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 goto out; 1735 } 1736 1737 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1738 tx_dropped++; 1739 tx_send_failed++; 1740 ret = NETDEV_TX_OK; 1741 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1742 goto out; 1743 } 1744 if (skb_is_gso(skb)) 1745 tx_pool = &adapter->tso_pool[queue_num]; 1746 else 1747 tx_pool = &adapter->tx_pool[queue_num]; 1748 1749 index = tx_pool->free_map[tx_pool->consumer_index]; 1750 1751 if (index == IBMVNIC_INVALID_MAP) { 1752 dev_kfree_skb_any(skb); 1753 tx_send_failed++; 1754 tx_dropped++; 1755 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 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_adapter *adapter; 2424 bool saved_state = false; 2425 struct ibmvnic_rwi *tmprwi; 2426 struct ibmvnic_rwi *rwi; 2427 unsigned long flags; 2428 u32 reset_state; 2429 int rc = 0; 2430 2431 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2432 2433 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2434 queue_delayed_work(system_long_wq, 2435 &adapter->ibmvnic_delayed_reset, 2436 IBMVNIC_RESET_DELAY); 2437 return; 2438 } 2439 2440 rwi = get_next_rwi(adapter); 2441 while (rwi) { 2442 spin_lock_irqsave(&adapter->state_lock, flags); 2443 2444 if (adapter->state == VNIC_REMOVING || 2445 adapter->state == VNIC_REMOVED) { 2446 spin_unlock_irqrestore(&adapter->state_lock, flags); 2447 kfree(rwi); 2448 rc = EBUSY; 2449 break; 2450 } 2451 2452 if (!saved_state) { 2453 reset_state = adapter->state; 2454 saved_state = true; 2455 } 2456 spin_unlock_irqrestore(&adapter->state_lock, flags); 2457 2458 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2459 rtnl_lock(); 2460 rc = do_passive_init(adapter); 2461 rtnl_unlock(); 2462 if (!rc) 2463 netif_carrier_on(adapter->netdev); 2464 } else if (adapter->force_reset_recovery) { 2465 /* Since we are doing a hard reset now, clear the 2466 * failover_pending flag so we don't ignore any 2467 * future MOBILITY or other resets. 2468 */ 2469 adapter->failover_pending = false; 2470 2471 /* Transport event occurred during previous reset */ 2472 if (adapter->wait_for_reset) { 2473 /* Previous was CHANGE_PARAM; caller locked */ 2474 adapter->force_reset_recovery = false; 2475 rc = do_hard_reset(adapter, rwi, reset_state); 2476 } else { 2477 rtnl_lock(); 2478 adapter->force_reset_recovery = false; 2479 rc = do_hard_reset(adapter, rwi, reset_state); 2480 rtnl_unlock(); 2481 } 2482 if (rc) { 2483 /* give backing device time to settle down */ 2484 netdev_dbg(adapter->netdev, 2485 "[S:%s] Hard reset failed, waiting 60 secs\n", 2486 adapter_state_to_string(adapter->state)); 2487 set_current_state(TASK_UNINTERRUPTIBLE); 2488 schedule_timeout(60 * HZ); 2489 } 2490 } else { 2491 rc = do_reset(adapter, rwi, reset_state); 2492 } 2493 tmprwi = rwi; 2494 adapter->last_reset_time = jiffies; 2495 2496 if (rc) 2497 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2498 2499 rwi = get_next_rwi(adapter); 2500 2501 /* 2502 * If there is another reset queued, free the previous rwi 2503 * and process the new reset even if previous reset failed 2504 * (the previous reset could have failed because of a fail 2505 * over for instance, so process the fail over). 2506 * 2507 * If there are no resets queued and the previous reset failed, 2508 * the adapter would be in an undefined state. So retry the 2509 * previous reset as a hard reset. 2510 */ 2511 if (rwi) 2512 kfree(tmprwi); 2513 else if (rc) 2514 rwi = tmprwi; 2515 2516 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2517 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2518 adapter->force_reset_recovery = true; 2519 } 2520 2521 if (adapter->wait_for_reset) { 2522 adapter->reset_done_rc = rc; 2523 complete(&adapter->reset_done); 2524 } 2525 2526 clear_bit_unlock(0, &adapter->resetting); 2527 2528 netdev_dbg(adapter->netdev, 2529 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2530 adapter_state_to_string(adapter->state), 2531 adapter->force_reset_recovery, 2532 adapter->wait_for_reset); 2533 } 2534 2535 static void __ibmvnic_delayed_reset(struct work_struct *work) 2536 { 2537 struct ibmvnic_adapter *adapter; 2538 2539 adapter = container_of(work, struct ibmvnic_adapter, 2540 ibmvnic_delayed_reset.work); 2541 __ibmvnic_reset(&adapter->ibmvnic_reset); 2542 } 2543 2544 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2545 enum ibmvnic_reset_reason reason) 2546 { 2547 struct list_head *entry, *tmp_entry; 2548 struct ibmvnic_rwi *rwi, *tmp; 2549 struct net_device *netdev = adapter->netdev; 2550 unsigned long flags; 2551 int ret; 2552 2553 spin_lock_irqsave(&adapter->rwi_lock, flags); 2554 2555 /* If failover is pending don't schedule any other reset. 2556 * Instead let the failover complete. If there is already a 2557 * a failover reset scheduled, we will detect and drop the 2558 * duplicate reset when walking the ->rwi_list below. 2559 */ 2560 if (adapter->state == VNIC_REMOVING || 2561 adapter->state == VNIC_REMOVED || 2562 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2563 ret = EBUSY; 2564 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2565 goto err; 2566 } 2567 2568 if (adapter->state == VNIC_PROBING) { 2569 netdev_warn(netdev, "Adapter reset during probe\n"); 2570 adapter->init_done_rc = EAGAIN; 2571 ret = EAGAIN; 2572 goto err; 2573 } 2574 2575 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2576 if (tmp->reset_reason == reason) { 2577 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2578 reset_reason_to_string(reason)); 2579 ret = EBUSY; 2580 goto err; 2581 } 2582 } 2583 2584 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2585 if (!rwi) { 2586 ret = ENOMEM; 2587 goto err; 2588 } 2589 /* if we just received a transport event, 2590 * flush reset queue and process this reset 2591 */ 2592 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2593 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2594 list_del(entry); 2595 } 2596 rwi->reset_reason = reason; 2597 list_add_tail(&rwi->list, &adapter->rwi_list); 2598 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2599 reset_reason_to_string(reason)); 2600 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2601 2602 ret = 0; 2603 err: 2604 /* ibmvnic_close() below can block, so drop the lock first */ 2605 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2606 2607 if (ret == ENOMEM) 2608 ibmvnic_close(netdev); 2609 2610 return -ret; 2611 } 2612 2613 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2614 { 2615 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2616 2617 if (test_bit(0, &adapter->resetting)) { 2618 netdev_err(adapter->netdev, 2619 "Adapter is resetting, skip timeout reset\n"); 2620 return; 2621 } 2622 /* No queuing up reset until at least 5 seconds (default watchdog val) 2623 * after last reset 2624 */ 2625 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2626 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2627 return; 2628 } 2629 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2630 } 2631 2632 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2633 struct ibmvnic_rx_buff *rx_buff) 2634 { 2635 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2636 2637 rx_buff->skb = NULL; 2638 2639 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2640 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2641 2642 atomic_dec(&pool->available); 2643 } 2644 2645 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2646 { 2647 struct ibmvnic_sub_crq_queue *rx_scrq; 2648 struct ibmvnic_adapter *adapter; 2649 struct net_device *netdev; 2650 int frames_processed; 2651 int scrq_num; 2652 2653 netdev = napi->dev; 2654 adapter = netdev_priv(netdev); 2655 scrq_num = (int)(napi - adapter->napi); 2656 frames_processed = 0; 2657 rx_scrq = adapter->rx_scrq[scrq_num]; 2658 2659 restart_poll: 2660 while (frames_processed < budget) { 2661 struct sk_buff *skb; 2662 struct ibmvnic_rx_buff *rx_buff; 2663 union sub_crq *next; 2664 u32 length; 2665 u16 offset; 2666 u8 flags = 0; 2667 2668 if (unlikely(test_bit(0, &adapter->resetting) && 2669 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2670 enable_scrq_irq(adapter, rx_scrq); 2671 napi_complete_done(napi, frames_processed); 2672 return frames_processed; 2673 } 2674 2675 if (!pending_scrq(adapter, rx_scrq)) 2676 break; 2677 next = ibmvnic_next_scrq(adapter, rx_scrq); 2678 rx_buff = (struct ibmvnic_rx_buff *) 2679 be64_to_cpu(next->rx_comp.correlator); 2680 /* do error checking */ 2681 if (next->rx_comp.rc) { 2682 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2683 be16_to_cpu(next->rx_comp.rc)); 2684 /* free the entry */ 2685 next->rx_comp.first = 0; 2686 dev_kfree_skb_any(rx_buff->skb); 2687 remove_buff_from_pool(adapter, rx_buff); 2688 continue; 2689 } else if (!rx_buff->skb) { 2690 /* free the entry */ 2691 next->rx_comp.first = 0; 2692 remove_buff_from_pool(adapter, rx_buff); 2693 continue; 2694 } 2695 2696 length = be32_to_cpu(next->rx_comp.len); 2697 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2698 flags = next->rx_comp.flags; 2699 skb = rx_buff->skb; 2700 /* load long_term_buff before copying to skb */ 2701 dma_rmb(); 2702 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2703 length); 2704 2705 /* VLAN Header has been stripped by the system firmware and 2706 * needs to be inserted by the driver 2707 */ 2708 if (adapter->rx_vlan_header_insertion && 2709 (flags & IBMVNIC_VLAN_STRIPPED)) 2710 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2711 ntohs(next->rx_comp.vlan_tci)); 2712 2713 /* free the entry */ 2714 next->rx_comp.first = 0; 2715 remove_buff_from_pool(adapter, rx_buff); 2716 2717 skb_put(skb, length); 2718 skb->protocol = eth_type_trans(skb, netdev); 2719 skb_record_rx_queue(skb, scrq_num); 2720 2721 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2722 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2723 skb->ip_summed = CHECKSUM_UNNECESSARY; 2724 } 2725 2726 length = skb->len; 2727 napi_gro_receive(napi, skb); /* send it up */ 2728 netdev->stats.rx_packets++; 2729 netdev->stats.rx_bytes += length; 2730 adapter->rx_stats_buffers[scrq_num].packets++; 2731 adapter->rx_stats_buffers[scrq_num].bytes += length; 2732 frames_processed++; 2733 } 2734 2735 if (adapter->state != VNIC_CLOSING && 2736 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2737 adapter->req_rx_add_entries_per_subcrq / 2) || 2738 frames_processed < budget)) 2739 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2740 if (frames_processed < budget) { 2741 if (napi_complete_done(napi, frames_processed)) { 2742 enable_scrq_irq(adapter, rx_scrq); 2743 if (pending_scrq(adapter, rx_scrq)) { 2744 if (napi_reschedule(napi)) { 2745 disable_scrq_irq(adapter, rx_scrq); 2746 goto restart_poll; 2747 } 2748 } 2749 } 2750 } 2751 return frames_processed; 2752 } 2753 2754 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2755 { 2756 int rc, ret; 2757 2758 adapter->fallback.mtu = adapter->req_mtu; 2759 adapter->fallback.rx_queues = adapter->req_rx_queues; 2760 adapter->fallback.tx_queues = adapter->req_tx_queues; 2761 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2762 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2763 2764 reinit_completion(&adapter->reset_done); 2765 adapter->wait_for_reset = true; 2766 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2767 2768 if (rc) { 2769 ret = rc; 2770 goto out; 2771 } 2772 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2773 if (rc) { 2774 ret = -ENODEV; 2775 goto out; 2776 } 2777 2778 ret = 0; 2779 if (adapter->reset_done_rc) { 2780 ret = -EIO; 2781 adapter->desired.mtu = adapter->fallback.mtu; 2782 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2783 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2784 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2785 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2786 2787 reinit_completion(&adapter->reset_done); 2788 adapter->wait_for_reset = true; 2789 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2790 if (rc) { 2791 ret = rc; 2792 goto out; 2793 } 2794 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2795 60000); 2796 if (rc) { 2797 ret = -ENODEV; 2798 goto out; 2799 } 2800 } 2801 out: 2802 adapter->wait_for_reset = false; 2803 2804 return ret; 2805 } 2806 2807 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2808 { 2809 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2810 2811 adapter->desired.mtu = new_mtu + ETH_HLEN; 2812 2813 return wait_for_reset(adapter); 2814 } 2815 2816 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2817 struct net_device *dev, 2818 netdev_features_t features) 2819 { 2820 /* Some backing hardware adapters can not 2821 * handle packets with a MSS less than 224 2822 * or with only one segment. 2823 */ 2824 if (skb_is_gso(skb)) { 2825 if (skb_shinfo(skb)->gso_size < 224 || 2826 skb_shinfo(skb)->gso_segs == 1) 2827 features &= ~NETIF_F_GSO_MASK; 2828 } 2829 2830 return features; 2831 } 2832 2833 static const struct net_device_ops ibmvnic_netdev_ops = { 2834 .ndo_open = ibmvnic_open, 2835 .ndo_stop = ibmvnic_close, 2836 .ndo_start_xmit = ibmvnic_xmit, 2837 .ndo_set_rx_mode = ibmvnic_set_multi, 2838 .ndo_set_mac_address = ibmvnic_set_mac, 2839 .ndo_validate_addr = eth_validate_addr, 2840 .ndo_tx_timeout = ibmvnic_tx_timeout, 2841 .ndo_change_mtu = ibmvnic_change_mtu, 2842 .ndo_features_check = ibmvnic_features_check, 2843 }; 2844 2845 /* ethtool functions */ 2846 2847 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2848 struct ethtool_link_ksettings *cmd) 2849 { 2850 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2851 int rc; 2852 2853 rc = send_query_phys_parms(adapter); 2854 if (rc) { 2855 adapter->speed = SPEED_UNKNOWN; 2856 adapter->duplex = DUPLEX_UNKNOWN; 2857 } 2858 cmd->base.speed = adapter->speed; 2859 cmd->base.duplex = adapter->duplex; 2860 cmd->base.port = PORT_FIBRE; 2861 cmd->base.phy_address = 0; 2862 cmd->base.autoneg = AUTONEG_ENABLE; 2863 2864 return 0; 2865 } 2866 2867 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2868 struct ethtool_drvinfo *info) 2869 { 2870 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2871 2872 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2873 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2874 strscpy(info->fw_version, adapter->fw_version, 2875 sizeof(info->fw_version)); 2876 } 2877 2878 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2879 { 2880 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2881 2882 return adapter->msg_enable; 2883 } 2884 2885 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2886 { 2887 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2888 2889 adapter->msg_enable = data; 2890 } 2891 2892 static u32 ibmvnic_get_link(struct net_device *netdev) 2893 { 2894 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2895 2896 /* Don't need to send a query because we request a logical link up at 2897 * init and then we wait for link state indications 2898 */ 2899 return adapter->logical_link_state; 2900 } 2901 2902 static void ibmvnic_get_ringparam(struct net_device *netdev, 2903 struct ethtool_ringparam *ring) 2904 { 2905 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2906 2907 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2908 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2909 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2910 } else { 2911 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2912 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2913 } 2914 ring->rx_mini_max_pending = 0; 2915 ring->rx_jumbo_max_pending = 0; 2916 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2917 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2918 ring->rx_mini_pending = 0; 2919 ring->rx_jumbo_pending = 0; 2920 } 2921 2922 static int ibmvnic_set_ringparam(struct net_device *netdev, 2923 struct ethtool_ringparam *ring) 2924 { 2925 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2926 int ret; 2927 2928 ret = 0; 2929 adapter->desired.rx_entries = ring->rx_pending; 2930 adapter->desired.tx_entries = ring->tx_pending; 2931 2932 ret = wait_for_reset(adapter); 2933 2934 if (!ret && 2935 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2936 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2937 netdev_info(netdev, 2938 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2939 ring->rx_pending, ring->tx_pending, 2940 adapter->req_rx_add_entries_per_subcrq, 2941 adapter->req_tx_entries_per_subcrq); 2942 return ret; 2943 } 2944 2945 static void ibmvnic_get_channels(struct net_device *netdev, 2946 struct ethtool_channels *channels) 2947 { 2948 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2949 2950 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2951 channels->max_rx = adapter->max_rx_queues; 2952 channels->max_tx = adapter->max_tx_queues; 2953 } else { 2954 channels->max_rx = IBMVNIC_MAX_QUEUES; 2955 channels->max_tx = IBMVNIC_MAX_QUEUES; 2956 } 2957 2958 channels->max_other = 0; 2959 channels->max_combined = 0; 2960 channels->rx_count = adapter->req_rx_queues; 2961 channels->tx_count = adapter->req_tx_queues; 2962 channels->other_count = 0; 2963 channels->combined_count = 0; 2964 } 2965 2966 static int ibmvnic_set_channels(struct net_device *netdev, 2967 struct ethtool_channels *channels) 2968 { 2969 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2970 int ret; 2971 2972 ret = 0; 2973 adapter->desired.rx_queues = channels->rx_count; 2974 adapter->desired.tx_queues = channels->tx_count; 2975 2976 ret = wait_for_reset(adapter); 2977 2978 if (!ret && 2979 (adapter->req_rx_queues != channels->rx_count || 2980 adapter->req_tx_queues != channels->tx_count)) 2981 netdev_info(netdev, 2982 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2983 channels->rx_count, channels->tx_count, 2984 adapter->req_rx_queues, adapter->req_tx_queues); 2985 return ret; 2986 } 2987 2988 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2989 { 2990 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2991 int i; 2992 2993 switch (stringset) { 2994 case ETH_SS_STATS: 2995 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2996 i++, data += ETH_GSTRING_LEN) 2997 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2998 2999 for (i = 0; i < adapter->req_tx_queues; i++) { 3000 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3001 data += ETH_GSTRING_LEN; 3002 3003 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3004 data += ETH_GSTRING_LEN; 3005 3006 snprintf(data, ETH_GSTRING_LEN, 3007 "tx%d_dropped_packets", i); 3008 data += ETH_GSTRING_LEN; 3009 } 3010 3011 for (i = 0; i < adapter->req_rx_queues; i++) { 3012 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3013 data += ETH_GSTRING_LEN; 3014 3015 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3016 data += ETH_GSTRING_LEN; 3017 3018 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3019 data += ETH_GSTRING_LEN; 3020 } 3021 break; 3022 3023 case ETH_SS_PRIV_FLAGS: 3024 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3025 strcpy(data + i * ETH_GSTRING_LEN, 3026 ibmvnic_priv_flags[i]); 3027 break; 3028 default: 3029 return; 3030 } 3031 } 3032 3033 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3034 { 3035 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3036 3037 switch (sset) { 3038 case ETH_SS_STATS: 3039 return ARRAY_SIZE(ibmvnic_stats) + 3040 adapter->req_tx_queues * NUM_TX_STATS + 3041 adapter->req_rx_queues * NUM_RX_STATS; 3042 case ETH_SS_PRIV_FLAGS: 3043 return ARRAY_SIZE(ibmvnic_priv_flags); 3044 default: 3045 return -EOPNOTSUPP; 3046 } 3047 } 3048 3049 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3050 struct ethtool_stats *stats, u64 *data) 3051 { 3052 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3053 union ibmvnic_crq crq; 3054 int i, j; 3055 int rc; 3056 3057 memset(&crq, 0, sizeof(crq)); 3058 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3059 crq.request_statistics.cmd = REQUEST_STATISTICS; 3060 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3061 crq.request_statistics.len = 3062 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3063 3064 /* Wait for data to be written */ 3065 reinit_completion(&adapter->stats_done); 3066 rc = ibmvnic_send_crq(adapter, &crq); 3067 if (rc) 3068 return; 3069 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3070 if (rc) 3071 return; 3072 3073 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3074 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3075 (adapter, ibmvnic_stats[i].offset)); 3076 3077 for (j = 0; j < adapter->req_tx_queues; j++) { 3078 data[i] = adapter->tx_stats_buffers[j].packets; 3079 i++; 3080 data[i] = adapter->tx_stats_buffers[j].bytes; 3081 i++; 3082 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3083 i++; 3084 } 3085 3086 for (j = 0; j < adapter->req_rx_queues; j++) { 3087 data[i] = adapter->rx_stats_buffers[j].packets; 3088 i++; 3089 data[i] = adapter->rx_stats_buffers[j].bytes; 3090 i++; 3091 data[i] = adapter->rx_stats_buffers[j].interrupts; 3092 i++; 3093 } 3094 } 3095 3096 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3097 { 3098 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3099 3100 return adapter->priv_flags; 3101 } 3102 3103 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3104 { 3105 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3106 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3107 3108 if (which_maxes) 3109 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3110 else 3111 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3112 3113 return 0; 3114 } 3115 3116 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3117 .get_drvinfo = ibmvnic_get_drvinfo, 3118 .get_msglevel = ibmvnic_get_msglevel, 3119 .set_msglevel = ibmvnic_set_msglevel, 3120 .get_link = ibmvnic_get_link, 3121 .get_ringparam = ibmvnic_get_ringparam, 3122 .set_ringparam = ibmvnic_set_ringparam, 3123 .get_channels = ibmvnic_get_channels, 3124 .set_channels = ibmvnic_set_channels, 3125 .get_strings = ibmvnic_get_strings, 3126 .get_sset_count = ibmvnic_get_sset_count, 3127 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3128 .get_link_ksettings = ibmvnic_get_link_ksettings, 3129 .get_priv_flags = ibmvnic_get_priv_flags, 3130 .set_priv_flags = ibmvnic_set_priv_flags, 3131 }; 3132 3133 /* Routines for managing CRQs/sCRQs */ 3134 3135 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3136 struct ibmvnic_sub_crq_queue *scrq) 3137 { 3138 int rc; 3139 3140 if (!scrq) { 3141 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3142 return -EINVAL; 3143 } 3144 3145 if (scrq->irq) { 3146 free_irq(scrq->irq, scrq); 3147 irq_dispose_mapping(scrq->irq); 3148 scrq->irq = 0; 3149 } 3150 3151 if (scrq->msgs) { 3152 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3153 atomic_set(&scrq->used, 0); 3154 scrq->cur = 0; 3155 scrq->ind_buf.index = 0; 3156 } else { 3157 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3158 return -EINVAL; 3159 } 3160 3161 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3162 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3163 return rc; 3164 } 3165 3166 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3167 { 3168 int i, rc; 3169 3170 if (!adapter->tx_scrq || !adapter->rx_scrq) 3171 return -EINVAL; 3172 3173 for (i = 0; i < adapter->req_tx_queues; i++) { 3174 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3175 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3176 if (rc) 3177 return rc; 3178 } 3179 3180 for (i = 0; i < adapter->req_rx_queues; i++) { 3181 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3182 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3183 if (rc) 3184 return rc; 3185 } 3186 3187 return rc; 3188 } 3189 3190 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3191 struct ibmvnic_sub_crq_queue *scrq, 3192 bool do_h_free) 3193 { 3194 struct device *dev = &adapter->vdev->dev; 3195 long rc; 3196 3197 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3198 3199 if (do_h_free) { 3200 /* Close the sub-crqs */ 3201 do { 3202 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3203 adapter->vdev->unit_address, 3204 scrq->crq_num); 3205 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3206 3207 if (rc) { 3208 netdev_err(adapter->netdev, 3209 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3210 scrq->crq_num, rc); 3211 } 3212 } 3213 3214 dma_free_coherent(dev, 3215 IBMVNIC_IND_ARR_SZ, 3216 scrq->ind_buf.indir_arr, 3217 scrq->ind_buf.indir_dma); 3218 3219 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3220 DMA_BIDIRECTIONAL); 3221 free_pages((unsigned long)scrq->msgs, 2); 3222 kfree(scrq); 3223 } 3224 3225 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3226 *adapter) 3227 { 3228 struct device *dev = &adapter->vdev->dev; 3229 struct ibmvnic_sub_crq_queue *scrq; 3230 int rc; 3231 3232 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3233 if (!scrq) 3234 return NULL; 3235 3236 scrq->msgs = 3237 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3238 if (!scrq->msgs) { 3239 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3240 goto zero_page_failed; 3241 } 3242 3243 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3244 DMA_BIDIRECTIONAL); 3245 if (dma_mapping_error(dev, scrq->msg_token)) { 3246 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3247 goto map_failed; 3248 } 3249 3250 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3251 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3252 3253 if (rc == H_RESOURCE) 3254 rc = ibmvnic_reset_crq(adapter); 3255 3256 if (rc == H_CLOSED) { 3257 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3258 } else if (rc) { 3259 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3260 goto reg_failed; 3261 } 3262 3263 scrq->adapter = adapter; 3264 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3265 scrq->ind_buf.index = 0; 3266 3267 scrq->ind_buf.indir_arr = 3268 dma_alloc_coherent(dev, 3269 IBMVNIC_IND_ARR_SZ, 3270 &scrq->ind_buf.indir_dma, 3271 GFP_KERNEL); 3272 3273 if (!scrq->ind_buf.indir_arr) 3274 goto indir_failed; 3275 3276 spin_lock_init(&scrq->lock); 3277 3278 netdev_dbg(adapter->netdev, 3279 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3280 scrq->crq_num, scrq->hw_irq, scrq->irq); 3281 3282 return scrq; 3283 3284 indir_failed: 3285 do { 3286 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3287 adapter->vdev->unit_address, 3288 scrq->crq_num); 3289 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3290 reg_failed: 3291 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3292 DMA_BIDIRECTIONAL); 3293 map_failed: 3294 free_pages((unsigned long)scrq->msgs, 2); 3295 zero_page_failed: 3296 kfree(scrq); 3297 3298 return NULL; 3299 } 3300 3301 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3302 { 3303 int i; 3304 3305 if (adapter->tx_scrq) { 3306 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3307 if (!adapter->tx_scrq[i]) 3308 continue; 3309 3310 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3311 i); 3312 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3313 if (adapter->tx_scrq[i]->irq) { 3314 free_irq(adapter->tx_scrq[i]->irq, 3315 adapter->tx_scrq[i]); 3316 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3317 adapter->tx_scrq[i]->irq = 0; 3318 } 3319 3320 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3321 do_h_free); 3322 } 3323 3324 kfree(adapter->tx_scrq); 3325 adapter->tx_scrq = NULL; 3326 adapter->num_active_tx_scrqs = 0; 3327 } 3328 3329 if (adapter->rx_scrq) { 3330 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3331 if (!adapter->rx_scrq[i]) 3332 continue; 3333 3334 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3335 i); 3336 if (adapter->rx_scrq[i]->irq) { 3337 free_irq(adapter->rx_scrq[i]->irq, 3338 adapter->rx_scrq[i]); 3339 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3340 adapter->rx_scrq[i]->irq = 0; 3341 } 3342 3343 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3344 do_h_free); 3345 } 3346 3347 kfree(adapter->rx_scrq); 3348 adapter->rx_scrq = NULL; 3349 adapter->num_active_rx_scrqs = 0; 3350 } 3351 } 3352 3353 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3354 struct ibmvnic_sub_crq_queue *scrq) 3355 { 3356 struct device *dev = &adapter->vdev->dev; 3357 unsigned long rc; 3358 3359 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3360 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3361 if (rc) 3362 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3363 scrq->hw_irq, rc); 3364 return rc; 3365 } 3366 3367 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3368 struct ibmvnic_sub_crq_queue *scrq) 3369 { 3370 struct device *dev = &adapter->vdev->dev; 3371 unsigned long rc; 3372 3373 if (scrq->hw_irq > 0x100000000ULL) { 3374 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3375 return 1; 3376 } 3377 3378 if (test_bit(0, &adapter->resetting) && 3379 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3380 u64 val = (0xff000000) | scrq->hw_irq; 3381 3382 rc = plpar_hcall_norets(H_EOI, val); 3383 /* H_EOI would fail with rc = H_FUNCTION when running 3384 * in XIVE mode which is expected, but not an error. 3385 */ 3386 if (rc && (rc != H_FUNCTION)) 3387 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3388 val, rc); 3389 } 3390 3391 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3392 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3393 if (rc) 3394 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3395 scrq->hw_irq, rc); 3396 return rc; 3397 } 3398 3399 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3400 struct ibmvnic_sub_crq_queue *scrq) 3401 { 3402 struct device *dev = &adapter->vdev->dev; 3403 struct ibmvnic_tx_pool *tx_pool; 3404 struct ibmvnic_tx_buff *txbuff; 3405 struct netdev_queue *txq; 3406 union sub_crq *next; 3407 int index; 3408 int i; 3409 3410 restart_loop: 3411 while (pending_scrq(adapter, scrq)) { 3412 unsigned int pool = scrq->pool_index; 3413 int num_entries = 0; 3414 int total_bytes = 0; 3415 int num_packets = 0; 3416 3417 next = ibmvnic_next_scrq(adapter, scrq); 3418 for (i = 0; i < next->tx_comp.num_comps; i++) { 3419 index = be32_to_cpu(next->tx_comp.correlators[i]); 3420 if (index & IBMVNIC_TSO_POOL_MASK) { 3421 tx_pool = &adapter->tso_pool[pool]; 3422 index &= ~IBMVNIC_TSO_POOL_MASK; 3423 } else { 3424 tx_pool = &adapter->tx_pool[pool]; 3425 } 3426 3427 txbuff = &tx_pool->tx_buff[index]; 3428 num_packets++; 3429 num_entries += txbuff->num_entries; 3430 if (txbuff->skb) { 3431 total_bytes += txbuff->skb->len; 3432 if (next->tx_comp.rcs[i]) { 3433 dev_err(dev, "tx error %x\n", 3434 next->tx_comp.rcs[i]); 3435 dev_kfree_skb_irq(txbuff->skb); 3436 } else { 3437 dev_consume_skb_irq(txbuff->skb); 3438 } 3439 txbuff->skb = NULL; 3440 } else { 3441 netdev_warn(adapter->netdev, 3442 "TX completion received with NULL socket buffer\n"); 3443 } 3444 tx_pool->free_map[tx_pool->producer_index] = index; 3445 tx_pool->producer_index = 3446 (tx_pool->producer_index + 1) % 3447 tx_pool->num_buffers; 3448 } 3449 /* remove tx_comp scrq*/ 3450 next->tx_comp.first = 0; 3451 3452 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3453 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3454 3455 if (atomic_sub_return(num_entries, &scrq->used) <= 3456 (adapter->req_tx_entries_per_subcrq / 2) && 3457 __netif_subqueue_stopped(adapter->netdev, 3458 scrq->pool_index)) { 3459 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3460 netdev_dbg(adapter->netdev, "Started queue %d\n", 3461 scrq->pool_index); 3462 } 3463 } 3464 3465 enable_scrq_irq(adapter, scrq); 3466 3467 if (pending_scrq(adapter, scrq)) { 3468 disable_scrq_irq(adapter, scrq); 3469 goto restart_loop; 3470 } 3471 3472 return 0; 3473 } 3474 3475 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3476 { 3477 struct ibmvnic_sub_crq_queue *scrq = instance; 3478 struct ibmvnic_adapter *adapter = scrq->adapter; 3479 3480 disable_scrq_irq(adapter, scrq); 3481 ibmvnic_complete_tx(adapter, scrq); 3482 3483 return IRQ_HANDLED; 3484 } 3485 3486 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3487 { 3488 struct ibmvnic_sub_crq_queue *scrq = instance; 3489 struct ibmvnic_adapter *adapter = scrq->adapter; 3490 3491 /* When booting a kdump kernel we can hit pending interrupts 3492 * prior to completing driver initialization. 3493 */ 3494 if (unlikely(adapter->state != VNIC_OPEN)) 3495 return IRQ_NONE; 3496 3497 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3498 3499 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3500 disable_scrq_irq(adapter, scrq); 3501 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3502 } 3503 3504 return IRQ_HANDLED; 3505 } 3506 3507 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3508 { 3509 struct device *dev = &adapter->vdev->dev; 3510 struct ibmvnic_sub_crq_queue *scrq; 3511 int i = 0, j = 0; 3512 int rc = 0; 3513 3514 for (i = 0; i < adapter->req_tx_queues; i++) { 3515 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3516 i); 3517 scrq = adapter->tx_scrq[i]; 3518 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3519 3520 if (!scrq->irq) { 3521 rc = -EINVAL; 3522 dev_err(dev, "Error mapping irq\n"); 3523 goto req_tx_irq_failed; 3524 } 3525 3526 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3527 adapter->vdev->unit_address, i); 3528 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3529 0, scrq->name, scrq); 3530 3531 if (rc) { 3532 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3533 scrq->irq, rc); 3534 irq_dispose_mapping(scrq->irq); 3535 goto req_tx_irq_failed; 3536 } 3537 } 3538 3539 for (i = 0; i < adapter->req_rx_queues; i++) { 3540 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3541 i); 3542 scrq = adapter->rx_scrq[i]; 3543 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3544 if (!scrq->irq) { 3545 rc = -EINVAL; 3546 dev_err(dev, "Error mapping irq\n"); 3547 goto req_rx_irq_failed; 3548 } 3549 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3550 adapter->vdev->unit_address, i); 3551 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3552 0, scrq->name, scrq); 3553 if (rc) { 3554 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3555 scrq->irq, rc); 3556 irq_dispose_mapping(scrq->irq); 3557 goto req_rx_irq_failed; 3558 } 3559 } 3560 return rc; 3561 3562 req_rx_irq_failed: 3563 for (j = 0; j < i; j++) { 3564 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3565 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3566 } 3567 i = adapter->req_tx_queues; 3568 req_tx_irq_failed: 3569 for (j = 0; j < i; j++) { 3570 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3571 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3572 } 3573 release_sub_crqs(adapter, 1); 3574 return rc; 3575 } 3576 3577 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3578 { 3579 struct device *dev = &adapter->vdev->dev; 3580 struct ibmvnic_sub_crq_queue **allqueues; 3581 int registered_queues = 0; 3582 int total_queues; 3583 int more = 0; 3584 int i; 3585 3586 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3587 3588 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3589 if (!allqueues) 3590 return -1; 3591 3592 for (i = 0; i < total_queues; i++) { 3593 allqueues[i] = init_sub_crq_queue(adapter); 3594 if (!allqueues[i]) { 3595 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3596 break; 3597 } 3598 registered_queues++; 3599 } 3600 3601 /* Make sure we were able to register the minimum number of queues */ 3602 if (registered_queues < 3603 adapter->min_tx_queues + adapter->min_rx_queues) { 3604 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3605 goto tx_failed; 3606 } 3607 3608 /* Distribute the failed allocated queues*/ 3609 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3610 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3611 switch (i % 3) { 3612 case 0: 3613 if (adapter->req_rx_queues > adapter->min_rx_queues) 3614 adapter->req_rx_queues--; 3615 else 3616 more++; 3617 break; 3618 case 1: 3619 if (adapter->req_tx_queues > adapter->min_tx_queues) 3620 adapter->req_tx_queues--; 3621 else 3622 more++; 3623 break; 3624 } 3625 } 3626 3627 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3628 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3629 if (!adapter->tx_scrq) 3630 goto tx_failed; 3631 3632 for (i = 0; i < adapter->req_tx_queues; i++) { 3633 adapter->tx_scrq[i] = allqueues[i]; 3634 adapter->tx_scrq[i]->pool_index = i; 3635 adapter->num_active_tx_scrqs++; 3636 } 3637 3638 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3639 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3640 if (!adapter->rx_scrq) 3641 goto rx_failed; 3642 3643 for (i = 0; i < adapter->req_rx_queues; i++) { 3644 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3645 adapter->rx_scrq[i]->scrq_num = i; 3646 adapter->num_active_rx_scrqs++; 3647 } 3648 3649 kfree(allqueues); 3650 return 0; 3651 3652 rx_failed: 3653 kfree(adapter->tx_scrq); 3654 adapter->tx_scrq = NULL; 3655 tx_failed: 3656 for (i = 0; i < registered_queues; i++) 3657 release_sub_crq_queue(adapter, allqueues[i], 1); 3658 kfree(allqueues); 3659 return -1; 3660 } 3661 3662 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3663 { 3664 struct device *dev = &adapter->vdev->dev; 3665 union ibmvnic_crq crq; 3666 int max_entries; 3667 3668 if (!retry) { 3669 /* Sub-CRQ entries are 32 byte long */ 3670 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3671 3672 if (adapter->min_tx_entries_per_subcrq > entries_page || 3673 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3674 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3675 return; 3676 } 3677 3678 if (adapter->desired.mtu) 3679 adapter->req_mtu = adapter->desired.mtu; 3680 else 3681 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3682 3683 if (!adapter->desired.tx_entries) 3684 adapter->desired.tx_entries = 3685 adapter->max_tx_entries_per_subcrq; 3686 if (!adapter->desired.rx_entries) 3687 adapter->desired.rx_entries = 3688 adapter->max_rx_add_entries_per_subcrq; 3689 3690 max_entries = IBMVNIC_MAX_LTB_SIZE / 3691 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3692 3693 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3694 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3695 adapter->desired.tx_entries = max_entries; 3696 } 3697 3698 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3699 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3700 adapter->desired.rx_entries = max_entries; 3701 } 3702 3703 if (adapter->desired.tx_entries) 3704 adapter->req_tx_entries_per_subcrq = 3705 adapter->desired.tx_entries; 3706 else 3707 adapter->req_tx_entries_per_subcrq = 3708 adapter->max_tx_entries_per_subcrq; 3709 3710 if (adapter->desired.rx_entries) 3711 adapter->req_rx_add_entries_per_subcrq = 3712 adapter->desired.rx_entries; 3713 else 3714 adapter->req_rx_add_entries_per_subcrq = 3715 adapter->max_rx_add_entries_per_subcrq; 3716 3717 if (adapter->desired.tx_queues) 3718 adapter->req_tx_queues = 3719 adapter->desired.tx_queues; 3720 else 3721 adapter->req_tx_queues = 3722 adapter->opt_tx_comp_sub_queues; 3723 3724 if (adapter->desired.rx_queues) 3725 adapter->req_rx_queues = 3726 adapter->desired.rx_queues; 3727 else 3728 adapter->req_rx_queues = 3729 adapter->opt_rx_comp_queues; 3730 3731 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3732 } 3733 3734 memset(&crq, 0, sizeof(crq)); 3735 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3736 crq.request_capability.cmd = REQUEST_CAPABILITY; 3737 3738 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3739 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3740 atomic_inc(&adapter->running_cap_crqs); 3741 ibmvnic_send_crq(adapter, &crq); 3742 3743 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3744 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3745 atomic_inc(&adapter->running_cap_crqs); 3746 ibmvnic_send_crq(adapter, &crq); 3747 3748 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3749 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3750 atomic_inc(&adapter->running_cap_crqs); 3751 ibmvnic_send_crq(adapter, &crq); 3752 3753 crq.request_capability.capability = 3754 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3755 crq.request_capability.number = 3756 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3757 atomic_inc(&adapter->running_cap_crqs); 3758 ibmvnic_send_crq(adapter, &crq); 3759 3760 crq.request_capability.capability = 3761 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3762 crq.request_capability.number = 3763 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3764 atomic_inc(&adapter->running_cap_crqs); 3765 ibmvnic_send_crq(adapter, &crq); 3766 3767 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3768 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3769 atomic_inc(&adapter->running_cap_crqs); 3770 ibmvnic_send_crq(adapter, &crq); 3771 3772 if (adapter->netdev->flags & IFF_PROMISC) { 3773 if (adapter->promisc_supported) { 3774 crq.request_capability.capability = 3775 cpu_to_be16(PROMISC_REQUESTED); 3776 crq.request_capability.number = cpu_to_be64(1); 3777 atomic_inc(&adapter->running_cap_crqs); 3778 ibmvnic_send_crq(adapter, &crq); 3779 } 3780 } else { 3781 crq.request_capability.capability = 3782 cpu_to_be16(PROMISC_REQUESTED); 3783 crq.request_capability.number = cpu_to_be64(0); 3784 atomic_inc(&adapter->running_cap_crqs); 3785 ibmvnic_send_crq(adapter, &crq); 3786 } 3787 } 3788 3789 static int pending_scrq(struct ibmvnic_adapter *adapter, 3790 struct ibmvnic_sub_crq_queue *scrq) 3791 { 3792 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3793 int rc; 3794 3795 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3796 3797 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3798 * contents of the SCRQ descriptor 3799 */ 3800 dma_rmb(); 3801 3802 return rc; 3803 } 3804 3805 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3806 struct ibmvnic_sub_crq_queue *scrq) 3807 { 3808 union sub_crq *entry; 3809 unsigned long flags; 3810 3811 spin_lock_irqsave(&scrq->lock, flags); 3812 entry = &scrq->msgs[scrq->cur]; 3813 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3814 if (++scrq->cur == scrq->size) 3815 scrq->cur = 0; 3816 } else { 3817 entry = NULL; 3818 } 3819 spin_unlock_irqrestore(&scrq->lock, flags); 3820 3821 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3822 * contents of the SCRQ descriptor 3823 */ 3824 dma_rmb(); 3825 3826 return entry; 3827 } 3828 3829 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3830 { 3831 struct ibmvnic_crq_queue *queue = &adapter->crq; 3832 union ibmvnic_crq *crq; 3833 3834 crq = &queue->msgs[queue->cur]; 3835 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3836 if (++queue->cur == queue->size) 3837 queue->cur = 0; 3838 } else { 3839 crq = NULL; 3840 } 3841 3842 return crq; 3843 } 3844 3845 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3846 { 3847 switch (rc) { 3848 case H_PARAMETER: 3849 dev_warn_ratelimited(dev, 3850 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3851 func, rc); 3852 break; 3853 case H_CLOSED: 3854 dev_warn_ratelimited(dev, 3855 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3856 func, rc); 3857 break; 3858 default: 3859 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3860 break; 3861 } 3862 } 3863 3864 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3865 u64 remote_handle, u64 ioba, u64 num_entries) 3866 { 3867 unsigned int ua = adapter->vdev->unit_address; 3868 struct device *dev = &adapter->vdev->dev; 3869 int rc; 3870 3871 /* Make sure the hypervisor sees the complete request */ 3872 dma_wmb(); 3873 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3874 cpu_to_be64(remote_handle), 3875 ioba, num_entries); 3876 3877 if (rc) 3878 print_subcrq_error(dev, rc, __func__); 3879 3880 return rc; 3881 } 3882 3883 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3884 union ibmvnic_crq *crq) 3885 { 3886 unsigned int ua = adapter->vdev->unit_address; 3887 struct device *dev = &adapter->vdev->dev; 3888 u64 *u64_crq = (u64 *)crq; 3889 int rc; 3890 3891 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3892 (unsigned long)cpu_to_be64(u64_crq[0]), 3893 (unsigned long)cpu_to_be64(u64_crq[1])); 3894 3895 if (!adapter->crq.active && 3896 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3897 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3898 return -EINVAL; 3899 } 3900 3901 /* Make sure the hypervisor sees the complete request */ 3902 dma_wmb(); 3903 3904 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3905 cpu_to_be64(u64_crq[0]), 3906 cpu_to_be64(u64_crq[1])); 3907 3908 if (rc) { 3909 if (rc == H_CLOSED) { 3910 dev_warn(dev, "CRQ Queue closed\n"); 3911 /* do not reset, report the fail, wait for passive init from server */ 3912 } 3913 3914 dev_warn(dev, "Send error (rc=%d)\n", rc); 3915 } 3916 3917 return rc; 3918 } 3919 3920 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3921 { 3922 struct device *dev = &adapter->vdev->dev; 3923 union ibmvnic_crq crq; 3924 int retries = 100; 3925 int rc; 3926 3927 memset(&crq, 0, sizeof(crq)); 3928 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3929 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3930 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3931 3932 do { 3933 rc = ibmvnic_send_crq(adapter, &crq); 3934 if (rc != H_CLOSED) 3935 break; 3936 retries--; 3937 msleep(50); 3938 3939 } while (retries > 0); 3940 3941 if (rc) { 3942 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3943 return rc; 3944 } 3945 3946 return 0; 3947 } 3948 3949 struct vnic_login_client_data { 3950 u8 type; 3951 __be16 len; 3952 char name[]; 3953 } __packed; 3954 3955 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3956 { 3957 int len; 3958 3959 /* Calculate the amount of buffer space needed for the 3960 * vnic client data in the login buffer. There are four entries, 3961 * OS name, LPAR name, device name, and a null last entry. 3962 */ 3963 len = 4 * sizeof(struct vnic_login_client_data); 3964 len += 6; /* "Linux" plus NULL */ 3965 len += strlen(utsname()->nodename) + 1; 3966 len += strlen(adapter->netdev->name) + 1; 3967 3968 return len; 3969 } 3970 3971 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3972 struct vnic_login_client_data *vlcd) 3973 { 3974 const char *os_name = "Linux"; 3975 int len; 3976 3977 /* Type 1 - LPAR OS */ 3978 vlcd->type = 1; 3979 len = strlen(os_name) + 1; 3980 vlcd->len = cpu_to_be16(len); 3981 strscpy(vlcd->name, os_name, len); 3982 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3983 3984 /* Type 2 - LPAR name */ 3985 vlcd->type = 2; 3986 len = strlen(utsname()->nodename) + 1; 3987 vlcd->len = cpu_to_be16(len); 3988 strscpy(vlcd->name, utsname()->nodename, len); 3989 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3990 3991 /* Type 3 - device name */ 3992 vlcd->type = 3; 3993 len = strlen(adapter->netdev->name) + 1; 3994 vlcd->len = cpu_to_be16(len); 3995 strscpy(vlcd->name, adapter->netdev->name, len); 3996 } 3997 3998 static int send_login(struct ibmvnic_adapter *adapter) 3999 { 4000 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4001 struct ibmvnic_login_buffer *login_buffer; 4002 struct device *dev = &adapter->vdev->dev; 4003 struct vnic_login_client_data *vlcd; 4004 dma_addr_t rsp_buffer_token; 4005 dma_addr_t buffer_token; 4006 size_t rsp_buffer_size; 4007 union ibmvnic_crq crq; 4008 int client_data_len; 4009 size_t buffer_size; 4010 __be64 *tx_list_p; 4011 __be64 *rx_list_p; 4012 int rc; 4013 int i; 4014 4015 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4016 netdev_err(adapter->netdev, 4017 "RX or TX queues are not allocated, device login failed\n"); 4018 return -1; 4019 } 4020 4021 release_login_buffer(adapter); 4022 release_login_rsp_buffer(adapter); 4023 4024 client_data_len = vnic_client_data_len(adapter); 4025 4026 buffer_size = 4027 sizeof(struct ibmvnic_login_buffer) + 4028 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4029 client_data_len; 4030 4031 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4032 if (!login_buffer) 4033 goto buf_alloc_failed; 4034 4035 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4036 DMA_TO_DEVICE); 4037 if (dma_mapping_error(dev, buffer_token)) { 4038 dev_err(dev, "Couldn't map login buffer\n"); 4039 goto buf_map_failed; 4040 } 4041 4042 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4043 sizeof(u64) * adapter->req_tx_queues + 4044 sizeof(u64) * adapter->req_rx_queues + 4045 sizeof(u64) * adapter->req_rx_queues + 4046 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4047 4048 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4049 if (!login_rsp_buffer) 4050 goto buf_rsp_alloc_failed; 4051 4052 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4053 rsp_buffer_size, DMA_FROM_DEVICE); 4054 if (dma_mapping_error(dev, rsp_buffer_token)) { 4055 dev_err(dev, "Couldn't map login rsp buffer\n"); 4056 goto buf_rsp_map_failed; 4057 } 4058 4059 adapter->login_buf = login_buffer; 4060 adapter->login_buf_token = buffer_token; 4061 adapter->login_buf_sz = buffer_size; 4062 adapter->login_rsp_buf = login_rsp_buffer; 4063 adapter->login_rsp_buf_token = rsp_buffer_token; 4064 adapter->login_rsp_buf_sz = rsp_buffer_size; 4065 4066 login_buffer->len = cpu_to_be32(buffer_size); 4067 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4068 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4069 login_buffer->off_txcomp_subcrqs = 4070 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4071 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4072 login_buffer->off_rxcomp_subcrqs = 4073 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4074 sizeof(u64) * adapter->req_tx_queues); 4075 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4076 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4077 4078 tx_list_p = (__be64 *)((char *)login_buffer + 4079 sizeof(struct ibmvnic_login_buffer)); 4080 rx_list_p = (__be64 *)((char *)login_buffer + 4081 sizeof(struct ibmvnic_login_buffer) + 4082 sizeof(u64) * adapter->req_tx_queues); 4083 4084 for (i = 0; i < adapter->req_tx_queues; i++) { 4085 if (adapter->tx_scrq[i]) { 4086 tx_list_p[i] = 4087 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4088 } 4089 } 4090 4091 for (i = 0; i < adapter->req_rx_queues; i++) { 4092 if (adapter->rx_scrq[i]) { 4093 rx_list_p[i] = 4094 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4095 } 4096 } 4097 4098 /* Insert vNIC login client data */ 4099 vlcd = (struct vnic_login_client_data *) 4100 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4101 login_buffer->client_data_offset = 4102 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4103 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4104 4105 vnic_add_client_data(adapter, vlcd); 4106 4107 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4108 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4109 netdev_dbg(adapter->netdev, "%016lx\n", 4110 ((unsigned long *)(adapter->login_buf))[i]); 4111 } 4112 4113 memset(&crq, 0, sizeof(crq)); 4114 crq.login.first = IBMVNIC_CRQ_CMD; 4115 crq.login.cmd = LOGIN; 4116 crq.login.ioba = cpu_to_be32(buffer_token); 4117 crq.login.len = cpu_to_be32(buffer_size); 4118 4119 adapter->login_pending = true; 4120 rc = ibmvnic_send_crq(adapter, &crq); 4121 if (rc) { 4122 adapter->login_pending = false; 4123 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4124 goto buf_rsp_map_failed; 4125 } 4126 4127 return 0; 4128 4129 buf_rsp_map_failed: 4130 kfree(login_rsp_buffer); 4131 adapter->login_rsp_buf = NULL; 4132 buf_rsp_alloc_failed: 4133 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4134 buf_map_failed: 4135 kfree(login_buffer); 4136 adapter->login_buf = NULL; 4137 buf_alloc_failed: 4138 return -1; 4139 } 4140 4141 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4142 u32 len, u8 map_id) 4143 { 4144 union ibmvnic_crq crq; 4145 4146 memset(&crq, 0, sizeof(crq)); 4147 crq.request_map.first = IBMVNIC_CRQ_CMD; 4148 crq.request_map.cmd = REQUEST_MAP; 4149 crq.request_map.map_id = map_id; 4150 crq.request_map.ioba = cpu_to_be32(addr); 4151 crq.request_map.len = cpu_to_be32(len); 4152 return ibmvnic_send_crq(adapter, &crq); 4153 } 4154 4155 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4156 { 4157 union ibmvnic_crq crq; 4158 4159 memset(&crq, 0, sizeof(crq)); 4160 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4161 crq.request_unmap.cmd = REQUEST_UNMAP; 4162 crq.request_unmap.map_id = map_id; 4163 return ibmvnic_send_crq(adapter, &crq); 4164 } 4165 4166 static void send_query_map(struct ibmvnic_adapter *adapter) 4167 { 4168 union ibmvnic_crq crq; 4169 4170 memset(&crq, 0, sizeof(crq)); 4171 crq.query_map.first = IBMVNIC_CRQ_CMD; 4172 crq.query_map.cmd = QUERY_MAP; 4173 ibmvnic_send_crq(adapter, &crq); 4174 } 4175 4176 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4177 static void send_query_cap(struct ibmvnic_adapter *adapter) 4178 { 4179 union ibmvnic_crq crq; 4180 4181 atomic_set(&adapter->running_cap_crqs, 0); 4182 memset(&crq, 0, sizeof(crq)); 4183 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4184 crq.query_capability.cmd = QUERY_CAPABILITY; 4185 4186 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4187 atomic_inc(&adapter->running_cap_crqs); 4188 ibmvnic_send_crq(adapter, &crq); 4189 4190 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4191 atomic_inc(&adapter->running_cap_crqs); 4192 ibmvnic_send_crq(adapter, &crq); 4193 4194 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4195 atomic_inc(&adapter->running_cap_crqs); 4196 ibmvnic_send_crq(adapter, &crq); 4197 4198 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4199 atomic_inc(&adapter->running_cap_crqs); 4200 ibmvnic_send_crq(adapter, &crq); 4201 4202 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4203 atomic_inc(&adapter->running_cap_crqs); 4204 ibmvnic_send_crq(adapter, &crq); 4205 4206 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4207 atomic_inc(&adapter->running_cap_crqs); 4208 ibmvnic_send_crq(adapter, &crq); 4209 4210 crq.query_capability.capability = 4211 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4212 atomic_inc(&adapter->running_cap_crqs); 4213 ibmvnic_send_crq(adapter, &crq); 4214 4215 crq.query_capability.capability = 4216 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4217 atomic_inc(&adapter->running_cap_crqs); 4218 ibmvnic_send_crq(adapter, &crq); 4219 4220 crq.query_capability.capability = 4221 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4222 atomic_inc(&adapter->running_cap_crqs); 4223 ibmvnic_send_crq(adapter, &crq); 4224 4225 crq.query_capability.capability = 4226 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4227 atomic_inc(&adapter->running_cap_crqs); 4228 ibmvnic_send_crq(adapter, &crq); 4229 4230 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4231 atomic_inc(&adapter->running_cap_crqs); 4232 ibmvnic_send_crq(adapter, &crq); 4233 4234 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4235 atomic_inc(&adapter->running_cap_crqs); 4236 ibmvnic_send_crq(adapter, &crq); 4237 4238 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4239 atomic_inc(&adapter->running_cap_crqs); 4240 ibmvnic_send_crq(adapter, &crq); 4241 4242 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4243 atomic_inc(&adapter->running_cap_crqs); 4244 ibmvnic_send_crq(adapter, &crq); 4245 4246 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4247 atomic_inc(&adapter->running_cap_crqs); 4248 ibmvnic_send_crq(adapter, &crq); 4249 4250 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4251 atomic_inc(&adapter->running_cap_crqs); 4252 ibmvnic_send_crq(adapter, &crq); 4253 4254 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4255 atomic_inc(&adapter->running_cap_crqs); 4256 ibmvnic_send_crq(adapter, &crq); 4257 4258 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4259 atomic_inc(&adapter->running_cap_crqs); 4260 ibmvnic_send_crq(adapter, &crq); 4261 4262 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4263 atomic_inc(&adapter->running_cap_crqs); 4264 ibmvnic_send_crq(adapter, &crq); 4265 4266 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4267 atomic_inc(&adapter->running_cap_crqs); 4268 ibmvnic_send_crq(adapter, &crq); 4269 4270 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4271 atomic_inc(&adapter->running_cap_crqs); 4272 ibmvnic_send_crq(adapter, &crq); 4273 4274 crq.query_capability.capability = 4275 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4276 atomic_inc(&adapter->running_cap_crqs); 4277 ibmvnic_send_crq(adapter, &crq); 4278 4279 crq.query_capability.capability = 4280 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4281 atomic_inc(&adapter->running_cap_crqs); 4282 ibmvnic_send_crq(adapter, &crq); 4283 4284 crq.query_capability.capability = 4285 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4286 atomic_inc(&adapter->running_cap_crqs); 4287 ibmvnic_send_crq(adapter, &crq); 4288 4289 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4290 atomic_inc(&adapter->running_cap_crqs); 4291 ibmvnic_send_crq(adapter, &crq); 4292 } 4293 4294 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4295 { 4296 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4297 struct device *dev = &adapter->vdev->dev; 4298 union ibmvnic_crq crq; 4299 4300 adapter->ip_offload_tok = 4301 dma_map_single(dev, 4302 &adapter->ip_offload_buf, 4303 buf_sz, 4304 DMA_FROM_DEVICE); 4305 4306 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4307 if (!firmware_has_feature(FW_FEATURE_CMO)) 4308 dev_err(dev, "Couldn't map offload buffer\n"); 4309 return; 4310 } 4311 4312 memset(&crq, 0, sizeof(crq)); 4313 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4314 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4315 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4316 crq.query_ip_offload.ioba = 4317 cpu_to_be32(adapter->ip_offload_tok); 4318 4319 ibmvnic_send_crq(adapter, &crq); 4320 } 4321 4322 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4323 { 4324 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4325 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4326 struct device *dev = &adapter->vdev->dev; 4327 netdev_features_t old_hw_features = 0; 4328 union ibmvnic_crq crq; 4329 4330 adapter->ip_offload_ctrl_tok = 4331 dma_map_single(dev, 4332 ctrl_buf, 4333 sizeof(adapter->ip_offload_ctrl), 4334 DMA_TO_DEVICE); 4335 4336 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4337 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4338 return; 4339 } 4340 4341 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4342 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4343 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4344 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4345 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4346 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4347 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4348 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4349 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4350 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4351 4352 /* large_rx disabled for now, additional features needed */ 4353 ctrl_buf->large_rx_ipv4 = 0; 4354 ctrl_buf->large_rx_ipv6 = 0; 4355 4356 if (adapter->state != VNIC_PROBING) { 4357 old_hw_features = adapter->netdev->hw_features; 4358 adapter->netdev->hw_features = 0; 4359 } 4360 4361 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4362 4363 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4364 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4365 4366 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4367 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4368 4369 if ((adapter->netdev->features & 4370 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4371 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4372 4373 if (buf->large_tx_ipv4) 4374 adapter->netdev->hw_features |= NETIF_F_TSO; 4375 if (buf->large_tx_ipv6) 4376 adapter->netdev->hw_features |= NETIF_F_TSO6; 4377 4378 if (adapter->state == VNIC_PROBING) { 4379 adapter->netdev->features |= adapter->netdev->hw_features; 4380 } else if (old_hw_features != adapter->netdev->hw_features) { 4381 netdev_features_t tmp = 0; 4382 4383 /* disable features no longer supported */ 4384 adapter->netdev->features &= adapter->netdev->hw_features; 4385 /* turn on features now supported if previously enabled */ 4386 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4387 adapter->netdev->hw_features; 4388 adapter->netdev->features |= 4389 tmp & adapter->netdev->wanted_features; 4390 } 4391 4392 memset(&crq, 0, sizeof(crq)); 4393 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4394 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4395 crq.control_ip_offload.len = 4396 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4397 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4398 ibmvnic_send_crq(adapter, &crq); 4399 } 4400 4401 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4402 struct ibmvnic_adapter *adapter) 4403 { 4404 struct device *dev = &adapter->vdev->dev; 4405 4406 if (crq->get_vpd_size_rsp.rc.code) { 4407 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4408 crq->get_vpd_size_rsp.rc.code); 4409 complete(&adapter->fw_done); 4410 return; 4411 } 4412 4413 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4414 complete(&adapter->fw_done); 4415 } 4416 4417 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4418 struct ibmvnic_adapter *adapter) 4419 { 4420 struct device *dev = &adapter->vdev->dev; 4421 unsigned char *substr = NULL; 4422 u8 fw_level_len = 0; 4423 4424 memset(adapter->fw_version, 0, 32); 4425 4426 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4427 DMA_FROM_DEVICE); 4428 4429 if (crq->get_vpd_rsp.rc.code) { 4430 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4431 crq->get_vpd_rsp.rc.code); 4432 goto complete; 4433 } 4434 4435 /* get the position of the firmware version info 4436 * located after the ASCII 'RM' substring in the buffer 4437 */ 4438 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4439 if (!substr) { 4440 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4441 goto complete; 4442 } 4443 4444 /* get length of firmware level ASCII substring */ 4445 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4446 fw_level_len = *(substr + 2); 4447 } else { 4448 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4449 goto complete; 4450 } 4451 4452 /* copy firmware version string from vpd into adapter */ 4453 if ((substr + 3 + fw_level_len) < 4454 (adapter->vpd->buff + adapter->vpd->len)) { 4455 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4456 } else { 4457 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4458 } 4459 4460 complete: 4461 if (adapter->fw_version[0] == '\0') 4462 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4463 complete(&adapter->fw_done); 4464 } 4465 4466 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4467 { 4468 struct device *dev = &adapter->vdev->dev; 4469 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4470 int i; 4471 4472 dma_unmap_single(dev, adapter->ip_offload_tok, 4473 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4474 4475 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4476 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4477 netdev_dbg(adapter->netdev, "%016lx\n", 4478 ((unsigned long *)(buf))[i]); 4479 4480 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4481 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4482 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4483 buf->tcp_ipv4_chksum); 4484 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4485 buf->tcp_ipv6_chksum); 4486 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4487 buf->udp_ipv4_chksum); 4488 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4489 buf->udp_ipv6_chksum); 4490 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4491 buf->large_tx_ipv4); 4492 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4493 buf->large_tx_ipv6); 4494 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4495 buf->large_rx_ipv4); 4496 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4497 buf->large_rx_ipv6); 4498 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4499 buf->max_ipv4_header_size); 4500 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4501 buf->max_ipv6_header_size); 4502 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4503 buf->max_tcp_header_size); 4504 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4505 buf->max_udp_header_size); 4506 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4507 buf->max_large_tx_size); 4508 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4509 buf->max_large_rx_size); 4510 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4511 buf->ipv6_extension_header); 4512 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4513 buf->tcp_pseudosum_req); 4514 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4515 buf->num_ipv6_ext_headers); 4516 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4517 buf->off_ipv6_ext_headers); 4518 4519 send_control_ip_offload(adapter); 4520 } 4521 4522 static const char *ibmvnic_fw_err_cause(u16 cause) 4523 { 4524 switch (cause) { 4525 case ADAPTER_PROBLEM: 4526 return "adapter problem"; 4527 case BUS_PROBLEM: 4528 return "bus problem"; 4529 case FW_PROBLEM: 4530 return "firmware problem"; 4531 case DD_PROBLEM: 4532 return "device driver problem"; 4533 case EEH_RECOVERY: 4534 return "EEH recovery"; 4535 case FW_UPDATED: 4536 return "firmware updated"; 4537 case LOW_MEMORY: 4538 return "low Memory"; 4539 default: 4540 return "unknown"; 4541 } 4542 } 4543 4544 static void handle_error_indication(union ibmvnic_crq *crq, 4545 struct ibmvnic_adapter *adapter) 4546 { 4547 struct device *dev = &adapter->vdev->dev; 4548 u16 cause; 4549 4550 cause = be16_to_cpu(crq->error_indication.error_cause); 4551 4552 dev_warn_ratelimited(dev, 4553 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4554 crq->error_indication.flags 4555 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4556 ibmvnic_fw_err_cause(cause)); 4557 4558 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4559 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4560 else 4561 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4562 } 4563 4564 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4565 struct ibmvnic_adapter *adapter) 4566 { 4567 struct net_device *netdev = adapter->netdev; 4568 struct device *dev = &adapter->vdev->dev; 4569 long rc; 4570 4571 rc = crq->change_mac_addr_rsp.rc.code; 4572 if (rc) { 4573 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4574 goto out; 4575 } 4576 /* crq->change_mac_addr.mac_addr is the requested one 4577 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4578 */ 4579 ether_addr_copy(netdev->dev_addr, 4580 &crq->change_mac_addr_rsp.mac_addr[0]); 4581 ether_addr_copy(adapter->mac_addr, 4582 &crq->change_mac_addr_rsp.mac_addr[0]); 4583 out: 4584 complete(&adapter->fw_done); 4585 return rc; 4586 } 4587 4588 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4589 struct ibmvnic_adapter *adapter) 4590 { 4591 struct device *dev = &adapter->vdev->dev; 4592 u64 *req_value; 4593 char *name; 4594 4595 atomic_dec(&adapter->running_cap_crqs); 4596 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4597 case REQ_TX_QUEUES: 4598 req_value = &adapter->req_tx_queues; 4599 name = "tx"; 4600 break; 4601 case REQ_RX_QUEUES: 4602 req_value = &adapter->req_rx_queues; 4603 name = "rx"; 4604 break; 4605 case REQ_RX_ADD_QUEUES: 4606 req_value = &adapter->req_rx_add_queues; 4607 name = "rx_add"; 4608 break; 4609 case REQ_TX_ENTRIES_PER_SUBCRQ: 4610 req_value = &adapter->req_tx_entries_per_subcrq; 4611 name = "tx_entries_per_subcrq"; 4612 break; 4613 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4614 req_value = &adapter->req_rx_add_entries_per_subcrq; 4615 name = "rx_add_entries_per_subcrq"; 4616 break; 4617 case REQ_MTU: 4618 req_value = &adapter->req_mtu; 4619 name = "mtu"; 4620 break; 4621 case PROMISC_REQUESTED: 4622 req_value = &adapter->promisc; 4623 name = "promisc"; 4624 break; 4625 default: 4626 dev_err(dev, "Got invalid cap request rsp %d\n", 4627 crq->request_capability.capability); 4628 return; 4629 } 4630 4631 switch (crq->request_capability_rsp.rc.code) { 4632 case SUCCESS: 4633 break; 4634 case PARTIALSUCCESS: 4635 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4636 *req_value, 4637 (long)be64_to_cpu(crq->request_capability_rsp.number), 4638 name); 4639 4640 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4641 REQ_MTU) { 4642 pr_err("mtu of %llu is not supported. Reverting.\n", 4643 *req_value); 4644 *req_value = adapter->fallback.mtu; 4645 } else { 4646 *req_value = 4647 be64_to_cpu(crq->request_capability_rsp.number); 4648 } 4649 4650 send_request_cap(adapter, 1); 4651 return; 4652 default: 4653 dev_err(dev, "Error %d in request cap rsp\n", 4654 crq->request_capability_rsp.rc.code); 4655 return; 4656 } 4657 4658 /* Done receiving requested capabilities, query IP offload support */ 4659 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4660 adapter->wait_capability = false; 4661 send_query_ip_offload(adapter); 4662 } 4663 } 4664 4665 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4666 struct ibmvnic_adapter *adapter) 4667 { 4668 struct device *dev = &adapter->vdev->dev; 4669 struct net_device *netdev = adapter->netdev; 4670 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4671 struct ibmvnic_login_buffer *login = adapter->login_buf; 4672 u64 *tx_handle_array; 4673 u64 *rx_handle_array; 4674 int num_tx_pools; 4675 int num_rx_pools; 4676 u64 *size_array; 4677 int i; 4678 4679 /* CHECK: Test/set of login_pending does not need to be atomic 4680 * because only ibmvnic_tasklet tests/clears this. 4681 */ 4682 if (!adapter->login_pending) { 4683 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4684 return 0; 4685 } 4686 adapter->login_pending = false; 4687 4688 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4689 DMA_TO_DEVICE); 4690 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4691 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4692 4693 /* If the number of queues requested can't be allocated by the 4694 * server, the login response will return with code 1. We will need 4695 * to resend the login buffer with fewer queues requested. 4696 */ 4697 if (login_rsp_crq->generic.rc.code) { 4698 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4699 complete(&adapter->init_done); 4700 return 0; 4701 } 4702 4703 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4704 4705 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4706 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4707 netdev_dbg(adapter->netdev, "%016lx\n", 4708 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4709 } 4710 4711 /* Sanity checks */ 4712 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4713 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4714 adapter->req_rx_add_queues != 4715 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4716 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4717 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4718 return -EIO; 4719 } 4720 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4721 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4722 /* variable buffer sizes are not supported, so just read the 4723 * first entry. 4724 */ 4725 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4726 4727 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4728 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4729 4730 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4731 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4732 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4733 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4734 4735 for (i = 0; i < num_tx_pools; i++) 4736 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4737 4738 for (i = 0; i < num_rx_pools; i++) 4739 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4740 4741 adapter->num_active_tx_scrqs = num_tx_pools; 4742 adapter->num_active_rx_scrqs = num_rx_pools; 4743 release_login_rsp_buffer(adapter); 4744 release_login_buffer(adapter); 4745 complete(&adapter->init_done); 4746 4747 return 0; 4748 } 4749 4750 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4751 struct ibmvnic_adapter *adapter) 4752 { 4753 struct device *dev = &adapter->vdev->dev; 4754 long rc; 4755 4756 rc = crq->request_unmap_rsp.rc.code; 4757 if (rc) 4758 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4759 } 4760 4761 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4762 struct ibmvnic_adapter *adapter) 4763 { 4764 struct net_device *netdev = adapter->netdev; 4765 struct device *dev = &adapter->vdev->dev; 4766 long rc; 4767 4768 rc = crq->query_map_rsp.rc.code; 4769 if (rc) { 4770 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4771 return; 4772 } 4773 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4774 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4775 crq->query_map_rsp.free_pages); 4776 } 4777 4778 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4779 struct ibmvnic_adapter *adapter) 4780 { 4781 struct net_device *netdev = adapter->netdev; 4782 struct device *dev = &adapter->vdev->dev; 4783 long rc; 4784 4785 atomic_dec(&adapter->running_cap_crqs); 4786 netdev_dbg(netdev, "Outstanding queries: %d\n", 4787 atomic_read(&adapter->running_cap_crqs)); 4788 rc = crq->query_capability.rc.code; 4789 if (rc) { 4790 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4791 goto out; 4792 } 4793 4794 switch (be16_to_cpu(crq->query_capability.capability)) { 4795 case MIN_TX_QUEUES: 4796 adapter->min_tx_queues = 4797 be64_to_cpu(crq->query_capability.number); 4798 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4799 adapter->min_tx_queues); 4800 break; 4801 case MIN_RX_QUEUES: 4802 adapter->min_rx_queues = 4803 be64_to_cpu(crq->query_capability.number); 4804 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4805 adapter->min_rx_queues); 4806 break; 4807 case MIN_RX_ADD_QUEUES: 4808 adapter->min_rx_add_queues = 4809 be64_to_cpu(crq->query_capability.number); 4810 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4811 adapter->min_rx_add_queues); 4812 break; 4813 case MAX_TX_QUEUES: 4814 adapter->max_tx_queues = 4815 be64_to_cpu(crq->query_capability.number); 4816 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4817 adapter->max_tx_queues); 4818 break; 4819 case MAX_RX_QUEUES: 4820 adapter->max_rx_queues = 4821 be64_to_cpu(crq->query_capability.number); 4822 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4823 adapter->max_rx_queues); 4824 break; 4825 case MAX_RX_ADD_QUEUES: 4826 adapter->max_rx_add_queues = 4827 be64_to_cpu(crq->query_capability.number); 4828 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4829 adapter->max_rx_add_queues); 4830 break; 4831 case MIN_TX_ENTRIES_PER_SUBCRQ: 4832 adapter->min_tx_entries_per_subcrq = 4833 be64_to_cpu(crq->query_capability.number); 4834 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4835 adapter->min_tx_entries_per_subcrq); 4836 break; 4837 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4838 adapter->min_rx_add_entries_per_subcrq = 4839 be64_to_cpu(crq->query_capability.number); 4840 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4841 adapter->min_rx_add_entries_per_subcrq); 4842 break; 4843 case MAX_TX_ENTRIES_PER_SUBCRQ: 4844 adapter->max_tx_entries_per_subcrq = 4845 be64_to_cpu(crq->query_capability.number); 4846 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4847 adapter->max_tx_entries_per_subcrq); 4848 break; 4849 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4850 adapter->max_rx_add_entries_per_subcrq = 4851 be64_to_cpu(crq->query_capability.number); 4852 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4853 adapter->max_rx_add_entries_per_subcrq); 4854 break; 4855 case TCP_IP_OFFLOAD: 4856 adapter->tcp_ip_offload = 4857 be64_to_cpu(crq->query_capability.number); 4858 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4859 adapter->tcp_ip_offload); 4860 break; 4861 case PROMISC_SUPPORTED: 4862 adapter->promisc_supported = 4863 be64_to_cpu(crq->query_capability.number); 4864 netdev_dbg(netdev, "promisc_supported = %lld\n", 4865 adapter->promisc_supported); 4866 break; 4867 case MIN_MTU: 4868 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4869 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4870 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4871 break; 4872 case MAX_MTU: 4873 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4874 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4875 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4876 break; 4877 case MAX_MULTICAST_FILTERS: 4878 adapter->max_multicast_filters = 4879 be64_to_cpu(crq->query_capability.number); 4880 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4881 adapter->max_multicast_filters); 4882 break; 4883 case VLAN_HEADER_INSERTION: 4884 adapter->vlan_header_insertion = 4885 be64_to_cpu(crq->query_capability.number); 4886 if (adapter->vlan_header_insertion) 4887 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4888 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4889 adapter->vlan_header_insertion); 4890 break; 4891 case RX_VLAN_HEADER_INSERTION: 4892 adapter->rx_vlan_header_insertion = 4893 be64_to_cpu(crq->query_capability.number); 4894 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4895 adapter->rx_vlan_header_insertion); 4896 break; 4897 case MAX_TX_SG_ENTRIES: 4898 adapter->max_tx_sg_entries = 4899 be64_to_cpu(crq->query_capability.number); 4900 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4901 adapter->max_tx_sg_entries); 4902 break; 4903 case RX_SG_SUPPORTED: 4904 adapter->rx_sg_supported = 4905 be64_to_cpu(crq->query_capability.number); 4906 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4907 adapter->rx_sg_supported); 4908 break; 4909 case OPT_TX_COMP_SUB_QUEUES: 4910 adapter->opt_tx_comp_sub_queues = 4911 be64_to_cpu(crq->query_capability.number); 4912 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4913 adapter->opt_tx_comp_sub_queues); 4914 break; 4915 case OPT_RX_COMP_QUEUES: 4916 adapter->opt_rx_comp_queues = 4917 be64_to_cpu(crq->query_capability.number); 4918 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4919 adapter->opt_rx_comp_queues); 4920 break; 4921 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4922 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4923 be64_to_cpu(crq->query_capability.number); 4924 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4925 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4926 break; 4927 case OPT_TX_ENTRIES_PER_SUBCRQ: 4928 adapter->opt_tx_entries_per_subcrq = 4929 be64_to_cpu(crq->query_capability.number); 4930 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4931 adapter->opt_tx_entries_per_subcrq); 4932 break; 4933 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4934 adapter->opt_rxba_entries_per_subcrq = 4935 be64_to_cpu(crq->query_capability.number); 4936 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4937 adapter->opt_rxba_entries_per_subcrq); 4938 break; 4939 case TX_RX_DESC_REQ: 4940 adapter->tx_rx_desc_req = crq->query_capability.number; 4941 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4942 adapter->tx_rx_desc_req); 4943 break; 4944 4945 default: 4946 netdev_err(netdev, "Got invalid cap rsp %d\n", 4947 crq->query_capability.capability); 4948 } 4949 4950 out: 4951 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4952 adapter->wait_capability = false; 4953 send_request_cap(adapter, 0); 4954 } 4955 } 4956 4957 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4958 { 4959 union ibmvnic_crq crq; 4960 int rc; 4961 4962 memset(&crq, 0, sizeof(crq)); 4963 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4964 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4965 4966 mutex_lock(&adapter->fw_lock); 4967 adapter->fw_done_rc = 0; 4968 reinit_completion(&adapter->fw_done); 4969 4970 rc = ibmvnic_send_crq(adapter, &crq); 4971 if (rc) { 4972 mutex_unlock(&adapter->fw_lock); 4973 return rc; 4974 } 4975 4976 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4977 if (rc) { 4978 mutex_unlock(&adapter->fw_lock); 4979 return rc; 4980 } 4981 4982 mutex_unlock(&adapter->fw_lock); 4983 return adapter->fw_done_rc ? -EIO : 0; 4984 } 4985 4986 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4987 struct ibmvnic_adapter *adapter) 4988 { 4989 struct net_device *netdev = adapter->netdev; 4990 int rc; 4991 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4992 4993 rc = crq->query_phys_parms_rsp.rc.code; 4994 if (rc) { 4995 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4996 return rc; 4997 } 4998 switch (rspeed) { 4999 case IBMVNIC_10MBPS: 5000 adapter->speed = SPEED_10; 5001 break; 5002 case IBMVNIC_100MBPS: 5003 adapter->speed = SPEED_100; 5004 break; 5005 case IBMVNIC_1GBPS: 5006 adapter->speed = SPEED_1000; 5007 break; 5008 case IBMVNIC_10GBPS: 5009 adapter->speed = SPEED_10000; 5010 break; 5011 case IBMVNIC_25GBPS: 5012 adapter->speed = SPEED_25000; 5013 break; 5014 case IBMVNIC_40GBPS: 5015 adapter->speed = SPEED_40000; 5016 break; 5017 case IBMVNIC_50GBPS: 5018 adapter->speed = SPEED_50000; 5019 break; 5020 case IBMVNIC_100GBPS: 5021 adapter->speed = SPEED_100000; 5022 break; 5023 case IBMVNIC_200GBPS: 5024 adapter->speed = SPEED_200000; 5025 break; 5026 default: 5027 if (netif_carrier_ok(netdev)) 5028 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5029 adapter->speed = SPEED_UNKNOWN; 5030 } 5031 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5032 adapter->duplex = DUPLEX_FULL; 5033 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5034 adapter->duplex = DUPLEX_HALF; 5035 else 5036 adapter->duplex = DUPLEX_UNKNOWN; 5037 5038 return rc; 5039 } 5040 5041 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5042 struct ibmvnic_adapter *adapter) 5043 { 5044 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5045 struct net_device *netdev = adapter->netdev; 5046 struct device *dev = &adapter->vdev->dev; 5047 u64 *u64_crq = (u64 *)crq; 5048 long rc; 5049 5050 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5051 (unsigned long)cpu_to_be64(u64_crq[0]), 5052 (unsigned long)cpu_to_be64(u64_crq[1])); 5053 switch (gen_crq->first) { 5054 case IBMVNIC_CRQ_INIT_RSP: 5055 switch (gen_crq->cmd) { 5056 case IBMVNIC_CRQ_INIT: 5057 dev_info(dev, "Partner initialized\n"); 5058 adapter->from_passive_init = true; 5059 /* Discard any stale login responses from prev reset. 5060 * CHECK: should we clear even on INIT_COMPLETE? 5061 */ 5062 adapter->login_pending = false; 5063 5064 if (!completion_done(&adapter->init_done)) { 5065 complete(&adapter->init_done); 5066 adapter->init_done_rc = -EIO; 5067 } 5068 5069 if (adapter->state == VNIC_DOWN) 5070 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5071 else 5072 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5073 5074 if (rc && rc != -EBUSY) { 5075 /* We were unable to schedule the failover 5076 * reset either because the adapter was still 5077 * probing (eg: during kexec) or we could not 5078 * allocate memory. Clear the failover_pending 5079 * flag since no one else will. We ignore 5080 * EBUSY because it means either FAILOVER reset 5081 * is already scheduled or the adapter is 5082 * being removed. 5083 */ 5084 netdev_err(netdev, 5085 "Error %ld scheduling failover reset\n", 5086 rc); 5087 adapter->failover_pending = false; 5088 } 5089 break; 5090 case IBMVNIC_CRQ_INIT_COMPLETE: 5091 dev_info(dev, "Partner initialization complete\n"); 5092 adapter->crq.active = true; 5093 send_version_xchg(adapter); 5094 break; 5095 default: 5096 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5097 } 5098 return; 5099 case IBMVNIC_CRQ_XPORT_EVENT: 5100 netif_carrier_off(netdev); 5101 adapter->crq.active = false; 5102 /* terminate any thread waiting for a response 5103 * from the device 5104 */ 5105 if (!completion_done(&adapter->fw_done)) { 5106 adapter->fw_done_rc = -EIO; 5107 complete(&adapter->fw_done); 5108 } 5109 if (!completion_done(&adapter->stats_done)) 5110 complete(&adapter->stats_done); 5111 if (test_bit(0, &adapter->resetting)) 5112 adapter->force_reset_recovery = true; 5113 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5114 dev_info(dev, "Migrated, re-enabling adapter\n"); 5115 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5116 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5117 dev_info(dev, "Backing device failover detected\n"); 5118 adapter->failover_pending = true; 5119 } else { 5120 /* The adapter lost the connection */ 5121 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5122 gen_crq->cmd); 5123 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5124 } 5125 return; 5126 case IBMVNIC_CRQ_CMD_RSP: 5127 break; 5128 default: 5129 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5130 gen_crq->first); 5131 return; 5132 } 5133 5134 switch (gen_crq->cmd) { 5135 case VERSION_EXCHANGE_RSP: 5136 rc = crq->version_exchange_rsp.rc.code; 5137 if (rc) { 5138 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5139 break; 5140 } 5141 ibmvnic_version = 5142 be16_to_cpu(crq->version_exchange_rsp.version); 5143 dev_info(dev, "Partner protocol version is %d\n", 5144 ibmvnic_version); 5145 send_query_cap(adapter); 5146 break; 5147 case QUERY_CAPABILITY_RSP: 5148 handle_query_cap_rsp(crq, adapter); 5149 break; 5150 case QUERY_MAP_RSP: 5151 handle_query_map_rsp(crq, adapter); 5152 break; 5153 case REQUEST_MAP_RSP: 5154 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5155 complete(&adapter->fw_done); 5156 break; 5157 case REQUEST_UNMAP_RSP: 5158 handle_request_unmap_rsp(crq, adapter); 5159 break; 5160 case REQUEST_CAPABILITY_RSP: 5161 handle_request_cap_rsp(crq, adapter); 5162 break; 5163 case LOGIN_RSP: 5164 netdev_dbg(netdev, "Got Login Response\n"); 5165 handle_login_rsp(crq, adapter); 5166 break; 5167 case LOGICAL_LINK_STATE_RSP: 5168 netdev_dbg(netdev, 5169 "Got Logical Link State Response, state: %d rc: %d\n", 5170 crq->logical_link_state_rsp.link_state, 5171 crq->logical_link_state_rsp.rc.code); 5172 adapter->logical_link_state = 5173 crq->logical_link_state_rsp.link_state; 5174 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5175 complete(&adapter->init_done); 5176 break; 5177 case LINK_STATE_INDICATION: 5178 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5179 adapter->phys_link_state = 5180 crq->link_state_indication.phys_link_state; 5181 adapter->logical_link_state = 5182 crq->link_state_indication.logical_link_state; 5183 if (adapter->phys_link_state && adapter->logical_link_state) 5184 netif_carrier_on(netdev); 5185 else 5186 netif_carrier_off(netdev); 5187 break; 5188 case CHANGE_MAC_ADDR_RSP: 5189 netdev_dbg(netdev, "Got MAC address change Response\n"); 5190 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5191 break; 5192 case ERROR_INDICATION: 5193 netdev_dbg(netdev, "Got Error Indication\n"); 5194 handle_error_indication(crq, adapter); 5195 break; 5196 case REQUEST_STATISTICS_RSP: 5197 netdev_dbg(netdev, "Got Statistics Response\n"); 5198 complete(&adapter->stats_done); 5199 break; 5200 case QUERY_IP_OFFLOAD_RSP: 5201 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5202 handle_query_ip_offload_rsp(adapter); 5203 break; 5204 case MULTICAST_CTRL_RSP: 5205 netdev_dbg(netdev, "Got multicast control Response\n"); 5206 break; 5207 case CONTROL_IP_OFFLOAD_RSP: 5208 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5209 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5210 sizeof(adapter->ip_offload_ctrl), 5211 DMA_TO_DEVICE); 5212 complete(&adapter->init_done); 5213 break; 5214 case COLLECT_FW_TRACE_RSP: 5215 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5216 complete(&adapter->fw_done); 5217 break; 5218 case GET_VPD_SIZE_RSP: 5219 handle_vpd_size_rsp(crq, adapter); 5220 break; 5221 case GET_VPD_RSP: 5222 handle_vpd_rsp(crq, adapter); 5223 break; 5224 case QUERY_PHYS_PARMS_RSP: 5225 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5226 complete(&adapter->fw_done); 5227 break; 5228 default: 5229 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5230 gen_crq->cmd); 5231 } 5232 } 5233 5234 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5235 { 5236 struct ibmvnic_adapter *adapter = instance; 5237 5238 tasklet_schedule(&adapter->tasklet); 5239 return IRQ_HANDLED; 5240 } 5241 5242 static void ibmvnic_tasklet(struct tasklet_struct *t) 5243 { 5244 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5245 struct ibmvnic_crq_queue *queue = &adapter->crq; 5246 union ibmvnic_crq *crq; 5247 unsigned long flags; 5248 bool done = false; 5249 5250 spin_lock_irqsave(&queue->lock, flags); 5251 while (!done) { 5252 /* Pull all the valid messages off the CRQ */ 5253 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5254 /* This barrier makes sure ibmvnic_next_crq()'s 5255 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5256 * before ibmvnic_handle_crq()'s 5257 * switch(gen_crq->first) and switch(gen_crq->cmd). 5258 */ 5259 dma_rmb(); 5260 ibmvnic_handle_crq(crq, adapter); 5261 crq->generic.first = 0; 5262 } 5263 5264 /* remain in tasklet until all 5265 * capabilities responses are received 5266 */ 5267 if (!adapter->wait_capability) 5268 done = true; 5269 } 5270 /* if capabilities CRQ's were sent in this tasklet, the following 5271 * tasklet must wait until all responses are received 5272 */ 5273 if (atomic_read(&adapter->running_cap_crqs) != 0) 5274 adapter->wait_capability = true; 5275 spin_unlock_irqrestore(&queue->lock, flags); 5276 } 5277 5278 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5279 { 5280 struct vio_dev *vdev = adapter->vdev; 5281 int rc; 5282 5283 do { 5284 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5285 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5286 5287 if (rc) 5288 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5289 5290 return rc; 5291 } 5292 5293 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5294 { 5295 struct ibmvnic_crq_queue *crq = &adapter->crq; 5296 struct device *dev = &adapter->vdev->dev; 5297 struct vio_dev *vdev = adapter->vdev; 5298 int rc; 5299 5300 /* Close the CRQ */ 5301 do { 5302 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5303 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5304 5305 /* Clean out the queue */ 5306 if (!crq->msgs) 5307 return -EINVAL; 5308 5309 memset(crq->msgs, 0, PAGE_SIZE); 5310 crq->cur = 0; 5311 crq->active = false; 5312 5313 /* And re-open it again */ 5314 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5315 crq->msg_token, PAGE_SIZE); 5316 5317 if (rc == H_CLOSED) 5318 /* Adapter is good, but other end is not ready */ 5319 dev_warn(dev, "Partner adapter not ready\n"); 5320 else if (rc != 0) 5321 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5322 5323 return rc; 5324 } 5325 5326 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5327 { 5328 struct ibmvnic_crq_queue *crq = &adapter->crq; 5329 struct vio_dev *vdev = adapter->vdev; 5330 long rc; 5331 5332 if (!crq->msgs) 5333 return; 5334 5335 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5336 free_irq(vdev->irq, adapter); 5337 tasklet_kill(&adapter->tasklet); 5338 do { 5339 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5340 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5341 5342 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5343 DMA_BIDIRECTIONAL); 5344 free_page((unsigned long)crq->msgs); 5345 crq->msgs = NULL; 5346 crq->active = false; 5347 } 5348 5349 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5350 { 5351 struct ibmvnic_crq_queue *crq = &adapter->crq; 5352 struct device *dev = &adapter->vdev->dev; 5353 struct vio_dev *vdev = adapter->vdev; 5354 int rc, retrc = -ENOMEM; 5355 5356 if (crq->msgs) 5357 return 0; 5358 5359 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5360 /* Should we allocate more than one page? */ 5361 5362 if (!crq->msgs) 5363 return -ENOMEM; 5364 5365 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5366 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5367 DMA_BIDIRECTIONAL); 5368 if (dma_mapping_error(dev, crq->msg_token)) 5369 goto map_failed; 5370 5371 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5372 crq->msg_token, PAGE_SIZE); 5373 5374 if (rc == H_RESOURCE) 5375 /* maybe kexecing and resource is busy. try a reset */ 5376 rc = ibmvnic_reset_crq(adapter); 5377 retrc = rc; 5378 5379 if (rc == H_CLOSED) { 5380 dev_warn(dev, "Partner adapter not ready\n"); 5381 } else if (rc) { 5382 dev_warn(dev, "Error %d opening adapter\n", rc); 5383 goto reg_crq_failed; 5384 } 5385 5386 retrc = 0; 5387 5388 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5389 5390 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5391 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5392 adapter->vdev->unit_address); 5393 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5394 if (rc) { 5395 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5396 vdev->irq, rc); 5397 goto req_irq_failed; 5398 } 5399 5400 rc = vio_enable_interrupts(vdev); 5401 if (rc) { 5402 dev_err(dev, "Error %d enabling interrupts\n", rc); 5403 goto req_irq_failed; 5404 } 5405 5406 crq->cur = 0; 5407 spin_lock_init(&crq->lock); 5408 5409 return retrc; 5410 5411 req_irq_failed: 5412 tasklet_kill(&adapter->tasklet); 5413 do { 5414 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5415 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5416 reg_crq_failed: 5417 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5418 map_failed: 5419 free_page((unsigned long)crq->msgs); 5420 crq->msgs = NULL; 5421 return retrc; 5422 } 5423 5424 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5425 { 5426 struct device *dev = &adapter->vdev->dev; 5427 unsigned long timeout = msecs_to_jiffies(20000); 5428 u64 old_num_rx_queues = adapter->req_rx_queues; 5429 u64 old_num_tx_queues = adapter->req_tx_queues; 5430 int rc; 5431 5432 adapter->from_passive_init = false; 5433 5434 if (reset) 5435 reinit_completion(&adapter->init_done); 5436 5437 adapter->init_done_rc = 0; 5438 rc = ibmvnic_send_crq_init(adapter); 5439 if (rc) { 5440 dev_err(dev, "Send crq init failed with error %d\n", rc); 5441 return rc; 5442 } 5443 5444 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5445 dev_err(dev, "Initialization sequence timed out\n"); 5446 return -1; 5447 } 5448 5449 if (adapter->init_done_rc) { 5450 release_crq_queue(adapter); 5451 return adapter->init_done_rc; 5452 } 5453 5454 if (adapter->from_passive_init) { 5455 adapter->state = VNIC_OPEN; 5456 adapter->from_passive_init = false; 5457 return -1; 5458 } 5459 5460 if (reset && 5461 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5462 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5463 if (adapter->req_rx_queues != old_num_rx_queues || 5464 adapter->req_tx_queues != old_num_tx_queues) { 5465 release_sub_crqs(adapter, 0); 5466 rc = init_sub_crqs(adapter); 5467 } else { 5468 rc = reset_sub_crq_queues(adapter); 5469 } 5470 } else { 5471 rc = init_sub_crqs(adapter); 5472 } 5473 5474 if (rc) { 5475 dev_err(dev, "Initialization of sub crqs failed\n"); 5476 release_crq_queue(adapter); 5477 return rc; 5478 } 5479 5480 rc = init_sub_crq_irqs(adapter); 5481 if (rc) { 5482 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5483 release_crq_queue(adapter); 5484 } 5485 5486 return rc; 5487 } 5488 5489 static struct device_attribute dev_attr_failover; 5490 5491 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5492 { 5493 struct ibmvnic_adapter *adapter; 5494 struct net_device *netdev; 5495 unsigned char *mac_addr_p; 5496 bool init_success; 5497 int rc; 5498 5499 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5500 dev->unit_address); 5501 5502 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5503 VETH_MAC_ADDR, NULL); 5504 if (!mac_addr_p) { 5505 dev_err(&dev->dev, 5506 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5507 __FILE__, __LINE__); 5508 return 0; 5509 } 5510 5511 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5512 IBMVNIC_MAX_QUEUES); 5513 if (!netdev) 5514 return -ENOMEM; 5515 5516 adapter = netdev_priv(netdev); 5517 adapter->state = VNIC_PROBING; 5518 dev_set_drvdata(&dev->dev, netdev); 5519 adapter->vdev = dev; 5520 adapter->netdev = netdev; 5521 adapter->login_pending = false; 5522 5523 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5524 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5525 netdev->irq = dev->irq; 5526 netdev->netdev_ops = &ibmvnic_netdev_ops; 5527 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5528 SET_NETDEV_DEV(netdev, &dev->dev); 5529 5530 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5531 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5532 __ibmvnic_delayed_reset); 5533 INIT_LIST_HEAD(&adapter->rwi_list); 5534 spin_lock_init(&adapter->rwi_lock); 5535 spin_lock_init(&adapter->state_lock); 5536 mutex_init(&adapter->fw_lock); 5537 init_completion(&adapter->init_done); 5538 init_completion(&adapter->fw_done); 5539 init_completion(&adapter->reset_done); 5540 init_completion(&adapter->stats_done); 5541 clear_bit(0, &adapter->resetting); 5542 5543 init_success = false; 5544 do { 5545 rc = init_crq_queue(adapter); 5546 if (rc) { 5547 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5548 rc); 5549 goto ibmvnic_init_fail; 5550 } 5551 5552 rc = ibmvnic_reset_init(adapter, false); 5553 } while (rc == EAGAIN); 5554 5555 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5556 * partner is not ready. CRQ is not active. When the partner becomes 5557 * ready, we will do the passive init reset. 5558 */ 5559 5560 if (!rc) 5561 init_success = true; 5562 5563 rc = init_stats_buffers(adapter); 5564 if (rc) 5565 goto ibmvnic_init_fail; 5566 5567 rc = init_stats_token(adapter); 5568 if (rc) 5569 goto ibmvnic_stats_fail; 5570 5571 rc = device_create_file(&dev->dev, &dev_attr_failover); 5572 if (rc) 5573 goto ibmvnic_dev_file_err; 5574 5575 netif_carrier_off(netdev); 5576 rc = register_netdev(netdev); 5577 if (rc) { 5578 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5579 goto ibmvnic_register_fail; 5580 } 5581 dev_info(&dev->dev, "ibmvnic registered\n"); 5582 5583 if (init_success) { 5584 adapter->state = VNIC_PROBED; 5585 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5586 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5587 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5588 } else { 5589 adapter->state = VNIC_DOWN; 5590 } 5591 5592 adapter->wait_for_reset = false; 5593 adapter->last_reset_time = jiffies; 5594 return 0; 5595 5596 ibmvnic_register_fail: 5597 device_remove_file(&dev->dev, &dev_attr_failover); 5598 5599 ibmvnic_dev_file_err: 5600 release_stats_token(adapter); 5601 5602 ibmvnic_stats_fail: 5603 release_stats_buffers(adapter); 5604 5605 ibmvnic_init_fail: 5606 release_sub_crqs(adapter, 1); 5607 release_crq_queue(adapter); 5608 mutex_destroy(&adapter->fw_lock); 5609 free_netdev(netdev); 5610 5611 return rc; 5612 } 5613 5614 static void ibmvnic_remove(struct vio_dev *dev) 5615 { 5616 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5618 unsigned long flags; 5619 5620 spin_lock_irqsave(&adapter->state_lock, flags); 5621 5622 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5623 * finish. Then, set the state to REMOVING to prevent it from 5624 * scheduling any more work and to have reset functions ignore 5625 * any resets that have already been scheduled. Drop the lock 5626 * after setting state, so __ibmvnic_reset() which is called 5627 * from the flush_work() below, can make progress. 5628 */ 5629 spin_lock(&adapter->rwi_lock); 5630 adapter->state = VNIC_REMOVING; 5631 spin_unlock(&adapter->rwi_lock); 5632 5633 spin_unlock_irqrestore(&adapter->state_lock, flags); 5634 5635 flush_work(&adapter->ibmvnic_reset); 5636 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5637 5638 rtnl_lock(); 5639 unregister_netdevice(netdev); 5640 5641 release_resources(adapter); 5642 release_sub_crqs(adapter, 1); 5643 release_crq_queue(adapter); 5644 5645 release_stats_token(adapter); 5646 release_stats_buffers(adapter); 5647 5648 adapter->state = VNIC_REMOVED; 5649 5650 rtnl_unlock(); 5651 mutex_destroy(&adapter->fw_lock); 5652 device_remove_file(&dev->dev, &dev_attr_failover); 5653 free_netdev(netdev); 5654 dev_set_drvdata(&dev->dev, NULL); 5655 } 5656 5657 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5658 const char *buf, size_t count) 5659 { 5660 struct net_device *netdev = dev_get_drvdata(dev); 5661 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5662 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5663 __be64 session_token; 5664 long rc; 5665 5666 if (!sysfs_streq(buf, "1")) 5667 return -EINVAL; 5668 5669 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5670 H_GET_SESSION_TOKEN, 0, 0, 0); 5671 if (rc) { 5672 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5673 rc); 5674 goto last_resort; 5675 } 5676 5677 session_token = (__be64)retbuf[0]; 5678 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5679 be64_to_cpu(session_token)); 5680 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5681 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5682 if (rc) 5683 netdev_err(netdev, 5684 "H_VIOCTL initiated failover failed, rc %ld\n", 5685 rc); 5686 5687 last_resort: 5688 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5689 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5690 5691 return count; 5692 } 5693 static DEVICE_ATTR_WO(failover); 5694 5695 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5696 { 5697 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5698 struct ibmvnic_adapter *adapter; 5699 struct iommu_table *tbl; 5700 unsigned long ret = 0; 5701 int i; 5702 5703 tbl = get_iommu_table_base(&vdev->dev); 5704 5705 /* netdev inits at probe time along with the structures we need below*/ 5706 if (!netdev) 5707 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5708 5709 adapter = netdev_priv(netdev); 5710 5711 ret += PAGE_SIZE; /* the crq message queue */ 5712 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5713 5714 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5715 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5716 5717 for (i = 0; i < adapter->num_active_rx_pools; i++) 5718 ret += adapter->rx_pool[i].size * 5719 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5720 5721 return ret; 5722 } 5723 5724 static int ibmvnic_resume(struct device *dev) 5725 { 5726 struct net_device *netdev = dev_get_drvdata(dev); 5727 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5728 5729 if (adapter->state != VNIC_OPEN) 5730 return 0; 5731 5732 tasklet_schedule(&adapter->tasklet); 5733 5734 return 0; 5735 } 5736 5737 static const struct vio_device_id ibmvnic_device_table[] = { 5738 {"network", "IBM,vnic"}, 5739 {"", "" } 5740 }; 5741 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5742 5743 static const struct dev_pm_ops ibmvnic_pm_ops = { 5744 .resume = ibmvnic_resume 5745 }; 5746 5747 static struct vio_driver ibmvnic_driver = { 5748 .id_table = ibmvnic_device_table, 5749 .probe = ibmvnic_probe, 5750 .remove = ibmvnic_remove, 5751 .get_desired_dma = ibmvnic_get_desired_dma, 5752 .name = ibmvnic_driver_name, 5753 .pm = &ibmvnic_pm_ops, 5754 }; 5755 5756 /* module functions */ 5757 static int __init ibmvnic_module_init(void) 5758 { 5759 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5760 IBMVNIC_DRIVER_VERSION); 5761 5762 return vio_register_driver(&ibmvnic_driver); 5763 } 5764 5765 static void __exit ibmvnic_module_exit(void) 5766 { 5767 vio_unregister_driver(&ibmvnic_driver); 5768 } 5769 5770 module_init(ibmvnic_module_init); 5771 module_exit(ibmvnic_module_exit); 5772