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/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 110 struct ibmvnic_sub_crq_queue *tx_scrq); 111 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 112 struct ibmvnic_long_term_buff *ltb); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 149 { 150 union ibmvnic_crq crq; 151 152 memset(&crq, 0, sizeof(crq)); 153 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 154 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 155 156 return ibmvnic_send_crq(adapter, &crq); 157 } 158 159 static int send_version_xchg(struct ibmvnic_adapter *adapter) 160 { 161 union ibmvnic_crq crq; 162 163 memset(&crq, 0, sizeof(crq)); 164 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 165 crq.version_exchange.cmd = VERSION_EXCHANGE; 166 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 167 168 return ibmvnic_send_crq(adapter, &crq); 169 } 170 171 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 172 unsigned long length, unsigned long *number, 173 unsigned long *irq) 174 { 175 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 176 long rc; 177 178 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 179 *number = retbuf[0]; 180 *irq = retbuf[1]; 181 182 return rc; 183 } 184 185 /** 186 * ibmvnic_wait_for_completion - Check device state and wait for completion 187 * @adapter: private device data 188 * @comp_done: completion structure to wait for 189 * @timeout: time to wait in milliseconds 190 * 191 * Wait for a completion signal or until the timeout limit is reached 192 * while checking that the device is still active. 193 */ 194 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 195 struct completion *comp_done, 196 unsigned long timeout) 197 { 198 struct net_device *netdev; 199 unsigned long div_timeout; 200 u8 retry; 201 202 netdev = adapter->netdev; 203 retry = 5; 204 div_timeout = msecs_to_jiffies(timeout / retry); 205 while (true) { 206 if (!adapter->crq.active) { 207 netdev_err(netdev, "Device down!\n"); 208 return -ENODEV; 209 } 210 if (!retry--) 211 break; 212 if (wait_for_completion_timeout(comp_done, div_timeout)) 213 return 0; 214 } 215 netdev_err(netdev, "Operation timed out.\n"); 216 return -ETIMEDOUT; 217 } 218 219 /** 220 * reuse_ltb() - Check if a long term buffer can be reused 221 * @ltb: The long term buffer to be checked 222 * @size: The size of the long term buffer. 223 * 224 * An LTB can be reused unless its size has changed. 225 * 226 * Return: Return true if the LTB can be reused, false otherwise. 227 */ 228 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 229 { 230 return (ltb->buff && ltb->size == size); 231 } 232 233 /** 234 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 235 * 236 * @adapter: ibmvnic adapter associated to the LTB 237 * @ltb: container object for the LTB 238 * @size: size of the LTB 239 * 240 * Allocate an LTB of the specified size and notify VIOS. 241 * 242 * If the given @ltb already has the correct size, reuse it. Otherwise if 243 * its non-NULL, free it. Then allocate a new one of the correct size. 244 * Notify the VIOS either way since we may now be working with a new VIOS. 245 * 246 * Allocating larger chunks of memory during resets, specially LPM or under 247 * low memory situations can cause resets to fail/timeout and for LPAR to 248 * lose connectivity. So hold onto the LTB even if we fail to communicate 249 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 250 * 251 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 252 * a negative value otherwise. 253 */ 254 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 255 struct ibmvnic_long_term_buff *ltb, int size) 256 { 257 struct device *dev = &adapter->vdev->dev; 258 int rc; 259 260 if (!reuse_ltb(ltb, size)) { 261 dev_dbg(dev, 262 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 263 ltb->size, size); 264 free_long_term_buff(adapter, ltb); 265 } 266 267 if (ltb->buff) { 268 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 269 ltb->map_id, ltb->size); 270 } else { 271 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 272 GFP_KERNEL); 273 if (!ltb->buff) { 274 dev_err(dev, "Couldn't alloc long term buffer\n"); 275 return -ENOMEM; 276 } 277 ltb->size = size; 278 279 ltb->map_id = find_first_zero_bit(adapter->map_ids, 280 MAX_MAP_ID); 281 bitmap_set(adapter->map_ids, ltb->map_id, 1); 282 283 dev_dbg(dev, 284 "Allocated new LTB [map %d, size 0x%llx]\n", 285 ltb->map_id, ltb->size); 286 } 287 288 /* Ensure ltb is zeroed - specially when reusing it. */ 289 memset(ltb->buff, 0, ltb->size); 290 291 mutex_lock(&adapter->fw_lock); 292 adapter->fw_done_rc = 0; 293 reinit_completion(&adapter->fw_done); 294 295 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 296 if (rc) { 297 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 298 goto out; 299 } 300 301 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 302 if (rc) { 303 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 304 rc); 305 goto out; 306 } 307 308 if (adapter->fw_done_rc) { 309 dev_err(dev, "Couldn't map LTB, rc = %d\n", 310 adapter->fw_done_rc); 311 rc = -1; 312 goto out; 313 } 314 rc = 0; 315 out: 316 /* don't free LTB on communication error - see function header */ 317 mutex_unlock(&adapter->fw_lock); 318 return rc; 319 } 320 321 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 322 struct ibmvnic_long_term_buff *ltb) 323 { 324 struct device *dev = &adapter->vdev->dev; 325 326 if (!ltb->buff) 327 return; 328 329 /* VIOS automatically unmaps the long term buffer at remote 330 * end for the following resets: 331 * FAILOVER, MOBILITY, TIMEOUT. 332 */ 333 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 334 adapter->reset_reason != VNIC_RESET_MOBILITY && 335 adapter->reset_reason != VNIC_RESET_TIMEOUT) 336 send_request_unmap(adapter, ltb->map_id); 337 338 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 339 340 ltb->buff = NULL; 341 /* mark this map_id free */ 342 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 343 ltb->map_id = 0; 344 } 345 346 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 347 { 348 int i; 349 350 for (i = 0; i < adapter->num_active_rx_pools; i++) 351 adapter->rx_pool[i].active = 0; 352 } 353 354 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 355 struct ibmvnic_rx_pool *pool) 356 { 357 int count = pool->size - atomic_read(&pool->available); 358 u64 handle = adapter->rx_scrq[pool->index]->handle; 359 struct device *dev = &adapter->vdev->dev; 360 struct ibmvnic_ind_xmit_queue *ind_bufp; 361 struct ibmvnic_sub_crq_queue *rx_scrq; 362 union sub_crq *sub_crq; 363 int buffers_added = 0; 364 unsigned long lpar_rc; 365 struct sk_buff *skb; 366 unsigned int offset; 367 dma_addr_t dma_addr; 368 unsigned char *dst; 369 int shift = 0; 370 int index; 371 int i; 372 373 if (!pool->active) 374 return; 375 376 rx_scrq = adapter->rx_scrq[pool->index]; 377 ind_bufp = &rx_scrq->ind_buf; 378 379 /* netdev_skb_alloc() could have failed after we saved a few skbs 380 * in the indir_buf and we would not have sent them to VIOS yet. 381 * To account for them, start the loop at ind_bufp->index rather 382 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 383 * be 0. 384 */ 385 for (i = ind_bufp->index; i < count; ++i) { 386 index = pool->free_map[pool->next_free]; 387 388 /* We maybe reusing the skb from earlier resets. Allocate 389 * only if necessary. But since the LTB may have changed 390 * during reset (see init_rx_pools()), update LTB below 391 * even if reusing skb. 392 */ 393 skb = pool->rx_buff[index].skb; 394 if (!skb) { 395 skb = netdev_alloc_skb(adapter->netdev, 396 pool->buff_size); 397 if (!skb) { 398 dev_err(dev, "Couldn't replenish rx buff\n"); 399 adapter->replenish_no_mem++; 400 break; 401 } 402 } 403 404 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 405 pool->next_free = (pool->next_free + 1) % pool->size; 406 407 /* Copy the skb to the long term mapped DMA buffer */ 408 offset = index * pool->buff_size; 409 dst = pool->long_term_buff.buff + offset; 410 memset(dst, 0, pool->buff_size); 411 dma_addr = pool->long_term_buff.addr + offset; 412 413 /* add the skb to an rx_buff in the pool */ 414 pool->rx_buff[index].data = dst; 415 pool->rx_buff[index].dma = dma_addr; 416 pool->rx_buff[index].skb = skb; 417 pool->rx_buff[index].pool_index = pool->index; 418 pool->rx_buff[index].size = pool->buff_size; 419 420 /* queue the rx_buff for the next send_subcrq_indirect */ 421 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 422 memset(sub_crq, 0, sizeof(*sub_crq)); 423 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 424 sub_crq->rx_add.correlator = 425 cpu_to_be64((u64)&pool->rx_buff[index]); 426 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 427 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 428 429 /* The length field of the sCRQ is defined to be 24 bits so the 430 * buffer size needs to be left shifted by a byte before it is 431 * converted to big endian to prevent the last byte from being 432 * truncated. 433 */ 434 #ifdef __LITTLE_ENDIAN__ 435 shift = 8; 436 #endif 437 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 438 439 /* if send_subcrq_indirect queue is full, flush to VIOS */ 440 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 441 i == count - 1) { 442 lpar_rc = 443 send_subcrq_indirect(adapter, handle, 444 (u64)ind_bufp->indir_dma, 445 (u64)ind_bufp->index); 446 if (lpar_rc != H_SUCCESS) 447 goto failure; 448 buffers_added += ind_bufp->index; 449 adapter->replenish_add_buff_success += ind_bufp->index; 450 ind_bufp->index = 0; 451 } 452 } 453 atomic_add(buffers_added, &pool->available); 454 return; 455 456 failure: 457 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 458 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 459 for (i = ind_bufp->index - 1; i >= 0; --i) { 460 struct ibmvnic_rx_buff *rx_buff; 461 462 pool->next_free = pool->next_free == 0 ? 463 pool->size - 1 : pool->next_free - 1; 464 sub_crq = &ind_bufp->indir_arr[i]; 465 rx_buff = (struct ibmvnic_rx_buff *) 466 be64_to_cpu(sub_crq->rx_add.correlator); 467 index = (int)(rx_buff - pool->rx_buff); 468 pool->free_map[pool->next_free] = index; 469 dev_kfree_skb_any(pool->rx_buff[index].skb); 470 pool->rx_buff[index].skb = NULL; 471 } 472 adapter->replenish_add_buff_failure += ind_bufp->index; 473 atomic_add(buffers_added, &pool->available); 474 ind_bufp->index = 0; 475 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 476 /* Disable buffer pool replenishment and report carrier off if 477 * queue is closed or pending failover. 478 * Firmware guarantees that a signal will be sent to the 479 * driver, triggering a reset. 480 */ 481 deactivate_rx_pools(adapter); 482 netif_carrier_off(adapter->netdev); 483 } 484 } 485 486 static void replenish_pools(struct ibmvnic_adapter *adapter) 487 { 488 int i; 489 490 adapter->replenish_task_cycles++; 491 for (i = 0; i < adapter->num_active_rx_pools; i++) { 492 if (adapter->rx_pool[i].active) 493 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 494 } 495 496 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 497 } 498 499 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 500 { 501 kfree(adapter->tx_stats_buffers); 502 kfree(adapter->rx_stats_buffers); 503 adapter->tx_stats_buffers = NULL; 504 adapter->rx_stats_buffers = NULL; 505 } 506 507 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 508 { 509 adapter->tx_stats_buffers = 510 kcalloc(IBMVNIC_MAX_QUEUES, 511 sizeof(struct ibmvnic_tx_queue_stats), 512 GFP_KERNEL); 513 if (!adapter->tx_stats_buffers) 514 return -ENOMEM; 515 516 adapter->rx_stats_buffers = 517 kcalloc(IBMVNIC_MAX_QUEUES, 518 sizeof(struct ibmvnic_rx_queue_stats), 519 GFP_KERNEL); 520 if (!adapter->rx_stats_buffers) 521 return -ENOMEM; 522 523 return 0; 524 } 525 526 static void release_stats_token(struct ibmvnic_adapter *adapter) 527 { 528 struct device *dev = &adapter->vdev->dev; 529 530 if (!adapter->stats_token) 531 return; 532 533 dma_unmap_single(dev, adapter->stats_token, 534 sizeof(struct ibmvnic_statistics), 535 DMA_FROM_DEVICE); 536 adapter->stats_token = 0; 537 } 538 539 static int init_stats_token(struct ibmvnic_adapter *adapter) 540 { 541 struct device *dev = &adapter->vdev->dev; 542 dma_addr_t stok; 543 544 stok = dma_map_single(dev, &adapter->stats, 545 sizeof(struct ibmvnic_statistics), 546 DMA_FROM_DEVICE); 547 if (dma_mapping_error(dev, stok)) { 548 dev_err(dev, "Couldn't map stats buffer\n"); 549 return -1; 550 } 551 552 adapter->stats_token = stok; 553 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 554 return 0; 555 } 556 557 /** 558 * release_rx_pools() - Release any rx pools attached to @adapter. 559 * @adapter: ibmvnic adapter 560 * 561 * Safe to call this multiple times - even if no pools are attached. 562 */ 563 static void release_rx_pools(struct ibmvnic_adapter *adapter) 564 { 565 struct ibmvnic_rx_pool *rx_pool; 566 int i, j; 567 568 if (!adapter->rx_pool) 569 return; 570 571 for (i = 0; i < adapter->num_active_rx_pools; i++) { 572 rx_pool = &adapter->rx_pool[i]; 573 574 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 575 576 kfree(rx_pool->free_map); 577 578 free_long_term_buff(adapter, &rx_pool->long_term_buff); 579 580 if (!rx_pool->rx_buff) 581 continue; 582 583 for (j = 0; j < rx_pool->size; j++) { 584 if (rx_pool->rx_buff[j].skb) { 585 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 586 rx_pool->rx_buff[j].skb = NULL; 587 } 588 } 589 590 kfree(rx_pool->rx_buff); 591 } 592 593 kfree(adapter->rx_pool); 594 adapter->rx_pool = NULL; 595 adapter->num_active_rx_pools = 0; 596 adapter->prev_rx_pool_size = 0; 597 } 598 599 /** 600 * reuse_rx_pools() - Check if the existing rx pools can be reused. 601 * @adapter: ibmvnic adapter 602 * 603 * Check if the existing rx pools in the adapter can be reused. The 604 * pools can be reused if the pool parameters (number of pools, 605 * number of buffers in the pool and size of each buffer) have not 606 * changed. 607 * 608 * NOTE: This assumes that all pools have the same number of buffers 609 * which is the case currently. If that changes, we must fix this. 610 * 611 * Return: true if the rx pools can be reused, false otherwise. 612 */ 613 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 614 { 615 u64 old_num_pools, new_num_pools; 616 u64 old_pool_size, new_pool_size; 617 u64 old_buff_size, new_buff_size; 618 619 if (!adapter->rx_pool) 620 return false; 621 622 old_num_pools = adapter->num_active_rx_pools; 623 new_num_pools = adapter->req_rx_queues; 624 625 old_pool_size = adapter->prev_rx_pool_size; 626 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 627 628 old_buff_size = adapter->prev_rx_buf_sz; 629 new_buff_size = adapter->cur_rx_buf_sz; 630 631 /* Require buff size to be exactly same for now */ 632 if (old_buff_size != new_buff_size) 633 return false; 634 635 if (old_num_pools == new_num_pools && old_pool_size == new_pool_size) 636 return true; 637 638 if (old_num_pools < adapter->min_rx_queues || 639 old_num_pools > adapter->max_rx_queues || 640 old_pool_size < adapter->min_rx_add_entries_per_subcrq || 641 old_pool_size > adapter->max_rx_add_entries_per_subcrq) 642 return false; 643 644 return true; 645 } 646 647 /** 648 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 649 * @netdev: net device associated with the vnic interface 650 * 651 * Initialize the set of receiver pools in the ibmvnic adapter associated 652 * with the net_device @netdev. If possible, reuse the existing rx pools. 653 * Otherwise free any existing pools and allocate a new set of pools 654 * before initializing them. 655 * 656 * Return: 0 on success and negative value on error. 657 */ 658 static int init_rx_pools(struct net_device *netdev) 659 { 660 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 661 struct device *dev = &adapter->vdev->dev; 662 struct ibmvnic_rx_pool *rx_pool; 663 u64 num_pools; 664 u64 pool_size; /* # of buffers in one pool */ 665 u64 buff_size; 666 int i, j; 667 668 pool_size = adapter->req_rx_add_entries_per_subcrq; 669 num_pools = adapter->req_rx_queues; 670 buff_size = adapter->cur_rx_buf_sz; 671 672 if (reuse_rx_pools(adapter)) { 673 dev_dbg(dev, "Reusing rx pools\n"); 674 goto update_ltb; 675 } 676 677 /* Allocate/populate the pools. */ 678 release_rx_pools(adapter); 679 680 adapter->rx_pool = kcalloc(num_pools, 681 sizeof(struct ibmvnic_rx_pool), 682 GFP_KERNEL); 683 if (!adapter->rx_pool) { 684 dev_err(dev, "Failed to allocate rx pools\n"); 685 return -1; 686 } 687 688 /* Set num_active_rx_pools early. If we fail below after partial 689 * allocation, release_rx_pools() will know how many to look for. 690 */ 691 adapter->num_active_rx_pools = num_pools; 692 693 for (i = 0; i < num_pools; i++) { 694 rx_pool = &adapter->rx_pool[i]; 695 696 netdev_dbg(adapter->netdev, 697 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 698 i, pool_size, buff_size); 699 700 rx_pool->size = pool_size; 701 rx_pool->index = i; 702 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 703 704 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 705 GFP_KERNEL); 706 if (!rx_pool->free_map) { 707 dev_err(dev, "Couldn't alloc free_map %d\n", i); 708 goto out_release; 709 } 710 711 rx_pool->rx_buff = kcalloc(rx_pool->size, 712 sizeof(struct ibmvnic_rx_buff), 713 GFP_KERNEL); 714 if (!rx_pool->rx_buff) { 715 dev_err(dev, "Couldn't alloc rx buffers\n"); 716 goto out_release; 717 } 718 } 719 720 adapter->prev_rx_pool_size = pool_size; 721 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 722 723 update_ltb: 724 for (i = 0; i < num_pools; i++) { 725 rx_pool = &adapter->rx_pool[i]; 726 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 727 i, rx_pool->size, rx_pool->buff_size); 728 729 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 730 rx_pool->size * rx_pool->buff_size)) 731 goto out; 732 733 for (j = 0; j < rx_pool->size; ++j) { 734 struct ibmvnic_rx_buff *rx_buff; 735 736 rx_pool->free_map[j] = j; 737 738 /* NOTE: Don't clear rx_buff->skb here - will leak 739 * memory! replenish_rx_pool() will reuse skbs or 740 * allocate as necessary. 741 */ 742 rx_buff = &rx_pool->rx_buff[j]; 743 rx_buff->dma = 0; 744 rx_buff->data = 0; 745 rx_buff->size = 0; 746 rx_buff->pool_index = 0; 747 } 748 749 /* Mark pool "empty" so replenish_rx_pools() will 750 * update the LTB info for each buffer 751 */ 752 atomic_set(&rx_pool->available, 0); 753 rx_pool->next_alloc = 0; 754 rx_pool->next_free = 0; 755 /* replenish_rx_pool() may have called deactivate_rx_pools() 756 * on failover. Ensure pool is active now. 757 */ 758 rx_pool->active = 1; 759 } 760 return 0; 761 out_release: 762 release_rx_pools(adapter); 763 out: 764 /* We failed to allocate one or more LTBs or map them on the VIOS. 765 * Hold onto the pools and any LTBs that we did allocate/map. 766 */ 767 return -1; 768 } 769 770 static void release_vpd_data(struct ibmvnic_adapter *adapter) 771 { 772 if (!adapter->vpd) 773 return; 774 775 kfree(adapter->vpd->buff); 776 kfree(adapter->vpd); 777 778 adapter->vpd = NULL; 779 } 780 781 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 782 struct ibmvnic_tx_pool *tx_pool) 783 { 784 kfree(tx_pool->tx_buff); 785 kfree(tx_pool->free_map); 786 free_long_term_buff(adapter, &tx_pool->long_term_buff); 787 } 788 789 /** 790 * release_tx_pools() - Release any tx pools attached to @adapter. 791 * @adapter: ibmvnic adapter 792 * 793 * Safe to call this multiple times - even if no pools are attached. 794 */ 795 static void release_tx_pools(struct ibmvnic_adapter *adapter) 796 { 797 int i; 798 799 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 800 * both NULL or both non-NULL. So we only need to check one. 801 */ 802 if (!adapter->tx_pool) 803 return; 804 805 for (i = 0; i < adapter->num_active_tx_pools; i++) { 806 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 807 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 808 } 809 810 kfree(adapter->tx_pool); 811 adapter->tx_pool = NULL; 812 kfree(adapter->tso_pool); 813 adapter->tso_pool = NULL; 814 adapter->num_active_tx_pools = 0; 815 adapter->prev_tx_pool_size = 0; 816 } 817 818 static int init_one_tx_pool(struct net_device *netdev, 819 struct ibmvnic_tx_pool *tx_pool, 820 int pool_size, int buf_size) 821 { 822 int i; 823 824 tx_pool->tx_buff = kcalloc(pool_size, 825 sizeof(struct ibmvnic_tx_buff), 826 GFP_KERNEL); 827 if (!tx_pool->tx_buff) 828 return -1; 829 830 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 831 if (!tx_pool->free_map) { 832 kfree(tx_pool->tx_buff); 833 tx_pool->tx_buff = NULL; 834 return -1; 835 } 836 837 for (i = 0; i < pool_size; i++) 838 tx_pool->free_map[i] = i; 839 840 tx_pool->consumer_index = 0; 841 tx_pool->producer_index = 0; 842 tx_pool->num_buffers = pool_size; 843 tx_pool->buf_size = buf_size; 844 845 return 0; 846 } 847 848 /** 849 * reuse_tx_pools() - Check if the existing tx pools can be reused. 850 * @adapter: ibmvnic adapter 851 * 852 * Check if the existing tx pools in the adapter can be reused. The 853 * pools can be reused if the pool parameters (number of pools, 854 * number of buffers in the pool and mtu) have not changed. 855 * 856 * NOTE: This assumes that all pools have the same number of buffers 857 * which is the case currently. If that changes, we must fix this. 858 * 859 * Return: true if the tx pools can be reused, false otherwise. 860 */ 861 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 862 { 863 u64 old_num_pools, new_num_pools; 864 u64 old_pool_size, new_pool_size; 865 u64 old_mtu, new_mtu; 866 867 if (!adapter->tx_pool) 868 return false; 869 870 old_num_pools = adapter->num_active_tx_pools; 871 new_num_pools = adapter->num_active_tx_scrqs; 872 old_pool_size = adapter->prev_tx_pool_size; 873 new_pool_size = adapter->req_tx_entries_per_subcrq; 874 old_mtu = adapter->prev_mtu; 875 new_mtu = adapter->req_mtu; 876 877 /* Require MTU to be exactly same to reuse pools for now */ 878 if (old_mtu != new_mtu) 879 return false; 880 881 if (old_num_pools == new_num_pools && old_pool_size == new_pool_size) 882 return true; 883 884 if (old_num_pools < adapter->min_tx_queues || 885 old_num_pools > adapter->max_tx_queues || 886 old_pool_size < adapter->min_tx_entries_per_subcrq || 887 old_pool_size > adapter->max_tx_entries_per_subcrq) 888 return false; 889 890 return true; 891 } 892 893 /** 894 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 895 * @netdev: net device associated with the vnic interface 896 * 897 * Initialize the set of transmit pools in the ibmvnic adapter associated 898 * with the net_device @netdev. If possible, reuse the existing tx pools. 899 * Otherwise free any existing pools and allocate a new set of pools 900 * before initializing them. 901 * 902 * Return: 0 on success and negative value on error. 903 */ 904 static int init_tx_pools(struct net_device *netdev) 905 { 906 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 907 struct device *dev = &adapter->vdev->dev; 908 int num_pools; 909 u64 pool_size; /* # of buffers in pool */ 910 u64 buff_size; 911 int i, j, rc; 912 913 num_pools = adapter->req_tx_queues; 914 915 /* We must notify the VIOS about the LTB on all resets - but we only 916 * need to alloc/populate pools if either the number of buffers or 917 * size of each buffer in the pool has changed. 918 */ 919 if (reuse_tx_pools(adapter)) { 920 netdev_dbg(netdev, "Reusing tx pools\n"); 921 goto update_ltb; 922 } 923 924 /* Allocate/populate the pools. */ 925 release_tx_pools(adapter); 926 927 pool_size = adapter->req_tx_entries_per_subcrq; 928 num_pools = adapter->num_active_tx_scrqs; 929 930 adapter->tx_pool = kcalloc(num_pools, 931 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 932 if (!adapter->tx_pool) 933 return -1; 934 935 adapter->tso_pool = kcalloc(num_pools, 936 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 937 /* To simplify release_tx_pools() ensure that ->tx_pool and 938 * ->tso_pool are either both NULL or both non-NULL. 939 */ 940 if (!adapter->tso_pool) { 941 kfree(adapter->tx_pool); 942 adapter->tx_pool = NULL; 943 return -1; 944 } 945 946 /* Set num_active_tx_pools early. If we fail below after partial 947 * allocation, release_tx_pools() will know how many to look for. 948 */ 949 adapter->num_active_tx_pools = num_pools; 950 951 buff_size = adapter->req_mtu + VLAN_HLEN; 952 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 953 954 for (i = 0; i < num_pools; i++) { 955 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 956 i, adapter->req_tx_entries_per_subcrq, buff_size); 957 958 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 959 pool_size, buff_size); 960 if (rc) 961 goto out_release; 962 963 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 964 IBMVNIC_TSO_BUFS, 965 IBMVNIC_TSO_BUF_SZ); 966 if (rc) 967 goto out_release; 968 } 969 970 adapter->prev_tx_pool_size = pool_size; 971 adapter->prev_mtu = adapter->req_mtu; 972 973 update_ltb: 974 /* NOTE: All tx_pools have the same number of buffers (which is 975 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 976 * buffers (see calls init_one_tx_pool() for these). 977 * For consistency, we use tx_pool->num_buffers and 978 * tso_pool->num_buffers below. 979 */ 980 rc = -1; 981 for (i = 0; i < num_pools; i++) { 982 struct ibmvnic_tx_pool *tso_pool; 983 struct ibmvnic_tx_pool *tx_pool; 984 u32 ltb_size; 985 986 tx_pool = &adapter->tx_pool[i]; 987 ltb_size = tx_pool->num_buffers * tx_pool->buf_size; 988 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 989 ltb_size)) 990 goto out; 991 992 dev_dbg(dev, "Updated LTB for tx pool %d [%p, %d, %d]\n", 993 i, tx_pool->long_term_buff.buff, 994 tx_pool->num_buffers, tx_pool->buf_size); 995 996 tx_pool->consumer_index = 0; 997 tx_pool->producer_index = 0; 998 999 for (j = 0; j < tx_pool->num_buffers; j++) 1000 tx_pool->free_map[j] = j; 1001 1002 tso_pool = &adapter->tso_pool[i]; 1003 ltb_size = tso_pool->num_buffers * tso_pool->buf_size; 1004 if (alloc_long_term_buff(adapter, &tso_pool->long_term_buff, 1005 ltb_size)) 1006 goto out; 1007 1008 dev_dbg(dev, "Updated LTB for tso pool %d [%p, %d, %d]\n", 1009 i, tso_pool->long_term_buff.buff, 1010 tso_pool->num_buffers, tso_pool->buf_size); 1011 1012 tso_pool->consumer_index = 0; 1013 tso_pool->producer_index = 0; 1014 1015 for (j = 0; j < tso_pool->num_buffers; j++) 1016 tso_pool->free_map[j] = j; 1017 } 1018 1019 return 0; 1020 out_release: 1021 release_tx_pools(adapter); 1022 out: 1023 /* We failed to allocate one or more LTBs or map them on the VIOS. 1024 * Hold onto the pools and any LTBs that we did allocate/map. 1025 */ 1026 return rc; 1027 } 1028 1029 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1030 { 1031 int i; 1032 1033 if (adapter->napi_enabled) 1034 return; 1035 1036 for (i = 0; i < adapter->req_rx_queues; i++) 1037 napi_enable(&adapter->napi[i]); 1038 1039 adapter->napi_enabled = true; 1040 } 1041 1042 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1043 { 1044 int i; 1045 1046 if (!adapter->napi_enabled) 1047 return; 1048 1049 for (i = 0; i < adapter->req_rx_queues; i++) { 1050 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1051 napi_disable(&adapter->napi[i]); 1052 } 1053 1054 adapter->napi_enabled = false; 1055 } 1056 1057 static int init_napi(struct ibmvnic_adapter *adapter) 1058 { 1059 int i; 1060 1061 adapter->napi = kcalloc(adapter->req_rx_queues, 1062 sizeof(struct napi_struct), GFP_KERNEL); 1063 if (!adapter->napi) 1064 return -ENOMEM; 1065 1066 for (i = 0; i < adapter->req_rx_queues; i++) { 1067 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1068 netif_napi_add(adapter->netdev, &adapter->napi[i], 1069 ibmvnic_poll, NAPI_POLL_WEIGHT); 1070 } 1071 1072 adapter->num_active_rx_napi = adapter->req_rx_queues; 1073 return 0; 1074 } 1075 1076 static void release_napi(struct ibmvnic_adapter *adapter) 1077 { 1078 int i; 1079 1080 if (!adapter->napi) 1081 return; 1082 1083 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1084 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1085 netif_napi_del(&adapter->napi[i]); 1086 } 1087 1088 kfree(adapter->napi); 1089 adapter->napi = NULL; 1090 adapter->num_active_rx_napi = 0; 1091 adapter->napi_enabled = false; 1092 } 1093 1094 static const char *adapter_state_to_string(enum vnic_state state) 1095 { 1096 switch (state) { 1097 case VNIC_PROBING: 1098 return "PROBING"; 1099 case VNIC_PROBED: 1100 return "PROBED"; 1101 case VNIC_OPENING: 1102 return "OPENING"; 1103 case VNIC_OPEN: 1104 return "OPEN"; 1105 case VNIC_CLOSING: 1106 return "CLOSING"; 1107 case VNIC_CLOSED: 1108 return "CLOSED"; 1109 case VNIC_REMOVING: 1110 return "REMOVING"; 1111 case VNIC_REMOVED: 1112 return "REMOVED"; 1113 case VNIC_DOWN: 1114 return "DOWN"; 1115 } 1116 return "UNKNOWN"; 1117 } 1118 1119 static int ibmvnic_login(struct net_device *netdev) 1120 { 1121 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1122 unsigned long timeout = msecs_to_jiffies(20000); 1123 int retry_count = 0; 1124 int retries = 10; 1125 bool retry; 1126 int rc; 1127 1128 do { 1129 retry = false; 1130 if (retry_count > retries) { 1131 netdev_warn(netdev, "Login attempts exceeded\n"); 1132 return -1; 1133 } 1134 1135 adapter->init_done_rc = 0; 1136 reinit_completion(&adapter->init_done); 1137 rc = send_login(adapter); 1138 if (rc) 1139 return rc; 1140 1141 if (!wait_for_completion_timeout(&adapter->init_done, 1142 timeout)) { 1143 netdev_warn(netdev, "Login timed out, retrying...\n"); 1144 retry = true; 1145 adapter->init_done_rc = 0; 1146 retry_count++; 1147 continue; 1148 } 1149 1150 if (adapter->init_done_rc == ABORTED) { 1151 netdev_warn(netdev, "Login aborted, retrying...\n"); 1152 retry = true; 1153 adapter->init_done_rc = 0; 1154 retry_count++; 1155 /* FW or device may be busy, so 1156 * wait a bit before retrying login 1157 */ 1158 msleep(500); 1159 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1160 retry_count++; 1161 release_sub_crqs(adapter, 1); 1162 1163 retry = true; 1164 netdev_dbg(netdev, 1165 "Received partial success, retrying...\n"); 1166 adapter->init_done_rc = 0; 1167 reinit_completion(&adapter->init_done); 1168 send_query_cap(adapter); 1169 if (!wait_for_completion_timeout(&adapter->init_done, 1170 timeout)) { 1171 netdev_warn(netdev, 1172 "Capabilities query timed out\n"); 1173 return -1; 1174 } 1175 1176 rc = init_sub_crqs(adapter); 1177 if (rc) { 1178 netdev_warn(netdev, 1179 "SCRQ initialization failed\n"); 1180 return -1; 1181 } 1182 1183 rc = init_sub_crq_irqs(adapter); 1184 if (rc) { 1185 netdev_warn(netdev, 1186 "SCRQ irq initialization failed\n"); 1187 return -1; 1188 } 1189 } else if (adapter->init_done_rc) { 1190 netdev_warn(netdev, "Adapter login failed\n"); 1191 return -1; 1192 } 1193 } while (retry); 1194 1195 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1196 1197 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1198 return 0; 1199 } 1200 1201 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1202 { 1203 kfree(adapter->login_buf); 1204 adapter->login_buf = NULL; 1205 } 1206 1207 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1208 { 1209 kfree(adapter->login_rsp_buf); 1210 adapter->login_rsp_buf = NULL; 1211 } 1212 1213 static void release_resources(struct ibmvnic_adapter *adapter) 1214 { 1215 release_vpd_data(adapter); 1216 1217 release_napi(adapter); 1218 release_login_buffer(adapter); 1219 release_login_rsp_buffer(adapter); 1220 } 1221 1222 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1223 { 1224 struct net_device *netdev = adapter->netdev; 1225 unsigned long timeout = msecs_to_jiffies(20000); 1226 union ibmvnic_crq crq; 1227 bool resend; 1228 int rc; 1229 1230 netdev_dbg(netdev, "setting link state %d\n", link_state); 1231 1232 memset(&crq, 0, sizeof(crq)); 1233 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1234 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1235 crq.logical_link_state.link_state = link_state; 1236 1237 do { 1238 resend = false; 1239 1240 reinit_completion(&adapter->init_done); 1241 rc = ibmvnic_send_crq(adapter, &crq); 1242 if (rc) { 1243 netdev_err(netdev, "Failed to set link state\n"); 1244 return rc; 1245 } 1246 1247 if (!wait_for_completion_timeout(&adapter->init_done, 1248 timeout)) { 1249 netdev_err(netdev, "timeout setting link state\n"); 1250 return -1; 1251 } 1252 1253 if (adapter->init_done_rc == PARTIALSUCCESS) { 1254 /* Partuial success, delay and re-send */ 1255 mdelay(1000); 1256 resend = true; 1257 } else if (adapter->init_done_rc) { 1258 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1259 adapter->init_done_rc); 1260 return adapter->init_done_rc; 1261 } 1262 } while (resend); 1263 1264 return 0; 1265 } 1266 1267 static int set_real_num_queues(struct net_device *netdev) 1268 { 1269 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1270 int rc; 1271 1272 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1273 adapter->req_tx_queues, adapter->req_rx_queues); 1274 1275 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1276 if (rc) { 1277 netdev_err(netdev, "failed to set the number of tx queues\n"); 1278 return rc; 1279 } 1280 1281 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1282 if (rc) 1283 netdev_err(netdev, "failed to set the number of rx queues\n"); 1284 1285 return rc; 1286 } 1287 1288 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1289 { 1290 struct device *dev = &adapter->vdev->dev; 1291 union ibmvnic_crq crq; 1292 int len = 0; 1293 int rc; 1294 1295 if (adapter->vpd->buff) 1296 len = adapter->vpd->len; 1297 1298 mutex_lock(&adapter->fw_lock); 1299 adapter->fw_done_rc = 0; 1300 reinit_completion(&adapter->fw_done); 1301 1302 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1303 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1304 rc = ibmvnic_send_crq(adapter, &crq); 1305 if (rc) { 1306 mutex_unlock(&adapter->fw_lock); 1307 return rc; 1308 } 1309 1310 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1311 if (rc) { 1312 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1313 mutex_unlock(&adapter->fw_lock); 1314 return rc; 1315 } 1316 mutex_unlock(&adapter->fw_lock); 1317 1318 if (!adapter->vpd->len) 1319 return -ENODATA; 1320 1321 if (!adapter->vpd->buff) 1322 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1323 else if (adapter->vpd->len != len) 1324 adapter->vpd->buff = 1325 krealloc(adapter->vpd->buff, 1326 adapter->vpd->len, GFP_KERNEL); 1327 1328 if (!adapter->vpd->buff) { 1329 dev_err(dev, "Could allocate VPD buffer\n"); 1330 return -ENOMEM; 1331 } 1332 1333 adapter->vpd->dma_addr = 1334 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1335 DMA_FROM_DEVICE); 1336 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1337 dev_err(dev, "Could not map VPD buffer\n"); 1338 kfree(adapter->vpd->buff); 1339 adapter->vpd->buff = NULL; 1340 return -ENOMEM; 1341 } 1342 1343 mutex_lock(&adapter->fw_lock); 1344 adapter->fw_done_rc = 0; 1345 reinit_completion(&adapter->fw_done); 1346 1347 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1348 crq.get_vpd.cmd = GET_VPD; 1349 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1350 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1351 rc = ibmvnic_send_crq(adapter, &crq); 1352 if (rc) { 1353 kfree(adapter->vpd->buff); 1354 adapter->vpd->buff = NULL; 1355 mutex_unlock(&adapter->fw_lock); 1356 return rc; 1357 } 1358 1359 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1360 if (rc) { 1361 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1362 kfree(adapter->vpd->buff); 1363 adapter->vpd->buff = NULL; 1364 mutex_unlock(&adapter->fw_lock); 1365 return rc; 1366 } 1367 1368 mutex_unlock(&adapter->fw_lock); 1369 return 0; 1370 } 1371 1372 static int init_resources(struct ibmvnic_adapter *adapter) 1373 { 1374 struct net_device *netdev = adapter->netdev; 1375 int rc; 1376 1377 rc = set_real_num_queues(netdev); 1378 if (rc) 1379 return rc; 1380 1381 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1382 if (!adapter->vpd) 1383 return -ENOMEM; 1384 1385 /* Vital Product Data (VPD) */ 1386 rc = ibmvnic_get_vpd(adapter); 1387 if (rc) { 1388 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1389 return rc; 1390 } 1391 1392 rc = init_napi(adapter); 1393 if (rc) 1394 return rc; 1395 1396 send_query_map(adapter); 1397 1398 rc = init_rx_pools(netdev); 1399 if (rc) 1400 return rc; 1401 1402 rc = init_tx_pools(netdev); 1403 return rc; 1404 } 1405 1406 static int __ibmvnic_open(struct net_device *netdev) 1407 { 1408 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1409 enum vnic_state prev_state = adapter->state; 1410 int i, rc; 1411 1412 adapter->state = VNIC_OPENING; 1413 replenish_pools(adapter); 1414 ibmvnic_napi_enable(adapter); 1415 1416 /* We're ready to receive frames, enable the sub-crq interrupts and 1417 * set the logical link state to up 1418 */ 1419 for (i = 0; i < adapter->req_rx_queues; i++) { 1420 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1421 if (prev_state == VNIC_CLOSED) 1422 enable_irq(adapter->rx_scrq[i]->irq); 1423 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1424 } 1425 1426 for (i = 0; i < adapter->req_tx_queues; i++) { 1427 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1428 if (prev_state == VNIC_CLOSED) 1429 enable_irq(adapter->tx_scrq[i]->irq); 1430 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1431 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1432 } 1433 1434 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1435 if (rc) { 1436 ibmvnic_napi_disable(adapter); 1437 release_resources(adapter); 1438 return rc; 1439 } 1440 1441 netif_tx_start_all_queues(netdev); 1442 1443 if (prev_state == VNIC_CLOSED) { 1444 for (i = 0; i < adapter->req_rx_queues; i++) 1445 napi_schedule(&adapter->napi[i]); 1446 } 1447 1448 adapter->state = VNIC_OPEN; 1449 return rc; 1450 } 1451 1452 static int ibmvnic_open(struct net_device *netdev) 1453 { 1454 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1455 int rc; 1456 1457 ASSERT_RTNL(); 1458 1459 /* If device failover is pending or we are about to reset, just set 1460 * device state and return. Device operation will be handled by reset 1461 * routine. 1462 * 1463 * It should be safe to overwrite the adapter->state here. Since 1464 * we hold the rtnl, either the reset has not actually started or 1465 * the rtnl got dropped during the set_link_state() in do_reset(). 1466 * In the former case, no one else is changing the state (again we 1467 * have the rtnl) and in the latter case, do_reset() will detect and 1468 * honor our setting below. 1469 */ 1470 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1471 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1472 adapter_state_to_string(adapter->state), 1473 adapter->failover_pending); 1474 adapter->state = VNIC_OPEN; 1475 rc = 0; 1476 goto out; 1477 } 1478 1479 if (adapter->state != VNIC_CLOSED) { 1480 rc = ibmvnic_login(netdev); 1481 if (rc) 1482 goto out; 1483 1484 rc = init_resources(adapter); 1485 if (rc) { 1486 netdev_err(netdev, "failed to initialize resources\n"); 1487 release_resources(adapter); 1488 release_rx_pools(adapter); 1489 release_tx_pools(adapter); 1490 goto out; 1491 } 1492 } 1493 1494 rc = __ibmvnic_open(netdev); 1495 1496 out: 1497 /* If open failed and there is a pending failover or in-progress reset, 1498 * set device state and return. Device operation will be handled by 1499 * reset routine. See also comments above regarding rtnl. 1500 */ 1501 if (rc && 1502 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1503 adapter->state = VNIC_OPEN; 1504 rc = 0; 1505 } 1506 return rc; 1507 } 1508 1509 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1510 { 1511 struct ibmvnic_rx_pool *rx_pool; 1512 struct ibmvnic_rx_buff *rx_buff; 1513 u64 rx_entries; 1514 int rx_scrqs; 1515 int i, j; 1516 1517 if (!adapter->rx_pool) 1518 return; 1519 1520 rx_scrqs = adapter->num_active_rx_pools; 1521 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1522 1523 /* Free any remaining skbs in the rx buffer pools */ 1524 for (i = 0; i < rx_scrqs; i++) { 1525 rx_pool = &adapter->rx_pool[i]; 1526 if (!rx_pool || !rx_pool->rx_buff) 1527 continue; 1528 1529 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1530 for (j = 0; j < rx_entries; j++) { 1531 rx_buff = &rx_pool->rx_buff[j]; 1532 if (rx_buff && rx_buff->skb) { 1533 dev_kfree_skb_any(rx_buff->skb); 1534 rx_buff->skb = NULL; 1535 } 1536 } 1537 } 1538 } 1539 1540 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1541 struct ibmvnic_tx_pool *tx_pool) 1542 { 1543 struct ibmvnic_tx_buff *tx_buff; 1544 u64 tx_entries; 1545 int i; 1546 1547 if (!tx_pool || !tx_pool->tx_buff) 1548 return; 1549 1550 tx_entries = tx_pool->num_buffers; 1551 1552 for (i = 0; i < tx_entries; i++) { 1553 tx_buff = &tx_pool->tx_buff[i]; 1554 if (tx_buff && tx_buff->skb) { 1555 dev_kfree_skb_any(tx_buff->skb); 1556 tx_buff->skb = NULL; 1557 } 1558 } 1559 } 1560 1561 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1562 { 1563 int tx_scrqs; 1564 int i; 1565 1566 if (!adapter->tx_pool || !adapter->tso_pool) 1567 return; 1568 1569 tx_scrqs = adapter->num_active_tx_pools; 1570 1571 /* Free any remaining skbs in the tx buffer pools */ 1572 for (i = 0; i < tx_scrqs; i++) { 1573 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1574 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1575 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1576 } 1577 } 1578 1579 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1580 { 1581 struct net_device *netdev = adapter->netdev; 1582 int i; 1583 1584 if (adapter->tx_scrq) { 1585 for (i = 0; i < adapter->req_tx_queues; i++) 1586 if (adapter->tx_scrq[i]->irq) { 1587 netdev_dbg(netdev, 1588 "Disabling tx_scrq[%d] irq\n", i); 1589 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1590 disable_irq(adapter->tx_scrq[i]->irq); 1591 } 1592 } 1593 1594 if (adapter->rx_scrq) { 1595 for (i = 0; i < adapter->req_rx_queues; i++) { 1596 if (adapter->rx_scrq[i]->irq) { 1597 netdev_dbg(netdev, 1598 "Disabling rx_scrq[%d] irq\n", i); 1599 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1600 disable_irq(adapter->rx_scrq[i]->irq); 1601 } 1602 } 1603 } 1604 } 1605 1606 static void ibmvnic_cleanup(struct net_device *netdev) 1607 { 1608 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1609 1610 /* ensure that transmissions are stopped if called by do_reset */ 1611 if (test_bit(0, &adapter->resetting)) 1612 netif_tx_disable(netdev); 1613 else 1614 netif_tx_stop_all_queues(netdev); 1615 1616 ibmvnic_napi_disable(adapter); 1617 ibmvnic_disable_irqs(adapter); 1618 } 1619 1620 static int __ibmvnic_close(struct net_device *netdev) 1621 { 1622 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1623 int rc = 0; 1624 1625 adapter->state = VNIC_CLOSING; 1626 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1627 adapter->state = VNIC_CLOSED; 1628 return rc; 1629 } 1630 1631 static int ibmvnic_close(struct net_device *netdev) 1632 { 1633 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1634 int rc; 1635 1636 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1637 adapter_state_to_string(adapter->state), 1638 adapter->failover_pending, 1639 adapter->force_reset_recovery); 1640 1641 /* If device failover is pending, just set device state and return. 1642 * Device operation will be handled by reset routine. 1643 */ 1644 if (adapter->failover_pending) { 1645 adapter->state = VNIC_CLOSED; 1646 return 0; 1647 } 1648 1649 rc = __ibmvnic_close(netdev); 1650 ibmvnic_cleanup(netdev); 1651 clean_rx_pools(adapter); 1652 clean_tx_pools(adapter); 1653 1654 return rc; 1655 } 1656 1657 /** 1658 * build_hdr_data - creates L2/L3/L4 header data buffer 1659 * @hdr_field: bitfield determining needed headers 1660 * @skb: socket buffer 1661 * @hdr_len: array of header lengths 1662 * @hdr_data: buffer to write the header to 1663 * 1664 * Reads hdr_field to determine which headers are needed by firmware. 1665 * Builds a buffer containing these headers. Saves individual header 1666 * lengths and total buffer length to be used to build descriptors. 1667 */ 1668 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1669 int *hdr_len, u8 *hdr_data) 1670 { 1671 int len = 0; 1672 u8 *hdr; 1673 1674 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1675 hdr_len[0] = sizeof(struct vlan_ethhdr); 1676 else 1677 hdr_len[0] = sizeof(struct ethhdr); 1678 1679 if (skb->protocol == htons(ETH_P_IP)) { 1680 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1681 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1682 hdr_len[2] = tcp_hdrlen(skb); 1683 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1684 hdr_len[2] = sizeof(struct udphdr); 1685 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1686 hdr_len[1] = sizeof(struct ipv6hdr); 1687 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1688 hdr_len[2] = tcp_hdrlen(skb); 1689 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1690 hdr_len[2] = sizeof(struct udphdr); 1691 } else if (skb->protocol == htons(ETH_P_ARP)) { 1692 hdr_len[1] = arp_hdr_len(skb->dev); 1693 hdr_len[2] = 0; 1694 } 1695 1696 memset(hdr_data, 0, 120); 1697 if ((hdr_field >> 6) & 1) { 1698 hdr = skb_mac_header(skb); 1699 memcpy(hdr_data, hdr, hdr_len[0]); 1700 len += hdr_len[0]; 1701 } 1702 1703 if ((hdr_field >> 5) & 1) { 1704 hdr = skb_network_header(skb); 1705 memcpy(hdr_data + len, hdr, hdr_len[1]); 1706 len += hdr_len[1]; 1707 } 1708 1709 if ((hdr_field >> 4) & 1) { 1710 hdr = skb_transport_header(skb); 1711 memcpy(hdr_data + len, hdr, hdr_len[2]); 1712 len += hdr_len[2]; 1713 } 1714 return len; 1715 } 1716 1717 /** 1718 * create_hdr_descs - create header and header extension descriptors 1719 * @hdr_field: bitfield determining needed headers 1720 * @hdr_data: buffer containing header data 1721 * @len: length of data buffer 1722 * @hdr_len: array of individual header lengths 1723 * @scrq_arr: descriptor array 1724 * 1725 * Creates header and, if needed, header extension descriptors and 1726 * places them in a descriptor array, scrq_arr 1727 */ 1728 1729 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1730 union sub_crq *scrq_arr) 1731 { 1732 union sub_crq hdr_desc; 1733 int tmp_len = len; 1734 int num_descs = 0; 1735 u8 *data, *cur; 1736 int tmp; 1737 1738 while (tmp_len > 0) { 1739 cur = hdr_data + len - tmp_len; 1740 1741 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1742 if (cur != hdr_data) { 1743 data = hdr_desc.hdr_ext.data; 1744 tmp = tmp_len > 29 ? 29 : tmp_len; 1745 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1746 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1747 hdr_desc.hdr_ext.len = tmp; 1748 } else { 1749 data = hdr_desc.hdr.data; 1750 tmp = tmp_len > 24 ? 24 : tmp_len; 1751 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1752 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1753 hdr_desc.hdr.len = tmp; 1754 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1755 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1756 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1757 hdr_desc.hdr.flag = hdr_field << 1; 1758 } 1759 memcpy(data, cur, tmp); 1760 tmp_len -= tmp; 1761 *scrq_arr = hdr_desc; 1762 scrq_arr++; 1763 num_descs++; 1764 } 1765 1766 return num_descs; 1767 } 1768 1769 /** 1770 * build_hdr_descs_arr - build a header descriptor array 1771 * @skb: tx socket buffer 1772 * @indir_arr: indirect array 1773 * @num_entries: number of descriptors to be sent 1774 * @hdr_field: bit field determining which headers will be sent 1775 * 1776 * This function will build a TX descriptor array with applicable 1777 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1778 */ 1779 1780 static void build_hdr_descs_arr(struct sk_buff *skb, 1781 union sub_crq *indir_arr, 1782 int *num_entries, u8 hdr_field) 1783 { 1784 int hdr_len[3] = {0, 0, 0}; 1785 u8 hdr_data[140] = {0}; 1786 int tot_len; 1787 1788 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1789 hdr_data); 1790 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1791 indir_arr + 1); 1792 } 1793 1794 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1795 struct net_device *netdev) 1796 { 1797 /* For some backing devices, mishandling of small packets 1798 * can result in a loss of connection or TX stall. Device 1799 * architects recommend that no packet should be smaller 1800 * than the minimum MTU value provided to the driver, so 1801 * pad any packets to that length 1802 */ 1803 if (skb->len < netdev->min_mtu) 1804 return skb_put_padto(skb, netdev->min_mtu); 1805 1806 return 0; 1807 } 1808 1809 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1810 struct ibmvnic_sub_crq_queue *tx_scrq) 1811 { 1812 struct ibmvnic_ind_xmit_queue *ind_bufp; 1813 struct ibmvnic_tx_buff *tx_buff; 1814 struct ibmvnic_tx_pool *tx_pool; 1815 union sub_crq tx_scrq_entry; 1816 int queue_num; 1817 int entries; 1818 int index; 1819 int i; 1820 1821 ind_bufp = &tx_scrq->ind_buf; 1822 entries = (u64)ind_bufp->index; 1823 queue_num = tx_scrq->pool_index; 1824 1825 for (i = entries - 1; i >= 0; --i) { 1826 tx_scrq_entry = ind_bufp->indir_arr[i]; 1827 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1828 continue; 1829 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1830 if (index & IBMVNIC_TSO_POOL_MASK) { 1831 tx_pool = &adapter->tso_pool[queue_num]; 1832 index &= ~IBMVNIC_TSO_POOL_MASK; 1833 } else { 1834 tx_pool = &adapter->tx_pool[queue_num]; 1835 } 1836 tx_pool->free_map[tx_pool->consumer_index] = index; 1837 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1838 tx_pool->num_buffers - 1 : 1839 tx_pool->consumer_index - 1; 1840 tx_buff = &tx_pool->tx_buff[index]; 1841 adapter->netdev->stats.tx_packets--; 1842 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1843 adapter->tx_stats_buffers[queue_num].packets--; 1844 adapter->tx_stats_buffers[queue_num].bytes -= 1845 tx_buff->skb->len; 1846 dev_kfree_skb_any(tx_buff->skb); 1847 tx_buff->skb = NULL; 1848 adapter->netdev->stats.tx_dropped++; 1849 } 1850 ind_bufp->index = 0; 1851 if (atomic_sub_return(entries, &tx_scrq->used) <= 1852 (adapter->req_tx_entries_per_subcrq / 2) && 1853 __netif_subqueue_stopped(adapter->netdev, queue_num) && 1854 !test_bit(0, &adapter->resetting)) { 1855 netif_wake_subqueue(adapter->netdev, queue_num); 1856 netdev_dbg(adapter->netdev, "Started queue %d\n", 1857 queue_num); 1858 } 1859 } 1860 1861 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1862 struct ibmvnic_sub_crq_queue *tx_scrq) 1863 { 1864 struct ibmvnic_ind_xmit_queue *ind_bufp; 1865 u64 dma_addr; 1866 u64 entries; 1867 u64 handle; 1868 int rc; 1869 1870 ind_bufp = &tx_scrq->ind_buf; 1871 dma_addr = (u64)ind_bufp->indir_dma; 1872 entries = (u64)ind_bufp->index; 1873 handle = tx_scrq->handle; 1874 1875 if (!entries) 1876 return 0; 1877 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1878 if (rc) 1879 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1880 else 1881 ind_bufp->index = 0; 1882 return 0; 1883 } 1884 1885 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1886 { 1887 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1888 int queue_num = skb_get_queue_mapping(skb); 1889 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1890 struct device *dev = &adapter->vdev->dev; 1891 struct ibmvnic_ind_xmit_queue *ind_bufp; 1892 struct ibmvnic_tx_buff *tx_buff = NULL; 1893 struct ibmvnic_sub_crq_queue *tx_scrq; 1894 struct ibmvnic_tx_pool *tx_pool; 1895 unsigned int tx_send_failed = 0; 1896 netdev_tx_t ret = NETDEV_TX_OK; 1897 unsigned int tx_map_failed = 0; 1898 union sub_crq indir_arr[16]; 1899 unsigned int tx_dropped = 0; 1900 unsigned int tx_packets = 0; 1901 unsigned int tx_bytes = 0; 1902 dma_addr_t data_dma_addr; 1903 struct netdev_queue *txq; 1904 unsigned long lpar_rc; 1905 union sub_crq tx_crq; 1906 unsigned int offset; 1907 int num_entries = 1; 1908 unsigned char *dst; 1909 int index = 0; 1910 u8 proto = 0; 1911 1912 tx_scrq = adapter->tx_scrq[queue_num]; 1913 txq = netdev_get_tx_queue(netdev, queue_num); 1914 ind_bufp = &tx_scrq->ind_buf; 1915 1916 if (test_bit(0, &adapter->resetting)) { 1917 dev_kfree_skb_any(skb); 1918 1919 tx_send_failed++; 1920 tx_dropped++; 1921 ret = NETDEV_TX_OK; 1922 goto out; 1923 } 1924 1925 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1926 tx_dropped++; 1927 tx_send_failed++; 1928 ret = NETDEV_TX_OK; 1929 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1930 goto out; 1931 } 1932 if (skb_is_gso(skb)) 1933 tx_pool = &adapter->tso_pool[queue_num]; 1934 else 1935 tx_pool = &adapter->tx_pool[queue_num]; 1936 1937 index = tx_pool->free_map[tx_pool->consumer_index]; 1938 1939 if (index == IBMVNIC_INVALID_MAP) { 1940 dev_kfree_skb_any(skb); 1941 tx_send_failed++; 1942 tx_dropped++; 1943 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1944 ret = NETDEV_TX_OK; 1945 goto out; 1946 } 1947 1948 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1949 1950 offset = index * tx_pool->buf_size; 1951 dst = tx_pool->long_term_buff.buff + offset; 1952 memset(dst, 0, tx_pool->buf_size); 1953 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1954 1955 if (skb_shinfo(skb)->nr_frags) { 1956 int cur, i; 1957 1958 /* Copy the head */ 1959 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1960 cur = skb_headlen(skb); 1961 1962 /* Copy the frags */ 1963 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1964 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1965 1966 memcpy(dst + cur, skb_frag_address(frag), 1967 skb_frag_size(frag)); 1968 cur += skb_frag_size(frag); 1969 } 1970 } else { 1971 skb_copy_from_linear_data(skb, dst, skb->len); 1972 } 1973 1974 /* post changes to long_term_buff *dst before VIOS accessing it */ 1975 dma_wmb(); 1976 1977 tx_pool->consumer_index = 1978 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1979 1980 tx_buff = &tx_pool->tx_buff[index]; 1981 tx_buff->skb = skb; 1982 tx_buff->index = index; 1983 tx_buff->pool_index = queue_num; 1984 1985 memset(&tx_crq, 0, sizeof(tx_crq)); 1986 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1987 tx_crq.v1.type = IBMVNIC_TX_DESC; 1988 tx_crq.v1.n_crq_elem = 1; 1989 tx_crq.v1.n_sge = 1; 1990 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1991 1992 if (skb_is_gso(skb)) 1993 tx_crq.v1.correlator = 1994 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1995 else 1996 tx_crq.v1.correlator = cpu_to_be32(index); 1997 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1998 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1999 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2000 2001 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2002 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2003 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2004 } 2005 2006 if (skb->protocol == htons(ETH_P_IP)) { 2007 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2008 proto = ip_hdr(skb)->protocol; 2009 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2010 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2011 proto = ipv6_hdr(skb)->nexthdr; 2012 } 2013 2014 if (proto == IPPROTO_TCP) 2015 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2016 else if (proto == IPPROTO_UDP) 2017 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2018 2019 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2020 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2021 hdrs += 2; 2022 } 2023 if (skb_is_gso(skb)) { 2024 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2025 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2026 hdrs += 2; 2027 } 2028 2029 if ((*hdrs >> 7) & 1) 2030 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2031 2032 tx_crq.v1.n_crq_elem = num_entries; 2033 tx_buff->num_entries = num_entries; 2034 /* flush buffer if current entry can not fit */ 2035 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2036 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2037 if (lpar_rc != H_SUCCESS) 2038 goto tx_flush_err; 2039 } 2040 2041 indir_arr[0] = tx_crq; 2042 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2043 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2044 ind_bufp->index += num_entries; 2045 if (__netdev_tx_sent_queue(txq, skb->len, 2046 netdev_xmit_more() && 2047 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2048 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2049 if (lpar_rc != H_SUCCESS) 2050 goto tx_err; 2051 } 2052 2053 if (atomic_add_return(num_entries, &tx_scrq->used) 2054 >= adapter->req_tx_entries_per_subcrq) { 2055 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2056 netif_stop_subqueue(netdev, queue_num); 2057 } 2058 2059 tx_packets++; 2060 tx_bytes += skb->len; 2061 txq_trans_cond_update(txq); 2062 ret = NETDEV_TX_OK; 2063 goto out; 2064 2065 tx_flush_err: 2066 dev_kfree_skb_any(skb); 2067 tx_buff->skb = NULL; 2068 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2069 tx_pool->num_buffers - 1 : 2070 tx_pool->consumer_index - 1; 2071 tx_dropped++; 2072 tx_err: 2073 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2074 dev_err_ratelimited(dev, "tx: send failed\n"); 2075 2076 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2077 /* Disable TX and report carrier off if queue is closed 2078 * or pending failover. 2079 * Firmware guarantees that a signal will be sent to the 2080 * driver, triggering a reset or some other action. 2081 */ 2082 netif_tx_stop_all_queues(netdev); 2083 netif_carrier_off(netdev); 2084 } 2085 out: 2086 netdev->stats.tx_dropped += tx_dropped; 2087 netdev->stats.tx_bytes += tx_bytes; 2088 netdev->stats.tx_packets += tx_packets; 2089 adapter->tx_send_failed += tx_send_failed; 2090 adapter->tx_map_failed += tx_map_failed; 2091 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2092 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2093 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2094 2095 return ret; 2096 } 2097 2098 static void ibmvnic_set_multi(struct net_device *netdev) 2099 { 2100 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2101 struct netdev_hw_addr *ha; 2102 union ibmvnic_crq crq; 2103 2104 memset(&crq, 0, sizeof(crq)); 2105 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2106 crq.request_capability.cmd = REQUEST_CAPABILITY; 2107 2108 if (netdev->flags & IFF_PROMISC) { 2109 if (!adapter->promisc_supported) 2110 return; 2111 } else { 2112 if (netdev->flags & IFF_ALLMULTI) { 2113 /* Accept all multicast */ 2114 memset(&crq, 0, sizeof(crq)); 2115 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2116 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2117 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2118 ibmvnic_send_crq(adapter, &crq); 2119 } else if (netdev_mc_empty(netdev)) { 2120 /* Reject all multicast */ 2121 memset(&crq, 0, sizeof(crq)); 2122 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2123 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2124 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2125 ibmvnic_send_crq(adapter, &crq); 2126 } else { 2127 /* Accept one or more multicast(s) */ 2128 netdev_for_each_mc_addr(ha, netdev) { 2129 memset(&crq, 0, sizeof(crq)); 2130 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2131 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2132 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2133 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2134 ha->addr); 2135 ibmvnic_send_crq(adapter, &crq); 2136 } 2137 } 2138 } 2139 } 2140 2141 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2142 { 2143 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2144 union ibmvnic_crq crq; 2145 int rc; 2146 2147 if (!is_valid_ether_addr(dev_addr)) { 2148 rc = -EADDRNOTAVAIL; 2149 goto err; 2150 } 2151 2152 memset(&crq, 0, sizeof(crq)); 2153 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2154 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2155 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2156 2157 mutex_lock(&adapter->fw_lock); 2158 adapter->fw_done_rc = 0; 2159 reinit_completion(&adapter->fw_done); 2160 2161 rc = ibmvnic_send_crq(adapter, &crq); 2162 if (rc) { 2163 rc = -EIO; 2164 mutex_unlock(&adapter->fw_lock); 2165 goto err; 2166 } 2167 2168 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2169 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2170 if (rc || adapter->fw_done_rc) { 2171 rc = -EIO; 2172 mutex_unlock(&adapter->fw_lock); 2173 goto err; 2174 } 2175 mutex_unlock(&adapter->fw_lock); 2176 return 0; 2177 err: 2178 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2179 return rc; 2180 } 2181 2182 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2183 { 2184 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2185 struct sockaddr *addr = p; 2186 int rc; 2187 2188 rc = 0; 2189 if (!is_valid_ether_addr(addr->sa_data)) 2190 return -EADDRNOTAVAIL; 2191 2192 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2193 if (adapter->state != VNIC_PROBED) 2194 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2195 2196 return rc; 2197 } 2198 2199 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2200 { 2201 switch (reason) { 2202 case VNIC_RESET_FAILOVER: 2203 return "FAILOVER"; 2204 case VNIC_RESET_MOBILITY: 2205 return "MOBILITY"; 2206 case VNIC_RESET_FATAL: 2207 return "FATAL"; 2208 case VNIC_RESET_NON_FATAL: 2209 return "NON_FATAL"; 2210 case VNIC_RESET_TIMEOUT: 2211 return "TIMEOUT"; 2212 case VNIC_RESET_CHANGE_PARAM: 2213 return "CHANGE_PARAM"; 2214 case VNIC_RESET_PASSIVE_INIT: 2215 return "PASSIVE_INIT"; 2216 } 2217 return "UNKNOWN"; 2218 } 2219 2220 /* 2221 * do_reset returns zero if we are able to keep processing reset events, or 2222 * non-zero if we hit a fatal error and must halt. 2223 */ 2224 static int do_reset(struct ibmvnic_adapter *adapter, 2225 struct ibmvnic_rwi *rwi, u32 reset_state) 2226 { 2227 struct net_device *netdev = adapter->netdev; 2228 u64 old_num_rx_queues, old_num_tx_queues; 2229 u64 old_num_rx_slots, old_num_tx_slots; 2230 int rc; 2231 2232 netdev_dbg(adapter->netdev, 2233 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2234 adapter_state_to_string(adapter->state), 2235 adapter->failover_pending, 2236 reset_reason_to_string(rwi->reset_reason), 2237 adapter_state_to_string(reset_state)); 2238 2239 adapter->reset_reason = rwi->reset_reason; 2240 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2241 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2242 rtnl_lock(); 2243 2244 /* Now that we have the rtnl lock, clear any pending failover. 2245 * This will ensure ibmvnic_open() has either completed or will 2246 * block until failover is complete. 2247 */ 2248 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2249 adapter->failover_pending = false; 2250 2251 /* read the state and check (again) after getting rtnl */ 2252 reset_state = adapter->state; 2253 2254 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2255 rc = -EBUSY; 2256 goto out; 2257 } 2258 2259 netif_carrier_off(netdev); 2260 2261 old_num_rx_queues = adapter->req_rx_queues; 2262 old_num_tx_queues = adapter->req_tx_queues; 2263 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2264 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2265 2266 ibmvnic_cleanup(netdev); 2267 2268 if (reset_state == VNIC_OPEN && 2269 adapter->reset_reason != VNIC_RESET_MOBILITY && 2270 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2271 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2272 rc = __ibmvnic_close(netdev); 2273 if (rc) 2274 goto out; 2275 } else { 2276 adapter->state = VNIC_CLOSING; 2277 2278 /* Release the RTNL lock before link state change and 2279 * re-acquire after the link state change to allow 2280 * linkwatch_event to grab the RTNL lock and run during 2281 * a reset. 2282 */ 2283 rtnl_unlock(); 2284 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2285 rtnl_lock(); 2286 if (rc) 2287 goto out; 2288 2289 if (adapter->state == VNIC_OPEN) { 2290 /* When we dropped rtnl, ibmvnic_open() got 2291 * it and noticed that we are resetting and 2292 * set the adapter state to OPEN. Update our 2293 * new "target" state, and resume the reset 2294 * from VNIC_CLOSING state. 2295 */ 2296 netdev_dbg(netdev, 2297 "Open changed state from %s, updating.\n", 2298 adapter_state_to_string(reset_state)); 2299 reset_state = VNIC_OPEN; 2300 adapter->state = VNIC_CLOSING; 2301 } 2302 2303 if (adapter->state != VNIC_CLOSING) { 2304 /* If someone else changed the adapter state 2305 * when we dropped the rtnl, fail the reset 2306 */ 2307 rc = -1; 2308 goto out; 2309 } 2310 adapter->state = VNIC_CLOSED; 2311 } 2312 } 2313 2314 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2315 release_resources(adapter); 2316 release_sub_crqs(adapter, 1); 2317 release_crq_queue(adapter); 2318 } 2319 2320 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2321 /* remove the closed state so when we call open it appears 2322 * we are coming from the probed state. 2323 */ 2324 adapter->state = VNIC_PROBED; 2325 2326 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2327 rc = init_crq_queue(adapter); 2328 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2329 rc = ibmvnic_reenable_crq_queue(adapter); 2330 release_sub_crqs(adapter, 1); 2331 } else { 2332 rc = ibmvnic_reset_crq(adapter); 2333 if (rc == H_CLOSED || rc == H_SUCCESS) { 2334 rc = vio_enable_interrupts(adapter->vdev); 2335 if (rc) 2336 netdev_err(adapter->netdev, 2337 "Reset failed to enable interrupts. rc=%d\n", 2338 rc); 2339 } 2340 } 2341 2342 if (rc) { 2343 netdev_err(adapter->netdev, 2344 "Reset couldn't initialize crq. rc=%d\n", rc); 2345 goto out; 2346 } 2347 2348 rc = ibmvnic_reset_init(adapter, true); 2349 if (rc) { 2350 rc = IBMVNIC_INIT_FAILED; 2351 goto out; 2352 } 2353 2354 /* If the adapter was in PROBE or DOWN state prior to the reset, 2355 * exit here. 2356 */ 2357 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2358 rc = 0; 2359 goto out; 2360 } 2361 2362 rc = ibmvnic_login(netdev); 2363 if (rc) 2364 goto out; 2365 2366 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2367 rc = init_resources(adapter); 2368 if (rc) 2369 goto out; 2370 } else if (adapter->req_rx_queues != old_num_rx_queues || 2371 adapter->req_tx_queues != old_num_tx_queues || 2372 adapter->req_rx_add_entries_per_subcrq != 2373 old_num_rx_slots || 2374 adapter->req_tx_entries_per_subcrq != 2375 old_num_tx_slots || 2376 !adapter->rx_pool || 2377 !adapter->tso_pool || 2378 !adapter->tx_pool) { 2379 release_napi(adapter); 2380 release_vpd_data(adapter); 2381 2382 rc = init_resources(adapter); 2383 if (rc) 2384 goto out; 2385 2386 } else { 2387 rc = init_tx_pools(netdev); 2388 if (rc) { 2389 netdev_dbg(netdev, 2390 "init tx pools failed (%d)\n", 2391 rc); 2392 goto out; 2393 } 2394 2395 rc = init_rx_pools(netdev); 2396 if (rc) { 2397 netdev_dbg(netdev, 2398 "init rx pools failed (%d)\n", 2399 rc); 2400 goto out; 2401 } 2402 } 2403 ibmvnic_disable_irqs(adapter); 2404 } 2405 adapter->state = VNIC_CLOSED; 2406 2407 if (reset_state == VNIC_CLOSED) { 2408 rc = 0; 2409 goto out; 2410 } 2411 2412 rc = __ibmvnic_open(netdev); 2413 if (rc) { 2414 rc = IBMVNIC_OPEN_FAILED; 2415 goto out; 2416 } 2417 2418 /* refresh device's multicast list */ 2419 ibmvnic_set_multi(netdev); 2420 2421 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2422 adapter->reset_reason == VNIC_RESET_MOBILITY) 2423 __netdev_notify_peers(netdev); 2424 2425 rc = 0; 2426 2427 out: 2428 /* restore the adapter state if reset failed */ 2429 if (rc) 2430 adapter->state = reset_state; 2431 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2432 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2433 rtnl_unlock(); 2434 2435 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2436 adapter_state_to_string(adapter->state), 2437 adapter->failover_pending, rc); 2438 return rc; 2439 } 2440 2441 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2442 struct ibmvnic_rwi *rwi, u32 reset_state) 2443 { 2444 struct net_device *netdev = adapter->netdev; 2445 int rc; 2446 2447 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2448 reset_reason_to_string(rwi->reset_reason)); 2449 2450 /* read the state and check (again) after getting rtnl */ 2451 reset_state = adapter->state; 2452 2453 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2454 rc = -EBUSY; 2455 goto out; 2456 } 2457 2458 netif_carrier_off(netdev); 2459 adapter->reset_reason = rwi->reset_reason; 2460 2461 ibmvnic_cleanup(netdev); 2462 release_resources(adapter); 2463 release_sub_crqs(adapter, 0); 2464 release_crq_queue(adapter); 2465 2466 /* remove the closed state so when we call open it appears 2467 * we are coming from the probed state. 2468 */ 2469 adapter->state = VNIC_PROBED; 2470 2471 reinit_completion(&adapter->init_done); 2472 rc = init_crq_queue(adapter); 2473 if (rc) { 2474 netdev_err(adapter->netdev, 2475 "Couldn't initialize crq. rc=%d\n", rc); 2476 goto out; 2477 } 2478 2479 rc = ibmvnic_reset_init(adapter, false); 2480 if (rc) 2481 goto out; 2482 2483 /* If the adapter was in PROBE or DOWN state prior to the reset, 2484 * exit here. 2485 */ 2486 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2487 goto out; 2488 2489 rc = ibmvnic_login(netdev); 2490 if (rc) 2491 goto out; 2492 2493 rc = init_resources(adapter); 2494 if (rc) 2495 goto out; 2496 2497 ibmvnic_disable_irqs(adapter); 2498 adapter->state = VNIC_CLOSED; 2499 2500 if (reset_state == VNIC_CLOSED) 2501 goto out; 2502 2503 rc = __ibmvnic_open(netdev); 2504 if (rc) { 2505 rc = IBMVNIC_OPEN_FAILED; 2506 goto out; 2507 } 2508 2509 __netdev_notify_peers(netdev); 2510 out: 2511 /* restore adapter state if reset failed */ 2512 if (rc) 2513 adapter->state = reset_state; 2514 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2515 adapter_state_to_string(adapter->state), 2516 adapter->failover_pending, rc); 2517 return rc; 2518 } 2519 2520 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2521 { 2522 struct ibmvnic_rwi *rwi; 2523 unsigned long flags; 2524 2525 spin_lock_irqsave(&adapter->rwi_lock, flags); 2526 2527 if (!list_empty(&adapter->rwi_list)) { 2528 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2529 list); 2530 list_del(&rwi->list); 2531 } else { 2532 rwi = NULL; 2533 } 2534 2535 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2536 return rwi; 2537 } 2538 2539 /** 2540 * do_passive_init - complete probing when partner device is detected. 2541 * @adapter: ibmvnic_adapter struct 2542 * 2543 * If the ibmvnic device does not have a partner device to communicate with at boot 2544 * and that partner device comes online at a later time, this function is called 2545 * to complete the initialization process of ibmvnic device. 2546 * Caller is expected to hold rtnl_lock(). 2547 * 2548 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2549 * in the down state. 2550 * Returns 0 upon success and the device is in PROBED state. 2551 */ 2552 2553 static int do_passive_init(struct ibmvnic_adapter *adapter) 2554 { 2555 unsigned long timeout = msecs_to_jiffies(30000); 2556 struct net_device *netdev = adapter->netdev; 2557 struct device *dev = &adapter->vdev->dev; 2558 int rc; 2559 2560 netdev_dbg(netdev, "Partner device found, probing.\n"); 2561 2562 adapter->state = VNIC_PROBING; 2563 reinit_completion(&adapter->init_done); 2564 adapter->init_done_rc = 0; 2565 adapter->crq.active = true; 2566 2567 rc = send_crq_init_complete(adapter); 2568 if (rc) 2569 goto out; 2570 2571 rc = send_version_xchg(adapter); 2572 if (rc) 2573 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2574 2575 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2576 dev_err(dev, "Initialization sequence timed out\n"); 2577 rc = -ETIMEDOUT; 2578 goto out; 2579 } 2580 2581 rc = init_sub_crqs(adapter); 2582 if (rc) { 2583 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2584 goto out; 2585 } 2586 2587 rc = init_sub_crq_irqs(adapter); 2588 if (rc) { 2589 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2590 goto init_failed; 2591 } 2592 2593 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2594 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2595 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2596 2597 adapter->state = VNIC_PROBED; 2598 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2599 2600 return 0; 2601 2602 init_failed: 2603 release_sub_crqs(adapter, 1); 2604 out: 2605 adapter->state = VNIC_DOWN; 2606 return rc; 2607 } 2608 2609 static void __ibmvnic_reset(struct work_struct *work) 2610 { 2611 struct ibmvnic_adapter *adapter; 2612 bool saved_state = false; 2613 struct ibmvnic_rwi *tmprwi; 2614 struct ibmvnic_rwi *rwi; 2615 unsigned long flags; 2616 u32 reset_state; 2617 int rc = 0; 2618 2619 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2620 2621 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2622 queue_delayed_work(system_long_wq, 2623 &adapter->ibmvnic_delayed_reset, 2624 IBMVNIC_RESET_DELAY); 2625 return; 2626 } 2627 2628 rwi = get_next_rwi(adapter); 2629 while (rwi) { 2630 spin_lock_irqsave(&adapter->state_lock, flags); 2631 2632 if (adapter->state == VNIC_REMOVING || 2633 adapter->state == VNIC_REMOVED) { 2634 spin_unlock_irqrestore(&adapter->state_lock, flags); 2635 kfree(rwi); 2636 rc = EBUSY; 2637 break; 2638 } 2639 2640 if (!saved_state) { 2641 reset_state = adapter->state; 2642 saved_state = true; 2643 } 2644 spin_unlock_irqrestore(&adapter->state_lock, flags); 2645 2646 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2647 rtnl_lock(); 2648 rc = do_passive_init(adapter); 2649 rtnl_unlock(); 2650 if (!rc) 2651 netif_carrier_on(adapter->netdev); 2652 } else if (adapter->force_reset_recovery) { 2653 /* Since we are doing a hard reset now, clear the 2654 * failover_pending flag so we don't ignore any 2655 * future MOBILITY or other resets. 2656 */ 2657 adapter->failover_pending = false; 2658 2659 /* Transport event occurred during previous reset */ 2660 if (adapter->wait_for_reset) { 2661 /* Previous was CHANGE_PARAM; caller locked */ 2662 adapter->force_reset_recovery = false; 2663 rc = do_hard_reset(adapter, rwi, reset_state); 2664 } else { 2665 rtnl_lock(); 2666 adapter->force_reset_recovery = false; 2667 rc = do_hard_reset(adapter, rwi, reset_state); 2668 rtnl_unlock(); 2669 } 2670 if (rc) { 2671 /* give backing device time to settle down */ 2672 netdev_dbg(adapter->netdev, 2673 "[S:%s] Hard reset failed, waiting 60 secs\n", 2674 adapter_state_to_string(adapter->state)); 2675 set_current_state(TASK_UNINTERRUPTIBLE); 2676 schedule_timeout(60 * HZ); 2677 } 2678 } else { 2679 rc = do_reset(adapter, rwi, reset_state); 2680 } 2681 tmprwi = rwi; 2682 adapter->last_reset_time = jiffies; 2683 2684 if (rc) 2685 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2686 2687 rwi = get_next_rwi(adapter); 2688 2689 /* 2690 * If there is another reset queued, free the previous rwi 2691 * and process the new reset even if previous reset failed 2692 * (the previous reset could have failed because of a fail 2693 * over for instance, so process the fail over). 2694 * 2695 * If there are no resets queued and the previous reset failed, 2696 * the adapter would be in an undefined state. So retry the 2697 * previous reset as a hard reset. 2698 */ 2699 if (rwi) 2700 kfree(tmprwi); 2701 else if (rc) 2702 rwi = tmprwi; 2703 2704 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2705 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2706 adapter->force_reset_recovery = true; 2707 } 2708 2709 if (adapter->wait_for_reset) { 2710 adapter->reset_done_rc = rc; 2711 complete(&adapter->reset_done); 2712 } 2713 2714 clear_bit_unlock(0, &adapter->resetting); 2715 2716 netdev_dbg(adapter->netdev, 2717 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2718 adapter_state_to_string(adapter->state), 2719 adapter->force_reset_recovery, 2720 adapter->wait_for_reset); 2721 } 2722 2723 static void __ibmvnic_delayed_reset(struct work_struct *work) 2724 { 2725 struct ibmvnic_adapter *adapter; 2726 2727 adapter = container_of(work, struct ibmvnic_adapter, 2728 ibmvnic_delayed_reset.work); 2729 __ibmvnic_reset(&adapter->ibmvnic_reset); 2730 } 2731 2732 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2733 enum ibmvnic_reset_reason reason) 2734 { 2735 struct list_head *entry, *tmp_entry; 2736 struct ibmvnic_rwi *rwi, *tmp; 2737 struct net_device *netdev = adapter->netdev; 2738 unsigned long flags; 2739 int ret; 2740 2741 spin_lock_irqsave(&adapter->rwi_lock, flags); 2742 2743 /* If failover is pending don't schedule any other reset. 2744 * Instead let the failover complete. If there is already a 2745 * a failover reset scheduled, we will detect and drop the 2746 * duplicate reset when walking the ->rwi_list below. 2747 */ 2748 if (adapter->state == VNIC_REMOVING || 2749 adapter->state == VNIC_REMOVED || 2750 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2751 ret = EBUSY; 2752 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2753 goto err; 2754 } 2755 2756 if (adapter->state == VNIC_PROBING) { 2757 netdev_warn(netdev, "Adapter reset during probe\n"); 2758 adapter->init_done_rc = -EAGAIN; 2759 ret = EAGAIN; 2760 goto err; 2761 } 2762 2763 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2764 if (tmp->reset_reason == reason) { 2765 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2766 reset_reason_to_string(reason)); 2767 ret = EBUSY; 2768 goto err; 2769 } 2770 } 2771 2772 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2773 if (!rwi) { 2774 ret = ENOMEM; 2775 goto err; 2776 } 2777 /* if we just received a transport event, 2778 * flush reset queue and process this reset 2779 */ 2780 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2781 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2782 list_del(entry); 2783 } 2784 rwi->reset_reason = reason; 2785 list_add_tail(&rwi->list, &adapter->rwi_list); 2786 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2787 reset_reason_to_string(reason)); 2788 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2789 2790 ret = 0; 2791 err: 2792 /* ibmvnic_close() below can block, so drop the lock first */ 2793 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2794 2795 if (ret == ENOMEM) 2796 ibmvnic_close(netdev); 2797 2798 return -ret; 2799 } 2800 2801 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2802 { 2803 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2804 2805 if (test_bit(0, &adapter->resetting)) { 2806 netdev_err(adapter->netdev, 2807 "Adapter is resetting, skip timeout reset\n"); 2808 return; 2809 } 2810 /* No queuing up reset until at least 5 seconds (default watchdog val) 2811 * after last reset 2812 */ 2813 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2814 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2815 return; 2816 } 2817 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2818 } 2819 2820 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2821 struct ibmvnic_rx_buff *rx_buff) 2822 { 2823 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2824 2825 rx_buff->skb = NULL; 2826 2827 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2828 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2829 2830 atomic_dec(&pool->available); 2831 } 2832 2833 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2834 { 2835 struct ibmvnic_sub_crq_queue *rx_scrq; 2836 struct ibmvnic_adapter *adapter; 2837 struct net_device *netdev; 2838 int frames_processed; 2839 int scrq_num; 2840 2841 netdev = napi->dev; 2842 adapter = netdev_priv(netdev); 2843 scrq_num = (int)(napi - adapter->napi); 2844 frames_processed = 0; 2845 rx_scrq = adapter->rx_scrq[scrq_num]; 2846 2847 restart_poll: 2848 while (frames_processed < budget) { 2849 struct sk_buff *skb; 2850 struct ibmvnic_rx_buff *rx_buff; 2851 union sub_crq *next; 2852 u32 length; 2853 u16 offset; 2854 u8 flags = 0; 2855 2856 if (unlikely(test_bit(0, &adapter->resetting) && 2857 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2858 enable_scrq_irq(adapter, rx_scrq); 2859 napi_complete_done(napi, frames_processed); 2860 return frames_processed; 2861 } 2862 2863 if (!pending_scrq(adapter, rx_scrq)) 2864 break; 2865 next = ibmvnic_next_scrq(adapter, rx_scrq); 2866 rx_buff = (struct ibmvnic_rx_buff *) 2867 be64_to_cpu(next->rx_comp.correlator); 2868 /* do error checking */ 2869 if (next->rx_comp.rc) { 2870 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2871 be16_to_cpu(next->rx_comp.rc)); 2872 /* free the entry */ 2873 next->rx_comp.first = 0; 2874 dev_kfree_skb_any(rx_buff->skb); 2875 remove_buff_from_pool(adapter, rx_buff); 2876 continue; 2877 } else if (!rx_buff->skb) { 2878 /* free the entry */ 2879 next->rx_comp.first = 0; 2880 remove_buff_from_pool(adapter, rx_buff); 2881 continue; 2882 } 2883 2884 length = be32_to_cpu(next->rx_comp.len); 2885 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2886 flags = next->rx_comp.flags; 2887 skb = rx_buff->skb; 2888 /* load long_term_buff before copying to skb */ 2889 dma_rmb(); 2890 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2891 length); 2892 2893 /* VLAN Header has been stripped by the system firmware and 2894 * needs to be inserted by the driver 2895 */ 2896 if (adapter->rx_vlan_header_insertion && 2897 (flags & IBMVNIC_VLAN_STRIPPED)) 2898 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2899 ntohs(next->rx_comp.vlan_tci)); 2900 2901 /* free the entry */ 2902 next->rx_comp.first = 0; 2903 remove_buff_from_pool(adapter, rx_buff); 2904 2905 skb_put(skb, length); 2906 skb->protocol = eth_type_trans(skb, netdev); 2907 skb_record_rx_queue(skb, scrq_num); 2908 2909 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2910 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2911 skb->ip_summed = CHECKSUM_UNNECESSARY; 2912 } 2913 2914 length = skb->len; 2915 napi_gro_receive(napi, skb); /* send it up */ 2916 netdev->stats.rx_packets++; 2917 netdev->stats.rx_bytes += length; 2918 adapter->rx_stats_buffers[scrq_num].packets++; 2919 adapter->rx_stats_buffers[scrq_num].bytes += length; 2920 frames_processed++; 2921 } 2922 2923 if (adapter->state != VNIC_CLOSING && 2924 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2925 adapter->req_rx_add_entries_per_subcrq / 2) || 2926 frames_processed < budget)) 2927 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2928 if (frames_processed < budget) { 2929 if (napi_complete_done(napi, frames_processed)) { 2930 enable_scrq_irq(adapter, rx_scrq); 2931 if (pending_scrq(adapter, rx_scrq)) { 2932 if (napi_reschedule(napi)) { 2933 disable_scrq_irq(adapter, rx_scrq); 2934 goto restart_poll; 2935 } 2936 } 2937 } 2938 } 2939 return frames_processed; 2940 } 2941 2942 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2943 { 2944 int rc, ret; 2945 2946 adapter->fallback.mtu = adapter->req_mtu; 2947 adapter->fallback.rx_queues = adapter->req_rx_queues; 2948 adapter->fallback.tx_queues = adapter->req_tx_queues; 2949 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2950 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2951 2952 reinit_completion(&adapter->reset_done); 2953 adapter->wait_for_reset = true; 2954 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2955 2956 if (rc) { 2957 ret = rc; 2958 goto out; 2959 } 2960 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2961 if (rc) { 2962 ret = -ENODEV; 2963 goto out; 2964 } 2965 2966 ret = 0; 2967 if (adapter->reset_done_rc) { 2968 ret = -EIO; 2969 adapter->desired.mtu = adapter->fallback.mtu; 2970 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2971 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2972 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2973 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2974 2975 reinit_completion(&adapter->reset_done); 2976 adapter->wait_for_reset = true; 2977 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2978 if (rc) { 2979 ret = rc; 2980 goto out; 2981 } 2982 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2983 60000); 2984 if (rc) { 2985 ret = -ENODEV; 2986 goto out; 2987 } 2988 } 2989 out: 2990 adapter->wait_for_reset = false; 2991 2992 return ret; 2993 } 2994 2995 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2996 { 2997 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2998 2999 adapter->desired.mtu = new_mtu + ETH_HLEN; 3000 3001 return wait_for_reset(adapter); 3002 } 3003 3004 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3005 struct net_device *dev, 3006 netdev_features_t features) 3007 { 3008 /* Some backing hardware adapters can not 3009 * handle packets with a MSS less than 224 3010 * or with only one segment. 3011 */ 3012 if (skb_is_gso(skb)) { 3013 if (skb_shinfo(skb)->gso_size < 224 || 3014 skb_shinfo(skb)->gso_segs == 1) 3015 features &= ~NETIF_F_GSO_MASK; 3016 } 3017 3018 return features; 3019 } 3020 3021 static const struct net_device_ops ibmvnic_netdev_ops = { 3022 .ndo_open = ibmvnic_open, 3023 .ndo_stop = ibmvnic_close, 3024 .ndo_start_xmit = ibmvnic_xmit, 3025 .ndo_set_rx_mode = ibmvnic_set_multi, 3026 .ndo_set_mac_address = ibmvnic_set_mac, 3027 .ndo_validate_addr = eth_validate_addr, 3028 .ndo_tx_timeout = ibmvnic_tx_timeout, 3029 .ndo_change_mtu = ibmvnic_change_mtu, 3030 .ndo_features_check = ibmvnic_features_check, 3031 }; 3032 3033 /* ethtool functions */ 3034 3035 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3036 struct ethtool_link_ksettings *cmd) 3037 { 3038 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3039 int rc; 3040 3041 rc = send_query_phys_parms(adapter); 3042 if (rc) { 3043 adapter->speed = SPEED_UNKNOWN; 3044 adapter->duplex = DUPLEX_UNKNOWN; 3045 } 3046 cmd->base.speed = adapter->speed; 3047 cmd->base.duplex = adapter->duplex; 3048 cmd->base.port = PORT_FIBRE; 3049 cmd->base.phy_address = 0; 3050 cmd->base.autoneg = AUTONEG_ENABLE; 3051 3052 return 0; 3053 } 3054 3055 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3056 struct ethtool_drvinfo *info) 3057 { 3058 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3059 3060 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3061 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3062 strscpy(info->fw_version, adapter->fw_version, 3063 sizeof(info->fw_version)); 3064 } 3065 3066 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3067 { 3068 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3069 3070 return adapter->msg_enable; 3071 } 3072 3073 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3074 { 3075 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3076 3077 adapter->msg_enable = data; 3078 } 3079 3080 static u32 ibmvnic_get_link(struct net_device *netdev) 3081 { 3082 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3083 3084 /* Don't need to send a query because we request a logical link up at 3085 * init and then we wait for link state indications 3086 */ 3087 return adapter->logical_link_state; 3088 } 3089 3090 static void ibmvnic_get_ringparam(struct net_device *netdev, 3091 struct ethtool_ringparam *ring) 3092 { 3093 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3094 3095 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3096 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3097 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3098 } else { 3099 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3100 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3101 } 3102 ring->rx_mini_max_pending = 0; 3103 ring->rx_jumbo_max_pending = 0; 3104 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3105 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3106 ring->rx_mini_pending = 0; 3107 ring->rx_jumbo_pending = 0; 3108 } 3109 3110 static int ibmvnic_set_ringparam(struct net_device *netdev, 3111 struct ethtool_ringparam *ring) 3112 { 3113 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3114 int ret; 3115 3116 ret = 0; 3117 adapter->desired.rx_entries = ring->rx_pending; 3118 adapter->desired.tx_entries = ring->tx_pending; 3119 3120 ret = wait_for_reset(adapter); 3121 3122 if (!ret && 3123 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 3124 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 3125 netdev_info(netdev, 3126 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3127 ring->rx_pending, ring->tx_pending, 3128 adapter->req_rx_add_entries_per_subcrq, 3129 adapter->req_tx_entries_per_subcrq); 3130 return ret; 3131 } 3132 3133 static void ibmvnic_get_channels(struct net_device *netdev, 3134 struct ethtool_channels *channels) 3135 { 3136 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3137 3138 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3139 channels->max_rx = adapter->max_rx_queues; 3140 channels->max_tx = adapter->max_tx_queues; 3141 } else { 3142 channels->max_rx = IBMVNIC_MAX_QUEUES; 3143 channels->max_tx = IBMVNIC_MAX_QUEUES; 3144 } 3145 3146 channels->max_other = 0; 3147 channels->max_combined = 0; 3148 channels->rx_count = adapter->req_rx_queues; 3149 channels->tx_count = adapter->req_tx_queues; 3150 channels->other_count = 0; 3151 channels->combined_count = 0; 3152 } 3153 3154 static int ibmvnic_set_channels(struct net_device *netdev, 3155 struct ethtool_channels *channels) 3156 { 3157 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3158 int ret; 3159 3160 ret = 0; 3161 adapter->desired.rx_queues = channels->rx_count; 3162 adapter->desired.tx_queues = channels->tx_count; 3163 3164 ret = wait_for_reset(adapter); 3165 3166 if (!ret && 3167 (adapter->req_rx_queues != channels->rx_count || 3168 adapter->req_tx_queues != channels->tx_count)) 3169 netdev_info(netdev, 3170 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3171 channels->rx_count, channels->tx_count, 3172 adapter->req_rx_queues, adapter->req_tx_queues); 3173 return ret; 3174 } 3175 3176 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3177 { 3178 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3179 int i; 3180 3181 switch (stringset) { 3182 case ETH_SS_STATS: 3183 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 3184 i++, data += ETH_GSTRING_LEN) 3185 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3186 3187 for (i = 0; i < adapter->req_tx_queues; i++) { 3188 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3189 data += ETH_GSTRING_LEN; 3190 3191 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3192 data += ETH_GSTRING_LEN; 3193 3194 snprintf(data, ETH_GSTRING_LEN, 3195 "tx%d_dropped_packets", i); 3196 data += ETH_GSTRING_LEN; 3197 } 3198 3199 for (i = 0; i < adapter->req_rx_queues; i++) { 3200 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3201 data += ETH_GSTRING_LEN; 3202 3203 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3204 data += ETH_GSTRING_LEN; 3205 3206 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3207 data += ETH_GSTRING_LEN; 3208 } 3209 break; 3210 3211 case ETH_SS_PRIV_FLAGS: 3212 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3213 strcpy(data + i * ETH_GSTRING_LEN, 3214 ibmvnic_priv_flags[i]); 3215 break; 3216 default: 3217 return; 3218 } 3219 } 3220 3221 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3222 { 3223 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3224 3225 switch (sset) { 3226 case ETH_SS_STATS: 3227 return ARRAY_SIZE(ibmvnic_stats) + 3228 adapter->req_tx_queues * NUM_TX_STATS + 3229 adapter->req_rx_queues * NUM_RX_STATS; 3230 case ETH_SS_PRIV_FLAGS: 3231 return ARRAY_SIZE(ibmvnic_priv_flags); 3232 default: 3233 return -EOPNOTSUPP; 3234 } 3235 } 3236 3237 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3238 struct ethtool_stats *stats, u64 *data) 3239 { 3240 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3241 union ibmvnic_crq crq; 3242 int i, j; 3243 int rc; 3244 3245 memset(&crq, 0, sizeof(crq)); 3246 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3247 crq.request_statistics.cmd = REQUEST_STATISTICS; 3248 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3249 crq.request_statistics.len = 3250 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3251 3252 /* Wait for data to be written */ 3253 reinit_completion(&adapter->stats_done); 3254 rc = ibmvnic_send_crq(adapter, &crq); 3255 if (rc) 3256 return; 3257 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3258 if (rc) 3259 return; 3260 3261 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3262 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3263 (adapter, ibmvnic_stats[i].offset)); 3264 3265 for (j = 0; j < adapter->req_tx_queues; j++) { 3266 data[i] = adapter->tx_stats_buffers[j].packets; 3267 i++; 3268 data[i] = adapter->tx_stats_buffers[j].bytes; 3269 i++; 3270 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3271 i++; 3272 } 3273 3274 for (j = 0; j < adapter->req_rx_queues; j++) { 3275 data[i] = adapter->rx_stats_buffers[j].packets; 3276 i++; 3277 data[i] = adapter->rx_stats_buffers[j].bytes; 3278 i++; 3279 data[i] = adapter->rx_stats_buffers[j].interrupts; 3280 i++; 3281 } 3282 } 3283 3284 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3285 { 3286 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3287 3288 return adapter->priv_flags; 3289 } 3290 3291 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3292 { 3293 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3294 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3295 3296 if (which_maxes) 3297 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3298 else 3299 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3300 3301 return 0; 3302 } 3303 3304 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3305 .get_drvinfo = ibmvnic_get_drvinfo, 3306 .get_msglevel = ibmvnic_get_msglevel, 3307 .set_msglevel = ibmvnic_set_msglevel, 3308 .get_link = ibmvnic_get_link, 3309 .get_ringparam = ibmvnic_get_ringparam, 3310 .set_ringparam = ibmvnic_set_ringparam, 3311 .get_channels = ibmvnic_get_channels, 3312 .set_channels = ibmvnic_set_channels, 3313 .get_strings = ibmvnic_get_strings, 3314 .get_sset_count = ibmvnic_get_sset_count, 3315 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3316 .get_link_ksettings = ibmvnic_get_link_ksettings, 3317 .get_priv_flags = ibmvnic_get_priv_flags, 3318 .set_priv_flags = ibmvnic_set_priv_flags, 3319 }; 3320 3321 /* Routines for managing CRQs/sCRQs */ 3322 3323 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3324 struct ibmvnic_sub_crq_queue *scrq) 3325 { 3326 int rc; 3327 3328 if (!scrq) { 3329 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3330 return -EINVAL; 3331 } 3332 3333 if (scrq->irq) { 3334 free_irq(scrq->irq, scrq); 3335 irq_dispose_mapping(scrq->irq); 3336 scrq->irq = 0; 3337 } 3338 3339 if (scrq->msgs) { 3340 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3341 atomic_set(&scrq->used, 0); 3342 scrq->cur = 0; 3343 scrq->ind_buf.index = 0; 3344 } else { 3345 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3346 return -EINVAL; 3347 } 3348 3349 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3350 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3351 return rc; 3352 } 3353 3354 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3355 { 3356 int i, rc; 3357 3358 if (!adapter->tx_scrq || !adapter->rx_scrq) 3359 return -EINVAL; 3360 3361 for (i = 0; i < adapter->req_tx_queues; i++) { 3362 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3363 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3364 if (rc) 3365 return rc; 3366 } 3367 3368 for (i = 0; i < adapter->req_rx_queues; i++) { 3369 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3370 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3371 if (rc) 3372 return rc; 3373 } 3374 3375 return rc; 3376 } 3377 3378 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3379 struct ibmvnic_sub_crq_queue *scrq, 3380 bool do_h_free) 3381 { 3382 struct device *dev = &adapter->vdev->dev; 3383 long rc; 3384 3385 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3386 3387 if (do_h_free) { 3388 /* Close the sub-crqs */ 3389 do { 3390 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3391 adapter->vdev->unit_address, 3392 scrq->crq_num); 3393 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3394 3395 if (rc) { 3396 netdev_err(adapter->netdev, 3397 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3398 scrq->crq_num, rc); 3399 } 3400 } 3401 3402 dma_free_coherent(dev, 3403 IBMVNIC_IND_ARR_SZ, 3404 scrq->ind_buf.indir_arr, 3405 scrq->ind_buf.indir_dma); 3406 3407 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3408 DMA_BIDIRECTIONAL); 3409 free_pages((unsigned long)scrq->msgs, 2); 3410 kfree(scrq); 3411 } 3412 3413 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3414 *adapter) 3415 { 3416 struct device *dev = &adapter->vdev->dev; 3417 struct ibmvnic_sub_crq_queue *scrq; 3418 int rc; 3419 3420 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3421 if (!scrq) 3422 return NULL; 3423 3424 scrq->msgs = 3425 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3426 if (!scrq->msgs) { 3427 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3428 goto zero_page_failed; 3429 } 3430 3431 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3432 DMA_BIDIRECTIONAL); 3433 if (dma_mapping_error(dev, scrq->msg_token)) { 3434 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3435 goto map_failed; 3436 } 3437 3438 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3439 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3440 3441 if (rc == H_RESOURCE) 3442 rc = ibmvnic_reset_crq(adapter); 3443 3444 if (rc == H_CLOSED) { 3445 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3446 } else if (rc) { 3447 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3448 goto reg_failed; 3449 } 3450 3451 scrq->adapter = adapter; 3452 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3453 scrq->ind_buf.index = 0; 3454 3455 scrq->ind_buf.indir_arr = 3456 dma_alloc_coherent(dev, 3457 IBMVNIC_IND_ARR_SZ, 3458 &scrq->ind_buf.indir_dma, 3459 GFP_KERNEL); 3460 3461 if (!scrq->ind_buf.indir_arr) 3462 goto indir_failed; 3463 3464 spin_lock_init(&scrq->lock); 3465 3466 netdev_dbg(adapter->netdev, 3467 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3468 scrq->crq_num, scrq->hw_irq, scrq->irq); 3469 3470 return scrq; 3471 3472 indir_failed: 3473 do { 3474 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3475 adapter->vdev->unit_address, 3476 scrq->crq_num); 3477 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3478 reg_failed: 3479 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3480 DMA_BIDIRECTIONAL); 3481 map_failed: 3482 free_pages((unsigned long)scrq->msgs, 2); 3483 zero_page_failed: 3484 kfree(scrq); 3485 3486 return NULL; 3487 } 3488 3489 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3490 { 3491 int i; 3492 3493 if (adapter->tx_scrq) { 3494 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3495 if (!adapter->tx_scrq[i]) 3496 continue; 3497 3498 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3499 i); 3500 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3501 if (adapter->tx_scrq[i]->irq) { 3502 free_irq(adapter->tx_scrq[i]->irq, 3503 adapter->tx_scrq[i]); 3504 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3505 adapter->tx_scrq[i]->irq = 0; 3506 } 3507 3508 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3509 do_h_free); 3510 } 3511 3512 kfree(adapter->tx_scrq); 3513 adapter->tx_scrq = NULL; 3514 adapter->num_active_tx_scrqs = 0; 3515 } 3516 3517 if (adapter->rx_scrq) { 3518 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3519 if (!adapter->rx_scrq[i]) 3520 continue; 3521 3522 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3523 i); 3524 if (adapter->rx_scrq[i]->irq) { 3525 free_irq(adapter->rx_scrq[i]->irq, 3526 adapter->rx_scrq[i]); 3527 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3528 adapter->rx_scrq[i]->irq = 0; 3529 } 3530 3531 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3532 do_h_free); 3533 } 3534 3535 kfree(adapter->rx_scrq); 3536 adapter->rx_scrq = NULL; 3537 adapter->num_active_rx_scrqs = 0; 3538 } 3539 } 3540 3541 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3542 struct ibmvnic_sub_crq_queue *scrq) 3543 { 3544 struct device *dev = &adapter->vdev->dev; 3545 unsigned long rc; 3546 3547 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3548 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3549 if (rc) 3550 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3551 scrq->hw_irq, rc); 3552 return rc; 3553 } 3554 3555 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3556 struct ibmvnic_sub_crq_queue *scrq) 3557 { 3558 struct device *dev = &adapter->vdev->dev; 3559 unsigned long rc; 3560 3561 if (scrq->hw_irq > 0x100000000ULL) { 3562 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3563 return 1; 3564 } 3565 3566 if (test_bit(0, &adapter->resetting) && 3567 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3568 u64 val = (0xff000000) | scrq->hw_irq; 3569 3570 rc = plpar_hcall_norets(H_EOI, val); 3571 /* H_EOI would fail with rc = H_FUNCTION when running 3572 * in XIVE mode which is expected, but not an error. 3573 */ 3574 if (rc && (rc != H_FUNCTION)) 3575 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3576 val, rc); 3577 } 3578 3579 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3580 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3581 if (rc) 3582 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3583 scrq->hw_irq, rc); 3584 return rc; 3585 } 3586 3587 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3588 struct ibmvnic_sub_crq_queue *scrq) 3589 { 3590 struct device *dev = &adapter->vdev->dev; 3591 struct ibmvnic_tx_pool *tx_pool; 3592 struct ibmvnic_tx_buff *txbuff; 3593 struct netdev_queue *txq; 3594 union sub_crq *next; 3595 int index; 3596 int i; 3597 3598 restart_loop: 3599 while (pending_scrq(adapter, scrq)) { 3600 unsigned int pool = scrq->pool_index; 3601 int num_entries = 0; 3602 int total_bytes = 0; 3603 int num_packets = 0; 3604 3605 next = ibmvnic_next_scrq(adapter, scrq); 3606 for (i = 0; i < next->tx_comp.num_comps; i++) { 3607 index = be32_to_cpu(next->tx_comp.correlators[i]); 3608 if (index & IBMVNIC_TSO_POOL_MASK) { 3609 tx_pool = &adapter->tso_pool[pool]; 3610 index &= ~IBMVNIC_TSO_POOL_MASK; 3611 } else { 3612 tx_pool = &adapter->tx_pool[pool]; 3613 } 3614 3615 txbuff = &tx_pool->tx_buff[index]; 3616 num_packets++; 3617 num_entries += txbuff->num_entries; 3618 if (txbuff->skb) { 3619 total_bytes += txbuff->skb->len; 3620 if (next->tx_comp.rcs[i]) { 3621 dev_err(dev, "tx error %x\n", 3622 next->tx_comp.rcs[i]); 3623 dev_kfree_skb_irq(txbuff->skb); 3624 } else { 3625 dev_consume_skb_irq(txbuff->skb); 3626 } 3627 txbuff->skb = NULL; 3628 } else { 3629 netdev_warn(adapter->netdev, 3630 "TX completion received with NULL socket buffer\n"); 3631 } 3632 tx_pool->free_map[tx_pool->producer_index] = index; 3633 tx_pool->producer_index = 3634 (tx_pool->producer_index + 1) % 3635 tx_pool->num_buffers; 3636 } 3637 /* remove tx_comp scrq*/ 3638 next->tx_comp.first = 0; 3639 3640 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3641 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3642 3643 if (atomic_sub_return(num_entries, &scrq->used) <= 3644 (adapter->req_tx_entries_per_subcrq / 2) && 3645 __netif_subqueue_stopped(adapter->netdev, 3646 scrq->pool_index)) { 3647 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3648 netdev_dbg(adapter->netdev, "Started queue %d\n", 3649 scrq->pool_index); 3650 } 3651 } 3652 3653 enable_scrq_irq(adapter, scrq); 3654 3655 if (pending_scrq(adapter, scrq)) { 3656 disable_scrq_irq(adapter, scrq); 3657 goto restart_loop; 3658 } 3659 3660 return 0; 3661 } 3662 3663 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3664 { 3665 struct ibmvnic_sub_crq_queue *scrq = instance; 3666 struct ibmvnic_adapter *adapter = scrq->adapter; 3667 3668 disable_scrq_irq(adapter, scrq); 3669 ibmvnic_complete_tx(adapter, scrq); 3670 3671 return IRQ_HANDLED; 3672 } 3673 3674 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3675 { 3676 struct ibmvnic_sub_crq_queue *scrq = instance; 3677 struct ibmvnic_adapter *adapter = scrq->adapter; 3678 3679 /* When booting a kdump kernel we can hit pending interrupts 3680 * prior to completing driver initialization. 3681 */ 3682 if (unlikely(adapter->state != VNIC_OPEN)) 3683 return IRQ_NONE; 3684 3685 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3686 3687 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3688 disable_scrq_irq(adapter, scrq); 3689 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3690 } 3691 3692 return IRQ_HANDLED; 3693 } 3694 3695 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3696 { 3697 struct device *dev = &adapter->vdev->dev; 3698 struct ibmvnic_sub_crq_queue *scrq; 3699 int i = 0, j = 0; 3700 int rc = 0; 3701 3702 for (i = 0; i < adapter->req_tx_queues; i++) { 3703 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3704 i); 3705 scrq = adapter->tx_scrq[i]; 3706 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3707 3708 if (!scrq->irq) { 3709 rc = -EINVAL; 3710 dev_err(dev, "Error mapping irq\n"); 3711 goto req_tx_irq_failed; 3712 } 3713 3714 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3715 adapter->vdev->unit_address, i); 3716 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3717 0, scrq->name, scrq); 3718 3719 if (rc) { 3720 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3721 scrq->irq, rc); 3722 irq_dispose_mapping(scrq->irq); 3723 goto req_tx_irq_failed; 3724 } 3725 } 3726 3727 for (i = 0; i < adapter->req_rx_queues; i++) { 3728 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3729 i); 3730 scrq = adapter->rx_scrq[i]; 3731 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3732 if (!scrq->irq) { 3733 rc = -EINVAL; 3734 dev_err(dev, "Error mapping irq\n"); 3735 goto req_rx_irq_failed; 3736 } 3737 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3738 adapter->vdev->unit_address, i); 3739 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3740 0, scrq->name, scrq); 3741 if (rc) { 3742 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3743 scrq->irq, rc); 3744 irq_dispose_mapping(scrq->irq); 3745 goto req_rx_irq_failed; 3746 } 3747 } 3748 return rc; 3749 3750 req_rx_irq_failed: 3751 for (j = 0; j < i; j++) { 3752 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3753 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3754 } 3755 i = adapter->req_tx_queues; 3756 req_tx_irq_failed: 3757 for (j = 0; j < i; j++) { 3758 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3759 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3760 } 3761 release_sub_crqs(adapter, 1); 3762 return rc; 3763 } 3764 3765 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3766 { 3767 struct device *dev = &adapter->vdev->dev; 3768 struct ibmvnic_sub_crq_queue **allqueues; 3769 int registered_queues = 0; 3770 int total_queues; 3771 int more = 0; 3772 int i; 3773 3774 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3775 3776 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3777 if (!allqueues) 3778 return -1; 3779 3780 for (i = 0; i < total_queues; i++) { 3781 allqueues[i] = init_sub_crq_queue(adapter); 3782 if (!allqueues[i]) { 3783 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3784 break; 3785 } 3786 registered_queues++; 3787 } 3788 3789 /* Make sure we were able to register the minimum number of queues */ 3790 if (registered_queues < 3791 adapter->min_tx_queues + adapter->min_rx_queues) { 3792 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3793 goto tx_failed; 3794 } 3795 3796 /* Distribute the failed allocated queues*/ 3797 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3798 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3799 switch (i % 3) { 3800 case 0: 3801 if (adapter->req_rx_queues > adapter->min_rx_queues) 3802 adapter->req_rx_queues--; 3803 else 3804 more++; 3805 break; 3806 case 1: 3807 if (adapter->req_tx_queues > adapter->min_tx_queues) 3808 adapter->req_tx_queues--; 3809 else 3810 more++; 3811 break; 3812 } 3813 } 3814 3815 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3816 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3817 if (!adapter->tx_scrq) 3818 goto tx_failed; 3819 3820 for (i = 0; i < adapter->req_tx_queues; i++) { 3821 adapter->tx_scrq[i] = allqueues[i]; 3822 adapter->tx_scrq[i]->pool_index = i; 3823 adapter->num_active_tx_scrqs++; 3824 } 3825 3826 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3827 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3828 if (!adapter->rx_scrq) 3829 goto rx_failed; 3830 3831 for (i = 0; i < adapter->req_rx_queues; i++) { 3832 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3833 adapter->rx_scrq[i]->scrq_num = i; 3834 adapter->num_active_rx_scrqs++; 3835 } 3836 3837 kfree(allqueues); 3838 return 0; 3839 3840 rx_failed: 3841 kfree(adapter->tx_scrq); 3842 adapter->tx_scrq = NULL; 3843 tx_failed: 3844 for (i = 0; i < registered_queues; i++) 3845 release_sub_crq_queue(adapter, allqueues[i], 1); 3846 kfree(allqueues); 3847 return -1; 3848 } 3849 3850 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3851 { 3852 struct device *dev = &adapter->vdev->dev; 3853 union ibmvnic_crq crq; 3854 int max_entries; 3855 3856 if (!retry) { 3857 /* Sub-CRQ entries are 32 byte long */ 3858 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3859 3860 if (adapter->min_tx_entries_per_subcrq > entries_page || 3861 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3862 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3863 return; 3864 } 3865 3866 if (adapter->desired.mtu) 3867 adapter->req_mtu = adapter->desired.mtu; 3868 else 3869 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3870 3871 if (!adapter->desired.tx_entries) 3872 adapter->desired.tx_entries = 3873 adapter->max_tx_entries_per_subcrq; 3874 if (!adapter->desired.rx_entries) 3875 adapter->desired.rx_entries = 3876 adapter->max_rx_add_entries_per_subcrq; 3877 3878 max_entries = IBMVNIC_MAX_LTB_SIZE / 3879 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3880 3881 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3882 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3883 adapter->desired.tx_entries = max_entries; 3884 } 3885 3886 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3887 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3888 adapter->desired.rx_entries = max_entries; 3889 } 3890 3891 if (adapter->desired.tx_entries) 3892 adapter->req_tx_entries_per_subcrq = 3893 adapter->desired.tx_entries; 3894 else 3895 adapter->req_tx_entries_per_subcrq = 3896 adapter->max_tx_entries_per_subcrq; 3897 3898 if (adapter->desired.rx_entries) 3899 adapter->req_rx_add_entries_per_subcrq = 3900 adapter->desired.rx_entries; 3901 else 3902 adapter->req_rx_add_entries_per_subcrq = 3903 adapter->max_rx_add_entries_per_subcrq; 3904 3905 if (adapter->desired.tx_queues) 3906 adapter->req_tx_queues = 3907 adapter->desired.tx_queues; 3908 else 3909 adapter->req_tx_queues = 3910 adapter->opt_tx_comp_sub_queues; 3911 3912 if (adapter->desired.rx_queues) 3913 adapter->req_rx_queues = 3914 adapter->desired.rx_queues; 3915 else 3916 adapter->req_rx_queues = 3917 adapter->opt_rx_comp_queues; 3918 3919 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3920 } 3921 3922 memset(&crq, 0, sizeof(crq)); 3923 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3924 crq.request_capability.cmd = REQUEST_CAPABILITY; 3925 3926 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3927 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3928 atomic_inc(&adapter->running_cap_crqs); 3929 ibmvnic_send_crq(adapter, &crq); 3930 3931 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3932 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3933 atomic_inc(&adapter->running_cap_crqs); 3934 ibmvnic_send_crq(adapter, &crq); 3935 3936 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3937 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3938 atomic_inc(&adapter->running_cap_crqs); 3939 ibmvnic_send_crq(adapter, &crq); 3940 3941 crq.request_capability.capability = 3942 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3943 crq.request_capability.number = 3944 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3945 atomic_inc(&adapter->running_cap_crqs); 3946 ibmvnic_send_crq(adapter, &crq); 3947 3948 crq.request_capability.capability = 3949 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3950 crq.request_capability.number = 3951 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3952 atomic_inc(&adapter->running_cap_crqs); 3953 ibmvnic_send_crq(adapter, &crq); 3954 3955 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3956 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3957 atomic_inc(&adapter->running_cap_crqs); 3958 ibmvnic_send_crq(adapter, &crq); 3959 3960 if (adapter->netdev->flags & IFF_PROMISC) { 3961 if (adapter->promisc_supported) { 3962 crq.request_capability.capability = 3963 cpu_to_be16(PROMISC_REQUESTED); 3964 crq.request_capability.number = cpu_to_be64(1); 3965 atomic_inc(&adapter->running_cap_crqs); 3966 ibmvnic_send_crq(adapter, &crq); 3967 } 3968 } else { 3969 crq.request_capability.capability = 3970 cpu_to_be16(PROMISC_REQUESTED); 3971 crq.request_capability.number = cpu_to_be64(0); 3972 atomic_inc(&adapter->running_cap_crqs); 3973 ibmvnic_send_crq(adapter, &crq); 3974 } 3975 } 3976 3977 static int pending_scrq(struct ibmvnic_adapter *adapter, 3978 struct ibmvnic_sub_crq_queue *scrq) 3979 { 3980 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3981 int rc; 3982 3983 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3984 3985 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3986 * contents of the SCRQ descriptor 3987 */ 3988 dma_rmb(); 3989 3990 return rc; 3991 } 3992 3993 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3994 struct ibmvnic_sub_crq_queue *scrq) 3995 { 3996 union sub_crq *entry; 3997 unsigned long flags; 3998 3999 spin_lock_irqsave(&scrq->lock, flags); 4000 entry = &scrq->msgs[scrq->cur]; 4001 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4002 if (++scrq->cur == scrq->size) 4003 scrq->cur = 0; 4004 } else { 4005 entry = NULL; 4006 } 4007 spin_unlock_irqrestore(&scrq->lock, flags); 4008 4009 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4010 * contents of the SCRQ descriptor 4011 */ 4012 dma_rmb(); 4013 4014 return entry; 4015 } 4016 4017 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4018 { 4019 struct ibmvnic_crq_queue *queue = &adapter->crq; 4020 union ibmvnic_crq *crq; 4021 4022 crq = &queue->msgs[queue->cur]; 4023 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4024 if (++queue->cur == queue->size) 4025 queue->cur = 0; 4026 } else { 4027 crq = NULL; 4028 } 4029 4030 return crq; 4031 } 4032 4033 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4034 { 4035 switch (rc) { 4036 case H_PARAMETER: 4037 dev_warn_ratelimited(dev, 4038 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4039 func, rc); 4040 break; 4041 case H_CLOSED: 4042 dev_warn_ratelimited(dev, 4043 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4044 func, rc); 4045 break; 4046 default: 4047 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4048 break; 4049 } 4050 } 4051 4052 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4053 u64 remote_handle, u64 ioba, u64 num_entries) 4054 { 4055 unsigned int ua = adapter->vdev->unit_address; 4056 struct device *dev = &adapter->vdev->dev; 4057 int rc; 4058 4059 /* Make sure the hypervisor sees the complete request */ 4060 dma_wmb(); 4061 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4062 cpu_to_be64(remote_handle), 4063 ioba, num_entries); 4064 4065 if (rc) 4066 print_subcrq_error(dev, rc, __func__); 4067 4068 return rc; 4069 } 4070 4071 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4072 union ibmvnic_crq *crq) 4073 { 4074 unsigned int ua = adapter->vdev->unit_address; 4075 struct device *dev = &adapter->vdev->dev; 4076 u64 *u64_crq = (u64 *)crq; 4077 int rc; 4078 4079 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4080 (unsigned long)cpu_to_be64(u64_crq[0]), 4081 (unsigned long)cpu_to_be64(u64_crq[1])); 4082 4083 if (!adapter->crq.active && 4084 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4085 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4086 return -EINVAL; 4087 } 4088 4089 /* Make sure the hypervisor sees the complete request */ 4090 dma_wmb(); 4091 4092 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4093 cpu_to_be64(u64_crq[0]), 4094 cpu_to_be64(u64_crq[1])); 4095 4096 if (rc) { 4097 if (rc == H_CLOSED) { 4098 dev_warn(dev, "CRQ Queue closed\n"); 4099 /* do not reset, report the fail, wait for passive init from server */ 4100 } 4101 4102 dev_warn(dev, "Send error (rc=%d)\n", rc); 4103 } 4104 4105 return rc; 4106 } 4107 4108 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4109 { 4110 struct device *dev = &adapter->vdev->dev; 4111 union ibmvnic_crq crq; 4112 int retries = 100; 4113 int rc; 4114 4115 memset(&crq, 0, sizeof(crq)); 4116 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4117 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4118 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4119 4120 do { 4121 rc = ibmvnic_send_crq(adapter, &crq); 4122 if (rc != H_CLOSED) 4123 break; 4124 retries--; 4125 msleep(50); 4126 4127 } while (retries > 0); 4128 4129 if (rc) { 4130 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4131 return rc; 4132 } 4133 4134 return 0; 4135 } 4136 4137 struct vnic_login_client_data { 4138 u8 type; 4139 __be16 len; 4140 char name[]; 4141 } __packed; 4142 4143 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4144 { 4145 int len; 4146 4147 /* Calculate the amount of buffer space needed for the 4148 * vnic client data in the login buffer. There are four entries, 4149 * OS name, LPAR name, device name, and a null last entry. 4150 */ 4151 len = 4 * sizeof(struct vnic_login_client_data); 4152 len += 6; /* "Linux" plus NULL */ 4153 len += strlen(utsname()->nodename) + 1; 4154 len += strlen(adapter->netdev->name) + 1; 4155 4156 return len; 4157 } 4158 4159 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4160 struct vnic_login_client_data *vlcd) 4161 { 4162 const char *os_name = "Linux"; 4163 int len; 4164 4165 /* Type 1 - LPAR OS */ 4166 vlcd->type = 1; 4167 len = strlen(os_name) + 1; 4168 vlcd->len = cpu_to_be16(len); 4169 strscpy(vlcd->name, os_name, len); 4170 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4171 4172 /* Type 2 - LPAR name */ 4173 vlcd->type = 2; 4174 len = strlen(utsname()->nodename) + 1; 4175 vlcd->len = cpu_to_be16(len); 4176 strscpy(vlcd->name, utsname()->nodename, len); 4177 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4178 4179 /* Type 3 - device name */ 4180 vlcd->type = 3; 4181 len = strlen(adapter->netdev->name) + 1; 4182 vlcd->len = cpu_to_be16(len); 4183 strscpy(vlcd->name, adapter->netdev->name, len); 4184 } 4185 4186 static int send_login(struct ibmvnic_adapter *adapter) 4187 { 4188 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4189 struct ibmvnic_login_buffer *login_buffer; 4190 struct device *dev = &adapter->vdev->dev; 4191 struct vnic_login_client_data *vlcd; 4192 dma_addr_t rsp_buffer_token; 4193 dma_addr_t buffer_token; 4194 size_t rsp_buffer_size; 4195 union ibmvnic_crq crq; 4196 int client_data_len; 4197 size_t buffer_size; 4198 __be64 *tx_list_p; 4199 __be64 *rx_list_p; 4200 int rc; 4201 int i; 4202 4203 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4204 netdev_err(adapter->netdev, 4205 "RX or TX queues are not allocated, device login failed\n"); 4206 return -1; 4207 } 4208 4209 release_login_buffer(adapter); 4210 release_login_rsp_buffer(adapter); 4211 4212 client_data_len = vnic_client_data_len(adapter); 4213 4214 buffer_size = 4215 sizeof(struct ibmvnic_login_buffer) + 4216 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4217 client_data_len; 4218 4219 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4220 if (!login_buffer) 4221 goto buf_alloc_failed; 4222 4223 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4224 DMA_TO_DEVICE); 4225 if (dma_mapping_error(dev, buffer_token)) { 4226 dev_err(dev, "Couldn't map login buffer\n"); 4227 goto buf_map_failed; 4228 } 4229 4230 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4231 sizeof(u64) * adapter->req_tx_queues + 4232 sizeof(u64) * adapter->req_rx_queues + 4233 sizeof(u64) * adapter->req_rx_queues + 4234 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4235 4236 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4237 if (!login_rsp_buffer) 4238 goto buf_rsp_alloc_failed; 4239 4240 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4241 rsp_buffer_size, DMA_FROM_DEVICE); 4242 if (dma_mapping_error(dev, rsp_buffer_token)) { 4243 dev_err(dev, "Couldn't map login rsp buffer\n"); 4244 goto buf_rsp_map_failed; 4245 } 4246 4247 adapter->login_buf = login_buffer; 4248 adapter->login_buf_token = buffer_token; 4249 adapter->login_buf_sz = buffer_size; 4250 adapter->login_rsp_buf = login_rsp_buffer; 4251 adapter->login_rsp_buf_token = rsp_buffer_token; 4252 adapter->login_rsp_buf_sz = rsp_buffer_size; 4253 4254 login_buffer->len = cpu_to_be32(buffer_size); 4255 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4256 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4257 login_buffer->off_txcomp_subcrqs = 4258 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4259 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4260 login_buffer->off_rxcomp_subcrqs = 4261 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4262 sizeof(u64) * adapter->req_tx_queues); 4263 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4264 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4265 4266 tx_list_p = (__be64 *)((char *)login_buffer + 4267 sizeof(struct ibmvnic_login_buffer)); 4268 rx_list_p = (__be64 *)((char *)login_buffer + 4269 sizeof(struct ibmvnic_login_buffer) + 4270 sizeof(u64) * adapter->req_tx_queues); 4271 4272 for (i = 0; i < adapter->req_tx_queues; i++) { 4273 if (adapter->tx_scrq[i]) { 4274 tx_list_p[i] = 4275 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4276 } 4277 } 4278 4279 for (i = 0; i < adapter->req_rx_queues; i++) { 4280 if (adapter->rx_scrq[i]) { 4281 rx_list_p[i] = 4282 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4283 } 4284 } 4285 4286 /* Insert vNIC login client data */ 4287 vlcd = (struct vnic_login_client_data *) 4288 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4289 login_buffer->client_data_offset = 4290 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4291 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4292 4293 vnic_add_client_data(adapter, vlcd); 4294 4295 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4296 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4297 netdev_dbg(adapter->netdev, "%016lx\n", 4298 ((unsigned long *)(adapter->login_buf))[i]); 4299 } 4300 4301 memset(&crq, 0, sizeof(crq)); 4302 crq.login.first = IBMVNIC_CRQ_CMD; 4303 crq.login.cmd = LOGIN; 4304 crq.login.ioba = cpu_to_be32(buffer_token); 4305 crq.login.len = cpu_to_be32(buffer_size); 4306 4307 adapter->login_pending = true; 4308 rc = ibmvnic_send_crq(adapter, &crq); 4309 if (rc) { 4310 adapter->login_pending = false; 4311 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4312 goto buf_rsp_map_failed; 4313 } 4314 4315 return 0; 4316 4317 buf_rsp_map_failed: 4318 kfree(login_rsp_buffer); 4319 adapter->login_rsp_buf = NULL; 4320 buf_rsp_alloc_failed: 4321 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4322 buf_map_failed: 4323 kfree(login_buffer); 4324 adapter->login_buf = NULL; 4325 buf_alloc_failed: 4326 return -1; 4327 } 4328 4329 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4330 u32 len, u8 map_id) 4331 { 4332 union ibmvnic_crq crq; 4333 4334 memset(&crq, 0, sizeof(crq)); 4335 crq.request_map.first = IBMVNIC_CRQ_CMD; 4336 crq.request_map.cmd = REQUEST_MAP; 4337 crq.request_map.map_id = map_id; 4338 crq.request_map.ioba = cpu_to_be32(addr); 4339 crq.request_map.len = cpu_to_be32(len); 4340 return ibmvnic_send_crq(adapter, &crq); 4341 } 4342 4343 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4344 { 4345 union ibmvnic_crq crq; 4346 4347 memset(&crq, 0, sizeof(crq)); 4348 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4349 crq.request_unmap.cmd = REQUEST_UNMAP; 4350 crq.request_unmap.map_id = map_id; 4351 return ibmvnic_send_crq(adapter, &crq); 4352 } 4353 4354 static void send_query_map(struct ibmvnic_adapter *adapter) 4355 { 4356 union ibmvnic_crq crq; 4357 4358 memset(&crq, 0, sizeof(crq)); 4359 crq.query_map.first = IBMVNIC_CRQ_CMD; 4360 crq.query_map.cmd = QUERY_MAP; 4361 ibmvnic_send_crq(adapter, &crq); 4362 } 4363 4364 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4365 static void send_query_cap(struct ibmvnic_adapter *adapter) 4366 { 4367 union ibmvnic_crq crq; 4368 4369 atomic_set(&adapter->running_cap_crqs, 0); 4370 memset(&crq, 0, sizeof(crq)); 4371 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4372 crq.query_capability.cmd = QUERY_CAPABILITY; 4373 4374 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4375 atomic_inc(&adapter->running_cap_crqs); 4376 ibmvnic_send_crq(adapter, &crq); 4377 4378 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4379 atomic_inc(&adapter->running_cap_crqs); 4380 ibmvnic_send_crq(adapter, &crq); 4381 4382 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4383 atomic_inc(&adapter->running_cap_crqs); 4384 ibmvnic_send_crq(adapter, &crq); 4385 4386 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4387 atomic_inc(&adapter->running_cap_crqs); 4388 ibmvnic_send_crq(adapter, &crq); 4389 4390 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4391 atomic_inc(&adapter->running_cap_crqs); 4392 ibmvnic_send_crq(adapter, &crq); 4393 4394 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4395 atomic_inc(&adapter->running_cap_crqs); 4396 ibmvnic_send_crq(adapter, &crq); 4397 4398 crq.query_capability.capability = 4399 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4400 atomic_inc(&adapter->running_cap_crqs); 4401 ibmvnic_send_crq(adapter, &crq); 4402 4403 crq.query_capability.capability = 4404 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4405 atomic_inc(&adapter->running_cap_crqs); 4406 ibmvnic_send_crq(adapter, &crq); 4407 4408 crq.query_capability.capability = 4409 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4410 atomic_inc(&adapter->running_cap_crqs); 4411 ibmvnic_send_crq(adapter, &crq); 4412 4413 crq.query_capability.capability = 4414 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4415 atomic_inc(&adapter->running_cap_crqs); 4416 ibmvnic_send_crq(adapter, &crq); 4417 4418 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4419 atomic_inc(&adapter->running_cap_crqs); 4420 ibmvnic_send_crq(adapter, &crq); 4421 4422 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4423 atomic_inc(&adapter->running_cap_crqs); 4424 ibmvnic_send_crq(adapter, &crq); 4425 4426 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4427 atomic_inc(&adapter->running_cap_crqs); 4428 ibmvnic_send_crq(adapter, &crq); 4429 4430 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4431 atomic_inc(&adapter->running_cap_crqs); 4432 ibmvnic_send_crq(adapter, &crq); 4433 4434 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4435 atomic_inc(&adapter->running_cap_crqs); 4436 ibmvnic_send_crq(adapter, &crq); 4437 4438 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4439 atomic_inc(&adapter->running_cap_crqs); 4440 ibmvnic_send_crq(adapter, &crq); 4441 4442 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4443 atomic_inc(&adapter->running_cap_crqs); 4444 ibmvnic_send_crq(adapter, &crq); 4445 4446 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4447 atomic_inc(&adapter->running_cap_crqs); 4448 ibmvnic_send_crq(adapter, &crq); 4449 4450 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4451 atomic_inc(&adapter->running_cap_crqs); 4452 ibmvnic_send_crq(adapter, &crq); 4453 4454 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4455 atomic_inc(&adapter->running_cap_crqs); 4456 ibmvnic_send_crq(adapter, &crq); 4457 4458 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4459 atomic_inc(&adapter->running_cap_crqs); 4460 ibmvnic_send_crq(adapter, &crq); 4461 4462 crq.query_capability.capability = 4463 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4464 atomic_inc(&adapter->running_cap_crqs); 4465 ibmvnic_send_crq(adapter, &crq); 4466 4467 crq.query_capability.capability = 4468 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4469 atomic_inc(&adapter->running_cap_crqs); 4470 ibmvnic_send_crq(adapter, &crq); 4471 4472 crq.query_capability.capability = 4473 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4474 atomic_inc(&adapter->running_cap_crqs); 4475 ibmvnic_send_crq(adapter, &crq); 4476 4477 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4478 atomic_inc(&adapter->running_cap_crqs); 4479 ibmvnic_send_crq(adapter, &crq); 4480 } 4481 4482 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4483 { 4484 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4485 struct device *dev = &adapter->vdev->dev; 4486 union ibmvnic_crq crq; 4487 4488 adapter->ip_offload_tok = 4489 dma_map_single(dev, 4490 &adapter->ip_offload_buf, 4491 buf_sz, 4492 DMA_FROM_DEVICE); 4493 4494 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4495 if (!firmware_has_feature(FW_FEATURE_CMO)) 4496 dev_err(dev, "Couldn't map offload buffer\n"); 4497 return; 4498 } 4499 4500 memset(&crq, 0, sizeof(crq)); 4501 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4502 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4503 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4504 crq.query_ip_offload.ioba = 4505 cpu_to_be32(adapter->ip_offload_tok); 4506 4507 ibmvnic_send_crq(adapter, &crq); 4508 } 4509 4510 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4511 { 4512 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4513 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4514 struct device *dev = &adapter->vdev->dev; 4515 netdev_features_t old_hw_features = 0; 4516 union ibmvnic_crq crq; 4517 4518 adapter->ip_offload_ctrl_tok = 4519 dma_map_single(dev, 4520 ctrl_buf, 4521 sizeof(adapter->ip_offload_ctrl), 4522 DMA_TO_DEVICE); 4523 4524 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4525 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4526 return; 4527 } 4528 4529 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4530 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4531 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4532 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4533 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4534 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4535 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4536 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4537 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4538 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4539 4540 /* large_rx disabled for now, additional features needed */ 4541 ctrl_buf->large_rx_ipv4 = 0; 4542 ctrl_buf->large_rx_ipv6 = 0; 4543 4544 if (adapter->state != VNIC_PROBING) { 4545 old_hw_features = adapter->netdev->hw_features; 4546 adapter->netdev->hw_features = 0; 4547 } 4548 4549 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4550 4551 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4552 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4553 4554 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4555 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4556 4557 if ((adapter->netdev->features & 4558 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4559 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4560 4561 if (buf->large_tx_ipv4) 4562 adapter->netdev->hw_features |= NETIF_F_TSO; 4563 if (buf->large_tx_ipv6) 4564 adapter->netdev->hw_features |= NETIF_F_TSO6; 4565 4566 if (adapter->state == VNIC_PROBING) { 4567 adapter->netdev->features |= adapter->netdev->hw_features; 4568 } else if (old_hw_features != adapter->netdev->hw_features) { 4569 netdev_features_t tmp = 0; 4570 4571 /* disable features no longer supported */ 4572 adapter->netdev->features &= adapter->netdev->hw_features; 4573 /* turn on features now supported if previously enabled */ 4574 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4575 adapter->netdev->hw_features; 4576 adapter->netdev->features |= 4577 tmp & adapter->netdev->wanted_features; 4578 } 4579 4580 memset(&crq, 0, sizeof(crq)); 4581 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4582 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4583 crq.control_ip_offload.len = 4584 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4585 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4586 ibmvnic_send_crq(adapter, &crq); 4587 } 4588 4589 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4590 struct ibmvnic_adapter *adapter) 4591 { 4592 struct device *dev = &adapter->vdev->dev; 4593 4594 if (crq->get_vpd_size_rsp.rc.code) { 4595 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4596 crq->get_vpd_size_rsp.rc.code); 4597 complete(&adapter->fw_done); 4598 return; 4599 } 4600 4601 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4602 complete(&adapter->fw_done); 4603 } 4604 4605 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4606 struct ibmvnic_adapter *adapter) 4607 { 4608 struct device *dev = &adapter->vdev->dev; 4609 unsigned char *substr = NULL; 4610 u8 fw_level_len = 0; 4611 4612 memset(adapter->fw_version, 0, 32); 4613 4614 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4615 DMA_FROM_DEVICE); 4616 4617 if (crq->get_vpd_rsp.rc.code) { 4618 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4619 crq->get_vpd_rsp.rc.code); 4620 goto complete; 4621 } 4622 4623 /* get the position of the firmware version info 4624 * located after the ASCII 'RM' substring in the buffer 4625 */ 4626 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4627 if (!substr) { 4628 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4629 goto complete; 4630 } 4631 4632 /* get length of firmware level ASCII substring */ 4633 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4634 fw_level_len = *(substr + 2); 4635 } else { 4636 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4637 goto complete; 4638 } 4639 4640 /* copy firmware version string from vpd into adapter */ 4641 if ((substr + 3 + fw_level_len) < 4642 (adapter->vpd->buff + adapter->vpd->len)) { 4643 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4644 } else { 4645 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4646 } 4647 4648 complete: 4649 if (adapter->fw_version[0] == '\0') 4650 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4651 complete(&adapter->fw_done); 4652 } 4653 4654 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4655 { 4656 struct device *dev = &adapter->vdev->dev; 4657 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4658 int i; 4659 4660 dma_unmap_single(dev, adapter->ip_offload_tok, 4661 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4662 4663 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4664 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4665 netdev_dbg(adapter->netdev, "%016lx\n", 4666 ((unsigned long *)(buf))[i]); 4667 4668 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4669 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4670 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4671 buf->tcp_ipv4_chksum); 4672 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4673 buf->tcp_ipv6_chksum); 4674 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4675 buf->udp_ipv4_chksum); 4676 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4677 buf->udp_ipv6_chksum); 4678 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4679 buf->large_tx_ipv4); 4680 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4681 buf->large_tx_ipv6); 4682 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4683 buf->large_rx_ipv4); 4684 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4685 buf->large_rx_ipv6); 4686 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4687 buf->max_ipv4_header_size); 4688 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4689 buf->max_ipv6_header_size); 4690 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4691 buf->max_tcp_header_size); 4692 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4693 buf->max_udp_header_size); 4694 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4695 buf->max_large_tx_size); 4696 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4697 buf->max_large_rx_size); 4698 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4699 buf->ipv6_extension_header); 4700 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4701 buf->tcp_pseudosum_req); 4702 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4703 buf->num_ipv6_ext_headers); 4704 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4705 buf->off_ipv6_ext_headers); 4706 4707 send_control_ip_offload(adapter); 4708 } 4709 4710 static const char *ibmvnic_fw_err_cause(u16 cause) 4711 { 4712 switch (cause) { 4713 case ADAPTER_PROBLEM: 4714 return "adapter problem"; 4715 case BUS_PROBLEM: 4716 return "bus problem"; 4717 case FW_PROBLEM: 4718 return "firmware problem"; 4719 case DD_PROBLEM: 4720 return "device driver problem"; 4721 case EEH_RECOVERY: 4722 return "EEH recovery"; 4723 case FW_UPDATED: 4724 return "firmware updated"; 4725 case LOW_MEMORY: 4726 return "low Memory"; 4727 default: 4728 return "unknown"; 4729 } 4730 } 4731 4732 static void handle_error_indication(union ibmvnic_crq *crq, 4733 struct ibmvnic_adapter *adapter) 4734 { 4735 struct device *dev = &adapter->vdev->dev; 4736 u16 cause; 4737 4738 cause = be16_to_cpu(crq->error_indication.error_cause); 4739 4740 dev_warn_ratelimited(dev, 4741 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4742 crq->error_indication.flags 4743 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4744 ibmvnic_fw_err_cause(cause)); 4745 4746 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4747 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4748 else 4749 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4750 } 4751 4752 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4753 struct ibmvnic_adapter *adapter) 4754 { 4755 struct net_device *netdev = adapter->netdev; 4756 struct device *dev = &adapter->vdev->dev; 4757 long rc; 4758 4759 rc = crq->change_mac_addr_rsp.rc.code; 4760 if (rc) { 4761 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4762 goto out; 4763 } 4764 /* crq->change_mac_addr.mac_addr is the requested one 4765 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4766 */ 4767 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 4768 ether_addr_copy(adapter->mac_addr, 4769 &crq->change_mac_addr_rsp.mac_addr[0]); 4770 out: 4771 complete(&adapter->fw_done); 4772 return rc; 4773 } 4774 4775 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4776 struct ibmvnic_adapter *adapter) 4777 { 4778 struct device *dev = &adapter->vdev->dev; 4779 u64 *req_value; 4780 char *name; 4781 4782 atomic_dec(&adapter->running_cap_crqs); 4783 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4784 case REQ_TX_QUEUES: 4785 req_value = &adapter->req_tx_queues; 4786 name = "tx"; 4787 break; 4788 case REQ_RX_QUEUES: 4789 req_value = &adapter->req_rx_queues; 4790 name = "rx"; 4791 break; 4792 case REQ_RX_ADD_QUEUES: 4793 req_value = &adapter->req_rx_add_queues; 4794 name = "rx_add"; 4795 break; 4796 case REQ_TX_ENTRIES_PER_SUBCRQ: 4797 req_value = &adapter->req_tx_entries_per_subcrq; 4798 name = "tx_entries_per_subcrq"; 4799 break; 4800 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4801 req_value = &adapter->req_rx_add_entries_per_subcrq; 4802 name = "rx_add_entries_per_subcrq"; 4803 break; 4804 case REQ_MTU: 4805 req_value = &adapter->req_mtu; 4806 name = "mtu"; 4807 break; 4808 case PROMISC_REQUESTED: 4809 req_value = &adapter->promisc; 4810 name = "promisc"; 4811 break; 4812 default: 4813 dev_err(dev, "Got invalid cap request rsp %d\n", 4814 crq->request_capability.capability); 4815 return; 4816 } 4817 4818 switch (crq->request_capability_rsp.rc.code) { 4819 case SUCCESS: 4820 break; 4821 case PARTIALSUCCESS: 4822 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4823 *req_value, 4824 (long)be64_to_cpu(crq->request_capability_rsp.number), 4825 name); 4826 4827 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4828 REQ_MTU) { 4829 pr_err("mtu of %llu is not supported. Reverting.\n", 4830 *req_value); 4831 *req_value = adapter->fallback.mtu; 4832 } else { 4833 *req_value = 4834 be64_to_cpu(crq->request_capability_rsp.number); 4835 } 4836 4837 send_request_cap(adapter, 1); 4838 return; 4839 default: 4840 dev_err(dev, "Error %d in request cap rsp\n", 4841 crq->request_capability_rsp.rc.code); 4842 return; 4843 } 4844 4845 /* Done receiving requested capabilities, query IP offload support */ 4846 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4847 adapter->wait_capability = false; 4848 send_query_ip_offload(adapter); 4849 } 4850 } 4851 4852 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4853 struct ibmvnic_adapter *adapter) 4854 { 4855 struct device *dev = &adapter->vdev->dev; 4856 struct net_device *netdev = adapter->netdev; 4857 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4858 struct ibmvnic_login_buffer *login = adapter->login_buf; 4859 u64 *tx_handle_array; 4860 u64 *rx_handle_array; 4861 int num_tx_pools; 4862 int num_rx_pools; 4863 u64 *size_array; 4864 int i; 4865 4866 /* CHECK: Test/set of login_pending does not need to be atomic 4867 * because only ibmvnic_tasklet tests/clears this. 4868 */ 4869 if (!adapter->login_pending) { 4870 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4871 return 0; 4872 } 4873 adapter->login_pending = false; 4874 4875 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4876 DMA_TO_DEVICE); 4877 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4878 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4879 4880 /* If the number of queues requested can't be allocated by the 4881 * server, the login response will return with code 1. We will need 4882 * to resend the login buffer with fewer queues requested. 4883 */ 4884 if (login_rsp_crq->generic.rc.code) { 4885 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4886 complete(&adapter->init_done); 4887 return 0; 4888 } 4889 4890 if (adapter->failover_pending) { 4891 adapter->init_done_rc = -EAGAIN; 4892 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 4893 complete(&adapter->init_done); 4894 /* login response buffer will be released on reset */ 4895 return 0; 4896 } 4897 4898 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4899 4900 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4901 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4902 netdev_dbg(adapter->netdev, "%016lx\n", 4903 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4904 } 4905 4906 /* Sanity checks */ 4907 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4908 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4909 adapter->req_rx_add_queues != 4910 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4911 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4912 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4913 return -EIO; 4914 } 4915 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4916 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4917 /* variable buffer sizes are not supported, so just read the 4918 * first entry. 4919 */ 4920 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4921 4922 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4923 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4924 4925 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4926 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4927 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4928 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4929 4930 for (i = 0; i < num_tx_pools; i++) 4931 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4932 4933 for (i = 0; i < num_rx_pools; i++) 4934 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4935 4936 adapter->num_active_tx_scrqs = num_tx_pools; 4937 adapter->num_active_rx_scrqs = num_rx_pools; 4938 release_login_rsp_buffer(adapter); 4939 release_login_buffer(adapter); 4940 complete(&adapter->init_done); 4941 4942 return 0; 4943 } 4944 4945 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4946 struct ibmvnic_adapter *adapter) 4947 { 4948 struct device *dev = &adapter->vdev->dev; 4949 long rc; 4950 4951 rc = crq->request_unmap_rsp.rc.code; 4952 if (rc) 4953 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4954 } 4955 4956 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4957 struct ibmvnic_adapter *adapter) 4958 { 4959 struct net_device *netdev = adapter->netdev; 4960 struct device *dev = &adapter->vdev->dev; 4961 long rc; 4962 4963 rc = crq->query_map_rsp.rc.code; 4964 if (rc) { 4965 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4966 return; 4967 } 4968 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 4969 crq->query_map_rsp.page_size, 4970 __be32_to_cpu(crq->query_map_rsp.tot_pages), 4971 __be32_to_cpu(crq->query_map_rsp.free_pages)); 4972 } 4973 4974 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4975 struct ibmvnic_adapter *adapter) 4976 { 4977 struct net_device *netdev = adapter->netdev; 4978 struct device *dev = &adapter->vdev->dev; 4979 long rc; 4980 4981 atomic_dec(&adapter->running_cap_crqs); 4982 netdev_dbg(netdev, "Outstanding queries: %d\n", 4983 atomic_read(&adapter->running_cap_crqs)); 4984 rc = crq->query_capability.rc.code; 4985 if (rc) { 4986 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4987 goto out; 4988 } 4989 4990 switch (be16_to_cpu(crq->query_capability.capability)) { 4991 case MIN_TX_QUEUES: 4992 adapter->min_tx_queues = 4993 be64_to_cpu(crq->query_capability.number); 4994 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4995 adapter->min_tx_queues); 4996 break; 4997 case MIN_RX_QUEUES: 4998 adapter->min_rx_queues = 4999 be64_to_cpu(crq->query_capability.number); 5000 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5001 adapter->min_rx_queues); 5002 break; 5003 case MIN_RX_ADD_QUEUES: 5004 adapter->min_rx_add_queues = 5005 be64_to_cpu(crq->query_capability.number); 5006 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5007 adapter->min_rx_add_queues); 5008 break; 5009 case MAX_TX_QUEUES: 5010 adapter->max_tx_queues = 5011 be64_to_cpu(crq->query_capability.number); 5012 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5013 adapter->max_tx_queues); 5014 break; 5015 case MAX_RX_QUEUES: 5016 adapter->max_rx_queues = 5017 be64_to_cpu(crq->query_capability.number); 5018 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5019 adapter->max_rx_queues); 5020 break; 5021 case MAX_RX_ADD_QUEUES: 5022 adapter->max_rx_add_queues = 5023 be64_to_cpu(crq->query_capability.number); 5024 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5025 adapter->max_rx_add_queues); 5026 break; 5027 case MIN_TX_ENTRIES_PER_SUBCRQ: 5028 adapter->min_tx_entries_per_subcrq = 5029 be64_to_cpu(crq->query_capability.number); 5030 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5031 adapter->min_tx_entries_per_subcrq); 5032 break; 5033 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5034 adapter->min_rx_add_entries_per_subcrq = 5035 be64_to_cpu(crq->query_capability.number); 5036 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5037 adapter->min_rx_add_entries_per_subcrq); 5038 break; 5039 case MAX_TX_ENTRIES_PER_SUBCRQ: 5040 adapter->max_tx_entries_per_subcrq = 5041 be64_to_cpu(crq->query_capability.number); 5042 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5043 adapter->max_tx_entries_per_subcrq); 5044 break; 5045 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5046 adapter->max_rx_add_entries_per_subcrq = 5047 be64_to_cpu(crq->query_capability.number); 5048 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5049 adapter->max_rx_add_entries_per_subcrq); 5050 break; 5051 case TCP_IP_OFFLOAD: 5052 adapter->tcp_ip_offload = 5053 be64_to_cpu(crq->query_capability.number); 5054 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5055 adapter->tcp_ip_offload); 5056 break; 5057 case PROMISC_SUPPORTED: 5058 adapter->promisc_supported = 5059 be64_to_cpu(crq->query_capability.number); 5060 netdev_dbg(netdev, "promisc_supported = %lld\n", 5061 adapter->promisc_supported); 5062 break; 5063 case MIN_MTU: 5064 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5065 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5066 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5067 break; 5068 case MAX_MTU: 5069 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5070 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5071 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5072 break; 5073 case MAX_MULTICAST_FILTERS: 5074 adapter->max_multicast_filters = 5075 be64_to_cpu(crq->query_capability.number); 5076 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5077 adapter->max_multicast_filters); 5078 break; 5079 case VLAN_HEADER_INSERTION: 5080 adapter->vlan_header_insertion = 5081 be64_to_cpu(crq->query_capability.number); 5082 if (adapter->vlan_header_insertion) 5083 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5084 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5085 adapter->vlan_header_insertion); 5086 break; 5087 case RX_VLAN_HEADER_INSERTION: 5088 adapter->rx_vlan_header_insertion = 5089 be64_to_cpu(crq->query_capability.number); 5090 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5091 adapter->rx_vlan_header_insertion); 5092 break; 5093 case MAX_TX_SG_ENTRIES: 5094 adapter->max_tx_sg_entries = 5095 be64_to_cpu(crq->query_capability.number); 5096 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5097 adapter->max_tx_sg_entries); 5098 break; 5099 case RX_SG_SUPPORTED: 5100 adapter->rx_sg_supported = 5101 be64_to_cpu(crq->query_capability.number); 5102 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5103 adapter->rx_sg_supported); 5104 break; 5105 case OPT_TX_COMP_SUB_QUEUES: 5106 adapter->opt_tx_comp_sub_queues = 5107 be64_to_cpu(crq->query_capability.number); 5108 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5109 adapter->opt_tx_comp_sub_queues); 5110 break; 5111 case OPT_RX_COMP_QUEUES: 5112 adapter->opt_rx_comp_queues = 5113 be64_to_cpu(crq->query_capability.number); 5114 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5115 adapter->opt_rx_comp_queues); 5116 break; 5117 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5118 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5119 be64_to_cpu(crq->query_capability.number); 5120 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5121 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5122 break; 5123 case OPT_TX_ENTRIES_PER_SUBCRQ: 5124 adapter->opt_tx_entries_per_subcrq = 5125 be64_to_cpu(crq->query_capability.number); 5126 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5127 adapter->opt_tx_entries_per_subcrq); 5128 break; 5129 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5130 adapter->opt_rxba_entries_per_subcrq = 5131 be64_to_cpu(crq->query_capability.number); 5132 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5133 adapter->opt_rxba_entries_per_subcrq); 5134 break; 5135 case TX_RX_DESC_REQ: 5136 adapter->tx_rx_desc_req = crq->query_capability.number; 5137 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5138 adapter->tx_rx_desc_req); 5139 break; 5140 5141 default: 5142 netdev_err(netdev, "Got invalid cap rsp %d\n", 5143 crq->query_capability.capability); 5144 } 5145 5146 out: 5147 if (atomic_read(&adapter->running_cap_crqs) == 0) { 5148 adapter->wait_capability = false; 5149 send_request_cap(adapter, 0); 5150 } 5151 } 5152 5153 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5154 { 5155 union ibmvnic_crq crq; 5156 int rc; 5157 5158 memset(&crq, 0, sizeof(crq)); 5159 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5160 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5161 5162 mutex_lock(&adapter->fw_lock); 5163 adapter->fw_done_rc = 0; 5164 reinit_completion(&adapter->fw_done); 5165 5166 rc = ibmvnic_send_crq(adapter, &crq); 5167 if (rc) { 5168 mutex_unlock(&adapter->fw_lock); 5169 return rc; 5170 } 5171 5172 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5173 if (rc) { 5174 mutex_unlock(&adapter->fw_lock); 5175 return rc; 5176 } 5177 5178 mutex_unlock(&adapter->fw_lock); 5179 return adapter->fw_done_rc ? -EIO : 0; 5180 } 5181 5182 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5183 struct ibmvnic_adapter *adapter) 5184 { 5185 struct net_device *netdev = adapter->netdev; 5186 int rc; 5187 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5188 5189 rc = crq->query_phys_parms_rsp.rc.code; 5190 if (rc) { 5191 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5192 return rc; 5193 } 5194 switch (rspeed) { 5195 case IBMVNIC_10MBPS: 5196 adapter->speed = SPEED_10; 5197 break; 5198 case IBMVNIC_100MBPS: 5199 adapter->speed = SPEED_100; 5200 break; 5201 case IBMVNIC_1GBPS: 5202 adapter->speed = SPEED_1000; 5203 break; 5204 case IBMVNIC_10GBPS: 5205 adapter->speed = SPEED_10000; 5206 break; 5207 case IBMVNIC_25GBPS: 5208 adapter->speed = SPEED_25000; 5209 break; 5210 case IBMVNIC_40GBPS: 5211 adapter->speed = SPEED_40000; 5212 break; 5213 case IBMVNIC_50GBPS: 5214 adapter->speed = SPEED_50000; 5215 break; 5216 case IBMVNIC_100GBPS: 5217 adapter->speed = SPEED_100000; 5218 break; 5219 case IBMVNIC_200GBPS: 5220 adapter->speed = SPEED_200000; 5221 break; 5222 default: 5223 if (netif_carrier_ok(netdev)) 5224 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5225 adapter->speed = SPEED_UNKNOWN; 5226 } 5227 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5228 adapter->duplex = DUPLEX_FULL; 5229 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5230 adapter->duplex = DUPLEX_HALF; 5231 else 5232 adapter->duplex = DUPLEX_UNKNOWN; 5233 5234 return rc; 5235 } 5236 5237 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5238 struct ibmvnic_adapter *adapter) 5239 { 5240 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5241 struct net_device *netdev = adapter->netdev; 5242 struct device *dev = &adapter->vdev->dev; 5243 u64 *u64_crq = (u64 *)crq; 5244 long rc; 5245 5246 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5247 (unsigned long)cpu_to_be64(u64_crq[0]), 5248 (unsigned long)cpu_to_be64(u64_crq[1])); 5249 switch (gen_crq->first) { 5250 case IBMVNIC_CRQ_INIT_RSP: 5251 switch (gen_crq->cmd) { 5252 case IBMVNIC_CRQ_INIT: 5253 dev_info(dev, "Partner initialized\n"); 5254 adapter->from_passive_init = true; 5255 /* Discard any stale login responses from prev reset. 5256 * CHECK: should we clear even on INIT_COMPLETE? 5257 */ 5258 adapter->login_pending = false; 5259 5260 if (adapter->state == VNIC_DOWN) 5261 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5262 else 5263 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5264 5265 if (rc && rc != -EBUSY) { 5266 /* We were unable to schedule the failover 5267 * reset either because the adapter was still 5268 * probing (eg: during kexec) or we could not 5269 * allocate memory. Clear the failover_pending 5270 * flag since no one else will. We ignore 5271 * EBUSY because it means either FAILOVER reset 5272 * is already scheduled or the adapter is 5273 * being removed. 5274 */ 5275 netdev_err(netdev, 5276 "Error %ld scheduling failover reset\n", 5277 rc); 5278 adapter->failover_pending = false; 5279 } 5280 5281 if (!completion_done(&adapter->init_done)) { 5282 complete(&adapter->init_done); 5283 if (!adapter->init_done_rc) 5284 adapter->init_done_rc = -EAGAIN; 5285 } 5286 5287 break; 5288 case IBMVNIC_CRQ_INIT_COMPLETE: 5289 dev_info(dev, "Partner initialization complete\n"); 5290 adapter->crq.active = true; 5291 send_version_xchg(adapter); 5292 break; 5293 default: 5294 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5295 } 5296 return; 5297 case IBMVNIC_CRQ_XPORT_EVENT: 5298 netif_carrier_off(netdev); 5299 adapter->crq.active = false; 5300 /* terminate any thread waiting for a response 5301 * from the device 5302 */ 5303 if (!completion_done(&adapter->fw_done)) { 5304 adapter->fw_done_rc = -EIO; 5305 complete(&adapter->fw_done); 5306 } 5307 if (!completion_done(&adapter->stats_done)) 5308 complete(&adapter->stats_done); 5309 if (test_bit(0, &adapter->resetting)) 5310 adapter->force_reset_recovery = true; 5311 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5312 dev_info(dev, "Migrated, re-enabling adapter\n"); 5313 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5314 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5315 dev_info(dev, "Backing device failover detected\n"); 5316 adapter->failover_pending = true; 5317 } else { 5318 /* The adapter lost the connection */ 5319 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5320 gen_crq->cmd); 5321 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5322 } 5323 return; 5324 case IBMVNIC_CRQ_CMD_RSP: 5325 break; 5326 default: 5327 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5328 gen_crq->first); 5329 return; 5330 } 5331 5332 switch (gen_crq->cmd) { 5333 case VERSION_EXCHANGE_RSP: 5334 rc = crq->version_exchange_rsp.rc.code; 5335 if (rc) { 5336 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5337 break; 5338 } 5339 ibmvnic_version = 5340 be16_to_cpu(crq->version_exchange_rsp.version); 5341 dev_info(dev, "Partner protocol version is %d\n", 5342 ibmvnic_version); 5343 send_query_cap(adapter); 5344 break; 5345 case QUERY_CAPABILITY_RSP: 5346 handle_query_cap_rsp(crq, adapter); 5347 break; 5348 case QUERY_MAP_RSP: 5349 handle_query_map_rsp(crq, adapter); 5350 break; 5351 case REQUEST_MAP_RSP: 5352 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5353 complete(&adapter->fw_done); 5354 break; 5355 case REQUEST_UNMAP_RSP: 5356 handle_request_unmap_rsp(crq, adapter); 5357 break; 5358 case REQUEST_CAPABILITY_RSP: 5359 handle_request_cap_rsp(crq, adapter); 5360 break; 5361 case LOGIN_RSP: 5362 netdev_dbg(netdev, "Got Login Response\n"); 5363 handle_login_rsp(crq, adapter); 5364 break; 5365 case LOGICAL_LINK_STATE_RSP: 5366 netdev_dbg(netdev, 5367 "Got Logical Link State Response, state: %d rc: %d\n", 5368 crq->logical_link_state_rsp.link_state, 5369 crq->logical_link_state_rsp.rc.code); 5370 adapter->logical_link_state = 5371 crq->logical_link_state_rsp.link_state; 5372 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5373 complete(&adapter->init_done); 5374 break; 5375 case LINK_STATE_INDICATION: 5376 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5377 adapter->phys_link_state = 5378 crq->link_state_indication.phys_link_state; 5379 adapter->logical_link_state = 5380 crq->link_state_indication.logical_link_state; 5381 if (adapter->phys_link_state && adapter->logical_link_state) 5382 netif_carrier_on(netdev); 5383 else 5384 netif_carrier_off(netdev); 5385 break; 5386 case CHANGE_MAC_ADDR_RSP: 5387 netdev_dbg(netdev, "Got MAC address change Response\n"); 5388 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5389 break; 5390 case ERROR_INDICATION: 5391 netdev_dbg(netdev, "Got Error Indication\n"); 5392 handle_error_indication(crq, adapter); 5393 break; 5394 case REQUEST_STATISTICS_RSP: 5395 netdev_dbg(netdev, "Got Statistics Response\n"); 5396 complete(&adapter->stats_done); 5397 break; 5398 case QUERY_IP_OFFLOAD_RSP: 5399 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5400 handle_query_ip_offload_rsp(adapter); 5401 break; 5402 case MULTICAST_CTRL_RSP: 5403 netdev_dbg(netdev, "Got multicast control Response\n"); 5404 break; 5405 case CONTROL_IP_OFFLOAD_RSP: 5406 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5407 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5408 sizeof(adapter->ip_offload_ctrl), 5409 DMA_TO_DEVICE); 5410 complete(&adapter->init_done); 5411 break; 5412 case COLLECT_FW_TRACE_RSP: 5413 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5414 complete(&adapter->fw_done); 5415 break; 5416 case GET_VPD_SIZE_RSP: 5417 handle_vpd_size_rsp(crq, adapter); 5418 break; 5419 case GET_VPD_RSP: 5420 handle_vpd_rsp(crq, adapter); 5421 break; 5422 case QUERY_PHYS_PARMS_RSP: 5423 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5424 complete(&adapter->fw_done); 5425 break; 5426 default: 5427 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5428 gen_crq->cmd); 5429 } 5430 } 5431 5432 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5433 { 5434 struct ibmvnic_adapter *adapter = instance; 5435 5436 tasklet_schedule(&adapter->tasklet); 5437 return IRQ_HANDLED; 5438 } 5439 5440 static void ibmvnic_tasklet(struct tasklet_struct *t) 5441 { 5442 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5443 struct ibmvnic_crq_queue *queue = &adapter->crq; 5444 union ibmvnic_crq *crq; 5445 unsigned long flags; 5446 bool done = false; 5447 5448 spin_lock_irqsave(&queue->lock, flags); 5449 while (!done) { 5450 /* Pull all the valid messages off the CRQ */ 5451 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5452 /* This barrier makes sure ibmvnic_next_crq()'s 5453 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5454 * before ibmvnic_handle_crq()'s 5455 * switch(gen_crq->first) and switch(gen_crq->cmd). 5456 */ 5457 dma_rmb(); 5458 ibmvnic_handle_crq(crq, adapter); 5459 crq->generic.first = 0; 5460 } 5461 5462 /* remain in tasklet until all 5463 * capabilities responses are received 5464 */ 5465 if (!adapter->wait_capability) 5466 done = true; 5467 } 5468 /* if capabilities CRQ's were sent in this tasklet, the following 5469 * tasklet must wait until all responses are received 5470 */ 5471 if (atomic_read(&adapter->running_cap_crqs) != 0) 5472 adapter->wait_capability = true; 5473 spin_unlock_irqrestore(&queue->lock, flags); 5474 } 5475 5476 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5477 { 5478 struct vio_dev *vdev = adapter->vdev; 5479 int rc; 5480 5481 do { 5482 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5483 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5484 5485 if (rc) 5486 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5487 5488 return rc; 5489 } 5490 5491 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5492 { 5493 struct ibmvnic_crq_queue *crq = &adapter->crq; 5494 struct device *dev = &adapter->vdev->dev; 5495 struct vio_dev *vdev = adapter->vdev; 5496 int rc; 5497 5498 /* Close the CRQ */ 5499 do { 5500 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5501 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5502 5503 /* Clean out the queue */ 5504 if (!crq->msgs) 5505 return -EINVAL; 5506 5507 memset(crq->msgs, 0, PAGE_SIZE); 5508 crq->cur = 0; 5509 crq->active = false; 5510 5511 /* And re-open it again */ 5512 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5513 crq->msg_token, PAGE_SIZE); 5514 5515 if (rc == H_CLOSED) 5516 /* Adapter is good, but other end is not ready */ 5517 dev_warn(dev, "Partner adapter not ready\n"); 5518 else if (rc != 0) 5519 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5520 5521 return rc; 5522 } 5523 5524 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5525 { 5526 struct ibmvnic_crq_queue *crq = &adapter->crq; 5527 struct vio_dev *vdev = adapter->vdev; 5528 long rc; 5529 5530 if (!crq->msgs) 5531 return; 5532 5533 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5534 free_irq(vdev->irq, adapter); 5535 tasklet_kill(&adapter->tasklet); 5536 do { 5537 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5538 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5539 5540 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5541 DMA_BIDIRECTIONAL); 5542 free_page((unsigned long)crq->msgs); 5543 crq->msgs = NULL; 5544 crq->active = false; 5545 } 5546 5547 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5548 { 5549 struct ibmvnic_crq_queue *crq = &adapter->crq; 5550 struct device *dev = &adapter->vdev->dev; 5551 struct vio_dev *vdev = adapter->vdev; 5552 int rc, retrc = -ENOMEM; 5553 5554 if (crq->msgs) 5555 return 0; 5556 5557 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5558 /* Should we allocate more than one page? */ 5559 5560 if (!crq->msgs) 5561 return -ENOMEM; 5562 5563 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5564 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5565 DMA_BIDIRECTIONAL); 5566 if (dma_mapping_error(dev, crq->msg_token)) 5567 goto map_failed; 5568 5569 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5570 crq->msg_token, PAGE_SIZE); 5571 5572 if (rc == H_RESOURCE) 5573 /* maybe kexecing and resource is busy. try a reset */ 5574 rc = ibmvnic_reset_crq(adapter); 5575 retrc = rc; 5576 5577 if (rc == H_CLOSED) { 5578 dev_warn(dev, "Partner adapter not ready\n"); 5579 } else if (rc) { 5580 dev_warn(dev, "Error %d opening adapter\n", rc); 5581 goto reg_crq_failed; 5582 } 5583 5584 retrc = 0; 5585 5586 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5587 5588 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5589 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5590 adapter->vdev->unit_address); 5591 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5592 if (rc) { 5593 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5594 vdev->irq, rc); 5595 goto req_irq_failed; 5596 } 5597 5598 rc = vio_enable_interrupts(vdev); 5599 if (rc) { 5600 dev_err(dev, "Error %d enabling interrupts\n", rc); 5601 goto req_irq_failed; 5602 } 5603 5604 crq->cur = 0; 5605 spin_lock_init(&crq->lock); 5606 5607 /* process any CRQs that were queued before we enabled interrupts */ 5608 tasklet_schedule(&adapter->tasklet); 5609 5610 return retrc; 5611 5612 req_irq_failed: 5613 tasklet_kill(&adapter->tasklet); 5614 do { 5615 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5616 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5617 reg_crq_failed: 5618 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5619 map_failed: 5620 free_page((unsigned long)crq->msgs); 5621 crq->msgs = NULL; 5622 return retrc; 5623 } 5624 5625 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5626 { 5627 struct device *dev = &adapter->vdev->dev; 5628 unsigned long timeout = msecs_to_jiffies(20000); 5629 u64 old_num_rx_queues = adapter->req_rx_queues; 5630 u64 old_num_tx_queues = adapter->req_tx_queues; 5631 int rc; 5632 5633 adapter->from_passive_init = false; 5634 5635 if (reset) 5636 reinit_completion(&adapter->init_done); 5637 5638 adapter->init_done_rc = 0; 5639 rc = ibmvnic_send_crq_init(adapter); 5640 if (rc) { 5641 dev_err(dev, "Send crq init failed with error %d\n", rc); 5642 return rc; 5643 } 5644 5645 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5646 dev_err(dev, "Initialization sequence timed out\n"); 5647 return -1; 5648 } 5649 5650 if (adapter->init_done_rc) { 5651 release_crq_queue(adapter); 5652 return adapter->init_done_rc; 5653 } 5654 5655 if (adapter->from_passive_init) { 5656 adapter->state = VNIC_OPEN; 5657 adapter->from_passive_init = false; 5658 return -1; 5659 } 5660 5661 if (reset && 5662 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5663 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5664 if (adapter->req_rx_queues != old_num_rx_queues || 5665 adapter->req_tx_queues != old_num_tx_queues) { 5666 release_sub_crqs(adapter, 0); 5667 rc = init_sub_crqs(adapter); 5668 } else { 5669 rc = reset_sub_crq_queues(adapter); 5670 } 5671 } else { 5672 rc = init_sub_crqs(adapter); 5673 } 5674 5675 if (rc) { 5676 dev_err(dev, "Initialization of sub crqs failed\n"); 5677 release_crq_queue(adapter); 5678 return rc; 5679 } 5680 5681 rc = init_sub_crq_irqs(adapter); 5682 if (rc) { 5683 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5684 release_crq_queue(adapter); 5685 } 5686 5687 return rc; 5688 } 5689 5690 static struct device_attribute dev_attr_failover; 5691 5692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5693 { 5694 struct ibmvnic_adapter *adapter; 5695 struct net_device *netdev; 5696 unsigned char *mac_addr_p; 5697 bool init_success; 5698 int rc; 5699 5700 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5701 dev->unit_address); 5702 5703 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5704 VETH_MAC_ADDR, NULL); 5705 if (!mac_addr_p) { 5706 dev_err(&dev->dev, 5707 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5708 __FILE__, __LINE__); 5709 return 0; 5710 } 5711 5712 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5713 IBMVNIC_MAX_QUEUES); 5714 if (!netdev) 5715 return -ENOMEM; 5716 5717 adapter = netdev_priv(netdev); 5718 adapter->state = VNIC_PROBING; 5719 dev_set_drvdata(&dev->dev, netdev); 5720 adapter->vdev = dev; 5721 adapter->netdev = netdev; 5722 adapter->login_pending = false; 5723 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 5724 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 5725 bitmap_set(adapter->map_ids, 0, 1); 5726 5727 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5728 eth_hw_addr_set(netdev, adapter->mac_addr); 5729 netdev->irq = dev->irq; 5730 netdev->netdev_ops = &ibmvnic_netdev_ops; 5731 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5732 SET_NETDEV_DEV(netdev, &dev->dev); 5733 5734 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5735 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5736 __ibmvnic_delayed_reset); 5737 INIT_LIST_HEAD(&adapter->rwi_list); 5738 spin_lock_init(&adapter->rwi_lock); 5739 spin_lock_init(&adapter->state_lock); 5740 mutex_init(&adapter->fw_lock); 5741 init_completion(&adapter->init_done); 5742 init_completion(&adapter->fw_done); 5743 init_completion(&adapter->reset_done); 5744 init_completion(&adapter->stats_done); 5745 clear_bit(0, &adapter->resetting); 5746 adapter->prev_rx_buf_sz = 0; 5747 adapter->prev_mtu = 0; 5748 5749 init_success = false; 5750 do { 5751 rc = init_crq_queue(adapter); 5752 if (rc) { 5753 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5754 rc); 5755 goto ibmvnic_init_fail; 5756 } 5757 5758 rc = ibmvnic_reset_init(adapter, false); 5759 } while (rc == -EAGAIN); 5760 5761 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5762 * partner is not ready. CRQ is not active. When the partner becomes 5763 * ready, we will do the passive init reset. 5764 */ 5765 5766 if (!rc) 5767 init_success = true; 5768 5769 rc = init_stats_buffers(adapter); 5770 if (rc) 5771 goto ibmvnic_init_fail; 5772 5773 rc = init_stats_token(adapter); 5774 if (rc) 5775 goto ibmvnic_stats_fail; 5776 5777 rc = device_create_file(&dev->dev, &dev_attr_failover); 5778 if (rc) 5779 goto ibmvnic_dev_file_err; 5780 5781 netif_carrier_off(netdev); 5782 rc = register_netdev(netdev); 5783 if (rc) { 5784 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5785 goto ibmvnic_register_fail; 5786 } 5787 dev_info(&dev->dev, "ibmvnic registered\n"); 5788 5789 if (init_success) { 5790 adapter->state = VNIC_PROBED; 5791 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5792 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5793 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5794 } else { 5795 adapter->state = VNIC_DOWN; 5796 } 5797 5798 adapter->wait_for_reset = false; 5799 adapter->last_reset_time = jiffies; 5800 return 0; 5801 5802 ibmvnic_register_fail: 5803 device_remove_file(&dev->dev, &dev_attr_failover); 5804 5805 ibmvnic_dev_file_err: 5806 release_stats_token(adapter); 5807 5808 ibmvnic_stats_fail: 5809 release_stats_buffers(adapter); 5810 5811 ibmvnic_init_fail: 5812 release_sub_crqs(adapter, 1); 5813 release_crq_queue(adapter); 5814 mutex_destroy(&adapter->fw_lock); 5815 free_netdev(netdev); 5816 5817 return rc; 5818 } 5819 5820 static void ibmvnic_remove(struct vio_dev *dev) 5821 { 5822 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5823 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5824 unsigned long flags; 5825 5826 spin_lock_irqsave(&adapter->state_lock, flags); 5827 5828 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5829 * finish. Then, set the state to REMOVING to prevent it from 5830 * scheduling any more work and to have reset functions ignore 5831 * any resets that have already been scheduled. Drop the lock 5832 * after setting state, so __ibmvnic_reset() which is called 5833 * from the flush_work() below, can make progress. 5834 */ 5835 spin_lock(&adapter->rwi_lock); 5836 adapter->state = VNIC_REMOVING; 5837 spin_unlock(&adapter->rwi_lock); 5838 5839 spin_unlock_irqrestore(&adapter->state_lock, flags); 5840 5841 flush_work(&adapter->ibmvnic_reset); 5842 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5843 5844 rtnl_lock(); 5845 unregister_netdevice(netdev); 5846 5847 release_resources(adapter); 5848 release_rx_pools(adapter); 5849 release_tx_pools(adapter); 5850 release_sub_crqs(adapter, 1); 5851 release_crq_queue(adapter); 5852 5853 release_stats_token(adapter); 5854 release_stats_buffers(adapter); 5855 5856 adapter->state = VNIC_REMOVED; 5857 5858 rtnl_unlock(); 5859 mutex_destroy(&adapter->fw_lock); 5860 device_remove_file(&dev->dev, &dev_attr_failover); 5861 free_netdev(netdev); 5862 dev_set_drvdata(&dev->dev, NULL); 5863 } 5864 5865 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5866 const char *buf, size_t count) 5867 { 5868 struct net_device *netdev = dev_get_drvdata(dev); 5869 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5870 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5871 __be64 session_token; 5872 long rc; 5873 5874 if (!sysfs_streq(buf, "1")) 5875 return -EINVAL; 5876 5877 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5878 H_GET_SESSION_TOKEN, 0, 0, 0); 5879 if (rc) { 5880 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5881 rc); 5882 goto last_resort; 5883 } 5884 5885 session_token = (__be64)retbuf[0]; 5886 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5887 be64_to_cpu(session_token)); 5888 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5889 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5890 if (rc) 5891 netdev_err(netdev, 5892 "H_VIOCTL initiated failover failed, rc %ld\n", 5893 rc); 5894 5895 last_resort: 5896 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5897 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5898 5899 return count; 5900 } 5901 static DEVICE_ATTR_WO(failover); 5902 5903 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5904 { 5905 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5906 struct ibmvnic_adapter *adapter; 5907 struct iommu_table *tbl; 5908 unsigned long ret = 0; 5909 int i; 5910 5911 tbl = get_iommu_table_base(&vdev->dev); 5912 5913 /* netdev inits at probe time along with the structures we need below*/ 5914 if (!netdev) 5915 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5916 5917 adapter = netdev_priv(netdev); 5918 5919 ret += PAGE_SIZE; /* the crq message queue */ 5920 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5921 5922 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5923 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5924 5925 for (i = 0; i < adapter->num_active_rx_pools; i++) 5926 ret += adapter->rx_pool[i].size * 5927 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5928 5929 return ret; 5930 } 5931 5932 static int ibmvnic_resume(struct device *dev) 5933 { 5934 struct net_device *netdev = dev_get_drvdata(dev); 5935 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5936 5937 if (adapter->state != VNIC_OPEN) 5938 return 0; 5939 5940 tasklet_schedule(&adapter->tasklet); 5941 5942 return 0; 5943 } 5944 5945 static const struct vio_device_id ibmvnic_device_table[] = { 5946 {"network", "IBM,vnic"}, 5947 {"", "" } 5948 }; 5949 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5950 5951 static const struct dev_pm_ops ibmvnic_pm_ops = { 5952 .resume = ibmvnic_resume 5953 }; 5954 5955 static struct vio_driver ibmvnic_driver = { 5956 .id_table = ibmvnic_device_table, 5957 .probe = ibmvnic_probe, 5958 .remove = ibmvnic_remove, 5959 .get_desired_dma = ibmvnic_get_desired_dma, 5960 .name = ibmvnic_driver_name, 5961 .pm = &ibmvnic_pm_ops, 5962 }; 5963 5964 /* module functions */ 5965 static int __init ibmvnic_module_init(void) 5966 { 5967 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5968 IBMVNIC_DRIVER_VERSION); 5969 5970 return vio_register_driver(&ibmvnic_driver); 5971 } 5972 5973 static void __exit ibmvnic_module_exit(void) 5974 { 5975 vio_unregister_driver(&ibmvnic_driver); 5976 } 5977 5978 module_init(ibmvnic_module_init); 5979 module_exit(ibmvnic_module_exit); 5980