1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static int send_request_unmap(struct ibmvnic_adapter *, u8); 114 static int send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 120 static void release_crq_queue(struct ibmvnic_adapter *); 121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 122 static int init_crq_queue(struct ibmvnic_adapter *adapter); 123 124 struct ibmvnic_stat { 125 char name[ETH_GSTRING_LEN]; 126 int offset; 127 }; 128 129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 130 offsetof(struct ibmvnic_statistics, stat)) 131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 132 133 static const struct ibmvnic_stat ibmvnic_stats[] = { 134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 156 }; 157 158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 159 unsigned long length, unsigned long *number, 160 unsigned long *irq) 161 { 162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 163 long rc; 164 165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 166 *number = retbuf[0]; 167 *irq = retbuf[1]; 168 169 return rc; 170 } 171 172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 173 struct ibmvnic_long_term_buff *ltb, int size) 174 { 175 struct device *dev = &adapter->vdev->dev; 176 int rc; 177 178 ltb->size = size; 179 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 180 GFP_KERNEL); 181 182 if (!ltb->buff) { 183 dev_err(dev, "Couldn't alloc long term buffer\n"); 184 return -ENOMEM; 185 } 186 ltb->map_id = adapter->map_id; 187 adapter->map_id++; 188 189 init_completion(&adapter->fw_done); 190 rc = send_request_map(adapter, ltb->addr, 191 ltb->size, ltb->map_id); 192 if (rc) { 193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 194 return rc; 195 } 196 wait_for_completion(&adapter->fw_done); 197 198 if (adapter->fw_done_rc) { 199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 200 adapter->fw_done_rc); 201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 202 return -1; 203 } 204 return 0; 205 } 206 207 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 208 struct ibmvnic_long_term_buff *ltb) 209 { 210 struct device *dev = &adapter->vdev->dev; 211 212 if (!ltb->buff) 213 return; 214 215 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 216 adapter->reset_reason != VNIC_RESET_MOBILITY) 217 send_request_unmap(adapter, ltb->map_id); 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 } 220 221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 222 struct ibmvnic_long_term_buff *ltb) 223 { 224 int rc; 225 226 memset(ltb->buff, 0, ltb->size); 227 228 init_completion(&adapter->fw_done); 229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 230 if (rc) 231 return rc; 232 wait_for_completion(&adapter->fw_done); 233 234 if (adapter->fw_done_rc) { 235 dev_info(&adapter->vdev->dev, 236 "Reset failed, attempting to free and reallocate buffer\n"); 237 free_long_term_buff(adapter, ltb); 238 return alloc_long_term_buff(adapter, ltb, ltb->size); 239 } 240 return 0; 241 } 242 243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 244 { 245 int i; 246 247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 248 i++) 249 adapter->rx_pool[i].active = 0; 250 } 251 252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 253 struct ibmvnic_rx_pool *pool) 254 { 255 int count = pool->size - atomic_read(&pool->available); 256 struct device *dev = &adapter->vdev->dev; 257 int buffers_added = 0; 258 unsigned long lpar_rc; 259 union sub_crq sub_crq; 260 struct sk_buff *skb; 261 unsigned int offset; 262 dma_addr_t dma_addr; 263 unsigned char *dst; 264 u64 *handle_array; 265 int shift = 0; 266 int index; 267 int i; 268 269 if (!pool->active) 270 return; 271 272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 273 be32_to_cpu(adapter->login_rsp_buf-> 274 off_rxadd_subcrqs)); 275 276 for (i = 0; i < count; ++i) { 277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 278 if (!skb) { 279 dev_err(dev, "Couldn't replenish rx buff\n"); 280 adapter->replenish_no_mem++; 281 break; 282 } 283 284 index = pool->free_map[pool->next_free]; 285 286 if (pool->rx_buff[index].skb) 287 dev_err(dev, "Inconsistent free_map!\n"); 288 289 /* Copy the skb to the long term mapped DMA buffer */ 290 offset = index * pool->buff_size; 291 dst = pool->long_term_buff.buff + offset; 292 memset(dst, 0, pool->buff_size); 293 dma_addr = pool->long_term_buff.addr + offset; 294 pool->rx_buff[index].data = dst; 295 296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 297 pool->rx_buff[index].dma = dma_addr; 298 pool->rx_buff[index].skb = skb; 299 pool->rx_buff[index].pool_index = pool->index; 300 pool->rx_buff[index].size = pool->buff_size; 301 302 memset(&sub_crq, 0, sizeof(sub_crq)); 303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 304 sub_crq.rx_add.correlator = 305 cpu_to_be64((u64)&pool->rx_buff[index]); 306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 308 309 /* The length field of the sCRQ is defined to be 24 bits so the 310 * buffer size needs to be left shifted by a byte before it is 311 * converted to big endian to prevent the last byte from being 312 * truncated. 313 */ 314 #ifdef __LITTLE_ENDIAN__ 315 shift = 8; 316 #endif 317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 318 319 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 320 &sub_crq); 321 if (lpar_rc != H_SUCCESS) 322 goto failure; 323 324 buffers_added++; 325 adapter->replenish_add_buff_success++; 326 pool->next_free = (pool->next_free + 1) % pool->size; 327 } 328 atomic_add(buffers_added, &pool->available); 329 return; 330 331 failure: 332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 334 pool->free_map[pool->next_free] = index; 335 pool->rx_buff[index].skb = NULL; 336 337 dev_kfree_skb_any(skb); 338 adapter->replenish_add_buff_failure++; 339 atomic_add(buffers_added, &pool->available); 340 341 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 342 /* Disable buffer pool replenishment and report carrier off if 343 * queue is closed or pending failover. 344 * Firmware guarantees that a signal will be sent to the 345 * driver, triggering a reset. 346 */ 347 deactivate_rx_pools(adapter); 348 netif_carrier_off(adapter->netdev); 349 } 350 } 351 352 static void replenish_pools(struct ibmvnic_adapter *adapter) 353 { 354 int i; 355 356 adapter->replenish_task_cycles++; 357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 358 i++) { 359 if (adapter->rx_pool[i].active) 360 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 361 } 362 } 363 364 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 365 { 366 kfree(adapter->tx_stats_buffers); 367 kfree(adapter->rx_stats_buffers); 368 adapter->tx_stats_buffers = NULL; 369 adapter->rx_stats_buffers = NULL; 370 } 371 372 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 373 { 374 adapter->tx_stats_buffers = 375 kcalloc(IBMVNIC_MAX_QUEUES, 376 sizeof(struct ibmvnic_tx_queue_stats), 377 GFP_KERNEL); 378 if (!adapter->tx_stats_buffers) 379 return -ENOMEM; 380 381 adapter->rx_stats_buffers = 382 kcalloc(IBMVNIC_MAX_QUEUES, 383 sizeof(struct ibmvnic_rx_queue_stats), 384 GFP_KERNEL); 385 if (!adapter->rx_stats_buffers) 386 return -ENOMEM; 387 388 return 0; 389 } 390 391 static void release_stats_token(struct ibmvnic_adapter *adapter) 392 { 393 struct device *dev = &adapter->vdev->dev; 394 395 if (!adapter->stats_token) 396 return; 397 398 dma_unmap_single(dev, adapter->stats_token, 399 sizeof(struct ibmvnic_statistics), 400 DMA_FROM_DEVICE); 401 adapter->stats_token = 0; 402 } 403 404 static int init_stats_token(struct ibmvnic_adapter *adapter) 405 { 406 struct device *dev = &adapter->vdev->dev; 407 dma_addr_t stok; 408 409 stok = dma_map_single(dev, &adapter->stats, 410 sizeof(struct ibmvnic_statistics), 411 DMA_FROM_DEVICE); 412 if (dma_mapping_error(dev, stok)) { 413 dev_err(dev, "Couldn't map stats buffer\n"); 414 return -1; 415 } 416 417 adapter->stats_token = stok; 418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 419 return 0; 420 } 421 422 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 423 { 424 struct ibmvnic_rx_pool *rx_pool; 425 int rx_scrqs; 426 int i, j, rc; 427 u64 *size_array; 428 429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 431 432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 433 for (i = 0; i < rx_scrqs; i++) { 434 rx_pool = &adapter->rx_pool[i]; 435 436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 437 438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 439 free_long_term_buff(adapter, &rx_pool->long_term_buff); 440 rx_pool->buff_size = be64_to_cpu(size_array[i]); 441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 442 rx_pool->size * 443 rx_pool->buff_size); 444 } else { 445 rc = reset_long_term_buff(adapter, 446 &rx_pool->long_term_buff); 447 } 448 449 if (rc) 450 return rc; 451 452 for (j = 0; j < rx_pool->size; j++) 453 rx_pool->free_map[j] = j; 454 455 memset(rx_pool->rx_buff, 0, 456 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 457 458 atomic_set(&rx_pool->available, 0); 459 rx_pool->next_alloc = 0; 460 rx_pool->next_free = 0; 461 rx_pool->active = 1; 462 } 463 464 return 0; 465 } 466 467 static void release_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 int i, j; 471 472 if (!adapter->rx_pool) 473 return; 474 475 for (i = 0; i < adapter->num_active_rx_pools; i++) { 476 rx_pool = &adapter->rx_pool[i]; 477 478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 479 480 kfree(rx_pool->free_map); 481 free_long_term_buff(adapter, &rx_pool->long_term_buff); 482 483 if (!rx_pool->rx_buff) 484 continue; 485 486 for (j = 0; j < rx_pool->size; j++) { 487 if (rx_pool->rx_buff[j].skb) { 488 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 489 rx_pool->rx_buff[j].skb = NULL; 490 } 491 } 492 493 kfree(rx_pool->rx_buff); 494 } 495 496 kfree(adapter->rx_pool); 497 adapter->rx_pool = NULL; 498 adapter->num_active_rx_pools = 0; 499 } 500 501 static int init_rx_pools(struct net_device *netdev) 502 { 503 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 504 struct device *dev = &adapter->vdev->dev; 505 struct ibmvnic_rx_pool *rx_pool; 506 int rxadd_subcrqs; 507 u64 *size_array; 508 int i, j; 509 510 rxadd_subcrqs = 511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 514 515 adapter->rx_pool = kcalloc(rxadd_subcrqs, 516 sizeof(struct ibmvnic_rx_pool), 517 GFP_KERNEL); 518 if (!adapter->rx_pool) { 519 dev_err(dev, "Failed to allocate rx pools\n"); 520 return -1; 521 } 522 523 adapter->num_active_rx_pools = rxadd_subcrqs; 524 525 for (i = 0; i < rxadd_subcrqs; i++) { 526 rx_pool = &adapter->rx_pool[i]; 527 528 netdev_dbg(adapter->netdev, 529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 530 i, adapter->req_rx_add_entries_per_subcrq, 531 be64_to_cpu(size_array[i])); 532 533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 534 rx_pool->index = i; 535 rx_pool->buff_size = be64_to_cpu(size_array[i]); 536 rx_pool->active = 1; 537 538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 539 GFP_KERNEL); 540 if (!rx_pool->free_map) { 541 release_rx_pools(adapter); 542 return -1; 543 } 544 545 rx_pool->rx_buff = kcalloc(rx_pool->size, 546 sizeof(struct ibmvnic_rx_buff), 547 GFP_KERNEL); 548 if (!rx_pool->rx_buff) { 549 dev_err(dev, "Couldn't alloc rx buffers\n"); 550 release_rx_pools(adapter); 551 return -1; 552 } 553 554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 555 rx_pool->size * rx_pool->buff_size)) { 556 release_rx_pools(adapter); 557 return -1; 558 } 559 560 for (j = 0; j < rx_pool->size; ++j) 561 rx_pool->free_map[j] = j; 562 563 atomic_set(&rx_pool->available, 0); 564 rx_pool->next_alloc = 0; 565 rx_pool->next_free = 0; 566 } 567 568 return 0; 569 } 570 571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 572 struct ibmvnic_tx_pool *tx_pool) 573 { 574 int rc, i; 575 576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 577 if (rc) 578 return rc; 579 580 memset(tx_pool->tx_buff, 0, 581 tx_pool->num_buffers * 582 sizeof(struct ibmvnic_tx_buff)); 583 584 for (i = 0; i < tx_pool->num_buffers; i++) 585 tx_pool->free_map[i] = i; 586 587 tx_pool->consumer_index = 0; 588 tx_pool->producer_index = 0; 589 590 return 0; 591 } 592 593 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 594 { 595 int tx_scrqs; 596 int i, rc; 597 598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 599 for (i = 0; i < tx_scrqs; i++) { 600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 601 if (rc) 602 return rc; 603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 604 if (rc) 605 return rc; 606 } 607 608 return 0; 609 } 610 611 static void release_vpd_data(struct ibmvnic_adapter *adapter) 612 { 613 if (!adapter->vpd) 614 return; 615 616 kfree(adapter->vpd->buff); 617 kfree(adapter->vpd); 618 619 adapter->vpd = NULL; 620 } 621 622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 623 struct ibmvnic_tx_pool *tx_pool) 624 { 625 kfree(tx_pool->tx_buff); 626 kfree(tx_pool->free_map); 627 free_long_term_buff(adapter, &tx_pool->long_term_buff); 628 } 629 630 static void release_tx_pools(struct ibmvnic_adapter *adapter) 631 { 632 int i; 633 634 if (!adapter->tx_pool) 635 return; 636 637 for (i = 0; i < adapter->num_active_tx_pools; i++) { 638 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 639 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 640 } 641 642 kfree(adapter->tx_pool); 643 adapter->tx_pool = NULL; 644 kfree(adapter->tso_pool); 645 adapter->tso_pool = NULL; 646 adapter->num_active_tx_pools = 0; 647 } 648 649 static int init_one_tx_pool(struct net_device *netdev, 650 struct ibmvnic_tx_pool *tx_pool, 651 int num_entries, int buf_size) 652 { 653 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 654 int i; 655 656 tx_pool->tx_buff = kcalloc(num_entries, 657 sizeof(struct ibmvnic_tx_buff), 658 GFP_KERNEL); 659 if (!tx_pool->tx_buff) 660 return -1; 661 662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 663 num_entries * buf_size)) 664 return -1; 665 666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 667 if (!tx_pool->free_map) 668 return -1; 669 670 for (i = 0; i < num_entries; i++) 671 tx_pool->free_map[i] = i; 672 673 tx_pool->consumer_index = 0; 674 tx_pool->producer_index = 0; 675 tx_pool->num_buffers = num_entries; 676 tx_pool->buf_size = buf_size; 677 678 return 0; 679 } 680 681 static int init_tx_pools(struct net_device *netdev) 682 { 683 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 684 int tx_subcrqs; 685 int i, rc; 686 687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 688 adapter->tx_pool = kcalloc(tx_subcrqs, 689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 690 if (!adapter->tx_pool) 691 return -1; 692 693 adapter->tso_pool = kcalloc(tx_subcrqs, 694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 695 if (!adapter->tso_pool) 696 return -1; 697 698 adapter->num_active_tx_pools = tx_subcrqs; 699 700 for (i = 0; i < tx_subcrqs; i++) { 701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 702 adapter->req_tx_entries_per_subcrq, 703 adapter->req_mtu + VLAN_HLEN); 704 if (rc) { 705 release_tx_pools(adapter); 706 return rc; 707 } 708 709 init_one_tx_pool(netdev, &adapter->tso_pool[i], 710 IBMVNIC_TSO_BUFS, 711 IBMVNIC_TSO_BUF_SZ); 712 if (rc) { 713 release_tx_pools(adapter); 714 return rc; 715 } 716 } 717 718 return 0; 719 } 720 721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 722 { 723 int i; 724 725 if (adapter->napi_enabled) 726 return; 727 728 for (i = 0; i < adapter->req_rx_queues; i++) 729 napi_enable(&adapter->napi[i]); 730 731 adapter->napi_enabled = true; 732 } 733 734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 735 { 736 int i; 737 738 if (!adapter->napi_enabled) 739 return; 740 741 for (i = 0; i < adapter->req_rx_queues; i++) { 742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 743 napi_disable(&adapter->napi[i]); 744 } 745 746 adapter->napi_enabled = false; 747 } 748 749 static int init_napi(struct ibmvnic_adapter *adapter) 750 { 751 int i; 752 753 adapter->napi = kcalloc(adapter->req_rx_queues, 754 sizeof(struct napi_struct), GFP_KERNEL); 755 if (!adapter->napi) 756 return -ENOMEM; 757 758 for (i = 0; i < adapter->req_rx_queues; i++) { 759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 760 netif_napi_add(adapter->netdev, &adapter->napi[i], 761 ibmvnic_poll, NAPI_POLL_WEIGHT); 762 } 763 764 adapter->num_active_rx_napi = adapter->req_rx_queues; 765 return 0; 766 } 767 768 static void release_napi(struct ibmvnic_adapter *adapter) 769 { 770 int i; 771 772 if (!adapter->napi) 773 return; 774 775 for (i = 0; i < adapter->num_active_rx_napi; i++) { 776 if (&adapter->napi[i]) { 777 netdev_dbg(adapter->netdev, 778 "Releasing napi[%d]\n", i); 779 netif_napi_del(&adapter->napi[i]); 780 } 781 } 782 783 kfree(adapter->napi); 784 adapter->napi = NULL; 785 adapter->num_active_rx_napi = 0; 786 adapter->napi_enabled = false; 787 } 788 789 static int ibmvnic_login(struct net_device *netdev) 790 { 791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 792 unsigned long timeout = msecs_to_jiffies(30000); 793 int retry_count = 0; 794 bool retry; 795 int rc; 796 797 do { 798 retry = false; 799 if (retry_count > IBMVNIC_MAX_QUEUES) { 800 netdev_warn(netdev, "Login attempts exceeded\n"); 801 return -1; 802 } 803 804 adapter->init_done_rc = 0; 805 reinit_completion(&adapter->init_done); 806 rc = send_login(adapter); 807 if (rc) { 808 netdev_warn(netdev, "Unable to login\n"); 809 return rc; 810 } 811 812 if (!wait_for_completion_timeout(&adapter->init_done, 813 timeout)) { 814 netdev_warn(netdev, "Login timed out\n"); 815 return -1; 816 } 817 818 if (adapter->init_done_rc == PARTIALSUCCESS) { 819 retry_count++; 820 release_sub_crqs(adapter, 1); 821 822 retry = true; 823 netdev_dbg(netdev, 824 "Received partial success, retrying...\n"); 825 adapter->init_done_rc = 0; 826 reinit_completion(&adapter->init_done); 827 send_cap_queries(adapter); 828 if (!wait_for_completion_timeout(&adapter->init_done, 829 timeout)) { 830 netdev_warn(netdev, 831 "Capabilities query timed out\n"); 832 return -1; 833 } 834 835 rc = init_sub_crqs(adapter); 836 if (rc) { 837 netdev_warn(netdev, 838 "SCRQ initialization failed\n"); 839 return -1; 840 } 841 842 rc = init_sub_crq_irqs(adapter); 843 if (rc) { 844 netdev_warn(netdev, 845 "SCRQ irq initialization failed\n"); 846 return -1; 847 } 848 } else if (adapter->init_done_rc) { 849 netdev_warn(netdev, "Adapter login failed\n"); 850 return -1; 851 } 852 } while (retry); 853 854 /* handle pending MAC address changes after successful login */ 855 if (adapter->mac_change_pending) { 856 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 857 adapter->mac_change_pending = false; 858 } 859 860 return 0; 861 } 862 863 static void release_login_buffer(struct ibmvnic_adapter *adapter) 864 { 865 kfree(adapter->login_buf); 866 adapter->login_buf = NULL; 867 } 868 869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 870 { 871 kfree(adapter->login_rsp_buf); 872 adapter->login_rsp_buf = NULL; 873 } 874 875 static void release_resources(struct ibmvnic_adapter *adapter) 876 { 877 release_vpd_data(adapter); 878 879 release_tx_pools(adapter); 880 release_rx_pools(adapter); 881 882 release_napi(adapter); 883 release_login_rsp_buffer(adapter); 884 } 885 886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 887 { 888 struct net_device *netdev = adapter->netdev; 889 unsigned long timeout = msecs_to_jiffies(30000); 890 union ibmvnic_crq crq; 891 bool resend; 892 int rc; 893 894 netdev_dbg(netdev, "setting link state %d\n", link_state); 895 896 memset(&crq, 0, sizeof(crq)); 897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 899 crq.logical_link_state.link_state = link_state; 900 901 do { 902 resend = false; 903 904 reinit_completion(&adapter->init_done); 905 rc = ibmvnic_send_crq(adapter, &crq); 906 if (rc) { 907 netdev_err(netdev, "Failed to set link state\n"); 908 return rc; 909 } 910 911 if (!wait_for_completion_timeout(&adapter->init_done, 912 timeout)) { 913 netdev_err(netdev, "timeout setting link state\n"); 914 return -1; 915 } 916 917 if (adapter->init_done_rc == 1) { 918 /* Partuial success, delay and re-send */ 919 mdelay(1000); 920 resend = true; 921 } else if (adapter->init_done_rc) { 922 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 923 adapter->init_done_rc); 924 return adapter->init_done_rc; 925 } 926 } while (resend); 927 928 return 0; 929 } 930 931 static int set_real_num_queues(struct net_device *netdev) 932 { 933 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 934 int rc; 935 936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 937 adapter->req_tx_queues, adapter->req_rx_queues); 938 939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 940 if (rc) { 941 netdev_err(netdev, "failed to set the number of tx queues\n"); 942 return rc; 943 } 944 945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 946 if (rc) 947 netdev_err(netdev, "failed to set the number of rx queues\n"); 948 949 return rc; 950 } 951 952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 953 { 954 struct device *dev = &adapter->vdev->dev; 955 union ibmvnic_crq crq; 956 int len = 0; 957 int rc; 958 959 if (adapter->vpd->buff) 960 len = adapter->vpd->len; 961 962 init_completion(&adapter->fw_done); 963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 964 crq.get_vpd_size.cmd = GET_VPD_SIZE; 965 rc = ibmvnic_send_crq(adapter, &crq); 966 if (rc) 967 return rc; 968 wait_for_completion(&adapter->fw_done); 969 970 if (!adapter->vpd->len) 971 return -ENODATA; 972 973 if (!adapter->vpd->buff) 974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 975 else if (adapter->vpd->len != len) 976 adapter->vpd->buff = 977 krealloc(adapter->vpd->buff, 978 adapter->vpd->len, GFP_KERNEL); 979 980 if (!adapter->vpd->buff) { 981 dev_err(dev, "Could allocate VPD buffer\n"); 982 return -ENOMEM; 983 } 984 985 adapter->vpd->dma_addr = 986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 987 DMA_FROM_DEVICE); 988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 989 dev_err(dev, "Could not map VPD buffer\n"); 990 kfree(adapter->vpd->buff); 991 adapter->vpd->buff = NULL; 992 return -ENOMEM; 993 } 994 995 reinit_completion(&adapter->fw_done); 996 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 997 crq.get_vpd.cmd = GET_VPD; 998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1000 rc = ibmvnic_send_crq(adapter, &crq); 1001 if (rc) { 1002 kfree(adapter->vpd->buff); 1003 adapter->vpd->buff = NULL; 1004 return rc; 1005 } 1006 wait_for_completion(&adapter->fw_done); 1007 1008 return 0; 1009 } 1010 1011 static int init_resources(struct ibmvnic_adapter *adapter) 1012 { 1013 struct net_device *netdev = adapter->netdev; 1014 int rc; 1015 1016 rc = set_real_num_queues(netdev); 1017 if (rc) 1018 return rc; 1019 1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1021 if (!adapter->vpd) 1022 return -ENOMEM; 1023 1024 /* Vital Product Data (VPD) */ 1025 rc = ibmvnic_get_vpd(adapter); 1026 if (rc) { 1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1028 return rc; 1029 } 1030 1031 adapter->map_id = 1; 1032 1033 rc = init_napi(adapter); 1034 if (rc) 1035 return rc; 1036 1037 send_map_query(adapter); 1038 1039 rc = init_rx_pools(netdev); 1040 if (rc) 1041 return rc; 1042 1043 rc = init_tx_pools(netdev); 1044 return rc; 1045 } 1046 1047 static int __ibmvnic_open(struct net_device *netdev) 1048 { 1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1050 enum vnic_state prev_state = adapter->state; 1051 int i, rc; 1052 1053 adapter->state = VNIC_OPENING; 1054 replenish_pools(adapter); 1055 ibmvnic_napi_enable(adapter); 1056 1057 /* We're ready to receive frames, enable the sub-crq interrupts and 1058 * set the logical link state to up 1059 */ 1060 for (i = 0; i < adapter->req_rx_queues; i++) { 1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1062 if (prev_state == VNIC_CLOSED) 1063 enable_irq(adapter->rx_scrq[i]->irq); 1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1065 } 1066 1067 for (i = 0; i < adapter->req_tx_queues; i++) { 1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1069 if (prev_state == VNIC_CLOSED) 1070 enable_irq(adapter->tx_scrq[i]->irq); 1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1072 } 1073 1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1075 if (rc) { 1076 for (i = 0; i < adapter->req_rx_queues; i++) 1077 napi_disable(&adapter->napi[i]); 1078 release_resources(adapter); 1079 return rc; 1080 } 1081 1082 netif_tx_start_all_queues(netdev); 1083 1084 if (prev_state == VNIC_CLOSED) { 1085 for (i = 0; i < adapter->req_rx_queues; i++) 1086 napi_schedule(&adapter->napi[i]); 1087 } 1088 1089 adapter->state = VNIC_OPEN; 1090 return rc; 1091 } 1092 1093 static int ibmvnic_open(struct net_device *netdev) 1094 { 1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1096 int rc; 1097 1098 /* If device failover is pending, just set device state and return. 1099 * Device operation will be handled by reset routine. 1100 */ 1101 if (adapter->failover_pending) { 1102 adapter->state = VNIC_OPEN; 1103 return 0; 1104 } 1105 1106 if (adapter->state != VNIC_CLOSED) { 1107 rc = ibmvnic_login(netdev); 1108 if (rc) 1109 return rc; 1110 1111 rc = init_resources(adapter); 1112 if (rc) { 1113 netdev_err(netdev, "failed to initialize resources\n"); 1114 release_resources(adapter); 1115 return rc; 1116 } 1117 } 1118 1119 rc = __ibmvnic_open(netdev); 1120 netif_carrier_on(netdev); 1121 1122 return rc; 1123 } 1124 1125 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1126 { 1127 struct ibmvnic_rx_pool *rx_pool; 1128 struct ibmvnic_rx_buff *rx_buff; 1129 u64 rx_entries; 1130 int rx_scrqs; 1131 int i, j; 1132 1133 if (!adapter->rx_pool) 1134 return; 1135 1136 rx_scrqs = adapter->num_active_rx_pools; 1137 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1138 1139 /* Free any remaining skbs in the rx buffer pools */ 1140 for (i = 0; i < rx_scrqs; i++) { 1141 rx_pool = &adapter->rx_pool[i]; 1142 if (!rx_pool || !rx_pool->rx_buff) 1143 continue; 1144 1145 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1146 for (j = 0; j < rx_entries; j++) { 1147 rx_buff = &rx_pool->rx_buff[j]; 1148 if (rx_buff && rx_buff->skb) { 1149 dev_kfree_skb_any(rx_buff->skb); 1150 rx_buff->skb = NULL; 1151 } 1152 } 1153 } 1154 } 1155 1156 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1157 struct ibmvnic_tx_pool *tx_pool) 1158 { 1159 struct ibmvnic_tx_buff *tx_buff; 1160 u64 tx_entries; 1161 int i; 1162 1163 if (!tx_pool || !tx_pool->tx_buff) 1164 return; 1165 1166 tx_entries = tx_pool->num_buffers; 1167 1168 for (i = 0; i < tx_entries; i++) { 1169 tx_buff = &tx_pool->tx_buff[i]; 1170 if (tx_buff && tx_buff->skb) { 1171 dev_kfree_skb_any(tx_buff->skb); 1172 tx_buff->skb = NULL; 1173 } 1174 } 1175 } 1176 1177 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1178 { 1179 int tx_scrqs; 1180 int i; 1181 1182 if (!adapter->tx_pool || !adapter->tso_pool) 1183 return; 1184 1185 tx_scrqs = adapter->num_active_tx_pools; 1186 1187 /* Free any remaining skbs in the tx buffer pools */ 1188 for (i = 0; i < tx_scrqs; i++) { 1189 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1190 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1191 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1192 } 1193 } 1194 1195 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1196 { 1197 struct net_device *netdev = adapter->netdev; 1198 int i; 1199 1200 if (adapter->tx_scrq) { 1201 for (i = 0; i < adapter->req_tx_queues; i++) 1202 if (adapter->tx_scrq[i]->irq) { 1203 netdev_dbg(netdev, 1204 "Disabling tx_scrq[%d] irq\n", i); 1205 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1206 disable_irq(adapter->tx_scrq[i]->irq); 1207 } 1208 } 1209 1210 if (adapter->rx_scrq) { 1211 for (i = 0; i < adapter->req_rx_queues; i++) { 1212 if (adapter->rx_scrq[i]->irq) { 1213 netdev_dbg(netdev, 1214 "Disabling rx_scrq[%d] irq\n", i); 1215 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1216 disable_irq(adapter->rx_scrq[i]->irq); 1217 } 1218 } 1219 } 1220 } 1221 1222 static void ibmvnic_cleanup(struct net_device *netdev) 1223 { 1224 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1225 1226 /* ensure that transmissions are stopped if called by do_reset */ 1227 if (adapter->resetting) 1228 netif_tx_disable(netdev); 1229 else 1230 netif_tx_stop_all_queues(netdev); 1231 1232 ibmvnic_napi_disable(adapter); 1233 ibmvnic_disable_irqs(adapter); 1234 1235 clean_rx_pools(adapter); 1236 clean_tx_pools(adapter); 1237 } 1238 1239 static int __ibmvnic_close(struct net_device *netdev) 1240 { 1241 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1242 int rc = 0; 1243 1244 adapter->state = VNIC_CLOSING; 1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1246 if (rc) 1247 return rc; 1248 adapter->state = VNIC_CLOSED; 1249 return 0; 1250 } 1251 1252 static int ibmvnic_close(struct net_device *netdev) 1253 { 1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1255 int rc; 1256 1257 /* If device failover is pending, just set device state and return. 1258 * Device operation will be handled by reset routine. 1259 */ 1260 if (adapter->failover_pending) { 1261 adapter->state = VNIC_CLOSED; 1262 return 0; 1263 } 1264 1265 rc = __ibmvnic_close(netdev); 1266 ibmvnic_cleanup(netdev); 1267 1268 return rc; 1269 } 1270 1271 /** 1272 * build_hdr_data - creates L2/L3/L4 header data buffer 1273 * @hdr_field - bitfield determining needed headers 1274 * @skb - socket buffer 1275 * @hdr_len - array of header lengths 1276 * @tot_len - total length of data 1277 * 1278 * Reads hdr_field to determine which headers are needed by firmware. 1279 * Builds a buffer containing these headers. Saves individual header 1280 * lengths and total buffer length to be used to build descriptors. 1281 */ 1282 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1283 int *hdr_len, u8 *hdr_data) 1284 { 1285 int len = 0; 1286 u8 *hdr; 1287 1288 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1289 hdr_len[0] = sizeof(struct vlan_ethhdr); 1290 else 1291 hdr_len[0] = sizeof(struct ethhdr); 1292 1293 if (skb->protocol == htons(ETH_P_IP)) { 1294 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1295 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1296 hdr_len[2] = tcp_hdrlen(skb); 1297 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1298 hdr_len[2] = sizeof(struct udphdr); 1299 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1300 hdr_len[1] = sizeof(struct ipv6hdr); 1301 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1302 hdr_len[2] = tcp_hdrlen(skb); 1303 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1304 hdr_len[2] = sizeof(struct udphdr); 1305 } else if (skb->protocol == htons(ETH_P_ARP)) { 1306 hdr_len[1] = arp_hdr_len(skb->dev); 1307 hdr_len[2] = 0; 1308 } 1309 1310 memset(hdr_data, 0, 120); 1311 if ((hdr_field >> 6) & 1) { 1312 hdr = skb_mac_header(skb); 1313 memcpy(hdr_data, hdr, hdr_len[0]); 1314 len += hdr_len[0]; 1315 } 1316 1317 if ((hdr_field >> 5) & 1) { 1318 hdr = skb_network_header(skb); 1319 memcpy(hdr_data + len, hdr, hdr_len[1]); 1320 len += hdr_len[1]; 1321 } 1322 1323 if ((hdr_field >> 4) & 1) { 1324 hdr = skb_transport_header(skb); 1325 memcpy(hdr_data + len, hdr, hdr_len[2]); 1326 len += hdr_len[2]; 1327 } 1328 return len; 1329 } 1330 1331 /** 1332 * create_hdr_descs - create header and header extension descriptors 1333 * @hdr_field - bitfield determining needed headers 1334 * @data - buffer containing header data 1335 * @len - length of data buffer 1336 * @hdr_len - array of individual header lengths 1337 * @scrq_arr - descriptor array 1338 * 1339 * Creates header and, if needed, header extension descriptors and 1340 * places them in a descriptor array, scrq_arr 1341 */ 1342 1343 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1344 union sub_crq *scrq_arr) 1345 { 1346 union sub_crq hdr_desc; 1347 int tmp_len = len; 1348 int num_descs = 0; 1349 u8 *data, *cur; 1350 int tmp; 1351 1352 while (tmp_len > 0) { 1353 cur = hdr_data + len - tmp_len; 1354 1355 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1356 if (cur != hdr_data) { 1357 data = hdr_desc.hdr_ext.data; 1358 tmp = tmp_len > 29 ? 29 : tmp_len; 1359 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1360 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1361 hdr_desc.hdr_ext.len = tmp; 1362 } else { 1363 data = hdr_desc.hdr.data; 1364 tmp = tmp_len > 24 ? 24 : tmp_len; 1365 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1366 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1367 hdr_desc.hdr.len = tmp; 1368 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1369 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1370 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1371 hdr_desc.hdr.flag = hdr_field << 1; 1372 } 1373 memcpy(data, cur, tmp); 1374 tmp_len -= tmp; 1375 *scrq_arr = hdr_desc; 1376 scrq_arr++; 1377 num_descs++; 1378 } 1379 1380 return num_descs; 1381 } 1382 1383 /** 1384 * build_hdr_descs_arr - build a header descriptor array 1385 * @skb - socket buffer 1386 * @num_entries - number of descriptors to be sent 1387 * @subcrq - first TX descriptor 1388 * @hdr_field - bit field determining which headers will be sent 1389 * 1390 * This function will build a TX descriptor array with applicable 1391 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1392 */ 1393 1394 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1395 int *num_entries, u8 hdr_field) 1396 { 1397 int hdr_len[3] = {0, 0, 0}; 1398 int tot_len; 1399 u8 *hdr_data = txbuff->hdr_data; 1400 1401 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1402 txbuff->hdr_data); 1403 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1404 txbuff->indir_arr + 1); 1405 } 1406 1407 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1408 struct net_device *netdev) 1409 { 1410 /* For some backing devices, mishandling of small packets 1411 * can result in a loss of connection or TX stall. Device 1412 * architects recommend that no packet should be smaller 1413 * than the minimum MTU value provided to the driver, so 1414 * pad any packets to that length 1415 */ 1416 if (skb->len < netdev->min_mtu) 1417 return skb_put_padto(skb, netdev->min_mtu); 1418 1419 return 0; 1420 } 1421 1422 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1423 { 1424 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1425 int queue_num = skb_get_queue_mapping(skb); 1426 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1427 struct device *dev = &adapter->vdev->dev; 1428 struct ibmvnic_tx_buff *tx_buff = NULL; 1429 struct ibmvnic_sub_crq_queue *tx_scrq; 1430 struct ibmvnic_tx_pool *tx_pool; 1431 unsigned int tx_send_failed = 0; 1432 unsigned int tx_map_failed = 0; 1433 unsigned int tx_dropped = 0; 1434 unsigned int tx_packets = 0; 1435 unsigned int tx_bytes = 0; 1436 dma_addr_t data_dma_addr; 1437 struct netdev_queue *txq; 1438 unsigned long lpar_rc; 1439 union sub_crq tx_crq; 1440 unsigned int offset; 1441 int num_entries = 1; 1442 unsigned char *dst; 1443 u64 *handle_array; 1444 int index = 0; 1445 u8 proto = 0; 1446 netdev_tx_t ret = NETDEV_TX_OK; 1447 1448 if (adapter->resetting) { 1449 if (!netif_subqueue_stopped(netdev, skb)) 1450 netif_stop_subqueue(netdev, queue_num); 1451 dev_kfree_skb_any(skb); 1452 1453 tx_send_failed++; 1454 tx_dropped++; 1455 ret = NETDEV_TX_OK; 1456 goto out; 1457 } 1458 1459 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1460 tx_dropped++; 1461 tx_send_failed++; 1462 ret = NETDEV_TX_OK; 1463 goto out; 1464 } 1465 if (skb_is_gso(skb)) 1466 tx_pool = &adapter->tso_pool[queue_num]; 1467 else 1468 tx_pool = &adapter->tx_pool[queue_num]; 1469 1470 tx_scrq = adapter->tx_scrq[queue_num]; 1471 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1472 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1473 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1474 1475 index = tx_pool->free_map[tx_pool->consumer_index]; 1476 1477 if (index == IBMVNIC_INVALID_MAP) { 1478 dev_kfree_skb_any(skb); 1479 tx_send_failed++; 1480 tx_dropped++; 1481 ret = NETDEV_TX_OK; 1482 goto out; 1483 } 1484 1485 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1486 1487 offset = index * tx_pool->buf_size; 1488 dst = tx_pool->long_term_buff.buff + offset; 1489 memset(dst, 0, tx_pool->buf_size); 1490 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1491 1492 if (skb_shinfo(skb)->nr_frags) { 1493 int cur, i; 1494 1495 /* Copy the head */ 1496 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1497 cur = skb_headlen(skb); 1498 1499 /* Copy the frags */ 1500 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1501 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1502 1503 memcpy(dst + cur, 1504 page_address(skb_frag_page(frag)) + 1505 frag->page_offset, skb_frag_size(frag)); 1506 cur += skb_frag_size(frag); 1507 } 1508 } else { 1509 skb_copy_from_linear_data(skb, dst, skb->len); 1510 } 1511 1512 tx_pool->consumer_index = 1513 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1514 1515 tx_buff = &tx_pool->tx_buff[index]; 1516 tx_buff->skb = skb; 1517 tx_buff->data_dma[0] = data_dma_addr; 1518 tx_buff->data_len[0] = skb->len; 1519 tx_buff->index = index; 1520 tx_buff->pool_index = queue_num; 1521 tx_buff->last_frag = true; 1522 1523 memset(&tx_crq, 0, sizeof(tx_crq)); 1524 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1525 tx_crq.v1.type = IBMVNIC_TX_DESC; 1526 tx_crq.v1.n_crq_elem = 1; 1527 tx_crq.v1.n_sge = 1; 1528 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1529 1530 if (skb_is_gso(skb)) 1531 tx_crq.v1.correlator = 1532 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1533 else 1534 tx_crq.v1.correlator = cpu_to_be32(index); 1535 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1536 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1537 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1538 1539 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1540 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1541 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1542 } 1543 1544 if (skb->protocol == htons(ETH_P_IP)) { 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1546 proto = ip_hdr(skb)->protocol; 1547 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1549 proto = ipv6_hdr(skb)->nexthdr; 1550 } 1551 1552 if (proto == IPPROTO_TCP) 1553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1554 else if (proto == IPPROTO_UDP) 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1556 1557 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1558 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1559 hdrs += 2; 1560 } 1561 if (skb_is_gso(skb)) { 1562 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1563 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1564 hdrs += 2; 1565 } 1566 /* determine if l2/3/4 headers are sent to firmware */ 1567 if ((*hdrs >> 7) & 1) { 1568 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1569 tx_crq.v1.n_crq_elem = num_entries; 1570 tx_buff->num_entries = num_entries; 1571 tx_buff->indir_arr[0] = tx_crq; 1572 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1573 sizeof(tx_buff->indir_arr), 1574 DMA_TO_DEVICE); 1575 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1576 dev_kfree_skb_any(skb); 1577 tx_buff->skb = NULL; 1578 if (!firmware_has_feature(FW_FEATURE_CMO)) 1579 dev_err(dev, "tx: unable to map descriptor array\n"); 1580 tx_map_failed++; 1581 tx_dropped++; 1582 ret = NETDEV_TX_OK; 1583 goto tx_err_out; 1584 } 1585 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1586 (u64)tx_buff->indir_dma, 1587 (u64)num_entries); 1588 } else { 1589 tx_buff->num_entries = num_entries; 1590 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1591 &tx_crq); 1592 } 1593 if (lpar_rc != H_SUCCESS) { 1594 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1595 dev_err_ratelimited(dev, "tx: send failed\n"); 1596 dev_kfree_skb_any(skb); 1597 tx_buff->skb = NULL; 1598 1599 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1600 /* Disable TX and report carrier off if queue is closed 1601 * or pending failover. 1602 * Firmware guarantees that a signal will be sent to the 1603 * driver, triggering a reset or some other action. 1604 */ 1605 netif_tx_stop_all_queues(netdev); 1606 netif_carrier_off(netdev); 1607 } 1608 1609 tx_send_failed++; 1610 tx_dropped++; 1611 ret = NETDEV_TX_OK; 1612 goto tx_err_out; 1613 } 1614 1615 if (atomic_add_return(num_entries, &tx_scrq->used) 1616 >= adapter->req_tx_entries_per_subcrq) { 1617 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1618 netif_stop_subqueue(netdev, queue_num); 1619 } 1620 1621 tx_packets++; 1622 tx_bytes += skb->len; 1623 txq->trans_start = jiffies; 1624 ret = NETDEV_TX_OK; 1625 goto out; 1626 1627 tx_err_out: 1628 /* roll back consumer index and map array*/ 1629 if (tx_pool->consumer_index == 0) 1630 tx_pool->consumer_index = 1631 tx_pool->num_buffers - 1; 1632 else 1633 tx_pool->consumer_index--; 1634 tx_pool->free_map[tx_pool->consumer_index] = index; 1635 out: 1636 netdev->stats.tx_dropped += tx_dropped; 1637 netdev->stats.tx_bytes += tx_bytes; 1638 netdev->stats.tx_packets += tx_packets; 1639 adapter->tx_send_failed += tx_send_failed; 1640 adapter->tx_map_failed += tx_map_failed; 1641 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1642 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1643 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1644 1645 return ret; 1646 } 1647 1648 static void ibmvnic_set_multi(struct net_device *netdev) 1649 { 1650 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1651 struct netdev_hw_addr *ha; 1652 union ibmvnic_crq crq; 1653 1654 memset(&crq, 0, sizeof(crq)); 1655 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1656 crq.request_capability.cmd = REQUEST_CAPABILITY; 1657 1658 if (netdev->flags & IFF_PROMISC) { 1659 if (!adapter->promisc_supported) 1660 return; 1661 } else { 1662 if (netdev->flags & IFF_ALLMULTI) { 1663 /* Accept all multicast */ 1664 memset(&crq, 0, sizeof(crq)); 1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1668 ibmvnic_send_crq(adapter, &crq); 1669 } else if (netdev_mc_empty(netdev)) { 1670 /* Reject all multicast */ 1671 memset(&crq, 0, sizeof(crq)); 1672 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1673 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1674 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1675 ibmvnic_send_crq(adapter, &crq); 1676 } else { 1677 /* Accept one or more multicast(s) */ 1678 netdev_for_each_mc_addr(ha, netdev) { 1679 memset(&crq, 0, sizeof(crq)); 1680 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1681 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1682 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1683 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1684 ha->addr); 1685 ibmvnic_send_crq(adapter, &crq); 1686 } 1687 } 1688 } 1689 } 1690 1691 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1692 { 1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1694 struct sockaddr *addr = p; 1695 union ibmvnic_crq crq; 1696 int rc; 1697 1698 if (!is_valid_ether_addr(addr->sa_data)) 1699 return -EADDRNOTAVAIL; 1700 1701 memset(&crq, 0, sizeof(crq)); 1702 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1703 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1704 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1705 1706 init_completion(&adapter->fw_done); 1707 rc = ibmvnic_send_crq(adapter, &crq); 1708 if (rc) 1709 return rc; 1710 wait_for_completion(&adapter->fw_done); 1711 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1712 return adapter->fw_done_rc ? -EIO : 0; 1713 } 1714 1715 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1716 { 1717 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1718 struct sockaddr *addr = p; 1719 int rc; 1720 1721 if (adapter->state == VNIC_PROBED) { 1722 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1723 adapter->mac_change_pending = true; 1724 return 0; 1725 } 1726 1727 rc = __ibmvnic_set_mac(netdev, addr); 1728 1729 return rc; 1730 } 1731 1732 /** 1733 * do_reset returns zero if we are able to keep processing reset events, or 1734 * non-zero if we hit a fatal error and must halt. 1735 */ 1736 static int do_reset(struct ibmvnic_adapter *adapter, 1737 struct ibmvnic_rwi *rwi, u32 reset_state) 1738 { 1739 u64 old_num_rx_queues, old_num_tx_queues; 1740 u64 old_num_rx_slots, old_num_tx_slots; 1741 struct net_device *netdev = adapter->netdev; 1742 int i, rc; 1743 1744 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1745 rwi->reset_reason); 1746 1747 netif_carrier_off(netdev); 1748 adapter->reset_reason = rwi->reset_reason; 1749 1750 old_num_rx_queues = adapter->req_rx_queues; 1751 old_num_tx_queues = adapter->req_tx_queues; 1752 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1753 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1754 1755 ibmvnic_cleanup(netdev); 1756 1757 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1758 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1759 rc = __ibmvnic_close(netdev); 1760 if (rc) 1761 return rc; 1762 } 1763 1764 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1765 adapter->wait_for_reset) { 1766 release_resources(adapter); 1767 release_sub_crqs(adapter, 1); 1768 release_crq_queue(adapter); 1769 } 1770 1771 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1772 /* remove the closed state so when we call open it appears 1773 * we are coming from the probed state. 1774 */ 1775 adapter->state = VNIC_PROBED; 1776 1777 if (adapter->wait_for_reset) { 1778 rc = init_crq_queue(adapter); 1779 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1780 rc = ibmvnic_reenable_crq_queue(adapter); 1781 release_sub_crqs(adapter, 1); 1782 } else { 1783 rc = ibmvnic_reset_crq(adapter); 1784 if (!rc) 1785 rc = vio_enable_interrupts(adapter->vdev); 1786 } 1787 1788 if (rc) { 1789 netdev_err(adapter->netdev, 1790 "Couldn't initialize crq. rc=%d\n", rc); 1791 return rc; 1792 } 1793 1794 rc = ibmvnic_reset_init(adapter); 1795 if (rc) 1796 return IBMVNIC_INIT_FAILED; 1797 1798 /* If the adapter was in PROBE state prior to the reset, 1799 * exit here. 1800 */ 1801 if (reset_state == VNIC_PROBED) 1802 return 0; 1803 1804 rc = ibmvnic_login(netdev); 1805 if (rc) { 1806 adapter->state = reset_state; 1807 return rc; 1808 } 1809 1810 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1811 adapter->wait_for_reset) { 1812 rc = init_resources(adapter); 1813 if (rc) 1814 return rc; 1815 } else if (adapter->req_rx_queues != old_num_rx_queues || 1816 adapter->req_tx_queues != old_num_tx_queues || 1817 adapter->req_rx_add_entries_per_subcrq != 1818 old_num_rx_slots || 1819 adapter->req_tx_entries_per_subcrq != 1820 old_num_tx_slots) { 1821 release_rx_pools(adapter); 1822 release_tx_pools(adapter); 1823 release_napi(adapter); 1824 release_vpd_data(adapter); 1825 1826 rc = init_resources(adapter); 1827 if (rc) 1828 return rc; 1829 1830 } else { 1831 rc = reset_tx_pools(adapter); 1832 if (rc) 1833 return rc; 1834 1835 rc = reset_rx_pools(adapter); 1836 if (rc) 1837 return rc; 1838 } 1839 ibmvnic_disable_irqs(adapter); 1840 } 1841 adapter->state = VNIC_CLOSED; 1842 1843 if (reset_state == VNIC_CLOSED) 1844 return 0; 1845 1846 rc = __ibmvnic_open(netdev); 1847 if (rc) { 1848 if (list_empty(&adapter->rwi_list)) 1849 adapter->state = VNIC_CLOSED; 1850 else 1851 adapter->state = reset_state; 1852 1853 return 0; 1854 } 1855 1856 /* kick napi */ 1857 for (i = 0; i < adapter->req_rx_queues; i++) 1858 napi_schedule(&adapter->napi[i]); 1859 1860 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1861 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1862 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1863 1864 netif_carrier_on(netdev); 1865 1866 return 0; 1867 } 1868 1869 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1870 struct ibmvnic_rwi *rwi, u32 reset_state) 1871 { 1872 struct net_device *netdev = adapter->netdev; 1873 int rc; 1874 1875 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1876 rwi->reset_reason); 1877 1878 netif_carrier_off(netdev); 1879 adapter->reset_reason = rwi->reset_reason; 1880 1881 ibmvnic_cleanup(netdev); 1882 release_resources(adapter); 1883 release_sub_crqs(adapter, 0); 1884 release_crq_queue(adapter); 1885 1886 /* remove the closed state so when we call open it appears 1887 * we are coming from the probed state. 1888 */ 1889 adapter->state = VNIC_PROBED; 1890 1891 rc = init_crq_queue(adapter); 1892 if (rc) { 1893 netdev_err(adapter->netdev, 1894 "Couldn't initialize crq. rc=%d\n", rc); 1895 return rc; 1896 } 1897 1898 rc = ibmvnic_init(adapter); 1899 if (rc) 1900 return rc; 1901 1902 /* If the adapter was in PROBE state prior to the reset, 1903 * exit here. 1904 */ 1905 if (reset_state == VNIC_PROBED) 1906 return 0; 1907 1908 rc = ibmvnic_login(netdev); 1909 if (rc) { 1910 adapter->state = VNIC_PROBED; 1911 return 0; 1912 } 1913 1914 rc = init_resources(adapter); 1915 if (rc) 1916 return rc; 1917 1918 ibmvnic_disable_irqs(adapter); 1919 adapter->state = VNIC_CLOSED; 1920 1921 if (reset_state == VNIC_CLOSED) 1922 return 0; 1923 1924 rc = __ibmvnic_open(netdev); 1925 if (rc) { 1926 if (list_empty(&adapter->rwi_list)) 1927 adapter->state = VNIC_CLOSED; 1928 else 1929 adapter->state = reset_state; 1930 1931 return 0; 1932 } 1933 1934 netif_carrier_on(netdev); 1935 1936 return 0; 1937 } 1938 1939 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1940 { 1941 struct ibmvnic_rwi *rwi; 1942 1943 mutex_lock(&adapter->rwi_lock); 1944 1945 if (!list_empty(&adapter->rwi_list)) { 1946 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1947 list); 1948 list_del(&rwi->list); 1949 } else { 1950 rwi = NULL; 1951 } 1952 1953 mutex_unlock(&adapter->rwi_lock); 1954 return rwi; 1955 } 1956 1957 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1958 { 1959 struct ibmvnic_rwi *rwi; 1960 1961 rwi = get_next_rwi(adapter); 1962 while (rwi) { 1963 kfree(rwi); 1964 rwi = get_next_rwi(adapter); 1965 } 1966 } 1967 1968 static void __ibmvnic_reset(struct work_struct *work) 1969 { 1970 struct ibmvnic_rwi *rwi; 1971 struct ibmvnic_adapter *adapter; 1972 struct net_device *netdev; 1973 bool we_lock_rtnl = false; 1974 u32 reset_state; 1975 int rc = 0; 1976 1977 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1978 netdev = adapter->netdev; 1979 1980 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1981 * unless wait_for_reset is set, in which case the rtnl lock 1982 * has already been taken before initializing the reset 1983 */ 1984 if (!adapter->wait_for_reset) { 1985 rtnl_lock(); 1986 we_lock_rtnl = true; 1987 } 1988 reset_state = adapter->state; 1989 1990 rwi = get_next_rwi(adapter); 1991 while (rwi) { 1992 if (adapter->force_reset_recovery) { 1993 adapter->force_reset_recovery = false; 1994 rc = do_hard_reset(adapter, rwi, reset_state); 1995 } else { 1996 rc = do_reset(adapter, rwi, reset_state); 1997 } 1998 kfree(rwi); 1999 if (rc && rc != IBMVNIC_INIT_FAILED && 2000 !adapter->force_reset_recovery) 2001 break; 2002 2003 rwi = get_next_rwi(adapter); 2004 } 2005 2006 if (adapter->wait_for_reset) { 2007 adapter->wait_for_reset = false; 2008 adapter->reset_done_rc = rc; 2009 complete(&adapter->reset_done); 2010 } 2011 2012 if (rc) { 2013 netdev_dbg(adapter->netdev, "Reset failed\n"); 2014 free_all_rwi(adapter); 2015 } 2016 2017 adapter->resetting = false; 2018 if (we_lock_rtnl) 2019 rtnl_unlock(); 2020 } 2021 2022 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2023 enum ibmvnic_reset_reason reason) 2024 { 2025 struct list_head *entry, *tmp_entry; 2026 struct ibmvnic_rwi *rwi, *tmp; 2027 struct net_device *netdev = adapter->netdev; 2028 int ret; 2029 2030 if (adapter->state == VNIC_REMOVING || 2031 adapter->state == VNIC_REMOVED || 2032 adapter->failover_pending) { 2033 ret = EBUSY; 2034 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2035 goto err; 2036 } 2037 2038 if (adapter->state == VNIC_PROBING) { 2039 netdev_warn(netdev, "Adapter reset during probe\n"); 2040 ret = adapter->init_done_rc = EAGAIN; 2041 goto err; 2042 } 2043 2044 mutex_lock(&adapter->rwi_lock); 2045 2046 list_for_each(entry, &adapter->rwi_list) { 2047 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2048 if (tmp->reset_reason == reason) { 2049 netdev_dbg(netdev, "Skipping matching reset\n"); 2050 mutex_unlock(&adapter->rwi_lock); 2051 ret = EBUSY; 2052 goto err; 2053 } 2054 } 2055 2056 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 2057 if (!rwi) { 2058 mutex_unlock(&adapter->rwi_lock); 2059 ibmvnic_close(netdev); 2060 ret = ENOMEM; 2061 goto err; 2062 } 2063 /* if we just received a transport event, 2064 * flush reset queue and process this reset 2065 */ 2066 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2067 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2068 list_del(entry); 2069 } 2070 rwi->reset_reason = reason; 2071 list_add_tail(&rwi->list, &adapter->rwi_list); 2072 mutex_unlock(&adapter->rwi_lock); 2073 adapter->resetting = true; 2074 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2075 schedule_work(&adapter->ibmvnic_reset); 2076 2077 return 0; 2078 err: 2079 if (adapter->wait_for_reset) 2080 adapter->wait_for_reset = false; 2081 return -ret; 2082 } 2083 2084 static void ibmvnic_tx_timeout(struct net_device *dev) 2085 { 2086 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2087 2088 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2089 } 2090 2091 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2092 struct ibmvnic_rx_buff *rx_buff) 2093 { 2094 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2095 2096 rx_buff->skb = NULL; 2097 2098 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2099 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2100 2101 atomic_dec(&pool->available); 2102 } 2103 2104 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2105 { 2106 struct net_device *netdev = napi->dev; 2107 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2108 int scrq_num = (int)(napi - adapter->napi); 2109 int frames_processed = 0; 2110 2111 restart_poll: 2112 while (frames_processed < budget) { 2113 struct sk_buff *skb; 2114 struct ibmvnic_rx_buff *rx_buff; 2115 union sub_crq *next; 2116 u32 length; 2117 u16 offset; 2118 u8 flags = 0; 2119 2120 if (unlikely(adapter->resetting && 2121 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2122 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2123 napi_complete_done(napi, frames_processed); 2124 return frames_processed; 2125 } 2126 2127 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2128 break; 2129 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2130 rx_buff = 2131 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2132 rx_comp.correlator); 2133 /* do error checking */ 2134 if (next->rx_comp.rc) { 2135 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2136 be16_to_cpu(next->rx_comp.rc)); 2137 /* free the entry */ 2138 next->rx_comp.first = 0; 2139 dev_kfree_skb_any(rx_buff->skb); 2140 remove_buff_from_pool(adapter, rx_buff); 2141 continue; 2142 } else if (!rx_buff->skb) { 2143 /* free the entry */ 2144 next->rx_comp.first = 0; 2145 remove_buff_from_pool(adapter, rx_buff); 2146 continue; 2147 } 2148 2149 length = be32_to_cpu(next->rx_comp.len); 2150 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2151 flags = next->rx_comp.flags; 2152 skb = rx_buff->skb; 2153 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2154 length); 2155 2156 /* VLAN Header has been stripped by the system firmware and 2157 * needs to be inserted by the driver 2158 */ 2159 if (adapter->rx_vlan_header_insertion && 2160 (flags & IBMVNIC_VLAN_STRIPPED)) 2161 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2162 ntohs(next->rx_comp.vlan_tci)); 2163 2164 /* free the entry */ 2165 next->rx_comp.first = 0; 2166 remove_buff_from_pool(adapter, rx_buff); 2167 2168 skb_put(skb, length); 2169 skb->protocol = eth_type_trans(skb, netdev); 2170 skb_record_rx_queue(skb, scrq_num); 2171 2172 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2173 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2174 skb->ip_summed = CHECKSUM_UNNECESSARY; 2175 } 2176 2177 length = skb->len; 2178 napi_gro_receive(napi, skb); /* send it up */ 2179 netdev->stats.rx_packets++; 2180 netdev->stats.rx_bytes += length; 2181 adapter->rx_stats_buffers[scrq_num].packets++; 2182 adapter->rx_stats_buffers[scrq_num].bytes += length; 2183 frames_processed++; 2184 } 2185 2186 if (adapter->state != VNIC_CLOSING) 2187 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2188 2189 if (frames_processed < budget) { 2190 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2191 napi_complete_done(napi, frames_processed); 2192 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2193 napi_reschedule(napi)) { 2194 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2195 goto restart_poll; 2196 } 2197 } 2198 return frames_processed; 2199 } 2200 2201 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2202 { 2203 int rc, ret; 2204 2205 adapter->fallback.mtu = adapter->req_mtu; 2206 adapter->fallback.rx_queues = adapter->req_rx_queues; 2207 adapter->fallback.tx_queues = adapter->req_tx_queues; 2208 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2209 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2210 2211 init_completion(&adapter->reset_done); 2212 adapter->wait_for_reset = true; 2213 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2214 if (rc) 2215 return rc; 2216 wait_for_completion(&adapter->reset_done); 2217 2218 ret = 0; 2219 if (adapter->reset_done_rc) { 2220 ret = -EIO; 2221 adapter->desired.mtu = adapter->fallback.mtu; 2222 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2223 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2224 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2225 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2226 2227 init_completion(&adapter->reset_done); 2228 adapter->wait_for_reset = true; 2229 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2230 if (rc) 2231 return ret; 2232 wait_for_completion(&adapter->reset_done); 2233 } 2234 adapter->wait_for_reset = false; 2235 2236 return ret; 2237 } 2238 2239 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2240 { 2241 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2242 2243 adapter->desired.mtu = new_mtu + ETH_HLEN; 2244 2245 return wait_for_reset(adapter); 2246 } 2247 2248 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2249 struct net_device *dev, 2250 netdev_features_t features) 2251 { 2252 /* Some backing hardware adapters can not 2253 * handle packets with a MSS less than 224 2254 * or with only one segment. 2255 */ 2256 if (skb_is_gso(skb)) { 2257 if (skb_shinfo(skb)->gso_size < 224 || 2258 skb_shinfo(skb)->gso_segs == 1) 2259 features &= ~NETIF_F_GSO_MASK; 2260 } 2261 2262 return features; 2263 } 2264 2265 static const struct net_device_ops ibmvnic_netdev_ops = { 2266 .ndo_open = ibmvnic_open, 2267 .ndo_stop = ibmvnic_close, 2268 .ndo_start_xmit = ibmvnic_xmit, 2269 .ndo_set_rx_mode = ibmvnic_set_multi, 2270 .ndo_set_mac_address = ibmvnic_set_mac, 2271 .ndo_validate_addr = eth_validate_addr, 2272 .ndo_tx_timeout = ibmvnic_tx_timeout, 2273 .ndo_change_mtu = ibmvnic_change_mtu, 2274 .ndo_features_check = ibmvnic_features_check, 2275 }; 2276 2277 /* ethtool functions */ 2278 2279 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2280 struct ethtool_link_ksettings *cmd) 2281 { 2282 u32 supported, advertising; 2283 2284 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2285 SUPPORTED_FIBRE); 2286 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2287 ADVERTISED_FIBRE); 2288 cmd->base.speed = SPEED_1000; 2289 cmd->base.duplex = DUPLEX_FULL; 2290 cmd->base.port = PORT_FIBRE; 2291 cmd->base.phy_address = 0; 2292 cmd->base.autoneg = AUTONEG_ENABLE; 2293 2294 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2295 supported); 2296 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2297 advertising); 2298 2299 return 0; 2300 } 2301 2302 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2303 struct ethtool_drvinfo *info) 2304 { 2305 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2306 2307 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2308 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2309 strlcpy(info->fw_version, adapter->fw_version, 2310 sizeof(info->fw_version)); 2311 } 2312 2313 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2314 { 2315 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2316 2317 return adapter->msg_enable; 2318 } 2319 2320 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2321 { 2322 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2323 2324 adapter->msg_enable = data; 2325 } 2326 2327 static u32 ibmvnic_get_link(struct net_device *netdev) 2328 { 2329 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2330 2331 /* Don't need to send a query because we request a logical link up at 2332 * init and then we wait for link state indications 2333 */ 2334 return adapter->logical_link_state; 2335 } 2336 2337 static void ibmvnic_get_ringparam(struct net_device *netdev, 2338 struct ethtool_ringparam *ring) 2339 { 2340 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2341 2342 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2343 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2344 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2345 } else { 2346 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2347 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2348 } 2349 ring->rx_mini_max_pending = 0; 2350 ring->rx_jumbo_max_pending = 0; 2351 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2352 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2353 ring->rx_mini_pending = 0; 2354 ring->rx_jumbo_pending = 0; 2355 } 2356 2357 static int ibmvnic_set_ringparam(struct net_device *netdev, 2358 struct ethtool_ringparam *ring) 2359 { 2360 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2361 int ret; 2362 2363 ret = 0; 2364 adapter->desired.rx_entries = ring->rx_pending; 2365 adapter->desired.tx_entries = ring->tx_pending; 2366 2367 ret = wait_for_reset(adapter); 2368 2369 if (!ret && 2370 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2371 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2372 netdev_info(netdev, 2373 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2374 ring->rx_pending, ring->tx_pending, 2375 adapter->req_rx_add_entries_per_subcrq, 2376 adapter->req_tx_entries_per_subcrq); 2377 return ret; 2378 } 2379 2380 static void ibmvnic_get_channels(struct net_device *netdev, 2381 struct ethtool_channels *channels) 2382 { 2383 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2384 2385 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2386 channels->max_rx = adapter->max_rx_queues; 2387 channels->max_tx = adapter->max_tx_queues; 2388 } else { 2389 channels->max_rx = IBMVNIC_MAX_QUEUES; 2390 channels->max_tx = IBMVNIC_MAX_QUEUES; 2391 } 2392 2393 channels->max_other = 0; 2394 channels->max_combined = 0; 2395 channels->rx_count = adapter->req_rx_queues; 2396 channels->tx_count = adapter->req_tx_queues; 2397 channels->other_count = 0; 2398 channels->combined_count = 0; 2399 } 2400 2401 static int ibmvnic_set_channels(struct net_device *netdev, 2402 struct ethtool_channels *channels) 2403 { 2404 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2405 int ret; 2406 2407 ret = 0; 2408 adapter->desired.rx_queues = channels->rx_count; 2409 adapter->desired.tx_queues = channels->tx_count; 2410 2411 ret = wait_for_reset(adapter); 2412 2413 if (!ret && 2414 (adapter->req_rx_queues != channels->rx_count || 2415 adapter->req_tx_queues != channels->tx_count)) 2416 netdev_info(netdev, 2417 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2418 channels->rx_count, channels->tx_count, 2419 adapter->req_rx_queues, adapter->req_tx_queues); 2420 return ret; 2421 2422 } 2423 2424 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2425 { 2426 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2427 int i; 2428 2429 switch (stringset) { 2430 case ETH_SS_STATS: 2431 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2432 i++, data += ETH_GSTRING_LEN) 2433 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2434 2435 for (i = 0; i < adapter->req_tx_queues; i++) { 2436 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2437 data += ETH_GSTRING_LEN; 2438 2439 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2440 data += ETH_GSTRING_LEN; 2441 2442 snprintf(data, ETH_GSTRING_LEN, 2443 "tx%d_dropped_packets", i); 2444 data += ETH_GSTRING_LEN; 2445 } 2446 2447 for (i = 0; i < adapter->req_rx_queues; i++) { 2448 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2449 data += ETH_GSTRING_LEN; 2450 2451 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2452 data += ETH_GSTRING_LEN; 2453 2454 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2455 data += ETH_GSTRING_LEN; 2456 } 2457 break; 2458 2459 case ETH_SS_PRIV_FLAGS: 2460 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2461 strcpy(data + i * ETH_GSTRING_LEN, 2462 ibmvnic_priv_flags[i]); 2463 break; 2464 default: 2465 return; 2466 } 2467 } 2468 2469 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2470 { 2471 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2472 2473 switch (sset) { 2474 case ETH_SS_STATS: 2475 return ARRAY_SIZE(ibmvnic_stats) + 2476 adapter->req_tx_queues * NUM_TX_STATS + 2477 adapter->req_rx_queues * NUM_RX_STATS; 2478 case ETH_SS_PRIV_FLAGS: 2479 return ARRAY_SIZE(ibmvnic_priv_flags); 2480 default: 2481 return -EOPNOTSUPP; 2482 } 2483 } 2484 2485 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2486 struct ethtool_stats *stats, u64 *data) 2487 { 2488 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2489 union ibmvnic_crq crq; 2490 int i, j; 2491 int rc; 2492 2493 memset(&crq, 0, sizeof(crq)); 2494 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2495 crq.request_statistics.cmd = REQUEST_STATISTICS; 2496 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2497 crq.request_statistics.len = 2498 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2499 2500 /* Wait for data to be written */ 2501 init_completion(&adapter->stats_done); 2502 rc = ibmvnic_send_crq(adapter, &crq); 2503 if (rc) 2504 return; 2505 wait_for_completion(&adapter->stats_done); 2506 2507 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2508 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2509 ibmvnic_stats[i].offset)); 2510 2511 for (j = 0; j < adapter->req_tx_queues; j++) { 2512 data[i] = adapter->tx_stats_buffers[j].packets; 2513 i++; 2514 data[i] = adapter->tx_stats_buffers[j].bytes; 2515 i++; 2516 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2517 i++; 2518 } 2519 2520 for (j = 0; j < adapter->req_rx_queues; j++) { 2521 data[i] = adapter->rx_stats_buffers[j].packets; 2522 i++; 2523 data[i] = adapter->rx_stats_buffers[j].bytes; 2524 i++; 2525 data[i] = adapter->rx_stats_buffers[j].interrupts; 2526 i++; 2527 } 2528 } 2529 2530 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2531 { 2532 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2533 2534 return adapter->priv_flags; 2535 } 2536 2537 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2538 { 2539 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2540 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2541 2542 if (which_maxes) 2543 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2544 else 2545 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2546 2547 return 0; 2548 } 2549 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2550 .get_drvinfo = ibmvnic_get_drvinfo, 2551 .get_msglevel = ibmvnic_get_msglevel, 2552 .set_msglevel = ibmvnic_set_msglevel, 2553 .get_link = ibmvnic_get_link, 2554 .get_ringparam = ibmvnic_get_ringparam, 2555 .set_ringparam = ibmvnic_set_ringparam, 2556 .get_channels = ibmvnic_get_channels, 2557 .set_channels = ibmvnic_set_channels, 2558 .get_strings = ibmvnic_get_strings, 2559 .get_sset_count = ibmvnic_get_sset_count, 2560 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2561 .get_link_ksettings = ibmvnic_get_link_ksettings, 2562 .get_priv_flags = ibmvnic_get_priv_flags, 2563 .set_priv_flags = ibmvnic_set_priv_flags, 2564 }; 2565 2566 /* Routines for managing CRQs/sCRQs */ 2567 2568 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2569 struct ibmvnic_sub_crq_queue *scrq) 2570 { 2571 int rc; 2572 2573 if (scrq->irq) { 2574 free_irq(scrq->irq, scrq); 2575 irq_dispose_mapping(scrq->irq); 2576 scrq->irq = 0; 2577 } 2578 2579 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2580 atomic_set(&scrq->used, 0); 2581 scrq->cur = 0; 2582 2583 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2584 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2585 return rc; 2586 } 2587 2588 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2589 { 2590 int i, rc; 2591 2592 for (i = 0; i < adapter->req_tx_queues; i++) { 2593 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2594 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2595 if (rc) 2596 return rc; 2597 } 2598 2599 for (i = 0; i < adapter->req_rx_queues; i++) { 2600 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2601 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2602 if (rc) 2603 return rc; 2604 } 2605 2606 return rc; 2607 } 2608 2609 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2610 struct ibmvnic_sub_crq_queue *scrq, 2611 bool do_h_free) 2612 { 2613 struct device *dev = &adapter->vdev->dev; 2614 long rc; 2615 2616 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2617 2618 if (do_h_free) { 2619 /* Close the sub-crqs */ 2620 do { 2621 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2622 adapter->vdev->unit_address, 2623 scrq->crq_num); 2624 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2625 2626 if (rc) { 2627 netdev_err(adapter->netdev, 2628 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2629 scrq->crq_num, rc); 2630 } 2631 } 2632 2633 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2634 DMA_BIDIRECTIONAL); 2635 free_pages((unsigned long)scrq->msgs, 2); 2636 kfree(scrq); 2637 } 2638 2639 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2640 *adapter) 2641 { 2642 struct device *dev = &adapter->vdev->dev; 2643 struct ibmvnic_sub_crq_queue *scrq; 2644 int rc; 2645 2646 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2647 if (!scrq) 2648 return NULL; 2649 2650 scrq->msgs = 2651 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2652 if (!scrq->msgs) { 2653 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2654 goto zero_page_failed; 2655 } 2656 2657 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2658 DMA_BIDIRECTIONAL); 2659 if (dma_mapping_error(dev, scrq->msg_token)) { 2660 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2661 goto map_failed; 2662 } 2663 2664 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2665 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2666 2667 if (rc == H_RESOURCE) 2668 rc = ibmvnic_reset_crq(adapter); 2669 2670 if (rc == H_CLOSED) { 2671 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2672 } else if (rc) { 2673 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2674 goto reg_failed; 2675 } 2676 2677 scrq->adapter = adapter; 2678 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2679 spin_lock_init(&scrq->lock); 2680 2681 netdev_dbg(adapter->netdev, 2682 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2683 scrq->crq_num, scrq->hw_irq, scrq->irq); 2684 2685 return scrq; 2686 2687 reg_failed: 2688 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2689 DMA_BIDIRECTIONAL); 2690 map_failed: 2691 free_pages((unsigned long)scrq->msgs, 2); 2692 zero_page_failed: 2693 kfree(scrq); 2694 2695 return NULL; 2696 } 2697 2698 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2699 { 2700 int i; 2701 2702 if (adapter->tx_scrq) { 2703 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2704 if (!adapter->tx_scrq[i]) 2705 continue; 2706 2707 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2708 i); 2709 if (adapter->tx_scrq[i]->irq) { 2710 free_irq(adapter->tx_scrq[i]->irq, 2711 adapter->tx_scrq[i]); 2712 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2713 adapter->tx_scrq[i]->irq = 0; 2714 } 2715 2716 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2717 do_h_free); 2718 } 2719 2720 kfree(adapter->tx_scrq); 2721 adapter->tx_scrq = NULL; 2722 adapter->num_active_tx_scrqs = 0; 2723 } 2724 2725 if (adapter->rx_scrq) { 2726 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2727 if (!adapter->rx_scrq[i]) 2728 continue; 2729 2730 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2731 i); 2732 if (adapter->rx_scrq[i]->irq) { 2733 free_irq(adapter->rx_scrq[i]->irq, 2734 adapter->rx_scrq[i]); 2735 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2736 adapter->rx_scrq[i]->irq = 0; 2737 } 2738 2739 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2740 do_h_free); 2741 } 2742 2743 kfree(adapter->rx_scrq); 2744 adapter->rx_scrq = NULL; 2745 adapter->num_active_rx_scrqs = 0; 2746 } 2747 } 2748 2749 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2750 struct ibmvnic_sub_crq_queue *scrq) 2751 { 2752 struct device *dev = &adapter->vdev->dev; 2753 unsigned long rc; 2754 2755 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2756 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2757 if (rc) 2758 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2759 scrq->hw_irq, rc); 2760 return rc; 2761 } 2762 2763 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2764 struct ibmvnic_sub_crq_queue *scrq) 2765 { 2766 struct device *dev = &adapter->vdev->dev; 2767 unsigned long rc; 2768 2769 if (scrq->hw_irq > 0x100000000ULL) { 2770 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2771 return 1; 2772 } 2773 2774 if (adapter->resetting && 2775 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2776 u64 val = (0xff000000) | scrq->hw_irq; 2777 2778 rc = plpar_hcall_norets(H_EOI, val); 2779 if (rc) 2780 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2781 val, rc); 2782 } 2783 2784 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2785 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2786 if (rc) 2787 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2788 scrq->hw_irq, rc); 2789 return rc; 2790 } 2791 2792 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2793 struct ibmvnic_sub_crq_queue *scrq) 2794 { 2795 struct device *dev = &adapter->vdev->dev; 2796 struct ibmvnic_tx_pool *tx_pool; 2797 struct ibmvnic_tx_buff *txbuff; 2798 union sub_crq *next; 2799 int index; 2800 int i, j; 2801 u8 *first; 2802 2803 restart_loop: 2804 while (pending_scrq(adapter, scrq)) { 2805 unsigned int pool = scrq->pool_index; 2806 int num_entries = 0; 2807 2808 next = ibmvnic_next_scrq(adapter, scrq); 2809 for (i = 0; i < next->tx_comp.num_comps; i++) { 2810 if (next->tx_comp.rcs[i]) { 2811 dev_err(dev, "tx error %x\n", 2812 next->tx_comp.rcs[i]); 2813 continue; 2814 } 2815 index = be32_to_cpu(next->tx_comp.correlators[i]); 2816 if (index & IBMVNIC_TSO_POOL_MASK) { 2817 tx_pool = &adapter->tso_pool[pool]; 2818 index &= ~IBMVNIC_TSO_POOL_MASK; 2819 } else { 2820 tx_pool = &adapter->tx_pool[pool]; 2821 } 2822 2823 txbuff = &tx_pool->tx_buff[index]; 2824 2825 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2826 if (!txbuff->data_dma[j]) 2827 continue; 2828 2829 txbuff->data_dma[j] = 0; 2830 } 2831 /* if sub_crq was sent indirectly */ 2832 first = &txbuff->indir_arr[0].generic.first; 2833 if (*first == IBMVNIC_CRQ_CMD) { 2834 dma_unmap_single(dev, txbuff->indir_dma, 2835 sizeof(txbuff->indir_arr), 2836 DMA_TO_DEVICE); 2837 *first = 0; 2838 } 2839 2840 if (txbuff->last_frag) { 2841 dev_kfree_skb_any(txbuff->skb); 2842 txbuff->skb = NULL; 2843 } 2844 2845 num_entries += txbuff->num_entries; 2846 2847 tx_pool->free_map[tx_pool->producer_index] = index; 2848 tx_pool->producer_index = 2849 (tx_pool->producer_index + 1) % 2850 tx_pool->num_buffers; 2851 } 2852 /* remove tx_comp scrq*/ 2853 next->tx_comp.first = 0; 2854 2855 if (atomic_sub_return(num_entries, &scrq->used) <= 2856 (adapter->req_tx_entries_per_subcrq / 2) && 2857 __netif_subqueue_stopped(adapter->netdev, 2858 scrq->pool_index)) { 2859 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2860 netdev_dbg(adapter->netdev, "Started queue %d\n", 2861 scrq->pool_index); 2862 } 2863 } 2864 2865 enable_scrq_irq(adapter, scrq); 2866 2867 if (pending_scrq(adapter, scrq)) { 2868 disable_scrq_irq(adapter, scrq); 2869 goto restart_loop; 2870 } 2871 2872 return 0; 2873 } 2874 2875 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2876 { 2877 struct ibmvnic_sub_crq_queue *scrq = instance; 2878 struct ibmvnic_adapter *adapter = scrq->adapter; 2879 2880 disable_scrq_irq(adapter, scrq); 2881 ibmvnic_complete_tx(adapter, scrq); 2882 2883 return IRQ_HANDLED; 2884 } 2885 2886 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2887 { 2888 struct ibmvnic_sub_crq_queue *scrq = instance; 2889 struct ibmvnic_adapter *adapter = scrq->adapter; 2890 2891 /* When booting a kdump kernel we can hit pending interrupts 2892 * prior to completing driver initialization. 2893 */ 2894 if (unlikely(adapter->state != VNIC_OPEN)) 2895 return IRQ_NONE; 2896 2897 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2898 2899 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2900 disable_scrq_irq(adapter, scrq); 2901 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2902 } 2903 2904 return IRQ_HANDLED; 2905 } 2906 2907 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2908 { 2909 struct device *dev = &adapter->vdev->dev; 2910 struct ibmvnic_sub_crq_queue *scrq; 2911 int i = 0, j = 0; 2912 int rc = 0; 2913 2914 for (i = 0; i < adapter->req_tx_queues; i++) { 2915 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2916 i); 2917 scrq = adapter->tx_scrq[i]; 2918 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2919 2920 if (!scrq->irq) { 2921 rc = -EINVAL; 2922 dev_err(dev, "Error mapping irq\n"); 2923 goto req_tx_irq_failed; 2924 } 2925 2926 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2927 0, "ibmvnic_tx", scrq); 2928 2929 if (rc) { 2930 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2931 scrq->irq, rc); 2932 irq_dispose_mapping(scrq->irq); 2933 goto req_tx_irq_failed; 2934 } 2935 } 2936 2937 for (i = 0; i < adapter->req_rx_queues; i++) { 2938 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2939 i); 2940 scrq = adapter->rx_scrq[i]; 2941 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2942 if (!scrq->irq) { 2943 rc = -EINVAL; 2944 dev_err(dev, "Error mapping irq\n"); 2945 goto req_rx_irq_failed; 2946 } 2947 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2948 0, "ibmvnic_rx", scrq); 2949 if (rc) { 2950 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2951 scrq->irq, rc); 2952 irq_dispose_mapping(scrq->irq); 2953 goto req_rx_irq_failed; 2954 } 2955 } 2956 return rc; 2957 2958 req_rx_irq_failed: 2959 for (j = 0; j < i; j++) { 2960 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2961 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2962 } 2963 i = adapter->req_tx_queues; 2964 req_tx_irq_failed: 2965 for (j = 0; j < i; j++) { 2966 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2967 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2968 } 2969 release_sub_crqs(adapter, 1); 2970 return rc; 2971 } 2972 2973 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2974 { 2975 struct device *dev = &adapter->vdev->dev; 2976 struct ibmvnic_sub_crq_queue **allqueues; 2977 int registered_queues = 0; 2978 int total_queues; 2979 int more = 0; 2980 int i; 2981 2982 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2983 2984 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2985 if (!allqueues) 2986 return -1; 2987 2988 for (i = 0; i < total_queues; i++) { 2989 allqueues[i] = init_sub_crq_queue(adapter); 2990 if (!allqueues[i]) { 2991 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2992 break; 2993 } 2994 registered_queues++; 2995 } 2996 2997 /* Make sure we were able to register the minimum number of queues */ 2998 if (registered_queues < 2999 adapter->min_tx_queues + adapter->min_rx_queues) { 3000 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3001 goto tx_failed; 3002 } 3003 3004 /* Distribute the failed allocated queues*/ 3005 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3006 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3007 switch (i % 3) { 3008 case 0: 3009 if (adapter->req_rx_queues > adapter->min_rx_queues) 3010 adapter->req_rx_queues--; 3011 else 3012 more++; 3013 break; 3014 case 1: 3015 if (adapter->req_tx_queues > adapter->min_tx_queues) 3016 adapter->req_tx_queues--; 3017 else 3018 more++; 3019 break; 3020 } 3021 } 3022 3023 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3024 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3025 if (!adapter->tx_scrq) 3026 goto tx_failed; 3027 3028 for (i = 0; i < adapter->req_tx_queues; i++) { 3029 adapter->tx_scrq[i] = allqueues[i]; 3030 adapter->tx_scrq[i]->pool_index = i; 3031 adapter->num_active_tx_scrqs++; 3032 } 3033 3034 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3035 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3036 if (!adapter->rx_scrq) 3037 goto rx_failed; 3038 3039 for (i = 0; i < adapter->req_rx_queues; i++) { 3040 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3041 adapter->rx_scrq[i]->scrq_num = i; 3042 adapter->num_active_rx_scrqs++; 3043 } 3044 3045 kfree(allqueues); 3046 return 0; 3047 3048 rx_failed: 3049 kfree(adapter->tx_scrq); 3050 adapter->tx_scrq = NULL; 3051 tx_failed: 3052 for (i = 0; i < registered_queues; i++) 3053 release_sub_crq_queue(adapter, allqueues[i], 1); 3054 kfree(allqueues); 3055 return -1; 3056 } 3057 3058 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3059 { 3060 struct device *dev = &adapter->vdev->dev; 3061 union ibmvnic_crq crq; 3062 int max_entries; 3063 3064 if (!retry) { 3065 /* Sub-CRQ entries are 32 byte long */ 3066 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3067 3068 if (adapter->min_tx_entries_per_subcrq > entries_page || 3069 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3070 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3071 return; 3072 } 3073 3074 if (adapter->desired.mtu) 3075 adapter->req_mtu = adapter->desired.mtu; 3076 else 3077 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3078 3079 if (!adapter->desired.tx_entries) 3080 adapter->desired.tx_entries = 3081 adapter->max_tx_entries_per_subcrq; 3082 if (!adapter->desired.rx_entries) 3083 adapter->desired.rx_entries = 3084 adapter->max_rx_add_entries_per_subcrq; 3085 3086 max_entries = IBMVNIC_MAX_LTB_SIZE / 3087 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3088 3089 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3090 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3091 adapter->desired.tx_entries = max_entries; 3092 } 3093 3094 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3095 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3096 adapter->desired.rx_entries = max_entries; 3097 } 3098 3099 if (adapter->desired.tx_entries) 3100 adapter->req_tx_entries_per_subcrq = 3101 adapter->desired.tx_entries; 3102 else 3103 adapter->req_tx_entries_per_subcrq = 3104 adapter->max_tx_entries_per_subcrq; 3105 3106 if (adapter->desired.rx_entries) 3107 adapter->req_rx_add_entries_per_subcrq = 3108 adapter->desired.rx_entries; 3109 else 3110 adapter->req_rx_add_entries_per_subcrq = 3111 adapter->max_rx_add_entries_per_subcrq; 3112 3113 if (adapter->desired.tx_queues) 3114 adapter->req_tx_queues = 3115 adapter->desired.tx_queues; 3116 else 3117 adapter->req_tx_queues = 3118 adapter->opt_tx_comp_sub_queues; 3119 3120 if (adapter->desired.rx_queues) 3121 adapter->req_rx_queues = 3122 adapter->desired.rx_queues; 3123 else 3124 adapter->req_rx_queues = 3125 adapter->opt_rx_comp_queues; 3126 3127 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3128 } 3129 3130 memset(&crq, 0, sizeof(crq)); 3131 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3132 crq.request_capability.cmd = REQUEST_CAPABILITY; 3133 3134 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3135 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3136 atomic_inc(&adapter->running_cap_crqs); 3137 ibmvnic_send_crq(adapter, &crq); 3138 3139 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3140 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3141 atomic_inc(&adapter->running_cap_crqs); 3142 ibmvnic_send_crq(adapter, &crq); 3143 3144 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3145 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3146 atomic_inc(&adapter->running_cap_crqs); 3147 ibmvnic_send_crq(adapter, &crq); 3148 3149 crq.request_capability.capability = 3150 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3151 crq.request_capability.number = 3152 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3153 atomic_inc(&adapter->running_cap_crqs); 3154 ibmvnic_send_crq(adapter, &crq); 3155 3156 crq.request_capability.capability = 3157 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3158 crq.request_capability.number = 3159 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3160 atomic_inc(&adapter->running_cap_crqs); 3161 ibmvnic_send_crq(adapter, &crq); 3162 3163 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3164 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3165 atomic_inc(&adapter->running_cap_crqs); 3166 ibmvnic_send_crq(adapter, &crq); 3167 3168 if (adapter->netdev->flags & IFF_PROMISC) { 3169 if (adapter->promisc_supported) { 3170 crq.request_capability.capability = 3171 cpu_to_be16(PROMISC_REQUESTED); 3172 crq.request_capability.number = cpu_to_be64(1); 3173 atomic_inc(&adapter->running_cap_crqs); 3174 ibmvnic_send_crq(adapter, &crq); 3175 } 3176 } else { 3177 crq.request_capability.capability = 3178 cpu_to_be16(PROMISC_REQUESTED); 3179 crq.request_capability.number = cpu_to_be64(0); 3180 atomic_inc(&adapter->running_cap_crqs); 3181 ibmvnic_send_crq(adapter, &crq); 3182 } 3183 } 3184 3185 static int pending_scrq(struct ibmvnic_adapter *adapter, 3186 struct ibmvnic_sub_crq_queue *scrq) 3187 { 3188 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3189 3190 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3191 return 1; 3192 else 3193 return 0; 3194 } 3195 3196 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3197 struct ibmvnic_sub_crq_queue *scrq) 3198 { 3199 union sub_crq *entry; 3200 unsigned long flags; 3201 3202 spin_lock_irqsave(&scrq->lock, flags); 3203 entry = &scrq->msgs[scrq->cur]; 3204 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3205 if (++scrq->cur == scrq->size) 3206 scrq->cur = 0; 3207 } else { 3208 entry = NULL; 3209 } 3210 spin_unlock_irqrestore(&scrq->lock, flags); 3211 3212 return entry; 3213 } 3214 3215 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3216 { 3217 struct ibmvnic_crq_queue *queue = &adapter->crq; 3218 union ibmvnic_crq *crq; 3219 3220 crq = &queue->msgs[queue->cur]; 3221 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3222 if (++queue->cur == queue->size) 3223 queue->cur = 0; 3224 } else { 3225 crq = NULL; 3226 } 3227 3228 return crq; 3229 } 3230 3231 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3232 { 3233 switch (rc) { 3234 case H_PARAMETER: 3235 dev_warn_ratelimited(dev, 3236 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3237 func, rc); 3238 break; 3239 case H_CLOSED: 3240 dev_warn_ratelimited(dev, 3241 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3242 func, rc); 3243 break; 3244 default: 3245 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3246 break; 3247 } 3248 } 3249 3250 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3251 union sub_crq *sub_crq) 3252 { 3253 unsigned int ua = adapter->vdev->unit_address; 3254 struct device *dev = &adapter->vdev->dev; 3255 u64 *u64_crq = (u64 *)sub_crq; 3256 int rc; 3257 3258 netdev_dbg(adapter->netdev, 3259 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3260 (unsigned long int)cpu_to_be64(remote_handle), 3261 (unsigned long int)cpu_to_be64(u64_crq[0]), 3262 (unsigned long int)cpu_to_be64(u64_crq[1]), 3263 (unsigned long int)cpu_to_be64(u64_crq[2]), 3264 (unsigned long int)cpu_to_be64(u64_crq[3])); 3265 3266 /* Make sure the hypervisor sees the complete request */ 3267 mb(); 3268 3269 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3270 cpu_to_be64(remote_handle), 3271 cpu_to_be64(u64_crq[0]), 3272 cpu_to_be64(u64_crq[1]), 3273 cpu_to_be64(u64_crq[2]), 3274 cpu_to_be64(u64_crq[3])); 3275 3276 if (rc) 3277 print_subcrq_error(dev, rc, __func__); 3278 3279 return rc; 3280 } 3281 3282 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3283 u64 remote_handle, u64 ioba, u64 num_entries) 3284 { 3285 unsigned int ua = adapter->vdev->unit_address; 3286 struct device *dev = &adapter->vdev->dev; 3287 int rc; 3288 3289 /* Make sure the hypervisor sees the complete request */ 3290 mb(); 3291 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3292 cpu_to_be64(remote_handle), 3293 ioba, num_entries); 3294 3295 if (rc) 3296 print_subcrq_error(dev, rc, __func__); 3297 3298 return rc; 3299 } 3300 3301 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3302 union ibmvnic_crq *crq) 3303 { 3304 unsigned int ua = adapter->vdev->unit_address; 3305 struct device *dev = &adapter->vdev->dev; 3306 u64 *u64_crq = (u64 *)crq; 3307 int rc; 3308 3309 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3310 (unsigned long int)cpu_to_be64(u64_crq[0]), 3311 (unsigned long int)cpu_to_be64(u64_crq[1])); 3312 3313 if (!adapter->crq.active && 3314 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3315 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3316 return -EINVAL; 3317 } 3318 3319 /* Make sure the hypervisor sees the complete request */ 3320 mb(); 3321 3322 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3323 cpu_to_be64(u64_crq[0]), 3324 cpu_to_be64(u64_crq[1])); 3325 3326 if (rc) { 3327 if (rc == H_CLOSED) { 3328 dev_warn(dev, "CRQ Queue closed\n"); 3329 if (adapter->resetting) 3330 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3331 } 3332 3333 dev_warn(dev, "Send error (rc=%d)\n", rc); 3334 } 3335 3336 return rc; 3337 } 3338 3339 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3340 { 3341 union ibmvnic_crq crq; 3342 3343 memset(&crq, 0, sizeof(crq)); 3344 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3345 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3346 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3347 3348 return ibmvnic_send_crq(adapter, &crq); 3349 } 3350 3351 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3352 { 3353 union ibmvnic_crq crq; 3354 3355 memset(&crq, 0, sizeof(crq)); 3356 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3357 crq.version_exchange.cmd = VERSION_EXCHANGE; 3358 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3359 3360 return ibmvnic_send_crq(adapter, &crq); 3361 } 3362 3363 struct vnic_login_client_data { 3364 u8 type; 3365 __be16 len; 3366 char name[]; 3367 } __packed; 3368 3369 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3370 { 3371 int len; 3372 3373 /* Calculate the amount of buffer space needed for the 3374 * vnic client data in the login buffer. There are four entries, 3375 * OS name, LPAR name, device name, and a null last entry. 3376 */ 3377 len = 4 * sizeof(struct vnic_login_client_data); 3378 len += 6; /* "Linux" plus NULL */ 3379 len += strlen(utsname()->nodename) + 1; 3380 len += strlen(adapter->netdev->name) + 1; 3381 3382 return len; 3383 } 3384 3385 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3386 struct vnic_login_client_data *vlcd) 3387 { 3388 const char *os_name = "Linux"; 3389 int len; 3390 3391 /* Type 1 - LPAR OS */ 3392 vlcd->type = 1; 3393 len = strlen(os_name) + 1; 3394 vlcd->len = cpu_to_be16(len); 3395 strncpy(vlcd->name, os_name, len); 3396 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3397 3398 /* Type 2 - LPAR name */ 3399 vlcd->type = 2; 3400 len = strlen(utsname()->nodename) + 1; 3401 vlcd->len = cpu_to_be16(len); 3402 strncpy(vlcd->name, utsname()->nodename, len); 3403 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3404 3405 /* Type 3 - device name */ 3406 vlcd->type = 3; 3407 len = strlen(adapter->netdev->name) + 1; 3408 vlcd->len = cpu_to_be16(len); 3409 strncpy(vlcd->name, adapter->netdev->name, len); 3410 } 3411 3412 static int send_login(struct ibmvnic_adapter *adapter) 3413 { 3414 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3415 struct ibmvnic_login_buffer *login_buffer; 3416 struct device *dev = &adapter->vdev->dev; 3417 dma_addr_t rsp_buffer_token; 3418 dma_addr_t buffer_token; 3419 size_t rsp_buffer_size; 3420 union ibmvnic_crq crq; 3421 size_t buffer_size; 3422 __be64 *tx_list_p; 3423 __be64 *rx_list_p; 3424 int client_data_len; 3425 struct vnic_login_client_data *vlcd; 3426 int i; 3427 3428 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3429 netdev_err(adapter->netdev, 3430 "RX or TX queues are not allocated, device login failed\n"); 3431 return -1; 3432 } 3433 3434 release_login_rsp_buffer(adapter); 3435 client_data_len = vnic_client_data_len(adapter); 3436 3437 buffer_size = 3438 sizeof(struct ibmvnic_login_buffer) + 3439 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3440 client_data_len; 3441 3442 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3443 if (!login_buffer) 3444 goto buf_alloc_failed; 3445 3446 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3447 DMA_TO_DEVICE); 3448 if (dma_mapping_error(dev, buffer_token)) { 3449 dev_err(dev, "Couldn't map login buffer\n"); 3450 goto buf_map_failed; 3451 } 3452 3453 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3454 sizeof(u64) * adapter->req_tx_queues + 3455 sizeof(u64) * adapter->req_rx_queues + 3456 sizeof(u64) * adapter->req_rx_queues + 3457 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3458 3459 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3460 if (!login_rsp_buffer) 3461 goto buf_rsp_alloc_failed; 3462 3463 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3464 rsp_buffer_size, DMA_FROM_DEVICE); 3465 if (dma_mapping_error(dev, rsp_buffer_token)) { 3466 dev_err(dev, "Couldn't map login rsp buffer\n"); 3467 goto buf_rsp_map_failed; 3468 } 3469 3470 adapter->login_buf = login_buffer; 3471 adapter->login_buf_token = buffer_token; 3472 adapter->login_buf_sz = buffer_size; 3473 adapter->login_rsp_buf = login_rsp_buffer; 3474 adapter->login_rsp_buf_token = rsp_buffer_token; 3475 adapter->login_rsp_buf_sz = rsp_buffer_size; 3476 3477 login_buffer->len = cpu_to_be32(buffer_size); 3478 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3479 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3480 login_buffer->off_txcomp_subcrqs = 3481 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3482 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3483 login_buffer->off_rxcomp_subcrqs = 3484 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3485 sizeof(u64) * adapter->req_tx_queues); 3486 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3487 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3488 3489 tx_list_p = (__be64 *)((char *)login_buffer + 3490 sizeof(struct ibmvnic_login_buffer)); 3491 rx_list_p = (__be64 *)((char *)login_buffer + 3492 sizeof(struct ibmvnic_login_buffer) + 3493 sizeof(u64) * adapter->req_tx_queues); 3494 3495 for (i = 0; i < adapter->req_tx_queues; i++) { 3496 if (adapter->tx_scrq[i]) { 3497 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3498 crq_num); 3499 } 3500 } 3501 3502 for (i = 0; i < adapter->req_rx_queues; i++) { 3503 if (adapter->rx_scrq[i]) { 3504 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3505 crq_num); 3506 } 3507 } 3508 3509 /* Insert vNIC login client data */ 3510 vlcd = (struct vnic_login_client_data *) 3511 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3512 login_buffer->client_data_offset = 3513 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3514 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3515 3516 vnic_add_client_data(adapter, vlcd); 3517 3518 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3519 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3520 netdev_dbg(adapter->netdev, "%016lx\n", 3521 ((unsigned long int *)(adapter->login_buf))[i]); 3522 } 3523 3524 memset(&crq, 0, sizeof(crq)); 3525 crq.login.first = IBMVNIC_CRQ_CMD; 3526 crq.login.cmd = LOGIN; 3527 crq.login.ioba = cpu_to_be32(buffer_token); 3528 crq.login.len = cpu_to_be32(buffer_size); 3529 ibmvnic_send_crq(adapter, &crq); 3530 3531 return 0; 3532 3533 buf_rsp_map_failed: 3534 kfree(login_rsp_buffer); 3535 buf_rsp_alloc_failed: 3536 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3537 buf_map_failed: 3538 kfree(login_buffer); 3539 buf_alloc_failed: 3540 return -1; 3541 } 3542 3543 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3544 u32 len, u8 map_id) 3545 { 3546 union ibmvnic_crq crq; 3547 3548 memset(&crq, 0, sizeof(crq)); 3549 crq.request_map.first = IBMVNIC_CRQ_CMD; 3550 crq.request_map.cmd = REQUEST_MAP; 3551 crq.request_map.map_id = map_id; 3552 crq.request_map.ioba = cpu_to_be32(addr); 3553 crq.request_map.len = cpu_to_be32(len); 3554 return ibmvnic_send_crq(adapter, &crq); 3555 } 3556 3557 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3558 { 3559 union ibmvnic_crq crq; 3560 3561 memset(&crq, 0, sizeof(crq)); 3562 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3563 crq.request_unmap.cmd = REQUEST_UNMAP; 3564 crq.request_unmap.map_id = map_id; 3565 return ibmvnic_send_crq(adapter, &crq); 3566 } 3567 3568 static void send_map_query(struct ibmvnic_adapter *adapter) 3569 { 3570 union ibmvnic_crq crq; 3571 3572 memset(&crq, 0, sizeof(crq)); 3573 crq.query_map.first = IBMVNIC_CRQ_CMD; 3574 crq.query_map.cmd = QUERY_MAP; 3575 ibmvnic_send_crq(adapter, &crq); 3576 } 3577 3578 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3579 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3580 { 3581 union ibmvnic_crq crq; 3582 3583 atomic_set(&adapter->running_cap_crqs, 0); 3584 memset(&crq, 0, sizeof(crq)); 3585 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3586 crq.query_capability.cmd = QUERY_CAPABILITY; 3587 3588 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3589 atomic_inc(&adapter->running_cap_crqs); 3590 ibmvnic_send_crq(adapter, &crq); 3591 3592 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3593 atomic_inc(&adapter->running_cap_crqs); 3594 ibmvnic_send_crq(adapter, &crq); 3595 3596 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3597 atomic_inc(&adapter->running_cap_crqs); 3598 ibmvnic_send_crq(adapter, &crq); 3599 3600 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3601 atomic_inc(&adapter->running_cap_crqs); 3602 ibmvnic_send_crq(adapter, &crq); 3603 3604 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3605 atomic_inc(&adapter->running_cap_crqs); 3606 ibmvnic_send_crq(adapter, &crq); 3607 3608 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3609 atomic_inc(&adapter->running_cap_crqs); 3610 ibmvnic_send_crq(adapter, &crq); 3611 3612 crq.query_capability.capability = 3613 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3614 atomic_inc(&adapter->running_cap_crqs); 3615 ibmvnic_send_crq(adapter, &crq); 3616 3617 crq.query_capability.capability = 3618 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3619 atomic_inc(&adapter->running_cap_crqs); 3620 ibmvnic_send_crq(adapter, &crq); 3621 3622 crq.query_capability.capability = 3623 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3624 atomic_inc(&adapter->running_cap_crqs); 3625 ibmvnic_send_crq(adapter, &crq); 3626 3627 crq.query_capability.capability = 3628 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3629 atomic_inc(&adapter->running_cap_crqs); 3630 ibmvnic_send_crq(adapter, &crq); 3631 3632 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3633 atomic_inc(&adapter->running_cap_crqs); 3634 ibmvnic_send_crq(adapter, &crq); 3635 3636 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3637 atomic_inc(&adapter->running_cap_crqs); 3638 ibmvnic_send_crq(adapter, &crq); 3639 3640 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3641 atomic_inc(&adapter->running_cap_crqs); 3642 ibmvnic_send_crq(adapter, &crq); 3643 3644 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3645 atomic_inc(&adapter->running_cap_crqs); 3646 ibmvnic_send_crq(adapter, &crq); 3647 3648 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3649 atomic_inc(&adapter->running_cap_crqs); 3650 ibmvnic_send_crq(adapter, &crq); 3651 3652 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3653 atomic_inc(&adapter->running_cap_crqs); 3654 ibmvnic_send_crq(adapter, &crq); 3655 3656 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3657 atomic_inc(&adapter->running_cap_crqs); 3658 ibmvnic_send_crq(adapter, &crq); 3659 3660 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3661 atomic_inc(&adapter->running_cap_crqs); 3662 ibmvnic_send_crq(adapter, &crq); 3663 3664 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3665 atomic_inc(&adapter->running_cap_crqs); 3666 ibmvnic_send_crq(adapter, &crq); 3667 3668 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3669 atomic_inc(&adapter->running_cap_crqs); 3670 ibmvnic_send_crq(adapter, &crq); 3671 3672 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3673 atomic_inc(&adapter->running_cap_crqs); 3674 ibmvnic_send_crq(adapter, &crq); 3675 3676 crq.query_capability.capability = 3677 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3678 atomic_inc(&adapter->running_cap_crqs); 3679 ibmvnic_send_crq(adapter, &crq); 3680 3681 crq.query_capability.capability = 3682 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3683 atomic_inc(&adapter->running_cap_crqs); 3684 ibmvnic_send_crq(adapter, &crq); 3685 3686 crq.query_capability.capability = 3687 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3688 atomic_inc(&adapter->running_cap_crqs); 3689 ibmvnic_send_crq(adapter, &crq); 3690 3691 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3692 atomic_inc(&adapter->running_cap_crqs); 3693 ibmvnic_send_crq(adapter, &crq); 3694 } 3695 3696 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3697 struct ibmvnic_adapter *adapter) 3698 { 3699 struct device *dev = &adapter->vdev->dev; 3700 3701 if (crq->get_vpd_size_rsp.rc.code) { 3702 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3703 crq->get_vpd_size_rsp.rc.code); 3704 complete(&adapter->fw_done); 3705 return; 3706 } 3707 3708 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3709 complete(&adapter->fw_done); 3710 } 3711 3712 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3713 struct ibmvnic_adapter *adapter) 3714 { 3715 struct device *dev = &adapter->vdev->dev; 3716 unsigned char *substr = NULL; 3717 u8 fw_level_len = 0; 3718 3719 memset(adapter->fw_version, 0, 32); 3720 3721 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3722 DMA_FROM_DEVICE); 3723 3724 if (crq->get_vpd_rsp.rc.code) { 3725 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3726 crq->get_vpd_rsp.rc.code); 3727 goto complete; 3728 } 3729 3730 /* get the position of the firmware version info 3731 * located after the ASCII 'RM' substring in the buffer 3732 */ 3733 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3734 if (!substr) { 3735 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3736 goto complete; 3737 } 3738 3739 /* get length of firmware level ASCII substring */ 3740 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3741 fw_level_len = *(substr + 2); 3742 } else { 3743 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3744 goto complete; 3745 } 3746 3747 /* copy firmware version string from vpd into adapter */ 3748 if ((substr + 3 + fw_level_len) < 3749 (adapter->vpd->buff + adapter->vpd->len)) { 3750 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3751 } else { 3752 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3753 } 3754 3755 complete: 3756 if (adapter->fw_version[0] == '\0') 3757 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3758 complete(&adapter->fw_done); 3759 } 3760 3761 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3762 { 3763 struct device *dev = &adapter->vdev->dev; 3764 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3765 union ibmvnic_crq crq; 3766 int i; 3767 3768 dma_unmap_single(dev, adapter->ip_offload_tok, 3769 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3770 3771 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3772 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3773 netdev_dbg(adapter->netdev, "%016lx\n", 3774 ((unsigned long int *)(buf))[i]); 3775 3776 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3777 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3778 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3779 buf->tcp_ipv4_chksum); 3780 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3781 buf->tcp_ipv6_chksum); 3782 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3783 buf->udp_ipv4_chksum); 3784 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3785 buf->udp_ipv6_chksum); 3786 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3787 buf->large_tx_ipv4); 3788 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3789 buf->large_tx_ipv6); 3790 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3791 buf->large_rx_ipv4); 3792 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3793 buf->large_rx_ipv6); 3794 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3795 buf->max_ipv4_header_size); 3796 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3797 buf->max_ipv6_header_size); 3798 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3799 buf->max_tcp_header_size); 3800 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3801 buf->max_udp_header_size); 3802 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3803 buf->max_large_tx_size); 3804 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3805 buf->max_large_rx_size); 3806 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3807 buf->ipv6_extension_header); 3808 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3809 buf->tcp_pseudosum_req); 3810 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3811 buf->num_ipv6_ext_headers); 3812 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3813 buf->off_ipv6_ext_headers); 3814 3815 adapter->ip_offload_ctrl_tok = 3816 dma_map_single(dev, &adapter->ip_offload_ctrl, 3817 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3818 3819 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3820 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3821 return; 3822 } 3823 3824 adapter->ip_offload_ctrl.len = 3825 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3826 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3827 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3828 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3829 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3830 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3831 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3832 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3833 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3834 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3835 3836 /* large_rx disabled for now, additional features needed */ 3837 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3838 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3839 3840 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3841 3842 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3843 adapter->netdev->features |= NETIF_F_IP_CSUM; 3844 3845 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3846 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3847 3848 if ((adapter->netdev->features & 3849 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3850 adapter->netdev->features |= NETIF_F_RXCSUM; 3851 3852 if (buf->large_tx_ipv4) 3853 adapter->netdev->features |= NETIF_F_TSO; 3854 if (buf->large_tx_ipv6) 3855 adapter->netdev->features |= NETIF_F_TSO6; 3856 3857 adapter->netdev->hw_features |= adapter->netdev->features; 3858 3859 memset(&crq, 0, sizeof(crq)); 3860 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3861 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3862 crq.control_ip_offload.len = 3863 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3864 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3865 ibmvnic_send_crq(adapter, &crq); 3866 } 3867 3868 static const char *ibmvnic_fw_err_cause(u16 cause) 3869 { 3870 switch (cause) { 3871 case ADAPTER_PROBLEM: 3872 return "adapter problem"; 3873 case BUS_PROBLEM: 3874 return "bus problem"; 3875 case FW_PROBLEM: 3876 return "firmware problem"; 3877 case DD_PROBLEM: 3878 return "device driver problem"; 3879 case EEH_RECOVERY: 3880 return "EEH recovery"; 3881 case FW_UPDATED: 3882 return "firmware updated"; 3883 case LOW_MEMORY: 3884 return "low Memory"; 3885 default: 3886 return "unknown"; 3887 } 3888 } 3889 3890 static void handle_error_indication(union ibmvnic_crq *crq, 3891 struct ibmvnic_adapter *adapter) 3892 { 3893 struct device *dev = &adapter->vdev->dev; 3894 u16 cause; 3895 3896 cause = be16_to_cpu(crq->error_indication.error_cause); 3897 3898 dev_warn_ratelimited(dev, 3899 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3900 crq->error_indication.flags 3901 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3902 ibmvnic_fw_err_cause(cause)); 3903 3904 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3905 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3906 else 3907 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3908 } 3909 3910 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3911 struct ibmvnic_adapter *adapter) 3912 { 3913 struct net_device *netdev = adapter->netdev; 3914 struct device *dev = &adapter->vdev->dev; 3915 long rc; 3916 3917 rc = crq->change_mac_addr_rsp.rc.code; 3918 if (rc) { 3919 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3920 goto out; 3921 } 3922 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3923 ETH_ALEN); 3924 out: 3925 complete(&adapter->fw_done); 3926 return rc; 3927 } 3928 3929 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3930 struct ibmvnic_adapter *adapter) 3931 { 3932 struct device *dev = &adapter->vdev->dev; 3933 u64 *req_value; 3934 char *name; 3935 3936 atomic_dec(&adapter->running_cap_crqs); 3937 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3938 case REQ_TX_QUEUES: 3939 req_value = &adapter->req_tx_queues; 3940 name = "tx"; 3941 break; 3942 case REQ_RX_QUEUES: 3943 req_value = &adapter->req_rx_queues; 3944 name = "rx"; 3945 break; 3946 case REQ_RX_ADD_QUEUES: 3947 req_value = &adapter->req_rx_add_queues; 3948 name = "rx_add"; 3949 break; 3950 case REQ_TX_ENTRIES_PER_SUBCRQ: 3951 req_value = &adapter->req_tx_entries_per_subcrq; 3952 name = "tx_entries_per_subcrq"; 3953 break; 3954 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3955 req_value = &adapter->req_rx_add_entries_per_subcrq; 3956 name = "rx_add_entries_per_subcrq"; 3957 break; 3958 case REQ_MTU: 3959 req_value = &adapter->req_mtu; 3960 name = "mtu"; 3961 break; 3962 case PROMISC_REQUESTED: 3963 req_value = &adapter->promisc; 3964 name = "promisc"; 3965 break; 3966 default: 3967 dev_err(dev, "Got invalid cap request rsp %d\n", 3968 crq->request_capability.capability); 3969 return; 3970 } 3971 3972 switch (crq->request_capability_rsp.rc.code) { 3973 case SUCCESS: 3974 break; 3975 case PARTIALSUCCESS: 3976 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3977 *req_value, 3978 (long int)be64_to_cpu(crq->request_capability_rsp. 3979 number), name); 3980 3981 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3982 REQ_MTU) { 3983 pr_err("mtu of %llu is not supported. Reverting.\n", 3984 *req_value); 3985 *req_value = adapter->fallback.mtu; 3986 } else { 3987 *req_value = 3988 be64_to_cpu(crq->request_capability_rsp.number); 3989 } 3990 3991 ibmvnic_send_req_caps(adapter, 1); 3992 return; 3993 default: 3994 dev_err(dev, "Error %d in request cap rsp\n", 3995 crq->request_capability_rsp.rc.code); 3996 return; 3997 } 3998 3999 /* Done receiving requested capabilities, query IP offload support */ 4000 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4001 union ibmvnic_crq newcrq; 4002 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4003 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4004 &adapter->ip_offload_buf; 4005 4006 adapter->wait_capability = false; 4007 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4008 buf_sz, 4009 DMA_FROM_DEVICE); 4010 4011 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4012 if (!firmware_has_feature(FW_FEATURE_CMO)) 4013 dev_err(dev, "Couldn't map offload buffer\n"); 4014 return; 4015 } 4016 4017 memset(&newcrq, 0, sizeof(newcrq)); 4018 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4019 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4020 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4021 newcrq.query_ip_offload.ioba = 4022 cpu_to_be32(adapter->ip_offload_tok); 4023 4024 ibmvnic_send_crq(adapter, &newcrq); 4025 } 4026 } 4027 4028 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4029 struct ibmvnic_adapter *adapter) 4030 { 4031 struct device *dev = &adapter->vdev->dev; 4032 struct net_device *netdev = adapter->netdev; 4033 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4034 struct ibmvnic_login_buffer *login = adapter->login_buf; 4035 int i; 4036 4037 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4038 DMA_TO_DEVICE); 4039 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4040 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4041 4042 /* If the number of queues requested can't be allocated by the 4043 * server, the login response will return with code 1. We will need 4044 * to resend the login buffer with fewer queues requested. 4045 */ 4046 if (login_rsp_crq->generic.rc.code) { 4047 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4048 complete(&adapter->init_done); 4049 return 0; 4050 } 4051 4052 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4053 4054 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4055 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4056 netdev_dbg(adapter->netdev, "%016lx\n", 4057 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4058 } 4059 4060 /* Sanity checks */ 4061 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4062 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4063 adapter->req_rx_add_queues != 4064 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4065 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4066 ibmvnic_remove(adapter->vdev); 4067 return -EIO; 4068 } 4069 release_login_buffer(adapter); 4070 complete(&adapter->init_done); 4071 4072 return 0; 4073 } 4074 4075 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4076 struct ibmvnic_adapter *adapter) 4077 { 4078 struct device *dev = &adapter->vdev->dev; 4079 long rc; 4080 4081 rc = crq->request_unmap_rsp.rc.code; 4082 if (rc) 4083 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4084 } 4085 4086 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4087 struct ibmvnic_adapter *adapter) 4088 { 4089 struct net_device *netdev = adapter->netdev; 4090 struct device *dev = &adapter->vdev->dev; 4091 long rc; 4092 4093 rc = crq->query_map_rsp.rc.code; 4094 if (rc) { 4095 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4096 return; 4097 } 4098 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4099 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4100 crq->query_map_rsp.free_pages); 4101 } 4102 4103 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4104 struct ibmvnic_adapter *adapter) 4105 { 4106 struct net_device *netdev = adapter->netdev; 4107 struct device *dev = &adapter->vdev->dev; 4108 long rc; 4109 4110 atomic_dec(&adapter->running_cap_crqs); 4111 netdev_dbg(netdev, "Outstanding queries: %d\n", 4112 atomic_read(&adapter->running_cap_crqs)); 4113 rc = crq->query_capability.rc.code; 4114 if (rc) { 4115 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4116 goto out; 4117 } 4118 4119 switch (be16_to_cpu(crq->query_capability.capability)) { 4120 case MIN_TX_QUEUES: 4121 adapter->min_tx_queues = 4122 be64_to_cpu(crq->query_capability.number); 4123 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4124 adapter->min_tx_queues); 4125 break; 4126 case MIN_RX_QUEUES: 4127 adapter->min_rx_queues = 4128 be64_to_cpu(crq->query_capability.number); 4129 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4130 adapter->min_rx_queues); 4131 break; 4132 case MIN_RX_ADD_QUEUES: 4133 adapter->min_rx_add_queues = 4134 be64_to_cpu(crq->query_capability.number); 4135 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4136 adapter->min_rx_add_queues); 4137 break; 4138 case MAX_TX_QUEUES: 4139 adapter->max_tx_queues = 4140 be64_to_cpu(crq->query_capability.number); 4141 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4142 adapter->max_tx_queues); 4143 break; 4144 case MAX_RX_QUEUES: 4145 adapter->max_rx_queues = 4146 be64_to_cpu(crq->query_capability.number); 4147 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4148 adapter->max_rx_queues); 4149 break; 4150 case MAX_RX_ADD_QUEUES: 4151 adapter->max_rx_add_queues = 4152 be64_to_cpu(crq->query_capability.number); 4153 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4154 adapter->max_rx_add_queues); 4155 break; 4156 case MIN_TX_ENTRIES_PER_SUBCRQ: 4157 adapter->min_tx_entries_per_subcrq = 4158 be64_to_cpu(crq->query_capability.number); 4159 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4160 adapter->min_tx_entries_per_subcrq); 4161 break; 4162 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4163 adapter->min_rx_add_entries_per_subcrq = 4164 be64_to_cpu(crq->query_capability.number); 4165 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4166 adapter->min_rx_add_entries_per_subcrq); 4167 break; 4168 case MAX_TX_ENTRIES_PER_SUBCRQ: 4169 adapter->max_tx_entries_per_subcrq = 4170 be64_to_cpu(crq->query_capability.number); 4171 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4172 adapter->max_tx_entries_per_subcrq); 4173 break; 4174 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4175 adapter->max_rx_add_entries_per_subcrq = 4176 be64_to_cpu(crq->query_capability.number); 4177 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4178 adapter->max_rx_add_entries_per_subcrq); 4179 break; 4180 case TCP_IP_OFFLOAD: 4181 adapter->tcp_ip_offload = 4182 be64_to_cpu(crq->query_capability.number); 4183 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4184 adapter->tcp_ip_offload); 4185 break; 4186 case PROMISC_SUPPORTED: 4187 adapter->promisc_supported = 4188 be64_to_cpu(crq->query_capability.number); 4189 netdev_dbg(netdev, "promisc_supported = %lld\n", 4190 adapter->promisc_supported); 4191 break; 4192 case MIN_MTU: 4193 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4194 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4195 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4196 break; 4197 case MAX_MTU: 4198 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4199 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4200 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4201 break; 4202 case MAX_MULTICAST_FILTERS: 4203 adapter->max_multicast_filters = 4204 be64_to_cpu(crq->query_capability.number); 4205 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4206 adapter->max_multicast_filters); 4207 break; 4208 case VLAN_HEADER_INSERTION: 4209 adapter->vlan_header_insertion = 4210 be64_to_cpu(crq->query_capability.number); 4211 if (adapter->vlan_header_insertion) 4212 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4213 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4214 adapter->vlan_header_insertion); 4215 break; 4216 case RX_VLAN_HEADER_INSERTION: 4217 adapter->rx_vlan_header_insertion = 4218 be64_to_cpu(crq->query_capability.number); 4219 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4220 adapter->rx_vlan_header_insertion); 4221 break; 4222 case MAX_TX_SG_ENTRIES: 4223 adapter->max_tx_sg_entries = 4224 be64_to_cpu(crq->query_capability.number); 4225 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4226 adapter->max_tx_sg_entries); 4227 break; 4228 case RX_SG_SUPPORTED: 4229 adapter->rx_sg_supported = 4230 be64_to_cpu(crq->query_capability.number); 4231 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4232 adapter->rx_sg_supported); 4233 break; 4234 case OPT_TX_COMP_SUB_QUEUES: 4235 adapter->opt_tx_comp_sub_queues = 4236 be64_to_cpu(crq->query_capability.number); 4237 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4238 adapter->opt_tx_comp_sub_queues); 4239 break; 4240 case OPT_RX_COMP_QUEUES: 4241 adapter->opt_rx_comp_queues = 4242 be64_to_cpu(crq->query_capability.number); 4243 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4244 adapter->opt_rx_comp_queues); 4245 break; 4246 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4247 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4248 be64_to_cpu(crq->query_capability.number); 4249 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4250 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4251 break; 4252 case OPT_TX_ENTRIES_PER_SUBCRQ: 4253 adapter->opt_tx_entries_per_subcrq = 4254 be64_to_cpu(crq->query_capability.number); 4255 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4256 adapter->opt_tx_entries_per_subcrq); 4257 break; 4258 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4259 adapter->opt_rxba_entries_per_subcrq = 4260 be64_to_cpu(crq->query_capability.number); 4261 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4262 adapter->opt_rxba_entries_per_subcrq); 4263 break; 4264 case TX_RX_DESC_REQ: 4265 adapter->tx_rx_desc_req = crq->query_capability.number; 4266 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4267 adapter->tx_rx_desc_req); 4268 break; 4269 4270 default: 4271 netdev_err(netdev, "Got invalid cap rsp %d\n", 4272 crq->query_capability.capability); 4273 } 4274 4275 out: 4276 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4277 adapter->wait_capability = false; 4278 ibmvnic_send_req_caps(adapter, 0); 4279 } 4280 } 4281 4282 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4283 struct ibmvnic_adapter *adapter) 4284 { 4285 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4286 struct net_device *netdev = adapter->netdev; 4287 struct device *dev = &adapter->vdev->dev; 4288 u64 *u64_crq = (u64 *)crq; 4289 long rc; 4290 4291 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4292 (unsigned long int)cpu_to_be64(u64_crq[0]), 4293 (unsigned long int)cpu_to_be64(u64_crq[1])); 4294 switch (gen_crq->first) { 4295 case IBMVNIC_CRQ_INIT_RSP: 4296 switch (gen_crq->cmd) { 4297 case IBMVNIC_CRQ_INIT: 4298 dev_info(dev, "Partner initialized\n"); 4299 adapter->from_passive_init = true; 4300 adapter->failover_pending = false; 4301 if (!completion_done(&adapter->init_done)) { 4302 complete(&adapter->init_done); 4303 adapter->init_done_rc = -EIO; 4304 } 4305 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4306 break; 4307 case IBMVNIC_CRQ_INIT_COMPLETE: 4308 dev_info(dev, "Partner initialization complete\n"); 4309 adapter->crq.active = true; 4310 send_version_xchg(adapter); 4311 break; 4312 default: 4313 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4314 } 4315 return; 4316 case IBMVNIC_CRQ_XPORT_EVENT: 4317 netif_carrier_off(netdev); 4318 adapter->crq.active = false; 4319 if (adapter->resetting) 4320 adapter->force_reset_recovery = true; 4321 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4322 dev_info(dev, "Migrated, re-enabling adapter\n"); 4323 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4324 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4325 dev_info(dev, "Backing device failover detected\n"); 4326 adapter->failover_pending = true; 4327 } else { 4328 /* The adapter lost the connection */ 4329 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4330 gen_crq->cmd); 4331 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4332 } 4333 return; 4334 case IBMVNIC_CRQ_CMD_RSP: 4335 break; 4336 default: 4337 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4338 gen_crq->first); 4339 return; 4340 } 4341 4342 switch (gen_crq->cmd) { 4343 case VERSION_EXCHANGE_RSP: 4344 rc = crq->version_exchange_rsp.rc.code; 4345 if (rc) { 4346 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4347 break; 4348 } 4349 dev_info(dev, "Partner protocol version is %d\n", 4350 crq->version_exchange_rsp.version); 4351 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4352 ibmvnic_version) 4353 ibmvnic_version = 4354 be16_to_cpu(crq->version_exchange_rsp.version); 4355 send_cap_queries(adapter); 4356 break; 4357 case QUERY_CAPABILITY_RSP: 4358 handle_query_cap_rsp(crq, adapter); 4359 break; 4360 case QUERY_MAP_RSP: 4361 handle_query_map_rsp(crq, adapter); 4362 break; 4363 case REQUEST_MAP_RSP: 4364 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4365 complete(&adapter->fw_done); 4366 break; 4367 case REQUEST_UNMAP_RSP: 4368 handle_request_unmap_rsp(crq, adapter); 4369 break; 4370 case REQUEST_CAPABILITY_RSP: 4371 handle_request_cap_rsp(crq, adapter); 4372 break; 4373 case LOGIN_RSP: 4374 netdev_dbg(netdev, "Got Login Response\n"); 4375 handle_login_rsp(crq, adapter); 4376 break; 4377 case LOGICAL_LINK_STATE_RSP: 4378 netdev_dbg(netdev, 4379 "Got Logical Link State Response, state: %d rc: %d\n", 4380 crq->logical_link_state_rsp.link_state, 4381 crq->logical_link_state_rsp.rc.code); 4382 adapter->logical_link_state = 4383 crq->logical_link_state_rsp.link_state; 4384 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4385 complete(&adapter->init_done); 4386 break; 4387 case LINK_STATE_INDICATION: 4388 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4389 adapter->phys_link_state = 4390 crq->link_state_indication.phys_link_state; 4391 adapter->logical_link_state = 4392 crq->link_state_indication.logical_link_state; 4393 break; 4394 case CHANGE_MAC_ADDR_RSP: 4395 netdev_dbg(netdev, "Got MAC address change Response\n"); 4396 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4397 break; 4398 case ERROR_INDICATION: 4399 netdev_dbg(netdev, "Got Error Indication\n"); 4400 handle_error_indication(crq, adapter); 4401 break; 4402 case REQUEST_STATISTICS_RSP: 4403 netdev_dbg(netdev, "Got Statistics Response\n"); 4404 complete(&adapter->stats_done); 4405 break; 4406 case QUERY_IP_OFFLOAD_RSP: 4407 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4408 handle_query_ip_offload_rsp(adapter); 4409 break; 4410 case MULTICAST_CTRL_RSP: 4411 netdev_dbg(netdev, "Got multicast control Response\n"); 4412 break; 4413 case CONTROL_IP_OFFLOAD_RSP: 4414 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4415 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4416 sizeof(adapter->ip_offload_ctrl), 4417 DMA_TO_DEVICE); 4418 complete(&adapter->init_done); 4419 break; 4420 case COLLECT_FW_TRACE_RSP: 4421 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4422 complete(&adapter->fw_done); 4423 break; 4424 case GET_VPD_SIZE_RSP: 4425 handle_vpd_size_rsp(crq, adapter); 4426 break; 4427 case GET_VPD_RSP: 4428 handle_vpd_rsp(crq, adapter); 4429 break; 4430 default: 4431 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4432 gen_crq->cmd); 4433 } 4434 } 4435 4436 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4437 { 4438 struct ibmvnic_adapter *adapter = instance; 4439 4440 tasklet_schedule(&adapter->tasklet); 4441 return IRQ_HANDLED; 4442 } 4443 4444 static void ibmvnic_tasklet(void *data) 4445 { 4446 struct ibmvnic_adapter *adapter = data; 4447 struct ibmvnic_crq_queue *queue = &adapter->crq; 4448 union ibmvnic_crq *crq; 4449 unsigned long flags; 4450 bool done = false; 4451 4452 spin_lock_irqsave(&queue->lock, flags); 4453 while (!done) { 4454 /* Pull all the valid messages off the CRQ */ 4455 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4456 ibmvnic_handle_crq(crq, adapter); 4457 crq->generic.first = 0; 4458 } 4459 4460 /* remain in tasklet until all 4461 * capabilities responses are received 4462 */ 4463 if (!adapter->wait_capability) 4464 done = true; 4465 } 4466 /* if capabilities CRQ's were sent in this tasklet, the following 4467 * tasklet must wait until all responses are received 4468 */ 4469 if (atomic_read(&adapter->running_cap_crqs) != 0) 4470 adapter->wait_capability = true; 4471 spin_unlock_irqrestore(&queue->lock, flags); 4472 } 4473 4474 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4475 { 4476 struct vio_dev *vdev = adapter->vdev; 4477 int rc; 4478 4479 do { 4480 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4481 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4482 4483 if (rc) 4484 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4485 4486 return rc; 4487 } 4488 4489 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4490 { 4491 struct ibmvnic_crq_queue *crq = &adapter->crq; 4492 struct device *dev = &adapter->vdev->dev; 4493 struct vio_dev *vdev = adapter->vdev; 4494 int rc; 4495 4496 /* Close the CRQ */ 4497 do { 4498 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4499 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4500 4501 /* Clean out the queue */ 4502 memset(crq->msgs, 0, PAGE_SIZE); 4503 crq->cur = 0; 4504 crq->active = false; 4505 4506 /* And re-open it again */ 4507 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4508 crq->msg_token, PAGE_SIZE); 4509 4510 if (rc == H_CLOSED) 4511 /* Adapter is good, but other end is not ready */ 4512 dev_warn(dev, "Partner adapter not ready\n"); 4513 else if (rc != 0) 4514 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4515 4516 return rc; 4517 } 4518 4519 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4520 { 4521 struct ibmvnic_crq_queue *crq = &adapter->crq; 4522 struct vio_dev *vdev = adapter->vdev; 4523 long rc; 4524 4525 if (!crq->msgs) 4526 return; 4527 4528 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4529 free_irq(vdev->irq, adapter); 4530 tasklet_kill(&adapter->tasklet); 4531 do { 4532 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4533 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4534 4535 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4536 DMA_BIDIRECTIONAL); 4537 free_page((unsigned long)crq->msgs); 4538 crq->msgs = NULL; 4539 crq->active = false; 4540 } 4541 4542 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4543 { 4544 struct ibmvnic_crq_queue *crq = &adapter->crq; 4545 struct device *dev = &adapter->vdev->dev; 4546 struct vio_dev *vdev = adapter->vdev; 4547 int rc, retrc = -ENOMEM; 4548 4549 if (crq->msgs) 4550 return 0; 4551 4552 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4553 /* Should we allocate more than one page? */ 4554 4555 if (!crq->msgs) 4556 return -ENOMEM; 4557 4558 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4559 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4560 DMA_BIDIRECTIONAL); 4561 if (dma_mapping_error(dev, crq->msg_token)) 4562 goto map_failed; 4563 4564 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4565 crq->msg_token, PAGE_SIZE); 4566 4567 if (rc == H_RESOURCE) 4568 /* maybe kexecing and resource is busy. try a reset */ 4569 rc = ibmvnic_reset_crq(adapter); 4570 retrc = rc; 4571 4572 if (rc == H_CLOSED) { 4573 dev_warn(dev, "Partner adapter not ready\n"); 4574 } else if (rc) { 4575 dev_warn(dev, "Error %d opening adapter\n", rc); 4576 goto reg_crq_failed; 4577 } 4578 4579 retrc = 0; 4580 4581 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4582 (unsigned long)adapter); 4583 4584 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4585 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4586 adapter); 4587 if (rc) { 4588 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4589 vdev->irq, rc); 4590 goto req_irq_failed; 4591 } 4592 4593 rc = vio_enable_interrupts(vdev); 4594 if (rc) { 4595 dev_err(dev, "Error %d enabling interrupts\n", rc); 4596 goto req_irq_failed; 4597 } 4598 4599 crq->cur = 0; 4600 spin_lock_init(&crq->lock); 4601 4602 return retrc; 4603 4604 req_irq_failed: 4605 tasklet_kill(&adapter->tasklet); 4606 do { 4607 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4608 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4609 reg_crq_failed: 4610 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4611 map_failed: 4612 free_page((unsigned long)crq->msgs); 4613 crq->msgs = NULL; 4614 return retrc; 4615 } 4616 4617 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4618 { 4619 struct device *dev = &adapter->vdev->dev; 4620 unsigned long timeout = msecs_to_jiffies(30000); 4621 u64 old_num_rx_queues, old_num_tx_queues; 4622 int rc; 4623 4624 adapter->from_passive_init = false; 4625 4626 old_num_rx_queues = adapter->req_rx_queues; 4627 old_num_tx_queues = adapter->req_tx_queues; 4628 4629 init_completion(&adapter->init_done); 4630 adapter->init_done_rc = 0; 4631 ibmvnic_send_crq_init(adapter); 4632 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4633 dev_err(dev, "Initialization sequence timed out\n"); 4634 return -1; 4635 } 4636 4637 if (adapter->init_done_rc) { 4638 release_crq_queue(adapter); 4639 return adapter->init_done_rc; 4640 } 4641 4642 if (adapter->from_passive_init) { 4643 adapter->state = VNIC_OPEN; 4644 adapter->from_passive_init = false; 4645 return -1; 4646 } 4647 4648 if (adapter->resetting && !adapter->wait_for_reset && 4649 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4650 if (adapter->req_rx_queues != old_num_rx_queues || 4651 adapter->req_tx_queues != old_num_tx_queues) { 4652 release_sub_crqs(adapter, 0); 4653 rc = init_sub_crqs(adapter); 4654 } else { 4655 rc = reset_sub_crq_queues(adapter); 4656 } 4657 } else { 4658 rc = init_sub_crqs(adapter); 4659 } 4660 4661 if (rc) { 4662 dev_err(dev, "Initialization of sub crqs failed\n"); 4663 release_crq_queue(adapter); 4664 return rc; 4665 } 4666 4667 rc = init_sub_crq_irqs(adapter); 4668 if (rc) { 4669 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4670 release_crq_queue(adapter); 4671 } 4672 4673 return rc; 4674 } 4675 4676 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4677 { 4678 struct device *dev = &adapter->vdev->dev; 4679 unsigned long timeout = msecs_to_jiffies(30000); 4680 int rc; 4681 4682 adapter->from_passive_init = false; 4683 4684 init_completion(&adapter->init_done); 4685 adapter->init_done_rc = 0; 4686 ibmvnic_send_crq_init(adapter); 4687 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4688 dev_err(dev, "Initialization sequence timed out\n"); 4689 return -1; 4690 } 4691 4692 if (adapter->init_done_rc) { 4693 release_crq_queue(adapter); 4694 return adapter->init_done_rc; 4695 } 4696 4697 if (adapter->from_passive_init) { 4698 adapter->state = VNIC_OPEN; 4699 adapter->from_passive_init = false; 4700 return -1; 4701 } 4702 4703 rc = init_sub_crqs(adapter); 4704 if (rc) { 4705 dev_err(dev, "Initialization of sub crqs failed\n"); 4706 release_crq_queue(adapter); 4707 return rc; 4708 } 4709 4710 rc = init_sub_crq_irqs(adapter); 4711 if (rc) { 4712 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4713 release_crq_queue(adapter); 4714 } 4715 4716 return rc; 4717 } 4718 4719 static struct device_attribute dev_attr_failover; 4720 4721 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4722 { 4723 struct ibmvnic_adapter *adapter; 4724 struct net_device *netdev; 4725 unsigned char *mac_addr_p; 4726 int rc; 4727 4728 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4729 dev->unit_address); 4730 4731 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4732 VETH_MAC_ADDR, NULL); 4733 if (!mac_addr_p) { 4734 dev_err(&dev->dev, 4735 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4736 __FILE__, __LINE__); 4737 return 0; 4738 } 4739 4740 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4741 IBMVNIC_MAX_QUEUES); 4742 if (!netdev) 4743 return -ENOMEM; 4744 4745 adapter = netdev_priv(netdev); 4746 adapter->state = VNIC_PROBING; 4747 dev_set_drvdata(&dev->dev, netdev); 4748 adapter->vdev = dev; 4749 adapter->netdev = netdev; 4750 4751 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4752 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4753 netdev->irq = dev->irq; 4754 netdev->netdev_ops = &ibmvnic_netdev_ops; 4755 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4756 SET_NETDEV_DEV(netdev, &dev->dev); 4757 4758 spin_lock_init(&adapter->stats_lock); 4759 4760 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4761 INIT_LIST_HEAD(&adapter->rwi_list); 4762 mutex_init(&adapter->rwi_lock); 4763 adapter->resetting = false; 4764 4765 adapter->mac_change_pending = false; 4766 4767 do { 4768 rc = init_crq_queue(adapter); 4769 if (rc) { 4770 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4771 rc); 4772 goto ibmvnic_init_fail; 4773 } 4774 4775 rc = ibmvnic_init(adapter); 4776 if (rc && rc != EAGAIN) 4777 goto ibmvnic_init_fail; 4778 } while (rc == EAGAIN); 4779 4780 rc = init_stats_buffers(adapter); 4781 if (rc) 4782 goto ibmvnic_init_fail; 4783 4784 rc = init_stats_token(adapter); 4785 if (rc) 4786 goto ibmvnic_stats_fail; 4787 4788 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4789 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4790 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4791 4792 rc = device_create_file(&dev->dev, &dev_attr_failover); 4793 if (rc) 4794 goto ibmvnic_dev_file_err; 4795 4796 netif_carrier_off(netdev); 4797 rc = register_netdev(netdev); 4798 if (rc) { 4799 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4800 goto ibmvnic_register_fail; 4801 } 4802 dev_info(&dev->dev, "ibmvnic registered\n"); 4803 4804 adapter->state = VNIC_PROBED; 4805 4806 adapter->wait_for_reset = false; 4807 4808 return 0; 4809 4810 ibmvnic_register_fail: 4811 device_remove_file(&dev->dev, &dev_attr_failover); 4812 4813 ibmvnic_dev_file_err: 4814 release_stats_token(adapter); 4815 4816 ibmvnic_stats_fail: 4817 release_stats_buffers(adapter); 4818 4819 ibmvnic_init_fail: 4820 release_sub_crqs(adapter, 1); 4821 release_crq_queue(adapter); 4822 free_netdev(netdev); 4823 4824 return rc; 4825 } 4826 4827 static int ibmvnic_remove(struct vio_dev *dev) 4828 { 4829 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4830 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4831 4832 adapter->state = VNIC_REMOVING; 4833 rtnl_lock(); 4834 unregister_netdevice(netdev); 4835 4836 release_resources(adapter); 4837 release_sub_crqs(adapter, 1); 4838 release_crq_queue(adapter); 4839 4840 release_stats_token(adapter); 4841 release_stats_buffers(adapter); 4842 4843 adapter->state = VNIC_REMOVED; 4844 4845 rtnl_unlock(); 4846 device_remove_file(&dev->dev, &dev_attr_failover); 4847 free_netdev(netdev); 4848 dev_set_drvdata(&dev->dev, NULL); 4849 4850 return 0; 4851 } 4852 4853 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4854 const char *buf, size_t count) 4855 { 4856 struct net_device *netdev = dev_get_drvdata(dev); 4857 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4858 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4859 __be64 session_token; 4860 long rc; 4861 4862 if (!sysfs_streq(buf, "1")) 4863 return -EINVAL; 4864 4865 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4866 H_GET_SESSION_TOKEN, 0, 0, 0); 4867 if (rc) { 4868 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4869 rc); 4870 return -EINVAL; 4871 } 4872 4873 session_token = (__be64)retbuf[0]; 4874 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4875 be64_to_cpu(session_token)); 4876 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4877 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4878 if (rc) { 4879 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4880 rc); 4881 return -EINVAL; 4882 } 4883 4884 return count; 4885 } 4886 4887 static DEVICE_ATTR_WO(failover); 4888 4889 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4890 { 4891 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4892 struct ibmvnic_adapter *adapter; 4893 struct iommu_table *tbl; 4894 unsigned long ret = 0; 4895 int i; 4896 4897 tbl = get_iommu_table_base(&vdev->dev); 4898 4899 /* netdev inits at probe time along with the structures we need below*/ 4900 if (!netdev) 4901 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4902 4903 adapter = netdev_priv(netdev); 4904 4905 ret += PAGE_SIZE; /* the crq message queue */ 4906 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4907 4908 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4909 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4910 4911 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4912 i++) 4913 ret += adapter->rx_pool[i].size * 4914 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4915 4916 return ret; 4917 } 4918 4919 static int ibmvnic_resume(struct device *dev) 4920 { 4921 struct net_device *netdev = dev_get_drvdata(dev); 4922 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4923 4924 if (adapter->state != VNIC_OPEN) 4925 return 0; 4926 4927 tasklet_schedule(&adapter->tasklet); 4928 4929 return 0; 4930 } 4931 4932 static const struct vio_device_id ibmvnic_device_table[] = { 4933 {"network", "IBM,vnic"}, 4934 {"", "" } 4935 }; 4936 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4937 4938 static const struct dev_pm_ops ibmvnic_pm_ops = { 4939 .resume = ibmvnic_resume 4940 }; 4941 4942 static struct vio_driver ibmvnic_driver = { 4943 .id_table = ibmvnic_device_table, 4944 .probe = ibmvnic_probe, 4945 .remove = ibmvnic_remove, 4946 .get_desired_dma = ibmvnic_get_desired_dma, 4947 .name = ibmvnic_driver_name, 4948 .pm = &ibmvnic_pm_ops, 4949 }; 4950 4951 /* module functions */ 4952 static int __init ibmvnic_module_init(void) 4953 { 4954 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4955 IBMVNIC_DRIVER_VERSION); 4956 4957 return vio_register_driver(&ibmvnic_driver); 4958 } 4959 4960 static void __exit ibmvnic_module_exit(void) 4961 { 4962 vio_unregister_driver(&ibmvnic_driver); 4963 } 4964 4965 module_init(ibmvnic_module_init); 4966 module_exit(ibmvnic_module_exit); 4967