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 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 124 125 struct ibmvnic_stat { 126 char name[ETH_GSTRING_LEN]; 127 int offset; 128 }; 129 130 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 131 offsetof(struct ibmvnic_statistics, stat)) 132 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 133 134 static const struct ibmvnic_stat ibmvnic_stats[] = { 135 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 136 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 137 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 138 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 139 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 140 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 141 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 142 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 143 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 144 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 145 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 146 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 147 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 148 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 149 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 150 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 151 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 152 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 153 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 154 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 155 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 156 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 157 }; 158 159 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 160 unsigned long length, unsigned long *number, 161 unsigned long *irq) 162 { 163 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 164 long rc; 165 166 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 167 *number = retbuf[0]; 168 *irq = retbuf[1]; 169 170 return rc; 171 } 172 173 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 174 struct ibmvnic_long_term_buff *ltb, int size) 175 { 176 struct device *dev = &adapter->vdev->dev; 177 int rc; 178 179 ltb->size = size; 180 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 181 GFP_KERNEL); 182 183 if (!ltb->buff) { 184 dev_err(dev, "Couldn't alloc long term buffer\n"); 185 return -ENOMEM; 186 } 187 ltb->map_id = adapter->map_id; 188 adapter->map_id++; 189 190 init_completion(&adapter->fw_done); 191 rc = send_request_map(adapter, ltb->addr, 192 ltb->size, ltb->map_id); 193 if (rc) { 194 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 195 return rc; 196 } 197 wait_for_completion(&adapter->fw_done); 198 199 if (adapter->fw_done_rc) { 200 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 201 adapter->fw_done_rc); 202 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 203 return -1; 204 } 205 return 0; 206 } 207 208 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 209 struct ibmvnic_long_term_buff *ltb) 210 { 211 struct device *dev = &adapter->vdev->dev; 212 213 if (!ltb->buff) 214 return; 215 216 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 217 adapter->reset_reason != VNIC_RESET_MOBILITY) 218 send_request_unmap(adapter, ltb->map_id); 219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 220 } 221 222 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 223 struct ibmvnic_long_term_buff *ltb) 224 { 225 int rc; 226 227 memset(ltb->buff, 0, ltb->size); 228 229 init_completion(&adapter->fw_done); 230 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 231 if (rc) 232 return rc; 233 wait_for_completion(&adapter->fw_done); 234 235 if (adapter->fw_done_rc) { 236 dev_info(&adapter->vdev->dev, 237 "Reset failed, attempting to free and reallocate buffer\n"); 238 free_long_term_buff(adapter, ltb); 239 return alloc_long_term_buff(adapter, ltb, ltb->size); 240 } 241 return 0; 242 } 243 244 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 245 { 246 int i; 247 248 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 249 i++) 250 adapter->rx_pool[i].active = 0; 251 } 252 253 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 254 struct ibmvnic_rx_pool *pool) 255 { 256 int count = pool->size - atomic_read(&pool->available); 257 struct device *dev = &adapter->vdev->dev; 258 int buffers_added = 0; 259 unsigned long lpar_rc; 260 union sub_crq sub_crq; 261 struct sk_buff *skb; 262 unsigned int offset; 263 dma_addr_t dma_addr; 264 unsigned char *dst; 265 u64 *handle_array; 266 int shift = 0; 267 int index; 268 int i; 269 270 if (!pool->active) 271 return; 272 273 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 274 be32_to_cpu(adapter->login_rsp_buf-> 275 off_rxadd_subcrqs)); 276 277 for (i = 0; i < count; ++i) { 278 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 279 if (!skb) { 280 dev_err(dev, "Couldn't replenish rx buff\n"); 281 adapter->replenish_no_mem++; 282 break; 283 } 284 285 index = pool->free_map[pool->next_free]; 286 287 if (pool->rx_buff[index].skb) 288 dev_err(dev, "Inconsistent free_map!\n"); 289 290 /* Copy the skb to the long term mapped DMA buffer */ 291 offset = index * pool->buff_size; 292 dst = pool->long_term_buff.buff + offset; 293 memset(dst, 0, pool->buff_size); 294 dma_addr = pool->long_term_buff.addr + offset; 295 pool->rx_buff[index].data = dst; 296 297 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 298 pool->rx_buff[index].dma = dma_addr; 299 pool->rx_buff[index].skb = skb; 300 pool->rx_buff[index].pool_index = pool->index; 301 pool->rx_buff[index].size = pool->buff_size; 302 303 memset(&sub_crq, 0, sizeof(sub_crq)); 304 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 305 sub_crq.rx_add.correlator = 306 cpu_to_be64((u64)&pool->rx_buff[index]); 307 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 308 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 309 310 /* The length field of the sCRQ is defined to be 24 bits so the 311 * buffer size needs to be left shifted by a byte before it is 312 * converted to big endian to prevent the last byte from being 313 * truncated. 314 */ 315 #ifdef __LITTLE_ENDIAN__ 316 shift = 8; 317 #endif 318 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 319 320 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 321 &sub_crq); 322 if (lpar_rc != H_SUCCESS) 323 goto failure; 324 325 buffers_added++; 326 adapter->replenish_add_buff_success++; 327 pool->next_free = (pool->next_free + 1) % pool->size; 328 } 329 atomic_add(buffers_added, &pool->available); 330 return; 331 332 failure: 333 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 334 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 335 pool->free_map[pool->next_free] = index; 336 pool->rx_buff[index].skb = NULL; 337 338 dev_kfree_skb_any(skb); 339 adapter->replenish_add_buff_failure++; 340 atomic_add(buffers_added, &pool->available); 341 342 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 343 /* Disable buffer pool replenishment and report carrier off if 344 * queue is closed or pending failover. 345 * Firmware guarantees that a signal will be sent to the 346 * driver, triggering a reset. 347 */ 348 deactivate_rx_pools(adapter); 349 netif_carrier_off(adapter->netdev); 350 } 351 } 352 353 static void replenish_pools(struct ibmvnic_adapter *adapter) 354 { 355 int i; 356 357 adapter->replenish_task_cycles++; 358 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 359 i++) { 360 if (adapter->rx_pool[i].active) 361 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 362 } 363 } 364 365 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 366 { 367 kfree(adapter->tx_stats_buffers); 368 kfree(adapter->rx_stats_buffers); 369 adapter->tx_stats_buffers = NULL; 370 adapter->rx_stats_buffers = NULL; 371 } 372 373 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 374 { 375 adapter->tx_stats_buffers = 376 kcalloc(IBMVNIC_MAX_QUEUES, 377 sizeof(struct ibmvnic_tx_queue_stats), 378 GFP_KERNEL); 379 if (!adapter->tx_stats_buffers) 380 return -ENOMEM; 381 382 adapter->rx_stats_buffers = 383 kcalloc(IBMVNIC_MAX_QUEUES, 384 sizeof(struct ibmvnic_rx_queue_stats), 385 GFP_KERNEL); 386 if (!adapter->rx_stats_buffers) 387 return -ENOMEM; 388 389 return 0; 390 } 391 392 static void release_stats_token(struct ibmvnic_adapter *adapter) 393 { 394 struct device *dev = &adapter->vdev->dev; 395 396 if (!adapter->stats_token) 397 return; 398 399 dma_unmap_single(dev, adapter->stats_token, 400 sizeof(struct ibmvnic_statistics), 401 DMA_FROM_DEVICE); 402 adapter->stats_token = 0; 403 } 404 405 static int init_stats_token(struct ibmvnic_adapter *adapter) 406 { 407 struct device *dev = &adapter->vdev->dev; 408 dma_addr_t stok; 409 410 stok = dma_map_single(dev, &adapter->stats, 411 sizeof(struct ibmvnic_statistics), 412 DMA_FROM_DEVICE); 413 if (dma_mapping_error(dev, stok)) { 414 dev_err(dev, "Couldn't map stats buffer\n"); 415 return -1; 416 } 417 418 adapter->stats_token = stok; 419 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 420 return 0; 421 } 422 423 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 424 { 425 struct ibmvnic_rx_pool *rx_pool; 426 int rx_scrqs; 427 int i, j, rc; 428 u64 *size_array; 429 430 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 431 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 432 433 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 434 for (i = 0; i < rx_scrqs; i++) { 435 rx_pool = &adapter->rx_pool[i]; 436 437 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 438 439 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 440 free_long_term_buff(adapter, &rx_pool->long_term_buff); 441 rx_pool->buff_size = be64_to_cpu(size_array[i]); 442 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 443 rx_pool->size * 444 rx_pool->buff_size); 445 } else { 446 rc = reset_long_term_buff(adapter, 447 &rx_pool->long_term_buff); 448 } 449 450 if (rc) 451 return rc; 452 453 for (j = 0; j < rx_pool->size; j++) 454 rx_pool->free_map[j] = j; 455 456 memset(rx_pool->rx_buff, 0, 457 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 458 459 atomic_set(&rx_pool->available, 0); 460 rx_pool->next_alloc = 0; 461 rx_pool->next_free = 0; 462 rx_pool->active = 1; 463 } 464 465 return 0; 466 } 467 468 static void release_rx_pools(struct ibmvnic_adapter *adapter) 469 { 470 struct ibmvnic_rx_pool *rx_pool; 471 int i, j; 472 473 if (!adapter->rx_pool) 474 return; 475 476 for (i = 0; i < adapter->num_active_rx_pools; i++) { 477 rx_pool = &adapter->rx_pool[i]; 478 479 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 480 481 kfree(rx_pool->free_map); 482 free_long_term_buff(adapter, &rx_pool->long_term_buff); 483 484 if (!rx_pool->rx_buff) 485 continue; 486 487 for (j = 0; j < rx_pool->size; j++) { 488 if (rx_pool->rx_buff[j].skb) { 489 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 490 rx_pool->rx_buff[j].skb = NULL; 491 } 492 } 493 494 kfree(rx_pool->rx_buff); 495 } 496 497 kfree(adapter->rx_pool); 498 adapter->rx_pool = NULL; 499 adapter->num_active_rx_pools = 0; 500 } 501 502 static int init_rx_pools(struct net_device *netdev) 503 { 504 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 505 struct device *dev = &adapter->vdev->dev; 506 struct ibmvnic_rx_pool *rx_pool; 507 int rxadd_subcrqs; 508 u64 *size_array; 509 int i, j; 510 511 rxadd_subcrqs = 512 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 513 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 514 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 515 516 adapter->rx_pool = kcalloc(rxadd_subcrqs, 517 sizeof(struct ibmvnic_rx_pool), 518 GFP_KERNEL); 519 if (!adapter->rx_pool) { 520 dev_err(dev, "Failed to allocate rx pools\n"); 521 return -1; 522 } 523 524 adapter->num_active_rx_pools = rxadd_subcrqs; 525 526 for (i = 0; i < rxadd_subcrqs; i++) { 527 rx_pool = &adapter->rx_pool[i]; 528 529 netdev_dbg(adapter->netdev, 530 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 531 i, adapter->req_rx_add_entries_per_subcrq, 532 be64_to_cpu(size_array[i])); 533 534 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 535 rx_pool->index = i; 536 rx_pool->buff_size = be64_to_cpu(size_array[i]); 537 rx_pool->active = 1; 538 539 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 540 GFP_KERNEL); 541 if (!rx_pool->free_map) { 542 release_rx_pools(adapter); 543 return -1; 544 } 545 546 rx_pool->rx_buff = kcalloc(rx_pool->size, 547 sizeof(struct ibmvnic_rx_buff), 548 GFP_KERNEL); 549 if (!rx_pool->rx_buff) { 550 dev_err(dev, "Couldn't alloc rx buffers\n"); 551 release_rx_pools(adapter); 552 return -1; 553 } 554 555 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 556 rx_pool->size * rx_pool->buff_size)) { 557 release_rx_pools(adapter); 558 return -1; 559 } 560 561 for (j = 0; j < rx_pool->size; ++j) 562 rx_pool->free_map[j] = j; 563 564 atomic_set(&rx_pool->available, 0); 565 rx_pool->next_alloc = 0; 566 rx_pool->next_free = 0; 567 } 568 569 return 0; 570 } 571 572 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 573 struct ibmvnic_tx_pool *tx_pool) 574 { 575 int rc, i; 576 577 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 578 if (rc) 579 return rc; 580 581 memset(tx_pool->tx_buff, 0, 582 tx_pool->num_buffers * 583 sizeof(struct ibmvnic_tx_buff)); 584 585 for (i = 0; i < tx_pool->num_buffers; i++) 586 tx_pool->free_map[i] = i; 587 588 tx_pool->consumer_index = 0; 589 tx_pool->producer_index = 0; 590 591 return 0; 592 } 593 594 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 595 { 596 int tx_scrqs; 597 int i, rc; 598 599 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 600 for (i = 0; i < tx_scrqs; i++) { 601 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 602 if (rc) 603 return rc; 604 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 605 if (rc) 606 return rc; 607 } 608 609 return 0; 610 } 611 612 static void release_vpd_data(struct ibmvnic_adapter *adapter) 613 { 614 if (!adapter->vpd) 615 return; 616 617 kfree(adapter->vpd->buff); 618 kfree(adapter->vpd); 619 620 adapter->vpd = NULL; 621 } 622 623 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 624 struct ibmvnic_tx_pool *tx_pool) 625 { 626 kfree(tx_pool->tx_buff); 627 kfree(tx_pool->free_map); 628 free_long_term_buff(adapter, &tx_pool->long_term_buff); 629 } 630 631 static void release_tx_pools(struct ibmvnic_adapter *adapter) 632 { 633 int i; 634 635 if (!adapter->tx_pool) 636 return; 637 638 for (i = 0; i < adapter->num_active_tx_pools; i++) { 639 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 640 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 641 } 642 643 kfree(adapter->tx_pool); 644 adapter->tx_pool = NULL; 645 kfree(adapter->tso_pool); 646 adapter->tso_pool = NULL; 647 adapter->num_active_tx_pools = 0; 648 } 649 650 static int init_one_tx_pool(struct net_device *netdev, 651 struct ibmvnic_tx_pool *tx_pool, 652 int num_entries, int buf_size) 653 { 654 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 655 int i; 656 657 tx_pool->tx_buff = kcalloc(num_entries, 658 sizeof(struct ibmvnic_tx_buff), 659 GFP_KERNEL); 660 if (!tx_pool->tx_buff) 661 return -1; 662 663 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 664 num_entries * buf_size)) 665 return -1; 666 667 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 668 if (!tx_pool->free_map) 669 return -1; 670 671 for (i = 0; i < num_entries; i++) 672 tx_pool->free_map[i] = i; 673 674 tx_pool->consumer_index = 0; 675 tx_pool->producer_index = 0; 676 tx_pool->num_buffers = num_entries; 677 tx_pool->buf_size = buf_size; 678 679 return 0; 680 } 681 682 static int init_tx_pools(struct net_device *netdev) 683 { 684 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 685 int tx_subcrqs; 686 int i, rc; 687 688 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 689 adapter->tx_pool = kcalloc(tx_subcrqs, 690 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 691 if (!adapter->tx_pool) 692 return -1; 693 694 adapter->tso_pool = kcalloc(tx_subcrqs, 695 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 696 if (!adapter->tso_pool) 697 return -1; 698 699 adapter->num_active_tx_pools = tx_subcrqs; 700 701 for (i = 0; i < tx_subcrqs; i++) { 702 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 703 adapter->req_tx_entries_per_subcrq, 704 adapter->req_mtu + VLAN_HLEN); 705 if (rc) { 706 release_tx_pools(adapter); 707 return rc; 708 } 709 710 init_one_tx_pool(netdev, &adapter->tso_pool[i], 711 IBMVNIC_TSO_BUFS, 712 IBMVNIC_TSO_BUF_SZ); 713 if (rc) { 714 release_tx_pools(adapter); 715 return rc; 716 } 717 } 718 719 return 0; 720 } 721 722 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 723 { 724 int i; 725 726 if (adapter->napi_enabled) 727 return; 728 729 for (i = 0; i < adapter->req_rx_queues; i++) 730 napi_enable(&adapter->napi[i]); 731 732 adapter->napi_enabled = true; 733 } 734 735 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 736 { 737 int i; 738 739 if (!adapter->napi_enabled) 740 return; 741 742 for (i = 0; i < adapter->req_rx_queues; i++) { 743 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 744 napi_disable(&adapter->napi[i]); 745 } 746 747 adapter->napi_enabled = false; 748 } 749 750 static int init_napi(struct ibmvnic_adapter *adapter) 751 { 752 int i; 753 754 adapter->napi = kcalloc(adapter->req_rx_queues, 755 sizeof(struct napi_struct), GFP_KERNEL); 756 if (!adapter->napi) 757 return -ENOMEM; 758 759 for (i = 0; i < adapter->req_rx_queues; i++) { 760 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 761 netif_napi_add(adapter->netdev, &adapter->napi[i], 762 ibmvnic_poll, NAPI_POLL_WEIGHT); 763 } 764 765 adapter->num_active_rx_napi = adapter->req_rx_queues; 766 return 0; 767 } 768 769 static void release_napi(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (!adapter->napi) 774 return; 775 776 for (i = 0; i < adapter->num_active_rx_napi; i++) { 777 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 778 netif_napi_del(&adapter->napi[i]); 779 } 780 781 kfree(adapter->napi); 782 adapter->napi = NULL; 783 adapter->num_active_rx_napi = 0; 784 adapter->napi_enabled = false; 785 } 786 787 static int ibmvnic_login(struct net_device *netdev) 788 { 789 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 790 unsigned long timeout = msecs_to_jiffies(30000); 791 int retry_count = 0; 792 bool retry; 793 int rc; 794 795 do { 796 retry = false; 797 if (retry_count > IBMVNIC_MAX_QUEUES) { 798 netdev_warn(netdev, "Login attempts exceeded\n"); 799 return -1; 800 } 801 802 adapter->init_done_rc = 0; 803 reinit_completion(&adapter->init_done); 804 rc = send_login(adapter); 805 if (rc) { 806 netdev_warn(netdev, "Unable to login\n"); 807 return rc; 808 } 809 810 if (!wait_for_completion_timeout(&adapter->init_done, 811 timeout)) { 812 netdev_warn(netdev, "Login timed out\n"); 813 return -1; 814 } 815 816 if (adapter->init_done_rc == PARTIALSUCCESS) { 817 retry_count++; 818 release_sub_crqs(adapter, 1); 819 820 retry = true; 821 netdev_dbg(netdev, 822 "Received partial success, retrying...\n"); 823 adapter->init_done_rc = 0; 824 reinit_completion(&adapter->init_done); 825 send_cap_queries(adapter); 826 if (!wait_for_completion_timeout(&adapter->init_done, 827 timeout)) { 828 netdev_warn(netdev, 829 "Capabilities query timed out\n"); 830 return -1; 831 } 832 833 rc = init_sub_crqs(adapter); 834 if (rc) { 835 netdev_warn(netdev, 836 "SCRQ initialization failed\n"); 837 return -1; 838 } 839 840 rc = init_sub_crq_irqs(adapter); 841 if (rc) { 842 netdev_warn(netdev, 843 "SCRQ irq initialization failed\n"); 844 return -1; 845 } 846 } else if (adapter->init_done_rc) { 847 netdev_warn(netdev, "Adapter login failed\n"); 848 return -1; 849 } 850 } while (retry); 851 852 /* handle pending MAC address changes after successful login */ 853 if (adapter->mac_change_pending) { 854 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 855 adapter->mac_change_pending = false; 856 } 857 858 return 0; 859 } 860 861 static void release_login_buffer(struct ibmvnic_adapter *adapter) 862 { 863 kfree(adapter->login_buf); 864 adapter->login_buf = NULL; 865 } 866 867 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 868 { 869 kfree(adapter->login_rsp_buf); 870 adapter->login_rsp_buf = NULL; 871 } 872 873 static void release_resources(struct ibmvnic_adapter *adapter) 874 { 875 release_vpd_data(adapter); 876 877 release_tx_pools(adapter); 878 release_rx_pools(adapter); 879 880 release_napi(adapter); 881 release_login_rsp_buffer(adapter); 882 } 883 884 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 885 { 886 struct net_device *netdev = adapter->netdev; 887 unsigned long timeout = msecs_to_jiffies(30000); 888 union ibmvnic_crq crq; 889 bool resend; 890 int rc; 891 892 netdev_dbg(netdev, "setting link state %d\n", link_state); 893 894 memset(&crq, 0, sizeof(crq)); 895 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 896 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 897 crq.logical_link_state.link_state = link_state; 898 899 do { 900 resend = false; 901 902 reinit_completion(&adapter->init_done); 903 rc = ibmvnic_send_crq(adapter, &crq); 904 if (rc) { 905 netdev_err(netdev, "Failed to set link state\n"); 906 return rc; 907 } 908 909 if (!wait_for_completion_timeout(&adapter->init_done, 910 timeout)) { 911 netdev_err(netdev, "timeout setting link state\n"); 912 return -1; 913 } 914 915 if (adapter->init_done_rc == 1) { 916 /* Partuial success, delay and re-send */ 917 mdelay(1000); 918 resend = true; 919 } else if (adapter->init_done_rc) { 920 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 921 adapter->init_done_rc); 922 return adapter->init_done_rc; 923 } 924 } while (resend); 925 926 return 0; 927 } 928 929 static int set_real_num_queues(struct net_device *netdev) 930 { 931 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 932 int rc; 933 934 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 935 adapter->req_tx_queues, adapter->req_rx_queues); 936 937 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 938 if (rc) { 939 netdev_err(netdev, "failed to set the number of tx queues\n"); 940 return rc; 941 } 942 943 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 944 if (rc) 945 netdev_err(netdev, "failed to set the number of rx queues\n"); 946 947 return rc; 948 } 949 950 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 951 { 952 struct device *dev = &adapter->vdev->dev; 953 union ibmvnic_crq crq; 954 int len = 0; 955 int rc; 956 957 if (adapter->vpd->buff) 958 len = adapter->vpd->len; 959 960 init_completion(&adapter->fw_done); 961 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 962 crq.get_vpd_size.cmd = GET_VPD_SIZE; 963 rc = ibmvnic_send_crq(adapter, &crq); 964 if (rc) 965 return rc; 966 wait_for_completion(&adapter->fw_done); 967 968 if (!adapter->vpd->len) 969 return -ENODATA; 970 971 if (!adapter->vpd->buff) 972 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 973 else if (adapter->vpd->len != len) 974 adapter->vpd->buff = 975 krealloc(adapter->vpd->buff, 976 adapter->vpd->len, GFP_KERNEL); 977 978 if (!adapter->vpd->buff) { 979 dev_err(dev, "Could allocate VPD buffer\n"); 980 return -ENOMEM; 981 } 982 983 adapter->vpd->dma_addr = 984 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 985 DMA_FROM_DEVICE); 986 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 987 dev_err(dev, "Could not map VPD buffer\n"); 988 kfree(adapter->vpd->buff); 989 adapter->vpd->buff = NULL; 990 return -ENOMEM; 991 } 992 993 reinit_completion(&adapter->fw_done); 994 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 995 crq.get_vpd.cmd = GET_VPD; 996 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 997 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 998 rc = ibmvnic_send_crq(adapter, &crq); 999 if (rc) { 1000 kfree(adapter->vpd->buff); 1001 adapter->vpd->buff = NULL; 1002 return rc; 1003 } 1004 wait_for_completion(&adapter->fw_done); 1005 1006 return 0; 1007 } 1008 1009 static int init_resources(struct ibmvnic_adapter *adapter) 1010 { 1011 struct net_device *netdev = adapter->netdev; 1012 int rc; 1013 1014 rc = set_real_num_queues(netdev); 1015 if (rc) 1016 return rc; 1017 1018 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1019 if (!adapter->vpd) 1020 return -ENOMEM; 1021 1022 /* Vital Product Data (VPD) */ 1023 rc = ibmvnic_get_vpd(adapter); 1024 if (rc) { 1025 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1026 return rc; 1027 } 1028 1029 adapter->map_id = 1; 1030 1031 rc = init_napi(adapter); 1032 if (rc) 1033 return rc; 1034 1035 send_map_query(adapter); 1036 1037 rc = init_rx_pools(netdev); 1038 if (rc) 1039 return rc; 1040 1041 rc = init_tx_pools(netdev); 1042 return rc; 1043 } 1044 1045 static int __ibmvnic_open(struct net_device *netdev) 1046 { 1047 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1048 enum vnic_state prev_state = adapter->state; 1049 int i, rc; 1050 1051 adapter->state = VNIC_OPENING; 1052 replenish_pools(adapter); 1053 ibmvnic_napi_enable(adapter); 1054 1055 /* We're ready to receive frames, enable the sub-crq interrupts and 1056 * set the logical link state to up 1057 */ 1058 for (i = 0; i < adapter->req_rx_queues; i++) { 1059 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1060 if (prev_state == VNIC_CLOSED) 1061 enable_irq(adapter->rx_scrq[i]->irq); 1062 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1063 } 1064 1065 for (i = 0; i < adapter->req_tx_queues; i++) { 1066 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1067 if (prev_state == VNIC_CLOSED) 1068 enable_irq(adapter->tx_scrq[i]->irq); 1069 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1070 } 1071 1072 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1073 if (rc) { 1074 for (i = 0; i < adapter->req_rx_queues; i++) 1075 napi_disable(&adapter->napi[i]); 1076 release_resources(adapter); 1077 return rc; 1078 } 1079 1080 netif_tx_start_all_queues(netdev); 1081 1082 if (prev_state == VNIC_CLOSED) { 1083 for (i = 0; i < adapter->req_rx_queues; i++) 1084 napi_schedule(&adapter->napi[i]); 1085 } 1086 1087 adapter->state = VNIC_OPEN; 1088 return rc; 1089 } 1090 1091 static int ibmvnic_open(struct net_device *netdev) 1092 { 1093 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1094 int rc; 1095 1096 /* If device failover is pending, just set device state and return. 1097 * Device operation will be handled by reset routine. 1098 */ 1099 if (adapter->failover_pending) { 1100 adapter->state = VNIC_OPEN; 1101 return 0; 1102 } 1103 1104 if (adapter->state != VNIC_CLOSED) { 1105 rc = ibmvnic_login(netdev); 1106 if (rc) 1107 return rc; 1108 1109 rc = init_resources(adapter); 1110 if (rc) { 1111 netdev_err(netdev, "failed to initialize resources\n"); 1112 release_resources(adapter); 1113 return rc; 1114 } 1115 } 1116 1117 rc = __ibmvnic_open(netdev); 1118 netif_carrier_on(netdev); 1119 1120 return rc; 1121 } 1122 1123 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1124 { 1125 struct ibmvnic_rx_pool *rx_pool; 1126 struct ibmvnic_rx_buff *rx_buff; 1127 u64 rx_entries; 1128 int rx_scrqs; 1129 int i, j; 1130 1131 if (!adapter->rx_pool) 1132 return; 1133 1134 rx_scrqs = adapter->num_active_rx_pools; 1135 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1136 1137 /* Free any remaining skbs in the rx buffer pools */ 1138 for (i = 0; i < rx_scrqs; i++) { 1139 rx_pool = &adapter->rx_pool[i]; 1140 if (!rx_pool || !rx_pool->rx_buff) 1141 continue; 1142 1143 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1144 for (j = 0; j < rx_entries; j++) { 1145 rx_buff = &rx_pool->rx_buff[j]; 1146 if (rx_buff && rx_buff->skb) { 1147 dev_kfree_skb_any(rx_buff->skb); 1148 rx_buff->skb = NULL; 1149 } 1150 } 1151 } 1152 } 1153 1154 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1155 struct ibmvnic_tx_pool *tx_pool) 1156 { 1157 struct ibmvnic_tx_buff *tx_buff; 1158 u64 tx_entries; 1159 int i; 1160 1161 if (!tx_pool || !tx_pool->tx_buff) 1162 return; 1163 1164 tx_entries = tx_pool->num_buffers; 1165 1166 for (i = 0; i < tx_entries; i++) { 1167 tx_buff = &tx_pool->tx_buff[i]; 1168 if (tx_buff && tx_buff->skb) { 1169 dev_kfree_skb_any(tx_buff->skb); 1170 tx_buff->skb = NULL; 1171 } 1172 } 1173 } 1174 1175 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1176 { 1177 int tx_scrqs; 1178 int i; 1179 1180 if (!adapter->tx_pool || !adapter->tso_pool) 1181 return; 1182 1183 tx_scrqs = adapter->num_active_tx_pools; 1184 1185 /* Free any remaining skbs in the tx buffer pools */ 1186 for (i = 0; i < tx_scrqs; i++) { 1187 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1188 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1189 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1190 } 1191 } 1192 1193 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1194 { 1195 struct net_device *netdev = adapter->netdev; 1196 int i; 1197 1198 if (adapter->tx_scrq) { 1199 for (i = 0; i < adapter->req_tx_queues; i++) 1200 if (adapter->tx_scrq[i]->irq) { 1201 netdev_dbg(netdev, 1202 "Disabling tx_scrq[%d] irq\n", i); 1203 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1204 disable_irq(adapter->tx_scrq[i]->irq); 1205 } 1206 } 1207 1208 if (adapter->rx_scrq) { 1209 for (i = 0; i < adapter->req_rx_queues; i++) { 1210 if (adapter->rx_scrq[i]->irq) { 1211 netdev_dbg(netdev, 1212 "Disabling rx_scrq[%d] irq\n", i); 1213 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1214 disable_irq(adapter->rx_scrq[i]->irq); 1215 } 1216 } 1217 } 1218 } 1219 1220 static void ibmvnic_cleanup(struct net_device *netdev) 1221 { 1222 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1223 1224 /* ensure that transmissions are stopped if called by do_reset */ 1225 if (adapter->resetting) 1226 netif_tx_disable(netdev); 1227 else 1228 netif_tx_stop_all_queues(netdev); 1229 1230 ibmvnic_napi_disable(adapter); 1231 ibmvnic_disable_irqs(adapter); 1232 1233 clean_rx_pools(adapter); 1234 clean_tx_pools(adapter); 1235 } 1236 1237 static int __ibmvnic_close(struct net_device *netdev) 1238 { 1239 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1240 int rc = 0; 1241 1242 adapter->state = VNIC_CLOSING; 1243 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1244 if (rc) 1245 return rc; 1246 adapter->state = VNIC_CLOSED; 1247 return 0; 1248 } 1249 1250 static int ibmvnic_close(struct net_device *netdev) 1251 { 1252 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1253 int rc; 1254 1255 /* If device failover is pending, just set device state and return. 1256 * Device operation will be handled by reset routine. 1257 */ 1258 if (adapter->failover_pending) { 1259 adapter->state = VNIC_CLOSED; 1260 return 0; 1261 } 1262 1263 rc = __ibmvnic_close(netdev); 1264 ibmvnic_cleanup(netdev); 1265 1266 return rc; 1267 } 1268 1269 /** 1270 * build_hdr_data - creates L2/L3/L4 header data buffer 1271 * @hdr_field - bitfield determining needed headers 1272 * @skb - socket buffer 1273 * @hdr_len - array of header lengths 1274 * @tot_len - total length of data 1275 * 1276 * Reads hdr_field to determine which headers are needed by firmware. 1277 * Builds a buffer containing these headers. Saves individual header 1278 * lengths and total buffer length to be used to build descriptors. 1279 */ 1280 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1281 int *hdr_len, u8 *hdr_data) 1282 { 1283 int len = 0; 1284 u8 *hdr; 1285 1286 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1287 hdr_len[0] = sizeof(struct vlan_ethhdr); 1288 else 1289 hdr_len[0] = sizeof(struct ethhdr); 1290 1291 if (skb->protocol == htons(ETH_P_IP)) { 1292 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1293 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1294 hdr_len[2] = tcp_hdrlen(skb); 1295 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1296 hdr_len[2] = sizeof(struct udphdr); 1297 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1298 hdr_len[1] = sizeof(struct ipv6hdr); 1299 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1300 hdr_len[2] = tcp_hdrlen(skb); 1301 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1302 hdr_len[2] = sizeof(struct udphdr); 1303 } else if (skb->protocol == htons(ETH_P_ARP)) { 1304 hdr_len[1] = arp_hdr_len(skb->dev); 1305 hdr_len[2] = 0; 1306 } 1307 1308 memset(hdr_data, 0, 120); 1309 if ((hdr_field >> 6) & 1) { 1310 hdr = skb_mac_header(skb); 1311 memcpy(hdr_data, hdr, hdr_len[0]); 1312 len += hdr_len[0]; 1313 } 1314 1315 if ((hdr_field >> 5) & 1) { 1316 hdr = skb_network_header(skb); 1317 memcpy(hdr_data + len, hdr, hdr_len[1]); 1318 len += hdr_len[1]; 1319 } 1320 1321 if ((hdr_field >> 4) & 1) { 1322 hdr = skb_transport_header(skb); 1323 memcpy(hdr_data + len, hdr, hdr_len[2]); 1324 len += hdr_len[2]; 1325 } 1326 return len; 1327 } 1328 1329 /** 1330 * create_hdr_descs - create header and header extension descriptors 1331 * @hdr_field - bitfield determining needed headers 1332 * @data - buffer containing header data 1333 * @len - length of data buffer 1334 * @hdr_len - array of individual header lengths 1335 * @scrq_arr - descriptor array 1336 * 1337 * Creates header and, if needed, header extension descriptors and 1338 * places them in a descriptor array, scrq_arr 1339 */ 1340 1341 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1342 union sub_crq *scrq_arr) 1343 { 1344 union sub_crq hdr_desc; 1345 int tmp_len = len; 1346 int num_descs = 0; 1347 u8 *data, *cur; 1348 int tmp; 1349 1350 while (tmp_len > 0) { 1351 cur = hdr_data + len - tmp_len; 1352 1353 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1354 if (cur != hdr_data) { 1355 data = hdr_desc.hdr_ext.data; 1356 tmp = tmp_len > 29 ? 29 : tmp_len; 1357 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1358 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1359 hdr_desc.hdr_ext.len = tmp; 1360 } else { 1361 data = hdr_desc.hdr.data; 1362 tmp = tmp_len > 24 ? 24 : tmp_len; 1363 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1364 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1365 hdr_desc.hdr.len = tmp; 1366 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1367 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1368 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1369 hdr_desc.hdr.flag = hdr_field << 1; 1370 } 1371 memcpy(data, cur, tmp); 1372 tmp_len -= tmp; 1373 *scrq_arr = hdr_desc; 1374 scrq_arr++; 1375 num_descs++; 1376 } 1377 1378 return num_descs; 1379 } 1380 1381 /** 1382 * build_hdr_descs_arr - build a header descriptor array 1383 * @skb - socket buffer 1384 * @num_entries - number of descriptors to be sent 1385 * @subcrq - first TX descriptor 1386 * @hdr_field - bit field determining which headers will be sent 1387 * 1388 * This function will build a TX descriptor array with applicable 1389 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1390 */ 1391 1392 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1393 int *num_entries, u8 hdr_field) 1394 { 1395 int hdr_len[3] = {0, 0, 0}; 1396 int tot_len; 1397 u8 *hdr_data = txbuff->hdr_data; 1398 1399 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1400 txbuff->hdr_data); 1401 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1402 txbuff->indir_arr + 1); 1403 } 1404 1405 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1406 struct net_device *netdev) 1407 { 1408 /* For some backing devices, mishandling of small packets 1409 * can result in a loss of connection or TX stall. Device 1410 * architects recommend that no packet should be smaller 1411 * than the minimum MTU value provided to the driver, so 1412 * pad any packets to that length 1413 */ 1414 if (skb->len < netdev->min_mtu) 1415 return skb_put_padto(skb, netdev->min_mtu); 1416 1417 return 0; 1418 } 1419 1420 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1421 { 1422 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1423 int queue_num = skb_get_queue_mapping(skb); 1424 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1425 struct device *dev = &adapter->vdev->dev; 1426 struct ibmvnic_tx_buff *tx_buff = NULL; 1427 struct ibmvnic_sub_crq_queue *tx_scrq; 1428 struct ibmvnic_tx_pool *tx_pool; 1429 unsigned int tx_send_failed = 0; 1430 unsigned int tx_map_failed = 0; 1431 unsigned int tx_dropped = 0; 1432 unsigned int tx_packets = 0; 1433 unsigned int tx_bytes = 0; 1434 dma_addr_t data_dma_addr; 1435 struct netdev_queue *txq; 1436 unsigned long lpar_rc; 1437 union sub_crq tx_crq; 1438 unsigned int offset; 1439 int num_entries = 1; 1440 unsigned char *dst; 1441 u64 *handle_array; 1442 int index = 0; 1443 u8 proto = 0; 1444 netdev_tx_t ret = NETDEV_TX_OK; 1445 1446 if (adapter->resetting) { 1447 if (!netif_subqueue_stopped(netdev, skb)) 1448 netif_stop_subqueue(netdev, queue_num); 1449 dev_kfree_skb_any(skb); 1450 1451 tx_send_failed++; 1452 tx_dropped++; 1453 ret = NETDEV_TX_OK; 1454 goto out; 1455 } 1456 1457 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1458 tx_dropped++; 1459 tx_send_failed++; 1460 ret = NETDEV_TX_OK; 1461 goto out; 1462 } 1463 if (skb_is_gso(skb)) 1464 tx_pool = &adapter->tso_pool[queue_num]; 1465 else 1466 tx_pool = &adapter->tx_pool[queue_num]; 1467 1468 tx_scrq = adapter->tx_scrq[queue_num]; 1469 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1470 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1471 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1472 1473 index = tx_pool->free_map[tx_pool->consumer_index]; 1474 1475 if (index == IBMVNIC_INVALID_MAP) { 1476 dev_kfree_skb_any(skb); 1477 tx_send_failed++; 1478 tx_dropped++; 1479 ret = NETDEV_TX_OK; 1480 goto out; 1481 } 1482 1483 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1484 1485 offset = index * tx_pool->buf_size; 1486 dst = tx_pool->long_term_buff.buff + offset; 1487 memset(dst, 0, tx_pool->buf_size); 1488 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1489 1490 if (skb_shinfo(skb)->nr_frags) { 1491 int cur, i; 1492 1493 /* Copy the head */ 1494 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1495 cur = skb_headlen(skb); 1496 1497 /* Copy the frags */ 1498 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1499 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1500 1501 memcpy(dst + cur, 1502 page_address(skb_frag_page(frag)) + 1503 frag->page_offset, skb_frag_size(frag)); 1504 cur += skb_frag_size(frag); 1505 } 1506 } else { 1507 skb_copy_from_linear_data(skb, dst, skb->len); 1508 } 1509 1510 tx_pool->consumer_index = 1511 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1512 1513 tx_buff = &tx_pool->tx_buff[index]; 1514 tx_buff->skb = skb; 1515 tx_buff->data_dma[0] = data_dma_addr; 1516 tx_buff->data_len[0] = skb->len; 1517 tx_buff->index = index; 1518 tx_buff->pool_index = queue_num; 1519 tx_buff->last_frag = true; 1520 1521 memset(&tx_crq, 0, sizeof(tx_crq)); 1522 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1523 tx_crq.v1.type = IBMVNIC_TX_DESC; 1524 tx_crq.v1.n_crq_elem = 1; 1525 tx_crq.v1.n_sge = 1; 1526 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1527 1528 if (skb_is_gso(skb)) 1529 tx_crq.v1.correlator = 1530 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1531 else 1532 tx_crq.v1.correlator = cpu_to_be32(index); 1533 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1534 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1535 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1536 1537 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1538 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1539 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1540 } 1541 1542 if (skb->protocol == htons(ETH_P_IP)) { 1543 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1544 proto = ip_hdr(skb)->protocol; 1545 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1546 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1547 proto = ipv6_hdr(skb)->nexthdr; 1548 } 1549 1550 if (proto == IPPROTO_TCP) 1551 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1552 else if (proto == IPPROTO_UDP) 1553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1554 1555 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1556 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1557 hdrs += 2; 1558 } 1559 if (skb_is_gso(skb)) { 1560 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1561 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1562 hdrs += 2; 1563 } 1564 /* determine if l2/3/4 headers are sent to firmware */ 1565 if ((*hdrs >> 7) & 1) { 1566 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1567 tx_crq.v1.n_crq_elem = num_entries; 1568 tx_buff->num_entries = num_entries; 1569 tx_buff->indir_arr[0] = tx_crq; 1570 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1571 sizeof(tx_buff->indir_arr), 1572 DMA_TO_DEVICE); 1573 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1574 dev_kfree_skb_any(skb); 1575 tx_buff->skb = NULL; 1576 if (!firmware_has_feature(FW_FEATURE_CMO)) 1577 dev_err(dev, "tx: unable to map descriptor array\n"); 1578 tx_map_failed++; 1579 tx_dropped++; 1580 ret = NETDEV_TX_OK; 1581 goto tx_err_out; 1582 } 1583 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1584 (u64)tx_buff->indir_dma, 1585 (u64)num_entries); 1586 } else { 1587 tx_buff->num_entries = num_entries; 1588 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1589 &tx_crq); 1590 } 1591 if (lpar_rc != H_SUCCESS) { 1592 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1593 dev_err_ratelimited(dev, "tx: send failed\n"); 1594 dev_kfree_skb_any(skb); 1595 tx_buff->skb = NULL; 1596 1597 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1598 /* Disable TX and report carrier off if queue is closed 1599 * or pending failover. 1600 * Firmware guarantees that a signal will be sent to the 1601 * driver, triggering a reset or some other action. 1602 */ 1603 netif_tx_stop_all_queues(netdev); 1604 netif_carrier_off(netdev); 1605 } 1606 1607 tx_send_failed++; 1608 tx_dropped++; 1609 ret = NETDEV_TX_OK; 1610 goto tx_err_out; 1611 } 1612 1613 if (atomic_add_return(num_entries, &tx_scrq->used) 1614 >= adapter->req_tx_entries_per_subcrq) { 1615 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1616 netif_stop_subqueue(netdev, queue_num); 1617 } 1618 1619 tx_packets++; 1620 tx_bytes += skb->len; 1621 txq->trans_start = jiffies; 1622 ret = NETDEV_TX_OK; 1623 goto out; 1624 1625 tx_err_out: 1626 /* roll back consumer index and map array*/ 1627 if (tx_pool->consumer_index == 0) 1628 tx_pool->consumer_index = 1629 tx_pool->num_buffers - 1; 1630 else 1631 tx_pool->consumer_index--; 1632 tx_pool->free_map[tx_pool->consumer_index] = index; 1633 out: 1634 netdev->stats.tx_dropped += tx_dropped; 1635 netdev->stats.tx_bytes += tx_bytes; 1636 netdev->stats.tx_packets += tx_packets; 1637 adapter->tx_send_failed += tx_send_failed; 1638 adapter->tx_map_failed += tx_map_failed; 1639 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1640 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1641 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1642 1643 return ret; 1644 } 1645 1646 static void ibmvnic_set_multi(struct net_device *netdev) 1647 { 1648 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1649 struct netdev_hw_addr *ha; 1650 union ibmvnic_crq crq; 1651 1652 memset(&crq, 0, sizeof(crq)); 1653 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1654 crq.request_capability.cmd = REQUEST_CAPABILITY; 1655 1656 if (netdev->flags & IFF_PROMISC) { 1657 if (!adapter->promisc_supported) 1658 return; 1659 } else { 1660 if (netdev->flags & IFF_ALLMULTI) { 1661 /* Accept all multicast */ 1662 memset(&crq, 0, sizeof(crq)); 1663 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1664 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1665 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1666 ibmvnic_send_crq(adapter, &crq); 1667 } else if (netdev_mc_empty(netdev)) { 1668 /* Reject all multicast */ 1669 memset(&crq, 0, sizeof(crq)); 1670 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1671 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1672 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1673 ibmvnic_send_crq(adapter, &crq); 1674 } else { 1675 /* Accept one or more multicast(s) */ 1676 netdev_for_each_mc_addr(ha, netdev) { 1677 memset(&crq, 0, sizeof(crq)); 1678 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1679 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1680 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1681 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1682 ha->addr); 1683 ibmvnic_send_crq(adapter, &crq); 1684 } 1685 } 1686 } 1687 } 1688 1689 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1690 { 1691 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1692 struct sockaddr *addr = p; 1693 union ibmvnic_crq crq; 1694 int rc; 1695 1696 if (!is_valid_ether_addr(addr->sa_data)) 1697 return -EADDRNOTAVAIL; 1698 1699 memset(&crq, 0, sizeof(crq)); 1700 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1701 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1702 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1703 1704 init_completion(&adapter->fw_done); 1705 rc = ibmvnic_send_crq(adapter, &crq); 1706 if (rc) 1707 return rc; 1708 wait_for_completion(&adapter->fw_done); 1709 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1710 return adapter->fw_done_rc ? -EIO : 0; 1711 } 1712 1713 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1714 { 1715 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1716 struct sockaddr *addr = p; 1717 int rc; 1718 1719 if (adapter->state == VNIC_PROBED) { 1720 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1721 adapter->mac_change_pending = true; 1722 return 0; 1723 } 1724 1725 rc = __ibmvnic_set_mac(netdev, addr); 1726 1727 return rc; 1728 } 1729 1730 /** 1731 * do_reset returns zero if we are able to keep processing reset events, or 1732 * non-zero if we hit a fatal error and must halt. 1733 */ 1734 static int do_reset(struct ibmvnic_adapter *adapter, 1735 struct ibmvnic_rwi *rwi, u32 reset_state) 1736 { 1737 u64 old_num_rx_queues, old_num_tx_queues; 1738 u64 old_num_rx_slots, old_num_tx_slots; 1739 struct net_device *netdev = adapter->netdev; 1740 int i, rc; 1741 1742 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1743 rwi->reset_reason); 1744 1745 netif_carrier_off(netdev); 1746 adapter->reset_reason = rwi->reset_reason; 1747 1748 old_num_rx_queues = adapter->req_rx_queues; 1749 old_num_tx_queues = adapter->req_tx_queues; 1750 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1751 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1752 1753 ibmvnic_cleanup(netdev); 1754 1755 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1756 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1757 rc = __ibmvnic_close(netdev); 1758 if (rc) 1759 return rc; 1760 } 1761 1762 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1763 adapter->wait_for_reset) { 1764 release_resources(adapter); 1765 release_sub_crqs(adapter, 1); 1766 release_crq_queue(adapter); 1767 } 1768 1769 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1770 /* remove the closed state so when we call open it appears 1771 * we are coming from the probed state. 1772 */ 1773 adapter->state = VNIC_PROBED; 1774 1775 if (adapter->wait_for_reset) { 1776 rc = init_crq_queue(adapter); 1777 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1778 rc = ibmvnic_reenable_crq_queue(adapter); 1779 release_sub_crqs(adapter, 1); 1780 } else { 1781 rc = ibmvnic_reset_crq(adapter); 1782 if (!rc) 1783 rc = vio_enable_interrupts(adapter->vdev); 1784 } 1785 1786 if (rc) { 1787 netdev_err(adapter->netdev, 1788 "Couldn't initialize crq. rc=%d\n", rc); 1789 return rc; 1790 } 1791 1792 rc = ibmvnic_reset_init(adapter); 1793 if (rc) 1794 return IBMVNIC_INIT_FAILED; 1795 1796 /* If the adapter was in PROBE state prior to the reset, 1797 * exit here. 1798 */ 1799 if (reset_state == VNIC_PROBED) 1800 return 0; 1801 1802 rc = ibmvnic_login(netdev); 1803 if (rc) { 1804 adapter->state = reset_state; 1805 return rc; 1806 } 1807 1808 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1809 adapter->wait_for_reset) { 1810 rc = init_resources(adapter); 1811 if (rc) 1812 return rc; 1813 } else if (adapter->req_rx_queues != old_num_rx_queues || 1814 adapter->req_tx_queues != old_num_tx_queues || 1815 adapter->req_rx_add_entries_per_subcrq != 1816 old_num_rx_slots || 1817 adapter->req_tx_entries_per_subcrq != 1818 old_num_tx_slots) { 1819 release_rx_pools(adapter); 1820 release_tx_pools(adapter); 1821 release_napi(adapter); 1822 release_vpd_data(adapter); 1823 1824 rc = init_resources(adapter); 1825 if (rc) 1826 return rc; 1827 1828 } else { 1829 rc = reset_tx_pools(adapter); 1830 if (rc) 1831 return rc; 1832 1833 rc = reset_rx_pools(adapter); 1834 if (rc) 1835 return rc; 1836 } 1837 ibmvnic_disable_irqs(adapter); 1838 } 1839 adapter->state = VNIC_CLOSED; 1840 1841 if (reset_state == VNIC_CLOSED) 1842 return 0; 1843 1844 rc = __ibmvnic_open(netdev); 1845 if (rc) { 1846 if (list_empty(&adapter->rwi_list)) 1847 adapter->state = VNIC_CLOSED; 1848 else 1849 adapter->state = reset_state; 1850 1851 return 0; 1852 } 1853 1854 /* kick napi */ 1855 for (i = 0; i < adapter->req_rx_queues; i++) 1856 napi_schedule(&adapter->napi[i]); 1857 1858 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1859 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1860 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1861 1862 netif_carrier_on(netdev); 1863 1864 return 0; 1865 } 1866 1867 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1868 struct ibmvnic_rwi *rwi, u32 reset_state) 1869 { 1870 struct net_device *netdev = adapter->netdev; 1871 int rc; 1872 1873 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1874 rwi->reset_reason); 1875 1876 netif_carrier_off(netdev); 1877 adapter->reset_reason = rwi->reset_reason; 1878 1879 ibmvnic_cleanup(netdev); 1880 release_resources(adapter); 1881 release_sub_crqs(adapter, 0); 1882 release_crq_queue(adapter); 1883 1884 /* remove the closed state so when we call open it appears 1885 * we are coming from the probed state. 1886 */ 1887 adapter->state = VNIC_PROBED; 1888 1889 reinit_completion(&adapter->init_done); 1890 rc = init_crq_queue(adapter); 1891 if (rc) { 1892 netdev_err(adapter->netdev, 1893 "Couldn't initialize crq. rc=%d\n", rc); 1894 return rc; 1895 } 1896 1897 rc = ibmvnic_init(adapter); 1898 if (rc) 1899 return rc; 1900 1901 /* If the adapter was in PROBE state prior to the reset, 1902 * exit here. 1903 */ 1904 if (reset_state == VNIC_PROBED) 1905 return 0; 1906 1907 rc = ibmvnic_login(netdev); 1908 if (rc) { 1909 adapter->state = VNIC_PROBED; 1910 return 0; 1911 } 1912 1913 rc = init_resources(adapter); 1914 if (rc) 1915 return rc; 1916 1917 ibmvnic_disable_irqs(adapter); 1918 adapter->state = VNIC_CLOSED; 1919 1920 if (reset_state == VNIC_CLOSED) 1921 return 0; 1922 1923 rc = __ibmvnic_open(netdev); 1924 if (rc) { 1925 if (list_empty(&adapter->rwi_list)) 1926 adapter->state = VNIC_CLOSED; 1927 else 1928 adapter->state = reset_state; 1929 1930 return 0; 1931 } 1932 1933 netif_carrier_on(netdev); 1934 1935 return 0; 1936 } 1937 1938 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1939 { 1940 struct ibmvnic_rwi *rwi; 1941 unsigned long flags; 1942 1943 spin_lock_irqsave(&adapter->rwi_lock, flags); 1944 1945 if (!list_empty(&adapter->rwi_list)) { 1946 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1947 list); 1948 list_del(&rwi->list); 1949 } else { 1950 rwi = NULL; 1951 } 1952 1953 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 1954 return rwi; 1955 } 1956 1957 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1958 { 1959 struct ibmvnic_rwi *rwi; 1960 1961 rwi = get_next_rwi(adapter); 1962 while (rwi) { 1963 kfree(rwi); 1964 rwi = get_next_rwi(adapter); 1965 } 1966 } 1967 1968 static void __ibmvnic_reset(struct work_struct *work) 1969 { 1970 struct ibmvnic_rwi *rwi; 1971 struct ibmvnic_adapter *adapter; 1972 bool we_lock_rtnl = false; 1973 u32 reset_state; 1974 int rc = 0; 1975 1976 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1977 1978 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1979 * unless wait_for_reset is set, in which case the rtnl lock 1980 * has already been taken before initializing the reset 1981 */ 1982 if (!adapter->wait_for_reset) { 1983 rtnl_lock(); 1984 we_lock_rtnl = true; 1985 } 1986 reset_state = adapter->state; 1987 1988 rwi = get_next_rwi(adapter); 1989 while (rwi) { 1990 if (adapter->force_reset_recovery) { 1991 adapter->force_reset_recovery = false; 1992 rc = do_hard_reset(adapter, rwi, reset_state); 1993 } else { 1994 rc = do_reset(adapter, rwi, reset_state); 1995 } 1996 kfree(rwi); 1997 if (rc && rc != IBMVNIC_INIT_FAILED && 1998 !adapter->force_reset_recovery) 1999 break; 2000 2001 rwi = get_next_rwi(adapter); 2002 } 2003 2004 if (adapter->wait_for_reset) { 2005 adapter->wait_for_reset = false; 2006 adapter->reset_done_rc = rc; 2007 complete(&adapter->reset_done); 2008 } 2009 2010 if (rc) { 2011 netdev_dbg(adapter->netdev, "Reset failed\n"); 2012 free_all_rwi(adapter); 2013 } 2014 2015 adapter->resetting = false; 2016 if (we_lock_rtnl) 2017 rtnl_unlock(); 2018 } 2019 2020 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2021 enum ibmvnic_reset_reason reason) 2022 { 2023 struct list_head *entry, *tmp_entry; 2024 struct ibmvnic_rwi *rwi, *tmp; 2025 struct net_device *netdev = adapter->netdev; 2026 unsigned long flags; 2027 int ret; 2028 2029 if (adapter->state == VNIC_REMOVING || 2030 adapter->state == VNIC_REMOVED || 2031 adapter->failover_pending) { 2032 ret = EBUSY; 2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2034 goto err; 2035 } 2036 2037 if (adapter->state == VNIC_PROBING) { 2038 netdev_warn(netdev, "Adapter reset during probe\n"); 2039 ret = adapter->init_done_rc = EAGAIN; 2040 goto err; 2041 } 2042 2043 spin_lock_irqsave(&adapter->rwi_lock, flags); 2044 2045 list_for_each(entry, &adapter->rwi_list) { 2046 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2047 if (tmp->reset_reason == reason) { 2048 netdev_dbg(netdev, "Skipping matching reset\n"); 2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2050 ret = EBUSY; 2051 goto err; 2052 } 2053 } 2054 2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2056 if (!rwi) { 2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2058 ibmvnic_close(netdev); 2059 ret = ENOMEM; 2060 goto err; 2061 } 2062 /* if we just received a transport event, 2063 * flush reset queue and process this reset 2064 */ 2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2067 list_del(entry); 2068 } 2069 rwi->reset_reason = reason; 2070 list_add_tail(&rwi->list, &adapter->rwi_list); 2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2072 adapter->resetting = true; 2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2074 schedule_work(&adapter->ibmvnic_reset); 2075 2076 return 0; 2077 err: 2078 if (adapter->wait_for_reset) 2079 adapter->wait_for_reset = false; 2080 return -ret; 2081 } 2082 2083 static void ibmvnic_tx_timeout(struct net_device *dev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2086 2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2088 } 2089 2090 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2091 struct ibmvnic_rx_buff *rx_buff) 2092 { 2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2094 2095 rx_buff->skb = NULL; 2096 2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2099 2100 atomic_dec(&pool->available); 2101 } 2102 2103 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2104 { 2105 struct net_device *netdev = napi->dev; 2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2107 int scrq_num = (int)(napi - adapter->napi); 2108 int frames_processed = 0; 2109 2110 restart_poll: 2111 while (frames_processed < budget) { 2112 struct sk_buff *skb; 2113 struct ibmvnic_rx_buff *rx_buff; 2114 union sub_crq *next; 2115 u32 length; 2116 u16 offset; 2117 u8 flags = 0; 2118 2119 if (unlikely(adapter->resetting && 2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2122 napi_complete_done(napi, frames_processed); 2123 return frames_processed; 2124 } 2125 2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2127 break; 2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2129 rx_buff = 2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2131 rx_comp.correlator); 2132 /* do error checking */ 2133 if (next->rx_comp.rc) { 2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2135 be16_to_cpu(next->rx_comp.rc)); 2136 /* free the entry */ 2137 next->rx_comp.first = 0; 2138 dev_kfree_skb_any(rx_buff->skb); 2139 remove_buff_from_pool(adapter, rx_buff); 2140 continue; 2141 } else if (!rx_buff->skb) { 2142 /* free the entry */ 2143 next->rx_comp.first = 0; 2144 remove_buff_from_pool(adapter, rx_buff); 2145 continue; 2146 } 2147 2148 length = be32_to_cpu(next->rx_comp.len); 2149 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2150 flags = next->rx_comp.flags; 2151 skb = rx_buff->skb; 2152 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2153 length); 2154 2155 /* VLAN Header has been stripped by the system firmware and 2156 * needs to be inserted by the driver 2157 */ 2158 if (adapter->rx_vlan_header_insertion && 2159 (flags & IBMVNIC_VLAN_STRIPPED)) 2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2161 ntohs(next->rx_comp.vlan_tci)); 2162 2163 /* free the entry */ 2164 next->rx_comp.first = 0; 2165 remove_buff_from_pool(adapter, rx_buff); 2166 2167 skb_put(skb, length); 2168 skb->protocol = eth_type_trans(skb, netdev); 2169 skb_record_rx_queue(skb, scrq_num); 2170 2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2173 skb->ip_summed = CHECKSUM_UNNECESSARY; 2174 } 2175 2176 length = skb->len; 2177 napi_gro_receive(napi, skb); /* send it up */ 2178 netdev->stats.rx_packets++; 2179 netdev->stats.rx_bytes += length; 2180 adapter->rx_stats_buffers[scrq_num].packets++; 2181 adapter->rx_stats_buffers[scrq_num].bytes += length; 2182 frames_processed++; 2183 } 2184 2185 if (adapter->state != VNIC_CLOSING) 2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2187 2188 if (frames_processed < budget) { 2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2190 napi_complete_done(napi, frames_processed); 2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2192 napi_reschedule(napi)) { 2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2194 goto restart_poll; 2195 } 2196 } 2197 return frames_processed; 2198 } 2199 2200 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2201 { 2202 int rc, ret; 2203 2204 adapter->fallback.mtu = adapter->req_mtu; 2205 adapter->fallback.rx_queues = adapter->req_rx_queues; 2206 adapter->fallback.tx_queues = adapter->req_tx_queues; 2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2209 2210 init_completion(&adapter->reset_done); 2211 adapter->wait_for_reset = true; 2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2213 if (rc) 2214 return rc; 2215 wait_for_completion(&adapter->reset_done); 2216 2217 ret = 0; 2218 if (adapter->reset_done_rc) { 2219 ret = -EIO; 2220 adapter->desired.mtu = adapter->fallback.mtu; 2221 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2222 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2223 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2224 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2225 2226 init_completion(&adapter->reset_done); 2227 adapter->wait_for_reset = true; 2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2229 if (rc) 2230 return ret; 2231 wait_for_completion(&adapter->reset_done); 2232 } 2233 adapter->wait_for_reset = false; 2234 2235 return ret; 2236 } 2237 2238 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2239 { 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2241 2242 adapter->desired.mtu = new_mtu + ETH_HLEN; 2243 2244 return wait_for_reset(adapter); 2245 } 2246 2247 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2248 struct net_device *dev, 2249 netdev_features_t features) 2250 { 2251 /* Some backing hardware adapters can not 2252 * handle packets with a MSS less than 224 2253 * or with only one segment. 2254 */ 2255 if (skb_is_gso(skb)) { 2256 if (skb_shinfo(skb)->gso_size < 224 || 2257 skb_shinfo(skb)->gso_segs == 1) 2258 features &= ~NETIF_F_GSO_MASK; 2259 } 2260 2261 return features; 2262 } 2263 2264 static const struct net_device_ops ibmvnic_netdev_ops = { 2265 .ndo_open = ibmvnic_open, 2266 .ndo_stop = ibmvnic_close, 2267 .ndo_start_xmit = ibmvnic_xmit, 2268 .ndo_set_rx_mode = ibmvnic_set_multi, 2269 .ndo_set_mac_address = ibmvnic_set_mac, 2270 .ndo_validate_addr = eth_validate_addr, 2271 .ndo_tx_timeout = ibmvnic_tx_timeout, 2272 .ndo_change_mtu = ibmvnic_change_mtu, 2273 .ndo_features_check = ibmvnic_features_check, 2274 }; 2275 2276 /* ethtool functions */ 2277 2278 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2279 struct ethtool_link_ksettings *cmd) 2280 { 2281 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2282 int rc; 2283 2284 rc = send_query_phys_parms(adapter); 2285 if (rc) { 2286 adapter->speed = SPEED_UNKNOWN; 2287 adapter->duplex = DUPLEX_UNKNOWN; 2288 } 2289 cmd->base.speed = adapter->speed; 2290 cmd->base.duplex = adapter->duplex; 2291 cmd->base.port = PORT_FIBRE; 2292 cmd->base.phy_address = 0; 2293 cmd->base.autoneg = AUTONEG_ENABLE; 2294 2295 return 0; 2296 } 2297 2298 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2299 struct ethtool_drvinfo *info) 2300 { 2301 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2302 2303 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2304 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2305 strlcpy(info->fw_version, adapter->fw_version, 2306 sizeof(info->fw_version)); 2307 } 2308 2309 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2310 { 2311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2312 2313 return adapter->msg_enable; 2314 } 2315 2316 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2317 { 2318 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2319 2320 adapter->msg_enable = data; 2321 } 2322 2323 static u32 ibmvnic_get_link(struct net_device *netdev) 2324 { 2325 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2326 2327 /* Don't need to send a query because we request a logical link up at 2328 * init and then we wait for link state indications 2329 */ 2330 return adapter->logical_link_state; 2331 } 2332 2333 static void ibmvnic_get_ringparam(struct net_device *netdev, 2334 struct ethtool_ringparam *ring) 2335 { 2336 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2337 2338 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2339 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2340 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2341 } else { 2342 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2343 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2344 } 2345 ring->rx_mini_max_pending = 0; 2346 ring->rx_jumbo_max_pending = 0; 2347 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2348 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2349 ring->rx_mini_pending = 0; 2350 ring->rx_jumbo_pending = 0; 2351 } 2352 2353 static int ibmvnic_set_ringparam(struct net_device *netdev, 2354 struct ethtool_ringparam *ring) 2355 { 2356 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2357 int ret; 2358 2359 ret = 0; 2360 adapter->desired.rx_entries = ring->rx_pending; 2361 adapter->desired.tx_entries = ring->tx_pending; 2362 2363 ret = wait_for_reset(adapter); 2364 2365 if (!ret && 2366 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2367 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2368 netdev_info(netdev, 2369 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2370 ring->rx_pending, ring->tx_pending, 2371 adapter->req_rx_add_entries_per_subcrq, 2372 adapter->req_tx_entries_per_subcrq); 2373 return ret; 2374 } 2375 2376 static void ibmvnic_get_channels(struct net_device *netdev, 2377 struct ethtool_channels *channels) 2378 { 2379 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2380 2381 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2382 channels->max_rx = adapter->max_rx_queues; 2383 channels->max_tx = adapter->max_tx_queues; 2384 } else { 2385 channels->max_rx = IBMVNIC_MAX_QUEUES; 2386 channels->max_tx = IBMVNIC_MAX_QUEUES; 2387 } 2388 2389 channels->max_other = 0; 2390 channels->max_combined = 0; 2391 channels->rx_count = adapter->req_rx_queues; 2392 channels->tx_count = adapter->req_tx_queues; 2393 channels->other_count = 0; 2394 channels->combined_count = 0; 2395 } 2396 2397 static int ibmvnic_set_channels(struct net_device *netdev, 2398 struct ethtool_channels *channels) 2399 { 2400 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2401 int ret; 2402 2403 ret = 0; 2404 adapter->desired.rx_queues = channels->rx_count; 2405 adapter->desired.tx_queues = channels->tx_count; 2406 2407 ret = wait_for_reset(adapter); 2408 2409 if (!ret && 2410 (adapter->req_rx_queues != channels->rx_count || 2411 adapter->req_tx_queues != channels->tx_count)) 2412 netdev_info(netdev, 2413 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2414 channels->rx_count, channels->tx_count, 2415 adapter->req_rx_queues, adapter->req_tx_queues); 2416 return ret; 2417 2418 } 2419 2420 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2421 { 2422 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2423 int i; 2424 2425 switch (stringset) { 2426 case ETH_SS_STATS: 2427 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2428 i++, data += ETH_GSTRING_LEN) 2429 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2430 2431 for (i = 0; i < adapter->req_tx_queues; i++) { 2432 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2433 data += ETH_GSTRING_LEN; 2434 2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2436 data += ETH_GSTRING_LEN; 2437 2438 snprintf(data, ETH_GSTRING_LEN, 2439 "tx%d_dropped_packets", i); 2440 data += ETH_GSTRING_LEN; 2441 } 2442 2443 for (i = 0; i < adapter->req_rx_queues; i++) { 2444 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2445 data += ETH_GSTRING_LEN; 2446 2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2448 data += ETH_GSTRING_LEN; 2449 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2451 data += ETH_GSTRING_LEN; 2452 } 2453 break; 2454 2455 case ETH_SS_PRIV_FLAGS: 2456 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2457 strcpy(data + i * ETH_GSTRING_LEN, 2458 ibmvnic_priv_flags[i]); 2459 break; 2460 default: 2461 return; 2462 } 2463 } 2464 2465 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2466 { 2467 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2468 2469 switch (sset) { 2470 case ETH_SS_STATS: 2471 return ARRAY_SIZE(ibmvnic_stats) + 2472 adapter->req_tx_queues * NUM_TX_STATS + 2473 adapter->req_rx_queues * NUM_RX_STATS; 2474 case ETH_SS_PRIV_FLAGS: 2475 return ARRAY_SIZE(ibmvnic_priv_flags); 2476 default: 2477 return -EOPNOTSUPP; 2478 } 2479 } 2480 2481 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2482 struct ethtool_stats *stats, u64 *data) 2483 { 2484 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2485 union ibmvnic_crq crq; 2486 int i, j; 2487 int rc; 2488 2489 memset(&crq, 0, sizeof(crq)); 2490 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2491 crq.request_statistics.cmd = REQUEST_STATISTICS; 2492 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2493 crq.request_statistics.len = 2494 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2495 2496 /* Wait for data to be written */ 2497 init_completion(&adapter->stats_done); 2498 rc = ibmvnic_send_crq(adapter, &crq); 2499 if (rc) 2500 return; 2501 wait_for_completion(&adapter->stats_done); 2502 2503 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2504 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2505 ibmvnic_stats[i].offset)); 2506 2507 for (j = 0; j < adapter->req_tx_queues; j++) { 2508 data[i] = adapter->tx_stats_buffers[j].packets; 2509 i++; 2510 data[i] = adapter->tx_stats_buffers[j].bytes; 2511 i++; 2512 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2513 i++; 2514 } 2515 2516 for (j = 0; j < adapter->req_rx_queues; j++) { 2517 data[i] = adapter->rx_stats_buffers[j].packets; 2518 i++; 2519 data[i] = adapter->rx_stats_buffers[j].bytes; 2520 i++; 2521 data[i] = adapter->rx_stats_buffers[j].interrupts; 2522 i++; 2523 } 2524 } 2525 2526 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2527 { 2528 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2529 2530 return adapter->priv_flags; 2531 } 2532 2533 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2534 { 2535 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2536 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2537 2538 if (which_maxes) 2539 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2540 else 2541 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2542 2543 return 0; 2544 } 2545 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2546 .get_drvinfo = ibmvnic_get_drvinfo, 2547 .get_msglevel = ibmvnic_get_msglevel, 2548 .set_msglevel = ibmvnic_set_msglevel, 2549 .get_link = ibmvnic_get_link, 2550 .get_ringparam = ibmvnic_get_ringparam, 2551 .set_ringparam = ibmvnic_set_ringparam, 2552 .get_channels = ibmvnic_get_channels, 2553 .set_channels = ibmvnic_set_channels, 2554 .get_strings = ibmvnic_get_strings, 2555 .get_sset_count = ibmvnic_get_sset_count, 2556 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2557 .get_link_ksettings = ibmvnic_get_link_ksettings, 2558 .get_priv_flags = ibmvnic_get_priv_flags, 2559 .set_priv_flags = ibmvnic_set_priv_flags, 2560 }; 2561 2562 /* Routines for managing CRQs/sCRQs */ 2563 2564 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2565 struct ibmvnic_sub_crq_queue *scrq) 2566 { 2567 int rc; 2568 2569 if (scrq->irq) { 2570 free_irq(scrq->irq, scrq); 2571 irq_dispose_mapping(scrq->irq); 2572 scrq->irq = 0; 2573 } 2574 2575 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2576 atomic_set(&scrq->used, 0); 2577 scrq->cur = 0; 2578 2579 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2580 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2581 return rc; 2582 } 2583 2584 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2585 { 2586 int i, rc; 2587 2588 for (i = 0; i < adapter->req_tx_queues; i++) { 2589 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2590 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2591 if (rc) 2592 return rc; 2593 } 2594 2595 for (i = 0; i < adapter->req_rx_queues; i++) { 2596 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2597 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2598 if (rc) 2599 return rc; 2600 } 2601 2602 return rc; 2603 } 2604 2605 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2606 struct ibmvnic_sub_crq_queue *scrq, 2607 bool do_h_free) 2608 { 2609 struct device *dev = &adapter->vdev->dev; 2610 long rc; 2611 2612 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2613 2614 if (do_h_free) { 2615 /* Close the sub-crqs */ 2616 do { 2617 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2618 adapter->vdev->unit_address, 2619 scrq->crq_num); 2620 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2621 2622 if (rc) { 2623 netdev_err(adapter->netdev, 2624 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2625 scrq->crq_num, rc); 2626 } 2627 } 2628 2629 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2630 DMA_BIDIRECTIONAL); 2631 free_pages((unsigned long)scrq->msgs, 2); 2632 kfree(scrq); 2633 } 2634 2635 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2636 *adapter) 2637 { 2638 struct device *dev = &adapter->vdev->dev; 2639 struct ibmvnic_sub_crq_queue *scrq; 2640 int rc; 2641 2642 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2643 if (!scrq) 2644 return NULL; 2645 2646 scrq->msgs = 2647 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2648 if (!scrq->msgs) { 2649 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2650 goto zero_page_failed; 2651 } 2652 2653 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2654 DMA_BIDIRECTIONAL); 2655 if (dma_mapping_error(dev, scrq->msg_token)) { 2656 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2657 goto map_failed; 2658 } 2659 2660 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2661 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2662 2663 if (rc == H_RESOURCE) 2664 rc = ibmvnic_reset_crq(adapter); 2665 2666 if (rc == H_CLOSED) { 2667 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2668 } else if (rc) { 2669 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2670 goto reg_failed; 2671 } 2672 2673 scrq->adapter = adapter; 2674 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2675 spin_lock_init(&scrq->lock); 2676 2677 netdev_dbg(adapter->netdev, 2678 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2679 scrq->crq_num, scrq->hw_irq, scrq->irq); 2680 2681 return scrq; 2682 2683 reg_failed: 2684 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2685 DMA_BIDIRECTIONAL); 2686 map_failed: 2687 free_pages((unsigned long)scrq->msgs, 2); 2688 zero_page_failed: 2689 kfree(scrq); 2690 2691 return NULL; 2692 } 2693 2694 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2695 { 2696 int i; 2697 2698 if (adapter->tx_scrq) { 2699 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2700 if (!adapter->tx_scrq[i]) 2701 continue; 2702 2703 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2704 i); 2705 if (adapter->tx_scrq[i]->irq) { 2706 free_irq(adapter->tx_scrq[i]->irq, 2707 adapter->tx_scrq[i]); 2708 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2709 adapter->tx_scrq[i]->irq = 0; 2710 } 2711 2712 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2713 do_h_free); 2714 } 2715 2716 kfree(adapter->tx_scrq); 2717 adapter->tx_scrq = NULL; 2718 adapter->num_active_tx_scrqs = 0; 2719 } 2720 2721 if (adapter->rx_scrq) { 2722 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2723 if (!adapter->rx_scrq[i]) 2724 continue; 2725 2726 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2727 i); 2728 if (adapter->rx_scrq[i]->irq) { 2729 free_irq(adapter->rx_scrq[i]->irq, 2730 adapter->rx_scrq[i]); 2731 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2732 adapter->rx_scrq[i]->irq = 0; 2733 } 2734 2735 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2736 do_h_free); 2737 } 2738 2739 kfree(adapter->rx_scrq); 2740 adapter->rx_scrq = NULL; 2741 adapter->num_active_rx_scrqs = 0; 2742 } 2743 } 2744 2745 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2746 struct ibmvnic_sub_crq_queue *scrq) 2747 { 2748 struct device *dev = &adapter->vdev->dev; 2749 unsigned long rc; 2750 2751 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2752 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2753 if (rc) 2754 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2755 scrq->hw_irq, rc); 2756 return rc; 2757 } 2758 2759 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2760 struct ibmvnic_sub_crq_queue *scrq) 2761 { 2762 struct device *dev = &adapter->vdev->dev; 2763 unsigned long rc; 2764 2765 if (scrq->hw_irq > 0x100000000ULL) { 2766 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2767 return 1; 2768 } 2769 2770 if (adapter->resetting && 2771 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2772 u64 val = (0xff000000) | scrq->hw_irq; 2773 2774 rc = plpar_hcall_norets(H_EOI, val); 2775 if (rc) 2776 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2777 val, rc); 2778 } 2779 2780 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2781 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2782 if (rc) 2783 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2784 scrq->hw_irq, rc); 2785 return rc; 2786 } 2787 2788 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2789 struct ibmvnic_sub_crq_queue *scrq) 2790 { 2791 struct device *dev = &adapter->vdev->dev; 2792 struct ibmvnic_tx_pool *tx_pool; 2793 struct ibmvnic_tx_buff *txbuff; 2794 union sub_crq *next; 2795 int index; 2796 int i, j; 2797 u8 *first; 2798 2799 restart_loop: 2800 while (pending_scrq(adapter, scrq)) { 2801 unsigned int pool = scrq->pool_index; 2802 int num_entries = 0; 2803 2804 next = ibmvnic_next_scrq(adapter, scrq); 2805 for (i = 0; i < next->tx_comp.num_comps; i++) { 2806 if (next->tx_comp.rcs[i]) { 2807 dev_err(dev, "tx error %x\n", 2808 next->tx_comp.rcs[i]); 2809 continue; 2810 } 2811 index = be32_to_cpu(next->tx_comp.correlators[i]); 2812 if (index & IBMVNIC_TSO_POOL_MASK) { 2813 tx_pool = &adapter->tso_pool[pool]; 2814 index &= ~IBMVNIC_TSO_POOL_MASK; 2815 } else { 2816 tx_pool = &adapter->tx_pool[pool]; 2817 } 2818 2819 txbuff = &tx_pool->tx_buff[index]; 2820 2821 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2822 if (!txbuff->data_dma[j]) 2823 continue; 2824 2825 txbuff->data_dma[j] = 0; 2826 } 2827 /* if sub_crq was sent indirectly */ 2828 first = &txbuff->indir_arr[0].generic.first; 2829 if (*first == IBMVNIC_CRQ_CMD) { 2830 dma_unmap_single(dev, txbuff->indir_dma, 2831 sizeof(txbuff->indir_arr), 2832 DMA_TO_DEVICE); 2833 *first = 0; 2834 } 2835 2836 if (txbuff->last_frag) { 2837 dev_kfree_skb_any(txbuff->skb); 2838 txbuff->skb = NULL; 2839 } 2840 2841 num_entries += txbuff->num_entries; 2842 2843 tx_pool->free_map[tx_pool->producer_index] = index; 2844 tx_pool->producer_index = 2845 (tx_pool->producer_index + 1) % 2846 tx_pool->num_buffers; 2847 } 2848 /* remove tx_comp scrq*/ 2849 next->tx_comp.first = 0; 2850 2851 if (atomic_sub_return(num_entries, &scrq->used) <= 2852 (adapter->req_tx_entries_per_subcrq / 2) && 2853 __netif_subqueue_stopped(adapter->netdev, 2854 scrq->pool_index)) { 2855 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2856 netdev_dbg(adapter->netdev, "Started queue %d\n", 2857 scrq->pool_index); 2858 } 2859 } 2860 2861 enable_scrq_irq(adapter, scrq); 2862 2863 if (pending_scrq(adapter, scrq)) { 2864 disable_scrq_irq(adapter, scrq); 2865 goto restart_loop; 2866 } 2867 2868 return 0; 2869 } 2870 2871 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2872 { 2873 struct ibmvnic_sub_crq_queue *scrq = instance; 2874 struct ibmvnic_adapter *adapter = scrq->adapter; 2875 2876 disable_scrq_irq(adapter, scrq); 2877 ibmvnic_complete_tx(adapter, scrq); 2878 2879 return IRQ_HANDLED; 2880 } 2881 2882 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2883 { 2884 struct ibmvnic_sub_crq_queue *scrq = instance; 2885 struct ibmvnic_adapter *adapter = scrq->adapter; 2886 2887 /* When booting a kdump kernel we can hit pending interrupts 2888 * prior to completing driver initialization. 2889 */ 2890 if (unlikely(adapter->state != VNIC_OPEN)) 2891 return IRQ_NONE; 2892 2893 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2894 2895 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2896 disable_scrq_irq(adapter, scrq); 2897 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2898 } 2899 2900 return IRQ_HANDLED; 2901 } 2902 2903 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2904 { 2905 struct device *dev = &adapter->vdev->dev; 2906 struct ibmvnic_sub_crq_queue *scrq; 2907 int i = 0, j = 0; 2908 int rc = 0; 2909 2910 for (i = 0; i < adapter->req_tx_queues; i++) { 2911 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2912 i); 2913 scrq = adapter->tx_scrq[i]; 2914 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2915 2916 if (!scrq->irq) { 2917 rc = -EINVAL; 2918 dev_err(dev, "Error mapping irq\n"); 2919 goto req_tx_irq_failed; 2920 } 2921 2922 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2923 0, "ibmvnic_tx", scrq); 2924 2925 if (rc) { 2926 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2927 scrq->irq, rc); 2928 irq_dispose_mapping(scrq->irq); 2929 goto req_tx_irq_failed; 2930 } 2931 } 2932 2933 for (i = 0; i < adapter->req_rx_queues; i++) { 2934 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2935 i); 2936 scrq = adapter->rx_scrq[i]; 2937 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2938 if (!scrq->irq) { 2939 rc = -EINVAL; 2940 dev_err(dev, "Error mapping irq\n"); 2941 goto req_rx_irq_failed; 2942 } 2943 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2944 0, "ibmvnic_rx", scrq); 2945 if (rc) { 2946 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2947 scrq->irq, rc); 2948 irq_dispose_mapping(scrq->irq); 2949 goto req_rx_irq_failed; 2950 } 2951 } 2952 return rc; 2953 2954 req_rx_irq_failed: 2955 for (j = 0; j < i; j++) { 2956 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2957 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2958 } 2959 i = adapter->req_tx_queues; 2960 req_tx_irq_failed: 2961 for (j = 0; j < i; j++) { 2962 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2963 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2964 } 2965 release_sub_crqs(adapter, 1); 2966 return rc; 2967 } 2968 2969 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2970 { 2971 struct device *dev = &adapter->vdev->dev; 2972 struct ibmvnic_sub_crq_queue **allqueues; 2973 int registered_queues = 0; 2974 int total_queues; 2975 int more = 0; 2976 int i; 2977 2978 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2979 2980 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2981 if (!allqueues) 2982 return -1; 2983 2984 for (i = 0; i < total_queues; i++) { 2985 allqueues[i] = init_sub_crq_queue(adapter); 2986 if (!allqueues[i]) { 2987 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2988 break; 2989 } 2990 registered_queues++; 2991 } 2992 2993 /* Make sure we were able to register the minimum number of queues */ 2994 if (registered_queues < 2995 adapter->min_tx_queues + adapter->min_rx_queues) { 2996 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2997 goto tx_failed; 2998 } 2999 3000 /* Distribute the failed allocated queues*/ 3001 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3002 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3003 switch (i % 3) { 3004 case 0: 3005 if (adapter->req_rx_queues > adapter->min_rx_queues) 3006 adapter->req_rx_queues--; 3007 else 3008 more++; 3009 break; 3010 case 1: 3011 if (adapter->req_tx_queues > adapter->min_tx_queues) 3012 adapter->req_tx_queues--; 3013 else 3014 more++; 3015 break; 3016 } 3017 } 3018 3019 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3020 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3021 if (!adapter->tx_scrq) 3022 goto tx_failed; 3023 3024 for (i = 0; i < adapter->req_tx_queues; i++) { 3025 adapter->tx_scrq[i] = allqueues[i]; 3026 adapter->tx_scrq[i]->pool_index = i; 3027 adapter->num_active_tx_scrqs++; 3028 } 3029 3030 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3031 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3032 if (!adapter->rx_scrq) 3033 goto rx_failed; 3034 3035 for (i = 0; i < adapter->req_rx_queues; i++) { 3036 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3037 adapter->rx_scrq[i]->scrq_num = i; 3038 adapter->num_active_rx_scrqs++; 3039 } 3040 3041 kfree(allqueues); 3042 return 0; 3043 3044 rx_failed: 3045 kfree(adapter->tx_scrq); 3046 adapter->tx_scrq = NULL; 3047 tx_failed: 3048 for (i = 0; i < registered_queues; i++) 3049 release_sub_crq_queue(adapter, allqueues[i], 1); 3050 kfree(allqueues); 3051 return -1; 3052 } 3053 3054 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3055 { 3056 struct device *dev = &adapter->vdev->dev; 3057 union ibmvnic_crq crq; 3058 int max_entries; 3059 3060 if (!retry) { 3061 /* Sub-CRQ entries are 32 byte long */ 3062 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3063 3064 if (adapter->min_tx_entries_per_subcrq > entries_page || 3065 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3066 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3067 return; 3068 } 3069 3070 if (adapter->desired.mtu) 3071 adapter->req_mtu = adapter->desired.mtu; 3072 else 3073 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3074 3075 if (!adapter->desired.tx_entries) 3076 adapter->desired.tx_entries = 3077 adapter->max_tx_entries_per_subcrq; 3078 if (!adapter->desired.rx_entries) 3079 adapter->desired.rx_entries = 3080 adapter->max_rx_add_entries_per_subcrq; 3081 3082 max_entries = IBMVNIC_MAX_LTB_SIZE / 3083 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3084 3085 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3086 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3087 adapter->desired.tx_entries = max_entries; 3088 } 3089 3090 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3091 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3092 adapter->desired.rx_entries = max_entries; 3093 } 3094 3095 if (adapter->desired.tx_entries) 3096 adapter->req_tx_entries_per_subcrq = 3097 adapter->desired.tx_entries; 3098 else 3099 adapter->req_tx_entries_per_subcrq = 3100 adapter->max_tx_entries_per_subcrq; 3101 3102 if (adapter->desired.rx_entries) 3103 adapter->req_rx_add_entries_per_subcrq = 3104 adapter->desired.rx_entries; 3105 else 3106 adapter->req_rx_add_entries_per_subcrq = 3107 adapter->max_rx_add_entries_per_subcrq; 3108 3109 if (adapter->desired.tx_queues) 3110 adapter->req_tx_queues = 3111 adapter->desired.tx_queues; 3112 else 3113 adapter->req_tx_queues = 3114 adapter->opt_tx_comp_sub_queues; 3115 3116 if (adapter->desired.rx_queues) 3117 adapter->req_rx_queues = 3118 adapter->desired.rx_queues; 3119 else 3120 adapter->req_rx_queues = 3121 adapter->opt_rx_comp_queues; 3122 3123 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3124 } 3125 3126 memset(&crq, 0, sizeof(crq)); 3127 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3128 crq.request_capability.cmd = REQUEST_CAPABILITY; 3129 3130 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3131 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3132 atomic_inc(&adapter->running_cap_crqs); 3133 ibmvnic_send_crq(adapter, &crq); 3134 3135 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3136 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3137 atomic_inc(&adapter->running_cap_crqs); 3138 ibmvnic_send_crq(adapter, &crq); 3139 3140 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3141 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3142 atomic_inc(&adapter->running_cap_crqs); 3143 ibmvnic_send_crq(adapter, &crq); 3144 3145 crq.request_capability.capability = 3146 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3147 crq.request_capability.number = 3148 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3149 atomic_inc(&adapter->running_cap_crqs); 3150 ibmvnic_send_crq(adapter, &crq); 3151 3152 crq.request_capability.capability = 3153 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3154 crq.request_capability.number = 3155 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3156 atomic_inc(&adapter->running_cap_crqs); 3157 ibmvnic_send_crq(adapter, &crq); 3158 3159 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3160 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3161 atomic_inc(&adapter->running_cap_crqs); 3162 ibmvnic_send_crq(adapter, &crq); 3163 3164 if (adapter->netdev->flags & IFF_PROMISC) { 3165 if (adapter->promisc_supported) { 3166 crq.request_capability.capability = 3167 cpu_to_be16(PROMISC_REQUESTED); 3168 crq.request_capability.number = cpu_to_be64(1); 3169 atomic_inc(&adapter->running_cap_crqs); 3170 ibmvnic_send_crq(adapter, &crq); 3171 } 3172 } else { 3173 crq.request_capability.capability = 3174 cpu_to_be16(PROMISC_REQUESTED); 3175 crq.request_capability.number = cpu_to_be64(0); 3176 atomic_inc(&adapter->running_cap_crqs); 3177 ibmvnic_send_crq(adapter, &crq); 3178 } 3179 } 3180 3181 static int pending_scrq(struct ibmvnic_adapter *adapter, 3182 struct ibmvnic_sub_crq_queue *scrq) 3183 { 3184 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3185 3186 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3187 return 1; 3188 else 3189 return 0; 3190 } 3191 3192 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3193 struct ibmvnic_sub_crq_queue *scrq) 3194 { 3195 union sub_crq *entry; 3196 unsigned long flags; 3197 3198 spin_lock_irqsave(&scrq->lock, flags); 3199 entry = &scrq->msgs[scrq->cur]; 3200 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3201 if (++scrq->cur == scrq->size) 3202 scrq->cur = 0; 3203 } else { 3204 entry = NULL; 3205 } 3206 spin_unlock_irqrestore(&scrq->lock, flags); 3207 3208 return entry; 3209 } 3210 3211 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3212 { 3213 struct ibmvnic_crq_queue *queue = &adapter->crq; 3214 union ibmvnic_crq *crq; 3215 3216 crq = &queue->msgs[queue->cur]; 3217 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3218 if (++queue->cur == queue->size) 3219 queue->cur = 0; 3220 } else { 3221 crq = NULL; 3222 } 3223 3224 return crq; 3225 } 3226 3227 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3228 { 3229 switch (rc) { 3230 case H_PARAMETER: 3231 dev_warn_ratelimited(dev, 3232 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3233 func, rc); 3234 break; 3235 case H_CLOSED: 3236 dev_warn_ratelimited(dev, 3237 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3238 func, rc); 3239 break; 3240 default: 3241 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3242 break; 3243 } 3244 } 3245 3246 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3247 union sub_crq *sub_crq) 3248 { 3249 unsigned int ua = adapter->vdev->unit_address; 3250 struct device *dev = &adapter->vdev->dev; 3251 u64 *u64_crq = (u64 *)sub_crq; 3252 int rc; 3253 3254 netdev_dbg(adapter->netdev, 3255 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3256 (unsigned long int)cpu_to_be64(remote_handle), 3257 (unsigned long int)cpu_to_be64(u64_crq[0]), 3258 (unsigned long int)cpu_to_be64(u64_crq[1]), 3259 (unsigned long int)cpu_to_be64(u64_crq[2]), 3260 (unsigned long int)cpu_to_be64(u64_crq[3])); 3261 3262 /* Make sure the hypervisor sees the complete request */ 3263 mb(); 3264 3265 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3266 cpu_to_be64(remote_handle), 3267 cpu_to_be64(u64_crq[0]), 3268 cpu_to_be64(u64_crq[1]), 3269 cpu_to_be64(u64_crq[2]), 3270 cpu_to_be64(u64_crq[3])); 3271 3272 if (rc) 3273 print_subcrq_error(dev, rc, __func__); 3274 3275 return rc; 3276 } 3277 3278 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3279 u64 remote_handle, u64 ioba, u64 num_entries) 3280 { 3281 unsigned int ua = adapter->vdev->unit_address; 3282 struct device *dev = &adapter->vdev->dev; 3283 int rc; 3284 3285 /* Make sure the hypervisor sees the complete request */ 3286 mb(); 3287 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3288 cpu_to_be64(remote_handle), 3289 ioba, num_entries); 3290 3291 if (rc) 3292 print_subcrq_error(dev, rc, __func__); 3293 3294 return rc; 3295 } 3296 3297 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3298 union ibmvnic_crq *crq) 3299 { 3300 unsigned int ua = adapter->vdev->unit_address; 3301 struct device *dev = &adapter->vdev->dev; 3302 u64 *u64_crq = (u64 *)crq; 3303 int rc; 3304 3305 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3306 (unsigned long int)cpu_to_be64(u64_crq[0]), 3307 (unsigned long int)cpu_to_be64(u64_crq[1])); 3308 3309 if (!adapter->crq.active && 3310 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3311 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3312 return -EINVAL; 3313 } 3314 3315 /* Make sure the hypervisor sees the complete request */ 3316 mb(); 3317 3318 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3319 cpu_to_be64(u64_crq[0]), 3320 cpu_to_be64(u64_crq[1])); 3321 3322 if (rc) { 3323 if (rc == H_CLOSED) { 3324 dev_warn(dev, "CRQ Queue closed\n"); 3325 if (adapter->resetting) 3326 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3327 } 3328 3329 dev_warn(dev, "Send error (rc=%d)\n", rc); 3330 } 3331 3332 return rc; 3333 } 3334 3335 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3336 { 3337 union ibmvnic_crq crq; 3338 3339 memset(&crq, 0, sizeof(crq)); 3340 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3341 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3342 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3343 3344 return ibmvnic_send_crq(adapter, &crq); 3345 } 3346 3347 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3348 { 3349 union ibmvnic_crq crq; 3350 3351 memset(&crq, 0, sizeof(crq)); 3352 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3353 crq.version_exchange.cmd = VERSION_EXCHANGE; 3354 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3355 3356 return ibmvnic_send_crq(adapter, &crq); 3357 } 3358 3359 struct vnic_login_client_data { 3360 u8 type; 3361 __be16 len; 3362 char name[]; 3363 } __packed; 3364 3365 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3366 { 3367 int len; 3368 3369 /* Calculate the amount of buffer space needed for the 3370 * vnic client data in the login buffer. There are four entries, 3371 * OS name, LPAR name, device name, and a null last entry. 3372 */ 3373 len = 4 * sizeof(struct vnic_login_client_data); 3374 len += 6; /* "Linux" plus NULL */ 3375 len += strlen(utsname()->nodename) + 1; 3376 len += strlen(adapter->netdev->name) + 1; 3377 3378 return len; 3379 } 3380 3381 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3382 struct vnic_login_client_data *vlcd) 3383 { 3384 const char *os_name = "Linux"; 3385 int len; 3386 3387 /* Type 1 - LPAR OS */ 3388 vlcd->type = 1; 3389 len = strlen(os_name) + 1; 3390 vlcd->len = cpu_to_be16(len); 3391 strncpy(vlcd->name, os_name, len); 3392 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3393 3394 /* Type 2 - LPAR name */ 3395 vlcd->type = 2; 3396 len = strlen(utsname()->nodename) + 1; 3397 vlcd->len = cpu_to_be16(len); 3398 strncpy(vlcd->name, utsname()->nodename, len); 3399 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3400 3401 /* Type 3 - device name */ 3402 vlcd->type = 3; 3403 len = strlen(adapter->netdev->name) + 1; 3404 vlcd->len = cpu_to_be16(len); 3405 strncpy(vlcd->name, adapter->netdev->name, len); 3406 } 3407 3408 static int send_login(struct ibmvnic_adapter *adapter) 3409 { 3410 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3411 struct ibmvnic_login_buffer *login_buffer; 3412 struct device *dev = &adapter->vdev->dev; 3413 dma_addr_t rsp_buffer_token; 3414 dma_addr_t buffer_token; 3415 size_t rsp_buffer_size; 3416 union ibmvnic_crq crq; 3417 size_t buffer_size; 3418 __be64 *tx_list_p; 3419 __be64 *rx_list_p; 3420 int client_data_len; 3421 struct vnic_login_client_data *vlcd; 3422 int i; 3423 3424 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3425 netdev_err(adapter->netdev, 3426 "RX or TX queues are not allocated, device login failed\n"); 3427 return -1; 3428 } 3429 3430 release_login_rsp_buffer(adapter); 3431 client_data_len = vnic_client_data_len(adapter); 3432 3433 buffer_size = 3434 sizeof(struct ibmvnic_login_buffer) + 3435 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3436 client_data_len; 3437 3438 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3439 if (!login_buffer) 3440 goto buf_alloc_failed; 3441 3442 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3443 DMA_TO_DEVICE); 3444 if (dma_mapping_error(dev, buffer_token)) { 3445 dev_err(dev, "Couldn't map login buffer\n"); 3446 goto buf_map_failed; 3447 } 3448 3449 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3450 sizeof(u64) * adapter->req_tx_queues + 3451 sizeof(u64) * adapter->req_rx_queues + 3452 sizeof(u64) * adapter->req_rx_queues + 3453 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3454 3455 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3456 if (!login_rsp_buffer) 3457 goto buf_rsp_alloc_failed; 3458 3459 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3460 rsp_buffer_size, DMA_FROM_DEVICE); 3461 if (dma_mapping_error(dev, rsp_buffer_token)) { 3462 dev_err(dev, "Couldn't map login rsp buffer\n"); 3463 goto buf_rsp_map_failed; 3464 } 3465 3466 adapter->login_buf = login_buffer; 3467 adapter->login_buf_token = buffer_token; 3468 adapter->login_buf_sz = buffer_size; 3469 adapter->login_rsp_buf = login_rsp_buffer; 3470 adapter->login_rsp_buf_token = rsp_buffer_token; 3471 adapter->login_rsp_buf_sz = rsp_buffer_size; 3472 3473 login_buffer->len = cpu_to_be32(buffer_size); 3474 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3475 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3476 login_buffer->off_txcomp_subcrqs = 3477 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3478 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3479 login_buffer->off_rxcomp_subcrqs = 3480 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3481 sizeof(u64) * adapter->req_tx_queues); 3482 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3483 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3484 3485 tx_list_p = (__be64 *)((char *)login_buffer + 3486 sizeof(struct ibmvnic_login_buffer)); 3487 rx_list_p = (__be64 *)((char *)login_buffer + 3488 sizeof(struct ibmvnic_login_buffer) + 3489 sizeof(u64) * adapter->req_tx_queues); 3490 3491 for (i = 0; i < adapter->req_tx_queues; i++) { 3492 if (adapter->tx_scrq[i]) { 3493 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3494 crq_num); 3495 } 3496 } 3497 3498 for (i = 0; i < adapter->req_rx_queues; i++) { 3499 if (adapter->rx_scrq[i]) { 3500 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3501 crq_num); 3502 } 3503 } 3504 3505 /* Insert vNIC login client data */ 3506 vlcd = (struct vnic_login_client_data *) 3507 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3508 login_buffer->client_data_offset = 3509 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3510 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3511 3512 vnic_add_client_data(adapter, vlcd); 3513 3514 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3515 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3516 netdev_dbg(adapter->netdev, "%016lx\n", 3517 ((unsigned long int *)(adapter->login_buf))[i]); 3518 } 3519 3520 memset(&crq, 0, sizeof(crq)); 3521 crq.login.first = IBMVNIC_CRQ_CMD; 3522 crq.login.cmd = LOGIN; 3523 crq.login.ioba = cpu_to_be32(buffer_token); 3524 crq.login.len = cpu_to_be32(buffer_size); 3525 ibmvnic_send_crq(adapter, &crq); 3526 3527 return 0; 3528 3529 buf_rsp_map_failed: 3530 kfree(login_rsp_buffer); 3531 buf_rsp_alloc_failed: 3532 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3533 buf_map_failed: 3534 kfree(login_buffer); 3535 buf_alloc_failed: 3536 return -1; 3537 } 3538 3539 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3540 u32 len, u8 map_id) 3541 { 3542 union ibmvnic_crq crq; 3543 3544 memset(&crq, 0, sizeof(crq)); 3545 crq.request_map.first = IBMVNIC_CRQ_CMD; 3546 crq.request_map.cmd = REQUEST_MAP; 3547 crq.request_map.map_id = map_id; 3548 crq.request_map.ioba = cpu_to_be32(addr); 3549 crq.request_map.len = cpu_to_be32(len); 3550 return ibmvnic_send_crq(adapter, &crq); 3551 } 3552 3553 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3554 { 3555 union ibmvnic_crq crq; 3556 3557 memset(&crq, 0, sizeof(crq)); 3558 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3559 crq.request_unmap.cmd = REQUEST_UNMAP; 3560 crq.request_unmap.map_id = map_id; 3561 return ibmvnic_send_crq(adapter, &crq); 3562 } 3563 3564 static void send_map_query(struct ibmvnic_adapter *adapter) 3565 { 3566 union ibmvnic_crq crq; 3567 3568 memset(&crq, 0, sizeof(crq)); 3569 crq.query_map.first = IBMVNIC_CRQ_CMD; 3570 crq.query_map.cmd = QUERY_MAP; 3571 ibmvnic_send_crq(adapter, &crq); 3572 } 3573 3574 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3575 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3576 { 3577 union ibmvnic_crq crq; 3578 3579 atomic_set(&adapter->running_cap_crqs, 0); 3580 memset(&crq, 0, sizeof(crq)); 3581 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3582 crq.query_capability.cmd = QUERY_CAPABILITY; 3583 3584 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3585 atomic_inc(&adapter->running_cap_crqs); 3586 ibmvnic_send_crq(adapter, &crq); 3587 3588 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3589 atomic_inc(&adapter->running_cap_crqs); 3590 ibmvnic_send_crq(adapter, &crq); 3591 3592 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3593 atomic_inc(&adapter->running_cap_crqs); 3594 ibmvnic_send_crq(adapter, &crq); 3595 3596 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3597 atomic_inc(&adapter->running_cap_crqs); 3598 ibmvnic_send_crq(adapter, &crq); 3599 3600 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3601 atomic_inc(&adapter->running_cap_crqs); 3602 ibmvnic_send_crq(adapter, &crq); 3603 3604 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3605 atomic_inc(&adapter->running_cap_crqs); 3606 ibmvnic_send_crq(adapter, &crq); 3607 3608 crq.query_capability.capability = 3609 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3610 atomic_inc(&adapter->running_cap_crqs); 3611 ibmvnic_send_crq(adapter, &crq); 3612 3613 crq.query_capability.capability = 3614 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3615 atomic_inc(&adapter->running_cap_crqs); 3616 ibmvnic_send_crq(adapter, &crq); 3617 3618 crq.query_capability.capability = 3619 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3620 atomic_inc(&adapter->running_cap_crqs); 3621 ibmvnic_send_crq(adapter, &crq); 3622 3623 crq.query_capability.capability = 3624 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3625 atomic_inc(&adapter->running_cap_crqs); 3626 ibmvnic_send_crq(adapter, &crq); 3627 3628 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3629 atomic_inc(&adapter->running_cap_crqs); 3630 ibmvnic_send_crq(adapter, &crq); 3631 3632 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3633 atomic_inc(&adapter->running_cap_crqs); 3634 ibmvnic_send_crq(adapter, &crq); 3635 3636 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3637 atomic_inc(&adapter->running_cap_crqs); 3638 ibmvnic_send_crq(adapter, &crq); 3639 3640 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3641 atomic_inc(&adapter->running_cap_crqs); 3642 ibmvnic_send_crq(adapter, &crq); 3643 3644 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3645 atomic_inc(&adapter->running_cap_crqs); 3646 ibmvnic_send_crq(adapter, &crq); 3647 3648 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3649 atomic_inc(&adapter->running_cap_crqs); 3650 ibmvnic_send_crq(adapter, &crq); 3651 3652 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3653 atomic_inc(&adapter->running_cap_crqs); 3654 ibmvnic_send_crq(adapter, &crq); 3655 3656 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3657 atomic_inc(&adapter->running_cap_crqs); 3658 ibmvnic_send_crq(adapter, &crq); 3659 3660 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3661 atomic_inc(&adapter->running_cap_crqs); 3662 ibmvnic_send_crq(adapter, &crq); 3663 3664 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3665 atomic_inc(&adapter->running_cap_crqs); 3666 ibmvnic_send_crq(adapter, &crq); 3667 3668 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3669 atomic_inc(&adapter->running_cap_crqs); 3670 ibmvnic_send_crq(adapter, &crq); 3671 3672 crq.query_capability.capability = 3673 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3674 atomic_inc(&adapter->running_cap_crqs); 3675 ibmvnic_send_crq(adapter, &crq); 3676 3677 crq.query_capability.capability = 3678 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3679 atomic_inc(&adapter->running_cap_crqs); 3680 ibmvnic_send_crq(adapter, &crq); 3681 3682 crq.query_capability.capability = 3683 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3684 atomic_inc(&adapter->running_cap_crqs); 3685 ibmvnic_send_crq(adapter, &crq); 3686 3687 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3688 atomic_inc(&adapter->running_cap_crqs); 3689 ibmvnic_send_crq(adapter, &crq); 3690 } 3691 3692 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3693 struct ibmvnic_adapter *adapter) 3694 { 3695 struct device *dev = &adapter->vdev->dev; 3696 3697 if (crq->get_vpd_size_rsp.rc.code) { 3698 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3699 crq->get_vpd_size_rsp.rc.code); 3700 complete(&adapter->fw_done); 3701 return; 3702 } 3703 3704 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3705 complete(&adapter->fw_done); 3706 } 3707 3708 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3709 struct ibmvnic_adapter *adapter) 3710 { 3711 struct device *dev = &adapter->vdev->dev; 3712 unsigned char *substr = NULL; 3713 u8 fw_level_len = 0; 3714 3715 memset(adapter->fw_version, 0, 32); 3716 3717 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3718 DMA_FROM_DEVICE); 3719 3720 if (crq->get_vpd_rsp.rc.code) { 3721 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3722 crq->get_vpd_rsp.rc.code); 3723 goto complete; 3724 } 3725 3726 /* get the position of the firmware version info 3727 * located after the ASCII 'RM' substring in the buffer 3728 */ 3729 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3730 if (!substr) { 3731 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3732 goto complete; 3733 } 3734 3735 /* get length of firmware level ASCII substring */ 3736 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3737 fw_level_len = *(substr + 2); 3738 } else { 3739 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3740 goto complete; 3741 } 3742 3743 /* copy firmware version string from vpd into adapter */ 3744 if ((substr + 3 + fw_level_len) < 3745 (adapter->vpd->buff + adapter->vpd->len)) { 3746 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3747 } else { 3748 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3749 } 3750 3751 complete: 3752 if (adapter->fw_version[0] == '\0') 3753 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3754 complete(&adapter->fw_done); 3755 } 3756 3757 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3758 { 3759 struct device *dev = &adapter->vdev->dev; 3760 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3761 union ibmvnic_crq crq; 3762 int i; 3763 3764 dma_unmap_single(dev, adapter->ip_offload_tok, 3765 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3766 3767 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3768 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3769 netdev_dbg(adapter->netdev, "%016lx\n", 3770 ((unsigned long int *)(buf))[i]); 3771 3772 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3773 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3774 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3775 buf->tcp_ipv4_chksum); 3776 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3777 buf->tcp_ipv6_chksum); 3778 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3779 buf->udp_ipv4_chksum); 3780 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3781 buf->udp_ipv6_chksum); 3782 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3783 buf->large_tx_ipv4); 3784 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3785 buf->large_tx_ipv6); 3786 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3787 buf->large_rx_ipv4); 3788 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3789 buf->large_rx_ipv6); 3790 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3791 buf->max_ipv4_header_size); 3792 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3793 buf->max_ipv6_header_size); 3794 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3795 buf->max_tcp_header_size); 3796 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3797 buf->max_udp_header_size); 3798 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3799 buf->max_large_tx_size); 3800 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3801 buf->max_large_rx_size); 3802 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3803 buf->ipv6_extension_header); 3804 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3805 buf->tcp_pseudosum_req); 3806 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3807 buf->num_ipv6_ext_headers); 3808 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3809 buf->off_ipv6_ext_headers); 3810 3811 adapter->ip_offload_ctrl_tok = 3812 dma_map_single(dev, &adapter->ip_offload_ctrl, 3813 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3814 3815 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3816 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3817 return; 3818 } 3819 3820 adapter->ip_offload_ctrl.len = 3821 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3822 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3823 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3824 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3825 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3826 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3827 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3828 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3829 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3830 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3831 3832 /* large_rx disabled for now, additional features needed */ 3833 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3834 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3835 3836 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3837 3838 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3839 adapter->netdev->features |= NETIF_F_IP_CSUM; 3840 3841 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3842 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3843 3844 if ((adapter->netdev->features & 3845 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3846 adapter->netdev->features |= NETIF_F_RXCSUM; 3847 3848 if (buf->large_tx_ipv4) 3849 adapter->netdev->features |= NETIF_F_TSO; 3850 if (buf->large_tx_ipv6) 3851 adapter->netdev->features |= NETIF_F_TSO6; 3852 3853 adapter->netdev->hw_features |= adapter->netdev->features; 3854 3855 memset(&crq, 0, sizeof(crq)); 3856 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3857 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3858 crq.control_ip_offload.len = 3859 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3860 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3861 ibmvnic_send_crq(adapter, &crq); 3862 } 3863 3864 static const char *ibmvnic_fw_err_cause(u16 cause) 3865 { 3866 switch (cause) { 3867 case ADAPTER_PROBLEM: 3868 return "adapter problem"; 3869 case BUS_PROBLEM: 3870 return "bus problem"; 3871 case FW_PROBLEM: 3872 return "firmware problem"; 3873 case DD_PROBLEM: 3874 return "device driver problem"; 3875 case EEH_RECOVERY: 3876 return "EEH recovery"; 3877 case FW_UPDATED: 3878 return "firmware updated"; 3879 case LOW_MEMORY: 3880 return "low Memory"; 3881 default: 3882 return "unknown"; 3883 } 3884 } 3885 3886 static void handle_error_indication(union ibmvnic_crq *crq, 3887 struct ibmvnic_adapter *adapter) 3888 { 3889 struct device *dev = &adapter->vdev->dev; 3890 u16 cause; 3891 3892 cause = be16_to_cpu(crq->error_indication.error_cause); 3893 3894 dev_warn_ratelimited(dev, 3895 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3896 crq->error_indication.flags 3897 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3898 ibmvnic_fw_err_cause(cause)); 3899 3900 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3901 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3902 else 3903 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3904 } 3905 3906 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3907 struct ibmvnic_adapter *adapter) 3908 { 3909 struct net_device *netdev = adapter->netdev; 3910 struct device *dev = &adapter->vdev->dev; 3911 long rc; 3912 3913 rc = crq->change_mac_addr_rsp.rc.code; 3914 if (rc) { 3915 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3916 goto out; 3917 } 3918 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3919 ETH_ALEN); 3920 out: 3921 complete(&adapter->fw_done); 3922 return rc; 3923 } 3924 3925 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3926 struct ibmvnic_adapter *adapter) 3927 { 3928 struct device *dev = &adapter->vdev->dev; 3929 u64 *req_value; 3930 char *name; 3931 3932 atomic_dec(&adapter->running_cap_crqs); 3933 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3934 case REQ_TX_QUEUES: 3935 req_value = &adapter->req_tx_queues; 3936 name = "tx"; 3937 break; 3938 case REQ_RX_QUEUES: 3939 req_value = &adapter->req_rx_queues; 3940 name = "rx"; 3941 break; 3942 case REQ_RX_ADD_QUEUES: 3943 req_value = &adapter->req_rx_add_queues; 3944 name = "rx_add"; 3945 break; 3946 case REQ_TX_ENTRIES_PER_SUBCRQ: 3947 req_value = &adapter->req_tx_entries_per_subcrq; 3948 name = "tx_entries_per_subcrq"; 3949 break; 3950 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3951 req_value = &adapter->req_rx_add_entries_per_subcrq; 3952 name = "rx_add_entries_per_subcrq"; 3953 break; 3954 case REQ_MTU: 3955 req_value = &adapter->req_mtu; 3956 name = "mtu"; 3957 break; 3958 case PROMISC_REQUESTED: 3959 req_value = &adapter->promisc; 3960 name = "promisc"; 3961 break; 3962 default: 3963 dev_err(dev, "Got invalid cap request rsp %d\n", 3964 crq->request_capability.capability); 3965 return; 3966 } 3967 3968 switch (crq->request_capability_rsp.rc.code) { 3969 case SUCCESS: 3970 break; 3971 case PARTIALSUCCESS: 3972 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3973 *req_value, 3974 (long int)be64_to_cpu(crq->request_capability_rsp. 3975 number), name); 3976 3977 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3978 REQ_MTU) { 3979 pr_err("mtu of %llu is not supported. Reverting.\n", 3980 *req_value); 3981 *req_value = adapter->fallback.mtu; 3982 } else { 3983 *req_value = 3984 be64_to_cpu(crq->request_capability_rsp.number); 3985 } 3986 3987 ibmvnic_send_req_caps(adapter, 1); 3988 return; 3989 default: 3990 dev_err(dev, "Error %d in request cap rsp\n", 3991 crq->request_capability_rsp.rc.code); 3992 return; 3993 } 3994 3995 /* Done receiving requested capabilities, query IP offload support */ 3996 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3997 union ibmvnic_crq newcrq; 3998 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3999 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4000 &adapter->ip_offload_buf; 4001 4002 adapter->wait_capability = false; 4003 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4004 buf_sz, 4005 DMA_FROM_DEVICE); 4006 4007 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4008 if (!firmware_has_feature(FW_FEATURE_CMO)) 4009 dev_err(dev, "Couldn't map offload buffer\n"); 4010 return; 4011 } 4012 4013 memset(&newcrq, 0, sizeof(newcrq)); 4014 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4015 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4016 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4017 newcrq.query_ip_offload.ioba = 4018 cpu_to_be32(adapter->ip_offload_tok); 4019 4020 ibmvnic_send_crq(adapter, &newcrq); 4021 } 4022 } 4023 4024 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4025 struct ibmvnic_adapter *adapter) 4026 { 4027 struct device *dev = &adapter->vdev->dev; 4028 struct net_device *netdev = adapter->netdev; 4029 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4030 struct ibmvnic_login_buffer *login = adapter->login_buf; 4031 int i; 4032 4033 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4034 DMA_TO_DEVICE); 4035 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4036 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4037 4038 /* If the number of queues requested can't be allocated by the 4039 * server, the login response will return with code 1. We will need 4040 * to resend the login buffer with fewer queues requested. 4041 */ 4042 if (login_rsp_crq->generic.rc.code) { 4043 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4044 complete(&adapter->init_done); 4045 return 0; 4046 } 4047 4048 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4049 4050 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4051 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4052 netdev_dbg(adapter->netdev, "%016lx\n", 4053 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4054 } 4055 4056 /* Sanity checks */ 4057 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4058 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4059 adapter->req_rx_add_queues != 4060 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4061 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4062 ibmvnic_remove(adapter->vdev); 4063 return -EIO; 4064 } 4065 release_login_buffer(adapter); 4066 complete(&adapter->init_done); 4067 4068 return 0; 4069 } 4070 4071 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4072 struct ibmvnic_adapter *adapter) 4073 { 4074 struct device *dev = &adapter->vdev->dev; 4075 long rc; 4076 4077 rc = crq->request_unmap_rsp.rc.code; 4078 if (rc) 4079 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4080 } 4081 4082 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4083 struct ibmvnic_adapter *adapter) 4084 { 4085 struct net_device *netdev = adapter->netdev; 4086 struct device *dev = &adapter->vdev->dev; 4087 long rc; 4088 4089 rc = crq->query_map_rsp.rc.code; 4090 if (rc) { 4091 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4092 return; 4093 } 4094 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4095 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4096 crq->query_map_rsp.free_pages); 4097 } 4098 4099 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4100 struct ibmvnic_adapter *adapter) 4101 { 4102 struct net_device *netdev = adapter->netdev; 4103 struct device *dev = &adapter->vdev->dev; 4104 long rc; 4105 4106 atomic_dec(&adapter->running_cap_crqs); 4107 netdev_dbg(netdev, "Outstanding queries: %d\n", 4108 atomic_read(&adapter->running_cap_crqs)); 4109 rc = crq->query_capability.rc.code; 4110 if (rc) { 4111 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4112 goto out; 4113 } 4114 4115 switch (be16_to_cpu(crq->query_capability.capability)) { 4116 case MIN_TX_QUEUES: 4117 adapter->min_tx_queues = 4118 be64_to_cpu(crq->query_capability.number); 4119 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4120 adapter->min_tx_queues); 4121 break; 4122 case MIN_RX_QUEUES: 4123 adapter->min_rx_queues = 4124 be64_to_cpu(crq->query_capability.number); 4125 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4126 adapter->min_rx_queues); 4127 break; 4128 case MIN_RX_ADD_QUEUES: 4129 adapter->min_rx_add_queues = 4130 be64_to_cpu(crq->query_capability.number); 4131 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4132 adapter->min_rx_add_queues); 4133 break; 4134 case MAX_TX_QUEUES: 4135 adapter->max_tx_queues = 4136 be64_to_cpu(crq->query_capability.number); 4137 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4138 adapter->max_tx_queues); 4139 break; 4140 case MAX_RX_QUEUES: 4141 adapter->max_rx_queues = 4142 be64_to_cpu(crq->query_capability.number); 4143 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4144 adapter->max_rx_queues); 4145 break; 4146 case MAX_RX_ADD_QUEUES: 4147 adapter->max_rx_add_queues = 4148 be64_to_cpu(crq->query_capability.number); 4149 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4150 adapter->max_rx_add_queues); 4151 break; 4152 case MIN_TX_ENTRIES_PER_SUBCRQ: 4153 adapter->min_tx_entries_per_subcrq = 4154 be64_to_cpu(crq->query_capability.number); 4155 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4156 adapter->min_tx_entries_per_subcrq); 4157 break; 4158 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4159 adapter->min_rx_add_entries_per_subcrq = 4160 be64_to_cpu(crq->query_capability.number); 4161 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4162 adapter->min_rx_add_entries_per_subcrq); 4163 break; 4164 case MAX_TX_ENTRIES_PER_SUBCRQ: 4165 adapter->max_tx_entries_per_subcrq = 4166 be64_to_cpu(crq->query_capability.number); 4167 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4168 adapter->max_tx_entries_per_subcrq); 4169 break; 4170 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4171 adapter->max_rx_add_entries_per_subcrq = 4172 be64_to_cpu(crq->query_capability.number); 4173 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4174 adapter->max_rx_add_entries_per_subcrq); 4175 break; 4176 case TCP_IP_OFFLOAD: 4177 adapter->tcp_ip_offload = 4178 be64_to_cpu(crq->query_capability.number); 4179 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4180 adapter->tcp_ip_offload); 4181 break; 4182 case PROMISC_SUPPORTED: 4183 adapter->promisc_supported = 4184 be64_to_cpu(crq->query_capability.number); 4185 netdev_dbg(netdev, "promisc_supported = %lld\n", 4186 adapter->promisc_supported); 4187 break; 4188 case MIN_MTU: 4189 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4190 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4191 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4192 break; 4193 case MAX_MTU: 4194 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4195 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4196 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4197 break; 4198 case MAX_MULTICAST_FILTERS: 4199 adapter->max_multicast_filters = 4200 be64_to_cpu(crq->query_capability.number); 4201 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4202 adapter->max_multicast_filters); 4203 break; 4204 case VLAN_HEADER_INSERTION: 4205 adapter->vlan_header_insertion = 4206 be64_to_cpu(crq->query_capability.number); 4207 if (adapter->vlan_header_insertion) 4208 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4209 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4210 adapter->vlan_header_insertion); 4211 break; 4212 case RX_VLAN_HEADER_INSERTION: 4213 adapter->rx_vlan_header_insertion = 4214 be64_to_cpu(crq->query_capability.number); 4215 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4216 adapter->rx_vlan_header_insertion); 4217 break; 4218 case MAX_TX_SG_ENTRIES: 4219 adapter->max_tx_sg_entries = 4220 be64_to_cpu(crq->query_capability.number); 4221 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4222 adapter->max_tx_sg_entries); 4223 break; 4224 case RX_SG_SUPPORTED: 4225 adapter->rx_sg_supported = 4226 be64_to_cpu(crq->query_capability.number); 4227 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4228 adapter->rx_sg_supported); 4229 break; 4230 case OPT_TX_COMP_SUB_QUEUES: 4231 adapter->opt_tx_comp_sub_queues = 4232 be64_to_cpu(crq->query_capability.number); 4233 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4234 adapter->opt_tx_comp_sub_queues); 4235 break; 4236 case OPT_RX_COMP_QUEUES: 4237 adapter->opt_rx_comp_queues = 4238 be64_to_cpu(crq->query_capability.number); 4239 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4240 adapter->opt_rx_comp_queues); 4241 break; 4242 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4243 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4244 be64_to_cpu(crq->query_capability.number); 4245 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4246 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4247 break; 4248 case OPT_TX_ENTRIES_PER_SUBCRQ: 4249 adapter->opt_tx_entries_per_subcrq = 4250 be64_to_cpu(crq->query_capability.number); 4251 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4252 adapter->opt_tx_entries_per_subcrq); 4253 break; 4254 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4255 adapter->opt_rxba_entries_per_subcrq = 4256 be64_to_cpu(crq->query_capability.number); 4257 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4258 adapter->opt_rxba_entries_per_subcrq); 4259 break; 4260 case TX_RX_DESC_REQ: 4261 adapter->tx_rx_desc_req = crq->query_capability.number; 4262 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4263 adapter->tx_rx_desc_req); 4264 break; 4265 4266 default: 4267 netdev_err(netdev, "Got invalid cap rsp %d\n", 4268 crq->query_capability.capability); 4269 } 4270 4271 out: 4272 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4273 adapter->wait_capability = false; 4274 ibmvnic_send_req_caps(adapter, 0); 4275 } 4276 } 4277 4278 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4279 { 4280 union ibmvnic_crq crq; 4281 int rc; 4282 4283 memset(&crq, 0, sizeof(crq)); 4284 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4285 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4286 init_completion(&adapter->fw_done); 4287 rc = ibmvnic_send_crq(adapter, &crq); 4288 if (rc) 4289 return rc; 4290 wait_for_completion(&adapter->fw_done); 4291 return adapter->fw_done_rc ? -EIO : 0; 4292 } 4293 4294 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4295 struct ibmvnic_adapter *adapter) 4296 { 4297 struct net_device *netdev = adapter->netdev; 4298 int rc; 4299 4300 rc = crq->query_phys_parms_rsp.rc.code; 4301 if (rc) { 4302 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4303 return rc; 4304 } 4305 switch (cpu_to_be32(crq->query_phys_parms_rsp.speed)) { 4306 case IBMVNIC_10MBPS: 4307 adapter->speed = SPEED_10; 4308 break; 4309 case IBMVNIC_100MBPS: 4310 adapter->speed = SPEED_100; 4311 break; 4312 case IBMVNIC_1GBPS: 4313 adapter->speed = SPEED_1000; 4314 break; 4315 case IBMVNIC_10GBP: 4316 adapter->speed = SPEED_10000; 4317 break; 4318 case IBMVNIC_25GBPS: 4319 adapter->speed = SPEED_25000; 4320 break; 4321 case IBMVNIC_40GBPS: 4322 adapter->speed = SPEED_40000; 4323 break; 4324 case IBMVNIC_50GBPS: 4325 adapter->speed = SPEED_50000; 4326 break; 4327 case IBMVNIC_100GBPS: 4328 adapter->speed = SPEED_100000; 4329 break; 4330 default: 4331 netdev_warn(netdev, "Unknown speed 0x%08x\n", 4332 cpu_to_be32(crq->query_phys_parms_rsp.speed)); 4333 adapter->speed = SPEED_UNKNOWN; 4334 } 4335 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4336 adapter->duplex = DUPLEX_FULL; 4337 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4338 adapter->duplex = DUPLEX_HALF; 4339 else 4340 adapter->duplex = DUPLEX_UNKNOWN; 4341 4342 return rc; 4343 } 4344 4345 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4346 struct ibmvnic_adapter *adapter) 4347 { 4348 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4349 struct net_device *netdev = adapter->netdev; 4350 struct device *dev = &adapter->vdev->dev; 4351 u64 *u64_crq = (u64 *)crq; 4352 long rc; 4353 4354 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4355 (unsigned long int)cpu_to_be64(u64_crq[0]), 4356 (unsigned long int)cpu_to_be64(u64_crq[1])); 4357 switch (gen_crq->first) { 4358 case IBMVNIC_CRQ_INIT_RSP: 4359 switch (gen_crq->cmd) { 4360 case IBMVNIC_CRQ_INIT: 4361 dev_info(dev, "Partner initialized\n"); 4362 adapter->from_passive_init = true; 4363 adapter->failover_pending = false; 4364 if (!completion_done(&adapter->init_done)) { 4365 complete(&adapter->init_done); 4366 adapter->init_done_rc = -EIO; 4367 } 4368 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4369 break; 4370 case IBMVNIC_CRQ_INIT_COMPLETE: 4371 dev_info(dev, "Partner initialization complete\n"); 4372 adapter->crq.active = true; 4373 send_version_xchg(adapter); 4374 break; 4375 default: 4376 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4377 } 4378 return; 4379 case IBMVNIC_CRQ_XPORT_EVENT: 4380 netif_carrier_off(netdev); 4381 adapter->crq.active = false; 4382 if (adapter->resetting) 4383 adapter->force_reset_recovery = true; 4384 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4385 dev_info(dev, "Migrated, re-enabling adapter\n"); 4386 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4387 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4388 dev_info(dev, "Backing device failover detected\n"); 4389 adapter->failover_pending = true; 4390 } else { 4391 /* The adapter lost the connection */ 4392 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4393 gen_crq->cmd); 4394 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4395 } 4396 return; 4397 case IBMVNIC_CRQ_CMD_RSP: 4398 break; 4399 default: 4400 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4401 gen_crq->first); 4402 return; 4403 } 4404 4405 switch (gen_crq->cmd) { 4406 case VERSION_EXCHANGE_RSP: 4407 rc = crq->version_exchange_rsp.rc.code; 4408 if (rc) { 4409 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4410 break; 4411 } 4412 dev_info(dev, "Partner protocol version is %d\n", 4413 crq->version_exchange_rsp.version); 4414 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4415 ibmvnic_version) 4416 ibmvnic_version = 4417 be16_to_cpu(crq->version_exchange_rsp.version); 4418 send_cap_queries(adapter); 4419 break; 4420 case QUERY_CAPABILITY_RSP: 4421 handle_query_cap_rsp(crq, adapter); 4422 break; 4423 case QUERY_MAP_RSP: 4424 handle_query_map_rsp(crq, adapter); 4425 break; 4426 case REQUEST_MAP_RSP: 4427 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4428 complete(&adapter->fw_done); 4429 break; 4430 case REQUEST_UNMAP_RSP: 4431 handle_request_unmap_rsp(crq, adapter); 4432 break; 4433 case REQUEST_CAPABILITY_RSP: 4434 handle_request_cap_rsp(crq, adapter); 4435 break; 4436 case LOGIN_RSP: 4437 netdev_dbg(netdev, "Got Login Response\n"); 4438 handle_login_rsp(crq, adapter); 4439 break; 4440 case LOGICAL_LINK_STATE_RSP: 4441 netdev_dbg(netdev, 4442 "Got Logical Link State Response, state: %d rc: %d\n", 4443 crq->logical_link_state_rsp.link_state, 4444 crq->logical_link_state_rsp.rc.code); 4445 adapter->logical_link_state = 4446 crq->logical_link_state_rsp.link_state; 4447 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4448 complete(&adapter->init_done); 4449 break; 4450 case LINK_STATE_INDICATION: 4451 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4452 adapter->phys_link_state = 4453 crq->link_state_indication.phys_link_state; 4454 adapter->logical_link_state = 4455 crq->link_state_indication.logical_link_state; 4456 break; 4457 case CHANGE_MAC_ADDR_RSP: 4458 netdev_dbg(netdev, "Got MAC address change Response\n"); 4459 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4460 break; 4461 case ERROR_INDICATION: 4462 netdev_dbg(netdev, "Got Error Indication\n"); 4463 handle_error_indication(crq, adapter); 4464 break; 4465 case REQUEST_STATISTICS_RSP: 4466 netdev_dbg(netdev, "Got Statistics Response\n"); 4467 complete(&adapter->stats_done); 4468 break; 4469 case QUERY_IP_OFFLOAD_RSP: 4470 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4471 handle_query_ip_offload_rsp(adapter); 4472 break; 4473 case MULTICAST_CTRL_RSP: 4474 netdev_dbg(netdev, "Got multicast control Response\n"); 4475 break; 4476 case CONTROL_IP_OFFLOAD_RSP: 4477 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4478 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4479 sizeof(adapter->ip_offload_ctrl), 4480 DMA_TO_DEVICE); 4481 complete(&adapter->init_done); 4482 break; 4483 case COLLECT_FW_TRACE_RSP: 4484 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4485 complete(&adapter->fw_done); 4486 break; 4487 case GET_VPD_SIZE_RSP: 4488 handle_vpd_size_rsp(crq, adapter); 4489 break; 4490 case GET_VPD_RSP: 4491 handle_vpd_rsp(crq, adapter); 4492 break; 4493 case QUERY_PHYS_PARMS_RSP: 4494 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4495 complete(&adapter->fw_done); 4496 break; 4497 default: 4498 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4499 gen_crq->cmd); 4500 } 4501 } 4502 4503 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4504 { 4505 struct ibmvnic_adapter *adapter = instance; 4506 4507 tasklet_schedule(&adapter->tasklet); 4508 return IRQ_HANDLED; 4509 } 4510 4511 static void ibmvnic_tasklet(void *data) 4512 { 4513 struct ibmvnic_adapter *adapter = data; 4514 struct ibmvnic_crq_queue *queue = &adapter->crq; 4515 union ibmvnic_crq *crq; 4516 unsigned long flags; 4517 bool done = false; 4518 4519 spin_lock_irqsave(&queue->lock, flags); 4520 while (!done) { 4521 /* Pull all the valid messages off the CRQ */ 4522 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4523 ibmvnic_handle_crq(crq, adapter); 4524 crq->generic.first = 0; 4525 } 4526 4527 /* remain in tasklet until all 4528 * capabilities responses are received 4529 */ 4530 if (!adapter->wait_capability) 4531 done = true; 4532 } 4533 /* if capabilities CRQ's were sent in this tasklet, the following 4534 * tasklet must wait until all responses are received 4535 */ 4536 if (atomic_read(&adapter->running_cap_crqs) != 0) 4537 adapter->wait_capability = true; 4538 spin_unlock_irqrestore(&queue->lock, flags); 4539 } 4540 4541 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4542 { 4543 struct vio_dev *vdev = adapter->vdev; 4544 int rc; 4545 4546 do { 4547 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4548 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4549 4550 if (rc) 4551 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4552 4553 return rc; 4554 } 4555 4556 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4557 { 4558 struct ibmvnic_crq_queue *crq = &adapter->crq; 4559 struct device *dev = &adapter->vdev->dev; 4560 struct vio_dev *vdev = adapter->vdev; 4561 int rc; 4562 4563 /* Close the CRQ */ 4564 do { 4565 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4566 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4567 4568 /* Clean out the queue */ 4569 memset(crq->msgs, 0, PAGE_SIZE); 4570 crq->cur = 0; 4571 crq->active = false; 4572 4573 /* And re-open it again */ 4574 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4575 crq->msg_token, PAGE_SIZE); 4576 4577 if (rc == H_CLOSED) 4578 /* Adapter is good, but other end is not ready */ 4579 dev_warn(dev, "Partner adapter not ready\n"); 4580 else if (rc != 0) 4581 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4582 4583 return rc; 4584 } 4585 4586 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4587 { 4588 struct ibmvnic_crq_queue *crq = &adapter->crq; 4589 struct vio_dev *vdev = adapter->vdev; 4590 long rc; 4591 4592 if (!crq->msgs) 4593 return; 4594 4595 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4596 free_irq(vdev->irq, adapter); 4597 tasklet_kill(&adapter->tasklet); 4598 do { 4599 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4600 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4601 4602 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4603 DMA_BIDIRECTIONAL); 4604 free_page((unsigned long)crq->msgs); 4605 crq->msgs = NULL; 4606 crq->active = false; 4607 } 4608 4609 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4610 { 4611 struct ibmvnic_crq_queue *crq = &adapter->crq; 4612 struct device *dev = &adapter->vdev->dev; 4613 struct vio_dev *vdev = adapter->vdev; 4614 int rc, retrc = -ENOMEM; 4615 4616 if (crq->msgs) 4617 return 0; 4618 4619 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4620 /* Should we allocate more than one page? */ 4621 4622 if (!crq->msgs) 4623 return -ENOMEM; 4624 4625 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4626 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4627 DMA_BIDIRECTIONAL); 4628 if (dma_mapping_error(dev, crq->msg_token)) 4629 goto map_failed; 4630 4631 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4632 crq->msg_token, PAGE_SIZE); 4633 4634 if (rc == H_RESOURCE) 4635 /* maybe kexecing and resource is busy. try a reset */ 4636 rc = ibmvnic_reset_crq(adapter); 4637 retrc = rc; 4638 4639 if (rc == H_CLOSED) { 4640 dev_warn(dev, "Partner adapter not ready\n"); 4641 } else if (rc) { 4642 dev_warn(dev, "Error %d opening adapter\n", rc); 4643 goto reg_crq_failed; 4644 } 4645 4646 retrc = 0; 4647 4648 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4649 (unsigned long)adapter); 4650 4651 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4652 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4653 adapter); 4654 if (rc) { 4655 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4656 vdev->irq, rc); 4657 goto req_irq_failed; 4658 } 4659 4660 rc = vio_enable_interrupts(vdev); 4661 if (rc) { 4662 dev_err(dev, "Error %d enabling interrupts\n", rc); 4663 goto req_irq_failed; 4664 } 4665 4666 crq->cur = 0; 4667 spin_lock_init(&crq->lock); 4668 4669 return retrc; 4670 4671 req_irq_failed: 4672 tasklet_kill(&adapter->tasklet); 4673 do { 4674 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4675 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4676 reg_crq_failed: 4677 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4678 map_failed: 4679 free_page((unsigned long)crq->msgs); 4680 crq->msgs = NULL; 4681 return retrc; 4682 } 4683 4684 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4685 { 4686 struct device *dev = &adapter->vdev->dev; 4687 unsigned long timeout = msecs_to_jiffies(30000); 4688 u64 old_num_rx_queues, old_num_tx_queues; 4689 int rc; 4690 4691 adapter->from_passive_init = false; 4692 4693 old_num_rx_queues = adapter->req_rx_queues; 4694 old_num_tx_queues = adapter->req_tx_queues; 4695 4696 reinit_completion(&adapter->init_done); 4697 adapter->init_done_rc = 0; 4698 ibmvnic_send_crq_init(adapter); 4699 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4700 dev_err(dev, "Initialization sequence timed out\n"); 4701 return -1; 4702 } 4703 4704 if (adapter->init_done_rc) { 4705 release_crq_queue(adapter); 4706 return adapter->init_done_rc; 4707 } 4708 4709 if (adapter->from_passive_init) { 4710 adapter->state = VNIC_OPEN; 4711 adapter->from_passive_init = false; 4712 return -1; 4713 } 4714 4715 if (adapter->resetting && !adapter->wait_for_reset && 4716 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4717 if (adapter->req_rx_queues != old_num_rx_queues || 4718 adapter->req_tx_queues != old_num_tx_queues) { 4719 release_sub_crqs(adapter, 0); 4720 rc = init_sub_crqs(adapter); 4721 } else { 4722 rc = reset_sub_crq_queues(adapter); 4723 } 4724 } else { 4725 rc = init_sub_crqs(adapter); 4726 } 4727 4728 if (rc) { 4729 dev_err(dev, "Initialization of sub crqs failed\n"); 4730 release_crq_queue(adapter); 4731 return rc; 4732 } 4733 4734 rc = init_sub_crq_irqs(adapter); 4735 if (rc) { 4736 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4737 release_crq_queue(adapter); 4738 } 4739 4740 return rc; 4741 } 4742 4743 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4744 { 4745 struct device *dev = &adapter->vdev->dev; 4746 unsigned long timeout = msecs_to_jiffies(30000); 4747 int rc; 4748 4749 adapter->from_passive_init = false; 4750 4751 adapter->init_done_rc = 0; 4752 ibmvnic_send_crq_init(adapter); 4753 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4754 dev_err(dev, "Initialization sequence timed out\n"); 4755 return -1; 4756 } 4757 4758 if (adapter->init_done_rc) { 4759 release_crq_queue(adapter); 4760 return adapter->init_done_rc; 4761 } 4762 4763 if (adapter->from_passive_init) { 4764 adapter->state = VNIC_OPEN; 4765 adapter->from_passive_init = false; 4766 return -1; 4767 } 4768 4769 rc = init_sub_crqs(adapter); 4770 if (rc) { 4771 dev_err(dev, "Initialization of sub crqs failed\n"); 4772 release_crq_queue(adapter); 4773 return rc; 4774 } 4775 4776 rc = init_sub_crq_irqs(adapter); 4777 if (rc) { 4778 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4779 release_crq_queue(adapter); 4780 } 4781 4782 return rc; 4783 } 4784 4785 static struct device_attribute dev_attr_failover; 4786 4787 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4788 { 4789 struct ibmvnic_adapter *adapter; 4790 struct net_device *netdev; 4791 unsigned char *mac_addr_p; 4792 int rc; 4793 4794 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4795 dev->unit_address); 4796 4797 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4798 VETH_MAC_ADDR, NULL); 4799 if (!mac_addr_p) { 4800 dev_err(&dev->dev, 4801 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4802 __FILE__, __LINE__); 4803 return 0; 4804 } 4805 4806 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4807 IBMVNIC_MAX_QUEUES); 4808 if (!netdev) 4809 return -ENOMEM; 4810 4811 adapter = netdev_priv(netdev); 4812 adapter->state = VNIC_PROBING; 4813 dev_set_drvdata(&dev->dev, netdev); 4814 adapter->vdev = dev; 4815 adapter->netdev = netdev; 4816 4817 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4818 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4819 netdev->irq = dev->irq; 4820 netdev->netdev_ops = &ibmvnic_netdev_ops; 4821 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4822 SET_NETDEV_DEV(netdev, &dev->dev); 4823 4824 spin_lock_init(&adapter->stats_lock); 4825 4826 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4827 INIT_LIST_HEAD(&adapter->rwi_list); 4828 spin_lock_init(&adapter->rwi_lock); 4829 init_completion(&adapter->init_done); 4830 adapter->resetting = false; 4831 4832 adapter->mac_change_pending = false; 4833 4834 do { 4835 rc = init_crq_queue(adapter); 4836 if (rc) { 4837 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4838 rc); 4839 goto ibmvnic_init_fail; 4840 } 4841 4842 rc = ibmvnic_init(adapter); 4843 if (rc && rc != EAGAIN) 4844 goto ibmvnic_init_fail; 4845 } while (rc == EAGAIN); 4846 4847 rc = init_stats_buffers(adapter); 4848 if (rc) 4849 goto ibmvnic_init_fail; 4850 4851 rc = init_stats_token(adapter); 4852 if (rc) 4853 goto ibmvnic_stats_fail; 4854 4855 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4856 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4857 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4858 4859 rc = device_create_file(&dev->dev, &dev_attr_failover); 4860 if (rc) 4861 goto ibmvnic_dev_file_err; 4862 4863 netif_carrier_off(netdev); 4864 rc = register_netdev(netdev); 4865 if (rc) { 4866 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4867 goto ibmvnic_register_fail; 4868 } 4869 dev_info(&dev->dev, "ibmvnic registered\n"); 4870 4871 adapter->state = VNIC_PROBED; 4872 4873 adapter->wait_for_reset = false; 4874 4875 return 0; 4876 4877 ibmvnic_register_fail: 4878 device_remove_file(&dev->dev, &dev_attr_failover); 4879 4880 ibmvnic_dev_file_err: 4881 release_stats_token(adapter); 4882 4883 ibmvnic_stats_fail: 4884 release_stats_buffers(adapter); 4885 4886 ibmvnic_init_fail: 4887 release_sub_crqs(adapter, 1); 4888 release_crq_queue(adapter); 4889 free_netdev(netdev); 4890 4891 return rc; 4892 } 4893 4894 static int ibmvnic_remove(struct vio_dev *dev) 4895 { 4896 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4897 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4898 4899 adapter->state = VNIC_REMOVING; 4900 rtnl_lock(); 4901 unregister_netdevice(netdev); 4902 4903 release_resources(adapter); 4904 release_sub_crqs(adapter, 1); 4905 release_crq_queue(adapter); 4906 4907 release_stats_token(adapter); 4908 release_stats_buffers(adapter); 4909 4910 adapter->state = VNIC_REMOVED; 4911 4912 rtnl_unlock(); 4913 device_remove_file(&dev->dev, &dev_attr_failover); 4914 free_netdev(netdev); 4915 dev_set_drvdata(&dev->dev, NULL); 4916 4917 return 0; 4918 } 4919 4920 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4921 const char *buf, size_t count) 4922 { 4923 struct net_device *netdev = dev_get_drvdata(dev); 4924 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4925 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4926 __be64 session_token; 4927 long rc; 4928 4929 if (!sysfs_streq(buf, "1")) 4930 return -EINVAL; 4931 4932 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4933 H_GET_SESSION_TOKEN, 0, 0, 0); 4934 if (rc) { 4935 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4936 rc); 4937 return -EINVAL; 4938 } 4939 4940 session_token = (__be64)retbuf[0]; 4941 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4942 be64_to_cpu(session_token)); 4943 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4944 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4945 if (rc) { 4946 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4947 rc); 4948 return -EINVAL; 4949 } 4950 4951 return count; 4952 } 4953 4954 static DEVICE_ATTR_WO(failover); 4955 4956 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4957 { 4958 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4959 struct ibmvnic_adapter *adapter; 4960 struct iommu_table *tbl; 4961 unsigned long ret = 0; 4962 int i; 4963 4964 tbl = get_iommu_table_base(&vdev->dev); 4965 4966 /* netdev inits at probe time along with the structures we need below*/ 4967 if (!netdev) 4968 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4969 4970 adapter = netdev_priv(netdev); 4971 4972 ret += PAGE_SIZE; /* the crq message queue */ 4973 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4974 4975 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4976 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4977 4978 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4979 i++) 4980 ret += adapter->rx_pool[i].size * 4981 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4982 4983 return ret; 4984 } 4985 4986 static int ibmvnic_resume(struct device *dev) 4987 { 4988 struct net_device *netdev = dev_get_drvdata(dev); 4989 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4990 4991 if (adapter->state != VNIC_OPEN) 4992 return 0; 4993 4994 tasklet_schedule(&adapter->tasklet); 4995 4996 return 0; 4997 } 4998 4999 static const struct vio_device_id ibmvnic_device_table[] = { 5000 {"network", "IBM,vnic"}, 5001 {"", "" } 5002 }; 5003 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5004 5005 static const struct dev_pm_ops ibmvnic_pm_ops = { 5006 .resume = ibmvnic_resume 5007 }; 5008 5009 static struct vio_driver ibmvnic_driver = { 5010 .id_table = ibmvnic_device_table, 5011 .probe = ibmvnic_probe, 5012 .remove = ibmvnic_remove, 5013 .get_desired_dma = ibmvnic_get_desired_dma, 5014 .name = ibmvnic_driver_name, 5015 .pm = &ibmvnic_pm_ops, 5016 }; 5017 5018 /* module functions */ 5019 static int __init ibmvnic_module_init(void) 5020 { 5021 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5022 IBMVNIC_DRIVER_VERSION); 5023 5024 return vio_register_driver(&ibmvnic_driver); 5025 } 5026 5027 static void __exit ibmvnic_module_exit(void) 5028 { 5029 vio_unregister_driver(&ibmvnic_driver); 5030 } 5031 5032 module_init(ibmvnic_module_init); 5033 module_exit(ibmvnic_module_exit); 5034