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].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_packets = 0; 2406 unsigned int tx_bytes = 0; 2407 dma_addr_t data_dma_addr; 2408 struct netdev_queue *txq; 2409 unsigned long lpar_rc; 2410 union sub_crq tx_crq; 2411 unsigned int offset; 2412 bool use_scrq_send_direct = false; 2413 int num_entries = 1; 2414 unsigned char *dst; 2415 int bufidx = 0; 2416 u8 proto = 0; 2417 2418 /* If a reset is in progress, drop the packet since 2419 * the scrqs may get torn down. Otherwise use the 2420 * rcu to ensure reset waits for us to complete. 2421 */ 2422 rcu_read_lock(); 2423 if (!adapter->tx_queues_active) { 2424 dev_kfree_skb_any(skb); 2425 2426 tx_send_failed++; 2427 tx_dropped++; 2428 ret = NETDEV_TX_OK; 2429 goto out; 2430 } 2431 2432 tx_scrq = adapter->tx_scrq[queue_num]; 2433 txq = netdev_get_tx_queue(netdev, queue_num); 2434 ind_bufp = &tx_scrq->ind_buf; 2435 2436 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2437 tx_dropped++; 2438 tx_send_failed++; 2439 ret = NETDEV_TX_OK; 2440 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2441 if (lpar_rc != H_SUCCESS) 2442 goto tx_err; 2443 goto out; 2444 } 2445 2446 if (skb_is_gso(skb)) 2447 tx_pool = &adapter->tso_pool[queue_num]; 2448 else 2449 tx_pool = &adapter->tx_pool[queue_num]; 2450 2451 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2452 2453 if (bufidx == IBMVNIC_INVALID_MAP) { 2454 dev_kfree_skb_any(skb); 2455 tx_send_failed++; 2456 tx_dropped++; 2457 ret = NETDEV_TX_OK; 2458 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2459 if (lpar_rc != H_SUCCESS) 2460 goto tx_err; 2461 goto out; 2462 } 2463 2464 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2465 2466 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2467 2468 dst = ltb->buff + offset; 2469 memset(dst, 0, tx_pool->buf_size); 2470 data_dma_addr = ltb->addr + offset; 2471 2472 /* if we are going to send_subcrq_direct this then we need to 2473 * update the checksum before copying the data into ltb. Essentially 2474 * these packets force disable CSO so that we can guarantee that 2475 * FW does not need header info and we can send direct. Also, vnic 2476 * server must be able to xmit standard packets without header data 2477 */ 2478 if (*hdrs == 0 && !skb_is_gso(skb) && 2479 !ind_bufp->index && !netdev_xmit_more()) { 2480 use_scrq_send_direct = true; 2481 if (skb->ip_summed == CHECKSUM_PARTIAL && 2482 skb_checksum_help(skb)) 2483 use_scrq_send_direct = false; 2484 } 2485 2486 if (skb_shinfo(skb)->nr_frags) { 2487 int cur, i; 2488 2489 /* Copy the head */ 2490 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2491 cur = skb_headlen(skb); 2492 2493 /* Copy the frags */ 2494 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2495 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2496 2497 memcpy(dst + cur, skb_frag_address(frag), 2498 skb_frag_size(frag)); 2499 cur += skb_frag_size(frag); 2500 } 2501 } else { 2502 skb_copy_from_linear_data(skb, dst, skb->len); 2503 } 2504 2505 tx_pool->consumer_index = 2506 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2507 2508 tx_buff = &tx_pool->tx_buff[bufidx]; 2509 2510 /* Sanity checks on our free map to make sure it points to an index 2511 * that is not being occupied by another skb. If skb memory is 2512 * not freed then we see congestion control kick in and halt tx. 2513 */ 2514 if (unlikely(tx_buff->skb)) { 2515 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n", 2516 skb_is_gso(skb) ? "tso_pool" : "tx_pool", 2517 queue_num, bufidx); 2518 dev_kfree_skb_any(tx_buff->skb); 2519 } 2520 2521 tx_buff->skb = skb; 2522 tx_buff->index = bufidx; 2523 tx_buff->pool_index = queue_num; 2524 2525 memset(&tx_crq, 0, sizeof(tx_crq)); 2526 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2527 tx_crq.v1.type = IBMVNIC_TX_DESC; 2528 tx_crq.v1.n_crq_elem = 1; 2529 tx_crq.v1.n_sge = 1; 2530 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2531 2532 if (skb_is_gso(skb)) 2533 tx_crq.v1.correlator = 2534 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2535 else 2536 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2537 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2538 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2539 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2540 2541 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2542 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2543 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2544 } 2545 2546 if (skb->protocol == htons(ETH_P_IP)) { 2547 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2548 proto = ip_hdr(skb)->protocol; 2549 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2551 proto = ipv6_hdr(skb)->nexthdr; 2552 } 2553 2554 if (proto == IPPROTO_TCP) 2555 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2556 else if (proto == IPPROTO_UDP) 2557 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2558 2559 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2560 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2561 hdrs += 2; 2562 } 2563 if (skb_is_gso(skb)) { 2564 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2565 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2566 hdrs += 2; 2567 } else if (use_scrq_send_direct) { 2568 /* See above comment, CSO disabled with direct xmit */ 2569 tx_crq.v1.flags1 &= ~(IBMVNIC_TX_CHKSUM_OFFLOAD); 2570 ind_bufp->index = 1; 2571 tx_buff->num_entries = 1; 2572 netdev_tx_sent_queue(txq, skb->len); 2573 ind_bufp->indir_arr[0] = tx_crq; 2574 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, false); 2575 if (lpar_rc != H_SUCCESS) 2576 goto tx_err; 2577 2578 goto early_exit; 2579 } 2580 2581 if ((*hdrs >> 7) & 1) 2582 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2583 2584 tx_crq.v1.n_crq_elem = num_entries; 2585 tx_buff->num_entries = num_entries; 2586 /* flush buffer if current entry can not fit */ 2587 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2588 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2589 if (lpar_rc != H_SUCCESS) 2590 goto tx_flush_err; 2591 } 2592 2593 indir_arr[0] = tx_crq; 2594 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2595 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2596 2597 ind_bufp->index += num_entries; 2598 if (__netdev_tx_sent_queue(txq, skb->len, 2599 netdev_xmit_more() && 2600 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2601 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2602 if (lpar_rc != H_SUCCESS) 2603 goto tx_err; 2604 } 2605 2606 early_exit: 2607 if (atomic_add_return(num_entries, &tx_scrq->used) 2608 >= adapter->req_tx_entries_per_subcrq) { 2609 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2610 netif_stop_subqueue(netdev, queue_num); 2611 } 2612 2613 tx_packets++; 2614 tx_bytes += skb->len; 2615 txq_trans_cond_update(txq); 2616 ret = NETDEV_TX_OK; 2617 goto out; 2618 2619 tx_flush_err: 2620 dev_kfree_skb_any(skb); 2621 tx_buff->skb = NULL; 2622 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2623 tx_pool->num_buffers - 1 : 2624 tx_pool->consumer_index - 1; 2625 tx_dropped++; 2626 tx_err: 2627 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2628 dev_err_ratelimited(dev, "tx: send failed\n"); 2629 2630 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2631 /* Disable TX and report carrier off if queue is closed 2632 * or pending failover. 2633 * Firmware guarantees that a signal will be sent to the 2634 * driver, triggering a reset or some other action. 2635 */ 2636 netif_tx_stop_all_queues(netdev); 2637 netif_carrier_off(netdev); 2638 } 2639 out: 2640 rcu_read_unlock(); 2641 netdev->stats.tx_dropped += tx_dropped; 2642 netdev->stats.tx_bytes += tx_bytes; 2643 netdev->stats.tx_packets += tx_packets; 2644 adapter->tx_send_failed += tx_send_failed; 2645 adapter->tx_map_failed += tx_map_failed; 2646 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2647 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2648 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2649 2650 return ret; 2651 } 2652 2653 static void ibmvnic_set_multi(struct net_device *netdev) 2654 { 2655 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2656 struct netdev_hw_addr *ha; 2657 union ibmvnic_crq crq; 2658 2659 memset(&crq, 0, sizeof(crq)); 2660 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2661 crq.request_capability.cmd = REQUEST_CAPABILITY; 2662 2663 if (netdev->flags & IFF_PROMISC) { 2664 if (!adapter->promisc_supported) 2665 return; 2666 } else { 2667 if (netdev->flags & IFF_ALLMULTI) { 2668 /* Accept all multicast */ 2669 memset(&crq, 0, sizeof(crq)); 2670 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2671 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2672 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2673 ibmvnic_send_crq(adapter, &crq); 2674 } else if (netdev_mc_empty(netdev)) { 2675 /* Reject all multicast */ 2676 memset(&crq, 0, sizeof(crq)); 2677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2678 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2679 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2680 ibmvnic_send_crq(adapter, &crq); 2681 } else { 2682 /* Accept one or more multicast(s) */ 2683 netdev_for_each_mc_addr(ha, netdev) { 2684 memset(&crq, 0, sizeof(crq)); 2685 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2686 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2687 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2688 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2689 ha->addr); 2690 ibmvnic_send_crq(adapter, &crq); 2691 } 2692 } 2693 } 2694 } 2695 2696 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2697 { 2698 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2699 union ibmvnic_crq crq; 2700 int rc; 2701 2702 if (!is_valid_ether_addr(dev_addr)) { 2703 rc = -EADDRNOTAVAIL; 2704 goto err; 2705 } 2706 2707 memset(&crq, 0, sizeof(crq)); 2708 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2709 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2710 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2711 2712 mutex_lock(&adapter->fw_lock); 2713 adapter->fw_done_rc = 0; 2714 reinit_completion(&adapter->fw_done); 2715 2716 rc = ibmvnic_send_crq(adapter, &crq); 2717 if (rc) { 2718 rc = -EIO; 2719 mutex_unlock(&adapter->fw_lock); 2720 goto err; 2721 } 2722 2723 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2724 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2725 if (rc || adapter->fw_done_rc) { 2726 rc = -EIO; 2727 mutex_unlock(&adapter->fw_lock); 2728 goto err; 2729 } 2730 mutex_unlock(&adapter->fw_lock); 2731 return 0; 2732 err: 2733 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2734 return rc; 2735 } 2736 2737 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2738 { 2739 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2740 struct sockaddr *addr = p; 2741 int rc; 2742 2743 rc = 0; 2744 if (!is_valid_ether_addr(addr->sa_data)) 2745 return -EADDRNOTAVAIL; 2746 2747 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2748 if (adapter->state != VNIC_PROBED) 2749 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2750 2751 return rc; 2752 } 2753 2754 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2755 { 2756 switch (reason) { 2757 case VNIC_RESET_FAILOVER: 2758 return "FAILOVER"; 2759 case VNIC_RESET_MOBILITY: 2760 return "MOBILITY"; 2761 case VNIC_RESET_FATAL: 2762 return "FATAL"; 2763 case VNIC_RESET_NON_FATAL: 2764 return "NON_FATAL"; 2765 case VNIC_RESET_TIMEOUT: 2766 return "TIMEOUT"; 2767 case VNIC_RESET_CHANGE_PARAM: 2768 return "CHANGE_PARAM"; 2769 case VNIC_RESET_PASSIVE_INIT: 2770 return "PASSIVE_INIT"; 2771 } 2772 return "UNKNOWN"; 2773 } 2774 2775 /* 2776 * Initialize the init_done completion and return code values. We 2777 * can get a transport event just after registering the CRQ and the 2778 * tasklet will use this to communicate the transport event. To ensure 2779 * we don't miss the notification/error, initialize these _before_ 2780 * regisering the CRQ. 2781 */ 2782 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2783 { 2784 reinit_completion(&adapter->init_done); 2785 adapter->init_done_rc = 0; 2786 } 2787 2788 /* 2789 * do_reset returns zero if we are able to keep processing reset events, or 2790 * non-zero if we hit a fatal error and must halt. 2791 */ 2792 static int do_reset(struct ibmvnic_adapter *adapter, 2793 struct ibmvnic_rwi *rwi, u32 reset_state) 2794 { 2795 struct net_device *netdev = adapter->netdev; 2796 u64 old_num_rx_queues, old_num_tx_queues; 2797 u64 old_num_rx_slots, old_num_tx_slots; 2798 int rc; 2799 2800 netdev_dbg(adapter->netdev, 2801 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2802 adapter_state_to_string(adapter->state), 2803 adapter->failover_pending, 2804 reset_reason_to_string(rwi->reset_reason), 2805 adapter_state_to_string(reset_state)); 2806 2807 adapter->reset_reason = rwi->reset_reason; 2808 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2809 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2810 rtnl_lock(); 2811 2812 /* Now that we have the rtnl lock, clear any pending failover. 2813 * This will ensure ibmvnic_open() has either completed or will 2814 * block until failover is complete. 2815 */ 2816 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2817 adapter->failover_pending = false; 2818 2819 /* read the state and check (again) after getting rtnl */ 2820 reset_state = adapter->state; 2821 2822 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2823 rc = -EBUSY; 2824 goto out; 2825 } 2826 2827 netif_carrier_off(netdev); 2828 2829 old_num_rx_queues = adapter->req_rx_queues; 2830 old_num_tx_queues = adapter->req_tx_queues; 2831 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2832 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2833 2834 ibmvnic_cleanup(netdev); 2835 2836 if (reset_state == VNIC_OPEN && 2837 adapter->reset_reason != VNIC_RESET_MOBILITY && 2838 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2839 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2840 rc = __ibmvnic_close(netdev); 2841 if (rc) 2842 goto out; 2843 } else { 2844 adapter->state = VNIC_CLOSING; 2845 2846 /* Release the RTNL lock before link state change and 2847 * re-acquire after the link state change to allow 2848 * linkwatch_event to grab the RTNL lock and run during 2849 * a reset. 2850 */ 2851 rtnl_unlock(); 2852 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2853 rtnl_lock(); 2854 if (rc) 2855 goto out; 2856 2857 if (adapter->state == VNIC_OPEN) { 2858 /* When we dropped rtnl, ibmvnic_open() got 2859 * it and noticed that we are resetting and 2860 * set the adapter state to OPEN. Update our 2861 * new "target" state, and resume the reset 2862 * from VNIC_CLOSING state. 2863 */ 2864 netdev_dbg(netdev, 2865 "Open changed state from %s, updating.\n", 2866 adapter_state_to_string(reset_state)); 2867 reset_state = VNIC_OPEN; 2868 adapter->state = VNIC_CLOSING; 2869 } 2870 2871 if (adapter->state != VNIC_CLOSING) { 2872 /* If someone else changed the adapter state 2873 * when we dropped the rtnl, fail the reset 2874 */ 2875 rc = -EAGAIN; 2876 goto out; 2877 } 2878 adapter->state = VNIC_CLOSED; 2879 } 2880 } 2881 2882 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2883 release_resources(adapter); 2884 release_sub_crqs(adapter, 1); 2885 release_crq_queue(adapter); 2886 } 2887 2888 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2889 /* remove the closed state so when we call open it appears 2890 * we are coming from the probed state. 2891 */ 2892 adapter->state = VNIC_PROBED; 2893 2894 reinit_init_done(adapter); 2895 2896 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2897 rc = init_crq_queue(adapter); 2898 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2899 rc = ibmvnic_reenable_crq_queue(adapter); 2900 release_sub_crqs(adapter, 1); 2901 } else { 2902 rc = ibmvnic_reset_crq(adapter); 2903 if (rc == H_CLOSED || rc == H_SUCCESS) { 2904 rc = vio_enable_interrupts(adapter->vdev); 2905 if (rc) 2906 netdev_err(adapter->netdev, 2907 "Reset failed to enable interrupts. rc=%d\n", 2908 rc); 2909 } 2910 } 2911 2912 if (rc) { 2913 netdev_err(adapter->netdev, 2914 "Reset couldn't initialize crq. rc=%d\n", rc); 2915 goto out; 2916 } 2917 2918 rc = ibmvnic_reset_init(adapter, true); 2919 if (rc) 2920 goto out; 2921 2922 /* If the adapter was in PROBE or DOWN state prior to the reset, 2923 * exit here. 2924 */ 2925 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2926 rc = 0; 2927 goto out; 2928 } 2929 2930 rc = ibmvnic_login(netdev); 2931 if (rc) 2932 goto out; 2933 2934 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2935 rc = init_resources(adapter); 2936 if (rc) 2937 goto out; 2938 } else if (adapter->req_rx_queues != old_num_rx_queues || 2939 adapter->req_tx_queues != old_num_tx_queues || 2940 adapter->req_rx_add_entries_per_subcrq != 2941 old_num_rx_slots || 2942 adapter->req_tx_entries_per_subcrq != 2943 old_num_tx_slots || 2944 !adapter->rx_pool || 2945 !adapter->tso_pool || 2946 !adapter->tx_pool) { 2947 release_napi(adapter); 2948 release_vpd_data(adapter); 2949 2950 rc = init_resources(adapter); 2951 if (rc) 2952 goto out; 2953 2954 } else { 2955 rc = init_tx_pools(netdev); 2956 if (rc) { 2957 netdev_dbg(netdev, 2958 "init tx pools failed (%d)\n", 2959 rc); 2960 goto out; 2961 } 2962 2963 rc = init_rx_pools(netdev); 2964 if (rc) { 2965 netdev_dbg(netdev, 2966 "init rx pools failed (%d)\n", 2967 rc); 2968 goto out; 2969 } 2970 } 2971 ibmvnic_disable_irqs(adapter); 2972 } 2973 adapter->state = VNIC_CLOSED; 2974 2975 if (reset_state == VNIC_CLOSED) { 2976 rc = 0; 2977 goto out; 2978 } 2979 2980 rc = __ibmvnic_open(netdev); 2981 if (rc) { 2982 rc = IBMVNIC_OPEN_FAILED; 2983 goto out; 2984 } 2985 2986 /* refresh device's multicast list */ 2987 ibmvnic_set_multi(netdev); 2988 2989 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2990 adapter->reset_reason == VNIC_RESET_MOBILITY) 2991 __netdev_notify_peers(netdev); 2992 2993 rc = 0; 2994 2995 out: 2996 /* restore the adapter state if reset failed */ 2997 if (rc) 2998 adapter->state = reset_state; 2999 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 3000 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 3001 rtnl_unlock(); 3002 3003 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 3004 adapter_state_to_string(adapter->state), 3005 adapter->failover_pending, rc); 3006 return rc; 3007 } 3008 3009 static int do_hard_reset(struct ibmvnic_adapter *adapter, 3010 struct ibmvnic_rwi *rwi, u32 reset_state) 3011 { 3012 struct net_device *netdev = adapter->netdev; 3013 int rc; 3014 3015 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 3016 reset_reason_to_string(rwi->reset_reason)); 3017 3018 /* read the state and check (again) after getting rtnl */ 3019 reset_state = adapter->state; 3020 3021 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 3022 rc = -EBUSY; 3023 goto out; 3024 } 3025 3026 netif_carrier_off(netdev); 3027 adapter->reset_reason = rwi->reset_reason; 3028 3029 ibmvnic_cleanup(netdev); 3030 release_resources(adapter); 3031 release_sub_crqs(adapter, 0); 3032 release_crq_queue(adapter); 3033 3034 /* remove the closed state so when we call open it appears 3035 * we are coming from the probed state. 3036 */ 3037 adapter->state = VNIC_PROBED; 3038 3039 reinit_init_done(adapter); 3040 3041 rc = init_crq_queue(adapter); 3042 if (rc) { 3043 netdev_err(adapter->netdev, 3044 "Couldn't initialize crq. rc=%d\n", rc); 3045 goto out; 3046 } 3047 3048 rc = ibmvnic_reset_init(adapter, false); 3049 if (rc) 3050 goto out; 3051 3052 /* If the adapter was in PROBE or DOWN state prior to the reset, 3053 * exit here. 3054 */ 3055 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3056 goto out; 3057 3058 rc = ibmvnic_login(netdev); 3059 if (rc) 3060 goto out; 3061 3062 rc = init_resources(adapter); 3063 if (rc) 3064 goto out; 3065 3066 ibmvnic_disable_irqs(adapter); 3067 adapter->state = VNIC_CLOSED; 3068 3069 if (reset_state == VNIC_CLOSED) 3070 goto out; 3071 3072 rc = __ibmvnic_open(netdev); 3073 if (rc) { 3074 rc = IBMVNIC_OPEN_FAILED; 3075 goto out; 3076 } 3077 3078 __netdev_notify_peers(netdev); 3079 out: 3080 /* restore adapter state if reset failed */ 3081 if (rc) 3082 adapter->state = reset_state; 3083 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3084 adapter_state_to_string(adapter->state), 3085 adapter->failover_pending, rc); 3086 return rc; 3087 } 3088 3089 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3090 { 3091 struct ibmvnic_rwi *rwi; 3092 unsigned long flags; 3093 3094 spin_lock_irqsave(&adapter->rwi_lock, flags); 3095 3096 if (!list_empty(&adapter->rwi_list)) { 3097 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3098 list); 3099 list_del(&rwi->list); 3100 } else { 3101 rwi = NULL; 3102 } 3103 3104 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3105 return rwi; 3106 } 3107 3108 /** 3109 * do_passive_init - complete probing when partner device is detected. 3110 * @adapter: ibmvnic_adapter struct 3111 * 3112 * If the ibmvnic device does not have a partner device to communicate with at boot 3113 * and that partner device comes online at a later time, this function is called 3114 * to complete the initialization process of ibmvnic device. 3115 * Caller is expected to hold rtnl_lock(). 3116 * 3117 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3118 * in the down state. 3119 * Returns 0 upon success and the device is in PROBED state. 3120 */ 3121 3122 static int do_passive_init(struct ibmvnic_adapter *adapter) 3123 { 3124 unsigned long timeout = msecs_to_jiffies(30000); 3125 struct net_device *netdev = adapter->netdev; 3126 struct device *dev = &adapter->vdev->dev; 3127 int rc; 3128 3129 netdev_dbg(netdev, "Partner device found, probing.\n"); 3130 3131 adapter->state = VNIC_PROBING; 3132 reinit_completion(&adapter->init_done); 3133 adapter->init_done_rc = 0; 3134 adapter->crq.active = true; 3135 3136 rc = send_crq_init_complete(adapter); 3137 if (rc) 3138 goto out; 3139 3140 rc = send_version_xchg(adapter); 3141 if (rc) 3142 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3143 3144 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3145 dev_err(dev, "Initialization sequence timed out\n"); 3146 rc = -ETIMEDOUT; 3147 goto out; 3148 } 3149 3150 rc = init_sub_crqs(adapter); 3151 if (rc) { 3152 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3153 goto out; 3154 } 3155 3156 rc = init_sub_crq_irqs(adapter); 3157 if (rc) { 3158 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3159 goto init_failed; 3160 } 3161 3162 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3163 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3164 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3165 3166 adapter->state = VNIC_PROBED; 3167 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3168 3169 return 0; 3170 3171 init_failed: 3172 release_sub_crqs(adapter, 1); 3173 out: 3174 adapter->state = VNIC_DOWN; 3175 return rc; 3176 } 3177 3178 static void __ibmvnic_reset(struct work_struct *work) 3179 { 3180 struct ibmvnic_adapter *adapter; 3181 unsigned int timeout = 5000; 3182 struct ibmvnic_rwi *tmprwi; 3183 bool saved_state = false; 3184 struct ibmvnic_rwi *rwi; 3185 unsigned long flags; 3186 struct device *dev; 3187 bool need_reset; 3188 int num_fails = 0; 3189 u32 reset_state; 3190 int rc = 0; 3191 3192 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3193 dev = &adapter->vdev->dev; 3194 3195 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3196 * or if another reset is in progress, defer work for now. If probe 3197 * eventually fails it will flush and terminate our work. 3198 * 3199 * Three possibilities here: 3200 * 1. Adpater being removed - just return 3201 * 2. Timed out on probe or another reset in progress - delay the work 3202 * 3. Completed probe - perform any resets in queue 3203 */ 3204 if (adapter->state == VNIC_PROBING && 3205 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3206 dev_err(dev, "Reset thread timed out on probe"); 3207 queue_delayed_work(system_long_wq, 3208 &adapter->ibmvnic_delayed_reset, 3209 IBMVNIC_RESET_DELAY); 3210 return; 3211 } 3212 3213 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3214 if (adapter->state == VNIC_REMOVING) 3215 return; 3216 3217 /* ->rwi_list is stable now (no one else is removing entries) */ 3218 3219 /* ibmvnic_probe() may have purged the reset queue after we were 3220 * scheduled to process a reset so there maybe no resets to process. 3221 * Before setting the ->resetting bit though, we have to make sure 3222 * that there is infact a reset to process. Otherwise we may race 3223 * with ibmvnic_open() and end up leaving the vnic down: 3224 * 3225 * __ibmvnic_reset() ibmvnic_open() 3226 * ----------------- -------------- 3227 * 3228 * set ->resetting bit 3229 * find ->resetting bit is set 3230 * set ->state to IBMVNIC_OPEN (i.e 3231 * assume reset will open device) 3232 * return 3233 * find reset queue empty 3234 * return 3235 * 3236 * Neither performed vnic login/open and vnic stays down 3237 * 3238 * If we hold the lock and conditionally set the bit, either we 3239 * or ibmvnic_open() will complete the open. 3240 */ 3241 need_reset = false; 3242 spin_lock(&adapter->rwi_lock); 3243 if (!list_empty(&adapter->rwi_list)) { 3244 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3245 queue_delayed_work(system_long_wq, 3246 &adapter->ibmvnic_delayed_reset, 3247 IBMVNIC_RESET_DELAY); 3248 } else { 3249 need_reset = true; 3250 } 3251 } 3252 spin_unlock(&adapter->rwi_lock); 3253 3254 if (!need_reset) 3255 return; 3256 3257 rwi = get_next_rwi(adapter); 3258 while (rwi) { 3259 spin_lock_irqsave(&adapter->state_lock, flags); 3260 3261 if (adapter->state == VNIC_REMOVING || 3262 adapter->state == VNIC_REMOVED) { 3263 spin_unlock_irqrestore(&adapter->state_lock, flags); 3264 kfree(rwi); 3265 rc = EBUSY; 3266 break; 3267 } 3268 3269 if (!saved_state) { 3270 reset_state = adapter->state; 3271 saved_state = true; 3272 } 3273 spin_unlock_irqrestore(&adapter->state_lock, flags); 3274 3275 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3276 rtnl_lock(); 3277 rc = do_passive_init(adapter); 3278 rtnl_unlock(); 3279 if (!rc) 3280 netif_carrier_on(adapter->netdev); 3281 } else if (adapter->force_reset_recovery) { 3282 /* Since we are doing a hard reset now, clear the 3283 * failover_pending flag so we don't ignore any 3284 * future MOBILITY or other resets. 3285 */ 3286 adapter->failover_pending = false; 3287 3288 /* Transport event occurred during previous reset */ 3289 if (adapter->wait_for_reset) { 3290 /* Previous was CHANGE_PARAM; caller locked */ 3291 adapter->force_reset_recovery = false; 3292 rc = do_hard_reset(adapter, rwi, reset_state); 3293 } else { 3294 rtnl_lock(); 3295 adapter->force_reset_recovery = false; 3296 rc = do_hard_reset(adapter, rwi, reset_state); 3297 rtnl_unlock(); 3298 } 3299 if (rc) 3300 num_fails++; 3301 else 3302 num_fails = 0; 3303 3304 /* If auto-priority-failover is enabled we can get 3305 * back to back failovers during resets, resulting 3306 * in at least two failed resets (from high-priority 3307 * backing device to low-priority one and then back) 3308 * If resets continue to fail beyond that, give the 3309 * adapter some time to settle down before retrying. 3310 */ 3311 if (num_fails >= 3) { 3312 netdev_dbg(adapter->netdev, 3313 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3314 adapter_state_to_string(adapter->state), 3315 num_fails); 3316 set_current_state(TASK_UNINTERRUPTIBLE); 3317 schedule_timeout(60 * HZ); 3318 } 3319 } else { 3320 rc = do_reset(adapter, rwi, reset_state); 3321 } 3322 tmprwi = rwi; 3323 adapter->last_reset_time = jiffies; 3324 3325 if (rc) 3326 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3327 3328 rwi = get_next_rwi(adapter); 3329 3330 /* 3331 * If there are no resets queued and the previous reset failed, 3332 * the adapter would be in an undefined state. So retry the 3333 * previous reset as a hard reset. 3334 * 3335 * Else, free the previous rwi and, if there is another reset 3336 * queued, process the new reset even if previous reset failed 3337 * (the previous reset could have failed because of a fail 3338 * over for instance, so process the fail over). 3339 */ 3340 if (!rwi && rc) 3341 rwi = tmprwi; 3342 else 3343 kfree(tmprwi); 3344 3345 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3346 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3347 adapter->force_reset_recovery = true; 3348 } 3349 3350 if (adapter->wait_for_reset) { 3351 adapter->reset_done_rc = rc; 3352 complete(&adapter->reset_done); 3353 } 3354 3355 clear_bit_unlock(0, &adapter->resetting); 3356 3357 netdev_dbg(adapter->netdev, 3358 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3359 adapter_state_to_string(adapter->state), 3360 adapter->force_reset_recovery, 3361 adapter->wait_for_reset); 3362 } 3363 3364 static void __ibmvnic_delayed_reset(struct work_struct *work) 3365 { 3366 struct ibmvnic_adapter *adapter; 3367 3368 adapter = container_of(work, struct ibmvnic_adapter, 3369 ibmvnic_delayed_reset.work); 3370 __ibmvnic_reset(&adapter->ibmvnic_reset); 3371 } 3372 3373 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3374 { 3375 struct list_head *entry, *tmp_entry; 3376 3377 if (!list_empty(&adapter->rwi_list)) { 3378 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3379 list_del(entry); 3380 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3381 } 3382 } 3383 } 3384 3385 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3386 enum ibmvnic_reset_reason reason) 3387 { 3388 struct net_device *netdev = adapter->netdev; 3389 struct ibmvnic_rwi *rwi, *tmp; 3390 unsigned long flags; 3391 int ret; 3392 3393 spin_lock_irqsave(&adapter->rwi_lock, flags); 3394 3395 /* If failover is pending don't schedule any other reset. 3396 * Instead let the failover complete. If there is already a 3397 * a failover reset scheduled, we will detect and drop the 3398 * duplicate reset when walking the ->rwi_list below. 3399 */ 3400 if (adapter->state == VNIC_REMOVING || 3401 adapter->state == VNIC_REMOVED || 3402 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3403 ret = EBUSY; 3404 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3405 goto err; 3406 } 3407 3408 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3409 if (tmp->reset_reason == reason) { 3410 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3411 reset_reason_to_string(reason)); 3412 ret = EBUSY; 3413 goto err; 3414 } 3415 } 3416 3417 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3418 if (!rwi) { 3419 ret = ENOMEM; 3420 goto err; 3421 } 3422 /* if we just received a transport event, 3423 * flush reset queue and process this reset 3424 */ 3425 if (adapter->force_reset_recovery) 3426 flush_reset_queue(adapter); 3427 3428 rwi->reset_reason = reason; 3429 list_add_tail(&rwi->list, &adapter->rwi_list); 3430 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3431 reset_reason_to_string(reason)); 3432 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3433 3434 ret = 0; 3435 err: 3436 /* ibmvnic_close() below can block, so drop the lock first */ 3437 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3438 3439 if (ret == ENOMEM) 3440 ibmvnic_close(netdev); 3441 3442 return -ret; 3443 } 3444 3445 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3446 { 3447 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3448 3449 if (test_bit(0, &adapter->resetting)) { 3450 netdev_err(adapter->netdev, 3451 "Adapter is resetting, skip timeout reset\n"); 3452 return; 3453 } 3454 /* No queuing up reset until at least 5 seconds (default watchdog val) 3455 * after last reset 3456 */ 3457 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3458 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3459 return; 3460 } 3461 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3462 } 3463 3464 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3465 struct ibmvnic_rx_buff *rx_buff) 3466 { 3467 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3468 3469 rx_buff->skb = NULL; 3470 3471 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3472 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3473 3474 atomic_dec(&pool->available); 3475 } 3476 3477 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3478 { 3479 struct ibmvnic_sub_crq_queue *rx_scrq; 3480 struct ibmvnic_adapter *adapter; 3481 struct net_device *netdev; 3482 int frames_processed; 3483 int scrq_num; 3484 3485 netdev = napi->dev; 3486 adapter = netdev_priv(netdev); 3487 scrq_num = (int)(napi - adapter->napi); 3488 frames_processed = 0; 3489 rx_scrq = adapter->rx_scrq[scrq_num]; 3490 3491 restart_poll: 3492 while (frames_processed < budget) { 3493 struct sk_buff *skb; 3494 struct ibmvnic_rx_buff *rx_buff; 3495 union sub_crq *next; 3496 u32 length; 3497 u16 offset; 3498 u8 flags = 0; 3499 3500 if (unlikely(test_bit(0, &adapter->resetting) && 3501 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3502 enable_scrq_irq(adapter, rx_scrq); 3503 napi_complete_done(napi, frames_processed); 3504 return frames_processed; 3505 } 3506 3507 if (!pending_scrq(adapter, rx_scrq)) 3508 break; 3509 next = ibmvnic_next_scrq(adapter, rx_scrq); 3510 rx_buff = (struct ibmvnic_rx_buff *) 3511 be64_to_cpu(next->rx_comp.correlator); 3512 /* do error checking */ 3513 if (next->rx_comp.rc) { 3514 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3515 be16_to_cpu(next->rx_comp.rc)); 3516 /* free the entry */ 3517 next->rx_comp.first = 0; 3518 dev_kfree_skb_any(rx_buff->skb); 3519 remove_buff_from_pool(adapter, rx_buff); 3520 continue; 3521 } else if (!rx_buff->skb) { 3522 /* free the entry */ 3523 next->rx_comp.first = 0; 3524 remove_buff_from_pool(adapter, rx_buff); 3525 continue; 3526 } 3527 3528 length = be32_to_cpu(next->rx_comp.len); 3529 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3530 flags = next->rx_comp.flags; 3531 skb = rx_buff->skb; 3532 /* load long_term_buff before copying to skb */ 3533 dma_rmb(); 3534 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3535 length); 3536 3537 /* VLAN Header has been stripped by the system firmware and 3538 * needs to be inserted by the driver 3539 */ 3540 if (adapter->rx_vlan_header_insertion && 3541 (flags & IBMVNIC_VLAN_STRIPPED)) 3542 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3543 ntohs(next->rx_comp.vlan_tci)); 3544 3545 /* free the entry */ 3546 next->rx_comp.first = 0; 3547 remove_buff_from_pool(adapter, rx_buff); 3548 3549 skb_put(skb, length); 3550 skb->protocol = eth_type_trans(skb, netdev); 3551 skb_record_rx_queue(skb, scrq_num); 3552 3553 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3554 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3555 skb->ip_summed = CHECKSUM_UNNECESSARY; 3556 } 3557 3558 length = skb->len; 3559 napi_gro_receive(napi, skb); /* send it up */ 3560 netdev->stats.rx_packets++; 3561 netdev->stats.rx_bytes += length; 3562 adapter->rx_stats_buffers[scrq_num].packets++; 3563 adapter->rx_stats_buffers[scrq_num].bytes += length; 3564 frames_processed++; 3565 } 3566 3567 if (adapter->state != VNIC_CLOSING && 3568 (atomic_read(&adapter->rx_pool[scrq_num].available) < 3569 adapter->req_rx_add_entries_per_subcrq / 2)) 3570 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3571 if (frames_processed < budget) { 3572 if (napi_complete_done(napi, frames_processed)) { 3573 enable_scrq_irq(adapter, rx_scrq); 3574 if (pending_scrq(adapter, rx_scrq)) { 3575 if (napi_schedule(napi)) { 3576 disable_scrq_irq(adapter, rx_scrq); 3577 goto restart_poll; 3578 } 3579 } 3580 } 3581 } 3582 return frames_processed; 3583 } 3584 3585 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3586 { 3587 int rc, ret; 3588 3589 adapter->fallback.mtu = adapter->req_mtu; 3590 adapter->fallback.rx_queues = adapter->req_rx_queues; 3591 adapter->fallback.tx_queues = adapter->req_tx_queues; 3592 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3593 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3594 3595 reinit_completion(&adapter->reset_done); 3596 adapter->wait_for_reset = true; 3597 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3598 3599 if (rc) { 3600 ret = rc; 3601 goto out; 3602 } 3603 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3604 if (rc) { 3605 ret = -ENODEV; 3606 goto out; 3607 } 3608 3609 ret = 0; 3610 if (adapter->reset_done_rc) { 3611 ret = -EIO; 3612 adapter->desired.mtu = adapter->fallback.mtu; 3613 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3614 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3615 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3616 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3617 3618 reinit_completion(&adapter->reset_done); 3619 adapter->wait_for_reset = true; 3620 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3621 if (rc) { 3622 ret = rc; 3623 goto out; 3624 } 3625 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3626 60000); 3627 if (rc) { 3628 ret = -ENODEV; 3629 goto out; 3630 } 3631 } 3632 out: 3633 adapter->wait_for_reset = false; 3634 3635 return ret; 3636 } 3637 3638 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3639 { 3640 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3641 3642 adapter->desired.mtu = new_mtu + ETH_HLEN; 3643 3644 return wait_for_reset(adapter); 3645 } 3646 3647 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3648 struct net_device *dev, 3649 netdev_features_t features) 3650 { 3651 /* Some backing hardware adapters can not 3652 * handle packets with a MSS less than 224 3653 * or with only one segment. 3654 */ 3655 if (skb_is_gso(skb)) { 3656 if (skb_shinfo(skb)->gso_size < 224 || 3657 skb_shinfo(skb)->gso_segs == 1) 3658 features &= ~NETIF_F_GSO_MASK; 3659 } 3660 3661 return features; 3662 } 3663 3664 static const struct net_device_ops ibmvnic_netdev_ops = { 3665 .ndo_open = ibmvnic_open, 3666 .ndo_stop = ibmvnic_close, 3667 .ndo_start_xmit = ibmvnic_xmit, 3668 .ndo_set_rx_mode = ibmvnic_set_multi, 3669 .ndo_set_mac_address = ibmvnic_set_mac, 3670 .ndo_validate_addr = eth_validate_addr, 3671 .ndo_tx_timeout = ibmvnic_tx_timeout, 3672 .ndo_change_mtu = ibmvnic_change_mtu, 3673 .ndo_features_check = ibmvnic_features_check, 3674 }; 3675 3676 /* ethtool functions */ 3677 3678 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3679 struct ethtool_link_ksettings *cmd) 3680 { 3681 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3682 int rc; 3683 3684 rc = send_query_phys_parms(adapter); 3685 if (rc) { 3686 adapter->speed = SPEED_UNKNOWN; 3687 adapter->duplex = DUPLEX_UNKNOWN; 3688 } 3689 cmd->base.speed = adapter->speed; 3690 cmd->base.duplex = adapter->duplex; 3691 cmd->base.port = PORT_FIBRE; 3692 cmd->base.phy_address = 0; 3693 cmd->base.autoneg = AUTONEG_ENABLE; 3694 3695 return 0; 3696 } 3697 3698 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3699 struct ethtool_drvinfo *info) 3700 { 3701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3702 3703 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3704 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3705 strscpy(info->fw_version, adapter->fw_version, 3706 sizeof(info->fw_version)); 3707 } 3708 3709 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3710 { 3711 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3712 3713 return adapter->msg_enable; 3714 } 3715 3716 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3717 { 3718 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3719 3720 adapter->msg_enable = data; 3721 } 3722 3723 static u32 ibmvnic_get_link(struct net_device *netdev) 3724 { 3725 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3726 3727 /* Don't need to send a query because we request a logical link up at 3728 * init and then we wait for link state indications 3729 */ 3730 return adapter->logical_link_state; 3731 } 3732 3733 static void ibmvnic_get_ringparam(struct net_device *netdev, 3734 struct ethtool_ringparam *ring, 3735 struct kernel_ethtool_ringparam *kernel_ring, 3736 struct netlink_ext_ack *extack) 3737 { 3738 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3739 3740 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3741 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3742 ring->rx_mini_max_pending = 0; 3743 ring->rx_jumbo_max_pending = 0; 3744 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3745 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3746 ring->rx_mini_pending = 0; 3747 ring->rx_jumbo_pending = 0; 3748 } 3749 3750 static int ibmvnic_set_ringparam(struct net_device *netdev, 3751 struct ethtool_ringparam *ring, 3752 struct kernel_ethtool_ringparam *kernel_ring, 3753 struct netlink_ext_ack *extack) 3754 { 3755 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3756 3757 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3758 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3759 netdev_err(netdev, "Invalid request.\n"); 3760 netdev_err(netdev, "Max tx buffers = %llu\n", 3761 adapter->max_rx_add_entries_per_subcrq); 3762 netdev_err(netdev, "Max rx buffers = %llu\n", 3763 adapter->max_tx_entries_per_subcrq); 3764 return -EINVAL; 3765 } 3766 3767 adapter->desired.rx_entries = ring->rx_pending; 3768 adapter->desired.tx_entries = ring->tx_pending; 3769 3770 return wait_for_reset(adapter); 3771 } 3772 3773 static void ibmvnic_get_channels(struct net_device *netdev, 3774 struct ethtool_channels *channels) 3775 { 3776 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3777 3778 channels->max_rx = adapter->max_rx_queues; 3779 channels->max_tx = adapter->max_tx_queues; 3780 channels->max_other = 0; 3781 channels->max_combined = 0; 3782 channels->rx_count = adapter->req_rx_queues; 3783 channels->tx_count = adapter->req_tx_queues; 3784 channels->other_count = 0; 3785 channels->combined_count = 0; 3786 } 3787 3788 static int ibmvnic_set_channels(struct net_device *netdev, 3789 struct ethtool_channels *channels) 3790 { 3791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3792 3793 adapter->desired.rx_queues = channels->rx_count; 3794 adapter->desired.tx_queues = channels->tx_count; 3795 3796 return wait_for_reset(adapter); 3797 } 3798 3799 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3800 { 3801 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3802 int i; 3803 3804 if (stringset != ETH_SS_STATS) 3805 return; 3806 3807 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 3808 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3809 3810 for (i = 0; i < adapter->req_tx_queues; i++) { 3811 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3812 data += ETH_GSTRING_LEN; 3813 3814 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3815 data += ETH_GSTRING_LEN; 3816 3817 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 3818 data += ETH_GSTRING_LEN; 3819 } 3820 3821 for (i = 0; i < adapter->req_rx_queues; i++) { 3822 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3823 data += ETH_GSTRING_LEN; 3824 3825 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3826 data += ETH_GSTRING_LEN; 3827 3828 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3829 data += ETH_GSTRING_LEN; 3830 } 3831 } 3832 3833 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3834 { 3835 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3836 3837 switch (sset) { 3838 case ETH_SS_STATS: 3839 return ARRAY_SIZE(ibmvnic_stats) + 3840 adapter->req_tx_queues * NUM_TX_STATS + 3841 adapter->req_rx_queues * NUM_RX_STATS; 3842 default: 3843 return -EOPNOTSUPP; 3844 } 3845 } 3846 3847 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3848 struct ethtool_stats *stats, u64 *data) 3849 { 3850 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3851 union ibmvnic_crq crq; 3852 int i, j; 3853 int rc; 3854 3855 memset(&crq, 0, sizeof(crq)); 3856 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3857 crq.request_statistics.cmd = REQUEST_STATISTICS; 3858 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3859 crq.request_statistics.len = 3860 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3861 3862 /* Wait for data to be written */ 3863 reinit_completion(&adapter->stats_done); 3864 rc = ibmvnic_send_crq(adapter, &crq); 3865 if (rc) 3866 return; 3867 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3868 if (rc) 3869 return; 3870 3871 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3872 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3873 (adapter, ibmvnic_stats[i].offset)); 3874 3875 for (j = 0; j < adapter->req_tx_queues; j++) { 3876 data[i] = adapter->tx_stats_buffers[j].packets; 3877 i++; 3878 data[i] = adapter->tx_stats_buffers[j].bytes; 3879 i++; 3880 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3881 i++; 3882 } 3883 3884 for (j = 0; j < adapter->req_rx_queues; j++) { 3885 data[i] = adapter->rx_stats_buffers[j].packets; 3886 i++; 3887 data[i] = adapter->rx_stats_buffers[j].bytes; 3888 i++; 3889 data[i] = adapter->rx_stats_buffers[j].interrupts; 3890 i++; 3891 } 3892 } 3893 3894 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3895 .get_drvinfo = ibmvnic_get_drvinfo, 3896 .get_msglevel = ibmvnic_get_msglevel, 3897 .set_msglevel = ibmvnic_set_msglevel, 3898 .get_link = ibmvnic_get_link, 3899 .get_ringparam = ibmvnic_get_ringparam, 3900 .set_ringparam = ibmvnic_set_ringparam, 3901 .get_channels = ibmvnic_get_channels, 3902 .set_channels = ibmvnic_set_channels, 3903 .get_strings = ibmvnic_get_strings, 3904 .get_sset_count = ibmvnic_get_sset_count, 3905 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3906 .get_link_ksettings = ibmvnic_get_link_ksettings, 3907 }; 3908 3909 /* Routines for managing CRQs/sCRQs */ 3910 3911 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3912 struct ibmvnic_sub_crq_queue *scrq) 3913 { 3914 int rc; 3915 3916 if (!scrq) { 3917 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3918 return -EINVAL; 3919 } 3920 3921 if (scrq->irq) { 3922 free_irq(scrq->irq, scrq); 3923 irq_dispose_mapping(scrq->irq); 3924 scrq->irq = 0; 3925 } 3926 3927 if (scrq->msgs) { 3928 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3929 atomic_set(&scrq->used, 0); 3930 scrq->cur = 0; 3931 scrq->ind_buf.index = 0; 3932 } else { 3933 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3934 return -EINVAL; 3935 } 3936 3937 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3938 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3939 return rc; 3940 } 3941 3942 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3943 { 3944 int i, rc; 3945 3946 if (!adapter->tx_scrq || !adapter->rx_scrq) 3947 return -EINVAL; 3948 3949 ibmvnic_clean_affinity(adapter); 3950 3951 for (i = 0; i < adapter->req_tx_queues; i++) { 3952 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3953 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3954 if (rc) 3955 return rc; 3956 } 3957 3958 for (i = 0; i < adapter->req_rx_queues; i++) { 3959 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3960 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3961 if (rc) 3962 return rc; 3963 } 3964 3965 return rc; 3966 } 3967 3968 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3969 struct ibmvnic_sub_crq_queue *scrq, 3970 bool do_h_free) 3971 { 3972 struct device *dev = &adapter->vdev->dev; 3973 long rc; 3974 3975 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3976 3977 if (do_h_free) { 3978 /* Close the sub-crqs */ 3979 do { 3980 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3981 adapter->vdev->unit_address, 3982 scrq->crq_num); 3983 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3984 3985 if (rc) { 3986 netdev_err(adapter->netdev, 3987 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3988 scrq->crq_num, rc); 3989 } 3990 } 3991 3992 dma_free_coherent(dev, 3993 IBMVNIC_IND_ARR_SZ, 3994 scrq->ind_buf.indir_arr, 3995 scrq->ind_buf.indir_dma); 3996 3997 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3998 DMA_BIDIRECTIONAL); 3999 free_pages((unsigned long)scrq->msgs, 2); 4000 free_cpumask_var(scrq->affinity_mask); 4001 kfree(scrq); 4002 } 4003 4004 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 4005 *adapter) 4006 { 4007 struct device *dev = &adapter->vdev->dev; 4008 struct ibmvnic_sub_crq_queue *scrq; 4009 int rc; 4010 4011 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 4012 if (!scrq) 4013 return NULL; 4014 4015 scrq->msgs = 4016 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 4017 if (!scrq->msgs) { 4018 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 4019 goto zero_page_failed; 4020 } 4021 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 4022 goto cpumask_alloc_failed; 4023 4024 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 4025 DMA_BIDIRECTIONAL); 4026 if (dma_mapping_error(dev, scrq->msg_token)) { 4027 dev_warn(dev, "Couldn't map crq queue messages page\n"); 4028 goto map_failed; 4029 } 4030 4031 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4032 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 4033 4034 if (rc == H_RESOURCE) 4035 rc = ibmvnic_reset_crq(adapter); 4036 4037 if (rc == H_CLOSED) { 4038 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 4039 } else if (rc) { 4040 dev_warn(dev, "Error %d registering sub-crq\n", rc); 4041 goto reg_failed; 4042 } 4043 4044 scrq->adapter = adapter; 4045 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 4046 scrq->ind_buf.index = 0; 4047 4048 scrq->ind_buf.indir_arr = 4049 dma_alloc_coherent(dev, 4050 IBMVNIC_IND_ARR_SZ, 4051 &scrq->ind_buf.indir_dma, 4052 GFP_KERNEL); 4053 4054 if (!scrq->ind_buf.indir_arr) 4055 goto indir_failed; 4056 4057 spin_lock_init(&scrq->lock); 4058 4059 netdev_dbg(adapter->netdev, 4060 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4061 scrq->crq_num, scrq->hw_irq, scrq->irq); 4062 4063 return scrq; 4064 4065 indir_failed: 4066 do { 4067 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4068 adapter->vdev->unit_address, 4069 scrq->crq_num); 4070 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4071 reg_failed: 4072 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4073 DMA_BIDIRECTIONAL); 4074 map_failed: 4075 free_cpumask_var(scrq->affinity_mask); 4076 cpumask_alloc_failed: 4077 free_pages((unsigned long)scrq->msgs, 2); 4078 zero_page_failed: 4079 kfree(scrq); 4080 4081 return NULL; 4082 } 4083 4084 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4085 { 4086 int i; 4087 4088 ibmvnic_clean_affinity(adapter); 4089 if (adapter->tx_scrq) { 4090 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4091 if (!adapter->tx_scrq[i]) 4092 continue; 4093 4094 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4095 i); 4096 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4097 if (adapter->tx_scrq[i]->irq) { 4098 free_irq(adapter->tx_scrq[i]->irq, 4099 adapter->tx_scrq[i]); 4100 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4101 adapter->tx_scrq[i]->irq = 0; 4102 } 4103 4104 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4105 do_h_free); 4106 } 4107 4108 kfree(adapter->tx_scrq); 4109 adapter->tx_scrq = NULL; 4110 adapter->num_active_tx_scrqs = 0; 4111 } 4112 4113 /* Clean any remaining outstanding SKBs 4114 * we freed the irq so we won't be hearing 4115 * from them 4116 */ 4117 clean_tx_pools(adapter); 4118 4119 if (adapter->rx_scrq) { 4120 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4121 if (!adapter->rx_scrq[i]) 4122 continue; 4123 4124 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4125 i); 4126 if (adapter->rx_scrq[i]->irq) { 4127 free_irq(adapter->rx_scrq[i]->irq, 4128 adapter->rx_scrq[i]); 4129 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4130 adapter->rx_scrq[i]->irq = 0; 4131 } 4132 4133 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4134 do_h_free); 4135 } 4136 4137 kfree(adapter->rx_scrq); 4138 adapter->rx_scrq = NULL; 4139 adapter->num_active_rx_scrqs = 0; 4140 } 4141 } 4142 4143 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4144 struct ibmvnic_sub_crq_queue *scrq) 4145 { 4146 struct device *dev = &adapter->vdev->dev; 4147 unsigned long rc; 4148 4149 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4150 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4151 if (rc) 4152 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4153 scrq->hw_irq, rc); 4154 return rc; 4155 } 4156 4157 /* We can not use the IRQ chip EOI handler because that has the 4158 * unintended effect of changing the interrupt priority. 4159 */ 4160 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4161 { 4162 u64 val = 0xff000000 | scrq->hw_irq; 4163 unsigned long rc; 4164 4165 rc = plpar_hcall_norets(H_EOI, val); 4166 if (rc) 4167 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4168 } 4169 4170 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4171 * transmit or receive queue just prior to a partition migration. 4172 * Force an EOI after migration. 4173 */ 4174 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4175 struct ibmvnic_sub_crq_queue *scrq) 4176 { 4177 if (!xive_enabled()) 4178 ibmvnic_xics_eoi(dev, scrq); 4179 } 4180 4181 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4182 struct ibmvnic_sub_crq_queue *scrq) 4183 { 4184 struct device *dev = &adapter->vdev->dev; 4185 unsigned long rc; 4186 4187 if (scrq->hw_irq > 0x100000000ULL) { 4188 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4189 return 1; 4190 } 4191 4192 if (test_bit(0, &adapter->resetting) && 4193 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4194 ibmvnic_clear_pending_interrupt(dev, scrq); 4195 } 4196 4197 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4198 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4199 if (rc) 4200 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4201 scrq->hw_irq, rc); 4202 return rc; 4203 } 4204 4205 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4206 struct ibmvnic_sub_crq_queue *scrq) 4207 { 4208 struct device *dev = &adapter->vdev->dev; 4209 int num_packets = 0, total_bytes = 0; 4210 struct ibmvnic_tx_pool *tx_pool; 4211 struct ibmvnic_tx_buff *txbuff; 4212 struct netdev_queue *txq; 4213 union sub_crq *next; 4214 int index, i; 4215 4216 restart_loop: 4217 while (pending_scrq(adapter, scrq)) { 4218 unsigned int pool = scrq->pool_index; 4219 int num_entries = 0; 4220 next = ibmvnic_next_scrq(adapter, scrq); 4221 for (i = 0; i < next->tx_comp.num_comps; i++) { 4222 index = be32_to_cpu(next->tx_comp.correlators[i]); 4223 if (index & IBMVNIC_TSO_POOL_MASK) { 4224 tx_pool = &adapter->tso_pool[pool]; 4225 index &= ~IBMVNIC_TSO_POOL_MASK; 4226 } else { 4227 tx_pool = &adapter->tx_pool[pool]; 4228 } 4229 4230 txbuff = &tx_pool->tx_buff[index]; 4231 num_packets++; 4232 num_entries += txbuff->num_entries; 4233 if (txbuff->skb) { 4234 total_bytes += txbuff->skb->len; 4235 if (next->tx_comp.rcs[i]) { 4236 dev_err(dev, "tx error %x\n", 4237 next->tx_comp.rcs[i]); 4238 dev_kfree_skb_irq(txbuff->skb); 4239 } else { 4240 dev_consume_skb_irq(txbuff->skb); 4241 } 4242 txbuff->skb = NULL; 4243 } else { 4244 netdev_warn(adapter->netdev, 4245 "TX completion received with NULL socket buffer\n"); 4246 } 4247 tx_pool->free_map[tx_pool->producer_index] = index; 4248 tx_pool->producer_index = 4249 (tx_pool->producer_index + 1) % 4250 tx_pool->num_buffers; 4251 } 4252 /* remove tx_comp scrq*/ 4253 next->tx_comp.first = 0; 4254 4255 4256 if (atomic_sub_return(num_entries, &scrq->used) <= 4257 (adapter->req_tx_entries_per_subcrq / 2) && 4258 __netif_subqueue_stopped(adapter->netdev, 4259 scrq->pool_index)) { 4260 rcu_read_lock(); 4261 if (adapter->tx_queues_active) { 4262 netif_wake_subqueue(adapter->netdev, 4263 scrq->pool_index); 4264 netdev_dbg(adapter->netdev, 4265 "Started queue %d\n", 4266 scrq->pool_index); 4267 } 4268 rcu_read_unlock(); 4269 } 4270 } 4271 4272 enable_scrq_irq(adapter, scrq); 4273 4274 if (pending_scrq(adapter, scrq)) { 4275 disable_scrq_irq(adapter, scrq); 4276 goto restart_loop; 4277 } 4278 4279 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4280 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4281 4282 return 0; 4283 } 4284 4285 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4286 { 4287 struct ibmvnic_sub_crq_queue *scrq = instance; 4288 struct ibmvnic_adapter *adapter = scrq->adapter; 4289 4290 disable_scrq_irq(adapter, scrq); 4291 ibmvnic_complete_tx(adapter, scrq); 4292 4293 return IRQ_HANDLED; 4294 } 4295 4296 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4297 { 4298 struct ibmvnic_sub_crq_queue *scrq = instance; 4299 struct ibmvnic_adapter *adapter = scrq->adapter; 4300 4301 /* When booting a kdump kernel we can hit pending interrupts 4302 * prior to completing driver initialization. 4303 */ 4304 if (unlikely(adapter->state != VNIC_OPEN)) 4305 return IRQ_NONE; 4306 4307 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4308 4309 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4310 disable_scrq_irq(adapter, scrq); 4311 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4312 } 4313 4314 return IRQ_HANDLED; 4315 } 4316 4317 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4318 { 4319 struct device *dev = &adapter->vdev->dev; 4320 struct ibmvnic_sub_crq_queue *scrq; 4321 int i = 0, j = 0; 4322 int rc = 0; 4323 4324 for (i = 0; i < adapter->req_tx_queues; i++) { 4325 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4326 i); 4327 scrq = adapter->tx_scrq[i]; 4328 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4329 4330 if (!scrq->irq) { 4331 rc = -EINVAL; 4332 dev_err(dev, "Error mapping irq\n"); 4333 goto req_tx_irq_failed; 4334 } 4335 4336 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4337 adapter->vdev->unit_address, i); 4338 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4339 0, scrq->name, scrq); 4340 4341 if (rc) { 4342 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4343 scrq->irq, rc); 4344 irq_dispose_mapping(scrq->irq); 4345 goto req_tx_irq_failed; 4346 } 4347 } 4348 4349 for (i = 0; i < adapter->req_rx_queues; i++) { 4350 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4351 i); 4352 scrq = adapter->rx_scrq[i]; 4353 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4354 if (!scrq->irq) { 4355 rc = -EINVAL; 4356 dev_err(dev, "Error mapping irq\n"); 4357 goto req_rx_irq_failed; 4358 } 4359 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4360 adapter->vdev->unit_address, i); 4361 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4362 0, scrq->name, scrq); 4363 if (rc) { 4364 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4365 scrq->irq, rc); 4366 irq_dispose_mapping(scrq->irq); 4367 goto req_rx_irq_failed; 4368 } 4369 } 4370 4371 cpus_read_lock(); 4372 ibmvnic_set_affinity(adapter); 4373 cpus_read_unlock(); 4374 4375 return rc; 4376 4377 req_rx_irq_failed: 4378 for (j = 0; j < i; j++) { 4379 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4380 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4381 } 4382 i = adapter->req_tx_queues; 4383 req_tx_irq_failed: 4384 for (j = 0; j < i; j++) { 4385 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4386 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4387 } 4388 release_sub_crqs(adapter, 1); 4389 return rc; 4390 } 4391 4392 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4393 { 4394 struct device *dev = &adapter->vdev->dev; 4395 struct ibmvnic_sub_crq_queue **allqueues; 4396 int registered_queues = 0; 4397 int total_queues; 4398 int more = 0; 4399 int i; 4400 4401 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4402 4403 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4404 if (!allqueues) 4405 return -ENOMEM; 4406 4407 for (i = 0; i < total_queues; i++) { 4408 allqueues[i] = init_sub_crq_queue(adapter); 4409 if (!allqueues[i]) { 4410 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4411 break; 4412 } 4413 registered_queues++; 4414 } 4415 4416 /* Make sure we were able to register the minimum number of queues */ 4417 if (registered_queues < 4418 adapter->min_tx_queues + adapter->min_rx_queues) { 4419 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4420 goto tx_failed; 4421 } 4422 4423 /* Distribute the failed allocated queues*/ 4424 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4425 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4426 switch (i % 3) { 4427 case 0: 4428 if (adapter->req_rx_queues > adapter->min_rx_queues) 4429 adapter->req_rx_queues--; 4430 else 4431 more++; 4432 break; 4433 case 1: 4434 if (adapter->req_tx_queues > adapter->min_tx_queues) 4435 adapter->req_tx_queues--; 4436 else 4437 more++; 4438 break; 4439 } 4440 } 4441 4442 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4443 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4444 if (!adapter->tx_scrq) 4445 goto tx_failed; 4446 4447 for (i = 0; i < adapter->req_tx_queues; i++) { 4448 adapter->tx_scrq[i] = allqueues[i]; 4449 adapter->tx_scrq[i]->pool_index = i; 4450 adapter->num_active_tx_scrqs++; 4451 } 4452 4453 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4454 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4455 if (!adapter->rx_scrq) 4456 goto rx_failed; 4457 4458 for (i = 0; i < adapter->req_rx_queues; i++) { 4459 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4460 adapter->rx_scrq[i]->scrq_num = i; 4461 adapter->num_active_rx_scrqs++; 4462 } 4463 4464 kfree(allqueues); 4465 return 0; 4466 4467 rx_failed: 4468 kfree(adapter->tx_scrq); 4469 adapter->tx_scrq = NULL; 4470 tx_failed: 4471 for (i = 0; i < registered_queues; i++) 4472 release_sub_crq_queue(adapter, allqueues[i], 1); 4473 kfree(allqueues); 4474 return -ENOMEM; 4475 } 4476 4477 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4478 { 4479 struct device *dev = &adapter->vdev->dev; 4480 union ibmvnic_crq crq; 4481 int max_entries; 4482 int cap_reqs; 4483 4484 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4485 * the PROMISC flag). Initialize this count upfront. When the tasklet 4486 * receives a response to all of these, it will send the next protocol 4487 * message (QUERY_IP_OFFLOAD). 4488 */ 4489 if (!(adapter->netdev->flags & IFF_PROMISC) || 4490 adapter->promisc_supported) 4491 cap_reqs = 7; 4492 else 4493 cap_reqs = 6; 4494 4495 if (!retry) { 4496 /* Sub-CRQ entries are 32 byte long */ 4497 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4498 4499 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4500 4501 if (adapter->min_tx_entries_per_subcrq > entries_page || 4502 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4503 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4504 return; 4505 } 4506 4507 if (adapter->desired.mtu) 4508 adapter->req_mtu = adapter->desired.mtu; 4509 else 4510 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4511 4512 if (!adapter->desired.tx_entries) 4513 adapter->desired.tx_entries = 4514 adapter->max_tx_entries_per_subcrq; 4515 if (!adapter->desired.rx_entries) 4516 adapter->desired.rx_entries = 4517 adapter->max_rx_add_entries_per_subcrq; 4518 4519 max_entries = IBMVNIC_LTB_SET_SIZE / 4520 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4521 4522 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4523 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4524 adapter->desired.tx_entries = max_entries; 4525 } 4526 4527 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4528 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4529 adapter->desired.rx_entries = max_entries; 4530 } 4531 4532 if (adapter->desired.tx_entries) 4533 adapter->req_tx_entries_per_subcrq = 4534 adapter->desired.tx_entries; 4535 else 4536 adapter->req_tx_entries_per_subcrq = 4537 adapter->max_tx_entries_per_subcrq; 4538 4539 if (adapter->desired.rx_entries) 4540 adapter->req_rx_add_entries_per_subcrq = 4541 adapter->desired.rx_entries; 4542 else 4543 adapter->req_rx_add_entries_per_subcrq = 4544 adapter->max_rx_add_entries_per_subcrq; 4545 4546 if (adapter->desired.tx_queues) 4547 adapter->req_tx_queues = 4548 adapter->desired.tx_queues; 4549 else 4550 adapter->req_tx_queues = 4551 adapter->opt_tx_comp_sub_queues; 4552 4553 if (adapter->desired.rx_queues) 4554 adapter->req_rx_queues = 4555 adapter->desired.rx_queues; 4556 else 4557 adapter->req_rx_queues = 4558 adapter->opt_rx_comp_queues; 4559 4560 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4561 } else { 4562 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4563 } 4564 memset(&crq, 0, sizeof(crq)); 4565 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4566 crq.request_capability.cmd = REQUEST_CAPABILITY; 4567 4568 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4569 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4570 cap_reqs--; 4571 ibmvnic_send_crq(adapter, &crq); 4572 4573 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4574 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4575 cap_reqs--; 4576 ibmvnic_send_crq(adapter, &crq); 4577 4578 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4579 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4580 cap_reqs--; 4581 ibmvnic_send_crq(adapter, &crq); 4582 4583 crq.request_capability.capability = 4584 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4585 crq.request_capability.number = 4586 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4587 cap_reqs--; 4588 ibmvnic_send_crq(adapter, &crq); 4589 4590 crq.request_capability.capability = 4591 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4592 crq.request_capability.number = 4593 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4594 cap_reqs--; 4595 ibmvnic_send_crq(adapter, &crq); 4596 4597 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4598 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4599 cap_reqs--; 4600 ibmvnic_send_crq(adapter, &crq); 4601 4602 if (adapter->netdev->flags & IFF_PROMISC) { 4603 if (adapter->promisc_supported) { 4604 crq.request_capability.capability = 4605 cpu_to_be16(PROMISC_REQUESTED); 4606 crq.request_capability.number = cpu_to_be64(1); 4607 cap_reqs--; 4608 ibmvnic_send_crq(adapter, &crq); 4609 } 4610 } else { 4611 crq.request_capability.capability = 4612 cpu_to_be16(PROMISC_REQUESTED); 4613 crq.request_capability.number = cpu_to_be64(0); 4614 cap_reqs--; 4615 ibmvnic_send_crq(adapter, &crq); 4616 } 4617 4618 /* Keep at end to catch any discrepancy between expected and actual 4619 * CRQs sent. 4620 */ 4621 WARN_ON(cap_reqs != 0); 4622 } 4623 4624 static int pending_scrq(struct ibmvnic_adapter *adapter, 4625 struct ibmvnic_sub_crq_queue *scrq) 4626 { 4627 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4628 int rc; 4629 4630 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4631 4632 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4633 * contents of the SCRQ descriptor 4634 */ 4635 dma_rmb(); 4636 4637 return rc; 4638 } 4639 4640 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4641 struct ibmvnic_sub_crq_queue *scrq) 4642 { 4643 union sub_crq *entry; 4644 unsigned long flags; 4645 4646 spin_lock_irqsave(&scrq->lock, flags); 4647 entry = &scrq->msgs[scrq->cur]; 4648 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4649 if (++scrq->cur == scrq->size) 4650 scrq->cur = 0; 4651 } else { 4652 entry = NULL; 4653 } 4654 spin_unlock_irqrestore(&scrq->lock, flags); 4655 4656 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4657 * contents of the SCRQ descriptor 4658 */ 4659 dma_rmb(); 4660 4661 return entry; 4662 } 4663 4664 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4665 { 4666 struct ibmvnic_crq_queue *queue = &adapter->crq; 4667 union ibmvnic_crq *crq; 4668 4669 crq = &queue->msgs[queue->cur]; 4670 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4671 if (++queue->cur == queue->size) 4672 queue->cur = 0; 4673 } else { 4674 crq = NULL; 4675 } 4676 4677 return crq; 4678 } 4679 4680 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4681 { 4682 switch (rc) { 4683 case H_PARAMETER: 4684 dev_warn_ratelimited(dev, 4685 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4686 func, rc); 4687 break; 4688 case H_CLOSED: 4689 dev_warn_ratelimited(dev, 4690 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4691 func, rc); 4692 break; 4693 default: 4694 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4695 break; 4696 } 4697 } 4698 4699 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4700 u64 remote_handle, u64 ioba, u64 num_entries) 4701 { 4702 unsigned int ua = adapter->vdev->unit_address; 4703 struct device *dev = &adapter->vdev->dev; 4704 int rc; 4705 4706 /* Make sure the hypervisor sees the complete request */ 4707 dma_wmb(); 4708 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4709 cpu_to_be64(remote_handle), 4710 ioba, num_entries); 4711 4712 if (rc) 4713 print_subcrq_error(dev, rc, __func__); 4714 4715 return rc; 4716 } 4717 4718 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4719 union ibmvnic_crq *crq) 4720 { 4721 unsigned int ua = adapter->vdev->unit_address; 4722 struct device *dev = &adapter->vdev->dev; 4723 u64 *u64_crq = (u64 *)crq; 4724 int rc; 4725 4726 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4727 (unsigned long)cpu_to_be64(u64_crq[0]), 4728 (unsigned long)cpu_to_be64(u64_crq[1])); 4729 4730 if (!adapter->crq.active && 4731 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4732 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4733 return -EINVAL; 4734 } 4735 4736 /* Make sure the hypervisor sees the complete request */ 4737 dma_wmb(); 4738 4739 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4740 cpu_to_be64(u64_crq[0]), 4741 cpu_to_be64(u64_crq[1])); 4742 4743 if (rc) { 4744 if (rc == H_CLOSED) { 4745 dev_warn(dev, "CRQ Queue closed\n"); 4746 /* do not reset, report the fail, wait for passive init from server */ 4747 } 4748 4749 dev_warn(dev, "Send error (rc=%d)\n", rc); 4750 } 4751 4752 return rc; 4753 } 4754 4755 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4756 { 4757 struct device *dev = &adapter->vdev->dev; 4758 union ibmvnic_crq crq; 4759 int retries = 100; 4760 int rc; 4761 4762 memset(&crq, 0, sizeof(crq)); 4763 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4764 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4765 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4766 4767 do { 4768 rc = ibmvnic_send_crq(adapter, &crq); 4769 if (rc != H_CLOSED) 4770 break; 4771 retries--; 4772 msleep(50); 4773 4774 } while (retries > 0); 4775 4776 if (rc) { 4777 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4778 return rc; 4779 } 4780 4781 return 0; 4782 } 4783 4784 struct vnic_login_client_data { 4785 u8 type; 4786 __be16 len; 4787 char name[]; 4788 } __packed; 4789 4790 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4791 { 4792 int len; 4793 4794 /* Calculate the amount of buffer space needed for the 4795 * vnic client data in the login buffer. There are four entries, 4796 * OS name, LPAR name, device name, and a null last entry. 4797 */ 4798 len = 4 * sizeof(struct vnic_login_client_data); 4799 len += 6; /* "Linux" plus NULL */ 4800 len += strlen(utsname()->nodename) + 1; 4801 len += strlen(adapter->netdev->name) + 1; 4802 4803 return len; 4804 } 4805 4806 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4807 struct vnic_login_client_data *vlcd) 4808 { 4809 const char *os_name = "Linux"; 4810 int len; 4811 4812 /* Type 1 - LPAR OS */ 4813 vlcd->type = 1; 4814 len = strlen(os_name) + 1; 4815 vlcd->len = cpu_to_be16(len); 4816 strscpy(vlcd->name, os_name, len); 4817 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4818 4819 /* Type 2 - LPAR name */ 4820 vlcd->type = 2; 4821 len = strlen(utsname()->nodename) + 1; 4822 vlcd->len = cpu_to_be16(len); 4823 strscpy(vlcd->name, utsname()->nodename, len); 4824 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4825 4826 /* Type 3 - device name */ 4827 vlcd->type = 3; 4828 len = strlen(adapter->netdev->name) + 1; 4829 vlcd->len = cpu_to_be16(len); 4830 strscpy(vlcd->name, adapter->netdev->name, len); 4831 } 4832 4833 static int send_login(struct ibmvnic_adapter *adapter) 4834 { 4835 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4836 struct ibmvnic_login_buffer *login_buffer; 4837 struct device *dev = &adapter->vdev->dev; 4838 struct vnic_login_client_data *vlcd; 4839 dma_addr_t rsp_buffer_token; 4840 dma_addr_t buffer_token; 4841 size_t rsp_buffer_size; 4842 union ibmvnic_crq crq; 4843 int client_data_len; 4844 size_t buffer_size; 4845 __be64 *tx_list_p; 4846 __be64 *rx_list_p; 4847 int rc; 4848 int i; 4849 4850 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4851 netdev_err(adapter->netdev, 4852 "RX or TX queues are not allocated, device login failed\n"); 4853 return -ENOMEM; 4854 } 4855 4856 release_login_buffer(adapter); 4857 release_login_rsp_buffer(adapter); 4858 4859 client_data_len = vnic_client_data_len(adapter); 4860 4861 buffer_size = 4862 sizeof(struct ibmvnic_login_buffer) + 4863 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4864 client_data_len; 4865 4866 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4867 if (!login_buffer) 4868 goto buf_alloc_failed; 4869 4870 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4871 DMA_TO_DEVICE); 4872 if (dma_mapping_error(dev, buffer_token)) { 4873 dev_err(dev, "Couldn't map login buffer\n"); 4874 goto buf_map_failed; 4875 } 4876 4877 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4878 sizeof(u64) * adapter->req_tx_queues + 4879 sizeof(u64) * adapter->req_rx_queues + 4880 sizeof(u64) * adapter->req_rx_queues + 4881 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4882 4883 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4884 if (!login_rsp_buffer) 4885 goto buf_rsp_alloc_failed; 4886 4887 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4888 rsp_buffer_size, DMA_FROM_DEVICE); 4889 if (dma_mapping_error(dev, rsp_buffer_token)) { 4890 dev_err(dev, "Couldn't map login rsp buffer\n"); 4891 goto buf_rsp_map_failed; 4892 } 4893 4894 adapter->login_buf = login_buffer; 4895 adapter->login_buf_token = buffer_token; 4896 adapter->login_buf_sz = buffer_size; 4897 adapter->login_rsp_buf = login_rsp_buffer; 4898 adapter->login_rsp_buf_token = rsp_buffer_token; 4899 adapter->login_rsp_buf_sz = rsp_buffer_size; 4900 4901 login_buffer->len = cpu_to_be32(buffer_size); 4902 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4903 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4904 login_buffer->off_txcomp_subcrqs = 4905 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4906 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4907 login_buffer->off_rxcomp_subcrqs = 4908 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4909 sizeof(u64) * adapter->req_tx_queues); 4910 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4911 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4912 4913 tx_list_p = (__be64 *)((char *)login_buffer + 4914 sizeof(struct ibmvnic_login_buffer)); 4915 rx_list_p = (__be64 *)((char *)login_buffer + 4916 sizeof(struct ibmvnic_login_buffer) + 4917 sizeof(u64) * adapter->req_tx_queues); 4918 4919 for (i = 0; i < adapter->req_tx_queues; i++) { 4920 if (adapter->tx_scrq[i]) { 4921 tx_list_p[i] = 4922 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4923 } 4924 } 4925 4926 for (i = 0; i < adapter->req_rx_queues; i++) { 4927 if (adapter->rx_scrq[i]) { 4928 rx_list_p[i] = 4929 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4930 } 4931 } 4932 4933 /* Insert vNIC login client data */ 4934 vlcd = (struct vnic_login_client_data *) 4935 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4936 login_buffer->client_data_offset = 4937 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4938 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4939 4940 vnic_add_client_data(adapter, vlcd); 4941 4942 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4943 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4944 netdev_dbg(adapter->netdev, "%016lx\n", 4945 ((unsigned long *)(adapter->login_buf))[i]); 4946 } 4947 4948 memset(&crq, 0, sizeof(crq)); 4949 crq.login.first = IBMVNIC_CRQ_CMD; 4950 crq.login.cmd = LOGIN; 4951 crq.login.ioba = cpu_to_be32(buffer_token); 4952 crq.login.len = cpu_to_be32(buffer_size); 4953 4954 adapter->login_pending = true; 4955 rc = ibmvnic_send_crq(adapter, &crq); 4956 if (rc) { 4957 adapter->login_pending = false; 4958 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4959 goto buf_send_failed; 4960 } 4961 4962 return 0; 4963 4964 buf_send_failed: 4965 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4966 DMA_FROM_DEVICE); 4967 buf_rsp_map_failed: 4968 kfree(login_rsp_buffer); 4969 adapter->login_rsp_buf = NULL; 4970 buf_rsp_alloc_failed: 4971 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4972 buf_map_failed: 4973 kfree(login_buffer); 4974 adapter->login_buf = NULL; 4975 buf_alloc_failed: 4976 return -ENOMEM; 4977 } 4978 4979 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4980 u32 len, u8 map_id) 4981 { 4982 union ibmvnic_crq crq; 4983 4984 memset(&crq, 0, sizeof(crq)); 4985 crq.request_map.first = IBMVNIC_CRQ_CMD; 4986 crq.request_map.cmd = REQUEST_MAP; 4987 crq.request_map.map_id = map_id; 4988 crq.request_map.ioba = cpu_to_be32(addr); 4989 crq.request_map.len = cpu_to_be32(len); 4990 return ibmvnic_send_crq(adapter, &crq); 4991 } 4992 4993 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4994 { 4995 union ibmvnic_crq crq; 4996 4997 memset(&crq, 0, sizeof(crq)); 4998 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4999 crq.request_unmap.cmd = REQUEST_UNMAP; 5000 crq.request_unmap.map_id = map_id; 5001 return ibmvnic_send_crq(adapter, &crq); 5002 } 5003 5004 static void send_query_map(struct ibmvnic_adapter *adapter) 5005 { 5006 union ibmvnic_crq crq; 5007 5008 memset(&crq, 0, sizeof(crq)); 5009 crq.query_map.first = IBMVNIC_CRQ_CMD; 5010 crq.query_map.cmd = QUERY_MAP; 5011 ibmvnic_send_crq(adapter, &crq); 5012 } 5013 5014 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 5015 static void send_query_cap(struct ibmvnic_adapter *adapter) 5016 { 5017 union ibmvnic_crq crq; 5018 int cap_reqs; 5019 5020 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 5021 * upfront. When the tasklet receives a response to all of these, it 5022 * can send out the next protocol messaage (REQUEST_CAPABILITY). 5023 */ 5024 cap_reqs = 25; 5025 5026 atomic_set(&adapter->running_cap_crqs, cap_reqs); 5027 5028 memset(&crq, 0, sizeof(crq)); 5029 crq.query_capability.first = IBMVNIC_CRQ_CMD; 5030 crq.query_capability.cmd = QUERY_CAPABILITY; 5031 5032 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 5033 ibmvnic_send_crq(adapter, &crq); 5034 cap_reqs--; 5035 5036 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 5037 ibmvnic_send_crq(adapter, &crq); 5038 cap_reqs--; 5039 5040 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 5041 ibmvnic_send_crq(adapter, &crq); 5042 cap_reqs--; 5043 5044 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 5045 ibmvnic_send_crq(adapter, &crq); 5046 cap_reqs--; 5047 5048 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 5049 ibmvnic_send_crq(adapter, &crq); 5050 cap_reqs--; 5051 5052 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 5053 ibmvnic_send_crq(adapter, &crq); 5054 cap_reqs--; 5055 5056 crq.query_capability.capability = 5057 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5058 ibmvnic_send_crq(adapter, &crq); 5059 cap_reqs--; 5060 5061 crq.query_capability.capability = 5062 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5063 ibmvnic_send_crq(adapter, &crq); 5064 cap_reqs--; 5065 5066 crq.query_capability.capability = 5067 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5068 ibmvnic_send_crq(adapter, &crq); 5069 cap_reqs--; 5070 5071 crq.query_capability.capability = 5072 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5073 ibmvnic_send_crq(adapter, &crq); 5074 cap_reqs--; 5075 5076 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5077 ibmvnic_send_crq(adapter, &crq); 5078 cap_reqs--; 5079 5080 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5081 ibmvnic_send_crq(adapter, &crq); 5082 cap_reqs--; 5083 5084 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5085 ibmvnic_send_crq(adapter, &crq); 5086 cap_reqs--; 5087 5088 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5089 ibmvnic_send_crq(adapter, &crq); 5090 cap_reqs--; 5091 5092 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5093 ibmvnic_send_crq(adapter, &crq); 5094 cap_reqs--; 5095 5096 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5097 ibmvnic_send_crq(adapter, &crq); 5098 cap_reqs--; 5099 5100 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5101 ibmvnic_send_crq(adapter, &crq); 5102 cap_reqs--; 5103 5104 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5105 ibmvnic_send_crq(adapter, &crq); 5106 cap_reqs--; 5107 5108 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5109 ibmvnic_send_crq(adapter, &crq); 5110 cap_reqs--; 5111 5112 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5113 ibmvnic_send_crq(adapter, &crq); 5114 cap_reqs--; 5115 5116 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5117 ibmvnic_send_crq(adapter, &crq); 5118 cap_reqs--; 5119 5120 crq.query_capability.capability = 5121 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5122 ibmvnic_send_crq(adapter, &crq); 5123 cap_reqs--; 5124 5125 crq.query_capability.capability = 5126 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5127 ibmvnic_send_crq(adapter, &crq); 5128 cap_reqs--; 5129 5130 crq.query_capability.capability = 5131 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5132 ibmvnic_send_crq(adapter, &crq); 5133 cap_reqs--; 5134 5135 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5136 5137 ibmvnic_send_crq(adapter, &crq); 5138 cap_reqs--; 5139 5140 /* Keep at end to catch any discrepancy between expected and actual 5141 * CRQs sent. 5142 */ 5143 WARN_ON(cap_reqs != 0); 5144 } 5145 5146 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5147 { 5148 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5149 struct device *dev = &adapter->vdev->dev; 5150 union ibmvnic_crq crq; 5151 5152 adapter->ip_offload_tok = 5153 dma_map_single(dev, 5154 &adapter->ip_offload_buf, 5155 buf_sz, 5156 DMA_FROM_DEVICE); 5157 5158 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5159 if (!firmware_has_feature(FW_FEATURE_CMO)) 5160 dev_err(dev, "Couldn't map offload buffer\n"); 5161 return; 5162 } 5163 5164 memset(&crq, 0, sizeof(crq)); 5165 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5166 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5167 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5168 crq.query_ip_offload.ioba = 5169 cpu_to_be32(adapter->ip_offload_tok); 5170 5171 ibmvnic_send_crq(adapter, &crq); 5172 } 5173 5174 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5175 { 5176 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5177 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5178 struct device *dev = &adapter->vdev->dev; 5179 netdev_features_t old_hw_features = 0; 5180 union ibmvnic_crq crq; 5181 5182 adapter->ip_offload_ctrl_tok = 5183 dma_map_single(dev, 5184 ctrl_buf, 5185 sizeof(adapter->ip_offload_ctrl), 5186 DMA_TO_DEVICE); 5187 5188 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5189 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5190 return; 5191 } 5192 5193 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5194 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5195 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5196 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5197 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5198 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5199 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5200 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5201 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5202 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5203 5204 /* large_rx disabled for now, additional features needed */ 5205 ctrl_buf->large_rx_ipv4 = 0; 5206 ctrl_buf->large_rx_ipv6 = 0; 5207 5208 if (adapter->state != VNIC_PROBING) { 5209 old_hw_features = adapter->netdev->hw_features; 5210 adapter->netdev->hw_features = 0; 5211 } 5212 5213 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5214 5215 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5216 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5217 5218 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5219 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5220 5221 if ((adapter->netdev->features & 5222 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5223 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5224 5225 if (buf->large_tx_ipv4) 5226 adapter->netdev->hw_features |= NETIF_F_TSO; 5227 if (buf->large_tx_ipv6) 5228 adapter->netdev->hw_features |= NETIF_F_TSO6; 5229 5230 if (adapter->state == VNIC_PROBING) { 5231 adapter->netdev->features |= adapter->netdev->hw_features; 5232 } else if (old_hw_features != adapter->netdev->hw_features) { 5233 netdev_features_t tmp = 0; 5234 5235 /* disable features no longer supported */ 5236 adapter->netdev->features &= adapter->netdev->hw_features; 5237 /* turn on features now supported if previously enabled */ 5238 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5239 adapter->netdev->hw_features; 5240 adapter->netdev->features |= 5241 tmp & adapter->netdev->wanted_features; 5242 } 5243 5244 memset(&crq, 0, sizeof(crq)); 5245 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5246 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5247 crq.control_ip_offload.len = 5248 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5249 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5250 ibmvnic_send_crq(adapter, &crq); 5251 } 5252 5253 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5254 struct ibmvnic_adapter *adapter) 5255 { 5256 struct device *dev = &adapter->vdev->dev; 5257 5258 if (crq->get_vpd_size_rsp.rc.code) { 5259 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5260 crq->get_vpd_size_rsp.rc.code); 5261 complete(&adapter->fw_done); 5262 return; 5263 } 5264 5265 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5266 complete(&adapter->fw_done); 5267 } 5268 5269 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5270 struct ibmvnic_adapter *adapter) 5271 { 5272 struct device *dev = &adapter->vdev->dev; 5273 unsigned char *substr = NULL; 5274 u8 fw_level_len = 0; 5275 5276 memset(adapter->fw_version, 0, 32); 5277 5278 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5279 DMA_FROM_DEVICE); 5280 5281 if (crq->get_vpd_rsp.rc.code) { 5282 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5283 crq->get_vpd_rsp.rc.code); 5284 goto complete; 5285 } 5286 5287 /* get the position of the firmware version info 5288 * located after the ASCII 'RM' substring in the buffer 5289 */ 5290 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5291 if (!substr) { 5292 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5293 goto complete; 5294 } 5295 5296 /* get length of firmware level ASCII substring */ 5297 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5298 fw_level_len = *(substr + 2); 5299 } else { 5300 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5301 goto complete; 5302 } 5303 5304 /* copy firmware version string from vpd into adapter */ 5305 if ((substr + 3 + fw_level_len) < 5306 (adapter->vpd->buff + adapter->vpd->len)) { 5307 strscpy(adapter->fw_version, substr + 3, 5308 sizeof(adapter->fw_version)); 5309 } else { 5310 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5311 } 5312 5313 complete: 5314 if (adapter->fw_version[0] == '\0') 5315 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5316 complete(&adapter->fw_done); 5317 } 5318 5319 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5320 { 5321 struct device *dev = &adapter->vdev->dev; 5322 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5323 int i; 5324 5325 dma_unmap_single(dev, adapter->ip_offload_tok, 5326 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5327 5328 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5329 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5330 netdev_dbg(adapter->netdev, "%016lx\n", 5331 ((unsigned long *)(buf))[i]); 5332 5333 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5334 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5335 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5336 buf->tcp_ipv4_chksum); 5337 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5338 buf->tcp_ipv6_chksum); 5339 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5340 buf->udp_ipv4_chksum); 5341 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5342 buf->udp_ipv6_chksum); 5343 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5344 buf->large_tx_ipv4); 5345 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5346 buf->large_tx_ipv6); 5347 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5348 buf->large_rx_ipv4); 5349 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5350 buf->large_rx_ipv6); 5351 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5352 buf->max_ipv4_header_size); 5353 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5354 buf->max_ipv6_header_size); 5355 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5356 buf->max_tcp_header_size); 5357 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5358 buf->max_udp_header_size); 5359 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5360 buf->max_large_tx_size); 5361 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5362 buf->max_large_rx_size); 5363 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5364 buf->ipv6_extension_header); 5365 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5366 buf->tcp_pseudosum_req); 5367 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5368 buf->num_ipv6_ext_headers); 5369 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5370 buf->off_ipv6_ext_headers); 5371 5372 send_control_ip_offload(adapter); 5373 } 5374 5375 static const char *ibmvnic_fw_err_cause(u16 cause) 5376 { 5377 switch (cause) { 5378 case ADAPTER_PROBLEM: 5379 return "adapter problem"; 5380 case BUS_PROBLEM: 5381 return "bus problem"; 5382 case FW_PROBLEM: 5383 return "firmware problem"; 5384 case DD_PROBLEM: 5385 return "device driver problem"; 5386 case EEH_RECOVERY: 5387 return "EEH recovery"; 5388 case FW_UPDATED: 5389 return "firmware updated"; 5390 case LOW_MEMORY: 5391 return "low Memory"; 5392 default: 5393 return "unknown"; 5394 } 5395 } 5396 5397 static void handle_error_indication(union ibmvnic_crq *crq, 5398 struct ibmvnic_adapter *adapter) 5399 { 5400 struct device *dev = &adapter->vdev->dev; 5401 u16 cause; 5402 5403 cause = be16_to_cpu(crq->error_indication.error_cause); 5404 5405 dev_warn_ratelimited(dev, 5406 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5407 crq->error_indication.flags 5408 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5409 ibmvnic_fw_err_cause(cause)); 5410 5411 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5412 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5413 else 5414 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5415 } 5416 5417 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5418 struct ibmvnic_adapter *adapter) 5419 { 5420 struct net_device *netdev = adapter->netdev; 5421 struct device *dev = &adapter->vdev->dev; 5422 long rc; 5423 5424 rc = crq->change_mac_addr_rsp.rc.code; 5425 if (rc) { 5426 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5427 goto out; 5428 } 5429 /* crq->change_mac_addr.mac_addr is the requested one 5430 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5431 */ 5432 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5433 ether_addr_copy(adapter->mac_addr, 5434 &crq->change_mac_addr_rsp.mac_addr[0]); 5435 out: 5436 complete(&adapter->fw_done); 5437 return rc; 5438 } 5439 5440 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5441 struct ibmvnic_adapter *adapter) 5442 { 5443 struct device *dev = &adapter->vdev->dev; 5444 u64 *req_value; 5445 char *name; 5446 5447 atomic_dec(&adapter->running_cap_crqs); 5448 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5449 atomic_read(&adapter->running_cap_crqs)); 5450 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5451 case REQ_TX_QUEUES: 5452 req_value = &adapter->req_tx_queues; 5453 name = "tx"; 5454 break; 5455 case REQ_RX_QUEUES: 5456 req_value = &adapter->req_rx_queues; 5457 name = "rx"; 5458 break; 5459 case REQ_RX_ADD_QUEUES: 5460 req_value = &adapter->req_rx_add_queues; 5461 name = "rx_add"; 5462 break; 5463 case REQ_TX_ENTRIES_PER_SUBCRQ: 5464 req_value = &adapter->req_tx_entries_per_subcrq; 5465 name = "tx_entries_per_subcrq"; 5466 break; 5467 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5468 req_value = &adapter->req_rx_add_entries_per_subcrq; 5469 name = "rx_add_entries_per_subcrq"; 5470 break; 5471 case REQ_MTU: 5472 req_value = &adapter->req_mtu; 5473 name = "mtu"; 5474 break; 5475 case PROMISC_REQUESTED: 5476 req_value = &adapter->promisc; 5477 name = "promisc"; 5478 break; 5479 default: 5480 dev_err(dev, "Got invalid cap request rsp %d\n", 5481 crq->request_capability.capability); 5482 return; 5483 } 5484 5485 switch (crq->request_capability_rsp.rc.code) { 5486 case SUCCESS: 5487 break; 5488 case PARTIALSUCCESS: 5489 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5490 *req_value, 5491 (long)be64_to_cpu(crq->request_capability_rsp.number), 5492 name); 5493 5494 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5495 REQ_MTU) { 5496 pr_err("mtu of %llu is not supported. Reverting.\n", 5497 *req_value); 5498 *req_value = adapter->fallback.mtu; 5499 } else { 5500 *req_value = 5501 be64_to_cpu(crq->request_capability_rsp.number); 5502 } 5503 5504 send_request_cap(adapter, 1); 5505 return; 5506 default: 5507 dev_err(dev, "Error %d in request cap rsp\n", 5508 crq->request_capability_rsp.rc.code); 5509 return; 5510 } 5511 5512 /* Done receiving requested capabilities, query IP offload support */ 5513 if (atomic_read(&adapter->running_cap_crqs) == 0) 5514 send_query_ip_offload(adapter); 5515 } 5516 5517 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5518 struct ibmvnic_adapter *adapter) 5519 { 5520 struct device *dev = &adapter->vdev->dev; 5521 struct net_device *netdev = adapter->netdev; 5522 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5523 struct ibmvnic_login_buffer *login = adapter->login_buf; 5524 u64 *tx_handle_array; 5525 u64 *rx_handle_array; 5526 int num_tx_pools; 5527 int num_rx_pools; 5528 u64 *size_array; 5529 u32 rsp_len; 5530 int i; 5531 5532 /* CHECK: Test/set of login_pending does not need to be atomic 5533 * because only ibmvnic_tasklet tests/clears this. 5534 */ 5535 if (!adapter->login_pending) { 5536 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5537 return 0; 5538 } 5539 adapter->login_pending = false; 5540 5541 /* If the number of queues requested can't be allocated by the 5542 * server, the login response will return with code 1. We will need 5543 * to resend the login buffer with fewer queues requested. 5544 */ 5545 if (login_rsp_crq->generic.rc.code) { 5546 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5547 complete(&adapter->init_done); 5548 return 0; 5549 } 5550 5551 if (adapter->failover_pending) { 5552 adapter->init_done_rc = -EAGAIN; 5553 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5554 complete(&adapter->init_done); 5555 /* login response buffer will be released on reset */ 5556 return 0; 5557 } 5558 5559 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5560 5561 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5562 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5563 netdev_dbg(adapter->netdev, "%016lx\n", 5564 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5565 } 5566 5567 /* Sanity checks */ 5568 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5569 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5570 adapter->req_rx_add_queues != 5571 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5572 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5573 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5574 return -EIO; 5575 } 5576 5577 rsp_len = be32_to_cpu(login_rsp->len); 5578 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5579 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5580 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5581 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5582 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5583 /* This can happen if a login request times out and there are 5584 * 2 outstanding login requests sent, the LOGIN_RSP crq 5585 * could have been for the older login request. So we are 5586 * parsing the newer response buffer which may be incomplete 5587 */ 5588 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5589 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5590 return -EIO; 5591 } 5592 5593 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5594 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5595 /* variable buffer sizes are not supported, so just read the 5596 * first entry. 5597 */ 5598 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5599 5600 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5601 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5602 5603 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5604 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5605 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5606 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5607 5608 for (i = 0; i < num_tx_pools; i++) 5609 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5610 5611 for (i = 0; i < num_rx_pools; i++) 5612 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5613 5614 adapter->num_active_tx_scrqs = num_tx_pools; 5615 adapter->num_active_rx_scrqs = num_rx_pools; 5616 release_login_rsp_buffer(adapter); 5617 release_login_buffer(adapter); 5618 complete(&adapter->init_done); 5619 5620 return 0; 5621 } 5622 5623 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5624 struct ibmvnic_adapter *adapter) 5625 { 5626 struct device *dev = &adapter->vdev->dev; 5627 long rc; 5628 5629 rc = crq->request_unmap_rsp.rc.code; 5630 if (rc) 5631 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5632 } 5633 5634 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5635 struct ibmvnic_adapter *adapter) 5636 { 5637 struct net_device *netdev = adapter->netdev; 5638 struct device *dev = &adapter->vdev->dev; 5639 long rc; 5640 5641 rc = crq->query_map_rsp.rc.code; 5642 if (rc) { 5643 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5644 return; 5645 } 5646 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5647 crq->query_map_rsp.page_size, 5648 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5649 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5650 } 5651 5652 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5653 struct ibmvnic_adapter *adapter) 5654 { 5655 struct net_device *netdev = adapter->netdev; 5656 struct device *dev = &adapter->vdev->dev; 5657 long rc; 5658 5659 atomic_dec(&adapter->running_cap_crqs); 5660 netdev_dbg(netdev, "Outstanding queries: %d\n", 5661 atomic_read(&adapter->running_cap_crqs)); 5662 rc = crq->query_capability.rc.code; 5663 if (rc) { 5664 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5665 goto out; 5666 } 5667 5668 switch (be16_to_cpu(crq->query_capability.capability)) { 5669 case MIN_TX_QUEUES: 5670 adapter->min_tx_queues = 5671 be64_to_cpu(crq->query_capability.number); 5672 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5673 adapter->min_tx_queues); 5674 break; 5675 case MIN_RX_QUEUES: 5676 adapter->min_rx_queues = 5677 be64_to_cpu(crq->query_capability.number); 5678 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5679 adapter->min_rx_queues); 5680 break; 5681 case MIN_RX_ADD_QUEUES: 5682 adapter->min_rx_add_queues = 5683 be64_to_cpu(crq->query_capability.number); 5684 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5685 adapter->min_rx_add_queues); 5686 break; 5687 case MAX_TX_QUEUES: 5688 adapter->max_tx_queues = 5689 be64_to_cpu(crq->query_capability.number); 5690 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5691 adapter->max_tx_queues); 5692 break; 5693 case MAX_RX_QUEUES: 5694 adapter->max_rx_queues = 5695 be64_to_cpu(crq->query_capability.number); 5696 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5697 adapter->max_rx_queues); 5698 break; 5699 case MAX_RX_ADD_QUEUES: 5700 adapter->max_rx_add_queues = 5701 be64_to_cpu(crq->query_capability.number); 5702 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5703 adapter->max_rx_add_queues); 5704 break; 5705 case MIN_TX_ENTRIES_PER_SUBCRQ: 5706 adapter->min_tx_entries_per_subcrq = 5707 be64_to_cpu(crq->query_capability.number); 5708 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5709 adapter->min_tx_entries_per_subcrq); 5710 break; 5711 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5712 adapter->min_rx_add_entries_per_subcrq = 5713 be64_to_cpu(crq->query_capability.number); 5714 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5715 adapter->min_rx_add_entries_per_subcrq); 5716 break; 5717 case MAX_TX_ENTRIES_PER_SUBCRQ: 5718 adapter->max_tx_entries_per_subcrq = 5719 be64_to_cpu(crq->query_capability.number); 5720 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5721 adapter->max_tx_entries_per_subcrq); 5722 break; 5723 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5724 adapter->max_rx_add_entries_per_subcrq = 5725 be64_to_cpu(crq->query_capability.number); 5726 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5727 adapter->max_rx_add_entries_per_subcrq); 5728 break; 5729 case TCP_IP_OFFLOAD: 5730 adapter->tcp_ip_offload = 5731 be64_to_cpu(crq->query_capability.number); 5732 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5733 adapter->tcp_ip_offload); 5734 break; 5735 case PROMISC_SUPPORTED: 5736 adapter->promisc_supported = 5737 be64_to_cpu(crq->query_capability.number); 5738 netdev_dbg(netdev, "promisc_supported = %lld\n", 5739 adapter->promisc_supported); 5740 break; 5741 case MIN_MTU: 5742 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5743 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5744 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5745 break; 5746 case MAX_MTU: 5747 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5748 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5749 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5750 break; 5751 case MAX_MULTICAST_FILTERS: 5752 adapter->max_multicast_filters = 5753 be64_to_cpu(crq->query_capability.number); 5754 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5755 adapter->max_multicast_filters); 5756 break; 5757 case VLAN_HEADER_INSERTION: 5758 adapter->vlan_header_insertion = 5759 be64_to_cpu(crq->query_capability.number); 5760 if (adapter->vlan_header_insertion) 5761 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5762 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5763 adapter->vlan_header_insertion); 5764 break; 5765 case RX_VLAN_HEADER_INSERTION: 5766 adapter->rx_vlan_header_insertion = 5767 be64_to_cpu(crq->query_capability.number); 5768 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5769 adapter->rx_vlan_header_insertion); 5770 break; 5771 case MAX_TX_SG_ENTRIES: 5772 adapter->max_tx_sg_entries = 5773 be64_to_cpu(crq->query_capability.number); 5774 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5775 adapter->max_tx_sg_entries); 5776 break; 5777 case RX_SG_SUPPORTED: 5778 adapter->rx_sg_supported = 5779 be64_to_cpu(crq->query_capability.number); 5780 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5781 adapter->rx_sg_supported); 5782 break; 5783 case OPT_TX_COMP_SUB_QUEUES: 5784 adapter->opt_tx_comp_sub_queues = 5785 be64_to_cpu(crq->query_capability.number); 5786 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5787 adapter->opt_tx_comp_sub_queues); 5788 break; 5789 case OPT_RX_COMP_QUEUES: 5790 adapter->opt_rx_comp_queues = 5791 be64_to_cpu(crq->query_capability.number); 5792 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5793 adapter->opt_rx_comp_queues); 5794 break; 5795 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5796 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5797 be64_to_cpu(crq->query_capability.number); 5798 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5799 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5800 break; 5801 case OPT_TX_ENTRIES_PER_SUBCRQ: 5802 adapter->opt_tx_entries_per_subcrq = 5803 be64_to_cpu(crq->query_capability.number); 5804 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5805 adapter->opt_tx_entries_per_subcrq); 5806 break; 5807 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5808 adapter->opt_rxba_entries_per_subcrq = 5809 be64_to_cpu(crq->query_capability.number); 5810 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5811 adapter->opt_rxba_entries_per_subcrq); 5812 break; 5813 case TX_RX_DESC_REQ: 5814 adapter->tx_rx_desc_req = crq->query_capability.number; 5815 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5816 adapter->tx_rx_desc_req); 5817 break; 5818 5819 default: 5820 netdev_err(netdev, "Got invalid cap rsp %d\n", 5821 crq->query_capability.capability); 5822 } 5823 5824 out: 5825 if (atomic_read(&adapter->running_cap_crqs) == 0) 5826 send_request_cap(adapter, 0); 5827 } 5828 5829 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5830 { 5831 union ibmvnic_crq crq; 5832 int rc; 5833 5834 memset(&crq, 0, sizeof(crq)); 5835 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5836 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5837 5838 mutex_lock(&adapter->fw_lock); 5839 adapter->fw_done_rc = 0; 5840 reinit_completion(&adapter->fw_done); 5841 5842 rc = ibmvnic_send_crq(adapter, &crq); 5843 if (rc) { 5844 mutex_unlock(&adapter->fw_lock); 5845 return rc; 5846 } 5847 5848 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5849 if (rc) { 5850 mutex_unlock(&adapter->fw_lock); 5851 return rc; 5852 } 5853 5854 mutex_unlock(&adapter->fw_lock); 5855 return adapter->fw_done_rc ? -EIO : 0; 5856 } 5857 5858 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5859 struct ibmvnic_adapter *adapter) 5860 { 5861 struct net_device *netdev = adapter->netdev; 5862 int rc; 5863 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5864 5865 rc = crq->query_phys_parms_rsp.rc.code; 5866 if (rc) { 5867 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5868 return rc; 5869 } 5870 switch (rspeed) { 5871 case IBMVNIC_10MBPS: 5872 adapter->speed = SPEED_10; 5873 break; 5874 case IBMVNIC_100MBPS: 5875 adapter->speed = SPEED_100; 5876 break; 5877 case IBMVNIC_1GBPS: 5878 adapter->speed = SPEED_1000; 5879 break; 5880 case IBMVNIC_10GBPS: 5881 adapter->speed = SPEED_10000; 5882 break; 5883 case IBMVNIC_25GBPS: 5884 adapter->speed = SPEED_25000; 5885 break; 5886 case IBMVNIC_40GBPS: 5887 adapter->speed = SPEED_40000; 5888 break; 5889 case IBMVNIC_50GBPS: 5890 adapter->speed = SPEED_50000; 5891 break; 5892 case IBMVNIC_100GBPS: 5893 adapter->speed = SPEED_100000; 5894 break; 5895 case IBMVNIC_200GBPS: 5896 adapter->speed = SPEED_200000; 5897 break; 5898 default: 5899 if (netif_carrier_ok(netdev)) 5900 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5901 adapter->speed = SPEED_UNKNOWN; 5902 } 5903 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5904 adapter->duplex = DUPLEX_FULL; 5905 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5906 adapter->duplex = DUPLEX_HALF; 5907 else 5908 adapter->duplex = DUPLEX_UNKNOWN; 5909 5910 return rc; 5911 } 5912 5913 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5914 struct ibmvnic_adapter *adapter) 5915 { 5916 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5917 struct net_device *netdev = adapter->netdev; 5918 struct device *dev = &adapter->vdev->dev; 5919 u64 *u64_crq = (u64 *)crq; 5920 long rc; 5921 5922 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5923 (unsigned long)cpu_to_be64(u64_crq[0]), 5924 (unsigned long)cpu_to_be64(u64_crq[1])); 5925 switch (gen_crq->first) { 5926 case IBMVNIC_CRQ_INIT_RSP: 5927 switch (gen_crq->cmd) { 5928 case IBMVNIC_CRQ_INIT: 5929 dev_info(dev, "Partner initialized\n"); 5930 adapter->from_passive_init = true; 5931 /* Discard any stale login responses from prev reset. 5932 * CHECK: should we clear even on INIT_COMPLETE? 5933 */ 5934 adapter->login_pending = false; 5935 5936 if (adapter->state == VNIC_DOWN) 5937 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5938 else 5939 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5940 5941 if (rc && rc != -EBUSY) { 5942 /* We were unable to schedule the failover 5943 * reset either because the adapter was still 5944 * probing (eg: during kexec) or we could not 5945 * allocate memory. Clear the failover_pending 5946 * flag since no one else will. We ignore 5947 * EBUSY because it means either FAILOVER reset 5948 * is already scheduled or the adapter is 5949 * being removed. 5950 */ 5951 netdev_err(netdev, 5952 "Error %ld scheduling failover reset\n", 5953 rc); 5954 adapter->failover_pending = false; 5955 } 5956 5957 if (!completion_done(&adapter->init_done)) { 5958 if (!adapter->init_done_rc) 5959 adapter->init_done_rc = -EAGAIN; 5960 complete(&adapter->init_done); 5961 } 5962 5963 break; 5964 case IBMVNIC_CRQ_INIT_COMPLETE: 5965 dev_info(dev, "Partner initialization complete\n"); 5966 adapter->crq.active = true; 5967 send_version_xchg(adapter); 5968 break; 5969 default: 5970 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5971 } 5972 return; 5973 case IBMVNIC_CRQ_XPORT_EVENT: 5974 netif_carrier_off(netdev); 5975 adapter->crq.active = false; 5976 /* terminate any thread waiting for a response 5977 * from the device 5978 */ 5979 if (!completion_done(&adapter->fw_done)) { 5980 adapter->fw_done_rc = -EIO; 5981 complete(&adapter->fw_done); 5982 } 5983 5984 /* if we got here during crq-init, retry crq-init */ 5985 if (!completion_done(&adapter->init_done)) { 5986 adapter->init_done_rc = -EAGAIN; 5987 complete(&adapter->init_done); 5988 } 5989 5990 if (!completion_done(&adapter->stats_done)) 5991 complete(&adapter->stats_done); 5992 if (test_bit(0, &adapter->resetting)) 5993 adapter->force_reset_recovery = true; 5994 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5995 dev_info(dev, "Migrated, re-enabling adapter\n"); 5996 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5997 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5998 dev_info(dev, "Backing device failover detected\n"); 5999 adapter->failover_pending = true; 6000 } else { 6001 /* The adapter lost the connection */ 6002 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 6003 gen_crq->cmd); 6004 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 6005 } 6006 return; 6007 case IBMVNIC_CRQ_CMD_RSP: 6008 break; 6009 default: 6010 dev_err(dev, "Got an invalid msg type 0x%02x\n", 6011 gen_crq->first); 6012 return; 6013 } 6014 6015 switch (gen_crq->cmd) { 6016 case VERSION_EXCHANGE_RSP: 6017 rc = crq->version_exchange_rsp.rc.code; 6018 if (rc) { 6019 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 6020 break; 6021 } 6022 ibmvnic_version = 6023 be16_to_cpu(crq->version_exchange_rsp.version); 6024 dev_info(dev, "Partner protocol version is %d\n", 6025 ibmvnic_version); 6026 send_query_cap(adapter); 6027 break; 6028 case QUERY_CAPABILITY_RSP: 6029 handle_query_cap_rsp(crq, adapter); 6030 break; 6031 case QUERY_MAP_RSP: 6032 handle_query_map_rsp(crq, adapter); 6033 break; 6034 case REQUEST_MAP_RSP: 6035 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 6036 complete(&adapter->fw_done); 6037 break; 6038 case REQUEST_UNMAP_RSP: 6039 handle_request_unmap_rsp(crq, adapter); 6040 break; 6041 case REQUEST_CAPABILITY_RSP: 6042 handle_request_cap_rsp(crq, adapter); 6043 break; 6044 case LOGIN_RSP: 6045 netdev_dbg(netdev, "Got Login Response\n"); 6046 handle_login_rsp(crq, adapter); 6047 break; 6048 case LOGICAL_LINK_STATE_RSP: 6049 netdev_dbg(netdev, 6050 "Got Logical Link State Response, state: %d rc: %d\n", 6051 crq->logical_link_state_rsp.link_state, 6052 crq->logical_link_state_rsp.rc.code); 6053 adapter->logical_link_state = 6054 crq->logical_link_state_rsp.link_state; 6055 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 6056 complete(&adapter->init_done); 6057 break; 6058 case LINK_STATE_INDICATION: 6059 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6060 adapter->phys_link_state = 6061 crq->link_state_indication.phys_link_state; 6062 adapter->logical_link_state = 6063 crq->link_state_indication.logical_link_state; 6064 if (adapter->phys_link_state && adapter->logical_link_state) 6065 netif_carrier_on(netdev); 6066 else 6067 netif_carrier_off(netdev); 6068 break; 6069 case CHANGE_MAC_ADDR_RSP: 6070 netdev_dbg(netdev, "Got MAC address change Response\n"); 6071 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6072 break; 6073 case ERROR_INDICATION: 6074 netdev_dbg(netdev, "Got Error Indication\n"); 6075 handle_error_indication(crq, adapter); 6076 break; 6077 case REQUEST_STATISTICS_RSP: 6078 netdev_dbg(netdev, "Got Statistics Response\n"); 6079 complete(&adapter->stats_done); 6080 break; 6081 case QUERY_IP_OFFLOAD_RSP: 6082 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6083 handle_query_ip_offload_rsp(adapter); 6084 break; 6085 case MULTICAST_CTRL_RSP: 6086 netdev_dbg(netdev, "Got multicast control Response\n"); 6087 break; 6088 case CONTROL_IP_OFFLOAD_RSP: 6089 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6090 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6091 sizeof(adapter->ip_offload_ctrl), 6092 DMA_TO_DEVICE); 6093 complete(&adapter->init_done); 6094 break; 6095 case COLLECT_FW_TRACE_RSP: 6096 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6097 complete(&adapter->fw_done); 6098 break; 6099 case GET_VPD_SIZE_RSP: 6100 handle_vpd_size_rsp(crq, adapter); 6101 break; 6102 case GET_VPD_RSP: 6103 handle_vpd_rsp(crq, adapter); 6104 break; 6105 case QUERY_PHYS_PARMS_RSP: 6106 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6107 complete(&adapter->fw_done); 6108 break; 6109 default: 6110 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6111 gen_crq->cmd); 6112 } 6113 } 6114 6115 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6116 { 6117 struct ibmvnic_adapter *adapter = instance; 6118 6119 tasklet_schedule(&adapter->tasklet); 6120 return IRQ_HANDLED; 6121 } 6122 6123 static void ibmvnic_tasklet(struct tasklet_struct *t) 6124 { 6125 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6126 struct ibmvnic_crq_queue *queue = &adapter->crq; 6127 union ibmvnic_crq *crq; 6128 unsigned long flags; 6129 6130 spin_lock_irqsave(&queue->lock, flags); 6131 6132 /* Pull all the valid messages off the CRQ */ 6133 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6134 /* This barrier makes sure ibmvnic_next_crq()'s 6135 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6136 * before ibmvnic_handle_crq()'s 6137 * switch(gen_crq->first) and switch(gen_crq->cmd). 6138 */ 6139 dma_rmb(); 6140 ibmvnic_handle_crq(crq, adapter); 6141 crq->generic.first = 0; 6142 } 6143 6144 spin_unlock_irqrestore(&queue->lock, flags); 6145 } 6146 6147 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6148 { 6149 struct vio_dev *vdev = adapter->vdev; 6150 int rc; 6151 6152 do { 6153 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6154 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6155 6156 if (rc) 6157 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6158 6159 return rc; 6160 } 6161 6162 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6163 { 6164 struct ibmvnic_crq_queue *crq = &adapter->crq; 6165 struct device *dev = &adapter->vdev->dev; 6166 struct vio_dev *vdev = adapter->vdev; 6167 int rc; 6168 6169 /* Close the CRQ */ 6170 do { 6171 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6172 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6173 6174 /* Clean out the queue */ 6175 if (!crq->msgs) 6176 return -EINVAL; 6177 6178 memset(crq->msgs, 0, PAGE_SIZE); 6179 crq->cur = 0; 6180 crq->active = false; 6181 6182 /* And re-open it again */ 6183 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6184 crq->msg_token, PAGE_SIZE); 6185 6186 if (rc == H_CLOSED) 6187 /* Adapter is good, but other end is not ready */ 6188 dev_warn(dev, "Partner adapter not ready\n"); 6189 else if (rc != 0) 6190 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6191 6192 return rc; 6193 } 6194 6195 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6196 { 6197 struct ibmvnic_crq_queue *crq = &adapter->crq; 6198 struct vio_dev *vdev = adapter->vdev; 6199 long rc; 6200 6201 if (!crq->msgs) 6202 return; 6203 6204 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6205 free_irq(vdev->irq, adapter); 6206 tasklet_kill(&adapter->tasklet); 6207 do { 6208 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6209 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6210 6211 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6212 DMA_BIDIRECTIONAL); 6213 free_page((unsigned long)crq->msgs); 6214 crq->msgs = NULL; 6215 crq->active = false; 6216 } 6217 6218 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6219 { 6220 struct ibmvnic_crq_queue *crq = &adapter->crq; 6221 struct device *dev = &adapter->vdev->dev; 6222 struct vio_dev *vdev = adapter->vdev; 6223 int rc, retrc = -ENOMEM; 6224 6225 if (crq->msgs) 6226 return 0; 6227 6228 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6229 /* Should we allocate more than one page? */ 6230 6231 if (!crq->msgs) 6232 return -ENOMEM; 6233 6234 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6235 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6236 DMA_BIDIRECTIONAL); 6237 if (dma_mapping_error(dev, crq->msg_token)) 6238 goto map_failed; 6239 6240 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6241 crq->msg_token, PAGE_SIZE); 6242 6243 if (rc == H_RESOURCE) 6244 /* maybe kexecing and resource is busy. try a reset */ 6245 rc = ibmvnic_reset_crq(adapter); 6246 retrc = rc; 6247 6248 if (rc == H_CLOSED) { 6249 dev_warn(dev, "Partner adapter not ready\n"); 6250 } else if (rc) { 6251 dev_warn(dev, "Error %d opening adapter\n", rc); 6252 goto reg_crq_failed; 6253 } 6254 6255 retrc = 0; 6256 6257 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6258 6259 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6260 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6261 adapter->vdev->unit_address); 6262 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6263 if (rc) { 6264 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6265 vdev->irq, rc); 6266 goto req_irq_failed; 6267 } 6268 6269 rc = vio_enable_interrupts(vdev); 6270 if (rc) { 6271 dev_err(dev, "Error %d enabling interrupts\n", rc); 6272 goto req_irq_failed; 6273 } 6274 6275 crq->cur = 0; 6276 spin_lock_init(&crq->lock); 6277 6278 /* process any CRQs that were queued before we enabled interrupts */ 6279 tasklet_schedule(&adapter->tasklet); 6280 6281 return retrc; 6282 6283 req_irq_failed: 6284 tasklet_kill(&adapter->tasklet); 6285 do { 6286 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6287 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6288 reg_crq_failed: 6289 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6290 map_failed: 6291 free_page((unsigned long)crq->msgs); 6292 crq->msgs = NULL; 6293 return retrc; 6294 } 6295 6296 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6297 { 6298 struct device *dev = &adapter->vdev->dev; 6299 unsigned long timeout = msecs_to_jiffies(20000); 6300 u64 old_num_rx_queues = adapter->req_rx_queues; 6301 u64 old_num_tx_queues = adapter->req_tx_queues; 6302 int rc; 6303 6304 adapter->from_passive_init = false; 6305 6306 rc = ibmvnic_send_crq_init(adapter); 6307 if (rc) { 6308 dev_err(dev, "Send crq init failed with error %d\n", rc); 6309 return rc; 6310 } 6311 6312 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6313 dev_err(dev, "Initialization sequence timed out\n"); 6314 return -ETIMEDOUT; 6315 } 6316 6317 if (adapter->init_done_rc) { 6318 release_crq_queue(adapter); 6319 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6320 return adapter->init_done_rc; 6321 } 6322 6323 if (adapter->from_passive_init) { 6324 adapter->state = VNIC_OPEN; 6325 adapter->from_passive_init = false; 6326 dev_err(dev, "CRQ-init failed, passive-init\n"); 6327 return -EINVAL; 6328 } 6329 6330 if (reset && 6331 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6332 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6333 if (adapter->req_rx_queues != old_num_rx_queues || 6334 adapter->req_tx_queues != old_num_tx_queues) { 6335 release_sub_crqs(adapter, 0); 6336 rc = init_sub_crqs(adapter); 6337 } else { 6338 /* no need to reinitialize completely, but we do 6339 * need to clean up transmits that were in flight 6340 * when we processed the reset. Failure to do so 6341 * will confound the upper layer, usually TCP, by 6342 * creating the illusion of transmits that are 6343 * awaiting completion. 6344 */ 6345 clean_tx_pools(adapter); 6346 6347 rc = reset_sub_crq_queues(adapter); 6348 } 6349 } else { 6350 rc = init_sub_crqs(adapter); 6351 } 6352 6353 if (rc) { 6354 dev_err(dev, "Initialization of sub crqs failed\n"); 6355 release_crq_queue(adapter); 6356 return rc; 6357 } 6358 6359 rc = init_sub_crq_irqs(adapter); 6360 if (rc) { 6361 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6362 release_crq_queue(adapter); 6363 } 6364 6365 return rc; 6366 } 6367 6368 static struct device_attribute dev_attr_failover; 6369 6370 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6371 { 6372 struct ibmvnic_adapter *adapter; 6373 struct net_device *netdev; 6374 unsigned char *mac_addr_p; 6375 unsigned long flags; 6376 bool init_success; 6377 int rc; 6378 6379 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6380 dev->unit_address); 6381 6382 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6383 VETH_MAC_ADDR, NULL); 6384 if (!mac_addr_p) { 6385 dev_err(&dev->dev, 6386 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6387 __FILE__, __LINE__); 6388 return 0; 6389 } 6390 6391 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6392 IBMVNIC_MAX_QUEUES); 6393 if (!netdev) 6394 return -ENOMEM; 6395 6396 adapter = netdev_priv(netdev); 6397 adapter->state = VNIC_PROBING; 6398 dev_set_drvdata(&dev->dev, netdev); 6399 adapter->vdev = dev; 6400 adapter->netdev = netdev; 6401 adapter->login_pending = false; 6402 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6403 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6404 bitmap_set(adapter->map_ids, 0, 1); 6405 6406 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6407 eth_hw_addr_set(netdev, adapter->mac_addr); 6408 netdev->irq = dev->irq; 6409 netdev->netdev_ops = &ibmvnic_netdev_ops; 6410 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6411 SET_NETDEV_DEV(netdev, &dev->dev); 6412 6413 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6414 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6415 __ibmvnic_delayed_reset); 6416 INIT_LIST_HEAD(&adapter->rwi_list); 6417 spin_lock_init(&adapter->rwi_lock); 6418 spin_lock_init(&adapter->state_lock); 6419 mutex_init(&adapter->fw_lock); 6420 init_completion(&adapter->probe_done); 6421 init_completion(&adapter->init_done); 6422 init_completion(&adapter->fw_done); 6423 init_completion(&adapter->reset_done); 6424 init_completion(&adapter->stats_done); 6425 clear_bit(0, &adapter->resetting); 6426 adapter->prev_rx_buf_sz = 0; 6427 adapter->prev_mtu = 0; 6428 6429 init_success = false; 6430 do { 6431 reinit_init_done(adapter); 6432 6433 /* clear any failovers we got in the previous pass 6434 * since we are reinitializing the CRQ 6435 */ 6436 adapter->failover_pending = false; 6437 6438 /* If we had already initialized CRQ, we may have one or 6439 * more resets queued already. Discard those and release 6440 * the CRQ before initializing the CRQ again. 6441 */ 6442 release_crq_queue(adapter); 6443 6444 /* Since we are still in PROBING state, __ibmvnic_reset() 6445 * will not access the ->rwi_list and since we released CRQ, 6446 * we won't get _new_ transport events. But there maybe an 6447 * ongoing ibmvnic_reset() call. So serialize access to 6448 * rwi_list. If we win the race, ibvmnic_reset() could add 6449 * a reset after we purged but thats ok - we just may end 6450 * up with an extra reset (i.e similar to having two or more 6451 * resets in the queue at once). 6452 * CHECK. 6453 */ 6454 spin_lock_irqsave(&adapter->rwi_lock, flags); 6455 flush_reset_queue(adapter); 6456 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6457 6458 rc = init_crq_queue(adapter); 6459 if (rc) { 6460 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6461 rc); 6462 goto ibmvnic_init_fail; 6463 } 6464 6465 rc = ibmvnic_reset_init(adapter, false); 6466 } while (rc == -EAGAIN); 6467 6468 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6469 * partner is not ready. CRQ is not active. When the partner becomes 6470 * ready, we will do the passive init reset. 6471 */ 6472 6473 if (!rc) 6474 init_success = true; 6475 6476 rc = init_stats_buffers(adapter); 6477 if (rc) 6478 goto ibmvnic_init_fail; 6479 6480 rc = init_stats_token(adapter); 6481 if (rc) 6482 goto ibmvnic_stats_fail; 6483 6484 rc = device_create_file(&dev->dev, &dev_attr_failover); 6485 if (rc) 6486 goto ibmvnic_dev_file_err; 6487 6488 netif_carrier_off(netdev); 6489 6490 if (init_success) { 6491 adapter->state = VNIC_PROBED; 6492 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6493 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6494 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6495 } else { 6496 adapter->state = VNIC_DOWN; 6497 } 6498 6499 adapter->wait_for_reset = false; 6500 adapter->last_reset_time = jiffies; 6501 6502 rc = register_netdev(netdev); 6503 if (rc) { 6504 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6505 goto ibmvnic_register_fail; 6506 } 6507 dev_info(&dev->dev, "ibmvnic registered\n"); 6508 6509 rc = ibmvnic_cpu_notif_add(adapter); 6510 if (rc) { 6511 netdev_err(netdev, "Registering cpu notifier failed\n"); 6512 goto cpu_notif_add_failed; 6513 } 6514 6515 complete(&adapter->probe_done); 6516 6517 return 0; 6518 6519 cpu_notif_add_failed: 6520 unregister_netdev(netdev); 6521 6522 ibmvnic_register_fail: 6523 device_remove_file(&dev->dev, &dev_attr_failover); 6524 6525 ibmvnic_dev_file_err: 6526 release_stats_token(adapter); 6527 6528 ibmvnic_stats_fail: 6529 release_stats_buffers(adapter); 6530 6531 ibmvnic_init_fail: 6532 release_sub_crqs(adapter, 1); 6533 release_crq_queue(adapter); 6534 6535 /* cleanup worker thread after releasing CRQ so we don't get 6536 * transport events (i.e new work items for the worker thread). 6537 */ 6538 adapter->state = VNIC_REMOVING; 6539 complete(&adapter->probe_done); 6540 flush_work(&adapter->ibmvnic_reset); 6541 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6542 6543 flush_reset_queue(adapter); 6544 6545 mutex_destroy(&adapter->fw_lock); 6546 free_netdev(netdev); 6547 6548 return rc; 6549 } 6550 6551 static void ibmvnic_remove(struct vio_dev *dev) 6552 { 6553 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6554 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6555 unsigned long flags; 6556 6557 spin_lock_irqsave(&adapter->state_lock, flags); 6558 6559 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6560 * finish. Then, set the state to REMOVING to prevent it from 6561 * scheduling any more work and to have reset functions ignore 6562 * any resets that have already been scheduled. Drop the lock 6563 * after setting state, so __ibmvnic_reset() which is called 6564 * from the flush_work() below, can make progress. 6565 */ 6566 spin_lock(&adapter->rwi_lock); 6567 adapter->state = VNIC_REMOVING; 6568 spin_unlock(&adapter->rwi_lock); 6569 6570 spin_unlock_irqrestore(&adapter->state_lock, flags); 6571 6572 ibmvnic_cpu_notif_remove(adapter); 6573 6574 flush_work(&adapter->ibmvnic_reset); 6575 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6576 6577 rtnl_lock(); 6578 unregister_netdevice(netdev); 6579 6580 release_resources(adapter); 6581 release_rx_pools(adapter); 6582 release_tx_pools(adapter); 6583 release_sub_crqs(adapter, 1); 6584 release_crq_queue(adapter); 6585 6586 release_stats_token(adapter); 6587 release_stats_buffers(adapter); 6588 6589 adapter->state = VNIC_REMOVED; 6590 6591 rtnl_unlock(); 6592 mutex_destroy(&adapter->fw_lock); 6593 device_remove_file(&dev->dev, &dev_attr_failover); 6594 free_netdev(netdev); 6595 dev_set_drvdata(&dev->dev, NULL); 6596 } 6597 6598 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6599 const char *buf, size_t count) 6600 { 6601 struct net_device *netdev = dev_get_drvdata(dev); 6602 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6603 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6604 __be64 session_token; 6605 long rc; 6606 6607 if (!sysfs_streq(buf, "1")) 6608 return -EINVAL; 6609 6610 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6611 H_GET_SESSION_TOKEN, 0, 0, 0); 6612 if (rc) { 6613 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6614 rc); 6615 goto last_resort; 6616 } 6617 6618 session_token = (__be64)retbuf[0]; 6619 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6620 be64_to_cpu(session_token)); 6621 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6622 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6623 if (rc) { 6624 netdev_err(netdev, 6625 "H_VIOCTL initiated failover failed, rc %ld\n", 6626 rc); 6627 goto last_resort; 6628 } 6629 6630 return count; 6631 6632 last_resort: 6633 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6634 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6635 6636 return count; 6637 } 6638 static DEVICE_ATTR_WO(failover); 6639 6640 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6641 { 6642 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6643 struct ibmvnic_adapter *adapter; 6644 struct iommu_table *tbl; 6645 unsigned long ret = 0; 6646 int i; 6647 6648 tbl = get_iommu_table_base(&vdev->dev); 6649 6650 /* netdev inits at probe time along with the structures we need below*/ 6651 if (!netdev) 6652 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6653 6654 adapter = netdev_priv(netdev); 6655 6656 ret += PAGE_SIZE; /* the crq message queue */ 6657 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6658 6659 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6660 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6661 6662 for (i = 0; i < adapter->num_active_rx_pools; i++) 6663 ret += adapter->rx_pool[i].size * 6664 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6665 6666 return ret; 6667 } 6668 6669 static int ibmvnic_resume(struct device *dev) 6670 { 6671 struct net_device *netdev = dev_get_drvdata(dev); 6672 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6673 6674 if (adapter->state != VNIC_OPEN) 6675 return 0; 6676 6677 tasklet_schedule(&adapter->tasklet); 6678 6679 return 0; 6680 } 6681 6682 static const struct vio_device_id ibmvnic_device_table[] = { 6683 {"network", "IBM,vnic"}, 6684 {"", "" } 6685 }; 6686 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6687 6688 static const struct dev_pm_ops ibmvnic_pm_ops = { 6689 .resume = ibmvnic_resume 6690 }; 6691 6692 static struct vio_driver ibmvnic_driver = { 6693 .id_table = ibmvnic_device_table, 6694 .probe = ibmvnic_probe, 6695 .remove = ibmvnic_remove, 6696 .get_desired_dma = ibmvnic_get_desired_dma, 6697 .name = ibmvnic_driver_name, 6698 .pm = &ibmvnic_pm_ops, 6699 }; 6700 6701 /* module functions */ 6702 static int __init ibmvnic_module_init(void) 6703 { 6704 int ret; 6705 6706 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6707 ibmvnic_cpu_online, 6708 ibmvnic_cpu_down_prep); 6709 if (ret < 0) 6710 goto out; 6711 ibmvnic_online = ret; 6712 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6713 NULL, ibmvnic_cpu_dead); 6714 if (ret) 6715 goto err_dead; 6716 6717 ret = vio_register_driver(&ibmvnic_driver); 6718 if (ret) 6719 goto err_vio_register; 6720 6721 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6722 IBMVNIC_DRIVER_VERSION); 6723 6724 return 0; 6725 err_vio_register: 6726 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6727 err_dead: 6728 cpuhp_remove_multi_state(ibmvnic_online); 6729 out: 6730 return ret; 6731 } 6732 6733 static void __exit ibmvnic_module_exit(void) 6734 { 6735 vio_unregister_driver(&ibmvnic_driver); 6736 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6737 cpuhp_remove_multi_state(ibmvnic_online); 6738 } 6739 6740 module_init(ibmvnic_module_init); 6741 module_exit(ibmvnic_module_exit); 6742