1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 88 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 89 static int enable_scrq_irq(struct ibmvnic_adapter *, 90 struct ibmvnic_sub_crq_queue *); 91 static int disable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int pending_scrq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static int ibmvnic_poll(struct napi_struct *napi, int data); 98 static void send_query_map(struct ibmvnic_adapter *adapter); 99 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 100 static int send_request_unmap(struct ibmvnic_adapter *, u8); 101 static int send_login(struct ibmvnic_adapter *adapter); 102 static void send_query_cap(struct ibmvnic_adapter *adapter); 103 static int init_sub_crqs(struct ibmvnic_adapter *); 104 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 105 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 106 static void release_crq_queue(struct ibmvnic_adapter *); 107 static int __ibmvnic_set_mac(struct net_device *, u8 *); 108 static int init_crq_queue(struct ibmvnic_adapter *adapter); 109 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 110 111 struct ibmvnic_stat { 112 char name[ETH_GSTRING_LEN]; 113 int offset; 114 }; 115 116 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 117 offsetof(struct ibmvnic_statistics, stat)) 118 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 119 120 static const struct ibmvnic_stat ibmvnic_stats[] = { 121 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 122 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 123 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 124 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 125 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 126 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 127 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 128 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 129 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 130 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 131 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 132 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 133 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 134 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 135 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 136 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 137 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 138 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 139 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 140 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 141 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 142 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 143 }; 144 145 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 146 unsigned long length, unsigned long *number, 147 unsigned long *irq) 148 { 149 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 150 long rc; 151 152 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 153 *number = retbuf[0]; 154 *irq = retbuf[1]; 155 156 return rc; 157 } 158 159 /** 160 * ibmvnic_wait_for_completion - Check device state and wait for completion 161 * @adapter: private device data 162 * @comp_done: completion structure to wait for 163 * @timeout: time to wait in milliseconds 164 * 165 * Wait for a completion signal or until the timeout limit is reached 166 * while checking that the device is still active. 167 */ 168 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 169 struct completion *comp_done, 170 unsigned long timeout) 171 { 172 struct net_device *netdev; 173 unsigned long div_timeout; 174 u8 retry; 175 176 netdev = adapter->netdev; 177 retry = 5; 178 div_timeout = msecs_to_jiffies(timeout / retry); 179 while (true) { 180 if (!adapter->crq.active) { 181 netdev_err(netdev, "Device down!\n"); 182 return -ENODEV; 183 } 184 if (!retry--) 185 break; 186 if (wait_for_completion_timeout(comp_done, div_timeout)) 187 return 0; 188 } 189 netdev_err(netdev, "Operation timed out.\n"); 190 return -ETIMEDOUT; 191 } 192 193 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 194 struct ibmvnic_long_term_buff *ltb, int size) 195 { 196 struct device *dev = &adapter->vdev->dev; 197 int rc; 198 199 ltb->size = size; 200 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 201 GFP_KERNEL); 202 203 if (!ltb->buff) { 204 dev_err(dev, "Couldn't alloc long term buffer\n"); 205 return -ENOMEM; 206 } 207 ltb->map_id = adapter->map_id; 208 adapter->map_id++; 209 210 mutex_lock(&adapter->fw_lock); 211 adapter->fw_done_rc = 0; 212 reinit_completion(&adapter->fw_done); 213 rc = send_request_map(adapter, ltb->addr, 214 ltb->size, ltb->map_id); 215 if (rc) { 216 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 217 mutex_unlock(&adapter->fw_lock); 218 return rc; 219 } 220 221 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 222 if (rc) { 223 dev_err(dev, 224 "Long term map request aborted or timed out,rc = %d\n", 225 rc); 226 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 227 mutex_unlock(&adapter->fw_lock); 228 return rc; 229 } 230 231 if (adapter->fw_done_rc) { 232 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 233 adapter->fw_done_rc); 234 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 235 mutex_unlock(&adapter->fw_lock); 236 return -1; 237 } 238 mutex_unlock(&adapter->fw_lock); 239 return 0; 240 } 241 242 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 243 struct ibmvnic_long_term_buff *ltb) 244 { 245 struct device *dev = &adapter->vdev->dev; 246 247 if (!ltb->buff) 248 return; 249 250 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 251 adapter->reset_reason != VNIC_RESET_MOBILITY) 252 send_request_unmap(adapter, ltb->map_id); 253 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 254 } 255 256 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 257 struct ibmvnic_long_term_buff *ltb) 258 { 259 struct device *dev = &adapter->vdev->dev; 260 int rc; 261 262 memset(ltb->buff, 0, ltb->size); 263 264 mutex_lock(&adapter->fw_lock); 265 adapter->fw_done_rc = 0; 266 267 reinit_completion(&adapter->fw_done); 268 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 269 if (rc) { 270 mutex_unlock(&adapter->fw_lock); 271 return rc; 272 } 273 274 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 275 if (rc) { 276 dev_info(dev, 277 "Reset failed, long term map request timed out or aborted\n"); 278 mutex_unlock(&adapter->fw_lock); 279 return rc; 280 } 281 282 if (adapter->fw_done_rc) { 283 dev_info(dev, 284 "Reset failed, attempting to free and reallocate buffer\n"); 285 free_long_term_buff(adapter, ltb); 286 mutex_unlock(&adapter->fw_lock); 287 return alloc_long_term_buff(adapter, ltb, ltb->size); 288 } 289 mutex_unlock(&adapter->fw_lock); 290 return 0; 291 } 292 293 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 294 { 295 int i; 296 297 for (i = 0; i < adapter->num_active_rx_pools; i++) 298 adapter->rx_pool[i].active = 0; 299 } 300 301 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 302 struct ibmvnic_rx_pool *pool) 303 { 304 int count = pool->size - atomic_read(&pool->available); 305 u64 handle = adapter->rx_scrq[pool->index]->handle; 306 struct device *dev = &adapter->vdev->dev; 307 struct ibmvnic_ind_xmit_queue *ind_bufp; 308 struct ibmvnic_sub_crq_queue *rx_scrq; 309 union sub_crq *sub_crq; 310 int buffers_added = 0; 311 unsigned long lpar_rc; 312 struct sk_buff *skb; 313 unsigned int offset; 314 dma_addr_t dma_addr; 315 unsigned char *dst; 316 int shift = 0; 317 int index; 318 int i; 319 320 if (!pool->active) 321 return; 322 323 rx_scrq = adapter->rx_scrq[pool->index]; 324 ind_bufp = &rx_scrq->ind_buf; 325 for (i = 0; i < count; ++i) { 326 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 327 if (!skb) { 328 dev_err(dev, "Couldn't replenish rx buff\n"); 329 adapter->replenish_no_mem++; 330 break; 331 } 332 333 index = pool->free_map[pool->next_free]; 334 335 if (pool->rx_buff[index].skb) 336 dev_err(dev, "Inconsistent free_map!\n"); 337 338 /* Copy the skb to the long term mapped DMA buffer */ 339 offset = index * pool->buff_size; 340 dst = pool->long_term_buff.buff + offset; 341 memset(dst, 0, pool->buff_size); 342 dma_addr = pool->long_term_buff.addr + offset; 343 pool->rx_buff[index].data = dst; 344 345 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 346 pool->rx_buff[index].dma = dma_addr; 347 pool->rx_buff[index].skb = skb; 348 pool->rx_buff[index].pool_index = pool->index; 349 pool->rx_buff[index].size = pool->buff_size; 350 351 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 352 memset(sub_crq, 0, sizeof(*sub_crq)); 353 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 354 sub_crq->rx_add.correlator = 355 cpu_to_be64((u64)&pool->rx_buff[index]); 356 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 357 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 358 359 /* The length field of the sCRQ is defined to be 24 bits so the 360 * buffer size needs to be left shifted by a byte before it is 361 * converted to big endian to prevent the last byte from being 362 * truncated. 363 */ 364 #ifdef __LITTLE_ENDIAN__ 365 shift = 8; 366 #endif 367 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 368 pool->next_free = (pool->next_free + 1) % pool->size; 369 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 370 i == count - 1) { 371 lpar_rc = 372 send_subcrq_indirect(adapter, handle, 373 (u64)ind_bufp->indir_dma, 374 (u64)ind_bufp->index); 375 if (lpar_rc != H_SUCCESS) 376 goto failure; 377 buffers_added += ind_bufp->index; 378 adapter->replenish_add_buff_success += ind_bufp->index; 379 ind_bufp->index = 0; 380 } 381 } 382 atomic_add(buffers_added, &pool->available); 383 return; 384 385 failure: 386 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 387 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 388 for (i = ind_bufp->index - 1; i >= 0; --i) { 389 struct ibmvnic_rx_buff *rx_buff; 390 391 pool->next_free = pool->next_free == 0 ? 392 pool->size - 1 : pool->next_free - 1; 393 sub_crq = &ind_bufp->indir_arr[i]; 394 rx_buff = (struct ibmvnic_rx_buff *) 395 be64_to_cpu(sub_crq->rx_add.correlator); 396 index = (int)(rx_buff - pool->rx_buff); 397 pool->free_map[pool->next_free] = index; 398 dev_kfree_skb_any(pool->rx_buff[index].skb); 399 pool->rx_buff[index].skb = NULL; 400 } 401 ind_bufp->index = 0; 402 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 403 /* Disable buffer pool replenishment and report carrier off if 404 * queue is closed or pending failover. 405 * Firmware guarantees that a signal will be sent to the 406 * driver, triggering a reset. 407 */ 408 deactivate_rx_pools(adapter); 409 netif_carrier_off(adapter->netdev); 410 } 411 } 412 413 static void replenish_pools(struct ibmvnic_adapter *adapter) 414 { 415 int i; 416 417 adapter->replenish_task_cycles++; 418 for (i = 0; i < adapter->num_active_rx_pools; i++) { 419 if (adapter->rx_pool[i].active) 420 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 421 } 422 } 423 424 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 425 { 426 kfree(adapter->tx_stats_buffers); 427 kfree(adapter->rx_stats_buffers); 428 adapter->tx_stats_buffers = NULL; 429 adapter->rx_stats_buffers = NULL; 430 } 431 432 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 433 { 434 adapter->tx_stats_buffers = 435 kcalloc(IBMVNIC_MAX_QUEUES, 436 sizeof(struct ibmvnic_tx_queue_stats), 437 GFP_KERNEL); 438 if (!adapter->tx_stats_buffers) 439 return -ENOMEM; 440 441 adapter->rx_stats_buffers = 442 kcalloc(IBMVNIC_MAX_QUEUES, 443 sizeof(struct ibmvnic_rx_queue_stats), 444 GFP_KERNEL); 445 if (!adapter->rx_stats_buffers) 446 return -ENOMEM; 447 448 return 0; 449 } 450 451 static void release_stats_token(struct ibmvnic_adapter *adapter) 452 { 453 struct device *dev = &adapter->vdev->dev; 454 455 if (!adapter->stats_token) 456 return; 457 458 dma_unmap_single(dev, adapter->stats_token, 459 sizeof(struct ibmvnic_statistics), 460 DMA_FROM_DEVICE); 461 adapter->stats_token = 0; 462 } 463 464 static int init_stats_token(struct ibmvnic_adapter *adapter) 465 { 466 struct device *dev = &adapter->vdev->dev; 467 dma_addr_t stok; 468 469 stok = dma_map_single(dev, &adapter->stats, 470 sizeof(struct ibmvnic_statistics), 471 DMA_FROM_DEVICE); 472 if (dma_mapping_error(dev, stok)) { 473 dev_err(dev, "Couldn't map stats buffer\n"); 474 return -1; 475 } 476 477 adapter->stats_token = stok; 478 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 479 return 0; 480 } 481 482 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 483 { 484 struct ibmvnic_rx_pool *rx_pool; 485 u64 buff_size; 486 int rx_scrqs; 487 int i, j, rc; 488 489 if (!adapter->rx_pool) 490 return -1; 491 492 buff_size = adapter->cur_rx_buf_sz; 493 rx_scrqs = adapter->num_active_rx_pools; 494 for (i = 0; i < rx_scrqs; i++) { 495 rx_pool = &adapter->rx_pool[i]; 496 497 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 498 499 if (rx_pool->buff_size != buff_size) { 500 free_long_term_buff(adapter, &rx_pool->long_term_buff); 501 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 502 rc = alloc_long_term_buff(adapter, 503 &rx_pool->long_term_buff, 504 rx_pool->size * 505 rx_pool->buff_size); 506 } else { 507 rc = reset_long_term_buff(adapter, 508 &rx_pool->long_term_buff); 509 } 510 511 if (rc) 512 return rc; 513 514 for (j = 0; j < rx_pool->size; j++) 515 rx_pool->free_map[j] = j; 516 517 memset(rx_pool->rx_buff, 0, 518 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 519 520 atomic_set(&rx_pool->available, 0); 521 rx_pool->next_alloc = 0; 522 rx_pool->next_free = 0; 523 rx_pool->active = 1; 524 } 525 526 return 0; 527 } 528 529 static void release_rx_pools(struct ibmvnic_adapter *adapter) 530 { 531 struct ibmvnic_rx_pool *rx_pool; 532 int i, j; 533 534 if (!adapter->rx_pool) 535 return; 536 537 for (i = 0; i < adapter->num_active_rx_pools; i++) { 538 rx_pool = &adapter->rx_pool[i]; 539 540 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 541 542 kfree(rx_pool->free_map); 543 free_long_term_buff(adapter, &rx_pool->long_term_buff); 544 545 if (!rx_pool->rx_buff) 546 continue; 547 548 for (j = 0; j < rx_pool->size; j++) { 549 if (rx_pool->rx_buff[j].skb) { 550 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 551 rx_pool->rx_buff[j].skb = NULL; 552 } 553 } 554 555 kfree(rx_pool->rx_buff); 556 } 557 558 kfree(adapter->rx_pool); 559 adapter->rx_pool = NULL; 560 adapter->num_active_rx_pools = 0; 561 } 562 563 static int init_rx_pools(struct net_device *netdev) 564 { 565 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 566 struct device *dev = &adapter->vdev->dev; 567 struct ibmvnic_rx_pool *rx_pool; 568 int rxadd_subcrqs; 569 u64 buff_size; 570 int i, j; 571 572 rxadd_subcrqs = adapter->num_active_rx_scrqs; 573 buff_size = adapter->cur_rx_buf_sz; 574 575 adapter->rx_pool = kcalloc(rxadd_subcrqs, 576 sizeof(struct ibmvnic_rx_pool), 577 GFP_KERNEL); 578 if (!adapter->rx_pool) { 579 dev_err(dev, "Failed to allocate rx pools\n"); 580 return -1; 581 } 582 583 adapter->num_active_rx_pools = rxadd_subcrqs; 584 585 for (i = 0; i < rxadd_subcrqs; i++) { 586 rx_pool = &adapter->rx_pool[i]; 587 588 netdev_dbg(adapter->netdev, 589 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 590 i, adapter->req_rx_add_entries_per_subcrq, 591 buff_size); 592 593 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 594 rx_pool->index = i; 595 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 596 rx_pool->active = 1; 597 598 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 599 GFP_KERNEL); 600 if (!rx_pool->free_map) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 rx_pool->rx_buff = kcalloc(rx_pool->size, 606 sizeof(struct ibmvnic_rx_buff), 607 GFP_KERNEL); 608 if (!rx_pool->rx_buff) { 609 dev_err(dev, "Couldn't alloc rx buffers\n"); 610 release_rx_pools(adapter); 611 return -1; 612 } 613 614 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 615 rx_pool->size * rx_pool->buff_size)) { 616 release_rx_pools(adapter); 617 return -1; 618 } 619 620 for (j = 0; j < rx_pool->size; ++j) 621 rx_pool->free_map[j] = j; 622 623 atomic_set(&rx_pool->available, 0); 624 rx_pool->next_alloc = 0; 625 rx_pool->next_free = 0; 626 } 627 628 return 0; 629 } 630 631 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 632 struct ibmvnic_tx_pool *tx_pool) 633 { 634 int rc, i; 635 636 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 637 if (rc) 638 return rc; 639 640 memset(tx_pool->tx_buff, 0, 641 tx_pool->num_buffers * 642 sizeof(struct ibmvnic_tx_buff)); 643 644 for (i = 0; i < tx_pool->num_buffers; i++) 645 tx_pool->free_map[i] = i; 646 647 tx_pool->consumer_index = 0; 648 tx_pool->producer_index = 0; 649 650 return 0; 651 } 652 653 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 654 { 655 int tx_scrqs; 656 int i, rc; 657 658 if (!adapter->tx_pool) 659 return -1; 660 661 tx_scrqs = adapter->num_active_tx_pools; 662 for (i = 0; i < tx_scrqs; i++) { 663 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 664 if (rc) 665 return rc; 666 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 667 if (rc) 668 return rc; 669 } 670 671 return 0; 672 } 673 674 static void release_vpd_data(struct ibmvnic_adapter *adapter) 675 { 676 if (!adapter->vpd) 677 return; 678 679 kfree(adapter->vpd->buff); 680 kfree(adapter->vpd); 681 682 adapter->vpd = NULL; 683 } 684 685 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 686 struct ibmvnic_tx_pool *tx_pool) 687 { 688 kfree(tx_pool->tx_buff); 689 kfree(tx_pool->free_map); 690 free_long_term_buff(adapter, &tx_pool->long_term_buff); 691 } 692 693 static void release_tx_pools(struct ibmvnic_adapter *adapter) 694 { 695 int i; 696 697 if (!adapter->tx_pool) 698 return; 699 700 for (i = 0; i < adapter->num_active_tx_pools; i++) { 701 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 702 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 703 } 704 705 kfree(adapter->tx_pool); 706 adapter->tx_pool = NULL; 707 kfree(adapter->tso_pool); 708 adapter->tso_pool = NULL; 709 adapter->num_active_tx_pools = 0; 710 } 711 712 static int init_one_tx_pool(struct net_device *netdev, 713 struct ibmvnic_tx_pool *tx_pool, 714 int num_entries, int buf_size) 715 { 716 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 717 int i; 718 719 tx_pool->tx_buff = kcalloc(num_entries, 720 sizeof(struct ibmvnic_tx_buff), 721 GFP_KERNEL); 722 if (!tx_pool->tx_buff) 723 return -1; 724 725 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 726 num_entries * buf_size)) 727 return -1; 728 729 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 730 if (!tx_pool->free_map) 731 return -1; 732 733 for (i = 0; i < num_entries; i++) 734 tx_pool->free_map[i] = i; 735 736 tx_pool->consumer_index = 0; 737 tx_pool->producer_index = 0; 738 tx_pool->num_buffers = num_entries; 739 tx_pool->buf_size = buf_size; 740 741 return 0; 742 } 743 744 static int init_tx_pools(struct net_device *netdev) 745 { 746 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 747 int tx_subcrqs; 748 u64 buff_size; 749 int i, rc; 750 751 tx_subcrqs = adapter->num_active_tx_scrqs; 752 adapter->tx_pool = kcalloc(tx_subcrqs, 753 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 754 if (!adapter->tx_pool) 755 return -1; 756 757 adapter->tso_pool = kcalloc(tx_subcrqs, 758 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 759 if (!adapter->tso_pool) 760 return -1; 761 762 adapter->num_active_tx_pools = tx_subcrqs; 763 764 for (i = 0; i < tx_subcrqs; i++) { 765 buff_size = adapter->req_mtu + VLAN_HLEN; 766 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 767 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 768 adapter->req_tx_entries_per_subcrq, 769 buff_size); 770 if (rc) { 771 release_tx_pools(adapter); 772 return rc; 773 } 774 775 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 776 IBMVNIC_TSO_BUFS, 777 IBMVNIC_TSO_BUF_SZ); 778 if (rc) { 779 release_tx_pools(adapter); 780 return rc; 781 } 782 } 783 784 return 0; 785 } 786 787 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 788 { 789 int i; 790 791 if (adapter->napi_enabled) 792 return; 793 794 for (i = 0; i < adapter->req_rx_queues; i++) 795 napi_enable(&adapter->napi[i]); 796 797 adapter->napi_enabled = true; 798 } 799 800 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 801 { 802 int i; 803 804 if (!adapter->napi_enabled) 805 return; 806 807 for (i = 0; i < adapter->req_rx_queues; i++) { 808 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 809 napi_disable(&adapter->napi[i]); 810 } 811 812 adapter->napi_enabled = false; 813 } 814 815 static int init_napi(struct ibmvnic_adapter *adapter) 816 { 817 int i; 818 819 adapter->napi = kcalloc(adapter->req_rx_queues, 820 sizeof(struct napi_struct), GFP_KERNEL); 821 if (!adapter->napi) 822 return -ENOMEM; 823 824 for (i = 0; i < adapter->req_rx_queues; i++) { 825 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 826 netif_napi_add(adapter->netdev, &adapter->napi[i], 827 ibmvnic_poll, NAPI_POLL_WEIGHT); 828 } 829 830 adapter->num_active_rx_napi = adapter->req_rx_queues; 831 return 0; 832 } 833 834 static void release_napi(struct ibmvnic_adapter *adapter) 835 { 836 int i; 837 838 if (!adapter->napi) 839 return; 840 841 for (i = 0; i < adapter->num_active_rx_napi; i++) { 842 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 843 netif_napi_del(&adapter->napi[i]); 844 } 845 846 kfree(adapter->napi); 847 adapter->napi = NULL; 848 adapter->num_active_rx_napi = 0; 849 adapter->napi_enabled = false; 850 } 851 852 static int ibmvnic_login(struct net_device *netdev) 853 { 854 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 855 unsigned long timeout = msecs_to_jiffies(30000); 856 int retry_count = 0; 857 int retries = 10; 858 bool retry; 859 int rc; 860 861 do { 862 retry = false; 863 if (retry_count > retries) { 864 netdev_warn(netdev, "Login attempts exceeded\n"); 865 return -1; 866 } 867 868 adapter->init_done_rc = 0; 869 reinit_completion(&adapter->init_done); 870 rc = send_login(adapter); 871 if (rc) { 872 netdev_warn(netdev, "Unable to login\n"); 873 return rc; 874 } 875 876 if (!wait_for_completion_timeout(&adapter->init_done, 877 timeout)) { 878 netdev_warn(netdev, "Login timed out, retrying...\n"); 879 retry = true; 880 adapter->init_done_rc = 0; 881 retry_count++; 882 continue; 883 } 884 885 if (adapter->init_done_rc == ABORTED) { 886 netdev_warn(netdev, "Login aborted, retrying...\n"); 887 retry = true; 888 adapter->init_done_rc = 0; 889 retry_count++; 890 /* FW or device may be busy, so 891 * wait a bit before retrying login 892 */ 893 msleep(500); 894 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 895 retry_count++; 896 release_sub_crqs(adapter, 1); 897 898 retry = true; 899 netdev_dbg(netdev, 900 "Received partial success, retrying...\n"); 901 adapter->init_done_rc = 0; 902 reinit_completion(&adapter->init_done); 903 send_query_cap(adapter); 904 if (!wait_for_completion_timeout(&adapter->init_done, 905 timeout)) { 906 netdev_warn(netdev, 907 "Capabilities query timed out\n"); 908 return -1; 909 } 910 911 rc = init_sub_crqs(adapter); 912 if (rc) { 913 netdev_warn(netdev, 914 "SCRQ initialization failed\n"); 915 return -1; 916 } 917 918 rc = init_sub_crq_irqs(adapter); 919 if (rc) { 920 netdev_warn(netdev, 921 "SCRQ irq initialization failed\n"); 922 return -1; 923 } 924 } else if (adapter->init_done_rc) { 925 netdev_warn(netdev, "Adapter login failed\n"); 926 return -1; 927 } 928 } while (retry); 929 930 __ibmvnic_set_mac(netdev, adapter->mac_addr); 931 932 return 0; 933 } 934 935 static void release_login_buffer(struct ibmvnic_adapter *adapter) 936 { 937 kfree(adapter->login_buf); 938 adapter->login_buf = NULL; 939 } 940 941 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 942 { 943 kfree(adapter->login_rsp_buf); 944 adapter->login_rsp_buf = NULL; 945 } 946 947 static void release_resources(struct ibmvnic_adapter *adapter) 948 { 949 release_vpd_data(adapter); 950 951 release_tx_pools(adapter); 952 release_rx_pools(adapter); 953 954 release_napi(adapter); 955 release_login_rsp_buffer(adapter); 956 } 957 958 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 959 { 960 struct net_device *netdev = adapter->netdev; 961 unsigned long timeout = msecs_to_jiffies(30000); 962 union ibmvnic_crq crq; 963 bool resend; 964 int rc; 965 966 netdev_dbg(netdev, "setting link state %d\n", link_state); 967 968 memset(&crq, 0, sizeof(crq)); 969 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 970 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 971 crq.logical_link_state.link_state = link_state; 972 973 do { 974 resend = false; 975 976 reinit_completion(&adapter->init_done); 977 rc = ibmvnic_send_crq(adapter, &crq); 978 if (rc) { 979 netdev_err(netdev, "Failed to set link state\n"); 980 return rc; 981 } 982 983 if (!wait_for_completion_timeout(&adapter->init_done, 984 timeout)) { 985 netdev_err(netdev, "timeout setting link state\n"); 986 return -1; 987 } 988 989 if (adapter->init_done_rc == PARTIALSUCCESS) { 990 /* Partuial success, delay and re-send */ 991 mdelay(1000); 992 resend = true; 993 } else if (adapter->init_done_rc) { 994 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 995 adapter->init_done_rc); 996 return adapter->init_done_rc; 997 } 998 } while (resend); 999 1000 return 0; 1001 } 1002 1003 static int set_real_num_queues(struct net_device *netdev) 1004 { 1005 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1006 int rc; 1007 1008 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1009 adapter->req_tx_queues, adapter->req_rx_queues); 1010 1011 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1012 if (rc) { 1013 netdev_err(netdev, "failed to set the number of tx queues\n"); 1014 return rc; 1015 } 1016 1017 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1018 if (rc) 1019 netdev_err(netdev, "failed to set the number of rx queues\n"); 1020 1021 return rc; 1022 } 1023 1024 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1025 { 1026 struct device *dev = &adapter->vdev->dev; 1027 union ibmvnic_crq crq; 1028 int len = 0; 1029 int rc; 1030 1031 if (adapter->vpd->buff) 1032 len = adapter->vpd->len; 1033 1034 mutex_lock(&adapter->fw_lock); 1035 adapter->fw_done_rc = 0; 1036 reinit_completion(&adapter->fw_done); 1037 1038 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1039 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1040 rc = ibmvnic_send_crq(adapter, &crq); 1041 if (rc) { 1042 mutex_unlock(&adapter->fw_lock); 1043 return rc; 1044 } 1045 1046 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1047 if (rc) { 1048 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1049 mutex_unlock(&adapter->fw_lock); 1050 return rc; 1051 } 1052 mutex_unlock(&adapter->fw_lock); 1053 1054 if (!adapter->vpd->len) 1055 return -ENODATA; 1056 1057 if (!adapter->vpd->buff) 1058 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1059 else if (adapter->vpd->len != len) 1060 adapter->vpd->buff = 1061 krealloc(adapter->vpd->buff, 1062 adapter->vpd->len, GFP_KERNEL); 1063 1064 if (!adapter->vpd->buff) { 1065 dev_err(dev, "Could allocate VPD buffer\n"); 1066 return -ENOMEM; 1067 } 1068 1069 adapter->vpd->dma_addr = 1070 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1071 DMA_FROM_DEVICE); 1072 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1073 dev_err(dev, "Could not map VPD buffer\n"); 1074 kfree(adapter->vpd->buff); 1075 adapter->vpd->buff = NULL; 1076 return -ENOMEM; 1077 } 1078 1079 mutex_lock(&adapter->fw_lock); 1080 adapter->fw_done_rc = 0; 1081 reinit_completion(&adapter->fw_done); 1082 1083 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1084 crq.get_vpd.cmd = GET_VPD; 1085 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1086 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1087 rc = ibmvnic_send_crq(adapter, &crq); 1088 if (rc) { 1089 kfree(adapter->vpd->buff); 1090 adapter->vpd->buff = NULL; 1091 mutex_unlock(&adapter->fw_lock); 1092 return rc; 1093 } 1094 1095 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1096 if (rc) { 1097 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1098 kfree(adapter->vpd->buff); 1099 adapter->vpd->buff = NULL; 1100 mutex_unlock(&adapter->fw_lock); 1101 return rc; 1102 } 1103 1104 mutex_unlock(&adapter->fw_lock); 1105 return 0; 1106 } 1107 1108 static int init_resources(struct ibmvnic_adapter *adapter) 1109 { 1110 struct net_device *netdev = adapter->netdev; 1111 int rc; 1112 1113 rc = set_real_num_queues(netdev); 1114 if (rc) 1115 return rc; 1116 1117 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1118 if (!adapter->vpd) 1119 return -ENOMEM; 1120 1121 /* Vital Product Data (VPD) */ 1122 rc = ibmvnic_get_vpd(adapter); 1123 if (rc) { 1124 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1125 return rc; 1126 } 1127 1128 adapter->map_id = 1; 1129 1130 rc = init_napi(adapter); 1131 if (rc) 1132 return rc; 1133 1134 send_query_map(adapter); 1135 1136 rc = init_rx_pools(netdev); 1137 if (rc) 1138 return rc; 1139 1140 rc = init_tx_pools(netdev); 1141 return rc; 1142 } 1143 1144 static int __ibmvnic_open(struct net_device *netdev) 1145 { 1146 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1147 enum vnic_state prev_state = adapter->state; 1148 int i, rc; 1149 1150 adapter->state = VNIC_OPENING; 1151 replenish_pools(adapter); 1152 ibmvnic_napi_enable(adapter); 1153 1154 /* We're ready to receive frames, enable the sub-crq interrupts and 1155 * set the logical link state to up 1156 */ 1157 for (i = 0; i < adapter->req_rx_queues; i++) { 1158 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1159 if (prev_state == VNIC_CLOSED) 1160 enable_irq(adapter->rx_scrq[i]->irq); 1161 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1162 } 1163 1164 for (i = 0; i < adapter->req_tx_queues; i++) { 1165 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1166 if (prev_state == VNIC_CLOSED) 1167 enable_irq(adapter->tx_scrq[i]->irq); 1168 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1169 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1170 } 1171 1172 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1173 if (rc) { 1174 for (i = 0; i < adapter->req_rx_queues; i++) 1175 napi_disable(&adapter->napi[i]); 1176 release_resources(adapter); 1177 return rc; 1178 } 1179 1180 netif_tx_start_all_queues(netdev); 1181 1182 if (prev_state == VNIC_CLOSED) { 1183 for (i = 0; i < adapter->req_rx_queues; i++) 1184 napi_schedule(&adapter->napi[i]); 1185 } 1186 1187 adapter->state = VNIC_OPEN; 1188 return rc; 1189 } 1190 1191 static int ibmvnic_open(struct net_device *netdev) 1192 { 1193 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1194 int rc; 1195 1196 /* If device failover is pending, just set device state and return. 1197 * Device operation will be handled by reset routine. 1198 */ 1199 if (adapter->failover_pending) { 1200 adapter->state = VNIC_OPEN; 1201 return 0; 1202 } 1203 1204 if (adapter->state != VNIC_CLOSED) { 1205 rc = ibmvnic_login(netdev); 1206 if (rc) 1207 goto out; 1208 1209 rc = init_resources(adapter); 1210 if (rc) { 1211 netdev_err(netdev, "failed to initialize resources\n"); 1212 release_resources(adapter); 1213 goto out; 1214 } 1215 } 1216 1217 rc = __ibmvnic_open(netdev); 1218 1219 out: 1220 /* 1221 * If open fails due to a pending failover, set device state and 1222 * return. Device operation will be handled by reset routine. 1223 */ 1224 if (rc && adapter->failover_pending) { 1225 adapter->state = VNIC_OPEN; 1226 rc = 0; 1227 } 1228 return rc; 1229 } 1230 1231 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1232 { 1233 struct ibmvnic_rx_pool *rx_pool; 1234 struct ibmvnic_rx_buff *rx_buff; 1235 u64 rx_entries; 1236 int rx_scrqs; 1237 int i, j; 1238 1239 if (!adapter->rx_pool) 1240 return; 1241 1242 rx_scrqs = adapter->num_active_rx_pools; 1243 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1244 1245 /* Free any remaining skbs in the rx buffer pools */ 1246 for (i = 0; i < rx_scrqs; i++) { 1247 rx_pool = &adapter->rx_pool[i]; 1248 if (!rx_pool || !rx_pool->rx_buff) 1249 continue; 1250 1251 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1252 for (j = 0; j < rx_entries; j++) { 1253 rx_buff = &rx_pool->rx_buff[j]; 1254 if (rx_buff && rx_buff->skb) { 1255 dev_kfree_skb_any(rx_buff->skb); 1256 rx_buff->skb = NULL; 1257 } 1258 } 1259 } 1260 } 1261 1262 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1263 struct ibmvnic_tx_pool *tx_pool) 1264 { 1265 struct ibmvnic_tx_buff *tx_buff; 1266 u64 tx_entries; 1267 int i; 1268 1269 if (!tx_pool || !tx_pool->tx_buff) 1270 return; 1271 1272 tx_entries = tx_pool->num_buffers; 1273 1274 for (i = 0; i < tx_entries; i++) { 1275 tx_buff = &tx_pool->tx_buff[i]; 1276 if (tx_buff && tx_buff->skb) { 1277 dev_kfree_skb_any(tx_buff->skb); 1278 tx_buff->skb = NULL; 1279 } 1280 } 1281 } 1282 1283 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1284 { 1285 int tx_scrqs; 1286 int i; 1287 1288 if (!adapter->tx_pool || !adapter->tso_pool) 1289 return; 1290 1291 tx_scrqs = adapter->num_active_tx_pools; 1292 1293 /* Free any remaining skbs in the tx buffer pools */ 1294 for (i = 0; i < tx_scrqs; i++) { 1295 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1296 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1297 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1298 } 1299 } 1300 1301 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1302 { 1303 struct net_device *netdev = adapter->netdev; 1304 int i; 1305 1306 if (adapter->tx_scrq) { 1307 for (i = 0; i < adapter->req_tx_queues; i++) 1308 if (adapter->tx_scrq[i]->irq) { 1309 netdev_dbg(netdev, 1310 "Disabling tx_scrq[%d] irq\n", i); 1311 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1312 disable_irq(adapter->tx_scrq[i]->irq); 1313 } 1314 } 1315 1316 if (adapter->rx_scrq) { 1317 for (i = 0; i < adapter->req_rx_queues; i++) { 1318 if (adapter->rx_scrq[i]->irq) { 1319 netdev_dbg(netdev, 1320 "Disabling rx_scrq[%d] irq\n", i); 1321 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1322 disable_irq(adapter->rx_scrq[i]->irq); 1323 } 1324 } 1325 } 1326 } 1327 1328 static void ibmvnic_cleanup(struct net_device *netdev) 1329 { 1330 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1331 1332 /* ensure that transmissions are stopped if called by do_reset */ 1333 if (test_bit(0, &adapter->resetting)) 1334 netif_tx_disable(netdev); 1335 else 1336 netif_tx_stop_all_queues(netdev); 1337 1338 ibmvnic_napi_disable(adapter); 1339 ibmvnic_disable_irqs(adapter); 1340 1341 clean_rx_pools(adapter); 1342 clean_tx_pools(adapter); 1343 } 1344 1345 static int __ibmvnic_close(struct net_device *netdev) 1346 { 1347 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1348 int rc = 0; 1349 1350 adapter->state = VNIC_CLOSING; 1351 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1352 if (rc) 1353 return rc; 1354 adapter->state = VNIC_CLOSED; 1355 return 0; 1356 } 1357 1358 static int ibmvnic_close(struct net_device *netdev) 1359 { 1360 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1361 int rc; 1362 1363 /* If device failover is pending, just set device state and return. 1364 * Device operation will be handled by reset routine. 1365 */ 1366 if (adapter->failover_pending) { 1367 adapter->state = VNIC_CLOSED; 1368 return 0; 1369 } 1370 1371 rc = __ibmvnic_close(netdev); 1372 ibmvnic_cleanup(netdev); 1373 1374 return rc; 1375 } 1376 1377 /** 1378 * build_hdr_data - creates L2/L3/L4 header data buffer 1379 * @hdr_field - bitfield determining needed headers 1380 * @skb - socket buffer 1381 * @hdr_len - array of header lengths 1382 * @tot_len - total length of data 1383 * 1384 * Reads hdr_field to determine which headers are needed by firmware. 1385 * Builds a buffer containing these headers. Saves individual header 1386 * lengths and total buffer length to be used to build descriptors. 1387 */ 1388 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1389 int *hdr_len, u8 *hdr_data) 1390 { 1391 int len = 0; 1392 u8 *hdr; 1393 1394 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1395 hdr_len[0] = sizeof(struct vlan_ethhdr); 1396 else 1397 hdr_len[0] = sizeof(struct ethhdr); 1398 1399 if (skb->protocol == htons(ETH_P_IP)) { 1400 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1401 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1402 hdr_len[2] = tcp_hdrlen(skb); 1403 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1404 hdr_len[2] = sizeof(struct udphdr); 1405 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1406 hdr_len[1] = sizeof(struct ipv6hdr); 1407 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1408 hdr_len[2] = tcp_hdrlen(skb); 1409 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1410 hdr_len[2] = sizeof(struct udphdr); 1411 } else if (skb->protocol == htons(ETH_P_ARP)) { 1412 hdr_len[1] = arp_hdr_len(skb->dev); 1413 hdr_len[2] = 0; 1414 } 1415 1416 memset(hdr_data, 0, 120); 1417 if ((hdr_field >> 6) & 1) { 1418 hdr = skb_mac_header(skb); 1419 memcpy(hdr_data, hdr, hdr_len[0]); 1420 len += hdr_len[0]; 1421 } 1422 1423 if ((hdr_field >> 5) & 1) { 1424 hdr = skb_network_header(skb); 1425 memcpy(hdr_data + len, hdr, hdr_len[1]); 1426 len += hdr_len[1]; 1427 } 1428 1429 if ((hdr_field >> 4) & 1) { 1430 hdr = skb_transport_header(skb); 1431 memcpy(hdr_data + len, hdr, hdr_len[2]); 1432 len += hdr_len[2]; 1433 } 1434 return len; 1435 } 1436 1437 /** 1438 * create_hdr_descs - create header and header extension descriptors 1439 * @hdr_field - bitfield determining needed headers 1440 * @data - buffer containing header data 1441 * @len - length of data buffer 1442 * @hdr_len - array of individual header lengths 1443 * @scrq_arr - descriptor array 1444 * 1445 * Creates header and, if needed, header extension descriptors and 1446 * places them in a descriptor array, scrq_arr 1447 */ 1448 1449 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1450 union sub_crq *scrq_arr) 1451 { 1452 union sub_crq hdr_desc; 1453 int tmp_len = len; 1454 int num_descs = 0; 1455 u8 *data, *cur; 1456 int tmp; 1457 1458 while (tmp_len > 0) { 1459 cur = hdr_data + len - tmp_len; 1460 1461 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1462 if (cur != hdr_data) { 1463 data = hdr_desc.hdr_ext.data; 1464 tmp = tmp_len > 29 ? 29 : tmp_len; 1465 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1466 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1467 hdr_desc.hdr_ext.len = tmp; 1468 } else { 1469 data = hdr_desc.hdr.data; 1470 tmp = tmp_len > 24 ? 24 : tmp_len; 1471 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1472 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1473 hdr_desc.hdr.len = tmp; 1474 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1475 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1476 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1477 hdr_desc.hdr.flag = hdr_field << 1; 1478 } 1479 memcpy(data, cur, tmp); 1480 tmp_len -= tmp; 1481 *scrq_arr = hdr_desc; 1482 scrq_arr++; 1483 num_descs++; 1484 } 1485 1486 return num_descs; 1487 } 1488 1489 /** 1490 * build_hdr_descs_arr - build a header descriptor array 1491 * @skb - socket buffer 1492 * @num_entries - number of descriptors to be sent 1493 * @subcrq - first TX descriptor 1494 * @hdr_field - bit field determining which headers will be sent 1495 * 1496 * This function will build a TX descriptor array with applicable 1497 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1498 */ 1499 1500 static void build_hdr_descs_arr(struct sk_buff *skb, 1501 union sub_crq *indir_arr, 1502 int *num_entries, u8 hdr_field) 1503 { 1504 int hdr_len[3] = {0, 0, 0}; 1505 u8 hdr_data[140] = {0}; 1506 int tot_len; 1507 1508 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1509 hdr_data); 1510 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1511 indir_arr + 1); 1512 } 1513 1514 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1515 struct net_device *netdev) 1516 { 1517 /* For some backing devices, mishandling of small packets 1518 * can result in a loss of connection or TX stall. Device 1519 * architects recommend that no packet should be smaller 1520 * than the minimum MTU value provided to the driver, so 1521 * pad any packets to that length 1522 */ 1523 if (skb->len < netdev->min_mtu) 1524 return skb_put_padto(skb, netdev->min_mtu); 1525 1526 return 0; 1527 } 1528 1529 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1530 struct ibmvnic_sub_crq_queue *tx_scrq) 1531 { 1532 struct ibmvnic_ind_xmit_queue *ind_bufp; 1533 struct ibmvnic_tx_buff *tx_buff; 1534 struct ibmvnic_tx_pool *tx_pool; 1535 union sub_crq tx_scrq_entry; 1536 int queue_num; 1537 int entries; 1538 int index; 1539 int i; 1540 1541 ind_bufp = &tx_scrq->ind_buf; 1542 entries = (u64)ind_bufp->index; 1543 queue_num = tx_scrq->pool_index; 1544 1545 for (i = entries - 1; i >= 0; --i) { 1546 tx_scrq_entry = ind_bufp->indir_arr[i]; 1547 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1548 continue; 1549 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1550 if (index & IBMVNIC_TSO_POOL_MASK) { 1551 tx_pool = &adapter->tso_pool[queue_num]; 1552 index &= ~IBMVNIC_TSO_POOL_MASK; 1553 } else { 1554 tx_pool = &adapter->tx_pool[queue_num]; 1555 } 1556 tx_pool->free_map[tx_pool->consumer_index] = index; 1557 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1558 tx_pool->num_buffers - 1 : 1559 tx_pool->consumer_index - 1; 1560 tx_buff = &tx_pool->tx_buff[index]; 1561 adapter->netdev->stats.tx_packets--; 1562 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1563 adapter->tx_stats_buffers[queue_num].packets--; 1564 adapter->tx_stats_buffers[queue_num].bytes -= 1565 tx_buff->skb->len; 1566 dev_kfree_skb_any(tx_buff->skb); 1567 tx_buff->skb = NULL; 1568 adapter->netdev->stats.tx_dropped++; 1569 } 1570 ind_bufp->index = 0; 1571 if (atomic_sub_return(entries, &tx_scrq->used) <= 1572 (adapter->req_tx_entries_per_subcrq / 2) && 1573 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1574 netif_wake_subqueue(adapter->netdev, queue_num); 1575 netdev_dbg(adapter->netdev, "Started queue %d\n", 1576 queue_num); 1577 } 1578 } 1579 1580 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1581 struct ibmvnic_sub_crq_queue *tx_scrq) 1582 { 1583 struct ibmvnic_ind_xmit_queue *ind_bufp; 1584 u64 dma_addr; 1585 u64 entries; 1586 u64 handle; 1587 int rc; 1588 1589 ind_bufp = &tx_scrq->ind_buf; 1590 dma_addr = (u64)ind_bufp->indir_dma; 1591 entries = (u64)ind_bufp->index; 1592 handle = tx_scrq->handle; 1593 1594 if (!entries) 1595 return 0; 1596 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1597 if (rc) 1598 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1599 else 1600 ind_bufp->index = 0; 1601 return 0; 1602 } 1603 1604 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1605 { 1606 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1607 int queue_num = skb_get_queue_mapping(skb); 1608 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1609 struct device *dev = &adapter->vdev->dev; 1610 struct ibmvnic_ind_xmit_queue *ind_bufp; 1611 struct ibmvnic_tx_buff *tx_buff = NULL; 1612 struct ibmvnic_sub_crq_queue *tx_scrq; 1613 struct ibmvnic_tx_pool *tx_pool; 1614 unsigned int tx_send_failed = 0; 1615 netdev_tx_t ret = NETDEV_TX_OK; 1616 unsigned int tx_map_failed = 0; 1617 union sub_crq indir_arr[16]; 1618 unsigned int tx_dropped = 0; 1619 unsigned int tx_packets = 0; 1620 unsigned int tx_bytes = 0; 1621 dma_addr_t data_dma_addr; 1622 struct netdev_queue *txq; 1623 unsigned long lpar_rc; 1624 union sub_crq tx_crq; 1625 unsigned int offset; 1626 int num_entries = 1; 1627 unsigned char *dst; 1628 int index = 0; 1629 u8 proto = 0; 1630 1631 tx_scrq = adapter->tx_scrq[queue_num]; 1632 txq = netdev_get_tx_queue(netdev, queue_num); 1633 ind_bufp = &tx_scrq->ind_buf; 1634 1635 if (test_bit(0, &adapter->resetting)) { 1636 if (!netif_subqueue_stopped(netdev, skb)) 1637 netif_stop_subqueue(netdev, queue_num); 1638 dev_kfree_skb_any(skb); 1639 1640 tx_send_failed++; 1641 tx_dropped++; 1642 ret = NETDEV_TX_OK; 1643 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1644 goto out; 1645 } 1646 1647 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1648 tx_dropped++; 1649 tx_send_failed++; 1650 ret = NETDEV_TX_OK; 1651 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1652 goto out; 1653 } 1654 if (skb_is_gso(skb)) 1655 tx_pool = &adapter->tso_pool[queue_num]; 1656 else 1657 tx_pool = &adapter->tx_pool[queue_num]; 1658 1659 index = tx_pool->free_map[tx_pool->consumer_index]; 1660 1661 if (index == IBMVNIC_INVALID_MAP) { 1662 dev_kfree_skb_any(skb); 1663 tx_send_failed++; 1664 tx_dropped++; 1665 ret = NETDEV_TX_OK; 1666 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1667 goto out; 1668 } 1669 1670 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1671 1672 offset = index * tx_pool->buf_size; 1673 dst = tx_pool->long_term_buff.buff + offset; 1674 memset(dst, 0, tx_pool->buf_size); 1675 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1676 1677 if (skb_shinfo(skb)->nr_frags) { 1678 int cur, i; 1679 1680 /* Copy the head */ 1681 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1682 cur = skb_headlen(skb); 1683 1684 /* Copy the frags */ 1685 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1686 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1687 1688 memcpy(dst + cur, 1689 page_address(skb_frag_page(frag)) + 1690 skb_frag_off(frag), skb_frag_size(frag)); 1691 cur += skb_frag_size(frag); 1692 } 1693 } else { 1694 skb_copy_from_linear_data(skb, dst, skb->len); 1695 } 1696 1697 tx_pool->consumer_index = 1698 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1699 1700 tx_buff = &tx_pool->tx_buff[index]; 1701 tx_buff->skb = skb; 1702 tx_buff->index = index; 1703 tx_buff->pool_index = queue_num; 1704 1705 memset(&tx_crq, 0, sizeof(tx_crq)); 1706 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1707 tx_crq.v1.type = IBMVNIC_TX_DESC; 1708 tx_crq.v1.n_crq_elem = 1; 1709 tx_crq.v1.n_sge = 1; 1710 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1711 1712 if (skb_is_gso(skb)) 1713 tx_crq.v1.correlator = 1714 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1715 else 1716 tx_crq.v1.correlator = cpu_to_be32(index); 1717 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1718 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1719 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1720 1721 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1722 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1723 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1724 } 1725 1726 if (skb->protocol == htons(ETH_P_IP)) { 1727 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1728 proto = ip_hdr(skb)->protocol; 1729 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1730 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1731 proto = ipv6_hdr(skb)->nexthdr; 1732 } 1733 1734 if (proto == IPPROTO_TCP) 1735 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1736 else if (proto == IPPROTO_UDP) 1737 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1738 1739 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1740 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1741 hdrs += 2; 1742 } 1743 if (skb_is_gso(skb)) { 1744 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1745 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1746 hdrs += 2; 1747 } 1748 1749 if ((*hdrs >> 7) & 1) 1750 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1751 1752 tx_crq.v1.n_crq_elem = num_entries; 1753 tx_buff->num_entries = num_entries; 1754 /* flush buffer if current entry can not fit */ 1755 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1756 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1757 if (lpar_rc != H_SUCCESS) 1758 goto tx_flush_err; 1759 } 1760 1761 indir_arr[0] = tx_crq; 1762 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1763 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1764 ind_bufp->index += num_entries; 1765 if (__netdev_tx_sent_queue(txq, skb->len, 1766 netdev_xmit_more() && 1767 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1768 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1769 if (lpar_rc != H_SUCCESS) 1770 goto tx_err; 1771 } 1772 1773 if (atomic_add_return(num_entries, &tx_scrq->used) 1774 >= adapter->req_tx_entries_per_subcrq) { 1775 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1776 netif_stop_subqueue(netdev, queue_num); 1777 } 1778 1779 tx_packets++; 1780 tx_bytes += skb->len; 1781 txq->trans_start = jiffies; 1782 ret = NETDEV_TX_OK; 1783 goto out; 1784 1785 tx_flush_err: 1786 dev_kfree_skb_any(skb); 1787 tx_buff->skb = NULL; 1788 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1789 tx_pool->num_buffers - 1 : 1790 tx_pool->consumer_index - 1; 1791 tx_dropped++; 1792 tx_err: 1793 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1794 dev_err_ratelimited(dev, "tx: send failed\n"); 1795 1796 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1797 /* Disable TX and report carrier off if queue is closed 1798 * or pending failover. 1799 * Firmware guarantees that a signal will be sent to the 1800 * driver, triggering a reset or some other action. 1801 */ 1802 netif_tx_stop_all_queues(netdev); 1803 netif_carrier_off(netdev); 1804 } 1805 out: 1806 netdev->stats.tx_dropped += tx_dropped; 1807 netdev->stats.tx_bytes += tx_bytes; 1808 netdev->stats.tx_packets += tx_packets; 1809 adapter->tx_send_failed += tx_send_failed; 1810 adapter->tx_map_failed += tx_map_failed; 1811 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1812 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1813 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1814 1815 return ret; 1816 } 1817 1818 static void ibmvnic_set_multi(struct net_device *netdev) 1819 { 1820 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1821 struct netdev_hw_addr *ha; 1822 union ibmvnic_crq crq; 1823 1824 memset(&crq, 0, sizeof(crq)); 1825 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1826 crq.request_capability.cmd = REQUEST_CAPABILITY; 1827 1828 if (netdev->flags & IFF_PROMISC) { 1829 if (!adapter->promisc_supported) 1830 return; 1831 } else { 1832 if (netdev->flags & IFF_ALLMULTI) { 1833 /* Accept all multicast */ 1834 memset(&crq, 0, sizeof(crq)); 1835 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1836 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1837 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1838 ibmvnic_send_crq(adapter, &crq); 1839 } else if (netdev_mc_empty(netdev)) { 1840 /* Reject all multicast */ 1841 memset(&crq, 0, sizeof(crq)); 1842 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1843 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1844 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1845 ibmvnic_send_crq(adapter, &crq); 1846 } else { 1847 /* Accept one or more multicast(s) */ 1848 netdev_for_each_mc_addr(ha, netdev) { 1849 memset(&crq, 0, sizeof(crq)); 1850 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1851 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1852 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1853 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1854 ha->addr); 1855 ibmvnic_send_crq(adapter, &crq); 1856 } 1857 } 1858 } 1859 } 1860 1861 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1862 { 1863 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1864 union ibmvnic_crq crq; 1865 int rc; 1866 1867 if (!is_valid_ether_addr(dev_addr)) { 1868 rc = -EADDRNOTAVAIL; 1869 goto err; 1870 } 1871 1872 memset(&crq, 0, sizeof(crq)); 1873 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1874 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1875 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1876 1877 mutex_lock(&adapter->fw_lock); 1878 adapter->fw_done_rc = 0; 1879 reinit_completion(&adapter->fw_done); 1880 1881 rc = ibmvnic_send_crq(adapter, &crq); 1882 if (rc) { 1883 rc = -EIO; 1884 mutex_unlock(&adapter->fw_lock); 1885 goto err; 1886 } 1887 1888 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1889 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1890 if (rc || adapter->fw_done_rc) { 1891 rc = -EIO; 1892 mutex_unlock(&adapter->fw_lock); 1893 goto err; 1894 } 1895 mutex_unlock(&adapter->fw_lock); 1896 return 0; 1897 err: 1898 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1899 return rc; 1900 } 1901 1902 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1903 { 1904 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1905 struct sockaddr *addr = p; 1906 int rc; 1907 1908 rc = 0; 1909 if (!is_valid_ether_addr(addr->sa_data)) 1910 return -EADDRNOTAVAIL; 1911 1912 if (adapter->state != VNIC_PROBED) { 1913 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1914 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1915 } 1916 1917 return rc; 1918 } 1919 1920 /** 1921 * do_change_param_reset returns zero if we are able to keep processing reset 1922 * events, or non-zero if we hit a fatal error and must halt. 1923 */ 1924 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1925 struct ibmvnic_rwi *rwi, 1926 u32 reset_state) 1927 { 1928 struct net_device *netdev = adapter->netdev; 1929 int i, rc; 1930 1931 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1932 rwi->reset_reason); 1933 1934 netif_carrier_off(netdev); 1935 adapter->reset_reason = rwi->reset_reason; 1936 1937 ibmvnic_cleanup(netdev); 1938 1939 if (reset_state == VNIC_OPEN) { 1940 rc = __ibmvnic_close(netdev); 1941 if (rc) 1942 return rc; 1943 } 1944 1945 release_resources(adapter); 1946 release_sub_crqs(adapter, 1); 1947 release_crq_queue(adapter); 1948 1949 adapter->state = VNIC_PROBED; 1950 1951 rc = init_crq_queue(adapter); 1952 1953 if (rc) { 1954 netdev_err(adapter->netdev, 1955 "Couldn't initialize crq. rc=%d\n", rc); 1956 return rc; 1957 } 1958 1959 rc = ibmvnic_reset_init(adapter, true); 1960 if (rc) 1961 return IBMVNIC_INIT_FAILED; 1962 1963 /* If the adapter was in PROBE state prior to the reset, 1964 * exit here. 1965 */ 1966 if (reset_state == VNIC_PROBED) 1967 return 0; 1968 1969 rc = ibmvnic_login(netdev); 1970 if (rc) { 1971 adapter->state = reset_state; 1972 return rc; 1973 } 1974 1975 rc = init_resources(adapter); 1976 if (rc) 1977 return rc; 1978 1979 ibmvnic_disable_irqs(adapter); 1980 1981 adapter->state = VNIC_CLOSED; 1982 1983 if (reset_state == VNIC_CLOSED) 1984 return 0; 1985 1986 rc = __ibmvnic_open(netdev); 1987 if (rc) 1988 return IBMVNIC_OPEN_FAILED; 1989 1990 /* refresh device's multicast list */ 1991 ibmvnic_set_multi(netdev); 1992 1993 /* kick napi */ 1994 for (i = 0; i < adapter->req_rx_queues; i++) 1995 napi_schedule(&adapter->napi[i]); 1996 1997 return 0; 1998 } 1999 2000 /** 2001 * do_reset returns zero if we are able to keep processing reset events, or 2002 * non-zero if we hit a fatal error and must halt. 2003 */ 2004 static int do_reset(struct ibmvnic_adapter *adapter, 2005 struct ibmvnic_rwi *rwi, u32 reset_state) 2006 { 2007 u64 old_num_rx_queues, old_num_tx_queues; 2008 u64 old_num_rx_slots, old_num_tx_slots; 2009 struct net_device *netdev = adapter->netdev; 2010 int i, rc; 2011 2012 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 2013 rwi->reset_reason); 2014 2015 rtnl_lock(); 2016 /* 2017 * Now that we have the rtnl lock, clear any pending failover. 2018 * This will ensure ibmvnic_open() has either completed or will 2019 * block until failover is complete. 2020 */ 2021 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2022 adapter->failover_pending = false; 2023 2024 netif_carrier_off(netdev); 2025 adapter->reset_reason = rwi->reset_reason; 2026 2027 old_num_rx_queues = adapter->req_rx_queues; 2028 old_num_tx_queues = adapter->req_tx_queues; 2029 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2030 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2031 2032 ibmvnic_cleanup(netdev); 2033 2034 if (reset_state == VNIC_OPEN && 2035 adapter->reset_reason != VNIC_RESET_MOBILITY && 2036 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2037 adapter->state = VNIC_CLOSING; 2038 2039 /* Release the RTNL lock before link state change and 2040 * re-acquire after the link state change to allow 2041 * linkwatch_event to grab the RTNL lock and run during 2042 * a reset. 2043 */ 2044 rtnl_unlock(); 2045 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2046 rtnl_lock(); 2047 if (rc) 2048 goto out; 2049 2050 if (adapter->state != VNIC_CLOSING) { 2051 rc = -1; 2052 goto out; 2053 } 2054 2055 adapter->state = VNIC_CLOSED; 2056 } 2057 2058 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2059 /* remove the closed state so when we call open it appears 2060 * we are coming from the probed state. 2061 */ 2062 adapter->state = VNIC_PROBED; 2063 2064 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2065 rc = ibmvnic_reenable_crq_queue(adapter); 2066 release_sub_crqs(adapter, 1); 2067 } else { 2068 rc = ibmvnic_reset_crq(adapter); 2069 if (rc == H_CLOSED || rc == H_SUCCESS) { 2070 rc = vio_enable_interrupts(adapter->vdev); 2071 if (rc) 2072 netdev_err(adapter->netdev, 2073 "Reset failed to enable interrupts. rc=%d\n", 2074 rc); 2075 } 2076 } 2077 2078 if (rc) { 2079 netdev_err(adapter->netdev, 2080 "Reset couldn't initialize crq. rc=%d\n", rc); 2081 goto out; 2082 } 2083 2084 rc = ibmvnic_reset_init(adapter, true); 2085 if (rc) { 2086 rc = IBMVNIC_INIT_FAILED; 2087 goto out; 2088 } 2089 2090 /* If the adapter was in PROBE state prior to the reset, 2091 * exit here. 2092 */ 2093 if (reset_state == VNIC_PROBED) { 2094 rc = 0; 2095 goto out; 2096 } 2097 2098 rc = ibmvnic_login(netdev); 2099 if (rc) { 2100 adapter->state = reset_state; 2101 goto out; 2102 } 2103 2104 if (adapter->req_rx_queues != old_num_rx_queues || 2105 adapter->req_tx_queues != old_num_tx_queues || 2106 adapter->req_rx_add_entries_per_subcrq != 2107 old_num_rx_slots || 2108 adapter->req_tx_entries_per_subcrq != 2109 old_num_tx_slots || 2110 !adapter->rx_pool || 2111 !adapter->tso_pool || 2112 !adapter->tx_pool) { 2113 release_rx_pools(adapter); 2114 release_tx_pools(adapter); 2115 release_napi(adapter); 2116 release_vpd_data(adapter); 2117 2118 rc = init_resources(adapter); 2119 if (rc) 2120 goto out; 2121 2122 } else { 2123 rc = reset_tx_pools(adapter); 2124 if (rc) { 2125 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2126 rc); 2127 goto out; 2128 } 2129 2130 rc = reset_rx_pools(adapter); 2131 if (rc) { 2132 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2133 rc); 2134 goto out; 2135 } 2136 } 2137 ibmvnic_disable_irqs(adapter); 2138 } 2139 adapter->state = VNIC_CLOSED; 2140 2141 if (reset_state == VNIC_CLOSED) { 2142 rc = 0; 2143 goto out; 2144 } 2145 2146 rc = __ibmvnic_open(netdev); 2147 if (rc) { 2148 rc = IBMVNIC_OPEN_FAILED; 2149 goto out; 2150 } 2151 2152 /* refresh device's multicast list */ 2153 ibmvnic_set_multi(netdev); 2154 2155 /* kick napi */ 2156 for (i = 0; i < adapter->req_rx_queues; i++) 2157 napi_schedule(&adapter->napi[i]); 2158 2159 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2160 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2161 2162 rc = 0; 2163 2164 out: 2165 rtnl_unlock(); 2166 2167 return rc; 2168 } 2169 2170 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2171 struct ibmvnic_rwi *rwi, u32 reset_state) 2172 { 2173 struct net_device *netdev = adapter->netdev; 2174 int rc; 2175 2176 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2177 rwi->reset_reason); 2178 2179 netif_carrier_off(netdev); 2180 adapter->reset_reason = rwi->reset_reason; 2181 2182 ibmvnic_cleanup(netdev); 2183 release_resources(adapter); 2184 release_sub_crqs(adapter, 0); 2185 release_crq_queue(adapter); 2186 2187 /* remove the closed state so when we call open it appears 2188 * we are coming from the probed state. 2189 */ 2190 adapter->state = VNIC_PROBED; 2191 2192 reinit_completion(&adapter->init_done); 2193 rc = init_crq_queue(adapter); 2194 if (rc) { 2195 netdev_err(adapter->netdev, 2196 "Couldn't initialize crq. rc=%d\n", rc); 2197 return rc; 2198 } 2199 2200 rc = ibmvnic_reset_init(adapter, false); 2201 if (rc) 2202 return rc; 2203 2204 /* If the adapter was in PROBE state prior to the reset, 2205 * exit here. 2206 */ 2207 if (reset_state == VNIC_PROBED) 2208 return 0; 2209 2210 rc = ibmvnic_login(netdev); 2211 if (rc) { 2212 adapter->state = VNIC_PROBED; 2213 return 0; 2214 } 2215 2216 rc = init_resources(adapter); 2217 if (rc) 2218 return rc; 2219 2220 ibmvnic_disable_irqs(adapter); 2221 adapter->state = VNIC_CLOSED; 2222 2223 if (reset_state == VNIC_CLOSED) 2224 return 0; 2225 2226 rc = __ibmvnic_open(netdev); 2227 if (rc) 2228 return IBMVNIC_OPEN_FAILED; 2229 2230 return 0; 2231 } 2232 2233 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2234 { 2235 struct ibmvnic_rwi *rwi; 2236 unsigned long flags; 2237 2238 spin_lock_irqsave(&adapter->rwi_lock, flags); 2239 2240 if (!list_empty(&adapter->rwi_list)) { 2241 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2242 list); 2243 list_del(&rwi->list); 2244 } else { 2245 rwi = NULL; 2246 } 2247 2248 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2249 return rwi; 2250 } 2251 2252 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2253 { 2254 struct ibmvnic_rwi *rwi; 2255 2256 rwi = get_next_rwi(adapter); 2257 while (rwi) { 2258 kfree(rwi); 2259 rwi = get_next_rwi(adapter); 2260 } 2261 } 2262 2263 static void __ibmvnic_reset(struct work_struct *work) 2264 { 2265 struct ibmvnic_rwi *rwi; 2266 struct ibmvnic_adapter *adapter; 2267 bool saved_state = false; 2268 unsigned long flags; 2269 u32 reset_state; 2270 int rc = 0; 2271 2272 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2273 2274 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2275 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2276 IBMVNIC_RESET_DELAY); 2277 return; 2278 } 2279 2280 rwi = get_next_rwi(adapter); 2281 while (rwi) { 2282 spin_lock_irqsave(&adapter->state_lock, flags); 2283 2284 if (adapter->state == VNIC_REMOVING || 2285 adapter->state == VNIC_REMOVED) { 2286 spin_unlock_irqrestore(&adapter->state_lock, flags); 2287 kfree(rwi); 2288 rc = EBUSY; 2289 break; 2290 } 2291 2292 if (!saved_state) { 2293 reset_state = adapter->state; 2294 adapter->state = VNIC_RESETTING; 2295 saved_state = true; 2296 } 2297 spin_unlock_irqrestore(&adapter->state_lock, flags); 2298 2299 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2300 /* CHANGE_PARAM requestor holds rtnl_lock */ 2301 rc = do_change_param_reset(adapter, rwi, reset_state); 2302 } else if (adapter->force_reset_recovery) { 2303 /* 2304 * Since we are doing a hard reset now, clear the 2305 * failover_pending flag so we don't ignore any 2306 * future MOBILITY or other resets. 2307 */ 2308 adapter->failover_pending = false; 2309 2310 /* Transport event occurred during previous reset */ 2311 if (adapter->wait_for_reset) { 2312 /* Previous was CHANGE_PARAM; caller locked */ 2313 adapter->force_reset_recovery = false; 2314 rc = do_hard_reset(adapter, rwi, reset_state); 2315 } else { 2316 rtnl_lock(); 2317 adapter->force_reset_recovery = false; 2318 rc = do_hard_reset(adapter, rwi, reset_state); 2319 rtnl_unlock(); 2320 } 2321 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2322 adapter->from_passive_init)) { 2323 rc = do_reset(adapter, rwi, reset_state); 2324 } 2325 kfree(rwi); 2326 if (rc == IBMVNIC_OPEN_FAILED) { 2327 if (list_empty(&adapter->rwi_list)) 2328 adapter->state = VNIC_CLOSED; 2329 else 2330 adapter->state = reset_state; 2331 rc = 0; 2332 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2333 !adapter->force_reset_recovery) 2334 break; 2335 2336 rwi = get_next_rwi(adapter); 2337 2338 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2339 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2340 adapter->force_reset_recovery = true; 2341 } 2342 2343 if (adapter->wait_for_reset) { 2344 adapter->reset_done_rc = rc; 2345 complete(&adapter->reset_done); 2346 } 2347 2348 if (rc) { 2349 netdev_dbg(adapter->netdev, "Reset failed\n"); 2350 free_all_rwi(adapter); 2351 } 2352 2353 clear_bit_unlock(0, &adapter->resetting); 2354 } 2355 2356 static void __ibmvnic_delayed_reset(struct work_struct *work) 2357 { 2358 struct ibmvnic_adapter *adapter; 2359 2360 adapter = container_of(work, struct ibmvnic_adapter, 2361 ibmvnic_delayed_reset.work); 2362 __ibmvnic_reset(&adapter->ibmvnic_reset); 2363 } 2364 2365 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2366 enum ibmvnic_reset_reason reason) 2367 { 2368 struct list_head *entry, *tmp_entry; 2369 struct ibmvnic_rwi *rwi, *tmp; 2370 struct net_device *netdev = adapter->netdev; 2371 unsigned long flags; 2372 int ret; 2373 2374 /* 2375 * If failover is pending don't schedule any other reset. 2376 * Instead let the failover complete. If there is already a 2377 * a failover reset scheduled, we will detect and drop the 2378 * duplicate reset when walking the ->rwi_list below. 2379 */ 2380 if (adapter->state == VNIC_REMOVING || 2381 adapter->state == VNIC_REMOVED || 2382 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2383 ret = EBUSY; 2384 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2385 goto err; 2386 } 2387 2388 if (adapter->state == VNIC_PROBING) { 2389 netdev_warn(netdev, "Adapter reset during probe\n"); 2390 ret = adapter->init_done_rc = EAGAIN; 2391 goto err; 2392 } 2393 2394 spin_lock_irqsave(&adapter->rwi_lock, flags); 2395 2396 list_for_each(entry, &adapter->rwi_list) { 2397 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2398 if (tmp->reset_reason == reason) { 2399 netdev_dbg(netdev, "Skipping matching reset\n"); 2400 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2401 ret = EBUSY; 2402 goto err; 2403 } 2404 } 2405 2406 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2407 if (!rwi) { 2408 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2409 ibmvnic_close(netdev); 2410 ret = ENOMEM; 2411 goto err; 2412 } 2413 /* if we just received a transport event, 2414 * flush reset queue and process this reset 2415 */ 2416 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2417 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2418 list_del(entry); 2419 } 2420 rwi->reset_reason = reason; 2421 list_add_tail(&rwi->list, &adapter->rwi_list); 2422 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2423 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2424 schedule_work(&adapter->ibmvnic_reset); 2425 2426 return 0; 2427 err: 2428 return -ret; 2429 } 2430 2431 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2432 { 2433 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2434 2435 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2436 } 2437 2438 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2439 struct ibmvnic_rx_buff *rx_buff) 2440 { 2441 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2442 2443 rx_buff->skb = NULL; 2444 2445 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2446 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2447 2448 atomic_dec(&pool->available); 2449 } 2450 2451 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2452 { 2453 struct ibmvnic_sub_crq_queue *rx_scrq; 2454 struct ibmvnic_adapter *adapter; 2455 struct net_device *netdev; 2456 int frames_processed; 2457 int scrq_num; 2458 2459 netdev = napi->dev; 2460 adapter = netdev_priv(netdev); 2461 scrq_num = (int)(napi - adapter->napi); 2462 frames_processed = 0; 2463 rx_scrq = adapter->rx_scrq[scrq_num]; 2464 2465 restart_poll: 2466 while (frames_processed < budget) { 2467 struct sk_buff *skb; 2468 struct ibmvnic_rx_buff *rx_buff; 2469 union sub_crq *next; 2470 u32 length; 2471 u16 offset; 2472 u8 flags = 0; 2473 2474 if (unlikely(test_bit(0, &adapter->resetting) && 2475 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2476 enable_scrq_irq(adapter, rx_scrq); 2477 napi_complete_done(napi, frames_processed); 2478 return frames_processed; 2479 } 2480 2481 if (!pending_scrq(adapter, rx_scrq)) 2482 break; 2483 next = ibmvnic_next_scrq(adapter, rx_scrq); 2484 rx_buff = 2485 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2486 rx_comp.correlator); 2487 /* do error checking */ 2488 if (next->rx_comp.rc) { 2489 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2490 be16_to_cpu(next->rx_comp.rc)); 2491 /* free the entry */ 2492 next->rx_comp.first = 0; 2493 dev_kfree_skb_any(rx_buff->skb); 2494 remove_buff_from_pool(adapter, rx_buff); 2495 continue; 2496 } else if (!rx_buff->skb) { 2497 /* free the entry */ 2498 next->rx_comp.first = 0; 2499 remove_buff_from_pool(adapter, rx_buff); 2500 continue; 2501 } 2502 2503 length = be32_to_cpu(next->rx_comp.len); 2504 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2505 flags = next->rx_comp.flags; 2506 skb = rx_buff->skb; 2507 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2508 length); 2509 2510 /* VLAN Header has been stripped by the system firmware and 2511 * needs to be inserted by the driver 2512 */ 2513 if (adapter->rx_vlan_header_insertion && 2514 (flags & IBMVNIC_VLAN_STRIPPED)) 2515 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2516 ntohs(next->rx_comp.vlan_tci)); 2517 2518 /* free the entry */ 2519 next->rx_comp.first = 0; 2520 remove_buff_from_pool(adapter, rx_buff); 2521 2522 skb_put(skb, length); 2523 skb->protocol = eth_type_trans(skb, netdev); 2524 skb_record_rx_queue(skb, scrq_num); 2525 2526 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2527 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2528 skb->ip_summed = CHECKSUM_UNNECESSARY; 2529 } 2530 2531 length = skb->len; 2532 napi_gro_receive(napi, skb); /* send it up */ 2533 netdev->stats.rx_packets++; 2534 netdev->stats.rx_bytes += length; 2535 adapter->rx_stats_buffers[scrq_num].packets++; 2536 adapter->rx_stats_buffers[scrq_num].bytes += length; 2537 frames_processed++; 2538 } 2539 2540 if (adapter->state != VNIC_CLOSING && 2541 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2542 adapter->req_rx_add_entries_per_subcrq / 2) || 2543 frames_processed < budget)) 2544 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2545 if (frames_processed < budget) { 2546 if (napi_complete_done(napi, frames_processed)) { 2547 enable_scrq_irq(adapter, rx_scrq); 2548 if (pending_scrq(adapter, rx_scrq)) { 2549 rmb(); 2550 if (napi_reschedule(napi)) { 2551 disable_scrq_irq(adapter, rx_scrq); 2552 goto restart_poll; 2553 } 2554 } 2555 } 2556 } 2557 return frames_processed; 2558 } 2559 2560 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2561 { 2562 int rc, ret; 2563 2564 adapter->fallback.mtu = adapter->req_mtu; 2565 adapter->fallback.rx_queues = adapter->req_rx_queues; 2566 adapter->fallback.tx_queues = adapter->req_tx_queues; 2567 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2568 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2569 2570 reinit_completion(&adapter->reset_done); 2571 adapter->wait_for_reset = true; 2572 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2573 2574 if (rc) { 2575 ret = rc; 2576 goto out; 2577 } 2578 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2579 if (rc) { 2580 ret = -ENODEV; 2581 goto out; 2582 } 2583 2584 ret = 0; 2585 if (adapter->reset_done_rc) { 2586 ret = -EIO; 2587 adapter->desired.mtu = adapter->fallback.mtu; 2588 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2589 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2590 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2591 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2592 2593 reinit_completion(&adapter->reset_done); 2594 adapter->wait_for_reset = true; 2595 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2596 if (rc) { 2597 ret = rc; 2598 goto out; 2599 } 2600 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2601 60000); 2602 if (rc) { 2603 ret = -ENODEV; 2604 goto out; 2605 } 2606 } 2607 out: 2608 adapter->wait_for_reset = false; 2609 2610 return ret; 2611 } 2612 2613 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2614 { 2615 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2616 2617 adapter->desired.mtu = new_mtu + ETH_HLEN; 2618 2619 return wait_for_reset(adapter); 2620 } 2621 2622 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2623 struct net_device *dev, 2624 netdev_features_t features) 2625 { 2626 /* Some backing hardware adapters can not 2627 * handle packets with a MSS less than 224 2628 * or with only one segment. 2629 */ 2630 if (skb_is_gso(skb)) { 2631 if (skb_shinfo(skb)->gso_size < 224 || 2632 skb_shinfo(skb)->gso_segs == 1) 2633 features &= ~NETIF_F_GSO_MASK; 2634 } 2635 2636 return features; 2637 } 2638 2639 static const struct net_device_ops ibmvnic_netdev_ops = { 2640 .ndo_open = ibmvnic_open, 2641 .ndo_stop = ibmvnic_close, 2642 .ndo_start_xmit = ibmvnic_xmit, 2643 .ndo_set_rx_mode = ibmvnic_set_multi, 2644 .ndo_set_mac_address = ibmvnic_set_mac, 2645 .ndo_validate_addr = eth_validate_addr, 2646 .ndo_tx_timeout = ibmvnic_tx_timeout, 2647 .ndo_change_mtu = ibmvnic_change_mtu, 2648 .ndo_features_check = ibmvnic_features_check, 2649 }; 2650 2651 /* ethtool functions */ 2652 2653 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2654 struct ethtool_link_ksettings *cmd) 2655 { 2656 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2657 int rc; 2658 2659 rc = send_query_phys_parms(adapter); 2660 if (rc) { 2661 adapter->speed = SPEED_UNKNOWN; 2662 adapter->duplex = DUPLEX_UNKNOWN; 2663 } 2664 cmd->base.speed = adapter->speed; 2665 cmd->base.duplex = adapter->duplex; 2666 cmd->base.port = PORT_FIBRE; 2667 cmd->base.phy_address = 0; 2668 cmd->base.autoneg = AUTONEG_ENABLE; 2669 2670 return 0; 2671 } 2672 2673 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2674 struct ethtool_drvinfo *info) 2675 { 2676 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2677 2678 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2679 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2680 strlcpy(info->fw_version, adapter->fw_version, 2681 sizeof(info->fw_version)); 2682 } 2683 2684 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2685 { 2686 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2687 2688 return adapter->msg_enable; 2689 } 2690 2691 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2692 { 2693 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2694 2695 adapter->msg_enable = data; 2696 } 2697 2698 static u32 ibmvnic_get_link(struct net_device *netdev) 2699 { 2700 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2701 2702 /* Don't need to send a query because we request a logical link up at 2703 * init and then we wait for link state indications 2704 */ 2705 return adapter->logical_link_state; 2706 } 2707 2708 static void ibmvnic_get_ringparam(struct net_device *netdev, 2709 struct ethtool_ringparam *ring) 2710 { 2711 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2712 2713 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2714 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2715 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2716 } else { 2717 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2718 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2719 } 2720 ring->rx_mini_max_pending = 0; 2721 ring->rx_jumbo_max_pending = 0; 2722 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2723 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2724 ring->rx_mini_pending = 0; 2725 ring->rx_jumbo_pending = 0; 2726 } 2727 2728 static int ibmvnic_set_ringparam(struct net_device *netdev, 2729 struct ethtool_ringparam *ring) 2730 { 2731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2732 int ret; 2733 2734 ret = 0; 2735 adapter->desired.rx_entries = ring->rx_pending; 2736 adapter->desired.tx_entries = ring->tx_pending; 2737 2738 ret = wait_for_reset(adapter); 2739 2740 if (!ret && 2741 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2742 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2743 netdev_info(netdev, 2744 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2745 ring->rx_pending, ring->tx_pending, 2746 adapter->req_rx_add_entries_per_subcrq, 2747 adapter->req_tx_entries_per_subcrq); 2748 return ret; 2749 } 2750 2751 static void ibmvnic_get_channels(struct net_device *netdev, 2752 struct ethtool_channels *channels) 2753 { 2754 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2755 2756 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2757 channels->max_rx = adapter->max_rx_queues; 2758 channels->max_tx = adapter->max_tx_queues; 2759 } else { 2760 channels->max_rx = IBMVNIC_MAX_QUEUES; 2761 channels->max_tx = IBMVNIC_MAX_QUEUES; 2762 } 2763 2764 channels->max_other = 0; 2765 channels->max_combined = 0; 2766 channels->rx_count = adapter->req_rx_queues; 2767 channels->tx_count = adapter->req_tx_queues; 2768 channels->other_count = 0; 2769 channels->combined_count = 0; 2770 } 2771 2772 static int ibmvnic_set_channels(struct net_device *netdev, 2773 struct ethtool_channels *channels) 2774 { 2775 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2776 int ret; 2777 2778 ret = 0; 2779 adapter->desired.rx_queues = channels->rx_count; 2780 adapter->desired.tx_queues = channels->tx_count; 2781 2782 ret = wait_for_reset(adapter); 2783 2784 if (!ret && 2785 (adapter->req_rx_queues != channels->rx_count || 2786 adapter->req_tx_queues != channels->tx_count)) 2787 netdev_info(netdev, 2788 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2789 channels->rx_count, channels->tx_count, 2790 adapter->req_rx_queues, adapter->req_tx_queues); 2791 return ret; 2792 2793 } 2794 2795 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2796 { 2797 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2798 int i; 2799 2800 switch (stringset) { 2801 case ETH_SS_STATS: 2802 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2803 i++, data += ETH_GSTRING_LEN) 2804 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2805 2806 for (i = 0; i < adapter->req_tx_queues; i++) { 2807 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2808 data += ETH_GSTRING_LEN; 2809 2810 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2811 data += ETH_GSTRING_LEN; 2812 2813 snprintf(data, ETH_GSTRING_LEN, 2814 "tx%d_dropped_packets", i); 2815 data += ETH_GSTRING_LEN; 2816 } 2817 2818 for (i = 0; i < adapter->req_rx_queues; i++) { 2819 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2820 data += ETH_GSTRING_LEN; 2821 2822 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2823 data += ETH_GSTRING_LEN; 2824 2825 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2826 data += ETH_GSTRING_LEN; 2827 } 2828 break; 2829 2830 case ETH_SS_PRIV_FLAGS: 2831 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2832 strcpy(data + i * ETH_GSTRING_LEN, 2833 ibmvnic_priv_flags[i]); 2834 break; 2835 default: 2836 return; 2837 } 2838 } 2839 2840 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2841 { 2842 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2843 2844 switch (sset) { 2845 case ETH_SS_STATS: 2846 return ARRAY_SIZE(ibmvnic_stats) + 2847 adapter->req_tx_queues * NUM_TX_STATS + 2848 adapter->req_rx_queues * NUM_RX_STATS; 2849 case ETH_SS_PRIV_FLAGS: 2850 return ARRAY_SIZE(ibmvnic_priv_flags); 2851 default: 2852 return -EOPNOTSUPP; 2853 } 2854 } 2855 2856 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2857 struct ethtool_stats *stats, u64 *data) 2858 { 2859 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2860 union ibmvnic_crq crq; 2861 int i, j; 2862 int rc; 2863 2864 memset(&crq, 0, sizeof(crq)); 2865 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2866 crq.request_statistics.cmd = REQUEST_STATISTICS; 2867 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2868 crq.request_statistics.len = 2869 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2870 2871 /* Wait for data to be written */ 2872 reinit_completion(&adapter->stats_done); 2873 rc = ibmvnic_send_crq(adapter, &crq); 2874 if (rc) 2875 return; 2876 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2877 if (rc) 2878 return; 2879 2880 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2881 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2882 ibmvnic_stats[i].offset)); 2883 2884 for (j = 0; j < adapter->req_tx_queues; j++) { 2885 data[i] = adapter->tx_stats_buffers[j].packets; 2886 i++; 2887 data[i] = adapter->tx_stats_buffers[j].bytes; 2888 i++; 2889 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2890 i++; 2891 } 2892 2893 for (j = 0; j < adapter->req_rx_queues; j++) { 2894 data[i] = adapter->rx_stats_buffers[j].packets; 2895 i++; 2896 data[i] = adapter->rx_stats_buffers[j].bytes; 2897 i++; 2898 data[i] = adapter->rx_stats_buffers[j].interrupts; 2899 i++; 2900 } 2901 } 2902 2903 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2904 { 2905 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2906 2907 return adapter->priv_flags; 2908 } 2909 2910 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2911 { 2912 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2913 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2914 2915 if (which_maxes) 2916 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2917 else 2918 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2919 2920 return 0; 2921 } 2922 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2923 .get_drvinfo = ibmvnic_get_drvinfo, 2924 .get_msglevel = ibmvnic_get_msglevel, 2925 .set_msglevel = ibmvnic_set_msglevel, 2926 .get_link = ibmvnic_get_link, 2927 .get_ringparam = ibmvnic_get_ringparam, 2928 .set_ringparam = ibmvnic_set_ringparam, 2929 .get_channels = ibmvnic_get_channels, 2930 .set_channels = ibmvnic_set_channels, 2931 .get_strings = ibmvnic_get_strings, 2932 .get_sset_count = ibmvnic_get_sset_count, 2933 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2934 .get_link_ksettings = ibmvnic_get_link_ksettings, 2935 .get_priv_flags = ibmvnic_get_priv_flags, 2936 .set_priv_flags = ibmvnic_set_priv_flags, 2937 }; 2938 2939 /* Routines for managing CRQs/sCRQs */ 2940 2941 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2942 struct ibmvnic_sub_crq_queue *scrq) 2943 { 2944 int rc; 2945 2946 if (scrq->irq) { 2947 free_irq(scrq->irq, scrq); 2948 irq_dispose_mapping(scrq->irq); 2949 scrq->irq = 0; 2950 } 2951 2952 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2953 atomic_set(&scrq->used, 0); 2954 scrq->cur = 0; 2955 scrq->ind_buf.index = 0; 2956 2957 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2958 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2959 return rc; 2960 } 2961 2962 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2963 { 2964 int i, rc; 2965 2966 for (i = 0; i < adapter->req_tx_queues; i++) { 2967 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2968 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2969 if (rc) 2970 return rc; 2971 } 2972 2973 for (i = 0; i < adapter->req_rx_queues; i++) { 2974 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2975 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2976 if (rc) 2977 return rc; 2978 } 2979 2980 return rc; 2981 } 2982 2983 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2984 struct ibmvnic_sub_crq_queue *scrq, 2985 bool do_h_free) 2986 { 2987 struct device *dev = &adapter->vdev->dev; 2988 long rc; 2989 2990 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2991 2992 if (do_h_free) { 2993 /* Close the sub-crqs */ 2994 do { 2995 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2996 adapter->vdev->unit_address, 2997 scrq->crq_num); 2998 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2999 3000 if (rc) { 3001 netdev_err(adapter->netdev, 3002 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3003 scrq->crq_num, rc); 3004 } 3005 } 3006 3007 dma_free_coherent(dev, 3008 IBMVNIC_IND_ARR_SZ, 3009 scrq->ind_buf.indir_arr, 3010 scrq->ind_buf.indir_dma); 3011 3012 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3013 DMA_BIDIRECTIONAL); 3014 free_pages((unsigned long)scrq->msgs, 2); 3015 kfree(scrq); 3016 } 3017 3018 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3019 *adapter) 3020 { 3021 struct device *dev = &adapter->vdev->dev; 3022 struct ibmvnic_sub_crq_queue *scrq; 3023 int rc; 3024 3025 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3026 if (!scrq) 3027 return NULL; 3028 3029 scrq->msgs = 3030 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3031 if (!scrq->msgs) { 3032 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3033 goto zero_page_failed; 3034 } 3035 3036 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3037 DMA_BIDIRECTIONAL); 3038 if (dma_mapping_error(dev, scrq->msg_token)) { 3039 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3040 goto map_failed; 3041 } 3042 3043 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3044 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3045 3046 if (rc == H_RESOURCE) 3047 rc = ibmvnic_reset_crq(adapter); 3048 3049 if (rc == H_CLOSED) { 3050 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3051 } else if (rc) { 3052 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3053 goto reg_failed; 3054 } 3055 3056 scrq->adapter = adapter; 3057 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3058 scrq->ind_buf.index = 0; 3059 3060 scrq->ind_buf.indir_arr = 3061 dma_alloc_coherent(dev, 3062 IBMVNIC_IND_ARR_SZ, 3063 &scrq->ind_buf.indir_dma, 3064 GFP_KERNEL); 3065 3066 if (!scrq->ind_buf.indir_arr) 3067 goto indir_failed; 3068 3069 spin_lock_init(&scrq->lock); 3070 3071 netdev_dbg(adapter->netdev, 3072 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3073 scrq->crq_num, scrq->hw_irq, scrq->irq); 3074 3075 return scrq; 3076 3077 indir_failed: 3078 do { 3079 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3080 adapter->vdev->unit_address, 3081 scrq->crq_num); 3082 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3083 reg_failed: 3084 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3085 DMA_BIDIRECTIONAL); 3086 map_failed: 3087 free_pages((unsigned long)scrq->msgs, 2); 3088 zero_page_failed: 3089 kfree(scrq); 3090 3091 return NULL; 3092 } 3093 3094 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3095 { 3096 int i; 3097 3098 if (adapter->tx_scrq) { 3099 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3100 if (!adapter->tx_scrq[i]) 3101 continue; 3102 3103 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3104 i); 3105 if (adapter->tx_scrq[i]->irq) { 3106 free_irq(adapter->tx_scrq[i]->irq, 3107 adapter->tx_scrq[i]); 3108 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3109 adapter->tx_scrq[i]->irq = 0; 3110 } 3111 3112 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3113 do_h_free); 3114 } 3115 3116 kfree(adapter->tx_scrq); 3117 adapter->tx_scrq = NULL; 3118 adapter->num_active_tx_scrqs = 0; 3119 } 3120 3121 if (adapter->rx_scrq) { 3122 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3123 if (!adapter->rx_scrq[i]) 3124 continue; 3125 3126 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3127 i); 3128 if (adapter->rx_scrq[i]->irq) { 3129 free_irq(adapter->rx_scrq[i]->irq, 3130 adapter->rx_scrq[i]); 3131 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3132 adapter->rx_scrq[i]->irq = 0; 3133 } 3134 3135 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3136 do_h_free); 3137 } 3138 3139 kfree(adapter->rx_scrq); 3140 adapter->rx_scrq = NULL; 3141 adapter->num_active_rx_scrqs = 0; 3142 } 3143 } 3144 3145 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3146 struct ibmvnic_sub_crq_queue *scrq) 3147 { 3148 struct device *dev = &adapter->vdev->dev; 3149 unsigned long rc; 3150 3151 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3152 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3153 if (rc) 3154 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3155 scrq->hw_irq, rc); 3156 return rc; 3157 } 3158 3159 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3160 struct ibmvnic_sub_crq_queue *scrq) 3161 { 3162 struct device *dev = &adapter->vdev->dev; 3163 unsigned long rc; 3164 3165 if (scrq->hw_irq > 0x100000000ULL) { 3166 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3167 return 1; 3168 } 3169 3170 if (test_bit(0, &adapter->resetting) && 3171 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3172 u64 val = (0xff000000) | scrq->hw_irq; 3173 3174 rc = plpar_hcall_norets(H_EOI, val); 3175 /* H_EOI would fail with rc = H_FUNCTION when running 3176 * in XIVE mode which is expected, but not an error. 3177 */ 3178 if (rc && (rc != H_FUNCTION)) 3179 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3180 val, rc); 3181 } 3182 3183 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3184 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3185 if (rc) 3186 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3187 scrq->hw_irq, rc); 3188 return rc; 3189 } 3190 3191 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3192 struct ibmvnic_sub_crq_queue *scrq) 3193 { 3194 struct device *dev = &adapter->vdev->dev; 3195 struct ibmvnic_tx_pool *tx_pool; 3196 struct ibmvnic_tx_buff *txbuff; 3197 struct netdev_queue *txq; 3198 union sub_crq *next; 3199 int index; 3200 int i; 3201 3202 restart_loop: 3203 while (pending_scrq(adapter, scrq)) { 3204 unsigned int pool = scrq->pool_index; 3205 int num_entries = 0; 3206 int total_bytes = 0; 3207 int num_packets = 0; 3208 3209 next = ibmvnic_next_scrq(adapter, scrq); 3210 for (i = 0; i < next->tx_comp.num_comps; i++) { 3211 if (next->tx_comp.rcs[i]) { 3212 dev_err(dev, "tx error %x\n", 3213 next->tx_comp.rcs[i]); 3214 continue; 3215 } 3216 index = be32_to_cpu(next->tx_comp.correlators[i]); 3217 if (index & IBMVNIC_TSO_POOL_MASK) { 3218 tx_pool = &adapter->tso_pool[pool]; 3219 index &= ~IBMVNIC_TSO_POOL_MASK; 3220 } else { 3221 tx_pool = &adapter->tx_pool[pool]; 3222 } 3223 3224 txbuff = &tx_pool->tx_buff[index]; 3225 num_packets++; 3226 num_entries += txbuff->num_entries; 3227 if (txbuff->skb) { 3228 total_bytes += txbuff->skb->len; 3229 dev_consume_skb_irq(txbuff->skb); 3230 txbuff->skb = NULL; 3231 } else { 3232 netdev_warn(adapter->netdev, 3233 "TX completion received with NULL socket buffer\n"); 3234 } 3235 tx_pool->free_map[tx_pool->producer_index] = index; 3236 tx_pool->producer_index = 3237 (tx_pool->producer_index + 1) % 3238 tx_pool->num_buffers; 3239 } 3240 /* remove tx_comp scrq*/ 3241 next->tx_comp.first = 0; 3242 3243 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3244 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3245 3246 if (atomic_sub_return(num_entries, &scrq->used) <= 3247 (adapter->req_tx_entries_per_subcrq / 2) && 3248 __netif_subqueue_stopped(adapter->netdev, 3249 scrq->pool_index)) { 3250 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3251 netdev_dbg(adapter->netdev, "Started queue %d\n", 3252 scrq->pool_index); 3253 } 3254 } 3255 3256 enable_scrq_irq(adapter, scrq); 3257 3258 if (pending_scrq(adapter, scrq)) { 3259 disable_scrq_irq(adapter, scrq); 3260 goto restart_loop; 3261 } 3262 3263 return 0; 3264 } 3265 3266 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3267 { 3268 struct ibmvnic_sub_crq_queue *scrq = instance; 3269 struct ibmvnic_adapter *adapter = scrq->adapter; 3270 3271 disable_scrq_irq(adapter, scrq); 3272 ibmvnic_complete_tx(adapter, scrq); 3273 3274 return IRQ_HANDLED; 3275 } 3276 3277 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3278 { 3279 struct ibmvnic_sub_crq_queue *scrq = instance; 3280 struct ibmvnic_adapter *adapter = scrq->adapter; 3281 3282 /* When booting a kdump kernel we can hit pending interrupts 3283 * prior to completing driver initialization. 3284 */ 3285 if (unlikely(adapter->state != VNIC_OPEN)) 3286 return IRQ_NONE; 3287 3288 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3289 3290 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3291 disable_scrq_irq(adapter, scrq); 3292 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3293 } 3294 3295 return IRQ_HANDLED; 3296 } 3297 3298 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3299 { 3300 struct device *dev = &adapter->vdev->dev; 3301 struct ibmvnic_sub_crq_queue *scrq; 3302 int i = 0, j = 0; 3303 int rc = 0; 3304 3305 for (i = 0; i < adapter->req_tx_queues; i++) { 3306 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3307 i); 3308 scrq = adapter->tx_scrq[i]; 3309 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3310 3311 if (!scrq->irq) { 3312 rc = -EINVAL; 3313 dev_err(dev, "Error mapping irq\n"); 3314 goto req_tx_irq_failed; 3315 } 3316 3317 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3318 adapter->vdev->unit_address, i); 3319 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3320 0, scrq->name, scrq); 3321 3322 if (rc) { 3323 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3324 scrq->irq, rc); 3325 irq_dispose_mapping(scrq->irq); 3326 goto req_tx_irq_failed; 3327 } 3328 } 3329 3330 for (i = 0; i < adapter->req_rx_queues; i++) { 3331 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3332 i); 3333 scrq = adapter->rx_scrq[i]; 3334 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3335 if (!scrq->irq) { 3336 rc = -EINVAL; 3337 dev_err(dev, "Error mapping irq\n"); 3338 goto req_rx_irq_failed; 3339 } 3340 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3341 adapter->vdev->unit_address, i); 3342 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3343 0, scrq->name, scrq); 3344 if (rc) { 3345 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3346 scrq->irq, rc); 3347 irq_dispose_mapping(scrq->irq); 3348 goto req_rx_irq_failed; 3349 } 3350 } 3351 return rc; 3352 3353 req_rx_irq_failed: 3354 for (j = 0; j < i; j++) { 3355 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3356 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3357 } 3358 i = adapter->req_tx_queues; 3359 req_tx_irq_failed: 3360 for (j = 0; j < i; j++) { 3361 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3362 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3363 } 3364 release_sub_crqs(adapter, 1); 3365 return rc; 3366 } 3367 3368 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3369 { 3370 struct device *dev = &adapter->vdev->dev; 3371 struct ibmvnic_sub_crq_queue **allqueues; 3372 int registered_queues = 0; 3373 int total_queues; 3374 int more = 0; 3375 int i; 3376 3377 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3378 3379 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3380 if (!allqueues) 3381 return -1; 3382 3383 for (i = 0; i < total_queues; i++) { 3384 allqueues[i] = init_sub_crq_queue(adapter); 3385 if (!allqueues[i]) { 3386 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3387 break; 3388 } 3389 registered_queues++; 3390 } 3391 3392 /* Make sure we were able to register the minimum number of queues */ 3393 if (registered_queues < 3394 adapter->min_tx_queues + adapter->min_rx_queues) { 3395 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3396 goto tx_failed; 3397 } 3398 3399 /* Distribute the failed allocated queues*/ 3400 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3401 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3402 switch (i % 3) { 3403 case 0: 3404 if (adapter->req_rx_queues > adapter->min_rx_queues) 3405 adapter->req_rx_queues--; 3406 else 3407 more++; 3408 break; 3409 case 1: 3410 if (adapter->req_tx_queues > adapter->min_tx_queues) 3411 adapter->req_tx_queues--; 3412 else 3413 more++; 3414 break; 3415 } 3416 } 3417 3418 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3419 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3420 if (!adapter->tx_scrq) 3421 goto tx_failed; 3422 3423 for (i = 0; i < adapter->req_tx_queues; i++) { 3424 adapter->tx_scrq[i] = allqueues[i]; 3425 adapter->tx_scrq[i]->pool_index = i; 3426 adapter->num_active_tx_scrqs++; 3427 } 3428 3429 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3430 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3431 if (!adapter->rx_scrq) 3432 goto rx_failed; 3433 3434 for (i = 0; i < adapter->req_rx_queues; i++) { 3435 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3436 adapter->rx_scrq[i]->scrq_num = i; 3437 adapter->num_active_rx_scrqs++; 3438 } 3439 3440 kfree(allqueues); 3441 return 0; 3442 3443 rx_failed: 3444 kfree(adapter->tx_scrq); 3445 adapter->tx_scrq = NULL; 3446 tx_failed: 3447 for (i = 0; i < registered_queues; i++) 3448 release_sub_crq_queue(adapter, allqueues[i], 1); 3449 kfree(allqueues); 3450 return -1; 3451 } 3452 3453 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3454 { 3455 struct device *dev = &adapter->vdev->dev; 3456 union ibmvnic_crq crq; 3457 int max_entries; 3458 3459 if (!retry) { 3460 /* Sub-CRQ entries are 32 byte long */ 3461 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3462 3463 if (adapter->min_tx_entries_per_subcrq > entries_page || 3464 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3465 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3466 return; 3467 } 3468 3469 if (adapter->desired.mtu) 3470 adapter->req_mtu = adapter->desired.mtu; 3471 else 3472 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3473 3474 if (!adapter->desired.tx_entries) 3475 adapter->desired.tx_entries = 3476 adapter->max_tx_entries_per_subcrq; 3477 if (!adapter->desired.rx_entries) 3478 adapter->desired.rx_entries = 3479 adapter->max_rx_add_entries_per_subcrq; 3480 3481 max_entries = IBMVNIC_MAX_LTB_SIZE / 3482 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3483 3484 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3485 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3486 adapter->desired.tx_entries = max_entries; 3487 } 3488 3489 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3490 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3491 adapter->desired.rx_entries = max_entries; 3492 } 3493 3494 if (adapter->desired.tx_entries) 3495 adapter->req_tx_entries_per_subcrq = 3496 adapter->desired.tx_entries; 3497 else 3498 adapter->req_tx_entries_per_subcrq = 3499 adapter->max_tx_entries_per_subcrq; 3500 3501 if (adapter->desired.rx_entries) 3502 adapter->req_rx_add_entries_per_subcrq = 3503 adapter->desired.rx_entries; 3504 else 3505 adapter->req_rx_add_entries_per_subcrq = 3506 adapter->max_rx_add_entries_per_subcrq; 3507 3508 if (adapter->desired.tx_queues) 3509 adapter->req_tx_queues = 3510 adapter->desired.tx_queues; 3511 else 3512 adapter->req_tx_queues = 3513 adapter->opt_tx_comp_sub_queues; 3514 3515 if (adapter->desired.rx_queues) 3516 adapter->req_rx_queues = 3517 adapter->desired.rx_queues; 3518 else 3519 adapter->req_rx_queues = 3520 adapter->opt_rx_comp_queues; 3521 3522 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3523 } 3524 3525 memset(&crq, 0, sizeof(crq)); 3526 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3527 crq.request_capability.cmd = REQUEST_CAPABILITY; 3528 3529 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3530 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3531 atomic_inc(&adapter->running_cap_crqs); 3532 ibmvnic_send_crq(adapter, &crq); 3533 3534 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3535 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3536 atomic_inc(&adapter->running_cap_crqs); 3537 ibmvnic_send_crq(adapter, &crq); 3538 3539 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3540 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3541 atomic_inc(&adapter->running_cap_crqs); 3542 ibmvnic_send_crq(adapter, &crq); 3543 3544 crq.request_capability.capability = 3545 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3546 crq.request_capability.number = 3547 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3548 atomic_inc(&adapter->running_cap_crqs); 3549 ibmvnic_send_crq(adapter, &crq); 3550 3551 crq.request_capability.capability = 3552 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3553 crq.request_capability.number = 3554 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3555 atomic_inc(&adapter->running_cap_crqs); 3556 ibmvnic_send_crq(adapter, &crq); 3557 3558 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3559 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3560 atomic_inc(&adapter->running_cap_crqs); 3561 ibmvnic_send_crq(adapter, &crq); 3562 3563 if (adapter->netdev->flags & IFF_PROMISC) { 3564 if (adapter->promisc_supported) { 3565 crq.request_capability.capability = 3566 cpu_to_be16(PROMISC_REQUESTED); 3567 crq.request_capability.number = cpu_to_be64(1); 3568 atomic_inc(&adapter->running_cap_crqs); 3569 ibmvnic_send_crq(adapter, &crq); 3570 } 3571 } else { 3572 crq.request_capability.capability = 3573 cpu_to_be16(PROMISC_REQUESTED); 3574 crq.request_capability.number = cpu_to_be64(0); 3575 atomic_inc(&adapter->running_cap_crqs); 3576 ibmvnic_send_crq(adapter, &crq); 3577 } 3578 } 3579 3580 static int pending_scrq(struct ibmvnic_adapter *adapter, 3581 struct ibmvnic_sub_crq_queue *scrq) 3582 { 3583 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3584 3585 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3586 return 1; 3587 else 3588 return 0; 3589 } 3590 3591 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3592 struct ibmvnic_sub_crq_queue *scrq) 3593 { 3594 union sub_crq *entry; 3595 unsigned long flags; 3596 3597 spin_lock_irqsave(&scrq->lock, flags); 3598 entry = &scrq->msgs[scrq->cur]; 3599 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3600 if (++scrq->cur == scrq->size) 3601 scrq->cur = 0; 3602 } else { 3603 entry = NULL; 3604 } 3605 spin_unlock_irqrestore(&scrq->lock, flags); 3606 3607 return entry; 3608 } 3609 3610 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3611 { 3612 struct ibmvnic_crq_queue *queue = &adapter->crq; 3613 union ibmvnic_crq *crq; 3614 3615 crq = &queue->msgs[queue->cur]; 3616 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3617 if (++queue->cur == queue->size) 3618 queue->cur = 0; 3619 } else { 3620 crq = NULL; 3621 } 3622 3623 return crq; 3624 } 3625 3626 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3627 { 3628 switch (rc) { 3629 case H_PARAMETER: 3630 dev_warn_ratelimited(dev, 3631 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3632 func, rc); 3633 break; 3634 case H_CLOSED: 3635 dev_warn_ratelimited(dev, 3636 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3637 func, rc); 3638 break; 3639 default: 3640 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3641 break; 3642 } 3643 } 3644 3645 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3646 u64 remote_handle, u64 ioba, u64 num_entries) 3647 { 3648 unsigned int ua = adapter->vdev->unit_address; 3649 struct device *dev = &adapter->vdev->dev; 3650 int rc; 3651 3652 /* Make sure the hypervisor sees the complete request */ 3653 mb(); 3654 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3655 cpu_to_be64(remote_handle), 3656 ioba, num_entries); 3657 3658 if (rc) 3659 print_subcrq_error(dev, rc, __func__); 3660 3661 return rc; 3662 } 3663 3664 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3665 union ibmvnic_crq *crq) 3666 { 3667 unsigned int ua = adapter->vdev->unit_address; 3668 struct device *dev = &adapter->vdev->dev; 3669 u64 *u64_crq = (u64 *)crq; 3670 int rc; 3671 3672 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3673 (unsigned long int)cpu_to_be64(u64_crq[0]), 3674 (unsigned long int)cpu_to_be64(u64_crq[1])); 3675 3676 if (!adapter->crq.active && 3677 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3678 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3679 return -EINVAL; 3680 } 3681 3682 /* Make sure the hypervisor sees the complete request */ 3683 mb(); 3684 3685 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3686 cpu_to_be64(u64_crq[0]), 3687 cpu_to_be64(u64_crq[1])); 3688 3689 if (rc) { 3690 if (rc == H_CLOSED) { 3691 dev_warn(dev, "CRQ Queue closed\n"); 3692 /* do not reset, report the fail, wait for passive init from server */ 3693 } 3694 3695 dev_warn(dev, "Send error (rc=%d)\n", rc); 3696 } 3697 3698 return rc; 3699 } 3700 3701 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3702 { 3703 struct device *dev = &adapter->vdev->dev; 3704 union ibmvnic_crq crq; 3705 int retries = 100; 3706 int rc; 3707 3708 memset(&crq, 0, sizeof(crq)); 3709 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3710 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3711 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3712 3713 do { 3714 rc = ibmvnic_send_crq(adapter, &crq); 3715 if (rc != H_CLOSED) 3716 break; 3717 retries--; 3718 msleep(50); 3719 3720 } while (retries > 0); 3721 3722 if (rc) { 3723 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3724 return rc; 3725 } 3726 3727 return 0; 3728 } 3729 3730 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3731 { 3732 union ibmvnic_crq crq; 3733 3734 memset(&crq, 0, sizeof(crq)); 3735 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3736 crq.version_exchange.cmd = VERSION_EXCHANGE; 3737 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3738 3739 return ibmvnic_send_crq(adapter, &crq); 3740 } 3741 3742 struct vnic_login_client_data { 3743 u8 type; 3744 __be16 len; 3745 char name[]; 3746 } __packed; 3747 3748 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3749 { 3750 int len; 3751 3752 /* Calculate the amount of buffer space needed for the 3753 * vnic client data in the login buffer. There are four entries, 3754 * OS name, LPAR name, device name, and a null last entry. 3755 */ 3756 len = 4 * sizeof(struct vnic_login_client_data); 3757 len += 6; /* "Linux" plus NULL */ 3758 len += strlen(utsname()->nodename) + 1; 3759 len += strlen(adapter->netdev->name) + 1; 3760 3761 return len; 3762 } 3763 3764 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3765 struct vnic_login_client_data *vlcd) 3766 { 3767 const char *os_name = "Linux"; 3768 int len; 3769 3770 /* Type 1 - LPAR OS */ 3771 vlcd->type = 1; 3772 len = strlen(os_name) + 1; 3773 vlcd->len = cpu_to_be16(len); 3774 strncpy(vlcd->name, os_name, len); 3775 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3776 3777 /* Type 2 - LPAR name */ 3778 vlcd->type = 2; 3779 len = strlen(utsname()->nodename) + 1; 3780 vlcd->len = cpu_to_be16(len); 3781 strncpy(vlcd->name, utsname()->nodename, len); 3782 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3783 3784 /* Type 3 - device name */ 3785 vlcd->type = 3; 3786 len = strlen(adapter->netdev->name) + 1; 3787 vlcd->len = cpu_to_be16(len); 3788 strncpy(vlcd->name, adapter->netdev->name, len); 3789 } 3790 3791 static int send_login(struct ibmvnic_adapter *adapter) 3792 { 3793 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3794 struct ibmvnic_login_buffer *login_buffer; 3795 struct device *dev = &adapter->vdev->dev; 3796 dma_addr_t rsp_buffer_token; 3797 dma_addr_t buffer_token; 3798 size_t rsp_buffer_size; 3799 union ibmvnic_crq crq; 3800 size_t buffer_size; 3801 __be64 *tx_list_p; 3802 __be64 *rx_list_p; 3803 int client_data_len; 3804 struct vnic_login_client_data *vlcd; 3805 int i; 3806 3807 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3808 netdev_err(adapter->netdev, 3809 "RX or TX queues are not allocated, device login failed\n"); 3810 return -1; 3811 } 3812 3813 release_login_rsp_buffer(adapter); 3814 client_data_len = vnic_client_data_len(adapter); 3815 3816 buffer_size = 3817 sizeof(struct ibmvnic_login_buffer) + 3818 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3819 client_data_len; 3820 3821 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3822 if (!login_buffer) 3823 goto buf_alloc_failed; 3824 3825 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3826 DMA_TO_DEVICE); 3827 if (dma_mapping_error(dev, buffer_token)) { 3828 dev_err(dev, "Couldn't map login buffer\n"); 3829 goto buf_map_failed; 3830 } 3831 3832 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3833 sizeof(u64) * adapter->req_tx_queues + 3834 sizeof(u64) * adapter->req_rx_queues + 3835 sizeof(u64) * adapter->req_rx_queues + 3836 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3837 3838 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3839 if (!login_rsp_buffer) 3840 goto buf_rsp_alloc_failed; 3841 3842 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3843 rsp_buffer_size, DMA_FROM_DEVICE); 3844 if (dma_mapping_error(dev, rsp_buffer_token)) { 3845 dev_err(dev, "Couldn't map login rsp buffer\n"); 3846 goto buf_rsp_map_failed; 3847 } 3848 3849 adapter->login_buf = login_buffer; 3850 adapter->login_buf_token = buffer_token; 3851 adapter->login_buf_sz = buffer_size; 3852 adapter->login_rsp_buf = login_rsp_buffer; 3853 adapter->login_rsp_buf_token = rsp_buffer_token; 3854 adapter->login_rsp_buf_sz = rsp_buffer_size; 3855 3856 login_buffer->len = cpu_to_be32(buffer_size); 3857 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3858 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3859 login_buffer->off_txcomp_subcrqs = 3860 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3861 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3862 login_buffer->off_rxcomp_subcrqs = 3863 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3864 sizeof(u64) * adapter->req_tx_queues); 3865 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3866 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3867 3868 tx_list_p = (__be64 *)((char *)login_buffer + 3869 sizeof(struct ibmvnic_login_buffer)); 3870 rx_list_p = (__be64 *)((char *)login_buffer + 3871 sizeof(struct ibmvnic_login_buffer) + 3872 sizeof(u64) * adapter->req_tx_queues); 3873 3874 for (i = 0; i < adapter->req_tx_queues; i++) { 3875 if (adapter->tx_scrq[i]) { 3876 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3877 crq_num); 3878 } 3879 } 3880 3881 for (i = 0; i < adapter->req_rx_queues; i++) { 3882 if (adapter->rx_scrq[i]) { 3883 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3884 crq_num); 3885 } 3886 } 3887 3888 /* Insert vNIC login client data */ 3889 vlcd = (struct vnic_login_client_data *) 3890 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3891 login_buffer->client_data_offset = 3892 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3893 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3894 3895 vnic_add_client_data(adapter, vlcd); 3896 3897 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3898 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3899 netdev_dbg(adapter->netdev, "%016lx\n", 3900 ((unsigned long int *)(adapter->login_buf))[i]); 3901 } 3902 3903 memset(&crq, 0, sizeof(crq)); 3904 crq.login.first = IBMVNIC_CRQ_CMD; 3905 crq.login.cmd = LOGIN; 3906 crq.login.ioba = cpu_to_be32(buffer_token); 3907 crq.login.len = cpu_to_be32(buffer_size); 3908 ibmvnic_send_crq(adapter, &crq); 3909 3910 return 0; 3911 3912 buf_rsp_map_failed: 3913 kfree(login_rsp_buffer); 3914 buf_rsp_alloc_failed: 3915 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3916 buf_map_failed: 3917 kfree(login_buffer); 3918 buf_alloc_failed: 3919 return -1; 3920 } 3921 3922 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3923 u32 len, u8 map_id) 3924 { 3925 union ibmvnic_crq crq; 3926 3927 memset(&crq, 0, sizeof(crq)); 3928 crq.request_map.first = IBMVNIC_CRQ_CMD; 3929 crq.request_map.cmd = REQUEST_MAP; 3930 crq.request_map.map_id = map_id; 3931 crq.request_map.ioba = cpu_to_be32(addr); 3932 crq.request_map.len = cpu_to_be32(len); 3933 return ibmvnic_send_crq(adapter, &crq); 3934 } 3935 3936 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3937 { 3938 union ibmvnic_crq crq; 3939 3940 memset(&crq, 0, sizeof(crq)); 3941 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3942 crq.request_unmap.cmd = REQUEST_UNMAP; 3943 crq.request_unmap.map_id = map_id; 3944 return ibmvnic_send_crq(adapter, &crq); 3945 } 3946 3947 static void send_query_map(struct ibmvnic_adapter *adapter) 3948 { 3949 union ibmvnic_crq crq; 3950 3951 memset(&crq, 0, sizeof(crq)); 3952 crq.query_map.first = IBMVNIC_CRQ_CMD; 3953 crq.query_map.cmd = QUERY_MAP; 3954 ibmvnic_send_crq(adapter, &crq); 3955 } 3956 3957 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3958 static void send_query_cap(struct ibmvnic_adapter *adapter) 3959 { 3960 union ibmvnic_crq crq; 3961 3962 atomic_set(&adapter->running_cap_crqs, 0); 3963 memset(&crq, 0, sizeof(crq)); 3964 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3965 crq.query_capability.cmd = QUERY_CAPABILITY; 3966 3967 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3968 atomic_inc(&adapter->running_cap_crqs); 3969 ibmvnic_send_crq(adapter, &crq); 3970 3971 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3972 atomic_inc(&adapter->running_cap_crqs); 3973 ibmvnic_send_crq(adapter, &crq); 3974 3975 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3976 atomic_inc(&adapter->running_cap_crqs); 3977 ibmvnic_send_crq(adapter, &crq); 3978 3979 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3980 atomic_inc(&adapter->running_cap_crqs); 3981 ibmvnic_send_crq(adapter, &crq); 3982 3983 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3984 atomic_inc(&adapter->running_cap_crqs); 3985 ibmvnic_send_crq(adapter, &crq); 3986 3987 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3988 atomic_inc(&adapter->running_cap_crqs); 3989 ibmvnic_send_crq(adapter, &crq); 3990 3991 crq.query_capability.capability = 3992 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3993 atomic_inc(&adapter->running_cap_crqs); 3994 ibmvnic_send_crq(adapter, &crq); 3995 3996 crq.query_capability.capability = 3997 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3998 atomic_inc(&adapter->running_cap_crqs); 3999 ibmvnic_send_crq(adapter, &crq); 4000 4001 crq.query_capability.capability = 4002 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4003 atomic_inc(&adapter->running_cap_crqs); 4004 ibmvnic_send_crq(adapter, &crq); 4005 4006 crq.query_capability.capability = 4007 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4008 atomic_inc(&adapter->running_cap_crqs); 4009 ibmvnic_send_crq(adapter, &crq); 4010 4011 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4012 atomic_inc(&adapter->running_cap_crqs); 4013 ibmvnic_send_crq(adapter, &crq); 4014 4015 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4016 atomic_inc(&adapter->running_cap_crqs); 4017 ibmvnic_send_crq(adapter, &crq); 4018 4019 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4020 atomic_inc(&adapter->running_cap_crqs); 4021 ibmvnic_send_crq(adapter, &crq); 4022 4023 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4024 atomic_inc(&adapter->running_cap_crqs); 4025 ibmvnic_send_crq(adapter, &crq); 4026 4027 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4028 atomic_inc(&adapter->running_cap_crqs); 4029 ibmvnic_send_crq(adapter, &crq); 4030 4031 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4032 atomic_inc(&adapter->running_cap_crqs); 4033 ibmvnic_send_crq(adapter, &crq); 4034 4035 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4036 atomic_inc(&adapter->running_cap_crqs); 4037 ibmvnic_send_crq(adapter, &crq); 4038 4039 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4040 atomic_inc(&adapter->running_cap_crqs); 4041 ibmvnic_send_crq(adapter, &crq); 4042 4043 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4044 atomic_inc(&adapter->running_cap_crqs); 4045 ibmvnic_send_crq(adapter, &crq); 4046 4047 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4048 atomic_inc(&adapter->running_cap_crqs); 4049 ibmvnic_send_crq(adapter, &crq); 4050 4051 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4052 atomic_inc(&adapter->running_cap_crqs); 4053 ibmvnic_send_crq(adapter, &crq); 4054 4055 crq.query_capability.capability = 4056 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4057 atomic_inc(&adapter->running_cap_crqs); 4058 ibmvnic_send_crq(adapter, &crq); 4059 4060 crq.query_capability.capability = 4061 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4062 atomic_inc(&adapter->running_cap_crqs); 4063 ibmvnic_send_crq(adapter, &crq); 4064 4065 crq.query_capability.capability = 4066 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4067 atomic_inc(&adapter->running_cap_crqs); 4068 ibmvnic_send_crq(adapter, &crq); 4069 4070 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4071 atomic_inc(&adapter->running_cap_crqs); 4072 ibmvnic_send_crq(adapter, &crq); 4073 } 4074 4075 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4076 { 4077 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4078 struct device *dev = &adapter->vdev->dev; 4079 union ibmvnic_crq crq; 4080 4081 adapter->ip_offload_tok = 4082 dma_map_single(dev, 4083 &adapter->ip_offload_buf, 4084 buf_sz, 4085 DMA_FROM_DEVICE); 4086 4087 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4088 if (!firmware_has_feature(FW_FEATURE_CMO)) 4089 dev_err(dev, "Couldn't map offload buffer\n"); 4090 return; 4091 } 4092 4093 memset(&crq, 0, sizeof(crq)); 4094 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4095 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4096 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4097 crq.query_ip_offload.ioba = 4098 cpu_to_be32(adapter->ip_offload_tok); 4099 4100 ibmvnic_send_crq(adapter, &crq); 4101 } 4102 4103 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4104 { 4105 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4106 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4107 struct device *dev = &adapter->vdev->dev; 4108 netdev_features_t old_hw_features = 0; 4109 union ibmvnic_crq crq; 4110 4111 adapter->ip_offload_ctrl_tok = 4112 dma_map_single(dev, 4113 ctrl_buf, 4114 sizeof(adapter->ip_offload_ctrl), 4115 DMA_TO_DEVICE); 4116 4117 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4118 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4119 return; 4120 } 4121 4122 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4123 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4124 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4125 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4126 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4127 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4128 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4129 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4130 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4131 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4132 4133 /* large_rx disabled for now, additional features needed */ 4134 ctrl_buf->large_rx_ipv4 = 0; 4135 ctrl_buf->large_rx_ipv6 = 0; 4136 4137 if (adapter->state != VNIC_PROBING) { 4138 old_hw_features = adapter->netdev->hw_features; 4139 adapter->netdev->hw_features = 0; 4140 } 4141 4142 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4143 4144 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4145 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4146 4147 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4148 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4149 4150 if ((adapter->netdev->features & 4151 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4152 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4153 4154 if (buf->large_tx_ipv4) 4155 adapter->netdev->hw_features |= NETIF_F_TSO; 4156 if (buf->large_tx_ipv6) 4157 adapter->netdev->hw_features |= NETIF_F_TSO6; 4158 4159 if (adapter->state == VNIC_PROBING) { 4160 adapter->netdev->features |= adapter->netdev->hw_features; 4161 } else if (old_hw_features != adapter->netdev->hw_features) { 4162 netdev_features_t tmp = 0; 4163 4164 /* disable features no longer supported */ 4165 adapter->netdev->features &= adapter->netdev->hw_features; 4166 /* turn on features now supported if previously enabled */ 4167 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4168 adapter->netdev->hw_features; 4169 adapter->netdev->features |= 4170 tmp & adapter->netdev->wanted_features; 4171 } 4172 4173 memset(&crq, 0, sizeof(crq)); 4174 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4175 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4176 crq.control_ip_offload.len = 4177 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4178 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4179 ibmvnic_send_crq(adapter, &crq); 4180 } 4181 4182 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4183 struct ibmvnic_adapter *adapter) 4184 { 4185 struct device *dev = &adapter->vdev->dev; 4186 4187 if (crq->get_vpd_size_rsp.rc.code) { 4188 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4189 crq->get_vpd_size_rsp.rc.code); 4190 complete(&adapter->fw_done); 4191 return; 4192 } 4193 4194 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4195 complete(&adapter->fw_done); 4196 } 4197 4198 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4199 struct ibmvnic_adapter *adapter) 4200 { 4201 struct device *dev = &adapter->vdev->dev; 4202 unsigned char *substr = NULL; 4203 u8 fw_level_len = 0; 4204 4205 memset(adapter->fw_version, 0, 32); 4206 4207 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4208 DMA_FROM_DEVICE); 4209 4210 if (crq->get_vpd_rsp.rc.code) { 4211 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4212 crq->get_vpd_rsp.rc.code); 4213 goto complete; 4214 } 4215 4216 /* get the position of the firmware version info 4217 * located after the ASCII 'RM' substring in the buffer 4218 */ 4219 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4220 if (!substr) { 4221 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4222 goto complete; 4223 } 4224 4225 /* get length of firmware level ASCII substring */ 4226 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4227 fw_level_len = *(substr + 2); 4228 } else { 4229 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4230 goto complete; 4231 } 4232 4233 /* copy firmware version string from vpd into adapter */ 4234 if ((substr + 3 + fw_level_len) < 4235 (adapter->vpd->buff + adapter->vpd->len)) { 4236 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4237 } else { 4238 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4239 } 4240 4241 complete: 4242 if (adapter->fw_version[0] == '\0') 4243 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4244 complete(&adapter->fw_done); 4245 } 4246 4247 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4248 { 4249 struct device *dev = &adapter->vdev->dev; 4250 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4251 int i; 4252 4253 dma_unmap_single(dev, adapter->ip_offload_tok, 4254 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4255 4256 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4257 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4258 netdev_dbg(adapter->netdev, "%016lx\n", 4259 ((unsigned long int *)(buf))[i]); 4260 4261 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4262 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4263 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4264 buf->tcp_ipv4_chksum); 4265 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4266 buf->tcp_ipv6_chksum); 4267 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4268 buf->udp_ipv4_chksum); 4269 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4270 buf->udp_ipv6_chksum); 4271 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4272 buf->large_tx_ipv4); 4273 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4274 buf->large_tx_ipv6); 4275 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4276 buf->large_rx_ipv4); 4277 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4278 buf->large_rx_ipv6); 4279 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4280 buf->max_ipv4_header_size); 4281 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4282 buf->max_ipv6_header_size); 4283 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4284 buf->max_tcp_header_size); 4285 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4286 buf->max_udp_header_size); 4287 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4288 buf->max_large_tx_size); 4289 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4290 buf->max_large_rx_size); 4291 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4292 buf->ipv6_extension_header); 4293 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4294 buf->tcp_pseudosum_req); 4295 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4296 buf->num_ipv6_ext_headers); 4297 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4298 buf->off_ipv6_ext_headers); 4299 4300 send_control_ip_offload(adapter); 4301 } 4302 4303 static const char *ibmvnic_fw_err_cause(u16 cause) 4304 { 4305 switch (cause) { 4306 case ADAPTER_PROBLEM: 4307 return "adapter problem"; 4308 case BUS_PROBLEM: 4309 return "bus problem"; 4310 case FW_PROBLEM: 4311 return "firmware problem"; 4312 case DD_PROBLEM: 4313 return "device driver problem"; 4314 case EEH_RECOVERY: 4315 return "EEH recovery"; 4316 case FW_UPDATED: 4317 return "firmware updated"; 4318 case LOW_MEMORY: 4319 return "low Memory"; 4320 default: 4321 return "unknown"; 4322 } 4323 } 4324 4325 static void handle_error_indication(union ibmvnic_crq *crq, 4326 struct ibmvnic_adapter *adapter) 4327 { 4328 struct device *dev = &adapter->vdev->dev; 4329 u16 cause; 4330 4331 cause = be16_to_cpu(crq->error_indication.error_cause); 4332 4333 dev_warn_ratelimited(dev, 4334 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4335 crq->error_indication.flags 4336 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4337 ibmvnic_fw_err_cause(cause)); 4338 4339 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4340 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4341 else 4342 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4343 } 4344 4345 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4346 struct ibmvnic_adapter *adapter) 4347 { 4348 struct net_device *netdev = adapter->netdev; 4349 struct device *dev = &adapter->vdev->dev; 4350 long rc; 4351 4352 rc = crq->change_mac_addr_rsp.rc.code; 4353 if (rc) { 4354 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4355 goto out; 4356 } 4357 /* crq->change_mac_addr.mac_addr is the requested one 4358 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4359 */ 4360 ether_addr_copy(netdev->dev_addr, 4361 &crq->change_mac_addr_rsp.mac_addr[0]); 4362 ether_addr_copy(adapter->mac_addr, 4363 &crq->change_mac_addr_rsp.mac_addr[0]); 4364 out: 4365 complete(&adapter->fw_done); 4366 return rc; 4367 } 4368 4369 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4370 struct ibmvnic_adapter *adapter) 4371 { 4372 struct device *dev = &adapter->vdev->dev; 4373 u64 *req_value; 4374 char *name; 4375 4376 atomic_dec(&adapter->running_cap_crqs); 4377 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4378 case REQ_TX_QUEUES: 4379 req_value = &adapter->req_tx_queues; 4380 name = "tx"; 4381 break; 4382 case REQ_RX_QUEUES: 4383 req_value = &adapter->req_rx_queues; 4384 name = "rx"; 4385 break; 4386 case REQ_RX_ADD_QUEUES: 4387 req_value = &adapter->req_rx_add_queues; 4388 name = "rx_add"; 4389 break; 4390 case REQ_TX_ENTRIES_PER_SUBCRQ: 4391 req_value = &adapter->req_tx_entries_per_subcrq; 4392 name = "tx_entries_per_subcrq"; 4393 break; 4394 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4395 req_value = &adapter->req_rx_add_entries_per_subcrq; 4396 name = "rx_add_entries_per_subcrq"; 4397 break; 4398 case REQ_MTU: 4399 req_value = &adapter->req_mtu; 4400 name = "mtu"; 4401 break; 4402 case PROMISC_REQUESTED: 4403 req_value = &adapter->promisc; 4404 name = "promisc"; 4405 break; 4406 default: 4407 dev_err(dev, "Got invalid cap request rsp %d\n", 4408 crq->request_capability.capability); 4409 return; 4410 } 4411 4412 switch (crq->request_capability_rsp.rc.code) { 4413 case SUCCESS: 4414 break; 4415 case PARTIALSUCCESS: 4416 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4417 *req_value, 4418 (long int)be64_to_cpu(crq->request_capability_rsp. 4419 number), name); 4420 4421 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4422 REQ_MTU) { 4423 pr_err("mtu of %llu is not supported. Reverting.\n", 4424 *req_value); 4425 *req_value = adapter->fallback.mtu; 4426 } else { 4427 *req_value = 4428 be64_to_cpu(crq->request_capability_rsp.number); 4429 } 4430 4431 send_request_cap(adapter, 1); 4432 return; 4433 default: 4434 dev_err(dev, "Error %d in request cap rsp\n", 4435 crq->request_capability_rsp.rc.code); 4436 return; 4437 } 4438 4439 /* Done receiving requested capabilities, query IP offload support */ 4440 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4441 adapter->wait_capability = false; 4442 send_query_ip_offload(adapter); 4443 } 4444 } 4445 4446 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4447 struct ibmvnic_adapter *adapter) 4448 { 4449 struct device *dev = &adapter->vdev->dev; 4450 struct net_device *netdev = adapter->netdev; 4451 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4452 struct ibmvnic_login_buffer *login = adapter->login_buf; 4453 u64 *tx_handle_array; 4454 u64 *rx_handle_array; 4455 int num_tx_pools; 4456 int num_rx_pools; 4457 u64 *size_array; 4458 int i; 4459 4460 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4461 DMA_TO_DEVICE); 4462 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4463 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4464 4465 /* If the number of queues requested can't be allocated by the 4466 * server, the login response will return with code 1. We will need 4467 * to resend the login buffer with fewer queues requested. 4468 */ 4469 if (login_rsp_crq->generic.rc.code) { 4470 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4471 complete(&adapter->init_done); 4472 return 0; 4473 } 4474 4475 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4476 4477 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4478 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4479 netdev_dbg(adapter->netdev, "%016lx\n", 4480 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4481 } 4482 4483 /* Sanity checks */ 4484 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4485 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4486 adapter->req_rx_add_queues != 4487 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4488 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4489 ibmvnic_remove(adapter->vdev); 4490 return -EIO; 4491 } 4492 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4493 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4494 /* variable buffer sizes are not supported, so just read the 4495 * first entry. 4496 */ 4497 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4498 4499 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4500 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4501 4502 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4503 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4504 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4505 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4506 4507 for (i = 0; i < num_tx_pools; i++) 4508 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4509 4510 for (i = 0; i < num_rx_pools; i++) 4511 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4512 4513 adapter->num_active_tx_scrqs = num_tx_pools; 4514 adapter->num_active_rx_scrqs = num_rx_pools; 4515 release_login_rsp_buffer(adapter); 4516 release_login_buffer(adapter); 4517 complete(&adapter->init_done); 4518 4519 return 0; 4520 } 4521 4522 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4523 struct ibmvnic_adapter *adapter) 4524 { 4525 struct device *dev = &adapter->vdev->dev; 4526 long rc; 4527 4528 rc = crq->request_unmap_rsp.rc.code; 4529 if (rc) 4530 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4531 } 4532 4533 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4534 struct ibmvnic_adapter *adapter) 4535 { 4536 struct net_device *netdev = adapter->netdev; 4537 struct device *dev = &adapter->vdev->dev; 4538 long rc; 4539 4540 rc = crq->query_map_rsp.rc.code; 4541 if (rc) { 4542 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4543 return; 4544 } 4545 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4546 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4547 crq->query_map_rsp.free_pages); 4548 } 4549 4550 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4551 struct ibmvnic_adapter *adapter) 4552 { 4553 struct net_device *netdev = adapter->netdev; 4554 struct device *dev = &adapter->vdev->dev; 4555 long rc; 4556 4557 atomic_dec(&adapter->running_cap_crqs); 4558 netdev_dbg(netdev, "Outstanding queries: %d\n", 4559 atomic_read(&adapter->running_cap_crqs)); 4560 rc = crq->query_capability.rc.code; 4561 if (rc) { 4562 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4563 goto out; 4564 } 4565 4566 switch (be16_to_cpu(crq->query_capability.capability)) { 4567 case MIN_TX_QUEUES: 4568 adapter->min_tx_queues = 4569 be64_to_cpu(crq->query_capability.number); 4570 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4571 adapter->min_tx_queues); 4572 break; 4573 case MIN_RX_QUEUES: 4574 adapter->min_rx_queues = 4575 be64_to_cpu(crq->query_capability.number); 4576 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4577 adapter->min_rx_queues); 4578 break; 4579 case MIN_RX_ADD_QUEUES: 4580 adapter->min_rx_add_queues = 4581 be64_to_cpu(crq->query_capability.number); 4582 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4583 adapter->min_rx_add_queues); 4584 break; 4585 case MAX_TX_QUEUES: 4586 adapter->max_tx_queues = 4587 be64_to_cpu(crq->query_capability.number); 4588 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4589 adapter->max_tx_queues); 4590 break; 4591 case MAX_RX_QUEUES: 4592 adapter->max_rx_queues = 4593 be64_to_cpu(crq->query_capability.number); 4594 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4595 adapter->max_rx_queues); 4596 break; 4597 case MAX_RX_ADD_QUEUES: 4598 adapter->max_rx_add_queues = 4599 be64_to_cpu(crq->query_capability.number); 4600 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4601 adapter->max_rx_add_queues); 4602 break; 4603 case MIN_TX_ENTRIES_PER_SUBCRQ: 4604 adapter->min_tx_entries_per_subcrq = 4605 be64_to_cpu(crq->query_capability.number); 4606 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4607 adapter->min_tx_entries_per_subcrq); 4608 break; 4609 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4610 adapter->min_rx_add_entries_per_subcrq = 4611 be64_to_cpu(crq->query_capability.number); 4612 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4613 adapter->min_rx_add_entries_per_subcrq); 4614 break; 4615 case MAX_TX_ENTRIES_PER_SUBCRQ: 4616 adapter->max_tx_entries_per_subcrq = 4617 be64_to_cpu(crq->query_capability.number); 4618 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4619 adapter->max_tx_entries_per_subcrq); 4620 break; 4621 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4622 adapter->max_rx_add_entries_per_subcrq = 4623 be64_to_cpu(crq->query_capability.number); 4624 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4625 adapter->max_rx_add_entries_per_subcrq); 4626 break; 4627 case TCP_IP_OFFLOAD: 4628 adapter->tcp_ip_offload = 4629 be64_to_cpu(crq->query_capability.number); 4630 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4631 adapter->tcp_ip_offload); 4632 break; 4633 case PROMISC_SUPPORTED: 4634 adapter->promisc_supported = 4635 be64_to_cpu(crq->query_capability.number); 4636 netdev_dbg(netdev, "promisc_supported = %lld\n", 4637 adapter->promisc_supported); 4638 break; 4639 case MIN_MTU: 4640 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4641 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4642 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4643 break; 4644 case MAX_MTU: 4645 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4646 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4647 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4648 break; 4649 case MAX_MULTICAST_FILTERS: 4650 adapter->max_multicast_filters = 4651 be64_to_cpu(crq->query_capability.number); 4652 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4653 adapter->max_multicast_filters); 4654 break; 4655 case VLAN_HEADER_INSERTION: 4656 adapter->vlan_header_insertion = 4657 be64_to_cpu(crq->query_capability.number); 4658 if (adapter->vlan_header_insertion) 4659 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4660 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4661 adapter->vlan_header_insertion); 4662 break; 4663 case RX_VLAN_HEADER_INSERTION: 4664 adapter->rx_vlan_header_insertion = 4665 be64_to_cpu(crq->query_capability.number); 4666 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4667 adapter->rx_vlan_header_insertion); 4668 break; 4669 case MAX_TX_SG_ENTRIES: 4670 adapter->max_tx_sg_entries = 4671 be64_to_cpu(crq->query_capability.number); 4672 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4673 adapter->max_tx_sg_entries); 4674 break; 4675 case RX_SG_SUPPORTED: 4676 adapter->rx_sg_supported = 4677 be64_to_cpu(crq->query_capability.number); 4678 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4679 adapter->rx_sg_supported); 4680 break; 4681 case OPT_TX_COMP_SUB_QUEUES: 4682 adapter->opt_tx_comp_sub_queues = 4683 be64_to_cpu(crq->query_capability.number); 4684 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4685 adapter->opt_tx_comp_sub_queues); 4686 break; 4687 case OPT_RX_COMP_QUEUES: 4688 adapter->opt_rx_comp_queues = 4689 be64_to_cpu(crq->query_capability.number); 4690 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4691 adapter->opt_rx_comp_queues); 4692 break; 4693 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4694 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4695 be64_to_cpu(crq->query_capability.number); 4696 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4697 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4698 break; 4699 case OPT_TX_ENTRIES_PER_SUBCRQ: 4700 adapter->opt_tx_entries_per_subcrq = 4701 be64_to_cpu(crq->query_capability.number); 4702 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4703 adapter->opt_tx_entries_per_subcrq); 4704 break; 4705 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4706 adapter->opt_rxba_entries_per_subcrq = 4707 be64_to_cpu(crq->query_capability.number); 4708 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4709 adapter->opt_rxba_entries_per_subcrq); 4710 break; 4711 case TX_RX_DESC_REQ: 4712 adapter->tx_rx_desc_req = crq->query_capability.number; 4713 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4714 adapter->tx_rx_desc_req); 4715 break; 4716 4717 default: 4718 netdev_err(netdev, "Got invalid cap rsp %d\n", 4719 crq->query_capability.capability); 4720 } 4721 4722 out: 4723 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4724 adapter->wait_capability = false; 4725 send_request_cap(adapter, 0); 4726 } 4727 } 4728 4729 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4730 { 4731 union ibmvnic_crq crq; 4732 int rc; 4733 4734 memset(&crq, 0, sizeof(crq)); 4735 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4736 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4737 4738 mutex_lock(&adapter->fw_lock); 4739 adapter->fw_done_rc = 0; 4740 reinit_completion(&adapter->fw_done); 4741 4742 rc = ibmvnic_send_crq(adapter, &crq); 4743 if (rc) { 4744 mutex_unlock(&adapter->fw_lock); 4745 return rc; 4746 } 4747 4748 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4749 if (rc) { 4750 mutex_unlock(&adapter->fw_lock); 4751 return rc; 4752 } 4753 4754 mutex_unlock(&adapter->fw_lock); 4755 return adapter->fw_done_rc ? -EIO : 0; 4756 } 4757 4758 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4759 struct ibmvnic_adapter *adapter) 4760 { 4761 struct net_device *netdev = adapter->netdev; 4762 int rc; 4763 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4764 4765 rc = crq->query_phys_parms_rsp.rc.code; 4766 if (rc) { 4767 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4768 return rc; 4769 } 4770 switch (rspeed) { 4771 case IBMVNIC_10MBPS: 4772 adapter->speed = SPEED_10; 4773 break; 4774 case IBMVNIC_100MBPS: 4775 adapter->speed = SPEED_100; 4776 break; 4777 case IBMVNIC_1GBPS: 4778 adapter->speed = SPEED_1000; 4779 break; 4780 case IBMVNIC_10GBPS: 4781 adapter->speed = SPEED_10000; 4782 break; 4783 case IBMVNIC_25GBPS: 4784 adapter->speed = SPEED_25000; 4785 break; 4786 case IBMVNIC_40GBPS: 4787 adapter->speed = SPEED_40000; 4788 break; 4789 case IBMVNIC_50GBPS: 4790 adapter->speed = SPEED_50000; 4791 break; 4792 case IBMVNIC_100GBPS: 4793 adapter->speed = SPEED_100000; 4794 break; 4795 case IBMVNIC_200GBPS: 4796 adapter->speed = SPEED_200000; 4797 break; 4798 default: 4799 if (netif_carrier_ok(netdev)) 4800 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4801 adapter->speed = SPEED_UNKNOWN; 4802 } 4803 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4804 adapter->duplex = DUPLEX_FULL; 4805 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4806 adapter->duplex = DUPLEX_HALF; 4807 else 4808 adapter->duplex = DUPLEX_UNKNOWN; 4809 4810 return rc; 4811 } 4812 4813 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4814 struct ibmvnic_adapter *adapter) 4815 { 4816 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4817 struct net_device *netdev = adapter->netdev; 4818 struct device *dev = &adapter->vdev->dev; 4819 u64 *u64_crq = (u64 *)crq; 4820 long rc; 4821 4822 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4823 (unsigned long int)cpu_to_be64(u64_crq[0]), 4824 (unsigned long int)cpu_to_be64(u64_crq[1])); 4825 switch (gen_crq->first) { 4826 case IBMVNIC_CRQ_INIT_RSP: 4827 switch (gen_crq->cmd) { 4828 case IBMVNIC_CRQ_INIT: 4829 dev_info(dev, "Partner initialized\n"); 4830 adapter->from_passive_init = true; 4831 if (!completion_done(&adapter->init_done)) { 4832 complete(&adapter->init_done); 4833 adapter->init_done_rc = -EIO; 4834 } 4835 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4836 break; 4837 case IBMVNIC_CRQ_INIT_COMPLETE: 4838 dev_info(dev, "Partner initialization complete\n"); 4839 adapter->crq.active = true; 4840 send_version_xchg(adapter); 4841 break; 4842 default: 4843 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4844 } 4845 return; 4846 case IBMVNIC_CRQ_XPORT_EVENT: 4847 netif_carrier_off(netdev); 4848 adapter->crq.active = false; 4849 /* terminate any thread waiting for a response 4850 * from the device 4851 */ 4852 if (!completion_done(&adapter->fw_done)) { 4853 adapter->fw_done_rc = -EIO; 4854 complete(&adapter->fw_done); 4855 } 4856 if (!completion_done(&adapter->stats_done)) 4857 complete(&adapter->stats_done); 4858 if (test_bit(0, &adapter->resetting)) 4859 adapter->force_reset_recovery = true; 4860 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4861 dev_info(dev, "Migrated, re-enabling adapter\n"); 4862 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4863 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4864 dev_info(dev, "Backing device failover detected\n"); 4865 adapter->failover_pending = true; 4866 } else { 4867 /* The adapter lost the connection */ 4868 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4869 gen_crq->cmd); 4870 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4871 } 4872 return; 4873 case IBMVNIC_CRQ_CMD_RSP: 4874 break; 4875 default: 4876 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4877 gen_crq->first); 4878 return; 4879 } 4880 4881 switch (gen_crq->cmd) { 4882 case VERSION_EXCHANGE_RSP: 4883 rc = crq->version_exchange_rsp.rc.code; 4884 if (rc) { 4885 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4886 break; 4887 } 4888 ibmvnic_version = 4889 be16_to_cpu(crq->version_exchange_rsp.version); 4890 dev_info(dev, "Partner protocol version is %d\n", 4891 ibmvnic_version); 4892 send_query_cap(adapter); 4893 break; 4894 case QUERY_CAPABILITY_RSP: 4895 handle_query_cap_rsp(crq, adapter); 4896 break; 4897 case QUERY_MAP_RSP: 4898 handle_query_map_rsp(crq, adapter); 4899 break; 4900 case REQUEST_MAP_RSP: 4901 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4902 complete(&adapter->fw_done); 4903 break; 4904 case REQUEST_UNMAP_RSP: 4905 handle_request_unmap_rsp(crq, adapter); 4906 break; 4907 case REQUEST_CAPABILITY_RSP: 4908 handle_request_cap_rsp(crq, adapter); 4909 break; 4910 case LOGIN_RSP: 4911 netdev_dbg(netdev, "Got Login Response\n"); 4912 handle_login_rsp(crq, adapter); 4913 break; 4914 case LOGICAL_LINK_STATE_RSP: 4915 netdev_dbg(netdev, 4916 "Got Logical Link State Response, state: %d rc: %d\n", 4917 crq->logical_link_state_rsp.link_state, 4918 crq->logical_link_state_rsp.rc.code); 4919 adapter->logical_link_state = 4920 crq->logical_link_state_rsp.link_state; 4921 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4922 complete(&adapter->init_done); 4923 break; 4924 case LINK_STATE_INDICATION: 4925 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4926 adapter->phys_link_state = 4927 crq->link_state_indication.phys_link_state; 4928 adapter->logical_link_state = 4929 crq->link_state_indication.logical_link_state; 4930 if (adapter->phys_link_state && adapter->logical_link_state) 4931 netif_carrier_on(netdev); 4932 else 4933 netif_carrier_off(netdev); 4934 break; 4935 case CHANGE_MAC_ADDR_RSP: 4936 netdev_dbg(netdev, "Got MAC address change Response\n"); 4937 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4938 break; 4939 case ERROR_INDICATION: 4940 netdev_dbg(netdev, "Got Error Indication\n"); 4941 handle_error_indication(crq, adapter); 4942 break; 4943 case REQUEST_STATISTICS_RSP: 4944 netdev_dbg(netdev, "Got Statistics Response\n"); 4945 complete(&adapter->stats_done); 4946 break; 4947 case QUERY_IP_OFFLOAD_RSP: 4948 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4949 handle_query_ip_offload_rsp(adapter); 4950 break; 4951 case MULTICAST_CTRL_RSP: 4952 netdev_dbg(netdev, "Got multicast control Response\n"); 4953 break; 4954 case CONTROL_IP_OFFLOAD_RSP: 4955 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4956 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4957 sizeof(adapter->ip_offload_ctrl), 4958 DMA_TO_DEVICE); 4959 complete(&adapter->init_done); 4960 break; 4961 case COLLECT_FW_TRACE_RSP: 4962 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4963 complete(&adapter->fw_done); 4964 break; 4965 case GET_VPD_SIZE_RSP: 4966 handle_vpd_size_rsp(crq, adapter); 4967 break; 4968 case GET_VPD_RSP: 4969 handle_vpd_rsp(crq, adapter); 4970 break; 4971 case QUERY_PHYS_PARMS_RSP: 4972 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4973 complete(&adapter->fw_done); 4974 break; 4975 default: 4976 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4977 gen_crq->cmd); 4978 } 4979 } 4980 4981 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4982 { 4983 struct ibmvnic_adapter *adapter = instance; 4984 4985 tasklet_schedule(&adapter->tasklet); 4986 return IRQ_HANDLED; 4987 } 4988 4989 static void ibmvnic_tasklet(struct tasklet_struct *t) 4990 { 4991 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4992 struct ibmvnic_crq_queue *queue = &adapter->crq; 4993 union ibmvnic_crq *crq; 4994 unsigned long flags; 4995 bool done = false; 4996 4997 spin_lock_irqsave(&queue->lock, flags); 4998 while (!done) { 4999 /* Pull all the valid messages off the CRQ */ 5000 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5001 ibmvnic_handle_crq(crq, adapter); 5002 crq->generic.first = 0; 5003 } 5004 5005 /* remain in tasklet until all 5006 * capabilities responses are received 5007 */ 5008 if (!adapter->wait_capability) 5009 done = true; 5010 } 5011 /* if capabilities CRQ's were sent in this tasklet, the following 5012 * tasklet must wait until all responses are received 5013 */ 5014 if (atomic_read(&adapter->running_cap_crqs) != 0) 5015 adapter->wait_capability = true; 5016 spin_unlock_irqrestore(&queue->lock, flags); 5017 } 5018 5019 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5020 { 5021 struct vio_dev *vdev = adapter->vdev; 5022 int rc; 5023 5024 do { 5025 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5026 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5027 5028 if (rc) 5029 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5030 5031 return rc; 5032 } 5033 5034 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5035 { 5036 struct ibmvnic_crq_queue *crq = &adapter->crq; 5037 struct device *dev = &adapter->vdev->dev; 5038 struct vio_dev *vdev = adapter->vdev; 5039 int rc; 5040 5041 /* Close the CRQ */ 5042 do { 5043 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5044 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5045 5046 /* Clean out the queue */ 5047 memset(crq->msgs, 0, PAGE_SIZE); 5048 crq->cur = 0; 5049 crq->active = false; 5050 5051 /* And re-open it again */ 5052 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5053 crq->msg_token, PAGE_SIZE); 5054 5055 if (rc == H_CLOSED) 5056 /* Adapter is good, but other end is not ready */ 5057 dev_warn(dev, "Partner adapter not ready\n"); 5058 else if (rc != 0) 5059 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5060 5061 return rc; 5062 } 5063 5064 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5065 { 5066 struct ibmvnic_crq_queue *crq = &adapter->crq; 5067 struct vio_dev *vdev = adapter->vdev; 5068 long rc; 5069 5070 if (!crq->msgs) 5071 return; 5072 5073 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5074 free_irq(vdev->irq, adapter); 5075 tasklet_kill(&adapter->tasklet); 5076 do { 5077 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5078 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5079 5080 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5081 DMA_BIDIRECTIONAL); 5082 free_page((unsigned long)crq->msgs); 5083 crq->msgs = NULL; 5084 crq->active = false; 5085 } 5086 5087 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5088 { 5089 struct ibmvnic_crq_queue *crq = &adapter->crq; 5090 struct device *dev = &adapter->vdev->dev; 5091 struct vio_dev *vdev = adapter->vdev; 5092 int rc, retrc = -ENOMEM; 5093 5094 if (crq->msgs) 5095 return 0; 5096 5097 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5098 /* Should we allocate more than one page? */ 5099 5100 if (!crq->msgs) 5101 return -ENOMEM; 5102 5103 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5104 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5105 DMA_BIDIRECTIONAL); 5106 if (dma_mapping_error(dev, crq->msg_token)) 5107 goto map_failed; 5108 5109 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5110 crq->msg_token, PAGE_SIZE); 5111 5112 if (rc == H_RESOURCE) 5113 /* maybe kexecing and resource is busy. try a reset */ 5114 rc = ibmvnic_reset_crq(adapter); 5115 retrc = rc; 5116 5117 if (rc == H_CLOSED) { 5118 dev_warn(dev, "Partner adapter not ready\n"); 5119 } else if (rc) { 5120 dev_warn(dev, "Error %d opening adapter\n", rc); 5121 goto reg_crq_failed; 5122 } 5123 5124 retrc = 0; 5125 5126 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5127 5128 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5129 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5130 adapter->vdev->unit_address); 5131 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5132 if (rc) { 5133 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5134 vdev->irq, rc); 5135 goto req_irq_failed; 5136 } 5137 5138 rc = vio_enable_interrupts(vdev); 5139 if (rc) { 5140 dev_err(dev, "Error %d enabling interrupts\n", rc); 5141 goto req_irq_failed; 5142 } 5143 5144 crq->cur = 0; 5145 spin_lock_init(&crq->lock); 5146 5147 return retrc; 5148 5149 req_irq_failed: 5150 tasklet_kill(&adapter->tasklet); 5151 do { 5152 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5153 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5154 reg_crq_failed: 5155 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5156 map_failed: 5157 free_page((unsigned long)crq->msgs); 5158 crq->msgs = NULL; 5159 return retrc; 5160 } 5161 5162 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5163 { 5164 struct device *dev = &adapter->vdev->dev; 5165 unsigned long timeout = msecs_to_jiffies(30000); 5166 u64 old_num_rx_queues, old_num_tx_queues; 5167 int rc; 5168 5169 adapter->from_passive_init = false; 5170 5171 if (reset) { 5172 old_num_rx_queues = adapter->req_rx_queues; 5173 old_num_tx_queues = adapter->req_tx_queues; 5174 reinit_completion(&adapter->init_done); 5175 } 5176 5177 adapter->init_done_rc = 0; 5178 rc = ibmvnic_send_crq_init(adapter); 5179 if (rc) { 5180 dev_err(dev, "Send crq init failed with error %d\n", rc); 5181 return rc; 5182 } 5183 5184 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5185 dev_err(dev, "Initialization sequence timed out\n"); 5186 return -1; 5187 } 5188 5189 if (adapter->init_done_rc) { 5190 release_crq_queue(adapter); 5191 return adapter->init_done_rc; 5192 } 5193 5194 if (adapter->from_passive_init) { 5195 adapter->state = VNIC_OPEN; 5196 adapter->from_passive_init = false; 5197 return -1; 5198 } 5199 5200 if (reset && 5201 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5202 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5203 if (adapter->req_rx_queues != old_num_rx_queues || 5204 adapter->req_tx_queues != old_num_tx_queues) { 5205 release_sub_crqs(adapter, 0); 5206 rc = init_sub_crqs(adapter); 5207 } else { 5208 rc = reset_sub_crq_queues(adapter); 5209 } 5210 } else { 5211 rc = init_sub_crqs(adapter); 5212 } 5213 5214 if (rc) { 5215 dev_err(dev, "Initialization of sub crqs failed\n"); 5216 release_crq_queue(adapter); 5217 return rc; 5218 } 5219 5220 rc = init_sub_crq_irqs(adapter); 5221 if (rc) { 5222 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5223 release_crq_queue(adapter); 5224 } 5225 5226 return rc; 5227 } 5228 5229 static struct device_attribute dev_attr_failover; 5230 5231 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5232 { 5233 struct ibmvnic_adapter *adapter; 5234 struct net_device *netdev; 5235 unsigned char *mac_addr_p; 5236 int rc; 5237 5238 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5239 dev->unit_address); 5240 5241 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5242 VETH_MAC_ADDR, NULL); 5243 if (!mac_addr_p) { 5244 dev_err(&dev->dev, 5245 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5246 __FILE__, __LINE__); 5247 return 0; 5248 } 5249 5250 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5251 IBMVNIC_MAX_QUEUES); 5252 if (!netdev) 5253 return -ENOMEM; 5254 5255 adapter = netdev_priv(netdev); 5256 adapter->state = VNIC_PROBING; 5257 dev_set_drvdata(&dev->dev, netdev); 5258 adapter->vdev = dev; 5259 adapter->netdev = netdev; 5260 5261 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5262 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5263 netdev->irq = dev->irq; 5264 netdev->netdev_ops = &ibmvnic_netdev_ops; 5265 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5266 SET_NETDEV_DEV(netdev, &dev->dev); 5267 5268 spin_lock_init(&adapter->stats_lock); 5269 5270 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5271 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5272 __ibmvnic_delayed_reset); 5273 INIT_LIST_HEAD(&adapter->rwi_list); 5274 spin_lock_init(&adapter->rwi_lock); 5275 spin_lock_init(&adapter->state_lock); 5276 mutex_init(&adapter->fw_lock); 5277 init_completion(&adapter->init_done); 5278 init_completion(&adapter->fw_done); 5279 init_completion(&adapter->reset_done); 5280 init_completion(&adapter->stats_done); 5281 clear_bit(0, &adapter->resetting); 5282 5283 do { 5284 rc = init_crq_queue(adapter); 5285 if (rc) { 5286 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5287 rc); 5288 goto ibmvnic_init_fail; 5289 } 5290 5291 rc = ibmvnic_reset_init(adapter, false); 5292 if (rc && rc != EAGAIN) 5293 goto ibmvnic_init_fail; 5294 } while (rc == EAGAIN); 5295 5296 rc = init_stats_buffers(adapter); 5297 if (rc) 5298 goto ibmvnic_init_fail; 5299 5300 rc = init_stats_token(adapter); 5301 if (rc) 5302 goto ibmvnic_stats_fail; 5303 5304 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5305 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5306 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5307 5308 rc = device_create_file(&dev->dev, &dev_attr_failover); 5309 if (rc) 5310 goto ibmvnic_dev_file_err; 5311 5312 netif_carrier_off(netdev); 5313 rc = register_netdev(netdev); 5314 if (rc) { 5315 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5316 goto ibmvnic_register_fail; 5317 } 5318 dev_info(&dev->dev, "ibmvnic registered\n"); 5319 5320 adapter->state = VNIC_PROBED; 5321 5322 adapter->wait_for_reset = false; 5323 5324 return 0; 5325 5326 ibmvnic_register_fail: 5327 device_remove_file(&dev->dev, &dev_attr_failover); 5328 5329 ibmvnic_dev_file_err: 5330 release_stats_token(adapter); 5331 5332 ibmvnic_stats_fail: 5333 release_stats_buffers(adapter); 5334 5335 ibmvnic_init_fail: 5336 release_sub_crqs(adapter, 1); 5337 release_crq_queue(adapter); 5338 mutex_destroy(&adapter->fw_lock); 5339 free_netdev(netdev); 5340 5341 return rc; 5342 } 5343 5344 static int ibmvnic_remove(struct vio_dev *dev) 5345 { 5346 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5347 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5348 unsigned long flags; 5349 5350 spin_lock_irqsave(&adapter->state_lock, flags); 5351 if (adapter->state == VNIC_RESETTING) { 5352 spin_unlock_irqrestore(&adapter->state_lock, flags); 5353 return -EBUSY; 5354 } 5355 5356 adapter->state = VNIC_REMOVING; 5357 spin_unlock_irqrestore(&adapter->state_lock, flags); 5358 5359 flush_work(&adapter->ibmvnic_reset); 5360 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5361 5362 rtnl_lock(); 5363 unregister_netdevice(netdev); 5364 5365 release_resources(adapter); 5366 release_sub_crqs(adapter, 1); 5367 release_crq_queue(adapter); 5368 5369 release_stats_token(adapter); 5370 release_stats_buffers(adapter); 5371 5372 adapter->state = VNIC_REMOVED; 5373 5374 rtnl_unlock(); 5375 mutex_destroy(&adapter->fw_lock); 5376 device_remove_file(&dev->dev, &dev_attr_failover); 5377 free_netdev(netdev); 5378 dev_set_drvdata(&dev->dev, NULL); 5379 5380 return 0; 5381 } 5382 5383 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5384 const char *buf, size_t count) 5385 { 5386 struct net_device *netdev = dev_get_drvdata(dev); 5387 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5388 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5389 __be64 session_token; 5390 long rc; 5391 5392 if (!sysfs_streq(buf, "1")) 5393 return -EINVAL; 5394 5395 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5396 H_GET_SESSION_TOKEN, 0, 0, 0); 5397 if (rc) { 5398 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5399 rc); 5400 return -EINVAL; 5401 } 5402 5403 session_token = (__be64)retbuf[0]; 5404 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5405 be64_to_cpu(session_token)); 5406 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5407 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5408 if (rc) { 5409 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5410 rc); 5411 return -EINVAL; 5412 } 5413 5414 return count; 5415 } 5416 5417 static DEVICE_ATTR_WO(failover); 5418 5419 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5420 { 5421 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5422 struct ibmvnic_adapter *adapter; 5423 struct iommu_table *tbl; 5424 unsigned long ret = 0; 5425 int i; 5426 5427 tbl = get_iommu_table_base(&vdev->dev); 5428 5429 /* netdev inits at probe time along with the structures we need below*/ 5430 if (!netdev) 5431 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5432 5433 adapter = netdev_priv(netdev); 5434 5435 ret += PAGE_SIZE; /* the crq message queue */ 5436 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5437 5438 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5439 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5440 5441 for (i = 0; i < adapter->num_active_rx_pools; i++) 5442 ret += adapter->rx_pool[i].size * 5443 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5444 5445 return ret; 5446 } 5447 5448 static int ibmvnic_resume(struct device *dev) 5449 { 5450 struct net_device *netdev = dev_get_drvdata(dev); 5451 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5452 5453 if (adapter->state != VNIC_OPEN) 5454 return 0; 5455 5456 tasklet_schedule(&adapter->tasklet); 5457 5458 return 0; 5459 } 5460 5461 static const struct vio_device_id ibmvnic_device_table[] = { 5462 {"network", "IBM,vnic"}, 5463 {"", "" } 5464 }; 5465 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5466 5467 static const struct dev_pm_ops ibmvnic_pm_ops = { 5468 .resume = ibmvnic_resume 5469 }; 5470 5471 static struct vio_driver ibmvnic_driver = { 5472 .id_table = ibmvnic_device_table, 5473 .probe = ibmvnic_probe, 5474 .remove = ibmvnic_remove, 5475 .get_desired_dma = ibmvnic_get_desired_dma, 5476 .name = ibmvnic_driver_name, 5477 .pm = &ibmvnic_pm_ops, 5478 }; 5479 5480 /* module functions */ 5481 static int __init ibmvnic_module_init(void) 5482 { 5483 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5484 IBMVNIC_DRIVER_VERSION); 5485 5486 return vio_register_driver(&ibmvnic_driver); 5487 } 5488 5489 static void __exit ibmvnic_module_exit(void) 5490 { 5491 vio_unregister_driver(&ibmvnic_driver); 5492 } 5493 5494 module_init(ibmvnic_module_init); 5495 module_exit(ibmvnic_module_exit); 5496