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