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/irqdomain.h> 57 #include <linux/kthread.h> 58 #include <linux/seq_file.h> 59 #include <linux/interrupt.h> 60 #include <net/net_namespace.h> 61 #include <asm/hvcall.h> 62 #include <linux/atomic.h> 63 #include <asm/vio.h> 64 #include <asm/xive.h> 65 #include <asm/iommu.h> 66 #include <linux/uaccess.h> 67 #include <asm/firmware.h> 68 #include <linux/workqueue.h> 69 #include <linux/if_vlan.h> 70 #include <linux/utsname.h> 71 72 #include "ibmvnic.h" 73 74 static const char ibmvnic_driver_name[] = "ibmvnic"; 75 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 76 77 MODULE_AUTHOR("Santiago Leon"); 78 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 79 MODULE_LICENSE("GPL"); 80 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 81 82 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 83 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 84 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 86 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 87 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 88 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 89 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 90 static int enable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int disable_scrq_irq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static int pending_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 97 struct ibmvnic_sub_crq_queue *); 98 static int ibmvnic_poll(struct napi_struct *napi, int data); 99 static void send_query_map(struct ibmvnic_adapter *adapter); 100 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 101 static int send_request_unmap(struct ibmvnic_adapter *, u8); 102 static int send_login(struct ibmvnic_adapter *adapter); 103 static void send_query_cap(struct ibmvnic_adapter *adapter); 104 static int init_sub_crqs(struct ibmvnic_adapter *); 105 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 106 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 107 static void release_crq_queue(struct ibmvnic_adapter *); 108 static int __ibmvnic_set_mac(struct net_device *, u8 *); 109 static int init_crq_queue(struct ibmvnic_adapter *adapter); 110 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 111 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 112 struct ibmvnic_sub_crq_queue *tx_scrq); 113 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 114 struct ibmvnic_long_term_buff *ltb); 115 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 116 117 struct ibmvnic_stat { 118 char name[ETH_GSTRING_LEN]; 119 int offset; 120 }; 121 122 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 123 offsetof(struct ibmvnic_statistics, stat)) 124 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 125 126 static const struct ibmvnic_stat ibmvnic_stats[] = { 127 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 128 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 129 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 130 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 131 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 132 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 133 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 134 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 135 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 136 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 137 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 138 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 139 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 140 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 141 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 142 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 143 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 144 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 145 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 146 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 147 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 148 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 149 }; 150 151 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 152 { 153 union ibmvnic_crq crq; 154 155 memset(&crq, 0, sizeof(crq)); 156 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 157 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 158 159 return ibmvnic_send_crq(adapter, &crq); 160 } 161 162 static int send_version_xchg(struct ibmvnic_adapter *adapter) 163 { 164 union ibmvnic_crq crq; 165 166 memset(&crq, 0, sizeof(crq)); 167 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 168 crq.version_exchange.cmd = VERSION_EXCHANGE; 169 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 170 171 return ibmvnic_send_crq(adapter, &crq); 172 } 173 174 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 175 unsigned long length, unsigned long *number, 176 unsigned long *irq) 177 { 178 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 179 long rc; 180 181 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 182 *number = retbuf[0]; 183 *irq = retbuf[1]; 184 185 return rc; 186 } 187 188 /** 189 * ibmvnic_wait_for_completion - Check device state and wait for completion 190 * @adapter: private device data 191 * @comp_done: completion structure to wait for 192 * @timeout: time to wait in milliseconds 193 * 194 * Wait for a completion signal or until the timeout limit is reached 195 * while checking that the device is still active. 196 */ 197 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 198 struct completion *comp_done, 199 unsigned long timeout) 200 { 201 struct net_device *netdev; 202 unsigned long div_timeout; 203 u8 retry; 204 205 netdev = adapter->netdev; 206 retry = 5; 207 div_timeout = msecs_to_jiffies(timeout / retry); 208 while (true) { 209 if (!adapter->crq.active) { 210 netdev_err(netdev, "Device down!\n"); 211 return -ENODEV; 212 } 213 if (!retry--) 214 break; 215 if (wait_for_completion_timeout(comp_done, div_timeout)) 216 return 0; 217 } 218 netdev_err(netdev, "Operation timed out.\n"); 219 return -ETIMEDOUT; 220 } 221 222 /** 223 * reuse_ltb() - Check if a long term buffer can be reused 224 * @ltb: The long term buffer to be checked 225 * @size: The size of the long term buffer. 226 * 227 * An LTB can be reused unless its size has changed. 228 * 229 * Return: Return true if the LTB can be reused, false otherwise. 230 */ 231 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 232 { 233 return (ltb->buff && ltb->size == size); 234 } 235 236 /** 237 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 238 * 239 * @adapter: ibmvnic adapter associated to the LTB 240 * @ltb: container object for the LTB 241 * @size: size of the LTB 242 * 243 * Allocate an LTB of the specified size and notify VIOS. 244 * 245 * If the given @ltb already has the correct size, reuse it. Otherwise if 246 * its non-NULL, free it. Then allocate a new one of the correct size. 247 * Notify the VIOS either way since we may now be working with a new VIOS. 248 * 249 * Allocating larger chunks of memory during resets, specially LPM or under 250 * low memory situations can cause resets to fail/timeout and for LPAR to 251 * lose connectivity. So hold onto the LTB even if we fail to communicate 252 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 253 * 254 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 255 * a negative value otherwise. 256 */ 257 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 258 struct ibmvnic_long_term_buff *ltb, int size) 259 { 260 struct device *dev = &adapter->vdev->dev; 261 u64 prev = 0; 262 int rc; 263 264 if (!reuse_ltb(ltb, size)) { 265 dev_dbg(dev, 266 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 267 ltb->size, size); 268 prev = ltb->size; 269 free_long_term_buff(adapter, ltb); 270 } 271 272 if (ltb->buff) { 273 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 274 ltb->map_id, ltb->size); 275 } else { 276 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 277 GFP_KERNEL); 278 if (!ltb->buff) { 279 dev_err(dev, "Couldn't alloc long term buffer\n"); 280 return -ENOMEM; 281 } 282 ltb->size = size; 283 284 ltb->map_id = find_first_zero_bit(adapter->map_ids, 285 MAX_MAP_ID); 286 bitmap_set(adapter->map_ids, ltb->map_id, 1); 287 288 dev_dbg(dev, 289 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", 290 ltb->map_id, ltb->size, prev); 291 } 292 293 /* Ensure ltb is zeroed - specially when reusing it. */ 294 memset(ltb->buff, 0, ltb->size); 295 296 mutex_lock(&adapter->fw_lock); 297 adapter->fw_done_rc = 0; 298 reinit_completion(&adapter->fw_done); 299 300 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 301 if (rc) { 302 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 303 goto out; 304 } 305 306 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 307 if (rc) { 308 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 309 rc); 310 goto out; 311 } 312 313 if (adapter->fw_done_rc) { 314 dev_err(dev, "Couldn't map LTB, rc = %d\n", 315 adapter->fw_done_rc); 316 rc = -EIO; 317 goto out; 318 } 319 rc = 0; 320 out: 321 /* don't free LTB on communication error - see function header */ 322 mutex_unlock(&adapter->fw_lock); 323 return rc; 324 } 325 326 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 327 struct ibmvnic_long_term_buff *ltb) 328 { 329 struct device *dev = &adapter->vdev->dev; 330 331 if (!ltb->buff) 332 return; 333 334 /* VIOS automatically unmaps the long term buffer at remote 335 * end for the following resets: 336 * FAILOVER, MOBILITY, TIMEOUT. 337 */ 338 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 339 adapter->reset_reason != VNIC_RESET_MOBILITY && 340 adapter->reset_reason != VNIC_RESET_TIMEOUT) 341 send_request_unmap(adapter, ltb->map_id); 342 343 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 344 345 ltb->buff = NULL; 346 /* mark this map_id free */ 347 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 348 ltb->map_id = 0; 349 } 350 351 /** 352 * free_ltb_set - free the given set of long term buffers (LTBS) 353 * @adapter: The ibmvnic adapter containing this ltb set 354 * @ltb_set: The ltb_set to be freed 355 * 356 * Free the set of LTBs in the given set. 357 */ 358 359 static void free_ltb_set(struct ibmvnic_adapter *adapter, 360 struct ibmvnic_ltb_set *ltb_set) 361 { 362 int i; 363 364 for (i = 0; i < ltb_set->num_ltbs; i++) 365 free_long_term_buff(adapter, <b_set->ltbs[i]); 366 367 kfree(ltb_set->ltbs); 368 ltb_set->ltbs = NULL; 369 ltb_set->num_ltbs = 0; 370 } 371 372 /** 373 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) 374 * 375 * @adapter: ibmvnic adapter associated to the LTB 376 * @ltb_set: container object for the set of LTBs 377 * @num_buffs: Number of buffers in the LTB 378 * @buff_size: Size of each buffer in the LTB 379 * 380 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size 381 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the 382 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. 383 * If new set needs more than in old set, allocate the remaining ones. 384 * Try and reuse as many LTBs as possible and avoid reallocation. 385 * 386 * Any changes to this allocation strategy must be reflected in 387 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). 388 */ 389 static int alloc_ltb_set(struct ibmvnic_adapter *adapter, 390 struct ibmvnic_ltb_set *ltb_set, int num_buffs, 391 int buff_size) 392 { 393 struct device *dev = &adapter->vdev->dev; 394 struct ibmvnic_ltb_set old_set; 395 struct ibmvnic_ltb_set new_set; 396 int rem_size; 397 int tot_size; /* size of all ltbs */ 398 int ltb_size; /* size of one ltb */ 399 int nltbs; 400 int rc; 401 int n; 402 int i; 403 404 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, 405 buff_size); 406 407 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); 408 tot_size = num_buffs * buff_size; 409 410 if (ltb_size > tot_size) 411 ltb_size = tot_size; 412 413 nltbs = tot_size / ltb_size; 414 if (tot_size % ltb_size) 415 nltbs++; 416 417 old_set = *ltb_set; 418 419 if (old_set.num_ltbs == nltbs) { 420 new_set = old_set; 421 } else { 422 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); 423 424 new_set.ltbs = kzalloc(tmp, GFP_KERNEL); 425 if (!new_set.ltbs) 426 return -ENOMEM; 427 428 new_set.num_ltbs = nltbs; 429 430 /* Free any excess ltbs in old set */ 431 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) 432 free_long_term_buff(adapter, &old_set.ltbs[i]); 433 434 /* Copy remaining ltbs to new set. All LTBs except the 435 * last one are of the same size. alloc_long_term_buff() 436 * will realloc if the size changes. 437 */ 438 n = min(old_set.num_ltbs, new_set.num_ltbs); 439 for (i = 0; i < n; i++) 440 new_set.ltbs[i] = old_set.ltbs[i]; 441 442 /* Any additional ltbs in new set will have NULL ltbs for 443 * now and will be allocated in alloc_long_term_buff(). 444 */ 445 446 /* We no longer need the old_set so free it. Note that we 447 * may have reused some ltbs from old set and freed excess 448 * ltbs above. So we only need to free the container now 449 * not the LTBs themselves. (i.e. dont free_ltb_set()!) 450 */ 451 kfree(old_set.ltbs); 452 old_set.ltbs = NULL; 453 old_set.num_ltbs = 0; 454 455 /* Install the new set. If allocations fail below, we will 456 * retry later and know what size LTBs we need. 457 */ 458 *ltb_set = new_set; 459 } 460 461 i = 0; 462 rem_size = tot_size; 463 while (rem_size) { 464 if (ltb_size > rem_size) 465 ltb_size = rem_size; 466 467 rem_size -= ltb_size; 468 469 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); 470 if (rc) 471 goto out; 472 i++; 473 } 474 475 WARN_ON(i != new_set.num_ltbs); 476 477 return 0; 478 out: 479 /* We may have allocated one/more LTBs before failing and we 480 * want to try and reuse on next reset. So don't free ltb set. 481 */ 482 return rc; 483 } 484 485 /** 486 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. 487 * @rxpool: The receive buffer pool containing buffer 488 * @bufidx: Index of buffer in rxpool 489 * @ltbp: (Output) pointer to the long term buffer containing the buffer 490 * @offset: (Output) offset of buffer in the LTB from @ltbp 491 * 492 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the 493 * pool and its corresponding offset. Assume for now that each LTB is of 494 * different size but could possibly be optimized based on the allocation 495 * strategy in alloc_ltb_set(). 496 */ 497 static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, 498 unsigned int bufidx, 499 struct ibmvnic_long_term_buff **ltbp, 500 unsigned int *offset) 501 { 502 struct ibmvnic_long_term_buff *ltb; 503 int nbufs; /* # of buffers in one ltb */ 504 int i; 505 506 WARN_ON(bufidx >= rxpool->size); 507 508 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { 509 ltb = &rxpool->ltb_set.ltbs[i]; 510 nbufs = ltb->size / rxpool->buff_size; 511 if (bufidx < nbufs) 512 break; 513 bufidx -= nbufs; 514 } 515 516 *ltbp = ltb; 517 *offset = bufidx * rxpool->buff_size; 518 } 519 520 /** 521 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. 522 * @txpool: The transmit buffer pool containing buffer 523 * @bufidx: Index of buffer in txpool 524 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer 525 * @offset: (Output) offset of buffer in the LTB from @ltbp 526 * 527 * Map the given buffer identified by [txpool, bufidx] to an LTB in the 528 * pool and its corresponding offset. 529 */ 530 static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, 531 unsigned int bufidx, 532 struct ibmvnic_long_term_buff **ltbp, 533 unsigned int *offset) 534 { 535 struct ibmvnic_long_term_buff *ltb; 536 int nbufs; /* # of buffers in one ltb */ 537 int i; 538 539 WARN_ON_ONCE(bufidx >= txpool->num_buffers); 540 541 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { 542 ltb = &txpool->ltb_set.ltbs[i]; 543 nbufs = ltb->size / txpool->buf_size; 544 if (bufidx < nbufs) 545 break; 546 bufidx -= nbufs; 547 } 548 549 *ltbp = ltb; 550 *offset = bufidx * txpool->buf_size; 551 } 552 553 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 554 { 555 int i; 556 557 for (i = 0; i < adapter->num_active_rx_pools; i++) 558 adapter->rx_pool[i].active = 0; 559 } 560 561 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 562 struct ibmvnic_rx_pool *pool) 563 { 564 int count = pool->size - atomic_read(&pool->available); 565 u64 handle = adapter->rx_scrq[pool->index]->handle; 566 struct device *dev = &adapter->vdev->dev; 567 struct ibmvnic_ind_xmit_queue *ind_bufp; 568 struct ibmvnic_sub_crq_queue *rx_scrq; 569 struct ibmvnic_long_term_buff *ltb; 570 union sub_crq *sub_crq; 571 int buffers_added = 0; 572 unsigned long lpar_rc; 573 struct sk_buff *skb; 574 unsigned int offset; 575 dma_addr_t dma_addr; 576 unsigned char *dst; 577 int shift = 0; 578 int bufidx; 579 int i; 580 581 if (!pool->active) 582 return; 583 584 rx_scrq = adapter->rx_scrq[pool->index]; 585 ind_bufp = &rx_scrq->ind_buf; 586 587 /* netdev_skb_alloc() could have failed after we saved a few skbs 588 * in the indir_buf and we would not have sent them to VIOS yet. 589 * To account for them, start the loop at ind_bufp->index rather 590 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 591 * be 0. 592 */ 593 for (i = ind_bufp->index; i < count; ++i) { 594 bufidx = pool->free_map[pool->next_free]; 595 596 /* We maybe reusing the skb from earlier resets. Allocate 597 * only if necessary. But since the LTB may have changed 598 * during reset (see init_rx_pools()), update LTB below 599 * even if reusing skb. 600 */ 601 skb = pool->rx_buff[bufidx].skb; 602 if (!skb) { 603 skb = netdev_alloc_skb(adapter->netdev, 604 pool->buff_size); 605 if (!skb) { 606 dev_err(dev, "Couldn't replenish rx buff\n"); 607 adapter->replenish_no_mem++; 608 break; 609 } 610 } 611 612 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 613 pool->next_free = (pool->next_free + 1) % pool->size; 614 615 /* Copy the skb to the long term mapped DMA buffer */ 616 map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); 617 dst = ltb->buff + offset; 618 memset(dst, 0, pool->buff_size); 619 dma_addr = ltb->addr + offset; 620 621 /* add the skb to an rx_buff in the pool */ 622 pool->rx_buff[bufidx].data = dst; 623 pool->rx_buff[bufidx].dma = dma_addr; 624 pool->rx_buff[bufidx].skb = skb; 625 pool->rx_buff[bufidx].pool_index = pool->index; 626 pool->rx_buff[bufidx].size = pool->buff_size; 627 628 /* queue the rx_buff for the next send_subcrq_indirect */ 629 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 630 memset(sub_crq, 0, sizeof(*sub_crq)); 631 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 632 sub_crq->rx_add.correlator = 633 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 634 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 635 sub_crq->rx_add.map_id = ltb->map_id; 636 637 /* The length field of the sCRQ is defined to be 24 bits so the 638 * buffer size needs to be left shifted by a byte before it is 639 * converted to big endian to prevent the last byte from being 640 * truncated. 641 */ 642 #ifdef __LITTLE_ENDIAN__ 643 shift = 8; 644 #endif 645 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 646 647 /* if send_subcrq_indirect queue is full, flush to VIOS */ 648 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 649 i == count - 1) { 650 lpar_rc = 651 send_subcrq_indirect(adapter, handle, 652 (u64)ind_bufp->indir_dma, 653 (u64)ind_bufp->index); 654 if (lpar_rc != H_SUCCESS) 655 goto failure; 656 buffers_added += ind_bufp->index; 657 adapter->replenish_add_buff_success += ind_bufp->index; 658 ind_bufp->index = 0; 659 } 660 } 661 atomic_add(buffers_added, &pool->available); 662 return; 663 664 failure: 665 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 666 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 667 for (i = ind_bufp->index - 1; i >= 0; --i) { 668 struct ibmvnic_rx_buff *rx_buff; 669 670 pool->next_free = pool->next_free == 0 ? 671 pool->size - 1 : pool->next_free - 1; 672 sub_crq = &ind_bufp->indir_arr[i]; 673 rx_buff = (struct ibmvnic_rx_buff *) 674 be64_to_cpu(sub_crq->rx_add.correlator); 675 bufidx = (int)(rx_buff - pool->rx_buff); 676 pool->free_map[pool->next_free] = bufidx; 677 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 678 pool->rx_buff[bufidx].skb = NULL; 679 } 680 adapter->replenish_add_buff_failure += ind_bufp->index; 681 atomic_add(buffers_added, &pool->available); 682 ind_bufp->index = 0; 683 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 684 /* Disable buffer pool replenishment and report carrier off if 685 * queue is closed or pending failover. 686 * Firmware guarantees that a signal will be sent to the 687 * driver, triggering a reset. 688 */ 689 deactivate_rx_pools(adapter); 690 netif_carrier_off(adapter->netdev); 691 } 692 } 693 694 static void replenish_pools(struct ibmvnic_adapter *adapter) 695 { 696 int i; 697 698 adapter->replenish_task_cycles++; 699 for (i = 0; i < adapter->num_active_rx_pools; i++) { 700 if (adapter->rx_pool[i].active) 701 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 702 } 703 704 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 705 } 706 707 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 708 { 709 kfree(adapter->tx_stats_buffers); 710 kfree(adapter->rx_stats_buffers); 711 adapter->tx_stats_buffers = NULL; 712 adapter->rx_stats_buffers = NULL; 713 } 714 715 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 716 { 717 adapter->tx_stats_buffers = 718 kcalloc(IBMVNIC_MAX_QUEUES, 719 sizeof(struct ibmvnic_tx_queue_stats), 720 GFP_KERNEL); 721 if (!adapter->tx_stats_buffers) 722 return -ENOMEM; 723 724 adapter->rx_stats_buffers = 725 kcalloc(IBMVNIC_MAX_QUEUES, 726 sizeof(struct ibmvnic_rx_queue_stats), 727 GFP_KERNEL); 728 if (!adapter->rx_stats_buffers) 729 return -ENOMEM; 730 731 return 0; 732 } 733 734 static void release_stats_token(struct ibmvnic_adapter *adapter) 735 { 736 struct device *dev = &adapter->vdev->dev; 737 738 if (!adapter->stats_token) 739 return; 740 741 dma_unmap_single(dev, adapter->stats_token, 742 sizeof(struct ibmvnic_statistics), 743 DMA_FROM_DEVICE); 744 adapter->stats_token = 0; 745 } 746 747 static int init_stats_token(struct ibmvnic_adapter *adapter) 748 { 749 struct device *dev = &adapter->vdev->dev; 750 dma_addr_t stok; 751 int rc; 752 753 stok = dma_map_single(dev, &adapter->stats, 754 sizeof(struct ibmvnic_statistics), 755 DMA_FROM_DEVICE); 756 rc = dma_mapping_error(dev, stok); 757 if (rc) { 758 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 759 return rc; 760 } 761 762 adapter->stats_token = stok; 763 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 764 return 0; 765 } 766 767 /** 768 * release_rx_pools() - Release any rx pools attached to @adapter. 769 * @adapter: ibmvnic adapter 770 * 771 * Safe to call this multiple times - even if no pools are attached. 772 */ 773 static void release_rx_pools(struct ibmvnic_adapter *adapter) 774 { 775 struct ibmvnic_rx_pool *rx_pool; 776 int i, j; 777 778 if (!adapter->rx_pool) 779 return; 780 781 for (i = 0; i < adapter->num_active_rx_pools; i++) { 782 rx_pool = &adapter->rx_pool[i]; 783 784 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 785 786 kfree(rx_pool->free_map); 787 788 free_ltb_set(adapter, &rx_pool->ltb_set); 789 790 if (!rx_pool->rx_buff) 791 continue; 792 793 for (j = 0; j < rx_pool->size; j++) { 794 if (rx_pool->rx_buff[j].skb) { 795 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 796 rx_pool->rx_buff[j].skb = NULL; 797 } 798 } 799 800 kfree(rx_pool->rx_buff); 801 } 802 803 kfree(adapter->rx_pool); 804 adapter->rx_pool = NULL; 805 adapter->num_active_rx_pools = 0; 806 adapter->prev_rx_pool_size = 0; 807 } 808 809 /** 810 * reuse_rx_pools() - Check if the existing rx pools can be reused. 811 * @adapter: ibmvnic adapter 812 * 813 * Check if the existing rx pools in the adapter can be reused. The 814 * pools can be reused if the pool parameters (number of pools, 815 * number of buffers in the pool and size of each buffer) have not 816 * changed. 817 * 818 * NOTE: This assumes that all pools have the same number of buffers 819 * which is the case currently. If that changes, we must fix this. 820 * 821 * Return: true if the rx pools can be reused, false otherwise. 822 */ 823 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 824 { 825 u64 old_num_pools, new_num_pools; 826 u64 old_pool_size, new_pool_size; 827 u64 old_buff_size, new_buff_size; 828 829 if (!adapter->rx_pool) 830 return false; 831 832 old_num_pools = adapter->num_active_rx_pools; 833 new_num_pools = adapter->req_rx_queues; 834 835 old_pool_size = adapter->prev_rx_pool_size; 836 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 837 838 old_buff_size = adapter->prev_rx_buf_sz; 839 new_buff_size = adapter->cur_rx_buf_sz; 840 841 if (old_buff_size != new_buff_size || 842 old_num_pools != new_num_pools || 843 old_pool_size != new_pool_size) 844 return false; 845 846 return true; 847 } 848 849 /** 850 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 851 * @netdev: net device associated with the vnic interface 852 * 853 * Initialize the set of receiver pools in the ibmvnic adapter associated 854 * with the net_device @netdev. If possible, reuse the existing rx pools. 855 * Otherwise free any existing pools and allocate a new set of pools 856 * before initializing them. 857 * 858 * Return: 0 on success and negative value on error. 859 */ 860 static int init_rx_pools(struct net_device *netdev) 861 { 862 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 863 struct device *dev = &adapter->vdev->dev; 864 struct ibmvnic_rx_pool *rx_pool; 865 u64 num_pools; 866 u64 pool_size; /* # of buffers in one pool */ 867 u64 buff_size; 868 int i, j, rc; 869 870 pool_size = adapter->req_rx_add_entries_per_subcrq; 871 num_pools = adapter->req_rx_queues; 872 buff_size = adapter->cur_rx_buf_sz; 873 874 if (reuse_rx_pools(adapter)) { 875 dev_dbg(dev, "Reusing rx pools\n"); 876 goto update_ltb; 877 } 878 879 /* Allocate/populate the pools. */ 880 release_rx_pools(adapter); 881 882 adapter->rx_pool = kcalloc(num_pools, 883 sizeof(struct ibmvnic_rx_pool), 884 GFP_KERNEL); 885 if (!adapter->rx_pool) { 886 dev_err(dev, "Failed to allocate rx pools\n"); 887 return -ENOMEM; 888 } 889 890 /* Set num_active_rx_pools early. If we fail below after partial 891 * allocation, release_rx_pools() will know how many to look for. 892 */ 893 adapter->num_active_rx_pools = num_pools; 894 895 for (i = 0; i < num_pools; i++) { 896 rx_pool = &adapter->rx_pool[i]; 897 898 netdev_dbg(adapter->netdev, 899 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 900 i, pool_size, buff_size); 901 902 rx_pool->size = pool_size; 903 rx_pool->index = i; 904 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 905 906 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 907 GFP_KERNEL); 908 if (!rx_pool->free_map) { 909 dev_err(dev, "Couldn't alloc free_map %d\n", i); 910 rc = -ENOMEM; 911 goto out_release; 912 } 913 914 rx_pool->rx_buff = kcalloc(rx_pool->size, 915 sizeof(struct ibmvnic_rx_buff), 916 GFP_KERNEL); 917 if (!rx_pool->rx_buff) { 918 dev_err(dev, "Couldn't alloc rx buffers\n"); 919 rc = -ENOMEM; 920 goto out_release; 921 } 922 } 923 924 adapter->prev_rx_pool_size = pool_size; 925 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 926 927 update_ltb: 928 for (i = 0; i < num_pools; i++) { 929 rx_pool = &adapter->rx_pool[i]; 930 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 931 i, rx_pool->size, rx_pool->buff_size); 932 933 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, 934 rx_pool->size, rx_pool->buff_size); 935 if (rc) 936 goto out; 937 938 for (j = 0; j < rx_pool->size; ++j) { 939 struct ibmvnic_rx_buff *rx_buff; 940 941 rx_pool->free_map[j] = j; 942 943 /* NOTE: Don't clear rx_buff->skb here - will leak 944 * memory! replenish_rx_pool() will reuse skbs or 945 * allocate as necessary. 946 */ 947 rx_buff = &rx_pool->rx_buff[j]; 948 rx_buff->dma = 0; 949 rx_buff->data = 0; 950 rx_buff->size = 0; 951 rx_buff->pool_index = 0; 952 } 953 954 /* Mark pool "empty" so replenish_rx_pools() will 955 * update the LTB info for each buffer 956 */ 957 atomic_set(&rx_pool->available, 0); 958 rx_pool->next_alloc = 0; 959 rx_pool->next_free = 0; 960 /* replenish_rx_pool() may have called deactivate_rx_pools() 961 * on failover. Ensure pool is active now. 962 */ 963 rx_pool->active = 1; 964 } 965 return 0; 966 out_release: 967 release_rx_pools(adapter); 968 out: 969 /* We failed to allocate one or more LTBs or map them on the VIOS. 970 * Hold onto the pools and any LTBs that we did allocate/map. 971 */ 972 return rc; 973 } 974 975 static void release_vpd_data(struct ibmvnic_adapter *adapter) 976 { 977 if (!adapter->vpd) 978 return; 979 980 kfree(adapter->vpd->buff); 981 kfree(adapter->vpd); 982 983 adapter->vpd = NULL; 984 } 985 986 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 987 struct ibmvnic_tx_pool *tx_pool) 988 { 989 kfree(tx_pool->tx_buff); 990 kfree(tx_pool->free_map); 991 free_ltb_set(adapter, &tx_pool->ltb_set); 992 } 993 994 /** 995 * release_tx_pools() - Release any tx pools attached to @adapter. 996 * @adapter: ibmvnic adapter 997 * 998 * Safe to call this multiple times - even if no pools are attached. 999 */ 1000 static void release_tx_pools(struct ibmvnic_adapter *adapter) 1001 { 1002 int i; 1003 1004 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 1005 * both NULL or both non-NULL. So we only need to check one. 1006 */ 1007 if (!adapter->tx_pool) 1008 return; 1009 1010 for (i = 0; i < adapter->num_active_tx_pools; i++) { 1011 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 1012 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 1013 } 1014 1015 kfree(adapter->tx_pool); 1016 adapter->tx_pool = NULL; 1017 kfree(adapter->tso_pool); 1018 adapter->tso_pool = NULL; 1019 adapter->num_active_tx_pools = 0; 1020 adapter->prev_tx_pool_size = 0; 1021 } 1022 1023 static int init_one_tx_pool(struct net_device *netdev, 1024 struct ibmvnic_tx_pool *tx_pool, 1025 int pool_size, int buf_size) 1026 { 1027 int i; 1028 1029 tx_pool->tx_buff = kcalloc(pool_size, 1030 sizeof(struct ibmvnic_tx_buff), 1031 GFP_KERNEL); 1032 if (!tx_pool->tx_buff) 1033 return -ENOMEM; 1034 1035 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 1036 if (!tx_pool->free_map) { 1037 kfree(tx_pool->tx_buff); 1038 tx_pool->tx_buff = NULL; 1039 return -ENOMEM; 1040 } 1041 1042 for (i = 0; i < pool_size; i++) 1043 tx_pool->free_map[i] = i; 1044 1045 tx_pool->consumer_index = 0; 1046 tx_pool->producer_index = 0; 1047 tx_pool->num_buffers = pool_size; 1048 tx_pool->buf_size = buf_size; 1049 1050 return 0; 1051 } 1052 1053 /** 1054 * reuse_tx_pools() - Check if the existing tx pools can be reused. 1055 * @adapter: ibmvnic adapter 1056 * 1057 * Check if the existing tx pools in the adapter can be reused. The 1058 * pools can be reused if the pool parameters (number of pools, 1059 * number of buffers in the pool and mtu) have not changed. 1060 * 1061 * NOTE: This assumes that all pools have the same number of buffers 1062 * which is the case currently. If that changes, we must fix this. 1063 * 1064 * Return: true if the tx pools can be reused, false otherwise. 1065 */ 1066 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 1067 { 1068 u64 old_num_pools, new_num_pools; 1069 u64 old_pool_size, new_pool_size; 1070 u64 old_mtu, new_mtu; 1071 1072 if (!adapter->tx_pool) 1073 return false; 1074 1075 old_num_pools = adapter->num_active_tx_pools; 1076 new_num_pools = adapter->num_active_tx_scrqs; 1077 old_pool_size = adapter->prev_tx_pool_size; 1078 new_pool_size = adapter->req_tx_entries_per_subcrq; 1079 old_mtu = adapter->prev_mtu; 1080 new_mtu = adapter->req_mtu; 1081 1082 if (old_mtu != new_mtu || 1083 old_num_pools != new_num_pools || 1084 old_pool_size != new_pool_size) 1085 return false; 1086 1087 return true; 1088 } 1089 1090 /** 1091 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 1092 * @netdev: net device associated with the vnic interface 1093 * 1094 * Initialize the set of transmit pools in the ibmvnic adapter associated 1095 * with the net_device @netdev. If possible, reuse the existing tx pools. 1096 * Otherwise free any existing pools and allocate a new set of pools 1097 * before initializing them. 1098 * 1099 * Return: 0 on success and negative value on error. 1100 */ 1101 static int init_tx_pools(struct net_device *netdev) 1102 { 1103 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1104 struct device *dev = &adapter->vdev->dev; 1105 int num_pools; 1106 u64 pool_size; /* # of buffers in pool */ 1107 u64 buff_size; 1108 int i, j, rc; 1109 1110 num_pools = adapter->req_tx_queues; 1111 1112 /* We must notify the VIOS about the LTB on all resets - but we only 1113 * need to alloc/populate pools if either the number of buffers or 1114 * size of each buffer in the pool has changed. 1115 */ 1116 if (reuse_tx_pools(adapter)) { 1117 netdev_dbg(netdev, "Reusing tx pools\n"); 1118 goto update_ltb; 1119 } 1120 1121 /* Allocate/populate the pools. */ 1122 release_tx_pools(adapter); 1123 1124 pool_size = adapter->req_tx_entries_per_subcrq; 1125 num_pools = adapter->num_active_tx_scrqs; 1126 1127 adapter->tx_pool = kcalloc(num_pools, 1128 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1129 if (!adapter->tx_pool) 1130 return -ENOMEM; 1131 1132 adapter->tso_pool = kcalloc(num_pools, 1133 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1134 /* To simplify release_tx_pools() ensure that ->tx_pool and 1135 * ->tso_pool are either both NULL or both non-NULL. 1136 */ 1137 if (!adapter->tso_pool) { 1138 kfree(adapter->tx_pool); 1139 adapter->tx_pool = NULL; 1140 return -ENOMEM; 1141 } 1142 1143 /* Set num_active_tx_pools early. If we fail below after partial 1144 * allocation, release_tx_pools() will know how many to look for. 1145 */ 1146 adapter->num_active_tx_pools = num_pools; 1147 1148 buff_size = adapter->req_mtu + VLAN_HLEN; 1149 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1150 1151 for (i = 0; i < num_pools; i++) { 1152 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 1153 i, adapter->req_tx_entries_per_subcrq, buff_size); 1154 1155 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 1156 pool_size, buff_size); 1157 if (rc) 1158 goto out_release; 1159 1160 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 1161 IBMVNIC_TSO_BUFS, 1162 IBMVNIC_TSO_BUF_SZ); 1163 if (rc) 1164 goto out_release; 1165 } 1166 1167 adapter->prev_tx_pool_size = pool_size; 1168 adapter->prev_mtu = adapter->req_mtu; 1169 1170 update_ltb: 1171 /* NOTE: All tx_pools have the same number of buffers (which is 1172 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 1173 * buffers (see calls init_one_tx_pool() for these). 1174 * For consistency, we use tx_pool->num_buffers and 1175 * tso_pool->num_buffers below. 1176 */ 1177 rc = -1; 1178 for (i = 0; i < num_pools; i++) { 1179 struct ibmvnic_tx_pool *tso_pool; 1180 struct ibmvnic_tx_pool *tx_pool; 1181 1182 tx_pool = &adapter->tx_pool[i]; 1183 1184 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", 1185 i, tx_pool->num_buffers, tx_pool->buf_size); 1186 1187 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, 1188 tx_pool->num_buffers, tx_pool->buf_size); 1189 if (rc) 1190 goto out; 1191 1192 tx_pool->consumer_index = 0; 1193 tx_pool->producer_index = 0; 1194 1195 for (j = 0; j < tx_pool->num_buffers; j++) 1196 tx_pool->free_map[j] = j; 1197 1198 tso_pool = &adapter->tso_pool[i]; 1199 1200 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", 1201 i, tso_pool->num_buffers, tso_pool->buf_size); 1202 1203 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, 1204 tso_pool->num_buffers, tso_pool->buf_size); 1205 if (rc) 1206 goto out; 1207 1208 tso_pool->consumer_index = 0; 1209 tso_pool->producer_index = 0; 1210 1211 for (j = 0; j < tso_pool->num_buffers; j++) 1212 tso_pool->free_map[j] = j; 1213 } 1214 1215 return 0; 1216 out_release: 1217 release_tx_pools(adapter); 1218 out: 1219 /* We failed to allocate one or more LTBs or map them on the VIOS. 1220 * Hold onto the pools and any LTBs that we did allocate/map. 1221 */ 1222 return rc; 1223 } 1224 1225 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1226 { 1227 int i; 1228 1229 if (adapter->napi_enabled) 1230 return; 1231 1232 for (i = 0; i < adapter->req_rx_queues; i++) 1233 napi_enable(&adapter->napi[i]); 1234 1235 adapter->napi_enabled = true; 1236 } 1237 1238 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1239 { 1240 int i; 1241 1242 if (!adapter->napi_enabled) 1243 return; 1244 1245 for (i = 0; i < adapter->req_rx_queues; i++) { 1246 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1247 napi_disable(&adapter->napi[i]); 1248 } 1249 1250 adapter->napi_enabled = false; 1251 } 1252 1253 static int init_napi(struct ibmvnic_adapter *adapter) 1254 { 1255 int i; 1256 1257 adapter->napi = kcalloc(adapter->req_rx_queues, 1258 sizeof(struct napi_struct), GFP_KERNEL); 1259 if (!adapter->napi) 1260 return -ENOMEM; 1261 1262 for (i = 0; i < adapter->req_rx_queues; i++) { 1263 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1264 netif_napi_add(adapter->netdev, &adapter->napi[i], 1265 ibmvnic_poll, NAPI_POLL_WEIGHT); 1266 } 1267 1268 adapter->num_active_rx_napi = adapter->req_rx_queues; 1269 return 0; 1270 } 1271 1272 static void release_napi(struct ibmvnic_adapter *adapter) 1273 { 1274 int i; 1275 1276 if (!adapter->napi) 1277 return; 1278 1279 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1280 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1281 netif_napi_del(&adapter->napi[i]); 1282 } 1283 1284 kfree(adapter->napi); 1285 adapter->napi = NULL; 1286 adapter->num_active_rx_napi = 0; 1287 adapter->napi_enabled = false; 1288 } 1289 1290 static const char *adapter_state_to_string(enum vnic_state state) 1291 { 1292 switch (state) { 1293 case VNIC_PROBING: 1294 return "PROBING"; 1295 case VNIC_PROBED: 1296 return "PROBED"; 1297 case VNIC_OPENING: 1298 return "OPENING"; 1299 case VNIC_OPEN: 1300 return "OPEN"; 1301 case VNIC_CLOSING: 1302 return "CLOSING"; 1303 case VNIC_CLOSED: 1304 return "CLOSED"; 1305 case VNIC_REMOVING: 1306 return "REMOVING"; 1307 case VNIC_REMOVED: 1308 return "REMOVED"; 1309 case VNIC_DOWN: 1310 return "DOWN"; 1311 } 1312 return "UNKNOWN"; 1313 } 1314 1315 static int ibmvnic_login(struct net_device *netdev) 1316 { 1317 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1318 unsigned long timeout = msecs_to_jiffies(20000); 1319 int retry_count = 0; 1320 int retries = 10; 1321 bool retry; 1322 int rc; 1323 1324 do { 1325 retry = false; 1326 if (retry_count > retries) { 1327 netdev_warn(netdev, "Login attempts exceeded\n"); 1328 return -EACCES; 1329 } 1330 1331 adapter->init_done_rc = 0; 1332 reinit_completion(&adapter->init_done); 1333 rc = send_login(adapter); 1334 if (rc) 1335 return rc; 1336 1337 if (!wait_for_completion_timeout(&adapter->init_done, 1338 timeout)) { 1339 netdev_warn(netdev, "Login timed out, retrying...\n"); 1340 retry = true; 1341 adapter->init_done_rc = 0; 1342 retry_count++; 1343 continue; 1344 } 1345 1346 if (adapter->init_done_rc == ABORTED) { 1347 netdev_warn(netdev, "Login aborted, retrying...\n"); 1348 retry = true; 1349 adapter->init_done_rc = 0; 1350 retry_count++; 1351 /* FW or device may be busy, so 1352 * wait a bit before retrying login 1353 */ 1354 msleep(500); 1355 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1356 retry_count++; 1357 release_sub_crqs(adapter, 1); 1358 1359 retry = true; 1360 netdev_dbg(netdev, 1361 "Received partial success, retrying...\n"); 1362 adapter->init_done_rc = 0; 1363 reinit_completion(&adapter->init_done); 1364 send_query_cap(adapter); 1365 if (!wait_for_completion_timeout(&adapter->init_done, 1366 timeout)) { 1367 netdev_warn(netdev, 1368 "Capabilities query timed out\n"); 1369 return -ETIMEDOUT; 1370 } 1371 1372 rc = init_sub_crqs(adapter); 1373 if (rc) { 1374 netdev_warn(netdev, 1375 "SCRQ initialization failed\n"); 1376 return rc; 1377 } 1378 1379 rc = init_sub_crq_irqs(adapter); 1380 if (rc) { 1381 netdev_warn(netdev, 1382 "SCRQ irq initialization failed\n"); 1383 return rc; 1384 } 1385 } else if (adapter->init_done_rc) { 1386 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1387 adapter->init_done_rc); 1388 return -EIO; 1389 } 1390 } while (retry); 1391 1392 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1393 1394 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1395 return 0; 1396 } 1397 1398 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1399 { 1400 kfree(adapter->login_buf); 1401 adapter->login_buf = NULL; 1402 } 1403 1404 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1405 { 1406 kfree(adapter->login_rsp_buf); 1407 adapter->login_rsp_buf = NULL; 1408 } 1409 1410 static void release_resources(struct ibmvnic_adapter *adapter) 1411 { 1412 release_vpd_data(adapter); 1413 1414 release_napi(adapter); 1415 release_login_buffer(adapter); 1416 release_login_rsp_buffer(adapter); 1417 } 1418 1419 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1420 { 1421 struct net_device *netdev = adapter->netdev; 1422 unsigned long timeout = msecs_to_jiffies(20000); 1423 union ibmvnic_crq crq; 1424 bool resend; 1425 int rc; 1426 1427 netdev_dbg(netdev, "setting link state %d\n", link_state); 1428 1429 memset(&crq, 0, sizeof(crq)); 1430 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1431 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1432 crq.logical_link_state.link_state = link_state; 1433 1434 do { 1435 resend = false; 1436 1437 reinit_completion(&adapter->init_done); 1438 rc = ibmvnic_send_crq(adapter, &crq); 1439 if (rc) { 1440 netdev_err(netdev, "Failed to set link state\n"); 1441 return rc; 1442 } 1443 1444 if (!wait_for_completion_timeout(&adapter->init_done, 1445 timeout)) { 1446 netdev_err(netdev, "timeout setting link state\n"); 1447 return -ETIMEDOUT; 1448 } 1449 1450 if (adapter->init_done_rc == PARTIALSUCCESS) { 1451 /* Partuial success, delay and re-send */ 1452 mdelay(1000); 1453 resend = true; 1454 } else if (adapter->init_done_rc) { 1455 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1456 adapter->init_done_rc); 1457 return adapter->init_done_rc; 1458 } 1459 } while (resend); 1460 1461 return 0; 1462 } 1463 1464 static int set_real_num_queues(struct net_device *netdev) 1465 { 1466 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1467 int rc; 1468 1469 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1470 adapter->req_tx_queues, adapter->req_rx_queues); 1471 1472 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1473 if (rc) { 1474 netdev_err(netdev, "failed to set the number of tx queues\n"); 1475 return rc; 1476 } 1477 1478 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1479 if (rc) 1480 netdev_err(netdev, "failed to set the number of rx queues\n"); 1481 1482 return rc; 1483 } 1484 1485 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1486 { 1487 struct device *dev = &adapter->vdev->dev; 1488 union ibmvnic_crq crq; 1489 int len = 0; 1490 int rc; 1491 1492 if (adapter->vpd->buff) 1493 len = adapter->vpd->len; 1494 1495 mutex_lock(&adapter->fw_lock); 1496 adapter->fw_done_rc = 0; 1497 reinit_completion(&adapter->fw_done); 1498 1499 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1500 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1501 rc = ibmvnic_send_crq(adapter, &crq); 1502 if (rc) { 1503 mutex_unlock(&adapter->fw_lock); 1504 return rc; 1505 } 1506 1507 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1508 if (rc) { 1509 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1510 mutex_unlock(&adapter->fw_lock); 1511 return rc; 1512 } 1513 mutex_unlock(&adapter->fw_lock); 1514 1515 if (!adapter->vpd->len) 1516 return -ENODATA; 1517 1518 if (!adapter->vpd->buff) 1519 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1520 else if (adapter->vpd->len != len) 1521 adapter->vpd->buff = 1522 krealloc(adapter->vpd->buff, 1523 adapter->vpd->len, GFP_KERNEL); 1524 1525 if (!adapter->vpd->buff) { 1526 dev_err(dev, "Could allocate VPD buffer\n"); 1527 return -ENOMEM; 1528 } 1529 1530 adapter->vpd->dma_addr = 1531 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1532 DMA_FROM_DEVICE); 1533 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1534 dev_err(dev, "Could not map VPD buffer\n"); 1535 kfree(adapter->vpd->buff); 1536 adapter->vpd->buff = NULL; 1537 return -ENOMEM; 1538 } 1539 1540 mutex_lock(&adapter->fw_lock); 1541 adapter->fw_done_rc = 0; 1542 reinit_completion(&adapter->fw_done); 1543 1544 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1545 crq.get_vpd.cmd = GET_VPD; 1546 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1547 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1548 rc = ibmvnic_send_crq(adapter, &crq); 1549 if (rc) { 1550 kfree(adapter->vpd->buff); 1551 adapter->vpd->buff = NULL; 1552 mutex_unlock(&adapter->fw_lock); 1553 return rc; 1554 } 1555 1556 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1557 if (rc) { 1558 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1559 kfree(adapter->vpd->buff); 1560 adapter->vpd->buff = NULL; 1561 mutex_unlock(&adapter->fw_lock); 1562 return rc; 1563 } 1564 1565 mutex_unlock(&adapter->fw_lock); 1566 return 0; 1567 } 1568 1569 static int init_resources(struct ibmvnic_adapter *adapter) 1570 { 1571 struct net_device *netdev = adapter->netdev; 1572 int rc; 1573 1574 rc = set_real_num_queues(netdev); 1575 if (rc) 1576 return rc; 1577 1578 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1579 if (!adapter->vpd) 1580 return -ENOMEM; 1581 1582 /* Vital Product Data (VPD) */ 1583 rc = ibmvnic_get_vpd(adapter); 1584 if (rc) { 1585 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1586 return rc; 1587 } 1588 1589 rc = init_napi(adapter); 1590 if (rc) 1591 return rc; 1592 1593 send_query_map(adapter); 1594 1595 rc = init_rx_pools(netdev); 1596 if (rc) 1597 return rc; 1598 1599 rc = init_tx_pools(netdev); 1600 return rc; 1601 } 1602 1603 static int __ibmvnic_open(struct net_device *netdev) 1604 { 1605 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1606 enum vnic_state prev_state = adapter->state; 1607 int i, rc; 1608 1609 adapter->state = VNIC_OPENING; 1610 replenish_pools(adapter); 1611 ibmvnic_napi_enable(adapter); 1612 1613 /* We're ready to receive frames, enable the sub-crq interrupts and 1614 * set the logical link state to up 1615 */ 1616 for (i = 0; i < adapter->req_rx_queues; i++) { 1617 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1618 if (prev_state == VNIC_CLOSED) 1619 enable_irq(adapter->rx_scrq[i]->irq); 1620 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1621 } 1622 1623 for (i = 0; i < adapter->req_tx_queues; i++) { 1624 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1625 if (prev_state == VNIC_CLOSED) 1626 enable_irq(adapter->tx_scrq[i]->irq); 1627 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1628 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1629 } 1630 1631 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1632 if (rc) { 1633 ibmvnic_napi_disable(adapter); 1634 ibmvnic_disable_irqs(adapter); 1635 return rc; 1636 } 1637 1638 adapter->tx_queues_active = true; 1639 1640 /* Since queues were stopped until now, there shouldn't be any 1641 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1642 * don't need the synchronize_rcu()? Leaving it for consistency 1643 * with setting ->tx_queues_active = false. 1644 */ 1645 synchronize_rcu(); 1646 1647 netif_tx_start_all_queues(netdev); 1648 1649 if (prev_state == VNIC_CLOSED) { 1650 for (i = 0; i < adapter->req_rx_queues; i++) 1651 napi_schedule(&adapter->napi[i]); 1652 } 1653 1654 adapter->state = VNIC_OPEN; 1655 return rc; 1656 } 1657 1658 static int ibmvnic_open(struct net_device *netdev) 1659 { 1660 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1661 int rc; 1662 1663 ASSERT_RTNL(); 1664 1665 /* If device failover is pending or we are about to reset, just set 1666 * device state and return. Device operation will be handled by reset 1667 * routine. 1668 * 1669 * It should be safe to overwrite the adapter->state here. Since 1670 * we hold the rtnl, either the reset has not actually started or 1671 * the rtnl got dropped during the set_link_state() in do_reset(). 1672 * In the former case, no one else is changing the state (again we 1673 * have the rtnl) and in the latter case, do_reset() will detect and 1674 * honor our setting below. 1675 */ 1676 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1677 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1678 adapter_state_to_string(adapter->state), 1679 adapter->failover_pending); 1680 adapter->state = VNIC_OPEN; 1681 rc = 0; 1682 goto out; 1683 } 1684 1685 if (adapter->state != VNIC_CLOSED) { 1686 rc = ibmvnic_login(netdev); 1687 if (rc) 1688 goto out; 1689 1690 rc = init_resources(adapter); 1691 if (rc) { 1692 netdev_err(netdev, "failed to initialize resources\n"); 1693 goto out; 1694 } 1695 } 1696 1697 rc = __ibmvnic_open(netdev); 1698 1699 out: 1700 /* If open failed and there is a pending failover or in-progress reset, 1701 * set device state and return. Device operation will be handled by 1702 * reset routine. See also comments above regarding rtnl. 1703 */ 1704 if (rc && 1705 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1706 adapter->state = VNIC_OPEN; 1707 rc = 0; 1708 } 1709 1710 if (rc) { 1711 release_resources(adapter); 1712 release_rx_pools(adapter); 1713 release_tx_pools(adapter); 1714 } 1715 1716 return rc; 1717 } 1718 1719 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1720 { 1721 struct ibmvnic_rx_pool *rx_pool; 1722 struct ibmvnic_rx_buff *rx_buff; 1723 u64 rx_entries; 1724 int rx_scrqs; 1725 int i, j; 1726 1727 if (!adapter->rx_pool) 1728 return; 1729 1730 rx_scrqs = adapter->num_active_rx_pools; 1731 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1732 1733 /* Free any remaining skbs in the rx buffer pools */ 1734 for (i = 0; i < rx_scrqs; i++) { 1735 rx_pool = &adapter->rx_pool[i]; 1736 if (!rx_pool || !rx_pool->rx_buff) 1737 continue; 1738 1739 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1740 for (j = 0; j < rx_entries; j++) { 1741 rx_buff = &rx_pool->rx_buff[j]; 1742 if (rx_buff && rx_buff->skb) { 1743 dev_kfree_skb_any(rx_buff->skb); 1744 rx_buff->skb = NULL; 1745 } 1746 } 1747 } 1748 } 1749 1750 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1751 struct ibmvnic_tx_pool *tx_pool) 1752 { 1753 struct ibmvnic_tx_buff *tx_buff; 1754 u64 tx_entries; 1755 int i; 1756 1757 if (!tx_pool || !tx_pool->tx_buff) 1758 return; 1759 1760 tx_entries = tx_pool->num_buffers; 1761 1762 for (i = 0; i < tx_entries; i++) { 1763 tx_buff = &tx_pool->tx_buff[i]; 1764 if (tx_buff && tx_buff->skb) { 1765 dev_kfree_skb_any(tx_buff->skb); 1766 tx_buff->skb = NULL; 1767 } 1768 } 1769 } 1770 1771 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1772 { 1773 int tx_scrqs; 1774 int i; 1775 1776 if (!adapter->tx_pool || !adapter->tso_pool) 1777 return; 1778 1779 tx_scrqs = adapter->num_active_tx_pools; 1780 1781 /* Free any remaining skbs in the tx buffer pools */ 1782 for (i = 0; i < tx_scrqs; i++) { 1783 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1784 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1785 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1786 } 1787 } 1788 1789 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1790 { 1791 struct net_device *netdev = adapter->netdev; 1792 int i; 1793 1794 if (adapter->tx_scrq) { 1795 for (i = 0; i < adapter->req_tx_queues; i++) 1796 if (adapter->tx_scrq[i]->irq) { 1797 netdev_dbg(netdev, 1798 "Disabling tx_scrq[%d] irq\n", i); 1799 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1800 disable_irq(adapter->tx_scrq[i]->irq); 1801 } 1802 } 1803 1804 if (adapter->rx_scrq) { 1805 for (i = 0; i < adapter->req_rx_queues; i++) { 1806 if (adapter->rx_scrq[i]->irq) { 1807 netdev_dbg(netdev, 1808 "Disabling rx_scrq[%d] irq\n", i); 1809 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1810 disable_irq(adapter->rx_scrq[i]->irq); 1811 } 1812 } 1813 } 1814 } 1815 1816 static void ibmvnic_cleanup(struct net_device *netdev) 1817 { 1818 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1819 1820 /* ensure that transmissions are stopped if called by do_reset */ 1821 1822 adapter->tx_queues_active = false; 1823 1824 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 1825 * update so they don't restart a queue after we stop it below. 1826 */ 1827 synchronize_rcu(); 1828 1829 if (test_bit(0, &adapter->resetting)) 1830 netif_tx_disable(netdev); 1831 else 1832 netif_tx_stop_all_queues(netdev); 1833 1834 ibmvnic_napi_disable(adapter); 1835 ibmvnic_disable_irqs(adapter); 1836 } 1837 1838 static int __ibmvnic_close(struct net_device *netdev) 1839 { 1840 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1841 int rc = 0; 1842 1843 adapter->state = VNIC_CLOSING; 1844 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1845 adapter->state = VNIC_CLOSED; 1846 return rc; 1847 } 1848 1849 static int ibmvnic_close(struct net_device *netdev) 1850 { 1851 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1852 int rc; 1853 1854 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1855 adapter_state_to_string(adapter->state), 1856 adapter->failover_pending, 1857 adapter->force_reset_recovery); 1858 1859 /* If device failover is pending, just set device state and return. 1860 * Device operation will be handled by reset routine. 1861 */ 1862 if (adapter->failover_pending) { 1863 adapter->state = VNIC_CLOSED; 1864 return 0; 1865 } 1866 1867 rc = __ibmvnic_close(netdev); 1868 ibmvnic_cleanup(netdev); 1869 clean_rx_pools(adapter); 1870 clean_tx_pools(adapter); 1871 1872 return rc; 1873 } 1874 1875 /** 1876 * build_hdr_data - creates L2/L3/L4 header data buffer 1877 * @hdr_field: bitfield determining needed headers 1878 * @skb: socket buffer 1879 * @hdr_len: array of header lengths 1880 * @hdr_data: buffer to write the header to 1881 * 1882 * Reads hdr_field to determine which headers are needed by firmware. 1883 * Builds a buffer containing these headers. Saves individual header 1884 * lengths and total buffer length to be used to build descriptors. 1885 */ 1886 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1887 int *hdr_len, u8 *hdr_data) 1888 { 1889 int len = 0; 1890 u8 *hdr; 1891 1892 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1893 hdr_len[0] = sizeof(struct vlan_ethhdr); 1894 else 1895 hdr_len[0] = sizeof(struct ethhdr); 1896 1897 if (skb->protocol == htons(ETH_P_IP)) { 1898 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1899 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1900 hdr_len[2] = tcp_hdrlen(skb); 1901 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1902 hdr_len[2] = sizeof(struct udphdr); 1903 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1904 hdr_len[1] = sizeof(struct ipv6hdr); 1905 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1906 hdr_len[2] = tcp_hdrlen(skb); 1907 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1908 hdr_len[2] = sizeof(struct udphdr); 1909 } else if (skb->protocol == htons(ETH_P_ARP)) { 1910 hdr_len[1] = arp_hdr_len(skb->dev); 1911 hdr_len[2] = 0; 1912 } 1913 1914 memset(hdr_data, 0, 120); 1915 if ((hdr_field >> 6) & 1) { 1916 hdr = skb_mac_header(skb); 1917 memcpy(hdr_data, hdr, hdr_len[0]); 1918 len += hdr_len[0]; 1919 } 1920 1921 if ((hdr_field >> 5) & 1) { 1922 hdr = skb_network_header(skb); 1923 memcpy(hdr_data + len, hdr, hdr_len[1]); 1924 len += hdr_len[1]; 1925 } 1926 1927 if ((hdr_field >> 4) & 1) { 1928 hdr = skb_transport_header(skb); 1929 memcpy(hdr_data + len, hdr, hdr_len[2]); 1930 len += hdr_len[2]; 1931 } 1932 return len; 1933 } 1934 1935 /** 1936 * create_hdr_descs - create header and header extension descriptors 1937 * @hdr_field: bitfield determining needed headers 1938 * @hdr_data: buffer containing header data 1939 * @len: length of data buffer 1940 * @hdr_len: array of individual header lengths 1941 * @scrq_arr: descriptor array 1942 * 1943 * Creates header and, if needed, header extension descriptors and 1944 * places them in a descriptor array, scrq_arr 1945 */ 1946 1947 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1948 union sub_crq *scrq_arr) 1949 { 1950 union sub_crq hdr_desc; 1951 int tmp_len = len; 1952 int num_descs = 0; 1953 u8 *data, *cur; 1954 int tmp; 1955 1956 while (tmp_len > 0) { 1957 cur = hdr_data + len - tmp_len; 1958 1959 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1960 if (cur != hdr_data) { 1961 data = hdr_desc.hdr_ext.data; 1962 tmp = tmp_len > 29 ? 29 : tmp_len; 1963 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1964 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1965 hdr_desc.hdr_ext.len = tmp; 1966 } else { 1967 data = hdr_desc.hdr.data; 1968 tmp = tmp_len > 24 ? 24 : tmp_len; 1969 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1970 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1971 hdr_desc.hdr.len = tmp; 1972 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1973 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1974 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1975 hdr_desc.hdr.flag = hdr_field << 1; 1976 } 1977 memcpy(data, cur, tmp); 1978 tmp_len -= tmp; 1979 *scrq_arr = hdr_desc; 1980 scrq_arr++; 1981 num_descs++; 1982 } 1983 1984 return num_descs; 1985 } 1986 1987 /** 1988 * build_hdr_descs_arr - build a header descriptor array 1989 * @skb: tx socket buffer 1990 * @indir_arr: indirect array 1991 * @num_entries: number of descriptors to be sent 1992 * @hdr_field: bit field determining which headers will be sent 1993 * 1994 * This function will build a TX descriptor array with applicable 1995 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1996 */ 1997 1998 static void build_hdr_descs_arr(struct sk_buff *skb, 1999 union sub_crq *indir_arr, 2000 int *num_entries, u8 hdr_field) 2001 { 2002 int hdr_len[3] = {0, 0, 0}; 2003 u8 hdr_data[140] = {0}; 2004 int tot_len; 2005 2006 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 2007 hdr_data); 2008 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 2009 indir_arr + 1); 2010 } 2011 2012 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 2013 struct net_device *netdev) 2014 { 2015 /* For some backing devices, mishandling of small packets 2016 * can result in a loss of connection or TX stall. Device 2017 * architects recommend that no packet should be smaller 2018 * than the minimum MTU value provided to the driver, so 2019 * pad any packets to that length 2020 */ 2021 if (skb->len < netdev->min_mtu) 2022 return skb_put_padto(skb, netdev->min_mtu); 2023 2024 return 0; 2025 } 2026 2027 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 2028 struct ibmvnic_sub_crq_queue *tx_scrq) 2029 { 2030 struct ibmvnic_ind_xmit_queue *ind_bufp; 2031 struct ibmvnic_tx_buff *tx_buff; 2032 struct ibmvnic_tx_pool *tx_pool; 2033 union sub_crq tx_scrq_entry; 2034 int queue_num; 2035 int entries; 2036 int index; 2037 int i; 2038 2039 ind_bufp = &tx_scrq->ind_buf; 2040 entries = (u64)ind_bufp->index; 2041 queue_num = tx_scrq->pool_index; 2042 2043 for (i = entries - 1; i >= 0; --i) { 2044 tx_scrq_entry = ind_bufp->indir_arr[i]; 2045 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 2046 continue; 2047 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 2048 if (index & IBMVNIC_TSO_POOL_MASK) { 2049 tx_pool = &adapter->tso_pool[queue_num]; 2050 index &= ~IBMVNIC_TSO_POOL_MASK; 2051 } else { 2052 tx_pool = &adapter->tx_pool[queue_num]; 2053 } 2054 tx_pool->free_map[tx_pool->consumer_index] = index; 2055 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2056 tx_pool->num_buffers - 1 : 2057 tx_pool->consumer_index - 1; 2058 tx_buff = &tx_pool->tx_buff[index]; 2059 adapter->netdev->stats.tx_packets--; 2060 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 2061 adapter->tx_stats_buffers[queue_num].packets--; 2062 adapter->tx_stats_buffers[queue_num].bytes -= 2063 tx_buff->skb->len; 2064 dev_kfree_skb_any(tx_buff->skb); 2065 tx_buff->skb = NULL; 2066 adapter->netdev->stats.tx_dropped++; 2067 } 2068 2069 ind_bufp->index = 0; 2070 2071 if (atomic_sub_return(entries, &tx_scrq->used) <= 2072 (adapter->req_tx_entries_per_subcrq / 2) && 2073 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 2074 rcu_read_lock(); 2075 2076 if (adapter->tx_queues_active) { 2077 netif_wake_subqueue(adapter->netdev, queue_num); 2078 netdev_dbg(adapter->netdev, "Started queue %d\n", 2079 queue_num); 2080 } 2081 2082 rcu_read_unlock(); 2083 } 2084 } 2085 2086 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 2087 struct ibmvnic_sub_crq_queue *tx_scrq) 2088 { 2089 struct ibmvnic_ind_xmit_queue *ind_bufp; 2090 u64 dma_addr; 2091 u64 entries; 2092 u64 handle; 2093 int rc; 2094 2095 ind_bufp = &tx_scrq->ind_buf; 2096 dma_addr = (u64)ind_bufp->indir_dma; 2097 entries = (u64)ind_bufp->index; 2098 handle = tx_scrq->handle; 2099 2100 if (!entries) 2101 return 0; 2102 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 2103 if (rc) 2104 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 2105 else 2106 ind_bufp->index = 0; 2107 return 0; 2108 } 2109 2110 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 2111 { 2112 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2113 int queue_num = skb_get_queue_mapping(skb); 2114 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 2115 struct device *dev = &adapter->vdev->dev; 2116 struct ibmvnic_ind_xmit_queue *ind_bufp; 2117 struct ibmvnic_tx_buff *tx_buff = NULL; 2118 struct ibmvnic_sub_crq_queue *tx_scrq; 2119 struct ibmvnic_long_term_buff *ltb; 2120 struct ibmvnic_tx_pool *tx_pool; 2121 unsigned int tx_send_failed = 0; 2122 netdev_tx_t ret = NETDEV_TX_OK; 2123 unsigned int tx_map_failed = 0; 2124 union sub_crq indir_arr[16]; 2125 unsigned int tx_dropped = 0; 2126 unsigned int tx_packets = 0; 2127 unsigned int tx_bytes = 0; 2128 dma_addr_t data_dma_addr; 2129 struct netdev_queue *txq; 2130 unsigned long lpar_rc; 2131 union sub_crq tx_crq; 2132 unsigned int offset; 2133 int num_entries = 1; 2134 unsigned char *dst; 2135 int bufidx = 0; 2136 u8 proto = 0; 2137 2138 /* If a reset is in progress, drop the packet since 2139 * the scrqs may get torn down. Otherwise use the 2140 * rcu to ensure reset waits for us to complete. 2141 */ 2142 rcu_read_lock(); 2143 if (!adapter->tx_queues_active) { 2144 dev_kfree_skb_any(skb); 2145 2146 tx_send_failed++; 2147 tx_dropped++; 2148 ret = NETDEV_TX_OK; 2149 goto out; 2150 } 2151 2152 tx_scrq = adapter->tx_scrq[queue_num]; 2153 txq = netdev_get_tx_queue(netdev, queue_num); 2154 ind_bufp = &tx_scrq->ind_buf; 2155 2156 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2157 tx_dropped++; 2158 tx_send_failed++; 2159 ret = NETDEV_TX_OK; 2160 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2161 goto out; 2162 } 2163 2164 if (skb_is_gso(skb)) 2165 tx_pool = &adapter->tso_pool[queue_num]; 2166 else 2167 tx_pool = &adapter->tx_pool[queue_num]; 2168 2169 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2170 2171 if (bufidx == IBMVNIC_INVALID_MAP) { 2172 dev_kfree_skb_any(skb); 2173 tx_send_failed++; 2174 tx_dropped++; 2175 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2176 ret = NETDEV_TX_OK; 2177 goto out; 2178 } 2179 2180 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2181 2182 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2183 2184 dst = ltb->buff + offset; 2185 memset(dst, 0, tx_pool->buf_size); 2186 data_dma_addr = ltb->addr + offset; 2187 2188 if (skb_shinfo(skb)->nr_frags) { 2189 int cur, i; 2190 2191 /* Copy the head */ 2192 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2193 cur = skb_headlen(skb); 2194 2195 /* Copy the frags */ 2196 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2197 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2198 2199 memcpy(dst + cur, skb_frag_address(frag), 2200 skb_frag_size(frag)); 2201 cur += skb_frag_size(frag); 2202 } 2203 } else { 2204 skb_copy_from_linear_data(skb, dst, skb->len); 2205 } 2206 2207 /* post changes to long_term_buff *dst before VIOS accessing it */ 2208 dma_wmb(); 2209 2210 tx_pool->consumer_index = 2211 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2212 2213 tx_buff = &tx_pool->tx_buff[bufidx]; 2214 tx_buff->skb = skb; 2215 tx_buff->index = bufidx; 2216 tx_buff->pool_index = queue_num; 2217 2218 memset(&tx_crq, 0, sizeof(tx_crq)); 2219 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2220 tx_crq.v1.type = IBMVNIC_TX_DESC; 2221 tx_crq.v1.n_crq_elem = 1; 2222 tx_crq.v1.n_sge = 1; 2223 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2224 2225 if (skb_is_gso(skb)) 2226 tx_crq.v1.correlator = 2227 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2228 else 2229 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2230 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2231 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2232 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2233 2234 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2235 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2236 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2237 } 2238 2239 if (skb->protocol == htons(ETH_P_IP)) { 2240 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2241 proto = ip_hdr(skb)->protocol; 2242 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2243 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2244 proto = ipv6_hdr(skb)->nexthdr; 2245 } 2246 2247 if (proto == IPPROTO_TCP) 2248 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2249 else if (proto == IPPROTO_UDP) 2250 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2251 2252 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2253 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2254 hdrs += 2; 2255 } 2256 if (skb_is_gso(skb)) { 2257 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2258 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2259 hdrs += 2; 2260 } 2261 2262 if ((*hdrs >> 7) & 1) 2263 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2264 2265 tx_crq.v1.n_crq_elem = num_entries; 2266 tx_buff->num_entries = num_entries; 2267 /* flush buffer if current entry can not fit */ 2268 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2269 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2270 if (lpar_rc != H_SUCCESS) 2271 goto tx_flush_err; 2272 } 2273 2274 indir_arr[0] = tx_crq; 2275 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2276 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2277 ind_bufp->index += num_entries; 2278 if (__netdev_tx_sent_queue(txq, skb->len, 2279 netdev_xmit_more() && 2280 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2281 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2282 if (lpar_rc != H_SUCCESS) 2283 goto tx_err; 2284 } 2285 2286 if (atomic_add_return(num_entries, &tx_scrq->used) 2287 >= adapter->req_tx_entries_per_subcrq) { 2288 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2289 netif_stop_subqueue(netdev, queue_num); 2290 } 2291 2292 tx_packets++; 2293 tx_bytes += skb->len; 2294 txq_trans_cond_update(txq); 2295 ret = NETDEV_TX_OK; 2296 goto out; 2297 2298 tx_flush_err: 2299 dev_kfree_skb_any(skb); 2300 tx_buff->skb = NULL; 2301 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2302 tx_pool->num_buffers - 1 : 2303 tx_pool->consumer_index - 1; 2304 tx_dropped++; 2305 tx_err: 2306 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2307 dev_err_ratelimited(dev, "tx: send failed\n"); 2308 2309 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2310 /* Disable TX and report carrier off if queue is closed 2311 * or pending failover. 2312 * Firmware guarantees that a signal will be sent to the 2313 * driver, triggering a reset or some other action. 2314 */ 2315 netif_tx_stop_all_queues(netdev); 2316 netif_carrier_off(netdev); 2317 } 2318 out: 2319 rcu_read_unlock(); 2320 netdev->stats.tx_dropped += tx_dropped; 2321 netdev->stats.tx_bytes += tx_bytes; 2322 netdev->stats.tx_packets += tx_packets; 2323 adapter->tx_send_failed += tx_send_failed; 2324 adapter->tx_map_failed += tx_map_failed; 2325 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2326 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2327 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2328 2329 return ret; 2330 } 2331 2332 static void ibmvnic_set_multi(struct net_device *netdev) 2333 { 2334 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2335 struct netdev_hw_addr *ha; 2336 union ibmvnic_crq crq; 2337 2338 memset(&crq, 0, sizeof(crq)); 2339 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2340 crq.request_capability.cmd = REQUEST_CAPABILITY; 2341 2342 if (netdev->flags & IFF_PROMISC) { 2343 if (!adapter->promisc_supported) 2344 return; 2345 } else { 2346 if (netdev->flags & IFF_ALLMULTI) { 2347 /* Accept all multicast */ 2348 memset(&crq, 0, sizeof(crq)); 2349 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2350 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2351 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2352 ibmvnic_send_crq(adapter, &crq); 2353 } else if (netdev_mc_empty(netdev)) { 2354 /* Reject all multicast */ 2355 memset(&crq, 0, sizeof(crq)); 2356 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2357 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2358 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2359 ibmvnic_send_crq(adapter, &crq); 2360 } else { 2361 /* Accept one or more multicast(s) */ 2362 netdev_for_each_mc_addr(ha, netdev) { 2363 memset(&crq, 0, sizeof(crq)); 2364 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2365 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2366 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2367 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2368 ha->addr); 2369 ibmvnic_send_crq(adapter, &crq); 2370 } 2371 } 2372 } 2373 } 2374 2375 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2376 { 2377 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2378 union ibmvnic_crq crq; 2379 int rc; 2380 2381 if (!is_valid_ether_addr(dev_addr)) { 2382 rc = -EADDRNOTAVAIL; 2383 goto err; 2384 } 2385 2386 memset(&crq, 0, sizeof(crq)); 2387 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2388 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2389 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2390 2391 mutex_lock(&adapter->fw_lock); 2392 adapter->fw_done_rc = 0; 2393 reinit_completion(&adapter->fw_done); 2394 2395 rc = ibmvnic_send_crq(adapter, &crq); 2396 if (rc) { 2397 rc = -EIO; 2398 mutex_unlock(&adapter->fw_lock); 2399 goto err; 2400 } 2401 2402 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2403 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2404 if (rc || adapter->fw_done_rc) { 2405 rc = -EIO; 2406 mutex_unlock(&adapter->fw_lock); 2407 goto err; 2408 } 2409 mutex_unlock(&adapter->fw_lock); 2410 return 0; 2411 err: 2412 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2413 return rc; 2414 } 2415 2416 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2417 { 2418 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2419 struct sockaddr *addr = p; 2420 int rc; 2421 2422 rc = 0; 2423 if (!is_valid_ether_addr(addr->sa_data)) 2424 return -EADDRNOTAVAIL; 2425 2426 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2427 if (adapter->state != VNIC_PROBED) 2428 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2429 2430 return rc; 2431 } 2432 2433 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2434 { 2435 switch (reason) { 2436 case VNIC_RESET_FAILOVER: 2437 return "FAILOVER"; 2438 case VNIC_RESET_MOBILITY: 2439 return "MOBILITY"; 2440 case VNIC_RESET_FATAL: 2441 return "FATAL"; 2442 case VNIC_RESET_NON_FATAL: 2443 return "NON_FATAL"; 2444 case VNIC_RESET_TIMEOUT: 2445 return "TIMEOUT"; 2446 case VNIC_RESET_CHANGE_PARAM: 2447 return "CHANGE_PARAM"; 2448 case VNIC_RESET_PASSIVE_INIT: 2449 return "PASSIVE_INIT"; 2450 } 2451 return "UNKNOWN"; 2452 } 2453 2454 /* 2455 * Initialize the init_done completion and return code values. We 2456 * can get a transport event just after registering the CRQ and the 2457 * tasklet will use this to communicate the transport event. To ensure 2458 * we don't miss the notification/error, initialize these _before_ 2459 * regisering the CRQ. 2460 */ 2461 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2462 { 2463 reinit_completion(&adapter->init_done); 2464 adapter->init_done_rc = 0; 2465 } 2466 2467 /* 2468 * do_reset returns zero if we are able to keep processing reset events, or 2469 * non-zero if we hit a fatal error and must halt. 2470 */ 2471 static int do_reset(struct ibmvnic_adapter *adapter, 2472 struct ibmvnic_rwi *rwi, u32 reset_state) 2473 { 2474 struct net_device *netdev = adapter->netdev; 2475 u64 old_num_rx_queues, old_num_tx_queues; 2476 u64 old_num_rx_slots, old_num_tx_slots; 2477 int rc; 2478 2479 netdev_dbg(adapter->netdev, 2480 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2481 adapter_state_to_string(adapter->state), 2482 adapter->failover_pending, 2483 reset_reason_to_string(rwi->reset_reason), 2484 adapter_state_to_string(reset_state)); 2485 2486 adapter->reset_reason = rwi->reset_reason; 2487 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2488 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2489 rtnl_lock(); 2490 2491 /* Now that we have the rtnl lock, clear any pending failover. 2492 * This will ensure ibmvnic_open() has either completed or will 2493 * block until failover is complete. 2494 */ 2495 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2496 adapter->failover_pending = false; 2497 2498 /* read the state and check (again) after getting rtnl */ 2499 reset_state = adapter->state; 2500 2501 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2502 rc = -EBUSY; 2503 goto out; 2504 } 2505 2506 netif_carrier_off(netdev); 2507 2508 old_num_rx_queues = adapter->req_rx_queues; 2509 old_num_tx_queues = adapter->req_tx_queues; 2510 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2511 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2512 2513 ibmvnic_cleanup(netdev); 2514 2515 if (reset_state == VNIC_OPEN && 2516 adapter->reset_reason != VNIC_RESET_MOBILITY && 2517 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2518 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2519 rc = __ibmvnic_close(netdev); 2520 if (rc) 2521 goto out; 2522 } else { 2523 adapter->state = VNIC_CLOSING; 2524 2525 /* Release the RTNL lock before link state change and 2526 * re-acquire after the link state change to allow 2527 * linkwatch_event to grab the RTNL lock and run during 2528 * a reset. 2529 */ 2530 rtnl_unlock(); 2531 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2532 rtnl_lock(); 2533 if (rc) 2534 goto out; 2535 2536 if (adapter->state == VNIC_OPEN) { 2537 /* When we dropped rtnl, ibmvnic_open() got 2538 * it and noticed that we are resetting and 2539 * set the adapter state to OPEN. Update our 2540 * new "target" state, and resume the reset 2541 * from VNIC_CLOSING state. 2542 */ 2543 netdev_dbg(netdev, 2544 "Open changed state from %s, updating.\n", 2545 adapter_state_to_string(reset_state)); 2546 reset_state = VNIC_OPEN; 2547 adapter->state = VNIC_CLOSING; 2548 } 2549 2550 if (adapter->state != VNIC_CLOSING) { 2551 /* If someone else changed the adapter state 2552 * when we dropped the rtnl, fail the reset 2553 */ 2554 rc = -EAGAIN; 2555 goto out; 2556 } 2557 adapter->state = VNIC_CLOSED; 2558 } 2559 } 2560 2561 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2562 release_resources(adapter); 2563 release_sub_crqs(adapter, 1); 2564 release_crq_queue(adapter); 2565 } 2566 2567 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2568 /* remove the closed state so when we call open it appears 2569 * we are coming from the probed state. 2570 */ 2571 adapter->state = VNIC_PROBED; 2572 2573 reinit_init_done(adapter); 2574 2575 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2576 rc = init_crq_queue(adapter); 2577 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2578 rc = ibmvnic_reenable_crq_queue(adapter); 2579 release_sub_crqs(adapter, 1); 2580 } else { 2581 rc = ibmvnic_reset_crq(adapter); 2582 if (rc == H_CLOSED || rc == H_SUCCESS) { 2583 rc = vio_enable_interrupts(adapter->vdev); 2584 if (rc) 2585 netdev_err(adapter->netdev, 2586 "Reset failed to enable interrupts. rc=%d\n", 2587 rc); 2588 } 2589 } 2590 2591 if (rc) { 2592 netdev_err(adapter->netdev, 2593 "Reset couldn't initialize crq. rc=%d\n", rc); 2594 goto out; 2595 } 2596 2597 rc = ibmvnic_reset_init(adapter, true); 2598 if (rc) 2599 goto out; 2600 2601 /* If the adapter was in PROBE or DOWN state prior to the reset, 2602 * exit here. 2603 */ 2604 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2605 rc = 0; 2606 goto out; 2607 } 2608 2609 rc = ibmvnic_login(netdev); 2610 if (rc) 2611 goto out; 2612 2613 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2614 rc = init_resources(adapter); 2615 if (rc) 2616 goto out; 2617 } else if (adapter->req_rx_queues != old_num_rx_queues || 2618 adapter->req_tx_queues != old_num_tx_queues || 2619 adapter->req_rx_add_entries_per_subcrq != 2620 old_num_rx_slots || 2621 adapter->req_tx_entries_per_subcrq != 2622 old_num_tx_slots || 2623 !adapter->rx_pool || 2624 !adapter->tso_pool || 2625 !adapter->tx_pool) { 2626 release_napi(adapter); 2627 release_vpd_data(adapter); 2628 2629 rc = init_resources(adapter); 2630 if (rc) 2631 goto out; 2632 2633 } else { 2634 rc = init_tx_pools(netdev); 2635 if (rc) { 2636 netdev_dbg(netdev, 2637 "init tx pools failed (%d)\n", 2638 rc); 2639 goto out; 2640 } 2641 2642 rc = init_rx_pools(netdev); 2643 if (rc) { 2644 netdev_dbg(netdev, 2645 "init rx pools failed (%d)\n", 2646 rc); 2647 goto out; 2648 } 2649 } 2650 ibmvnic_disable_irqs(adapter); 2651 } 2652 adapter->state = VNIC_CLOSED; 2653 2654 if (reset_state == VNIC_CLOSED) { 2655 rc = 0; 2656 goto out; 2657 } 2658 2659 rc = __ibmvnic_open(netdev); 2660 if (rc) { 2661 rc = IBMVNIC_OPEN_FAILED; 2662 goto out; 2663 } 2664 2665 /* refresh device's multicast list */ 2666 ibmvnic_set_multi(netdev); 2667 2668 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2669 adapter->reset_reason == VNIC_RESET_MOBILITY) 2670 __netdev_notify_peers(netdev); 2671 2672 rc = 0; 2673 2674 out: 2675 /* restore the adapter state if reset failed */ 2676 if (rc) 2677 adapter->state = reset_state; 2678 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2679 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2680 rtnl_unlock(); 2681 2682 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2683 adapter_state_to_string(adapter->state), 2684 adapter->failover_pending, rc); 2685 return rc; 2686 } 2687 2688 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2689 struct ibmvnic_rwi *rwi, u32 reset_state) 2690 { 2691 struct net_device *netdev = adapter->netdev; 2692 int rc; 2693 2694 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2695 reset_reason_to_string(rwi->reset_reason)); 2696 2697 /* read the state and check (again) after getting rtnl */ 2698 reset_state = adapter->state; 2699 2700 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2701 rc = -EBUSY; 2702 goto out; 2703 } 2704 2705 netif_carrier_off(netdev); 2706 adapter->reset_reason = rwi->reset_reason; 2707 2708 ibmvnic_cleanup(netdev); 2709 release_resources(adapter); 2710 release_sub_crqs(adapter, 0); 2711 release_crq_queue(adapter); 2712 2713 /* remove the closed state so when we call open it appears 2714 * we are coming from the probed state. 2715 */ 2716 adapter->state = VNIC_PROBED; 2717 2718 reinit_init_done(adapter); 2719 2720 rc = init_crq_queue(adapter); 2721 if (rc) { 2722 netdev_err(adapter->netdev, 2723 "Couldn't initialize crq. rc=%d\n", rc); 2724 goto out; 2725 } 2726 2727 rc = ibmvnic_reset_init(adapter, false); 2728 if (rc) 2729 goto out; 2730 2731 /* If the adapter was in PROBE or DOWN state prior to the reset, 2732 * exit here. 2733 */ 2734 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2735 goto out; 2736 2737 rc = ibmvnic_login(netdev); 2738 if (rc) 2739 goto out; 2740 2741 rc = init_resources(adapter); 2742 if (rc) 2743 goto out; 2744 2745 ibmvnic_disable_irqs(adapter); 2746 adapter->state = VNIC_CLOSED; 2747 2748 if (reset_state == VNIC_CLOSED) 2749 goto out; 2750 2751 rc = __ibmvnic_open(netdev); 2752 if (rc) { 2753 rc = IBMVNIC_OPEN_FAILED; 2754 goto out; 2755 } 2756 2757 __netdev_notify_peers(netdev); 2758 out: 2759 /* restore adapter state if reset failed */ 2760 if (rc) 2761 adapter->state = reset_state; 2762 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2763 adapter_state_to_string(adapter->state), 2764 adapter->failover_pending, rc); 2765 return rc; 2766 } 2767 2768 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2769 { 2770 struct ibmvnic_rwi *rwi; 2771 unsigned long flags; 2772 2773 spin_lock_irqsave(&adapter->rwi_lock, flags); 2774 2775 if (!list_empty(&adapter->rwi_list)) { 2776 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2777 list); 2778 list_del(&rwi->list); 2779 } else { 2780 rwi = NULL; 2781 } 2782 2783 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2784 return rwi; 2785 } 2786 2787 /** 2788 * do_passive_init - complete probing when partner device is detected. 2789 * @adapter: ibmvnic_adapter struct 2790 * 2791 * If the ibmvnic device does not have a partner device to communicate with at boot 2792 * and that partner device comes online at a later time, this function is called 2793 * to complete the initialization process of ibmvnic device. 2794 * Caller is expected to hold rtnl_lock(). 2795 * 2796 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2797 * in the down state. 2798 * Returns 0 upon success and the device is in PROBED state. 2799 */ 2800 2801 static int do_passive_init(struct ibmvnic_adapter *adapter) 2802 { 2803 unsigned long timeout = msecs_to_jiffies(30000); 2804 struct net_device *netdev = adapter->netdev; 2805 struct device *dev = &adapter->vdev->dev; 2806 int rc; 2807 2808 netdev_dbg(netdev, "Partner device found, probing.\n"); 2809 2810 adapter->state = VNIC_PROBING; 2811 reinit_completion(&adapter->init_done); 2812 adapter->init_done_rc = 0; 2813 adapter->crq.active = true; 2814 2815 rc = send_crq_init_complete(adapter); 2816 if (rc) 2817 goto out; 2818 2819 rc = send_version_xchg(adapter); 2820 if (rc) 2821 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2822 2823 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2824 dev_err(dev, "Initialization sequence timed out\n"); 2825 rc = -ETIMEDOUT; 2826 goto out; 2827 } 2828 2829 rc = init_sub_crqs(adapter); 2830 if (rc) { 2831 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2832 goto out; 2833 } 2834 2835 rc = init_sub_crq_irqs(adapter); 2836 if (rc) { 2837 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2838 goto init_failed; 2839 } 2840 2841 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2842 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2843 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2844 2845 adapter->state = VNIC_PROBED; 2846 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2847 2848 return 0; 2849 2850 init_failed: 2851 release_sub_crqs(adapter, 1); 2852 out: 2853 adapter->state = VNIC_DOWN; 2854 return rc; 2855 } 2856 2857 static void __ibmvnic_reset(struct work_struct *work) 2858 { 2859 struct ibmvnic_adapter *adapter; 2860 unsigned int timeout = 5000; 2861 struct ibmvnic_rwi *tmprwi; 2862 bool saved_state = false; 2863 struct ibmvnic_rwi *rwi; 2864 unsigned long flags; 2865 struct device *dev; 2866 bool need_reset; 2867 int num_fails = 0; 2868 u32 reset_state; 2869 int rc = 0; 2870 2871 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2872 dev = &adapter->vdev->dev; 2873 2874 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 2875 * or if another reset is in progress, defer work for now. If probe 2876 * eventually fails it will flush and terminate our work. 2877 * 2878 * Three possibilities here: 2879 * 1. Adpater being removed - just return 2880 * 2. Timed out on probe or another reset in progress - delay the work 2881 * 3. Completed probe - perform any resets in queue 2882 */ 2883 if (adapter->state == VNIC_PROBING && 2884 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 2885 dev_err(dev, "Reset thread timed out on probe"); 2886 queue_delayed_work(system_long_wq, 2887 &adapter->ibmvnic_delayed_reset, 2888 IBMVNIC_RESET_DELAY); 2889 return; 2890 } 2891 2892 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 2893 if (adapter->state == VNIC_REMOVING) 2894 return; 2895 2896 /* ->rwi_list is stable now (no one else is removing entries) */ 2897 2898 /* ibmvnic_probe() may have purged the reset queue after we were 2899 * scheduled to process a reset so there maybe no resets to process. 2900 * Before setting the ->resetting bit though, we have to make sure 2901 * that there is infact a reset to process. Otherwise we may race 2902 * with ibmvnic_open() and end up leaving the vnic down: 2903 * 2904 * __ibmvnic_reset() ibmvnic_open() 2905 * ----------------- -------------- 2906 * 2907 * set ->resetting bit 2908 * find ->resetting bit is set 2909 * set ->state to IBMVNIC_OPEN (i.e 2910 * assume reset will open device) 2911 * return 2912 * find reset queue empty 2913 * return 2914 * 2915 * Neither performed vnic login/open and vnic stays down 2916 * 2917 * If we hold the lock and conditionally set the bit, either we 2918 * or ibmvnic_open() will complete the open. 2919 */ 2920 need_reset = false; 2921 spin_lock(&adapter->rwi_lock); 2922 if (!list_empty(&adapter->rwi_list)) { 2923 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2924 queue_delayed_work(system_long_wq, 2925 &adapter->ibmvnic_delayed_reset, 2926 IBMVNIC_RESET_DELAY); 2927 } else { 2928 need_reset = true; 2929 } 2930 } 2931 spin_unlock(&adapter->rwi_lock); 2932 2933 if (!need_reset) 2934 return; 2935 2936 rwi = get_next_rwi(adapter); 2937 while (rwi) { 2938 spin_lock_irqsave(&adapter->state_lock, flags); 2939 2940 if (adapter->state == VNIC_REMOVING || 2941 adapter->state == VNIC_REMOVED) { 2942 spin_unlock_irqrestore(&adapter->state_lock, flags); 2943 kfree(rwi); 2944 rc = EBUSY; 2945 break; 2946 } 2947 2948 if (!saved_state) { 2949 reset_state = adapter->state; 2950 saved_state = true; 2951 } 2952 spin_unlock_irqrestore(&adapter->state_lock, flags); 2953 2954 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2955 rtnl_lock(); 2956 rc = do_passive_init(adapter); 2957 rtnl_unlock(); 2958 if (!rc) 2959 netif_carrier_on(adapter->netdev); 2960 } else if (adapter->force_reset_recovery) { 2961 /* Since we are doing a hard reset now, clear the 2962 * failover_pending flag so we don't ignore any 2963 * future MOBILITY or other resets. 2964 */ 2965 adapter->failover_pending = false; 2966 2967 /* Transport event occurred during previous reset */ 2968 if (adapter->wait_for_reset) { 2969 /* Previous was CHANGE_PARAM; caller locked */ 2970 adapter->force_reset_recovery = false; 2971 rc = do_hard_reset(adapter, rwi, reset_state); 2972 } else { 2973 rtnl_lock(); 2974 adapter->force_reset_recovery = false; 2975 rc = do_hard_reset(adapter, rwi, reset_state); 2976 rtnl_unlock(); 2977 } 2978 if (rc) 2979 num_fails++; 2980 else 2981 num_fails = 0; 2982 2983 /* If auto-priority-failover is enabled we can get 2984 * back to back failovers during resets, resulting 2985 * in at least two failed resets (from high-priority 2986 * backing device to low-priority one and then back) 2987 * If resets continue to fail beyond that, give the 2988 * adapter some time to settle down before retrying. 2989 */ 2990 if (num_fails >= 3) { 2991 netdev_dbg(adapter->netdev, 2992 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 2993 adapter_state_to_string(adapter->state), 2994 num_fails); 2995 set_current_state(TASK_UNINTERRUPTIBLE); 2996 schedule_timeout(60 * HZ); 2997 } 2998 } else { 2999 rc = do_reset(adapter, rwi, reset_state); 3000 } 3001 tmprwi = rwi; 3002 adapter->last_reset_time = jiffies; 3003 3004 if (rc) 3005 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3006 3007 rwi = get_next_rwi(adapter); 3008 3009 /* 3010 * If there is another reset queued, free the previous rwi 3011 * and process the new reset even if previous reset failed 3012 * (the previous reset could have failed because of a fail 3013 * over for instance, so process the fail over). 3014 * 3015 * If there are no resets queued and the previous reset failed, 3016 * the adapter would be in an undefined state. So retry the 3017 * previous reset as a hard reset. 3018 */ 3019 if (rwi) 3020 kfree(tmprwi); 3021 else if (rc) 3022 rwi = tmprwi; 3023 3024 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3025 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3026 adapter->force_reset_recovery = true; 3027 } 3028 3029 if (adapter->wait_for_reset) { 3030 adapter->reset_done_rc = rc; 3031 complete(&adapter->reset_done); 3032 } 3033 3034 clear_bit_unlock(0, &adapter->resetting); 3035 3036 netdev_dbg(adapter->netdev, 3037 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3038 adapter_state_to_string(adapter->state), 3039 adapter->force_reset_recovery, 3040 adapter->wait_for_reset); 3041 } 3042 3043 static void __ibmvnic_delayed_reset(struct work_struct *work) 3044 { 3045 struct ibmvnic_adapter *adapter; 3046 3047 adapter = container_of(work, struct ibmvnic_adapter, 3048 ibmvnic_delayed_reset.work); 3049 __ibmvnic_reset(&adapter->ibmvnic_reset); 3050 } 3051 3052 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3053 { 3054 struct list_head *entry, *tmp_entry; 3055 3056 if (!list_empty(&adapter->rwi_list)) { 3057 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3058 list_del(entry); 3059 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3060 } 3061 } 3062 } 3063 3064 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3065 enum ibmvnic_reset_reason reason) 3066 { 3067 struct net_device *netdev = adapter->netdev; 3068 struct ibmvnic_rwi *rwi, *tmp; 3069 unsigned long flags; 3070 int ret; 3071 3072 spin_lock_irqsave(&adapter->rwi_lock, flags); 3073 3074 /* If failover is pending don't schedule any other reset. 3075 * Instead let the failover complete. If there is already a 3076 * a failover reset scheduled, we will detect and drop the 3077 * duplicate reset when walking the ->rwi_list below. 3078 */ 3079 if (adapter->state == VNIC_REMOVING || 3080 adapter->state == VNIC_REMOVED || 3081 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3082 ret = EBUSY; 3083 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3084 goto err; 3085 } 3086 3087 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3088 if (tmp->reset_reason == reason) { 3089 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3090 reset_reason_to_string(reason)); 3091 ret = EBUSY; 3092 goto err; 3093 } 3094 } 3095 3096 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3097 if (!rwi) { 3098 ret = ENOMEM; 3099 goto err; 3100 } 3101 /* if we just received a transport event, 3102 * flush reset queue and process this reset 3103 */ 3104 if (adapter->force_reset_recovery) 3105 flush_reset_queue(adapter); 3106 3107 rwi->reset_reason = reason; 3108 list_add_tail(&rwi->list, &adapter->rwi_list); 3109 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3110 reset_reason_to_string(reason)); 3111 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3112 3113 ret = 0; 3114 err: 3115 /* ibmvnic_close() below can block, so drop the lock first */ 3116 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3117 3118 if (ret == ENOMEM) 3119 ibmvnic_close(netdev); 3120 3121 return -ret; 3122 } 3123 3124 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3125 { 3126 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3127 3128 if (test_bit(0, &adapter->resetting)) { 3129 netdev_err(adapter->netdev, 3130 "Adapter is resetting, skip timeout reset\n"); 3131 return; 3132 } 3133 /* No queuing up reset until at least 5 seconds (default watchdog val) 3134 * after last reset 3135 */ 3136 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3137 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3138 return; 3139 } 3140 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3141 } 3142 3143 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3144 struct ibmvnic_rx_buff *rx_buff) 3145 { 3146 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3147 3148 rx_buff->skb = NULL; 3149 3150 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3151 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3152 3153 atomic_dec(&pool->available); 3154 } 3155 3156 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3157 { 3158 struct ibmvnic_sub_crq_queue *rx_scrq; 3159 struct ibmvnic_adapter *adapter; 3160 struct net_device *netdev; 3161 int frames_processed; 3162 int scrq_num; 3163 3164 netdev = napi->dev; 3165 adapter = netdev_priv(netdev); 3166 scrq_num = (int)(napi - adapter->napi); 3167 frames_processed = 0; 3168 rx_scrq = adapter->rx_scrq[scrq_num]; 3169 3170 restart_poll: 3171 while (frames_processed < budget) { 3172 struct sk_buff *skb; 3173 struct ibmvnic_rx_buff *rx_buff; 3174 union sub_crq *next; 3175 u32 length; 3176 u16 offset; 3177 u8 flags = 0; 3178 3179 if (unlikely(test_bit(0, &adapter->resetting) && 3180 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3181 enable_scrq_irq(adapter, rx_scrq); 3182 napi_complete_done(napi, frames_processed); 3183 return frames_processed; 3184 } 3185 3186 if (!pending_scrq(adapter, rx_scrq)) 3187 break; 3188 next = ibmvnic_next_scrq(adapter, rx_scrq); 3189 rx_buff = (struct ibmvnic_rx_buff *) 3190 be64_to_cpu(next->rx_comp.correlator); 3191 /* do error checking */ 3192 if (next->rx_comp.rc) { 3193 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3194 be16_to_cpu(next->rx_comp.rc)); 3195 /* free the entry */ 3196 next->rx_comp.first = 0; 3197 dev_kfree_skb_any(rx_buff->skb); 3198 remove_buff_from_pool(adapter, rx_buff); 3199 continue; 3200 } else if (!rx_buff->skb) { 3201 /* free the entry */ 3202 next->rx_comp.first = 0; 3203 remove_buff_from_pool(adapter, rx_buff); 3204 continue; 3205 } 3206 3207 length = be32_to_cpu(next->rx_comp.len); 3208 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3209 flags = next->rx_comp.flags; 3210 skb = rx_buff->skb; 3211 /* load long_term_buff before copying to skb */ 3212 dma_rmb(); 3213 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3214 length); 3215 3216 /* VLAN Header has been stripped by the system firmware and 3217 * needs to be inserted by the driver 3218 */ 3219 if (adapter->rx_vlan_header_insertion && 3220 (flags & IBMVNIC_VLAN_STRIPPED)) 3221 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3222 ntohs(next->rx_comp.vlan_tci)); 3223 3224 /* free the entry */ 3225 next->rx_comp.first = 0; 3226 remove_buff_from_pool(adapter, rx_buff); 3227 3228 skb_put(skb, length); 3229 skb->protocol = eth_type_trans(skb, netdev); 3230 skb_record_rx_queue(skb, scrq_num); 3231 3232 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3233 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3234 skb->ip_summed = CHECKSUM_UNNECESSARY; 3235 } 3236 3237 length = skb->len; 3238 napi_gro_receive(napi, skb); /* send it up */ 3239 netdev->stats.rx_packets++; 3240 netdev->stats.rx_bytes += length; 3241 adapter->rx_stats_buffers[scrq_num].packets++; 3242 adapter->rx_stats_buffers[scrq_num].bytes += length; 3243 frames_processed++; 3244 } 3245 3246 if (adapter->state != VNIC_CLOSING && 3247 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 3248 adapter->req_rx_add_entries_per_subcrq / 2) || 3249 frames_processed < budget)) 3250 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3251 if (frames_processed < budget) { 3252 if (napi_complete_done(napi, frames_processed)) { 3253 enable_scrq_irq(adapter, rx_scrq); 3254 if (pending_scrq(adapter, rx_scrq)) { 3255 if (napi_reschedule(napi)) { 3256 disable_scrq_irq(adapter, rx_scrq); 3257 goto restart_poll; 3258 } 3259 } 3260 } 3261 } 3262 return frames_processed; 3263 } 3264 3265 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3266 { 3267 int rc, ret; 3268 3269 adapter->fallback.mtu = adapter->req_mtu; 3270 adapter->fallback.rx_queues = adapter->req_rx_queues; 3271 adapter->fallback.tx_queues = adapter->req_tx_queues; 3272 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3273 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3274 3275 reinit_completion(&adapter->reset_done); 3276 adapter->wait_for_reset = true; 3277 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3278 3279 if (rc) { 3280 ret = rc; 3281 goto out; 3282 } 3283 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3284 if (rc) { 3285 ret = -ENODEV; 3286 goto out; 3287 } 3288 3289 ret = 0; 3290 if (adapter->reset_done_rc) { 3291 ret = -EIO; 3292 adapter->desired.mtu = adapter->fallback.mtu; 3293 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3294 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3295 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3296 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3297 3298 reinit_completion(&adapter->reset_done); 3299 adapter->wait_for_reset = true; 3300 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3301 if (rc) { 3302 ret = rc; 3303 goto out; 3304 } 3305 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3306 60000); 3307 if (rc) { 3308 ret = -ENODEV; 3309 goto out; 3310 } 3311 } 3312 out: 3313 adapter->wait_for_reset = false; 3314 3315 return ret; 3316 } 3317 3318 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3319 { 3320 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3321 3322 adapter->desired.mtu = new_mtu + ETH_HLEN; 3323 3324 return wait_for_reset(adapter); 3325 } 3326 3327 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3328 struct net_device *dev, 3329 netdev_features_t features) 3330 { 3331 /* Some backing hardware adapters can not 3332 * handle packets with a MSS less than 224 3333 * or with only one segment. 3334 */ 3335 if (skb_is_gso(skb)) { 3336 if (skb_shinfo(skb)->gso_size < 224 || 3337 skb_shinfo(skb)->gso_segs == 1) 3338 features &= ~NETIF_F_GSO_MASK; 3339 } 3340 3341 return features; 3342 } 3343 3344 static const struct net_device_ops ibmvnic_netdev_ops = { 3345 .ndo_open = ibmvnic_open, 3346 .ndo_stop = ibmvnic_close, 3347 .ndo_start_xmit = ibmvnic_xmit, 3348 .ndo_set_rx_mode = ibmvnic_set_multi, 3349 .ndo_set_mac_address = ibmvnic_set_mac, 3350 .ndo_validate_addr = eth_validate_addr, 3351 .ndo_tx_timeout = ibmvnic_tx_timeout, 3352 .ndo_change_mtu = ibmvnic_change_mtu, 3353 .ndo_features_check = ibmvnic_features_check, 3354 }; 3355 3356 /* ethtool functions */ 3357 3358 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3359 struct ethtool_link_ksettings *cmd) 3360 { 3361 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3362 int rc; 3363 3364 rc = send_query_phys_parms(adapter); 3365 if (rc) { 3366 adapter->speed = SPEED_UNKNOWN; 3367 adapter->duplex = DUPLEX_UNKNOWN; 3368 } 3369 cmd->base.speed = adapter->speed; 3370 cmd->base.duplex = adapter->duplex; 3371 cmd->base.port = PORT_FIBRE; 3372 cmd->base.phy_address = 0; 3373 cmd->base.autoneg = AUTONEG_ENABLE; 3374 3375 return 0; 3376 } 3377 3378 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3379 struct ethtool_drvinfo *info) 3380 { 3381 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3382 3383 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3384 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3385 strscpy(info->fw_version, adapter->fw_version, 3386 sizeof(info->fw_version)); 3387 } 3388 3389 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3390 { 3391 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3392 3393 return adapter->msg_enable; 3394 } 3395 3396 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3397 { 3398 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3399 3400 adapter->msg_enable = data; 3401 } 3402 3403 static u32 ibmvnic_get_link(struct net_device *netdev) 3404 { 3405 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3406 3407 /* Don't need to send a query because we request a logical link up at 3408 * init and then we wait for link state indications 3409 */ 3410 return adapter->logical_link_state; 3411 } 3412 3413 static void ibmvnic_get_ringparam(struct net_device *netdev, 3414 struct ethtool_ringparam *ring, 3415 struct kernel_ethtool_ringparam *kernel_ring, 3416 struct netlink_ext_ack *extack) 3417 { 3418 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3419 3420 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3421 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3422 ring->rx_mini_max_pending = 0; 3423 ring->rx_jumbo_max_pending = 0; 3424 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3425 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3426 ring->rx_mini_pending = 0; 3427 ring->rx_jumbo_pending = 0; 3428 } 3429 3430 static int ibmvnic_set_ringparam(struct net_device *netdev, 3431 struct ethtool_ringparam *ring, 3432 struct kernel_ethtool_ringparam *kernel_ring, 3433 struct netlink_ext_ack *extack) 3434 { 3435 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3436 3437 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3438 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3439 netdev_err(netdev, "Invalid request.\n"); 3440 netdev_err(netdev, "Max tx buffers = %llu\n", 3441 adapter->max_rx_add_entries_per_subcrq); 3442 netdev_err(netdev, "Max rx buffers = %llu\n", 3443 adapter->max_tx_entries_per_subcrq); 3444 return -EINVAL; 3445 } 3446 3447 adapter->desired.rx_entries = ring->rx_pending; 3448 adapter->desired.tx_entries = ring->tx_pending; 3449 3450 return wait_for_reset(adapter); 3451 } 3452 3453 static void ibmvnic_get_channels(struct net_device *netdev, 3454 struct ethtool_channels *channels) 3455 { 3456 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3457 3458 channels->max_rx = adapter->max_rx_queues; 3459 channels->max_tx = adapter->max_tx_queues; 3460 channels->max_other = 0; 3461 channels->max_combined = 0; 3462 channels->rx_count = adapter->req_rx_queues; 3463 channels->tx_count = adapter->req_tx_queues; 3464 channels->other_count = 0; 3465 channels->combined_count = 0; 3466 } 3467 3468 static int ibmvnic_set_channels(struct net_device *netdev, 3469 struct ethtool_channels *channels) 3470 { 3471 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3472 3473 adapter->desired.rx_queues = channels->rx_count; 3474 adapter->desired.tx_queues = channels->tx_count; 3475 3476 return wait_for_reset(adapter); 3477 } 3478 3479 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3480 { 3481 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3482 int i; 3483 3484 if (stringset != ETH_SS_STATS) 3485 return; 3486 3487 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 3488 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3489 3490 for (i = 0; i < adapter->req_tx_queues; i++) { 3491 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3492 data += ETH_GSTRING_LEN; 3493 3494 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3495 data += ETH_GSTRING_LEN; 3496 3497 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 3498 data += ETH_GSTRING_LEN; 3499 } 3500 3501 for (i = 0; i < adapter->req_rx_queues; i++) { 3502 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3503 data += ETH_GSTRING_LEN; 3504 3505 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3506 data += ETH_GSTRING_LEN; 3507 3508 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3509 data += ETH_GSTRING_LEN; 3510 } 3511 } 3512 3513 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3514 { 3515 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3516 3517 switch (sset) { 3518 case ETH_SS_STATS: 3519 return ARRAY_SIZE(ibmvnic_stats) + 3520 adapter->req_tx_queues * NUM_TX_STATS + 3521 adapter->req_rx_queues * NUM_RX_STATS; 3522 default: 3523 return -EOPNOTSUPP; 3524 } 3525 } 3526 3527 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3528 struct ethtool_stats *stats, u64 *data) 3529 { 3530 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3531 union ibmvnic_crq crq; 3532 int i, j; 3533 int rc; 3534 3535 memset(&crq, 0, sizeof(crq)); 3536 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3537 crq.request_statistics.cmd = REQUEST_STATISTICS; 3538 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3539 crq.request_statistics.len = 3540 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3541 3542 /* Wait for data to be written */ 3543 reinit_completion(&adapter->stats_done); 3544 rc = ibmvnic_send_crq(adapter, &crq); 3545 if (rc) 3546 return; 3547 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3548 if (rc) 3549 return; 3550 3551 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3552 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3553 (adapter, ibmvnic_stats[i].offset)); 3554 3555 for (j = 0; j < adapter->req_tx_queues; j++) { 3556 data[i] = adapter->tx_stats_buffers[j].packets; 3557 i++; 3558 data[i] = adapter->tx_stats_buffers[j].bytes; 3559 i++; 3560 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3561 i++; 3562 } 3563 3564 for (j = 0; j < adapter->req_rx_queues; j++) { 3565 data[i] = adapter->rx_stats_buffers[j].packets; 3566 i++; 3567 data[i] = adapter->rx_stats_buffers[j].bytes; 3568 i++; 3569 data[i] = adapter->rx_stats_buffers[j].interrupts; 3570 i++; 3571 } 3572 } 3573 3574 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3575 .get_drvinfo = ibmvnic_get_drvinfo, 3576 .get_msglevel = ibmvnic_get_msglevel, 3577 .set_msglevel = ibmvnic_set_msglevel, 3578 .get_link = ibmvnic_get_link, 3579 .get_ringparam = ibmvnic_get_ringparam, 3580 .set_ringparam = ibmvnic_set_ringparam, 3581 .get_channels = ibmvnic_get_channels, 3582 .set_channels = ibmvnic_set_channels, 3583 .get_strings = ibmvnic_get_strings, 3584 .get_sset_count = ibmvnic_get_sset_count, 3585 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3586 .get_link_ksettings = ibmvnic_get_link_ksettings, 3587 }; 3588 3589 /* Routines for managing CRQs/sCRQs */ 3590 3591 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3592 struct ibmvnic_sub_crq_queue *scrq) 3593 { 3594 int rc; 3595 3596 if (!scrq) { 3597 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3598 return -EINVAL; 3599 } 3600 3601 if (scrq->irq) { 3602 free_irq(scrq->irq, scrq); 3603 irq_dispose_mapping(scrq->irq); 3604 scrq->irq = 0; 3605 } 3606 3607 if (scrq->msgs) { 3608 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3609 atomic_set(&scrq->used, 0); 3610 scrq->cur = 0; 3611 scrq->ind_buf.index = 0; 3612 } else { 3613 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3614 return -EINVAL; 3615 } 3616 3617 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3618 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3619 return rc; 3620 } 3621 3622 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3623 { 3624 int i, rc; 3625 3626 if (!adapter->tx_scrq || !adapter->rx_scrq) 3627 return -EINVAL; 3628 3629 for (i = 0; i < adapter->req_tx_queues; i++) { 3630 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3631 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3632 if (rc) 3633 return rc; 3634 } 3635 3636 for (i = 0; i < adapter->req_rx_queues; i++) { 3637 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3638 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3639 if (rc) 3640 return rc; 3641 } 3642 3643 return rc; 3644 } 3645 3646 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3647 struct ibmvnic_sub_crq_queue *scrq, 3648 bool do_h_free) 3649 { 3650 struct device *dev = &adapter->vdev->dev; 3651 long rc; 3652 3653 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3654 3655 if (do_h_free) { 3656 /* Close the sub-crqs */ 3657 do { 3658 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3659 adapter->vdev->unit_address, 3660 scrq->crq_num); 3661 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3662 3663 if (rc) { 3664 netdev_err(adapter->netdev, 3665 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3666 scrq->crq_num, rc); 3667 } 3668 } 3669 3670 dma_free_coherent(dev, 3671 IBMVNIC_IND_ARR_SZ, 3672 scrq->ind_buf.indir_arr, 3673 scrq->ind_buf.indir_dma); 3674 3675 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3676 DMA_BIDIRECTIONAL); 3677 free_pages((unsigned long)scrq->msgs, 2); 3678 kfree(scrq); 3679 } 3680 3681 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3682 *adapter) 3683 { 3684 struct device *dev = &adapter->vdev->dev; 3685 struct ibmvnic_sub_crq_queue *scrq; 3686 int rc; 3687 3688 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3689 if (!scrq) 3690 return NULL; 3691 3692 scrq->msgs = 3693 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3694 if (!scrq->msgs) { 3695 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3696 goto zero_page_failed; 3697 } 3698 3699 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3700 DMA_BIDIRECTIONAL); 3701 if (dma_mapping_error(dev, scrq->msg_token)) { 3702 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3703 goto map_failed; 3704 } 3705 3706 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3707 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3708 3709 if (rc == H_RESOURCE) 3710 rc = ibmvnic_reset_crq(adapter); 3711 3712 if (rc == H_CLOSED) { 3713 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3714 } else if (rc) { 3715 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3716 goto reg_failed; 3717 } 3718 3719 scrq->adapter = adapter; 3720 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3721 scrq->ind_buf.index = 0; 3722 3723 scrq->ind_buf.indir_arr = 3724 dma_alloc_coherent(dev, 3725 IBMVNIC_IND_ARR_SZ, 3726 &scrq->ind_buf.indir_dma, 3727 GFP_KERNEL); 3728 3729 if (!scrq->ind_buf.indir_arr) 3730 goto indir_failed; 3731 3732 spin_lock_init(&scrq->lock); 3733 3734 netdev_dbg(adapter->netdev, 3735 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3736 scrq->crq_num, scrq->hw_irq, scrq->irq); 3737 3738 return scrq; 3739 3740 indir_failed: 3741 do { 3742 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3743 adapter->vdev->unit_address, 3744 scrq->crq_num); 3745 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3746 reg_failed: 3747 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3748 DMA_BIDIRECTIONAL); 3749 map_failed: 3750 free_pages((unsigned long)scrq->msgs, 2); 3751 zero_page_failed: 3752 kfree(scrq); 3753 3754 return NULL; 3755 } 3756 3757 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3758 { 3759 int i; 3760 3761 if (adapter->tx_scrq) { 3762 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3763 if (!adapter->tx_scrq[i]) 3764 continue; 3765 3766 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3767 i); 3768 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3769 if (adapter->tx_scrq[i]->irq) { 3770 free_irq(adapter->tx_scrq[i]->irq, 3771 adapter->tx_scrq[i]); 3772 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3773 adapter->tx_scrq[i]->irq = 0; 3774 } 3775 3776 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3777 do_h_free); 3778 } 3779 3780 kfree(adapter->tx_scrq); 3781 adapter->tx_scrq = NULL; 3782 adapter->num_active_tx_scrqs = 0; 3783 } 3784 3785 if (adapter->rx_scrq) { 3786 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3787 if (!adapter->rx_scrq[i]) 3788 continue; 3789 3790 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3791 i); 3792 if (adapter->rx_scrq[i]->irq) { 3793 free_irq(adapter->rx_scrq[i]->irq, 3794 adapter->rx_scrq[i]); 3795 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3796 adapter->rx_scrq[i]->irq = 0; 3797 } 3798 3799 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3800 do_h_free); 3801 } 3802 3803 kfree(adapter->rx_scrq); 3804 adapter->rx_scrq = NULL; 3805 adapter->num_active_rx_scrqs = 0; 3806 } 3807 } 3808 3809 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3810 struct ibmvnic_sub_crq_queue *scrq) 3811 { 3812 struct device *dev = &adapter->vdev->dev; 3813 unsigned long rc; 3814 3815 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3816 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3817 if (rc) 3818 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3819 scrq->hw_irq, rc); 3820 return rc; 3821 } 3822 3823 /* We can not use the IRQ chip EOI handler because that has the 3824 * unintended effect of changing the interrupt priority. 3825 */ 3826 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 3827 { 3828 u64 val = 0xff000000 | scrq->hw_irq; 3829 unsigned long rc; 3830 3831 rc = plpar_hcall_norets(H_EOI, val); 3832 if (rc) 3833 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 3834 } 3835 3836 /* Due to a firmware bug, the hypervisor can send an interrupt to a 3837 * transmit or receive queue just prior to a partition migration. 3838 * Force an EOI after migration. 3839 */ 3840 static void ibmvnic_clear_pending_interrupt(struct device *dev, 3841 struct ibmvnic_sub_crq_queue *scrq) 3842 { 3843 if (!xive_enabled()) 3844 ibmvnic_xics_eoi(dev, scrq); 3845 } 3846 3847 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3848 struct ibmvnic_sub_crq_queue *scrq) 3849 { 3850 struct device *dev = &adapter->vdev->dev; 3851 unsigned long rc; 3852 3853 if (scrq->hw_irq > 0x100000000ULL) { 3854 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3855 return 1; 3856 } 3857 3858 if (test_bit(0, &adapter->resetting) && 3859 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3860 ibmvnic_clear_pending_interrupt(dev, scrq); 3861 } 3862 3863 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3864 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3865 if (rc) 3866 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3867 scrq->hw_irq, rc); 3868 return rc; 3869 } 3870 3871 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3872 struct ibmvnic_sub_crq_queue *scrq) 3873 { 3874 struct device *dev = &adapter->vdev->dev; 3875 struct ibmvnic_tx_pool *tx_pool; 3876 struct ibmvnic_tx_buff *txbuff; 3877 struct netdev_queue *txq; 3878 union sub_crq *next; 3879 int index; 3880 int i; 3881 3882 restart_loop: 3883 while (pending_scrq(adapter, scrq)) { 3884 unsigned int pool = scrq->pool_index; 3885 int num_entries = 0; 3886 int total_bytes = 0; 3887 int num_packets = 0; 3888 3889 next = ibmvnic_next_scrq(adapter, scrq); 3890 for (i = 0; i < next->tx_comp.num_comps; i++) { 3891 index = be32_to_cpu(next->tx_comp.correlators[i]); 3892 if (index & IBMVNIC_TSO_POOL_MASK) { 3893 tx_pool = &adapter->tso_pool[pool]; 3894 index &= ~IBMVNIC_TSO_POOL_MASK; 3895 } else { 3896 tx_pool = &adapter->tx_pool[pool]; 3897 } 3898 3899 txbuff = &tx_pool->tx_buff[index]; 3900 num_packets++; 3901 num_entries += txbuff->num_entries; 3902 if (txbuff->skb) { 3903 total_bytes += txbuff->skb->len; 3904 if (next->tx_comp.rcs[i]) { 3905 dev_err(dev, "tx error %x\n", 3906 next->tx_comp.rcs[i]); 3907 dev_kfree_skb_irq(txbuff->skb); 3908 } else { 3909 dev_consume_skb_irq(txbuff->skb); 3910 } 3911 txbuff->skb = NULL; 3912 } else { 3913 netdev_warn(adapter->netdev, 3914 "TX completion received with NULL socket buffer\n"); 3915 } 3916 tx_pool->free_map[tx_pool->producer_index] = index; 3917 tx_pool->producer_index = 3918 (tx_pool->producer_index + 1) % 3919 tx_pool->num_buffers; 3920 } 3921 /* remove tx_comp scrq*/ 3922 next->tx_comp.first = 0; 3923 3924 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3925 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3926 3927 if (atomic_sub_return(num_entries, &scrq->used) <= 3928 (adapter->req_tx_entries_per_subcrq / 2) && 3929 __netif_subqueue_stopped(adapter->netdev, 3930 scrq->pool_index)) { 3931 rcu_read_lock(); 3932 if (adapter->tx_queues_active) { 3933 netif_wake_subqueue(adapter->netdev, 3934 scrq->pool_index); 3935 netdev_dbg(adapter->netdev, 3936 "Started queue %d\n", 3937 scrq->pool_index); 3938 } 3939 rcu_read_unlock(); 3940 } 3941 } 3942 3943 enable_scrq_irq(adapter, scrq); 3944 3945 if (pending_scrq(adapter, scrq)) { 3946 disable_scrq_irq(adapter, scrq); 3947 goto restart_loop; 3948 } 3949 3950 return 0; 3951 } 3952 3953 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3954 { 3955 struct ibmvnic_sub_crq_queue *scrq = instance; 3956 struct ibmvnic_adapter *adapter = scrq->adapter; 3957 3958 disable_scrq_irq(adapter, scrq); 3959 ibmvnic_complete_tx(adapter, scrq); 3960 3961 return IRQ_HANDLED; 3962 } 3963 3964 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3965 { 3966 struct ibmvnic_sub_crq_queue *scrq = instance; 3967 struct ibmvnic_adapter *adapter = scrq->adapter; 3968 3969 /* When booting a kdump kernel we can hit pending interrupts 3970 * prior to completing driver initialization. 3971 */ 3972 if (unlikely(adapter->state != VNIC_OPEN)) 3973 return IRQ_NONE; 3974 3975 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3976 3977 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3978 disable_scrq_irq(adapter, scrq); 3979 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3980 } 3981 3982 return IRQ_HANDLED; 3983 } 3984 3985 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3986 { 3987 struct device *dev = &adapter->vdev->dev; 3988 struct ibmvnic_sub_crq_queue *scrq; 3989 int i = 0, j = 0; 3990 int rc = 0; 3991 3992 for (i = 0; i < adapter->req_tx_queues; i++) { 3993 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3994 i); 3995 scrq = adapter->tx_scrq[i]; 3996 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3997 3998 if (!scrq->irq) { 3999 rc = -EINVAL; 4000 dev_err(dev, "Error mapping irq\n"); 4001 goto req_tx_irq_failed; 4002 } 4003 4004 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4005 adapter->vdev->unit_address, i); 4006 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4007 0, scrq->name, scrq); 4008 4009 if (rc) { 4010 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4011 scrq->irq, rc); 4012 irq_dispose_mapping(scrq->irq); 4013 goto req_tx_irq_failed; 4014 } 4015 } 4016 4017 for (i = 0; i < adapter->req_rx_queues; i++) { 4018 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4019 i); 4020 scrq = adapter->rx_scrq[i]; 4021 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4022 if (!scrq->irq) { 4023 rc = -EINVAL; 4024 dev_err(dev, "Error mapping irq\n"); 4025 goto req_rx_irq_failed; 4026 } 4027 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4028 adapter->vdev->unit_address, i); 4029 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4030 0, scrq->name, scrq); 4031 if (rc) { 4032 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4033 scrq->irq, rc); 4034 irq_dispose_mapping(scrq->irq); 4035 goto req_rx_irq_failed; 4036 } 4037 } 4038 return rc; 4039 4040 req_rx_irq_failed: 4041 for (j = 0; j < i; j++) { 4042 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4043 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4044 } 4045 i = adapter->req_tx_queues; 4046 req_tx_irq_failed: 4047 for (j = 0; j < i; j++) { 4048 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4049 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4050 } 4051 release_sub_crqs(adapter, 1); 4052 return rc; 4053 } 4054 4055 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4056 { 4057 struct device *dev = &adapter->vdev->dev; 4058 struct ibmvnic_sub_crq_queue **allqueues; 4059 int registered_queues = 0; 4060 int total_queues; 4061 int more = 0; 4062 int i; 4063 4064 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4065 4066 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4067 if (!allqueues) 4068 return -ENOMEM; 4069 4070 for (i = 0; i < total_queues; i++) { 4071 allqueues[i] = init_sub_crq_queue(adapter); 4072 if (!allqueues[i]) { 4073 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4074 break; 4075 } 4076 registered_queues++; 4077 } 4078 4079 /* Make sure we were able to register the minimum number of queues */ 4080 if (registered_queues < 4081 adapter->min_tx_queues + adapter->min_rx_queues) { 4082 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4083 goto tx_failed; 4084 } 4085 4086 /* Distribute the failed allocated queues*/ 4087 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4088 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4089 switch (i % 3) { 4090 case 0: 4091 if (adapter->req_rx_queues > adapter->min_rx_queues) 4092 adapter->req_rx_queues--; 4093 else 4094 more++; 4095 break; 4096 case 1: 4097 if (adapter->req_tx_queues > adapter->min_tx_queues) 4098 adapter->req_tx_queues--; 4099 else 4100 more++; 4101 break; 4102 } 4103 } 4104 4105 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4106 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4107 if (!adapter->tx_scrq) 4108 goto tx_failed; 4109 4110 for (i = 0; i < adapter->req_tx_queues; i++) { 4111 adapter->tx_scrq[i] = allqueues[i]; 4112 adapter->tx_scrq[i]->pool_index = i; 4113 adapter->num_active_tx_scrqs++; 4114 } 4115 4116 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4117 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4118 if (!adapter->rx_scrq) 4119 goto rx_failed; 4120 4121 for (i = 0; i < adapter->req_rx_queues; i++) { 4122 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4123 adapter->rx_scrq[i]->scrq_num = i; 4124 adapter->num_active_rx_scrqs++; 4125 } 4126 4127 kfree(allqueues); 4128 return 0; 4129 4130 rx_failed: 4131 kfree(adapter->tx_scrq); 4132 adapter->tx_scrq = NULL; 4133 tx_failed: 4134 for (i = 0; i < registered_queues; i++) 4135 release_sub_crq_queue(adapter, allqueues[i], 1); 4136 kfree(allqueues); 4137 return -ENOMEM; 4138 } 4139 4140 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4141 { 4142 struct device *dev = &adapter->vdev->dev; 4143 union ibmvnic_crq crq; 4144 int max_entries; 4145 int cap_reqs; 4146 4147 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4148 * the PROMISC flag). Initialize this count upfront. When the tasklet 4149 * receives a response to all of these, it will send the next protocol 4150 * message (QUERY_IP_OFFLOAD). 4151 */ 4152 if (!(adapter->netdev->flags & IFF_PROMISC) || 4153 adapter->promisc_supported) 4154 cap_reqs = 7; 4155 else 4156 cap_reqs = 6; 4157 4158 if (!retry) { 4159 /* Sub-CRQ entries are 32 byte long */ 4160 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4161 4162 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4163 4164 if (adapter->min_tx_entries_per_subcrq > entries_page || 4165 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4166 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4167 return; 4168 } 4169 4170 if (adapter->desired.mtu) 4171 adapter->req_mtu = adapter->desired.mtu; 4172 else 4173 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4174 4175 if (!adapter->desired.tx_entries) 4176 adapter->desired.tx_entries = 4177 adapter->max_tx_entries_per_subcrq; 4178 if (!adapter->desired.rx_entries) 4179 adapter->desired.rx_entries = 4180 adapter->max_rx_add_entries_per_subcrq; 4181 4182 max_entries = IBMVNIC_LTB_SET_SIZE / 4183 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4184 4185 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4186 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4187 adapter->desired.tx_entries = max_entries; 4188 } 4189 4190 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4191 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4192 adapter->desired.rx_entries = max_entries; 4193 } 4194 4195 if (adapter->desired.tx_entries) 4196 adapter->req_tx_entries_per_subcrq = 4197 adapter->desired.tx_entries; 4198 else 4199 adapter->req_tx_entries_per_subcrq = 4200 adapter->max_tx_entries_per_subcrq; 4201 4202 if (adapter->desired.rx_entries) 4203 adapter->req_rx_add_entries_per_subcrq = 4204 adapter->desired.rx_entries; 4205 else 4206 adapter->req_rx_add_entries_per_subcrq = 4207 adapter->max_rx_add_entries_per_subcrq; 4208 4209 if (adapter->desired.tx_queues) 4210 adapter->req_tx_queues = 4211 adapter->desired.tx_queues; 4212 else 4213 adapter->req_tx_queues = 4214 adapter->opt_tx_comp_sub_queues; 4215 4216 if (adapter->desired.rx_queues) 4217 adapter->req_rx_queues = 4218 adapter->desired.rx_queues; 4219 else 4220 adapter->req_rx_queues = 4221 adapter->opt_rx_comp_queues; 4222 4223 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4224 } else { 4225 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4226 } 4227 memset(&crq, 0, sizeof(crq)); 4228 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4229 crq.request_capability.cmd = REQUEST_CAPABILITY; 4230 4231 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4232 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4233 cap_reqs--; 4234 ibmvnic_send_crq(adapter, &crq); 4235 4236 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4237 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4238 cap_reqs--; 4239 ibmvnic_send_crq(adapter, &crq); 4240 4241 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4242 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4243 cap_reqs--; 4244 ibmvnic_send_crq(adapter, &crq); 4245 4246 crq.request_capability.capability = 4247 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4248 crq.request_capability.number = 4249 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4250 cap_reqs--; 4251 ibmvnic_send_crq(adapter, &crq); 4252 4253 crq.request_capability.capability = 4254 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4255 crq.request_capability.number = 4256 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4257 cap_reqs--; 4258 ibmvnic_send_crq(adapter, &crq); 4259 4260 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4261 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4262 cap_reqs--; 4263 ibmvnic_send_crq(adapter, &crq); 4264 4265 if (adapter->netdev->flags & IFF_PROMISC) { 4266 if (adapter->promisc_supported) { 4267 crq.request_capability.capability = 4268 cpu_to_be16(PROMISC_REQUESTED); 4269 crq.request_capability.number = cpu_to_be64(1); 4270 cap_reqs--; 4271 ibmvnic_send_crq(adapter, &crq); 4272 } 4273 } else { 4274 crq.request_capability.capability = 4275 cpu_to_be16(PROMISC_REQUESTED); 4276 crq.request_capability.number = cpu_to_be64(0); 4277 cap_reqs--; 4278 ibmvnic_send_crq(adapter, &crq); 4279 } 4280 4281 /* Keep at end to catch any discrepancy between expected and actual 4282 * CRQs sent. 4283 */ 4284 WARN_ON(cap_reqs != 0); 4285 } 4286 4287 static int pending_scrq(struct ibmvnic_adapter *adapter, 4288 struct ibmvnic_sub_crq_queue *scrq) 4289 { 4290 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4291 int rc; 4292 4293 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4294 4295 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4296 * contents of the SCRQ descriptor 4297 */ 4298 dma_rmb(); 4299 4300 return rc; 4301 } 4302 4303 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4304 struct ibmvnic_sub_crq_queue *scrq) 4305 { 4306 union sub_crq *entry; 4307 unsigned long flags; 4308 4309 spin_lock_irqsave(&scrq->lock, flags); 4310 entry = &scrq->msgs[scrq->cur]; 4311 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4312 if (++scrq->cur == scrq->size) 4313 scrq->cur = 0; 4314 } else { 4315 entry = NULL; 4316 } 4317 spin_unlock_irqrestore(&scrq->lock, flags); 4318 4319 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4320 * contents of the SCRQ descriptor 4321 */ 4322 dma_rmb(); 4323 4324 return entry; 4325 } 4326 4327 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4328 { 4329 struct ibmvnic_crq_queue *queue = &adapter->crq; 4330 union ibmvnic_crq *crq; 4331 4332 crq = &queue->msgs[queue->cur]; 4333 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4334 if (++queue->cur == queue->size) 4335 queue->cur = 0; 4336 } else { 4337 crq = NULL; 4338 } 4339 4340 return crq; 4341 } 4342 4343 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4344 { 4345 switch (rc) { 4346 case H_PARAMETER: 4347 dev_warn_ratelimited(dev, 4348 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4349 func, rc); 4350 break; 4351 case H_CLOSED: 4352 dev_warn_ratelimited(dev, 4353 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4354 func, rc); 4355 break; 4356 default: 4357 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4358 break; 4359 } 4360 } 4361 4362 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4363 u64 remote_handle, u64 ioba, u64 num_entries) 4364 { 4365 unsigned int ua = adapter->vdev->unit_address; 4366 struct device *dev = &adapter->vdev->dev; 4367 int rc; 4368 4369 /* Make sure the hypervisor sees the complete request */ 4370 dma_wmb(); 4371 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4372 cpu_to_be64(remote_handle), 4373 ioba, num_entries); 4374 4375 if (rc) 4376 print_subcrq_error(dev, rc, __func__); 4377 4378 return rc; 4379 } 4380 4381 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4382 union ibmvnic_crq *crq) 4383 { 4384 unsigned int ua = adapter->vdev->unit_address; 4385 struct device *dev = &adapter->vdev->dev; 4386 u64 *u64_crq = (u64 *)crq; 4387 int rc; 4388 4389 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4390 (unsigned long)cpu_to_be64(u64_crq[0]), 4391 (unsigned long)cpu_to_be64(u64_crq[1])); 4392 4393 if (!adapter->crq.active && 4394 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4395 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4396 return -EINVAL; 4397 } 4398 4399 /* Make sure the hypervisor sees the complete request */ 4400 dma_wmb(); 4401 4402 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4403 cpu_to_be64(u64_crq[0]), 4404 cpu_to_be64(u64_crq[1])); 4405 4406 if (rc) { 4407 if (rc == H_CLOSED) { 4408 dev_warn(dev, "CRQ Queue closed\n"); 4409 /* do not reset, report the fail, wait for passive init from server */ 4410 } 4411 4412 dev_warn(dev, "Send error (rc=%d)\n", rc); 4413 } 4414 4415 return rc; 4416 } 4417 4418 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4419 { 4420 struct device *dev = &adapter->vdev->dev; 4421 union ibmvnic_crq crq; 4422 int retries = 100; 4423 int rc; 4424 4425 memset(&crq, 0, sizeof(crq)); 4426 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4427 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4428 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4429 4430 do { 4431 rc = ibmvnic_send_crq(adapter, &crq); 4432 if (rc != H_CLOSED) 4433 break; 4434 retries--; 4435 msleep(50); 4436 4437 } while (retries > 0); 4438 4439 if (rc) { 4440 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4441 return rc; 4442 } 4443 4444 return 0; 4445 } 4446 4447 struct vnic_login_client_data { 4448 u8 type; 4449 __be16 len; 4450 char name[]; 4451 } __packed; 4452 4453 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4454 { 4455 int len; 4456 4457 /* Calculate the amount of buffer space needed for the 4458 * vnic client data in the login buffer. There are four entries, 4459 * OS name, LPAR name, device name, and a null last entry. 4460 */ 4461 len = 4 * sizeof(struct vnic_login_client_data); 4462 len += 6; /* "Linux" plus NULL */ 4463 len += strlen(utsname()->nodename) + 1; 4464 len += strlen(adapter->netdev->name) + 1; 4465 4466 return len; 4467 } 4468 4469 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4470 struct vnic_login_client_data *vlcd) 4471 { 4472 const char *os_name = "Linux"; 4473 int len; 4474 4475 /* Type 1 - LPAR OS */ 4476 vlcd->type = 1; 4477 len = strlen(os_name) + 1; 4478 vlcd->len = cpu_to_be16(len); 4479 strscpy(vlcd->name, os_name, len); 4480 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4481 4482 /* Type 2 - LPAR name */ 4483 vlcd->type = 2; 4484 len = strlen(utsname()->nodename) + 1; 4485 vlcd->len = cpu_to_be16(len); 4486 strscpy(vlcd->name, utsname()->nodename, len); 4487 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4488 4489 /* Type 3 - device name */ 4490 vlcd->type = 3; 4491 len = strlen(adapter->netdev->name) + 1; 4492 vlcd->len = cpu_to_be16(len); 4493 strscpy(vlcd->name, adapter->netdev->name, len); 4494 } 4495 4496 static int send_login(struct ibmvnic_adapter *adapter) 4497 { 4498 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4499 struct ibmvnic_login_buffer *login_buffer; 4500 struct device *dev = &adapter->vdev->dev; 4501 struct vnic_login_client_data *vlcd; 4502 dma_addr_t rsp_buffer_token; 4503 dma_addr_t buffer_token; 4504 size_t rsp_buffer_size; 4505 union ibmvnic_crq crq; 4506 int client_data_len; 4507 size_t buffer_size; 4508 __be64 *tx_list_p; 4509 __be64 *rx_list_p; 4510 int rc; 4511 int i; 4512 4513 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4514 netdev_err(adapter->netdev, 4515 "RX or TX queues are not allocated, device login failed\n"); 4516 return -ENOMEM; 4517 } 4518 4519 release_login_buffer(adapter); 4520 release_login_rsp_buffer(adapter); 4521 4522 client_data_len = vnic_client_data_len(adapter); 4523 4524 buffer_size = 4525 sizeof(struct ibmvnic_login_buffer) + 4526 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4527 client_data_len; 4528 4529 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4530 if (!login_buffer) 4531 goto buf_alloc_failed; 4532 4533 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4534 DMA_TO_DEVICE); 4535 if (dma_mapping_error(dev, buffer_token)) { 4536 dev_err(dev, "Couldn't map login buffer\n"); 4537 goto buf_map_failed; 4538 } 4539 4540 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4541 sizeof(u64) * adapter->req_tx_queues + 4542 sizeof(u64) * adapter->req_rx_queues + 4543 sizeof(u64) * adapter->req_rx_queues + 4544 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4545 4546 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4547 if (!login_rsp_buffer) 4548 goto buf_rsp_alloc_failed; 4549 4550 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4551 rsp_buffer_size, DMA_FROM_DEVICE); 4552 if (dma_mapping_error(dev, rsp_buffer_token)) { 4553 dev_err(dev, "Couldn't map login rsp buffer\n"); 4554 goto buf_rsp_map_failed; 4555 } 4556 4557 adapter->login_buf = login_buffer; 4558 adapter->login_buf_token = buffer_token; 4559 adapter->login_buf_sz = buffer_size; 4560 adapter->login_rsp_buf = login_rsp_buffer; 4561 adapter->login_rsp_buf_token = rsp_buffer_token; 4562 adapter->login_rsp_buf_sz = rsp_buffer_size; 4563 4564 login_buffer->len = cpu_to_be32(buffer_size); 4565 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4566 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4567 login_buffer->off_txcomp_subcrqs = 4568 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4569 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4570 login_buffer->off_rxcomp_subcrqs = 4571 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4572 sizeof(u64) * adapter->req_tx_queues); 4573 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4574 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4575 4576 tx_list_p = (__be64 *)((char *)login_buffer + 4577 sizeof(struct ibmvnic_login_buffer)); 4578 rx_list_p = (__be64 *)((char *)login_buffer + 4579 sizeof(struct ibmvnic_login_buffer) + 4580 sizeof(u64) * adapter->req_tx_queues); 4581 4582 for (i = 0; i < adapter->req_tx_queues; i++) { 4583 if (adapter->tx_scrq[i]) { 4584 tx_list_p[i] = 4585 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4586 } 4587 } 4588 4589 for (i = 0; i < adapter->req_rx_queues; i++) { 4590 if (adapter->rx_scrq[i]) { 4591 rx_list_p[i] = 4592 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4593 } 4594 } 4595 4596 /* Insert vNIC login client data */ 4597 vlcd = (struct vnic_login_client_data *) 4598 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4599 login_buffer->client_data_offset = 4600 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4601 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4602 4603 vnic_add_client_data(adapter, vlcd); 4604 4605 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4606 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4607 netdev_dbg(adapter->netdev, "%016lx\n", 4608 ((unsigned long *)(adapter->login_buf))[i]); 4609 } 4610 4611 memset(&crq, 0, sizeof(crq)); 4612 crq.login.first = IBMVNIC_CRQ_CMD; 4613 crq.login.cmd = LOGIN; 4614 crq.login.ioba = cpu_to_be32(buffer_token); 4615 crq.login.len = cpu_to_be32(buffer_size); 4616 4617 adapter->login_pending = true; 4618 rc = ibmvnic_send_crq(adapter, &crq); 4619 if (rc) { 4620 adapter->login_pending = false; 4621 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4622 goto buf_rsp_map_failed; 4623 } 4624 4625 return 0; 4626 4627 buf_rsp_map_failed: 4628 kfree(login_rsp_buffer); 4629 adapter->login_rsp_buf = NULL; 4630 buf_rsp_alloc_failed: 4631 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4632 buf_map_failed: 4633 kfree(login_buffer); 4634 adapter->login_buf = NULL; 4635 buf_alloc_failed: 4636 return -ENOMEM; 4637 } 4638 4639 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4640 u32 len, u8 map_id) 4641 { 4642 union ibmvnic_crq crq; 4643 4644 memset(&crq, 0, sizeof(crq)); 4645 crq.request_map.first = IBMVNIC_CRQ_CMD; 4646 crq.request_map.cmd = REQUEST_MAP; 4647 crq.request_map.map_id = map_id; 4648 crq.request_map.ioba = cpu_to_be32(addr); 4649 crq.request_map.len = cpu_to_be32(len); 4650 return ibmvnic_send_crq(adapter, &crq); 4651 } 4652 4653 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4654 { 4655 union ibmvnic_crq crq; 4656 4657 memset(&crq, 0, sizeof(crq)); 4658 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4659 crq.request_unmap.cmd = REQUEST_UNMAP; 4660 crq.request_unmap.map_id = map_id; 4661 return ibmvnic_send_crq(adapter, &crq); 4662 } 4663 4664 static void send_query_map(struct ibmvnic_adapter *adapter) 4665 { 4666 union ibmvnic_crq crq; 4667 4668 memset(&crq, 0, sizeof(crq)); 4669 crq.query_map.first = IBMVNIC_CRQ_CMD; 4670 crq.query_map.cmd = QUERY_MAP; 4671 ibmvnic_send_crq(adapter, &crq); 4672 } 4673 4674 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4675 static void send_query_cap(struct ibmvnic_adapter *adapter) 4676 { 4677 union ibmvnic_crq crq; 4678 int cap_reqs; 4679 4680 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4681 * upfront. When the tasklet receives a response to all of these, it 4682 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4683 */ 4684 cap_reqs = 25; 4685 4686 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4687 4688 memset(&crq, 0, sizeof(crq)); 4689 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4690 crq.query_capability.cmd = QUERY_CAPABILITY; 4691 4692 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4693 ibmvnic_send_crq(adapter, &crq); 4694 cap_reqs--; 4695 4696 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4697 ibmvnic_send_crq(adapter, &crq); 4698 cap_reqs--; 4699 4700 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4701 ibmvnic_send_crq(adapter, &crq); 4702 cap_reqs--; 4703 4704 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4705 ibmvnic_send_crq(adapter, &crq); 4706 cap_reqs--; 4707 4708 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4709 ibmvnic_send_crq(adapter, &crq); 4710 cap_reqs--; 4711 4712 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4713 ibmvnic_send_crq(adapter, &crq); 4714 cap_reqs--; 4715 4716 crq.query_capability.capability = 4717 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4718 ibmvnic_send_crq(adapter, &crq); 4719 cap_reqs--; 4720 4721 crq.query_capability.capability = 4722 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4723 ibmvnic_send_crq(adapter, &crq); 4724 cap_reqs--; 4725 4726 crq.query_capability.capability = 4727 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4728 ibmvnic_send_crq(adapter, &crq); 4729 cap_reqs--; 4730 4731 crq.query_capability.capability = 4732 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4733 ibmvnic_send_crq(adapter, &crq); 4734 cap_reqs--; 4735 4736 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4737 ibmvnic_send_crq(adapter, &crq); 4738 cap_reqs--; 4739 4740 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4741 ibmvnic_send_crq(adapter, &crq); 4742 cap_reqs--; 4743 4744 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4745 ibmvnic_send_crq(adapter, &crq); 4746 cap_reqs--; 4747 4748 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4749 ibmvnic_send_crq(adapter, &crq); 4750 cap_reqs--; 4751 4752 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4753 ibmvnic_send_crq(adapter, &crq); 4754 cap_reqs--; 4755 4756 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4757 ibmvnic_send_crq(adapter, &crq); 4758 cap_reqs--; 4759 4760 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4761 ibmvnic_send_crq(adapter, &crq); 4762 cap_reqs--; 4763 4764 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4765 ibmvnic_send_crq(adapter, &crq); 4766 cap_reqs--; 4767 4768 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4769 ibmvnic_send_crq(adapter, &crq); 4770 cap_reqs--; 4771 4772 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4773 ibmvnic_send_crq(adapter, &crq); 4774 cap_reqs--; 4775 4776 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4777 ibmvnic_send_crq(adapter, &crq); 4778 cap_reqs--; 4779 4780 crq.query_capability.capability = 4781 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4782 ibmvnic_send_crq(adapter, &crq); 4783 cap_reqs--; 4784 4785 crq.query_capability.capability = 4786 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4787 ibmvnic_send_crq(adapter, &crq); 4788 cap_reqs--; 4789 4790 crq.query_capability.capability = 4791 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4792 ibmvnic_send_crq(adapter, &crq); 4793 cap_reqs--; 4794 4795 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4796 4797 ibmvnic_send_crq(adapter, &crq); 4798 cap_reqs--; 4799 4800 /* Keep at end to catch any discrepancy between expected and actual 4801 * CRQs sent. 4802 */ 4803 WARN_ON(cap_reqs != 0); 4804 } 4805 4806 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4807 { 4808 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4809 struct device *dev = &adapter->vdev->dev; 4810 union ibmvnic_crq crq; 4811 4812 adapter->ip_offload_tok = 4813 dma_map_single(dev, 4814 &adapter->ip_offload_buf, 4815 buf_sz, 4816 DMA_FROM_DEVICE); 4817 4818 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4819 if (!firmware_has_feature(FW_FEATURE_CMO)) 4820 dev_err(dev, "Couldn't map offload buffer\n"); 4821 return; 4822 } 4823 4824 memset(&crq, 0, sizeof(crq)); 4825 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4826 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4827 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4828 crq.query_ip_offload.ioba = 4829 cpu_to_be32(adapter->ip_offload_tok); 4830 4831 ibmvnic_send_crq(adapter, &crq); 4832 } 4833 4834 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4835 { 4836 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4837 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4838 struct device *dev = &adapter->vdev->dev; 4839 netdev_features_t old_hw_features = 0; 4840 union ibmvnic_crq crq; 4841 4842 adapter->ip_offload_ctrl_tok = 4843 dma_map_single(dev, 4844 ctrl_buf, 4845 sizeof(adapter->ip_offload_ctrl), 4846 DMA_TO_DEVICE); 4847 4848 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4849 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4850 return; 4851 } 4852 4853 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4854 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4855 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4856 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4857 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4858 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4859 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4860 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4861 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4862 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4863 4864 /* large_rx disabled for now, additional features needed */ 4865 ctrl_buf->large_rx_ipv4 = 0; 4866 ctrl_buf->large_rx_ipv6 = 0; 4867 4868 if (adapter->state != VNIC_PROBING) { 4869 old_hw_features = adapter->netdev->hw_features; 4870 adapter->netdev->hw_features = 0; 4871 } 4872 4873 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4874 4875 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4876 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4877 4878 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4879 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4880 4881 if ((adapter->netdev->features & 4882 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4883 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4884 4885 if (buf->large_tx_ipv4) 4886 adapter->netdev->hw_features |= NETIF_F_TSO; 4887 if (buf->large_tx_ipv6) 4888 adapter->netdev->hw_features |= NETIF_F_TSO6; 4889 4890 if (adapter->state == VNIC_PROBING) { 4891 adapter->netdev->features |= adapter->netdev->hw_features; 4892 } else if (old_hw_features != adapter->netdev->hw_features) { 4893 netdev_features_t tmp = 0; 4894 4895 /* disable features no longer supported */ 4896 adapter->netdev->features &= adapter->netdev->hw_features; 4897 /* turn on features now supported if previously enabled */ 4898 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4899 adapter->netdev->hw_features; 4900 adapter->netdev->features |= 4901 tmp & adapter->netdev->wanted_features; 4902 } 4903 4904 memset(&crq, 0, sizeof(crq)); 4905 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4906 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4907 crq.control_ip_offload.len = 4908 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4909 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4910 ibmvnic_send_crq(adapter, &crq); 4911 } 4912 4913 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4914 struct ibmvnic_adapter *adapter) 4915 { 4916 struct device *dev = &adapter->vdev->dev; 4917 4918 if (crq->get_vpd_size_rsp.rc.code) { 4919 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4920 crq->get_vpd_size_rsp.rc.code); 4921 complete(&adapter->fw_done); 4922 return; 4923 } 4924 4925 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4926 complete(&adapter->fw_done); 4927 } 4928 4929 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4930 struct ibmvnic_adapter *adapter) 4931 { 4932 struct device *dev = &adapter->vdev->dev; 4933 unsigned char *substr = NULL; 4934 u8 fw_level_len = 0; 4935 4936 memset(adapter->fw_version, 0, 32); 4937 4938 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4939 DMA_FROM_DEVICE); 4940 4941 if (crq->get_vpd_rsp.rc.code) { 4942 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4943 crq->get_vpd_rsp.rc.code); 4944 goto complete; 4945 } 4946 4947 /* get the position of the firmware version info 4948 * located after the ASCII 'RM' substring in the buffer 4949 */ 4950 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4951 if (!substr) { 4952 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4953 goto complete; 4954 } 4955 4956 /* get length of firmware level ASCII substring */ 4957 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4958 fw_level_len = *(substr + 2); 4959 } else { 4960 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4961 goto complete; 4962 } 4963 4964 /* copy firmware version string from vpd into adapter */ 4965 if ((substr + 3 + fw_level_len) < 4966 (adapter->vpd->buff + adapter->vpd->len)) { 4967 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4968 } else { 4969 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4970 } 4971 4972 complete: 4973 if (adapter->fw_version[0] == '\0') 4974 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4975 complete(&adapter->fw_done); 4976 } 4977 4978 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4979 { 4980 struct device *dev = &adapter->vdev->dev; 4981 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4982 int i; 4983 4984 dma_unmap_single(dev, adapter->ip_offload_tok, 4985 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4986 4987 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4988 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4989 netdev_dbg(adapter->netdev, "%016lx\n", 4990 ((unsigned long *)(buf))[i]); 4991 4992 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4993 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4994 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4995 buf->tcp_ipv4_chksum); 4996 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4997 buf->tcp_ipv6_chksum); 4998 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4999 buf->udp_ipv4_chksum); 5000 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5001 buf->udp_ipv6_chksum); 5002 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5003 buf->large_tx_ipv4); 5004 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5005 buf->large_tx_ipv6); 5006 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5007 buf->large_rx_ipv4); 5008 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5009 buf->large_rx_ipv6); 5010 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5011 buf->max_ipv4_header_size); 5012 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5013 buf->max_ipv6_header_size); 5014 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5015 buf->max_tcp_header_size); 5016 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5017 buf->max_udp_header_size); 5018 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5019 buf->max_large_tx_size); 5020 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5021 buf->max_large_rx_size); 5022 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5023 buf->ipv6_extension_header); 5024 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5025 buf->tcp_pseudosum_req); 5026 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5027 buf->num_ipv6_ext_headers); 5028 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5029 buf->off_ipv6_ext_headers); 5030 5031 send_control_ip_offload(adapter); 5032 } 5033 5034 static const char *ibmvnic_fw_err_cause(u16 cause) 5035 { 5036 switch (cause) { 5037 case ADAPTER_PROBLEM: 5038 return "adapter problem"; 5039 case BUS_PROBLEM: 5040 return "bus problem"; 5041 case FW_PROBLEM: 5042 return "firmware problem"; 5043 case DD_PROBLEM: 5044 return "device driver problem"; 5045 case EEH_RECOVERY: 5046 return "EEH recovery"; 5047 case FW_UPDATED: 5048 return "firmware updated"; 5049 case LOW_MEMORY: 5050 return "low Memory"; 5051 default: 5052 return "unknown"; 5053 } 5054 } 5055 5056 static void handle_error_indication(union ibmvnic_crq *crq, 5057 struct ibmvnic_adapter *adapter) 5058 { 5059 struct device *dev = &adapter->vdev->dev; 5060 u16 cause; 5061 5062 cause = be16_to_cpu(crq->error_indication.error_cause); 5063 5064 dev_warn_ratelimited(dev, 5065 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5066 crq->error_indication.flags 5067 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5068 ibmvnic_fw_err_cause(cause)); 5069 5070 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5071 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5072 else 5073 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5074 } 5075 5076 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5077 struct ibmvnic_adapter *adapter) 5078 { 5079 struct net_device *netdev = adapter->netdev; 5080 struct device *dev = &adapter->vdev->dev; 5081 long rc; 5082 5083 rc = crq->change_mac_addr_rsp.rc.code; 5084 if (rc) { 5085 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5086 goto out; 5087 } 5088 /* crq->change_mac_addr.mac_addr is the requested one 5089 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5090 */ 5091 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5092 ether_addr_copy(adapter->mac_addr, 5093 &crq->change_mac_addr_rsp.mac_addr[0]); 5094 out: 5095 complete(&adapter->fw_done); 5096 return rc; 5097 } 5098 5099 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5100 struct ibmvnic_adapter *adapter) 5101 { 5102 struct device *dev = &adapter->vdev->dev; 5103 u64 *req_value; 5104 char *name; 5105 5106 atomic_dec(&adapter->running_cap_crqs); 5107 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5108 atomic_read(&adapter->running_cap_crqs)); 5109 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5110 case REQ_TX_QUEUES: 5111 req_value = &adapter->req_tx_queues; 5112 name = "tx"; 5113 break; 5114 case REQ_RX_QUEUES: 5115 req_value = &adapter->req_rx_queues; 5116 name = "rx"; 5117 break; 5118 case REQ_RX_ADD_QUEUES: 5119 req_value = &adapter->req_rx_add_queues; 5120 name = "rx_add"; 5121 break; 5122 case REQ_TX_ENTRIES_PER_SUBCRQ: 5123 req_value = &adapter->req_tx_entries_per_subcrq; 5124 name = "tx_entries_per_subcrq"; 5125 break; 5126 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5127 req_value = &adapter->req_rx_add_entries_per_subcrq; 5128 name = "rx_add_entries_per_subcrq"; 5129 break; 5130 case REQ_MTU: 5131 req_value = &adapter->req_mtu; 5132 name = "mtu"; 5133 break; 5134 case PROMISC_REQUESTED: 5135 req_value = &adapter->promisc; 5136 name = "promisc"; 5137 break; 5138 default: 5139 dev_err(dev, "Got invalid cap request rsp %d\n", 5140 crq->request_capability.capability); 5141 return; 5142 } 5143 5144 switch (crq->request_capability_rsp.rc.code) { 5145 case SUCCESS: 5146 break; 5147 case PARTIALSUCCESS: 5148 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5149 *req_value, 5150 (long)be64_to_cpu(crq->request_capability_rsp.number), 5151 name); 5152 5153 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5154 REQ_MTU) { 5155 pr_err("mtu of %llu is not supported. Reverting.\n", 5156 *req_value); 5157 *req_value = adapter->fallback.mtu; 5158 } else { 5159 *req_value = 5160 be64_to_cpu(crq->request_capability_rsp.number); 5161 } 5162 5163 send_request_cap(adapter, 1); 5164 return; 5165 default: 5166 dev_err(dev, "Error %d in request cap rsp\n", 5167 crq->request_capability_rsp.rc.code); 5168 return; 5169 } 5170 5171 /* Done receiving requested capabilities, query IP offload support */ 5172 if (atomic_read(&adapter->running_cap_crqs) == 0) 5173 send_query_ip_offload(adapter); 5174 } 5175 5176 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5177 struct ibmvnic_adapter *adapter) 5178 { 5179 struct device *dev = &adapter->vdev->dev; 5180 struct net_device *netdev = adapter->netdev; 5181 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5182 struct ibmvnic_login_buffer *login = adapter->login_buf; 5183 u64 *tx_handle_array; 5184 u64 *rx_handle_array; 5185 int num_tx_pools; 5186 int num_rx_pools; 5187 u64 *size_array; 5188 int i; 5189 5190 /* CHECK: Test/set of login_pending does not need to be atomic 5191 * because only ibmvnic_tasklet tests/clears this. 5192 */ 5193 if (!adapter->login_pending) { 5194 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5195 return 0; 5196 } 5197 adapter->login_pending = false; 5198 5199 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 5200 DMA_TO_DEVICE); 5201 dma_unmap_single(dev, adapter->login_rsp_buf_token, 5202 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 5203 5204 /* If the number of queues requested can't be allocated by the 5205 * server, the login response will return with code 1. We will need 5206 * to resend the login buffer with fewer queues requested. 5207 */ 5208 if (login_rsp_crq->generic.rc.code) { 5209 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5210 complete(&adapter->init_done); 5211 return 0; 5212 } 5213 5214 if (adapter->failover_pending) { 5215 adapter->init_done_rc = -EAGAIN; 5216 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5217 complete(&adapter->init_done); 5218 /* login response buffer will be released on reset */ 5219 return 0; 5220 } 5221 5222 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5223 5224 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5225 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5226 netdev_dbg(adapter->netdev, "%016lx\n", 5227 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5228 } 5229 5230 /* Sanity checks */ 5231 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5232 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5233 adapter->req_rx_add_queues != 5234 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5235 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5236 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5237 return -EIO; 5238 } 5239 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5240 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5241 /* variable buffer sizes are not supported, so just read the 5242 * first entry. 5243 */ 5244 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5245 5246 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5247 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5248 5249 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5250 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5251 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5252 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5253 5254 for (i = 0; i < num_tx_pools; i++) 5255 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5256 5257 for (i = 0; i < num_rx_pools; i++) 5258 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5259 5260 adapter->num_active_tx_scrqs = num_tx_pools; 5261 adapter->num_active_rx_scrqs = num_rx_pools; 5262 release_login_rsp_buffer(adapter); 5263 release_login_buffer(adapter); 5264 complete(&adapter->init_done); 5265 5266 return 0; 5267 } 5268 5269 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5270 struct ibmvnic_adapter *adapter) 5271 { 5272 struct device *dev = &adapter->vdev->dev; 5273 long rc; 5274 5275 rc = crq->request_unmap_rsp.rc.code; 5276 if (rc) 5277 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5278 } 5279 5280 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5281 struct ibmvnic_adapter *adapter) 5282 { 5283 struct net_device *netdev = adapter->netdev; 5284 struct device *dev = &adapter->vdev->dev; 5285 long rc; 5286 5287 rc = crq->query_map_rsp.rc.code; 5288 if (rc) { 5289 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5290 return; 5291 } 5292 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5293 crq->query_map_rsp.page_size, 5294 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5295 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5296 } 5297 5298 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5299 struct ibmvnic_adapter *adapter) 5300 { 5301 struct net_device *netdev = adapter->netdev; 5302 struct device *dev = &adapter->vdev->dev; 5303 long rc; 5304 5305 atomic_dec(&adapter->running_cap_crqs); 5306 netdev_dbg(netdev, "Outstanding queries: %d\n", 5307 atomic_read(&adapter->running_cap_crqs)); 5308 rc = crq->query_capability.rc.code; 5309 if (rc) { 5310 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5311 goto out; 5312 } 5313 5314 switch (be16_to_cpu(crq->query_capability.capability)) { 5315 case MIN_TX_QUEUES: 5316 adapter->min_tx_queues = 5317 be64_to_cpu(crq->query_capability.number); 5318 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5319 adapter->min_tx_queues); 5320 break; 5321 case MIN_RX_QUEUES: 5322 adapter->min_rx_queues = 5323 be64_to_cpu(crq->query_capability.number); 5324 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5325 adapter->min_rx_queues); 5326 break; 5327 case MIN_RX_ADD_QUEUES: 5328 adapter->min_rx_add_queues = 5329 be64_to_cpu(crq->query_capability.number); 5330 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5331 adapter->min_rx_add_queues); 5332 break; 5333 case MAX_TX_QUEUES: 5334 adapter->max_tx_queues = 5335 be64_to_cpu(crq->query_capability.number); 5336 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5337 adapter->max_tx_queues); 5338 break; 5339 case MAX_RX_QUEUES: 5340 adapter->max_rx_queues = 5341 be64_to_cpu(crq->query_capability.number); 5342 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5343 adapter->max_rx_queues); 5344 break; 5345 case MAX_RX_ADD_QUEUES: 5346 adapter->max_rx_add_queues = 5347 be64_to_cpu(crq->query_capability.number); 5348 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5349 adapter->max_rx_add_queues); 5350 break; 5351 case MIN_TX_ENTRIES_PER_SUBCRQ: 5352 adapter->min_tx_entries_per_subcrq = 5353 be64_to_cpu(crq->query_capability.number); 5354 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5355 adapter->min_tx_entries_per_subcrq); 5356 break; 5357 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5358 adapter->min_rx_add_entries_per_subcrq = 5359 be64_to_cpu(crq->query_capability.number); 5360 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5361 adapter->min_rx_add_entries_per_subcrq); 5362 break; 5363 case MAX_TX_ENTRIES_PER_SUBCRQ: 5364 adapter->max_tx_entries_per_subcrq = 5365 be64_to_cpu(crq->query_capability.number); 5366 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5367 adapter->max_tx_entries_per_subcrq); 5368 break; 5369 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5370 adapter->max_rx_add_entries_per_subcrq = 5371 be64_to_cpu(crq->query_capability.number); 5372 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5373 adapter->max_rx_add_entries_per_subcrq); 5374 break; 5375 case TCP_IP_OFFLOAD: 5376 adapter->tcp_ip_offload = 5377 be64_to_cpu(crq->query_capability.number); 5378 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5379 adapter->tcp_ip_offload); 5380 break; 5381 case PROMISC_SUPPORTED: 5382 adapter->promisc_supported = 5383 be64_to_cpu(crq->query_capability.number); 5384 netdev_dbg(netdev, "promisc_supported = %lld\n", 5385 adapter->promisc_supported); 5386 break; 5387 case MIN_MTU: 5388 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5389 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5390 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5391 break; 5392 case MAX_MTU: 5393 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5394 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5395 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5396 break; 5397 case MAX_MULTICAST_FILTERS: 5398 adapter->max_multicast_filters = 5399 be64_to_cpu(crq->query_capability.number); 5400 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5401 adapter->max_multicast_filters); 5402 break; 5403 case VLAN_HEADER_INSERTION: 5404 adapter->vlan_header_insertion = 5405 be64_to_cpu(crq->query_capability.number); 5406 if (adapter->vlan_header_insertion) 5407 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5408 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5409 adapter->vlan_header_insertion); 5410 break; 5411 case RX_VLAN_HEADER_INSERTION: 5412 adapter->rx_vlan_header_insertion = 5413 be64_to_cpu(crq->query_capability.number); 5414 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5415 adapter->rx_vlan_header_insertion); 5416 break; 5417 case MAX_TX_SG_ENTRIES: 5418 adapter->max_tx_sg_entries = 5419 be64_to_cpu(crq->query_capability.number); 5420 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5421 adapter->max_tx_sg_entries); 5422 break; 5423 case RX_SG_SUPPORTED: 5424 adapter->rx_sg_supported = 5425 be64_to_cpu(crq->query_capability.number); 5426 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5427 adapter->rx_sg_supported); 5428 break; 5429 case OPT_TX_COMP_SUB_QUEUES: 5430 adapter->opt_tx_comp_sub_queues = 5431 be64_to_cpu(crq->query_capability.number); 5432 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5433 adapter->opt_tx_comp_sub_queues); 5434 break; 5435 case OPT_RX_COMP_QUEUES: 5436 adapter->opt_rx_comp_queues = 5437 be64_to_cpu(crq->query_capability.number); 5438 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5439 adapter->opt_rx_comp_queues); 5440 break; 5441 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5442 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5443 be64_to_cpu(crq->query_capability.number); 5444 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5445 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5446 break; 5447 case OPT_TX_ENTRIES_PER_SUBCRQ: 5448 adapter->opt_tx_entries_per_subcrq = 5449 be64_to_cpu(crq->query_capability.number); 5450 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5451 adapter->opt_tx_entries_per_subcrq); 5452 break; 5453 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5454 adapter->opt_rxba_entries_per_subcrq = 5455 be64_to_cpu(crq->query_capability.number); 5456 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5457 adapter->opt_rxba_entries_per_subcrq); 5458 break; 5459 case TX_RX_DESC_REQ: 5460 adapter->tx_rx_desc_req = crq->query_capability.number; 5461 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5462 adapter->tx_rx_desc_req); 5463 break; 5464 5465 default: 5466 netdev_err(netdev, "Got invalid cap rsp %d\n", 5467 crq->query_capability.capability); 5468 } 5469 5470 out: 5471 if (atomic_read(&adapter->running_cap_crqs) == 0) 5472 send_request_cap(adapter, 0); 5473 } 5474 5475 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5476 { 5477 union ibmvnic_crq crq; 5478 int rc; 5479 5480 memset(&crq, 0, sizeof(crq)); 5481 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5482 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5483 5484 mutex_lock(&adapter->fw_lock); 5485 adapter->fw_done_rc = 0; 5486 reinit_completion(&adapter->fw_done); 5487 5488 rc = ibmvnic_send_crq(adapter, &crq); 5489 if (rc) { 5490 mutex_unlock(&adapter->fw_lock); 5491 return rc; 5492 } 5493 5494 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5495 if (rc) { 5496 mutex_unlock(&adapter->fw_lock); 5497 return rc; 5498 } 5499 5500 mutex_unlock(&adapter->fw_lock); 5501 return adapter->fw_done_rc ? -EIO : 0; 5502 } 5503 5504 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5505 struct ibmvnic_adapter *adapter) 5506 { 5507 struct net_device *netdev = adapter->netdev; 5508 int rc; 5509 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5510 5511 rc = crq->query_phys_parms_rsp.rc.code; 5512 if (rc) { 5513 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5514 return rc; 5515 } 5516 switch (rspeed) { 5517 case IBMVNIC_10MBPS: 5518 adapter->speed = SPEED_10; 5519 break; 5520 case IBMVNIC_100MBPS: 5521 adapter->speed = SPEED_100; 5522 break; 5523 case IBMVNIC_1GBPS: 5524 adapter->speed = SPEED_1000; 5525 break; 5526 case IBMVNIC_10GBPS: 5527 adapter->speed = SPEED_10000; 5528 break; 5529 case IBMVNIC_25GBPS: 5530 adapter->speed = SPEED_25000; 5531 break; 5532 case IBMVNIC_40GBPS: 5533 adapter->speed = SPEED_40000; 5534 break; 5535 case IBMVNIC_50GBPS: 5536 adapter->speed = SPEED_50000; 5537 break; 5538 case IBMVNIC_100GBPS: 5539 adapter->speed = SPEED_100000; 5540 break; 5541 case IBMVNIC_200GBPS: 5542 adapter->speed = SPEED_200000; 5543 break; 5544 default: 5545 if (netif_carrier_ok(netdev)) 5546 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5547 adapter->speed = SPEED_UNKNOWN; 5548 } 5549 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5550 adapter->duplex = DUPLEX_FULL; 5551 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5552 adapter->duplex = DUPLEX_HALF; 5553 else 5554 adapter->duplex = DUPLEX_UNKNOWN; 5555 5556 return rc; 5557 } 5558 5559 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5560 struct ibmvnic_adapter *adapter) 5561 { 5562 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5563 struct net_device *netdev = adapter->netdev; 5564 struct device *dev = &adapter->vdev->dev; 5565 u64 *u64_crq = (u64 *)crq; 5566 long rc; 5567 5568 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5569 (unsigned long)cpu_to_be64(u64_crq[0]), 5570 (unsigned long)cpu_to_be64(u64_crq[1])); 5571 switch (gen_crq->first) { 5572 case IBMVNIC_CRQ_INIT_RSP: 5573 switch (gen_crq->cmd) { 5574 case IBMVNIC_CRQ_INIT: 5575 dev_info(dev, "Partner initialized\n"); 5576 adapter->from_passive_init = true; 5577 /* Discard any stale login responses from prev reset. 5578 * CHECK: should we clear even on INIT_COMPLETE? 5579 */ 5580 adapter->login_pending = false; 5581 5582 if (adapter->state == VNIC_DOWN) 5583 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5584 else 5585 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5586 5587 if (rc && rc != -EBUSY) { 5588 /* We were unable to schedule the failover 5589 * reset either because the adapter was still 5590 * probing (eg: during kexec) or we could not 5591 * allocate memory. Clear the failover_pending 5592 * flag since no one else will. We ignore 5593 * EBUSY because it means either FAILOVER reset 5594 * is already scheduled or the adapter is 5595 * being removed. 5596 */ 5597 netdev_err(netdev, 5598 "Error %ld scheduling failover reset\n", 5599 rc); 5600 adapter->failover_pending = false; 5601 } 5602 5603 if (!completion_done(&adapter->init_done)) { 5604 if (!adapter->init_done_rc) 5605 adapter->init_done_rc = -EAGAIN; 5606 complete(&adapter->init_done); 5607 } 5608 5609 break; 5610 case IBMVNIC_CRQ_INIT_COMPLETE: 5611 dev_info(dev, "Partner initialization complete\n"); 5612 adapter->crq.active = true; 5613 send_version_xchg(adapter); 5614 break; 5615 default: 5616 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5617 } 5618 return; 5619 case IBMVNIC_CRQ_XPORT_EVENT: 5620 netif_carrier_off(netdev); 5621 adapter->crq.active = false; 5622 /* terminate any thread waiting for a response 5623 * from the device 5624 */ 5625 if (!completion_done(&adapter->fw_done)) { 5626 adapter->fw_done_rc = -EIO; 5627 complete(&adapter->fw_done); 5628 } 5629 5630 /* if we got here during crq-init, retry crq-init */ 5631 if (!completion_done(&adapter->init_done)) { 5632 adapter->init_done_rc = -EAGAIN; 5633 complete(&adapter->init_done); 5634 } 5635 5636 if (!completion_done(&adapter->stats_done)) 5637 complete(&adapter->stats_done); 5638 if (test_bit(0, &adapter->resetting)) 5639 adapter->force_reset_recovery = true; 5640 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5641 dev_info(dev, "Migrated, re-enabling adapter\n"); 5642 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5643 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5644 dev_info(dev, "Backing device failover detected\n"); 5645 adapter->failover_pending = true; 5646 } else { 5647 /* The adapter lost the connection */ 5648 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5649 gen_crq->cmd); 5650 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5651 } 5652 return; 5653 case IBMVNIC_CRQ_CMD_RSP: 5654 break; 5655 default: 5656 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5657 gen_crq->first); 5658 return; 5659 } 5660 5661 switch (gen_crq->cmd) { 5662 case VERSION_EXCHANGE_RSP: 5663 rc = crq->version_exchange_rsp.rc.code; 5664 if (rc) { 5665 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5666 break; 5667 } 5668 ibmvnic_version = 5669 be16_to_cpu(crq->version_exchange_rsp.version); 5670 dev_info(dev, "Partner protocol version is %d\n", 5671 ibmvnic_version); 5672 send_query_cap(adapter); 5673 break; 5674 case QUERY_CAPABILITY_RSP: 5675 handle_query_cap_rsp(crq, adapter); 5676 break; 5677 case QUERY_MAP_RSP: 5678 handle_query_map_rsp(crq, adapter); 5679 break; 5680 case REQUEST_MAP_RSP: 5681 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5682 complete(&adapter->fw_done); 5683 break; 5684 case REQUEST_UNMAP_RSP: 5685 handle_request_unmap_rsp(crq, adapter); 5686 break; 5687 case REQUEST_CAPABILITY_RSP: 5688 handle_request_cap_rsp(crq, adapter); 5689 break; 5690 case LOGIN_RSP: 5691 netdev_dbg(netdev, "Got Login Response\n"); 5692 handle_login_rsp(crq, adapter); 5693 break; 5694 case LOGICAL_LINK_STATE_RSP: 5695 netdev_dbg(netdev, 5696 "Got Logical Link State Response, state: %d rc: %d\n", 5697 crq->logical_link_state_rsp.link_state, 5698 crq->logical_link_state_rsp.rc.code); 5699 adapter->logical_link_state = 5700 crq->logical_link_state_rsp.link_state; 5701 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5702 complete(&adapter->init_done); 5703 break; 5704 case LINK_STATE_INDICATION: 5705 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5706 adapter->phys_link_state = 5707 crq->link_state_indication.phys_link_state; 5708 adapter->logical_link_state = 5709 crq->link_state_indication.logical_link_state; 5710 if (adapter->phys_link_state && adapter->logical_link_state) 5711 netif_carrier_on(netdev); 5712 else 5713 netif_carrier_off(netdev); 5714 break; 5715 case CHANGE_MAC_ADDR_RSP: 5716 netdev_dbg(netdev, "Got MAC address change Response\n"); 5717 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5718 break; 5719 case ERROR_INDICATION: 5720 netdev_dbg(netdev, "Got Error Indication\n"); 5721 handle_error_indication(crq, adapter); 5722 break; 5723 case REQUEST_STATISTICS_RSP: 5724 netdev_dbg(netdev, "Got Statistics Response\n"); 5725 complete(&adapter->stats_done); 5726 break; 5727 case QUERY_IP_OFFLOAD_RSP: 5728 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5729 handle_query_ip_offload_rsp(adapter); 5730 break; 5731 case MULTICAST_CTRL_RSP: 5732 netdev_dbg(netdev, "Got multicast control Response\n"); 5733 break; 5734 case CONTROL_IP_OFFLOAD_RSP: 5735 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5736 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5737 sizeof(adapter->ip_offload_ctrl), 5738 DMA_TO_DEVICE); 5739 complete(&adapter->init_done); 5740 break; 5741 case COLLECT_FW_TRACE_RSP: 5742 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5743 complete(&adapter->fw_done); 5744 break; 5745 case GET_VPD_SIZE_RSP: 5746 handle_vpd_size_rsp(crq, adapter); 5747 break; 5748 case GET_VPD_RSP: 5749 handle_vpd_rsp(crq, adapter); 5750 break; 5751 case QUERY_PHYS_PARMS_RSP: 5752 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5753 complete(&adapter->fw_done); 5754 break; 5755 default: 5756 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5757 gen_crq->cmd); 5758 } 5759 } 5760 5761 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5762 { 5763 struct ibmvnic_adapter *adapter = instance; 5764 5765 tasklet_schedule(&adapter->tasklet); 5766 return IRQ_HANDLED; 5767 } 5768 5769 static void ibmvnic_tasklet(struct tasklet_struct *t) 5770 { 5771 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5772 struct ibmvnic_crq_queue *queue = &adapter->crq; 5773 union ibmvnic_crq *crq; 5774 unsigned long flags; 5775 5776 spin_lock_irqsave(&queue->lock, flags); 5777 5778 /* Pull all the valid messages off the CRQ */ 5779 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5780 /* This barrier makes sure ibmvnic_next_crq()'s 5781 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5782 * before ibmvnic_handle_crq()'s 5783 * switch(gen_crq->first) and switch(gen_crq->cmd). 5784 */ 5785 dma_rmb(); 5786 ibmvnic_handle_crq(crq, adapter); 5787 crq->generic.first = 0; 5788 } 5789 5790 spin_unlock_irqrestore(&queue->lock, flags); 5791 } 5792 5793 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5794 { 5795 struct vio_dev *vdev = adapter->vdev; 5796 int rc; 5797 5798 do { 5799 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5800 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5801 5802 if (rc) 5803 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5804 5805 return rc; 5806 } 5807 5808 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5809 { 5810 struct ibmvnic_crq_queue *crq = &adapter->crq; 5811 struct device *dev = &adapter->vdev->dev; 5812 struct vio_dev *vdev = adapter->vdev; 5813 int rc; 5814 5815 /* Close the CRQ */ 5816 do { 5817 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5818 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5819 5820 /* Clean out the queue */ 5821 if (!crq->msgs) 5822 return -EINVAL; 5823 5824 memset(crq->msgs, 0, PAGE_SIZE); 5825 crq->cur = 0; 5826 crq->active = false; 5827 5828 /* And re-open it again */ 5829 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5830 crq->msg_token, PAGE_SIZE); 5831 5832 if (rc == H_CLOSED) 5833 /* Adapter is good, but other end is not ready */ 5834 dev_warn(dev, "Partner adapter not ready\n"); 5835 else if (rc != 0) 5836 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5837 5838 return rc; 5839 } 5840 5841 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5842 { 5843 struct ibmvnic_crq_queue *crq = &adapter->crq; 5844 struct vio_dev *vdev = adapter->vdev; 5845 long rc; 5846 5847 if (!crq->msgs) 5848 return; 5849 5850 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5851 free_irq(vdev->irq, adapter); 5852 tasklet_kill(&adapter->tasklet); 5853 do { 5854 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5855 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5856 5857 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5858 DMA_BIDIRECTIONAL); 5859 free_page((unsigned long)crq->msgs); 5860 crq->msgs = NULL; 5861 crq->active = false; 5862 } 5863 5864 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5865 { 5866 struct ibmvnic_crq_queue *crq = &adapter->crq; 5867 struct device *dev = &adapter->vdev->dev; 5868 struct vio_dev *vdev = adapter->vdev; 5869 int rc, retrc = -ENOMEM; 5870 5871 if (crq->msgs) 5872 return 0; 5873 5874 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5875 /* Should we allocate more than one page? */ 5876 5877 if (!crq->msgs) 5878 return -ENOMEM; 5879 5880 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5881 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5882 DMA_BIDIRECTIONAL); 5883 if (dma_mapping_error(dev, crq->msg_token)) 5884 goto map_failed; 5885 5886 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5887 crq->msg_token, PAGE_SIZE); 5888 5889 if (rc == H_RESOURCE) 5890 /* maybe kexecing and resource is busy. try a reset */ 5891 rc = ibmvnic_reset_crq(adapter); 5892 retrc = rc; 5893 5894 if (rc == H_CLOSED) { 5895 dev_warn(dev, "Partner adapter not ready\n"); 5896 } else if (rc) { 5897 dev_warn(dev, "Error %d opening adapter\n", rc); 5898 goto reg_crq_failed; 5899 } 5900 5901 retrc = 0; 5902 5903 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5904 5905 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5906 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5907 adapter->vdev->unit_address); 5908 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5909 if (rc) { 5910 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5911 vdev->irq, rc); 5912 goto req_irq_failed; 5913 } 5914 5915 rc = vio_enable_interrupts(vdev); 5916 if (rc) { 5917 dev_err(dev, "Error %d enabling interrupts\n", rc); 5918 goto req_irq_failed; 5919 } 5920 5921 crq->cur = 0; 5922 spin_lock_init(&crq->lock); 5923 5924 /* process any CRQs that were queued before we enabled interrupts */ 5925 tasklet_schedule(&adapter->tasklet); 5926 5927 return retrc; 5928 5929 req_irq_failed: 5930 tasklet_kill(&adapter->tasklet); 5931 do { 5932 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5933 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5934 reg_crq_failed: 5935 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5936 map_failed: 5937 free_page((unsigned long)crq->msgs); 5938 crq->msgs = NULL; 5939 return retrc; 5940 } 5941 5942 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5943 { 5944 struct device *dev = &adapter->vdev->dev; 5945 unsigned long timeout = msecs_to_jiffies(20000); 5946 u64 old_num_rx_queues = adapter->req_rx_queues; 5947 u64 old_num_tx_queues = adapter->req_tx_queues; 5948 int rc; 5949 5950 adapter->from_passive_init = false; 5951 5952 rc = ibmvnic_send_crq_init(adapter); 5953 if (rc) { 5954 dev_err(dev, "Send crq init failed with error %d\n", rc); 5955 return rc; 5956 } 5957 5958 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5959 dev_err(dev, "Initialization sequence timed out\n"); 5960 return -ETIMEDOUT; 5961 } 5962 5963 if (adapter->init_done_rc) { 5964 release_crq_queue(adapter); 5965 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 5966 return adapter->init_done_rc; 5967 } 5968 5969 if (adapter->from_passive_init) { 5970 adapter->state = VNIC_OPEN; 5971 adapter->from_passive_init = false; 5972 dev_err(dev, "CRQ-init failed, passive-init\n"); 5973 return -EINVAL; 5974 } 5975 5976 if (reset && 5977 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5978 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5979 if (adapter->req_rx_queues != old_num_rx_queues || 5980 adapter->req_tx_queues != old_num_tx_queues) { 5981 release_sub_crqs(adapter, 0); 5982 rc = init_sub_crqs(adapter); 5983 } else { 5984 /* no need to reinitialize completely, but we do 5985 * need to clean up transmits that were in flight 5986 * when we processed the reset. Failure to do so 5987 * will confound the upper layer, usually TCP, by 5988 * creating the illusion of transmits that are 5989 * awaiting completion. 5990 */ 5991 clean_tx_pools(adapter); 5992 5993 rc = reset_sub_crq_queues(adapter); 5994 } 5995 } else { 5996 rc = init_sub_crqs(adapter); 5997 } 5998 5999 if (rc) { 6000 dev_err(dev, "Initialization of sub crqs failed\n"); 6001 release_crq_queue(adapter); 6002 return rc; 6003 } 6004 6005 rc = init_sub_crq_irqs(adapter); 6006 if (rc) { 6007 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6008 release_crq_queue(adapter); 6009 } 6010 6011 return rc; 6012 } 6013 6014 static struct device_attribute dev_attr_failover; 6015 6016 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6017 { 6018 struct ibmvnic_adapter *adapter; 6019 struct net_device *netdev; 6020 unsigned char *mac_addr_p; 6021 unsigned long flags; 6022 bool init_success; 6023 int rc; 6024 6025 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6026 dev->unit_address); 6027 6028 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6029 VETH_MAC_ADDR, NULL); 6030 if (!mac_addr_p) { 6031 dev_err(&dev->dev, 6032 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6033 __FILE__, __LINE__); 6034 return 0; 6035 } 6036 6037 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6038 IBMVNIC_MAX_QUEUES); 6039 if (!netdev) 6040 return -ENOMEM; 6041 6042 adapter = netdev_priv(netdev); 6043 adapter->state = VNIC_PROBING; 6044 dev_set_drvdata(&dev->dev, netdev); 6045 adapter->vdev = dev; 6046 adapter->netdev = netdev; 6047 adapter->login_pending = false; 6048 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6049 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6050 bitmap_set(adapter->map_ids, 0, 1); 6051 6052 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6053 eth_hw_addr_set(netdev, adapter->mac_addr); 6054 netdev->irq = dev->irq; 6055 netdev->netdev_ops = &ibmvnic_netdev_ops; 6056 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6057 SET_NETDEV_DEV(netdev, &dev->dev); 6058 6059 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6060 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6061 __ibmvnic_delayed_reset); 6062 INIT_LIST_HEAD(&adapter->rwi_list); 6063 spin_lock_init(&adapter->rwi_lock); 6064 spin_lock_init(&adapter->state_lock); 6065 mutex_init(&adapter->fw_lock); 6066 init_completion(&adapter->probe_done); 6067 init_completion(&adapter->init_done); 6068 init_completion(&adapter->fw_done); 6069 init_completion(&adapter->reset_done); 6070 init_completion(&adapter->stats_done); 6071 clear_bit(0, &adapter->resetting); 6072 adapter->prev_rx_buf_sz = 0; 6073 adapter->prev_mtu = 0; 6074 6075 init_success = false; 6076 do { 6077 reinit_init_done(adapter); 6078 6079 /* clear any failovers we got in the previous pass 6080 * since we are reinitializing the CRQ 6081 */ 6082 adapter->failover_pending = false; 6083 6084 /* If we had already initialized CRQ, we may have one or 6085 * more resets queued already. Discard those and release 6086 * the CRQ before initializing the CRQ again. 6087 */ 6088 release_crq_queue(adapter); 6089 6090 /* Since we are still in PROBING state, __ibmvnic_reset() 6091 * will not access the ->rwi_list and since we released CRQ, 6092 * we won't get _new_ transport events. But there maybe an 6093 * ongoing ibmvnic_reset() call. So serialize access to 6094 * rwi_list. If we win the race, ibvmnic_reset() could add 6095 * a reset after we purged but thats ok - we just may end 6096 * up with an extra reset (i.e similar to having two or more 6097 * resets in the queue at once). 6098 * CHECK. 6099 */ 6100 spin_lock_irqsave(&adapter->rwi_lock, flags); 6101 flush_reset_queue(adapter); 6102 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6103 6104 rc = init_crq_queue(adapter); 6105 if (rc) { 6106 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6107 rc); 6108 goto ibmvnic_init_fail; 6109 } 6110 6111 rc = ibmvnic_reset_init(adapter, false); 6112 } while (rc == -EAGAIN); 6113 6114 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6115 * partner is not ready. CRQ is not active. When the partner becomes 6116 * ready, we will do the passive init reset. 6117 */ 6118 6119 if (!rc) 6120 init_success = true; 6121 6122 rc = init_stats_buffers(adapter); 6123 if (rc) 6124 goto ibmvnic_init_fail; 6125 6126 rc = init_stats_token(adapter); 6127 if (rc) 6128 goto ibmvnic_stats_fail; 6129 6130 rc = device_create_file(&dev->dev, &dev_attr_failover); 6131 if (rc) 6132 goto ibmvnic_dev_file_err; 6133 6134 netif_carrier_off(netdev); 6135 6136 if (init_success) { 6137 adapter->state = VNIC_PROBED; 6138 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6139 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6140 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6141 } else { 6142 adapter->state = VNIC_DOWN; 6143 } 6144 6145 adapter->wait_for_reset = false; 6146 adapter->last_reset_time = jiffies; 6147 6148 rc = register_netdev(netdev); 6149 if (rc) { 6150 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6151 goto ibmvnic_register_fail; 6152 } 6153 dev_info(&dev->dev, "ibmvnic registered\n"); 6154 6155 complete(&adapter->probe_done); 6156 6157 return 0; 6158 6159 ibmvnic_register_fail: 6160 device_remove_file(&dev->dev, &dev_attr_failover); 6161 6162 ibmvnic_dev_file_err: 6163 release_stats_token(adapter); 6164 6165 ibmvnic_stats_fail: 6166 release_stats_buffers(adapter); 6167 6168 ibmvnic_init_fail: 6169 release_sub_crqs(adapter, 1); 6170 release_crq_queue(adapter); 6171 6172 /* cleanup worker thread after releasing CRQ so we don't get 6173 * transport events (i.e new work items for the worker thread). 6174 */ 6175 adapter->state = VNIC_REMOVING; 6176 complete(&adapter->probe_done); 6177 flush_work(&adapter->ibmvnic_reset); 6178 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6179 6180 flush_reset_queue(adapter); 6181 6182 mutex_destroy(&adapter->fw_lock); 6183 free_netdev(netdev); 6184 6185 return rc; 6186 } 6187 6188 static void ibmvnic_remove(struct vio_dev *dev) 6189 { 6190 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6191 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6192 unsigned long flags; 6193 6194 spin_lock_irqsave(&adapter->state_lock, flags); 6195 6196 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6197 * finish. Then, set the state to REMOVING to prevent it from 6198 * scheduling any more work and to have reset functions ignore 6199 * any resets that have already been scheduled. Drop the lock 6200 * after setting state, so __ibmvnic_reset() which is called 6201 * from the flush_work() below, can make progress. 6202 */ 6203 spin_lock(&adapter->rwi_lock); 6204 adapter->state = VNIC_REMOVING; 6205 spin_unlock(&adapter->rwi_lock); 6206 6207 spin_unlock_irqrestore(&adapter->state_lock, flags); 6208 6209 flush_work(&adapter->ibmvnic_reset); 6210 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6211 6212 rtnl_lock(); 6213 unregister_netdevice(netdev); 6214 6215 release_resources(adapter); 6216 release_rx_pools(adapter); 6217 release_tx_pools(adapter); 6218 release_sub_crqs(adapter, 1); 6219 release_crq_queue(adapter); 6220 6221 release_stats_token(adapter); 6222 release_stats_buffers(adapter); 6223 6224 adapter->state = VNIC_REMOVED; 6225 6226 rtnl_unlock(); 6227 mutex_destroy(&adapter->fw_lock); 6228 device_remove_file(&dev->dev, &dev_attr_failover); 6229 free_netdev(netdev); 6230 dev_set_drvdata(&dev->dev, NULL); 6231 } 6232 6233 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6234 const char *buf, size_t count) 6235 { 6236 struct net_device *netdev = dev_get_drvdata(dev); 6237 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6238 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6239 __be64 session_token; 6240 long rc; 6241 6242 if (!sysfs_streq(buf, "1")) 6243 return -EINVAL; 6244 6245 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6246 H_GET_SESSION_TOKEN, 0, 0, 0); 6247 if (rc) { 6248 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6249 rc); 6250 goto last_resort; 6251 } 6252 6253 session_token = (__be64)retbuf[0]; 6254 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6255 be64_to_cpu(session_token)); 6256 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6257 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6258 if (rc) { 6259 netdev_err(netdev, 6260 "H_VIOCTL initiated failover failed, rc %ld\n", 6261 rc); 6262 goto last_resort; 6263 } 6264 6265 return count; 6266 6267 last_resort: 6268 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6269 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6270 6271 return count; 6272 } 6273 static DEVICE_ATTR_WO(failover); 6274 6275 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6276 { 6277 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6278 struct ibmvnic_adapter *adapter; 6279 struct iommu_table *tbl; 6280 unsigned long ret = 0; 6281 int i; 6282 6283 tbl = get_iommu_table_base(&vdev->dev); 6284 6285 /* netdev inits at probe time along with the structures we need below*/ 6286 if (!netdev) 6287 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6288 6289 adapter = netdev_priv(netdev); 6290 6291 ret += PAGE_SIZE; /* the crq message queue */ 6292 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6293 6294 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6295 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6296 6297 for (i = 0; i < adapter->num_active_rx_pools; i++) 6298 ret += adapter->rx_pool[i].size * 6299 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6300 6301 return ret; 6302 } 6303 6304 static int ibmvnic_resume(struct device *dev) 6305 { 6306 struct net_device *netdev = dev_get_drvdata(dev); 6307 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6308 6309 if (adapter->state != VNIC_OPEN) 6310 return 0; 6311 6312 tasklet_schedule(&adapter->tasklet); 6313 6314 return 0; 6315 } 6316 6317 static const struct vio_device_id ibmvnic_device_table[] = { 6318 {"network", "IBM,vnic"}, 6319 {"", "" } 6320 }; 6321 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6322 6323 static const struct dev_pm_ops ibmvnic_pm_ops = { 6324 .resume = ibmvnic_resume 6325 }; 6326 6327 static struct vio_driver ibmvnic_driver = { 6328 .id_table = ibmvnic_device_table, 6329 .probe = ibmvnic_probe, 6330 .remove = ibmvnic_remove, 6331 .get_desired_dma = ibmvnic_get_desired_dma, 6332 .name = ibmvnic_driver_name, 6333 .pm = &ibmvnic_pm_ops, 6334 }; 6335 6336 /* module functions */ 6337 static int __init ibmvnic_module_init(void) 6338 { 6339 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6340 IBMVNIC_DRIVER_VERSION); 6341 6342 return vio_register_driver(&ibmvnic_driver); 6343 } 6344 6345 static void __exit ibmvnic_module_exit(void) 6346 { 6347 vio_unregister_driver(&ibmvnic_driver); 6348 } 6349 6350 module_init(ibmvnic_module_init); 6351 module_exit(ibmvnic_module_exit); 6352