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 if (&adapter->napi[i]) { 777 netdev_dbg(adapter->netdev, 778 "Releasing napi[%d]\n", i); 779 netif_napi_del(&adapter->napi[i]); 780 } 781 } 782 783 kfree(adapter->napi); 784 adapter->napi = NULL; 785 adapter->num_active_rx_napi = 0; 786 adapter->napi_enabled = false; 787 } 788 789 static int ibmvnic_login(struct net_device *netdev) 790 { 791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 792 unsigned long timeout = msecs_to_jiffies(30000); 793 int retry_count = 0; 794 bool retry; 795 int rc; 796 797 do { 798 retry = false; 799 if (retry_count > IBMVNIC_MAX_QUEUES) { 800 netdev_warn(netdev, "Login attempts exceeded\n"); 801 return -1; 802 } 803 804 adapter->init_done_rc = 0; 805 reinit_completion(&adapter->init_done); 806 rc = send_login(adapter); 807 if (rc) { 808 netdev_warn(netdev, "Unable to login\n"); 809 return rc; 810 } 811 812 if (!wait_for_completion_timeout(&adapter->init_done, 813 timeout)) { 814 netdev_warn(netdev, "Login timed out\n"); 815 return -1; 816 } 817 818 if (adapter->init_done_rc == PARTIALSUCCESS) { 819 retry_count++; 820 release_sub_crqs(adapter, 1); 821 822 retry = true; 823 netdev_dbg(netdev, 824 "Received partial success, retrying...\n"); 825 adapter->init_done_rc = 0; 826 reinit_completion(&adapter->init_done); 827 send_cap_queries(adapter); 828 if (!wait_for_completion_timeout(&adapter->init_done, 829 timeout)) { 830 netdev_warn(netdev, 831 "Capabilities query timed out\n"); 832 return -1; 833 } 834 835 rc = init_sub_crqs(adapter); 836 if (rc) { 837 netdev_warn(netdev, 838 "SCRQ initialization failed\n"); 839 return -1; 840 } 841 842 rc = init_sub_crq_irqs(adapter); 843 if (rc) { 844 netdev_warn(netdev, 845 "SCRQ irq initialization failed\n"); 846 return -1; 847 } 848 } else if (adapter->init_done_rc) { 849 netdev_warn(netdev, "Adapter login failed\n"); 850 return -1; 851 } 852 } while (retry); 853 854 /* handle pending MAC address changes after successful login */ 855 if (adapter->mac_change_pending) { 856 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 857 adapter->mac_change_pending = false; 858 } 859 860 return 0; 861 } 862 863 static void release_login_buffer(struct ibmvnic_adapter *adapter) 864 { 865 kfree(adapter->login_buf); 866 adapter->login_buf = NULL; 867 } 868 869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 870 { 871 kfree(adapter->login_rsp_buf); 872 adapter->login_rsp_buf = NULL; 873 } 874 875 static void release_resources(struct ibmvnic_adapter *adapter) 876 { 877 release_vpd_data(adapter); 878 879 release_tx_pools(adapter); 880 release_rx_pools(adapter); 881 882 release_napi(adapter); 883 release_login_rsp_buffer(adapter); 884 } 885 886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 887 { 888 struct net_device *netdev = adapter->netdev; 889 unsigned long timeout = msecs_to_jiffies(30000); 890 union ibmvnic_crq crq; 891 bool resend; 892 int rc; 893 894 netdev_dbg(netdev, "setting link state %d\n", link_state); 895 896 memset(&crq, 0, sizeof(crq)); 897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 899 crq.logical_link_state.link_state = link_state; 900 901 do { 902 resend = false; 903 904 reinit_completion(&adapter->init_done); 905 rc = ibmvnic_send_crq(adapter, &crq); 906 if (rc) { 907 netdev_err(netdev, "Failed to set link state\n"); 908 return rc; 909 } 910 911 if (!wait_for_completion_timeout(&adapter->init_done, 912 timeout)) { 913 netdev_err(netdev, "timeout setting link state\n"); 914 return -1; 915 } 916 917 if (adapter->init_done_rc == 1) { 918 /* Partuial success, delay and re-send */ 919 mdelay(1000); 920 resend = true; 921 } else if (adapter->init_done_rc) { 922 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 923 adapter->init_done_rc); 924 return adapter->init_done_rc; 925 } 926 } while (resend); 927 928 return 0; 929 } 930 931 static int set_real_num_queues(struct net_device *netdev) 932 { 933 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 934 int rc; 935 936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 937 adapter->req_tx_queues, adapter->req_rx_queues); 938 939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 940 if (rc) { 941 netdev_err(netdev, "failed to set the number of tx queues\n"); 942 return rc; 943 } 944 945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 946 if (rc) 947 netdev_err(netdev, "failed to set the number of rx queues\n"); 948 949 return rc; 950 } 951 952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 953 { 954 struct device *dev = &adapter->vdev->dev; 955 union ibmvnic_crq crq; 956 int len = 0; 957 int rc; 958 959 if (adapter->vpd->buff) 960 len = adapter->vpd->len; 961 962 init_completion(&adapter->fw_done); 963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 964 crq.get_vpd_size.cmd = GET_VPD_SIZE; 965 rc = ibmvnic_send_crq(adapter, &crq); 966 if (rc) 967 return rc; 968 wait_for_completion(&adapter->fw_done); 969 970 if (!adapter->vpd->len) 971 return -ENODATA; 972 973 if (!adapter->vpd->buff) 974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 975 else if (adapter->vpd->len != len) 976 adapter->vpd->buff = 977 krealloc(adapter->vpd->buff, 978 adapter->vpd->len, GFP_KERNEL); 979 980 if (!adapter->vpd->buff) { 981 dev_err(dev, "Could allocate VPD buffer\n"); 982 return -ENOMEM; 983 } 984 985 adapter->vpd->dma_addr = 986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 987 DMA_FROM_DEVICE); 988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 989 dev_err(dev, "Could not map VPD buffer\n"); 990 kfree(adapter->vpd->buff); 991 adapter->vpd->buff = NULL; 992 return -ENOMEM; 993 } 994 995 reinit_completion(&adapter->fw_done); 996 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 997 crq.get_vpd.cmd = GET_VPD; 998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1000 rc = ibmvnic_send_crq(adapter, &crq); 1001 if (rc) { 1002 kfree(adapter->vpd->buff); 1003 adapter->vpd->buff = NULL; 1004 return rc; 1005 } 1006 wait_for_completion(&adapter->fw_done); 1007 1008 return 0; 1009 } 1010 1011 static int init_resources(struct ibmvnic_adapter *adapter) 1012 { 1013 struct net_device *netdev = adapter->netdev; 1014 int rc; 1015 1016 rc = set_real_num_queues(netdev); 1017 if (rc) 1018 return rc; 1019 1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1021 if (!adapter->vpd) 1022 return -ENOMEM; 1023 1024 /* Vital Product Data (VPD) */ 1025 rc = ibmvnic_get_vpd(adapter); 1026 if (rc) { 1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1028 return rc; 1029 } 1030 1031 adapter->map_id = 1; 1032 1033 rc = init_napi(adapter); 1034 if (rc) 1035 return rc; 1036 1037 send_map_query(adapter); 1038 1039 rc = init_rx_pools(netdev); 1040 if (rc) 1041 return rc; 1042 1043 rc = init_tx_pools(netdev); 1044 return rc; 1045 } 1046 1047 static int __ibmvnic_open(struct net_device *netdev) 1048 { 1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1050 enum vnic_state prev_state = adapter->state; 1051 int i, rc; 1052 1053 adapter->state = VNIC_OPENING; 1054 replenish_pools(adapter); 1055 ibmvnic_napi_enable(adapter); 1056 1057 /* We're ready to receive frames, enable the sub-crq interrupts and 1058 * set the logical link state to up 1059 */ 1060 for (i = 0; i < adapter->req_rx_queues; i++) { 1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1062 if (prev_state == VNIC_CLOSED) 1063 enable_irq(adapter->rx_scrq[i]->irq); 1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1065 } 1066 1067 for (i = 0; i < adapter->req_tx_queues; i++) { 1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1069 if (prev_state == VNIC_CLOSED) 1070 enable_irq(adapter->tx_scrq[i]->irq); 1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1072 } 1073 1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1075 if (rc) { 1076 for (i = 0; i < adapter->req_rx_queues; i++) 1077 napi_disable(&adapter->napi[i]); 1078 release_resources(adapter); 1079 return rc; 1080 } 1081 1082 netif_tx_start_all_queues(netdev); 1083 1084 if (prev_state == VNIC_CLOSED) { 1085 for (i = 0; i < adapter->req_rx_queues; i++) 1086 napi_schedule(&adapter->napi[i]); 1087 } 1088 1089 adapter->state = VNIC_OPEN; 1090 return rc; 1091 } 1092 1093 static int ibmvnic_open(struct net_device *netdev) 1094 { 1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1096 int rc; 1097 1098 /* If device failover is pending, just set device state and return. 1099 * Device operation will be handled by reset routine. 1100 */ 1101 if (adapter->failover_pending) { 1102 adapter->state = VNIC_OPEN; 1103 return 0; 1104 } 1105 1106 if (adapter->state != VNIC_CLOSED) { 1107 rc = ibmvnic_login(netdev); 1108 if (rc) 1109 return rc; 1110 1111 rc = init_resources(adapter); 1112 if (rc) { 1113 netdev_err(netdev, "failed to initialize resources\n"); 1114 release_resources(adapter); 1115 return rc; 1116 } 1117 } 1118 1119 rc = __ibmvnic_open(netdev); 1120 netif_carrier_on(netdev); 1121 1122 return rc; 1123 } 1124 1125 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1126 { 1127 struct ibmvnic_rx_pool *rx_pool; 1128 struct ibmvnic_rx_buff *rx_buff; 1129 u64 rx_entries; 1130 int rx_scrqs; 1131 int i, j; 1132 1133 if (!adapter->rx_pool) 1134 return; 1135 1136 rx_scrqs = adapter->num_active_rx_pools; 1137 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1138 1139 /* Free any remaining skbs in the rx buffer pools */ 1140 for (i = 0; i < rx_scrqs; i++) { 1141 rx_pool = &adapter->rx_pool[i]; 1142 if (!rx_pool || !rx_pool->rx_buff) 1143 continue; 1144 1145 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1146 for (j = 0; j < rx_entries; j++) { 1147 rx_buff = &rx_pool->rx_buff[j]; 1148 if (rx_buff && rx_buff->skb) { 1149 dev_kfree_skb_any(rx_buff->skb); 1150 rx_buff->skb = NULL; 1151 } 1152 } 1153 } 1154 } 1155 1156 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1157 struct ibmvnic_tx_pool *tx_pool) 1158 { 1159 struct ibmvnic_tx_buff *tx_buff; 1160 u64 tx_entries; 1161 int i; 1162 1163 if (!tx_pool || !tx_pool->tx_buff) 1164 return; 1165 1166 tx_entries = tx_pool->num_buffers; 1167 1168 for (i = 0; i < tx_entries; i++) { 1169 tx_buff = &tx_pool->tx_buff[i]; 1170 if (tx_buff && tx_buff->skb) { 1171 dev_kfree_skb_any(tx_buff->skb); 1172 tx_buff->skb = NULL; 1173 } 1174 } 1175 } 1176 1177 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1178 { 1179 int tx_scrqs; 1180 int i; 1181 1182 if (!adapter->tx_pool || !adapter->tso_pool) 1183 return; 1184 1185 tx_scrqs = adapter->num_active_tx_pools; 1186 1187 /* Free any remaining skbs in the tx buffer pools */ 1188 for (i = 0; i < tx_scrqs; i++) { 1189 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1190 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1191 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1192 } 1193 } 1194 1195 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1196 { 1197 struct net_device *netdev = adapter->netdev; 1198 int i; 1199 1200 if (adapter->tx_scrq) { 1201 for (i = 0; i < adapter->req_tx_queues; i++) 1202 if (adapter->tx_scrq[i]->irq) { 1203 netdev_dbg(netdev, 1204 "Disabling tx_scrq[%d] irq\n", i); 1205 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1206 disable_irq(adapter->tx_scrq[i]->irq); 1207 } 1208 } 1209 1210 if (adapter->rx_scrq) { 1211 for (i = 0; i < adapter->req_rx_queues; i++) { 1212 if (adapter->rx_scrq[i]->irq) { 1213 netdev_dbg(netdev, 1214 "Disabling rx_scrq[%d] irq\n", i); 1215 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1216 disable_irq(adapter->rx_scrq[i]->irq); 1217 } 1218 } 1219 } 1220 } 1221 1222 static void ibmvnic_cleanup(struct net_device *netdev) 1223 { 1224 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1225 1226 /* ensure that transmissions are stopped if called by do_reset */ 1227 if (adapter->resetting) 1228 netif_tx_disable(netdev); 1229 else 1230 netif_tx_stop_all_queues(netdev); 1231 1232 ibmvnic_napi_disable(adapter); 1233 ibmvnic_disable_irqs(adapter); 1234 1235 clean_rx_pools(adapter); 1236 clean_tx_pools(adapter); 1237 } 1238 1239 static int __ibmvnic_close(struct net_device *netdev) 1240 { 1241 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1242 int rc = 0; 1243 1244 adapter->state = VNIC_CLOSING; 1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1246 if (rc) 1247 return rc; 1248 adapter->state = VNIC_CLOSED; 1249 return 0; 1250 } 1251 1252 static int ibmvnic_close(struct net_device *netdev) 1253 { 1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1255 int rc; 1256 1257 /* If device failover is pending, just set device state and return. 1258 * Device operation will be handled by reset routine. 1259 */ 1260 if (adapter->failover_pending) { 1261 adapter->state = VNIC_CLOSED; 1262 return 0; 1263 } 1264 1265 rc = __ibmvnic_close(netdev); 1266 ibmvnic_cleanup(netdev); 1267 1268 return rc; 1269 } 1270 1271 /** 1272 * build_hdr_data - creates L2/L3/L4 header data buffer 1273 * @hdr_field - bitfield determining needed headers 1274 * @skb - socket buffer 1275 * @hdr_len - array of header lengths 1276 * @tot_len - total length of data 1277 * 1278 * Reads hdr_field to determine which headers are needed by firmware. 1279 * Builds a buffer containing these headers. Saves individual header 1280 * lengths and total buffer length to be used to build descriptors. 1281 */ 1282 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1283 int *hdr_len, u8 *hdr_data) 1284 { 1285 int len = 0; 1286 u8 *hdr; 1287 1288 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1289 hdr_len[0] = sizeof(struct vlan_ethhdr); 1290 else 1291 hdr_len[0] = sizeof(struct ethhdr); 1292 1293 if (skb->protocol == htons(ETH_P_IP)) { 1294 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1295 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1296 hdr_len[2] = tcp_hdrlen(skb); 1297 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1298 hdr_len[2] = sizeof(struct udphdr); 1299 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1300 hdr_len[1] = sizeof(struct ipv6hdr); 1301 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1302 hdr_len[2] = tcp_hdrlen(skb); 1303 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1304 hdr_len[2] = sizeof(struct udphdr); 1305 } else if (skb->protocol == htons(ETH_P_ARP)) { 1306 hdr_len[1] = arp_hdr_len(skb->dev); 1307 hdr_len[2] = 0; 1308 } 1309 1310 memset(hdr_data, 0, 120); 1311 if ((hdr_field >> 6) & 1) { 1312 hdr = skb_mac_header(skb); 1313 memcpy(hdr_data, hdr, hdr_len[0]); 1314 len += hdr_len[0]; 1315 } 1316 1317 if ((hdr_field >> 5) & 1) { 1318 hdr = skb_network_header(skb); 1319 memcpy(hdr_data + len, hdr, hdr_len[1]); 1320 len += hdr_len[1]; 1321 } 1322 1323 if ((hdr_field >> 4) & 1) { 1324 hdr = skb_transport_header(skb); 1325 memcpy(hdr_data + len, hdr, hdr_len[2]); 1326 len += hdr_len[2]; 1327 } 1328 return len; 1329 } 1330 1331 /** 1332 * create_hdr_descs - create header and header extension descriptors 1333 * @hdr_field - bitfield determining needed headers 1334 * @data - buffer containing header data 1335 * @len - length of data buffer 1336 * @hdr_len - array of individual header lengths 1337 * @scrq_arr - descriptor array 1338 * 1339 * Creates header and, if needed, header extension descriptors and 1340 * places them in a descriptor array, scrq_arr 1341 */ 1342 1343 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1344 union sub_crq *scrq_arr) 1345 { 1346 union sub_crq hdr_desc; 1347 int tmp_len = len; 1348 int num_descs = 0; 1349 u8 *data, *cur; 1350 int tmp; 1351 1352 while (tmp_len > 0) { 1353 cur = hdr_data + len - tmp_len; 1354 1355 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1356 if (cur != hdr_data) { 1357 data = hdr_desc.hdr_ext.data; 1358 tmp = tmp_len > 29 ? 29 : tmp_len; 1359 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1360 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1361 hdr_desc.hdr_ext.len = tmp; 1362 } else { 1363 data = hdr_desc.hdr.data; 1364 tmp = tmp_len > 24 ? 24 : tmp_len; 1365 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1366 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1367 hdr_desc.hdr.len = tmp; 1368 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1369 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1370 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1371 hdr_desc.hdr.flag = hdr_field << 1; 1372 } 1373 memcpy(data, cur, tmp); 1374 tmp_len -= tmp; 1375 *scrq_arr = hdr_desc; 1376 scrq_arr++; 1377 num_descs++; 1378 } 1379 1380 return num_descs; 1381 } 1382 1383 /** 1384 * build_hdr_descs_arr - build a header descriptor array 1385 * @skb - socket buffer 1386 * @num_entries - number of descriptors to be sent 1387 * @subcrq - first TX descriptor 1388 * @hdr_field - bit field determining which headers will be sent 1389 * 1390 * This function will build a TX descriptor array with applicable 1391 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1392 */ 1393 1394 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1395 int *num_entries, u8 hdr_field) 1396 { 1397 int hdr_len[3] = {0, 0, 0}; 1398 int tot_len; 1399 u8 *hdr_data = txbuff->hdr_data; 1400 1401 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1402 txbuff->hdr_data); 1403 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1404 txbuff->indir_arr + 1); 1405 } 1406 1407 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1408 struct net_device *netdev) 1409 { 1410 /* For some backing devices, mishandling of small packets 1411 * can result in a loss of connection or TX stall. Device 1412 * architects recommend that no packet should be smaller 1413 * than the minimum MTU value provided to the driver, so 1414 * pad any packets to that length 1415 */ 1416 if (skb->len < netdev->min_mtu) 1417 return skb_put_padto(skb, netdev->min_mtu); 1418 1419 return 0; 1420 } 1421 1422 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1423 { 1424 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1425 int queue_num = skb_get_queue_mapping(skb); 1426 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1427 struct device *dev = &adapter->vdev->dev; 1428 struct ibmvnic_tx_buff *tx_buff = NULL; 1429 struct ibmvnic_sub_crq_queue *tx_scrq; 1430 struct ibmvnic_tx_pool *tx_pool; 1431 unsigned int tx_send_failed = 0; 1432 unsigned int tx_map_failed = 0; 1433 unsigned int tx_dropped = 0; 1434 unsigned int tx_packets = 0; 1435 unsigned int tx_bytes = 0; 1436 dma_addr_t data_dma_addr; 1437 struct netdev_queue *txq; 1438 unsigned long lpar_rc; 1439 union sub_crq tx_crq; 1440 unsigned int offset; 1441 int num_entries = 1; 1442 unsigned char *dst; 1443 u64 *handle_array; 1444 int index = 0; 1445 u8 proto = 0; 1446 netdev_tx_t ret = NETDEV_TX_OK; 1447 1448 if (adapter->resetting) { 1449 if (!netif_subqueue_stopped(netdev, skb)) 1450 netif_stop_subqueue(netdev, queue_num); 1451 dev_kfree_skb_any(skb); 1452 1453 tx_send_failed++; 1454 tx_dropped++; 1455 ret = NETDEV_TX_OK; 1456 goto out; 1457 } 1458 1459 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1460 tx_dropped++; 1461 tx_send_failed++; 1462 ret = NETDEV_TX_OK; 1463 goto out; 1464 } 1465 if (skb_is_gso(skb)) 1466 tx_pool = &adapter->tso_pool[queue_num]; 1467 else 1468 tx_pool = &adapter->tx_pool[queue_num]; 1469 1470 tx_scrq = adapter->tx_scrq[queue_num]; 1471 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1472 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1473 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1474 1475 index = tx_pool->free_map[tx_pool->consumer_index]; 1476 1477 if (index == IBMVNIC_INVALID_MAP) { 1478 dev_kfree_skb_any(skb); 1479 tx_send_failed++; 1480 tx_dropped++; 1481 ret = NETDEV_TX_OK; 1482 goto out; 1483 } 1484 1485 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1486 1487 offset = index * tx_pool->buf_size; 1488 dst = tx_pool->long_term_buff.buff + offset; 1489 memset(dst, 0, tx_pool->buf_size); 1490 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1491 1492 if (skb_shinfo(skb)->nr_frags) { 1493 int cur, i; 1494 1495 /* Copy the head */ 1496 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1497 cur = skb_headlen(skb); 1498 1499 /* Copy the frags */ 1500 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1501 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1502 1503 memcpy(dst + cur, 1504 page_address(skb_frag_page(frag)) + 1505 frag->page_offset, skb_frag_size(frag)); 1506 cur += skb_frag_size(frag); 1507 } 1508 } else { 1509 skb_copy_from_linear_data(skb, dst, skb->len); 1510 } 1511 1512 tx_pool->consumer_index = 1513 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1514 1515 tx_buff = &tx_pool->tx_buff[index]; 1516 tx_buff->skb = skb; 1517 tx_buff->data_dma[0] = data_dma_addr; 1518 tx_buff->data_len[0] = skb->len; 1519 tx_buff->index = index; 1520 tx_buff->pool_index = queue_num; 1521 tx_buff->last_frag = true; 1522 1523 memset(&tx_crq, 0, sizeof(tx_crq)); 1524 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1525 tx_crq.v1.type = IBMVNIC_TX_DESC; 1526 tx_crq.v1.n_crq_elem = 1; 1527 tx_crq.v1.n_sge = 1; 1528 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1529 1530 if (skb_is_gso(skb)) 1531 tx_crq.v1.correlator = 1532 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1533 else 1534 tx_crq.v1.correlator = cpu_to_be32(index); 1535 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1536 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1537 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1538 1539 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1540 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1541 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1542 } 1543 1544 if (skb->protocol == htons(ETH_P_IP)) { 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1546 proto = ip_hdr(skb)->protocol; 1547 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1549 proto = ipv6_hdr(skb)->nexthdr; 1550 } 1551 1552 if (proto == IPPROTO_TCP) 1553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1554 else if (proto == IPPROTO_UDP) 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1556 1557 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1558 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1559 hdrs += 2; 1560 } 1561 if (skb_is_gso(skb)) { 1562 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1563 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1564 hdrs += 2; 1565 } 1566 /* determine if l2/3/4 headers are sent to firmware */ 1567 if ((*hdrs >> 7) & 1) { 1568 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1569 tx_crq.v1.n_crq_elem = num_entries; 1570 tx_buff->num_entries = num_entries; 1571 tx_buff->indir_arr[0] = tx_crq; 1572 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1573 sizeof(tx_buff->indir_arr), 1574 DMA_TO_DEVICE); 1575 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1576 dev_kfree_skb_any(skb); 1577 tx_buff->skb = NULL; 1578 if (!firmware_has_feature(FW_FEATURE_CMO)) 1579 dev_err(dev, "tx: unable to map descriptor array\n"); 1580 tx_map_failed++; 1581 tx_dropped++; 1582 ret = NETDEV_TX_OK; 1583 goto tx_err_out; 1584 } 1585 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1586 (u64)tx_buff->indir_dma, 1587 (u64)num_entries); 1588 } else { 1589 tx_buff->num_entries = num_entries; 1590 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1591 &tx_crq); 1592 } 1593 if (lpar_rc != H_SUCCESS) { 1594 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1595 dev_err_ratelimited(dev, "tx: send failed\n"); 1596 dev_kfree_skb_any(skb); 1597 tx_buff->skb = NULL; 1598 1599 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1600 /* Disable TX and report carrier off if queue is closed 1601 * or pending failover. 1602 * Firmware guarantees that a signal will be sent to the 1603 * driver, triggering a reset or some other action. 1604 */ 1605 netif_tx_stop_all_queues(netdev); 1606 netif_carrier_off(netdev); 1607 } 1608 1609 tx_send_failed++; 1610 tx_dropped++; 1611 ret = NETDEV_TX_OK; 1612 goto tx_err_out; 1613 } 1614 1615 if (atomic_add_return(num_entries, &tx_scrq->used) 1616 >= adapter->req_tx_entries_per_subcrq) { 1617 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1618 netif_stop_subqueue(netdev, queue_num); 1619 } 1620 1621 tx_packets++; 1622 tx_bytes += skb->len; 1623 txq->trans_start = jiffies; 1624 ret = NETDEV_TX_OK; 1625 goto out; 1626 1627 tx_err_out: 1628 /* roll back consumer index and map array*/ 1629 if (tx_pool->consumer_index == 0) 1630 tx_pool->consumer_index = 1631 tx_pool->num_buffers - 1; 1632 else 1633 tx_pool->consumer_index--; 1634 tx_pool->free_map[tx_pool->consumer_index] = index; 1635 out: 1636 netdev->stats.tx_dropped += tx_dropped; 1637 netdev->stats.tx_bytes += tx_bytes; 1638 netdev->stats.tx_packets += tx_packets; 1639 adapter->tx_send_failed += tx_send_failed; 1640 adapter->tx_map_failed += tx_map_failed; 1641 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1642 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1643 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1644 1645 return ret; 1646 } 1647 1648 static void ibmvnic_set_multi(struct net_device *netdev) 1649 { 1650 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1651 struct netdev_hw_addr *ha; 1652 union ibmvnic_crq crq; 1653 1654 memset(&crq, 0, sizeof(crq)); 1655 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1656 crq.request_capability.cmd = REQUEST_CAPABILITY; 1657 1658 if (netdev->flags & IFF_PROMISC) { 1659 if (!adapter->promisc_supported) 1660 return; 1661 } else { 1662 if (netdev->flags & IFF_ALLMULTI) { 1663 /* Accept all multicast */ 1664 memset(&crq, 0, sizeof(crq)); 1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1668 ibmvnic_send_crq(adapter, &crq); 1669 } else if (netdev_mc_empty(netdev)) { 1670 /* Reject all multicast */ 1671 memset(&crq, 0, sizeof(crq)); 1672 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1673 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1674 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1675 ibmvnic_send_crq(adapter, &crq); 1676 } else { 1677 /* Accept one or more multicast(s) */ 1678 netdev_for_each_mc_addr(ha, netdev) { 1679 memset(&crq, 0, sizeof(crq)); 1680 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1681 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1682 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1683 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1684 ha->addr); 1685 ibmvnic_send_crq(adapter, &crq); 1686 } 1687 } 1688 } 1689 } 1690 1691 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1692 { 1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1694 struct sockaddr *addr = p; 1695 union ibmvnic_crq crq; 1696 int rc; 1697 1698 if (!is_valid_ether_addr(addr->sa_data)) 1699 return -EADDRNOTAVAIL; 1700 1701 memset(&crq, 0, sizeof(crq)); 1702 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1703 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1704 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1705 1706 init_completion(&adapter->fw_done); 1707 rc = ibmvnic_send_crq(adapter, &crq); 1708 if (rc) 1709 return rc; 1710 wait_for_completion(&adapter->fw_done); 1711 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1712 return adapter->fw_done_rc ? -EIO : 0; 1713 } 1714 1715 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1716 { 1717 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1718 struct sockaddr *addr = p; 1719 int rc; 1720 1721 if (adapter->state == VNIC_PROBED) { 1722 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1723 adapter->mac_change_pending = true; 1724 return 0; 1725 } 1726 1727 rc = __ibmvnic_set_mac(netdev, addr); 1728 1729 return rc; 1730 } 1731 1732 /** 1733 * do_reset returns zero if we are able to keep processing reset events, or 1734 * non-zero if we hit a fatal error and must halt. 1735 */ 1736 static int do_reset(struct ibmvnic_adapter *adapter, 1737 struct ibmvnic_rwi *rwi, u32 reset_state) 1738 { 1739 u64 old_num_rx_queues, old_num_tx_queues; 1740 u64 old_num_rx_slots, old_num_tx_slots; 1741 struct net_device *netdev = adapter->netdev; 1742 int i, rc; 1743 1744 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1745 rwi->reset_reason); 1746 1747 netif_carrier_off(netdev); 1748 adapter->reset_reason = rwi->reset_reason; 1749 1750 old_num_rx_queues = adapter->req_rx_queues; 1751 old_num_tx_queues = adapter->req_tx_queues; 1752 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1753 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1754 1755 ibmvnic_cleanup(netdev); 1756 1757 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1758 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1759 rc = __ibmvnic_close(netdev); 1760 if (rc) 1761 return rc; 1762 } 1763 1764 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1765 adapter->wait_for_reset) { 1766 release_resources(adapter); 1767 release_sub_crqs(adapter, 1); 1768 release_crq_queue(adapter); 1769 } 1770 1771 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1772 /* remove the closed state so when we call open it appears 1773 * we are coming from the probed state. 1774 */ 1775 adapter->state = VNIC_PROBED; 1776 1777 if (adapter->wait_for_reset) { 1778 rc = init_crq_queue(adapter); 1779 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1780 rc = ibmvnic_reenable_crq_queue(adapter); 1781 release_sub_crqs(adapter, 1); 1782 } else { 1783 rc = ibmvnic_reset_crq(adapter); 1784 if (!rc) 1785 rc = vio_enable_interrupts(adapter->vdev); 1786 } 1787 1788 if (rc) { 1789 netdev_err(adapter->netdev, 1790 "Couldn't initialize crq. rc=%d\n", rc); 1791 return rc; 1792 } 1793 1794 rc = ibmvnic_reset_init(adapter); 1795 if (rc) 1796 return IBMVNIC_INIT_FAILED; 1797 1798 /* If the adapter was in PROBE state prior to the reset, 1799 * exit here. 1800 */ 1801 if (reset_state == VNIC_PROBED) 1802 return 0; 1803 1804 rc = ibmvnic_login(netdev); 1805 if (rc) { 1806 adapter->state = reset_state; 1807 return rc; 1808 } 1809 1810 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1811 adapter->wait_for_reset) { 1812 rc = init_resources(adapter); 1813 if (rc) 1814 return rc; 1815 } else if (adapter->req_rx_queues != old_num_rx_queues || 1816 adapter->req_tx_queues != old_num_tx_queues || 1817 adapter->req_rx_add_entries_per_subcrq != 1818 old_num_rx_slots || 1819 adapter->req_tx_entries_per_subcrq != 1820 old_num_tx_slots) { 1821 release_rx_pools(adapter); 1822 release_tx_pools(adapter); 1823 release_napi(adapter); 1824 release_vpd_data(adapter); 1825 1826 rc = init_resources(adapter); 1827 if (rc) 1828 return rc; 1829 1830 } else { 1831 rc = reset_tx_pools(adapter); 1832 if (rc) 1833 return rc; 1834 1835 rc = reset_rx_pools(adapter); 1836 if (rc) 1837 return rc; 1838 } 1839 ibmvnic_disable_irqs(adapter); 1840 } 1841 adapter->state = VNIC_CLOSED; 1842 1843 if (reset_state == VNIC_CLOSED) 1844 return 0; 1845 1846 rc = __ibmvnic_open(netdev); 1847 if (rc) { 1848 if (list_empty(&adapter->rwi_list)) 1849 adapter->state = VNIC_CLOSED; 1850 else 1851 adapter->state = reset_state; 1852 1853 return 0; 1854 } 1855 1856 /* kick napi */ 1857 for (i = 0; i < adapter->req_rx_queues; i++) 1858 napi_schedule(&adapter->napi[i]); 1859 1860 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1861 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1862 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1863 1864 netif_carrier_on(netdev); 1865 1866 return 0; 1867 } 1868 1869 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1870 struct ibmvnic_rwi *rwi, u32 reset_state) 1871 { 1872 struct net_device *netdev = adapter->netdev; 1873 int rc; 1874 1875 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1876 rwi->reset_reason); 1877 1878 netif_carrier_off(netdev); 1879 adapter->reset_reason = rwi->reset_reason; 1880 1881 ibmvnic_cleanup(netdev); 1882 release_resources(adapter); 1883 release_sub_crqs(adapter, 0); 1884 release_crq_queue(adapter); 1885 1886 /* remove the closed state so when we call open it appears 1887 * we are coming from the probed state. 1888 */ 1889 adapter->state = VNIC_PROBED; 1890 1891 rc = init_crq_queue(adapter); 1892 if (rc) { 1893 netdev_err(adapter->netdev, 1894 "Couldn't initialize crq. rc=%d\n", rc); 1895 return rc; 1896 } 1897 1898 rc = ibmvnic_init(adapter); 1899 if (rc) 1900 return rc; 1901 1902 /* If the adapter was in PROBE state prior to the reset, 1903 * exit here. 1904 */ 1905 if (reset_state == VNIC_PROBED) 1906 return 0; 1907 1908 rc = ibmvnic_login(netdev); 1909 if (rc) { 1910 adapter->state = VNIC_PROBED; 1911 return 0; 1912 } 1913 1914 rc = init_resources(adapter); 1915 if (rc) 1916 return rc; 1917 1918 ibmvnic_disable_irqs(adapter); 1919 adapter->state = VNIC_CLOSED; 1920 1921 if (reset_state == VNIC_CLOSED) 1922 return 0; 1923 1924 rc = __ibmvnic_open(netdev); 1925 if (rc) { 1926 if (list_empty(&adapter->rwi_list)) 1927 adapter->state = VNIC_CLOSED; 1928 else 1929 adapter->state = reset_state; 1930 1931 return 0; 1932 } 1933 1934 netif_carrier_on(netdev); 1935 1936 return 0; 1937 } 1938 1939 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1940 { 1941 struct ibmvnic_rwi *rwi; 1942 unsigned long flags; 1943 1944 spin_lock_irqsave(&adapter->rwi_lock, flags); 1945 1946 if (!list_empty(&adapter->rwi_list)) { 1947 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1948 list); 1949 list_del(&rwi->list); 1950 } else { 1951 rwi = NULL; 1952 } 1953 1954 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 1955 return rwi; 1956 } 1957 1958 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1959 { 1960 struct ibmvnic_rwi *rwi; 1961 1962 rwi = get_next_rwi(adapter); 1963 while (rwi) { 1964 kfree(rwi); 1965 rwi = get_next_rwi(adapter); 1966 } 1967 } 1968 1969 static void __ibmvnic_reset(struct work_struct *work) 1970 { 1971 struct ibmvnic_rwi *rwi; 1972 struct ibmvnic_adapter *adapter; 1973 struct net_device *netdev; 1974 bool we_lock_rtnl = false; 1975 u32 reset_state; 1976 int rc = 0; 1977 1978 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1979 netdev = adapter->netdev; 1980 1981 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1982 * unless wait_for_reset is set, in which case the rtnl lock 1983 * has already been taken before initializing the reset 1984 */ 1985 if (!adapter->wait_for_reset) { 1986 rtnl_lock(); 1987 we_lock_rtnl = true; 1988 } 1989 reset_state = adapter->state; 1990 1991 rwi = get_next_rwi(adapter); 1992 while (rwi) { 1993 if (adapter->force_reset_recovery) { 1994 adapter->force_reset_recovery = false; 1995 rc = do_hard_reset(adapter, rwi, reset_state); 1996 } else { 1997 rc = do_reset(adapter, rwi, reset_state); 1998 } 1999 kfree(rwi); 2000 if (rc && rc != IBMVNIC_INIT_FAILED && 2001 !adapter->force_reset_recovery) 2002 break; 2003 2004 rwi = get_next_rwi(adapter); 2005 } 2006 2007 if (adapter->wait_for_reset) { 2008 adapter->wait_for_reset = false; 2009 adapter->reset_done_rc = rc; 2010 complete(&adapter->reset_done); 2011 } 2012 2013 if (rc) { 2014 netdev_dbg(adapter->netdev, "Reset failed\n"); 2015 free_all_rwi(adapter); 2016 } 2017 2018 adapter->resetting = false; 2019 if (we_lock_rtnl) 2020 rtnl_unlock(); 2021 } 2022 2023 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2024 enum ibmvnic_reset_reason reason) 2025 { 2026 struct list_head *entry, *tmp_entry; 2027 struct ibmvnic_rwi *rwi, *tmp; 2028 struct net_device *netdev = adapter->netdev; 2029 unsigned long flags; 2030 int ret; 2031 2032 if (adapter->state == VNIC_REMOVING || 2033 adapter->state == VNIC_REMOVED || 2034 adapter->failover_pending) { 2035 ret = EBUSY; 2036 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2037 goto err; 2038 } 2039 2040 if (adapter->state == VNIC_PROBING) { 2041 netdev_warn(netdev, "Adapter reset during probe\n"); 2042 ret = adapter->init_done_rc = EAGAIN; 2043 goto err; 2044 } 2045 2046 spin_lock_irqsave(&adapter->rwi_lock, flags); 2047 2048 list_for_each(entry, &adapter->rwi_list) { 2049 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2050 if (tmp->reset_reason == reason) { 2051 netdev_dbg(netdev, "Skipping matching reset\n"); 2052 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2053 ret = EBUSY; 2054 goto err; 2055 } 2056 } 2057 2058 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2059 if (!rwi) { 2060 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2061 ibmvnic_close(netdev); 2062 ret = ENOMEM; 2063 goto err; 2064 } 2065 /* if we just received a transport event, 2066 * flush reset queue and process this reset 2067 */ 2068 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2069 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2070 list_del(entry); 2071 } 2072 rwi->reset_reason = reason; 2073 list_add_tail(&rwi->list, &adapter->rwi_list); 2074 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2075 adapter->resetting = true; 2076 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2077 schedule_work(&adapter->ibmvnic_reset); 2078 2079 return 0; 2080 err: 2081 if (adapter->wait_for_reset) 2082 adapter->wait_for_reset = false; 2083 return -ret; 2084 } 2085 2086 static void ibmvnic_tx_timeout(struct net_device *dev) 2087 { 2088 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2089 2090 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2091 } 2092 2093 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2094 struct ibmvnic_rx_buff *rx_buff) 2095 { 2096 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2097 2098 rx_buff->skb = NULL; 2099 2100 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2101 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2102 2103 atomic_dec(&pool->available); 2104 } 2105 2106 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2107 { 2108 struct net_device *netdev = napi->dev; 2109 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2110 int scrq_num = (int)(napi - adapter->napi); 2111 int frames_processed = 0; 2112 2113 restart_poll: 2114 while (frames_processed < budget) { 2115 struct sk_buff *skb; 2116 struct ibmvnic_rx_buff *rx_buff; 2117 union sub_crq *next; 2118 u32 length; 2119 u16 offset; 2120 u8 flags = 0; 2121 2122 if (unlikely(adapter->resetting && 2123 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2124 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2125 napi_complete_done(napi, frames_processed); 2126 return frames_processed; 2127 } 2128 2129 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2130 break; 2131 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2132 rx_buff = 2133 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2134 rx_comp.correlator); 2135 /* do error checking */ 2136 if (next->rx_comp.rc) { 2137 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2138 be16_to_cpu(next->rx_comp.rc)); 2139 /* free the entry */ 2140 next->rx_comp.first = 0; 2141 dev_kfree_skb_any(rx_buff->skb); 2142 remove_buff_from_pool(adapter, rx_buff); 2143 continue; 2144 } else if (!rx_buff->skb) { 2145 /* free the entry */ 2146 next->rx_comp.first = 0; 2147 remove_buff_from_pool(adapter, rx_buff); 2148 continue; 2149 } 2150 2151 length = be32_to_cpu(next->rx_comp.len); 2152 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2153 flags = next->rx_comp.flags; 2154 skb = rx_buff->skb; 2155 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2156 length); 2157 2158 /* VLAN Header has been stripped by the system firmware and 2159 * needs to be inserted by the driver 2160 */ 2161 if (adapter->rx_vlan_header_insertion && 2162 (flags & IBMVNIC_VLAN_STRIPPED)) 2163 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2164 ntohs(next->rx_comp.vlan_tci)); 2165 2166 /* free the entry */ 2167 next->rx_comp.first = 0; 2168 remove_buff_from_pool(adapter, rx_buff); 2169 2170 skb_put(skb, length); 2171 skb->protocol = eth_type_trans(skb, netdev); 2172 skb_record_rx_queue(skb, scrq_num); 2173 2174 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2175 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2176 skb->ip_summed = CHECKSUM_UNNECESSARY; 2177 } 2178 2179 length = skb->len; 2180 napi_gro_receive(napi, skb); /* send it up */ 2181 netdev->stats.rx_packets++; 2182 netdev->stats.rx_bytes += length; 2183 adapter->rx_stats_buffers[scrq_num].packets++; 2184 adapter->rx_stats_buffers[scrq_num].bytes += length; 2185 frames_processed++; 2186 } 2187 2188 if (adapter->state != VNIC_CLOSING) 2189 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2190 2191 if (frames_processed < budget) { 2192 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2193 napi_complete_done(napi, frames_processed); 2194 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2195 napi_reschedule(napi)) { 2196 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2197 goto restart_poll; 2198 } 2199 } 2200 return frames_processed; 2201 } 2202 2203 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2204 { 2205 int rc, ret; 2206 2207 adapter->fallback.mtu = adapter->req_mtu; 2208 adapter->fallback.rx_queues = adapter->req_rx_queues; 2209 adapter->fallback.tx_queues = adapter->req_tx_queues; 2210 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2211 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2212 2213 init_completion(&adapter->reset_done); 2214 adapter->wait_for_reset = true; 2215 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2216 if (rc) 2217 return rc; 2218 wait_for_completion(&adapter->reset_done); 2219 2220 ret = 0; 2221 if (adapter->reset_done_rc) { 2222 ret = -EIO; 2223 adapter->desired.mtu = adapter->fallback.mtu; 2224 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2225 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2226 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2227 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2228 2229 init_completion(&adapter->reset_done); 2230 adapter->wait_for_reset = true; 2231 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2232 if (rc) 2233 return ret; 2234 wait_for_completion(&adapter->reset_done); 2235 } 2236 adapter->wait_for_reset = false; 2237 2238 return ret; 2239 } 2240 2241 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2242 { 2243 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2244 2245 adapter->desired.mtu = new_mtu + ETH_HLEN; 2246 2247 return wait_for_reset(adapter); 2248 } 2249 2250 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2251 struct net_device *dev, 2252 netdev_features_t features) 2253 { 2254 /* Some backing hardware adapters can not 2255 * handle packets with a MSS less than 224 2256 * or with only one segment. 2257 */ 2258 if (skb_is_gso(skb)) { 2259 if (skb_shinfo(skb)->gso_size < 224 || 2260 skb_shinfo(skb)->gso_segs == 1) 2261 features &= ~NETIF_F_GSO_MASK; 2262 } 2263 2264 return features; 2265 } 2266 2267 static const struct net_device_ops ibmvnic_netdev_ops = { 2268 .ndo_open = ibmvnic_open, 2269 .ndo_stop = ibmvnic_close, 2270 .ndo_start_xmit = ibmvnic_xmit, 2271 .ndo_set_rx_mode = ibmvnic_set_multi, 2272 .ndo_set_mac_address = ibmvnic_set_mac, 2273 .ndo_validate_addr = eth_validate_addr, 2274 .ndo_tx_timeout = ibmvnic_tx_timeout, 2275 .ndo_change_mtu = ibmvnic_change_mtu, 2276 .ndo_features_check = ibmvnic_features_check, 2277 }; 2278 2279 /* ethtool functions */ 2280 2281 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2282 struct ethtool_link_ksettings *cmd) 2283 { 2284 u32 supported, advertising; 2285 2286 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2287 SUPPORTED_FIBRE); 2288 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2289 ADVERTISED_FIBRE); 2290 cmd->base.speed = SPEED_1000; 2291 cmd->base.duplex = DUPLEX_FULL; 2292 cmd->base.port = PORT_FIBRE; 2293 cmd->base.phy_address = 0; 2294 cmd->base.autoneg = AUTONEG_ENABLE; 2295 2296 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2297 supported); 2298 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2299 advertising); 2300 2301 return 0; 2302 } 2303 2304 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2305 struct ethtool_drvinfo *info) 2306 { 2307 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2308 2309 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2310 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2311 strlcpy(info->fw_version, adapter->fw_version, 2312 sizeof(info->fw_version)); 2313 } 2314 2315 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2316 { 2317 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2318 2319 return adapter->msg_enable; 2320 } 2321 2322 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2323 { 2324 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2325 2326 adapter->msg_enable = data; 2327 } 2328 2329 static u32 ibmvnic_get_link(struct net_device *netdev) 2330 { 2331 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2332 2333 /* Don't need to send a query because we request a logical link up at 2334 * init and then we wait for link state indications 2335 */ 2336 return adapter->logical_link_state; 2337 } 2338 2339 static void ibmvnic_get_ringparam(struct net_device *netdev, 2340 struct ethtool_ringparam *ring) 2341 { 2342 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2343 2344 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2345 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2346 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2347 } else { 2348 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2349 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2350 } 2351 ring->rx_mini_max_pending = 0; 2352 ring->rx_jumbo_max_pending = 0; 2353 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2354 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2355 ring->rx_mini_pending = 0; 2356 ring->rx_jumbo_pending = 0; 2357 } 2358 2359 static int ibmvnic_set_ringparam(struct net_device *netdev, 2360 struct ethtool_ringparam *ring) 2361 { 2362 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2363 int ret; 2364 2365 ret = 0; 2366 adapter->desired.rx_entries = ring->rx_pending; 2367 adapter->desired.tx_entries = ring->tx_pending; 2368 2369 ret = wait_for_reset(adapter); 2370 2371 if (!ret && 2372 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2373 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2374 netdev_info(netdev, 2375 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2376 ring->rx_pending, ring->tx_pending, 2377 adapter->req_rx_add_entries_per_subcrq, 2378 adapter->req_tx_entries_per_subcrq); 2379 return ret; 2380 } 2381 2382 static void ibmvnic_get_channels(struct net_device *netdev, 2383 struct ethtool_channels *channels) 2384 { 2385 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2386 2387 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2388 channels->max_rx = adapter->max_rx_queues; 2389 channels->max_tx = adapter->max_tx_queues; 2390 } else { 2391 channels->max_rx = IBMVNIC_MAX_QUEUES; 2392 channels->max_tx = IBMVNIC_MAX_QUEUES; 2393 } 2394 2395 channels->max_other = 0; 2396 channels->max_combined = 0; 2397 channels->rx_count = adapter->req_rx_queues; 2398 channels->tx_count = adapter->req_tx_queues; 2399 channels->other_count = 0; 2400 channels->combined_count = 0; 2401 } 2402 2403 static int ibmvnic_set_channels(struct net_device *netdev, 2404 struct ethtool_channels *channels) 2405 { 2406 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2407 int ret; 2408 2409 ret = 0; 2410 adapter->desired.rx_queues = channels->rx_count; 2411 adapter->desired.tx_queues = channels->tx_count; 2412 2413 ret = wait_for_reset(adapter); 2414 2415 if (!ret && 2416 (adapter->req_rx_queues != channels->rx_count || 2417 adapter->req_tx_queues != channels->tx_count)) 2418 netdev_info(netdev, 2419 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2420 channels->rx_count, channels->tx_count, 2421 adapter->req_rx_queues, adapter->req_tx_queues); 2422 return ret; 2423 2424 } 2425 2426 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2427 { 2428 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2429 int i; 2430 2431 switch (stringset) { 2432 case ETH_SS_STATS: 2433 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2434 i++, data += ETH_GSTRING_LEN) 2435 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2436 2437 for (i = 0; i < adapter->req_tx_queues; i++) { 2438 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2439 data += ETH_GSTRING_LEN; 2440 2441 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2442 data += ETH_GSTRING_LEN; 2443 2444 snprintf(data, ETH_GSTRING_LEN, 2445 "tx%d_dropped_packets", i); 2446 data += ETH_GSTRING_LEN; 2447 } 2448 2449 for (i = 0; i < adapter->req_rx_queues; i++) { 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2451 data += ETH_GSTRING_LEN; 2452 2453 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2454 data += ETH_GSTRING_LEN; 2455 2456 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2457 data += ETH_GSTRING_LEN; 2458 } 2459 break; 2460 2461 case ETH_SS_PRIV_FLAGS: 2462 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2463 strcpy(data + i * ETH_GSTRING_LEN, 2464 ibmvnic_priv_flags[i]); 2465 break; 2466 default: 2467 return; 2468 } 2469 } 2470 2471 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2472 { 2473 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2474 2475 switch (sset) { 2476 case ETH_SS_STATS: 2477 return ARRAY_SIZE(ibmvnic_stats) + 2478 adapter->req_tx_queues * NUM_TX_STATS + 2479 adapter->req_rx_queues * NUM_RX_STATS; 2480 case ETH_SS_PRIV_FLAGS: 2481 return ARRAY_SIZE(ibmvnic_priv_flags); 2482 default: 2483 return -EOPNOTSUPP; 2484 } 2485 } 2486 2487 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2488 struct ethtool_stats *stats, u64 *data) 2489 { 2490 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2491 union ibmvnic_crq crq; 2492 int i, j; 2493 int rc; 2494 2495 memset(&crq, 0, sizeof(crq)); 2496 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2497 crq.request_statistics.cmd = REQUEST_STATISTICS; 2498 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2499 crq.request_statistics.len = 2500 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2501 2502 /* Wait for data to be written */ 2503 init_completion(&adapter->stats_done); 2504 rc = ibmvnic_send_crq(adapter, &crq); 2505 if (rc) 2506 return; 2507 wait_for_completion(&adapter->stats_done); 2508 2509 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2510 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2511 ibmvnic_stats[i].offset)); 2512 2513 for (j = 0; j < adapter->req_tx_queues; j++) { 2514 data[i] = adapter->tx_stats_buffers[j].packets; 2515 i++; 2516 data[i] = adapter->tx_stats_buffers[j].bytes; 2517 i++; 2518 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2519 i++; 2520 } 2521 2522 for (j = 0; j < adapter->req_rx_queues; j++) { 2523 data[i] = adapter->rx_stats_buffers[j].packets; 2524 i++; 2525 data[i] = adapter->rx_stats_buffers[j].bytes; 2526 i++; 2527 data[i] = adapter->rx_stats_buffers[j].interrupts; 2528 i++; 2529 } 2530 } 2531 2532 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2533 { 2534 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2535 2536 return adapter->priv_flags; 2537 } 2538 2539 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2540 { 2541 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2542 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2543 2544 if (which_maxes) 2545 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2546 else 2547 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2548 2549 return 0; 2550 } 2551 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2552 .get_drvinfo = ibmvnic_get_drvinfo, 2553 .get_msglevel = ibmvnic_get_msglevel, 2554 .set_msglevel = ibmvnic_set_msglevel, 2555 .get_link = ibmvnic_get_link, 2556 .get_ringparam = ibmvnic_get_ringparam, 2557 .set_ringparam = ibmvnic_set_ringparam, 2558 .get_channels = ibmvnic_get_channels, 2559 .set_channels = ibmvnic_set_channels, 2560 .get_strings = ibmvnic_get_strings, 2561 .get_sset_count = ibmvnic_get_sset_count, 2562 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2563 .get_link_ksettings = ibmvnic_get_link_ksettings, 2564 .get_priv_flags = ibmvnic_get_priv_flags, 2565 .set_priv_flags = ibmvnic_set_priv_flags, 2566 }; 2567 2568 /* Routines for managing CRQs/sCRQs */ 2569 2570 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2571 struct ibmvnic_sub_crq_queue *scrq) 2572 { 2573 int rc; 2574 2575 if (scrq->irq) { 2576 free_irq(scrq->irq, scrq); 2577 irq_dispose_mapping(scrq->irq); 2578 scrq->irq = 0; 2579 } 2580 2581 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2582 atomic_set(&scrq->used, 0); 2583 scrq->cur = 0; 2584 2585 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2586 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2587 return rc; 2588 } 2589 2590 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2591 { 2592 int i, rc; 2593 2594 for (i = 0; i < adapter->req_tx_queues; i++) { 2595 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2596 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2597 if (rc) 2598 return rc; 2599 } 2600 2601 for (i = 0; i < adapter->req_rx_queues; i++) { 2602 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2603 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2604 if (rc) 2605 return rc; 2606 } 2607 2608 return rc; 2609 } 2610 2611 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2612 struct ibmvnic_sub_crq_queue *scrq, 2613 bool do_h_free) 2614 { 2615 struct device *dev = &adapter->vdev->dev; 2616 long rc; 2617 2618 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2619 2620 if (do_h_free) { 2621 /* Close the sub-crqs */ 2622 do { 2623 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2624 adapter->vdev->unit_address, 2625 scrq->crq_num); 2626 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2627 2628 if (rc) { 2629 netdev_err(adapter->netdev, 2630 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2631 scrq->crq_num, rc); 2632 } 2633 } 2634 2635 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2636 DMA_BIDIRECTIONAL); 2637 free_pages((unsigned long)scrq->msgs, 2); 2638 kfree(scrq); 2639 } 2640 2641 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2642 *adapter) 2643 { 2644 struct device *dev = &adapter->vdev->dev; 2645 struct ibmvnic_sub_crq_queue *scrq; 2646 int rc; 2647 2648 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2649 if (!scrq) 2650 return NULL; 2651 2652 scrq->msgs = 2653 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2654 if (!scrq->msgs) { 2655 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2656 goto zero_page_failed; 2657 } 2658 2659 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2660 DMA_BIDIRECTIONAL); 2661 if (dma_mapping_error(dev, scrq->msg_token)) { 2662 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2663 goto map_failed; 2664 } 2665 2666 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2667 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2668 2669 if (rc == H_RESOURCE) 2670 rc = ibmvnic_reset_crq(adapter); 2671 2672 if (rc == H_CLOSED) { 2673 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2674 } else if (rc) { 2675 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2676 goto reg_failed; 2677 } 2678 2679 scrq->adapter = adapter; 2680 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2681 spin_lock_init(&scrq->lock); 2682 2683 netdev_dbg(adapter->netdev, 2684 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2685 scrq->crq_num, scrq->hw_irq, scrq->irq); 2686 2687 return scrq; 2688 2689 reg_failed: 2690 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2691 DMA_BIDIRECTIONAL); 2692 map_failed: 2693 free_pages((unsigned long)scrq->msgs, 2); 2694 zero_page_failed: 2695 kfree(scrq); 2696 2697 return NULL; 2698 } 2699 2700 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2701 { 2702 int i; 2703 2704 if (adapter->tx_scrq) { 2705 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2706 if (!adapter->tx_scrq[i]) 2707 continue; 2708 2709 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2710 i); 2711 if (adapter->tx_scrq[i]->irq) { 2712 free_irq(adapter->tx_scrq[i]->irq, 2713 adapter->tx_scrq[i]); 2714 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2715 adapter->tx_scrq[i]->irq = 0; 2716 } 2717 2718 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2719 do_h_free); 2720 } 2721 2722 kfree(adapter->tx_scrq); 2723 adapter->tx_scrq = NULL; 2724 adapter->num_active_tx_scrqs = 0; 2725 } 2726 2727 if (adapter->rx_scrq) { 2728 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2729 if (!adapter->rx_scrq[i]) 2730 continue; 2731 2732 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2733 i); 2734 if (adapter->rx_scrq[i]->irq) { 2735 free_irq(adapter->rx_scrq[i]->irq, 2736 adapter->rx_scrq[i]); 2737 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2738 adapter->rx_scrq[i]->irq = 0; 2739 } 2740 2741 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2742 do_h_free); 2743 } 2744 2745 kfree(adapter->rx_scrq); 2746 adapter->rx_scrq = NULL; 2747 adapter->num_active_rx_scrqs = 0; 2748 } 2749 } 2750 2751 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2752 struct ibmvnic_sub_crq_queue *scrq) 2753 { 2754 struct device *dev = &adapter->vdev->dev; 2755 unsigned long rc; 2756 2757 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2758 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2759 if (rc) 2760 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2761 scrq->hw_irq, rc); 2762 return rc; 2763 } 2764 2765 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2766 struct ibmvnic_sub_crq_queue *scrq) 2767 { 2768 struct device *dev = &adapter->vdev->dev; 2769 unsigned long rc; 2770 2771 if (scrq->hw_irq > 0x100000000ULL) { 2772 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2773 return 1; 2774 } 2775 2776 if (adapter->resetting && 2777 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2778 u64 val = (0xff000000) | scrq->hw_irq; 2779 2780 rc = plpar_hcall_norets(H_EOI, val); 2781 if (rc) 2782 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2783 val, rc); 2784 } 2785 2786 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2787 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2788 if (rc) 2789 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2790 scrq->hw_irq, rc); 2791 return rc; 2792 } 2793 2794 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2795 struct ibmvnic_sub_crq_queue *scrq) 2796 { 2797 struct device *dev = &adapter->vdev->dev; 2798 struct ibmvnic_tx_pool *tx_pool; 2799 struct ibmvnic_tx_buff *txbuff; 2800 union sub_crq *next; 2801 int index; 2802 int i, j; 2803 u8 *first; 2804 2805 restart_loop: 2806 while (pending_scrq(adapter, scrq)) { 2807 unsigned int pool = scrq->pool_index; 2808 int num_entries = 0; 2809 2810 next = ibmvnic_next_scrq(adapter, scrq); 2811 for (i = 0; i < next->tx_comp.num_comps; i++) { 2812 if (next->tx_comp.rcs[i]) { 2813 dev_err(dev, "tx error %x\n", 2814 next->tx_comp.rcs[i]); 2815 continue; 2816 } 2817 index = be32_to_cpu(next->tx_comp.correlators[i]); 2818 if (index & IBMVNIC_TSO_POOL_MASK) { 2819 tx_pool = &adapter->tso_pool[pool]; 2820 index &= ~IBMVNIC_TSO_POOL_MASK; 2821 } else { 2822 tx_pool = &adapter->tx_pool[pool]; 2823 } 2824 2825 txbuff = &tx_pool->tx_buff[index]; 2826 2827 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2828 if (!txbuff->data_dma[j]) 2829 continue; 2830 2831 txbuff->data_dma[j] = 0; 2832 } 2833 /* if sub_crq was sent indirectly */ 2834 first = &txbuff->indir_arr[0].generic.first; 2835 if (*first == IBMVNIC_CRQ_CMD) { 2836 dma_unmap_single(dev, txbuff->indir_dma, 2837 sizeof(txbuff->indir_arr), 2838 DMA_TO_DEVICE); 2839 *first = 0; 2840 } 2841 2842 if (txbuff->last_frag) { 2843 dev_kfree_skb_any(txbuff->skb); 2844 txbuff->skb = NULL; 2845 } 2846 2847 num_entries += txbuff->num_entries; 2848 2849 tx_pool->free_map[tx_pool->producer_index] = index; 2850 tx_pool->producer_index = 2851 (tx_pool->producer_index + 1) % 2852 tx_pool->num_buffers; 2853 } 2854 /* remove tx_comp scrq*/ 2855 next->tx_comp.first = 0; 2856 2857 if (atomic_sub_return(num_entries, &scrq->used) <= 2858 (adapter->req_tx_entries_per_subcrq / 2) && 2859 __netif_subqueue_stopped(adapter->netdev, 2860 scrq->pool_index)) { 2861 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2862 netdev_dbg(adapter->netdev, "Started queue %d\n", 2863 scrq->pool_index); 2864 } 2865 } 2866 2867 enable_scrq_irq(adapter, scrq); 2868 2869 if (pending_scrq(adapter, scrq)) { 2870 disable_scrq_irq(adapter, scrq); 2871 goto restart_loop; 2872 } 2873 2874 return 0; 2875 } 2876 2877 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2878 { 2879 struct ibmvnic_sub_crq_queue *scrq = instance; 2880 struct ibmvnic_adapter *adapter = scrq->adapter; 2881 2882 disable_scrq_irq(adapter, scrq); 2883 ibmvnic_complete_tx(adapter, scrq); 2884 2885 return IRQ_HANDLED; 2886 } 2887 2888 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2889 { 2890 struct ibmvnic_sub_crq_queue *scrq = instance; 2891 struct ibmvnic_adapter *adapter = scrq->adapter; 2892 2893 /* When booting a kdump kernel we can hit pending interrupts 2894 * prior to completing driver initialization. 2895 */ 2896 if (unlikely(adapter->state != VNIC_OPEN)) 2897 return IRQ_NONE; 2898 2899 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2900 2901 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2902 disable_scrq_irq(adapter, scrq); 2903 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2904 } 2905 2906 return IRQ_HANDLED; 2907 } 2908 2909 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2910 { 2911 struct device *dev = &adapter->vdev->dev; 2912 struct ibmvnic_sub_crq_queue *scrq; 2913 int i = 0, j = 0; 2914 int rc = 0; 2915 2916 for (i = 0; i < adapter->req_tx_queues; i++) { 2917 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2918 i); 2919 scrq = adapter->tx_scrq[i]; 2920 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2921 2922 if (!scrq->irq) { 2923 rc = -EINVAL; 2924 dev_err(dev, "Error mapping irq\n"); 2925 goto req_tx_irq_failed; 2926 } 2927 2928 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2929 0, "ibmvnic_tx", scrq); 2930 2931 if (rc) { 2932 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2933 scrq->irq, rc); 2934 irq_dispose_mapping(scrq->irq); 2935 goto req_tx_irq_failed; 2936 } 2937 } 2938 2939 for (i = 0; i < adapter->req_rx_queues; i++) { 2940 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2941 i); 2942 scrq = adapter->rx_scrq[i]; 2943 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2944 if (!scrq->irq) { 2945 rc = -EINVAL; 2946 dev_err(dev, "Error mapping irq\n"); 2947 goto req_rx_irq_failed; 2948 } 2949 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2950 0, "ibmvnic_rx", scrq); 2951 if (rc) { 2952 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2953 scrq->irq, rc); 2954 irq_dispose_mapping(scrq->irq); 2955 goto req_rx_irq_failed; 2956 } 2957 } 2958 return rc; 2959 2960 req_rx_irq_failed: 2961 for (j = 0; j < i; j++) { 2962 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2963 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2964 } 2965 i = adapter->req_tx_queues; 2966 req_tx_irq_failed: 2967 for (j = 0; j < i; j++) { 2968 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2969 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2970 } 2971 release_sub_crqs(adapter, 1); 2972 return rc; 2973 } 2974 2975 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2976 { 2977 struct device *dev = &adapter->vdev->dev; 2978 struct ibmvnic_sub_crq_queue **allqueues; 2979 int registered_queues = 0; 2980 int total_queues; 2981 int more = 0; 2982 int i; 2983 2984 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2985 2986 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2987 if (!allqueues) 2988 return -1; 2989 2990 for (i = 0; i < total_queues; i++) { 2991 allqueues[i] = init_sub_crq_queue(adapter); 2992 if (!allqueues[i]) { 2993 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2994 break; 2995 } 2996 registered_queues++; 2997 } 2998 2999 /* Make sure we were able to register the minimum number of queues */ 3000 if (registered_queues < 3001 adapter->min_tx_queues + adapter->min_rx_queues) { 3002 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3003 goto tx_failed; 3004 } 3005 3006 /* Distribute the failed allocated queues*/ 3007 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3008 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3009 switch (i % 3) { 3010 case 0: 3011 if (adapter->req_rx_queues > adapter->min_rx_queues) 3012 adapter->req_rx_queues--; 3013 else 3014 more++; 3015 break; 3016 case 1: 3017 if (adapter->req_tx_queues > adapter->min_tx_queues) 3018 adapter->req_tx_queues--; 3019 else 3020 more++; 3021 break; 3022 } 3023 } 3024 3025 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3026 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3027 if (!adapter->tx_scrq) 3028 goto tx_failed; 3029 3030 for (i = 0; i < adapter->req_tx_queues; i++) { 3031 adapter->tx_scrq[i] = allqueues[i]; 3032 adapter->tx_scrq[i]->pool_index = i; 3033 adapter->num_active_tx_scrqs++; 3034 } 3035 3036 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3037 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3038 if (!adapter->rx_scrq) 3039 goto rx_failed; 3040 3041 for (i = 0; i < adapter->req_rx_queues; i++) { 3042 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3043 adapter->rx_scrq[i]->scrq_num = i; 3044 adapter->num_active_rx_scrqs++; 3045 } 3046 3047 kfree(allqueues); 3048 return 0; 3049 3050 rx_failed: 3051 kfree(adapter->tx_scrq); 3052 adapter->tx_scrq = NULL; 3053 tx_failed: 3054 for (i = 0; i < registered_queues; i++) 3055 release_sub_crq_queue(adapter, allqueues[i], 1); 3056 kfree(allqueues); 3057 return -1; 3058 } 3059 3060 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3061 { 3062 struct device *dev = &adapter->vdev->dev; 3063 union ibmvnic_crq crq; 3064 int max_entries; 3065 3066 if (!retry) { 3067 /* Sub-CRQ entries are 32 byte long */ 3068 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3069 3070 if (adapter->min_tx_entries_per_subcrq > entries_page || 3071 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3072 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3073 return; 3074 } 3075 3076 if (adapter->desired.mtu) 3077 adapter->req_mtu = adapter->desired.mtu; 3078 else 3079 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3080 3081 if (!adapter->desired.tx_entries) 3082 adapter->desired.tx_entries = 3083 adapter->max_tx_entries_per_subcrq; 3084 if (!adapter->desired.rx_entries) 3085 adapter->desired.rx_entries = 3086 adapter->max_rx_add_entries_per_subcrq; 3087 3088 max_entries = IBMVNIC_MAX_LTB_SIZE / 3089 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3090 3091 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3092 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3093 adapter->desired.tx_entries = max_entries; 3094 } 3095 3096 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3097 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3098 adapter->desired.rx_entries = max_entries; 3099 } 3100 3101 if (adapter->desired.tx_entries) 3102 adapter->req_tx_entries_per_subcrq = 3103 adapter->desired.tx_entries; 3104 else 3105 adapter->req_tx_entries_per_subcrq = 3106 adapter->max_tx_entries_per_subcrq; 3107 3108 if (adapter->desired.rx_entries) 3109 adapter->req_rx_add_entries_per_subcrq = 3110 adapter->desired.rx_entries; 3111 else 3112 adapter->req_rx_add_entries_per_subcrq = 3113 adapter->max_rx_add_entries_per_subcrq; 3114 3115 if (adapter->desired.tx_queues) 3116 adapter->req_tx_queues = 3117 adapter->desired.tx_queues; 3118 else 3119 adapter->req_tx_queues = 3120 adapter->opt_tx_comp_sub_queues; 3121 3122 if (adapter->desired.rx_queues) 3123 adapter->req_rx_queues = 3124 adapter->desired.rx_queues; 3125 else 3126 adapter->req_rx_queues = 3127 adapter->opt_rx_comp_queues; 3128 3129 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3130 } 3131 3132 memset(&crq, 0, sizeof(crq)); 3133 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3134 crq.request_capability.cmd = REQUEST_CAPABILITY; 3135 3136 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3137 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3138 atomic_inc(&adapter->running_cap_crqs); 3139 ibmvnic_send_crq(adapter, &crq); 3140 3141 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3142 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3143 atomic_inc(&adapter->running_cap_crqs); 3144 ibmvnic_send_crq(adapter, &crq); 3145 3146 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3147 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3148 atomic_inc(&adapter->running_cap_crqs); 3149 ibmvnic_send_crq(adapter, &crq); 3150 3151 crq.request_capability.capability = 3152 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3153 crq.request_capability.number = 3154 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3155 atomic_inc(&adapter->running_cap_crqs); 3156 ibmvnic_send_crq(adapter, &crq); 3157 3158 crq.request_capability.capability = 3159 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3160 crq.request_capability.number = 3161 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3162 atomic_inc(&adapter->running_cap_crqs); 3163 ibmvnic_send_crq(adapter, &crq); 3164 3165 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3166 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3167 atomic_inc(&adapter->running_cap_crqs); 3168 ibmvnic_send_crq(adapter, &crq); 3169 3170 if (adapter->netdev->flags & IFF_PROMISC) { 3171 if (adapter->promisc_supported) { 3172 crq.request_capability.capability = 3173 cpu_to_be16(PROMISC_REQUESTED); 3174 crq.request_capability.number = cpu_to_be64(1); 3175 atomic_inc(&adapter->running_cap_crqs); 3176 ibmvnic_send_crq(adapter, &crq); 3177 } 3178 } else { 3179 crq.request_capability.capability = 3180 cpu_to_be16(PROMISC_REQUESTED); 3181 crq.request_capability.number = cpu_to_be64(0); 3182 atomic_inc(&adapter->running_cap_crqs); 3183 ibmvnic_send_crq(adapter, &crq); 3184 } 3185 } 3186 3187 static int pending_scrq(struct ibmvnic_adapter *adapter, 3188 struct ibmvnic_sub_crq_queue *scrq) 3189 { 3190 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3191 3192 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3193 return 1; 3194 else 3195 return 0; 3196 } 3197 3198 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3199 struct ibmvnic_sub_crq_queue *scrq) 3200 { 3201 union sub_crq *entry; 3202 unsigned long flags; 3203 3204 spin_lock_irqsave(&scrq->lock, flags); 3205 entry = &scrq->msgs[scrq->cur]; 3206 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3207 if (++scrq->cur == scrq->size) 3208 scrq->cur = 0; 3209 } else { 3210 entry = NULL; 3211 } 3212 spin_unlock_irqrestore(&scrq->lock, flags); 3213 3214 return entry; 3215 } 3216 3217 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3218 { 3219 struct ibmvnic_crq_queue *queue = &adapter->crq; 3220 union ibmvnic_crq *crq; 3221 3222 crq = &queue->msgs[queue->cur]; 3223 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3224 if (++queue->cur == queue->size) 3225 queue->cur = 0; 3226 } else { 3227 crq = NULL; 3228 } 3229 3230 return crq; 3231 } 3232 3233 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3234 { 3235 switch (rc) { 3236 case H_PARAMETER: 3237 dev_warn_ratelimited(dev, 3238 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3239 func, rc); 3240 break; 3241 case H_CLOSED: 3242 dev_warn_ratelimited(dev, 3243 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3244 func, rc); 3245 break; 3246 default: 3247 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3248 break; 3249 } 3250 } 3251 3252 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3253 union sub_crq *sub_crq) 3254 { 3255 unsigned int ua = adapter->vdev->unit_address; 3256 struct device *dev = &adapter->vdev->dev; 3257 u64 *u64_crq = (u64 *)sub_crq; 3258 int rc; 3259 3260 netdev_dbg(adapter->netdev, 3261 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3262 (unsigned long int)cpu_to_be64(remote_handle), 3263 (unsigned long int)cpu_to_be64(u64_crq[0]), 3264 (unsigned long int)cpu_to_be64(u64_crq[1]), 3265 (unsigned long int)cpu_to_be64(u64_crq[2]), 3266 (unsigned long int)cpu_to_be64(u64_crq[3])); 3267 3268 /* Make sure the hypervisor sees the complete request */ 3269 mb(); 3270 3271 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3272 cpu_to_be64(remote_handle), 3273 cpu_to_be64(u64_crq[0]), 3274 cpu_to_be64(u64_crq[1]), 3275 cpu_to_be64(u64_crq[2]), 3276 cpu_to_be64(u64_crq[3])); 3277 3278 if (rc) 3279 print_subcrq_error(dev, rc, __func__); 3280 3281 return rc; 3282 } 3283 3284 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3285 u64 remote_handle, u64 ioba, u64 num_entries) 3286 { 3287 unsigned int ua = adapter->vdev->unit_address; 3288 struct device *dev = &adapter->vdev->dev; 3289 int rc; 3290 3291 /* Make sure the hypervisor sees the complete request */ 3292 mb(); 3293 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3294 cpu_to_be64(remote_handle), 3295 ioba, num_entries); 3296 3297 if (rc) 3298 print_subcrq_error(dev, rc, __func__); 3299 3300 return rc; 3301 } 3302 3303 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3304 union ibmvnic_crq *crq) 3305 { 3306 unsigned int ua = adapter->vdev->unit_address; 3307 struct device *dev = &adapter->vdev->dev; 3308 u64 *u64_crq = (u64 *)crq; 3309 int rc; 3310 3311 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3312 (unsigned long int)cpu_to_be64(u64_crq[0]), 3313 (unsigned long int)cpu_to_be64(u64_crq[1])); 3314 3315 if (!adapter->crq.active && 3316 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3317 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3318 return -EINVAL; 3319 } 3320 3321 /* Make sure the hypervisor sees the complete request */ 3322 mb(); 3323 3324 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3325 cpu_to_be64(u64_crq[0]), 3326 cpu_to_be64(u64_crq[1])); 3327 3328 if (rc) { 3329 if (rc == H_CLOSED) { 3330 dev_warn(dev, "CRQ Queue closed\n"); 3331 if (adapter->resetting) 3332 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3333 } 3334 3335 dev_warn(dev, "Send error (rc=%d)\n", rc); 3336 } 3337 3338 return rc; 3339 } 3340 3341 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3342 { 3343 union ibmvnic_crq crq; 3344 3345 memset(&crq, 0, sizeof(crq)); 3346 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3347 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3348 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3349 3350 return ibmvnic_send_crq(adapter, &crq); 3351 } 3352 3353 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3354 { 3355 union ibmvnic_crq crq; 3356 3357 memset(&crq, 0, sizeof(crq)); 3358 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3359 crq.version_exchange.cmd = VERSION_EXCHANGE; 3360 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3361 3362 return ibmvnic_send_crq(adapter, &crq); 3363 } 3364 3365 struct vnic_login_client_data { 3366 u8 type; 3367 __be16 len; 3368 char name[]; 3369 } __packed; 3370 3371 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3372 { 3373 int len; 3374 3375 /* Calculate the amount of buffer space needed for the 3376 * vnic client data in the login buffer. There are four entries, 3377 * OS name, LPAR name, device name, and a null last entry. 3378 */ 3379 len = 4 * sizeof(struct vnic_login_client_data); 3380 len += 6; /* "Linux" plus NULL */ 3381 len += strlen(utsname()->nodename) + 1; 3382 len += strlen(adapter->netdev->name) + 1; 3383 3384 return len; 3385 } 3386 3387 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3388 struct vnic_login_client_data *vlcd) 3389 { 3390 const char *os_name = "Linux"; 3391 int len; 3392 3393 /* Type 1 - LPAR OS */ 3394 vlcd->type = 1; 3395 len = strlen(os_name) + 1; 3396 vlcd->len = cpu_to_be16(len); 3397 strncpy(vlcd->name, os_name, len); 3398 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3399 3400 /* Type 2 - LPAR name */ 3401 vlcd->type = 2; 3402 len = strlen(utsname()->nodename) + 1; 3403 vlcd->len = cpu_to_be16(len); 3404 strncpy(vlcd->name, utsname()->nodename, len); 3405 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3406 3407 /* Type 3 - device name */ 3408 vlcd->type = 3; 3409 len = strlen(adapter->netdev->name) + 1; 3410 vlcd->len = cpu_to_be16(len); 3411 strncpy(vlcd->name, adapter->netdev->name, len); 3412 } 3413 3414 static int send_login(struct ibmvnic_adapter *adapter) 3415 { 3416 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3417 struct ibmvnic_login_buffer *login_buffer; 3418 struct device *dev = &adapter->vdev->dev; 3419 dma_addr_t rsp_buffer_token; 3420 dma_addr_t buffer_token; 3421 size_t rsp_buffer_size; 3422 union ibmvnic_crq crq; 3423 size_t buffer_size; 3424 __be64 *tx_list_p; 3425 __be64 *rx_list_p; 3426 int client_data_len; 3427 struct vnic_login_client_data *vlcd; 3428 int i; 3429 3430 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3431 netdev_err(adapter->netdev, 3432 "RX or TX queues are not allocated, device login failed\n"); 3433 return -1; 3434 } 3435 3436 release_login_rsp_buffer(adapter); 3437 client_data_len = vnic_client_data_len(adapter); 3438 3439 buffer_size = 3440 sizeof(struct ibmvnic_login_buffer) + 3441 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3442 client_data_len; 3443 3444 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3445 if (!login_buffer) 3446 goto buf_alloc_failed; 3447 3448 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3449 DMA_TO_DEVICE); 3450 if (dma_mapping_error(dev, buffer_token)) { 3451 dev_err(dev, "Couldn't map login buffer\n"); 3452 goto buf_map_failed; 3453 } 3454 3455 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3456 sizeof(u64) * adapter->req_tx_queues + 3457 sizeof(u64) * adapter->req_rx_queues + 3458 sizeof(u64) * adapter->req_rx_queues + 3459 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3460 3461 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3462 if (!login_rsp_buffer) 3463 goto buf_rsp_alloc_failed; 3464 3465 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3466 rsp_buffer_size, DMA_FROM_DEVICE); 3467 if (dma_mapping_error(dev, rsp_buffer_token)) { 3468 dev_err(dev, "Couldn't map login rsp buffer\n"); 3469 goto buf_rsp_map_failed; 3470 } 3471 3472 adapter->login_buf = login_buffer; 3473 adapter->login_buf_token = buffer_token; 3474 adapter->login_buf_sz = buffer_size; 3475 adapter->login_rsp_buf = login_rsp_buffer; 3476 adapter->login_rsp_buf_token = rsp_buffer_token; 3477 adapter->login_rsp_buf_sz = rsp_buffer_size; 3478 3479 login_buffer->len = cpu_to_be32(buffer_size); 3480 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3481 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3482 login_buffer->off_txcomp_subcrqs = 3483 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3484 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3485 login_buffer->off_rxcomp_subcrqs = 3486 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3487 sizeof(u64) * adapter->req_tx_queues); 3488 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3489 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3490 3491 tx_list_p = (__be64 *)((char *)login_buffer + 3492 sizeof(struct ibmvnic_login_buffer)); 3493 rx_list_p = (__be64 *)((char *)login_buffer + 3494 sizeof(struct ibmvnic_login_buffer) + 3495 sizeof(u64) * adapter->req_tx_queues); 3496 3497 for (i = 0; i < adapter->req_tx_queues; i++) { 3498 if (adapter->tx_scrq[i]) { 3499 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3500 crq_num); 3501 } 3502 } 3503 3504 for (i = 0; i < adapter->req_rx_queues; i++) { 3505 if (adapter->rx_scrq[i]) { 3506 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3507 crq_num); 3508 } 3509 } 3510 3511 /* Insert vNIC login client data */ 3512 vlcd = (struct vnic_login_client_data *) 3513 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3514 login_buffer->client_data_offset = 3515 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3516 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3517 3518 vnic_add_client_data(adapter, vlcd); 3519 3520 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3521 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3522 netdev_dbg(adapter->netdev, "%016lx\n", 3523 ((unsigned long int *)(adapter->login_buf))[i]); 3524 } 3525 3526 memset(&crq, 0, sizeof(crq)); 3527 crq.login.first = IBMVNIC_CRQ_CMD; 3528 crq.login.cmd = LOGIN; 3529 crq.login.ioba = cpu_to_be32(buffer_token); 3530 crq.login.len = cpu_to_be32(buffer_size); 3531 ibmvnic_send_crq(adapter, &crq); 3532 3533 return 0; 3534 3535 buf_rsp_map_failed: 3536 kfree(login_rsp_buffer); 3537 buf_rsp_alloc_failed: 3538 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3539 buf_map_failed: 3540 kfree(login_buffer); 3541 buf_alloc_failed: 3542 return -1; 3543 } 3544 3545 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3546 u32 len, u8 map_id) 3547 { 3548 union ibmvnic_crq crq; 3549 3550 memset(&crq, 0, sizeof(crq)); 3551 crq.request_map.first = IBMVNIC_CRQ_CMD; 3552 crq.request_map.cmd = REQUEST_MAP; 3553 crq.request_map.map_id = map_id; 3554 crq.request_map.ioba = cpu_to_be32(addr); 3555 crq.request_map.len = cpu_to_be32(len); 3556 return ibmvnic_send_crq(adapter, &crq); 3557 } 3558 3559 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3560 { 3561 union ibmvnic_crq crq; 3562 3563 memset(&crq, 0, sizeof(crq)); 3564 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3565 crq.request_unmap.cmd = REQUEST_UNMAP; 3566 crq.request_unmap.map_id = map_id; 3567 return ibmvnic_send_crq(adapter, &crq); 3568 } 3569 3570 static void send_map_query(struct ibmvnic_adapter *adapter) 3571 { 3572 union ibmvnic_crq crq; 3573 3574 memset(&crq, 0, sizeof(crq)); 3575 crq.query_map.first = IBMVNIC_CRQ_CMD; 3576 crq.query_map.cmd = QUERY_MAP; 3577 ibmvnic_send_crq(adapter, &crq); 3578 } 3579 3580 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3581 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3582 { 3583 union ibmvnic_crq crq; 3584 3585 atomic_set(&adapter->running_cap_crqs, 0); 3586 memset(&crq, 0, sizeof(crq)); 3587 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3588 crq.query_capability.cmd = QUERY_CAPABILITY; 3589 3590 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3591 atomic_inc(&adapter->running_cap_crqs); 3592 ibmvnic_send_crq(adapter, &crq); 3593 3594 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3595 atomic_inc(&adapter->running_cap_crqs); 3596 ibmvnic_send_crq(adapter, &crq); 3597 3598 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3599 atomic_inc(&adapter->running_cap_crqs); 3600 ibmvnic_send_crq(adapter, &crq); 3601 3602 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3603 atomic_inc(&adapter->running_cap_crqs); 3604 ibmvnic_send_crq(adapter, &crq); 3605 3606 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3607 atomic_inc(&adapter->running_cap_crqs); 3608 ibmvnic_send_crq(adapter, &crq); 3609 3610 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3611 atomic_inc(&adapter->running_cap_crqs); 3612 ibmvnic_send_crq(adapter, &crq); 3613 3614 crq.query_capability.capability = 3615 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3616 atomic_inc(&adapter->running_cap_crqs); 3617 ibmvnic_send_crq(adapter, &crq); 3618 3619 crq.query_capability.capability = 3620 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3621 atomic_inc(&adapter->running_cap_crqs); 3622 ibmvnic_send_crq(adapter, &crq); 3623 3624 crq.query_capability.capability = 3625 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3626 atomic_inc(&adapter->running_cap_crqs); 3627 ibmvnic_send_crq(adapter, &crq); 3628 3629 crq.query_capability.capability = 3630 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3631 atomic_inc(&adapter->running_cap_crqs); 3632 ibmvnic_send_crq(adapter, &crq); 3633 3634 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3635 atomic_inc(&adapter->running_cap_crqs); 3636 ibmvnic_send_crq(adapter, &crq); 3637 3638 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3639 atomic_inc(&adapter->running_cap_crqs); 3640 ibmvnic_send_crq(adapter, &crq); 3641 3642 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3643 atomic_inc(&adapter->running_cap_crqs); 3644 ibmvnic_send_crq(adapter, &crq); 3645 3646 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3647 atomic_inc(&adapter->running_cap_crqs); 3648 ibmvnic_send_crq(adapter, &crq); 3649 3650 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3651 atomic_inc(&adapter->running_cap_crqs); 3652 ibmvnic_send_crq(adapter, &crq); 3653 3654 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3655 atomic_inc(&adapter->running_cap_crqs); 3656 ibmvnic_send_crq(adapter, &crq); 3657 3658 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3659 atomic_inc(&adapter->running_cap_crqs); 3660 ibmvnic_send_crq(adapter, &crq); 3661 3662 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3663 atomic_inc(&adapter->running_cap_crqs); 3664 ibmvnic_send_crq(adapter, &crq); 3665 3666 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3667 atomic_inc(&adapter->running_cap_crqs); 3668 ibmvnic_send_crq(adapter, &crq); 3669 3670 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3671 atomic_inc(&adapter->running_cap_crqs); 3672 ibmvnic_send_crq(adapter, &crq); 3673 3674 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3675 atomic_inc(&adapter->running_cap_crqs); 3676 ibmvnic_send_crq(adapter, &crq); 3677 3678 crq.query_capability.capability = 3679 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3680 atomic_inc(&adapter->running_cap_crqs); 3681 ibmvnic_send_crq(adapter, &crq); 3682 3683 crq.query_capability.capability = 3684 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3685 atomic_inc(&adapter->running_cap_crqs); 3686 ibmvnic_send_crq(adapter, &crq); 3687 3688 crq.query_capability.capability = 3689 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3690 atomic_inc(&adapter->running_cap_crqs); 3691 ibmvnic_send_crq(adapter, &crq); 3692 3693 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3694 atomic_inc(&adapter->running_cap_crqs); 3695 ibmvnic_send_crq(adapter, &crq); 3696 } 3697 3698 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3699 struct ibmvnic_adapter *adapter) 3700 { 3701 struct device *dev = &adapter->vdev->dev; 3702 3703 if (crq->get_vpd_size_rsp.rc.code) { 3704 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3705 crq->get_vpd_size_rsp.rc.code); 3706 complete(&adapter->fw_done); 3707 return; 3708 } 3709 3710 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3711 complete(&adapter->fw_done); 3712 } 3713 3714 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3715 struct ibmvnic_adapter *adapter) 3716 { 3717 struct device *dev = &adapter->vdev->dev; 3718 unsigned char *substr = NULL; 3719 u8 fw_level_len = 0; 3720 3721 memset(adapter->fw_version, 0, 32); 3722 3723 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3724 DMA_FROM_DEVICE); 3725 3726 if (crq->get_vpd_rsp.rc.code) { 3727 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3728 crq->get_vpd_rsp.rc.code); 3729 goto complete; 3730 } 3731 3732 /* get the position of the firmware version info 3733 * located after the ASCII 'RM' substring in the buffer 3734 */ 3735 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3736 if (!substr) { 3737 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3738 goto complete; 3739 } 3740 3741 /* get length of firmware level ASCII substring */ 3742 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3743 fw_level_len = *(substr + 2); 3744 } else { 3745 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3746 goto complete; 3747 } 3748 3749 /* copy firmware version string from vpd into adapter */ 3750 if ((substr + 3 + fw_level_len) < 3751 (adapter->vpd->buff + adapter->vpd->len)) { 3752 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3753 } else { 3754 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3755 } 3756 3757 complete: 3758 if (adapter->fw_version[0] == '\0') 3759 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3760 complete(&adapter->fw_done); 3761 } 3762 3763 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3764 { 3765 struct device *dev = &adapter->vdev->dev; 3766 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3767 union ibmvnic_crq crq; 3768 int i; 3769 3770 dma_unmap_single(dev, adapter->ip_offload_tok, 3771 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3772 3773 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3774 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3775 netdev_dbg(adapter->netdev, "%016lx\n", 3776 ((unsigned long int *)(buf))[i]); 3777 3778 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3779 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3780 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3781 buf->tcp_ipv4_chksum); 3782 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3783 buf->tcp_ipv6_chksum); 3784 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3785 buf->udp_ipv4_chksum); 3786 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3787 buf->udp_ipv6_chksum); 3788 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3789 buf->large_tx_ipv4); 3790 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3791 buf->large_tx_ipv6); 3792 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3793 buf->large_rx_ipv4); 3794 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3795 buf->large_rx_ipv6); 3796 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3797 buf->max_ipv4_header_size); 3798 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3799 buf->max_ipv6_header_size); 3800 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3801 buf->max_tcp_header_size); 3802 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3803 buf->max_udp_header_size); 3804 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3805 buf->max_large_tx_size); 3806 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3807 buf->max_large_rx_size); 3808 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3809 buf->ipv6_extension_header); 3810 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3811 buf->tcp_pseudosum_req); 3812 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3813 buf->num_ipv6_ext_headers); 3814 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3815 buf->off_ipv6_ext_headers); 3816 3817 adapter->ip_offload_ctrl_tok = 3818 dma_map_single(dev, &adapter->ip_offload_ctrl, 3819 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3820 3821 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3822 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3823 return; 3824 } 3825 3826 adapter->ip_offload_ctrl.len = 3827 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3828 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3829 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3830 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3831 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3832 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3833 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3834 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3835 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3836 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3837 3838 /* large_rx disabled for now, additional features needed */ 3839 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3840 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3841 3842 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3843 3844 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3845 adapter->netdev->features |= NETIF_F_IP_CSUM; 3846 3847 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3848 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3849 3850 if ((adapter->netdev->features & 3851 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3852 adapter->netdev->features |= NETIF_F_RXCSUM; 3853 3854 if (buf->large_tx_ipv4) 3855 adapter->netdev->features |= NETIF_F_TSO; 3856 if (buf->large_tx_ipv6) 3857 adapter->netdev->features |= NETIF_F_TSO6; 3858 3859 adapter->netdev->hw_features |= adapter->netdev->features; 3860 3861 memset(&crq, 0, sizeof(crq)); 3862 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3863 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3864 crq.control_ip_offload.len = 3865 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3866 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3867 ibmvnic_send_crq(adapter, &crq); 3868 } 3869 3870 static const char *ibmvnic_fw_err_cause(u16 cause) 3871 { 3872 switch (cause) { 3873 case ADAPTER_PROBLEM: 3874 return "adapter problem"; 3875 case BUS_PROBLEM: 3876 return "bus problem"; 3877 case FW_PROBLEM: 3878 return "firmware problem"; 3879 case DD_PROBLEM: 3880 return "device driver problem"; 3881 case EEH_RECOVERY: 3882 return "EEH recovery"; 3883 case FW_UPDATED: 3884 return "firmware updated"; 3885 case LOW_MEMORY: 3886 return "low Memory"; 3887 default: 3888 return "unknown"; 3889 } 3890 } 3891 3892 static void handle_error_indication(union ibmvnic_crq *crq, 3893 struct ibmvnic_adapter *adapter) 3894 { 3895 struct device *dev = &adapter->vdev->dev; 3896 u16 cause; 3897 3898 cause = be16_to_cpu(crq->error_indication.error_cause); 3899 3900 dev_warn_ratelimited(dev, 3901 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3902 crq->error_indication.flags 3903 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3904 ibmvnic_fw_err_cause(cause)); 3905 3906 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3907 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3908 else 3909 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3910 } 3911 3912 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3913 struct ibmvnic_adapter *adapter) 3914 { 3915 struct net_device *netdev = adapter->netdev; 3916 struct device *dev = &adapter->vdev->dev; 3917 long rc; 3918 3919 rc = crq->change_mac_addr_rsp.rc.code; 3920 if (rc) { 3921 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3922 goto out; 3923 } 3924 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3925 ETH_ALEN); 3926 out: 3927 complete(&adapter->fw_done); 3928 return rc; 3929 } 3930 3931 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3932 struct ibmvnic_adapter *adapter) 3933 { 3934 struct device *dev = &adapter->vdev->dev; 3935 u64 *req_value; 3936 char *name; 3937 3938 atomic_dec(&adapter->running_cap_crqs); 3939 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3940 case REQ_TX_QUEUES: 3941 req_value = &adapter->req_tx_queues; 3942 name = "tx"; 3943 break; 3944 case REQ_RX_QUEUES: 3945 req_value = &adapter->req_rx_queues; 3946 name = "rx"; 3947 break; 3948 case REQ_RX_ADD_QUEUES: 3949 req_value = &adapter->req_rx_add_queues; 3950 name = "rx_add"; 3951 break; 3952 case REQ_TX_ENTRIES_PER_SUBCRQ: 3953 req_value = &adapter->req_tx_entries_per_subcrq; 3954 name = "tx_entries_per_subcrq"; 3955 break; 3956 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3957 req_value = &adapter->req_rx_add_entries_per_subcrq; 3958 name = "rx_add_entries_per_subcrq"; 3959 break; 3960 case REQ_MTU: 3961 req_value = &adapter->req_mtu; 3962 name = "mtu"; 3963 break; 3964 case PROMISC_REQUESTED: 3965 req_value = &adapter->promisc; 3966 name = "promisc"; 3967 break; 3968 default: 3969 dev_err(dev, "Got invalid cap request rsp %d\n", 3970 crq->request_capability.capability); 3971 return; 3972 } 3973 3974 switch (crq->request_capability_rsp.rc.code) { 3975 case SUCCESS: 3976 break; 3977 case PARTIALSUCCESS: 3978 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3979 *req_value, 3980 (long int)be64_to_cpu(crq->request_capability_rsp. 3981 number), name); 3982 3983 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3984 REQ_MTU) { 3985 pr_err("mtu of %llu is not supported. Reverting.\n", 3986 *req_value); 3987 *req_value = adapter->fallback.mtu; 3988 } else { 3989 *req_value = 3990 be64_to_cpu(crq->request_capability_rsp.number); 3991 } 3992 3993 ibmvnic_send_req_caps(adapter, 1); 3994 return; 3995 default: 3996 dev_err(dev, "Error %d in request cap rsp\n", 3997 crq->request_capability_rsp.rc.code); 3998 return; 3999 } 4000 4001 /* Done receiving requested capabilities, query IP offload support */ 4002 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4003 union ibmvnic_crq newcrq; 4004 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4005 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4006 &adapter->ip_offload_buf; 4007 4008 adapter->wait_capability = false; 4009 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4010 buf_sz, 4011 DMA_FROM_DEVICE); 4012 4013 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4014 if (!firmware_has_feature(FW_FEATURE_CMO)) 4015 dev_err(dev, "Couldn't map offload buffer\n"); 4016 return; 4017 } 4018 4019 memset(&newcrq, 0, sizeof(newcrq)); 4020 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4021 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4022 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4023 newcrq.query_ip_offload.ioba = 4024 cpu_to_be32(adapter->ip_offload_tok); 4025 4026 ibmvnic_send_crq(adapter, &newcrq); 4027 } 4028 } 4029 4030 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4031 struct ibmvnic_adapter *adapter) 4032 { 4033 struct device *dev = &adapter->vdev->dev; 4034 struct net_device *netdev = adapter->netdev; 4035 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4036 struct ibmvnic_login_buffer *login = adapter->login_buf; 4037 int i; 4038 4039 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4040 DMA_TO_DEVICE); 4041 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4042 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4043 4044 /* If the number of queues requested can't be allocated by the 4045 * server, the login response will return with code 1. We will need 4046 * to resend the login buffer with fewer queues requested. 4047 */ 4048 if (login_rsp_crq->generic.rc.code) { 4049 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4050 complete(&adapter->init_done); 4051 return 0; 4052 } 4053 4054 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4055 4056 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4057 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4058 netdev_dbg(adapter->netdev, "%016lx\n", 4059 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4060 } 4061 4062 /* Sanity checks */ 4063 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4064 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4065 adapter->req_rx_add_queues != 4066 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4067 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4068 ibmvnic_remove(adapter->vdev); 4069 return -EIO; 4070 } 4071 release_login_buffer(adapter); 4072 complete(&adapter->init_done); 4073 4074 return 0; 4075 } 4076 4077 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4078 struct ibmvnic_adapter *adapter) 4079 { 4080 struct device *dev = &adapter->vdev->dev; 4081 long rc; 4082 4083 rc = crq->request_unmap_rsp.rc.code; 4084 if (rc) 4085 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4086 } 4087 4088 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4089 struct ibmvnic_adapter *adapter) 4090 { 4091 struct net_device *netdev = adapter->netdev; 4092 struct device *dev = &adapter->vdev->dev; 4093 long rc; 4094 4095 rc = crq->query_map_rsp.rc.code; 4096 if (rc) { 4097 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4098 return; 4099 } 4100 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4101 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4102 crq->query_map_rsp.free_pages); 4103 } 4104 4105 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4106 struct ibmvnic_adapter *adapter) 4107 { 4108 struct net_device *netdev = adapter->netdev; 4109 struct device *dev = &adapter->vdev->dev; 4110 long rc; 4111 4112 atomic_dec(&adapter->running_cap_crqs); 4113 netdev_dbg(netdev, "Outstanding queries: %d\n", 4114 atomic_read(&adapter->running_cap_crqs)); 4115 rc = crq->query_capability.rc.code; 4116 if (rc) { 4117 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4118 goto out; 4119 } 4120 4121 switch (be16_to_cpu(crq->query_capability.capability)) { 4122 case MIN_TX_QUEUES: 4123 adapter->min_tx_queues = 4124 be64_to_cpu(crq->query_capability.number); 4125 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4126 adapter->min_tx_queues); 4127 break; 4128 case MIN_RX_QUEUES: 4129 adapter->min_rx_queues = 4130 be64_to_cpu(crq->query_capability.number); 4131 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4132 adapter->min_rx_queues); 4133 break; 4134 case MIN_RX_ADD_QUEUES: 4135 adapter->min_rx_add_queues = 4136 be64_to_cpu(crq->query_capability.number); 4137 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4138 adapter->min_rx_add_queues); 4139 break; 4140 case MAX_TX_QUEUES: 4141 adapter->max_tx_queues = 4142 be64_to_cpu(crq->query_capability.number); 4143 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4144 adapter->max_tx_queues); 4145 break; 4146 case MAX_RX_QUEUES: 4147 adapter->max_rx_queues = 4148 be64_to_cpu(crq->query_capability.number); 4149 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4150 adapter->max_rx_queues); 4151 break; 4152 case MAX_RX_ADD_QUEUES: 4153 adapter->max_rx_add_queues = 4154 be64_to_cpu(crq->query_capability.number); 4155 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4156 adapter->max_rx_add_queues); 4157 break; 4158 case MIN_TX_ENTRIES_PER_SUBCRQ: 4159 adapter->min_tx_entries_per_subcrq = 4160 be64_to_cpu(crq->query_capability.number); 4161 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4162 adapter->min_tx_entries_per_subcrq); 4163 break; 4164 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4165 adapter->min_rx_add_entries_per_subcrq = 4166 be64_to_cpu(crq->query_capability.number); 4167 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4168 adapter->min_rx_add_entries_per_subcrq); 4169 break; 4170 case MAX_TX_ENTRIES_PER_SUBCRQ: 4171 adapter->max_tx_entries_per_subcrq = 4172 be64_to_cpu(crq->query_capability.number); 4173 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4174 adapter->max_tx_entries_per_subcrq); 4175 break; 4176 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4177 adapter->max_rx_add_entries_per_subcrq = 4178 be64_to_cpu(crq->query_capability.number); 4179 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4180 adapter->max_rx_add_entries_per_subcrq); 4181 break; 4182 case TCP_IP_OFFLOAD: 4183 adapter->tcp_ip_offload = 4184 be64_to_cpu(crq->query_capability.number); 4185 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4186 adapter->tcp_ip_offload); 4187 break; 4188 case PROMISC_SUPPORTED: 4189 adapter->promisc_supported = 4190 be64_to_cpu(crq->query_capability.number); 4191 netdev_dbg(netdev, "promisc_supported = %lld\n", 4192 adapter->promisc_supported); 4193 break; 4194 case MIN_MTU: 4195 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4196 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4197 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4198 break; 4199 case MAX_MTU: 4200 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4201 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4202 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4203 break; 4204 case MAX_MULTICAST_FILTERS: 4205 adapter->max_multicast_filters = 4206 be64_to_cpu(crq->query_capability.number); 4207 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4208 adapter->max_multicast_filters); 4209 break; 4210 case VLAN_HEADER_INSERTION: 4211 adapter->vlan_header_insertion = 4212 be64_to_cpu(crq->query_capability.number); 4213 if (adapter->vlan_header_insertion) 4214 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4215 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4216 adapter->vlan_header_insertion); 4217 break; 4218 case RX_VLAN_HEADER_INSERTION: 4219 adapter->rx_vlan_header_insertion = 4220 be64_to_cpu(crq->query_capability.number); 4221 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4222 adapter->rx_vlan_header_insertion); 4223 break; 4224 case MAX_TX_SG_ENTRIES: 4225 adapter->max_tx_sg_entries = 4226 be64_to_cpu(crq->query_capability.number); 4227 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4228 adapter->max_tx_sg_entries); 4229 break; 4230 case RX_SG_SUPPORTED: 4231 adapter->rx_sg_supported = 4232 be64_to_cpu(crq->query_capability.number); 4233 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4234 adapter->rx_sg_supported); 4235 break; 4236 case OPT_TX_COMP_SUB_QUEUES: 4237 adapter->opt_tx_comp_sub_queues = 4238 be64_to_cpu(crq->query_capability.number); 4239 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4240 adapter->opt_tx_comp_sub_queues); 4241 break; 4242 case OPT_RX_COMP_QUEUES: 4243 adapter->opt_rx_comp_queues = 4244 be64_to_cpu(crq->query_capability.number); 4245 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4246 adapter->opt_rx_comp_queues); 4247 break; 4248 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4249 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4250 be64_to_cpu(crq->query_capability.number); 4251 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4252 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4253 break; 4254 case OPT_TX_ENTRIES_PER_SUBCRQ: 4255 adapter->opt_tx_entries_per_subcrq = 4256 be64_to_cpu(crq->query_capability.number); 4257 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4258 adapter->opt_tx_entries_per_subcrq); 4259 break; 4260 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4261 adapter->opt_rxba_entries_per_subcrq = 4262 be64_to_cpu(crq->query_capability.number); 4263 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4264 adapter->opt_rxba_entries_per_subcrq); 4265 break; 4266 case TX_RX_DESC_REQ: 4267 adapter->tx_rx_desc_req = crq->query_capability.number; 4268 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4269 adapter->tx_rx_desc_req); 4270 break; 4271 4272 default: 4273 netdev_err(netdev, "Got invalid cap rsp %d\n", 4274 crq->query_capability.capability); 4275 } 4276 4277 out: 4278 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4279 adapter->wait_capability = false; 4280 ibmvnic_send_req_caps(adapter, 0); 4281 } 4282 } 4283 4284 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4285 struct ibmvnic_adapter *adapter) 4286 { 4287 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4288 struct net_device *netdev = adapter->netdev; 4289 struct device *dev = &adapter->vdev->dev; 4290 u64 *u64_crq = (u64 *)crq; 4291 long rc; 4292 4293 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4294 (unsigned long int)cpu_to_be64(u64_crq[0]), 4295 (unsigned long int)cpu_to_be64(u64_crq[1])); 4296 switch (gen_crq->first) { 4297 case IBMVNIC_CRQ_INIT_RSP: 4298 switch (gen_crq->cmd) { 4299 case IBMVNIC_CRQ_INIT: 4300 dev_info(dev, "Partner initialized\n"); 4301 adapter->from_passive_init = true; 4302 adapter->failover_pending = false; 4303 if (!completion_done(&adapter->init_done)) { 4304 complete(&adapter->init_done); 4305 adapter->init_done_rc = -EIO; 4306 } 4307 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4308 break; 4309 case IBMVNIC_CRQ_INIT_COMPLETE: 4310 dev_info(dev, "Partner initialization complete\n"); 4311 adapter->crq.active = true; 4312 send_version_xchg(adapter); 4313 break; 4314 default: 4315 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4316 } 4317 return; 4318 case IBMVNIC_CRQ_XPORT_EVENT: 4319 netif_carrier_off(netdev); 4320 adapter->crq.active = false; 4321 if (adapter->resetting) 4322 adapter->force_reset_recovery = true; 4323 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4324 dev_info(dev, "Migrated, re-enabling adapter\n"); 4325 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4326 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4327 dev_info(dev, "Backing device failover detected\n"); 4328 adapter->failover_pending = true; 4329 } else { 4330 /* The adapter lost the connection */ 4331 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4332 gen_crq->cmd); 4333 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4334 } 4335 return; 4336 case IBMVNIC_CRQ_CMD_RSP: 4337 break; 4338 default: 4339 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4340 gen_crq->first); 4341 return; 4342 } 4343 4344 switch (gen_crq->cmd) { 4345 case VERSION_EXCHANGE_RSP: 4346 rc = crq->version_exchange_rsp.rc.code; 4347 if (rc) { 4348 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4349 break; 4350 } 4351 dev_info(dev, "Partner protocol version is %d\n", 4352 crq->version_exchange_rsp.version); 4353 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4354 ibmvnic_version) 4355 ibmvnic_version = 4356 be16_to_cpu(crq->version_exchange_rsp.version); 4357 send_cap_queries(adapter); 4358 break; 4359 case QUERY_CAPABILITY_RSP: 4360 handle_query_cap_rsp(crq, adapter); 4361 break; 4362 case QUERY_MAP_RSP: 4363 handle_query_map_rsp(crq, adapter); 4364 break; 4365 case REQUEST_MAP_RSP: 4366 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4367 complete(&adapter->fw_done); 4368 break; 4369 case REQUEST_UNMAP_RSP: 4370 handle_request_unmap_rsp(crq, adapter); 4371 break; 4372 case REQUEST_CAPABILITY_RSP: 4373 handle_request_cap_rsp(crq, adapter); 4374 break; 4375 case LOGIN_RSP: 4376 netdev_dbg(netdev, "Got Login Response\n"); 4377 handle_login_rsp(crq, adapter); 4378 break; 4379 case LOGICAL_LINK_STATE_RSP: 4380 netdev_dbg(netdev, 4381 "Got Logical Link State Response, state: %d rc: %d\n", 4382 crq->logical_link_state_rsp.link_state, 4383 crq->logical_link_state_rsp.rc.code); 4384 adapter->logical_link_state = 4385 crq->logical_link_state_rsp.link_state; 4386 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4387 complete(&adapter->init_done); 4388 break; 4389 case LINK_STATE_INDICATION: 4390 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4391 adapter->phys_link_state = 4392 crq->link_state_indication.phys_link_state; 4393 adapter->logical_link_state = 4394 crq->link_state_indication.logical_link_state; 4395 break; 4396 case CHANGE_MAC_ADDR_RSP: 4397 netdev_dbg(netdev, "Got MAC address change Response\n"); 4398 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4399 break; 4400 case ERROR_INDICATION: 4401 netdev_dbg(netdev, "Got Error Indication\n"); 4402 handle_error_indication(crq, adapter); 4403 break; 4404 case REQUEST_STATISTICS_RSP: 4405 netdev_dbg(netdev, "Got Statistics Response\n"); 4406 complete(&adapter->stats_done); 4407 break; 4408 case QUERY_IP_OFFLOAD_RSP: 4409 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4410 handle_query_ip_offload_rsp(adapter); 4411 break; 4412 case MULTICAST_CTRL_RSP: 4413 netdev_dbg(netdev, "Got multicast control Response\n"); 4414 break; 4415 case CONTROL_IP_OFFLOAD_RSP: 4416 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4417 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4418 sizeof(adapter->ip_offload_ctrl), 4419 DMA_TO_DEVICE); 4420 complete(&adapter->init_done); 4421 break; 4422 case COLLECT_FW_TRACE_RSP: 4423 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4424 complete(&adapter->fw_done); 4425 break; 4426 case GET_VPD_SIZE_RSP: 4427 handle_vpd_size_rsp(crq, adapter); 4428 break; 4429 case GET_VPD_RSP: 4430 handle_vpd_rsp(crq, adapter); 4431 break; 4432 default: 4433 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4434 gen_crq->cmd); 4435 } 4436 } 4437 4438 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4439 { 4440 struct ibmvnic_adapter *adapter = instance; 4441 4442 tasklet_schedule(&adapter->tasklet); 4443 return IRQ_HANDLED; 4444 } 4445 4446 static void ibmvnic_tasklet(void *data) 4447 { 4448 struct ibmvnic_adapter *adapter = data; 4449 struct ibmvnic_crq_queue *queue = &adapter->crq; 4450 union ibmvnic_crq *crq; 4451 unsigned long flags; 4452 bool done = false; 4453 4454 spin_lock_irqsave(&queue->lock, flags); 4455 while (!done) { 4456 /* Pull all the valid messages off the CRQ */ 4457 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4458 ibmvnic_handle_crq(crq, adapter); 4459 crq->generic.first = 0; 4460 } 4461 4462 /* remain in tasklet until all 4463 * capabilities responses are received 4464 */ 4465 if (!adapter->wait_capability) 4466 done = true; 4467 } 4468 /* if capabilities CRQ's were sent in this tasklet, the following 4469 * tasklet must wait until all responses are received 4470 */ 4471 if (atomic_read(&adapter->running_cap_crqs) != 0) 4472 adapter->wait_capability = true; 4473 spin_unlock_irqrestore(&queue->lock, flags); 4474 } 4475 4476 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4477 { 4478 struct vio_dev *vdev = adapter->vdev; 4479 int rc; 4480 4481 do { 4482 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4483 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4484 4485 if (rc) 4486 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4487 4488 return rc; 4489 } 4490 4491 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4492 { 4493 struct ibmvnic_crq_queue *crq = &adapter->crq; 4494 struct device *dev = &adapter->vdev->dev; 4495 struct vio_dev *vdev = adapter->vdev; 4496 int rc; 4497 4498 /* Close the CRQ */ 4499 do { 4500 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4501 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4502 4503 /* Clean out the queue */ 4504 memset(crq->msgs, 0, PAGE_SIZE); 4505 crq->cur = 0; 4506 crq->active = false; 4507 4508 /* And re-open it again */ 4509 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4510 crq->msg_token, PAGE_SIZE); 4511 4512 if (rc == H_CLOSED) 4513 /* Adapter is good, but other end is not ready */ 4514 dev_warn(dev, "Partner adapter not ready\n"); 4515 else if (rc != 0) 4516 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4517 4518 return rc; 4519 } 4520 4521 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4522 { 4523 struct ibmvnic_crq_queue *crq = &adapter->crq; 4524 struct vio_dev *vdev = adapter->vdev; 4525 long rc; 4526 4527 if (!crq->msgs) 4528 return; 4529 4530 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4531 free_irq(vdev->irq, adapter); 4532 tasklet_kill(&adapter->tasklet); 4533 do { 4534 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4535 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4536 4537 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4538 DMA_BIDIRECTIONAL); 4539 free_page((unsigned long)crq->msgs); 4540 crq->msgs = NULL; 4541 crq->active = false; 4542 } 4543 4544 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4545 { 4546 struct ibmvnic_crq_queue *crq = &adapter->crq; 4547 struct device *dev = &adapter->vdev->dev; 4548 struct vio_dev *vdev = adapter->vdev; 4549 int rc, retrc = -ENOMEM; 4550 4551 if (crq->msgs) 4552 return 0; 4553 4554 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4555 /* Should we allocate more than one page? */ 4556 4557 if (!crq->msgs) 4558 return -ENOMEM; 4559 4560 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4561 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4562 DMA_BIDIRECTIONAL); 4563 if (dma_mapping_error(dev, crq->msg_token)) 4564 goto map_failed; 4565 4566 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4567 crq->msg_token, PAGE_SIZE); 4568 4569 if (rc == H_RESOURCE) 4570 /* maybe kexecing and resource is busy. try a reset */ 4571 rc = ibmvnic_reset_crq(adapter); 4572 retrc = rc; 4573 4574 if (rc == H_CLOSED) { 4575 dev_warn(dev, "Partner adapter not ready\n"); 4576 } else if (rc) { 4577 dev_warn(dev, "Error %d opening adapter\n", rc); 4578 goto reg_crq_failed; 4579 } 4580 4581 retrc = 0; 4582 4583 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4584 (unsigned long)adapter); 4585 4586 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4587 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4588 adapter); 4589 if (rc) { 4590 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4591 vdev->irq, rc); 4592 goto req_irq_failed; 4593 } 4594 4595 rc = vio_enable_interrupts(vdev); 4596 if (rc) { 4597 dev_err(dev, "Error %d enabling interrupts\n", rc); 4598 goto req_irq_failed; 4599 } 4600 4601 crq->cur = 0; 4602 spin_lock_init(&crq->lock); 4603 4604 return retrc; 4605 4606 req_irq_failed: 4607 tasklet_kill(&adapter->tasklet); 4608 do { 4609 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4610 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4611 reg_crq_failed: 4612 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4613 map_failed: 4614 free_page((unsigned long)crq->msgs); 4615 crq->msgs = NULL; 4616 return retrc; 4617 } 4618 4619 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4620 { 4621 struct device *dev = &adapter->vdev->dev; 4622 unsigned long timeout = msecs_to_jiffies(30000); 4623 u64 old_num_rx_queues, old_num_tx_queues; 4624 int rc; 4625 4626 adapter->from_passive_init = false; 4627 4628 old_num_rx_queues = adapter->req_rx_queues; 4629 old_num_tx_queues = adapter->req_tx_queues; 4630 4631 init_completion(&adapter->init_done); 4632 adapter->init_done_rc = 0; 4633 ibmvnic_send_crq_init(adapter); 4634 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4635 dev_err(dev, "Initialization sequence timed out\n"); 4636 return -1; 4637 } 4638 4639 if (adapter->init_done_rc) { 4640 release_crq_queue(adapter); 4641 return adapter->init_done_rc; 4642 } 4643 4644 if (adapter->from_passive_init) { 4645 adapter->state = VNIC_OPEN; 4646 adapter->from_passive_init = false; 4647 return -1; 4648 } 4649 4650 if (adapter->resetting && !adapter->wait_for_reset && 4651 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4652 if (adapter->req_rx_queues != old_num_rx_queues || 4653 adapter->req_tx_queues != old_num_tx_queues) { 4654 release_sub_crqs(adapter, 0); 4655 rc = init_sub_crqs(adapter); 4656 } else { 4657 rc = reset_sub_crq_queues(adapter); 4658 } 4659 } else { 4660 rc = init_sub_crqs(adapter); 4661 } 4662 4663 if (rc) { 4664 dev_err(dev, "Initialization of sub crqs failed\n"); 4665 release_crq_queue(adapter); 4666 return rc; 4667 } 4668 4669 rc = init_sub_crq_irqs(adapter); 4670 if (rc) { 4671 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4672 release_crq_queue(adapter); 4673 } 4674 4675 return rc; 4676 } 4677 4678 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4679 { 4680 struct device *dev = &adapter->vdev->dev; 4681 unsigned long timeout = msecs_to_jiffies(30000); 4682 int rc; 4683 4684 adapter->from_passive_init = false; 4685 4686 init_completion(&adapter->init_done); 4687 adapter->init_done_rc = 0; 4688 ibmvnic_send_crq_init(adapter); 4689 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4690 dev_err(dev, "Initialization sequence timed out\n"); 4691 return -1; 4692 } 4693 4694 if (adapter->init_done_rc) { 4695 release_crq_queue(adapter); 4696 return adapter->init_done_rc; 4697 } 4698 4699 if (adapter->from_passive_init) { 4700 adapter->state = VNIC_OPEN; 4701 adapter->from_passive_init = false; 4702 return -1; 4703 } 4704 4705 rc = init_sub_crqs(adapter); 4706 if (rc) { 4707 dev_err(dev, "Initialization of sub crqs failed\n"); 4708 release_crq_queue(adapter); 4709 return rc; 4710 } 4711 4712 rc = init_sub_crq_irqs(adapter); 4713 if (rc) { 4714 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4715 release_crq_queue(adapter); 4716 } 4717 4718 return rc; 4719 } 4720 4721 static struct device_attribute dev_attr_failover; 4722 4723 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4724 { 4725 struct ibmvnic_adapter *adapter; 4726 struct net_device *netdev; 4727 unsigned char *mac_addr_p; 4728 int rc; 4729 4730 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4731 dev->unit_address); 4732 4733 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4734 VETH_MAC_ADDR, NULL); 4735 if (!mac_addr_p) { 4736 dev_err(&dev->dev, 4737 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4738 __FILE__, __LINE__); 4739 return 0; 4740 } 4741 4742 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4743 IBMVNIC_MAX_QUEUES); 4744 if (!netdev) 4745 return -ENOMEM; 4746 4747 adapter = netdev_priv(netdev); 4748 adapter->state = VNIC_PROBING; 4749 dev_set_drvdata(&dev->dev, netdev); 4750 adapter->vdev = dev; 4751 adapter->netdev = netdev; 4752 4753 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4754 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4755 netdev->irq = dev->irq; 4756 netdev->netdev_ops = &ibmvnic_netdev_ops; 4757 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4758 SET_NETDEV_DEV(netdev, &dev->dev); 4759 4760 spin_lock_init(&adapter->stats_lock); 4761 4762 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4763 INIT_LIST_HEAD(&adapter->rwi_list); 4764 spin_lock_init(&adapter->rwi_lock); 4765 adapter->resetting = false; 4766 4767 adapter->mac_change_pending = false; 4768 4769 do { 4770 rc = init_crq_queue(adapter); 4771 if (rc) { 4772 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4773 rc); 4774 goto ibmvnic_init_fail; 4775 } 4776 4777 rc = ibmvnic_init(adapter); 4778 if (rc && rc != EAGAIN) 4779 goto ibmvnic_init_fail; 4780 } while (rc == EAGAIN); 4781 4782 rc = init_stats_buffers(adapter); 4783 if (rc) 4784 goto ibmvnic_init_fail; 4785 4786 rc = init_stats_token(adapter); 4787 if (rc) 4788 goto ibmvnic_stats_fail; 4789 4790 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4791 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4792 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4793 4794 rc = device_create_file(&dev->dev, &dev_attr_failover); 4795 if (rc) 4796 goto ibmvnic_dev_file_err; 4797 4798 netif_carrier_off(netdev); 4799 rc = register_netdev(netdev); 4800 if (rc) { 4801 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4802 goto ibmvnic_register_fail; 4803 } 4804 dev_info(&dev->dev, "ibmvnic registered\n"); 4805 4806 adapter->state = VNIC_PROBED; 4807 4808 adapter->wait_for_reset = false; 4809 4810 return 0; 4811 4812 ibmvnic_register_fail: 4813 device_remove_file(&dev->dev, &dev_attr_failover); 4814 4815 ibmvnic_dev_file_err: 4816 release_stats_token(adapter); 4817 4818 ibmvnic_stats_fail: 4819 release_stats_buffers(adapter); 4820 4821 ibmvnic_init_fail: 4822 release_sub_crqs(adapter, 1); 4823 release_crq_queue(adapter); 4824 free_netdev(netdev); 4825 4826 return rc; 4827 } 4828 4829 static int ibmvnic_remove(struct vio_dev *dev) 4830 { 4831 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4832 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4833 4834 adapter->state = VNIC_REMOVING; 4835 rtnl_lock(); 4836 unregister_netdevice(netdev); 4837 4838 release_resources(adapter); 4839 release_sub_crqs(adapter, 1); 4840 release_crq_queue(adapter); 4841 4842 release_stats_token(adapter); 4843 release_stats_buffers(adapter); 4844 4845 adapter->state = VNIC_REMOVED; 4846 4847 rtnl_unlock(); 4848 device_remove_file(&dev->dev, &dev_attr_failover); 4849 free_netdev(netdev); 4850 dev_set_drvdata(&dev->dev, NULL); 4851 4852 return 0; 4853 } 4854 4855 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4856 const char *buf, size_t count) 4857 { 4858 struct net_device *netdev = dev_get_drvdata(dev); 4859 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4860 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4861 __be64 session_token; 4862 long rc; 4863 4864 if (!sysfs_streq(buf, "1")) 4865 return -EINVAL; 4866 4867 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4868 H_GET_SESSION_TOKEN, 0, 0, 0); 4869 if (rc) { 4870 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4871 rc); 4872 return -EINVAL; 4873 } 4874 4875 session_token = (__be64)retbuf[0]; 4876 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4877 be64_to_cpu(session_token)); 4878 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4879 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4880 if (rc) { 4881 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4882 rc); 4883 return -EINVAL; 4884 } 4885 4886 return count; 4887 } 4888 4889 static DEVICE_ATTR_WO(failover); 4890 4891 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4892 { 4893 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4894 struct ibmvnic_adapter *adapter; 4895 struct iommu_table *tbl; 4896 unsigned long ret = 0; 4897 int i; 4898 4899 tbl = get_iommu_table_base(&vdev->dev); 4900 4901 /* netdev inits at probe time along with the structures we need below*/ 4902 if (!netdev) 4903 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4904 4905 adapter = netdev_priv(netdev); 4906 4907 ret += PAGE_SIZE; /* the crq message queue */ 4908 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4909 4910 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4911 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4912 4913 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4914 i++) 4915 ret += adapter->rx_pool[i].size * 4916 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4917 4918 return ret; 4919 } 4920 4921 static int ibmvnic_resume(struct device *dev) 4922 { 4923 struct net_device *netdev = dev_get_drvdata(dev); 4924 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4925 4926 if (adapter->state != VNIC_OPEN) 4927 return 0; 4928 4929 tasklet_schedule(&adapter->tasklet); 4930 4931 return 0; 4932 } 4933 4934 static const struct vio_device_id ibmvnic_device_table[] = { 4935 {"network", "IBM,vnic"}, 4936 {"", "" } 4937 }; 4938 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4939 4940 static const struct dev_pm_ops ibmvnic_pm_ops = { 4941 .resume = ibmvnic_resume 4942 }; 4943 4944 static struct vio_driver ibmvnic_driver = { 4945 .id_table = ibmvnic_device_table, 4946 .probe = ibmvnic_probe, 4947 .remove = ibmvnic_remove, 4948 .get_desired_dma = ibmvnic_get_desired_dma, 4949 .name = ibmvnic_driver_name, 4950 .pm = &ibmvnic_pm_ops, 4951 }; 4952 4953 /* module functions */ 4954 static int __init ibmvnic_module_init(void) 4955 { 4956 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4957 IBMVNIC_DRIVER_VERSION); 4958 4959 return vio_register_driver(&ibmvnic_driver); 4960 } 4961 4962 static void __exit ibmvnic_module_exit(void) 4963 { 4964 vio_unregister_driver(&ibmvnic_driver); 4965 } 4966 4967 module_init(ibmvnic_module_init); 4968 module_exit(ibmvnic_module_exit); 4969