1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/in.h> 63 #include <linux/ip.h> 64 #include <linux/ipv6.h> 65 #include <linux/irq.h> 66 #include <linux/kthread.h> 67 #include <linux/seq_file.h> 68 #include <linux/interrupt.h> 69 #include <net/net_namespace.h> 70 #include <asm/hvcall.h> 71 #include <linux/atomic.h> 72 #include <asm/vio.h> 73 #include <asm/iommu.h> 74 #include <linux/uaccess.h> 75 #include <asm/firmware.h> 76 #include <linux/workqueue.h> 77 #include <linux/if_vlan.h> 78 79 #include "ibmvnic.h" 80 81 static const char ibmvnic_driver_name[] = "ibmvnic"; 82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 83 84 MODULE_AUTHOR("Santiago Leon"); 85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 86 MODULE_LICENSE("GPL"); 87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 88 89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 90 static int ibmvnic_remove(struct vio_dev *); 91 static void release_sub_crqs(struct ibmvnic_adapter *); 92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 97 union sub_crq *sub_crq); 98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 100 static int enable_scrq_irq(struct ibmvnic_adapter *, 101 struct ibmvnic_sub_crq_queue *); 102 static int disable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int pending_scrq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static int ibmvnic_poll(struct napi_struct *napi, int data); 109 static void send_map_query(struct ibmvnic_adapter *adapter); 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 111 static void send_request_unmap(struct ibmvnic_adapter *, u8); 112 static void send_login(struct ibmvnic_adapter *adapter); 113 static void send_cap_queries(struct ibmvnic_adapter *adapter); 114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 115 static int ibmvnic_init(struct ibmvnic_adapter *); 116 static void release_crq_queue(struct ibmvnic_adapter *); 117 118 struct ibmvnic_stat { 119 char name[ETH_GSTRING_LEN]; 120 int offset; 121 }; 122 123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 124 offsetof(struct ibmvnic_statistics, stat)) 125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 126 127 static const struct ibmvnic_stat ibmvnic_stats[] = { 128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 150 }; 151 152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 153 unsigned long length, unsigned long *number, 154 unsigned long *irq) 155 { 156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 157 long rc; 158 159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 160 *number = retbuf[0]; 161 *irq = retbuf[1]; 162 163 return rc; 164 } 165 166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 167 struct ibmvnic_long_term_buff *ltb, int size) 168 { 169 struct device *dev = &adapter->vdev->dev; 170 171 ltb->size = size; 172 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 173 GFP_KERNEL); 174 175 if (!ltb->buff) { 176 dev_err(dev, "Couldn't alloc long term buffer\n"); 177 return -ENOMEM; 178 } 179 ltb->map_id = adapter->map_id; 180 adapter->map_id++; 181 182 init_completion(&adapter->fw_done); 183 send_request_map(adapter, ltb->addr, 184 ltb->size, ltb->map_id); 185 wait_for_completion(&adapter->fw_done); 186 187 if (adapter->fw_done_rc) { 188 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 189 adapter->fw_done_rc); 190 return -1; 191 } 192 return 0; 193 } 194 195 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 196 struct ibmvnic_long_term_buff *ltb) 197 { 198 struct device *dev = &adapter->vdev->dev; 199 200 if (!ltb->buff) 201 return; 202 203 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 204 adapter->reset_reason != VNIC_RESET_MOBILITY) 205 send_request_unmap(adapter, ltb->map_id); 206 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 207 } 208 209 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 210 struct ibmvnic_long_term_buff *ltb) 211 { 212 memset(ltb->buff, 0, ltb->size); 213 214 init_completion(&adapter->fw_done); 215 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 216 wait_for_completion(&adapter->fw_done); 217 218 if (adapter->fw_done_rc) { 219 dev_info(&adapter->vdev->dev, 220 "Reset failed, attempting to free and reallocate buffer\n"); 221 free_long_term_buff(adapter, ltb); 222 return alloc_long_term_buff(adapter, ltb, ltb->size); 223 } 224 return 0; 225 } 226 227 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 228 { 229 int i; 230 231 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 232 i++) 233 adapter->rx_pool[i].active = 0; 234 } 235 236 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 237 struct ibmvnic_rx_pool *pool) 238 { 239 int count = pool->size - atomic_read(&pool->available); 240 struct device *dev = &adapter->vdev->dev; 241 int buffers_added = 0; 242 unsigned long lpar_rc; 243 union sub_crq sub_crq; 244 struct sk_buff *skb; 245 unsigned int offset; 246 dma_addr_t dma_addr; 247 unsigned char *dst; 248 u64 *handle_array; 249 int shift = 0; 250 int index; 251 int i; 252 253 if (!pool->active) 254 return; 255 256 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 257 be32_to_cpu(adapter->login_rsp_buf-> 258 off_rxadd_subcrqs)); 259 260 for (i = 0; i < count; ++i) { 261 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 262 if (!skb) { 263 dev_err(dev, "Couldn't replenish rx buff\n"); 264 adapter->replenish_no_mem++; 265 break; 266 } 267 268 index = pool->free_map[pool->next_free]; 269 270 if (pool->rx_buff[index].skb) 271 dev_err(dev, "Inconsistent free_map!\n"); 272 273 /* Copy the skb to the long term mapped DMA buffer */ 274 offset = index * pool->buff_size; 275 dst = pool->long_term_buff.buff + offset; 276 memset(dst, 0, pool->buff_size); 277 dma_addr = pool->long_term_buff.addr + offset; 278 pool->rx_buff[index].data = dst; 279 280 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 281 pool->rx_buff[index].dma = dma_addr; 282 pool->rx_buff[index].skb = skb; 283 pool->rx_buff[index].pool_index = pool->index; 284 pool->rx_buff[index].size = pool->buff_size; 285 286 memset(&sub_crq, 0, sizeof(sub_crq)); 287 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 288 sub_crq.rx_add.correlator = 289 cpu_to_be64((u64)&pool->rx_buff[index]); 290 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 291 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 292 293 /* The length field of the sCRQ is defined to be 24 bits so the 294 * buffer size needs to be left shifted by a byte before it is 295 * converted to big endian to prevent the last byte from being 296 * truncated. 297 */ 298 #ifdef __LITTLE_ENDIAN__ 299 shift = 8; 300 #endif 301 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 302 303 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 304 &sub_crq); 305 if (lpar_rc != H_SUCCESS) 306 goto failure; 307 308 buffers_added++; 309 adapter->replenish_add_buff_success++; 310 pool->next_free = (pool->next_free + 1) % pool->size; 311 } 312 atomic_add(buffers_added, &pool->available); 313 return; 314 315 failure: 316 dev_info(dev, "replenish pools failure\n"); 317 pool->free_map[pool->next_free] = index; 318 pool->rx_buff[index].skb = NULL; 319 if (!dma_mapping_error(dev, dma_addr)) 320 dma_unmap_single(dev, dma_addr, pool->buff_size, 321 DMA_FROM_DEVICE); 322 323 dev_kfree_skb_any(skb); 324 adapter->replenish_add_buff_failure++; 325 atomic_add(buffers_added, &pool->available); 326 327 if (lpar_rc == H_CLOSED) { 328 /* Disable buffer pool replenishment and report carrier off if 329 * queue is closed. Firmware guarantees that a signal will 330 * be sent to the driver, triggering a reset. 331 */ 332 deactivate_rx_pools(adapter); 333 netif_carrier_off(adapter->netdev); 334 } 335 } 336 337 static void replenish_pools(struct ibmvnic_adapter *adapter) 338 { 339 int i; 340 341 adapter->replenish_task_cycles++; 342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 343 i++) { 344 if (adapter->rx_pool[i].active) 345 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 346 } 347 } 348 349 static void release_stats_token(struct ibmvnic_adapter *adapter) 350 { 351 struct device *dev = &adapter->vdev->dev; 352 353 if (!adapter->stats_token) 354 return; 355 356 dma_unmap_single(dev, adapter->stats_token, 357 sizeof(struct ibmvnic_statistics), 358 DMA_FROM_DEVICE); 359 adapter->stats_token = 0; 360 } 361 362 static int init_stats_token(struct ibmvnic_adapter *adapter) 363 { 364 struct device *dev = &adapter->vdev->dev; 365 dma_addr_t stok; 366 367 stok = dma_map_single(dev, &adapter->stats, 368 sizeof(struct ibmvnic_statistics), 369 DMA_FROM_DEVICE); 370 if (dma_mapping_error(dev, stok)) { 371 dev_err(dev, "Couldn't map stats buffer\n"); 372 return -1; 373 } 374 375 adapter->stats_token = stok; 376 return 0; 377 } 378 379 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 380 { 381 struct ibmvnic_rx_pool *rx_pool; 382 int rx_scrqs; 383 int i, j, rc; 384 385 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 386 for (i = 0; i < rx_scrqs; i++) { 387 rx_pool = &adapter->rx_pool[i]; 388 389 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff); 390 if (rc) 391 return rc; 392 393 for (j = 0; j < rx_pool->size; j++) 394 rx_pool->free_map[j] = j; 395 396 memset(rx_pool->rx_buff, 0, 397 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 398 399 atomic_set(&rx_pool->available, 0); 400 rx_pool->next_alloc = 0; 401 rx_pool->next_free = 0; 402 rx_pool->active = 1; 403 } 404 405 return 0; 406 } 407 408 static void release_rx_pools(struct ibmvnic_adapter *adapter) 409 { 410 struct ibmvnic_rx_pool *rx_pool; 411 int rx_scrqs; 412 int i, j; 413 414 if (!adapter->rx_pool) 415 return; 416 417 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 418 for (i = 0; i < rx_scrqs; i++) { 419 rx_pool = &adapter->rx_pool[i]; 420 421 kfree(rx_pool->free_map); 422 free_long_term_buff(adapter, &rx_pool->long_term_buff); 423 424 if (!rx_pool->rx_buff) 425 continue; 426 427 for (j = 0; j < rx_pool->size; j++) { 428 if (rx_pool->rx_buff[j].skb) { 429 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 430 rx_pool->rx_buff[i].skb = NULL; 431 } 432 } 433 434 kfree(rx_pool->rx_buff); 435 } 436 437 kfree(adapter->rx_pool); 438 adapter->rx_pool = NULL; 439 } 440 441 static int init_rx_pools(struct net_device *netdev) 442 { 443 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 444 struct device *dev = &adapter->vdev->dev; 445 struct ibmvnic_rx_pool *rx_pool; 446 int rxadd_subcrqs; 447 u64 *size_array; 448 int i, j; 449 450 rxadd_subcrqs = 451 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 452 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 453 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 454 455 adapter->rx_pool = kcalloc(rxadd_subcrqs, 456 sizeof(struct ibmvnic_rx_pool), 457 GFP_KERNEL); 458 if (!adapter->rx_pool) { 459 dev_err(dev, "Failed to allocate rx pools\n"); 460 return -1; 461 } 462 463 for (i = 0; i < rxadd_subcrqs; i++) { 464 rx_pool = &adapter->rx_pool[i]; 465 466 netdev_dbg(adapter->netdev, 467 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 468 i, adapter->req_rx_add_entries_per_subcrq, 469 be64_to_cpu(size_array[i])); 470 471 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 472 rx_pool->index = i; 473 rx_pool->buff_size = be64_to_cpu(size_array[i]); 474 rx_pool->active = 1; 475 476 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 477 GFP_KERNEL); 478 if (!rx_pool->free_map) { 479 release_rx_pools(adapter); 480 return -1; 481 } 482 483 rx_pool->rx_buff = kcalloc(rx_pool->size, 484 sizeof(struct ibmvnic_rx_buff), 485 GFP_KERNEL); 486 if (!rx_pool->rx_buff) { 487 dev_err(dev, "Couldn't alloc rx buffers\n"); 488 release_rx_pools(adapter); 489 return -1; 490 } 491 492 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 493 rx_pool->size * rx_pool->buff_size)) { 494 release_rx_pools(adapter); 495 return -1; 496 } 497 498 for (j = 0; j < rx_pool->size; ++j) 499 rx_pool->free_map[j] = j; 500 501 atomic_set(&rx_pool->available, 0); 502 rx_pool->next_alloc = 0; 503 rx_pool->next_free = 0; 504 } 505 506 return 0; 507 } 508 509 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 510 { 511 struct ibmvnic_tx_pool *tx_pool; 512 int tx_scrqs; 513 int i, j, rc; 514 515 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 516 for (i = 0; i < tx_scrqs; i++) { 517 tx_pool = &adapter->tx_pool[i]; 518 519 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 520 if (rc) 521 return rc; 522 523 memset(tx_pool->tx_buff, 0, 524 adapter->req_tx_entries_per_subcrq * 525 sizeof(struct ibmvnic_tx_buff)); 526 527 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 528 tx_pool->free_map[j] = j; 529 530 tx_pool->consumer_index = 0; 531 tx_pool->producer_index = 0; 532 } 533 534 return 0; 535 } 536 537 static void release_tx_pools(struct ibmvnic_adapter *adapter) 538 { 539 struct ibmvnic_tx_pool *tx_pool; 540 int i, tx_scrqs; 541 542 if (!adapter->tx_pool) 543 return; 544 545 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 546 for (i = 0; i < tx_scrqs; i++) { 547 tx_pool = &adapter->tx_pool[i]; 548 kfree(tx_pool->tx_buff); 549 free_long_term_buff(adapter, &tx_pool->long_term_buff); 550 kfree(tx_pool->free_map); 551 } 552 553 kfree(adapter->tx_pool); 554 adapter->tx_pool = NULL; 555 } 556 557 static int init_tx_pools(struct net_device *netdev) 558 { 559 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 560 struct device *dev = &adapter->vdev->dev; 561 struct ibmvnic_tx_pool *tx_pool; 562 int tx_subcrqs; 563 int i, j; 564 565 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 566 adapter->tx_pool = kcalloc(tx_subcrqs, 567 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 568 if (!adapter->tx_pool) 569 return -1; 570 571 for (i = 0; i < tx_subcrqs; i++) { 572 tx_pool = &adapter->tx_pool[i]; 573 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 574 sizeof(struct ibmvnic_tx_buff), 575 GFP_KERNEL); 576 if (!tx_pool->tx_buff) { 577 dev_err(dev, "tx pool buffer allocation failed\n"); 578 release_tx_pools(adapter); 579 return -1; 580 } 581 582 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 583 adapter->req_tx_entries_per_subcrq * 584 adapter->req_mtu)) { 585 release_tx_pools(adapter); 586 return -1; 587 } 588 589 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 590 sizeof(int), GFP_KERNEL); 591 if (!tx_pool->free_map) { 592 release_tx_pools(adapter); 593 return -1; 594 } 595 596 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 597 tx_pool->free_map[j] = j; 598 599 tx_pool->consumer_index = 0; 600 tx_pool->producer_index = 0; 601 } 602 603 return 0; 604 } 605 606 static void release_error_buffers(struct ibmvnic_adapter *adapter) 607 { 608 struct device *dev = &adapter->vdev->dev; 609 struct ibmvnic_error_buff *error_buff, *tmp; 610 unsigned long flags; 611 612 spin_lock_irqsave(&adapter->error_list_lock, flags); 613 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 614 list_del(&error_buff->list); 615 dma_unmap_single(dev, error_buff->dma, error_buff->len, 616 DMA_FROM_DEVICE); 617 kfree(error_buff->buff); 618 kfree(error_buff); 619 } 620 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 621 } 622 623 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 624 { 625 int i; 626 627 if (adapter->napi_enabled) 628 return; 629 630 for (i = 0; i < adapter->req_rx_queues; i++) 631 napi_enable(&adapter->napi[i]); 632 633 adapter->napi_enabled = true; 634 } 635 636 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 637 { 638 int i; 639 640 if (!adapter->napi_enabled) 641 return; 642 643 for (i = 0; i < adapter->req_rx_queues; i++) 644 napi_disable(&adapter->napi[i]); 645 646 adapter->napi_enabled = false; 647 } 648 649 static int ibmvnic_login(struct net_device *netdev) 650 { 651 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 652 unsigned long timeout = msecs_to_jiffies(30000); 653 struct device *dev = &adapter->vdev->dev; 654 655 do { 656 if (adapter->renegotiate) { 657 adapter->renegotiate = false; 658 release_sub_crqs(adapter); 659 660 reinit_completion(&adapter->init_done); 661 send_cap_queries(adapter); 662 if (!wait_for_completion_timeout(&adapter->init_done, 663 timeout)) { 664 dev_err(dev, "Capabilities query timeout\n"); 665 return -1; 666 } 667 } 668 669 reinit_completion(&adapter->init_done); 670 send_login(adapter); 671 if (!wait_for_completion_timeout(&adapter->init_done, 672 timeout)) { 673 dev_err(dev, "Login timeout\n"); 674 return -1; 675 } 676 } while (adapter->renegotiate); 677 678 return 0; 679 } 680 681 static void release_resources(struct ibmvnic_adapter *adapter) 682 { 683 int i; 684 685 release_tx_pools(adapter); 686 release_rx_pools(adapter); 687 688 release_stats_token(adapter); 689 release_error_buffers(adapter); 690 691 if (adapter->napi) { 692 for (i = 0; i < adapter->req_rx_queues; i++) { 693 if (&adapter->napi[i]) 694 netif_napi_del(&adapter->napi[i]); 695 } 696 } 697 } 698 699 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 700 { 701 struct net_device *netdev = adapter->netdev; 702 unsigned long timeout = msecs_to_jiffies(30000); 703 union ibmvnic_crq crq; 704 bool resend; 705 int rc; 706 707 netdev_err(netdev, "setting link state %d\n", link_state); 708 memset(&crq, 0, sizeof(crq)); 709 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 710 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 711 crq.logical_link_state.link_state = link_state; 712 713 do { 714 resend = false; 715 716 reinit_completion(&adapter->init_done); 717 rc = ibmvnic_send_crq(adapter, &crq); 718 if (rc) { 719 netdev_err(netdev, "Failed to set link state\n"); 720 return rc; 721 } 722 723 if (!wait_for_completion_timeout(&adapter->init_done, 724 timeout)) { 725 netdev_err(netdev, "timeout setting link state\n"); 726 return -1; 727 } 728 729 if (adapter->init_done_rc == 1) { 730 /* Partuial success, delay and re-send */ 731 mdelay(1000); 732 resend = true; 733 } 734 } while (resend); 735 736 return 0; 737 } 738 739 static int set_real_num_queues(struct net_device *netdev) 740 { 741 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 742 int rc; 743 744 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 745 if (rc) { 746 netdev_err(netdev, "failed to set the number of tx queues\n"); 747 return rc; 748 } 749 750 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 751 if (rc) 752 netdev_err(netdev, "failed to set the number of rx queues\n"); 753 754 return rc; 755 } 756 757 static int init_resources(struct ibmvnic_adapter *adapter) 758 { 759 struct net_device *netdev = adapter->netdev; 760 int i, rc; 761 762 rc = set_real_num_queues(netdev); 763 if (rc) 764 return rc; 765 766 rc = init_stats_token(adapter); 767 if (rc) 768 return rc; 769 770 adapter->map_id = 1; 771 adapter->napi = kcalloc(adapter->req_rx_queues, 772 sizeof(struct napi_struct), GFP_KERNEL); 773 if (!adapter->napi) 774 return -ENOMEM; 775 776 for (i = 0; i < adapter->req_rx_queues; i++) { 777 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 778 NAPI_POLL_WEIGHT); 779 } 780 781 send_map_query(adapter); 782 783 rc = init_rx_pools(netdev); 784 if (rc) 785 return rc; 786 787 rc = init_tx_pools(netdev); 788 return rc; 789 } 790 791 static int __ibmvnic_open(struct net_device *netdev) 792 { 793 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 794 enum vnic_state prev_state = adapter->state; 795 int i, rc; 796 797 adapter->state = VNIC_OPENING; 798 replenish_pools(adapter); 799 ibmvnic_napi_enable(adapter); 800 801 /* We're ready to receive frames, enable the sub-crq interrupts and 802 * set the logical link state to up 803 */ 804 for (i = 0; i < adapter->req_rx_queues; i++) { 805 if (prev_state == VNIC_CLOSED) 806 enable_irq(adapter->rx_scrq[i]->irq); 807 else 808 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 809 } 810 811 for (i = 0; i < adapter->req_tx_queues; i++) { 812 if (prev_state == VNIC_CLOSED) 813 enable_irq(adapter->tx_scrq[i]->irq); 814 else 815 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 816 } 817 818 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 819 if (rc) { 820 for (i = 0; i < adapter->req_rx_queues; i++) 821 napi_disable(&adapter->napi[i]); 822 release_resources(adapter); 823 return rc; 824 } 825 826 netif_tx_start_all_queues(netdev); 827 828 if (prev_state == VNIC_CLOSED) { 829 for (i = 0; i < adapter->req_rx_queues; i++) 830 napi_schedule(&adapter->napi[i]); 831 } 832 833 adapter->state = VNIC_OPEN; 834 return rc; 835 } 836 837 static int ibmvnic_open(struct net_device *netdev) 838 { 839 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 840 int rc; 841 842 mutex_lock(&adapter->reset_lock); 843 844 if (adapter->state != VNIC_CLOSED) { 845 rc = ibmvnic_login(netdev); 846 if (rc) { 847 mutex_unlock(&adapter->reset_lock); 848 return rc; 849 } 850 851 rc = init_resources(adapter); 852 if (rc) { 853 netdev_err(netdev, "failed to initialize resources\n"); 854 release_resources(adapter); 855 mutex_unlock(&adapter->reset_lock); 856 return rc; 857 } 858 } 859 860 rc = __ibmvnic_open(netdev); 861 mutex_unlock(&adapter->reset_lock); 862 863 return rc; 864 } 865 866 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 867 { 868 struct ibmvnic_tx_pool *tx_pool; 869 u64 tx_entries; 870 int tx_scrqs; 871 int i, j; 872 873 if (!adapter->tx_pool) 874 return; 875 876 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 877 tx_entries = adapter->req_tx_entries_per_subcrq; 878 879 /* Free any remaining skbs in the tx buffer pools */ 880 for (i = 0; i < tx_scrqs; i++) { 881 tx_pool = &adapter->tx_pool[i]; 882 if (!tx_pool) 883 continue; 884 885 for (j = 0; j < tx_entries; j++) { 886 if (tx_pool->tx_buff[j].skb) { 887 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 888 tx_pool->tx_buff[j].skb = NULL; 889 } 890 } 891 } 892 } 893 894 static int __ibmvnic_close(struct net_device *netdev) 895 { 896 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 897 int rc = 0; 898 int i; 899 900 adapter->state = VNIC_CLOSING; 901 902 /* ensure that transmissions are stopped if called by do_reset */ 903 if (adapter->resetting) 904 netif_tx_disable(netdev); 905 else 906 netif_tx_stop_all_queues(netdev); 907 908 ibmvnic_napi_disable(adapter); 909 910 if (adapter->tx_scrq) { 911 for (i = 0; i < adapter->req_tx_queues; i++) 912 if (adapter->tx_scrq[i]->irq) 913 disable_irq(adapter->tx_scrq[i]->irq); 914 } 915 916 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 917 if (rc) 918 return rc; 919 920 if (adapter->rx_scrq) { 921 for (i = 0; i < adapter->req_rx_queues; i++) { 922 int retries = 10; 923 924 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 925 retries--; 926 mdelay(100); 927 928 if (retries == 0) 929 break; 930 } 931 932 if (adapter->rx_scrq[i]->irq) 933 disable_irq(adapter->rx_scrq[i]->irq); 934 } 935 } 936 937 clean_tx_pools(adapter); 938 adapter->state = VNIC_CLOSED; 939 return rc; 940 } 941 942 static int ibmvnic_close(struct net_device *netdev) 943 { 944 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 945 int rc; 946 947 mutex_lock(&adapter->reset_lock); 948 rc = __ibmvnic_close(netdev); 949 mutex_unlock(&adapter->reset_lock); 950 951 return rc; 952 } 953 954 /** 955 * build_hdr_data - creates L2/L3/L4 header data buffer 956 * @hdr_field - bitfield determining needed headers 957 * @skb - socket buffer 958 * @hdr_len - array of header lengths 959 * @tot_len - total length of data 960 * 961 * Reads hdr_field to determine which headers are needed by firmware. 962 * Builds a buffer containing these headers. Saves individual header 963 * lengths and total buffer length to be used to build descriptors. 964 */ 965 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 966 int *hdr_len, u8 *hdr_data) 967 { 968 int len = 0; 969 u8 *hdr; 970 971 hdr_len[0] = sizeof(struct ethhdr); 972 973 if (skb->protocol == htons(ETH_P_IP)) { 974 hdr_len[1] = ip_hdr(skb)->ihl * 4; 975 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 976 hdr_len[2] = tcp_hdrlen(skb); 977 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 978 hdr_len[2] = sizeof(struct udphdr); 979 } else if (skb->protocol == htons(ETH_P_IPV6)) { 980 hdr_len[1] = sizeof(struct ipv6hdr); 981 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 982 hdr_len[2] = tcp_hdrlen(skb); 983 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 984 hdr_len[2] = sizeof(struct udphdr); 985 } 986 987 memset(hdr_data, 0, 120); 988 if ((hdr_field >> 6) & 1) { 989 hdr = skb_mac_header(skb); 990 memcpy(hdr_data, hdr, hdr_len[0]); 991 len += hdr_len[0]; 992 } 993 994 if ((hdr_field >> 5) & 1) { 995 hdr = skb_network_header(skb); 996 memcpy(hdr_data + len, hdr, hdr_len[1]); 997 len += hdr_len[1]; 998 } 999 1000 if ((hdr_field >> 4) & 1) { 1001 hdr = skb_transport_header(skb); 1002 memcpy(hdr_data + len, hdr, hdr_len[2]); 1003 len += hdr_len[2]; 1004 } 1005 return len; 1006 } 1007 1008 /** 1009 * create_hdr_descs - create header and header extension descriptors 1010 * @hdr_field - bitfield determining needed headers 1011 * @data - buffer containing header data 1012 * @len - length of data buffer 1013 * @hdr_len - array of individual header lengths 1014 * @scrq_arr - descriptor array 1015 * 1016 * Creates header and, if needed, header extension descriptors and 1017 * places them in a descriptor array, scrq_arr 1018 */ 1019 1020 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1021 union sub_crq *scrq_arr) 1022 { 1023 union sub_crq hdr_desc; 1024 int tmp_len = len; 1025 u8 *data, *cur; 1026 int tmp; 1027 1028 while (tmp_len > 0) { 1029 cur = hdr_data + len - tmp_len; 1030 1031 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1032 if (cur != hdr_data) { 1033 data = hdr_desc.hdr_ext.data; 1034 tmp = tmp_len > 29 ? 29 : tmp_len; 1035 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1036 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1037 hdr_desc.hdr_ext.len = tmp; 1038 } else { 1039 data = hdr_desc.hdr.data; 1040 tmp = tmp_len > 24 ? 24 : tmp_len; 1041 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1042 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1043 hdr_desc.hdr.len = tmp; 1044 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1045 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1046 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1047 hdr_desc.hdr.flag = hdr_field << 1; 1048 } 1049 memcpy(data, cur, tmp); 1050 tmp_len -= tmp; 1051 *scrq_arr = hdr_desc; 1052 scrq_arr++; 1053 } 1054 } 1055 1056 /** 1057 * build_hdr_descs_arr - build a header descriptor array 1058 * @skb - socket buffer 1059 * @num_entries - number of descriptors to be sent 1060 * @subcrq - first TX descriptor 1061 * @hdr_field - bit field determining which headers will be sent 1062 * 1063 * This function will build a TX descriptor array with applicable 1064 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1065 */ 1066 1067 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1068 int *num_entries, u8 hdr_field) 1069 { 1070 int hdr_len[3] = {0, 0, 0}; 1071 int tot_len, len; 1072 u8 *hdr_data = txbuff->hdr_data; 1073 1074 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1075 txbuff->hdr_data); 1076 len = tot_len; 1077 len -= 24; 1078 if (len > 0) 1079 num_entries += len % 29 ? len / 29 + 1 : len / 29; 1080 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1081 txbuff->indir_arr + 1); 1082 } 1083 1084 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1085 { 1086 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1087 int queue_num = skb_get_queue_mapping(skb); 1088 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1089 struct device *dev = &adapter->vdev->dev; 1090 struct ibmvnic_tx_buff *tx_buff = NULL; 1091 struct ibmvnic_sub_crq_queue *tx_scrq; 1092 struct ibmvnic_tx_pool *tx_pool; 1093 unsigned int tx_send_failed = 0; 1094 unsigned int tx_map_failed = 0; 1095 unsigned int tx_dropped = 0; 1096 unsigned int tx_packets = 0; 1097 unsigned int tx_bytes = 0; 1098 dma_addr_t data_dma_addr; 1099 struct netdev_queue *txq; 1100 unsigned long lpar_rc; 1101 union sub_crq tx_crq; 1102 unsigned int offset; 1103 int num_entries = 1; 1104 unsigned char *dst; 1105 u64 *handle_array; 1106 int index = 0; 1107 int ret = 0; 1108 1109 if (adapter->resetting) { 1110 if (!netif_subqueue_stopped(netdev, skb)) 1111 netif_stop_subqueue(netdev, queue_num); 1112 dev_kfree_skb_any(skb); 1113 1114 tx_send_failed++; 1115 tx_dropped++; 1116 ret = NETDEV_TX_OK; 1117 goto out; 1118 } 1119 1120 tx_pool = &adapter->tx_pool[queue_num]; 1121 tx_scrq = adapter->tx_scrq[queue_num]; 1122 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1123 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1124 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1125 1126 index = tx_pool->free_map[tx_pool->consumer_index]; 1127 offset = index * adapter->req_mtu; 1128 dst = tx_pool->long_term_buff.buff + offset; 1129 memset(dst, 0, adapter->req_mtu); 1130 skb_copy_from_linear_data(skb, dst, skb->len); 1131 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1132 1133 tx_pool->consumer_index = 1134 (tx_pool->consumer_index + 1) % 1135 adapter->req_tx_entries_per_subcrq; 1136 1137 tx_buff = &tx_pool->tx_buff[index]; 1138 tx_buff->skb = skb; 1139 tx_buff->data_dma[0] = data_dma_addr; 1140 tx_buff->data_len[0] = skb->len; 1141 tx_buff->index = index; 1142 tx_buff->pool_index = queue_num; 1143 tx_buff->last_frag = true; 1144 1145 memset(&tx_crq, 0, sizeof(tx_crq)); 1146 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1147 tx_crq.v1.type = IBMVNIC_TX_DESC; 1148 tx_crq.v1.n_crq_elem = 1; 1149 tx_crq.v1.n_sge = 1; 1150 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1151 tx_crq.v1.correlator = cpu_to_be32(index); 1152 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1153 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1154 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1155 1156 if (adapter->vlan_header_insertion) { 1157 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1158 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1159 } 1160 1161 if (skb->protocol == htons(ETH_P_IP)) { 1162 if (ip_hdr(skb)->version == 4) 1163 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1164 else if (ip_hdr(skb)->version == 6) 1165 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1166 1167 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1168 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1169 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 1170 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1171 } 1172 1173 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1174 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1175 hdrs += 2; 1176 } 1177 /* determine if l2/3/4 headers are sent to firmware */ 1178 if ((*hdrs >> 7) & 1 && 1179 (skb->protocol == htons(ETH_P_IP) || 1180 skb->protocol == htons(ETH_P_IPV6))) { 1181 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1182 tx_crq.v1.n_crq_elem = num_entries; 1183 tx_buff->indir_arr[0] = tx_crq; 1184 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1185 sizeof(tx_buff->indir_arr), 1186 DMA_TO_DEVICE); 1187 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1188 dev_kfree_skb_any(skb); 1189 tx_buff->skb = NULL; 1190 if (!firmware_has_feature(FW_FEATURE_CMO)) 1191 dev_err(dev, "tx: unable to map descriptor array\n"); 1192 tx_map_failed++; 1193 tx_dropped++; 1194 ret = NETDEV_TX_OK; 1195 goto out; 1196 } 1197 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1198 (u64)tx_buff->indir_dma, 1199 (u64)num_entries); 1200 } else { 1201 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1202 &tx_crq); 1203 } 1204 if (lpar_rc != H_SUCCESS) { 1205 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1206 1207 if (tx_pool->consumer_index == 0) 1208 tx_pool->consumer_index = 1209 adapter->req_tx_entries_per_subcrq - 1; 1210 else 1211 tx_pool->consumer_index--; 1212 1213 dev_kfree_skb_any(skb); 1214 tx_buff->skb = NULL; 1215 1216 if (lpar_rc == H_CLOSED) { 1217 /* Disable TX and report carrier off if queue is closed. 1218 * Firmware guarantees that a signal will be sent to the 1219 * driver, triggering a reset or some other action. 1220 */ 1221 netif_tx_stop_all_queues(netdev); 1222 netif_carrier_off(netdev); 1223 } 1224 1225 tx_send_failed++; 1226 tx_dropped++; 1227 ret = NETDEV_TX_OK; 1228 goto out; 1229 } 1230 1231 if (atomic_inc_return(&tx_scrq->used) 1232 >= adapter->req_tx_entries_per_subcrq) { 1233 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1234 netif_stop_subqueue(netdev, queue_num); 1235 } 1236 1237 tx_packets++; 1238 tx_bytes += skb->len; 1239 txq->trans_start = jiffies; 1240 ret = NETDEV_TX_OK; 1241 1242 out: 1243 netdev->stats.tx_dropped += tx_dropped; 1244 netdev->stats.tx_bytes += tx_bytes; 1245 netdev->stats.tx_packets += tx_packets; 1246 adapter->tx_send_failed += tx_send_failed; 1247 adapter->tx_map_failed += tx_map_failed; 1248 1249 return ret; 1250 } 1251 1252 static void ibmvnic_set_multi(struct net_device *netdev) 1253 { 1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1255 struct netdev_hw_addr *ha; 1256 union ibmvnic_crq crq; 1257 1258 memset(&crq, 0, sizeof(crq)); 1259 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1260 crq.request_capability.cmd = REQUEST_CAPABILITY; 1261 1262 if (netdev->flags & IFF_PROMISC) { 1263 if (!adapter->promisc_supported) 1264 return; 1265 } else { 1266 if (netdev->flags & IFF_ALLMULTI) { 1267 /* Accept all multicast */ 1268 memset(&crq, 0, sizeof(crq)); 1269 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1270 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1271 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1272 ibmvnic_send_crq(adapter, &crq); 1273 } else if (netdev_mc_empty(netdev)) { 1274 /* Reject all multicast */ 1275 memset(&crq, 0, sizeof(crq)); 1276 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1277 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1278 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1279 ibmvnic_send_crq(adapter, &crq); 1280 } else { 1281 /* Accept one or more multicast(s) */ 1282 netdev_for_each_mc_addr(ha, netdev) { 1283 memset(&crq, 0, sizeof(crq)); 1284 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1285 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1286 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1287 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1288 ha->addr); 1289 ibmvnic_send_crq(adapter, &crq); 1290 } 1291 } 1292 } 1293 } 1294 1295 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1296 { 1297 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1298 struct sockaddr *addr = p; 1299 union ibmvnic_crq crq; 1300 1301 if (!is_valid_ether_addr(addr->sa_data)) 1302 return -EADDRNOTAVAIL; 1303 1304 memset(&crq, 0, sizeof(crq)); 1305 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1306 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1307 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1308 ibmvnic_send_crq(adapter, &crq); 1309 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1310 return 0; 1311 } 1312 1313 /** 1314 * do_reset returns zero if we are able to keep processing reset events, or 1315 * non-zero if we hit a fatal error and must halt. 1316 */ 1317 static int do_reset(struct ibmvnic_adapter *adapter, 1318 struct ibmvnic_rwi *rwi, u32 reset_state) 1319 { 1320 struct net_device *netdev = adapter->netdev; 1321 int i, rc; 1322 1323 netif_carrier_off(netdev); 1324 adapter->reset_reason = rwi->reset_reason; 1325 1326 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1327 rc = ibmvnic_reenable_crq_queue(adapter); 1328 if (rc) 1329 return 0; 1330 } 1331 1332 rc = __ibmvnic_close(netdev); 1333 if (rc) 1334 return rc; 1335 1336 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1337 /* remove the closed state so when we call open it appears 1338 * we are coming from the probed state. 1339 */ 1340 adapter->state = VNIC_PROBED; 1341 1342 rc = ibmvnic_init(adapter); 1343 if (rc) 1344 return 0; 1345 1346 /* If the adapter was in PROBE state prior to the reset, 1347 * exit here. 1348 */ 1349 if (reset_state == VNIC_PROBED) 1350 return 0; 1351 1352 rc = ibmvnic_login(netdev); 1353 if (rc) { 1354 adapter->state = VNIC_PROBED; 1355 return 0; 1356 } 1357 1358 rc = reset_tx_pools(adapter); 1359 if (rc) 1360 return rc; 1361 1362 rc = reset_rx_pools(adapter); 1363 if (rc) 1364 return rc; 1365 1366 if (reset_state == VNIC_CLOSED) 1367 return 0; 1368 } 1369 1370 rc = __ibmvnic_open(netdev); 1371 if (rc) { 1372 if (list_empty(&adapter->rwi_list)) 1373 adapter->state = VNIC_CLOSED; 1374 else 1375 adapter->state = reset_state; 1376 1377 return 0; 1378 } 1379 1380 netif_carrier_on(netdev); 1381 1382 /* kick napi */ 1383 for (i = 0; i < adapter->req_rx_queues; i++) 1384 napi_schedule(&adapter->napi[i]); 1385 1386 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1387 netdev_notify_peers(netdev); 1388 1389 return 0; 1390 } 1391 1392 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1393 { 1394 struct ibmvnic_rwi *rwi; 1395 1396 mutex_lock(&adapter->rwi_lock); 1397 1398 if (!list_empty(&adapter->rwi_list)) { 1399 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1400 list); 1401 list_del(&rwi->list); 1402 } else { 1403 rwi = NULL; 1404 } 1405 1406 mutex_unlock(&adapter->rwi_lock); 1407 return rwi; 1408 } 1409 1410 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1411 { 1412 struct ibmvnic_rwi *rwi; 1413 1414 rwi = get_next_rwi(adapter); 1415 while (rwi) { 1416 kfree(rwi); 1417 rwi = get_next_rwi(adapter); 1418 } 1419 } 1420 1421 static void __ibmvnic_reset(struct work_struct *work) 1422 { 1423 struct ibmvnic_rwi *rwi; 1424 struct ibmvnic_adapter *adapter; 1425 struct net_device *netdev; 1426 u32 reset_state; 1427 int rc; 1428 1429 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1430 netdev = adapter->netdev; 1431 1432 mutex_lock(&adapter->reset_lock); 1433 adapter->resetting = true; 1434 reset_state = adapter->state; 1435 1436 rwi = get_next_rwi(adapter); 1437 while (rwi) { 1438 rc = do_reset(adapter, rwi, reset_state); 1439 kfree(rwi); 1440 if (rc) 1441 break; 1442 1443 rwi = get_next_rwi(adapter); 1444 } 1445 1446 if (rc) { 1447 free_all_rwi(adapter); 1448 mutex_unlock(&adapter->reset_lock); 1449 return; 1450 } 1451 1452 adapter->resetting = false; 1453 mutex_unlock(&adapter->reset_lock); 1454 } 1455 1456 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1457 enum ibmvnic_reset_reason reason) 1458 { 1459 struct ibmvnic_rwi *rwi, *tmp; 1460 struct net_device *netdev = adapter->netdev; 1461 struct list_head *entry; 1462 1463 if (adapter->state == VNIC_REMOVING || 1464 adapter->state == VNIC_REMOVED) { 1465 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1466 return; 1467 } 1468 1469 if (adapter->state == VNIC_PROBING) { 1470 netdev_warn(netdev, "Adapter reset during probe\n"); 1471 adapter->init_done_rc = EAGAIN; 1472 return; 1473 } 1474 1475 mutex_lock(&adapter->rwi_lock); 1476 1477 list_for_each(entry, &adapter->rwi_list) { 1478 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1479 if (tmp->reset_reason == reason) { 1480 netdev_err(netdev, "Matching reset found, skipping\n"); 1481 mutex_unlock(&adapter->rwi_lock); 1482 return; 1483 } 1484 } 1485 1486 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1487 if (!rwi) { 1488 mutex_unlock(&adapter->rwi_lock); 1489 ibmvnic_close(netdev); 1490 return; 1491 } 1492 1493 rwi->reset_reason = reason; 1494 list_add_tail(&rwi->list, &adapter->rwi_list); 1495 mutex_unlock(&adapter->rwi_lock); 1496 schedule_work(&adapter->ibmvnic_reset); 1497 } 1498 1499 static void ibmvnic_tx_timeout(struct net_device *dev) 1500 { 1501 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1502 1503 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1504 } 1505 1506 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1507 struct ibmvnic_rx_buff *rx_buff) 1508 { 1509 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1510 1511 rx_buff->skb = NULL; 1512 1513 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1514 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1515 1516 atomic_dec(&pool->available); 1517 } 1518 1519 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1520 { 1521 struct net_device *netdev = napi->dev; 1522 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1523 int scrq_num = (int)(napi - adapter->napi); 1524 int frames_processed = 0; 1525 1526 restart_poll: 1527 while (frames_processed < budget) { 1528 struct sk_buff *skb; 1529 struct ibmvnic_rx_buff *rx_buff; 1530 union sub_crq *next; 1531 u32 length; 1532 u16 offset; 1533 u8 flags = 0; 1534 1535 if (unlikely(adapter->resetting)) { 1536 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1537 napi_complete_done(napi, frames_processed); 1538 return frames_processed; 1539 } 1540 1541 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1542 break; 1543 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1544 rx_buff = 1545 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1546 rx_comp.correlator); 1547 /* do error checking */ 1548 if (next->rx_comp.rc) { 1549 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1550 /* free the entry */ 1551 next->rx_comp.first = 0; 1552 remove_buff_from_pool(adapter, rx_buff); 1553 continue; 1554 } 1555 1556 length = be32_to_cpu(next->rx_comp.len); 1557 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1558 flags = next->rx_comp.flags; 1559 skb = rx_buff->skb; 1560 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1561 length); 1562 1563 /* VLAN Header has been stripped by the system firmware and 1564 * needs to be inserted by the driver 1565 */ 1566 if (adapter->rx_vlan_header_insertion && 1567 (flags & IBMVNIC_VLAN_STRIPPED)) 1568 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1569 ntohs(next->rx_comp.vlan_tci)); 1570 1571 /* free the entry */ 1572 next->rx_comp.first = 0; 1573 remove_buff_from_pool(adapter, rx_buff); 1574 1575 skb_put(skb, length); 1576 skb->protocol = eth_type_trans(skb, netdev); 1577 skb_record_rx_queue(skb, scrq_num); 1578 1579 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1580 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1581 skb->ip_summed = CHECKSUM_UNNECESSARY; 1582 } 1583 1584 length = skb->len; 1585 napi_gro_receive(napi, skb); /* send it up */ 1586 netdev->stats.rx_packets++; 1587 netdev->stats.rx_bytes += length; 1588 frames_processed++; 1589 } 1590 1591 if (adapter->state != VNIC_CLOSING) 1592 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1593 1594 if (frames_processed < budget) { 1595 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1596 napi_complete_done(napi, frames_processed); 1597 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1598 napi_reschedule(napi)) { 1599 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1600 goto restart_poll; 1601 } 1602 } 1603 return frames_processed; 1604 } 1605 1606 #ifdef CONFIG_NET_POLL_CONTROLLER 1607 static void ibmvnic_netpoll_controller(struct net_device *dev) 1608 { 1609 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1610 int i; 1611 1612 replenish_pools(netdev_priv(dev)); 1613 for (i = 0; i < adapter->req_rx_queues; i++) 1614 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1615 adapter->rx_scrq[i]); 1616 } 1617 #endif 1618 1619 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 1620 { 1621 return -EOPNOTSUPP; 1622 } 1623 1624 static const struct net_device_ops ibmvnic_netdev_ops = { 1625 .ndo_open = ibmvnic_open, 1626 .ndo_stop = ibmvnic_close, 1627 .ndo_start_xmit = ibmvnic_xmit, 1628 .ndo_set_rx_mode = ibmvnic_set_multi, 1629 .ndo_set_mac_address = ibmvnic_set_mac, 1630 .ndo_validate_addr = eth_validate_addr, 1631 .ndo_tx_timeout = ibmvnic_tx_timeout, 1632 #ifdef CONFIG_NET_POLL_CONTROLLER 1633 .ndo_poll_controller = ibmvnic_netpoll_controller, 1634 #endif 1635 .ndo_change_mtu = ibmvnic_change_mtu, 1636 }; 1637 1638 /* ethtool functions */ 1639 1640 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1641 struct ethtool_link_ksettings *cmd) 1642 { 1643 u32 supported, advertising; 1644 1645 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1646 SUPPORTED_FIBRE); 1647 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1648 ADVERTISED_FIBRE); 1649 cmd->base.speed = SPEED_1000; 1650 cmd->base.duplex = DUPLEX_FULL; 1651 cmd->base.port = PORT_FIBRE; 1652 cmd->base.phy_address = 0; 1653 cmd->base.autoneg = AUTONEG_ENABLE; 1654 1655 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1656 supported); 1657 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1658 advertising); 1659 1660 return 0; 1661 } 1662 1663 static void ibmvnic_get_drvinfo(struct net_device *dev, 1664 struct ethtool_drvinfo *info) 1665 { 1666 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1667 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1668 } 1669 1670 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1671 { 1672 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1673 1674 return adapter->msg_enable; 1675 } 1676 1677 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1678 { 1679 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1680 1681 adapter->msg_enable = data; 1682 } 1683 1684 static u32 ibmvnic_get_link(struct net_device *netdev) 1685 { 1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1687 1688 /* Don't need to send a query because we request a logical link up at 1689 * init and then we wait for link state indications 1690 */ 1691 return adapter->logical_link_state; 1692 } 1693 1694 static void ibmvnic_get_ringparam(struct net_device *netdev, 1695 struct ethtool_ringparam *ring) 1696 { 1697 ring->rx_max_pending = 0; 1698 ring->tx_max_pending = 0; 1699 ring->rx_mini_max_pending = 0; 1700 ring->rx_jumbo_max_pending = 0; 1701 ring->rx_pending = 0; 1702 ring->tx_pending = 0; 1703 ring->rx_mini_pending = 0; 1704 ring->rx_jumbo_pending = 0; 1705 } 1706 1707 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1708 { 1709 int i; 1710 1711 if (stringset != ETH_SS_STATS) 1712 return; 1713 1714 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1715 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1716 } 1717 1718 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1719 { 1720 switch (sset) { 1721 case ETH_SS_STATS: 1722 return ARRAY_SIZE(ibmvnic_stats); 1723 default: 1724 return -EOPNOTSUPP; 1725 } 1726 } 1727 1728 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1729 struct ethtool_stats *stats, u64 *data) 1730 { 1731 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1732 union ibmvnic_crq crq; 1733 int i; 1734 1735 memset(&crq, 0, sizeof(crq)); 1736 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1737 crq.request_statistics.cmd = REQUEST_STATISTICS; 1738 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1739 crq.request_statistics.len = 1740 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1741 1742 /* Wait for data to be written */ 1743 init_completion(&adapter->stats_done); 1744 ibmvnic_send_crq(adapter, &crq); 1745 wait_for_completion(&adapter->stats_done); 1746 1747 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1748 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1749 } 1750 1751 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1752 .get_drvinfo = ibmvnic_get_drvinfo, 1753 .get_msglevel = ibmvnic_get_msglevel, 1754 .set_msglevel = ibmvnic_set_msglevel, 1755 .get_link = ibmvnic_get_link, 1756 .get_ringparam = ibmvnic_get_ringparam, 1757 .get_strings = ibmvnic_get_strings, 1758 .get_sset_count = ibmvnic_get_sset_count, 1759 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1760 .get_link_ksettings = ibmvnic_get_link_ksettings, 1761 }; 1762 1763 /* Routines for managing CRQs/sCRQs */ 1764 1765 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 1766 struct ibmvnic_sub_crq_queue *scrq) 1767 { 1768 int rc; 1769 1770 if (scrq->irq) { 1771 free_irq(scrq->irq, scrq); 1772 irq_dispose_mapping(scrq->irq); 1773 scrq->irq = 0; 1774 } 1775 1776 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1777 scrq->cur = 0; 1778 1779 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1780 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1781 return rc; 1782 } 1783 1784 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 1785 { 1786 int i, rc; 1787 1788 for (i = 0; i < adapter->req_tx_queues; i++) { 1789 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1790 if (rc) 1791 return rc; 1792 } 1793 1794 for (i = 0; i < adapter->req_rx_queues; i++) { 1795 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1796 if (rc) 1797 return rc; 1798 } 1799 1800 return rc; 1801 } 1802 1803 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1804 struct ibmvnic_sub_crq_queue *scrq) 1805 { 1806 struct device *dev = &adapter->vdev->dev; 1807 long rc; 1808 1809 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1810 1811 /* Close the sub-crqs */ 1812 do { 1813 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1814 adapter->vdev->unit_address, 1815 scrq->crq_num); 1816 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1817 1818 if (rc) { 1819 netdev_err(adapter->netdev, 1820 "Failed to release sub-CRQ %16lx, rc = %ld\n", 1821 scrq->crq_num, rc); 1822 } 1823 1824 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1825 DMA_BIDIRECTIONAL); 1826 free_pages((unsigned long)scrq->msgs, 2); 1827 kfree(scrq); 1828 } 1829 1830 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1831 *adapter) 1832 { 1833 struct device *dev = &adapter->vdev->dev; 1834 struct ibmvnic_sub_crq_queue *scrq; 1835 int rc; 1836 1837 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 1838 if (!scrq) 1839 return NULL; 1840 1841 scrq->msgs = 1842 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 1843 if (!scrq->msgs) { 1844 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1845 goto zero_page_failed; 1846 } 1847 1848 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1849 DMA_BIDIRECTIONAL); 1850 if (dma_mapping_error(dev, scrq->msg_token)) { 1851 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1852 goto map_failed; 1853 } 1854 1855 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1856 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1857 1858 if (rc == H_RESOURCE) 1859 rc = ibmvnic_reset_crq(adapter); 1860 1861 if (rc == H_CLOSED) { 1862 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1863 } else if (rc) { 1864 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1865 goto reg_failed; 1866 } 1867 1868 scrq->adapter = adapter; 1869 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1870 spin_lock_init(&scrq->lock); 1871 1872 netdev_dbg(adapter->netdev, 1873 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1874 scrq->crq_num, scrq->hw_irq, scrq->irq); 1875 1876 return scrq; 1877 1878 reg_failed: 1879 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1880 DMA_BIDIRECTIONAL); 1881 map_failed: 1882 free_pages((unsigned long)scrq->msgs, 2); 1883 zero_page_failed: 1884 kfree(scrq); 1885 1886 return NULL; 1887 } 1888 1889 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1890 { 1891 int i; 1892 1893 if (adapter->tx_scrq) { 1894 for (i = 0; i < adapter->req_tx_queues; i++) { 1895 if (!adapter->tx_scrq[i]) 1896 continue; 1897 1898 if (adapter->tx_scrq[i]->irq) { 1899 free_irq(adapter->tx_scrq[i]->irq, 1900 adapter->tx_scrq[i]); 1901 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1902 adapter->tx_scrq[i]->irq = 0; 1903 } 1904 1905 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1906 } 1907 1908 kfree(adapter->tx_scrq); 1909 adapter->tx_scrq = NULL; 1910 } 1911 1912 if (adapter->rx_scrq) { 1913 for (i = 0; i < adapter->req_rx_queues; i++) { 1914 if (!adapter->rx_scrq[i]) 1915 continue; 1916 1917 if (adapter->rx_scrq[i]->irq) { 1918 free_irq(adapter->rx_scrq[i]->irq, 1919 adapter->rx_scrq[i]); 1920 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1921 adapter->rx_scrq[i]->irq = 0; 1922 } 1923 1924 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1925 } 1926 1927 kfree(adapter->rx_scrq); 1928 adapter->rx_scrq = NULL; 1929 } 1930 } 1931 1932 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1933 struct ibmvnic_sub_crq_queue *scrq) 1934 { 1935 struct device *dev = &adapter->vdev->dev; 1936 unsigned long rc; 1937 1938 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1939 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1940 if (rc) 1941 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1942 scrq->hw_irq, rc); 1943 return rc; 1944 } 1945 1946 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1947 struct ibmvnic_sub_crq_queue *scrq) 1948 { 1949 struct device *dev = &adapter->vdev->dev; 1950 unsigned long rc; 1951 1952 if (scrq->hw_irq > 0x100000000ULL) { 1953 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1954 return 1; 1955 } 1956 1957 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1958 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1959 if (rc) 1960 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1961 scrq->hw_irq, rc); 1962 return rc; 1963 } 1964 1965 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1966 struct ibmvnic_sub_crq_queue *scrq) 1967 { 1968 struct device *dev = &adapter->vdev->dev; 1969 struct ibmvnic_tx_buff *txbuff; 1970 union sub_crq *next; 1971 int index; 1972 int i, j; 1973 u8 first; 1974 1975 restart_loop: 1976 while (pending_scrq(adapter, scrq)) { 1977 unsigned int pool = scrq->pool_index; 1978 1979 next = ibmvnic_next_scrq(adapter, scrq); 1980 for (i = 0; i < next->tx_comp.num_comps; i++) { 1981 if (next->tx_comp.rcs[i]) { 1982 dev_err(dev, "tx error %x\n", 1983 next->tx_comp.rcs[i]); 1984 continue; 1985 } 1986 index = be32_to_cpu(next->tx_comp.correlators[i]); 1987 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1988 1989 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1990 if (!txbuff->data_dma[j]) 1991 continue; 1992 1993 txbuff->data_dma[j] = 0; 1994 } 1995 /* if sub_crq was sent indirectly */ 1996 first = txbuff->indir_arr[0].generic.first; 1997 if (first == IBMVNIC_CRQ_CMD) { 1998 dma_unmap_single(dev, txbuff->indir_dma, 1999 sizeof(txbuff->indir_arr), 2000 DMA_TO_DEVICE); 2001 } 2002 2003 if (txbuff->last_frag) { 2004 dev_kfree_skb_any(txbuff->skb); 2005 txbuff->skb = NULL; 2006 } 2007 2008 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2009 producer_index] = index; 2010 adapter->tx_pool[pool].producer_index = 2011 (adapter->tx_pool[pool].producer_index + 1) % 2012 adapter->req_tx_entries_per_subcrq; 2013 } 2014 /* remove tx_comp scrq*/ 2015 next->tx_comp.first = 0; 2016 2017 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 2018 (adapter->req_tx_entries_per_subcrq / 2) && 2019 __netif_subqueue_stopped(adapter->netdev, 2020 scrq->pool_index)) { 2021 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2022 netdev_info(adapter->netdev, "Started queue %d\n", 2023 scrq->pool_index); 2024 } 2025 } 2026 2027 enable_scrq_irq(adapter, scrq); 2028 2029 if (pending_scrq(adapter, scrq)) { 2030 disable_scrq_irq(adapter, scrq); 2031 goto restart_loop; 2032 } 2033 2034 return 0; 2035 } 2036 2037 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2038 { 2039 struct ibmvnic_sub_crq_queue *scrq = instance; 2040 struct ibmvnic_adapter *adapter = scrq->adapter; 2041 2042 disable_scrq_irq(adapter, scrq); 2043 ibmvnic_complete_tx(adapter, scrq); 2044 2045 return IRQ_HANDLED; 2046 } 2047 2048 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2049 { 2050 struct ibmvnic_sub_crq_queue *scrq = instance; 2051 struct ibmvnic_adapter *adapter = scrq->adapter; 2052 2053 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2054 disable_scrq_irq(adapter, scrq); 2055 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2056 } 2057 2058 return IRQ_HANDLED; 2059 } 2060 2061 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2062 { 2063 struct device *dev = &adapter->vdev->dev; 2064 struct ibmvnic_sub_crq_queue *scrq; 2065 int i = 0, j = 0; 2066 int rc = 0; 2067 2068 for (i = 0; i < adapter->req_tx_queues; i++) { 2069 scrq = adapter->tx_scrq[i]; 2070 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2071 2072 if (!scrq->irq) { 2073 rc = -EINVAL; 2074 dev_err(dev, "Error mapping irq\n"); 2075 goto req_tx_irq_failed; 2076 } 2077 2078 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2079 0, "ibmvnic_tx", scrq); 2080 2081 if (rc) { 2082 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2083 scrq->irq, rc); 2084 irq_dispose_mapping(scrq->irq); 2085 goto req_rx_irq_failed; 2086 } 2087 } 2088 2089 for (i = 0; i < adapter->req_rx_queues; i++) { 2090 scrq = adapter->rx_scrq[i]; 2091 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2092 if (!scrq->irq) { 2093 rc = -EINVAL; 2094 dev_err(dev, "Error mapping irq\n"); 2095 goto req_rx_irq_failed; 2096 } 2097 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2098 0, "ibmvnic_rx", scrq); 2099 if (rc) { 2100 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2101 scrq->irq, rc); 2102 irq_dispose_mapping(scrq->irq); 2103 goto req_rx_irq_failed; 2104 } 2105 } 2106 return rc; 2107 2108 req_rx_irq_failed: 2109 for (j = 0; j < i; j++) { 2110 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2111 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2112 } 2113 i = adapter->req_tx_queues; 2114 req_tx_irq_failed: 2115 for (j = 0; j < i; j++) { 2116 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2117 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2118 } 2119 release_sub_crqs(adapter); 2120 return rc; 2121 } 2122 2123 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2124 { 2125 struct device *dev = &adapter->vdev->dev; 2126 struct ibmvnic_sub_crq_queue **allqueues; 2127 int registered_queues = 0; 2128 int total_queues; 2129 int more = 0; 2130 int i; 2131 2132 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2133 2134 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2135 if (!allqueues) 2136 return -1; 2137 2138 for (i = 0; i < total_queues; i++) { 2139 allqueues[i] = init_sub_crq_queue(adapter); 2140 if (!allqueues[i]) { 2141 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2142 break; 2143 } 2144 registered_queues++; 2145 } 2146 2147 /* Make sure we were able to register the minimum number of queues */ 2148 if (registered_queues < 2149 adapter->min_tx_queues + adapter->min_rx_queues) { 2150 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2151 goto tx_failed; 2152 } 2153 2154 /* Distribute the failed allocated queues*/ 2155 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2156 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2157 switch (i % 3) { 2158 case 0: 2159 if (adapter->req_rx_queues > adapter->min_rx_queues) 2160 adapter->req_rx_queues--; 2161 else 2162 more++; 2163 break; 2164 case 1: 2165 if (adapter->req_tx_queues > adapter->min_tx_queues) 2166 adapter->req_tx_queues--; 2167 else 2168 more++; 2169 break; 2170 } 2171 } 2172 2173 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2174 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2175 if (!adapter->tx_scrq) 2176 goto tx_failed; 2177 2178 for (i = 0; i < adapter->req_tx_queues; i++) { 2179 adapter->tx_scrq[i] = allqueues[i]; 2180 adapter->tx_scrq[i]->pool_index = i; 2181 } 2182 2183 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2184 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2185 if (!adapter->rx_scrq) 2186 goto rx_failed; 2187 2188 for (i = 0; i < adapter->req_rx_queues; i++) { 2189 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2190 adapter->rx_scrq[i]->scrq_num = i; 2191 } 2192 2193 kfree(allqueues); 2194 return 0; 2195 2196 rx_failed: 2197 kfree(adapter->tx_scrq); 2198 adapter->tx_scrq = NULL; 2199 tx_failed: 2200 for (i = 0; i < registered_queues; i++) 2201 release_sub_crq_queue(adapter, allqueues[i]); 2202 kfree(allqueues); 2203 return -1; 2204 } 2205 2206 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2207 { 2208 struct device *dev = &adapter->vdev->dev; 2209 union ibmvnic_crq crq; 2210 2211 if (!retry) { 2212 /* Sub-CRQ entries are 32 byte long */ 2213 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2214 2215 if (adapter->min_tx_entries_per_subcrq > entries_page || 2216 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2217 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2218 return; 2219 } 2220 2221 /* Get the minimum between the queried max and the entries 2222 * that fit in our PAGE_SIZE 2223 */ 2224 adapter->req_tx_entries_per_subcrq = 2225 adapter->max_tx_entries_per_subcrq > entries_page ? 2226 entries_page : adapter->max_tx_entries_per_subcrq; 2227 adapter->req_rx_add_entries_per_subcrq = 2228 adapter->max_rx_add_entries_per_subcrq > entries_page ? 2229 entries_page : adapter->max_rx_add_entries_per_subcrq; 2230 2231 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 2232 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 2233 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2234 2235 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2236 } 2237 2238 memset(&crq, 0, sizeof(crq)); 2239 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2240 crq.request_capability.cmd = REQUEST_CAPABILITY; 2241 2242 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2243 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2244 atomic_inc(&adapter->running_cap_crqs); 2245 ibmvnic_send_crq(adapter, &crq); 2246 2247 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2248 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2249 atomic_inc(&adapter->running_cap_crqs); 2250 ibmvnic_send_crq(adapter, &crq); 2251 2252 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2253 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2254 atomic_inc(&adapter->running_cap_crqs); 2255 ibmvnic_send_crq(adapter, &crq); 2256 2257 crq.request_capability.capability = 2258 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2259 crq.request_capability.number = 2260 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2261 atomic_inc(&adapter->running_cap_crqs); 2262 ibmvnic_send_crq(adapter, &crq); 2263 2264 crq.request_capability.capability = 2265 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2266 crq.request_capability.number = 2267 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2268 atomic_inc(&adapter->running_cap_crqs); 2269 ibmvnic_send_crq(adapter, &crq); 2270 2271 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2272 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2273 atomic_inc(&adapter->running_cap_crqs); 2274 ibmvnic_send_crq(adapter, &crq); 2275 2276 if (adapter->netdev->flags & IFF_PROMISC) { 2277 if (adapter->promisc_supported) { 2278 crq.request_capability.capability = 2279 cpu_to_be16(PROMISC_REQUESTED); 2280 crq.request_capability.number = cpu_to_be64(1); 2281 atomic_inc(&adapter->running_cap_crqs); 2282 ibmvnic_send_crq(adapter, &crq); 2283 } 2284 } else { 2285 crq.request_capability.capability = 2286 cpu_to_be16(PROMISC_REQUESTED); 2287 crq.request_capability.number = cpu_to_be64(0); 2288 atomic_inc(&adapter->running_cap_crqs); 2289 ibmvnic_send_crq(adapter, &crq); 2290 } 2291 } 2292 2293 static int pending_scrq(struct ibmvnic_adapter *adapter, 2294 struct ibmvnic_sub_crq_queue *scrq) 2295 { 2296 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2297 2298 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2299 return 1; 2300 else 2301 return 0; 2302 } 2303 2304 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2305 struct ibmvnic_sub_crq_queue *scrq) 2306 { 2307 union sub_crq *entry; 2308 unsigned long flags; 2309 2310 spin_lock_irqsave(&scrq->lock, flags); 2311 entry = &scrq->msgs[scrq->cur]; 2312 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2313 if (++scrq->cur == scrq->size) 2314 scrq->cur = 0; 2315 } else { 2316 entry = NULL; 2317 } 2318 spin_unlock_irqrestore(&scrq->lock, flags); 2319 2320 return entry; 2321 } 2322 2323 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2324 { 2325 struct ibmvnic_crq_queue *queue = &adapter->crq; 2326 union ibmvnic_crq *crq; 2327 2328 crq = &queue->msgs[queue->cur]; 2329 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2330 if (++queue->cur == queue->size) 2331 queue->cur = 0; 2332 } else { 2333 crq = NULL; 2334 } 2335 2336 return crq; 2337 } 2338 2339 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2340 union sub_crq *sub_crq) 2341 { 2342 unsigned int ua = adapter->vdev->unit_address; 2343 struct device *dev = &adapter->vdev->dev; 2344 u64 *u64_crq = (u64 *)sub_crq; 2345 int rc; 2346 2347 netdev_dbg(adapter->netdev, 2348 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2349 (unsigned long int)cpu_to_be64(remote_handle), 2350 (unsigned long int)cpu_to_be64(u64_crq[0]), 2351 (unsigned long int)cpu_to_be64(u64_crq[1]), 2352 (unsigned long int)cpu_to_be64(u64_crq[2]), 2353 (unsigned long int)cpu_to_be64(u64_crq[3])); 2354 2355 /* Make sure the hypervisor sees the complete request */ 2356 mb(); 2357 2358 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2359 cpu_to_be64(remote_handle), 2360 cpu_to_be64(u64_crq[0]), 2361 cpu_to_be64(u64_crq[1]), 2362 cpu_to_be64(u64_crq[2]), 2363 cpu_to_be64(u64_crq[3])); 2364 2365 if (rc) { 2366 if (rc == H_CLOSED) 2367 dev_warn(dev, "CRQ Queue closed\n"); 2368 dev_err(dev, "Send error (rc=%d)\n", rc); 2369 } 2370 2371 return rc; 2372 } 2373 2374 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2375 u64 remote_handle, u64 ioba, u64 num_entries) 2376 { 2377 unsigned int ua = adapter->vdev->unit_address; 2378 struct device *dev = &adapter->vdev->dev; 2379 int rc; 2380 2381 /* Make sure the hypervisor sees the complete request */ 2382 mb(); 2383 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2384 cpu_to_be64(remote_handle), 2385 ioba, num_entries); 2386 2387 if (rc) { 2388 if (rc == H_CLOSED) 2389 dev_warn(dev, "CRQ Queue closed\n"); 2390 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2391 } 2392 2393 return rc; 2394 } 2395 2396 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2397 union ibmvnic_crq *crq) 2398 { 2399 unsigned int ua = adapter->vdev->unit_address; 2400 struct device *dev = &adapter->vdev->dev; 2401 u64 *u64_crq = (u64 *)crq; 2402 int rc; 2403 2404 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2405 (unsigned long int)cpu_to_be64(u64_crq[0]), 2406 (unsigned long int)cpu_to_be64(u64_crq[1])); 2407 2408 /* Make sure the hypervisor sees the complete request */ 2409 mb(); 2410 2411 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2412 cpu_to_be64(u64_crq[0]), 2413 cpu_to_be64(u64_crq[1])); 2414 2415 if (rc) { 2416 if (rc == H_CLOSED) 2417 dev_warn(dev, "CRQ Queue closed\n"); 2418 dev_warn(dev, "Send error (rc=%d)\n", rc); 2419 } 2420 2421 return rc; 2422 } 2423 2424 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2425 { 2426 union ibmvnic_crq crq; 2427 2428 memset(&crq, 0, sizeof(crq)); 2429 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2430 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2431 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2432 2433 return ibmvnic_send_crq(adapter, &crq); 2434 } 2435 2436 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2437 { 2438 union ibmvnic_crq crq; 2439 2440 memset(&crq, 0, sizeof(crq)); 2441 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2442 crq.version_exchange.cmd = VERSION_EXCHANGE; 2443 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2444 2445 return ibmvnic_send_crq(adapter, &crq); 2446 } 2447 2448 static void send_login(struct ibmvnic_adapter *adapter) 2449 { 2450 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2451 struct ibmvnic_login_buffer *login_buffer; 2452 struct device *dev = &adapter->vdev->dev; 2453 dma_addr_t rsp_buffer_token; 2454 dma_addr_t buffer_token; 2455 size_t rsp_buffer_size; 2456 union ibmvnic_crq crq; 2457 size_t buffer_size; 2458 __be64 *tx_list_p; 2459 __be64 *rx_list_p; 2460 int i; 2461 2462 buffer_size = 2463 sizeof(struct ibmvnic_login_buffer) + 2464 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 2465 2466 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 2467 if (!login_buffer) 2468 goto buf_alloc_failed; 2469 2470 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2471 DMA_TO_DEVICE); 2472 if (dma_mapping_error(dev, buffer_token)) { 2473 dev_err(dev, "Couldn't map login buffer\n"); 2474 goto buf_map_failed; 2475 } 2476 2477 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2478 sizeof(u64) * adapter->req_tx_queues + 2479 sizeof(u64) * adapter->req_rx_queues + 2480 sizeof(u64) * adapter->req_rx_queues + 2481 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2482 2483 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2484 if (!login_rsp_buffer) 2485 goto buf_rsp_alloc_failed; 2486 2487 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2488 rsp_buffer_size, DMA_FROM_DEVICE); 2489 if (dma_mapping_error(dev, rsp_buffer_token)) { 2490 dev_err(dev, "Couldn't map login rsp buffer\n"); 2491 goto buf_rsp_map_failed; 2492 } 2493 2494 adapter->login_buf = login_buffer; 2495 adapter->login_buf_token = buffer_token; 2496 adapter->login_buf_sz = buffer_size; 2497 adapter->login_rsp_buf = login_rsp_buffer; 2498 adapter->login_rsp_buf_token = rsp_buffer_token; 2499 adapter->login_rsp_buf_sz = rsp_buffer_size; 2500 2501 login_buffer->len = cpu_to_be32(buffer_size); 2502 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2503 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2504 login_buffer->off_txcomp_subcrqs = 2505 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2506 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2507 login_buffer->off_rxcomp_subcrqs = 2508 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2509 sizeof(u64) * adapter->req_tx_queues); 2510 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2511 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2512 2513 tx_list_p = (__be64 *)((char *)login_buffer + 2514 sizeof(struct ibmvnic_login_buffer)); 2515 rx_list_p = (__be64 *)((char *)login_buffer + 2516 sizeof(struct ibmvnic_login_buffer) + 2517 sizeof(u64) * adapter->req_tx_queues); 2518 2519 for (i = 0; i < adapter->req_tx_queues; i++) { 2520 if (adapter->tx_scrq[i]) { 2521 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2522 crq_num); 2523 } 2524 } 2525 2526 for (i = 0; i < adapter->req_rx_queues; i++) { 2527 if (adapter->rx_scrq[i]) { 2528 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2529 crq_num); 2530 } 2531 } 2532 2533 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2534 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2535 netdev_dbg(adapter->netdev, "%016lx\n", 2536 ((unsigned long int *)(adapter->login_buf))[i]); 2537 } 2538 2539 memset(&crq, 0, sizeof(crq)); 2540 crq.login.first = IBMVNIC_CRQ_CMD; 2541 crq.login.cmd = LOGIN; 2542 crq.login.ioba = cpu_to_be32(buffer_token); 2543 crq.login.len = cpu_to_be32(buffer_size); 2544 ibmvnic_send_crq(adapter, &crq); 2545 2546 return; 2547 2548 buf_rsp_map_failed: 2549 kfree(login_rsp_buffer); 2550 buf_rsp_alloc_failed: 2551 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2552 buf_map_failed: 2553 kfree(login_buffer); 2554 buf_alloc_failed: 2555 return; 2556 } 2557 2558 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2559 u32 len, u8 map_id) 2560 { 2561 union ibmvnic_crq crq; 2562 2563 memset(&crq, 0, sizeof(crq)); 2564 crq.request_map.first = IBMVNIC_CRQ_CMD; 2565 crq.request_map.cmd = REQUEST_MAP; 2566 crq.request_map.map_id = map_id; 2567 crq.request_map.ioba = cpu_to_be32(addr); 2568 crq.request_map.len = cpu_to_be32(len); 2569 ibmvnic_send_crq(adapter, &crq); 2570 } 2571 2572 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2573 { 2574 union ibmvnic_crq crq; 2575 2576 memset(&crq, 0, sizeof(crq)); 2577 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2578 crq.request_unmap.cmd = REQUEST_UNMAP; 2579 crq.request_unmap.map_id = map_id; 2580 ibmvnic_send_crq(adapter, &crq); 2581 } 2582 2583 static void send_map_query(struct ibmvnic_adapter *adapter) 2584 { 2585 union ibmvnic_crq crq; 2586 2587 memset(&crq, 0, sizeof(crq)); 2588 crq.query_map.first = IBMVNIC_CRQ_CMD; 2589 crq.query_map.cmd = QUERY_MAP; 2590 ibmvnic_send_crq(adapter, &crq); 2591 } 2592 2593 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2594 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2595 { 2596 union ibmvnic_crq crq; 2597 2598 atomic_set(&adapter->running_cap_crqs, 0); 2599 memset(&crq, 0, sizeof(crq)); 2600 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2601 crq.query_capability.cmd = QUERY_CAPABILITY; 2602 2603 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2604 atomic_inc(&adapter->running_cap_crqs); 2605 ibmvnic_send_crq(adapter, &crq); 2606 2607 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2608 atomic_inc(&adapter->running_cap_crqs); 2609 ibmvnic_send_crq(adapter, &crq); 2610 2611 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2612 atomic_inc(&adapter->running_cap_crqs); 2613 ibmvnic_send_crq(adapter, &crq); 2614 2615 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2616 atomic_inc(&adapter->running_cap_crqs); 2617 ibmvnic_send_crq(adapter, &crq); 2618 2619 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2620 atomic_inc(&adapter->running_cap_crqs); 2621 ibmvnic_send_crq(adapter, &crq); 2622 2623 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2624 atomic_inc(&adapter->running_cap_crqs); 2625 ibmvnic_send_crq(adapter, &crq); 2626 2627 crq.query_capability.capability = 2628 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2629 atomic_inc(&adapter->running_cap_crqs); 2630 ibmvnic_send_crq(adapter, &crq); 2631 2632 crq.query_capability.capability = 2633 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2634 atomic_inc(&adapter->running_cap_crqs); 2635 ibmvnic_send_crq(adapter, &crq); 2636 2637 crq.query_capability.capability = 2638 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2639 atomic_inc(&adapter->running_cap_crqs); 2640 ibmvnic_send_crq(adapter, &crq); 2641 2642 crq.query_capability.capability = 2643 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2644 atomic_inc(&adapter->running_cap_crqs); 2645 ibmvnic_send_crq(adapter, &crq); 2646 2647 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2648 atomic_inc(&adapter->running_cap_crqs); 2649 ibmvnic_send_crq(adapter, &crq); 2650 2651 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2652 atomic_inc(&adapter->running_cap_crqs); 2653 ibmvnic_send_crq(adapter, &crq); 2654 2655 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2656 atomic_inc(&adapter->running_cap_crqs); 2657 ibmvnic_send_crq(adapter, &crq); 2658 2659 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2660 atomic_inc(&adapter->running_cap_crqs); 2661 ibmvnic_send_crq(adapter, &crq); 2662 2663 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2664 atomic_inc(&adapter->running_cap_crqs); 2665 ibmvnic_send_crq(adapter, &crq); 2666 2667 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2668 atomic_inc(&adapter->running_cap_crqs); 2669 ibmvnic_send_crq(adapter, &crq); 2670 2671 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 2672 atomic_inc(&adapter->running_cap_crqs); 2673 ibmvnic_send_crq(adapter, &crq); 2674 2675 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2676 atomic_inc(&adapter->running_cap_crqs); 2677 ibmvnic_send_crq(adapter, &crq); 2678 2679 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2680 atomic_inc(&adapter->running_cap_crqs); 2681 ibmvnic_send_crq(adapter, &crq); 2682 2683 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2684 atomic_inc(&adapter->running_cap_crqs); 2685 ibmvnic_send_crq(adapter, &crq); 2686 2687 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2688 atomic_inc(&adapter->running_cap_crqs); 2689 ibmvnic_send_crq(adapter, &crq); 2690 2691 crq.query_capability.capability = 2692 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2693 atomic_inc(&adapter->running_cap_crqs); 2694 ibmvnic_send_crq(adapter, &crq); 2695 2696 crq.query_capability.capability = 2697 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2698 atomic_inc(&adapter->running_cap_crqs); 2699 ibmvnic_send_crq(adapter, &crq); 2700 2701 crq.query_capability.capability = 2702 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2703 atomic_inc(&adapter->running_cap_crqs); 2704 ibmvnic_send_crq(adapter, &crq); 2705 2706 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2707 atomic_inc(&adapter->running_cap_crqs); 2708 ibmvnic_send_crq(adapter, &crq); 2709 } 2710 2711 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2712 { 2713 struct device *dev = &adapter->vdev->dev; 2714 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2715 union ibmvnic_crq crq; 2716 int i; 2717 2718 dma_unmap_single(dev, adapter->ip_offload_tok, 2719 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2720 2721 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2722 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2723 netdev_dbg(adapter->netdev, "%016lx\n", 2724 ((unsigned long int *)(buf))[i]); 2725 2726 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2727 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2728 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2729 buf->tcp_ipv4_chksum); 2730 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2731 buf->tcp_ipv6_chksum); 2732 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2733 buf->udp_ipv4_chksum); 2734 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2735 buf->udp_ipv6_chksum); 2736 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2737 buf->large_tx_ipv4); 2738 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2739 buf->large_tx_ipv6); 2740 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2741 buf->large_rx_ipv4); 2742 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2743 buf->large_rx_ipv6); 2744 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2745 buf->max_ipv4_header_size); 2746 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2747 buf->max_ipv6_header_size); 2748 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2749 buf->max_tcp_header_size); 2750 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2751 buf->max_udp_header_size); 2752 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2753 buf->max_large_tx_size); 2754 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2755 buf->max_large_rx_size); 2756 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2757 buf->ipv6_extension_header); 2758 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2759 buf->tcp_pseudosum_req); 2760 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2761 buf->num_ipv6_ext_headers); 2762 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2763 buf->off_ipv6_ext_headers); 2764 2765 adapter->ip_offload_ctrl_tok = 2766 dma_map_single(dev, &adapter->ip_offload_ctrl, 2767 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2768 2769 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2770 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2771 return; 2772 } 2773 2774 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2775 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2776 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2777 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2778 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2779 2780 /* large_tx/rx disabled for now, additional features needed */ 2781 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2782 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2783 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2784 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2785 2786 adapter->netdev->features = NETIF_F_GSO; 2787 2788 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2789 adapter->netdev->features |= NETIF_F_IP_CSUM; 2790 2791 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2792 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2793 2794 if ((adapter->netdev->features & 2795 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2796 adapter->netdev->features |= NETIF_F_RXCSUM; 2797 2798 memset(&crq, 0, sizeof(crq)); 2799 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2800 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2801 crq.control_ip_offload.len = 2802 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2803 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2804 ibmvnic_send_crq(adapter, &crq); 2805 } 2806 2807 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2808 struct ibmvnic_adapter *adapter) 2809 { 2810 struct device *dev = &adapter->vdev->dev; 2811 struct ibmvnic_error_buff *error_buff, *tmp; 2812 unsigned long flags; 2813 bool found = false; 2814 int i; 2815 2816 if (!crq->request_error_rsp.rc.code) { 2817 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2818 crq->request_error_rsp.rc.code); 2819 return; 2820 } 2821 2822 spin_lock_irqsave(&adapter->error_list_lock, flags); 2823 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2824 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2825 found = true; 2826 list_del(&error_buff->list); 2827 break; 2828 } 2829 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2830 2831 if (!found) { 2832 dev_err(dev, "Couldn't find error id %x\n", 2833 be32_to_cpu(crq->request_error_rsp.error_id)); 2834 return; 2835 } 2836 2837 dev_err(dev, "Detailed info for error id %x:", 2838 be32_to_cpu(crq->request_error_rsp.error_id)); 2839 2840 for (i = 0; i < error_buff->len; i++) { 2841 pr_cont("%02x", (int)error_buff->buff[i]); 2842 if (i % 8 == 7) 2843 pr_cont(" "); 2844 } 2845 pr_cont("\n"); 2846 2847 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2848 DMA_FROM_DEVICE); 2849 kfree(error_buff->buff); 2850 kfree(error_buff); 2851 } 2852 2853 static void request_error_information(struct ibmvnic_adapter *adapter, 2854 union ibmvnic_crq *err_crq) 2855 { 2856 struct device *dev = &adapter->vdev->dev; 2857 struct net_device *netdev = adapter->netdev; 2858 struct ibmvnic_error_buff *error_buff; 2859 unsigned long timeout = msecs_to_jiffies(30000); 2860 union ibmvnic_crq crq; 2861 unsigned long flags; 2862 int rc, detail_len; 2863 2864 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2865 if (!error_buff) 2866 return; 2867 2868 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 2869 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2870 if (!error_buff->buff) { 2871 kfree(error_buff); 2872 return; 2873 } 2874 2875 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2876 DMA_FROM_DEVICE); 2877 if (dma_mapping_error(dev, error_buff->dma)) { 2878 netdev_err(netdev, "Couldn't map error buffer\n"); 2879 kfree(error_buff->buff); 2880 kfree(error_buff); 2881 return; 2882 } 2883 2884 error_buff->len = detail_len; 2885 error_buff->error_id = err_crq->error_indication.error_id; 2886 2887 spin_lock_irqsave(&adapter->error_list_lock, flags); 2888 list_add_tail(&error_buff->list, &adapter->errors); 2889 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2890 2891 memset(&crq, 0, sizeof(crq)); 2892 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2893 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2894 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2895 crq.request_error_info.len = cpu_to_be32(detail_len); 2896 crq.request_error_info.error_id = err_crq->error_indication.error_id; 2897 2898 rc = ibmvnic_send_crq(adapter, &crq); 2899 if (rc) { 2900 netdev_err(netdev, "failed to request error information\n"); 2901 goto err_info_fail; 2902 } 2903 2904 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2905 netdev_err(netdev, "timeout waiting for error information\n"); 2906 goto err_info_fail; 2907 } 2908 2909 return; 2910 2911 err_info_fail: 2912 spin_lock_irqsave(&adapter->error_list_lock, flags); 2913 list_del(&error_buff->list); 2914 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2915 2916 kfree(error_buff->buff); 2917 kfree(error_buff); 2918 } 2919 2920 static void handle_error_indication(union ibmvnic_crq *crq, 2921 struct ibmvnic_adapter *adapter) 2922 { 2923 struct device *dev = &adapter->vdev->dev; 2924 2925 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2926 crq->error_indication.flags 2927 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2928 be32_to_cpu(crq->error_indication.error_id), 2929 be16_to_cpu(crq->error_indication.error_cause)); 2930 2931 if (be32_to_cpu(crq->error_indication.error_id)) 2932 request_error_information(adapter, crq); 2933 2934 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 2935 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2936 else 2937 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 2938 } 2939 2940 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2941 struct ibmvnic_adapter *adapter) 2942 { 2943 struct net_device *netdev = adapter->netdev; 2944 struct device *dev = &adapter->vdev->dev; 2945 long rc; 2946 2947 rc = crq->change_mac_addr_rsp.rc.code; 2948 if (rc) { 2949 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2950 return; 2951 } 2952 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2953 ETH_ALEN); 2954 } 2955 2956 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2957 struct ibmvnic_adapter *adapter) 2958 { 2959 struct device *dev = &adapter->vdev->dev; 2960 u64 *req_value; 2961 char *name; 2962 2963 atomic_dec(&adapter->running_cap_crqs); 2964 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2965 case REQ_TX_QUEUES: 2966 req_value = &adapter->req_tx_queues; 2967 name = "tx"; 2968 break; 2969 case REQ_RX_QUEUES: 2970 req_value = &adapter->req_rx_queues; 2971 name = "rx"; 2972 break; 2973 case REQ_RX_ADD_QUEUES: 2974 req_value = &adapter->req_rx_add_queues; 2975 name = "rx_add"; 2976 break; 2977 case REQ_TX_ENTRIES_PER_SUBCRQ: 2978 req_value = &adapter->req_tx_entries_per_subcrq; 2979 name = "tx_entries_per_subcrq"; 2980 break; 2981 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2982 req_value = &adapter->req_rx_add_entries_per_subcrq; 2983 name = "rx_add_entries_per_subcrq"; 2984 break; 2985 case REQ_MTU: 2986 req_value = &adapter->req_mtu; 2987 name = "mtu"; 2988 break; 2989 case PROMISC_REQUESTED: 2990 req_value = &adapter->promisc; 2991 name = "promisc"; 2992 break; 2993 default: 2994 dev_err(dev, "Got invalid cap request rsp %d\n", 2995 crq->request_capability.capability); 2996 return; 2997 } 2998 2999 switch (crq->request_capability_rsp.rc.code) { 3000 case SUCCESS: 3001 break; 3002 case PARTIALSUCCESS: 3003 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3004 *req_value, 3005 (long int)be64_to_cpu(crq->request_capability_rsp. 3006 number), name); 3007 release_sub_crqs(adapter); 3008 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 3009 ibmvnic_send_req_caps(adapter, 1); 3010 return; 3011 default: 3012 dev_err(dev, "Error %d in request cap rsp\n", 3013 crq->request_capability_rsp.rc.code); 3014 return; 3015 } 3016 3017 /* Done receiving requested capabilities, query IP offload support */ 3018 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3019 union ibmvnic_crq newcrq; 3020 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3021 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3022 &adapter->ip_offload_buf; 3023 3024 adapter->wait_capability = false; 3025 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3026 buf_sz, 3027 DMA_FROM_DEVICE); 3028 3029 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3030 if (!firmware_has_feature(FW_FEATURE_CMO)) 3031 dev_err(dev, "Couldn't map offload buffer\n"); 3032 return; 3033 } 3034 3035 memset(&newcrq, 0, sizeof(newcrq)); 3036 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3037 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3038 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3039 newcrq.query_ip_offload.ioba = 3040 cpu_to_be32(adapter->ip_offload_tok); 3041 3042 ibmvnic_send_crq(adapter, &newcrq); 3043 } 3044 } 3045 3046 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3047 struct ibmvnic_adapter *adapter) 3048 { 3049 struct device *dev = &adapter->vdev->dev; 3050 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3051 struct ibmvnic_login_buffer *login = adapter->login_buf; 3052 int i; 3053 3054 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3055 DMA_BIDIRECTIONAL); 3056 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3057 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3058 3059 /* If the number of queues requested can't be allocated by the 3060 * server, the login response will return with code 1. We will need 3061 * to resend the login buffer with fewer queues requested. 3062 */ 3063 if (login_rsp_crq->generic.rc.code) { 3064 adapter->renegotiate = true; 3065 complete(&adapter->init_done); 3066 return 0; 3067 } 3068 3069 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3070 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3071 netdev_dbg(adapter->netdev, "%016lx\n", 3072 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3073 } 3074 3075 /* Sanity checks */ 3076 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3077 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3078 adapter->req_rx_add_queues != 3079 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3080 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3081 ibmvnic_remove(adapter->vdev); 3082 return -EIO; 3083 } 3084 complete(&adapter->init_done); 3085 3086 return 0; 3087 } 3088 3089 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3090 struct ibmvnic_adapter *adapter) 3091 { 3092 struct device *dev = &adapter->vdev->dev; 3093 long rc; 3094 3095 rc = crq->request_unmap_rsp.rc.code; 3096 if (rc) 3097 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3098 } 3099 3100 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3101 struct ibmvnic_adapter *adapter) 3102 { 3103 struct net_device *netdev = adapter->netdev; 3104 struct device *dev = &adapter->vdev->dev; 3105 long rc; 3106 3107 rc = crq->query_map_rsp.rc.code; 3108 if (rc) { 3109 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3110 return; 3111 } 3112 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3113 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3114 crq->query_map_rsp.free_pages); 3115 } 3116 3117 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3118 struct ibmvnic_adapter *adapter) 3119 { 3120 struct net_device *netdev = adapter->netdev; 3121 struct device *dev = &adapter->vdev->dev; 3122 long rc; 3123 3124 atomic_dec(&adapter->running_cap_crqs); 3125 netdev_dbg(netdev, "Outstanding queries: %d\n", 3126 atomic_read(&adapter->running_cap_crqs)); 3127 rc = crq->query_capability.rc.code; 3128 if (rc) { 3129 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3130 goto out; 3131 } 3132 3133 switch (be16_to_cpu(crq->query_capability.capability)) { 3134 case MIN_TX_QUEUES: 3135 adapter->min_tx_queues = 3136 be64_to_cpu(crq->query_capability.number); 3137 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3138 adapter->min_tx_queues); 3139 break; 3140 case MIN_RX_QUEUES: 3141 adapter->min_rx_queues = 3142 be64_to_cpu(crq->query_capability.number); 3143 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3144 adapter->min_rx_queues); 3145 break; 3146 case MIN_RX_ADD_QUEUES: 3147 adapter->min_rx_add_queues = 3148 be64_to_cpu(crq->query_capability.number); 3149 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3150 adapter->min_rx_add_queues); 3151 break; 3152 case MAX_TX_QUEUES: 3153 adapter->max_tx_queues = 3154 be64_to_cpu(crq->query_capability.number); 3155 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3156 adapter->max_tx_queues); 3157 break; 3158 case MAX_RX_QUEUES: 3159 adapter->max_rx_queues = 3160 be64_to_cpu(crq->query_capability.number); 3161 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3162 adapter->max_rx_queues); 3163 break; 3164 case MAX_RX_ADD_QUEUES: 3165 adapter->max_rx_add_queues = 3166 be64_to_cpu(crq->query_capability.number); 3167 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3168 adapter->max_rx_add_queues); 3169 break; 3170 case MIN_TX_ENTRIES_PER_SUBCRQ: 3171 adapter->min_tx_entries_per_subcrq = 3172 be64_to_cpu(crq->query_capability.number); 3173 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3174 adapter->min_tx_entries_per_subcrq); 3175 break; 3176 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3177 adapter->min_rx_add_entries_per_subcrq = 3178 be64_to_cpu(crq->query_capability.number); 3179 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3180 adapter->min_rx_add_entries_per_subcrq); 3181 break; 3182 case MAX_TX_ENTRIES_PER_SUBCRQ: 3183 adapter->max_tx_entries_per_subcrq = 3184 be64_to_cpu(crq->query_capability.number); 3185 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3186 adapter->max_tx_entries_per_subcrq); 3187 break; 3188 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3189 adapter->max_rx_add_entries_per_subcrq = 3190 be64_to_cpu(crq->query_capability.number); 3191 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3192 adapter->max_rx_add_entries_per_subcrq); 3193 break; 3194 case TCP_IP_OFFLOAD: 3195 adapter->tcp_ip_offload = 3196 be64_to_cpu(crq->query_capability.number); 3197 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3198 adapter->tcp_ip_offload); 3199 break; 3200 case PROMISC_SUPPORTED: 3201 adapter->promisc_supported = 3202 be64_to_cpu(crq->query_capability.number); 3203 netdev_dbg(netdev, "promisc_supported = %lld\n", 3204 adapter->promisc_supported); 3205 break; 3206 case MIN_MTU: 3207 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3208 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3209 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3210 break; 3211 case MAX_MTU: 3212 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3213 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3214 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3215 break; 3216 case MAX_MULTICAST_FILTERS: 3217 adapter->max_multicast_filters = 3218 be64_to_cpu(crq->query_capability.number); 3219 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3220 adapter->max_multicast_filters); 3221 break; 3222 case VLAN_HEADER_INSERTION: 3223 adapter->vlan_header_insertion = 3224 be64_to_cpu(crq->query_capability.number); 3225 if (adapter->vlan_header_insertion) 3226 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3227 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3228 adapter->vlan_header_insertion); 3229 break; 3230 case RX_VLAN_HEADER_INSERTION: 3231 adapter->rx_vlan_header_insertion = 3232 be64_to_cpu(crq->query_capability.number); 3233 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3234 adapter->rx_vlan_header_insertion); 3235 break; 3236 case MAX_TX_SG_ENTRIES: 3237 adapter->max_tx_sg_entries = 3238 be64_to_cpu(crq->query_capability.number); 3239 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3240 adapter->max_tx_sg_entries); 3241 break; 3242 case RX_SG_SUPPORTED: 3243 adapter->rx_sg_supported = 3244 be64_to_cpu(crq->query_capability.number); 3245 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3246 adapter->rx_sg_supported); 3247 break; 3248 case OPT_TX_COMP_SUB_QUEUES: 3249 adapter->opt_tx_comp_sub_queues = 3250 be64_to_cpu(crq->query_capability.number); 3251 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3252 adapter->opt_tx_comp_sub_queues); 3253 break; 3254 case OPT_RX_COMP_QUEUES: 3255 adapter->opt_rx_comp_queues = 3256 be64_to_cpu(crq->query_capability.number); 3257 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3258 adapter->opt_rx_comp_queues); 3259 break; 3260 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3261 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3262 be64_to_cpu(crq->query_capability.number); 3263 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3264 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3265 break; 3266 case OPT_TX_ENTRIES_PER_SUBCRQ: 3267 adapter->opt_tx_entries_per_subcrq = 3268 be64_to_cpu(crq->query_capability.number); 3269 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3270 adapter->opt_tx_entries_per_subcrq); 3271 break; 3272 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3273 adapter->opt_rxba_entries_per_subcrq = 3274 be64_to_cpu(crq->query_capability.number); 3275 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3276 adapter->opt_rxba_entries_per_subcrq); 3277 break; 3278 case TX_RX_DESC_REQ: 3279 adapter->tx_rx_desc_req = crq->query_capability.number; 3280 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3281 adapter->tx_rx_desc_req); 3282 break; 3283 3284 default: 3285 netdev_err(netdev, "Got invalid cap rsp %d\n", 3286 crq->query_capability.capability); 3287 } 3288 3289 out: 3290 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3291 adapter->wait_capability = false; 3292 ibmvnic_send_req_caps(adapter, 0); 3293 } 3294 } 3295 3296 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3297 struct ibmvnic_adapter *adapter) 3298 { 3299 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3300 struct net_device *netdev = adapter->netdev; 3301 struct device *dev = &adapter->vdev->dev; 3302 u64 *u64_crq = (u64 *)crq; 3303 long rc; 3304 3305 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3306 (unsigned long int)cpu_to_be64(u64_crq[0]), 3307 (unsigned long int)cpu_to_be64(u64_crq[1])); 3308 switch (gen_crq->first) { 3309 case IBMVNIC_CRQ_INIT_RSP: 3310 switch (gen_crq->cmd) { 3311 case IBMVNIC_CRQ_INIT: 3312 dev_info(dev, "Partner initialized\n"); 3313 adapter->from_passive_init = true; 3314 complete(&adapter->init_done); 3315 break; 3316 case IBMVNIC_CRQ_INIT_COMPLETE: 3317 dev_info(dev, "Partner initialization complete\n"); 3318 send_version_xchg(adapter); 3319 break; 3320 default: 3321 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3322 } 3323 return; 3324 case IBMVNIC_CRQ_XPORT_EVENT: 3325 netif_carrier_off(netdev); 3326 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3327 dev_info(dev, "Migrated, re-enabling adapter\n"); 3328 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 3329 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3330 dev_info(dev, "Backing device failover detected\n"); 3331 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 3332 } else { 3333 /* The adapter lost the connection */ 3334 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3335 gen_crq->cmd); 3336 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3337 } 3338 return; 3339 case IBMVNIC_CRQ_CMD_RSP: 3340 break; 3341 default: 3342 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3343 gen_crq->first); 3344 return; 3345 } 3346 3347 switch (gen_crq->cmd) { 3348 case VERSION_EXCHANGE_RSP: 3349 rc = crq->version_exchange_rsp.rc.code; 3350 if (rc) { 3351 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3352 break; 3353 } 3354 dev_info(dev, "Partner protocol version is %d\n", 3355 crq->version_exchange_rsp.version); 3356 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3357 ibmvnic_version) 3358 ibmvnic_version = 3359 be16_to_cpu(crq->version_exchange_rsp.version); 3360 send_cap_queries(adapter); 3361 break; 3362 case QUERY_CAPABILITY_RSP: 3363 handle_query_cap_rsp(crq, adapter); 3364 break; 3365 case QUERY_MAP_RSP: 3366 handle_query_map_rsp(crq, adapter); 3367 break; 3368 case REQUEST_MAP_RSP: 3369 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 3370 complete(&adapter->fw_done); 3371 break; 3372 case REQUEST_UNMAP_RSP: 3373 handle_request_unmap_rsp(crq, adapter); 3374 break; 3375 case REQUEST_CAPABILITY_RSP: 3376 handle_request_cap_rsp(crq, adapter); 3377 break; 3378 case LOGIN_RSP: 3379 netdev_dbg(netdev, "Got Login Response\n"); 3380 handle_login_rsp(crq, adapter); 3381 break; 3382 case LOGICAL_LINK_STATE_RSP: 3383 netdev_dbg(netdev, 3384 "Got Logical Link State Response, state: %d rc: %d\n", 3385 crq->logical_link_state_rsp.link_state, 3386 crq->logical_link_state_rsp.rc.code); 3387 adapter->logical_link_state = 3388 crq->logical_link_state_rsp.link_state; 3389 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3390 complete(&adapter->init_done); 3391 break; 3392 case LINK_STATE_INDICATION: 3393 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3394 adapter->phys_link_state = 3395 crq->link_state_indication.phys_link_state; 3396 adapter->logical_link_state = 3397 crq->link_state_indication.logical_link_state; 3398 break; 3399 case CHANGE_MAC_ADDR_RSP: 3400 netdev_dbg(netdev, "Got MAC address change Response\n"); 3401 handle_change_mac_rsp(crq, adapter); 3402 break; 3403 case ERROR_INDICATION: 3404 netdev_dbg(netdev, "Got Error Indication\n"); 3405 handle_error_indication(crq, adapter); 3406 break; 3407 case REQUEST_ERROR_RSP: 3408 netdev_dbg(netdev, "Got Error Detail Response\n"); 3409 handle_error_info_rsp(crq, adapter); 3410 break; 3411 case REQUEST_STATISTICS_RSP: 3412 netdev_dbg(netdev, "Got Statistics Response\n"); 3413 complete(&adapter->stats_done); 3414 break; 3415 case QUERY_IP_OFFLOAD_RSP: 3416 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3417 handle_query_ip_offload_rsp(adapter); 3418 break; 3419 case MULTICAST_CTRL_RSP: 3420 netdev_dbg(netdev, "Got multicast control Response\n"); 3421 break; 3422 case CONTROL_IP_OFFLOAD_RSP: 3423 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3424 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3425 sizeof(adapter->ip_offload_ctrl), 3426 DMA_TO_DEVICE); 3427 complete(&adapter->init_done); 3428 break; 3429 case COLLECT_FW_TRACE_RSP: 3430 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3431 complete(&adapter->fw_done); 3432 break; 3433 default: 3434 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3435 gen_crq->cmd); 3436 } 3437 } 3438 3439 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3440 { 3441 struct ibmvnic_adapter *adapter = instance; 3442 3443 tasklet_schedule(&adapter->tasklet); 3444 return IRQ_HANDLED; 3445 } 3446 3447 static void ibmvnic_tasklet(void *data) 3448 { 3449 struct ibmvnic_adapter *adapter = data; 3450 struct ibmvnic_crq_queue *queue = &adapter->crq; 3451 union ibmvnic_crq *crq; 3452 unsigned long flags; 3453 bool done = false; 3454 3455 spin_lock_irqsave(&queue->lock, flags); 3456 while (!done) { 3457 /* Pull all the valid messages off the CRQ */ 3458 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3459 ibmvnic_handle_crq(crq, adapter); 3460 crq->generic.first = 0; 3461 } 3462 3463 /* remain in tasklet until all 3464 * capabilities responses are received 3465 */ 3466 if (!adapter->wait_capability) 3467 done = true; 3468 } 3469 /* if capabilities CRQ's were sent in this tasklet, the following 3470 * tasklet must wait until all responses are received 3471 */ 3472 if (atomic_read(&adapter->running_cap_crqs) != 0) 3473 adapter->wait_capability = true; 3474 spin_unlock_irqrestore(&queue->lock, flags); 3475 } 3476 3477 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3478 { 3479 struct vio_dev *vdev = adapter->vdev; 3480 int rc; 3481 3482 do { 3483 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3484 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3485 3486 if (rc) 3487 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3488 3489 return rc; 3490 } 3491 3492 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3493 { 3494 struct ibmvnic_crq_queue *crq = &adapter->crq; 3495 struct device *dev = &adapter->vdev->dev; 3496 struct vio_dev *vdev = adapter->vdev; 3497 int rc; 3498 3499 /* Close the CRQ */ 3500 do { 3501 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3502 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3503 3504 /* Clean out the queue */ 3505 memset(crq->msgs, 0, PAGE_SIZE); 3506 crq->cur = 0; 3507 3508 /* And re-open it again */ 3509 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3510 crq->msg_token, PAGE_SIZE); 3511 3512 if (rc == H_CLOSED) 3513 /* Adapter is good, but other end is not ready */ 3514 dev_warn(dev, "Partner adapter not ready\n"); 3515 else if (rc != 0) 3516 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3517 3518 return rc; 3519 } 3520 3521 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3522 { 3523 struct ibmvnic_crq_queue *crq = &adapter->crq; 3524 struct vio_dev *vdev = adapter->vdev; 3525 long rc; 3526 3527 if (!crq->msgs) 3528 return; 3529 3530 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3531 free_irq(vdev->irq, adapter); 3532 tasklet_kill(&adapter->tasklet); 3533 do { 3534 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3535 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3536 3537 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3538 DMA_BIDIRECTIONAL); 3539 free_page((unsigned long)crq->msgs); 3540 crq->msgs = NULL; 3541 } 3542 3543 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3544 { 3545 struct ibmvnic_crq_queue *crq = &adapter->crq; 3546 struct device *dev = &adapter->vdev->dev; 3547 struct vio_dev *vdev = adapter->vdev; 3548 int rc, retrc = -ENOMEM; 3549 3550 if (crq->msgs) 3551 return 0; 3552 3553 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3554 /* Should we allocate more than one page? */ 3555 3556 if (!crq->msgs) 3557 return -ENOMEM; 3558 3559 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3560 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3561 DMA_BIDIRECTIONAL); 3562 if (dma_mapping_error(dev, crq->msg_token)) 3563 goto map_failed; 3564 3565 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3566 crq->msg_token, PAGE_SIZE); 3567 3568 if (rc == H_RESOURCE) 3569 /* maybe kexecing and resource is busy. try a reset */ 3570 rc = ibmvnic_reset_crq(adapter); 3571 retrc = rc; 3572 3573 if (rc == H_CLOSED) { 3574 dev_warn(dev, "Partner adapter not ready\n"); 3575 } else if (rc) { 3576 dev_warn(dev, "Error %d opening adapter\n", rc); 3577 goto reg_crq_failed; 3578 } 3579 3580 retrc = 0; 3581 3582 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3583 (unsigned long)adapter); 3584 3585 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3586 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3587 adapter); 3588 if (rc) { 3589 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3590 vdev->irq, rc); 3591 goto req_irq_failed; 3592 } 3593 3594 rc = vio_enable_interrupts(vdev); 3595 if (rc) { 3596 dev_err(dev, "Error %d enabling interrupts\n", rc); 3597 goto req_irq_failed; 3598 } 3599 3600 crq->cur = 0; 3601 spin_lock_init(&crq->lock); 3602 3603 return retrc; 3604 3605 req_irq_failed: 3606 tasklet_kill(&adapter->tasklet); 3607 do { 3608 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3609 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3610 reg_crq_failed: 3611 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3612 map_failed: 3613 free_page((unsigned long)crq->msgs); 3614 crq->msgs = NULL; 3615 return retrc; 3616 } 3617 3618 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3619 { 3620 struct device *dev = &adapter->vdev->dev; 3621 unsigned long timeout = msecs_to_jiffies(30000); 3622 int rc; 3623 3624 if (adapter->resetting) { 3625 rc = ibmvnic_reset_crq(adapter); 3626 if (!rc) 3627 rc = vio_enable_interrupts(adapter->vdev); 3628 } else { 3629 rc = init_crq_queue(adapter); 3630 } 3631 3632 if (rc) { 3633 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3634 return rc; 3635 } 3636 3637 adapter->from_passive_init = false; 3638 3639 init_completion(&adapter->init_done); 3640 adapter->init_done_rc = 0; 3641 ibmvnic_send_crq_init(adapter); 3642 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3643 dev_err(dev, "Initialization sequence timed out\n"); 3644 return -1; 3645 } 3646 3647 if (adapter->init_done_rc) { 3648 release_crq_queue(adapter); 3649 return adapter->init_done_rc; 3650 } 3651 3652 if (adapter->from_passive_init) { 3653 adapter->state = VNIC_OPEN; 3654 adapter->from_passive_init = false; 3655 return -1; 3656 } 3657 3658 if (adapter->resetting) 3659 rc = reset_sub_crq_queues(adapter); 3660 else 3661 rc = init_sub_crqs(adapter); 3662 if (rc) { 3663 dev_err(dev, "Initialization of sub crqs failed\n"); 3664 release_crq_queue(adapter); 3665 return rc; 3666 } 3667 3668 rc = init_sub_crq_irqs(adapter); 3669 if (rc) { 3670 dev_err(dev, "Failed to initialize sub crq irqs\n"); 3671 release_crq_queue(adapter); 3672 } 3673 3674 return rc; 3675 } 3676 3677 static struct device_attribute dev_attr_failover; 3678 3679 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3680 { 3681 struct ibmvnic_adapter *adapter; 3682 struct net_device *netdev; 3683 unsigned char *mac_addr_p; 3684 int rc; 3685 3686 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3687 dev->unit_address); 3688 3689 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3690 VETH_MAC_ADDR, NULL); 3691 if (!mac_addr_p) { 3692 dev_err(&dev->dev, 3693 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3694 __FILE__, __LINE__); 3695 return 0; 3696 } 3697 3698 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3699 IBMVNIC_MAX_TX_QUEUES); 3700 if (!netdev) 3701 return -ENOMEM; 3702 3703 adapter = netdev_priv(netdev); 3704 adapter->state = VNIC_PROBING; 3705 dev_set_drvdata(&dev->dev, netdev); 3706 adapter->vdev = dev; 3707 adapter->netdev = netdev; 3708 3709 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3710 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3711 netdev->irq = dev->irq; 3712 netdev->netdev_ops = &ibmvnic_netdev_ops; 3713 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3714 SET_NETDEV_DEV(netdev, &dev->dev); 3715 3716 spin_lock_init(&adapter->stats_lock); 3717 3718 INIT_LIST_HEAD(&adapter->errors); 3719 spin_lock_init(&adapter->error_list_lock); 3720 3721 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 3722 INIT_LIST_HEAD(&adapter->rwi_list); 3723 mutex_init(&adapter->reset_lock); 3724 mutex_init(&adapter->rwi_lock); 3725 adapter->resetting = false; 3726 3727 do { 3728 rc = ibmvnic_init(adapter); 3729 if (rc && rc != EAGAIN) { 3730 free_netdev(netdev); 3731 return rc; 3732 } 3733 } while (rc == EAGAIN); 3734 3735 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3736 3737 rc = device_create_file(&dev->dev, &dev_attr_failover); 3738 if (rc) { 3739 free_netdev(netdev); 3740 return rc; 3741 } 3742 3743 rc = register_netdev(netdev); 3744 if (rc) { 3745 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3746 device_remove_file(&dev->dev, &dev_attr_failover); 3747 free_netdev(netdev); 3748 return rc; 3749 } 3750 dev_info(&dev->dev, "ibmvnic registered\n"); 3751 3752 adapter->state = VNIC_PROBED; 3753 return 0; 3754 } 3755 3756 static int ibmvnic_remove(struct vio_dev *dev) 3757 { 3758 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3759 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3760 3761 adapter->state = VNIC_REMOVING; 3762 unregister_netdev(netdev); 3763 mutex_lock(&adapter->reset_lock); 3764 3765 release_resources(adapter); 3766 release_sub_crqs(adapter); 3767 release_crq_queue(adapter); 3768 3769 adapter->state = VNIC_REMOVED; 3770 3771 mutex_unlock(&adapter->reset_lock); 3772 device_remove_file(&dev->dev, &dev_attr_failover); 3773 free_netdev(netdev); 3774 dev_set_drvdata(&dev->dev, NULL); 3775 3776 return 0; 3777 } 3778 3779 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 3780 const char *buf, size_t count) 3781 { 3782 struct net_device *netdev = dev_get_drvdata(dev); 3783 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3784 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 3785 __be64 session_token; 3786 long rc; 3787 3788 if (!sysfs_streq(buf, "1")) 3789 return -EINVAL; 3790 3791 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 3792 H_GET_SESSION_TOKEN, 0, 0, 0); 3793 if (rc) { 3794 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 3795 rc); 3796 return -EINVAL; 3797 } 3798 3799 session_token = (__be64)retbuf[0]; 3800 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 3801 be64_to_cpu(session_token)); 3802 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3803 H_SESSION_ERR_DETECTED, session_token, 0, 0); 3804 if (rc) { 3805 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 3806 rc); 3807 return -EINVAL; 3808 } 3809 3810 return count; 3811 } 3812 3813 static DEVICE_ATTR(failover, 0200, NULL, failover_store); 3814 3815 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3816 { 3817 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3818 struct ibmvnic_adapter *adapter; 3819 struct iommu_table *tbl; 3820 unsigned long ret = 0; 3821 int i; 3822 3823 tbl = get_iommu_table_base(&vdev->dev); 3824 3825 /* netdev inits at probe time along with the structures we need below*/ 3826 if (!netdev) 3827 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3828 3829 adapter = netdev_priv(netdev); 3830 3831 ret += PAGE_SIZE; /* the crq message queue */ 3832 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3833 3834 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3835 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3836 3837 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3838 i++) 3839 ret += adapter->rx_pool[i].size * 3840 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3841 3842 return ret; 3843 } 3844 3845 static int ibmvnic_resume(struct device *dev) 3846 { 3847 struct net_device *netdev = dev_get_drvdata(dev); 3848 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3849 int i; 3850 3851 if (adapter->state != VNIC_OPEN) 3852 return 0; 3853 3854 /* kick the interrupt handlers just in case we lost an interrupt */ 3855 for (i = 0; i < adapter->req_rx_queues; i++) 3856 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3857 adapter->rx_scrq[i]); 3858 3859 return 0; 3860 } 3861 3862 static struct vio_device_id ibmvnic_device_table[] = { 3863 {"network", "IBM,vnic"}, 3864 {"", "" } 3865 }; 3866 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3867 3868 static const struct dev_pm_ops ibmvnic_pm_ops = { 3869 .resume = ibmvnic_resume 3870 }; 3871 3872 static struct vio_driver ibmvnic_driver = { 3873 .id_table = ibmvnic_device_table, 3874 .probe = ibmvnic_probe, 3875 .remove = ibmvnic_remove, 3876 .get_desired_dma = ibmvnic_get_desired_dma, 3877 .name = ibmvnic_driver_name, 3878 .pm = &ibmvnic_pm_ops, 3879 }; 3880 3881 /* module functions */ 3882 static int __init ibmvnic_module_init(void) 3883 { 3884 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3885 IBMVNIC_DRIVER_VERSION); 3886 3887 return vio_register_driver(&ibmvnic_driver); 3888 } 3889 3890 static void __exit ibmvnic_module_exit(void) 3891 { 3892 vio_unregister_driver(&ibmvnic_driver); 3893 } 3894 3895 module_init(ibmvnic_module_init); 3896 module_exit(ibmvnic_module_exit); 3897