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/xive.h> 64 #include <asm/iommu.h> 65 #include <linux/uaccess.h> 66 #include <asm/firmware.h> 67 #include <linux/workqueue.h> 68 #include <linux/if_vlan.h> 69 #include <linux/utsname.h> 70 71 #include "ibmvnic.h" 72 73 static const char ibmvnic_driver_name[] = "ibmvnic"; 74 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 75 76 MODULE_AUTHOR("Santiago Leon"); 77 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 78 MODULE_LICENSE("GPL"); 79 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 80 81 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 88 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 89 static int enable_scrq_irq(struct ibmvnic_adapter *, 90 struct ibmvnic_sub_crq_queue *); 91 static int disable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int pending_scrq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static int ibmvnic_poll(struct napi_struct *napi, int data); 98 static void send_query_map(struct ibmvnic_adapter *adapter); 99 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 100 static int send_request_unmap(struct ibmvnic_adapter *, u8); 101 static int send_login(struct ibmvnic_adapter *adapter); 102 static void send_query_cap(struct ibmvnic_adapter *adapter); 103 static int init_sub_crqs(struct ibmvnic_adapter *); 104 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 105 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 106 static void release_crq_queue(struct ibmvnic_adapter *); 107 static int __ibmvnic_set_mac(struct net_device *, u8 *); 108 static int init_crq_queue(struct ibmvnic_adapter *adapter); 109 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 110 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 111 struct ibmvnic_sub_crq_queue *tx_scrq); 112 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 113 struct ibmvnic_long_term_buff *ltb); 114 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 115 116 struct ibmvnic_stat { 117 char name[ETH_GSTRING_LEN]; 118 int offset; 119 }; 120 121 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 122 offsetof(struct ibmvnic_statistics, stat)) 123 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 124 125 static const struct ibmvnic_stat ibmvnic_stats[] = { 126 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 127 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 128 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 129 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 130 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 131 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 132 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 133 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 134 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 135 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 136 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 137 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 138 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 139 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 140 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 141 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 142 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 143 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 144 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 145 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 146 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 147 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 148 }; 149 150 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 151 { 152 union ibmvnic_crq crq; 153 154 memset(&crq, 0, sizeof(crq)); 155 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 156 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 157 158 return ibmvnic_send_crq(adapter, &crq); 159 } 160 161 static int send_version_xchg(struct ibmvnic_adapter *adapter) 162 { 163 union ibmvnic_crq crq; 164 165 memset(&crq, 0, sizeof(crq)); 166 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 167 crq.version_exchange.cmd = VERSION_EXCHANGE; 168 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 169 170 return ibmvnic_send_crq(adapter, &crq); 171 } 172 173 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 174 unsigned long length, unsigned long *number, 175 unsigned long *irq) 176 { 177 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 178 long rc; 179 180 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 181 *number = retbuf[0]; 182 *irq = retbuf[1]; 183 184 return rc; 185 } 186 187 /** 188 * ibmvnic_wait_for_completion - Check device state and wait for completion 189 * @adapter: private device data 190 * @comp_done: completion structure to wait for 191 * @timeout: time to wait in milliseconds 192 * 193 * Wait for a completion signal or until the timeout limit is reached 194 * while checking that the device is still active. 195 */ 196 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 197 struct completion *comp_done, 198 unsigned long timeout) 199 { 200 struct net_device *netdev; 201 unsigned long div_timeout; 202 u8 retry; 203 204 netdev = adapter->netdev; 205 retry = 5; 206 div_timeout = msecs_to_jiffies(timeout / retry); 207 while (true) { 208 if (!adapter->crq.active) { 209 netdev_err(netdev, "Device down!\n"); 210 return -ENODEV; 211 } 212 if (!retry--) 213 break; 214 if (wait_for_completion_timeout(comp_done, div_timeout)) 215 return 0; 216 } 217 netdev_err(netdev, "Operation timed out.\n"); 218 return -ETIMEDOUT; 219 } 220 221 /** 222 * reuse_ltb() - Check if a long term buffer can be reused 223 * @ltb: The long term buffer to be checked 224 * @size: The size of the long term buffer. 225 * 226 * An LTB can be reused unless its size has changed. 227 * 228 * Return: Return true if the LTB can be reused, false otherwise. 229 */ 230 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 231 { 232 return (ltb->buff && ltb->size == size); 233 } 234 235 /** 236 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 237 * 238 * @adapter: ibmvnic adapter associated to the LTB 239 * @ltb: container object for the LTB 240 * @size: size of the LTB 241 * 242 * Allocate an LTB of the specified size and notify VIOS. 243 * 244 * If the given @ltb already has the correct size, reuse it. Otherwise if 245 * its non-NULL, free it. Then allocate a new one of the correct size. 246 * Notify the VIOS either way since we may now be working with a new VIOS. 247 * 248 * Allocating larger chunks of memory during resets, specially LPM or under 249 * low memory situations can cause resets to fail/timeout and for LPAR to 250 * lose connectivity. So hold onto the LTB even if we fail to communicate 251 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 252 * 253 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 254 * a negative value otherwise. 255 */ 256 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 257 struct ibmvnic_long_term_buff *ltb, int size) 258 { 259 struct device *dev = &adapter->vdev->dev; 260 int rc; 261 262 if (!reuse_ltb(ltb, size)) { 263 dev_dbg(dev, 264 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 265 ltb->size, size); 266 free_long_term_buff(adapter, ltb); 267 } 268 269 if (ltb->buff) { 270 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 271 ltb->map_id, ltb->size); 272 } else { 273 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 274 GFP_KERNEL); 275 if (!ltb->buff) { 276 dev_err(dev, "Couldn't alloc long term buffer\n"); 277 return -ENOMEM; 278 } 279 ltb->size = size; 280 281 ltb->map_id = find_first_zero_bit(adapter->map_ids, 282 MAX_MAP_ID); 283 bitmap_set(adapter->map_ids, ltb->map_id, 1); 284 285 dev_dbg(dev, 286 "Allocated new LTB [map %d, size 0x%llx]\n", 287 ltb->map_id, ltb->size); 288 } 289 290 /* Ensure ltb is zeroed - specially when reusing it. */ 291 memset(ltb->buff, 0, ltb->size); 292 293 mutex_lock(&adapter->fw_lock); 294 adapter->fw_done_rc = 0; 295 reinit_completion(&adapter->fw_done); 296 297 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 298 if (rc) { 299 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 300 goto out; 301 } 302 303 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 304 if (rc) { 305 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 306 rc); 307 goto out; 308 } 309 310 if (adapter->fw_done_rc) { 311 dev_err(dev, "Couldn't map LTB, rc = %d\n", 312 adapter->fw_done_rc); 313 rc = -EIO; 314 goto out; 315 } 316 rc = 0; 317 out: 318 /* don't free LTB on communication error - see function header */ 319 mutex_unlock(&adapter->fw_lock); 320 return rc; 321 } 322 323 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 324 struct ibmvnic_long_term_buff *ltb) 325 { 326 struct device *dev = &adapter->vdev->dev; 327 328 if (!ltb->buff) 329 return; 330 331 /* VIOS automatically unmaps the long term buffer at remote 332 * end for the following resets: 333 * FAILOVER, MOBILITY, TIMEOUT. 334 */ 335 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 336 adapter->reset_reason != VNIC_RESET_MOBILITY && 337 adapter->reset_reason != VNIC_RESET_TIMEOUT) 338 send_request_unmap(adapter, ltb->map_id); 339 340 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 341 342 ltb->buff = NULL; 343 /* mark this map_id free */ 344 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 345 ltb->map_id = 0; 346 } 347 348 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 349 { 350 int i; 351 352 for (i = 0; i < adapter->num_active_rx_pools; i++) 353 adapter->rx_pool[i].active = 0; 354 } 355 356 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 357 struct ibmvnic_rx_pool *pool) 358 { 359 int count = pool->size - atomic_read(&pool->available); 360 u64 handle = adapter->rx_scrq[pool->index]->handle; 361 struct device *dev = &adapter->vdev->dev; 362 struct ibmvnic_ind_xmit_queue *ind_bufp; 363 struct ibmvnic_sub_crq_queue *rx_scrq; 364 union sub_crq *sub_crq; 365 int buffers_added = 0; 366 unsigned long lpar_rc; 367 struct sk_buff *skb; 368 unsigned int offset; 369 dma_addr_t dma_addr; 370 unsigned char *dst; 371 int shift = 0; 372 int bufidx; 373 int i; 374 375 if (!pool->active) 376 return; 377 378 rx_scrq = adapter->rx_scrq[pool->index]; 379 ind_bufp = &rx_scrq->ind_buf; 380 381 /* netdev_skb_alloc() could have failed after we saved a few skbs 382 * in the indir_buf and we would not have sent them to VIOS yet. 383 * To account for them, start the loop at ind_bufp->index rather 384 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 385 * be 0. 386 */ 387 for (i = ind_bufp->index; i < count; ++i) { 388 bufidx = pool->free_map[pool->next_free]; 389 390 /* We maybe reusing the skb from earlier resets. Allocate 391 * only if necessary. But since the LTB may have changed 392 * during reset (see init_rx_pools()), update LTB below 393 * even if reusing skb. 394 */ 395 skb = pool->rx_buff[bufidx].skb; 396 if (!skb) { 397 skb = netdev_alloc_skb(adapter->netdev, 398 pool->buff_size); 399 if (!skb) { 400 dev_err(dev, "Couldn't replenish rx buff\n"); 401 adapter->replenish_no_mem++; 402 break; 403 } 404 } 405 406 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 407 pool->next_free = (pool->next_free + 1) % pool->size; 408 409 /* Copy the skb to the long term mapped DMA buffer */ 410 offset = bufidx * pool->buff_size; 411 dst = pool->long_term_buff.buff + offset; 412 memset(dst, 0, pool->buff_size); 413 dma_addr = pool->long_term_buff.addr + offset; 414 415 /* add the skb to an rx_buff in the pool */ 416 pool->rx_buff[bufidx].data = dst; 417 pool->rx_buff[bufidx].dma = dma_addr; 418 pool->rx_buff[bufidx].skb = skb; 419 pool->rx_buff[bufidx].pool_index = pool->index; 420 pool->rx_buff[bufidx].size = pool->buff_size; 421 422 /* queue the rx_buff for the next send_subcrq_indirect */ 423 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 424 memset(sub_crq, 0, sizeof(*sub_crq)); 425 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 426 sub_crq->rx_add.correlator = 427 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 428 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 429 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 430 431 /* The length field of the sCRQ is defined to be 24 bits so the 432 * buffer size needs to be left shifted by a byte before it is 433 * converted to big endian to prevent the last byte from being 434 * truncated. 435 */ 436 #ifdef __LITTLE_ENDIAN__ 437 shift = 8; 438 #endif 439 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 440 441 /* if send_subcrq_indirect queue is full, flush to VIOS */ 442 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 443 i == count - 1) { 444 lpar_rc = 445 send_subcrq_indirect(adapter, handle, 446 (u64)ind_bufp->indir_dma, 447 (u64)ind_bufp->index); 448 if (lpar_rc != H_SUCCESS) 449 goto failure; 450 buffers_added += ind_bufp->index; 451 adapter->replenish_add_buff_success += ind_bufp->index; 452 ind_bufp->index = 0; 453 } 454 } 455 atomic_add(buffers_added, &pool->available); 456 return; 457 458 failure: 459 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 460 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 461 for (i = ind_bufp->index - 1; i >= 0; --i) { 462 struct ibmvnic_rx_buff *rx_buff; 463 464 pool->next_free = pool->next_free == 0 ? 465 pool->size - 1 : pool->next_free - 1; 466 sub_crq = &ind_bufp->indir_arr[i]; 467 rx_buff = (struct ibmvnic_rx_buff *) 468 be64_to_cpu(sub_crq->rx_add.correlator); 469 bufidx = (int)(rx_buff - pool->rx_buff); 470 pool->free_map[pool->next_free] = bufidx; 471 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 472 pool->rx_buff[bufidx].skb = NULL; 473 } 474 adapter->replenish_add_buff_failure += ind_bufp->index; 475 atomic_add(buffers_added, &pool->available); 476 ind_bufp->index = 0; 477 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 478 /* Disable buffer pool replenishment and report carrier off if 479 * queue is closed or pending failover. 480 * Firmware guarantees that a signal will be sent to the 481 * driver, triggering a reset. 482 */ 483 deactivate_rx_pools(adapter); 484 netif_carrier_off(adapter->netdev); 485 } 486 } 487 488 static void replenish_pools(struct ibmvnic_adapter *adapter) 489 { 490 int i; 491 492 adapter->replenish_task_cycles++; 493 for (i = 0; i < adapter->num_active_rx_pools; i++) { 494 if (adapter->rx_pool[i].active) 495 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 496 } 497 498 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 499 } 500 501 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 502 { 503 kfree(adapter->tx_stats_buffers); 504 kfree(adapter->rx_stats_buffers); 505 adapter->tx_stats_buffers = NULL; 506 adapter->rx_stats_buffers = NULL; 507 } 508 509 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 510 { 511 adapter->tx_stats_buffers = 512 kcalloc(IBMVNIC_MAX_QUEUES, 513 sizeof(struct ibmvnic_tx_queue_stats), 514 GFP_KERNEL); 515 if (!adapter->tx_stats_buffers) 516 return -ENOMEM; 517 518 adapter->rx_stats_buffers = 519 kcalloc(IBMVNIC_MAX_QUEUES, 520 sizeof(struct ibmvnic_rx_queue_stats), 521 GFP_KERNEL); 522 if (!adapter->rx_stats_buffers) 523 return -ENOMEM; 524 525 return 0; 526 } 527 528 static void release_stats_token(struct ibmvnic_adapter *adapter) 529 { 530 struct device *dev = &adapter->vdev->dev; 531 532 if (!adapter->stats_token) 533 return; 534 535 dma_unmap_single(dev, adapter->stats_token, 536 sizeof(struct ibmvnic_statistics), 537 DMA_FROM_DEVICE); 538 adapter->stats_token = 0; 539 } 540 541 static int init_stats_token(struct ibmvnic_adapter *adapter) 542 { 543 struct device *dev = &adapter->vdev->dev; 544 dma_addr_t stok; 545 int rc; 546 547 stok = dma_map_single(dev, &adapter->stats, 548 sizeof(struct ibmvnic_statistics), 549 DMA_FROM_DEVICE); 550 rc = dma_mapping_error(dev, stok); 551 if (rc) { 552 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 553 return rc; 554 } 555 556 adapter->stats_token = stok; 557 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 558 return 0; 559 } 560 561 /** 562 * release_rx_pools() - Release any rx pools attached to @adapter. 563 * @adapter: ibmvnic adapter 564 * 565 * Safe to call this multiple times - even if no pools are attached. 566 */ 567 static void release_rx_pools(struct ibmvnic_adapter *adapter) 568 { 569 struct ibmvnic_rx_pool *rx_pool; 570 int i, j; 571 572 if (!adapter->rx_pool) 573 return; 574 575 for (i = 0; i < adapter->num_active_rx_pools; i++) { 576 rx_pool = &adapter->rx_pool[i]; 577 578 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 579 580 kfree(rx_pool->free_map); 581 582 free_long_term_buff(adapter, &rx_pool->long_term_buff); 583 584 if (!rx_pool->rx_buff) 585 continue; 586 587 for (j = 0; j < rx_pool->size; j++) { 588 if (rx_pool->rx_buff[j].skb) { 589 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 590 rx_pool->rx_buff[j].skb = NULL; 591 } 592 } 593 594 kfree(rx_pool->rx_buff); 595 } 596 597 kfree(adapter->rx_pool); 598 adapter->rx_pool = NULL; 599 adapter->num_active_rx_pools = 0; 600 adapter->prev_rx_pool_size = 0; 601 } 602 603 /** 604 * reuse_rx_pools() - Check if the existing rx pools can be reused. 605 * @adapter: ibmvnic adapter 606 * 607 * Check if the existing rx pools in the adapter can be reused. The 608 * pools can be reused if the pool parameters (number of pools, 609 * number of buffers in the pool and size of each buffer) have not 610 * changed. 611 * 612 * NOTE: This assumes that all pools have the same number of buffers 613 * which is the case currently. If that changes, we must fix this. 614 * 615 * Return: true if the rx pools can be reused, false otherwise. 616 */ 617 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 618 { 619 u64 old_num_pools, new_num_pools; 620 u64 old_pool_size, new_pool_size; 621 u64 old_buff_size, new_buff_size; 622 623 if (!adapter->rx_pool) 624 return false; 625 626 old_num_pools = adapter->num_active_rx_pools; 627 new_num_pools = adapter->req_rx_queues; 628 629 old_pool_size = adapter->prev_rx_pool_size; 630 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 631 632 old_buff_size = adapter->prev_rx_buf_sz; 633 new_buff_size = adapter->cur_rx_buf_sz; 634 635 if (old_buff_size != new_buff_size || 636 old_num_pools != new_num_pools || 637 old_pool_size != new_pool_size) 638 return false; 639 640 return true; 641 } 642 643 /** 644 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 645 * @netdev: net device associated with the vnic interface 646 * 647 * Initialize the set of receiver pools in the ibmvnic adapter associated 648 * with the net_device @netdev. If possible, reuse the existing rx pools. 649 * Otherwise free any existing pools and allocate a new set of pools 650 * before initializing them. 651 * 652 * Return: 0 on success and negative value on error. 653 */ 654 static int init_rx_pools(struct net_device *netdev) 655 { 656 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 657 struct device *dev = &adapter->vdev->dev; 658 struct ibmvnic_rx_pool *rx_pool; 659 u64 num_pools; 660 u64 pool_size; /* # of buffers in one pool */ 661 u64 buff_size; 662 int i, j, rc; 663 664 pool_size = adapter->req_rx_add_entries_per_subcrq; 665 num_pools = adapter->req_rx_queues; 666 buff_size = adapter->cur_rx_buf_sz; 667 668 if (reuse_rx_pools(adapter)) { 669 dev_dbg(dev, "Reusing rx pools\n"); 670 goto update_ltb; 671 } 672 673 /* Allocate/populate the pools. */ 674 release_rx_pools(adapter); 675 676 adapter->rx_pool = kcalloc(num_pools, 677 sizeof(struct ibmvnic_rx_pool), 678 GFP_KERNEL); 679 if (!adapter->rx_pool) { 680 dev_err(dev, "Failed to allocate rx pools\n"); 681 return -ENOMEM; 682 } 683 684 /* Set num_active_rx_pools early. If we fail below after partial 685 * allocation, release_rx_pools() will know how many to look for. 686 */ 687 adapter->num_active_rx_pools = num_pools; 688 689 for (i = 0; i < num_pools; i++) { 690 rx_pool = &adapter->rx_pool[i]; 691 692 netdev_dbg(adapter->netdev, 693 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 694 i, pool_size, buff_size); 695 696 rx_pool->size = pool_size; 697 rx_pool->index = i; 698 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 699 700 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 701 GFP_KERNEL); 702 if (!rx_pool->free_map) { 703 dev_err(dev, "Couldn't alloc free_map %d\n", i); 704 rc = -ENOMEM; 705 goto out_release; 706 } 707 708 rx_pool->rx_buff = kcalloc(rx_pool->size, 709 sizeof(struct ibmvnic_rx_buff), 710 GFP_KERNEL); 711 if (!rx_pool->rx_buff) { 712 dev_err(dev, "Couldn't alloc rx buffers\n"); 713 rc = -ENOMEM; 714 goto out_release; 715 } 716 } 717 718 adapter->prev_rx_pool_size = pool_size; 719 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 720 721 update_ltb: 722 for (i = 0; i < num_pools; i++) { 723 rx_pool = &adapter->rx_pool[i]; 724 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 725 i, rx_pool->size, rx_pool->buff_size); 726 727 rc = alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 728 rx_pool->size * rx_pool->buff_size); 729 if (rc) 730 goto out; 731 732 for (j = 0; j < rx_pool->size; ++j) { 733 struct ibmvnic_rx_buff *rx_buff; 734 735 rx_pool->free_map[j] = j; 736 737 /* NOTE: Don't clear rx_buff->skb here - will leak 738 * memory! replenish_rx_pool() will reuse skbs or 739 * allocate as necessary. 740 */ 741 rx_buff = &rx_pool->rx_buff[j]; 742 rx_buff->dma = 0; 743 rx_buff->data = 0; 744 rx_buff->size = 0; 745 rx_buff->pool_index = 0; 746 } 747 748 /* Mark pool "empty" so replenish_rx_pools() will 749 * update the LTB info for each buffer 750 */ 751 atomic_set(&rx_pool->available, 0); 752 rx_pool->next_alloc = 0; 753 rx_pool->next_free = 0; 754 /* replenish_rx_pool() may have called deactivate_rx_pools() 755 * on failover. Ensure pool is active now. 756 */ 757 rx_pool->active = 1; 758 } 759 return 0; 760 out_release: 761 release_rx_pools(adapter); 762 out: 763 /* We failed to allocate one or more LTBs or map them on the VIOS. 764 * Hold onto the pools and any LTBs that we did allocate/map. 765 */ 766 return rc; 767 } 768 769 static void release_vpd_data(struct ibmvnic_adapter *adapter) 770 { 771 if (!adapter->vpd) 772 return; 773 774 kfree(adapter->vpd->buff); 775 kfree(adapter->vpd); 776 777 adapter->vpd = NULL; 778 } 779 780 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 781 struct ibmvnic_tx_pool *tx_pool) 782 { 783 kfree(tx_pool->tx_buff); 784 kfree(tx_pool->free_map); 785 free_long_term_buff(adapter, &tx_pool->long_term_buff); 786 } 787 788 /** 789 * release_tx_pools() - Release any tx pools attached to @adapter. 790 * @adapter: ibmvnic adapter 791 * 792 * Safe to call this multiple times - even if no pools are attached. 793 */ 794 static void release_tx_pools(struct ibmvnic_adapter *adapter) 795 { 796 int i; 797 798 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 799 * both NULL or both non-NULL. So we only need to check one. 800 */ 801 if (!adapter->tx_pool) 802 return; 803 804 for (i = 0; i < adapter->num_active_tx_pools; i++) { 805 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 806 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 807 } 808 809 kfree(adapter->tx_pool); 810 adapter->tx_pool = NULL; 811 kfree(adapter->tso_pool); 812 adapter->tso_pool = NULL; 813 adapter->num_active_tx_pools = 0; 814 adapter->prev_tx_pool_size = 0; 815 } 816 817 static int init_one_tx_pool(struct net_device *netdev, 818 struct ibmvnic_tx_pool *tx_pool, 819 int pool_size, int buf_size) 820 { 821 int i; 822 823 tx_pool->tx_buff = kcalloc(pool_size, 824 sizeof(struct ibmvnic_tx_buff), 825 GFP_KERNEL); 826 if (!tx_pool->tx_buff) 827 return -ENOMEM; 828 829 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 830 if (!tx_pool->free_map) { 831 kfree(tx_pool->tx_buff); 832 tx_pool->tx_buff = NULL; 833 return -ENOMEM; 834 } 835 836 for (i = 0; i < pool_size; i++) 837 tx_pool->free_map[i] = i; 838 839 tx_pool->consumer_index = 0; 840 tx_pool->producer_index = 0; 841 tx_pool->num_buffers = pool_size; 842 tx_pool->buf_size = buf_size; 843 844 return 0; 845 } 846 847 /** 848 * reuse_tx_pools() - Check if the existing tx pools can be reused. 849 * @adapter: ibmvnic adapter 850 * 851 * Check if the existing tx pools in the adapter can be reused. The 852 * pools can be reused if the pool parameters (number of pools, 853 * number of buffers in the pool and mtu) have not changed. 854 * 855 * NOTE: This assumes that all pools have the same number of buffers 856 * which is the case currently. If that changes, we must fix this. 857 * 858 * Return: true if the tx pools can be reused, false otherwise. 859 */ 860 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 861 { 862 u64 old_num_pools, new_num_pools; 863 u64 old_pool_size, new_pool_size; 864 u64 old_mtu, new_mtu; 865 866 if (!adapter->tx_pool) 867 return false; 868 869 old_num_pools = adapter->num_active_tx_pools; 870 new_num_pools = adapter->num_active_tx_scrqs; 871 old_pool_size = adapter->prev_tx_pool_size; 872 new_pool_size = adapter->req_tx_entries_per_subcrq; 873 old_mtu = adapter->prev_mtu; 874 new_mtu = adapter->req_mtu; 875 876 if (old_mtu != new_mtu || 877 old_num_pools != new_num_pools || 878 old_pool_size != new_pool_size) 879 return false; 880 881 return true; 882 } 883 884 /** 885 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 886 * @netdev: net device associated with the vnic interface 887 * 888 * Initialize the set of transmit pools in the ibmvnic adapter associated 889 * with the net_device @netdev. If possible, reuse the existing tx pools. 890 * Otherwise free any existing pools and allocate a new set of pools 891 * before initializing them. 892 * 893 * Return: 0 on success and negative value on error. 894 */ 895 static int init_tx_pools(struct net_device *netdev) 896 { 897 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 898 struct device *dev = &adapter->vdev->dev; 899 int num_pools; 900 u64 pool_size; /* # of buffers in pool */ 901 u64 buff_size; 902 int i, j, rc; 903 904 num_pools = adapter->req_tx_queues; 905 906 /* We must notify the VIOS about the LTB on all resets - but we only 907 * need to alloc/populate pools if either the number of buffers or 908 * size of each buffer in the pool has changed. 909 */ 910 if (reuse_tx_pools(adapter)) { 911 netdev_dbg(netdev, "Reusing tx pools\n"); 912 goto update_ltb; 913 } 914 915 /* Allocate/populate the pools. */ 916 release_tx_pools(adapter); 917 918 pool_size = adapter->req_tx_entries_per_subcrq; 919 num_pools = adapter->num_active_tx_scrqs; 920 921 adapter->tx_pool = kcalloc(num_pools, 922 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 923 if (!adapter->tx_pool) 924 return -ENOMEM; 925 926 adapter->tso_pool = kcalloc(num_pools, 927 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 928 /* To simplify release_tx_pools() ensure that ->tx_pool and 929 * ->tso_pool are either both NULL or both non-NULL. 930 */ 931 if (!adapter->tso_pool) { 932 kfree(adapter->tx_pool); 933 adapter->tx_pool = NULL; 934 return -ENOMEM; 935 } 936 937 /* Set num_active_tx_pools early. If we fail below after partial 938 * allocation, release_tx_pools() will know how many to look for. 939 */ 940 adapter->num_active_tx_pools = num_pools; 941 942 buff_size = adapter->req_mtu + VLAN_HLEN; 943 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 944 945 for (i = 0; i < num_pools; i++) { 946 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 947 i, adapter->req_tx_entries_per_subcrq, buff_size); 948 949 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 950 pool_size, buff_size); 951 if (rc) 952 goto out_release; 953 954 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 955 IBMVNIC_TSO_BUFS, 956 IBMVNIC_TSO_BUF_SZ); 957 if (rc) 958 goto out_release; 959 } 960 961 adapter->prev_tx_pool_size = pool_size; 962 adapter->prev_mtu = adapter->req_mtu; 963 964 update_ltb: 965 /* NOTE: All tx_pools have the same number of buffers (which is 966 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 967 * buffers (see calls init_one_tx_pool() for these). 968 * For consistency, we use tx_pool->num_buffers and 969 * tso_pool->num_buffers below. 970 */ 971 rc = -1; 972 for (i = 0; i < num_pools; i++) { 973 struct ibmvnic_tx_pool *tso_pool; 974 struct ibmvnic_tx_pool *tx_pool; 975 u32 ltb_size; 976 977 tx_pool = &adapter->tx_pool[i]; 978 ltb_size = tx_pool->num_buffers * tx_pool->buf_size; 979 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 980 ltb_size)) 981 goto out; 982 983 dev_dbg(dev, "Updated LTB for tx pool %d [%p, %d, %d]\n", 984 i, tx_pool->long_term_buff.buff, 985 tx_pool->num_buffers, tx_pool->buf_size); 986 987 tx_pool->consumer_index = 0; 988 tx_pool->producer_index = 0; 989 990 for (j = 0; j < tx_pool->num_buffers; j++) 991 tx_pool->free_map[j] = j; 992 993 tso_pool = &adapter->tso_pool[i]; 994 ltb_size = tso_pool->num_buffers * tso_pool->buf_size; 995 if (alloc_long_term_buff(adapter, &tso_pool->long_term_buff, 996 ltb_size)) 997 goto out; 998 999 dev_dbg(dev, "Updated LTB for tso pool %d [%p, %d, %d]\n", 1000 i, tso_pool->long_term_buff.buff, 1001 tso_pool->num_buffers, tso_pool->buf_size); 1002 1003 tso_pool->consumer_index = 0; 1004 tso_pool->producer_index = 0; 1005 1006 for (j = 0; j < tso_pool->num_buffers; j++) 1007 tso_pool->free_map[j] = j; 1008 } 1009 1010 return 0; 1011 out_release: 1012 release_tx_pools(adapter); 1013 out: 1014 /* We failed to allocate one or more LTBs or map them on the VIOS. 1015 * Hold onto the pools and any LTBs that we did allocate/map. 1016 */ 1017 return rc; 1018 } 1019 1020 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1021 { 1022 int i; 1023 1024 if (adapter->napi_enabled) 1025 return; 1026 1027 for (i = 0; i < adapter->req_rx_queues; i++) 1028 napi_enable(&adapter->napi[i]); 1029 1030 adapter->napi_enabled = true; 1031 } 1032 1033 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1034 { 1035 int i; 1036 1037 if (!adapter->napi_enabled) 1038 return; 1039 1040 for (i = 0; i < adapter->req_rx_queues; i++) { 1041 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1042 napi_disable(&adapter->napi[i]); 1043 } 1044 1045 adapter->napi_enabled = false; 1046 } 1047 1048 static int init_napi(struct ibmvnic_adapter *adapter) 1049 { 1050 int i; 1051 1052 adapter->napi = kcalloc(adapter->req_rx_queues, 1053 sizeof(struct napi_struct), GFP_KERNEL); 1054 if (!adapter->napi) 1055 return -ENOMEM; 1056 1057 for (i = 0; i < adapter->req_rx_queues; i++) { 1058 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1059 netif_napi_add(adapter->netdev, &adapter->napi[i], 1060 ibmvnic_poll, NAPI_POLL_WEIGHT); 1061 } 1062 1063 adapter->num_active_rx_napi = adapter->req_rx_queues; 1064 return 0; 1065 } 1066 1067 static void release_napi(struct ibmvnic_adapter *adapter) 1068 { 1069 int i; 1070 1071 if (!adapter->napi) 1072 return; 1073 1074 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1075 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1076 netif_napi_del(&adapter->napi[i]); 1077 } 1078 1079 kfree(adapter->napi); 1080 adapter->napi = NULL; 1081 adapter->num_active_rx_napi = 0; 1082 adapter->napi_enabled = false; 1083 } 1084 1085 static const char *adapter_state_to_string(enum vnic_state state) 1086 { 1087 switch (state) { 1088 case VNIC_PROBING: 1089 return "PROBING"; 1090 case VNIC_PROBED: 1091 return "PROBED"; 1092 case VNIC_OPENING: 1093 return "OPENING"; 1094 case VNIC_OPEN: 1095 return "OPEN"; 1096 case VNIC_CLOSING: 1097 return "CLOSING"; 1098 case VNIC_CLOSED: 1099 return "CLOSED"; 1100 case VNIC_REMOVING: 1101 return "REMOVING"; 1102 case VNIC_REMOVED: 1103 return "REMOVED"; 1104 case VNIC_DOWN: 1105 return "DOWN"; 1106 } 1107 return "UNKNOWN"; 1108 } 1109 1110 static int ibmvnic_login(struct net_device *netdev) 1111 { 1112 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1113 unsigned long timeout = msecs_to_jiffies(20000); 1114 int retry_count = 0; 1115 int retries = 10; 1116 bool retry; 1117 int rc; 1118 1119 do { 1120 retry = false; 1121 if (retry_count > retries) { 1122 netdev_warn(netdev, "Login attempts exceeded\n"); 1123 return -EACCES; 1124 } 1125 1126 adapter->init_done_rc = 0; 1127 reinit_completion(&adapter->init_done); 1128 rc = send_login(adapter); 1129 if (rc) 1130 return rc; 1131 1132 if (!wait_for_completion_timeout(&adapter->init_done, 1133 timeout)) { 1134 netdev_warn(netdev, "Login timed out, retrying...\n"); 1135 retry = true; 1136 adapter->init_done_rc = 0; 1137 retry_count++; 1138 continue; 1139 } 1140 1141 if (adapter->init_done_rc == ABORTED) { 1142 netdev_warn(netdev, "Login aborted, retrying...\n"); 1143 retry = true; 1144 adapter->init_done_rc = 0; 1145 retry_count++; 1146 /* FW or device may be busy, so 1147 * wait a bit before retrying login 1148 */ 1149 msleep(500); 1150 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1151 retry_count++; 1152 release_sub_crqs(adapter, 1); 1153 1154 retry = true; 1155 netdev_dbg(netdev, 1156 "Received partial success, retrying...\n"); 1157 adapter->init_done_rc = 0; 1158 reinit_completion(&adapter->init_done); 1159 send_query_cap(adapter); 1160 if (!wait_for_completion_timeout(&adapter->init_done, 1161 timeout)) { 1162 netdev_warn(netdev, 1163 "Capabilities query timed out\n"); 1164 return -ETIMEDOUT; 1165 } 1166 1167 rc = init_sub_crqs(adapter); 1168 if (rc) { 1169 netdev_warn(netdev, 1170 "SCRQ initialization failed\n"); 1171 return rc; 1172 } 1173 1174 rc = init_sub_crq_irqs(adapter); 1175 if (rc) { 1176 netdev_warn(netdev, 1177 "SCRQ irq initialization failed\n"); 1178 return rc; 1179 } 1180 } else if (adapter->init_done_rc) { 1181 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1182 adapter->init_done_rc); 1183 return -EIO; 1184 } 1185 } while (retry); 1186 1187 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1188 1189 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1190 return 0; 1191 } 1192 1193 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1194 { 1195 kfree(adapter->login_buf); 1196 adapter->login_buf = NULL; 1197 } 1198 1199 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1200 { 1201 kfree(adapter->login_rsp_buf); 1202 adapter->login_rsp_buf = NULL; 1203 } 1204 1205 static void release_resources(struct ibmvnic_adapter *adapter) 1206 { 1207 release_vpd_data(adapter); 1208 1209 release_napi(adapter); 1210 release_login_buffer(adapter); 1211 release_login_rsp_buffer(adapter); 1212 } 1213 1214 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1215 { 1216 struct net_device *netdev = adapter->netdev; 1217 unsigned long timeout = msecs_to_jiffies(20000); 1218 union ibmvnic_crq crq; 1219 bool resend; 1220 int rc; 1221 1222 netdev_dbg(netdev, "setting link state %d\n", link_state); 1223 1224 memset(&crq, 0, sizeof(crq)); 1225 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1226 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1227 crq.logical_link_state.link_state = link_state; 1228 1229 do { 1230 resend = false; 1231 1232 reinit_completion(&adapter->init_done); 1233 rc = ibmvnic_send_crq(adapter, &crq); 1234 if (rc) { 1235 netdev_err(netdev, "Failed to set link state\n"); 1236 return rc; 1237 } 1238 1239 if (!wait_for_completion_timeout(&adapter->init_done, 1240 timeout)) { 1241 netdev_err(netdev, "timeout setting link state\n"); 1242 return -ETIMEDOUT; 1243 } 1244 1245 if (adapter->init_done_rc == PARTIALSUCCESS) { 1246 /* Partuial success, delay and re-send */ 1247 mdelay(1000); 1248 resend = true; 1249 } else if (adapter->init_done_rc) { 1250 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1251 adapter->init_done_rc); 1252 return adapter->init_done_rc; 1253 } 1254 } while (resend); 1255 1256 return 0; 1257 } 1258 1259 static int set_real_num_queues(struct net_device *netdev) 1260 { 1261 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1262 int rc; 1263 1264 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1265 adapter->req_tx_queues, adapter->req_rx_queues); 1266 1267 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1268 if (rc) { 1269 netdev_err(netdev, "failed to set the number of tx queues\n"); 1270 return rc; 1271 } 1272 1273 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1274 if (rc) 1275 netdev_err(netdev, "failed to set the number of rx queues\n"); 1276 1277 return rc; 1278 } 1279 1280 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1281 { 1282 struct device *dev = &adapter->vdev->dev; 1283 union ibmvnic_crq crq; 1284 int len = 0; 1285 int rc; 1286 1287 if (adapter->vpd->buff) 1288 len = adapter->vpd->len; 1289 1290 mutex_lock(&adapter->fw_lock); 1291 adapter->fw_done_rc = 0; 1292 reinit_completion(&adapter->fw_done); 1293 1294 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1295 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1296 rc = ibmvnic_send_crq(adapter, &crq); 1297 if (rc) { 1298 mutex_unlock(&adapter->fw_lock); 1299 return rc; 1300 } 1301 1302 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1303 if (rc) { 1304 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1305 mutex_unlock(&adapter->fw_lock); 1306 return rc; 1307 } 1308 mutex_unlock(&adapter->fw_lock); 1309 1310 if (!adapter->vpd->len) 1311 return -ENODATA; 1312 1313 if (!adapter->vpd->buff) 1314 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1315 else if (adapter->vpd->len != len) 1316 adapter->vpd->buff = 1317 krealloc(adapter->vpd->buff, 1318 adapter->vpd->len, GFP_KERNEL); 1319 1320 if (!adapter->vpd->buff) { 1321 dev_err(dev, "Could allocate VPD buffer\n"); 1322 return -ENOMEM; 1323 } 1324 1325 adapter->vpd->dma_addr = 1326 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1327 DMA_FROM_DEVICE); 1328 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1329 dev_err(dev, "Could not map VPD buffer\n"); 1330 kfree(adapter->vpd->buff); 1331 adapter->vpd->buff = NULL; 1332 return -ENOMEM; 1333 } 1334 1335 mutex_lock(&adapter->fw_lock); 1336 adapter->fw_done_rc = 0; 1337 reinit_completion(&adapter->fw_done); 1338 1339 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1340 crq.get_vpd.cmd = GET_VPD; 1341 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1342 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1343 rc = ibmvnic_send_crq(adapter, &crq); 1344 if (rc) { 1345 kfree(adapter->vpd->buff); 1346 adapter->vpd->buff = NULL; 1347 mutex_unlock(&adapter->fw_lock); 1348 return rc; 1349 } 1350 1351 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1352 if (rc) { 1353 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1354 kfree(adapter->vpd->buff); 1355 adapter->vpd->buff = NULL; 1356 mutex_unlock(&adapter->fw_lock); 1357 return rc; 1358 } 1359 1360 mutex_unlock(&adapter->fw_lock); 1361 return 0; 1362 } 1363 1364 static int init_resources(struct ibmvnic_adapter *adapter) 1365 { 1366 struct net_device *netdev = adapter->netdev; 1367 int rc; 1368 1369 rc = set_real_num_queues(netdev); 1370 if (rc) 1371 return rc; 1372 1373 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1374 if (!adapter->vpd) 1375 return -ENOMEM; 1376 1377 /* Vital Product Data (VPD) */ 1378 rc = ibmvnic_get_vpd(adapter); 1379 if (rc) { 1380 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1381 return rc; 1382 } 1383 1384 rc = init_napi(adapter); 1385 if (rc) 1386 return rc; 1387 1388 send_query_map(adapter); 1389 1390 rc = init_rx_pools(netdev); 1391 if (rc) 1392 return rc; 1393 1394 rc = init_tx_pools(netdev); 1395 return rc; 1396 } 1397 1398 static int __ibmvnic_open(struct net_device *netdev) 1399 { 1400 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1401 enum vnic_state prev_state = adapter->state; 1402 int i, rc; 1403 1404 adapter->state = VNIC_OPENING; 1405 replenish_pools(adapter); 1406 ibmvnic_napi_enable(adapter); 1407 1408 /* We're ready to receive frames, enable the sub-crq interrupts and 1409 * set the logical link state to up 1410 */ 1411 for (i = 0; i < adapter->req_rx_queues; i++) { 1412 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1413 if (prev_state == VNIC_CLOSED) 1414 enable_irq(adapter->rx_scrq[i]->irq); 1415 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1416 } 1417 1418 for (i = 0; i < adapter->req_tx_queues; i++) { 1419 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1420 if (prev_state == VNIC_CLOSED) 1421 enable_irq(adapter->tx_scrq[i]->irq); 1422 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1423 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1424 } 1425 1426 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1427 if (rc) { 1428 ibmvnic_napi_disable(adapter); 1429 ibmvnic_disable_irqs(adapter); 1430 return rc; 1431 } 1432 1433 adapter->tx_queues_active = true; 1434 1435 /* Since queues were stopped until now, there shouldn't be any 1436 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1437 * don't need the synchronize_rcu()? Leaving it for consistency 1438 * with setting ->tx_queues_active = false. 1439 */ 1440 synchronize_rcu(); 1441 1442 netif_tx_start_all_queues(netdev); 1443 1444 if (prev_state == VNIC_CLOSED) { 1445 for (i = 0; i < adapter->req_rx_queues; i++) 1446 napi_schedule(&adapter->napi[i]); 1447 } 1448 1449 adapter->state = VNIC_OPEN; 1450 return rc; 1451 } 1452 1453 static int ibmvnic_open(struct net_device *netdev) 1454 { 1455 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1456 int rc; 1457 1458 ASSERT_RTNL(); 1459 1460 /* If device failover is pending or we are about to reset, just set 1461 * device state and return. Device operation will be handled by reset 1462 * routine. 1463 * 1464 * It should be safe to overwrite the adapter->state here. Since 1465 * we hold the rtnl, either the reset has not actually started or 1466 * the rtnl got dropped during the set_link_state() in do_reset(). 1467 * In the former case, no one else is changing the state (again we 1468 * have the rtnl) and in the latter case, do_reset() will detect and 1469 * honor our setting below. 1470 */ 1471 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1472 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1473 adapter_state_to_string(adapter->state), 1474 adapter->failover_pending); 1475 adapter->state = VNIC_OPEN; 1476 rc = 0; 1477 goto out; 1478 } 1479 1480 if (adapter->state != VNIC_CLOSED) { 1481 rc = ibmvnic_login(netdev); 1482 if (rc) 1483 goto out; 1484 1485 rc = init_resources(adapter); 1486 if (rc) { 1487 netdev_err(netdev, "failed to initialize resources\n"); 1488 goto out; 1489 } 1490 } 1491 1492 rc = __ibmvnic_open(netdev); 1493 1494 out: 1495 /* If open failed and there is a pending failover or in-progress reset, 1496 * set device state and return. Device operation will be handled by 1497 * reset routine. See also comments above regarding rtnl. 1498 */ 1499 if (rc && 1500 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1501 adapter->state = VNIC_OPEN; 1502 rc = 0; 1503 } 1504 1505 if (rc) { 1506 release_resources(adapter); 1507 release_rx_pools(adapter); 1508 release_tx_pools(adapter); 1509 } 1510 1511 return rc; 1512 } 1513 1514 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1515 { 1516 struct ibmvnic_rx_pool *rx_pool; 1517 struct ibmvnic_rx_buff *rx_buff; 1518 u64 rx_entries; 1519 int rx_scrqs; 1520 int i, j; 1521 1522 if (!adapter->rx_pool) 1523 return; 1524 1525 rx_scrqs = adapter->num_active_rx_pools; 1526 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1527 1528 /* Free any remaining skbs in the rx buffer pools */ 1529 for (i = 0; i < rx_scrqs; i++) { 1530 rx_pool = &adapter->rx_pool[i]; 1531 if (!rx_pool || !rx_pool->rx_buff) 1532 continue; 1533 1534 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1535 for (j = 0; j < rx_entries; j++) { 1536 rx_buff = &rx_pool->rx_buff[j]; 1537 if (rx_buff && rx_buff->skb) { 1538 dev_kfree_skb_any(rx_buff->skb); 1539 rx_buff->skb = NULL; 1540 } 1541 } 1542 } 1543 } 1544 1545 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1546 struct ibmvnic_tx_pool *tx_pool) 1547 { 1548 struct ibmvnic_tx_buff *tx_buff; 1549 u64 tx_entries; 1550 int i; 1551 1552 if (!tx_pool || !tx_pool->tx_buff) 1553 return; 1554 1555 tx_entries = tx_pool->num_buffers; 1556 1557 for (i = 0; i < tx_entries; i++) { 1558 tx_buff = &tx_pool->tx_buff[i]; 1559 if (tx_buff && tx_buff->skb) { 1560 dev_kfree_skb_any(tx_buff->skb); 1561 tx_buff->skb = NULL; 1562 } 1563 } 1564 } 1565 1566 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1567 { 1568 int tx_scrqs; 1569 int i; 1570 1571 if (!adapter->tx_pool || !adapter->tso_pool) 1572 return; 1573 1574 tx_scrqs = adapter->num_active_tx_pools; 1575 1576 /* Free any remaining skbs in the tx buffer pools */ 1577 for (i = 0; i < tx_scrqs; i++) { 1578 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1579 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1580 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1581 } 1582 } 1583 1584 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1585 { 1586 struct net_device *netdev = adapter->netdev; 1587 int i; 1588 1589 if (adapter->tx_scrq) { 1590 for (i = 0; i < adapter->req_tx_queues; i++) 1591 if (adapter->tx_scrq[i]->irq) { 1592 netdev_dbg(netdev, 1593 "Disabling tx_scrq[%d] irq\n", i); 1594 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1595 disable_irq(adapter->tx_scrq[i]->irq); 1596 } 1597 } 1598 1599 if (adapter->rx_scrq) { 1600 for (i = 0; i < adapter->req_rx_queues; i++) { 1601 if (adapter->rx_scrq[i]->irq) { 1602 netdev_dbg(netdev, 1603 "Disabling rx_scrq[%d] irq\n", i); 1604 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1605 disable_irq(adapter->rx_scrq[i]->irq); 1606 } 1607 } 1608 } 1609 } 1610 1611 static void ibmvnic_cleanup(struct net_device *netdev) 1612 { 1613 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1614 1615 /* ensure that transmissions are stopped if called by do_reset */ 1616 1617 adapter->tx_queues_active = false; 1618 1619 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 1620 * update so they don't restart a queue after we stop it below. 1621 */ 1622 synchronize_rcu(); 1623 1624 if (test_bit(0, &adapter->resetting)) 1625 netif_tx_disable(netdev); 1626 else 1627 netif_tx_stop_all_queues(netdev); 1628 1629 ibmvnic_napi_disable(adapter); 1630 ibmvnic_disable_irqs(adapter); 1631 } 1632 1633 static int __ibmvnic_close(struct net_device *netdev) 1634 { 1635 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1636 int rc = 0; 1637 1638 adapter->state = VNIC_CLOSING; 1639 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1640 adapter->state = VNIC_CLOSED; 1641 return rc; 1642 } 1643 1644 static int ibmvnic_close(struct net_device *netdev) 1645 { 1646 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1647 int rc; 1648 1649 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1650 adapter_state_to_string(adapter->state), 1651 adapter->failover_pending, 1652 adapter->force_reset_recovery); 1653 1654 /* If device failover is pending, just set device state and return. 1655 * Device operation will be handled by reset routine. 1656 */ 1657 if (adapter->failover_pending) { 1658 adapter->state = VNIC_CLOSED; 1659 return 0; 1660 } 1661 1662 rc = __ibmvnic_close(netdev); 1663 ibmvnic_cleanup(netdev); 1664 clean_rx_pools(adapter); 1665 clean_tx_pools(adapter); 1666 1667 return rc; 1668 } 1669 1670 /** 1671 * build_hdr_data - creates L2/L3/L4 header data buffer 1672 * @hdr_field: bitfield determining needed headers 1673 * @skb: socket buffer 1674 * @hdr_len: array of header lengths 1675 * @hdr_data: buffer to write the header to 1676 * 1677 * Reads hdr_field to determine which headers are needed by firmware. 1678 * Builds a buffer containing these headers. Saves individual header 1679 * lengths and total buffer length to be used to build descriptors. 1680 */ 1681 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1682 int *hdr_len, u8 *hdr_data) 1683 { 1684 int len = 0; 1685 u8 *hdr; 1686 1687 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1688 hdr_len[0] = sizeof(struct vlan_ethhdr); 1689 else 1690 hdr_len[0] = sizeof(struct ethhdr); 1691 1692 if (skb->protocol == htons(ETH_P_IP)) { 1693 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1694 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1695 hdr_len[2] = tcp_hdrlen(skb); 1696 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1697 hdr_len[2] = sizeof(struct udphdr); 1698 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1699 hdr_len[1] = sizeof(struct ipv6hdr); 1700 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1701 hdr_len[2] = tcp_hdrlen(skb); 1702 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1703 hdr_len[2] = sizeof(struct udphdr); 1704 } else if (skb->protocol == htons(ETH_P_ARP)) { 1705 hdr_len[1] = arp_hdr_len(skb->dev); 1706 hdr_len[2] = 0; 1707 } 1708 1709 memset(hdr_data, 0, 120); 1710 if ((hdr_field >> 6) & 1) { 1711 hdr = skb_mac_header(skb); 1712 memcpy(hdr_data, hdr, hdr_len[0]); 1713 len += hdr_len[0]; 1714 } 1715 1716 if ((hdr_field >> 5) & 1) { 1717 hdr = skb_network_header(skb); 1718 memcpy(hdr_data + len, hdr, hdr_len[1]); 1719 len += hdr_len[1]; 1720 } 1721 1722 if ((hdr_field >> 4) & 1) { 1723 hdr = skb_transport_header(skb); 1724 memcpy(hdr_data + len, hdr, hdr_len[2]); 1725 len += hdr_len[2]; 1726 } 1727 return len; 1728 } 1729 1730 /** 1731 * create_hdr_descs - create header and header extension descriptors 1732 * @hdr_field: bitfield determining needed headers 1733 * @hdr_data: buffer containing header data 1734 * @len: length of data buffer 1735 * @hdr_len: array of individual header lengths 1736 * @scrq_arr: descriptor array 1737 * 1738 * Creates header and, if needed, header extension descriptors and 1739 * places them in a descriptor array, scrq_arr 1740 */ 1741 1742 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1743 union sub_crq *scrq_arr) 1744 { 1745 union sub_crq hdr_desc; 1746 int tmp_len = len; 1747 int num_descs = 0; 1748 u8 *data, *cur; 1749 int tmp; 1750 1751 while (tmp_len > 0) { 1752 cur = hdr_data + len - tmp_len; 1753 1754 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1755 if (cur != hdr_data) { 1756 data = hdr_desc.hdr_ext.data; 1757 tmp = tmp_len > 29 ? 29 : tmp_len; 1758 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1759 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1760 hdr_desc.hdr_ext.len = tmp; 1761 } else { 1762 data = hdr_desc.hdr.data; 1763 tmp = tmp_len > 24 ? 24 : tmp_len; 1764 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1765 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1766 hdr_desc.hdr.len = tmp; 1767 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1768 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1769 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1770 hdr_desc.hdr.flag = hdr_field << 1; 1771 } 1772 memcpy(data, cur, tmp); 1773 tmp_len -= tmp; 1774 *scrq_arr = hdr_desc; 1775 scrq_arr++; 1776 num_descs++; 1777 } 1778 1779 return num_descs; 1780 } 1781 1782 /** 1783 * build_hdr_descs_arr - build a header descriptor array 1784 * @skb: tx socket buffer 1785 * @indir_arr: indirect array 1786 * @num_entries: number of descriptors to be sent 1787 * @hdr_field: bit field determining which headers will be sent 1788 * 1789 * This function will build a TX descriptor array with applicable 1790 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1791 */ 1792 1793 static void build_hdr_descs_arr(struct sk_buff *skb, 1794 union sub_crq *indir_arr, 1795 int *num_entries, u8 hdr_field) 1796 { 1797 int hdr_len[3] = {0, 0, 0}; 1798 u8 hdr_data[140] = {0}; 1799 int tot_len; 1800 1801 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1802 hdr_data); 1803 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1804 indir_arr + 1); 1805 } 1806 1807 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1808 struct net_device *netdev) 1809 { 1810 /* For some backing devices, mishandling of small packets 1811 * can result in a loss of connection or TX stall. Device 1812 * architects recommend that no packet should be smaller 1813 * than the minimum MTU value provided to the driver, so 1814 * pad any packets to that length 1815 */ 1816 if (skb->len < netdev->min_mtu) 1817 return skb_put_padto(skb, netdev->min_mtu); 1818 1819 return 0; 1820 } 1821 1822 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1823 struct ibmvnic_sub_crq_queue *tx_scrq) 1824 { 1825 struct ibmvnic_ind_xmit_queue *ind_bufp; 1826 struct ibmvnic_tx_buff *tx_buff; 1827 struct ibmvnic_tx_pool *tx_pool; 1828 union sub_crq tx_scrq_entry; 1829 int queue_num; 1830 int entries; 1831 int index; 1832 int i; 1833 1834 ind_bufp = &tx_scrq->ind_buf; 1835 entries = (u64)ind_bufp->index; 1836 queue_num = tx_scrq->pool_index; 1837 1838 for (i = entries - 1; i >= 0; --i) { 1839 tx_scrq_entry = ind_bufp->indir_arr[i]; 1840 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1841 continue; 1842 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1843 if (index & IBMVNIC_TSO_POOL_MASK) { 1844 tx_pool = &adapter->tso_pool[queue_num]; 1845 index &= ~IBMVNIC_TSO_POOL_MASK; 1846 } else { 1847 tx_pool = &adapter->tx_pool[queue_num]; 1848 } 1849 tx_pool->free_map[tx_pool->consumer_index] = index; 1850 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1851 tx_pool->num_buffers - 1 : 1852 tx_pool->consumer_index - 1; 1853 tx_buff = &tx_pool->tx_buff[index]; 1854 adapter->netdev->stats.tx_packets--; 1855 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1856 adapter->tx_stats_buffers[queue_num].packets--; 1857 adapter->tx_stats_buffers[queue_num].bytes -= 1858 tx_buff->skb->len; 1859 dev_kfree_skb_any(tx_buff->skb); 1860 tx_buff->skb = NULL; 1861 adapter->netdev->stats.tx_dropped++; 1862 } 1863 1864 ind_bufp->index = 0; 1865 1866 if (atomic_sub_return(entries, &tx_scrq->used) <= 1867 (adapter->req_tx_entries_per_subcrq / 2) && 1868 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1869 rcu_read_lock(); 1870 1871 if (adapter->tx_queues_active) { 1872 netif_wake_subqueue(adapter->netdev, queue_num); 1873 netdev_dbg(adapter->netdev, "Started queue %d\n", 1874 queue_num); 1875 } 1876 1877 rcu_read_unlock(); 1878 } 1879 } 1880 1881 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1882 struct ibmvnic_sub_crq_queue *tx_scrq) 1883 { 1884 struct ibmvnic_ind_xmit_queue *ind_bufp; 1885 u64 dma_addr; 1886 u64 entries; 1887 u64 handle; 1888 int rc; 1889 1890 ind_bufp = &tx_scrq->ind_buf; 1891 dma_addr = (u64)ind_bufp->indir_dma; 1892 entries = (u64)ind_bufp->index; 1893 handle = tx_scrq->handle; 1894 1895 if (!entries) 1896 return 0; 1897 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1898 if (rc) 1899 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1900 else 1901 ind_bufp->index = 0; 1902 return 0; 1903 } 1904 1905 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1906 { 1907 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1908 int queue_num = skb_get_queue_mapping(skb); 1909 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1910 struct device *dev = &adapter->vdev->dev; 1911 struct ibmvnic_ind_xmit_queue *ind_bufp; 1912 struct ibmvnic_tx_buff *tx_buff = NULL; 1913 struct ibmvnic_sub_crq_queue *tx_scrq; 1914 struct ibmvnic_tx_pool *tx_pool; 1915 unsigned int tx_send_failed = 0; 1916 netdev_tx_t ret = NETDEV_TX_OK; 1917 unsigned int tx_map_failed = 0; 1918 union sub_crq indir_arr[16]; 1919 unsigned int tx_dropped = 0; 1920 unsigned int tx_packets = 0; 1921 unsigned int tx_bytes = 0; 1922 dma_addr_t data_dma_addr; 1923 struct netdev_queue *txq; 1924 unsigned long lpar_rc; 1925 union sub_crq tx_crq; 1926 unsigned int offset; 1927 int num_entries = 1; 1928 unsigned char *dst; 1929 int bufidx = 0; 1930 u8 proto = 0; 1931 1932 /* If a reset is in progress, drop the packet since 1933 * the scrqs may get torn down. Otherwise use the 1934 * rcu to ensure reset waits for us to complete. 1935 */ 1936 rcu_read_lock(); 1937 if (!adapter->tx_queues_active) { 1938 dev_kfree_skb_any(skb); 1939 1940 tx_send_failed++; 1941 tx_dropped++; 1942 ret = NETDEV_TX_OK; 1943 goto out; 1944 } 1945 1946 tx_scrq = adapter->tx_scrq[queue_num]; 1947 txq = netdev_get_tx_queue(netdev, queue_num); 1948 ind_bufp = &tx_scrq->ind_buf; 1949 1950 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1951 tx_dropped++; 1952 tx_send_failed++; 1953 ret = NETDEV_TX_OK; 1954 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1955 goto out; 1956 } 1957 1958 if (skb_is_gso(skb)) 1959 tx_pool = &adapter->tso_pool[queue_num]; 1960 else 1961 tx_pool = &adapter->tx_pool[queue_num]; 1962 1963 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 1964 1965 if (bufidx == IBMVNIC_INVALID_MAP) { 1966 dev_kfree_skb_any(skb); 1967 tx_send_failed++; 1968 tx_dropped++; 1969 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1970 ret = NETDEV_TX_OK; 1971 goto out; 1972 } 1973 1974 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1975 1976 offset = bufidx * tx_pool->buf_size; 1977 dst = tx_pool->long_term_buff.buff + offset; 1978 memset(dst, 0, tx_pool->buf_size); 1979 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1980 1981 if (skb_shinfo(skb)->nr_frags) { 1982 int cur, i; 1983 1984 /* Copy the head */ 1985 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1986 cur = skb_headlen(skb); 1987 1988 /* Copy the frags */ 1989 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1990 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1991 1992 memcpy(dst + cur, skb_frag_address(frag), 1993 skb_frag_size(frag)); 1994 cur += skb_frag_size(frag); 1995 } 1996 } else { 1997 skb_copy_from_linear_data(skb, dst, skb->len); 1998 } 1999 2000 /* post changes to long_term_buff *dst before VIOS accessing it */ 2001 dma_wmb(); 2002 2003 tx_pool->consumer_index = 2004 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2005 2006 tx_buff = &tx_pool->tx_buff[bufidx]; 2007 tx_buff->skb = skb; 2008 tx_buff->index = bufidx; 2009 tx_buff->pool_index = queue_num; 2010 2011 memset(&tx_crq, 0, sizeof(tx_crq)); 2012 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2013 tx_crq.v1.type = IBMVNIC_TX_DESC; 2014 tx_crq.v1.n_crq_elem = 1; 2015 tx_crq.v1.n_sge = 1; 2016 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2017 2018 if (skb_is_gso(skb)) 2019 tx_crq.v1.correlator = 2020 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2021 else 2022 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2023 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 2024 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2025 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2026 2027 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2028 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2029 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2030 } 2031 2032 if (skb->protocol == htons(ETH_P_IP)) { 2033 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2034 proto = ip_hdr(skb)->protocol; 2035 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2036 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2037 proto = ipv6_hdr(skb)->nexthdr; 2038 } 2039 2040 if (proto == IPPROTO_TCP) 2041 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2042 else if (proto == IPPROTO_UDP) 2043 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2044 2045 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2046 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2047 hdrs += 2; 2048 } 2049 if (skb_is_gso(skb)) { 2050 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2051 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2052 hdrs += 2; 2053 } 2054 2055 if ((*hdrs >> 7) & 1) 2056 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2057 2058 tx_crq.v1.n_crq_elem = num_entries; 2059 tx_buff->num_entries = num_entries; 2060 /* flush buffer if current entry can not fit */ 2061 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2062 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2063 if (lpar_rc != H_SUCCESS) 2064 goto tx_flush_err; 2065 } 2066 2067 indir_arr[0] = tx_crq; 2068 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2069 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2070 ind_bufp->index += num_entries; 2071 if (__netdev_tx_sent_queue(txq, skb->len, 2072 netdev_xmit_more() && 2073 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2074 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2075 if (lpar_rc != H_SUCCESS) 2076 goto tx_err; 2077 } 2078 2079 if (atomic_add_return(num_entries, &tx_scrq->used) 2080 >= adapter->req_tx_entries_per_subcrq) { 2081 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2082 netif_stop_subqueue(netdev, queue_num); 2083 } 2084 2085 tx_packets++; 2086 tx_bytes += skb->len; 2087 txq_trans_cond_update(txq); 2088 ret = NETDEV_TX_OK; 2089 goto out; 2090 2091 tx_flush_err: 2092 dev_kfree_skb_any(skb); 2093 tx_buff->skb = NULL; 2094 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2095 tx_pool->num_buffers - 1 : 2096 tx_pool->consumer_index - 1; 2097 tx_dropped++; 2098 tx_err: 2099 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2100 dev_err_ratelimited(dev, "tx: send failed\n"); 2101 2102 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2103 /* Disable TX and report carrier off if queue is closed 2104 * or pending failover. 2105 * Firmware guarantees that a signal will be sent to the 2106 * driver, triggering a reset or some other action. 2107 */ 2108 netif_tx_stop_all_queues(netdev); 2109 netif_carrier_off(netdev); 2110 } 2111 out: 2112 rcu_read_unlock(); 2113 netdev->stats.tx_dropped += tx_dropped; 2114 netdev->stats.tx_bytes += tx_bytes; 2115 netdev->stats.tx_packets += tx_packets; 2116 adapter->tx_send_failed += tx_send_failed; 2117 adapter->tx_map_failed += tx_map_failed; 2118 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2119 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2120 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2121 2122 return ret; 2123 } 2124 2125 static void ibmvnic_set_multi(struct net_device *netdev) 2126 { 2127 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2128 struct netdev_hw_addr *ha; 2129 union ibmvnic_crq crq; 2130 2131 memset(&crq, 0, sizeof(crq)); 2132 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2133 crq.request_capability.cmd = REQUEST_CAPABILITY; 2134 2135 if (netdev->flags & IFF_PROMISC) { 2136 if (!adapter->promisc_supported) 2137 return; 2138 } else { 2139 if (netdev->flags & IFF_ALLMULTI) { 2140 /* Accept all multicast */ 2141 memset(&crq, 0, sizeof(crq)); 2142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2143 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2144 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2145 ibmvnic_send_crq(adapter, &crq); 2146 } else if (netdev_mc_empty(netdev)) { 2147 /* Reject all multicast */ 2148 memset(&crq, 0, sizeof(crq)); 2149 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2150 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2151 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2152 ibmvnic_send_crq(adapter, &crq); 2153 } else { 2154 /* Accept one or more multicast(s) */ 2155 netdev_for_each_mc_addr(ha, netdev) { 2156 memset(&crq, 0, sizeof(crq)); 2157 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2158 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2159 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2160 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2161 ha->addr); 2162 ibmvnic_send_crq(adapter, &crq); 2163 } 2164 } 2165 } 2166 } 2167 2168 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2169 { 2170 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2171 union ibmvnic_crq crq; 2172 int rc; 2173 2174 if (!is_valid_ether_addr(dev_addr)) { 2175 rc = -EADDRNOTAVAIL; 2176 goto err; 2177 } 2178 2179 memset(&crq, 0, sizeof(crq)); 2180 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2181 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2182 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2183 2184 mutex_lock(&adapter->fw_lock); 2185 adapter->fw_done_rc = 0; 2186 reinit_completion(&adapter->fw_done); 2187 2188 rc = ibmvnic_send_crq(adapter, &crq); 2189 if (rc) { 2190 rc = -EIO; 2191 mutex_unlock(&adapter->fw_lock); 2192 goto err; 2193 } 2194 2195 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2196 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2197 if (rc || adapter->fw_done_rc) { 2198 rc = -EIO; 2199 mutex_unlock(&adapter->fw_lock); 2200 goto err; 2201 } 2202 mutex_unlock(&adapter->fw_lock); 2203 return 0; 2204 err: 2205 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2206 return rc; 2207 } 2208 2209 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2210 { 2211 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2212 struct sockaddr *addr = p; 2213 int rc; 2214 2215 rc = 0; 2216 if (!is_valid_ether_addr(addr->sa_data)) 2217 return -EADDRNOTAVAIL; 2218 2219 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2220 if (adapter->state != VNIC_PROBED) 2221 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2222 2223 return rc; 2224 } 2225 2226 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2227 { 2228 switch (reason) { 2229 case VNIC_RESET_FAILOVER: 2230 return "FAILOVER"; 2231 case VNIC_RESET_MOBILITY: 2232 return "MOBILITY"; 2233 case VNIC_RESET_FATAL: 2234 return "FATAL"; 2235 case VNIC_RESET_NON_FATAL: 2236 return "NON_FATAL"; 2237 case VNIC_RESET_TIMEOUT: 2238 return "TIMEOUT"; 2239 case VNIC_RESET_CHANGE_PARAM: 2240 return "CHANGE_PARAM"; 2241 case VNIC_RESET_PASSIVE_INIT: 2242 return "PASSIVE_INIT"; 2243 } 2244 return "UNKNOWN"; 2245 } 2246 2247 /* 2248 * Initialize the init_done completion and return code values. We 2249 * can get a transport event just after registering the CRQ and the 2250 * tasklet will use this to communicate the transport event. To ensure 2251 * we don't miss the notification/error, initialize these _before_ 2252 * regisering the CRQ. 2253 */ 2254 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2255 { 2256 reinit_completion(&adapter->init_done); 2257 adapter->init_done_rc = 0; 2258 } 2259 2260 /* 2261 * do_reset returns zero if we are able to keep processing reset events, or 2262 * non-zero if we hit a fatal error and must halt. 2263 */ 2264 static int do_reset(struct ibmvnic_adapter *adapter, 2265 struct ibmvnic_rwi *rwi, u32 reset_state) 2266 { 2267 struct net_device *netdev = adapter->netdev; 2268 u64 old_num_rx_queues, old_num_tx_queues; 2269 u64 old_num_rx_slots, old_num_tx_slots; 2270 int rc; 2271 2272 netdev_dbg(adapter->netdev, 2273 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2274 adapter_state_to_string(adapter->state), 2275 adapter->failover_pending, 2276 reset_reason_to_string(rwi->reset_reason), 2277 adapter_state_to_string(reset_state)); 2278 2279 adapter->reset_reason = rwi->reset_reason; 2280 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2281 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2282 rtnl_lock(); 2283 2284 /* Now that we have the rtnl lock, clear any pending failover. 2285 * This will ensure ibmvnic_open() has either completed or will 2286 * block until failover is complete. 2287 */ 2288 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2289 adapter->failover_pending = false; 2290 2291 /* read the state and check (again) after getting rtnl */ 2292 reset_state = adapter->state; 2293 2294 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2295 rc = -EBUSY; 2296 goto out; 2297 } 2298 2299 netif_carrier_off(netdev); 2300 2301 old_num_rx_queues = adapter->req_rx_queues; 2302 old_num_tx_queues = adapter->req_tx_queues; 2303 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2304 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2305 2306 ibmvnic_cleanup(netdev); 2307 2308 if (reset_state == VNIC_OPEN && 2309 adapter->reset_reason != VNIC_RESET_MOBILITY && 2310 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2311 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2312 rc = __ibmvnic_close(netdev); 2313 if (rc) 2314 goto out; 2315 } else { 2316 adapter->state = VNIC_CLOSING; 2317 2318 /* Release the RTNL lock before link state change and 2319 * re-acquire after the link state change to allow 2320 * linkwatch_event to grab the RTNL lock and run during 2321 * a reset. 2322 */ 2323 rtnl_unlock(); 2324 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2325 rtnl_lock(); 2326 if (rc) 2327 goto out; 2328 2329 if (adapter->state == VNIC_OPEN) { 2330 /* When we dropped rtnl, ibmvnic_open() got 2331 * it and noticed that we are resetting and 2332 * set the adapter state to OPEN. Update our 2333 * new "target" state, and resume the reset 2334 * from VNIC_CLOSING state. 2335 */ 2336 netdev_dbg(netdev, 2337 "Open changed state from %s, updating.\n", 2338 adapter_state_to_string(reset_state)); 2339 reset_state = VNIC_OPEN; 2340 adapter->state = VNIC_CLOSING; 2341 } 2342 2343 if (adapter->state != VNIC_CLOSING) { 2344 /* If someone else changed the adapter state 2345 * when we dropped the rtnl, fail the reset 2346 */ 2347 rc = -EAGAIN; 2348 goto out; 2349 } 2350 adapter->state = VNIC_CLOSED; 2351 } 2352 } 2353 2354 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2355 release_resources(adapter); 2356 release_sub_crqs(adapter, 1); 2357 release_crq_queue(adapter); 2358 } 2359 2360 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2361 /* remove the closed state so when we call open it appears 2362 * we are coming from the probed state. 2363 */ 2364 adapter->state = VNIC_PROBED; 2365 2366 reinit_init_done(adapter); 2367 2368 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2369 rc = init_crq_queue(adapter); 2370 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2371 rc = ibmvnic_reenable_crq_queue(adapter); 2372 release_sub_crqs(adapter, 1); 2373 } else { 2374 rc = ibmvnic_reset_crq(adapter); 2375 if (rc == H_CLOSED || rc == H_SUCCESS) { 2376 rc = vio_enable_interrupts(adapter->vdev); 2377 if (rc) 2378 netdev_err(adapter->netdev, 2379 "Reset failed to enable interrupts. rc=%d\n", 2380 rc); 2381 } 2382 } 2383 2384 if (rc) { 2385 netdev_err(adapter->netdev, 2386 "Reset couldn't initialize crq. rc=%d\n", rc); 2387 goto out; 2388 } 2389 2390 rc = ibmvnic_reset_init(adapter, true); 2391 if (rc) 2392 goto out; 2393 2394 /* If the adapter was in PROBE or DOWN state prior to the reset, 2395 * exit here. 2396 */ 2397 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2398 rc = 0; 2399 goto out; 2400 } 2401 2402 rc = ibmvnic_login(netdev); 2403 if (rc) 2404 goto out; 2405 2406 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2407 rc = init_resources(adapter); 2408 if (rc) 2409 goto out; 2410 } else if (adapter->req_rx_queues != old_num_rx_queues || 2411 adapter->req_tx_queues != old_num_tx_queues || 2412 adapter->req_rx_add_entries_per_subcrq != 2413 old_num_rx_slots || 2414 adapter->req_tx_entries_per_subcrq != 2415 old_num_tx_slots || 2416 !adapter->rx_pool || 2417 !adapter->tso_pool || 2418 !adapter->tx_pool) { 2419 release_napi(adapter); 2420 release_vpd_data(adapter); 2421 2422 rc = init_resources(adapter); 2423 if (rc) 2424 goto out; 2425 2426 } else { 2427 rc = init_tx_pools(netdev); 2428 if (rc) { 2429 netdev_dbg(netdev, 2430 "init tx pools failed (%d)\n", 2431 rc); 2432 goto out; 2433 } 2434 2435 rc = init_rx_pools(netdev); 2436 if (rc) { 2437 netdev_dbg(netdev, 2438 "init rx pools failed (%d)\n", 2439 rc); 2440 goto out; 2441 } 2442 } 2443 ibmvnic_disable_irqs(adapter); 2444 } 2445 adapter->state = VNIC_CLOSED; 2446 2447 if (reset_state == VNIC_CLOSED) { 2448 rc = 0; 2449 goto out; 2450 } 2451 2452 rc = __ibmvnic_open(netdev); 2453 if (rc) { 2454 rc = IBMVNIC_OPEN_FAILED; 2455 goto out; 2456 } 2457 2458 /* refresh device's multicast list */ 2459 ibmvnic_set_multi(netdev); 2460 2461 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2462 adapter->reset_reason == VNIC_RESET_MOBILITY) 2463 __netdev_notify_peers(netdev); 2464 2465 rc = 0; 2466 2467 out: 2468 /* restore the adapter state if reset failed */ 2469 if (rc) 2470 adapter->state = reset_state; 2471 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2472 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2473 rtnl_unlock(); 2474 2475 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2476 adapter_state_to_string(adapter->state), 2477 adapter->failover_pending, rc); 2478 return rc; 2479 } 2480 2481 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2482 struct ibmvnic_rwi *rwi, u32 reset_state) 2483 { 2484 struct net_device *netdev = adapter->netdev; 2485 int rc; 2486 2487 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2488 reset_reason_to_string(rwi->reset_reason)); 2489 2490 /* read the state and check (again) after getting rtnl */ 2491 reset_state = adapter->state; 2492 2493 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2494 rc = -EBUSY; 2495 goto out; 2496 } 2497 2498 netif_carrier_off(netdev); 2499 adapter->reset_reason = rwi->reset_reason; 2500 2501 ibmvnic_cleanup(netdev); 2502 release_resources(adapter); 2503 release_sub_crqs(adapter, 0); 2504 release_crq_queue(adapter); 2505 2506 /* remove the closed state so when we call open it appears 2507 * we are coming from the probed state. 2508 */ 2509 adapter->state = VNIC_PROBED; 2510 2511 reinit_init_done(adapter); 2512 2513 rc = init_crq_queue(adapter); 2514 if (rc) { 2515 netdev_err(adapter->netdev, 2516 "Couldn't initialize crq. rc=%d\n", rc); 2517 goto out; 2518 } 2519 2520 rc = ibmvnic_reset_init(adapter, false); 2521 if (rc) 2522 goto out; 2523 2524 /* If the adapter was in PROBE or DOWN state prior to the reset, 2525 * exit here. 2526 */ 2527 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2528 goto out; 2529 2530 rc = ibmvnic_login(netdev); 2531 if (rc) 2532 goto out; 2533 2534 rc = init_resources(adapter); 2535 if (rc) 2536 goto out; 2537 2538 ibmvnic_disable_irqs(adapter); 2539 adapter->state = VNIC_CLOSED; 2540 2541 if (reset_state == VNIC_CLOSED) 2542 goto out; 2543 2544 rc = __ibmvnic_open(netdev); 2545 if (rc) { 2546 rc = IBMVNIC_OPEN_FAILED; 2547 goto out; 2548 } 2549 2550 __netdev_notify_peers(netdev); 2551 out: 2552 /* restore adapter state if reset failed */ 2553 if (rc) 2554 adapter->state = reset_state; 2555 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2556 adapter_state_to_string(adapter->state), 2557 adapter->failover_pending, rc); 2558 return rc; 2559 } 2560 2561 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2562 { 2563 struct ibmvnic_rwi *rwi; 2564 unsigned long flags; 2565 2566 spin_lock_irqsave(&adapter->rwi_lock, flags); 2567 2568 if (!list_empty(&adapter->rwi_list)) { 2569 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2570 list); 2571 list_del(&rwi->list); 2572 } else { 2573 rwi = NULL; 2574 } 2575 2576 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2577 return rwi; 2578 } 2579 2580 /** 2581 * do_passive_init - complete probing when partner device is detected. 2582 * @adapter: ibmvnic_adapter struct 2583 * 2584 * If the ibmvnic device does not have a partner device to communicate with at boot 2585 * and that partner device comes online at a later time, this function is called 2586 * to complete the initialization process of ibmvnic device. 2587 * Caller is expected to hold rtnl_lock(). 2588 * 2589 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2590 * in the down state. 2591 * Returns 0 upon success and the device is in PROBED state. 2592 */ 2593 2594 static int do_passive_init(struct ibmvnic_adapter *adapter) 2595 { 2596 unsigned long timeout = msecs_to_jiffies(30000); 2597 struct net_device *netdev = adapter->netdev; 2598 struct device *dev = &adapter->vdev->dev; 2599 int rc; 2600 2601 netdev_dbg(netdev, "Partner device found, probing.\n"); 2602 2603 adapter->state = VNIC_PROBING; 2604 reinit_completion(&adapter->init_done); 2605 adapter->init_done_rc = 0; 2606 adapter->crq.active = true; 2607 2608 rc = send_crq_init_complete(adapter); 2609 if (rc) 2610 goto out; 2611 2612 rc = send_version_xchg(adapter); 2613 if (rc) 2614 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2615 2616 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2617 dev_err(dev, "Initialization sequence timed out\n"); 2618 rc = -ETIMEDOUT; 2619 goto out; 2620 } 2621 2622 rc = init_sub_crqs(adapter); 2623 if (rc) { 2624 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2625 goto out; 2626 } 2627 2628 rc = init_sub_crq_irqs(adapter); 2629 if (rc) { 2630 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2631 goto init_failed; 2632 } 2633 2634 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2635 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2636 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2637 2638 adapter->state = VNIC_PROBED; 2639 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2640 2641 return 0; 2642 2643 init_failed: 2644 release_sub_crqs(adapter, 1); 2645 out: 2646 adapter->state = VNIC_DOWN; 2647 return rc; 2648 } 2649 2650 static void __ibmvnic_reset(struct work_struct *work) 2651 { 2652 struct ibmvnic_adapter *adapter; 2653 unsigned int timeout = 5000; 2654 struct ibmvnic_rwi *tmprwi; 2655 bool saved_state = false; 2656 struct ibmvnic_rwi *rwi; 2657 unsigned long flags; 2658 struct device *dev; 2659 bool need_reset; 2660 int num_fails = 0; 2661 u32 reset_state; 2662 int rc = 0; 2663 2664 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2665 dev = &adapter->vdev->dev; 2666 2667 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 2668 * or if another reset is in progress, defer work for now. If probe 2669 * eventually fails it will flush and terminate our work. 2670 * 2671 * Three possibilities here: 2672 * 1. Adpater being removed - just return 2673 * 2. Timed out on probe or another reset in progress - delay the work 2674 * 3. Completed probe - perform any resets in queue 2675 */ 2676 if (adapter->state == VNIC_PROBING && 2677 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 2678 dev_err(dev, "Reset thread timed out on probe"); 2679 queue_delayed_work(system_long_wq, 2680 &adapter->ibmvnic_delayed_reset, 2681 IBMVNIC_RESET_DELAY); 2682 return; 2683 } 2684 2685 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 2686 if (adapter->state == VNIC_REMOVING) 2687 return; 2688 2689 /* ->rwi_list is stable now (no one else is removing entries) */ 2690 2691 /* ibmvnic_probe() may have purged the reset queue after we were 2692 * scheduled to process a reset so there maybe no resets to process. 2693 * Before setting the ->resetting bit though, we have to make sure 2694 * that there is infact a reset to process. Otherwise we may race 2695 * with ibmvnic_open() and end up leaving the vnic down: 2696 * 2697 * __ibmvnic_reset() ibmvnic_open() 2698 * ----------------- -------------- 2699 * 2700 * set ->resetting bit 2701 * find ->resetting bit is set 2702 * set ->state to IBMVNIC_OPEN (i.e 2703 * assume reset will open device) 2704 * return 2705 * find reset queue empty 2706 * return 2707 * 2708 * Neither performed vnic login/open and vnic stays down 2709 * 2710 * If we hold the lock and conditionally set the bit, either we 2711 * or ibmvnic_open() will complete the open. 2712 */ 2713 need_reset = false; 2714 spin_lock(&adapter->rwi_lock); 2715 if (!list_empty(&adapter->rwi_list)) { 2716 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2717 queue_delayed_work(system_long_wq, 2718 &adapter->ibmvnic_delayed_reset, 2719 IBMVNIC_RESET_DELAY); 2720 } else { 2721 need_reset = true; 2722 } 2723 } 2724 spin_unlock(&adapter->rwi_lock); 2725 2726 if (!need_reset) 2727 return; 2728 2729 rwi = get_next_rwi(adapter); 2730 while (rwi) { 2731 spin_lock_irqsave(&adapter->state_lock, flags); 2732 2733 if (adapter->state == VNIC_REMOVING || 2734 adapter->state == VNIC_REMOVED) { 2735 spin_unlock_irqrestore(&adapter->state_lock, flags); 2736 kfree(rwi); 2737 rc = EBUSY; 2738 break; 2739 } 2740 2741 if (!saved_state) { 2742 reset_state = adapter->state; 2743 saved_state = true; 2744 } 2745 spin_unlock_irqrestore(&adapter->state_lock, flags); 2746 2747 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2748 rtnl_lock(); 2749 rc = do_passive_init(adapter); 2750 rtnl_unlock(); 2751 if (!rc) 2752 netif_carrier_on(adapter->netdev); 2753 } else if (adapter->force_reset_recovery) { 2754 /* Since we are doing a hard reset now, clear the 2755 * failover_pending flag so we don't ignore any 2756 * future MOBILITY or other resets. 2757 */ 2758 adapter->failover_pending = false; 2759 2760 /* Transport event occurred during previous reset */ 2761 if (adapter->wait_for_reset) { 2762 /* Previous was CHANGE_PARAM; caller locked */ 2763 adapter->force_reset_recovery = false; 2764 rc = do_hard_reset(adapter, rwi, reset_state); 2765 } else { 2766 rtnl_lock(); 2767 adapter->force_reset_recovery = false; 2768 rc = do_hard_reset(adapter, rwi, reset_state); 2769 rtnl_unlock(); 2770 } 2771 if (rc) 2772 num_fails++; 2773 else 2774 num_fails = 0; 2775 2776 /* If auto-priority-failover is enabled we can get 2777 * back to back failovers during resets, resulting 2778 * in at least two failed resets (from high-priority 2779 * backing device to low-priority one and then back) 2780 * If resets continue to fail beyond that, give the 2781 * adapter some time to settle down before retrying. 2782 */ 2783 if (num_fails >= 3) { 2784 netdev_dbg(adapter->netdev, 2785 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 2786 adapter_state_to_string(adapter->state), 2787 num_fails); 2788 set_current_state(TASK_UNINTERRUPTIBLE); 2789 schedule_timeout(60 * HZ); 2790 } 2791 } else { 2792 rc = do_reset(adapter, rwi, reset_state); 2793 } 2794 tmprwi = rwi; 2795 adapter->last_reset_time = jiffies; 2796 2797 if (rc) 2798 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2799 2800 rwi = get_next_rwi(adapter); 2801 2802 /* 2803 * If there is another reset queued, free the previous rwi 2804 * and process the new reset even if previous reset failed 2805 * (the previous reset could have failed because of a fail 2806 * over for instance, so process the fail over). 2807 * 2808 * If there are no resets queued and the previous reset failed, 2809 * the adapter would be in an undefined state. So retry the 2810 * previous reset as a hard reset. 2811 */ 2812 if (rwi) 2813 kfree(tmprwi); 2814 else if (rc) 2815 rwi = tmprwi; 2816 2817 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2818 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2819 adapter->force_reset_recovery = true; 2820 } 2821 2822 if (adapter->wait_for_reset) { 2823 adapter->reset_done_rc = rc; 2824 complete(&adapter->reset_done); 2825 } 2826 2827 clear_bit_unlock(0, &adapter->resetting); 2828 2829 netdev_dbg(adapter->netdev, 2830 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2831 adapter_state_to_string(adapter->state), 2832 adapter->force_reset_recovery, 2833 adapter->wait_for_reset); 2834 } 2835 2836 static void __ibmvnic_delayed_reset(struct work_struct *work) 2837 { 2838 struct ibmvnic_adapter *adapter; 2839 2840 adapter = container_of(work, struct ibmvnic_adapter, 2841 ibmvnic_delayed_reset.work); 2842 __ibmvnic_reset(&adapter->ibmvnic_reset); 2843 } 2844 2845 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 2846 { 2847 struct list_head *entry, *tmp_entry; 2848 2849 if (!list_empty(&adapter->rwi_list)) { 2850 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 2851 list_del(entry); 2852 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 2853 } 2854 } 2855 } 2856 2857 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2858 enum ibmvnic_reset_reason reason) 2859 { 2860 struct net_device *netdev = adapter->netdev; 2861 struct ibmvnic_rwi *rwi, *tmp; 2862 unsigned long flags; 2863 int ret; 2864 2865 spin_lock_irqsave(&adapter->rwi_lock, flags); 2866 2867 /* If failover is pending don't schedule any other reset. 2868 * Instead let the failover complete. If there is already a 2869 * a failover reset scheduled, we will detect and drop the 2870 * duplicate reset when walking the ->rwi_list below. 2871 */ 2872 if (adapter->state == VNIC_REMOVING || 2873 adapter->state == VNIC_REMOVED || 2874 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2875 ret = EBUSY; 2876 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2877 goto err; 2878 } 2879 2880 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2881 if (tmp->reset_reason == reason) { 2882 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2883 reset_reason_to_string(reason)); 2884 ret = EBUSY; 2885 goto err; 2886 } 2887 } 2888 2889 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2890 if (!rwi) { 2891 ret = ENOMEM; 2892 goto err; 2893 } 2894 /* if we just received a transport event, 2895 * flush reset queue and process this reset 2896 */ 2897 if (adapter->force_reset_recovery) 2898 flush_reset_queue(adapter); 2899 2900 rwi->reset_reason = reason; 2901 list_add_tail(&rwi->list, &adapter->rwi_list); 2902 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2903 reset_reason_to_string(reason)); 2904 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2905 2906 ret = 0; 2907 err: 2908 /* ibmvnic_close() below can block, so drop the lock first */ 2909 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2910 2911 if (ret == ENOMEM) 2912 ibmvnic_close(netdev); 2913 2914 return -ret; 2915 } 2916 2917 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2918 { 2919 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2920 2921 if (test_bit(0, &adapter->resetting)) { 2922 netdev_err(adapter->netdev, 2923 "Adapter is resetting, skip timeout reset\n"); 2924 return; 2925 } 2926 /* No queuing up reset until at least 5 seconds (default watchdog val) 2927 * after last reset 2928 */ 2929 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2930 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2931 return; 2932 } 2933 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2934 } 2935 2936 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2937 struct ibmvnic_rx_buff *rx_buff) 2938 { 2939 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2940 2941 rx_buff->skb = NULL; 2942 2943 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2944 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2945 2946 atomic_dec(&pool->available); 2947 } 2948 2949 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2950 { 2951 struct ibmvnic_sub_crq_queue *rx_scrq; 2952 struct ibmvnic_adapter *adapter; 2953 struct net_device *netdev; 2954 int frames_processed; 2955 int scrq_num; 2956 2957 netdev = napi->dev; 2958 adapter = netdev_priv(netdev); 2959 scrq_num = (int)(napi - adapter->napi); 2960 frames_processed = 0; 2961 rx_scrq = adapter->rx_scrq[scrq_num]; 2962 2963 restart_poll: 2964 while (frames_processed < budget) { 2965 struct sk_buff *skb; 2966 struct ibmvnic_rx_buff *rx_buff; 2967 union sub_crq *next; 2968 u32 length; 2969 u16 offset; 2970 u8 flags = 0; 2971 2972 if (unlikely(test_bit(0, &adapter->resetting) && 2973 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2974 enable_scrq_irq(adapter, rx_scrq); 2975 napi_complete_done(napi, frames_processed); 2976 return frames_processed; 2977 } 2978 2979 if (!pending_scrq(adapter, rx_scrq)) 2980 break; 2981 next = ibmvnic_next_scrq(adapter, rx_scrq); 2982 rx_buff = (struct ibmvnic_rx_buff *) 2983 be64_to_cpu(next->rx_comp.correlator); 2984 /* do error checking */ 2985 if (next->rx_comp.rc) { 2986 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2987 be16_to_cpu(next->rx_comp.rc)); 2988 /* free the entry */ 2989 next->rx_comp.first = 0; 2990 dev_kfree_skb_any(rx_buff->skb); 2991 remove_buff_from_pool(adapter, rx_buff); 2992 continue; 2993 } else if (!rx_buff->skb) { 2994 /* free the entry */ 2995 next->rx_comp.first = 0; 2996 remove_buff_from_pool(adapter, rx_buff); 2997 continue; 2998 } 2999 3000 length = be32_to_cpu(next->rx_comp.len); 3001 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3002 flags = next->rx_comp.flags; 3003 skb = rx_buff->skb; 3004 /* load long_term_buff before copying to skb */ 3005 dma_rmb(); 3006 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3007 length); 3008 3009 /* VLAN Header has been stripped by the system firmware and 3010 * needs to be inserted by the driver 3011 */ 3012 if (adapter->rx_vlan_header_insertion && 3013 (flags & IBMVNIC_VLAN_STRIPPED)) 3014 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3015 ntohs(next->rx_comp.vlan_tci)); 3016 3017 /* free the entry */ 3018 next->rx_comp.first = 0; 3019 remove_buff_from_pool(adapter, rx_buff); 3020 3021 skb_put(skb, length); 3022 skb->protocol = eth_type_trans(skb, netdev); 3023 skb_record_rx_queue(skb, scrq_num); 3024 3025 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3026 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3027 skb->ip_summed = CHECKSUM_UNNECESSARY; 3028 } 3029 3030 length = skb->len; 3031 napi_gro_receive(napi, skb); /* send it up */ 3032 netdev->stats.rx_packets++; 3033 netdev->stats.rx_bytes += length; 3034 adapter->rx_stats_buffers[scrq_num].packets++; 3035 adapter->rx_stats_buffers[scrq_num].bytes += length; 3036 frames_processed++; 3037 } 3038 3039 if (adapter->state != VNIC_CLOSING && 3040 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 3041 adapter->req_rx_add_entries_per_subcrq / 2) || 3042 frames_processed < budget)) 3043 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3044 if (frames_processed < budget) { 3045 if (napi_complete_done(napi, frames_processed)) { 3046 enable_scrq_irq(adapter, rx_scrq); 3047 if (pending_scrq(adapter, rx_scrq)) { 3048 if (napi_reschedule(napi)) { 3049 disable_scrq_irq(adapter, rx_scrq); 3050 goto restart_poll; 3051 } 3052 } 3053 } 3054 } 3055 return frames_processed; 3056 } 3057 3058 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3059 { 3060 int rc, ret; 3061 3062 adapter->fallback.mtu = adapter->req_mtu; 3063 adapter->fallback.rx_queues = adapter->req_rx_queues; 3064 adapter->fallback.tx_queues = adapter->req_tx_queues; 3065 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3066 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3067 3068 reinit_completion(&adapter->reset_done); 3069 adapter->wait_for_reset = true; 3070 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3071 3072 if (rc) { 3073 ret = rc; 3074 goto out; 3075 } 3076 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3077 if (rc) { 3078 ret = -ENODEV; 3079 goto out; 3080 } 3081 3082 ret = 0; 3083 if (adapter->reset_done_rc) { 3084 ret = -EIO; 3085 adapter->desired.mtu = adapter->fallback.mtu; 3086 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3087 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3088 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3089 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3090 3091 reinit_completion(&adapter->reset_done); 3092 adapter->wait_for_reset = true; 3093 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3094 if (rc) { 3095 ret = rc; 3096 goto out; 3097 } 3098 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3099 60000); 3100 if (rc) { 3101 ret = -ENODEV; 3102 goto out; 3103 } 3104 } 3105 out: 3106 adapter->wait_for_reset = false; 3107 3108 return ret; 3109 } 3110 3111 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3112 { 3113 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3114 3115 adapter->desired.mtu = new_mtu + ETH_HLEN; 3116 3117 return wait_for_reset(adapter); 3118 } 3119 3120 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3121 struct net_device *dev, 3122 netdev_features_t features) 3123 { 3124 /* Some backing hardware adapters can not 3125 * handle packets with a MSS less than 224 3126 * or with only one segment. 3127 */ 3128 if (skb_is_gso(skb)) { 3129 if (skb_shinfo(skb)->gso_size < 224 || 3130 skb_shinfo(skb)->gso_segs == 1) 3131 features &= ~NETIF_F_GSO_MASK; 3132 } 3133 3134 return features; 3135 } 3136 3137 static const struct net_device_ops ibmvnic_netdev_ops = { 3138 .ndo_open = ibmvnic_open, 3139 .ndo_stop = ibmvnic_close, 3140 .ndo_start_xmit = ibmvnic_xmit, 3141 .ndo_set_rx_mode = ibmvnic_set_multi, 3142 .ndo_set_mac_address = ibmvnic_set_mac, 3143 .ndo_validate_addr = eth_validate_addr, 3144 .ndo_tx_timeout = ibmvnic_tx_timeout, 3145 .ndo_change_mtu = ibmvnic_change_mtu, 3146 .ndo_features_check = ibmvnic_features_check, 3147 }; 3148 3149 /* ethtool functions */ 3150 3151 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3152 struct ethtool_link_ksettings *cmd) 3153 { 3154 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3155 int rc; 3156 3157 rc = send_query_phys_parms(adapter); 3158 if (rc) { 3159 adapter->speed = SPEED_UNKNOWN; 3160 adapter->duplex = DUPLEX_UNKNOWN; 3161 } 3162 cmd->base.speed = adapter->speed; 3163 cmd->base.duplex = adapter->duplex; 3164 cmd->base.port = PORT_FIBRE; 3165 cmd->base.phy_address = 0; 3166 cmd->base.autoneg = AUTONEG_ENABLE; 3167 3168 return 0; 3169 } 3170 3171 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3172 struct ethtool_drvinfo *info) 3173 { 3174 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3175 3176 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3177 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3178 strscpy(info->fw_version, adapter->fw_version, 3179 sizeof(info->fw_version)); 3180 } 3181 3182 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3183 { 3184 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3185 3186 return adapter->msg_enable; 3187 } 3188 3189 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3190 { 3191 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3192 3193 adapter->msg_enable = data; 3194 } 3195 3196 static u32 ibmvnic_get_link(struct net_device *netdev) 3197 { 3198 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3199 3200 /* Don't need to send a query because we request a logical link up at 3201 * init and then we wait for link state indications 3202 */ 3203 return adapter->logical_link_state; 3204 } 3205 3206 static void ibmvnic_get_ringparam(struct net_device *netdev, 3207 struct ethtool_ringparam *ring, 3208 struct kernel_ethtool_ringparam *kernel_ring, 3209 struct netlink_ext_ack *extack) 3210 { 3211 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3212 3213 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3214 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3215 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3216 } else { 3217 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3218 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3219 } 3220 ring->rx_mini_max_pending = 0; 3221 ring->rx_jumbo_max_pending = 0; 3222 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3223 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3224 ring->rx_mini_pending = 0; 3225 ring->rx_jumbo_pending = 0; 3226 } 3227 3228 static int ibmvnic_set_ringparam(struct net_device *netdev, 3229 struct ethtool_ringparam *ring, 3230 struct kernel_ethtool_ringparam *kernel_ring, 3231 struct netlink_ext_ack *extack) 3232 { 3233 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3234 int ret; 3235 3236 ret = 0; 3237 adapter->desired.rx_entries = ring->rx_pending; 3238 adapter->desired.tx_entries = ring->tx_pending; 3239 3240 ret = wait_for_reset(adapter); 3241 3242 if (!ret && 3243 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 3244 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 3245 netdev_info(netdev, 3246 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3247 ring->rx_pending, ring->tx_pending, 3248 adapter->req_rx_add_entries_per_subcrq, 3249 adapter->req_tx_entries_per_subcrq); 3250 return ret; 3251 } 3252 3253 static void ibmvnic_get_channels(struct net_device *netdev, 3254 struct ethtool_channels *channels) 3255 { 3256 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3257 3258 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3259 channels->max_rx = adapter->max_rx_queues; 3260 channels->max_tx = adapter->max_tx_queues; 3261 } else { 3262 channels->max_rx = IBMVNIC_MAX_QUEUES; 3263 channels->max_tx = IBMVNIC_MAX_QUEUES; 3264 } 3265 3266 channels->max_other = 0; 3267 channels->max_combined = 0; 3268 channels->rx_count = adapter->req_rx_queues; 3269 channels->tx_count = adapter->req_tx_queues; 3270 channels->other_count = 0; 3271 channels->combined_count = 0; 3272 } 3273 3274 static int ibmvnic_set_channels(struct net_device *netdev, 3275 struct ethtool_channels *channels) 3276 { 3277 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3278 int ret; 3279 3280 ret = 0; 3281 adapter->desired.rx_queues = channels->rx_count; 3282 adapter->desired.tx_queues = channels->tx_count; 3283 3284 ret = wait_for_reset(adapter); 3285 3286 if (!ret && 3287 (adapter->req_rx_queues != channels->rx_count || 3288 adapter->req_tx_queues != channels->tx_count)) 3289 netdev_info(netdev, 3290 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3291 channels->rx_count, channels->tx_count, 3292 adapter->req_rx_queues, adapter->req_tx_queues); 3293 return ret; 3294 } 3295 3296 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3297 { 3298 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3299 int i; 3300 3301 switch (stringset) { 3302 case ETH_SS_STATS: 3303 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 3304 i++, data += ETH_GSTRING_LEN) 3305 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3306 3307 for (i = 0; i < adapter->req_tx_queues; i++) { 3308 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3309 data += ETH_GSTRING_LEN; 3310 3311 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3312 data += ETH_GSTRING_LEN; 3313 3314 snprintf(data, ETH_GSTRING_LEN, 3315 "tx%d_dropped_packets", i); 3316 data += ETH_GSTRING_LEN; 3317 } 3318 3319 for (i = 0; i < adapter->req_rx_queues; i++) { 3320 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3321 data += ETH_GSTRING_LEN; 3322 3323 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3324 data += ETH_GSTRING_LEN; 3325 3326 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3327 data += ETH_GSTRING_LEN; 3328 } 3329 break; 3330 3331 case ETH_SS_PRIV_FLAGS: 3332 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3333 strcpy(data + i * ETH_GSTRING_LEN, 3334 ibmvnic_priv_flags[i]); 3335 break; 3336 default: 3337 return; 3338 } 3339 } 3340 3341 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3342 { 3343 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3344 3345 switch (sset) { 3346 case ETH_SS_STATS: 3347 return ARRAY_SIZE(ibmvnic_stats) + 3348 adapter->req_tx_queues * NUM_TX_STATS + 3349 adapter->req_rx_queues * NUM_RX_STATS; 3350 case ETH_SS_PRIV_FLAGS: 3351 return ARRAY_SIZE(ibmvnic_priv_flags); 3352 default: 3353 return -EOPNOTSUPP; 3354 } 3355 } 3356 3357 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3358 struct ethtool_stats *stats, u64 *data) 3359 { 3360 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3361 union ibmvnic_crq crq; 3362 int i, j; 3363 int rc; 3364 3365 memset(&crq, 0, sizeof(crq)); 3366 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3367 crq.request_statistics.cmd = REQUEST_STATISTICS; 3368 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3369 crq.request_statistics.len = 3370 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3371 3372 /* Wait for data to be written */ 3373 reinit_completion(&adapter->stats_done); 3374 rc = ibmvnic_send_crq(adapter, &crq); 3375 if (rc) 3376 return; 3377 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3378 if (rc) 3379 return; 3380 3381 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3382 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3383 (adapter, ibmvnic_stats[i].offset)); 3384 3385 for (j = 0; j < adapter->req_tx_queues; j++) { 3386 data[i] = adapter->tx_stats_buffers[j].packets; 3387 i++; 3388 data[i] = adapter->tx_stats_buffers[j].bytes; 3389 i++; 3390 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3391 i++; 3392 } 3393 3394 for (j = 0; j < adapter->req_rx_queues; j++) { 3395 data[i] = adapter->rx_stats_buffers[j].packets; 3396 i++; 3397 data[i] = adapter->rx_stats_buffers[j].bytes; 3398 i++; 3399 data[i] = adapter->rx_stats_buffers[j].interrupts; 3400 i++; 3401 } 3402 } 3403 3404 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3405 { 3406 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3407 3408 return adapter->priv_flags; 3409 } 3410 3411 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3412 { 3413 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3414 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3415 3416 if (which_maxes) 3417 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3418 else 3419 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3420 3421 return 0; 3422 } 3423 3424 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3425 .get_drvinfo = ibmvnic_get_drvinfo, 3426 .get_msglevel = ibmvnic_get_msglevel, 3427 .set_msglevel = ibmvnic_set_msglevel, 3428 .get_link = ibmvnic_get_link, 3429 .get_ringparam = ibmvnic_get_ringparam, 3430 .set_ringparam = ibmvnic_set_ringparam, 3431 .get_channels = ibmvnic_get_channels, 3432 .set_channels = ibmvnic_set_channels, 3433 .get_strings = ibmvnic_get_strings, 3434 .get_sset_count = ibmvnic_get_sset_count, 3435 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3436 .get_link_ksettings = ibmvnic_get_link_ksettings, 3437 .get_priv_flags = ibmvnic_get_priv_flags, 3438 .set_priv_flags = ibmvnic_set_priv_flags, 3439 }; 3440 3441 /* Routines for managing CRQs/sCRQs */ 3442 3443 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3444 struct ibmvnic_sub_crq_queue *scrq) 3445 { 3446 int rc; 3447 3448 if (!scrq) { 3449 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3450 return -EINVAL; 3451 } 3452 3453 if (scrq->irq) { 3454 free_irq(scrq->irq, scrq); 3455 irq_dispose_mapping(scrq->irq); 3456 scrq->irq = 0; 3457 } 3458 3459 if (scrq->msgs) { 3460 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3461 atomic_set(&scrq->used, 0); 3462 scrq->cur = 0; 3463 scrq->ind_buf.index = 0; 3464 } else { 3465 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3466 return -EINVAL; 3467 } 3468 3469 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3470 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3471 return rc; 3472 } 3473 3474 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3475 { 3476 int i, rc; 3477 3478 if (!adapter->tx_scrq || !adapter->rx_scrq) 3479 return -EINVAL; 3480 3481 for (i = 0; i < adapter->req_tx_queues; i++) { 3482 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3483 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3484 if (rc) 3485 return rc; 3486 } 3487 3488 for (i = 0; i < adapter->req_rx_queues; i++) { 3489 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3490 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3491 if (rc) 3492 return rc; 3493 } 3494 3495 return rc; 3496 } 3497 3498 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3499 struct ibmvnic_sub_crq_queue *scrq, 3500 bool do_h_free) 3501 { 3502 struct device *dev = &adapter->vdev->dev; 3503 long rc; 3504 3505 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3506 3507 if (do_h_free) { 3508 /* Close the sub-crqs */ 3509 do { 3510 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3511 adapter->vdev->unit_address, 3512 scrq->crq_num); 3513 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3514 3515 if (rc) { 3516 netdev_err(adapter->netdev, 3517 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3518 scrq->crq_num, rc); 3519 } 3520 } 3521 3522 dma_free_coherent(dev, 3523 IBMVNIC_IND_ARR_SZ, 3524 scrq->ind_buf.indir_arr, 3525 scrq->ind_buf.indir_dma); 3526 3527 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3528 DMA_BIDIRECTIONAL); 3529 free_pages((unsigned long)scrq->msgs, 2); 3530 kfree(scrq); 3531 } 3532 3533 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3534 *adapter) 3535 { 3536 struct device *dev = &adapter->vdev->dev; 3537 struct ibmvnic_sub_crq_queue *scrq; 3538 int rc; 3539 3540 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3541 if (!scrq) 3542 return NULL; 3543 3544 scrq->msgs = 3545 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3546 if (!scrq->msgs) { 3547 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3548 goto zero_page_failed; 3549 } 3550 3551 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3552 DMA_BIDIRECTIONAL); 3553 if (dma_mapping_error(dev, scrq->msg_token)) { 3554 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3555 goto map_failed; 3556 } 3557 3558 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3559 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3560 3561 if (rc == H_RESOURCE) 3562 rc = ibmvnic_reset_crq(adapter); 3563 3564 if (rc == H_CLOSED) { 3565 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3566 } else if (rc) { 3567 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3568 goto reg_failed; 3569 } 3570 3571 scrq->adapter = adapter; 3572 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3573 scrq->ind_buf.index = 0; 3574 3575 scrq->ind_buf.indir_arr = 3576 dma_alloc_coherent(dev, 3577 IBMVNIC_IND_ARR_SZ, 3578 &scrq->ind_buf.indir_dma, 3579 GFP_KERNEL); 3580 3581 if (!scrq->ind_buf.indir_arr) 3582 goto indir_failed; 3583 3584 spin_lock_init(&scrq->lock); 3585 3586 netdev_dbg(adapter->netdev, 3587 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3588 scrq->crq_num, scrq->hw_irq, scrq->irq); 3589 3590 return scrq; 3591 3592 indir_failed: 3593 do { 3594 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3595 adapter->vdev->unit_address, 3596 scrq->crq_num); 3597 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3598 reg_failed: 3599 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3600 DMA_BIDIRECTIONAL); 3601 map_failed: 3602 free_pages((unsigned long)scrq->msgs, 2); 3603 zero_page_failed: 3604 kfree(scrq); 3605 3606 return NULL; 3607 } 3608 3609 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3610 { 3611 int i; 3612 3613 if (adapter->tx_scrq) { 3614 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3615 if (!adapter->tx_scrq[i]) 3616 continue; 3617 3618 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3619 i); 3620 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3621 if (adapter->tx_scrq[i]->irq) { 3622 free_irq(adapter->tx_scrq[i]->irq, 3623 adapter->tx_scrq[i]); 3624 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3625 adapter->tx_scrq[i]->irq = 0; 3626 } 3627 3628 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3629 do_h_free); 3630 } 3631 3632 kfree(adapter->tx_scrq); 3633 adapter->tx_scrq = NULL; 3634 adapter->num_active_tx_scrqs = 0; 3635 } 3636 3637 if (adapter->rx_scrq) { 3638 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3639 if (!adapter->rx_scrq[i]) 3640 continue; 3641 3642 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3643 i); 3644 if (adapter->rx_scrq[i]->irq) { 3645 free_irq(adapter->rx_scrq[i]->irq, 3646 adapter->rx_scrq[i]); 3647 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3648 adapter->rx_scrq[i]->irq = 0; 3649 } 3650 3651 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3652 do_h_free); 3653 } 3654 3655 kfree(adapter->rx_scrq); 3656 adapter->rx_scrq = NULL; 3657 adapter->num_active_rx_scrqs = 0; 3658 } 3659 } 3660 3661 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3662 struct ibmvnic_sub_crq_queue *scrq) 3663 { 3664 struct device *dev = &adapter->vdev->dev; 3665 unsigned long rc; 3666 3667 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3668 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3669 if (rc) 3670 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3671 scrq->hw_irq, rc); 3672 return rc; 3673 } 3674 3675 /* We can not use the IRQ chip EOI handler because that has the 3676 * unintended effect of changing the interrupt priority. 3677 */ 3678 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 3679 { 3680 u64 val = 0xff000000 | scrq->hw_irq; 3681 unsigned long rc; 3682 3683 rc = plpar_hcall_norets(H_EOI, val); 3684 if (rc) 3685 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 3686 } 3687 3688 /* Due to a firmware bug, the hypervisor can send an interrupt to a 3689 * transmit or receive queue just prior to a partition migration. 3690 * Force an EOI after migration. 3691 */ 3692 static void ibmvnic_clear_pending_interrupt(struct device *dev, 3693 struct ibmvnic_sub_crq_queue *scrq) 3694 { 3695 if (!xive_enabled()) 3696 ibmvnic_xics_eoi(dev, scrq); 3697 } 3698 3699 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3700 struct ibmvnic_sub_crq_queue *scrq) 3701 { 3702 struct device *dev = &adapter->vdev->dev; 3703 unsigned long rc; 3704 3705 if (scrq->hw_irq > 0x100000000ULL) { 3706 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3707 return 1; 3708 } 3709 3710 if (test_bit(0, &adapter->resetting) && 3711 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3712 ibmvnic_clear_pending_interrupt(dev, scrq); 3713 } 3714 3715 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3716 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3717 if (rc) 3718 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3719 scrq->hw_irq, rc); 3720 return rc; 3721 } 3722 3723 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3724 struct ibmvnic_sub_crq_queue *scrq) 3725 { 3726 struct device *dev = &adapter->vdev->dev; 3727 struct ibmvnic_tx_pool *tx_pool; 3728 struct ibmvnic_tx_buff *txbuff; 3729 struct netdev_queue *txq; 3730 union sub_crq *next; 3731 int index; 3732 int i; 3733 3734 restart_loop: 3735 while (pending_scrq(adapter, scrq)) { 3736 unsigned int pool = scrq->pool_index; 3737 int num_entries = 0; 3738 int total_bytes = 0; 3739 int num_packets = 0; 3740 3741 next = ibmvnic_next_scrq(adapter, scrq); 3742 for (i = 0; i < next->tx_comp.num_comps; i++) { 3743 index = be32_to_cpu(next->tx_comp.correlators[i]); 3744 if (index & IBMVNIC_TSO_POOL_MASK) { 3745 tx_pool = &adapter->tso_pool[pool]; 3746 index &= ~IBMVNIC_TSO_POOL_MASK; 3747 } else { 3748 tx_pool = &adapter->tx_pool[pool]; 3749 } 3750 3751 txbuff = &tx_pool->tx_buff[index]; 3752 num_packets++; 3753 num_entries += txbuff->num_entries; 3754 if (txbuff->skb) { 3755 total_bytes += txbuff->skb->len; 3756 if (next->tx_comp.rcs[i]) { 3757 dev_err(dev, "tx error %x\n", 3758 next->tx_comp.rcs[i]); 3759 dev_kfree_skb_irq(txbuff->skb); 3760 } else { 3761 dev_consume_skb_irq(txbuff->skb); 3762 } 3763 txbuff->skb = NULL; 3764 } else { 3765 netdev_warn(adapter->netdev, 3766 "TX completion received with NULL socket buffer\n"); 3767 } 3768 tx_pool->free_map[tx_pool->producer_index] = index; 3769 tx_pool->producer_index = 3770 (tx_pool->producer_index + 1) % 3771 tx_pool->num_buffers; 3772 } 3773 /* remove tx_comp scrq*/ 3774 next->tx_comp.first = 0; 3775 3776 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3777 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3778 3779 if (atomic_sub_return(num_entries, &scrq->used) <= 3780 (adapter->req_tx_entries_per_subcrq / 2) && 3781 __netif_subqueue_stopped(adapter->netdev, 3782 scrq->pool_index)) { 3783 rcu_read_lock(); 3784 if (adapter->tx_queues_active) { 3785 netif_wake_subqueue(adapter->netdev, 3786 scrq->pool_index); 3787 netdev_dbg(adapter->netdev, 3788 "Started queue %d\n", 3789 scrq->pool_index); 3790 } 3791 rcu_read_unlock(); 3792 } 3793 } 3794 3795 enable_scrq_irq(adapter, scrq); 3796 3797 if (pending_scrq(adapter, scrq)) { 3798 disable_scrq_irq(adapter, scrq); 3799 goto restart_loop; 3800 } 3801 3802 return 0; 3803 } 3804 3805 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3806 { 3807 struct ibmvnic_sub_crq_queue *scrq = instance; 3808 struct ibmvnic_adapter *adapter = scrq->adapter; 3809 3810 disable_scrq_irq(adapter, scrq); 3811 ibmvnic_complete_tx(adapter, scrq); 3812 3813 return IRQ_HANDLED; 3814 } 3815 3816 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3817 { 3818 struct ibmvnic_sub_crq_queue *scrq = instance; 3819 struct ibmvnic_adapter *adapter = scrq->adapter; 3820 3821 /* When booting a kdump kernel we can hit pending interrupts 3822 * prior to completing driver initialization. 3823 */ 3824 if (unlikely(adapter->state != VNIC_OPEN)) 3825 return IRQ_NONE; 3826 3827 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3828 3829 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3830 disable_scrq_irq(adapter, scrq); 3831 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3832 } 3833 3834 return IRQ_HANDLED; 3835 } 3836 3837 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3838 { 3839 struct device *dev = &adapter->vdev->dev; 3840 struct ibmvnic_sub_crq_queue *scrq; 3841 int i = 0, j = 0; 3842 int rc = 0; 3843 3844 for (i = 0; i < adapter->req_tx_queues; i++) { 3845 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3846 i); 3847 scrq = adapter->tx_scrq[i]; 3848 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3849 3850 if (!scrq->irq) { 3851 rc = -EINVAL; 3852 dev_err(dev, "Error mapping irq\n"); 3853 goto req_tx_irq_failed; 3854 } 3855 3856 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3857 adapter->vdev->unit_address, i); 3858 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3859 0, scrq->name, scrq); 3860 3861 if (rc) { 3862 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3863 scrq->irq, rc); 3864 irq_dispose_mapping(scrq->irq); 3865 goto req_tx_irq_failed; 3866 } 3867 } 3868 3869 for (i = 0; i < adapter->req_rx_queues; i++) { 3870 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3871 i); 3872 scrq = adapter->rx_scrq[i]; 3873 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3874 if (!scrq->irq) { 3875 rc = -EINVAL; 3876 dev_err(dev, "Error mapping irq\n"); 3877 goto req_rx_irq_failed; 3878 } 3879 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3880 adapter->vdev->unit_address, i); 3881 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3882 0, scrq->name, scrq); 3883 if (rc) { 3884 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3885 scrq->irq, rc); 3886 irq_dispose_mapping(scrq->irq); 3887 goto req_rx_irq_failed; 3888 } 3889 } 3890 return rc; 3891 3892 req_rx_irq_failed: 3893 for (j = 0; j < i; j++) { 3894 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3895 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3896 } 3897 i = adapter->req_tx_queues; 3898 req_tx_irq_failed: 3899 for (j = 0; j < i; j++) { 3900 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3901 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3902 } 3903 release_sub_crqs(adapter, 1); 3904 return rc; 3905 } 3906 3907 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3908 { 3909 struct device *dev = &adapter->vdev->dev; 3910 struct ibmvnic_sub_crq_queue **allqueues; 3911 int registered_queues = 0; 3912 int total_queues; 3913 int more = 0; 3914 int i; 3915 3916 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3917 3918 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3919 if (!allqueues) 3920 return -ENOMEM; 3921 3922 for (i = 0; i < total_queues; i++) { 3923 allqueues[i] = init_sub_crq_queue(adapter); 3924 if (!allqueues[i]) { 3925 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3926 break; 3927 } 3928 registered_queues++; 3929 } 3930 3931 /* Make sure we were able to register the minimum number of queues */ 3932 if (registered_queues < 3933 adapter->min_tx_queues + adapter->min_rx_queues) { 3934 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3935 goto tx_failed; 3936 } 3937 3938 /* Distribute the failed allocated queues*/ 3939 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3940 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3941 switch (i % 3) { 3942 case 0: 3943 if (adapter->req_rx_queues > adapter->min_rx_queues) 3944 adapter->req_rx_queues--; 3945 else 3946 more++; 3947 break; 3948 case 1: 3949 if (adapter->req_tx_queues > adapter->min_tx_queues) 3950 adapter->req_tx_queues--; 3951 else 3952 more++; 3953 break; 3954 } 3955 } 3956 3957 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3958 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3959 if (!adapter->tx_scrq) 3960 goto tx_failed; 3961 3962 for (i = 0; i < adapter->req_tx_queues; i++) { 3963 adapter->tx_scrq[i] = allqueues[i]; 3964 adapter->tx_scrq[i]->pool_index = i; 3965 adapter->num_active_tx_scrqs++; 3966 } 3967 3968 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3969 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3970 if (!adapter->rx_scrq) 3971 goto rx_failed; 3972 3973 for (i = 0; i < adapter->req_rx_queues; i++) { 3974 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3975 adapter->rx_scrq[i]->scrq_num = i; 3976 adapter->num_active_rx_scrqs++; 3977 } 3978 3979 kfree(allqueues); 3980 return 0; 3981 3982 rx_failed: 3983 kfree(adapter->tx_scrq); 3984 adapter->tx_scrq = NULL; 3985 tx_failed: 3986 for (i = 0; i < registered_queues; i++) 3987 release_sub_crq_queue(adapter, allqueues[i], 1); 3988 kfree(allqueues); 3989 return -ENOMEM; 3990 } 3991 3992 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3993 { 3994 struct device *dev = &adapter->vdev->dev; 3995 union ibmvnic_crq crq; 3996 int max_entries; 3997 int cap_reqs; 3998 3999 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4000 * the PROMISC flag). Initialize this count upfront. When the tasklet 4001 * receives a response to all of these, it will send the next protocol 4002 * message (QUERY_IP_OFFLOAD). 4003 */ 4004 if (!(adapter->netdev->flags & IFF_PROMISC) || 4005 adapter->promisc_supported) 4006 cap_reqs = 7; 4007 else 4008 cap_reqs = 6; 4009 4010 if (!retry) { 4011 /* Sub-CRQ entries are 32 byte long */ 4012 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4013 4014 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4015 4016 if (adapter->min_tx_entries_per_subcrq > entries_page || 4017 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4018 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4019 return; 4020 } 4021 4022 if (adapter->desired.mtu) 4023 adapter->req_mtu = adapter->desired.mtu; 4024 else 4025 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4026 4027 if (!adapter->desired.tx_entries) 4028 adapter->desired.tx_entries = 4029 adapter->max_tx_entries_per_subcrq; 4030 if (!adapter->desired.rx_entries) 4031 adapter->desired.rx_entries = 4032 adapter->max_rx_add_entries_per_subcrq; 4033 4034 max_entries = IBMVNIC_MAX_LTB_SIZE / 4035 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4036 4037 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4038 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 4039 adapter->desired.tx_entries = max_entries; 4040 } 4041 4042 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4043 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 4044 adapter->desired.rx_entries = max_entries; 4045 } 4046 4047 if (adapter->desired.tx_entries) 4048 adapter->req_tx_entries_per_subcrq = 4049 adapter->desired.tx_entries; 4050 else 4051 adapter->req_tx_entries_per_subcrq = 4052 adapter->max_tx_entries_per_subcrq; 4053 4054 if (adapter->desired.rx_entries) 4055 adapter->req_rx_add_entries_per_subcrq = 4056 adapter->desired.rx_entries; 4057 else 4058 adapter->req_rx_add_entries_per_subcrq = 4059 adapter->max_rx_add_entries_per_subcrq; 4060 4061 if (adapter->desired.tx_queues) 4062 adapter->req_tx_queues = 4063 adapter->desired.tx_queues; 4064 else 4065 adapter->req_tx_queues = 4066 adapter->opt_tx_comp_sub_queues; 4067 4068 if (adapter->desired.rx_queues) 4069 adapter->req_rx_queues = 4070 adapter->desired.rx_queues; 4071 else 4072 adapter->req_rx_queues = 4073 adapter->opt_rx_comp_queues; 4074 4075 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4076 } else { 4077 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4078 } 4079 memset(&crq, 0, sizeof(crq)); 4080 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4081 crq.request_capability.cmd = REQUEST_CAPABILITY; 4082 4083 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4084 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4085 cap_reqs--; 4086 ibmvnic_send_crq(adapter, &crq); 4087 4088 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4089 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4090 cap_reqs--; 4091 ibmvnic_send_crq(adapter, &crq); 4092 4093 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4094 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4095 cap_reqs--; 4096 ibmvnic_send_crq(adapter, &crq); 4097 4098 crq.request_capability.capability = 4099 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4100 crq.request_capability.number = 4101 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4102 cap_reqs--; 4103 ibmvnic_send_crq(adapter, &crq); 4104 4105 crq.request_capability.capability = 4106 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4107 crq.request_capability.number = 4108 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4109 cap_reqs--; 4110 ibmvnic_send_crq(adapter, &crq); 4111 4112 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4113 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4114 cap_reqs--; 4115 ibmvnic_send_crq(adapter, &crq); 4116 4117 if (adapter->netdev->flags & IFF_PROMISC) { 4118 if (adapter->promisc_supported) { 4119 crq.request_capability.capability = 4120 cpu_to_be16(PROMISC_REQUESTED); 4121 crq.request_capability.number = cpu_to_be64(1); 4122 cap_reqs--; 4123 ibmvnic_send_crq(adapter, &crq); 4124 } 4125 } else { 4126 crq.request_capability.capability = 4127 cpu_to_be16(PROMISC_REQUESTED); 4128 crq.request_capability.number = cpu_to_be64(0); 4129 cap_reqs--; 4130 ibmvnic_send_crq(adapter, &crq); 4131 } 4132 4133 /* Keep at end to catch any discrepancy between expected and actual 4134 * CRQs sent. 4135 */ 4136 WARN_ON(cap_reqs != 0); 4137 } 4138 4139 static int pending_scrq(struct ibmvnic_adapter *adapter, 4140 struct ibmvnic_sub_crq_queue *scrq) 4141 { 4142 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4143 int rc; 4144 4145 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4146 4147 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4148 * contents of the SCRQ descriptor 4149 */ 4150 dma_rmb(); 4151 4152 return rc; 4153 } 4154 4155 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4156 struct ibmvnic_sub_crq_queue *scrq) 4157 { 4158 union sub_crq *entry; 4159 unsigned long flags; 4160 4161 spin_lock_irqsave(&scrq->lock, flags); 4162 entry = &scrq->msgs[scrq->cur]; 4163 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4164 if (++scrq->cur == scrq->size) 4165 scrq->cur = 0; 4166 } else { 4167 entry = NULL; 4168 } 4169 spin_unlock_irqrestore(&scrq->lock, flags); 4170 4171 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4172 * contents of the SCRQ descriptor 4173 */ 4174 dma_rmb(); 4175 4176 return entry; 4177 } 4178 4179 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4180 { 4181 struct ibmvnic_crq_queue *queue = &adapter->crq; 4182 union ibmvnic_crq *crq; 4183 4184 crq = &queue->msgs[queue->cur]; 4185 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4186 if (++queue->cur == queue->size) 4187 queue->cur = 0; 4188 } else { 4189 crq = NULL; 4190 } 4191 4192 return crq; 4193 } 4194 4195 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4196 { 4197 switch (rc) { 4198 case H_PARAMETER: 4199 dev_warn_ratelimited(dev, 4200 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4201 func, rc); 4202 break; 4203 case H_CLOSED: 4204 dev_warn_ratelimited(dev, 4205 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4206 func, rc); 4207 break; 4208 default: 4209 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4210 break; 4211 } 4212 } 4213 4214 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4215 u64 remote_handle, u64 ioba, u64 num_entries) 4216 { 4217 unsigned int ua = adapter->vdev->unit_address; 4218 struct device *dev = &adapter->vdev->dev; 4219 int rc; 4220 4221 /* Make sure the hypervisor sees the complete request */ 4222 dma_wmb(); 4223 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4224 cpu_to_be64(remote_handle), 4225 ioba, num_entries); 4226 4227 if (rc) 4228 print_subcrq_error(dev, rc, __func__); 4229 4230 return rc; 4231 } 4232 4233 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4234 union ibmvnic_crq *crq) 4235 { 4236 unsigned int ua = adapter->vdev->unit_address; 4237 struct device *dev = &adapter->vdev->dev; 4238 u64 *u64_crq = (u64 *)crq; 4239 int rc; 4240 4241 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4242 (unsigned long)cpu_to_be64(u64_crq[0]), 4243 (unsigned long)cpu_to_be64(u64_crq[1])); 4244 4245 if (!adapter->crq.active && 4246 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4247 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4248 return -EINVAL; 4249 } 4250 4251 /* Make sure the hypervisor sees the complete request */ 4252 dma_wmb(); 4253 4254 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4255 cpu_to_be64(u64_crq[0]), 4256 cpu_to_be64(u64_crq[1])); 4257 4258 if (rc) { 4259 if (rc == H_CLOSED) { 4260 dev_warn(dev, "CRQ Queue closed\n"); 4261 /* do not reset, report the fail, wait for passive init from server */ 4262 } 4263 4264 dev_warn(dev, "Send error (rc=%d)\n", rc); 4265 } 4266 4267 return rc; 4268 } 4269 4270 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4271 { 4272 struct device *dev = &adapter->vdev->dev; 4273 union ibmvnic_crq crq; 4274 int retries = 100; 4275 int rc; 4276 4277 memset(&crq, 0, sizeof(crq)); 4278 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4279 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4280 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4281 4282 do { 4283 rc = ibmvnic_send_crq(adapter, &crq); 4284 if (rc != H_CLOSED) 4285 break; 4286 retries--; 4287 msleep(50); 4288 4289 } while (retries > 0); 4290 4291 if (rc) { 4292 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4293 return rc; 4294 } 4295 4296 return 0; 4297 } 4298 4299 struct vnic_login_client_data { 4300 u8 type; 4301 __be16 len; 4302 char name[]; 4303 } __packed; 4304 4305 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4306 { 4307 int len; 4308 4309 /* Calculate the amount of buffer space needed for the 4310 * vnic client data in the login buffer. There are four entries, 4311 * OS name, LPAR name, device name, and a null last entry. 4312 */ 4313 len = 4 * sizeof(struct vnic_login_client_data); 4314 len += 6; /* "Linux" plus NULL */ 4315 len += strlen(utsname()->nodename) + 1; 4316 len += strlen(adapter->netdev->name) + 1; 4317 4318 return len; 4319 } 4320 4321 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4322 struct vnic_login_client_data *vlcd) 4323 { 4324 const char *os_name = "Linux"; 4325 int len; 4326 4327 /* Type 1 - LPAR OS */ 4328 vlcd->type = 1; 4329 len = strlen(os_name) + 1; 4330 vlcd->len = cpu_to_be16(len); 4331 strscpy(vlcd->name, os_name, len); 4332 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4333 4334 /* Type 2 - LPAR name */ 4335 vlcd->type = 2; 4336 len = strlen(utsname()->nodename) + 1; 4337 vlcd->len = cpu_to_be16(len); 4338 strscpy(vlcd->name, utsname()->nodename, len); 4339 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4340 4341 /* Type 3 - device name */ 4342 vlcd->type = 3; 4343 len = strlen(adapter->netdev->name) + 1; 4344 vlcd->len = cpu_to_be16(len); 4345 strscpy(vlcd->name, adapter->netdev->name, len); 4346 } 4347 4348 static int send_login(struct ibmvnic_adapter *adapter) 4349 { 4350 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4351 struct ibmvnic_login_buffer *login_buffer; 4352 struct device *dev = &adapter->vdev->dev; 4353 struct vnic_login_client_data *vlcd; 4354 dma_addr_t rsp_buffer_token; 4355 dma_addr_t buffer_token; 4356 size_t rsp_buffer_size; 4357 union ibmvnic_crq crq; 4358 int client_data_len; 4359 size_t buffer_size; 4360 __be64 *tx_list_p; 4361 __be64 *rx_list_p; 4362 int rc; 4363 int i; 4364 4365 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4366 netdev_err(adapter->netdev, 4367 "RX or TX queues are not allocated, device login failed\n"); 4368 return -ENOMEM; 4369 } 4370 4371 release_login_buffer(adapter); 4372 release_login_rsp_buffer(adapter); 4373 4374 client_data_len = vnic_client_data_len(adapter); 4375 4376 buffer_size = 4377 sizeof(struct ibmvnic_login_buffer) + 4378 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4379 client_data_len; 4380 4381 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4382 if (!login_buffer) 4383 goto buf_alloc_failed; 4384 4385 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4386 DMA_TO_DEVICE); 4387 if (dma_mapping_error(dev, buffer_token)) { 4388 dev_err(dev, "Couldn't map login buffer\n"); 4389 goto buf_map_failed; 4390 } 4391 4392 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4393 sizeof(u64) * adapter->req_tx_queues + 4394 sizeof(u64) * adapter->req_rx_queues + 4395 sizeof(u64) * adapter->req_rx_queues + 4396 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4397 4398 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4399 if (!login_rsp_buffer) 4400 goto buf_rsp_alloc_failed; 4401 4402 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4403 rsp_buffer_size, DMA_FROM_DEVICE); 4404 if (dma_mapping_error(dev, rsp_buffer_token)) { 4405 dev_err(dev, "Couldn't map login rsp buffer\n"); 4406 goto buf_rsp_map_failed; 4407 } 4408 4409 adapter->login_buf = login_buffer; 4410 adapter->login_buf_token = buffer_token; 4411 adapter->login_buf_sz = buffer_size; 4412 adapter->login_rsp_buf = login_rsp_buffer; 4413 adapter->login_rsp_buf_token = rsp_buffer_token; 4414 adapter->login_rsp_buf_sz = rsp_buffer_size; 4415 4416 login_buffer->len = cpu_to_be32(buffer_size); 4417 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4418 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4419 login_buffer->off_txcomp_subcrqs = 4420 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4421 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4422 login_buffer->off_rxcomp_subcrqs = 4423 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4424 sizeof(u64) * adapter->req_tx_queues); 4425 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4426 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4427 4428 tx_list_p = (__be64 *)((char *)login_buffer + 4429 sizeof(struct ibmvnic_login_buffer)); 4430 rx_list_p = (__be64 *)((char *)login_buffer + 4431 sizeof(struct ibmvnic_login_buffer) + 4432 sizeof(u64) * adapter->req_tx_queues); 4433 4434 for (i = 0; i < adapter->req_tx_queues; i++) { 4435 if (adapter->tx_scrq[i]) { 4436 tx_list_p[i] = 4437 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4438 } 4439 } 4440 4441 for (i = 0; i < adapter->req_rx_queues; i++) { 4442 if (adapter->rx_scrq[i]) { 4443 rx_list_p[i] = 4444 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4445 } 4446 } 4447 4448 /* Insert vNIC login client data */ 4449 vlcd = (struct vnic_login_client_data *) 4450 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4451 login_buffer->client_data_offset = 4452 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4453 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4454 4455 vnic_add_client_data(adapter, vlcd); 4456 4457 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4458 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4459 netdev_dbg(adapter->netdev, "%016lx\n", 4460 ((unsigned long *)(adapter->login_buf))[i]); 4461 } 4462 4463 memset(&crq, 0, sizeof(crq)); 4464 crq.login.first = IBMVNIC_CRQ_CMD; 4465 crq.login.cmd = LOGIN; 4466 crq.login.ioba = cpu_to_be32(buffer_token); 4467 crq.login.len = cpu_to_be32(buffer_size); 4468 4469 adapter->login_pending = true; 4470 rc = ibmvnic_send_crq(adapter, &crq); 4471 if (rc) { 4472 adapter->login_pending = false; 4473 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4474 goto buf_rsp_map_failed; 4475 } 4476 4477 return 0; 4478 4479 buf_rsp_map_failed: 4480 kfree(login_rsp_buffer); 4481 adapter->login_rsp_buf = NULL; 4482 buf_rsp_alloc_failed: 4483 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4484 buf_map_failed: 4485 kfree(login_buffer); 4486 adapter->login_buf = NULL; 4487 buf_alloc_failed: 4488 return -ENOMEM; 4489 } 4490 4491 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4492 u32 len, u8 map_id) 4493 { 4494 union ibmvnic_crq crq; 4495 4496 memset(&crq, 0, sizeof(crq)); 4497 crq.request_map.first = IBMVNIC_CRQ_CMD; 4498 crq.request_map.cmd = REQUEST_MAP; 4499 crq.request_map.map_id = map_id; 4500 crq.request_map.ioba = cpu_to_be32(addr); 4501 crq.request_map.len = cpu_to_be32(len); 4502 return ibmvnic_send_crq(adapter, &crq); 4503 } 4504 4505 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4506 { 4507 union ibmvnic_crq crq; 4508 4509 memset(&crq, 0, sizeof(crq)); 4510 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4511 crq.request_unmap.cmd = REQUEST_UNMAP; 4512 crq.request_unmap.map_id = map_id; 4513 return ibmvnic_send_crq(adapter, &crq); 4514 } 4515 4516 static void send_query_map(struct ibmvnic_adapter *adapter) 4517 { 4518 union ibmvnic_crq crq; 4519 4520 memset(&crq, 0, sizeof(crq)); 4521 crq.query_map.first = IBMVNIC_CRQ_CMD; 4522 crq.query_map.cmd = QUERY_MAP; 4523 ibmvnic_send_crq(adapter, &crq); 4524 } 4525 4526 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4527 static void send_query_cap(struct ibmvnic_adapter *adapter) 4528 { 4529 union ibmvnic_crq crq; 4530 int cap_reqs; 4531 4532 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4533 * upfront. When the tasklet receives a response to all of these, it 4534 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4535 */ 4536 cap_reqs = 25; 4537 4538 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4539 4540 memset(&crq, 0, sizeof(crq)); 4541 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4542 crq.query_capability.cmd = QUERY_CAPABILITY; 4543 4544 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4545 ibmvnic_send_crq(adapter, &crq); 4546 cap_reqs--; 4547 4548 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4549 ibmvnic_send_crq(adapter, &crq); 4550 cap_reqs--; 4551 4552 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4553 ibmvnic_send_crq(adapter, &crq); 4554 cap_reqs--; 4555 4556 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4557 ibmvnic_send_crq(adapter, &crq); 4558 cap_reqs--; 4559 4560 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4561 ibmvnic_send_crq(adapter, &crq); 4562 cap_reqs--; 4563 4564 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4565 ibmvnic_send_crq(adapter, &crq); 4566 cap_reqs--; 4567 4568 crq.query_capability.capability = 4569 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4570 ibmvnic_send_crq(adapter, &crq); 4571 cap_reqs--; 4572 4573 crq.query_capability.capability = 4574 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4575 ibmvnic_send_crq(adapter, &crq); 4576 cap_reqs--; 4577 4578 crq.query_capability.capability = 4579 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4580 ibmvnic_send_crq(adapter, &crq); 4581 cap_reqs--; 4582 4583 crq.query_capability.capability = 4584 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4585 ibmvnic_send_crq(adapter, &crq); 4586 cap_reqs--; 4587 4588 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4589 ibmvnic_send_crq(adapter, &crq); 4590 cap_reqs--; 4591 4592 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4593 ibmvnic_send_crq(adapter, &crq); 4594 cap_reqs--; 4595 4596 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4597 ibmvnic_send_crq(adapter, &crq); 4598 cap_reqs--; 4599 4600 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4601 ibmvnic_send_crq(adapter, &crq); 4602 cap_reqs--; 4603 4604 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4605 ibmvnic_send_crq(adapter, &crq); 4606 cap_reqs--; 4607 4608 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4609 ibmvnic_send_crq(adapter, &crq); 4610 cap_reqs--; 4611 4612 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4613 ibmvnic_send_crq(adapter, &crq); 4614 cap_reqs--; 4615 4616 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4617 ibmvnic_send_crq(adapter, &crq); 4618 cap_reqs--; 4619 4620 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4621 ibmvnic_send_crq(adapter, &crq); 4622 cap_reqs--; 4623 4624 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4625 ibmvnic_send_crq(adapter, &crq); 4626 cap_reqs--; 4627 4628 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4629 ibmvnic_send_crq(adapter, &crq); 4630 cap_reqs--; 4631 4632 crq.query_capability.capability = 4633 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4634 ibmvnic_send_crq(adapter, &crq); 4635 cap_reqs--; 4636 4637 crq.query_capability.capability = 4638 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4639 ibmvnic_send_crq(adapter, &crq); 4640 cap_reqs--; 4641 4642 crq.query_capability.capability = 4643 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4644 ibmvnic_send_crq(adapter, &crq); 4645 cap_reqs--; 4646 4647 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4648 4649 ibmvnic_send_crq(adapter, &crq); 4650 cap_reqs--; 4651 4652 /* Keep at end to catch any discrepancy between expected and actual 4653 * CRQs sent. 4654 */ 4655 WARN_ON(cap_reqs != 0); 4656 } 4657 4658 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4659 { 4660 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4661 struct device *dev = &adapter->vdev->dev; 4662 union ibmvnic_crq crq; 4663 4664 adapter->ip_offload_tok = 4665 dma_map_single(dev, 4666 &adapter->ip_offload_buf, 4667 buf_sz, 4668 DMA_FROM_DEVICE); 4669 4670 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4671 if (!firmware_has_feature(FW_FEATURE_CMO)) 4672 dev_err(dev, "Couldn't map offload buffer\n"); 4673 return; 4674 } 4675 4676 memset(&crq, 0, sizeof(crq)); 4677 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4678 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4679 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4680 crq.query_ip_offload.ioba = 4681 cpu_to_be32(adapter->ip_offload_tok); 4682 4683 ibmvnic_send_crq(adapter, &crq); 4684 } 4685 4686 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4687 { 4688 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4689 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4690 struct device *dev = &adapter->vdev->dev; 4691 netdev_features_t old_hw_features = 0; 4692 union ibmvnic_crq crq; 4693 4694 adapter->ip_offload_ctrl_tok = 4695 dma_map_single(dev, 4696 ctrl_buf, 4697 sizeof(adapter->ip_offload_ctrl), 4698 DMA_TO_DEVICE); 4699 4700 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4701 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4702 return; 4703 } 4704 4705 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4706 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4707 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4708 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4709 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4710 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4711 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4712 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4713 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4714 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4715 4716 /* large_rx disabled for now, additional features needed */ 4717 ctrl_buf->large_rx_ipv4 = 0; 4718 ctrl_buf->large_rx_ipv6 = 0; 4719 4720 if (adapter->state != VNIC_PROBING) { 4721 old_hw_features = adapter->netdev->hw_features; 4722 adapter->netdev->hw_features = 0; 4723 } 4724 4725 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4726 4727 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4728 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4729 4730 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4731 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4732 4733 if ((adapter->netdev->features & 4734 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4735 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4736 4737 if (buf->large_tx_ipv4) 4738 adapter->netdev->hw_features |= NETIF_F_TSO; 4739 if (buf->large_tx_ipv6) 4740 adapter->netdev->hw_features |= NETIF_F_TSO6; 4741 4742 if (adapter->state == VNIC_PROBING) { 4743 adapter->netdev->features |= adapter->netdev->hw_features; 4744 } else if (old_hw_features != adapter->netdev->hw_features) { 4745 netdev_features_t tmp = 0; 4746 4747 /* disable features no longer supported */ 4748 adapter->netdev->features &= adapter->netdev->hw_features; 4749 /* turn on features now supported if previously enabled */ 4750 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4751 adapter->netdev->hw_features; 4752 adapter->netdev->features |= 4753 tmp & adapter->netdev->wanted_features; 4754 } 4755 4756 memset(&crq, 0, sizeof(crq)); 4757 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4758 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4759 crq.control_ip_offload.len = 4760 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4761 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4762 ibmvnic_send_crq(adapter, &crq); 4763 } 4764 4765 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4766 struct ibmvnic_adapter *adapter) 4767 { 4768 struct device *dev = &adapter->vdev->dev; 4769 4770 if (crq->get_vpd_size_rsp.rc.code) { 4771 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4772 crq->get_vpd_size_rsp.rc.code); 4773 complete(&adapter->fw_done); 4774 return; 4775 } 4776 4777 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4778 complete(&adapter->fw_done); 4779 } 4780 4781 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4782 struct ibmvnic_adapter *adapter) 4783 { 4784 struct device *dev = &adapter->vdev->dev; 4785 unsigned char *substr = NULL; 4786 u8 fw_level_len = 0; 4787 4788 memset(adapter->fw_version, 0, 32); 4789 4790 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4791 DMA_FROM_DEVICE); 4792 4793 if (crq->get_vpd_rsp.rc.code) { 4794 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4795 crq->get_vpd_rsp.rc.code); 4796 goto complete; 4797 } 4798 4799 /* get the position of the firmware version info 4800 * located after the ASCII 'RM' substring in the buffer 4801 */ 4802 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4803 if (!substr) { 4804 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4805 goto complete; 4806 } 4807 4808 /* get length of firmware level ASCII substring */ 4809 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4810 fw_level_len = *(substr + 2); 4811 } else { 4812 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4813 goto complete; 4814 } 4815 4816 /* copy firmware version string from vpd into adapter */ 4817 if ((substr + 3 + fw_level_len) < 4818 (adapter->vpd->buff + adapter->vpd->len)) { 4819 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4820 } else { 4821 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4822 } 4823 4824 complete: 4825 if (adapter->fw_version[0] == '\0') 4826 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4827 complete(&adapter->fw_done); 4828 } 4829 4830 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4831 { 4832 struct device *dev = &adapter->vdev->dev; 4833 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4834 int i; 4835 4836 dma_unmap_single(dev, adapter->ip_offload_tok, 4837 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4838 4839 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4840 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4841 netdev_dbg(adapter->netdev, "%016lx\n", 4842 ((unsigned long *)(buf))[i]); 4843 4844 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4845 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4846 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4847 buf->tcp_ipv4_chksum); 4848 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4849 buf->tcp_ipv6_chksum); 4850 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4851 buf->udp_ipv4_chksum); 4852 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4853 buf->udp_ipv6_chksum); 4854 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4855 buf->large_tx_ipv4); 4856 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4857 buf->large_tx_ipv6); 4858 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4859 buf->large_rx_ipv4); 4860 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4861 buf->large_rx_ipv6); 4862 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4863 buf->max_ipv4_header_size); 4864 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4865 buf->max_ipv6_header_size); 4866 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4867 buf->max_tcp_header_size); 4868 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4869 buf->max_udp_header_size); 4870 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4871 buf->max_large_tx_size); 4872 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4873 buf->max_large_rx_size); 4874 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4875 buf->ipv6_extension_header); 4876 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4877 buf->tcp_pseudosum_req); 4878 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4879 buf->num_ipv6_ext_headers); 4880 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4881 buf->off_ipv6_ext_headers); 4882 4883 send_control_ip_offload(adapter); 4884 } 4885 4886 static const char *ibmvnic_fw_err_cause(u16 cause) 4887 { 4888 switch (cause) { 4889 case ADAPTER_PROBLEM: 4890 return "adapter problem"; 4891 case BUS_PROBLEM: 4892 return "bus problem"; 4893 case FW_PROBLEM: 4894 return "firmware problem"; 4895 case DD_PROBLEM: 4896 return "device driver problem"; 4897 case EEH_RECOVERY: 4898 return "EEH recovery"; 4899 case FW_UPDATED: 4900 return "firmware updated"; 4901 case LOW_MEMORY: 4902 return "low Memory"; 4903 default: 4904 return "unknown"; 4905 } 4906 } 4907 4908 static void handle_error_indication(union ibmvnic_crq *crq, 4909 struct ibmvnic_adapter *adapter) 4910 { 4911 struct device *dev = &adapter->vdev->dev; 4912 u16 cause; 4913 4914 cause = be16_to_cpu(crq->error_indication.error_cause); 4915 4916 dev_warn_ratelimited(dev, 4917 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4918 crq->error_indication.flags 4919 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4920 ibmvnic_fw_err_cause(cause)); 4921 4922 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4923 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4924 else 4925 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4926 } 4927 4928 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4929 struct ibmvnic_adapter *adapter) 4930 { 4931 struct net_device *netdev = adapter->netdev; 4932 struct device *dev = &adapter->vdev->dev; 4933 long rc; 4934 4935 rc = crq->change_mac_addr_rsp.rc.code; 4936 if (rc) { 4937 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4938 goto out; 4939 } 4940 /* crq->change_mac_addr.mac_addr is the requested one 4941 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4942 */ 4943 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 4944 ether_addr_copy(adapter->mac_addr, 4945 &crq->change_mac_addr_rsp.mac_addr[0]); 4946 out: 4947 complete(&adapter->fw_done); 4948 return rc; 4949 } 4950 4951 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4952 struct ibmvnic_adapter *adapter) 4953 { 4954 struct device *dev = &adapter->vdev->dev; 4955 u64 *req_value; 4956 char *name; 4957 4958 atomic_dec(&adapter->running_cap_crqs); 4959 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 4960 atomic_read(&adapter->running_cap_crqs)); 4961 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4962 case REQ_TX_QUEUES: 4963 req_value = &adapter->req_tx_queues; 4964 name = "tx"; 4965 break; 4966 case REQ_RX_QUEUES: 4967 req_value = &adapter->req_rx_queues; 4968 name = "rx"; 4969 break; 4970 case REQ_RX_ADD_QUEUES: 4971 req_value = &adapter->req_rx_add_queues; 4972 name = "rx_add"; 4973 break; 4974 case REQ_TX_ENTRIES_PER_SUBCRQ: 4975 req_value = &adapter->req_tx_entries_per_subcrq; 4976 name = "tx_entries_per_subcrq"; 4977 break; 4978 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4979 req_value = &adapter->req_rx_add_entries_per_subcrq; 4980 name = "rx_add_entries_per_subcrq"; 4981 break; 4982 case REQ_MTU: 4983 req_value = &adapter->req_mtu; 4984 name = "mtu"; 4985 break; 4986 case PROMISC_REQUESTED: 4987 req_value = &adapter->promisc; 4988 name = "promisc"; 4989 break; 4990 default: 4991 dev_err(dev, "Got invalid cap request rsp %d\n", 4992 crq->request_capability.capability); 4993 return; 4994 } 4995 4996 switch (crq->request_capability_rsp.rc.code) { 4997 case SUCCESS: 4998 break; 4999 case PARTIALSUCCESS: 5000 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5001 *req_value, 5002 (long)be64_to_cpu(crq->request_capability_rsp.number), 5003 name); 5004 5005 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5006 REQ_MTU) { 5007 pr_err("mtu of %llu is not supported. Reverting.\n", 5008 *req_value); 5009 *req_value = adapter->fallback.mtu; 5010 } else { 5011 *req_value = 5012 be64_to_cpu(crq->request_capability_rsp.number); 5013 } 5014 5015 send_request_cap(adapter, 1); 5016 return; 5017 default: 5018 dev_err(dev, "Error %d in request cap rsp\n", 5019 crq->request_capability_rsp.rc.code); 5020 return; 5021 } 5022 5023 /* Done receiving requested capabilities, query IP offload support */ 5024 if (atomic_read(&adapter->running_cap_crqs) == 0) 5025 send_query_ip_offload(adapter); 5026 } 5027 5028 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5029 struct ibmvnic_adapter *adapter) 5030 { 5031 struct device *dev = &adapter->vdev->dev; 5032 struct net_device *netdev = adapter->netdev; 5033 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5034 struct ibmvnic_login_buffer *login = adapter->login_buf; 5035 u64 *tx_handle_array; 5036 u64 *rx_handle_array; 5037 int num_tx_pools; 5038 int num_rx_pools; 5039 u64 *size_array; 5040 int i; 5041 5042 /* CHECK: Test/set of login_pending does not need to be atomic 5043 * because only ibmvnic_tasklet tests/clears this. 5044 */ 5045 if (!adapter->login_pending) { 5046 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5047 return 0; 5048 } 5049 adapter->login_pending = false; 5050 5051 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 5052 DMA_TO_DEVICE); 5053 dma_unmap_single(dev, adapter->login_rsp_buf_token, 5054 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 5055 5056 /* If the number of queues requested can't be allocated by the 5057 * server, the login response will return with code 1. We will need 5058 * to resend the login buffer with fewer queues requested. 5059 */ 5060 if (login_rsp_crq->generic.rc.code) { 5061 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5062 complete(&adapter->init_done); 5063 return 0; 5064 } 5065 5066 if (adapter->failover_pending) { 5067 adapter->init_done_rc = -EAGAIN; 5068 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5069 complete(&adapter->init_done); 5070 /* login response buffer will be released on reset */ 5071 return 0; 5072 } 5073 5074 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5075 5076 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5077 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5078 netdev_dbg(adapter->netdev, "%016lx\n", 5079 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5080 } 5081 5082 /* Sanity checks */ 5083 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5084 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5085 adapter->req_rx_add_queues != 5086 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5087 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5088 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5089 return -EIO; 5090 } 5091 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5092 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5093 /* variable buffer sizes are not supported, so just read the 5094 * first entry. 5095 */ 5096 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5097 5098 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5099 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5100 5101 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5102 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5103 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5104 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5105 5106 for (i = 0; i < num_tx_pools; i++) 5107 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5108 5109 for (i = 0; i < num_rx_pools; i++) 5110 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5111 5112 adapter->num_active_tx_scrqs = num_tx_pools; 5113 adapter->num_active_rx_scrqs = num_rx_pools; 5114 release_login_rsp_buffer(adapter); 5115 release_login_buffer(adapter); 5116 complete(&adapter->init_done); 5117 5118 return 0; 5119 } 5120 5121 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5122 struct ibmvnic_adapter *adapter) 5123 { 5124 struct device *dev = &adapter->vdev->dev; 5125 long rc; 5126 5127 rc = crq->request_unmap_rsp.rc.code; 5128 if (rc) 5129 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5130 } 5131 5132 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5133 struct ibmvnic_adapter *adapter) 5134 { 5135 struct net_device *netdev = adapter->netdev; 5136 struct device *dev = &adapter->vdev->dev; 5137 long rc; 5138 5139 rc = crq->query_map_rsp.rc.code; 5140 if (rc) { 5141 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5142 return; 5143 } 5144 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5145 crq->query_map_rsp.page_size, 5146 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5147 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5148 } 5149 5150 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5151 struct ibmvnic_adapter *adapter) 5152 { 5153 struct net_device *netdev = adapter->netdev; 5154 struct device *dev = &adapter->vdev->dev; 5155 long rc; 5156 5157 atomic_dec(&adapter->running_cap_crqs); 5158 netdev_dbg(netdev, "Outstanding queries: %d\n", 5159 atomic_read(&adapter->running_cap_crqs)); 5160 rc = crq->query_capability.rc.code; 5161 if (rc) { 5162 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5163 goto out; 5164 } 5165 5166 switch (be16_to_cpu(crq->query_capability.capability)) { 5167 case MIN_TX_QUEUES: 5168 adapter->min_tx_queues = 5169 be64_to_cpu(crq->query_capability.number); 5170 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5171 adapter->min_tx_queues); 5172 break; 5173 case MIN_RX_QUEUES: 5174 adapter->min_rx_queues = 5175 be64_to_cpu(crq->query_capability.number); 5176 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5177 adapter->min_rx_queues); 5178 break; 5179 case MIN_RX_ADD_QUEUES: 5180 adapter->min_rx_add_queues = 5181 be64_to_cpu(crq->query_capability.number); 5182 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5183 adapter->min_rx_add_queues); 5184 break; 5185 case MAX_TX_QUEUES: 5186 adapter->max_tx_queues = 5187 be64_to_cpu(crq->query_capability.number); 5188 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5189 adapter->max_tx_queues); 5190 break; 5191 case MAX_RX_QUEUES: 5192 adapter->max_rx_queues = 5193 be64_to_cpu(crq->query_capability.number); 5194 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5195 adapter->max_rx_queues); 5196 break; 5197 case MAX_RX_ADD_QUEUES: 5198 adapter->max_rx_add_queues = 5199 be64_to_cpu(crq->query_capability.number); 5200 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5201 adapter->max_rx_add_queues); 5202 break; 5203 case MIN_TX_ENTRIES_PER_SUBCRQ: 5204 adapter->min_tx_entries_per_subcrq = 5205 be64_to_cpu(crq->query_capability.number); 5206 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5207 adapter->min_tx_entries_per_subcrq); 5208 break; 5209 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5210 adapter->min_rx_add_entries_per_subcrq = 5211 be64_to_cpu(crq->query_capability.number); 5212 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5213 adapter->min_rx_add_entries_per_subcrq); 5214 break; 5215 case MAX_TX_ENTRIES_PER_SUBCRQ: 5216 adapter->max_tx_entries_per_subcrq = 5217 be64_to_cpu(crq->query_capability.number); 5218 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5219 adapter->max_tx_entries_per_subcrq); 5220 break; 5221 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5222 adapter->max_rx_add_entries_per_subcrq = 5223 be64_to_cpu(crq->query_capability.number); 5224 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5225 adapter->max_rx_add_entries_per_subcrq); 5226 break; 5227 case TCP_IP_OFFLOAD: 5228 adapter->tcp_ip_offload = 5229 be64_to_cpu(crq->query_capability.number); 5230 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5231 adapter->tcp_ip_offload); 5232 break; 5233 case PROMISC_SUPPORTED: 5234 adapter->promisc_supported = 5235 be64_to_cpu(crq->query_capability.number); 5236 netdev_dbg(netdev, "promisc_supported = %lld\n", 5237 adapter->promisc_supported); 5238 break; 5239 case MIN_MTU: 5240 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5241 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5242 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5243 break; 5244 case MAX_MTU: 5245 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5246 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5247 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5248 break; 5249 case MAX_MULTICAST_FILTERS: 5250 adapter->max_multicast_filters = 5251 be64_to_cpu(crq->query_capability.number); 5252 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5253 adapter->max_multicast_filters); 5254 break; 5255 case VLAN_HEADER_INSERTION: 5256 adapter->vlan_header_insertion = 5257 be64_to_cpu(crq->query_capability.number); 5258 if (adapter->vlan_header_insertion) 5259 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5260 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5261 adapter->vlan_header_insertion); 5262 break; 5263 case RX_VLAN_HEADER_INSERTION: 5264 adapter->rx_vlan_header_insertion = 5265 be64_to_cpu(crq->query_capability.number); 5266 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5267 adapter->rx_vlan_header_insertion); 5268 break; 5269 case MAX_TX_SG_ENTRIES: 5270 adapter->max_tx_sg_entries = 5271 be64_to_cpu(crq->query_capability.number); 5272 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5273 adapter->max_tx_sg_entries); 5274 break; 5275 case RX_SG_SUPPORTED: 5276 adapter->rx_sg_supported = 5277 be64_to_cpu(crq->query_capability.number); 5278 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5279 adapter->rx_sg_supported); 5280 break; 5281 case OPT_TX_COMP_SUB_QUEUES: 5282 adapter->opt_tx_comp_sub_queues = 5283 be64_to_cpu(crq->query_capability.number); 5284 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5285 adapter->opt_tx_comp_sub_queues); 5286 break; 5287 case OPT_RX_COMP_QUEUES: 5288 adapter->opt_rx_comp_queues = 5289 be64_to_cpu(crq->query_capability.number); 5290 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5291 adapter->opt_rx_comp_queues); 5292 break; 5293 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5294 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5295 be64_to_cpu(crq->query_capability.number); 5296 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5297 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5298 break; 5299 case OPT_TX_ENTRIES_PER_SUBCRQ: 5300 adapter->opt_tx_entries_per_subcrq = 5301 be64_to_cpu(crq->query_capability.number); 5302 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5303 adapter->opt_tx_entries_per_subcrq); 5304 break; 5305 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5306 adapter->opt_rxba_entries_per_subcrq = 5307 be64_to_cpu(crq->query_capability.number); 5308 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5309 adapter->opt_rxba_entries_per_subcrq); 5310 break; 5311 case TX_RX_DESC_REQ: 5312 adapter->tx_rx_desc_req = crq->query_capability.number; 5313 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5314 adapter->tx_rx_desc_req); 5315 break; 5316 5317 default: 5318 netdev_err(netdev, "Got invalid cap rsp %d\n", 5319 crq->query_capability.capability); 5320 } 5321 5322 out: 5323 if (atomic_read(&adapter->running_cap_crqs) == 0) 5324 send_request_cap(adapter, 0); 5325 } 5326 5327 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5328 { 5329 union ibmvnic_crq crq; 5330 int rc; 5331 5332 memset(&crq, 0, sizeof(crq)); 5333 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5334 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5335 5336 mutex_lock(&adapter->fw_lock); 5337 adapter->fw_done_rc = 0; 5338 reinit_completion(&adapter->fw_done); 5339 5340 rc = ibmvnic_send_crq(adapter, &crq); 5341 if (rc) { 5342 mutex_unlock(&adapter->fw_lock); 5343 return rc; 5344 } 5345 5346 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5347 if (rc) { 5348 mutex_unlock(&adapter->fw_lock); 5349 return rc; 5350 } 5351 5352 mutex_unlock(&adapter->fw_lock); 5353 return adapter->fw_done_rc ? -EIO : 0; 5354 } 5355 5356 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5357 struct ibmvnic_adapter *adapter) 5358 { 5359 struct net_device *netdev = adapter->netdev; 5360 int rc; 5361 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5362 5363 rc = crq->query_phys_parms_rsp.rc.code; 5364 if (rc) { 5365 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5366 return rc; 5367 } 5368 switch (rspeed) { 5369 case IBMVNIC_10MBPS: 5370 adapter->speed = SPEED_10; 5371 break; 5372 case IBMVNIC_100MBPS: 5373 adapter->speed = SPEED_100; 5374 break; 5375 case IBMVNIC_1GBPS: 5376 adapter->speed = SPEED_1000; 5377 break; 5378 case IBMVNIC_10GBPS: 5379 adapter->speed = SPEED_10000; 5380 break; 5381 case IBMVNIC_25GBPS: 5382 adapter->speed = SPEED_25000; 5383 break; 5384 case IBMVNIC_40GBPS: 5385 adapter->speed = SPEED_40000; 5386 break; 5387 case IBMVNIC_50GBPS: 5388 adapter->speed = SPEED_50000; 5389 break; 5390 case IBMVNIC_100GBPS: 5391 adapter->speed = SPEED_100000; 5392 break; 5393 case IBMVNIC_200GBPS: 5394 adapter->speed = SPEED_200000; 5395 break; 5396 default: 5397 if (netif_carrier_ok(netdev)) 5398 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5399 adapter->speed = SPEED_UNKNOWN; 5400 } 5401 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5402 adapter->duplex = DUPLEX_FULL; 5403 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5404 adapter->duplex = DUPLEX_HALF; 5405 else 5406 adapter->duplex = DUPLEX_UNKNOWN; 5407 5408 return rc; 5409 } 5410 5411 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5412 struct ibmvnic_adapter *adapter) 5413 { 5414 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5415 struct net_device *netdev = adapter->netdev; 5416 struct device *dev = &adapter->vdev->dev; 5417 u64 *u64_crq = (u64 *)crq; 5418 long rc; 5419 5420 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5421 (unsigned long)cpu_to_be64(u64_crq[0]), 5422 (unsigned long)cpu_to_be64(u64_crq[1])); 5423 switch (gen_crq->first) { 5424 case IBMVNIC_CRQ_INIT_RSP: 5425 switch (gen_crq->cmd) { 5426 case IBMVNIC_CRQ_INIT: 5427 dev_info(dev, "Partner initialized\n"); 5428 adapter->from_passive_init = true; 5429 /* Discard any stale login responses from prev reset. 5430 * CHECK: should we clear even on INIT_COMPLETE? 5431 */ 5432 adapter->login_pending = false; 5433 5434 if (adapter->state == VNIC_DOWN) 5435 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5436 else 5437 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5438 5439 if (rc && rc != -EBUSY) { 5440 /* We were unable to schedule the failover 5441 * reset either because the adapter was still 5442 * probing (eg: during kexec) or we could not 5443 * allocate memory. Clear the failover_pending 5444 * flag since no one else will. We ignore 5445 * EBUSY because it means either FAILOVER reset 5446 * is already scheduled or the adapter is 5447 * being removed. 5448 */ 5449 netdev_err(netdev, 5450 "Error %ld scheduling failover reset\n", 5451 rc); 5452 adapter->failover_pending = false; 5453 } 5454 5455 if (!completion_done(&adapter->init_done)) { 5456 if (!adapter->init_done_rc) 5457 adapter->init_done_rc = -EAGAIN; 5458 complete(&adapter->init_done); 5459 } 5460 5461 break; 5462 case IBMVNIC_CRQ_INIT_COMPLETE: 5463 dev_info(dev, "Partner initialization complete\n"); 5464 adapter->crq.active = true; 5465 send_version_xchg(adapter); 5466 break; 5467 default: 5468 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5469 } 5470 return; 5471 case IBMVNIC_CRQ_XPORT_EVENT: 5472 netif_carrier_off(netdev); 5473 adapter->crq.active = false; 5474 /* terminate any thread waiting for a response 5475 * from the device 5476 */ 5477 if (!completion_done(&adapter->fw_done)) { 5478 adapter->fw_done_rc = -EIO; 5479 complete(&adapter->fw_done); 5480 } 5481 5482 /* if we got here during crq-init, retry crq-init */ 5483 if (!completion_done(&adapter->init_done)) { 5484 adapter->init_done_rc = -EAGAIN; 5485 complete(&adapter->init_done); 5486 } 5487 5488 if (!completion_done(&adapter->stats_done)) 5489 complete(&adapter->stats_done); 5490 if (test_bit(0, &adapter->resetting)) 5491 adapter->force_reset_recovery = true; 5492 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5493 dev_info(dev, "Migrated, re-enabling adapter\n"); 5494 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5495 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5496 dev_info(dev, "Backing device failover detected\n"); 5497 adapter->failover_pending = true; 5498 } else { 5499 /* The adapter lost the connection */ 5500 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5501 gen_crq->cmd); 5502 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5503 } 5504 return; 5505 case IBMVNIC_CRQ_CMD_RSP: 5506 break; 5507 default: 5508 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5509 gen_crq->first); 5510 return; 5511 } 5512 5513 switch (gen_crq->cmd) { 5514 case VERSION_EXCHANGE_RSP: 5515 rc = crq->version_exchange_rsp.rc.code; 5516 if (rc) { 5517 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5518 break; 5519 } 5520 ibmvnic_version = 5521 be16_to_cpu(crq->version_exchange_rsp.version); 5522 dev_info(dev, "Partner protocol version is %d\n", 5523 ibmvnic_version); 5524 send_query_cap(adapter); 5525 break; 5526 case QUERY_CAPABILITY_RSP: 5527 handle_query_cap_rsp(crq, adapter); 5528 break; 5529 case QUERY_MAP_RSP: 5530 handle_query_map_rsp(crq, adapter); 5531 break; 5532 case REQUEST_MAP_RSP: 5533 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5534 complete(&adapter->fw_done); 5535 break; 5536 case REQUEST_UNMAP_RSP: 5537 handle_request_unmap_rsp(crq, adapter); 5538 break; 5539 case REQUEST_CAPABILITY_RSP: 5540 handle_request_cap_rsp(crq, adapter); 5541 break; 5542 case LOGIN_RSP: 5543 netdev_dbg(netdev, "Got Login Response\n"); 5544 handle_login_rsp(crq, adapter); 5545 break; 5546 case LOGICAL_LINK_STATE_RSP: 5547 netdev_dbg(netdev, 5548 "Got Logical Link State Response, state: %d rc: %d\n", 5549 crq->logical_link_state_rsp.link_state, 5550 crq->logical_link_state_rsp.rc.code); 5551 adapter->logical_link_state = 5552 crq->logical_link_state_rsp.link_state; 5553 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5554 complete(&adapter->init_done); 5555 break; 5556 case LINK_STATE_INDICATION: 5557 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5558 adapter->phys_link_state = 5559 crq->link_state_indication.phys_link_state; 5560 adapter->logical_link_state = 5561 crq->link_state_indication.logical_link_state; 5562 if (adapter->phys_link_state && adapter->logical_link_state) 5563 netif_carrier_on(netdev); 5564 else 5565 netif_carrier_off(netdev); 5566 break; 5567 case CHANGE_MAC_ADDR_RSP: 5568 netdev_dbg(netdev, "Got MAC address change Response\n"); 5569 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5570 break; 5571 case ERROR_INDICATION: 5572 netdev_dbg(netdev, "Got Error Indication\n"); 5573 handle_error_indication(crq, adapter); 5574 break; 5575 case REQUEST_STATISTICS_RSP: 5576 netdev_dbg(netdev, "Got Statistics Response\n"); 5577 complete(&adapter->stats_done); 5578 break; 5579 case QUERY_IP_OFFLOAD_RSP: 5580 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5581 handle_query_ip_offload_rsp(adapter); 5582 break; 5583 case MULTICAST_CTRL_RSP: 5584 netdev_dbg(netdev, "Got multicast control Response\n"); 5585 break; 5586 case CONTROL_IP_OFFLOAD_RSP: 5587 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5588 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5589 sizeof(adapter->ip_offload_ctrl), 5590 DMA_TO_DEVICE); 5591 complete(&adapter->init_done); 5592 break; 5593 case COLLECT_FW_TRACE_RSP: 5594 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5595 complete(&adapter->fw_done); 5596 break; 5597 case GET_VPD_SIZE_RSP: 5598 handle_vpd_size_rsp(crq, adapter); 5599 break; 5600 case GET_VPD_RSP: 5601 handle_vpd_rsp(crq, adapter); 5602 break; 5603 case QUERY_PHYS_PARMS_RSP: 5604 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5605 complete(&adapter->fw_done); 5606 break; 5607 default: 5608 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5609 gen_crq->cmd); 5610 } 5611 } 5612 5613 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5614 { 5615 struct ibmvnic_adapter *adapter = instance; 5616 5617 tasklet_schedule(&adapter->tasklet); 5618 return IRQ_HANDLED; 5619 } 5620 5621 static void ibmvnic_tasklet(struct tasklet_struct *t) 5622 { 5623 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5624 struct ibmvnic_crq_queue *queue = &adapter->crq; 5625 union ibmvnic_crq *crq; 5626 unsigned long flags; 5627 5628 spin_lock_irqsave(&queue->lock, flags); 5629 5630 /* Pull all the valid messages off the CRQ */ 5631 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5632 /* This barrier makes sure ibmvnic_next_crq()'s 5633 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5634 * before ibmvnic_handle_crq()'s 5635 * switch(gen_crq->first) and switch(gen_crq->cmd). 5636 */ 5637 dma_rmb(); 5638 ibmvnic_handle_crq(crq, adapter); 5639 crq->generic.first = 0; 5640 } 5641 5642 spin_unlock_irqrestore(&queue->lock, flags); 5643 } 5644 5645 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5646 { 5647 struct vio_dev *vdev = adapter->vdev; 5648 int rc; 5649 5650 do { 5651 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5652 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5653 5654 if (rc) 5655 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5656 5657 return rc; 5658 } 5659 5660 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5661 { 5662 struct ibmvnic_crq_queue *crq = &adapter->crq; 5663 struct device *dev = &adapter->vdev->dev; 5664 struct vio_dev *vdev = adapter->vdev; 5665 int rc; 5666 5667 /* Close the CRQ */ 5668 do { 5669 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5670 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5671 5672 /* Clean out the queue */ 5673 if (!crq->msgs) 5674 return -EINVAL; 5675 5676 memset(crq->msgs, 0, PAGE_SIZE); 5677 crq->cur = 0; 5678 crq->active = false; 5679 5680 /* And re-open it again */ 5681 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5682 crq->msg_token, PAGE_SIZE); 5683 5684 if (rc == H_CLOSED) 5685 /* Adapter is good, but other end is not ready */ 5686 dev_warn(dev, "Partner adapter not ready\n"); 5687 else if (rc != 0) 5688 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5689 5690 return rc; 5691 } 5692 5693 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5694 { 5695 struct ibmvnic_crq_queue *crq = &adapter->crq; 5696 struct vio_dev *vdev = adapter->vdev; 5697 long rc; 5698 5699 if (!crq->msgs) 5700 return; 5701 5702 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5703 free_irq(vdev->irq, adapter); 5704 tasklet_kill(&adapter->tasklet); 5705 do { 5706 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5707 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5708 5709 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5710 DMA_BIDIRECTIONAL); 5711 free_page((unsigned long)crq->msgs); 5712 crq->msgs = NULL; 5713 crq->active = false; 5714 } 5715 5716 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5717 { 5718 struct ibmvnic_crq_queue *crq = &adapter->crq; 5719 struct device *dev = &adapter->vdev->dev; 5720 struct vio_dev *vdev = adapter->vdev; 5721 int rc, retrc = -ENOMEM; 5722 5723 if (crq->msgs) 5724 return 0; 5725 5726 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5727 /* Should we allocate more than one page? */ 5728 5729 if (!crq->msgs) 5730 return -ENOMEM; 5731 5732 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5733 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5734 DMA_BIDIRECTIONAL); 5735 if (dma_mapping_error(dev, crq->msg_token)) 5736 goto map_failed; 5737 5738 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5739 crq->msg_token, PAGE_SIZE); 5740 5741 if (rc == H_RESOURCE) 5742 /* maybe kexecing and resource is busy. try a reset */ 5743 rc = ibmvnic_reset_crq(adapter); 5744 retrc = rc; 5745 5746 if (rc == H_CLOSED) { 5747 dev_warn(dev, "Partner adapter not ready\n"); 5748 } else if (rc) { 5749 dev_warn(dev, "Error %d opening adapter\n", rc); 5750 goto reg_crq_failed; 5751 } 5752 5753 retrc = 0; 5754 5755 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5756 5757 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5758 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5759 adapter->vdev->unit_address); 5760 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5761 if (rc) { 5762 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5763 vdev->irq, rc); 5764 goto req_irq_failed; 5765 } 5766 5767 rc = vio_enable_interrupts(vdev); 5768 if (rc) { 5769 dev_err(dev, "Error %d enabling interrupts\n", rc); 5770 goto req_irq_failed; 5771 } 5772 5773 crq->cur = 0; 5774 spin_lock_init(&crq->lock); 5775 5776 /* process any CRQs that were queued before we enabled interrupts */ 5777 tasklet_schedule(&adapter->tasklet); 5778 5779 return retrc; 5780 5781 req_irq_failed: 5782 tasklet_kill(&adapter->tasklet); 5783 do { 5784 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5785 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5786 reg_crq_failed: 5787 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5788 map_failed: 5789 free_page((unsigned long)crq->msgs); 5790 crq->msgs = NULL; 5791 return retrc; 5792 } 5793 5794 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5795 { 5796 struct device *dev = &adapter->vdev->dev; 5797 unsigned long timeout = msecs_to_jiffies(20000); 5798 u64 old_num_rx_queues = adapter->req_rx_queues; 5799 u64 old_num_tx_queues = adapter->req_tx_queues; 5800 int rc; 5801 5802 adapter->from_passive_init = false; 5803 5804 rc = ibmvnic_send_crq_init(adapter); 5805 if (rc) { 5806 dev_err(dev, "Send crq init failed with error %d\n", rc); 5807 return rc; 5808 } 5809 5810 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5811 dev_err(dev, "Initialization sequence timed out\n"); 5812 return -ETIMEDOUT; 5813 } 5814 5815 if (adapter->init_done_rc) { 5816 release_crq_queue(adapter); 5817 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 5818 return adapter->init_done_rc; 5819 } 5820 5821 if (adapter->from_passive_init) { 5822 adapter->state = VNIC_OPEN; 5823 adapter->from_passive_init = false; 5824 dev_err(dev, "CRQ-init failed, passive-init\n"); 5825 return -EINVAL; 5826 } 5827 5828 if (reset && 5829 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5830 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5831 if (adapter->req_rx_queues != old_num_rx_queues || 5832 adapter->req_tx_queues != old_num_tx_queues) { 5833 release_sub_crqs(adapter, 0); 5834 rc = init_sub_crqs(adapter); 5835 } else { 5836 rc = reset_sub_crq_queues(adapter); 5837 } 5838 } else { 5839 rc = init_sub_crqs(adapter); 5840 } 5841 5842 if (rc) { 5843 dev_err(dev, "Initialization of sub crqs failed\n"); 5844 release_crq_queue(adapter); 5845 return rc; 5846 } 5847 5848 rc = init_sub_crq_irqs(adapter); 5849 if (rc) { 5850 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5851 release_crq_queue(adapter); 5852 } 5853 5854 return rc; 5855 } 5856 5857 static struct device_attribute dev_attr_failover; 5858 5859 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5860 { 5861 struct ibmvnic_adapter *adapter; 5862 struct net_device *netdev; 5863 unsigned char *mac_addr_p; 5864 unsigned long flags; 5865 bool init_success; 5866 int rc; 5867 5868 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5869 dev->unit_address); 5870 5871 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5872 VETH_MAC_ADDR, NULL); 5873 if (!mac_addr_p) { 5874 dev_err(&dev->dev, 5875 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5876 __FILE__, __LINE__); 5877 return 0; 5878 } 5879 5880 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5881 IBMVNIC_MAX_QUEUES); 5882 if (!netdev) 5883 return -ENOMEM; 5884 5885 adapter = netdev_priv(netdev); 5886 adapter->state = VNIC_PROBING; 5887 dev_set_drvdata(&dev->dev, netdev); 5888 adapter->vdev = dev; 5889 adapter->netdev = netdev; 5890 adapter->login_pending = false; 5891 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 5892 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 5893 bitmap_set(adapter->map_ids, 0, 1); 5894 5895 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5896 eth_hw_addr_set(netdev, adapter->mac_addr); 5897 netdev->irq = dev->irq; 5898 netdev->netdev_ops = &ibmvnic_netdev_ops; 5899 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5900 SET_NETDEV_DEV(netdev, &dev->dev); 5901 5902 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5903 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5904 __ibmvnic_delayed_reset); 5905 INIT_LIST_HEAD(&adapter->rwi_list); 5906 spin_lock_init(&adapter->rwi_lock); 5907 spin_lock_init(&adapter->state_lock); 5908 mutex_init(&adapter->fw_lock); 5909 init_completion(&adapter->probe_done); 5910 init_completion(&adapter->init_done); 5911 init_completion(&adapter->fw_done); 5912 init_completion(&adapter->reset_done); 5913 init_completion(&adapter->stats_done); 5914 clear_bit(0, &adapter->resetting); 5915 adapter->prev_rx_buf_sz = 0; 5916 adapter->prev_mtu = 0; 5917 5918 init_success = false; 5919 do { 5920 reinit_init_done(adapter); 5921 5922 /* clear any failovers we got in the previous pass 5923 * since we are reinitializing the CRQ 5924 */ 5925 adapter->failover_pending = false; 5926 5927 /* If we had already initialized CRQ, we may have one or 5928 * more resets queued already. Discard those and release 5929 * the CRQ before initializing the CRQ again. 5930 */ 5931 release_crq_queue(adapter); 5932 5933 /* Since we are still in PROBING state, __ibmvnic_reset() 5934 * will not access the ->rwi_list and since we released CRQ, 5935 * we won't get _new_ transport events. But there maybe an 5936 * ongoing ibmvnic_reset() call. So serialize access to 5937 * rwi_list. If we win the race, ibvmnic_reset() could add 5938 * a reset after we purged but thats ok - we just may end 5939 * up with an extra reset (i.e similar to having two or more 5940 * resets in the queue at once). 5941 * CHECK. 5942 */ 5943 spin_lock_irqsave(&adapter->rwi_lock, flags); 5944 flush_reset_queue(adapter); 5945 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 5946 5947 rc = init_crq_queue(adapter); 5948 if (rc) { 5949 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5950 rc); 5951 goto ibmvnic_init_fail; 5952 } 5953 5954 rc = ibmvnic_reset_init(adapter, false); 5955 } while (rc == -EAGAIN); 5956 5957 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5958 * partner is not ready. CRQ is not active. When the partner becomes 5959 * ready, we will do the passive init reset. 5960 */ 5961 5962 if (!rc) 5963 init_success = true; 5964 5965 rc = init_stats_buffers(adapter); 5966 if (rc) 5967 goto ibmvnic_init_fail; 5968 5969 rc = init_stats_token(adapter); 5970 if (rc) 5971 goto ibmvnic_stats_fail; 5972 5973 rc = device_create_file(&dev->dev, &dev_attr_failover); 5974 if (rc) 5975 goto ibmvnic_dev_file_err; 5976 5977 netif_carrier_off(netdev); 5978 5979 if (init_success) { 5980 adapter->state = VNIC_PROBED; 5981 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5982 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5983 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5984 } else { 5985 adapter->state = VNIC_DOWN; 5986 } 5987 5988 adapter->wait_for_reset = false; 5989 adapter->last_reset_time = jiffies; 5990 5991 rc = register_netdev(netdev); 5992 if (rc) { 5993 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5994 goto ibmvnic_register_fail; 5995 } 5996 dev_info(&dev->dev, "ibmvnic registered\n"); 5997 5998 complete(&adapter->probe_done); 5999 6000 return 0; 6001 6002 ibmvnic_register_fail: 6003 device_remove_file(&dev->dev, &dev_attr_failover); 6004 6005 ibmvnic_dev_file_err: 6006 release_stats_token(adapter); 6007 6008 ibmvnic_stats_fail: 6009 release_stats_buffers(adapter); 6010 6011 ibmvnic_init_fail: 6012 release_sub_crqs(adapter, 1); 6013 release_crq_queue(adapter); 6014 6015 /* cleanup worker thread after releasing CRQ so we don't get 6016 * transport events (i.e new work items for the worker thread). 6017 */ 6018 adapter->state = VNIC_REMOVING; 6019 complete(&adapter->probe_done); 6020 flush_work(&adapter->ibmvnic_reset); 6021 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6022 6023 flush_reset_queue(adapter); 6024 6025 mutex_destroy(&adapter->fw_lock); 6026 free_netdev(netdev); 6027 6028 return rc; 6029 } 6030 6031 static void ibmvnic_remove(struct vio_dev *dev) 6032 { 6033 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6034 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6035 unsigned long flags; 6036 6037 spin_lock_irqsave(&adapter->state_lock, flags); 6038 6039 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6040 * finish. Then, set the state to REMOVING to prevent it from 6041 * scheduling any more work and to have reset functions ignore 6042 * any resets that have already been scheduled. Drop the lock 6043 * after setting state, so __ibmvnic_reset() which is called 6044 * from the flush_work() below, can make progress. 6045 */ 6046 spin_lock(&adapter->rwi_lock); 6047 adapter->state = VNIC_REMOVING; 6048 spin_unlock(&adapter->rwi_lock); 6049 6050 spin_unlock_irqrestore(&adapter->state_lock, flags); 6051 6052 flush_work(&adapter->ibmvnic_reset); 6053 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6054 6055 rtnl_lock(); 6056 unregister_netdevice(netdev); 6057 6058 release_resources(adapter); 6059 release_rx_pools(adapter); 6060 release_tx_pools(adapter); 6061 release_sub_crqs(adapter, 1); 6062 release_crq_queue(adapter); 6063 6064 release_stats_token(adapter); 6065 release_stats_buffers(adapter); 6066 6067 adapter->state = VNIC_REMOVED; 6068 6069 rtnl_unlock(); 6070 mutex_destroy(&adapter->fw_lock); 6071 device_remove_file(&dev->dev, &dev_attr_failover); 6072 free_netdev(netdev); 6073 dev_set_drvdata(&dev->dev, NULL); 6074 } 6075 6076 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6077 const char *buf, size_t count) 6078 { 6079 struct net_device *netdev = dev_get_drvdata(dev); 6080 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6081 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6082 __be64 session_token; 6083 long rc; 6084 6085 if (!sysfs_streq(buf, "1")) 6086 return -EINVAL; 6087 6088 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6089 H_GET_SESSION_TOKEN, 0, 0, 0); 6090 if (rc) { 6091 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6092 rc); 6093 goto last_resort; 6094 } 6095 6096 session_token = (__be64)retbuf[0]; 6097 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6098 be64_to_cpu(session_token)); 6099 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6100 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6101 if (rc) { 6102 netdev_err(netdev, 6103 "H_VIOCTL initiated failover failed, rc %ld\n", 6104 rc); 6105 goto last_resort; 6106 } 6107 6108 return count; 6109 6110 last_resort: 6111 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6112 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6113 6114 return count; 6115 } 6116 static DEVICE_ATTR_WO(failover); 6117 6118 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6119 { 6120 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6121 struct ibmvnic_adapter *adapter; 6122 struct iommu_table *tbl; 6123 unsigned long ret = 0; 6124 int i; 6125 6126 tbl = get_iommu_table_base(&vdev->dev); 6127 6128 /* netdev inits at probe time along with the structures we need below*/ 6129 if (!netdev) 6130 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6131 6132 adapter = netdev_priv(netdev); 6133 6134 ret += PAGE_SIZE; /* the crq message queue */ 6135 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6136 6137 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6138 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6139 6140 for (i = 0; i < adapter->num_active_rx_pools; i++) 6141 ret += adapter->rx_pool[i].size * 6142 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6143 6144 return ret; 6145 } 6146 6147 static int ibmvnic_resume(struct device *dev) 6148 { 6149 struct net_device *netdev = dev_get_drvdata(dev); 6150 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6151 6152 if (adapter->state != VNIC_OPEN) 6153 return 0; 6154 6155 tasklet_schedule(&adapter->tasklet); 6156 6157 return 0; 6158 } 6159 6160 static const struct vio_device_id ibmvnic_device_table[] = { 6161 {"network", "IBM,vnic"}, 6162 {"", "" } 6163 }; 6164 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6165 6166 static const struct dev_pm_ops ibmvnic_pm_ops = { 6167 .resume = ibmvnic_resume 6168 }; 6169 6170 static struct vio_driver ibmvnic_driver = { 6171 .id_table = ibmvnic_device_table, 6172 .probe = ibmvnic_probe, 6173 .remove = ibmvnic_remove, 6174 .get_desired_dma = ibmvnic_get_desired_dma, 6175 .name = ibmvnic_driver_name, 6176 .pm = &ibmvnic_pm_ops, 6177 }; 6178 6179 /* module functions */ 6180 static int __init ibmvnic_module_init(void) 6181 { 6182 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6183 IBMVNIC_DRIVER_VERSION); 6184 6185 return vio_register_driver(&ibmvnic_driver); 6186 } 6187 6188 static void __exit ibmvnic_module_exit(void) 6189 { 6190 vio_unregister_driver(&ibmvnic_driver); 6191 } 6192 6193 module_init(ibmvnic_module_init); 6194 module_exit(ibmvnic_module_exit); 6195