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/irqdomain.h> 57 #include <linux/kthread.h> 58 #include <linux/seq_file.h> 59 #include <linux/interrupt.h> 60 #include <net/net_namespace.h> 61 #include <asm/hvcall.h> 62 #include <linux/atomic.h> 63 #include <asm/vio.h> 64 #include <asm/xive.h> 65 #include <asm/iommu.h> 66 #include <linux/uaccess.h> 67 #include <asm/firmware.h> 68 #include <linux/workqueue.h> 69 #include <linux/if_vlan.h> 70 #include <linux/utsname.h> 71 #include <linux/cpu.h> 72 73 #include "ibmvnic.h" 74 75 static const char ibmvnic_driver_name[] = "ibmvnic"; 76 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 77 78 MODULE_AUTHOR("Santiago Leon"); 79 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 80 MODULE_LICENSE("GPL"); 81 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 82 83 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 84 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 85 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 87 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 88 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter); 101 static inline void reinit_init_done(struct ibmvnic_adapter *adapter); 102 static void send_query_map(struct ibmvnic_adapter *adapter); 103 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 104 static int send_request_unmap(struct ibmvnic_adapter *, u8); 105 static int send_login(struct ibmvnic_adapter *adapter); 106 static void send_query_cap(struct ibmvnic_adapter *adapter); 107 static int init_sub_crqs(struct ibmvnic_adapter *); 108 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 109 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 110 static void release_crq_queue(struct ibmvnic_adapter *); 111 static int __ibmvnic_set_mac(struct net_device *, u8 *); 112 static int init_crq_queue(struct ibmvnic_adapter *adapter); 113 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 114 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 115 struct ibmvnic_sub_crq_queue *tx_scrq); 116 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 117 struct ibmvnic_long_term_buff *ltb); 118 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 119 static void flush_reset_queue(struct ibmvnic_adapter *adapter); 120 121 struct ibmvnic_stat { 122 char name[ETH_GSTRING_LEN]; 123 int offset; 124 }; 125 126 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 127 offsetof(struct ibmvnic_statistics, stat)) 128 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 129 130 static const struct ibmvnic_stat ibmvnic_stats[] = { 131 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 132 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 133 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 134 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 135 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 136 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 137 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 138 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 139 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 140 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 141 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 142 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 143 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 144 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 145 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 146 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 147 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 148 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 149 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 150 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 151 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 152 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 153 }; 154 155 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 156 { 157 union ibmvnic_crq crq; 158 159 memset(&crq, 0, sizeof(crq)); 160 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 161 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 162 163 return ibmvnic_send_crq(adapter, &crq); 164 } 165 166 static int send_version_xchg(struct ibmvnic_adapter *adapter) 167 { 168 union ibmvnic_crq crq; 169 170 memset(&crq, 0, sizeof(crq)); 171 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 172 crq.version_exchange.cmd = VERSION_EXCHANGE; 173 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 174 175 return ibmvnic_send_crq(adapter, &crq); 176 } 177 178 static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter, 179 struct ibmvnic_sub_crq_queue *queue) 180 { 181 if (!(queue && queue->irq)) 182 return; 183 184 cpumask_clear(queue->affinity_mask); 185 186 if (irq_set_affinity_and_hint(queue->irq, NULL)) 187 netdev_warn(adapter->netdev, 188 "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n", 189 __func__, queue, queue->irq); 190 } 191 192 static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter) 193 { 194 struct ibmvnic_sub_crq_queue **rxqs; 195 struct ibmvnic_sub_crq_queue **txqs; 196 int num_rxqs, num_txqs; 197 int i; 198 199 rxqs = adapter->rx_scrq; 200 txqs = adapter->tx_scrq; 201 num_txqs = adapter->num_active_tx_scrqs; 202 num_rxqs = adapter->num_active_rx_scrqs; 203 204 netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__); 205 if (txqs) { 206 for (i = 0; i < num_txqs; i++) 207 ibmvnic_clean_queue_affinity(adapter, txqs[i]); 208 } 209 if (rxqs) { 210 for (i = 0; i < num_rxqs; i++) 211 ibmvnic_clean_queue_affinity(adapter, rxqs[i]); 212 } 213 } 214 215 static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue, 216 unsigned int *cpu, int *stragglers, 217 int stride) 218 { 219 cpumask_var_t mask; 220 int i; 221 int rc = 0; 222 223 if (!(queue && queue->irq)) 224 return rc; 225 226 /* cpumask_var_t is either a pointer or array, allocation works here */ 227 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 228 return -ENOMEM; 229 230 /* while we have extra cpu give one extra to this irq */ 231 if (*stragglers) { 232 stride++; 233 (*stragglers)--; 234 } 235 /* atomic write is safer than writing bit by bit directly */ 236 for (i = 0; i < stride; i++) { 237 cpumask_set_cpu(*cpu, mask); 238 *cpu = cpumask_next_wrap(*cpu, cpu_online_mask, 239 nr_cpu_ids, false); 240 } 241 /* set queue affinity mask */ 242 cpumask_copy(queue->affinity_mask, mask); 243 rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask); 244 free_cpumask_var(mask); 245 246 return rc; 247 } 248 249 /* assumes cpu read lock is held */ 250 static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter) 251 { 252 struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq; 253 struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq; 254 struct ibmvnic_sub_crq_queue *queue; 255 int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0; 256 int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0; 257 int total_queues, stride, stragglers, i; 258 unsigned int num_cpu, cpu; 259 bool is_rx_queue; 260 int rc = 0; 261 262 netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__); 263 if (!(adapter->rx_scrq && adapter->tx_scrq)) { 264 netdev_warn(adapter->netdev, 265 "%s: Set affinity failed, queues not allocated\n", 266 __func__); 267 return; 268 } 269 270 total_queues = num_rxqs + num_txqs; 271 num_cpu = num_online_cpus(); 272 /* number of cpu's assigned per irq */ 273 stride = max_t(int, num_cpu / total_queues, 1); 274 /* number of leftover cpu's */ 275 stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0; 276 /* next available cpu to assign irq to */ 277 cpu = cpumask_next(-1, cpu_online_mask); 278 279 for (i = 0; i < total_queues; i++) { 280 is_rx_queue = false; 281 /* balance core load by alternating rx and tx assignments 282 * ex: TX0 -> RX0 -> TX1 -> RX1 etc. 283 */ 284 if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) { 285 queue = rxqs[i_rxqs++]; 286 is_rx_queue = true; 287 } else { 288 queue = txqs[i_txqs++]; 289 } 290 291 rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, 292 stride); 293 if (rc) 294 goto out; 295 296 if (!queue || is_rx_queue) 297 continue; 298 299 rc = __netif_set_xps_queue(adapter->netdev, 300 cpumask_bits(queue->affinity_mask), 301 i_txqs - 1, XPS_CPUS); 302 if (rc) 303 netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n", 304 __func__, i_txqs - 1, rc); 305 } 306 307 out: 308 if (rc) { 309 netdev_warn(adapter->netdev, 310 "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n", 311 __func__, queue, queue->irq, rc); 312 ibmvnic_clean_affinity(adapter); 313 } 314 } 315 316 static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node) 317 { 318 struct ibmvnic_adapter *adapter; 319 320 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 321 ibmvnic_set_affinity(adapter); 322 return 0; 323 } 324 325 static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node) 326 { 327 struct ibmvnic_adapter *adapter; 328 329 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead); 330 ibmvnic_set_affinity(adapter); 331 return 0; 332 } 333 334 static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node) 335 { 336 struct ibmvnic_adapter *adapter; 337 338 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 339 ibmvnic_clean_affinity(adapter); 340 return 0; 341 } 342 343 static enum cpuhp_state ibmvnic_online; 344 345 static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter) 346 { 347 int ret; 348 349 ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node); 350 if (ret) 351 return ret; 352 ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD, 353 &adapter->node_dead); 354 if (!ret) 355 return ret; 356 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 357 return ret; 358 } 359 360 static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter) 361 { 362 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 363 cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD, 364 &adapter->node_dead); 365 } 366 367 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 368 unsigned long length, unsigned long *number, 369 unsigned long *irq) 370 { 371 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 372 long rc; 373 374 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 375 *number = retbuf[0]; 376 *irq = retbuf[1]; 377 378 return rc; 379 } 380 381 /** 382 * ibmvnic_wait_for_completion - Check device state and wait for completion 383 * @adapter: private device data 384 * @comp_done: completion structure to wait for 385 * @timeout: time to wait in milliseconds 386 * 387 * Wait for a completion signal or until the timeout limit is reached 388 * while checking that the device is still active. 389 */ 390 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 391 struct completion *comp_done, 392 unsigned long timeout) 393 { 394 struct net_device *netdev; 395 unsigned long div_timeout; 396 u8 retry; 397 398 netdev = adapter->netdev; 399 retry = 5; 400 div_timeout = msecs_to_jiffies(timeout / retry); 401 while (true) { 402 if (!adapter->crq.active) { 403 netdev_err(netdev, "Device down!\n"); 404 return -ENODEV; 405 } 406 if (!retry--) 407 break; 408 if (wait_for_completion_timeout(comp_done, div_timeout)) 409 return 0; 410 } 411 netdev_err(netdev, "Operation timed out.\n"); 412 return -ETIMEDOUT; 413 } 414 415 /** 416 * reuse_ltb() - Check if a long term buffer can be reused 417 * @ltb: The long term buffer to be checked 418 * @size: The size of the long term buffer. 419 * 420 * An LTB can be reused unless its size has changed. 421 * 422 * Return: Return true if the LTB can be reused, false otherwise. 423 */ 424 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 425 { 426 return (ltb->buff && ltb->size == size); 427 } 428 429 /** 430 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 431 * 432 * @adapter: ibmvnic adapter associated to the LTB 433 * @ltb: container object for the LTB 434 * @size: size of the LTB 435 * 436 * Allocate an LTB of the specified size and notify VIOS. 437 * 438 * If the given @ltb already has the correct size, reuse it. Otherwise if 439 * its non-NULL, free it. Then allocate a new one of the correct size. 440 * Notify the VIOS either way since we may now be working with a new VIOS. 441 * 442 * Allocating larger chunks of memory during resets, specially LPM or under 443 * low memory situations can cause resets to fail/timeout and for LPAR to 444 * lose connectivity. So hold onto the LTB even if we fail to communicate 445 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 446 * 447 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 448 * a negative value otherwise. 449 */ 450 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 451 struct ibmvnic_long_term_buff *ltb, int size) 452 { 453 struct device *dev = &adapter->vdev->dev; 454 u64 prev = 0; 455 int rc; 456 457 if (!reuse_ltb(ltb, size)) { 458 dev_dbg(dev, 459 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 460 ltb->size, size); 461 prev = ltb->size; 462 free_long_term_buff(adapter, ltb); 463 } 464 465 if (ltb->buff) { 466 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 467 ltb->map_id, ltb->size); 468 } else { 469 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 470 GFP_KERNEL); 471 if (!ltb->buff) { 472 dev_err(dev, "Couldn't alloc long term buffer\n"); 473 return -ENOMEM; 474 } 475 ltb->size = size; 476 477 ltb->map_id = find_first_zero_bit(adapter->map_ids, 478 MAX_MAP_ID); 479 bitmap_set(adapter->map_ids, ltb->map_id, 1); 480 481 dev_dbg(dev, 482 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", 483 ltb->map_id, ltb->size, prev); 484 } 485 486 /* Ensure ltb is zeroed - specially when reusing it. */ 487 memset(ltb->buff, 0, ltb->size); 488 489 mutex_lock(&adapter->fw_lock); 490 adapter->fw_done_rc = 0; 491 reinit_completion(&adapter->fw_done); 492 493 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 494 if (rc) { 495 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 496 goto out; 497 } 498 499 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 500 if (rc) { 501 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 502 rc); 503 goto out; 504 } 505 506 if (adapter->fw_done_rc) { 507 dev_err(dev, "Couldn't map LTB, rc = %d\n", 508 adapter->fw_done_rc); 509 rc = -EIO; 510 goto out; 511 } 512 rc = 0; 513 out: 514 /* don't free LTB on communication error - see function header */ 515 mutex_unlock(&adapter->fw_lock); 516 return rc; 517 } 518 519 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 520 struct ibmvnic_long_term_buff *ltb) 521 { 522 struct device *dev = &adapter->vdev->dev; 523 524 if (!ltb->buff) 525 return; 526 527 /* VIOS automatically unmaps the long term buffer at remote 528 * end for the following resets: 529 * FAILOVER, MOBILITY, TIMEOUT. 530 */ 531 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 532 adapter->reset_reason != VNIC_RESET_MOBILITY && 533 adapter->reset_reason != VNIC_RESET_TIMEOUT) 534 send_request_unmap(adapter, ltb->map_id); 535 536 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 537 538 ltb->buff = NULL; 539 /* mark this map_id free */ 540 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 541 ltb->map_id = 0; 542 } 543 544 /** 545 * free_ltb_set - free the given set of long term buffers (LTBS) 546 * @adapter: The ibmvnic adapter containing this ltb set 547 * @ltb_set: The ltb_set to be freed 548 * 549 * Free the set of LTBs in the given set. 550 */ 551 552 static void free_ltb_set(struct ibmvnic_adapter *adapter, 553 struct ibmvnic_ltb_set *ltb_set) 554 { 555 int i; 556 557 for (i = 0; i < ltb_set->num_ltbs; i++) 558 free_long_term_buff(adapter, <b_set->ltbs[i]); 559 560 kfree(ltb_set->ltbs); 561 ltb_set->ltbs = NULL; 562 ltb_set->num_ltbs = 0; 563 } 564 565 /** 566 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) 567 * 568 * @adapter: ibmvnic adapter associated to the LTB 569 * @ltb_set: container object for the set of LTBs 570 * @num_buffs: Number of buffers in the LTB 571 * @buff_size: Size of each buffer in the LTB 572 * 573 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size 574 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the 575 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. 576 * If new set needs more than in old set, allocate the remaining ones. 577 * Try and reuse as many LTBs as possible and avoid reallocation. 578 * 579 * Any changes to this allocation strategy must be reflected in 580 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). 581 */ 582 static int alloc_ltb_set(struct ibmvnic_adapter *adapter, 583 struct ibmvnic_ltb_set *ltb_set, int num_buffs, 584 int buff_size) 585 { 586 struct device *dev = &adapter->vdev->dev; 587 struct ibmvnic_ltb_set old_set; 588 struct ibmvnic_ltb_set new_set; 589 int rem_size; 590 int tot_size; /* size of all ltbs */ 591 int ltb_size; /* size of one ltb */ 592 int nltbs; 593 int rc; 594 int n; 595 int i; 596 597 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, 598 buff_size); 599 600 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); 601 tot_size = num_buffs * buff_size; 602 603 if (ltb_size > tot_size) 604 ltb_size = tot_size; 605 606 nltbs = tot_size / ltb_size; 607 if (tot_size % ltb_size) 608 nltbs++; 609 610 old_set = *ltb_set; 611 612 if (old_set.num_ltbs == nltbs) { 613 new_set = old_set; 614 } else { 615 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); 616 617 new_set.ltbs = kzalloc(tmp, GFP_KERNEL); 618 if (!new_set.ltbs) 619 return -ENOMEM; 620 621 new_set.num_ltbs = nltbs; 622 623 /* Free any excess ltbs in old set */ 624 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) 625 free_long_term_buff(adapter, &old_set.ltbs[i]); 626 627 /* Copy remaining ltbs to new set. All LTBs except the 628 * last one are of the same size. alloc_long_term_buff() 629 * will realloc if the size changes. 630 */ 631 n = min(old_set.num_ltbs, new_set.num_ltbs); 632 for (i = 0; i < n; i++) 633 new_set.ltbs[i] = old_set.ltbs[i]; 634 635 /* Any additional ltbs in new set will have NULL ltbs for 636 * now and will be allocated in alloc_long_term_buff(). 637 */ 638 639 /* We no longer need the old_set so free it. Note that we 640 * may have reused some ltbs from old set and freed excess 641 * ltbs above. So we only need to free the container now 642 * not the LTBs themselves. (i.e. dont free_ltb_set()!) 643 */ 644 kfree(old_set.ltbs); 645 old_set.ltbs = NULL; 646 old_set.num_ltbs = 0; 647 648 /* Install the new set. If allocations fail below, we will 649 * retry later and know what size LTBs we need. 650 */ 651 *ltb_set = new_set; 652 } 653 654 i = 0; 655 rem_size = tot_size; 656 while (rem_size) { 657 if (ltb_size > rem_size) 658 ltb_size = rem_size; 659 660 rem_size -= ltb_size; 661 662 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); 663 if (rc) 664 goto out; 665 i++; 666 } 667 668 WARN_ON(i != new_set.num_ltbs); 669 670 return 0; 671 out: 672 /* We may have allocated one/more LTBs before failing and we 673 * want to try and reuse on next reset. So don't free ltb set. 674 */ 675 return rc; 676 } 677 678 /** 679 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. 680 * @rxpool: The receive buffer pool containing buffer 681 * @bufidx: Index of buffer in rxpool 682 * @ltbp: (Output) pointer to the long term buffer containing the buffer 683 * @offset: (Output) offset of buffer in the LTB from @ltbp 684 * 685 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the 686 * pool and its corresponding offset. Assume for now that each LTB is of 687 * different size but could possibly be optimized based on the allocation 688 * strategy in alloc_ltb_set(). 689 */ 690 static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, 691 unsigned int bufidx, 692 struct ibmvnic_long_term_buff **ltbp, 693 unsigned int *offset) 694 { 695 struct ibmvnic_long_term_buff *ltb; 696 int nbufs; /* # of buffers in one ltb */ 697 int i; 698 699 WARN_ON(bufidx >= rxpool->size); 700 701 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { 702 ltb = &rxpool->ltb_set.ltbs[i]; 703 nbufs = ltb->size / rxpool->buff_size; 704 if (bufidx < nbufs) 705 break; 706 bufidx -= nbufs; 707 } 708 709 *ltbp = ltb; 710 *offset = bufidx * rxpool->buff_size; 711 } 712 713 /** 714 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. 715 * @txpool: The transmit buffer pool containing buffer 716 * @bufidx: Index of buffer in txpool 717 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer 718 * @offset: (Output) offset of buffer in the LTB from @ltbp 719 * 720 * Map the given buffer identified by [txpool, bufidx] to an LTB in the 721 * pool and its corresponding offset. 722 */ 723 static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, 724 unsigned int bufidx, 725 struct ibmvnic_long_term_buff **ltbp, 726 unsigned int *offset) 727 { 728 struct ibmvnic_long_term_buff *ltb; 729 int nbufs; /* # of buffers in one ltb */ 730 int i; 731 732 WARN_ON_ONCE(bufidx >= txpool->num_buffers); 733 734 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { 735 ltb = &txpool->ltb_set.ltbs[i]; 736 nbufs = ltb->size / txpool->buf_size; 737 if (bufidx < nbufs) 738 break; 739 bufidx -= nbufs; 740 } 741 742 *ltbp = ltb; 743 *offset = bufidx * txpool->buf_size; 744 } 745 746 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 747 { 748 int i; 749 750 for (i = 0; i < adapter->num_active_rx_pools; i++) 751 adapter->rx_pool[i].active = 0; 752 } 753 754 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 755 struct ibmvnic_rx_pool *pool) 756 { 757 int count = pool->size - atomic_read(&pool->available); 758 u64 handle = adapter->rx_scrq[pool->index]->handle; 759 struct device *dev = &adapter->vdev->dev; 760 struct ibmvnic_ind_xmit_queue *ind_bufp; 761 struct ibmvnic_sub_crq_queue *rx_scrq; 762 struct ibmvnic_long_term_buff *ltb; 763 union sub_crq *sub_crq; 764 int buffers_added = 0; 765 unsigned long lpar_rc; 766 struct sk_buff *skb; 767 unsigned int offset; 768 dma_addr_t dma_addr; 769 unsigned char *dst; 770 int shift = 0; 771 int bufidx; 772 int i; 773 774 if (!pool->active) 775 return; 776 777 rx_scrq = adapter->rx_scrq[pool->index]; 778 ind_bufp = &rx_scrq->ind_buf; 779 780 /* netdev_skb_alloc() could have failed after we saved a few skbs 781 * in the indir_buf and we would not have sent them to VIOS yet. 782 * To account for them, start the loop at ind_bufp->index rather 783 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 784 * be 0. 785 */ 786 for (i = ind_bufp->index; i < count; ++i) { 787 bufidx = pool->free_map[pool->next_free]; 788 789 /* We maybe reusing the skb from earlier resets. Allocate 790 * only if necessary. But since the LTB may have changed 791 * during reset (see init_rx_pools()), update LTB below 792 * even if reusing skb. 793 */ 794 skb = pool->rx_buff[bufidx].skb; 795 if (!skb) { 796 skb = netdev_alloc_skb(adapter->netdev, 797 pool->buff_size); 798 if (!skb) { 799 dev_err(dev, "Couldn't replenish rx buff\n"); 800 adapter->replenish_no_mem++; 801 break; 802 } 803 } 804 805 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 806 pool->next_free = (pool->next_free + 1) % pool->size; 807 808 /* Copy the skb to the long term mapped DMA buffer */ 809 map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); 810 dst = ltb->buff + offset; 811 memset(dst, 0, pool->buff_size); 812 dma_addr = ltb->addr + offset; 813 814 /* add the skb to an rx_buff in the pool */ 815 pool->rx_buff[bufidx].data = dst; 816 pool->rx_buff[bufidx].dma = dma_addr; 817 pool->rx_buff[bufidx].skb = skb; 818 pool->rx_buff[bufidx].pool_index = pool->index; 819 pool->rx_buff[bufidx].size = pool->buff_size; 820 821 /* queue the rx_buff for the next send_subcrq_indirect */ 822 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 823 memset(sub_crq, 0, sizeof(*sub_crq)); 824 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 825 sub_crq->rx_add.correlator = 826 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 827 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 828 sub_crq->rx_add.map_id = ltb->map_id; 829 830 /* The length field of the sCRQ is defined to be 24 bits so the 831 * buffer size needs to be left shifted by a byte before it is 832 * converted to big endian to prevent the last byte from being 833 * truncated. 834 */ 835 #ifdef __LITTLE_ENDIAN__ 836 shift = 8; 837 #endif 838 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 839 840 /* if send_subcrq_indirect queue is full, flush to VIOS */ 841 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 842 i == count - 1) { 843 lpar_rc = 844 send_subcrq_indirect(adapter, handle, 845 (u64)ind_bufp->indir_dma, 846 (u64)ind_bufp->index); 847 if (lpar_rc != H_SUCCESS) 848 goto failure; 849 buffers_added += ind_bufp->index; 850 adapter->replenish_add_buff_success += ind_bufp->index; 851 ind_bufp->index = 0; 852 } 853 } 854 atomic_add(buffers_added, &pool->available); 855 return; 856 857 failure: 858 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 859 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 860 for (i = ind_bufp->index - 1; i >= 0; --i) { 861 struct ibmvnic_rx_buff *rx_buff; 862 863 pool->next_free = pool->next_free == 0 ? 864 pool->size - 1 : pool->next_free - 1; 865 sub_crq = &ind_bufp->indir_arr[i]; 866 rx_buff = (struct ibmvnic_rx_buff *) 867 be64_to_cpu(sub_crq->rx_add.correlator); 868 bufidx = (int)(rx_buff - pool->rx_buff); 869 pool->free_map[pool->next_free] = bufidx; 870 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 871 pool->rx_buff[bufidx].skb = NULL; 872 } 873 adapter->replenish_add_buff_failure += ind_bufp->index; 874 atomic_add(buffers_added, &pool->available); 875 ind_bufp->index = 0; 876 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 877 /* Disable buffer pool replenishment and report carrier off if 878 * queue is closed or pending failover. 879 * Firmware guarantees that a signal will be sent to the 880 * driver, triggering a reset. 881 */ 882 deactivate_rx_pools(adapter); 883 netif_carrier_off(adapter->netdev); 884 } 885 } 886 887 static void replenish_pools(struct ibmvnic_adapter *adapter) 888 { 889 int i; 890 891 adapter->replenish_task_cycles++; 892 for (i = 0; i < adapter->num_active_rx_pools; i++) { 893 if (adapter->rx_pool[i].active) 894 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 895 } 896 897 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 898 } 899 900 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 901 { 902 kfree(adapter->tx_stats_buffers); 903 kfree(adapter->rx_stats_buffers); 904 adapter->tx_stats_buffers = NULL; 905 adapter->rx_stats_buffers = NULL; 906 } 907 908 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 909 { 910 adapter->tx_stats_buffers = 911 kcalloc(IBMVNIC_MAX_QUEUES, 912 sizeof(struct ibmvnic_tx_queue_stats), 913 GFP_KERNEL); 914 if (!adapter->tx_stats_buffers) 915 return -ENOMEM; 916 917 adapter->rx_stats_buffers = 918 kcalloc(IBMVNIC_MAX_QUEUES, 919 sizeof(struct ibmvnic_rx_queue_stats), 920 GFP_KERNEL); 921 if (!adapter->rx_stats_buffers) 922 return -ENOMEM; 923 924 return 0; 925 } 926 927 static void release_stats_token(struct ibmvnic_adapter *adapter) 928 { 929 struct device *dev = &adapter->vdev->dev; 930 931 if (!adapter->stats_token) 932 return; 933 934 dma_unmap_single(dev, adapter->stats_token, 935 sizeof(struct ibmvnic_statistics), 936 DMA_FROM_DEVICE); 937 adapter->stats_token = 0; 938 } 939 940 static int init_stats_token(struct ibmvnic_adapter *adapter) 941 { 942 struct device *dev = &adapter->vdev->dev; 943 dma_addr_t stok; 944 int rc; 945 946 stok = dma_map_single(dev, &adapter->stats, 947 sizeof(struct ibmvnic_statistics), 948 DMA_FROM_DEVICE); 949 rc = dma_mapping_error(dev, stok); 950 if (rc) { 951 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 952 return rc; 953 } 954 955 adapter->stats_token = stok; 956 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 957 return 0; 958 } 959 960 /** 961 * release_rx_pools() - Release any rx pools attached to @adapter. 962 * @adapter: ibmvnic adapter 963 * 964 * Safe to call this multiple times - even if no pools are attached. 965 */ 966 static void release_rx_pools(struct ibmvnic_adapter *adapter) 967 { 968 struct ibmvnic_rx_pool *rx_pool; 969 int i, j; 970 971 if (!adapter->rx_pool) 972 return; 973 974 for (i = 0; i < adapter->num_active_rx_pools; i++) { 975 rx_pool = &adapter->rx_pool[i]; 976 977 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 978 979 kfree(rx_pool->free_map); 980 981 free_ltb_set(adapter, &rx_pool->ltb_set); 982 983 if (!rx_pool->rx_buff) 984 continue; 985 986 for (j = 0; j < rx_pool->size; j++) { 987 if (rx_pool->rx_buff[j].skb) { 988 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 989 rx_pool->rx_buff[j].skb = NULL; 990 } 991 } 992 993 kfree(rx_pool->rx_buff); 994 } 995 996 kfree(adapter->rx_pool); 997 adapter->rx_pool = NULL; 998 adapter->num_active_rx_pools = 0; 999 adapter->prev_rx_pool_size = 0; 1000 } 1001 1002 /** 1003 * reuse_rx_pools() - Check if the existing rx pools can be reused. 1004 * @adapter: ibmvnic adapter 1005 * 1006 * Check if the existing rx pools in the adapter can be reused. The 1007 * pools can be reused if the pool parameters (number of pools, 1008 * number of buffers in the pool and size of each buffer) have not 1009 * changed. 1010 * 1011 * NOTE: This assumes that all pools have the same number of buffers 1012 * which is the case currently. If that changes, we must fix this. 1013 * 1014 * Return: true if the rx pools can be reused, false otherwise. 1015 */ 1016 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 1017 { 1018 u64 old_num_pools, new_num_pools; 1019 u64 old_pool_size, new_pool_size; 1020 u64 old_buff_size, new_buff_size; 1021 1022 if (!adapter->rx_pool) 1023 return false; 1024 1025 old_num_pools = adapter->num_active_rx_pools; 1026 new_num_pools = adapter->req_rx_queues; 1027 1028 old_pool_size = adapter->prev_rx_pool_size; 1029 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 1030 1031 old_buff_size = adapter->prev_rx_buf_sz; 1032 new_buff_size = adapter->cur_rx_buf_sz; 1033 1034 if (old_buff_size != new_buff_size || 1035 old_num_pools != new_num_pools || 1036 old_pool_size != new_pool_size) 1037 return false; 1038 1039 return true; 1040 } 1041 1042 /** 1043 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 1044 * @netdev: net device associated with the vnic interface 1045 * 1046 * Initialize the set of receiver pools in the ibmvnic adapter associated 1047 * with the net_device @netdev. If possible, reuse the existing rx pools. 1048 * Otherwise free any existing pools and allocate a new set of pools 1049 * before initializing them. 1050 * 1051 * Return: 0 on success and negative value on error. 1052 */ 1053 static int init_rx_pools(struct net_device *netdev) 1054 { 1055 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1056 struct device *dev = &adapter->vdev->dev; 1057 struct ibmvnic_rx_pool *rx_pool; 1058 u64 num_pools; 1059 u64 pool_size; /* # of buffers in one pool */ 1060 u64 buff_size; 1061 int i, j, rc; 1062 1063 pool_size = adapter->req_rx_add_entries_per_subcrq; 1064 num_pools = adapter->req_rx_queues; 1065 buff_size = adapter->cur_rx_buf_sz; 1066 1067 if (reuse_rx_pools(adapter)) { 1068 dev_dbg(dev, "Reusing rx pools\n"); 1069 goto update_ltb; 1070 } 1071 1072 /* Allocate/populate the pools. */ 1073 release_rx_pools(adapter); 1074 1075 adapter->rx_pool = kcalloc(num_pools, 1076 sizeof(struct ibmvnic_rx_pool), 1077 GFP_KERNEL); 1078 if (!adapter->rx_pool) { 1079 dev_err(dev, "Failed to allocate rx pools\n"); 1080 return -ENOMEM; 1081 } 1082 1083 /* Set num_active_rx_pools early. If we fail below after partial 1084 * allocation, release_rx_pools() will know how many to look for. 1085 */ 1086 adapter->num_active_rx_pools = num_pools; 1087 1088 for (i = 0; i < num_pools; i++) { 1089 rx_pool = &adapter->rx_pool[i]; 1090 1091 netdev_dbg(adapter->netdev, 1092 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 1093 i, pool_size, buff_size); 1094 1095 rx_pool->size = pool_size; 1096 rx_pool->index = i; 1097 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1098 1099 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 1100 GFP_KERNEL); 1101 if (!rx_pool->free_map) { 1102 dev_err(dev, "Couldn't alloc free_map %d\n", i); 1103 rc = -ENOMEM; 1104 goto out_release; 1105 } 1106 1107 rx_pool->rx_buff = kcalloc(rx_pool->size, 1108 sizeof(struct ibmvnic_rx_buff), 1109 GFP_KERNEL); 1110 if (!rx_pool->rx_buff) { 1111 dev_err(dev, "Couldn't alloc rx buffers\n"); 1112 rc = -ENOMEM; 1113 goto out_release; 1114 } 1115 } 1116 1117 adapter->prev_rx_pool_size = pool_size; 1118 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 1119 1120 update_ltb: 1121 for (i = 0; i < num_pools; i++) { 1122 rx_pool = &adapter->rx_pool[i]; 1123 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 1124 i, rx_pool->size, rx_pool->buff_size); 1125 1126 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, 1127 rx_pool->size, rx_pool->buff_size); 1128 if (rc) 1129 goto out; 1130 1131 for (j = 0; j < rx_pool->size; ++j) { 1132 struct ibmvnic_rx_buff *rx_buff; 1133 1134 rx_pool->free_map[j] = j; 1135 1136 /* NOTE: Don't clear rx_buff->skb here - will leak 1137 * memory! replenish_rx_pool() will reuse skbs or 1138 * allocate as necessary. 1139 */ 1140 rx_buff = &rx_pool->rx_buff[j]; 1141 rx_buff->dma = 0; 1142 rx_buff->data = 0; 1143 rx_buff->size = 0; 1144 rx_buff->pool_index = 0; 1145 } 1146 1147 /* Mark pool "empty" so replenish_rx_pools() will 1148 * update the LTB info for each buffer 1149 */ 1150 atomic_set(&rx_pool->available, 0); 1151 rx_pool->next_alloc = 0; 1152 rx_pool->next_free = 0; 1153 /* replenish_rx_pool() may have called deactivate_rx_pools() 1154 * on failover. Ensure pool is active now. 1155 */ 1156 rx_pool->active = 1; 1157 } 1158 return 0; 1159 out_release: 1160 release_rx_pools(adapter); 1161 out: 1162 /* We failed to allocate one or more LTBs or map them on the VIOS. 1163 * Hold onto the pools and any LTBs that we did allocate/map. 1164 */ 1165 return rc; 1166 } 1167 1168 static void release_vpd_data(struct ibmvnic_adapter *adapter) 1169 { 1170 if (!adapter->vpd) 1171 return; 1172 1173 kfree(adapter->vpd->buff); 1174 kfree(adapter->vpd); 1175 1176 adapter->vpd = NULL; 1177 } 1178 1179 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 1180 struct ibmvnic_tx_pool *tx_pool) 1181 { 1182 kfree(tx_pool->tx_buff); 1183 kfree(tx_pool->free_map); 1184 free_ltb_set(adapter, &tx_pool->ltb_set); 1185 } 1186 1187 /** 1188 * release_tx_pools() - Release any tx pools attached to @adapter. 1189 * @adapter: ibmvnic adapter 1190 * 1191 * Safe to call this multiple times - even if no pools are attached. 1192 */ 1193 static void release_tx_pools(struct ibmvnic_adapter *adapter) 1194 { 1195 int i; 1196 1197 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 1198 * both NULL or both non-NULL. So we only need to check one. 1199 */ 1200 if (!adapter->tx_pool) 1201 return; 1202 1203 for (i = 0; i < adapter->num_active_tx_pools; i++) { 1204 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 1205 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 1206 } 1207 1208 kfree(adapter->tx_pool); 1209 adapter->tx_pool = NULL; 1210 kfree(adapter->tso_pool); 1211 adapter->tso_pool = NULL; 1212 adapter->num_active_tx_pools = 0; 1213 adapter->prev_tx_pool_size = 0; 1214 } 1215 1216 static int init_one_tx_pool(struct net_device *netdev, 1217 struct ibmvnic_tx_pool *tx_pool, 1218 int pool_size, int buf_size) 1219 { 1220 int i; 1221 1222 tx_pool->tx_buff = kcalloc(pool_size, 1223 sizeof(struct ibmvnic_tx_buff), 1224 GFP_KERNEL); 1225 if (!tx_pool->tx_buff) 1226 return -ENOMEM; 1227 1228 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 1229 if (!tx_pool->free_map) { 1230 kfree(tx_pool->tx_buff); 1231 tx_pool->tx_buff = NULL; 1232 return -ENOMEM; 1233 } 1234 1235 for (i = 0; i < pool_size; i++) 1236 tx_pool->free_map[i] = i; 1237 1238 tx_pool->consumer_index = 0; 1239 tx_pool->producer_index = 0; 1240 tx_pool->num_buffers = pool_size; 1241 tx_pool->buf_size = buf_size; 1242 1243 return 0; 1244 } 1245 1246 /** 1247 * reuse_tx_pools() - Check if the existing tx pools can be reused. 1248 * @adapter: ibmvnic adapter 1249 * 1250 * Check if the existing tx pools in the adapter can be reused. The 1251 * pools can be reused if the pool parameters (number of pools, 1252 * number of buffers in the pool and mtu) have not changed. 1253 * 1254 * NOTE: This assumes that all pools have the same number of buffers 1255 * which is the case currently. If that changes, we must fix this. 1256 * 1257 * Return: true if the tx pools can be reused, false otherwise. 1258 */ 1259 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 1260 { 1261 u64 old_num_pools, new_num_pools; 1262 u64 old_pool_size, new_pool_size; 1263 u64 old_mtu, new_mtu; 1264 1265 if (!adapter->tx_pool) 1266 return false; 1267 1268 old_num_pools = adapter->num_active_tx_pools; 1269 new_num_pools = adapter->num_active_tx_scrqs; 1270 old_pool_size = adapter->prev_tx_pool_size; 1271 new_pool_size = adapter->req_tx_entries_per_subcrq; 1272 old_mtu = adapter->prev_mtu; 1273 new_mtu = adapter->req_mtu; 1274 1275 if (old_mtu != new_mtu || 1276 old_num_pools != new_num_pools || 1277 old_pool_size != new_pool_size) 1278 return false; 1279 1280 return true; 1281 } 1282 1283 /** 1284 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 1285 * @netdev: net device associated with the vnic interface 1286 * 1287 * Initialize the set of transmit pools in the ibmvnic adapter associated 1288 * with the net_device @netdev. If possible, reuse the existing tx pools. 1289 * Otherwise free any existing pools and allocate a new set of pools 1290 * before initializing them. 1291 * 1292 * Return: 0 on success and negative value on error. 1293 */ 1294 static int init_tx_pools(struct net_device *netdev) 1295 { 1296 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1297 struct device *dev = &adapter->vdev->dev; 1298 int num_pools; 1299 u64 pool_size; /* # of buffers in pool */ 1300 u64 buff_size; 1301 int i, j, rc; 1302 1303 num_pools = adapter->req_tx_queues; 1304 1305 /* We must notify the VIOS about the LTB on all resets - but we only 1306 * need to alloc/populate pools if either the number of buffers or 1307 * size of each buffer in the pool has changed. 1308 */ 1309 if (reuse_tx_pools(adapter)) { 1310 netdev_dbg(netdev, "Reusing tx pools\n"); 1311 goto update_ltb; 1312 } 1313 1314 /* Allocate/populate the pools. */ 1315 release_tx_pools(adapter); 1316 1317 pool_size = adapter->req_tx_entries_per_subcrq; 1318 num_pools = adapter->num_active_tx_scrqs; 1319 1320 adapter->tx_pool = kcalloc(num_pools, 1321 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1322 if (!adapter->tx_pool) 1323 return -ENOMEM; 1324 1325 adapter->tso_pool = kcalloc(num_pools, 1326 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1327 /* To simplify release_tx_pools() ensure that ->tx_pool and 1328 * ->tso_pool are either both NULL or both non-NULL. 1329 */ 1330 if (!adapter->tso_pool) { 1331 kfree(adapter->tx_pool); 1332 adapter->tx_pool = NULL; 1333 return -ENOMEM; 1334 } 1335 1336 /* Set num_active_tx_pools early. If we fail below after partial 1337 * allocation, release_tx_pools() will know how many to look for. 1338 */ 1339 adapter->num_active_tx_pools = num_pools; 1340 1341 buff_size = adapter->req_mtu + VLAN_HLEN; 1342 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1343 1344 for (i = 0; i < num_pools; i++) { 1345 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 1346 i, adapter->req_tx_entries_per_subcrq, buff_size); 1347 1348 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 1349 pool_size, buff_size); 1350 if (rc) 1351 goto out_release; 1352 1353 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 1354 IBMVNIC_TSO_BUFS, 1355 IBMVNIC_TSO_BUF_SZ); 1356 if (rc) 1357 goto out_release; 1358 } 1359 1360 adapter->prev_tx_pool_size = pool_size; 1361 adapter->prev_mtu = adapter->req_mtu; 1362 1363 update_ltb: 1364 /* NOTE: All tx_pools have the same number of buffers (which is 1365 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 1366 * buffers (see calls init_one_tx_pool() for these). 1367 * For consistency, we use tx_pool->num_buffers and 1368 * tso_pool->num_buffers below. 1369 */ 1370 rc = -1; 1371 for (i = 0; i < num_pools; i++) { 1372 struct ibmvnic_tx_pool *tso_pool; 1373 struct ibmvnic_tx_pool *tx_pool; 1374 1375 tx_pool = &adapter->tx_pool[i]; 1376 1377 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", 1378 i, tx_pool->num_buffers, tx_pool->buf_size); 1379 1380 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, 1381 tx_pool->num_buffers, tx_pool->buf_size); 1382 if (rc) 1383 goto out; 1384 1385 tx_pool->consumer_index = 0; 1386 tx_pool->producer_index = 0; 1387 1388 for (j = 0; j < tx_pool->num_buffers; j++) 1389 tx_pool->free_map[j] = j; 1390 1391 tso_pool = &adapter->tso_pool[i]; 1392 1393 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", 1394 i, tso_pool->num_buffers, tso_pool->buf_size); 1395 1396 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, 1397 tso_pool->num_buffers, tso_pool->buf_size); 1398 if (rc) 1399 goto out; 1400 1401 tso_pool->consumer_index = 0; 1402 tso_pool->producer_index = 0; 1403 1404 for (j = 0; j < tso_pool->num_buffers; j++) 1405 tso_pool->free_map[j] = j; 1406 } 1407 1408 return 0; 1409 out_release: 1410 release_tx_pools(adapter); 1411 out: 1412 /* We failed to allocate one or more LTBs or map them on the VIOS. 1413 * Hold onto the pools and any LTBs that we did allocate/map. 1414 */ 1415 return rc; 1416 } 1417 1418 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1419 { 1420 int i; 1421 1422 if (adapter->napi_enabled) 1423 return; 1424 1425 for (i = 0; i < adapter->req_rx_queues; i++) 1426 napi_enable(&adapter->napi[i]); 1427 1428 adapter->napi_enabled = true; 1429 } 1430 1431 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1432 { 1433 int i; 1434 1435 if (!adapter->napi_enabled) 1436 return; 1437 1438 for (i = 0; i < adapter->req_rx_queues; i++) { 1439 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1440 napi_disable(&adapter->napi[i]); 1441 } 1442 1443 adapter->napi_enabled = false; 1444 } 1445 1446 static int init_napi(struct ibmvnic_adapter *adapter) 1447 { 1448 int i; 1449 1450 adapter->napi = kcalloc(adapter->req_rx_queues, 1451 sizeof(struct napi_struct), GFP_KERNEL); 1452 if (!adapter->napi) 1453 return -ENOMEM; 1454 1455 for (i = 0; i < adapter->req_rx_queues; i++) { 1456 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1457 netif_napi_add(adapter->netdev, &adapter->napi[i], 1458 ibmvnic_poll); 1459 } 1460 1461 adapter->num_active_rx_napi = adapter->req_rx_queues; 1462 return 0; 1463 } 1464 1465 static void release_napi(struct ibmvnic_adapter *adapter) 1466 { 1467 int i; 1468 1469 if (!adapter->napi) 1470 return; 1471 1472 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1473 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1474 netif_napi_del(&adapter->napi[i]); 1475 } 1476 1477 kfree(adapter->napi); 1478 adapter->napi = NULL; 1479 adapter->num_active_rx_napi = 0; 1480 adapter->napi_enabled = false; 1481 } 1482 1483 static const char *adapter_state_to_string(enum vnic_state state) 1484 { 1485 switch (state) { 1486 case VNIC_PROBING: 1487 return "PROBING"; 1488 case VNIC_PROBED: 1489 return "PROBED"; 1490 case VNIC_OPENING: 1491 return "OPENING"; 1492 case VNIC_OPEN: 1493 return "OPEN"; 1494 case VNIC_CLOSING: 1495 return "CLOSING"; 1496 case VNIC_CLOSED: 1497 return "CLOSED"; 1498 case VNIC_REMOVING: 1499 return "REMOVING"; 1500 case VNIC_REMOVED: 1501 return "REMOVED"; 1502 case VNIC_DOWN: 1503 return "DOWN"; 1504 } 1505 return "UNKNOWN"; 1506 } 1507 1508 static int ibmvnic_login(struct net_device *netdev) 1509 { 1510 unsigned long flags, timeout = msecs_to_jiffies(20000); 1511 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1512 int retry_count = 0; 1513 int retries = 10; 1514 bool retry; 1515 int rc; 1516 1517 do { 1518 retry = false; 1519 if (retry_count > retries) { 1520 netdev_warn(netdev, "Login attempts exceeded\n"); 1521 return -EACCES; 1522 } 1523 1524 adapter->init_done_rc = 0; 1525 reinit_completion(&adapter->init_done); 1526 rc = send_login(adapter); 1527 if (rc) 1528 return rc; 1529 1530 if (!wait_for_completion_timeout(&adapter->init_done, 1531 timeout)) { 1532 netdev_warn(netdev, "Login timed out\n"); 1533 adapter->login_pending = false; 1534 goto partial_reset; 1535 } 1536 1537 if (adapter->init_done_rc == ABORTED) { 1538 netdev_warn(netdev, "Login aborted, retrying...\n"); 1539 retry = true; 1540 adapter->init_done_rc = 0; 1541 retry_count++; 1542 /* FW or device may be busy, so 1543 * wait a bit before retrying login 1544 */ 1545 msleep(500); 1546 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1547 retry_count++; 1548 release_sub_crqs(adapter, 1); 1549 1550 retry = true; 1551 netdev_dbg(netdev, 1552 "Received partial success, retrying...\n"); 1553 adapter->init_done_rc = 0; 1554 reinit_completion(&adapter->init_done); 1555 send_query_cap(adapter); 1556 if (!wait_for_completion_timeout(&adapter->init_done, 1557 timeout)) { 1558 netdev_warn(netdev, 1559 "Capabilities query timed out\n"); 1560 return -ETIMEDOUT; 1561 } 1562 1563 rc = init_sub_crqs(adapter); 1564 if (rc) { 1565 netdev_warn(netdev, 1566 "SCRQ initialization failed\n"); 1567 return rc; 1568 } 1569 1570 rc = init_sub_crq_irqs(adapter); 1571 if (rc) { 1572 netdev_warn(netdev, 1573 "SCRQ irq initialization failed\n"); 1574 return rc; 1575 } 1576 /* Default/timeout error handling, reset and start fresh */ 1577 } else if (adapter->init_done_rc) { 1578 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1579 adapter->init_done_rc); 1580 1581 partial_reset: 1582 /* adapter login failed, so free any CRQs or sub-CRQs 1583 * and register again before attempting to login again. 1584 * If we don't do this then the VIOS may think that 1585 * we are already logged in and reject any subsequent 1586 * attempts 1587 */ 1588 netdev_warn(netdev, 1589 "Freeing and re-registering CRQs before attempting to login again\n"); 1590 retry = true; 1591 adapter->init_done_rc = 0; 1592 release_sub_crqs(adapter, true); 1593 /* Much of this is similar logic as ibmvnic_probe(), 1594 * we are essentially re-initializing communication 1595 * with the server. We really should not run any 1596 * resets/failovers here because this is already a form 1597 * of reset and we do not want parallel resets occurring 1598 */ 1599 do { 1600 reinit_init_done(adapter); 1601 /* Clear any failovers we got in the previous 1602 * pass since we are re-initializing the CRQ 1603 */ 1604 adapter->failover_pending = false; 1605 release_crq_queue(adapter); 1606 /* If we don't sleep here then we risk an 1607 * unnecessary failover event from the VIOS. 1608 * This is a known VIOS issue caused by a vnic 1609 * device freeing and registering a CRQ too 1610 * quickly. 1611 */ 1612 msleep(1500); 1613 /* Avoid any resets, since we are currently 1614 * resetting. 1615 */ 1616 spin_lock_irqsave(&adapter->rwi_lock, flags); 1617 flush_reset_queue(adapter); 1618 spin_unlock_irqrestore(&adapter->rwi_lock, 1619 flags); 1620 1621 rc = init_crq_queue(adapter); 1622 if (rc) { 1623 netdev_err(netdev, "login recovery: init CRQ failed %d\n", 1624 rc); 1625 return -EIO; 1626 } 1627 1628 rc = ibmvnic_reset_init(adapter, false); 1629 if (rc) 1630 netdev_err(netdev, "login recovery: Reset init failed %d\n", 1631 rc); 1632 /* IBMVNIC_CRQ_INIT will return EAGAIN if it 1633 * fails, since ibmvnic_reset_init will free 1634 * irq's in failure, we won't be able to receive 1635 * new CRQs so we need to keep trying. probe() 1636 * handles this similarly. 1637 */ 1638 } while (rc == -EAGAIN && retry_count++ < retries); 1639 } 1640 } while (retry); 1641 1642 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1643 1644 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1645 return 0; 1646 } 1647 1648 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1649 { 1650 if (!adapter->login_buf) 1651 return; 1652 1653 dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token, 1654 adapter->login_buf_sz, DMA_TO_DEVICE); 1655 kfree(adapter->login_buf); 1656 adapter->login_buf = NULL; 1657 } 1658 1659 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1660 { 1661 if (!adapter->login_rsp_buf) 1662 return; 1663 1664 dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token, 1665 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 1666 kfree(adapter->login_rsp_buf); 1667 adapter->login_rsp_buf = NULL; 1668 } 1669 1670 static void release_resources(struct ibmvnic_adapter *adapter) 1671 { 1672 release_vpd_data(adapter); 1673 1674 release_napi(adapter); 1675 release_login_buffer(adapter); 1676 release_login_rsp_buffer(adapter); 1677 } 1678 1679 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1680 { 1681 struct net_device *netdev = adapter->netdev; 1682 unsigned long timeout = msecs_to_jiffies(20000); 1683 union ibmvnic_crq crq; 1684 bool resend; 1685 int rc; 1686 1687 netdev_dbg(netdev, "setting link state %d\n", link_state); 1688 1689 memset(&crq, 0, sizeof(crq)); 1690 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1691 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1692 crq.logical_link_state.link_state = link_state; 1693 1694 do { 1695 resend = false; 1696 1697 reinit_completion(&adapter->init_done); 1698 rc = ibmvnic_send_crq(adapter, &crq); 1699 if (rc) { 1700 netdev_err(netdev, "Failed to set link state\n"); 1701 return rc; 1702 } 1703 1704 if (!wait_for_completion_timeout(&adapter->init_done, 1705 timeout)) { 1706 netdev_err(netdev, "timeout setting link state\n"); 1707 return -ETIMEDOUT; 1708 } 1709 1710 if (adapter->init_done_rc == PARTIALSUCCESS) { 1711 /* Partuial success, delay and re-send */ 1712 mdelay(1000); 1713 resend = true; 1714 } else if (adapter->init_done_rc) { 1715 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1716 adapter->init_done_rc); 1717 return adapter->init_done_rc; 1718 } 1719 } while (resend); 1720 1721 return 0; 1722 } 1723 1724 static int set_real_num_queues(struct net_device *netdev) 1725 { 1726 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1727 int rc; 1728 1729 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1730 adapter->req_tx_queues, adapter->req_rx_queues); 1731 1732 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1733 if (rc) { 1734 netdev_err(netdev, "failed to set the number of tx queues\n"); 1735 return rc; 1736 } 1737 1738 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1739 if (rc) 1740 netdev_err(netdev, "failed to set the number of rx queues\n"); 1741 1742 return rc; 1743 } 1744 1745 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1746 { 1747 struct device *dev = &adapter->vdev->dev; 1748 union ibmvnic_crq crq; 1749 int len = 0; 1750 int rc; 1751 1752 if (adapter->vpd->buff) 1753 len = adapter->vpd->len; 1754 1755 mutex_lock(&adapter->fw_lock); 1756 adapter->fw_done_rc = 0; 1757 reinit_completion(&adapter->fw_done); 1758 1759 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1760 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1761 rc = ibmvnic_send_crq(adapter, &crq); 1762 if (rc) { 1763 mutex_unlock(&adapter->fw_lock); 1764 return rc; 1765 } 1766 1767 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1768 if (rc) { 1769 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1770 mutex_unlock(&adapter->fw_lock); 1771 return rc; 1772 } 1773 mutex_unlock(&adapter->fw_lock); 1774 1775 if (!adapter->vpd->len) 1776 return -ENODATA; 1777 1778 if (!adapter->vpd->buff) 1779 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1780 else if (adapter->vpd->len != len) 1781 adapter->vpd->buff = 1782 krealloc(adapter->vpd->buff, 1783 adapter->vpd->len, GFP_KERNEL); 1784 1785 if (!adapter->vpd->buff) { 1786 dev_err(dev, "Could allocate VPD buffer\n"); 1787 return -ENOMEM; 1788 } 1789 1790 adapter->vpd->dma_addr = 1791 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1792 DMA_FROM_DEVICE); 1793 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1794 dev_err(dev, "Could not map VPD buffer\n"); 1795 kfree(adapter->vpd->buff); 1796 adapter->vpd->buff = NULL; 1797 return -ENOMEM; 1798 } 1799 1800 mutex_lock(&adapter->fw_lock); 1801 adapter->fw_done_rc = 0; 1802 reinit_completion(&adapter->fw_done); 1803 1804 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1805 crq.get_vpd.cmd = GET_VPD; 1806 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1807 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1808 rc = ibmvnic_send_crq(adapter, &crq); 1809 if (rc) { 1810 kfree(adapter->vpd->buff); 1811 adapter->vpd->buff = NULL; 1812 mutex_unlock(&adapter->fw_lock); 1813 return rc; 1814 } 1815 1816 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1817 if (rc) { 1818 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1819 kfree(adapter->vpd->buff); 1820 adapter->vpd->buff = NULL; 1821 mutex_unlock(&adapter->fw_lock); 1822 return rc; 1823 } 1824 1825 mutex_unlock(&adapter->fw_lock); 1826 return 0; 1827 } 1828 1829 static int init_resources(struct ibmvnic_adapter *adapter) 1830 { 1831 struct net_device *netdev = adapter->netdev; 1832 int rc; 1833 1834 rc = set_real_num_queues(netdev); 1835 if (rc) 1836 return rc; 1837 1838 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1839 if (!adapter->vpd) 1840 return -ENOMEM; 1841 1842 /* Vital Product Data (VPD) */ 1843 rc = ibmvnic_get_vpd(adapter); 1844 if (rc) { 1845 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1846 return rc; 1847 } 1848 1849 rc = init_napi(adapter); 1850 if (rc) 1851 return rc; 1852 1853 send_query_map(adapter); 1854 1855 rc = init_rx_pools(netdev); 1856 if (rc) 1857 return rc; 1858 1859 rc = init_tx_pools(netdev); 1860 return rc; 1861 } 1862 1863 static int __ibmvnic_open(struct net_device *netdev) 1864 { 1865 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1866 enum vnic_state prev_state = adapter->state; 1867 int i, rc; 1868 1869 adapter->state = VNIC_OPENING; 1870 replenish_pools(adapter); 1871 ibmvnic_napi_enable(adapter); 1872 1873 /* We're ready to receive frames, enable the sub-crq interrupts and 1874 * set the logical link state to up 1875 */ 1876 for (i = 0; i < adapter->req_rx_queues; i++) { 1877 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1878 if (prev_state == VNIC_CLOSED) 1879 enable_irq(adapter->rx_scrq[i]->irq); 1880 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1881 } 1882 1883 for (i = 0; i < adapter->req_tx_queues; i++) { 1884 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1885 if (prev_state == VNIC_CLOSED) 1886 enable_irq(adapter->tx_scrq[i]->irq); 1887 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1888 /* netdev_tx_reset_queue will reset dql stats. During NON_FATAL 1889 * resets, don't reset the stats because there could be batched 1890 * skb's waiting to be sent. If we reset dql stats, we risk 1891 * num_completed being greater than num_queued. This will cause 1892 * a BUG_ON in dql_completed(). 1893 */ 1894 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) 1895 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1896 } 1897 1898 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1899 if (rc) { 1900 ibmvnic_napi_disable(adapter); 1901 ibmvnic_disable_irqs(adapter); 1902 return rc; 1903 } 1904 1905 adapter->tx_queues_active = true; 1906 1907 /* Since queues were stopped until now, there shouldn't be any 1908 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1909 * don't need the synchronize_rcu()? Leaving it for consistency 1910 * with setting ->tx_queues_active = false. 1911 */ 1912 synchronize_rcu(); 1913 1914 netif_tx_start_all_queues(netdev); 1915 1916 if (prev_state == VNIC_CLOSED) { 1917 for (i = 0; i < adapter->req_rx_queues; i++) 1918 napi_schedule(&adapter->napi[i]); 1919 } 1920 1921 adapter->state = VNIC_OPEN; 1922 return rc; 1923 } 1924 1925 static int ibmvnic_open(struct net_device *netdev) 1926 { 1927 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1928 int rc; 1929 1930 ASSERT_RTNL(); 1931 1932 /* If device failover is pending or we are about to reset, just set 1933 * device state and return. Device operation will be handled by reset 1934 * routine. 1935 * 1936 * It should be safe to overwrite the adapter->state here. Since 1937 * we hold the rtnl, either the reset has not actually started or 1938 * the rtnl got dropped during the set_link_state() in do_reset(). 1939 * In the former case, no one else is changing the state (again we 1940 * have the rtnl) and in the latter case, do_reset() will detect and 1941 * honor our setting below. 1942 */ 1943 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1944 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1945 adapter_state_to_string(adapter->state), 1946 adapter->failover_pending); 1947 adapter->state = VNIC_OPEN; 1948 rc = 0; 1949 goto out; 1950 } 1951 1952 if (adapter->state != VNIC_CLOSED) { 1953 rc = ibmvnic_login(netdev); 1954 if (rc) 1955 goto out; 1956 1957 rc = init_resources(adapter); 1958 if (rc) { 1959 netdev_err(netdev, "failed to initialize resources\n"); 1960 goto out; 1961 } 1962 } 1963 1964 rc = __ibmvnic_open(netdev); 1965 1966 out: 1967 /* If open failed and there is a pending failover or in-progress reset, 1968 * set device state and return. Device operation will be handled by 1969 * reset routine. See also comments above regarding rtnl. 1970 */ 1971 if (rc && 1972 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1973 adapter->state = VNIC_OPEN; 1974 rc = 0; 1975 } 1976 1977 if (rc) { 1978 release_resources(adapter); 1979 release_rx_pools(adapter); 1980 release_tx_pools(adapter); 1981 } 1982 1983 return rc; 1984 } 1985 1986 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1987 { 1988 struct ibmvnic_rx_pool *rx_pool; 1989 struct ibmvnic_rx_buff *rx_buff; 1990 u64 rx_entries; 1991 int rx_scrqs; 1992 int i, j; 1993 1994 if (!adapter->rx_pool) 1995 return; 1996 1997 rx_scrqs = adapter->num_active_rx_pools; 1998 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1999 2000 /* Free any remaining skbs in the rx buffer pools */ 2001 for (i = 0; i < rx_scrqs; i++) { 2002 rx_pool = &adapter->rx_pool[i]; 2003 if (!rx_pool || !rx_pool->rx_buff) 2004 continue; 2005 2006 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 2007 for (j = 0; j < rx_entries; j++) { 2008 rx_buff = &rx_pool->rx_buff[j]; 2009 if (rx_buff && rx_buff->skb) { 2010 dev_kfree_skb_any(rx_buff->skb); 2011 rx_buff->skb = NULL; 2012 } 2013 } 2014 } 2015 } 2016 2017 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 2018 struct ibmvnic_tx_pool *tx_pool) 2019 { 2020 struct ibmvnic_tx_buff *tx_buff; 2021 u64 tx_entries; 2022 int i; 2023 2024 if (!tx_pool || !tx_pool->tx_buff) 2025 return; 2026 2027 tx_entries = tx_pool->num_buffers; 2028 2029 for (i = 0; i < tx_entries; i++) { 2030 tx_buff = &tx_pool->tx_buff[i]; 2031 if (tx_buff && tx_buff->skb) { 2032 dev_kfree_skb_any(tx_buff->skb); 2033 tx_buff->skb = NULL; 2034 } 2035 } 2036 } 2037 2038 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 2039 { 2040 int tx_scrqs; 2041 int i; 2042 2043 if (!adapter->tx_pool || !adapter->tso_pool) 2044 return; 2045 2046 tx_scrqs = adapter->num_active_tx_pools; 2047 2048 /* Free any remaining skbs in the tx buffer pools */ 2049 for (i = 0; i < tx_scrqs; i++) { 2050 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 2051 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 2052 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 2053 } 2054 } 2055 2056 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 2057 { 2058 struct net_device *netdev = adapter->netdev; 2059 int i; 2060 2061 if (adapter->tx_scrq) { 2062 for (i = 0; i < adapter->req_tx_queues; i++) 2063 if (adapter->tx_scrq[i]->irq) { 2064 netdev_dbg(netdev, 2065 "Disabling tx_scrq[%d] irq\n", i); 2066 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 2067 disable_irq(adapter->tx_scrq[i]->irq); 2068 } 2069 } 2070 2071 if (adapter->rx_scrq) { 2072 for (i = 0; i < adapter->req_rx_queues; i++) { 2073 if (adapter->rx_scrq[i]->irq) { 2074 netdev_dbg(netdev, 2075 "Disabling rx_scrq[%d] irq\n", i); 2076 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 2077 disable_irq(adapter->rx_scrq[i]->irq); 2078 } 2079 } 2080 } 2081 } 2082 2083 static void ibmvnic_cleanup(struct net_device *netdev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2086 2087 /* ensure that transmissions are stopped if called by do_reset */ 2088 2089 adapter->tx_queues_active = false; 2090 2091 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 2092 * update so they don't restart a queue after we stop it below. 2093 */ 2094 synchronize_rcu(); 2095 2096 if (test_bit(0, &adapter->resetting)) 2097 netif_tx_disable(netdev); 2098 else 2099 netif_tx_stop_all_queues(netdev); 2100 2101 ibmvnic_napi_disable(adapter); 2102 ibmvnic_disable_irqs(adapter); 2103 } 2104 2105 static int __ibmvnic_close(struct net_device *netdev) 2106 { 2107 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2108 int rc = 0; 2109 2110 adapter->state = VNIC_CLOSING; 2111 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2112 adapter->state = VNIC_CLOSED; 2113 return rc; 2114 } 2115 2116 static int ibmvnic_close(struct net_device *netdev) 2117 { 2118 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2119 int rc; 2120 2121 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 2122 adapter_state_to_string(adapter->state), 2123 adapter->failover_pending, 2124 adapter->force_reset_recovery); 2125 2126 /* If device failover is pending, just set device state and return. 2127 * Device operation will be handled by reset routine. 2128 */ 2129 if (adapter->failover_pending) { 2130 adapter->state = VNIC_CLOSED; 2131 return 0; 2132 } 2133 2134 rc = __ibmvnic_close(netdev); 2135 ibmvnic_cleanup(netdev); 2136 clean_rx_pools(adapter); 2137 clean_tx_pools(adapter); 2138 2139 return rc; 2140 } 2141 2142 /** 2143 * build_hdr_data - creates L2/L3/L4 header data buffer 2144 * @hdr_field: bitfield determining needed headers 2145 * @skb: socket buffer 2146 * @hdr_len: array of header lengths 2147 * @hdr_data: buffer to write the header to 2148 * 2149 * Reads hdr_field to determine which headers are needed by firmware. 2150 * Builds a buffer containing these headers. Saves individual header 2151 * lengths and total buffer length to be used to build descriptors. 2152 */ 2153 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 2154 int *hdr_len, u8 *hdr_data) 2155 { 2156 int len = 0; 2157 u8 *hdr; 2158 2159 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 2160 hdr_len[0] = sizeof(struct vlan_ethhdr); 2161 else 2162 hdr_len[0] = sizeof(struct ethhdr); 2163 2164 if (skb->protocol == htons(ETH_P_IP)) { 2165 hdr_len[1] = ip_hdr(skb)->ihl * 4; 2166 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2167 hdr_len[2] = tcp_hdrlen(skb); 2168 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 2169 hdr_len[2] = sizeof(struct udphdr); 2170 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2171 hdr_len[1] = sizeof(struct ipv6hdr); 2172 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2173 hdr_len[2] = tcp_hdrlen(skb); 2174 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 2175 hdr_len[2] = sizeof(struct udphdr); 2176 } else if (skb->protocol == htons(ETH_P_ARP)) { 2177 hdr_len[1] = arp_hdr_len(skb->dev); 2178 hdr_len[2] = 0; 2179 } 2180 2181 memset(hdr_data, 0, 120); 2182 if ((hdr_field >> 6) & 1) { 2183 hdr = skb_mac_header(skb); 2184 memcpy(hdr_data, hdr, hdr_len[0]); 2185 len += hdr_len[0]; 2186 } 2187 2188 if ((hdr_field >> 5) & 1) { 2189 hdr = skb_network_header(skb); 2190 memcpy(hdr_data + len, hdr, hdr_len[1]); 2191 len += hdr_len[1]; 2192 } 2193 2194 if ((hdr_field >> 4) & 1) { 2195 hdr = skb_transport_header(skb); 2196 memcpy(hdr_data + len, hdr, hdr_len[2]); 2197 len += hdr_len[2]; 2198 } 2199 return len; 2200 } 2201 2202 /** 2203 * create_hdr_descs - create header and header extension descriptors 2204 * @hdr_field: bitfield determining needed headers 2205 * @hdr_data: buffer containing header data 2206 * @len: length of data buffer 2207 * @hdr_len: array of individual header lengths 2208 * @scrq_arr: descriptor array 2209 * 2210 * Creates header and, if needed, header extension descriptors and 2211 * places them in a descriptor array, scrq_arr 2212 */ 2213 2214 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 2215 union sub_crq *scrq_arr) 2216 { 2217 union sub_crq hdr_desc; 2218 int tmp_len = len; 2219 int num_descs = 0; 2220 u8 *data, *cur; 2221 int tmp; 2222 2223 while (tmp_len > 0) { 2224 cur = hdr_data + len - tmp_len; 2225 2226 memset(&hdr_desc, 0, sizeof(hdr_desc)); 2227 if (cur != hdr_data) { 2228 data = hdr_desc.hdr_ext.data; 2229 tmp = tmp_len > 29 ? 29 : tmp_len; 2230 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 2231 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 2232 hdr_desc.hdr_ext.len = tmp; 2233 } else { 2234 data = hdr_desc.hdr.data; 2235 tmp = tmp_len > 24 ? 24 : tmp_len; 2236 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 2237 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 2238 hdr_desc.hdr.len = tmp; 2239 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 2240 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 2241 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 2242 hdr_desc.hdr.flag = hdr_field << 1; 2243 } 2244 memcpy(data, cur, tmp); 2245 tmp_len -= tmp; 2246 *scrq_arr = hdr_desc; 2247 scrq_arr++; 2248 num_descs++; 2249 } 2250 2251 return num_descs; 2252 } 2253 2254 /** 2255 * build_hdr_descs_arr - build a header descriptor array 2256 * @skb: tx socket buffer 2257 * @indir_arr: indirect array 2258 * @num_entries: number of descriptors to be sent 2259 * @hdr_field: bit field determining which headers will be sent 2260 * 2261 * This function will build a TX descriptor array with applicable 2262 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 2263 */ 2264 2265 static void build_hdr_descs_arr(struct sk_buff *skb, 2266 union sub_crq *indir_arr, 2267 int *num_entries, u8 hdr_field) 2268 { 2269 int hdr_len[3] = {0, 0, 0}; 2270 u8 hdr_data[140] = {0}; 2271 int tot_len; 2272 2273 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 2274 hdr_data); 2275 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 2276 indir_arr + 1); 2277 } 2278 2279 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 2280 struct net_device *netdev) 2281 { 2282 /* For some backing devices, mishandling of small packets 2283 * can result in a loss of connection or TX stall. Device 2284 * architects recommend that no packet should be smaller 2285 * than the minimum MTU value provided to the driver, so 2286 * pad any packets to that length 2287 */ 2288 if (skb->len < netdev->min_mtu) 2289 return skb_put_padto(skb, netdev->min_mtu); 2290 2291 return 0; 2292 } 2293 2294 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 2295 struct ibmvnic_sub_crq_queue *tx_scrq) 2296 { 2297 struct ibmvnic_ind_xmit_queue *ind_bufp; 2298 struct ibmvnic_tx_buff *tx_buff; 2299 struct ibmvnic_tx_pool *tx_pool; 2300 union sub_crq tx_scrq_entry; 2301 int queue_num; 2302 int entries; 2303 int index; 2304 int i; 2305 2306 ind_bufp = &tx_scrq->ind_buf; 2307 entries = (u64)ind_bufp->index; 2308 queue_num = tx_scrq->pool_index; 2309 2310 for (i = entries - 1; i >= 0; --i) { 2311 tx_scrq_entry = ind_bufp->indir_arr[i]; 2312 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 2313 continue; 2314 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 2315 if (index & IBMVNIC_TSO_POOL_MASK) { 2316 tx_pool = &adapter->tso_pool[queue_num]; 2317 index &= ~IBMVNIC_TSO_POOL_MASK; 2318 } else { 2319 tx_pool = &adapter->tx_pool[queue_num]; 2320 } 2321 tx_pool->free_map[tx_pool->consumer_index] = index; 2322 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2323 tx_pool->num_buffers - 1 : 2324 tx_pool->consumer_index - 1; 2325 tx_buff = &tx_pool->tx_buff[index]; 2326 adapter->netdev->stats.tx_packets--; 2327 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 2328 adapter->tx_stats_buffers[queue_num].packets--; 2329 adapter->tx_stats_buffers[queue_num].bytes -= 2330 tx_buff->skb->len; 2331 dev_kfree_skb_any(tx_buff->skb); 2332 tx_buff->skb = NULL; 2333 adapter->netdev->stats.tx_dropped++; 2334 } 2335 2336 ind_bufp->index = 0; 2337 2338 if (atomic_sub_return(entries, &tx_scrq->used) <= 2339 (adapter->req_tx_entries_per_subcrq / 2) && 2340 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 2341 rcu_read_lock(); 2342 2343 if (adapter->tx_queues_active) { 2344 netif_wake_subqueue(adapter->netdev, queue_num); 2345 netdev_dbg(adapter->netdev, "Started queue %d\n", 2346 queue_num); 2347 } 2348 2349 rcu_read_unlock(); 2350 } 2351 } 2352 2353 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 2354 struct ibmvnic_sub_crq_queue *tx_scrq) 2355 { 2356 struct ibmvnic_ind_xmit_queue *ind_bufp; 2357 u64 dma_addr; 2358 u64 entries; 2359 u64 handle; 2360 int rc; 2361 2362 ind_bufp = &tx_scrq->ind_buf; 2363 dma_addr = (u64)ind_bufp->indir_dma; 2364 entries = (u64)ind_bufp->index; 2365 handle = tx_scrq->handle; 2366 2367 if (!entries) 2368 return 0; 2369 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 2370 if (rc) 2371 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 2372 else 2373 ind_bufp->index = 0; 2374 return 0; 2375 } 2376 2377 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 2378 { 2379 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2380 int queue_num = skb_get_queue_mapping(skb); 2381 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 2382 struct device *dev = &adapter->vdev->dev; 2383 struct ibmvnic_ind_xmit_queue *ind_bufp; 2384 struct ibmvnic_tx_buff *tx_buff = NULL; 2385 struct ibmvnic_sub_crq_queue *tx_scrq; 2386 struct ibmvnic_long_term_buff *ltb; 2387 struct ibmvnic_tx_pool *tx_pool; 2388 unsigned int tx_send_failed = 0; 2389 netdev_tx_t ret = NETDEV_TX_OK; 2390 unsigned int tx_map_failed = 0; 2391 union sub_crq indir_arr[16]; 2392 unsigned int tx_dropped = 0; 2393 unsigned int tx_packets = 0; 2394 unsigned int tx_bytes = 0; 2395 dma_addr_t data_dma_addr; 2396 struct netdev_queue *txq; 2397 unsigned long lpar_rc; 2398 union sub_crq tx_crq; 2399 unsigned int offset; 2400 int num_entries = 1; 2401 unsigned char *dst; 2402 int bufidx = 0; 2403 u8 proto = 0; 2404 2405 /* If a reset is in progress, drop the packet since 2406 * the scrqs may get torn down. Otherwise use the 2407 * rcu to ensure reset waits for us to complete. 2408 */ 2409 rcu_read_lock(); 2410 if (!adapter->tx_queues_active) { 2411 dev_kfree_skb_any(skb); 2412 2413 tx_send_failed++; 2414 tx_dropped++; 2415 ret = NETDEV_TX_OK; 2416 goto out; 2417 } 2418 2419 tx_scrq = adapter->tx_scrq[queue_num]; 2420 txq = netdev_get_tx_queue(netdev, queue_num); 2421 ind_bufp = &tx_scrq->ind_buf; 2422 2423 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2424 tx_dropped++; 2425 tx_send_failed++; 2426 ret = NETDEV_TX_OK; 2427 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2428 goto out; 2429 } 2430 2431 if (skb_is_gso(skb)) 2432 tx_pool = &adapter->tso_pool[queue_num]; 2433 else 2434 tx_pool = &adapter->tx_pool[queue_num]; 2435 2436 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2437 2438 if (bufidx == IBMVNIC_INVALID_MAP) { 2439 dev_kfree_skb_any(skb); 2440 tx_send_failed++; 2441 tx_dropped++; 2442 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2443 ret = NETDEV_TX_OK; 2444 goto out; 2445 } 2446 2447 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2448 2449 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2450 2451 dst = ltb->buff + offset; 2452 memset(dst, 0, tx_pool->buf_size); 2453 data_dma_addr = ltb->addr + offset; 2454 2455 if (skb_shinfo(skb)->nr_frags) { 2456 int cur, i; 2457 2458 /* Copy the head */ 2459 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2460 cur = skb_headlen(skb); 2461 2462 /* Copy the frags */ 2463 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2464 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2465 2466 memcpy(dst + cur, skb_frag_address(frag), 2467 skb_frag_size(frag)); 2468 cur += skb_frag_size(frag); 2469 } 2470 } else { 2471 skb_copy_from_linear_data(skb, dst, skb->len); 2472 } 2473 2474 /* post changes to long_term_buff *dst before VIOS accessing it */ 2475 dma_wmb(); 2476 2477 tx_pool->consumer_index = 2478 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2479 2480 tx_buff = &tx_pool->tx_buff[bufidx]; 2481 tx_buff->skb = skb; 2482 tx_buff->index = bufidx; 2483 tx_buff->pool_index = queue_num; 2484 2485 memset(&tx_crq, 0, sizeof(tx_crq)); 2486 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2487 tx_crq.v1.type = IBMVNIC_TX_DESC; 2488 tx_crq.v1.n_crq_elem = 1; 2489 tx_crq.v1.n_sge = 1; 2490 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2491 2492 if (skb_is_gso(skb)) 2493 tx_crq.v1.correlator = 2494 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2495 else 2496 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2497 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2498 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2499 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2500 2501 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2502 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2503 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2504 } 2505 2506 if (skb->protocol == htons(ETH_P_IP)) { 2507 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2508 proto = ip_hdr(skb)->protocol; 2509 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2510 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2511 proto = ipv6_hdr(skb)->nexthdr; 2512 } 2513 2514 if (proto == IPPROTO_TCP) 2515 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2516 else if (proto == IPPROTO_UDP) 2517 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2518 2519 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2520 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2521 hdrs += 2; 2522 } 2523 if (skb_is_gso(skb)) { 2524 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2525 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2526 hdrs += 2; 2527 } 2528 2529 if ((*hdrs >> 7) & 1) 2530 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2531 2532 tx_crq.v1.n_crq_elem = num_entries; 2533 tx_buff->num_entries = num_entries; 2534 /* flush buffer if current entry can not fit */ 2535 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2536 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2537 if (lpar_rc != H_SUCCESS) 2538 goto tx_flush_err; 2539 } 2540 2541 indir_arr[0] = tx_crq; 2542 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2543 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2544 ind_bufp->index += num_entries; 2545 if (__netdev_tx_sent_queue(txq, skb->len, 2546 netdev_xmit_more() && 2547 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2548 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2549 if (lpar_rc != H_SUCCESS) 2550 goto tx_err; 2551 } 2552 2553 if (atomic_add_return(num_entries, &tx_scrq->used) 2554 >= adapter->req_tx_entries_per_subcrq) { 2555 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2556 netif_stop_subqueue(netdev, queue_num); 2557 } 2558 2559 tx_packets++; 2560 tx_bytes += skb->len; 2561 txq_trans_cond_update(txq); 2562 ret = NETDEV_TX_OK; 2563 goto out; 2564 2565 tx_flush_err: 2566 dev_kfree_skb_any(skb); 2567 tx_buff->skb = NULL; 2568 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2569 tx_pool->num_buffers - 1 : 2570 tx_pool->consumer_index - 1; 2571 tx_dropped++; 2572 tx_err: 2573 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2574 dev_err_ratelimited(dev, "tx: send failed\n"); 2575 2576 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2577 /* Disable TX and report carrier off if queue is closed 2578 * or pending failover. 2579 * Firmware guarantees that a signal will be sent to the 2580 * driver, triggering a reset or some other action. 2581 */ 2582 netif_tx_stop_all_queues(netdev); 2583 netif_carrier_off(netdev); 2584 } 2585 out: 2586 rcu_read_unlock(); 2587 netdev->stats.tx_dropped += tx_dropped; 2588 netdev->stats.tx_bytes += tx_bytes; 2589 netdev->stats.tx_packets += tx_packets; 2590 adapter->tx_send_failed += tx_send_failed; 2591 adapter->tx_map_failed += tx_map_failed; 2592 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2593 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2594 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2595 2596 return ret; 2597 } 2598 2599 static void ibmvnic_set_multi(struct net_device *netdev) 2600 { 2601 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2602 struct netdev_hw_addr *ha; 2603 union ibmvnic_crq crq; 2604 2605 memset(&crq, 0, sizeof(crq)); 2606 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2607 crq.request_capability.cmd = REQUEST_CAPABILITY; 2608 2609 if (netdev->flags & IFF_PROMISC) { 2610 if (!adapter->promisc_supported) 2611 return; 2612 } else { 2613 if (netdev->flags & IFF_ALLMULTI) { 2614 /* Accept all multicast */ 2615 memset(&crq, 0, sizeof(crq)); 2616 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2617 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2618 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2619 ibmvnic_send_crq(adapter, &crq); 2620 } else if (netdev_mc_empty(netdev)) { 2621 /* Reject all multicast */ 2622 memset(&crq, 0, sizeof(crq)); 2623 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2624 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2625 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2626 ibmvnic_send_crq(adapter, &crq); 2627 } else { 2628 /* Accept one or more multicast(s) */ 2629 netdev_for_each_mc_addr(ha, netdev) { 2630 memset(&crq, 0, sizeof(crq)); 2631 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2632 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2633 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2634 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2635 ha->addr); 2636 ibmvnic_send_crq(adapter, &crq); 2637 } 2638 } 2639 } 2640 } 2641 2642 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2643 { 2644 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2645 union ibmvnic_crq crq; 2646 int rc; 2647 2648 if (!is_valid_ether_addr(dev_addr)) { 2649 rc = -EADDRNOTAVAIL; 2650 goto err; 2651 } 2652 2653 memset(&crq, 0, sizeof(crq)); 2654 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2655 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2656 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2657 2658 mutex_lock(&adapter->fw_lock); 2659 adapter->fw_done_rc = 0; 2660 reinit_completion(&adapter->fw_done); 2661 2662 rc = ibmvnic_send_crq(adapter, &crq); 2663 if (rc) { 2664 rc = -EIO; 2665 mutex_unlock(&adapter->fw_lock); 2666 goto err; 2667 } 2668 2669 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2670 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2671 if (rc || adapter->fw_done_rc) { 2672 rc = -EIO; 2673 mutex_unlock(&adapter->fw_lock); 2674 goto err; 2675 } 2676 mutex_unlock(&adapter->fw_lock); 2677 return 0; 2678 err: 2679 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2680 return rc; 2681 } 2682 2683 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2684 { 2685 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2686 struct sockaddr *addr = p; 2687 int rc; 2688 2689 rc = 0; 2690 if (!is_valid_ether_addr(addr->sa_data)) 2691 return -EADDRNOTAVAIL; 2692 2693 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2694 if (adapter->state != VNIC_PROBED) 2695 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2696 2697 return rc; 2698 } 2699 2700 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2701 { 2702 switch (reason) { 2703 case VNIC_RESET_FAILOVER: 2704 return "FAILOVER"; 2705 case VNIC_RESET_MOBILITY: 2706 return "MOBILITY"; 2707 case VNIC_RESET_FATAL: 2708 return "FATAL"; 2709 case VNIC_RESET_NON_FATAL: 2710 return "NON_FATAL"; 2711 case VNIC_RESET_TIMEOUT: 2712 return "TIMEOUT"; 2713 case VNIC_RESET_CHANGE_PARAM: 2714 return "CHANGE_PARAM"; 2715 case VNIC_RESET_PASSIVE_INIT: 2716 return "PASSIVE_INIT"; 2717 } 2718 return "UNKNOWN"; 2719 } 2720 2721 /* 2722 * Initialize the init_done completion and return code values. We 2723 * can get a transport event just after registering the CRQ and the 2724 * tasklet will use this to communicate the transport event. To ensure 2725 * we don't miss the notification/error, initialize these _before_ 2726 * regisering the CRQ. 2727 */ 2728 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2729 { 2730 reinit_completion(&adapter->init_done); 2731 adapter->init_done_rc = 0; 2732 } 2733 2734 /* 2735 * do_reset returns zero if we are able to keep processing reset events, or 2736 * non-zero if we hit a fatal error and must halt. 2737 */ 2738 static int do_reset(struct ibmvnic_adapter *adapter, 2739 struct ibmvnic_rwi *rwi, u32 reset_state) 2740 { 2741 struct net_device *netdev = adapter->netdev; 2742 u64 old_num_rx_queues, old_num_tx_queues; 2743 u64 old_num_rx_slots, old_num_tx_slots; 2744 int rc; 2745 2746 netdev_dbg(adapter->netdev, 2747 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2748 adapter_state_to_string(adapter->state), 2749 adapter->failover_pending, 2750 reset_reason_to_string(rwi->reset_reason), 2751 adapter_state_to_string(reset_state)); 2752 2753 adapter->reset_reason = rwi->reset_reason; 2754 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2755 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2756 rtnl_lock(); 2757 2758 /* Now that we have the rtnl lock, clear any pending failover. 2759 * This will ensure ibmvnic_open() has either completed or will 2760 * block until failover is complete. 2761 */ 2762 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2763 adapter->failover_pending = false; 2764 2765 /* read the state and check (again) after getting rtnl */ 2766 reset_state = adapter->state; 2767 2768 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2769 rc = -EBUSY; 2770 goto out; 2771 } 2772 2773 netif_carrier_off(netdev); 2774 2775 old_num_rx_queues = adapter->req_rx_queues; 2776 old_num_tx_queues = adapter->req_tx_queues; 2777 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2778 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2779 2780 ibmvnic_cleanup(netdev); 2781 2782 if (reset_state == VNIC_OPEN && 2783 adapter->reset_reason != VNIC_RESET_MOBILITY && 2784 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2785 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2786 rc = __ibmvnic_close(netdev); 2787 if (rc) 2788 goto out; 2789 } else { 2790 adapter->state = VNIC_CLOSING; 2791 2792 /* Release the RTNL lock before link state change and 2793 * re-acquire after the link state change to allow 2794 * linkwatch_event to grab the RTNL lock and run during 2795 * a reset. 2796 */ 2797 rtnl_unlock(); 2798 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2799 rtnl_lock(); 2800 if (rc) 2801 goto out; 2802 2803 if (adapter->state == VNIC_OPEN) { 2804 /* When we dropped rtnl, ibmvnic_open() got 2805 * it and noticed that we are resetting and 2806 * set the adapter state to OPEN. Update our 2807 * new "target" state, and resume the reset 2808 * from VNIC_CLOSING state. 2809 */ 2810 netdev_dbg(netdev, 2811 "Open changed state from %s, updating.\n", 2812 adapter_state_to_string(reset_state)); 2813 reset_state = VNIC_OPEN; 2814 adapter->state = VNIC_CLOSING; 2815 } 2816 2817 if (adapter->state != VNIC_CLOSING) { 2818 /* If someone else changed the adapter state 2819 * when we dropped the rtnl, fail the reset 2820 */ 2821 rc = -EAGAIN; 2822 goto out; 2823 } 2824 adapter->state = VNIC_CLOSED; 2825 } 2826 } 2827 2828 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2829 release_resources(adapter); 2830 release_sub_crqs(adapter, 1); 2831 release_crq_queue(adapter); 2832 } 2833 2834 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2835 /* remove the closed state so when we call open it appears 2836 * we are coming from the probed state. 2837 */ 2838 adapter->state = VNIC_PROBED; 2839 2840 reinit_init_done(adapter); 2841 2842 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2843 rc = init_crq_queue(adapter); 2844 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2845 rc = ibmvnic_reenable_crq_queue(adapter); 2846 release_sub_crqs(adapter, 1); 2847 } else { 2848 rc = ibmvnic_reset_crq(adapter); 2849 if (rc == H_CLOSED || rc == H_SUCCESS) { 2850 rc = vio_enable_interrupts(adapter->vdev); 2851 if (rc) 2852 netdev_err(adapter->netdev, 2853 "Reset failed to enable interrupts. rc=%d\n", 2854 rc); 2855 } 2856 } 2857 2858 if (rc) { 2859 netdev_err(adapter->netdev, 2860 "Reset couldn't initialize crq. rc=%d\n", rc); 2861 goto out; 2862 } 2863 2864 rc = ibmvnic_reset_init(adapter, true); 2865 if (rc) 2866 goto out; 2867 2868 /* If the adapter was in PROBE or DOWN state prior to the reset, 2869 * exit here. 2870 */ 2871 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2872 rc = 0; 2873 goto out; 2874 } 2875 2876 rc = ibmvnic_login(netdev); 2877 if (rc) 2878 goto out; 2879 2880 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2881 rc = init_resources(adapter); 2882 if (rc) 2883 goto out; 2884 } else if (adapter->req_rx_queues != old_num_rx_queues || 2885 adapter->req_tx_queues != old_num_tx_queues || 2886 adapter->req_rx_add_entries_per_subcrq != 2887 old_num_rx_slots || 2888 adapter->req_tx_entries_per_subcrq != 2889 old_num_tx_slots || 2890 !adapter->rx_pool || 2891 !adapter->tso_pool || 2892 !adapter->tx_pool) { 2893 release_napi(adapter); 2894 release_vpd_data(adapter); 2895 2896 rc = init_resources(adapter); 2897 if (rc) 2898 goto out; 2899 2900 } else { 2901 rc = init_tx_pools(netdev); 2902 if (rc) { 2903 netdev_dbg(netdev, 2904 "init tx pools failed (%d)\n", 2905 rc); 2906 goto out; 2907 } 2908 2909 rc = init_rx_pools(netdev); 2910 if (rc) { 2911 netdev_dbg(netdev, 2912 "init rx pools failed (%d)\n", 2913 rc); 2914 goto out; 2915 } 2916 } 2917 ibmvnic_disable_irqs(adapter); 2918 } 2919 adapter->state = VNIC_CLOSED; 2920 2921 if (reset_state == VNIC_CLOSED) { 2922 rc = 0; 2923 goto out; 2924 } 2925 2926 rc = __ibmvnic_open(netdev); 2927 if (rc) { 2928 rc = IBMVNIC_OPEN_FAILED; 2929 goto out; 2930 } 2931 2932 /* refresh device's multicast list */ 2933 ibmvnic_set_multi(netdev); 2934 2935 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2936 adapter->reset_reason == VNIC_RESET_MOBILITY) 2937 __netdev_notify_peers(netdev); 2938 2939 rc = 0; 2940 2941 out: 2942 /* restore the adapter state if reset failed */ 2943 if (rc) 2944 adapter->state = reset_state; 2945 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2946 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2947 rtnl_unlock(); 2948 2949 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2950 adapter_state_to_string(adapter->state), 2951 adapter->failover_pending, rc); 2952 return rc; 2953 } 2954 2955 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2956 struct ibmvnic_rwi *rwi, u32 reset_state) 2957 { 2958 struct net_device *netdev = adapter->netdev; 2959 int rc; 2960 2961 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2962 reset_reason_to_string(rwi->reset_reason)); 2963 2964 /* read the state and check (again) after getting rtnl */ 2965 reset_state = adapter->state; 2966 2967 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2968 rc = -EBUSY; 2969 goto out; 2970 } 2971 2972 netif_carrier_off(netdev); 2973 adapter->reset_reason = rwi->reset_reason; 2974 2975 ibmvnic_cleanup(netdev); 2976 release_resources(adapter); 2977 release_sub_crqs(adapter, 0); 2978 release_crq_queue(adapter); 2979 2980 /* remove the closed state so when we call open it appears 2981 * we are coming from the probed state. 2982 */ 2983 adapter->state = VNIC_PROBED; 2984 2985 reinit_init_done(adapter); 2986 2987 rc = init_crq_queue(adapter); 2988 if (rc) { 2989 netdev_err(adapter->netdev, 2990 "Couldn't initialize crq. rc=%d\n", rc); 2991 goto out; 2992 } 2993 2994 rc = ibmvnic_reset_init(adapter, false); 2995 if (rc) 2996 goto out; 2997 2998 /* If the adapter was in PROBE or DOWN state prior to the reset, 2999 * exit here. 3000 */ 3001 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3002 goto out; 3003 3004 rc = ibmvnic_login(netdev); 3005 if (rc) 3006 goto out; 3007 3008 rc = init_resources(adapter); 3009 if (rc) 3010 goto out; 3011 3012 ibmvnic_disable_irqs(adapter); 3013 adapter->state = VNIC_CLOSED; 3014 3015 if (reset_state == VNIC_CLOSED) 3016 goto out; 3017 3018 rc = __ibmvnic_open(netdev); 3019 if (rc) { 3020 rc = IBMVNIC_OPEN_FAILED; 3021 goto out; 3022 } 3023 3024 __netdev_notify_peers(netdev); 3025 out: 3026 /* restore adapter state if reset failed */ 3027 if (rc) 3028 adapter->state = reset_state; 3029 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3030 adapter_state_to_string(adapter->state), 3031 adapter->failover_pending, rc); 3032 return rc; 3033 } 3034 3035 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3036 { 3037 struct ibmvnic_rwi *rwi; 3038 unsigned long flags; 3039 3040 spin_lock_irqsave(&adapter->rwi_lock, flags); 3041 3042 if (!list_empty(&adapter->rwi_list)) { 3043 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3044 list); 3045 list_del(&rwi->list); 3046 } else { 3047 rwi = NULL; 3048 } 3049 3050 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3051 return rwi; 3052 } 3053 3054 /** 3055 * do_passive_init - complete probing when partner device is detected. 3056 * @adapter: ibmvnic_adapter struct 3057 * 3058 * If the ibmvnic device does not have a partner device to communicate with at boot 3059 * and that partner device comes online at a later time, this function is called 3060 * to complete the initialization process of ibmvnic device. 3061 * Caller is expected to hold rtnl_lock(). 3062 * 3063 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3064 * in the down state. 3065 * Returns 0 upon success and the device is in PROBED state. 3066 */ 3067 3068 static int do_passive_init(struct ibmvnic_adapter *adapter) 3069 { 3070 unsigned long timeout = msecs_to_jiffies(30000); 3071 struct net_device *netdev = adapter->netdev; 3072 struct device *dev = &adapter->vdev->dev; 3073 int rc; 3074 3075 netdev_dbg(netdev, "Partner device found, probing.\n"); 3076 3077 adapter->state = VNIC_PROBING; 3078 reinit_completion(&adapter->init_done); 3079 adapter->init_done_rc = 0; 3080 adapter->crq.active = true; 3081 3082 rc = send_crq_init_complete(adapter); 3083 if (rc) 3084 goto out; 3085 3086 rc = send_version_xchg(adapter); 3087 if (rc) 3088 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3089 3090 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3091 dev_err(dev, "Initialization sequence timed out\n"); 3092 rc = -ETIMEDOUT; 3093 goto out; 3094 } 3095 3096 rc = init_sub_crqs(adapter); 3097 if (rc) { 3098 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3099 goto out; 3100 } 3101 3102 rc = init_sub_crq_irqs(adapter); 3103 if (rc) { 3104 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3105 goto init_failed; 3106 } 3107 3108 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3109 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3110 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3111 3112 adapter->state = VNIC_PROBED; 3113 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3114 3115 return 0; 3116 3117 init_failed: 3118 release_sub_crqs(adapter, 1); 3119 out: 3120 adapter->state = VNIC_DOWN; 3121 return rc; 3122 } 3123 3124 static void __ibmvnic_reset(struct work_struct *work) 3125 { 3126 struct ibmvnic_adapter *adapter; 3127 unsigned int timeout = 5000; 3128 struct ibmvnic_rwi *tmprwi; 3129 bool saved_state = false; 3130 struct ibmvnic_rwi *rwi; 3131 unsigned long flags; 3132 struct device *dev; 3133 bool need_reset; 3134 int num_fails = 0; 3135 u32 reset_state; 3136 int rc = 0; 3137 3138 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3139 dev = &adapter->vdev->dev; 3140 3141 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3142 * or if another reset is in progress, defer work for now. If probe 3143 * eventually fails it will flush and terminate our work. 3144 * 3145 * Three possibilities here: 3146 * 1. Adpater being removed - just return 3147 * 2. Timed out on probe or another reset in progress - delay the work 3148 * 3. Completed probe - perform any resets in queue 3149 */ 3150 if (adapter->state == VNIC_PROBING && 3151 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3152 dev_err(dev, "Reset thread timed out on probe"); 3153 queue_delayed_work(system_long_wq, 3154 &adapter->ibmvnic_delayed_reset, 3155 IBMVNIC_RESET_DELAY); 3156 return; 3157 } 3158 3159 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3160 if (adapter->state == VNIC_REMOVING) 3161 return; 3162 3163 /* ->rwi_list is stable now (no one else is removing entries) */ 3164 3165 /* ibmvnic_probe() may have purged the reset queue after we were 3166 * scheduled to process a reset so there maybe no resets to process. 3167 * Before setting the ->resetting bit though, we have to make sure 3168 * that there is infact a reset to process. Otherwise we may race 3169 * with ibmvnic_open() and end up leaving the vnic down: 3170 * 3171 * __ibmvnic_reset() ibmvnic_open() 3172 * ----------------- -------------- 3173 * 3174 * set ->resetting bit 3175 * find ->resetting bit is set 3176 * set ->state to IBMVNIC_OPEN (i.e 3177 * assume reset will open device) 3178 * return 3179 * find reset queue empty 3180 * return 3181 * 3182 * Neither performed vnic login/open and vnic stays down 3183 * 3184 * If we hold the lock and conditionally set the bit, either we 3185 * or ibmvnic_open() will complete the open. 3186 */ 3187 need_reset = false; 3188 spin_lock(&adapter->rwi_lock); 3189 if (!list_empty(&adapter->rwi_list)) { 3190 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3191 queue_delayed_work(system_long_wq, 3192 &adapter->ibmvnic_delayed_reset, 3193 IBMVNIC_RESET_DELAY); 3194 } else { 3195 need_reset = true; 3196 } 3197 } 3198 spin_unlock(&adapter->rwi_lock); 3199 3200 if (!need_reset) 3201 return; 3202 3203 rwi = get_next_rwi(adapter); 3204 while (rwi) { 3205 spin_lock_irqsave(&adapter->state_lock, flags); 3206 3207 if (adapter->state == VNIC_REMOVING || 3208 adapter->state == VNIC_REMOVED) { 3209 spin_unlock_irqrestore(&adapter->state_lock, flags); 3210 kfree(rwi); 3211 rc = EBUSY; 3212 break; 3213 } 3214 3215 if (!saved_state) { 3216 reset_state = adapter->state; 3217 saved_state = true; 3218 } 3219 spin_unlock_irqrestore(&adapter->state_lock, flags); 3220 3221 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3222 rtnl_lock(); 3223 rc = do_passive_init(adapter); 3224 rtnl_unlock(); 3225 if (!rc) 3226 netif_carrier_on(adapter->netdev); 3227 } else if (adapter->force_reset_recovery) { 3228 /* Since we are doing a hard reset now, clear the 3229 * failover_pending flag so we don't ignore any 3230 * future MOBILITY or other resets. 3231 */ 3232 adapter->failover_pending = false; 3233 3234 /* Transport event occurred during previous reset */ 3235 if (adapter->wait_for_reset) { 3236 /* Previous was CHANGE_PARAM; caller locked */ 3237 adapter->force_reset_recovery = false; 3238 rc = do_hard_reset(adapter, rwi, reset_state); 3239 } else { 3240 rtnl_lock(); 3241 adapter->force_reset_recovery = false; 3242 rc = do_hard_reset(adapter, rwi, reset_state); 3243 rtnl_unlock(); 3244 } 3245 if (rc) 3246 num_fails++; 3247 else 3248 num_fails = 0; 3249 3250 /* If auto-priority-failover is enabled we can get 3251 * back to back failovers during resets, resulting 3252 * in at least two failed resets (from high-priority 3253 * backing device to low-priority one and then back) 3254 * If resets continue to fail beyond that, give the 3255 * adapter some time to settle down before retrying. 3256 */ 3257 if (num_fails >= 3) { 3258 netdev_dbg(adapter->netdev, 3259 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3260 adapter_state_to_string(adapter->state), 3261 num_fails); 3262 set_current_state(TASK_UNINTERRUPTIBLE); 3263 schedule_timeout(60 * HZ); 3264 } 3265 } else { 3266 rc = do_reset(adapter, rwi, reset_state); 3267 } 3268 tmprwi = rwi; 3269 adapter->last_reset_time = jiffies; 3270 3271 if (rc) 3272 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3273 3274 rwi = get_next_rwi(adapter); 3275 3276 /* 3277 * If there are no resets queued and the previous reset failed, 3278 * the adapter would be in an undefined state. So retry the 3279 * previous reset as a hard reset. 3280 * 3281 * Else, free the previous rwi and, if there is another reset 3282 * queued, process the new reset even if previous reset failed 3283 * (the previous reset could have failed because of a fail 3284 * over for instance, so process the fail over). 3285 */ 3286 if (!rwi && rc) 3287 rwi = tmprwi; 3288 else 3289 kfree(tmprwi); 3290 3291 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3292 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3293 adapter->force_reset_recovery = true; 3294 } 3295 3296 if (adapter->wait_for_reset) { 3297 adapter->reset_done_rc = rc; 3298 complete(&adapter->reset_done); 3299 } 3300 3301 clear_bit_unlock(0, &adapter->resetting); 3302 3303 netdev_dbg(adapter->netdev, 3304 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3305 adapter_state_to_string(adapter->state), 3306 adapter->force_reset_recovery, 3307 adapter->wait_for_reset); 3308 } 3309 3310 static void __ibmvnic_delayed_reset(struct work_struct *work) 3311 { 3312 struct ibmvnic_adapter *adapter; 3313 3314 adapter = container_of(work, struct ibmvnic_adapter, 3315 ibmvnic_delayed_reset.work); 3316 __ibmvnic_reset(&adapter->ibmvnic_reset); 3317 } 3318 3319 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3320 { 3321 struct list_head *entry, *tmp_entry; 3322 3323 if (!list_empty(&adapter->rwi_list)) { 3324 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3325 list_del(entry); 3326 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3327 } 3328 } 3329 } 3330 3331 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3332 enum ibmvnic_reset_reason reason) 3333 { 3334 struct net_device *netdev = adapter->netdev; 3335 struct ibmvnic_rwi *rwi, *tmp; 3336 unsigned long flags; 3337 int ret; 3338 3339 spin_lock_irqsave(&adapter->rwi_lock, flags); 3340 3341 /* If failover is pending don't schedule any other reset. 3342 * Instead let the failover complete. If there is already a 3343 * a failover reset scheduled, we will detect and drop the 3344 * duplicate reset when walking the ->rwi_list below. 3345 */ 3346 if (adapter->state == VNIC_REMOVING || 3347 adapter->state == VNIC_REMOVED || 3348 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3349 ret = EBUSY; 3350 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3351 goto err; 3352 } 3353 3354 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3355 if (tmp->reset_reason == reason) { 3356 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3357 reset_reason_to_string(reason)); 3358 ret = EBUSY; 3359 goto err; 3360 } 3361 } 3362 3363 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3364 if (!rwi) { 3365 ret = ENOMEM; 3366 goto err; 3367 } 3368 /* if we just received a transport event, 3369 * flush reset queue and process this reset 3370 */ 3371 if (adapter->force_reset_recovery) 3372 flush_reset_queue(adapter); 3373 3374 rwi->reset_reason = reason; 3375 list_add_tail(&rwi->list, &adapter->rwi_list); 3376 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3377 reset_reason_to_string(reason)); 3378 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3379 3380 ret = 0; 3381 err: 3382 /* ibmvnic_close() below can block, so drop the lock first */ 3383 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3384 3385 if (ret == ENOMEM) 3386 ibmvnic_close(netdev); 3387 3388 return -ret; 3389 } 3390 3391 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3392 { 3393 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3394 3395 if (test_bit(0, &adapter->resetting)) { 3396 netdev_err(adapter->netdev, 3397 "Adapter is resetting, skip timeout reset\n"); 3398 return; 3399 } 3400 /* No queuing up reset until at least 5 seconds (default watchdog val) 3401 * after last reset 3402 */ 3403 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3404 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3405 return; 3406 } 3407 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3408 } 3409 3410 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3411 struct ibmvnic_rx_buff *rx_buff) 3412 { 3413 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3414 3415 rx_buff->skb = NULL; 3416 3417 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3418 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3419 3420 atomic_dec(&pool->available); 3421 } 3422 3423 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3424 { 3425 struct ibmvnic_sub_crq_queue *rx_scrq; 3426 struct ibmvnic_adapter *adapter; 3427 struct net_device *netdev; 3428 int frames_processed; 3429 int scrq_num; 3430 3431 netdev = napi->dev; 3432 adapter = netdev_priv(netdev); 3433 scrq_num = (int)(napi - adapter->napi); 3434 frames_processed = 0; 3435 rx_scrq = adapter->rx_scrq[scrq_num]; 3436 3437 restart_poll: 3438 while (frames_processed < budget) { 3439 struct sk_buff *skb; 3440 struct ibmvnic_rx_buff *rx_buff; 3441 union sub_crq *next; 3442 u32 length; 3443 u16 offset; 3444 u8 flags = 0; 3445 3446 if (unlikely(test_bit(0, &adapter->resetting) && 3447 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3448 enable_scrq_irq(adapter, rx_scrq); 3449 napi_complete_done(napi, frames_processed); 3450 return frames_processed; 3451 } 3452 3453 if (!pending_scrq(adapter, rx_scrq)) 3454 break; 3455 next = ibmvnic_next_scrq(adapter, rx_scrq); 3456 rx_buff = (struct ibmvnic_rx_buff *) 3457 be64_to_cpu(next->rx_comp.correlator); 3458 /* do error checking */ 3459 if (next->rx_comp.rc) { 3460 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3461 be16_to_cpu(next->rx_comp.rc)); 3462 /* free the entry */ 3463 next->rx_comp.first = 0; 3464 dev_kfree_skb_any(rx_buff->skb); 3465 remove_buff_from_pool(adapter, rx_buff); 3466 continue; 3467 } else if (!rx_buff->skb) { 3468 /* free the entry */ 3469 next->rx_comp.first = 0; 3470 remove_buff_from_pool(adapter, rx_buff); 3471 continue; 3472 } 3473 3474 length = be32_to_cpu(next->rx_comp.len); 3475 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3476 flags = next->rx_comp.flags; 3477 skb = rx_buff->skb; 3478 /* load long_term_buff before copying to skb */ 3479 dma_rmb(); 3480 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3481 length); 3482 3483 /* VLAN Header has been stripped by the system firmware and 3484 * needs to be inserted by the driver 3485 */ 3486 if (adapter->rx_vlan_header_insertion && 3487 (flags & IBMVNIC_VLAN_STRIPPED)) 3488 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3489 ntohs(next->rx_comp.vlan_tci)); 3490 3491 /* free the entry */ 3492 next->rx_comp.first = 0; 3493 remove_buff_from_pool(adapter, rx_buff); 3494 3495 skb_put(skb, length); 3496 skb->protocol = eth_type_trans(skb, netdev); 3497 skb_record_rx_queue(skb, scrq_num); 3498 3499 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3500 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3501 skb->ip_summed = CHECKSUM_UNNECESSARY; 3502 } 3503 3504 length = skb->len; 3505 napi_gro_receive(napi, skb); /* send it up */ 3506 netdev->stats.rx_packets++; 3507 netdev->stats.rx_bytes += length; 3508 adapter->rx_stats_buffers[scrq_num].packets++; 3509 adapter->rx_stats_buffers[scrq_num].bytes += length; 3510 frames_processed++; 3511 } 3512 3513 if (adapter->state != VNIC_CLOSING && 3514 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 3515 adapter->req_rx_add_entries_per_subcrq / 2) || 3516 frames_processed < budget)) 3517 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3518 if (frames_processed < budget) { 3519 if (napi_complete_done(napi, frames_processed)) { 3520 enable_scrq_irq(adapter, rx_scrq); 3521 if (pending_scrq(adapter, rx_scrq)) { 3522 if (napi_schedule(napi)) { 3523 disable_scrq_irq(adapter, rx_scrq); 3524 goto restart_poll; 3525 } 3526 } 3527 } 3528 } 3529 return frames_processed; 3530 } 3531 3532 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3533 { 3534 int rc, ret; 3535 3536 adapter->fallback.mtu = adapter->req_mtu; 3537 adapter->fallback.rx_queues = adapter->req_rx_queues; 3538 adapter->fallback.tx_queues = adapter->req_tx_queues; 3539 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3540 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3541 3542 reinit_completion(&adapter->reset_done); 3543 adapter->wait_for_reset = true; 3544 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3545 3546 if (rc) { 3547 ret = rc; 3548 goto out; 3549 } 3550 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3551 if (rc) { 3552 ret = -ENODEV; 3553 goto out; 3554 } 3555 3556 ret = 0; 3557 if (adapter->reset_done_rc) { 3558 ret = -EIO; 3559 adapter->desired.mtu = adapter->fallback.mtu; 3560 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3561 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3562 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3563 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3564 3565 reinit_completion(&adapter->reset_done); 3566 adapter->wait_for_reset = true; 3567 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3568 if (rc) { 3569 ret = rc; 3570 goto out; 3571 } 3572 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3573 60000); 3574 if (rc) { 3575 ret = -ENODEV; 3576 goto out; 3577 } 3578 } 3579 out: 3580 adapter->wait_for_reset = false; 3581 3582 return ret; 3583 } 3584 3585 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3586 { 3587 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3588 3589 adapter->desired.mtu = new_mtu + ETH_HLEN; 3590 3591 return wait_for_reset(adapter); 3592 } 3593 3594 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3595 struct net_device *dev, 3596 netdev_features_t features) 3597 { 3598 /* Some backing hardware adapters can not 3599 * handle packets with a MSS less than 224 3600 * or with only one segment. 3601 */ 3602 if (skb_is_gso(skb)) { 3603 if (skb_shinfo(skb)->gso_size < 224 || 3604 skb_shinfo(skb)->gso_segs == 1) 3605 features &= ~NETIF_F_GSO_MASK; 3606 } 3607 3608 return features; 3609 } 3610 3611 static const struct net_device_ops ibmvnic_netdev_ops = { 3612 .ndo_open = ibmvnic_open, 3613 .ndo_stop = ibmvnic_close, 3614 .ndo_start_xmit = ibmvnic_xmit, 3615 .ndo_set_rx_mode = ibmvnic_set_multi, 3616 .ndo_set_mac_address = ibmvnic_set_mac, 3617 .ndo_validate_addr = eth_validate_addr, 3618 .ndo_tx_timeout = ibmvnic_tx_timeout, 3619 .ndo_change_mtu = ibmvnic_change_mtu, 3620 .ndo_features_check = ibmvnic_features_check, 3621 }; 3622 3623 /* ethtool functions */ 3624 3625 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3626 struct ethtool_link_ksettings *cmd) 3627 { 3628 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3629 int rc; 3630 3631 rc = send_query_phys_parms(adapter); 3632 if (rc) { 3633 adapter->speed = SPEED_UNKNOWN; 3634 adapter->duplex = DUPLEX_UNKNOWN; 3635 } 3636 cmd->base.speed = adapter->speed; 3637 cmd->base.duplex = adapter->duplex; 3638 cmd->base.port = PORT_FIBRE; 3639 cmd->base.phy_address = 0; 3640 cmd->base.autoneg = AUTONEG_ENABLE; 3641 3642 return 0; 3643 } 3644 3645 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3646 struct ethtool_drvinfo *info) 3647 { 3648 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3649 3650 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3651 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3652 strscpy(info->fw_version, adapter->fw_version, 3653 sizeof(info->fw_version)); 3654 } 3655 3656 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3657 { 3658 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3659 3660 return adapter->msg_enable; 3661 } 3662 3663 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3664 { 3665 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3666 3667 adapter->msg_enable = data; 3668 } 3669 3670 static u32 ibmvnic_get_link(struct net_device *netdev) 3671 { 3672 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3673 3674 /* Don't need to send a query because we request a logical link up at 3675 * init and then we wait for link state indications 3676 */ 3677 return adapter->logical_link_state; 3678 } 3679 3680 static void ibmvnic_get_ringparam(struct net_device *netdev, 3681 struct ethtool_ringparam *ring, 3682 struct kernel_ethtool_ringparam *kernel_ring, 3683 struct netlink_ext_ack *extack) 3684 { 3685 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3686 3687 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3688 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3689 ring->rx_mini_max_pending = 0; 3690 ring->rx_jumbo_max_pending = 0; 3691 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3692 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3693 ring->rx_mini_pending = 0; 3694 ring->rx_jumbo_pending = 0; 3695 } 3696 3697 static int ibmvnic_set_ringparam(struct net_device *netdev, 3698 struct ethtool_ringparam *ring, 3699 struct kernel_ethtool_ringparam *kernel_ring, 3700 struct netlink_ext_ack *extack) 3701 { 3702 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3703 3704 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3705 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3706 netdev_err(netdev, "Invalid request.\n"); 3707 netdev_err(netdev, "Max tx buffers = %llu\n", 3708 adapter->max_rx_add_entries_per_subcrq); 3709 netdev_err(netdev, "Max rx buffers = %llu\n", 3710 adapter->max_tx_entries_per_subcrq); 3711 return -EINVAL; 3712 } 3713 3714 adapter->desired.rx_entries = ring->rx_pending; 3715 adapter->desired.tx_entries = ring->tx_pending; 3716 3717 return wait_for_reset(adapter); 3718 } 3719 3720 static void ibmvnic_get_channels(struct net_device *netdev, 3721 struct ethtool_channels *channels) 3722 { 3723 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3724 3725 channels->max_rx = adapter->max_rx_queues; 3726 channels->max_tx = adapter->max_tx_queues; 3727 channels->max_other = 0; 3728 channels->max_combined = 0; 3729 channels->rx_count = adapter->req_rx_queues; 3730 channels->tx_count = adapter->req_tx_queues; 3731 channels->other_count = 0; 3732 channels->combined_count = 0; 3733 } 3734 3735 static int ibmvnic_set_channels(struct net_device *netdev, 3736 struct ethtool_channels *channels) 3737 { 3738 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3739 3740 adapter->desired.rx_queues = channels->rx_count; 3741 adapter->desired.tx_queues = channels->tx_count; 3742 3743 return wait_for_reset(adapter); 3744 } 3745 3746 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3747 { 3748 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3749 int i; 3750 3751 if (stringset != ETH_SS_STATS) 3752 return; 3753 3754 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 3755 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3756 3757 for (i = 0; i < adapter->req_tx_queues; i++) { 3758 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3759 data += ETH_GSTRING_LEN; 3760 3761 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3762 data += ETH_GSTRING_LEN; 3763 3764 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 3765 data += ETH_GSTRING_LEN; 3766 } 3767 3768 for (i = 0; i < adapter->req_rx_queues; i++) { 3769 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3770 data += ETH_GSTRING_LEN; 3771 3772 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3773 data += ETH_GSTRING_LEN; 3774 3775 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3776 data += ETH_GSTRING_LEN; 3777 } 3778 } 3779 3780 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3781 { 3782 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3783 3784 switch (sset) { 3785 case ETH_SS_STATS: 3786 return ARRAY_SIZE(ibmvnic_stats) + 3787 adapter->req_tx_queues * NUM_TX_STATS + 3788 adapter->req_rx_queues * NUM_RX_STATS; 3789 default: 3790 return -EOPNOTSUPP; 3791 } 3792 } 3793 3794 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3795 struct ethtool_stats *stats, u64 *data) 3796 { 3797 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3798 union ibmvnic_crq crq; 3799 int i, j; 3800 int rc; 3801 3802 memset(&crq, 0, sizeof(crq)); 3803 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3804 crq.request_statistics.cmd = REQUEST_STATISTICS; 3805 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3806 crq.request_statistics.len = 3807 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3808 3809 /* Wait for data to be written */ 3810 reinit_completion(&adapter->stats_done); 3811 rc = ibmvnic_send_crq(adapter, &crq); 3812 if (rc) 3813 return; 3814 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3815 if (rc) 3816 return; 3817 3818 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3819 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3820 (adapter, ibmvnic_stats[i].offset)); 3821 3822 for (j = 0; j < adapter->req_tx_queues; j++) { 3823 data[i] = adapter->tx_stats_buffers[j].packets; 3824 i++; 3825 data[i] = adapter->tx_stats_buffers[j].bytes; 3826 i++; 3827 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3828 i++; 3829 } 3830 3831 for (j = 0; j < adapter->req_rx_queues; j++) { 3832 data[i] = adapter->rx_stats_buffers[j].packets; 3833 i++; 3834 data[i] = adapter->rx_stats_buffers[j].bytes; 3835 i++; 3836 data[i] = adapter->rx_stats_buffers[j].interrupts; 3837 i++; 3838 } 3839 } 3840 3841 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3842 .get_drvinfo = ibmvnic_get_drvinfo, 3843 .get_msglevel = ibmvnic_get_msglevel, 3844 .set_msglevel = ibmvnic_set_msglevel, 3845 .get_link = ibmvnic_get_link, 3846 .get_ringparam = ibmvnic_get_ringparam, 3847 .set_ringparam = ibmvnic_set_ringparam, 3848 .get_channels = ibmvnic_get_channels, 3849 .set_channels = ibmvnic_set_channels, 3850 .get_strings = ibmvnic_get_strings, 3851 .get_sset_count = ibmvnic_get_sset_count, 3852 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3853 .get_link_ksettings = ibmvnic_get_link_ksettings, 3854 }; 3855 3856 /* Routines for managing CRQs/sCRQs */ 3857 3858 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3859 struct ibmvnic_sub_crq_queue *scrq) 3860 { 3861 int rc; 3862 3863 if (!scrq) { 3864 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3865 return -EINVAL; 3866 } 3867 3868 if (scrq->irq) { 3869 free_irq(scrq->irq, scrq); 3870 irq_dispose_mapping(scrq->irq); 3871 scrq->irq = 0; 3872 } 3873 3874 if (scrq->msgs) { 3875 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3876 atomic_set(&scrq->used, 0); 3877 scrq->cur = 0; 3878 scrq->ind_buf.index = 0; 3879 } else { 3880 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3881 return -EINVAL; 3882 } 3883 3884 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3885 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3886 return rc; 3887 } 3888 3889 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3890 { 3891 int i, rc; 3892 3893 if (!adapter->tx_scrq || !adapter->rx_scrq) 3894 return -EINVAL; 3895 3896 ibmvnic_clean_affinity(adapter); 3897 3898 for (i = 0; i < adapter->req_tx_queues; i++) { 3899 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3900 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3901 if (rc) 3902 return rc; 3903 } 3904 3905 for (i = 0; i < adapter->req_rx_queues; i++) { 3906 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3907 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3908 if (rc) 3909 return rc; 3910 } 3911 3912 return rc; 3913 } 3914 3915 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3916 struct ibmvnic_sub_crq_queue *scrq, 3917 bool do_h_free) 3918 { 3919 struct device *dev = &adapter->vdev->dev; 3920 long rc; 3921 3922 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3923 3924 if (do_h_free) { 3925 /* Close the sub-crqs */ 3926 do { 3927 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3928 adapter->vdev->unit_address, 3929 scrq->crq_num); 3930 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3931 3932 if (rc) { 3933 netdev_err(adapter->netdev, 3934 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3935 scrq->crq_num, rc); 3936 } 3937 } 3938 3939 dma_free_coherent(dev, 3940 IBMVNIC_IND_ARR_SZ, 3941 scrq->ind_buf.indir_arr, 3942 scrq->ind_buf.indir_dma); 3943 3944 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3945 DMA_BIDIRECTIONAL); 3946 free_pages((unsigned long)scrq->msgs, 2); 3947 free_cpumask_var(scrq->affinity_mask); 3948 kfree(scrq); 3949 } 3950 3951 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3952 *adapter) 3953 { 3954 struct device *dev = &adapter->vdev->dev; 3955 struct ibmvnic_sub_crq_queue *scrq; 3956 int rc; 3957 3958 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3959 if (!scrq) 3960 return NULL; 3961 3962 scrq->msgs = 3963 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3964 if (!scrq->msgs) { 3965 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3966 goto zero_page_failed; 3967 } 3968 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 3969 goto cpumask_alloc_failed; 3970 3971 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3972 DMA_BIDIRECTIONAL); 3973 if (dma_mapping_error(dev, scrq->msg_token)) { 3974 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3975 goto map_failed; 3976 } 3977 3978 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3979 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3980 3981 if (rc == H_RESOURCE) 3982 rc = ibmvnic_reset_crq(adapter); 3983 3984 if (rc == H_CLOSED) { 3985 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3986 } else if (rc) { 3987 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3988 goto reg_failed; 3989 } 3990 3991 scrq->adapter = adapter; 3992 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3993 scrq->ind_buf.index = 0; 3994 3995 scrq->ind_buf.indir_arr = 3996 dma_alloc_coherent(dev, 3997 IBMVNIC_IND_ARR_SZ, 3998 &scrq->ind_buf.indir_dma, 3999 GFP_KERNEL); 4000 4001 if (!scrq->ind_buf.indir_arr) 4002 goto indir_failed; 4003 4004 spin_lock_init(&scrq->lock); 4005 4006 netdev_dbg(adapter->netdev, 4007 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4008 scrq->crq_num, scrq->hw_irq, scrq->irq); 4009 4010 return scrq; 4011 4012 indir_failed: 4013 do { 4014 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4015 adapter->vdev->unit_address, 4016 scrq->crq_num); 4017 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4018 reg_failed: 4019 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4020 DMA_BIDIRECTIONAL); 4021 map_failed: 4022 free_cpumask_var(scrq->affinity_mask); 4023 cpumask_alloc_failed: 4024 free_pages((unsigned long)scrq->msgs, 2); 4025 zero_page_failed: 4026 kfree(scrq); 4027 4028 return NULL; 4029 } 4030 4031 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4032 { 4033 int i; 4034 4035 ibmvnic_clean_affinity(adapter); 4036 if (adapter->tx_scrq) { 4037 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4038 if (!adapter->tx_scrq[i]) 4039 continue; 4040 4041 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4042 i); 4043 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4044 if (adapter->tx_scrq[i]->irq) { 4045 free_irq(adapter->tx_scrq[i]->irq, 4046 adapter->tx_scrq[i]); 4047 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4048 adapter->tx_scrq[i]->irq = 0; 4049 } 4050 4051 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4052 do_h_free); 4053 } 4054 4055 kfree(adapter->tx_scrq); 4056 adapter->tx_scrq = NULL; 4057 adapter->num_active_tx_scrqs = 0; 4058 } 4059 4060 if (adapter->rx_scrq) { 4061 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4062 if (!adapter->rx_scrq[i]) 4063 continue; 4064 4065 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4066 i); 4067 if (adapter->rx_scrq[i]->irq) { 4068 free_irq(adapter->rx_scrq[i]->irq, 4069 adapter->rx_scrq[i]); 4070 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4071 adapter->rx_scrq[i]->irq = 0; 4072 } 4073 4074 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4075 do_h_free); 4076 } 4077 4078 kfree(adapter->rx_scrq); 4079 adapter->rx_scrq = NULL; 4080 adapter->num_active_rx_scrqs = 0; 4081 } 4082 } 4083 4084 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4085 struct ibmvnic_sub_crq_queue *scrq) 4086 { 4087 struct device *dev = &adapter->vdev->dev; 4088 unsigned long rc; 4089 4090 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4091 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4092 if (rc) 4093 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4094 scrq->hw_irq, rc); 4095 return rc; 4096 } 4097 4098 /* We can not use the IRQ chip EOI handler because that has the 4099 * unintended effect of changing the interrupt priority. 4100 */ 4101 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4102 { 4103 u64 val = 0xff000000 | scrq->hw_irq; 4104 unsigned long rc; 4105 4106 rc = plpar_hcall_norets(H_EOI, val); 4107 if (rc) 4108 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4109 } 4110 4111 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4112 * transmit or receive queue just prior to a partition migration. 4113 * Force an EOI after migration. 4114 */ 4115 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4116 struct ibmvnic_sub_crq_queue *scrq) 4117 { 4118 if (!xive_enabled()) 4119 ibmvnic_xics_eoi(dev, scrq); 4120 } 4121 4122 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4123 struct ibmvnic_sub_crq_queue *scrq) 4124 { 4125 struct device *dev = &adapter->vdev->dev; 4126 unsigned long rc; 4127 4128 if (scrq->hw_irq > 0x100000000ULL) { 4129 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4130 return 1; 4131 } 4132 4133 if (test_bit(0, &adapter->resetting) && 4134 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4135 ibmvnic_clear_pending_interrupt(dev, scrq); 4136 } 4137 4138 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4139 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4140 if (rc) 4141 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4142 scrq->hw_irq, rc); 4143 return rc; 4144 } 4145 4146 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4147 struct ibmvnic_sub_crq_queue *scrq) 4148 { 4149 struct device *dev = &adapter->vdev->dev; 4150 struct ibmvnic_tx_pool *tx_pool; 4151 struct ibmvnic_tx_buff *txbuff; 4152 struct netdev_queue *txq; 4153 union sub_crq *next; 4154 int index; 4155 int i; 4156 4157 restart_loop: 4158 while (pending_scrq(adapter, scrq)) { 4159 unsigned int pool = scrq->pool_index; 4160 int num_entries = 0; 4161 int total_bytes = 0; 4162 int num_packets = 0; 4163 4164 next = ibmvnic_next_scrq(adapter, scrq); 4165 for (i = 0; i < next->tx_comp.num_comps; i++) { 4166 index = be32_to_cpu(next->tx_comp.correlators[i]); 4167 if (index & IBMVNIC_TSO_POOL_MASK) { 4168 tx_pool = &adapter->tso_pool[pool]; 4169 index &= ~IBMVNIC_TSO_POOL_MASK; 4170 } else { 4171 tx_pool = &adapter->tx_pool[pool]; 4172 } 4173 4174 txbuff = &tx_pool->tx_buff[index]; 4175 num_packets++; 4176 num_entries += txbuff->num_entries; 4177 if (txbuff->skb) { 4178 total_bytes += txbuff->skb->len; 4179 if (next->tx_comp.rcs[i]) { 4180 dev_err(dev, "tx error %x\n", 4181 next->tx_comp.rcs[i]); 4182 dev_kfree_skb_irq(txbuff->skb); 4183 } else { 4184 dev_consume_skb_irq(txbuff->skb); 4185 } 4186 txbuff->skb = NULL; 4187 } else { 4188 netdev_warn(adapter->netdev, 4189 "TX completion received with NULL socket buffer\n"); 4190 } 4191 tx_pool->free_map[tx_pool->producer_index] = index; 4192 tx_pool->producer_index = 4193 (tx_pool->producer_index + 1) % 4194 tx_pool->num_buffers; 4195 } 4196 /* remove tx_comp scrq*/ 4197 next->tx_comp.first = 0; 4198 4199 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4200 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4201 4202 if (atomic_sub_return(num_entries, &scrq->used) <= 4203 (adapter->req_tx_entries_per_subcrq / 2) && 4204 __netif_subqueue_stopped(adapter->netdev, 4205 scrq->pool_index)) { 4206 rcu_read_lock(); 4207 if (adapter->tx_queues_active) { 4208 netif_wake_subqueue(adapter->netdev, 4209 scrq->pool_index); 4210 netdev_dbg(adapter->netdev, 4211 "Started queue %d\n", 4212 scrq->pool_index); 4213 } 4214 rcu_read_unlock(); 4215 } 4216 } 4217 4218 enable_scrq_irq(adapter, scrq); 4219 4220 if (pending_scrq(adapter, scrq)) { 4221 disable_scrq_irq(adapter, scrq); 4222 goto restart_loop; 4223 } 4224 4225 return 0; 4226 } 4227 4228 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4229 { 4230 struct ibmvnic_sub_crq_queue *scrq = instance; 4231 struct ibmvnic_adapter *adapter = scrq->adapter; 4232 4233 disable_scrq_irq(adapter, scrq); 4234 ibmvnic_complete_tx(adapter, scrq); 4235 4236 return IRQ_HANDLED; 4237 } 4238 4239 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4240 { 4241 struct ibmvnic_sub_crq_queue *scrq = instance; 4242 struct ibmvnic_adapter *adapter = scrq->adapter; 4243 4244 /* When booting a kdump kernel we can hit pending interrupts 4245 * prior to completing driver initialization. 4246 */ 4247 if (unlikely(adapter->state != VNIC_OPEN)) 4248 return IRQ_NONE; 4249 4250 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4251 4252 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4253 disable_scrq_irq(adapter, scrq); 4254 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4255 } 4256 4257 return IRQ_HANDLED; 4258 } 4259 4260 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4261 { 4262 struct device *dev = &adapter->vdev->dev; 4263 struct ibmvnic_sub_crq_queue *scrq; 4264 int i = 0, j = 0; 4265 int rc = 0; 4266 4267 for (i = 0; i < adapter->req_tx_queues; i++) { 4268 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4269 i); 4270 scrq = adapter->tx_scrq[i]; 4271 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4272 4273 if (!scrq->irq) { 4274 rc = -EINVAL; 4275 dev_err(dev, "Error mapping irq\n"); 4276 goto req_tx_irq_failed; 4277 } 4278 4279 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4280 adapter->vdev->unit_address, i); 4281 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4282 0, scrq->name, scrq); 4283 4284 if (rc) { 4285 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4286 scrq->irq, rc); 4287 irq_dispose_mapping(scrq->irq); 4288 goto req_tx_irq_failed; 4289 } 4290 } 4291 4292 for (i = 0; i < adapter->req_rx_queues; i++) { 4293 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4294 i); 4295 scrq = adapter->rx_scrq[i]; 4296 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4297 if (!scrq->irq) { 4298 rc = -EINVAL; 4299 dev_err(dev, "Error mapping irq\n"); 4300 goto req_rx_irq_failed; 4301 } 4302 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4303 adapter->vdev->unit_address, i); 4304 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4305 0, scrq->name, scrq); 4306 if (rc) { 4307 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4308 scrq->irq, rc); 4309 irq_dispose_mapping(scrq->irq); 4310 goto req_rx_irq_failed; 4311 } 4312 } 4313 4314 cpus_read_lock(); 4315 ibmvnic_set_affinity(adapter); 4316 cpus_read_unlock(); 4317 4318 return rc; 4319 4320 req_rx_irq_failed: 4321 for (j = 0; j < i; j++) { 4322 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4323 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4324 } 4325 i = adapter->req_tx_queues; 4326 req_tx_irq_failed: 4327 for (j = 0; j < i; j++) { 4328 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4329 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4330 } 4331 release_sub_crqs(adapter, 1); 4332 return rc; 4333 } 4334 4335 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4336 { 4337 struct device *dev = &adapter->vdev->dev; 4338 struct ibmvnic_sub_crq_queue **allqueues; 4339 int registered_queues = 0; 4340 int total_queues; 4341 int more = 0; 4342 int i; 4343 4344 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4345 4346 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4347 if (!allqueues) 4348 return -ENOMEM; 4349 4350 for (i = 0; i < total_queues; i++) { 4351 allqueues[i] = init_sub_crq_queue(adapter); 4352 if (!allqueues[i]) { 4353 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4354 break; 4355 } 4356 registered_queues++; 4357 } 4358 4359 /* Make sure we were able to register the minimum number of queues */ 4360 if (registered_queues < 4361 adapter->min_tx_queues + adapter->min_rx_queues) { 4362 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4363 goto tx_failed; 4364 } 4365 4366 /* Distribute the failed allocated queues*/ 4367 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4368 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4369 switch (i % 3) { 4370 case 0: 4371 if (adapter->req_rx_queues > adapter->min_rx_queues) 4372 adapter->req_rx_queues--; 4373 else 4374 more++; 4375 break; 4376 case 1: 4377 if (adapter->req_tx_queues > adapter->min_tx_queues) 4378 adapter->req_tx_queues--; 4379 else 4380 more++; 4381 break; 4382 } 4383 } 4384 4385 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4386 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4387 if (!adapter->tx_scrq) 4388 goto tx_failed; 4389 4390 for (i = 0; i < adapter->req_tx_queues; i++) { 4391 adapter->tx_scrq[i] = allqueues[i]; 4392 adapter->tx_scrq[i]->pool_index = i; 4393 adapter->num_active_tx_scrqs++; 4394 } 4395 4396 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4397 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4398 if (!adapter->rx_scrq) 4399 goto rx_failed; 4400 4401 for (i = 0; i < adapter->req_rx_queues; i++) { 4402 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4403 adapter->rx_scrq[i]->scrq_num = i; 4404 adapter->num_active_rx_scrqs++; 4405 } 4406 4407 kfree(allqueues); 4408 return 0; 4409 4410 rx_failed: 4411 kfree(adapter->tx_scrq); 4412 adapter->tx_scrq = NULL; 4413 tx_failed: 4414 for (i = 0; i < registered_queues; i++) 4415 release_sub_crq_queue(adapter, allqueues[i], 1); 4416 kfree(allqueues); 4417 return -ENOMEM; 4418 } 4419 4420 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4421 { 4422 struct device *dev = &adapter->vdev->dev; 4423 union ibmvnic_crq crq; 4424 int max_entries; 4425 int cap_reqs; 4426 4427 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4428 * the PROMISC flag). Initialize this count upfront. When the tasklet 4429 * receives a response to all of these, it will send the next protocol 4430 * message (QUERY_IP_OFFLOAD). 4431 */ 4432 if (!(adapter->netdev->flags & IFF_PROMISC) || 4433 adapter->promisc_supported) 4434 cap_reqs = 7; 4435 else 4436 cap_reqs = 6; 4437 4438 if (!retry) { 4439 /* Sub-CRQ entries are 32 byte long */ 4440 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4441 4442 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4443 4444 if (adapter->min_tx_entries_per_subcrq > entries_page || 4445 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4446 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4447 return; 4448 } 4449 4450 if (adapter->desired.mtu) 4451 adapter->req_mtu = adapter->desired.mtu; 4452 else 4453 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4454 4455 if (!adapter->desired.tx_entries) 4456 adapter->desired.tx_entries = 4457 adapter->max_tx_entries_per_subcrq; 4458 if (!adapter->desired.rx_entries) 4459 adapter->desired.rx_entries = 4460 adapter->max_rx_add_entries_per_subcrq; 4461 4462 max_entries = IBMVNIC_LTB_SET_SIZE / 4463 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4464 4465 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4466 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4467 adapter->desired.tx_entries = max_entries; 4468 } 4469 4470 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4471 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4472 adapter->desired.rx_entries = max_entries; 4473 } 4474 4475 if (adapter->desired.tx_entries) 4476 adapter->req_tx_entries_per_subcrq = 4477 adapter->desired.tx_entries; 4478 else 4479 adapter->req_tx_entries_per_subcrq = 4480 adapter->max_tx_entries_per_subcrq; 4481 4482 if (adapter->desired.rx_entries) 4483 adapter->req_rx_add_entries_per_subcrq = 4484 adapter->desired.rx_entries; 4485 else 4486 adapter->req_rx_add_entries_per_subcrq = 4487 adapter->max_rx_add_entries_per_subcrq; 4488 4489 if (adapter->desired.tx_queues) 4490 adapter->req_tx_queues = 4491 adapter->desired.tx_queues; 4492 else 4493 adapter->req_tx_queues = 4494 adapter->opt_tx_comp_sub_queues; 4495 4496 if (adapter->desired.rx_queues) 4497 adapter->req_rx_queues = 4498 adapter->desired.rx_queues; 4499 else 4500 adapter->req_rx_queues = 4501 adapter->opt_rx_comp_queues; 4502 4503 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4504 } else { 4505 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4506 } 4507 memset(&crq, 0, sizeof(crq)); 4508 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4509 crq.request_capability.cmd = REQUEST_CAPABILITY; 4510 4511 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4512 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4513 cap_reqs--; 4514 ibmvnic_send_crq(adapter, &crq); 4515 4516 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4517 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4518 cap_reqs--; 4519 ibmvnic_send_crq(adapter, &crq); 4520 4521 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4522 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4523 cap_reqs--; 4524 ibmvnic_send_crq(adapter, &crq); 4525 4526 crq.request_capability.capability = 4527 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4528 crq.request_capability.number = 4529 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4530 cap_reqs--; 4531 ibmvnic_send_crq(adapter, &crq); 4532 4533 crq.request_capability.capability = 4534 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4535 crq.request_capability.number = 4536 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4537 cap_reqs--; 4538 ibmvnic_send_crq(adapter, &crq); 4539 4540 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4541 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4542 cap_reqs--; 4543 ibmvnic_send_crq(adapter, &crq); 4544 4545 if (adapter->netdev->flags & IFF_PROMISC) { 4546 if (adapter->promisc_supported) { 4547 crq.request_capability.capability = 4548 cpu_to_be16(PROMISC_REQUESTED); 4549 crq.request_capability.number = cpu_to_be64(1); 4550 cap_reqs--; 4551 ibmvnic_send_crq(adapter, &crq); 4552 } 4553 } else { 4554 crq.request_capability.capability = 4555 cpu_to_be16(PROMISC_REQUESTED); 4556 crq.request_capability.number = cpu_to_be64(0); 4557 cap_reqs--; 4558 ibmvnic_send_crq(adapter, &crq); 4559 } 4560 4561 /* Keep at end to catch any discrepancy between expected and actual 4562 * CRQs sent. 4563 */ 4564 WARN_ON(cap_reqs != 0); 4565 } 4566 4567 static int pending_scrq(struct ibmvnic_adapter *adapter, 4568 struct ibmvnic_sub_crq_queue *scrq) 4569 { 4570 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4571 int rc; 4572 4573 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4574 4575 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4576 * contents of the SCRQ descriptor 4577 */ 4578 dma_rmb(); 4579 4580 return rc; 4581 } 4582 4583 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4584 struct ibmvnic_sub_crq_queue *scrq) 4585 { 4586 union sub_crq *entry; 4587 unsigned long flags; 4588 4589 spin_lock_irqsave(&scrq->lock, flags); 4590 entry = &scrq->msgs[scrq->cur]; 4591 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4592 if (++scrq->cur == scrq->size) 4593 scrq->cur = 0; 4594 } else { 4595 entry = NULL; 4596 } 4597 spin_unlock_irqrestore(&scrq->lock, flags); 4598 4599 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4600 * contents of the SCRQ descriptor 4601 */ 4602 dma_rmb(); 4603 4604 return entry; 4605 } 4606 4607 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4608 { 4609 struct ibmvnic_crq_queue *queue = &adapter->crq; 4610 union ibmvnic_crq *crq; 4611 4612 crq = &queue->msgs[queue->cur]; 4613 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4614 if (++queue->cur == queue->size) 4615 queue->cur = 0; 4616 } else { 4617 crq = NULL; 4618 } 4619 4620 return crq; 4621 } 4622 4623 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4624 { 4625 switch (rc) { 4626 case H_PARAMETER: 4627 dev_warn_ratelimited(dev, 4628 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4629 func, rc); 4630 break; 4631 case H_CLOSED: 4632 dev_warn_ratelimited(dev, 4633 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4634 func, rc); 4635 break; 4636 default: 4637 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4638 break; 4639 } 4640 } 4641 4642 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4643 u64 remote_handle, u64 ioba, u64 num_entries) 4644 { 4645 unsigned int ua = adapter->vdev->unit_address; 4646 struct device *dev = &adapter->vdev->dev; 4647 int rc; 4648 4649 /* Make sure the hypervisor sees the complete request */ 4650 dma_wmb(); 4651 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4652 cpu_to_be64(remote_handle), 4653 ioba, num_entries); 4654 4655 if (rc) 4656 print_subcrq_error(dev, rc, __func__); 4657 4658 return rc; 4659 } 4660 4661 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4662 union ibmvnic_crq *crq) 4663 { 4664 unsigned int ua = adapter->vdev->unit_address; 4665 struct device *dev = &adapter->vdev->dev; 4666 u64 *u64_crq = (u64 *)crq; 4667 int rc; 4668 4669 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4670 (unsigned long)cpu_to_be64(u64_crq[0]), 4671 (unsigned long)cpu_to_be64(u64_crq[1])); 4672 4673 if (!adapter->crq.active && 4674 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4675 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4676 return -EINVAL; 4677 } 4678 4679 /* Make sure the hypervisor sees the complete request */ 4680 dma_wmb(); 4681 4682 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4683 cpu_to_be64(u64_crq[0]), 4684 cpu_to_be64(u64_crq[1])); 4685 4686 if (rc) { 4687 if (rc == H_CLOSED) { 4688 dev_warn(dev, "CRQ Queue closed\n"); 4689 /* do not reset, report the fail, wait for passive init from server */ 4690 } 4691 4692 dev_warn(dev, "Send error (rc=%d)\n", rc); 4693 } 4694 4695 return rc; 4696 } 4697 4698 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4699 { 4700 struct device *dev = &adapter->vdev->dev; 4701 union ibmvnic_crq crq; 4702 int retries = 100; 4703 int rc; 4704 4705 memset(&crq, 0, sizeof(crq)); 4706 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4707 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4708 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4709 4710 do { 4711 rc = ibmvnic_send_crq(adapter, &crq); 4712 if (rc != H_CLOSED) 4713 break; 4714 retries--; 4715 msleep(50); 4716 4717 } while (retries > 0); 4718 4719 if (rc) { 4720 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4721 return rc; 4722 } 4723 4724 return 0; 4725 } 4726 4727 struct vnic_login_client_data { 4728 u8 type; 4729 __be16 len; 4730 char name[]; 4731 } __packed; 4732 4733 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4734 { 4735 int len; 4736 4737 /* Calculate the amount of buffer space needed for the 4738 * vnic client data in the login buffer. There are four entries, 4739 * OS name, LPAR name, device name, and a null last entry. 4740 */ 4741 len = 4 * sizeof(struct vnic_login_client_data); 4742 len += 6; /* "Linux" plus NULL */ 4743 len += strlen(utsname()->nodename) + 1; 4744 len += strlen(adapter->netdev->name) + 1; 4745 4746 return len; 4747 } 4748 4749 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4750 struct vnic_login_client_data *vlcd) 4751 { 4752 const char *os_name = "Linux"; 4753 int len; 4754 4755 /* Type 1 - LPAR OS */ 4756 vlcd->type = 1; 4757 len = strlen(os_name) + 1; 4758 vlcd->len = cpu_to_be16(len); 4759 strscpy(vlcd->name, os_name, len); 4760 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4761 4762 /* Type 2 - LPAR name */ 4763 vlcd->type = 2; 4764 len = strlen(utsname()->nodename) + 1; 4765 vlcd->len = cpu_to_be16(len); 4766 strscpy(vlcd->name, utsname()->nodename, len); 4767 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4768 4769 /* Type 3 - device name */ 4770 vlcd->type = 3; 4771 len = strlen(adapter->netdev->name) + 1; 4772 vlcd->len = cpu_to_be16(len); 4773 strscpy(vlcd->name, adapter->netdev->name, len); 4774 } 4775 4776 static int send_login(struct ibmvnic_adapter *adapter) 4777 { 4778 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4779 struct ibmvnic_login_buffer *login_buffer; 4780 struct device *dev = &adapter->vdev->dev; 4781 struct vnic_login_client_data *vlcd; 4782 dma_addr_t rsp_buffer_token; 4783 dma_addr_t buffer_token; 4784 size_t rsp_buffer_size; 4785 union ibmvnic_crq crq; 4786 int client_data_len; 4787 size_t buffer_size; 4788 __be64 *tx_list_p; 4789 __be64 *rx_list_p; 4790 int rc; 4791 int i; 4792 4793 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4794 netdev_err(adapter->netdev, 4795 "RX or TX queues are not allocated, device login failed\n"); 4796 return -ENOMEM; 4797 } 4798 4799 release_login_buffer(adapter); 4800 release_login_rsp_buffer(adapter); 4801 4802 client_data_len = vnic_client_data_len(adapter); 4803 4804 buffer_size = 4805 sizeof(struct ibmvnic_login_buffer) + 4806 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4807 client_data_len; 4808 4809 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4810 if (!login_buffer) 4811 goto buf_alloc_failed; 4812 4813 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4814 DMA_TO_DEVICE); 4815 if (dma_mapping_error(dev, buffer_token)) { 4816 dev_err(dev, "Couldn't map login buffer\n"); 4817 goto buf_map_failed; 4818 } 4819 4820 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4821 sizeof(u64) * adapter->req_tx_queues + 4822 sizeof(u64) * adapter->req_rx_queues + 4823 sizeof(u64) * adapter->req_rx_queues + 4824 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4825 4826 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4827 if (!login_rsp_buffer) 4828 goto buf_rsp_alloc_failed; 4829 4830 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4831 rsp_buffer_size, DMA_FROM_DEVICE); 4832 if (dma_mapping_error(dev, rsp_buffer_token)) { 4833 dev_err(dev, "Couldn't map login rsp buffer\n"); 4834 goto buf_rsp_map_failed; 4835 } 4836 4837 adapter->login_buf = login_buffer; 4838 adapter->login_buf_token = buffer_token; 4839 adapter->login_buf_sz = buffer_size; 4840 adapter->login_rsp_buf = login_rsp_buffer; 4841 adapter->login_rsp_buf_token = rsp_buffer_token; 4842 adapter->login_rsp_buf_sz = rsp_buffer_size; 4843 4844 login_buffer->len = cpu_to_be32(buffer_size); 4845 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4846 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4847 login_buffer->off_txcomp_subcrqs = 4848 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4849 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4850 login_buffer->off_rxcomp_subcrqs = 4851 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4852 sizeof(u64) * adapter->req_tx_queues); 4853 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4854 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4855 4856 tx_list_p = (__be64 *)((char *)login_buffer + 4857 sizeof(struct ibmvnic_login_buffer)); 4858 rx_list_p = (__be64 *)((char *)login_buffer + 4859 sizeof(struct ibmvnic_login_buffer) + 4860 sizeof(u64) * adapter->req_tx_queues); 4861 4862 for (i = 0; i < adapter->req_tx_queues; i++) { 4863 if (adapter->tx_scrq[i]) { 4864 tx_list_p[i] = 4865 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4866 } 4867 } 4868 4869 for (i = 0; i < adapter->req_rx_queues; i++) { 4870 if (adapter->rx_scrq[i]) { 4871 rx_list_p[i] = 4872 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4873 } 4874 } 4875 4876 /* Insert vNIC login client data */ 4877 vlcd = (struct vnic_login_client_data *) 4878 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4879 login_buffer->client_data_offset = 4880 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4881 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4882 4883 vnic_add_client_data(adapter, vlcd); 4884 4885 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4886 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4887 netdev_dbg(adapter->netdev, "%016lx\n", 4888 ((unsigned long *)(adapter->login_buf))[i]); 4889 } 4890 4891 memset(&crq, 0, sizeof(crq)); 4892 crq.login.first = IBMVNIC_CRQ_CMD; 4893 crq.login.cmd = LOGIN; 4894 crq.login.ioba = cpu_to_be32(buffer_token); 4895 crq.login.len = cpu_to_be32(buffer_size); 4896 4897 adapter->login_pending = true; 4898 rc = ibmvnic_send_crq(adapter, &crq); 4899 if (rc) { 4900 adapter->login_pending = false; 4901 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4902 goto buf_send_failed; 4903 } 4904 4905 return 0; 4906 4907 buf_send_failed: 4908 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4909 DMA_FROM_DEVICE); 4910 buf_rsp_map_failed: 4911 kfree(login_rsp_buffer); 4912 adapter->login_rsp_buf = NULL; 4913 buf_rsp_alloc_failed: 4914 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4915 buf_map_failed: 4916 kfree(login_buffer); 4917 adapter->login_buf = NULL; 4918 buf_alloc_failed: 4919 return -ENOMEM; 4920 } 4921 4922 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4923 u32 len, u8 map_id) 4924 { 4925 union ibmvnic_crq crq; 4926 4927 memset(&crq, 0, sizeof(crq)); 4928 crq.request_map.first = IBMVNIC_CRQ_CMD; 4929 crq.request_map.cmd = REQUEST_MAP; 4930 crq.request_map.map_id = map_id; 4931 crq.request_map.ioba = cpu_to_be32(addr); 4932 crq.request_map.len = cpu_to_be32(len); 4933 return ibmvnic_send_crq(adapter, &crq); 4934 } 4935 4936 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4937 { 4938 union ibmvnic_crq crq; 4939 4940 memset(&crq, 0, sizeof(crq)); 4941 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4942 crq.request_unmap.cmd = REQUEST_UNMAP; 4943 crq.request_unmap.map_id = map_id; 4944 return ibmvnic_send_crq(adapter, &crq); 4945 } 4946 4947 static void send_query_map(struct ibmvnic_adapter *adapter) 4948 { 4949 union ibmvnic_crq crq; 4950 4951 memset(&crq, 0, sizeof(crq)); 4952 crq.query_map.first = IBMVNIC_CRQ_CMD; 4953 crq.query_map.cmd = QUERY_MAP; 4954 ibmvnic_send_crq(adapter, &crq); 4955 } 4956 4957 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4958 static void send_query_cap(struct ibmvnic_adapter *adapter) 4959 { 4960 union ibmvnic_crq crq; 4961 int cap_reqs; 4962 4963 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4964 * upfront. When the tasklet receives a response to all of these, it 4965 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4966 */ 4967 cap_reqs = 25; 4968 4969 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4970 4971 memset(&crq, 0, sizeof(crq)); 4972 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4973 crq.query_capability.cmd = QUERY_CAPABILITY; 4974 4975 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4976 ibmvnic_send_crq(adapter, &crq); 4977 cap_reqs--; 4978 4979 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4980 ibmvnic_send_crq(adapter, &crq); 4981 cap_reqs--; 4982 4983 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4984 ibmvnic_send_crq(adapter, &crq); 4985 cap_reqs--; 4986 4987 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4988 ibmvnic_send_crq(adapter, &crq); 4989 cap_reqs--; 4990 4991 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4992 ibmvnic_send_crq(adapter, &crq); 4993 cap_reqs--; 4994 4995 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4996 ibmvnic_send_crq(adapter, &crq); 4997 cap_reqs--; 4998 4999 crq.query_capability.capability = 5000 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5001 ibmvnic_send_crq(adapter, &crq); 5002 cap_reqs--; 5003 5004 crq.query_capability.capability = 5005 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5006 ibmvnic_send_crq(adapter, &crq); 5007 cap_reqs--; 5008 5009 crq.query_capability.capability = 5010 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5011 ibmvnic_send_crq(adapter, &crq); 5012 cap_reqs--; 5013 5014 crq.query_capability.capability = 5015 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5016 ibmvnic_send_crq(adapter, &crq); 5017 cap_reqs--; 5018 5019 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5020 ibmvnic_send_crq(adapter, &crq); 5021 cap_reqs--; 5022 5023 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5024 ibmvnic_send_crq(adapter, &crq); 5025 cap_reqs--; 5026 5027 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5028 ibmvnic_send_crq(adapter, &crq); 5029 cap_reqs--; 5030 5031 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5032 ibmvnic_send_crq(adapter, &crq); 5033 cap_reqs--; 5034 5035 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5036 ibmvnic_send_crq(adapter, &crq); 5037 cap_reqs--; 5038 5039 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5040 ibmvnic_send_crq(adapter, &crq); 5041 cap_reqs--; 5042 5043 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5044 ibmvnic_send_crq(adapter, &crq); 5045 cap_reqs--; 5046 5047 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5048 ibmvnic_send_crq(adapter, &crq); 5049 cap_reqs--; 5050 5051 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5052 ibmvnic_send_crq(adapter, &crq); 5053 cap_reqs--; 5054 5055 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5056 ibmvnic_send_crq(adapter, &crq); 5057 cap_reqs--; 5058 5059 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5060 ibmvnic_send_crq(adapter, &crq); 5061 cap_reqs--; 5062 5063 crq.query_capability.capability = 5064 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5065 ibmvnic_send_crq(adapter, &crq); 5066 cap_reqs--; 5067 5068 crq.query_capability.capability = 5069 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5070 ibmvnic_send_crq(adapter, &crq); 5071 cap_reqs--; 5072 5073 crq.query_capability.capability = 5074 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5075 ibmvnic_send_crq(adapter, &crq); 5076 cap_reqs--; 5077 5078 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5079 5080 ibmvnic_send_crq(adapter, &crq); 5081 cap_reqs--; 5082 5083 /* Keep at end to catch any discrepancy between expected and actual 5084 * CRQs sent. 5085 */ 5086 WARN_ON(cap_reqs != 0); 5087 } 5088 5089 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5090 { 5091 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5092 struct device *dev = &adapter->vdev->dev; 5093 union ibmvnic_crq crq; 5094 5095 adapter->ip_offload_tok = 5096 dma_map_single(dev, 5097 &adapter->ip_offload_buf, 5098 buf_sz, 5099 DMA_FROM_DEVICE); 5100 5101 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5102 if (!firmware_has_feature(FW_FEATURE_CMO)) 5103 dev_err(dev, "Couldn't map offload buffer\n"); 5104 return; 5105 } 5106 5107 memset(&crq, 0, sizeof(crq)); 5108 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5109 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5110 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5111 crq.query_ip_offload.ioba = 5112 cpu_to_be32(adapter->ip_offload_tok); 5113 5114 ibmvnic_send_crq(adapter, &crq); 5115 } 5116 5117 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5118 { 5119 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5120 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5121 struct device *dev = &adapter->vdev->dev; 5122 netdev_features_t old_hw_features = 0; 5123 union ibmvnic_crq crq; 5124 5125 adapter->ip_offload_ctrl_tok = 5126 dma_map_single(dev, 5127 ctrl_buf, 5128 sizeof(adapter->ip_offload_ctrl), 5129 DMA_TO_DEVICE); 5130 5131 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5132 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5133 return; 5134 } 5135 5136 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5137 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5138 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5139 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5140 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5141 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5142 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5143 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5144 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5145 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5146 5147 /* large_rx disabled for now, additional features needed */ 5148 ctrl_buf->large_rx_ipv4 = 0; 5149 ctrl_buf->large_rx_ipv6 = 0; 5150 5151 if (adapter->state != VNIC_PROBING) { 5152 old_hw_features = adapter->netdev->hw_features; 5153 adapter->netdev->hw_features = 0; 5154 } 5155 5156 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5157 5158 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5159 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5160 5161 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5162 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5163 5164 if ((adapter->netdev->features & 5165 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5166 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5167 5168 if (buf->large_tx_ipv4) 5169 adapter->netdev->hw_features |= NETIF_F_TSO; 5170 if (buf->large_tx_ipv6) 5171 adapter->netdev->hw_features |= NETIF_F_TSO6; 5172 5173 if (adapter->state == VNIC_PROBING) { 5174 adapter->netdev->features |= adapter->netdev->hw_features; 5175 } else if (old_hw_features != adapter->netdev->hw_features) { 5176 netdev_features_t tmp = 0; 5177 5178 /* disable features no longer supported */ 5179 adapter->netdev->features &= adapter->netdev->hw_features; 5180 /* turn on features now supported if previously enabled */ 5181 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5182 adapter->netdev->hw_features; 5183 adapter->netdev->features |= 5184 tmp & adapter->netdev->wanted_features; 5185 } 5186 5187 memset(&crq, 0, sizeof(crq)); 5188 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5189 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5190 crq.control_ip_offload.len = 5191 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5192 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5193 ibmvnic_send_crq(adapter, &crq); 5194 } 5195 5196 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5197 struct ibmvnic_adapter *adapter) 5198 { 5199 struct device *dev = &adapter->vdev->dev; 5200 5201 if (crq->get_vpd_size_rsp.rc.code) { 5202 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5203 crq->get_vpd_size_rsp.rc.code); 5204 complete(&adapter->fw_done); 5205 return; 5206 } 5207 5208 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5209 complete(&adapter->fw_done); 5210 } 5211 5212 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5213 struct ibmvnic_adapter *adapter) 5214 { 5215 struct device *dev = &adapter->vdev->dev; 5216 unsigned char *substr = NULL; 5217 u8 fw_level_len = 0; 5218 5219 memset(adapter->fw_version, 0, 32); 5220 5221 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5222 DMA_FROM_DEVICE); 5223 5224 if (crq->get_vpd_rsp.rc.code) { 5225 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5226 crq->get_vpd_rsp.rc.code); 5227 goto complete; 5228 } 5229 5230 /* get the position of the firmware version info 5231 * located after the ASCII 'RM' substring in the buffer 5232 */ 5233 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5234 if (!substr) { 5235 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5236 goto complete; 5237 } 5238 5239 /* get length of firmware level ASCII substring */ 5240 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5241 fw_level_len = *(substr + 2); 5242 } else { 5243 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5244 goto complete; 5245 } 5246 5247 /* copy firmware version string from vpd into adapter */ 5248 if ((substr + 3 + fw_level_len) < 5249 (adapter->vpd->buff + adapter->vpd->len)) { 5250 strscpy(adapter->fw_version, substr + 3, 5251 sizeof(adapter->fw_version)); 5252 } else { 5253 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5254 } 5255 5256 complete: 5257 if (adapter->fw_version[0] == '\0') 5258 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5259 complete(&adapter->fw_done); 5260 } 5261 5262 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5263 { 5264 struct device *dev = &adapter->vdev->dev; 5265 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5266 int i; 5267 5268 dma_unmap_single(dev, adapter->ip_offload_tok, 5269 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5270 5271 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5272 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5273 netdev_dbg(adapter->netdev, "%016lx\n", 5274 ((unsigned long *)(buf))[i]); 5275 5276 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5277 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5278 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5279 buf->tcp_ipv4_chksum); 5280 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5281 buf->tcp_ipv6_chksum); 5282 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5283 buf->udp_ipv4_chksum); 5284 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5285 buf->udp_ipv6_chksum); 5286 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5287 buf->large_tx_ipv4); 5288 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5289 buf->large_tx_ipv6); 5290 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5291 buf->large_rx_ipv4); 5292 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5293 buf->large_rx_ipv6); 5294 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5295 buf->max_ipv4_header_size); 5296 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5297 buf->max_ipv6_header_size); 5298 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5299 buf->max_tcp_header_size); 5300 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5301 buf->max_udp_header_size); 5302 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5303 buf->max_large_tx_size); 5304 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5305 buf->max_large_rx_size); 5306 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5307 buf->ipv6_extension_header); 5308 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5309 buf->tcp_pseudosum_req); 5310 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5311 buf->num_ipv6_ext_headers); 5312 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5313 buf->off_ipv6_ext_headers); 5314 5315 send_control_ip_offload(adapter); 5316 } 5317 5318 static const char *ibmvnic_fw_err_cause(u16 cause) 5319 { 5320 switch (cause) { 5321 case ADAPTER_PROBLEM: 5322 return "adapter problem"; 5323 case BUS_PROBLEM: 5324 return "bus problem"; 5325 case FW_PROBLEM: 5326 return "firmware problem"; 5327 case DD_PROBLEM: 5328 return "device driver problem"; 5329 case EEH_RECOVERY: 5330 return "EEH recovery"; 5331 case FW_UPDATED: 5332 return "firmware updated"; 5333 case LOW_MEMORY: 5334 return "low Memory"; 5335 default: 5336 return "unknown"; 5337 } 5338 } 5339 5340 static void handle_error_indication(union ibmvnic_crq *crq, 5341 struct ibmvnic_adapter *adapter) 5342 { 5343 struct device *dev = &adapter->vdev->dev; 5344 u16 cause; 5345 5346 cause = be16_to_cpu(crq->error_indication.error_cause); 5347 5348 dev_warn_ratelimited(dev, 5349 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5350 crq->error_indication.flags 5351 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5352 ibmvnic_fw_err_cause(cause)); 5353 5354 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5355 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5356 else 5357 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5358 } 5359 5360 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5361 struct ibmvnic_adapter *adapter) 5362 { 5363 struct net_device *netdev = adapter->netdev; 5364 struct device *dev = &adapter->vdev->dev; 5365 long rc; 5366 5367 rc = crq->change_mac_addr_rsp.rc.code; 5368 if (rc) { 5369 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5370 goto out; 5371 } 5372 /* crq->change_mac_addr.mac_addr is the requested one 5373 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5374 */ 5375 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5376 ether_addr_copy(adapter->mac_addr, 5377 &crq->change_mac_addr_rsp.mac_addr[0]); 5378 out: 5379 complete(&adapter->fw_done); 5380 return rc; 5381 } 5382 5383 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5384 struct ibmvnic_adapter *adapter) 5385 { 5386 struct device *dev = &adapter->vdev->dev; 5387 u64 *req_value; 5388 char *name; 5389 5390 atomic_dec(&adapter->running_cap_crqs); 5391 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5392 atomic_read(&adapter->running_cap_crqs)); 5393 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5394 case REQ_TX_QUEUES: 5395 req_value = &adapter->req_tx_queues; 5396 name = "tx"; 5397 break; 5398 case REQ_RX_QUEUES: 5399 req_value = &adapter->req_rx_queues; 5400 name = "rx"; 5401 break; 5402 case REQ_RX_ADD_QUEUES: 5403 req_value = &adapter->req_rx_add_queues; 5404 name = "rx_add"; 5405 break; 5406 case REQ_TX_ENTRIES_PER_SUBCRQ: 5407 req_value = &adapter->req_tx_entries_per_subcrq; 5408 name = "tx_entries_per_subcrq"; 5409 break; 5410 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5411 req_value = &adapter->req_rx_add_entries_per_subcrq; 5412 name = "rx_add_entries_per_subcrq"; 5413 break; 5414 case REQ_MTU: 5415 req_value = &adapter->req_mtu; 5416 name = "mtu"; 5417 break; 5418 case PROMISC_REQUESTED: 5419 req_value = &adapter->promisc; 5420 name = "promisc"; 5421 break; 5422 default: 5423 dev_err(dev, "Got invalid cap request rsp %d\n", 5424 crq->request_capability.capability); 5425 return; 5426 } 5427 5428 switch (crq->request_capability_rsp.rc.code) { 5429 case SUCCESS: 5430 break; 5431 case PARTIALSUCCESS: 5432 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5433 *req_value, 5434 (long)be64_to_cpu(crq->request_capability_rsp.number), 5435 name); 5436 5437 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5438 REQ_MTU) { 5439 pr_err("mtu of %llu is not supported. Reverting.\n", 5440 *req_value); 5441 *req_value = adapter->fallback.mtu; 5442 } else { 5443 *req_value = 5444 be64_to_cpu(crq->request_capability_rsp.number); 5445 } 5446 5447 send_request_cap(adapter, 1); 5448 return; 5449 default: 5450 dev_err(dev, "Error %d in request cap rsp\n", 5451 crq->request_capability_rsp.rc.code); 5452 return; 5453 } 5454 5455 /* Done receiving requested capabilities, query IP offload support */ 5456 if (atomic_read(&adapter->running_cap_crqs) == 0) 5457 send_query_ip_offload(adapter); 5458 } 5459 5460 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5461 struct ibmvnic_adapter *adapter) 5462 { 5463 struct device *dev = &adapter->vdev->dev; 5464 struct net_device *netdev = adapter->netdev; 5465 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5466 struct ibmvnic_login_buffer *login = adapter->login_buf; 5467 u64 *tx_handle_array; 5468 u64 *rx_handle_array; 5469 int num_tx_pools; 5470 int num_rx_pools; 5471 u64 *size_array; 5472 u32 rsp_len; 5473 int i; 5474 5475 /* CHECK: Test/set of login_pending does not need to be atomic 5476 * because only ibmvnic_tasklet tests/clears this. 5477 */ 5478 if (!adapter->login_pending) { 5479 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5480 return 0; 5481 } 5482 adapter->login_pending = false; 5483 5484 /* If the number of queues requested can't be allocated by the 5485 * server, the login response will return with code 1. We will need 5486 * to resend the login buffer with fewer queues requested. 5487 */ 5488 if (login_rsp_crq->generic.rc.code) { 5489 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5490 complete(&adapter->init_done); 5491 return 0; 5492 } 5493 5494 if (adapter->failover_pending) { 5495 adapter->init_done_rc = -EAGAIN; 5496 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5497 complete(&adapter->init_done); 5498 /* login response buffer will be released on reset */ 5499 return 0; 5500 } 5501 5502 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5503 5504 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5505 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5506 netdev_dbg(adapter->netdev, "%016lx\n", 5507 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5508 } 5509 5510 /* Sanity checks */ 5511 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5512 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5513 adapter->req_rx_add_queues != 5514 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5515 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5516 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5517 return -EIO; 5518 } 5519 5520 rsp_len = be32_to_cpu(login_rsp->len); 5521 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5522 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5523 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5524 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5525 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5526 /* This can happen if a login request times out and there are 5527 * 2 outstanding login requests sent, the LOGIN_RSP crq 5528 * could have been for the older login request. So we are 5529 * parsing the newer response buffer which may be incomplete 5530 */ 5531 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5532 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5533 return -EIO; 5534 } 5535 5536 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5537 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5538 /* variable buffer sizes are not supported, so just read the 5539 * first entry. 5540 */ 5541 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5542 5543 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5544 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5545 5546 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5547 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5548 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5549 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5550 5551 for (i = 0; i < num_tx_pools; i++) 5552 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5553 5554 for (i = 0; i < num_rx_pools; i++) 5555 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5556 5557 adapter->num_active_tx_scrqs = num_tx_pools; 5558 adapter->num_active_rx_scrqs = num_rx_pools; 5559 release_login_rsp_buffer(adapter); 5560 release_login_buffer(adapter); 5561 complete(&adapter->init_done); 5562 5563 return 0; 5564 } 5565 5566 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5567 struct ibmvnic_adapter *adapter) 5568 { 5569 struct device *dev = &adapter->vdev->dev; 5570 long rc; 5571 5572 rc = crq->request_unmap_rsp.rc.code; 5573 if (rc) 5574 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5575 } 5576 5577 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5578 struct ibmvnic_adapter *adapter) 5579 { 5580 struct net_device *netdev = adapter->netdev; 5581 struct device *dev = &adapter->vdev->dev; 5582 long rc; 5583 5584 rc = crq->query_map_rsp.rc.code; 5585 if (rc) { 5586 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5587 return; 5588 } 5589 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5590 crq->query_map_rsp.page_size, 5591 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5592 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5593 } 5594 5595 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5596 struct ibmvnic_adapter *adapter) 5597 { 5598 struct net_device *netdev = adapter->netdev; 5599 struct device *dev = &adapter->vdev->dev; 5600 long rc; 5601 5602 atomic_dec(&adapter->running_cap_crqs); 5603 netdev_dbg(netdev, "Outstanding queries: %d\n", 5604 atomic_read(&adapter->running_cap_crqs)); 5605 rc = crq->query_capability.rc.code; 5606 if (rc) { 5607 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5608 goto out; 5609 } 5610 5611 switch (be16_to_cpu(crq->query_capability.capability)) { 5612 case MIN_TX_QUEUES: 5613 adapter->min_tx_queues = 5614 be64_to_cpu(crq->query_capability.number); 5615 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5616 adapter->min_tx_queues); 5617 break; 5618 case MIN_RX_QUEUES: 5619 adapter->min_rx_queues = 5620 be64_to_cpu(crq->query_capability.number); 5621 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5622 adapter->min_rx_queues); 5623 break; 5624 case MIN_RX_ADD_QUEUES: 5625 adapter->min_rx_add_queues = 5626 be64_to_cpu(crq->query_capability.number); 5627 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5628 adapter->min_rx_add_queues); 5629 break; 5630 case MAX_TX_QUEUES: 5631 adapter->max_tx_queues = 5632 be64_to_cpu(crq->query_capability.number); 5633 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5634 adapter->max_tx_queues); 5635 break; 5636 case MAX_RX_QUEUES: 5637 adapter->max_rx_queues = 5638 be64_to_cpu(crq->query_capability.number); 5639 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5640 adapter->max_rx_queues); 5641 break; 5642 case MAX_RX_ADD_QUEUES: 5643 adapter->max_rx_add_queues = 5644 be64_to_cpu(crq->query_capability.number); 5645 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5646 adapter->max_rx_add_queues); 5647 break; 5648 case MIN_TX_ENTRIES_PER_SUBCRQ: 5649 adapter->min_tx_entries_per_subcrq = 5650 be64_to_cpu(crq->query_capability.number); 5651 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5652 adapter->min_tx_entries_per_subcrq); 5653 break; 5654 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5655 adapter->min_rx_add_entries_per_subcrq = 5656 be64_to_cpu(crq->query_capability.number); 5657 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5658 adapter->min_rx_add_entries_per_subcrq); 5659 break; 5660 case MAX_TX_ENTRIES_PER_SUBCRQ: 5661 adapter->max_tx_entries_per_subcrq = 5662 be64_to_cpu(crq->query_capability.number); 5663 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5664 adapter->max_tx_entries_per_subcrq); 5665 break; 5666 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5667 adapter->max_rx_add_entries_per_subcrq = 5668 be64_to_cpu(crq->query_capability.number); 5669 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5670 adapter->max_rx_add_entries_per_subcrq); 5671 break; 5672 case TCP_IP_OFFLOAD: 5673 adapter->tcp_ip_offload = 5674 be64_to_cpu(crq->query_capability.number); 5675 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5676 adapter->tcp_ip_offload); 5677 break; 5678 case PROMISC_SUPPORTED: 5679 adapter->promisc_supported = 5680 be64_to_cpu(crq->query_capability.number); 5681 netdev_dbg(netdev, "promisc_supported = %lld\n", 5682 adapter->promisc_supported); 5683 break; 5684 case MIN_MTU: 5685 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5686 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5687 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5688 break; 5689 case MAX_MTU: 5690 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5691 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5692 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5693 break; 5694 case MAX_MULTICAST_FILTERS: 5695 adapter->max_multicast_filters = 5696 be64_to_cpu(crq->query_capability.number); 5697 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5698 adapter->max_multicast_filters); 5699 break; 5700 case VLAN_HEADER_INSERTION: 5701 adapter->vlan_header_insertion = 5702 be64_to_cpu(crq->query_capability.number); 5703 if (adapter->vlan_header_insertion) 5704 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5705 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5706 adapter->vlan_header_insertion); 5707 break; 5708 case RX_VLAN_HEADER_INSERTION: 5709 adapter->rx_vlan_header_insertion = 5710 be64_to_cpu(crq->query_capability.number); 5711 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5712 adapter->rx_vlan_header_insertion); 5713 break; 5714 case MAX_TX_SG_ENTRIES: 5715 adapter->max_tx_sg_entries = 5716 be64_to_cpu(crq->query_capability.number); 5717 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5718 adapter->max_tx_sg_entries); 5719 break; 5720 case RX_SG_SUPPORTED: 5721 adapter->rx_sg_supported = 5722 be64_to_cpu(crq->query_capability.number); 5723 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5724 adapter->rx_sg_supported); 5725 break; 5726 case OPT_TX_COMP_SUB_QUEUES: 5727 adapter->opt_tx_comp_sub_queues = 5728 be64_to_cpu(crq->query_capability.number); 5729 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5730 adapter->opt_tx_comp_sub_queues); 5731 break; 5732 case OPT_RX_COMP_QUEUES: 5733 adapter->opt_rx_comp_queues = 5734 be64_to_cpu(crq->query_capability.number); 5735 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5736 adapter->opt_rx_comp_queues); 5737 break; 5738 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5739 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5740 be64_to_cpu(crq->query_capability.number); 5741 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5742 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5743 break; 5744 case OPT_TX_ENTRIES_PER_SUBCRQ: 5745 adapter->opt_tx_entries_per_subcrq = 5746 be64_to_cpu(crq->query_capability.number); 5747 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5748 adapter->opt_tx_entries_per_subcrq); 5749 break; 5750 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5751 adapter->opt_rxba_entries_per_subcrq = 5752 be64_to_cpu(crq->query_capability.number); 5753 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5754 adapter->opt_rxba_entries_per_subcrq); 5755 break; 5756 case TX_RX_DESC_REQ: 5757 adapter->tx_rx_desc_req = crq->query_capability.number; 5758 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5759 adapter->tx_rx_desc_req); 5760 break; 5761 5762 default: 5763 netdev_err(netdev, "Got invalid cap rsp %d\n", 5764 crq->query_capability.capability); 5765 } 5766 5767 out: 5768 if (atomic_read(&adapter->running_cap_crqs) == 0) 5769 send_request_cap(adapter, 0); 5770 } 5771 5772 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5773 { 5774 union ibmvnic_crq crq; 5775 int rc; 5776 5777 memset(&crq, 0, sizeof(crq)); 5778 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5779 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5780 5781 mutex_lock(&adapter->fw_lock); 5782 adapter->fw_done_rc = 0; 5783 reinit_completion(&adapter->fw_done); 5784 5785 rc = ibmvnic_send_crq(adapter, &crq); 5786 if (rc) { 5787 mutex_unlock(&adapter->fw_lock); 5788 return rc; 5789 } 5790 5791 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5792 if (rc) { 5793 mutex_unlock(&adapter->fw_lock); 5794 return rc; 5795 } 5796 5797 mutex_unlock(&adapter->fw_lock); 5798 return adapter->fw_done_rc ? -EIO : 0; 5799 } 5800 5801 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5802 struct ibmvnic_adapter *adapter) 5803 { 5804 struct net_device *netdev = adapter->netdev; 5805 int rc; 5806 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5807 5808 rc = crq->query_phys_parms_rsp.rc.code; 5809 if (rc) { 5810 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5811 return rc; 5812 } 5813 switch (rspeed) { 5814 case IBMVNIC_10MBPS: 5815 adapter->speed = SPEED_10; 5816 break; 5817 case IBMVNIC_100MBPS: 5818 adapter->speed = SPEED_100; 5819 break; 5820 case IBMVNIC_1GBPS: 5821 adapter->speed = SPEED_1000; 5822 break; 5823 case IBMVNIC_10GBPS: 5824 adapter->speed = SPEED_10000; 5825 break; 5826 case IBMVNIC_25GBPS: 5827 adapter->speed = SPEED_25000; 5828 break; 5829 case IBMVNIC_40GBPS: 5830 adapter->speed = SPEED_40000; 5831 break; 5832 case IBMVNIC_50GBPS: 5833 adapter->speed = SPEED_50000; 5834 break; 5835 case IBMVNIC_100GBPS: 5836 adapter->speed = SPEED_100000; 5837 break; 5838 case IBMVNIC_200GBPS: 5839 adapter->speed = SPEED_200000; 5840 break; 5841 default: 5842 if (netif_carrier_ok(netdev)) 5843 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5844 adapter->speed = SPEED_UNKNOWN; 5845 } 5846 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5847 adapter->duplex = DUPLEX_FULL; 5848 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5849 adapter->duplex = DUPLEX_HALF; 5850 else 5851 adapter->duplex = DUPLEX_UNKNOWN; 5852 5853 return rc; 5854 } 5855 5856 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5857 struct ibmvnic_adapter *adapter) 5858 { 5859 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5860 struct net_device *netdev = adapter->netdev; 5861 struct device *dev = &adapter->vdev->dev; 5862 u64 *u64_crq = (u64 *)crq; 5863 long rc; 5864 5865 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5866 (unsigned long)cpu_to_be64(u64_crq[0]), 5867 (unsigned long)cpu_to_be64(u64_crq[1])); 5868 switch (gen_crq->first) { 5869 case IBMVNIC_CRQ_INIT_RSP: 5870 switch (gen_crq->cmd) { 5871 case IBMVNIC_CRQ_INIT: 5872 dev_info(dev, "Partner initialized\n"); 5873 adapter->from_passive_init = true; 5874 /* Discard any stale login responses from prev reset. 5875 * CHECK: should we clear even on INIT_COMPLETE? 5876 */ 5877 adapter->login_pending = false; 5878 5879 if (adapter->state == VNIC_DOWN) 5880 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5881 else 5882 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5883 5884 if (rc && rc != -EBUSY) { 5885 /* We were unable to schedule the failover 5886 * reset either because the adapter was still 5887 * probing (eg: during kexec) or we could not 5888 * allocate memory. Clear the failover_pending 5889 * flag since no one else will. We ignore 5890 * EBUSY because it means either FAILOVER reset 5891 * is already scheduled or the adapter is 5892 * being removed. 5893 */ 5894 netdev_err(netdev, 5895 "Error %ld scheduling failover reset\n", 5896 rc); 5897 adapter->failover_pending = false; 5898 } 5899 5900 if (!completion_done(&adapter->init_done)) { 5901 if (!adapter->init_done_rc) 5902 adapter->init_done_rc = -EAGAIN; 5903 complete(&adapter->init_done); 5904 } 5905 5906 break; 5907 case IBMVNIC_CRQ_INIT_COMPLETE: 5908 dev_info(dev, "Partner initialization complete\n"); 5909 adapter->crq.active = true; 5910 send_version_xchg(adapter); 5911 break; 5912 default: 5913 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5914 } 5915 return; 5916 case IBMVNIC_CRQ_XPORT_EVENT: 5917 netif_carrier_off(netdev); 5918 adapter->crq.active = false; 5919 /* terminate any thread waiting for a response 5920 * from the device 5921 */ 5922 if (!completion_done(&adapter->fw_done)) { 5923 adapter->fw_done_rc = -EIO; 5924 complete(&adapter->fw_done); 5925 } 5926 5927 /* if we got here during crq-init, retry crq-init */ 5928 if (!completion_done(&adapter->init_done)) { 5929 adapter->init_done_rc = -EAGAIN; 5930 complete(&adapter->init_done); 5931 } 5932 5933 if (!completion_done(&adapter->stats_done)) 5934 complete(&adapter->stats_done); 5935 if (test_bit(0, &adapter->resetting)) 5936 adapter->force_reset_recovery = true; 5937 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5938 dev_info(dev, "Migrated, re-enabling adapter\n"); 5939 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5940 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5941 dev_info(dev, "Backing device failover detected\n"); 5942 adapter->failover_pending = true; 5943 } else { 5944 /* The adapter lost the connection */ 5945 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5946 gen_crq->cmd); 5947 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5948 } 5949 return; 5950 case IBMVNIC_CRQ_CMD_RSP: 5951 break; 5952 default: 5953 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5954 gen_crq->first); 5955 return; 5956 } 5957 5958 switch (gen_crq->cmd) { 5959 case VERSION_EXCHANGE_RSP: 5960 rc = crq->version_exchange_rsp.rc.code; 5961 if (rc) { 5962 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5963 break; 5964 } 5965 ibmvnic_version = 5966 be16_to_cpu(crq->version_exchange_rsp.version); 5967 dev_info(dev, "Partner protocol version is %d\n", 5968 ibmvnic_version); 5969 send_query_cap(adapter); 5970 break; 5971 case QUERY_CAPABILITY_RSP: 5972 handle_query_cap_rsp(crq, adapter); 5973 break; 5974 case QUERY_MAP_RSP: 5975 handle_query_map_rsp(crq, adapter); 5976 break; 5977 case REQUEST_MAP_RSP: 5978 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5979 complete(&adapter->fw_done); 5980 break; 5981 case REQUEST_UNMAP_RSP: 5982 handle_request_unmap_rsp(crq, adapter); 5983 break; 5984 case REQUEST_CAPABILITY_RSP: 5985 handle_request_cap_rsp(crq, adapter); 5986 break; 5987 case LOGIN_RSP: 5988 netdev_dbg(netdev, "Got Login Response\n"); 5989 handle_login_rsp(crq, adapter); 5990 break; 5991 case LOGICAL_LINK_STATE_RSP: 5992 netdev_dbg(netdev, 5993 "Got Logical Link State Response, state: %d rc: %d\n", 5994 crq->logical_link_state_rsp.link_state, 5995 crq->logical_link_state_rsp.rc.code); 5996 adapter->logical_link_state = 5997 crq->logical_link_state_rsp.link_state; 5998 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5999 complete(&adapter->init_done); 6000 break; 6001 case LINK_STATE_INDICATION: 6002 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6003 adapter->phys_link_state = 6004 crq->link_state_indication.phys_link_state; 6005 adapter->logical_link_state = 6006 crq->link_state_indication.logical_link_state; 6007 if (adapter->phys_link_state && adapter->logical_link_state) 6008 netif_carrier_on(netdev); 6009 else 6010 netif_carrier_off(netdev); 6011 break; 6012 case CHANGE_MAC_ADDR_RSP: 6013 netdev_dbg(netdev, "Got MAC address change Response\n"); 6014 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6015 break; 6016 case ERROR_INDICATION: 6017 netdev_dbg(netdev, "Got Error Indication\n"); 6018 handle_error_indication(crq, adapter); 6019 break; 6020 case REQUEST_STATISTICS_RSP: 6021 netdev_dbg(netdev, "Got Statistics Response\n"); 6022 complete(&adapter->stats_done); 6023 break; 6024 case QUERY_IP_OFFLOAD_RSP: 6025 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6026 handle_query_ip_offload_rsp(adapter); 6027 break; 6028 case MULTICAST_CTRL_RSP: 6029 netdev_dbg(netdev, "Got multicast control Response\n"); 6030 break; 6031 case CONTROL_IP_OFFLOAD_RSP: 6032 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6033 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6034 sizeof(adapter->ip_offload_ctrl), 6035 DMA_TO_DEVICE); 6036 complete(&adapter->init_done); 6037 break; 6038 case COLLECT_FW_TRACE_RSP: 6039 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6040 complete(&adapter->fw_done); 6041 break; 6042 case GET_VPD_SIZE_RSP: 6043 handle_vpd_size_rsp(crq, adapter); 6044 break; 6045 case GET_VPD_RSP: 6046 handle_vpd_rsp(crq, adapter); 6047 break; 6048 case QUERY_PHYS_PARMS_RSP: 6049 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6050 complete(&adapter->fw_done); 6051 break; 6052 default: 6053 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6054 gen_crq->cmd); 6055 } 6056 } 6057 6058 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6059 { 6060 struct ibmvnic_adapter *adapter = instance; 6061 6062 tasklet_schedule(&adapter->tasklet); 6063 return IRQ_HANDLED; 6064 } 6065 6066 static void ibmvnic_tasklet(struct tasklet_struct *t) 6067 { 6068 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6069 struct ibmvnic_crq_queue *queue = &adapter->crq; 6070 union ibmvnic_crq *crq; 6071 unsigned long flags; 6072 6073 spin_lock_irqsave(&queue->lock, flags); 6074 6075 /* Pull all the valid messages off the CRQ */ 6076 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6077 /* This barrier makes sure ibmvnic_next_crq()'s 6078 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6079 * before ibmvnic_handle_crq()'s 6080 * switch(gen_crq->first) and switch(gen_crq->cmd). 6081 */ 6082 dma_rmb(); 6083 ibmvnic_handle_crq(crq, adapter); 6084 crq->generic.first = 0; 6085 } 6086 6087 spin_unlock_irqrestore(&queue->lock, flags); 6088 } 6089 6090 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6091 { 6092 struct vio_dev *vdev = adapter->vdev; 6093 int rc; 6094 6095 do { 6096 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6097 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6098 6099 if (rc) 6100 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6101 6102 return rc; 6103 } 6104 6105 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6106 { 6107 struct ibmvnic_crq_queue *crq = &adapter->crq; 6108 struct device *dev = &adapter->vdev->dev; 6109 struct vio_dev *vdev = adapter->vdev; 6110 int rc; 6111 6112 /* Close the CRQ */ 6113 do { 6114 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6115 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6116 6117 /* Clean out the queue */ 6118 if (!crq->msgs) 6119 return -EINVAL; 6120 6121 memset(crq->msgs, 0, PAGE_SIZE); 6122 crq->cur = 0; 6123 crq->active = false; 6124 6125 /* And re-open it again */ 6126 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6127 crq->msg_token, PAGE_SIZE); 6128 6129 if (rc == H_CLOSED) 6130 /* Adapter is good, but other end is not ready */ 6131 dev_warn(dev, "Partner adapter not ready\n"); 6132 else if (rc != 0) 6133 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6134 6135 return rc; 6136 } 6137 6138 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6139 { 6140 struct ibmvnic_crq_queue *crq = &adapter->crq; 6141 struct vio_dev *vdev = adapter->vdev; 6142 long rc; 6143 6144 if (!crq->msgs) 6145 return; 6146 6147 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6148 free_irq(vdev->irq, adapter); 6149 tasklet_kill(&adapter->tasklet); 6150 do { 6151 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6152 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6153 6154 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6155 DMA_BIDIRECTIONAL); 6156 free_page((unsigned long)crq->msgs); 6157 crq->msgs = NULL; 6158 crq->active = false; 6159 } 6160 6161 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6162 { 6163 struct ibmvnic_crq_queue *crq = &adapter->crq; 6164 struct device *dev = &adapter->vdev->dev; 6165 struct vio_dev *vdev = adapter->vdev; 6166 int rc, retrc = -ENOMEM; 6167 6168 if (crq->msgs) 6169 return 0; 6170 6171 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6172 /* Should we allocate more than one page? */ 6173 6174 if (!crq->msgs) 6175 return -ENOMEM; 6176 6177 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6178 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6179 DMA_BIDIRECTIONAL); 6180 if (dma_mapping_error(dev, crq->msg_token)) 6181 goto map_failed; 6182 6183 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6184 crq->msg_token, PAGE_SIZE); 6185 6186 if (rc == H_RESOURCE) 6187 /* maybe kexecing and resource is busy. try a reset */ 6188 rc = ibmvnic_reset_crq(adapter); 6189 retrc = rc; 6190 6191 if (rc == H_CLOSED) { 6192 dev_warn(dev, "Partner adapter not ready\n"); 6193 } else if (rc) { 6194 dev_warn(dev, "Error %d opening adapter\n", rc); 6195 goto reg_crq_failed; 6196 } 6197 6198 retrc = 0; 6199 6200 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6201 6202 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6203 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6204 adapter->vdev->unit_address); 6205 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6206 if (rc) { 6207 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6208 vdev->irq, rc); 6209 goto req_irq_failed; 6210 } 6211 6212 rc = vio_enable_interrupts(vdev); 6213 if (rc) { 6214 dev_err(dev, "Error %d enabling interrupts\n", rc); 6215 goto req_irq_failed; 6216 } 6217 6218 crq->cur = 0; 6219 spin_lock_init(&crq->lock); 6220 6221 /* process any CRQs that were queued before we enabled interrupts */ 6222 tasklet_schedule(&adapter->tasklet); 6223 6224 return retrc; 6225 6226 req_irq_failed: 6227 tasklet_kill(&adapter->tasklet); 6228 do { 6229 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6230 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6231 reg_crq_failed: 6232 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6233 map_failed: 6234 free_page((unsigned long)crq->msgs); 6235 crq->msgs = NULL; 6236 return retrc; 6237 } 6238 6239 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6240 { 6241 struct device *dev = &adapter->vdev->dev; 6242 unsigned long timeout = msecs_to_jiffies(20000); 6243 u64 old_num_rx_queues = adapter->req_rx_queues; 6244 u64 old_num_tx_queues = adapter->req_tx_queues; 6245 int rc; 6246 6247 adapter->from_passive_init = false; 6248 6249 rc = ibmvnic_send_crq_init(adapter); 6250 if (rc) { 6251 dev_err(dev, "Send crq init failed with error %d\n", rc); 6252 return rc; 6253 } 6254 6255 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6256 dev_err(dev, "Initialization sequence timed out\n"); 6257 return -ETIMEDOUT; 6258 } 6259 6260 if (adapter->init_done_rc) { 6261 release_crq_queue(adapter); 6262 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6263 return adapter->init_done_rc; 6264 } 6265 6266 if (adapter->from_passive_init) { 6267 adapter->state = VNIC_OPEN; 6268 adapter->from_passive_init = false; 6269 dev_err(dev, "CRQ-init failed, passive-init\n"); 6270 return -EINVAL; 6271 } 6272 6273 if (reset && 6274 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6275 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6276 if (adapter->req_rx_queues != old_num_rx_queues || 6277 adapter->req_tx_queues != old_num_tx_queues) { 6278 release_sub_crqs(adapter, 0); 6279 rc = init_sub_crqs(adapter); 6280 } else { 6281 /* no need to reinitialize completely, but we do 6282 * need to clean up transmits that were in flight 6283 * when we processed the reset. Failure to do so 6284 * will confound the upper layer, usually TCP, by 6285 * creating the illusion of transmits that are 6286 * awaiting completion. 6287 */ 6288 clean_tx_pools(adapter); 6289 6290 rc = reset_sub_crq_queues(adapter); 6291 } 6292 } else { 6293 rc = init_sub_crqs(adapter); 6294 } 6295 6296 if (rc) { 6297 dev_err(dev, "Initialization of sub crqs failed\n"); 6298 release_crq_queue(adapter); 6299 return rc; 6300 } 6301 6302 rc = init_sub_crq_irqs(adapter); 6303 if (rc) { 6304 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6305 release_crq_queue(adapter); 6306 } 6307 6308 return rc; 6309 } 6310 6311 static struct device_attribute dev_attr_failover; 6312 6313 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6314 { 6315 struct ibmvnic_adapter *adapter; 6316 struct net_device *netdev; 6317 unsigned char *mac_addr_p; 6318 unsigned long flags; 6319 bool init_success; 6320 int rc; 6321 6322 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6323 dev->unit_address); 6324 6325 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6326 VETH_MAC_ADDR, NULL); 6327 if (!mac_addr_p) { 6328 dev_err(&dev->dev, 6329 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6330 __FILE__, __LINE__); 6331 return 0; 6332 } 6333 6334 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6335 IBMVNIC_MAX_QUEUES); 6336 if (!netdev) 6337 return -ENOMEM; 6338 6339 adapter = netdev_priv(netdev); 6340 adapter->state = VNIC_PROBING; 6341 dev_set_drvdata(&dev->dev, netdev); 6342 adapter->vdev = dev; 6343 adapter->netdev = netdev; 6344 adapter->login_pending = false; 6345 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6346 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6347 bitmap_set(adapter->map_ids, 0, 1); 6348 6349 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6350 eth_hw_addr_set(netdev, adapter->mac_addr); 6351 netdev->irq = dev->irq; 6352 netdev->netdev_ops = &ibmvnic_netdev_ops; 6353 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6354 SET_NETDEV_DEV(netdev, &dev->dev); 6355 6356 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6357 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6358 __ibmvnic_delayed_reset); 6359 INIT_LIST_HEAD(&adapter->rwi_list); 6360 spin_lock_init(&adapter->rwi_lock); 6361 spin_lock_init(&adapter->state_lock); 6362 mutex_init(&adapter->fw_lock); 6363 init_completion(&adapter->probe_done); 6364 init_completion(&adapter->init_done); 6365 init_completion(&adapter->fw_done); 6366 init_completion(&adapter->reset_done); 6367 init_completion(&adapter->stats_done); 6368 clear_bit(0, &adapter->resetting); 6369 adapter->prev_rx_buf_sz = 0; 6370 adapter->prev_mtu = 0; 6371 6372 init_success = false; 6373 do { 6374 reinit_init_done(adapter); 6375 6376 /* clear any failovers we got in the previous pass 6377 * since we are reinitializing the CRQ 6378 */ 6379 adapter->failover_pending = false; 6380 6381 /* If we had already initialized CRQ, we may have one or 6382 * more resets queued already. Discard those and release 6383 * the CRQ before initializing the CRQ again. 6384 */ 6385 release_crq_queue(adapter); 6386 6387 /* Since we are still in PROBING state, __ibmvnic_reset() 6388 * will not access the ->rwi_list and since we released CRQ, 6389 * we won't get _new_ transport events. But there maybe an 6390 * ongoing ibmvnic_reset() call. So serialize access to 6391 * rwi_list. If we win the race, ibvmnic_reset() could add 6392 * a reset after we purged but thats ok - we just may end 6393 * up with an extra reset (i.e similar to having two or more 6394 * resets in the queue at once). 6395 * CHECK. 6396 */ 6397 spin_lock_irqsave(&adapter->rwi_lock, flags); 6398 flush_reset_queue(adapter); 6399 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6400 6401 rc = init_crq_queue(adapter); 6402 if (rc) { 6403 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6404 rc); 6405 goto ibmvnic_init_fail; 6406 } 6407 6408 rc = ibmvnic_reset_init(adapter, false); 6409 } while (rc == -EAGAIN); 6410 6411 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6412 * partner is not ready. CRQ is not active. When the partner becomes 6413 * ready, we will do the passive init reset. 6414 */ 6415 6416 if (!rc) 6417 init_success = true; 6418 6419 rc = init_stats_buffers(adapter); 6420 if (rc) 6421 goto ibmvnic_init_fail; 6422 6423 rc = init_stats_token(adapter); 6424 if (rc) 6425 goto ibmvnic_stats_fail; 6426 6427 rc = device_create_file(&dev->dev, &dev_attr_failover); 6428 if (rc) 6429 goto ibmvnic_dev_file_err; 6430 6431 netif_carrier_off(netdev); 6432 6433 if (init_success) { 6434 adapter->state = VNIC_PROBED; 6435 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6436 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6437 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6438 } else { 6439 adapter->state = VNIC_DOWN; 6440 } 6441 6442 adapter->wait_for_reset = false; 6443 adapter->last_reset_time = jiffies; 6444 6445 rc = register_netdev(netdev); 6446 if (rc) { 6447 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6448 goto ibmvnic_register_fail; 6449 } 6450 dev_info(&dev->dev, "ibmvnic registered\n"); 6451 6452 rc = ibmvnic_cpu_notif_add(adapter); 6453 if (rc) { 6454 netdev_err(netdev, "Registering cpu notifier failed\n"); 6455 goto cpu_notif_add_failed; 6456 } 6457 6458 complete(&adapter->probe_done); 6459 6460 return 0; 6461 6462 cpu_notif_add_failed: 6463 unregister_netdev(netdev); 6464 6465 ibmvnic_register_fail: 6466 device_remove_file(&dev->dev, &dev_attr_failover); 6467 6468 ibmvnic_dev_file_err: 6469 release_stats_token(adapter); 6470 6471 ibmvnic_stats_fail: 6472 release_stats_buffers(adapter); 6473 6474 ibmvnic_init_fail: 6475 release_sub_crqs(adapter, 1); 6476 release_crq_queue(adapter); 6477 6478 /* cleanup worker thread after releasing CRQ so we don't get 6479 * transport events (i.e new work items for the worker thread). 6480 */ 6481 adapter->state = VNIC_REMOVING; 6482 complete(&adapter->probe_done); 6483 flush_work(&adapter->ibmvnic_reset); 6484 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6485 6486 flush_reset_queue(adapter); 6487 6488 mutex_destroy(&adapter->fw_lock); 6489 free_netdev(netdev); 6490 6491 return rc; 6492 } 6493 6494 static void ibmvnic_remove(struct vio_dev *dev) 6495 { 6496 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6497 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6498 unsigned long flags; 6499 6500 spin_lock_irqsave(&adapter->state_lock, flags); 6501 6502 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6503 * finish. Then, set the state to REMOVING to prevent it from 6504 * scheduling any more work and to have reset functions ignore 6505 * any resets that have already been scheduled. Drop the lock 6506 * after setting state, so __ibmvnic_reset() which is called 6507 * from the flush_work() below, can make progress. 6508 */ 6509 spin_lock(&adapter->rwi_lock); 6510 adapter->state = VNIC_REMOVING; 6511 spin_unlock(&adapter->rwi_lock); 6512 6513 spin_unlock_irqrestore(&adapter->state_lock, flags); 6514 6515 ibmvnic_cpu_notif_remove(adapter); 6516 6517 flush_work(&adapter->ibmvnic_reset); 6518 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6519 6520 rtnl_lock(); 6521 unregister_netdevice(netdev); 6522 6523 release_resources(adapter); 6524 release_rx_pools(adapter); 6525 release_tx_pools(adapter); 6526 release_sub_crqs(adapter, 1); 6527 release_crq_queue(adapter); 6528 6529 release_stats_token(adapter); 6530 release_stats_buffers(adapter); 6531 6532 adapter->state = VNIC_REMOVED; 6533 6534 rtnl_unlock(); 6535 mutex_destroy(&adapter->fw_lock); 6536 device_remove_file(&dev->dev, &dev_attr_failover); 6537 free_netdev(netdev); 6538 dev_set_drvdata(&dev->dev, NULL); 6539 } 6540 6541 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6542 const char *buf, size_t count) 6543 { 6544 struct net_device *netdev = dev_get_drvdata(dev); 6545 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6546 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6547 __be64 session_token; 6548 long rc; 6549 6550 if (!sysfs_streq(buf, "1")) 6551 return -EINVAL; 6552 6553 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6554 H_GET_SESSION_TOKEN, 0, 0, 0); 6555 if (rc) { 6556 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6557 rc); 6558 goto last_resort; 6559 } 6560 6561 session_token = (__be64)retbuf[0]; 6562 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6563 be64_to_cpu(session_token)); 6564 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6565 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6566 if (rc) { 6567 netdev_err(netdev, 6568 "H_VIOCTL initiated failover failed, rc %ld\n", 6569 rc); 6570 goto last_resort; 6571 } 6572 6573 return count; 6574 6575 last_resort: 6576 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6577 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6578 6579 return count; 6580 } 6581 static DEVICE_ATTR_WO(failover); 6582 6583 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6584 { 6585 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6586 struct ibmvnic_adapter *adapter; 6587 struct iommu_table *tbl; 6588 unsigned long ret = 0; 6589 int i; 6590 6591 tbl = get_iommu_table_base(&vdev->dev); 6592 6593 /* netdev inits at probe time along with the structures we need below*/ 6594 if (!netdev) 6595 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6596 6597 adapter = netdev_priv(netdev); 6598 6599 ret += PAGE_SIZE; /* the crq message queue */ 6600 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6601 6602 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6603 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6604 6605 for (i = 0; i < adapter->num_active_rx_pools; i++) 6606 ret += adapter->rx_pool[i].size * 6607 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6608 6609 return ret; 6610 } 6611 6612 static int ibmvnic_resume(struct device *dev) 6613 { 6614 struct net_device *netdev = dev_get_drvdata(dev); 6615 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6616 6617 if (adapter->state != VNIC_OPEN) 6618 return 0; 6619 6620 tasklet_schedule(&adapter->tasklet); 6621 6622 return 0; 6623 } 6624 6625 static const struct vio_device_id ibmvnic_device_table[] = { 6626 {"network", "IBM,vnic"}, 6627 {"", "" } 6628 }; 6629 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6630 6631 static const struct dev_pm_ops ibmvnic_pm_ops = { 6632 .resume = ibmvnic_resume 6633 }; 6634 6635 static struct vio_driver ibmvnic_driver = { 6636 .id_table = ibmvnic_device_table, 6637 .probe = ibmvnic_probe, 6638 .remove = ibmvnic_remove, 6639 .get_desired_dma = ibmvnic_get_desired_dma, 6640 .name = ibmvnic_driver_name, 6641 .pm = &ibmvnic_pm_ops, 6642 }; 6643 6644 /* module functions */ 6645 static int __init ibmvnic_module_init(void) 6646 { 6647 int ret; 6648 6649 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6650 ibmvnic_cpu_online, 6651 ibmvnic_cpu_down_prep); 6652 if (ret < 0) 6653 goto out; 6654 ibmvnic_online = ret; 6655 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6656 NULL, ibmvnic_cpu_dead); 6657 if (ret) 6658 goto err_dead; 6659 6660 ret = vio_register_driver(&ibmvnic_driver); 6661 if (ret) 6662 goto err_vio_register; 6663 6664 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6665 IBMVNIC_DRIVER_VERSION); 6666 6667 return 0; 6668 err_vio_register: 6669 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6670 err_dead: 6671 cpuhp_remove_multi_state(ibmvnic_online); 6672 out: 6673 return ret; 6674 } 6675 6676 static void __exit ibmvnic_module_exit(void) 6677 { 6678 vio_unregister_driver(&ibmvnic_driver); 6679 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6680 cpuhp_remove_multi_state(ibmvnic_online); 6681 } 6682 6683 module_init(ibmvnic_module_init); 6684 module_exit(ibmvnic_module_exit); 6685