1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/irqdomain.h> 57 #include <linux/kthread.h> 58 #include <linux/seq_file.h> 59 #include <linux/interrupt.h> 60 #include <net/net_namespace.h> 61 #include <asm/hvcall.h> 62 #include <linux/atomic.h> 63 #include <asm/vio.h> 64 #include <asm/xive.h> 65 #include <asm/iommu.h> 66 #include <linux/uaccess.h> 67 #include <asm/firmware.h> 68 #include <linux/workqueue.h> 69 #include <linux/if_vlan.h> 70 #include <linux/utsname.h> 71 #include <linux/cpu.h> 72 73 #include "ibmvnic.h" 74 75 static const char ibmvnic_driver_name[] = "ibmvnic"; 76 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 77 78 MODULE_AUTHOR("Santiago Leon"); 79 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 80 MODULE_LICENSE("GPL"); 81 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 82 83 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 84 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 85 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 87 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 88 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter); 101 static inline void reinit_init_done(struct ibmvnic_adapter *adapter); 102 static void send_query_map(struct ibmvnic_adapter *adapter); 103 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 104 static int send_request_unmap(struct ibmvnic_adapter *, u8); 105 static int send_login(struct ibmvnic_adapter *adapter); 106 static void send_query_cap(struct ibmvnic_adapter *adapter); 107 static int init_sub_crqs(struct ibmvnic_adapter *); 108 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 109 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 110 static void release_crq_queue(struct ibmvnic_adapter *); 111 static int __ibmvnic_set_mac(struct net_device *, u8 *); 112 static int init_crq_queue(struct ibmvnic_adapter *adapter); 113 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 114 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 115 struct ibmvnic_sub_crq_queue *tx_scrq); 116 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 117 struct ibmvnic_long_term_buff *ltb); 118 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 119 static void flush_reset_queue(struct ibmvnic_adapter *adapter); 120 static void print_subcrq_error(struct device *dev, int rc, const char *func); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 157 { 158 union ibmvnic_crq crq; 159 160 memset(&crq, 0, sizeof(crq)); 161 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 162 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 163 164 return ibmvnic_send_crq(adapter, &crq); 165 } 166 167 static int send_version_xchg(struct ibmvnic_adapter *adapter) 168 { 169 union ibmvnic_crq crq; 170 171 memset(&crq, 0, sizeof(crq)); 172 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 173 crq.version_exchange.cmd = VERSION_EXCHANGE; 174 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 175 176 return ibmvnic_send_crq(adapter, &crq); 177 } 178 179 static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter, 180 struct ibmvnic_sub_crq_queue *queue) 181 { 182 if (!(queue && queue->irq)) 183 return; 184 185 cpumask_clear(queue->affinity_mask); 186 187 if (irq_set_affinity_and_hint(queue->irq, NULL)) 188 netdev_warn(adapter->netdev, 189 "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n", 190 __func__, queue, queue->irq); 191 } 192 193 static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter) 194 { 195 struct ibmvnic_sub_crq_queue **rxqs; 196 struct ibmvnic_sub_crq_queue **txqs; 197 int num_rxqs, num_txqs; 198 int i; 199 200 rxqs = adapter->rx_scrq; 201 txqs = adapter->tx_scrq; 202 num_txqs = adapter->num_active_tx_scrqs; 203 num_rxqs = adapter->num_active_rx_scrqs; 204 205 netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__); 206 if (txqs) { 207 for (i = 0; i < num_txqs; i++) 208 ibmvnic_clean_queue_affinity(adapter, txqs[i]); 209 } 210 if (rxqs) { 211 for (i = 0; i < num_rxqs; i++) 212 ibmvnic_clean_queue_affinity(adapter, rxqs[i]); 213 } 214 } 215 216 static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue, 217 unsigned int *cpu, int *stragglers, 218 int stride) 219 { 220 cpumask_var_t mask; 221 int i; 222 int rc = 0; 223 224 if (!(queue && queue->irq)) 225 return rc; 226 227 /* cpumask_var_t is either a pointer or array, allocation works here */ 228 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 229 return -ENOMEM; 230 231 /* while we have extra cpu give one extra to this irq */ 232 if (*stragglers) { 233 stride++; 234 (*stragglers)--; 235 } 236 /* atomic write is safer than writing bit by bit directly */ 237 for (i = 0; i < stride; i++) { 238 cpumask_set_cpu(*cpu, mask); 239 *cpu = cpumask_next_wrap(*cpu, cpu_online_mask, 240 nr_cpu_ids, false); 241 } 242 /* set queue affinity mask */ 243 cpumask_copy(queue->affinity_mask, mask); 244 rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask); 245 free_cpumask_var(mask); 246 247 return rc; 248 } 249 250 /* assumes cpu read lock is held */ 251 static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter) 252 { 253 struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq; 254 struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq; 255 struct ibmvnic_sub_crq_queue *queue; 256 int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0; 257 int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0; 258 int total_queues, stride, stragglers, i; 259 unsigned int num_cpu, cpu; 260 bool is_rx_queue; 261 int rc = 0; 262 263 netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__); 264 if (!(adapter->rx_scrq && adapter->tx_scrq)) { 265 netdev_warn(adapter->netdev, 266 "%s: Set affinity failed, queues not allocated\n", 267 __func__); 268 return; 269 } 270 271 total_queues = num_rxqs + num_txqs; 272 num_cpu = num_online_cpus(); 273 /* number of cpu's assigned per irq */ 274 stride = max_t(int, num_cpu / total_queues, 1); 275 /* number of leftover cpu's */ 276 stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0; 277 /* next available cpu to assign irq to */ 278 cpu = cpumask_next(-1, cpu_online_mask); 279 280 for (i = 0; i < total_queues; i++) { 281 is_rx_queue = false; 282 /* balance core load by alternating rx and tx assignments 283 * ex: TX0 -> RX0 -> TX1 -> RX1 etc. 284 */ 285 if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) { 286 queue = rxqs[i_rxqs++]; 287 is_rx_queue = true; 288 } else { 289 queue = txqs[i_txqs++]; 290 } 291 292 rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, 293 stride); 294 if (rc) 295 goto out; 296 297 if (!queue || is_rx_queue) 298 continue; 299 300 rc = __netif_set_xps_queue(adapter->netdev, 301 cpumask_bits(queue->affinity_mask), 302 i_txqs - 1, XPS_CPUS); 303 if (rc) 304 netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n", 305 __func__, i_txqs - 1, rc); 306 } 307 308 out: 309 if (rc) { 310 netdev_warn(adapter->netdev, 311 "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n", 312 __func__, queue, queue->irq, rc); 313 ibmvnic_clean_affinity(adapter); 314 } 315 } 316 317 static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node) 318 { 319 struct ibmvnic_adapter *adapter; 320 321 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 322 ibmvnic_set_affinity(adapter); 323 return 0; 324 } 325 326 static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node) 327 { 328 struct ibmvnic_adapter *adapter; 329 330 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead); 331 ibmvnic_set_affinity(adapter); 332 return 0; 333 } 334 335 static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node) 336 { 337 struct ibmvnic_adapter *adapter; 338 339 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 340 ibmvnic_clean_affinity(adapter); 341 return 0; 342 } 343 344 static enum cpuhp_state ibmvnic_online; 345 346 static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter) 347 { 348 int ret; 349 350 ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node); 351 if (ret) 352 return ret; 353 ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD, 354 &adapter->node_dead); 355 if (!ret) 356 return ret; 357 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 358 return ret; 359 } 360 361 static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter) 362 { 363 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 364 cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD, 365 &adapter->node_dead); 366 } 367 368 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 369 unsigned long length, unsigned long *number, 370 unsigned long *irq) 371 { 372 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 373 long rc; 374 375 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 376 *number = retbuf[0]; 377 *irq = retbuf[1]; 378 379 return rc; 380 } 381 382 /** 383 * ibmvnic_wait_for_completion - Check device state and wait for completion 384 * @adapter: private device data 385 * @comp_done: completion structure to wait for 386 * @timeout: time to wait in milliseconds 387 * 388 * Wait for a completion signal or until the timeout limit is reached 389 * while checking that the device is still active. 390 */ 391 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 392 struct completion *comp_done, 393 unsigned long timeout) 394 { 395 struct net_device *netdev; 396 unsigned long div_timeout; 397 u8 retry; 398 399 netdev = adapter->netdev; 400 retry = 5; 401 div_timeout = msecs_to_jiffies(timeout / retry); 402 while (true) { 403 if (!adapter->crq.active) { 404 netdev_err(netdev, "Device down!\n"); 405 return -ENODEV; 406 } 407 if (!retry--) 408 break; 409 if (wait_for_completion_timeout(comp_done, div_timeout)) 410 return 0; 411 } 412 netdev_err(netdev, "Operation timed out.\n"); 413 return -ETIMEDOUT; 414 } 415 416 /** 417 * reuse_ltb() - Check if a long term buffer can be reused 418 * @ltb: The long term buffer to be checked 419 * @size: The size of the long term buffer. 420 * 421 * An LTB can be reused unless its size has changed. 422 * 423 * Return: Return true if the LTB can be reused, false otherwise. 424 */ 425 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 426 { 427 return (ltb->buff && ltb->size == size); 428 } 429 430 /** 431 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 432 * 433 * @adapter: ibmvnic adapter associated to the LTB 434 * @ltb: container object for the LTB 435 * @size: size of the LTB 436 * 437 * Allocate an LTB of the specified size and notify VIOS. 438 * 439 * If the given @ltb already has the correct size, reuse it. Otherwise if 440 * its non-NULL, free it. Then allocate a new one of the correct size. 441 * Notify the VIOS either way since we may now be working with a new VIOS. 442 * 443 * Allocating larger chunks of memory during resets, specially LPM or under 444 * low memory situations can cause resets to fail/timeout and for LPAR to 445 * lose connectivity. So hold onto the LTB even if we fail to communicate 446 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 447 * 448 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 449 * a negative value otherwise. 450 */ 451 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 452 struct ibmvnic_long_term_buff *ltb, int size) 453 { 454 struct device *dev = &adapter->vdev->dev; 455 u64 prev = 0; 456 int rc; 457 458 if (!reuse_ltb(ltb, size)) { 459 dev_dbg(dev, 460 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 461 ltb->size, size); 462 prev = ltb->size; 463 free_long_term_buff(adapter, ltb); 464 } 465 466 if (ltb->buff) { 467 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 468 ltb->map_id, ltb->size); 469 } else { 470 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 471 GFP_KERNEL); 472 if (!ltb->buff) { 473 dev_err(dev, "Couldn't alloc long term buffer\n"); 474 return -ENOMEM; 475 } 476 ltb->size = size; 477 478 ltb->map_id = find_first_zero_bit(adapter->map_ids, 479 MAX_MAP_ID); 480 bitmap_set(adapter->map_ids, ltb->map_id, 1); 481 482 dev_dbg(dev, 483 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", 484 ltb->map_id, ltb->size, prev); 485 } 486 487 /* Ensure ltb is zeroed - specially when reusing it. */ 488 memset(ltb->buff, 0, ltb->size); 489 490 mutex_lock(&adapter->fw_lock); 491 adapter->fw_done_rc = 0; 492 reinit_completion(&adapter->fw_done); 493 494 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 495 if (rc) { 496 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 497 goto out; 498 } 499 500 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 501 if (rc) { 502 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 503 rc); 504 goto out; 505 } 506 507 if (adapter->fw_done_rc) { 508 dev_err(dev, "Couldn't map LTB, rc = %d\n", 509 adapter->fw_done_rc); 510 rc = -EIO; 511 goto out; 512 } 513 rc = 0; 514 out: 515 /* don't free LTB on communication error - see function header */ 516 mutex_unlock(&adapter->fw_lock); 517 return rc; 518 } 519 520 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 521 struct ibmvnic_long_term_buff *ltb) 522 { 523 struct device *dev = &adapter->vdev->dev; 524 525 if (!ltb->buff) 526 return; 527 528 /* VIOS automatically unmaps the long term buffer at remote 529 * end for the following resets: 530 * FAILOVER, MOBILITY, TIMEOUT. 531 */ 532 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 533 adapter->reset_reason != VNIC_RESET_MOBILITY && 534 adapter->reset_reason != VNIC_RESET_TIMEOUT) 535 send_request_unmap(adapter, ltb->map_id); 536 537 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 538 539 ltb->buff = NULL; 540 /* mark this map_id free */ 541 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 542 ltb->map_id = 0; 543 } 544 545 /** 546 * free_ltb_set - free the given set of long term buffers (LTBS) 547 * @adapter: The ibmvnic adapter containing this ltb set 548 * @ltb_set: The ltb_set to be freed 549 * 550 * Free the set of LTBs in the given set. 551 */ 552 553 static void free_ltb_set(struct ibmvnic_adapter *adapter, 554 struct ibmvnic_ltb_set *ltb_set) 555 { 556 int i; 557 558 for (i = 0; i < ltb_set->num_ltbs; i++) 559 free_long_term_buff(adapter, <b_set->ltbs[i]); 560 561 kfree(ltb_set->ltbs); 562 ltb_set->ltbs = NULL; 563 ltb_set->num_ltbs = 0; 564 } 565 566 /** 567 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) 568 * 569 * @adapter: ibmvnic adapter associated to the LTB 570 * @ltb_set: container object for the set of LTBs 571 * @num_buffs: Number of buffers in the LTB 572 * @buff_size: Size of each buffer in the LTB 573 * 574 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size 575 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the 576 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. 577 * If new set needs more than in old set, allocate the remaining ones. 578 * Try and reuse as many LTBs as possible and avoid reallocation. 579 * 580 * Any changes to this allocation strategy must be reflected in 581 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). 582 */ 583 static int alloc_ltb_set(struct ibmvnic_adapter *adapter, 584 struct ibmvnic_ltb_set *ltb_set, int num_buffs, 585 int buff_size) 586 { 587 struct device *dev = &adapter->vdev->dev; 588 struct ibmvnic_ltb_set old_set; 589 struct ibmvnic_ltb_set new_set; 590 int rem_size; 591 int tot_size; /* size of all ltbs */ 592 int ltb_size; /* size of one ltb */ 593 int nltbs; 594 int rc; 595 int n; 596 int i; 597 598 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, 599 buff_size); 600 601 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); 602 tot_size = num_buffs * buff_size; 603 604 if (ltb_size > tot_size) 605 ltb_size = tot_size; 606 607 nltbs = tot_size / ltb_size; 608 if (tot_size % ltb_size) 609 nltbs++; 610 611 old_set = *ltb_set; 612 613 if (old_set.num_ltbs == nltbs) { 614 new_set = old_set; 615 } else { 616 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); 617 618 new_set.ltbs = kzalloc(tmp, GFP_KERNEL); 619 if (!new_set.ltbs) 620 return -ENOMEM; 621 622 new_set.num_ltbs = nltbs; 623 624 /* Free any excess ltbs in old set */ 625 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) 626 free_long_term_buff(adapter, &old_set.ltbs[i]); 627 628 /* Copy remaining ltbs to new set. All LTBs except the 629 * last one are of the same size. alloc_long_term_buff() 630 * will realloc if the size changes. 631 */ 632 n = min(old_set.num_ltbs, new_set.num_ltbs); 633 for (i = 0; i < n; i++) 634 new_set.ltbs[i] = old_set.ltbs[i]; 635 636 /* Any additional ltbs in new set will have NULL ltbs for 637 * now and will be allocated in alloc_long_term_buff(). 638 */ 639 640 /* We no longer need the old_set so free it. Note that we 641 * may have reused some ltbs from old set and freed excess 642 * ltbs above. So we only need to free the container now 643 * not the LTBs themselves. (i.e. dont free_ltb_set()!) 644 */ 645 kfree(old_set.ltbs); 646 old_set.ltbs = NULL; 647 old_set.num_ltbs = 0; 648 649 /* Install the new set. If allocations fail below, we will 650 * retry later and know what size LTBs we need. 651 */ 652 *ltb_set = new_set; 653 } 654 655 i = 0; 656 rem_size = tot_size; 657 while (rem_size) { 658 if (ltb_size > rem_size) 659 ltb_size = rem_size; 660 661 rem_size -= ltb_size; 662 663 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); 664 if (rc) 665 goto out; 666 i++; 667 } 668 669 WARN_ON(i != new_set.num_ltbs); 670 671 return 0; 672 out: 673 /* We may have allocated one/more LTBs before failing and we 674 * want to try and reuse on next reset. So don't free ltb set. 675 */ 676 return rc; 677 } 678 679 /** 680 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. 681 * @rxpool: The receive buffer pool containing buffer 682 * @bufidx: Index of buffer in rxpool 683 * @ltbp: (Output) pointer to the long term buffer containing the buffer 684 * @offset: (Output) offset of buffer in the LTB from @ltbp 685 * 686 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the 687 * pool and its corresponding offset. Assume for now that each LTB is of 688 * different size but could possibly be optimized based on the allocation 689 * strategy in alloc_ltb_set(). 690 */ 691 static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, 692 unsigned int bufidx, 693 struct ibmvnic_long_term_buff **ltbp, 694 unsigned int *offset) 695 { 696 struct ibmvnic_long_term_buff *ltb; 697 int nbufs; /* # of buffers in one ltb */ 698 int i; 699 700 WARN_ON(bufidx >= rxpool->size); 701 702 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { 703 ltb = &rxpool->ltb_set.ltbs[i]; 704 nbufs = ltb->size / rxpool->buff_size; 705 if (bufidx < nbufs) 706 break; 707 bufidx -= nbufs; 708 } 709 710 *ltbp = ltb; 711 *offset = bufidx * rxpool->buff_size; 712 } 713 714 /** 715 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. 716 * @txpool: The transmit buffer pool containing buffer 717 * @bufidx: Index of buffer in txpool 718 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer 719 * @offset: (Output) offset of buffer in the LTB from @ltbp 720 * 721 * Map the given buffer identified by [txpool, bufidx] to an LTB in the 722 * pool and its corresponding offset. 723 */ 724 static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, 725 unsigned int bufidx, 726 struct ibmvnic_long_term_buff **ltbp, 727 unsigned int *offset) 728 { 729 struct ibmvnic_long_term_buff *ltb; 730 int nbufs; /* # of buffers in one ltb */ 731 int i; 732 733 WARN_ON_ONCE(bufidx >= txpool->num_buffers); 734 735 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { 736 ltb = &txpool->ltb_set.ltbs[i]; 737 nbufs = ltb->size / txpool->buf_size; 738 if (bufidx < nbufs) 739 break; 740 bufidx -= nbufs; 741 } 742 743 *ltbp = ltb; 744 *offset = bufidx * txpool->buf_size; 745 } 746 747 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 748 { 749 int i; 750 751 for (i = 0; i < adapter->num_active_rx_pools; i++) 752 adapter->rx_pool[i].active = 0; 753 } 754 755 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 756 struct ibmvnic_rx_pool *pool) 757 { 758 int count = pool->size - atomic_read(&pool->available); 759 u64 handle = adapter->rx_scrq[pool->index]->handle; 760 struct device *dev = &adapter->vdev->dev; 761 struct ibmvnic_ind_xmit_queue *ind_bufp; 762 struct ibmvnic_sub_crq_queue *rx_scrq; 763 struct ibmvnic_long_term_buff *ltb; 764 union sub_crq *sub_crq; 765 int buffers_added = 0; 766 unsigned long lpar_rc; 767 struct sk_buff *skb; 768 unsigned int offset; 769 dma_addr_t dma_addr; 770 unsigned char *dst; 771 int shift = 0; 772 int bufidx; 773 int i; 774 775 if (!pool->active) 776 return; 777 778 rx_scrq = adapter->rx_scrq[pool->index]; 779 ind_bufp = &rx_scrq->ind_buf; 780 781 /* netdev_skb_alloc() could have failed after we saved a few skbs 782 * in the indir_buf and we would not have sent them to VIOS yet. 783 * To account for them, start the loop at ind_bufp->index rather 784 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 785 * be 0. 786 */ 787 for (i = ind_bufp->index; i < count; ++i) { 788 bufidx = pool->free_map[pool->next_free]; 789 790 /* We maybe reusing the skb from earlier resets. Allocate 791 * only if necessary. But since the LTB may have changed 792 * during reset (see init_rx_pools()), update LTB below 793 * even if reusing skb. 794 */ 795 skb = pool->rx_buff[bufidx].skb; 796 if (!skb) { 797 skb = netdev_alloc_skb(adapter->netdev, 798 pool->buff_size); 799 if (!skb) { 800 dev_err(dev, "Couldn't replenish rx buff\n"); 801 adapter->replenish_no_mem++; 802 break; 803 } 804 } 805 806 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 807 pool->next_free = (pool->next_free + 1) % pool->size; 808 809 /* Copy the skb to the long term mapped DMA buffer */ 810 map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); 811 dst = ltb->buff + offset; 812 memset(dst, 0, pool->buff_size); 813 dma_addr = ltb->addr + offset; 814 815 /* add the skb to an rx_buff in the pool */ 816 pool->rx_buff[bufidx].data = dst; 817 pool->rx_buff[bufidx].dma = dma_addr; 818 pool->rx_buff[bufidx].skb = skb; 819 pool->rx_buff[bufidx].pool_index = pool->index; 820 pool->rx_buff[bufidx].size = pool->buff_size; 821 822 /* queue the rx_buff for the next send_subcrq_indirect */ 823 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 824 memset(sub_crq, 0, sizeof(*sub_crq)); 825 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 826 sub_crq->rx_add.correlator = 827 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 828 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 829 sub_crq->rx_add.map_id = ltb->map_id; 830 831 /* The length field of the sCRQ is defined to be 24 bits so the 832 * buffer size needs to be left shifted by a byte before it is 833 * converted to big endian to prevent the last byte from being 834 * truncated. 835 */ 836 #ifdef __LITTLE_ENDIAN__ 837 shift = 8; 838 #endif 839 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 840 841 /* if send_subcrq_indirect queue is full, flush to VIOS */ 842 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 843 i == count - 1) { 844 lpar_rc = 845 send_subcrq_indirect(adapter, handle, 846 (u64)ind_bufp->indir_dma, 847 (u64)ind_bufp->index); 848 if (lpar_rc != H_SUCCESS) 849 goto failure; 850 buffers_added += ind_bufp->index; 851 adapter->replenish_add_buff_success += ind_bufp->index; 852 ind_bufp->index = 0; 853 } 854 } 855 atomic_add(buffers_added, &pool->available); 856 return; 857 858 failure: 859 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 860 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 861 for (i = ind_bufp->index - 1; i >= 0; --i) { 862 struct ibmvnic_rx_buff *rx_buff; 863 864 pool->next_free = pool->next_free == 0 ? 865 pool->size - 1 : pool->next_free - 1; 866 sub_crq = &ind_bufp->indir_arr[i]; 867 rx_buff = (struct ibmvnic_rx_buff *) 868 be64_to_cpu(sub_crq->rx_add.correlator); 869 bufidx = (int)(rx_buff - pool->rx_buff); 870 pool->free_map[pool->next_free] = bufidx; 871 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 872 pool->rx_buff[bufidx].skb = NULL; 873 } 874 adapter->replenish_add_buff_failure += ind_bufp->index; 875 atomic_add(buffers_added, &pool->available); 876 ind_bufp->index = 0; 877 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 878 /* Disable buffer pool replenishment and report carrier off if 879 * queue is closed or pending failover. 880 * Firmware guarantees that a signal will be sent to the 881 * driver, triggering a reset. 882 */ 883 deactivate_rx_pools(adapter); 884 netif_carrier_off(adapter->netdev); 885 } 886 } 887 888 static void replenish_pools(struct ibmvnic_adapter *adapter) 889 { 890 int i; 891 892 adapter->replenish_task_cycles++; 893 for (i = 0; i < adapter->num_active_rx_pools; i++) { 894 if (adapter->rx_pool[i].active) 895 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 896 } 897 898 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 899 } 900 901 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 902 { 903 kfree(adapter->tx_stats_buffers); 904 kfree(adapter->rx_stats_buffers); 905 adapter->tx_stats_buffers = NULL; 906 adapter->rx_stats_buffers = NULL; 907 } 908 909 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 910 { 911 adapter->tx_stats_buffers = 912 kcalloc(IBMVNIC_MAX_QUEUES, 913 sizeof(struct ibmvnic_tx_queue_stats), 914 GFP_KERNEL); 915 if (!adapter->tx_stats_buffers) 916 return -ENOMEM; 917 918 adapter->rx_stats_buffers = 919 kcalloc(IBMVNIC_MAX_QUEUES, 920 sizeof(struct ibmvnic_rx_queue_stats), 921 GFP_KERNEL); 922 if (!adapter->rx_stats_buffers) 923 return -ENOMEM; 924 925 return 0; 926 } 927 928 static void release_stats_token(struct ibmvnic_adapter *adapter) 929 { 930 struct device *dev = &adapter->vdev->dev; 931 932 if (!adapter->stats_token) 933 return; 934 935 dma_unmap_single(dev, adapter->stats_token, 936 sizeof(struct ibmvnic_statistics), 937 DMA_FROM_DEVICE); 938 adapter->stats_token = 0; 939 } 940 941 static int init_stats_token(struct ibmvnic_adapter *adapter) 942 { 943 struct device *dev = &adapter->vdev->dev; 944 dma_addr_t stok; 945 int rc; 946 947 stok = dma_map_single(dev, &adapter->stats, 948 sizeof(struct ibmvnic_statistics), 949 DMA_FROM_DEVICE); 950 rc = dma_mapping_error(dev, stok); 951 if (rc) { 952 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 953 return rc; 954 } 955 956 adapter->stats_token = stok; 957 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 958 return 0; 959 } 960 961 /** 962 * release_rx_pools() - Release any rx pools attached to @adapter. 963 * @adapter: ibmvnic adapter 964 * 965 * Safe to call this multiple times - even if no pools are attached. 966 */ 967 static void release_rx_pools(struct ibmvnic_adapter *adapter) 968 { 969 struct ibmvnic_rx_pool *rx_pool; 970 int i, j; 971 972 if (!adapter->rx_pool) 973 return; 974 975 for (i = 0; i < adapter->num_active_rx_pools; i++) { 976 rx_pool = &adapter->rx_pool[i]; 977 978 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 979 980 kfree(rx_pool->free_map); 981 982 free_ltb_set(adapter, &rx_pool->ltb_set); 983 984 if (!rx_pool->rx_buff) 985 continue; 986 987 for (j = 0; j < rx_pool->size; j++) { 988 if (rx_pool->rx_buff[j].skb) { 989 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 990 rx_pool->rx_buff[j].skb = NULL; 991 } 992 } 993 994 kfree(rx_pool->rx_buff); 995 } 996 997 kfree(adapter->rx_pool); 998 adapter->rx_pool = NULL; 999 adapter->num_active_rx_pools = 0; 1000 adapter->prev_rx_pool_size = 0; 1001 } 1002 1003 /** 1004 * reuse_rx_pools() - Check if the existing rx pools can be reused. 1005 * @adapter: ibmvnic adapter 1006 * 1007 * Check if the existing rx pools in the adapter can be reused. The 1008 * pools can be reused if the pool parameters (number of pools, 1009 * number of buffers in the pool and size of each buffer) have not 1010 * changed. 1011 * 1012 * NOTE: This assumes that all pools have the same number of buffers 1013 * which is the case currently. If that changes, we must fix this. 1014 * 1015 * Return: true if the rx pools can be reused, false otherwise. 1016 */ 1017 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 1018 { 1019 u64 old_num_pools, new_num_pools; 1020 u64 old_pool_size, new_pool_size; 1021 u64 old_buff_size, new_buff_size; 1022 1023 if (!adapter->rx_pool) 1024 return false; 1025 1026 old_num_pools = adapter->num_active_rx_pools; 1027 new_num_pools = adapter->req_rx_queues; 1028 1029 old_pool_size = adapter->prev_rx_pool_size; 1030 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 1031 1032 old_buff_size = adapter->prev_rx_buf_sz; 1033 new_buff_size = adapter->cur_rx_buf_sz; 1034 1035 if (old_buff_size != new_buff_size || 1036 old_num_pools != new_num_pools || 1037 old_pool_size != new_pool_size) 1038 return false; 1039 1040 return true; 1041 } 1042 1043 /** 1044 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 1045 * @netdev: net device associated with the vnic interface 1046 * 1047 * Initialize the set of receiver pools in the ibmvnic adapter associated 1048 * with the net_device @netdev. If possible, reuse the existing rx pools. 1049 * Otherwise free any existing pools and allocate a new set of pools 1050 * before initializing them. 1051 * 1052 * Return: 0 on success and negative value on error. 1053 */ 1054 static int init_rx_pools(struct net_device *netdev) 1055 { 1056 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1057 struct device *dev = &adapter->vdev->dev; 1058 struct ibmvnic_rx_pool *rx_pool; 1059 u64 num_pools; 1060 u64 pool_size; /* # of buffers in one pool */ 1061 u64 buff_size; 1062 int i, j, rc; 1063 1064 pool_size = adapter->req_rx_add_entries_per_subcrq; 1065 num_pools = adapter->req_rx_queues; 1066 buff_size = adapter->cur_rx_buf_sz; 1067 1068 if (reuse_rx_pools(adapter)) { 1069 dev_dbg(dev, "Reusing rx pools\n"); 1070 goto update_ltb; 1071 } 1072 1073 /* Allocate/populate the pools. */ 1074 release_rx_pools(adapter); 1075 1076 adapter->rx_pool = kcalloc(num_pools, 1077 sizeof(struct ibmvnic_rx_pool), 1078 GFP_KERNEL); 1079 if (!adapter->rx_pool) { 1080 dev_err(dev, "Failed to allocate rx pools\n"); 1081 return -ENOMEM; 1082 } 1083 1084 /* Set num_active_rx_pools early. If we fail below after partial 1085 * allocation, release_rx_pools() will know how many to look for. 1086 */ 1087 adapter->num_active_rx_pools = num_pools; 1088 1089 for (i = 0; i < num_pools; i++) { 1090 rx_pool = &adapter->rx_pool[i]; 1091 1092 netdev_dbg(adapter->netdev, 1093 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 1094 i, pool_size, buff_size); 1095 1096 rx_pool->size = pool_size; 1097 rx_pool->index = i; 1098 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1099 1100 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 1101 GFP_KERNEL); 1102 if (!rx_pool->free_map) { 1103 dev_err(dev, "Couldn't alloc free_map %d\n", i); 1104 rc = -ENOMEM; 1105 goto out_release; 1106 } 1107 1108 rx_pool->rx_buff = kcalloc(rx_pool->size, 1109 sizeof(struct ibmvnic_rx_buff), 1110 GFP_KERNEL); 1111 if (!rx_pool->rx_buff) { 1112 dev_err(dev, "Couldn't alloc rx buffers\n"); 1113 rc = -ENOMEM; 1114 goto out_release; 1115 } 1116 } 1117 1118 adapter->prev_rx_pool_size = pool_size; 1119 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 1120 1121 update_ltb: 1122 for (i = 0; i < num_pools; i++) { 1123 rx_pool = &adapter->rx_pool[i]; 1124 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 1125 i, rx_pool->size, rx_pool->buff_size); 1126 1127 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, 1128 rx_pool->size, rx_pool->buff_size); 1129 if (rc) 1130 goto out; 1131 1132 for (j = 0; j < rx_pool->size; ++j) { 1133 struct ibmvnic_rx_buff *rx_buff; 1134 1135 rx_pool->free_map[j] = j; 1136 1137 /* NOTE: Don't clear rx_buff->skb here - will leak 1138 * memory! replenish_rx_pool() will reuse skbs or 1139 * allocate as necessary. 1140 */ 1141 rx_buff = &rx_pool->rx_buff[j]; 1142 rx_buff->dma = 0; 1143 rx_buff->data = 0; 1144 rx_buff->size = 0; 1145 rx_buff->pool_index = 0; 1146 } 1147 1148 /* Mark pool "empty" so replenish_rx_pools() will 1149 * update the LTB info for each buffer 1150 */ 1151 atomic_set(&rx_pool->available, 0); 1152 rx_pool->next_alloc = 0; 1153 rx_pool->next_free = 0; 1154 /* replenish_rx_pool() may have called deactivate_rx_pools() 1155 * on failover. Ensure pool is active now. 1156 */ 1157 rx_pool->active = 1; 1158 } 1159 return 0; 1160 out_release: 1161 release_rx_pools(adapter); 1162 out: 1163 /* We failed to allocate one or more LTBs or map them on the VIOS. 1164 * Hold onto the pools and any LTBs that we did allocate/map. 1165 */ 1166 return rc; 1167 } 1168 1169 static void release_vpd_data(struct ibmvnic_adapter *adapter) 1170 { 1171 if (!adapter->vpd) 1172 return; 1173 1174 kfree(adapter->vpd->buff); 1175 kfree(adapter->vpd); 1176 1177 adapter->vpd = NULL; 1178 } 1179 1180 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 1181 struct ibmvnic_tx_pool *tx_pool) 1182 { 1183 kfree(tx_pool->tx_buff); 1184 kfree(tx_pool->free_map); 1185 free_ltb_set(adapter, &tx_pool->ltb_set); 1186 } 1187 1188 /** 1189 * release_tx_pools() - Release any tx pools attached to @adapter. 1190 * @adapter: ibmvnic adapter 1191 * 1192 * Safe to call this multiple times - even if no pools are attached. 1193 */ 1194 static void release_tx_pools(struct ibmvnic_adapter *adapter) 1195 { 1196 int i; 1197 1198 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 1199 * both NULL or both non-NULL. So we only need to check one. 1200 */ 1201 if (!adapter->tx_pool) 1202 return; 1203 1204 for (i = 0; i < adapter->num_active_tx_pools; i++) { 1205 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 1206 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 1207 } 1208 1209 kfree(adapter->tx_pool); 1210 adapter->tx_pool = NULL; 1211 kfree(adapter->tso_pool); 1212 adapter->tso_pool = NULL; 1213 adapter->num_active_tx_pools = 0; 1214 adapter->prev_tx_pool_size = 0; 1215 } 1216 1217 static int init_one_tx_pool(struct net_device *netdev, 1218 struct ibmvnic_tx_pool *tx_pool, 1219 int pool_size, int buf_size) 1220 { 1221 int i; 1222 1223 tx_pool->tx_buff = kcalloc(pool_size, 1224 sizeof(struct ibmvnic_tx_buff), 1225 GFP_KERNEL); 1226 if (!tx_pool->tx_buff) 1227 return -ENOMEM; 1228 1229 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 1230 if (!tx_pool->free_map) { 1231 kfree(tx_pool->tx_buff); 1232 tx_pool->tx_buff = NULL; 1233 return -ENOMEM; 1234 } 1235 1236 for (i = 0; i < pool_size; i++) 1237 tx_pool->free_map[i] = i; 1238 1239 tx_pool->consumer_index = 0; 1240 tx_pool->producer_index = 0; 1241 tx_pool->num_buffers = pool_size; 1242 tx_pool->buf_size = buf_size; 1243 1244 return 0; 1245 } 1246 1247 /** 1248 * reuse_tx_pools() - Check if the existing tx pools can be reused. 1249 * @adapter: ibmvnic adapter 1250 * 1251 * Check if the existing tx pools in the adapter can be reused. The 1252 * pools can be reused if the pool parameters (number of pools, 1253 * number of buffers in the pool and mtu) have not changed. 1254 * 1255 * NOTE: This assumes that all pools have the same number of buffers 1256 * which is the case currently. If that changes, we must fix this. 1257 * 1258 * Return: true if the tx pools can be reused, false otherwise. 1259 */ 1260 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 1261 { 1262 u64 old_num_pools, new_num_pools; 1263 u64 old_pool_size, new_pool_size; 1264 u64 old_mtu, new_mtu; 1265 1266 if (!adapter->tx_pool) 1267 return false; 1268 1269 old_num_pools = adapter->num_active_tx_pools; 1270 new_num_pools = adapter->num_active_tx_scrqs; 1271 old_pool_size = adapter->prev_tx_pool_size; 1272 new_pool_size = adapter->req_tx_entries_per_subcrq; 1273 old_mtu = adapter->prev_mtu; 1274 new_mtu = adapter->req_mtu; 1275 1276 if (old_mtu != new_mtu || 1277 old_num_pools != new_num_pools || 1278 old_pool_size != new_pool_size) 1279 return false; 1280 1281 return true; 1282 } 1283 1284 /** 1285 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 1286 * @netdev: net device associated with the vnic interface 1287 * 1288 * Initialize the set of transmit pools in the ibmvnic adapter associated 1289 * with the net_device @netdev. If possible, reuse the existing tx pools. 1290 * Otherwise free any existing pools and allocate a new set of pools 1291 * before initializing them. 1292 * 1293 * Return: 0 on success and negative value on error. 1294 */ 1295 static int init_tx_pools(struct net_device *netdev) 1296 { 1297 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1298 struct device *dev = &adapter->vdev->dev; 1299 int num_pools; 1300 u64 pool_size; /* # of buffers in pool */ 1301 u64 buff_size; 1302 int i, j, rc; 1303 1304 num_pools = adapter->req_tx_queues; 1305 1306 /* We must notify the VIOS about the LTB on all resets - but we only 1307 * need to alloc/populate pools if either the number of buffers or 1308 * size of each buffer in the pool has changed. 1309 */ 1310 if (reuse_tx_pools(adapter)) { 1311 netdev_dbg(netdev, "Reusing tx pools\n"); 1312 goto update_ltb; 1313 } 1314 1315 /* Allocate/populate the pools. */ 1316 release_tx_pools(adapter); 1317 1318 pool_size = adapter->req_tx_entries_per_subcrq; 1319 num_pools = adapter->num_active_tx_scrqs; 1320 1321 adapter->tx_pool = kcalloc(num_pools, 1322 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1323 if (!adapter->tx_pool) 1324 return -ENOMEM; 1325 1326 adapter->tso_pool = kcalloc(num_pools, 1327 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1328 /* To simplify release_tx_pools() ensure that ->tx_pool and 1329 * ->tso_pool are either both NULL or both non-NULL. 1330 */ 1331 if (!adapter->tso_pool) { 1332 kfree(adapter->tx_pool); 1333 adapter->tx_pool = NULL; 1334 return -ENOMEM; 1335 } 1336 1337 /* Set num_active_tx_pools early. If we fail below after partial 1338 * allocation, release_tx_pools() will know how many to look for. 1339 */ 1340 adapter->num_active_tx_pools = num_pools; 1341 1342 buff_size = adapter->req_mtu + VLAN_HLEN; 1343 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1344 1345 for (i = 0; i < num_pools; i++) { 1346 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 1347 i, adapter->req_tx_entries_per_subcrq, buff_size); 1348 1349 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 1350 pool_size, buff_size); 1351 if (rc) 1352 goto out_release; 1353 1354 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 1355 IBMVNIC_TSO_BUFS, 1356 IBMVNIC_TSO_BUF_SZ); 1357 if (rc) 1358 goto out_release; 1359 } 1360 1361 adapter->prev_tx_pool_size = pool_size; 1362 adapter->prev_mtu = adapter->req_mtu; 1363 1364 update_ltb: 1365 /* NOTE: All tx_pools have the same number of buffers (which is 1366 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 1367 * buffers (see calls init_one_tx_pool() for these). 1368 * For consistency, we use tx_pool->num_buffers and 1369 * tso_pool->num_buffers below. 1370 */ 1371 rc = -1; 1372 for (i = 0; i < num_pools; i++) { 1373 struct ibmvnic_tx_pool *tso_pool; 1374 struct ibmvnic_tx_pool *tx_pool; 1375 1376 tx_pool = &adapter->tx_pool[i]; 1377 1378 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", 1379 i, tx_pool->num_buffers, tx_pool->buf_size); 1380 1381 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, 1382 tx_pool->num_buffers, tx_pool->buf_size); 1383 if (rc) 1384 goto out; 1385 1386 tx_pool->consumer_index = 0; 1387 tx_pool->producer_index = 0; 1388 1389 for (j = 0; j < tx_pool->num_buffers; j++) 1390 tx_pool->free_map[j] = j; 1391 1392 tso_pool = &adapter->tso_pool[i]; 1393 1394 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", 1395 i, tso_pool->num_buffers, tso_pool->buf_size); 1396 1397 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, 1398 tso_pool->num_buffers, tso_pool->buf_size); 1399 if (rc) 1400 goto out; 1401 1402 tso_pool->consumer_index = 0; 1403 tso_pool->producer_index = 0; 1404 1405 for (j = 0; j < tso_pool->num_buffers; j++) 1406 tso_pool->free_map[j] = j; 1407 } 1408 1409 return 0; 1410 out_release: 1411 release_tx_pools(adapter); 1412 out: 1413 /* We failed to allocate one or more LTBs or map them on the VIOS. 1414 * Hold onto the pools and any LTBs that we did allocate/map. 1415 */ 1416 return rc; 1417 } 1418 1419 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1420 { 1421 int i; 1422 1423 if (adapter->napi_enabled) 1424 return; 1425 1426 for (i = 0; i < adapter->req_rx_queues; i++) 1427 napi_enable(&adapter->napi[i]); 1428 1429 adapter->napi_enabled = true; 1430 } 1431 1432 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1433 { 1434 int i; 1435 1436 if (!adapter->napi_enabled) 1437 return; 1438 1439 for (i = 0; i < adapter->req_rx_queues; i++) { 1440 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1441 napi_disable(&adapter->napi[i]); 1442 } 1443 1444 adapter->napi_enabled = false; 1445 } 1446 1447 static int init_napi(struct ibmvnic_adapter *adapter) 1448 { 1449 int i; 1450 1451 adapter->napi = kcalloc(adapter->req_rx_queues, 1452 sizeof(struct napi_struct), GFP_KERNEL); 1453 if (!adapter->napi) 1454 return -ENOMEM; 1455 1456 for (i = 0; i < adapter->req_rx_queues; i++) { 1457 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1458 netif_napi_add(adapter->netdev, &adapter->napi[i], 1459 ibmvnic_poll); 1460 } 1461 1462 adapter->num_active_rx_napi = adapter->req_rx_queues; 1463 return 0; 1464 } 1465 1466 static void release_napi(struct ibmvnic_adapter *adapter) 1467 { 1468 int i; 1469 1470 if (!adapter->napi) 1471 return; 1472 1473 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1474 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1475 netif_napi_del(&adapter->napi[i]); 1476 } 1477 1478 kfree(adapter->napi); 1479 adapter->napi = NULL; 1480 adapter->num_active_rx_napi = 0; 1481 adapter->napi_enabled = false; 1482 } 1483 1484 static const char *adapter_state_to_string(enum vnic_state state) 1485 { 1486 switch (state) { 1487 case VNIC_PROBING: 1488 return "PROBING"; 1489 case VNIC_PROBED: 1490 return "PROBED"; 1491 case VNIC_OPENING: 1492 return "OPENING"; 1493 case VNIC_OPEN: 1494 return "OPEN"; 1495 case VNIC_CLOSING: 1496 return "CLOSING"; 1497 case VNIC_CLOSED: 1498 return "CLOSED"; 1499 case VNIC_REMOVING: 1500 return "REMOVING"; 1501 case VNIC_REMOVED: 1502 return "REMOVED"; 1503 case VNIC_DOWN: 1504 return "DOWN"; 1505 } 1506 return "UNKNOWN"; 1507 } 1508 1509 static int ibmvnic_login(struct net_device *netdev) 1510 { 1511 unsigned long flags, timeout = msecs_to_jiffies(20000); 1512 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1513 int retry_count = 0; 1514 int retries = 10; 1515 bool retry; 1516 int rc; 1517 1518 do { 1519 retry = false; 1520 if (retry_count > retries) { 1521 netdev_warn(netdev, "Login attempts exceeded\n"); 1522 return -EACCES; 1523 } 1524 1525 adapter->init_done_rc = 0; 1526 reinit_completion(&adapter->init_done); 1527 rc = send_login(adapter); 1528 if (rc) 1529 return rc; 1530 1531 if (!wait_for_completion_timeout(&adapter->init_done, 1532 timeout)) { 1533 netdev_warn(netdev, "Login timed out\n"); 1534 adapter->login_pending = false; 1535 goto partial_reset; 1536 } 1537 1538 if (adapter->init_done_rc == ABORTED) { 1539 netdev_warn(netdev, "Login aborted, retrying...\n"); 1540 retry = true; 1541 adapter->init_done_rc = 0; 1542 retry_count++; 1543 /* FW or device may be busy, so 1544 * wait a bit before retrying login 1545 */ 1546 msleep(500); 1547 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1548 retry_count++; 1549 release_sub_crqs(adapter, 1); 1550 1551 retry = true; 1552 netdev_dbg(netdev, 1553 "Received partial success, retrying...\n"); 1554 adapter->init_done_rc = 0; 1555 reinit_completion(&adapter->init_done); 1556 send_query_cap(adapter); 1557 if (!wait_for_completion_timeout(&adapter->init_done, 1558 timeout)) { 1559 netdev_warn(netdev, 1560 "Capabilities query timed out\n"); 1561 return -ETIMEDOUT; 1562 } 1563 1564 rc = init_sub_crqs(adapter); 1565 if (rc) { 1566 netdev_warn(netdev, 1567 "SCRQ initialization failed\n"); 1568 return rc; 1569 } 1570 1571 rc = init_sub_crq_irqs(adapter); 1572 if (rc) { 1573 netdev_warn(netdev, 1574 "SCRQ irq initialization failed\n"); 1575 return rc; 1576 } 1577 /* Default/timeout error handling, reset and start fresh */ 1578 } else if (adapter->init_done_rc) { 1579 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1580 adapter->init_done_rc); 1581 1582 partial_reset: 1583 /* adapter login failed, so free any CRQs or sub-CRQs 1584 * and register again before attempting to login again. 1585 * If we don't do this then the VIOS may think that 1586 * we are already logged in and reject any subsequent 1587 * attempts 1588 */ 1589 netdev_warn(netdev, 1590 "Freeing and re-registering CRQs before attempting to login again\n"); 1591 retry = true; 1592 adapter->init_done_rc = 0; 1593 release_sub_crqs(adapter, true); 1594 /* Much of this is similar logic as ibmvnic_probe(), 1595 * we are essentially re-initializing communication 1596 * with the server. We really should not run any 1597 * resets/failovers here because this is already a form 1598 * of reset and we do not want parallel resets occurring 1599 */ 1600 do { 1601 reinit_init_done(adapter); 1602 /* Clear any failovers we got in the previous 1603 * pass since we are re-initializing the CRQ 1604 */ 1605 adapter->failover_pending = false; 1606 release_crq_queue(adapter); 1607 /* If we don't sleep here then we risk an 1608 * unnecessary failover event from the VIOS. 1609 * This is a known VIOS issue caused by a vnic 1610 * device freeing and registering a CRQ too 1611 * quickly. 1612 */ 1613 msleep(1500); 1614 /* Avoid any resets, since we are currently 1615 * resetting. 1616 */ 1617 spin_lock_irqsave(&adapter->rwi_lock, flags); 1618 flush_reset_queue(adapter); 1619 spin_unlock_irqrestore(&adapter->rwi_lock, 1620 flags); 1621 1622 rc = init_crq_queue(adapter); 1623 if (rc) { 1624 netdev_err(netdev, "login recovery: init CRQ failed %d\n", 1625 rc); 1626 return -EIO; 1627 } 1628 1629 rc = ibmvnic_reset_init(adapter, false); 1630 if (rc) 1631 netdev_err(netdev, "login recovery: Reset init failed %d\n", 1632 rc); 1633 /* IBMVNIC_CRQ_INIT will return EAGAIN if it 1634 * fails, since ibmvnic_reset_init will free 1635 * irq's in failure, we won't be able to receive 1636 * new CRQs so we need to keep trying. probe() 1637 * handles this similarly. 1638 */ 1639 } while (rc == -EAGAIN && retry_count++ < retries); 1640 } 1641 } while (retry); 1642 1643 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1644 1645 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1646 return 0; 1647 } 1648 1649 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1650 { 1651 if (!adapter->login_buf) 1652 return; 1653 1654 dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token, 1655 adapter->login_buf_sz, DMA_TO_DEVICE); 1656 kfree(adapter->login_buf); 1657 adapter->login_buf = NULL; 1658 } 1659 1660 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1661 { 1662 if (!adapter->login_rsp_buf) 1663 return; 1664 1665 dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token, 1666 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 1667 kfree(adapter->login_rsp_buf); 1668 adapter->login_rsp_buf = NULL; 1669 } 1670 1671 static void release_resources(struct ibmvnic_adapter *adapter) 1672 { 1673 release_vpd_data(adapter); 1674 1675 release_napi(adapter); 1676 release_login_buffer(adapter); 1677 release_login_rsp_buffer(adapter); 1678 } 1679 1680 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1681 { 1682 struct net_device *netdev = adapter->netdev; 1683 unsigned long timeout = msecs_to_jiffies(20000); 1684 union ibmvnic_crq crq; 1685 bool resend; 1686 int rc; 1687 1688 netdev_dbg(netdev, "setting link state %d\n", link_state); 1689 1690 memset(&crq, 0, sizeof(crq)); 1691 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1692 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1693 crq.logical_link_state.link_state = link_state; 1694 1695 do { 1696 resend = false; 1697 1698 reinit_completion(&adapter->init_done); 1699 rc = ibmvnic_send_crq(adapter, &crq); 1700 if (rc) { 1701 netdev_err(netdev, "Failed to set link state\n"); 1702 return rc; 1703 } 1704 1705 if (!wait_for_completion_timeout(&adapter->init_done, 1706 timeout)) { 1707 netdev_err(netdev, "timeout setting link state\n"); 1708 return -ETIMEDOUT; 1709 } 1710 1711 if (adapter->init_done_rc == PARTIALSUCCESS) { 1712 /* Partuial success, delay and re-send */ 1713 mdelay(1000); 1714 resend = true; 1715 } else if (adapter->init_done_rc) { 1716 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1717 adapter->init_done_rc); 1718 return adapter->init_done_rc; 1719 } 1720 } while (resend); 1721 1722 return 0; 1723 } 1724 1725 static int set_real_num_queues(struct net_device *netdev) 1726 { 1727 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1728 int rc; 1729 1730 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1731 adapter->req_tx_queues, adapter->req_rx_queues); 1732 1733 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1734 if (rc) { 1735 netdev_err(netdev, "failed to set the number of tx queues\n"); 1736 return rc; 1737 } 1738 1739 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1740 if (rc) 1741 netdev_err(netdev, "failed to set the number of rx queues\n"); 1742 1743 return rc; 1744 } 1745 1746 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1747 { 1748 struct device *dev = &adapter->vdev->dev; 1749 union ibmvnic_crq crq; 1750 int len = 0; 1751 int rc; 1752 1753 if (adapter->vpd->buff) 1754 len = adapter->vpd->len; 1755 1756 mutex_lock(&adapter->fw_lock); 1757 adapter->fw_done_rc = 0; 1758 reinit_completion(&adapter->fw_done); 1759 1760 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1761 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1762 rc = ibmvnic_send_crq(adapter, &crq); 1763 if (rc) { 1764 mutex_unlock(&adapter->fw_lock); 1765 return rc; 1766 } 1767 1768 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1769 if (rc) { 1770 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1771 mutex_unlock(&adapter->fw_lock); 1772 return rc; 1773 } 1774 mutex_unlock(&adapter->fw_lock); 1775 1776 if (!adapter->vpd->len) 1777 return -ENODATA; 1778 1779 if (!adapter->vpd->buff) 1780 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1781 else if (adapter->vpd->len != len) 1782 adapter->vpd->buff = 1783 krealloc(adapter->vpd->buff, 1784 adapter->vpd->len, GFP_KERNEL); 1785 1786 if (!adapter->vpd->buff) { 1787 dev_err(dev, "Could allocate VPD buffer\n"); 1788 return -ENOMEM; 1789 } 1790 1791 adapter->vpd->dma_addr = 1792 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1793 DMA_FROM_DEVICE); 1794 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1795 dev_err(dev, "Could not map VPD buffer\n"); 1796 kfree(adapter->vpd->buff); 1797 adapter->vpd->buff = NULL; 1798 return -ENOMEM; 1799 } 1800 1801 mutex_lock(&adapter->fw_lock); 1802 adapter->fw_done_rc = 0; 1803 reinit_completion(&adapter->fw_done); 1804 1805 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1806 crq.get_vpd.cmd = GET_VPD; 1807 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1808 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1809 rc = ibmvnic_send_crq(adapter, &crq); 1810 if (rc) { 1811 kfree(adapter->vpd->buff); 1812 adapter->vpd->buff = NULL; 1813 mutex_unlock(&adapter->fw_lock); 1814 return rc; 1815 } 1816 1817 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1818 if (rc) { 1819 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1820 kfree(adapter->vpd->buff); 1821 adapter->vpd->buff = NULL; 1822 mutex_unlock(&adapter->fw_lock); 1823 return rc; 1824 } 1825 1826 mutex_unlock(&adapter->fw_lock); 1827 return 0; 1828 } 1829 1830 static int init_resources(struct ibmvnic_adapter *adapter) 1831 { 1832 struct net_device *netdev = adapter->netdev; 1833 int rc; 1834 1835 rc = set_real_num_queues(netdev); 1836 if (rc) 1837 return rc; 1838 1839 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1840 if (!adapter->vpd) 1841 return -ENOMEM; 1842 1843 /* Vital Product Data (VPD) */ 1844 rc = ibmvnic_get_vpd(adapter); 1845 if (rc) { 1846 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1847 return rc; 1848 } 1849 1850 rc = init_napi(adapter); 1851 if (rc) 1852 return rc; 1853 1854 send_query_map(adapter); 1855 1856 rc = init_rx_pools(netdev); 1857 if (rc) 1858 return rc; 1859 1860 rc = init_tx_pools(netdev); 1861 return rc; 1862 } 1863 1864 static int __ibmvnic_open(struct net_device *netdev) 1865 { 1866 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1867 enum vnic_state prev_state = adapter->state; 1868 int i, rc; 1869 1870 adapter->state = VNIC_OPENING; 1871 replenish_pools(adapter); 1872 ibmvnic_napi_enable(adapter); 1873 1874 /* We're ready to receive frames, enable the sub-crq interrupts and 1875 * set the logical link state to up 1876 */ 1877 for (i = 0; i < adapter->req_rx_queues; i++) { 1878 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1879 if (prev_state == VNIC_CLOSED) 1880 enable_irq(adapter->rx_scrq[i]->irq); 1881 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1882 } 1883 1884 for (i = 0; i < adapter->req_tx_queues; i++) { 1885 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1886 if (prev_state == VNIC_CLOSED) 1887 enable_irq(adapter->tx_scrq[i]->irq); 1888 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1889 /* netdev_tx_reset_queue will reset dql stats. During NON_FATAL 1890 * resets, don't reset the stats because there could be batched 1891 * skb's waiting to be sent. If we reset dql stats, we risk 1892 * num_completed being greater than num_queued. This will cause 1893 * a BUG_ON in dql_completed(). 1894 */ 1895 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) 1896 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1897 } 1898 1899 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1900 if (rc) { 1901 ibmvnic_napi_disable(adapter); 1902 ibmvnic_disable_irqs(adapter); 1903 return rc; 1904 } 1905 1906 adapter->tx_queues_active = true; 1907 1908 /* Since queues were stopped until now, there shouldn't be any 1909 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1910 * don't need the synchronize_rcu()? Leaving it for consistency 1911 * with setting ->tx_queues_active = false. 1912 */ 1913 synchronize_rcu(); 1914 1915 netif_tx_start_all_queues(netdev); 1916 1917 if (prev_state == VNIC_CLOSED) { 1918 for (i = 0; i < adapter->req_rx_queues; i++) 1919 napi_schedule(&adapter->napi[i]); 1920 } 1921 1922 adapter->state = VNIC_OPEN; 1923 return rc; 1924 } 1925 1926 static int ibmvnic_open(struct net_device *netdev) 1927 { 1928 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1929 int rc; 1930 1931 ASSERT_RTNL(); 1932 1933 /* If device failover is pending or we are about to reset, just set 1934 * device state and return. Device operation will be handled by reset 1935 * routine. 1936 * 1937 * It should be safe to overwrite the adapter->state here. Since 1938 * we hold the rtnl, either the reset has not actually started or 1939 * the rtnl got dropped during the set_link_state() in do_reset(). 1940 * In the former case, no one else is changing the state (again we 1941 * have the rtnl) and in the latter case, do_reset() will detect and 1942 * honor our setting below. 1943 */ 1944 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1945 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1946 adapter_state_to_string(adapter->state), 1947 adapter->failover_pending); 1948 adapter->state = VNIC_OPEN; 1949 rc = 0; 1950 goto out; 1951 } 1952 1953 if (adapter->state != VNIC_CLOSED) { 1954 rc = ibmvnic_login(netdev); 1955 if (rc) 1956 goto out; 1957 1958 rc = init_resources(adapter); 1959 if (rc) { 1960 netdev_err(netdev, "failed to initialize resources\n"); 1961 goto out; 1962 } 1963 } 1964 1965 rc = __ibmvnic_open(netdev); 1966 1967 out: 1968 /* If open failed and there is a pending failover or in-progress reset, 1969 * set device state and return. Device operation will be handled by 1970 * reset routine. See also comments above regarding rtnl. 1971 */ 1972 if (rc && 1973 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1974 adapter->state = VNIC_OPEN; 1975 rc = 0; 1976 } 1977 1978 if (rc) { 1979 release_resources(adapter); 1980 release_rx_pools(adapter); 1981 release_tx_pools(adapter); 1982 } 1983 1984 return rc; 1985 } 1986 1987 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1988 { 1989 struct ibmvnic_rx_pool *rx_pool; 1990 struct ibmvnic_rx_buff *rx_buff; 1991 u64 rx_entries; 1992 int rx_scrqs; 1993 int i, j; 1994 1995 if (!adapter->rx_pool) 1996 return; 1997 1998 rx_scrqs = adapter->num_active_rx_pools; 1999 rx_entries = adapter->req_rx_add_entries_per_subcrq; 2000 2001 /* Free any remaining skbs in the rx buffer pools */ 2002 for (i = 0; i < rx_scrqs; i++) { 2003 rx_pool = &adapter->rx_pool[i]; 2004 if (!rx_pool || !rx_pool->rx_buff) 2005 continue; 2006 2007 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 2008 for (j = 0; j < rx_entries; j++) { 2009 rx_buff = &rx_pool->rx_buff[j]; 2010 if (rx_buff && rx_buff->skb) { 2011 dev_kfree_skb_any(rx_buff->skb); 2012 rx_buff->skb = NULL; 2013 } 2014 } 2015 } 2016 } 2017 2018 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 2019 struct ibmvnic_tx_pool *tx_pool) 2020 { 2021 struct ibmvnic_tx_buff *tx_buff; 2022 u64 tx_entries; 2023 int i; 2024 2025 if (!tx_pool || !tx_pool->tx_buff) 2026 return; 2027 2028 tx_entries = tx_pool->num_buffers; 2029 2030 for (i = 0; i < tx_entries; i++) { 2031 tx_buff = &tx_pool->tx_buff[i]; 2032 if (tx_buff && tx_buff->skb) { 2033 dev_kfree_skb_any(tx_buff->skb); 2034 tx_buff->skb = NULL; 2035 } 2036 } 2037 } 2038 2039 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 2040 { 2041 int tx_scrqs; 2042 int i; 2043 2044 if (!adapter->tx_pool || !adapter->tso_pool) 2045 return; 2046 2047 tx_scrqs = adapter->num_active_tx_pools; 2048 2049 /* Free any remaining skbs in the tx buffer pools */ 2050 for (i = 0; i < tx_scrqs; i++) { 2051 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 2052 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 2053 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 2054 } 2055 } 2056 2057 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 2058 { 2059 struct net_device *netdev = adapter->netdev; 2060 int i; 2061 2062 if (adapter->tx_scrq) { 2063 for (i = 0; i < adapter->req_tx_queues; i++) 2064 if (adapter->tx_scrq[i]->irq) { 2065 netdev_dbg(netdev, 2066 "Disabling tx_scrq[%d] irq\n", i); 2067 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 2068 disable_irq(adapter->tx_scrq[i]->irq); 2069 } 2070 } 2071 2072 if (adapter->rx_scrq) { 2073 for (i = 0; i < adapter->req_rx_queues; i++) { 2074 if (adapter->rx_scrq[i]->irq) { 2075 netdev_dbg(netdev, 2076 "Disabling rx_scrq[%d] irq\n", i); 2077 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 2078 disable_irq(adapter->rx_scrq[i]->irq); 2079 } 2080 } 2081 } 2082 } 2083 2084 static void ibmvnic_cleanup(struct net_device *netdev) 2085 { 2086 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2087 2088 /* ensure that transmissions are stopped if called by do_reset */ 2089 2090 adapter->tx_queues_active = false; 2091 2092 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 2093 * update so they don't restart a queue after we stop it below. 2094 */ 2095 synchronize_rcu(); 2096 2097 if (test_bit(0, &adapter->resetting)) 2098 netif_tx_disable(netdev); 2099 else 2100 netif_tx_stop_all_queues(netdev); 2101 2102 ibmvnic_napi_disable(adapter); 2103 ibmvnic_disable_irqs(adapter); 2104 } 2105 2106 static int __ibmvnic_close(struct net_device *netdev) 2107 { 2108 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2109 int rc = 0; 2110 2111 adapter->state = VNIC_CLOSING; 2112 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2113 adapter->state = VNIC_CLOSED; 2114 return rc; 2115 } 2116 2117 static int ibmvnic_close(struct net_device *netdev) 2118 { 2119 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2120 int rc; 2121 2122 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 2123 adapter_state_to_string(adapter->state), 2124 adapter->failover_pending, 2125 adapter->force_reset_recovery); 2126 2127 /* If device failover is pending, just set device state and return. 2128 * Device operation will be handled by reset routine. 2129 */ 2130 if (adapter->failover_pending) { 2131 adapter->state = VNIC_CLOSED; 2132 return 0; 2133 } 2134 2135 rc = __ibmvnic_close(netdev); 2136 ibmvnic_cleanup(netdev); 2137 clean_rx_pools(adapter); 2138 clean_tx_pools(adapter); 2139 2140 return rc; 2141 } 2142 2143 /** 2144 * get_hdr_lens - fills list of L2/L3/L4 hdr lens 2145 * @hdr_field: bitfield determining needed headers 2146 * @skb: socket buffer 2147 * @hdr_len: array of header lengths to be filled 2148 * 2149 * Reads hdr_field to determine which headers are needed by firmware. 2150 * Builds a buffer containing these headers. Saves individual header 2151 * lengths and total buffer length to be used to build descriptors. 2152 * 2153 * Return: total len of all headers 2154 */ 2155 static int get_hdr_lens(u8 hdr_field, struct sk_buff *skb, 2156 int *hdr_len) 2157 { 2158 int len = 0; 2159 2160 2161 if ((hdr_field >> 6) & 1) { 2162 hdr_len[0] = skb_mac_header_len(skb); 2163 len += hdr_len[0]; 2164 } 2165 2166 if ((hdr_field >> 5) & 1) { 2167 hdr_len[1] = skb_network_header_len(skb); 2168 len += hdr_len[1]; 2169 } 2170 2171 if (!((hdr_field >> 4) & 1)) 2172 return len; 2173 2174 if (skb->protocol == htons(ETH_P_IP)) { 2175 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2176 hdr_len[2] = tcp_hdrlen(skb); 2177 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 2178 hdr_len[2] = sizeof(struct udphdr); 2179 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2180 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2181 hdr_len[2] = tcp_hdrlen(skb); 2182 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 2183 hdr_len[2] = sizeof(struct udphdr); 2184 } 2185 2186 return len + hdr_len[2]; 2187 } 2188 2189 /** 2190 * create_hdr_descs - create header and header extension descriptors 2191 * @hdr_field: bitfield determining needed headers 2192 * @hdr_data: buffer containing header data 2193 * @len: length of data buffer 2194 * @hdr_len: array of individual header lengths 2195 * @scrq_arr: descriptor array 2196 * 2197 * Creates header and, if needed, header extension descriptors and 2198 * places them in a descriptor array, scrq_arr 2199 * 2200 * Return: Number of header descs 2201 */ 2202 2203 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 2204 union sub_crq *scrq_arr) 2205 { 2206 union sub_crq *hdr_desc; 2207 int tmp_len = len; 2208 int num_descs = 0; 2209 u8 *data, *cur; 2210 int tmp; 2211 2212 while (tmp_len > 0) { 2213 cur = hdr_data + len - tmp_len; 2214 2215 hdr_desc = &scrq_arr[num_descs]; 2216 if (num_descs) { 2217 data = hdr_desc->hdr_ext.data; 2218 tmp = tmp_len > 29 ? 29 : tmp_len; 2219 hdr_desc->hdr_ext.first = IBMVNIC_CRQ_CMD; 2220 hdr_desc->hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 2221 hdr_desc->hdr_ext.len = tmp; 2222 } else { 2223 data = hdr_desc->hdr.data; 2224 tmp = tmp_len > 24 ? 24 : tmp_len; 2225 hdr_desc->hdr.first = IBMVNIC_CRQ_CMD; 2226 hdr_desc->hdr.type = IBMVNIC_HDR_DESC; 2227 hdr_desc->hdr.len = tmp; 2228 hdr_desc->hdr.l2_len = (u8)hdr_len[0]; 2229 hdr_desc->hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 2230 hdr_desc->hdr.l4_len = (u8)hdr_len[2]; 2231 hdr_desc->hdr.flag = hdr_field << 1; 2232 } 2233 memcpy(data, cur, tmp); 2234 tmp_len -= tmp; 2235 num_descs++; 2236 } 2237 2238 return num_descs; 2239 } 2240 2241 /** 2242 * build_hdr_descs_arr - build a header descriptor array 2243 * @skb: tx socket buffer 2244 * @indir_arr: indirect array 2245 * @num_entries: number of descriptors to be sent 2246 * @hdr_field: bit field determining which headers will be sent 2247 * 2248 * This function will build a TX descriptor array with applicable 2249 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 2250 */ 2251 2252 static void build_hdr_descs_arr(struct sk_buff *skb, 2253 union sub_crq *indir_arr, 2254 int *num_entries, u8 hdr_field) 2255 { 2256 int hdr_len[3] = {0, 0, 0}; 2257 int tot_len; 2258 2259 tot_len = get_hdr_lens(hdr_field, skb, hdr_len); 2260 *num_entries += create_hdr_descs(hdr_field, skb_mac_header(skb), 2261 tot_len, hdr_len, indir_arr + 1); 2262 } 2263 2264 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 2265 struct net_device *netdev) 2266 { 2267 /* For some backing devices, mishandling of small packets 2268 * can result in a loss of connection or TX stall. Device 2269 * architects recommend that no packet should be smaller 2270 * than the minimum MTU value provided to the driver, so 2271 * pad any packets to that length 2272 */ 2273 if (skb->len < netdev->min_mtu) 2274 return skb_put_padto(skb, netdev->min_mtu); 2275 2276 return 0; 2277 } 2278 2279 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 2280 struct ibmvnic_sub_crq_queue *tx_scrq) 2281 { 2282 struct ibmvnic_ind_xmit_queue *ind_bufp; 2283 struct ibmvnic_tx_buff *tx_buff; 2284 struct ibmvnic_tx_pool *tx_pool; 2285 union sub_crq tx_scrq_entry; 2286 int queue_num; 2287 int entries; 2288 int index; 2289 int i; 2290 2291 ind_bufp = &tx_scrq->ind_buf; 2292 entries = (u64)ind_bufp->index; 2293 queue_num = tx_scrq->pool_index; 2294 2295 for (i = entries - 1; i >= 0; --i) { 2296 tx_scrq_entry = ind_bufp->indir_arr[i]; 2297 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 2298 continue; 2299 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 2300 if (index & IBMVNIC_TSO_POOL_MASK) { 2301 tx_pool = &adapter->tso_pool[queue_num]; 2302 index &= ~IBMVNIC_TSO_POOL_MASK; 2303 } else { 2304 tx_pool = &adapter->tx_pool[queue_num]; 2305 } 2306 tx_pool->free_map[tx_pool->consumer_index] = index; 2307 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2308 tx_pool->num_buffers - 1 : 2309 tx_pool->consumer_index - 1; 2310 tx_buff = &tx_pool->tx_buff[index]; 2311 adapter->netdev->stats.tx_packets--; 2312 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 2313 adapter->tx_stats_buffers[queue_num].batched_packets--; 2314 adapter->tx_stats_buffers[queue_num].bytes -= 2315 tx_buff->skb->len; 2316 dev_kfree_skb_any(tx_buff->skb); 2317 tx_buff->skb = NULL; 2318 adapter->netdev->stats.tx_dropped++; 2319 } 2320 2321 ind_bufp->index = 0; 2322 2323 if (atomic_sub_return(entries, &tx_scrq->used) <= 2324 (adapter->req_tx_entries_per_subcrq / 2) && 2325 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 2326 rcu_read_lock(); 2327 2328 if (adapter->tx_queues_active) { 2329 netif_wake_subqueue(adapter->netdev, queue_num); 2330 netdev_dbg(adapter->netdev, "Started queue %d\n", 2331 queue_num); 2332 } 2333 2334 rcu_read_unlock(); 2335 } 2336 } 2337 2338 static int send_subcrq_direct(struct ibmvnic_adapter *adapter, 2339 u64 remote_handle, u64 *entry) 2340 { 2341 unsigned int ua = adapter->vdev->unit_address; 2342 struct device *dev = &adapter->vdev->dev; 2343 int rc; 2344 2345 /* Make sure the hypervisor sees the complete request */ 2346 dma_wmb(); 2347 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2348 cpu_to_be64(remote_handle), 2349 cpu_to_be64(entry[0]), cpu_to_be64(entry[1]), 2350 cpu_to_be64(entry[2]), cpu_to_be64(entry[3])); 2351 2352 if (rc) 2353 print_subcrq_error(dev, rc, __func__); 2354 2355 return rc; 2356 } 2357 2358 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 2359 struct ibmvnic_sub_crq_queue *tx_scrq, 2360 bool indirect) 2361 { 2362 struct ibmvnic_ind_xmit_queue *ind_bufp; 2363 u64 dma_addr; 2364 u64 entries; 2365 u64 handle; 2366 int rc; 2367 2368 ind_bufp = &tx_scrq->ind_buf; 2369 dma_addr = (u64)ind_bufp->indir_dma; 2370 entries = (u64)ind_bufp->index; 2371 handle = tx_scrq->handle; 2372 2373 if (!entries) 2374 return 0; 2375 2376 if (indirect) 2377 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 2378 else 2379 rc = send_subcrq_direct(adapter, handle, 2380 (u64 *)ind_bufp->indir_arr); 2381 2382 if (rc) 2383 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 2384 else 2385 ind_bufp->index = 0; 2386 return rc; 2387 } 2388 2389 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 2390 { 2391 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2392 int queue_num = skb_get_queue_mapping(skb); 2393 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 2394 struct device *dev = &adapter->vdev->dev; 2395 struct ibmvnic_ind_xmit_queue *ind_bufp; 2396 struct ibmvnic_tx_buff *tx_buff = NULL; 2397 struct ibmvnic_sub_crq_queue *tx_scrq; 2398 struct ibmvnic_long_term_buff *ltb; 2399 struct ibmvnic_tx_pool *tx_pool; 2400 unsigned int tx_send_failed = 0; 2401 netdev_tx_t ret = NETDEV_TX_OK; 2402 unsigned int tx_map_failed = 0; 2403 union sub_crq indir_arr[16]; 2404 unsigned int tx_dropped = 0; 2405 unsigned int tx_dpackets = 0; 2406 unsigned int tx_bpackets = 0; 2407 unsigned int tx_bytes = 0; 2408 dma_addr_t data_dma_addr; 2409 struct netdev_queue *txq; 2410 unsigned long lpar_rc; 2411 unsigned int skblen; 2412 union sub_crq tx_crq; 2413 unsigned int offset; 2414 bool use_scrq_send_direct = false; 2415 int num_entries = 1; 2416 unsigned char *dst; 2417 int bufidx = 0; 2418 u8 proto = 0; 2419 2420 /* If a reset is in progress, drop the packet since 2421 * the scrqs may get torn down. Otherwise use the 2422 * rcu to ensure reset waits for us to complete. 2423 */ 2424 rcu_read_lock(); 2425 if (!adapter->tx_queues_active) { 2426 dev_kfree_skb_any(skb); 2427 2428 tx_send_failed++; 2429 tx_dropped++; 2430 ret = NETDEV_TX_OK; 2431 goto out; 2432 } 2433 2434 tx_scrq = adapter->tx_scrq[queue_num]; 2435 txq = netdev_get_tx_queue(netdev, queue_num); 2436 ind_bufp = &tx_scrq->ind_buf; 2437 2438 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2439 tx_dropped++; 2440 tx_send_failed++; 2441 ret = NETDEV_TX_OK; 2442 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2443 if (lpar_rc != H_SUCCESS) 2444 goto tx_err; 2445 goto out; 2446 } 2447 2448 if (skb_is_gso(skb)) 2449 tx_pool = &adapter->tso_pool[queue_num]; 2450 else 2451 tx_pool = &adapter->tx_pool[queue_num]; 2452 2453 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2454 2455 if (bufidx == IBMVNIC_INVALID_MAP) { 2456 dev_kfree_skb_any(skb); 2457 tx_send_failed++; 2458 tx_dropped++; 2459 ret = NETDEV_TX_OK; 2460 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2461 if (lpar_rc != H_SUCCESS) 2462 goto tx_err; 2463 goto out; 2464 } 2465 2466 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2467 2468 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2469 2470 dst = ltb->buff + offset; 2471 memset(dst, 0, tx_pool->buf_size); 2472 data_dma_addr = ltb->addr + offset; 2473 2474 /* if we are going to send_subcrq_direct this then we need to 2475 * update the checksum before copying the data into ltb. Essentially 2476 * these packets force disable CSO so that we can guarantee that 2477 * FW does not need header info and we can send direct. Also, vnic 2478 * server must be able to xmit standard packets without header data 2479 */ 2480 if (*hdrs == 0 && !skb_is_gso(skb) && 2481 !ind_bufp->index && !netdev_xmit_more()) { 2482 use_scrq_send_direct = true; 2483 if (skb->ip_summed == CHECKSUM_PARTIAL && 2484 skb_checksum_help(skb)) 2485 use_scrq_send_direct = false; 2486 } 2487 2488 if (skb_shinfo(skb)->nr_frags) { 2489 int cur, i; 2490 2491 /* Copy the head */ 2492 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2493 cur = skb_headlen(skb); 2494 2495 /* Copy the frags */ 2496 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2497 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2498 2499 memcpy(dst + cur, skb_frag_address(frag), 2500 skb_frag_size(frag)); 2501 cur += skb_frag_size(frag); 2502 } 2503 } else { 2504 skb_copy_from_linear_data(skb, dst, skb->len); 2505 } 2506 2507 tx_pool->consumer_index = 2508 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2509 2510 tx_buff = &tx_pool->tx_buff[bufidx]; 2511 2512 /* Sanity checks on our free map to make sure it points to an index 2513 * that is not being occupied by another skb. If skb memory is 2514 * not freed then we see congestion control kick in and halt tx. 2515 */ 2516 if (unlikely(tx_buff->skb)) { 2517 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n", 2518 skb_is_gso(skb) ? "tso_pool" : "tx_pool", 2519 queue_num, bufidx); 2520 dev_kfree_skb_any(tx_buff->skb); 2521 } 2522 2523 tx_buff->skb = skb; 2524 tx_buff->index = bufidx; 2525 tx_buff->pool_index = queue_num; 2526 skblen = skb->len; 2527 2528 memset(&tx_crq, 0, sizeof(tx_crq)); 2529 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2530 tx_crq.v1.type = IBMVNIC_TX_DESC; 2531 tx_crq.v1.n_crq_elem = 1; 2532 tx_crq.v1.n_sge = 1; 2533 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2534 2535 if (skb_is_gso(skb)) 2536 tx_crq.v1.correlator = 2537 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2538 else 2539 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2540 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2541 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2542 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2543 2544 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2545 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2546 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2547 } 2548 2549 if (skb->protocol == htons(ETH_P_IP)) { 2550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2551 proto = ip_hdr(skb)->protocol; 2552 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2553 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2554 proto = ipv6_hdr(skb)->nexthdr; 2555 } 2556 2557 if (proto == IPPROTO_TCP) 2558 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2559 else if (proto == IPPROTO_UDP) 2560 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2561 2562 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2563 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2564 hdrs += 2; 2565 } 2566 if (skb_is_gso(skb)) { 2567 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2568 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2569 hdrs += 2; 2570 } else if (use_scrq_send_direct) { 2571 /* See above comment, CSO disabled with direct xmit */ 2572 tx_crq.v1.flags1 &= ~(IBMVNIC_TX_CHKSUM_OFFLOAD); 2573 ind_bufp->index = 1; 2574 tx_buff->num_entries = 1; 2575 netdev_tx_sent_queue(txq, skb->len); 2576 ind_bufp->indir_arr[0] = tx_crq; 2577 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, false); 2578 if (lpar_rc != H_SUCCESS) 2579 goto tx_err; 2580 2581 tx_dpackets++; 2582 goto early_exit; 2583 } 2584 2585 if ((*hdrs >> 7) & 1) 2586 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2587 2588 tx_crq.v1.n_crq_elem = num_entries; 2589 tx_buff->num_entries = num_entries; 2590 /* flush buffer if current entry can not fit */ 2591 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2592 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2593 if (lpar_rc != H_SUCCESS) 2594 goto tx_flush_err; 2595 } 2596 2597 indir_arr[0] = tx_crq; 2598 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2599 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2600 2601 ind_bufp->index += num_entries; 2602 if (__netdev_tx_sent_queue(txq, skb->len, 2603 netdev_xmit_more() && 2604 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2605 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2606 if (lpar_rc != H_SUCCESS) 2607 goto tx_err; 2608 } 2609 2610 tx_bpackets++; 2611 2612 early_exit: 2613 if (atomic_add_return(num_entries, &tx_scrq->used) 2614 >= adapter->req_tx_entries_per_subcrq) { 2615 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2616 netif_stop_subqueue(netdev, queue_num); 2617 } 2618 2619 tx_bytes += skblen; 2620 txq_trans_cond_update(txq); 2621 ret = NETDEV_TX_OK; 2622 goto out; 2623 2624 tx_flush_err: 2625 dev_kfree_skb_any(skb); 2626 tx_buff->skb = NULL; 2627 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2628 tx_pool->num_buffers - 1 : 2629 tx_pool->consumer_index - 1; 2630 tx_dropped++; 2631 tx_err: 2632 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2633 dev_err_ratelimited(dev, "tx: send failed\n"); 2634 2635 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2636 /* Disable TX and report carrier off if queue is closed 2637 * or pending failover. 2638 * Firmware guarantees that a signal will be sent to the 2639 * driver, triggering a reset or some other action. 2640 */ 2641 netif_tx_stop_all_queues(netdev); 2642 netif_carrier_off(netdev); 2643 } 2644 out: 2645 rcu_read_unlock(); 2646 netdev->stats.tx_dropped += tx_dropped; 2647 netdev->stats.tx_bytes += tx_bytes; 2648 netdev->stats.tx_packets += tx_bpackets + tx_dpackets; 2649 adapter->tx_send_failed += tx_send_failed; 2650 adapter->tx_map_failed += tx_map_failed; 2651 adapter->tx_stats_buffers[queue_num].batched_packets += tx_bpackets; 2652 adapter->tx_stats_buffers[queue_num].direct_packets += tx_dpackets; 2653 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2654 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2655 2656 return ret; 2657 } 2658 2659 static void ibmvnic_set_multi(struct net_device *netdev) 2660 { 2661 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2662 struct netdev_hw_addr *ha; 2663 union ibmvnic_crq crq; 2664 2665 memset(&crq, 0, sizeof(crq)); 2666 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2667 crq.request_capability.cmd = REQUEST_CAPABILITY; 2668 2669 if (netdev->flags & IFF_PROMISC) { 2670 if (!adapter->promisc_supported) 2671 return; 2672 } else { 2673 if (netdev->flags & IFF_ALLMULTI) { 2674 /* Accept all multicast */ 2675 memset(&crq, 0, sizeof(crq)); 2676 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2677 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2678 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2679 ibmvnic_send_crq(adapter, &crq); 2680 } else if (netdev_mc_empty(netdev)) { 2681 /* Reject all multicast */ 2682 memset(&crq, 0, sizeof(crq)); 2683 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2684 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2685 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2686 ibmvnic_send_crq(adapter, &crq); 2687 } else { 2688 /* Accept one or more multicast(s) */ 2689 netdev_for_each_mc_addr(ha, netdev) { 2690 memset(&crq, 0, sizeof(crq)); 2691 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2692 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2693 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2694 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2695 ha->addr); 2696 ibmvnic_send_crq(adapter, &crq); 2697 } 2698 } 2699 } 2700 } 2701 2702 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2703 { 2704 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2705 union ibmvnic_crq crq; 2706 int rc; 2707 2708 if (!is_valid_ether_addr(dev_addr)) { 2709 rc = -EADDRNOTAVAIL; 2710 goto err; 2711 } 2712 2713 memset(&crq, 0, sizeof(crq)); 2714 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2715 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2716 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2717 2718 mutex_lock(&adapter->fw_lock); 2719 adapter->fw_done_rc = 0; 2720 reinit_completion(&adapter->fw_done); 2721 2722 rc = ibmvnic_send_crq(adapter, &crq); 2723 if (rc) { 2724 rc = -EIO; 2725 mutex_unlock(&adapter->fw_lock); 2726 goto err; 2727 } 2728 2729 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2730 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2731 if (rc || adapter->fw_done_rc) { 2732 rc = -EIO; 2733 mutex_unlock(&adapter->fw_lock); 2734 goto err; 2735 } 2736 mutex_unlock(&adapter->fw_lock); 2737 return 0; 2738 err: 2739 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2740 return rc; 2741 } 2742 2743 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2744 { 2745 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2746 struct sockaddr *addr = p; 2747 int rc; 2748 2749 rc = 0; 2750 if (!is_valid_ether_addr(addr->sa_data)) 2751 return -EADDRNOTAVAIL; 2752 2753 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2754 if (adapter->state != VNIC_PROBED) 2755 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2756 2757 return rc; 2758 } 2759 2760 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2761 { 2762 switch (reason) { 2763 case VNIC_RESET_FAILOVER: 2764 return "FAILOVER"; 2765 case VNIC_RESET_MOBILITY: 2766 return "MOBILITY"; 2767 case VNIC_RESET_FATAL: 2768 return "FATAL"; 2769 case VNIC_RESET_NON_FATAL: 2770 return "NON_FATAL"; 2771 case VNIC_RESET_TIMEOUT: 2772 return "TIMEOUT"; 2773 case VNIC_RESET_CHANGE_PARAM: 2774 return "CHANGE_PARAM"; 2775 case VNIC_RESET_PASSIVE_INIT: 2776 return "PASSIVE_INIT"; 2777 } 2778 return "UNKNOWN"; 2779 } 2780 2781 /* 2782 * Initialize the init_done completion and return code values. We 2783 * can get a transport event just after registering the CRQ and the 2784 * tasklet will use this to communicate the transport event. To ensure 2785 * we don't miss the notification/error, initialize these _before_ 2786 * regisering the CRQ. 2787 */ 2788 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2789 { 2790 reinit_completion(&adapter->init_done); 2791 adapter->init_done_rc = 0; 2792 } 2793 2794 /* 2795 * do_reset returns zero if we are able to keep processing reset events, or 2796 * non-zero if we hit a fatal error and must halt. 2797 */ 2798 static int do_reset(struct ibmvnic_adapter *adapter, 2799 struct ibmvnic_rwi *rwi, u32 reset_state) 2800 { 2801 struct net_device *netdev = adapter->netdev; 2802 u64 old_num_rx_queues, old_num_tx_queues; 2803 u64 old_num_rx_slots, old_num_tx_slots; 2804 int rc; 2805 2806 netdev_dbg(adapter->netdev, 2807 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2808 adapter_state_to_string(adapter->state), 2809 adapter->failover_pending, 2810 reset_reason_to_string(rwi->reset_reason), 2811 adapter_state_to_string(reset_state)); 2812 2813 adapter->reset_reason = rwi->reset_reason; 2814 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2815 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2816 rtnl_lock(); 2817 2818 /* Now that we have the rtnl lock, clear any pending failover. 2819 * This will ensure ibmvnic_open() has either completed or will 2820 * block until failover is complete. 2821 */ 2822 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2823 adapter->failover_pending = false; 2824 2825 /* read the state and check (again) after getting rtnl */ 2826 reset_state = adapter->state; 2827 2828 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2829 rc = -EBUSY; 2830 goto out; 2831 } 2832 2833 netif_carrier_off(netdev); 2834 2835 old_num_rx_queues = adapter->req_rx_queues; 2836 old_num_tx_queues = adapter->req_tx_queues; 2837 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2838 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2839 2840 ibmvnic_cleanup(netdev); 2841 2842 if (reset_state == VNIC_OPEN && 2843 adapter->reset_reason != VNIC_RESET_MOBILITY && 2844 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2845 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2846 rc = __ibmvnic_close(netdev); 2847 if (rc) 2848 goto out; 2849 } else { 2850 adapter->state = VNIC_CLOSING; 2851 2852 /* Release the RTNL lock before link state change and 2853 * re-acquire after the link state change to allow 2854 * linkwatch_event to grab the RTNL lock and run during 2855 * a reset. 2856 */ 2857 rtnl_unlock(); 2858 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2859 rtnl_lock(); 2860 if (rc) 2861 goto out; 2862 2863 if (adapter->state == VNIC_OPEN) { 2864 /* When we dropped rtnl, ibmvnic_open() got 2865 * it and noticed that we are resetting and 2866 * set the adapter state to OPEN. Update our 2867 * new "target" state, and resume the reset 2868 * from VNIC_CLOSING state. 2869 */ 2870 netdev_dbg(netdev, 2871 "Open changed state from %s, updating.\n", 2872 adapter_state_to_string(reset_state)); 2873 reset_state = VNIC_OPEN; 2874 adapter->state = VNIC_CLOSING; 2875 } 2876 2877 if (adapter->state != VNIC_CLOSING) { 2878 /* If someone else changed the adapter state 2879 * when we dropped the rtnl, fail the reset 2880 */ 2881 rc = -EAGAIN; 2882 goto out; 2883 } 2884 adapter->state = VNIC_CLOSED; 2885 } 2886 } 2887 2888 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2889 release_resources(adapter); 2890 release_sub_crqs(adapter, 1); 2891 release_crq_queue(adapter); 2892 } 2893 2894 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2895 /* remove the closed state so when we call open it appears 2896 * we are coming from the probed state. 2897 */ 2898 adapter->state = VNIC_PROBED; 2899 2900 reinit_init_done(adapter); 2901 2902 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2903 rc = init_crq_queue(adapter); 2904 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2905 rc = ibmvnic_reenable_crq_queue(adapter); 2906 release_sub_crqs(adapter, 1); 2907 } else { 2908 rc = ibmvnic_reset_crq(adapter); 2909 if (rc == H_CLOSED || rc == H_SUCCESS) { 2910 rc = vio_enable_interrupts(adapter->vdev); 2911 if (rc) 2912 netdev_err(adapter->netdev, 2913 "Reset failed to enable interrupts. rc=%d\n", 2914 rc); 2915 } 2916 } 2917 2918 if (rc) { 2919 netdev_err(adapter->netdev, 2920 "Reset couldn't initialize crq. rc=%d\n", rc); 2921 goto out; 2922 } 2923 2924 rc = ibmvnic_reset_init(adapter, true); 2925 if (rc) 2926 goto out; 2927 2928 /* If the adapter was in PROBE or DOWN state prior to the reset, 2929 * exit here. 2930 */ 2931 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2932 rc = 0; 2933 goto out; 2934 } 2935 2936 rc = ibmvnic_login(netdev); 2937 if (rc) 2938 goto out; 2939 2940 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2941 rc = init_resources(adapter); 2942 if (rc) 2943 goto out; 2944 } else if (adapter->req_rx_queues != old_num_rx_queues || 2945 adapter->req_tx_queues != old_num_tx_queues || 2946 adapter->req_rx_add_entries_per_subcrq != 2947 old_num_rx_slots || 2948 adapter->req_tx_entries_per_subcrq != 2949 old_num_tx_slots || 2950 !adapter->rx_pool || 2951 !adapter->tso_pool || 2952 !adapter->tx_pool) { 2953 release_napi(adapter); 2954 release_vpd_data(adapter); 2955 2956 rc = init_resources(adapter); 2957 if (rc) 2958 goto out; 2959 2960 } else { 2961 rc = init_tx_pools(netdev); 2962 if (rc) { 2963 netdev_dbg(netdev, 2964 "init tx pools failed (%d)\n", 2965 rc); 2966 goto out; 2967 } 2968 2969 rc = init_rx_pools(netdev); 2970 if (rc) { 2971 netdev_dbg(netdev, 2972 "init rx pools failed (%d)\n", 2973 rc); 2974 goto out; 2975 } 2976 } 2977 ibmvnic_disable_irqs(adapter); 2978 } 2979 adapter->state = VNIC_CLOSED; 2980 2981 if (reset_state == VNIC_CLOSED) { 2982 rc = 0; 2983 goto out; 2984 } 2985 2986 rc = __ibmvnic_open(netdev); 2987 if (rc) { 2988 rc = IBMVNIC_OPEN_FAILED; 2989 goto out; 2990 } 2991 2992 /* refresh device's multicast list */ 2993 ibmvnic_set_multi(netdev); 2994 2995 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2996 adapter->reset_reason == VNIC_RESET_MOBILITY) 2997 __netdev_notify_peers(netdev); 2998 2999 rc = 0; 3000 3001 out: 3002 /* restore the adapter state if reset failed */ 3003 if (rc) 3004 adapter->state = reset_state; 3005 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 3006 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 3007 rtnl_unlock(); 3008 3009 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 3010 adapter_state_to_string(adapter->state), 3011 adapter->failover_pending, rc); 3012 return rc; 3013 } 3014 3015 static int do_hard_reset(struct ibmvnic_adapter *adapter, 3016 struct ibmvnic_rwi *rwi, u32 reset_state) 3017 { 3018 struct net_device *netdev = adapter->netdev; 3019 int rc; 3020 3021 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 3022 reset_reason_to_string(rwi->reset_reason)); 3023 3024 /* read the state and check (again) after getting rtnl */ 3025 reset_state = adapter->state; 3026 3027 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 3028 rc = -EBUSY; 3029 goto out; 3030 } 3031 3032 netif_carrier_off(netdev); 3033 adapter->reset_reason = rwi->reset_reason; 3034 3035 ibmvnic_cleanup(netdev); 3036 release_resources(adapter); 3037 release_sub_crqs(adapter, 0); 3038 release_crq_queue(adapter); 3039 3040 /* remove the closed state so when we call open it appears 3041 * we are coming from the probed state. 3042 */ 3043 adapter->state = VNIC_PROBED; 3044 3045 reinit_init_done(adapter); 3046 3047 rc = init_crq_queue(adapter); 3048 if (rc) { 3049 netdev_err(adapter->netdev, 3050 "Couldn't initialize crq. rc=%d\n", rc); 3051 goto out; 3052 } 3053 3054 rc = ibmvnic_reset_init(adapter, false); 3055 if (rc) 3056 goto out; 3057 3058 /* If the adapter was in PROBE or DOWN state prior to the reset, 3059 * exit here. 3060 */ 3061 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3062 goto out; 3063 3064 rc = ibmvnic_login(netdev); 3065 if (rc) 3066 goto out; 3067 3068 rc = init_resources(adapter); 3069 if (rc) 3070 goto out; 3071 3072 ibmvnic_disable_irqs(adapter); 3073 adapter->state = VNIC_CLOSED; 3074 3075 if (reset_state == VNIC_CLOSED) 3076 goto out; 3077 3078 rc = __ibmvnic_open(netdev); 3079 if (rc) { 3080 rc = IBMVNIC_OPEN_FAILED; 3081 goto out; 3082 } 3083 3084 __netdev_notify_peers(netdev); 3085 out: 3086 /* restore adapter state if reset failed */ 3087 if (rc) 3088 adapter->state = reset_state; 3089 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3090 adapter_state_to_string(adapter->state), 3091 adapter->failover_pending, rc); 3092 return rc; 3093 } 3094 3095 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3096 { 3097 struct ibmvnic_rwi *rwi; 3098 unsigned long flags; 3099 3100 spin_lock_irqsave(&adapter->rwi_lock, flags); 3101 3102 if (!list_empty(&adapter->rwi_list)) { 3103 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3104 list); 3105 list_del(&rwi->list); 3106 } else { 3107 rwi = NULL; 3108 } 3109 3110 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3111 return rwi; 3112 } 3113 3114 /** 3115 * do_passive_init - complete probing when partner device is detected. 3116 * @adapter: ibmvnic_adapter struct 3117 * 3118 * If the ibmvnic device does not have a partner device to communicate with at boot 3119 * and that partner device comes online at a later time, this function is called 3120 * to complete the initialization process of ibmvnic device. 3121 * Caller is expected to hold rtnl_lock(). 3122 * 3123 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3124 * in the down state. 3125 * Returns 0 upon success and the device is in PROBED state. 3126 */ 3127 3128 static int do_passive_init(struct ibmvnic_adapter *adapter) 3129 { 3130 unsigned long timeout = msecs_to_jiffies(30000); 3131 struct net_device *netdev = adapter->netdev; 3132 struct device *dev = &adapter->vdev->dev; 3133 int rc; 3134 3135 netdev_dbg(netdev, "Partner device found, probing.\n"); 3136 3137 adapter->state = VNIC_PROBING; 3138 reinit_completion(&adapter->init_done); 3139 adapter->init_done_rc = 0; 3140 adapter->crq.active = true; 3141 3142 rc = send_crq_init_complete(adapter); 3143 if (rc) 3144 goto out; 3145 3146 rc = send_version_xchg(adapter); 3147 if (rc) 3148 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3149 3150 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3151 dev_err(dev, "Initialization sequence timed out\n"); 3152 rc = -ETIMEDOUT; 3153 goto out; 3154 } 3155 3156 rc = init_sub_crqs(adapter); 3157 if (rc) { 3158 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3159 goto out; 3160 } 3161 3162 rc = init_sub_crq_irqs(adapter); 3163 if (rc) { 3164 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3165 goto init_failed; 3166 } 3167 3168 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3169 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3170 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3171 3172 adapter->state = VNIC_PROBED; 3173 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3174 3175 return 0; 3176 3177 init_failed: 3178 release_sub_crqs(adapter, 1); 3179 out: 3180 adapter->state = VNIC_DOWN; 3181 return rc; 3182 } 3183 3184 static void __ibmvnic_reset(struct work_struct *work) 3185 { 3186 struct ibmvnic_adapter *adapter; 3187 unsigned int timeout = 5000; 3188 struct ibmvnic_rwi *tmprwi; 3189 bool saved_state = false; 3190 struct ibmvnic_rwi *rwi; 3191 unsigned long flags; 3192 struct device *dev; 3193 bool need_reset; 3194 int num_fails = 0; 3195 u32 reset_state; 3196 int rc = 0; 3197 3198 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3199 dev = &adapter->vdev->dev; 3200 3201 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3202 * or if another reset is in progress, defer work for now. If probe 3203 * eventually fails it will flush and terminate our work. 3204 * 3205 * Three possibilities here: 3206 * 1. Adpater being removed - just return 3207 * 2. Timed out on probe or another reset in progress - delay the work 3208 * 3. Completed probe - perform any resets in queue 3209 */ 3210 if (adapter->state == VNIC_PROBING && 3211 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3212 dev_err(dev, "Reset thread timed out on probe"); 3213 queue_delayed_work(system_long_wq, 3214 &adapter->ibmvnic_delayed_reset, 3215 IBMVNIC_RESET_DELAY); 3216 return; 3217 } 3218 3219 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3220 if (adapter->state == VNIC_REMOVING) 3221 return; 3222 3223 /* ->rwi_list is stable now (no one else is removing entries) */ 3224 3225 /* ibmvnic_probe() may have purged the reset queue after we were 3226 * scheduled to process a reset so there maybe no resets to process. 3227 * Before setting the ->resetting bit though, we have to make sure 3228 * that there is infact a reset to process. Otherwise we may race 3229 * with ibmvnic_open() and end up leaving the vnic down: 3230 * 3231 * __ibmvnic_reset() ibmvnic_open() 3232 * ----------------- -------------- 3233 * 3234 * set ->resetting bit 3235 * find ->resetting bit is set 3236 * set ->state to IBMVNIC_OPEN (i.e 3237 * assume reset will open device) 3238 * return 3239 * find reset queue empty 3240 * return 3241 * 3242 * Neither performed vnic login/open and vnic stays down 3243 * 3244 * If we hold the lock and conditionally set the bit, either we 3245 * or ibmvnic_open() will complete the open. 3246 */ 3247 need_reset = false; 3248 spin_lock(&adapter->rwi_lock); 3249 if (!list_empty(&adapter->rwi_list)) { 3250 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3251 queue_delayed_work(system_long_wq, 3252 &adapter->ibmvnic_delayed_reset, 3253 IBMVNIC_RESET_DELAY); 3254 } else { 3255 need_reset = true; 3256 } 3257 } 3258 spin_unlock(&adapter->rwi_lock); 3259 3260 if (!need_reset) 3261 return; 3262 3263 rwi = get_next_rwi(adapter); 3264 while (rwi) { 3265 spin_lock_irqsave(&adapter->state_lock, flags); 3266 3267 if (adapter->state == VNIC_REMOVING || 3268 adapter->state == VNIC_REMOVED) { 3269 spin_unlock_irqrestore(&adapter->state_lock, flags); 3270 kfree(rwi); 3271 rc = EBUSY; 3272 break; 3273 } 3274 3275 if (!saved_state) { 3276 reset_state = adapter->state; 3277 saved_state = true; 3278 } 3279 spin_unlock_irqrestore(&adapter->state_lock, flags); 3280 3281 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3282 rtnl_lock(); 3283 rc = do_passive_init(adapter); 3284 rtnl_unlock(); 3285 if (!rc) 3286 netif_carrier_on(adapter->netdev); 3287 } else if (adapter->force_reset_recovery) { 3288 /* Since we are doing a hard reset now, clear the 3289 * failover_pending flag so we don't ignore any 3290 * future MOBILITY or other resets. 3291 */ 3292 adapter->failover_pending = false; 3293 3294 /* Transport event occurred during previous reset */ 3295 if (adapter->wait_for_reset) { 3296 /* Previous was CHANGE_PARAM; caller locked */ 3297 adapter->force_reset_recovery = false; 3298 rc = do_hard_reset(adapter, rwi, reset_state); 3299 } else { 3300 rtnl_lock(); 3301 adapter->force_reset_recovery = false; 3302 rc = do_hard_reset(adapter, rwi, reset_state); 3303 rtnl_unlock(); 3304 } 3305 if (rc) 3306 num_fails++; 3307 else 3308 num_fails = 0; 3309 3310 /* If auto-priority-failover is enabled we can get 3311 * back to back failovers during resets, resulting 3312 * in at least two failed resets (from high-priority 3313 * backing device to low-priority one and then back) 3314 * If resets continue to fail beyond that, give the 3315 * adapter some time to settle down before retrying. 3316 */ 3317 if (num_fails >= 3) { 3318 netdev_dbg(adapter->netdev, 3319 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3320 adapter_state_to_string(adapter->state), 3321 num_fails); 3322 set_current_state(TASK_UNINTERRUPTIBLE); 3323 schedule_timeout(60 * HZ); 3324 } 3325 } else { 3326 rc = do_reset(adapter, rwi, reset_state); 3327 } 3328 tmprwi = rwi; 3329 adapter->last_reset_time = jiffies; 3330 3331 if (rc) 3332 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3333 3334 rwi = get_next_rwi(adapter); 3335 3336 /* 3337 * If there are no resets queued and the previous reset failed, 3338 * the adapter would be in an undefined state. So retry the 3339 * previous reset as a hard reset. 3340 * 3341 * Else, free the previous rwi and, if there is another reset 3342 * queued, process the new reset even if previous reset failed 3343 * (the previous reset could have failed because of a fail 3344 * over for instance, so process the fail over). 3345 */ 3346 if (!rwi && rc) 3347 rwi = tmprwi; 3348 else 3349 kfree(tmprwi); 3350 3351 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3352 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3353 adapter->force_reset_recovery = true; 3354 } 3355 3356 if (adapter->wait_for_reset) { 3357 adapter->reset_done_rc = rc; 3358 complete(&adapter->reset_done); 3359 } 3360 3361 clear_bit_unlock(0, &adapter->resetting); 3362 3363 netdev_dbg(adapter->netdev, 3364 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3365 adapter_state_to_string(adapter->state), 3366 adapter->force_reset_recovery, 3367 adapter->wait_for_reset); 3368 } 3369 3370 static void __ibmvnic_delayed_reset(struct work_struct *work) 3371 { 3372 struct ibmvnic_adapter *adapter; 3373 3374 adapter = container_of(work, struct ibmvnic_adapter, 3375 ibmvnic_delayed_reset.work); 3376 __ibmvnic_reset(&adapter->ibmvnic_reset); 3377 } 3378 3379 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3380 { 3381 struct list_head *entry, *tmp_entry; 3382 3383 if (!list_empty(&adapter->rwi_list)) { 3384 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3385 list_del(entry); 3386 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3387 } 3388 } 3389 } 3390 3391 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3392 enum ibmvnic_reset_reason reason) 3393 { 3394 struct net_device *netdev = adapter->netdev; 3395 struct ibmvnic_rwi *rwi, *tmp; 3396 unsigned long flags; 3397 int ret; 3398 3399 spin_lock_irqsave(&adapter->rwi_lock, flags); 3400 3401 /* If failover is pending don't schedule any other reset. 3402 * Instead let the failover complete. If there is already a 3403 * a failover reset scheduled, we will detect and drop the 3404 * duplicate reset when walking the ->rwi_list below. 3405 */ 3406 if (adapter->state == VNIC_REMOVING || 3407 adapter->state == VNIC_REMOVED || 3408 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3409 ret = EBUSY; 3410 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3411 goto err; 3412 } 3413 3414 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3415 if (tmp->reset_reason == reason) { 3416 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3417 reset_reason_to_string(reason)); 3418 ret = EBUSY; 3419 goto err; 3420 } 3421 } 3422 3423 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3424 if (!rwi) { 3425 ret = ENOMEM; 3426 goto err; 3427 } 3428 /* if we just received a transport event, 3429 * flush reset queue and process this reset 3430 */ 3431 if (adapter->force_reset_recovery) 3432 flush_reset_queue(adapter); 3433 3434 rwi->reset_reason = reason; 3435 list_add_tail(&rwi->list, &adapter->rwi_list); 3436 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3437 reset_reason_to_string(reason)); 3438 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3439 3440 ret = 0; 3441 err: 3442 /* ibmvnic_close() below can block, so drop the lock first */ 3443 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3444 3445 if (ret == ENOMEM) 3446 ibmvnic_close(netdev); 3447 3448 return -ret; 3449 } 3450 3451 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3452 { 3453 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3454 3455 if (test_bit(0, &adapter->resetting)) { 3456 netdev_err(adapter->netdev, 3457 "Adapter is resetting, skip timeout reset\n"); 3458 return; 3459 } 3460 /* No queuing up reset until at least 5 seconds (default watchdog val) 3461 * after last reset 3462 */ 3463 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3464 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3465 return; 3466 } 3467 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3468 } 3469 3470 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3471 struct ibmvnic_rx_buff *rx_buff) 3472 { 3473 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3474 3475 rx_buff->skb = NULL; 3476 3477 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3478 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3479 3480 atomic_dec(&pool->available); 3481 } 3482 3483 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3484 { 3485 struct ibmvnic_sub_crq_queue *rx_scrq; 3486 struct ibmvnic_adapter *adapter; 3487 struct net_device *netdev; 3488 int frames_processed; 3489 int scrq_num; 3490 3491 netdev = napi->dev; 3492 adapter = netdev_priv(netdev); 3493 scrq_num = (int)(napi - adapter->napi); 3494 frames_processed = 0; 3495 rx_scrq = adapter->rx_scrq[scrq_num]; 3496 3497 restart_poll: 3498 while (frames_processed < budget) { 3499 struct sk_buff *skb; 3500 struct ibmvnic_rx_buff *rx_buff; 3501 union sub_crq *next; 3502 u32 length; 3503 u16 offset; 3504 u8 flags = 0; 3505 3506 if (unlikely(test_bit(0, &adapter->resetting) && 3507 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3508 enable_scrq_irq(adapter, rx_scrq); 3509 napi_complete_done(napi, frames_processed); 3510 return frames_processed; 3511 } 3512 3513 if (!pending_scrq(adapter, rx_scrq)) 3514 break; 3515 next = ibmvnic_next_scrq(adapter, rx_scrq); 3516 rx_buff = (struct ibmvnic_rx_buff *) 3517 be64_to_cpu(next->rx_comp.correlator); 3518 /* do error checking */ 3519 if (next->rx_comp.rc) { 3520 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3521 be16_to_cpu(next->rx_comp.rc)); 3522 /* free the entry */ 3523 next->rx_comp.first = 0; 3524 dev_kfree_skb_any(rx_buff->skb); 3525 remove_buff_from_pool(adapter, rx_buff); 3526 continue; 3527 } else if (!rx_buff->skb) { 3528 /* free the entry */ 3529 next->rx_comp.first = 0; 3530 remove_buff_from_pool(adapter, rx_buff); 3531 continue; 3532 } 3533 3534 length = be32_to_cpu(next->rx_comp.len); 3535 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3536 flags = next->rx_comp.flags; 3537 skb = rx_buff->skb; 3538 /* load long_term_buff before copying to skb */ 3539 dma_rmb(); 3540 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3541 length); 3542 3543 /* VLAN Header has been stripped by the system firmware and 3544 * needs to be inserted by the driver 3545 */ 3546 if (adapter->rx_vlan_header_insertion && 3547 (flags & IBMVNIC_VLAN_STRIPPED)) 3548 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3549 ntohs(next->rx_comp.vlan_tci)); 3550 3551 /* free the entry */ 3552 next->rx_comp.first = 0; 3553 remove_buff_from_pool(adapter, rx_buff); 3554 3555 skb_put(skb, length); 3556 skb->protocol = eth_type_trans(skb, netdev); 3557 skb_record_rx_queue(skb, scrq_num); 3558 3559 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3560 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3561 skb->ip_summed = CHECKSUM_UNNECESSARY; 3562 } 3563 3564 length = skb->len; 3565 napi_gro_receive(napi, skb); /* send it up */ 3566 netdev->stats.rx_packets++; 3567 netdev->stats.rx_bytes += length; 3568 adapter->rx_stats_buffers[scrq_num].packets++; 3569 adapter->rx_stats_buffers[scrq_num].bytes += length; 3570 frames_processed++; 3571 } 3572 3573 if (adapter->state != VNIC_CLOSING && 3574 (atomic_read(&adapter->rx_pool[scrq_num].available) < 3575 adapter->req_rx_add_entries_per_subcrq / 2)) 3576 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3577 if (frames_processed < budget) { 3578 if (napi_complete_done(napi, frames_processed)) { 3579 enable_scrq_irq(adapter, rx_scrq); 3580 if (pending_scrq(adapter, rx_scrq)) { 3581 if (napi_schedule(napi)) { 3582 disable_scrq_irq(adapter, rx_scrq); 3583 goto restart_poll; 3584 } 3585 } 3586 } 3587 } 3588 return frames_processed; 3589 } 3590 3591 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3592 { 3593 int rc, ret; 3594 3595 adapter->fallback.mtu = adapter->req_mtu; 3596 adapter->fallback.rx_queues = adapter->req_rx_queues; 3597 adapter->fallback.tx_queues = adapter->req_tx_queues; 3598 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3599 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3600 3601 reinit_completion(&adapter->reset_done); 3602 adapter->wait_for_reset = true; 3603 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3604 3605 if (rc) { 3606 ret = rc; 3607 goto out; 3608 } 3609 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3610 if (rc) { 3611 ret = -ENODEV; 3612 goto out; 3613 } 3614 3615 ret = 0; 3616 if (adapter->reset_done_rc) { 3617 ret = -EIO; 3618 adapter->desired.mtu = adapter->fallback.mtu; 3619 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3620 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3621 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3622 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3623 3624 reinit_completion(&adapter->reset_done); 3625 adapter->wait_for_reset = true; 3626 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3627 if (rc) { 3628 ret = rc; 3629 goto out; 3630 } 3631 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3632 60000); 3633 if (rc) { 3634 ret = -ENODEV; 3635 goto out; 3636 } 3637 } 3638 out: 3639 adapter->wait_for_reset = false; 3640 3641 return ret; 3642 } 3643 3644 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3645 { 3646 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3647 3648 adapter->desired.mtu = new_mtu + ETH_HLEN; 3649 3650 return wait_for_reset(adapter); 3651 } 3652 3653 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3654 struct net_device *dev, 3655 netdev_features_t features) 3656 { 3657 /* Some backing hardware adapters can not 3658 * handle packets with a MSS less than 224 3659 * or with only one segment. 3660 */ 3661 if (skb_is_gso(skb)) { 3662 if (skb_shinfo(skb)->gso_size < 224 || 3663 skb_shinfo(skb)->gso_segs == 1) 3664 features &= ~NETIF_F_GSO_MASK; 3665 } 3666 3667 return features; 3668 } 3669 3670 static const struct net_device_ops ibmvnic_netdev_ops = { 3671 .ndo_open = ibmvnic_open, 3672 .ndo_stop = ibmvnic_close, 3673 .ndo_start_xmit = ibmvnic_xmit, 3674 .ndo_set_rx_mode = ibmvnic_set_multi, 3675 .ndo_set_mac_address = ibmvnic_set_mac, 3676 .ndo_validate_addr = eth_validate_addr, 3677 .ndo_tx_timeout = ibmvnic_tx_timeout, 3678 .ndo_change_mtu = ibmvnic_change_mtu, 3679 .ndo_features_check = ibmvnic_features_check, 3680 }; 3681 3682 /* ethtool functions */ 3683 3684 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3685 struct ethtool_link_ksettings *cmd) 3686 { 3687 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3688 int rc; 3689 3690 rc = send_query_phys_parms(adapter); 3691 if (rc) { 3692 adapter->speed = SPEED_UNKNOWN; 3693 adapter->duplex = DUPLEX_UNKNOWN; 3694 } 3695 cmd->base.speed = adapter->speed; 3696 cmd->base.duplex = adapter->duplex; 3697 cmd->base.port = PORT_FIBRE; 3698 cmd->base.phy_address = 0; 3699 cmd->base.autoneg = AUTONEG_ENABLE; 3700 3701 return 0; 3702 } 3703 3704 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3705 struct ethtool_drvinfo *info) 3706 { 3707 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3708 3709 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3710 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3711 strscpy(info->fw_version, adapter->fw_version, 3712 sizeof(info->fw_version)); 3713 } 3714 3715 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3716 { 3717 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3718 3719 return adapter->msg_enable; 3720 } 3721 3722 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3723 { 3724 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3725 3726 adapter->msg_enable = data; 3727 } 3728 3729 static u32 ibmvnic_get_link(struct net_device *netdev) 3730 { 3731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3732 3733 /* Don't need to send a query because we request a logical link up at 3734 * init and then we wait for link state indications 3735 */ 3736 return adapter->logical_link_state; 3737 } 3738 3739 static void ibmvnic_get_ringparam(struct net_device *netdev, 3740 struct ethtool_ringparam *ring, 3741 struct kernel_ethtool_ringparam *kernel_ring, 3742 struct netlink_ext_ack *extack) 3743 { 3744 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3745 3746 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3747 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3748 ring->rx_mini_max_pending = 0; 3749 ring->rx_jumbo_max_pending = 0; 3750 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3751 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3752 ring->rx_mini_pending = 0; 3753 ring->rx_jumbo_pending = 0; 3754 } 3755 3756 static int ibmvnic_set_ringparam(struct net_device *netdev, 3757 struct ethtool_ringparam *ring, 3758 struct kernel_ethtool_ringparam *kernel_ring, 3759 struct netlink_ext_ack *extack) 3760 { 3761 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3762 3763 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3764 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3765 netdev_err(netdev, "Invalid request.\n"); 3766 netdev_err(netdev, "Max tx buffers = %llu\n", 3767 adapter->max_rx_add_entries_per_subcrq); 3768 netdev_err(netdev, "Max rx buffers = %llu\n", 3769 adapter->max_tx_entries_per_subcrq); 3770 return -EINVAL; 3771 } 3772 3773 adapter->desired.rx_entries = ring->rx_pending; 3774 adapter->desired.tx_entries = ring->tx_pending; 3775 3776 return wait_for_reset(adapter); 3777 } 3778 3779 static void ibmvnic_get_channels(struct net_device *netdev, 3780 struct ethtool_channels *channels) 3781 { 3782 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3783 3784 channels->max_rx = adapter->max_rx_queues; 3785 channels->max_tx = adapter->max_tx_queues; 3786 channels->max_other = 0; 3787 channels->max_combined = 0; 3788 channels->rx_count = adapter->req_rx_queues; 3789 channels->tx_count = adapter->req_tx_queues; 3790 channels->other_count = 0; 3791 channels->combined_count = 0; 3792 } 3793 3794 static int ibmvnic_set_channels(struct net_device *netdev, 3795 struct ethtool_channels *channels) 3796 { 3797 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3798 3799 adapter->desired.rx_queues = channels->rx_count; 3800 adapter->desired.tx_queues = channels->tx_count; 3801 3802 return wait_for_reset(adapter); 3803 } 3804 3805 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3806 { 3807 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3808 int i; 3809 3810 if (stringset != ETH_SS_STATS) 3811 return; 3812 3813 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3814 ethtool_puts(&data, ibmvnic_stats[i].name); 3815 3816 for (i = 0; i < adapter->req_tx_queues; i++) { 3817 ethtool_sprintf(&data, "tx%d_batched_packets", i); 3818 ethtool_sprintf(&data, "tx%d_direct_packets", i); 3819 ethtool_sprintf(&data, "tx%d_bytes", i); 3820 ethtool_sprintf(&data, "tx%d_dropped_packets", i); 3821 } 3822 3823 for (i = 0; i < adapter->req_rx_queues; i++) { 3824 ethtool_sprintf(&data, "rx%d_packets", i); 3825 ethtool_sprintf(&data, "rx%d_bytes", i); 3826 ethtool_sprintf(&data, "rx%d_interrupts", i); 3827 } 3828 } 3829 3830 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3831 { 3832 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3833 3834 switch (sset) { 3835 case ETH_SS_STATS: 3836 return ARRAY_SIZE(ibmvnic_stats) + 3837 adapter->req_tx_queues * NUM_TX_STATS + 3838 adapter->req_rx_queues * NUM_RX_STATS; 3839 default: 3840 return -EOPNOTSUPP; 3841 } 3842 } 3843 3844 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3845 struct ethtool_stats *stats, u64 *data) 3846 { 3847 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3848 union ibmvnic_crq crq; 3849 int i, j; 3850 int rc; 3851 3852 memset(&crq, 0, sizeof(crq)); 3853 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3854 crq.request_statistics.cmd = REQUEST_STATISTICS; 3855 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3856 crq.request_statistics.len = 3857 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3858 3859 /* Wait for data to be written */ 3860 reinit_completion(&adapter->stats_done); 3861 rc = ibmvnic_send_crq(adapter, &crq); 3862 if (rc) 3863 return; 3864 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3865 if (rc) 3866 return; 3867 3868 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3869 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3870 (adapter, ibmvnic_stats[i].offset)); 3871 3872 for (j = 0; j < adapter->req_tx_queues; j++) { 3873 data[i] = adapter->tx_stats_buffers[j].batched_packets; 3874 i++; 3875 data[i] = adapter->tx_stats_buffers[j].direct_packets; 3876 i++; 3877 data[i] = adapter->tx_stats_buffers[j].bytes; 3878 i++; 3879 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3880 i++; 3881 } 3882 3883 for (j = 0; j < adapter->req_rx_queues; j++) { 3884 data[i] = adapter->rx_stats_buffers[j].packets; 3885 i++; 3886 data[i] = adapter->rx_stats_buffers[j].bytes; 3887 i++; 3888 data[i] = adapter->rx_stats_buffers[j].interrupts; 3889 i++; 3890 } 3891 } 3892 3893 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3894 .get_drvinfo = ibmvnic_get_drvinfo, 3895 .get_msglevel = ibmvnic_get_msglevel, 3896 .set_msglevel = ibmvnic_set_msglevel, 3897 .get_link = ibmvnic_get_link, 3898 .get_ringparam = ibmvnic_get_ringparam, 3899 .set_ringparam = ibmvnic_set_ringparam, 3900 .get_channels = ibmvnic_get_channels, 3901 .set_channels = ibmvnic_set_channels, 3902 .get_strings = ibmvnic_get_strings, 3903 .get_sset_count = ibmvnic_get_sset_count, 3904 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3905 .get_link_ksettings = ibmvnic_get_link_ksettings, 3906 }; 3907 3908 /* Routines for managing CRQs/sCRQs */ 3909 3910 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3911 struct ibmvnic_sub_crq_queue *scrq) 3912 { 3913 int rc; 3914 3915 if (!scrq) { 3916 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3917 return -EINVAL; 3918 } 3919 3920 if (scrq->irq) { 3921 free_irq(scrq->irq, scrq); 3922 irq_dispose_mapping(scrq->irq); 3923 scrq->irq = 0; 3924 } 3925 3926 if (scrq->msgs) { 3927 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3928 atomic_set(&scrq->used, 0); 3929 scrq->cur = 0; 3930 scrq->ind_buf.index = 0; 3931 } else { 3932 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3933 return -EINVAL; 3934 } 3935 3936 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3937 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3938 return rc; 3939 } 3940 3941 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3942 { 3943 int i, rc; 3944 3945 if (!adapter->tx_scrq || !adapter->rx_scrq) 3946 return -EINVAL; 3947 3948 ibmvnic_clean_affinity(adapter); 3949 3950 for (i = 0; i < adapter->req_tx_queues; i++) { 3951 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3952 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3953 if (rc) 3954 return rc; 3955 } 3956 3957 for (i = 0; i < adapter->req_rx_queues; i++) { 3958 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3959 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3960 if (rc) 3961 return rc; 3962 } 3963 3964 return rc; 3965 } 3966 3967 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3968 struct ibmvnic_sub_crq_queue *scrq, 3969 bool do_h_free) 3970 { 3971 struct device *dev = &adapter->vdev->dev; 3972 long rc; 3973 3974 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3975 3976 if (do_h_free) { 3977 /* Close the sub-crqs */ 3978 do { 3979 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3980 adapter->vdev->unit_address, 3981 scrq->crq_num); 3982 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3983 3984 if (rc) { 3985 netdev_err(adapter->netdev, 3986 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3987 scrq->crq_num, rc); 3988 } 3989 } 3990 3991 dma_free_coherent(dev, 3992 IBMVNIC_IND_ARR_SZ, 3993 scrq->ind_buf.indir_arr, 3994 scrq->ind_buf.indir_dma); 3995 3996 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3997 DMA_BIDIRECTIONAL); 3998 free_pages((unsigned long)scrq->msgs, 2); 3999 free_cpumask_var(scrq->affinity_mask); 4000 kfree(scrq); 4001 } 4002 4003 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 4004 *adapter) 4005 { 4006 struct device *dev = &adapter->vdev->dev; 4007 struct ibmvnic_sub_crq_queue *scrq; 4008 int rc; 4009 4010 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 4011 if (!scrq) 4012 return NULL; 4013 4014 scrq->msgs = 4015 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 4016 if (!scrq->msgs) { 4017 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 4018 goto zero_page_failed; 4019 } 4020 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 4021 goto cpumask_alloc_failed; 4022 4023 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 4024 DMA_BIDIRECTIONAL); 4025 if (dma_mapping_error(dev, scrq->msg_token)) { 4026 dev_warn(dev, "Couldn't map crq queue messages page\n"); 4027 goto map_failed; 4028 } 4029 4030 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4031 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 4032 4033 if (rc == H_RESOURCE) 4034 rc = ibmvnic_reset_crq(adapter); 4035 4036 if (rc == H_CLOSED) { 4037 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 4038 } else if (rc) { 4039 dev_warn(dev, "Error %d registering sub-crq\n", rc); 4040 goto reg_failed; 4041 } 4042 4043 scrq->adapter = adapter; 4044 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 4045 scrq->ind_buf.index = 0; 4046 4047 scrq->ind_buf.indir_arr = 4048 dma_alloc_coherent(dev, 4049 IBMVNIC_IND_ARR_SZ, 4050 &scrq->ind_buf.indir_dma, 4051 GFP_KERNEL); 4052 4053 if (!scrq->ind_buf.indir_arr) 4054 goto indir_failed; 4055 4056 spin_lock_init(&scrq->lock); 4057 4058 netdev_dbg(adapter->netdev, 4059 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4060 scrq->crq_num, scrq->hw_irq, scrq->irq); 4061 4062 return scrq; 4063 4064 indir_failed: 4065 do { 4066 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4067 adapter->vdev->unit_address, 4068 scrq->crq_num); 4069 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4070 reg_failed: 4071 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4072 DMA_BIDIRECTIONAL); 4073 map_failed: 4074 free_cpumask_var(scrq->affinity_mask); 4075 cpumask_alloc_failed: 4076 free_pages((unsigned long)scrq->msgs, 2); 4077 zero_page_failed: 4078 kfree(scrq); 4079 4080 return NULL; 4081 } 4082 4083 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4084 { 4085 int i; 4086 4087 ibmvnic_clean_affinity(adapter); 4088 if (adapter->tx_scrq) { 4089 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4090 if (!adapter->tx_scrq[i]) 4091 continue; 4092 4093 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4094 i); 4095 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4096 if (adapter->tx_scrq[i]->irq) { 4097 free_irq(adapter->tx_scrq[i]->irq, 4098 adapter->tx_scrq[i]); 4099 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4100 adapter->tx_scrq[i]->irq = 0; 4101 } 4102 4103 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4104 do_h_free); 4105 } 4106 4107 kfree(adapter->tx_scrq); 4108 adapter->tx_scrq = NULL; 4109 adapter->num_active_tx_scrqs = 0; 4110 } 4111 4112 /* Clean any remaining outstanding SKBs 4113 * we freed the irq so we won't be hearing 4114 * from them 4115 */ 4116 clean_tx_pools(adapter); 4117 4118 if (adapter->rx_scrq) { 4119 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4120 if (!adapter->rx_scrq[i]) 4121 continue; 4122 4123 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4124 i); 4125 if (adapter->rx_scrq[i]->irq) { 4126 free_irq(adapter->rx_scrq[i]->irq, 4127 adapter->rx_scrq[i]); 4128 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4129 adapter->rx_scrq[i]->irq = 0; 4130 } 4131 4132 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4133 do_h_free); 4134 } 4135 4136 kfree(adapter->rx_scrq); 4137 adapter->rx_scrq = NULL; 4138 adapter->num_active_rx_scrqs = 0; 4139 } 4140 } 4141 4142 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4143 struct ibmvnic_sub_crq_queue *scrq) 4144 { 4145 struct device *dev = &adapter->vdev->dev; 4146 unsigned long rc; 4147 4148 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4149 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4150 if (rc) 4151 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4152 scrq->hw_irq, rc); 4153 return rc; 4154 } 4155 4156 /* We can not use the IRQ chip EOI handler because that has the 4157 * unintended effect of changing the interrupt priority. 4158 */ 4159 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4160 { 4161 u64 val = 0xff000000 | scrq->hw_irq; 4162 unsigned long rc; 4163 4164 rc = plpar_hcall_norets(H_EOI, val); 4165 if (rc) 4166 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4167 } 4168 4169 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4170 * transmit or receive queue just prior to a partition migration. 4171 * Force an EOI after migration. 4172 */ 4173 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4174 struct ibmvnic_sub_crq_queue *scrq) 4175 { 4176 if (!xive_enabled()) 4177 ibmvnic_xics_eoi(dev, scrq); 4178 } 4179 4180 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4181 struct ibmvnic_sub_crq_queue *scrq) 4182 { 4183 struct device *dev = &adapter->vdev->dev; 4184 unsigned long rc; 4185 4186 if (scrq->hw_irq > 0x100000000ULL) { 4187 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4188 return 1; 4189 } 4190 4191 if (test_bit(0, &adapter->resetting) && 4192 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4193 ibmvnic_clear_pending_interrupt(dev, scrq); 4194 } 4195 4196 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4197 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4198 if (rc) 4199 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4200 scrq->hw_irq, rc); 4201 return rc; 4202 } 4203 4204 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4205 struct ibmvnic_sub_crq_queue *scrq) 4206 { 4207 struct device *dev = &adapter->vdev->dev; 4208 int num_packets = 0, total_bytes = 0; 4209 struct ibmvnic_tx_pool *tx_pool; 4210 struct ibmvnic_tx_buff *txbuff; 4211 struct netdev_queue *txq; 4212 union sub_crq *next; 4213 int index, i; 4214 4215 restart_loop: 4216 while (pending_scrq(adapter, scrq)) { 4217 unsigned int pool = scrq->pool_index; 4218 int num_entries = 0; 4219 next = ibmvnic_next_scrq(adapter, scrq); 4220 for (i = 0; i < next->tx_comp.num_comps; i++) { 4221 index = be32_to_cpu(next->tx_comp.correlators[i]); 4222 if (index & IBMVNIC_TSO_POOL_MASK) { 4223 tx_pool = &adapter->tso_pool[pool]; 4224 index &= ~IBMVNIC_TSO_POOL_MASK; 4225 } else { 4226 tx_pool = &adapter->tx_pool[pool]; 4227 } 4228 4229 txbuff = &tx_pool->tx_buff[index]; 4230 num_packets++; 4231 num_entries += txbuff->num_entries; 4232 if (txbuff->skb) { 4233 total_bytes += txbuff->skb->len; 4234 if (next->tx_comp.rcs[i]) { 4235 dev_err(dev, "tx error %x\n", 4236 next->tx_comp.rcs[i]); 4237 dev_kfree_skb_irq(txbuff->skb); 4238 } else { 4239 dev_consume_skb_irq(txbuff->skb); 4240 } 4241 txbuff->skb = NULL; 4242 } else { 4243 netdev_warn(adapter->netdev, 4244 "TX completion received with NULL socket buffer\n"); 4245 } 4246 tx_pool->free_map[tx_pool->producer_index] = index; 4247 tx_pool->producer_index = 4248 (tx_pool->producer_index + 1) % 4249 tx_pool->num_buffers; 4250 } 4251 /* remove tx_comp scrq*/ 4252 next->tx_comp.first = 0; 4253 4254 4255 if (atomic_sub_return(num_entries, &scrq->used) <= 4256 (adapter->req_tx_entries_per_subcrq / 2) && 4257 __netif_subqueue_stopped(adapter->netdev, 4258 scrq->pool_index)) { 4259 rcu_read_lock(); 4260 if (adapter->tx_queues_active) { 4261 netif_wake_subqueue(adapter->netdev, 4262 scrq->pool_index); 4263 netdev_dbg(adapter->netdev, 4264 "Started queue %d\n", 4265 scrq->pool_index); 4266 } 4267 rcu_read_unlock(); 4268 } 4269 } 4270 4271 enable_scrq_irq(adapter, scrq); 4272 4273 if (pending_scrq(adapter, scrq)) { 4274 disable_scrq_irq(adapter, scrq); 4275 goto restart_loop; 4276 } 4277 4278 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4279 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4280 4281 return 0; 4282 } 4283 4284 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4285 { 4286 struct ibmvnic_sub_crq_queue *scrq = instance; 4287 struct ibmvnic_adapter *adapter = scrq->adapter; 4288 4289 disable_scrq_irq(adapter, scrq); 4290 ibmvnic_complete_tx(adapter, scrq); 4291 4292 return IRQ_HANDLED; 4293 } 4294 4295 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4296 { 4297 struct ibmvnic_sub_crq_queue *scrq = instance; 4298 struct ibmvnic_adapter *adapter = scrq->adapter; 4299 4300 /* When booting a kdump kernel we can hit pending interrupts 4301 * prior to completing driver initialization. 4302 */ 4303 if (unlikely(adapter->state != VNIC_OPEN)) 4304 return IRQ_NONE; 4305 4306 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4307 4308 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4309 disable_scrq_irq(adapter, scrq); 4310 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4311 } 4312 4313 return IRQ_HANDLED; 4314 } 4315 4316 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4317 { 4318 struct device *dev = &adapter->vdev->dev; 4319 struct ibmvnic_sub_crq_queue *scrq; 4320 int i = 0, j = 0; 4321 int rc = 0; 4322 4323 for (i = 0; i < adapter->req_tx_queues; i++) { 4324 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4325 i); 4326 scrq = adapter->tx_scrq[i]; 4327 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4328 4329 if (!scrq->irq) { 4330 rc = -EINVAL; 4331 dev_err(dev, "Error mapping irq\n"); 4332 goto req_tx_irq_failed; 4333 } 4334 4335 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4336 adapter->vdev->unit_address, i); 4337 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4338 0, scrq->name, scrq); 4339 4340 if (rc) { 4341 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4342 scrq->irq, rc); 4343 irq_dispose_mapping(scrq->irq); 4344 goto req_tx_irq_failed; 4345 } 4346 } 4347 4348 for (i = 0; i < adapter->req_rx_queues; i++) { 4349 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4350 i); 4351 scrq = adapter->rx_scrq[i]; 4352 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4353 if (!scrq->irq) { 4354 rc = -EINVAL; 4355 dev_err(dev, "Error mapping irq\n"); 4356 goto req_rx_irq_failed; 4357 } 4358 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4359 adapter->vdev->unit_address, i); 4360 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4361 0, scrq->name, scrq); 4362 if (rc) { 4363 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4364 scrq->irq, rc); 4365 irq_dispose_mapping(scrq->irq); 4366 goto req_rx_irq_failed; 4367 } 4368 } 4369 4370 cpus_read_lock(); 4371 ibmvnic_set_affinity(adapter); 4372 cpus_read_unlock(); 4373 4374 return rc; 4375 4376 req_rx_irq_failed: 4377 for (j = 0; j < i; j++) { 4378 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4379 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4380 } 4381 i = adapter->req_tx_queues; 4382 req_tx_irq_failed: 4383 for (j = 0; j < i; j++) { 4384 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4385 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4386 } 4387 release_sub_crqs(adapter, 1); 4388 return rc; 4389 } 4390 4391 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4392 { 4393 struct device *dev = &adapter->vdev->dev; 4394 struct ibmvnic_sub_crq_queue **allqueues; 4395 int registered_queues = 0; 4396 int total_queues; 4397 int more = 0; 4398 int i; 4399 4400 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4401 4402 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4403 if (!allqueues) 4404 return -ENOMEM; 4405 4406 for (i = 0; i < total_queues; i++) { 4407 allqueues[i] = init_sub_crq_queue(adapter); 4408 if (!allqueues[i]) { 4409 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4410 break; 4411 } 4412 registered_queues++; 4413 } 4414 4415 /* Make sure we were able to register the minimum number of queues */ 4416 if (registered_queues < 4417 adapter->min_tx_queues + adapter->min_rx_queues) { 4418 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4419 goto tx_failed; 4420 } 4421 4422 /* Distribute the failed allocated queues*/ 4423 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4424 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4425 switch (i % 3) { 4426 case 0: 4427 if (adapter->req_rx_queues > adapter->min_rx_queues) 4428 adapter->req_rx_queues--; 4429 else 4430 more++; 4431 break; 4432 case 1: 4433 if (adapter->req_tx_queues > adapter->min_tx_queues) 4434 adapter->req_tx_queues--; 4435 else 4436 more++; 4437 break; 4438 } 4439 } 4440 4441 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4442 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4443 if (!adapter->tx_scrq) 4444 goto tx_failed; 4445 4446 for (i = 0; i < adapter->req_tx_queues; i++) { 4447 adapter->tx_scrq[i] = allqueues[i]; 4448 adapter->tx_scrq[i]->pool_index = i; 4449 adapter->num_active_tx_scrqs++; 4450 } 4451 4452 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4453 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4454 if (!adapter->rx_scrq) 4455 goto rx_failed; 4456 4457 for (i = 0; i < adapter->req_rx_queues; i++) { 4458 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4459 adapter->rx_scrq[i]->scrq_num = i; 4460 adapter->num_active_rx_scrqs++; 4461 } 4462 4463 kfree(allqueues); 4464 return 0; 4465 4466 rx_failed: 4467 kfree(adapter->tx_scrq); 4468 adapter->tx_scrq = NULL; 4469 tx_failed: 4470 for (i = 0; i < registered_queues; i++) 4471 release_sub_crq_queue(adapter, allqueues[i], 1); 4472 kfree(allqueues); 4473 return -ENOMEM; 4474 } 4475 4476 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4477 { 4478 struct device *dev = &adapter->vdev->dev; 4479 union ibmvnic_crq crq; 4480 int max_entries; 4481 int cap_reqs; 4482 4483 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4484 * the PROMISC flag). Initialize this count upfront. When the tasklet 4485 * receives a response to all of these, it will send the next protocol 4486 * message (QUERY_IP_OFFLOAD). 4487 */ 4488 if (!(adapter->netdev->flags & IFF_PROMISC) || 4489 adapter->promisc_supported) 4490 cap_reqs = 7; 4491 else 4492 cap_reqs = 6; 4493 4494 if (!retry) { 4495 /* Sub-CRQ entries are 32 byte long */ 4496 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4497 4498 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4499 4500 if (adapter->min_tx_entries_per_subcrq > entries_page || 4501 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4502 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4503 return; 4504 } 4505 4506 if (adapter->desired.mtu) 4507 adapter->req_mtu = adapter->desired.mtu; 4508 else 4509 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4510 4511 if (!adapter->desired.tx_entries) 4512 adapter->desired.tx_entries = 4513 adapter->max_tx_entries_per_subcrq; 4514 if (!adapter->desired.rx_entries) 4515 adapter->desired.rx_entries = 4516 adapter->max_rx_add_entries_per_subcrq; 4517 4518 max_entries = IBMVNIC_LTB_SET_SIZE / 4519 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4520 4521 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4522 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4523 adapter->desired.tx_entries = max_entries; 4524 } 4525 4526 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4527 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4528 adapter->desired.rx_entries = max_entries; 4529 } 4530 4531 if (adapter->desired.tx_entries) 4532 adapter->req_tx_entries_per_subcrq = 4533 adapter->desired.tx_entries; 4534 else 4535 adapter->req_tx_entries_per_subcrq = 4536 adapter->max_tx_entries_per_subcrq; 4537 4538 if (adapter->desired.rx_entries) 4539 adapter->req_rx_add_entries_per_subcrq = 4540 adapter->desired.rx_entries; 4541 else 4542 adapter->req_rx_add_entries_per_subcrq = 4543 adapter->max_rx_add_entries_per_subcrq; 4544 4545 if (adapter->desired.tx_queues) 4546 adapter->req_tx_queues = 4547 adapter->desired.tx_queues; 4548 else 4549 adapter->req_tx_queues = 4550 adapter->opt_tx_comp_sub_queues; 4551 4552 if (adapter->desired.rx_queues) 4553 adapter->req_rx_queues = 4554 adapter->desired.rx_queues; 4555 else 4556 adapter->req_rx_queues = 4557 adapter->opt_rx_comp_queues; 4558 4559 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4560 } else { 4561 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4562 } 4563 memset(&crq, 0, sizeof(crq)); 4564 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4565 crq.request_capability.cmd = REQUEST_CAPABILITY; 4566 4567 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4568 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4569 cap_reqs--; 4570 ibmvnic_send_crq(adapter, &crq); 4571 4572 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4573 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4574 cap_reqs--; 4575 ibmvnic_send_crq(adapter, &crq); 4576 4577 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4578 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4579 cap_reqs--; 4580 ibmvnic_send_crq(adapter, &crq); 4581 4582 crq.request_capability.capability = 4583 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4584 crq.request_capability.number = 4585 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4586 cap_reqs--; 4587 ibmvnic_send_crq(adapter, &crq); 4588 4589 crq.request_capability.capability = 4590 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4591 crq.request_capability.number = 4592 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4593 cap_reqs--; 4594 ibmvnic_send_crq(adapter, &crq); 4595 4596 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4597 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4598 cap_reqs--; 4599 ibmvnic_send_crq(adapter, &crq); 4600 4601 if (adapter->netdev->flags & IFF_PROMISC) { 4602 if (adapter->promisc_supported) { 4603 crq.request_capability.capability = 4604 cpu_to_be16(PROMISC_REQUESTED); 4605 crq.request_capability.number = cpu_to_be64(1); 4606 cap_reqs--; 4607 ibmvnic_send_crq(adapter, &crq); 4608 } 4609 } else { 4610 crq.request_capability.capability = 4611 cpu_to_be16(PROMISC_REQUESTED); 4612 crq.request_capability.number = cpu_to_be64(0); 4613 cap_reqs--; 4614 ibmvnic_send_crq(adapter, &crq); 4615 } 4616 4617 /* Keep at end to catch any discrepancy between expected and actual 4618 * CRQs sent. 4619 */ 4620 WARN_ON(cap_reqs != 0); 4621 } 4622 4623 static int pending_scrq(struct ibmvnic_adapter *adapter, 4624 struct ibmvnic_sub_crq_queue *scrq) 4625 { 4626 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4627 int rc; 4628 4629 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4630 4631 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4632 * contents of the SCRQ descriptor 4633 */ 4634 dma_rmb(); 4635 4636 return rc; 4637 } 4638 4639 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4640 struct ibmvnic_sub_crq_queue *scrq) 4641 { 4642 union sub_crq *entry; 4643 unsigned long flags; 4644 4645 spin_lock_irqsave(&scrq->lock, flags); 4646 entry = &scrq->msgs[scrq->cur]; 4647 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4648 if (++scrq->cur == scrq->size) 4649 scrq->cur = 0; 4650 } else { 4651 entry = NULL; 4652 } 4653 spin_unlock_irqrestore(&scrq->lock, flags); 4654 4655 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4656 * contents of the SCRQ descriptor 4657 */ 4658 dma_rmb(); 4659 4660 return entry; 4661 } 4662 4663 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4664 { 4665 struct ibmvnic_crq_queue *queue = &adapter->crq; 4666 union ibmvnic_crq *crq; 4667 4668 crq = &queue->msgs[queue->cur]; 4669 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4670 if (++queue->cur == queue->size) 4671 queue->cur = 0; 4672 } else { 4673 crq = NULL; 4674 } 4675 4676 return crq; 4677 } 4678 4679 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4680 { 4681 switch (rc) { 4682 case H_PARAMETER: 4683 dev_warn_ratelimited(dev, 4684 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4685 func, rc); 4686 break; 4687 case H_CLOSED: 4688 dev_warn_ratelimited(dev, 4689 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4690 func, rc); 4691 break; 4692 default: 4693 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4694 break; 4695 } 4696 } 4697 4698 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4699 u64 remote_handle, u64 ioba, u64 num_entries) 4700 { 4701 unsigned int ua = adapter->vdev->unit_address; 4702 struct device *dev = &adapter->vdev->dev; 4703 int rc; 4704 4705 /* Make sure the hypervisor sees the complete request */ 4706 dma_wmb(); 4707 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4708 cpu_to_be64(remote_handle), 4709 ioba, num_entries); 4710 4711 if (rc) 4712 print_subcrq_error(dev, rc, __func__); 4713 4714 return rc; 4715 } 4716 4717 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4718 union ibmvnic_crq *crq) 4719 { 4720 unsigned int ua = adapter->vdev->unit_address; 4721 struct device *dev = &adapter->vdev->dev; 4722 u64 *u64_crq = (u64 *)crq; 4723 int rc; 4724 4725 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4726 (unsigned long)cpu_to_be64(u64_crq[0]), 4727 (unsigned long)cpu_to_be64(u64_crq[1])); 4728 4729 if (!adapter->crq.active && 4730 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4731 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4732 return -EINVAL; 4733 } 4734 4735 /* Make sure the hypervisor sees the complete request */ 4736 dma_wmb(); 4737 4738 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4739 cpu_to_be64(u64_crq[0]), 4740 cpu_to_be64(u64_crq[1])); 4741 4742 if (rc) { 4743 if (rc == H_CLOSED) { 4744 dev_warn(dev, "CRQ Queue closed\n"); 4745 /* do not reset, report the fail, wait for passive init from server */ 4746 } 4747 4748 dev_warn(dev, "Send error (rc=%d)\n", rc); 4749 } 4750 4751 return rc; 4752 } 4753 4754 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4755 { 4756 struct device *dev = &adapter->vdev->dev; 4757 union ibmvnic_crq crq; 4758 int retries = 100; 4759 int rc; 4760 4761 memset(&crq, 0, sizeof(crq)); 4762 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4763 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4764 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4765 4766 do { 4767 rc = ibmvnic_send_crq(adapter, &crq); 4768 if (rc != H_CLOSED) 4769 break; 4770 retries--; 4771 msleep(50); 4772 4773 } while (retries > 0); 4774 4775 if (rc) { 4776 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4777 return rc; 4778 } 4779 4780 return 0; 4781 } 4782 4783 struct vnic_login_client_data { 4784 u8 type; 4785 __be16 len; 4786 char name[]; 4787 } __packed; 4788 4789 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4790 { 4791 int len; 4792 4793 /* Calculate the amount of buffer space needed for the 4794 * vnic client data in the login buffer. There are four entries, 4795 * OS name, LPAR name, device name, and a null last entry. 4796 */ 4797 len = 4 * sizeof(struct vnic_login_client_data); 4798 len += 6; /* "Linux" plus NULL */ 4799 len += strlen(utsname()->nodename) + 1; 4800 len += strlen(adapter->netdev->name) + 1; 4801 4802 return len; 4803 } 4804 4805 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4806 struct vnic_login_client_data *vlcd) 4807 { 4808 const char *os_name = "Linux"; 4809 int len; 4810 4811 /* Type 1 - LPAR OS */ 4812 vlcd->type = 1; 4813 len = strlen(os_name) + 1; 4814 vlcd->len = cpu_to_be16(len); 4815 strscpy(vlcd->name, os_name, len); 4816 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4817 4818 /* Type 2 - LPAR name */ 4819 vlcd->type = 2; 4820 len = strlen(utsname()->nodename) + 1; 4821 vlcd->len = cpu_to_be16(len); 4822 strscpy(vlcd->name, utsname()->nodename, len); 4823 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4824 4825 /* Type 3 - device name */ 4826 vlcd->type = 3; 4827 len = strlen(adapter->netdev->name) + 1; 4828 vlcd->len = cpu_to_be16(len); 4829 strscpy(vlcd->name, adapter->netdev->name, len); 4830 } 4831 4832 static int send_login(struct ibmvnic_adapter *adapter) 4833 { 4834 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4835 struct ibmvnic_login_buffer *login_buffer; 4836 struct device *dev = &adapter->vdev->dev; 4837 struct vnic_login_client_data *vlcd; 4838 dma_addr_t rsp_buffer_token; 4839 dma_addr_t buffer_token; 4840 size_t rsp_buffer_size; 4841 union ibmvnic_crq crq; 4842 int client_data_len; 4843 size_t buffer_size; 4844 __be64 *tx_list_p; 4845 __be64 *rx_list_p; 4846 int rc; 4847 int i; 4848 4849 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4850 netdev_err(adapter->netdev, 4851 "RX or TX queues are not allocated, device login failed\n"); 4852 return -ENOMEM; 4853 } 4854 4855 release_login_buffer(adapter); 4856 release_login_rsp_buffer(adapter); 4857 4858 client_data_len = vnic_client_data_len(adapter); 4859 4860 buffer_size = 4861 sizeof(struct ibmvnic_login_buffer) + 4862 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4863 client_data_len; 4864 4865 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4866 if (!login_buffer) 4867 goto buf_alloc_failed; 4868 4869 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4870 DMA_TO_DEVICE); 4871 if (dma_mapping_error(dev, buffer_token)) { 4872 dev_err(dev, "Couldn't map login buffer\n"); 4873 goto buf_map_failed; 4874 } 4875 4876 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4877 sizeof(u64) * adapter->req_tx_queues + 4878 sizeof(u64) * adapter->req_rx_queues + 4879 sizeof(u64) * adapter->req_rx_queues + 4880 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4881 4882 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4883 if (!login_rsp_buffer) 4884 goto buf_rsp_alloc_failed; 4885 4886 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4887 rsp_buffer_size, DMA_FROM_DEVICE); 4888 if (dma_mapping_error(dev, rsp_buffer_token)) { 4889 dev_err(dev, "Couldn't map login rsp buffer\n"); 4890 goto buf_rsp_map_failed; 4891 } 4892 4893 adapter->login_buf = login_buffer; 4894 adapter->login_buf_token = buffer_token; 4895 adapter->login_buf_sz = buffer_size; 4896 adapter->login_rsp_buf = login_rsp_buffer; 4897 adapter->login_rsp_buf_token = rsp_buffer_token; 4898 adapter->login_rsp_buf_sz = rsp_buffer_size; 4899 4900 login_buffer->len = cpu_to_be32(buffer_size); 4901 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4902 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4903 login_buffer->off_txcomp_subcrqs = 4904 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4905 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4906 login_buffer->off_rxcomp_subcrqs = 4907 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4908 sizeof(u64) * adapter->req_tx_queues); 4909 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4910 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4911 4912 tx_list_p = (__be64 *)((char *)login_buffer + 4913 sizeof(struct ibmvnic_login_buffer)); 4914 rx_list_p = (__be64 *)((char *)login_buffer + 4915 sizeof(struct ibmvnic_login_buffer) + 4916 sizeof(u64) * adapter->req_tx_queues); 4917 4918 for (i = 0; i < adapter->req_tx_queues; i++) { 4919 if (adapter->tx_scrq[i]) { 4920 tx_list_p[i] = 4921 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4922 } 4923 } 4924 4925 for (i = 0; i < adapter->req_rx_queues; i++) { 4926 if (adapter->rx_scrq[i]) { 4927 rx_list_p[i] = 4928 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4929 } 4930 } 4931 4932 /* Insert vNIC login client data */ 4933 vlcd = (struct vnic_login_client_data *) 4934 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4935 login_buffer->client_data_offset = 4936 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4937 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4938 4939 vnic_add_client_data(adapter, vlcd); 4940 4941 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4942 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4943 netdev_dbg(adapter->netdev, "%016lx\n", 4944 ((unsigned long *)(adapter->login_buf))[i]); 4945 } 4946 4947 memset(&crq, 0, sizeof(crq)); 4948 crq.login.first = IBMVNIC_CRQ_CMD; 4949 crq.login.cmd = LOGIN; 4950 crq.login.ioba = cpu_to_be32(buffer_token); 4951 crq.login.len = cpu_to_be32(buffer_size); 4952 4953 adapter->login_pending = true; 4954 rc = ibmvnic_send_crq(adapter, &crq); 4955 if (rc) { 4956 adapter->login_pending = false; 4957 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4958 goto buf_send_failed; 4959 } 4960 4961 return 0; 4962 4963 buf_send_failed: 4964 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4965 DMA_FROM_DEVICE); 4966 buf_rsp_map_failed: 4967 kfree(login_rsp_buffer); 4968 adapter->login_rsp_buf = NULL; 4969 buf_rsp_alloc_failed: 4970 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4971 buf_map_failed: 4972 kfree(login_buffer); 4973 adapter->login_buf = NULL; 4974 buf_alloc_failed: 4975 return -ENOMEM; 4976 } 4977 4978 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4979 u32 len, u8 map_id) 4980 { 4981 union ibmvnic_crq crq; 4982 4983 memset(&crq, 0, sizeof(crq)); 4984 crq.request_map.first = IBMVNIC_CRQ_CMD; 4985 crq.request_map.cmd = REQUEST_MAP; 4986 crq.request_map.map_id = map_id; 4987 crq.request_map.ioba = cpu_to_be32(addr); 4988 crq.request_map.len = cpu_to_be32(len); 4989 return ibmvnic_send_crq(adapter, &crq); 4990 } 4991 4992 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4993 { 4994 union ibmvnic_crq crq; 4995 4996 memset(&crq, 0, sizeof(crq)); 4997 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4998 crq.request_unmap.cmd = REQUEST_UNMAP; 4999 crq.request_unmap.map_id = map_id; 5000 return ibmvnic_send_crq(adapter, &crq); 5001 } 5002 5003 static void send_query_map(struct ibmvnic_adapter *adapter) 5004 { 5005 union ibmvnic_crq crq; 5006 5007 memset(&crq, 0, sizeof(crq)); 5008 crq.query_map.first = IBMVNIC_CRQ_CMD; 5009 crq.query_map.cmd = QUERY_MAP; 5010 ibmvnic_send_crq(adapter, &crq); 5011 } 5012 5013 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 5014 static void send_query_cap(struct ibmvnic_adapter *adapter) 5015 { 5016 union ibmvnic_crq crq; 5017 int cap_reqs; 5018 5019 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 5020 * upfront. When the tasklet receives a response to all of these, it 5021 * can send out the next protocol messaage (REQUEST_CAPABILITY). 5022 */ 5023 cap_reqs = 25; 5024 5025 atomic_set(&adapter->running_cap_crqs, cap_reqs); 5026 5027 memset(&crq, 0, sizeof(crq)); 5028 crq.query_capability.first = IBMVNIC_CRQ_CMD; 5029 crq.query_capability.cmd = QUERY_CAPABILITY; 5030 5031 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 5032 ibmvnic_send_crq(adapter, &crq); 5033 cap_reqs--; 5034 5035 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 5036 ibmvnic_send_crq(adapter, &crq); 5037 cap_reqs--; 5038 5039 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 5040 ibmvnic_send_crq(adapter, &crq); 5041 cap_reqs--; 5042 5043 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 5044 ibmvnic_send_crq(adapter, &crq); 5045 cap_reqs--; 5046 5047 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 5048 ibmvnic_send_crq(adapter, &crq); 5049 cap_reqs--; 5050 5051 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 5052 ibmvnic_send_crq(adapter, &crq); 5053 cap_reqs--; 5054 5055 crq.query_capability.capability = 5056 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5057 ibmvnic_send_crq(adapter, &crq); 5058 cap_reqs--; 5059 5060 crq.query_capability.capability = 5061 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5062 ibmvnic_send_crq(adapter, &crq); 5063 cap_reqs--; 5064 5065 crq.query_capability.capability = 5066 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5067 ibmvnic_send_crq(adapter, &crq); 5068 cap_reqs--; 5069 5070 crq.query_capability.capability = 5071 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5072 ibmvnic_send_crq(adapter, &crq); 5073 cap_reqs--; 5074 5075 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5076 ibmvnic_send_crq(adapter, &crq); 5077 cap_reqs--; 5078 5079 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5080 ibmvnic_send_crq(adapter, &crq); 5081 cap_reqs--; 5082 5083 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5084 ibmvnic_send_crq(adapter, &crq); 5085 cap_reqs--; 5086 5087 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5088 ibmvnic_send_crq(adapter, &crq); 5089 cap_reqs--; 5090 5091 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5092 ibmvnic_send_crq(adapter, &crq); 5093 cap_reqs--; 5094 5095 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5096 ibmvnic_send_crq(adapter, &crq); 5097 cap_reqs--; 5098 5099 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5100 ibmvnic_send_crq(adapter, &crq); 5101 cap_reqs--; 5102 5103 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5104 ibmvnic_send_crq(adapter, &crq); 5105 cap_reqs--; 5106 5107 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5108 ibmvnic_send_crq(adapter, &crq); 5109 cap_reqs--; 5110 5111 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5112 ibmvnic_send_crq(adapter, &crq); 5113 cap_reqs--; 5114 5115 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5116 ibmvnic_send_crq(adapter, &crq); 5117 cap_reqs--; 5118 5119 crq.query_capability.capability = 5120 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5121 ibmvnic_send_crq(adapter, &crq); 5122 cap_reqs--; 5123 5124 crq.query_capability.capability = 5125 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5126 ibmvnic_send_crq(adapter, &crq); 5127 cap_reqs--; 5128 5129 crq.query_capability.capability = 5130 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5131 ibmvnic_send_crq(adapter, &crq); 5132 cap_reqs--; 5133 5134 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5135 5136 ibmvnic_send_crq(adapter, &crq); 5137 cap_reqs--; 5138 5139 /* Keep at end to catch any discrepancy between expected and actual 5140 * CRQs sent. 5141 */ 5142 WARN_ON(cap_reqs != 0); 5143 } 5144 5145 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5146 { 5147 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5148 struct device *dev = &adapter->vdev->dev; 5149 union ibmvnic_crq crq; 5150 5151 adapter->ip_offload_tok = 5152 dma_map_single(dev, 5153 &adapter->ip_offload_buf, 5154 buf_sz, 5155 DMA_FROM_DEVICE); 5156 5157 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5158 if (!firmware_has_feature(FW_FEATURE_CMO)) 5159 dev_err(dev, "Couldn't map offload buffer\n"); 5160 return; 5161 } 5162 5163 memset(&crq, 0, sizeof(crq)); 5164 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5165 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5166 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5167 crq.query_ip_offload.ioba = 5168 cpu_to_be32(adapter->ip_offload_tok); 5169 5170 ibmvnic_send_crq(adapter, &crq); 5171 } 5172 5173 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5174 { 5175 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5176 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5177 struct device *dev = &adapter->vdev->dev; 5178 netdev_features_t old_hw_features = 0; 5179 union ibmvnic_crq crq; 5180 5181 adapter->ip_offload_ctrl_tok = 5182 dma_map_single(dev, 5183 ctrl_buf, 5184 sizeof(adapter->ip_offload_ctrl), 5185 DMA_TO_DEVICE); 5186 5187 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5188 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5189 return; 5190 } 5191 5192 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5193 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5194 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5195 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5196 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5197 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5198 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5199 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5200 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5201 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5202 5203 /* large_rx disabled for now, additional features needed */ 5204 ctrl_buf->large_rx_ipv4 = 0; 5205 ctrl_buf->large_rx_ipv6 = 0; 5206 5207 if (adapter->state != VNIC_PROBING) { 5208 old_hw_features = adapter->netdev->hw_features; 5209 adapter->netdev->hw_features = 0; 5210 } 5211 5212 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5213 5214 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5215 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5216 5217 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5218 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5219 5220 if ((adapter->netdev->features & 5221 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5222 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5223 5224 if (buf->large_tx_ipv4) 5225 adapter->netdev->hw_features |= NETIF_F_TSO; 5226 if (buf->large_tx_ipv6) 5227 adapter->netdev->hw_features |= NETIF_F_TSO6; 5228 5229 if (adapter->state == VNIC_PROBING) { 5230 adapter->netdev->features |= adapter->netdev->hw_features; 5231 } else if (old_hw_features != adapter->netdev->hw_features) { 5232 netdev_features_t tmp = 0; 5233 5234 /* disable features no longer supported */ 5235 adapter->netdev->features &= adapter->netdev->hw_features; 5236 /* turn on features now supported if previously enabled */ 5237 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5238 adapter->netdev->hw_features; 5239 adapter->netdev->features |= 5240 tmp & adapter->netdev->wanted_features; 5241 } 5242 5243 memset(&crq, 0, sizeof(crq)); 5244 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5245 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5246 crq.control_ip_offload.len = 5247 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5248 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5249 ibmvnic_send_crq(adapter, &crq); 5250 } 5251 5252 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5253 struct ibmvnic_adapter *adapter) 5254 { 5255 struct device *dev = &adapter->vdev->dev; 5256 5257 if (crq->get_vpd_size_rsp.rc.code) { 5258 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5259 crq->get_vpd_size_rsp.rc.code); 5260 complete(&adapter->fw_done); 5261 return; 5262 } 5263 5264 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5265 complete(&adapter->fw_done); 5266 } 5267 5268 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5269 struct ibmvnic_adapter *adapter) 5270 { 5271 struct device *dev = &adapter->vdev->dev; 5272 unsigned char *substr = NULL; 5273 u8 fw_level_len = 0; 5274 5275 memset(adapter->fw_version, 0, 32); 5276 5277 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5278 DMA_FROM_DEVICE); 5279 5280 if (crq->get_vpd_rsp.rc.code) { 5281 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5282 crq->get_vpd_rsp.rc.code); 5283 goto complete; 5284 } 5285 5286 /* get the position of the firmware version info 5287 * located after the ASCII 'RM' substring in the buffer 5288 */ 5289 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5290 if (!substr) { 5291 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5292 goto complete; 5293 } 5294 5295 /* get length of firmware level ASCII substring */ 5296 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5297 fw_level_len = *(substr + 2); 5298 } else { 5299 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5300 goto complete; 5301 } 5302 5303 /* copy firmware version string from vpd into adapter */ 5304 if ((substr + 3 + fw_level_len) < 5305 (adapter->vpd->buff + adapter->vpd->len)) { 5306 strscpy(adapter->fw_version, substr + 3, 5307 sizeof(adapter->fw_version)); 5308 } else { 5309 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5310 } 5311 5312 complete: 5313 if (adapter->fw_version[0] == '\0') 5314 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5315 complete(&adapter->fw_done); 5316 } 5317 5318 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5319 { 5320 struct device *dev = &adapter->vdev->dev; 5321 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5322 int i; 5323 5324 dma_unmap_single(dev, adapter->ip_offload_tok, 5325 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5326 5327 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5328 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5329 netdev_dbg(adapter->netdev, "%016lx\n", 5330 ((unsigned long *)(buf))[i]); 5331 5332 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5333 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5334 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5335 buf->tcp_ipv4_chksum); 5336 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5337 buf->tcp_ipv6_chksum); 5338 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5339 buf->udp_ipv4_chksum); 5340 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5341 buf->udp_ipv6_chksum); 5342 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5343 buf->large_tx_ipv4); 5344 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5345 buf->large_tx_ipv6); 5346 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5347 buf->large_rx_ipv4); 5348 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5349 buf->large_rx_ipv6); 5350 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5351 buf->max_ipv4_header_size); 5352 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5353 buf->max_ipv6_header_size); 5354 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5355 buf->max_tcp_header_size); 5356 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5357 buf->max_udp_header_size); 5358 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5359 buf->max_large_tx_size); 5360 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5361 buf->max_large_rx_size); 5362 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5363 buf->ipv6_extension_header); 5364 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5365 buf->tcp_pseudosum_req); 5366 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5367 buf->num_ipv6_ext_headers); 5368 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5369 buf->off_ipv6_ext_headers); 5370 5371 send_control_ip_offload(adapter); 5372 } 5373 5374 static const char *ibmvnic_fw_err_cause(u16 cause) 5375 { 5376 switch (cause) { 5377 case ADAPTER_PROBLEM: 5378 return "adapter problem"; 5379 case BUS_PROBLEM: 5380 return "bus problem"; 5381 case FW_PROBLEM: 5382 return "firmware problem"; 5383 case DD_PROBLEM: 5384 return "device driver problem"; 5385 case EEH_RECOVERY: 5386 return "EEH recovery"; 5387 case FW_UPDATED: 5388 return "firmware updated"; 5389 case LOW_MEMORY: 5390 return "low Memory"; 5391 default: 5392 return "unknown"; 5393 } 5394 } 5395 5396 static void handle_error_indication(union ibmvnic_crq *crq, 5397 struct ibmvnic_adapter *adapter) 5398 { 5399 struct device *dev = &adapter->vdev->dev; 5400 u16 cause; 5401 5402 cause = be16_to_cpu(crq->error_indication.error_cause); 5403 5404 dev_warn_ratelimited(dev, 5405 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5406 crq->error_indication.flags 5407 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5408 ibmvnic_fw_err_cause(cause)); 5409 5410 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5411 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5412 else 5413 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5414 } 5415 5416 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5417 struct ibmvnic_adapter *adapter) 5418 { 5419 struct net_device *netdev = adapter->netdev; 5420 struct device *dev = &adapter->vdev->dev; 5421 long rc; 5422 5423 rc = crq->change_mac_addr_rsp.rc.code; 5424 if (rc) { 5425 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5426 goto out; 5427 } 5428 /* crq->change_mac_addr.mac_addr is the requested one 5429 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5430 */ 5431 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5432 ether_addr_copy(adapter->mac_addr, 5433 &crq->change_mac_addr_rsp.mac_addr[0]); 5434 out: 5435 complete(&adapter->fw_done); 5436 return rc; 5437 } 5438 5439 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5440 struct ibmvnic_adapter *adapter) 5441 { 5442 struct device *dev = &adapter->vdev->dev; 5443 u64 *req_value; 5444 char *name; 5445 5446 atomic_dec(&adapter->running_cap_crqs); 5447 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5448 atomic_read(&adapter->running_cap_crqs)); 5449 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5450 case REQ_TX_QUEUES: 5451 req_value = &adapter->req_tx_queues; 5452 name = "tx"; 5453 break; 5454 case REQ_RX_QUEUES: 5455 req_value = &adapter->req_rx_queues; 5456 name = "rx"; 5457 break; 5458 case REQ_RX_ADD_QUEUES: 5459 req_value = &adapter->req_rx_add_queues; 5460 name = "rx_add"; 5461 break; 5462 case REQ_TX_ENTRIES_PER_SUBCRQ: 5463 req_value = &adapter->req_tx_entries_per_subcrq; 5464 name = "tx_entries_per_subcrq"; 5465 break; 5466 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5467 req_value = &adapter->req_rx_add_entries_per_subcrq; 5468 name = "rx_add_entries_per_subcrq"; 5469 break; 5470 case REQ_MTU: 5471 req_value = &adapter->req_mtu; 5472 name = "mtu"; 5473 break; 5474 case PROMISC_REQUESTED: 5475 req_value = &adapter->promisc; 5476 name = "promisc"; 5477 break; 5478 default: 5479 dev_err(dev, "Got invalid cap request rsp %d\n", 5480 crq->request_capability.capability); 5481 return; 5482 } 5483 5484 switch (crq->request_capability_rsp.rc.code) { 5485 case SUCCESS: 5486 break; 5487 case PARTIALSUCCESS: 5488 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5489 *req_value, 5490 (long)be64_to_cpu(crq->request_capability_rsp.number), 5491 name); 5492 5493 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5494 REQ_MTU) { 5495 pr_err("mtu of %llu is not supported. Reverting.\n", 5496 *req_value); 5497 *req_value = adapter->fallback.mtu; 5498 } else { 5499 *req_value = 5500 be64_to_cpu(crq->request_capability_rsp.number); 5501 } 5502 5503 send_request_cap(adapter, 1); 5504 return; 5505 default: 5506 dev_err(dev, "Error %d in request cap rsp\n", 5507 crq->request_capability_rsp.rc.code); 5508 return; 5509 } 5510 5511 /* Done receiving requested capabilities, query IP offload support */ 5512 if (atomic_read(&adapter->running_cap_crqs) == 0) 5513 send_query_ip_offload(adapter); 5514 } 5515 5516 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5517 struct ibmvnic_adapter *adapter) 5518 { 5519 struct device *dev = &adapter->vdev->dev; 5520 struct net_device *netdev = adapter->netdev; 5521 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5522 struct ibmvnic_login_buffer *login = adapter->login_buf; 5523 u64 *tx_handle_array; 5524 u64 *rx_handle_array; 5525 int num_tx_pools; 5526 int num_rx_pools; 5527 u64 *size_array; 5528 u32 rsp_len; 5529 int i; 5530 5531 /* CHECK: Test/set of login_pending does not need to be atomic 5532 * because only ibmvnic_tasklet tests/clears this. 5533 */ 5534 if (!adapter->login_pending) { 5535 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5536 return 0; 5537 } 5538 adapter->login_pending = false; 5539 5540 /* If the number of queues requested can't be allocated by the 5541 * server, the login response will return with code 1. We will need 5542 * to resend the login buffer with fewer queues requested. 5543 */ 5544 if (login_rsp_crq->generic.rc.code) { 5545 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5546 complete(&adapter->init_done); 5547 return 0; 5548 } 5549 5550 if (adapter->failover_pending) { 5551 adapter->init_done_rc = -EAGAIN; 5552 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5553 complete(&adapter->init_done); 5554 /* login response buffer will be released on reset */ 5555 return 0; 5556 } 5557 5558 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5559 5560 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5561 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5562 netdev_dbg(adapter->netdev, "%016lx\n", 5563 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5564 } 5565 5566 /* Sanity checks */ 5567 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5568 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5569 adapter->req_rx_add_queues != 5570 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5571 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5572 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5573 return -EIO; 5574 } 5575 5576 rsp_len = be32_to_cpu(login_rsp->len); 5577 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5578 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5579 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5580 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5581 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5582 /* This can happen if a login request times out and there are 5583 * 2 outstanding login requests sent, the LOGIN_RSP crq 5584 * could have been for the older login request. So we are 5585 * parsing the newer response buffer which may be incomplete 5586 */ 5587 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5588 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5589 return -EIO; 5590 } 5591 5592 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5593 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5594 /* variable buffer sizes are not supported, so just read the 5595 * first entry. 5596 */ 5597 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5598 5599 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5600 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5601 5602 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5603 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5604 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5605 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5606 5607 for (i = 0; i < num_tx_pools; i++) 5608 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5609 5610 for (i = 0; i < num_rx_pools; i++) 5611 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5612 5613 adapter->num_active_tx_scrqs = num_tx_pools; 5614 adapter->num_active_rx_scrqs = num_rx_pools; 5615 release_login_rsp_buffer(adapter); 5616 release_login_buffer(adapter); 5617 complete(&adapter->init_done); 5618 5619 return 0; 5620 } 5621 5622 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5623 struct ibmvnic_adapter *adapter) 5624 { 5625 struct device *dev = &adapter->vdev->dev; 5626 long rc; 5627 5628 rc = crq->request_unmap_rsp.rc.code; 5629 if (rc) 5630 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5631 } 5632 5633 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5634 struct ibmvnic_adapter *adapter) 5635 { 5636 struct net_device *netdev = adapter->netdev; 5637 struct device *dev = &adapter->vdev->dev; 5638 long rc; 5639 5640 rc = crq->query_map_rsp.rc.code; 5641 if (rc) { 5642 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5643 return; 5644 } 5645 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5646 crq->query_map_rsp.page_size, 5647 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5648 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5649 } 5650 5651 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5652 struct ibmvnic_adapter *adapter) 5653 { 5654 struct net_device *netdev = adapter->netdev; 5655 struct device *dev = &adapter->vdev->dev; 5656 long rc; 5657 5658 atomic_dec(&adapter->running_cap_crqs); 5659 netdev_dbg(netdev, "Outstanding queries: %d\n", 5660 atomic_read(&adapter->running_cap_crqs)); 5661 rc = crq->query_capability.rc.code; 5662 if (rc) { 5663 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5664 goto out; 5665 } 5666 5667 switch (be16_to_cpu(crq->query_capability.capability)) { 5668 case MIN_TX_QUEUES: 5669 adapter->min_tx_queues = 5670 be64_to_cpu(crq->query_capability.number); 5671 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5672 adapter->min_tx_queues); 5673 break; 5674 case MIN_RX_QUEUES: 5675 adapter->min_rx_queues = 5676 be64_to_cpu(crq->query_capability.number); 5677 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5678 adapter->min_rx_queues); 5679 break; 5680 case MIN_RX_ADD_QUEUES: 5681 adapter->min_rx_add_queues = 5682 be64_to_cpu(crq->query_capability.number); 5683 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5684 adapter->min_rx_add_queues); 5685 break; 5686 case MAX_TX_QUEUES: 5687 adapter->max_tx_queues = 5688 be64_to_cpu(crq->query_capability.number); 5689 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5690 adapter->max_tx_queues); 5691 break; 5692 case MAX_RX_QUEUES: 5693 adapter->max_rx_queues = 5694 be64_to_cpu(crq->query_capability.number); 5695 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5696 adapter->max_rx_queues); 5697 break; 5698 case MAX_RX_ADD_QUEUES: 5699 adapter->max_rx_add_queues = 5700 be64_to_cpu(crq->query_capability.number); 5701 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5702 adapter->max_rx_add_queues); 5703 break; 5704 case MIN_TX_ENTRIES_PER_SUBCRQ: 5705 adapter->min_tx_entries_per_subcrq = 5706 be64_to_cpu(crq->query_capability.number); 5707 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5708 adapter->min_tx_entries_per_subcrq); 5709 break; 5710 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5711 adapter->min_rx_add_entries_per_subcrq = 5712 be64_to_cpu(crq->query_capability.number); 5713 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5714 adapter->min_rx_add_entries_per_subcrq); 5715 break; 5716 case MAX_TX_ENTRIES_PER_SUBCRQ: 5717 adapter->max_tx_entries_per_subcrq = 5718 be64_to_cpu(crq->query_capability.number); 5719 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5720 adapter->max_tx_entries_per_subcrq); 5721 break; 5722 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5723 adapter->max_rx_add_entries_per_subcrq = 5724 be64_to_cpu(crq->query_capability.number); 5725 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5726 adapter->max_rx_add_entries_per_subcrq); 5727 break; 5728 case TCP_IP_OFFLOAD: 5729 adapter->tcp_ip_offload = 5730 be64_to_cpu(crq->query_capability.number); 5731 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5732 adapter->tcp_ip_offload); 5733 break; 5734 case PROMISC_SUPPORTED: 5735 adapter->promisc_supported = 5736 be64_to_cpu(crq->query_capability.number); 5737 netdev_dbg(netdev, "promisc_supported = %lld\n", 5738 adapter->promisc_supported); 5739 break; 5740 case MIN_MTU: 5741 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5742 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5743 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5744 break; 5745 case MAX_MTU: 5746 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5747 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5748 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5749 break; 5750 case MAX_MULTICAST_FILTERS: 5751 adapter->max_multicast_filters = 5752 be64_to_cpu(crq->query_capability.number); 5753 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5754 adapter->max_multicast_filters); 5755 break; 5756 case VLAN_HEADER_INSERTION: 5757 adapter->vlan_header_insertion = 5758 be64_to_cpu(crq->query_capability.number); 5759 if (adapter->vlan_header_insertion) 5760 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5761 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5762 adapter->vlan_header_insertion); 5763 break; 5764 case RX_VLAN_HEADER_INSERTION: 5765 adapter->rx_vlan_header_insertion = 5766 be64_to_cpu(crq->query_capability.number); 5767 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5768 adapter->rx_vlan_header_insertion); 5769 break; 5770 case MAX_TX_SG_ENTRIES: 5771 adapter->max_tx_sg_entries = 5772 be64_to_cpu(crq->query_capability.number); 5773 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5774 adapter->max_tx_sg_entries); 5775 break; 5776 case RX_SG_SUPPORTED: 5777 adapter->rx_sg_supported = 5778 be64_to_cpu(crq->query_capability.number); 5779 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5780 adapter->rx_sg_supported); 5781 break; 5782 case OPT_TX_COMP_SUB_QUEUES: 5783 adapter->opt_tx_comp_sub_queues = 5784 be64_to_cpu(crq->query_capability.number); 5785 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5786 adapter->opt_tx_comp_sub_queues); 5787 break; 5788 case OPT_RX_COMP_QUEUES: 5789 adapter->opt_rx_comp_queues = 5790 be64_to_cpu(crq->query_capability.number); 5791 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5792 adapter->opt_rx_comp_queues); 5793 break; 5794 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5795 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5796 be64_to_cpu(crq->query_capability.number); 5797 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5798 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5799 break; 5800 case OPT_TX_ENTRIES_PER_SUBCRQ: 5801 adapter->opt_tx_entries_per_subcrq = 5802 be64_to_cpu(crq->query_capability.number); 5803 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5804 adapter->opt_tx_entries_per_subcrq); 5805 break; 5806 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5807 adapter->opt_rxba_entries_per_subcrq = 5808 be64_to_cpu(crq->query_capability.number); 5809 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5810 adapter->opt_rxba_entries_per_subcrq); 5811 break; 5812 case TX_RX_DESC_REQ: 5813 adapter->tx_rx_desc_req = crq->query_capability.number; 5814 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5815 adapter->tx_rx_desc_req); 5816 break; 5817 5818 default: 5819 netdev_err(netdev, "Got invalid cap rsp %d\n", 5820 crq->query_capability.capability); 5821 } 5822 5823 out: 5824 if (atomic_read(&adapter->running_cap_crqs) == 0) 5825 send_request_cap(adapter, 0); 5826 } 5827 5828 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5829 { 5830 union ibmvnic_crq crq; 5831 int rc; 5832 5833 memset(&crq, 0, sizeof(crq)); 5834 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5835 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5836 5837 mutex_lock(&adapter->fw_lock); 5838 adapter->fw_done_rc = 0; 5839 reinit_completion(&adapter->fw_done); 5840 5841 rc = ibmvnic_send_crq(adapter, &crq); 5842 if (rc) { 5843 mutex_unlock(&adapter->fw_lock); 5844 return rc; 5845 } 5846 5847 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5848 if (rc) { 5849 mutex_unlock(&adapter->fw_lock); 5850 return rc; 5851 } 5852 5853 mutex_unlock(&adapter->fw_lock); 5854 return adapter->fw_done_rc ? -EIO : 0; 5855 } 5856 5857 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5858 struct ibmvnic_adapter *adapter) 5859 { 5860 struct net_device *netdev = adapter->netdev; 5861 int rc; 5862 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5863 5864 rc = crq->query_phys_parms_rsp.rc.code; 5865 if (rc) { 5866 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5867 return rc; 5868 } 5869 switch (rspeed) { 5870 case IBMVNIC_10MBPS: 5871 adapter->speed = SPEED_10; 5872 break; 5873 case IBMVNIC_100MBPS: 5874 adapter->speed = SPEED_100; 5875 break; 5876 case IBMVNIC_1GBPS: 5877 adapter->speed = SPEED_1000; 5878 break; 5879 case IBMVNIC_10GBPS: 5880 adapter->speed = SPEED_10000; 5881 break; 5882 case IBMVNIC_25GBPS: 5883 adapter->speed = SPEED_25000; 5884 break; 5885 case IBMVNIC_40GBPS: 5886 adapter->speed = SPEED_40000; 5887 break; 5888 case IBMVNIC_50GBPS: 5889 adapter->speed = SPEED_50000; 5890 break; 5891 case IBMVNIC_100GBPS: 5892 adapter->speed = SPEED_100000; 5893 break; 5894 case IBMVNIC_200GBPS: 5895 adapter->speed = SPEED_200000; 5896 break; 5897 default: 5898 if (netif_carrier_ok(netdev)) 5899 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5900 adapter->speed = SPEED_UNKNOWN; 5901 } 5902 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5903 adapter->duplex = DUPLEX_FULL; 5904 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5905 adapter->duplex = DUPLEX_HALF; 5906 else 5907 adapter->duplex = DUPLEX_UNKNOWN; 5908 5909 return rc; 5910 } 5911 5912 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5913 struct ibmvnic_adapter *adapter) 5914 { 5915 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5916 struct net_device *netdev = adapter->netdev; 5917 struct device *dev = &adapter->vdev->dev; 5918 u64 *u64_crq = (u64 *)crq; 5919 long rc; 5920 5921 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5922 (unsigned long)cpu_to_be64(u64_crq[0]), 5923 (unsigned long)cpu_to_be64(u64_crq[1])); 5924 switch (gen_crq->first) { 5925 case IBMVNIC_CRQ_INIT_RSP: 5926 switch (gen_crq->cmd) { 5927 case IBMVNIC_CRQ_INIT: 5928 dev_info(dev, "Partner initialized\n"); 5929 adapter->from_passive_init = true; 5930 /* Discard any stale login responses from prev reset. 5931 * CHECK: should we clear even on INIT_COMPLETE? 5932 */ 5933 adapter->login_pending = false; 5934 5935 if (adapter->state == VNIC_DOWN) 5936 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5937 else 5938 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5939 5940 if (rc && rc != -EBUSY) { 5941 /* We were unable to schedule the failover 5942 * reset either because the adapter was still 5943 * probing (eg: during kexec) or we could not 5944 * allocate memory. Clear the failover_pending 5945 * flag since no one else will. We ignore 5946 * EBUSY because it means either FAILOVER reset 5947 * is already scheduled or the adapter is 5948 * being removed. 5949 */ 5950 netdev_err(netdev, 5951 "Error %ld scheduling failover reset\n", 5952 rc); 5953 adapter->failover_pending = false; 5954 } 5955 5956 if (!completion_done(&adapter->init_done)) { 5957 if (!adapter->init_done_rc) 5958 adapter->init_done_rc = -EAGAIN; 5959 complete(&adapter->init_done); 5960 } 5961 5962 break; 5963 case IBMVNIC_CRQ_INIT_COMPLETE: 5964 dev_info(dev, "Partner initialization complete\n"); 5965 adapter->crq.active = true; 5966 send_version_xchg(adapter); 5967 break; 5968 default: 5969 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5970 } 5971 return; 5972 case IBMVNIC_CRQ_XPORT_EVENT: 5973 netif_carrier_off(netdev); 5974 adapter->crq.active = false; 5975 /* terminate any thread waiting for a response 5976 * from the device 5977 */ 5978 if (!completion_done(&adapter->fw_done)) { 5979 adapter->fw_done_rc = -EIO; 5980 complete(&adapter->fw_done); 5981 } 5982 5983 /* if we got here during crq-init, retry crq-init */ 5984 if (!completion_done(&adapter->init_done)) { 5985 adapter->init_done_rc = -EAGAIN; 5986 complete(&adapter->init_done); 5987 } 5988 5989 if (!completion_done(&adapter->stats_done)) 5990 complete(&adapter->stats_done); 5991 if (test_bit(0, &adapter->resetting)) 5992 adapter->force_reset_recovery = true; 5993 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5994 dev_info(dev, "Migrated, re-enabling adapter\n"); 5995 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5996 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5997 dev_info(dev, "Backing device failover detected\n"); 5998 adapter->failover_pending = true; 5999 } else { 6000 /* The adapter lost the connection */ 6001 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 6002 gen_crq->cmd); 6003 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 6004 } 6005 return; 6006 case IBMVNIC_CRQ_CMD_RSP: 6007 break; 6008 default: 6009 dev_err(dev, "Got an invalid msg type 0x%02x\n", 6010 gen_crq->first); 6011 return; 6012 } 6013 6014 switch (gen_crq->cmd) { 6015 case VERSION_EXCHANGE_RSP: 6016 rc = crq->version_exchange_rsp.rc.code; 6017 if (rc) { 6018 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 6019 break; 6020 } 6021 ibmvnic_version = 6022 be16_to_cpu(crq->version_exchange_rsp.version); 6023 dev_info(dev, "Partner protocol version is %d\n", 6024 ibmvnic_version); 6025 send_query_cap(adapter); 6026 break; 6027 case QUERY_CAPABILITY_RSP: 6028 handle_query_cap_rsp(crq, adapter); 6029 break; 6030 case QUERY_MAP_RSP: 6031 handle_query_map_rsp(crq, adapter); 6032 break; 6033 case REQUEST_MAP_RSP: 6034 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 6035 complete(&adapter->fw_done); 6036 break; 6037 case REQUEST_UNMAP_RSP: 6038 handle_request_unmap_rsp(crq, adapter); 6039 break; 6040 case REQUEST_CAPABILITY_RSP: 6041 handle_request_cap_rsp(crq, adapter); 6042 break; 6043 case LOGIN_RSP: 6044 netdev_dbg(netdev, "Got Login Response\n"); 6045 handle_login_rsp(crq, adapter); 6046 break; 6047 case LOGICAL_LINK_STATE_RSP: 6048 netdev_dbg(netdev, 6049 "Got Logical Link State Response, state: %d rc: %d\n", 6050 crq->logical_link_state_rsp.link_state, 6051 crq->logical_link_state_rsp.rc.code); 6052 adapter->logical_link_state = 6053 crq->logical_link_state_rsp.link_state; 6054 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 6055 complete(&adapter->init_done); 6056 break; 6057 case LINK_STATE_INDICATION: 6058 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6059 adapter->phys_link_state = 6060 crq->link_state_indication.phys_link_state; 6061 adapter->logical_link_state = 6062 crq->link_state_indication.logical_link_state; 6063 if (adapter->phys_link_state && adapter->logical_link_state) 6064 netif_carrier_on(netdev); 6065 else 6066 netif_carrier_off(netdev); 6067 break; 6068 case CHANGE_MAC_ADDR_RSP: 6069 netdev_dbg(netdev, "Got MAC address change Response\n"); 6070 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6071 break; 6072 case ERROR_INDICATION: 6073 netdev_dbg(netdev, "Got Error Indication\n"); 6074 handle_error_indication(crq, adapter); 6075 break; 6076 case REQUEST_STATISTICS_RSP: 6077 netdev_dbg(netdev, "Got Statistics Response\n"); 6078 complete(&adapter->stats_done); 6079 break; 6080 case QUERY_IP_OFFLOAD_RSP: 6081 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6082 handle_query_ip_offload_rsp(adapter); 6083 break; 6084 case MULTICAST_CTRL_RSP: 6085 netdev_dbg(netdev, "Got multicast control Response\n"); 6086 break; 6087 case CONTROL_IP_OFFLOAD_RSP: 6088 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6089 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6090 sizeof(adapter->ip_offload_ctrl), 6091 DMA_TO_DEVICE); 6092 complete(&adapter->init_done); 6093 break; 6094 case COLLECT_FW_TRACE_RSP: 6095 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6096 complete(&adapter->fw_done); 6097 break; 6098 case GET_VPD_SIZE_RSP: 6099 handle_vpd_size_rsp(crq, adapter); 6100 break; 6101 case GET_VPD_RSP: 6102 handle_vpd_rsp(crq, adapter); 6103 break; 6104 case QUERY_PHYS_PARMS_RSP: 6105 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6106 complete(&adapter->fw_done); 6107 break; 6108 default: 6109 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6110 gen_crq->cmd); 6111 } 6112 } 6113 6114 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6115 { 6116 struct ibmvnic_adapter *adapter = instance; 6117 6118 tasklet_schedule(&adapter->tasklet); 6119 return IRQ_HANDLED; 6120 } 6121 6122 static void ibmvnic_tasklet(struct tasklet_struct *t) 6123 { 6124 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6125 struct ibmvnic_crq_queue *queue = &adapter->crq; 6126 union ibmvnic_crq *crq; 6127 unsigned long flags; 6128 6129 spin_lock_irqsave(&queue->lock, flags); 6130 6131 /* Pull all the valid messages off the CRQ */ 6132 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6133 /* This barrier makes sure ibmvnic_next_crq()'s 6134 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6135 * before ibmvnic_handle_crq()'s 6136 * switch(gen_crq->first) and switch(gen_crq->cmd). 6137 */ 6138 dma_rmb(); 6139 ibmvnic_handle_crq(crq, adapter); 6140 crq->generic.first = 0; 6141 } 6142 6143 spin_unlock_irqrestore(&queue->lock, flags); 6144 } 6145 6146 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6147 { 6148 struct vio_dev *vdev = adapter->vdev; 6149 int rc; 6150 6151 do { 6152 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6153 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6154 6155 if (rc) 6156 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6157 6158 return rc; 6159 } 6160 6161 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6162 { 6163 struct ibmvnic_crq_queue *crq = &adapter->crq; 6164 struct device *dev = &adapter->vdev->dev; 6165 struct vio_dev *vdev = adapter->vdev; 6166 int rc; 6167 6168 /* Close the CRQ */ 6169 do { 6170 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6171 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6172 6173 /* Clean out the queue */ 6174 if (!crq->msgs) 6175 return -EINVAL; 6176 6177 memset(crq->msgs, 0, PAGE_SIZE); 6178 crq->cur = 0; 6179 crq->active = false; 6180 6181 /* And re-open it again */ 6182 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6183 crq->msg_token, PAGE_SIZE); 6184 6185 if (rc == H_CLOSED) 6186 /* Adapter is good, but other end is not ready */ 6187 dev_warn(dev, "Partner adapter not ready\n"); 6188 else if (rc != 0) 6189 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6190 6191 return rc; 6192 } 6193 6194 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6195 { 6196 struct ibmvnic_crq_queue *crq = &adapter->crq; 6197 struct vio_dev *vdev = adapter->vdev; 6198 long rc; 6199 6200 if (!crq->msgs) 6201 return; 6202 6203 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6204 free_irq(vdev->irq, adapter); 6205 tasklet_kill(&adapter->tasklet); 6206 do { 6207 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6208 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6209 6210 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6211 DMA_BIDIRECTIONAL); 6212 free_page((unsigned long)crq->msgs); 6213 crq->msgs = NULL; 6214 crq->active = false; 6215 } 6216 6217 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6218 { 6219 struct ibmvnic_crq_queue *crq = &adapter->crq; 6220 struct device *dev = &adapter->vdev->dev; 6221 struct vio_dev *vdev = adapter->vdev; 6222 int rc, retrc = -ENOMEM; 6223 6224 if (crq->msgs) 6225 return 0; 6226 6227 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6228 /* Should we allocate more than one page? */ 6229 6230 if (!crq->msgs) 6231 return -ENOMEM; 6232 6233 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6234 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6235 DMA_BIDIRECTIONAL); 6236 if (dma_mapping_error(dev, crq->msg_token)) 6237 goto map_failed; 6238 6239 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6240 crq->msg_token, PAGE_SIZE); 6241 6242 if (rc == H_RESOURCE) 6243 /* maybe kexecing and resource is busy. try a reset */ 6244 rc = ibmvnic_reset_crq(adapter); 6245 retrc = rc; 6246 6247 if (rc == H_CLOSED) { 6248 dev_warn(dev, "Partner adapter not ready\n"); 6249 } else if (rc) { 6250 dev_warn(dev, "Error %d opening adapter\n", rc); 6251 goto reg_crq_failed; 6252 } 6253 6254 retrc = 0; 6255 6256 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6257 6258 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6259 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6260 adapter->vdev->unit_address); 6261 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6262 if (rc) { 6263 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6264 vdev->irq, rc); 6265 goto req_irq_failed; 6266 } 6267 6268 rc = vio_enable_interrupts(vdev); 6269 if (rc) { 6270 dev_err(dev, "Error %d enabling interrupts\n", rc); 6271 goto req_irq_failed; 6272 } 6273 6274 crq->cur = 0; 6275 spin_lock_init(&crq->lock); 6276 6277 /* process any CRQs that were queued before we enabled interrupts */ 6278 tasklet_schedule(&adapter->tasklet); 6279 6280 return retrc; 6281 6282 req_irq_failed: 6283 tasklet_kill(&adapter->tasklet); 6284 do { 6285 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6286 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6287 reg_crq_failed: 6288 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6289 map_failed: 6290 free_page((unsigned long)crq->msgs); 6291 crq->msgs = NULL; 6292 return retrc; 6293 } 6294 6295 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6296 { 6297 struct device *dev = &adapter->vdev->dev; 6298 unsigned long timeout = msecs_to_jiffies(20000); 6299 u64 old_num_rx_queues = adapter->req_rx_queues; 6300 u64 old_num_tx_queues = adapter->req_tx_queues; 6301 int rc; 6302 6303 adapter->from_passive_init = false; 6304 6305 rc = ibmvnic_send_crq_init(adapter); 6306 if (rc) { 6307 dev_err(dev, "Send crq init failed with error %d\n", rc); 6308 return rc; 6309 } 6310 6311 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6312 dev_err(dev, "Initialization sequence timed out\n"); 6313 return -ETIMEDOUT; 6314 } 6315 6316 if (adapter->init_done_rc) { 6317 release_crq_queue(adapter); 6318 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6319 return adapter->init_done_rc; 6320 } 6321 6322 if (adapter->from_passive_init) { 6323 adapter->state = VNIC_OPEN; 6324 adapter->from_passive_init = false; 6325 dev_err(dev, "CRQ-init failed, passive-init\n"); 6326 return -EINVAL; 6327 } 6328 6329 if (reset && 6330 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6331 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6332 if (adapter->req_rx_queues != old_num_rx_queues || 6333 adapter->req_tx_queues != old_num_tx_queues) { 6334 release_sub_crqs(adapter, 0); 6335 rc = init_sub_crqs(adapter); 6336 } else { 6337 /* no need to reinitialize completely, but we do 6338 * need to clean up transmits that were in flight 6339 * when we processed the reset. Failure to do so 6340 * will confound the upper layer, usually TCP, by 6341 * creating the illusion of transmits that are 6342 * awaiting completion. 6343 */ 6344 clean_tx_pools(adapter); 6345 6346 rc = reset_sub_crq_queues(adapter); 6347 } 6348 } else { 6349 rc = init_sub_crqs(adapter); 6350 } 6351 6352 if (rc) { 6353 dev_err(dev, "Initialization of sub crqs failed\n"); 6354 release_crq_queue(adapter); 6355 return rc; 6356 } 6357 6358 rc = init_sub_crq_irqs(adapter); 6359 if (rc) { 6360 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6361 release_crq_queue(adapter); 6362 } 6363 6364 return rc; 6365 } 6366 6367 static struct device_attribute dev_attr_failover; 6368 6369 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6370 { 6371 struct ibmvnic_adapter *adapter; 6372 struct net_device *netdev; 6373 unsigned char *mac_addr_p; 6374 unsigned long flags; 6375 bool init_success; 6376 int rc; 6377 6378 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6379 dev->unit_address); 6380 6381 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6382 VETH_MAC_ADDR, NULL); 6383 if (!mac_addr_p) { 6384 dev_err(&dev->dev, 6385 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6386 __FILE__, __LINE__); 6387 return 0; 6388 } 6389 6390 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6391 IBMVNIC_MAX_QUEUES); 6392 if (!netdev) 6393 return -ENOMEM; 6394 6395 adapter = netdev_priv(netdev); 6396 adapter->state = VNIC_PROBING; 6397 dev_set_drvdata(&dev->dev, netdev); 6398 adapter->vdev = dev; 6399 adapter->netdev = netdev; 6400 adapter->login_pending = false; 6401 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6402 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6403 bitmap_set(adapter->map_ids, 0, 1); 6404 6405 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6406 eth_hw_addr_set(netdev, adapter->mac_addr); 6407 netdev->irq = dev->irq; 6408 netdev->netdev_ops = &ibmvnic_netdev_ops; 6409 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6410 SET_NETDEV_DEV(netdev, &dev->dev); 6411 6412 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6413 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6414 __ibmvnic_delayed_reset); 6415 INIT_LIST_HEAD(&adapter->rwi_list); 6416 spin_lock_init(&adapter->rwi_lock); 6417 spin_lock_init(&adapter->state_lock); 6418 mutex_init(&adapter->fw_lock); 6419 init_completion(&adapter->probe_done); 6420 init_completion(&adapter->init_done); 6421 init_completion(&adapter->fw_done); 6422 init_completion(&adapter->reset_done); 6423 init_completion(&adapter->stats_done); 6424 clear_bit(0, &adapter->resetting); 6425 adapter->prev_rx_buf_sz = 0; 6426 adapter->prev_mtu = 0; 6427 6428 init_success = false; 6429 do { 6430 reinit_init_done(adapter); 6431 6432 /* clear any failovers we got in the previous pass 6433 * since we are reinitializing the CRQ 6434 */ 6435 adapter->failover_pending = false; 6436 6437 /* If we had already initialized CRQ, we may have one or 6438 * more resets queued already. Discard those and release 6439 * the CRQ before initializing the CRQ again. 6440 */ 6441 release_crq_queue(adapter); 6442 6443 /* Since we are still in PROBING state, __ibmvnic_reset() 6444 * will not access the ->rwi_list and since we released CRQ, 6445 * we won't get _new_ transport events. But there maybe an 6446 * ongoing ibmvnic_reset() call. So serialize access to 6447 * rwi_list. If we win the race, ibvmnic_reset() could add 6448 * a reset after we purged but thats ok - we just may end 6449 * up with an extra reset (i.e similar to having two or more 6450 * resets in the queue at once). 6451 * CHECK. 6452 */ 6453 spin_lock_irqsave(&adapter->rwi_lock, flags); 6454 flush_reset_queue(adapter); 6455 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6456 6457 rc = init_crq_queue(adapter); 6458 if (rc) { 6459 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6460 rc); 6461 goto ibmvnic_init_fail; 6462 } 6463 6464 rc = ibmvnic_reset_init(adapter, false); 6465 } while (rc == -EAGAIN); 6466 6467 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6468 * partner is not ready. CRQ is not active. When the partner becomes 6469 * ready, we will do the passive init reset. 6470 */ 6471 6472 if (!rc) 6473 init_success = true; 6474 6475 rc = init_stats_buffers(adapter); 6476 if (rc) 6477 goto ibmvnic_init_fail; 6478 6479 rc = init_stats_token(adapter); 6480 if (rc) 6481 goto ibmvnic_stats_fail; 6482 6483 rc = device_create_file(&dev->dev, &dev_attr_failover); 6484 if (rc) 6485 goto ibmvnic_dev_file_err; 6486 6487 netif_carrier_off(netdev); 6488 6489 if (init_success) { 6490 adapter->state = VNIC_PROBED; 6491 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6492 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6493 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6494 } else { 6495 adapter->state = VNIC_DOWN; 6496 } 6497 6498 adapter->wait_for_reset = false; 6499 adapter->last_reset_time = jiffies; 6500 6501 rc = register_netdev(netdev); 6502 if (rc) { 6503 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6504 goto ibmvnic_register_fail; 6505 } 6506 dev_info(&dev->dev, "ibmvnic registered\n"); 6507 6508 rc = ibmvnic_cpu_notif_add(adapter); 6509 if (rc) { 6510 netdev_err(netdev, "Registering cpu notifier failed\n"); 6511 goto cpu_notif_add_failed; 6512 } 6513 6514 complete(&adapter->probe_done); 6515 6516 return 0; 6517 6518 cpu_notif_add_failed: 6519 unregister_netdev(netdev); 6520 6521 ibmvnic_register_fail: 6522 device_remove_file(&dev->dev, &dev_attr_failover); 6523 6524 ibmvnic_dev_file_err: 6525 release_stats_token(adapter); 6526 6527 ibmvnic_stats_fail: 6528 release_stats_buffers(adapter); 6529 6530 ibmvnic_init_fail: 6531 release_sub_crqs(adapter, 1); 6532 release_crq_queue(adapter); 6533 6534 /* cleanup worker thread after releasing CRQ so we don't get 6535 * transport events (i.e new work items for the worker thread). 6536 */ 6537 adapter->state = VNIC_REMOVING; 6538 complete(&adapter->probe_done); 6539 flush_work(&adapter->ibmvnic_reset); 6540 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6541 6542 flush_reset_queue(adapter); 6543 6544 mutex_destroy(&adapter->fw_lock); 6545 free_netdev(netdev); 6546 6547 return rc; 6548 } 6549 6550 static void ibmvnic_remove(struct vio_dev *dev) 6551 { 6552 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6553 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6554 unsigned long flags; 6555 6556 spin_lock_irqsave(&adapter->state_lock, flags); 6557 6558 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6559 * finish. Then, set the state to REMOVING to prevent it from 6560 * scheduling any more work and to have reset functions ignore 6561 * any resets that have already been scheduled. Drop the lock 6562 * after setting state, so __ibmvnic_reset() which is called 6563 * from the flush_work() below, can make progress. 6564 */ 6565 spin_lock(&adapter->rwi_lock); 6566 adapter->state = VNIC_REMOVING; 6567 spin_unlock(&adapter->rwi_lock); 6568 6569 spin_unlock_irqrestore(&adapter->state_lock, flags); 6570 6571 ibmvnic_cpu_notif_remove(adapter); 6572 6573 flush_work(&adapter->ibmvnic_reset); 6574 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6575 6576 rtnl_lock(); 6577 unregister_netdevice(netdev); 6578 6579 release_resources(adapter); 6580 release_rx_pools(adapter); 6581 release_tx_pools(adapter); 6582 release_sub_crqs(adapter, 1); 6583 release_crq_queue(adapter); 6584 6585 release_stats_token(adapter); 6586 release_stats_buffers(adapter); 6587 6588 adapter->state = VNIC_REMOVED; 6589 6590 rtnl_unlock(); 6591 mutex_destroy(&adapter->fw_lock); 6592 device_remove_file(&dev->dev, &dev_attr_failover); 6593 free_netdev(netdev); 6594 dev_set_drvdata(&dev->dev, NULL); 6595 } 6596 6597 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6598 const char *buf, size_t count) 6599 { 6600 struct net_device *netdev = dev_get_drvdata(dev); 6601 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6602 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6603 __be64 session_token; 6604 long rc; 6605 6606 if (!sysfs_streq(buf, "1")) 6607 return -EINVAL; 6608 6609 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6610 H_GET_SESSION_TOKEN, 0, 0, 0); 6611 if (rc) { 6612 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6613 rc); 6614 goto last_resort; 6615 } 6616 6617 session_token = (__be64)retbuf[0]; 6618 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6619 be64_to_cpu(session_token)); 6620 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6621 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6622 if (rc) { 6623 netdev_err(netdev, 6624 "H_VIOCTL initiated failover failed, rc %ld\n", 6625 rc); 6626 goto last_resort; 6627 } 6628 6629 return count; 6630 6631 last_resort: 6632 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6633 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6634 6635 return count; 6636 } 6637 static DEVICE_ATTR_WO(failover); 6638 6639 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6640 { 6641 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6642 struct ibmvnic_adapter *adapter; 6643 struct iommu_table *tbl; 6644 unsigned long ret = 0; 6645 int i; 6646 6647 tbl = get_iommu_table_base(&vdev->dev); 6648 6649 /* netdev inits at probe time along with the structures we need below*/ 6650 if (!netdev) 6651 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6652 6653 adapter = netdev_priv(netdev); 6654 6655 ret += PAGE_SIZE; /* the crq message queue */ 6656 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6657 6658 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6659 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6660 6661 for (i = 0; i < adapter->num_active_rx_pools; i++) 6662 ret += adapter->rx_pool[i].size * 6663 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6664 6665 return ret; 6666 } 6667 6668 static int ibmvnic_resume(struct device *dev) 6669 { 6670 struct net_device *netdev = dev_get_drvdata(dev); 6671 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6672 6673 if (adapter->state != VNIC_OPEN) 6674 return 0; 6675 6676 tasklet_schedule(&adapter->tasklet); 6677 6678 return 0; 6679 } 6680 6681 static const struct vio_device_id ibmvnic_device_table[] = { 6682 {"network", "IBM,vnic"}, 6683 {"", "" } 6684 }; 6685 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6686 6687 static const struct dev_pm_ops ibmvnic_pm_ops = { 6688 .resume = ibmvnic_resume 6689 }; 6690 6691 static struct vio_driver ibmvnic_driver = { 6692 .id_table = ibmvnic_device_table, 6693 .probe = ibmvnic_probe, 6694 .remove = ibmvnic_remove, 6695 .get_desired_dma = ibmvnic_get_desired_dma, 6696 .name = ibmvnic_driver_name, 6697 .pm = &ibmvnic_pm_ops, 6698 }; 6699 6700 /* module functions */ 6701 static int __init ibmvnic_module_init(void) 6702 { 6703 int ret; 6704 6705 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6706 ibmvnic_cpu_online, 6707 ibmvnic_cpu_down_prep); 6708 if (ret < 0) 6709 goto out; 6710 ibmvnic_online = ret; 6711 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6712 NULL, ibmvnic_cpu_dead); 6713 if (ret) 6714 goto err_dead; 6715 6716 ret = vio_register_driver(&ibmvnic_driver); 6717 if (ret) 6718 goto err_vio_register; 6719 6720 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6721 IBMVNIC_DRIVER_VERSION); 6722 6723 return 0; 6724 err_vio_register: 6725 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6726 err_dead: 6727 cpuhp_remove_multi_state(ibmvnic_online); 6728 out: 6729 return ret; 6730 } 6731 6732 static void __exit ibmvnic_module_exit(void) 6733 { 6734 vio_unregister_driver(&ibmvnic_driver); 6735 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6736 cpuhp_remove_multi_state(ibmvnic_online); 6737 } 6738 6739 module_init(ibmvnic_module_init); 6740 module_exit(ibmvnic_module_exit); 6741