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 rc; 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 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2428 if (lpar_rc != H_SUCCESS) 2429 goto tx_err; 2430 goto out; 2431 } 2432 2433 if (skb_is_gso(skb)) 2434 tx_pool = &adapter->tso_pool[queue_num]; 2435 else 2436 tx_pool = &adapter->tx_pool[queue_num]; 2437 2438 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2439 2440 if (bufidx == IBMVNIC_INVALID_MAP) { 2441 dev_kfree_skb_any(skb); 2442 tx_send_failed++; 2443 tx_dropped++; 2444 ret = NETDEV_TX_OK; 2445 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2446 if (lpar_rc != H_SUCCESS) 2447 goto tx_err; 2448 goto out; 2449 } 2450 2451 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2452 2453 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2454 2455 dst = ltb->buff + offset; 2456 memset(dst, 0, tx_pool->buf_size); 2457 data_dma_addr = ltb->addr + offset; 2458 2459 if (skb_shinfo(skb)->nr_frags) { 2460 int cur, i; 2461 2462 /* Copy the head */ 2463 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2464 cur = skb_headlen(skb); 2465 2466 /* Copy the frags */ 2467 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2468 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2469 2470 memcpy(dst + cur, skb_frag_address(frag), 2471 skb_frag_size(frag)); 2472 cur += skb_frag_size(frag); 2473 } 2474 } else { 2475 skb_copy_from_linear_data(skb, dst, skb->len); 2476 } 2477 2478 /* post changes to long_term_buff *dst before VIOS accessing it */ 2479 dma_wmb(); 2480 2481 tx_pool->consumer_index = 2482 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2483 2484 tx_buff = &tx_pool->tx_buff[bufidx]; 2485 2486 /* Sanity checks on our free map to make sure it points to an index 2487 * that is not being occupied by another skb. If skb memory is 2488 * not freed then we see congestion control kick in and halt tx. 2489 */ 2490 if (unlikely(tx_buff->skb)) { 2491 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n", 2492 skb_is_gso(skb) ? "tso_pool" : "tx_pool", 2493 queue_num, bufidx); 2494 dev_kfree_skb_any(tx_buff->skb); 2495 } 2496 2497 tx_buff->skb = skb; 2498 tx_buff->index = bufidx; 2499 tx_buff->pool_index = queue_num; 2500 2501 memset(&tx_crq, 0, sizeof(tx_crq)); 2502 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2503 tx_crq.v1.type = IBMVNIC_TX_DESC; 2504 tx_crq.v1.n_crq_elem = 1; 2505 tx_crq.v1.n_sge = 1; 2506 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2507 2508 if (skb_is_gso(skb)) 2509 tx_crq.v1.correlator = 2510 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2511 else 2512 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2513 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2514 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2515 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2516 2517 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2518 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2519 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2520 } 2521 2522 if (skb->protocol == htons(ETH_P_IP)) { 2523 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2524 proto = ip_hdr(skb)->protocol; 2525 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2526 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2527 proto = ipv6_hdr(skb)->nexthdr; 2528 } 2529 2530 if (proto == IPPROTO_TCP) 2531 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2532 else if (proto == IPPROTO_UDP) 2533 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2534 2535 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2536 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2537 hdrs += 2; 2538 } 2539 if (skb_is_gso(skb)) { 2540 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2541 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2542 hdrs += 2; 2543 } 2544 2545 if ((*hdrs >> 7) & 1) 2546 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2547 2548 tx_crq.v1.n_crq_elem = num_entries; 2549 tx_buff->num_entries = num_entries; 2550 /* flush buffer if current entry can not fit */ 2551 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2552 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2553 if (lpar_rc != H_SUCCESS) 2554 goto tx_flush_err; 2555 } 2556 2557 indir_arr[0] = tx_crq; 2558 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2559 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2560 ind_bufp->index += num_entries; 2561 if (__netdev_tx_sent_queue(txq, skb->len, 2562 netdev_xmit_more() && 2563 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2564 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2565 if (lpar_rc != H_SUCCESS) 2566 goto tx_err; 2567 } 2568 2569 if (atomic_add_return(num_entries, &tx_scrq->used) 2570 >= adapter->req_tx_entries_per_subcrq) { 2571 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2572 netif_stop_subqueue(netdev, queue_num); 2573 } 2574 2575 tx_packets++; 2576 tx_bytes += skb->len; 2577 txq_trans_cond_update(txq); 2578 ret = NETDEV_TX_OK; 2579 goto out; 2580 2581 tx_flush_err: 2582 dev_kfree_skb_any(skb); 2583 tx_buff->skb = NULL; 2584 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2585 tx_pool->num_buffers - 1 : 2586 tx_pool->consumer_index - 1; 2587 tx_dropped++; 2588 tx_err: 2589 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2590 dev_err_ratelimited(dev, "tx: send failed\n"); 2591 2592 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2593 /* Disable TX and report carrier off if queue is closed 2594 * or pending failover. 2595 * Firmware guarantees that a signal will be sent to the 2596 * driver, triggering a reset or some other action. 2597 */ 2598 netif_tx_stop_all_queues(netdev); 2599 netif_carrier_off(netdev); 2600 } 2601 out: 2602 rcu_read_unlock(); 2603 netdev->stats.tx_dropped += tx_dropped; 2604 netdev->stats.tx_bytes += tx_bytes; 2605 netdev->stats.tx_packets += tx_packets; 2606 adapter->tx_send_failed += tx_send_failed; 2607 adapter->tx_map_failed += tx_map_failed; 2608 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2609 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2610 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2611 2612 return ret; 2613 } 2614 2615 static void ibmvnic_set_multi(struct net_device *netdev) 2616 { 2617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2618 struct netdev_hw_addr *ha; 2619 union ibmvnic_crq crq; 2620 2621 memset(&crq, 0, sizeof(crq)); 2622 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2623 crq.request_capability.cmd = REQUEST_CAPABILITY; 2624 2625 if (netdev->flags & IFF_PROMISC) { 2626 if (!adapter->promisc_supported) 2627 return; 2628 } else { 2629 if (netdev->flags & IFF_ALLMULTI) { 2630 /* Accept all multicast */ 2631 memset(&crq, 0, sizeof(crq)); 2632 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2633 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2634 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2635 ibmvnic_send_crq(adapter, &crq); 2636 } else if (netdev_mc_empty(netdev)) { 2637 /* Reject all multicast */ 2638 memset(&crq, 0, sizeof(crq)); 2639 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2640 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2641 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2642 ibmvnic_send_crq(adapter, &crq); 2643 } else { 2644 /* Accept one or more multicast(s) */ 2645 netdev_for_each_mc_addr(ha, netdev) { 2646 memset(&crq, 0, sizeof(crq)); 2647 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2648 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2649 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2650 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2651 ha->addr); 2652 ibmvnic_send_crq(adapter, &crq); 2653 } 2654 } 2655 } 2656 } 2657 2658 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2659 { 2660 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2661 union ibmvnic_crq crq; 2662 int rc; 2663 2664 if (!is_valid_ether_addr(dev_addr)) { 2665 rc = -EADDRNOTAVAIL; 2666 goto err; 2667 } 2668 2669 memset(&crq, 0, sizeof(crq)); 2670 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2671 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2672 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2673 2674 mutex_lock(&adapter->fw_lock); 2675 adapter->fw_done_rc = 0; 2676 reinit_completion(&adapter->fw_done); 2677 2678 rc = ibmvnic_send_crq(adapter, &crq); 2679 if (rc) { 2680 rc = -EIO; 2681 mutex_unlock(&adapter->fw_lock); 2682 goto err; 2683 } 2684 2685 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2686 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2687 if (rc || adapter->fw_done_rc) { 2688 rc = -EIO; 2689 mutex_unlock(&adapter->fw_lock); 2690 goto err; 2691 } 2692 mutex_unlock(&adapter->fw_lock); 2693 return 0; 2694 err: 2695 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2696 return rc; 2697 } 2698 2699 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2700 { 2701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2702 struct sockaddr *addr = p; 2703 int rc; 2704 2705 rc = 0; 2706 if (!is_valid_ether_addr(addr->sa_data)) 2707 return -EADDRNOTAVAIL; 2708 2709 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2710 if (adapter->state != VNIC_PROBED) 2711 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2712 2713 return rc; 2714 } 2715 2716 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2717 { 2718 switch (reason) { 2719 case VNIC_RESET_FAILOVER: 2720 return "FAILOVER"; 2721 case VNIC_RESET_MOBILITY: 2722 return "MOBILITY"; 2723 case VNIC_RESET_FATAL: 2724 return "FATAL"; 2725 case VNIC_RESET_NON_FATAL: 2726 return "NON_FATAL"; 2727 case VNIC_RESET_TIMEOUT: 2728 return "TIMEOUT"; 2729 case VNIC_RESET_CHANGE_PARAM: 2730 return "CHANGE_PARAM"; 2731 case VNIC_RESET_PASSIVE_INIT: 2732 return "PASSIVE_INIT"; 2733 } 2734 return "UNKNOWN"; 2735 } 2736 2737 /* 2738 * Initialize the init_done completion and return code values. We 2739 * can get a transport event just after registering the CRQ and the 2740 * tasklet will use this to communicate the transport event. To ensure 2741 * we don't miss the notification/error, initialize these _before_ 2742 * regisering the CRQ. 2743 */ 2744 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2745 { 2746 reinit_completion(&adapter->init_done); 2747 adapter->init_done_rc = 0; 2748 } 2749 2750 /* 2751 * do_reset returns zero if we are able to keep processing reset events, or 2752 * non-zero if we hit a fatal error and must halt. 2753 */ 2754 static int do_reset(struct ibmvnic_adapter *adapter, 2755 struct ibmvnic_rwi *rwi, u32 reset_state) 2756 { 2757 struct net_device *netdev = adapter->netdev; 2758 u64 old_num_rx_queues, old_num_tx_queues; 2759 u64 old_num_rx_slots, old_num_tx_slots; 2760 int rc; 2761 2762 netdev_dbg(adapter->netdev, 2763 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2764 adapter_state_to_string(adapter->state), 2765 adapter->failover_pending, 2766 reset_reason_to_string(rwi->reset_reason), 2767 adapter_state_to_string(reset_state)); 2768 2769 adapter->reset_reason = rwi->reset_reason; 2770 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2771 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2772 rtnl_lock(); 2773 2774 /* Now that we have the rtnl lock, clear any pending failover. 2775 * This will ensure ibmvnic_open() has either completed or will 2776 * block until failover is complete. 2777 */ 2778 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2779 adapter->failover_pending = false; 2780 2781 /* read the state and check (again) after getting rtnl */ 2782 reset_state = adapter->state; 2783 2784 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2785 rc = -EBUSY; 2786 goto out; 2787 } 2788 2789 netif_carrier_off(netdev); 2790 2791 old_num_rx_queues = adapter->req_rx_queues; 2792 old_num_tx_queues = adapter->req_tx_queues; 2793 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2794 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2795 2796 ibmvnic_cleanup(netdev); 2797 2798 if (reset_state == VNIC_OPEN && 2799 adapter->reset_reason != VNIC_RESET_MOBILITY && 2800 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2801 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2802 rc = __ibmvnic_close(netdev); 2803 if (rc) 2804 goto out; 2805 } else { 2806 adapter->state = VNIC_CLOSING; 2807 2808 /* Release the RTNL lock before link state change and 2809 * re-acquire after the link state change to allow 2810 * linkwatch_event to grab the RTNL lock and run during 2811 * a reset. 2812 */ 2813 rtnl_unlock(); 2814 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2815 rtnl_lock(); 2816 if (rc) 2817 goto out; 2818 2819 if (adapter->state == VNIC_OPEN) { 2820 /* When we dropped rtnl, ibmvnic_open() got 2821 * it and noticed that we are resetting and 2822 * set the adapter state to OPEN. Update our 2823 * new "target" state, and resume the reset 2824 * from VNIC_CLOSING state. 2825 */ 2826 netdev_dbg(netdev, 2827 "Open changed state from %s, updating.\n", 2828 adapter_state_to_string(reset_state)); 2829 reset_state = VNIC_OPEN; 2830 adapter->state = VNIC_CLOSING; 2831 } 2832 2833 if (adapter->state != VNIC_CLOSING) { 2834 /* If someone else changed the adapter state 2835 * when we dropped the rtnl, fail the reset 2836 */ 2837 rc = -EAGAIN; 2838 goto out; 2839 } 2840 adapter->state = VNIC_CLOSED; 2841 } 2842 } 2843 2844 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2845 release_resources(adapter); 2846 release_sub_crqs(adapter, 1); 2847 release_crq_queue(adapter); 2848 } 2849 2850 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2851 /* remove the closed state so when we call open it appears 2852 * we are coming from the probed state. 2853 */ 2854 adapter->state = VNIC_PROBED; 2855 2856 reinit_init_done(adapter); 2857 2858 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2859 rc = init_crq_queue(adapter); 2860 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2861 rc = ibmvnic_reenable_crq_queue(adapter); 2862 release_sub_crqs(adapter, 1); 2863 } else { 2864 rc = ibmvnic_reset_crq(adapter); 2865 if (rc == H_CLOSED || rc == H_SUCCESS) { 2866 rc = vio_enable_interrupts(adapter->vdev); 2867 if (rc) 2868 netdev_err(adapter->netdev, 2869 "Reset failed to enable interrupts. rc=%d\n", 2870 rc); 2871 } 2872 } 2873 2874 if (rc) { 2875 netdev_err(adapter->netdev, 2876 "Reset couldn't initialize crq. rc=%d\n", rc); 2877 goto out; 2878 } 2879 2880 rc = ibmvnic_reset_init(adapter, true); 2881 if (rc) 2882 goto out; 2883 2884 /* If the adapter was in PROBE or DOWN state prior to the reset, 2885 * exit here. 2886 */ 2887 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2888 rc = 0; 2889 goto out; 2890 } 2891 2892 rc = ibmvnic_login(netdev); 2893 if (rc) 2894 goto out; 2895 2896 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2897 rc = init_resources(adapter); 2898 if (rc) 2899 goto out; 2900 } else if (adapter->req_rx_queues != old_num_rx_queues || 2901 adapter->req_tx_queues != old_num_tx_queues || 2902 adapter->req_rx_add_entries_per_subcrq != 2903 old_num_rx_slots || 2904 adapter->req_tx_entries_per_subcrq != 2905 old_num_tx_slots || 2906 !adapter->rx_pool || 2907 !adapter->tso_pool || 2908 !adapter->tx_pool) { 2909 release_napi(adapter); 2910 release_vpd_data(adapter); 2911 2912 rc = init_resources(adapter); 2913 if (rc) 2914 goto out; 2915 2916 } else { 2917 rc = init_tx_pools(netdev); 2918 if (rc) { 2919 netdev_dbg(netdev, 2920 "init tx pools failed (%d)\n", 2921 rc); 2922 goto out; 2923 } 2924 2925 rc = init_rx_pools(netdev); 2926 if (rc) { 2927 netdev_dbg(netdev, 2928 "init rx pools failed (%d)\n", 2929 rc); 2930 goto out; 2931 } 2932 } 2933 ibmvnic_disable_irqs(adapter); 2934 } 2935 adapter->state = VNIC_CLOSED; 2936 2937 if (reset_state == VNIC_CLOSED) { 2938 rc = 0; 2939 goto out; 2940 } 2941 2942 rc = __ibmvnic_open(netdev); 2943 if (rc) { 2944 rc = IBMVNIC_OPEN_FAILED; 2945 goto out; 2946 } 2947 2948 /* refresh device's multicast list */ 2949 ibmvnic_set_multi(netdev); 2950 2951 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2952 adapter->reset_reason == VNIC_RESET_MOBILITY) 2953 __netdev_notify_peers(netdev); 2954 2955 rc = 0; 2956 2957 out: 2958 /* restore the adapter state if reset failed */ 2959 if (rc) 2960 adapter->state = reset_state; 2961 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2962 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2963 rtnl_unlock(); 2964 2965 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2966 adapter_state_to_string(adapter->state), 2967 adapter->failover_pending, rc); 2968 return rc; 2969 } 2970 2971 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2972 struct ibmvnic_rwi *rwi, u32 reset_state) 2973 { 2974 struct net_device *netdev = adapter->netdev; 2975 int rc; 2976 2977 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2978 reset_reason_to_string(rwi->reset_reason)); 2979 2980 /* read the state and check (again) after getting rtnl */ 2981 reset_state = adapter->state; 2982 2983 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2984 rc = -EBUSY; 2985 goto out; 2986 } 2987 2988 netif_carrier_off(netdev); 2989 adapter->reset_reason = rwi->reset_reason; 2990 2991 ibmvnic_cleanup(netdev); 2992 release_resources(adapter); 2993 release_sub_crqs(adapter, 0); 2994 release_crq_queue(adapter); 2995 2996 /* remove the closed state so when we call open it appears 2997 * we are coming from the probed state. 2998 */ 2999 adapter->state = VNIC_PROBED; 3000 3001 reinit_init_done(adapter); 3002 3003 rc = init_crq_queue(adapter); 3004 if (rc) { 3005 netdev_err(adapter->netdev, 3006 "Couldn't initialize crq. rc=%d\n", rc); 3007 goto out; 3008 } 3009 3010 rc = ibmvnic_reset_init(adapter, false); 3011 if (rc) 3012 goto out; 3013 3014 /* If the adapter was in PROBE or DOWN state prior to the reset, 3015 * exit here. 3016 */ 3017 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3018 goto out; 3019 3020 rc = ibmvnic_login(netdev); 3021 if (rc) 3022 goto out; 3023 3024 rc = init_resources(adapter); 3025 if (rc) 3026 goto out; 3027 3028 ibmvnic_disable_irqs(adapter); 3029 adapter->state = VNIC_CLOSED; 3030 3031 if (reset_state == VNIC_CLOSED) 3032 goto out; 3033 3034 rc = __ibmvnic_open(netdev); 3035 if (rc) { 3036 rc = IBMVNIC_OPEN_FAILED; 3037 goto out; 3038 } 3039 3040 __netdev_notify_peers(netdev); 3041 out: 3042 /* restore adapter state if reset failed */ 3043 if (rc) 3044 adapter->state = reset_state; 3045 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3046 adapter_state_to_string(adapter->state), 3047 adapter->failover_pending, rc); 3048 return rc; 3049 } 3050 3051 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3052 { 3053 struct ibmvnic_rwi *rwi; 3054 unsigned long flags; 3055 3056 spin_lock_irqsave(&adapter->rwi_lock, flags); 3057 3058 if (!list_empty(&adapter->rwi_list)) { 3059 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3060 list); 3061 list_del(&rwi->list); 3062 } else { 3063 rwi = NULL; 3064 } 3065 3066 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3067 return rwi; 3068 } 3069 3070 /** 3071 * do_passive_init - complete probing when partner device is detected. 3072 * @adapter: ibmvnic_adapter struct 3073 * 3074 * If the ibmvnic device does not have a partner device to communicate with at boot 3075 * and that partner device comes online at a later time, this function is called 3076 * to complete the initialization process of ibmvnic device. 3077 * Caller is expected to hold rtnl_lock(). 3078 * 3079 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3080 * in the down state. 3081 * Returns 0 upon success and the device is in PROBED state. 3082 */ 3083 3084 static int do_passive_init(struct ibmvnic_adapter *adapter) 3085 { 3086 unsigned long timeout = msecs_to_jiffies(30000); 3087 struct net_device *netdev = adapter->netdev; 3088 struct device *dev = &adapter->vdev->dev; 3089 int rc; 3090 3091 netdev_dbg(netdev, "Partner device found, probing.\n"); 3092 3093 adapter->state = VNIC_PROBING; 3094 reinit_completion(&adapter->init_done); 3095 adapter->init_done_rc = 0; 3096 adapter->crq.active = true; 3097 3098 rc = send_crq_init_complete(adapter); 3099 if (rc) 3100 goto out; 3101 3102 rc = send_version_xchg(adapter); 3103 if (rc) 3104 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3105 3106 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3107 dev_err(dev, "Initialization sequence timed out\n"); 3108 rc = -ETIMEDOUT; 3109 goto out; 3110 } 3111 3112 rc = init_sub_crqs(adapter); 3113 if (rc) { 3114 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3115 goto out; 3116 } 3117 3118 rc = init_sub_crq_irqs(adapter); 3119 if (rc) { 3120 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3121 goto init_failed; 3122 } 3123 3124 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3125 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3126 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3127 3128 adapter->state = VNIC_PROBED; 3129 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3130 3131 return 0; 3132 3133 init_failed: 3134 release_sub_crqs(adapter, 1); 3135 out: 3136 adapter->state = VNIC_DOWN; 3137 return rc; 3138 } 3139 3140 static void __ibmvnic_reset(struct work_struct *work) 3141 { 3142 struct ibmvnic_adapter *adapter; 3143 unsigned int timeout = 5000; 3144 struct ibmvnic_rwi *tmprwi; 3145 bool saved_state = false; 3146 struct ibmvnic_rwi *rwi; 3147 unsigned long flags; 3148 struct device *dev; 3149 bool need_reset; 3150 int num_fails = 0; 3151 u32 reset_state; 3152 int rc = 0; 3153 3154 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3155 dev = &adapter->vdev->dev; 3156 3157 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3158 * or if another reset is in progress, defer work for now. If probe 3159 * eventually fails it will flush and terminate our work. 3160 * 3161 * Three possibilities here: 3162 * 1. Adpater being removed - just return 3163 * 2. Timed out on probe or another reset in progress - delay the work 3164 * 3. Completed probe - perform any resets in queue 3165 */ 3166 if (adapter->state == VNIC_PROBING && 3167 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3168 dev_err(dev, "Reset thread timed out on probe"); 3169 queue_delayed_work(system_long_wq, 3170 &adapter->ibmvnic_delayed_reset, 3171 IBMVNIC_RESET_DELAY); 3172 return; 3173 } 3174 3175 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3176 if (adapter->state == VNIC_REMOVING) 3177 return; 3178 3179 /* ->rwi_list is stable now (no one else is removing entries) */ 3180 3181 /* ibmvnic_probe() may have purged the reset queue after we were 3182 * scheduled to process a reset so there maybe no resets to process. 3183 * Before setting the ->resetting bit though, we have to make sure 3184 * that there is infact a reset to process. Otherwise we may race 3185 * with ibmvnic_open() and end up leaving the vnic down: 3186 * 3187 * __ibmvnic_reset() ibmvnic_open() 3188 * ----------------- -------------- 3189 * 3190 * set ->resetting bit 3191 * find ->resetting bit is set 3192 * set ->state to IBMVNIC_OPEN (i.e 3193 * assume reset will open device) 3194 * return 3195 * find reset queue empty 3196 * return 3197 * 3198 * Neither performed vnic login/open and vnic stays down 3199 * 3200 * If we hold the lock and conditionally set the bit, either we 3201 * or ibmvnic_open() will complete the open. 3202 */ 3203 need_reset = false; 3204 spin_lock(&adapter->rwi_lock); 3205 if (!list_empty(&adapter->rwi_list)) { 3206 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3207 queue_delayed_work(system_long_wq, 3208 &adapter->ibmvnic_delayed_reset, 3209 IBMVNIC_RESET_DELAY); 3210 } else { 3211 need_reset = true; 3212 } 3213 } 3214 spin_unlock(&adapter->rwi_lock); 3215 3216 if (!need_reset) 3217 return; 3218 3219 rwi = get_next_rwi(adapter); 3220 while (rwi) { 3221 spin_lock_irqsave(&adapter->state_lock, flags); 3222 3223 if (adapter->state == VNIC_REMOVING || 3224 adapter->state == VNIC_REMOVED) { 3225 spin_unlock_irqrestore(&adapter->state_lock, flags); 3226 kfree(rwi); 3227 rc = EBUSY; 3228 break; 3229 } 3230 3231 if (!saved_state) { 3232 reset_state = adapter->state; 3233 saved_state = true; 3234 } 3235 spin_unlock_irqrestore(&adapter->state_lock, flags); 3236 3237 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3238 rtnl_lock(); 3239 rc = do_passive_init(adapter); 3240 rtnl_unlock(); 3241 if (!rc) 3242 netif_carrier_on(adapter->netdev); 3243 } else if (adapter->force_reset_recovery) { 3244 /* Since we are doing a hard reset now, clear the 3245 * failover_pending flag so we don't ignore any 3246 * future MOBILITY or other resets. 3247 */ 3248 adapter->failover_pending = false; 3249 3250 /* Transport event occurred during previous reset */ 3251 if (adapter->wait_for_reset) { 3252 /* Previous was CHANGE_PARAM; caller locked */ 3253 adapter->force_reset_recovery = false; 3254 rc = do_hard_reset(adapter, rwi, reset_state); 3255 } else { 3256 rtnl_lock(); 3257 adapter->force_reset_recovery = false; 3258 rc = do_hard_reset(adapter, rwi, reset_state); 3259 rtnl_unlock(); 3260 } 3261 if (rc) 3262 num_fails++; 3263 else 3264 num_fails = 0; 3265 3266 /* If auto-priority-failover is enabled we can get 3267 * back to back failovers during resets, resulting 3268 * in at least two failed resets (from high-priority 3269 * backing device to low-priority one and then back) 3270 * If resets continue to fail beyond that, give the 3271 * adapter some time to settle down before retrying. 3272 */ 3273 if (num_fails >= 3) { 3274 netdev_dbg(adapter->netdev, 3275 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3276 adapter_state_to_string(adapter->state), 3277 num_fails); 3278 set_current_state(TASK_UNINTERRUPTIBLE); 3279 schedule_timeout(60 * HZ); 3280 } 3281 } else { 3282 rc = do_reset(adapter, rwi, reset_state); 3283 } 3284 tmprwi = rwi; 3285 adapter->last_reset_time = jiffies; 3286 3287 if (rc) 3288 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3289 3290 rwi = get_next_rwi(adapter); 3291 3292 /* 3293 * If there are no resets queued and the previous reset failed, 3294 * the adapter would be in an undefined state. So retry the 3295 * previous reset as a hard reset. 3296 * 3297 * Else, free the previous rwi and, if there is another reset 3298 * queued, process the new reset even if previous reset failed 3299 * (the previous reset could have failed because of a fail 3300 * over for instance, so process the fail over). 3301 */ 3302 if (!rwi && rc) 3303 rwi = tmprwi; 3304 else 3305 kfree(tmprwi); 3306 3307 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3308 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3309 adapter->force_reset_recovery = true; 3310 } 3311 3312 if (adapter->wait_for_reset) { 3313 adapter->reset_done_rc = rc; 3314 complete(&adapter->reset_done); 3315 } 3316 3317 clear_bit_unlock(0, &adapter->resetting); 3318 3319 netdev_dbg(adapter->netdev, 3320 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3321 adapter_state_to_string(adapter->state), 3322 adapter->force_reset_recovery, 3323 adapter->wait_for_reset); 3324 } 3325 3326 static void __ibmvnic_delayed_reset(struct work_struct *work) 3327 { 3328 struct ibmvnic_adapter *adapter; 3329 3330 adapter = container_of(work, struct ibmvnic_adapter, 3331 ibmvnic_delayed_reset.work); 3332 __ibmvnic_reset(&adapter->ibmvnic_reset); 3333 } 3334 3335 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3336 { 3337 struct list_head *entry, *tmp_entry; 3338 3339 if (!list_empty(&adapter->rwi_list)) { 3340 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3341 list_del(entry); 3342 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3343 } 3344 } 3345 } 3346 3347 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3348 enum ibmvnic_reset_reason reason) 3349 { 3350 struct net_device *netdev = adapter->netdev; 3351 struct ibmvnic_rwi *rwi, *tmp; 3352 unsigned long flags; 3353 int ret; 3354 3355 spin_lock_irqsave(&adapter->rwi_lock, flags); 3356 3357 /* If failover is pending don't schedule any other reset. 3358 * Instead let the failover complete. If there is already a 3359 * a failover reset scheduled, we will detect and drop the 3360 * duplicate reset when walking the ->rwi_list below. 3361 */ 3362 if (adapter->state == VNIC_REMOVING || 3363 adapter->state == VNIC_REMOVED || 3364 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3365 ret = EBUSY; 3366 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3367 goto err; 3368 } 3369 3370 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3371 if (tmp->reset_reason == reason) { 3372 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3373 reset_reason_to_string(reason)); 3374 ret = EBUSY; 3375 goto err; 3376 } 3377 } 3378 3379 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3380 if (!rwi) { 3381 ret = ENOMEM; 3382 goto err; 3383 } 3384 /* if we just received a transport event, 3385 * flush reset queue and process this reset 3386 */ 3387 if (adapter->force_reset_recovery) 3388 flush_reset_queue(adapter); 3389 3390 rwi->reset_reason = reason; 3391 list_add_tail(&rwi->list, &adapter->rwi_list); 3392 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3393 reset_reason_to_string(reason)); 3394 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3395 3396 ret = 0; 3397 err: 3398 /* ibmvnic_close() below can block, so drop the lock first */ 3399 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3400 3401 if (ret == ENOMEM) 3402 ibmvnic_close(netdev); 3403 3404 return -ret; 3405 } 3406 3407 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3408 { 3409 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3410 3411 if (test_bit(0, &adapter->resetting)) { 3412 netdev_err(adapter->netdev, 3413 "Adapter is resetting, skip timeout reset\n"); 3414 return; 3415 } 3416 /* No queuing up reset until at least 5 seconds (default watchdog val) 3417 * after last reset 3418 */ 3419 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3420 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3421 return; 3422 } 3423 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3424 } 3425 3426 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3427 struct ibmvnic_rx_buff *rx_buff) 3428 { 3429 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3430 3431 rx_buff->skb = NULL; 3432 3433 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3434 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3435 3436 atomic_dec(&pool->available); 3437 } 3438 3439 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3440 { 3441 struct ibmvnic_sub_crq_queue *rx_scrq; 3442 struct ibmvnic_adapter *adapter; 3443 struct net_device *netdev; 3444 int frames_processed; 3445 int scrq_num; 3446 3447 netdev = napi->dev; 3448 adapter = netdev_priv(netdev); 3449 scrq_num = (int)(napi - adapter->napi); 3450 frames_processed = 0; 3451 rx_scrq = adapter->rx_scrq[scrq_num]; 3452 3453 restart_poll: 3454 while (frames_processed < budget) { 3455 struct sk_buff *skb; 3456 struct ibmvnic_rx_buff *rx_buff; 3457 union sub_crq *next; 3458 u32 length; 3459 u16 offset; 3460 u8 flags = 0; 3461 3462 if (unlikely(test_bit(0, &adapter->resetting) && 3463 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3464 enable_scrq_irq(adapter, rx_scrq); 3465 napi_complete_done(napi, frames_processed); 3466 return frames_processed; 3467 } 3468 3469 if (!pending_scrq(adapter, rx_scrq)) 3470 break; 3471 next = ibmvnic_next_scrq(adapter, rx_scrq); 3472 rx_buff = (struct ibmvnic_rx_buff *) 3473 be64_to_cpu(next->rx_comp.correlator); 3474 /* do error checking */ 3475 if (next->rx_comp.rc) { 3476 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3477 be16_to_cpu(next->rx_comp.rc)); 3478 /* free the entry */ 3479 next->rx_comp.first = 0; 3480 dev_kfree_skb_any(rx_buff->skb); 3481 remove_buff_from_pool(adapter, rx_buff); 3482 continue; 3483 } else if (!rx_buff->skb) { 3484 /* free the entry */ 3485 next->rx_comp.first = 0; 3486 remove_buff_from_pool(adapter, rx_buff); 3487 continue; 3488 } 3489 3490 length = be32_to_cpu(next->rx_comp.len); 3491 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3492 flags = next->rx_comp.flags; 3493 skb = rx_buff->skb; 3494 /* load long_term_buff before copying to skb */ 3495 dma_rmb(); 3496 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3497 length); 3498 3499 /* VLAN Header has been stripped by the system firmware and 3500 * needs to be inserted by the driver 3501 */ 3502 if (adapter->rx_vlan_header_insertion && 3503 (flags & IBMVNIC_VLAN_STRIPPED)) 3504 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3505 ntohs(next->rx_comp.vlan_tci)); 3506 3507 /* free the entry */ 3508 next->rx_comp.first = 0; 3509 remove_buff_from_pool(adapter, rx_buff); 3510 3511 skb_put(skb, length); 3512 skb->protocol = eth_type_trans(skb, netdev); 3513 skb_record_rx_queue(skb, scrq_num); 3514 3515 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3516 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3517 skb->ip_summed = CHECKSUM_UNNECESSARY; 3518 } 3519 3520 length = skb->len; 3521 napi_gro_receive(napi, skb); /* send it up */ 3522 netdev->stats.rx_packets++; 3523 netdev->stats.rx_bytes += length; 3524 adapter->rx_stats_buffers[scrq_num].packets++; 3525 adapter->rx_stats_buffers[scrq_num].bytes += length; 3526 frames_processed++; 3527 } 3528 3529 if (adapter->state != VNIC_CLOSING && 3530 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 3531 adapter->req_rx_add_entries_per_subcrq / 2) || 3532 frames_processed < budget)) 3533 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3534 if (frames_processed < budget) { 3535 if (napi_complete_done(napi, frames_processed)) { 3536 enable_scrq_irq(adapter, rx_scrq); 3537 if (pending_scrq(adapter, rx_scrq)) { 3538 if (napi_schedule(napi)) { 3539 disable_scrq_irq(adapter, rx_scrq); 3540 goto restart_poll; 3541 } 3542 } 3543 } 3544 } 3545 return frames_processed; 3546 } 3547 3548 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3549 { 3550 int rc, ret; 3551 3552 adapter->fallback.mtu = adapter->req_mtu; 3553 adapter->fallback.rx_queues = adapter->req_rx_queues; 3554 adapter->fallback.tx_queues = adapter->req_tx_queues; 3555 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3556 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3557 3558 reinit_completion(&adapter->reset_done); 3559 adapter->wait_for_reset = true; 3560 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3561 3562 if (rc) { 3563 ret = rc; 3564 goto out; 3565 } 3566 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3567 if (rc) { 3568 ret = -ENODEV; 3569 goto out; 3570 } 3571 3572 ret = 0; 3573 if (adapter->reset_done_rc) { 3574 ret = -EIO; 3575 adapter->desired.mtu = adapter->fallback.mtu; 3576 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3577 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3578 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3579 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3580 3581 reinit_completion(&adapter->reset_done); 3582 adapter->wait_for_reset = true; 3583 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3584 if (rc) { 3585 ret = rc; 3586 goto out; 3587 } 3588 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3589 60000); 3590 if (rc) { 3591 ret = -ENODEV; 3592 goto out; 3593 } 3594 } 3595 out: 3596 adapter->wait_for_reset = false; 3597 3598 return ret; 3599 } 3600 3601 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3602 { 3603 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3604 3605 adapter->desired.mtu = new_mtu + ETH_HLEN; 3606 3607 return wait_for_reset(adapter); 3608 } 3609 3610 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3611 struct net_device *dev, 3612 netdev_features_t features) 3613 { 3614 /* Some backing hardware adapters can not 3615 * handle packets with a MSS less than 224 3616 * or with only one segment. 3617 */ 3618 if (skb_is_gso(skb)) { 3619 if (skb_shinfo(skb)->gso_size < 224 || 3620 skb_shinfo(skb)->gso_segs == 1) 3621 features &= ~NETIF_F_GSO_MASK; 3622 } 3623 3624 return features; 3625 } 3626 3627 static const struct net_device_ops ibmvnic_netdev_ops = { 3628 .ndo_open = ibmvnic_open, 3629 .ndo_stop = ibmvnic_close, 3630 .ndo_start_xmit = ibmvnic_xmit, 3631 .ndo_set_rx_mode = ibmvnic_set_multi, 3632 .ndo_set_mac_address = ibmvnic_set_mac, 3633 .ndo_validate_addr = eth_validate_addr, 3634 .ndo_tx_timeout = ibmvnic_tx_timeout, 3635 .ndo_change_mtu = ibmvnic_change_mtu, 3636 .ndo_features_check = ibmvnic_features_check, 3637 }; 3638 3639 /* ethtool functions */ 3640 3641 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3642 struct ethtool_link_ksettings *cmd) 3643 { 3644 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3645 int rc; 3646 3647 rc = send_query_phys_parms(adapter); 3648 if (rc) { 3649 adapter->speed = SPEED_UNKNOWN; 3650 adapter->duplex = DUPLEX_UNKNOWN; 3651 } 3652 cmd->base.speed = adapter->speed; 3653 cmd->base.duplex = adapter->duplex; 3654 cmd->base.port = PORT_FIBRE; 3655 cmd->base.phy_address = 0; 3656 cmd->base.autoneg = AUTONEG_ENABLE; 3657 3658 return 0; 3659 } 3660 3661 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3662 struct ethtool_drvinfo *info) 3663 { 3664 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3665 3666 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3667 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3668 strscpy(info->fw_version, adapter->fw_version, 3669 sizeof(info->fw_version)); 3670 } 3671 3672 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3673 { 3674 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3675 3676 return adapter->msg_enable; 3677 } 3678 3679 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3680 { 3681 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3682 3683 adapter->msg_enable = data; 3684 } 3685 3686 static u32 ibmvnic_get_link(struct net_device *netdev) 3687 { 3688 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3689 3690 /* Don't need to send a query because we request a logical link up at 3691 * init and then we wait for link state indications 3692 */ 3693 return adapter->logical_link_state; 3694 } 3695 3696 static void ibmvnic_get_ringparam(struct net_device *netdev, 3697 struct ethtool_ringparam *ring, 3698 struct kernel_ethtool_ringparam *kernel_ring, 3699 struct netlink_ext_ack *extack) 3700 { 3701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3702 3703 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3704 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3705 ring->rx_mini_max_pending = 0; 3706 ring->rx_jumbo_max_pending = 0; 3707 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3708 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3709 ring->rx_mini_pending = 0; 3710 ring->rx_jumbo_pending = 0; 3711 } 3712 3713 static int ibmvnic_set_ringparam(struct net_device *netdev, 3714 struct ethtool_ringparam *ring, 3715 struct kernel_ethtool_ringparam *kernel_ring, 3716 struct netlink_ext_ack *extack) 3717 { 3718 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3719 3720 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3721 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3722 netdev_err(netdev, "Invalid request.\n"); 3723 netdev_err(netdev, "Max tx buffers = %llu\n", 3724 adapter->max_rx_add_entries_per_subcrq); 3725 netdev_err(netdev, "Max rx buffers = %llu\n", 3726 adapter->max_tx_entries_per_subcrq); 3727 return -EINVAL; 3728 } 3729 3730 adapter->desired.rx_entries = ring->rx_pending; 3731 adapter->desired.tx_entries = ring->tx_pending; 3732 3733 return wait_for_reset(adapter); 3734 } 3735 3736 static void ibmvnic_get_channels(struct net_device *netdev, 3737 struct ethtool_channels *channels) 3738 { 3739 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3740 3741 channels->max_rx = adapter->max_rx_queues; 3742 channels->max_tx = adapter->max_tx_queues; 3743 channels->max_other = 0; 3744 channels->max_combined = 0; 3745 channels->rx_count = adapter->req_rx_queues; 3746 channels->tx_count = adapter->req_tx_queues; 3747 channels->other_count = 0; 3748 channels->combined_count = 0; 3749 } 3750 3751 static int ibmvnic_set_channels(struct net_device *netdev, 3752 struct ethtool_channels *channels) 3753 { 3754 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3755 3756 adapter->desired.rx_queues = channels->rx_count; 3757 adapter->desired.tx_queues = channels->tx_count; 3758 3759 return wait_for_reset(adapter); 3760 } 3761 3762 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3763 { 3764 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3765 int i; 3766 3767 if (stringset != ETH_SS_STATS) 3768 return; 3769 3770 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 3771 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3772 3773 for (i = 0; i < adapter->req_tx_queues; i++) { 3774 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3775 data += ETH_GSTRING_LEN; 3776 3777 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3778 data += ETH_GSTRING_LEN; 3779 3780 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 3781 data += ETH_GSTRING_LEN; 3782 } 3783 3784 for (i = 0; i < adapter->req_rx_queues; i++) { 3785 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3786 data += ETH_GSTRING_LEN; 3787 3788 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3789 data += ETH_GSTRING_LEN; 3790 3791 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3792 data += ETH_GSTRING_LEN; 3793 } 3794 } 3795 3796 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3797 { 3798 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3799 3800 switch (sset) { 3801 case ETH_SS_STATS: 3802 return ARRAY_SIZE(ibmvnic_stats) + 3803 adapter->req_tx_queues * NUM_TX_STATS + 3804 adapter->req_rx_queues * NUM_RX_STATS; 3805 default: 3806 return -EOPNOTSUPP; 3807 } 3808 } 3809 3810 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3811 struct ethtool_stats *stats, u64 *data) 3812 { 3813 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3814 union ibmvnic_crq crq; 3815 int i, j; 3816 int rc; 3817 3818 memset(&crq, 0, sizeof(crq)); 3819 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3820 crq.request_statistics.cmd = REQUEST_STATISTICS; 3821 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3822 crq.request_statistics.len = 3823 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3824 3825 /* Wait for data to be written */ 3826 reinit_completion(&adapter->stats_done); 3827 rc = ibmvnic_send_crq(adapter, &crq); 3828 if (rc) 3829 return; 3830 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3831 if (rc) 3832 return; 3833 3834 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3835 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3836 (adapter, ibmvnic_stats[i].offset)); 3837 3838 for (j = 0; j < adapter->req_tx_queues; j++) { 3839 data[i] = adapter->tx_stats_buffers[j].packets; 3840 i++; 3841 data[i] = adapter->tx_stats_buffers[j].bytes; 3842 i++; 3843 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3844 i++; 3845 } 3846 3847 for (j = 0; j < adapter->req_rx_queues; j++) { 3848 data[i] = adapter->rx_stats_buffers[j].packets; 3849 i++; 3850 data[i] = adapter->rx_stats_buffers[j].bytes; 3851 i++; 3852 data[i] = adapter->rx_stats_buffers[j].interrupts; 3853 i++; 3854 } 3855 } 3856 3857 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3858 .get_drvinfo = ibmvnic_get_drvinfo, 3859 .get_msglevel = ibmvnic_get_msglevel, 3860 .set_msglevel = ibmvnic_set_msglevel, 3861 .get_link = ibmvnic_get_link, 3862 .get_ringparam = ibmvnic_get_ringparam, 3863 .set_ringparam = ibmvnic_set_ringparam, 3864 .get_channels = ibmvnic_get_channels, 3865 .set_channels = ibmvnic_set_channels, 3866 .get_strings = ibmvnic_get_strings, 3867 .get_sset_count = ibmvnic_get_sset_count, 3868 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3869 .get_link_ksettings = ibmvnic_get_link_ksettings, 3870 }; 3871 3872 /* Routines for managing CRQs/sCRQs */ 3873 3874 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3875 struct ibmvnic_sub_crq_queue *scrq) 3876 { 3877 int rc; 3878 3879 if (!scrq) { 3880 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3881 return -EINVAL; 3882 } 3883 3884 if (scrq->irq) { 3885 free_irq(scrq->irq, scrq); 3886 irq_dispose_mapping(scrq->irq); 3887 scrq->irq = 0; 3888 } 3889 3890 if (scrq->msgs) { 3891 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3892 atomic_set(&scrq->used, 0); 3893 scrq->cur = 0; 3894 scrq->ind_buf.index = 0; 3895 } else { 3896 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3897 return -EINVAL; 3898 } 3899 3900 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3901 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3902 return rc; 3903 } 3904 3905 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3906 { 3907 int i, rc; 3908 3909 if (!adapter->tx_scrq || !adapter->rx_scrq) 3910 return -EINVAL; 3911 3912 ibmvnic_clean_affinity(adapter); 3913 3914 for (i = 0; i < adapter->req_tx_queues; i++) { 3915 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3916 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3917 if (rc) 3918 return rc; 3919 } 3920 3921 for (i = 0; i < adapter->req_rx_queues; i++) { 3922 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3923 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3924 if (rc) 3925 return rc; 3926 } 3927 3928 return rc; 3929 } 3930 3931 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3932 struct ibmvnic_sub_crq_queue *scrq, 3933 bool do_h_free) 3934 { 3935 struct device *dev = &adapter->vdev->dev; 3936 long rc; 3937 3938 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3939 3940 if (do_h_free) { 3941 /* Close the sub-crqs */ 3942 do { 3943 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3944 adapter->vdev->unit_address, 3945 scrq->crq_num); 3946 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3947 3948 if (rc) { 3949 netdev_err(adapter->netdev, 3950 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3951 scrq->crq_num, rc); 3952 } 3953 } 3954 3955 dma_free_coherent(dev, 3956 IBMVNIC_IND_ARR_SZ, 3957 scrq->ind_buf.indir_arr, 3958 scrq->ind_buf.indir_dma); 3959 3960 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3961 DMA_BIDIRECTIONAL); 3962 free_pages((unsigned long)scrq->msgs, 2); 3963 free_cpumask_var(scrq->affinity_mask); 3964 kfree(scrq); 3965 } 3966 3967 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3968 *adapter) 3969 { 3970 struct device *dev = &adapter->vdev->dev; 3971 struct ibmvnic_sub_crq_queue *scrq; 3972 int rc; 3973 3974 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3975 if (!scrq) 3976 return NULL; 3977 3978 scrq->msgs = 3979 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3980 if (!scrq->msgs) { 3981 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3982 goto zero_page_failed; 3983 } 3984 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 3985 goto cpumask_alloc_failed; 3986 3987 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3988 DMA_BIDIRECTIONAL); 3989 if (dma_mapping_error(dev, scrq->msg_token)) { 3990 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3991 goto map_failed; 3992 } 3993 3994 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3995 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3996 3997 if (rc == H_RESOURCE) 3998 rc = ibmvnic_reset_crq(adapter); 3999 4000 if (rc == H_CLOSED) { 4001 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 4002 } else if (rc) { 4003 dev_warn(dev, "Error %d registering sub-crq\n", rc); 4004 goto reg_failed; 4005 } 4006 4007 scrq->adapter = adapter; 4008 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 4009 scrq->ind_buf.index = 0; 4010 4011 scrq->ind_buf.indir_arr = 4012 dma_alloc_coherent(dev, 4013 IBMVNIC_IND_ARR_SZ, 4014 &scrq->ind_buf.indir_dma, 4015 GFP_KERNEL); 4016 4017 if (!scrq->ind_buf.indir_arr) 4018 goto indir_failed; 4019 4020 spin_lock_init(&scrq->lock); 4021 4022 netdev_dbg(adapter->netdev, 4023 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4024 scrq->crq_num, scrq->hw_irq, scrq->irq); 4025 4026 return scrq; 4027 4028 indir_failed: 4029 do { 4030 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4031 adapter->vdev->unit_address, 4032 scrq->crq_num); 4033 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4034 reg_failed: 4035 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4036 DMA_BIDIRECTIONAL); 4037 map_failed: 4038 free_cpumask_var(scrq->affinity_mask); 4039 cpumask_alloc_failed: 4040 free_pages((unsigned long)scrq->msgs, 2); 4041 zero_page_failed: 4042 kfree(scrq); 4043 4044 return NULL; 4045 } 4046 4047 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4048 { 4049 int i; 4050 4051 ibmvnic_clean_affinity(adapter); 4052 if (adapter->tx_scrq) { 4053 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4054 if (!adapter->tx_scrq[i]) 4055 continue; 4056 4057 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4058 i); 4059 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4060 if (adapter->tx_scrq[i]->irq) { 4061 free_irq(adapter->tx_scrq[i]->irq, 4062 adapter->tx_scrq[i]); 4063 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4064 adapter->tx_scrq[i]->irq = 0; 4065 } 4066 4067 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4068 do_h_free); 4069 } 4070 4071 kfree(adapter->tx_scrq); 4072 adapter->tx_scrq = NULL; 4073 adapter->num_active_tx_scrqs = 0; 4074 } 4075 4076 /* Clean any remaining outstanding SKBs 4077 * we freed the irq so we won't be hearing 4078 * from them 4079 */ 4080 clean_tx_pools(adapter); 4081 4082 if (adapter->rx_scrq) { 4083 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4084 if (!adapter->rx_scrq[i]) 4085 continue; 4086 4087 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4088 i); 4089 if (adapter->rx_scrq[i]->irq) { 4090 free_irq(adapter->rx_scrq[i]->irq, 4091 adapter->rx_scrq[i]); 4092 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4093 adapter->rx_scrq[i]->irq = 0; 4094 } 4095 4096 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4097 do_h_free); 4098 } 4099 4100 kfree(adapter->rx_scrq); 4101 adapter->rx_scrq = NULL; 4102 adapter->num_active_rx_scrqs = 0; 4103 } 4104 } 4105 4106 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4107 struct ibmvnic_sub_crq_queue *scrq) 4108 { 4109 struct device *dev = &adapter->vdev->dev; 4110 unsigned long rc; 4111 4112 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4113 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4114 if (rc) 4115 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4116 scrq->hw_irq, rc); 4117 return rc; 4118 } 4119 4120 /* We can not use the IRQ chip EOI handler because that has the 4121 * unintended effect of changing the interrupt priority. 4122 */ 4123 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4124 { 4125 u64 val = 0xff000000 | scrq->hw_irq; 4126 unsigned long rc; 4127 4128 rc = plpar_hcall_norets(H_EOI, val); 4129 if (rc) 4130 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4131 } 4132 4133 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4134 * transmit or receive queue just prior to a partition migration. 4135 * Force an EOI after migration. 4136 */ 4137 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4138 struct ibmvnic_sub_crq_queue *scrq) 4139 { 4140 if (!xive_enabled()) 4141 ibmvnic_xics_eoi(dev, scrq); 4142 } 4143 4144 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4145 struct ibmvnic_sub_crq_queue *scrq) 4146 { 4147 struct device *dev = &adapter->vdev->dev; 4148 unsigned long rc; 4149 4150 if (scrq->hw_irq > 0x100000000ULL) { 4151 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4152 return 1; 4153 } 4154 4155 if (test_bit(0, &adapter->resetting) && 4156 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4157 ibmvnic_clear_pending_interrupt(dev, scrq); 4158 } 4159 4160 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4161 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4162 if (rc) 4163 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4164 scrq->hw_irq, rc); 4165 return rc; 4166 } 4167 4168 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4169 struct ibmvnic_sub_crq_queue *scrq) 4170 { 4171 struct device *dev = &adapter->vdev->dev; 4172 struct ibmvnic_tx_pool *tx_pool; 4173 struct ibmvnic_tx_buff *txbuff; 4174 struct netdev_queue *txq; 4175 union sub_crq *next; 4176 int index; 4177 int i; 4178 4179 restart_loop: 4180 while (pending_scrq(adapter, scrq)) { 4181 unsigned int pool = scrq->pool_index; 4182 int num_entries = 0; 4183 int total_bytes = 0; 4184 int num_packets = 0; 4185 4186 next = ibmvnic_next_scrq(adapter, scrq); 4187 for (i = 0; i < next->tx_comp.num_comps; i++) { 4188 index = be32_to_cpu(next->tx_comp.correlators[i]); 4189 if (index & IBMVNIC_TSO_POOL_MASK) { 4190 tx_pool = &adapter->tso_pool[pool]; 4191 index &= ~IBMVNIC_TSO_POOL_MASK; 4192 } else { 4193 tx_pool = &adapter->tx_pool[pool]; 4194 } 4195 4196 txbuff = &tx_pool->tx_buff[index]; 4197 num_packets++; 4198 num_entries += txbuff->num_entries; 4199 if (txbuff->skb) { 4200 total_bytes += txbuff->skb->len; 4201 if (next->tx_comp.rcs[i]) { 4202 dev_err(dev, "tx error %x\n", 4203 next->tx_comp.rcs[i]); 4204 dev_kfree_skb_irq(txbuff->skb); 4205 } else { 4206 dev_consume_skb_irq(txbuff->skb); 4207 } 4208 txbuff->skb = NULL; 4209 } else { 4210 netdev_warn(adapter->netdev, 4211 "TX completion received with NULL socket buffer\n"); 4212 } 4213 tx_pool->free_map[tx_pool->producer_index] = index; 4214 tx_pool->producer_index = 4215 (tx_pool->producer_index + 1) % 4216 tx_pool->num_buffers; 4217 } 4218 /* remove tx_comp scrq*/ 4219 next->tx_comp.first = 0; 4220 4221 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4222 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4223 4224 if (atomic_sub_return(num_entries, &scrq->used) <= 4225 (adapter->req_tx_entries_per_subcrq / 2) && 4226 __netif_subqueue_stopped(adapter->netdev, 4227 scrq->pool_index)) { 4228 rcu_read_lock(); 4229 if (adapter->tx_queues_active) { 4230 netif_wake_subqueue(adapter->netdev, 4231 scrq->pool_index); 4232 netdev_dbg(adapter->netdev, 4233 "Started queue %d\n", 4234 scrq->pool_index); 4235 } 4236 rcu_read_unlock(); 4237 } 4238 } 4239 4240 enable_scrq_irq(adapter, scrq); 4241 4242 if (pending_scrq(adapter, scrq)) { 4243 disable_scrq_irq(adapter, scrq); 4244 goto restart_loop; 4245 } 4246 4247 return 0; 4248 } 4249 4250 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4251 { 4252 struct ibmvnic_sub_crq_queue *scrq = instance; 4253 struct ibmvnic_adapter *adapter = scrq->adapter; 4254 4255 disable_scrq_irq(adapter, scrq); 4256 ibmvnic_complete_tx(adapter, scrq); 4257 4258 return IRQ_HANDLED; 4259 } 4260 4261 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4262 { 4263 struct ibmvnic_sub_crq_queue *scrq = instance; 4264 struct ibmvnic_adapter *adapter = scrq->adapter; 4265 4266 /* When booting a kdump kernel we can hit pending interrupts 4267 * prior to completing driver initialization. 4268 */ 4269 if (unlikely(adapter->state != VNIC_OPEN)) 4270 return IRQ_NONE; 4271 4272 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4273 4274 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4275 disable_scrq_irq(adapter, scrq); 4276 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4277 } 4278 4279 return IRQ_HANDLED; 4280 } 4281 4282 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4283 { 4284 struct device *dev = &adapter->vdev->dev; 4285 struct ibmvnic_sub_crq_queue *scrq; 4286 int i = 0, j = 0; 4287 int rc = 0; 4288 4289 for (i = 0; i < adapter->req_tx_queues; i++) { 4290 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4291 i); 4292 scrq = adapter->tx_scrq[i]; 4293 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4294 4295 if (!scrq->irq) { 4296 rc = -EINVAL; 4297 dev_err(dev, "Error mapping irq\n"); 4298 goto req_tx_irq_failed; 4299 } 4300 4301 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4302 adapter->vdev->unit_address, i); 4303 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4304 0, scrq->name, scrq); 4305 4306 if (rc) { 4307 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4308 scrq->irq, rc); 4309 irq_dispose_mapping(scrq->irq); 4310 goto req_tx_irq_failed; 4311 } 4312 } 4313 4314 for (i = 0; i < adapter->req_rx_queues; i++) { 4315 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4316 i); 4317 scrq = adapter->rx_scrq[i]; 4318 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4319 if (!scrq->irq) { 4320 rc = -EINVAL; 4321 dev_err(dev, "Error mapping irq\n"); 4322 goto req_rx_irq_failed; 4323 } 4324 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4325 adapter->vdev->unit_address, i); 4326 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4327 0, scrq->name, scrq); 4328 if (rc) { 4329 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4330 scrq->irq, rc); 4331 irq_dispose_mapping(scrq->irq); 4332 goto req_rx_irq_failed; 4333 } 4334 } 4335 4336 cpus_read_lock(); 4337 ibmvnic_set_affinity(adapter); 4338 cpus_read_unlock(); 4339 4340 return rc; 4341 4342 req_rx_irq_failed: 4343 for (j = 0; j < i; j++) { 4344 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4345 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4346 } 4347 i = adapter->req_tx_queues; 4348 req_tx_irq_failed: 4349 for (j = 0; j < i; j++) { 4350 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4351 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4352 } 4353 release_sub_crqs(adapter, 1); 4354 return rc; 4355 } 4356 4357 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4358 { 4359 struct device *dev = &adapter->vdev->dev; 4360 struct ibmvnic_sub_crq_queue **allqueues; 4361 int registered_queues = 0; 4362 int total_queues; 4363 int more = 0; 4364 int i; 4365 4366 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4367 4368 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4369 if (!allqueues) 4370 return -ENOMEM; 4371 4372 for (i = 0; i < total_queues; i++) { 4373 allqueues[i] = init_sub_crq_queue(adapter); 4374 if (!allqueues[i]) { 4375 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4376 break; 4377 } 4378 registered_queues++; 4379 } 4380 4381 /* Make sure we were able to register the minimum number of queues */ 4382 if (registered_queues < 4383 adapter->min_tx_queues + adapter->min_rx_queues) { 4384 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4385 goto tx_failed; 4386 } 4387 4388 /* Distribute the failed allocated queues*/ 4389 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4390 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4391 switch (i % 3) { 4392 case 0: 4393 if (adapter->req_rx_queues > adapter->min_rx_queues) 4394 adapter->req_rx_queues--; 4395 else 4396 more++; 4397 break; 4398 case 1: 4399 if (adapter->req_tx_queues > adapter->min_tx_queues) 4400 adapter->req_tx_queues--; 4401 else 4402 more++; 4403 break; 4404 } 4405 } 4406 4407 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4408 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4409 if (!adapter->tx_scrq) 4410 goto tx_failed; 4411 4412 for (i = 0; i < adapter->req_tx_queues; i++) { 4413 adapter->tx_scrq[i] = allqueues[i]; 4414 adapter->tx_scrq[i]->pool_index = i; 4415 adapter->num_active_tx_scrqs++; 4416 } 4417 4418 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4419 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4420 if (!adapter->rx_scrq) 4421 goto rx_failed; 4422 4423 for (i = 0; i < adapter->req_rx_queues; i++) { 4424 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4425 adapter->rx_scrq[i]->scrq_num = i; 4426 adapter->num_active_rx_scrqs++; 4427 } 4428 4429 kfree(allqueues); 4430 return 0; 4431 4432 rx_failed: 4433 kfree(adapter->tx_scrq); 4434 adapter->tx_scrq = NULL; 4435 tx_failed: 4436 for (i = 0; i < registered_queues; i++) 4437 release_sub_crq_queue(adapter, allqueues[i], 1); 4438 kfree(allqueues); 4439 return -ENOMEM; 4440 } 4441 4442 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4443 { 4444 struct device *dev = &adapter->vdev->dev; 4445 union ibmvnic_crq crq; 4446 int max_entries; 4447 int cap_reqs; 4448 4449 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4450 * the PROMISC flag). Initialize this count upfront. When the tasklet 4451 * receives a response to all of these, it will send the next protocol 4452 * message (QUERY_IP_OFFLOAD). 4453 */ 4454 if (!(adapter->netdev->flags & IFF_PROMISC) || 4455 adapter->promisc_supported) 4456 cap_reqs = 7; 4457 else 4458 cap_reqs = 6; 4459 4460 if (!retry) { 4461 /* Sub-CRQ entries are 32 byte long */ 4462 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4463 4464 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4465 4466 if (adapter->min_tx_entries_per_subcrq > entries_page || 4467 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4468 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4469 return; 4470 } 4471 4472 if (adapter->desired.mtu) 4473 adapter->req_mtu = adapter->desired.mtu; 4474 else 4475 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4476 4477 if (!adapter->desired.tx_entries) 4478 adapter->desired.tx_entries = 4479 adapter->max_tx_entries_per_subcrq; 4480 if (!adapter->desired.rx_entries) 4481 adapter->desired.rx_entries = 4482 adapter->max_rx_add_entries_per_subcrq; 4483 4484 max_entries = IBMVNIC_LTB_SET_SIZE / 4485 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4486 4487 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4488 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4489 adapter->desired.tx_entries = max_entries; 4490 } 4491 4492 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4493 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4494 adapter->desired.rx_entries = max_entries; 4495 } 4496 4497 if (adapter->desired.tx_entries) 4498 adapter->req_tx_entries_per_subcrq = 4499 adapter->desired.tx_entries; 4500 else 4501 adapter->req_tx_entries_per_subcrq = 4502 adapter->max_tx_entries_per_subcrq; 4503 4504 if (adapter->desired.rx_entries) 4505 adapter->req_rx_add_entries_per_subcrq = 4506 adapter->desired.rx_entries; 4507 else 4508 adapter->req_rx_add_entries_per_subcrq = 4509 adapter->max_rx_add_entries_per_subcrq; 4510 4511 if (adapter->desired.tx_queues) 4512 adapter->req_tx_queues = 4513 adapter->desired.tx_queues; 4514 else 4515 adapter->req_tx_queues = 4516 adapter->opt_tx_comp_sub_queues; 4517 4518 if (adapter->desired.rx_queues) 4519 adapter->req_rx_queues = 4520 adapter->desired.rx_queues; 4521 else 4522 adapter->req_rx_queues = 4523 adapter->opt_rx_comp_queues; 4524 4525 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4526 } else { 4527 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4528 } 4529 memset(&crq, 0, sizeof(crq)); 4530 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4531 crq.request_capability.cmd = REQUEST_CAPABILITY; 4532 4533 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4534 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4535 cap_reqs--; 4536 ibmvnic_send_crq(adapter, &crq); 4537 4538 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4539 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4540 cap_reqs--; 4541 ibmvnic_send_crq(adapter, &crq); 4542 4543 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4544 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4545 cap_reqs--; 4546 ibmvnic_send_crq(adapter, &crq); 4547 4548 crq.request_capability.capability = 4549 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4550 crq.request_capability.number = 4551 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4552 cap_reqs--; 4553 ibmvnic_send_crq(adapter, &crq); 4554 4555 crq.request_capability.capability = 4556 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4557 crq.request_capability.number = 4558 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4559 cap_reqs--; 4560 ibmvnic_send_crq(adapter, &crq); 4561 4562 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4563 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4564 cap_reqs--; 4565 ibmvnic_send_crq(adapter, &crq); 4566 4567 if (adapter->netdev->flags & IFF_PROMISC) { 4568 if (adapter->promisc_supported) { 4569 crq.request_capability.capability = 4570 cpu_to_be16(PROMISC_REQUESTED); 4571 crq.request_capability.number = cpu_to_be64(1); 4572 cap_reqs--; 4573 ibmvnic_send_crq(adapter, &crq); 4574 } 4575 } else { 4576 crq.request_capability.capability = 4577 cpu_to_be16(PROMISC_REQUESTED); 4578 crq.request_capability.number = cpu_to_be64(0); 4579 cap_reqs--; 4580 ibmvnic_send_crq(adapter, &crq); 4581 } 4582 4583 /* Keep at end to catch any discrepancy between expected and actual 4584 * CRQs sent. 4585 */ 4586 WARN_ON(cap_reqs != 0); 4587 } 4588 4589 static int pending_scrq(struct ibmvnic_adapter *adapter, 4590 struct ibmvnic_sub_crq_queue *scrq) 4591 { 4592 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4593 int rc; 4594 4595 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4596 4597 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4598 * contents of the SCRQ descriptor 4599 */ 4600 dma_rmb(); 4601 4602 return rc; 4603 } 4604 4605 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4606 struct ibmvnic_sub_crq_queue *scrq) 4607 { 4608 union sub_crq *entry; 4609 unsigned long flags; 4610 4611 spin_lock_irqsave(&scrq->lock, flags); 4612 entry = &scrq->msgs[scrq->cur]; 4613 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4614 if (++scrq->cur == scrq->size) 4615 scrq->cur = 0; 4616 } else { 4617 entry = NULL; 4618 } 4619 spin_unlock_irqrestore(&scrq->lock, flags); 4620 4621 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4622 * contents of the SCRQ descriptor 4623 */ 4624 dma_rmb(); 4625 4626 return entry; 4627 } 4628 4629 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4630 { 4631 struct ibmvnic_crq_queue *queue = &adapter->crq; 4632 union ibmvnic_crq *crq; 4633 4634 crq = &queue->msgs[queue->cur]; 4635 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4636 if (++queue->cur == queue->size) 4637 queue->cur = 0; 4638 } else { 4639 crq = NULL; 4640 } 4641 4642 return crq; 4643 } 4644 4645 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4646 { 4647 switch (rc) { 4648 case H_PARAMETER: 4649 dev_warn_ratelimited(dev, 4650 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4651 func, rc); 4652 break; 4653 case H_CLOSED: 4654 dev_warn_ratelimited(dev, 4655 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4656 func, rc); 4657 break; 4658 default: 4659 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4660 break; 4661 } 4662 } 4663 4664 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4665 u64 remote_handle, u64 ioba, u64 num_entries) 4666 { 4667 unsigned int ua = adapter->vdev->unit_address; 4668 struct device *dev = &adapter->vdev->dev; 4669 int rc; 4670 4671 /* Make sure the hypervisor sees the complete request */ 4672 dma_wmb(); 4673 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4674 cpu_to_be64(remote_handle), 4675 ioba, num_entries); 4676 4677 if (rc) 4678 print_subcrq_error(dev, rc, __func__); 4679 4680 return rc; 4681 } 4682 4683 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4684 union ibmvnic_crq *crq) 4685 { 4686 unsigned int ua = adapter->vdev->unit_address; 4687 struct device *dev = &adapter->vdev->dev; 4688 u64 *u64_crq = (u64 *)crq; 4689 int rc; 4690 4691 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4692 (unsigned long)cpu_to_be64(u64_crq[0]), 4693 (unsigned long)cpu_to_be64(u64_crq[1])); 4694 4695 if (!adapter->crq.active && 4696 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4697 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4698 return -EINVAL; 4699 } 4700 4701 /* Make sure the hypervisor sees the complete request */ 4702 dma_wmb(); 4703 4704 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4705 cpu_to_be64(u64_crq[0]), 4706 cpu_to_be64(u64_crq[1])); 4707 4708 if (rc) { 4709 if (rc == H_CLOSED) { 4710 dev_warn(dev, "CRQ Queue closed\n"); 4711 /* do not reset, report the fail, wait for passive init from server */ 4712 } 4713 4714 dev_warn(dev, "Send error (rc=%d)\n", rc); 4715 } 4716 4717 return rc; 4718 } 4719 4720 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4721 { 4722 struct device *dev = &adapter->vdev->dev; 4723 union ibmvnic_crq crq; 4724 int retries = 100; 4725 int rc; 4726 4727 memset(&crq, 0, sizeof(crq)); 4728 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4729 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4730 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4731 4732 do { 4733 rc = ibmvnic_send_crq(adapter, &crq); 4734 if (rc != H_CLOSED) 4735 break; 4736 retries--; 4737 msleep(50); 4738 4739 } while (retries > 0); 4740 4741 if (rc) { 4742 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4743 return rc; 4744 } 4745 4746 return 0; 4747 } 4748 4749 struct vnic_login_client_data { 4750 u8 type; 4751 __be16 len; 4752 char name[]; 4753 } __packed; 4754 4755 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4756 { 4757 int len; 4758 4759 /* Calculate the amount of buffer space needed for the 4760 * vnic client data in the login buffer. There are four entries, 4761 * OS name, LPAR name, device name, and a null last entry. 4762 */ 4763 len = 4 * sizeof(struct vnic_login_client_data); 4764 len += 6; /* "Linux" plus NULL */ 4765 len += strlen(utsname()->nodename) + 1; 4766 len += strlen(adapter->netdev->name) + 1; 4767 4768 return len; 4769 } 4770 4771 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4772 struct vnic_login_client_data *vlcd) 4773 { 4774 const char *os_name = "Linux"; 4775 int len; 4776 4777 /* Type 1 - LPAR OS */ 4778 vlcd->type = 1; 4779 len = strlen(os_name) + 1; 4780 vlcd->len = cpu_to_be16(len); 4781 strscpy(vlcd->name, os_name, len); 4782 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4783 4784 /* Type 2 - LPAR name */ 4785 vlcd->type = 2; 4786 len = strlen(utsname()->nodename) + 1; 4787 vlcd->len = cpu_to_be16(len); 4788 strscpy(vlcd->name, utsname()->nodename, len); 4789 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4790 4791 /* Type 3 - device name */ 4792 vlcd->type = 3; 4793 len = strlen(adapter->netdev->name) + 1; 4794 vlcd->len = cpu_to_be16(len); 4795 strscpy(vlcd->name, adapter->netdev->name, len); 4796 } 4797 4798 static int send_login(struct ibmvnic_adapter *adapter) 4799 { 4800 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4801 struct ibmvnic_login_buffer *login_buffer; 4802 struct device *dev = &adapter->vdev->dev; 4803 struct vnic_login_client_data *vlcd; 4804 dma_addr_t rsp_buffer_token; 4805 dma_addr_t buffer_token; 4806 size_t rsp_buffer_size; 4807 union ibmvnic_crq crq; 4808 int client_data_len; 4809 size_t buffer_size; 4810 __be64 *tx_list_p; 4811 __be64 *rx_list_p; 4812 int rc; 4813 int i; 4814 4815 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4816 netdev_err(adapter->netdev, 4817 "RX or TX queues are not allocated, device login failed\n"); 4818 return -ENOMEM; 4819 } 4820 4821 release_login_buffer(adapter); 4822 release_login_rsp_buffer(adapter); 4823 4824 client_data_len = vnic_client_data_len(adapter); 4825 4826 buffer_size = 4827 sizeof(struct ibmvnic_login_buffer) + 4828 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4829 client_data_len; 4830 4831 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4832 if (!login_buffer) 4833 goto buf_alloc_failed; 4834 4835 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4836 DMA_TO_DEVICE); 4837 if (dma_mapping_error(dev, buffer_token)) { 4838 dev_err(dev, "Couldn't map login buffer\n"); 4839 goto buf_map_failed; 4840 } 4841 4842 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4843 sizeof(u64) * adapter->req_tx_queues + 4844 sizeof(u64) * adapter->req_rx_queues + 4845 sizeof(u64) * adapter->req_rx_queues + 4846 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4847 4848 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4849 if (!login_rsp_buffer) 4850 goto buf_rsp_alloc_failed; 4851 4852 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4853 rsp_buffer_size, DMA_FROM_DEVICE); 4854 if (dma_mapping_error(dev, rsp_buffer_token)) { 4855 dev_err(dev, "Couldn't map login rsp buffer\n"); 4856 goto buf_rsp_map_failed; 4857 } 4858 4859 adapter->login_buf = login_buffer; 4860 adapter->login_buf_token = buffer_token; 4861 adapter->login_buf_sz = buffer_size; 4862 adapter->login_rsp_buf = login_rsp_buffer; 4863 adapter->login_rsp_buf_token = rsp_buffer_token; 4864 adapter->login_rsp_buf_sz = rsp_buffer_size; 4865 4866 login_buffer->len = cpu_to_be32(buffer_size); 4867 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4868 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4869 login_buffer->off_txcomp_subcrqs = 4870 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4871 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4872 login_buffer->off_rxcomp_subcrqs = 4873 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4874 sizeof(u64) * adapter->req_tx_queues); 4875 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4876 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4877 4878 tx_list_p = (__be64 *)((char *)login_buffer + 4879 sizeof(struct ibmvnic_login_buffer)); 4880 rx_list_p = (__be64 *)((char *)login_buffer + 4881 sizeof(struct ibmvnic_login_buffer) + 4882 sizeof(u64) * adapter->req_tx_queues); 4883 4884 for (i = 0; i < adapter->req_tx_queues; i++) { 4885 if (adapter->tx_scrq[i]) { 4886 tx_list_p[i] = 4887 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4888 } 4889 } 4890 4891 for (i = 0; i < adapter->req_rx_queues; i++) { 4892 if (adapter->rx_scrq[i]) { 4893 rx_list_p[i] = 4894 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4895 } 4896 } 4897 4898 /* Insert vNIC login client data */ 4899 vlcd = (struct vnic_login_client_data *) 4900 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4901 login_buffer->client_data_offset = 4902 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4903 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4904 4905 vnic_add_client_data(adapter, vlcd); 4906 4907 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4908 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4909 netdev_dbg(adapter->netdev, "%016lx\n", 4910 ((unsigned long *)(adapter->login_buf))[i]); 4911 } 4912 4913 memset(&crq, 0, sizeof(crq)); 4914 crq.login.first = IBMVNIC_CRQ_CMD; 4915 crq.login.cmd = LOGIN; 4916 crq.login.ioba = cpu_to_be32(buffer_token); 4917 crq.login.len = cpu_to_be32(buffer_size); 4918 4919 adapter->login_pending = true; 4920 rc = ibmvnic_send_crq(adapter, &crq); 4921 if (rc) { 4922 adapter->login_pending = false; 4923 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4924 goto buf_send_failed; 4925 } 4926 4927 return 0; 4928 4929 buf_send_failed: 4930 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4931 DMA_FROM_DEVICE); 4932 buf_rsp_map_failed: 4933 kfree(login_rsp_buffer); 4934 adapter->login_rsp_buf = NULL; 4935 buf_rsp_alloc_failed: 4936 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4937 buf_map_failed: 4938 kfree(login_buffer); 4939 adapter->login_buf = NULL; 4940 buf_alloc_failed: 4941 return -ENOMEM; 4942 } 4943 4944 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4945 u32 len, u8 map_id) 4946 { 4947 union ibmvnic_crq crq; 4948 4949 memset(&crq, 0, sizeof(crq)); 4950 crq.request_map.first = IBMVNIC_CRQ_CMD; 4951 crq.request_map.cmd = REQUEST_MAP; 4952 crq.request_map.map_id = map_id; 4953 crq.request_map.ioba = cpu_to_be32(addr); 4954 crq.request_map.len = cpu_to_be32(len); 4955 return ibmvnic_send_crq(adapter, &crq); 4956 } 4957 4958 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4959 { 4960 union ibmvnic_crq crq; 4961 4962 memset(&crq, 0, sizeof(crq)); 4963 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4964 crq.request_unmap.cmd = REQUEST_UNMAP; 4965 crq.request_unmap.map_id = map_id; 4966 return ibmvnic_send_crq(adapter, &crq); 4967 } 4968 4969 static void send_query_map(struct ibmvnic_adapter *adapter) 4970 { 4971 union ibmvnic_crq crq; 4972 4973 memset(&crq, 0, sizeof(crq)); 4974 crq.query_map.first = IBMVNIC_CRQ_CMD; 4975 crq.query_map.cmd = QUERY_MAP; 4976 ibmvnic_send_crq(adapter, &crq); 4977 } 4978 4979 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4980 static void send_query_cap(struct ibmvnic_adapter *adapter) 4981 { 4982 union ibmvnic_crq crq; 4983 int cap_reqs; 4984 4985 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4986 * upfront. When the tasklet receives a response to all of these, it 4987 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4988 */ 4989 cap_reqs = 25; 4990 4991 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4992 4993 memset(&crq, 0, sizeof(crq)); 4994 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4995 crq.query_capability.cmd = QUERY_CAPABILITY; 4996 4997 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4998 ibmvnic_send_crq(adapter, &crq); 4999 cap_reqs--; 5000 5001 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 5002 ibmvnic_send_crq(adapter, &crq); 5003 cap_reqs--; 5004 5005 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 5006 ibmvnic_send_crq(adapter, &crq); 5007 cap_reqs--; 5008 5009 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 5010 ibmvnic_send_crq(adapter, &crq); 5011 cap_reqs--; 5012 5013 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 5014 ibmvnic_send_crq(adapter, &crq); 5015 cap_reqs--; 5016 5017 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 5018 ibmvnic_send_crq(adapter, &crq); 5019 cap_reqs--; 5020 5021 crq.query_capability.capability = 5022 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5023 ibmvnic_send_crq(adapter, &crq); 5024 cap_reqs--; 5025 5026 crq.query_capability.capability = 5027 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5028 ibmvnic_send_crq(adapter, &crq); 5029 cap_reqs--; 5030 5031 crq.query_capability.capability = 5032 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5033 ibmvnic_send_crq(adapter, &crq); 5034 cap_reqs--; 5035 5036 crq.query_capability.capability = 5037 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5038 ibmvnic_send_crq(adapter, &crq); 5039 cap_reqs--; 5040 5041 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5042 ibmvnic_send_crq(adapter, &crq); 5043 cap_reqs--; 5044 5045 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5046 ibmvnic_send_crq(adapter, &crq); 5047 cap_reqs--; 5048 5049 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5050 ibmvnic_send_crq(adapter, &crq); 5051 cap_reqs--; 5052 5053 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5054 ibmvnic_send_crq(adapter, &crq); 5055 cap_reqs--; 5056 5057 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5058 ibmvnic_send_crq(adapter, &crq); 5059 cap_reqs--; 5060 5061 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5062 ibmvnic_send_crq(adapter, &crq); 5063 cap_reqs--; 5064 5065 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5066 ibmvnic_send_crq(adapter, &crq); 5067 cap_reqs--; 5068 5069 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5070 ibmvnic_send_crq(adapter, &crq); 5071 cap_reqs--; 5072 5073 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5074 ibmvnic_send_crq(adapter, &crq); 5075 cap_reqs--; 5076 5077 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5078 ibmvnic_send_crq(adapter, &crq); 5079 cap_reqs--; 5080 5081 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5082 ibmvnic_send_crq(adapter, &crq); 5083 cap_reqs--; 5084 5085 crq.query_capability.capability = 5086 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5087 ibmvnic_send_crq(adapter, &crq); 5088 cap_reqs--; 5089 5090 crq.query_capability.capability = 5091 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5092 ibmvnic_send_crq(adapter, &crq); 5093 cap_reqs--; 5094 5095 crq.query_capability.capability = 5096 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5097 ibmvnic_send_crq(adapter, &crq); 5098 cap_reqs--; 5099 5100 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5101 5102 ibmvnic_send_crq(adapter, &crq); 5103 cap_reqs--; 5104 5105 /* Keep at end to catch any discrepancy between expected and actual 5106 * CRQs sent. 5107 */ 5108 WARN_ON(cap_reqs != 0); 5109 } 5110 5111 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5112 { 5113 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5114 struct device *dev = &adapter->vdev->dev; 5115 union ibmvnic_crq crq; 5116 5117 adapter->ip_offload_tok = 5118 dma_map_single(dev, 5119 &adapter->ip_offload_buf, 5120 buf_sz, 5121 DMA_FROM_DEVICE); 5122 5123 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5124 if (!firmware_has_feature(FW_FEATURE_CMO)) 5125 dev_err(dev, "Couldn't map offload buffer\n"); 5126 return; 5127 } 5128 5129 memset(&crq, 0, sizeof(crq)); 5130 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5131 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5132 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5133 crq.query_ip_offload.ioba = 5134 cpu_to_be32(adapter->ip_offload_tok); 5135 5136 ibmvnic_send_crq(adapter, &crq); 5137 } 5138 5139 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5140 { 5141 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5142 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5143 struct device *dev = &adapter->vdev->dev; 5144 netdev_features_t old_hw_features = 0; 5145 union ibmvnic_crq crq; 5146 5147 adapter->ip_offload_ctrl_tok = 5148 dma_map_single(dev, 5149 ctrl_buf, 5150 sizeof(adapter->ip_offload_ctrl), 5151 DMA_TO_DEVICE); 5152 5153 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5154 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5155 return; 5156 } 5157 5158 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5159 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5160 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5161 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5162 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5163 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5164 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5165 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5166 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5167 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5168 5169 /* large_rx disabled for now, additional features needed */ 5170 ctrl_buf->large_rx_ipv4 = 0; 5171 ctrl_buf->large_rx_ipv6 = 0; 5172 5173 if (adapter->state != VNIC_PROBING) { 5174 old_hw_features = adapter->netdev->hw_features; 5175 adapter->netdev->hw_features = 0; 5176 } 5177 5178 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5179 5180 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5181 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5182 5183 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5184 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5185 5186 if ((adapter->netdev->features & 5187 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5188 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5189 5190 if (buf->large_tx_ipv4) 5191 adapter->netdev->hw_features |= NETIF_F_TSO; 5192 if (buf->large_tx_ipv6) 5193 adapter->netdev->hw_features |= NETIF_F_TSO6; 5194 5195 if (adapter->state == VNIC_PROBING) { 5196 adapter->netdev->features |= adapter->netdev->hw_features; 5197 } else if (old_hw_features != adapter->netdev->hw_features) { 5198 netdev_features_t tmp = 0; 5199 5200 /* disable features no longer supported */ 5201 adapter->netdev->features &= adapter->netdev->hw_features; 5202 /* turn on features now supported if previously enabled */ 5203 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5204 adapter->netdev->hw_features; 5205 adapter->netdev->features |= 5206 tmp & adapter->netdev->wanted_features; 5207 } 5208 5209 memset(&crq, 0, sizeof(crq)); 5210 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5211 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5212 crq.control_ip_offload.len = 5213 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5214 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5215 ibmvnic_send_crq(adapter, &crq); 5216 } 5217 5218 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5219 struct ibmvnic_adapter *adapter) 5220 { 5221 struct device *dev = &adapter->vdev->dev; 5222 5223 if (crq->get_vpd_size_rsp.rc.code) { 5224 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5225 crq->get_vpd_size_rsp.rc.code); 5226 complete(&adapter->fw_done); 5227 return; 5228 } 5229 5230 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5231 complete(&adapter->fw_done); 5232 } 5233 5234 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5235 struct ibmvnic_adapter *adapter) 5236 { 5237 struct device *dev = &adapter->vdev->dev; 5238 unsigned char *substr = NULL; 5239 u8 fw_level_len = 0; 5240 5241 memset(adapter->fw_version, 0, 32); 5242 5243 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5244 DMA_FROM_DEVICE); 5245 5246 if (crq->get_vpd_rsp.rc.code) { 5247 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5248 crq->get_vpd_rsp.rc.code); 5249 goto complete; 5250 } 5251 5252 /* get the position of the firmware version info 5253 * located after the ASCII 'RM' substring in the buffer 5254 */ 5255 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5256 if (!substr) { 5257 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5258 goto complete; 5259 } 5260 5261 /* get length of firmware level ASCII substring */ 5262 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5263 fw_level_len = *(substr + 2); 5264 } else { 5265 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5266 goto complete; 5267 } 5268 5269 /* copy firmware version string from vpd into adapter */ 5270 if ((substr + 3 + fw_level_len) < 5271 (adapter->vpd->buff + adapter->vpd->len)) { 5272 strscpy(adapter->fw_version, substr + 3, 5273 sizeof(adapter->fw_version)); 5274 } else { 5275 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5276 } 5277 5278 complete: 5279 if (adapter->fw_version[0] == '\0') 5280 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5281 complete(&adapter->fw_done); 5282 } 5283 5284 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5285 { 5286 struct device *dev = &adapter->vdev->dev; 5287 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5288 int i; 5289 5290 dma_unmap_single(dev, adapter->ip_offload_tok, 5291 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5292 5293 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5294 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5295 netdev_dbg(adapter->netdev, "%016lx\n", 5296 ((unsigned long *)(buf))[i]); 5297 5298 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5299 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5300 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5301 buf->tcp_ipv4_chksum); 5302 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5303 buf->tcp_ipv6_chksum); 5304 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5305 buf->udp_ipv4_chksum); 5306 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5307 buf->udp_ipv6_chksum); 5308 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5309 buf->large_tx_ipv4); 5310 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5311 buf->large_tx_ipv6); 5312 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5313 buf->large_rx_ipv4); 5314 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5315 buf->large_rx_ipv6); 5316 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5317 buf->max_ipv4_header_size); 5318 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5319 buf->max_ipv6_header_size); 5320 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5321 buf->max_tcp_header_size); 5322 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5323 buf->max_udp_header_size); 5324 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5325 buf->max_large_tx_size); 5326 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5327 buf->max_large_rx_size); 5328 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5329 buf->ipv6_extension_header); 5330 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5331 buf->tcp_pseudosum_req); 5332 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5333 buf->num_ipv6_ext_headers); 5334 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5335 buf->off_ipv6_ext_headers); 5336 5337 send_control_ip_offload(adapter); 5338 } 5339 5340 static const char *ibmvnic_fw_err_cause(u16 cause) 5341 { 5342 switch (cause) { 5343 case ADAPTER_PROBLEM: 5344 return "adapter problem"; 5345 case BUS_PROBLEM: 5346 return "bus problem"; 5347 case FW_PROBLEM: 5348 return "firmware problem"; 5349 case DD_PROBLEM: 5350 return "device driver problem"; 5351 case EEH_RECOVERY: 5352 return "EEH recovery"; 5353 case FW_UPDATED: 5354 return "firmware updated"; 5355 case LOW_MEMORY: 5356 return "low Memory"; 5357 default: 5358 return "unknown"; 5359 } 5360 } 5361 5362 static void handle_error_indication(union ibmvnic_crq *crq, 5363 struct ibmvnic_adapter *adapter) 5364 { 5365 struct device *dev = &adapter->vdev->dev; 5366 u16 cause; 5367 5368 cause = be16_to_cpu(crq->error_indication.error_cause); 5369 5370 dev_warn_ratelimited(dev, 5371 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5372 crq->error_indication.flags 5373 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5374 ibmvnic_fw_err_cause(cause)); 5375 5376 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5377 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5378 else 5379 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5380 } 5381 5382 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5383 struct ibmvnic_adapter *adapter) 5384 { 5385 struct net_device *netdev = adapter->netdev; 5386 struct device *dev = &adapter->vdev->dev; 5387 long rc; 5388 5389 rc = crq->change_mac_addr_rsp.rc.code; 5390 if (rc) { 5391 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5392 goto out; 5393 } 5394 /* crq->change_mac_addr.mac_addr is the requested one 5395 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5396 */ 5397 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5398 ether_addr_copy(adapter->mac_addr, 5399 &crq->change_mac_addr_rsp.mac_addr[0]); 5400 out: 5401 complete(&adapter->fw_done); 5402 return rc; 5403 } 5404 5405 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5406 struct ibmvnic_adapter *adapter) 5407 { 5408 struct device *dev = &adapter->vdev->dev; 5409 u64 *req_value; 5410 char *name; 5411 5412 atomic_dec(&adapter->running_cap_crqs); 5413 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5414 atomic_read(&adapter->running_cap_crqs)); 5415 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5416 case REQ_TX_QUEUES: 5417 req_value = &adapter->req_tx_queues; 5418 name = "tx"; 5419 break; 5420 case REQ_RX_QUEUES: 5421 req_value = &adapter->req_rx_queues; 5422 name = "rx"; 5423 break; 5424 case REQ_RX_ADD_QUEUES: 5425 req_value = &adapter->req_rx_add_queues; 5426 name = "rx_add"; 5427 break; 5428 case REQ_TX_ENTRIES_PER_SUBCRQ: 5429 req_value = &adapter->req_tx_entries_per_subcrq; 5430 name = "tx_entries_per_subcrq"; 5431 break; 5432 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5433 req_value = &adapter->req_rx_add_entries_per_subcrq; 5434 name = "rx_add_entries_per_subcrq"; 5435 break; 5436 case REQ_MTU: 5437 req_value = &adapter->req_mtu; 5438 name = "mtu"; 5439 break; 5440 case PROMISC_REQUESTED: 5441 req_value = &adapter->promisc; 5442 name = "promisc"; 5443 break; 5444 default: 5445 dev_err(dev, "Got invalid cap request rsp %d\n", 5446 crq->request_capability.capability); 5447 return; 5448 } 5449 5450 switch (crq->request_capability_rsp.rc.code) { 5451 case SUCCESS: 5452 break; 5453 case PARTIALSUCCESS: 5454 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5455 *req_value, 5456 (long)be64_to_cpu(crq->request_capability_rsp.number), 5457 name); 5458 5459 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5460 REQ_MTU) { 5461 pr_err("mtu of %llu is not supported. Reverting.\n", 5462 *req_value); 5463 *req_value = adapter->fallback.mtu; 5464 } else { 5465 *req_value = 5466 be64_to_cpu(crq->request_capability_rsp.number); 5467 } 5468 5469 send_request_cap(adapter, 1); 5470 return; 5471 default: 5472 dev_err(dev, "Error %d in request cap rsp\n", 5473 crq->request_capability_rsp.rc.code); 5474 return; 5475 } 5476 5477 /* Done receiving requested capabilities, query IP offload support */ 5478 if (atomic_read(&adapter->running_cap_crqs) == 0) 5479 send_query_ip_offload(adapter); 5480 } 5481 5482 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5483 struct ibmvnic_adapter *adapter) 5484 { 5485 struct device *dev = &adapter->vdev->dev; 5486 struct net_device *netdev = adapter->netdev; 5487 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5488 struct ibmvnic_login_buffer *login = adapter->login_buf; 5489 u64 *tx_handle_array; 5490 u64 *rx_handle_array; 5491 int num_tx_pools; 5492 int num_rx_pools; 5493 u64 *size_array; 5494 u32 rsp_len; 5495 int i; 5496 5497 /* CHECK: Test/set of login_pending does not need to be atomic 5498 * because only ibmvnic_tasklet tests/clears this. 5499 */ 5500 if (!adapter->login_pending) { 5501 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5502 return 0; 5503 } 5504 adapter->login_pending = false; 5505 5506 /* If the number of queues requested can't be allocated by the 5507 * server, the login response will return with code 1. We will need 5508 * to resend the login buffer with fewer queues requested. 5509 */ 5510 if (login_rsp_crq->generic.rc.code) { 5511 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5512 complete(&adapter->init_done); 5513 return 0; 5514 } 5515 5516 if (adapter->failover_pending) { 5517 adapter->init_done_rc = -EAGAIN; 5518 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5519 complete(&adapter->init_done); 5520 /* login response buffer will be released on reset */ 5521 return 0; 5522 } 5523 5524 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5525 5526 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5527 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5528 netdev_dbg(adapter->netdev, "%016lx\n", 5529 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5530 } 5531 5532 /* Sanity checks */ 5533 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5534 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5535 adapter->req_rx_add_queues != 5536 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5537 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5538 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5539 return -EIO; 5540 } 5541 5542 rsp_len = be32_to_cpu(login_rsp->len); 5543 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5544 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5545 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5546 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5547 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5548 /* This can happen if a login request times out and there are 5549 * 2 outstanding login requests sent, the LOGIN_RSP crq 5550 * could have been for the older login request. So we are 5551 * parsing the newer response buffer which may be incomplete 5552 */ 5553 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5554 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5555 return -EIO; 5556 } 5557 5558 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5559 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5560 /* variable buffer sizes are not supported, so just read the 5561 * first entry. 5562 */ 5563 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5564 5565 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5566 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5567 5568 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5569 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5570 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5571 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5572 5573 for (i = 0; i < num_tx_pools; i++) 5574 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5575 5576 for (i = 0; i < num_rx_pools; i++) 5577 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5578 5579 adapter->num_active_tx_scrqs = num_tx_pools; 5580 adapter->num_active_rx_scrqs = num_rx_pools; 5581 release_login_rsp_buffer(adapter); 5582 release_login_buffer(adapter); 5583 complete(&adapter->init_done); 5584 5585 return 0; 5586 } 5587 5588 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5589 struct ibmvnic_adapter *adapter) 5590 { 5591 struct device *dev = &adapter->vdev->dev; 5592 long rc; 5593 5594 rc = crq->request_unmap_rsp.rc.code; 5595 if (rc) 5596 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5597 } 5598 5599 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5600 struct ibmvnic_adapter *adapter) 5601 { 5602 struct net_device *netdev = adapter->netdev; 5603 struct device *dev = &adapter->vdev->dev; 5604 long rc; 5605 5606 rc = crq->query_map_rsp.rc.code; 5607 if (rc) { 5608 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5609 return; 5610 } 5611 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5612 crq->query_map_rsp.page_size, 5613 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5614 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5615 } 5616 5617 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5618 struct ibmvnic_adapter *adapter) 5619 { 5620 struct net_device *netdev = adapter->netdev; 5621 struct device *dev = &adapter->vdev->dev; 5622 long rc; 5623 5624 atomic_dec(&adapter->running_cap_crqs); 5625 netdev_dbg(netdev, "Outstanding queries: %d\n", 5626 atomic_read(&adapter->running_cap_crqs)); 5627 rc = crq->query_capability.rc.code; 5628 if (rc) { 5629 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5630 goto out; 5631 } 5632 5633 switch (be16_to_cpu(crq->query_capability.capability)) { 5634 case MIN_TX_QUEUES: 5635 adapter->min_tx_queues = 5636 be64_to_cpu(crq->query_capability.number); 5637 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5638 adapter->min_tx_queues); 5639 break; 5640 case MIN_RX_QUEUES: 5641 adapter->min_rx_queues = 5642 be64_to_cpu(crq->query_capability.number); 5643 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5644 adapter->min_rx_queues); 5645 break; 5646 case MIN_RX_ADD_QUEUES: 5647 adapter->min_rx_add_queues = 5648 be64_to_cpu(crq->query_capability.number); 5649 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5650 adapter->min_rx_add_queues); 5651 break; 5652 case MAX_TX_QUEUES: 5653 adapter->max_tx_queues = 5654 be64_to_cpu(crq->query_capability.number); 5655 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5656 adapter->max_tx_queues); 5657 break; 5658 case MAX_RX_QUEUES: 5659 adapter->max_rx_queues = 5660 be64_to_cpu(crq->query_capability.number); 5661 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5662 adapter->max_rx_queues); 5663 break; 5664 case MAX_RX_ADD_QUEUES: 5665 adapter->max_rx_add_queues = 5666 be64_to_cpu(crq->query_capability.number); 5667 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5668 adapter->max_rx_add_queues); 5669 break; 5670 case MIN_TX_ENTRIES_PER_SUBCRQ: 5671 adapter->min_tx_entries_per_subcrq = 5672 be64_to_cpu(crq->query_capability.number); 5673 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5674 adapter->min_tx_entries_per_subcrq); 5675 break; 5676 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5677 adapter->min_rx_add_entries_per_subcrq = 5678 be64_to_cpu(crq->query_capability.number); 5679 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5680 adapter->min_rx_add_entries_per_subcrq); 5681 break; 5682 case MAX_TX_ENTRIES_PER_SUBCRQ: 5683 adapter->max_tx_entries_per_subcrq = 5684 be64_to_cpu(crq->query_capability.number); 5685 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5686 adapter->max_tx_entries_per_subcrq); 5687 break; 5688 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5689 adapter->max_rx_add_entries_per_subcrq = 5690 be64_to_cpu(crq->query_capability.number); 5691 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5692 adapter->max_rx_add_entries_per_subcrq); 5693 break; 5694 case TCP_IP_OFFLOAD: 5695 adapter->tcp_ip_offload = 5696 be64_to_cpu(crq->query_capability.number); 5697 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5698 adapter->tcp_ip_offload); 5699 break; 5700 case PROMISC_SUPPORTED: 5701 adapter->promisc_supported = 5702 be64_to_cpu(crq->query_capability.number); 5703 netdev_dbg(netdev, "promisc_supported = %lld\n", 5704 adapter->promisc_supported); 5705 break; 5706 case MIN_MTU: 5707 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5708 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5709 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5710 break; 5711 case MAX_MTU: 5712 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5713 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5714 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5715 break; 5716 case MAX_MULTICAST_FILTERS: 5717 adapter->max_multicast_filters = 5718 be64_to_cpu(crq->query_capability.number); 5719 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5720 adapter->max_multicast_filters); 5721 break; 5722 case VLAN_HEADER_INSERTION: 5723 adapter->vlan_header_insertion = 5724 be64_to_cpu(crq->query_capability.number); 5725 if (adapter->vlan_header_insertion) 5726 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5727 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5728 adapter->vlan_header_insertion); 5729 break; 5730 case RX_VLAN_HEADER_INSERTION: 5731 adapter->rx_vlan_header_insertion = 5732 be64_to_cpu(crq->query_capability.number); 5733 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5734 adapter->rx_vlan_header_insertion); 5735 break; 5736 case MAX_TX_SG_ENTRIES: 5737 adapter->max_tx_sg_entries = 5738 be64_to_cpu(crq->query_capability.number); 5739 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5740 adapter->max_tx_sg_entries); 5741 break; 5742 case RX_SG_SUPPORTED: 5743 adapter->rx_sg_supported = 5744 be64_to_cpu(crq->query_capability.number); 5745 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5746 adapter->rx_sg_supported); 5747 break; 5748 case OPT_TX_COMP_SUB_QUEUES: 5749 adapter->opt_tx_comp_sub_queues = 5750 be64_to_cpu(crq->query_capability.number); 5751 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5752 adapter->opt_tx_comp_sub_queues); 5753 break; 5754 case OPT_RX_COMP_QUEUES: 5755 adapter->opt_rx_comp_queues = 5756 be64_to_cpu(crq->query_capability.number); 5757 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5758 adapter->opt_rx_comp_queues); 5759 break; 5760 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5761 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5762 be64_to_cpu(crq->query_capability.number); 5763 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5764 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5765 break; 5766 case OPT_TX_ENTRIES_PER_SUBCRQ: 5767 adapter->opt_tx_entries_per_subcrq = 5768 be64_to_cpu(crq->query_capability.number); 5769 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5770 adapter->opt_tx_entries_per_subcrq); 5771 break; 5772 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5773 adapter->opt_rxba_entries_per_subcrq = 5774 be64_to_cpu(crq->query_capability.number); 5775 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5776 adapter->opt_rxba_entries_per_subcrq); 5777 break; 5778 case TX_RX_DESC_REQ: 5779 adapter->tx_rx_desc_req = crq->query_capability.number; 5780 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5781 adapter->tx_rx_desc_req); 5782 break; 5783 5784 default: 5785 netdev_err(netdev, "Got invalid cap rsp %d\n", 5786 crq->query_capability.capability); 5787 } 5788 5789 out: 5790 if (atomic_read(&adapter->running_cap_crqs) == 0) 5791 send_request_cap(adapter, 0); 5792 } 5793 5794 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5795 { 5796 union ibmvnic_crq crq; 5797 int rc; 5798 5799 memset(&crq, 0, sizeof(crq)); 5800 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5801 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5802 5803 mutex_lock(&adapter->fw_lock); 5804 adapter->fw_done_rc = 0; 5805 reinit_completion(&adapter->fw_done); 5806 5807 rc = ibmvnic_send_crq(adapter, &crq); 5808 if (rc) { 5809 mutex_unlock(&adapter->fw_lock); 5810 return rc; 5811 } 5812 5813 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5814 if (rc) { 5815 mutex_unlock(&adapter->fw_lock); 5816 return rc; 5817 } 5818 5819 mutex_unlock(&adapter->fw_lock); 5820 return adapter->fw_done_rc ? -EIO : 0; 5821 } 5822 5823 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5824 struct ibmvnic_adapter *adapter) 5825 { 5826 struct net_device *netdev = adapter->netdev; 5827 int rc; 5828 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5829 5830 rc = crq->query_phys_parms_rsp.rc.code; 5831 if (rc) { 5832 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5833 return rc; 5834 } 5835 switch (rspeed) { 5836 case IBMVNIC_10MBPS: 5837 adapter->speed = SPEED_10; 5838 break; 5839 case IBMVNIC_100MBPS: 5840 adapter->speed = SPEED_100; 5841 break; 5842 case IBMVNIC_1GBPS: 5843 adapter->speed = SPEED_1000; 5844 break; 5845 case IBMVNIC_10GBPS: 5846 adapter->speed = SPEED_10000; 5847 break; 5848 case IBMVNIC_25GBPS: 5849 adapter->speed = SPEED_25000; 5850 break; 5851 case IBMVNIC_40GBPS: 5852 adapter->speed = SPEED_40000; 5853 break; 5854 case IBMVNIC_50GBPS: 5855 adapter->speed = SPEED_50000; 5856 break; 5857 case IBMVNIC_100GBPS: 5858 adapter->speed = SPEED_100000; 5859 break; 5860 case IBMVNIC_200GBPS: 5861 adapter->speed = SPEED_200000; 5862 break; 5863 default: 5864 if (netif_carrier_ok(netdev)) 5865 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5866 adapter->speed = SPEED_UNKNOWN; 5867 } 5868 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5869 adapter->duplex = DUPLEX_FULL; 5870 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5871 adapter->duplex = DUPLEX_HALF; 5872 else 5873 adapter->duplex = DUPLEX_UNKNOWN; 5874 5875 return rc; 5876 } 5877 5878 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5879 struct ibmvnic_adapter *adapter) 5880 { 5881 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5882 struct net_device *netdev = adapter->netdev; 5883 struct device *dev = &adapter->vdev->dev; 5884 u64 *u64_crq = (u64 *)crq; 5885 long rc; 5886 5887 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5888 (unsigned long)cpu_to_be64(u64_crq[0]), 5889 (unsigned long)cpu_to_be64(u64_crq[1])); 5890 switch (gen_crq->first) { 5891 case IBMVNIC_CRQ_INIT_RSP: 5892 switch (gen_crq->cmd) { 5893 case IBMVNIC_CRQ_INIT: 5894 dev_info(dev, "Partner initialized\n"); 5895 adapter->from_passive_init = true; 5896 /* Discard any stale login responses from prev reset. 5897 * CHECK: should we clear even on INIT_COMPLETE? 5898 */ 5899 adapter->login_pending = false; 5900 5901 if (adapter->state == VNIC_DOWN) 5902 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5903 else 5904 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5905 5906 if (rc && rc != -EBUSY) { 5907 /* We were unable to schedule the failover 5908 * reset either because the adapter was still 5909 * probing (eg: during kexec) or we could not 5910 * allocate memory. Clear the failover_pending 5911 * flag since no one else will. We ignore 5912 * EBUSY because it means either FAILOVER reset 5913 * is already scheduled or the adapter is 5914 * being removed. 5915 */ 5916 netdev_err(netdev, 5917 "Error %ld scheduling failover reset\n", 5918 rc); 5919 adapter->failover_pending = false; 5920 } 5921 5922 if (!completion_done(&adapter->init_done)) { 5923 if (!adapter->init_done_rc) 5924 adapter->init_done_rc = -EAGAIN; 5925 complete(&adapter->init_done); 5926 } 5927 5928 break; 5929 case IBMVNIC_CRQ_INIT_COMPLETE: 5930 dev_info(dev, "Partner initialization complete\n"); 5931 adapter->crq.active = true; 5932 send_version_xchg(adapter); 5933 break; 5934 default: 5935 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5936 } 5937 return; 5938 case IBMVNIC_CRQ_XPORT_EVENT: 5939 netif_carrier_off(netdev); 5940 adapter->crq.active = false; 5941 /* terminate any thread waiting for a response 5942 * from the device 5943 */ 5944 if (!completion_done(&adapter->fw_done)) { 5945 adapter->fw_done_rc = -EIO; 5946 complete(&adapter->fw_done); 5947 } 5948 5949 /* if we got here during crq-init, retry crq-init */ 5950 if (!completion_done(&adapter->init_done)) { 5951 adapter->init_done_rc = -EAGAIN; 5952 complete(&adapter->init_done); 5953 } 5954 5955 if (!completion_done(&adapter->stats_done)) 5956 complete(&adapter->stats_done); 5957 if (test_bit(0, &adapter->resetting)) 5958 adapter->force_reset_recovery = true; 5959 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5960 dev_info(dev, "Migrated, re-enabling adapter\n"); 5961 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5962 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5963 dev_info(dev, "Backing device failover detected\n"); 5964 adapter->failover_pending = true; 5965 } else { 5966 /* The adapter lost the connection */ 5967 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5968 gen_crq->cmd); 5969 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5970 } 5971 return; 5972 case IBMVNIC_CRQ_CMD_RSP: 5973 break; 5974 default: 5975 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5976 gen_crq->first); 5977 return; 5978 } 5979 5980 switch (gen_crq->cmd) { 5981 case VERSION_EXCHANGE_RSP: 5982 rc = crq->version_exchange_rsp.rc.code; 5983 if (rc) { 5984 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5985 break; 5986 } 5987 ibmvnic_version = 5988 be16_to_cpu(crq->version_exchange_rsp.version); 5989 dev_info(dev, "Partner protocol version is %d\n", 5990 ibmvnic_version); 5991 send_query_cap(adapter); 5992 break; 5993 case QUERY_CAPABILITY_RSP: 5994 handle_query_cap_rsp(crq, adapter); 5995 break; 5996 case QUERY_MAP_RSP: 5997 handle_query_map_rsp(crq, adapter); 5998 break; 5999 case REQUEST_MAP_RSP: 6000 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 6001 complete(&adapter->fw_done); 6002 break; 6003 case REQUEST_UNMAP_RSP: 6004 handle_request_unmap_rsp(crq, adapter); 6005 break; 6006 case REQUEST_CAPABILITY_RSP: 6007 handle_request_cap_rsp(crq, adapter); 6008 break; 6009 case LOGIN_RSP: 6010 netdev_dbg(netdev, "Got Login Response\n"); 6011 handle_login_rsp(crq, adapter); 6012 break; 6013 case LOGICAL_LINK_STATE_RSP: 6014 netdev_dbg(netdev, 6015 "Got Logical Link State Response, state: %d rc: %d\n", 6016 crq->logical_link_state_rsp.link_state, 6017 crq->logical_link_state_rsp.rc.code); 6018 adapter->logical_link_state = 6019 crq->logical_link_state_rsp.link_state; 6020 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 6021 complete(&adapter->init_done); 6022 break; 6023 case LINK_STATE_INDICATION: 6024 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6025 adapter->phys_link_state = 6026 crq->link_state_indication.phys_link_state; 6027 adapter->logical_link_state = 6028 crq->link_state_indication.logical_link_state; 6029 if (adapter->phys_link_state && adapter->logical_link_state) 6030 netif_carrier_on(netdev); 6031 else 6032 netif_carrier_off(netdev); 6033 break; 6034 case CHANGE_MAC_ADDR_RSP: 6035 netdev_dbg(netdev, "Got MAC address change Response\n"); 6036 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6037 break; 6038 case ERROR_INDICATION: 6039 netdev_dbg(netdev, "Got Error Indication\n"); 6040 handle_error_indication(crq, adapter); 6041 break; 6042 case REQUEST_STATISTICS_RSP: 6043 netdev_dbg(netdev, "Got Statistics Response\n"); 6044 complete(&adapter->stats_done); 6045 break; 6046 case QUERY_IP_OFFLOAD_RSP: 6047 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6048 handle_query_ip_offload_rsp(adapter); 6049 break; 6050 case MULTICAST_CTRL_RSP: 6051 netdev_dbg(netdev, "Got multicast control Response\n"); 6052 break; 6053 case CONTROL_IP_OFFLOAD_RSP: 6054 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6055 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6056 sizeof(adapter->ip_offload_ctrl), 6057 DMA_TO_DEVICE); 6058 complete(&adapter->init_done); 6059 break; 6060 case COLLECT_FW_TRACE_RSP: 6061 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6062 complete(&adapter->fw_done); 6063 break; 6064 case GET_VPD_SIZE_RSP: 6065 handle_vpd_size_rsp(crq, adapter); 6066 break; 6067 case GET_VPD_RSP: 6068 handle_vpd_rsp(crq, adapter); 6069 break; 6070 case QUERY_PHYS_PARMS_RSP: 6071 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6072 complete(&adapter->fw_done); 6073 break; 6074 default: 6075 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6076 gen_crq->cmd); 6077 } 6078 } 6079 6080 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6081 { 6082 struct ibmvnic_adapter *adapter = instance; 6083 6084 tasklet_schedule(&adapter->tasklet); 6085 return IRQ_HANDLED; 6086 } 6087 6088 static void ibmvnic_tasklet(struct tasklet_struct *t) 6089 { 6090 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6091 struct ibmvnic_crq_queue *queue = &adapter->crq; 6092 union ibmvnic_crq *crq; 6093 unsigned long flags; 6094 6095 spin_lock_irqsave(&queue->lock, flags); 6096 6097 /* Pull all the valid messages off the CRQ */ 6098 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6099 /* This barrier makes sure ibmvnic_next_crq()'s 6100 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6101 * before ibmvnic_handle_crq()'s 6102 * switch(gen_crq->first) and switch(gen_crq->cmd). 6103 */ 6104 dma_rmb(); 6105 ibmvnic_handle_crq(crq, adapter); 6106 crq->generic.first = 0; 6107 } 6108 6109 spin_unlock_irqrestore(&queue->lock, flags); 6110 } 6111 6112 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6113 { 6114 struct vio_dev *vdev = adapter->vdev; 6115 int rc; 6116 6117 do { 6118 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6119 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6120 6121 if (rc) 6122 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6123 6124 return rc; 6125 } 6126 6127 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6128 { 6129 struct ibmvnic_crq_queue *crq = &adapter->crq; 6130 struct device *dev = &adapter->vdev->dev; 6131 struct vio_dev *vdev = adapter->vdev; 6132 int rc; 6133 6134 /* Close the CRQ */ 6135 do { 6136 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6137 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6138 6139 /* Clean out the queue */ 6140 if (!crq->msgs) 6141 return -EINVAL; 6142 6143 memset(crq->msgs, 0, PAGE_SIZE); 6144 crq->cur = 0; 6145 crq->active = false; 6146 6147 /* And re-open it again */ 6148 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6149 crq->msg_token, PAGE_SIZE); 6150 6151 if (rc == H_CLOSED) 6152 /* Adapter is good, but other end is not ready */ 6153 dev_warn(dev, "Partner adapter not ready\n"); 6154 else if (rc != 0) 6155 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6156 6157 return rc; 6158 } 6159 6160 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6161 { 6162 struct ibmvnic_crq_queue *crq = &adapter->crq; 6163 struct vio_dev *vdev = adapter->vdev; 6164 long rc; 6165 6166 if (!crq->msgs) 6167 return; 6168 6169 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6170 free_irq(vdev->irq, adapter); 6171 tasklet_kill(&adapter->tasklet); 6172 do { 6173 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6174 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6175 6176 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6177 DMA_BIDIRECTIONAL); 6178 free_page((unsigned long)crq->msgs); 6179 crq->msgs = NULL; 6180 crq->active = false; 6181 } 6182 6183 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6184 { 6185 struct ibmvnic_crq_queue *crq = &adapter->crq; 6186 struct device *dev = &adapter->vdev->dev; 6187 struct vio_dev *vdev = adapter->vdev; 6188 int rc, retrc = -ENOMEM; 6189 6190 if (crq->msgs) 6191 return 0; 6192 6193 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6194 /* Should we allocate more than one page? */ 6195 6196 if (!crq->msgs) 6197 return -ENOMEM; 6198 6199 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6200 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6201 DMA_BIDIRECTIONAL); 6202 if (dma_mapping_error(dev, crq->msg_token)) 6203 goto map_failed; 6204 6205 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6206 crq->msg_token, PAGE_SIZE); 6207 6208 if (rc == H_RESOURCE) 6209 /* maybe kexecing and resource is busy. try a reset */ 6210 rc = ibmvnic_reset_crq(adapter); 6211 retrc = rc; 6212 6213 if (rc == H_CLOSED) { 6214 dev_warn(dev, "Partner adapter not ready\n"); 6215 } else if (rc) { 6216 dev_warn(dev, "Error %d opening adapter\n", rc); 6217 goto reg_crq_failed; 6218 } 6219 6220 retrc = 0; 6221 6222 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6223 6224 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6225 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6226 adapter->vdev->unit_address); 6227 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6228 if (rc) { 6229 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6230 vdev->irq, rc); 6231 goto req_irq_failed; 6232 } 6233 6234 rc = vio_enable_interrupts(vdev); 6235 if (rc) { 6236 dev_err(dev, "Error %d enabling interrupts\n", rc); 6237 goto req_irq_failed; 6238 } 6239 6240 crq->cur = 0; 6241 spin_lock_init(&crq->lock); 6242 6243 /* process any CRQs that were queued before we enabled interrupts */ 6244 tasklet_schedule(&adapter->tasklet); 6245 6246 return retrc; 6247 6248 req_irq_failed: 6249 tasklet_kill(&adapter->tasklet); 6250 do { 6251 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6252 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6253 reg_crq_failed: 6254 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6255 map_failed: 6256 free_page((unsigned long)crq->msgs); 6257 crq->msgs = NULL; 6258 return retrc; 6259 } 6260 6261 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6262 { 6263 struct device *dev = &adapter->vdev->dev; 6264 unsigned long timeout = msecs_to_jiffies(20000); 6265 u64 old_num_rx_queues = adapter->req_rx_queues; 6266 u64 old_num_tx_queues = adapter->req_tx_queues; 6267 int rc; 6268 6269 adapter->from_passive_init = false; 6270 6271 rc = ibmvnic_send_crq_init(adapter); 6272 if (rc) { 6273 dev_err(dev, "Send crq init failed with error %d\n", rc); 6274 return rc; 6275 } 6276 6277 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6278 dev_err(dev, "Initialization sequence timed out\n"); 6279 return -ETIMEDOUT; 6280 } 6281 6282 if (adapter->init_done_rc) { 6283 release_crq_queue(adapter); 6284 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6285 return adapter->init_done_rc; 6286 } 6287 6288 if (adapter->from_passive_init) { 6289 adapter->state = VNIC_OPEN; 6290 adapter->from_passive_init = false; 6291 dev_err(dev, "CRQ-init failed, passive-init\n"); 6292 return -EINVAL; 6293 } 6294 6295 if (reset && 6296 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6297 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6298 if (adapter->req_rx_queues != old_num_rx_queues || 6299 adapter->req_tx_queues != old_num_tx_queues) { 6300 release_sub_crqs(adapter, 0); 6301 rc = init_sub_crqs(adapter); 6302 } else { 6303 /* no need to reinitialize completely, but we do 6304 * need to clean up transmits that were in flight 6305 * when we processed the reset. Failure to do so 6306 * will confound the upper layer, usually TCP, by 6307 * creating the illusion of transmits that are 6308 * awaiting completion. 6309 */ 6310 clean_tx_pools(adapter); 6311 6312 rc = reset_sub_crq_queues(adapter); 6313 } 6314 } else { 6315 rc = init_sub_crqs(adapter); 6316 } 6317 6318 if (rc) { 6319 dev_err(dev, "Initialization of sub crqs failed\n"); 6320 release_crq_queue(adapter); 6321 return rc; 6322 } 6323 6324 rc = init_sub_crq_irqs(adapter); 6325 if (rc) { 6326 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6327 release_crq_queue(adapter); 6328 } 6329 6330 return rc; 6331 } 6332 6333 static struct device_attribute dev_attr_failover; 6334 6335 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6336 { 6337 struct ibmvnic_adapter *adapter; 6338 struct net_device *netdev; 6339 unsigned char *mac_addr_p; 6340 unsigned long flags; 6341 bool init_success; 6342 int rc; 6343 6344 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6345 dev->unit_address); 6346 6347 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6348 VETH_MAC_ADDR, NULL); 6349 if (!mac_addr_p) { 6350 dev_err(&dev->dev, 6351 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6352 __FILE__, __LINE__); 6353 return 0; 6354 } 6355 6356 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6357 IBMVNIC_MAX_QUEUES); 6358 if (!netdev) 6359 return -ENOMEM; 6360 6361 adapter = netdev_priv(netdev); 6362 adapter->state = VNIC_PROBING; 6363 dev_set_drvdata(&dev->dev, netdev); 6364 adapter->vdev = dev; 6365 adapter->netdev = netdev; 6366 adapter->login_pending = false; 6367 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6368 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6369 bitmap_set(adapter->map_ids, 0, 1); 6370 6371 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6372 eth_hw_addr_set(netdev, adapter->mac_addr); 6373 netdev->irq = dev->irq; 6374 netdev->netdev_ops = &ibmvnic_netdev_ops; 6375 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6376 SET_NETDEV_DEV(netdev, &dev->dev); 6377 6378 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6379 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6380 __ibmvnic_delayed_reset); 6381 INIT_LIST_HEAD(&adapter->rwi_list); 6382 spin_lock_init(&adapter->rwi_lock); 6383 spin_lock_init(&adapter->state_lock); 6384 mutex_init(&adapter->fw_lock); 6385 init_completion(&adapter->probe_done); 6386 init_completion(&adapter->init_done); 6387 init_completion(&adapter->fw_done); 6388 init_completion(&adapter->reset_done); 6389 init_completion(&adapter->stats_done); 6390 clear_bit(0, &adapter->resetting); 6391 adapter->prev_rx_buf_sz = 0; 6392 adapter->prev_mtu = 0; 6393 6394 init_success = false; 6395 do { 6396 reinit_init_done(adapter); 6397 6398 /* clear any failovers we got in the previous pass 6399 * since we are reinitializing the CRQ 6400 */ 6401 adapter->failover_pending = false; 6402 6403 /* If we had already initialized CRQ, we may have one or 6404 * more resets queued already. Discard those and release 6405 * the CRQ before initializing the CRQ again. 6406 */ 6407 release_crq_queue(adapter); 6408 6409 /* Since we are still in PROBING state, __ibmvnic_reset() 6410 * will not access the ->rwi_list and since we released CRQ, 6411 * we won't get _new_ transport events. But there maybe an 6412 * ongoing ibmvnic_reset() call. So serialize access to 6413 * rwi_list. If we win the race, ibvmnic_reset() could add 6414 * a reset after we purged but thats ok - we just may end 6415 * up with an extra reset (i.e similar to having two or more 6416 * resets in the queue at once). 6417 * CHECK. 6418 */ 6419 spin_lock_irqsave(&adapter->rwi_lock, flags); 6420 flush_reset_queue(adapter); 6421 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6422 6423 rc = init_crq_queue(adapter); 6424 if (rc) { 6425 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6426 rc); 6427 goto ibmvnic_init_fail; 6428 } 6429 6430 rc = ibmvnic_reset_init(adapter, false); 6431 } while (rc == -EAGAIN); 6432 6433 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6434 * partner is not ready. CRQ is not active. When the partner becomes 6435 * ready, we will do the passive init reset. 6436 */ 6437 6438 if (!rc) 6439 init_success = true; 6440 6441 rc = init_stats_buffers(adapter); 6442 if (rc) 6443 goto ibmvnic_init_fail; 6444 6445 rc = init_stats_token(adapter); 6446 if (rc) 6447 goto ibmvnic_stats_fail; 6448 6449 rc = device_create_file(&dev->dev, &dev_attr_failover); 6450 if (rc) 6451 goto ibmvnic_dev_file_err; 6452 6453 netif_carrier_off(netdev); 6454 6455 if (init_success) { 6456 adapter->state = VNIC_PROBED; 6457 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6458 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6459 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6460 } else { 6461 adapter->state = VNIC_DOWN; 6462 } 6463 6464 adapter->wait_for_reset = false; 6465 adapter->last_reset_time = jiffies; 6466 6467 rc = register_netdev(netdev); 6468 if (rc) { 6469 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6470 goto ibmvnic_register_fail; 6471 } 6472 dev_info(&dev->dev, "ibmvnic registered\n"); 6473 6474 rc = ibmvnic_cpu_notif_add(adapter); 6475 if (rc) { 6476 netdev_err(netdev, "Registering cpu notifier failed\n"); 6477 goto cpu_notif_add_failed; 6478 } 6479 6480 complete(&adapter->probe_done); 6481 6482 return 0; 6483 6484 cpu_notif_add_failed: 6485 unregister_netdev(netdev); 6486 6487 ibmvnic_register_fail: 6488 device_remove_file(&dev->dev, &dev_attr_failover); 6489 6490 ibmvnic_dev_file_err: 6491 release_stats_token(adapter); 6492 6493 ibmvnic_stats_fail: 6494 release_stats_buffers(adapter); 6495 6496 ibmvnic_init_fail: 6497 release_sub_crqs(adapter, 1); 6498 release_crq_queue(adapter); 6499 6500 /* cleanup worker thread after releasing CRQ so we don't get 6501 * transport events (i.e new work items for the worker thread). 6502 */ 6503 adapter->state = VNIC_REMOVING; 6504 complete(&adapter->probe_done); 6505 flush_work(&adapter->ibmvnic_reset); 6506 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6507 6508 flush_reset_queue(adapter); 6509 6510 mutex_destroy(&adapter->fw_lock); 6511 free_netdev(netdev); 6512 6513 return rc; 6514 } 6515 6516 static void ibmvnic_remove(struct vio_dev *dev) 6517 { 6518 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6519 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6520 unsigned long flags; 6521 6522 spin_lock_irqsave(&adapter->state_lock, flags); 6523 6524 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6525 * finish. Then, set the state to REMOVING to prevent it from 6526 * scheduling any more work and to have reset functions ignore 6527 * any resets that have already been scheduled. Drop the lock 6528 * after setting state, so __ibmvnic_reset() which is called 6529 * from the flush_work() below, can make progress. 6530 */ 6531 spin_lock(&adapter->rwi_lock); 6532 adapter->state = VNIC_REMOVING; 6533 spin_unlock(&adapter->rwi_lock); 6534 6535 spin_unlock_irqrestore(&adapter->state_lock, flags); 6536 6537 ibmvnic_cpu_notif_remove(adapter); 6538 6539 flush_work(&adapter->ibmvnic_reset); 6540 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6541 6542 rtnl_lock(); 6543 unregister_netdevice(netdev); 6544 6545 release_resources(adapter); 6546 release_rx_pools(adapter); 6547 release_tx_pools(adapter); 6548 release_sub_crqs(adapter, 1); 6549 release_crq_queue(adapter); 6550 6551 release_stats_token(adapter); 6552 release_stats_buffers(adapter); 6553 6554 adapter->state = VNIC_REMOVED; 6555 6556 rtnl_unlock(); 6557 mutex_destroy(&adapter->fw_lock); 6558 device_remove_file(&dev->dev, &dev_attr_failover); 6559 free_netdev(netdev); 6560 dev_set_drvdata(&dev->dev, NULL); 6561 } 6562 6563 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6564 const char *buf, size_t count) 6565 { 6566 struct net_device *netdev = dev_get_drvdata(dev); 6567 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6568 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6569 __be64 session_token; 6570 long rc; 6571 6572 if (!sysfs_streq(buf, "1")) 6573 return -EINVAL; 6574 6575 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6576 H_GET_SESSION_TOKEN, 0, 0, 0); 6577 if (rc) { 6578 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6579 rc); 6580 goto last_resort; 6581 } 6582 6583 session_token = (__be64)retbuf[0]; 6584 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6585 be64_to_cpu(session_token)); 6586 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6587 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6588 if (rc) { 6589 netdev_err(netdev, 6590 "H_VIOCTL initiated failover failed, rc %ld\n", 6591 rc); 6592 goto last_resort; 6593 } 6594 6595 return count; 6596 6597 last_resort: 6598 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6599 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6600 6601 return count; 6602 } 6603 static DEVICE_ATTR_WO(failover); 6604 6605 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6606 { 6607 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6608 struct ibmvnic_adapter *adapter; 6609 struct iommu_table *tbl; 6610 unsigned long ret = 0; 6611 int i; 6612 6613 tbl = get_iommu_table_base(&vdev->dev); 6614 6615 /* netdev inits at probe time along with the structures we need below*/ 6616 if (!netdev) 6617 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6618 6619 adapter = netdev_priv(netdev); 6620 6621 ret += PAGE_SIZE; /* the crq message queue */ 6622 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6623 6624 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6625 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6626 6627 for (i = 0; i < adapter->num_active_rx_pools; i++) 6628 ret += adapter->rx_pool[i].size * 6629 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6630 6631 return ret; 6632 } 6633 6634 static int ibmvnic_resume(struct device *dev) 6635 { 6636 struct net_device *netdev = dev_get_drvdata(dev); 6637 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6638 6639 if (adapter->state != VNIC_OPEN) 6640 return 0; 6641 6642 tasklet_schedule(&adapter->tasklet); 6643 6644 return 0; 6645 } 6646 6647 static const struct vio_device_id ibmvnic_device_table[] = { 6648 {"network", "IBM,vnic"}, 6649 {"", "" } 6650 }; 6651 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6652 6653 static const struct dev_pm_ops ibmvnic_pm_ops = { 6654 .resume = ibmvnic_resume 6655 }; 6656 6657 static struct vio_driver ibmvnic_driver = { 6658 .id_table = ibmvnic_device_table, 6659 .probe = ibmvnic_probe, 6660 .remove = ibmvnic_remove, 6661 .get_desired_dma = ibmvnic_get_desired_dma, 6662 .name = ibmvnic_driver_name, 6663 .pm = &ibmvnic_pm_ops, 6664 }; 6665 6666 /* module functions */ 6667 static int __init ibmvnic_module_init(void) 6668 { 6669 int ret; 6670 6671 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6672 ibmvnic_cpu_online, 6673 ibmvnic_cpu_down_prep); 6674 if (ret < 0) 6675 goto out; 6676 ibmvnic_online = ret; 6677 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6678 NULL, ibmvnic_cpu_dead); 6679 if (ret) 6680 goto err_dead; 6681 6682 ret = vio_register_driver(&ibmvnic_driver); 6683 if (ret) 6684 goto err_vio_register; 6685 6686 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6687 IBMVNIC_DRIVER_VERSION); 6688 6689 return 0; 6690 err_vio_register: 6691 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6692 err_dead: 6693 cpuhp_remove_multi_state(ibmvnic_online); 6694 out: 6695 return ret; 6696 } 6697 6698 static void __exit ibmvnic_module_exit(void) 6699 { 6700 vio_unregister_driver(&ibmvnic_driver); 6701 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6702 cpuhp_remove_multi_state(ibmvnic_online); 6703 } 6704 6705 module_init(ibmvnic_module_init); 6706 module_exit(ibmvnic_module_exit); 6707