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