1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static int send_request_unmap(struct ibmvnic_adapter *, u8); 114 static int send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 120 static void release_crq_queue(struct ibmvnic_adapter *); 121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 122 static int init_crq_queue(struct ibmvnic_adapter *adapter); 123 124 struct ibmvnic_stat { 125 char name[ETH_GSTRING_LEN]; 126 int offset; 127 }; 128 129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 130 offsetof(struct ibmvnic_statistics, stat)) 131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 132 133 static const struct ibmvnic_stat ibmvnic_stats[] = { 134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 156 }; 157 158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 159 unsigned long length, unsigned long *number, 160 unsigned long *irq) 161 { 162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 163 long rc; 164 165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 166 *number = retbuf[0]; 167 *irq = retbuf[1]; 168 169 return rc; 170 } 171 172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 173 struct ibmvnic_long_term_buff *ltb, int size) 174 { 175 struct device *dev = &adapter->vdev->dev; 176 int rc; 177 178 ltb->size = size; 179 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 180 GFP_KERNEL); 181 182 if (!ltb->buff) { 183 dev_err(dev, "Couldn't alloc long term buffer\n"); 184 return -ENOMEM; 185 } 186 ltb->map_id = adapter->map_id; 187 adapter->map_id++; 188 189 init_completion(&adapter->fw_done); 190 rc = send_request_map(adapter, ltb->addr, 191 ltb->size, ltb->map_id); 192 if (rc) { 193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 194 return rc; 195 } 196 wait_for_completion(&adapter->fw_done); 197 198 if (adapter->fw_done_rc) { 199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 200 adapter->fw_done_rc); 201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 202 return -1; 203 } 204 return 0; 205 } 206 207 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 208 struct ibmvnic_long_term_buff *ltb) 209 { 210 struct device *dev = &adapter->vdev->dev; 211 212 if (!ltb->buff) 213 return; 214 215 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 216 adapter->reset_reason != VNIC_RESET_MOBILITY) 217 send_request_unmap(adapter, ltb->map_id); 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 } 220 221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 222 struct ibmvnic_long_term_buff *ltb) 223 { 224 int rc; 225 226 memset(ltb->buff, 0, ltb->size); 227 228 init_completion(&adapter->fw_done); 229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 230 if (rc) 231 return rc; 232 wait_for_completion(&adapter->fw_done); 233 234 if (adapter->fw_done_rc) { 235 dev_info(&adapter->vdev->dev, 236 "Reset failed, attempting to free and reallocate buffer\n"); 237 free_long_term_buff(adapter, ltb); 238 return alloc_long_term_buff(adapter, ltb, ltb->size); 239 } 240 return 0; 241 } 242 243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 244 { 245 int i; 246 247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 248 i++) 249 adapter->rx_pool[i].active = 0; 250 } 251 252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 253 struct ibmvnic_rx_pool *pool) 254 { 255 int count = pool->size - atomic_read(&pool->available); 256 struct device *dev = &adapter->vdev->dev; 257 int buffers_added = 0; 258 unsigned long lpar_rc; 259 union sub_crq sub_crq; 260 struct sk_buff *skb; 261 unsigned int offset; 262 dma_addr_t dma_addr; 263 unsigned char *dst; 264 u64 *handle_array; 265 int shift = 0; 266 int index; 267 int i; 268 269 if (!pool->active) 270 return; 271 272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 273 be32_to_cpu(adapter->login_rsp_buf-> 274 off_rxadd_subcrqs)); 275 276 for (i = 0; i < count; ++i) { 277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 278 if (!skb) { 279 dev_err(dev, "Couldn't replenish rx buff\n"); 280 adapter->replenish_no_mem++; 281 break; 282 } 283 284 index = pool->free_map[pool->next_free]; 285 286 if (pool->rx_buff[index].skb) 287 dev_err(dev, "Inconsistent free_map!\n"); 288 289 /* Copy the skb to the long term mapped DMA buffer */ 290 offset = index * pool->buff_size; 291 dst = pool->long_term_buff.buff + offset; 292 memset(dst, 0, pool->buff_size); 293 dma_addr = pool->long_term_buff.addr + offset; 294 pool->rx_buff[index].data = dst; 295 296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 297 pool->rx_buff[index].dma = dma_addr; 298 pool->rx_buff[index].skb = skb; 299 pool->rx_buff[index].pool_index = pool->index; 300 pool->rx_buff[index].size = pool->buff_size; 301 302 memset(&sub_crq, 0, sizeof(sub_crq)); 303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 304 sub_crq.rx_add.correlator = 305 cpu_to_be64((u64)&pool->rx_buff[index]); 306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 308 309 /* The length field of the sCRQ is defined to be 24 bits so the 310 * buffer size needs to be left shifted by a byte before it is 311 * converted to big endian to prevent the last byte from being 312 * truncated. 313 */ 314 #ifdef __LITTLE_ENDIAN__ 315 shift = 8; 316 #endif 317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 318 319 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 320 &sub_crq); 321 if (lpar_rc != H_SUCCESS) 322 goto failure; 323 324 buffers_added++; 325 adapter->replenish_add_buff_success++; 326 pool->next_free = (pool->next_free + 1) % pool->size; 327 } 328 atomic_add(buffers_added, &pool->available); 329 return; 330 331 failure: 332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 334 pool->free_map[pool->next_free] = index; 335 pool->rx_buff[index].skb = NULL; 336 337 dev_kfree_skb_any(skb); 338 adapter->replenish_add_buff_failure++; 339 atomic_add(buffers_added, &pool->available); 340 341 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 342 /* Disable buffer pool replenishment and report carrier off if 343 * queue is closed or pending failover. 344 * Firmware guarantees that a signal will be sent to the 345 * driver, triggering a reset. 346 */ 347 deactivate_rx_pools(adapter); 348 netif_carrier_off(adapter->netdev); 349 } 350 } 351 352 static void replenish_pools(struct ibmvnic_adapter *adapter) 353 { 354 int i; 355 356 adapter->replenish_task_cycles++; 357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 358 i++) { 359 if (adapter->rx_pool[i].active) 360 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 361 } 362 } 363 364 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 365 { 366 kfree(adapter->tx_stats_buffers); 367 kfree(adapter->rx_stats_buffers); 368 adapter->tx_stats_buffers = NULL; 369 adapter->rx_stats_buffers = NULL; 370 } 371 372 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 373 { 374 adapter->tx_stats_buffers = 375 kcalloc(IBMVNIC_MAX_QUEUES, 376 sizeof(struct ibmvnic_tx_queue_stats), 377 GFP_KERNEL); 378 if (!adapter->tx_stats_buffers) 379 return -ENOMEM; 380 381 adapter->rx_stats_buffers = 382 kcalloc(IBMVNIC_MAX_QUEUES, 383 sizeof(struct ibmvnic_rx_queue_stats), 384 GFP_KERNEL); 385 if (!adapter->rx_stats_buffers) 386 return -ENOMEM; 387 388 return 0; 389 } 390 391 static void release_stats_token(struct ibmvnic_adapter *adapter) 392 { 393 struct device *dev = &adapter->vdev->dev; 394 395 if (!adapter->stats_token) 396 return; 397 398 dma_unmap_single(dev, adapter->stats_token, 399 sizeof(struct ibmvnic_statistics), 400 DMA_FROM_DEVICE); 401 adapter->stats_token = 0; 402 } 403 404 static int init_stats_token(struct ibmvnic_adapter *adapter) 405 { 406 struct device *dev = &adapter->vdev->dev; 407 dma_addr_t stok; 408 409 stok = dma_map_single(dev, &adapter->stats, 410 sizeof(struct ibmvnic_statistics), 411 DMA_FROM_DEVICE); 412 if (dma_mapping_error(dev, stok)) { 413 dev_err(dev, "Couldn't map stats buffer\n"); 414 return -1; 415 } 416 417 adapter->stats_token = stok; 418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 419 return 0; 420 } 421 422 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 423 { 424 struct ibmvnic_rx_pool *rx_pool; 425 int rx_scrqs; 426 int i, j, rc; 427 u64 *size_array; 428 429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 431 432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 433 for (i = 0; i < rx_scrqs; i++) { 434 rx_pool = &adapter->rx_pool[i]; 435 436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 437 438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 439 free_long_term_buff(adapter, &rx_pool->long_term_buff); 440 rx_pool->buff_size = be64_to_cpu(size_array[i]); 441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 442 rx_pool->size * 443 rx_pool->buff_size); 444 } else { 445 rc = reset_long_term_buff(adapter, 446 &rx_pool->long_term_buff); 447 } 448 449 if (rc) 450 return rc; 451 452 for (j = 0; j < rx_pool->size; j++) 453 rx_pool->free_map[j] = j; 454 455 memset(rx_pool->rx_buff, 0, 456 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 457 458 atomic_set(&rx_pool->available, 0); 459 rx_pool->next_alloc = 0; 460 rx_pool->next_free = 0; 461 rx_pool->active = 1; 462 } 463 464 return 0; 465 } 466 467 static void release_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 int i, j; 471 472 if (!adapter->rx_pool) 473 return; 474 475 for (i = 0; i < adapter->num_active_rx_pools; i++) { 476 rx_pool = &adapter->rx_pool[i]; 477 478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 479 480 kfree(rx_pool->free_map); 481 free_long_term_buff(adapter, &rx_pool->long_term_buff); 482 483 if (!rx_pool->rx_buff) 484 continue; 485 486 for (j = 0; j < rx_pool->size; j++) { 487 if (rx_pool->rx_buff[j].skb) { 488 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 489 rx_pool->rx_buff[j].skb = NULL; 490 } 491 } 492 493 kfree(rx_pool->rx_buff); 494 } 495 496 kfree(adapter->rx_pool); 497 adapter->rx_pool = NULL; 498 adapter->num_active_rx_pools = 0; 499 } 500 501 static int init_rx_pools(struct net_device *netdev) 502 { 503 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 504 struct device *dev = &adapter->vdev->dev; 505 struct ibmvnic_rx_pool *rx_pool; 506 int rxadd_subcrqs; 507 u64 *size_array; 508 int i, j; 509 510 rxadd_subcrqs = 511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 514 515 adapter->rx_pool = kcalloc(rxadd_subcrqs, 516 sizeof(struct ibmvnic_rx_pool), 517 GFP_KERNEL); 518 if (!adapter->rx_pool) { 519 dev_err(dev, "Failed to allocate rx pools\n"); 520 return -1; 521 } 522 523 adapter->num_active_rx_pools = rxadd_subcrqs; 524 525 for (i = 0; i < rxadd_subcrqs; i++) { 526 rx_pool = &adapter->rx_pool[i]; 527 528 netdev_dbg(adapter->netdev, 529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 530 i, adapter->req_rx_add_entries_per_subcrq, 531 be64_to_cpu(size_array[i])); 532 533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 534 rx_pool->index = i; 535 rx_pool->buff_size = be64_to_cpu(size_array[i]); 536 rx_pool->active = 1; 537 538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 539 GFP_KERNEL); 540 if (!rx_pool->free_map) { 541 release_rx_pools(adapter); 542 return -1; 543 } 544 545 rx_pool->rx_buff = kcalloc(rx_pool->size, 546 sizeof(struct ibmvnic_rx_buff), 547 GFP_KERNEL); 548 if (!rx_pool->rx_buff) { 549 dev_err(dev, "Couldn't alloc rx buffers\n"); 550 release_rx_pools(adapter); 551 return -1; 552 } 553 554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 555 rx_pool->size * rx_pool->buff_size)) { 556 release_rx_pools(adapter); 557 return -1; 558 } 559 560 for (j = 0; j < rx_pool->size; ++j) 561 rx_pool->free_map[j] = j; 562 563 atomic_set(&rx_pool->available, 0); 564 rx_pool->next_alloc = 0; 565 rx_pool->next_free = 0; 566 } 567 568 return 0; 569 } 570 571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 572 struct ibmvnic_tx_pool *tx_pool) 573 { 574 int rc, i; 575 576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 577 if (rc) 578 return rc; 579 580 memset(tx_pool->tx_buff, 0, 581 tx_pool->num_buffers * 582 sizeof(struct ibmvnic_tx_buff)); 583 584 for (i = 0; i < tx_pool->num_buffers; i++) 585 tx_pool->free_map[i] = i; 586 587 tx_pool->consumer_index = 0; 588 tx_pool->producer_index = 0; 589 590 return 0; 591 } 592 593 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 594 { 595 int tx_scrqs; 596 int i, rc; 597 598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 599 for (i = 0; i < tx_scrqs; i++) { 600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 601 if (rc) 602 return rc; 603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 604 if (rc) 605 return rc; 606 } 607 608 return 0; 609 } 610 611 static void release_vpd_data(struct ibmvnic_adapter *adapter) 612 { 613 if (!adapter->vpd) 614 return; 615 616 kfree(adapter->vpd->buff); 617 kfree(adapter->vpd); 618 619 adapter->vpd = NULL; 620 } 621 622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 623 struct ibmvnic_tx_pool *tx_pool) 624 { 625 kfree(tx_pool->tx_buff); 626 kfree(tx_pool->free_map); 627 free_long_term_buff(adapter, &tx_pool->long_term_buff); 628 } 629 630 static void release_tx_pools(struct ibmvnic_adapter *adapter) 631 { 632 int i; 633 634 if (!adapter->tx_pool) 635 return; 636 637 for (i = 0; i < adapter->num_active_tx_pools; i++) { 638 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 639 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 640 } 641 642 kfree(adapter->tx_pool); 643 adapter->tx_pool = NULL; 644 kfree(adapter->tso_pool); 645 adapter->tso_pool = NULL; 646 adapter->num_active_tx_pools = 0; 647 } 648 649 static int init_one_tx_pool(struct net_device *netdev, 650 struct ibmvnic_tx_pool *tx_pool, 651 int num_entries, int buf_size) 652 { 653 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 654 int i; 655 656 tx_pool->tx_buff = kcalloc(num_entries, 657 sizeof(struct ibmvnic_tx_buff), 658 GFP_KERNEL); 659 if (!tx_pool->tx_buff) 660 return -1; 661 662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 663 num_entries * buf_size)) 664 return -1; 665 666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 667 if (!tx_pool->free_map) 668 return -1; 669 670 for (i = 0; i < num_entries; i++) 671 tx_pool->free_map[i] = i; 672 673 tx_pool->consumer_index = 0; 674 tx_pool->producer_index = 0; 675 tx_pool->num_buffers = num_entries; 676 tx_pool->buf_size = buf_size; 677 678 return 0; 679 } 680 681 static int init_tx_pools(struct net_device *netdev) 682 { 683 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 684 int tx_subcrqs; 685 int i, rc; 686 687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 688 adapter->tx_pool = kcalloc(tx_subcrqs, 689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 690 if (!adapter->tx_pool) 691 return -1; 692 693 adapter->tso_pool = kcalloc(tx_subcrqs, 694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 695 if (!adapter->tso_pool) 696 return -1; 697 698 adapter->num_active_tx_pools = tx_subcrqs; 699 700 for (i = 0; i < tx_subcrqs; i++) { 701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 702 adapter->req_tx_entries_per_subcrq, 703 adapter->req_mtu + VLAN_HLEN); 704 if (rc) { 705 release_tx_pools(adapter); 706 return rc; 707 } 708 709 init_one_tx_pool(netdev, &adapter->tso_pool[i], 710 IBMVNIC_TSO_BUFS, 711 IBMVNIC_TSO_BUF_SZ); 712 if (rc) { 713 release_tx_pools(adapter); 714 return rc; 715 } 716 } 717 718 return 0; 719 } 720 721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 722 { 723 int i; 724 725 if (adapter->napi_enabled) 726 return; 727 728 for (i = 0; i < adapter->req_rx_queues; i++) 729 napi_enable(&adapter->napi[i]); 730 731 adapter->napi_enabled = true; 732 } 733 734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 735 { 736 int i; 737 738 if (!adapter->napi_enabled) 739 return; 740 741 for (i = 0; i < adapter->req_rx_queues; i++) { 742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 743 napi_disable(&adapter->napi[i]); 744 } 745 746 adapter->napi_enabled = false; 747 } 748 749 static int init_napi(struct ibmvnic_adapter *adapter) 750 { 751 int i; 752 753 adapter->napi = kcalloc(adapter->req_rx_queues, 754 sizeof(struct napi_struct), GFP_KERNEL); 755 if (!adapter->napi) 756 return -ENOMEM; 757 758 for (i = 0; i < adapter->req_rx_queues; i++) { 759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 760 netif_napi_add(adapter->netdev, &adapter->napi[i], 761 ibmvnic_poll, NAPI_POLL_WEIGHT); 762 } 763 764 adapter->num_active_rx_napi = adapter->req_rx_queues; 765 return 0; 766 } 767 768 static void release_napi(struct ibmvnic_adapter *adapter) 769 { 770 int i; 771 772 if (!adapter->napi) 773 return; 774 775 for (i = 0; i < adapter->num_active_rx_napi; i++) { 776 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 777 netif_napi_del(&adapter->napi[i]); 778 } 779 780 kfree(adapter->napi); 781 adapter->napi = NULL; 782 adapter->num_active_rx_napi = 0; 783 adapter->napi_enabled = false; 784 } 785 786 static int ibmvnic_login(struct net_device *netdev) 787 { 788 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 789 unsigned long timeout = msecs_to_jiffies(30000); 790 int retry_count = 0; 791 bool retry; 792 int rc; 793 794 do { 795 retry = false; 796 if (retry_count > IBMVNIC_MAX_QUEUES) { 797 netdev_warn(netdev, "Login attempts exceeded\n"); 798 return -1; 799 } 800 801 adapter->init_done_rc = 0; 802 reinit_completion(&adapter->init_done); 803 rc = send_login(adapter); 804 if (rc) { 805 netdev_warn(netdev, "Unable to login\n"); 806 return rc; 807 } 808 809 if (!wait_for_completion_timeout(&adapter->init_done, 810 timeout)) { 811 netdev_warn(netdev, "Login timed out\n"); 812 return -1; 813 } 814 815 if (adapter->init_done_rc == PARTIALSUCCESS) { 816 retry_count++; 817 release_sub_crqs(adapter, 1); 818 819 retry = true; 820 netdev_dbg(netdev, 821 "Received partial success, retrying...\n"); 822 adapter->init_done_rc = 0; 823 reinit_completion(&adapter->init_done); 824 send_cap_queries(adapter); 825 if (!wait_for_completion_timeout(&adapter->init_done, 826 timeout)) { 827 netdev_warn(netdev, 828 "Capabilities query timed out\n"); 829 return -1; 830 } 831 832 rc = init_sub_crqs(adapter); 833 if (rc) { 834 netdev_warn(netdev, 835 "SCRQ initialization failed\n"); 836 return -1; 837 } 838 839 rc = init_sub_crq_irqs(adapter); 840 if (rc) { 841 netdev_warn(netdev, 842 "SCRQ irq initialization failed\n"); 843 return -1; 844 } 845 } else if (adapter->init_done_rc) { 846 netdev_warn(netdev, "Adapter login failed\n"); 847 return -1; 848 } 849 } while (retry); 850 851 /* handle pending MAC address changes after successful login */ 852 if (adapter->mac_change_pending) { 853 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 854 adapter->mac_change_pending = false; 855 } 856 857 return 0; 858 } 859 860 static void release_login_buffer(struct ibmvnic_adapter *adapter) 861 { 862 kfree(adapter->login_buf); 863 adapter->login_buf = NULL; 864 } 865 866 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 867 { 868 kfree(adapter->login_rsp_buf); 869 adapter->login_rsp_buf = NULL; 870 } 871 872 static void release_resources(struct ibmvnic_adapter *adapter) 873 { 874 release_vpd_data(adapter); 875 876 release_tx_pools(adapter); 877 release_rx_pools(adapter); 878 879 release_napi(adapter); 880 release_login_rsp_buffer(adapter); 881 } 882 883 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 884 { 885 struct net_device *netdev = adapter->netdev; 886 unsigned long timeout = msecs_to_jiffies(30000); 887 union ibmvnic_crq crq; 888 bool resend; 889 int rc; 890 891 netdev_dbg(netdev, "setting link state %d\n", link_state); 892 893 memset(&crq, 0, sizeof(crq)); 894 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 895 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 896 crq.logical_link_state.link_state = link_state; 897 898 do { 899 resend = false; 900 901 reinit_completion(&adapter->init_done); 902 rc = ibmvnic_send_crq(adapter, &crq); 903 if (rc) { 904 netdev_err(netdev, "Failed to set link state\n"); 905 return rc; 906 } 907 908 if (!wait_for_completion_timeout(&adapter->init_done, 909 timeout)) { 910 netdev_err(netdev, "timeout setting link state\n"); 911 return -1; 912 } 913 914 if (adapter->init_done_rc == 1) { 915 /* Partuial success, delay and re-send */ 916 mdelay(1000); 917 resend = true; 918 } else if (adapter->init_done_rc) { 919 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 920 adapter->init_done_rc); 921 return adapter->init_done_rc; 922 } 923 } while (resend); 924 925 return 0; 926 } 927 928 static int set_real_num_queues(struct net_device *netdev) 929 { 930 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 931 int rc; 932 933 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 934 adapter->req_tx_queues, adapter->req_rx_queues); 935 936 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 937 if (rc) { 938 netdev_err(netdev, "failed to set the number of tx queues\n"); 939 return rc; 940 } 941 942 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 943 if (rc) 944 netdev_err(netdev, "failed to set the number of rx queues\n"); 945 946 return rc; 947 } 948 949 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 950 { 951 struct device *dev = &adapter->vdev->dev; 952 union ibmvnic_crq crq; 953 int len = 0; 954 int rc; 955 956 if (adapter->vpd->buff) 957 len = adapter->vpd->len; 958 959 init_completion(&adapter->fw_done); 960 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 961 crq.get_vpd_size.cmd = GET_VPD_SIZE; 962 rc = ibmvnic_send_crq(adapter, &crq); 963 if (rc) 964 return rc; 965 wait_for_completion(&adapter->fw_done); 966 967 if (!adapter->vpd->len) 968 return -ENODATA; 969 970 if (!adapter->vpd->buff) 971 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 972 else if (adapter->vpd->len != len) 973 adapter->vpd->buff = 974 krealloc(adapter->vpd->buff, 975 adapter->vpd->len, GFP_KERNEL); 976 977 if (!adapter->vpd->buff) { 978 dev_err(dev, "Could allocate VPD buffer\n"); 979 return -ENOMEM; 980 } 981 982 adapter->vpd->dma_addr = 983 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 984 DMA_FROM_DEVICE); 985 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 986 dev_err(dev, "Could not map VPD buffer\n"); 987 kfree(adapter->vpd->buff); 988 adapter->vpd->buff = NULL; 989 return -ENOMEM; 990 } 991 992 reinit_completion(&adapter->fw_done); 993 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 994 crq.get_vpd.cmd = GET_VPD; 995 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 996 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 997 rc = ibmvnic_send_crq(adapter, &crq); 998 if (rc) { 999 kfree(adapter->vpd->buff); 1000 adapter->vpd->buff = NULL; 1001 return rc; 1002 } 1003 wait_for_completion(&adapter->fw_done); 1004 1005 return 0; 1006 } 1007 1008 static int init_resources(struct ibmvnic_adapter *adapter) 1009 { 1010 struct net_device *netdev = adapter->netdev; 1011 int rc; 1012 1013 rc = set_real_num_queues(netdev); 1014 if (rc) 1015 return rc; 1016 1017 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1018 if (!adapter->vpd) 1019 return -ENOMEM; 1020 1021 /* Vital Product Data (VPD) */ 1022 rc = ibmvnic_get_vpd(adapter); 1023 if (rc) { 1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1025 return rc; 1026 } 1027 1028 adapter->map_id = 1; 1029 1030 rc = init_napi(adapter); 1031 if (rc) 1032 return rc; 1033 1034 send_map_query(adapter); 1035 1036 rc = init_rx_pools(netdev); 1037 if (rc) 1038 return rc; 1039 1040 rc = init_tx_pools(netdev); 1041 return rc; 1042 } 1043 1044 static int __ibmvnic_open(struct net_device *netdev) 1045 { 1046 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1047 enum vnic_state prev_state = adapter->state; 1048 int i, rc; 1049 1050 adapter->state = VNIC_OPENING; 1051 replenish_pools(adapter); 1052 ibmvnic_napi_enable(adapter); 1053 1054 /* We're ready to receive frames, enable the sub-crq interrupts and 1055 * set the logical link state to up 1056 */ 1057 for (i = 0; i < adapter->req_rx_queues; i++) { 1058 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1059 if (prev_state == VNIC_CLOSED) 1060 enable_irq(adapter->rx_scrq[i]->irq); 1061 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1062 } 1063 1064 for (i = 0; i < adapter->req_tx_queues; i++) { 1065 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1066 if (prev_state == VNIC_CLOSED) 1067 enable_irq(adapter->tx_scrq[i]->irq); 1068 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1069 } 1070 1071 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1072 if (rc) { 1073 for (i = 0; i < adapter->req_rx_queues; i++) 1074 napi_disable(&adapter->napi[i]); 1075 release_resources(adapter); 1076 return rc; 1077 } 1078 1079 netif_tx_start_all_queues(netdev); 1080 1081 if (prev_state == VNIC_CLOSED) { 1082 for (i = 0; i < adapter->req_rx_queues; i++) 1083 napi_schedule(&adapter->napi[i]); 1084 } 1085 1086 adapter->state = VNIC_OPEN; 1087 return rc; 1088 } 1089 1090 static int ibmvnic_open(struct net_device *netdev) 1091 { 1092 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1093 int rc; 1094 1095 /* If device failover is pending, just set device state and return. 1096 * Device operation will be handled by reset routine. 1097 */ 1098 if (adapter->failover_pending) { 1099 adapter->state = VNIC_OPEN; 1100 return 0; 1101 } 1102 1103 if (adapter->state != VNIC_CLOSED) { 1104 rc = ibmvnic_login(netdev); 1105 if (rc) 1106 return rc; 1107 1108 rc = init_resources(adapter); 1109 if (rc) { 1110 netdev_err(netdev, "failed to initialize resources\n"); 1111 release_resources(adapter); 1112 return rc; 1113 } 1114 } 1115 1116 rc = __ibmvnic_open(netdev); 1117 netif_carrier_on(netdev); 1118 1119 return rc; 1120 } 1121 1122 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1123 { 1124 struct ibmvnic_rx_pool *rx_pool; 1125 struct ibmvnic_rx_buff *rx_buff; 1126 u64 rx_entries; 1127 int rx_scrqs; 1128 int i, j; 1129 1130 if (!adapter->rx_pool) 1131 return; 1132 1133 rx_scrqs = adapter->num_active_rx_pools; 1134 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1135 1136 /* Free any remaining skbs in the rx buffer pools */ 1137 for (i = 0; i < rx_scrqs; i++) { 1138 rx_pool = &adapter->rx_pool[i]; 1139 if (!rx_pool || !rx_pool->rx_buff) 1140 continue; 1141 1142 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1143 for (j = 0; j < rx_entries; j++) { 1144 rx_buff = &rx_pool->rx_buff[j]; 1145 if (rx_buff && rx_buff->skb) { 1146 dev_kfree_skb_any(rx_buff->skb); 1147 rx_buff->skb = NULL; 1148 } 1149 } 1150 } 1151 } 1152 1153 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1154 struct ibmvnic_tx_pool *tx_pool) 1155 { 1156 struct ibmvnic_tx_buff *tx_buff; 1157 u64 tx_entries; 1158 int i; 1159 1160 if (!tx_pool || !tx_pool->tx_buff) 1161 return; 1162 1163 tx_entries = tx_pool->num_buffers; 1164 1165 for (i = 0; i < tx_entries; i++) { 1166 tx_buff = &tx_pool->tx_buff[i]; 1167 if (tx_buff && tx_buff->skb) { 1168 dev_kfree_skb_any(tx_buff->skb); 1169 tx_buff->skb = NULL; 1170 } 1171 } 1172 } 1173 1174 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1175 { 1176 int tx_scrqs; 1177 int i; 1178 1179 if (!adapter->tx_pool || !adapter->tso_pool) 1180 return; 1181 1182 tx_scrqs = adapter->num_active_tx_pools; 1183 1184 /* Free any remaining skbs in the tx buffer pools */ 1185 for (i = 0; i < tx_scrqs; i++) { 1186 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1187 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1188 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1189 } 1190 } 1191 1192 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1193 { 1194 struct net_device *netdev = adapter->netdev; 1195 int i; 1196 1197 if (adapter->tx_scrq) { 1198 for (i = 0; i < adapter->req_tx_queues; i++) 1199 if (adapter->tx_scrq[i]->irq) { 1200 netdev_dbg(netdev, 1201 "Disabling tx_scrq[%d] irq\n", i); 1202 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1203 disable_irq(adapter->tx_scrq[i]->irq); 1204 } 1205 } 1206 1207 if (adapter->rx_scrq) { 1208 for (i = 0; i < adapter->req_rx_queues; i++) { 1209 if (adapter->rx_scrq[i]->irq) { 1210 netdev_dbg(netdev, 1211 "Disabling rx_scrq[%d] irq\n", i); 1212 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1213 disable_irq(adapter->rx_scrq[i]->irq); 1214 } 1215 } 1216 } 1217 } 1218 1219 static void ibmvnic_cleanup(struct net_device *netdev) 1220 { 1221 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1222 1223 /* ensure that transmissions are stopped if called by do_reset */ 1224 if (adapter->resetting) 1225 netif_tx_disable(netdev); 1226 else 1227 netif_tx_stop_all_queues(netdev); 1228 1229 ibmvnic_napi_disable(adapter); 1230 ibmvnic_disable_irqs(adapter); 1231 1232 clean_rx_pools(adapter); 1233 clean_tx_pools(adapter); 1234 } 1235 1236 static int __ibmvnic_close(struct net_device *netdev) 1237 { 1238 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1239 int rc = 0; 1240 1241 adapter->state = VNIC_CLOSING; 1242 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1243 if (rc) 1244 return rc; 1245 adapter->state = VNIC_CLOSED; 1246 return 0; 1247 } 1248 1249 static int ibmvnic_close(struct net_device *netdev) 1250 { 1251 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1252 int rc; 1253 1254 /* If device failover is pending, just set device state and return. 1255 * Device operation will be handled by reset routine. 1256 */ 1257 if (adapter->failover_pending) { 1258 adapter->state = VNIC_CLOSED; 1259 return 0; 1260 } 1261 1262 rc = __ibmvnic_close(netdev); 1263 ibmvnic_cleanup(netdev); 1264 1265 return rc; 1266 } 1267 1268 /** 1269 * build_hdr_data - creates L2/L3/L4 header data buffer 1270 * @hdr_field - bitfield determining needed headers 1271 * @skb - socket buffer 1272 * @hdr_len - array of header lengths 1273 * @tot_len - total length of data 1274 * 1275 * Reads hdr_field to determine which headers are needed by firmware. 1276 * Builds a buffer containing these headers. Saves individual header 1277 * lengths and total buffer length to be used to build descriptors. 1278 */ 1279 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1280 int *hdr_len, u8 *hdr_data) 1281 { 1282 int len = 0; 1283 u8 *hdr; 1284 1285 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1286 hdr_len[0] = sizeof(struct vlan_ethhdr); 1287 else 1288 hdr_len[0] = sizeof(struct ethhdr); 1289 1290 if (skb->protocol == htons(ETH_P_IP)) { 1291 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1292 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1293 hdr_len[2] = tcp_hdrlen(skb); 1294 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1295 hdr_len[2] = sizeof(struct udphdr); 1296 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1297 hdr_len[1] = sizeof(struct ipv6hdr); 1298 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1299 hdr_len[2] = tcp_hdrlen(skb); 1300 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1301 hdr_len[2] = sizeof(struct udphdr); 1302 } else if (skb->protocol == htons(ETH_P_ARP)) { 1303 hdr_len[1] = arp_hdr_len(skb->dev); 1304 hdr_len[2] = 0; 1305 } 1306 1307 memset(hdr_data, 0, 120); 1308 if ((hdr_field >> 6) & 1) { 1309 hdr = skb_mac_header(skb); 1310 memcpy(hdr_data, hdr, hdr_len[0]); 1311 len += hdr_len[0]; 1312 } 1313 1314 if ((hdr_field >> 5) & 1) { 1315 hdr = skb_network_header(skb); 1316 memcpy(hdr_data + len, hdr, hdr_len[1]); 1317 len += hdr_len[1]; 1318 } 1319 1320 if ((hdr_field >> 4) & 1) { 1321 hdr = skb_transport_header(skb); 1322 memcpy(hdr_data + len, hdr, hdr_len[2]); 1323 len += hdr_len[2]; 1324 } 1325 return len; 1326 } 1327 1328 /** 1329 * create_hdr_descs - create header and header extension descriptors 1330 * @hdr_field - bitfield determining needed headers 1331 * @data - buffer containing header data 1332 * @len - length of data buffer 1333 * @hdr_len - array of individual header lengths 1334 * @scrq_arr - descriptor array 1335 * 1336 * Creates header and, if needed, header extension descriptors and 1337 * places them in a descriptor array, scrq_arr 1338 */ 1339 1340 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1341 union sub_crq *scrq_arr) 1342 { 1343 union sub_crq hdr_desc; 1344 int tmp_len = len; 1345 int num_descs = 0; 1346 u8 *data, *cur; 1347 int tmp; 1348 1349 while (tmp_len > 0) { 1350 cur = hdr_data + len - tmp_len; 1351 1352 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1353 if (cur != hdr_data) { 1354 data = hdr_desc.hdr_ext.data; 1355 tmp = tmp_len > 29 ? 29 : tmp_len; 1356 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1357 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1358 hdr_desc.hdr_ext.len = tmp; 1359 } else { 1360 data = hdr_desc.hdr.data; 1361 tmp = tmp_len > 24 ? 24 : tmp_len; 1362 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1363 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1364 hdr_desc.hdr.len = tmp; 1365 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1366 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1367 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1368 hdr_desc.hdr.flag = hdr_field << 1; 1369 } 1370 memcpy(data, cur, tmp); 1371 tmp_len -= tmp; 1372 *scrq_arr = hdr_desc; 1373 scrq_arr++; 1374 num_descs++; 1375 } 1376 1377 return num_descs; 1378 } 1379 1380 /** 1381 * build_hdr_descs_arr - build a header descriptor array 1382 * @skb - socket buffer 1383 * @num_entries - number of descriptors to be sent 1384 * @subcrq - first TX descriptor 1385 * @hdr_field - bit field determining which headers will be sent 1386 * 1387 * This function will build a TX descriptor array with applicable 1388 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1389 */ 1390 1391 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1392 int *num_entries, u8 hdr_field) 1393 { 1394 int hdr_len[3] = {0, 0, 0}; 1395 int tot_len; 1396 u8 *hdr_data = txbuff->hdr_data; 1397 1398 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1399 txbuff->hdr_data); 1400 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1401 txbuff->indir_arr + 1); 1402 } 1403 1404 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1405 struct net_device *netdev) 1406 { 1407 /* For some backing devices, mishandling of small packets 1408 * can result in a loss of connection or TX stall. Device 1409 * architects recommend that no packet should be smaller 1410 * than the minimum MTU value provided to the driver, so 1411 * pad any packets to that length 1412 */ 1413 if (skb->len < netdev->min_mtu) 1414 return skb_put_padto(skb, netdev->min_mtu); 1415 1416 return 0; 1417 } 1418 1419 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1420 { 1421 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1422 int queue_num = skb_get_queue_mapping(skb); 1423 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1424 struct device *dev = &adapter->vdev->dev; 1425 struct ibmvnic_tx_buff *tx_buff = NULL; 1426 struct ibmvnic_sub_crq_queue *tx_scrq; 1427 struct ibmvnic_tx_pool *tx_pool; 1428 unsigned int tx_send_failed = 0; 1429 unsigned int tx_map_failed = 0; 1430 unsigned int tx_dropped = 0; 1431 unsigned int tx_packets = 0; 1432 unsigned int tx_bytes = 0; 1433 dma_addr_t data_dma_addr; 1434 struct netdev_queue *txq; 1435 unsigned long lpar_rc; 1436 union sub_crq tx_crq; 1437 unsigned int offset; 1438 int num_entries = 1; 1439 unsigned char *dst; 1440 u64 *handle_array; 1441 int index = 0; 1442 u8 proto = 0; 1443 netdev_tx_t ret = NETDEV_TX_OK; 1444 1445 if (adapter->resetting) { 1446 if (!netif_subqueue_stopped(netdev, skb)) 1447 netif_stop_subqueue(netdev, queue_num); 1448 dev_kfree_skb_any(skb); 1449 1450 tx_send_failed++; 1451 tx_dropped++; 1452 ret = NETDEV_TX_OK; 1453 goto out; 1454 } 1455 1456 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1457 tx_dropped++; 1458 tx_send_failed++; 1459 ret = NETDEV_TX_OK; 1460 goto out; 1461 } 1462 if (skb_is_gso(skb)) 1463 tx_pool = &adapter->tso_pool[queue_num]; 1464 else 1465 tx_pool = &adapter->tx_pool[queue_num]; 1466 1467 tx_scrq = adapter->tx_scrq[queue_num]; 1468 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1469 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1470 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1471 1472 index = tx_pool->free_map[tx_pool->consumer_index]; 1473 1474 if (index == IBMVNIC_INVALID_MAP) { 1475 dev_kfree_skb_any(skb); 1476 tx_send_failed++; 1477 tx_dropped++; 1478 ret = NETDEV_TX_OK; 1479 goto out; 1480 } 1481 1482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1483 1484 offset = index * tx_pool->buf_size; 1485 dst = tx_pool->long_term_buff.buff + offset; 1486 memset(dst, 0, tx_pool->buf_size); 1487 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1488 1489 if (skb_shinfo(skb)->nr_frags) { 1490 int cur, i; 1491 1492 /* Copy the head */ 1493 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1494 cur = skb_headlen(skb); 1495 1496 /* Copy the frags */ 1497 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1498 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1499 1500 memcpy(dst + cur, 1501 page_address(skb_frag_page(frag)) + 1502 frag->page_offset, skb_frag_size(frag)); 1503 cur += skb_frag_size(frag); 1504 } 1505 } else { 1506 skb_copy_from_linear_data(skb, dst, skb->len); 1507 } 1508 1509 tx_pool->consumer_index = 1510 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1511 1512 tx_buff = &tx_pool->tx_buff[index]; 1513 tx_buff->skb = skb; 1514 tx_buff->data_dma[0] = data_dma_addr; 1515 tx_buff->data_len[0] = skb->len; 1516 tx_buff->index = index; 1517 tx_buff->pool_index = queue_num; 1518 tx_buff->last_frag = true; 1519 1520 memset(&tx_crq, 0, sizeof(tx_crq)); 1521 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1522 tx_crq.v1.type = IBMVNIC_TX_DESC; 1523 tx_crq.v1.n_crq_elem = 1; 1524 tx_crq.v1.n_sge = 1; 1525 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1526 1527 if (skb_is_gso(skb)) 1528 tx_crq.v1.correlator = 1529 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1530 else 1531 tx_crq.v1.correlator = cpu_to_be32(index); 1532 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1533 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1534 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1535 1536 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1537 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1538 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1539 } 1540 1541 if (skb->protocol == htons(ETH_P_IP)) { 1542 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1543 proto = ip_hdr(skb)->protocol; 1544 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1546 proto = ipv6_hdr(skb)->nexthdr; 1547 } 1548 1549 if (proto == IPPROTO_TCP) 1550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1551 else if (proto == IPPROTO_UDP) 1552 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1553 1554 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1556 hdrs += 2; 1557 } 1558 if (skb_is_gso(skb)) { 1559 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1560 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1561 hdrs += 2; 1562 } 1563 /* determine if l2/3/4 headers are sent to firmware */ 1564 if ((*hdrs >> 7) & 1) { 1565 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1566 tx_crq.v1.n_crq_elem = num_entries; 1567 tx_buff->num_entries = num_entries; 1568 tx_buff->indir_arr[0] = tx_crq; 1569 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1570 sizeof(tx_buff->indir_arr), 1571 DMA_TO_DEVICE); 1572 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1573 dev_kfree_skb_any(skb); 1574 tx_buff->skb = NULL; 1575 if (!firmware_has_feature(FW_FEATURE_CMO)) 1576 dev_err(dev, "tx: unable to map descriptor array\n"); 1577 tx_map_failed++; 1578 tx_dropped++; 1579 ret = NETDEV_TX_OK; 1580 goto tx_err_out; 1581 } 1582 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1583 (u64)tx_buff->indir_dma, 1584 (u64)num_entries); 1585 } else { 1586 tx_buff->num_entries = num_entries; 1587 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1588 &tx_crq); 1589 } 1590 if (lpar_rc != H_SUCCESS) { 1591 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1592 dev_err_ratelimited(dev, "tx: send failed\n"); 1593 dev_kfree_skb_any(skb); 1594 tx_buff->skb = NULL; 1595 1596 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1597 /* Disable TX and report carrier off if queue is closed 1598 * or pending failover. 1599 * Firmware guarantees that a signal will be sent to the 1600 * driver, triggering a reset or some other action. 1601 */ 1602 netif_tx_stop_all_queues(netdev); 1603 netif_carrier_off(netdev); 1604 } 1605 1606 tx_send_failed++; 1607 tx_dropped++; 1608 ret = NETDEV_TX_OK; 1609 goto tx_err_out; 1610 } 1611 1612 if (atomic_add_return(num_entries, &tx_scrq->used) 1613 >= adapter->req_tx_entries_per_subcrq) { 1614 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1615 netif_stop_subqueue(netdev, queue_num); 1616 } 1617 1618 tx_packets++; 1619 tx_bytes += skb->len; 1620 txq->trans_start = jiffies; 1621 ret = NETDEV_TX_OK; 1622 goto out; 1623 1624 tx_err_out: 1625 /* roll back consumer index and map array*/ 1626 if (tx_pool->consumer_index == 0) 1627 tx_pool->consumer_index = 1628 tx_pool->num_buffers - 1; 1629 else 1630 tx_pool->consumer_index--; 1631 tx_pool->free_map[tx_pool->consumer_index] = index; 1632 out: 1633 netdev->stats.tx_dropped += tx_dropped; 1634 netdev->stats.tx_bytes += tx_bytes; 1635 netdev->stats.tx_packets += tx_packets; 1636 adapter->tx_send_failed += tx_send_failed; 1637 adapter->tx_map_failed += tx_map_failed; 1638 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1639 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1640 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1641 1642 return ret; 1643 } 1644 1645 static void ibmvnic_set_multi(struct net_device *netdev) 1646 { 1647 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1648 struct netdev_hw_addr *ha; 1649 union ibmvnic_crq crq; 1650 1651 memset(&crq, 0, sizeof(crq)); 1652 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1653 crq.request_capability.cmd = REQUEST_CAPABILITY; 1654 1655 if (netdev->flags & IFF_PROMISC) { 1656 if (!adapter->promisc_supported) 1657 return; 1658 } else { 1659 if (netdev->flags & IFF_ALLMULTI) { 1660 /* Accept all multicast */ 1661 memset(&crq, 0, sizeof(crq)); 1662 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1663 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1664 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1665 ibmvnic_send_crq(adapter, &crq); 1666 } else if (netdev_mc_empty(netdev)) { 1667 /* Reject all multicast */ 1668 memset(&crq, 0, sizeof(crq)); 1669 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1670 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1671 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1672 ibmvnic_send_crq(adapter, &crq); 1673 } else { 1674 /* Accept one or more multicast(s) */ 1675 netdev_for_each_mc_addr(ha, netdev) { 1676 memset(&crq, 0, sizeof(crq)); 1677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1678 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1679 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1680 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1681 ha->addr); 1682 ibmvnic_send_crq(adapter, &crq); 1683 } 1684 } 1685 } 1686 } 1687 1688 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1689 { 1690 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1691 struct sockaddr *addr = p; 1692 union ibmvnic_crq crq; 1693 int rc; 1694 1695 if (!is_valid_ether_addr(addr->sa_data)) 1696 return -EADDRNOTAVAIL; 1697 1698 memset(&crq, 0, sizeof(crq)); 1699 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1700 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1701 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1702 1703 init_completion(&adapter->fw_done); 1704 rc = ibmvnic_send_crq(adapter, &crq); 1705 if (rc) 1706 return rc; 1707 wait_for_completion(&adapter->fw_done); 1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1709 return adapter->fw_done_rc ? -EIO : 0; 1710 } 1711 1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1713 { 1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1715 struct sockaddr *addr = p; 1716 int rc; 1717 1718 if (adapter->state == VNIC_PROBED) { 1719 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1720 adapter->mac_change_pending = true; 1721 return 0; 1722 } 1723 1724 rc = __ibmvnic_set_mac(netdev, addr); 1725 1726 return rc; 1727 } 1728 1729 /** 1730 * do_reset returns zero if we are able to keep processing reset events, or 1731 * non-zero if we hit a fatal error and must halt. 1732 */ 1733 static int do_reset(struct ibmvnic_adapter *adapter, 1734 struct ibmvnic_rwi *rwi, u32 reset_state) 1735 { 1736 u64 old_num_rx_queues, old_num_tx_queues; 1737 u64 old_num_rx_slots, old_num_tx_slots; 1738 struct net_device *netdev = adapter->netdev; 1739 int i, rc; 1740 1741 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1742 rwi->reset_reason); 1743 1744 netif_carrier_off(netdev); 1745 adapter->reset_reason = rwi->reset_reason; 1746 1747 old_num_rx_queues = adapter->req_rx_queues; 1748 old_num_tx_queues = adapter->req_tx_queues; 1749 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1750 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1751 1752 ibmvnic_cleanup(netdev); 1753 1754 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1755 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1756 rc = __ibmvnic_close(netdev); 1757 if (rc) 1758 return rc; 1759 } 1760 1761 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1762 adapter->wait_for_reset) { 1763 release_resources(adapter); 1764 release_sub_crqs(adapter, 1); 1765 release_crq_queue(adapter); 1766 } 1767 1768 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1769 /* remove the closed state so when we call open it appears 1770 * we are coming from the probed state. 1771 */ 1772 adapter->state = VNIC_PROBED; 1773 1774 if (adapter->wait_for_reset) { 1775 rc = init_crq_queue(adapter); 1776 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1777 rc = ibmvnic_reenable_crq_queue(adapter); 1778 release_sub_crqs(adapter, 1); 1779 } else { 1780 rc = ibmvnic_reset_crq(adapter); 1781 if (!rc) 1782 rc = vio_enable_interrupts(adapter->vdev); 1783 } 1784 1785 if (rc) { 1786 netdev_err(adapter->netdev, 1787 "Couldn't initialize crq. rc=%d\n", rc); 1788 return rc; 1789 } 1790 1791 rc = ibmvnic_reset_init(adapter); 1792 if (rc) 1793 return IBMVNIC_INIT_FAILED; 1794 1795 /* If the adapter was in PROBE state prior to the reset, 1796 * exit here. 1797 */ 1798 if (reset_state == VNIC_PROBED) 1799 return 0; 1800 1801 rc = ibmvnic_login(netdev); 1802 if (rc) { 1803 adapter->state = reset_state; 1804 return rc; 1805 } 1806 1807 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1808 adapter->wait_for_reset) { 1809 rc = init_resources(adapter); 1810 if (rc) 1811 return rc; 1812 } else if (adapter->req_rx_queues != old_num_rx_queues || 1813 adapter->req_tx_queues != old_num_tx_queues || 1814 adapter->req_rx_add_entries_per_subcrq != 1815 old_num_rx_slots || 1816 adapter->req_tx_entries_per_subcrq != 1817 old_num_tx_slots) { 1818 release_rx_pools(adapter); 1819 release_tx_pools(adapter); 1820 release_napi(adapter); 1821 release_vpd_data(adapter); 1822 1823 rc = init_resources(adapter); 1824 if (rc) 1825 return rc; 1826 1827 } else { 1828 rc = reset_tx_pools(adapter); 1829 if (rc) 1830 return rc; 1831 1832 rc = reset_rx_pools(adapter); 1833 if (rc) 1834 return rc; 1835 } 1836 ibmvnic_disable_irqs(adapter); 1837 } 1838 adapter->state = VNIC_CLOSED; 1839 1840 if (reset_state == VNIC_CLOSED) 1841 return 0; 1842 1843 rc = __ibmvnic_open(netdev); 1844 if (rc) { 1845 if (list_empty(&adapter->rwi_list)) 1846 adapter->state = VNIC_CLOSED; 1847 else 1848 adapter->state = reset_state; 1849 1850 return 0; 1851 } 1852 1853 /* kick napi */ 1854 for (i = 0; i < adapter->req_rx_queues; i++) 1855 napi_schedule(&adapter->napi[i]); 1856 1857 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1858 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1859 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1860 1861 netif_carrier_on(netdev); 1862 1863 return 0; 1864 } 1865 1866 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1867 struct ibmvnic_rwi *rwi, u32 reset_state) 1868 { 1869 struct net_device *netdev = adapter->netdev; 1870 int rc; 1871 1872 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1873 rwi->reset_reason); 1874 1875 netif_carrier_off(netdev); 1876 adapter->reset_reason = rwi->reset_reason; 1877 1878 ibmvnic_cleanup(netdev); 1879 release_resources(adapter); 1880 release_sub_crqs(adapter, 0); 1881 release_crq_queue(adapter); 1882 1883 /* remove the closed state so when we call open it appears 1884 * we are coming from the probed state. 1885 */ 1886 adapter->state = VNIC_PROBED; 1887 1888 rc = init_crq_queue(adapter); 1889 if (rc) { 1890 netdev_err(adapter->netdev, 1891 "Couldn't initialize crq. rc=%d\n", rc); 1892 return rc; 1893 } 1894 1895 rc = ibmvnic_init(adapter); 1896 if (rc) 1897 return rc; 1898 1899 /* If the adapter was in PROBE state prior to the reset, 1900 * exit here. 1901 */ 1902 if (reset_state == VNIC_PROBED) 1903 return 0; 1904 1905 rc = ibmvnic_login(netdev); 1906 if (rc) { 1907 adapter->state = VNIC_PROBED; 1908 return 0; 1909 } 1910 1911 rc = init_resources(adapter); 1912 if (rc) 1913 return rc; 1914 1915 ibmvnic_disable_irqs(adapter); 1916 adapter->state = VNIC_CLOSED; 1917 1918 if (reset_state == VNIC_CLOSED) 1919 return 0; 1920 1921 rc = __ibmvnic_open(netdev); 1922 if (rc) { 1923 if (list_empty(&adapter->rwi_list)) 1924 adapter->state = VNIC_CLOSED; 1925 else 1926 adapter->state = reset_state; 1927 1928 return 0; 1929 } 1930 1931 netif_carrier_on(netdev); 1932 1933 return 0; 1934 } 1935 1936 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1937 { 1938 struct ibmvnic_rwi *rwi; 1939 1940 mutex_lock(&adapter->rwi_lock); 1941 1942 if (!list_empty(&adapter->rwi_list)) { 1943 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1944 list); 1945 list_del(&rwi->list); 1946 } else { 1947 rwi = NULL; 1948 } 1949 1950 mutex_unlock(&adapter->rwi_lock); 1951 return rwi; 1952 } 1953 1954 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1955 { 1956 struct ibmvnic_rwi *rwi; 1957 1958 rwi = get_next_rwi(adapter); 1959 while (rwi) { 1960 kfree(rwi); 1961 rwi = get_next_rwi(adapter); 1962 } 1963 } 1964 1965 static void __ibmvnic_reset(struct work_struct *work) 1966 { 1967 struct ibmvnic_rwi *rwi; 1968 struct ibmvnic_adapter *adapter; 1969 struct net_device *netdev; 1970 bool we_lock_rtnl = false; 1971 u32 reset_state; 1972 int rc = 0; 1973 1974 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1975 netdev = adapter->netdev; 1976 1977 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1978 * unless wait_for_reset is set, in which case the rtnl lock 1979 * has already been taken before initializing the reset 1980 */ 1981 if (!adapter->wait_for_reset) { 1982 rtnl_lock(); 1983 we_lock_rtnl = true; 1984 } 1985 reset_state = adapter->state; 1986 1987 rwi = get_next_rwi(adapter); 1988 while (rwi) { 1989 if (adapter->force_reset_recovery) { 1990 adapter->force_reset_recovery = false; 1991 rc = do_hard_reset(adapter, rwi, reset_state); 1992 } else { 1993 rc = do_reset(adapter, rwi, reset_state); 1994 } 1995 kfree(rwi); 1996 if (rc && rc != IBMVNIC_INIT_FAILED && 1997 !adapter->force_reset_recovery) 1998 break; 1999 2000 rwi = get_next_rwi(adapter); 2001 } 2002 2003 if (adapter->wait_for_reset) { 2004 adapter->wait_for_reset = false; 2005 adapter->reset_done_rc = rc; 2006 complete(&adapter->reset_done); 2007 } 2008 2009 if (rc) { 2010 netdev_dbg(adapter->netdev, "Reset failed\n"); 2011 free_all_rwi(adapter); 2012 } 2013 2014 adapter->resetting = false; 2015 if (we_lock_rtnl) 2016 rtnl_unlock(); 2017 } 2018 2019 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2020 enum ibmvnic_reset_reason reason) 2021 { 2022 struct list_head *entry, *tmp_entry; 2023 struct ibmvnic_rwi *rwi, *tmp; 2024 struct net_device *netdev = adapter->netdev; 2025 int ret; 2026 2027 if (adapter->state == VNIC_REMOVING || 2028 adapter->state == VNIC_REMOVED || 2029 adapter->failover_pending) { 2030 ret = EBUSY; 2031 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2032 goto err; 2033 } 2034 2035 if (adapter->state == VNIC_PROBING) { 2036 netdev_warn(netdev, "Adapter reset during probe\n"); 2037 ret = adapter->init_done_rc = EAGAIN; 2038 goto err; 2039 } 2040 2041 mutex_lock(&adapter->rwi_lock); 2042 2043 list_for_each(entry, &adapter->rwi_list) { 2044 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2045 if (tmp->reset_reason == reason) { 2046 netdev_dbg(netdev, "Skipping matching reset\n"); 2047 mutex_unlock(&adapter->rwi_lock); 2048 ret = EBUSY; 2049 goto err; 2050 } 2051 } 2052 2053 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 2054 if (!rwi) { 2055 mutex_unlock(&adapter->rwi_lock); 2056 ibmvnic_close(netdev); 2057 ret = ENOMEM; 2058 goto err; 2059 } 2060 /* if we just received a transport event, 2061 * flush reset queue and process this reset 2062 */ 2063 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2064 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2065 list_del(entry); 2066 } 2067 rwi->reset_reason = reason; 2068 list_add_tail(&rwi->list, &adapter->rwi_list); 2069 mutex_unlock(&adapter->rwi_lock); 2070 adapter->resetting = true; 2071 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2072 schedule_work(&adapter->ibmvnic_reset); 2073 2074 return 0; 2075 err: 2076 if (adapter->wait_for_reset) 2077 adapter->wait_for_reset = false; 2078 return -ret; 2079 } 2080 2081 static void ibmvnic_tx_timeout(struct net_device *dev) 2082 { 2083 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2084 2085 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2086 } 2087 2088 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2089 struct ibmvnic_rx_buff *rx_buff) 2090 { 2091 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2092 2093 rx_buff->skb = NULL; 2094 2095 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2096 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2097 2098 atomic_dec(&pool->available); 2099 } 2100 2101 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2102 { 2103 struct net_device *netdev = napi->dev; 2104 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2105 int scrq_num = (int)(napi - adapter->napi); 2106 int frames_processed = 0; 2107 2108 restart_poll: 2109 while (frames_processed < budget) { 2110 struct sk_buff *skb; 2111 struct ibmvnic_rx_buff *rx_buff; 2112 union sub_crq *next; 2113 u32 length; 2114 u16 offset; 2115 u8 flags = 0; 2116 2117 if (unlikely(adapter->resetting && 2118 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2119 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2120 napi_complete_done(napi, frames_processed); 2121 return frames_processed; 2122 } 2123 2124 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2125 break; 2126 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2127 rx_buff = 2128 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2129 rx_comp.correlator); 2130 /* do error checking */ 2131 if (next->rx_comp.rc) { 2132 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2133 be16_to_cpu(next->rx_comp.rc)); 2134 /* free the entry */ 2135 next->rx_comp.first = 0; 2136 dev_kfree_skb_any(rx_buff->skb); 2137 remove_buff_from_pool(adapter, rx_buff); 2138 continue; 2139 } else if (!rx_buff->skb) { 2140 /* free the entry */ 2141 next->rx_comp.first = 0; 2142 remove_buff_from_pool(adapter, rx_buff); 2143 continue; 2144 } 2145 2146 length = be32_to_cpu(next->rx_comp.len); 2147 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2148 flags = next->rx_comp.flags; 2149 skb = rx_buff->skb; 2150 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2151 length); 2152 2153 /* VLAN Header has been stripped by the system firmware and 2154 * needs to be inserted by the driver 2155 */ 2156 if (adapter->rx_vlan_header_insertion && 2157 (flags & IBMVNIC_VLAN_STRIPPED)) 2158 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2159 ntohs(next->rx_comp.vlan_tci)); 2160 2161 /* free the entry */ 2162 next->rx_comp.first = 0; 2163 remove_buff_from_pool(adapter, rx_buff); 2164 2165 skb_put(skb, length); 2166 skb->protocol = eth_type_trans(skb, netdev); 2167 skb_record_rx_queue(skb, scrq_num); 2168 2169 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2170 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2171 skb->ip_summed = CHECKSUM_UNNECESSARY; 2172 } 2173 2174 length = skb->len; 2175 napi_gro_receive(napi, skb); /* send it up */ 2176 netdev->stats.rx_packets++; 2177 netdev->stats.rx_bytes += length; 2178 adapter->rx_stats_buffers[scrq_num].packets++; 2179 adapter->rx_stats_buffers[scrq_num].bytes += length; 2180 frames_processed++; 2181 } 2182 2183 if (adapter->state != VNIC_CLOSING) 2184 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2185 2186 if (frames_processed < budget) { 2187 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2188 napi_complete_done(napi, frames_processed); 2189 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2190 napi_reschedule(napi)) { 2191 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2192 goto restart_poll; 2193 } 2194 } 2195 return frames_processed; 2196 } 2197 2198 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2199 { 2200 int rc, ret; 2201 2202 adapter->fallback.mtu = adapter->req_mtu; 2203 adapter->fallback.rx_queues = adapter->req_rx_queues; 2204 adapter->fallback.tx_queues = adapter->req_tx_queues; 2205 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2206 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2207 2208 init_completion(&adapter->reset_done); 2209 adapter->wait_for_reset = true; 2210 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2211 if (rc) 2212 return rc; 2213 wait_for_completion(&adapter->reset_done); 2214 2215 ret = 0; 2216 if (adapter->reset_done_rc) { 2217 ret = -EIO; 2218 adapter->desired.mtu = adapter->fallback.mtu; 2219 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2220 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2221 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2222 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2223 2224 init_completion(&adapter->reset_done); 2225 adapter->wait_for_reset = true; 2226 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2227 if (rc) 2228 return ret; 2229 wait_for_completion(&adapter->reset_done); 2230 } 2231 adapter->wait_for_reset = false; 2232 2233 return ret; 2234 } 2235 2236 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2237 { 2238 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2239 2240 adapter->desired.mtu = new_mtu + ETH_HLEN; 2241 2242 return wait_for_reset(adapter); 2243 } 2244 2245 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2246 struct net_device *dev, 2247 netdev_features_t features) 2248 { 2249 /* Some backing hardware adapters can not 2250 * handle packets with a MSS less than 224 2251 * or with only one segment. 2252 */ 2253 if (skb_is_gso(skb)) { 2254 if (skb_shinfo(skb)->gso_size < 224 || 2255 skb_shinfo(skb)->gso_segs == 1) 2256 features &= ~NETIF_F_GSO_MASK; 2257 } 2258 2259 return features; 2260 } 2261 2262 static const struct net_device_ops ibmvnic_netdev_ops = { 2263 .ndo_open = ibmvnic_open, 2264 .ndo_stop = ibmvnic_close, 2265 .ndo_start_xmit = ibmvnic_xmit, 2266 .ndo_set_rx_mode = ibmvnic_set_multi, 2267 .ndo_set_mac_address = ibmvnic_set_mac, 2268 .ndo_validate_addr = eth_validate_addr, 2269 .ndo_tx_timeout = ibmvnic_tx_timeout, 2270 .ndo_change_mtu = ibmvnic_change_mtu, 2271 .ndo_features_check = ibmvnic_features_check, 2272 }; 2273 2274 /* ethtool functions */ 2275 2276 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2277 struct ethtool_link_ksettings *cmd) 2278 { 2279 u32 supported, advertising; 2280 2281 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2282 SUPPORTED_FIBRE); 2283 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2284 ADVERTISED_FIBRE); 2285 cmd->base.speed = SPEED_1000; 2286 cmd->base.duplex = DUPLEX_FULL; 2287 cmd->base.port = PORT_FIBRE; 2288 cmd->base.phy_address = 0; 2289 cmd->base.autoneg = AUTONEG_ENABLE; 2290 2291 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2292 supported); 2293 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2294 advertising); 2295 2296 return 0; 2297 } 2298 2299 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2300 struct ethtool_drvinfo *info) 2301 { 2302 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2303 2304 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2305 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2306 strlcpy(info->fw_version, adapter->fw_version, 2307 sizeof(info->fw_version)); 2308 } 2309 2310 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2311 { 2312 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2313 2314 return adapter->msg_enable; 2315 } 2316 2317 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2318 { 2319 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2320 2321 adapter->msg_enable = data; 2322 } 2323 2324 static u32 ibmvnic_get_link(struct net_device *netdev) 2325 { 2326 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2327 2328 /* Don't need to send a query because we request a logical link up at 2329 * init and then we wait for link state indications 2330 */ 2331 return adapter->logical_link_state; 2332 } 2333 2334 static void ibmvnic_get_ringparam(struct net_device *netdev, 2335 struct ethtool_ringparam *ring) 2336 { 2337 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2338 2339 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2340 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2341 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2342 } else { 2343 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2344 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2345 } 2346 ring->rx_mini_max_pending = 0; 2347 ring->rx_jumbo_max_pending = 0; 2348 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2349 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2350 ring->rx_mini_pending = 0; 2351 ring->rx_jumbo_pending = 0; 2352 } 2353 2354 static int ibmvnic_set_ringparam(struct net_device *netdev, 2355 struct ethtool_ringparam *ring) 2356 { 2357 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2358 int ret; 2359 2360 ret = 0; 2361 adapter->desired.rx_entries = ring->rx_pending; 2362 adapter->desired.tx_entries = ring->tx_pending; 2363 2364 ret = wait_for_reset(adapter); 2365 2366 if (!ret && 2367 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2368 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2369 netdev_info(netdev, 2370 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2371 ring->rx_pending, ring->tx_pending, 2372 adapter->req_rx_add_entries_per_subcrq, 2373 adapter->req_tx_entries_per_subcrq); 2374 return ret; 2375 } 2376 2377 static void ibmvnic_get_channels(struct net_device *netdev, 2378 struct ethtool_channels *channels) 2379 { 2380 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2381 2382 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2383 channels->max_rx = adapter->max_rx_queues; 2384 channels->max_tx = adapter->max_tx_queues; 2385 } else { 2386 channels->max_rx = IBMVNIC_MAX_QUEUES; 2387 channels->max_tx = IBMVNIC_MAX_QUEUES; 2388 } 2389 2390 channels->max_other = 0; 2391 channels->max_combined = 0; 2392 channels->rx_count = adapter->req_rx_queues; 2393 channels->tx_count = adapter->req_tx_queues; 2394 channels->other_count = 0; 2395 channels->combined_count = 0; 2396 } 2397 2398 static int ibmvnic_set_channels(struct net_device *netdev, 2399 struct ethtool_channels *channels) 2400 { 2401 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2402 int ret; 2403 2404 ret = 0; 2405 adapter->desired.rx_queues = channels->rx_count; 2406 adapter->desired.tx_queues = channels->tx_count; 2407 2408 ret = wait_for_reset(adapter); 2409 2410 if (!ret && 2411 (adapter->req_rx_queues != channels->rx_count || 2412 adapter->req_tx_queues != channels->tx_count)) 2413 netdev_info(netdev, 2414 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2415 channels->rx_count, channels->tx_count, 2416 adapter->req_rx_queues, adapter->req_tx_queues); 2417 return ret; 2418 2419 } 2420 2421 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2422 { 2423 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2424 int i; 2425 2426 switch (stringset) { 2427 case ETH_SS_STATS: 2428 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2429 i++, data += ETH_GSTRING_LEN) 2430 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2431 2432 for (i = 0; i < adapter->req_tx_queues; i++) { 2433 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2434 data += ETH_GSTRING_LEN; 2435 2436 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2437 data += ETH_GSTRING_LEN; 2438 2439 snprintf(data, ETH_GSTRING_LEN, 2440 "tx%d_dropped_packets", i); 2441 data += ETH_GSTRING_LEN; 2442 } 2443 2444 for (i = 0; i < adapter->req_rx_queues; i++) { 2445 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2446 data += ETH_GSTRING_LEN; 2447 2448 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2449 data += ETH_GSTRING_LEN; 2450 2451 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2452 data += ETH_GSTRING_LEN; 2453 } 2454 break; 2455 2456 case ETH_SS_PRIV_FLAGS: 2457 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2458 strcpy(data + i * ETH_GSTRING_LEN, 2459 ibmvnic_priv_flags[i]); 2460 break; 2461 default: 2462 return; 2463 } 2464 } 2465 2466 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2467 { 2468 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2469 2470 switch (sset) { 2471 case ETH_SS_STATS: 2472 return ARRAY_SIZE(ibmvnic_stats) + 2473 adapter->req_tx_queues * NUM_TX_STATS + 2474 adapter->req_rx_queues * NUM_RX_STATS; 2475 case ETH_SS_PRIV_FLAGS: 2476 return ARRAY_SIZE(ibmvnic_priv_flags); 2477 default: 2478 return -EOPNOTSUPP; 2479 } 2480 } 2481 2482 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2483 struct ethtool_stats *stats, u64 *data) 2484 { 2485 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2486 union ibmvnic_crq crq; 2487 int i, j; 2488 int rc; 2489 2490 memset(&crq, 0, sizeof(crq)); 2491 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2492 crq.request_statistics.cmd = REQUEST_STATISTICS; 2493 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2494 crq.request_statistics.len = 2495 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2496 2497 /* Wait for data to be written */ 2498 init_completion(&adapter->stats_done); 2499 rc = ibmvnic_send_crq(adapter, &crq); 2500 if (rc) 2501 return; 2502 wait_for_completion(&adapter->stats_done); 2503 2504 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2505 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2506 ibmvnic_stats[i].offset)); 2507 2508 for (j = 0; j < adapter->req_tx_queues; j++) { 2509 data[i] = adapter->tx_stats_buffers[j].packets; 2510 i++; 2511 data[i] = adapter->tx_stats_buffers[j].bytes; 2512 i++; 2513 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2514 i++; 2515 } 2516 2517 for (j = 0; j < adapter->req_rx_queues; j++) { 2518 data[i] = adapter->rx_stats_buffers[j].packets; 2519 i++; 2520 data[i] = adapter->rx_stats_buffers[j].bytes; 2521 i++; 2522 data[i] = adapter->rx_stats_buffers[j].interrupts; 2523 i++; 2524 } 2525 } 2526 2527 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2528 { 2529 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2530 2531 return adapter->priv_flags; 2532 } 2533 2534 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2535 { 2536 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2537 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2538 2539 if (which_maxes) 2540 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2541 else 2542 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2543 2544 return 0; 2545 } 2546 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2547 .get_drvinfo = ibmvnic_get_drvinfo, 2548 .get_msglevel = ibmvnic_get_msglevel, 2549 .set_msglevel = ibmvnic_set_msglevel, 2550 .get_link = ibmvnic_get_link, 2551 .get_ringparam = ibmvnic_get_ringparam, 2552 .set_ringparam = ibmvnic_set_ringparam, 2553 .get_channels = ibmvnic_get_channels, 2554 .set_channels = ibmvnic_set_channels, 2555 .get_strings = ibmvnic_get_strings, 2556 .get_sset_count = ibmvnic_get_sset_count, 2557 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2558 .get_link_ksettings = ibmvnic_get_link_ksettings, 2559 .get_priv_flags = ibmvnic_get_priv_flags, 2560 .set_priv_flags = ibmvnic_set_priv_flags, 2561 }; 2562 2563 /* Routines for managing CRQs/sCRQs */ 2564 2565 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2566 struct ibmvnic_sub_crq_queue *scrq) 2567 { 2568 int rc; 2569 2570 if (scrq->irq) { 2571 free_irq(scrq->irq, scrq); 2572 irq_dispose_mapping(scrq->irq); 2573 scrq->irq = 0; 2574 } 2575 2576 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2577 atomic_set(&scrq->used, 0); 2578 scrq->cur = 0; 2579 2580 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2581 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2582 return rc; 2583 } 2584 2585 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2586 { 2587 int i, rc; 2588 2589 for (i = 0; i < adapter->req_tx_queues; i++) { 2590 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2591 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2592 if (rc) 2593 return rc; 2594 } 2595 2596 for (i = 0; i < adapter->req_rx_queues; i++) { 2597 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2598 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2599 if (rc) 2600 return rc; 2601 } 2602 2603 return rc; 2604 } 2605 2606 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2607 struct ibmvnic_sub_crq_queue *scrq, 2608 bool do_h_free) 2609 { 2610 struct device *dev = &adapter->vdev->dev; 2611 long rc; 2612 2613 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2614 2615 if (do_h_free) { 2616 /* Close the sub-crqs */ 2617 do { 2618 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2619 adapter->vdev->unit_address, 2620 scrq->crq_num); 2621 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2622 2623 if (rc) { 2624 netdev_err(adapter->netdev, 2625 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2626 scrq->crq_num, rc); 2627 } 2628 } 2629 2630 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2631 DMA_BIDIRECTIONAL); 2632 free_pages((unsigned long)scrq->msgs, 2); 2633 kfree(scrq); 2634 } 2635 2636 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2637 *adapter) 2638 { 2639 struct device *dev = &adapter->vdev->dev; 2640 struct ibmvnic_sub_crq_queue *scrq; 2641 int rc; 2642 2643 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2644 if (!scrq) 2645 return NULL; 2646 2647 scrq->msgs = 2648 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2649 if (!scrq->msgs) { 2650 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2651 goto zero_page_failed; 2652 } 2653 2654 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2655 DMA_BIDIRECTIONAL); 2656 if (dma_mapping_error(dev, scrq->msg_token)) { 2657 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2658 goto map_failed; 2659 } 2660 2661 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2662 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2663 2664 if (rc == H_RESOURCE) 2665 rc = ibmvnic_reset_crq(adapter); 2666 2667 if (rc == H_CLOSED) { 2668 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2669 } else if (rc) { 2670 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2671 goto reg_failed; 2672 } 2673 2674 scrq->adapter = adapter; 2675 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2676 spin_lock_init(&scrq->lock); 2677 2678 netdev_dbg(adapter->netdev, 2679 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2680 scrq->crq_num, scrq->hw_irq, scrq->irq); 2681 2682 return scrq; 2683 2684 reg_failed: 2685 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2686 DMA_BIDIRECTIONAL); 2687 map_failed: 2688 free_pages((unsigned long)scrq->msgs, 2); 2689 zero_page_failed: 2690 kfree(scrq); 2691 2692 return NULL; 2693 } 2694 2695 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2696 { 2697 int i; 2698 2699 if (adapter->tx_scrq) { 2700 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2701 if (!adapter->tx_scrq[i]) 2702 continue; 2703 2704 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2705 i); 2706 if (adapter->tx_scrq[i]->irq) { 2707 free_irq(adapter->tx_scrq[i]->irq, 2708 adapter->tx_scrq[i]); 2709 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2710 adapter->tx_scrq[i]->irq = 0; 2711 } 2712 2713 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2714 do_h_free); 2715 } 2716 2717 kfree(adapter->tx_scrq); 2718 adapter->tx_scrq = NULL; 2719 adapter->num_active_tx_scrqs = 0; 2720 } 2721 2722 if (adapter->rx_scrq) { 2723 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2724 if (!adapter->rx_scrq[i]) 2725 continue; 2726 2727 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2728 i); 2729 if (adapter->rx_scrq[i]->irq) { 2730 free_irq(adapter->rx_scrq[i]->irq, 2731 adapter->rx_scrq[i]); 2732 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2733 adapter->rx_scrq[i]->irq = 0; 2734 } 2735 2736 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2737 do_h_free); 2738 } 2739 2740 kfree(adapter->rx_scrq); 2741 adapter->rx_scrq = NULL; 2742 adapter->num_active_rx_scrqs = 0; 2743 } 2744 } 2745 2746 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2747 struct ibmvnic_sub_crq_queue *scrq) 2748 { 2749 struct device *dev = &adapter->vdev->dev; 2750 unsigned long rc; 2751 2752 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2753 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2754 if (rc) 2755 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2756 scrq->hw_irq, rc); 2757 return rc; 2758 } 2759 2760 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2761 struct ibmvnic_sub_crq_queue *scrq) 2762 { 2763 struct device *dev = &adapter->vdev->dev; 2764 unsigned long rc; 2765 2766 if (scrq->hw_irq > 0x100000000ULL) { 2767 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2768 return 1; 2769 } 2770 2771 if (adapter->resetting && 2772 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2773 u64 val = (0xff000000) | scrq->hw_irq; 2774 2775 rc = plpar_hcall_norets(H_EOI, val); 2776 if (rc) 2777 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2778 val, rc); 2779 } 2780 2781 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2782 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2783 if (rc) 2784 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2785 scrq->hw_irq, rc); 2786 return rc; 2787 } 2788 2789 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2790 struct ibmvnic_sub_crq_queue *scrq) 2791 { 2792 struct device *dev = &adapter->vdev->dev; 2793 struct ibmvnic_tx_pool *tx_pool; 2794 struct ibmvnic_tx_buff *txbuff; 2795 union sub_crq *next; 2796 int index; 2797 int i, j; 2798 u8 *first; 2799 2800 restart_loop: 2801 while (pending_scrq(adapter, scrq)) { 2802 unsigned int pool = scrq->pool_index; 2803 int num_entries = 0; 2804 2805 next = ibmvnic_next_scrq(adapter, scrq); 2806 for (i = 0; i < next->tx_comp.num_comps; i++) { 2807 if (next->tx_comp.rcs[i]) { 2808 dev_err(dev, "tx error %x\n", 2809 next->tx_comp.rcs[i]); 2810 continue; 2811 } 2812 index = be32_to_cpu(next->tx_comp.correlators[i]); 2813 if (index & IBMVNIC_TSO_POOL_MASK) { 2814 tx_pool = &adapter->tso_pool[pool]; 2815 index &= ~IBMVNIC_TSO_POOL_MASK; 2816 } else { 2817 tx_pool = &adapter->tx_pool[pool]; 2818 } 2819 2820 txbuff = &tx_pool->tx_buff[index]; 2821 2822 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2823 if (!txbuff->data_dma[j]) 2824 continue; 2825 2826 txbuff->data_dma[j] = 0; 2827 } 2828 /* if sub_crq was sent indirectly */ 2829 first = &txbuff->indir_arr[0].generic.first; 2830 if (*first == IBMVNIC_CRQ_CMD) { 2831 dma_unmap_single(dev, txbuff->indir_dma, 2832 sizeof(txbuff->indir_arr), 2833 DMA_TO_DEVICE); 2834 *first = 0; 2835 } 2836 2837 if (txbuff->last_frag) { 2838 dev_kfree_skb_any(txbuff->skb); 2839 txbuff->skb = NULL; 2840 } 2841 2842 num_entries += txbuff->num_entries; 2843 2844 tx_pool->free_map[tx_pool->producer_index] = index; 2845 tx_pool->producer_index = 2846 (tx_pool->producer_index + 1) % 2847 tx_pool->num_buffers; 2848 } 2849 /* remove tx_comp scrq*/ 2850 next->tx_comp.first = 0; 2851 2852 if (atomic_sub_return(num_entries, &scrq->used) <= 2853 (adapter->req_tx_entries_per_subcrq / 2) && 2854 __netif_subqueue_stopped(adapter->netdev, 2855 scrq->pool_index)) { 2856 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2857 netdev_dbg(adapter->netdev, "Started queue %d\n", 2858 scrq->pool_index); 2859 } 2860 } 2861 2862 enable_scrq_irq(adapter, scrq); 2863 2864 if (pending_scrq(adapter, scrq)) { 2865 disable_scrq_irq(adapter, scrq); 2866 goto restart_loop; 2867 } 2868 2869 return 0; 2870 } 2871 2872 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2873 { 2874 struct ibmvnic_sub_crq_queue *scrq = instance; 2875 struct ibmvnic_adapter *adapter = scrq->adapter; 2876 2877 disable_scrq_irq(adapter, scrq); 2878 ibmvnic_complete_tx(adapter, scrq); 2879 2880 return IRQ_HANDLED; 2881 } 2882 2883 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2884 { 2885 struct ibmvnic_sub_crq_queue *scrq = instance; 2886 struct ibmvnic_adapter *adapter = scrq->adapter; 2887 2888 /* When booting a kdump kernel we can hit pending interrupts 2889 * prior to completing driver initialization. 2890 */ 2891 if (unlikely(adapter->state != VNIC_OPEN)) 2892 return IRQ_NONE; 2893 2894 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2895 2896 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2897 disable_scrq_irq(adapter, scrq); 2898 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2899 } 2900 2901 return IRQ_HANDLED; 2902 } 2903 2904 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2905 { 2906 struct device *dev = &adapter->vdev->dev; 2907 struct ibmvnic_sub_crq_queue *scrq; 2908 int i = 0, j = 0; 2909 int rc = 0; 2910 2911 for (i = 0; i < adapter->req_tx_queues; i++) { 2912 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2913 i); 2914 scrq = adapter->tx_scrq[i]; 2915 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2916 2917 if (!scrq->irq) { 2918 rc = -EINVAL; 2919 dev_err(dev, "Error mapping irq\n"); 2920 goto req_tx_irq_failed; 2921 } 2922 2923 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2924 0, "ibmvnic_tx", scrq); 2925 2926 if (rc) { 2927 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2928 scrq->irq, rc); 2929 irq_dispose_mapping(scrq->irq); 2930 goto req_tx_irq_failed; 2931 } 2932 } 2933 2934 for (i = 0; i < adapter->req_rx_queues; i++) { 2935 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2936 i); 2937 scrq = adapter->rx_scrq[i]; 2938 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2939 if (!scrq->irq) { 2940 rc = -EINVAL; 2941 dev_err(dev, "Error mapping irq\n"); 2942 goto req_rx_irq_failed; 2943 } 2944 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2945 0, "ibmvnic_rx", scrq); 2946 if (rc) { 2947 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2948 scrq->irq, rc); 2949 irq_dispose_mapping(scrq->irq); 2950 goto req_rx_irq_failed; 2951 } 2952 } 2953 return rc; 2954 2955 req_rx_irq_failed: 2956 for (j = 0; j < i; j++) { 2957 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2958 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2959 } 2960 i = adapter->req_tx_queues; 2961 req_tx_irq_failed: 2962 for (j = 0; j < i; j++) { 2963 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2964 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2965 } 2966 release_sub_crqs(adapter, 1); 2967 return rc; 2968 } 2969 2970 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2971 { 2972 struct device *dev = &adapter->vdev->dev; 2973 struct ibmvnic_sub_crq_queue **allqueues; 2974 int registered_queues = 0; 2975 int total_queues; 2976 int more = 0; 2977 int i; 2978 2979 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2980 2981 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2982 if (!allqueues) 2983 return -1; 2984 2985 for (i = 0; i < total_queues; i++) { 2986 allqueues[i] = init_sub_crq_queue(adapter); 2987 if (!allqueues[i]) { 2988 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2989 break; 2990 } 2991 registered_queues++; 2992 } 2993 2994 /* Make sure we were able to register the minimum number of queues */ 2995 if (registered_queues < 2996 adapter->min_tx_queues + adapter->min_rx_queues) { 2997 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2998 goto tx_failed; 2999 } 3000 3001 /* Distribute the failed allocated queues*/ 3002 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3003 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3004 switch (i % 3) { 3005 case 0: 3006 if (adapter->req_rx_queues > adapter->min_rx_queues) 3007 adapter->req_rx_queues--; 3008 else 3009 more++; 3010 break; 3011 case 1: 3012 if (adapter->req_tx_queues > adapter->min_tx_queues) 3013 adapter->req_tx_queues--; 3014 else 3015 more++; 3016 break; 3017 } 3018 } 3019 3020 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3021 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3022 if (!adapter->tx_scrq) 3023 goto tx_failed; 3024 3025 for (i = 0; i < adapter->req_tx_queues; i++) { 3026 adapter->tx_scrq[i] = allqueues[i]; 3027 adapter->tx_scrq[i]->pool_index = i; 3028 adapter->num_active_tx_scrqs++; 3029 } 3030 3031 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3032 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3033 if (!adapter->rx_scrq) 3034 goto rx_failed; 3035 3036 for (i = 0; i < adapter->req_rx_queues; i++) { 3037 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3038 adapter->rx_scrq[i]->scrq_num = i; 3039 adapter->num_active_rx_scrqs++; 3040 } 3041 3042 kfree(allqueues); 3043 return 0; 3044 3045 rx_failed: 3046 kfree(adapter->tx_scrq); 3047 adapter->tx_scrq = NULL; 3048 tx_failed: 3049 for (i = 0; i < registered_queues; i++) 3050 release_sub_crq_queue(adapter, allqueues[i], 1); 3051 kfree(allqueues); 3052 return -1; 3053 } 3054 3055 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3056 { 3057 struct device *dev = &adapter->vdev->dev; 3058 union ibmvnic_crq crq; 3059 int max_entries; 3060 3061 if (!retry) { 3062 /* Sub-CRQ entries are 32 byte long */ 3063 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3064 3065 if (adapter->min_tx_entries_per_subcrq > entries_page || 3066 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3067 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3068 return; 3069 } 3070 3071 if (adapter->desired.mtu) 3072 adapter->req_mtu = adapter->desired.mtu; 3073 else 3074 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3075 3076 if (!adapter->desired.tx_entries) 3077 adapter->desired.tx_entries = 3078 adapter->max_tx_entries_per_subcrq; 3079 if (!adapter->desired.rx_entries) 3080 adapter->desired.rx_entries = 3081 adapter->max_rx_add_entries_per_subcrq; 3082 3083 max_entries = IBMVNIC_MAX_LTB_SIZE / 3084 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3085 3086 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3087 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3088 adapter->desired.tx_entries = max_entries; 3089 } 3090 3091 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3092 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3093 adapter->desired.rx_entries = max_entries; 3094 } 3095 3096 if (adapter->desired.tx_entries) 3097 adapter->req_tx_entries_per_subcrq = 3098 adapter->desired.tx_entries; 3099 else 3100 adapter->req_tx_entries_per_subcrq = 3101 adapter->max_tx_entries_per_subcrq; 3102 3103 if (adapter->desired.rx_entries) 3104 adapter->req_rx_add_entries_per_subcrq = 3105 adapter->desired.rx_entries; 3106 else 3107 adapter->req_rx_add_entries_per_subcrq = 3108 adapter->max_rx_add_entries_per_subcrq; 3109 3110 if (adapter->desired.tx_queues) 3111 adapter->req_tx_queues = 3112 adapter->desired.tx_queues; 3113 else 3114 adapter->req_tx_queues = 3115 adapter->opt_tx_comp_sub_queues; 3116 3117 if (adapter->desired.rx_queues) 3118 adapter->req_rx_queues = 3119 adapter->desired.rx_queues; 3120 else 3121 adapter->req_rx_queues = 3122 adapter->opt_rx_comp_queues; 3123 3124 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3125 } 3126 3127 memset(&crq, 0, sizeof(crq)); 3128 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3129 crq.request_capability.cmd = REQUEST_CAPABILITY; 3130 3131 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3132 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3133 atomic_inc(&adapter->running_cap_crqs); 3134 ibmvnic_send_crq(adapter, &crq); 3135 3136 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3137 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3138 atomic_inc(&adapter->running_cap_crqs); 3139 ibmvnic_send_crq(adapter, &crq); 3140 3141 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3142 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3143 atomic_inc(&adapter->running_cap_crqs); 3144 ibmvnic_send_crq(adapter, &crq); 3145 3146 crq.request_capability.capability = 3147 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3148 crq.request_capability.number = 3149 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3150 atomic_inc(&adapter->running_cap_crqs); 3151 ibmvnic_send_crq(adapter, &crq); 3152 3153 crq.request_capability.capability = 3154 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3155 crq.request_capability.number = 3156 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3157 atomic_inc(&adapter->running_cap_crqs); 3158 ibmvnic_send_crq(adapter, &crq); 3159 3160 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3161 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3162 atomic_inc(&adapter->running_cap_crqs); 3163 ibmvnic_send_crq(adapter, &crq); 3164 3165 if (adapter->netdev->flags & IFF_PROMISC) { 3166 if (adapter->promisc_supported) { 3167 crq.request_capability.capability = 3168 cpu_to_be16(PROMISC_REQUESTED); 3169 crq.request_capability.number = cpu_to_be64(1); 3170 atomic_inc(&adapter->running_cap_crqs); 3171 ibmvnic_send_crq(adapter, &crq); 3172 } 3173 } else { 3174 crq.request_capability.capability = 3175 cpu_to_be16(PROMISC_REQUESTED); 3176 crq.request_capability.number = cpu_to_be64(0); 3177 atomic_inc(&adapter->running_cap_crqs); 3178 ibmvnic_send_crq(adapter, &crq); 3179 } 3180 } 3181 3182 static int pending_scrq(struct ibmvnic_adapter *adapter, 3183 struct ibmvnic_sub_crq_queue *scrq) 3184 { 3185 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3186 3187 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3188 return 1; 3189 else 3190 return 0; 3191 } 3192 3193 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3194 struct ibmvnic_sub_crq_queue *scrq) 3195 { 3196 union sub_crq *entry; 3197 unsigned long flags; 3198 3199 spin_lock_irqsave(&scrq->lock, flags); 3200 entry = &scrq->msgs[scrq->cur]; 3201 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3202 if (++scrq->cur == scrq->size) 3203 scrq->cur = 0; 3204 } else { 3205 entry = NULL; 3206 } 3207 spin_unlock_irqrestore(&scrq->lock, flags); 3208 3209 return entry; 3210 } 3211 3212 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3213 { 3214 struct ibmvnic_crq_queue *queue = &adapter->crq; 3215 union ibmvnic_crq *crq; 3216 3217 crq = &queue->msgs[queue->cur]; 3218 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3219 if (++queue->cur == queue->size) 3220 queue->cur = 0; 3221 } else { 3222 crq = NULL; 3223 } 3224 3225 return crq; 3226 } 3227 3228 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3229 { 3230 switch (rc) { 3231 case H_PARAMETER: 3232 dev_warn_ratelimited(dev, 3233 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3234 func, rc); 3235 break; 3236 case H_CLOSED: 3237 dev_warn_ratelimited(dev, 3238 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3239 func, rc); 3240 break; 3241 default: 3242 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3243 break; 3244 } 3245 } 3246 3247 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3248 union sub_crq *sub_crq) 3249 { 3250 unsigned int ua = adapter->vdev->unit_address; 3251 struct device *dev = &adapter->vdev->dev; 3252 u64 *u64_crq = (u64 *)sub_crq; 3253 int rc; 3254 3255 netdev_dbg(adapter->netdev, 3256 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3257 (unsigned long int)cpu_to_be64(remote_handle), 3258 (unsigned long int)cpu_to_be64(u64_crq[0]), 3259 (unsigned long int)cpu_to_be64(u64_crq[1]), 3260 (unsigned long int)cpu_to_be64(u64_crq[2]), 3261 (unsigned long int)cpu_to_be64(u64_crq[3])); 3262 3263 /* Make sure the hypervisor sees the complete request */ 3264 mb(); 3265 3266 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3267 cpu_to_be64(remote_handle), 3268 cpu_to_be64(u64_crq[0]), 3269 cpu_to_be64(u64_crq[1]), 3270 cpu_to_be64(u64_crq[2]), 3271 cpu_to_be64(u64_crq[3])); 3272 3273 if (rc) 3274 print_subcrq_error(dev, rc, __func__); 3275 3276 return rc; 3277 } 3278 3279 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3280 u64 remote_handle, u64 ioba, u64 num_entries) 3281 { 3282 unsigned int ua = adapter->vdev->unit_address; 3283 struct device *dev = &adapter->vdev->dev; 3284 int rc; 3285 3286 /* Make sure the hypervisor sees the complete request */ 3287 mb(); 3288 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3289 cpu_to_be64(remote_handle), 3290 ioba, num_entries); 3291 3292 if (rc) 3293 print_subcrq_error(dev, rc, __func__); 3294 3295 return rc; 3296 } 3297 3298 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3299 union ibmvnic_crq *crq) 3300 { 3301 unsigned int ua = adapter->vdev->unit_address; 3302 struct device *dev = &adapter->vdev->dev; 3303 u64 *u64_crq = (u64 *)crq; 3304 int rc; 3305 3306 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3307 (unsigned long int)cpu_to_be64(u64_crq[0]), 3308 (unsigned long int)cpu_to_be64(u64_crq[1])); 3309 3310 if (!adapter->crq.active && 3311 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3312 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3313 return -EINVAL; 3314 } 3315 3316 /* Make sure the hypervisor sees the complete request */ 3317 mb(); 3318 3319 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3320 cpu_to_be64(u64_crq[0]), 3321 cpu_to_be64(u64_crq[1])); 3322 3323 if (rc) { 3324 if (rc == H_CLOSED) { 3325 dev_warn(dev, "CRQ Queue closed\n"); 3326 if (adapter->resetting) 3327 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3328 } 3329 3330 dev_warn(dev, "Send error (rc=%d)\n", rc); 3331 } 3332 3333 return rc; 3334 } 3335 3336 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3337 { 3338 union ibmvnic_crq crq; 3339 3340 memset(&crq, 0, sizeof(crq)); 3341 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3342 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3343 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3344 3345 return ibmvnic_send_crq(adapter, &crq); 3346 } 3347 3348 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3349 { 3350 union ibmvnic_crq crq; 3351 3352 memset(&crq, 0, sizeof(crq)); 3353 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3354 crq.version_exchange.cmd = VERSION_EXCHANGE; 3355 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3356 3357 return ibmvnic_send_crq(adapter, &crq); 3358 } 3359 3360 struct vnic_login_client_data { 3361 u8 type; 3362 __be16 len; 3363 char name[]; 3364 } __packed; 3365 3366 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3367 { 3368 int len; 3369 3370 /* Calculate the amount of buffer space needed for the 3371 * vnic client data in the login buffer. There are four entries, 3372 * OS name, LPAR name, device name, and a null last entry. 3373 */ 3374 len = 4 * sizeof(struct vnic_login_client_data); 3375 len += 6; /* "Linux" plus NULL */ 3376 len += strlen(utsname()->nodename) + 1; 3377 len += strlen(adapter->netdev->name) + 1; 3378 3379 return len; 3380 } 3381 3382 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3383 struct vnic_login_client_data *vlcd) 3384 { 3385 const char *os_name = "Linux"; 3386 int len; 3387 3388 /* Type 1 - LPAR OS */ 3389 vlcd->type = 1; 3390 len = strlen(os_name) + 1; 3391 vlcd->len = cpu_to_be16(len); 3392 strncpy(vlcd->name, os_name, len); 3393 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3394 3395 /* Type 2 - LPAR name */ 3396 vlcd->type = 2; 3397 len = strlen(utsname()->nodename) + 1; 3398 vlcd->len = cpu_to_be16(len); 3399 strncpy(vlcd->name, utsname()->nodename, len); 3400 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3401 3402 /* Type 3 - device name */ 3403 vlcd->type = 3; 3404 len = strlen(adapter->netdev->name) + 1; 3405 vlcd->len = cpu_to_be16(len); 3406 strncpy(vlcd->name, adapter->netdev->name, len); 3407 } 3408 3409 static int send_login(struct ibmvnic_adapter *adapter) 3410 { 3411 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3412 struct ibmvnic_login_buffer *login_buffer; 3413 struct device *dev = &adapter->vdev->dev; 3414 dma_addr_t rsp_buffer_token; 3415 dma_addr_t buffer_token; 3416 size_t rsp_buffer_size; 3417 union ibmvnic_crq crq; 3418 size_t buffer_size; 3419 __be64 *tx_list_p; 3420 __be64 *rx_list_p; 3421 int client_data_len; 3422 struct vnic_login_client_data *vlcd; 3423 int i; 3424 3425 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3426 netdev_err(adapter->netdev, 3427 "RX or TX queues are not allocated, device login failed\n"); 3428 return -1; 3429 } 3430 3431 release_login_rsp_buffer(adapter); 3432 client_data_len = vnic_client_data_len(adapter); 3433 3434 buffer_size = 3435 sizeof(struct ibmvnic_login_buffer) + 3436 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3437 client_data_len; 3438 3439 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3440 if (!login_buffer) 3441 goto buf_alloc_failed; 3442 3443 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3444 DMA_TO_DEVICE); 3445 if (dma_mapping_error(dev, buffer_token)) { 3446 dev_err(dev, "Couldn't map login buffer\n"); 3447 goto buf_map_failed; 3448 } 3449 3450 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3451 sizeof(u64) * adapter->req_tx_queues + 3452 sizeof(u64) * adapter->req_rx_queues + 3453 sizeof(u64) * adapter->req_rx_queues + 3454 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3455 3456 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3457 if (!login_rsp_buffer) 3458 goto buf_rsp_alloc_failed; 3459 3460 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3461 rsp_buffer_size, DMA_FROM_DEVICE); 3462 if (dma_mapping_error(dev, rsp_buffer_token)) { 3463 dev_err(dev, "Couldn't map login rsp buffer\n"); 3464 goto buf_rsp_map_failed; 3465 } 3466 3467 adapter->login_buf = login_buffer; 3468 adapter->login_buf_token = buffer_token; 3469 adapter->login_buf_sz = buffer_size; 3470 adapter->login_rsp_buf = login_rsp_buffer; 3471 adapter->login_rsp_buf_token = rsp_buffer_token; 3472 adapter->login_rsp_buf_sz = rsp_buffer_size; 3473 3474 login_buffer->len = cpu_to_be32(buffer_size); 3475 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3476 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3477 login_buffer->off_txcomp_subcrqs = 3478 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3479 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3480 login_buffer->off_rxcomp_subcrqs = 3481 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3482 sizeof(u64) * adapter->req_tx_queues); 3483 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3484 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3485 3486 tx_list_p = (__be64 *)((char *)login_buffer + 3487 sizeof(struct ibmvnic_login_buffer)); 3488 rx_list_p = (__be64 *)((char *)login_buffer + 3489 sizeof(struct ibmvnic_login_buffer) + 3490 sizeof(u64) * adapter->req_tx_queues); 3491 3492 for (i = 0; i < adapter->req_tx_queues; i++) { 3493 if (adapter->tx_scrq[i]) { 3494 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3495 crq_num); 3496 } 3497 } 3498 3499 for (i = 0; i < adapter->req_rx_queues; i++) { 3500 if (adapter->rx_scrq[i]) { 3501 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3502 crq_num); 3503 } 3504 } 3505 3506 /* Insert vNIC login client data */ 3507 vlcd = (struct vnic_login_client_data *) 3508 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3509 login_buffer->client_data_offset = 3510 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3511 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3512 3513 vnic_add_client_data(adapter, vlcd); 3514 3515 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3516 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3517 netdev_dbg(adapter->netdev, "%016lx\n", 3518 ((unsigned long int *)(adapter->login_buf))[i]); 3519 } 3520 3521 memset(&crq, 0, sizeof(crq)); 3522 crq.login.first = IBMVNIC_CRQ_CMD; 3523 crq.login.cmd = LOGIN; 3524 crq.login.ioba = cpu_to_be32(buffer_token); 3525 crq.login.len = cpu_to_be32(buffer_size); 3526 ibmvnic_send_crq(adapter, &crq); 3527 3528 return 0; 3529 3530 buf_rsp_map_failed: 3531 kfree(login_rsp_buffer); 3532 buf_rsp_alloc_failed: 3533 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3534 buf_map_failed: 3535 kfree(login_buffer); 3536 buf_alloc_failed: 3537 return -1; 3538 } 3539 3540 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3541 u32 len, u8 map_id) 3542 { 3543 union ibmvnic_crq crq; 3544 3545 memset(&crq, 0, sizeof(crq)); 3546 crq.request_map.first = IBMVNIC_CRQ_CMD; 3547 crq.request_map.cmd = REQUEST_MAP; 3548 crq.request_map.map_id = map_id; 3549 crq.request_map.ioba = cpu_to_be32(addr); 3550 crq.request_map.len = cpu_to_be32(len); 3551 return ibmvnic_send_crq(adapter, &crq); 3552 } 3553 3554 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3555 { 3556 union ibmvnic_crq crq; 3557 3558 memset(&crq, 0, sizeof(crq)); 3559 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3560 crq.request_unmap.cmd = REQUEST_UNMAP; 3561 crq.request_unmap.map_id = map_id; 3562 return ibmvnic_send_crq(adapter, &crq); 3563 } 3564 3565 static void send_map_query(struct ibmvnic_adapter *adapter) 3566 { 3567 union ibmvnic_crq crq; 3568 3569 memset(&crq, 0, sizeof(crq)); 3570 crq.query_map.first = IBMVNIC_CRQ_CMD; 3571 crq.query_map.cmd = QUERY_MAP; 3572 ibmvnic_send_crq(adapter, &crq); 3573 } 3574 3575 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3576 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3577 { 3578 union ibmvnic_crq crq; 3579 3580 atomic_set(&adapter->running_cap_crqs, 0); 3581 memset(&crq, 0, sizeof(crq)); 3582 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3583 crq.query_capability.cmd = QUERY_CAPABILITY; 3584 3585 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3586 atomic_inc(&adapter->running_cap_crqs); 3587 ibmvnic_send_crq(adapter, &crq); 3588 3589 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3590 atomic_inc(&adapter->running_cap_crqs); 3591 ibmvnic_send_crq(adapter, &crq); 3592 3593 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3594 atomic_inc(&adapter->running_cap_crqs); 3595 ibmvnic_send_crq(adapter, &crq); 3596 3597 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3598 atomic_inc(&adapter->running_cap_crqs); 3599 ibmvnic_send_crq(adapter, &crq); 3600 3601 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3602 atomic_inc(&adapter->running_cap_crqs); 3603 ibmvnic_send_crq(adapter, &crq); 3604 3605 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3606 atomic_inc(&adapter->running_cap_crqs); 3607 ibmvnic_send_crq(adapter, &crq); 3608 3609 crq.query_capability.capability = 3610 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3611 atomic_inc(&adapter->running_cap_crqs); 3612 ibmvnic_send_crq(adapter, &crq); 3613 3614 crq.query_capability.capability = 3615 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3616 atomic_inc(&adapter->running_cap_crqs); 3617 ibmvnic_send_crq(adapter, &crq); 3618 3619 crq.query_capability.capability = 3620 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3621 atomic_inc(&adapter->running_cap_crqs); 3622 ibmvnic_send_crq(adapter, &crq); 3623 3624 crq.query_capability.capability = 3625 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3626 atomic_inc(&adapter->running_cap_crqs); 3627 ibmvnic_send_crq(adapter, &crq); 3628 3629 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3630 atomic_inc(&adapter->running_cap_crqs); 3631 ibmvnic_send_crq(adapter, &crq); 3632 3633 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3634 atomic_inc(&adapter->running_cap_crqs); 3635 ibmvnic_send_crq(adapter, &crq); 3636 3637 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3638 atomic_inc(&adapter->running_cap_crqs); 3639 ibmvnic_send_crq(adapter, &crq); 3640 3641 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3642 atomic_inc(&adapter->running_cap_crqs); 3643 ibmvnic_send_crq(adapter, &crq); 3644 3645 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3646 atomic_inc(&adapter->running_cap_crqs); 3647 ibmvnic_send_crq(adapter, &crq); 3648 3649 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3650 atomic_inc(&adapter->running_cap_crqs); 3651 ibmvnic_send_crq(adapter, &crq); 3652 3653 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3654 atomic_inc(&adapter->running_cap_crqs); 3655 ibmvnic_send_crq(adapter, &crq); 3656 3657 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3658 atomic_inc(&adapter->running_cap_crqs); 3659 ibmvnic_send_crq(adapter, &crq); 3660 3661 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3662 atomic_inc(&adapter->running_cap_crqs); 3663 ibmvnic_send_crq(adapter, &crq); 3664 3665 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3666 atomic_inc(&adapter->running_cap_crqs); 3667 ibmvnic_send_crq(adapter, &crq); 3668 3669 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3670 atomic_inc(&adapter->running_cap_crqs); 3671 ibmvnic_send_crq(adapter, &crq); 3672 3673 crq.query_capability.capability = 3674 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3675 atomic_inc(&adapter->running_cap_crqs); 3676 ibmvnic_send_crq(adapter, &crq); 3677 3678 crq.query_capability.capability = 3679 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3680 atomic_inc(&adapter->running_cap_crqs); 3681 ibmvnic_send_crq(adapter, &crq); 3682 3683 crq.query_capability.capability = 3684 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3685 atomic_inc(&adapter->running_cap_crqs); 3686 ibmvnic_send_crq(adapter, &crq); 3687 3688 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3689 atomic_inc(&adapter->running_cap_crqs); 3690 ibmvnic_send_crq(adapter, &crq); 3691 } 3692 3693 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3694 struct ibmvnic_adapter *adapter) 3695 { 3696 struct device *dev = &adapter->vdev->dev; 3697 3698 if (crq->get_vpd_size_rsp.rc.code) { 3699 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3700 crq->get_vpd_size_rsp.rc.code); 3701 complete(&adapter->fw_done); 3702 return; 3703 } 3704 3705 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3706 complete(&adapter->fw_done); 3707 } 3708 3709 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3710 struct ibmvnic_adapter *adapter) 3711 { 3712 struct device *dev = &adapter->vdev->dev; 3713 unsigned char *substr = NULL; 3714 u8 fw_level_len = 0; 3715 3716 memset(adapter->fw_version, 0, 32); 3717 3718 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3719 DMA_FROM_DEVICE); 3720 3721 if (crq->get_vpd_rsp.rc.code) { 3722 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3723 crq->get_vpd_rsp.rc.code); 3724 goto complete; 3725 } 3726 3727 /* get the position of the firmware version info 3728 * located after the ASCII 'RM' substring in the buffer 3729 */ 3730 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3731 if (!substr) { 3732 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3733 goto complete; 3734 } 3735 3736 /* get length of firmware level ASCII substring */ 3737 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3738 fw_level_len = *(substr + 2); 3739 } else { 3740 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3741 goto complete; 3742 } 3743 3744 /* copy firmware version string from vpd into adapter */ 3745 if ((substr + 3 + fw_level_len) < 3746 (adapter->vpd->buff + adapter->vpd->len)) { 3747 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3748 } else { 3749 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3750 } 3751 3752 complete: 3753 if (adapter->fw_version[0] == '\0') 3754 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3755 complete(&adapter->fw_done); 3756 } 3757 3758 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3759 { 3760 struct device *dev = &adapter->vdev->dev; 3761 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3762 union ibmvnic_crq crq; 3763 int i; 3764 3765 dma_unmap_single(dev, adapter->ip_offload_tok, 3766 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3767 3768 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3769 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3770 netdev_dbg(adapter->netdev, "%016lx\n", 3771 ((unsigned long int *)(buf))[i]); 3772 3773 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3774 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3775 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3776 buf->tcp_ipv4_chksum); 3777 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3778 buf->tcp_ipv6_chksum); 3779 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3780 buf->udp_ipv4_chksum); 3781 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3782 buf->udp_ipv6_chksum); 3783 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3784 buf->large_tx_ipv4); 3785 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3786 buf->large_tx_ipv6); 3787 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3788 buf->large_rx_ipv4); 3789 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3790 buf->large_rx_ipv6); 3791 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3792 buf->max_ipv4_header_size); 3793 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3794 buf->max_ipv6_header_size); 3795 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3796 buf->max_tcp_header_size); 3797 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3798 buf->max_udp_header_size); 3799 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3800 buf->max_large_tx_size); 3801 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3802 buf->max_large_rx_size); 3803 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3804 buf->ipv6_extension_header); 3805 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3806 buf->tcp_pseudosum_req); 3807 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3808 buf->num_ipv6_ext_headers); 3809 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3810 buf->off_ipv6_ext_headers); 3811 3812 adapter->ip_offload_ctrl_tok = 3813 dma_map_single(dev, &adapter->ip_offload_ctrl, 3814 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3815 3816 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3817 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3818 return; 3819 } 3820 3821 adapter->ip_offload_ctrl.len = 3822 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3823 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3824 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3825 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3826 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3827 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3828 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3829 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3830 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3831 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3832 3833 /* large_rx disabled for now, additional features needed */ 3834 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3835 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3836 3837 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3838 3839 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3840 adapter->netdev->features |= NETIF_F_IP_CSUM; 3841 3842 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3843 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3844 3845 if ((adapter->netdev->features & 3846 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3847 adapter->netdev->features |= NETIF_F_RXCSUM; 3848 3849 if (buf->large_tx_ipv4) 3850 adapter->netdev->features |= NETIF_F_TSO; 3851 if (buf->large_tx_ipv6) 3852 adapter->netdev->features |= NETIF_F_TSO6; 3853 3854 adapter->netdev->hw_features |= adapter->netdev->features; 3855 3856 memset(&crq, 0, sizeof(crq)); 3857 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3858 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3859 crq.control_ip_offload.len = 3860 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3861 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3862 ibmvnic_send_crq(adapter, &crq); 3863 } 3864 3865 static const char *ibmvnic_fw_err_cause(u16 cause) 3866 { 3867 switch (cause) { 3868 case ADAPTER_PROBLEM: 3869 return "adapter problem"; 3870 case BUS_PROBLEM: 3871 return "bus problem"; 3872 case FW_PROBLEM: 3873 return "firmware problem"; 3874 case DD_PROBLEM: 3875 return "device driver problem"; 3876 case EEH_RECOVERY: 3877 return "EEH recovery"; 3878 case FW_UPDATED: 3879 return "firmware updated"; 3880 case LOW_MEMORY: 3881 return "low Memory"; 3882 default: 3883 return "unknown"; 3884 } 3885 } 3886 3887 static void handle_error_indication(union ibmvnic_crq *crq, 3888 struct ibmvnic_adapter *adapter) 3889 { 3890 struct device *dev = &adapter->vdev->dev; 3891 u16 cause; 3892 3893 cause = be16_to_cpu(crq->error_indication.error_cause); 3894 3895 dev_warn_ratelimited(dev, 3896 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3897 crq->error_indication.flags 3898 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3899 ibmvnic_fw_err_cause(cause)); 3900 3901 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3902 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3903 else 3904 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3905 } 3906 3907 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3908 struct ibmvnic_adapter *adapter) 3909 { 3910 struct net_device *netdev = adapter->netdev; 3911 struct device *dev = &adapter->vdev->dev; 3912 long rc; 3913 3914 rc = crq->change_mac_addr_rsp.rc.code; 3915 if (rc) { 3916 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3917 goto out; 3918 } 3919 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3920 ETH_ALEN); 3921 out: 3922 complete(&adapter->fw_done); 3923 return rc; 3924 } 3925 3926 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3927 struct ibmvnic_adapter *adapter) 3928 { 3929 struct device *dev = &adapter->vdev->dev; 3930 u64 *req_value; 3931 char *name; 3932 3933 atomic_dec(&adapter->running_cap_crqs); 3934 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3935 case REQ_TX_QUEUES: 3936 req_value = &adapter->req_tx_queues; 3937 name = "tx"; 3938 break; 3939 case REQ_RX_QUEUES: 3940 req_value = &adapter->req_rx_queues; 3941 name = "rx"; 3942 break; 3943 case REQ_RX_ADD_QUEUES: 3944 req_value = &adapter->req_rx_add_queues; 3945 name = "rx_add"; 3946 break; 3947 case REQ_TX_ENTRIES_PER_SUBCRQ: 3948 req_value = &adapter->req_tx_entries_per_subcrq; 3949 name = "tx_entries_per_subcrq"; 3950 break; 3951 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3952 req_value = &adapter->req_rx_add_entries_per_subcrq; 3953 name = "rx_add_entries_per_subcrq"; 3954 break; 3955 case REQ_MTU: 3956 req_value = &adapter->req_mtu; 3957 name = "mtu"; 3958 break; 3959 case PROMISC_REQUESTED: 3960 req_value = &adapter->promisc; 3961 name = "promisc"; 3962 break; 3963 default: 3964 dev_err(dev, "Got invalid cap request rsp %d\n", 3965 crq->request_capability.capability); 3966 return; 3967 } 3968 3969 switch (crq->request_capability_rsp.rc.code) { 3970 case SUCCESS: 3971 break; 3972 case PARTIALSUCCESS: 3973 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3974 *req_value, 3975 (long int)be64_to_cpu(crq->request_capability_rsp. 3976 number), name); 3977 3978 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3979 REQ_MTU) { 3980 pr_err("mtu of %llu is not supported. Reverting.\n", 3981 *req_value); 3982 *req_value = adapter->fallback.mtu; 3983 } else { 3984 *req_value = 3985 be64_to_cpu(crq->request_capability_rsp.number); 3986 } 3987 3988 ibmvnic_send_req_caps(adapter, 1); 3989 return; 3990 default: 3991 dev_err(dev, "Error %d in request cap rsp\n", 3992 crq->request_capability_rsp.rc.code); 3993 return; 3994 } 3995 3996 /* Done receiving requested capabilities, query IP offload support */ 3997 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3998 union ibmvnic_crq newcrq; 3999 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4000 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4001 &adapter->ip_offload_buf; 4002 4003 adapter->wait_capability = false; 4004 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4005 buf_sz, 4006 DMA_FROM_DEVICE); 4007 4008 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4009 if (!firmware_has_feature(FW_FEATURE_CMO)) 4010 dev_err(dev, "Couldn't map offload buffer\n"); 4011 return; 4012 } 4013 4014 memset(&newcrq, 0, sizeof(newcrq)); 4015 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4016 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4017 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4018 newcrq.query_ip_offload.ioba = 4019 cpu_to_be32(adapter->ip_offload_tok); 4020 4021 ibmvnic_send_crq(adapter, &newcrq); 4022 } 4023 } 4024 4025 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4026 struct ibmvnic_adapter *adapter) 4027 { 4028 struct device *dev = &adapter->vdev->dev; 4029 struct net_device *netdev = adapter->netdev; 4030 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4031 struct ibmvnic_login_buffer *login = adapter->login_buf; 4032 int i; 4033 4034 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4035 DMA_TO_DEVICE); 4036 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4037 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4038 4039 /* If the number of queues requested can't be allocated by the 4040 * server, the login response will return with code 1. We will need 4041 * to resend the login buffer with fewer queues requested. 4042 */ 4043 if (login_rsp_crq->generic.rc.code) { 4044 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4045 complete(&adapter->init_done); 4046 return 0; 4047 } 4048 4049 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4050 4051 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4052 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4053 netdev_dbg(adapter->netdev, "%016lx\n", 4054 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4055 } 4056 4057 /* Sanity checks */ 4058 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4059 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4060 adapter->req_rx_add_queues != 4061 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4062 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4063 ibmvnic_remove(adapter->vdev); 4064 return -EIO; 4065 } 4066 release_login_buffer(adapter); 4067 complete(&adapter->init_done); 4068 4069 return 0; 4070 } 4071 4072 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4073 struct ibmvnic_adapter *adapter) 4074 { 4075 struct device *dev = &adapter->vdev->dev; 4076 long rc; 4077 4078 rc = crq->request_unmap_rsp.rc.code; 4079 if (rc) 4080 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4081 } 4082 4083 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4084 struct ibmvnic_adapter *adapter) 4085 { 4086 struct net_device *netdev = adapter->netdev; 4087 struct device *dev = &adapter->vdev->dev; 4088 long rc; 4089 4090 rc = crq->query_map_rsp.rc.code; 4091 if (rc) { 4092 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4093 return; 4094 } 4095 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4096 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4097 crq->query_map_rsp.free_pages); 4098 } 4099 4100 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4101 struct ibmvnic_adapter *adapter) 4102 { 4103 struct net_device *netdev = adapter->netdev; 4104 struct device *dev = &adapter->vdev->dev; 4105 long rc; 4106 4107 atomic_dec(&adapter->running_cap_crqs); 4108 netdev_dbg(netdev, "Outstanding queries: %d\n", 4109 atomic_read(&adapter->running_cap_crqs)); 4110 rc = crq->query_capability.rc.code; 4111 if (rc) { 4112 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4113 goto out; 4114 } 4115 4116 switch (be16_to_cpu(crq->query_capability.capability)) { 4117 case MIN_TX_QUEUES: 4118 adapter->min_tx_queues = 4119 be64_to_cpu(crq->query_capability.number); 4120 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4121 adapter->min_tx_queues); 4122 break; 4123 case MIN_RX_QUEUES: 4124 adapter->min_rx_queues = 4125 be64_to_cpu(crq->query_capability.number); 4126 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4127 adapter->min_rx_queues); 4128 break; 4129 case MIN_RX_ADD_QUEUES: 4130 adapter->min_rx_add_queues = 4131 be64_to_cpu(crq->query_capability.number); 4132 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4133 adapter->min_rx_add_queues); 4134 break; 4135 case MAX_TX_QUEUES: 4136 adapter->max_tx_queues = 4137 be64_to_cpu(crq->query_capability.number); 4138 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4139 adapter->max_tx_queues); 4140 break; 4141 case MAX_RX_QUEUES: 4142 adapter->max_rx_queues = 4143 be64_to_cpu(crq->query_capability.number); 4144 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4145 adapter->max_rx_queues); 4146 break; 4147 case MAX_RX_ADD_QUEUES: 4148 adapter->max_rx_add_queues = 4149 be64_to_cpu(crq->query_capability.number); 4150 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4151 adapter->max_rx_add_queues); 4152 break; 4153 case MIN_TX_ENTRIES_PER_SUBCRQ: 4154 adapter->min_tx_entries_per_subcrq = 4155 be64_to_cpu(crq->query_capability.number); 4156 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4157 adapter->min_tx_entries_per_subcrq); 4158 break; 4159 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4160 adapter->min_rx_add_entries_per_subcrq = 4161 be64_to_cpu(crq->query_capability.number); 4162 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4163 adapter->min_rx_add_entries_per_subcrq); 4164 break; 4165 case MAX_TX_ENTRIES_PER_SUBCRQ: 4166 adapter->max_tx_entries_per_subcrq = 4167 be64_to_cpu(crq->query_capability.number); 4168 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4169 adapter->max_tx_entries_per_subcrq); 4170 break; 4171 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4172 adapter->max_rx_add_entries_per_subcrq = 4173 be64_to_cpu(crq->query_capability.number); 4174 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4175 adapter->max_rx_add_entries_per_subcrq); 4176 break; 4177 case TCP_IP_OFFLOAD: 4178 adapter->tcp_ip_offload = 4179 be64_to_cpu(crq->query_capability.number); 4180 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4181 adapter->tcp_ip_offload); 4182 break; 4183 case PROMISC_SUPPORTED: 4184 adapter->promisc_supported = 4185 be64_to_cpu(crq->query_capability.number); 4186 netdev_dbg(netdev, "promisc_supported = %lld\n", 4187 adapter->promisc_supported); 4188 break; 4189 case MIN_MTU: 4190 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4191 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4192 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4193 break; 4194 case MAX_MTU: 4195 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4196 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4197 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4198 break; 4199 case MAX_MULTICAST_FILTERS: 4200 adapter->max_multicast_filters = 4201 be64_to_cpu(crq->query_capability.number); 4202 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4203 adapter->max_multicast_filters); 4204 break; 4205 case VLAN_HEADER_INSERTION: 4206 adapter->vlan_header_insertion = 4207 be64_to_cpu(crq->query_capability.number); 4208 if (adapter->vlan_header_insertion) 4209 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4210 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4211 adapter->vlan_header_insertion); 4212 break; 4213 case RX_VLAN_HEADER_INSERTION: 4214 adapter->rx_vlan_header_insertion = 4215 be64_to_cpu(crq->query_capability.number); 4216 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4217 adapter->rx_vlan_header_insertion); 4218 break; 4219 case MAX_TX_SG_ENTRIES: 4220 adapter->max_tx_sg_entries = 4221 be64_to_cpu(crq->query_capability.number); 4222 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4223 adapter->max_tx_sg_entries); 4224 break; 4225 case RX_SG_SUPPORTED: 4226 adapter->rx_sg_supported = 4227 be64_to_cpu(crq->query_capability.number); 4228 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4229 adapter->rx_sg_supported); 4230 break; 4231 case OPT_TX_COMP_SUB_QUEUES: 4232 adapter->opt_tx_comp_sub_queues = 4233 be64_to_cpu(crq->query_capability.number); 4234 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4235 adapter->opt_tx_comp_sub_queues); 4236 break; 4237 case OPT_RX_COMP_QUEUES: 4238 adapter->opt_rx_comp_queues = 4239 be64_to_cpu(crq->query_capability.number); 4240 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4241 adapter->opt_rx_comp_queues); 4242 break; 4243 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4244 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4245 be64_to_cpu(crq->query_capability.number); 4246 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4247 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4248 break; 4249 case OPT_TX_ENTRIES_PER_SUBCRQ: 4250 adapter->opt_tx_entries_per_subcrq = 4251 be64_to_cpu(crq->query_capability.number); 4252 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4253 adapter->opt_tx_entries_per_subcrq); 4254 break; 4255 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4256 adapter->opt_rxba_entries_per_subcrq = 4257 be64_to_cpu(crq->query_capability.number); 4258 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4259 adapter->opt_rxba_entries_per_subcrq); 4260 break; 4261 case TX_RX_DESC_REQ: 4262 adapter->tx_rx_desc_req = crq->query_capability.number; 4263 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4264 adapter->tx_rx_desc_req); 4265 break; 4266 4267 default: 4268 netdev_err(netdev, "Got invalid cap rsp %d\n", 4269 crq->query_capability.capability); 4270 } 4271 4272 out: 4273 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4274 adapter->wait_capability = false; 4275 ibmvnic_send_req_caps(adapter, 0); 4276 } 4277 } 4278 4279 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4280 struct ibmvnic_adapter *adapter) 4281 { 4282 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4283 struct net_device *netdev = adapter->netdev; 4284 struct device *dev = &adapter->vdev->dev; 4285 u64 *u64_crq = (u64 *)crq; 4286 long rc; 4287 4288 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4289 (unsigned long int)cpu_to_be64(u64_crq[0]), 4290 (unsigned long int)cpu_to_be64(u64_crq[1])); 4291 switch (gen_crq->first) { 4292 case IBMVNIC_CRQ_INIT_RSP: 4293 switch (gen_crq->cmd) { 4294 case IBMVNIC_CRQ_INIT: 4295 dev_info(dev, "Partner initialized\n"); 4296 adapter->from_passive_init = true; 4297 adapter->failover_pending = false; 4298 if (!completion_done(&adapter->init_done)) { 4299 complete(&adapter->init_done); 4300 adapter->init_done_rc = -EIO; 4301 } 4302 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4303 break; 4304 case IBMVNIC_CRQ_INIT_COMPLETE: 4305 dev_info(dev, "Partner initialization complete\n"); 4306 adapter->crq.active = true; 4307 send_version_xchg(adapter); 4308 break; 4309 default: 4310 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4311 } 4312 return; 4313 case IBMVNIC_CRQ_XPORT_EVENT: 4314 netif_carrier_off(netdev); 4315 adapter->crq.active = false; 4316 if (adapter->resetting) 4317 adapter->force_reset_recovery = true; 4318 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4319 dev_info(dev, "Migrated, re-enabling adapter\n"); 4320 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4321 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4322 dev_info(dev, "Backing device failover detected\n"); 4323 adapter->failover_pending = true; 4324 } else { 4325 /* The adapter lost the connection */ 4326 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4327 gen_crq->cmd); 4328 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4329 } 4330 return; 4331 case IBMVNIC_CRQ_CMD_RSP: 4332 break; 4333 default: 4334 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4335 gen_crq->first); 4336 return; 4337 } 4338 4339 switch (gen_crq->cmd) { 4340 case VERSION_EXCHANGE_RSP: 4341 rc = crq->version_exchange_rsp.rc.code; 4342 if (rc) { 4343 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4344 break; 4345 } 4346 dev_info(dev, "Partner protocol version is %d\n", 4347 crq->version_exchange_rsp.version); 4348 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4349 ibmvnic_version) 4350 ibmvnic_version = 4351 be16_to_cpu(crq->version_exchange_rsp.version); 4352 send_cap_queries(adapter); 4353 break; 4354 case QUERY_CAPABILITY_RSP: 4355 handle_query_cap_rsp(crq, adapter); 4356 break; 4357 case QUERY_MAP_RSP: 4358 handle_query_map_rsp(crq, adapter); 4359 break; 4360 case REQUEST_MAP_RSP: 4361 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4362 complete(&adapter->fw_done); 4363 break; 4364 case REQUEST_UNMAP_RSP: 4365 handle_request_unmap_rsp(crq, adapter); 4366 break; 4367 case REQUEST_CAPABILITY_RSP: 4368 handle_request_cap_rsp(crq, adapter); 4369 break; 4370 case LOGIN_RSP: 4371 netdev_dbg(netdev, "Got Login Response\n"); 4372 handle_login_rsp(crq, adapter); 4373 break; 4374 case LOGICAL_LINK_STATE_RSP: 4375 netdev_dbg(netdev, 4376 "Got Logical Link State Response, state: %d rc: %d\n", 4377 crq->logical_link_state_rsp.link_state, 4378 crq->logical_link_state_rsp.rc.code); 4379 adapter->logical_link_state = 4380 crq->logical_link_state_rsp.link_state; 4381 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4382 complete(&adapter->init_done); 4383 break; 4384 case LINK_STATE_INDICATION: 4385 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4386 adapter->phys_link_state = 4387 crq->link_state_indication.phys_link_state; 4388 adapter->logical_link_state = 4389 crq->link_state_indication.logical_link_state; 4390 break; 4391 case CHANGE_MAC_ADDR_RSP: 4392 netdev_dbg(netdev, "Got MAC address change Response\n"); 4393 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4394 break; 4395 case ERROR_INDICATION: 4396 netdev_dbg(netdev, "Got Error Indication\n"); 4397 handle_error_indication(crq, adapter); 4398 break; 4399 case REQUEST_STATISTICS_RSP: 4400 netdev_dbg(netdev, "Got Statistics Response\n"); 4401 complete(&adapter->stats_done); 4402 break; 4403 case QUERY_IP_OFFLOAD_RSP: 4404 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4405 handle_query_ip_offload_rsp(adapter); 4406 break; 4407 case MULTICAST_CTRL_RSP: 4408 netdev_dbg(netdev, "Got multicast control Response\n"); 4409 break; 4410 case CONTROL_IP_OFFLOAD_RSP: 4411 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4412 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4413 sizeof(adapter->ip_offload_ctrl), 4414 DMA_TO_DEVICE); 4415 complete(&adapter->init_done); 4416 break; 4417 case COLLECT_FW_TRACE_RSP: 4418 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4419 complete(&adapter->fw_done); 4420 break; 4421 case GET_VPD_SIZE_RSP: 4422 handle_vpd_size_rsp(crq, adapter); 4423 break; 4424 case GET_VPD_RSP: 4425 handle_vpd_rsp(crq, adapter); 4426 break; 4427 default: 4428 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4429 gen_crq->cmd); 4430 } 4431 } 4432 4433 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4434 { 4435 struct ibmvnic_adapter *adapter = instance; 4436 4437 tasklet_schedule(&adapter->tasklet); 4438 return IRQ_HANDLED; 4439 } 4440 4441 static void ibmvnic_tasklet(void *data) 4442 { 4443 struct ibmvnic_adapter *adapter = data; 4444 struct ibmvnic_crq_queue *queue = &adapter->crq; 4445 union ibmvnic_crq *crq; 4446 unsigned long flags; 4447 bool done = false; 4448 4449 spin_lock_irqsave(&queue->lock, flags); 4450 while (!done) { 4451 /* Pull all the valid messages off the CRQ */ 4452 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4453 ibmvnic_handle_crq(crq, adapter); 4454 crq->generic.first = 0; 4455 } 4456 4457 /* remain in tasklet until all 4458 * capabilities responses are received 4459 */ 4460 if (!adapter->wait_capability) 4461 done = true; 4462 } 4463 /* if capabilities CRQ's were sent in this tasklet, the following 4464 * tasklet must wait until all responses are received 4465 */ 4466 if (atomic_read(&adapter->running_cap_crqs) != 0) 4467 adapter->wait_capability = true; 4468 spin_unlock_irqrestore(&queue->lock, flags); 4469 } 4470 4471 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4472 { 4473 struct vio_dev *vdev = adapter->vdev; 4474 int rc; 4475 4476 do { 4477 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4478 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4479 4480 if (rc) 4481 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4482 4483 return rc; 4484 } 4485 4486 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4487 { 4488 struct ibmvnic_crq_queue *crq = &adapter->crq; 4489 struct device *dev = &adapter->vdev->dev; 4490 struct vio_dev *vdev = adapter->vdev; 4491 int rc; 4492 4493 /* Close the CRQ */ 4494 do { 4495 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4496 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4497 4498 /* Clean out the queue */ 4499 memset(crq->msgs, 0, PAGE_SIZE); 4500 crq->cur = 0; 4501 crq->active = false; 4502 4503 /* And re-open it again */ 4504 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4505 crq->msg_token, PAGE_SIZE); 4506 4507 if (rc == H_CLOSED) 4508 /* Adapter is good, but other end is not ready */ 4509 dev_warn(dev, "Partner adapter not ready\n"); 4510 else if (rc != 0) 4511 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4512 4513 return rc; 4514 } 4515 4516 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4517 { 4518 struct ibmvnic_crq_queue *crq = &adapter->crq; 4519 struct vio_dev *vdev = adapter->vdev; 4520 long rc; 4521 4522 if (!crq->msgs) 4523 return; 4524 4525 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4526 free_irq(vdev->irq, adapter); 4527 tasklet_kill(&adapter->tasklet); 4528 do { 4529 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4530 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4531 4532 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4533 DMA_BIDIRECTIONAL); 4534 free_page((unsigned long)crq->msgs); 4535 crq->msgs = NULL; 4536 crq->active = false; 4537 } 4538 4539 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4540 { 4541 struct ibmvnic_crq_queue *crq = &adapter->crq; 4542 struct device *dev = &adapter->vdev->dev; 4543 struct vio_dev *vdev = adapter->vdev; 4544 int rc, retrc = -ENOMEM; 4545 4546 if (crq->msgs) 4547 return 0; 4548 4549 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4550 /* Should we allocate more than one page? */ 4551 4552 if (!crq->msgs) 4553 return -ENOMEM; 4554 4555 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4556 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4557 DMA_BIDIRECTIONAL); 4558 if (dma_mapping_error(dev, crq->msg_token)) 4559 goto map_failed; 4560 4561 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4562 crq->msg_token, PAGE_SIZE); 4563 4564 if (rc == H_RESOURCE) 4565 /* maybe kexecing and resource is busy. try a reset */ 4566 rc = ibmvnic_reset_crq(adapter); 4567 retrc = rc; 4568 4569 if (rc == H_CLOSED) { 4570 dev_warn(dev, "Partner adapter not ready\n"); 4571 } else if (rc) { 4572 dev_warn(dev, "Error %d opening adapter\n", rc); 4573 goto reg_crq_failed; 4574 } 4575 4576 retrc = 0; 4577 4578 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4579 (unsigned long)adapter); 4580 4581 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4582 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4583 adapter); 4584 if (rc) { 4585 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4586 vdev->irq, rc); 4587 goto req_irq_failed; 4588 } 4589 4590 rc = vio_enable_interrupts(vdev); 4591 if (rc) { 4592 dev_err(dev, "Error %d enabling interrupts\n", rc); 4593 goto req_irq_failed; 4594 } 4595 4596 crq->cur = 0; 4597 spin_lock_init(&crq->lock); 4598 4599 return retrc; 4600 4601 req_irq_failed: 4602 tasklet_kill(&adapter->tasklet); 4603 do { 4604 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4605 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4606 reg_crq_failed: 4607 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4608 map_failed: 4609 free_page((unsigned long)crq->msgs); 4610 crq->msgs = NULL; 4611 return retrc; 4612 } 4613 4614 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4615 { 4616 struct device *dev = &adapter->vdev->dev; 4617 unsigned long timeout = msecs_to_jiffies(30000); 4618 u64 old_num_rx_queues, old_num_tx_queues; 4619 int rc; 4620 4621 adapter->from_passive_init = false; 4622 4623 old_num_rx_queues = adapter->req_rx_queues; 4624 old_num_tx_queues = adapter->req_tx_queues; 4625 4626 init_completion(&adapter->init_done); 4627 adapter->init_done_rc = 0; 4628 ibmvnic_send_crq_init(adapter); 4629 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4630 dev_err(dev, "Initialization sequence timed out\n"); 4631 return -1; 4632 } 4633 4634 if (adapter->init_done_rc) { 4635 release_crq_queue(adapter); 4636 return adapter->init_done_rc; 4637 } 4638 4639 if (adapter->from_passive_init) { 4640 adapter->state = VNIC_OPEN; 4641 adapter->from_passive_init = false; 4642 return -1; 4643 } 4644 4645 if (adapter->resetting && !adapter->wait_for_reset && 4646 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4647 if (adapter->req_rx_queues != old_num_rx_queues || 4648 adapter->req_tx_queues != old_num_tx_queues) { 4649 release_sub_crqs(adapter, 0); 4650 rc = init_sub_crqs(adapter); 4651 } else { 4652 rc = reset_sub_crq_queues(adapter); 4653 } 4654 } else { 4655 rc = init_sub_crqs(adapter); 4656 } 4657 4658 if (rc) { 4659 dev_err(dev, "Initialization of sub crqs failed\n"); 4660 release_crq_queue(adapter); 4661 return rc; 4662 } 4663 4664 rc = init_sub_crq_irqs(adapter); 4665 if (rc) { 4666 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4667 release_crq_queue(adapter); 4668 } 4669 4670 return rc; 4671 } 4672 4673 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4674 { 4675 struct device *dev = &adapter->vdev->dev; 4676 unsigned long timeout = msecs_to_jiffies(30000); 4677 int rc; 4678 4679 adapter->from_passive_init = false; 4680 4681 init_completion(&adapter->init_done); 4682 adapter->init_done_rc = 0; 4683 ibmvnic_send_crq_init(adapter); 4684 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4685 dev_err(dev, "Initialization sequence timed out\n"); 4686 return -1; 4687 } 4688 4689 if (adapter->init_done_rc) { 4690 release_crq_queue(adapter); 4691 return adapter->init_done_rc; 4692 } 4693 4694 if (adapter->from_passive_init) { 4695 adapter->state = VNIC_OPEN; 4696 adapter->from_passive_init = false; 4697 return -1; 4698 } 4699 4700 rc = init_sub_crqs(adapter); 4701 if (rc) { 4702 dev_err(dev, "Initialization of sub crqs failed\n"); 4703 release_crq_queue(adapter); 4704 return rc; 4705 } 4706 4707 rc = init_sub_crq_irqs(adapter); 4708 if (rc) { 4709 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4710 release_crq_queue(adapter); 4711 } 4712 4713 return rc; 4714 } 4715 4716 static struct device_attribute dev_attr_failover; 4717 4718 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4719 { 4720 struct ibmvnic_adapter *adapter; 4721 struct net_device *netdev; 4722 unsigned char *mac_addr_p; 4723 int rc; 4724 4725 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4726 dev->unit_address); 4727 4728 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4729 VETH_MAC_ADDR, NULL); 4730 if (!mac_addr_p) { 4731 dev_err(&dev->dev, 4732 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4733 __FILE__, __LINE__); 4734 return 0; 4735 } 4736 4737 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4738 IBMVNIC_MAX_QUEUES); 4739 if (!netdev) 4740 return -ENOMEM; 4741 4742 adapter = netdev_priv(netdev); 4743 adapter->state = VNIC_PROBING; 4744 dev_set_drvdata(&dev->dev, netdev); 4745 adapter->vdev = dev; 4746 adapter->netdev = netdev; 4747 4748 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4749 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4750 netdev->irq = dev->irq; 4751 netdev->netdev_ops = &ibmvnic_netdev_ops; 4752 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4753 SET_NETDEV_DEV(netdev, &dev->dev); 4754 4755 spin_lock_init(&adapter->stats_lock); 4756 4757 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4758 INIT_LIST_HEAD(&adapter->rwi_list); 4759 mutex_init(&adapter->rwi_lock); 4760 adapter->resetting = false; 4761 4762 adapter->mac_change_pending = false; 4763 4764 do { 4765 rc = init_crq_queue(adapter); 4766 if (rc) { 4767 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4768 rc); 4769 goto ibmvnic_init_fail; 4770 } 4771 4772 rc = ibmvnic_init(adapter); 4773 if (rc && rc != EAGAIN) 4774 goto ibmvnic_init_fail; 4775 } while (rc == EAGAIN); 4776 4777 rc = init_stats_buffers(adapter); 4778 if (rc) 4779 goto ibmvnic_init_fail; 4780 4781 rc = init_stats_token(adapter); 4782 if (rc) 4783 goto ibmvnic_stats_fail; 4784 4785 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4786 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4787 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4788 4789 rc = device_create_file(&dev->dev, &dev_attr_failover); 4790 if (rc) 4791 goto ibmvnic_dev_file_err; 4792 4793 netif_carrier_off(netdev); 4794 rc = register_netdev(netdev); 4795 if (rc) { 4796 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4797 goto ibmvnic_register_fail; 4798 } 4799 dev_info(&dev->dev, "ibmvnic registered\n"); 4800 4801 adapter->state = VNIC_PROBED; 4802 4803 adapter->wait_for_reset = false; 4804 4805 return 0; 4806 4807 ibmvnic_register_fail: 4808 device_remove_file(&dev->dev, &dev_attr_failover); 4809 4810 ibmvnic_dev_file_err: 4811 release_stats_token(adapter); 4812 4813 ibmvnic_stats_fail: 4814 release_stats_buffers(adapter); 4815 4816 ibmvnic_init_fail: 4817 release_sub_crqs(adapter, 1); 4818 release_crq_queue(adapter); 4819 free_netdev(netdev); 4820 4821 return rc; 4822 } 4823 4824 static int ibmvnic_remove(struct vio_dev *dev) 4825 { 4826 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4827 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4828 4829 adapter->state = VNIC_REMOVING; 4830 rtnl_lock(); 4831 unregister_netdevice(netdev); 4832 4833 release_resources(adapter); 4834 release_sub_crqs(adapter, 1); 4835 release_crq_queue(adapter); 4836 4837 release_stats_token(adapter); 4838 release_stats_buffers(adapter); 4839 4840 adapter->state = VNIC_REMOVED; 4841 4842 rtnl_unlock(); 4843 device_remove_file(&dev->dev, &dev_attr_failover); 4844 free_netdev(netdev); 4845 dev_set_drvdata(&dev->dev, NULL); 4846 4847 return 0; 4848 } 4849 4850 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4851 const char *buf, size_t count) 4852 { 4853 struct net_device *netdev = dev_get_drvdata(dev); 4854 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4855 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4856 __be64 session_token; 4857 long rc; 4858 4859 if (!sysfs_streq(buf, "1")) 4860 return -EINVAL; 4861 4862 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4863 H_GET_SESSION_TOKEN, 0, 0, 0); 4864 if (rc) { 4865 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4866 rc); 4867 return -EINVAL; 4868 } 4869 4870 session_token = (__be64)retbuf[0]; 4871 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4872 be64_to_cpu(session_token)); 4873 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4874 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4875 if (rc) { 4876 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4877 rc); 4878 return -EINVAL; 4879 } 4880 4881 return count; 4882 } 4883 4884 static DEVICE_ATTR_WO(failover); 4885 4886 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4887 { 4888 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4889 struct ibmvnic_adapter *adapter; 4890 struct iommu_table *tbl; 4891 unsigned long ret = 0; 4892 int i; 4893 4894 tbl = get_iommu_table_base(&vdev->dev); 4895 4896 /* netdev inits at probe time along with the structures we need below*/ 4897 if (!netdev) 4898 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4899 4900 adapter = netdev_priv(netdev); 4901 4902 ret += PAGE_SIZE; /* the crq message queue */ 4903 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4904 4905 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4906 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4907 4908 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4909 i++) 4910 ret += adapter->rx_pool[i].size * 4911 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4912 4913 return ret; 4914 } 4915 4916 static int ibmvnic_resume(struct device *dev) 4917 { 4918 struct net_device *netdev = dev_get_drvdata(dev); 4919 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4920 4921 if (adapter->state != VNIC_OPEN) 4922 return 0; 4923 4924 tasklet_schedule(&adapter->tasklet); 4925 4926 return 0; 4927 } 4928 4929 static const struct vio_device_id ibmvnic_device_table[] = { 4930 {"network", "IBM,vnic"}, 4931 {"", "" } 4932 }; 4933 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4934 4935 static const struct dev_pm_ops ibmvnic_pm_ops = { 4936 .resume = ibmvnic_resume 4937 }; 4938 4939 static struct vio_driver ibmvnic_driver = { 4940 .id_table = ibmvnic_device_table, 4941 .probe = ibmvnic_probe, 4942 .remove = ibmvnic_remove, 4943 .get_desired_dma = ibmvnic_get_desired_dma, 4944 .name = ibmvnic_driver_name, 4945 .pm = &ibmvnic_pm_ops, 4946 }; 4947 4948 /* module functions */ 4949 static int __init ibmvnic_module_init(void) 4950 { 4951 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4952 IBMVNIC_DRIVER_VERSION); 4953 4954 return vio_register_driver(&ibmvnic_driver); 4955 } 4956 4957 static void __exit ibmvnic_module_exit(void) 4958 { 4959 vio_unregister_driver(&ibmvnic_driver); 4960 } 4961 4962 module_init(ibmvnic_module_init); 4963 module_exit(ibmvnic_module_exit); 4964