1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static int send_request_unmap(struct ibmvnic_adapter *, u8); 114 static int send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 120 static void release_crq_queue(struct ibmvnic_adapter *); 121 static int __ibmvnic_set_mac(struct net_device *, u8 *); 122 static int init_crq_queue(struct ibmvnic_adapter *adapter); 123 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 124 125 struct ibmvnic_stat { 126 char name[ETH_GSTRING_LEN]; 127 int offset; 128 }; 129 130 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 131 offsetof(struct ibmvnic_statistics, stat)) 132 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 133 134 static const struct ibmvnic_stat ibmvnic_stats[] = { 135 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 136 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 137 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 138 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 139 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 140 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 141 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 142 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 143 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 144 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 145 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 146 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 147 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 148 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 149 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 150 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 151 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 152 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 153 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 154 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 155 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 156 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 157 }; 158 159 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 160 unsigned long length, unsigned long *number, 161 unsigned long *irq) 162 { 163 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 164 long rc; 165 166 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 167 *number = retbuf[0]; 168 *irq = retbuf[1]; 169 170 return rc; 171 } 172 173 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 174 struct ibmvnic_long_term_buff *ltb, int size) 175 { 176 struct device *dev = &adapter->vdev->dev; 177 int rc; 178 179 ltb->size = size; 180 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 181 GFP_KERNEL); 182 183 if (!ltb->buff) { 184 dev_err(dev, "Couldn't alloc long term buffer\n"); 185 return -ENOMEM; 186 } 187 ltb->map_id = adapter->map_id; 188 adapter->map_id++; 189 190 init_completion(&adapter->fw_done); 191 rc = send_request_map(adapter, ltb->addr, 192 ltb->size, ltb->map_id); 193 if (rc) { 194 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 195 return rc; 196 } 197 wait_for_completion(&adapter->fw_done); 198 199 if (adapter->fw_done_rc) { 200 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 201 adapter->fw_done_rc); 202 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 203 return -1; 204 } 205 return 0; 206 } 207 208 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 209 struct ibmvnic_long_term_buff *ltb) 210 { 211 struct device *dev = &adapter->vdev->dev; 212 213 if (!ltb->buff) 214 return; 215 216 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 217 adapter->reset_reason != VNIC_RESET_MOBILITY) 218 send_request_unmap(adapter, ltb->map_id); 219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 220 } 221 222 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 223 struct ibmvnic_long_term_buff *ltb) 224 { 225 int rc; 226 227 memset(ltb->buff, 0, ltb->size); 228 229 init_completion(&adapter->fw_done); 230 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 231 if (rc) 232 return rc; 233 wait_for_completion(&adapter->fw_done); 234 235 if (adapter->fw_done_rc) { 236 dev_info(&adapter->vdev->dev, 237 "Reset failed, attempting to free and reallocate buffer\n"); 238 free_long_term_buff(adapter, ltb); 239 return alloc_long_term_buff(adapter, ltb, ltb->size); 240 } 241 return 0; 242 } 243 244 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 245 { 246 int i; 247 248 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 249 i++) 250 adapter->rx_pool[i].active = 0; 251 } 252 253 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 254 struct ibmvnic_rx_pool *pool) 255 { 256 int count = pool->size - atomic_read(&pool->available); 257 struct device *dev = &adapter->vdev->dev; 258 int buffers_added = 0; 259 unsigned long lpar_rc; 260 union sub_crq sub_crq; 261 struct sk_buff *skb; 262 unsigned int offset; 263 dma_addr_t dma_addr; 264 unsigned char *dst; 265 u64 *handle_array; 266 int shift = 0; 267 int index; 268 int i; 269 270 if (!pool->active) 271 return; 272 273 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 274 be32_to_cpu(adapter->login_rsp_buf-> 275 off_rxadd_subcrqs)); 276 277 for (i = 0; i < count; ++i) { 278 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 279 if (!skb) { 280 dev_err(dev, "Couldn't replenish rx buff\n"); 281 adapter->replenish_no_mem++; 282 break; 283 } 284 285 index = pool->free_map[pool->next_free]; 286 287 if (pool->rx_buff[index].skb) 288 dev_err(dev, "Inconsistent free_map!\n"); 289 290 /* Copy the skb to the long term mapped DMA buffer */ 291 offset = index * pool->buff_size; 292 dst = pool->long_term_buff.buff + offset; 293 memset(dst, 0, pool->buff_size); 294 dma_addr = pool->long_term_buff.addr + offset; 295 pool->rx_buff[index].data = dst; 296 297 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 298 pool->rx_buff[index].dma = dma_addr; 299 pool->rx_buff[index].skb = skb; 300 pool->rx_buff[index].pool_index = pool->index; 301 pool->rx_buff[index].size = pool->buff_size; 302 303 memset(&sub_crq, 0, sizeof(sub_crq)); 304 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 305 sub_crq.rx_add.correlator = 306 cpu_to_be64((u64)&pool->rx_buff[index]); 307 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 308 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 309 310 /* The length field of the sCRQ is defined to be 24 bits so the 311 * buffer size needs to be left shifted by a byte before it is 312 * converted to big endian to prevent the last byte from being 313 * truncated. 314 */ 315 #ifdef __LITTLE_ENDIAN__ 316 shift = 8; 317 #endif 318 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 319 320 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 321 &sub_crq); 322 if (lpar_rc != H_SUCCESS) 323 goto failure; 324 325 buffers_added++; 326 adapter->replenish_add_buff_success++; 327 pool->next_free = (pool->next_free + 1) % pool->size; 328 } 329 atomic_add(buffers_added, &pool->available); 330 return; 331 332 failure: 333 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 334 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 335 pool->free_map[pool->next_free] = index; 336 pool->rx_buff[index].skb = NULL; 337 338 dev_kfree_skb_any(skb); 339 adapter->replenish_add_buff_failure++; 340 atomic_add(buffers_added, &pool->available); 341 342 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 343 /* Disable buffer pool replenishment and report carrier off if 344 * queue is closed or pending failover. 345 * Firmware guarantees that a signal will be sent to the 346 * driver, triggering a reset. 347 */ 348 deactivate_rx_pools(adapter); 349 netif_carrier_off(adapter->netdev); 350 } 351 } 352 353 static void replenish_pools(struct ibmvnic_adapter *adapter) 354 { 355 int i; 356 357 adapter->replenish_task_cycles++; 358 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 359 i++) { 360 if (adapter->rx_pool[i].active) 361 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 362 } 363 } 364 365 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 366 { 367 kfree(adapter->tx_stats_buffers); 368 kfree(adapter->rx_stats_buffers); 369 adapter->tx_stats_buffers = NULL; 370 adapter->rx_stats_buffers = NULL; 371 } 372 373 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 374 { 375 adapter->tx_stats_buffers = 376 kcalloc(IBMVNIC_MAX_QUEUES, 377 sizeof(struct ibmvnic_tx_queue_stats), 378 GFP_KERNEL); 379 if (!adapter->tx_stats_buffers) 380 return -ENOMEM; 381 382 adapter->rx_stats_buffers = 383 kcalloc(IBMVNIC_MAX_QUEUES, 384 sizeof(struct ibmvnic_rx_queue_stats), 385 GFP_KERNEL); 386 if (!adapter->rx_stats_buffers) 387 return -ENOMEM; 388 389 return 0; 390 } 391 392 static void release_stats_token(struct ibmvnic_adapter *adapter) 393 { 394 struct device *dev = &adapter->vdev->dev; 395 396 if (!adapter->stats_token) 397 return; 398 399 dma_unmap_single(dev, adapter->stats_token, 400 sizeof(struct ibmvnic_statistics), 401 DMA_FROM_DEVICE); 402 adapter->stats_token = 0; 403 } 404 405 static int init_stats_token(struct ibmvnic_adapter *adapter) 406 { 407 struct device *dev = &adapter->vdev->dev; 408 dma_addr_t stok; 409 410 stok = dma_map_single(dev, &adapter->stats, 411 sizeof(struct ibmvnic_statistics), 412 DMA_FROM_DEVICE); 413 if (dma_mapping_error(dev, stok)) { 414 dev_err(dev, "Couldn't map stats buffer\n"); 415 return -1; 416 } 417 418 adapter->stats_token = stok; 419 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 420 return 0; 421 } 422 423 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 424 { 425 struct ibmvnic_rx_pool *rx_pool; 426 int rx_scrqs; 427 int i, j, rc; 428 u64 *size_array; 429 430 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 431 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 432 433 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 434 for (i = 0; i < rx_scrqs; i++) { 435 rx_pool = &adapter->rx_pool[i]; 436 437 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 438 439 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 440 free_long_term_buff(adapter, &rx_pool->long_term_buff); 441 rx_pool->buff_size = be64_to_cpu(size_array[i]); 442 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 443 rx_pool->size * 444 rx_pool->buff_size); 445 } else { 446 rc = reset_long_term_buff(adapter, 447 &rx_pool->long_term_buff); 448 } 449 450 if (rc) 451 return rc; 452 453 for (j = 0; j < rx_pool->size; j++) 454 rx_pool->free_map[j] = j; 455 456 memset(rx_pool->rx_buff, 0, 457 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 458 459 atomic_set(&rx_pool->available, 0); 460 rx_pool->next_alloc = 0; 461 rx_pool->next_free = 0; 462 rx_pool->active = 1; 463 } 464 465 return 0; 466 } 467 468 static void release_rx_pools(struct ibmvnic_adapter *adapter) 469 { 470 struct ibmvnic_rx_pool *rx_pool; 471 int i, j; 472 473 if (!adapter->rx_pool) 474 return; 475 476 for (i = 0; i < adapter->num_active_rx_pools; i++) { 477 rx_pool = &adapter->rx_pool[i]; 478 479 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 480 481 kfree(rx_pool->free_map); 482 free_long_term_buff(adapter, &rx_pool->long_term_buff); 483 484 if (!rx_pool->rx_buff) 485 continue; 486 487 for (j = 0; j < rx_pool->size; j++) { 488 if (rx_pool->rx_buff[j].skb) { 489 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 490 rx_pool->rx_buff[j].skb = NULL; 491 } 492 } 493 494 kfree(rx_pool->rx_buff); 495 } 496 497 kfree(adapter->rx_pool); 498 adapter->rx_pool = NULL; 499 adapter->num_active_rx_pools = 0; 500 } 501 502 static int init_rx_pools(struct net_device *netdev) 503 { 504 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 505 struct device *dev = &adapter->vdev->dev; 506 struct ibmvnic_rx_pool *rx_pool; 507 int rxadd_subcrqs; 508 u64 *size_array; 509 int i, j; 510 511 rxadd_subcrqs = 512 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 513 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 514 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 515 516 adapter->rx_pool = kcalloc(rxadd_subcrqs, 517 sizeof(struct ibmvnic_rx_pool), 518 GFP_KERNEL); 519 if (!adapter->rx_pool) { 520 dev_err(dev, "Failed to allocate rx pools\n"); 521 return -1; 522 } 523 524 adapter->num_active_rx_pools = rxadd_subcrqs; 525 526 for (i = 0; i < rxadd_subcrqs; i++) { 527 rx_pool = &adapter->rx_pool[i]; 528 529 netdev_dbg(adapter->netdev, 530 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 531 i, adapter->req_rx_add_entries_per_subcrq, 532 be64_to_cpu(size_array[i])); 533 534 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 535 rx_pool->index = i; 536 rx_pool->buff_size = be64_to_cpu(size_array[i]); 537 rx_pool->active = 1; 538 539 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 540 GFP_KERNEL); 541 if (!rx_pool->free_map) { 542 release_rx_pools(adapter); 543 return -1; 544 } 545 546 rx_pool->rx_buff = kcalloc(rx_pool->size, 547 sizeof(struct ibmvnic_rx_buff), 548 GFP_KERNEL); 549 if (!rx_pool->rx_buff) { 550 dev_err(dev, "Couldn't alloc rx buffers\n"); 551 release_rx_pools(adapter); 552 return -1; 553 } 554 555 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 556 rx_pool->size * rx_pool->buff_size)) { 557 release_rx_pools(adapter); 558 return -1; 559 } 560 561 for (j = 0; j < rx_pool->size; ++j) 562 rx_pool->free_map[j] = j; 563 564 atomic_set(&rx_pool->available, 0); 565 rx_pool->next_alloc = 0; 566 rx_pool->next_free = 0; 567 } 568 569 return 0; 570 } 571 572 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 573 struct ibmvnic_tx_pool *tx_pool) 574 { 575 int rc, i; 576 577 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 578 if (rc) 579 return rc; 580 581 memset(tx_pool->tx_buff, 0, 582 tx_pool->num_buffers * 583 sizeof(struct ibmvnic_tx_buff)); 584 585 for (i = 0; i < tx_pool->num_buffers; i++) 586 tx_pool->free_map[i] = i; 587 588 tx_pool->consumer_index = 0; 589 tx_pool->producer_index = 0; 590 591 return 0; 592 } 593 594 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 595 { 596 int tx_scrqs; 597 int i, rc; 598 599 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 600 for (i = 0; i < tx_scrqs; i++) { 601 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 602 if (rc) 603 return rc; 604 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 605 if (rc) 606 return rc; 607 } 608 609 return 0; 610 } 611 612 static void release_vpd_data(struct ibmvnic_adapter *adapter) 613 { 614 if (!adapter->vpd) 615 return; 616 617 kfree(adapter->vpd->buff); 618 kfree(adapter->vpd); 619 620 adapter->vpd = NULL; 621 } 622 623 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 624 struct ibmvnic_tx_pool *tx_pool) 625 { 626 kfree(tx_pool->tx_buff); 627 kfree(tx_pool->free_map); 628 free_long_term_buff(adapter, &tx_pool->long_term_buff); 629 } 630 631 static void release_tx_pools(struct ibmvnic_adapter *adapter) 632 { 633 int i; 634 635 if (!adapter->tx_pool) 636 return; 637 638 for (i = 0; i < adapter->num_active_tx_pools; i++) { 639 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 640 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 641 } 642 643 kfree(adapter->tx_pool); 644 adapter->tx_pool = NULL; 645 kfree(adapter->tso_pool); 646 adapter->tso_pool = NULL; 647 adapter->num_active_tx_pools = 0; 648 } 649 650 static int init_one_tx_pool(struct net_device *netdev, 651 struct ibmvnic_tx_pool *tx_pool, 652 int num_entries, int buf_size) 653 { 654 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 655 int i; 656 657 tx_pool->tx_buff = kcalloc(num_entries, 658 sizeof(struct ibmvnic_tx_buff), 659 GFP_KERNEL); 660 if (!tx_pool->tx_buff) 661 return -1; 662 663 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 664 num_entries * buf_size)) 665 return -1; 666 667 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 668 if (!tx_pool->free_map) 669 return -1; 670 671 for (i = 0; i < num_entries; i++) 672 tx_pool->free_map[i] = i; 673 674 tx_pool->consumer_index = 0; 675 tx_pool->producer_index = 0; 676 tx_pool->num_buffers = num_entries; 677 tx_pool->buf_size = buf_size; 678 679 return 0; 680 } 681 682 static int init_tx_pools(struct net_device *netdev) 683 { 684 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 685 int tx_subcrqs; 686 int i, rc; 687 688 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 689 adapter->tx_pool = kcalloc(tx_subcrqs, 690 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 691 if (!adapter->tx_pool) 692 return -1; 693 694 adapter->tso_pool = kcalloc(tx_subcrqs, 695 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 696 if (!adapter->tso_pool) 697 return -1; 698 699 adapter->num_active_tx_pools = tx_subcrqs; 700 701 for (i = 0; i < tx_subcrqs; i++) { 702 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 703 adapter->req_tx_entries_per_subcrq, 704 adapter->req_mtu + VLAN_HLEN); 705 if (rc) { 706 release_tx_pools(adapter); 707 return rc; 708 } 709 710 init_one_tx_pool(netdev, &adapter->tso_pool[i], 711 IBMVNIC_TSO_BUFS, 712 IBMVNIC_TSO_BUF_SZ); 713 if (rc) { 714 release_tx_pools(adapter); 715 return rc; 716 } 717 } 718 719 return 0; 720 } 721 722 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 723 { 724 int i; 725 726 if (adapter->napi_enabled) 727 return; 728 729 for (i = 0; i < adapter->req_rx_queues; i++) 730 napi_enable(&adapter->napi[i]); 731 732 adapter->napi_enabled = true; 733 } 734 735 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 736 { 737 int i; 738 739 if (!adapter->napi_enabled) 740 return; 741 742 for (i = 0; i < adapter->req_rx_queues; i++) { 743 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 744 napi_disable(&adapter->napi[i]); 745 } 746 747 adapter->napi_enabled = false; 748 } 749 750 static int init_napi(struct ibmvnic_adapter *adapter) 751 { 752 int i; 753 754 adapter->napi = kcalloc(adapter->req_rx_queues, 755 sizeof(struct napi_struct), GFP_KERNEL); 756 if (!adapter->napi) 757 return -ENOMEM; 758 759 for (i = 0; i < adapter->req_rx_queues; i++) { 760 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 761 netif_napi_add(adapter->netdev, &adapter->napi[i], 762 ibmvnic_poll, NAPI_POLL_WEIGHT); 763 } 764 765 adapter->num_active_rx_napi = adapter->req_rx_queues; 766 return 0; 767 } 768 769 static void release_napi(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (!adapter->napi) 774 return; 775 776 for (i = 0; i < adapter->num_active_rx_napi; i++) { 777 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 778 netif_napi_del(&adapter->napi[i]); 779 } 780 781 kfree(adapter->napi); 782 adapter->napi = NULL; 783 adapter->num_active_rx_napi = 0; 784 adapter->napi_enabled = false; 785 } 786 787 static int ibmvnic_login(struct net_device *netdev) 788 { 789 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 790 unsigned long timeout = msecs_to_jiffies(30000); 791 int retry_count = 0; 792 bool retry; 793 int rc; 794 795 do { 796 retry = false; 797 if (retry_count > IBMVNIC_MAX_QUEUES) { 798 netdev_warn(netdev, "Login attempts exceeded\n"); 799 return -1; 800 } 801 802 adapter->init_done_rc = 0; 803 reinit_completion(&adapter->init_done); 804 rc = send_login(adapter); 805 if (rc) { 806 netdev_warn(netdev, "Unable to login\n"); 807 return rc; 808 } 809 810 if (!wait_for_completion_timeout(&adapter->init_done, 811 timeout)) { 812 netdev_warn(netdev, "Login timed out\n"); 813 return -1; 814 } 815 816 if (adapter->init_done_rc == PARTIALSUCCESS) { 817 retry_count++; 818 release_sub_crqs(adapter, 1); 819 820 retry = true; 821 netdev_dbg(netdev, 822 "Received partial success, retrying...\n"); 823 adapter->init_done_rc = 0; 824 reinit_completion(&adapter->init_done); 825 send_cap_queries(adapter); 826 if (!wait_for_completion_timeout(&adapter->init_done, 827 timeout)) { 828 netdev_warn(netdev, 829 "Capabilities query timed out\n"); 830 return -1; 831 } 832 833 rc = init_sub_crqs(adapter); 834 if (rc) { 835 netdev_warn(netdev, 836 "SCRQ initialization failed\n"); 837 return -1; 838 } 839 840 rc = init_sub_crq_irqs(adapter); 841 if (rc) { 842 netdev_warn(netdev, 843 "SCRQ irq initialization failed\n"); 844 return -1; 845 } 846 } else if (adapter->init_done_rc) { 847 netdev_warn(netdev, "Adapter login failed\n"); 848 return -1; 849 } 850 } while (retry); 851 852 __ibmvnic_set_mac(netdev, adapter->mac_addr); 853 854 return 0; 855 } 856 857 static void release_login_buffer(struct ibmvnic_adapter *adapter) 858 { 859 kfree(adapter->login_buf); 860 adapter->login_buf = NULL; 861 } 862 863 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 864 { 865 kfree(adapter->login_rsp_buf); 866 adapter->login_rsp_buf = NULL; 867 } 868 869 static void release_resources(struct ibmvnic_adapter *adapter) 870 { 871 release_vpd_data(adapter); 872 873 release_tx_pools(adapter); 874 release_rx_pools(adapter); 875 876 release_napi(adapter); 877 release_login_rsp_buffer(adapter); 878 } 879 880 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 881 { 882 struct net_device *netdev = adapter->netdev; 883 unsigned long timeout = msecs_to_jiffies(30000); 884 union ibmvnic_crq crq; 885 bool resend; 886 int rc; 887 888 netdev_dbg(netdev, "setting link state %d\n", link_state); 889 890 memset(&crq, 0, sizeof(crq)); 891 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 892 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 893 crq.logical_link_state.link_state = link_state; 894 895 do { 896 resend = false; 897 898 reinit_completion(&adapter->init_done); 899 rc = ibmvnic_send_crq(adapter, &crq); 900 if (rc) { 901 netdev_err(netdev, "Failed to set link state\n"); 902 return rc; 903 } 904 905 if (!wait_for_completion_timeout(&adapter->init_done, 906 timeout)) { 907 netdev_err(netdev, "timeout setting link state\n"); 908 return -1; 909 } 910 911 if (adapter->init_done_rc == 1) { 912 /* Partuial success, delay and re-send */ 913 mdelay(1000); 914 resend = true; 915 } else if (adapter->init_done_rc) { 916 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 917 adapter->init_done_rc); 918 return adapter->init_done_rc; 919 } 920 } while (resend); 921 922 return 0; 923 } 924 925 static int set_real_num_queues(struct net_device *netdev) 926 { 927 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 928 int rc; 929 930 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 931 adapter->req_tx_queues, adapter->req_rx_queues); 932 933 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 934 if (rc) { 935 netdev_err(netdev, "failed to set the number of tx queues\n"); 936 return rc; 937 } 938 939 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 940 if (rc) 941 netdev_err(netdev, "failed to set the number of rx queues\n"); 942 943 return rc; 944 } 945 946 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 947 { 948 struct device *dev = &adapter->vdev->dev; 949 union ibmvnic_crq crq; 950 int len = 0; 951 int rc; 952 953 if (adapter->vpd->buff) 954 len = adapter->vpd->len; 955 956 init_completion(&adapter->fw_done); 957 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 958 crq.get_vpd_size.cmd = GET_VPD_SIZE; 959 rc = ibmvnic_send_crq(adapter, &crq); 960 if (rc) 961 return rc; 962 wait_for_completion(&adapter->fw_done); 963 964 if (!adapter->vpd->len) 965 return -ENODATA; 966 967 if (!adapter->vpd->buff) 968 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 969 else if (adapter->vpd->len != len) 970 adapter->vpd->buff = 971 krealloc(adapter->vpd->buff, 972 adapter->vpd->len, GFP_KERNEL); 973 974 if (!adapter->vpd->buff) { 975 dev_err(dev, "Could allocate VPD buffer\n"); 976 return -ENOMEM; 977 } 978 979 adapter->vpd->dma_addr = 980 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 981 DMA_FROM_DEVICE); 982 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 983 dev_err(dev, "Could not map VPD buffer\n"); 984 kfree(adapter->vpd->buff); 985 adapter->vpd->buff = NULL; 986 return -ENOMEM; 987 } 988 989 reinit_completion(&adapter->fw_done); 990 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 991 crq.get_vpd.cmd = GET_VPD; 992 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 993 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 994 rc = ibmvnic_send_crq(adapter, &crq); 995 if (rc) { 996 kfree(adapter->vpd->buff); 997 adapter->vpd->buff = NULL; 998 return rc; 999 } 1000 wait_for_completion(&adapter->fw_done); 1001 1002 return 0; 1003 } 1004 1005 static int init_resources(struct ibmvnic_adapter *adapter) 1006 { 1007 struct net_device *netdev = adapter->netdev; 1008 int rc; 1009 1010 rc = set_real_num_queues(netdev); 1011 if (rc) 1012 return rc; 1013 1014 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1015 if (!adapter->vpd) 1016 return -ENOMEM; 1017 1018 /* Vital Product Data (VPD) */ 1019 rc = ibmvnic_get_vpd(adapter); 1020 if (rc) { 1021 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1022 return rc; 1023 } 1024 1025 adapter->map_id = 1; 1026 1027 rc = init_napi(adapter); 1028 if (rc) 1029 return rc; 1030 1031 send_map_query(adapter); 1032 1033 rc = init_rx_pools(netdev); 1034 if (rc) 1035 return rc; 1036 1037 rc = init_tx_pools(netdev); 1038 return rc; 1039 } 1040 1041 static int __ibmvnic_open(struct net_device *netdev) 1042 { 1043 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1044 enum vnic_state prev_state = adapter->state; 1045 int i, rc; 1046 1047 adapter->state = VNIC_OPENING; 1048 replenish_pools(adapter); 1049 ibmvnic_napi_enable(adapter); 1050 1051 /* We're ready to receive frames, enable the sub-crq interrupts and 1052 * set the logical link state to up 1053 */ 1054 for (i = 0; i < adapter->req_rx_queues; i++) { 1055 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1056 if (prev_state == VNIC_CLOSED) 1057 enable_irq(adapter->rx_scrq[i]->irq); 1058 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1059 } 1060 1061 for (i = 0; i < adapter->req_tx_queues; i++) { 1062 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1063 if (prev_state == VNIC_CLOSED) 1064 enable_irq(adapter->tx_scrq[i]->irq); 1065 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1066 } 1067 1068 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1069 if (rc) { 1070 for (i = 0; i < adapter->req_rx_queues; i++) 1071 napi_disable(&adapter->napi[i]); 1072 release_resources(adapter); 1073 return rc; 1074 } 1075 1076 netif_tx_start_all_queues(netdev); 1077 1078 if (prev_state == VNIC_CLOSED) { 1079 for (i = 0; i < adapter->req_rx_queues; i++) 1080 napi_schedule(&adapter->napi[i]); 1081 } 1082 1083 adapter->state = VNIC_OPEN; 1084 return rc; 1085 } 1086 1087 static int ibmvnic_open(struct net_device *netdev) 1088 { 1089 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1090 int rc; 1091 1092 /* If device failover is pending, just set device state and return. 1093 * Device operation will be handled by reset routine. 1094 */ 1095 if (adapter->failover_pending) { 1096 adapter->state = VNIC_OPEN; 1097 return 0; 1098 } 1099 1100 if (adapter->state != VNIC_CLOSED) { 1101 rc = ibmvnic_login(netdev); 1102 if (rc) 1103 return rc; 1104 1105 rc = init_resources(adapter); 1106 if (rc) { 1107 netdev_err(netdev, "failed to initialize resources\n"); 1108 release_resources(adapter); 1109 return rc; 1110 } 1111 } 1112 1113 rc = __ibmvnic_open(netdev); 1114 1115 return rc; 1116 } 1117 1118 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1119 { 1120 struct ibmvnic_rx_pool *rx_pool; 1121 struct ibmvnic_rx_buff *rx_buff; 1122 u64 rx_entries; 1123 int rx_scrqs; 1124 int i, j; 1125 1126 if (!adapter->rx_pool) 1127 return; 1128 1129 rx_scrqs = adapter->num_active_rx_pools; 1130 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1131 1132 /* Free any remaining skbs in the rx buffer pools */ 1133 for (i = 0; i < rx_scrqs; i++) { 1134 rx_pool = &adapter->rx_pool[i]; 1135 if (!rx_pool || !rx_pool->rx_buff) 1136 continue; 1137 1138 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1139 for (j = 0; j < rx_entries; j++) { 1140 rx_buff = &rx_pool->rx_buff[j]; 1141 if (rx_buff && rx_buff->skb) { 1142 dev_kfree_skb_any(rx_buff->skb); 1143 rx_buff->skb = NULL; 1144 } 1145 } 1146 } 1147 } 1148 1149 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1150 struct ibmvnic_tx_pool *tx_pool) 1151 { 1152 struct ibmvnic_tx_buff *tx_buff; 1153 u64 tx_entries; 1154 int i; 1155 1156 if (!tx_pool || !tx_pool->tx_buff) 1157 return; 1158 1159 tx_entries = tx_pool->num_buffers; 1160 1161 for (i = 0; i < tx_entries; i++) { 1162 tx_buff = &tx_pool->tx_buff[i]; 1163 if (tx_buff && tx_buff->skb) { 1164 dev_kfree_skb_any(tx_buff->skb); 1165 tx_buff->skb = NULL; 1166 } 1167 } 1168 } 1169 1170 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1171 { 1172 int tx_scrqs; 1173 int i; 1174 1175 if (!adapter->tx_pool || !adapter->tso_pool) 1176 return; 1177 1178 tx_scrqs = adapter->num_active_tx_pools; 1179 1180 /* Free any remaining skbs in the tx buffer pools */ 1181 for (i = 0; i < tx_scrqs; i++) { 1182 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1183 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1184 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1185 } 1186 } 1187 1188 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1189 { 1190 struct net_device *netdev = adapter->netdev; 1191 int i; 1192 1193 if (adapter->tx_scrq) { 1194 for (i = 0; i < adapter->req_tx_queues; i++) 1195 if (adapter->tx_scrq[i]->irq) { 1196 netdev_dbg(netdev, 1197 "Disabling tx_scrq[%d] irq\n", i); 1198 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1199 disable_irq(adapter->tx_scrq[i]->irq); 1200 } 1201 } 1202 1203 if (adapter->rx_scrq) { 1204 for (i = 0; i < adapter->req_rx_queues; i++) { 1205 if (adapter->rx_scrq[i]->irq) { 1206 netdev_dbg(netdev, 1207 "Disabling rx_scrq[%d] irq\n", i); 1208 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1209 disable_irq(adapter->rx_scrq[i]->irq); 1210 } 1211 } 1212 } 1213 } 1214 1215 static void ibmvnic_cleanup(struct net_device *netdev) 1216 { 1217 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1218 1219 /* ensure that transmissions are stopped if called by do_reset */ 1220 if (adapter->resetting) 1221 netif_tx_disable(netdev); 1222 else 1223 netif_tx_stop_all_queues(netdev); 1224 1225 ibmvnic_napi_disable(adapter); 1226 ibmvnic_disable_irqs(adapter); 1227 1228 clean_rx_pools(adapter); 1229 clean_tx_pools(adapter); 1230 } 1231 1232 static int __ibmvnic_close(struct net_device *netdev) 1233 { 1234 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1235 int rc = 0; 1236 1237 adapter->state = VNIC_CLOSING; 1238 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1239 if (rc) 1240 return rc; 1241 adapter->state = VNIC_CLOSED; 1242 return 0; 1243 } 1244 1245 static int ibmvnic_close(struct net_device *netdev) 1246 { 1247 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1248 int rc; 1249 1250 /* If device failover is pending, just set device state and return. 1251 * Device operation will be handled by reset routine. 1252 */ 1253 if (adapter->failover_pending) { 1254 adapter->state = VNIC_CLOSED; 1255 return 0; 1256 } 1257 1258 rc = __ibmvnic_close(netdev); 1259 ibmvnic_cleanup(netdev); 1260 1261 return rc; 1262 } 1263 1264 /** 1265 * build_hdr_data - creates L2/L3/L4 header data buffer 1266 * @hdr_field - bitfield determining needed headers 1267 * @skb - socket buffer 1268 * @hdr_len - array of header lengths 1269 * @tot_len - total length of data 1270 * 1271 * Reads hdr_field to determine which headers are needed by firmware. 1272 * Builds a buffer containing these headers. Saves individual header 1273 * lengths and total buffer length to be used to build descriptors. 1274 */ 1275 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1276 int *hdr_len, u8 *hdr_data) 1277 { 1278 int len = 0; 1279 u8 *hdr; 1280 1281 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1282 hdr_len[0] = sizeof(struct vlan_ethhdr); 1283 else 1284 hdr_len[0] = sizeof(struct ethhdr); 1285 1286 if (skb->protocol == htons(ETH_P_IP)) { 1287 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1288 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1289 hdr_len[2] = tcp_hdrlen(skb); 1290 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1291 hdr_len[2] = sizeof(struct udphdr); 1292 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1293 hdr_len[1] = sizeof(struct ipv6hdr); 1294 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1295 hdr_len[2] = tcp_hdrlen(skb); 1296 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1297 hdr_len[2] = sizeof(struct udphdr); 1298 } else if (skb->protocol == htons(ETH_P_ARP)) { 1299 hdr_len[1] = arp_hdr_len(skb->dev); 1300 hdr_len[2] = 0; 1301 } 1302 1303 memset(hdr_data, 0, 120); 1304 if ((hdr_field >> 6) & 1) { 1305 hdr = skb_mac_header(skb); 1306 memcpy(hdr_data, hdr, hdr_len[0]); 1307 len += hdr_len[0]; 1308 } 1309 1310 if ((hdr_field >> 5) & 1) { 1311 hdr = skb_network_header(skb); 1312 memcpy(hdr_data + len, hdr, hdr_len[1]); 1313 len += hdr_len[1]; 1314 } 1315 1316 if ((hdr_field >> 4) & 1) { 1317 hdr = skb_transport_header(skb); 1318 memcpy(hdr_data + len, hdr, hdr_len[2]); 1319 len += hdr_len[2]; 1320 } 1321 return len; 1322 } 1323 1324 /** 1325 * create_hdr_descs - create header and header extension descriptors 1326 * @hdr_field - bitfield determining needed headers 1327 * @data - buffer containing header data 1328 * @len - length of data buffer 1329 * @hdr_len - array of individual header lengths 1330 * @scrq_arr - descriptor array 1331 * 1332 * Creates header and, if needed, header extension descriptors and 1333 * places them in a descriptor array, scrq_arr 1334 */ 1335 1336 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1337 union sub_crq *scrq_arr) 1338 { 1339 union sub_crq hdr_desc; 1340 int tmp_len = len; 1341 int num_descs = 0; 1342 u8 *data, *cur; 1343 int tmp; 1344 1345 while (tmp_len > 0) { 1346 cur = hdr_data + len - tmp_len; 1347 1348 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1349 if (cur != hdr_data) { 1350 data = hdr_desc.hdr_ext.data; 1351 tmp = tmp_len > 29 ? 29 : tmp_len; 1352 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1353 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1354 hdr_desc.hdr_ext.len = tmp; 1355 } else { 1356 data = hdr_desc.hdr.data; 1357 tmp = tmp_len > 24 ? 24 : tmp_len; 1358 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1359 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1360 hdr_desc.hdr.len = tmp; 1361 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1362 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1363 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1364 hdr_desc.hdr.flag = hdr_field << 1; 1365 } 1366 memcpy(data, cur, tmp); 1367 tmp_len -= tmp; 1368 *scrq_arr = hdr_desc; 1369 scrq_arr++; 1370 num_descs++; 1371 } 1372 1373 return num_descs; 1374 } 1375 1376 /** 1377 * build_hdr_descs_arr - build a header descriptor array 1378 * @skb - socket buffer 1379 * @num_entries - number of descriptors to be sent 1380 * @subcrq - first TX descriptor 1381 * @hdr_field - bit field determining which headers will be sent 1382 * 1383 * This function will build a TX descriptor array with applicable 1384 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1385 */ 1386 1387 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1388 int *num_entries, u8 hdr_field) 1389 { 1390 int hdr_len[3] = {0, 0, 0}; 1391 int tot_len; 1392 u8 *hdr_data = txbuff->hdr_data; 1393 1394 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1395 txbuff->hdr_data); 1396 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1397 txbuff->indir_arr + 1); 1398 } 1399 1400 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1401 struct net_device *netdev) 1402 { 1403 /* For some backing devices, mishandling of small packets 1404 * can result in a loss of connection or TX stall. Device 1405 * architects recommend that no packet should be smaller 1406 * than the minimum MTU value provided to the driver, so 1407 * pad any packets to that length 1408 */ 1409 if (skb->len < netdev->min_mtu) 1410 return skb_put_padto(skb, netdev->min_mtu); 1411 1412 return 0; 1413 } 1414 1415 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1416 { 1417 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1418 int queue_num = skb_get_queue_mapping(skb); 1419 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1420 struct device *dev = &adapter->vdev->dev; 1421 struct ibmvnic_tx_buff *tx_buff = NULL; 1422 struct ibmvnic_sub_crq_queue *tx_scrq; 1423 struct ibmvnic_tx_pool *tx_pool; 1424 unsigned int tx_send_failed = 0; 1425 unsigned int tx_map_failed = 0; 1426 unsigned int tx_dropped = 0; 1427 unsigned int tx_packets = 0; 1428 unsigned int tx_bytes = 0; 1429 dma_addr_t data_dma_addr; 1430 struct netdev_queue *txq; 1431 unsigned long lpar_rc; 1432 union sub_crq tx_crq; 1433 unsigned int offset; 1434 int num_entries = 1; 1435 unsigned char *dst; 1436 u64 *handle_array; 1437 int index = 0; 1438 u8 proto = 0; 1439 netdev_tx_t ret = NETDEV_TX_OK; 1440 1441 if (adapter->resetting) { 1442 if (!netif_subqueue_stopped(netdev, skb)) 1443 netif_stop_subqueue(netdev, queue_num); 1444 dev_kfree_skb_any(skb); 1445 1446 tx_send_failed++; 1447 tx_dropped++; 1448 ret = NETDEV_TX_OK; 1449 goto out; 1450 } 1451 1452 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1453 tx_dropped++; 1454 tx_send_failed++; 1455 ret = NETDEV_TX_OK; 1456 goto out; 1457 } 1458 if (skb_is_gso(skb)) 1459 tx_pool = &adapter->tso_pool[queue_num]; 1460 else 1461 tx_pool = &adapter->tx_pool[queue_num]; 1462 1463 tx_scrq = adapter->tx_scrq[queue_num]; 1464 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1465 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1466 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1467 1468 index = tx_pool->free_map[tx_pool->consumer_index]; 1469 1470 if (index == IBMVNIC_INVALID_MAP) { 1471 dev_kfree_skb_any(skb); 1472 tx_send_failed++; 1473 tx_dropped++; 1474 ret = NETDEV_TX_OK; 1475 goto out; 1476 } 1477 1478 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1479 1480 offset = index * tx_pool->buf_size; 1481 dst = tx_pool->long_term_buff.buff + offset; 1482 memset(dst, 0, tx_pool->buf_size); 1483 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1484 1485 if (skb_shinfo(skb)->nr_frags) { 1486 int cur, i; 1487 1488 /* Copy the head */ 1489 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1490 cur = skb_headlen(skb); 1491 1492 /* Copy the frags */ 1493 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1494 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1495 1496 memcpy(dst + cur, 1497 page_address(skb_frag_page(frag)) + 1498 frag->page_offset, skb_frag_size(frag)); 1499 cur += skb_frag_size(frag); 1500 } 1501 } else { 1502 skb_copy_from_linear_data(skb, dst, skb->len); 1503 } 1504 1505 tx_pool->consumer_index = 1506 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1507 1508 tx_buff = &tx_pool->tx_buff[index]; 1509 tx_buff->skb = skb; 1510 tx_buff->data_dma[0] = data_dma_addr; 1511 tx_buff->data_len[0] = skb->len; 1512 tx_buff->index = index; 1513 tx_buff->pool_index = queue_num; 1514 tx_buff->last_frag = true; 1515 1516 memset(&tx_crq, 0, sizeof(tx_crq)); 1517 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1518 tx_crq.v1.type = IBMVNIC_TX_DESC; 1519 tx_crq.v1.n_crq_elem = 1; 1520 tx_crq.v1.n_sge = 1; 1521 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1522 1523 if (skb_is_gso(skb)) 1524 tx_crq.v1.correlator = 1525 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1526 else 1527 tx_crq.v1.correlator = cpu_to_be32(index); 1528 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1529 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1530 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1531 1532 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1533 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1534 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1535 } 1536 1537 if (skb->protocol == htons(ETH_P_IP)) { 1538 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1539 proto = ip_hdr(skb)->protocol; 1540 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1541 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1542 proto = ipv6_hdr(skb)->nexthdr; 1543 } 1544 1545 if (proto == IPPROTO_TCP) 1546 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1547 else if (proto == IPPROTO_UDP) 1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1549 1550 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1551 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1552 hdrs += 2; 1553 } 1554 if (skb_is_gso(skb)) { 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1556 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1557 hdrs += 2; 1558 } 1559 /* determine if l2/3/4 headers are sent to firmware */ 1560 if ((*hdrs >> 7) & 1) { 1561 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1562 tx_crq.v1.n_crq_elem = num_entries; 1563 tx_buff->num_entries = num_entries; 1564 tx_buff->indir_arr[0] = tx_crq; 1565 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1566 sizeof(tx_buff->indir_arr), 1567 DMA_TO_DEVICE); 1568 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1569 dev_kfree_skb_any(skb); 1570 tx_buff->skb = NULL; 1571 if (!firmware_has_feature(FW_FEATURE_CMO)) 1572 dev_err(dev, "tx: unable to map descriptor array\n"); 1573 tx_map_failed++; 1574 tx_dropped++; 1575 ret = NETDEV_TX_OK; 1576 goto tx_err_out; 1577 } 1578 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1579 (u64)tx_buff->indir_dma, 1580 (u64)num_entries); 1581 } else { 1582 tx_buff->num_entries = num_entries; 1583 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1584 &tx_crq); 1585 } 1586 if (lpar_rc != H_SUCCESS) { 1587 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1588 dev_err_ratelimited(dev, "tx: send failed\n"); 1589 dev_kfree_skb_any(skb); 1590 tx_buff->skb = NULL; 1591 1592 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1593 /* Disable TX and report carrier off if queue is closed 1594 * or pending failover. 1595 * Firmware guarantees that a signal will be sent to the 1596 * driver, triggering a reset or some other action. 1597 */ 1598 netif_tx_stop_all_queues(netdev); 1599 netif_carrier_off(netdev); 1600 } 1601 1602 tx_send_failed++; 1603 tx_dropped++; 1604 ret = NETDEV_TX_OK; 1605 goto tx_err_out; 1606 } 1607 1608 if (atomic_add_return(num_entries, &tx_scrq->used) 1609 >= adapter->req_tx_entries_per_subcrq) { 1610 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1611 netif_stop_subqueue(netdev, queue_num); 1612 } 1613 1614 tx_packets++; 1615 tx_bytes += skb->len; 1616 txq->trans_start = jiffies; 1617 ret = NETDEV_TX_OK; 1618 goto out; 1619 1620 tx_err_out: 1621 /* roll back consumer index and map array*/ 1622 if (tx_pool->consumer_index == 0) 1623 tx_pool->consumer_index = 1624 tx_pool->num_buffers - 1; 1625 else 1626 tx_pool->consumer_index--; 1627 tx_pool->free_map[tx_pool->consumer_index] = index; 1628 out: 1629 netdev->stats.tx_dropped += tx_dropped; 1630 netdev->stats.tx_bytes += tx_bytes; 1631 netdev->stats.tx_packets += tx_packets; 1632 adapter->tx_send_failed += tx_send_failed; 1633 adapter->tx_map_failed += tx_map_failed; 1634 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1635 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1636 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1637 1638 return ret; 1639 } 1640 1641 static void ibmvnic_set_multi(struct net_device *netdev) 1642 { 1643 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1644 struct netdev_hw_addr *ha; 1645 union ibmvnic_crq crq; 1646 1647 memset(&crq, 0, sizeof(crq)); 1648 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1649 crq.request_capability.cmd = REQUEST_CAPABILITY; 1650 1651 if (netdev->flags & IFF_PROMISC) { 1652 if (!adapter->promisc_supported) 1653 return; 1654 } else { 1655 if (netdev->flags & IFF_ALLMULTI) { 1656 /* Accept all multicast */ 1657 memset(&crq, 0, sizeof(crq)); 1658 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1659 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1660 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1661 ibmvnic_send_crq(adapter, &crq); 1662 } else if (netdev_mc_empty(netdev)) { 1663 /* Reject all multicast */ 1664 memset(&crq, 0, sizeof(crq)); 1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1667 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1668 ibmvnic_send_crq(adapter, &crq); 1669 } else { 1670 /* Accept one or more multicast(s) */ 1671 netdev_for_each_mc_addr(ha, netdev) { 1672 memset(&crq, 0, sizeof(crq)); 1673 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1674 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1675 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1676 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1677 ha->addr); 1678 ibmvnic_send_crq(adapter, &crq); 1679 } 1680 } 1681 } 1682 } 1683 1684 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1685 { 1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1687 union ibmvnic_crq crq; 1688 int rc; 1689 1690 if (!is_valid_ether_addr(dev_addr)) { 1691 rc = -EADDRNOTAVAIL; 1692 goto err; 1693 } 1694 1695 memset(&crq, 0, sizeof(crq)); 1696 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1697 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1698 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1699 1700 init_completion(&adapter->fw_done); 1701 rc = ibmvnic_send_crq(adapter, &crq); 1702 if (rc) { 1703 rc = -EIO; 1704 goto err; 1705 } 1706 1707 wait_for_completion(&adapter->fw_done); 1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1709 if (adapter->fw_done_rc) { 1710 rc = -EIO; 1711 goto err; 1712 } 1713 1714 return 0; 1715 err: 1716 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1717 return rc; 1718 } 1719 1720 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1721 { 1722 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1723 struct sockaddr *addr = p; 1724 int rc; 1725 1726 rc = 0; 1727 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1728 if (adapter->state != VNIC_PROBED) 1729 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1730 1731 return rc; 1732 } 1733 1734 /** 1735 * do_reset returns zero if we are able to keep processing reset events, or 1736 * non-zero if we hit a fatal error and must halt. 1737 */ 1738 static int do_reset(struct ibmvnic_adapter *adapter, 1739 struct ibmvnic_rwi *rwi, u32 reset_state) 1740 { 1741 u64 old_num_rx_queues, old_num_tx_queues; 1742 u64 old_num_rx_slots, old_num_tx_slots; 1743 struct net_device *netdev = adapter->netdev; 1744 int i, rc; 1745 1746 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1747 rwi->reset_reason); 1748 1749 netif_carrier_off(netdev); 1750 adapter->reset_reason = rwi->reset_reason; 1751 1752 old_num_rx_queues = adapter->req_rx_queues; 1753 old_num_tx_queues = adapter->req_tx_queues; 1754 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1755 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1756 1757 ibmvnic_cleanup(netdev); 1758 1759 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1760 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1761 rc = __ibmvnic_close(netdev); 1762 if (rc) 1763 return rc; 1764 } 1765 1766 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1767 adapter->wait_for_reset) { 1768 release_resources(adapter); 1769 release_sub_crqs(adapter, 1); 1770 release_crq_queue(adapter); 1771 } 1772 1773 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1774 /* remove the closed state so when we call open it appears 1775 * we are coming from the probed state. 1776 */ 1777 adapter->state = VNIC_PROBED; 1778 1779 if (adapter->wait_for_reset) { 1780 rc = init_crq_queue(adapter); 1781 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1782 rc = ibmvnic_reenable_crq_queue(adapter); 1783 release_sub_crqs(adapter, 1); 1784 } else { 1785 rc = ibmvnic_reset_crq(adapter); 1786 if (!rc) 1787 rc = vio_enable_interrupts(adapter->vdev); 1788 } 1789 1790 if (rc) { 1791 netdev_err(adapter->netdev, 1792 "Couldn't initialize crq. rc=%d\n", rc); 1793 return rc; 1794 } 1795 1796 rc = ibmvnic_reset_init(adapter); 1797 if (rc) 1798 return IBMVNIC_INIT_FAILED; 1799 1800 /* If the adapter was in PROBE state prior to the reset, 1801 * exit here. 1802 */ 1803 if (reset_state == VNIC_PROBED) 1804 return 0; 1805 1806 rc = ibmvnic_login(netdev); 1807 if (rc) { 1808 adapter->state = reset_state; 1809 return rc; 1810 } 1811 1812 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1813 adapter->wait_for_reset) { 1814 rc = init_resources(adapter); 1815 if (rc) 1816 return rc; 1817 } else if (adapter->req_rx_queues != old_num_rx_queues || 1818 adapter->req_tx_queues != old_num_tx_queues || 1819 adapter->req_rx_add_entries_per_subcrq != 1820 old_num_rx_slots || 1821 adapter->req_tx_entries_per_subcrq != 1822 old_num_tx_slots) { 1823 release_rx_pools(adapter); 1824 release_tx_pools(adapter); 1825 release_napi(adapter); 1826 release_vpd_data(adapter); 1827 1828 rc = init_resources(adapter); 1829 if (rc) 1830 return rc; 1831 1832 } else { 1833 rc = reset_tx_pools(adapter); 1834 if (rc) 1835 return rc; 1836 1837 rc = reset_rx_pools(adapter); 1838 if (rc) 1839 return rc; 1840 } 1841 ibmvnic_disable_irqs(adapter); 1842 } 1843 adapter->state = VNIC_CLOSED; 1844 1845 if (reset_state == VNIC_CLOSED) 1846 return 0; 1847 1848 rc = __ibmvnic_open(netdev); 1849 if (rc) { 1850 if (list_empty(&adapter->rwi_list)) 1851 adapter->state = VNIC_CLOSED; 1852 else 1853 adapter->state = reset_state; 1854 1855 return 0; 1856 } 1857 1858 /* kick napi */ 1859 for (i = 0; i < adapter->req_rx_queues; i++) 1860 napi_schedule(&adapter->napi[i]); 1861 1862 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1863 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1864 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1865 1866 return 0; 1867 } 1868 1869 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1870 struct ibmvnic_rwi *rwi, u32 reset_state) 1871 { 1872 struct net_device *netdev = adapter->netdev; 1873 int rc; 1874 1875 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1876 rwi->reset_reason); 1877 1878 netif_carrier_off(netdev); 1879 adapter->reset_reason = rwi->reset_reason; 1880 1881 ibmvnic_cleanup(netdev); 1882 release_resources(adapter); 1883 release_sub_crqs(adapter, 0); 1884 release_crq_queue(adapter); 1885 1886 /* remove the closed state so when we call open it appears 1887 * we are coming from the probed state. 1888 */ 1889 adapter->state = VNIC_PROBED; 1890 1891 reinit_completion(&adapter->init_done); 1892 rc = init_crq_queue(adapter); 1893 if (rc) { 1894 netdev_err(adapter->netdev, 1895 "Couldn't initialize crq. rc=%d\n", rc); 1896 return rc; 1897 } 1898 1899 rc = ibmvnic_init(adapter); 1900 if (rc) 1901 return rc; 1902 1903 /* If the adapter was in PROBE state prior to the reset, 1904 * exit here. 1905 */ 1906 if (reset_state == VNIC_PROBED) 1907 return 0; 1908 1909 rc = ibmvnic_login(netdev); 1910 if (rc) { 1911 adapter->state = VNIC_PROBED; 1912 return 0; 1913 } 1914 1915 rc = init_resources(adapter); 1916 if (rc) 1917 return rc; 1918 1919 ibmvnic_disable_irqs(adapter); 1920 adapter->state = VNIC_CLOSED; 1921 1922 if (reset_state == VNIC_CLOSED) 1923 return 0; 1924 1925 rc = __ibmvnic_open(netdev); 1926 if (rc) { 1927 if (list_empty(&adapter->rwi_list)) 1928 adapter->state = VNIC_CLOSED; 1929 else 1930 adapter->state = reset_state; 1931 1932 return 0; 1933 } 1934 1935 return 0; 1936 } 1937 1938 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1939 { 1940 struct ibmvnic_rwi *rwi; 1941 unsigned long flags; 1942 1943 spin_lock_irqsave(&adapter->rwi_lock, flags); 1944 1945 if (!list_empty(&adapter->rwi_list)) { 1946 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1947 list); 1948 list_del(&rwi->list); 1949 } else { 1950 rwi = NULL; 1951 } 1952 1953 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 1954 return rwi; 1955 } 1956 1957 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1958 { 1959 struct ibmvnic_rwi *rwi; 1960 1961 rwi = get_next_rwi(adapter); 1962 while (rwi) { 1963 kfree(rwi); 1964 rwi = get_next_rwi(adapter); 1965 } 1966 } 1967 1968 static void __ibmvnic_reset(struct work_struct *work) 1969 { 1970 struct ibmvnic_rwi *rwi; 1971 struct ibmvnic_adapter *adapter; 1972 bool we_lock_rtnl = false; 1973 u32 reset_state; 1974 int rc = 0; 1975 1976 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1977 1978 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1979 * unless wait_for_reset is set, in which case the rtnl lock 1980 * has already been taken before initializing the reset 1981 */ 1982 if (!adapter->wait_for_reset) { 1983 rtnl_lock(); 1984 we_lock_rtnl = true; 1985 } 1986 reset_state = adapter->state; 1987 1988 rwi = get_next_rwi(adapter); 1989 while (rwi) { 1990 if (adapter->force_reset_recovery) { 1991 adapter->force_reset_recovery = false; 1992 rc = do_hard_reset(adapter, rwi, reset_state); 1993 } else { 1994 rc = do_reset(adapter, rwi, reset_state); 1995 } 1996 kfree(rwi); 1997 if (rc && rc != IBMVNIC_INIT_FAILED && 1998 !adapter->force_reset_recovery) 1999 break; 2000 2001 rwi = get_next_rwi(adapter); 2002 } 2003 2004 if (adapter->wait_for_reset) { 2005 adapter->wait_for_reset = false; 2006 adapter->reset_done_rc = rc; 2007 complete(&adapter->reset_done); 2008 } 2009 2010 if (rc) { 2011 netdev_dbg(adapter->netdev, "Reset failed\n"); 2012 free_all_rwi(adapter); 2013 } 2014 2015 adapter->resetting = false; 2016 if (we_lock_rtnl) 2017 rtnl_unlock(); 2018 } 2019 2020 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2021 enum ibmvnic_reset_reason reason) 2022 { 2023 struct list_head *entry, *tmp_entry; 2024 struct ibmvnic_rwi *rwi, *tmp; 2025 struct net_device *netdev = adapter->netdev; 2026 unsigned long flags; 2027 int ret; 2028 2029 if (adapter->state == VNIC_REMOVING || 2030 adapter->state == VNIC_REMOVED || 2031 adapter->failover_pending) { 2032 ret = EBUSY; 2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2034 goto err; 2035 } 2036 2037 if (adapter->state == VNIC_PROBING) { 2038 netdev_warn(netdev, "Adapter reset during probe\n"); 2039 ret = adapter->init_done_rc = EAGAIN; 2040 goto err; 2041 } 2042 2043 spin_lock_irqsave(&adapter->rwi_lock, flags); 2044 2045 list_for_each(entry, &adapter->rwi_list) { 2046 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2047 if (tmp->reset_reason == reason) { 2048 netdev_dbg(netdev, "Skipping matching reset\n"); 2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2050 ret = EBUSY; 2051 goto err; 2052 } 2053 } 2054 2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2056 if (!rwi) { 2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2058 ibmvnic_close(netdev); 2059 ret = ENOMEM; 2060 goto err; 2061 } 2062 /* if we just received a transport event, 2063 * flush reset queue and process this reset 2064 */ 2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2067 list_del(entry); 2068 } 2069 rwi->reset_reason = reason; 2070 list_add_tail(&rwi->list, &adapter->rwi_list); 2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2072 adapter->resetting = true; 2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2074 schedule_work(&adapter->ibmvnic_reset); 2075 2076 return 0; 2077 err: 2078 if (adapter->wait_for_reset) 2079 adapter->wait_for_reset = false; 2080 return -ret; 2081 } 2082 2083 static void ibmvnic_tx_timeout(struct net_device *dev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2086 2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2088 } 2089 2090 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2091 struct ibmvnic_rx_buff *rx_buff) 2092 { 2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2094 2095 rx_buff->skb = NULL; 2096 2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2099 2100 atomic_dec(&pool->available); 2101 } 2102 2103 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2104 { 2105 struct net_device *netdev = napi->dev; 2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2107 int scrq_num = (int)(napi - adapter->napi); 2108 int frames_processed = 0; 2109 2110 restart_poll: 2111 while (frames_processed < budget) { 2112 struct sk_buff *skb; 2113 struct ibmvnic_rx_buff *rx_buff; 2114 union sub_crq *next; 2115 u32 length; 2116 u16 offset; 2117 u8 flags = 0; 2118 2119 if (unlikely(adapter->resetting && 2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2122 napi_complete_done(napi, frames_processed); 2123 return frames_processed; 2124 } 2125 2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2127 break; 2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2129 rx_buff = 2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2131 rx_comp.correlator); 2132 /* do error checking */ 2133 if (next->rx_comp.rc) { 2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2135 be16_to_cpu(next->rx_comp.rc)); 2136 /* free the entry */ 2137 next->rx_comp.first = 0; 2138 dev_kfree_skb_any(rx_buff->skb); 2139 remove_buff_from_pool(adapter, rx_buff); 2140 continue; 2141 } else if (!rx_buff->skb) { 2142 /* free the entry */ 2143 next->rx_comp.first = 0; 2144 remove_buff_from_pool(adapter, rx_buff); 2145 continue; 2146 } 2147 2148 length = be32_to_cpu(next->rx_comp.len); 2149 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2150 flags = next->rx_comp.flags; 2151 skb = rx_buff->skb; 2152 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2153 length); 2154 2155 /* VLAN Header has been stripped by the system firmware and 2156 * needs to be inserted by the driver 2157 */ 2158 if (adapter->rx_vlan_header_insertion && 2159 (flags & IBMVNIC_VLAN_STRIPPED)) 2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2161 ntohs(next->rx_comp.vlan_tci)); 2162 2163 /* free the entry */ 2164 next->rx_comp.first = 0; 2165 remove_buff_from_pool(adapter, rx_buff); 2166 2167 skb_put(skb, length); 2168 skb->protocol = eth_type_trans(skb, netdev); 2169 skb_record_rx_queue(skb, scrq_num); 2170 2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2173 skb->ip_summed = CHECKSUM_UNNECESSARY; 2174 } 2175 2176 length = skb->len; 2177 napi_gro_receive(napi, skb); /* send it up */ 2178 netdev->stats.rx_packets++; 2179 netdev->stats.rx_bytes += length; 2180 adapter->rx_stats_buffers[scrq_num].packets++; 2181 adapter->rx_stats_buffers[scrq_num].bytes += length; 2182 frames_processed++; 2183 } 2184 2185 if (adapter->state != VNIC_CLOSING) 2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2187 2188 if (frames_processed < budget) { 2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2190 napi_complete_done(napi, frames_processed); 2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2192 napi_reschedule(napi)) { 2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2194 goto restart_poll; 2195 } 2196 } 2197 return frames_processed; 2198 } 2199 2200 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2201 { 2202 int rc, ret; 2203 2204 adapter->fallback.mtu = adapter->req_mtu; 2205 adapter->fallback.rx_queues = adapter->req_rx_queues; 2206 adapter->fallback.tx_queues = adapter->req_tx_queues; 2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2209 2210 init_completion(&adapter->reset_done); 2211 adapter->wait_for_reset = true; 2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2213 if (rc) 2214 return rc; 2215 wait_for_completion(&adapter->reset_done); 2216 2217 ret = 0; 2218 if (adapter->reset_done_rc) { 2219 ret = -EIO; 2220 adapter->desired.mtu = adapter->fallback.mtu; 2221 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2222 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2223 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2224 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2225 2226 init_completion(&adapter->reset_done); 2227 adapter->wait_for_reset = true; 2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2229 if (rc) 2230 return ret; 2231 wait_for_completion(&adapter->reset_done); 2232 } 2233 adapter->wait_for_reset = false; 2234 2235 return ret; 2236 } 2237 2238 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2239 { 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2241 2242 adapter->desired.mtu = new_mtu + ETH_HLEN; 2243 2244 return wait_for_reset(adapter); 2245 } 2246 2247 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2248 struct net_device *dev, 2249 netdev_features_t features) 2250 { 2251 /* Some backing hardware adapters can not 2252 * handle packets with a MSS less than 224 2253 * or with only one segment. 2254 */ 2255 if (skb_is_gso(skb)) { 2256 if (skb_shinfo(skb)->gso_size < 224 || 2257 skb_shinfo(skb)->gso_segs == 1) 2258 features &= ~NETIF_F_GSO_MASK; 2259 } 2260 2261 return features; 2262 } 2263 2264 static const struct net_device_ops ibmvnic_netdev_ops = { 2265 .ndo_open = ibmvnic_open, 2266 .ndo_stop = ibmvnic_close, 2267 .ndo_start_xmit = ibmvnic_xmit, 2268 .ndo_set_rx_mode = ibmvnic_set_multi, 2269 .ndo_set_mac_address = ibmvnic_set_mac, 2270 .ndo_validate_addr = eth_validate_addr, 2271 .ndo_tx_timeout = ibmvnic_tx_timeout, 2272 .ndo_change_mtu = ibmvnic_change_mtu, 2273 .ndo_features_check = ibmvnic_features_check, 2274 }; 2275 2276 /* ethtool functions */ 2277 2278 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2279 struct ethtool_link_ksettings *cmd) 2280 { 2281 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2282 int rc; 2283 2284 rc = send_query_phys_parms(adapter); 2285 if (rc) { 2286 adapter->speed = SPEED_UNKNOWN; 2287 adapter->duplex = DUPLEX_UNKNOWN; 2288 } 2289 cmd->base.speed = adapter->speed; 2290 cmd->base.duplex = adapter->duplex; 2291 cmd->base.port = PORT_FIBRE; 2292 cmd->base.phy_address = 0; 2293 cmd->base.autoneg = AUTONEG_ENABLE; 2294 2295 return 0; 2296 } 2297 2298 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2299 struct ethtool_drvinfo *info) 2300 { 2301 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2302 2303 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2304 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2305 strlcpy(info->fw_version, adapter->fw_version, 2306 sizeof(info->fw_version)); 2307 } 2308 2309 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2310 { 2311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2312 2313 return adapter->msg_enable; 2314 } 2315 2316 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2317 { 2318 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2319 2320 adapter->msg_enable = data; 2321 } 2322 2323 static u32 ibmvnic_get_link(struct net_device *netdev) 2324 { 2325 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2326 2327 /* Don't need to send a query because we request a logical link up at 2328 * init and then we wait for link state indications 2329 */ 2330 return adapter->logical_link_state; 2331 } 2332 2333 static void ibmvnic_get_ringparam(struct net_device *netdev, 2334 struct ethtool_ringparam *ring) 2335 { 2336 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2337 2338 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2339 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2340 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2341 } else { 2342 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2343 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2344 } 2345 ring->rx_mini_max_pending = 0; 2346 ring->rx_jumbo_max_pending = 0; 2347 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2348 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2349 ring->rx_mini_pending = 0; 2350 ring->rx_jumbo_pending = 0; 2351 } 2352 2353 static int ibmvnic_set_ringparam(struct net_device *netdev, 2354 struct ethtool_ringparam *ring) 2355 { 2356 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2357 int ret; 2358 2359 ret = 0; 2360 adapter->desired.rx_entries = ring->rx_pending; 2361 adapter->desired.tx_entries = ring->tx_pending; 2362 2363 ret = wait_for_reset(adapter); 2364 2365 if (!ret && 2366 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2367 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2368 netdev_info(netdev, 2369 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2370 ring->rx_pending, ring->tx_pending, 2371 adapter->req_rx_add_entries_per_subcrq, 2372 adapter->req_tx_entries_per_subcrq); 2373 return ret; 2374 } 2375 2376 static void ibmvnic_get_channels(struct net_device *netdev, 2377 struct ethtool_channels *channels) 2378 { 2379 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2380 2381 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2382 channels->max_rx = adapter->max_rx_queues; 2383 channels->max_tx = adapter->max_tx_queues; 2384 } else { 2385 channels->max_rx = IBMVNIC_MAX_QUEUES; 2386 channels->max_tx = IBMVNIC_MAX_QUEUES; 2387 } 2388 2389 channels->max_other = 0; 2390 channels->max_combined = 0; 2391 channels->rx_count = adapter->req_rx_queues; 2392 channels->tx_count = adapter->req_tx_queues; 2393 channels->other_count = 0; 2394 channels->combined_count = 0; 2395 } 2396 2397 static int ibmvnic_set_channels(struct net_device *netdev, 2398 struct ethtool_channels *channels) 2399 { 2400 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2401 int ret; 2402 2403 ret = 0; 2404 adapter->desired.rx_queues = channels->rx_count; 2405 adapter->desired.tx_queues = channels->tx_count; 2406 2407 ret = wait_for_reset(adapter); 2408 2409 if (!ret && 2410 (adapter->req_rx_queues != channels->rx_count || 2411 adapter->req_tx_queues != channels->tx_count)) 2412 netdev_info(netdev, 2413 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2414 channels->rx_count, channels->tx_count, 2415 adapter->req_rx_queues, adapter->req_tx_queues); 2416 return ret; 2417 2418 } 2419 2420 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2421 { 2422 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2423 int i; 2424 2425 switch (stringset) { 2426 case ETH_SS_STATS: 2427 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2428 i++, data += ETH_GSTRING_LEN) 2429 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2430 2431 for (i = 0; i < adapter->req_tx_queues; i++) { 2432 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2433 data += ETH_GSTRING_LEN; 2434 2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2436 data += ETH_GSTRING_LEN; 2437 2438 snprintf(data, ETH_GSTRING_LEN, 2439 "tx%d_dropped_packets", i); 2440 data += ETH_GSTRING_LEN; 2441 } 2442 2443 for (i = 0; i < adapter->req_rx_queues; i++) { 2444 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2445 data += ETH_GSTRING_LEN; 2446 2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2448 data += ETH_GSTRING_LEN; 2449 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2451 data += ETH_GSTRING_LEN; 2452 } 2453 break; 2454 2455 case ETH_SS_PRIV_FLAGS: 2456 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2457 strcpy(data + i * ETH_GSTRING_LEN, 2458 ibmvnic_priv_flags[i]); 2459 break; 2460 default: 2461 return; 2462 } 2463 } 2464 2465 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2466 { 2467 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2468 2469 switch (sset) { 2470 case ETH_SS_STATS: 2471 return ARRAY_SIZE(ibmvnic_stats) + 2472 adapter->req_tx_queues * NUM_TX_STATS + 2473 adapter->req_rx_queues * NUM_RX_STATS; 2474 case ETH_SS_PRIV_FLAGS: 2475 return ARRAY_SIZE(ibmvnic_priv_flags); 2476 default: 2477 return -EOPNOTSUPP; 2478 } 2479 } 2480 2481 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2482 struct ethtool_stats *stats, u64 *data) 2483 { 2484 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2485 union ibmvnic_crq crq; 2486 int i, j; 2487 int rc; 2488 2489 memset(&crq, 0, sizeof(crq)); 2490 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2491 crq.request_statistics.cmd = REQUEST_STATISTICS; 2492 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2493 crq.request_statistics.len = 2494 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2495 2496 /* Wait for data to be written */ 2497 init_completion(&adapter->stats_done); 2498 rc = ibmvnic_send_crq(adapter, &crq); 2499 if (rc) 2500 return; 2501 wait_for_completion(&adapter->stats_done); 2502 2503 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2504 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2505 ibmvnic_stats[i].offset)); 2506 2507 for (j = 0; j < adapter->req_tx_queues; j++) { 2508 data[i] = adapter->tx_stats_buffers[j].packets; 2509 i++; 2510 data[i] = adapter->tx_stats_buffers[j].bytes; 2511 i++; 2512 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2513 i++; 2514 } 2515 2516 for (j = 0; j < adapter->req_rx_queues; j++) { 2517 data[i] = adapter->rx_stats_buffers[j].packets; 2518 i++; 2519 data[i] = adapter->rx_stats_buffers[j].bytes; 2520 i++; 2521 data[i] = adapter->rx_stats_buffers[j].interrupts; 2522 i++; 2523 } 2524 } 2525 2526 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2527 { 2528 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2529 2530 return adapter->priv_flags; 2531 } 2532 2533 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2534 { 2535 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2536 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2537 2538 if (which_maxes) 2539 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2540 else 2541 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2542 2543 return 0; 2544 } 2545 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2546 .get_drvinfo = ibmvnic_get_drvinfo, 2547 .get_msglevel = ibmvnic_get_msglevel, 2548 .set_msglevel = ibmvnic_set_msglevel, 2549 .get_link = ibmvnic_get_link, 2550 .get_ringparam = ibmvnic_get_ringparam, 2551 .set_ringparam = ibmvnic_set_ringparam, 2552 .get_channels = ibmvnic_get_channels, 2553 .set_channels = ibmvnic_set_channels, 2554 .get_strings = ibmvnic_get_strings, 2555 .get_sset_count = ibmvnic_get_sset_count, 2556 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2557 .get_link_ksettings = ibmvnic_get_link_ksettings, 2558 .get_priv_flags = ibmvnic_get_priv_flags, 2559 .set_priv_flags = ibmvnic_set_priv_flags, 2560 }; 2561 2562 /* Routines for managing CRQs/sCRQs */ 2563 2564 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2565 struct ibmvnic_sub_crq_queue *scrq) 2566 { 2567 int rc; 2568 2569 if (scrq->irq) { 2570 free_irq(scrq->irq, scrq); 2571 irq_dispose_mapping(scrq->irq); 2572 scrq->irq = 0; 2573 } 2574 2575 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2576 atomic_set(&scrq->used, 0); 2577 scrq->cur = 0; 2578 2579 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2580 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2581 return rc; 2582 } 2583 2584 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2585 { 2586 int i, rc; 2587 2588 for (i = 0; i < adapter->req_tx_queues; i++) { 2589 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2590 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2591 if (rc) 2592 return rc; 2593 } 2594 2595 for (i = 0; i < adapter->req_rx_queues; i++) { 2596 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2597 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2598 if (rc) 2599 return rc; 2600 } 2601 2602 return rc; 2603 } 2604 2605 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2606 struct ibmvnic_sub_crq_queue *scrq, 2607 bool do_h_free) 2608 { 2609 struct device *dev = &adapter->vdev->dev; 2610 long rc; 2611 2612 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2613 2614 if (do_h_free) { 2615 /* Close the sub-crqs */ 2616 do { 2617 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2618 adapter->vdev->unit_address, 2619 scrq->crq_num); 2620 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2621 2622 if (rc) { 2623 netdev_err(adapter->netdev, 2624 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2625 scrq->crq_num, rc); 2626 } 2627 } 2628 2629 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2630 DMA_BIDIRECTIONAL); 2631 free_pages((unsigned long)scrq->msgs, 2); 2632 kfree(scrq); 2633 } 2634 2635 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2636 *adapter) 2637 { 2638 struct device *dev = &adapter->vdev->dev; 2639 struct ibmvnic_sub_crq_queue *scrq; 2640 int rc; 2641 2642 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2643 if (!scrq) 2644 return NULL; 2645 2646 scrq->msgs = 2647 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2648 if (!scrq->msgs) { 2649 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2650 goto zero_page_failed; 2651 } 2652 2653 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2654 DMA_BIDIRECTIONAL); 2655 if (dma_mapping_error(dev, scrq->msg_token)) { 2656 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2657 goto map_failed; 2658 } 2659 2660 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2661 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2662 2663 if (rc == H_RESOURCE) 2664 rc = ibmvnic_reset_crq(adapter); 2665 2666 if (rc == H_CLOSED) { 2667 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2668 } else if (rc) { 2669 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2670 goto reg_failed; 2671 } 2672 2673 scrq->adapter = adapter; 2674 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2675 spin_lock_init(&scrq->lock); 2676 2677 netdev_dbg(adapter->netdev, 2678 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2679 scrq->crq_num, scrq->hw_irq, scrq->irq); 2680 2681 return scrq; 2682 2683 reg_failed: 2684 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2685 DMA_BIDIRECTIONAL); 2686 map_failed: 2687 free_pages((unsigned long)scrq->msgs, 2); 2688 zero_page_failed: 2689 kfree(scrq); 2690 2691 return NULL; 2692 } 2693 2694 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2695 { 2696 int i; 2697 2698 if (adapter->tx_scrq) { 2699 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2700 if (!adapter->tx_scrq[i]) 2701 continue; 2702 2703 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2704 i); 2705 if (adapter->tx_scrq[i]->irq) { 2706 free_irq(adapter->tx_scrq[i]->irq, 2707 adapter->tx_scrq[i]); 2708 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2709 adapter->tx_scrq[i]->irq = 0; 2710 } 2711 2712 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2713 do_h_free); 2714 } 2715 2716 kfree(adapter->tx_scrq); 2717 adapter->tx_scrq = NULL; 2718 adapter->num_active_tx_scrqs = 0; 2719 } 2720 2721 if (adapter->rx_scrq) { 2722 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2723 if (!adapter->rx_scrq[i]) 2724 continue; 2725 2726 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2727 i); 2728 if (adapter->rx_scrq[i]->irq) { 2729 free_irq(adapter->rx_scrq[i]->irq, 2730 adapter->rx_scrq[i]); 2731 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2732 adapter->rx_scrq[i]->irq = 0; 2733 } 2734 2735 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2736 do_h_free); 2737 } 2738 2739 kfree(adapter->rx_scrq); 2740 adapter->rx_scrq = NULL; 2741 adapter->num_active_rx_scrqs = 0; 2742 } 2743 } 2744 2745 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2746 struct ibmvnic_sub_crq_queue *scrq) 2747 { 2748 struct device *dev = &adapter->vdev->dev; 2749 unsigned long rc; 2750 2751 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2752 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2753 if (rc) 2754 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2755 scrq->hw_irq, rc); 2756 return rc; 2757 } 2758 2759 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2760 struct ibmvnic_sub_crq_queue *scrq) 2761 { 2762 struct device *dev = &adapter->vdev->dev; 2763 unsigned long rc; 2764 2765 if (scrq->hw_irq > 0x100000000ULL) { 2766 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2767 return 1; 2768 } 2769 2770 if (adapter->resetting && 2771 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2772 u64 val = (0xff000000) | scrq->hw_irq; 2773 2774 rc = plpar_hcall_norets(H_EOI, val); 2775 if (rc) 2776 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2777 val, rc); 2778 } 2779 2780 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2781 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2782 if (rc) 2783 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2784 scrq->hw_irq, rc); 2785 return rc; 2786 } 2787 2788 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2789 struct ibmvnic_sub_crq_queue *scrq) 2790 { 2791 struct device *dev = &adapter->vdev->dev; 2792 struct ibmvnic_tx_pool *tx_pool; 2793 struct ibmvnic_tx_buff *txbuff; 2794 union sub_crq *next; 2795 int index; 2796 int i, j; 2797 u8 *first; 2798 2799 restart_loop: 2800 while (pending_scrq(adapter, scrq)) { 2801 unsigned int pool = scrq->pool_index; 2802 int num_entries = 0; 2803 2804 next = ibmvnic_next_scrq(adapter, scrq); 2805 for (i = 0; i < next->tx_comp.num_comps; i++) { 2806 if (next->tx_comp.rcs[i]) { 2807 dev_err(dev, "tx error %x\n", 2808 next->tx_comp.rcs[i]); 2809 continue; 2810 } 2811 index = be32_to_cpu(next->tx_comp.correlators[i]); 2812 if (index & IBMVNIC_TSO_POOL_MASK) { 2813 tx_pool = &adapter->tso_pool[pool]; 2814 index &= ~IBMVNIC_TSO_POOL_MASK; 2815 } else { 2816 tx_pool = &adapter->tx_pool[pool]; 2817 } 2818 2819 txbuff = &tx_pool->tx_buff[index]; 2820 2821 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2822 if (!txbuff->data_dma[j]) 2823 continue; 2824 2825 txbuff->data_dma[j] = 0; 2826 } 2827 /* if sub_crq was sent indirectly */ 2828 first = &txbuff->indir_arr[0].generic.first; 2829 if (*first == IBMVNIC_CRQ_CMD) { 2830 dma_unmap_single(dev, txbuff->indir_dma, 2831 sizeof(txbuff->indir_arr), 2832 DMA_TO_DEVICE); 2833 *first = 0; 2834 } 2835 2836 if (txbuff->last_frag) { 2837 dev_kfree_skb_any(txbuff->skb); 2838 txbuff->skb = NULL; 2839 } 2840 2841 num_entries += txbuff->num_entries; 2842 2843 tx_pool->free_map[tx_pool->producer_index] = index; 2844 tx_pool->producer_index = 2845 (tx_pool->producer_index + 1) % 2846 tx_pool->num_buffers; 2847 } 2848 /* remove tx_comp scrq*/ 2849 next->tx_comp.first = 0; 2850 2851 if (atomic_sub_return(num_entries, &scrq->used) <= 2852 (adapter->req_tx_entries_per_subcrq / 2) && 2853 __netif_subqueue_stopped(adapter->netdev, 2854 scrq->pool_index)) { 2855 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2856 netdev_dbg(adapter->netdev, "Started queue %d\n", 2857 scrq->pool_index); 2858 } 2859 } 2860 2861 enable_scrq_irq(adapter, scrq); 2862 2863 if (pending_scrq(adapter, scrq)) { 2864 disable_scrq_irq(adapter, scrq); 2865 goto restart_loop; 2866 } 2867 2868 return 0; 2869 } 2870 2871 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2872 { 2873 struct ibmvnic_sub_crq_queue *scrq = instance; 2874 struct ibmvnic_adapter *adapter = scrq->adapter; 2875 2876 disable_scrq_irq(adapter, scrq); 2877 ibmvnic_complete_tx(adapter, scrq); 2878 2879 return IRQ_HANDLED; 2880 } 2881 2882 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2883 { 2884 struct ibmvnic_sub_crq_queue *scrq = instance; 2885 struct ibmvnic_adapter *adapter = scrq->adapter; 2886 2887 /* When booting a kdump kernel we can hit pending interrupts 2888 * prior to completing driver initialization. 2889 */ 2890 if (unlikely(adapter->state != VNIC_OPEN)) 2891 return IRQ_NONE; 2892 2893 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2894 2895 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2896 disable_scrq_irq(adapter, scrq); 2897 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2898 } 2899 2900 return IRQ_HANDLED; 2901 } 2902 2903 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2904 { 2905 struct device *dev = &adapter->vdev->dev; 2906 struct ibmvnic_sub_crq_queue *scrq; 2907 int i = 0, j = 0; 2908 int rc = 0; 2909 2910 for (i = 0; i < adapter->req_tx_queues; i++) { 2911 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2912 i); 2913 scrq = adapter->tx_scrq[i]; 2914 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2915 2916 if (!scrq->irq) { 2917 rc = -EINVAL; 2918 dev_err(dev, "Error mapping irq\n"); 2919 goto req_tx_irq_failed; 2920 } 2921 2922 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 2923 adapter->vdev->unit_address, i); 2924 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2925 0, scrq->name, scrq); 2926 2927 if (rc) { 2928 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2929 scrq->irq, rc); 2930 irq_dispose_mapping(scrq->irq); 2931 goto req_tx_irq_failed; 2932 } 2933 } 2934 2935 for (i = 0; i < adapter->req_rx_queues; i++) { 2936 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2937 i); 2938 scrq = adapter->rx_scrq[i]; 2939 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2940 if (!scrq->irq) { 2941 rc = -EINVAL; 2942 dev_err(dev, "Error mapping irq\n"); 2943 goto req_rx_irq_failed; 2944 } 2945 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 2946 adapter->vdev->unit_address, i); 2947 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2948 0, scrq->name, scrq); 2949 if (rc) { 2950 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2951 scrq->irq, rc); 2952 irq_dispose_mapping(scrq->irq); 2953 goto req_rx_irq_failed; 2954 } 2955 } 2956 return rc; 2957 2958 req_rx_irq_failed: 2959 for (j = 0; j < i; j++) { 2960 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2961 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2962 } 2963 i = adapter->req_tx_queues; 2964 req_tx_irq_failed: 2965 for (j = 0; j < i; j++) { 2966 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2967 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2968 } 2969 release_sub_crqs(adapter, 1); 2970 return rc; 2971 } 2972 2973 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2974 { 2975 struct device *dev = &adapter->vdev->dev; 2976 struct ibmvnic_sub_crq_queue **allqueues; 2977 int registered_queues = 0; 2978 int total_queues; 2979 int more = 0; 2980 int i; 2981 2982 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2983 2984 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2985 if (!allqueues) 2986 return -1; 2987 2988 for (i = 0; i < total_queues; i++) { 2989 allqueues[i] = init_sub_crq_queue(adapter); 2990 if (!allqueues[i]) { 2991 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2992 break; 2993 } 2994 registered_queues++; 2995 } 2996 2997 /* Make sure we were able to register the minimum number of queues */ 2998 if (registered_queues < 2999 adapter->min_tx_queues + adapter->min_rx_queues) { 3000 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3001 goto tx_failed; 3002 } 3003 3004 /* Distribute the failed allocated queues*/ 3005 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3006 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3007 switch (i % 3) { 3008 case 0: 3009 if (adapter->req_rx_queues > adapter->min_rx_queues) 3010 adapter->req_rx_queues--; 3011 else 3012 more++; 3013 break; 3014 case 1: 3015 if (adapter->req_tx_queues > adapter->min_tx_queues) 3016 adapter->req_tx_queues--; 3017 else 3018 more++; 3019 break; 3020 } 3021 } 3022 3023 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3024 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3025 if (!adapter->tx_scrq) 3026 goto tx_failed; 3027 3028 for (i = 0; i < adapter->req_tx_queues; i++) { 3029 adapter->tx_scrq[i] = allqueues[i]; 3030 adapter->tx_scrq[i]->pool_index = i; 3031 adapter->num_active_tx_scrqs++; 3032 } 3033 3034 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3035 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3036 if (!adapter->rx_scrq) 3037 goto rx_failed; 3038 3039 for (i = 0; i < adapter->req_rx_queues; i++) { 3040 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3041 adapter->rx_scrq[i]->scrq_num = i; 3042 adapter->num_active_rx_scrqs++; 3043 } 3044 3045 kfree(allqueues); 3046 return 0; 3047 3048 rx_failed: 3049 kfree(adapter->tx_scrq); 3050 adapter->tx_scrq = NULL; 3051 tx_failed: 3052 for (i = 0; i < registered_queues; i++) 3053 release_sub_crq_queue(adapter, allqueues[i], 1); 3054 kfree(allqueues); 3055 return -1; 3056 } 3057 3058 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3059 { 3060 struct device *dev = &adapter->vdev->dev; 3061 union ibmvnic_crq crq; 3062 int max_entries; 3063 3064 if (!retry) { 3065 /* Sub-CRQ entries are 32 byte long */ 3066 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3067 3068 if (adapter->min_tx_entries_per_subcrq > entries_page || 3069 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3070 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3071 return; 3072 } 3073 3074 if (adapter->desired.mtu) 3075 adapter->req_mtu = adapter->desired.mtu; 3076 else 3077 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3078 3079 if (!adapter->desired.tx_entries) 3080 adapter->desired.tx_entries = 3081 adapter->max_tx_entries_per_subcrq; 3082 if (!adapter->desired.rx_entries) 3083 adapter->desired.rx_entries = 3084 adapter->max_rx_add_entries_per_subcrq; 3085 3086 max_entries = IBMVNIC_MAX_LTB_SIZE / 3087 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3088 3089 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3090 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3091 adapter->desired.tx_entries = max_entries; 3092 } 3093 3094 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3095 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3096 adapter->desired.rx_entries = max_entries; 3097 } 3098 3099 if (adapter->desired.tx_entries) 3100 adapter->req_tx_entries_per_subcrq = 3101 adapter->desired.tx_entries; 3102 else 3103 adapter->req_tx_entries_per_subcrq = 3104 adapter->max_tx_entries_per_subcrq; 3105 3106 if (adapter->desired.rx_entries) 3107 adapter->req_rx_add_entries_per_subcrq = 3108 adapter->desired.rx_entries; 3109 else 3110 adapter->req_rx_add_entries_per_subcrq = 3111 adapter->max_rx_add_entries_per_subcrq; 3112 3113 if (adapter->desired.tx_queues) 3114 adapter->req_tx_queues = 3115 adapter->desired.tx_queues; 3116 else 3117 adapter->req_tx_queues = 3118 adapter->opt_tx_comp_sub_queues; 3119 3120 if (adapter->desired.rx_queues) 3121 adapter->req_rx_queues = 3122 adapter->desired.rx_queues; 3123 else 3124 adapter->req_rx_queues = 3125 adapter->opt_rx_comp_queues; 3126 3127 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3128 } 3129 3130 memset(&crq, 0, sizeof(crq)); 3131 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3132 crq.request_capability.cmd = REQUEST_CAPABILITY; 3133 3134 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3135 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3136 atomic_inc(&adapter->running_cap_crqs); 3137 ibmvnic_send_crq(adapter, &crq); 3138 3139 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3140 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3141 atomic_inc(&adapter->running_cap_crqs); 3142 ibmvnic_send_crq(adapter, &crq); 3143 3144 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3145 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3146 atomic_inc(&adapter->running_cap_crqs); 3147 ibmvnic_send_crq(adapter, &crq); 3148 3149 crq.request_capability.capability = 3150 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3151 crq.request_capability.number = 3152 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3153 atomic_inc(&adapter->running_cap_crqs); 3154 ibmvnic_send_crq(adapter, &crq); 3155 3156 crq.request_capability.capability = 3157 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3158 crq.request_capability.number = 3159 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3160 atomic_inc(&adapter->running_cap_crqs); 3161 ibmvnic_send_crq(adapter, &crq); 3162 3163 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3164 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3165 atomic_inc(&adapter->running_cap_crqs); 3166 ibmvnic_send_crq(adapter, &crq); 3167 3168 if (adapter->netdev->flags & IFF_PROMISC) { 3169 if (adapter->promisc_supported) { 3170 crq.request_capability.capability = 3171 cpu_to_be16(PROMISC_REQUESTED); 3172 crq.request_capability.number = cpu_to_be64(1); 3173 atomic_inc(&adapter->running_cap_crqs); 3174 ibmvnic_send_crq(adapter, &crq); 3175 } 3176 } else { 3177 crq.request_capability.capability = 3178 cpu_to_be16(PROMISC_REQUESTED); 3179 crq.request_capability.number = cpu_to_be64(0); 3180 atomic_inc(&adapter->running_cap_crqs); 3181 ibmvnic_send_crq(adapter, &crq); 3182 } 3183 } 3184 3185 static int pending_scrq(struct ibmvnic_adapter *adapter, 3186 struct ibmvnic_sub_crq_queue *scrq) 3187 { 3188 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3189 3190 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3191 return 1; 3192 else 3193 return 0; 3194 } 3195 3196 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3197 struct ibmvnic_sub_crq_queue *scrq) 3198 { 3199 union sub_crq *entry; 3200 unsigned long flags; 3201 3202 spin_lock_irqsave(&scrq->lock, flags); 3203 entry = &scrq->msgs[scrq->cur]; 3204 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3205 if (++scrq->cur == scrq->size) 3206 scrq->cur = 0; 3207 } else { 3208 entry = NULL; 3209 } 3210 spin_unlock_irqrestore(&scrq->lock, flags); 3211 3212 return entry; 3213 } 3214 3215 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3216 { 3217 struct ibmvnic_crq_queue *queue = &adapter->crq; 3218 union ibmvnic_crq *crq; 3219 3220 crq = &queue->msgs[queue->cur]; 3221 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3222 if (++queue->cur == queue->size) 3223 queue->cur = 0; 3224 } else { 3225 crq = NULL; 3226 } 3227 3228 return crq; 3229 } 3230 3231 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3232 { 3233 switch (rc) { 3234 case H_PARAMETER: 3235 dev_warn_ratelimited(dev, 3236 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3237 func, rc); 3238 break; 3239 case H_CLOSED: 3240 dev_warn_ratelimited(dev, 3241 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3242 func, rc); 3243 break; 3244 default: 3245 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3246 break; 3247 } 3248 } 3249 3250 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3251 union sub_crq *sub_crq) 3252 { 3253 unsigned int ua = adapter->vdev->unit_address; 3254 struct device *dev = &adapter->vdev->dev; 3255 u64 *u64_crq = (u64 *)sub_crq; 3256 int rc; 3257 3258 netdev_dbg(adapter->netdev, 3259 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3260 (unsigned long int)cpu_to_be64(remote_handle), 3261 (unsigned long int)cpu_to_be64(u64_crq[0]), 3262 (unsigned long int)cpu_to_be64(u64_crq[1]), 3263 (unsigned long int)cpu_to_be64(u64_crq[2]), 3264 (unsigned long int)cpu_to_be64(u64_crq[3])); 3265 3266 /* Make sure the hypervisor sees the complete request */ 3267 mb(); 3268 3269 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3270 cpu_to_be64(remote_handle), 3271 cpu_to_be64(u64_crq[0]), 3272 cpu_to_be64(u64_crq[1]), 3273 cpu_to_be64(u64_crq[2]), 3274 cpu_to_be64(u64_crq[3])); 3275 3276 if (rc) 3277 print_subcrq_error(dev, rc, __func__); 3278 3279 return rc; 3280 } 3281 3282 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3283 u64 remote_handle, u64 ioba, u64 num_entries) 3284 { 3285 unsigned int ua = adapter->vdev->unit_address; 3286 struct device *dev = &adapter->vdev->dev; 3287 int rc; 3288 3289 /* Make sure the hypervisor sees the complete request */ 3290 mb(); 3291 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3292 cpu_to_be64(remote_handle), 3293 ioba, num_entries); 3294 3295 if (rc) 3296 print_subcrq_error(dev, rc, __func__); 3297 3298 return rc; 3299 } 3300 3301 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3302 union ibmvnic_crq *crq) 3303 { 3304 unsigned int ua = adapter->vdev->unit_address; 3305 struct device *dev = &adapter->vdev->dev; 3306 u64 *u64_crq = (u64 *)crq; 3307 int rc; 3308 3309 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3310 (unsigned long int)cpu_to_be64(u64_crq[0]), 3311 (unsigned long int)cpu_to_be64(u64_crq[1])); 3312 3313 if (!adapter->crq.active && 3314 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3315 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3316 return -EINVAL; 3317 } 3318 3319 /* Make sure the hypervisor sees the complete request */ 3320 mb(); 3321 3322 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3323 cpu_to_be64(u64_crq[0]), 3324 cpu_to_be64(u64_crq[1])); 3325 3326 if (rc) { 3327 if (rc == H_CLOSED) { 3328 dev_warn(dev, "CRQ Queue closed\n"); 3329 if (adapter->resetting) 3330 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3331 } 3332 3333 dev_warn(dev, "Send error (rc=%d)\n", rc); 3334 } 3335 3336 return rc; 3337 } 3338 3339 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3340 { 3341 union ibmvnic_crq crq; 3342 3343 memset(&crq, 0, sizeof(crq)); 3344 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3345 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3346 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3347 3348 return ibmvnic_send_crq(adapter, &crq); 3349 } 3350 3351 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3352 { 3353 union ibmvnic_crq crq; 3354 3355 memset(&crq, 0, sizeof(crq)); 3356 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3357 crq.version_exchange.cmd = VERSION_EXCHANGE; 3358 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3359 3360 return ibmvnic_send_crq(adapter, &crq); 3361 } 3362 3363 struct vnic_login_client_data { 3364 u8 type; 3365 __be16 len; 3366 char name[]; 3367 } __packed; 3368 3369 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3370 { 3371 int len; 3372 3373 /* Calculate the amount of buffer space needed for the 3374 * vnic client data in the login buffer. There are four entries, 3375 * OS name, LPAR name, device name, and a null last entry. 3376 */ 3377 len = 4 * sizeof(struct vnic_login_client_data); 3378 len += 6; /* "Linux" plus NULL */ 3379 len += strlen(utsname()->nodename) + 1; 3380 len += strlen(adapter->netdev->name) + 1; 3381 3382 return len; 3383 } 3384 3385 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3386 struct vnic_login_client_data *vlcd) 3387 { 3388 const char *os_name = "Linux"; 3389 int len; 3390 3391 /* Type 1 - LPAR OS */ 3392 vlcd->type = 1; 3393 len = strlen(os_name) + 1; 3394 vlcd->len = cpu_to_be16(len); 3395 strncpy(vlcd->name, os_name, len); 3396 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3397 3398 /* Type 2 - LPAR name */ 3399 vlcd->type = 2; 3400 len = strlen(utsname()->nodename) + 1; 3401 vlcd->len = cpu_to_be16(len); 3402 strncpy(vlcd->name, utsname()->nodename, len); 3403 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3404 3405 /* Type 3 - device name */ 3406 vlcd->type = 3; 3407 len = strlen(adapter->netdev->name) + 1; 3408 vlcd->len = cpu_to_be16(len); 3409 strncpy(vlcd->name, adapter->netdev->name, len); 3410 } 3411 3412 static int send_login(struct ibmvnic_adapter *adapter) 3413 { 3414 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3415 struct ibmvnic_login_buffer *login_buffer; 3416 struct device *dev = &adapter->vdev->dev; 3417 dma_addr_t rsp_buffer_token; 3418 dma_addr_t buffer_token; 3419 size_t rsp_buffer_size; 3420 union ibmvnic_crq crq; 3421 size_t buffer_size; 3422 __be64 *tx_list_p; 3423 __be64 *rx_list_p; 3424 int client_data_len; 3425 struct vnic_login_client_data *vlcd; 3426 int i; 3427 3428 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3429 netdev_err(adapter->netdev, 3430 "RX or TX queues are not allocated, device login failed\n"); 3431 return -1; 3432 } 3433 3434 release_login_rsp_buffer(adapter); 3435 client_data_len = vnic_client_data_len(adapter); 3436 3437 buffer_size = 3438 sizeof(struct ibmvnic_login_buffer) + 3439 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3440 client_data_len; 3441 3442 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3443 if (!login_buffer) 3444 goto buf_alloc_failed; 3445 3446 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3447 DMA_TO_DEVICE); 3448 if (dma_mapping_error(dev, buffer_token)) { 3449 dev_err(dev, "Couldn't map login buffer\n"); 3450 goto buf_map_failed; 3451 } 3452 3453 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3454 sizeof(u64) * adapter->req_tx_queues + 3455 sizeof(u64) * adapter->req_rx_queues + 3456 sizeof(u64) * adapter->req_rx_queues + 3457 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3458 3459 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3460 if (!login_rsp_buffer) 3461 goto buf_rsp_alloc_failed; 3462 3463 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3464 rsp_buffer_size, DMA_FROM_DEVICE); 3465 if (dma_mapping_error(dev, rsp_buffer_token)) { 3466 dev_err(dev, "Couldn't map login rsp buffer\n"); 3467 goto buf_rsp_map_failed; 3468 } 3469 3470 adapter->login_buf = login_buffer; 3471 adapter->login_buf_token = buffer_token; 3472 adapter->login_buf_sz = buffer_size; 3473 adapter->login_rsp_buf = login_rsp_buffer; 3474 adapter->login_rsp_buf_token = rsp_buffer_token; 3475 adapter->login_rsp_buf_sz = rsp_buffer_size; 3476 3477 login_buffer->len = cpu_to_be32(buffer_size); 3478 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3479 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3480 login_buffer->off_txcomp_subcrqs = 3481 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3482 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3483 login_buffer->off_rxcomp_subcrqs = 3484 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3485 sizeof(u64) * adapter->req_tx_queues); 3486 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3487 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3488 3489 tx_list_p = (__be64 *)((char *)login_buffer + 3490 sizeof(struct ibmvnic_login_buffer)); 3491 rx_list_p = (__be64 *)((char *)login_buffer + 3492 sizeof(struct ibmvnic_login_buffer) + 3493 sizeof(u64) * adapter->req_tx_queues); 3494 3495 for (i = 0; i < adapter->req_tx_queues; i++) { 3496 if (adapter->tx_scrq[i]) { 3497 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3498 crq_num); 3499 } 3500 } 3501 3502 for (i = 0; i < adapter->req_rx_queues; i++) { 3503 if (adapter->rx_scrq[i]) { 3504 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3505 crq_num); 3506 } 3507 } 3508 3509 /* Insert vNIC login client data */ 3510 vlcd = (struct vnic_login_client_data *) 3511 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3512 login_buffer->client_data_offset = 3513 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3514 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3515 3516 vnic_add_client_data(adapter, vlcd); 3517 3518 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3519 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3520 netdev_dbg(adapter->netdev, "%016lx\n", 3521 ((unsigned long int *)(adapter->login_buf))[i]); 3522 } 3523 3524 memset(&crq, 0, sizeof(crq)); 3525 crq.login.first = IBMVNIC_CRQ_CMD; 3526 crq.login.cmd = LOGIN; 3527 crq.login.ioba = cpu_to_be32(buffer_token); 3528 crq.login.len = cpu_to_be32(buffer_size); 3529 ibmvnic_send_crq(adapter, &crq); 3530 3531 return 0; 3532 3533 buf_rsp_map_failed: 3534 kfree(login_rsp_buffer); 3535 buf_rsp_alloc_failed: 3536 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3537 buf_map_failed: 3538 kfree(login_buffer); 3539 buf_alloc_failed: 3540 return -1; 3541 } 3542 3543 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3544 u32 len, u8 map_id) 3545 { 3546 union ibmvnic_crq crq; 3547 3548 memset(&crq, 0, sizeof(crq)); 3549 crq.request_map.first = IBMVNIC_CRQ_CMD; 3550 crq.request_map.cmd = REQUEST_MAP; 3551 crq.request_map.map_id = map_id; 3552 crq.request_map.ioba = cpu_to_be32(addr); 3553 crq.request_map.len = cpu_to_be32(len); 3554 return ibmvnic_send_crq(adapter, &crq); 3555 } 3556 3557 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3558 { 3559 union ibmvnic_crq crq; 3560 3561 memset(&crq, 0, sizeof(crq)); 3562 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3563 crq.request_unmap.cmd = REQUEST_UNMAP; 3564 crq.request_unmap.map_id = map_id; 3565 return ibmvnic_send_crq(adapter, &crq); 3566 } 3567 3568 static void send_map_query(struct ibmvnic_adapter *adapter) 3569 { 3570 union ibmvnic_crq crq; 3571 3572 memset(&crq, 0, sizeof(crq)); 3573 crq.query_map.first = IBMVNIC_CRQ_CMD; 3574 crq.query_map.cmd = QUERY_MAP; 3575 ibmvnic_send_crq(adapter, &crq); 3576 } 3577 3578 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3579 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3580 { 3581 union ibmvnic_crq crq; 3582 3583 atomic_set(&adapter->running_cap_crqs, 0); 3584 memset(&crq, 0, sizeof(crq)); 3585 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3586 crq.query_capability.cmd = QUERY_CAPABILITY; 3587 3588 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3589 atomic_inc(&adapter->running_cap_crqs); 3590 ibmvnic_send_crq(adapter, &crq); 3591 3592 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3593 atomic_inc(&adapter->running_cap_crqs); 3594 ibmvnic_send_crq(adapter, &crq); 3595 3596 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3597 atomic_inc(&adapter->running_cap_crqs); 3598 ibmvnic_send_crq(adapter, &crq); 3599 3600 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3601 atomic_inc(&adapter->running_cap_crqs); 3602 ibmvnic_send_crq(adapter, &crq); 3603 3604 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3605 atomic_inc(&adapter->running_cap_crqs); 3606 ibmvnic_send_crq(adapter, &crq); 3607 3608 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3609 atomic_inc(&adapter->running_cap_crqs); 3610 ibmvnic_send_crq(adapter, &crq); 3611 3612 crq.query_capability.capability = 3613 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3614 atomic_inc(&adapter->running_cap_crqs); 3615 ibmvnic_send_crq(adapter, &crq); 3616 3617 crq.query_capability.capability = 3618 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3619 atomic_inc(&adapter->running_cap_crqs); 3620 ibmvnic_send_crq(adapter, &crq); 3621 3622 crq.query_capability.capability = 3623 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3624 atomic_inc(&adapter->running_cap_crqs); 3625 ibmvnic_send_crq(adapter, &crq); 3626 3627 crq.query_capability.capability = 3628 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3629 atomic_inc(&adapter->running_cap_crqs); 3630 ibmvnic_send_crq(adapter, &crq); 3631 3632 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3633 atomic_inc(&adapter->running_cap_crqs); 3634 ibmvnic_send_crq(adapter, &crq); 3635 3636 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3637 atomic_inc(&adapter->running_cap_crqs); 3638 ibmvnic_send_crq(adapter, &crq); 3639 3640 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3641 atomic_inc(&adapter->running_cap_crqs); 3642 ibmvnic_send_crq(adapter, &crq); 3643 3644 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3645 atomic_inc(&adapter->running_cap_crqs); 3646 ibmvnic_send_crq(adapter, &crq); 3647 3648 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3649 atomic_inc(&adapter->running_cap_crqs); 3650 ibmvnic_send_crq(adapter, &crq); 3651 3652 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3653 atomic_inc(&adapter->running_cap_crqs); 3654 ibmvnic_send_crq(adapter, &crq); 3655 3656 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3657 atomic_inc(&adapter->running_cap_crqs); 3658 ibmvnic_send_crq(adapter, &crq); 3659 3660 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3661 atomic_inc(&adapter->running_cap_crqs); 3662 ibmvnic_send_crq(adapter, &crq); 3663 3664 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3665 atomic_inc(&adapter->running_cap_crqs); 3666 ibmvnic_send_crq(adapter, &crq); 3667 3668 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3669 atomic_inc(&adapter->running_cap_crqs); 3670 ibmvnic_send_crq(adapter, &crq); 3671 3672 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3673 atomic_inc(&adapter->running_cap_crqs); 3674 ibmvnic_send_crq(adapter, &crq); 3675 3676 crq.query_capability.capability = 3677 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3678 atomic_inc(&adapter->running_cap_crqs); 3679 ibmvnic_send_crq(adapter, &crq); 3680 3681 crq.query_capability.capability = 3682 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3683 atomic_inc(&adapter->running_cap_crqs); 3684 ibmvnic_send_crq(adapter, &crq); 3685 3686 crq.query_capability.capability = 3687 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3688 atomic_inc(&adapter->running_cap_crqs); 3689 ibmvnic_send_crq(adapter, &crq); 3690 3691 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3692 atomic_inc(&adapter->running_cap_crqs); 3693 ibmvnic_send_crq(adapter, &crq); 3694 } 3695 3696 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3697 struct ibmvnic_adapter *adapter) 3698 { 3699 struct device *dev = &adapter->vdev->dev; 3700 3701 if (crq->get_vpd_size_rsp.rc.code) { 3702 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3703 crq->get_vpd_size_rsp.rc.code); 3704 complete(&adapter->fw_done); 3705 return; 3706 } 3707 3708 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3709 complete(&adapter->fw_done); 3710 } 3711 3712 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3713 struct ibmvnic_adapter *adapter) 3714 { 3715 struct device *dev = &adapter->vdev->dev; 3716 unsigned char *substr = NULL; 3717 u8 fw_level_len = 0; 3718 3719 memset(adapter->fw_version, 0, 32); 3720 3721 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3722 DMA_FROM_DEVICE); 3723 3724 if (crq->get_vpd_rsp.rc.code) { 3725 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3726 crq->get_vpd_rsp.rc.code); 3727 goto complete; 3728 } 3729 3730 /* get the position of the firmware version info 3731 * located after the ASCII 'RM' substring in the buffer 3732 */ 3733 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3734 if (!substr) { 3735 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3736 goto complete; 3737 } 3738 3739 /* get length of firmware level ASCII substring */ 3740 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3741 fw_level_len = *(substr + 2); 3742 } else { 3743 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3744 goto complete; 3745 } 3746 3747 /* copy firmware version string from vpd into adapter */ 3748 if ((substr + 3 + fw_level_len) < 3749 (adapter->vpd->buff + adapter->vpd->len)) { 3750 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3751 } else { 3752 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3753 } 3754 3755 complete: 3756 if (adapter->fw_version[0] == '\0') 3757 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3758 complete(&adapter->fw_done); 3759 } 3760 3761 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3762 { 3763 struct device *dev = &adapter->vdev->dev; 3764 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3765 netdev_features_t old_hw_features = 0; 3766 union ibmvnic_crq crq; 3767 int i; 3768 3769 dma_unmap_single(dev, adapter->ip_offload_tok, 3770 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3771 3772 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3773 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3774 netdev_dbg(adapter->netdev, "%016lx\n", 3775 ((unsigned long int *)(buf))[i]); 3776 3777 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3778 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3779 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3780 buf->tcp_ipv4_chksum); 3781 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3782 buf->tcp_ipv6_chksum); 3783 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3784 buf->udp_ipv4_chksum); 3785 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3786 buf->udp_ipv6_chksum); 3787 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3788 buf->large_tx_ipv4); 3789 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3790 buf->large_tx_ipv6); 3791 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3792 buf->large_rx_ipv4); 3793 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3794 buf->large_rx_ipv6); 3795 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3796 buf->max_ipv4_header_size); 3797 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3798 buf->max_ipv6_header_size); 3799 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3800 buf->max_tcp_header_size); 3801 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3802 buf->max_udp_header_size); 3803 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3804 buf->max_large_tx_size); 3805 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3806 buf->max_large_rx_size); 3807 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3808 buf->ipv6_extension_header); 3809 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3810 buf->tcp_pseudosum_req); 3811 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3812 buf->num_ipv6_ext_headers); 3813 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3814 buf->off_ipv6_ext_headers); 3815 3816 adapter->ip_offload_ctrl_tok = 3817 dma_map_single(dev, &adapter->ip_offload_ctrl, 3818 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3819 3820 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3821 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3822 return; 3823 } 3824 3825 adapter->ip_offload_ctrl.len = 3826 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3827 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3828 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3829 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3830 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3831 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3832 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3833 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3834 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3835 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3836 3837 /* large_rx disabled for now, additional features needed */ 3838 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3839 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3840 3841 if (adapter->state != VNIC_PROBING) { 3842 old_hw_features = adapter->netdev->hw_features; 3843 adapter->netdev->hw_features = 0; 3844 } 3845 3846 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 3847 3848 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3849 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 3850 3851 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3852 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 3853 3854 if ((adapter->netdev->features & 3855 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3856 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 3857 3858 if (buf->large_tx_ipv4) 3859 adapter->netdev->hw_features |= NETIF_F_TSO; 3860 if (buf->large_tx_ipv6) 3861 adapter->netdev->hw_features |= NETIF_F_TSO6; 3862 3863 if (adapter->state == VNIC_PROBING) { 3864 adapter->netdev->features |= adapter->netdev->hw_features; 3865 } else if (old_hw_features != adapter->netdev->hw_features) { 3866 netdev_features_t tmp = 0; 3867 3868 /* disable features no longer supported */ 3869 adapter->netdev->features &= adapter->netdev->hw_features; 3870 /* turn on features now supported if previously enabled */ 3871 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 3872 adapter->netdev->hw_features; 3873 adapter->netdev->features |= 3874 tmp & adapter->netdev->wanted_features; 3875 } 3876 3877 memset(&crq, 0, sizeof(crq)); 3878 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3879 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3880 crq.control_ip_offload.len = 3881 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3882 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3883 ibmvnic_send_crq(adapter, &crq); 3884 } 3885 3886 static const char *ibmvnic_fw_err_cause(u16 cause) 3887 { 3888 switch (cause) { 3889 case ADAPTER_PROBLEM: 3890 return "adapter problem"; 3891 case BUS_PROBLEM: 3892 return "bus problem"; 3893 case FW_PROBLEM: 3894 return "firmware problem"; 3895 case DD_PROBLEM: 3896 return "device driver problem"; 3897 case EEH_RECOVERY: 3898 return "EEH recovery"; 3899 case FW_UPDATED: 3900 return "firmware updated"; 3901 case LOW_MEMORY: 3902 return "low Memory"; 3903 default: 3904 return "unknown"; 3905 } 3906 } 3907 3908 static void handle_error_indication(union ibmvnic_crq *crq, 3909 struct ibmvnic_adapter *adapter) 3910 { 3911 struct device *dev = &adapter->vdev->dev; 3912 u16 cause; 3913 3914 cause = be16_to_cpu(crq->error_indication.error_cause); 3915 3916 dev_warn_ratelimited(dev, 3917 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3918 crq->error_indication.flags 3919 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3920 ibmvnic_fw_err_cause(cause)); 3921 3922 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3923 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3924 else 3925 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3926 } 3927 3928 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3929 struct ibmvnic_adapter *adapter) 3930 { 3931 struct net_device *netdev = adapter->netdev; 3932 struct device *dev = &adapter->vdev->dev; 3933 long rc; 3934 3935 rc = crq->change_mac_addr_rsp.rc.code; 3936 if (rc) { 3937 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3938 goto out; 3939 } 3940 ether_addr_copy(netdev->dev_addr, 3941 &crq->change_mac_addr_rsp.mac_addr[0]); 3942 out: 3943 complete(&adapter->fw_done); 3944 return rc; 3945 } 3946 3947 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3948 struct ibmvnic_adapter *adapter) 3949 { 3950 struct device *dev = &adapter->vdev->dev; 3951 u64 *req_value; 3952 char *name; 3953 3954 atomic_dec(&adapter->running_cap_crqs); 3955 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3956 case REQ_TX_QUEUES: 3957 req_value = &adapter->req_tx_queues; 3958 name = "tx"; 3959 break; 3960 case REQ_RX_QUEUES: 3961 req_value = &adapter->req_rx_queues; 3962 name = "rx"; 3963 break; 3964 case REQ_RX_ADD_QUEUES: 3965 req_value = &adapter->req_rx_add_queues; 3966 name = "rx_add"; 3967 break; 3968 case REQ_TX_ENTRIES_PER_SUBCRQ: 3969 req_value = &adapter->req_tx_entries_per_subcrq; 3970 name = "tx_entries_per_subcrq"; 3971 break; 3972 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3973 req_value = &adapter->req_rx_add_entries_per_subcrq; 3974 name = "rx_add_entries_per_subcrq"; 3975 break; 3976 case REQ_MTU: 3977 req_value = &adapter->req_mtu; 3978 name = "mtu"; 3979 break; 3980 case PROMISC_REQUESTED: 3981 req_value = &adapter->promisc; 3982 name = "promisc"; 3983 break; 3984 default: 3985 dev_err(dev, "Got invalid cap request rsp %d\n", 3986 crq->request_capability.capability); 3987 return; 3988 } 3989 3990 switch (crq->request_capability_rsp.rc.code) { 3991 case SUCCESS: 3992 break; 3993 case PARTIALSUCCESS: 3994 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3995 *req_value, 3996 (long int)be64_to_cpu(crq->request_capability_rsp. 3997 number), name); 3998 3999 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4000 REQ_MTU) { 4001 pr_err("mtu of %llu is not supported. Reverting.\n", 4002 *req_value); 4003 *req_value = adapter->fallback.mtu; 4004 } else { 4005 *req_value = 4006 be64_to_cpu(crq->request_capability_rsp.number); 4007 } 4008 4009 ibmvnic_send_req_caps(adapter, 1); 4010 return; 4011 default: 4012 dev_err(dev, "Error %d in request cap rsp\n", 4013 crq->request_capability_rsp.rc.code); 4014 return; 4015 } 4016 4017 /* Done receiving requested capabilities, query IP offload support */ 4018 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4019 union ibmvnic_crq newcrq; 4020 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4021 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4022 &adapter->ip_offload_buf; 4023 4024 adapter->wait_capability = false; 4025 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4026 buf_sz, 4027 DMA_FROM_DEVICE); 4028 4029 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4030 if (!firmware_has_feature(FW_FEATURE_CMO)) 4031 dev_err(dev, "Couldn't map offload buffer\n"); 4032 return; 4033 } 4034 4035 memset(&newcrq, 0, sizeof(newcrq)); 4036 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4037 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4038 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4039 newcrq.query_ip_offload.ioba = 4040 cpu_to_be32(adapter->ip_offload_tok); 4041 4042 ibmvnic_send_crq(adapter, &newcrq); 4043 } 4044 } 4045 4046 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4047 struct ibmvnic_adapter *adapter) 4048 { 4049 struct device *dev = &adapter->vdev->dev; 4050 struct net_device *netdev = adapter->netdev; 4051 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4052 struct ibmvnic_login_buffer *login = adapter->login_buf; 4053 int i; 4054 4055 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4056 DMA_TO_DEVICE); 4057 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4058 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4059 4060 /* If the number of queues requested can't be allocated by the 4061 * server, the login response will return with code 1. We will need 4062 * to resend the login buffer with fewer queues requested. 4063 */ 4064 if (login_rsp_crq->generic.rc.code) { 4065 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4066 complete(&adapter->init_done); 4067 return 0; 4068 } 4069 4070 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4071 4072 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4073 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4074 netdev_dbg(adapter->netdev, "%016lx\n", 4075 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4076 } 4077 4078 /* Sanity checks */ 4079 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4080 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4081 adapter->req_rx_add_queues != 4082 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4083 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4084 ibmvnic_remove(adapter->vdev); 4085 return -EIO; 4086 } 4087 release_login_buffer(adapter); 4088 complete(&adapter->init_done); 4089 4090 return 0; 4091 } 4092 4093 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4094 struct ibmvnic_adapter *adapter) 4095 { 4096 struct device *dev = &adapter->vdev->dev; 4097 long rc; 4098 4099 rc = crq->request_unmap_rsp.rc.code; 4100 if (rc) 4101 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4102 } 4103 4104 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4105 struct ibmvnic_adapter *adapter) 4106 { 4107 struct net_device *netdev = adapter->netdev; 4108 struct device *dev = &adapter->vdev->dev; 4109 long rc; 4110 4111 rc = crq->query_map_rsp.rc.code; 4112 if (rc) { 4113 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4114 return; 4115 } 4116 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4117 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4118 crq->query_map_rsp.free_pages); 4119 } 4120 4121 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4122 struct ibmvnic_adapter *adapter) 4123 { 4124 struct net_device *netdev = adapter->netdev; 4125 struct device *dev = &adapter->vdev->dev; 4126 long rc; 4127 4128 atomic_dec(&adapter->running_cap_crqs); 4129 netdev_dbg(netdev, "Outstanding queries: %d\n", 4130 atomic_read(&adapter->running_cap_crqs)); 4131 rc = crq->query_capability.rc.code; 4132 if (rc) { 4133 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4134 goto out; 4135 } 4136 4137 switch (be16_to_cpu(crq->query_capability.capability)) { 4138 case MIN_TX_QUEUES: 4139 adapter->min_tx_queues = 4140 be64_to_cpu(crq->query_capability.number); 4141 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4142 adapter->min_tx_queues); 4143 break; 4144 case MIN_RX_QUEUES: 4145 adapter->min_rx_queues = 4146 be64_to_cpu(crq->query_capability.number); 4147 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4148 adapter->min_rx_queues); 4149 break; 4150 case MIN_RX_ADD_QUEUES: 4151 adapter->min_rx_add_queues = 4152 be64_to_cpu(crq->query_capability.number); 4153 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4154 adapter->min_rx_add_queues); 4155 break; 4156 case MAX_TX_QUEUES: 4157 adapter->max_tx_queues = 4158 be64_to_cpu(crq->query_capability.number); 4159 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4160 adapter->max_tx_queues); 4161 break; 4162 case MAX_RX_QUEUES: 4163 adapter->max_rx_queues = 4164 be64_to_cpu(crq->query_capability.number); 4165 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4166 adapter->max_rx_queues); 4167 break; 4168 case MAX_RX_ADD_QUEUES: 4169 adapter->max_rx_add_queues = 4170 be64_to_cpu(crq->query_capability.number); 4171 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4172 adapter->max_rx_add_queues); 4173 break; 4174 case MIN_TX_ENTRIES_PER_SUBCRQ: 4175 adapter->min_tx_entries_per_subcrq = 4176 be64_to_cpu(crq->query_capability.number); 4177 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4178 adapter->min_tx_entries_per_subcrq); 4179 break; 4180 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4181 adapter->min_rx_add_entries_per_subcrq = 4182 be64_to_cpu(crq->query_capability.number); 4183 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4184 adapter->min_rx_add_entries_per_subcrq); 4185 break; 4186 case MAX_TX_ENTRIES_PER_SUBCRQ: 4187 adapter->max_tx_entries_per_subcrq = 4188 be64_to_cpu(crq->query_capability.number); 4189 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4190 adapter->max_tx_entries_per_subcrq); 4191 break; 4192 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4193 adapter->max_rx_add_entries_per_subcrq = 4194 be64_to_cpu(crq->query_capability.number); 4195 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4196 adapter->max_rx_add_entries_per_subcrq); 4197 break; 4198 case TCP_IP_OFFLOAD: 4199 adapter->tcp_ip_offload = 4200 be64_to_cpu(crq->query_capability.number); 4201 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4202 adapter->tcp_ip_offload); 4203 break; 4204 case PROMISC_SUPPORTED: 4205 adapter->promisc_supported = 4206 be64_to_cpu(crq->query_capability.number); 4207 netdev_dbg(netdev, "promisc_supported = %lld\n", 4208 adapter->promisc_supported); 4209 break; 4210 case MIN_MTU: 4211 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4212 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4213 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4214 break; 4215 case MAX_MTU: 4216 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4217 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4218 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4219 break; 4220 case MAX_MULTICAST_FILTERS: 4221 adapter->max_multicast_filters = 4222 be64_to_cpu(crq->query_capability.number); 4223 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4224 adapter->max_multicast_filters); 4225 break; 4226 case VLAN_HEADER_INSERTION: 4227 adapter->vlan_header_insertion = 4228 be64_to_cpu(crq->query_capability.number); 4229 if (adapter->vlan_header_insertion) 4230 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4231 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4232 adapter->vlan_header_insertion); 4233 break; 4234 case RX_VLAN_HEADER_INSERTION: 4235 adapter->rx_vlan_header_insertion = 4236 be64_to_cpu(crq->query_capability.number); 4237 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4238 adapter->rx_vlan_header_insertion); 4239 break; 4240 case MAX_TX_SG_ENTRIES: 4241 adapter->max_tx_sg_entries = 4242 be64_to_cpu(crq->query_capability.number); 4243 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4244 adapter->max_tx_sg_entries); 4245 break; 4246 case RX_SG_SUPPORTED: 4247 adapter->rx_sg_supported = 4248 be64_to_cpu(crq->query_capability.number); 4249 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4250 adapter->rx_sg_supported); 4251 break; 4252 case OPT_TX_COMP_SUB_QUEUES: 4253 adapter->opt_tx_comp_sub_queues = 4254 be64_to_cpu(crq->query_capability.number); 4255 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4256 adapter->opt_tx_comp_sub_queues); 4257 break; 4258 case OPT_RX_COMP_QUEUES: 4259 adapter->opt_rx_comp_queues = 4260 be64_to_cpu(crq->query_capability.number); 4261 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4262 adapter->opt_rx_comp_queues); 4263 break; 4264 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4265 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4266 be64_to_cpu(crq->query_capability.number); 4267 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4268 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4269 break; 4270 case OPT_TX_ENTRIES_PER_SUBCRQ: 4271 adapter->opt_tx_entries_per_subcrq = 4272 be64_to_cpu(crq->query_capability.number); 4273 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4274 adapter->opt_tx_entries_per_subcrq); 4275 break; 4276 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4277 adapter->opt_rxba_entries_per_subcrq = 4278 be64_to_cpu(crq->query_capability.number); 4279 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4280 adapter->opt_rxba_entries_per_subcrq); 4281 break; 4282 case TX_RX_DESC_REQ: 4283 adapter->tx_rx_desc_req = crq->query_capability.number; 4284 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4285 adapter->tx_rx_desc_req); 4286 break; 4287 4288 default: 4289 netdev_err(netdev, "Got invalid cap rsp %d\n", 4290 crq->query_capability.capability); 4291 } 4292 4293 out: 4294 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4295 adapter->wait_capability = false; 4296 ibmvnic_send_req_caps(adapter, 0); 4297 } 4298 } 4299 4300 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4301 { 4302 union ibmvnic_crq crq; 4303 int rc; 4304 4305 memset(&crq, 0, sizeof(crq)); 4306 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4307 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4308 init_completion(&adapter->fw_done); 4309 rc = ibmvnic_send_crq(adapter, &crq); 4310 if (rc) 4311 return rc; 4312 wait_for_completion(&adapter->fw_done); 4313 return adapter->fw_done_rc ? -EIO : 0; 4314 } 4315 4316 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4317 struct ibmvnic_adapter *adapter) 4318 { 4319 struct net_device *netdev = adapter->netdev; 4320 int rc; 4321 4322 rc = crq->query_phys_parms_rsp.rc.code; 4323 if (rc) { 4324 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4325 return rc; 4326 } 4327 switch (cpu_to_be32(crq->query_phys_parms_rsp.speed)) { 4328 case IBMVNIC_10MBPS: 4329 adapter->speed = SPEED_10; 4330 break; 4331 case IBMVNIC_100MBPS: 4332 adapter->speed = SPEED_100; 4333 break; 4334 case IBMVNIC_1GBPS: 4335 adapter->speed = SPEED_1000; 4336 break; 4337 case IBMVNIC_10GBP: 4338 adapter->speed = SPEED_10000; 4339 break; 4340 case IBMVNIC_25GBPS: 4341 adapter->speed = SPEED_25000; 4342 break; 4343 case IBMVNIC_40GBPS: 4344 adapter->speed = SPEED_40000; 4345 break; 4346 case IBMVNIC_50GBPS: 4347 adapter->speed = SPEED_50000; 4348 break; 4349 case IBMVNIC_100GBPS: 4350 adapter->speed = SPEED_100000; 4351 break; 4352 default: 4353 netdev_warn(netdev, "Unknown speed 0x%08x\n", 4354 cpu_to_be32(crq->query_phys_parms_rsp.speed)); 4355 adapter->speed = SPEED_UNKNOWN; 4356 } 4357 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4358 adapter->duplex = DUPLEX_FULL; 4359 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4360 adapter->duplex = DUPLEX_HALF; 4361 else 4362 adapter->duplex = DUPLEX_UNKNOWN; 4363 4364 return rc; 4365 } 4366 4367 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4368 struct ibmvnic_adapter *adapter) 4369 { 4370 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4371 struct net_device *netdev = adapter->netdev; 4372 struct device *dev = &adapter->vdev->dev; 4373 u64 *u64_crq = (u64 *)crq; 4374 long rc; 4375 4376 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4377 (unsigned long int)cpu_to_be64(u64_crq[0]), 4378 (unsigned long int)cpu_to_be64(u64_crq[1])); 4379 switch (gen_crq->first) { 4380 case IBMVNIC_CRQ_INIT_RSP: 4381 switch (gen_crq->cmd) { 4382 case IBMVNIC_CRQ_INIT: 4383 dev_info(dev, "Partner initialized\n"); 4384 adapter->from_passive_init = true; 4385 adapter->failover_pending = false; 4386 if (!completion_done(&adapter->init_done)) { 4387 complete(&adapter->init_done); 4388 adapter->init_done_rc = -EIO; 4389 } 4390 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4391 break; 4392 case IBMVNIC_CRQ_INIT_COMPLETE: 4393 dev_info(dev, "Partner initialization complete\n"); 4394 adapter->crq.active = true; 4395 send_version_xchg(adapter); 4396 break; 4397 default: 4398 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4399 } 4400 return; 4401 case IBMVNIC_CRQ_XPORT_EVENT: 4402 netif_carrier_off(netdev); 4403 adapter->crq.active = false; 4404 if (adapter->resetting) 4405 adapter->force_reset_recovery = true; 4406 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4407 dev_info(dev, "Migrated, re-enabling adapter\n"); 4408 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4409 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4410 dev_info(dev, "Backing device failover detected\n"); 4411 adapter->failover_pending = true; 4412 } else { 4413 /* The adapter lost the connection */ 4414 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4415 gen_crq->cmd); 4416 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4417 } 4418 return; 4419 case IBMVNIC_CRQ_CMD_RSP: 4420 break; 4421 default: 4422 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4423 gen_crq->first); 4424 return; 4425 } 4426 4427 switch (gen_crq->cmd) { 4428 case VERSION_EXCHANGE_RSP: 4429 rc = crq->version_exchange_rsp.rc.code; 4430 if (rc) { 4431 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4432 break; 4433 } 4434 dev_info(dev, "Partner protocol version is %d\n", 4435 crq->version_exchange_rsp.version); 4436 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4437 ibmvnic_version) 4438 ibmvnic_version = 4439 be16_to_cpu(crq->version_exchange_rsp.version); 4440 send_cap_queries(adapter); 4441 break; 4442 case QUERY_CAPABILITY_RSP: 4443 handle_query_cap_rsp(crq, adapter); 4444 break; 4445 case QUERY_MAP_RSP: 4446 handle_query_map_rsp(crq, adapter); 4447 break; 4448 case REQUEST_MAP_RSP: 4449 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4450 complete(&adapter->fw_done); 4451 break; 4452 case REQUEST_UNMAP_RSP: 4453 handle_request_unmap_rsp(crq, adapter); 4454 break; 4455 case REQUEST_CAPABILITY_RSP: 4456 handle_request_cap_rsp(crq, adapter); 4457 break; 4458 case LOGIN_RSP: 4459 netdev_dbg(netdev, "Got Login Response\n"); 4460 handle_login_rsp(crq, adapter); 4461 break; 4462 case LOGICAL_LINK_STATE_RSP: 4463 netdev_dbg(netdev, 4464 "Got Logical Link State Response, state: %d rc: %d\n", 4465 crq->logical_link_state_rsp.link_state, 4466 crq->logical_link_state_rsp.rc.code); 4467 adapter->logical_link_state = 4468 crq->logical_link_state_rsp.link_state; 4469 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4470 complete(&adapter->init_done); 4471 break; 4472 case LINK_STATE_INDICATION: 4473 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4474 adapter->phys_link_state = 4475 crq->link_state_indication.phys_link_state; 4476 adapter->logical_link_state = 4477 crq->link_state_indication.logical_link_state; 4478 if (adapter->phys_link_state && adapter->logical_link_state) 4479 netif_carrier_on(netdev); 4480 else 4481 netif_carrier_off(netdev); 4482 break; 4483 case CHANGE_MAC_ADDR_RSP: 4484 netdev_dbg(netdev, "Got MAC address change Response\n"); 4485 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4486 break; 4487 case ERROR_INDICATION: 4488 netdev_dbg(netdev, "Got Error Indication\n"); 4489 handle_error_indication(crq, adapter); 4490 break; 4491 case REQUEST_STATISTICS_RSP: 4492 netdev_dbg(netdev, "Got Statistics Response\n"); 4493 complete(&adapter->stats_done); 4494 break; 4495 case QUERY_IP_OFFLOAD_RSP: 4496 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4497 handle_query_ip_offload_rsp(adapter); 4498 break; 4499 case MULTICAST_CTRL_RSP: 4500 netdev_dbg(netdev, "Got multicast control Response\n"); 4501 break; 4502 case CONTROL_IP_OFFLOAD_RSP: 4503 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4504 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4505 sizeof(adapter->ip_offload_ctrl), 4506 DMA_TO_DEVICE); 4507 complete(&adapter->init_done); 4508 break; 4509 case COLLECT_FW_TRACE_RSP: 4510 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4511 complete(&adapter->fw_done); 4512 break; 4513 case GET_VPD_SIZE_RSP: 4514 handle_vpd_size_rsp(crq, adapter); 4515 break; 4516 case GET_VPD_RSP: 4517 handle_vpd_rsp(crq, adapter); 4518 break; 4519 case QUERY_PHYS_PARMS_RSP: 4520 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4521 complete(&adapter->fw_done); 4522 break; 4523 default: 4524 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4525 gen_crq->cmd); 4526 } 4527 } 4528 4529 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4530 { 4531 struct ibmvnic_adapter *adapter = instance; 4532 4533 tasklet_schedule(&adapter->tasklet); 4534 return IRQ_HANDLED; 4535 } 4536 4537 static void ibmvnic_tasklet(void *data) 4538 { 4539 struct ibmvnic_adapter *adapter = data; 4540 struct ibmvnic_crq_queue *queue = &adapter->crq; 4541 union ibmvnic_crq *crq; 4542 unsigned long flags; 4543 bool done = false; 4544 4545 spin_lock_irqsave(&queue->lock, flags); 4546 while (!done) { 4547 /* Pull all the valid messages off the CRQ */ 4548 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4549 ibmvnic_handle_crq(crq, adapter); 4550 crq->generic.first = 0; 4551 } 4552 4553 /* remain in tasklet until all 4554 * capabilities responses are received 4555 */ 4556 if (!adapter->wait_capability) 4557 done = true; 4558 } 4559 /* if capabilities CRQ's were sent in this tasklet, the following 4560 * tasklet must wait until all responses are received 4561 */ 4562 if (atomic_read(&adapter->running_cap_crqs) != 0) 4563 adapter->wait_capability = true; 4564 spin_unlock_irqrestore(&queue->lock, flags); 4565 } 4566 4567 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4568 { 4569 struct vio_dev *vdev = adapter->vdev; 4570 int rc; 4571 4572 do { 4573 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4574 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4575 4576 if (rc) 4577 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4578 4579 return rc; 4580 } 4581 4582 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4583 { 4584 struct ibmvnic_crq_queue *crq = &adapter->crq; 4585 struct device *dev = &adapter->vdev->dev; 4586 struct vio_dev *vdev = adapter->vdev; 4587 int rc; 4588 4589 /* Close the CRQ */ 4590 do { 4591 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4592 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4593 4594 /* Clean out the queue */ 4595 memset(crq->msgs, 0, PAGE_SIZE); 4596 crq->cur = 0; 4597 crq->active = false; 4598 4599 /* And re-open it again */ 4600 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4601 crq->msg_token, PAGE_SIZE); 4602 4603 if (rc == H_CLOSED) 4604 /* Adapter is good, but other end is not ready */ 4605 dev_warn(dev, "Partner adapter not ready\n"); 4606 else if (rc != 0) 4607 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4608 4609 return rc; 4610 } 4611 4612 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4613 { 4614 struct ibmvnic_crq_queue *crq = &adapter->crq; 4615 struct vio_dev *vdev = adapter->vdev; 4616 long rc; 4617 4618 if (!crq->msgs) 4619 return; 4620 4621 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4622 free_irq(vdev->irq, adapter); 4623 tasklet_kill(&adapter->tasklet); 4624 do { 4625 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4626 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4627 4628 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4629 DMA_BIDIRECTIONAL); 4630 free_page((unsigned long)crq->msgs); 4631 crq->msgs = NULL; 4632 crq->active = false; 4633 } 4634 4635 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4636 { 4637 struct ibmvnic_crq_queue *crq = &adapter->crq; 4638 struct device *dev = &adapter->vdev->dev; 4639 struct vio_dev *vdev = adapter->vdev; 4640 int rc, retrc = -ENOMEM; 4641 4642 if (crq->msgs) 4643 return 0; 4644 4645 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4646 /* Should we allocate more than one page? */ 4647 4648 if (!crq->msgs) 4649 return -ENOMEM; 4650 4651 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4652 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4653 DMA_BIDIRECTIONAL); 4654 if (dma_mapping_error(dev, crq->msg_token)) 4655 goto map_failed; 4656 4657 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4658 crq->msg_token, PAGE_SIZE); 4659 4660 if (rc == H_RESOURCE) 4661 /* maybe kexecing and resource is busy. try a reset */ 4662 rc = ibmvnic_reset_crq(adapter); 4663 retrc = rc; 4664 4665 if (rc == H_CLOSED) { 4666 dev_warn(dev, "Partner adapter not ready\n"); 4667 } else if (rc) { 4668 dev_warn(dev, "Error %d opening adapter\n", rc); 4669 goto reg_crq_failed; 4670 } 4671 4672 retrc = 0; 4673 4674 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4675 (unsigned long)adapter); 4676 4677 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4678 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4679 adapter->vdev->unit_address); 4680 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4681 if (rc) { 4682 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4683 vdev->irq, rc); 4684 goto req_irq_failed; 4685 } 4686 4687 rc = vio_enable_interrupts(vdev); 4688 if (rc) { 4689 dev_err(dev, "Error %d enabling interrupts\n", rc); 4690 goto req_irq_failed; 4691 } 4692 4693 crq->cur = 0; 4694 spin_lock_init(&crq->lock); 4695 4696 return retrc; 4697 4698 req_irq_failed: 4699 tasklet_kill(&adapter->tasklet); 4700 do { 4701 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4702 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4703 reg_crq_failed: 4704 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4705 map_failed: 4706 free_page((unsigned long)crq->msgs); 4707 crq->msgs = NULL; 4708 return retrc; 4709 } 4710 4711 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4712 { 4713 struct device *dev = &adapter->vdev->dev; 4714 unsigned long timeout = msecs_to_jiffies(30000); 4715 u64 old_num_rx_queues, old_num_tx_queues; 4716 int rc; 4717 4718 adapter->from_passive_init = false; 4719 4720 old_num_rx_queues = adapter->req_rx_queues; 4721 old_num_tx_queues = adapter->req_tx_queues; 4722 4723 reinit_completion(&adapter->init_done); 4724 adapter->init_done_rc = 0; 4725 ibmvnic_send_crq_init(adapter); 4726 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4727 dev_err(dev, "Initialization sequence timed out\n"); 4728 return -1; 4729 } 4730 4731 if (adapter->init_done_rc) { 4732 release_crq_queue(adapter); 4733 return adapter->init_done_rc; 4734 } 4735 4736 if (adapter->from_passive_init) { 4737 adapter->state = VNIC_OPEN; 4738 adapter->from_passive_init = false; 4739 return -1; 4740 } 4741 4742 if (adapter->resetting && !adapter->wait_for_reset && 4743 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4744 if (adapter->req_rx_queues != old_num_rx_queues || 4745 adapter->req_tx_queues != old_num_tx_queues) { 4746 release_sub_crqs(adapter, 0); 4747 rc = init_sub_crqs(adapter); 4748 } else { 4749 rc = reset_sub_crq_queues(adapter); 4750 } 4751 } else { 4752 rc = init_sub_crqs(adapter); 4753 } 4754 4755 if (rc) { 4756 dev_err(dev, "Initialization of sub crqs failed\n"); 4757 release_crq_queue(adapter); 4758 return rc; 4759 } 4760 4761 rc = init_sub_crq_irqs(adapter); 4762 if (rc) { 4763 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4764 release_crq_queue(adapter); 4765 } 4766 4767 return rc; 4768 } 4769 4770 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4771 { 4772 struct device *dev = &adapter->vdev->dev; 4773 unsigned long timeout = msecs_to_jiffies(30000); 4774 int rc; 4775 4776 adapter->from_passive_init = false; 4777 4778 adapter->init_done_rc = 0; 4779 ibmvnic_send_crq_init(adapter); 4780 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4781 dev_err(dev, "Initialization sequence timed out\n"); 4782 return -1; 4783 } 4784 4785 if (adapter->init_done_rc) { 4786 release_crq_queue(adapter); 4787 return adapter->init_done_rc; 4788 } 4789 4790 if (adapter->from_passive_init) { 4791 adapter->state = VNIC_OPEN; 4792 adapter->from_passive_init = false; 4793 return -1; 4794 } 4795 4796 rc = init_sub_crqs(adapter); 4797 if (rc) { 4798 dev_err(dev, "Initialization of sub crqs failed\n"); 4799 release_crq_queue(adapter); 4800 return rc; 4801 } 4802 4803 rc = init_sub_crq_irqs(adapter); 4804 if (rc) { 4805 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4806 release_crq_queue(adapter); 4807 } 4808 4809 return rc; 4810 } 4811 4812 static struct device_attribute dev_attr_failover; 4813 4814 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4815 { 4816 struct ibmvnic_adapter *adapter; 4817 struct net_device *netdev; 4818 unsigned char *mac_addr_p; 4819 int rc; 4820 4821 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4822 dev->unit_address); 4823 4824 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4825 VETH_MAC_ADDR, NULL); 4826 if (!mac_addr_p) { 4827 dev_err(&dev->dev, 4828 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4829 __FILE__, __LINE__); 4830 return 0; 4831 } 4832 4833 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4834 IBMVNIC_MAX_QUEUES); 4835 if (!netdev) 4836 return -ENOMEM; 4837 4838 adapter = netdev_priv(netdev); 4839 adapter->state = VNIC_PROBING; 4840 dev_set_drvdata(&dev->dev, netdev); 4841 adapter->vdev = dev; 4842 adapter->netdev = netdev; 4843 4844 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4845 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4846 netdev->irq = dev->irq; 4847 netdev->netdev_ops = &ibmvnic_netdev_ops; 4848 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4849 SET_NETDEV_DEV(netdev, &dev->dev); 4850 4851 spin_lock_init(&adapter->stats_lock); 4852 4853 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4854 INIT_LIST_HEAD(&adapter->rwi_list); 4855 spin_lock_init(&adapter->rwi_lock); 4856 init_completion(&adapter->init_done); 4857 adapter->resetting = false; 4858 4859 do { 4860 rc = init_crq_queue(adapter); 4861 if (rc) { 4862 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4863 rc); 4864 goto ibmvnic_init_fail; 4865 } 4866 4867 rc = ibmvnic_init(adapter); 4868 if (rc && rc != EAGAIN) 4869 goto ibmvnic_init_fail; 4870 } while (rc == EAGAIN); 4871 4872 rc = init_stats_buffers(adapter); 4873 if (rc) 4874 goto ibmvnic_init_fail; 4875 4876 rc = init_stats_token(adapter); 4877 if (rc) 4878 goto ibmvnic_stats_fail; 4879 4880 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4881 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4882 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4883 4884 rc = device_create_file(&dev->dev, &dev_attr_failover); 4885 if (rc) 4886 goto ibmvnic_dev_file_err; 4887 4888 netif_carrier_off(netdev); 4889 rc = register_netdev(netdev); 4890 if (rc) { 4891 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4892 goto ibmvnic_register_fail; 4893 } 4894 dev_info(&dev->dev, "ibmvnic registered\n"); 4895 4896 adapter->state = VNIC_PROBED; 4897 4898 adapter->wait_for_reset = false; 4899 4900 return 0; 4901 4902 ibmvnic_register_fail: 4903 device_remove_file(&dev->dev, &dev_attr_failover); 4904 4905 ibmvnic_dev_file_err: 4906 release_stats_token(adapter); 4907 4908 ibmvnic_stats_fail: 4909 release_stats_buffers(adapter); 4910 4911 ibmvnic_init_fail: 4912 release_sub_crqs(adapter, 1); 4913 release_crq_queue(adapter); 4914 free_netdev(netdev); 4915 4916 return rc; 4917 } 4918 4919 static int ibmvnic_remove(struct vio_dev *dev) 4920 { 4921 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4922 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4923 4924 adapter->state = VNIC_REMOVING; 4925 rtnl_lock(); 4926 unregister_netdevice(netdev); 4927 4928 release_resources(adapter); 4929 release_sub_crqs(adapter, 1); 4930 release_crq_queue(adapter); 4931 4932 release_stats_token(adapter); 4933 release_stats_buffers(adapter); 4934 4935 adapter->state = VNIC_REMOVED; 4936 4937 rtnl_unlock(); 4938 device_remove_file(&dev->dev, &dev_attr_failover); 4939 free_netdev(netdev); 4940 dev_set_drvdata(&dev->dev, NULL); 4941 4942 return 0; 4943 } 4944 4945 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4946 const char *buf, size_t count) 4947 { 4948 struct net_device *netdev = dev_get_drvdata(dev); 4949 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4950 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4951 __be64 session_token; 4952 long rc; 4953 4954 if (!sysfs_streq(buf, "1")) 4955 return -EINVAL; 4956 4957 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4958 H_GET_SESSION_TOKEN, 0, 0, 0); 4959 if (rc) { 4960 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4961 rc); 4962 return -EINVAL; 4963 } 4964 4965 session_token = (__be64)retbuf[0]; 4966 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4967 be64_to_cpu(session_token)); 4968 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4969 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4970 if (rc) { 4971 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4972 rc); 4973 return -EINVAL; 4974 } 4975 4976 return count; 4977 } 4978 4979 static DEVICE_ATTR_WO(failover); 4980 4981 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4982 { 4983 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4984 struct ibmvnic_adapter *adapter; 4985 struct iommu_table *tbl; 4986 unsigned long ret = 0; 4987 int i; 4988 4989 tbl = get_iommu_table_base(&vdev->dev); 4990 4991 /* netdev inits at probe time along with the structures we need below*/ 4992 if (!netdev) 4993 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4994 4995 adapter = netdev_priv(netdev); 4996 4997 ret += PAGE_SIZE; /* the crq message queue */ 4998 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4999 5000 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5001 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5002 5003 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5004 i++) 5005 ret += adapter->rx_pool[i].size * 5006 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5007 5008 return ret; 5009 } 5010 5011 static int ibmvnic_resume(struct device *dev) 5012 { 5013 struct net_device *netdev = dev_get_drvdata(dev); 5014 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5015 5016 if (adapter->state != VNIC_OPEN) 5017 return 0; 5018 5019 tasklet_schedule(&adapter->tasklet); 5020 5021 return 0; 5022 } 5023 5024 static const struct vio_device_id ibmvnic_device_table[] = { 5025 {"network", "IBM,vnic"}, 5026 {"", "" } 5027 }; 5028 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5029 5030 static const struct dev_pm_ops ibmvnic_pm_ops = { 5031 .resume = ibmvnic_resume 5032 }; 5033 5034 static struct vio_driver ibmvnic_driver = { 5035 .id_table = ibmvnic_device_table, 5036 .probe = ibmvnic_probe, 5037 .remove = ibmvnic_remove, 5038 .get_desired_dma = ibmvnic_get_desired_dma, 5039 .name = ibmvnic_driver_name, 5040 .pm = &ibmvnic_pm_ops, 5041 }; 5042 5043 /* module functions */ 5044 static int __init ibmvnic_module_init(void) 5045 { 5046 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5047 IBMVNIC_DRIVER_VERSION); 5048 5049 return vio_register_driver(&ibmvnic_driver); 5050 } 5051 5052 static void __exit ibmvnic_module_exit(void) 5053 { 5054 vio_unregister_driver(&ibmvnic_driver); 5055 } 5056 5057 module_init(ibmvnic_module_init); 5058 module_exit(ibmvnic_module_exit); 5059