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 static void print_subcrq_error(struct device *dev, int rc, const char *func); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 157 { 158 union ibmvnic_crq crq; 159 160 memset(&crq, 0, sizeof(crq)); 161 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 162 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 163 164 return ibmvnic_send_crq(adapter, &crq); 165 } 166 167 static int send_version_xchg(struct ibmvnic_adapter *adapter) 168 { 169 union ibmvnic_crq crq; 170 171 memset(&crq, 0, sizeof(crq)); 172 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 173 crq.version_exchange.cmd = VERSION_EXCHANGE; 174 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 175 176 return ibmvnic_send_crq(adapter, &crq); 177 } 178 179 static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter, 180 struct ibmvnic_sub_crq_queue *queue) 181 { 182 if (!(queue && queue->irq)) 183 return; 184 185 cpumask_clear(queue->affinity_mask); 186 187 if (irq_set_affinity_and_hint(queue->irq, NULL)) 188 netdev_warn(adapter->netdev, 189 "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n", 190 __func__, queue, queue->irq); 191 } 192 193 static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter) 194 { 195 struct ibmvnic_sub_crq_queue **rxqs; 196 struct ibmvnic_sub_crq_queue **txqs; 197 int num_rxqs, num_txqs; 198 int i; 199 200 rxqs = adapter->rx_scrq; 201 txqs = adapter->tx_scrq; 202 num_txqs = adapter->num_active_tx_scrqs; 203 num_rxqs = adapter->num_active_rx_scrqs; 204 205 netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__); 206 if (txqs) { 207 for (i = 0; i < num_txqs; i++) 208 ibmvnic_clean_queue_affinity(adapter, txqs[i]); 209 } 210 if (rxqs) { 211 for (i = 0; i < num_rxqs; i++) 212 ibmvnic_clean_queue_affinity(adapter, rxqs[i]); 213 } 214 } 215 216 static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue, 217 unsigned int *cpu, int *stragglers, 218 int stride) 219 { 220 cpumask_var_t mask; 221 int i; 222 int rc = 0; 223 224 if (!(queue && queue->irq)) 225 return rc; 226 227 /* cpumask_var_t is either a pointer or array, allocation works here */ 228 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 229 return -ENOMEM; 230 231 /* while we have extra cpu give one extra to this irq */ 232 if (*stragglers) { 233 stride++; 234 (*stragglers)--; 235 } 236 /* atomic write is safer than writing bit by bit directly */ 237 for (i = 0; i < stride; i++) { 238 cpumask_set_cpu(*cpu, mask); 239 *cpu = cpumask_next_wrap(*cpu, cpu_online_mask, 240 nr_cpu_ids, false); 241 } 242 /* set queue affinity mask */ 243 cpumask_copy(queue->affinity_mask, mask); 244 rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask); 245 free_cpumask_var(mask); 246 247 return rc; 248 } 249 250 /* assumes cpu read lock is held */ 251 static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter) 252 { 253 struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq; 254 struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq; 255 struct ibmvnic_sub_crq_queue *queue; 256 int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0; 257 int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0; 258 int total_queues, stride, stragglers, i; 259 unsigned int num_cpu, cpu; 260 bool is_rx_queue; 261 int rc = 0; 262 263 netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__); 264 if (!(adapter->rx_scrq && adapter->tx_scrq)) { 265 netdev_warn(adapter->netdev, 266 "%s: Set affinity failed, queues not allocated\n", 267 __func__); 268 return; 269 } 270 271 total_queues = num_rxqs + num_txqs; 272 num_cpu = num_online_cpus(); 273 /* number of cpu's assigned per irq */ 274 stride = max_t(int, num_cpu / total_queues, 1); 275 /* number of leftover cpu's */ 276 stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0; 277 /* next available cpu to assign irq to */ 278 cpu = cpumask_next(-1, cpu_online_mask); 279 280 for (i = 0; i < total_queues; i++) { 281 is_rx_queue = false; 282 /* balance core load by alternating rx and tx assignments 283 * ex: TX0 -> RX0 -> TX1 -> RX1 etc. 284 */ 285 if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) { 286 queue = rxqs[i_rxqs++]; 287 is_rx_queue = true; 288 } else { 289 queue = txqs[i_txqs++]; 290 } 291 292 rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, 293 stride); 294 if (rc) 295 goto out; 296 297 if (!queue || is_rx_queue) 298 continue; 299 300 rc = __netif_set_xps_queue(adapter->netdev, 301 cpumask_bits(queue->affinity_mask), 302 i_txqs - 1, XPS_CPUS); 303 if (rc) 304 netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n", 305 __func__, i_txqs - 1, rc); 306 } 307 308 out: 309 if (rc) { 310 netdev_warn(adapter->netdev, 311 "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n", 312 __func__, queue, queue->irq, rc); 313 ibmvnic_clean_affinity(adapter); 314 } 315 } 316 317 static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node) 318 { 319 struct ibmvnic_adapter *adapter; 320 321 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 322 ibmvnic_set_affinity(adapter); 323 return 0; 324 } 325 326 static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node) 327 { 328 struct ibmvnic_adapter *adapter; 329 330 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead); 331 ibmvnic_set_affinity(adapter); 332 return 0; 333 } 334 335 static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node) 336 { 337 struct ibmvnic_adapter *adapter; 338 339 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 340 ibmvnic_clean_affinity(adapter); 341 return 0; 342 } 343 344 static enum cpuhp_state ibmvnic_online; 345 346 static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter) 347 { 348 int ret; 349 350 ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node); 351 if (ret) 352 return ret; 353 ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD, 354 &adapter->node_dead); 355 if (!ret) 356 return ret; 357 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 358 return ret; 359 } 360 361 static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter) 362 { 363 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 364 cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD, 365 &adapter->node_dead); 366 } 367 368 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 369 unsigned long length, unsigned long *number, 370 unsigned long *irq) 371 { 372 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 373 long rc; 374 375 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 376 *number = retbuf[0]; 377 *irq = retbuf[1]; 378 379 return rc; 380 } 381 382 /** 383 * ibmvnic_wait_for_completion - Check device state and wait for completion 384 * @adapter: private device data 385 * @comp_done: completion structure to wait for 386 * @timeout: time to wait in milliseconds 387 * 388 * Wait for a completion signal or until the timeout limit is reached 389 * while checking that the device is still active. 390 */ 391 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 392 struct completion *comp_done, 393 unsigned long timeout) 394 { 395 struct net_device *netdev; 396 unsigned long div_timeout; 397 u8 retry; 398 399 netdev = adapter->netdev; 400 retry = 5; 401 div_timeout = msecs_to_jiffies(timeout / retry); 402 while (true) { 403 if (!adapter->crq.active) { 404 netdev_err(netdev, "Device down!\n"); 405 return -ENODEV; 406 } 407 if (!retry--) 408 break; 409 if (wait_for_completion_timeout(comp_done, div_timeout)) 410 return 0; 411 } 412 netdev_err(netdev, "Operation timed out.\n"); 413 return -ETIMEDOUT; 414 } 415 416 /** 417 * reuse_ltb() - Check if a long term buffer can be reused 418 * @ltb: The long term buffer to be checked 419 * @size: The size of the long term buffer. 420 * 421 * An LTB can be reused unless its size has changed. 422 * 423 * Return: Return true if the LTB can be reused, false otherwise. 424 */ 425 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 426 { 427 return (ltb->buff && ltb->size == size); 428 } 429 430 /** 431 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 432 * 433 * @adapter: ibmvnic adapter associated to the LTB 434 * @ltb: container object for the LTB 435 * @size: size of the LTB 436 * 437 * Allocate an LTB of the specified size and notify VIOS. 438 * 439 * If the given @ltb already has the correct size, reuse it. Otherwise if 440 * its non-NULL, free it. Then allocate a new one of the correct size. 441 * Notify the VIOS either way since we may now be working with a new VIOS. 442 * 443 * Allocating larger chunks of memory during resets, specially LPM or under 444 * low memory situations can cause resets to fail/timeout and for LPAR to 445 * lose connectivity. So hold onto the LTB even if we fail to communicate 446 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 447 * 448 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 449 * a negative value otherwise. 450 */ 451 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 452 struct ibmvnic_long_term_buff *ltb, int size) 453 { 454 struct device *dev = &adapter->vdev->dev; 455 u64 prev = 0; 456 int rc; 457 458 if (!reuse_ltb(ltb, size)) { 459 dev_dbg(dev, 460 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 461 ltb->size, size); 462 prev = ltb->size; 463 free_long_term_buff(adapter, ltb); 464 } 465 466 if (ltb->buff) { 467 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 468 ltb->map_id, ltb->size); 469 } else { 470 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 471 GFP_KERNEL); 472 if (!ltb->buff) { 473 dev_err(dev, "Couldn't alloc long term buffer\n"); 474 return -ENOMEM; 475 } 476 ltb->size = size; 477 478 ltb->map_id = find_first_zero_bit(adapter->map_ids, 479 MAX_MAP_ID); 480 bitmap_set(adapter->map_ids, ltb->map_id, 1); 481 482 dev_dbg(dev, 483 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", 484 ltb->map_id, ltb->size, prev); 485 } 486 487 /* Ensure ltb is zeroed - specially when reusing it. */ 488 memset(ltb->buff, 0, ltb->size); 489 490 mutex_lock(&adapter->fw_lock); 491 adapter->fw_done_rc = 0; 492 reinit_completion(&adapter->fw_done); 493 494 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 495 if (rc) { 496 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 497 goto out; 498 } 499 500 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 501 if (rc) { 502 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 503 rc); 504 goto out; 505 } 506 507 if (adapter->fw_done_rc) { 508 dev_err(dev, "Couldn't map LTB, rc = %d\n", 509 adapter->fw_done_rc); 510 rc = -EIO; 511 goto out; 512 } 513 rc = 0; 514 out: 515 /* don't free LTB on communication error - see function header */ 516 mutex_unlock(&adapter->fw_lock); 517 return rc; 518 } 519 520 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 521 struct ibmvnic_long_term_buff *ltb) 522 { 523 struct device *dev = &adapter->vdev->dev; 524 525 if (!ltb->buff) 526 return; 527 528 /* VIOS automatically unmaps the long term buffer at remote 529 * end for the following resets: 530 * FAILOVER, MOBILITY, TIMEOUT. 531 */ 532 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 533 adapter->reset_reason != VNIC_RESET_MOBILITY && 534 adapter->reset_reason != VNIC_RESET_TIMEOUT) 535 send_request_unmap(adapter, ltb->map_id); 536 537 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 538 539 ltb->buff = NULL; 540 /* mark this map_id free */ 541 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 542 ltb->map_id = 0; 543 } 544 545 /** 546 * free_ltb_set - free the given set of long term buffers (LTBS) 547 * @adapter: The ibmvnic adapter containing this ltb set 548 * @ltb_set: The ltb_set to be freed 549 * 550 * Free the set of LTBs in the given set. 551 */ 552 553 static void free_ltb_set(struct ibmvnic_adapter *adapter, 554 struct ibmvnic_ltb_set *ltb_set) 555 { 556 int i; 557 558 for (i = 0; i < ltb_set->num_ltbs; i++) 559 free_long_term_buff(adapter, <b_set->ltbs[i]); 560 561 kfree(ltb_set->ltbs); 562 ltb_set->ltbs = NULL; 563 ltb_set->num_ltbs = 0; 564 } 565 566 /** 567 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) 568 * 569 * @adapter: ibmvnic adapter associated to the LTB 570 * @ltb_set: container object for the set of LTBs 571 * @num_buffs: Number of buffers in the LTB 572 * @buff_size: Size of each buffer in the LTB 573 * 574 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size 575 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the 576 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. 577 * If new set needs more than in old set, allocate the remaining ones. 578 * Try and reuse as many LTBs as possible and avoid reallocation. 579 * 580 * Any changes to this allocation strategy must be reflected in 581 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). 582 */ 583 static int alloc_ltb_set(struct ibmvnic_adapter *adapter, 584 struct ibmvnic_ltb_set *ltb_set, int num_buffs, 585 int buff_size) 586 { 587 struct device *dev = &adapter->vdev->dev; 588 struct ibmvnic_ltb_set old_set; 589 struct ibmvnic_ltb_set new_set; 590 int rem_size; 591 int tot_size; /* size of all ltbs */ 592 int ltb_size; /* size of one ltb */ 593 int nltbs; 594 int rc; 595 int n; 596 int i; 597 598 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, 599 buff_size); 600 601 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); 602 tot_size = num_buffs * buff_size; 603 604 if (ltb_size > tot_size) 605 ltb_size = tot_size; 606 607 nltbs = tot_size / ltb_size; 608 if (tot_size % ltb_size) 609 nltbs++; 610 611 old_set = *ltb_set; 612 613 if (old_set.num_ltbs == nltbs) { 614 new_set = old_set; 615 } else { 616 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); 617 618 new_set.ltbs = kzalloc(tmp, GFP_KERNEL); 619 if (!new_set.ltbs) 620 return -ENOMEM; 621 622 new_set.num_ltbs = nltbs; 623 624 /* Free any excess ltbs in old set */ 625 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) 626 free_long_term_buff(adapter, &old_set.ltbs[i]); 627 628 /* Copy remaining ltbs to new set. All LTBs except the 629 * last one are of the same size. alloc_long_term_buff() 630 * will realloc if the size changes. 631 */ 632 n = min(old_set.num_ltbs, new_set.num_ltbs); 633 for (i = 0; i < n; i++) 634 new_set.ltbs[i] = old_set.ltbs[i]; 635 636 /* Any additional ltbs in new set will have NULL ltbs for 637 * now and will be allocated in alloc_long_term_buff(). 638 */ 639 640 /* We no longer need the old_set so free it. Note that we 641 * may have reused some ltbs from old set and freed excess 642 * ltbs above. So we only need to free the container now 643 * not the LTBs themselves. (i.e. dont free_ltb_set()!) 644 */ 645 kfree(old_set.ltbs); 646 old_set.ltbs = NULL; 647 old_set.num_ltbs = 0; 648 649 /* Install the new set. If allocations fail below, we will 650 * retry later and know what size LTBs we need. 651 */ 652 *ltb_set = new_set; 653 } 654 655 i = 0; 656 rem_size = tot_size; 657 while (rem_size) { 658 if (ltb_size > rem_size) 659 ltb_size = rem_size; 660 661 rem_size -= ltb_size; 662 663 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); 664 if (rc) 665 goto out; 666 i++; 667 } 668 669 WARN_ON(i != new_set.num_ltbs); 670 671 return 0; 672 out: 673 /* We may have allocated one/more LTBs before failing and we 674 * want to try and reuse on next reset. So don't free ltb set. 675 */ 676 return rc; 677 } 678 679 /** 680 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. 681 * @rxpool: The receive buffer pool containing buffer 682 * @bufidx: Index of buffer in rxpool 683 * @ltbp: (Output) pointer to the long term buffer containing the buffer 684 * @offset: (Output) offset of buffer in the LTB from @ltbp 685 * 686 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the 687 * pool and its corresponding offset. Assume for now that each LTB is of 688 * different size but could possibly be optimized based on the allocation 689 * strategy in alloc_ltb_set(). 690 */ 691 static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, 692 unsigned int bufidx, 693 struct ibmvnic_long_term_buff **ltbp, 694 unsigned int *offset) 695 { 696 struct ibmvnic_long_term_buff *ltb; 697 int nbufs; /* # of buffers in one ltb */ 698 int i; 699 700 WARN_ON(bufidx >= rxpool->size); 701 702 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { 703 ltb = &rxpool->ltb_set.ltbs[i]; 704 nbufs = ltb->size / rxpool->buff_size; 705 if (bufidx < nbufs) 706 break; 707 bufidx -= nbufs; 708 } 709 710 *ltbp = ltb; 711 *offset = bufidx * rxpool->buff_size; 712 } 713 714 /** 715 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. 716 * @txpool: The transmit buffer pool containing buffer 717 * @bufidx: Index of buffer in txpool 718 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer 719 * @offset: (Output) offset of buffer in the LTB from @ltbp 720 * 721 * Map the given buffer identified by [txpool, bufidx] to an LTB in the 722 * pool and its corresponding offset. 723 */ 724 static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, 725 unsigned int bufidx, 726 struct ibmvnic_long_term_buff **ltbp, 727 unsigned int *offset) 728 { 729 struct ibmvnic_long_term_buff *ltb; 730 int nbufs; /* # of buffers in one ltb */ 731 int i; 732 733 WARN_ON_ONCE(bufidx >= txpool->num_buffers); 734 735 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { 736 ltb = &txpool->ltb_set.ltbs[i]; 737 nbufs = ltb->size / txpool->buf_size; 738 if (bufidx < nbufs) 739 break; 740 bufidx -= nbufs; 741 } 742 743 *ltbp = ltb; 744 *offset = bufidx * txpool->buf_size; 745 } 746 747 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 748 { 749 int i; 750 751 for (i = 0; i < adapter->num_active_rx_pools; i++) 752 adapter->rx_pool[i].active = 0; 753 } 754 755 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 756 struct ibmvnic_rx_pool *pool) 757 { 758 int count = pool->size - atomic_read(&pool->available); 759 u64 handle = adapter->rx_scrq[pool->index]->handle; 760 struct device *dev = &adapter->vdev->dev; 761 struct ibmvnic_ind_xmit_queue *ind_bufp; 762 struct ibmvnic_sub_crq_queue *rx_scrq; 763 struct ibmvnic_long_term_buff *ltb; 764 union sub_crq *sub_crq; 765 int buffers_added = 0; 766 unsigned long lpar_rc; 767 struct sk_buff *skb; 768 unsigned int offset; 769 dma_addr_t dma_addr; 770 unsigned char *dst; 771 int shift = 0; 772 int bufidx; 773 int i; 774 775 if (!pool->active) 776 return; 777 778 rx_scrq = adapter->rx_scrq[pool->index]; 779 ind_bufp = &rx_scrq->ind_buf; 780 781 /* netdev_skb_alloc() could have failed after we saved a few skbs 782 * in the indir_buf and we would not have sent them to VIOS yet. 783 * To account for them, start the loop at ind_bufp->index rather 784 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 785 * be 0. 786 */ 787 for (i = ind_bufp->index; i < count; ++i) { 788 bufidx = pool->free_map[pool->next_free]; 789 790 /* We maybe reusing the skb from earlier resets. Allocate 791 * only if necessary. But since the LTB may have changed 792 * during reset (see init_rx_pools()), update LTB below 793 * even if reusing skb. 794 */ 795 skb = pool->rx_buff[bufidx].skb; 796 if (!skb) { 797 skb = netdev_alloc_skb(adapter->netdev, 798 pool->buff_size); 799 if (!skb) { 800 dev_err(dev, "Couldn't replenish rx buff\n"); 801 adapter->replenish_no_mem++; 802 break; 803 } 804 } 805 806 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 807 pool->next_free = (pool->next_free + 1) % pool->size; 808 809 /* Copy the skb to the long term mapped DMA buffer */ 810 map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); 811 dst = ltb->buff + offset; 812 memset(dst, 0, pool->buff_size); 813 dma_addr = ltb->addr + offset; 814 815 /* add the skb to an rx_buff in the pool */ 816 pool->rx_buff[bufidx].data = dst; 817 pool->rx_buff[bufidx].dma = dma_addr; 818 pool->rx_buff[bufidx].skb = skb; 819 pool->rx_buff[bufidx].pool_index = pool->index; 820 pool->rx_buff[bufidx].size = pool->buff_size; 821 822 /* queue the rx_buff for the next send_subcrq_indirect */ 823 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 824 memset(sub_crq, 0, sizeof(*sub_crq)); 825 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 826 sub_crq->rx_add.correlator = 827 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 828 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 829 sub_crq->rx_add.map_id = ltb->map_id; 830 831 /* The length field of the sCRQ is defined to be 24 bits so the 832 * buffer size needs to be left shifted by a byte before it is 833 * converted to big endian to prevent the last byte from being 834 * truncated. 835 */ 836 #ifdef __LITTLE_ENDIAN__ 837 shift = 8; 838 #endif 839 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 840 841 /* if send_subcrq_indirect queue is full, flush to VIOS */ 842 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 843 i == count - 1) { 844 lpar_rc = 845 send_subcrq_indirect(adapter, handle, 846 (u64)ind_bufp->indir_dma, 847 (u64)ind_bufp->index); 848 if (lpar_rc != H_SUCCESS) 849 goto failure; 850 buffers_added += ind_bufp->index; 851 adapter->replenish_add_buff_success += ind_bufp->index; 852 ind_bufp->index = 0; 853 } 854 } 855 atomic_add(buffers_added, &pool->available); 856 return; 857 858 failure: 859 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 860 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 861 for (i = ind_bufp->index - 1; i >= 0; --i) { 862 struct ibmvnic_rx_buff *rx_buff; 863 864 pool->next_free = pool->next_free == 0 ? 865 pool->size - 1 : pool->next_free - 1; 866 sub_crq = &ind_bufp->indir_arr[i]; 867 rx_buff = (struct ibmvnic_rx_buff *) 868 be64_to_cpu(sub_crq->rx_add.correlator); 869 bufidx = (int)(rx_buff - pool->rx_buff); 870 pool->free_map[pool->next_free] = bufidx; 871 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 872 pool->rx_buff[bufidx].skb = NULL; 873 } 874 adapter->replenish_add_buff_failure += ind_bufp->index; 875 atomic_add(buffers_added, &pool->available); 876 ind_bufp->index = 0; 877 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 878 /* Disable buffer pool replenishment and report carrier off if 879 * queue is closed or pending failover. 880 * Firmware guarantees that a signal will be sent to the 881 * driver, triggering a reset. 882 */ 883 deactivate_rx_pools(adapter); 884 netif_carrier_off(adapter->netdev); 885 } 886 } 887 888 static void replenish_pools(struct ibmvnic_adapter *adapter) 889 { 890 int i; 891 892 adapter->replenish_task_cycles++; 893 for (i = 0; i < adapter->num_active_rx_pools; i++) { 894 if (adapter->rx_pool[i].active) 895 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 896 } 897 898 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 899 } 900 901 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 902 { 903 kfree(adapter->tx_stats_buffers); 904 kfree(adapter->rx_stats_buffers); 905 adapter->tx_stats_buffers = NULL; 906 adapter->rx_stats_buffers = NULL; 907 } 908 909 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 910 { 911 adapter->tx_stats_buffers = 912 kcalloc(IBMVNIC_MAX_QUEUES, 913 sizeof(struct ibmvnic_tx_queue_stats), 914 GFP_KERNEL); 915 if (!adapter->tx_stats_buffers) 916 return -ENOMEM; 917 918 adapter->rx_stats_buffers = 919 kcalloc(IBMVNIC_MAX_QUEUES, 920 sizeof(struct ibmvnic_rx_queue_stats), 921 GFP_KERNEL); 922 if (!adapter->rx_stats_buffers) 923 return -ENOMEM; 924 925 return 0; 926 } 927 928 static void release_stats_token(struct ibmvnic_adapter *adapter) 929 { 930 struct device *dev = &adapter->vdev->dev; 931 932 if (!adapter->stats_token) 933 return; 934 935 dma_unmap_single(dev, adapter->stats_token, 936 sizeof(struct ibmvnic_statistics), 937 DMA_FROM_DEVICE); 938 adapter->stats_token = 0; 939 } 940 941 static int init_stats_token(struct ibmvnic_adapter *adapter) 942 { 943 struct device *dev = &adapter->vdev->dev; 944 dma_addr_t stok; 945 int rc; 946 947 stok = dma_map_single(dev, &adapter->stats, 948 sizeof(struct ibmvnic_statistics), 949 DMA_FROM_DEVICE); 950 rc = dma_mapping_error(dev, stok); 951 if (rc) { 952 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 953 return rc; 954 } 955 956 adapter->stats_token = stok; 957 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 958 return 0; 959 } 960 961 /** 962 * release_rx_pools() - Release any rx pools attached to @adapter. 963 * @adapter: ibmvnic adapter 964 * 965 * Safe to call this multiple times - even if no pools are attached. 966 */ 967 static void release_rx_pools(struct ibmvnic_adapter *adapter) 968 { 969 struct ibmvnic_rx_pool *rx_pool; 970 int i, j; 971 972 if (!adapter->rx_pool) 973 return; 974 975 for (i = 0; i < adapter->num_active_rx_pools; i++) { 976 rx_pool = &adapter->rx_pool[i]; 977 978 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 979 980 kfree(rx_pool->free_map); 981 982 free_ltb_set(adapter, &rx_pool->ltb_set); 983 984 if (!rx_pool->rx_buff) 985 continue; 986 987 for (j = 0; j < rx_pool->size; j++) { 988 if (rx_pool->rx_buff[j].skb) { 989 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 990 rx_pool->rx_buff[j].skb = NULL; 991 } 992 } 993 994 kfree(rx_pool->rx_buff); 995 } 996 997 kfree(adapter->rx_pool); 998 adapter->rx_pool = NULL; 999 adapter->num_active_rx_pools = 0; 1000 adapter->prev_rx_pool_size = 0; 1001 } 1002 1003 /** 1004 * reuse_rx_pools() - Check if the existing rx pools can be reused. 1005 * @adapter: ibmvnic adapter 1006 * 1007 * Check if the existing rx pools in the adapter can be reused. The 1008 * pools can be reused if the pool parameters (number of pools, 1009 * number of buffers in the pool and size of each buffer) have not 1010 * changed. 1011 * 1012 * NOTE: This assumes that all pools have the same number of buffers 1013 * which is the case currently. If that changes, we must fix this. 1014 * 1015 * Return: true if the rx pools can be reused, false otherwise. 1016 */ 1017 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 1018 { 1019 u64 old_num_pools, new_num_pools; 1020 u64 old_pool_size, new_pool_size; 1021 u64 old_buff_size, new_buff_size; 1022 1023 if (!adapter->rx_pool) 1024 return false; 1025 1026 old_num_pools = adapter->num_active_rx_pools; 1027 new_num_pools = adapter->req_rx_queues; 1028 1029 old_pool_size = adapter->prev_rx_pool_size; 1030 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 1031 1032 old_buff_size = adapter->prev_rx_buf_sz; 1033 new_buff_size = adapter->cur_rx_buf_sz; 1034 1035 if (old_buff_size != new_buff_size || 1036 old_num_pools != new_num_pools || 1037 old_pool_size != new_pool_size) 1038 return false; 1039 1040 return true; 1041 } 1042 1043 /** 1044 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 1045 * @netdev: net device associated with the vnic interface 1046 * 1047 * Initialize the set of receiver pools in the ibmvnic adapter associated 1048 * with the net_device @netdev. If possible, reuse the existing rx pools. 1049 * Otherwise free any existing pools and allocate a new set of pools 1050 * before initializing them. 1051 * 1052 * Return: 0 on success and negative value on error. 1053 */ 1054 static int init_rx_pools(struct net_device *netdev) 1055 { 1056 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1057 struct device *dev = &adapter->vdev->dev; 1058 struct ibmvnic_rx_pool *rx_pool; 1059 u64 num_pools; 1060 u64 pool_size; /* # of buffers in one pool */ 1061 u64 buff_size; 1062 int i, j, rc; 1063 1064 pool_size = adapter->req_rx_add_entries_per_subcrq; 1065 num_pools = adapter->req_rx_queues; 1066 buff_size = adapter->cur_rx_buf_sz; 1067 1068 if (reuse_rx_pools(adapter)) { 1069 dev_dbg(dev, "Reusing rx pools\n"); 1070 goto update_ltb; 1071 } 1072 1073 /* Allocate/populate the pools. */ 1074 release_rx_pools(adapter); 1075 1076 adapter->rx_pool = kcalloc(num_pools, 1077 sizeof(struct ibmvnic_rx_pool), 1078 GFP_KERNEL); 1079 if (!adapter->rx_pool) { 1080 dev_err(dev, "Failed to allocate rx pools\n"); 1081 return -ENOMEM; 1082 } 1083 1084 /* Set num_active_rx_pools early. If we fail below after partial 1085 * allocation, release_rx_pools() will know how many to look for. 1086 */ 1087 adapter->num_active_rx_pools = num_pools; 1088 1089 for (i = 0; i < num_pools; i++) { 1090 rx_pool = &adapter->rx_pool[i]; 1091 1092 netdev_dbg(adapter->netdev, 1093 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 1094 i, pool_size, buff_size); 1095 1096 rx_pool->size = pool_size; 1097 rx_pool->index = i; 1098 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1099 1100 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 1101 GFP_KERNEL); 1102 if (!rx_pool->free_map) { 1103 dev_err(dev, "Couldn't alloc free_map %d\n", i); 1104 rc = -ENOMEM; 1105 goto out_release; 1106 } 1107 1108 rx_pool->rx_buff = kcalloc(rx_pool->size, 1109 sizeof(struct ibmvnic_rx_buff), 1110 GFP_KERNEL); 1111 if (!rx_pool->rx_buff) { 1112 dev_err(dev, "Couldn't alloc rx buffers\n"); 1113 rc = -ENOMEM; 1114 goto out_release; 1115 } 1116 } 1117 1118 adapter->prev_rx_pool_size = pool_size; 1119 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 1120 1121 update_ltb: 1122 for (i = 0; i < num_pools; i++) { 1123 rx_pool = &adapter->rx_pool[i]; 1124 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 1125 i, rx_pool->size, rx_pool->buff_size); 1126 1127 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, 1128 rx_pool->size, rx_pool->buff_size); 1129 if (rc) 1130 goto out; 1131 1132 for (j = 0; j < rx_pool->size; ++j) { 1133 struct ibmvnic_rx_buff *rx_buff; 1134 1135 rx_pool->free_map[j] = j; 1136 1137 /* NOTE: Don't clear rx_buff->skb here - will leak 1138 * memory! replenish_rx_pool() will reuse skbs or 1139 * allocate as necessary. 1140 */ 1141 rx_buff = &rx_pool->rx_buff[j]; 1142 rx_buff->dma = 0; 1143 rx_buff->data = 0; 1144 rx_buff->size = 0; 1145 rx_buff->pool_index = 0; 1146 } 1147 1148 /* Mark pool "empty" so replenish_rx_pools() will 1149 * update the LTB info for each buffer 1150 */ 1151 atomic_set(&rx_pool->available, 0); 1152 rx_pool->next_alloc = 0; 1153 rx_pool->next_free = 0; 1154 /* replenish_rx_pool() may have called deactivate_rx_pools() 1155 * on failover. Ensure pool is active now. 1156 */ 1157 rx_pool->active = 1; 1158 } 1159 return 0; 1160 out_release: 1161 release_rx_pools(adapter); 1162 out: 1163 /* We failed to allocate one or more LTBs or map them on the VIOS. 1164 * Hold onto the pools and any LTBs that we did allocate/map. 1165 */ 1166 return rc; 1167 } 1168 1169 static void release_vpd_data(struct ibmvnic_adapter *adapter) 1170 { 1171 if (!adapter->vpd) 1172 return; 1173 1174 kfree(adapter->vpd->buff); 1175 kfree(adapter->vpd); 1176 1177 adapter->vpd = NULL; 1178 } 1179 1180 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 1181 struct ibmvnic_tx_pool *tx_pool) 1182 { 1183 kfree(tx_pool->tx_buff); 1184 kfree(tx_pool->free_map); 1185 free_ltb_set(adapter, &tx_pool->ltb_set); 1186 } 1187 1188 /** 1189 * release_tx_pools() - Release any tx pools attached to @adapter. 1190 * @adapter: ibmvnic adapter 1191 * 1192 * Safe to call this multiple times - even if no pools are attached. 1193 */ 1194 static void release_tx_pools(struct ibmvnic_adapter *adapter) 1195 { 1196 int i; 1197 1198 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 1199 * both NULL or both non-NULL. So we only need to check one. 1200 */ 1201 if (!adapter->tx_pool) 1202 return; 1203 1204 for (i = 0; i < adapter->num_active_tx_pools; i++) { 1205 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 1206 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 1207 } 1208 1209 kfree(adapter->tx_pool); 1210 adapter->tx_pool = NULL; 1211 kfree(adapter->tso_pool); 1212 adapter->tso_pool = NULL; 1213 adapter->num_active_tx_pools = 0; 1214 adapter->prev_tx_pool_size = 0; 1215 } 1216 1217 static int init_one_tx_pool(struct net_device *netdev, 1218 struct ibmvnic_tx_pool *tx_pool, 1219 int pool_size, int buf_size) 1220 { 1221 int i; 1222 1223 tx_pool->tx_buff = kcalloc(pool_size, 1224 sizeof(struct ibmvnic_tx_buff), 1225 GFP_KERNEL); 1226 if (!tx_pool->tx_buff) 1227 return -ENOMEM; 1228 1229 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 1230 if (!tx_pool->free_map) { 1231 kfree(tx_pool->tx_buff); 1232 tx_pool->tx_buff = NULL; 1233 return -ENOMEM; 1234 } 1235 1236 for (i = 0; i < pool_size; i++) 1237 tx_pool->free_map[i] = i; 1238 1239 tx_pool->consumer_index = 0; 1240 tx_pool->producer_index = 0; 1241 tx_pool->num_buffers = pool_size; 1242 tx_pool->buf_size = buf_size; 1243 1244 return 0; 1245 } 1246 1247 /** 1248 * reuse_tx_pools() - Check if the existing tx pools can be reused. 1249 * @adapter: ibmvnic adapter 1250 * 1251 * Check if the existing tx pools in the adapter can be reused. The 1252 * pools can be reused if the pool parameters (number of pools, 1253 * number of buffers in the pool and mtu) have not changed. 1254 * 1255 * NOTE: This assumes that all pools have the same number of buffers 1256 * which is the case currently. If that changes, we must fix this. 1257 * 1258 * Return: true if the tx pools can be reused, false otherwise. 1259 */ 1260 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 1261 { 1262 u64 old_num_pools, new_num_pools; 1263 u64 old_pool_size, new_pool_size; 1264 u64 old_mtu, new_mtu; 1265 1266 if (!adapter->tx_pool) 1267 return false; 1268 1269 old_num_pools = adapter->num_active_tx_pools; 1270 new_num_pools = adapter->num_active_tx_scrqs; 1271 old_pool_size = adapter->prev_tx_pool_size; 1272 new_pool_size = adapter->req_tx_entries_per_subcrq; 1273 old_mtu = adapter->prev_mtu; 1274 new_mtu = adapter->req_mtu; 1275 1276 if (old_mtu != new_mtu || 1277 old_num_pools != new_num_pools || 1278 old_pool_size != new_pool_size) 1279 return false; 1280 1281 return true; 1282 } 1283 1284 /** 1285 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 1286 * @netdev: net device associated with the vnic interface 1287 * 1288 * Initialize the set of transmit pools in the ibmvnic adapter associated 1289 * with the net_device @netdev. If possible, reuse the existing tx pools. 1290 * Otherwise free any existing pools and allocate a new set of pools 1291 * before initializing them. 1292 * 1293 * Return: 0 on success and negative value on error. 1294 */ 1295 static int init_tx_pools(struct net_device *netdev) 1296 { 1297 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1298 struct device *dev = &adapter->vdev->dev; 1299 int num_pools; 1300 u64 pool_size; /* # of buffers in pool */ 1301 u64 buff_size; 1302 int i, j, rc; 1303 1304 num_pools = adapter->req_tx_queues; 1305 1306 /* We must notify the VIOS about the LTB on all resets - but we only 1307 * need to alloc/populate pools if either the number of buffers or 1308 * size of each buffer in the pool has changed. 1309 */ 1310 if (reuse_tx_pools(adapter)) { 1311 netdev_dbg(netdev, "Reusing tx pools\n"); 1312 goto update_ltb; 1313 } 1314 1315 /* Allocate/populate the pools. */ 1316 release_tx_pools(adapter); 1317 1318 pool_size = adapter->req_tx_entries_per_subcrq; 1319 num_pools = adapter->num_active_tx_scrqs; 1320 1321 adapter->tx_pool = kcalloc(num_pools, 1322 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1323 if (!adapter->tx_pool) 1324 return -ENOMEM; 1325 1326 adapter->tso_pool = kcalloc(num_pools, 1327 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1328 /* To simplify release_tx_pools() ensure that ->tx_pool and 1329 * ->tso_pool are either both NULL or both non-NULL. 1330 */ 1331 if (!adapter->tso_pool) { 1332 kfree(adapter->tx_pool); 1333 adapter->tx_pool = NULL; 1334 return -ENOMEM; 1335 } 1336 1337 /* Set num_active_tx_pools early. If we fail below after partial 1338 * allocation, release_tx_pools() will know how many to look for. 1339 */ 1340 adapter->num_active_tx_pools = num_pools; 1341 1342 buff_size = adapter->req_mtu + VLAN_HLEN; 1343 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1344 1345 for (i = 0; i < num_pools; i++) { 1346 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 1347 i, adapter->req_tx_entries_per_subcrq, buff_size); 1348 1349 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 1350 pool_size, buff_size); 1351 if (rc) 1352 goto out_release; 1353 1354 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 1355 IBMVNIC_TSO_BUFS, 1356 IBMVNIC_TSO_BUF_SZ); 1357 if (rc) 1358 goto out_release; 1359 } 1360 1361 adapter->prev_tx_pool_size = pool_size; 1362 adapter->prev_mtu = adapter->req_mtu; 1363 1364 update_ltb: 1365 /* NOTE: All tx_pools have the same number of buffers (which is 1366 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 1367 * buffers (see calls init_one_tx_pool() for these). 1368 * For consistency, we use tx_pool->num_buffers and 1369 * tso_pool->num_buffers below. 1370 */ 1371 rc = -1; 1372 for (i = 0; i < num_pools; i++) { 1373 struct ibmvnic_tx_pool *tso_pool; 1374 struct ibmvnic_tx_pool *tx_pool; 1375 1376 tx_pool = &adapter->tx_pool[i]; 1377 1378 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", 1379 i, tx_pool->num_buffers, tx_pool->buf_size); 1380 1381 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, 1382 tx_pool->num_buffers, tx_pool->buf_size); 1383 if (rc) 1384 goto out; 1385 1386 tx_pool->consumer_index = 0; 1387 tx_pool->producer_index = 0; 1388 1389 for (j = 0; j < tx_pool->num_buffers; j++) 1390 tx_pool->free_map[j] = j; 1391 1392 tso_pool = &adapter->tso_pool[i]; 1393 1394 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", 1395 i, tso_pool->num_buffers, tso_pool->buf_size); 1396 1397 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, 1398 tso_pool->num_buffers, tso_pool->buf_size); 1399 if (rc) 1400 goto out; 1401 1402 tso_pool->consumer_index = 0; 1403 tso_pool->producer_index = 0; 1404 1405 for (j = 0; j < tso_pool->num_buffers; j++) 1406 tso_pool->free_map[j] = j; 1407 } 1408 1409 return 0; 1410 out_release: 1411 release_tx_pools(adapter); 1412 out: 1413 /* We failed to allocate one or more LTBs or map them on the VIOS. 1414 * Hold onto the pools and any LTBs that we did allocate/map. 1415 */ 1416 return rc; 1417 } 1418 1419 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1420 { 1421 int i; 1422 1423 if (adapter->napi_enabled) 1424 return; 1425 1426 for (i = 0; i < adapter->req_rx_queues; i++) 1427 napi_enable(&adapter->napi[i]); 1428 1429 adapter->napi_enabled = true; 1430 } 1431 1432 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1433 { 1434 int i; 1435 1436 if (!adapter->napi_enabled) 1437 return; 1438 1439 for (i = 0; i < adapter->req_rx_queues; i++) { 1440 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1441 napi_disable(&adapter->napi[i]); 1442 } 1443 1444 adapter->napi_enabled = false; 1445 } 1446 1447 static int init_napi(struct ibmvnic_adapter *adapter) 1448 { 1449 int i; 1450 1451 adapter->napi = kcalloc(adapter->req_rx_queues, 1452 sizeof(struct napi_struct), GFP_KERNEL); 1453 if (!adapter->napi) 1454 return -ENOMEM; 1455 1456 for (i = 0; i < adapter->req_rx_queues; i++) { 1457 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1458 netif_napi_add(adapter->netdev, &adapter->napi[i], 1459 ibmvnic_poll); 1460 } 1461 1462 adapter->num_active_rx_napi = adapter->req_rx_queues; 1463 return 0; 1464 } 1465 1466 static void release_napi(struct ibmvnic_adapter *adapter) 1467 { 1468 int i; 1469 1470 if (!adapter->napi) 1471 return; 1472 1473 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1474 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1475 netif_napi_del(&adapter->napi[i]); 1476 } 1477 1478 kfree(adapter->napi); 1479 adapter->napi = NULL; 1480 adapter->num_active_rx_napi = 0; 1481 adapter->napi_enabled = false; 1482 } 1483 1484 static const char *adapter_state_to_string(enum vnic_state state) 1485 { 1486 switch (state) { 1487 case VNIC_PROBING: 1488 return "PROBING"; 1489 case VNIC_PROBED: 1490 return "PROBED"; 1491 case VNIC_OPENING: 1492 return "OPENING"; 1493 case VNIC_OPEN: 1494 return "OPEN"; 1495 case VNIC_CLOSING: 1496 return "CLOSING"; 1497 case VNIC_CLOSED: 1498 return "CLOSED"; 1499 case VNIC_REMOVING: 1500 return "REMOVING"; 1501 case VNIC_REMOVED: 1502 return "REMOVED"; 1503 case VNIC_DOWN: 1504 return "DOWN"; 1505 } 1506 return "UNKNOWN"; 1507 } 1508 1509 static int ibmvnic_login(struct net_device *netdev) 1510 { 1511 unsigned long flags, timeout = msecs_to_jiffies(20000); 1512 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1513 int retry_count = 0; 1514 int retries = 10; 1515 bool retry; 1516 int rc; 1517 1518 do { 1519 retry = false; 1520 if (retry_count > retries) { 1521 netdev_warn(netdev, "Login attempts exceeded\n"); 1522 return -EACCES; 1523 } 1524 1525 adapter->init_done_rc = 0; 1526 reinit_completion(&adapter->init_done); 1527 rc = send_login(adapter); 1528 if (rc) 1529 return rc; 1530 1531 if (!wait_for_completion_timeout(&adapter->init_done, 1532 timeout)) { 1533 netdev_warn(netdev, "Login timed out\n"); 1534 adapter->login_pending = false; 1535 goto partial_reset; 1536 } 1537 1538 if (adapter->init_done_rc == ABORTED) { 1539 netdev_warn(netdev, "Login aborted, retrying...\n"); 1540 retry = true; 1541 adapter->init_done_rc = 0; 1542 retry_count++; 1543 /* FW or device may be busy, so 1544 * wait a bit before retrying login 1545 */ 1546 msleep(500); 1547 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1548 retry_count++; 1549 release_sub_crqs(adapter, 1); 1550 1551 retry = true; 1552 netdev_dbg(netdev, 1553 "Received partial success, retrying...\n"); 1554 adapter->init_done_rc = 0; 1555 reinit_completion(&adapter->init_done); 1556 send_query_cap(adapter); 1557 if (!wait_for_completion_timeout(&adapter->init_done, 1558 timeout)) { 1559 netdev_warn(netdev, 1560 "Capabilities query timed out\n"); 1561 return -ETIMEDOUT; 1562 } 1563 1564 rc = init_sub_crqs(adapter); 1565 if (rc) { 1566 netdev_warn(netdev, 1567 "SCRQ initialization failed\n"); 1568 return rc; 1569 } 1570 1571 rc = init_sub_crq_irqs(adapter); 1572 if (rc) { 1573 netdev_warn(netdev, 1574 "SCRQ irq initialization failed\n"); 1575 return rc; 1576 } 1577 /* Default/timeout error handling, reset and start fresh */ 1578 } else if (adapter->init_done_rc) { 1579 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1580 adapter->init_done_rc); 1581 1582 partial_reset: 1583 /* adapter login failed, so free any CRQs or sub-CRQs 1584 * and register again before attempting to login again. 1585 * If we don't do this then the VIOS may think that 1586 * we are already logged in and reject any subsequent 1587 * attempts 1588 */ 1589 netdev_warn(netdev, 1590 "Freeing and re-registering CRQs before attempting to login again\n"); 1591 retry = true; 1592 adapter->init_done_rc = 0; 1593 release_sub_crqs(adapter, true); 1594 /* Much of this is similar logic as ibmvnic_probe(), 1595 * we are essentially re-initializing communication 1596 * with the server. We really should not run any 1597 * resets/failovers here because this is already a form 1598 * of reset and we do not want parallel resets occurring 1599 */ 1600 do { 1601 reinit_init_done(adapter); 1602 /* Clear any failovers we got in the previous 1603 * pass since we are re-initializing the CRQ 1604 */ 1605 adapter->failover_pending = false; 1606 release_crq_queue(adapter); 1607 /* If we don't sleep here then we risk an 1608 * unnecessary failover event from the VIOS. 1609 * This is a known VIOS issue caused by a vnic 1610 * device freeing and registering a CRQ too 1611 * quickly. 1612 */ 1613 msleep(1500); 1614 /* Avoid any resets, since we are currently 1615 * resetting. 1616 */ 1617 spin_lock_irqsave(&adapter->rwi_lock, flags); 1618 flush_reset_queue(adapter); 1619 spin_unlock_irqrestore(&adapter->rwi_lock, 1620 flags); 1621 1622 rc = init_crq_queue(adapter); 1623 if (rc) { 1624 netdev_err(netdev, "login recovery: init CRQ failed %d\n", 1625 rc); 1626 return -EIO; 1627 } 1628 1629 rc = ibmvnic_reset_init(adapter, false); 1630 if (rc) 1631 netdev_err(netdev, "login recovery: Reset init failed %d\n", 1632 rc); 1633 /* IBMVNIC_CRQ_INIT will return EAGAIN if it 1634 * fails, since ibmvnic_reset_init will free 1635 * irq's in failure, we won't be able to receive 1636 * new CRQs so we need to keep trying. probe() 1637 * handles this similarly. 1638 */ 1639 } while (rc == -EAGAIN && retry_count++ < retries); 1640 } 1641 } while (retry); 1642 1643 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1644 1645 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1646 return 0; 1647 } 1648 1649 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1650 { 1651 if (!adapter->login_buf) 1652 return; 1653 1654 dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token, 1655 adapter->login_buf_sz, DMA_TO_DEVICE); 1656 kfree(adapter->login_buf); 1657 adapter->login_buf = NULL; 1658 } 1659 1660 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1661 { 1662 if (!adapter->login_rsp_buf) 1663 return; 1664 1665 dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token, 1666 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 1667 kfree(adapter->login_rsp_buf); 1668 adapter->login_rsp_buf = NULL; 1669 } 1670 1671 static void release_resources(struct ibmvnic_adapter *adapter) 1672 { 1673 release_vpd_data(adapter); 1674 1675 release_napi(adapter); 1676 release_login_buffer(adapter); 1677 release_login_rsp_buffer(adapter); 1678 } 1679 1680 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1681 { 1682 struct net_device *netdev = adapter->netdev; 1683 unsigned long timeout = msecs_to_jiffies(20000); 1684 union ibmvnic_crq crq; 1685 bool resend; 1686 int rc; 1687 1688 netdev_dbg(netdev, "setting link state %d\n", link_state); 1689 1690 memset(&crq, 0, sizeof(crq)); 1691 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1692 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1693 crq.logical_link_state.link_state = link_state; 1694 1695 do { 1696 resend = false; 1697 1698 reinit_completion(&adapter->init_done); 1699 rc = ibmvnic_send_crq(adapter, &crq); 1700 if (rc) { 1701 netdev_err(netdev, "Failed to set link state\n"); 1702 return rc; 1703 } 1704 1705 if (!wait_for_completion_timeout(&adapter->init_done, 1706 timeout)) { 1707 netdev_err(netdev, "timeout setting link state\n"); 1708 return -ETIMEDOUT; 1709 } 1710 1711 if (adapter->init_done_rc == PARTIALSUCCESS) { 1712 /* Partuial success, delay and re-send */ 1713 mdelay(1000); 1714 resend = true; 1715 } else if (adapter->init_done_rc) { 1716 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1717 adapter->init_done_rc); 1718 return adapter->init_done_rc; 1719 } 1720 } while (resend); 1721 1722 return 0; 1723 } 1724 1725 static int set_real_num_queues(struct net_device *netdev) 1726 { 1727 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1728 int rc; 1729 1730 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1731 adapter->req_tx_queues, adapter->req_rx_queues); 1732 1733 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1734 if (rc) { 1735 netdev_err(netdev, "failed to set the number of tx queues\n"); 1736 return rc; 1737 } 1738 1739 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1740 if (rc) 1741 netdev_err(netdev, "failed to set the number of rx queues\n"); 1742 1743 return rc; 1744 } 1745 1746 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1747 { 1748 struct device *dev = &adapter->vdev->dev; 1749 union ibmvnic_crq crq; 1750 int len = 0; 1751 int rc; 1752 1753 if (adapter->vpd->buff) 1754 len = adapter->vpd->len; 1755 1756 mutex_lock(&adapter->fw_lock); 1757 adapter->fw_done_rc = 0; 1758 reinit_completion(&adapter->fw_done); 1759 1760 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1761 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1762 rc = ibmvnic_send_crq(adapter, &crq); 1763 if (rc) { 1764 mutex_unlock(&adapter->fw_lock); 1765 return rc; 1766 } 1767 1768 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1769 if (rc) { 1770 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1771 mutex_unlock(&adapter->fw_lock); 1772 return rc; 1773 } 1774 mutex_unlock(&adapter->fw_lock); 1775 1776 if (!adapter->vpd->len) 1777 return -ENODATA; 1778 1779 if (!adapter->vpd->buff) 1780 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1781 else if (adapter->vpd->len != len) 1782 adapter->vpd->buff = 1783 krealloc(adapter->vpd->buff, 1784 adapter->vpd->len, GFP_KERNEL); 1785 1786 if (!adapter->vpd->buff) { 1787 dev_err(dev, "Could allocate VPD buffer\n"); 1788 return -ENOMEM; 1789 } 1790 1791 adapter->vpd->dma_addr = 1792 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1793 DMA_FROM_DEVICE); 1794 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1795 dev_err(dev, "Could not map VPD buffer\n"); 1796 kfree(adapter->vpd->buff); 1797 adapter->vpd->buff = NULL; 1798 return -ENOMEM; 1799 } 1800 1801 mutex_lock(&adapter->fw_lock); 1802 adapter->fw_done_rc = 0; 1803 reinit_completion(&adapter->fw_done); 1804 1805 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1806 crq.get_vpd.cmd = GET_VPD; 1807 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1808 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1809 rc = ibmvnic_send_crq(adapter, &crq); 1810 if (rc) { 1811 kfree(adapter->vpd->buff); 1812 adapter->vpd->buff = NULL; 1813 mutex_unlock(&adapter->fw_lock); 1814 return rc; 1815 } 1816 1817 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1818 if (rc) { 1819 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1820 kfree(adapter->vpd->buff); 1821 adapter->vpd->buff = NULL; 1822 mutex_unlock(&adapter->fw_lock); 1823 return rc; 1824 } 1825 1826 mutex_unlock(&adapter->fw_lock); 1827 return 0; 1828 } 1829 1830 static int init_resources(struct ibmvnic_adapter *adapter) 1831 { 1832 struct net_device *netdev = adapter->netdev; 1833 int rc; 1834 1835 rc = set_real_num_queues(netdev); 1836 if (rc) 1837 return rc; 1838 1839 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1840 if (!adapter->vpd) 1841 return -ENOMEM; 1842 1843 /* Vital Product Data (VPD) */ 1844 rc = ibmvnic_get_vpd(adapter); 1845 if (rc) { 1846 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1847 return rc; 1848 } 1849 1850 rc = init_napi(adapter); 1851 if (rc) 1852 return rc; 1853 1854 send_query_map(adapter); 1855 1856 rc = init_rx_pools(netdev); 1857 if (rc) 1858 return rc; 1859 1860 rc = init_tx_pools(netdev); 1861 return rc; 1862 } 1863 1864 static int __ibmvnic_open(struct net_device *netdev) 1865 { 1866 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1867 enum vnic_state prev_state = adapter->state; 1868 int i, rc; 1869 1870 adapter->state = VNIC_OPENING; 1871 replenish_pools(adapter); 1872 ibmvnic_napi_enable(adapter); 1873 1874 /* We're ready to receive frames, enable the sub-crq interrupts and 1875 * set the logical link state to up 1876 */ 1877 for (i = 0; i < adapter->req_rx_queues; i++) { 1878 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1879 if (prev_state == VNIC_CLOSED) 1880 enable_irq(adapter->rx_scrq[i]->irq); 1881 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1882 } 1883 1884 for (i = 0; i < adapter->req_tx_queues; i++) { 1885 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1886 if (prev_state == VNIC_CLOSED) 1887 enable_irq(adapter->tx_scrq[i]->irq); 1888 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1889 /* netdev_tx_reset_queue will reset dql stats. During NON_FATAL 1890 * resets, don't reset the stats because there could be batched 1891 * skb's waiting to be sent. If we reset dql stats, we risk 1892 * num_completed being greater than num_queued. This will cause 1893 * a BUG_ON in dql_completed(). 1894 */ 1895 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) 1896 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1897 } 1898 1899 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1900 if (rc) { 1901 ibmvnic_napi_disable(adapter); 1902 ibmvnic_disable_irqs(adapter); 1903 return rc; 1904 } 1905 1906 adapter->tx_queues_active = true; 1907 1908 /* Since queues were stopped until now, there shouldn't be any 1909 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1910 * don't need the synchronize_rcu()? Leaving it for consistency 1911 * with setting ->tx_queues_active = false. 1912 */ 1913 synchronize_rcu(); 1914 1915 netif_tx_start_all_queues(netdev); 1916 1917 if (prev_state == VNIC_CLOSED) { 1918 for (i = 0; i < adapter->req_rx_queues; i++) 1919 napi_schedule(&adapter->napi[i]); 1920 } 1921 1922 adapter->state = VNIC_OPEN; 1923 return rc; 1924 } 1925 1926 static int ibmvnic_open(struct net_device *netdev) 1927 { 1928 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1929 int rc; 1930 1931 ASSERT_RTNL(); 1932 1933 /* If device failover is pending or we are about to reset, just set 1934 * device state and return. Device operation will be handled by reset 1935 * routine. 1936 * 1937 * It should be safe to overwrite the adapter->state here. Since 1938 * we hold the rtnl, either the reset has not actually started or 1939 * the rtnl got dropped during the set_link_state() in do_reset(). 1940 * In the former case, no one else is changing the state (again we 1941 * have the rtnl) and in the latter case, do_reset() will detect and 1942 * honor our setting below. 1943 */ 1944 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1945 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1946 adapter_state_to_string(adapter->state), 1947 adapter->failover_pending); 1948 adapter->state = VNIC_OPEN; 1949 rc = 0; 1950 goto out; 1951 } 1952 1953 if (adapter->state != VNIC_CLOSED) { 1954 rc = ibmvnic_login(netdev); 1955 if (rc) 1956 goto out; 1957 1958 rc = init_resources(adapter); 1959 if (rc) { 1960 netdev_err(netdev, "failed to initialize resources\n"); 1961 goto out; 1962 } 1963 } 1964 1965 rc = __ibmvnic_open(netdev); 1966 1967 out: 1968 /* If open failed and there is a pending failover or in-progress reset, 1969 * set device state and return. Device operation will be handled by 1970 * reset routine. See also comments above regarding rtnl. 1971 */ 1972 if (rc && 1973 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1974 adapter->state = VNIC_OPEN; 1975 rc = 0; 1976 } 1977 1978 if (rc) { 1979 release_resources(adapter); 1980 release_rx_pools(adapter); 1981 release_tx_pools(adapter); 1982 } 1983 1984 return rc; 1985 } 1986 1987 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1988 { 1989 struct ibmvnic_rx_pool *rx_pool; 1990 struct ibmvnic_rx_buff *rx_buff; 1991 u64 rx_entries; 1992 int rx_scrqs; 1993 int i, j; 1994 1995 if (!adapter->rx_pool) 1996 return; 1997 1998 rx_scrqs = adapter->num_active_rx_pools; 1999 rx_entries = adapter->req_rx_add_entries_per_subcrq; 2000 2001 /* Free any remaining skbs in the rx buffer pools */ 2002 for (i = 0; i < rx_scrqs; i++) { 2003 rx_pool = &adapter->rx_pool[i]; 2004 if (!rx_pool || !rx_pool->rx_buff) 2005 continue; 2006 2007 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 2008 for (j = 0; j < rx_entries; j++) { 2009 rx_buff = &rx_pool->rx_buff[j]; 2010 if (rx_buff && rx_buff->skb) { 2011 dev_kfree_skb_any(rx_buff->skb); 2012 rx_buff->skb = NULL; 2013 } 2014 } 2015 } 2016 } 2017 2018 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 2019 struct ibmvnic_tx_pool *tx_pool) 2020 { 2021 struct ibmvnic_tx_buff *tx_buff; 2022 u64 tx_entries; 2023 int i; 2024 2025 if (!tx_pool || !tx_pool->tx_buff) 2026 return; 2027 2028 tx_entries = tx_pool->num_buffers; 2029 2030 for (i = 0; i < tx_entries; i++) { 2031 tx_buff = &tx_pool->tx_buff[i]; 2032 if (tx_buff && tx_buff->skb) { 2033 dev_kfree_skb_any(tx_buff->skb); 2034 tx_buff->skb = NULL; 2035 } 2036 } 2037 } 2038 2039 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 2040 { 2041 int tx_scrqs; 2042 int i; 2043 2044 if (!adapter->tx_pool || !adapter->tso_pool) 2045 return; 2046 2047 tx_scrqs = adapter->num_active_tx_pools; 2048 2049 /* Free any remaining skbs in the tx buffer pools */ 2050 for (i = 0; i < tx_scrqs; i++) { 2051 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 2052 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 2053 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 2054 } 2055 } 2056 2057 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 2058 { 2059 struct net_device *netdev = adapter->netdev; 2060 int i; 2061 2062 if (adapter->tx_scrq) { 2063 for (i = 0; i < adapter->req_tx_queues; i++) 2064 if (adapter->tx_scrq[i]->irq) { 2065 netdev_dbg(netdev, 2066 "Disabling tx_scrq[%d] irq\n", i); 2067 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 2068 disable_irq(adapter->tx_scrq[i]->irq); 2069 } 2070 } 2071 2072 if (adapter->rx_scrq) { 2073 for (i = 0; i < adapter->req_rx_queues; i++) { 2074 if (adapter->rx_scrq[i]->irq) { 2075 netdev_dbg(netdev, 2076 "Disabling rx_scrq[%d] irq\n", i); 2077 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 2078 disable_irq(adapter->rx_scrq[i]->irq); 2079 } 2080 } 2081 } 2082 } 2083 2084 static void ibmvnic_cleanup(struct net_device *netdev) 2085 { 2086 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2087 2088 /* ensure that transmissions are stopped if called by do_reset */ 2089 2090 adapter->tx_queues_active = false; 2091 2092 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 2093 * update so they don't restart a queue after we stop it below. 2094 */ 2095 synchronize_rcu(); 2096 2097 if (test_bit(0, &adapter->resetting)) 2098 netif_tx_disable(netdev); 2099 else 2100 netif_tx_stop_all_queues(netdev); 2101 2102 ibmvnic_napi_disable(adapter); 2103 ibmvnic_disable_irqs(adapter); 2104 } 2105 2106 static int __ibmvnic_close(struct net_device *netdev) 2107 { 2108 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2109 int rc = 0; 2110 2111 adapter->state = VNIC_CLOSING; 2112 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2113 adapter->state = VNIC_CLOSED; 2114 return rc; 2115 } 2116 2117 static int ibmvnic_close(struct net_device *netdev) 2118 { 2119 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2120 int rc; 2121 2122 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 2123 adapter_state_to_string(adapter->state), 2124 adapter->failover_pending, 2125 adapter->force_reset_recovery); 2126 2127 /* If device failover is pending, just set device state and return. 2128 * Device operation will be handled by reset routine. 2129 */ 2130 if (adapter->failover_pending) { 2131 adapter->state = VNIC_CLOSED; 2132 return 0; 2133 } 2134 2135 rc = __ibmvnic_close(netdev); 2136 ibmvnic_cleanup(netdev); 2137 clean_rx_pools(adapter); 2138 clean_tx_pools(adapter); 2139 2140 return rc; 2141 } 2142 2143 /** 2144 * build_hdr_data - creates L2/L3/L4 header data buffer 2145 * @hdr_field: bitfield determining needed headers 2146 * @skb: socket buffer 2147 * @hdr_len: array of header lengths 2148 * @hdr_data: buffer to write the header to 2149 * 2150 * Reads hdr_field to determine which headers are needed by firmware. 2151 * Builds a buffer containing these headers. Saves individual header 2152 * lengths and total buffer length to be used to build descriptors. 2153 */ 2154 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 2155 int *hdr_len, u8 *hdr_data) 2156 { 2157 int len = 0; 2158 u8 *hdr; 2159 2160 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 2161 hdr_len[0] = sizeof(struct vlan_ethhdr); 2162 else 2163 hdr_len[0] = sizeof(struct ethhdr); 2164 2165 if (skb->protocol == htons(ETH_P_IP)) { 2166 hdr_len[1] = ip_hdr(skb)->ihl * 4; 2167 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2168 hdr_len[2] = tcp_hdrlen(skb); 2169 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 2170 hdr_len[2] = sizeof(struct udphdr); 2171 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2172 hdr_len[1] = sizeof(struct ipv6hdr); 2173 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2174 hdr_len[2] = tcp_hdrlen(skb); 2175 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 2176 hdr_len[2] = sizeof(struct udphdr); 2177 } else if (skb->protocol == htons(ETH_P_ARP)) { 2178 hdr_len[1] = arp_hdr_len(skb->dev); 2179 hdr_len[2] = 0; 2180 } 2181 2182 memset(hdr_data, 0, 120); 2183 if ((hdr_field >> 6) & 1) { 2184 hdr = skb_mac_header(skb); 2185 memcpy(hdr_data, hdr, hdr_len[0]); 2186 len += hdr_len[0]; 2187 } 2188 2189 if ((hdr_field >> 5) & 1) { 2190 hdr = skb_network_header(skb); 2191 memcpy(hdr_data + len, hdr, hdr_len[1]); 2192 len += hdr_len[1]; 2193 } 2194 2195 if ((hdr_field >> 4) & 1) { 2196 hdr = skb_transport_header(skb); 2197 memcpy(hdr_data + len, hdr, hdr_len[2]); 2198 len += hdr_len[2]; 2199 } 2200 return len; 2201 } 2202 2203 /** 2204 * create_hdr_descs - create header and header extension descriptors 2205 * @hdr_field: bitfield determining needed headers 2206 * @hdr_data: buffer containing header data 2207 * @len: length of data buffer 2208 * @hdr_len: array of individual header lengths 2209 * @scrq_arr: descriptor array 2210 * 2211 * Creates header and, if needed, header extension descriptors and 2212 * places them in a descriptor array, scrq_arr 2213 */ 2214 2215 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 2216 union sub_crq *scrq_arr) 2217 { 2218 union sub_crq hdr_desc; 2219 int tmp_len = len; 2220 int num_descs = 0; 2221 u8 *data, *cur; 2222 int tmp; 2223 2224 while (tmp_len > 0) { 2225 cur = hdr_data + len - tmp_len; 2226 2227 memset(&hdr_desc, 0, sizeof(hdr_desc)); 2228 if (cur != hdr_data) { 2229 data = hdr_desc.hdr_ext.data; 2230 tmp = tmp_len > 29 ? 29 : tmp_len; 2231 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 2232 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 2233 hdr_desc.hdr_ext.len = tmp; 2234 } else { 2235 data = hdr_desc.hdr.data; 2236 tmp = tmp_len > 24 ? 24 : tmp_len; 2237 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 2238 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 2239 hdr_desc.hdr.len = tmp; 2240 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 2241 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 2242 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 2243 hdr_desc.hdr.flag = hdr_field << 1; 2244 } 2245 memcpy(data, cur, tmp); 2246 tmp_len -= tmp; 2247 *scrq_arr = hdr_desc; 2248 scrq_arr++; 2249 num_descs++; 2250 } 2251 2252 return num_descs; 2253 } 2254 2255 /** 2256 * build_hdr_descs_arr - build a header descriptor array 2257 * @skb: tx socket buffer 2258 * @indir_arr: indirect array 2259 * @num_entries: number of descriptors to be sent 2260 * @hdr_field: bit field determining which headers will be sent 2261 * 2262 * This function will build a TX descriptor array with applicable 2263 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 2264 */ 2265 2266 static void build_hdr_descs_arr(struct sk_buff *skb, 2267 union sub_crq *indir_arr, 2268 int *num_entries, u8 hdr_field) 2269 { 2270 int hdr_len[3] = {0, 0, 0}; 2271 u8 hdr_data[140] = {0}; 2272 int tot_len; 2273 2274 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 2275 hdr_data); 2276 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 2277 indir_arr + 1); 2278 } 2279 2280 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 2281 struct net_device *netdev) 2282 { 2283 /* For some backing devices, mishandling of small packets 2284 * can result in a loss of connection or TX stall. Device 2285 * architects recommend that no packet should be smaller 2286 * than the minimum MTU value provided to the driver, so 2287 * pad any packets to that length 2288 */ 2289 if (skb->len < netdev->min_mtu) 2290 return skb_put_padto(skb, netdev->min_mtu); 2291 2292 return 0; 2293 } 2294 2295 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 2296 struct ibmvnic_sub_crq_queue *tx_scrq) 2297 { 2298 struct ibmvnic_ind_xmit_queue *ind_bufp; 2299 struct ibmvnic_tx_buff *tx_buff; 2300 struct ibmvnic_tx_pool *tx_pool; 2301 union sub_crq tx_scrq_entry; 2302 int queue_num; 2303 int entries; 2304 int index; 2305 int i; 2306 2307 ind_bufp = &tx_scrq->ind_buf; 2308 entries = (u64)ind_bufp->index; 2309 queue_num = tx_scrq->pool_index; 2310 2311 for (i = entries - 1; i >= 0; --i) { 2312 tx_scrq_entry = ind_bufp->indir_arr[i]; 2313 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 2314 continue; 2315 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 2316 if (index & IBMVNIC_TSO_POOL_MASK) { 2317 tx_pool = &adapter->tso_pool[queue_num]; 2318 index &= ~IBMVNIC_TSO_POOL_MASK; 2319 } else { 2320 tx_pool = &adapter->tx_pool[queue_num]; 2321 } 2322 tx_pool->free_map[tx_pool->consumer_index] = index; 2323 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2324 tx_pool->num_buffers - 1 : 2325 tx_pool->consumer_index - 1; 2326 tx_buff = &tx_pool->tx_buff[index]; 2327 adapter->netdev->stats.tx_packets--; 2328 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 2329 adapter->tx_stats_buffers[queue_num].batched_packets--; 2330 adapter->tx_stats_buffers[queue_num].bytes -= 2331 tx_buff->skb->len; 2332 dev_kfree_skb_any(tx_buff->skb); 2333 tx_buff->skb = NULL; 2334 adapter->netdev->stats.tx_dropped++; 2335 } 2336 2337 ind_bufp->index = 0; 2338 2339 if (atomic_sub_return(entries, &tx_scrq->used) <= 2340 (adapter->req_tx_entries_per_subcrq / 2) && 2341 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 2342 rcu_read_lock(); 2343 2344 if (adapter->tx_queues_active) { 2345 netif_wake_subqueue(adapter->netdev, queue_num); 2346 netdev_dbg(adapter->netdev, "Started queue %d\n", 2347 queue_num); 2348 } 2349 2350 rcu_read_unlock(); 2351 } 2352 } 2353 2354 static int send_subcrq_direct(struct ibmvnic_adapter *adapter, 2355 u64 remote_handle, u64 *entry) 2356 { 2357 unsigned int ua = adapter->vdev->unit_address; 2358 struct device *dev = &adapter->vdev->dev; 2359 int rc; 2360 2361 /* Make sure the hypervisor sees the complete request */ 2362 dma_wmb(); 2363 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2364 cpu_to_be64(remote_handle), 2365 cpu_to_be64(entry[0]), cpu_to_be64(entry[1]), 2366 cpu_to_be64(entry[2]), cpu_to_be64(entry[3])); 2367 2368 if (rc) 2369 print_subcrq_error(dev, rc, __func__); 2370 2371 return rc; 2372 } 2373 2374 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 2375 struct ibmvnic_sub_crq_queue *tx_scrq, 2376 bool indirect) 2377 { 2378 struct ibmvnic_ind_xmit_queue *ind_bufp; 2379 u64 dma_addr; 2380 u64 entries; 2381 u64 handle; 2382 int rc; 2383 2384 ind_bufp = &tx_scrq->ind_buf; 2385 dma_addr = (u64)ind_bufp->indir_dma; 2386 entries = (u64)ind_bufp->index; 2387 handle = tx_scrq->handle; 2388 2389 if (!entries) 2390 return 0; 2391 2392 if (indirect) 2393 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 2394 else 2395 rc = send_subcrq_direct(adapter, handle, 2396 (u64 *)ind_bufp->indir_arr); 2397 2398 if (rc) 2399 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 2400 else 2401 ind_bufp->index = 0; 2402 return rc; 2403 } 2404 2405 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 2406 { 2407 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2408 int queue_num = skb_get_queue_mapping(skb); 2409 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 2410 struct device *dev = &adapter->vdev->dev; 2411 struct ibmvnic_ind_xmit_queue *ind_bufp; 2412 struct ibmvnic_tx_buff *tx_buff = NULL; 2413 struct ibmvnic_sub_crq_queue *tx_scrq; 2414 struct ibmvnic_long_term_buff *ltb; 2415 struct ibmvnic_tx_pool *tx_pool; 2416 unsigned int tx_send_failed = 0; 2417 netdev_tx_t ret = NETDEV_TX_OK; 2418 unsigned int tx_map_failed = 0; 2419 union sub_crq indir_arr[16]; 2420 unsigned int tx_dropped = 0; 2421 unsigned int tx_dpackets = 0; 2422 unsigned int tx_bpackets = 0; 2423 unsigned int tx_bytes = 0; 2424 dma_addr_t data_dma_addr; 2425 struct netdev_queue *txq; 2426 unsigned long lpar_rc; 2427 unsigned int skblen; 2428 union sub_crq tx_crq; 2429 unsigned int offset; 2430 bool use_scrq_send_direct = false; 2431 int num_entries = 1; 2432 unsigned char *dst; 2433 int bufidx = 0; 2434 u8 proto = 0; 2435 2436 /* If a reset is in progress, drop the packet since 2437 * the scrqs may get torn down. Otherwise use the 2438 * rcu to ensure reset waits for us to complete. 2439 */ 2440 rcu_read_lock(); 2441 if (!adapter->tx_queues_active) { 2442 dev_kfree_skb_any(skb); 2443 2444 tx_send_failed++; 2445 tx_dropped++; 2446 ret = NETDEV_TX_OK; 2447 goto out; 2448 } 2449 2450 tx_scrq = adapter->tx_scrq[queue_num]; 2451 txq = netdev_get_tx_queue(netdev, queue_num); 2452 ind_bufp = &tx_scrq->ind_buf; 2453 2454 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2455 tx_dropped++; 2456 tx_send_failed++; 2457 ret = NETDEV_TX_OK; 2458 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2459 if (lpar_rc != H_SUCCESS) 2460 goto tx_err; 2461 goto out; 2462 } 2463 2464 if (skb_is_gso(skb)) 2465 tx_pool = &adapter->tso_pool[queue_num]; 2466 else 2467 tx_pool = &adapter->tx_pool[queue_num]; 2468 2469 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2470 2471 if (bufidx == IBMVNIC_INVALID_MAP) { 2472 dev_kfree_skb_any(skb); 2473 tx_send_failed++; 2474 tx_dropped++; 2475 ret = NETDEV_TX_OK; 2476 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2477 if (lpar_rc != H_SUCCESS) 2478 goto tx_err; 2479 goto out; 2480 } 2481 2482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2483 2484 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2485 2486 dst = ltb->buff + offset; 2487 memset(dst, 0, tx_pool->buf_size); 2488 data_dma_addr = ltb->addr + offset; 2489 2490 /* if we are going to send_subcrq_direct this then we need to 2491 * update the checksum before copying the data into ltb. Essentially 2492 * these packets force disable CSO so that we can guarantee that 2493 * FW does not need header info and we can send direct. Also, vnic 2494 * server must be able to xmit standard packets without header data 2495 */ 2496 if (*hdrs == 0 && !skb_is_gso(skb) && 2497 !ind_bufp->index && !netdev_xmit_more()) { 2498 use_scrq_send_direct = true; 2499 if (skb->ip_summed == CHECKSUM_PARTIAL && 2500 skb_checksum_help(skb)) 2501 use_scrq_send_direct = false; 2502 } 2503 2504 if (skb_shinfo(skb)->nr_frags) { 2505 int cur, i; 2506 2507 /* Copy the head */ 2508 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2509 cur = skb_headlen(skb); 2510 2511 /* Copy the frags */ 2512 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2513 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2514 2515 memcpy(dst + cur, skb_frag_address(frag), 2516 skb_frag_size(frag)); 2517 cur += skb_frag_size(frag); 2518 } 2519 } else { 2520 skb_copy_from_linear_data(skb, dst, skb->len); 2521 } 2522 2523 /* post changes to long_term_buff *dst before VIOS accessing it */ 2524 dma_wmb(); 2525 2526 tx_pool->consumer_index = 2527 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2528 2529 tx_buff = &tx_pool->tx_buff[bufidx]; 2530 2531 /* Sanity checks on our free map to make sure it points to an index 2532 * that is not being occupied by another skb. If skb memory is 2533 * not freed then we see congestion control kick in and halt tx. 2534 */ 2535 if (unlikely(tx_buff->skb)) { 2536 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n", 2537 skb_is_gso(skb) ? "tso_pool" : "tx_pool", 2538 queue_num, bufidx); 2539 dev_kfree_skb_any(tx_buff->skb); 2540 } 2541 2542 tx_buff->skb = skb; 2543 tx_buff->index = bufidx; 2544 tx_buff->pool_index = queue_num; 2545 skblen = skb->len; 2546 2547 memset(&tx_crq, 0, sizeof(tx_crq)); 2548 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2549 tx_crq.v1.type = IBMVNIC_TX_DESC; 2550 tx_crq.v1.n_crq_elem = 1; 2551 tx_crq.v1.n_sge = 1; 2552 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2553 2554 if (skb_is_gso(skb)) 2555 tx_crq.v1.correlator = 2556 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2557 else 2558 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2559 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2560 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2561 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2562 2563 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2564 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2565 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2566 } 2567 2568 if (skb->protocol == htons(ETH_P_IP)) { 2569 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2570 proto = ip_hdr(skb)->protocol; 2571 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2572 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2573 proto = ipv6_hdr(skb)->nexthdr; 2574 } 2575 2576 if (proto == IPPROTO_TCP) 2577 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2578 else if (proto == IPPROTO_UDP) 2579 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2580 2581 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2582 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2583 hdrs += 2; 2584 } 2585 if (skb_is_gso(skb)) { 2586 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2587 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2588 hdrs += 2; 2589 } else if (use_scrq_send_direct) { 2590 /* See above comment, CSO disabled with direct xmit */ 2591 tx_crq.v1.flags1 &= ~(IBMVNIC_TX_CHKSUM_OFFLOAD); 2592 ind_bufp->index = 1; 2593 tx_buff->num_entries = 1; 2594 netdev_tx_sent_queue(txq, skb->len); 2595 ind_bufp->indir_arr[0] = tx_crq; 2596 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, false); 2597 if (lpar_rc != H_SUCCESS) 2598 goto tx_err; 2599 2600 tx_dpackets++; 2601 goto early_exit; 2602 } 2603 2604 if ((*hdrs >> 7) & 1) 2605 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2606 2607 tx_crq.v1.n_crq_elem = num_entries; 2608 tx_buff->num_entries = num_entries; 2609 /* flush buffer if current entry can not fit */ 2610 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2611 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2612 if (lpar_rc != H_SUCCESS) 2613 goto tx_flush_err; 2614 } 2615 2616 indir_arr[0] = tx_crq; 2617 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2618 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2619 2620 ind_bufp->index += num_entries; 2621 if (__netdev_tx_sent_queue(txq, skb->len, 2622 netdev_xmit_more() && 2623 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2624 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2625 if (lpar_rc != H_SUCCESS) 2626 goto tx_err; 2627 } 2628 2629 tx_bpackets++; 2630 2631 early_exit: 2632 if (atomic_add_return(num_entries, &tx_scrq->used) 2633 >= adapter->req_tx_entries_per_subcrq) { 2634 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2635 netif_stop_subqueue(netdev, queue_num); 2636 } 2637 2638 tx_bytes += skblen; 2639 txq_trans_cond_update(txq); 2640 ret = NETDEV_TX_OK; 2641 goto out; 2642 2643 tx_flush_err: 2644 dev_kfree_skb_any(skb); 2645 tx_buff->skb = NULL; 2646 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2647 tx_pool->num_buffers - 1 : 2648 tx_pool->consumer_index - 1; 2649 tx_dropped++; 2650 tx_err: 2651 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2652 dev_err_ratelimited(dev, "tx: send failed\n"); 2653 2654 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2655 /* Disable TX and report carrier off if queue is closed 2656 * or pending failover. 2657 * Firmware guarantees that a signal will be sent to the 2658 * driver, triggering a reset or some other action. 2659 */ 2660 netif_tx_stop_all_queues(netdev); 2661 netif_carrier_off(netdev); 2662 } 2663 out: 2664 rcu_read_unlock(); 2665 netdev->stats.tx_dropped += tx_dropped; 2666 netdev->stats.tx_bytes += tx_bytes; 2667 netdev->stats.tx_packets += tx_bpackets + tx_dpackets; 2668 adapter->tx_send_failed += tx_send_failed; 2669 adapter->tx_map_failed += tx_map_failed; 2670 adapter->tx_stats_buffers[queue_num].batched_packets += tx_bpackets; 2671 adapter->tx_stats_buffers[queue_num].direct_packets += tx_dpackets; 2672 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2673 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2674 2675 return ret; 2676 } 2677 2678 static void ibmvnic_set_multi(struct net_device *netdev) 2679 { 2680 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2681 struct netdev_hw_addr *ha; 2682 union ibmvnic_crq crq; 2683 2684 memset(&crq, 0, sizeof(crq)); 2685 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2686 crq.request_capability.cmd = REQUEST_CAPABILITY; 2687 2688 if (netdev->flags & IFF_PROMISC) { 2689 if (!adapter->promisc_supported) 2690 return; 2691 } else { 2692 if (netdev->flags & IFF_ALLMULTI) { 2693 /* Accept all multicast */ 2694 memset(&crq, 0, sizeof(crq)); 2695 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2696 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2697 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2698 ibmvnic_send_crq(adapter, &crq); 2699 } else if (netdev_mc_empty(netdev)) { 2700 /* Reject all multicast */ 2701 memset(&crq, 0, sizeof(crq)); 2702 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2703 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2704 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2705 ibmvnic_send_crq(adapter, &crq); 2706 } else { 2707 /* Accept one or more multicast(s) */ 2708 netdev_for_each_mc_addr(ha, netdev) { 2709 memset(&crq, 0, sizeof(crq)); 2710 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2711 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2712 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2713 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2714 ha->addr); 2715 ibmvnic_send_crq(adapter, &crq); 2716 } 2717 } 2718 } 2719 } 2720 2721 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2722 { 2723 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2724 union ibmvnic_crq crq; 2725 int rc; 2726 2727 if (!is_valid_ether_addr(dev_addr)) { 2728 rc = -EADDRNOTAVAIL; 2729 goto err; 2730 } 2731 2732 memset(&crq, 0, sizeof(crq)); 2733 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2734 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2735 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2736 2737 mutex_lock(&adapter->fw_lock); 2738 adapter->fw_done_rc = 0; 2739 reinit_completion(&adapter->fw_done); 2740 2741 rc = ibmvnic_send_crq(adapter, &crq); 2742 if (rc) { 2743 rc = -EIO; 2744 mutex_unlock(&adapter->fw_lock); 2745 goto err; 2746 } 2747 2748 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2749 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2750 if (rc || adapter->fw_done_rc) { 2751 rc = -EIO; 2752 mutex_unlock(&adapter->fw_lock); 2753 goto err; 2754 } 2755 mutex_unlock(&adapter->fw_lock); 2756 return 0; 2757 err: 2758 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2759 return rc; 2760 } 2761 2762 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2763 { 2764 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2765 struct sockaddr *addr = p; 2766 int rc; 2767 2768 rc = 0; 2769 if (!is_valid_ether_addr(addr->sa_data)) 2770 return -EADDRNOTAVAIL; 2771 2772 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2773 if (adapter->state != VNIC_PROBED) 2774 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2775 2776 return rc; 2777 } 2778 2779 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2780 { 2781 switch (reason) { 2782 case VNIC_RESET_FAILOVER: 2783 return "FAILOVER"; 2784 case VNIC_RESET_MOBILITY: 2785 return "MOBILITY"; 2786 case VNIC_RESET_FATAL: 2787 return "FATAL"; 2788 case VNIC_RESET_NON_FATAL: 2789 return "NON_FATAL"; 2790 case VNIC_RESET_TIMEOUT: 2791 return "TIMEOUT"; 2792 case VNIC_RESET_CHANGE_PARAM: 2793 return "CHANGE_PARAM"; 2794 case VNIC_RESET_PASSIVE_INIT: 2795 return "PASSIVE_INIT"; 2796 } 2797 return "UNKNOWN"; 2798 } 2799 2800 /* 2801 * Initialize the init_done completion and return code values. We 2802 * can get a transport event just after registering the CRQ and the 2803 * tasklet will use this to communicate the transport event. To ensure 2804 * we don't miss the notification/error, initialize these _before_ 2805 * regisering the CRQ. 2806 */ 2807 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2808 { 2809 reinit_completion(&adapter->init_done); 2810 adapter->init_done_rc = 0; 2811 } 2812 2813 /* 2814 * do_reset returns zero if we are able to keep processing reset events, or 2815 * non-zero if we hit a fatal error and must halt. 2816 */ 2817 static int do_reset(struct ibmvnic_adapter *adapter, 2818 struct ibmvnic_rwi *rwi, u32 reset_state) 2819 { 2820 struct net_device *netdev = adapter->netdev; 2821 u64 old_num_rx_queues, old_num_tx_queues; 2822 u64 old_num_rx_slots, old_num_tx_slots; 2823 int rc; 2824 2825 netdev_dbg(adapter->netdev, 2826 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2827 adapter_state_to_string(adapter->state), 2828 adapter->failover_pending, 2829 reset_reason_to_string(rwi->reset_reason), 2830 adapter_state_to_string(reset_state)); 2831 2832 adapter->reset_reason = rwi->reset_reason; 2833 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2834 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2835 rtnl_lock(); 2836 2837 /* Now that we have the rtnl lock, clear any pending failover. 2838 * This will ensure ibmvnic_open() has either completed or will 2839 * block until failover is complete. 2840 */ 2841 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2842 adapter->failover_pending = false; 2843 2844 /* read the state and check (again) after getting rtnl */ 2845 reset_state = adapter->state; 2846 2847 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2848 rc = -EBUSY; 2849 goto out; 2850 } 2851 2852 netif_carrier_off(netdev); 2853 2854 old_num_rx_queues = adapter->req_rx_queues; 2855 old_num_tx_queues = adapter->req_tx_queues; 2856 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2857 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2858 2859 ibmvnic_cleanup(netdev); 2860 2861 if (reset_state == VNIC_OPEN && 2862 adapter->reset_reason != VNIC_RESET_MOBILITY && 2863 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2864 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2865 rc = __ibmvnic_close(netdev); 2866 if (rc) 2867 goto out; 2868 } else { 2869 adapter->state = VNIC_CLOSING; 2870 2871 /* Release the RTNL lock before link state change and 2872 * re-acquire after the link state change to allow 2873 * linkwatch_event to grab the RTNL lock and run during 2874 * a reset. 2875 */ 2876 rtnl_unlock(); 2877 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2878 rtnl_lock(); 2879 if (rc) 2880 goto out; 2881 2882 if (adapter->state == VNIC_OPEN) { 2883 /* When we dropped rtnl, ibmvnic_open() got 2884 * it and noticed that we are resetting and 2885 * set the adapter state to OPEN. Update our 2886 * new "target" state, and resume the reset 2887 * from VNIC_CLOSING state. 2888 */ 2889 netdev_dbg(netdev, 2890 "Open changed state from %s, updating.\n", 2891 adapter_state_to_string(reset_state)); 2892 reset_state = VNIC_OPEN; 2893 adapter->state = VNIC_CLOSING; 2894 } 2895 2896 if (adapter->state != VNIC_CLOSING) { 2897 /* If someone else changed the adapter state 2898 * when we dropped the rtnl, fail the reset 2899 */ 2900 rc = -EAGAIN; 2901 goto out; 2902 } 2903 adapter->state = VNIC_CLOSED; 2904 } 2905 } 2906 2907 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2908 release_resources(adapter); 2909 release_sub_crqs(adapter, 1); 2910 release_crq_queue(adapter); 2911 } 2912 2913 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2914 /* remove the closed state so when we call open it appears 2915 * we are coming from the probed state. 2916 */ 2917 adapter->state = VNIC_PROBED; 2918 2919 reinit_init_done(adapter); 2920 2921 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2922 rc = init_crq_queue(adapter); 2923 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2924 rc = ibmvnic_reenable_crq_queue(adapter); 2925 release_sub_crqs(adapter, 1); 2926 } else { 2927 rc = ibmvnic_reset_crq(adapter); 2928 if (rc == H_CLOSED || rc == H_SUCCESS) { 2929 rc = vio_enable_interrupts(adapter->vdev); 2930 if (rc) 2931 netdev_err(adapter->netdev, 2932 "Reset failed to enable interrupts. rc=%d\n", 2933 rc); 2934 } 2935 } 2936 2937 if (rc) { 2938 netdev_err(adapter->netdev, 2939 "Reset couldn't initialize crq. rc=%d\n", rc); 2940 goto out; 2941 } 2942 2943 rc = ibmvnic_reset_init(adapter, true); 2944 if (rc) 2945 goto out; 2946 2947 /* If the adapter was in PROBE or DOWN state prior to the reset, 2948 * exit here. 2949 */ 2950 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2951 rc = 0; 2952 goto out; 2953 } 2954 2955 rc = ibmvnic_login(netdev); 2956 if (rc) 2957 goto out; 2958 2959 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2960 rc = init_resources(adapter); 2961 if (rc) 2962 goto out; 2963 } else if (adapter->req_rx_queues != old_num_rx_queues || 2964 adapter->req_tx_queues != old_num_tx_queues || 2965 adapter->req_rx_add_entries_per_subcrq != 2966 old_num_rx_slots || 2967 adapter->req_tx_entries_per_subcrq != 2968 old_num_tx_slots || 2969 !adapter->rx_pool || 2970 !adapter->tso_pool || 2971 !adapter->tx_pool) { 2972 release_napi(adapter); 2973 release_vpd_data(adapter); 2974 2975 rc = init_resources(adapter); 2976 if (rc) 2977 goto out; 2978 2979 } else { 2980 rc = init_tx_pools(netdev); 2981 if (rc) { 2982 netdev_dbg(netdev, 2983 "init tx pools failed (%d)\n", 2984 rc); 2985 goto out; 2986 } 2987 2988 rc = init_rx_pools(netdev); 2989 if (rc) { 2990 netdev_dbg(netdev, 2991 "init rx pools failed (%d)\n", 2992 rc); 2993 goto out; 2994 } 2995 } 2996 ibmvnic_disable_irqs(adapter); 2997 } 2998 adapter->state = VNIC_CLOSED; 2999 3000 if (reset_state == VNIC_CLOSED) { 3001 rc = 0; 3002 goto out; 3003 } 3004 3005 rc = __ibmvnic_open(netdev); 3006 if (rc) { 3007 rc = IBMVNIC_OPEN_FAILED; 3008 goto out; 3009 } 3010 3011 /* refresh device's multicast list */ 3012 ibmvnic_set_multi(netdev); 3013 3014 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 3015 adapter->reset_reason == VNIC_RESET_MOBILITY) 3016 __netdev_notify_peers(netdev); 3017 3018 rc = 0; 3019 3020 out: 3021 /* restore the adapter state if reset failed */ 3022 if (rc) 3023 adapter->state = reset_state; 3024 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 3025 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 3026 rtnl_unlock(); 3027 3028 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 3029 adapter_state_to_string(adapter->state), 3030 adapter->failover_pending, rc); 3031 return rc; 3032 } 3033 3034 static int do_hard_reset(struct ibmvnic_adapter *adapter, 3035 struct ibmvnic_rwi *rwi, u32 reset_state) 3036 { 3037 struct net_device *netdev = adapter->netdev; 3038 int rc; 3039 3040 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 3041 reset_reason_to_string(rwi->reset_reason)); 3042 3043 /* read the state and check (again) after getting rtnl */ 3044 reset_state = adapter->state; 3045 3046 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 3047 rc = -EBUSY; 3048 goto out; 3049 } 3050 3051 netif_carrier_off(netdev); 3052 adapter->reset_reason = rwi->reset_reason; 3053 3054 ibmvnic_cleanup(netdev); 3055 release_resources(adapter); 3056 release_sub_crqs(adapter, 0); 3057 release_crq_queue(adapter); 3058 3059 /* remove the closed state so when we call open it appears 3060 * we are coming from the probed state. 3061 */ 3062 adapter->state = VNIC_PROBED; 3063 3064 reinit_init_done(adapter); 3065 3066 rc = init_crq_queue(adapter); 3067 if (rc) { 3068 netdev_err(adapter->netdev, 3069 "Couldn't initialize crq. rc=%d\n", rc); 3070 goto out; 3071 } 3072 3073 rc = ibmvnic_reset_init(adapter, false); 3074 if (rc) 3075 goto out; 3076 3077 /* If the adapter was in PROBE or DOWN state prior to the reset, 3078 * exit here. 3079 */ 3080 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3081 goto out; 3082 3083 rc = ibmvnic_login(netdev); 3084 if (rc) 3085 goto out; 3086 3087 rc = init_resources(adapter); 3088 if (rc) 3089 goto out; 3090 3091 ibmvnic_disable_irqs(adapter); 3092 adapter->state = VNIC_CLOSED; 3093 3094 if (reset_state == VNIC_CLOSED) 3095 goto out; 3096 3097 rc = __ibmvnic_open(netdev); 3098 if (rc) { 3099 rc = IBMVNIC_OPEN_FAILED; 3100 goto out; 3101 } 3102 3103 __netdev_notify_peers(netdev); 3104 out: 3105 /* restore adapter state if reset failed */ 3106 if (rc) 3107 adapter->state = reset_state; 3108 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3109 adapter_state_to_string(adapter->state), 3110 adapter->failover_pending, rc); 3111 return rc; 3112 } 3113 3114 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3115 { 3116 struct ibmvnic_rwi *rwi; 3117 unsigned long flags; 3118 3119 spin_lock_irqsave(&adapter->rwi_lock, flags); 3120 3121 if (!list_empty(&adapter->rwi_list)) { 3122 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3123 list); 3124 list_del(&rwi->list); 3125 } else { 3126 rwi = NULL; 3127 } 3128 3129 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3130 return rwi; 3131 } 3132 3133 /** 3134 * do_passive_init - complete probing when partner device is detected. 3135 * @adapter: ibmvnic_adapter struct 3136 * 3137 * If the ibmvnic device does not have a partner device to communicate with at boot 3138 * and that partner device comes online at a later time, this function is called 3139 * to complete the initialization process of ibmvnic device. 3140 * Caller is expected to hold rtnl_lock(). 3141 * 3142 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3143 * in the down state. 3144 * Returns 0 upon success and the device is in PROBED state. 3145 */ 3146 3147 static int do_passive_init(struct ibmvnic_adapter *adapter) 3148 { 3149 unsigned long timeout = msecs_to_jiffies(30000); 3150 struct net_device *netdev = adapter->netdev; 3151 struct device *dev = &adapter->vdev->dev; 3152 int rc; 3153 3154 netdev_dbg(netdev, "Partner device found, probing.\n"); 3155 3156 adapter->state = VNIC_PROBING; 3157 reinit_completion(&adapter->init_done); 3158 adapter->init_done_rc = 0; 3159 adapter->crq.active = true; 3160 3161 rc = send_crq_init_complete(adapter); 3162 if (rc) 3163 goto out; 3164 3165 rc = send_version_xchg(adapter); 3166 if (rc) 3167 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3168 3169 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3170 dev_err(dev, "Initialization sequence timed out\n"); 3171 rc = -ETIMEDOUT; 3172 goto out; 3173 } 3174 3175 rc = init_sub_crqs(adapter); 3176 if (rc) { 3177 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3178 goto out; 3179 } 3180 3181 rc = init_sub_crq_irqs(adapter); 3182 if (rc) { 3183 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3184 goto init_failed; 3185 } 3186 3187 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3188 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3189 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3190 3191 adapter->state = VNIC_PROBED; 3192 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3193 3194 return 0; 3195 3196 init_failed: 3197 release_sub_crqs(adapter, 1); 3198 out: 3199 adapter->state = VNIC_DOWN; 3200 return rc; 3201 } 3202 3203 static void __ibmvnic_reset(struct work_struct *work) 3204 { 3205 struct ibmvnic_adapter *adapter; 3206 unsigned int timeout = 5000; 3207 struct ibmvnic_rwi *tmprwi; 3208 bool saved_state = false; 3209 struct ibmvnic_rwi *rwi; 3210 unsigned long flags; 3211 struct device *dev; 3212 bool need_reset; 3213 int num_fails = 0; 3214 u32 reset_state; 3215 int rc = 0; 3216 3217 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3218 dev = &adapter->vdev->dev; 3219 3220 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3221 * or if another reset is in progress, defer work for now. If probe 3222 * eventually fails it will flush and terminate our work. 3223 * 3224 * Three possibilities here: 3225 * 1. Adpater being removed - just return 3226 * 2. Timed out on probe or another reset in progress - delay the work 3227 * 3. Completed probe - perform any resets in queue 3228 */ 3229 if (adapter->state == VNIC_PROBING && 3230 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3231 dev_err(dev, "Reset thread timed out on probe"); 3232 queue_delayed_work(system_long_wq, 3233 &adapter->ibmvnic_delayed_reset, 3234 IBMVNIC_RESET_DELAY); 3235 return; 3236 } 3237 3238 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3239 if (adapter->state == VNIC_REMOVING) 3240 return; 3241 3242 /* ->rwi_list is stable now (no one else is removing entries) */ 3243 3244 /* ibmvnic_probe() may have purged the reset queue after we were 3245 * scheduled to process a reset so there maybe no resets to process. 3246 * Before setting the ->resetting bit though, we have to make sure 3247 * that there is infact a reset to process. Otherwise we may race 3248 * with ibmvnic_open() and end up leaving the vnic down: 3249 * 3250 * __ibmvnic_reset() ibmvnic_open() 3251 * ----------------- -------------- 3252 * 3253 * set ->resetting bit 3254 * find ->resetting bit is set 3255 * set ->state to IBMVNIC_OPEN (i.e 3256 * assume reset will open device) 3257 * return 3258 * find reset queue empty 3259 * return 3260 * 3261 * Neither performed vnic login/open and vnic stays down 3262 * 3263 * If we hold the lock and conditionally set the bit, either we 3264 * or ibmvnic_open() will complete the open. 3265 */ 3266 need_reset = false; 3267 spin_lock(&adapter->rwi_lock); 3268 if (!list_empty(&adapter->rwi_list)) { 3269 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3270 queue_delayed_work(system_long_wq, 3271 &adapter->ibmvnic_delayed_reset, 3272 IBMVNIC_RESET_DELAY); 3273 } else { 3274 need_reset = true; 3275 } 3276 } 3277 spin_unlock(&adapter->rwi_lock); 3278 3279 if (!need_reset) 3280 return; 3281 3282 rwi = get_next_rwi(adapter); 3283 while (rwi) { 3284 spin_lock_irqsave(&adapter->state_lock, flags); 3285 3286 if (adapter->state == VNIC_REMOVING || 3287 adapter->state == VNIC_REMOVED) { 3288 spin_unlock_irqrestore(&adapter->state_lock, flags); 3289 kfree(rwi); 3290 rc = EBUSY; 3291 break; 3292 } 3293 3294 if (!saved_state) { 3295 reset_state = adapter->state; 3296 saved_state = true; 3297 } 3298 spin_unlock_irqrestore(&adapter->state_lock, flags); 3299 3300 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3301 rtnl_lock(); 3302 rc = do_passive_init(adapter); 3303 rtnl_unlock(); 3304 if (!rc) 3305 netif_carrier_on(adapter->netdev); 3306 } else if (adapter->force_reset_recovery) { 3307 /* Since we are doing a hard reset now, clear the 3308 * failover_pending flag so we don't ignore any 3309 * future MOBILITY or other resets. 3310 */ 3311 adapter->failover_pending = false; 3312 3313 /* Transport event occurred during previous reset */ 3314 if (adapter->wait_for_reset) { 3315 /* Previous was CHANGE_PARAM; caller locked */ 3316 adapter->force_reset_recovery = false; 3317 rc = do_hard_reset(adapter, rwi, reset_state); 3318 } else { 3319 rtnl_lock(); 3320 adapter->force_reset_recovery = false; 3321 rc = do_hard_reset(adapter, rwi, reset_state); 3322 rtnl_unlock(); 3323 } 3324 if (rc) 3325 num_fails++; 3326 else 3327 num_fails = 0; 3328 3329 /* If auto-priority-failover is enabled we can get 3330 * back to back failovers during resets, resulting 3331 * in at least two failed resets (from high-priority 3332 * backing device to low-priority one and then back) 3333 * If resets continue to fail beyond that, give the 3334 * adapter some time to settle down before retrying. 3335 */ 3336 if (num_fails >= 3) { 3337 netdev_dbg(adapter->netdev, 3338 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3339 adapter_state_to_string(adapter->state), 3340 num_fails); 3341 set_current_state(TASK_UNINTERRUPTIBLE); 3342 schedule_timeout(60 * HZ); 3343 } 3344 } else { 3345 rc = do_reset(adapter, rwi, reset_state); 3346 } 3347 tmprwi = rwi; 3348 adapter->last_reset_time = jiffies; 3349 3350 if (rc) 3351 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3352 3353 rwi = get_next_rwi(adapter); 3354 3355 /* 3356 * If there are no resets queued and the previous reset failed, 3357 * the adapter would be in an undefined state. So retry the 3358 * previous reset as a hard reset. 3359 * 3360 * Else, free the previous rwi and, if there is another reset 3361 * queued, process the new reset even if previous reset failed 3362 * (the previous reset could have failed because of a fail 3363 * over for instance, so process the fail over). 3364 */ 3365 if (!rwi && rc) 3366 rwi = tmprwi; 3367 else 3368 kfree(tmprwi); 3369 3370 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3371 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3372 adapter->force_reset_recovery = true; 3373 } 3374 3375 if (adapter->wait_for_reset) { 3376 adapter->reset_done_rc = rc; 3377 complete(&adapter->reset_done); 3378 } 3379 3380 clear_bit_unlock(0, &adapter->resetting); 3381 3382 netdev_dbg(adapter->netdev, 3383 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3384 adapter_state_to_string(adapter->state), 3385 adapter->force_reset_recovery, 3386 adapter->wait_for_reset); 3387 } 3388 3389 static void __ibmvnic_delayed_reset(struct work_struct *work) 3390 { 3391 struct ibmvnic_adapter *adapter; 3392 3393 adapter = container_of(work, struct ibmvnic_adapter, 3394 ibmvnic_delayed_reset.work); 3395 __ibmvnic_reset(&adapter->ibmvnic_reset); 3396 } 3397 3398 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3399 { 3400 struct list_head *entry, *tmp_entry; 3401 3402 if (!list_empty(&adapter->rwi_list)) { 3403 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3404 list_del(entry); 3405 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3406 } 3407 } 3408 } 3409 3410 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3411 enum ibmvnic_reset_reason reason) 3412 { 3413 struct net_device *netdev = adapter->netdev; 3414 struct ibmvnic_rwi *rwi, *tmp; 3415 unsigned long flags; 3416 int ret; 3417 3418 spin_lock_irqsave(&adapter->rwi_lock, flags); 3419 3420 /* If failover is pending don't schedule any other reset. 3421 * Instead let the failover complete. If there is already a 3422 * a failover reset scheduled, we will detect and drop the 3423 * duplicate reset when walking the ->rwi_list below. 3424 */ 3425 if (adapter->state == VNIC_REMOVING || 3426 adapter->state == VNIC_REMOVED || 3427 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3428 ret = EBUSY; 3429 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3430 goto err; 3431 } 3432 3433 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3434 if (tmp->reset_reason == reason) { 3435 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3436 reset_reason_to_string(reason)); 3437 ret = EBUSY; 3438 goto err; 3439 } 3440 } 3441 3442 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3443 if (!rwi) { 3444 ret = ENOMEM; 3445 goto err; 3446 } 3447 /* if we just received a transport event, 3448 * flush reset queue and process this reset 3449 */ 3450 if (adapter->force_reset_recovery) 3451 flush_reset_queue(adapter); 3452 3453 rwi->reset_reason = reason; 3454 list_add_tail(&rwi->list, &adapter->rwi_list); 3455 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3456 reset_reason_to_string(reason)); 3457 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3458 3459 ret = 0; 3460 err: 3461 /* ibmvnic_close() below can block, so drop the lock first */ 3462 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3463 3464 if (ret == ENOMEM) 3465 ibmvnic_close(netdev); 3466 3467 return -ret; 3468 } 3469 3470 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3471 { 3472 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3473 3474 if (test_bit(0, &adapter->resetting)) { 3475 netdev_err(adapter->netdev, 3476 "Adapter is resetting, skip timeout reset\n"); 3477 return; 3478 } 3479 /* No queuing up reset until at least 5 seconds (default watchdog val) 3480 * after last reset 3481 */ 3482 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3483 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3484 return; 3485 } 3486 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3487 } 3488 3489 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3490 struct ibmvnic_rx_buff *rx_buff) 3491 { 3492 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3493 3494 rx_buff->skb = NULL; 3495 3496 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3497 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3498 3499 atomic_dec(&pool->available); 3500 } 3501 3502 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3503 { 3504 struct ibmvnic_sub_crq_queue *rx_scrq; 3505 struct ibmvnic_adapter *adapter; 3506 struct net_device *netdev; 3507 int frames_processed; 3508 int scrq_num; 3509 3510 netdev = napi->dev; 3511 adapter = netdev_priv(netdev); 3512 scrq_num = (int)(napi - adapter->napi); 3513 frames_processed = 0; 3514 rx_scrq = adapter->rx_scrq[scrq_num]; 3515 3516 restart_poll: 3517 while (frames_processed < budget) { 3518 struct sk_buff *skb; 3519 struct ibmvnic_rx_buff *rx_buff; 3520 union sub_crq *next; 3521 u32 length; 3522 u16 offset; 3523 u8 flags = 0; 3524 3525 if (unlikely(test_bit(0, &adapter->resetting) && 3526 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3527 enable_scrq_irq(adapter, rx_scrq); 3528 napi_complete_done(napi, frames_processed); 3529 return frames_processed; 3530 } 3531 3532 if (!pending_scrq(adapter, rx_scrq)) 3533 break; 3534 next = ibmvnic_next_scrq(adapter, rx_scrq); 3535 rx_buff = (struct ibmvnic_rx_buff *) 3536 be64_to_cpu(next->rx_comp.correlator); 3537 /* do error checking */ 3538 if (next->rx_comp.rc) { 3539 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3540 be16_to_cpu(next->rx_comp.rc)); 3541 /* free the entry */ 3542 next->rx_comp.first = 0; 3543 dev_kfree_skb_any(rx_buff->skb); 3544 remove_buff_from_pool(adapter, rx_buff); 3545 continue; 3546 } else if (!rx_buff->skb) { 3547 /* free the entry */ 3548 next->rx_comp.first = 0; 3549 remove_buff_from_pool(adapter, rx_buff); 3550 continue; 3551 } 3552 3553 length = be32_to_cpu(next->rx_comp.len); 3554 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3555 flags = next->rx_comp.flags; 3556 skb = rx_buff->skb; 3557 /* load long_term_buff before copying to skb */ 3558 dma_rmb(); 3559 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3560 length); 3561 3562 /* VLAN Header has been stripped by the system firmware and 3563 * needs to be inserted by the driver 3564 */ 3565 if (adapter->rx_vlan_header_insertion && 3566 (flags & IBMVNIC_VLAN_STRIPPED)) 3567 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3568 ntohs(next->rx_comp.vlan_tci)); 3569 3570 /* free the entry */ 3571 next->rx_comp.first = 0; 3572 remove_buff_from_pool(adapter, rx_buff); 3573 3574 skb_put(skb, length); 3575 skb->protocol = eth_type_trans(skb, netdev); 3576 skb_record_rx_queue(skb, scrq_num); 3577 3578 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3579 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3580 skb->ip_summed = CHECKSUM_UNNECESSARY; 3581 } 3582 3583 length = skb->len; 3584 napi_gro_receive(napi, skb); /* send it up */ 3585 netdev->stats.rx_packets++; 3586 netdev->stats.rx_bytes += length; 3587 adapter->rx_stats_buffers[scrq_num].packets++; 3588 adapter->rx_stats_buffers[scrq_num].bytes += length; 3589 frames_processed++; 3590 } 3591 3592 if (adapter->state != VNIC_CLOSING && 3593 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 3594 adapter->req_rx_add_entries_per_subcrq / 2) || 3595 frames_processed < budget)) 3596 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3597 if (frames_processed < budget) { 3598 if (napi_complete_done(napi, frames_processed)) { 3599 enable_scrq_irq(adapter, rx_scrq); 3600 if (pending_scrq(adapter, rx_scrq)) { 3601 if (napi_reschedule(napi)) { 3602 disable_scrq_irq(adapter, rx_scrq); 3603 goto restart_poll; 3604 } 3605 } 3606 } 3607 } 3608 return frames_processed; 3609 } 3610 3611 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3612 { 3613 int rc, ret; 3614 3615 adapter->fallback.mtu = adapter->req_mtu; 3616 adapter->fallback.rx_queues = adapter->req_rx_queues; 3617 adapter->fallback.tx_queues = adapter->req_tx_queues; 3618 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3619 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3620 3621 reinit_completion(&adapter->reset_done); 3622 adapter->wait_for_reset = true; 3623 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3624 3625 if (rc) { 3626 ret = rc; 3627 goto out; 3628 } 3629 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3630 if (rc) { 3631 ret = -ENODEV; 3632 goto out; 3633 } 3634 3635 ret = 0; 3636 if (adapter->reset_done_rc) { 3637 ret = -EIO; 3638 adapter->desired.mtu = adapter->fallback.mtu; 3639 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3640 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3641 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3642 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3643 3644 reinit_completion(&adapter->reset_done); 3645 adapter->wait_for_reset = true; 3646 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3647 if (rc) { 3648 ret = rc; 3649 goto out; 3650 } 3651 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3652 60000); 3653 if (rc) { 3654 ret = -ENODEV; 3655 goto out; 3656 } 3657 } 3658 out: 3659 adapter->wait_for_reset = false; 3660 3661 return ret; 3662 } 3663 3664 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3665 { 3666 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3667 3668 adapter->desired.mtu = new_mtu + ETH_HLEN; 3669 3670 return wait_for_reset(adapter); 3671 } 3672 3673 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3674 struct net_device *dev, 3675 netdev_features_t features) 3676 { 3677 /* Some backing hardware adapters can not 3678 * handle packets with a MSS less than 224 3679 * or with only one segment. 3680 */ 3681 if (skb_is_gso(skb)) { 3682 if (skb_shinfo(skb)->gso_size < 224 || 3683 skb_shinfo(skb)->gso_segs == 1) 3684 features &= ~NETIF_F_GSO_MASK; 3685 } 3686 3687 return features; 3688 } 3689 3690 static const struct net_device_ops ibmvnic_netdev_ops = { 3691 .ndo_open = ibmvnic_open, 3692 .ndo_stop = ibmvnic_close, 3693 .ndo_start_xmit = ibmvnic_xmit, 3694 .ndo_set_rx_mode = ibmvnic_set_multi, 3695 .ndo_set_mac_address = ibmvnic_set_mac, 3696 .ndo_validate_addr = eth_validate_addr, 3697 .ndo_tx_timeout = ibmvnic_tx_timeout, 3698 .ndo_change_mtu = ibmvnic_change_mtu, 3699 .ndo_features_check = ibmvnic_features_check, 3700 }; 3701 3702 /* ethtool functions */ 3703 3704 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3705 struct ethtool_link_ksettings *cmd) 3706 { 3707 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3708 int rc; 3709 3710 rc = send_query_phys_parms(adapter); 3711 if (rc) { 3712 adapter->speed = SPEED_UNKNOWN; 3713 adapter->duplex = DUPLEX_UNKNOWN; 3714 } 3715 cmd->base.speed = adapter->speed; 3716 cmd->base.duplex = adapter->duplex; 3717 cmd->base.port = PORT_FIBRE; 3718 cmd->base.phy_address = 0; 3719 cmd->base.autoneg = AUTONEG_ENABLE; 3720 3721 return 0; 3722 } 3723 3724 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3725 struct ethtool_drvinfo *info) 3726 { 3727 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3728 3729 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3730 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3731 strscpy(info->fw_version, adapter->fw_version, 3732 sizeof(info->fw_version)); 3733 } 3734 3735 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3736 { 3737 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3738 3739 return adapter->msg_enable; 3740 } 3741 3742 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3743 { 3744 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3745 3746 adapter->msg_enable = data; 3747 } 3748 3749 static u32 ibmvnic_get_link(struct net_device *netdev) 3750 { 3751 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3752 3753 /* Don't need to send a query because we request a logical link up at 3754 * init and then we wait for link state indications 3755 */ 3756 return adapter->logical_link_state; 3757 } 3758 3759 static void ibmvnic_get_ringparam(struct net_device *netdev, 3760 struct ethtool_ringparam *ring, 3761 struct kernel_ethtool_ringparam *kernel_ring, 3762 struct netlink_ext_ack *extack) 3763 { 3764 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3765 3766 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3767 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3768 ring->rx_mini_max_pending = 0; 3769 ring->rx_jumbo_max_pending = 0; 3770 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3771 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3772 ring->rx_mini_pending = 0; 3773 ring->rx_jumbo_pending = 0; 3774 } 3775 3776 static int ibmvnic_set_ringparam(struct net_device *netdev, 3777 struct ethtool_ringparam *ring, 3778 struct kernel_ethtool_ringparam *kernel_ring, 3779 struct netlink_ext_ack *extack) 3780 { 3781 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3782 3783 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3784 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3785 netdev_err(netdev, "Invalid request.\n"); 3786 netdev_err(netdev, "Max tx buffers = %llu\n", 3787 adapter->max_rx_add_entries_per_subcrq); 3788 netdev_err(netdev, "Max rx buffers = %llu\n", 3789 adapter->max_tx_entries_per_subcrq); 3790 return -EINVAL; 3791 } 3792 3793 adapter->desired.rx_entries = ring->rx_pending; 3794 adapter->desired.tx_entries = ring->tx_pending; 3795 3796 return wait_for_reset(adapter); 3797 } 3798 3799 static void ibmvnic_get_channels(struct net_device *netdev, 3800 struct ethtool_channels *channels) 3801 { 3802 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3803 3804 channels->max_rx = adapter->max_rx_queues; 3805 channels->max_tx = adapter->max_tx_queues; 3806 channels->max_other = 0; 3807 channels->max_combined = 0; 3808 channels->rx_count = adapter->req_rx_queues; 3809 channels->tx_count = adapter->req_tx_queues; 3810 channels->other_count = 0; 3811 channels->combined_count = 0; 3812 } 3813 3814 static int ibmvnic_set_channels(struct net_device *netdev, 3815 struct ethtool_channels *channels) 3816 { 3817 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3818 3819 adapter->desired.rx_queues = channels->rx_count; 3820 adapter->desired.tx_queues = channels->tx_count; 3821 3822 return wait_for_reset(adapter); 3823 } 3824 3825 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3826 { 3827 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3828 int i; 3829 3830 if (stringset != ETH_SS_STATS) 3831 return; 3832 3833 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 3834 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3835 3836 for (i = 0; i < adapter->req_tx_queues; i++) { 3837 snprintf(data, ETH_GSTRING_LEN, "tx%d_batched_packets", i); 3838 data += ETH_GSTRING_LEN; 3839 3840 snprintf(data, ETH_GSTRING_LEN, "tx%d_direct_packets", i); 3841 data += ETH_GSTRING_LEN; 3842 3843 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3844 data += ETH_GSTRING_LEN; 3845 3846 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 3847 data += ETH_GSTRING_LEN; 3848 } 3849 3850 for (i = 0; i < adapter->req_rx_queues; i++) { 3851 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3852 data += ETH_GSTRING_LEN; 3853 3854 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3855 data += ETH_GSTRING_LEN; 3856 3857 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3858 data += ETH_GSTRING_LEN; 3859 } 3860 } 3861 3862 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3863 { 3864 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3865 3866 switch (sset) { 3867 case ETH_SS_STATS: 3868 return ARRAY_SIZE(ibmvnic_stats) + 3869 adapter->req_tx_queues * NUM_TX_STATS + 3870 adapter->req_rx_queues * NUM_RX_STATS; 3871 default: 3872 return -EOPNOTSUPP; 3873 } 3874 } 3875 3876 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3877 struct ethtool_stats *stats, u64 *data) 3878 { 3879 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3880 union ibmvnic_crq crq; 3881 int i, j; 3882 int rc; 3883 3884 memset(&crq, 0, sizeof(crq)); 3885 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3886 crq.request_statistics.cmd = REQUEST_STATISTICS; 3887 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3888 crq.request_statistics.len = 3889 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3890 3891 /* Wait for data to be written */ 3892 reinit_completion(&adapter->stats_done); 3893 rc = ibmvnic_send_crq(adapter, &crq); 3894 if (rc) 3895 return; 3896 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3897 if (rc) 3898 return; 3899 3900 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3901 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3902 (adapter, ibmvnic_stats[i].offset)); 3903 3904 for (j = 0; j < adapter->req_tx_queues; j++) { 3905 data[i] = adapter->tx_stats_buffers[j].batched_packets; 3906 i++; 3907 data[i] = adapter->tx_stats_buffers[j].direct_packets; 3908 i++; 3909 data[i] = adapter->tx_stats_buffers[j].bytes; 3910 i++; 3911 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3912 i++; 3913 } 3914 3915 for (j = 0; j < adapter->req_rx_queues; j++) { 3916 data[i] = adapter->rx_stats_buffers[j].packets; 3917 i++; 3918 data[i] = adapter->rx_stats_buffers[j].bytes; 3919 i++; 3920 data[i] = adapter->rx_stats_buffers[j].interrupts; 3921 i++; 3922 } 3923 } 3924 3925 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3926 .get_drvinfo = ibmvnic_get_drvinfo, 3927 .get_msglevel = ibmvnic_get_msglevel, 3928 .set_msglevel = ibmvnic_set_msglevel, 3929 .get_link = ibmvnic_get_link, 3930 .get_ringparam = ibmvnic_get_ringparam, 3931 .set_ringparam = ibmvnic_set_ringparam, 3932 .get_channels = ibmvnic_get_channels, 3933 .set_channels = ibmvnic_set_channels, 3934 .get_strings = ibmvnic_get_strings, 3935 .get_sset_count = ibmvnic_get_sset_count, 3936 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3937 .get_link_ksettings = ibmvnic_get_link_ksettings, 3938 }; 3939 3940 /* Routines for managing CRQs/sCRQs */ 3941 3942 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3943 struct ibmvnic_sub_crq_queue *scrq) 3944 { 3945 int rc; 3946 3947 if (!scrq) { 3948 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3949 return -EINVAL; 3950 } 3951 3952 if (scrq->irq) { 3953 free_irq(scrq->irq, scrq); 3954 irq_dispose_mapping(scrq->irq); 3955 scrq->irq = 0; 3956 } 3957 3958 if (scrq->msgs) { 3959 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3960 atomic_set(&scrq->used, 0); 3961 scrq->cur = 0; 3962 scrq->ind_buf.index = 0; 3963 } else { 3964 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3965 return -EINVAL; 3966 } 3967 3968 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3969 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3970 return rc; 3971 } 3972 3973 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3974 { 3975 int i, rc; 3976 3977 if (!adapter->tx_scrq || !adapter->rx_scrq) 3978 return -EINVAL; 3979 3980 ibmvnic_clean_affinity(adapter); 3981 3982 for (i = 0; i < adapter->req_tx_queues; i++) { 3983 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3984 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3985 if (rc) 3986 return rc; 3987 } 3988 3989 for (i = 0; i < adapter->req_rx_queues; i++) { 3990 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3991 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3992 if (rc) 3993 return rc; 3994 } 3995 3996 return rc; 3997 } 3998 3999 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 4000 struct ibmvnic_sub_crq_queue *scrq, 4001 bool do_h_free) 4002 { 4003 struct device *dev = &adapter->vdev->dev; 4004 long rc; 4005 4006 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 4007 4008 if (do_h_free) { 4009 /* Close the sub-crqs */ 4010 do { 4011 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4012 adapter->vdev->unit_address, 4013 scrq->crq_num); 4014 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4015 4016 if (rc) { 4017 netdev_err(adapter->netdev, 4018 "Failed to release sub-CRQ %16lx, rc = %ld\n", 4019 scrq->crq_num, rc); 4020 } 4021 } 4022 4023 dma_free_coherent(dev, 4024 IBMVNIC_IND_ARR_SZ, 4025 scrq->ind_buf.indir_arr, 4026 scrq->ind_buf.indir_dma); 4027 4028 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4029 DMA_BIDIRECTIONAL); 4030 free_pages((unsigned long)scrq->msgs, 2); 4031 free_cpumask_var(scrq->affinity_mask); 4032 kfree(scrq); 4033 } 4034 4035 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 4036 *adapter) 4037 { 4038 struct device *dev = &adapter->vdev->dev; 4039 struct ibmvnic_sub_crq_queue *scrq; 4040 int rc; 4041 4042 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 4043 if (!scrq) 4044 return NULL; 4045 4046 scrq->msgs = 4047 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 4048 if (!scrq->msgs) { 4049 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 4050 goto zero_page_failed; 4051 } 4052 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 4053 goto cpumask_alloc_failed; 4054 4055 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 4056 DMA_BIDIRECTIONAL); 4057 if (dma_mapping_error(dev, scrq->msg_token)) { 4058 dev_warn(dev, "Couldn't map crq queue messages page\n"); 4059 goto map_failed; 4060 } 4061 4062 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4063 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 4064 4065 if (rc == H_RESOURCE) 4066 rc = ibmvnic_reset_crq(adapter); 4067 4068 if (rc == H_CLOSED) { 4069 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 4070 } else if (rc) { 4071 dev_warn(dev, "Error %d registering sub-crq\n", rc); 4072 goto reg_failed; 4073 } 4074 4075 scrq->adapter = adapter; 4076 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 4077 scrq->ind_buf.index = 0; 4078 4079 scrq->ind_buf.indir_arr = 4080 dma_alloc_coherent(dev, 4081 IBMVNIC_IND_ARR_SZ, 4082 &scrq->ind_buf.indir_dma, 4083 GFP_KERNEL); 4084 4085 if (!scrq->ind_buf.indir_arr) 4086 goto indir_failed; 4087 4088 spin_lock_init(&scrq->lock); 4089 4090 netdev_dbg(adapter->netdev, 4091 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4092 scrq->crq_num, scrq->hw_irq, scrq->irq); 4093 4094 return scrq; 4095 4096 indir_failed: 4097 do { 4098 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4099 adapter->vdev->unit_address, 4100 scrq->crq_num); 4101 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4102 reg_failed: 4103 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4104 DMA_BIDIRECTIONAL); 4105 map_failed: 4106 free_cpumask_var(scrq->affinity_mask); 4107 cpumask_alloc_failed: 4108 free_pages((unsigned long)scrq->msgs, 2); 4109 zero_page_failed: 4110 kfree(scrq); 4111 4112 return NULL; 4113 } 4114 4115 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4116 { 4117 int i; 4118 4119 ibmvnic_clean_affinity(adapter); 4120 if (adapter->tx_scrq) { 4121 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4122 if (!adapter->tx_scrq[i]) 4123 continue; 4124 4125 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4126 i); 4127 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4128 if (adapter->tx_scrq[i]->irq) { 4129 free_irq(adapter->tx_scrq[i]->irq, 4130 adapter->tx_scrq[i]); 4131 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4132 adapter->tx_scrq[i]->irq = 0; 4133 } 4134 4135 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4136 do_h_free); 4137 } 4138 4139 kfree(adapter->tx_scrq); 4140 adapter->tx_scrq = NULL; 4141 adapter->num_active_tx_scrqs = 0; 4142 } 4143 4144 /* Clean any remaining outstanding SKBs 4145 * we freed the irq so we won't be hearing 4146 * from them 4147 */ 4148 clean_tx_pools(adapter); 4149 4150 if (adapter->rx_scrq) { 4151 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4152 if (!adapter->rx_scrq[i]) 4153 continue; 4154 4155 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4156 i); 4157 if (adapter->rx_scrq[i]->irq) { 4158 free_irq(adapter->rx_scrq[i]->irq, 4159 adapter->rx_scrq[i]); 4160 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4161 adapter->rx_scrq[i]->irq = 0; 4162 } 4163 4164 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4165 do_h_free); 4166 } 4167 4168 kfree(adapter->rx_scrq); 4169 adapter->rx_scrq = NULL; 4170 adapter->num_active_rx_scrqs = 0; 4171 } 4172 } 4173 4174 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4175 struct ibmvnic_sub_crq_queue *scrq) 4176 { 4177 struct device *dev = &adapter->vdev->dev; 4178 unsigned long rc; 4179 4180 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4181 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4182 if (rc) 4183 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4184 scrq->hw_irq, rc); 4185 return rc; 4186 } 4187 4188 /* We can not use the IRQ chip EOI handler because that has the 4189 * unintended effect of changing the interrupt priority. 4190 */ 4191 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4192 { 4193 u64 val = 0xff000000 | scrq->hw_irq; 4194 unsigned long rc; 4195 4196 rc = plpar_hcall_norets(H_EOI, val); 4197 if (rc) 4198 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4199 } 4200 4201 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4202 * transmit or receive queue just prior to a partition migration. 4203 * Force an EOI after migration. 4204 */ 4205 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4206 struct ibmvnic_sub_crq_queue *scrq) 4207 { 4208 if (!xive_enabled()) 4209 ibmvnic_xics_eoi(dev, scrq); 4210 } 4211 4212 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4213 struct ibmvnic_sub_crq_queue *scrq) 4214 { 4215 struct device *dev = &adapter->vdev->dev; 4216 unsigned long rc; 4217 4218 if (scrq->hw_irq > 0x100000000ULL) { 4219 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4220 return 1; 4221 } 4222 4223 if (test_bit(0, &adapter->resetting) && 4224 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4225 ibmvnic_clear_pending_interrupt(dev, scrq); 4226 } 4227 4228 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4229 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4230 if (rc) 4231 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4232 scrq->hw_irq, rc); 4233 return rc; 4234 } 4235 4236 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4237 struct ibmvnic_sub_crq_queue *scrq) 4238 { 4239 struct device *dev = &adapter->vdev->dev; 4240 struct ibmvnic_tx_pool *tx_pool; 4241 struct ibmvnic_tx_buff *txbuff; 4242 struct netdev_queue *txq; 4243 union sub_crq *next; 4244 int index; 4245 int i; 4246 4247 restart_loop: 4248 while (pending_scrq(adapter, scrq)) { 4249 unsigned int pool = scrq->pool_index; 4250 int num_entries = 0; 4251 int total_bytes = 0; 4252 int num_packets = 0; 4253 4254 next = ibmvnic_next_scrq(adapter, scrq); 4255 for (i = 0; i < next->tx_comp.num_comps; i++) { 4256 index = be32_to_cpu(next->tx_comp.correlators[i]); 4257 if (index & IBMVNIC_TSO_POOL_MASK) { 4258 tx_pool = &adapter->tso_pool[pool]; 4259 index &= ~IBMVNIC_TSO_POOL_MASK; 4260 } else { 4261 tx_pool = &adapter->tx_pool[pool]; 4262 } 4263 4264 txbuff = &tx_pool->tx_buff[index]; 4265 num_packets++; 4266 num_entries += txbuff->num_entries; 4267 if (txbuff->skb) { 4268 total_bytes += txbuff->skb->len; 4269 if (next->tx_comp.rcs[i]) { 4270 dev_err(dev, "tx error %x\n", 4271 next->tx_comp.rcs[i]); 4272 dev_kfree_skb_irq(txbuff->skb); 4273 } else { 4274 dev_consume_skb_irq(txbuff->skb); 4275 } 4276 txbuff->skb = NULL; 4277 } else { 4278 netdev_warn(adapter->netdev, 4279 "TX completion received with NULL socket buffer\n"); 4280 } 4281 tx_pool->free_map[tx_pool->producer_index] = index; 4282 tx_pool->producer_index = 4283 (tx_pool->producer_index + 1) % 4284 tx_pool->num_buffers; 4285 } 4286 /* remove tx_comp scrq*/ 4287 next->tx_comp.first = 0; 4288 4289 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4290 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4291 4292 if (atomic_sub_return(num_entries, &scrq->used) <= 4293 (adapter->req_tx_entries_per_subcrq / 2) && 4294 __netif_subqueue_stopped(adapter->netdev, 4295 scrq->pool_index)) { 4296 rcu_read_lock(); 4297 if (adapter->tx_queues_active) { 4298 netif_wake_subqueue(adapter->netdev, 4299 scrq->pool_index); 4300 netdev_dbg(adapter->netdev, 4301 "Started queue %d\n", 4302 scrq->pool_index); 4303 } 4304 rcu_read_unlock(); 4305 } 4306 } 4307 4308 enable_scrq_irq(adapter, scrq); 4309 4310 if (pending_scrq(adapter, scrq)) { 4311 disable_scrq_irq(adapter, scrq); 4312 goto restart_loop; 4313 } 4314 4315 return 0; 4316 } 4317 4318 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4319 { 4320 struct ibmvnic_sub_crq_queue *scrq = instance; 4321 struct ibmvnic_adapter *adapter = scrq->adapter; 4322 4323 disable_scrq_irq(adapter, scrq); 4324 ibmvnic_complete_tx(adapter, scrq); 4325 4326 return IRQ_HANDLED; 4327 } 4328 4329 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4330 { 4331 struct ibmvnic_sub_crq_queue *scrq = instance; 4332 struct ibmvnic_adapter *adapter = scrq->adapter; 4333 4334 /* When booting a kdump kernel we can hit pending interrupts 4335 * prior to completing driver initialization. 4336 */ 4337 if (unlikely(adapter->state != VNIC_OPEN)) 4338 return IRQ_NONE; 4339 4340 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4341 4342 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4343 disable_scrq_irq(adapter, scrq); 4344 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4345 } 4346 4347 return IRQ_HANDLED; 4348 } 4349 4350 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4351 { 4352 struct device *dev = &adapter->vdev->dev; 4353 struct ibmvnic_sub_crq_queue *scrq; 4354 int i = 0, j = 0; 4355 int rc = 0; 4356 4357 for (i = 0; i < adapter->req_tx_queues; i++) { 4358 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4359 i); 4360 scrq = adapter->tx_scrq[i]; 4361 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4362 4363 if (!scrq->irq) { 4364 rc = -EINVAL; 4365 dev_err(dev, "Error mapping irq\n"); 4366 goto req_tx_irq_failed; 4367 } 4368 4369 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4370 adapter->vdev->unit_address, i); 4371 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4372 0, scrq->name, scrq); 4373 4374 if (rc) { 4375 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4376 scrq->irq, rc); 4377 irq_dispose_mapping(scrq->irq); 4378 goto req_tx_irq_failed; 4379 } 4380 } 4381 4382 for (i = 0; i < adapter->req_rx_queues; i++) { 4383 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4384 i); 4385 scrq = adapter->rx_scrq[i]; 4386 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4387 if (!scrq->irq) { 4388 rc = -EINVAL; 4389 dev_err(dev, "Error mapping irq\n"); 4390 goto req_rx_irq_failed; 4391 } 4392 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4393 adapter->vdev->unit_address, i); 4394 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4395 0, scrq->name, scrq); 4396 if (rc) { 4397 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4398 scrq->irq, rc); 4399 irq_dispose_mapping(scrq->irq); 4400 goto req_rx_irq_failed; 4401 } 4402 } 4403 4404 cpus_read_lock(); 4405 ibmvnic_set_affinity(adapter); 4406 cpus_read_unlock(); 4407 4408 return rc; 4409 4410 req_rx_irq_failed: 4411 for (j = 0; j < i; j++) { 4412 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4413 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4414 } 4415 i = adapter->req_tx_queues; 4416 req_tx_irq_failed: 4417 for (j = 0; j < i; j++) { 4418 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4419 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4420 } 4421 release_sub_crqs(adapter, 1); 4422 return rc; 4423 } 4424 4425 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4426 { 4427 struct device *dev = &adapter->vdev->dev; 4428 struct ibmvnic_sub_crq_queue **allqueues; 4429 int registered_queues = 0; 4430 int total_queues; 4431 int more = 0; 4432 int i; 4433 4434 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4435 4436 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4437 if (!allqueues) 4438 return -ENOMEM; 4439 4440 for (i = 0; i < total_queues; i++) { 4441 allqueues[i] = init_sub_crq_queue(adapter); 4442 if (!allqueues[i]) { 4443 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4444 break; 4445 } 4446 registered_queues++; 4447 } 4448 4449 /* Make sure we were able to register the minimum number of queues */ 4450 if (registered_queues < 4451 adapter->min_tx_queues + adapter->min_rx_queues) { 4452 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4453 goto tx_failed; 4454 } 4455 4456 /* Distribute the failed allocated queues*/ 4457 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4458 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4459 switch (i % 3) { 4460 case 0: 4461 if (adapter->req_rx_queues > adapter->min_rx_queues) 4462 adapter->req_rx_queues--; 4463 else 4464 more++; 4465 break; 4466 case 1: 4467 if (adapter->req_tx_queues > adapter->min_tx_queues) 4468 adapter->req_tx_queues--; 4469 else 4470 more++; 4471 break; 4472 } 4473 } 4474 4475 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4476 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4477 if (!adapter->tx_scrq) 4478 goto tx_failed; 4479 4480 for (i = 0; i < adapter->req_tx_queues; i++) { 4481 adapter->tx_scrq[i] = allqueues[i]; 4482 adapter->tx_scrq[i]->pool_index = i; 4483 adapter->num_active_tx_scrqs++; 4484 } 4485 4486 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4487 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4488 if (!adapter->rx_scrq) 4489 goto rx_failed; 4490 4491 for (i = 0; i < adapter->req_rx_queues; i++) { 4492 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4493 adapter->rx_scrq[i]->scrq_num = i; 4494 adapter->num_active_rx_scrqs++; 4495 } 4496 4497 kfree(allqueues); 4498 return 0; 4499 4500 rx_failed: 4501 kfree(adapter->tx_scrq); 4502 adapter->tx_scrq = NULL; 4503 tx_failed: 4504 for (i = 0; i < registered_queues; i++) 4505 release_sub_crq_queue(adapter, allqueues[i], 1); 4506 kfree(allqueues); 4507 return -ENOMEM; 4508 } 4509 4510 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4511 { 4512 struct device *dev = &adapter->vdev->dev; 4513 union ibmvnic_crq crq; 4514 int max_entries; 4515 int cap_reqs; 4516 4517 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4518 * the PROMISC flag). Initialize this count upfront. When the tasklet 4519 * receives a response to all of these, it will send the next protocol 4520 * message (QUERY_IP_OFFLOAD). 4521 */ 4522 if (!(adapter->netdev->flags & IFF_PROMISC) || 4523 adapter->promisc_supported) 4524 cap_reqs = 7; 4525 else 4526 cap_reqs = 6; 4527 4528 if (!retry) { 4529 /* Sub-CRQ entries are 32 byte long */ 4530 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4531 4532 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4533 4534 if (adapter->min_tx_entries_per_subcrq > entries_page || 4535 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4536 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4537 return; 4538 } 4539 4540 if (adapter->desired.mtu) 4541 adapter->req_mtu = adapter->desired.mtu; 4542 else 4543 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4544 4545 if (!adapter->desired.tx_entries) 4546 adapter->desired.tx_entries = 4547 adapter->max_tx_entries_per_subcrq; 4548 if (!adapter->desired.rx_entries) 4549 adapter->desired.rx_entries = 4550 adapter->max_rx_add_entries_per_subcrq; 4551 4552 max_entries = IBMVNIC_LTB_SET_SIZE / 4553 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4554 4555 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4556 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4557 adapter->desired.tx_entries = max_entries; 4558 } 4559 4560 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4561 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4562 adapter->desired.rx_entries = max_entries; 4563 } 4564 4565 if (adapter->desired.tx_entries) 4566 adapter->req_tx_entries_per_subcrq = 4567 adapter->desired.tx_entries; 4568 else 4569 adapter->req_tx_entries_per_subcrq = 4570 adapter->max_tx_entries_per_subcrq; 4571 4572 if (adapter->desired.rx_entries) 4573 adapter->req_rx_add_entries_per_subcrq = 4574 adapter->desired.rx_entries; 4575 else 4576 adapter->req_rx_add_entries_per_subcrq = 4577 adapter->max_rx_add_entries_per_subcrq; 4578 4579 if (adapter->desired.tx_queues) 4580 adapter->req_tx_queues = 4581 adapter->desired.tx_queues; 4582 else 4583 adapter->req_tx_queues = 4584 adapter->opt_tx_comp_sub_queues; 4585 4586 if (adapter->desired.rx_queues) 4587 adapter->req_rx_queues = 4588 adapter->desired.rx_queues; 4589 else 4590 adapter->req_rx_queues = 4591 adapter->opt_rx_comp_queues; 4592 4593 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4594 } else { 4595 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4596 } 4597 memset(&crq, 0, sizeof(crq)); 4598 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4599 crq.request_capability.cmd = REQUEST_CAPABILITY; 4600 4601 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4602 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4603 cap_reqs--; 4604 ibmvnic_send_crq(adapter, &crq); 4605 4606 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4607 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4608 cap_reqs--; 4609 ibmvnic_send_crq(adapter, &crq); 4610 4611 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4612 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4613 cap_reqs--; 4614 ibmvnic_send_crq(adapter, &crq); 4615 4616 crq.request_capability.capability = 4617 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4618 crq.request_capability.number = 4619 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4620 cap_reqs--; 4621 ibmvnic_send_crq(adapter, &crq); 4622 4623 crq.request_capability.capability = 4624 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4625 crq.request_capability.number = 4626 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4627 cap_reqs--; 4628 ibmvnic_send_crq(adapter, &crq); 4629 4630 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4631 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4632 cap_reqs--; 4633 ibmvnic_send_crq(adapter, &crq); 4634 4635 if (adapter->netdev->flags & IFF_PROMISC) { 4636 if (adapter->promisc_supported) { 4637 crq.request_capability.capability = 4638 cpu_to_be16(PROMISC_REQUESTED); 4639 crq.request_capability.number = cpu_to_be64(1); 4640 cap_reqs--; 4641 ibmvnic_send_crq(adapter, &crq); 4642 } 4643 } else { 4644 crq.request_capability.capability = 4645 cpu_to_be16(PROMISC_REQUESTED); 4646 crq.request_capability.number = cpu_to_be64(0); 4647 cap_reqs--; 4648 ibmvnic_send_crq(adapter, &crq); 4649 } 4650 4651 /* Keep at end to catch any discrepancy between expected and actual 4652 * CRQs sent. 4653 */ 4654 WARN_ON(cap_reqs != 0); 4655 } 4656 4657 static int pending_scrq(struct ibmvnic_adapter *adapter, 4658 struct ibmvnic_sub_crq_queue *scrq) 4659 { 4660 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4661 int rc; 4662 4663 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4664 4665 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4666 * contents of the SCRQ descriptor 4667 */ 4668 dma_rmb(); 4669 4670 return rc; 4671 } 4672 4673 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4674 struct ibmvnic_sub_crq_queue *scrq) 4675 { 4676 union sub_crq *entry; 4677 unsigned long flags; 4678 4679 spin_lock_irqsave(&scrq->lock, flags); 4680 entry = &scrq->msgs[scrq->cur]; 4681 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4682 if (++scrq->cur == scrq->size) 4683 scrq->cur = 0; 4684 } else { 4685 entry = NULL; 4686 } 4687 spin_unlock_irqrestore(&scrq->lock, flags); 4688 4689 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4690 * contents of the SCRQ descriptor 4691 */ 4692 dma_rmb(); 4693 4694 return entry; 4695 } 4696 4697 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4698 { 4699 struct ibmvnic_crq_queue *queue = &adapter->crq; 4700 union ibmvnic_crq *crq; 4701 4702 crq = &queue->msgs[queue->cur]; 4703 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4704 if (++queue->cur == queue->size) 4705 queue->cur = 0; 4706 } else { 4707 crq = NULL; 4708 } 4709 4710 return crq; 4711 } 4712 4713 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4714 { 4715 switch (rc) { 4716 case H_PARAMETER: 4717 dev_warn_ratelimited(dev, 4718 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4719 func, rc); 4720 break; 4721 case H_CLOSED: 4722 dev_warn_ratelimited(dev, 4723 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4724 func, rc); 4725 break; 4726 default: 4727 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4728 break; 4729 } 4730 } 4731 4732 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4733 u64 remote_handle, u64 ioba, u64 num_entries) 4734 { 4735 unsigned int ua = adapter->vdev->unit_address; 4736 struct device *dev = &adapter->vdev->dev; 4737 int rc; 4738 4739 /* Make sure the hypervisor sees the complete request */ 4740 dma_wmb(); 4741 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4742 cpu_to_be64(remote_handle), 4743 ioba, num_entries); 4744 4745 if (rc) 4746 print_subcrq_error(dev, rc, __func__); 4747 4748 return rc; 4749 } 4750 4751 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4752 union ibmvnic_crq *crq) 4753 { 4754 unsigned int ua = adapter->vdev->unit_address; 4755 struct device *dev = &adapter->vdev->dev; 4756 u64 *u64_crq = (u64 *)crq; 4757 int rc; 4758 4759 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4760 (unsigned long)cpu_to_be64(u64_crq[0]), 4761 (unsigned long)cpu_to_be64(u64_crq[1])); 4762 4763 if (!adapter->crq.active && 4764 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4765 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4766 return -EINVAL; 4767 } 4768 4769 /* Make sure the hypervisor sees the complete request */ 4770 dma_wmb(); 4771 4772 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4773 cpu_to_be64(u64_crq[0]), 4774 cpu_to_be64(u64_crq[1])); 4775 4776 if (rc) { 4777 if (rc == H_CLOSED) { 4778 dev_warn(dev, "CRQ Queue closed\n"); 4779 /* do not reset, report the fail, wait for passive init from server */ 4780 } 4781 4782 dev_warn(dev, "Send error (rc=%d)\n", rc); 4783 } 4784 4785 return rc; 4786 } 4787 4788 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4789 { 4790 struct device *dev = &adapter->vdev->dev; 4791 union ibmvnic_crq crq; 4792 int retries = 100; 4793 int rc; 4794 4795 memset(&crq, 0, sizeof(crq)); 4796 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4797 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4798 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4799 4800 do { 4801 rc = ibmvnic_send_crq(adapter, &crq); 4802 if (rc != H_CLOSED) 4803 break; 4804 retries--; 4805 msleep(50); 4806 4807 } while (retries > 0); 4808 4809 if (rc) { 4810 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4811 return rc; 4812 } 4813 4814 return 0; 4815 } 4816 4817 struct vnic_login_client_data { 4818 u8 type; 4819 __be16 len; 4820 char name[]; 4821 } __packed; 4822 4823 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4824 { 4825 int len; 4826 4827 /* Calculate the amount of buffer space needed for the 4828 * vnic client data in the login buffer. There are four entries, 4829 * OS name, LPAR name, device name, and a null last entry. 4830 */ 4831 len = 4 * sizeof(struct vnic_login_client_data); 4832 len += 6; /* "Linux" plus NULL */ 4833 len += strlen(utsname()->nodename) + 1; 4834 len += strlen(adapter->netdev->name) + 1; 4835 4836 return len; 4837 } 4838 4839 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4840 struct vnic_login_client_data *vlcd) 4841 { 4842 const char *os_name = "Linux"; 4843 int len; 4844 4845 /* Type 1 - LPAR OS */ 4846 vlcd->type = 1; 4847 len = strlen(os_name) + 1; 4848 vlcd->len = cpu_to_be16(len); 4849 strscpy(vlcd->name, os_name, len); 4850 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4851 4852 /* Type 2 - LPAR name */ 4853 vlcd->type = 2; 4854 len = strlen(utsname()->nodename) + 1; 4855 vlcd->len = cpu_to_be16(len); 4856 strscpy(vlcd->name, utsname()->nodename, len); 4857 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4858 4859 /* Type 3 - device name */ 4860 vlcd->type = 3; 4861 len = strlen(adapter->netdev->name) + 1; 4862 vlcd->len = cpu_to_be16(len); 4863 strscpy(vlcd->name, adapter->netdev->name, len); 4864 } 4865 4866 static int send_login(struct ibmvnic_adapter *adapter) 4867 { 4868 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4869 struct ibmvnic_login_buffer *login_buffer; 4870 struct device *dev = &adapter->vdev->dev; 4871 struct vnic_login_client_data *vlcd; 4872 dma_addr_t rsp_buffer_token; 4873 dma_addr_t buffer_token; 4874 size_t rsp_buffer_size; 4875 union ibmvnic_crq crq; 4876 int client_data_len; 4877 size_t buffer_size; 4878 __be64 *tx_list_p; 4879 __be64 *rx_list_p; 4880 int rc; 4881 int i; 4882 4883 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4884 netdev_err(adapter->netdev, 4885 "RX or TX queues are not allocated, device login failed\n"); 4886 return -ENOMEM; 4887 } 4888 4889 release_login_buffer(adapter); 4890 release_login_rsp_buffer(adapter); 4891 4892 client_data_len = vnic_client_data_len(adapter); 4893 4894 buffer_size = 4895 sizeof(struct ibmvnic_login_buffer) + 4896 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4897 client_data_len; 4898 4899 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4900 if (!login_buffer) 4901 goto buf_alloc_failed; 4902 4903 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4904 DMA_TO_DEVICE); 4905 if (dma_mapping_error(dev, buffer_token)) { 4906 dev_err(dev, "Couldn't map login buffer\n"); 4907 goto buf_map_failed; 4908 } 4909 4910 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4911 sizeof(u64) * adapter->req_tx_queues + 4912 sizeof(u64) * adapter->req_rx_queues + 4913 sizeof(u64) * adapter->req_rx_queues + 4914 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4915 4916 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4917 if (!login_rsp_buffer) 4918 goto buf_rsp_alloc_failed; 4919 4920 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4921 rsp_buffer_size, DMA_FROM_DEVICE); 4922 if (dma_mapping_error(dev, rsp_buffer_token)) { 4923 dev_err(dev, "Couldn't map login rsp buffer\n"); 4924 goto buf_rsp_map_failed; 4925 } 4926 4927 adapter->login_buf = login_buffer; 4928 adapter->login_buf_token = buffer_token; 4929 adapter->login_buf_sz = buffer_size; 4930 adapter->login_rsp_buf = login_rsp_buffer; 4931 adapter->login_rsp_buf_token = rsp_buffer_token; 4932 adapter->login_rsp_buf_sz = rsp_buffer_size; 4933 4934 login_buffer->len = cpu_to_be32(buffer_size); 4935 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4936 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4937 login_buffer->off_txcomp_subcrqs = 4938 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4939 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4940 login_buffer->off_rxcomp_subcrqs = 4941 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4942 sizeof(u64) * adapter->req_tx_queues); 4943 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4944 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4945 4946 tx_list_p = (__be64 *)((char *)login_buffer + 4947 sizeof(struct ibmvnic_login_buffer)); 4948 rx_list_p = (__be64 *)((char *)login_buffer + 4949 sizeof(struct ibmvnic_login_buffer) + 4950 sizeof(u64) * adapter->req_tx_queues); 4951 4952 for (i = 0; i < adapter->req_tx_queues; i++) { 4953 if (adapter->tx_scrq[i]) { 4954 tx_list_p[i] = 4955 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4956 } 4957 } 4958 4959 for (i = 0; i < adapter->req_rx_queues; i++) { 4960 if (adapter->rx_scrq[i]) { 4961 rx_list_p[i] = 4962 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4963 } 4964 } 4965 4966 /* Insert vNIC login client data */ 4967 vlcd = (struct vnic_login_client_data *) 4968 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4969 login_buffer->client_data_offset = 4970 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4971 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4972 4973 vnic_add_client_data(adapter, vlcd); 4974 4975 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4976 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4977 netdev_dbg(adapter->netdev, "%016lx\n", 4978 ((unsigned long *)(adapter->login_buf))[i]); 4979 } 4980 4981 memset(&crq, 0, sizeof(crq)); 4982 crq.login.first = IBMVNIC_CRQ_CMD; 4983 crq.login.cmd = LOGIN; 4984 crq.login.ioba = cpu_to_be32(buffer_token); 4985 crq.login.len = cpu_to_be32(buffer_size); 4986 4987 adapter->login_pending = true; 4988 rc = ibmvnic_send_crq(adapter, &crq); 4989 if (rc) { 4990 adapter->login_pending = false; 4991 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4992 goto buf_send_failed; 4993 } 4994 4995 return 0; 4996 4997 buf_send_failed: 4998 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4999 DMA_FROM_DEVICE); 5000 buf_rsp_map_failed: 5001 kfree(login_rsp_buffer); 5002 adapter->login_rsp_buf = NULL; 5003 buf_rsp_alloc_failed: 5004 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 5005 buf_map_failed: 5006 kfree(login_buffer); 5007 adapter->login_buf = NULL; 5008 buf_alloc_failed: 5009 return -ENOMEM; 5010 } 5011 5012 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 5013 u32 len, u8 map_id) 5014 { 5015 union ibmvnic_crq crq; 5016 5017 memset(&crq, 0, sizeof(crq)); 5018 crq.request_map.first = IBMVNIC_CRQ_CMD; 5019 crq.request_map.cmd = REQUEST_MAP; 5020 crq.request_map.map_id = map_id; 5021 crq.request_map.ioba = cpu_to_be32(addr); 5022 crq.request_map.len = cpu_to_be32(len); 5023 return ibmvnic_send_crq(adapter, &crq); 5024 } 5025 5026 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 5027 { 5028 union ibmvnic_crq crq; 5029 5030 memset(&crq, 0, sizeof(crq)); 5031 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 5032 crq.request_unmap.cmd = REQUEST_UNMAP; 5033 crq.request_unmap.map_id = map_id; 5034 return ibmvnic_send_crq(adapter, &crq); 5035 } 5036 5037 static void send_query_map(struct ibmvnic_adapter *adapter) 5038 { 5039 union ibmvnic_crq crq; 5040 5041 memset(&crq, 0, sizeof(crq)); 5042 crq.query_map.first = IBMVNIC_CRQ_CMD; 5043 crq.query_map.cmd = QUERY_MAP; 5044 ibmvnic_send_crq(adapter, &crq); 5045 } 5046 5047 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 5048 static void send_query_cap(struct ibmvnic_adapter *adapter) 5049 { 5050 union ibmvnic_crq crq; 5051 int cap_reqs; 5052 5053 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 5054 * upfront. When the tasklet receives a response to all of these, it 5055 * can send out the next protocol messaage (REQUEST_CAPABILITY). 5056 */ 5057 cap_reqs = 25; 5058 5059 atomic_set(&adapter->running_cap_crqs, cap_reqs); 5060 5061 memset(&crq, 0, sizeof(crq)); 5062 crq.query_capability.first = IBMVNIC_CRQ_CMD; 5063 crq.query_capability.cmd = QUERY_CAPABILITY; 5064 5065 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 5066 ibmvnic_send_crq(adapter, &crq); 5067 cap_reqs--; 5068 5069 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 5070 ibmvnic_send_crq(adapter, &crq); 5071 cap_reqs--; 5072 5073 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 5074 ibmvnic_send_crq(adapter, &crq); 5075 cap_reqs--; 5076 5077 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 5078 ibmvnic_send_crq(adapter, &crq); 5079 cap_reqs--; 5080 5081 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 5082 ibmvnic_send_crq(adapter, &crq); 5083 cap_reqs--; 5084 5085 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 5086 ibmvnic_send_crq(adapter, &crq); 5087 cap_reqs--; 5088 5089 crq.query_capability.capability = 5090 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5091 ibmvnic_send_crq(adapter, &crq); 5092 cap_reqs--; 5093 5094 crq.query_capability.capability = 5095 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5096 ibmvnic_send_crq(adapter, &crq); 5097 cap_reqs--; 5098 5099 crq.query_capability.capability = 5100 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5101 ibmvnic_send_crq(adapter, &crq); 5102 cap_reqs--; 5103 5104 crq.query_capability.capability = 5105 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5106 ibmvnic_send_crq(adapter, &crq); 5107 cap_reqs--; 5108 5109 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5110 ibmvnic_send_crq(adapter, &crq); 5111 cap_reqs--; 5112 5113 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5114 ibmvnic_send_crq(adapter, &crq); 5115 cap_reqs--; 5116 5117 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5118 ibmvnic_send_crq(adapter, &crq); 5119 cap_reqs--; 5120 5121 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5122 ibmvnic_send_crq(adapter, &crq); 5123 cap_reqs--; 5124 5125 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5126 ibmvnic_send_crq(adapter, &crq); 5127 cap_reqs--; 5128 5129 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5130 ibmvnic_send_crq(adapter, &crq); 5131 cap_reqs--; 5132 5133 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5134 ibmvnic_send_crq(adapter, &crq); 5135 cap_reqs--; 5136 5137 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5138 ibmvnic_send_crq(adapter, &crq); 5139 cap_reqs--; 5140 5141 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5142 ibmvnic_send_crq(adapter, &crq); 5143 cap_reqs--; 5144 5145 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5146 ibmvnic_send_crq(adapter, &crq); 5147 cap_reqs--; 5148 5149 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5150 ibmvnic_send_crq(adapter, &crq); 5151 cap_reqs--; 5152 5153 crq.query_capability.capability = 5154 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5155 ibmvnic_send_crq(adapter, &crq); 5156 cap_reqs--; 5157 5158 crq.query_capability.capability = 5159 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5160 ibmvnic_send_crq(adapter, &crq); 5161 cap_reqs--; 5162 5163 crq.query_capability.capability = 5164 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5165 ibmvnic_send_crq(adapter, &crq); 5166 cap_reqs--; 5167 5168 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5169 5170 ibmvnic_send_crq(adapter, &crq); 5171 cap_reqs--; 5172 5173 /* Keep at end to catch any discrepancy between expected and actual 5174 * CRQs sent. 5175 */ 5176 WARN_ON(cap_reqs != 0); 5177 } 5178 5179 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5180 { 5181 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5182 struct device *dev = &adapter->vdev->dev; 5183 union ibmvnic_crq crq; 5184 5185 adapter->ip_offload_tok = 5186 dma_map_single(dev, 5187 &adapter->ip_offload_buf, 5188 buf_sz, 5189 DMA_FROM_DEVICE); 5190 5191 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5192 if (!firmware_has_feature(FW_FEATURE_CMO)) 5193 dev_err(dev, "Couldn't map offload buffer\n"); 5194 return; 5195 } 5196 5197 memset(&crq, 0, sizeof(crq)); 5198 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5199 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5200 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5201 crq.query_ip_offload.ioba = 5202 cpu_to_be32(adapter->ip_offload_tok); 5203 5204 ibmvnic_send_crq(adapter, &crq); 5205 } 5206 5207 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5208 { 5209 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5210 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5211 struct device *dev = &adapter->vdev->dev; 5212 netdev_features_t old_hw_features = 0; 5213 union ibmvnic_crq crq; 5214 5215 adapter->ip_offload_ctrl_tok = 5216 dma_map_single(dev, 5217 ctrl_buf, 5218 sizeof(adapter->ip_offload_ctrl), 5219 DMA_TO_DEVICE); 5220 5221 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5222 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5223 return; 5224 } 5225 5226 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5227 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5228 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5229 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5230 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5231 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5232 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5233 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5234 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5235 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5236 5237 /* large_rx disabled for now, additional features needed */ 5238 ctrl_buf->large_rx_ipv4 = 0; 5239 ctrl_buf->large_rx_ipv6 = 0; 5240 5241 if (adapter->state != VNIC_PROBING) { 5242 old_hw_features = adapter->netdev->hw_features; 5243 adapter->netdev->hw_features = 0; 5244 } 5245 5246 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5247 5248 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5249 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5250 5251 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5252 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5253 5254 if ((adapter->netdev->features & 5255 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5256 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5257 5258 if (buf->large_tx_ipv4) 5259 adapter->netdev->hw_features |= NETIF_F_TSO; 5260 if (buf->large_tx_ipv6) 5261 adapter->netdev->hw_features |= NETIF_F_TSO6; 5262 5263 if (adapter->state == VNIC_PROBING) { 5264 adapter->netdev->features |= adapter->netdev->hw_features; 5265 } else if (old_hw_features != adapter->netdev->hw_features) { 5266 netdev_features_t tmp = 0; 5267 5268 /* disable features no longer supported */ 5269 adapter->netdev->features &= adapter->netdev->hw_features; 5270 /* turn on features now supported if previously enabled */ 5271 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5272 adapter->netdev->hw_features; 5273 adapter->netdev->features |= 5274 tmp & adapter->netdev->wanted_features; 5275 } 5276 5277 memset(&crq, 0, sizeof(crq)); 5278 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5279 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5280 crq.control_ip_offload.len = 5281 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5282 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5283 ibmvnic_send_crq(adapter, &crq); 5284 } 5285 5286 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5287 struct ibmvnic_adapter *adapter) 5288 { 5289 struct device *dev = &adapter->vdev->dev; 5290 5291 if (crq->get_vpd_size_rsp.rc.code) { 5292 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5293 crq->get_vpd_size_rsp.rc.code); 5294 complete(&adapter->fw_done); 5295 return; 5296 } 5297 5298 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5299 complete(&adapter->fw_done); 5300 } 5301 5302 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5303 struct ibmvnic_adapter *adapter) 5304 { 5305 struct device *dev = &adapter->vdev->dev; 5306 unsigned char *substr = NULL; 5307 u8 fw_level_len = 0; 5308 5309 memset(adapter->fw_version, 0, 32); 5310 5311 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5312 DMA_FROM_DEVICE); 5313 5314 if (crq->get_vpd_rsp.rc.code) { 5315 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5316 crq->get_vpd_rsp.rc.code); 5317 goto complete; 5318 } 5319 5320 /* get the position of the firmware version info 5321 * located after the ASCII 'RM' substring in the buffer 5322 */ 5323 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5324 if (!substr) { 5325 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5326 goto complete; 5327 } 5328 5329 /* get length of firmware level ASCII substring */ 5330 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5331 fw_level_len = *(substr + 2); 5332 } else { 5333 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5334 goto complete; 5335 } 5336 5337 /* copy firmware version string from vpd into adapter */ 5338 if ((substr + 3 + fw_level_len) < 5339 (adapter->vpd->buff + adapter->vpd->len)) { 5340 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 5341 } else { 5342 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5343 } 5344 5345 complete: 5346 if (adapter->fw_version[0] == '\0') 5347 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5348 complete(&adapter->fw_done); 5349 } 5350 5351 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5352 { 5353 struct device *dev = &adapter->vdev->dev; 5354 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5355 int i; 5356 5357 dma_unmap_single(dev, adapter->ip_offload_tok, 5358 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5359 5360 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5361 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5362 netdev_dbg(adapter->netdev, "%016lx\n", 5363 ((unsigned long *)(buf))[i]); 5364 5365 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5366 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5367 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5368 buf->tcp_ipv4_chksum); 5369 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5370 buf->tcp_ipv6_chksum); 5371 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5372 buf->udp_ipv4_chksum); 5373 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5374 buf->udp_ipv6_chksum); 5375 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5376 buf->large_tx_ipv4); 5377 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5378 buf->large_tx_ipv6); 5379 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5380 buf->large_rx_ipv4); 5381 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5382 buf->large_rx_ipv6); 5383 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5384 buf->max_ipv4_header_size); 5385 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5386 buf->max_ipv6_header_size); 5387 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5388 buf->max_tcp_header_size); 5389 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5390 buf->max_udp_header_size); 5391 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5392 buf->max_large_tx_size); 5393 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5394 buf->max_large_rx_size); 5395 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5396 buf->ipv6_extension_header); 5397 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5398 buf->tcp_pseudosum_req); 5399 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5400 buf->num_ipv6_ext_headers); 5401 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5402 buf->off_ipv6_ext_headers); 5403 5404 send_control_ip_offload(adapter); 5405 } 5406 5407 static const char *ibmvnic_fw_err_cause(u16 cause) 5408 { 5409 switch (cause) { 5410 case ADAPTER_PROBLEM: 5411 return "adapter problem"; 5412 case BUS_PROBLEM: 5413 return "bus problem"; 5414 case FW_PROBLEM: 5415 return "firmware problem"; 5416 case DD_PROBLEM: 5417 return "device driver problem"; 5418 case EEH_RECOVERY: 5419 return "EEH recovery"; 5420 case FW_UPDATED: 5421 return "firmware updated"; 5422 case LOW_MEMORY: 5423 return "low Memory"; 5424 default: 5425 return "unknown"; 5426 } 5427 } 5428 5429 static void handle_error_indication(union ibmvnic_crq *crq, 5430 struct ibmvnic_adapter *adapter) 5431 { 5432 struct device *dev = &adapter->vdev->dev; 5433 u16 cause; 5434 5435 cause = be16_to_cpu(crq->error_indication.error_cause); 5436 5437 dev_warn_ratelimited(dev, 5438 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5439 crq->error_indication.flags 5440 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5441 ibmvnic_fw_err_cause(cause)); 5442 5443 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5444 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5445 else 5446 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5447 } 5448 5449 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5450 struct ibmvnic_adapter *adapter) 5451 { 5452 struct net_device *netdev = adapter->netdev; 5453 struct device *dev = &adapter->vdev->dev; 5454 long rc; 5455 5456 rc = crq->change_mac_addr_rsp.rc.code; 5457 if (rc) { 5458 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5459 goto out; 5460 } 5461 /* crq->change_mac_addr.mac_addr is the requested one 5462 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5463 */ 5464 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5465 ether_addr_copy(adapter->mac_addr, 5466 &crq->change_mac_addr_rsp.mac_addr[0]); 5467 out: 5468 complete(&adapter->fw_done); 5469 return rc; 5470 } 5471 5472 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5473 struct ibmvnic_adapter *adapter) 5474 { 5475 struct device *dev = &adapter->vdev->dev; 5476 u64 *req_value; 5477 char *name; 5478 5479 atomic_dec(&adapter->running_cap_crqs); 5480 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5481 atomic_read(&adapter->running_cap_crqs)); 5482 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5483 case REQ_TX_QUEUES: 5484 req_value = &adapter->req_tx_queues; 5485 name = "tx"; 5486 break; 5487 case REQ_RX_QUEUES: 5488 req_value = &adapter->req_rx_queues; 5489 name = "rx"; 5490 break; 5491 case REQ_RX_ADD_QUEUES: 5492 req_value = &adapter->req_rx_add_queues; 5493 name = "rx_add"; 5494 break; 5495 case REQ_TX_ENTRIES_PER_SUBCRQ: 5496 req_value = &adapter->req_tx_entries_per_subcrq; 5497 name = "tx_entries_per_subcrq"; 5498 break; 5499 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5500 req_value = &adapter->req_rx_add_entries_per_subcrq; 5501 name = "rx_add_entries_per_subcrq"; 5502 break; 5503 case REQ_MTU: 5504 req_value = &adapter->req_mtu; 5505 name = "mtu"; 5506 break; 5507 case PROMISC_REQUESTED: 5508 req_value = &adapter->promisc; 5509 name = "promisc"; 5510 break; 5511 default: 5512 dev_err(dev, "Got invalid cap request rsp %d\n", 5513 crq->request_capability.capability); 5514 return; 5515 } 5516 5517 switch (crq->request_capability_rsp.rc.code) { 5518 case SUCCESS: 5519 break; 5520 case PARTIALSUCCESS: 5521 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5522 *req_value, 5523 (long)be64_to_cpu(crq->request_capability_rsp.number), 5524 name); 5525 5526 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5527 REQ_MTU) { 5528 pr_err("mtu of %llu is not supported. Reverting.\n", 5529 *req_value); 5530 *req_value = adapter->fallback.mtu; 5531 } else { 5532 *req_value = 5533 be64_to_cpu(crq->request_capability_rsp.number); 5534 } 5535 5536 send_request_cap(adapter, 1); 5537 return; 5538 default: 5539 dev_err(dev, "Error %d in request cap rsp\n", 5540 crq->request_capability_rsp.rc.code); 5541 return; 5542 } 5543 5544 /* Done receiving requested capabilities, query IP offload support */ 5545 if (atomic_read(&adapter->running_cap_crqs) == 0) 5546 send_query_ip_offload(adapter); 5547 } 5548 5549 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5550 struct ibmvnic_adapter *adapter) 5551 { 5552 struct device *dev = &adapter->vdev->dev; 5553 struct net_device *netdev = adapter->netdev; 5554 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5555 struct ibmvnic_login_buffer *login = adapter->login_buf; 5556 u64 *tx_handle_array; 5557 u64 *rx_handle_array; 5558 int num_tx_pools; 5559 int num_rx_pools; 5560 u64 *size_array; 5561 u32 rsp_len; 5562 int i; 5563 5564 /* CHECK: Test/set of login_pending does not need to be atomic 5565 * because only ibmvnic_tasklet tests/clears this. 5566 */ 5567 if (!adapter->login_pending) { 5568 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5569 return 0; 5570 } 5571 adapter->login_pending = false; 5572 5573 /* If the number of queues requested can't be allocated by the 5574 * server, the login response will return with code 1. We will need 5575 * to resend the login buffer with fewer queues requested. 5576 */ 5577 if (login_rsp_crq->generic.rc.code) { 5578 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5579 complete(&adapter->init_done); 5580 return 0; 5581 } 5582 5583 if (adapter->failover_pending) { 5584 adapter->init_done_rc = -EAGAIN; 5585 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5586 complete(&adapter->init_done); 5587 /* login response buffer will be released on reset */ 5588 return 0; 5589 } 5590 5591 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5592 5593 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5594 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5595 netdev_dbg(adapter->netdev, "%016lx\n", 5596 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5597 } 5598 5599 /* Sanity checks */ 5600 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5601 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5602 adapter->req_rx_add_queues != 5603 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5604 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5605 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5606 return -EIO; 5607 } 5608 5609 rsp_len = be32_to_cpu(login_rsp->len); 5610 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5611 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5612 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5613 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5614 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5615 /* This can happen if a login request times out and there are 5616 * 2 outstanding login requests sent, the LOGIN_RSP crq 5617 * could have been for the older login request. So we are 5618 * parsing the newer response buffer which may be incomplete 5619 */ 5620 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5621 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5622 return -EIO; 5623 } 5624 5625 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5626 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5627 /* variable buffer sizes are not supported, so just read the 5628 * first entry. 5629 */ 5630 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5631 5632 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5633 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5634 5635 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5636 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5637 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5638 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5639 5640 for (i = 0; i < num_tx_pools; i++) 5641 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5642 5643 for (i = 0; i < num_rx_pools; i++) 5644 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5645 5646 adapter->num_active_tx_scrqs = num_tx_pools; 5647 adapter->num_active_rx_scrqs = num_rx_pools; 5648 release_login_rsp_buffer(adapter); 5649 release_login_buffer(adapter); 5650 complete(&adapter->init_done); 5651 5652 return 0; 5653 } 5654 5655 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5656 struct ibmvnic_adapter *adapter) 5657 { 5658 struct device *dev = &adapter->vdev->dev; 5659 long rc; 5660 5661 rc = crq->request_unmap_rsp.rc.code; 5662 if (rc) 5663 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5664 } 5665 5666 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5667 struct ibmvnic_adapter *adapter) 5668 { 5669 struct net_device *netdev = adapter->netdev; 5670 struct device *dev = &adapter->vdev->dev; 5671 long rc; 5672 5673 rc = crq->query_map_rsp.rc.code; 5674 if (rc) { 5675 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5676 return; 5677 } 5678 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5679 crq->query_map_rsp.page_size, 5680 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5681 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5682 } 5683 5684 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5685 struct ibmvnic_adapter *adapter) 5686 { 5687 struct net_device *netdev = adapter->netdev; 5688 struct device *dev = &adapter->vdev->dev; 5689 long rc; 5690 5691 atomic_dec(&adapter->running_cap_crqs); 5692 netdev_dbg(netdev, "Outstanding queries: %d\n", 5693 atomic_read(&adapter->running_cap_crqs)); 5694 rc = crq->query_capability.rc.code; 5695 if (rc) { 5696 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5697 goto out; 5698 } 5699 5700 switch (be16_to_cpu(crq->query_capability.capability)) { 5701 case MIN_TX_QUEUES: 5702 adapter->min_tx_queues = 5703 be64_to_cpu(crq->query_capability.number); 5704 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5705 adapter->min_tx_queues); 5706 break; 5707 case MIN_RX_QUEUES: 5708 adapter->min_rx_queues = 5709 be64_to_cpu(crq->query_capability.number); 5710 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5711 adapter->min_rx_queues); 5712 break; 5713 case MIN_RX_ADD_QUEUES: 5714 adapter->min_rx_add_queues = 5715 be64_to_cpu(crq->query_capability.number); 5716 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5717 adapter->min_rx_add_queues); 5718 break; 5719 case MAX_TX_QUEUES: 5720 adapter->max_tx_queues = 5721 be64_to_cpu(crq->query_capability.number); 5722 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5723 adapter->max_tx_queues); 5724 break; 5725 case MAX_RX_QUEUES: 5726 adapter->max_rx_queues = 5727 be64_to_cpu(crq->query_capability.number); 5728 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5729 adapter->max_rx_queues); 5730 break; 5731 case MAX_RX_ADD_QUEUES: 5732 adapter->max_rx_add_queues = 5733 be64_to_cpu(crq->query_capability.number); 5734 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5735 adapter->max_rx_add_queues); 5736 break; 5737 case MIN_TX_ENTRIES_PER_SUBCRQ: 5738 adapter->min_tx_entries_per_subcrq = 5739 be64_to_cpu(crq->query_capability.number); 5740 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5741 adapter->min_tx_entries_per_subcrq); 5742 break; 5743 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5744 adapter->min_rx_add_entries_per_subcrq = 5745 be64_to_cpu(crq->query_capability.number); 5746 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5747 adapter->min_rx_add_entries_per_subcrq); 5748 break; 5749 case MAX_TX_ENTRIES_PER_SUBCRQ: 5750 adapter->max_tx_entries_per_subcrq = 5751 be64_to_cpu(crq->query_capability.number); 5752 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5753 adapter->max_tx_entries_per_subcrq); 5754 break; 5755 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5756 adapter->max_rx_add_entries_per_subcrq = 5757 be64_to_cpu(crq->query_capability.number); 5758 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5759 adapter->max_rx_add_entries_per_subcrq); 5760 break; 5761 case TCP_IP_OFFLOAD: 5762 adapter->tcp_ip_offload = 5763 be64_to_cpu(crq->query_capability.number); 5764 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5765 adapter->tcp_ip_offload); 5766 break; 5767 case PROMISC_SUPPORTED: 5768 adapter->promisc_supported = 5769 be64_to_cpu(crq->query_capability.number); 5770 netdev_dbg(netdev, "promisc_supported = %lld\n", 5771 adapter->promisc_supported); 5772 break; 5773 case MIN_MTU: 5774 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5775 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5776 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5777 break; 5778 case MAX_MTU: 5779 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5780 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5781 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5782 break; 5783 case MAX_MULTICAST_FILTERS: 5784 adapter->max_multicast_filters = 5785 be64_to_cpu(crq->query_capability.number); 5786 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5787 adapter->max_multicast_filters); 5788 break; 5789 case VLAN_HEADER_INSERTION: 5790 adapter->vlan_header_insertion = 5791 be64_to_cpu(crq->query_capability.number); 5792 if (adapter->vlan_header_insertion) 5793 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5794 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5795 adapter->vlan_header_insertion); 5796 break; 5797 case RX_VLAN_HEADER_INSERTION: 5798 adapter->rx_vlan_header_insertion = 5799 be64_to_cpu(crq->query_capability.number); 5800 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5801 adapter->rx_vlan_header_insertion); 5802 break; 5803 case MAX_TX_SG_ENTRIES: 5804 adapter->max_tx_sg_entries = 5805 be64_to_cpu(crq->query_capability.number); 5806 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5807 adapter->max_tx_sg_entries); 5808 break; 5809 case RX_SG_SUPPORTED: 5810 adapter->rx_sg_supported = 5811 be64_to_cpu(crq->query_capability.number); 5812 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5813 adapter->rx_sg_supported); 5814 break; 5815 case OPT_TX_COMP_SUB_QUEUES: 5816 adapter->opt_tx_comp_sub_queues = 5817 be64_to_cpu(crq->query_capability.number); 5818 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5819 adapter->opt_tx_comp_sub_queues); 5820 break; 5821 case OPT_RX_COMP_QUEUES: 5822 adapter->opt_rx_comp_queues = 5823 be64_to_cpu(crq->query_capability.number); 5824 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5825 adapter->opt_rx_comp_queues); 5826 break; 5827 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5828 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5829 be64_to_cpu(crq->query_capability.number); 5830 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5831 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5832 break; 5833 case OPT_TX_ENTRIES_PER_SUBCRQ: 5834 adapter->opt_tx_entries_per_subcrq = 5835 be64_to_cpu(crq->query_capability.number); 5836 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5837 adapter->opt_tx_entries_per_subcrq); 5838 break; 5839 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5840 adapter->opt_rxba_entries_per_subcrq = 5841 be64_to_cpu(crq->query_capability.number); 5842 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5843 adapter->opt_rxba_entries_per_subcrq); 5844 break; 5845 case TX_RX_DESC_REQ: 5846 adapter->tx_rx_desc_req = crq->query_capability.number; 5847 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5848 adapter->tx_rx_desc_req); 5849 break; 5850 5851 default: 5852 netdev_err(netdev, "Got invalid cap rsp %d\n", 5853 crq->query_capability.capability); 5854 } 5855 5856 out: 5857 if (atomic_read(&adapter->running_cap_crqs) == 0) 5858 send_request_cap(adapter, 0); 5859 } 5860 5861 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5862 { 5863 union ibmvnic_crq crq; 5864 int rc; 5865 5866 memset(&crq, 0, sizeof(crq)); 5867 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5868 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5869 5870 mutex_lock(&adapter->fw_lock); 5871 adapter->fw_done_rc = 0; 5872 reinit_completion(&adapter->fw_done); 5873 5874 rc = ibmvnic_send_crq(adapter, &crq); 5875 if (rc) { 5876 mutex_unlock(&adapter->fw_lock); 5877 return rc; 5878 } 5879 5880 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5881 if (rc) { 5882 mutex_unlock(&adapter->fw_lock); 5883 return rc; 5884 } 5885 5886 mutex_unlock(&adapter->fw_lock); 5887 return adapter->fw_done_rc ? -EIO : 0; 5888 } 5889 5890 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5891 struct ibmvnic_adapter *adapter) 5892 { 5893 struct net_device *netdev = adapter->netdev; 5894 int rc; 5895 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5896 5897 rc = crq->query_phys_parms_rsp.rc.code; 5898 if (rc) { 5899 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5900 return rc; 5901 } 5902 switch (rspeed) { 5903 case IBMVNIC_10MBPS: 5904 adapter->speed = SPEED_10; 5905 break; 5906 case IBMVNIC_100MBPS: 5907 adapter->speed = SPEED_100; 5908 break; 5909 case IBMVNIC_1GBPS: 5910 adapter->speed = SPEED_1000; 5911 break; 5912 case IBMVNIC_10GBPS: 5913 adapter->speed = SPEED_10000; 5914 break; 5915 case IBMVNIC_25GBPS: 5916 adapter->speed = SPEED_25000; 5917 break; 5918 case IBMVNIC_40GBPS: 5919 adapter->speed = SPEED_40000; 5920 break; 5921 case IBMVNIC_50GBPS: 5922 adapter->speed = SPEED_50000; 5923 break; 5924 case IBMVNIC_100GBPS: 5925 adapter->speed = SPEED_100000; 5926 break; 5927 case IBMVNIC_200GBPS: 5928 adapter->speed = SPEED_200000; 5929 break; 5930 default: 5931 if (netif_carrier_ok(netdev)) 5932 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5933 adapter->speed = SPEED_UNKNOWN; 5934 } 5935 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5936 adapter->duplex = DUPLEX_FULL; 5937 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5938 adapter->duplex = DUPLEX_HALF; 5939 else 5940 adapter->duplex = DUPLEX_UNKNOWN; 5941 5942 return rc; 5943 } 5944 5945 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5946 struct ibmvnic_adapter *adapter) 5947 { 5948 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5949 struct net_device *netdev = adapter->netdev; 5950 struct device *dev = &adapter->vdev->dev; 5951 u64 *u64_crq = (u64 *)crq; 5952 long rc; 5953 5954 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5955 (unsigned long)cpu_to_be64(u64_crq[0]), 5956 (unsigned long)cpu_to_be64(u64_crq[1])); 5957 switch (gen_crq->first) { 5958 case IBMVNIC_CRQ_INIT_RSP: 5959 switch (gen_crq->cmd) { 5960 case IBMVNIC_CRQ_INIT: 5961 dev_info(dev, "Partner initialized\n"); 5962 adapter->from_passive_init = true; 5963 /* Discard any stale login responses from prev reset. 5964 * CHECK: should we clear even on INIT_COMPLETE? 5965 */ 5966 adapter->login_pending = false; 5967 5968 if (adapter->state == VNIC_DOWN) 5969 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5970 else 5971 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5972 5973 if (rc && rc != -EBUSY) { 5974 /* We were unable to schedule the failover 5975 * reset either because the adapter was still 5976 * probing (eg: during kexec) or we could not 5977 * allocate memory. Clear the failover_pending 5978 * flag since no one else will. We ignore 5979 * EBUSY because it means either FAILOVER reset 5980 * is already scheduled or the adapter is 5981 * being removed. 5982 */ 5983 netdev_err(netdev, 5984 "Error %ld scheduling failover reset\n", 5985 rc); 5986 adapter->failover_pending = false; 5987 } 5988 5989 if (!completion_done(&adapter->init_done)) { 5990 if (!adapter->init_done_rc) 5991 adapter->init_done_rc = -EAGAIN; 5992 complete(&adapter->init_done); 5993 } 5994 5995 break; 5996 case IBMVNIC_CRQ_INIT_COMPLETE: 5997 dev_info(dev, "Partner initialization complete\n"); 5998 adapter->crq.active = true; 5999 send_version_xchg(adapter); 6000 break; 6001 default: 6002 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 6003 } 6004 return; 6005 case IBMVNIC_CRQ_XPORT_EVENT: 6006 netif_carrier_off(netdev); 6007 adapter->crq.active = false; 6008 /* terminate any thread waiting for a response 6009 * from the device 6010 */ 6011 if (!completion_done(&adapter->fw_done)) { 6012 adapter->fw_done_rc = -EIO; 6013 complete(&adapter->fw_done); 6014 } 6015 6016 /* if we got here during crq-init, retry crq-init */ 6017 if (!completion_done(&adapter->init_done)) { 6018 adapter->init_done_rc = -EAGAIN; 6019 complete(&adapter->init_done); 6020 } 6021 6022 if (!completion_done(&adapter->stats_done)) 6023 complete(&adapter->stats_done); 6024 if (test_bit(0, &adapter->resetting)) 6025 adapter->force_reset_recovery = true; 6026 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 6027 dev_info(dev, "Migrated, re-enabling adapter\n"); 6028 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 6029 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 6030 dev_info(dev, "Backing device failover detected\n"); 6031 adapter->failover_pending = true; 6032 } else { 6033 /* The adapter lost the connection */ 6034 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 6035 gen_crq->cmd); 6036 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 6037 } 6038 return; 6039 case IBMVNIC_CRQ_CMD_RSP: 6040 break; 6041 default: 6042 dev_err(dev, "Got an invalid msg type 0x%02x\n", 6043 gen_crq->first); 6044 return; 6045 } 6046 6047 switch (gen_crq->cmd) { 6048 case VERSION_EXCHANGE_RSP: 6049 rc = crq->version_exchange_rsp.rc.code; 6050 if (rc) { 6051 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 6052 break; 6053 } 6054 ibmvnic_version = 6055 be16_to_cpu(crq->version_exchange_rsp.version); 6056 dev_info(dev, "Partner protocol version is %d\n", 6057 ibmvnic_version); 6058 send_query_cap(adapter); 6059 break; 6060 case QUERY_CAPABILITY_RSP: 6061 handle_query_cap_rsp(crq, adapter); 6062 break; 6063 case QUERY_MAP_RSP: 6064 handle_query_map_rsp(crq, adapter); 6065 break; 6066 case REQUEST_MAP_RSP: 6067 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 6068 complete(&adapter->fw_done); 6069 break; 6070 case REQUEST_UNMAP_RSP: 6071 handle_request_unmap_rsp(crq, adapter); 6072 break; 6073 case REQUEST_CAPABILITY_RSP: 6074 handle_request_cap_rsp(crq, adapter); 6075 break; 6076 case LOGIN_RSP: 6077 netdev_dbg(netdev, "Got Login Response\n"); 6078 handle_login_rsp(crq, adapter); 6079 break; 6080 case LOGICAL_LINK_STATE_RSP: 6081 netdev_dbg(netdev, 6082 "Got Logical Link State Response, state: %d rc: %d\n", 6083 crq->logical_link_state_rsp.link_state, 6084 crq->logical_link_state_rsp.rc.code); 6085 adapter->logical_link_state = 6086 crq->logical_link_state_rsp.link_state; 6087 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 6088 complete(&adapter->init_done); 6089 break; 6090 case LINK_STATE_INDICATION: 6091 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6092 adapter->phys_link_state = 6093 crq->link_state_indication.phys_link_state; 6094 adapter->logical_link_state = 6095 crq->link_state_indication.logical_link_state; 6096 if (adapter->phys_link_state && adapter->logical_link_state) 6097 netif_carrier_on(netdev); 6098 else 6099 netif_carrier_off(netdev); 6100 break; 6101 case CHANGE_MAC_ADDR_RSP: 6102 netdev_dbg(netdev, "Got MAC address change Response\n"); 6103 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6104 break; 6105 case ERROR_INDICATION: 6106 netdev_dbg(netdev, "Got Error Indication\n"); 6107 handle_error_indication(crq, adapter); 6108 break; 6109 case REQUEST_STATISTICS_RSP: 6110 netdev_dbg(netdev, "Got Statistics Response\n"); 6111 complete(&adapter->stats_done); 6112 break; 6113 case QUERY_IP_OFFLOAD_RSP: 6114 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6115 handle_query_ip_offload_rsp(adapter); 6116 break; 6117 case MULTICAST_CTRL_RSP: 6118 netdev_dbg(netdev, "Got multicast control Response\n"); 6119 break; 6120 case CONTROL_IP_OFFLOAD_RSP: 6121 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6122 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6123 sizeof(adapter->ip_offload_ctrl), 6124 DMA_TO_DEVICE); 6125 complete(&adapter->init_done); 6126 break; 6127 case COLLECT_FW_TRACE_RSP: 6128 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6129 complete(&adapter->fw_done); 6130 break; 6131 case GET_VPD_SIZE_RSP: 6132 handle_vpd_size_rsp(crq, adapter); 6133 break; 6134 case GET_VPD_RSP: 6135 handle_vpd_rsp(crq, adapter); 6136 break; 6137 case QUERY_PHYS_PARMS_RSP: 6138 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6139 complete(&adapter->fw_done); 6140 break; 6141 default: 6142 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6143 gen_crq->cmd); 6144 } 6145 } 6146 6147 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6148 { 6149 struct ibmvnic_adapter *adapter = instance; 6150 6151 tasklet_schedule(&adapter->tasklet); 6152 return IRQ_HANDLED; 6153 } 6154 6155 static void ibmvnic_tasklet(struct tasklet_struct *t) 6156 { 6157 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6158 struct ibmvnic_crq_queue *queue = &adapter->crq; 6159 union ibmvnic_crq *crq; 6160 unsigned long flags; 6161 6162 spin_lock_irqsave(&queue->lock, flags); 6163 6164 /* Pull all the valid messages off the CRQ */ 6165 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6166 /* This barrier makes sure ibmvnic_next_crq()'s 6167 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6168 * before ibmvnic_handle_crq()'s 6169 * switch(gen_crq->first) and switch(gen_crq->cmd). 6170 */ 6171 dma_rmb(); 6172 ibmvnic_handle_crq(crq, adapter); 6173 crq->generic.first = 0; 6174 } 6175 6176 spin_unlock_irqrestore(&queue->lock, flags); 6177 } 6178 6179 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6180 { 6181 struct vio_dev *vdev = adapter->vdev; 6182 int rc; 6183 6184 do { 6185 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6186 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6187 6188 if (rc) 6189 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6190 6191 return rc; 6192 } 6193 6194 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6195 { 6196 struct ibmvnic_crq_queue *crq = &adapter->crq; 6197 struct device *dev = &adapter->vdev->dev; 6198 struct vio_dev *vdev = adapter->vdev; 6199 int rc; 6200 6201 /* Close the CRQ */ 6202 do { 6203 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6204 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6205 6206 /* Clean out the queue */ 6207 if (!crq->msgs) 6208 return -EINVAL; 6209 6210 memset(crq->msgs, 0, PAGE_SIZE); 6211 crq->cur = 0; 6212 crq->active = false; 6213 6214 /* And re-open it again */ 6215 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6216 crq->msg_token, PAGE_SIZE); 6217 6218 if (rc == H_CLOSED) 6219 /* Adapter is good, but other end is not ready */ 6220 dev_warn(dev, "Partner adapter not ready\n"); 6221 else if (rc != 0) 6222 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6223 6224 return rc; 6225 } 6226 6227 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6228 { 6229 struct ibmvnic_crq_queue *crq = &adapter->crq; 6230 struct vio_dev *vdev = adapter->vdev; 6231 long rc; 6232 6233 if (!crq->msgs) 6234 return; 6235 6236 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6237 free_irq(vdev->irq, adapter); 6238 tasklet_kill(&adapter->tasklet); 6239 do { 6240 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6241 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6242 6243 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6244 DMA_BIDIRECTIONAL); 6245 free_page((unsigned long)crq->msgs); 6246 crq->msgs = NULL; 6247 crq->active = false; 6248 } 6249 6250 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6251 { 6252 struct ibmvnic_crq_queue *crq = &adapter->crq; 6253 struct device *dev = &adapter->vdev->dev; 6254 struct vio_dev *vdev = adapter->vdev; 6255 int rc, retrc = -ENOMEM; 6256 6257 if (crq->msgs) 6258 return 0; 6259 6260 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6261 /* Should we allocate more than one page? */ 6262 6263 if (!crq->msgs) 6264 return -ENOMEM; 6265 6266 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6267 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6268 DMA_BIDIRECTIONAL); 6269 if (dma_mapping_error(dev, crq->msg_token)) 6270 goto map_failed; 6271 6272 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6273 crq->msg_token, PAGE_SIZE); 6274 6275 if (rc == H_RESOURCE) 6276 /* maybe kexecing and resource is busy. try a reset */ 6277 rc = ibmvnic_reset_crq(adapter); 6278 retrc = rc; 6279 6280 if (rc == H_CLOSED) { 6281 dev_warn(dev, "Partner adapter not ready\n"); 6282 } else if (rc) { 6283 dev_warn(dev, "Error %d opening adapter\n", rc); 6284 goto reg_crq_failed; 6285 } 6286 6287 retrc = 0; 6288 6289 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6290 6291 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6292 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6293 adapter->vdev->unit_address); 6294 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6295 if (rc) { 6296 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6297 vdev->irq, rc); 6298 goto req_irq_failed; 6299 } 6300 6301 rc = vio_enable_interrupts(vdev); 6302 if (rc) { 6303 dev_err(dev, "Error %d enabling interrupts\n", rc); 6304 goto req_irq_failed; 6305 } 6306 6307 crq->cur = 0; 6308 spin_lock_init(&crq->lock); 6309 6310 /* process any CRQs that were queued before we enabled interrupts */ 6311 tasklet_schedule(&adapter->tasklet); 6312 6313 return retrc; 6314 6315 req_irq_failed: 6316 tasklet_kill(&adapter->tasklet); 6317 do { 6318 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6319 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6320 reg_crq_failed: 6321 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6322 map_failed: 6323 free_page((unsigned long)crq->msgs); 6324 crq->msgs = NULL; 6325 return retrc; 6326 } 6327 6328 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6329 { 6330 struct device *dev = &adapter->vdev->dev; 6331 unsigned long timeout = msecs_to_jiffies(20000); 6332 u64 old_num_rx_queues = adapter->req_rx_queues; 6333 u64 old_num_tx_queues = adapter->req_tx_queues; 6334 int rc; 6335 6336 adapter->from_passive_init = false; 6337 6338 rc = ibmvnic_send_crq_init(adapter); 6339 if (rc) { 6340 dev_err(dev, "Send crq init failed with error %d\n", rc); 6341 return rc; 6342 } 6343 6344 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6345 dev_err(dev, "Initialization sequence timed out\n"); 6346 return -ETIMEDOUT; 6347 } 6348 6349 if (adapter->init_done_rc) { 6350 release_crq_queue(adapter); 6351 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6352 return adapter->init_done_rc; 6353 } 6354 6355 if (adapter->from_passive_init) { 6356 adapter->state = VNIC_OPEN; 6357 adapter->from_passive_init = false; 6358 dev_err(dev, "CRQ-init failed, passive-init\n"); 6359 return -EINVAL; 6360 } 6361 6362 if (reset && 6363 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6364 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6365 if (adapter->req_rx_queues != old_num_rx_queues || 6366 adapter->req_tx_queues != old_num_tx_queues) { 6367 release_sub_crqs(adapter, 0); 6368 rc = init_sub_crqs(adapter); 6369 } else { 6370 /* no need to reinitialize completely, but we do 6371 * need to clean up transmits that were in flight 6372 * when we processed the reset. Failure to do so 6373 * will confound the upper layer, usually TCP, by 6374 * creating the illusion of transmits that are 6375 * awaiting completion. 6376 */ 6377 clean_tx_pools(adapter); 6378 6379 rc = reset_sub_crq_queues(adapter); 6380 } 6381 } else { 6382 rc = init_sub_crqs(adapter); 6383 } 6384 6385 if (rc) { 6386 dev_err(dev, "Initialization of sub crqs failed\n"); 6387 release_crq_queue(adapter); 6388 return rc; 6389 } 6390 6391 rc = init_sub_crq_irqs(adapter); 6392 if (rc) { 6393 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6394 release_crq_queue(adapter); 6395 } 6396 6397 return rc; 6398 } 6399 6400 static struct device_attribute dev_attr_failover; 6401 6402 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6403 { 6404 struct ibmvnic_adapter *adapter; 6405 struct net_device *netdev; 6406 unsigned char *mac_addr_p; 6407 unsigned long flags; 6408 bool init_success; 6409 int rc; 6410 6411 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6412 dev->unit_address); 6413 6414 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6415 VETH_MAC_ADDR, NULL); 6416 if (!mac_addr_p) { 6417 dev_err(&dev->dev, 6418 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6419 __FILE__, __LINE__); 6420 return 0; 6421 } 6422 6423 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6424 IBMVNIC_MAX_QUEUES); 6425 if (!netdev) 6426 return -ENOMEM; 6427 6428 adapter = netdev_priv(netdev); 6429 adapter->state = VNIC_PROBING; 6430 dev_set_drvdata(&dev->dev, netdev); 6431 adapter->vdev = dev; 6432 adapter->netdev = netdev; 6433 adapter->login_pending = false; 6434 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6435 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6436 bitmap_set(adapter->map_ids, 0, 1); 6437 6438 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6439 eth_hw_addr_set(netdev, adapter->mac_addr); 6440 netdev->irq = dev->irq; 6441 netdev->netdev_ops = &ibmvnic_netdev_ops; 6442 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6443 SET_NETDEV_DEV(netdev, &dev->dev); 6444 6445 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6446 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6447 __ibmvnic_delayed_reset); 6448 INIT_LIST_HEAD(&adapter->rwi_list); 6449 spin_lock_init(&adapter->rwi_lock); 6450 spin_lock_init(&adapter->state_lock); 6451 mutex_init(&adapter->fw_lock); 6452 init_completion(&adapter->probe_done); 6453 init_completion(&adapter->init_done); 6454 init_completion(&adapter->fw_done); 6455 init_completion(&adapter->reset_done); 6456 init_completion(&adapter->stats_done); 6457 clear_bit(0, &adapter->resetting); 6458 adapter->prev_rx_buf_sz = 0; 6459 adapter->prev_mtu = 0; 6460 6461 init_success = false; 6462 do { 6463 reinit_init_done(adapter); 6464 6465 /* clear any failovers we got in the previous pass 6466 * since we are reinitializing the CRQ 6467 */ 6468 adapter->failover_pending = false; 6469 6470 /* If we had already initialized CRQ, we may have one or 6471 * more resets queued already. Discard those and release 6472 * the CRQ before initializing the CRQ again. 6473 */ 6474 release_crq_queue(adapter); 6475 6476 /* Since we are still in PROBING state, __ibmvnic_reset() 6477 * will not access the ->rwi_list and since we released CRQ, 6478 * we won't get _new_ transport events. But there maybe an 6479 * ongoing ibmvnic_reset() call. So serialize access to 6480 * rwi_list. If we win the race, ibvmnic_reset() could add 6481 * a reset after we purged but thats ok - we just may end 6482 * up with an extra reset (i.e similar to having two or more 6483 * resets in the queue at once). 6484 * CHECK. 6485 */ 6486 spin_lock_irqsave(&adapter->rwi_lock, flags); 6487 flush_reset_queue(adapter); 6488 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6489 6490 rc = init_crq_queue(adapter); 6491 if (rc) { 6492 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6493 rc); 6494 goto ibmvnic_init_fail; 6495 } 6496 6497 rc = ibmvnic_reset_init(adapter, false); 6498 } while (rc == -EAGAIN); 6499 6500 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6501 * partner is not ready. CRQ is not active. When the partner becomes 6502 * ready, we will do the passive init reset. 6503 */ 6504 6505 if (!rc) 6506 init_success = true; 6507 6508 rc = init_stats_buffers(adapter); 6509 if (rc) 6510 goto ibmvnic_init_fail; 6511 6512 rc = init_stats_token(adapter); 6513 if (rc) 6514 goto ibmvnic_stats_fail; 6515 6516 rc = device_create_file(&dev->dev, &dev_attr_failover); 6517 if (rc) 6518 goto ibmvnic_dev_file_err; 6519 6520 netif_carrier_off(netdev); 6521 6522 if (init_success) { 6523 adapter->state = VNIC_PROBED; 6524 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6525 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6526 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6527 } else { 6528 adapter->state = VNIC_DOWN; 6529 } 6530 6531 adapter->wait_for_reset = false; 6532 adapter->last_reset_time = jiffies; 6533 6534 rc = register_netdev(netdev); 6535 if (rc) { 6536 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6537 goto ibmvnic_register_fail; 6538 } 6539 dev_info(&dev->dev, "ibmvnic registered\n"); 6540 6541 rc = ibmvnic_cpu_notif_add(adapter); 6542 if (rc) { 6543 netdev_err(netdev, "Registering cpu notifier failed\n"); 6544 goto cpu_notif_add_failed; 6545 } 6546 6547 complete(&adapter->probe_done); 6548 6549 return 0; 6550 6551 cpu_notif_add_failed: 6552 unregister_netdev(netdev); 6553 6554 ibmvnic_register_fail: 6555 device_remove_file(&dev->dev, &dev_attr_failover); 6556 6557 ibmvnic_dev_file_err: 6558 release_stats_token(adapter); 6559 6560 ibmvnic_stats_fail: 6561 release_stats_buffers(adapter); 6562 6563 ibmvnic_init_fail: 6564 release_sub_crqs(adapter, 1); 6565 release_crq_queue(adapter); 6566 6567 /* cleanup worker thread after releasing CRQ so we don't get 6568 * transport events (i.e new work items for the worker thread). 6569 */ 6570 adapter->state = VNIC_REMOVING; 6571 complete(&adapter->probe_done); 6572 flush_work(&adapter->ibmvnic_reset); 6573 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6574 6575 flush_reset_queue(adapter); 6576 6577 mutex_destroy(&adapter->fw_lock); 6578 free_netdev(netdev); 6579 6580 return rc; 6581 } 6582 6583 static void ibmvnic_remove(struct vio_dev *dev) 6584 { 6585 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6586 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6587 unsigned long flags; 6588 6589 spin_lock_irqsave(&adapter->state_lock, flags); 6590 6591 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6592 * finish. Then, set the state to REMOVING to prevent it from 6593 * scheduling any more work and to have reset functions ignore 6594 * any resets that have already been scheduled. Drop the lock 6595 * after setting state, so __ibmvnic_reset() which is called 6596 * from the flush_work() below, can make progress. 6597 */ 6598 spin_lock(&adapter->rwi_lock); 6599 adapter->state = VNIC_REMOVING; 6600 spin_unlock(&adapter->rwi_lock); 6601 6602 spin_unlock_irqrestore(&adapter->state_lock, flags); 6603 6604 ibmvnic_cpu_notif_remove(adapter); 6605 6606 flush_work(&adapter->ibmvnic_reset); 6607 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6608 6609 rtnl_lock(); 6610 unregister_netdevice(netdev); 6611 6612 release_resources(adapter); 6613 release_rx_pools(adapter); 6614 release_tx_pools(adapter); 6615 release_sub_crqs(adapter, 1); 6616 release_crq_queue(adapter); 6617 6618 release_stats_token(adapter); 6619 release_stats_buffers(adapter); 6620 6621 adapter->state = VNIC_REMOVED; 6622 6623 rtnl_unlock(); 6624 mutex_destroy(&adapter->fw_lock); 6625 device_remove_file(&dev->dev, &dev_attr_failover); 6626 free_netdev(netdev); 6627 dev_set_drvdata(&dev->dev, NULL); 6628 } 6629 6630 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6631 const char *buf, size_t count) 6632 { 6633 struct net_device *netdev = dev_get_drvdata(dev); 6634 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6635 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6636 __be64 session_token; 6637 long rc; 6638 6639 if (!sysfs_streq(buf, "1")) 6640 return -EINVAL; 6641 6642 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6643 H_GET_SESSION_TOKEN, 0, 0, 0); 6644 if (rc) { 6645 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6646 rc); 6647 goto last_resort; 6648 } 6649 6650 session_token = (__be64)retbuf[0]; 6651 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6652 be64_to_cpu(session_token)); 6653 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6654 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6655 if (rc) { 6656 netdev_err(netdev, 6657 "H_VIOCTL initiated failover failed, rc %ld\n", 6658 rc); 6659 goto last_resort; 6660 } 6661 6662 return count; 6663 6664 last_resort: 6665 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6666 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6667 6668 return count; 6669 } 6670 static DEVICE_ATTR_WO(failover); 6671 6672 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6673 { 6674 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6675 struct ibmvnic_adapter *adapter; 6676 struct iommu_table *tbl; 6677 unsigned long ret = 0; 6678 int i; 6679 6680 tbl = get_iommu_table_base(&vdev->dev); 6681 6682 /* netdev inits at probe time along with the structures we need below*/ 6683 if (!netdev) 6684 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6685 6686 adapter = netdev_priv(netdev); 6687 6688 ret += PAGE_SIZE; /* the crq message queue */ 6689 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6690 6691 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6692 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6693 6694 for (i = 0; i < adapter->num_active_rx_pools; i++) 6695 ret += adapter->rx_pool[i].size * 6696 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6697 6698 return ret; 6699 } 6700 6701 static int ibmvnic_resume(struct device *dev) 6702 { 6703 struct net_device *netdev = dev_get_drvdata(dev); 6704 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6705 6706 if (adapter->state != VNIC_OPEN) 6707 return 0; 6708 6709 tasklet_schedule(&adapter->tasklet); 6710 6711 return 0; 6712 } 6713 6714 static const struct vio_device_id ibmvnic_device_table[] = { 6715 {"network", "IBM,vnic"}, 6716 {"", "" } 6717 }; 6718 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6719 6720 static const struct dev_pm_ops ibmvnic_pm_ops = { 6721 .resume = ibmvnic_resume 6722 }; 6723 6724 static struct vio_driver ibmvnic_driver = { 6725 .id_table = ibmvnic_device_table, 6726 .probe = ibmvnic_probe, 6727 .remove = ibmvnic_remove, 6728 .get_desired_dma = ibmvnic_get_desired_dma, 6729 .name = ibmvnic_driver_name, 6730 .pm = &ibmvnic_pm_ops, 6731 }; 6732 6733 /* module functions */ 6734 static int __init ibmvnic_module_init(void) 6735 { 6736 int ret; 6737 6738 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6739 ibmvnic_cpu_online, 6740 ibmvnic_cpu_down_prep); 6741 if (ret < 0) 6742 goto out; 6743 ibmvnic_online = ret; 6744 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6745 NULL, ibmvnic_cpu_dead); 6746 if (ret) 6747 goto err_dead; 6748 6749 ret = vio_register_driver(&ibmvnic_driver); 6750 if (ret) 6751 goto err_vio_register; 6752 6753 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6754 IBMVNIC_DRIVER_VERSION); 6755 6756 return 0; 6757 err_vio_register: 6758 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6759 err_dead: 6760 cpuhp_remove_multi_state(ibmvnic_online); 6761 out: 6762 return ret; 6763 } 6764 6765 static void __exit ibmvnic_module_exit(void) 6766 { 6767 vio_unregister_driver(&ibmvnic_driver); 6768 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6769 cpuhp_remove_multi_state(ibmvnic_online); 6770 } 6771 6772 module_init(ibmvnic_module_init); 6773 module_exit(ibmvnic_module_exit); 6774