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 void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 110 struct ibmvnic_sub_crq_queue *tx_scrq); 111 112 struct ibmvnic_stat { 113 char name[ETH_GSTRING_LEN]; 114 int offset; 115 }; 116 117 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 118 offsetof(struct ibmvnic_statistics, stat)) 119 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 120 121 static const struct ibmvnic_stat ibmvnic_stats[] = { 122 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 123 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 124 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 125 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 126 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 127 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 128 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 129 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 130 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 131 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 132 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 133 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 134 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 135 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 136 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 137 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 138 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 139 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 140 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 141 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 142 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 143 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 144 }; 145 146 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 147 { 148 union ibmvnic_crq crq; 149 150 memset(&crq, 0, sizeof(crq)); 151 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 152 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 153 154 return ibmvnic_send_crq(adapter, &crq); 155 } 156 157 static int send_version_xchg(struct ibmvnic_adapter *adapter) 158 { 159 union ibmvnic_crq crq; 160 161 memset(&crq, 0, sizeof(crq)); 162 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 163 crq.version_exchange.cmd = VERSION_EXCHANGE; 164 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 165 166 return ibmvnic_send_crq(adapter, &crq); 167 } 168 169 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 170 unsigned long length, unsigned long *number, 171 unsigned long *irq) 172 { 173 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 174 long rc; 175 176 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 177 *number = retbuf[0]; 178 *irq = retbuf[1]; 179 180 return rc; 181 } 182 183 /** 184 * ibmvnic_wait_for_completion - Check device state and wait for completion 185 * @adapter: private device data 186 * @comp_done: completion structure to wait for 187 * @timeout: time to wait in milliseconds 188 * 189 * Wait for a completion signal or until the timeout limit is reached 190 * while checking that the device is still active. 191 */ 192 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 193 struct completion *comp_done, 194 unsigned long timeout) 195 { 196 struct net_device *netdev; 197 unsigned long div_timeout; 198 u8 retry; 199 200 netdev = adapter->netdev; 201 retry = 5; 202 div_timeout = msecs_to_jiffies(timeout / retry); 203 while (true) { 204 if (!adapter->crq.active) { 205 netdev_err(netdev, "Device down!\n"); 206 return -ENODEV; 207 } 208 if (!retry--) 209 break; 210 if (wait_for_completion_timeout(comp_done, div_timeout)) 211 return 0; 212 } 213 netdev_err(netdev, "Operation timed out.\n"); 214 return -ETIMEDOUT; 215 } 216 217 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 218 struct ibmvnic_long_term_buff *ltb, int size) 219 { 220 struct device *dev = &adapter->vdev->dev; 221 int rc; 222 223 ltb->size = size; 224 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 225 GFP_KERNEL); 226 227 if (!ltb->buff) { 228 dev_err(dev, "Couldn't alloc long term buffer\n"); 229 return -ENOMEM; 230 } 231 ltb->map_id = adapter->map_id; 232 adapter->map_id++; 233 234 mutex_lock(&adapter->fw_lock); 235 adapter->fw_done_rc = 0; 236 reinit_completion(&adapter->fw_done); 237 238 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 239 if (rc) { 240 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 241 goto out; 242 } 243 244 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 245 if (rc) { 246 dev_err(dev, 247 "Long term map request aborted or timed out,rc = %d\n", 248 rc); 249 goto out; 250 } 251 252 if (adapter->fw_done_rc) { 253 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 254 adapter->fw_done_rc); 255 rc = -1; 256 goto out; 257 } 258 rc = 0; 259 out: 260 if (rc) { 261 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 262 ltb->buff = NULL; 263 } 264 mutex_unlock(&adapter->fw_lock); 265 return rc; 266 } 267 268 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 269 struct ibmvnic_long_term_buff *ltb) 270 { 271 struct device *dev = &adapter->vdev->dev; 272 273 if (!ltb->buff) 274 return; 275 276 /* VIOS automatically unmaps the long term buffer at remote 277 * end for the following resets: 278 * FAILOVER, MOBILITY, TIMEOUT. 279 */ 280 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 281 adapter->reset_reason != VNIC_RESET_MOBILITY && 282 adapter->reset_reason != VNIC_RESET_TIMEOUT) 283 send_request_unmap(adapter, ltb->map_id); 284 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 285 ltb->buff = NULL; 286 ltb->map_id = 0; 287 } 288 289 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 290 struct ibmvnic_long_term_buff *ltb) 291 { 292 struct device *dev = &adapter->vdev->dev; 293 int rc; 294 295 memset(ltb->buff, 0, ltb->size); 296 297 mutex_lock(&adapter->fw_lock); 298 adapter->fw_done_rc = 0; 299 300 reinit_completion(&adapter->fw_done); 301 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 302 if (rc) { 303 mutex_unlock(&adapter->fw_lock); 304 return rc; 305 } 306 307 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 308 if (rc) { 309 dev_info(dev, 310 "Reset failed, long term map request timed out or aborted\n"); 311 mutex_unlock(&adapter->fw_lock); 312 return rc; 313 } 314 315 if (adapter->fw_done_rc) { 316 dev_info(dev, 317 "Reset failed, attempting to free and reallocate buffer\n"); 318 free_long_term_buff(adapter, ltb); 319 mutex_unlock(&adapter->fw_lock); 320 return alloc_long_term_buff(adapter, ltb, ltb->size); 321 } 322 mutex_unlock(&adapter->fw_lock); 323 return 0; 324 } 325 326 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 327 { 328 int i; 329 330 for (i = 0; i < adapter->num_active_rx_pools; i++) 331 adapter->rx_pool[i].active = 0; 332 } 333 334 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 335 struct ibmvnic_rx_pool *pool) 336 { 337 int count = pool->size - atomic_read(&pool->available); 338 u64 handle = adapter->rx_scrq[pool->index]->handle; 339 struct device *dev = &adapter->vdev->dev; 340 struct ibmvnic_ind_xmit_queue *ind_bufp; 341 struct ibmvnic_sub_crq_queue *rx_scrq; 342 union sub_crq *sub_crq; 343 int buffers_added = 0; 344 unsigned long lpar_rc; 345 struct sk_buff *skb; 346 unsigned int offset; 347 dma_addr_t dma_addr; 348 unsigned char *dst; 349 int shift = 0; 350 int index; 351 int i; 352 353 if (!pool->active) 354 return; 355 356 rx_scrq = adapter->rx_scrq[pool->index]; 357 ind_bufp = &rx_scrq->ind_buf; 358 359 /* netdev_skb_alloc() could have failed after we saved a few skbs 360 * in the indir_buf and we would not have sent them to VIOS yet. 361 * To account for them, start the loop at ind_bufp->index rather 362 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 363 * be 0. 364 */ 365 for (i = ind_bufp->index; i < count; ++i) { 366 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 367 if (!skb) { 368 dev_err(dev, "Couldn't replenish rx buff\n"); 369 adapter->replenish_no_mem++; 370 break; 371 } 372 373 index = pool->free_map[pool->next_free]; 374 375 if (pool->rx_buff[index].skb) 376 dev_err(dev, "Inconsistent free_map!\n"); 377 378 /* Copy the skb to the long term mapped DMA buffer */ 379 offset = index * pool->buff_size; 380 dst = pool->long_term_buff.buff + offset; 381 memset(dst, 0, pool->buff_size); 382 dma_addr = pool->long_term_buff.addr + offset; 383 pool->rx_buff[index].data = dst; 384 385 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 386 pool->rx_buff[index].dma = dma_addr; 387 pool->rx_buff[index].skb = skb; 388 pool->rx_buff[index].pool_index = pool->index; 389 pool->rx_buff[index].size = pool->buff_size; 390 391 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 392 memset(sub_crq, 0, sizeof(*sub_crq)); 393 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 394 sub_crq->rx_add.correlator = 395 cpu_to_be64((u64)&pool->rx_buff[index]); 396 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 397 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 398 399 /* The length field of the sCRQ is defined to be 24 bits so the 400 * buffer size needs to be left shifted by a byte before it is 401 * converted to big endian to prevent the last byte from being 402 * truncated. 403 */ 404 #ifdef __LITTLE_ENDIAN__ 405 shift = 8; 406 #endif 407 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 408 pool->next_free = (pool->next_free + 1) % pool->size; 409 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 410 i == count - 1) { 411 lpar_rc = 412 send_subcrq_indirect(adapter, handle, 413 (u64)ind_bufp->indir_dma, 414 (u64)ind_bufp->index); 415 if (lpar_rc != H_SUCCESS) 416 goto failure; 417 buffers_added += ind_bufp->index; 418 adapter->replenish_add_buff_success += ind_bufp->index; 419 ind_bufp->index = 0; 420 } 421 } 422 atomic_add(buffers_added, &pool->available); 423 return; 424 425 failure: 426 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 427 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 428 for (i = ind_bufp->index - 1; i >= 0; --i) { 429 struct ibmvnic_rx_buff *rx_buff; 430 431 pool->next_free = pool->next_free == 0 ? 432 pool->size - 1 : pool->next_free - 1; 433 sub_crq = &ind_bufp->indir_arr[i]; 434 rx_buff = (struct ibmvnic_rx_buff *) 435 be64_to_cpu(sub_crq->rx_add.correlator); 436 index = (int)(rx_buff - pool->rx_buff); 437 pool->free_map[pool->next_free] = index; 438 dev_kfree_skb_any(pool->rx_buff[index].skb); 439 pool->rx_buff[index].skb = NULL; 440 } 441 adapter->replenish_add_buff_failure += ind_bufp->index; 442 atomic_add(buffers_added, &pool->available); 443 ind_bufp->index = 0; 444 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 445 /* Disable buffer pool replenishment and report carrier off if 446 * queue is closed or pending failover. 447 * Firmware guarantees that a signal will be sent to the 448 * driver, triggering a reset. 449 */ 450 deactivate_rx_pools(adapter); 451 netif_carrier_off(adapter->netdev); 452 } 453 } 454 455 static void replenish_pools(struct ibmvnic_adapter *adapter) 456 { 457 int i; 458 459 adapter->replenish_task_cycles++; 460 for (i = 0; i < adapter->num_active_rx_pools; i++) { 461 if (adapter->rx_pool[i].active) 462 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 463 } 464 465 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 466 } 467 468 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 469 { 470 kfree(adapter->tx_stats_buffers); 471 kfree(adapter->rx_stats_buffers); 472 adapter->tx_stats_buffers = NULL; 473 adapter->rx_stats_buffers = NULL; 474 } 475 476 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 477 { 478 adapter->tx_stats_buffers = 479 kcalloc(IBMVNIC_MAX_QUEUES, 480 sizeof(struct ibmvnic_tx_queue_stats), 481 GFP_KERNEL); 482 if (!adapter->tx_stats_buffers) 483 return -ENOMEM; 484 485 adapter->rx_stats_buffers = 486 kcalloc(IBMVNIC_MAX_QUEUES, 487 sizeof(struct ibmvnic_rx_queue_stats), 488 GFP_KERNEL); 489 if (!adapter->rx_stats_buffers) 490 return -ENOMEM; 491 492 return 0; 493 } 494 495 static void release_stats_token(struct ibmvnic_adapter *adapter) 496 { 497 struct device *dev = &adapter->vdev->dev; 498 499 if (!adapter->stats_token) 500 return; 501 502 dma_unmap_single(dev, adapter->stats_token, 503 sizeof(struct ibmvnic_statistics), 504 DMA_FROM_DEVICE); 505 adapter->stats_token = 0; 506 } 507 508 static int init_stats_token(struct ibmvnic_adapter *adapter) 509 { 510 struct device *dev = &adapter->vdev->dev; 511 dma_addr_t stok; 512 513 stok = dma_map_single(dev, &adapter->stats, 514 sizeof(struct ibmvnic_statistics), 515 DMA_FROM_DEVICE); 516 if (dma_mapping_error(dev, stok)) { 517 dev_err(dev, "Couldn't map stats buffer\n"); 518 return -1; 519 } 520 521 adapter->stats_token = stok; 522 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 523 return 0; 524 } 525 526 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 527 { 528 struct ibmvnic_rx_pool *rx_pool; 529 u64 buff_size; 530 int rx_scrqs; 531 int i, j, rc; 532 533 if (!adapter->rx_pool) 534 return -1; 535 536 buff_size = adapter->cur_rx_buf_sz; 537 rx_scrqs = adapter->num_active_rx_pools; 538 for (i = 0; i < rx_scrqs; i++) { 539 rx_pool = &adapter->rx_pool[i]; 540 541 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 542 543 if (rx_pool->buff_size != buff_size) { 544 free_long_term_buff(adapter, &rx_pool->long_term_buff); 545 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 546 rc = alloc_long_term_buff(adapter, 547 &rx_pool->long_term_buff, 548 rx_pool->size * 549 rx_pool->buff_size); 550 } else { 551 rc = reset_long_term_buff(adapter, 552 &rx_pool->long_term_buff); 553 } 554 555 if (rc) 556 return rc; 557 558 for (j = 0; j < rx_pool->size; j++) 559 rx_pool->free_map[j] = j; 560 561 memset(rx_pool->rx_buff, 0, 562 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 563 564 atomic_set(&rx_pool->available, 0); 565 rx_pool->next_alloc = 0; 566 rx_pool->next_free = 0; 567 rx_pool->active = 1; 568 } 569 570 return 0; 571 } 572 573 static void release_rx_pools(struct ibmvnic_adapter *adapter) 574 { 575 struct ibmvnic_rx_pool *rx_pool; 576 int i, j; 577 578 if (!adapter->rx_pool) 579 return; 580 581 for (i = 0; i < adapter->num_active_rx_pools; i++) { 582 rx_pool = &adapter->rx_pool[i]; 583 584 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 585 586 kfree(rx_pool->free_map); 587 free_long_term_buff(adapter, &rx_pool->long_term_buff); 588 589 if (!rx_pool->rx_buff) 590 continue; 591 592 for (j = 0; j < rx_pool->size; j++) { 593 if (rx_pool->rx_buff[j].skb) { 594 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 595 rx_pool->rx_buff[j].skb = NULL; 596 } 597 } 598 599 kfree(rx_pool->rx_buff); 600 } 601 602 kfree(adapter->rx_pool); 603 adapter->rx_pool = NULL; 604 adapter->num_active_rx_pools = 0; 605 } 606 607 static int init_rx_pools(struct net_device *netdev) 608 { 609 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 610 struct device *dev = &adapter->vdev->dev; 611 struct ibmvnic_rx_pool *rx_pool; 612 int rxadd_subcrqs; 613 u64 buff_size; 614 int i, j; 615 616 rxadd_subcrqs = adapter->num_active_rx_scrqs; 617 buff_size = adapter->cur_rx_buf_sz; 618 619 adapter->rx_pool = kcalloc(rxadd_subcrqs, 620 sizeof(struct ibmvnic_rx_pool), 621 GFP_KERNEL); 622 if (!adapter->rx_pool) { 623 dev_err(dev, "Failed to allocate rx pools\n"); 624 return -1; 625 } 626 627 adapter->num_active_rx_pools = rxadd_subcrqs; 628 629 for (i = 0; i < rxadd_subcrqs; i++) { 630 rx_pool = &adapter->rx_pool[i]; 631 632 netdev_dbg(adapter->netdev, 633 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 634 i, adapter->req_rx_add_entries_per_subcrq, 635 buff_size); 636 637 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 638 rx_pool->index = i; 639 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 640 rx_pool->active = 1; 641 642 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 643 GFP_KERNEL); 644 if (!rx_pool->free_map) { 645 release_rx_pools(adapter); 646 return -1; 647 } 648 649 rx_pool->rx_buff = kcalloc(rx_pool->size, 650 sizeof(struct ibmvnic_rx_buff), 651 GFP_KERNEL); 652 if (!rx_pool->rx_buff) { 653 dev_err(dev, "Couldn't alloc rx buffers\n"); 654 release_rx_pools(adapter); 655 return -1; 656 } 657 658 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 659 rx_pool->size * rx_pool->buff_size)) { 660 release_rx_pools(adapter); 661 return -1; 662 } 663 664 for (j = 0; j < rx_pool->size; ++j) 665 rx_pool->free_map[j] = j; 666 667 atomic_set(&rx_pool->available, 0); 668 rx_pool->next_alloc = 0; 669 rx_pool->next_free = 0; 670 } 671 672 return 0; 673 } 674 675 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 676 struct ibmvnic_tx_pool *tx_pool) 677 { 678 int rc, i; 679 680 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 681 if (rc) 682 return rc; 683 684 memset(tx_pool->tx_buff, 0, 685 tx_pool->num_buffers * 686 sizeof(struct ibmvnic_tx_buff)); 687 688 for (i = 0; i < tx_pool->num_buffers; i++) 689 tx_pool->free_map[i] = i; 690 691 tx_pool->consumer_index = 0; 692 tx_pool->producer_index = 0; 693 694 return 0; 695 } 696 697 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 698 { 699 int tx_scrqs; 700 int i, rc; 701 702 if (!adapter->tx_pool) 703 return -1; 704 705 tx_scrqs = adapter->num_active_tx_pools; 706 for (i = 0; i < tx_scrqs; i++) { 707 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 708 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 709 if (rc) 710 return rc; 711 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 712 if (rc) 713 return rc; 714 } 715 716 return 0; 717 } 718 719 static void release_vpd_data(struct ibmvnic_adapter *adapter) 720 { 721 if (!adapter->vpd) 722 return; 723 724 kfree(adapter->vpd->buff); 725 kfree(adapter->vpd); 726 727 adapter->vpd = NULL; 728 } 729 730 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 731 struct ibmvnic_tx_pool *tx_pool) 732 { 733 kfree(tx_pool->tx_buff); 734 kfree(tx_pool->free_map); 735 free_long_term_buff(adapter, &tx_pool->long_term_buff); 736 } 737 738 static void release_tx_pools(struct ibmvnic_adapter *adapter) 739 { 740 int i; 741 742 if (!adapter->tx_pool) 743 return; 744 745 for (i = 0; i < adapter->num_active_tx_pools; i++) { 746 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 747 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 748 } 749 750 kfree(adapter->tx_pool); 751 adapter->tx_pool = NULL; 752 kfree(adapter->tso_pool); 753 adapter->tso_pool = NULL; 754 adapter->num_active_tx_pools = 0; 755 } 756 757 static int init_one_tx_pool(struct net_device *netdev, 758 struct ibmvnic_tx_pool *tx_pool, 759 int num_entries, int buf_size) 760 { 761 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 762 int i; 763 764 tx_pool->tx_buff = kcalloc(num_entries, 765 sizeof(struct ibmvnic_tx_buff), 766 GFP_KERNEL); 767 if (!tx_pool->tx_buff) 768 return -1; 769 770 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 771 num_entries * buf_size)) 772 return -1; 773 774 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 775 if (!tx_pool->free_map) 776 return -1; 777 778 for (i = 0; i < num_entries; i++) 779 tx_pool->free_map[i] = i; 780 781 tx_pool->consumer_index = 0; 782 tx_pool->producer_index = 0; 783 tx_pool->num_buffers = num_entries; 784 tx_pool->buf_size = buf_size; 785 786 return 0; 787 } 788 789 static int init_tx_pools(struct net_device *netdev) 790 { 791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 792 int tx_subcrqs; 793 u64 buff_size; 794 int i, rc; 795 796 tx_subcrqs = adapter->num_active_tx_scrqs; 797 adapter->tx_pool = kcalloc(tx_subcrqs, 798 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 799 if (!adapter->tx_pool) 800 return -1; 801 802 adapter->tso_pool = kcalloc(tx_subcrqs, 803 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 804 if (!adapter->tso_pool) { 805 kfree(adapter->tx_pool); 806 adapter->tx_pool = NULL; 807 return -1; 808 } 809 810 adapter->num_active_tx_pools = tx_subcrqs; 811 812 for (i = 0; i < tx_subcrqs; i++) { 813 buff_size = adapter->req_mtu + VLAN_HLEN; 814 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 815 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 816 adapter->req_tx_entries_per_subcrq, 817 buff_size); 818 if (rc) { 819 release_tx_pools(adapter); 820 return rc; 821 } 822 823 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 824 IBMVNIC_TSO_BUFS, 825 IBMVNIC_TSO_BUF_SZ); 826 if (rc) { 827 release_tx_pools(adapter); 828 return rc; 829 } 830 } 831 832 return 0; 833 } 834 835 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 836 { 837 int i; 838 839 if (adapter->napi_enabled) 840 return; 841 842 for (i = 0; i < adapter->req_rx_queues; i++) 843 napi_enable(&adapter->napi[i]); 844 845 adapter->napi_enabled = true; 846 } 847 848 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 849 { 850 int i; 851 852 if (!adapter->napi_enabled) 853 return; 854 855 for (i = 0; i < adapter->req_rx_queues; i++) { 856 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 857 napi_disable(&adapter->napi[i]); 858 } 859 860 adapter->napi_enabled = false; 861 } 862 863 static int init_napi(struct ibmvnic_adapter *adapter) 864 { 865 int i; 866 867 adapter->napi = kcalloc(adapter->req_rx_queues, 868 sizeof(struct napi_struct), GFP_KERNEL); 869 if (!adapter->napi) 870 return -ENOMEM; 871 872 for (i = 0; i < adapter->req_rx_queues; i++) { 873 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 874 netif_napi_add(adapter->netdev, &adapter->napi[i], 875 ibmvnic_poll, NAPI_POLL_WEIGHT); 876 } 877 878 adapter->num_active_rx_napi = adapter->req_rx_queues; 879 return 0; 880 } 881 882 static void release_napi(struct ibmvnic_adapter *adapter) 883 { 884 int i; 885 886 if (!adapter->napi) 887 return; 888 889 for (i = 0; i < adapter->num_active_rx_napi; i++) { 890 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 891 netif_napi_del(&adapter->napi[i]); 892 } 893 894 kfree(adapter->napi); 895 adapter->napi = NULL; 896 adapter->num_active_rx_napi = 0; 897 adapter->napi_enabled = false; 898 } 899 900 static const char *adapter_state_to_string(enum vnic_state state) 901 { 902 switch (state) { 903 case VNIC_PROBING: 904 return "PROBING"; 905 case VNIC_PROBED: 906 return "PROBED"; 907 case VNIC_OPENING: 908 return "OPENING"; 909 case VNIC_OPEN: 910 return "OPEN"; 911 case VNIC_CLOSING: 912 return "CLOSING"; 913 case VNIC_CLOSED: 914 return "CLOSED"; 915 case VNIC_REMOVING: 916 return "REMOVING"; 917 case VNIC_REMOVED: 918 return "REMOVED"; 919 case VNIC_DOWN: 920 return "DOWN"; 921 } 922 return "UNKNOWN"; 923 } 924 925 static int ibmvnic_login(struct net_device *netdev) 926 { 927 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 928 unsigned long timeout = msecs_to_jiffies(20000); 929 int retry_count = 0; 930 int retries = 10; 931 bool retry; 932 int rc; 933 934 do { 935 retry = false; 936 if (retry_count > retries) { 937 netdev_warn(netdev, "Login attempts exceeded\n"); 938 return -1; 939 } 940 941 adapter->init_done_rc = 0; 942 reinit_completion(&adapter->init_done); 943 rc = send_login(adapter); 944 if (rc) 945 return rc; 946 947 if (!wait_for_completion_timeout(&adapter->init_done, 948 timeout)) { 949 netdev_warn(netdev, "Login timed out, retrying...\n"); 950 retry = true; 951 adapter->init_done_rc = 0; 952 retry_count++; 953 continue; 954 } 955 956 if (adapter->init_done_rc == ABORTED) { 957 netdev_warn(netdev, "Login aborted, retrying...\n"); 958 retry = true; 959 adapter->init_done_rc = 0; 960 retry_count++; 961 /* FW or device may be busy, so 962 * wait a bit before retrying login 963 */ 964 msleep(500); 965 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 966 retry_count++; 967 release_sub_crqs(adapter, 1); 968 969 retry = true; 970 netdev_dbg(netdev, 971 "Received partial success, retrying...\n"); 972 adapter->init_done_rc = 0; 973 reinit_completion(&adapter->init_done); 974 send_query_cap(adapter); 975 if (!wait_for_completion_timeout(&adapter->init_done, 976 timeout)) { 977 netdev_warn(netdev, 978 "Capabilities query timed out\n"); 979 return -1; 980 } 981 982 rc = init_sub_crqs(adapter); 983 if (rc) { 984 netdev_warn(netdev, 985 "SCRQ initialization failed\n"); 986 return -1; 987 } 988 989 rc = init_sub_crq_irqs(adapter); 990 if (rc) { 991 netdev_warn(netdev, 992 "SCRQ irq initialization failed\n"); 993 return -1; 994 } 995 } else if (adapter->init_done_rc) { 996 netdev_warn(netdev, "Adapter login failed\n"); 997 return -1; 998 } 999 } while (retry); 1000 1001 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1002 1003 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1004 return 0; 1005 } 1006 1007 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1008 { 1009 kfree(adapter->login_buf); 1010 adapter->login_buf = NULL; 1011 } 1012 1013 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1014 { 1015 kfree(adapter->login_rsp_buf); 1016 adapter->login_rsp_buf = NULL; 1017 } 1018 1019 static void release_resources(struct ibmvnic_adapter *adapter) 1020 { 1021 release_vpd_data(adapter); 1022 1023 release_tx_pools(adapter); 1024 release_rx_pools(adapter); 1025 1026 release_napi(adapter); 1027 release_login_buffer(adapter); 1028 release_login_rsp_buffer(adapter); 1029 } 1030 1031 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1032 { 1033 struct net_device *netdev = adapter->netdev; 1034 unsigned long timeout = msecs_to_jiffies(20000); 1035 union ibmvnic_crq crq; 1036 bool resend; 1037 int rc; 1038 1039 netdev_dbg(netdev, "setting link state %d\n", link_state); 1040 1041 memset(&crq, 0, sizeof(crq)); 1042 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1043 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1044 crq.logical_link_state.link_state = link_state; 1045 1046 do { 1047 resend = false; 1048 1049 reinit_completion(&adapter->init_done); 1050 rc = ibmvnic_send_crq(adapter, &crq); 1051 if (rc) { 1052 netdev_err(netdev, "Failed to set link state\n"); 1053 return rc; 1054 } 1055 1056 if (!wait_for_completion_timeout(&adapter->init_done, 1057 timeout)) { 1058 netdev_err(netdev, "timeout setting link state\n"); 1059 return -1; 1060 } 1061 1062 if (adapter->init_done_rc == PARTIALSUCCESS) { 1063 /* Partuial success, delay and re-send */ 1064 mdelay(1000); 1065 resend = true; 1066 } else if (adapter->init_done_rc) { 1067 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1068 adapter->init_done_rc); 1069 return adapter->init_done_rc; 1070 } 1071 } while (resend); 1072 1073 return 0; 1074 } 1075 1076 static int set_real_num_queues(struct net_device *netdev) 1077 { 1078 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1079 int rc; 1080 1081 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1082 adapter->req_tx_queues, adapter->req_rx_queues); 1083 1084 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1085 if (rc) { 1086 netdev_err(netdev, "failed to set the number of tx queues\n"); 1087 return rc; 1088 } 1089 1090 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1091 if (rc) 1092 netdev_err(netdev, "failed to set the number of rx queues\n"); 1093 1094 return rc; 1095 } 1096 1097 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1098 { 1099 struct device *dev = &adapter->vdev->dev; 1100 union ibmvnic_crq crq; 1101 int len = 0; 1102 int rc; 1103 1104 if (adapter->vpd->buff) 1105 len = adapter->vpd->len; 1106 1107 mutex_lock(&adapter->fw_lock); 1108 adapter->fw_done_rc = 0; 1109 reinit_completion(&adapter->fw_done); 1110 1111 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1112 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1113 rc = ibmvnic_send_crq(adapter, &crq); 1114 if (rc) { 1115 mutex_unlock(&adapter->fw_lock); 1116 return rc; 1117 } 1118 1119 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1120 if (rc) { 1121 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1122 mutex_unlock(&adapter->fw_lock); 1123 return rc; 1124 } 1125 mutex_unlock(&adapter->fw_lock); 1126 1127 if (!adapter->vpd->len) 1128 return -ENODATA; 1129 1130 if (!adapter->vpd->buff) 1131 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1132 else if (adapter->vpd->len != len) 1133 adapter->vpd->buff = 1134 krealloc(adapter->vpd->buff, 1135 adapter->vpd->len, GFP_KERNEL); 1136 1137 if (!adapter->vpd->buff) { 1138 dev_err(dev, "Could allocate VPD buffer\n"); 1139 return -ENOMEM; 1140 } 1141 1142 adapter->vpd->dma_addr = 1143 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1144 DMA_FROM_DEVICE); 1145 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1146 dev_err(dev, "Could not map VPD buffer\n"); 1147 kfree(adapter->vpd->buff); 1148 adapter->vpd->buff = NULL; 1149 return -ENOMEM; 1150 } 1151 1152 mutex_lock(&adapter->fw_lock); 1153 adapter->fw_done_rc = 0; 1154 reinit_completion(&adapter->fw_done); 1155 1156 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1157 crq.get_vpd.cmd = GET_VPD; 1158 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1159 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1160 rc = ibmvnic_send_crq(adapter, &crq); 1161 if (rc) { 1162 kfree(adapter->vpd->buff); 1163 adapter->vpd->buff = NULL; 1164 mutex_unlock(&adapter->fw_lock); 1165 return rc; 1166 } 1167 1168 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1169 if (rc) { 1170 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1171 kfree(adapter->vpd->buff); 1172 adapter->vpd->buff = NULL; 1173 mutex_unlock(&adapter->fw_lock); 1174 return rc; 1175 } 1176 1177 mutex_unlock(&adapter->fw_lock); 1178 return 0; 1179 } 1180 1181 static int init_resources(struct ibmvnic_adapter *adapter) 1182 { 1183 struct net_device *netdev = adapter->netdev; 1184 int rc; 1185 1186 rc = set_real_num_queues(netdev); 1187 if (rc) 1188 return rc; 1189 1190 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1191 if (!adapter->vpd) 1192 return -ENOMEM; 1193 1194 /* Vital Product Data (VPD) */ 1195 rc = ibmvnic_get_vpd(adapter); 1196 if (rc) { 1197 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1198 return rc; 1199 } 1200 1201 adapter->map_id = 1; 1202 1203 rc = init_napi(adapter); 1204 if (rc) 1205 return rc; 1206 1207 send_query_map(adapter); 1208 1209 rc = init_rx_pools(netdev); 1210 if (rc) 1211 return rc; 1212 1213 rc = init_tx_pools(netdev); 1214 return rc; 1215 } 1216 1217 static int __ibmvnic_open(struct net_device *netdev) 1218 { 1219 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1220 enum vnic_state prev_state = adapter->state; 1221 int i, rc; 1222 1223 adapter->state = VNIC_OPENING; 1224 replenish_pools(adapter); 1225 ibmvnic_napi_enable(adapter); 1226 1227 /* We're ready to receive frames, enable the sub-crq interrupts and 1228 * set the logical link state to up 1229 */ 1230 for (i = 0; i < adapter->req_rx_queues; i++) { 1231 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1232 if (prev_state == VNIC_CLOSED) 1233 enable_irq(adapter->rx_scrq[i]->irq); 1234 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1235 } 1236 1237 for (i = 0; i < adapter->req_tx_queues; i++) { 1238 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1239 if (prev_state == VNIC_CLOSED) 1240 enable_irq(adapter->tx_scrq[i]->irq); 1241 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1242 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1243 } 1244 1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1246 if (rc) { 1247 ibmvnic_napi_disable(adapter); 1248 release_resources(adapter); 1249 return rc; 1250 } 1251 1252 netif_tx_start_all_queues(netdev); 1253 1254 if (prev_state == VNIC_CLOSED) { 1255 for (i = 0; i < adapter->req_rx_queues; i++) 1256 napi_schedule(&adapter->napi[i]); 1257 } 1258 1259 adapter->state = VNIC_OPEN; 1260 return rc; 1261 } 1262 1263 static int ibmvnic_open(struct net_device *netdev) 1264 { 1265 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1266 int rc; 1267 1268 ASSERT_RTNL(); 1269 1270 /* If device failover is pending or we are about to reset, just set 1271 * device state and return. Device operation will be handled by reset 1272 * routine. 1273 * 1274 * It should be safe to overwrite the adapter->state here. Since 1275 * we hold the rtnl, either the reset has not actually started or 1276 * the rtnl got dropped during the set_link_state() in do_reset(). 1277 * In the former case, no one else is changing the state (again we 1278 * have the rtnl) and in the latter case, do_reset() will detect and 1279 * honor our setting below. 1280 */ 1281 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1282 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1283 adapter_state_to_string(adapter->state), 1284 adapter->failover_pending); 1285 adapter->state = VNIC_OPEN; 1286 rc = 0; 1287 goto out; 1288 } 1289 1290 if (adapter->state != VNIC_CLOSED) { 1291 rc = ibmvnic_login(netdev); 1292 if (rc) 1293 goto out; 1294 1295 rc = init_resources(adapter); 1296 if (rc) { 1297 netdev_err(netdev, "failed to initialize resources\n"); 1298 release_resources(adapter); 1299 goto out; 1300 } 1301 } 1302 1303 rc = __ibmvnic_open(netdev); 1304 1305 out: 1306 /* If open failed and there is a pending failover or in-progress reset, 1307 * set device state and return. Device operation will be handled by 1308 * reset routine. See also comments above regarding rtnl. 1309 */ 1310 if (rc && 1311 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1312 adapter->state = VNIC_OPEN; 1313 rc = 0; 1314 } 1315 return rc; 1316 } 1317 1318 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1319 { 1320 struct ibmvnic_rx_pool *rx_pool; 1321 struct ibmvnic_rx_buff *rx_buff; 1322 u64 rx_entries; 1323 int rx_scrqs; 1324 int i, j; 1325 1326 if (!adapter->rx_pool) 1327 return; 1328 1329 rx_scrqs = adapter->num_active_rx_pools; 1330 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1331 1332 /* Free any remaining skbs in the rx buffer pools */ 1333 for (i = 0; i < rx_scrqs; i++) { 1334 rx_pool = &adapter->rx_pool[i]; 1335 if (!rx_pool || !rx_pool->rx_buff) 1336 continue; 1337 1338 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1339 for (j = 0; j < rx_entries; j++) { 1340 rx_buff = &rx_pool->rx_buff[j]; 1341 if (rx_buff && rx_buff->skb) { 1342 dev_kfree_skb_any(rx_buff->skb); 1343 rx_buff->skb = NULL; 1344 } 1345 } 1346 } 1347 } 1348 1349 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1350 struct ibmvnic_tx_pool *tx_pool) 1351 { 1352 struct ibmvnic_tx_buff *tx_buff; 1353 u64 tx_entries; 1354 int i; 1355 1356 if (!tx_pool || !tx_pool->tx_buff) 1357 return; 1358 1359 tx_entries = tx_pool->num_buffers; 1360 1361 for (i = 0; i < tx_entries; i++) { 1362 tx_buff = &tx_pool->tx_buff[i]; 1363 if (tx_buff && tx_buff->skb) { 1364 dev_kfree_skb_any(tx_buff->skb); 1365 tx_buff->skb = NULL; 1366 } 1367 } 1368 } 1369 1370 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1371 { 1372 int tx_scrqs; 1373 int i; 1374 1375 if (!adapter->tx_pool || !adapter->tso_pool) 1376 return; 1377 1378 tx_scrqs = adapter->num_active_tx_pools; 1379 1380 /* Free any remaining skbs in the tx buffer pools */ 1381 for (i = 0; i < tx_scrqs; i++) { 1382 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1383 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1384 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1385 } 1386 } 1387 1388 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1389 { 1390 struct net_device *netdev = adapter->netdev; 1391 int i; 1392 1393 if (adapter->tx_scrq) { 1394 for (i = 0; i < adapter->req_tx_queues; i++) 1395 if (adapter->tx_scrq[i]->irq) { 1396 netdev_dbg(netdev, 1397 "Disabling tx_scrq[%d] irq\n", i); 1398 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1399 disable_irq(adapter->tx_scrq[i]->irq); 1400 } 1401 } 1402 1403 if (adapter->rx_scrq) { 1404 for (i = 0; i < adapter->req_rx_queues; i++) { 1405 if (adapter->rx_scrq[i]->irq) { 1406 netdev_dbg(netdev, 1407 "Disabling rx_scrq[%d] irq\n", i); 1408 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1409 disable_irq(adapter->rx_scrq[i]->irq); 1410 } 1411 } 1412 } 1413 } 1414 1415 static void ibmvnic_cleanup(struct net_device *netdev) 1416 { 1417 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1418 1419 /* ensure that transmissions are stopped if called by do_reset */ 1420 if (test_bit(0, &adapter->resetting)) 1421 netif_tx_disable(netdev); 1422 else 1423 netif_tx_stop_all_queues(netdev); 1424 1425 ibmvnic_napi_disable(adapter); 1426 ibmvnic_disable_irqs(adapter); 1427 1428 clean_rx_pools(adapter); 1429 clean_tx_pools(adapter); 1430 } 1431 1432 static int __ibmvnic_close(struct net_device *netdev) 1433 { 1434 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1435 int rc = 0; 1436 1437 adapter->state = VNIC_CLOSING; 1438 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1439 adapter->state = VNIC_CLOSED; 1440 return rc; 1441 } 1442 1443 static int ibmvnic_close(struct net_device *netdev) 1444 { 1445 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1446 int rc; 1447 1448 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1449 adapter_state_to_string(adapter->state), 1450 adapter->failover_pending, 1451 adapter->force_reset_recovery); 1452 1453 /* If device failover is pending, just set device state and return. 1454 * Device operation will be handled by reset routine. 1455 */ 1456 if (adapter->failover_pending) { 1457 adapter->state = VNIC_CLOSED; 1458 return 0; 1459 } 1460 1461 rc = __ibmvnic_close(netdev); 1462 ibmvnic_cleanup(netdev); 1463 1464 return rc; 1465 } 1466 1467 /** 1468 * build_hdr_data - creates L2/L3/L4 header data buffer 1469 * @hdr_field: bitfield determining needed headers 1470 * @skb: socket buffer 1471 * @hdr_len: array of header lengths 1472 * @hdr_data: buffer to write the header to 1473 * 1474 * Reads hdr_field to determine which headers are needed by firmware. 1475 * Builds a buffer containing these headers. Saves individual header 1476 * lengths and total buffer length to be used to build descriptors. 1477 */ 1478 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1479 int *hdr_len, u8 *hdr_data) 1480 { 1481 int len = 0; 1482 u8 *hdr; 1483 1484 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1485 hdr_len[0] = sizeof(struct vlan_ethhdr); 1486 else 1487 hdr_len[0] = sizeof(struct ethhdr); 1488 1489 if (skb->protocol == htons(ETH_P_IP)) { 1490 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1491 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1492 hdr_len[2] = tcp_hdrlen(skb); 1493 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1494 hdr_len[2] = sizeof(struct udphdr); 1495 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1496 hdr_len[1] = sizeof(struct ipv6hdr); 1497 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1498 hdr_len[2] = tcp_hdrlen(skb); 1499 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1500 hdr_len[2] = sizeof(struct udphdr); 1501 } else if (skb->protocol == htons(ETH_P_ARP)) { 1502 hdr_len[1] = arp_hdr_len(skb->dev); 1503 hdr_len[2] = 0; 1504 } 1505 1506 memset(hdr_data, 0, 120); 1507 if ((hdr_field >> 6) & 1) { 1508 hdr = skb_mac_header(skb); 1509 memcpy(hdr_data, hdr, hdr_len[0]); 1510 len += hdr_len[0]; 1511 } 1512 1513 if ((hdr_field >> 5) & 1) { 1514 hdr = skb_network_header(skb); 1515 memcpy(hdr_data + len, hdr, hdr_len[1]); 1516 len += hdr_len[1]; 1517 } 1518 1519 if ((hdr_field >> 4) & 1) { 1520 hdr = skb_transport_header(skb); 1521 memcpy(hdr_data + len, hdr, hdr_len[2]); 1522 len += hdr_len[2]; 1523 } 1524 return len; 1525 } 1526 1527 /** 1528 * create_hdr_descs - create header and header extension descriptors 1529 * @hdr_field: bitfield determining needed headers 1530 * @hdr_data: buffer containing header data 1531 * @len: length of data buffer 1532 * @hdr_len: array of individual header lengths 1533 * @scrq_arr: descriptor array 1534 * 1535 * Creates header and, if needed, header extension descriptors and 1536 * places them in a descriptor array, scrq_arr 1537 */ 1538 1539 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1540 union sub_crq *scrq_arr) 1541 { 1542 union sub_crq hdr_desc; 1543 int tmp_len = len; 1544 int num_descs = 0; 1545 u8 *data, *cur; 1546 int tmp; 1547 1548 while (tmp_len > 0) { 1549 cur = hdr_data + len - tmp_len; 1550 1551 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1552 if (cur != hdr_data) { 1553 data = hdr_desc.hdr_ext.data; 1554 tmp = tmp_len > 29 ? 29 : tmp_len; 1555 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1556 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1557 hdr_desc.hdr_ext.len = tmp; 1558 } else { 1559 data = hdr_desc.hdr.data; 1560 tmp = tmp_len > 24 ? 24 : tmp_len; 1561 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1562 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1563 hdr_desc.hdr.len = tmp; 1564 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1565 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1566 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1567 hdr_desc.hdr.flag = hdr_field << 1; 1568 } 1569 memcpy(data, cur, tmp); 1570 tmp_len -= tmp; 1571 *scrq_arr = hdr_desc; 1572 scrq_arr++; 1573 num_descs++; 1574 } 1575 1576 return num_descs; 1577 } 1578 1579 /** 1580 * build_hdr_descs_arr - build a header descriptor array 1581 * @skb: tx socket buffer 1582 * @indir_arr: indirect array 1583 * @num_entries: number of descriptors to be sent 1584 * @hdr_field: bit field determining which headers will be sent 1585 * 1586 * This function will build a TX descriptor array with applicable 1587 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1588 */ 1589 1590 static void build_hdr_descs_arr(struct sk_buff *skb, 1591 union sub_crq *indir_arr, 1592 int *num_entries, u8 hdr_field) 1593 { 1594 int hdr_len[3] = {0, 0, 0}; 1595 u8 hdr_data[140] = {0}; 1596 int tot_len; 1597 1598 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1599 hdr_data); 1600 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1601 indir_arr + 1); 1602 } 1603 1604 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1605 struct net_device *netdev) 1606 { 1607 /* For some backing devices, mishandling of small packets 1608 * can result in a loss of connection or TX stall. Device 1609 * architects recommend that no packet should be smaller 1610 * than the minimum MTU value provided to the driver, so 1611 * pad any packets to that length 1612 */ 1613 if (skb->len < netdev->min_mtu) 1614 return skb_put_padto(skb, netdev->min_mtu); 1615 1616 return 0; 1617 } 1618 1619 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1620 struct ibmvnic_sub_crq_queue *tx_scrq) 1621 { 1622 struct ibmvnic_ind_xmit_queue *ind_bufp; 1623 struct ibmvnic_tx_buff *tx_buff; 1624 struct ibmvnic_tx_pool *tx_pool; 1625 union sub_crq tx_scrq_entry; 1626 int queue_num; 1627 int entries; 1628 int index; 1629 int i; 1630 1631 ind_bufp = &tx_scrq->ind_buf; 1632 entries = (u64)ind_bufp->index; 1633 queue_num = tx_scrq->pool_index; 1634 1635 for (i = entries - 1; i >= 0; --i) { 1636 tx_scrq_entry = ind_bufp->indir_arr[i]; 1637 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1638 continue; 1639 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1640 if (index & IBMVNIC_TSO_POOL_MASK) { 1641 tx_pool = &adapter->tso_pool[queue_num]; 1642 index &= ~IBMVNIC_TSO_POOL_MASK; 1643 } else { 1644 tx_pool = &adapter->tx_pool[queue_num]; 1645 } 1646 tx_pool->free_map[tx_pool->consumer_index] = index; 1647 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1648 tx_pool->num_buffers - 1 : 1649 tx_pool->consumer_index - 1; 1650 tx_buff = &tx_pool->tx_buff[index]; 1651 adapter->netdev->stats.tx_packets--; 1652 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1653 adapter->tx_stats_buffers[queue_num].packets--; 1654 adapter->tx_stats_buffers[queue_num].bytes -= 1655 tx_buff->skb->len; 1656 dev_kfree_skb_any(tx_buff->skb); 1657 tx_buff->skb = NULL; 1658 adapter->netdev->stats.tx_dropped++; 1659 } 1660 ind_bufp->index = 0; 1661 if (atomic_sub_return(entries, &tx_scrq->used) <= 1662 (adapter->req_tx_entries_per_subcrq / 2) && 1663 __netif_subqueue_stopped(adapter->netdev, queue_num) && 1664 !test_bit(0, &adapter->resetting)) { 1665 netif_wake_subqueue(adapter->netdev, queue_num); 1666 netdev_dbg(adapter->netdev, "Started queue %d\n", 1667 queue_num); 1668 } 1669 } 1670 1671 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1672 struct ibmvnic_sub_crq_queue *tx_scrq) 1673 { 1674 struct ibmvnic_ind_xmit_queue *ind_bufp; 1675 u64 dma_addr; 1676 u64 entries; 1677 u64 handle; 1678 int rc; 1679 1680 ind_bufp = &tx_scrq->ind_buf; 1681 dma_addr = (u64)ind_bufp->indir_dma; 1682 entries = (u64)ind_bufp->index; 1683 handle = tx_scrq->handle; 1684 1685 if (!entries) 1686 return 0; 1687 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1688 if (rc) 1689 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1690 else 1691 ind_bufp->index = 0; 1692 return 0; 1693 } 1694 1695 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1696 { 1697 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1698 int queue_num = skb_get_queue_mapping(skb); 1699 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1700 struct device *dev = &adapter->vdev->dev; 1701 struct ibmvnic_ind_xmit_queue *ind_bufp; 1702 struct ibmvnic_tx_buff *tx_buff = NULL; 1703 struct ibmvnic_sub_crq_queue *tx_scrq; 1704 struct ibmvnic_tx_pool *tx_pool; 1705 unsigned int tx_send_failed = 0; 1706 netdev_tx_t ret = NETDEV_TX_OK; 1707 unsigned int tx_map_failed = 0; 1708 union sub_crq indir_arr[16]; 1709 unsigned int tx_dropped = 0; 1710 unsigned int tx_packets = 0; 1711 unsigned int tx_bytes = 0; 1712 dma_addr_t data_dma_addr; 1713 struct netdev_queue *txq; 1714 unsigned long lpar_rc; 1715 union sub_crq tx_crq; 1716 unsigned int offset; 1717 int num_entries = 1; 1718 unsigned char *dst; 1719 int index = 0; 1720 u8 proto = 0; 1721 1722 tx_scrq = adapter->tx_scrq[queue_num]; 1723 txq = netdev_get_tx_queue(netdev, queue_num); 1724 ind_bufp = &tx_scrq->ind_buf; 1725 1726 if (test_bit(0, &adapter->resetting)) { 1727 if (!netif_subqueue_stopped(netdev, skb)) 1728 netif_stop_subqueue(netdev, queue_num); 1729 dev_kfree_skb_any(skb); 1730 1731 tx_send_failed++; 1732 tx_dropped++; 1733 ret = NETDEV_TX_OK; 1734 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1735 goto out; 1736 } 1737 1738 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1739 tx_dropped++; 1740 tx_send_failed++; 1741 ret = NETDEV_TX_OK; 1742 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1743 goto out; 1744 } 1745 if (skb_is_gso(skb)) 1746 tx_pool = &adapter->tso_pool[queue_num]; 1747 else 1748 tx_pool = &adapter->tx_pool[queue_num]; 1749 1750 index = tx_pool->free_map[tx_pool->consumer_index]; 1751 1752 if (index == IBMVNIC_INVALID_MAP) { 1753 dev_kfree_skb_any(skb); 1754 tx_send_failed++; 1755 tx_dropped++; 1756 ret = NETDEV_TX_OK; 1757 goto out; 1758 } 1759 1760 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1761 1762 offset = index * tx_pool->buf_size; 1763 dst = tx_pool->long_term_buff.buff + offset; 1764 memset(dst, 0, tx_pool->buf_size); 1765 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1766 1767 if (skb_shinfo(skb)->nr_frags) { 1768 int cur, i; 1769 1770 /* Copy the head */ 1771 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1772 cur = skb_headlen(skb); 1773 1774 /* Copy the frags */ 1775 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1776 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1777 1778 memcpy(dst + cur, skb_frag_address(frag), 1779 skb_frag_size(frag)); 1780 cur += skb_frag_size(frag); 1781 } 1782 } else { 1783 skb_copy_from_linear_data(skb, dst, skb->len); 1784 } 1785 1786 /* post changes to long_term_buff *dst before VIOS accessing it */ 1787 dma_wmb(); 1788 1789 tx_pool->consumer_index = 1790 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1791 1792 tx_buff = &tx_pool->tx_buff[index]; 1793 tx_buff->skb = skb; 1794 tx_buff->index = index; 1795 tx_buff->pool_index = queue_num; 1796 1797 memset(&tx_crq, 0, sizeof(tx_crq)); 1798 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1799 tx_crq.v1.type = IBMVNIC_TX_DESC; 1800 tx_crq.v1.n_crq_elem = 1; 1801 tx_crq.v1.n_sge = 1; 1802 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1803 1804 if (skb_is_gso(skb)) 1805 tx_crq.v1.correlator = 1806 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1807 else 1808 tx_crq.v1.correlator = cpu_to_be32(index); 1809 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1810 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1811 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1812 1813 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1814 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1815 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1816 } 1817 1818 if (skb->protocol == htons(ETH_P_IP)) { 1819 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1820 proto = ip_hdr(skb)->protocol; 1821 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1822 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1823 proto = ipv6_hdr(skb)->nexthdr; 1824 } 1825 1826 if (proto == IPPROTO_TCP) 1827 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1828 else if (proto == IPPROTO_UDP) 1829 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1830 1831 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1832 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1833 hdrs += 2; 1834 } 1835 if (skb_is_gso(skb)) { 1836 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1837 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1838 hdrs += 2; 1839 } 1840 1841 if ((*hdrs >> 7) & 1) 1842 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1843 1844 tx_crq.v1.n_crq_elem = num_entries; 1845 tx_buff->num_entries = num_entries; 1846 /* flush buffer if current entry can not fit */ 1847 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1848 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1849 if (lpar_rc != H_SUCCESS) 1850 goto tx_flush_err; 1851 } 1852 1853 indir_arr[0] = tx_crq; 1854 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1855 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1856 ind_bufp->index += num_entries; 1857 if (__netdev_tx_sent_queue(txq, skb->len, 1858 netdev_xmit_more() && 1859 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1860 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1861 if (lpar_rc != H_SUCCESS) 1862 goto tx_err; 1863 } 1864 1865 if (atomic_add_return(num_entries, &tx_scrq->used) 1866 >= adapter->req_tx_entries_per_subcrq) { 1867 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1868 netif_stop_subqueue(netdev, queue_num); 1869 } 1870 1871 tx_packets++; 1872 tx_bytes += skb->len; 1873 txq->trans_start = jiffies; 1874 ret = NETDEV_TX_OK; 1875 goto out; 1876 1877 tx_flush_err: 1878 dev_kfree_skb_any(skb); 1879 tx_buff->skb = NULL; 1880 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1881 tx_pool->num_buffers - 1 : 1882 tx_pool->consumer_index - 1; 1883 tx_dropped++; 1884 tx_err: 1885 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1886 dev_err_ratelimited(dev, "tx: send failed\n"); 1887 1888 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1889 /* Disable TX and report carrier off if queue is closed 1890 * or pending failover. 1891 * Firmware guarantees that a signal will be sent to the 1892 * driver, triggering a reset or some other action. 1893 */ 1894 netif_tx_stop_all_queues(netdev); 1895 netif_carrier_off(netdev); 1896 } 1897 out: 1898 netdev->stats.tx_dropped += tx_dropped; 1899 netdev->stats.tx_bytes += tx_bytes; 1900 netdev->stats.tx_packets += tx_packets; 1901 adapter->tx_send_failed += tx_send_failed; 1902 adapter->tx_map_failed += tx_map_failed; 1903 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1904 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1905 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1906 1907 return ret; 1908 } 1909 1910 static void ibmvnic_set_multi(struct net_device *netdev) 1911 { 1912 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1913 struct netdev_hw_addr *ha; 1914 union ibmvnic_crq crq; 1915 1916 memset(&crq, 0, sizeof(crq)); 1917 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1918 crq.request_capability.cmd = REQUEST_CAPABILITY; 1919 1920 if (netdev->flags & IFF_PROMISC) { 1921 if (!adapter->promisc_supported) 1922 return; 1923 } else { 1924 if (netdev->flags & IFF_ALLMULTI) { 1925 /* Accept all multicast */ 1926 memset(&crq, 0, sizeof(crq)); 1927 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1928 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1929 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1930 ibmvnic_send_crq(adapter, &crq); 1931 } else if (netdev_mc_empty(netdev)) { 1932 /* Reject all multicast */ 1933 memset(&crq, 0, sizeof(crq)); 1934 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1935 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1936 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1937 ibmvnic_send_crq(adapter, &crq); 1938 } else { 1939 /* Accept one or more multicast(s) */ 1940 netdev_for_each_mc_addr(ha, netdev) { 1941 memset(&crq, 0, sizeof(crq)); 1942 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1943 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1944 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1945 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1946 ha->addr); 1947 ibmvnic_send_crq(adapter, &crq); 1948 } 1949 } 1950 } 1951 } 1952 1953 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1954 { 1955 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1956 union ibmvnic_crq crq; 1957 int rc; 1958 1959 if (!is_valid_ether_addr(dev_addr)) { 1960 rc = -EADDRNOTAVAIL; 1961 goto err; 1962 } 1963 1964 memset(&crq, 0, sizeof(crq)); 1965 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1966 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1967 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1968 1969 mutex_lock(&adapter->fw_lock); 1970 adapter->fw_done_rc = 0; 1971 reinit_completion(&adapter->fw_done); 1972 1973 rc = ibmvnic_send_crq(adapter, &crq); 1974 if (rc) { 1975 rc = -EIO; 1976 mutex_unlock(&adapter->fw_lock); 1977 goto err; 1978 } 1979 1980 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1981 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1982 if (rc || adapter->fw_done_rc) { 1983 rc = -EIO; 1984 mutex_unlock(&adapter->fw_lock); 1985 goto err; 1986 } 1987 mutex_unlock(&adapter->fw_lock); 1988 return 0; 1989 err: 1990 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1991 return rc; 1992 } 1993 1994 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1995 { 1996 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1997 struct sockaddr *addr = p; 1998 int rc; 1999 2000 rc = 0; 2001 if (!is_valid_ether_addr(addr->sa_data)) 2002 return -EADDRNOTAVAIL; 2003 2004 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2005 if (adapter->state != VNIC_PROBED) 2006 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2007 2008 return rc; 2009 } 2010 2011 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2012 { 2013 switch (reason) { 2014 case VNIC_RESET_FAILOVER: 2015 return "FAILOVER"; 2016 case VNIC_RESET_MOBILITY: 2017 return "MOBILITY"; 2018 case VNIC_RESET_FATAL: 2019 return "FATAL"; 2020 case VNIC_RESET_NON_FATAL: 2021 return "NON_FATAL"; 2022 case VNIC_RESET_TIMEOUT: 2023 return "TIMEOUT"; 2024 case VNIC_RESET_CHANGE_PARAM: 2025 return "CHANGE_PARAM"; 2026 case VNIC_RESET_PASSIVE_INIT: 2027 return "PASSIVE_INIT"; 2028 } 2029 return "UNKNOWN"; 2030 } 2031 2032 /* 2033 * do_reset returns zero if we are able to keep processing reset events, or 2034 * non-zero if we hit a fatal error and must halt. 2035 */ 2036 static int do_reset(struct ibmvnic_adapter *adapter, 2037 struct ibmvnic_rwi *rwi, u32 reset_state) 2038 { 2039 u64 old_num_rx_queues, old_num_tx_queues; 2040 u64 old_num_rx_slots, old_num_tx_slots; 2041 struct net_device *netdev = adapter->netdev; 2042 int rc; 2043 2044 netdev_dbg(adapter->netdev, 2045 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2046 adapter_state_to_string(adapter->state), 2047 adapter->failover_pending, 2048 reset_reason_to_string(rwi->reset_reason), 2049 adapter_state_to_string(reset_state)); 2050 2051 adapter->reset_reason = rwi->reset_reason; 2052 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2053 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2054 rtnl_lock(); 2055 2056 /* Now that we have the rtnl lock, clear any pending failover. 2057 * This will ensure ibmvnic_open() has either completed or will 2058 * block until failover is complete. 2059 */ 2060 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2061 adapter->failover_pending = false; 2062 2063 /* read the state and check (again) after getting rtnl */ 2064 reset_state = adapter->state; 2065 2066 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2067 rc = -EBUSY; 2068 goto out; 2069 } 2070 2071 netif_carrier_off(netdev); 2072 2073 old_num_rx_queues = adapter->req_rx_queues; 2074 old_num_tx_queues = adapter->req_tx_queues; 2075 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2076 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2077 2078 ibmvnic_cleanup(netdev); 2079 2080 if (reset_state == VNIC_OPEN && 2081 adapter->reset_reason != VNIC_RESET_MOBILITY && 2082 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2083 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2084 rc = __ibmvnic_close(netdev); 2085 if (rc) 2086 goto out; 2087 } else { 2088 adapter->state = VNIC_CLOSING; 2089 2090 /* Release the RTNL lock before link state change and 2091 * re-acquire after the link state change to allow 2092 * linkwatch_event to grab the RTNL lock and run during 2093 * a reset. 2094 */ 2095 rtnl_unlock(); 2096 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2097 rtnl_lock(); 2098 if (rc) 2099 goto out; 2100 2101 if (adapter->state == VNIC_OPEN) { 2102 /* When we dropped rtnl, ibmvnic_open() got 2103 * it and noticed that we are resetting and 2104 * set the adapter state to OPEN. Update our 2105 * new "target" state, and resume the reset 2106 * from VNIC_CLOSING state. 2107 */ 2108 netdev_dbg(netdev, 2109 "Open changed state from %s, updating.\n", 2110 adapter_state_to_string(reset_state)); 2111 reset_state = VNIC_OPEN; 2112 adapter->state = VNIC_CLOSING; 2113 } 2114 2115 if (adapter->state != VNIC_CLOSING) { 2116 /* If someone else changed the adapter state 2117 * when we dropped the rtnl, fail the reset 2118 */ 2119 rc = -1; 2120 goto out; 2121 } 2122 adapter->state = VNIC_CLOSED; 2123 } 2124 } 2125 2126 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2127 release_resources(adapter); 2128 release_sub_crqs(adapter, 1); 2129 release_crq_queue(adapter); 2130 } 2131 2132 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2133 /* remove the closed state so when we call open it appears 2134 * we are coming from the probed state. 2135 */ 2136 adapter->state = VNIC_PROBED; 2137 2138 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2139 rc = init_crq_queue(adapter); 2140 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2141 rc = ibmvnic_reenable_crq_queue(adapter); 2142 release_sub_crqs(adapter, 1); 2143 } else { 2144 rc = ibmvnic_reset_crq(adapter); 2145 if (rc == H_CLOSED || rc == H_SUCCESS) { 2146 rc = vio_enable_interrupts(adapter->vdev); 2147 if (rc) 2148 netdev_err(adapter->netdev, 2149 "Reset failed to enable interrupts. rc=%d\n", 2150 rc); 2151 } 2152 } 2153 2154 if (rc) { 2155 netdev_err(adapter->netdev, 2156 "Reset couldn't initialize crq. rc=%d\n", rc); 2157 goto out; 2158 } 2159 2160 rc = ibmvnic_reset_init(adapter, true); 2161 if (rc) { 2162 rc = IBMVNIC_INIT_FAILED; 2163 goto out; 2164 } 2165 2166 /* If the adapter was in PROBE or DOWN state prior to the reset, 2167 * exit here. 2168 */ 2169 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2170 rc = 0; 2171 goto out; 2172 } 2173 2174 rc = ibmvnic_login(netdev); 2175 if (rc) 2176 goto out; 2177 2178 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2179 rc = init_resources(adapter); 2180 if (rc) 2181 goto out; 2182 } else if (adapter->req_rx_queues != old_num_rx_queues || 2183 adapter->req_tx_queues != old_num_tx_queues || 2184 adapter->req_rx_add_entries_per_subcrq != 2185 old_num_rx_slots || 2186 adapter->req_tx_entries_per_subcrq != 2187 old_num_tx_slots || 2188 !adapter->rx_pool || 2189 !adapter->tso_pool || 2190 !adapter->tx_pool) { 2191 release_rx_pools(adapter); 2192 release_tx_pools(adapter); 2193 release_napi(adapter); 2194 release_vpd_data(adapter); 2195 2196 rc = init_resources(adapter); 2197 if (rc) 2198 goto out; 2199 2200 } else { 2201 rc = reset_tx_pools(adapter); 2202 if (rc) { 2203 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2204 rc); 2205 goto out; 2206 } 2207 2208 rc = reset_rx_pools(adapter); 2209 if (rc) { 2210 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2211 rc); 2212 goto out; 2213 } 2214 } 2215 ibmvnic_disable_irqs(adapter); 2216 } 2217 adapter->state = VNIC_CLOSED; 2218 2219 if (reset_state == VNIC_CLOSED) { 2220 rc = 0; 2221 goto out; 2222 } 2223 2224 rc = __ibmvnic_open(netdev); 2225 if (rc) { 2226 rc = IBMVNIC_OPEN_FAILED; 2227 goto out; 2228 } 2229 2230 /* refresh device's multicast list */ 2231 ibmvnic_set_multi(netdev); 2232 2233 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2234 adapter->reset_reason == VNIC_RESET_MOBILITY) 2235 __netdev_notify_peers(netdev); 2236 2237 rc = 0; 2238 2239 out: 2240 /* restore the adapter state if reset failed */ 2241 if (rc) 2242 adapter->state = reset_state; 2243 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2244 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2245 rtnl_unlock(); 2246 2247 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2248 adapter_state_to_string(adapter->state), 2249 adapter->failover_pending, rc); 2250 return rc; 2251 } 2252 2253 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2254 struct ibmvnic_rwi *rwi, u32 reset_state) 2255 { 2256 struct net_device *netdev = adapter->netdev; 2257 int rc; 2258 2259 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2260 reset_reason_to_string(rwi->reset_reason)); 2261 2262 /* read the state and check (again) after getting rtnl */ 2263 reset_state = adapter->state; 2264 2265 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2266 rc = -EBUSY; 2267 goto out; 2268 } 2269 2270 netif_carrier_off(netdev); 2271 adapter->reset_reason = rwi->reset_reason; 2272 2273 ibmvnic_cleanup(netdev); 2274 release_resources(adapter); 2275 release_sub_crqs(adapter, 0); 2276 release_crq_queue(adapter); 2277 2278 /* remove the closed state so when we call open it appears 2279 * we are coming from the probed state. 2280 */ 2281 adapter->state = VNIC_PROBED; 2282 2283 reinit_completion(&adapter->init_done); 2284 rc = init_crq_queue(adapter); 2285 if (rc) { 2286 netdev_err(adapter->netdev, 2287 "Couldn't initialize crq. rc=%d\n", rc); 2288 goto out; 2289 } 2290 2291 rc = ibmvnic_reset_init(adapter, false); 2292 if (rc) 2293 goto out; 2294 2295 /* If the adapter was in PROBE or DOWN state prior to the reset, 2296 * exit here. 2297 */ 2298 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2299 goto out; 2300 2301 rc = ibmvnic_login(netdev); 2302 if (rc) 2303 goto out; 2304 2305 rc = init_resources(adapter); 2306 if (rc) 2307 goto out; 2308 2309 ibmvnic_disable_irqs(adapter); 2310 adapter->state = VNIC_CLOSED; 2311 2312 if (reset_state == VNIC_CLOSED) 2313 goto out; 2314 2315 rc = __ibmvnic_open(netdev); 2316 if (rc) { 2317 rc = IBMVNIC_OPEN_FAILED; 2318 goto out; 2319 } 2320 2321 __netdev_notify_peers(netdev); 2322 out: 2323 /* restore adapter state if reset failed */ 2324 if (rc) 2325 adapter->state = reset_state; 2326 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2327 adapter_state_to_string(adapter->state), 2328 adapter->failover_pending, rc); 2329 return rc; 2330 } 2331 2332 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2333 { 2334 struct ibmvnic_rwi *rwi; 2335 unsigned long flags; 2336 2337 spin_lock_irqsave(&adapter->rwi_lock, flags); 2338 2339 if (!list_empty(&adapter->rwi_list)) { 2340 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2341 list); 2342 list_del(&rwi->list); 2343 } else { 2344 rwi = NULL; 2345 } 2346 2347 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2348 return rwi; 2349 } 2350 2351 /** 2352 * do_passive_init - complete probing when partner device is detected. 2353 * @adapter: ibmvnic_adapter struct 2354 * 2355 * If the ibmvnic device does not have a partner device to communicate with at boot 2356 * and that partner device comes online at a later time, this function is called 2357 * to complete the initialization process of ibmvnic device. 2358 * Caller is expected to hold rtnl_lock(). 2359 * 2360 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2361 * in the down state. 2362 * Returns 0 upon success and the device is in PROBED state. 2363 */ 2364 2365 static int do_passive_init(struct ibmvnic_adapter *adapter) 2366 { 2367 unsigned long timeout = msecs_to_jiffies(30000); 2368 struct net_device *netdev = adapter->netdev; 2369 struct device *dev = &adapter->vdev->dev; 2370 int rc; 2371 2372 netdev_dbg(netdev, "Partner device found, probing.\n"); 2373 2374 adapter->state = VNIC_PROBING; 2375 reinit_completion(&adapter->init_done); 2376 adapter->init_done_rc = 0; 2377 adapter->crq.active = true; 2378 2379 rc = send_crq_init_complete(adapter); 2380 if (rc) 2381 goto out; 2382 2383 rc = send_version_xchg(adapter); 2384 if (rc) 2385 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2386 2387 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2388 dev_err(dev, "Initialization sequence timed out\n"); 2389 rc = -ETIMEDOUT; 2390 goto out; 2391 } 2392 2393 rc = init_sub_crqs(adapter); 2394 if (rc) { 2395 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2396 goto out; 2397 } 2398 2399 rc = init_sub_crq_irqs(adapter); 2400 if (rc) { 2401 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2402 goto init_failed; 2403 } 2404 2405 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2406 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2407 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2408 2409 adapter->state = VNIC_PROBED; 2410 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2411 2412 return 0; 2413 2414 init_failed: 2415 release_sub_crqs(adapter, 1); 2416 out: 2417 adapter->state = VNIC_DOWN; 2418 return rc; 2419 } 2420 2421 static void __ibmvnic_reset(struct work_struct *work) 2422 { 2423 struct ibmvnic_rwi *rwi; 2424 struct ibmvnic_adapter *adapter; 2425 bool saved_state = false; 2426 unsigned long flags; 2427 u32 reset_state; 2428 int rc = 0; 2429 2430 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2431 2432 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2433 queue_delayed_work(system_long_wq, 2434 &adapter->ibmvnic_delayed_reset, 2435 IBMVNIC_RESET_DELAY); 2436 return; 2437 } 2438 2439 rwi = get_next_rwi(adapter); 2440 while (rwi) { 2441 spin_lock_irqsave(&adapter->state_lock, flags); 2442 2443 if (adapter->state == VNIC_REMOVING || 2444 adapter->state == VNIC_REMOVED) { 2445 spin_unlock_irqrestore(&adapter->state_lock, flags); 2446 kfree(rwi); 2447 rc = EBUSY; 2448 break; 2449 } 2450 2451 if (!saved_state) { 2452 reset_state = adapter->state; 2453 saved_state = true; 2454 } 2455 spin_unlock_irqrestore(&adapter->state_lock, flags); 2456 2457 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2458 rtnl_lock(); 2459 rc = do_passive_init(adapter); 2460 rtnl_unlock(); 2461 if (!rc) 2462 netif_carrier_on(adapter->netdev); 2463 } else if (adapter->force_reset_recovery) { 2464 /* Since we are doing a hard reset now, clear the 2465 * failover_pending flag so we don't ignore any 2466 * future MOBILITY or other resets. 2467 */ 2468 adapter->failover_pending = false; 2469 2470 /* Transport event occurred during previous reset */ 2471 if (adapter->wait_for_reset) { 2472 /* Previous was CHANGE_PARAM; caller locked */ 2473 adapter->force_reset_recovery = false; 2474 rc = do_hard_reset(adapter, rwi, reset_state); 2475 } else { 2476 rtnl_lock(); 2477 adapter->force_reset_recovery = false; 2478 rc = do_hard_reset(adapter, rwi, reset_state); 2479 rtnl_unlock(); 2480 } 2481 if (rc) { 2482 /* give backing device time to settle down */ 2483 netdev_dbg(adapter->netdev, 2484 "[S:%s] Hard reset failed, waiting 60 secs\n", 2485 adapter_state_to_string(adapter->state)); 2486 set_current_state(TASK_UNINTERRUPTIBLE); 2487 schedule_timeout(60 * HZ); 2488 } 2489 } else { 2490 rc = do_reset(adapter, rwi, reset_state); 2491 } 2492 kfree(rwi); 2493 adapter->last_reset_time = jiffies; 2494 2495 if (rc) 2496 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2497 2498 rwi = get_next_rwi(adapter); 2499 2500 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2501 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2502 adapter->force_reset_recovery = true; 2503 } 2504 2505 if (adapter->wait_for_reset) { 2506 adapter->reset_done_rc = rc; 2507 complete(&adapter->reset_done); 2508 } 2509 2510 clear_bit_unlock(0, &adapter->resetting); 2511 2512 netdev_dbg(adapter->netdev, 2513 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2514 adapter_state_to_string(adapter->state), 2515 adapter->force_reset_recovery, 2516 adapter->wait_for_reset); 2517 } 2518 2519 static void __ibmvnic_delayed_reset(struct work_struct *work) 2520 { 2521 struct ibmvnic_adapter *adapter; 2522 2523 adapter = container_of(work, struct ibmvnic_adapter, 2524 ibmvnic_delayed_reset.work); 2525 __ibmvnic_reset(&adapter->ibmvnic_reset); 2526 } 2527 2528 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2529 enum ibmvnic_reset_reason reason) 2530 { 2531 struct list_head *entry, *tmp_entry; 2532 struct ibmvnic_rwi *rwi, *tmp; 2533 struct net_device *netdev = adapter->netdev; 2534 unsigned long flags; 2535 int ret; 2536 2537 spin_lock_irqsave(&adapter->rwi_lock, flags); 2538 2539 /* If failover is pending don't schedule any other reset. 2540 * Instead let the failover complete. If there is already a 2541 * a failover reset scheduled, we will detect and drop the 2542 * duplicate reset when walking the ->rwi_list below. 2543 */ 2544 if (adapter->state == VNIC_REMOVING || 2545 adapter->state == VNIC_REMOVED || 2546 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2547 ret = EBUSY; 2548 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2549 goto err; 2550 } 2551 2552 if (adapter->state == VNIC_PROBING) { 2553 netdev_warn(netdev, "Adapter reset during probe\n"); 2554 adapter->init_done_rc = EAGAIN; 2555 ret = EAGAIN; 2556 goto err; 2557 } 2558 2559 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2560 if (tmp->reset_reason == reason) { 2561 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2562 reset_reason_to_string(reason)); 2563 ret = EBUSY; 2564 goto err; 2565 } 2566 } 2567 2568 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2569 if (!rwi) { 2570 ret = ENOMEM; 2571 goto err; 2572 } 2573 /* if we just received a transport event, 2574 * flush reset queue and process this reset 2575 */ 2576 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2577 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2578 list_del(entry); 2579 } 2580 rwi->reset_reason = reason; 2581 list_add_tail(&rwi->list, &adapter->rwi_list); 2582 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2583 reset_reason_to_string(reason)); 2584 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2585 2586 ret = 0; 2587 err: 2588 /* ibmvnic_close() below can block, so drop the lock first */ 2589 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2590 2591 if (ret == ENOMEM) 2592 ibmvnic_close(netdev); 2593 2594 return -ret; 2595 } 2596 2597 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2598 { 2599 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2600 2601 if (test_bit(0, &adapter->resetting)) { 2602 netdev_err(adapter->netdev, 2603 "Adapter is resetting, skip timeout reset\n"); 2604 return; 2605 } 2606 /* No queuing up reset until at least 5 seconds (default watchdog val) 2607 * after last reset 2608 */ 2609 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2610 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2611 return; 2612 } 2613 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2614 } 2615 2616 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2617 struct ibmvnic_rx_buff *rx_buff) 2618 { 2619 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2620 2621 rx_buff->skb = NULL; 2622 2623 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2624 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2625 2626 atomic_dec(&pool->available); 2627 } 2628 2629 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2630 { 2631 struct ibmvnic_sub_crq_queue *rx_scrq; 2632 struct ibmvnic_adapter *adapter; 2633 struct net_device *netdev; 2634 int frames_processed; 2635 int scrq_num; 2636 2637 netdev = napi->dev; 2638 adapter = netdev_priv(netdev); 2639 scrq_num = (int)(napi - adapter->napi); 2640 frames_processed = 0; 2641 rx_scrq = adapter->rx_scrq[scrq_num]; 2642 2643 restart_poll: 2644 while (frames_processed < budget) { 2645 struct sk_buff *skb; 2646 struct ibmvnic_rx_buff *rx_buff; 2647 union sub_crq *next; 2648 u32 length; 2649 u16 offset; 2650 u8 flags = 0; 2651 2652 if (unlikely(test_bit(0, &adapter->resetting) && 2653 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2654 enable_scrq_irq(adapter, rx_scrq); 2655 napi_complete_done(napi, frames_processed); 2656 return frames_processed; 2657 } 2658 2659 if (!pending_scrq(adapter, rx_scrq)) 2660 break; 2661 next = ibmvnic_next_scrq(adapter, rx_scrq); 2662 rx_buff = (struct ibmvnic_rx_buff *) 2663 be64_to_cpu(next->rx_comp.correlator); 2664 /* do error checking */ 2665 if (next->rx_comp.rc) { 2666 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2667 be16_to_cpu(next->rx_comp.rc)); 2668 /* free the entry */ 2669 next->rx_comp.first = 0; 2670 dev_kfree_skb_any(rx_buff->skb); 2671 remove_buff_from_pool(adapter, rx_buff); 2672 continue; 2673 } else if (!rx_buff->skb) { 2674 /* free the entry */ 2675 next->rx_comp.first = 0; 2676 remove_buff_from_pool(adapter, rx_buff); 2677 continue; 2678 } 2679 2680 length = be32_to_cpu(next->rx_comp.len); 2681 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2682 flags = next->rx_comp.flags; 2683 skb = rx_buff->skb; 2684 /* load long_term_buff before copying to skb */ 2685 dma_rmb(); 2686 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2687 length); 2688 2689 /* VLAN Header has been stripped by the system firmware and 2690 * needs to be inserted by the driver 2691 */ 2692 if (adapter->rx_vlan_header_insertion && 2693 (flags & IBMVNIC_VLAN_STRIPPED)) 2694 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2695 ntohs(next->rx_comp.vlan_tci)); 2696 2697 /* free the entry */ 2698 next->rx_comp.first = 0; 2699 remove_buff_from_pool(adapter, rx_buff); 2700 2701 skb_put(skb, length); 2702 skb->protocol = eth_type_trans(skb, netdev); 2703 skb_record_rx_queue(skb, scrq_num); 2704 2705 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2706 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2707 skb->ip_summed = CHECKSUM_UNNECESSARY; 2708 } 2709 2710 length = skb->len; 2711 napi_gro_receive(napi, skb); /* send it up */ 2712 netdev->stats.rx_packets++; 2713 netdev->stats.rx_bytes += length; 2714 adapter->rx_stats_buffers[scrq_num].packets++; 2715 adapter->rx_stats_buffers[scrq_num].bytes += length; 2716 frames_processed++; 2717 } 2718 2719 if (adapter->state != VNIC_CLOSING && 2720 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2721 adapter->req_rx_add_entries_per_subcrq / 2) || 2722 frames_processed < budget)) 2723 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2724 if (frames_processed < budget) { 2725 if (napi_complete_done(napi, frames_processed)) { 2726 enable_scrq_irq(adapter, rx_scrq); 2727 if (pending_scrq(adapter, rx_scrq)) { 2728 if (napi_reschedule(napi)) { 2729 disable_scrq_irq(adapter, rx_scrq); 2730 goto restart_poll; 2731 } 2732 } 2733 } 2734 } 2735 return frames_processed; 2736 } 2737 2738 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2739 { 2740 int rc, ret; 2741 2742 adapter->fallback.mtu = adapter->req_mtu; 2743 adapter->fallback.rx_queues = adapter->req_rx_queues; 2744 adapter->fallback.tx_queues = adapter->req_tx_queues; 2745 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2746 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2747 2748 reinit_completion(&adapter->reset_done); 2749 adapter->wait_for_reset = true; 2750 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2751 2752 if (rc) { 2753 ret = rc; 2754 goto out; 2755 } 2756 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2757 if (rc) { 2758 ret = -ENODEV; 2759 goto out; 2760 } 2761 2762 ret = 0; 2763 if (adapter->reset_done_rc) { 2764 ret = -EIO; 2765 adapter->desired.mtu = adapter->fallback.mtu; 2766 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2767 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2768 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2769 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2770 2771 reinit_completion(&adapter->reset_done); 2772 adapter->wait_for_reset = true; 2773 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2774 if (rc) { 2775 ret = rc; 2776 goto out; 2777 } 2778 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2779 60000); 2780 if (rc) { 2781 ret = -ENODEV; 2782 goto out; 2783 } 2784 } 2785 out: 2786 adapter->wait_for_reset = false; 2787 2788 return ret; 2789 } 2790 2791 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2792 { 2793 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2794 2795 adapter->desired.mtu = new_mtu + ETH_HLEN; 2796 2797 return wait_for_reset(adapter); 2798 } 2799 2800 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2801 struct net_device *dev, 2802 netdev_features_t features) 2803 { 2804 /* Some backing hardware adapters can not 2805 * handle packets with a MSS less than 224 2806 * or with only one segment. 2807 */ 2808 if (skb_is_gso(skb)) { 2809 if (skb_shinfo(skb)->gso_size < 224 || 2810 skb_shinfo(skb)->gso_segs == 1) 2811 features &= ~NETIF_F_GSO_MASK; 2812 } 2813 2814 return features; 2815 } 2816 2817 static const struct net_device_ops ibmvnic_netdev_ops = { 2818 .ndo_open = ibmvnic_open, 2819 .ndo_stop = ibmvnic_close, 2820 .ndo_start_xmit = ibmvnic_xmit, 2821 .ndo_set_rx_mode = ibmvnic_set_multi, 2822 .ndo_set_mac_address = ibmvnic_set_mac, 2823 .ndo_validate_addr = eth_validate_addr, 2824 .ndo_tx_timeout = ibmvnic_tx_timeout, 2825 .ndo_change_mtu = ibmvnic_change_mtu, 2826 .ndo_features_check = ibmvnic_features_check, 2827 }; 2828 2829 /* ethtool functions */ 2830 2831 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2832 struct ethtool_link_ksettings *cmd) 2833 { 2834 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2835 int rc; 2836 2837 rc = send_query_phys_parms(adapter); 2838 if (rc) { 2839 adapter->speed = SPEED_UNKNOWN; 2840 adapter->duplex = DUPLEX_UNKNOWN; 2841 } 2842 cmd->base.speed = adapter->speed; 2843 cmd->base.duplex = adapter->duplex; 2844 cmd->base.port = PORT_FIBRE; 2845 cmd->base.phy_address = 0; 2846 cmd->base.autoneg = AUTONEG_ENABLE; 2847 2848 return 0; 2849 } 2850 2851 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2852 struct ethtool_drvinfo *info) 2853 { 2854 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2855 2856 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2857 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2858 strscpy(info->fw_version, adapter->fw_version, 2859 sizeof(info->fw_version)); 2860 } 2861 2862 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2863 { 2864 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2865 2866 return adapter->msg_enable; 2867 } 2868 2869 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2870 { 2871 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2872 2873 adapter->msg_enable = data; 2874 } 2875 2876 static u32 ibmvnic_get_link(struct net_device *netdev) 2877 { 2878 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2879 2880 /* Don't need to send a query because we request a logical link up at 2881 * init and then we wait for link state indications 2882 */ 2883 return adapter->logical_link_state; 2884 } 2885 2886 static void ibmvnic_get_ringparam(struct net_device *netdev, 2887 struct ethtool_ringparam *ring) 2888 { 2889 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2890 2891 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2892 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2893 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2894 } else { 2895 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2896 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2897 } 2898 ring->rx_mini_max_pending = 0; 2899 ring->rx_jumbo_max_pending = 0; 2900 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2901 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2902 ring->rx_mini_pending = 0; 2903 ring->rx_jumbo_pending = 0; 2904 } 2905 2906 static int ibmvnic_set_ringparam(struct net_device *netdev, 2907 struct ethtool_ringparam *ring) 2908 { 2909 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2910 int ret; 2911 2912 ret = 0; 2913 adapter->desired.rx_entries = ring->rx_pending; 2914 adapter->desired.tx_entries = ring->tx_pending; 2915 2916 ret = wait_for_reset(adapter); 2917 2918 if (!ret && 2919 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2920 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2921 netdev_info(netdev, 2922 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2923 ring->rx_pending, ring->tx_pending, 2924 adapter->req_rx_add_entries_per_subcrq, 2925 adapter->req_tx_entries_per_subcrq); 2926 return ret; 2927 } 2928 2929 static void ibmvnic_get_channels(struct net_device *netdev, 2930 struct ethtool_channels *channels) 2931 { 2932 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2933 2934 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2935 channels->max_rx = adapter->max_rx_queues; 2936 channels->max_tx = adapter->max_tx_queues; 2937 } else { 2938 channels->max_rx = IBMVNIC_MAX_QUEUES; 2939 channels->max_tx = IBMVNIC_MAX_QUEUES; 2940 } 2941 2942 channels->max_other = 0; 2943 channels->max_combined = 0; 2944 channels->rx_count = adapter->req_rx_queues; 2945 channels->tx_count = adapter->req_tx_queues; 2946 channels->other_count = 0; 2947 channels->combined_count = 0; 2948 } 2949 2950 static int ibmvnic_set_channels(struct net_device *netdev, 2951 struct ethtool_channels *channels) 2952 { 2953 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2954 int ret; 2955 2956 ret = 0; 2957 adapter->desired.rx_queues = channels->rx_count; 2958 adapter->desired.tx_queues = channels->tx_count; 2959 2960 ret = wait_for_reset(adapter); 2961 2962 if (!ret && 2963 (adapter->req_rx_queues != channels->rx_count || 2964 adapter->req_tx_queues != channels->tx_count)) 2965 netdev_info(netdev, 2966 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2967 channels->rx_count, channels->tx_count, 2968 adapter->req_rx_queues, adapter->req_tx_queues); 2969 return ret; 2970 } 2971 2972 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2973 { 2974 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2975 int i; 2976 2977 switch (stringset) { 2978 case ETH_SS_STATS: 2979 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2980 i++, data += ETH_GSTRING_LEN) 2981 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2982 2983 for (i = 0; i < adapter->req_tx_queues; i++) { 2984 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2985 data += ETH_GSTRING_LEN; 2986 2987 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2988 data += ETH_GSTRING_LEN; 2989 2990 snprintf(data, ETH_GSTRING_LEN, 2991 "tx%d_dropped_packets", i); 2992 data += ETH_GSTRING_LEN; 2993 } 2994 2995 for (i = 0; i < adapter->req_rx_queues; i++) { 2996 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2997 data += ETH_GSTRING_LEN; 2998 2999 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3000 data += ETH_GSTRING_LEN; 3001 3002 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3003 data += ETH_GSTRING_LEN; 3004 } 3005 break; 3006 3007 case ETH_SS_PRIV_FLAGS: 3008 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3009 strcpy(data + i * ETH_GSTRING_LEN, 3010 ibmvnic_priv_flags[i]); 3011 break; 3012 default: 3013 return; 3014 } 3015 } 3016 3017 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3018 { 3019 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3020 3021 switch (sset) { 3022 case ETH_SS_STATS: 3023 return ARRAY_SIZE(ibmvnic_stats) + 3024 adapter->req_tx_queues * NUM_TX_STATS + 3025 adapter->req_rx_queues * NUM_RX_STATS; 3026 case ETH_SS_PRIV_FLAGS: 3027 return ARRAY_SIZE(ibmvnic_priv_flags); 3028 default: 3029 return -EOPNOTSUPP; 3030 } 3031 } 3032 3033 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3034 struct ethtool_stats *stats, u64 *data) 3035 { 3036 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3037 union ibmvnic_crq crq; 3038 int i, j; 3039 int rc; 3040 3041 memset(&crq, 0, sizeof(crq)); 3042 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3043 crq.request_statistics.cmd = REQUEST_STATISTICS; 3044 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3045 crq.request_statistics.len = 3046 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3047 3048 /* Wait for data to be written */ 3049 reinit_completion(&adapter->stats_done); 3050 rc = ibmvnic_send_crq(adapter, &crq); 3051 if (rc) 3052 return; 3053 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3054 if (rc) 3055 return; 3056 3057 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3058 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3059 (adapter, ibmvnic_stats[i].offset)); 3060 3061 for (j = 0; j < adapter->req_tx_queues; j++) { 3062 data[i] = adapter->tx_stats_buffers[j].packets; 3063 i++; 3064 data[i] = adapter->tx_stats_buffers[j].bytes; 3065 i++; 3066 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3067 i++; 3068 } 3069 3070 for (j = 0; j < adapter->req_rx_queues; j++) { 3071 data[i] = adapter->rx_stats_buffers[j].packets; 3072 i++; 3073 data[i] = adapter->rx_stats_buffers[j].bytes; 3074 i++; 3075 data[i] = adapter->rx_stats_buffers[j].interrupts; 3076 i++; 3077 } 3078 } 3079 3080 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3081 { 3082 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3083 3084 return adapter->priv_flags; 3085 } 3086 3087 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3088 { 3089 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3090 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3091 3092 if (which_maxes) 3093 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3094 else 3095 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3096 3097 return 0; 3098 } 3099 3100 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3101 .get_drvinfo = ibmvnic_get_drvinfo, 3102 .get_msglevel = ibmvnic_get_msglevel, 3103 .set_msglevel = ibmvnic_set_msglevel, 3104 .get_link = ibmvnic_get_link, 3105 .get_ringparam = ibmvnic_get_ringparam, 3106 .set_ringparam = ibmvnic_set_ringparam, 3107 .get_channels = ibmvnic_get_channels, 3108 .set_channels = ibmvnic_set_channels, 3109 .get_strings = ibmvnic_get_strings, 3110 .get_sset_count = ibmvnic_get_sset_count, 3111 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3112 .get_link_ksettings = ibmvnic_get_link_ksettings, 3113 .get_priv_flags = ibmvnic_get_priv_flags, 3114 .set_priv_flags = ibmvnic_set_priv_flags, 3115 }; 3116 3117 /* Routines for managing CRQs/sCRQs */ 3118 3119 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3120 struct ibmvnic_sub_crq_queue *scrq) 3121 { 3122 int rc; 3123 3124 if (!scrq) { 3125 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3126 return -EINVAL; 3127 } 3128 3129 if (scrq->irq) { 3130 free_irq(scrq->irq, scrq); 3131 irq_dispose_mapping(scrq->irq); 3132 scrq->irq = 0; 3133 } 3134 3135 if (scrq->msgs) { 3136 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3137 atomic_set(&scrq->used, 0); 3138 scrq->cur = 0; 3139 scrq->ind_buf.index = 0; 3140 } else { 3141 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3142 return -EINVAL; 3143 } 3144 3145 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3146 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3147 return rc; 3148 } 3149 3150 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3151 { 3152 int i, rc; 3153 3154 if (!adapter->tx_scrq || !adapter->rx_scrq) 3155 return -EINVAL; 3156 3157 for (i = 0; i < adapter->req_tx_queues; i++) { 3158 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3159 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3160 if (rc) 3161 return rc; 3162 } 3163 3164 for (i = 0; i < adapter->req_rx_queues; i++) { 3165 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3166 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3167 if (rc) 3168 return rc; 3169 } 3170 3171 return rc; 3172 } 3173 3174 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3175 struct ibmvnic_sub_crq_queue *scrq, 3176 bool do_h_free) 3177 { 3178 struct device *dev = &adapter->vdev->dev; 3179 long rc; 3180 3181 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3182 3183 if (do_h_free) { 3184 /* Close the sub-crqs */ 3185 do { 3186 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3187 adapter->vdev->unit_address, 3188 scrq->crq_num); 3189 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3190 3191 if (rc) { 3192 netdev_err(adapter->netdev, 3193 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3194 scrq->crq_num, rc); 3195 } 3196 } 3197 3198 dma_free_coherent(dev, 3199 IBMVNIC_IND_ARR_SZ, 3200 scrq->ind_buf.indir_arr, 3201 scrq->ind_buf.indir_dma); 3202 3203 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3204 DMA_BIDIRECTIONAL); 3205 free_pages((unsigned long)scrq->msgs, 2); 3206 kfree(scrq); 3207 } 3208 3209 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3210 *adapter) 3211 { 3212 struct device *dev = &adapter->vdev->dev; 3213 struct ibmvnic_sub_crq_queue *scrq; 3214 int rc; 3215 3216 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3217 if (!scrq) 3218 return NULL; 3219 3220 scrq->msgs = 3221 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3222 if (!scrq->msgs) { 3223 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3224 goto zero_page_failed; 3225 } 3226 3227 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3228 DMA_BIDIRECTIONAL); 3229 if (dma_mapping_error(dev, scrq->msg_token)) { 3230 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3231 goto map_failed; 3232 } 3233 3234 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3235 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3236 3237 if (rc == H_RESOURCE) 3238 rc = ibmvnic_reset_crq(adapter); 3239 3240 if (rc == H_CLOSED) { 3241 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3242 } else if (rc) { 3243 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3244 goto reg_failed; 3245 } 3246 3247 scrq->adapter = adapter; 3248 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3249 scrq->ind_buf.index = 0; 3250 3251 scrq->ind_buf.indir_arr = 3252 dma_alloc_coherent(dev, 3253 IBMVNIC_IND_ARR_SZ, 3254 &scrq->ind_buf.indir_dma, 3255 GFP_KERNEL); 3256 3257 if (!scrq->ind_buf.indir_arr) 3258 goto indir_failed; 3259 3260 spin_lock_init(&scrq->lock); 3261 3262 netdev_dbg(adapter->netdev, 3263 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3264 scrq->crq_num, scrq->hw_irq, scrq->irq); 3265 3266 return scrq; 3267 3268 indir_failed: 3269 do { 3270 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3271 adapter->vdev->unit_address, 3272 scrq->crq_num); 3273 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3274 reg_failed: 3275 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3276 DMA_BIDIRECTIONAL); 3277 map_failed: 3278 free_pages((unsigned long)scrq->msgs, 2); 3279 zero_page_failed: 3280 kfree(scrq); 3281 3282 return NULL; 3283 } 3284 3285 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3286 { 3287 int i; 3288 3289 if (adapter->tx_scrq) { 3290 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3291 if (!adapter->tx_scrq[i]) 3292 continue; 3293 3294 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3295 i); 3296 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3297 if (adapter->tx_scrq[i]->irq) { 3298 free_irq(adapter->tx_scrq[i]->irq, 3299 adapter->tx_scrq[i]); 3300 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3301 adapter->tx_scrq[i]->irq = 0; 3302 } 3303 3304 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3305 do_h_free); 3306 } 3307 3308 kfree(adapter->tx_scrq); 3309 adapter->tx_scrq = NULL; 3310 adapter->num_active_tx_scrqs = 0; 3311 } 3312 3313 if (adapter->rx_scrq) { 3314 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3315 if (!adapter->rx_scrq[i]) 3316 continue; 3317 3318 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3319 i); 3320 if (adapter->rx_scrq[i]->irq) { 3321 free_irq(adapter->rx_scrq[i]->irq, 3322 adapter->rx_scrq[i]); 3323 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3324 adapter->rx_scrq[i]->irq = 0; 3325 } 3326 3327 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3328 do_h_free); 3329 } 3330 3331 kfree(adapter->rx_scrq); 3332 adapter->rx_scrq = NULL; 3333 adapter->num_active_rx_scrqs = 0; 3334 } 3335 } 3336 3337 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3338 struct ibmvnic_sub_crq_queue *scrq) 3339 { 3340 struct device *dev = &adapter->vdev->dev; 3341 unsigned long rc; 3342 3343 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3344 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3345 if (rc) 3346 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3347 scrq->hw_irq, rc); 3348 return rc; 3349 } 3350 3351 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3352 struct ibmvnic_sub_crq_queue *scrq) 3353 { 3354 struct device *dev = &adapter->vdev->dev; 3355 unsigned long rc; 3356 3357 if (scrq->hw_irq > 0x100000000ULL) { 3358 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3359 return 1; 3360 } 3361 3362 if (test_bit(0, &adapter->resetting) && 3363 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3364 u64 val = (0xff000000) | scrq->hw_irq; 3365 3366 rc = plpar_hcall_norets(H_EOI, val); 3367 /* H_EOI would fail with rc = H_FUNCTION when running 3368 * in XIVE mode which is expected, but not an error. 3369 */ 3370 if (rc && (rc != H_FUNCTION)) 3371 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3372 val, rc); 3373 } 3374 3375 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3376 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3377 if (rc) 3378 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3379 scrq->hw_irq, rc); 3380 return rc; 3381 } 3382 3383 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3384 struct ibmvnic_sub_crq_queue *scrq) 3385 { 3386 struct device *dev = &adapter->vdev->dev; 3387 struct ibmvnic_tx_pool *tx_pool; 3388 struct ibmvnic_tx_buff *txbuff; 3389 struct netdev_queue *txq; 3390 union sub_crq *next; 3391 int index; 3392 int i; 3393 3394 restart_loop: 3395 while (pending_scrq(adapter, scrq)) { 3396 unsigned int pool = scrq->pool_index; 3397 int num_entries = 0; 3398 int total_bytes = 0; 3399 int num_packets = 0; 3400 3401 next = ibmvnic_next_scrq(adapter, scrq); 3402 for (i = 0; i < next->tx_comp.num_comps; i++) { 3403 index = be32_to_cpu(next->tx_comp.correlators[i]); 3404 if (index & IBMVNIC_TSO_POOL_MASK) { 3405 tx_pool = &adapter->tso_pool[pool]; 3406 index &= ~IBMVNIC_TSO_POOL_MASK; 3407 } else { 3408 tx_pool = &adapter->tx_pool[pool]; 3409 } 3410 3411 txbuff = &tx_pool->tx_buff[index]; 3412 num_packets++; 3413 num_entries += txbuff->num_entries; 3414 if (txbuff->skb) { 3415 total_bytes += txbuff->skb->len; 3416 if (next->tx_comp.rcs[i]) { 3417 dev_err(dev, "tx error %x\n", 3418 next->tx_comp.rcs[i]); 3419 dev_kfree_skb_irq(txbuff->skb); 3420 } else { 3421 dev_consume_skb_irq(txbuff->skb); 3422 } 3423 txbuff->skb = NULL; 3424 } else { 3425 netdev_warn(adapter->netdev, 3426 "TX completion received with NULL socket buffer\n"); 3427 } 3428 tx_pool->free_map[tx_pool->producer_index] = index; 3429 tx_pool->producer_index = 3430 (tx_pool->producer_index + 1) % 3431 tx_pool->num_buffers; 3432 } 3433 /* remove tx_comp scrq*/ 3434 next->tx_comp.first = 0; 3435 3436 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3437 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3438 3439 if (atomic_sub_return(num_entries, &scrq->used) <= 3440 (adapter->req_tx_entries_per_subcrq / 2) && 3441 __netif_subqueue_stopped(adapter->netdev, 3442 scrq->pool_index)) { 3443 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3444 netdev_dbg(adapter->netdev, "Started queue %d\n", 3445 scrq->pool_index); 3446 } 3447 } 3448 3449 enable_scrq_irq(adapter, scrq); 3450 3451 if (pending_scrq(adapter, scrq)) { 3452 disable_scrq_irq(adapter, scrq); 3453 goto restart_loop; 3454 } 3455 3456 return 0; 3457 } 3458 3459 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3460 { 3461 struct ibmvnic_sub_crq_queue *scrq = instance; 3462 struct ibmvnic_adapter *adapter = scrq->adapter; 3463 3464 disable_scrq_irq(adapter, scrq); 3465 ibmvnic_complete_tx(adapter, scrq); 3466 3467 return IRQ_HANDLED; 3468 } 3469 3470 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3471 { 3472 struct ibmvnic_sub_crq_queue *scrq = instance; 3473 struct ibmvnic_adapter *adapter = scrq->adapter; 3474 3475 /* When booting a kdump kernel we can hit pending interrupts 3476 * prior to completing driver initialization. 3477 */ 3478 if (unlikely(adapter->state != VNIC_OPEN)) 3479 return IRQ_NONE; 3480 3481 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3482 3483 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3484 disable_scrq_irq(adapter, scrq); 3485 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3486 } 3487 3488 return IRQ_HANDLED; 3489 } 3490 3491 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3492 { 3493 struct device *dev = &adapter->vdev->dev; 3494 struct ibmvnic_sub_crq_queue *scrq; 3495 int i = 0, j = 0; 3496 int rc = 0; 3497 3498 for (i = 0; i < adapter->req_tx_queues; i++) { 3499 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3500 i); 3501 scrq = adapter->tx_scrq[i]; 3502 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3503 3504 if (!scrq->irq) { 3505 rc = -EINVAL; 3506 dev_err(dev, "Error mapping irq\n"); 3507 goto req_tx_irq_failed; 3508 } 3509 3510 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3511 adapter->vdev->unit_address, i); 3512 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3513 0, scrq->name, scrq); 3514 3515 if (rc) { 3516 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3517 scrq->irq, rc); 3518 irq_dispose_mapping(scrq->irq); 3519 goto req_tx_irq_failed; 3520 } 3521 } 3522 3523 for (i = 0; i < adapter->req_rx_queues; i++) { 3524 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3525 i); 3526 scrq = adapter->rx_scrq[i]; 3527 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3528 if (!scrq->irq) { 3529 rc = -EINVAL; 3530 dev_err(dev, "Error mapping irq\n"); 3531 goto req_rx_irq_failed; 3532 } 3533 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3534 adapter->vdev->unit_address, i); 3535 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3536 0, scrq->name, scrq); 3537 if (rc) { 3538 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3539 scrq->irq, rc); 3540 irq_dispose_mapping(scrq->irq); 3541 goto req_rx_irq_failed; 3542 } 3543 } 3544 return rc; 3545 3546 req_rx_irq_failed: 3547 for (j = 0; j < i; j++) { 3548 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3549 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3550 } 3551 i = adapter->req_tx_queues; 3552 req_tx_irq_failed: 3553 for (j = 0; j < i; j++) { 3554 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3555 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3556 } 3557 release_sub_crqs(adapter, 1); 3558 return rc; 3559 } 3560 3561 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3562 { 3563 struct device *dev = &adapter->vdev->dev; 3564 struct ibmvnic_sub_crq_queue **allqueues; 3565 int registered_queues = 0; 3566 int total_queues; 3567 int more = 0; 3568 int i; 3569 3570 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3571 3572 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3573 if (!allqueues) 3574 return -1; 3575 3576 for (i = 0; i < total_queues; i++) { 3577 allqueues[i] = init_sub_crq_queue(adapter); 3578 if (!allqueues[i]) { 3579 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3580 break; 3581 } 3582 registered_queues++; 3583 } 3584 3585 /* Make sure we were able to register the minimum number of queues */ 3586 if (registered_queues < 3587 adapter->min_tx_queues + adapter->min_rx_queues) { 3588 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3589 goto tx_failed; 3590 } 3591 3592 /* Distribute the failed allocated queues*/ 3593 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3594 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3595 switch (i % 3) { 3596 case 0: 3597 if (adapter->req_rx_queues > adapter->min_rx_queues) 3598 adapter->req_rx_queues--; 3599 else 3600 more++; 3601 break; 3602 case 1: 3603 if (adapter->req_tx_queues > adapter->min_tx_queues) 3604 adapter->req_tx_queues--; 3605 else 3606 more++; 3607 break; 3608 } 3609 } 3610 3611 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3612 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3613 if (!adapter->tx_scrq) 3614 goto tx_failed; 3615 3616 for (i = 0; i < adapter->req_tx_queues; i++) { 3617 adapter->tx_scrq[i] = allqueues[i]; 3618 adapter->tx_scrq[i]->pool_index = i; 3619 adapter->num_active_tx_scrqs++; 3620 } 3621 3622 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3623 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3624 if (!adapter->rx_scrq) 3625 goto rx_failed; 3626 3627 for (i = 0; i < adapter->req_rx_queues; i++) { 3628 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3629 adapter->rx_scrq[i]->scrq_num = i; 3630 adapter->num_active_rx_scrqs++; 3631 } 3632 3633 kfree(allqueues); 3634 return 0; 3635 3636 rx_failed: 3637 kfree(adapter->tx_scrq); 3638 adapter->tx_scrq = NULL; 3639 tx_failed: 3640 for (i = 0; i < registered_queues; i++) 3641 release_sub_crq_queue(adapter, allqueues[i], 1); 3642 kfree(allqueues); 3643 return -1; 3644 } 3645 3646 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3647 { 3648 struct device *dev = &adapter->vdev->dev; 3649 union ibmvnic_crq crq; 3650 int max_entries; 3651 3652 if (!retry) { 3653 /* Sub-CRQ entries are 32 byte long */ 3654 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3655 3656 if (adapter->min_tx_entries_per_subcrq > entries_page || 3657 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3658 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3659 return; 3660 } 3661 3662 if (adapter->desired.mtu) 3663 adapter->req_mtu = adapter->desired.mtu; 3664 else 3665 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3666 3667 if (!adapter->desired.tx_entries) 3668 adapter->desired.tx_entries = 3669 adapter->max_tx_entries_per_subcrq; 3670 if (!adapter->desired.rx_entries) 3671 adapter->desired.rx_entries = 3672 adapter->max_rx_add_entries_per_subcrq; 3673 3674 max_entries = IBMVNIC_MAX_LTB_SIZE / 3675 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3676 3677 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3678 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3679 adapter->desired.tx_entries = max_entries; 3680 } 3681 3682 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3683 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3684 adapter->desired.rx_entries = max_entries; 3685 } 3686 3687 if (adapter->desired.tx_entries) 3688 adapter->req_tx_entries_per_subcrq = 3689 adapter->desired.tx_entries; 3690 else 3691 adapter->req_tx_entries_per_subcrq = 3692 adapter->max_tx_entries_per_subcrq; 3693 3694 if (adapter->desired.rx_entries) 3695 adapter->req_rx_add_entries_per_subcrq = 3696 adapter->desired.rx_entries; 3697 else 3698 adapter->req_rx_add_entries_per_subcrq = 3699 adapter->max_rx_add_entries_per_subcrq; 3700 3701 if (adapter->desired.tx_queues) 3702 adapter->req_tx_queues = 3703 adapter->desired.tx_queues; 3704 else 3705 adapter->req_tx_queues = 3706 adapter->opt_tx_comp_sub_queues; 3707 3708 if (adapter->desired.rx_queues) 3709 adapter->req_rx_queues = 3710 adapter->desired.rx_queues; 3711 else 3712 adapter->req_rx_queues = 3713 adapter->opt_rx_comp_queues; 3714 3715 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3716 } 3717 3718 memset(&crq, 0, sizeof(crq)); 3719 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3720 crq.request_capability.cmd = REQUEST_CAPABILITY; 3721 3722 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3723 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3724 atomic_inc(&adapter->running_cap_crqs); 3725 ibmvnic_send_crq(adapter, &crq); 3726 3727 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3728 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3729 atomic_inc(&adapter->running_cap_crqs); 3730 ibmvnic_send_crq(adapter, &crq); 3731 3732 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3733 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3734 atomic_inc(&adapter->running_cap_crqs); 3735 ibmvnic_send_crq(adapter, &crq); 3736 3737 crq.request_capability.capability = 3738 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3739 crq.request_capability.number = 3740 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3741 atomic_inc(&adapter->running_cap_crqs); 3742 ibmvnic_send_crq(adapter, &crq); 3743 3744 crq.request_capability.capability = 3745 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3746 crq.request_capability.number = 3747 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3748 atomic_inc(&adapter->running_cap_crqs); 3749 ibmvnic_send_crq(adapter, &crq); 3750 3751 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3752 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3753 atomic_inc(&adapter->running_cap_crqs); 3754 ibmvnic_send_crq(adapter, &crq); 3755 3756 if (adapter->netdev->flags & IFF_PROMISC) { 3757 if (adapter->promisc_supported) { 3758 crq.request_capability.capability = 3759 cpu_to_be16(PROMISC_REQUESTED); 3760 crq.request_capability.number = cpu_to_be64(1); 3761 atomic_inc(&adapter->running_cap_crqs); 3762 ibmvnic_send_crq(adapter, &crq); 3763 } 3764 } else { 3765 crq.request_capability.capability = 3766 cpu_to_be16(PROMISC_REQUESTED); 3767 crq.request_capability.number = cpu_to_be64(0); 3768 atomic_inc(&adapter->running_cap_crqs); 3769 ibmvnic_send_crq(adapter, &crq); 3770 } 3771 } 3772 3773 static int pending_scrq(struct ibmvnic_adapter *adapter, 3774 struct ibmvnic_sub_crq_queue *scrq) 3775 { 3776 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3777 int rc; 3778 3779 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3780 3781 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3782 * contents of the SCRQ descriptor 3783 */ 3784 dma_rmb(); 3785 3786 return rc; 3787 } 3788 3789 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3790 struct ibmvnic_sub_crq_queue *scrq) 3791 { 3792 union sub_crq *entry; 3793 unsigned long flags; 3794 3795 spin_lock_irqsave(&scrq->lock, flags); 3796 entry = &scrq->msgs[scrq->cur]; 3797 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3798 if (++scrq->cur == scrq->size) 3799 scrq->cur = 0; 3800 } else { 3801 entry = NULL; 3802 } 3803 spin_unlock_irqrestore(&scrq->lock, flags); 3804 3805 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3806 * contents of the SCRQ descriptor 3807 */ 3808 dma_rmb(); 3809 3810 return entry; 3811 } 3812 3813 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3814 { 3815 struct ibmvnic_crq_queue *queue = &adapter->crq; 3816 union ibmvnic_crq *crq; 3817 3818 crq = &queue->msgs[queue->cur]; 3819 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3820 if (++queue->cur == queue->size) 3821 queue->cur = 0; 3822 } else { 3823 crq = NULL; 3824 } 3825 3826 return crq; 3827 } 3828 3829 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3830 { 3831 switch (rc) { 3832 case H_PARAMETER: 3833 dev_warn_ratelimited(dev, 3834 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3835 func, rc); 3836 break; 3837 case H_CLOSED: 3838 dev_warn_ratelimited(dev, 3839 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3840 func, rc); 3841 break; 3842 default: 3843 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3844 break; 3845 } 3846 } 3847 3848 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3849 u64 remote_handle, u64 ioba, u64 num_entries) 3850 { 3851 unsigned int ua = adapter->vdev->unit_address; 3852 struct device *dev = &adapter->vdev->dev; 3853 int rc; 3854 3855 /* Make sure the hypervisor sees the complete request */ 3856 dma_wmb(); 3857 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3858 cpu_to_be64(remote_handle), 3859 ioba, num_entries); 3860 3861 if (rc) 3862 print_subcrq_error(dev, rc, __func__); 3863 3864 return rc; 3865 } 3866 3867 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3868 union ibmvnic_crq *crq) 3869 { 3870 unsigned int ua = adapter->vdev->unit_address; 3871 struct device *dev = &adapter->vdev->dev; 3872 u64 *u64_crq = (u64 *)crq; 3873 int rc; 3874 3875 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3876 (unsigned long)cpu_to_be64(u64_crq[0]), 3877 (unsigned long)cpu_to_be64(u64_crq[1])); 3878 3879 if (!adapter->crq.active && 3880 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3881 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3882 return -EINVAL; 3883 } 3884 3885 /* Make sure the hypervisor sees the complete request */ 3886 dma_wmb(); 3887 3888 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3889 cpu_to_be64(u64_crq[0]), 3890 cpu_to_be64(u64_crq[1])); 3891 3892 if (rc) { 3893 if (rc == H_CLOSED) { 3894 dev_warn(dev, "CRQ Queue closed\n"); 3895 /* do not reset, report the fail, wait for passive init from server */ 3896 } 3897 3898 dev_warn(dev, "Send error (rc=%d)\n", rc); 3899 } 3900 3901 return rc; 3902 } 3903 3904 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3905 { 3906 struct device *dev = &adapter->vdev->dev; 3907 union ibmvnic_crq crq; 3908 int retries = 100; 3909 int rc; 3910 3911 memset(&crq, 0, sizeof(crq)); 3912 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3913 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3914 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3915 3916 do { 3917 rc = ibmvnic_send_crq(adapter, &crq); 3918 if (rc != H_CLOSED) 3919 break; 3920 retries--; 3921 msleep(50); 3922 3923 } while (retries > 0); 3924 3925 if (rc) { 3926 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3927 return rc; 3928 } 3929 3930 return 0; 3931 } 3932 3933 struct vnic_login_client_data { 3934 u8 type; 3935 __be16 len; 3936 char name[]; 3937 } __packed; 3938 3939 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3940 { 3941 int len; 3942 3943 /* Calculate the amount of buffer space needed for the 3944 * vnic client data in the login buffer. There are four entries, 3945 * OS name, LPAR name, device name, and a null last entry. 3946 */ 3947 len = 4 * sizeof(struct vnic_login_client_data); 3948 len += 6; /* "Linux" plus NULL */ 3949 len += strlen(utsname()->nodename) + 1; 3950 len += strlen(adapter->netdev->name) + 1; 3951 3952 return len; 3953 } 3954 3955 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3956 struct vnic_login_client_data *vlcd) 3957 { 3958 const char *os_name = "Linux"; 3959 int len; 3960 3961 /* Type 1 - LPAR OS */ 3962 vlcd->type = 1; 3963 len = strlen(os_name) + 1; 3964 vlcd->len = cpu_to_be16(len); 3965 strscpy(vlcd->name, os_name, len); 3966 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3967 3968 /* Type 2 - LPAR name */ 3969 vlcd->type = 2; 3970 len = strlen(utsname()->nodename) + 1; 3971 vlcd->len = cpu_to_be16(len); 3972 strscpy(vlcd->name, utsname()->nodename, len); 3973 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3974 3975 /* Type 3 - device name */ 3976 vlcd->type = 3; 3977 len = strlen(adapter->netdev->name) + 1; 3978 vlcd->len = cpu_to_be16(len); 3979 strscpy(vlcd->name, adapter->netdev->name, len); 3980 } 3981 3982 static int send_login(struct ibmvnic_adapter *adapter) 3983 { 3984 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3985 struct ibmvnic_login_buffer *login_buffer; 3986 struct device *dev = &adapter->vdev->dev; 3987 struct vnic_login_client_data *vlcd; 3988 dma_addr_t rsp_buffer_token; 3989 dma_addr_t buffer_token; 3990 size_t rsp_buffer_size; 3991 union ibmvnic_crq crq; 3992 int client_data_len; 3993 size_t buffer_size; 3994 __be64 *tx_list_p; 3995 __be64 *rx_list_p; 3996 int rc; 3997 int i; 3998 3999 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4000 netdev_err(adapter->netdev, 4001 "RX or TX queues are not allocated, device login failed\n"); 4002 return -1; 4003 } 4004 4005 release_login_buffer(adapter); 4006 release_login_rsp_buffer(adapter); 4007 4008 client_data_len = vnic_client_data_len(adapter); 4009 4010 buffer_size = 4011 sizeof(struct ibmvnic_login_buffer) + 4012 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4013 client_data_len; 4014 4015 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4016 if (!login_buffer) 4017 goto buf_alloc_failed; 4018 4019 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4020 DMA_TO_DEVICE); 4021 if (dma_mapping_error(dev, buffer_token)) { 4022 dev_err(dev, "Couldn't map login buffer\n"); 4023 goto buf_map_failed; 4024 } 4025 4026 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4027 sizeof(u64) * adapter->req_tx_queues + 4028 sizeof(u64) * adapter->req_rx_queues + 4029 sizeof(u64) * adapter->req_rx_queues + 4030 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4031 4032 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4033 if (!login_rsp_buffer) 4034 goto buf_rsp_alloc_failed; 4035 4036 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4037 rsp_buffer_size, DMA_FROM_DEVICE); 4038 if (dma_mapping_error(dev, rsp_buffer_token)) { 4039 dev_err(dev, "Couldn't map login rsp buffer\n"); 4040 goto buf_rsp_map_failed; 4041 } 4042 4043 adapter->login_buf = login_buffer; 4044 adapter->login_buf_token = buffer_token; 4045 adapter->login_buf_sz = buffer_size; 4046 adapter->login_rsp_buf = login_rsp_buffer; 4047 adapter->login_rsp_buf_token = rsp_buffer_token; 4048 adapter->login_rsp_buf_sz = rsp_buffer_size; 4049 4050 login_buffer->len = cpu_to_be32(buffer_size); 4051 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4052 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4053 login_buffer->off_txcomp_subcrqs = 4054 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4055 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4056 login_buffer->off_rxcomp_subcrqs = 4057 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4058 sizeof(u64) * adapter->req_tx_queues); 4059 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4060 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4061 4062 tx_list_p = (__be64 *)((char *)login_buffer + 4063 sizeof(struct ibmvnic_login_buffer)); 4064 rx_list_p = (__be64 *)((char *)login_buffer + 4065 sizeof(struct ibmvnic_login_buffer) + 4066 sizeof(u64) * adapter->req_tx_queues); 4067 4068 for (i = 0; i < adapter->req_tx_queues; i++) { 4069 if (adapter->tx_scrq[i]) { 4070 tx_list_p[i] = 4071 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4072 } 4073 } 4074 4075 for (i = 0; i < adapter->req_rx_queues; i++) { 4076 if (adapter->rx_scrq[i]) { 4077 rx_list_p[i] = 4078 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4079 } 4080 } 4081 4082 /* Insert vNIC login client data */ 4083 vlcd = (struct vnic_login_client_data *) 4084 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4085 login_buffer->client_data_offset = 4086 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4087 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4088 4089 vnic_add_client_data(adapter, vlcd); 4090 4091 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4092 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4093 netdev_dbg(adapter->netdev, "%016lx\n", 4094 ((unsigned long *)(adapter->login_buf))[i]); 4095 } 4096 4097 memset(&crq, 0, sizeof(crq)); 4098 crq.login.first = IBMVNIC_CRQ_CMD; 4099 crq.login.cmd = LOGIN; 4100 crq.login.ioba = cpu_to_be32(buffer_token); 4101 crq.login.len = cpu_to_be32(buffer_size); 4102 4103 adapter->login_pending = true; 4104 rc = ibmvnic_send_crq(adapter, &crq); 4105 if (rc) { 4106 adapter->login_pending = false; 4107 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4108 goto buf_rsp_map_failed; 4109 } 4110 4111 return 0; 4112 4113 buf_rsp_map_failed: 4114 kfree(login_rsp_buffer); 4115 adapter->login_rsp_buf = NULL; 4116 buf_rsp_alloc_failed: 4117 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4118 buf_map_failed: 4119 kfree(login_buffer); 4120 adapter->login_buf = NULL; 4121 buf_alloc_failed: 4122 return -1; 4123 } 4124 4125 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4126 u32 len, u8 map_id) 4127 { 4128 union ibmvnic_crq crq; 4129 4130 memset(&crq, 0, sizeof(crq)); 4131 crq.request_map.first = IBMVNIC_CRQ_CMD; 4132 crq.request_map.cmd = REQUEST_MAP; 4133 crq.request_map.map_id = map_id; 4134 crq.request_map.ioba = cpu_to_be32(addr); 4135 crq.request_map.len = cpu_to_be32(len); 4136 return ibmvnic_send_crq(adapter, &crq); 4137 } 4138 4139 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4140 { 4141 union ibmvnic_crq crq; 4142 4143 memset(&crq, 0, sizeof(crq)); 4144 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4145 crq.request_unmap.cmd = REQUEST_UNMAP; 4146 crq.request_unmap.map_id = map_id; 4147 return ibmvnic_send_crq(adapter, &crq); 4148 } 4149 4150 static void send_query_map(struct ibmvnic_adapter *adapter) 4151 { 4152 union ibmvnic_crq crq; 4153 4154 memset(&crq, 0, sizeof(crq)); 4155 crq.query_map.first = IBMVNIC_CRQ_CMD; 4156 crq.query_map.cmd = QUERY_MAP; 4157 ibmvnic_send_crq(adapter, &crq); 4158 } 4159 4160 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4161 static void send_query_cap(struct ibmvnic_adapter *adapter) 4162 { 4163 union ibmvnic_crq crq; 4164 4165 atomic_set(&adapter->running_cap_crqs, 0); 4166 memset(&crq, 0, sizeof(crq)); 4167 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4168 crq.query_capability.cmd = QUERY_CAPABILITY; 4169 4170 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4171 atomic_inc(&adapter->running_cap_crqs); 4172 ibmvnic_send_crq(adapter, &crq); 4173 4174 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4175 atomic_inc(&adapter->running_cap_crqs); 4176 ibmvnic_send_crq(adapter, &crq); 4177 4178 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4179 atomic_inc(&adapter->running_cap_crqs); 4180 ibmvnic_send_crq(adapter, &crq); 4181 4182 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4183 atomic_inc(&adapter->running_cap_crqs); 4184 ibmvnic_send_crq(adapter, &crq); 4185 4186 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4187 atomic_inc(&adapter->running_cap_crqs); 4188 ibmvnic_send_crq(adapter, &crq); 4189 4190 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4191 atomic_inc(&adapter->running_cap_crqs); 4192 ibmvnic_send_crq(adapter, &crq); 4193 4194 crq.query_capability.capability = 4195 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4196 atomic_inc(&adapter->running_cap_crqs); 4197 ibmvnic_send_crq(adapter, &crq); 4198 4199 crq.query_capability.capability = 4200 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4201 atomic_inc(&adapter->running_cap_crqs); 4202 ibmvnic_send_crq(adapter, &crq); 4203 4204 crq.query_capability.capability = 4205 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4206 atomic_inc(&adapter->running_cap_crqs); 4207 ibmvnic_send_crq(adapter, &crq); 4208 4209 crq.query_capability.capability = 4210 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4211 atomic_inc(&adapter->running_cap_crqs); 4212 ibmvnic_send_crq(adapter, &crq); 4213 4214 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4215 atomic_inc(&adapter->running_cap_crqs); 4216 ibmvnic_send_crq(adapter, &crq); 4217 4218 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4219 atomic_inc(&adapter->running_cap_crqs); 4220 ibmvnic_send_crq(adapter, &crq); 4221 4222 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4223 atomic_inc(&adapter->running_cap_crqs); 4224 ibmvnic_send_crq(adapter, &crq); 4225 4226 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4227 atomic_inc(&adapter->running_cap_crqs); 4228 ibmvnic_send_crq(adapter, &crq); 4229 4230 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4231 atomic_inc(&adapter->running_cap_crqs); 4232 ibmvnic_send_crq(adapter, &crq); 4233 4234 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4235 atomic_inc(&adapter->running_cap_crqs); 4236 ibmvnic_send_crq(adapter, &crq); 4237 4238 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4239 atomic_inc(&adapter->running_cap_crqs); 4240 ibmvnic_send_crq(adapter, &crq); 4241 4242 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4243 atomic_inc(&adapter->running_cap_crqs); 4244 ibmvnic_send_crq(adapter, &crq); 4245 4246 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4247 atomic_inc(&adapter->running_cap_crqs); 4248 ibmvnic_send_crq(adapter, &crq); 4249 4250 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4251 atomic_inc(&adapter->running_cap_crqs); 4252 ibmvnic_send_crq(adapter, &crq); 4253 4254 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4255 atomic_inc(&adapter->running_cap_crqs); 4256 ibmvnic_send_crq(adapter, &crq); 4257 4258 crq.query_capability.capability = 4259 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4260 atomic_inc(&adapter->running_cap_crqs); 4261 ibmvnic_send_crq(adapter, &crq); 4262 4263 crq.query_capability.capability = 4264 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4265 atomic_inc(&adapter->running_cap_crqs); 4266 ibmvnic_send_crq(adapter, &crq); 4267 4268 crq.query_capability.capability = 4269 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4270 atomic_inc(&adapter->running_cap_crqs); 4271 ibmvnic_send_crq(adapter, &crq); 4272 4273 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4274 atomic_inc(&adapter->running_cap_crqs); 4275 ibmvnic_send_crq(adapter, &crq); 4276 } 4277 4278 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4279 { 4280 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4281 struct device *dev = &adapter->vdev->dev; 4282 union ibmvnic_crq crq; 4283 4284 adapter->ip_offload_tok = 4285 dma_map_single(dev, 4286 &adapter->ip_offload_buf, 4287 buf_sz, 4288 DMA_FROM_DEVICE); 4289 4290 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4291 if (!firmware_has_feature(FW_FEATURE_CMO)) 4292 dev_err(dev, "Couldn't map offload buffer\n"); 4293 return; 4294 } 4295 4296 memset(&crq, 0, sizeof(crq)); 4297 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4298 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4299 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4300 crq.query_ip_offload.ioba = 4301 cpu_to_be32(adapter->ip_offload_tok); 4302 4303 ibmvnic_send_crq(adapter, &crq); 4304 } 4305 4306 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4307 { 4308 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4309 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4310 struct device *dev = &adapter->vdev->dev; 4311 netdev_features_t old_hw_features = 0; 4312 union ibmvnic_crq crq; 4313 4314 adapter->ip_offload_ctrl_tok = 4315 dma_map_single(dev, 4316 ctrl_buf, 4317 sizeof(adapter->ip_offload_ctrl), 4318 DMA_TO_DEVICE); 4319 4320 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4321 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4322 return; 4323 } 4324 4325 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4326 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4327 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4328 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4329 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4330 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4331 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4332 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4333 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4334 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4335 4336 /* large_rx disabled for now, additional features needed */ 4337 ctrl_buf->large_rx_ipv4 = 0; 4338 ctrl_buf->large_rx_ipv6 = 0; 4339 4340 if (adapter->state != VNIC_PROBING) { 4341 old_hw_features = adapter->netdev->hw_features; 4342 adapter->netdev->hw_features = 0; 4343 } 4344 4345 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4346 4347 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4348 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4349 4350 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4351 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4352 4353 if ((adapter->netdev->features & 4354 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4355 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4356 4357 if (buf->large_tx_ipv4) 4358 adapter->netdev->hw_features |= NETIF_F_TSO; 4359 if (buf->large_tx_ipv6) 4360 adapter->netdev->hw_features |= NETIF_F_TSO6; 4361 4362 if (adapter->state == VNIC_PROBING) { 4363 adapter->netdev->features |= adapter->netdev->hw_features; 4364 } else if (old_hw_features != adapter->netdev->hw_features) { 4365 netdev_features_t tmp = 0; 4366 4367 /* disable features no longer supported */ 4368 adapter->netdev->features &= adapter->netdev->hw_features; 4369 /* turn on features now supported if previously enabled */ 4370 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4371 adapter->netdev->hw_features; 4372 adapter->netdev->features |= 4373 tmp & adapter->netdev->wanted_features; 4374 } 4375 4376 memset(&crq, 0, sizeof(crq)); 4377 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4378 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4379 crq.control_ip_offload.len = 4380 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4381 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4382 ibmvnic_send_crq(adapter, &crq); 4383 } 4384 4385 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4386 struct ibmvnic_adapter *adapter) 4387 { 4388 struct device *dev = &adapter->vdev->dev; 4389 4390 if (crq->get_vpd_size_rsp.rc.code) { 4391 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4392 crq->get_vpd_size_rsp.rc.code); 4393 complete(&adapter->fw_done); 4394 return; 4395 } 4396 4397 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4398 complete(&adapter->fw_done); 4399 } 4400 4401 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4402 struct ibmvnic_adapter *adapter) 4403 { 4404 struct device *dev = &adapter->vdev->dev; 4405 unsigned char *substr = NULL; 4406 u8 fw_level_len = 0; 4407 4408 memset(adapter->fw_version, 0, 32); 4409 4410 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4411 DMA_FROM_DEVICE); 4412 4413 if (crq->get_vpd_rsp.rc.code) { 4414 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4415 crq->get_vpd_rsp.rc.code); 4416 goto complete; 4417 } 4418 4419 /* get the position of the firmware version info 4420 * located after the ASCII 'RM' substring in the buffer 4421 */ 4422 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4423 if (!substr) { 4424 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4425 goto complete; 4426 } 4427 4428 /* get length of firmware level ASCII substring */ 4429 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4430 fw_level_len = *(substr + 2); 4431 } else { 4432 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4433 goto complete; 4434 } 4435 4436 /* copy firmware version string from vpd into adapter */ 4437 if ((substr + 3 + fw_level_len) < 4438 (adapter->vpd->buff + adapter->vpd->len)) { 4439 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4440 } else { 4441 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4442 } 4443 4444 complete: 4445 if (adapter->fw_version[0] == '\0') 4446 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4447 complete(&adapter->fw_done); 4448 } 4449 4450 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4451 { 4452 struct device *dev = &adapter->vdev->dev; 4453 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4454 int i; 4455 4456 dma_unmap_single(dev, adapter->ip_offload_tok, 4457 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4458 4459 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4460 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4461 netdev_dbg(adapter->netdev, "%016lx\n", 4462 ((unsigned long *)(buf))[i]); 4463 4464 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4465 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4466 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4467 buf->tcp_ipv4_chksum); 4468 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4469 buf->tcp_ipv6_chksum); 4470 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4471 buf->udp_ipv4_chksum); 4472 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4473 buf->udp_ipv6_chksum); 4474 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4475 buf->large_tx_ipv4); 4476 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4477 buf->large_tx_ipv6); 4478 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4479 buf->large_rx_ipv4); 4480 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4481 buf->large_rx_ipv6); 4482 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4483 buf->max_ipv4_header_size); 4484 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4485 buf->max_ipv6_header_size); 4486 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4487 buf->max_tcp_header_size); 4488 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4489 buf->max_udp_header_size); 4490 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4491 buf->max_large_tx_size); 4492 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4493 buf->max_large_rx_size); 4494 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4495 buf->ipv6_extension_header); 4496 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4497 buf->tcp_pseudosum_req); 4498 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4499 buf->num_ipv6_ext_headers); 4500 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4501 buf->off_ipv6_ext_headers); 4502 4503 send_control_ip_offload(adapter); 4504 } 4505 4506 static const char *ibmvnic_fw_err_cause(u16 cause) 4507 { 4508 switch (cause) { 4509 case ADAPTER_PROBLEM: 4510 return "adapter problem"; 4511 case BUS_PROBLEM: 4512 return "bus problem"; 4513 case FW_PROBLEM: 4514 return "firmware problem"; 4515 case DD_PROBLEM: 4516 return "device driver problem"; 4517 case EEH_RECOVERY: 4518 return "EEH recovery"; 4519 case FW_UPDATED: 4520 return "firmware updated"; 4521 case LOW_MEMORY: 4522 return "low Memory"; 4523 default: 4524 return "unknown"; 4525 } 4526 } 4527 4528 static void handle_error_indication(union ibmvnic_crq *crq, 4529 struct ibmvnic_adapter *adapter) 4530 { 4531 struct device *dev = &adapter->vdev->dev; 4532 u16 cause; 4533 4534 cause = be16_to_cpu(crq->error_indication.error_cause); 4535 4536 dev_warn_ratelimited(dev, 4537 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4538 crq->error_indication.flags 4539 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4540 ibmvnic_fw_err_cause(cause)); 4541 4542 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4543 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4544 else 4545 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4546 } 4547 4548 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4549 struct ibmvnic_adapter *adapter) 4550 { 4551 struct net_device *netdev = adapter->netdev; 4552 struct device *dev = &adapter->vdev->dev; 4553 long rc; 4554 4555 rc = crq->change_mac_addr_rsp.rc.code; 4556 if (rc) { 4557 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4558 goto out; 4559 } 4560 /* crq->change_mac_addr.mac_addr is the requested one 4561 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4562 */ 4563 ether_addr_copy(netdev->dev_addr, 4564 &crq->change_mac_addr_rsp.mac_addr[0]); 4565 ether_addr_copy(adapter->mac_addr, 4566 &crq->change_mac_addr_rsp.mac_addr[0]); 4567 out: 4568 complete(&adapter->fw_done); 4569 return rc; 4570 } 4571 4572 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4573 struct ibmvnic_adapter *adapter) 4574 { 4575 struct device *dev = &adapter->vdev->dev; 4576 u64 *req_value; 4577 char *name; 4578 4579 atomic_dec(&adapter->running_cap_crqs); 4580 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4581 case REQ_TX_QUEUES: 4582 req_value = &adapter->req_tx_queues; 4583 name = "tx"; 4584 break; 4585 case REQ_RX_QUEUES: 4586 req_value = &adapter->req_rx_queues; 4587 name = "rx"; 4588 break; 4589 case REQ_RX_ADD_QUEUES: 4590 req_value = &adapter->req_rx_add_queues; 4591 name = "rx_add"; 4592 break; 4593 case REQ_TX_ENTRIES_PER_SUBCRQ: 4594 req_value = &adapter->req_tx_entries_per_subcrq; 4595 name = "tx_entries_per_subcrq"; 4596 break; 4597 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4598 req_value = &adapter->req_rx_add_entries_per_subcrq; 4599 name = "rx_add_entries_per_subcrq"; 4600 break; 4601 case REQ_MTU: 4602 req_value = &adapter->req_mtu; 4603 name = "mtu"; 4604 break; 4605 case PROMISC_REQUESTED: 4606 req_value = &adapter->promisc; 4607 name = "promisc"; 4608 break; 4609 default: 4610 dev_err(dev, "Got invalid cap request rsp %d\n", 4611 crq->request_capability.capability); 4612 return; 4613 } 4614 4615 switch (crq->request_capability_rsp.rc.code) { 4616 case SUCCESS: 4617 break; 4618 case PARTIALSUCCESS: 4619 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4620 *req_value, 4621 (long)be64_to_cpu(crq->request_capability_rsp.number), 4622 name); 4623 4624 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4625 REQ_MTU) { 4626 pr_err("mtu of %llu is not supported. Reverting.\n", 4627 *req_value); 4628 *req_value = adapter->fallback.mtu; 4629 } else { 4630 *req_value = 4631 be64_to_cpu(crq->request_capability_rsp.number); 4632 } 4633 4634 send_request_cap(adapter, 1); 4635 return; 4636 default: 4637 dev_err(dev, "Error %d in request cap rsp\n", 4638 crq->request_capability_rsp.rc.code); 4639 return; 4640 } 4641 4642 /* Done receiving requested capabilities, query IP offload support */ 4643 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4644 adapter->wait_capability = false; 4645 send_query_ip_offload(adapter); 4646 } 4647 } 4648 4649 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4650 struct ibmvnic_adapter *adapter) 4651 { 4652 struct device *dev = &adapter->vdev->dev; 4653 struct net_device *netdev = adapter->netdev; 4654 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4655 struct ibmvnic_login_buffer *login = adapter->login_buf; 4656 u64 *tx_handle_array; 4657 u64 *rx_handle_array; 4658 int num_tx_pools; 4659 int num_rx_pools; 4660 u64 *size_array; 4661 int i; 4662 4663 /* CHECK: Test/set of login_pending does not need to be atomic 4664 * because only ibmvnic_tasklet tests/clears this. 4665 */ 4666 if (!adapter->login_pending) { 4667 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4668 return 0; 4669 } 4670 adapter->login_pending = false; 4671 4672 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4673 DMA_TO_DEVICE); 4674 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4675 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4676 4677 /* If the number of queues requested can't be allocated by the 4678 * server, the login response will return with code 1. We will need 4679 * to resend the login buffer with fewer queues requested. 4680 */ 4681 if (login_rsp_crq->generic.rc.code) { 4682 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4683 complete(&adapter->init_done); 4684 return 0; 4685 } 4686 4687 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4688 4689 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4690 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4691 netdev_dbg(adapter->netdev, "%016lx\n", 4692 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4693 } 4694 4695 /* Sanity checks */ 4696 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4697 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4698 adapter->req_rx_add_queues != 4699 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4700 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4701 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4702 return -EIO; 4703 } 4704 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4705 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4706 /* variable buffer sizes are not supported, so just read the 4707 * first entry. 4708 */ 4709 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4710 4711 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4712 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4713 4714 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4715 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4716 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4717 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4718 4719 for (i = 0; i < num_tx_pools; i++) 4720 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4721 4722 for (i = 0; i < num_rx_pools; i++) 4723 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4724 4725 adapter->num_active_tx_scrqs = num_tx_pools; 4726 adapter->num_active_rx_scrqs = num_rx_pools; 4727 release_login_rsp_buffer(adapter); 4728 release_login_buffer(adapter); 4729 complete(&adapter->init_done); 4730 4731 return 0; 4732 } 4733 4734 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4735 struct ibmvnic_adapter *adapter) 4736 { 4737 struct device *dev = &adapter->vdev->dev; 4738 long rc; 4739 4740 rc = crq->request_unmap_rsp.rc.code; 4741 if (rc) 4742 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4743 } 4744 4745 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4746 struct ibmvnic_adapter *adapter) 4747 { 4748 struct net_device *netdev = adapter->netdev; 4749 struct device *dev = &adapter->vdev->dev; 4750 long rc; 4751 4752 rc = crq->query_map_rsp.rc.code; 4753 if (rc) { 4754 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4755 return; 4756 } 4757 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4758 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4759 crq->query_map_rsp.free_pages); 4760 } 4761 4762 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4763 struct ibmvnic_adapter *adapter) 4764 { 4765 struct net_device *netdev = adapter->netdev; 4766 struct device *dev = &adapter->vdev->dev; 4767 long rc; 4768 4769 atomic_dec(&adapter->running_cap_crqs); 4770 netdev_dbg(netdev, "Outstanding queries: %d\n", 4771 atomic_read(&adapter->running_cap_crqs)); 4772 rc = crq->query_capability.rc.code; 4773 if (rc) { 4774 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4775 goto out; 4776 } 4777 4778 switch (be16_to_cpu(crq->query_capability.capability)) { 4779 case MIN_TX_QUEUES: 4780 adapter->min_tx_queues = 4781 be64_to_cpu(crq->query_capability.number); 4782 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4783 adapter->min_tx_queues); 4784 break; 4785 case MIN_RX_QUEUES: 4786 adapter->min_rx_queues = 4787 be64_to_cpu(crq->query_capability.number); 4788 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4789 adapter->min_rx_queues); 4790 break; 4791 case MIN_RX_ADD_QUEUES: 4792 adapter->min_rx_add_queues = 4793 be64_to_cpu(crq->query_capability.number); 4794 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4795 adapter->min_rx_add_queues); 4796 break; 4797 case MAX_TX_QUEUES: 4798 adapter->max_tx_queues = 4799 be64_to_cpu(crq->query_capability.number); 4800 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4801 adapter->max_tx_queues); 4802 break; 4803 case MAX_RX_QUEUES: 4804 adapter->max_rx_queues = 4805 be64_to_cpu(crq->query_capability.number); 4806 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4807 adapter->max_rx_queues); 4808 break; 4809 case MAX_RX_ADD_QUEUES: 4810 adapter->max_rx_add_queues = 4811 be64_to_cpu(crq->query_capability.number); 4812 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4813 adapter->max_rx_add_queues); 4814 break; 4815 case MIN_TX_ENTRIES_PER_SUBCRQ: 4816 adapter->min_tx_entries_per_subcrq = 4817 be64_to_cpu(crq->query_capability.number); 4818 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4819 adapter->min_tx_entries_per_subcrq); 4820 break; 4821 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4822 adapter->min_rx_add_entries_per_subcrq = 4823 be64_to_cpu(crq->query_capability.number); 4824 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4825 adapter->min_rx_add_entries_per_subcrq); 4826 break; 4827 case MAX_TX_ENTRIES_PER_SUBCRQ: 4828 adapter->max_tx_entries_per_subcrq = 4829 be64_to_cpu(crq->query_capability.number); 4830 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4831 adapter->max_tx_entries_per_subcrq); 4832 break; 4833 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4834 adapter->max_rx_add_entries_per_subcrq = 4835 be64_to_cpu(crq->query_capability.number); 4836 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4837 adapter->max_rx_add_entries_per_subcrq); 4838 break; 4839 case TCP_IP_OFFLOAD: 4840 adapter->tcp_ip_offload = 4841 be64_to_cpu(crq->query_capability.number); 4842 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4843 adapter->tcp_ip_offload); 4844 break; 4845 case PROMISC_SUPPORTED: 4846 adapter->promisc_supported = 4847 be64_to_cpu(crq->query_capability.number); 4848 netdev_dbg(netdev, "promisc_supported = %lld\n", 4849 adapter->promisc_supported); 4850 break; 4851 case MIN_MTU: 4852 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4853 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4854 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4855 break; 4856 case MAX_MTU: 4857 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4858 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4859 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4860 break; 4861 case MAX_MULTICAST_FILTERS: 4862 adapter->max_multicast_filters = 4863 be64_to_cpu(crq->query_capability.number); 4864 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4865 adapter->max_multicast_filters); 4866 break; 4867 case VLAN_HEADER_INSERTION: 4868 adapter->vlan_header_insertion = 4869 be64_to_cpu(crq->query_capability.number); 4870 if (adapter->vlan_header_insertion) 4871 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4872 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4873 adapter->vlan_header_insertion); 4874 break; 4875 case RX_VLAN_HEADER_INSERTION: 4876 adapter->rx_vlan_header_insertion = 4877 be64_to_cpu(crq->query_capability.number); 4878 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4879 adapter->rx_vlan_header_insertion); 4880 break; 4881 case MAX_TX_SG_ENTRIES: 4882 adapter->max_tx_sg_entries = 4883 be64_to_cpu(crq->query_capability.number); 4884 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4885 adapter->max_tx_sg_entries); 4886 break; 4887 case RX_SG_SUPPORTED: 4888 adapter->rx_sg_supported = 4889 be64_to_cpu(crq->query_capability.number); 4890 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4891 adapter->rx_sg_supported); 4892 break; 4893 case OPT_TX_COMP_SUB_QUEUES: 4894 adapter->opt_tx_comp_sub_queues = 4895 be64_to_cpu(crq->query_capability.number); 4896 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4897 adapter->opt_tx_comp_sub_queues); 4898 break; 4899 case OPT_RX_COMP_QUEUES: 4900 adapter->opt_rx_comp_queues = 4901 be64_to_cpu(crq->query_capability.number); 4902 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4903 adapter->opt_rx_comp_queues); 4904 break; 4905 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4906 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4907 be64_to_cpu(crq->query_capability.number); 4908 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4909 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4910 break; 4911 case OPT_TX_ENTRIES_PER_SUBCRQ: 4912 adapter->opt_tx_entries_per_subcrq = 4913 be64_to_cpu(crq->query_capability.number); 4914 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4915 adapter->opt_tx_entries_per_subcrq); 4916 break; 4917 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4918 adapter->opt_rxba_entries_per_subcrq = 4919 be64_to_cpu(crq->query_capability.number); 4920 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4921 adapter->opt_rxba_entries_per_subcrq); 4922 break; 4923 case TX_RX_DESC_REQ: 4924 adapter->tx_rx_desc_req = crq->query_capability.number; 4925 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4926 adapter->tx_rx_desc_req); 4927 break; 4928 4929 default: 4930 netdev_err(netdev, "Got invalid cap rsp %d\n", 4931 crq->query_capability.capability); 4932 } 4933 4934 out: 4935 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4936 adapter->wait_capability = false; 4937 send_request_cap(adapter, 0); 4938 } 4939 } 4940 4941 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4942 { 4943 union ibmvnic_crq crq; 4944 int rc; 4945 4946 memset(&crq, 0, sizeof(crq)); 4947 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4948 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4949 4950 mutex_lock(&adapter->fw_lock); 4951 adapter->fw_done_rc = 0; 4952 reinit_completion(&adapter->fw_done); 4953 4954 rc = ibmvnic_send_crq(adapter, &crq); 4955 if (rc) { 4956 mutex_unlock(&adapter->fw_lock); 4957 return rc; 4958 } 4959 4960 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4961 if (rc) { 4962 mutex_unlock(&adapter->fw_lock); 4963 return rc; 4964 } 4965 4966 mutex_unlock(&adapter->fw_lock); 4967 return adapter->fw_done_rc ? -EIO : 0; 4968 } 4969 4970 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4971 struct ibmvnic_adapter *adapter) 4972 { 4973 struct net_device *netdev = adapter->netdev; 4974 int rc; 4975 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4976 4977 rc = crq->query_phys_parms_rsp.rc.code; 4978 if (rc) { 4979 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4980 return rc; 4981 } 4982 switch (rspeed) { 4983 case IBMVNIC_10MBPS: 4984 adapter->speed = SPEED_10; 4985 break; 4986 case IBMVNIC_100MBPS: 4987 adapter->speed = SPEED_100; 4988 break; 4989 case IBMVNIC_1GBPS: 4990 adapter->speed = SPEED_1000; 4991 break; 4992 case IBMVNIC_10GBPS: 4993 adapter->speed = SPEED_10000; 4994 break; 4995 case IBMVNIC_25GBPS: 4996 adapter->speed = SPEED_25000; 4997 break; 4998 case IBMVNIC_40GBPS: 4999 adapter->speed = SPEED_40000; 5000 break; 5001 case IBMVNIC_50GBPS: 5002 adapter->speed = SPEED_50000; 5003 break; 5004 case IBMVNIC_100GBPS: 5005 adapter->speed = SPEED_100000; 5006 break; 5007 case IBMVNIC_200GBPS: 5008 adapter->speed = SPEED_200000; 5009 break; 5010 default: 5011 if (netif_carrier_ok(netdev)) 5012 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5013 adapter->speed = SPEED_UNKNOWN; 5014 } 5015 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5016 adapter->duplex = DUPLEX_FULL; 5017 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5018 adapter->duplex = DUPLEX_HALF; 5019 else 5020 adapter->duplex = DUPLEX_UNKNOWN; 5021 5022 return rc; 5023 } 5024 5025 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5026 struct ibmvnic_adapter *adapter) 5027 { 5028 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5029 struct net_device *netdev = adapter->netdev; 5030 struct device *dev = &adapter->vdev->dev; 5031 u64 *u64_crq = (u64 *)crq; 5032 long rc; 5033 5034 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5035 (unsigned long)cpu_to_be64(u64_crq[0]), 5036 (unsigned long)cpu_to_be64(u64_crq[1])); 5037 switch (gen_crq->first) { 5038 case IBMVNIC_CRQ_INIT_RSP: 5039 switch (gen_crq->cmd) { 5040 case IBMVNIC_CRQ_INIT: 5041 dev_info(dev, "Partner initialized\n"); 5042 adapter->from_passive_init = true; 5043 /* Discard any stale login responses from prev reset. 5044 * CHECK: should we clear even on INIT_COMPLETE? 5045 */ 5046 adapter->login_pending = false; 5047 5048 if (!completion_done(&adapter->init_done)) { 5049 complete(&adapter->init_done); 5050 adapter->init_done_rc = -EIO; 5051 } 5052 5053 if (adapter->state == VNIC_DOWN) 5054 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5055 else 5056 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5057 5058 if (rc && rc != -EBUSY) { 5059 /* We were unable to schedule the failover 5060 * reset either because the adapter was still 5061 * probing (eg: during kexec) or we could not 5062 * allocate memory. Clear the failover_pending 5063 * flag since no one else will. We ignore 5064 * EBUSY because it means either FAILOVER reset 5065 * is already scheduled or the adapter is 5066 * being removed. 5067 */ 5068 netdev_err(netdev, 5069 "Error %ld scheduling failover reset\n", 5070 rc); 5071 adapter->failover_pending = false; 5072 } 5073 break; 5074 case IBMVNIC_CRQ_INIT_COMPLETE: 5075 dev_info(dev, "Partner initialization complete\n"); 5076 adapter->crq.active = true; 5077 send_version_xchg(adapter); 5078 break; 5079 default: 5080 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5081 } 5082 return; 5083 case IBMVNIC_CRQ_XPORT_EVENT: 5084 netif_carrier_off(netdev); 5085 adapter->crq.active = false; 5086 /* terminate any thread waiting for a response 5087 * from the device 5088 */ 5089 if (!completion_done(&adapter->fw_done)) { 5090 adapter->fw_done_rc = -EIO; 5091 complete(&adapter->fw_done); 5092 } 5093 if (!completion_done(&adapter->stats_done)) 5094 complete(&adapter->stats_done); 5095 if (test_bit(0, &adapter->resetting)) 5096 adapter->force_reset_recovery = true; 5097 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5098 dev_info(dev, "Migrated, re-enabling adapter\n"); 5099 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5100 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5101 dev_info(dev, "Backing device failover detected\n"); 5102 adapter->failover_pending = true; 5103 } else { 5104 /* The adapter lost the connection */ 5105 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5106 gen_crq->cmd); 5107 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5108 } 5109 return; 5110 case IBMVNIC_CRQ_CMD_RSP: 5111 break; 5112 default: 5113 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5114 gen_crq->first); 5115 return; 5116 } 5117 5118 switch (gen_crq->cmd) { 5119 case VERSION_EXCHANGE_RSP: 5120 rc = crq->version_exchange_rsp.rc.code; 5121 if (rc) { 5122 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5123 break; 5124 } 5125 ibmvnic_version = 5126 be16_to_cpu(crq->version_exchange_rsp.version); 5127 dev_info(dev, "Partner protocol version is %d\n", 5128 ibmvnic_version); 5129 send_query_cap(adapter); 5130 break; 5131 case QUERY_CAPABILITY_RSP: 5132 handle_query_cap_rsp(crq, adapter); 5133 break; 5134 case QUERY_MAP_RSP: 5135 handle_query_map_rsp(crq, adapter); 5136 break; 5137 case REQUEST_MAP_RSP: 5138 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5139 complete(&adapter->fw_done); 5140 break; 5141 case REQUEST_UNMAP_RSP: 5142 handle_request_unmap_rsp(crq, adapter); 5143 break; 5144 case REQUEST_CAPABILITY_RSP: 5145 handle_request_cap_rsp(crq, adapter); 5146 break; 5147 case LOGIN_RSP: 5148 netdev_dbg(netdev, "Got Login Response\n"); 5149 handle_login_rsp(crq, adapter); 5150 break; 5151 case LOGICAL_LINK_STATE_RSP: 5152 netdev_dbg(netdev, 5153 "Got Logical Link State Response, state: %d rc: %d\n", 5154 crq->logical_link_state_rsp.link_state, 5155 crq->logical_link_state_rsp.rc.code); 5156 adapter->logical_link_state = 5157 crq->logical_link_state_rsp.link_state; 5158 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5159 complete(&adapter->init_done); 5160 break; 5161 case LINK_STATE_INDICATION: 5162 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5163 adapter->phys_link_state = 5164 crq->link_state_indication.phys_link_state; 5165 adapter->logical_link_state = 5166 crq->link_state_indication.logical_link_state; 5167 if (adapter->phys_link_state && adapter->logical_link_state) 5168 netif_carrier_on(netdev); 5169 else 5170 netif_carrier_off(netdev); 5171 break; 5172 case CHANGE_MAC_ADDR_RSP: 5173 netdev_dbg(netdev, "Got MAC address change Response\n"); 5174 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5175 break; 5176 case ERROR_INDICATION: 5177 netdev_dbg(netdev, "Got Error Indication\n"); 5178 handle_error_indication(crq, adapter); 5179 break; 5180 case REQUEST_STATISTICS_RSP: 5181 netdev_dbg(netdev, "Got Statistics Response\n"); 5182 complete(&adapter->stats_done); 5183 break; 5184 case QUERY_IP_OFFLOAD_RSP: 5185 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5186 handle_query_ip_offload_rsp(adapter); 5187 break; 5188 case MULTICAST_CTRL_RSP: 5189 netdev_dbg(netdev, "Got multicast control Response\n"); 5190 break; 5191 case CONTROL_IP_OFFLOAD_RSP: 5192 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5193 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5194 sizeof(adapter->ip_offload_ctrl), 5195 DMA_TO_DEVICE); 5196 complete(&adapter->init_done); 5197 break; 5198 case COLLECT_FW_TRACE_RSP: 5199 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5200 complete(&adapter->fw_done); 5201 break; 5202 case GET_VPD_SIZE_RSP: 5203 handle_vpd_size_rsp(crq, adapter); 5204 break; 5205 case GET_VPD_RSP: 5206 handle_vpd_rsp(crq, adapter); 5207 break; 5208 case QUERY_PHYS_PARMS_RSP: 5209 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5210 complete(&adapter->fw_done); 5211 break; 5212 default: 5213 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5214 gen_crq->cmd); 5215 } 5216 } 5217 5218 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5219 { 5220 struct ibmvnic_adapter *adapter = instance; 5221 5222 tasklet_schedule(&adapter->tasklet); 5223 return IRQ_HANDLED; 5224 } 5225 5226 static void ibmvnic_tasklet(struct tasklet_struct *t) 5227 { 5228 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5229 struct ibmvnic_crq_queue *queue = &adapter->crq; 5230 union ibmvnic_crq *crq; 5231 unsigned long flags; 5232 bool done = false; 5233 5234 spin_lock_irqsave(&queue->lock, flags); 5235 while (!done) { 5236 /* Pull all the valid messages off the CRQ */ 5237 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5238 /* This barrier makes sure ibmvnic_next_crq()'s 5239 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5240 * before ibmvnic_handle_crq()'s 5241 * switch(gen_crq->first) and switch(gen_crq->cmd). 5242 */ 5243 dma_rmb(); 5244 ibmvnic_handle_crq(crq, adapter); 5245 crq->generic.first = 0; 5246 } 5247 5248 /* remain in tasklet until all 5249 * capabilities responses are received 5250 */ 5251 if (!adapter->wait_capability) 5252 done = true; 5253 } 5254 /* if capabilities CRQ's were sent in this tasklet, the following 5255 * tasklet must wait until all responses are received 5256 */ 5257 if (atomic_read(&adapter->running_cap_crqs) != 0) 5258 adapter->wait_capability = true; 5259 spin_unlock_irqrestore(&queue->lock, flags); 5260 } 5261 5262 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5263 { 5264 struct vio_dev *vdev = adapter->vdev; 5265 int rc; 5266 5267 do { 5268 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5269 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5270 5271 if (rc) 5272 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5273 5274 return rc; 5275 } 5276 5277 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5278 { 5279 struct ibmvnic_crq_queue *crq = &adapter->crq; 5280 struct device *dev = &adapter->vdev->dev; 5281 struct vio_dev *vdev = adapter->vdev; 5282 int rc; 5283 5284 /* Close the CRQ */ 5285 do { 5286 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5287 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5288 5289 /* Clean out the queue */ 5290 if (!crq->msgs) 5291 return -EINVAL; 5292 5293 memset(crq->msgs, 0, PAGE_SIZE); 5294 crq->cur = 0; 5295 crq->active = false; 5296 5297 /* And re-open it again */ 5298 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5299 crq->msg_token, PAGE_SIZE); 5300 5301 if (rc == H_CLOSED) 5302 /* Adapter is good, but other end is not ready */ 5303 dev_warn(dev, "Partner adapter not ready\n"); 5304 else if (rc != 0) 5305 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5306 5307 return rc; 5308 } 5309 5310 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5311 { 5312 struct ibmvnic_crq_queue *crq = &adapter->crq; 5313 struct vio_dev *vdev = adapter->vdev; 5314 long rc; 5315 5316 if (!crq->msgs) 5317 return; 5318 5319 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5320 free_irq(vdev->irq, adapter); 5321 tasklet_kill(&adapter->tasklet); 5322 do { 5323 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5324 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5325 5326 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5327 DMA_BIDIRECTIONAL); 5328 free_page((unsigned long)crq->msgs); 5329 crq->msgs = NULL; 5330 crq->active = false; 5331 } 5332 5333 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5334 { 5335 struct ibmvnic_crq_queue *crq = &adapter->crq; 5336 struct device *dev = &adapter->vdev->dev; 5337 struct vio_dev *vdev = adapter->vdev; 5338 int rc, retrc = -ENOMEM; 5339 5340 if (crq->msgs) 5341 return 0; 5342 5343 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5344 /* Should we allocate more than one page? */ 5345 5346 if (!crq->msgs) 5347 return -ENOMEM; 5348 5349 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5350 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5351 DMA_BIDIRECTIONAL); 5352 if (dma_mapping_error(dev, crq->msg_token)) 5353 goto map_failed; 5354 5355 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5356 crq->msg_token, PAGE_SIZE); 5357 5358 if (rc == H_RESOURCE) 5359 /* maybe kexecing and resource is busy. try a reset */ 5360 rc = ibmvnic_reset_crq(adapter); 5361 retrc = rc; 5362 5363 if (rc == H_CLOSED) { 5364 dev_warn(dev, "Partner adapter not ready\n"); 5365 } else if (rc) { 5366 dev_warn(dev, "Error %d opening adapter\n", rc); 5367 goto reg_crq_failed; 5368 } 5369 5370 retrc = 0; 5371 5372 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5373 5374 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5375 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5376 adapter->vdev->unit_address); 5377 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5378 if (rc) { 5379 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5380 vdev->irq, rc); 5381 goto req_irq_failed; 5382 } 5383 5384 rc = vio_enable_interrupts(vdev); 5385 if (rc) { 5386 dev_err(dev, "Error %d enabling interrupts\n", rc); 5387 goto req_irq_failed; 5388 } 5389 5390 crq->cur = 0; 5391 spin_lock_init(&crq->lock); 5392 5393 return retrc; 5394 5395 req_irq_failed: 5396 tasklet_kill(&adapter->tasklet); 5397 do { 5398 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5399 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5400 reg_crq_failed: 5401 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5402 map_failed: 5403 free_page((unsigned long)crq->msgs); 5404 crq->msgs = NULL; 5405 return retrc; 5406 } 5407 5408 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5409 { 5410 struct device *dev = &adapter->vdev->dev; 5411 unsigned long timeout = msecs_to_jiffies(20000); 5412 u64 old_num_rx_queues = adapter->req_rx_queues; 5413 u64 old_num_tx_queues = adapter->req_tx_queues; 5414 int rc; 5415 5416 adapter->from_passive_init = false; 5417 5418 if (reset) 5419 reinit_completion(&adapter->init_done); 5420 5421 adapter->init_done_rc = 0; 5422 rc = ibmvnic_send_crq_init(adapter); 5423 if (rc) { 5424 dev_err(dev, "Send crq init failed with error %d\n", rc); 5425 return rc; 5426 } 5427 5428 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5429 dev_err(dev, "Initialization sequence timed out\n"); 5430 return -1; 5431 } 5432 5433 if (adapter->init_done_rc) { 5434 release_crq_queue(adapter); 5435 return adapter->init_done_rc; 5436 } 5437 5438 if (adapter->from_passive_init) { 5439 adapter->state = VNIC_OPEN; 5440 adapter->from_passive_init = false; 5441 return -1; 5442 } 5443 5444 if (reset && 5445 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5446 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5447 if (adapter->req_rx_queues != old_num_rx_queues || 5448 adapter->req_tx_queues != old_num_tx_queues) { 5449 release_sub_crqs(adapter, 0); 5450 rc = init_sub_crqs(adapter); 5451 } else { 5452 rc = reset_sub_crq_queues(adapter); 5453 } 5454 } else { 5455 rc = init_sub_crqs(adapter); 5456 } 5457 5458 if (rc) { 5459 dev_err(dev, "Initialization of sub crqs failed\n"); 5460 release_crq_queue(adapter); 5461 return rc; 5462 } 5463 5464 rc = init_sub_crq_irqs(adapter); 5465 if (rc) { 5466 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5467 release_crq_queue(adapter); 5468 } 5469 5470 return rc; 5471 } 5472 5473 static struct device_attribute dev_attr_failover; 5474 5475 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5476 { 5477 struct ibmvnic_adapter *adapter; 5478 struct net_device *netdev; 5479 unsigned char *mac_addr_p; 5480 bool init_success; 5481 int rc; 5482 5483 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5484 dev->unit_address); 5485 5486 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5487 VETH_MAC_ADDR, NULL); 5488 if (!mac_addr_p) { 5489 dev_err(&dev->dev, 5490 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5491 __FILE__, __LINE__); 5492 return 0; 5493 } 5494 5495 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5496 IBMVNIC_MAX_QUEUES); 5497 if (!netdev) 5498 return -ENOMEM; 5499 5500 adapter = netdev_priv(netdev); 5501 adapter->state = VNIC_PROBING; 5502 dev_set_drvdata(&dev->dev, netdev); 5503 adapter->vdev = dev; 5504 adapter->netdev = netdev; 5505 adapter->login_pending = false; 5506 5507 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5508 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5509 netdev->irq = dev->irq; 5510 netdev->netdev_ops = &ibmvnic_netdev_ops; 5511 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5512 SET_NETDEV_DEV(netdev, &dev->dev); 5513 5514 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5515 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5516 __ibmvnic_delayed_reset); 5517 INIT_LIST_HEAD(&adapter->rwi_list); 5518 spin_lock_init(&adapter->rwi_lock); 5519 spin_lock_init(&adapter->state_lock); 5520 mutex_init(&adapter->fw_lock); 5521 init_completion(&adapter->init_done); 5522 init_completion(&adapter->fw_done); 5523 init_completion(&adapter->reset_done); 5524 init_completion(&adapter->stats_done); 5525 clear_bit(0, &adapter->resetting); 5526 5527 init_success = false; 5528 do { 5529 rc = init_crq_queue(adapter); 5530 if (rc) { 5531 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5532 rc); 5533 goto ibmvnic_init_fail; 5534 } 5535 5536 rc = ibmvnic_reset_init(adapter, false); 5537 } while (rc == EAGAIN); 5538 5539 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5540 * partner is not ready. CRQ is not active. When the partner becomes 5541 * ready, we will do the passive init reset. 5542 */ 5543 5544 if (!rc) 5545 init_success = true; 5546 5547 rc = init_stats_buffers(adapter); 5548 if (rc) 5549 goto ibmvnic_init_fail; 5550 5551 rc = init_stats_token(adapter); 5552 if (rc) 5553 goto ibmvnic_stats_fail; 5554 5555 rc = device_create_file(&dev->dev, &dev_attr_failover); 5556 if (rc) 5557 goto ibmvnic_dev_file_err; 5558 5559 netif_carrier_off(netdev); 5560 rc = register_netdev(netdev); 5561 if (rc) { 5562 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5563 goto ibmvnic_register_fail; 5564 } 5565 dev_info(&dev->dev, "ibmvnic registered\n"); 5566 5567 if (init_success) { 5568 adapter->state = VNIC_PROBED; 5569 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5570 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5571 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5572 } else { 5573 adapter->state = VNIC_DOWN; 5574 } 5575 5576 adapter->wait_for_reset = false; 5577 adapter->last_reset_time = jiffies; 5578 return 0; 5579 5580 ibmvnic_register_fail: 5581 device_remove_file(&dev->dev, &dev_attr_failover); 5582 5583 ibmvnic_dev_file_err: 5584 release_stats_token(adapter); 5585 5586 ibmvnic_stats_fail: 5587 release_stats_buffers(adapter); 5588 5589 ibmvnic_init_fail: 5590 release_sub_crqs(adapter, 1); 5591 release_crq_queue(adapter); 5592 mutex_destroy(&adapter->fw_lock); 5593 free_netdev(netdev); 5594 5595 return rc; 5596 } 5597 5598 static void ibmvnic_remove(struct vio_dev *dev) 5599 { 5600 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5601 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5602 unsigned long flags; 5603 5604 spin_lock_irqsave(&adapter->state_lock, flags); 5605 5606 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5607 * finish. Then, set the state to REMOVING to prevent it from 5608 * scheduling any more work and to have reset functions ignore 5609 * any resets that have already been scheduled. Drop the lock 5610 * after setting state, so __ibmvnic_reset() which is called 5611 * from the flush_work() below, can make progress. 5612 */ 5613 spin_lock(&adapter->rwi_lock); 5614 adapter->state = VNIC_REMOVING; 5615 spin_unlock(&adapter->rwi_lock); 5616 5617 spin_unlock_irqrestore(&adapter->state_lock, flags); 5618 5619 flush_work(&adapter->ibmvnic_reset); 5620 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5621 5622 rtnl_lock(); 5623 unregister_netdevice(netdev); 5624 5625 release_resources(adapter); 5626 release_sub_crqs(adapter, 1); 5627 release_crq_queue(adapter); 5628 5629 release_stats_token(adapter); 5630 release_stats_buffers(adapter); 5631 5632 adapter->state = VNIC_REMOVED; 5633 5634 rtnl_unlock(); 5635 mutex_destroy(&adapter->fw_lock); 5636 device_remove_file(&dev->dev, &dev_attr_failover); 5637 free_netdev(netdev); 5638 dev_set_drvdata(&dev->dev, NULL); 5639 } 5640 5641 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5642 const char *buf, size_t count) 5643 { 5644 struct net_device *netdev = dev_get_drvdata(dev); 5645 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5646 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5647 __be64 session_token; 5648 long rc; 5649 5650 if (!sysfs_streq(buf, "1")) 5651 return -EINVAL; 5652 5653 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5654 H_GET_SESSION_TOKEN, 0, 0, 0); 5655 if (rc) { 5656 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5657 rc); 5658 goto last_resort; 5659 } 5660 5661 session_token = (__be64)retbuf[0]; 5662 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5663 be64_to_cpu(session_token)); 5664 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5665 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5666 if (rc) 5667 netdev_err(netdev, 5668 "H_VIOCTL initiated failover failed, rc %ld\n", 5669 rc); 5670 5671 last_resort: 5672 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5673 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5674 5675 return count; 5676 } 5677 static DEVICE_ATTR_WO(failover); 5678 5679 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5680 { 5681 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5682 struct ibmvnic_adapter *adapter; 5683 struct iommu_table *tbl; 5684 unsigned long ret = 0; 5685 int i; 5686 5687 tbl = get_iommu_table_base(&vdev->dev); 5688 5689 /* netdev inits at probe time along with the structures we need below*/ 5690 if (!netdev) 5691 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5692 5693 adapter = netdev_priv(netdev); 5694 5695 ret += PAGE_SIZE; /* the crq message queue */ 5696 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5697 5698 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5699 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5700 5701 for (i = 0; i < adapter->num_active_rx_pools; i++) 5702 ret += adapter->rx_pool[i].size * 5703 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5704 5705 return ret; 5706 } 5707 5708 static int ibmvnic_resume(struct device *dev) 5709 { 5710 struct net_device *netdev = dev_get_drvdata(dev); 5711 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5712 5713 if (adapter->state != VNIC_OPEN) 5714 return 0; 5715 5716 tasklet_schedule(&adapter->tasklet); 5717 5718 return 0; 5719 } 5720 5721 static const struct vio_device_id ibmvnic_device_table[] = { 5722 {"network", "IBM,vnic"}, 5723 {"", "" } 5724 }; 5725 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5726 5727 static const struct dev_pm_ops ibmvnic_pm_ops = { 5728 .resume = ibmvnic_resume 5729 }; 5730 5731 static struct vio_driver ibmvnic_driver = { 5732 .id_table = ibmvnic_device_table, 5733 .probe = ibmvnic_probe, 5734 .remove = ibmvnic_remove, 5735 .get_desired_dma = ibmvnic_get_desired_dma, 5736 .name = ibmvnic_driver_name, 5737 .pm = &ibmvnic_pm_ops, 5738 }; 5739 5740 /* module functions */ 5741 static int __init ibmvnic_module_init(void) 5742 { 5743 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5744 IBMVNIC_DRIVER_VERSION); 5745 5746 return vio_register_driver(&ibmvnic_driver); 5747 } 5748 5749 static void __exit ibmvnic_module_exit(void) 5750 { 5751 vio_unregister_driver(&ibmvnic_driver); 5752 } 5753 5754 module_init(ibmvnic_module_init); 5755 module_exit(ibmvnic_module_exit); 5756