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