1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 110 struct ibmvnic_sub_crq_queue *tx_scrq); 111 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 112 struct ibmvnic_long_term_buff *ltb); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 149 { 150 union ibmvnic_crq crq; 151 152 memset(&crq, 0, sizeof(crq)); 153 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 154 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 155 156 return ibmvnic_send_crq(adapter, &crq); 157 } 158 159 static int send_version_xchg(struct ibmvnic_adapter *adapter) 160 { 161 union ibmvnic_crq crq; 162 163 memset(&crq, 0, sizeof(crq)); 164 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 165 crq.version_exchange.cmd = VERSION_EXCHANGE; 166 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 167 168 return ibmvnic_send_crq(adapter, &crq); 169 } 170 171 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 172 unsigned long length, unsigned long *number, 173 unsigned long *irq) 174 { 175 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 176 long rc; 177 178 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 179 *number = retbuf[0]; 180 *irq = retbuf[1]; 181 182 return rc; 183 } 184 185 /** 186 * ibmvnic_wait_for_completion - Check device state and wait for completion 187 * @adapter: private device data 188 * @comp_done: completion structure to wait for 189 * @timeout: time to wait in milliseconds 190 * 191 * Wait for a completion signal or until the timeout limit is reached 192 * while checking that the device is still active. 193 */ 194 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 195 struct completion *comp_done, 196 unsigned long timeout) 197 { 198 struct net_device *netdev; 199 unsigned long div_timeout; 200 u8 retry; 201 202 netdev = adapter->netdev; 203 retry = 5; 204 div_timeout = msecs_to_jiffies(timeout / retry); 205 while (true) { 206 if (!adapter->crq.active) { 207 netdev_err(netdev, "Device down!\n"); 208 return -ENODEV; 209 } 210 if (!retry--) 211 break; 212 if (wait_for_completion_timeout(comp_done, div_timeout)) 213 return 0; 214 } 215 netdev_err(netdev, "Operation timed out.\n"); 216 return -ETIMEDOUT; 217 } 218 219 /** 220 * reuse_ltb() - Check if a long term buffer can be reused 221 * @ltb: The long term buffer to be checked 222 * @size: The size of the long term buffer. 223 * 224 * An LTB can be reused unless its size has changed. 225 * 226 * Return: Return true if the LTB can be reused, false otherwise. 227 */ 228 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 229 { 230 return (ltb->buff && ltb->size == size); 231 } 232 233 /** 234 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 235 * 236 * @adapter: ibmvnic adapter associated to the LTB 237 * @ltb: container object for the LTB 238 * @size: size of the LTB 239 * 240 * Allocate an LTB of the specified size and notify VIOS. 241 * 242 * If the given @ltb already has the correct size, reuse it. Otherwise if 243 * its non-NULL, free it. Then allocate a new one of the correct size. 244 * Notify the VIOS either way since we may now be working with a new VIOS. 245 * 246 * Allocating larger chunks of memory during resets, specially LPM or under 247 * low memory situations can cause resets to fail/timeout and for LPAR to 248 * lose connectivity. So hold onto the LTB even if we fail to communicate 249 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 250 * 251 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 252 * a negative value otherwise. 253 */ 254 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 255 struct ibmvnic_long_term_buff *ltb, int size) 256 { 257 struct device *dev = &adapter->vdev->dev; 258 int rc; 259 260 if (!reuse_ltb(ltb, size)) { 261 dev_dbg(dev, 262 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 263 ltb->size, size); 264 free_long_term_buff(adapter, ltb); 265 } 266 267 if (ltb->buff) { 268 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 269 ltb->map_id, ltb->size); 270 } else { 271 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 272 GFP_KERNEL); 273 if (!ltb->buff) { 274 dev_err(dev, "Couldn't alloc long term buffer\n"); 275 return -ENOMEM; 276 } 277 ltb->size = size; 278 279 ltb->map_id = find_first_zero_bit(adapter->map_ids, 280 MAX_MAP_ID); 281 bitmap_set(adapter->map_ids, ltb->map_id, 1); 282 283 dev_dbg(dev, 284 "Allocated new LTB [map %d, size 0x%llx]\n", 285 ltb->map_id, ltb->size); 286 } 287 288 /* Ensure ltb is zeroed - specially when reusing it. */ 289 memset(ltb->buff, 0, ltb->size); 290 291 mutex_lock(&adapter->fw_lock); 292 adapter->fw_done_rc = 0; 293 reinit_completion(&adapter->fw_done); 294 295 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 296 if (rc) { 297 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 298 goto out; 299 } 300 301 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 302 if (rc) { 303 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 304 rc); 305 goto out; 306 } 307 308 if (adapter->fw_done_rc) { 309 dev_err(dev, "Couldn't map LTB, rc = %d\n", 310 adapter->fw_done_rc); 311 rc = -1; 312 goto out; 313 } 314 rc = 0; 315 out: 316 /* don't free LTB on communication error - see function header */ 317 mutex_unlock(&adapter->fw_lock); 318 return rc; 319 } 320 321 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 322 struct ibmvnic_long_term_buff *ltb) 323 { 324 struct device *dev = &adapter->vdev->dev; 325 326 if (!ltb->buff) 327 return; 328 329 /* VIOS automatically unmaps the long term buffer at remote 330 * end for the following resets: 331 * FAILOVER, MOBILITY, TIMEOUT. 332 */ 333 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 334 adapter->reset_reason != VNIC_RESET_MOBILITY && 335 adapter->reset_reason != VNIC_RESET_TIMEOUT) 336 send_request_unmap(adapter, ltb->map_id); 337 338 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 339 340 ltb->buff = NULL; 341 /* mark this map_id free */ 342 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 343 ltb->map_id = 0; 344 } 345 346 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 347 { 348 int i; 349 350 for (i = 0; i < adapter->num_active_rx_pools; i++) 351 adapter->rx_pool[i].active = 0; 352 } 353 354 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 355 struct ibmvnic_rx_pool *pool) 356 { 357 int count = pool->size - atomic_read(&pool->available); 358 u64 handle = adapter->rx_scrq[pool->index]->handle; 359 struct device *dev = &adapter->vdev->dev; 360 struct ibmvnic_ind_xmit_queue *ind_bufp; 361 struct ibmvnic_sub_crq_queue *rx_scrq; 362 union sub_crq *sub_crq; 363 int buffers_added = 0; 364 unsigned long lpar_rc; 365 struct sk_buff *skb; 366 unsigned int offset; 367 dma_addr_t dma_addr; 368 unsigned char *dst; 369 int shift = 0; 370 int index; 371 int i; 372 373 if (!pool->active) 374 return; 375 376 rx_scrq = adapter->rx_scrq[pool->index]; 377 ind_bufp = &rx_scrq->ind_buf; 378 379 /* netdev_skb_alloc() could have failed after we saved a few skbs 380 * in the indir_buf and we would not have sent them to VIOS yet. 381 * To account for them, start the loop at ind_bufp->index rather 382 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 383 * be 0. 384 */ 385 for (i = ind_bufp->index; i < count; ++i) { 386 index = pool->free_map[pool->next_free]; 387 388 /* We maybe reusing the skb from earlier resets. Allocate 389 * only if necessary. But since the LTB may have changed 390 * during reset (see init_rx_pools()), update LTB below 391 * even if reusing skb. 392 */ 393 skb = pool->rx_buff[index].skb; 394 if (!skb) { 395 skb = netdev_alloc_skb(adapter->netdev, 396 pool->buff_size); 397 if (!skb) { 398 dev_err(dev, "Couldn't replenish rx buff\n"); 399 adapter->replenish_no_mem++; 400 break; 401 } 402 } 403 404 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 405 pool->next_free = (pool->next_free + 1) % pool->size; 406 407 /* Copy the skb to the long term mapped DMA buffer */ 408 offset = index * pool->buff_size; 409 dst = pool->long_term_buff.buff + offset; 410 memset(dst, 0, pool->buff_size); 411 dma_addr = pool->long_term_buff.addr + offset; 412 413 /* add the skb to an rx_buff in the pool */ 414 pool->rx_buff[index].data = dst; 415 pool->rx_buff[index].dma = dma_addr; 416 pool->rx_buff[index].skb = skb; 417 pool->rx_buff[index].pool_index = pool->index; 418 pool->rx_buff[index].size = pool->buff_size; 419 420 /* queue the rx_buff for the next send_subcrq_indirect */ 421 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 422 memset(sub_crq, 0, sizeof(*sub_crq)); 423 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 424 sub_crq->rx_add.correlator = 425 cpu_to_be64((u64)&pool->rx_buff[index]); 426 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 427 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 428 429 /* The length field of the sCRQ is defined to be 24 bits so the 430 * buffer size needs to be left shifted by a byte before it is 431 * converted to big endian to prevent the last byte from being 432 * truncated. 433 */ 434 #ifdef __LITTLE_ENDIAN__ 435 shift = 8; 436 #endif 437 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 438 439 /* if send_subcrq_indirect queue is full, flush to VIOS */ 440 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 441 i == count - 1) { 442 lpar_rc = 443 send_subcrq_indirect(adapter, handle, 444 (u64)ind_bufp->indir_dma, 445 (u64)ind_bufp->index); 446 if (lpar_rc != H_SUCCESS) 447 goto failure; 448 buffers_added += ind_bufp->index; 449 adapter->replenish_add_buff_success += ind_bufp->index; 450 ind_bufp->index = 0; 451 } 452 } 453 atomic_add(buffers_added, &pool->available); 454 return; 455 456 failure: 457 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 458 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 459 for (i = ind_bufp->index - 1; i >= 0; --i) { 460 struct ibmvnic_rx_buff *rx_buff; 461 462 pool->next_free = pool->next_free == 0 ? 463 pool->size - 1 : pool->next_free - 1; 464 sub_crq = &ind_bufp->indir_arr[i]; 465 rx_buff = (struct ibmvnic_rx_buff *) 466 be64_to_cpu(sub_crq->rx_add.correlator); 467 index = (int)(rx_buff - pool->rx_buff); 468 pool->free_map[pool->next_free] = index; 469 dev_kfree_skb_any(pool->rx_buff[index].skb); 470 pool->rx_buff[index].skb = NULL; 471 } 472 adapter->replenish_add_buff_failure += ind_bufp->index; 473 atomic_add(buffers_added, &pool->available); 474 ind_bufp->index = 0; 475 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 476 /* Disable buffer pool replenishment and report carrier off if 477 * queue is closed or pending failover. 478 * Firmware guarantees that a signal will be sent to the 479 * driver, triggering a reset. 480 */ 481 deactivate_rx_pools(adapter); 482 netif_carrier_off(adapter->netdev); 483 } 484 } 485 486 static void replenish_pools(struct ibmvnic_adapter *adapter) 487 { 488 int i; 489 490 adapter->replenish_task_cycles++; 491 for (i = 0; i < adapter->num_active_rx_pools; i++) { 492 if (adapter->rx_pool[i].active) 493 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 494 } 495 496 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 497 } 498 499 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 500 { 501 kfree(adapter->tx_stats_buffers); 502 kfree(adapter->rx_stats_buffers); 503 adapter->tx_stats_buffers = NULL; 504 adapter->rx_stats_buffers = NULL; 505 } 506 507 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 508 { 509 adapter->tx_stats_buffers = 510 kcalloc(IBMVNIC_MAX_QUEUES, 511 sizeof(struct ibmvnic_tx_queue_stats), 512 GFP_KERNEL); 513 if (!adapter->tx_stats_buffers) 514 return -ENOMEM; 515 516 adapter->rx_stats_buffers = 517 kcalloc(IBMVNIC_MAX_QUEUES, 518 sizeof(struct ibmvnic_rx_queue_stats), 519 GFP_KERNEL); 520 if (!adapter->rx_stats_buffers) 521 return -ENOMEM; 522 523 return 0; 524 } 525 526 static void release_stats_token(struct ibmvnic_adapter *adapter) 527 { 528 struct device *dev = &adapter->vdev->dev; 529 530 if (!adapter->stats_token) 531 return; 532 533 dma_unmap_single(dev, adapter->stats_token, 534 sizeof(struct ibmvnic_statistics), 535 DMA_FROM_DEVICE); 536 adapter->stats_token = 0; 537 } 538 539 static int init_stats_token(struct ibmvnic_adapter *adapter) 540 { 541 struct device *dev = &adapter->vdev->dev; 542 dma_addr_t stok; 543 544 stok = dma_map_single(dev, &adapter->stats, 545 sizeof(struct ibmvnic_statistics), 546 DMA_FROM_DEVICE); 547 if (dma_mapping_error(dev, stok)) { 548 dev_err(dev, "Couldn't map stats buffer\n"); 549 return -1; 550 } 551 552 adapter->stats_token = stok; 553 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 554 return 0; 555 } 556 557 /** 558 * release_rx_pools() - Release any rx pools attached to @adapter. 559 * @adapter: ibmvnic adapter 560 * 561 * Safe to call this multiple times - even if no pools are attached. 562 */ 563 static void release_rx_pools(struct ibmvnic_adapter *adapter) 564 { 565 struct ibmvnic_rx_pool *rx_pool; 566 int i, j; 567 568 if (!adapter->rx_pool) 569 return; 570 571 for (i = 0; i < adapter->num_active_rx_pools; i++) { 572 rx_pool = &adapter->rx_pool[i]; 573 574 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 575 576 kfree(rx_pool->free_map); 577 578 free_long_term_buff(adapter, &rx_pool->long_term_buff); 579 580 if (!rx_pool->rx_buff) 581 continue; 582 583 for (j = 0; j < rx_pool->size; j++) { 584 if (rx_pool->rx_buff[j].skb) { 585 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 586 rx_pool->rx_buff[j].skb = NULL; 587 } 588 } 589 590 kfree(rx_pool->rx_buff); 591 } 592 593 kfree(adapter->rx_pool); 594 adapter->rx_pool = NULL; 595 adapter->num_active_rx_pools = 0; 596 adapter->prev_rx_pool_size = 0; 597 } 598 599 /** 600 * reuse_rx_pools() - Check if the existing rx pools can be reused. 601 * @adapter: ibmvnic adapter 602 * 603 * Check if the existing rx pools in the adapter can be reused. The 604 * pools can be reused if the pool parameters (number of pools, 605 * number of buffers in the pool and size of each buffer) have not 606 * changed. 607 * 608 * NOTE: This assumes that all pools have the same number of buffers 609 * which is the case currently. If that changes, we must fix this. 610 * 611 * Return: true if the rx pools can be reused, false otherwise. 612 */ 613 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 614 { 615 u64 old_num_pools, new_num_pools; 616 u64 old_pool_size, new_pool_size; 617 u64 old_buff_size, new_buff_size; 618 619 if (!adapter->rx_pool) 620 return false; 621 622 old_num_pools = adapter->num_active_rx_pools; 623 new_num_pools = adapter->req_rx_queues; 624 625 old_pool_size = adapter->prev_rx_pool_size; 626 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 627 628 old_buff_size = adapter->prev_rx_buf_sz; 629 new_buff_size = adapter->cur_rx_buf_sz; 630 631 if (old_buff_size != new_buff_size || 632 old_num_pools != new_num_pools || 633 old_pool_size != new_pool_size) 634 return false; 635 636 return true; 637 } 638 639 /** 640 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 641 * @netdev: net device associated with the vnic interface 642 * 643 * Initialize the set of receiver pools in the ibmvnic adapter associated 644 * with the net_device @netdev. If possible, reuse the existing rx pools. 645 * Otherwise free any existing pools and allocate a new set of pools 646 * before initializing them. 647 * 648 * Return: 0 on success and negative value on error. 649 */ 650 static int init_rx_pools(struct net_device *netdev) 651 { 652 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 653 struct device *dev = &adapter->vdev->dev; 654 struct ibmvnic_rx_pool *rx_pool; 655 u64 num_pools; 656 u64 pool_size; /* # of buffers in one pool */ 657 u64 buff_size; 658 int i, j; 659 660 pool_size = adapter->req_rx_add_entries_per_subcrq; 661 num_pools = adapter->req_rx_queues; 662 buff_size = adapter->cur_rx_buf_sz; 663 664 if (reuse_rx_pools(adapter)) { 665 dev_dbg(dev, "Reusing rx pools\n"); 666 goto update_ltb; 667 } 668 669 /* Allocate/populate the pools. */ 670 release_rx_pools(adapter); 671 672 adapter->rx_pool = kcalloc(num_pools, 673 sizeof(struct ibmvnic_rx_pool), 674 GFP_KERNEL); 675 if (!adapter->rx_pool) { 676 dev_err(dev, "Failed to allocate rx pools\n"); 677 return -1; 678 } 679 680 /* Set num_active_rx_pools early. If we fail below after partial 681 * allocation, release_rx_pools() will know how many to look for. 682 */ 683 adapter->num_active_rx_pools = num_pools; 684 685 for (i = 0; i < num_pools; i++) { 686 rx_pool = &adapter->rx_pool[i]; 687 688 netdev_dbg(adapter->netdev, 689 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 690 i, pool_size, buff_size); 691 692 rx_pool->size = pool_size; 693 rx_pool->index = i; 694 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 695 696 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 697 GFP_KERNEL); 698 if (!rx_pool->free_map) { 699 dev_err(dev, "Couldn't alloc free_map %d\n", i); 700 goto out_release; 701 } 702 703 rx_pool->rx_buff = kcalloc(rx_pool->size, 704 sizeof(struct ibmvnic_rx_buff), 705 GFP_KERNEL); 706 if (!rx_pool->rx_buff) { 707 dev_err(dev, "Couldn't alloc rx buffers\n"); 708 goto out_release; 709 } 710 } 711 712 adapter->prev_rx_pool_size = pool_size; 713 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 714 715 update_ltb: 716 for (i = 0; i < num_pools; i++) { 717 rx_pool = &adapter->rx_pool[i]; 718 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 719 i, rx_pool->size, rx_pool->buff_size); 720 721 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 722 rx_pool->size * rx_pool->buff_size)) 723 goto out; 724 725 for (j = 0; j < rx_pool->size; ++j) { 726 struct ibmvnic_rx_buff *rx_buff; 727 728 rx_pool->free_map[j] = j; 729 730 /* NOTE: Don't clear rx_buff->skb here - will leak 731 * memory! replenish_rx_pool() will reuse skbs or 732 * allocate as necessary. 733 */ 734 rx_buff = &rx_pool->rx_buff[j]; 735 rx_buff->dma = 0; 736 rx_buff->data = 0; 737 rx_buff->size = 0; 738 rx_buff->pool_index = 0; 739 } 740 741 /* Mark pool "empty" so replenish_rx_pools() will 742 * update the LTB info for each buffer 743 */ 744 atomic_set(&rx_pool->available, 0); 745 rx_pool->next_alloc = 0; 746 rx_pool->next_free = 0; 747 /* replenish_rx_pool() may have called deactivate_rx_pools() 748 * on failover. Ensure pool is active now. 749 */ 750 rx_pool->active = 1; 751 } 752 return 0; 753 out_release: 754 release_rx_pools(adapter); 755 out: 756 /* We failed to allocate one or more LTBs or map them on the VIOS. 757 * Hold onto the pools and any LTBs that we did allocate/map. 758 */ 759 return -1; 760 } 761 762 static void release_vpd_data(struct ibmvnic_adapter *adapter) 763 { 764 if (!adapter->vpd) 765 return; 766 767 kfree(adapter->vpd->buff); 768 kfree(adapter->vpd); 769 770 adapter->vpd = NULL; 771 } 772 773 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 774 struct ibmvnic_tx_pool *tx_pool) 775 { 776 kfree(tx_pool->tx_buff); 777 kfree(tx_pool->free_map); 778 free_long_term_buff(adapter, &tx_pool->long_term_buff); 779 } 780 781 /** 782 * release_tx_pools() - Release any tx pools attached to @adapter. 783 * @adapter: ibmvnic adapter 784 * 785 * Safe to call this multiple times - even if no pools are attached. 786 */ 787 static void release_tx_pools(struct ibmvnic_adapter *adapter) 788 { 789 int i; 790 791 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 792 * both NULL or both non-NULL. So we only need to check one. 793 */ 794 if (!adapter->tx_pool) 795 return; 796 797 for (i = 0; i < adapter->num_active_tx_pools; i++) { 798 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 799 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 800 } 801 802 kfree(adapter->tx_pool); 803 adapter->tx_pool = NULL; 804 kfree(adapter->tso_pool); 805 adapter->tso_pool = NULL; 806 adapter->num_active_tx_pools = 0; 807 adapter->prev_tx_pool_size = 0; 808 } 809 810 static int init_one_tx_pool(struct net_device *netdev, 811 struct ibmvnic_tx_pool *tx_pool, 812 int pool_size, int buf_size) 813 { 814 int i; 815 816 tx_pool->tx_buff = kcalloc(pool_size, 817 sizeof(struct ibmvnic_tx_buff), 818 GFP_KERNEL); 819 if (!tx_pool->tx_buff) 820 return -1; 821 822 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 823 if (!tx_pool->free_map) { 824 kfree(tx_pool->tx_buff); 825 tx_pool->tx_buff = NULL; 826 return -1; 827 } 828 829 for (i = 0; i < pool_size; i++) 830 tx_pool->free_map[i] = i; 831 832 tx_pool->consumer_index = 0; 833 tx_pool->producer_index = 0; 834 tx_pool->num_buffers = pool_size; 835 tx_pool->buf_size = buf_size; 836 837 return 0; 838 } 839 840 /** 841 * reuse_tx_pools() - Check if the existing tx pools can be reused. 842 * @adapter: ibmvnic adapter 843 * 844 * Check if the existing tx pools in the adapter can be reused. The 845 * pools can be reused if the pool parameters (number of pools, 846 * number of buffers in the pool and mtu) have not changed. 847 * 848 * NOTE: This assumes that all pools have the same number of buffers 849 * which is the case currently. If that changes, we must fix this. 850 * 851 * Return: true if the tx pools can be reused, false otherwise. 852 */ 853 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 854 { 855 u64 old_num_pools, new_num_pools; 856 u64 old_pool_size, new_pool_size; 857 u64 old_mtu, new_mtu; 858 859 if (!adapter->tx_pool) 860 return false; 861 862 old_num_pools = adapter->num_active_tx_pools; 863 new_num_pools = adapter->num_active_tx_scrqs; 864 old_pool_size = adapter->prev_tx_pool_size; 865 new_pool_size = adapter->req_tx_entries_per_subcrq; 866 old_mtu = adapter->prev_mtu; 867 new_mtu = adapter->req_mtu; 868 869 if (old_mtu != new_mtu || 870 old_num_pools != new_num_pools || 871 old_pool_size != new_pool_size) 872 return false; 873 874 return true; 875 } 876 877 /** 878 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 879 * @netdev: net device associated with the vnic interface 880 * 881 * Initialize the set of transmit pools in the ibmvnic adapter associated 882 * with the net_device @netdev. If possible, reuse the existing tx pools. 883 * Otherwise free any existing pools and allocate a new set of pools 884 * before initializing them. 885 * 886 * Return: 0 on success and negative value on error. 887 */ 888 static int init_tx_pools(struct net_device *netdev) 889 { 890 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 891 struct device *dev = &adapter->vdev->dev; 892 int num_pools; 893 u64 pool_size; /* # of buffers in pool */ 894 u64 buff_size; 895 int i, j, rc; 896 897 num_pools = adapter->req_tx_queues; 898 899 /* We must notify the VIOS about the LTB on all resets - but we only 900 * need to alloc/populate pools if either the number of buffers or 901 * size of each buffer in the pool has changed. 902 */ 903 if (reuse_tx_pools(adapter)) { 904 netdev_dbg(netdev, "Reusing tx pools\n"); 905 goto update_ltb; 906 } 907 908 /* Allocate/populate the pools. */ 909 release_tx_pools(adapter); 910 911 pool_size = adapter->req_tx_entries_per_subcrq; 912 num_pools = adapter->num_active_tx_scrqs; 913 914 adapter->tx_pool = kcalloc(num_pools, 915 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 916 if (!adapter->tx_pool) 917 return -1; 918 919 adapter->tso_pool = kcalloc(num_pools, 920 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 921 /* To simplify release_tx_pools() ensure that ->tx_pool and 922 * ->tso_pool are either both NULL or both non-NULL. 923 */ 924 if (!adapter->tso_pool) { 925 kfree(adapter->tx_pool); 926 adapter->tx_pool = NULL; 927 return -1; 928 } 929 930 /* Set num_active_tx_pools early. If we fail below after partial 931 * allocation, release_tx_pools() will know how many to look for. 932 */ 933 adapter->num_active_tx_pools = num_pools; 934 935 buff_size = adapter->req_mtu + VLAN_HLEN; 936 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 937 938 for (i = 0; i < num_pools; i++) { 939 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 940 i, adapter->req_tx_entries_per_subcrq, buff_size); 941 942 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 943 pool_size, buff_size); 944 if (rc) 945 goto out_release; 946 947 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 948 IBMVNIC_TSO_BUFS, 949 IBMVNIC_TSO_BUF_SZ); 950 if (rc) 951 goto out_release; 952 } 953 954 adapter->prev_tx_pool_size = pool_size; 955 adapter->prev_mtu = adapter->req_mtu; 956 957 update_ltb: 958 /* NOTE: All tx_pools have the same number of buffers (which is 959 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 960 * buffers (see calls init_one_tx_pool() for these). 961 * For consistency, we use tx_pool->num_buffers and 962 * tso_pool->num_buffers below. 963 */ 964 rc = -1; 965 for (i = 0; i < num_pools; i++) { 966 struct ibmvnic_tx_pool *tso_pool; 967 struct ibmvnic_tx_pool *tx_pool; 968 u32 ltb_size; 969 970 tx_pool = &adapter->tx_pool[i]; 971 ltb_size = tx_pool->num_buffers * tx_pool->buf_size; 972 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 973 ltb_size)) 974 goto out; 975 976 dev_dbg(dev, "Updated LTB for tx pool %d [%p, %d, %d]\n", 977 i, tx_pool->long_term_buff.buff, 978 tx_pool->num_buffers, tx_pool->buf_size); 979 980 tx_pool->consumer_index = 0; 981 tx_pool->producer_index = 0; 982 983 for (j = 0; j < tx_pool->num_buffers; j++) 984 tx_pool->free_map[j] = j; 985 986 tso_pool = &adapter->tso_pool[i]; 987 ltb_size = tso_pool->num_buffers * tso_pool->buf_size; 988 if (alloc_long_term_buff(adapter, &tso_pool->long_term_buff, 989 ltb_size)) 990 goto out; 991 992 dev_dbg(dev, "Updated LTB for tso pool %d [%p, %d, %d]\n", 993 i, tso_pool->long_term_buff.buff, 994 tso_pool->num_buffers, tso_pool->buf_size); 995 996 tso_pool->consumer_index = 0; 997 tso_pool->producer_index = 0; 998 999 for (j = 0; j < tso_pool->num_buffers; j++) 1000 tso_pool->free_map[j] = j; 1001 } 1002 1003 return 0; 1004 out_release: 1005 release_tx_pools(adapter); 1006 out: 1007 /* We failed to allocate one or more LTBs or map them on the VIOS. 1008 * Hold onto the pools and any LTBs that we did allocate/map. 1009 */ 1010 return rc; 1011 } 1012 1013 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1014 { 1015 int i; 1016 1017 if (adapter->napi_enabled) 1018 return; 1019 1020 for (i = 0; i < adapter->req_rx_queues; i++) 1021 napi_enable(&adapter->napi[i]); 1022 1023 adapter->napi_enabled = true; 1024 } 1025 1026 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1027 { 1028 int i; 1029 1030 if (!adapter->napi_enabled) 1031 return; 1032 1033 for (i = 0; i < adapter->req_rx_queues; i++) { 1034 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1035 napi_disable(&adapter->napi[i]); 1036 } 1037 1038 adapter->napi_enabled = false; 1039 } 1040 1041 static int init_napi(struct ibmvnic_adapter *adapter) 1042 { 1043 int i; 1044 1045 adapter->napi = kcalloc(adapter->req_rx_queues, 1046 sizeof(struct napi_struct), GFP_KERNEL); 1047 if (!adapter->napi) 1048 return -ENOMEM; 1049 1050 for (i = 0; i < adapter->req_rx_queues; i++) { 1051 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1052 netif_napi_add(adapter->netdev, &adapter->napi[i], 1053 ibmvnic_poll, NAPI_POLL_WEIGHT); 1054 } 1055 1056 adapter->num_active_rx_napi = adapter->req_rx_queues; 1057 return 0; 1058 } 1059 1060 static void release_napi(struct ibmvnic_adapter *adapter) 1061 { 1062 int i; 1063 1064 if (!adapter->napi) 1065 return; 1066 1067 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1068 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1069 netif_napi_del(&adapter->napi[i]); 1070 } 1071 1072 kfree(adapter->napi); 1073 adapter->napi = NULL; 1074 adapter->num_active_rx_napi = 0; 1075 adapter->napi_enabled = false; 1076 } 1077 1078 static const char *adapter_state_to_string(enum vnic_state state) 1079 { 1080 switch (state) { 1081 case VNIC_PROBING: 1082 return "PROBING"; 1083 case VNIC_PROBED: 1084 return "PROBED"; 1085 case VNIC_OPENING: 1086 return "OPENING"; 1087 case VNIC_OPEN: 1088 return "OPEN"; 1089 case VNIC_CLOSING: 1090 return "CLOSING"; 1091 case VNIC_CLOSED: 1092 return "CLOSED"; 1093 case VNIC_REMOVING: 1094 return "REMOVING"; 1095 case VNIC_REMOVED: 1096 return "REMOVED"; 1097 case VNIC_DOWN: 1098 return "DOWN"; 1099 } 1100 return "UNKNOWN"; 1101 } 1102 1103 static int ibmvnic_login(struct net_device *netdev) 1104 { 1105 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1106 unsigned long timeout = msecs_to_jiffies(20000); 1107 int retry_count = 0; 1108 int retries = 10; 1109 bool retry; 1110 int rc; 1111 1112 do { 1113 retry = false; 1114 if (retry_count > retries) { 1115 netdev_warn(netdev, "Login attempts exceeded\n"); 1116 return -1; 1117 } 1118 1119 adapter->init_done_rc = 0; 1120 reinit_completion(&adapter->init_done); 1121 rc = send_login(adapter); 1122 if (rc) 1123 return rc; 1124 1125 if (!wait_for_completion_timeout(&adapter->init_done, 1126 timeout)) { 1127 netdev_warn(netdev, "Login timed out, retrying...\n"); 1128 retry = true; 1129 adapter->init_done_rc = 0; 1130 retry_count++; 1131 continue; 1132 } 1133 1134 if (adapter->init_done_rc == ABORTED) { 1135 netdev_warn(netdev, "Login aborted, retrying...\n"); 1136 retry = true; 1137 adapter->init_done_rc = 0; 1138 retry_count++; 1139 /* FW or device may be busy, so 1140 * wait a bit before retrying login 1141 */ 1142 msleep(500); 1143 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1144 retry_count++; 1145 release_sub_crqs(adapter, 1); 1146 1147 retry = true; 1148 netdev_dbg(netdev, 1149 "Received partial success, retrying...\n"); 1150 adapter->init_done_rc = 0; 1151 reinit_completion(&adapter->init_done); 1152 send_query_cap(adapter); 1153 if (!wait_for_completion_timeout(&adapter->init_done, 1154 timeout)) { 1155 netdev_warn(netdev, 1156 "Capabilities query timed out\n"); 1157 return -1; 1158 } 1159 1160 rc = init_sub_crqs(adapter); 1161 if (rc) { 1162 netdev_warn(netdev, 1163 "SCRQ initialization failed\n"); 1164 return -1; 1165 } 1166 1167 rc = init_sub_crq_irqs(adapter); 1168 if (rc) { 1169 netdev_warn(netdev, 1170 "SCRQ irq initialization failed\n"); 1171 return -1; 1172 } 1173 } else if (adapter->init_done_rc) { 1174 netdev_warn(netdev, "Adapter login failed\n"); 1175 return -1; 1176 } 1177 } while (retry); 1178 1179 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1180 1181 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1182 return 0; 1183 } 1184 1185 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1186 { 1187 kfree(adapter->login_buf); 1188 adapter->login_buf = NULL; 1189 } 1190 1191 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1192 { 1193 kfree(adapter->login_rsp_buf); 1194 adapter->login_rsp_buf = NULL; 1195 } 1196 1197 static void release_resources(struct ibmvnic_adapter *adapter) 1198 { 1199 release_vpd_data(adapter); 1200 1201 release_napi(adapter); 1202 release_login_buffer(adapter); 1203 release_login_rsp_buffer(adapter); 1204 } 1205 1206 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1207 { 1208 struct net_device *netdev = adapter->netdev; 1209 unsigned long timeout = msecs_to_jiffies(20000); 1210 union ibmvnic_crq crq; 1211 bool resend; 1212 int rc; 1213 1214 netdev_dbg(netdev, "setting link state %d\n", link_state); 1215 1216 memset(&crq, 0, sizeof(crq)); 1217 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1218 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1219 crq.logical_link_state.link_state = link_state; 1220 1221 do { 1222 resend = false; 1223 1224 reinit_completion(&adapter->init_done); 1225 rc = ibmvnic_send_crq(adapter, &crq); 1226 if (rc) { 1227 netdev_err(netdev, "Failed to set link state\n"); 1228 return rc; 1229 } 1230 1231 if (!wait_for_completion_timeout(&adapter->init_done, 1232 timeout)) { 1233 netdev_err(netdev, "timeout setting link state\n"); 1234 return -1; 1235 } 1236 1237 if (adapter->init_done_rc == PARTIALSUCCESS) { 1238 /* Partuial success, delay and re-send */ 1239 mdelay(1000); 1240 resend = true; 1241 } else if (adapter->init_done_rc) { 1242 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1243 adapter->init_done_rc); 1244 return adapter->init_done_rc; 1245 } 1246 } while (resend); 1247 1248 return 0; 1249 } 1250 1251 static int set_real_num_queues(struct net_device *netdev) 1252 { 1253 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1254 int rc; 1255 1256 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1257 adapter->req_tx_queues, adapter->req_rx_queues); 1258 1259 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1260 if (rc) { 1261 netdev_err(netdev, "failed to set the number of tx queues\n"); 1262 return rc; 1263 } 1264 1265 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1266 if (rc) 1267 netdev_err(netdev, "failed to set the number of rx queues\n"); 1268 1269 return rc; 1270 } 1271 1272 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1273 { 1274 struct device *dev = &adapter->vdev->dev; 1275 union ibmvnic_crq crq; 1276 int len = 0; 1277 int rc; 1278 1279 if (adapter->vpd->buff) 1280 len = adapter->vpd->len; 1281 1282 mutex_lock(&adapter->fw_lock); 1283 adapter->fw_done_rc = 0; 1284 reinit_completion(&adapter->fw_done); 1285 1286 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1287 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1288 rc = ibmvnic_send_crq(adapter, &crq); 1289 if (rc) { 1290 mutex_unlock(&adapter->fw_lock); 1291 return rc; 1292 } 1293 1294 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1295 if (rc) { 1296 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1297 mutex_unlock(&adapter->fw_lock); 1298 return rc; 1299 } 1300 mutex_unlock(&adapter->fw_lock); 1301 1302 if (!adapter->vpd->len) 1303 return -ENODATA; 1304 1305 if (!adapter->vpd->buff) 1306 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1307 else if (adapter->vpd->len != len) 1308 adapter->vpd->buff = 1309 krealloc(adapter->vpd->buff, 1310 adapter->vpd->len, GFP_KERNEL); 1311 1312 if (!adapter->vpd->buff) { 1313 dev_err(dev, "Could allocate VPD buffer\n"); 1314 return -ENOMEM; 1315 } 1316 1317 adapter->vpd->dma_addr = 1318 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1319 DMA_FROM_DEVICE); 1320 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1321 dev_err(dev, "Could not map VPD buffer\n"); 1322 kfree(adapter->vpd->buff); 1323 adapter->vpd->buff = NULL; 1324 return -ENOMEM; 1325 } 1326 1327 mutex_lock(&adapter->fw_lock); 1328 adapter->fw_done_rc = 0; 1329 reinit_completion(&adapter->fw_done); 1330 1331 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1332 crq.get_vpd.cmd = GET_VPD; 1333 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1334 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1335 rc = ibmvnic_send_crq(adapter, &crq); 1336 if (rc) { 1337 kfree(adapter->vpd->buff); 1338 adapter->vpd->buff = NULL; 1339 mutex_unlock(&adapter->fw_lock); 1340 return rc; 1341 } 1342 1343 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1344 if (rc) { 1345 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1346 kfree(adapter->vpd->buff); 1347 adapter->vpd->buff = NULL; 1348 mutex_unlock(&adapter->fw_lock); 1349 return rc; 1350 } 1351 1352 mutex_unlock(&adapter->fw_lock); 1353 return 0; 1354 } 1355 1356 static int init_resources(struct ibmvnic_adapter *adapter) 1357 { 1358 struct net_device *netdev = adapter->netdev; 1359 int rc; 1360 1361 rc = set_real_num_queues(netdev); 1362 if (rc) 1363 return rc; 1364 1365 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1366 if (!adapter->vpd) 1367 return -ENOMEM; 1368 1369 /* Vital Product Data (VPD) */ 1370 rc = ibmvnic_get_vpd(adapter); 1371 if (rc) { 1372 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1373 return rc; 1374 } 1375 1376 rc = init_napi(adapter); 1377 if (rc) 1378 return rc; 1379 1380 send_query_map(adapter); 1381 1382 rc = init_rx_pools(netdev); 1383 if (rc) 1384 return rc; 1385 1386 rc = init_tx_pools(netdev); 1387 return rc; 1388 } 1389 1390 static int __ibmvnic_open(struct net_device *netdev) 1391 { 1392 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1393 enum vnic_state prev_state = adapter->state; 1394 int i, rc; 1395 1396 adapter->state = VNIC_OPENING; 1397 replenish_pools(adapter); 1398 ibmvnic_napi_enable(adapter); 1399 1400 /* We're ready to receive frames, enable the sub-crq interrupts and 1401 * set the logical link state to up 1402 */ 1403 for (i = 0; i < adapter->req_rx_queues; i++) { 1404 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1405 if (prev_state == VNIC_CLOSED) 1406 enable_irq(adapter->rx_scrq[i]->irq); 1407 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1408 } 1409 1410 for (i = 0; i < adapter->req_tx_queues; i++) { 1411 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1412 if (prev_state == VNIC_CLOSED) 1413 enable_irq(adapter->tx_scrq[i]->irq); 1414 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1415 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1416 } 1417 1418 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1419 if (rc) { 1420 ibmvnic_napi_disable(adapter); 1421 release_resources(adapter); 1422 return rc; 1423 } 1424 1425 netif_tx_start_all_queues(netdev); 1426 1427 if (prev_state == VNIC_CLOSED) { 1428 for (i = 0; i < adapter->req_rx_queues; i++) 1429 napi_schedule(&adapter->napi[i]); 1430 } 1431 1432 adapter->state = VNIC_OPEN; 1433 return rc; 1434 } 1435 1436 static int ibmvnic_open(struct net_device *netdev) 1437 { 1438 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1439 int rc; 1440 1441 ASSERT_RTNL(); 1442 1443 /* If device failover is pending or we are about to reset, just set 1444 * device state and return. Device operation will be handled by reset 1445 * routine. 1446 * 1447 * It should be safe to overwrite the adapter->state here. Since 1448 * we hold the rtnl, either the reset has not actually started or 1449 * the rtnl got dropped during the set_link_state() in do_reset(). 1450 * In the former case, no one else is changing the state (again we 1451 * have the rtnl) and in the latter case, do_reset() will detect and 1452 * honor our setting below. 1453 */ 1454 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1455 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1456 adapter_state_to_string(adapter->state), 1457 adapter->failover_pending); 1458 adapter->state = VNIC_OPEN; 1459 rc = 0; 1460 goto out; 1461 } 1462 1463 if (adapter->state != VNIC_CLOSED) { 1464 rc = ibmvnic_login(netdev); 1465 if (rc) 1466 goto out; 1467 1468 rc = init_resources(adapter); 1469 if (rc) { 1470 netdev_err(netdev, "failed to initialize resources\n"); 1471 release_resources(adapter); 1472 release_rx_pools(adapter); 1473 release_tx_pools(adapter); 1474 goto out; 1475 } 1476 } 1477 1478 rc = __ibmvnic_open(netdev); 1479 1480 out: 1481 /* If open failed and there is a pending failover or in-progress reset, 1482 * set device state and return. Device operation will be handled by 1483 * reset routine. See also comments above regarding rtnl. 1484 */ 1485 if (rc && 1486 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1487 adapter->state = VNIC_OPEN; 1488 rc = 0; 1489 } 1490 return rc; 1491 } 1492 1493 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1494 { 1495 struct ibmvnic_rx_pool *rx_pool; 1496 struct ibmvnic_rx_buff *rx_buff; 1497 u64 rx_entries; 1498 int rx_scrqs; 1499 int i, j; 1500 1501 if (!adapter->rx_pool) 1502 return; 1503 1504 rx_scrqs = adapter->num_active_rx_pools; 1505 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1506 1507 /* Free any remaining skbs in the rx buffer pools */ 1508 for (i = 0; i < rx_scrqs; i++) { 1509 rx_pool = &adapter->rx_pool[i]; 1510 if (!rx_pool || !rx_pool->rx_buff) 1511 continue; 1512 1513 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1514 for (j = 0; j < rx_entries; j++) { 1515 rx_buff = &rx_pool->rx_buff[j]; 1516 if (rx_buff && rx_buff->skb) { 1517 dev_kfree_skb_any(rx_buff->skb); 1518 rx_buff->skb = NULL; 1519 } 1520 } 1521 } 1522 } 1523 1524 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1525 struct ibmvnic_tx_pool *tx_pool) 1526 { 1527 struct ibmvnic_tx_buff *tx_buff; 1528 u64 tx_entries; 1529 int i; 1530 1531 if (!tx_pool || !tx_pool->tx_buff) 1532 return; 1533 1534 tx_entries = tx_pool->num_buffers; 1535 1536 for (i = 0; i < tx_entries; i++) { 1537 tx_buff = &tx_pool->tx_buff[i]; 1538 if (tx_buff && tx_buff->skb) { 1539 dev_kfree_skb_any(tx_buff->skb); 1540 tx_buff->skb = NULL; 1541 } 1542 } 1543 } 1544 1545 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1546 { 1547 int tx_scrqs; 1548 int i; 1549 1550 if (!adapter->tx_pool || !adapter->tso_pool) 1551 return; 1552 1553 tx_scrqs = adapter->num_active_tx_pools; 1554 1555 /* Free any remaining skbs in the tx buffer pools */ 1556 for (i = 0; i < tx_scrqs; i++) { 1557 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1558 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1559 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1560 } 1561 } 1562 1563 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1564 { 1565 struct net_device *netdev = adapter->netdev; 1566 int i; 1567 1568 if (adapter->tx_scrq) { 1569 for (i = 0; i < adapter->req_tx_queues; i++) 1570 if (adapter->tx_scrq[i]->irq) { 1571 netdev_dbg(netdev, 1572 "Disabling tx_scrq[%d] irq\n", i); 1573 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1574 disable_irq(adapter->tx_scrq[i]->irq); 1575 } 1576 } 1577 1578 if (adapter->rx_scrq) { 1579 for (i = 0; i < adapter->req_rx_queues; i++) { 1580 if (adapter->rx_scrq[i]->irq) { 1581 netdev_dbg(netdev, 1582 "Disabling rx_scrq[%d] irq\n", i); 1583 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1584 disable_irq(adapter->rx_scrq[i]->irq); 1585 } 1586 } 1587 } 1588 } 1589 1590 static void ibmvnic_cleanup(struct net_device *netdev) 1591 { 1592 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1593 1594 /* ensure that transmissions are stopped if called by do_reset */ 1595 if (test_bit(0, &adapter->resetting)) 1596 netif_tx_disable(netdev); 1597 else 1598 netif_tx_stop_all_queues(netdev); 1599 1600 ibmvnic_napi_disable(adapter); 1601 ibmvnic_disable_irqs(adapter); 1602 } 1603 1604 static int __ibmvnic_close(struct net_device *netdev) 1605 { 1606 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1607 int rc = 0; 1608 1609 adapter->state = VNIC_CLOSING; 1610 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1611 adapter->state = VNIC_CLOSED; 1612 return rc; 1613 } 1614 1615 static int ibmvnic_close(struct net_device *netdev) 1616 { 1617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1618 int rc; 1619 1620 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1621 adapter_state_to_string(adapter->state), 1622 adapter->failover_pending, 1623 adapter->force_reset_recovery); 1624 1625 /* If device failover is pending, just set device state and return. 1626 * Device operation will be handled by reset routine. 1627 */ 1628 if (adapter->failover_pending) { 1629 adapter->state = VNIC_CLOSED; 1630 return 0; 1631 } 1632 1633 rc = __ibmvnic_close(netdev); 1634 ibmvnic_cleanup(netdev); 1635 clean_rx_pools(adapter); 1636 clean_tx_pools(adapter); 1637 1638 return rc; 1639 } 1640 1641 /** 1642 * build_hdr_data - creates L2/L3/L4 header data buffer 1643 * @hdr_field: bitfield determining needed headers 1644 * @skb: socket buffer 1645 * @hdr_len: array of header lengths 1646 * @hdr_data: buffer to write the header to 1647 * 1648 * Reads hdr_field to determine which headers are needed by firmware. 1649 * Builds a buffer containing these headers. Saves individual header 1650 * lengths and total buffer length to be used to build descriptors. 1651 */ 1652 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1653 int *hdr_len, u8 *hdr_data) 1654 { 1655 int len = 0; 1656 u8 *hdr; 1657 1658 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1659 hdr_len[0] = sizeof(struct vlan_ethhdr); 1660 else 1661 hdr_len[0] = sizeof(struct ethhdr); 1662 1663 if (skb->protocol == htons(ETH_P_IP)) { 1664 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1665 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1666 hdr_len[2] = tcp_hdrlen(skb); 1667 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1668 hdr_len[2] = sizeof(struct udphdr); 1669 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1670 hdr_len[1] = sizeof(struct ipv6hdr); 1671 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1672 hdr_len[2] = tcp_hdrlen(skb); 1673 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1674 hdr_len[2] = sizeof(struct udphdr); 1675 } else if (skb->protocol == htons(ETH_P_ARP)) { 1676 hdr_len[1] = arp_hdr_len(skb->dev); 1677 hdr_len[2] = 0; 1678 } 1679 1680 memset(hdr_data, 0, 120); 1681 if ((hdr_field >> 6) & 1) { 1682 hdr = skb_mac_header(skb); 1683 memcpy(hdr_data, hdr, hdr_len[0]); 1684 len += hdr_len[0]; 1685 } 1686 1687 if ((hdr_field >> 5) & 1) { 1688 hdr = skb_network_header(skb); 1689 memcpy(hdr_data + len, hdr, hdr_len[1]); 1690 len += hdr_len[1]; 1691 } 1692 1693 if ((hdr_field >> 4) & 1) { 1694 hdr = skb_transport_header(skb); 1695 memcpy(hdr_data + len, hdr, hdr_len[2]); 1696 len += hdr_len[2]; 1697 } 1698 return len; 1699 } 1700 1701 /** 1702 * create_hdr_descs - create header and header extension descriptors 1703 * @hdr_field: bitfield determining needed headers 1704 * @hdr_data: buffer containing header data 1705 * @len: length of data buffer 1706 * @hdr_len: array of individual header lengths 1707 * @scrq_arr: descriptor array 1708 * 1709 * Creates header and, if needed, header extension descriptors and 1710 * places them in a descriptor array, scrq_arr 1711 */ 1712 1713 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1714 union sub_crq *scrq_arr) 1715 { 1716 union sub_crq hdr_desc; 1717 int tmp_len = len; 1718 int num_descs = 0; 1719 u8 *data, *cur; 1720 int tmp; 1721 1722 while (tmp_len > 0) { 1723 cur = hdr_data + len - tmp_len; 1724 1725 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1726 if (cur != hdr_data) { 1727 data = hdr_desc.hdr_ext.data; 1728 tmp = tmp_len > 29 ? 29 : tmp_len; 1729 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1730 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1731 hdr_desc.hdr_ext.len = tmp; 1732 } else { 1733 data = hdr_desc.hdr.data; 1734 tmp = tmp_len > 24 ? 24 : tmp_len; 1735 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1736 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1737 hdr_desc.hdr.len = tmp; 1738 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1739 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1740 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1741 hdr_desc.hdr.flag = hdr_field << 1; 1742 } 1743 memcpy(data, cur, tmp); 1744 tmp_len -= tmp; 1745 *scrq_arr = hdr_desc; 1746 scrq_arr++; 1747 num_descs++; 1748 } 1749 1750 return num_descs; 1751 } 1752 1753 /** 1754 * build_hdr_descs_arr - build a header descriptor array 1755 * @skb: tx socket buffer 1756 * @indir_arr: indirect array 1757 * @num_entries: number of descriptors to be sent 1758 * @hdr_field: bit field determining which headers will be sent 1759 * 1760 * This function will build a TX descriptor array with applicable 1761 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1762 */ 1763 1764 static void build_hdr_descs_arr(struct sk_buff *skb, 1765 union sub_crq *indir_arr, 1766 int *num_entries, u8 hdr_field) 1767 { 1768 int hdr_len[3] = {0, 0, 0}; 1769 u8 hdr_data[140] = {0}; 1770 int tot_len; 1771 1772 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1773 hdr_data); 1774 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1775 indir_arr + 1); 1776 } 1777 1778 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1779 struct net_device *netdev) 1780 { 1781 /* For some backing devices, mishandling of small packets 1782 * can result in a loss of connection or TX stall. Device 1783 * architects recommend that no packet should be smaller 1784 * than the minimum MTU value provided to the driver, so 1785 * pad any packets to that length 1786 */ 1787 if (skb->len < netdev->min_mtu) 1788 return skb_put_padto(skb, netdev->min_mtu); 1789 1790 return 0; 1791 } 1792 1793 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1794 struct ibmvnic_sub_crq_queue *tx_scrq) 1795 { 1796 struct ibmvnic_ind_xmit_queue *ind_bufp; 1797 struct ibmvnic_tx_buff *tx_buff; 1798 struct ibmvnic_tx_pool *tx_pool; 1799 union sub_crq tx_scrq_entry; 1800 int queue_num; 1801 int entries; 1802 int index; 1803 int i; 1804 1805 ind_bufp = &tx_scrq->ind_buf; 1806 entries = (u64)ind_bufp->index; 1807 queue_num = tx_scrq->pool_index; 1808 1809 for (i = entries - 1; i >= 0; --i) { 1810 tx_scrq_entry = ind_bufp->indir_arr[i]; 1811 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1812 continue; 1813 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1814 if (index & IBMVNIC_TSO_POOL_MASK) { 1815 tx_pool = &adapter->tso_pool[queue_num]; 1816 index &= ~IBMVNIC_TSO_POOL_MASK; 1817 } else { 1818 tx_pool = &adapter->tx_pool[queue_num]; 1819 } 1820 tx_pool->free_map[tx_pool->consumer_index] = index; 1821 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1822 tx_pool->num_buffers - 1 : 1823 tx_pool->consumer_index - 1; 1824 tx_buff = &tx_pool->tx_buff[index]; 1825 adapter->netdev->stats.tx_packets--; 1826 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1827 adapter->tx_stats_buffers[queue_num].packets--; 1828 adapter->tx_stats_buffers[queue_num].bytes -= 1829 tx_buff->skb->len; 1830 dev_kfree_skb_any(tx_buff->skb); 1831 tx_buff->skb = NULL; 1832 adapter->netdev->stats.tx_dropped++; 1833 } 1834 ind_bufp->index = 0; 1835 if (atomic_sub_return(entries, &tx_scrq->used) <= 1836 (adapter->req_tx_entries_per_subcrq / 2) && 1837 __netif_subqueue_stopped(adapter->netdev, queue_num) && 1838 !test_bit(0, &adapter->resetting)) { 1839 netif_wake_subqueue(adapter->netdev, queue_num); 1840 netdev_dbg(adapter->netdev, "Started queue %d\n", 1841 queue_num); 1842 } 1843 } 1844 1845 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1846 struct ibmvnic_sub_crq_queue *tx_scrq) 1847 { 1848 struct ibmvnic_ind_xmit_queue *ind_bufp; 1849 u64 dma_addr; 1850 u64 entries; 1851 u64 handle; 1852 int rc; 1853 1854 ind_bufp = &tx_scrq->ind_buf; 1855 dma_addr = (u64)ind_bufp->indir_dma; 1856 entries = (u64)ind_bufp->index; 1857 handle = tx_scrq->handle; 1858 1859 if (!entries) 1860 return 0; 1861 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1862 if (rc) 1863 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1864 else 1865 ind_bufp->index = 0; 1866 return 0; 1867 } 1868 1869 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1870 { 1871 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1872 int queue_num = skb_get_queue_mapping(skb); 1873 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1874 struct device *dev = &adapter->vdev->dev; 1875 struct ibmvnic_ind_xmit_queue *ind_bufp; 1876 struct ibmvnic_tx_buff *tx_buff = NULL; 1877 struct ibmvnic_sub_crq_queue *tx_scrq; 1878 struct ibmvnic_tx_pool *tx_pool; 1879 unsigned int tx_send_failed = 0; 1880 netdev_tx_t ret = NETDEV_TX_OK; 1881 unsigned int tx_map_failed = 0; 1882 union sub_crq indir_arr[16]; 1883 unsigned int tx_dropped = 0; 1884 unsigned int tx_packets = 0; 1885 unsigned int tx_bytes = 0; 1886 dma_addr_t data_dma_addr; 1887 struct netdev_queue *txq; 1888 unsigned long lpar_rc; 1889 union sub_crq tx_crq; 1890 unsigned int offset; 1891 int num_entries = 1; 1892 unsigned char *dst; 1893 int index = 0; 1894 u8 proto = 0; 1895 1896 tx_scrq = adapter->tx_scrq[queue_num]; 1897 txq = netdev_get_tx_queue(netdev, queue_num); 1898 ind_bufp = &tx_scrq->ind_buf; 1899 1900 if (test_bit(0, &adapter->resetting)) { 1901 dev_kfree_skb_any(skb); 1902 1903 tx_send_failed++; 1904 tx_dropped++; 1905 ret = NETDEV_TX_OK; 1906 goto out; 1907 } 1908 1909 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1910 tx_dropped++; 1911 tx_send_failed++; 1912 ret = NETDEV_TX_OK; 1913 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1914 goto out; 1915 } 1916 if (skb_is_gso(skb)) 1917 tx_pool = &adapter->tso_pool[queue_num]; 1918 else 1919 tx_pool = &adapter->tx_pool[queue_num]; 1920 1921 index = tx_pool->free_map[tx_pool->consumer_index]; 1922 1923 if (index == IBMVNIC_INVALID_MAP) { 1924 dev_kfree_skb_any(skb); 1925 tx_send_failed++; 1926 tx_dropped++; 1927 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1928 ret = NETDEV_TX_OK; 1929 goto out; 1930 } 1931 1932 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1933 1934 offset = index * tx_pool->buf_size; 1935 dst = tx_pool->long_term_buff.buff + offset; 1936 memset(dst, 0, tx_pool->buf_size); 1937 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1938 1939 if (skb_shinfo(skb)->nr_frags) { 1940 int cur, i; 1941 1942 /* Copy the head */ 1943 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1944 cur = skb_headlen(skb); 1945 1946 /* Copy the frags */ 1947 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1948 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1949 1950 memcpy(dst + cur, skb_frag_address(frag), 1951 skb_frag_size(frag)); 1952 cur += skb_frag_size(frag); 1953 } 1954 } else { 1955 skb_copy_from_linear_data(skb, dst, skb->len); 1956 } 1957 1958 /* post changes to long_term_buff *dst before VIOS accessing it */ 1959 dma_wmb(); 1960 1961 tx_pool->consumer_index = 1962 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1963 1964 tx_buff = &tx_pool->tx_buff[index]; 1965 tx_buff->skb = skb; 1966 tx_buff->index = index; 1967 tx_buff->pool_index = queue_num; 1968 1969 memset(&tx_crq, 0, sizeof(tx_crq)); 1970 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1971 tx_crq.v1.type = IBMVNIC_TX_DESC; 1972 tx_crq.v1.n_crq_elem = 1; 1973 tx_crq.v1.n_sge = 1; 1974 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1975 1976 if (skb_is_gso(skb)) 1977 tx_crq.v1.correlator = 1978 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1979 else 1980 tx_crq.v1.correlator = cpu_to_be32(index); 1981 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1982 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1983 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1984 1985 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1986 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1987 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1988 } 1989 1990 if (skb->protocol == htons(ETH_P_IP)) { 1991 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1992 proto = ip_hdr(skb)->protocol; 1993 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1994 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1995 proto = ipv6_hdr(skb)->nexthdr; 1996 } 1997 1998 if (proto == IPPROTO_TCP) 1999 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2000 else if (proto == IPPROTO_UDP) 2001 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2002 2003 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2004 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2005 hdrs += 2; 2006 } 2007 if (skb_is_gso(skb)) { 2008 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2009 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2010 hdrs += 2; 2011 } 2012 2013 if ((*hdrs >> 7) & 1) 2014 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2015 2016 tx_crq.v1.n_crq_elem = num_entries; 2017 tx_buff->num_entries = num_entries; 2018 /* flush buffer if current entry can not fit */ 2019 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2020 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2021 if (lpar_rc != H_SUCCESS) 2022 goto tx_flush_err; 2023 } 2024 2025 indir_arr[0] = tx_crq; 2026 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2027 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2028 ind_bufp->index += num_entries; 2029 if (__netdev_tx_sent_queue(txq, skb->len, 2030 netdev_xmit_more() && 2031 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2032 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2033 if (lpar_rc != H_SUCCESS) 2034 goto tx_err; 2035 } 2036 2037 if (atomic_add_return(num_entries, &tx_scrq->used) 2038 >= adapter->req_tx_entries_per_subcrq) { 2039 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2040 netif_stop_subqueue(netdev, queue_num); 2041 } 2042 2043 tx_packets++; 2044 tx_bytes += skb->len; 2045 txq_trans_cond_update(txq); 2046 ret = NETDEV_TX_OK; 2047 goto out; 2048 2049 tx_flush_err: 2050 dev_kfree_skb_any(skb); 2051 tx_buff->skb = NULL; 2052 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2053 tx_pool->num_buffers - 1 : 2054 tx_pool->consumer_index - 1; 2055 tx_dropped++; 2056 tx_err: 2057 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2058 dev_err_ratelimited(dev, "tx: send failed\n"); 2059 2060 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2061 /* Disable TX and report carrier off if queue is closed 2062 * or pending failover. 2063 * Firmware guarantees that a signal will be sent to the 2064 * driver, triggering a reset or some other action. 2065 */ 2066 netif_tx_stop_all_queues(netdev); 2067 netif_carrier_off(netdev); 2068 } 2069 out: 2070 netdev->stats.tx_dropped += tx_dropped; 2071 netdev->stats.tx_bytes += tx_bytes; 2072 netdev->stats.tx_packets += tx_packets; 2073 adapter->tx_send_failed += tx_send_failed; 2074 adapter->tx_map_failed += tx_map_failed; 2075 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2076 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2077 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2078 2079 return ret; 2080 } 2081 2082 static void ibmvnic_set_multi(struct net_device *netdev) 2083 { 2084 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2085 struct netdev_hw_addr *ha; 2086 union ibmvnic_crq crq; 2087 2088 memset(&crq, 0, sizeof(crq)); 2089 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2090 crq.request_capability.cmd = REQUEST_CAPABILITY; 2091 2092 if (netdev->flags & IFF_PROMISC) { 2093 if (!adapter->promisc_supported) 2094 return; 2095 } else { 2096 if (netdev->flags & IFF_ALLMULTI) { 2097 /* Accept all multicast */ 2098 memset(&crq, 0, sizeof(crq)); 2099 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2100 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2101 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2102 ibmvnic_send_crq(adapter, &crq); 2103 } else if (netdev_mc_empty(netdev)) { 2104 /* Reject all multicast */ 2105 memset(&crq, 0, sizeof(crq)); 2106 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2107 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2108 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2109 ibmvnic_send_crq(adapter, &crq); 2110 } else { 2111 /* Accept one or more multicast(s) */ 2112 netdev_for_each_mc_addr(ha, netdev) { 2113 memset(&crq, 0, sizeof(crq)); 2114 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2115 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2116 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2117 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2118 ha->addr); 2119 ibmvnic_send_crq(adapter, &crq); 2120 } 2121 } 2122 } 2123 } 2124 2125 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2126 { 2127 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2128 union ibmvnic_crq crq; 2129 int rc; 2130 2131 if (!is_valid_ether_addr(dev_addr)) { 2132 rc = -EADDRNOTAVAIL; 2133 goto err; 2134 } 2135 2136 memset(&crq, 0, sizeof(crq)); 2137 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2138 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2139 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2140 2141 mutex_lock(&adapter->fw_lock); 2142 adapter->fw_done_rc = 0; 2143 reinit_completion(&adapter->fw_done); 2144 2145 rc = ibmvnic_send_crq(adapter, &crq); 2146 if (rc) { 2147 rc = -EIO; 2148 mutex_unlock(&adapter->fw_lock); 2149 goto err; 2150 } 2151 2152 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2153 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2154 if (rc || adapter->fw_done_rc) { 2155 rc = -EIO; 2156 mutex_unlock(&adapter->fw_lock); 2157 goto err; 2158 } 2159 mutex_unlock(&adapter->fw_lock); 2160 return 0; 2161 err: 2162 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2163 return rc; 2164 } 2165 2166 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2167 { 2168 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2169 struct sockaddr *addr = p; 2170 int rc; 2171 2172 rc = 0; 2173 if (!is_valid_ether_addr(addr->sa_data)) 2174 return -EADDRNOTAVAIL; 2175 2176 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2177 if (adapter->state != VNIC_PROBED) 2178 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2179 2180 return rc; 2181 } 2182 2183 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2184 { 2185 switch (reason) { 2186 case VNIC_RESET_FAILOVER: 2187 return "FAILOVER"; 2188 case VNIC_RESET_MOBILITY: 2189 return "MOBILITY"; 2190 case VNIC_RESET_FATAL: 2191 return "FATAL"; 2192 case VNIC_RESET_NON_FATAL: 2193 return "NON_FATAL"; 2194 case VNIC_RESET_TIMEOUT: 2195 return "TIMEOUT"; 2196 case VNIC_RESET_CHANGE_PARAM: 2197 return "CHANGE_PARAM"; 2198 case VNIC_RESET_PASSIVE_INIT: 2199 return "PASSIVE_INIT"; 2200 } 2201 return "UNKNOWN"; 2202 } 2203 2204 /* 2205 * do_reset returns zero if we are able to keep processing reset events, or 2206 * non-zero if we hit a fatal error and must halt. 2207 */ 2208 static int do_reset(struct ibmvnic_adapter *adapter, 2209 struct ibmvnic_rwi *rwi, u32 reset_state) 2210 { 2211 struct net_device *netdev = adapter->netdev; 2212 u64 old_num_rx_queues, old_num_tx_queues; 2213 u64 old_num_rx_slots, old_num_tx_slots; 2214 int rc; 2215 2216 netdev_dbg(adapter->netdev, 2217 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2218 adapter_state_to_string(adapter->state), 2219 adapter->failover_pending, 2220 reset_reason_to_string(rwi->reset_reason), 2221 adapter_state_to_string(reset_state)); 2222 2223 adapter->reset_reason = rwi->reset_reason; 2224 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2225 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2226 rtnl_lock(); 2227 2228 /* Now that we have the rtnl lock, clear any pending failover. 2229 * This will ensure ibmvnic_open() has either completed or will 2230 * block until failover is complete. 2231 */ 2232 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2233 adapter->failover_pending = false; 2234 2235 /* read the state and check (again) after getting rtnl */ 2236 reset_state = adapter->state; 2237 2238 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2239 rc = -EBUSY; 2240 goto out; 2241 } 2242 2243 netif_carrier_off(netdev); 2244 2245 old_num_rx_queues = adapter->req_rx_queues; 2246 old_num_tx_queues = adapter->req_tx_queues; 2247 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2248 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2249 2250 ibmvnic_cleanup(netdev); 2251 2252 if (reset_state == VNIC_OPEN && 2253 adapter->reset_reason != VNIC_RESET_MOBILITY && 2254 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2255 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2256 rc = __ibmvnic_close(netdev); 2257 if (rc) 2258 goto out; 2259 } else { 2260 adapter->state = VNIC_CLOSING; 2261 2262 /* Release the RTNL lock before link state change and 2263 * re-acquire after the link state change to allow 2264 * linkwatch_event to grab the RTNL lock and run during 2265 * a reset. 2266 */ 2267 rtnl_unlock(); 2268 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2269 rtnl_lock(); 2270 if (rc) 2271 goto out; 2272 2273 if (adapter->state == VNIC_OPEN) { 2274 /* When we dropped rtnl, ibmvnic_open() got 2275 * it and noticed that we are resetting and 2276 * set the adapter state to OPEN. Update our 2277 * new "target" state, and resume the reset 2278 * from VNIC_CLOSING state. 2279 */ 2280 netdev_dbg(netdev, 2281 "Open changed state from %s, updating.\n", 2282 adapter_state_to_string(reset_state)); 2283 reset_state = VNIC_OPEN; 2284 adapter->state = VNIC_CLOSING; 2285 } 2286 2287 if (adapter->state != VNIC_CLOSING) { 2288 /* If someone else changed the adapter state 2289 * when we dropped the rtnl, fail the reset 2290 */ 2291 rc = -1; 2292 goto out; 2293 } 2294 adapter->state = VNIC_CLOSED; 2295 } 2296 } 2297 2298 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2299 release_resources(adapter); 2300 release_sub_crqs(adapter, 1); 2301 release_crq_queue(adapter); 2302 } 2303 2304 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2305 /* remove the closed state so when we call open it appears 2306 * we are coming from the probed state. 2307 */ 2308 adapter->state = VNIC_PROBED; 2309 2310 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2311 rc = init_crq_queue(adapter); 2312 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2313 rc = ibmvnic_reenable_crq_queue(adapter); 2314 release_sub_crqs(adapter, 1); 2315 } else { 2316 rc = ibmvnic_reset_crq(adapter); 2317 if (rc == H_CLOSED || rc == H_SUCCESS) { 2318 rc = vio_enable_interrupts(adapter->vdev); 2319 if (rc) 2320 netdev_err(adapter->netdev, 2321 "Reset failed to enable interrupts. rc=%d\n", 2322 rc); 2323 } 2324 } 2325 2326 if (rc) { 2327 netdev_err(adapter->netdev, 2328 "Reset couldn't initialize crq. rc=%d\n", rc); 2329 goto out; 2330 } 2331 2332 rc = ibmvnic_reset_init(adapter, true); 2333 if (rc) { 2334 rc = IBMVNIC_INIT_FAILED; 2335 goto out; 2336 } 2337 2338 /* If the adapter was in PROBE or DOWN state prior to the reset, 2339 * exit here. 2340 */ 2341 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2342 rc = 0; 2343 goto out; 2344 } 2345 2346 rc = ibmvnic_login(netdev); 2347 if (rc) 2348 goto out; 2349 2350 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2351 rc = init_resources(adapter); 2352 if (rc) 2353 goto out; 2354 } else if (adapter->req_rx_queues != old_num_rx_queues || 2355 adapter->req_tx_queues != old_num_tx_queues || 2356 adapter->req_rx_add_entries_per_subcrq != 2357 old_num_rx_slots || 2358 adapter->req_tx_entries_per_subcrq != 2359 old_num_tx_slots || 2360 !adapter->rx_pool || 2361 !adapter->tso_pool || 2362 !adapter->tx_pool) { 2363 release_napi(adapter); 2364 release_vpd_data(adapter); 2365 2366 rc = init_resources(adapter); 2367 if (rc) 2368 goto out; 2369 2370 } else { 2371 rc = init_tx_pools(netdev); 2372 if (rc) { 2373 netdev_dbg(netdev, 2374 "init tx pools failed (%d)\n", 2375 rc); 2376 goto out; 2377 } 2378 2379 rc = init_rx_pools(netdev); 2380 if (rc) { 2381 netdev_dbg(netdev, 2382 "init rx pools failed (%d)\n", 2383 rc); 2384 goto out; 2385 } 2386 } 2387 ibmvnic_disable_irqs(adapter); 2388 } 2389 adapter->state = VNIC_CLOSED; 2390 2391 if (reset_state == VNIC_CLOSED) { 2392 rc = 0; 2393 goto out; 2394 } 2395 2396 rc = __ibmvnic_open(netdev); 2397 if (rc) { 2398 rc = IBMVNIC_OPEN_FAILED; 2399 goto out; 2400 } 2401 2402 /* refresh device's multicast list */ 2403 ibmvnic_set_multi(netdev); 2404 2405 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2406 adapter->reset_reason == VNIC_RESET_MOBILITY) 2407 __netdev_notify_peers(netdev); 2408 2409 rc = 0; 2410 2411 out: 2412 /* restore the adapter state if reset failed */ 2413 if (rc) 2414 adapter->state = reset_state; 2415 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2416 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2417 rtnl_unlock(); 2418 2419 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2420 adapter_state_to_string(adapter->state), 2421 adapter->failover_pending, rc); 2422 return rc; 2423 } 2424 2425 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2426 struct ibmvnic_rwi *rwi, u32 reset_state) 2427 { 2428 struct net_device *netdev = adapter->netdev; 2429 int rc; 2430 2431 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2432 reset_reason_to_string(rwi->reset_reason)); 2433 2434 /* read the state and check (again) after getting rtnl */ 2435 reset_state = adapter->state; 2436 2437 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2438 rc = -EBUSY; 2439 goto out; 2440 } 2441 2442 netif_carrier_off(netdev); 2443 adapter->reset_reason = rwi->reset_reason; 2444 2445 ibmvnic_cleanup(netdev); 2446 release_resources(adapter); 2447 release_sub_crqs(adapter, 0); 2448 release_crq_queue(adapter); 2449 2450 /* remove the closed state so when we call open it appears 2451 * we are coming from the probed state. 2452 */ 2453 adapter->state = VNIC_PROBED; 2454 2455 reinit_completion(&adapter->init_done); 2456 rc = init_crq_queue(adapter); 2457 if (rc) { 2458 netdev_err(adapter->netdev, 2459 "Couldn't initialize crq. rc=%d\n", rc); 2460 goto out; 2461 } 2462 2463 rc = ibmvnic_reset_init(adapter, false); 2464 if (rc) 2465 goto out; 2466 2467 /* If the adapter was in PROBE or DOWN state prior to the reset, 2468 * exit here. 2469 */ 2470 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2471 goto out; 2472 2473 rc = ibmvnic_login(netdev); 2474 if (rc) 2475 goto out; 2476 2477 rc = init_resources(adapter); 2478 if (rc) 2479 goto out; 2480 2481 ibmvnic_disable_irqs(adapter); 2482 adapter->state = VNIC_CLOSED; 2483 2484 if (reset_state == VNIC_CLOSED) 2485 goto out; 2486 2487 rc = __ibmvnic_open(netdev); 2488 if (rc) { 2489 rc = IBMVNIC_OPEN_FAILED; 2490 goto out; 2491 } 2492 2493 __netdev_notify_peers(netdev); 2494 out: 2495 /* restore adapter state if reset failed */ 2496 if (rc) 2497 adapter->state = reset_state; 2498 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2499 adapter_state_to_string(adapter->state), 2500 adapter->failover_pending, rc); 2501 return rc; 2502 } 2503 2504 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2505 { 2506 struct ibmvnic_rwi *rwi; 2507 unsigned long flags; 2508 2509 spin_lock_irqsave(&adapter->rwi_lock, flags); 2510 2511 if (!list_empty(&adapter->rwi_list)) { 2512 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2513 list); 2514 list_del(&rwi->list); 2515 } else { 2516 rwi = NULL; 2517 } 2518 2519 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2520 return rwi; 2521 } 2522 2523 /** 2524 * do_passive_init - complete probing when partner device is detected. 2525 * @adapter: ibmvnic_adapter struct 2526 * 2527 * If the ibmvnic device does not have a partner device to communicate with at boot 2528 * and that partner device comes online at a later time, this function is called 2529 * to complete the initialization process of ibmvnic device. 2530 * Caller is expected to hold rtnl_lock(). 2531 * 2532 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2533 * in the down state. 2534 * Returns 0 upon success and the device is in PROBED state. 2535 */ 2536 2537 static int do_passive_init(struct ibmvnic_adapter *adapter) 2538 { 2539 unsigned long timeout = msecs_to_jiffies(30000); 2540 struct net_device *netdev = adapter->netdev; 2541 struct device *dev = &adapter->vdev->dev; 2542 int rc; 2543 2544 netdev_dbg(netdev, "Partner device found, probing.\n"); 2545 2546 adapter->state = VNIC_PROBING; 2547 reinit_completion(&adapter->init_done); 2548 adapter->init_done_rc = 0; 2549 adapter->crq.active = true; 2550 2551 rc = send_crq_init_complete(adapter); 2552 if (rc) 2553 goto out; 2554 2555 rc = send_version_xchg(adapter); 2556 if (rc) 2557 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2558 2559 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2560 dev_err(dev, "Initialization sequence timed out\n"); 2561 rc = -ETIMEDOUT; 2562 goto out; 2563 } 2564 2565 rc = init_sub_crqs(adapter); 2566 if (rc) { 2567 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2568 goto out; 2569 } 2570 2571 rc = init_sub_crq_irqs(adapter); 2572 if (rc) { 2573 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2574 goto init_failed; 2575 } 2576 2577 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2578 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2579 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2580 2581 adapter->state = VNIC_PROBED; 2582 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2583 2584 return 0; 2585 2586 init_failed: 2587 release_sub_crqs(adapter, 1); 2588 out: 2589 adapter->state = VNIC_DOWN; 2590 return rc; 2591 } 2592 2593 static void __ibmvnic_reset(struct work_struct *work) 2594 { 2595 struct ibmvnic_adapter *adapter; 2596 bool saved_state = false; 2597 struct ibmvnic_rwi *tmprwi; 2598 struct ibmvnic_rwi *rwi; 2599 unsigned long flags; 2600 u32 reset_state; 2601 int rc = 0; 2602 2603 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2604 2605 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2606 queue_delayed_work(system_long_wq, 2607 &adapter->ibmvnic_delayed_reset, 2608 IBMVNIC_RESET_DELAY); 2609 return; 2610 } 2611 2612 rwi = get_next_rwi(adapter); 2613 while (rwi) { 2614 spin_lock_irqsave(&adapter->state_lock, flags); 2615 2616 if (adapter->state == VNIC_REMOVING || 2617 adapter->state == VNIC_REMOVED) { 2618 spin_unlock_irqrestore(&adapter->state_lock, flags); 2619 kfree(rwi); 2620 rc = EBUSY; 2621 break; 2622 } 2623 2624 if (!saved_state) { 2625 reset_state = adapter->state; 2626 saved_state = true; 2627 } 2628 spin_unlock_irqrestore(&adapter->state_lock, flags); 2629 2630 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2631 rtnl_lock(); 2632 rc = do_passive_init(adapter); 2633 rtnl_unlock(); 2634 if (!rc) 2635 netif_carrier_on(adapter->netdev); 2636 } else if (adapter->force_reset_recovery) { 2637 /* Since we are doing a hard reset now, clear the 2638 * failover_pending flag so we don't ignore any 2639 * future MOBILITY or other resets. 2640 */ 2641 adapter->failover_pending = false; 2642 2643 /* Transport event occurred during previous reset */ 2644 if (adapter->wait_for_reset) { 2645 /* Previous was CHANGE_PARAM; caller locked */ 2646 adapter->force_reset_recovery = false; 2647 rc = do_hard_reset(adapter, rwi, reset_state); 2648 } else { 2649 rtnl_lock(); 2650 adapter->force_reset_recovery = false; 2651 rc = do_hard_reset(adapter, rwi, reset_state); 2652 rtnl_unlock(); 2653 } 2654 if (rc) { 2655 /* give backing device time to settle down */ 2656 netdev_dbg(adapter->netdev, 2657 "[S:%s] Hard reset failed, waiting 60 secs\n", 2658 adapter_state_to_string(adapter->state)); 2659 set_current_state(TASK_UNINTERRUPTIBLE); 2660 schedule_timeout(60 * HZ); 2661 } 2662 } else { 2663 rc = do_reset(adapter, rwi, reset_state); 2664 } 2665 tmprwi = rwi; 2666 adapter->last_reset_time = jiffies; 2667 2668 if (rc) 2669 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2670 2671 rwi = get_next_rwi(adapter); 2672 2673 /* 2674 * If there is another reset queued, free the previous rwi 2675 * and process the new reset even if previous reset failed 2676 * (the previous reset could have failed because of a fail 2677 * over for instance, so process the fail over). 2678 * 2679 * If there are no resets queued and the previous reset failed, 2680 * the adapter would be in an undefined state. So retry the 2681 * previous reset as a hard reset. 2682 */ 2683 if (rwi) 2684 kfree(tmprwi); 2685 else if (rc) 2686 rwi = tmprwi; 2687 2688 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2689 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2690 adapter->force_reset_recovery = true; 2691 } 2692 2693 if (adapter->wait_for_reset) { 2694 adapter->reset_done_rc = rc; 2695 complete(&adapter->reset_done); 2696 } 2697 2698 clear_bit_unlock(0, &adapter->resetting); 2699 2700 netdev_dbg(adapter->netdev, 2701 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2702 adapter_state_to_string(adapter->state), 2703 adapter->force_reset_recovery, 2704 adapter->wait_for_reset); 2705 } 2706 2707 static void __ibmvnic_delayed_reset(struct work_struct *work) 2708 { 2709 struct ibmvnic_adapter *adapter; 2710 2711 adapter = container_of(work, struct ibmvnic_adapter, 2712 ibmvnic_delayed_reset.work); 2713 __ibmvnic_reset(&adapter->ibmvnic_reset); 2714 } 2715 2716 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2717 enum ibmvnic_reset_reason reason) 2718 { 2719 struct list_head *entry, *tmp_entry; 2720 struct ibmvnic_rwi *rwi, *tmp; 2721 struct net_device *netdev = adapter->netdev; 2722 unsigned long flags; 2723 int ret; 2724 2725 spin_lock_irqsave(&adapter->rwi_lock, flags); 2726 2727 /* If failover is pending don't schedule any other reset. 2728 * Instead let the failover complete. If there is already a 2729 * a failover reset scheduled, we will detect and drop the 2730 * duplicate reset when walking the ->rwi_list below. 2731 */ 2732 if (adapter->state == VNIC_REMOVING || 2733 adapter->state == VNIC_REMOVED || 2734 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2735 ret = EBUSY; 2736 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2737 goto err; 2738 } 2739 2740 if (adapter->state == VNIC_PROBING) { 2741 netdev_warn(netdev, "Adapter reset during probe\n"); 2742 adapter->init_done_rc = -EAGAIN; 2743 ret = EAGAIN; 2744 goto err; 2745 } 2746 2747 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2748 if (tmp->reset_reason == reason) { 2749 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2750 reset_reason_to_string(reason)); 2751 ret = EBUSY; 2752 goto err; 2753 } 2754 } 2755 2756 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2757 if (!rwi) { 2758 ret = ENOMEM; 2759 goto err; 2760 } 2761 /* if we just received a transport event, 2762 * flush reset queue and process this reset 2763 */ 2764 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2765 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2766 list_del(entry); 2767 } 2768 rwi->reset_reason = reason; 2769 list_add_tail(&rwi->list, &adapter->rwi_list); 2770 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2771 reset_reason_to_string(reason)); 2772 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2773 2774 ret = 0; 2775 err: 2776 /* ibmvnic_close() below can block, so drop the lock first */ 2777 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2778 2779 if (ret == ENOMEM) 2780 ibmvnic_close(netdev); 2781 2782 return -ret; 2783 } 2784 2785 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2786 { 2787 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2788 2789 if (test_bit(0, &adapter->resetting)) { 2790 netdev_err(adapter->netdev, 2791 "Adapter is resetting, skip timeout reset\n"); 2792 return; 2793 } 2794 /* No queuing up reset until at least 5 seconds (default watchdog val) 2795 * after last reset 2796 */ 2797 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2798 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2799 return; 2800 } 2801 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2802 } 2803 2804 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2805 struct ibmvnic_rx_buff *rx_buff) 2806 { 2807 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2808 2809 rx_buff->skb = NULL; 2810 2811 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2812 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2813 2814 atomic_dec(&pool->available); 2815 } 2816 2817 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2818 { 2819 struct ibmvnic_sub_crq_queue *rx_scrq; 2820 struct ibmvnic_adapter *adapter; 2821 struct net_device *netdev; 2822 int frames_processed; 2823 int scrq_num; 2824 2825 netdev = napi->dev; 2826 adapter = netdev_priv(netdev); 2827 scrq_num = (int)(napi - adapter->napi); 2828 frames_processed = 0; 2829 rx_scrq = adapter->rx_scrq[scrq_num]; 2830 2831 restart_poll: 2832 while (frames_processed < budget) { 2833 struct sk_buff *skb; 2834 struct ibmvnic_rx_buff *rx_buff; 2835 union sub_crq *next; 2836 u32 length; 2837 u16 offset; 2838 u8 flags = 0; 2839 2840 if (unlikely(test_bit(0, &adapter->resetting) && 2841 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2842 enable_scrq_irq(adapter, rx_scrq); 2843 napi_complete_done(napi, frames_processed); 2844 return frames_processed; 2845 } 2846 2847 if (!pending_scrq(adapter, rx_scrq)) 2848 break; 2849 next = ibmvnic_next_scrq(adapter, rx_scrq); 2850 rx_buff = (struct ibmvnic_rx_buff *) 2851 be64_to_cpu(next->rx_comp.correlator); 2852 /* do error checking */ 2853 if (next->rx_comp.rc) { 2854 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2855 be16_to_cpu(next->rx_comp.rc)); 2856 /* free the entry */ 2857 next->rx_comp.first = 0; 2858 dev_kfree_skb_any(rx_buff->skb); 2859 remove_buff_from_pool(adapter, rx_buff); 2860 continue; 2861 } else if (!rx_buff->skb) { 2862 /* free the entry */ 2863 next->rx_comp.first = 0; 2864 remove_buff_from_pool(adapter, rx_buff); 2865 continue; 2866 } 2867 2868 length = be32_to_cpu(next->rx_comp.len); 2869 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2870 flags = next->rx_comp.flags; 2871 skb = rx_buff->skb; 2872 /* load long_term_buff before copying to skb */ 2873 dma_rmb(); 2874 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2875 length); 2876 2877 /* VLAN Header has been stripped by the system firmware and 2878 * needs to be inserted by the driver 2879 */ 2880 if (adapter->rx_vlan_header_insertion && 2881 (flags & IBMVNIC_VLAN_STRIPPED)) 2882 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2883 ntohs(next->rx_comp.vlan_tci)); 2884 2885 /* free the entry */ 2886 next->rx_comp.first = 0; 2887 remove_buff_from_pool(adapter, rx_buff); 2888 2889 skb_put(skb, length); 2890 skb->protocol = eth_type_trans(skb, netdev); 2891 skb_record_rx_queue(skb, scrq_num); 2892 2893 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2894 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2895 skb->ip_summed = CHECKSUM_UNNECESSARY; 2896 } 2897 2898 length = skb->len; 2899 napi_gro_receive(napi, skb); /* send it up */ 2900 netdev->stats.rx_packets++; 2901 netdev->stats.rx_bytes += length; 2902 adapter->rx_stats_buffers[scrq_num].packets++; 2903 adapter->rx_stats_buffers[scrq_num].bytes += length; 2904 frames_processed++; 2905 } 2906 2907 if (adapter->state != VNIC_CLOSING && 2908 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2909 adapter->req_rx_add_entries_per_subcrq / 2) || 2910 frames_processed < budget)) 2911 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2912 if (frames_processed < budget) { 2913 if (napi_complete_done(napi, frames_processed)) { 2914 enable_scrq_irq(adapter, rx_scrq); 2915 if (pending_scrq(adapter, rx_scrq)) { 2916 if (napi_reschedule(napi)) { 2917 disable_scrq_irq(adapter, rx_scrq); 2918 goto restart_poll; 2919 } 2920 } 2921 } 2922 } 2923 return frames_processed; 2924 } 2925 2926 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2927 { 2928 int rc, ret; 2929 2930 adapter->fallback.mtu = adapter->req_mtu; 2931 adapter->fallback.rx_queues = adapter->req_rx_queues; 2932 adapter->fallback.tx_queues = adapter->req_tx_queues; 2933 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2934 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2935 2936 reinit_completion(&adapter->reset_done); 2937 adapter->wait_for_reset = true; 2938 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2939 2940 if (rc) { 2941 ret = rc; 2942 goto out; 2943 } 2944 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2945 if (rc) { 2946 ret = -ENODEV; 2947 goto out; 2948 } 2949 2950 ret = 0; 2951 if (adapter->reset_done_rc) { 2952 ret = -EIO; 2953 adapter->desired.mtu = adapter->fallback.mtu; 2954 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2955 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2956 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2957 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2958 2959 reinit_completion(&adapter->reset_done); 2960 adapter->wait_for_reset = true; 2961 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2962 if (rc) { 2963 ret = rc; 2964 goto out; 2965 } 2966 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2967 60000); 2968 if (rc) { 2969 ret = -ENODEV; 2970 goto out; 2971 } 2972 } 2973 out: 2974 adapter->wait_for_reset = false; 2975 2976 return ret; 2977 } 2978 2979 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2980 { 2981 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2982 2983 adapter->desired.mtu = new_mtu + ETH_HLEN; 2984 2985 return wait_for_reset(adapter); 2986 } 2987 2988 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2989 struct net_device *dev, 2990 netdev_features_t features) 2991 { 2992 /* Some backing hardware adapters can not 2993 * handle packets with a MSS less than 224 2994 * or with only one segment. 2995 */ 2996 if (skb_is_gso(skb)) { 2997 if (skb_shinfo(skb)->gso_size < 224 || 2998 skb_shinfo(skb)->gso_segs == 1) 2999 features &= ~NETIF_F_GSO_MASK; 3000 } 3001 3002 return features; 3003 } 3004 3005 static const struct net_device_ops ibmvnic_netdev_ops = { 3006 .ndo_open = ibmvnic_open, 3007 .ndo_stop = ibmvnic_close, 3008 .ndo_start_xmit = ibmvnic_xmit, 3009 .ndo_set_rx_mode = ibmvnic_set_multi, 3010 .ndo_set_mac_address = ibmvnic_set_mac, 3011 .ndo_validate_addr = eth_validate_addr, 3012 .ndo_tx_timeout = ibmvnic_tx_timeout, 3013 .ndo_change_mtu = ibmvnic_change_mtu, 3014 .ndo_features_check = ibmvnic_features_check, 3015 }; 3016 3017 /* ethtool functions */ 3018 3019 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3020 struct ethtool_link_ksettings *cmd) 3021 { 3022 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3023 int rc; 3024 3025 rc = send_query_phys_parms(adapter); 3026 if (rc) { 3027 adapter->speed = SPEED_UNKNOWN; 3028 adapter->duplex = DUPLEX_UNKNOWN; 3029 } 3030 cmd->base.speed = adapter->speed; 3031 cmd->base.duplex = adapter->duplex; 3032 cmd->base.port = PORT_FIBRE; 3033 cmd->base.phy_address = 0; 3034 cmd->base.autoneg = AUTONEG_ENABLE; 3035 3036 return 0; 3037 } 3038 3039 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3040 struct ethtool_drvinfo *info) 3041 { 3042 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3043 3044 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3045 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3046 strscpy(info->fw_version, adapter->fw_version, 3047 sizeof(info->fw_version)); 3048 } 3049 3050 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3051 { 3052 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3053 3054 return adapter->msg_enable; 3055 } 3056 3057 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3058 { 3059 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3060 3061 adapter->msg_enable = data; 3062 } 3063 3064 static u32 ibmvnic_get_link(struct net_device *netdev) 3065 { 3066 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3067 3068 /* Don't need to send a query because we request a logical link up at 3069 * init and then we wait for link state indications 3070 */ 3071 return adapter->logical_link_state; 3072 } 3073 3074 static void ibmvnic_get_ringparam(struct net_device *netdev, 3075 struct ethtool_ringparam *ring, 3076 struct kernel_ethtool_ringparam *kernel_ring, 3077 struct netlink_ext_ack *extack) 3078 { 3079 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3080 3081 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3082 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3083 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3084 } else { 3085 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3086 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3087 } 3088 ring->rx_mini_max_pending = 0; 3089 ring->rx_jumbo_max_pending = 0; 3090 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3091 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3092 ring->rx_mini_pending = 0; 3093 ring->rx_jumbo_pending = 0; 3094 } 3095 3096 static int ibmvnic_set_ringparam(struct net_device *netdev, 3097 struct ethtool_ringparam *ring, 3098 struct kernel_ethtool_ringparam *kernel_ring, 3099 struct netlink_ext_ack *extack) 3100 { 3101 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3102 int ret; 3103 3104 ret = 0; 3105 adapter->desired.rx_entries = ring->rx_pending; 3106 adapter->desired.tx_entries = ring->tx_pending; 3107 3108 ret = wait_for_reset(adapter); 3109 3110 if (!ret && 3111 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 3112 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 3113 netdev_info(netdev, 3114 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3115 ring->rx_pending, ring->tx_pending, 3116 adapter->req_rx_add_entries_per_subcrq, 3117 adapter->req_tx_entries_per_subcrq); 3118 return ret; 3119 } 3120 3121 static void ibmvnic_get_channels(struct net_device *netdev, 3122 struct ethtool_channels *channels) 3123 { 3124 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3125 3126 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3127 channels->max_rx = adapter->max_rx_queues; 3128 channels->max_tx = adapter->max_tx_queues; 3129 } else { 3130 channels->max_rx = IBMVNIC_MAX_QUEUES; 3131 channels->max_tx = IBMVNIC_MAX_QUEUES; 3132 } 3133 3134 channels->max_other = 0; 3135 channels->max_combined = 0; 3136 channels->rx_count = adapter->req_rx_queues; 3137 channels->tx_count = adapter->req_tx_queues; 3138 channels->other_count = 0; 3139 channels->combined_count = 0; 3140 } 3141 3142 static int ibmvnic_set_channels(struct net_device *netdev, 3143 struct ethtool_channels *channels) 3144 { 3145 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3146 int ret; 3147 3148 ret = 0; 3149 adapter->desired.rx_queues = channels->rx_count; 3150 adapter->desired.tx_queues = channels->tx_count; 3151 3152 ret = wait_for_reset(adapter); 3153 3154 if (!ret && 3155 (adapter->req_rx_queues != channels->rx_count || 3156 adapter->req_tx_queues != channels->tx_count)) 3157 netdev_info(netdev, 3158 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3159 channels->rx_count, channels->tx_count, 3160 adapter->req_rx_queues, adapter->req_tx_queues); 3161 return ret; 3162 } 3163 3164 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3165 { 3166 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3167 int i; 3168 3169 switch (stringset) { 3170 case ETH_SS_STATS: 3171 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 3172 i++, data += ETH_GSTRING_LEN) 3173 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3174 3175 for (i = 0; i < adapter->req_tx_queues; i++) { 3176 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3177 data += ETH_GSTRING_LEN; 3178 3179 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3180 data += ETH_GSTRING_LEN; 3181 3182 snprintf(data, ETH_GSTRING_LEN, 3183 "tx%d_dropped_packets", i); 3184 data += ETH_GSTRING_LEN; 3185 } 3186 3187 for (i = 0; i < adapter->req_rx_queues; i++) { 3188 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3189 data += ETH_GSTRING_LEN; 3190 3191 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3192 data += ETH_GSTRING_LEN; 3193 3194 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3195 data += ETH_GSTRING_LEN; 3196 } 3197 break; 3198 3199 case ETH_SS_PRIV_FLAGS: 3200 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3201 strcpy(data + i * ETH_GSTRING_LEN, 3202 ibmvnic_priv_flags[i]); 3203 break; 3204 default: 3205 return; 3206 } 3207 } 3208 3209 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3210 { 3211 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3212 3213 switch (sset) { 3214 case ETH_SS_STATS: 3215 return ARRAY_SIZE(ibmvnic_stats) + 3216 adapter->req_tx_queues * NUM_TX_STATS + 3217 adapter->req_rx_queues * NUM_RX_STATS; 3218 case ETH_SS_PRIV_FLAGS: 3219 return ARRAY_SIZE(ibmvnic_priv_flags); 3220 default: 3221 return -EOPNOTSUPP; 3222 } 3223 } 3224 3225 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3226 struct ethtool_stats *stats, u64 *data) 3227 { 3228 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3229 union ibmvnic_crq crq; 3230 int i, j; 3231 int rc; 3232 3233 memset(&crq, 0, sizeof(crq)); 3234 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3235 crq.request_statistics.cmd = REQUEST_STATISTICS; 3236 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3237 crq.request_statistics.len = 3238 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3239 3240 /* Wait for data to be written */ 3241 reinit_completion(&adapter->stats_done); 3242 rc = ibmvnic_send_crq(adapter, &crq); 3243 if (rc) 3244 return; 3245 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3246 if (rc) 3247 return; 3248 3249 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3250 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3251 (adapter, ibmvnic_stats[i].offset)); 3252 3253 for (j = 0; j < adapter->req_tx_queues; j++) { 3254 data[i] = adapter->tx_stats_buffers[j].packets; 3255 i++; 3256 data[i] = adapter->tx_stats_buffers[j].bytes; 3257 i++; 3258 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3259 i++; 3260 } 3261 3262 for (j = 0; j < adapter->req_rx_queues; j++) { 3263 data[i] = adapter->rx_stats_buffers[j].packets; 3264 i++; 3265 data[i] = adapter->rx_stats_buffers[j].bytes; 3266 i++; 3267 data[i] = adapter->rx_stats_buffers[j].interrupts; 3268 i++; 3269 } 3270 } 3271 3272 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3273 { 3274 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3275 3276 return adapter->priv_flags; 3277 } 3278 3279 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3280 { 3281 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3282 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3283 3284 if (which_maxes) 3285 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3286 else 3287 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3288 3289 return 0; 3290 } 3291 3292 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3293 .get_drvinfo = ibmvnic_get_drvinfo, 3294 .get_msglevel = ibmvnic_get_msglevel, 3295 .set_msglevel = ibmvnic_set_msglevel, 3296 .get_link = ibmvnic_get_link, 3297 .get_ringparam = ibmvnic_get_ringparam, 3298 .set_ringparam = ibmvnic_set_ringparam, 3299 .get_channels = ibmvnic_get_channels, 3300 .set_channels = ibmvnic_set_channels, 3301 .get_strings = ibmvnic_get_strings, 3302 .get_sset_count = ibmvnic_get_sset_count, 3303 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3304 .get_link_ksettings = ibmvnic_get_link_ksettings, 3305 .get_priv_flags = ibmvnic_get_priv_flags, 3306 .set_priv_flags = ibmvnic_set_priv_flags, 3307 }; 3308 3309 /* Routines for managing CRQs/sCRQs */ 3310 3311 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3312 struct ibmvnic_sub_crq_queue *scrq) 3313 { 3314 int rc; 3315 3316 if (!scrq) { 3317 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3318 return -EINVAL; 3319 } 3320 3321 if (scrq->irq) { 3322 free_irq(scrq->irq, scrq); 3323 irq_dispose_mapping(scrq->irq); 3324 scrq->irq = 0; 3325 } 3326 3327 if (scrq->msgs) { 3328 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3329 atomic_set(&scrq->used, 0); 3330 scrq->cur = 0; 3331 scrq->ind_buf.index = 0; 3332 } else { 3333 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3334 return -EINVAL; 3335 } 3336 3337 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3338 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3339 return rc; 3340 } 3341 3342 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3343 { 3344 int i, rc; 3345 3346 if (!adapter->tx_scrq || !adapter->rx_scrq) 3347 return -EINVAL; 3348 3349 for (i = 0; i < adapter->req_tx_queues; i++) { 3350 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3351 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3352 if (rc) 3353 return rc; 3354 } 3355 3356 for (i = 0; i < adapter->req_rx_queues; i++) { 3357 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3358 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3359 if (rc) 3360 return rc; 3361 } 3362 3363 return rc; 3364 } 3365 3366 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3367 struct ibmvnic_sub_crq_queue *scrq, 3368 bool do_h_free) 3369 { 3370 struct device *dev = &adapter->vdev->dev; 3371 long rc; 3372 3373 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3374 3375 if (do_h_free) { 3376 /* Close the sub-crqs */ 3377 do { 3378 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3379 adapter->vdev->unit_address, 3380 scrq->crq_num); 3381 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3382 3383 if (rc) { 3384 netdev_err(adapter->netdev, 3385 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3386 scrq->crq_num, rc); 3387 } 3388 } 3389 3390 dma_free_coherent(dev, 3391 IBMVNIC_IND_ARR_SZ, 3392 scrq->ind_buf.indir_arr, 3393 scrq->ind_buf.indir_dma); 3394 3395 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3396 DMA_BIDIRECTIONAL); 3397 free_pages((unsigned long)scrq->msgs, 2); 3398 kfree(scrq); 3399 } 3400 3401 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3402 *adapter) 3403 { 3404 struct device *dev = &adapter->vdev->dev; 3405 struct ibmvnic_sub_crq_queue *scrq; 3406 int rc; 3407 3408 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3409 if (!scrq) 3410 return NULL; 3411 3412 scrq->msgs = 3413 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3414 if (!scrq->msgs) { 3415 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3416 goto zero_page_failed; 3417 } 3418 3419 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3420 DMA_BIDIRECTIONAL); 3421 if (dma_mapping_error(dev, scrq->msg_token)) { 3422 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3423 goto map_failed; 3424 } 3425 3426 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3427 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3428 3429 if (rc == H_RESOURCE) 3430 rc = ibmvnic_reset_crq(adapter); 3431 3432 if (rc == H_CLOSED) { 3433 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3434 } else if (rc) { 3435 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3436 goto reg_failed; 3437 } 3438 3439 scrq->adapter = adapter; 3440 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3441 scrq->ind_buf.index = 0; 3442 3443 scrq->ind_buf.indir_arr = 3444 dma_alloc_coherent(dev, 3445 IBMVNIC_IND_ARR_SZ, 3446 &scrq->ind_buf.indir_dma, 3447 GFP_KERNEL); 3448 3449 if (!scrq->ind_buf.indir_arr) 3450 goto indir_failed; 3451 3452 spin_lock_init(&scrq->lock); 3453 3454 netdev_dbg(adapter->netdev, 3455 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3456 scrq->crq_num, scrq->hw_irq, scrq->irq); 3457 3458 return scrq; 3459 3460 indir_failed: 3461 do { 3462 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3463 adapter->vdev->unit_address, 3464 scrq->crq_num); 3465 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3466 reg_failed: 3467 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3468 DMA_BIDIRECTIONAL); 3469 map_failed: 3470 free_pages((unsigned long)scrq->msgs, 2); 3471 zero_page_failed: 3472 kfree(scrq); 3473 3474 return NULL; 3475 } 3476 3477 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3478 { 3479 int i; 3480 3481 if (adapter->tx_scrq) { 3482 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3483 if (!adapter->tx_scrq[i]) 3484 continue; 3485 3486 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3487 i); 3488 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3489 if (adapter->tx_scrq[i]->irq) { 3490 free_irq(adapter->tx_scrq[i]->irq, 3491 adapter->tx_scrq[i]); 3492 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3493 adapter->tx_scrq[i]->irq = 0; 3494 } 3495 3496 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3497 do_h_free); 3498 } 3499 3500 kfree(adapter->tx_scrq); 3501 adapter->tx_scrq = NULL; 3502 adapter->num_active_tx_scrqs = 0; 3503 } 3504 3505 if (adapter->rx_scrq) { 3506 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3507 if (!adapter->rx_scrq[i]) 3508 continue; 3509 3510 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3511 i); 3512 if (adapter->rx_scrq[i]->irq) { 3513 free_irq(adapter->rx_scrq[i]->irq, 3514 adapter->rx_scrq[i]); 3515 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3516 adapter->rx_scrq[i]->irq = 0; 3517 } 3518 3519 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3520 do_h_free); 3521 } 3522 3523 kfree(adapter->rx_scrq); 3524 adapter->rx_scrq = NULL; 3525 adapter->num_active_rx_scrqs = 0; 3526 } 3527 } 3528 3529 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3530 struct ibmvnic_sub_crq_queue *scrq) 3531 { 3532 struct device *dev = &adapter->vdev->dev; 3533 unsigned long rc; 3534 3535 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3536 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3537 if (rc) 3538 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3539 scrq->hw_irq, rc); 3540 return rc; 3541 } 3542 3543 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3544 struct ibmvnic_sub_crq_queue *scrq) 3545 { 3546 struct device *dev = &adapter->vdev->dev; 3547 unsigned long rc; 3548 3549 if (scrq->hw_irq > 0x100000000ULL) { 3550 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3551 return 1; 3552 } 3553 3554 if (test_bit(0, &adapter->resetting) && 3555 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3556 u64 val = (0xff000000) | scrq->hw_irq; 3557 3558 rc = plpar_hcall_norets(H_EOI, val); 3559 /* H_EOI would fail with rc = H_FUNCTION when running 3560 * in XIVE mode which is expected, but not an error. 3561 */ 3562 if (rc && (rc != H_FUNCTION)) 3563 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3564 val, rc); 3565 } 3566 3567 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3568 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3569 if (rc) 3570 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3571 scrq->hw_irq, rc); 3572 return rc; 3573 } 3574 3575 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3576 struct ibmvnic_sub_crq_queue *scrq) 3577 { 3578 struct device *dev = &adapter->vdev->dev; 3579 struct ibmvnic_tx_pool *tx_pool; 3580 struct ibmvnic_tx_buff *txbuff; 3581 struct netdev_queue *txq; 3582 union sub_crq *next; 3583 int index; 3584 int i; 3585 3586 restart_loop: 3587 while (pending_scrq(adapter, scrq)) { 3588 unsigned int pool = scrq->pool_index; 3589 int num_entries = 0; 3590 int total_bytes = 0; 3591 int num_packets = 0; 3592 3593 next = ibmvnic_next_scrq(adapter, scrq); 3594 for (i = 0; i < next->tx_comp.num_comps; i++) { 3595 index = be32_to_cpu(next->tx_comp.correlators[i]); 3596 if (index & IBMVNIC_TSO_POOL_MASK) { 3597 tx_pool = &adapter->tso_pool[pool]; 3598 index &= ~IBMVNIC_TSO_POOL_MASK; 3599 } else { 3600 tx_pool = &adapter->tx_pool[pool]; 3601 } 3602 3603 txbuff = &tx_pool->tx_buff[index]; 3604 num_packets++; 3605 num_entries += txbuff->num_entries; 3606 if (txbuff->skb) { 3607 total_bytes += txbuff->skb->len; 3608 if (next->tx_comp.rcs[i]) { 3609 dev_err(dev, "tx error %x\n", 3610 next->tx_comp.rcs[i]); 3611 dev_kfree_skb_irq(txbuff->skb); 3612 } else { 3613 dev_consume_skb_irq(txbuff->skb); 3614 } 3615 txbuff->skb = NULL; 3616 } else { 3617 netdev_warn(adapter->netdev, 3618 "TX completion received with NULL socket buffer\n"); 3619 } 3620 tx_pool->free_map[tx_pool->producer_index] = index; 3621 tx_pool->producer_index = 3622 (tx_pool->producer_index + 1) % 3623 tx_pool->num_buffers; 3624 } 3625 /* remove tx_comp scrq*/ 3626 next->tx_comp.first = 0; 3627 3628 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3629 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3630 3631 if (atomic_sub_return(num_entries, &scrq->used) <= 3632 (adapter->req_tx_entries_per_subcrq / 2) && 3633 __netif_subqueue_stopped(adapter->netdev, 3634 scrq->pool_index)) { 3635 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3636 netdev_dbg(adapter->netdev, "Started queue %d\n", 3637 scrq->pool_index); 3638 } 3639 } 3640 3641 enable_scrq_irq(adapter, scrq); 3642 3643 if (pending_scrq(adapter, scrq)) { 3644 disable_scrq_irq(adapter, scrq); 3645 goto restart_loop; 3646 } 3647 3648 return 0; 3649 } 3650 3651 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3652 { 3653 struct ibmvnic_sub_crq_queue *scrq = instance; 3654 struct ibmvnic_adapter *adapter = scrq->adapter; 3655 3656 disable_scrq_irq(adapter, scrq); 3657 ibmvnic_complete_tx(adapter, scrq); 3658 3659 return IRQ_HANDLED; 3660 } 3661 3662 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3663 { 3664 struct ibmvnic_sub_crq_queue *scrq = instance; 3665 struct ibmvnic_adapter *adapter = scrq->adapter; 3666 3667 /* When booting a kdump kernel we can hit pending interrupts 3668 * prior to completing driver initialization. 3669 */ 3670 if (unlikely(adapter->state != VNIC_OPEN)) 3671 return IRQ_NONE; 3672 3673 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3674 3675 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3676 disable_scrq_irq(adapter, scrq); 3677 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3678 } 3679 3680 return IRQ_HANDLED; 3681 } 3682 3683 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3684 { 3685 struct device *dev = &adapter->vdev->dev; 3686 struct ibmvnic_sub_crq_queue *scrq; 3687 int i = 0, j = 0; 3688 int rc = 0; 3689 3690 for (i = 0; i < adapter->req_tx_queues; i++) { 3691 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3692 i); 3693 scrq = adapter->tx_scrq[i]; 3694 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3695 3696 if (!scrq->irq) { 3697 rc = -EINVAL; 3698 dev_err(dev, "Error mapping irq\n"); 3699 goto req_tx_irq_failed; 3700 } 3701 3702 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3703 adapter->vdev->unit_address, i); 3704 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3705 0, scrq->name, scrq); 3706 3707 if (rc) { 3708 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3709 scrq->irq, rc); 3710 irq_dispose_mapping(scrq->irq); 3711 goto req_tx_irq_failed; 3712 } 3713 } 3714 3715 for (i = 0; i < adapter->req_rx_queues; i++) { 3716 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3717 i); 3718 scrq = adapter->rx_scrq[i]; 3719 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3720 if (!scrq->irq) { 3721 rc = -EINVAL; 3722 dev_err(dev, "Error mapping irq\n"); 3723 goto req_rx_irq_failed; 3724 } 3725 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3726 adapter->vdev->unit_address, i); 3727 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3728 0, scrq->name, scrq); 3729 if (rc) { 3730 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3731 scrq->irq, rc); 3732 irq_dispose_mapping(scrq->irq); 3733 goto req_rx_irq_failed; 3734 } 3735 } 3736 return rc; 3737 3738 req_rx_irq_failed: 3739 for (j = 0; j < i; j++) { 3740 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3741 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3742 } 3743 i = adapter->req_tx_queues; 3744 req_tx_irq_failed: 3745 for (j = 0; j < i; j++) { 3746 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3747 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3748 } 3749 release_sub_crqs(adapter, 1); 3750 return rc; 3751 } 3752 3753 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3754 { 3755 struct device *dev = &adapter->vdev->dev; 3756 struct ibmvnic_sub_crq_queue **allqueues; 3757 int registered_queues = 0; 3758 int total_queues; 3759 int more = 0; 3760 int i; 3761 3762 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3763 3764 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3765 if (!allqueues) 3766 return -1; 3767 3768 for (i = 0; i < total_queues; i++) { 3769 allqueues[i] = init_sub_crq_queue(adapter); 3770 if (!allqueues[i]) { 3771 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3772 break; 3773 } 3774 registered_queues++; 3775 } 3776 3777 /* Make sure we were able to register the minimum number of queues */ 3778 if (registered_queues < 3779 adapter->min_tx_queues + adapter->min_rx_queues) { 3780 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3781 goto tx_failed; 3782 } 3783 3784 /* Distribute the failed allocated queues*/ 3785 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3786 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3787 switch (i % 3) { 3788 case 0: 3789 if (adapter->req_rx_queues > adapter->min_rx_queues) 3790 adapter->req_rx_queues--; 3791 else 3792 more++; 3793 break; 3794 case 1: 3795 if (adapter->req_tx_queues > adapter->min_tx_queues) 3796 adapter->req_tx_queues--; 3797 else 3798 more++; 3799 break; 3800 } 3801 } 3802 3803 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3804 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3805 if (!adapter->tx_scrq) 3806 goto tx_failed; 3807 3808 for (i = 0; i < adapter->req_tx_queues; i++) { 3809 adapter->tx_scrq[i] = allqueues[i]; 3810 adapter->tx_scrq[i]->pool_index = i; 3811 adapter->num_active_tx_scrqs++; 3812 } 3813 3814 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3815 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3816 if (!adapter->rx_scrq) 3817 goto rx_failed; 3818 3819 for (i = 0; i < adapter->req_rx_queues; i++) { 3820 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3821 adapter->rx_scrq[i]->scrq_num = i; 3822 adapter->num_active_rx_scrqs++; 3823 } 3824 3825 kfree(allqueues); 3826 return 0; 3827 3828 rx_failed: 3829 kfree(adapter->tx_scrq); 3830 adapter->tx_scrq = NULL; 3831 tx_failed: 3832 for (i = 0; i < registered_queues; i++) 3833 release_sub_crq_queue(adapter, allqueues[i], 1); 3834 kfree(allqueues); 3835 return -1; 3836 } 3837 3838 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3839 { 3840 struct device *dev = &adapter->vdev->dev; 3841 union ibmvnic_crq crq; 3842 int max_entries; 3843 3844 if (!retry) { 3845 /* Sub-CRQ entries are 32 byte long */ 3846 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3847 3848 if (adapter->min_tx_entries_per_subcrq > entries_page || 3849 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3850 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3851 return; 3852 } 3853 3854 if (adapter->desired.mtu) 3855 adapter->req_mtu = adapter->desired.mtu; 3856 else 3857 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3858 3859 if (!adapter->desired.tx_entries) 3860 adapter->desired.tx_entries = 3861 adapter->max_tx_entries_per_subcrq; 3862 if (!adapter->desired.rx_entries) 3863 adapter->desired.rx_entries = 3864 adapter->max_rx_add_entries_per_subcrq; 3865 3866 max_entries = IBMVNIC_MAX_LTB_SIZE / 3867 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3868 3869 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3870 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3871 adapter->desired.tx_entries = max_entries; 3872 } 3873 3874 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3875 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3876 adapter->desired.rx_entries = max_entries; 3877 } 3878 3879 if (adapter->desired.tx_entries) 3880 adapter->req_tx_entries_per_subcrq = 3881 adapter->desired.tx_entries; 3882 else 3883 adapter->req_tx_entries_per_subcrq = 3884 adapter->max_tx_entries_per_subcrq; 3885 3886 if (adapter->desired.rx_entries) 3887 adapter->req_rx_add_entries_per_subcrq = 3888 adapter->desired.rx_entries; 3889 else 3890 adapter->req_rx_add_entries_per_subcrq = 3891 adapter->max_rx_add_entries_per_subcrq; 3892 3893 if (adapter->desired.tx_queues) 3894 adapter->req_tx_queues = 3895 adapter->desired.tx_queues; 3896 else 3897 adapter->req_tx_queues = 3898 adapter->opt_tx_comp_sub_queues; 3899 3900 if (adapter->desired.rx_queues) 3901 adapter->req_rx_queues = 3902 adapter->desired.rx_queues; 3903 else 3904 adapter->req_rx_queues = 3905 adapter->opt_rx_comp_queues; 3906 3907 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3908 } 3909 3910 memset(&crq, 0, sizeof(crq)); 3911 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3912 crq.request_capability.cmd = REQUEST_CAPABILITY; 3913 3914 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3915 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3916 atomic_inc(&adapter->running_cap_crqs); 3917 ibmvnic_send_crq(adapter, &crq); 3918 3919 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3920 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3921 atomic_inc(&adapter->running_cap_crqs); 3922 ibmvnic_send_crq(adapter, &crq); 3923 3924 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3925 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3926 atomic_inc(&adapter->running_cap_crqs); 3927 ibmvnic_send_crq(adapter, &crq); 3928 3929 crq.request_capability.capability = 3930 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3931 crq.request_capability.number = 3932 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3933 atomic_inc(&adapter->running_cap_crqs); 3934 ibmvnic_send_crq(adapter, &crq); 3935 3936 crq.request_capability.capability = 3937 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3938 crq.request_capability.number = 3939 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3940 atomic_inc(&adapter->running_cap_crqs); 3941 ibmvnic_send_crq(adapter, &crq); 3942 3943 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3944 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3945 atomic_inc(&adapter->running_cap_crqs); 3946 ibmvnic_send_crq(adapter, &crq); 3947 3948 if (adapter->netdev->flags & IFF_PROMISC) { 3949 if (adapter->promisc_supported) { 3950 crq.request_capability.capability = 3951 cpu_to_be16(PROMISC_REQUESTED); 3952 crq.request_capability.number = cpu_to_be64(1); 3953 atomic_inc(&adapter->running_cap_crqs); 3954 ibmvnic_send_crq(adapter, &crq); 3955 } 3956 } else { 3957 crq.request_capability.capability = 3958 cpu_to_be16(PROMISC_REQUESTED); 3959 crq.request_capability.number = cpu_to_be64(0); 3960 atomic_inc(&adapter->running_cap_crqs); 3961 ibmvnic_send_crq(adapter, &crq); 3962 } 3963 } 3964 3965 static int pending_scrq(struct ibmvnic_adapter *adapter, 3966 struct ibmvnic_sub_crq_queue *scrq) 3967 { 3968 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3969 int rc; 3970 3971 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3972 3973 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3974 * contents of the SCRQ descriptor 3975 */ 3976 dma_rmb(); 3977 3978 return rc; 3979 } 3980 3981 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3982 struct ibmvnic_sub_crq_queue *scrq) 3983 { 3984 union sub_crq *entry; 3985 unsigned long flags; 3986 3987 spin_lock_irqsave(&scrq->lock, flags); 3988 entry = &scrq->msgs[scrq->cur]; 3989 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3990 if (++scrq->cur == scrq->size) 3991 scrq->cur = 0; 3992 } else { 3993 entry = NULL; 3994 } 3995 spin_unlock_irqrestore(&scrq->lock, flags); 3996 3997 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3998 * contents of the SCRQ descriptor 3999 */ 4000 dma_rmb(); 4001 4002 return entry; 4003 } 4004 4005 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4006 { 4007 struct ibmvnic_crq_queue *queue = &adapter->crq; 4008 union ibmvnic_crq *crq; 4009 4010 crq = &queue->msgs[queue->cur]; 4011 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4012 if (++queue->cur == queue->size) 4013 queue->cur = 0; 4014 } else { 4015 crq = NULL; 4016 } 4017 4018 return crq; 4019 } 4020 4021 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4022 { 4023 switch (rc) { 4024 case H_PARAMETER: 4025 dev_warn_ratelimited(dev, 4026 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4027 func, rc); 4028 break; 4029 case H_CLOSED: 4030 dev_warn_ratelimited(dev, 4031 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4032 func, rc); 4033 break; 4034 default: 4035 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4036 break; 4037 } 4038 } 4039 4040 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4041 u64 remote_handle, u64 ioba, u64 num_entries) 4042 { 4043 unsigned int ua = adapter->vdev->unit_address; 4044 struct device *dev = &adapter->vdev->dev; 4045 int rc; 4046 4047 /* Make sure the hypervisor sees the complete request */ 4048 dma_wmb(); 4049 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4050 cpu_to_be64(remote_handle), 4051 ioba, num_entries); 4052 4053 if (rc) 4054 print_subcrq_error(dev, rc, __func__); 4055 4056 return rc; 4057 } 4058 4059 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4060 union ibmvnic_crq *crq) 4061 { 4062 unsigned int ua = adapter->vdev->unit_address; 4063 struct device *dev = &adapter->vdev->dev; 4064 u64 *u64_crq = (u64 *)crq; 4065 int rc; 4066 4067 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4068 (unsigned long)cpu_to_be64(u64_crq[0]), 4069 (unsigned long)cpu_to_be64(u64_crq[1])); 4070 4071 if (!adapter->crq.active && 4072 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4073 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4074 return -EINVAL; 4075 } 4076 4077 /* Make sure the hypervisor sees the complete request */ 4078 dma_wmb(); 4079 4080 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4081 cpu_to_be64(u64_crq[0]), 4082 cpu_to_be64(u64_crq[1])); 4083 4084 if (rc) { 4085 if (rc == H_CLOSED) { 4086 dev_warn(dev, "CRQ Queue closed\n"); 4087 /* do not reset, report the fail, wait for passive init from server */ 4088 } 4089 4090 dev_warn(dev, "Send error (rc=%d)\n", rc); 4091 } 4092 4093 return rc; 4094 } 4095 4096 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4097 { 4098 struct device *dev = &adapter->vdev->dev; 4099 union ibmvnic_crq crq; 4100 int retries = 100; 4101 int rc; 4102 4103 memset(&crq, 0, sizeof(crq)); 4104 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4105 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4106 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4107 4108 do { 4109 rc = ibmvnic_send_crq(adapter, &crq); 4110 if (rc != H_CLOSED) 4111 break; 4112 retries--; 4113 msleep(50); 4114 4115 } while (retries > 0); 4116 4117 if (rc) { 4118 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4119 return rc; 4120 } 4121 4122 return 0; 4123 } 4124 4125 struct vnic_login_client_data { 4126 u8 type; 4127 __be16 len; 4128 char name[]; 4129 } __packed; 4130 4131 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4132 { 4133 int len; 4134 4135 /* Calculate the amount of buffer space needed for the 4136 * vnic client data in the login buffer. There are four entries, 4137 * OS name, LPAR name, device name, and a null last entry. 4138 */ 4139 len = 4 * sizeof(struct vnic_login_client_data); 4140 len += 6; /* "Linux" plus NULL */ 4141 len += strlen(utsname()->nodename) + 1; 4142 len += strlen(adapter->netdev->name) + 1; 4143 4144 return len; 4145 } 4146 4147 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4148 struct vnic_login_client_data *vlcd) 4149 { 4150 const char *os_name = "Linux"; 4151 int len; 4152 4153 /* Type 1 - LPAR OS */ 4154 vlcd->type = 1; 4155 len = strlen(os_name) + 1; 4156 vlcd->len = cpu_to_be16(len); 4157 strscpy(vlcd->name, os_name, len); 4158 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4159 4160 /* Type 2 - LPAR name */ 4161 vlcd->type = 2; 4162 len = strlen(utsname()->nodename) + 1; 4163 vlcd->len = cpu_to_be16(len); 4164 strscpy(vlcd->name, utsname()->nodename, len); 4165 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4166 4167 /* Type 3 - device name */ 4168 vlcd->type = 3; 4169 len = strlen(adapter->netdev->name) + 1; 4170 vlcd->len = cpu_to_be16(len); 4171 strscpy(vlcd->name, adapter->netdev->name, len); 4172 } 4173 4174 static int send_login(struct ibmvnic_adapter *adapter) 4175 { 4176 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4177 struct ibmvnic_login_buffer *login_buffer; 4178 struct device *dev = &adapter->vdev->dev; 4179 struct vnic_login_client_data *vlcd; 4180 dma_addr_t rsp_buffer_token; 4181 dma_addr_t buffer_token; 4182 size_t rsp_buffer_size; 4183 union ibmvnic_crq crq; 4184 int client_data_len; 4185 size_t buffer_size; 4186 __be64 *tx_list_p; 4187 __be64 *rx_list_p; 4188 int rc; 4189 int i; 4190 4191 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4192 netdev_err(adapter->netdev, 4193 "RX or TX queues are not allocated, device login failed\n"); 4194 return -1; 4195 } 4196 4197 release_login_buffer(adapter); 4198 release_login_rsp_buffer(adapter); 4199 4200 client_data_len = vnic_client_data_len(adapter); 4201 4202 buffer_size = 4203 sizeof(struct ibmvnic_login_buffer) + 4204 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4205 client_data_len; 4206 4207 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4208 if (!login_buffer) 4209 goto buf_alloc_failed; 4210 4211 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4212 DMA_TO_DEVICE); 4213 if (dma_mapping_error(dev, buffer_token)) { 4214 dev_err(dev, "Couldn't map login buffer\n"); 4215 goto buf_map_failed; 4216 } 4217 4218 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4219 sizeof(u64) * adapter->req_tx_queues + 4220 sizeof(u64) * adapter->req_rx_queues + 4221 sizeof(u64) * adapter->req_rx_queues + 4222 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4223 4224 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4225 if (!login_rsp_buffer) 4226 goto buf_rsp_alloc_failed; 4227 4228 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4229 rsp_buffer_size, DMA_FROM_DEVICE); 4230 if (dma_mapping_error(dev, rsp_buffer_token)) { 4231 dev_err(dev, "Couldn't map login rsp buffer\n"); 4232 goto buf_rsp_map_failed; 4233 } 4234 4235 adapter->login_buf = login_buffer; 4236 adapter->login_buf_token = buffer_token; 4237 adapter->login_buf_sz = buffer_size; 4238 adapter->login_rsp_buf = login_rsp_buffer; 4239 adapter->login_rsp_buf_token = rsp_buffer_token; 4240 adapter->login_rsp_buf_sz = rsp_buffer_size; 4241 4242 login_buffer->len = cpu_to_be32(buffer_size); 4243 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4244 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4245 login_buffer->off_txcomp_subcrqs = 4246 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4247 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4248 login_buffer->off_rxcomp_subcrqs = 4249 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4250 sizeof(u64) * adapter->req_tx_queues); 4251 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4252 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4253 4254 tx_list_p = (__be64 *)((char *)login_buffer + 4255 sizeof(struct ibmvnic_login_buffer)); 4256 rx_list_p = (__be64 *)((char *)login_buffer + 4257 sizeof(struct ibmvnic_login_buffer) + 4258 sizeof(u64) * adapter->req_tx_queues); 4259 4260 for (i = 0; i < adapter->req_tx_queues; i++) { 4261 if (adapter->tx_scrq[i]) { 4262 tx_list_p[i] = 4263 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4264 } 4265 } 4266 4267 for (i = 0; i < adapter->req_rx_queues; i++) { 4268 if (adapter->rx_scrq[i]) { 4269 rx_list_p[i] = 4270 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4271 } 4272 } 4273 4274 /* Insert vNIC login client data */ 4275 vlcd = (struct vnic_login_client_data *) 4276 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4277 login_buffer->client_data_offset = 4278 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4279 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4280 4281 vnic_add_client_data(adapter, vlcd); 4282 4283 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4284 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4285 netdev_dbg(adapter->netdev, "%016lx\n", 4286 ((unsigned long *)(adapter->login_buf))[i]); 4287 } 4288 4289 memset(&crq, 0, sizeof(crq)); 4290 crq.login.first = IBMVNIC_CRQ_CMD; 4291 crq.login.cmd = LOGIN; 4292 crq.login.ioba = cpu_to_be32(buffer_token); 4293 crq.login.len = cpu_to_be32(buffer_size); 4294 4295 adapter->login_pending = true; 4296 rc = ibmvnic_send_crq(adapter, &crq); 4297 if (rc) { 4298 adapter->login_pending = false; 4299 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4300 goto buf_rsp_map_failed; 4301 } 4302 4303 return 0; 4304 4305 buf_rsp_map_failed: 4306 kfree(login_rsp_buffer); 4307 adapter->login_rsp_buf = NULL; 4308 buf_rsp_alloc_failed: 4309 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4310 buf_map_failed: 4311 kfree(login_buffer); 4312 adapter->login_buf = NULL; 4313 buf_alloc_failed: 4314 return -1; 4315 } 4316 4317 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4318 u32 len, u8 map_id) 4319 { 4320 union ibmvnic_crq crq; 4321 4322 memset(&crq, 0, sizeof(crq)); 4323 crq.request_map.first = IBMVNIC_CRQ_CMD; 4324 crq.request_map.cmd = REQUEST_MAP; 4325 crq.request_map.map_id = map_id; 4326 crq.request_map.ioba = cpu_to_be32(addr); 4327 crq.request_map.len = cpu_to_be32(len); 4328 return ibmvnic_send_crq(adapter, &crq); 4329 } 4330 4331 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4332 { 4333 union ibmvnic_crq crq; 4334 4335 memset(&crq, 0, sizeof(crq)); 4336 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4337 crq.request_unmap.cmd = REQUEST_UNMAP; 4338 crq.request_unmap.map_id = map_id; 4339 return ibmvnic_send_crq(adapter, &crq); 4340 } 4341 4342 static void send_query_map(struct ibmvnic_adapter *adapter) 4343 { 4344 union ibmvnic_crq crq; 4345 4346 memset(&crq, 0, sizeof(crq)); 4347 crq.query_map.first = IBMVNIC_CRQ_CMD; 4348 crq.query_map.cmd = QUERY_MAP; 4349 ibmvnic_send_crq(adapter, &crq); 4350 } 4351 4352 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4353 static void send_query_cap(struct ibmvnic_adapter *adapter) 4354 { 4355 union ibmvnic_crq crq; 4356 4357 atomic_set(&adapter->running_cap_crqs, 0); 4358 memset(&crq, 0, sizeof(crq)); 4359 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4360 crq.query_capability.cmd = QUERY_CAPABILITY; 4361 4362 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4363 atomic_inc(&adapter->running_cap_crqs); 4364 ibmvnic_send_crq(adapter, &crq); 4365 4366 crq.query_capability.capability = cpu_to_be16(MIN_RX_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_ADD_QUEUES); 4371 atomic_inc(&adapter->running_cap_crqs); 4372 ibmvnic_send_crq(adapter, &crq); 4373 4374 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4375 atomic_inc(&adapter->running_cap_crqs); 4376 ibmvnic_send_crq(adapter, &crq); 4377 4378 crq.query_capability.capability = cpu_to_be16(MAX_RX_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_ADD_QUEUES); 4383 atomic_inc(&adapter->running_cap_crqs); 4384 ibmvnic_send_crq(adapter, &crq); 4385 4386 crq.query_capability.capability = 4387 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4388 atomic_inc(&adapter->running_cap_crqs); 4389 ibmvnic_send_crq(adapter, &crq); 4390 4391 crq.query_capability.capability = 4392 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4393 atomic_inc(&adapter->running_cap_crqs); 4394 ibmvnic_send_crq(adapter, &crq); 4395 4396 crq.query_capability.capability = 4397 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4398 atomic_inc(&adapter->running_cap_crqs); 4399 ibmvnic_send_crq(adapter, &crq); 4400 4401 crq.query_capability.capability = 4402 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4403 atomic_inc(&adapter->running_cap_crqs); 4404 ibmvnic_send_crq(adapter, &crq); 4405 4406 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4407 atomic_inc(&adapter->running_cap_crqs); 4408 ibmvnic_send_crq(adapter, &crq); 4409 4410 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4411 atomic_inc(&adapter->running_cap_crqs); 4412 ibmvnic_send_crq(adapter, &crq); 4413 4414 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4415 atomic_inc(&adapter->running_cap_crqs); 4416 ibmvnic_send_crq(adapter, &crq); 4417 4418 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4419 atomic_inc(&adapter->running_cap_crqs); 4420 ibmvnic_send_crq(adapter, &crq); 4421 4422 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4423 atomic_inc(&adapter->running_cap_crqs); 4424 ibmvnic_send_crq(adapter, &crq); 4425 4426 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4427 atomic_inc(&adapter->running_cap_crqs); 4428 ibmvnic_send_crq(adapter, &crq); 4429 4430 crq.query_capability.capability = cpu_to_be16(RX_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(MAX_TX_SG_ENTRIES); 4435 atomic_inc(&adapter->running_cap_crqs); 4436 ibmvnic_send_crq(adapter, &crq); 4437 4438 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4439 atomic_inc(&adapter->running_cap_crqs); 4440 ibmvnic_send_crq(adapter, &crq); 4441 4442 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4443 atomic_inc(&adapter->running_cap_crqs); 4444 ibmvnic_send_crq(adapter, &crq); 4445 4446 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4447 atomic_inc(&adapter->running_cap_crqs); 4448 ibmvnic_send_crq(adapter, &crq); 4449 4450 crq.query_capability.capability = 4451 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4452 atomic_inc(&adapter->running_cap_crqs); 4453 ibmvnic_send_crq(adapter, &crq); 4454 4455 crq.query_capability.capability = 4456 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4457 atomic_inc(&adapter->running_cap_crqs); 4458 ibmvnic_send_crq(adapter, &crq); 4459 4460 crq.query_capability.capability = 4461 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4462 atomic_inc(&adapter->running_cap_crqs); 4463 ibmvnic_send_crq(adapter, &crq); 4464 4465 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4466 atomic_inc(&adapter->running_cap_crqs); 4467 ibmvnic_send_crq(adapter, &crq); 4468 } 4469 4470 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4471 { 4472 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4473 struct device *dev = &adapter->vdev->dev; 4474 union ibmvnic_crq crq; 4475 4476 adapter->ip_offload_tok = 4477 dma_map_single(dev, 4478 &adapter->ip_offload_buf, 4479 buf_sz, 4480 DMA_FROM_DEVICE); 4481 4482 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4483 if (!firmware_has_feature(FW_FEATURE_CMO)) 4484 dev_err(dev, "Couldn't map offload buffer\n"); 4485 return; 4486 } 4487 4488 memset(&crq, 0, sizeof(crq)); 4489 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4490 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4491 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4492 crq.query_ip_offload.ioba = 4493 cpu_to_be32(adapter->ip_offload_tok); 4494 4495 ibmvnic_send_crq(adapter, &crq); 4496 } 4497 4498 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4499 { 4500 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4501 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4502 struct device *dev = &adapter->vdev->dev; 4503 netdev_features_t old_hw_features = 0; 4504 union ibmvnic_crq crq; 4505 4506 adapter->ip_offload_ctrl_tok = 4507 dma_map_single(dev, 4508 ctrl_buf, 4509 sizeof(adapter->ip_offload_ctrl), 4510 DMA_TO_DEVICE); 4511 4512 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4513 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4514 return; 4515 } 4516 4517 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4518 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4519 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4520 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4521 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4522 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4523 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4524 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4525 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4526 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4527 4528 /* large_rx disabled for now, additional features needed */ 4529 ctrl_buf->large_rx_ipv4 = 0; 4530 ctrl_buf->large_rx_ipv6 = 0; 4531 4532 if (adapter->state != VNIC_PROBING) { 4533 old_hw_features = adapter->netdev->hw_features; 4534 adapter->netdev->hw_features = 0; 4535 } 4536 4537 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4538 4539 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4540 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4541 4542 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4543 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4544 4545 if ((adapter->netdev->features & 4546 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4547 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4548 4549 if (buf->large_tx_ipv4) 4550 adapter->netdev->hw_features |= NETIF_F_TSO; 4551 if (buf->large_tx_ipv6) 4552 adapter->netdev->hw_features |= NETIF_F_TSO6; 4553 4554 if (adapter->state == VNIC_PROBING) { 4555 adapter->netdev->features |= adapter->netdev->hw_features; 4556 } else if (old_hw_features != adapter->netdev->hw_features) { 4557 netdev_features_t tmp = 0; 4558 4559 /* disable features no longer supported */ 4560 adapter->netdev->features &= adapter->netdev->hw_features; 4561 /* turn on features now supported if previously enabled */ 4562 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4563 adapter->netdev->hw_features; 4564 adapter->netdev->features |= 4565 tmp & adapter->netdev->wanted_features; 4566 } 4567 4568 memset(&crq, 0, sizeof(crq)); 4569 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4570 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4571 crq.control_ip_offload.len = 4572 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4573 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4574 ibmvnic_send_crq(adapter, &crq); 4575 } 4576 4577 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4578 struct ibmvnic_adapter *adapter) 4579 { 4580 struct device *dev = &adapter->vdev->dev; 4581 4582 if (crq->get_vpd_size_rsp.rc.code) { 4583 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4584 crq->get_vpd_size_rsp.rc.code); 4585 complete(&adapter->fw_done); 4586 return; 4587 } 4588 4589 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4590 complete(&adapter->fw_done); 4591 } 4592 4593 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4594 struct ibmvnic_adapter *adapter) 4595 { 4596 struct device *dev = &adapter->vdev->dev; 4597 unsigned char *substr = NULL; 4598 u8 fw_level_len = 0; 4599 4600 memset(adapter->fw_version, 0, 32); 4601 4602 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4603 DMA_FROM_DEVICE); 4604 4605 if (crq->get_vpd_rsp.rc.code) { 4606 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4607 crq->get_vpd_rsp.rc.code); 4608 goto complete; 4609 } 4610 4611 /* get the position of the firmware version info 4612 * located after the ASCII 'RM' substring in the buffer 4613 */ 4614 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4615 if (!substr) { 4616 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4617 goto complete; 4618 } 4619 4620 /* get length of firmware level ASCII substring */ 4621 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4622 fw_level_len = *(substr + 2); 4623 } else { 4624 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4625 goto complete; 4626 } 4627 4628 /* copy firmware version string from vpd into adapter */ 4629 if ((substr + 3 + fw_level_len) < 4630 (adapter->vpd->buff + adapter->vpd->len)) { 4631 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4632 } else { 4633 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4634 } 4635 4636 complete: 4637 if (adapter->fw_version[0] == '\0') 4638 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4639 complete(&adapter->fw_done); 4640 } 4641 4642 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4643 { 4644 struct device *dev = &adapter->vdev->dev; 4645 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4646 int i; 4647 4648 dma_unmap_single(dev, adapter->ip_offload_tok, 4649 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4650 4651 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4652 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4653 netdev_dbg(adapter->netdev, "%016lx\n", 4654 ((unsigned long *)(buf))[i]); 4655 4656 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4657 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4658 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4659 buf->tcp_ipv4_chksum); 4660 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4661 buf->tcp_ipv6_chksum); 4662 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4663 buf->udp_ipv4_chksum); 4664 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4665 buf->udp_ipv6_chksum); 4666 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4667 buf->large_tx_ipv4); 4668 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4669 buf->large_tx_ipv6); 4670 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4671 buf->large_rx_ipv4); 4672 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4673 buf->large_rx_ipv6); 4674 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4675 buf->max_ipv4_header_size); 4676 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4677 buf->max_ipv6_header_size); 4678 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4679 buf->max_tcp_header_size); 4680 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4681 buf->max_udp_header_size); 4682 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4683 buf->max_large_tx_size); 4684 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4685 buf->max_large_rx_size); 4686 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4687 buf->ipv6_extension_header); 4688 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4689 buf->tcp_pseudosum_req); 4690 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4691 buf->num_ipv6_ext_headers); 4692 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4693 buf->off_ipv6_ext_headers); 4694 4695 send_control_ip_offload(adapter); 4696 } 4697 4698 static const char *ibmvnic_fw_err_cause(u16 cause) 4699 { 4700 switch (cause) { 4701 case ADAPTER_PROBLEM: 4702 return "adapter problem"; 4703 case BUS_PROBLEM: 4704 return "bus problem"; 4705 case FW_PROBLEM: 4706 return "firmware problem"; 4707 case DD_PROBLEM: 4708 return "device driver problem"; 4709 case EEH_RECOVERY: 4710 return "EEH recovery"; 4711 case FW_UPDATED: 4712 return "firmware updated"; 4713 case LOW_MEMORY: 4714 return "low Memory"; 4715 default: 4716 return "unknown"; 4717 } 4718 } 4719 4720 static void handle_error_indication(union ibmvnic_crq *crq, 4721 struct ibmvnic_adapter *adapter) 4722 { 4723 struct device *dev = &adapter->vdev->dev; 4724 u16 cause; 4725 4726 cause = be16_to_cpu(crq->error_indication.error_cause); 4727 4728 dev_warn_ratelimited(dev, 4729 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4730 crq->error_indication.flags 4731 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4732 ibmvnic_fw_err_cause(cause)); 4733 4734 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4735 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4736 else 4737 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4738 } 4739 4740 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4741 struct ibmvnic_adapter *adapter) 4742 { 4743 struct net_device *netdev = adapter->netdev; 4744 struct device *dev = &adapter->vdev->dev; 4745 long rc; 4746 4747 rc = crq->change_mac_addr_rsp.rc.code; 4748 if (rc) { 4749 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4750 goto out; 4751 } 4752 /* crq->change_mac_addr.mac_addr is the requested one 4753 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4754 */ 4755 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 4756 ether_addr_copy(adapter->mac_addr, 4757 &crq->change_mac_addr_rsp.mac_addr[0]); 4758 out: 4759 complete(&adapter->fw_done); 4760 return rc; 4761 } 4762 4763 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4764 struct ibmvnic_adapter *adapter) 4765 { 4766 struct device *dev = &adapter->vdev->dev; 4767 u64 *req_value; 4768 char *name; 4769 4770 atomic_dec(&adapter->running_cap_crqs); 4771 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4772 case REQ_TX_QUEUES: 4773 req_value = &adapter->req_tx_queues; 4774 name = "tx"; 4775 break; 4776 case REQ_RX_QUEUES: 4777 req_value = &adapter->req_rx_queues; 4778 name = "rx"; 4779 break; 4780 case REQ_RX_ADD_QUEUES: 4781 req_value = &adapter->req_rx_add_queues; 4782 name = "rx_add"; 4783 break; 4784 case REQ_TX_ENTRIES_PER_SUBCRQ: 4785 req_value = &adapter->req_tx_entries_per_subcrq; 4786 name = "tx_entries_per_subcrq"; 4787 break; 4788 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4789 req_value = &adapter->req_rx_add_entries_per_subcrq; 4790 name = "rx_add_entries_per_subcrq"; 4791 break; 4792 case REQ_MTU: 4793 req_value = &adapter->req_mtu; 4794 name = "mtu"; 4795 break; 4796 case PROMISC_REQUESTED: 4797 req_value = &adapter->promisc; 4798 name = "promisc"; 4799 break; 4800 default: 4801 dev_err(dev, "Got invalid cap request rsp %d\n", 4802 crq->request_capability.capability); 4803 return; 4804 } 4805 4806 switch (crq->request_capability_rsp.rc.code) { 4807 case SUCCESS: 4808 break; 4809 case PARTIALSUCCESS: 4810 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4811 *req_value, 4812 (long)be64_to_cpu(crq->request_capability_rsp.number), 4813 name); 4814 4815 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4816 REQ_MTU) { 4817 pr_err("mtu of %llu is not supported. Reverting.\n", 4818 *req_value); 4819 *req_value = adapter->fallback.mtu; 4820 } else { 4821 *req_value = 4822 be64_to_cpu(crq->request_capability_rsp.number); 4823 } 4824 4825 send_request_cap(adapter, 1); 4826 return; 4827 default: 4828 dev_err(dev, "Error %d in request cap rsp\n", 4829 crq->request_capability_rsp.rc.code); 4830 return; 4831 } 4832 4833 /* Done receiving requested capabilities, query IP offload support */ 4834 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4835 adapter->wait_capability = false; 4836 send_query_ip_offload(adapter); 4837 } 4838 } 4839 4840 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4841 struct ibmvnic_adapter *adapter) 4842 { 4843 struct device *dev = &adapter->vdev->dev; 4844 struct net_device *netdev = adapter->netdev; 4845 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4846 struct ibmvnic_login_buffer *login = adapter->login_buf; 4847 u64 *tx_handle_array; 4848 u64 *rx_handle_array; 4849 int num_tx_pools; 4850 int num_rx_pools; 4851 u64 *size_array; 4852 int i; 4853 4854 /* CHECK: Test/set of login_pending does not need to be atomic 4855 * because only ibmvnic_tasklet tests/clears this. 4856 */ 4857 if (!adapter->login_pending) { 4858 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4859 return 0; 4860 } 4861 adapter->login_pending = false; 4862 4863 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4864 DMA_TO_DEVICE); 4865 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4866 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4867 4868 /* If the number of queues requested can't be allocated by the 4869 * server, the login response will return with code 1. We will need 4870 * to resend the login buffer with fewer queues requested. 4871 */ 4872 if (login_rsp_crq->generic.rc.code) { 4873 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4874 complete(&adapter->init_done); 4875 return 0; 4876 } 4877 4878 if (adapter->failover_pending) { 4879 adapter->init_done_rc = -EAGAIN; 4880 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 4881 complete(&adapter->init_done); 4882 /* login response buffer will be released on reset */ 4883 return 0; 4884 } 4885 4886 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4887 4888 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4889 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4890 netdev_dbg(adapter->netdev, "%016lx\n", 4891 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4892 } 4893 4894 /* Sanity checks */ 4895 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4896 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4897 adapter->req_rx_add_queues != 4898 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4899 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4900 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4901 return -EIO; 4902 } 4903 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4904 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4905 /* variable buffer sizes are not supported, so just read the 4906 * first entry. 4907 */ 4908 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4909 4910 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4911 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4912 4913 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4914 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4915 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4916 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4917 4918 for (i = 0; i < num_tx_pools; i++) 4919 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4920 4921 for (i = 0; i < num_rx_pools; i++) 4922 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4923 4924 adapter->num_active_tx_scrqs = num_tx_pools; 4925 adapter->num_active_rx_scrqs = num_rx_pools; 4926 release_login_rsp_buffer(adapter); 4927 release_login_buffer(adapter); 4928 complete(&adapter->init_done); 4929 4930 return 0; 4931 } 4932 4933 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4934 struct ibmvnic_adapter *adapter) 4935 { 4936 struct device *dev = &adapter->vdev->dev; 4937 long rc; 4938 4939 rc = crq->request_unmap_rsp.rc.code; 4940 if (rc) 4941 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4942 } 4943 4944 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4945 struct ibmvnic_adapter *adapter) 4946 { 4947 struct net_device *netdev = adapter->netdev; 4948 struct device *dev = &adapter->vdev->dev; 4949 long rc; 4950 4951 rc = crq->query_map_rsp.rc.code; 4952 if (rc) { 4953 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4954 return; 4955 } 4956 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 4957 crq->query_map_rsp.page_size, 4958 __be32_to_cpu(crq->query_map_rsp.tot_pages), 4959 __be32_to_cpu(crq->query_map_rsp.free_pages)); 4960 } 4961 4962 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4963 struct ibmvnic_adapter *adapter) 4964 { 4965 struct net_device *netdev = adapter->netdev; 4966 struct device *dev = &adapter->vdev->dev; 4967 long rc; 4968 4969 atomic_dec(&adapter->running_cap_crqs); 4970 netdev_dbg(netdev, "Outstanding queries: %d\n", 4971 atomic_read(&adapter->running_cap_crqs)); 4972 rc = crq->query_capability.rc.code; 4973 if (rc) { 4974 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4975 goto out; 4976 } 4977 4978 switch (be16_to_cpu(crq->query_capability.capability)) { 4979 case MIN_TX_QUEUES: 4980 adapter->min_tx_queues = 4981 be64_to_cpu(crq->query_capability.number); 4982 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4983 adapter->min_tx_queues); 4984 break; 4985 case MIN_RX_QUEUES: 4986 adapter->min_rx_queues = 4987 be64_to_cpu(crq->query_capability.number); 4988 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4989 adapter->min_rx_queues); 4990 break; 4991 case MIN_RX_ADD_QUEUES: 4992 adapter->min_rx_add_queues = 4993 be64_to_cpu(crq->query_capability.number); 4994 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4995 adapter->min_rx_add_queues); 4996 break; 4997 case MAX_TX_QUEUES: 4998 adapter->max_tx_queues = 4999 be64_to_cpu(crq->query_capability.number); 5000 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5001 adapter->max_tx_queues); 5002 break; 5003 case MAX_RX_QUEUES: 5004 adapter->max_rx_queues = 5005 be64_to_cpu(crq->query_capability.number); 5006 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5007 adapter->max_rx_queues); 5008 break; 5009 case MAX_RX_ADD_QUEUES: 5010 adapter->max_rx_add_queues = 5011 be64_to_cpu(crq->query_capability.number); 5012 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5013 adapter->max_rx_add_queues); 5014 break; 5015 case MIN_TX_ENTRIES_PER_SUBCRQ: 5016 adapter->min_tx_entries_per_subcrq = 5017 be64_to_cpu(crq->query_capability.number); 5018 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5019 adapter->min_tx_entries_per_subcrq); 5020 break; 5021 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5022 adapter->min_rx_add_entries_per_subcrq = 5023 be64_to_cpu(crq->query_capability.number); 5024 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5025 adapter->min_rx_add_entries_per_subcrq); 5026 break; 5027 case MAX_TX_ENTRIES_PER_SUBCRQ: 5028 adapter->max_tx_entries_per_subcrq = 5029 be64_to_cpu(crq->query_capability.number); 5030 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5031 adapter->max_tx_entries_per_subcrq); 5032 break; 5033 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5034 adapter->max_rx_add_entries_per_subcrq = 5035 be64_to_cpu(crq->query_capability.number); 5036 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5037 adapter->max_rx_add_entries_per_subcrq); 5038 break; 5039 case TCP_IP_OFFLOAD: 5040 adapter->tcp_ip_offload = 5041 be64_to_cpu(crq->query_capability.number); 5042 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5043 adapter->tcp_ip_offload); 5044 break; 5045 case PROMISC_SUPPORTED: 5046 adapter->promisc_supported = 5047 be64_to_cpu(crq->query_capability.number); 5048 netdev_dbg(netdev, "promisc_supported = %lld\n", 5049 adapter->promisc_supported); 5050 break; 5051 case MIN_MTU: 5052 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5053 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5054 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5055 break; 5056 case MAX_MTU: 5057 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5058 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5059 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5060 break; 5061 case MAX_MULTICAST_FILTERS: 5062 adapter->max_multicast_filters = 5063 be64_to_cpu(crq->query_capability.number); 5064 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5065 adapter->max_multicast_filters); 5066 break; 5067 case VLAN_HEADER_INSERTION: 5068 adapter->vlan_header_insertion = 5069 be64_to_cpu(crq->query_capability.number); 5070 if (adapter->vlan_header_insertion) 5071 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5072 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5073 adapter->vlan_header_insertion); 5074 break; 5075 case RX_VLAN_HEADER_INSERTION: 5076 adapter->rx_vlan_header_insertion = 5077 be64_to_cpu(crq->query_capability.number); 5078 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5079 adapter->rx_vlan_header_insertion); 5080 break; 5081 case MAX_TX_SG_ENTRIES: 5082 adapter->max_tx_sg_entries = 5083 be64_to_cpu(crq->query_capability.number); 5084 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5085 adapter->max_tx_sg_entries); 5086 break; 5087 case RX_SG_SUPPORTED: 5088 adapter->rx_sg_supported = 5089 be64_to_cpu(crq->query_capability.number); 5090 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5091 adapter->rx_sg_supported); 5092 break; 5093 case OPT_TX_COMP_SUB_QUEUES: 5094 adapter->opt_tx_comp_sub_queues = 5095 be64_to_cpu(crq->query_capability.number); 5096 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5097 adapter->opt_tx_comp_sub_queues); 5098 break; 5099 case OPT_RX_COMP_QUEUES: 5100 adapter->opt_rx_comp_queues = 5101 be64_to_cpu(crq->query_capability.number); 5102 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5103 adapter->opt_rx_comp_queues); 5104 break; 5105 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5106 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5107 be64_to_cpu(crq->query_capability.number); 5108 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5109 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5110 break; 5111 case OPT_TX_ENTRIES_PER_SUBCRQ: 5112 adapter->opt_tx_entries_per_subcrq = 5113 be64_to_cpu(crq->query_capability.number); 5114 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5115 adapter->opt_tx_entries_per_subcrq); 5116 break; 5117 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5118 adapter->opt_rxba_entries_per_subcrq = 5119 be64_to_cpu(crq->query_capability.number); 5120 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5121 adapter->opt_rxba_entries_per_subcrq); 5122 break; 5123 case TX_RX_DESC_REQ: 5124 adapter->tx_rx_desc_req = crq->query_capability.number; 5125 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5126 adapter->tx_rx_desc_req); 5127 break; 5128 5129 default: 5130 netdev_err(netdev, "Got invalid cap rsp %d\n", 5131 crq->query_capability.capability); 5132 } 5133 5134 out: 5135 if (atomic_read(&adapter->running_cap_crqs) == 0) { 5136 adapter->wait_capability = false; 5137 send_request_cap(adapter, 0); 5138 } 5139 } 5140 5141 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5142 { 5143 union ibmvnic_crq crq; 5144 int rc; 5145 5146 memset(&crq, 0, sizeof(crq)); 5147 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5148 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5149 5150 mutex_lock(&adapter->fw_lock); 5151 adapter->fw_done_rc = 0; 5152 reinit_completion(&adapter->fw_done); 5153 5154 rc = ibmvnic_send_crq(adapter, &crq); 5155 if (rc) { 5156 mutex_unlock(&adapter->fw_lock); 5157 return rc; 5158 } 5159 5160 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5161 if (rc) { 5162 mutex_unlock(&adapter->fw_lock); 5163 return rc; 5164 } 5165 5166 mutex_unlock(&adapter->fw_lock); 5167 return adapter->fw_done_rc ? -EIO : 0; 5168 } 5169 5170 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5171 struct ibmvnic_adapter *adapter) 5172 { 5173 struct net_device *netdev = adapter->netdev; 5174 int rc; 5175 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5176 5177 rc = crq->query_phys_parms_rsp.rc.code; 5178 if (rc) { 5179 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5180 return rc; 5181 } 5182 switch (rspeed) { 5183 case IBMVNIC_10MBPS: 5184 adapter->speed = SPEED_10; 5185 break; 5186 case IBMVNIC_100MBPS: 5187 adapter->speed = SPEED_100; 5188 break; 5189 case IBMVNIC_1GBPS: 5190 adapter->speed = SPEED_1000; 5191 break; 5192 case IBMVNIC_10GBPS: 5193 adapter->speed = SPEED_10000; 5194 break; 5195 case IBMVNIC_25GBPS: 5196 adapter->speed = SPEED_25000; 5197 break; 5198 case IBMVNIC_40GBPS: 5199 adapter->speed = SPEED_40000; 5200 break; 5201 case IBMVNIC_50GBPS: 5202 adapter->speed = SPEED_50000; 5203 break; 5204 case IBMVNIC_100GBPS: 5205 adapter->speed = SPEED_100000; 5206 break; 5207 case IBMVNIC_200GBPS: 5208 adapter->speed = SPEED_200000; 5209 break; 5210 default: 5211 if (netif_carrier_ok(netdev)) 5212 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5213 adapter->speed = SPEED_UNKNOWN; 5214 } 5215 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5216 adapter->duplex = DUPLEX_FULL; 5217 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5218 adapter->duplex = DUPLEX_HALF; 5219 else 5220 adapter->duplex = DUPLEX_UNKNOWN; 5221 5222 return rc; 5223 } 5224 5225 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5226 struct ibmvnic_adapter *adapter) 5227 { 5228 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5229 struct net_device *netdev = adapter->netdev; 5230 struct device *dev = &adapter->vdev->dev; 5231 u64 *u64_crq = (u64 *)crq; 5232 long rc; 5233 5234 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5235 (unsigned long)cpu_to_be64(u64_crq[0]), 5236 (unsigned long)cpu_to_be64(u64_crq[1])); 5237 switch (gen_crq->first) { 5238 case IBMVNIC_CRQ_INIT_RSP: 5239 switch (gen_crq->cmd) { 5240 case IBMVNIC_CRQ_INIT: 5241 dev_info(dev, "Partner initialized\n"); 5242 adapter->from_passive_init = true; 5243 /* Discard any stale login responses from prev reset. 5244 * CHECK: should we clear even on INIT_COMPLETE? 5245 */ 5246 adapter->login_pending = false; 5247 5248 if (adapter->state == VNIC_DOWN) 5249 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5250 else 5251 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5252 5253 if (rc && rc != -EBUSY) { 5254 /* We were unable to schedule the failover 5255 * reset either because the adapter was still 5256 * probing (eg: during kexec) or we could not 5257 * allocate memory. Clear the failover_pending 5258 * flag since no one else will. We ignore 5259 * EBUSY because it means either FAILOVER reset 5260 * is already scheduled or the adapter is 5261 * being removed. 5262 */ 5263 netdev_err(netdev, 5264 "Error %ld scheduling failover reset\n", 5265 rc); 5266 adapter->failover_pending = false; 5267 } 5268 5269 if (!completion_done(&adapter->init_done)) { 5270 complete(&adapter->init_done); 5271 if (!adapter->init_done_rc) 5272 adapter->init_done_rc = -EAGAIN; 5273 } 5274 5275 break; 5276 case IBMVNIC_CRQ_INIT_COMPLETE: 5277 dev_info(dev, "Partner initialization complete\n"); 5278 adapter->crq.active = true; 5279 send_version_xchg(adapter); 5280 break; 5281 default: 5282 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5283 } 5284 return; 5285 case IBMVNIC_CRQ_XPORT_EVENT: 5286 netif_carrier_off(netdev); 5287 adapter->crq.active = false; 5288 /* terminate any thread waiting for a response 5289 * from the device 5290 */ 5291 if (!completion_done(&adapter->fw_done)) { 5292 adapter->fw_done_rc = -EIO; 5293 complete(&adapter->fw_done); 5294 } 5295 if (!completion_done(&adapter->stats_done)) 5296 complete(&adapter->stats_done); 5297 if (test_bit(0, &adapter->resetting)) 5298 adapter->force_reset_recovery = true; 5299 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5300 dev_info(dev, "Migrated, re-enabling adapter\n"); 5301 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5302 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5303 dev_info(dev, "Backing device failover detected\n"); 5304 adapter->failover_pending = true; 5305 } else { 5306 /* The adapter lost the connection */ 5307 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5308 gen_crq->cmd); 5309 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5310 } 5311 return; 5312 case IBMVNIC_CRQ_CMD_RSP: 5313 break; 5314 default: 5315 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5316 gen_crq->first); 5317 return; 5318 } 5319 5320 switch (gen_crq->cmd) { 5321 case VERSION_EXCHANGE_RSP: 5322 rc = crq->version_exchange_rsp.rc.code; 5323 if (rc) { 5324 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5325 break; 5326 } 5327 ibmvnic_version = 5328 be16_to_cpu(crq->version_exchange_rsp.version); 5329 dev_info(dev, "Partner protocol version is %d\n", 5330 ibmvnic_version); 5331 send_query_cap(adapter); 5332 break; 5333 case QUERY_CAPABILITY_RSP: 5334 handle_query_cap_rsp(crq, adapter); 5335 break; 5336 case QUERY_MAP_RSP: 5337 handle_query_map_rsp(crq, adapter); 5338 break; 5339 case REQUEST_MAP_RSP: 5340 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5341 complete(&adapter->fw_done); 5342 break; 5343 case REQUEST_UNMAP_RSP: 5344 handle_request_unmap_rsp(crq, adapter); 5345 break; 5346 case REQUEST_CAPABILITY_RSP: 5347 handle_request_cap_rsp(crq, adapter); 5348 break; 5349 case LOGIN_RSP: 5350 netdev_dbg(netdev, "Got Login Response\n"); 5351 handle_login_rsp(crq, adapter); 5352 break; 5353 case LOGICAL_LINK_STATE_RSP: 5354 netdev_dbg(netdev, 5355 "Got Logical Link State Response, state: %d rc: %d\n", 5356 crq->logical_link_state_rsp.link_state, 5357 crq->logical_link_state_rsp.rc.code); 5358 adapter->logical_link_state = 5359 crq->logical_link_state_rsp.link_state; 5360 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5361 complete(&adapter->init_done); 5362 break; 5363 case LINK_STATE_INDICATION: 5364 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5365 adapter->phys_link_state = 5366 crq->link_state_indication.phys_link_state; 5367 adapter->logical_link_state = 5368 crq->link_state_indication.logical_link_state; 5369 if (adapter->phys_link_state && adapter->logical_link_state) 5370 netif_carrier_on(netdev); 5371 else 5372 netif_carrier_off(netdev); 5373 break; 5374 case CHANGE_MAC_ADDR_RSP: 5375 netdev_dbg(netdev, "Got MAC address change Response\n"); 5376 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5377 break; 5378 case ERROR_INDICATION: 5379 netdev_dbg(netdev, "Got Error Indication\n"); 5380 handle_error_indication(crq, adapter); 5381 break; 5382 case REQUEST_STATISTICS_RSP: 5383 netdev_dbg(netdev, "Got Statistics Response\n"); 5384 complete(&adapter->stats_done); 5385 break; 5386 case QUERY_IP_OFFLOAD_RSP: 5387 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5388 handle_query_ip_offload_rsp(adapter); 5389 break; 5390 case MULTICAST_CTRL_RSP: 5391 netdev_dbg(netdev, "Got multicast control Response\n"); 5392 break; 5393 case CONTROL_IP_OFFLOAD_RSP: 5394 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5395 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5396 sizeof(adapter->ip_offload_ctrl), 5397 DMA_TO_DEVICE); 5398 complete(&adapter->init_done); 5399 break; 5400 case COLLECT_FW_TRACE_RSP: 5401 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5402 complete(&adapter->fw_done); 5403 break; 5404 case GET_VPD_SIZE_RSP: 5405 handle_vpd_size_rsp(crq, adapter); 5406 break; 5407 case GET_VPD_RSP: 5408 handle_vpd_rsp(crq, adapter); 5409 break; 5410 case QUERY_PHYS_PARMS_RSP: 5411 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5412 complete(&adapter->fw_done); 5413 break; 5414 default: 5415 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5416 gen_crq->cmd); 5417 } 5418 } 5419 5420 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5421 { 5422 struct ibmvnic_adapter *adapter = instance; 5423 5424 tasklet_schedule(&adapter->tasklet); 5425 return IRQ_HANDLED; 5426 } 5427 5428 static void ibmvnic_tasklet(struct tasklet_struct *t) 5429 { 5430 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5431 struct ibmvnic_crq_queue *queue = &adapter->crq; 5432 union ibmvnic_crq *crq; 5433 unsigned long flags; 5434 bool done = false; 5435 5436 spin_lock_irqsave(&queue->lock, flags); 5437 while (!done) { 5438 /* Pull all the valid messages off the CRQ */ 5439 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5440 /* This barrier makes sure ibmvnic_next_crq()'s 5441 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5442 * before ibmvnic_handle_crq()'s 5443 * switch(gen_crq->first) and switch(gen_crq->cmd). 5444 */ 5445 dma_rmb(); 5446 ibmvnic_handle_crq(crq, adapter); 5447 crq->generic.first = 0; 5448 } 5449 5450 /* remain in tasklet until all 5451 * capabilities responses are received 5452 */ 5453 if (!adapter->wait_capability) 5454 done = true; 5455 } 5456 /* if capabilities CRQ's were sent in this tasklet, the following 5457 * tasklet must wait until all responses are received 5458 */ 5459 if (atomic_read(&adapter->running_cap_crqs) != 0) 5460 adapter->wait_capability = true; 5461 spin_unlock_irqrestore(&queue->lock, flags); 5462 } 5463 5464 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5465 { 5466 struct vio_dev *vdev = adapter->vdev; 5467 int rc; 5468 5469 do { 5470 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5471 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5472 5473 if (rc) 5474 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5475 5476 return rc; 5477 } 5478 5479 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5480 { 5481 struct ibmvnic_crq_queue *crq = &adapter->crq; 5482 struct device *dev = &adapter->vdev->dev; 5483 struct vio_dev *vdev = adapter->vdev; 5484 int rc; 5485 5486 /* Close the CRQ */ 5487 do { 5488 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5489 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5490 5491 /* Clean out the queue */ 5492 if (!crq->msgs) 5493 return -EINVAL; 5494 5495 memset(crq->msgs, 0, PAGE_SIZE); 5496 crq->cur = 0; 5497 crq->active = false; 5498 5499 /* And re-open it again */ 5500 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5501 crq->msg_token, PAGE_SIZE); 5502 5503 if (rc == H_CLOSED) 5504 /* Adapter is good, but other end is not ready */ 5505 dev_warn(dev, "Partner adapter not ready\n"); 5506 else if (rc != 0) 5507 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5508 5509 return rc; 5510 } 5511 5512 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5513 { 5514 struct ibmvnic_crq_queue *crq = &adapter->crq; 5515 struct vio_dev *vdev = adapter->vdev; 5516 long rc; 5517 5518 if (!crq->msgs) 5519 return; 5520 5521 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5522 free_irq(vdev->irq, adapter); 5523 tasklet_kill(&adapter->tasklet); 5524 do { 5525 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5526 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5527 5528 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5529 DMA_BIDIRECTIONAL); 5530 free_page((unsigned long)crq->msgs); 5531 crq->msgs = NULL; 5532 crq->active = false; 5533 } 5534 5535 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5536 { 5537 struct ibmvnic_crq_queue *crq = &adapter->crq; 5538 struct device *dev = &adapter->vdev->dev; 5539 struct vio_dev *vdev = adapter->vdev; 5540 int rc, retrc = -ENOMEM; 5541 5542 if (crq->msgs) 5543 return 0; 5544 5545 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5546 /* Should we allocate more than one page? */ 5547 5548 if (!crq->msgs) 5549 return -ENOMEM; 5550 5551 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5552 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5553 DMA_BIDIRECTIONAL); 5554 if (dma_mapping_error(dev, crq->msg_token)) 5555 goto map_failed; 5556 5557 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5558 crq->msg_token, PAGE_SIZE); 5559 5560 if (rc == H_RESOURCE) 5561 /* maybe kexecing and resource is busy. try a reset */ 5562 rc = ibmvnic_reset_crq(adapter); 5563 retrc = rc; 5564 5565 if (rc == H_CLOSED) { 5566 dev_warn(dev, "Partner adapter not ready\n"); 5567 } else if (rc) { 5568 dev_warn(dev, "Error %d opening adapter\n", rc); 5569 goto reg_crq_failed; 5570 } 5571 5572 retrc = 0; 5573 5574 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5575 5576 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5577 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5578 adapter->vdev->unit_address); 5579 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5580 if (rc) { 5581 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5582 vdev->irq, rc); 5583 goto req_irq_failed; 5584 } 5585 5586 rc = vio_enable_interrupts(vdev); 5587 if (rc) { 5588 dev_err(dev, "Error %d enabling interrupts\n", rc); 5589 goto req_irq_failed; 5590 } 5591 5592 crq->cur = 0; 5593 spin_lock_init(&crq->lock); 5594 5595 /* process any CRQs that were queued before we enabled interrupts */ 5596 tasklet_schedule(&adapter->tasklet); 5597 5598 return retrc; 5599 5600 req_irq_failed: 5601 tasklet_kill(&adapter->tasklet); 5602 do { 5603 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5604 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5605 reg_crq_failed: 5606 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5607 map_failed: 5608 free_page((unsigned long)crq->msgs); 5609 crq->msgs = NULL; 5610 return retrc; 5611 } 5612 5613 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5614 { 5615 struct device *dev = &adapter->vdev->dev; 5616 unsigned long timeout = msecs_to_jiffies(20000); 5617 u64 old_num_rx_queues = adapter->req_rx_queues; 5618 u64 old_num_tx_queues = adapter->req_tx_queues; 5619 int rc; 5620 5621 adapter->from_passive_init = false; 5622 5623 if (reset) 5624 reinit_completion(&adapter->init_done); 5625 5626 adapter->init_done_rc = 0; 5627 rc = ibmvnic_send_crq_init(adapter); 5628 if (rc) { 5629 dev_err(dev, "Send crq init failed with error %d\n", rc); 5630 return rc; 5631 } 5632 5633 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5634 dev_err(dev, "Initialization sequence timed out\n"); 5635 return -1; 5636 } 5637 5638 if (adapter->init_done_rc) { 5639 release_crq_queue(adapter); 5640 return adapter->init_done_rc; 5641 } 5642 5643 if (adapter->from_passive_init) { 5644 adapter->state = VNIC_OPEN; 5645 adapter->from_passive_init = false; 5646 return -1; 5647 } 5648 5649 if (reset && 5650 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5651 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5652 if (adapter->req_rx_queues != old_num_rx_queues || 5653 adapter->req_tx_queues != old_num_tx_queues) { 5654 release_sub_crqs(adapter, 0); 5655 rc = init_sub_crqs(adapter); 5656 } else { 5657 rc = reset_sub_crq_queues(adapter); 5658 } 5659 } else { 5660 rc = init_sub_crqs(adapter); 5661 } 5662 5663 if (rc) { 5664 dev_err(dev, "Initialization of sub crqs failed\n"); 5665 release_crq_queue(adapter); 5666 return rc; 5667 } 5668 5669 rc = init_sub_crq_irqs(adapter); 5670 if (rc) { 5671 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5672 release_crq_queue(adapter); 5673 } 5674 5675 return rc; 5676 } 5677 5678 static struct device_attribute dev_attr_failover; 5679 5680 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5681 { 5682 struct ibmvnic_adapter *adapter; 5683 struct net_device *netdev; 5684 unsigned char *mac_addr_p; 5685 bool init_success; 5686 int rc; 5687 5688 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5689 dev->unit_address); 5690 5691 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5692 VETH_MAC_ADDR, NULL); 5693 if (!mac_addr_p) { 5694 dev_err(&dev->dev, 5695 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5696 __FILE__, __LINE__); 5697 return 0; 5698 } 5699 5700 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5701 IBMVNIC_MAX_QUEUES); 5702 if (!netdev) 5703 return -ENOMEM; 5704 5705 adapter = netdev_priv(netdev); 5706 adapter->state = VNIC_PROBING; 5707 dev_set_drvdata(&dev->dev, netdev); 5708 adapter->vdev = dev; 5709 adapter->netdev = netdev; 5710 adapter->login_pending = false; 5711 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 5712 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 5713 bitmap_set(adapter->map_ids, 0, 1); 5714 5715 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5716 eth_hw_addr_set(netdev, adapter->mac_addr); 5717 netdev->irq = dev->irq; 5718 netdev->netdev_ops = &ibmvnic_netdev_ops; 5719 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5720 SET_NETDEV_DEV(netdev, &dev->dev); 5721 5722 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5723 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5724 __ibmvnic_delayed_reset); 5725 INIT_LIST_HEAD(&adapter->rwi_list); 5726 spin_lock_init(&adapter->rwi_lock); 5727 spin_lock_init(&adapter->state_lock); 5728 mutex_init(&adapter->fw_lock); 5729 init_completion(&adapter->init_done); 5730 init_completion(&adapter->fw_done); 5731 init_completion(&adapter->reset_done); 5732 init_completion(&adapter->stats_done); 5733 clear_bit(0, &adapter->resetting); 5734 adapter->prev_rx_buf_sz = 0; 5735 adapter->prev_mtu = 0; 5736 5737 init_success = false; 5738 do { 5739 rc = init_crq_queue(adapter); 5740 if (rc) { 5741 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5742 rc); 5743 goto ibmvnic_init_fail; 5744 } 5745 5746 rc = ibmvnic_reset_init(adapter, false); 5747 } while (rc == -EAGAIN); 5748 5749 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5750 * partner is not ready. CRQ is not active. When the partner becomes 5751 * ready, we will do the passive init reset. 5752 */ 5753 5754 if (!rc) 5755 init_success = true; 5756 5757 rc = init_stats_buffers(adapter); 5758 if (rc) 5759 goto ibmvnic_init_fail; 5760 5761 rc = init_stats_token(adapter); 5762 if (rc) 5763 goto ibmvnic_stats_fail; 5764 5765 rc = device_create_file(&dev->dev, &dev_attr_failover); 5766 if (rc) 5767 goto ibmvnic_dev_file_err; 5768 5769 netif_carrier_off(netdev); 5770 rc = register_netdev(netdev); 5771 if (rc) { 5772 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5773 goto ibmvnic_register_fail; 5774 } 5775 dev_info(&dev->dev, "ibmvnic registered\n"); 5776 5777 if (init_success) { 5778 adapter->state = VNIC_PROBED; 5779 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5780 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5781 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5782 } else { 5783 adapter->state = VNIC_DOWN; 5784 } 5785 5786 adapter->wait_for_reset = false; 5787 adapter->last_reset_time = jiffies; 5788 return 0; 5789 5790 ibmvnic_register_fail: 5791 device_remove_file(&dev->dev, &dev_attr_failover); 5792 5793 ibmvnic_dev_file_err: 5794 release_stats_token(adapter); 5795 5796 ibmvnic_stats_fail: 5797 release_stats_buffers(adapter); 5798 5799 ibmvnic_init_fail: 5800 release_sub_crqs(adapter, 1); 5801 release_crq_queue(adapter); 5802 mutex_destroy(&adapter->fw_lock); 5803 free_netdev(netdev); 5804 5805 return rc; 5806 } 5807 5808 static void ibmvnic_remove(struct vio_dev *dev) 5809 { 5810 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5811 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5812 unsigned long flags; 5813 5814 spin_lock_irqsave(&adapter->state_lock, flags); 5815 5816 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5817 * finish. Then, set the state to REMOVING to prevent it from 5818 * scheduling any more work and to have reset functions ignore 5819 * any resets that have already been scheduled. Drop the lock 5820 * after setting state, so __ibmvnic_reset() which is called 5821 * from the flush_work() below, can make progress. 5822 */ 5823 spin_lock(&adapter->rwi_lock); 5824 adapter->state = VNIC_REMOVING; 5825 spin_unlock(&adapter->rwi_lock); 5826 5827 spin_unlock_irqrestore(&adapter->state_lock, flags); 5828 5829 flush_work(&adapter->ibmvnic_reset); 5830 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5831 5832 rtnl_lock(); 5833 unregister_netdevice(netdev); 5834 5835 release_resources(adapter); 5836 release_rx_pools(adapter); 5837 release_tx_pools(adapter); 5838 release_sub_crqs(adapter, 1); 5839 release_crq_queue(adapter); 5840 5841 release_stats_token(adapter); 5842 release_stats_buffers(adapter); 5843 5844 adapter->state = VNIC_REMOVED; 5845 5846 rtnl_unlock(); 5847 mutex_destroy(&adapter->fw_lock); 5848 device_remove_file(&dev->dev, &dev_attr_failover); 5849 free_netdev(netdev); 5850 dev_set_drvdata(&dev->dev, NULL); 5851 } 5852 5853 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5854 const char *buf, size_t count) 5855 { 5856 struct net_device *netdev = dev_get_drvdata(dev); 5857 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5858 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5859 __be64 session_token; 5860 long rc; 5861 5862 if (!sysfs_streq(buf, "1")) 5863 return -EINVAL; 5864 5865 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5866 H_GET_SESSION_TOKEN, 0, 0, 0); 5867 if (rc) { 5868 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5869 rc); 5870 goto last_resort; 5871 } 5872 5873 session_token = (__be64)retbuf[0]; 5874 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5875 be64_to_cpu(session_token)); 5876 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5877 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5878 if (rc) 5879 netdev_err(netdev, 5880 "H_VIOCTL initiated failover failed, rc %ld\n", 5881 rc); 5882 5883 last_resort: 5884 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5885 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5886 5887 return count; 5888 } 5889 static DEVICE_ATTR_WO(failover); 5890 5891 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5892 { 5893 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5894 struct ibmvnic_adapter *adapter; 5895 struct iommu_table *tbl; 5896 unsigned long ret = 0; 5897 int i; 5898 5899 tbl = get_iommu_table_base(&vdev->dev); 5900 5901 /* netdev inits at probe time along with the structures we need below*/ 5902 if (!netdev) 5903 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5904 5905 adapter = netdev_priv(netdev); 5906 5907 ret += PAGE_SIZE; /* the crq message queue */ 5908 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5909 5910 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5911 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5912 5913 for (i = 0; i < adapter->num_active_rx_pools; i++) 5914 ret += adapter->rx_pool[i].size * 5915 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5916 5917 return ret; 5918 } 5919 5920 static int ibmvnic_resume(struct device *dev) 5921 { 5922 struct net_device *netdev = dev_get_drvdata(dev); 5923 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5924 5925 if (adapter->state != VNIC_OPEN) 5926 return 0; 5927 5928 tasklet_schedule(&adapter->tasklet); 5929 5930 return 0; 5931 } 5932 5933 static const struct vio_device_id ibmvnic_device_table[] = { 5934 {"network", "IBM,vnic"}, 5935 {"", "" } 5936 }; 5937 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5938 5939 static const struct dev_pm_ops ibmvnic_pm_ops = { 5940 .resume = ibmvnic_resume 5941 }; 5942 5943 static struct vio_driver ibmvnic_driver = { 5944 .id_table = ibmvnic_device_table, 5945 .probe = ibmvnic_probe, 5946 .remove = ibmvnic_remove, 5947 .get_desired_dma = ibmvnic_get_desired_dma, 5948 .name = ibmvnic_driver_name, 5949 .pm = &ibmvnic_pm_ops, 5950 }; 5951 5952 /* module functions */ 5953 static int __init ibmvnic_module_init(void) 5954 { 5955 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5956 IBMVNIC_DRIVER_VERSION); 5957 5958 return vio_register_driver(&ibmvnic_driver); 5959 } 5960 5961 static void __exit ibmvnic_module_exit(void) 5962 { 5963 vio_unregister_driver(&ibmvnic_driver); 5964 } 5965 5966 module_init(ibmvnic_module_init); 5967 module_exit(ibmvnic_module_exit); 5968