1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 110 struct ibmvnic_sub_crq_queue *tx_scrq); 111 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 112 struct ibmvnic_long_term_buff *ltb); 113 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 114 115 struct ibmvnic_stat { 116 char name[ETH_GSTRING_LEN]; 117 int offset; 118 }; 119 120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 121 offsetof(struct ibmvnic_statistics, stat)) 122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 123 124 static const struct ibmvnic_stat ibmvnic_stats[] = { 125 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 126 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 127 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 128 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 129 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 130 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 131 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 132 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 133 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 134 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 135 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 136 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 137 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 138 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 139 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 140 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 141 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 142 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 143 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 144 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 145 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 146 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 147 }; 148 149 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 150 { 151 union ibmvnic_crq crq; 152 153 memset(&crq, 0, sizeof(crq)); 154 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 155 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 156 157 return ibmvnic_send_crq(adapter, &crq); 158 } 159 160 static int send_version_xchg(struct ibmvnic_adapter *adapter) 161 { 162 union ibmvnic_crq crq; 163 164 memset(&crq, 0, sizeof(crq)); 165 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 166 crq.version_exchange.cmd = VERSION_EXCHANGE; 167 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 168 169 return ibmvnic_send_crq(adapter, &crq); 170 } 171 172 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 173 unsigned long length, unsigned long *number, 174 unsigned long *irq) 175 { 176 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 177 long rc; 178 179 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 180 *number = retbuf[0]; 181 *irq = retbuf[1]; 182 183 return rc; 184 } 185 186 /** 187 * ibmvnic_wait_for_completion - Check device state and wait for completion 188 * @adapter: private device data 189 * @comp_done: completion structure to wait for 190 * @timeout: time to wait in milliseconds 191 * 192 * Wait for a completion signal or until the timeout limit is reached 193 * while checking that the device is still active. 194 */ 195 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 196 struct completion *comp_done, 197 unsigned long timeout) 198 { 199 struct net_device *netdev; 200 unsigned long div_timeout; 201 u8 retry; 202 203 netdev = adapter->netdev; 204 retry = 5; 205 div_timeout = msecs_to_jiffies(timeout / retry); 206 while (true) { 207 if (!adapter->crq.active) { 208 netdev_err(netdev, "Device down!\n"); 209 return -ENODEV; 210 } 211 if (!retry--) 212 break; 213 if (wait_for_completion_timeout(comp_done, div_timeout)) 214 return 0; 215 } 216 netdev_err(netdev, "Operation timed out.\n"); 217 return -ETIMEDOUT; 218 } 219 220 /** 221 * reuse_ltb() - Check if a long term buffer can be reused 222 * @ltb: The long term buffer to be checked 223 * @size: The size of the long term buffer. 224 * 225 * An LTB can be reused unless its size has changed. 226 * 227 * Return: Return true if the LTB can be reused, false otherwise. 228 */ 229 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 230 { 231 return (ltb->buff && ltb->size == size); 232 } 233 234 /** 235 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 236 * 237 * @adapter: ibmvnic adapter associated to the LTB 238 * @ltb: container object for the LTB 239 * @size: size of the LTB 240 * 241 * Allocate an LTB of the specified size and notify VIOS. 242 * 243 * If the given @ltb already has the correct size, reuse it. Otherwise if 244 * its non-NULL, free it. Then allocate a new one of the correct size. 245 * Notify the VIOS either way since we may now be working with a new VIOS. 246 * 247 * Allocating larger chunks of memory during resets, specially LPM or under 248 * low memory situations can cause resets to fail/timeout and for LPAR to 249 * lose connectivity. So hold onto the LTB even if we fail to communicate 250 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 251 * 252 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 253 * a negative value otherwise. 254 */ 255 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 256 struct ibmvnic_long_term_buff *ltb, int size) 257 { 258 struct device *dev = &adapter->vdev->dev; 259 int rc; 260 261 if (!reuse_ltb(ltb, size)) { 262 dev_dbg(dev, 263 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 264 ltb->size, size); 265 free_long_term_buff(adapter, ltb); 266 } 267 268 if (ltb->buff) { 269 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 270 ltb->map_id, ltb->size); 271 } else { 272 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 273 GFP_KERNEL); 274 if (!ltb->buff) { 275 dev_err(dev, "Couldn't alloc long term buffer\n"); 276 return -ENOMEM; 277 } 278 ltb->size = size; 279 280 ltb->map_id = find_first_zero_bit(adapter->map_ids, 281 MAX_MAP_ID); 282 bitmap_set(adapter->map_ids, ltb->map_id, 1); 283 284 dev_dbg(dev, 285 "Allocated new LTB [map %d, size 0x%llx]\n", 286 ltb->map_id, ltb->size); 287 } 288 289 /* Ensure ltb is zeroed - specially when reusing it. */ 290 memset(ltb->buff, 0, ltb->size); 291 292 mutex_lock(&adapter->fw_lock); 293 adapter->fw_done_rc = 0; 294 reinit_completion(&adapter->fw_done); 295 296 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 297 if (rc) { 298 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 299 goto out; 300 } 301 302 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 303 if (rc) { 304 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 305 rc); 306 goto out; 307 } 308 309 if (adapter->fw_done_rc) { 310 dev_err(dev, "Couldn't map LTB, rc = %d\n", 311 adapter->fw_done_rc); 312 rc = -EIO; 313 goto out; 314 } 315 rc = 0; 316 out: 317 /* don't free LTB on communication error - see function header */ 318 mutex_unlock(&adapter->fw_lock); 319 return rc; 320 } 321 322 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 323 struct ibmvnic_long_term_buff *ltb) 324 { 325 struct device *dev = &adapter->vdev->dev; 326 327 if (!ltb->buff) 328 return; 329 330 /* VIOS automatically unmaps the long term buffer at remote 331 * end for the following resets: 332 * FAILOVER, MOBILITY, TIMEOUT. 333 */ 334 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 335 adapter->reset_reason != VNIC_RESET_MOBILITY && 336 adapter->reset_reason != VNIC_RESET_TIMEOUT) 337 send_request_unmap(adapter, ltb->map_id); 338 339 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 340 341 ltb->buff = NULL; 342 /* mark this map_id free */ 343 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 344 ltb->map_id = 0; 345 } 346 347 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 348 { 349 int i; 350 351 for (i = 0; i < adapter->num_active_rx_pools; i++) 352 adapter->rx_pool[i].active = 0; 353 } 354 355 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 356 struct ibmvnic_rx_pool *pool) 357 { 358 int count = pool->size - atomic_read(&pool->available); 359 u64 handle = adapter->rx_scrq[pool->index]->handle; 360 struct device *dev = &adapter->vdev->dev; 361 struct ibmvnic_ind_xmit_queue *ind_bufp; 362 struct ibmvnic_sub_crq_queue *rx_scrq; 363 union sub_crq *sub_crq; 364 int buffers_added = 0; 365 unsigned long lpar_rc; 366 struct sk_buff *skb; 367 unsigned int offset; 368 dma_addr_t dma_addr; 369 unsigned char *dst; 370 int shift = 0; 371 int index; 372 int i; 373 374 if (!pool->active) 375 return; 376 377 rx_scrq = adapter->rx_scrq[pool->index]; 378 ind_bufp = &rx_scrq->ind_buf; 379 380 /* netdev_skb_alloc() could have failed after we saved a few skbs 381 * in the indir_buf and we would not have sent them to VIOS yet. 382 * To account for them, start the loop at ind_bufp->index rather 383 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 384 * be 0. 385 */ 386 for (i = ind_bufp->index; i < count; ++i) { 387 index = pool->free_map[pool->next_free]; 388 389 /* We maybe reusing the skb from earlier resets. Allocate 390 * only if necessary. But since the LTB may have changed 391 * during reset (see init_rx_pools()), update LTB below 392 * even if reusing skb. 393 */ 394 skb = pool->rx_buff[index].skb; 395 if (!skb) { 396 skb = netdev_alloc_skb(adapter->netdev, 397 pool->buff_size); 398 if (!skb) { 399 dev_err(dev, "Couldn't replenish rx buff\n"); 400 adapter->replenish_no_mem++; 401 break; 402 } 403 } 404 405 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 406 pool->next_free = (pool->next_free + 1) % pool->size; 407 408 /* Copy the skb to the long term mapped DMA buffer */ 409 offset = index * pool->buff_size; 410 dst = pool->long_term_buff.buff + offset; 411 memset(dst, 0, pool->buff_size); 412 dma_addr = pool->long_term_buff.addr + offset; 413 414 /* add the skb to an rx_buff in the pool */ 415 pool->rx_buff[index].data = dst; 416 pool->rx_buff[index].dma = dma_addr; 417 pool->rx_buff[index].skb = skb; 418 pool->rx_buff[index].pool_index = pool->index; 419 pool->rx_buff[index].size = pool->buff_size; 420 421 /* queue the rx_buff for the next send_subcrq_indirect */ 422 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 423 memset(sub_crq, 0, sizeof(*sub_crq)); 424 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 425 sub_crq->rx_add.correlator = 426 cpu_to_be64((u64)&pool->rx_buff[index]); 427 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 428 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 429 430 /* The length field of the sCRQ is defined to be 24 bits so the 431 * buffer size needs to be left shifted by a byte before it is 432 * converted to big endian to prevent the last byte from being 433 * truncated. 434 */ 435 #ifdef __LITTLE_ENDIAN__ 436 shift = 8; 437 #endif 438 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 439 440 /* if send_subcrq_indirect queue is full, flush to VIOS */ 441 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 442 i == count - 1) { 443 lpar_rc = 444 send_subcrq_indirect(adapter, handle, 445 (u64)ind_bufp->indir_dma, 446 (u64)ind_bufp->index); 447 if (lpar_rc != H_SUCCESS) 448 goto failure; 449 buffers_added += ind_bufp->index; 450 adapter->replenish_add_buff_success += ind_bufp->index; 451 ind_bufp->index = 0; 452 } 453 } 454 atomic_add(buffers_added, &pool->available); 455 return; 456 457 failure: 458 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 459 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 460 for (i = ind_bufp->index - 1; i >= 0; --i) { 461 struct ibmvnic_rx_buff *rx_buff; 462 463 pool->next_free = pool->next_free == 0 ? 464 pool->size - 1 : pool->next_free - 1; 465 sub_crq = &ind_bufp->indir_arr[i]; 466 rx_buff = (struct ibmvnic_rx_buff *) 467 be64_to_cpu(sub_crq->rx_add.correlator); 468 index = (int)(rx_buff - pool->rx_buff); 469 pool->free_map[pool->next_free] = index; 470 dev_kfree_skb_any(pool->rx_buff[index].skb); 471 pool->rx_buff[index].skb = NULL; 472 } 473 adapter->replenish_add_buff_failure += ind_bufp->index; 474 atomic_add(buffers_added, &pool->available); 475 ind_bufp->index = 0; 476 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 477 /* Disable buffer pool replenishment and report carrier off if 478 * queue is closed or pending failover. 479 * Firmware guarantees that a signal will be sent to the 480 * driver, triggering a reset. 481 */ 482 deactivate_rx_pools(adapter); 483 netif_carrier_off(adapter->netdev); 484 } 485 } 486 487 static void replenish_pools(struct ibmvnic_adapter *adapter) 488 { 489 int i; 490 491 adapter->replenish_task_cycles++; 492 for (i = 0; i < adapter->num_active_rx_pools; i++) { 493 if (adapter->rx_pool[i].active) 494 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 495 } 496 497 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 498 } 499 500 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 501 { 502 kfree(adapter->tx_stats_buffers); 503 kfree(adapter->rx_stats_buffers); 504 adapter->tx_stats_buffers = NULL; 505 adapter->rx_stats_buffers = NULL; 506 } 507 508 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 509 { 510 adapter->tx_stats_buffers = 511 kcalloc(IBMVNIC_MAX_QUEUES, 512 sizeof(struct ibmvnic_tx_queue_stats), 513 GFP_KERNEL); 514 if (!adapter->tx_stats_buffers) 515 return -ENOMEM; 516 517 adapter->rx_stats_buffers = 518 kcalloc(IBMVNIC_MAX_QUEUES, 519 sizeof(struct ibmvnic_rx_queue_stats), 520 GFP_KERNEL); 521 if (!adapter->rx_stats_buffers) 522 return -ENOMEM; 523 524 return 0; 525 } 526 527 static void release_stats_token(struct ibmvnic_adapter *adapter) 528 { 529 struct device *dev = &adapter->vdev->dev; 530 531 if (!adapter->stats_token) 532 return; 533 534 dma_unmap_single(dev, adapter->stats_token, 535 sizeof(struct ibmvnic_statistics), 536 DMA_FROM_DEVICE); 537 adapter->stats_token = 0; 538 } 539 540 static int init_stats_token(struct ibmvnic_adapter *adapter) 541 { 542 struct device *dev = &adapter->vdev->dev; 543 dma_addr_t stok; 544 int rc; 545 546 stok = dma_map_single(dev, &adapter->stats, 547 sizeof(struct ibmvnic_statistics), 548 DMA_FROM_DEVICE); 549 rc = dma_mapping_error(dev, stok); 550 if (rc) { 551 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 552 return rc; 553 } 554 555 adapter->stats_token = stok; 556 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 557 return 0; 558 } 559 560 /** 561 * release_rx_pools() - Release any rx pools attached to @adapter. 562 * @adapter: ibmvnic adapter 563 * 564 * Safe to call this multiple times - even if no pools are attached. 565 */ 566 static void release_rx_pools(struct ibmvnic_adapter *adapter) 567 { 568 struct ibmvnic_rx_pool *rx_pool; 569 int i, j; 570 571 if (!adapter->rx_pool) 572 return; 573 574 for (i = 0; i < adapter->num_active_rx_pools; i++) { 575 rx_pool = &adapter->rx_pool[i]; 576 577 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 578 579 kfree(rx_pool->free_map); 580 581 free_long_term_buff(adapter, &rx_pool->long_term_buff); 582 583 if (!rx_pool->rx_buff) 584 continue; 585 586 for (j = 0; j < rx_pool->size; j++) { 587 if (rx_pool->rx_buff[j].skb) { 588 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 589 rx_pool->rx_buff[j].skb = NULL; 590 } 591 } 592 593 kfree(rx_pool->rx_buff); 594 } 595 596 kfree(adapter->rx_pool); 597 adapter->rx_pool = NULL; 598 adapter->num_active_rx_pools = 0; 599 adapter->prev_rx_pool_size = 0; 600 } 601 602 /** 603 * reuse_rx_pools() - Check if the existing rx pools can be reused. 604 * @adapter: ibmvnic adapter 605 * 606 * Check if the existing rx pools in the adapter can be reused. The 607 * pools can be reused if the pool parameters (number of pools, 608 * number of buffers in the pool and size of each buffer) have not 609 * changed. 610 * 611 * NOTE: This assumes that all pools have the same number of buffers 612 * which is the case currently. If that changes, we must fix this. 613 * 614 * Return: true if the rx pools can be reused, false otherwise. 615 */ 616 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 617 { 618 u64 old_num_pools, new_num_pools; 619 u64 old_pool_size, new_pool_size; 620 u64 old_buff_size, new_buff_size; 621 622 if (!adapter->rx_pool) 623 return false; 624 625 old_num_pools = adapter->num_active_rx_pools; 626 new_num_pools = adapter->req_rx_queues; 627 628 old_pool_size = adapter->prev_rx_pool_size; 629 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 630 631 old_buff_size = adapter->prev_rx_buf_sz; 632 new_buff_size = adapter->cur_rx_buf_sz; 633 634 if (old_buff_size != new_buff_size || 635 old_num_pools != new_num_pools || 636 old_pool_size != new_pool_size) 637 return false; 638 639 return true; 640 } 641 642 /** 643 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 644 * @netdev: net device associated with the vnic interface 645 * 646 * Initialize the set of receiver pools in the ibmvnic adapter associated 647 * with the net_device @netdev. If possible, reuse the existing rx pools. 648 * Otherwise free any existing pools and allocate a new set of pools 649 * before initializing them. 650 * 651 * Return: 0 on success and negative value on error. 652 */ 653 static int init_rx_pools(struct net_device *netdev) 654 { 655 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 656 struct device *dev = &adapter->vdev->dev; 657 struct ibmvnic_rx_pool *rx_pool; 658 u64 num_pools; 659 u64 pool_size; /* # of buffers in one pool */ 660 u64 buff_size; 661 int i, j, rc; 662 663 pool_size = adapter->req_rx_add_entries_per_subcrq; 664 num_pools = adapter->req_rx_queues; 665 buff_size = adapter->cur_rx_buf_sz; 666 667 if (reuse_rx_pools(adapter)) { 668 dev_dbg(dev, "Reusing rx pools\n"); 669 goto update_ltb; 670 } 671 672 /* Allocate/populate the pools. */ 673 release_rx_pools(adapter); 674 675 adapter->rx_pool = kcalloc(num_pools, 676 sizeof(struct ibmvnic_rx_pool), 677 GFP_KERNEL); 678 if (!adapter->rx_pool) { 679 dev_err(dev, "Failed to allocate rx pools\n"); 680 return -ENOMEM; 681 } 682 683 /* Set num_active_rx_pools early. If we fail below after partial 684 * allocation, release_rx_pools() will know how many to look for. 685 */ 686 adapter->num_active_rx_pools = num_pools; 687 688 for (i = 0; i < num_pools; i++) { 689 rx_pool = &adapter->rx_pool[i]; 690 691 netdev_dbg(adapter->netdev, 692 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 693 i, pool_size, buff_size); 694 695 rx_pool->size = pool_size; 696 rx_pool->index = i; 697 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 698 699 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 700 GFP_KERNEL); 701 if (!rx_pool->free_map) { 702 dev_err(dev, "Couldn't alloc free_map %d\n", i); 703 rc = -ENOMEM; 704 goto out_release; 705 } 706 707 rx_pool->rx_buff = kcalloc(rx_pool->size, 708 sizeof(struct ibmvnic_rx_buff), 709 GFP_KERNEL); 710 if (!rx_pool->rx_buff) { 711 dev_err(dev, "Couldn't alloc rx buffers\n"); 712 rc = -ENOMEM; 713 goto out_release; 714 } 715 } 716 717 adapter->prev_rx_pool_size = pool_size; 718 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 719 720 update_ltb: 721 for (i = 0; i < num_pools; i++) { 722 rx_pool = &adapter->rx_pool[i]; 723 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 724 i, rx_pool->size, rx_pool->buff_size); 725 726 rc = alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 727 rx_pool->size * rx_pool->buff_size); 728 if (rc) 729 goto out; 730 731 for (j = 0; j < rx_pool->size; ++j) { 732 struct ibmvnic_rx_buff *rx_buff; 733 734 rx_pool->free_map[j] = j; 735 736 /* NOTE: Don't clear rx_buff->skb here - will leak 737 * memory! replenish_rx_pool() will reuse skbs or 738 * allocate as necessary. 739 */ 740 rx_buff = &rx_pool->rx_buff[j]; 741 rx_buff->dma = 0; 742 rx_buff->data = 0; 743 rx_buff->size = 0; 744 rx_buff->pool_index = 0; 745 } 746 747 /* Mark pool "empty" so replenish_rx_pools() will 748 * update the LTB info for each buffer 749 */ 750 atomic_set(&rx_pool->available, 0); 751 rx_pool->next_alloc = 0; 752 rx_pool->next_free = 0; 753 /* replenish_rx_pool() may have called deactivate_rx_pools() 754 * on failover. Ensure pool is active now. 755 */ 756 rx_pool->active = 1; 757 } 758 return 0; 759 out_release: 760 release_rx_pools(adapter); 761 out: 762 /* We failed to allocate one or more LTBs or map them on the VIOS. 763 * Hold onto the pools and any LTBs that we did allocate/map. 764 */ 765 return rc; 766 } 767 768 static void release_vpd_data(struct ibmvnic_adapter *adapter) 769 { 770 if (!adapter->vpd) 771 return; 772 773 kfree(adapter->vpd->buff); 774 kfree(adapter->vpd); 775 776 adapter->vpd = NULL; 777 } 778 779 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 780 struct ibmvnic_tx_pool *tx_pool) 781 { 782 kfree(tx_pool->tx_buff); 783 kfree(tx_pool->free_map); 784 free_long_term_buff(adapter, &tx_pool->long_term_buff); 785 } 786 787 /** 788 * release_tx_pools() - Release any tx pools attached to @adapter. 789 * @adapter: ibmvnic adapter 790 * 791 * Safe to call this multiple times - even if no pools are attached. 792 */ 793 static void release_tx_pools(struct ibmvnic_adapter *adapter) 794 { 795 int i; 796 797 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 798 * both NULL or both non-NULL. So we only need to check one. 799 */ 800 if (!adapter->tx_pool) 801 return; 802 803 for (i = 0; i < adapter->num_active_tx_pools; i++) { 804 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 805 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 806 } 807 808 kfree(adapter->tx_pool); 809 adapter->tx_pool = NULL; 810 kfree(adapter->tso_pool); 811 adapter->tso_pool = NULL; 812 adapter->num_active_tx_pools = 0; 813 adapter->prev_tx_pool_size = 0; 814 } 815 816 static int init_one_tx_pool(struct net_device *netdev, 817 struct ibmvnic_tx_pool *tx_pool, 818 int pool_size, int buf_size) 819 { 820 int i; 821 822 tx_pool->tx_buff = kcalloc(pool_size, 823 sizeof(struct ibmvnic_tx_buff), 824 GFP_KERNEL); 825 if (!tx_pool->tx_buff) 826 return -ENOMEM; 827 828 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 829 if (!tx_pool->free_map) { 830 kfree(tx_pool->tx_buff); 831 tx_pool->tx_buff = NULL; 832 return -ENOMEM; 833 } 834 835 for (i = 0; i < pool_size; i++) 836 tx_pool->free_map[i] = i; 837 838 tx_pool->consumer_index = 0; 839 tx_pool->producer_index = 0; 840 tx_pool->num_buffers = pool_size; 841 tx_pool->buf_size = buf_size; 842 843 return 0; 844 } 845 846 /** 847 * reuse_tx_pools() - Check if the existing tx pools can be reused. 848 * @adapter: ibmvnic adapter 849 * 850 * Check if the existing tx pools in the adapter can be reused. The 851 * pools can be reused if the pool parameters (number of pools, 852 * number of buffers in the pool and mtu) have not changed. 853 * 854 * NOTE: This assumes that all pools have the same number of buffers 855 * which is the case currently. If that changes, we must fix this. 856 * 857 * Return: true if the tx pools can be reused, false otherwise. 858 */ 859 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 860 { 861 u64 old_num_pools, new_num_pools; 862 u64 old_pool_size, new_pool_size; 863 u64 old_mtu, new_mtu; 864 865 if (!adapter->tx_pool) 866 return false; 867 868 old_num_pools = adapter->num_active_tx_pools; 869 new_num_pools = adapter->num_active_tx_scrqs; 870 old_pool_size = adapter->prev_tx_pool_size; 871 new_pool_size = adapter->req_tx_entries_per_subcrq; 872 old_mtu = adapter->prev_mtu; 873 new_mtu = adapter->req_mtu; 874 875 if (old_mtu != new_mtu || 876 old_num_pools != new_num_pools || 877 old_pool_size != new_pool_size) 878 return false; 879 880 return true; 881 } 882 883 /** 884 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 885 * @netdev: net device associated with the vnic interface 886 * 887 * Initialize the set of transmit pools in the ibmvnic adapter associated 888 * with the net_device @netdev. If possible, reuse the existing tx pools. 889 * Otherwise free any existing pools and allocate a new set of pools 890 * before initializing them. 891 * 892 * Return: 0 on success and negative value on error. 893 */ 894 static int init_tx_pools(struct net_device *netdev) 895 { 896 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 897 struct device *dev = &adapter->vdev->dev; 898 int num_pools; 899 u64 pool_size; /* # of buffers in pool */ 900 u64 buff_size; 901 int i, j, rc; 902 903 num_pools = adapter->req_tx_queues; 904 905 /* We must notify the VIOS about the LTB on all resets - but we only 906 * need to alloc/populate pools if either the number of buffers or 907 * size of each buffer in the pool has changed. 908 */ 909 if (reuse_tx_pools(adapter)) { 910 netdev_dbg(netdev, "Reusing tx pools\n"); 911 goto update_ltb; 912 } 913 914 /* Allocate/populate the pools. */ 915 release_tx_pools(adapter); 916 917 pool_size = adapter->req_tx_entries_per_subcrq; 918 num_pools = adapter->num_active_tx_scrqs; 919 920 adapter->tx_pool = kcalloc(num_pools, 921 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 922 if (!adapter->tx_pool) 923 return -ENOMEM; 924 925 adapter->tso_pool = kcalloc(num_pools, 926 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 927 /* To simplify release_tx_pools() ensure that ->tx_pool and 928 * ->tso_pool are either both NULL or both non-NULL. 929 */ 930 if (!adapter->tso_pool) { 931 kfree(adapter->tx_pool); 932 adapter->tx_pool = NULL; 933 return -ENOMEM; 934 } 935 936 /* Set num_active_tx_pools early. If we fail below after partial 937 * allocation, release_tx_pools() will know how many to look for. 938 */ 939 adapter->num_active_tx_pools = num_pools; 940 941 buff_size = adapter->req_mtu + VLAN_HLEN; 942 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 943 944 for (i = 0; i < num_pools; i++) { 945 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 946 i, adapter->req_tx_entries_per_subcrq, buff_size); 947 948 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 949 pool_size, buff_size); 950 if (rc) 951 goto out_release; 952 953 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 954 IBMVNIC_TSO_BUFS, 955 IBMVNIC_TSO_BUF_SZ); 956 if (rc) 957 goto out_release; 958 } 959 960 adapter->prev_tx_pool_size = pool_size; 961 adapter->prev_mtu = adapter->req_mtu; 962 963 update_ltb: 964 /* NOTE: All tx_pools have the same number of buffers (which is 965 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 966 * buffers (see calls init_one_tx_pool() for these). 967 * For consistency, we use tx_pool->num_buffers and 968 * tso_pool->num_buffers below. 969 */ 970 rc = -1; 971 for (i = 0; i < num_pools; i++) { 972 struct ibmvnic_tx_pool *tso_pool; 973 struct ibmvnic_tx_pool *tx_pool; 974 u32 ltb_size; 975 976 tx_pool = &adapter->tx_pool[i]; 977 ltb_size = tx_pool->num_buffers * tx_pool->buf_size; 978 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 979 ltb_size)) 980 goto out; 981 982 dev_dbg(dev, "Updated LTB for tx pool %d [%p, %d, %d]\n", 983 i, tx_pool->long_term_buff.buff, 984 tx_pool->num_buffers, tx_pool->buf_size); 985 986 tx_pool->consumer_index = 0; 987 tx_pool->producer_index = 0; 988 989 for (j = 0; j < tx_pool->num_buffers; j++) 990 tx_pool->free_map[j] = j; 991 992 tso_pool = &adapter->tso_pool[i]; 993 ltb_size = tso_pool->num_buffers * tso_pool->buf_size; 994 if (alloc_long_term_buff(adapter, &tso_pool->long_term_buff, 995 ltb_size)) 996 goto out; 997 998 dev_dbg(dev, "Updated LTB for tso pool %d [%p, %d, %d]\n", 999 i, tso_pool->long_term_buff.buff, 1000 tso_pool->num_buffers, tso_pool->buf_size); 1001 1002 tso_pool->consumer_index = 0; 1003 tso_pool->producer_index = 0; 1004 1005 for (j = 0; j < tso_pool->num_buffers; j++) 1006 tso_pool->free_map[j] = j; 1007 } 1008 1009 return 0; 1010 out_release: 1011 release_tx_pools(adapter); 1012 out: 1013 /* We failed to allocate one or more LTBs or map them on the VIOS. 1014 * Hold onto the pools and any LTBs that we did allocate/map. 1015 */ 1016 return rc; 1017 } 1018 1019 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1020 { 1021 int i; 1022 1023 if (adapter->napi_enabled) 1024 return; 1025 1026 for (i = 0; i < adapter->req_rx_queues; i++) 1027 napi_enable(&adapter->napi[i]); 1028 1029 adapter->napi_enabled = true; 1030 } 1031 1032 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1033 { 1034 int i; 1035 1036 if (!adapter->napi_enabled) 1037 return; 1038 1039 for (i = 0; i < adapter->req_rx_queues; i++) { 1040 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1041 napi_disable(&adapter->napi[i]); 1042 } 1043 1044 adapter->napi_enabled = false; 1045 } 1046 1047 static int init_napi(struct ibmvnic_adapter *adapter) 1048 { 1049 int i; 1050 1051 adapter->napi = kcalloc(adapter->req_rx_queues, 1052 sizeof(struct napi_struct), GFP_KERNEL); 1053 if (!adapter->napi) 1054 return -ENOMEM; 1055 1056 for (i = 0; i < adapter->req_rx_queues; i++) { 1057 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1058 netif_napi_add(adapter->netdev, &adapter->napi[i], 1059 ibmvnic_poll, NAPI_POLL_WEIGHT); 1060 } 1061 1062 adapter->num_active_rx_napi = adapter->req_rx_queues; 1063 return 0; 1064 } 1065 1066 static void release_napi(struct ibmvnic_adapter *adapter) 1067 { 1068 int i; 1069 1070 if (!adapter->napi) 1071 return; 1072 1073 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1074 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1075 netif_napi_del(&adapter->napi[i]); 1076 } 1077 1078 kfree(adapter->napi); 1079 adapter->napi = NULL; 1080 adapter->num_active_rx_napi = 0; 1081 adapter->napi_enabled = false; 1082 } 1083 1084 static const char *adapter_state_to_string(enum vnic_state state) 1085 { 1086 switch (state) { 1087 case VNIC_PROBING: 1088 return "PROBING"; 1089 case VNIC_PROBED: 1090 return "PROBED"; 1091 case VNIC_OPENING: 1092 return "OPENING"; 1093 case VNIC_OPEN: 1094 return "OPEN"; 1095 case VNIC_CLOSING: 1096 return "CLOSING"; 1097 case VNIC_CLOSED: 1098 return "CLOSED"; 1099 case VNIC_REMOVING: 1100 return "REMOVING"; 1101 case VNIC_REMOVED: 1102 return "REMOVED"; 1103 case VNIC_DOWN: 1104 return "DOWN"; 1105 } 1106 return "UNKNOWN"; 1107 } 1108 1109 static int ibmvnic_login(struct net_device *netdev) 1110 { 1111 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1112 unsigned long timeout = msecs_to_jiffies(20000); 1113 int retry_count = 0; 1114 int retries = 10; 1115 bool retry; 1116 int rc; 1117 1118 do { 1119 retry = false; 1120 if (retry_count > retries) { 1121 netdev_warn(netdev, "Login attempts exceeded\n"); 1122 return -EACCES; 1123 } 1124 1125 adapter->init_done_rc = 0; 1126 reinit_completion(&adapter->init_done); 1127 rc = send_login(adapter); 1128 if (rc) 1129 return rc; 1130 1131 if (!wait_for_completion_timeout(&adapter->init_done, 1132 timeout)) { 1133 netdev_warn(netdev, "Login timed out, retrying...\n"); 1134 retry = true; 1135 adapter->init_done_rc = 0; 1136 retry_count++; 1137 continue; 1138 } 1139 1140 if (adapter->init_done_rc == ABORTED) { 1141 netdev_warn(netdev, "Login aborted, retrying...\n"); 1142 retry = true; 1143 adapter->init_done_rc = 0; 1144 retry_count++; 1145 /* FW or device may be busy, so 1146 * wait a bit before retrying login 1147 */ 1148 msleep(500); 1149 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1150 retry_count++; 1151 release_sub_crqs(adapter, 1); 1152 1153 retry = true; 1154 netdev_dbg(netdev, 1155 "Received partial success, retrying...\n"); 1156 adapter->init_done_rc = 0; 1157 reinit_completion(&adapter->init_done); 1158 send_query_cap(adapter); 1159 if (!wait_for_completion_timeout(&adapter->init_done, 1160 timeout)) { 1161 netdev_warn(netdev, 1162 "Capabilities query timed out\n"); 1163 return -ETIMEDOUT; 1164 } 1165 1166 rc = init_sub_crqs(adapter); 1167 if (rc) { 1168 netdev_warn(netdev, 1169 "SCRQ initialization failed\n"); 1170 return rc; 1171 } 1172 1173 rc = init_sub_crq_irqs(adapter); 1174 if (rc) { 1175 netdev_warn(netdev, 1176 "SCRQ irq initialization failed\n"); 1177 return rc; 1178 } 1179 } else if (adapter->init_done_rc) { 1180 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1181 adapter->init_done_rc); 1182 return -EIO; 1183 } 1184 } while (retry); 1185 1186 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1187 1188 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1189 return 0; 1190 } 1191 1192 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1193 { 1194 kfree(adapter->login_buf); 1195 adapter->login_buf = NULL; 1196 } 1197 1198 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1199 { 1200 kfree(adapter->login_rsp_buf); 1201 adapter->login_rsp_buf = NULL; 1202 } 1203 1204 static void release_resources(struct ibmvnic_adapter *adapter) 1205 { 1206 release_vpd_data(adapter); 1207 1208 release_napi(adapter); 1209 release_login_buffer(adapter); 1210 release_login_rsp_buffer(adapter); 1211 } 1212 1213 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1214 { 1215 struct net_device *netdev = adapter->netdev; 1216 unsigned long timeout = msecs_to_jiffies(20000); 1217 union ibmvnic_crq crq; 1218 bool resend; 1219 int rc; 1220 1221 netdev_dbg(netdev, "setting link state %d\n", link_state); 1222 1223 memset(&crq, 0, sizeof(crq)); 1224 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1225 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1226 crq.logical_link_state.link_state = link_state; 1227 1228 do { 1229 resend = false; 1230 1231 reinit_completion(&adapter->init_done); 1232 rc = ibmvnic_send_crq(adapter, &crq); 1233 if (rc) { 1234 netdev_err(netdev, "Failed to set link state\n"); 1235 return rc; 1236 } 1237 1238 if (!wait_for_completion_timeout(&adapter->init_done, 1239 timeout)) { 1240 netdev_err(netdev, "timeout setting link state\n"); 1241 return -ETIMEDOUT; 1242 } 1243 1244 if (adapter->init_done_rc == PARTIALSUCCESS) { 1245 /* Partuial success, delay and re-send */ 1246 mdelay(1000); 1247 resend = true; 1248 } else if (adapter->init_done_rc) { 1249 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1250 adapter->init_done_rc); 1251 return adapter->init_done_rc; 1252 } 1253 } while (resend); 1254 1255 return 0; 1256 } 1257 1258 static int set_real_num_queues(struct net_device *netdev) 1259 { 1260 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1261 int rc; 1262 1263 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1264 adapter->req_tx_queues, adapter->req_rx_queues); 1265 1266 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1267 if (rc) { 1268 netdev_err(netdev, "failed to set the number of tx queues\n"); 1269 return rc; 1270 } 1271 1272 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1273 if (rc) 1274 netdev_err(netdev, "failed to set the number of rx queues\n"); 1275 1276 return rc; 1277 } 1278 1279 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1280 { 1281 struct device *dev = &adapter->vdev->dev; 1282 union ibmvnic_crq crq; 1283 int len = 0; 1284 int rc; 1285 1286 if (adapter->vpd->buff) 1287 len = adapter->vpd->len; 1288 1289 mutex_lock(&adapter->fw_lock); 1290 adapter->fw_done_rc = 0; 1291 reinit_completion(&adapter->fw_done); 1292 1293 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1294 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1295 rc = ibmvnic_send_crq(adapter, &crq); 1296 if (rc) { 1297 mutex_unlock(&adapter->fw_lock); 1298 return rc; 1299 } 1300 1301 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1302 if (rc) { 1303 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1304 mutex_unlock(&adapter->fw_lock); 1305 return rc; 1306 } 1307 mutex_unlock(&adapter->fw_lock); 1308 1309 if (!adapter->vpd->len) 1310 return -ENODATA; 1311 1312 if (!adapter->vpd->buff) 1313 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1314 else if (adapter->vpd->len != len) 1315 adapter->vpd->buff = 1316 krealloc(adapter->vpd->buff, 1317 adapter->vpd->len, GFP_KERNEL); 1318 1319 if (!adapter->vpd->buff) { 1320 dev_err(dev, "Could allocate VPD buffer\n"); 1321 return -ENOMEM; 1322 } 1323 1324 adapter->vpd->dma_addr = 1325 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1326 DMA_FROM_DEVICE); 1327 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1328 dev_err(dev, "Could not map VPD buffer\n"); 1329 kfree(adapter->vpd->buff); 1330 adapter->vpd->buff = NULL; 1331 return -ENOMEM; 1332 } 1333 1334 mutex_lock(&adapter->fw_lock); 1335 adapter->fw_done_rc = 0; 1336 reinit_completion(&adapter->fw_done); 1337 1338 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1339 crq.get_vpd.cmd = GET_VPD; 1340 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1341 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1342 rc = ibmvnic_send_crq(adapter, &crq); 1343 if (rc) { 1344 kfree(adapter->vpd->buff); 1345 adapter->vpd->buff = NULL; 1346 mutex_unlock(&adapter->fw_lock); 1347 return rc; 1348 } 1349 1350 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1351 if (rc) { 1352 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1353 kfree(adapter->vpd->buff); 1354 adapter->vpd->buff = NULL; 1355 mutex_unlock(&adapter->fw_lock); 1356 return rc; 1357 } 1358 1359 mutex_unlock(&adapter->fw_lock); 1360 return 0; 1361 } 1362 1363 static int init_resources(struct ibmvnic_adapter *adapter) 1364 { 1365 struct net_device *netdev = adapter->netdev; 1366 int rc; 1367 1368 rc = set_real_num_queues(netdev); 1369 if (rc) 1370 return rc; 1371 1372 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1373 if (!adapter->vpd) 1374 return -ENOMEM; 1375 1376 /* Vital Product Data (VPD) */ 1377 rc = ibmvnic_get_vpd(adapter); 1378 if (rc) { 1379 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1380 return rc; 1381 } 1382 1383 rc = init_napi(adapter); 1384 if (rc) 1385 return rc; 1386 1387 send_query_map(adapter); 1388 1389 rc = init_rx_pools(netdev); 1390 if (rc) 1391 return rc; 1392 1393 rc = init_tx_pools(netdev); 1394 return rc; 1395 } 1396 1397 static int __ibmvnic_open(struct net_device *netdev) 1398 { 1399 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1400 enum vnic_state prev_state = adapter->state; 1401 int i, rc; 1402 1403 adapter->state = VNIC_OPENING; 1404 replenish_pools(adapter); 1405 ibmvnic_napi_enable(adapter); 1406 1407 /* We're ready to receive frames, enable the sub-crq interrupts and 1408 * set the logical link state to up 1409 */ 1410 for (i = 0; i < adapter->req_rx_queues; i++) { 1411 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1412 if (prev_state == VNIC_CLOSED) 1413 enable_irq(adapter->rx_scrq[i]->irq); 1414 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1415 } 1416 1417 for (i = 0; i < adapter->req_tx_queues; i++) { 1418 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1419 if (prev_state == VNIC_CLOSED) 1420 enable_irq(adapter->tx_scrq[i]->irq); 1421 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1422 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1423 } 1424 1425 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1426 if (rc) { 1427 ibmvnic_napi_disable(adapter); 1428 ibmvnic_disable_irqs(adapter); 1429 return rc; 1430 } 1431 1432 netif_tx_start_all_queues(netdev); 1433 1434 if (prev_state == VNIC_CLOSED) { 1435 for (i = 0; i < adapter->req_rx_queues; i++) 1436 napi_schedule(&adapter->napi[i]); 1437 } 1438 1439 adapter->state = VNIC_OPEN; 1440 return rc; 1441 } 1442 1443 static int ibmvnic_open(struct net_device *netdev) 1444 { 1445 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1446 int rc; 1447 1448 ASSERT_RTNL(); 1449 1450 /* If device failover is pending or we are about to reset, just set 1451 * device state and return. Device operation will be handled by reset 1452 * routine. 1453 * 1454 * It should be safe to overwrite the adapter->state here. Since 1455 * we hold the rtnl, either the reset has not actually started or 1456 * the rtnl got dropped during the set_link_state() in do_reset(). 1457 * In the former case, no one else is changing the state (again we 1458 * have the rtnl) and in the latter case, do_reset() will detect and 1459 * honor our setting below. 1460 */ 1461 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1462 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1463 adapter_state_to_string(adapter->state), 1464 adapter->failover_pending); 1465 adapter->state = VNIC_OPEN; 1466 rc = 0; 1467 goto out; 1468 } 1469 1470 if (adapter->state != VNIC_CLOSED) { 1471 rc = ibmvnic_login(netdev); 1472 if (rc) 1473 goto out; 1474 1475 rc = init_resources(adapter); 1476 if (rc) { 1477 netdev_err(netdev, "failed to initialize resources\n"); 1478 goto out; 1479 } 1480 } 1481 1482 rc = __ibmvnic_open(netdev); 1483 1484 out: 1485 /* If open failed and there is a pending failover or in-progress reset, 1486 * set device state and return. Device operation will be handled by 1487 * reset routine. See also comments above regarding rtnl. 1488 */ 1489 if (rc && 1490 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1491 adapter->state = VNIC_OPEN; 1492 rc = 0; 1493 } 1494 1495 if (rc) { 1496 release_resources(adapter); 1497 release_rx_pools(adapter); 1498 release_tx_pools(adapter); 1499 } 1500 1501 return rc; 1502 } 1503 1504 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1505 { 1506 struct ibmvnic_rx_pool *rx_pool; 1507 struct ibmvnic_rx_buff *rx_buff; 1508 u64 rx_entries; 1509 int rx_scrqs; 1510 int i, j; 1511 1512 if (!adapter->rx_pool) 1513 return; 1514 1515 rx_scrqs = adapter->num_active_rx_pools; 1516 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1517 1518 /* Free any remaining skbs in the rx buffer pools */ 1519 for (i = 0; i < rx_scrqs; i++) { 1520 rx_pool = &adapter->rx_pool[i]; 1521 if (!rx_pool || !rx_pool->rx_buff) 1522 continue; 1523 1524 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1525 for (j = 0; j < rx_entries; j++) { 1526 rx_buff = &rx_pool->rx_buff[j]; 1527 if (rx_buff && rx_buff->skb) { 1528 dev_kfree_skb_any(rx_buff->skb); 1529 rx_buff->skb = NULL; 1530 } 1531 } 1532 } 1533 } 1534 1535 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1536 struct ibmvnic_tx_pool *tx_pool) 1537 { 1538 struct ibmvnic_tx_buff *tx_buff; 1539 u64 tx_entries; 1540 int i; 1541 1542 if (!tx_pool || !tx_pool->tx_buff) 1543 return; 1544 1545 tx_entries = tx_pool->num_buffers; 1546 1547 for (i = 0; i < tx_entries; i++) { 1548 tx_buff = &tx_pool->tx_buff[i]; 1549 if (tx_buff && tx_buff->skb) { 1550 dev_kfree_skb_any(tx_buff->skb); 1551 tx_buff->skb = NULL; 1552 } 1553 } 1554 } 1555 1556 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1557 { 1558 int tx_scrqs; 1559 int i; 1560 1561 if (!adapter->tx_pool || !adapter->tso_pool) 1562 return; 1563 1564 tx_scrqs = adapter->num_active_tx_pools; 1565 1566 /* Free any remaining skbs in the tx buffer pools */ 1567 for (i = 0; i < tx_scrqs; i++) { 1568 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1569 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1570 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1571 } 1572 } 1573 1574 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1575 { 1576 struct net_device *netdev = adapter->netdev; 1577 int i; 1578 1579 if (adapter->tx_scrq) { 1580 for (i = 0; i < adapter->req_tx_queues; i++) 1581 if (adapter->tx_scrq[i]->irq) { 1582 netdev_dbg(netdev, 1583 "Disabling tx_scrq[%d] irq\n", i); 1584 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1585 disable_irq(adapter->tx_scrq[i]->irq); 1586 } 1587 } 1588 1589 if (adapter->rx_scrq) { 1590 for (i = 0; i < adapter->req_rx_queues; i++) { 1591 if (adapter->rx_scrq[i]->irq) { 1592 netdev_dbg(netdev, 1593 "Disabling rx_scrq[%d] irq\n", i); 1594 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1595 disable_irq(adapter->rx_scrq[i]->irq); 1596 } 1597 } 1598 } 1599 } 1600 1601 static void ibmvnic_cleanup(struct net_device *netdev) 1602 { 1603 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1604 1605 /* ensure that transmissions are stopped if called by do_reset */ 1606 if (test_bit(0, &adapter->resetting)) 1607 netif_tx_disable(netdev); 1608 else 1609 netif_tx_stop_all_queues(netdev); 1610 1611 ibmvnic_napi_disable(adapter); 1612 ibmvnic_disable_irqs(adapter); 1613 } 1614 1615 static int __ibmvnic_close(struct net_device *netdev) 1616 { 1617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1618 int rc = 0; 1619 1620 adapter->state = VNIC_CLOSING; 1621 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1622 adapter->state = VNIC_CLOSED; 1623 return rc; 1624 } 1625 1626 static int ibmvnic_close(struct net_device *netdev) 1627 { 1628 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1629 int rc; 1630 1631 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1632 adapter_state_to_string(adapter->state), 1633 adapter->failover_pending, 1634 adapter->force_reset_recovery); 1635 1636 /* If device failover is pending, just set device state and return. 1637 * Device operation will be handled by reset routine. 1638 */ 1639 if (adapter->failover_pending) { 1640 adapter->state = VNIC_CLOSED; 1641 return 0; 1642 } 1643 1644 rc = __ibmvnic_close(netdev); 1645 ibmvnic_cleanup(netdev); 1646 clean_rx_pools(adapter); 1647 clean_tx_pools(adapter); 1648 1649 return rc; 1650 } 1651 1652 /** 1653 * build_hdr_data - creates L2/L3/L4 header data buffer 1654 * @hdr_field: bitfield determining needed headers 1655 * @skb: socket buffer 1656 * @hdr_len: array of header lengths 1657 * @hdr_data: buffer to write the header to 1658 * 1659 * Reads hdr_field to determine which headers are needed by firmware. 1660 * Builds a buffer containing these headers. Saves individual header 1661 * lengths and total buffer length to be used to build descriptors. 1662 */ 1663 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1664 int *hdr_len, u8 *hdr_data) 1665 { 1666 int len = 0; 1667 u8 *hdr; 1668 1669 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1670 hdr_len[0] = sizeof(struct vlan_ethhdr); 1671 else 1672 hdr_len[0] = sizeof(struct ethhdr); 1673 1674 if (skb->protocol == htons(ETH_P_IP)) { 1675 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1676 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1677 hdr_len[2] = tcp_hdrlen(skb); 1678 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1679 hdr_len[2] = sizeof(struct udphdr); 1680 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1681 hdr_len[1] = sizeof(struct ipv6hdr); 1682 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1683 hdr_len[2] = tcp_hdrlen(skb); 1684 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1685 hdr_len[2] = sizeof(struct udphdr); 1686 } else if (skb->protocol == htons(ETH_P_ARP)) { 1687 hdr_len[1] = arp_hdr_len(skb->dev); 1688 hdr_len[2] = 0; 1689 } 1690 1691 memset(hdr_data, 0, 120); 1692 if ((hdr_field >> 6) & 1) { 1693 hdr = skb_mac_header(skb); 1694 memcpy(hdr_data, hdr, hdr_len[0]); 1695 len += hdr_len[0]; 1696 } 1697 1698 if ((hdr_field >> 5) & 1) { 1699 hdr = skb_network_header(skb); 1700 memcpy(hdr_data + len, hdr, hdr_len[1]); 1701 len += hdr_len[1]; 1702 } 1703 1704 if ((hdr_field >> 4) & 1) { 1705 hdr = skb_transport_header(skb); 1706 memcpy(hdr_data + len, hdr, hdr_len[2]); 1707 len += hdr_len[2]; 1708 } 1709 return len; 1710 } 1711 1712 /** 1713 * create_hdr_descs - create header and header extension descriptors 1714 * @hdr_field: bitfield determining needed headers 1715 * @hdr_data: buffer containing header data 1716 * @len: length of data buffer 1717 * @hdr_len: array of individual header lengths 1718 * @scrq_arr: descriptor array 1719 * 1720 * Creates header and, if needed, header extension descriptors and 1721 * places them in a descriptor array, scrq_arr 1722 */ 1723 1724 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1725 union sub_crq *scrq_arr) 1726 { 1727 union sub_crq hdr_desc; 1728 int tmp_len = len; 1729 int num_descs = 0; 1730 u8 *data, *cur; 1731 int tmp; 1732 1733 while (tmp_len > 0) { 1734 cur = hdr_data + len - tmp_len; 1735 1736 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1737 if (cur != hdr_data) { 1738 data = hdr_desc.hdr_ext.data; 1739 tmp = tmp_len > 29 ? 29 : tmp_len; 1740 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1741 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1742 hdr_desc.hdr_ext.len = tmp; 1743 } else { 1744 data = hdr_desc.hdr.data; 1745 tmp = tmp_len > 24 ? 24 : tmp_len; 1746 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1747 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1748 hdr_desc.hdr.len = tmp; 1749 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1750 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1751 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1752 hdr_desc.hdr.flag = hdr_field << 1; 1753 } 1754 memcpy(data, cur, tmp); 1755 tmp_len -= tmp; 1756 *scrq_arr = hdr_desc; 1757 scrq_arr++; 1758 num_descs++; 1759 } 1760 1761 return num_descs; 1762 } 1763 1764 /** 1765 * build_hdr_descs_arr - build a header descriptor array 1766 * @skb: tx socket buffer 1767 * @indir_arr: indirect array 1768 * @num_entries: number of descriptors to be sent 1769 * @hdr_field: bit field determining which headers will be sent 1770 * 1771 * This function will build a TX descriptor array with applicable 1772 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1773 */ 1774 1775 static void build_hdr_descs_arr(struct sk_buff *skb, 1776 union sub_crq *indir_arr, 1777 int *num_entries, u8 hdr_field) 1778 { 1779 int hdr_len[3] = {0, 0, 0}; 1780 u8 hdr_data[140] = {0}; 1781 int tot_len; 1782 1783 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1784 hdr_data); 1785 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1786 indir_arr + 1); 1787 } 1788 1789 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1790 struct net_device *netdev) 1791 { 1792 /* For some backing devices, mishandling of small packets 1793 * can result in a loss of connection or TX stall. Device 1794 * architects recommend that no packet should be smaller 1795 * than the minimum MTU value provided to the driver, so 1796 * pad any packets to that length 1797 */ 1798 if (skb->len < netdev->min_mtu) 1799 return skb_put_padto(skb, netdev->min_mtu); 1800 1801 return 0; 1802 } 1803 1804 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1805 struct ibmvnic_sub_crq_queue *tx_scrq) 1806 { 1807 struct ibmvnic_ind_xmit_queue *ind_bufp; 1808 struct ibmvnic_tx_buff *tx_buff; 1809 struct ibmvnic_tx_pool *tx_pool; 1810 union sub_crq tx_scrq_entry; 1811 int queue_num; 1812 int entries; 1813 int index; 1814 int i; 1815 1816 ind_bufp = &tx_scrq->ind_buf; 1817 entries = (u64)ind_bufp->index; 1818 queue_num = tx_scrq->pool_index; 1819 1820 for (i = entries - 1; i >= 0; --i) { 1821 tx_scrq_entry = ind_bufp->indir_arr[i]; 1822 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1823 continue; 1824 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1825 if (index & IBMVNIC_TSO_POOL_MASK) { 1826 tx_pool = &adapter->tso_pool[queue_num]; 1827 index &= ~IBMVNIC_TSO_POOL_MASK; 1828 } else { 1829 tx_pool = &adapter->tx_pool[queue_num]; 1830 } 1831 tx_pool->free_map[tx_pool->consumer_index] = index; 1832 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1833 tx_pool->num_buffers - 1 : 1834 tx_pool->consumer_index - 1; 1835 tx_buff = &tx_pool->tx_buff[index]; 1836 adapter->netdev->stats.tx_packets--; 1837 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1838 adapter->tx_stats_buffers[queue_num].packets--; 1839 adapter->tx_stats_buffers[queue_num].bytes -= 1840 tx_buff->skb->len; 1841 dev_kfree_skb_any(tx_buff->skb); 1842 tx_buff->skb = NULL; 1843 adapter->netdev->stats.tx_dropped++; 1844 } 1845 ind_bufp->index = 0; 1846 if (atomic_sub_return(entries, &tx_scrq->used) <= 1847 (adapter->req_tx_entries_per_subcrq / 2) && 1848 __netif_subqueue_stopped(adapter->netdev, queue_num) && 1849 !test_bit(0, &adapter->resetting)) { 1850 netif_wake_subqueue(adapter->netdev, queue_num); 1851 netdev_dbg(adapter->netdev, "Started queue %d\n", 1852 queue_num); 1853 } 1854 } 1855 1856 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1857 struct ibmvnic_sub_crq_queue *tx_scrq) 1858 { 1859 struct ibmvnic_ind_xmit_queue *ind_bufp; 1860 u64 dma_addr; 1861 u64 entries; 1862 u64 handle; 1863 int rc; 1864 1865 ind_bufp = &tx_scrq->ind_buf; 1866 dma_addr = (u64)ind_bufp->indir_dma; 1867 entries = (u64)ind_bufp->index; 1868 handle = tx_scrq->handle; 1869 1870 if (!entries) 1871 return 0; 1872 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1873 if (rc) 1874 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1875 else 1876 ind_bufp->index = 0; 1877 return 0; 1878 } 1879 1880 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1881 { 1882 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1883 int queue_num = skb_get_queue_mapping(skb); 1884 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1885 struct device *dev = &adapter->vdev->dev; 1886 struct ibmvnic_ind_xmit_queue *ind_bufp; 1887 struct ibmvnic_tx_buff *tx_buff = NULL; 1888 struct ibmvnic_sub_crq_queue *tx_scrq; 1889 struct ibmvnic_tx_pool *tx_pool; 1890 unsigned int tx_send_failed = 0; 1891 netdev_tx_t ret = NETDEV_TX_OK; 1892 unsigned int tx_map_failed = 0; 1893 union sub_crq indir_arr[16]; 1894 unsigned int tx_dropped = 0; 1895 unsigned int tx_packets = 0; 1896 unsigned int tx_bytes = 0; 1897 dma_addr_t data_dma_addr; 1898 struct netdev_queue *txq; 1899 unsigned long lpar_rc; 1900 union sub_crq tx_crq; 1901 unsigned int offset; 1902 int num_entries = 1; 1903 unsigned char *dst; 1904 int index = 0; 1905 u8 proto = 0; 1906 1907 tx_scrq = adapter->tx_scrq[queue_num]; 1908 txq = netdev_get_tx_queue(netdev, queue_num); 1909 ind_bufp = &tx_scrq->ind_buf; 1910 1911 if (test_bit(0, &adapter->resetting)) { 1912 dev_kfree_skb_any(skb); 1913 1914 tx_send_failed++; 1915 tx_dropped++; 1916 ret = NETDEV_TX_OK; 1917 goto out; 1918 } 1919 1920 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1921 tx_dropped++; 1922 tx_send_failed++; 1923 ret = NETDEV_TX_OK; 1924 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1925 goto out; 1926 } 1927 if (skb_is_gso(skb)) 1928 tx_pool = &adapter->tso_pool[queue_num]; 1929 else 1930 tx_pool = &adapter->tx_pool[queue_num]; 1931 1932 index = tx_pool->free_map[tx_pool->consumer_index]; 1933 1934 if (index == IBMVNIC_INVALID_MAP) { 1935 dev_kfree_skb_any(skb); 1936 tx_send_failed++; 1937 tx_dropped++; 1938 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1939 ret = NETDEV_TX_OK; 1940 goto out; 1941 } 1942 1943 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1944 1945 offset = index * tx_pool->buf_size; 1946 dst = tx_pool->long_term_buff.buff + offset; 1947 memset(dst, 0, tx_pool->buf_size); 1948 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1949 1950 if (skb_shinfo(skb)->nr_frags) { 1951 int cur, i; 1952 1953 /* Copy the head */ 1954 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1955 cur = skb_headlen(skb); 1956 1957 /* Copy the frags */ 1958 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1959 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1960 1961 memcpy(dst + cur, skb_frag_address(frag), 1962 skb_frag_size(frag)); 1963 cur += skb_frag_size(frag); 1964 } 1965 } else { 1966 skb_copy_from_linear_data(skb, dst, skb->len); 1967 } 1968 1969 /* post changes to long_term_buff *dst before VIOS accessing it */ 1970 dma_wmb(); 1971 1972 tx_pool->consumer_index = 1973 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1974 1975 tx_buff = &tx_pool->tx_buff[index]; 1976 tx_buff->skb = skb; 1977 tx_buff->index = index; 1978 tx_buff->pool_index = queue_num; 1979 1980 memset(&tx_crq, 0, sizeof(tx_crq)); 1981 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1982 tx_crq.v1.type = IBMVNIC_TX_DESC; 1983 tx_crq.v1.n_crq_elem = 1; 1984 tx_crq.v1.n_sge = 1; 1985 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1986 1987 if (skb_is_gso(skb)) 1988 tx_crq.v1.correlator = 1989 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1990 else 1991 tx_crq.v1.correlator = cpu_to_be32(index); 1992 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1993 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1994 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1995 1996 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1997 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1998 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1999 } 2000 2001 if (skb->protocol == htons(ETH_P_IP)) { 2002 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2003 proto = ip_hdr(skb)->protocol; 2004 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2005 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2006 proto = ipv6_hdr(skb)->nexthdr; 2007 } 2008 2009 if (proto == IPPROTO_TCP) 2010 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2011 else if (proto == IPPROTO_UDP) 2012 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2013 2014 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2015 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2016 hdrs += 2; 2017 } 2018 if (skb_is_gso(skb)) { 2019 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2020 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2021 hdrs += 2; 2022 } 2023 2024 if ((*hdrs >> 7) & 1) 2025 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2026 2027 tx_crq.v1.n_crq_elem = num_entries; 2028 tx_buff->num_entries = num_entries; 2029 /* flush buffer if current entry can not fit */ 2030 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2031 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2032 if (lpar_rc != H_SUCCESS) 2033 goto tx_flush_err; 2034 } 2035 2036 indir_arr[0] = tx_crq; 2037 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2038 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2039 ind_bufp->index += num_entries; 2040 if (__netdev_tx_sent_queue(txq, skb->len, 2041 netdev_xmit_more() && 2042 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2043 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2044 if (lpar_rc != H_SUCCESS) 2045 goto tx_err; 2046 } 2047 2048 if (atomic_add_return(num_entries, &tx_scrq->used) 2049 >= adapter->req_tx_entries_per_subcrq) { 2050 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2051 netif_stop_subqueue(netdev, queue_num); 2052 } 2053 2054 tx_packets++; 2055 tx_bytes += skb->len; 2056 txq_trans_cond_update(txq); 2057 ret = NETDEV_TX_OK; 2058 goto out; 2059 2060 tx_flush_err: 2061 dev_kfree_skb_any(skb); 2062 tx_buff->skb = NULL; 2063 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2064 tx_pool->num_buffers - 1 : 2065 tx_pool->consumer_index - 1; 2066 tx_dropped++; 2067 tx_err: 2068 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2069 dev_err_ratelimited(dev, "tx: send failed\n"); 2070 2071 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2072 /* Disable TX and report carrier off if queue is closed 2073 * or pending failover. 2074 * Firmware guarantees that a signal will be sent to the 2075 * driver, triggering a reset or some other action. 2076 */ 2077 netif_tx_stop_all_queues(netdev); 2078 netif_carrier_off(netdev); 2079 } 2080 out: 2081 netdev->stats.tx_dropped += tx_dropped; 2082 netdev->stats.tx_bytes += tx_bytes; 2083 netdev->stats.tx_packets += tx_packets; 2084 adapter->tx_send_failed += tx_send_failed; 2085 adapter->tx_map_failed += tx_map_failed; 2086 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2087 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2088 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2089 2090 return ret; 2091 } 2092 2093 static void ibmvnic_set_multi(struct net_device *netdev) 2094 { 2095 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2096 struct netdev_hw_addr *ha; 2097 union ibmvnic_crq crq; 2098 2099 memset(&crq, 0, sizeof(crq)); 2100 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2101 crq.request_capability.cmd = REQUEST_CAPABILITY; 2102 2103 if (netdev->flags & IFF_PROMISC) { 2104 if (!adapter->promisc_supported) 2105 return; 2106 } else { 2107 if (netdev->flags & IFF_ALLMULTI) { 2108 /* Accept all multicast */ 2109 memset(&crq, 0, sizeof(crq)); 2110 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2111 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2112 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2113 ibmvnic_send_crq(adapter, &crq); 2114 } else if (netdev_mc_empty(netdev)) { 2115 /* Reject all multicast */ 2116 memset(&crq, 0, sizeof(crq)); 2117 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2118 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2119 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2120 ibmvnic_send_crq(adapter, &crq); 2121 } else { 2122 /* Accept one or more multicast(s) */ 2123 netdev_for_each_mc_addr(ha, netdev) { 2124 memset(&crq, 0, sizeof(crq)); 2125 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2126 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2127 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2128 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2129 ha->addr); 2130 ibmvnic_send_crq(adapter, &crq); 2131 } 2132 } 2133 } 2134 } 2135 2136 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2137 { 2138 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2139 union ibmvnic_crq crq; 2140 int rc; 2141 2142 if (!is_valid_ether_addr(dev_addr)) { 2143 rc = -EADDRNOTAVAIL; 2144 goto err; 2145 } 2146 2147 memset(&crq, 0, sizeof(crq)); 2148 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2149 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2150 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2151 2152 mutex_lock(&adapter->fw_lock); 2153 adapter->fw_done_rc = 0; 2154 reinit_completion(&adapter->fw_done); 2155 2156 rc = ibmvnic_send_crq(adapter, &crq); 2157 if (rc) { 2158 rc = -EIO; 2159 mutex_unlock(&adapter->fw_lock); 2160 goto err; 2161 } 2162 2163 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2164 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2165 if (rc || adapter->fw_done_rc) { 2166 rc = -EIO; 2167 mutex_unlock(&adapter->fw_lock); 2168 goto err; 2169 } 2170 mutex_unlock(&adapter->fw_lock); 2171 return 0; 2172 err: 2173 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2174 return rc; 2175 } 2176 2177 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2178 { 2179 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2180 struct sockaddr *addr = p; 2181 int rc; 2182 2183 rc = 0; 2184 if (!is_valid_ether_addr(addr->sa_data)) 2185 return -EADDRNOTAVAIL; 2186 2187 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2188 if (adapter->state != VNIC_PROBED) 2189 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2190 2191 return rc; 2192 } 2193 2194 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2195 { 2196 switch (reason) { 2197 case VNIC_RESET_FAILOVER: 2198 return "FAILOVER"; 2199 case VNIC_RESET_MOBILITY: 2200 return "MOBILITY"; 2201 case VNIC_RESET_FATAL: 2202 return "FATAL"; 2203 case VNIC_RESET_NON_FATAL: 2204 return "NON_FATAL"; 2205 case VNIC_RESET_TIMEOUT: 2206 return "TIMEOUT"; 2207 case VNIC_RESET_CHANGE_PARAM: 2208 return "CHANGE_PARAM"; 2209 case VNIC_RESET_PASSIVE_INIT: 2210 return "PASSIVE_INIT"; 2211 } 2212 return "UNKNOWN"; 2213 } 2214 2215 /* 2216 * do_reset returns zero if we are able to keep processing reset events, or 2217 * non-zero if we hit a fatal error and must halt. 2218 */ 2219 static int do_reset(struct ibmvnic_adapter *adapter, 2220 struct ibmvnic_rwi *rwi, u32 reset_state) 2221 { 2222 struct net_device *netdev = adapter->netdev; 2223 u64 old_num_rx_queues, old_num_tx_queues; 2224 u64 old_num_rx_slots, old_num_tx_slots; 2225 int rc; 2226 2227 netdev_dbg(adapter->netdev, 2228 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2229 adapter_state_to_string(adapter->state), 2230 adapter->failover_pending, 2231 reset_reason_to_string(rwi->reset_reason), 2232 adapter_state_to_string(reset_state)); 2233 2234 adapter->reset_reason = rwi->reset_reason; 2235 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2236 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2237 rtnl_lock(); 2238 2239 /* Now that we have the rtnl lock, clear any pending failover. 2240 * This will ensure ibmvnic_open() has either completed or will 2241 * block until failover is complete. 2242 */ 2243 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2244 adapter->failover_pending = false; 2245 2246 /* read the state and check (again) after getting rtnl */ 2247 reset_state = adapter->state; 2248 2249 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2250 rc = -EBUSY; 2251 goto out; 2252 } 2253 2254 netif_carrier_off(netdev); 2255 2256 old_num_rx_queues = adapter->req_rx_queues; 2257 old_num_tx_queues = adapter->req_tx_queues; 2258 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2259 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2260 2261 ibmvnic_cleanup(netdev); 2262 2263 if (reset_state == VNIC_OPEN && 2264 adapter->reset_reason != VNIC_RESET_MOBILITY && 2265 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2266 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2267 rc = __ibmvnic_close(netdev); 2268 if (rc) 2269 goto out; 2270 } else { 2271 adapter->state = VNIC_CLOSING; 2272 2273 /* Release the RTNL lock before link state change and 2274 * re-acquire after the link state change to allow 2275 * linkwatch_event to grab the RTNL lock and run during 2276 * a reset. 2277 */ 2278 rtnl_unlock(); 2279 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2280 rtnl_lock(); 2281 if (rc) 2282 goto out; 2283 2284 if (adapter->state == VNIC_OPEN) { 2285 /* When we dropped rtnl, ibmvnic_open() got 2286 * it and noticed that we are resetting and 2287 * set the adapter state to OPEN. Update our 2288 * new "target" state, and resume the reset 2289 * from VNIC_CLOSING state. 2290 */ 2291 netdev_dbg(netdev, 2292 "Open changed state from %s, updating.\n", 2293 adapter_state_to_string(reset_state)); 2294 reset_state = VNIC_OPEN; 2295 adapter->state = VNIC_CLOSING; 2296 } 2297 2298 if (adapter->state != VNIC_CLOSING) { 2299 /* If someone else changed the adapter state 2300 * when we dropped the rtnl, fail the reset 2301 */ 2302 rc = -EAGAIN; 2303 goto out; 2304 } 2305 adapter->state = VNIC_CLOSED; 2306 } 2307 } 2308 2309 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2310 release_resources(adapter); 2311 release_sub_crqs(adapter, 1); 2312 release_crq_queue(adapter); 2313 } 2314 2315 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2316 /* remove the closed state so when we call open it appears 2317 * we are coming from the probed state. 2318 */ 2319 adapter->state = VNIC_PROBED; 2320 2321 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2322 rc = init_crq_queue(adapter); 2323 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2324 rc = ibmvnic_reenable_crq_queue(adapter); 2325 release_sub_crqs(adapter, 1); 2326 } else { 2327 rc = ibmvnic_reset_crq(adapter); 2328 if (rc == H_CLOSED || rc == H_SUCCESS) { 2329 rc = vio_enable_interrupts(adapter->vdev); 2330 if (rc) 2331 netdev_err(adapter->netdev, 2332 "Reset failed to enable interrupts. rc=%d\n", 2333 rc); 2334 } 2335 } 2336 2337 if (rc) { 2338 netdev_err(adapter->netdev, 2339 "Reset couldn't initialize crq. rc=%d\n", rc); 2340 goto out; 2341 } 2342 2343 rc = ibmvnic_reset_init(adapter, true); 2344 if (rc) 2345 goto out; 2346 2347 /* If the adapter was in PROBE or DOWN state prior to the reset, 2348 * exit here. 2349 */ 2350 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2351 rc = 0; 2352 goto out; 2353 } 2354 2355 rc = ibmvnic_login(netdev); 2356 if (rc) 2357 goto out; 2358 2359 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2360 rc = init_resources(adapter); 2361 if (rc) 2362 goto out; 2363 } else if (adapter->req_rx_queues != old_num_rx_queues || 2364 adapter->req_tx_queues != old_num_tx_queues || 2365 adapter->req_rx_add_entries_per_subcrq != 2366 old_num_rx_slots || 2367 adapter->req_tx_entries_per_subcrq != 2368 old_num_tx_slots || 2369 !adapter->rx_pool || 2370 !adapter->tso_pool || 2371 !adapter->tx_pool) { 2372 release_napi(adapter); 2373 release_vpd_data(adapter); 2374 2375 rc = init_resources(adapter); 2376 if (rc) 2377 goto out; 2378 2379 } else { 2380 rc = init_tx_pools(netdev); 2381 if (rc) { 2382 netdev_dbg(netdev, 2383 "init tx pools failed (%d)\n", 2384 rc); 2385 goto out; 2386 } 2387 2388 rc = init_rx_pools(netdev); 2389 if (rc) { 2390 netdev_dbg(netdev, 2391 "init rx pools failed (%d)\n", 2392 rc); 2393 goto out; 2394 } 2395 } 2396 ibmvnic_disable_irqs(adapter); 2397 } 2398 adapter->state = VNIC_CLOSED; 2399 2400 if (reset_state == VNIC_CLOSED) { 2401 rc = 0; 2402 goto out; 2403 } 2404 2405 rc = __ibmvnic_open(netdev); 2406 if (rc) { 2407 rc = IBMVNIC_OPEN_FAILED; 2408 goto out; 2409 } 2410 2411 /* refresh device's multicast list */ 2412 ibmvnic_set_multi(netdev); 2413 2414 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2415 adapter->reset_reason == VNIC_RESET_MOBILITY) 2416 __netdev_notify_peers(netdev); 2417 2418 rc = 0; 2419 2420 out: 2421 /* restore the adapter state if reset failed */ 2422 if (rc) 2423 adapter->state = reset_state; 2424 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2425 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2426 rtnl_unlock(); 2427 2428 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2429 adapter_state_to_string(adapter->state), 2430 adapter->failover_pending, rc); 2431 return rc; 2432 } 2433 2434 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2435 struct ibmvnic_rwi *rwi, u32 reset_state) 2436 { 2437 struct net_device *netdev = adapter->netdev; 2438 int rc; 2439 2440 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2441 reset_reason_to_string(rwi->reset_reason)); 2442 2443 /* read the state and check (again) after getting rtnl */ 2444 reset_state = adapter->state; 2445 2446 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2447 rc = -EBUSY; 2448 goto out; 2449 } 2450 2451 netif_carrier_off(netdev); 2452 adapter->reset_reason = rwi->reset_reason; 2453 2454 ibmvnic_cleanup(netdev); 2455 release_resources(adapter); 2456 release_sub_crqs(adapter, 0); 2457 release_crq_queue(adapter); 2458 2459 /* remove the closed state so when we call open it appears 2460 * we are coming from the probed state. 2461 */ 2462 adapter->state = VNIC_PROBED; 2463 2464 reinit_completion(&adapter->init_done); 2465 rc = init_crq_queue(adapter); 2466 if (rc) { 2467 netdev_err(adapter->netdev, 2468 "Couldn't initialize crq. rc=%d\n", rc); 2469 goto out; 2470 } 2471 2472 rc = ibmvnic_reset_init(adapter, false); 2473 if (rc) 2474 goto out; 2475 2476 /* If the adapter was in PROBE or DOWN state prior to the reset, 2477 * exit here. 2478 */ 2479 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2480 goto out; 2481 2482 rc = ibmvnic_login(netdev); 2483 if (rc) 2484 goto out; 2485 2486 rc = init_resources(adapter); 2487 if (rc) 2488 goto out; 2489 2490 ibmvnic_disable_irqs(adapter); 2491 adapter->state = VNIC_CLOSED; 2492 2493 if (reset_state == VNIC_CLOSED) 2494 goto out; 2495 2496 rc = __ibmvnic_open(netdev); 2497 if (rc) { 2498 rc = IBMVNIC_OPEN_FAILED; 2499 goto out; 2500 } 2501 2502 __netdev_notify_peers(netdev); 2503 out: 2504 /* restore adapter state if reset failed */ 2505 if (rc) 2506 adapter->state = reset_state; 2507 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2508 adapter_state_to_string(adapter->state), 2509 adapter->failover_pending, rc); 2510 return rc; 2511 } 2512 2513 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2514 { 2515 struct ibmvnic_rwi *rwi; 2516 unsigned long flags; 2517 2518 spin_lock_irqsave(&adapter->rwi_lock, flags); 2519 2520 if (!list_empty(&adapter->rwi_list)) { 2521 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2522 list); 2523 list_del(&rwi->list); 2524 } else { 2525 rwi = NULL; 2526 } 2527 2528 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2529 return rwi; 2530 } 2531 2532 /** 2533 * do_passive_init - complete probing when partner device is detected. 2534 * @adapter: ibmvnic_adapter struct 2535 * 2536 * If the ibmvnic device does not have a partner device to communicate with at boot 2537 * and that partner device comes online at a later time, this function is called 2538 * to complete the initialization process of ibmvnic device. 2539 * Caller is expected to hold rtnl_lock(). 2540 * 2541 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2542 * in the down state. 2543 * Returns 0 upon success and the device is in PROBED state. 2544 */ 2545 2546 static int do_passive_init(struct ibmvnic_adapter *adapter) 2547 { 2548 unsigned long timeout = msecs_to_jiffies(30000); 2549 struct net_device *netdev = adapter->netdev; 2550 struct device *dev = &adapter->vdev->dev; 2551 int rc; 2552 2553 netdev_dbg(netdev, "Partner device found, probing.\n"); 2554 2555 adapter->state = VNIC_PROBING; 2556 reinit_completion(&adapter->init_done); 2557 adapter->init_done_rc = 0; 2558 adapter->crq.active = true; 2559 2560 rc = send_crq_init_complete(adapter); 2561 if (rc) 2562 goto out; 2563 2564 rc = send_version_xchg(adapter); 2565 if (rc) 2566 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2567 2568 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2569 dev_err(dev, "Initialization sequence timed out\n"); 2570 rc = -ETIMEDOUT; 2571 goto out; 2572 } 2573 2574 rc = init_sub_crqs(adapter); 2575 if (rc) { 2576 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2577 goto out; 2578 } 2579 2580 rc = init_sub_crq_irqs(adapter); 2581 if (rc) { 2582 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2583 goto init_failed; 2584 } 2585 2586 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2587 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2588 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2589 2590 adapter->state = VNIC_PROBED; 2591 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2592 2593 return 0; 2594 2595 init_failed: 2596 release_sub_crqs(adapter, 1); 2597 out: 2598 adapter->state = VNIC_DOWN; 2599 return rc; 2600 } 2601 2602 static void __ibmvnic_reset(struct work_struct *work) 2603 { 2604 struct ibmvnic_adapter *adapter; 2605 bool saved_state = false; 2606 struct ibmvnic_rwi *tmprwi; 2607 struct ibmvnic_rwi *rwi; 2608 unsigned long flags; 2609 u32 reset_state; 2610 int num_fails = 0; 2611 int rc = 0; 2612 2613 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2614 2615 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2616 queue_delayed_work(system_long_wq, 2617 &adapter->ibmvnic_delayed_reset, 2618 IBMVNIC_RESET_DELAY); 2619 return; 2620 } 2621 2622 rwi = get_next_rwi(adapter); 2623 while (rwi) { 2624 spin_lock_irqsave(&adapter->state_lock, flags); 2625 2626 if (adapter->state == VNIC_REMOVING || 2627 adapter->state == VNIC_REMOVED) { 2628 spin_unlock_irqrestore(&adapter->state_lock, flags); 2629 kfree(rwi); 2630 rc = EBUSY; 2631 break; 2632 } 2633 2634 if (!saved_state) { 2635 reset_state = adapter->state; 2636 saved_state = true; 2637 } 2638 spin_unlock_irqrestore(&adapter->state_lock, flags); 2639 2640 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2641 rtnl_lock(); 2642 rc = do_passive_init(adapter); 2643 rtnl_unlock(); 2644 if (!rc) 2645 netif_carrier_on(adapter->netdev); 2646 } else if (adapter->force_reset_recovery) { 2647 /* Since we are doing a hard reset now, clear the 2648 * failover_pending flag so we don't ignore any 2649 * future MOBILITY or other resets. 2650 */ 2651 adapter->failover_pending = false; 2652 2653 /* Transport event occurred during previous reset */ 2654 if (adapter->wait_for_reset) { 2655 /* Previous was CHANGE_PARAM; caller locked */ 2656 adapter->force_reset_recovery = false; 2657 rc = do_hard_reset(adapter, rwi, reset_state); 2658 } else { 2659 rtnl_lock(); 2660 adapter->force_reset_recovery = false; 2661 rc = do_hard_reset(adapter, rwi, reset_state); 2662 rtnl_unlock(); 2663 } 2664 if (rc) 2665 num_fails++; 2666 else 2667 num_fails = 0; 2668 2669 /* If auto-priority-failover is enabled we can get 2670 * back to back failovers during resets, resulting 2671 * in at least two failed resets (from high-priority 2672 * backing device to low-priority one and then back) 2673 * If resets continue to fail beyond that, give the 2674 * adapter some time to settle down before retrying. 2675 */ 2676 if (num_fails >= 3) { 2677 netdev_dbg(adapter->netdev, 2678 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 2679 adapter_state_to_string(adapter->state), 2680 num_fails); 2681 set_current_state(TASK_UNINTERRUPTIBLE); 2682 schedule_timeout(60 * HZ); 2683 } 2684 } else { 2685 rc = do_reset(adapter, rwi, reset_state); 2686 } 2687 tmprwi = rwi; 2688 adapter->last_reset_time = jiffies; 2689 2690 if (rc) 2691 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2692 2693 rwi = get_next_rwi(adapter); 2694 2695 /* 2696 * If there is another reset queued, free the previous rwi 2697 * and process the new reset even if previous reset failed 2698 * (the previous reset could have failed because of a fail 2699 * over for instance, so process the fail over). 2700 * 2701 * If there are no resets queued and the previous reset failed, 2702 * the adapter would be in an undefined state. So retry the 2703 * previous reset as a hard reset. 2704 */ 2705 if (rwi) 2706 kfree(tmprwi); 2707 else if (rc) 2708 rwi = tmprwi; 2709 2710 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2711 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2712 adapter->force_reset_recovery = true; 2713 } 2714 2715 if (adapter->wait_for_reset) { 2716 adapter->reset_done_rc = rc; 2717 complete(&adapter->reset_done); 2718 } 2719 2720 clear_bit_unlock(0, &adapter->resetting); 2721 2722 netdev_dbg(adapter->netdev, 2723 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2724 adapter_state_to_string(adapter->state), 2725 adapter->force_reset_recovery, 2726 adapter->wait_for_reset); 2727 } 2728 2729 static void __ibmvnic_delayed_reset(struct work_struct *work) 2730 { 2731 struct ibmvnic_adapter *adapter; 2732 2733 adapter = container_of(work, struct ibmvnic_adapter, 2734 ibmvnic_delayed_reset.work); 2735 __ibmvnic_reset(&adapter->ibmvnic_reset); 2736 } 2737 2738 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2739 enum ibmvnic_reset_reason reason) 2740 { 2741 struct list_head *entry, *tmp_entry; 2742 struct ibmvnic_rwi *rwi, *tmp; 2743 struct net_device *netdev = adapter->netdev; 2744 unsigned long flags; 2745 int ret; 2746 2747 spin_lock_irqsave(&adapter->rwi_lock, flags); 2748 2749 /* If failover is pending don't schedule any other reset. 2750 * Instead let the failover complete. If there is already a 2751 * a failover reset scheduled, we will detect and drop the 2752 * duplicate reset when walking the ->rwi_list below. 2753 */ 2754 if (adapter->state == VNIC_REMOVING || 2755 adapter->state == VNIC_REMOVED || 2756 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2757 ret = EBUSY; 2758 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2759 goto err; 2760 } 2761 2762 if (adapter->state == VNIC_PROBING) { 2763 netdev_warn(netdev, "Adapter reset during probe\n"); 2764 adapter->init_done_rc = -EAGAIN; 2765 ret = EAGAIN; 2766 goto err; 2767 } 2768 2769 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2770 if (tmp->reset_reason == reason) { 2771 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2772 reset_reason_to_string(reason)); 2773 ret = EBUSY; 2774 goto err; 2775 } 2776 } 2777 2778 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2779 if (!rwi) { 2780 ret = ENOMEM; 2781 goto err; 2782 } 2783 /* if we just received a transport event, 2784 * flush reset queue and process this reset 2785 */ 2786 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2787 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2788 list_del(entry); 2789 } 2790 rwi->reset_reason = reason; 2791 list_add_tail(&rwi->list, &adapter->rwi_list); 2792 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2793 reset_reason_to_string(reason)); 2794 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2795 2796 ret = 0; 2797 err: 2798 /* ibmvnic_close() below can block, so drop the lock first */ 2799 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2800 2801 if (ret == ENOMEM) 2802 ibmvnic_close(netdev); 2803 2804 return -ret; 2805 } 2806 2807 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2808 { 2809 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2810 2811 if (test_bit(0, &adapter->resetting)) { 2812 netdev_err(adapter->netdev, 2813 "Adapter is resetting, skip timeout reset\n"); 2814 return; 2815 } 2816 /* No queuing up reset until at least 5 seconds (default watchdog val) 2817 * after last reset 2818 */ 2819 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2820 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2821 return; 2822 } 2823 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2824 } 2825 2826 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2827 struct ibmvnic_rx_buff *rx_buff) 2828 { 2829 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2830 2831 rx_buff->skb = NULL; 2832 2833 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2834 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2835 2836 atomic_dec(&pool->available); 2837 } 2838 2839 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2840 { 2841 struct ibmvnic_sub_crq_queue *rx_scrq; 2842 struct ibmvnic_adapter *adapter; 2843 struct net_device *netdev; 2844 int frames_processed; 2845 int scrq_num; 2846 2847 netdev = napi->dev; 2848 adapter = netdev_priv(netdev); 2849 scrq_num = (int)(napi - adapter->napi); 2850 frames_processed = 0; 2851 rx_scrq = adapter->rx_scrq[scrq_num]; 2852 2853 restart_poll: 2854 while (frames_processed < budget) { 2855 struct sk_buff *skb; 2856 struct ibmvnic_rx_buff *rx_buff; 2857 union sub_crq *next; 2858 u32 length; 2859 u16 offset; 2860 u8 flags = 0; 2861 2862 if (unlikely(test_bit(0, &adapter->resetting) && 2863 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2864 enable_scrq_irq(adapter, rx_scrq); 2865 napi_complete_done(napi, frames_processed); 2866 return frames_processed; 2867 } 2868 2869 if (!pending_scrq(adapter, rx_scrq)) 2870 break; 2871 next = ibmvnic_next_scrq(adapter, rx_scrq); 2872 rx_buff = (struct ibmvnic_rx_buff *) 2873 be64_to_cpu(next->rx_comp.correlator); 2874 /* do error checking */ 2875 if (next->rx_comp.rc) { 2876 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2877 be16_to_cpu(next->rx_comp.rc)); 2878 /* free the entry */ 2879 next->rx_comp.first = 0; 2880 dev_kfree_skb_any(rx_buff->skb); 2881 remove_buff_from_pool(adapter, rx_buff); 2882 continue; 2883 } else if (!rx_buff->skb) { 2884 /* free the entry */ 2885 next->rx_comp.first = 0; 2886 remove_buff_from_pool(adapter, rx_buff); 2887 continue; 2888 } 2889 2890 length = be32_to_cpu(next->rx_comp.len); 2891 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2892 flags = next->rx_comp.flags; 2893 skb = rx_buff->skb; 2894 /* load long_term_buff before copying to skb */ 2895 dma_rmb(); 2896 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2897 length); 2898 2899 /* VLAN Header has been stripped by the system firmware and 2900 * needs to be inserted by the driver 2901 */ 2902 if (adapter->rx_vlan_header_insertion && 2903 (flags & IBMVNIC_VLAN_STRIPPED)) 2904 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2905 ntohs(next->rx_comp.vlan_tci)); 2906 2907 /* free the entry */ 2908 next->rx_comp.first = 0; 2909 remove_buff_from_pool(adapter, rx_buff); 2910 2911 skb_put(skb, length); 2912 skb->protocol = eth_type_trans(skb, netdev); 2913 skb_record_rx_queue(skb, scrq_num); 2914 2915 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2916 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2917 skb->ip_summed = CHECKSUM_UNNECESSARY; 2918 } 2919 2920 length = skb->len; 2921 napi_gro_receive(napi, skb); /* send it up */ 2922 netdev->stats.rx_packets++; 2923 netdev->stats.rx_bytes += length; 2924 adapter->rx_stats_buffers[scrq_num].packets++; 2925 adapter->rx_stats_buffers[scrq_num].bytes += length; 2926 frames_processed++; 2927 } 2928 2929 if (adapter->state != VNIC_CLOSING && 2930 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2931 adapter->req_rx_add_entries_per_subcrq / 2) || 2932 frames_processed < budget)) 2933 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2934 if (frames_processed < budget) { 2935 if (napi_complete_done(napi, frames_processed)) { 2936 enable_scrq_irq(adapter, rx_scrq); 2937 if (pending_scrq(adapter, rx_scrq)) { 2938 if (napi_reschedule(napi)) { 2939 disable_scrq_irq(adapter, rx_scrq); 2940 goto restart_poll; 2941 } 2942 } 2943 } 2944 } 2945 return frames_processed; 2946 } 2947 2948 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2949 { 2950 int rc, ret; 2951 2952 adapter->fallback.mtu = adapter->req_mtu; 2953 adapter->fallback.rx_queues = adapter->req_rx_queues; 2954 adapter->fallback.tx_queues = adapter->req_tx_queues; 2955 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2956 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2957 2958 reinit_completion(&adapter->reset_done); 2959 adapter->wait_for_reset = true; 2960 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2961 2962 if (rc) { 2963 ret = rc; 2964 goto out; 2965 } 2966 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2967 if (rc) { 2968 ret = -ENODEV; 2969 goto out; 2970 } 2971 2972 ret = 0; 2973 if (adapter->reset_done_rc) { 2974 ret = -EIO; 2975 adapter->desired.mtu = adapter->fallback.mtu; 2976 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2977 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2978 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2979 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2980 2981 reinit_completion(&adapter->reset_done); 2982 adapter->wait_for_reset = true; 2983 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2984 if (rc) { 2985 ret = rc; 2986 goto out; 2987 } 2988 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2989 60000); 2990 if (rc) { 2991 ret = -ENODEV; 2992 goto out; 2993 } 2994 } 2995 out: 2996 adapter->wait_for_reset = false; 2997 2998 return ret; 2999 } 3000 3001 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3002 { 3003 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3004 3005 adapter->desired.mtu = new_mtu + ETH_HLEN; 3006 3007 return wait_for_reset(adapter); 3008 } 3009 3010 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3011 struct net_device *dev, 3012 netdev_features_t features) 3013 { 3014 /* Some backing hardware adapters can not 3015 * handle packets with a MSS less than 224 3016 * or with only one segment. 3017 */ 3018 if (skb_is_gso(skb)) { 3019 if (skb_shinfo(skb)->gso_size < 224 || 3020 skb_shinfo(skb)->gso_segs == 1) 3021 features &= ~NETIF_F_GSO_MASK; 3022 } 3023 3024 return features; 3025 } 3026 3027 static const struct net_device_ops ibmvnic_netdev_ops = { 3028 .ndo_open = ibmvnic_open, 3029 .ndo_stop = ibmvnic_close, 3030 .ndo_start_xmit = ibmvnic_xmit, 3031 .ndo_set_rx_mode = ibmvnic_set_multi, 3032 .ndo_set_mac_address = ibmvnic_set_mac, 3033 .ndo_validate_addr = eth_validate_addr, 3034 .ndo_tx_timeout = ibmvnic_tx_timeout, 3035 .ndo_change_mtu = ibmvnic_change_mtu, 3036 .ndo_features_check = ibmvnic_features_check, 3037 }; 3038 3039 /* ethtool functions */ 3040 3041 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3042 struct ethtool_link_ksettings *cmd) 3043 { 3044 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3045 int rc; 3046 3047 rc = send_query_phys_parms(adapter); 3048 if (rc) { 3049 adapter->speed = SPEED_UNKNOWN; 3050 adapter->duplex = DUPLEX_UNKNOWN; 3051 } 3052 cmd->base.speed = adapter->speed; 3053 cmd->base.duplex = adapter->duplex; 3054 cmd->base.port = PORT_FIBRE; 3055 cmd->base.phy_address = 0; 3056 cmd->base.autoneg = AUTONEG_ENABLE; 3057 3058 return 0; 3059 } 3060 3061 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3062 struct ethtool_drvinfo *info) 3063 { 3064 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3065 3066 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3067 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3068 strscpy(info->fw_version, adapter->fw_version, 3069 sizeof(info->fw_version)); 3070 } 3071 3072 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3073 { 3074 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3075 3076 return adapter->msg_enable; 3077 } 3078 3079 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3080 { 3081 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3082 3083 adapter->msg_enable = data; 3084 } 3085 3086 static u32 ibmvnic_get_link(struct net_device *netdev) 3087 { 3088 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3089 3090 /* Don't need to send a query because we request a logical link up at 3091 * init and then we wait for link state indications 3092 */ 3093 return adapter->logical_link_state; 3094 } 3095 3096 static void ibmvnic_get_ringparam(struct net_device *netdev, 3097 struct ethtool_ringparam *ring, 3098 struct kernel_ethtool_ringparam *kernel_ring, 3099 struct netlink_ext_ack *extack) 3100 { 3101 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3102 3103 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3104 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3105 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3106 } else { 3107 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3108 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3109 } 3110 ring->rx_mini_max_pending = 0; 3111 ring->rx_jumbo_max_pending = 0; 3112 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3113 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3114 ring->rx_mini_pending = 0; 3115 ring->rx_jumbo_pending = 0; 3116 } 3117 3118 static int ibmvnic_set_ringparam(struct net_device *netdev, 3119 struct ethtool_ringparam *ring, 3120 struct kernel_ethtool_ringparam *kernel_ring, 3121 struct netlink_ext_ack *extack) 3122 { 3123 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3124 int ret; 3125 3126 ret = 0; 3127 adapter->desired.rx_entries = ring->rx_pending; 3128 adapter->desired.tx_entries = ring->tx_pending; 3129 3130 ret = wait_for_reset(adapter); 3131 3132 if (!ret && 3133 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 3134 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 3135 netdev_info(netdev, 3136 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3137 ring->rx_pending, ring->tx_pending, 3138 adapter->req_rx_add_entries_per_subcrq, 3139 adapter->req_tx_entries_per_subcrq); 3140 return ret; 3141 } 3142 3143 static void ibmvnic_get_channels(struct net_device *netdev, 3144 struct ethtool_channels *channels) 3145 { 3146 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3147 3148 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3149 channels->max_rx = adapter->max_rx_queues; 3150 channels->max_tx = adapter->max_tx_queues; 3151 } else { 3152 channels->max_rx = IBMVNIC_MAX_QUEUES; 3153 channels->max_tx = IBMVNIC_MAX_QUEUES; 3154 } 3155 3156 channels->max_other = 0; 3157 channels->max_combined = 0; 3158 channels->rx_count = adapter->req_rx_queues; 3159 channels->tx_count = adapter->req_tx_queues; 3160 channels->other_count = 0; 3161 channels->combined_count = 0; 3162 } 3163 3164 static int ibmvnic_set_channels(struct net_device *netdev, 3165 struct ethtool_channels *channels) 3166 { 3167 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3168 int ret; 3169 3170 ret = 0; 3171 adapter->desired.rx_queues = channels->rx_count; 3172 adapter->desired.tx_queues = channels->tx_count; 3173 3174 ret = wait_for_reset(adapter); 3175 3176 if (!ret && 3177 (adapter->req_rx_queues != channels->rx_count || 3178 adapter->req_tx_queues != channels->tx_count)) 3179 netdev_info(netdev, 3180 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3181 channels->rx_count, channels->tx_count, 3182 adapter->req_rx_queues, adapter->req_tx_queues); 3183 return ret; 3184 } 3185 3186 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3187 { 3188 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3189 int i; 3190 3191 switch (stringset) { 3192 case ETH_SS_STATS: 3193 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 3194 i++, data += ETH_GSTRING_LEN) 3195 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3196 3197 for (i = 0; i < adapter->req_tx_queues; i++) { 3198 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3199 data += ETH_GSTRING_LEN; 3200 3201 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3202 data += ETH_GSTRING_LEN; 3203 3204 snprintf(data, ETH_GSTRING_LEN, 3205 "tx%d_dropped_packets", i); 3206 data += ETH_GSTRING_LEN; 3207 } 3208 3209 for (i = 0; i < adapter->req_rx_queues; i++) { 3210 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3211 data += ETH_GSTRING_LEN; 3212 3213 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3214 data += ETH_GSTRING_LEN; 3215 3216 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3217 data += ETH_GSTRING_LEN; 3218 } 3219 break; 3220 3221 case ETH_SS_PRIV_FLAGS: 3222 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3223 strcpy(data + i * ETH_GSTRING_LEN, 3224 ibmvnic_priv_flags[i]); 3225 break; 3226 default: 3227 return; 3228 } 3229 } 3230 3231 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3232 { 3233 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3234 3235 switch (sset) { 3236 case ETH_SS_STATS: 3237 return ARRAY_SIZE(ibmvnic_stats) + 3238 adapter->req_tx_queues * NUM_TX_STATS + 3239 adapter->req_rx_queues * NUM_RX_STATS; 3240 case ETH_SS_PRIV_FLAGS: 3241 return ARRAY_SIZE(ibmvnic_priv_flags); 3242 default: 3243 return -EOPNOTSUPP; 3244 } 3245 } 3246 3247 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3248 struct ethtool_stats *stats, u64 *data) 3249 { 3250 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3251 union ibmvnic_crq crq; 3252 int i, j; 3253 int rc; 3254 3255 memset(&crq, 0, sizeof(crq)); 3256 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3257 crq.request_statistics.cmd = REQUEST_STATISTICS; 3258 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3259 crq.request_statistics.len = 3260 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3261 3262 /* Wait for data to be written */ 3263 reinit_completion(&adapter->stats_done); 3264 rc = ibmvnic_send_crq(adapter, &crq); 3265 if (rc) 3266 return; 3267 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3268 if (rc) 3269 return; 3270 3271 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3272 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3273 (adapter, ibmvnic_stats[i].offset)); 3274 3275 for (j = 0; j < adapter->req_tx_queues; j++) { 3276 data[i] = adapter->tx_stats_buffers[j].packets; 3277 i++; 3278 data[i] = adapter->tx_stats_buffers[j].bytes; 3279 i++; 3280 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3281 i++; 3282 } 3283 3284 for (j = 0; j < adapter->req_rx_queues; j++) { 3285 data[i] = adapter->rx_stats_buffers[j].packets; 3286 i++; 3287 data[i] = adapter->rx_stats_buffers[j].bytes; 3288 i++; 3289 data[i] = adapter->rx_stats_buffers[j].interrupts; 3290 i++; 3291 } 3292 } 3293 3294 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3295 { 3296 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3297 3298 return adapter->priv_flags; 3299 } 3300 3301 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3302 { 3303 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3304 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3305 3306 if (which_maxes) 3307 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3308 else 3309 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3310 3311 return 0; 3312 } 3313 3314 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3315 .get_drvinfo = ibmvnic_get_drvinfo, 3316 .get_msglevel = ibmvnic_get_msglevel, 3317 .set_msglevel = ibmvnic_set_msglevel, 3318 .get_link = ibmvnic_get_link, 3319 .get_ringparam = ibmvnic_get_ringparam, 3320 .set_ringparam = ibmvnic_set_ringparam, 3321 .get_channels = ibmvnic_get_channels, 3322 .set_channels = ibmvnic_set_channels, 3323 .get_strings = ibmvnic_get_strings, 3324 .get_sset_count = ibmvnic_get_sset_count, 3325 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3326 .get_link_ksettings = ibmvnic_get_link_ksettings, 3327 .get_priv_flags = ibmvnic_get_priv_flags, 3328 .set_priv_flags = ibmvnic_set_priv_flags, 3329 }; 3330 3331 /* Routines for managing CRQs/sCRQs */ 3332 3333 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3334 struct ibmvnic_sub_crq_queue *scrq) 3335 { 3336 int rc; 3337 3338 if (!scrq) { 3339 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3340 return -EINVAL; 3341 } 3342 3343 if (scrq->irq) { 3344 free_irq(scrq->irq, scrq); 3345 irq_dispose_mapping(scrq->irq); 3346 scrq->irq = 0; 3347 } 3348 3349 if (scrq->msgs) { 3350 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3351 atomic_set(&scrq->used, 0); 3352 scrq->cur = 0; 3353 scrq->ind_buf.index = 0; 3354 } else { 3355 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3356 return -EINVAL; 3357 } 3358 3359 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3360 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3361 return rc; 3362 } 3363 3364 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3365 { 3366 int i, rc; 3367 3368 if (!adapter->tx_scrq || !adapter->rx_scrq) 3369 return -EINVAL; 3370 3371 for (i = 0; i < adapter->req_tx_queues; i++) { 3372 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3373 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3374 if (rc) 3375 return rc; 3376 } 3377 3378 for (i = 0; i < adapter->req_rx_queues; i++) { 3379 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3380 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3381 if (rc) 3382 return rc; 3383 } 3384 3385 return rc; 3386 } 3387 3388 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3389 struct ibmvnic_sub_crq_queue *scrq, 3390 bool do_h_free) 3391 { 3392 struct device *dev = &adapter->vdev->dev; 3393 long rc; 3394 3395 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3396 3397 if (do_h_free) { 3398 /* Close the sub-crqs */ 3399 do { 3400 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3401 adapter->vdev->unit_address, 3402 scrq->crq_num); 3403 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3404 3405 if (rc) { 3406 netdev_err(adapter->netdev, 3407 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3408 scrq->crq_num, rc); 3409 } 3410 } 3411 3412 dma_free_coherent(dev, 3413 IBMVNIC_IND_ARR_SZ, 3414 scrq->ind_buf.indir_arr, 3415 scrq->ind_buf.indir_dma); 3416 3417 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3418 DMA_BIDIRECTIONAL); 3419 free_pages((unsigned long)scrq->msgs, 2); 3420 kfree(scrq); 3421 } 3422 3423 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3424 *adapter) 3425 { 3426 struct device *dev = &adapter->vdev->dev; 3427 struct ibmvnic_sub_crq_queue *scrq; 3428 int rc; 3429 3430 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3431 if (!scrq) 3432 return NULL; 3433 3434 scrq->msgs = 3435 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3436 if (!scrq->msgs) { 3437 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3438 goto zero_page_failed; 3439 } 3440 3441 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3442 DMA_BIDIRECTIONAL); 3443 if (dma_mapping_error(dev, scrq->msg_token)) { 3444 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3445 goto map_failed; 3446 } 3447 3448 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3449 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3450 3451 if (rc == H_RESOURCE) 3452 rc = ibmvnic_reset_crq(adapter); 3453 3454 if (rc == H_CLOSED) { 3455 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3456 } else if (rc) { 3457 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3458 goto reg_failed; 3459 } 3460 3461 scrq->adapter = adapter; 3462 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3463 scrq->ind_buf.index = 0; 3464 3465 scrq->ind_buf.indir_arr = 3466 dma_alloc_coherent(dev, 3467 IBMVNIC_IND_ARR_SZ, 3468 &scrq->ind_buf.indir_dma, 3469 GFP_KERNEL); 3470 3471 if (!scrq->ind_buf.indir_arr) 3472 goto indir_failed; 3473 3474 spin_lock_init(&scrq->lock); 3475 3476 netdev_dbg(adapter->netdev, 3477 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3478 scrq->crq_num, scrq->hw_irq, scrq->irq); 3479 3480 return scrq; 3481 3482 indir_failed: 3483 do { 3484 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3485 adapter->vdev->unit_address, 3486 scrq->crq_num); 3487 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3488 reg_failed: 3489 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3490 DMA_BIDIRECTIONAL); 3491 map_failed: 3492 free_pages((unsigned long)scrq->msgs, 2); 3493 zero_page_failed: 3494 kfree(scrq); 3495 3496 return NULL; 3497 } 3498 3499 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3500 { 3501 int i; 3502 3503 if (adapter->tx_scrq) { 3504 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3505 if (!adapter->tx_scrq[i]) 3506 continue; 3507 3508 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3509 i); 3510 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3511 if (adapter->tx_scrq[i]->irq) { 3512 free_irq(adapter->tx_scrq[i]->irq, 3513 adapter->tx_scrq[i]); 3514 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3515 adapter->tx_scrq[i]->irq = 0; 3516 } 3517 3518 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3519 do_h_free); 3520 } 3521 3522 kfree(adapter->tx_scrq); 3523 adapter->tx_scrq = NULL; 3524 adapter->num_active_tx_scrqs = 0; 3525 } 3526 3527 if (adapter->rx_scrq) { 3528 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3529 if (!adapter->rx_scrq[i]) 3530 continue; 3531 3532 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3533 i); 3534 if (adapter->rx_scrq[i]->irq) { 3535 free_irq(adapter->rx_scrq[i]->irq, 3536 adapter->rx_scrq[i]); 3537 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3538 adapter->rx_scrq[i]->irq = 0; 3539 } 3540 3541 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3542 do_h_free); 3543 } 3544 3545 kfree(adapter->rx_scrq); 3546 adapter->rx_scrq = NULL; 3547 adapter->num_active_rx_scrqs = 0; 3548 } 3549 } 3550 3551 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3552 struct ibmvnic_sub_crq_queue *scrq) 3553 { 3554 struct device *dev = &adapter->vdev->dev; 3555 unsigned long rc; 3556 3557 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3558 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3559 if (rc) 3560 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3561 scrq->hw_irq, rc); 3562 return rc; 3563 } 3564 3565 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3566 struct ibmvnic_sub_crq_queue *scrq) 3567 { 3568 struct device *dev = &adapter->vdev->dev; 3569 unsigned long rc; 3570 3571 if (scrq->hw_irq > 0x100000000ULL) { 3572 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3573 return 1; 3574 } 3575 3576 if (test_bit(0, &adapter->resetting) && 3577 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3578 u64 val = (0xff000000) | scrq->hw_irq; 3579 3580 rc = plpar_hcall_norets(H_EOI, val); 3581 /* H_EOI would fail with rc = H_FUNCTION when running 3582 * in XIVE mode which is expected, but not an error. 3583 */ 3584 if (rc && (rc != H_FUNCTION)) 3585 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3586 val, rc); 3587 } 3588 3589 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3590 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3591 if (rc) 3592 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3593 scrq->hw_irq, rc); 3594 return rc; 3595 } 3596 3597 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3598 struct ibmvnic_sub_crq_queue *scrq) 3599 { 3600 struct device *dev = &adapter->vdev->dev; 3601 struct ibmvnic_tx_pool *tx_pool; 3602 struct ibmvnic_tx_buff *txbuff; 3603 struct netdev_queue *txq; 3604 union sub_crq *next; 3605 int index; 3606 int i; 3607 3608 restart_loop: 3609 while (pending_scrq(adapter, scrq)) { 3610 unsigned int pool = scrq->pool_index; 3611 int num_entries = 0; 3612 int total_bytes = 0; 3613 int num_packets = 0; 3614 3615 next = ibmvnic_next_scrq(adapter, scrq); 3616 for (i = 0; i < next->tx_comp.num_comps; i++) { 3617 index = be32_to_cpu(next->tx_comp.correlators[i]); 3618 if (index & IBMVNIC_TSO_POOL_MASK) { 3619 tx_pool = &adapter->tso_pool[pool]; 3620 index &= ~IBMVNIC_TSO_POOL_MASK; 3621 } else { 3622 tx_pool = &adapter->tx_pool[pool]; 3623 } 3624 3625 txbuff = &tx_pool->tx_buff[index]; 3626 num_packets++; 3627 num_entries += txbuff->num_entries; 3628 if (txbuff->skb) { 3629 total_bytes += txbuff->skb->len; 3630 if (next->tx_comp.rcs[i]) { 3631 dev_err(dev, "tx error %x\n", 3632 next->tx_comp.rcs[i]); 3633 dev_kfree_skb_irq(txbuff->skb); 3634 } else { 3635 dev_consume_skb_irq(txbuff->skb); 3636 } 3637 txbuff->skb = NULL; 3638 } else { 3639 netdev_warn(adapter->netdev, 3640 "TX completion received with NULL socket buffer\n"); 3641 } 3642 tx_pool->free_map[tx_pool->producer_index] = index; 3643 tx_pool->producer_index = 3644 (tx_pool->producer_index + 1) % 3645 tx_pool->num_buffers; 3646 } 3647 /* remove tx_comp scrq*/ 3648 next->tx_comp.first = 0; 3649 3650 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3651 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3652 3653 if (atomic_sub_return(num_entries, &scrq->used) <= 3654 (adapter->req_tx_entries_per_subcrq / 2) && 3655 __netif_subqueue_stopped(adapter->netdev, 3656 scrq->pool_index)) { 3657 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3658 netdev_dbg(adapter->netdev, "Started queue %d\n", 3659 scrq->pool_index); 3660 } 3661 } 3662 3663 enable_scrq_irq(adapter, scrq); 3664 3665 if (pending_scrq(adapter, scrq)) { 3666 disable_scrq_irq(adapter, scrq); 3667 goto restart_loop; 3668 } 3669 3670 return 0; 3671 } 3672 3673 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3674 { 3675 struct ibmvnic_sub_crq_queue *scrq = instance; 3676 struct ibmvnic_adapter *adapter = scrq->adapter; 3677 3678 disable_scrq_irq(adapter, scrq); 3679 ibmvnic_complete_tx(adapter, scrq); 3680 3681 return IRQ_HANDLED; 3682 } 3683 3684 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3685 { 3686 struct ibmvnic_sub_crq_queue *scrq = instance; 3687 struct ibmvnic_adapter *adapter = scrq->adapter; 3688 3689 /* When booting a kdump kernel we can hit pending interrupts 3690 * prior to completing driver initialization. 3691 */ 3692 if (unlikely(adapter->state != VNIC_OPEN)) 3693 return IRQ_NONE; 3694 3695 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3696 3697 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3698 disable_scrq_irq(adapter, scrq); 3699 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3700 } 3701 3702 return IRQ_HANDLED; 3703 } 3704 3705 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3706 { 3707 struct device *dev = &adapter->vdev->dev; 3708 struct ibmvnic_sub_crq_queue *scrq; 3709 int i = 0, j = 0; 3710 int rc = 0; 3711 3712 for (i = 0; i < adapter->req_tx_queues; i++) { 3713 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3714 i); 3715 scrq = adapter->tx_scrq[i]; 3716 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3717 3718 if (!scrq->irq) { 3719 rc = -EINVAL; 3720 dev_err(dev, "Error mapping irq\n"); 3721 goto req_tx_irq_failed; 3722 } 3723 3724 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3725 adapter->vdev->unit_address, i); 3726 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3727 0, scrq->name, scrq); 3728 3729 if (rc) { 3730 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3731 scrq->irq, rc); 3732 irq_dispose_mapping(scrq->irq); 3733 goto req_tx_irq_failed; 3734 } 3735 } 3736 3737 for (i = 0; i < adapter->req_rx_queues; i++) { 3738 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3739 i); 3740 scrq = adapter->rx_scrq[i]; 3741 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3742 if (!scrq->irq) { 3743 rc = -EINVAL; 3744 dev_err(dev, "Error mapping irq\n"); 3745 goto req_rx_irq_failed; 3746 } 3747 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3748 adapter->vdev->unit_address, i); 3749 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3750 0, scrq->name, scrq); 3751 if (rc) { 3752 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3753 scrq->irq, rc); 3754 irq_dispose_mapping(scrq->irq); 3755 goto req_rx_irq_failed; 3756 } 3757 } 3758 return rc; 3759 3760 req_rx_irq_failed: 3761 for (j = 0; j < i; j++) { 3762 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3763 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3764 } 3765 i = adapter->req_tx_queues; 3766 req_tx_irq_failed: 3767 for (j = 0; j < i; j++) { 3768 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3769 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3770 } 3771 release_sub_crqs(adapter, 1); 3772 return rc; 3773 } 3774 3775 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3776 { 3777 struct device *dev = &adapter->vdev->dev; 3778 struct ibmvnic_sub_crq_queue **allqueues; 3779 int registered_queues = 0; 3780 int total_queues; 3781 int more = 0; 3782 int i; 3783 3784 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3785 3786 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3787 if (!allqueues) 3788 return -ENOMEM; 3789 3790 for (i = 0; i < total_queues; i++) { 3791 allqueues[i] = init_sub_crq_queue(adapter); 3792 if (!allqueues[i]) { 3793 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3794 break; 3795 } 3796 registered_queues++; 3797 } 3798 3799 /* Make sure we were able to register the minimum number of queues */ 3800 if (registered_queues < 3801 adapter->min_tx_queues + adapter->min_rx_queues) { 3802 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3803 goto tx_failed; 3804 } 3805 3806 /* Distribute the failed allocated queues*/ 3807 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3808 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3809 switch (i % 3) { 3810 case 0: 3811 if (adapter->req_rx_queues > adapter->min_rx_queues) 3812 adapter->req_rx_queues--; 3813 else 3814 more++; 3815 break; 3816 case 1: 3817 if (adapter->req_tx_queues > adapter->min_tx_queues) 3818 adapter->req_tx_queues--; 3819 else 3820 more++; 3821 break; 3822 } 3823 } 3824 3825 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3826 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3827 if (!adapter->tx_scrq) 3828 goto tx_failed; 3829 3830 for (i = 0; i < adapter->req_tx_queues; i++) { 3831 adapter->tx_scrq[i] = allqueues[i]; 3832 adapter->tx_scrq[i]->pool_index = i; 3833 adapter->num_active_tx_scrqs++; 3834 } 3835 3836 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3837 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3838 if (!adapter->rx_scrq) 3839 goto rx_failed; 3840 3841 for (i = 0; i < adapter->req_rx_queues; i++) { 3842 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3843 adapter->rx_scrq[i]->scrq_num = i; 3844 adapter->num_active_rx_scrqs++; 3845 } 3846 3847 kfree(allqueues); 3848 return 0; 3849 3850 rx_failed: 3851 kfree(adapter->tx_scrq); 3852 adapter->tx_scrq = NULL; 3853 tx_failed: 3854 for (i = 0; i < registered_queues; i++) 3855 release_sub_crq_queue(adapter, allqueues[i], 1); 3856 kfree(allqueues); 3857 return -ENOMEM; 3858 } 3859 3860 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3861 { 3862 struct device *dev = &adapter->vdev->dev; 3863 union ibmvnic_crq crq; 3864 int max_entries; 3865 int cap_reqs; 3866 3867 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 3868 * the PROMISC flag). Initialize this count upfront. When the tasklet 3869 * receives a response to all of these, it will send the next protocol 3870 * message (QUERY_IP_OFFLOAD). 3871 */ 3872 if (!(adapter->netdev->flags & IFF_PROMISC) || 3873 adapter->promisc_supported) 3874 cap_reqs = 7; 3875 else 3876 cap_reqs = 6; 3877 3878 if (!retry) { 3879 /* Sub-CRQ entries are 32 byte long */ 3880 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3881 3882 atomic_set(&adapter->running_cap_crqs, cap_reqs); 3883 3884 if (adapter->min_tx_entries_per_subcrq > entries_page || 3885 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3886 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3887 return; 3888 } 3889 3890 if (adapter->desired.mtu) 3891 adapter->req_mtu = adapter->desired.mtu; 3892 else 3893 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3894 3895 if (!adapter->desired.tx_entries) 3896 adapter->desired.tx_entries = 3897 adapter->max_tx_entries_per_subcrq; 3898 if (!adapter->desired.rx_entries) 3899 adapter->desired.rx_entries = 3900 adapter->max_rx_add_entries_per_subcrq; 3901 3902 max_entries = IBMVNIC_MAX_LTB_SIZE / 3903 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3904 3905 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3906 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3907 adapter->desired.tx_entries = max_entries; 3908 } 3909 3910 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3911 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3912 adapter->desired.rx_entries = max_entries; 3913 } 3914 3915 if (adapter->desired.tx_entries) 3916 adapter->req_tx_entries_per_subcrq = 3917 adapter->desired.tx_entries; 3918 else 3919 adapter->req_tx_entries_per_subcrq = 3920 adapter->max_tx_entries_per_subcrq; 3921 3922 if (adapter->desired.rx_entries) 3923 adapter->req_rx_add_entries_per_subcrq = 3924 adapter->desired.rx_entries; 3925 else 3926 adapter->req_rx_add_entries_per_subcrq = 3927 adapter->max_rx_add_entries_per_subcrq; 3928 3929 if (adapter->desired.tx_queues) 3930 adapter->req_tx_queues = 3931 adapter->desired.tx_queues; 3932 else 3933 adapter->req_tx_queues = 3934 adapter->opt_tx_comp_sub_queues; 3935 3936 if (adapter->desired.rx_queues) 3937 adapter->req_rx_queues = 3938 adapter->desired.rx_queues; 3939 else 3940 adapter->req_rx_queues = 3941 adapter->opt_rx_comp_queues; 3942 3943 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3944 } else { 3945 atomic_add(cap_reqs, &adapter->running_cap_crqs); 3946 } 3947 memset(&crq, 0, sizeof(crq)); 3948 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3949 crq.request_capability.cmd = REQUEST_CAPABILITY; 3950 3951 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3952 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3953 cap_reqs--; 3954 ibmvnic_send_crq(adapter, &crq); 3955 3956 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3957 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3958 cap_reqs--; 3959 ibmvnic_send_crq(adapter, &crq); 3960 3961 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3962 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3963 cap_reqs--; 3964 ibmvnic_send_crq(adapter, &crq); 3965 3966 crq.request_capability.capability = 3967 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3968 crq.request_capability.number = 3969 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3970 cap_reqs--; 3971 ibmvnic_send_crq(adapter, &crq); 3972 3973 crq.request_capability.capability = 3974 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3975 crq.request_capability.number = 3976 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3977 cap_reqs--; 3978 ibmvnic_send_crq(adapter, &crq); 3979 3980 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3981 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3982 cap_reqs--; 3983 ibmvnic_send_crq(adapter, &crq); 3984 3985 if (adapter->netdev->flags & IFF_PROMISC) { 3986 if (adapter->promisc_supported) { 3987 crq.request_capability.capability = 3988 cpu_to_be16(PROMISC_REQUESTED); 3989 crq.request_capability.number = cpu_to_be64(1); 3990 cap_reqs--; 3991 ibmvnic_send_crq(adapter, &crq); 3992 } 3993 } else { 3994 crq.request_capability.capability = 3995 cpu_to_be16(PROMISC_REQUESTED); 3996 crq.request_capability.number = cpu_to_be64(0); 3997 cap_reqs--; 3998 ibmvnic_send_crq(adapter, &crq); 3999 } 4000 4001 /* Keep at end to catch any discrepancy between expected and actual 4002 * CRQs sent. 4003 */ 4004 WARN_ON(cap_reqs != 0); 4005 } 4006 4007 static int pending_scrq(struct ibmvnic_adapter *adapter, 4008 struct ibmvnic_sub_crq_queue *scrq) 4009 { 4010 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4011 int rc; 4012 4013 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4014 4015 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4016 * contents of the SCRQ descriptor 4017 */ 4018 dma_rmb(); 4019 4020 return rc; 4021 } 4022 4023 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4024 struct ibmvnic_sub_crq_queue *scrq) 4025 { 4026 union sub_crq *entry; 4027 unsigned long flags; 4028 4029 spin_lock_irqsave(&scrq->lock, flags); 4030 entry = &scrq->msgs[scrq->cur]; 4031 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4032 if (++scrq->cur == scrq->size) 4033 scrq->cur = 0; 4034 } else { 4035 entry = NULL; 4036 } 4037 spin_unlock_irqrestore(&scrq->lock, flags); 4038 4039 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4040 * contents of the SCRQ descriptor 4041 */ 4042 dma_rmb(); 4043 4044 return entry; 4045 } 4046 4047 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4048 { 4049 struct ibmvnic_crq_queue *queue = &adapter->crq; 4050 union ibmvnic_crq *crq; 4051 4052 crq = &queue->msgs[queue->cur]; 4053 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4054 if (++queue->cur == queue->size) 4055 queue->cur = 0; 4056 } else { 4057 crq = NULL; 4058 } 4059 4060 return crq; 4061 } 4062 4063 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4064 { 4065 switch (rc) { 4066 case H_PARAMETER: 4067 dev_warn_ratelimited(dev, 4068 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4069 func, rc); 4070 break; 4071 case H_CLOSED: 4072 dev_warn_ratelimited(dev, 4073 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4074 func, rc); 4075 break; 4076 default: 4077 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4078 break; 4079 } 4080 } 4081 4082 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4083 u64 remote_handle, u64 ioba, u64 num_entries) 4084 { 4085 unsigned int ua = adapter->vdev->unit_address; 4086 struct device *dev = &adapter->vdev->dev; 4087 int rc; 4088 4089 /* Make sure the hypervisor sees the complete request */ 4090 dma_wmb(); 4091 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4092 cpu_to_be64(remote_handle), 4093 ioba, num_entries); 4094 4095 if (rc) 4096 print_subcrq_error(dev, rc, __func__); 4097 4098 return rc; 4099 } 4100 4101 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4102 union ibmvnic_crq *crq) 4103 { 4104 unsigned int ua = adapter->vdev->unit_address; 4105 struct device *dev = &adapter->vdev->dev; 4106 u64 *u64_crq = (u64 *)crq; 4107 int rc; 4108 4109 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4110 (unsigned long)cpu_to_be64(u64_crq[0]), 4111 (unsigned long)cpu_to_be64(u64_crq[1])); 4112 4113 if (!adapter->crq.active && 4114 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4115 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4116 return -EINVAL; 4117 } 4118 4119 /* Make sure the hypervisor sees the complete request */ 4120 dma_wmb(); 4121 4122 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4123 cpu_to_be64(u64_crq[0]), 4124 cpu_to_be64(u64_crq[1])); 4125 4126 if (rc) { 4127 if (rc == H_CLOSED) { 4128 dev_warn(dev, "CRQ Queue closed\n"); 4129 /* do not reset, report the fail, wait for passive init from server */ 4130 } 4131 4132 dev_warn(dev, "Send error (rc=%d)\n", rc); 4133 } 4134 4135 return rc; 4136 } 4137 4138 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4139 { 4140 struct device *dev = &adapter->vdev->dev; 4141 union ibmvnic_crq crq; 4142 int retries = 100; 4143 int rc; 4144 4145 memset(&crq, 0, sizeof(crq)); 4146 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4147 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4148 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4149 4150 do { 4151 rc = ibmvnic_send_crq(adapter, &crq); 4152 if (rc != H_CLOSED) 4153 break; 4154 retries--; 4155 msleep(50); 4156 4157 } while (retries > 0); 4158 4159 if (rc) { 4160 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4161 return rc; 4162 } 4163 4164 return 0; 4165 } 4166 4167 struct vnic_login_client_data { 4168 u8 type; 4169 __be16 len; 4170 char name[]; 4171 } __packed; 4172 4173 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4174 { 4175 int len; 4176 4177 /* Calculate the amount of buffer space needed for the 4178 * vnic client data in the login buffer. There are four entries, 4179 * OS name, LPAR name, device name, and a null last entry. 4180 */ 4181 len = 4 * sizeof(struct vnic_login_client_data); 4182 len += 6; /* "Linux" plus NULL */ 4183 len += strlen(utsname()->nodename) + 1; 4184 len += strlen(adapter->netdev->name) + 1; 4185 4186 return len; 4187 } 4188 4189 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4190 struct vnic_login_client_data *vlcd) 4191 { 4192 const char *os_name = "Linux"; 4193 int len; 4194 4195 /* Type 1 - LPAR OS */ 4196 vlcd->type = 1; 4197 len = strlen(os_name) + 1; 4198 vlcd->len = cpu_to_be16(len); 4199 strscpy(vlcd->name, os_name, len); 4200 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4201 4202 /* Type 2 - LPAR name */ 4203 vlcd->type = 2; 4204 len = strlen(utsname()->nodename) + 1; 4205 vlcd->len = cpu_to_be16(len); 4206 strscpy(vlcd->name, utsname()->nodename, len); 4207 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4208 4209 /* Type 3 - device name */ 4210 vlcd->type = 3; 4211 len = strlen(adapter->netdev->name) + 1; 4212 vlcd->len = cpu_to_be16(len); 4213 strscpy(vlcd->name, adapter->netdev->name, len); 4214 } 4215 4216 static int send_login(struct ibmvnic_adapter *adapter) 4217 { 4218 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4219 struct ibmvnic_login_buffer *login_buffer; 4220 struct device *dev = &adapter->vdev->dev; 4221 struct vnic_login_client_data *vlcd; 4222 dma_addr_t rsp_buffer_token; 4223 dma_addr_t buffer_token; 4224 size_t rsp_buffer_size; 4225 union ibmvnic_crq crq; 4226 int client_data_len; 4227 size_t buffer_size; 4228 __be64 *tx_list_p; 4229 __be64 *rx_list_p; 4230 int rc; 4231 int i; 4232 4233 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4234 netdev_err(adapter->netdev, 4235 "RX or TX queues are not allocated, device login failed\n"); 4236 return -ENOMEM; 4237 } 4238 4239 release_login_buffer(adapter); 4240 release_login_rsp_buffer(adapter); 4241 4242 client_data_len = vnic_client_data_len(adapter); 4243 4244 buffer_size = 4245 sizeof(struct ibmvnic_login_buffer) + 4246 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4247 client_data_len; 4248 4249 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4250 if (!login_buffer) 4251 goto buf_alloc_failed; 4252 4253 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4254 DMA_TO_DEVICE); 4255 if (dma_mapping_error(dev, buffer_token)) { 4256 dev_err(dev, "Couldn't map login buffer\n"); 4257 goto buf_map_failed; 4258 } 4259 4260 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4261 sizeof(u64) * adapter->req_tx_queues + 4262 sizeof(u64) * adapter->req_rx_queues + 4263 sizeof(u64) * adapter->req_rx_queues + 4264 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4265 4266 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4267 if (!login_rsp_buffer) 4268 goto buf_rsp_alloc_failed; 4269 4270 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4271 rsp_buffer_size, DMA_FROM_DEVICE); 4272 if (dma_mapping_error(dev, rsp_buffer_token)) { 4273 dev_err(dev, "Couldn't map login rsp buffer\n"); 4274 goto buf_rsp_map_failed; 4275 } 4276 4277 adapter->login_buf = login_buffer; 4278 adapter->login_buf_token = buffer_token; 4279 adapter->login_buf_sz = buffer_size; 4280 adapter->login_rsp_buf = login_rsp_buffer; 4281 adapter->login_rsp_buf_token = rsp_buffer_token; 4282 adapter->login_rsp_buf_sz = rsp_buffer_size; 4283 4284 login_buffer->len = cpu_to_be32(buffer_size); 4285 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4286 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4287 login_buffer->off_txcomp_subcrqs = 4288 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4289 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4290 login_buffer->off_rxcomp_subcrqs = 4291 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4292 sizeof(u64) * adapter->req_tx_queues); 4293 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4294 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4295 4296 tx_list_p = (__be64 *)((char *)login_buffer + 4297 sizeof(struct ibmvnic_login_buffer)); 4298 rx_list_p = (__be64 *)((char *)login_buffer + 4299 sizeof(struct ibmvnic_login_buffer) + 4300 sizeof(u64) * adapter->req_tx_queues); 4301 4302 for (i = 0; i < adapter->req_tx_queues; i++) { 4303 if (adapter->tx_scrq[i]) { 4304 tx_list_p[i] = 4305 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4306 } 4307 } 4308 4309 for (i = 0; i < adapter->req_rx_queues; i++) { 4310 if (adapter->rx_scrq[i]) { 4311 rx_list_p[i] = 4312 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4313 } 4314 } 4315 4316 /* Insert vNIC login client data */ 4317 vlcd = (struct vnic_login_client_data *) 4318 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4319 login_buffer->client_data_offset = 4320 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4321 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4322 4323 vnic_add_client_data(adapter, vlcd); 4324 4325 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4326 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4327 netdev_dbg(adapter->netdev, "%016lx\n", 4328 ((unsigned long *)(adapter->login_buf))[i]); 4329 } 4330 4331 memset(&crq, 0, sizeof(crq)); 4332 crq.login.first = IBMVNIC_CRQ_CMD; 4333 crq.login.cmd = LOGIN; 4334 crq.login.ioba = cpu_to_be32(buffer_token); 4335 crq.login.len = cpu_to_be32(buffer_size); 4336 4337 adapter->login_pending = true; 4338 rc = ibmvnic_send_crq(adapter, &crq); 4339 if (rc) { 4340 adapter->login_pending = false; 4341 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4342 goto buf_rsp_map_failed; 4343 } 4344 4345 return 0; 4346 4347 buf_rsp_map_failed: 4348 kfree(login_rsp_buffer); 4349 adapter->login_rsp_buf = NULL; 4350 buf_rsp_alloc_failed: 4351 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4352 buf_map_failed: 4353 kfree(login_buffer); 4354 adapter->login_buf = NULL; 4355 buf_alloc_failed: 4356 return -ENOMEM; 4357 } 4358 4359 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4360 u32 len, u8 map_id) 4361 { 4362 union ibmvnic_crq crq; 4363 4364 memset(&crq, 0, sizeof(crq)); 4365 crq.request_map.first = IBMVNIC_CRQ_CMD; 4366 crq.request_map.cmd = REQUEST_MAP; 4367 crq.request_map.map_id = map_id; 4368 crq.request_map.ioba = cpu_to_be32(addr); 4369 crq.request_map.len = cpu_to_be32(len); 4370 return ibmvnic_send_crq(adapter, &crq); 4371 } 4372 4373 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4374 { 4375 union ibmvnic_crq crq; 4376 4377 memset(&crq, 0, sizeof(crq)); 4378 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4379 crq.request_unmap.cmd = REQUEST_UNMAP; 4380 crq.request_unmap.map_id = map_id; 4381 return ibmvnic_send_crq(adapter, &crq); 4382 } 4383 4384 static void send_query_map(struct ibmvnic_adapter *adapter) 4385 { 4386 union ibmvnic_crq crq; 4387 4388 memset(&crq, 0, sizeof(crq)); 4389 crq.query_map.first = IBMVNIC_CRQ_CMD; 4390 crq.query_map.cmd = QUERY_MAP; 4391 ibmvnic_send_crq(adapter, &crq); 4392 } 4393 4394 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4395 static void send_query_cap(struct ibmvnic_adapter *adapter) 4396 { 4397 union ibmvnic_crq crq; 4398 int cap_reqs; 4399 4400 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4401 * upfront. When the tasklet receives a response to all of these, it 4402 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4403 */ 4404 cap_reqs = 25; 4405 4406 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4407 4408 memset(&crq, 0, sizeof(crq)); 4409 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4410 crq.query_capability.cmd = QUERY_CAPABILITY; 4411 4412 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4413 ibmvnic_send_crq(adapter, &crq); 4414 cap_reqs--; 4415 4416 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4417 ibmvnic_send_crq(adapter, &crq); 4418 cap_reqs--; 4419 4420 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4421 ibmvnic_send_crq(adapter, &crq); 4422 cap_reqs--; 4423 4424 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4425 ibmvnic_send_crq(adapter, &crq); 4426 cap_reqs--; 4427 4428 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4429 ibmvnic_send_crq(adapter, &crq); 4430 cap_reqs--; 4431 4432 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4433 ibmvnic_send_crq(adapter, &crq); 4434 cap_reqs--; 4435 4436 crq.query_capability.capability = 4437 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4438 ibmvnic_send_crq(adapter, &crq); 4439 cap_reqs--; 4440 4441 crq.query_capability.capability = 4442 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4443 ibmvnic_send_crq(adapter, &crq); 4444 cap_reqs--; 4445 4446 crq.query_capability.capability = 4447 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4448 ibmvnic_send_crq(adapter, &crq); 4449 cap_reqs--; 4450 4451 crq.query_capability.capability = 4452 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4453 ibmvnic_send_crq(adapter, &crq); 4454 cap_reqs--; 4455 4456 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4457 ibmvnic_send_crq(adapter, &crq); 4458 cap_reqs--; 4459 4460 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4461 ibmvnic_send_crq(adapter, &crq); 4462 cap_reqs--; 4463 4464 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4465 ibmvnic_send_crq(adapter, &crq); 4466 cap_reqs--; 4467 4468 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4469 ibmvnic_send_crq(adapter, &crq); 4470 cap_reqs--; 4471 4472 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4473 ibmvnic_send_crq(adapter, &crq); 4474 cap_reqs--; 4475 4476 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4477 ibmvnic_send_crq(adapter, &crq); 4478 cap_reqs--; 4479 4480 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4481 ibmvnic_send_crq(adapter, &crq); 4482 cap_reqs--; 4483 4484 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4485 ibmvnic_send_crq(adapter, &crq); 4486 cap_reqs--; 4487 4488 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4489 ibmvnic_send_crq(adapter, &crq); 4490 cap_reqs--; 4491 4492 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4493 ibmvnic_send_crq(adapter, &crq); 4494 cap_reqs--; 4495 4496 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4497 ibmvnic_send_crq(adapter, &crq); 4498 cap_reqs--; 4499 4500 crq.query_capability.capability = 4501 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4502 ibmvnic_send_crq(adapter, &crq); 4503 cap_reqs--; 4504 4505 crq.query_capability.capability = 4506 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4507 ibmvnic_send_crq(adapter, &crq); 4508 cap_reqs--; 4509 4510 crq.query_capability.capability = 4511 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4512 ibmvnic_send_crq(adapter, &crq); 4513 cap_reqs--; 4514 4515 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4516 4517 ibmvnic_send_crq(adapter, &crq); 4518 cap_reqs--; 4519 4520 /* Keep at end to catch any discrepancy between expected and actual 4521 * CRQs sent. 4522 */ 4523 WARN_ON(cap_reqs != 0); 4524 } 4525 4526 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4527 { 4528 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4529 struct device *dev = &adapter->vdev->dev; 4530 union ibmvnic_crq crq; 4531 4532 adapter->ip_offload_tok = 4533 dma_map_single(dev, 4534 &adapter->ip_offload_buf, 4535 buf_sz, 4536 DMA_FROM_DEVICE); 4537 4538 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4539 if (!firmware_has_feature(FW_FEATURE_CMO)) 4540 dev_err(dev, "Couldn't map offload buffer\n"); 4541 return; 4542 } 4543 4544 memset(&crq, 0, sizeof(crq)); 4545 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4546 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4547 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4548 crq.query_ip_offload.ioba = 4549 cpu_to_be32(adapter->ip_offload_tok); 4550 4551 ibmvnic_send_crq(adapter, &crq); 4552 } 4553 4554 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4555 { 4556 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4557 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4558 struct device *dev = &adapter->vdev->dev; 4559 netdev_features_t old_hw_features = 0; 4560 union ibmvnic_crq crq; 4561 4562 adapter->ip_offload_ctrl_tok = 4563 dma_map_single(dev, 4564 ctrl_buf, 4565 sizeof(adapter->ip_offload_ctrl), 4566 DMA_TO_DEVICE); 4567 4568 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4569 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4570 return; 4571 } 4572 4573 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4574 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4575 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4576 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4577 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4578 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4579 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4580 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4581 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4582 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4583 4584 /* large_rx disabled for now, additional features needed */ 4585 ctrl_buf->large_rx_ipv4 = 0; 4586 ctrl_buf->large_rx_ipv6 = 0; 4587 4588 if (adapter->state != VNIC_PROBING) { 4589 old_hw_features = adapter->netdev->hw_features; 4590 adapter->netdev->hw_features = 0; 4591 } 4592 4593 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4594 4595 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4596 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4597 4598 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4599 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4600 4601 if ((adapter->netdev->features & 4602 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4603 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4604 4605 if (buf->large_tx_ipv4) 4606 adapter->netdev->hw_features |= NETIF_F_TSO; 4607 if (buf->large_tx_ipv6) 4608 adapter->netdev->hw_features |= NETIF_F_TSO6; 4609 4610 if (adapter->state == VNIC_PROBING) { 4611 adapter->netdev->features |= adapter->netdev->hw_features; 4612 } else if (old_hw_features != adapter->netdev->hw_features) { 4613 netdev_features_t tmp = 0; 4614 4615 /* disable features no longer supported */ 4616 adapter->netdev->features &= adapter->netdev->hw_features; 4617 /* turn on features now supported if previously enabled */ 4618 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4619 adapter->netdev->hw_features; 4620 adapter->netdev->features |= 4621 tmp & adapter->netdev->wanted_features; 4622 } 4623 4624 memset(&crq, 0, sizeof(crq)); 4625 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4626 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4627 crq.control_ip_offload.len = 4628 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4629 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4630 ibmvnic_send_crq(adapter, &crq); 4631 } 4632 4633 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4634 struct ibmvnic_adapter *adapter) 4635 { 4636 struct device *dev = &adapter->vdev->dev; 4637 4638 if (crq->get_vpd_size_rsp.rc.code) { 4639 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4640 crq->get_vpd_size_rsp.rc.code); 4641 complete(&adapter->fw_done); 4642 return; 4643 } 4644 4645 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4646 complete(&adapter->fw_done); 4647 } 4648 4649 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4650 struct ibmvnic_adapter *adapter) 4651 { 4652 struct device *dev = &adapter->vdev->dev; 4653 unsigned char *substr = NULL; 4654 u8 fw_level_len = 0; 4655 4656 memset(adapter->fw_version, 0, 32); 4657 4658 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4659 DMA_FROM_DEVICE); 4660 4661 if (crq->get_vpd_rsp.rc.code) { 4662 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4663 crq->get_vpd_rsp.rc.code); 4664 goto complete; 4665 } 4666 4667 /* get the position of the firmware version info 4668 * located after the ASCII 'RM' substring in the buffer 4669 */ 4670 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4671 if (!substr) { 4672 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4673 goto complete; 4674 } 4675 4676 /* get length of firmware level ASCII substring */ 4677 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4678 fw_level_len = *(substr + 2); 4679 } else { 4680 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4681 goto complete; 4682 } 4683 4684 /* copy firmware version string from vpd into adapter */ 4685 if ((substr + 3 + fw_level_len) < 4686 (adapter->vpd->buff + adapter->vpd->len)) { 4687 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4688 } else { 4689 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4690 } 4691 4692 complete: 4693 if (adapter->fw_version[0] == '\0') 4694 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4695 complete(&adapter->fw_done); 4696 } 4697 4698 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4699 { 4700 struct device *dev = &adapter->vdev->dev; 4701 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4702 int i; 4703 4704 dma_unmap_single(dev, adapter->ip_offload_tok, 4705 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4706 4707 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4708 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4709 netdev_dbg(adapter->netdev, "%016lx\n", 4710 ((unsigned long *)(buf))[i]); 4711 4712 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4713 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4714 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4715 buf->tcp_ipv4_chksum); 4716 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4717 buf->tcp_ipv6_chksum); 4718 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4719 buf->udp_ipv4_chksum); 4720 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4721 buf->udp_ipv6_chksum); 4722 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4723 buf->large_tx_ipv4); 4724 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4725 buf->large_tx_ipv6); 4726 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4727 buf->large_rx_ipv4); 4728 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4729 buf->large_rx_ipv6); 4730 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4731 buf->max_ipv4_header_size); 4732 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4733 buf->max_ipv6_header_size); 4734 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4735 buf->max_tcp_header_size); 4736 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4737 buf->max_udp_header_size); 4738 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4739 buf->max_large_tx_size); 4740 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4741 buf->max_large_rx_size); 4742 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4743 buf->ipv6_extension_header); 4744 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4745 buf->tcp_pseudosum_req); 4746 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4747 buf->num_ipv6_ext_headers); 4748 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4749 buf->off_ipv6_ext_headers); 4750 4751 send_control_ip_offload(adapter); 4752 } 4753 4754 static const char *ibmvnic_fw_err_cause(u16 cause) 4755 { 4756 switch (cause) { 4757 case ADAPTER_PROBLEM: 4758 return "adapter problem"; 4759 case BUS_PROBLEM: 4760 return "bus problem"; 4761 case FW_PROBLEM: 4762 return "firmware problem"; 4763 case DD_PROBLEM: 4764 return "device driver problem"; 4765 case EEH_RECOVERY: 4766 return "EEH recovery"; 4767 case FW_UPDATED: 4768 return "firmware updated"; 4769 case LOW_MEMORY: 4770 return "low Memory"; 4771 default: 4772 return "unknown"; 4773 } 4774 } 4775 4776 static void handle_error_indication(union ibmvnic_crq *crq, 4777 struct ibmvnic_adapter *adapter) 4778 { 4779 struct device *dev = &adapter->vdev->dev; 4780 u16 cause; 4781 4782 cause = be16_to_cpu(crq->error_indication.error_cause); 4783 4784 dev_warn_ratelimited(dev, 4785 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4786 crq->error_indication.flags 4787 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4788 ibmvnic_fw_err_cause(cause)); 4789 4790 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4791 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4792 else 4793 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4794 } 4795 4796 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4797 struct ibmvnic_adapter *adapter) 4798 { 4799 struct net_device *netdev = adapter->netdev; 4800 struct device *dev = &adapter->vdev->dev; 4801 long rc; 4802 4803 rc = crq->change_mac_addr_rsp.rc.code; 4804 if (rc) { 4805 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4806 goto out; 4807 } 4808 /* crq->change_mac_addr.mac_addr is the requested one 4809 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4810 */ 4811 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 4812 ether_addr_copy(adapter->mac_addr, 4813 &crq->change_mac_addr_rsp.mac_addr[0]); 4814 out: 4815 complete(&adapter->fw_done); 4816 return rc; 4817 } 4818 4819 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4820 struct ibmvnic_adapter *adapter) 4821 { 4822 struct device *dev = &adapter->vdev->dev; 4823 u64 *req_value; 4824 char *name; 4825 4826 atomic_dec(&adapter->running_cap_crqs); 4827 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 4828 atomic_read(&adapter->running_cap_crqs)); 4829 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4830 case REQ_TX_QUEUES: 4831 req_value = &adapter->req_tx_queues; 4832 name = "tx"; 4833 break; 4834 case REQ_RX_QUEUES: 4835 req_value = &adapter->req_rx_queues; 4836 name = "rx"; 4837 break; 4838 case REQ_RX_ADD_QUEUES: 4839 req_value = &adapter->req_rx_add_queues; 4840 name = "rx_add"; 4841 break; 4842 case REQ_TX_ENTRIES_PER_SUBCRQ: 4843 req_value = &adapter->req_tx_entries_per_subcrq; 4844 name = "tx_entries_per_subcrq"; 4845 break; 4846 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4847 req_value = &adapter->req_rx_add_entries_per_subcrq; 4848 name = "rx_add_entries_per_subcrq"; 4849 break; 4850 case REQ_MTU: 4851 req_value = &adapter->req_mtu; 4852 name = "mtu"; 4853 break; 4854 case PROMISC_REQUESTED: 4855 req_value = &adapter->promisc; 4856 name = "promisc"; 4857 break; 4858 default: 4859 dev_err(dev, "Got invalid cap request rsp %d\n", 4860 crq->request_capability.capability); 4861 return; 4862 } 4863 4864 switch (crq->request_capability_rsp.rc.code) { 4865 case SUCCESS: 4866 break; 4867 case PARTIALSUCCESS: 4868 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4869 *req_value, 4870 (long)be64_to_cpu(crq->request_capability_rsp.number), 4871 name); 4872 4873 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4874 REQ_MTU) { 4875 pr_err("mtu of %llu is not supported. Reverting.\n", 4876 *req_value); 4877 *req_value = adapter->fallback.mtu; 4878 } else { 4879 *req_value = 4880 be64_to_cpu(crq->request_capability_rsp.number); 4881 } 4882 4883 send_request_cap(adapter, 1); 4884 return; 4885 default: 4886 dev_err(dev, "Error %d in request cap rsp\n", 4887 crq->request_capability_rsp.rc.code); 4888 return; 4889 } 4890 4891 /* Done receiving requested capabilities, query IP offload support */ 4892 if (atomic_read(&adapter->running_cap_crqs) == 0) 4893 send_query_ip_offload(adapter); 4894 } 4895 4896 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4897 struct ibmvnic_adapter *adapter) 4898 { 4899 struct device *dev = &adapter->vdev->dev; 4900 struct net_device *netdev = adapter->netdev; 4901 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4902 struct ibmvnic_login_buffer *login = adapter->login_buf; 4903 u64 *tx_handle_array; 4904 u64 *rx_handle_array; 4905 int num_tx_pools; 4906 int num_rx_pools; 4907 u64 *size_array; 4908 int i; 4909 4910 /* CHECK: Test/set of login_pending does not need to be atomic 4911 * because only ibmvnic_tasklet tests/clears this. 4912 */ 4913 if (!adapter->login_pending) { 4914 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4915 return 0; 4916 } 4917 adapter->login_pending = false; 4918 4919 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4920 DMA_TO_DEVICE); 4921 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4922 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4923 4924 /* If the number of queues requested can't be allocated by the 4925 * server, the login response will return with code 1. We will need 4926 * to resend the login buffer with fewer queues requested. 4927 */ 4928 if (login_rsp_crq->generic.rc.code) { 4929 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4930 complete(&adapter->init_done); 4931 return 0; 4932 } 4933 4934 if (adapter->failover_pending) { 4935 adapter->init_done_rc = -EAGAIN; 4936 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 4937 complete(&adapter->init_done); 4938 /* login response buffer will be released on reset */ 4939 return 0; 4940 } 4941 4942 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4943 4944 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4945 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4946 netdev_dbg(adapter->netdev, "%016lx\n", 4947 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4948 } 4949 4950 /* Sanity checks */ 4951 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4952 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4953 adapter->req_rx_add_queues != 4954 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4955 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4956 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4957 return -EIO; 4958 } 4959 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4960 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4961 /* variable buffer sizes are not supported, so just read the 4962 * first entry. 4963 */ 4964 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4965 4966 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4967 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4968 4969 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4970 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4971 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4972 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4973 4974 for (i = 0; i < num_tx_pools; i++) 4975 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4976 4977 for (i = 0; i < num_rx_pools; i++) 4978 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4979 4980 adapter->num_active_tx_scrqs = num_tx_pools; 4981 adapter->num_active_rx_scrqs = num_rx_pools; 4982 release_login_rsp_buffer(adapter); 4983 release_login_buffer(adapter); 4984 complete(&adapter->init_done); 4985 4986 return 0; 4987 } 4988 4989 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4990 struct ibmvnic_adapter *adapter) 4991 { 4992 struct device *dev = &adapter->vdev->dev; 4993 long rc; 4994 4995 rc = crq->request_unmap_rsp.rc.code; 4996 if (rc) 4997 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4998 } 4999 5000 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5001 struct ibmvnic_adapter *adapter) 5002 { 5003 struct net_device *netdev = adapter->netdev; 5004 struct device *dev = &adapter->vdev->dev; 5005 long rc; 5006 5007 rc = crq->query_map_rsp.rc.code; 5008 if (rc) { 5009 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5010 return; 5011 } 5012 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5013 crq->query_map_rsp.page_size, 5014 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5015 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5016 } 5017 5018 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5019 struct ibmvnic_adapter *adapter) 5020 { 5021 struct net_device *netdev = adapter->netdev; 5022 struct device *dev = &adapter->vdev->dev; 5023 long rc; 5024 5025 atomic_dec(&adapter->running_cap_crqs); 5026 netdev_dbg(netdev, "Outstanding queries: %d\n", 5027 atomic_read(&adapter->running_cap_crqs)); 5028 rc = crq->query_capability.rc.code; 5029 if (rc) { 5030 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5031 goto out; 5032 } 5033 5034 switch (be16_to_cpu(crq->query_capability.capability)) { 5035 case MIN_TX_QUEUES: 5036 adapter->min_tx_queues = 5037 be64_to_cpu(crq->query_capability.number); 5038 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5039 adapter->min_tx_queues); 5040 break; 5041 case MIN_RX_QUEUES: 5042 adapter->min_rx_queues = 5043 be64_to_cpu(crq->query_capability.number); 5044 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5045 adapter->min_rx_queues); 5046 break; 5047 case MIN_RX_ADD_QUEUES: 5048 adapter->min_rx_add_queues = 5049 be64_to_cpu(crq->query_capability.number); 5050 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5051 adapter->min_rx_add_queues); 5052 break; 5053 case MAX_TX_QUEUES: 5054 adapter->max_tx_queues = 5055 be64_to_cpu(crq->query_capability.number); 5056 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5057 adapter->max_tx_queues); 5058 break; 5059 case MAX_RX_QUEUES: 5060 adapter->max_rx_queues = 5061 be64_to_cpu(crq->query_capability.number); 5062 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5063 adapter->max_rx_queues); 5064 break; 5065 case MAX_RX_ADD_QUEUES: 5066 adapter->max_rx_add_queues = 5067 be64_to_cpu(crq->query_capability.number); 5068 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5069 adapter->max_rx_add_queues); 5070 break; 5071 case MIN_TX_ENTRIES_PER_SUBCRQ: 5072 adapter->min_tx_entries_per_subcrq = 5073 be64_to_cpu(crq->query_capability.number); 5074 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5075 adapter->min_tx_entries_per_subcrq); 5076 break; 5077 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5078 adapter->min_rx_add_entries_per_subcrq = 5079 be64_to_cpu(crq->query_capability.number); 5080 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5081 adapter->min_rx_add_entries_per_subcrq); 5082 break; 5083 case MAX_TX_ENTRIES_PER_SUBCRQ: 5084 adapter->max_tx_entries_per_subcrq = 5085 be64_to_cpu(crq->query_capability.number); 5086 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5087 adapter->max_tx_entries_per_subcrq); 5088 break; 5089 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5090 adapter->max_rx_add_entries_per_subcrq = 5091 be64_to_cpu(crq->query_capability.number); 5092 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5093 adapter->max_rx_add_entries_per_subcrq); 5094 break; 5095 case TCP_IP_OFFLOAD: 5096 adapter->tcp_ip_offload = 5097 be64_to_cpu(crq->query_capability.number); 5098 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5099 adapter->tcp_ip_offload); 5100 break; 5101 case PROMISC_SUPPORTED: 5102 adapter->promisc_supported = 5103 be64_to_cpu(crq->query_capability.number); 5104 netdev_dbg(netdev, "promisc_supported = %lld\n", 5105 adapter->promisc_supported); 5106 break; 5107 case MIN_MTU: 5108 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5109 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5110 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5111 break; 5112 case MAX_MTU: 5113 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5114 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5115 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5116 break; 5117 case MAX_MULTICAST_FILTERS: 5118 adapter->max_multicast_filters = 5119 be64_to_cpu(crq->query_capability.number); 5120 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5121 adapter->max_multicast_filters); 5122 break; 5123 case VLAN_HEADER_INSERTION: 5124 adapter->vlan_header_insertion = 5125 be64_to_cpu(crq->query_capability.number); 5126 if (adapter->vlan_header_insertion) 5127 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5128 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5129 adapter->vlan_header_insertion); 5130 break; 5131 case RX_VLAN_HEADER_INSERTION: 5132 adapter->rx_vlan_header_insertion = 5133 be64_to_cpu(crq->query_capability.number); 5134 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5135 adapter->rx_vlan_header_insertion); 5136 break; 5137 case MAX_TX_SG_ENTRIES: 5138 adapter->max_tx_sg_entries = 5139 be64_to_cpu(crq->query_capability.number); 5140 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5141 adapter->max_tx_sg_entries); 5142 break; 5143 case RX_SG_SUPPORTED: 5144 adapter->rx_sg_supported = 5145 be64_to_cpu(crq->query_capability.number); 5146 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5147 adapter->rx_sg_supported); 5148 break; 5149 case OPT_TX_COMP_SUB_QUEUES: 5150 adapter->opt_tx_comp_sub_queues = 5151 be64_to_cpu(crq->query_capability.number); 5152 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5153 adapter->opt_tx_comp_sub_queues); 5154 break; 5155 case OPT_RX_COMP_QUEUES: 5156 adapter->opt_rx_comp_queues = 5157 be64_to_cpu(crq->query_capability.number); 5158 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5159 adapter->opt_rx_comp_queues); 5160 break; 5161 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5162 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5163 be64_to_cpu(crq->query_capability.number); 5164 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5165 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5166 break; 5167 case OPT_TX_ENTRIES_PER_SUBCRQ: 5168 adapter->opt_tx_entries_per_subcrq = 5169 be64_to_cpu(crq->query_capability.number); 5170 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5171 adapter->opt_tx_entries_per_subcrq); 5172 break; 5173 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5174 adapter->opt_rxba_entries_per_subcrq = 5175 be64_to_cpu(crq->query_capability.number); 5176 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5177 adapter->opt_rxba_entries_per_subcrq); 5178 break; 5179 case TX_RX_DESC_REQ: 5180 adapter->tx_rx_desc_req = crq->query_capability.number; 5181 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5182 adapter->tx_rx_desc_req); 5183 break; 5184 5185 default: 5186 netdev_err(netdev, "Got invalid cap rsp %d\n", 5187 crq->query_capability.capability); 5188 } 5189 5190 out: 5191 if (atomic_read(&adapter->running_cap_crqs) == 0) 5192 send_request_cap(adapter, 0); 5193 } 5194 5195 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5196 { 5197 union ibmvnic_crq crq; 5198 int rc; 5199 5200 memset(&crq, 0, sizeof(crq)); 5201 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5202 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5203 5204 mutex_lock(&adapter->fw_lock); 5205 adapter->fw_done_rc = 0; 5206 reinit_completion(&adapter->fw_done); 5207 5208 rc = ibmvnic_send_crq(adapter, &crq); 5209 if (rc) { 5210 mutex_unlock(&adapter->fw_lock); 5211 return rc; 5212 } 5213 5214 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5215 if (rc) { 5216 mutex_unlock(&adapter->fw_lock); 5217 return rc; 5218 } 5219 5220 mutex_unlock(&adapter->fw_lock); 5221 return adapter->fw_done_rc ? -EIO : 0; 5222 } 5223 5224 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5225 struct ibmvnic_adapter *adapter) 5226 { 5227 struct net_device *netdev = adapter->netdev; 5228 int rc; 5229 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5230 5231 rc = crq->query_phys_parms_rsp.rc.code; 5232 if (rc) { 5233 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5234 return rc; 5235 } 5236 switch (rspeed) { 5237 case IBMVNIC_10MBPS: 5238 adapter->speed = SPEED_10; 5239 break; 5240 case IBMVNIC_100MBPS: 5241 adapter->speed = SPEED_100; 5242 break; 5243 case IBMVNIC_1GBPS: 5244 adapter->speed = SPEED_1000; 5245 break; 5246 case IBMVNIC_10GBPS: 5247 adapter->speed = SPEED_10000; 5248 break; 5249 case IBMVNIC_25GBPS: 5250 adapter->speed = SPEED_25000; 5251 break; 5252 case IBMVNIC_40GBPS: 5253 adapter->speed = SPEED_40000; 5254 break; 5255 case IBMVNIC_50GBPS: 5256 adapter->speed = SPEED_50000; 5257 break; 5258 case IBMVNIC_100GBPS: 5259 adapter->speed = SPEED_100000; 5260 break; 5261 case IBMVNIC_200GBPS: 5262 adapter->speed = SPEED_200000; 5263 break; 5264 default: 5265 if (netif_carrier_ok(netdev)) 5266 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5267 adapter->speed = SPEED_UNKNOWN; 5268 } 5269 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5270 adapter->duplex = DUPLEX_FULL; 5271 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5272 adapter->duplex = DUPLEX_HALF; 5273 else 5274 adapter->duplex = DUPLEX_UNKNOWN; 5275 5276 return rc; 5277 } 5278 5279 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5280 struct ibmvnic_adapter *adapter) 5281 { 5282 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5283 struct net_device *netdev = adapter->netdev; 5284 struct device *dev = &adapter->vdev->dev; 5285 u64 *u64_crq = (u64 *)crq; 5286 long rc; 5287 5288 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5289 (unsigned long)cpu_to_be64(u64_crq[0]), 5290 (unsigned long)cpu_to_be64(u64_crq[1])); 5291 switch (gen_crq->first) { 5292 case IBMVNIC_CRQ_INIT_RSP: 5293 switch (gen_crq->cmd) { 5294 case IBMVNIC_CRQ_INIT: 5295 dev_info(dev, "Partner initialized\n"); 5296 adapter->from_passive_init = true; 5297 /* Discard any stale login responses from prev reset. 5298 * CHECK: should we clear even on INIT_COMPLETE? 5299 */ 5300 adapter->login_pending = false; 5301 5302 if (adapter->state == VNIC_DOWN) 5303 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5304 else 5305 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5306 5307 if (rc && rc != -EBUSY) { 5308 /* We were unable to schedule the failover 5309 * reset either because the adapter was still 5310 * probing (eg: during kexec) or we could not 5311 * allocate memory. Clear the failover_pending 5312 * flag since no one else will. We ignore 5313 * EBUSY because it means either FAILOVER reset 5314 * is already scheduled or the adapter is 5315 * being removed. 5316 */ 5317 netdev_err(netdev, 5318 "Error %ld scheduling failover reset\n", 5319 rc); 5320 adapter->failover_pending = false; 5321 } 5322 5323 if (!completion_done(&adapter->init_done)) { 5324 complete(&adapter->init_done); 5325 if (!adapter->init_done_rc) 5326 adapter->init_done_rc = -EAGAIN; 5327 } 5328 5329 break; 5330 case IBMVNIC_CRQ_INIT_COMPLETE: 5331 dev_info(dev, "Partner initialization complete\n"); 5332 adapter->crq.active = true; 5333 send_version_xchg(adapter); 5334 break; 5335 default: 5336 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5337 } 5338 return; 5339 case IBMVNIC_CRQ_XPORT_EVENT: 5340 netif_carrier_off(netdev); 5341 adapter->crq.active = false; 5342 /* terminate any thread waiting for a response 5343 * from the device 5344 */ 5345 if (!completion_done(&adapter->fw_done)) { 5346 adapter->fw_done_rc = -EIO; 5347 complete(&adapter->fw_done); 5348 } 5349 if (!completion_done(&adapter->stats_done)) 5350 complete(&adapter->stats_done); 5351 if (test_bit(0, &adapter->resetting)) 5352 adapter->force_reset_recovery = true; 5353 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5354 dev_info(dev, "Migrated, re-enabling adapter\n"); 5355 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5356 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5357 dev_info(dev, "Backing device failover detected\n"); 5358 adapter->failover_pending = true; 5359 } else { 5360 /* The adapter lost the connection */ 5361 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5362 gen_crq->cmd); 5363 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5364 } 5365 return; 5366 case IBMVNIC_CRQ_CMD_RSP: 5367 break; 5368 default: 5369 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5370 gen_crq->first); 5371 return; 5372 } 5373 5374 switch (gen_crq->cmd) { 5375 case VERSION_EXCHANGE_RSP: 5376 rc = crq->version_exchange_rsp.rc.code; 5377 if (rc) { 5378 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5379 break; 5380 } 5381 ibmvnic_version = 5382 be16_to_cpu(crq->version_exchange_rsp.version); 5383 dev_info(dev, "Partner protocol version is %d\n", 5384 ibmvnic_version); 5385 send_query_cap(adapter); 5386 break; 5387 case QUERY_CAPABILITY_RSP: 5388 handle_query_cap_rsp(crq, adapter); 5389 break; 5390 case QUERY_MAP_RSP: 5391 handle_query_map_rsp(crq, adapter); 5392 break; 5393 case REQUEST_MAP_RSP: 5394 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5395 complete(&adapter->fw_done); 5396 break; 5397 case REQUEST_UNMAP_RSP: 5398 handle_request_unmap_rsp(crq, adapter); 5399 break; 5400 case REQUEST_CAPABILITY_RSP: 5401 handle_request_cap_rsp(crq, adapter); 5402 break; 5403 case LOGIN_RSP: 5404 netdev_dbg(netdev, "Got Login Response\n"); 5405 handle_login_rsp(crq, adapter); 5406 break; 5407 case LOGICAL_LINK_STATE_RSP: 5408 netdev_dbg(netdev, 5409 "Got Logical Link State Response, state: %d rc: %d\n", 5410 crq->logical_link_state_rsp.link_state, 5411 crq->logical_link_state_rsp.rc.code); 5412 adapter->logical_link_state = 5413 crq->logical_link_state_rsp.link_state; 5414 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5415 complete(&adapter->init_done); 5416 break; 5417 case LINK_STATE_INDICATION: 5418 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5419 adapter->phys_link_state = 5420 crq->link_state_indication.phys_link_state; 5421 adapter->logical_link_state = 5422 crq->link_state_indication.logical_link_state; 5423 if (adapter->phys_link_state && adapter->logical_link_state) 5424 netif_carrier_on(netdev); 5425 else 5426 netif_carrier_off(netdev); 5427 break; 5428 case CHANGE_MAC_ADDR_RSP: 5429 netdev_dbg(netdev, "Got MAC address change Response\n"); 5430 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5431 break; 5432 case ERROR_INDICATION: 5433 netdev_dbg(netdev, "Got Error Indication\n"); 5434 handle_error_indication(crq, adapter); 5435 break; 5436 case REQUEST_STATISTICS_RSP: 5437 netdev_dbg(netdev, "Got Statistics Response\n"); 5438 complete(&adapter->stats_done); 5439 break; 5440 case QUERY_IP_OFFLOAD_RSP: 5441 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5442 handle_query_ip_offload_rsp(adapter); 5443 break; 5444 case MULTICAST_CTRL_RSP: 5445 netdev_dbg(netdev, "Got multicast control Response\n"); 5446 break; 5447 case CONTROL_IP_OFFLOAD_RSP: 5448 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5449 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5450 sizeof(adapter->ip_offload_ctrl), 5451 DMA_TO_DEVICE); 5452 complete(&adapter->init_done); 5453 break; 5454 case COLLECT_FW_TRACE_RSP: 5455 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5456 complete(&adapter->fw_done); 5457 break; 5458 case GET_VPD_SIZE_RSP: 5459 handle_vpd_size_rsp(crq, adapter); 5460 break; 5461 case GET_VPD_RSP: 5462 handle_vpd_rsp(crq, adapter); 5463 break; 5464 case QUERY_PHYS_PARMS_RSP: 5465 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5466 complete(&adapter->fw_done); 5467 break; 5468 default: 5469 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5470 gen_crq->cmd); 5471 } 5472 } 5473 5474 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5475 { 5476 struct ibmvnic_adapter *adapter = instance; 5477 5478 tasklet_schedule(&adapter->tasklet); 5479 return IRQ_HANDLED; 5480 } 5481 5482 static void ibmvnic_tasklet(struct tasklet_struct *t) 5483 { 5484 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5485 struct ibmvnic_crq_queue *queue = &adapter->crq; 5486 union ibmvnic_crq *crq; 5487 unsigned long flags; 5488 5489 spin_lock_irqsave(&queue->lock, flags); 5490 5491 /* Pull all the valid messages off the CRQ */ 5492 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5493 /* This barrier makes sure ibmvnic_next_crq()'s 5494 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5495 * before ibmvnic_handle_crq()'s 5496 * switch(gen_crq->first) and switch(gen_crq->cmd). 5497 */ 5498 dma_rmb(); 5499 ibmvnic_handle_crq(crq, adapter); 5500 crq->generic.first = 0; 5501 } 5502 5503 spin_unlock_irqrestore(&queue->lock, flags); 5504 } 5505 5506 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5507 { 5508 struct vio_dev *vdev = adapter->vdev; 5509 int rc; 5510 5511 do { 5512 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5513 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5514 5515 if (rc) 5516 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5517 5518 return rc; 5519 } 5520 5521 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5522 { 5523 struct ibmvnic_crq_queue *crq = &adapter->crq; 5524 struct device *dev = &adapter->vdev->dev; 5525 struct vio_dev *vdev = adapter->vdev; 5526 int rc; 5527 5528 /* Close the CRQ */ 5529 do { 5530 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5531 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5532 5533 /* Clean out the queue */ 5534 if (!crq->msgs) 5535 return -EINVAL; 5536 5537 memset(crq->msgs, 0, PAGE_SIZE); 5538 crq->cur = 0; 5539 crq->active = false; 5540 5541 /* And re-open it again */ 5542 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5543 crq->msg_token, PAGE_SIZE); 5544 5545 if (rc == H_CLOSED) 5546 /* Adapter is good, but other end is not ready */ 5547 dev_warn(dev, "Partner adapter not ready\n"); 5548 else if (rc != 0) 5549 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5550 5551 return rc; 5552 } 5553 5554 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5555 { 5556 struct ibmvnic_crq_queue *crq = &adapter->crq; 5557 struct vio_dev *vdev = adapter->vdev; 5558 long rc; 5559 5560 if (!crq->msgs) 5561 return; 5562 5563 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5564 free_irq(vdev->irq, adapter); 5565 tasklet_kill(&adapter->tasklet); 5566 do { 5567 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5568 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5569 5570 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5571 DMA_BIDIRECTIONAL); 5572 free_page((unsigned long)crq->msgs); 5573 crq->msgs = NULL; 5574 crq->active = false; 5575 } 5576 5577 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5578 { 5579 struct ibmvnic_crq_queue *crq = &adapter->crq; 5580 struct device *dev = &adapter->vdev->dev; 5581 struct vio_dev *vdev = adapter->vdev; 5582 int rc, retrc = -ENOMEM; 5583 5584 if (crq->msgs) 5585 return 0; 5586 5587 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5588 /* Should we allocate more than one page? */ 5589 5590 if (!crq->msgs) 5591 return -ENOMEM; 5592 5593 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5594 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5595 DMA_BIDIRECTIONAL); 5596 if (dma_mapping_error(dev, crq->msg_token)) 5597 goto map_failed; 5598 5599 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5600 crq->msg_token, PAGE_SIZE); 5601 5602 if (rc == H_RESOURCE) 5603 /* maybe kexecing and resource is busy. try a reset */ 5604 rc = ibmvnic_reset_crq(adapter); 5605 retrc = rc; 5606 5607 if (rc == H_CLOSED) { 5608 dev_warn(dev, "Partner adapter not ready\n"); 5609 } else if (rc) { 5610 dev_warn(dev, "Error %d opening adapter\n", rc); 5611 goto reg_crq_failed; 5612 } 5613 5614 retrc = 0; 5615 5616 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5617 5618 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5619 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5620 adapter->vdev->unit_address); 5621 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5622 if (rc) { 5623 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5624 vdev->irq, rc); 5625 goto req_irq_failed; 5626 } 5627 5628 rc = vio_enable_interrupts(vdev); 5629 if (rc) { 5630 dev_err(dev, "Error %d enabling interrupts\n", rc); 5631 goto req_irq_failed; 5632 } 5633 5634 crq->cur = 0; 5635 spin_lock_init(&crq->lock); 5636 5637 /* process any CRQs that were queued before we enabled interrupts */ 5638 tasklet_schedule(&adapter->tasklet); 5639 5640 return retrc; 5641 5642 req_irq_failed: 5643 tasklet_kill(&adapter->tasklet); 5644 do { 5645 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5646 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5647 reg_crq_failed: 5648 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5649 map_failed: 5650 free_page((unsigned long)crq->msgs); 5651 crq->msgs = NULL; 5652 return retrc; 5653 } 5654 5655 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5656 { 5657 struct device *dev = &adapter->vdev->dev; 5658 unsigned long timeout = msecs_to_jiffies(20000); 5659 u64 old_num_rx_queues = adapter->req_rx_queues; 5660 u64 old_num_tx_queues = adapter->req_tx_queues; 5661 int rc; 5662 5663 adapter->from_passive_init = false; 5664 5665 if (reset) 5666 reinit_completion(&adapter->init_done); 5667 5668 adapter->init_done_rc = 0; 5669 rc = ibmvnic_send_crq_init(adapter); 5670 if (rc) { 5671 dev_err(dev, "Send crq init failed with error %d\n", rc); 5672 return rc; 5673 } 5674 5675 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5676 dev_err(dev, "Initialization sequence timed out\n"); 5677 return -ETIMEDOUT; 5678 } 5679 5680 if (adapter->init_done_rc) { 5681 release_crq_queue(adapter); 5682 return adapter->init_done_rc; 5683 } 5684 5685 if (adapter->from_passive_init) { 5686 adapter->state = VNIC_OPEN; 5687 adapter->from_passive_init = false; 5688 return -EINVAL; 5689 } 5690 5691 if (reset && 5692 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5693 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5694 if (adapter->req_rx_queues != old_num_rx_queues || 5695 adapter->req_tx_queues != old_num_tx_queues) { 5696 release_sub_crqs(adapter, 0); 5697 rc = init_sub_crqs(adapter); 5698 } else { 5699 rc = reset_sub_crq_queues(adapter); 5700 } 5701 } else { 5702 rc = init_sub_crqs(adapter); 5703 } 5704 5705 if (rc) { 5706 dev_err(dev, "Initialization of sub crqs failed\n"); 5707 release_crq_queue(adapter); 5708 return rc; 5709 } 5710 5711 rc = init_sub_crq_irqs(adapter); 5712 if (rc) { 5713 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5714 release_crq_queue(adapter); 5715 } 5716 5717 return rc; 5718 } 5719 5720 static struct device_attribute dev_attr_failover; 5721 5722 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5723 { 5724 struct ibmvnic_adapter *adapter; 5725 struct net_device *netdev; 5726 unsigned char *mac_addr_p; 5727 bool init_success; 5728 int rc; 5729 5730 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5731 dev->unit_address); 5732 5733 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5734 VETH_MAC_ADDR, NULL); 5735 if (!mac_addr_p) { 5736 dev_err(&dev->dev, 5737 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5738 __FILE__, __LINE__); 5739 return 0; 5740 } 5741 5742 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5743 IBMVNIC_MAX_QUEUES); 5744 if (!netdev) 5745 return -ENOMEM; 5746 5747 adapter = netdev_priv(netdev); 5748 adapter->state = VNIC_PROBING; 5749 dev_set_drvdata(&dev->dev, netdev); 5750 adapter->vdev = dev; 5751 adapter->netdev = netdev; 5752 adapter->login_pending = false; 5753 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 5754 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 5755 bitmap_set(adapter->map_ids, 0, 1); 5756 5757 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5758 eth_hw_addr_set(netdev, adapter->mac_addr); 5759 netdev->irq = dev->irq; 5760 netdev->netdev_ops = &ibmvnic_netdev_ops; 5761 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5762 SET_NETDEV_DEV(netdev, &dev->dev); 5763 5764 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5765 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5766 __ibmvnic_delayed_reset); 5767 INIT_LIST_HEAD(&adapter->rwi_list); 5768 spin_lock_init(&adapter->rwi_lock); 5769 spin_lock_init(&adapter->state_lock); 5770 mutex_init(&adapter->fw_lock); 5771 init_completion(&adapter->init_done); 5772 init_completion(&adapter->fw_done); 5773 init_completion(&adapter->reset_done); 5774 init_completion(&adapter->stats_done); 5775 clear_bit(0, &adapter->resetting); 5776 adapter->prev_rx_buf_sz = 0; 5777 adapter->prev_mtu = 0; 5778 5779 init_success = false; 5780 do { 5781 rc = init_crq_queue(adapter); 5782 if (rc) { 5783 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5784 rc); 5785 goto ibmvnic_init_fail; 5786 } 5787 5788 rc = ibmvnic_reset_init(adapter, false); 5789 } while (rc == -EAGAIN); 5790 5791 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5792 * partner is not ready. CRQ is not active. When the partner becomes 5793 * ready, we will do the passive init reset. 5794 */ 5795 5796 if (!rc) 5797 init_success = true; 5798 5799 rc = init_stats_buffers(adapter); 5800 if (rc) 5801 goto ibmvnic_init_fail; 5802 5803 rc = init_stats_token(adapter); 5804 if (rc) 5805 goto ibmvnic_stats_fail; 5806 5807 rc = device_create_file(&dev->dev, &dev_attr_failover); 5808 if (rc) 5809 goto ibmvnic_dev_file_err; 5810 5811 netif_carrier_off(netdev); 5812 rc = register_netdev(netdev); 5813 if (rc) { 5814 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5815 goto ibmvnic_register_fail; 5816 } 5817 dev_info(&dev->dev, "ibmvnic registered\n"); 5818 5819 if (init_success) { 5820 adapter->state = VNIC_PROBED; 5821 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5822 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5823 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5824 } else { 5825 adapter->state = VNIC_DOWN; 5826 } 5827 5828 adapter->wait_for_reset = false; 5829 adapter->last_reset_time = jiffies; 5830 return 0; 5831 5832 ibmvnic_register_fail: 5833 device_remove_file(&dev->dev, &dev_attr_failover); 5834 5835 ibmvnic_dev_file_err: 5836 release_stats_token(adapter); 5837 5838 ibmvnic_stats_fail: 5839 release_stats_buffers(adapter); 5840 5841 ibmvnic_init_fail: 5842 release_sub_crqs(adapter, 1); 5843 release_crq_queue(adapter); 5844 mutex_destroy(&adapter->fw_lock); 5845 free_netdev(netdev); 5846 5847 return rc; 5848 } 5849 5850 static void ibmvnic_remove(struct vio_dev *dev) 5851 { 5852 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5853 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5854 unsigned long flags; 5855 5856 spin_lock_irqsave(&adapter->state_lock, flags); 5857 5858 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5859 * finish. Then, set the state to REMOVING to prevent it from 5860 * scheduling any more work and to have reset functions ignore 5861 * any resets that have already been scheduled. Drop the lock 5862 * after setting state, so __ibmvnic_reset() which is called 5863 * from the flush_work() below, can make progress. 5864 */ 5865 spin_lock(&adapter->rwi_lock); 5866 adapter->state = VNIC_REMOVING; 5867 spin_unlock(&adapter->rwi_lock); 5868 5869 spin_unlock_irqrestore(&adapter->state_lock, flags); 5870 5871 flush_work(&adapter->ibmvnic_reset); 5872 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5873 5874 rtnl_lock(); 5875 unregister_netdevice(netdev); 5876 5877 release_resources(adapter); 5878 release_rx_pools(adapter); 5879 release_tx_pools(adapter); 5880 release_sub_crqs(adapter, 1); 5881 release_crq_queue(adapter); 5882 5883 release_stats_token(adapter); 5884 release_stats_buffers(adapter); 5885 5886 adapter->state = VNIC_REMOVED; 5887 5888 rtnl_unlock(); 5889 mutex_destroy(&adapter->fw_lock); 5890 device_remove_file(&dev->dev, &dev_attr_failover); 5891 free_netdev(netdev); 5892 dev_set_drvdata(&dev->dev, NULL); 5893 } 5894 5895 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5896 const char *buf, size_t count) 5897 { 5898 struct net_device *netdev = dev_get_drvdata(dev); 5899 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5900 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5901 __be64 session_token; 5902 long rc; 5903 5904 if (!sysfs_streq(buf, "1")) 5905 return -EINVAL; 5906 5907 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5908 H_GET_SESSION_TOKEN, 0, 0, 0); 5909 if (rc) { 5910 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5911 rc); 5912 goto last_resort; 5913 } 5914 5915 session_token = (__be64)retbuf[0]; 5916 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5917 be64_to_cpu(session_token)); 5918 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5919 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5920 if (rc) 5921 netdev_err(netdev, 5922 "H_VIOCTL initiated failover failed, rc %ld\n", 5923 rc); 5924 5925 last_resort: 5926 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5927 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5928 5929 return count; 5930 } 5931 static DEVICE_ATTR_WO(failover); 5932 5933 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5934 { 5935 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5936 struct ibmvnic_adapter *adapter; 5937 struct iommu_table *tbl; 5938 unsigned long ret = 0; 5939 int i; 5940 5941 tbl = get_iommu_table_base(&vdev->dev); 5942 5943 /* netdev inits at probe time along with the structures we need below*/ 5944 if (!netdev) 5945 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5946 5947 adapter = netdev_priv(netdev); 5948 5949 ret += PAGE_SIZE; /* the crq message queue */ 5950 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5951 5952 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5953 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5954 5955 for (i = 0; i < adapter->num_active_rx_pools; i++) 5956 ret += adapter->rx_pool[i].size * 5957 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5958 5959 return ret; 5960 } 5961 5962 static int ibmvnic_resume(struct device *dev) 5963 { 5964 struct net_device *netdev = dev_get_drvdata(dev); 5965 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5966 5967 if (adapter->state != VNIC_OPEN) 5968 return 0; 5969 5970 tasklet_schedule(&adapter->tasklet); 5971 5972 return 0; 5973 } 5974 5975 static const struct vio_device_id ibmvnic_device_table[] = { 5976 {"network", "IBM,vnic"}, 5977 {"", "" } 5978 }; 5979 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5980 5981 static const struct dev_pm_ops ibmvnic_pm_ops = { 5982 .resume = ibmvnic_resume 5983 }; 5984 5985 static struct vio_driver ibmvnic_driver = { 5986 .id_table = ibmvnic_device_table, 5987 .probe = ibmvnic_probe, 5988 .remove = ibmvnic_remove, 5989 .get_desired_dma = ibmvnic_get_desired_dma, 5990 .name = ibmvnic_driver_name, 5991 .pm = &ibmvnic_pm_ops, 5992 }; 5993 5994 /* module functions */ 5995 static int __init ibmvnic_module_init(void) 5996 { 5997 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5998 IBMVNIC_DRIVER_VERSION); 5999 6000 return vio_register_driver(&ibmvnic_driver); 6001 } 6002 6003 static void __exit ibmvnic_module_exit(void) 6004 { 6005 vio_unregister_driver(&ibmvnic_driver); 6006 } 6007 6008 module_init(ibmvnic_module_init); 6009 module_exit(ibmvnic_module_exit); 6010