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