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