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_crqs(struct ibmvnic_adapter *); 115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 116 static int ibmvnic_init(struct ibmvnic_adapter *); 117 static void release_crq_queue(struct ibmvnic_adapter *); 118 119 struct ibmvnic_stat { 120 char name[ETH_GSTRING_LEN]; 121 int offset; 122 }; 123 124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 125 offsetof(struct ibmvnic_statistics, stat)) 126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 127 128 static const struct ibmvnic_stat ibmvnic_stats[] = { 129 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 130 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 131 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 132 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 133 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 134 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 135 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 136 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 137 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 138 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 139 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 140 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 141 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 142 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 143 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 144 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 145 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 146 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 147 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 148 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 149 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 150 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 151 }; 152 153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 154 unsigned long length, unsigned long *number, 155 unsigned long *irq) 156 { 157 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 158 long rc; 159 160 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 161 *number = retbuf[0]; 162 *irq = retbuf[1]; 163 164 return rc; 165 } 166 167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 168 struct ibmvnic_long_term_buff *ltb, int size) 169 { 170 struct device *dev = &adapter->vdev->dev; 171 172 ltb->size = size; 173 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 174 GFP_KERNEL); 175 176 if (!ltb->buff) { 177 dev_err(dev, "Couldn't alloc long term buffer\n"); 178 return -ENOMEM; 179 } 180 ltb->map_id = adapter->map_id; 181 adapter->map_id++; 182 183 init_completion(&adapter->fw_done); 184 send_request_map(adapter, ltb->addr, 185 ltb->size, ltb->map_id); 186 wait_for_completion(&adapter->fw_done); 187 188 if (adapter->fw_done_rc) { 189 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 190 adapter->fw_done_rc); 191 return -1; 192 } 193 return 0; 194 } 195 196 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 197 struct ibmvnic_long_term_buff *ltb) 198 { 199 struct device *dev = &adapter->vdev->dev; 200 201 if (!ltb->buff) 202 return; 203 204 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 205 adapter->reset_reason != VNIC_RESET_MOBILITY) 206 send_request_unmap(adapter, ltb->map_id); 207 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 208 } 209 210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 211 struct ibmvnic_long_term_buff *ltb) 212 { 213 memset(ltb->buff, 0, ltb->size); 214 215 init_completion(&adapter->fw_done); 216 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 217 wait_for_completion(&adapter->fw_done); 218 219 if (adapter->fw_done_rc) { 220 dev_info(&adapter->vdev->dev, 221 "Reset failed, attempting to free and reallocate buffer\n"); 222 free_long_term_buff(adapter, ltb); 223 return alloc_long_term_buff(adapter, ltb, ltb->size); 224 } 225 return 0; 226 } 227 228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 229 { 230 int i; 231 232 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 233 i++) 234 adapter->rx_pool[i].active = 0; 235 } 236 237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 238 struct ibmvnic_rx_pool *pool) 239 { 240 int count = pool->size - atomic_read(&pool->available); 241 struct device *dev = &adapter->vdev->dev; 242 int buffers_added = 0; 243 unsigned long lpar_rc; 244 union sub_crq sub_crq; 245 struct sk_buff *skb; 246 unsigned int offset; 247 dma_addr_t dma_addr; 248 unsigned char *dst; 249 u64 *handle_array; 250 int shift = 0; 251 int index; 252 int i; 253 254 if (!pool->active) 255 return; 256 257 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 258 be32_to_cpu(adapter->login_rsp_buf-> 259 off_rxadd_subcrqs)); 260 261 for (i = 0; i < count; ++i) { 262 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 263 if (!skb) { 264 dev_err(dev, "Couldn't replenish rx buff\n"); 265 adapter->replenish_no_mem++; 266 break; 267 } 268 269 index = pool->free_map[pool->next_free]; 270 271 if (pool->rx_buff[index].skb) 272 dev_err(dev, "Inconsistent free_map!\n"); 273 274 /* Copy the skb to the long term mapped DMA buffer */ 275 offset = index * pool->buff_size; 276 dst = pool->long_term_buff.buff + offset; 277 memset(dst, 0, pool->buff_size); 278 dma_addr = pool->long_term_buff.addr + offset; 279 pool->rx_buff[index].data = dst; 280 281 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 282 pool->rx_buff[index].dma = dma_addr; 283 pool->rx_buff[index].skb = skb; 284 pool->rx_buff[index].pool_index = pool->index; 285 pool->rx_buff[index].size = pool->buff_size; 286 287 memset(&sub_crq, 0, sizeof(sub_crq)); 288 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 289 sub_crq.rx_add.correlator = 290 cpu_to_be64((u64)&pool->rx_buff[index]); 291 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 292 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 293 294 /* The length field of the sCRQ is defined to be 24 bits so the 295 * buffer size needs to be left shifted by a byte before it is 296 * converted to big endian to prevent the last byte from being 297 * truncated. 298 */ 299 #ifdef __LITTLE_ENDIAN__ 300 shift = 8; 301 #endif 302 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 303 304 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 305 &sub_crq); 306 if (lpar_rc != H_SUCCESS) 307 goto failure; 308 309 buffers_added++; 310 adapter->replenish_add_buff_success++; 311 pool->next_free = (pool->next_free + 1) % pool->size; 312 } 313 atomic_add(buffers_added, &pool->available); 314 return; 315 316 failure: 317 dev_info(dev, "replenish pools failure\n"); 318 pool->free_map[pool->next_free] = index; 319 pool->rx_buff[index].skb = NULL; 320 if (!dma_mapping_error(dev, dma_addr)) 321 dma_unmap_single(dev, dma_addr, pool->buff_size, 322 DMA_FROM_DEVICE); 323 324 dev_kfree_skb_any(skb); 325 adapter->replenish_add_buff_failure++; 326 atomic_add(buffers_added, &pool->available); 327 328 if (lpar_rc == H_CLOSED) { 329 /* Disable buffer pool replenishment and report carrier off if 330 * queue is closed. Firmware guarantees that a signal will 331 * be sent to the driver, triggering a reset. 332 */ 333 deactivate_rx_pools(adapter); 334 netif_carrier_off(adapter->netdev); 335 } 336 } 337 338 static void replenish_pools(struct ibmvnic_adapter *adapter) 339 { 340 int i; 341 342 adapter->replenish_task_cycles++; 343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 344 i++) { 345 if (adapter->rx_pool[i].active) 346 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 347 } 348 } 349 350 static void release_stats_token(struct ibmvnic_adapter *adapter) 351 { 352 struct device *dev = &adapter->vdev->dev; 353 354 if (!adapter->stats_token) 355 return; 356 357 dma_unmap_single(dev, adapter->stats_token, 358 sizeof(struct ibmvnic_statistics), 359 DMA_FROM_DEVICE); 360 adapter->stats_token = 0; 361 } 362 363 static int init_stats_token(struct ibmvnic_adapter *adapter) 364 { 365 struct device *dev = &adapter->vdev->dev; 366 dma_addr_t stok; 367 368 stok = dma_map_single(dev, &adapter->stats, 369 sizeof(struct ibmvnic_statistics), 370 DMA_FROM_DEVICE); 371 if (dma_mapping_error(dev, stok)) { 372 dev_err(dev, "Couldn't map stats buffer\n"); 373 return -1; 374 } 375 376 adapter->stats_token = stok; 377 return 0; 378 } 379 380 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 381 { 382 struct ibmvnic_rx_pool *rx_pool; 383 int rx_scrqs; 384 int i, j, rc; 385 386 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 387 for (i = 0; i < rx_scrqs; i++) { 388 rx_pool = &adapter->rx_pool[i]; 389 390 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff); 391 if (rc) 392 return rc; 393 394 for (j = 0; j < rx_pool->size; j++) 395 rx_pool->free_map[j] = j; 396 397 memset(rx_pool->rx_buff, 0, 398 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 399 400 atomic_set(&rx_pool->available, 0); 401 rx_pool->next_alloc = 0; 402 rx_pool->next_free = 0; 403 rx_pool->active = 1; 404 } 405 406 return 0; 407 } 408 409 static void release_rx_pools(struct ibmvnic_adapter *adapter) 410 { 411 struct ibmvnic_rx_pool *rx_pool; 412 int rx_scrqs; 413 int i, j; 414 415 if (!adapter->rx_pool) 416 return; 417 418 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 419 for (i = 0; i < rx_scrqs; i++) { 420 rx_pool = &adapter->rx_pool[i]; 421 422 kfree(rx_pool->free_map); 423 free_long_term_buff(adapter, &rx_pool->long_term_buff); 424 425 if (!rx_pool->rx_buff) 426 continue; 427 428 for (j = 0; j < rx_pool->size; j++) { 429 if (rx_pool->rx_buff[j].skb) { 430 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 431 rx_pool->rx_buff[i].skb = NULL; 432 } 433 } 434 435 kfree(rx_pool->rx_buff); 436 } 437 438 kfree(adapter->rx_pool); 439 adapter->rx_pool = NULL; 440 } 441 442 static int init_rx_pools(struct net_device *netdev) 443 { 444 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 445 struct device *dev = &adapter->vdev->dev; 446 struct ibmvnic_rx_pool *rx_pool; 447 int rxadd_subcrqs; 448 u64 *size_array; 449 int i, j; 450 451 rxadd_subcrqs = 452 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 453 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 454 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 455 456 adapter->rx_pool = kcalloc(rxadd_subcrqs, 457 sizeof(struct ibmvnic_rx_pool), 458 GFP_KERNEL); 459 if (!adapter->rx_pool) { 460 dev_err(dev, "Failed to allocate rx pools\n"); 461 return -1; 462 } 463 464 for (i = 0; i < rxadd_subcrqs; i++) { 465 rx_pool = &adapter->rx_pool[i]; 466 467 netdev_dbg(adapter->netdev, 468 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 469 i, adapter->req_rx_add_entries_per_subcrq, 470 be64_to_cpu(size_array[i])); 471 472 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 473 rx_pool->index = i; 474 rx_pool->buff_size = be64_to_cpu(size_array[i]); 475 rx_pool->active = 1; 476 477 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 478 GFP_KERNEL); 479 if (!rx_pool->free_map) { 480 release_rx_pools(adapter); 481 return -1; 482 } 483 484 rx_pool->rx_buff = kcalloc(rx_pool->size, 485 sizeof(struct ibmvnic_rx_buff), 486 GFP_KERNEL); 487 if (!rx_pool->rx_buff) { 488 dev_err(dev, "Couldn't alloc rx buffers\n"); 489 release_rx_pools(adapter); 490 return -1; 491 } 492 493 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 494 rx_pool->size * rx_pool->buff_size)) { 495 release_rx_pools(adapter); 496 return -1; 497 } 498 499 for (j = 0; j < rx_pool->size; ++j) 500 rx_pool->free_map[j] = j; 501 502 atomic_set(&rx_pool->available, 0); 503 rx_pool->next_alloc = 0; 504 rx_pool->next_free = 0; 505 } 506 507 return 0; 508 } 509 510 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 511 { 512 struct ibmvnic_tx_pool *tx_pool; 513 int tx_scrqs; 514 int i, j, rc; 515 516 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 517 for (i = 0; i < tx_scrqs; i++) { 518 tx_pool = &adapter->tx_pool[i]; 519 520 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 521 if (rc) 522 return rc; 523 524 memset(tx_pool->tx_buff, 0, 525 adapter->req_tx_entries_per_subcrq * 526 sizeof(struct ibmvnic_tx_buff)); 527 528 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 529 tx_pool->free_map[j] = j; 530 531 tx_pool->consumer_index = 0; 532 tx_pool->producer_index = 0; 533 } 534 535 return 0; 536 } 537 538 static void release_tx_pools(struct ibmvnic_adapter *adapter) 539 { 540 struct ibmvnic_tx_pool *tx_pool; 541 int i, tx_scrqs; 542 543 if (!adapter->tx_pool) 544 return; 545 546 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 547 for (i = 0; i < tx_scrqs; i++) { 548 tx_pool = &adapter->tx_pool[i]; 549 kfree(tx_pool->tx_buff); 550 free_long_term_buff(adapter, &tx_pool->long_term_buff); 551 kfree(tx_pool->free_map); 552 } 553 554 kfree(adapter->tx_pool); 555 adapter->tx_pool = NULL; 556 } 557 558 static int init_tx_pools(struct net_device *netdev) 559 { 560 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 561 struct device *dev = &adapter->vdev->dev; 562 struct ibmvnic_tx_pool *tx_pool; 563 int tx_subcrqs; 564 int i, j; 565 566 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 567 adapter->tx_pool = kcalloc(tx_subcrqs, 568 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 569 if (!adapter->tx_pool) 570 return -1; 571 572 for (i = 0; i < tx_subcrqs; i++) { 573 tx_pool = &adapter->tx_pool[i]; 574 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 575 sizeof(struct ibmvnic_tx_buff), 576 GFP_KERNEL); 577 if (!tx_pool->tx_buff) { 578 dev_err(dev, "tx pool buffer allocation failed\n"); 579 release_tx_pools(adapter); 580 return -1; 581 } 582 583 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 584 adapter->req_tx_entries_per_subcrq * 585 adapter->req_mtu)) { 586 release_tx_pools(adapter); 587 return -1; 588 } 589 590 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 591 sizeof(int), GFP_KERNEL); 592 if (!tx_pool->free_map) { 593 release_tx_pools(adapter); 594 return -1; 595 } 596 597 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 598 tx_pool->free_map[j] = j; 599 600 tx_pool->consumer_index = 0; 601 tx_pool->producer_index = 0; 602 } 603 604 return 0; 605 } 606 607 static void release_error_buffers(struct ibmvnic_adapter *adapter) 608 { 609 struct device *dev = &adapter->vdev->dev; 610 struct ibmvnic_error_buff *error_buff, *tmp; 611 unsigned long flags; 612 613 spin_lock_irqsave(&adapter->error_list_lock, flags); 614 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 615 list_del(&error_buff->list); 616 dma_unmap_single(dev, error_buff->dma, error_buff->len, 617 DMA_FROM_DEVICE); 618 kfree(error_buff->buff); 619 kfree(error_buff); 620 } 621 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 622 } 623 624 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 625 { 626 int i; 627 628 if (adapter->napi_enabled) 629 return; 630 631 for (i = 0; i < adapter->req_rx_queues; i++) 632 napi_enable(&adapter->napi[i]); 633 634 adapter->napi_enabled = true; 635 } 636 637 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 638 { 639 int i; 640 641 if (!adapter->napi_enabled) 642 return; 643 644 for (i = 0; i < adapter->req_rx_queues; i++) 645 napi_disable(&adapter->napi[i]); 646 647 adapter->napi_enabled = false; 648 } 649 650 static int ibmvnic_login(struct net_device *netdev) 651 { 652 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 653 unsigned long timeout = msecs_to_jiffies(30000); 654 struct device *dev = &adapter->vdev->dev; 655 int rc; 656 657 do { 658 if (adapter->renegotiate) { 659 adapter->renegotiate = false; 660 release_sub_crqs(adapter); 661 662 reinit_completion(&adapter->init_done); 663 send_cap_queries(adapter); 664 if (!wait_for_completion_timeout(&adapter->init_done, 665 timeout)) { 666 dev_err(dev, "Capabilities query timeout\n"); 667 return -1; 668 } 669 rc = init_sub_crqs(adapter); 670 if (rc) { 671 dev_err(dev, 672 "Initialization of SCRQ's failed\n"); 673 return -1; 674 } 675 rc = init_sub_crq_irqs(adapter); 676 if (rc) { 677 dev_err(dev, 678 "Initialization of SCRQ's irqs failed\n"); 679 return -1; 680 } 681 } 682 683 reinit_completion(&adapter->init_done); 684 send_login(adapter); 685 if (!wait_for_completion_timeout(&adapter->init_done, 686 timeout)) { 687 dev_err(dev, "Login timeout\n"); 688 return -1; 689 } 690 } while (adapter->renegotiate); 691 692 return 0; 693 } 694 695 static void release_resources(struct ibmvnic_adapter *adapter) 696 { 697 int i; 698 699 release_tx_pools(adapter); 700 release_rx_pools(adapter); 701 702 release_stats_token(adapter); 703 release_error_buffers(adapter); 704 705 if (adapter->napi) { 706 for (i = 0; i < adapter->req_rx_queues; i++) { 707 if (&adapter->napi[i]) 708 netif_napi_del(&adapter->napi[i]); 709 } 710 } 711 } 712 713 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 714 { 715 struct net_device *netdev = adapter->netdev; 716 unsigned long timeout = msecs_to_jiffies(30000); 717 union ibmvnic_crq crq; 718 bool resend; 719 int rc; 720 721 netdev_err(netdev, "setting link state %d\n", link_state); 722 memset(&crq, 0, sizeof(crq)); 723 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 724 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 725 crq.logical_link_state.link_state = link_state; 726 727 do { 728 resend = false; 729 730 reinit_completion(&adapter->init_done); 731 rc = ibmvnic_send_crq(adapter, &crq); 732 if (rc) { 733 netdev_err(netdev, "Failed to set link state\n"); 734 return rc; 735 } 736 737 if (!wait_for_completion_timeout(&adapter->init_done, 738 timeout)) { 739 netdev_err(netdev, "timeout setting link state\n"); 740 return -1; 741 } 742 743 if (adapter->init_done_rc == 1) { 744 /* Partuial success, delay and re-send */ 745 mdelay(1000); 746 resend = true; 747 } 748 } while (resend); 749 750 return 0; 751 } 752 753 static int set_real_num_queues(struct net_device *netdev) 754 { 755 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 756 int rc; 757 758 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 759 if (rc) { 760 netdev_err(netdev, "failed to set the number of tx queues\n"); 761 return rc; 762 } 763 764 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 765 if (rc) 766 netdev_err(netdev, "failed to set the number of rx queues\n"); 767 768 return rc; 769 } 770 771 static int init_resources(struct ibmvnic_adapter *adapter) 772 { 773 struct net_device *netdev = adapter->netdev; 774 int i, rc; 775 776 rc = set_real_num_queues(netdev); 777 if (rc) 778 return rc; 779 780 rc = init_stats_token(adapter); 781 if (rc) 782 return rc; 783 784 adapter->map_id = 1; 785 adapter->napi = kcalloc(adapter->req_rx_queues, 786 sizeof(struct napi_struct), GFP_KERNEL); 787 if (!adapter->napi) 788 return -ENOMEM; 789 790 for (i = 0; i < adapter->req_rx_queues; i++) { 791 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 792 NAPI_POLL_WEIGHT); 793 } 794 795 send_map_query(adapter); 796 797 rc = init_rx_pools(netdev); 798 if (rc) 799 return rc; 800 801 rc = init_tx_pools(netdev); 802 return rc; 803 } 804 805 static int __ibmvnic_open(struct net_device *netdev) 806 { 807 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 808 enum vnic_state prev_state = adapter->state; 809 int i, rc; 810 811 adapter->state = VNIC_OPENING; 812 replenish_pools(adapter); 813 ibmvnic_napi_enable(adapter); 814 815 /* We're ready to receive frames, enable the sub-crq interrupts and 816 * set the logical link state to up 817 */ 818 for (i = 0; i < adapter->req_rx_queues; i++) { 819 if (prev_state == VNIC_CLOSED) 820 enable_irq(adapter->rx_scrq[i]->irq); 821 else 822 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 823 } 824 825 for (i = 0; i < adapter->req_tx_queues; i++) { 826 if (prev_state == VNIC_CLOSED) 827 enable_irq(adapter->tx_scrq[i]->irq); 828 else 829 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 830 } 831 832 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 833 if (rc) { 834 for (i = 0; i < adapter->req_rx_queues; i++) 835 napi_disable(&adapter->napi[i]); 836 release_resources(adapter); 837 return rc; 838 } 839 840 netif_tx_start_all_queues(netdev); 841 842 if (prev_state == VNIC_CLOSED) { 843 for (i = 0; i < adapter->req_rx_queues; i++) 844 napi_schedule(&adapter->napi[i]); 845 } 846 847 adapter->state = VNIC_OPEN; 848 return rc; 849 } 850 851 static int ibmvnic_open(struct net_device *netdev) 852 { 853 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 854 int rc; 855 856 mutex_lock(&adapter->reset_lock); 857 858 if (adapter->state != VNIC_CLOSED) { 859 rc = ibmvnic_login(netdev); 860 if (rc) { 861 mutex_unlock(&adapter->reset_lock); 862 return rc; 863 } 864 865 rc = init_resources(adapter); 866 if (rc) { 867 netdev_err(netdev, "failed to initialize resources\n"); 868 release_resources(adapter); 869 mutex_unlock(&adapter->reset_lock); 870 return rc; 871 } 872 } 873 874 rc = __ibmvnic_open(netdev); 875 mutex_unlock(&adapter->reset_lock); 876 877 return rc; 878 } 879 880 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 881 { 882 struct ibmvnic_tx_pool *tx_pool; 883 u64 tx_entries; 884 int tx_scrqs; 885 int i, j; 886 887 if (!adapter->tx_pool) 888 return; 889 890 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 891 tx_entries = adapter->req_tx_entries_per_subcrq; 892 893 /* Free any remaining skbs in the tx buffer pools */ 894 for (i = 0; i < tx_scrqs; i++) { 895 tx_pool = &adapter->tx_pool[i]; 896 if (!tx_pool) 897 continue; 898 899 for (j = 0; j < tx_entries; j++) { 900 if (tx_pool->tx_buff[j].skb) { 901 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 902 tx_pool->tx_buff[j].skb = NULL; 903 } 904 } 905 } 906 } 907 908 static int __ibmvnic_close(struct net_device *netdev) 909 { 910 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 911 int rc = 0; 912 int i; 913 914 adapter->state = VNIC_CLOSING; 915 916 /* ensure that transmissions are stopped if called by do_reset */ 917 if (adapter->resetting) 918 netif_tx_disable(netdev); 919 else 920 netif_tx_stop_all_queues(netdev); 921 922 ibmvnic_napi_disable(adapter); 923 924 if (adapter->tx_scrq) { 925 for (i = 0; i < adapter->req_tx_queues; i++) 926 if (adapter->tx_scrq[i]->irq) 927 disable_irq(adapter->tx_scrq[i]->irq); 928 } 929 930 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 931 if (rc) 932 return rc; 933 934 if (adapter->rx_scrq) { 935 for (i = 0; i < adapter->req_rx_queues; i++) { 936 int retries = 10; 937 938 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 939 retries--; 940 mdelay(100); 941 942 if (retries == 0) 943 break; 944 } 945 946 if (adapter->rx_scrq[i]->irq) 947 disable_irq(adapter->rx_scrq[i]->irq); 948 } 949 } 950 951 clean_tx_pools(adapter); 952 adapter->state = VNIC_CLOSED; 953 return rc; 954 } 955 956 static int ibmvnic_close(struct net_device *netdev) 957 { 958 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 959 int rc; 960 961 mutex_lock(&adapter->reset_lock); 962 rc = __ibmvnic_close(netdev); 963 mutex_unlock(&adapter->reset_lock); 964 965 return rc; 966 } 967 968 /** 969 * build_hdr_data - creates L2/L3/L4 header data buffer 970 * @hdr_field - bitfield determining needed headers 971 * @skb - socket buffer 972 * @hdr_len - array of header lengths 973 * @tot_len - total length of data 974 * 975 * Reads hdr_field to determine which headers are needed by firmware. 976 * Builds a buffer containing these headers. Saves individual header 977 * lengths and total buffer length to be used to build descriptors. 978 */ 979 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 980 int *hdr_len, u8 *hdr_data) 981 { 982 int len = 0; 983 u8 *hdr; 984 985 hdr_len[0] = sizeof(struct ethhdr); 986 987 if (skb->protocol == htons(ETH_P_IP)) { 988 hdr_len[1] = ip_hdr(skb)->ihl * 4; 989 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 990 hdr_len[2] = tcp_hdrlen(skb); 991 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 992 hdr_len[2] = sizeof(struct udphdr); 993 } else if (skb->protocol == htons(ETH_P_IPV6)) { 994 hdr_len[1] = sizeof(struct ipv6hdr); 995 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 996 hdr_len[2] = tcp_hdrlen(skb); 997 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 998 hdr_len[2] = sizeof(struct udphdr); 999 } 1000 1001 memset(hdr_data, 0, 120); 1002 if ((hdr_field >> 6) & 1) { 1003 hdr = skb_mac_header(skb); 1004 memcpy(hdr_data, hdr, hdr_len[0]); 1005 len += hdr_len[0]; 1006 } 1007 1008 if ((hdr_field >> 5) & 1) { 1009 hdr = skb_network_header(skb); 1010 memcpy(hdr_data + len, hdr, hdr_len[1]); 1011 len += hdr_len[1]; 1012 } 1013 1014 if ((hdr_field >> 4) & 1) { 1015 hdr = skb_transport_header(skb); 1016 memcpy(hdr_data + len, hdr, hdr_len[2]); 1017 len += hdr_len[2]; 1018 } 1019 return len; 1020 } 1021 1022 /** 1023 * create_hdr_descs - create header and header extension descriptors 1024 * @hdr_field - bitfield determining needed headers 1025 * @data - buffer containing header data 1026 * @len - length of data buffer 1027 * @hdr_len - array of individual header lengths 1028 * @scrq_arr - descriptor array 1029 * 1030 * Creates header and, if needed, header extension descriptors and 1031 * places them in a descriptor array, scrq_arr 1032 */ 1033 1034 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1035 union sub_crq *scrq_arr) 1036 { 1037 union sub_crq hdr_desc; 1038 int tmp_len = len; 1039 u8 *data, *cur; 1040 int tmp; 1041 1042 while (tmp_len > 0) { 1043 cur = hdr_data + len - tmp_len; 1044 1045 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1046 if (cur != hdr_data) { 1047 data = hdr_desc.hdr_ext.data; 1048 tmp = tmp_len > 29 ? 29 : tmp_len; 1049 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1050 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1051 hdr_desc.hdr_ext.len = tmp; 1052 } else { 1053 data = hdr_desc.hdr.data; 1054 tmp = tmp_len > 24 ? 24 : tmp_len; 1055 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1056 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1057 hdr_desc.hdr.len = tmp; 1058 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1059 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1060 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1061 hdr_desc.hdr.flag = hdr_field << 1; 1062 } 1063 memcpy(data, cur, tmp); 1064 tmp_len -= tmp; 1065 *scrq_arr = hdr_desc; 1066 scrq_arr++; 1067 } 1068 } 1069 1070 /** 1071 * build_hdr_descs_arr - build a header descriptor array 1072 * @skb - socket buffer 1073 * @num_entries - number of descriptors to be sent 1074 * @subcrq - first TX descriptor 1075 * @hdr_field - bit field determining which headers will be sent 1076 * 1077 * This function will build a TX descriptor array with applicable 1078 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1079 */ 1080 1081 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1082 int *num_entries, u8 hdr_field) 1083 { 1084 int hdr_len[3] = {0, 0, 0}; 1085 int tot_len, len; 1086 u8 *hdr_data = txbuff->hdr_data; 1087 1088 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1089 txbuff->hdr_data); 1090 len = tot_len; 1091 len -= 24; 1092 if (len > 0) 1093 num_entries += len % 29 ? len / 29 + 1 : len / 29; 1094 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1095 txbuff->indir_arr + 1); 1096 } 1097 1098 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1099 { 1100 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1101 int queue_num = skb_get_queue_mapping(skb); 1102 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1103 struct device *dev = &adapter->vdev->dev; 1104 struct ibmvnic_tx_buff *tx_buff = NULL; 1105 struct ibmvnic_sub_crq_queue *tx_scrq; 1106 struct ibmvnic_tx_pool *tx_pool; 1107 unsigned int tx_send_failed = 0; 1108 unsigned int tx_map_failed = 0; 1109 unsigned int tx_dropped = 0; 1110 unsigned int tx_packets = 0; 1111 unsigned int tx_bytes = 0; 1112 dma_addr_t data_dma_addr; 1113 struct netdev_queue *txq; 1114 unsigned long lpar_rc; 1115 union sub_crq tx_crq; 1116 unsigned int offset; 1117 int num_entries = 1; 1118 unsigned char *dst; 1119 u64 *handle_array; 1120 int index = 0; 1121 int ret = 0; 1122 1123 if (adapter->resetting) { 1124 if (!netif_subqueue_stopped(netdev, skb)) 1125 netif_stop_subqueue(netdev, queue_num); 1126 dev_kfree_skb_any(skb); 1127 1128 tx_send_failed++; 1129 tx_dropped++; 1130 ret = NETDEV_TX_OK; 1131 goto out; 1132 } 1133 1134 tx_pool = &adapter->tx_pool[queue_num]; 1135 tx_scrq = adapter->tx_scrq[queue_num]; 1136 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1137 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1138 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1139 1140 index = tx_pool->free_map[tx_pool->consumer_index]; 1141 offset = index * adapter->req_mtu; 1142 dst = tx_pool->long_term_buff.buff + offset; 1143 memset(dst, 0, adapter->req_mtu); 1144 skb_copy_from_linear_data(skb, dst, skb->len); 1145 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1146 1147 tx_pool->consumer_index = 1148 (tx_pool->consumer_index + 1) % 1149 adapter->req_tx_entries_per_subcrq; 1150 1151 tx_buff = &tx_pool->tx_buff[index]; 1152 tx_buff->skb = skb; 1153 tx_buff->data_dma[0] = data_dma_addr; 1154 tx_buff->data_len[0] = skb->len; 1155 tx_buff->index = index; 1156 tx_buff->pool_index = queue_num; 1157 tx_buff->last_frag = true; 1158 1159 memset(&tx_crq, 0, sizeof(tx_crq)); 1160 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1161 tx_crq.v1.type = IBMVNIC_TX_DESC; 1162 tx_crq.v1.n_crq_elem = 1; 1163 tx_crq.v1.n_sge = 1; 1164 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1165 tx_crq.v1.correlator = cpu_to_be32(index); 1166 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1167 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1168 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1169 1170 if (adapter->vlan_header_insertion) { 1171 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1172 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1173 } 1174 1175 if (skb->protocol == htons(ETH_P_IP)) { 1176 if (ip_hdr(skb)->version == 4) 1177 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1178 else if (ip_hdr(skb)->version == 6) 1179 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1180 1181 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1182 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1183 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 1184 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1185 } 1186 1187 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1188 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1189 hdrs += 2; 1190 } 1191 /* determine if l2/3/4 headers are sent to firmware */ 1192 if ((*hdrs >> 7) & 1 && 1193 (skb->protocol == htons(ETH_P_IP) || 1194 skb->protocol == htons(ETH_P_IPV6))) { 1195 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1196 tx_crq.v1.n_crq_elem = num_entries; 1197 tx_buff->indir_arr[0] = tx_crq; 1198 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1199 sizeof(tx_buff->indir_arr), 1200 DMA_TO_DEVICE); 1201 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1202 dev_kfree_skb_any(skb); 1203 tx_buff->skb = NULL; 1204 if (!firmware_has_feature(FW_FEATURE_CMO)) 1205 dev_err(dev, "tx: unable to map descriptor array\n"); 1206 tx_map_failed++; 1207 tx_dropped++; 1208 ret = NETDEV_TX_OK; 1209 goto out; 1210 } 1211 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1212 (u64)tx_buff->indir_dma, 1213 (u64)num_entries); 1214 } else { 1215 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1216 &tx_crq); 1217 } 1218 if (lpar_rc != H_SUCCESS) { 1219 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1220 1221 if (tx_pool->consumer_index == 0) 1222 tx_pool->consumer_index = 1223 adapter->req_tx_entries_per_subcrq - 1; 1224 else 1225 tx_pool->consumer_index--; 1226 1227 dev_kfree_skb_any(skb); 1228 tx_buff->skb = NULL; 1229 1230 if (lpar_rc == H_CLOSED) { 1231 /* Disable TX and report carrier off if queue is closed. 1232 * Firmware guarantees that a signal will be sent to the 1233 * driver, triggering a reset or some other action. 1234 */ 1235 netif_tx_stop_all_queues(netdev); 1236 netif_carrier_off(netdev); 1237 } 1238 1239 tx_send_failed++; 1240 tx_dropped++; 1241 ret = NETDEV_TX_OK; 1242 goto out; 1243 } 1244 1245 if (atomic_inc_return(&tx_scrq->used) 1246 >= adapter->req_tx_entries_per_subcrq) { 1247 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1248 netif_stop_subqueue(netdev, queue_num); 1249 } 1250 1251 tx_packets++; 1252 tx_bytes += skb->len; 1253 txq->trans_start = jiffies; 1254 ret = NETDEV_TX_OK; 1255 1256 out: 1257 netdev->stats.tx_dropped += tx_dropped; 1258 netdev->stats.tx_bytes += tx_bytes; 1259 netdev->stats.tx_packets += tx_packets; 1260 adapter->tx_send_failed += tx_send_failed; 1261 adapter->tx_map_failed += tx_map_failed; 1262 1263 return ret; 1264 } 1265 1266 static void ibmvnic_set_multi(struct net_device *netdev) 1267 { 1268 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1269 struct netdev_hw_addr *ha; 1270 union ibmvnic_crq crq; 1271 1272 memset(&crq, 0, sizeof(crq)); 1273 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1274 crq.request_capability.cmd = REQUEST_CAPABILITY; 1275 1276 if (netdev->flags & IFF_PROMISC) { 1277 if (!adapter->promisc_supported) 1278 return; 1279 } else { 1280 if (netdev->flags & IFF_ALLMULTI) { 1281 /* Accept all multicast */ 1282 memset(&crq, 0, sizeof(crq)); 1283 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1284 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1285 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1286 ibmvnic_send_crq(adapter, &crq); 1287 } else if (netdev_mc_empty(netdev)) { 1288 /* Reject all multicast */ 1289 memset(&crq, 0, sizeof(crq)); 1290 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1291 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1292 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1293 ibmvnic_send_crq(adapter, &crq); 1294 } else { 1295 /* Accept one or more multicast(s) */ 1296 netdev_for_each_mc_addr(ha, netdev) { 1297 memset(&crq, 0, sizeof(crq)); 1298 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1299 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1300 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1301 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1302 ha->addr); 1303 ibmvnic_send_crq(adapter, &crq); 1304 } 1305 } 1306 } 1307 } 1308 1309 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1310 { 1311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1312 struct sockaddr *addr = p; 1313 union ibmvnic_crq crq; 1314 1315 if (!is_valid_ether_addr(addr->sa_data)) 1316 return -EADDRNOTAVAIL; 1317 1318 memset(&crq, 0, sizeof(crq)); 1319 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1320 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1321 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1322 ibmvnic_send_crq(adapter, &crq); 1323 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1324 return 0; 1325 } 1326 1327 /** 1328 * do_reset returns zero if we are able to keep processing reset events, or 1329 * non-zero if we hit a fatal error and must halt. 1330 */ 1331 static int do_reset(struct ibmvnic_adapter *adapter, 1332 struct ibmvnic_rwi *rwi, u32 reset_state) 1333 { 1334 struct net_device *netdev = adapter->netdev; 1335 int i, rc; 1336 1337 netif_carrier_off(netdev); 1338 adapter->reset_reason = rwi->reset_reason; 1339 1340 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1341 rc = ibmvnic_reenable_crq_queue(adapter); 1342 if (rc) 1343 return 0; 1344 } 1345 1346 rc = __ibmvnic_close(netdev); 1347 if (rc) 1348 return rc; 1349 1350 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1351 /* remove the closed state so when we call open it appears 1352 * we are coming from the probed state. 1353 */ 1354 adapter->state = VNIC_PROBED; 1355 1356 rc = ibmvnic_init(adapter); 1357 if (rc) 1358 return 0; 1359 1360 /* If the adapter was in PROBE state prior to the reset, 1361 * exit here. 1362 */ 1363 if (reset_state == VNIC_PROBED) 1364 return 0; 1365 1366 rc = ibmvnic_login(netdev); 1367 if (rc) { 1368 adapter->state = VNIC_PROBED; 1369 return 0; 1370 } 1371 1372 rc = reset_tx_pools(adapter); 1373 if (rc) 1374 return rc; 1375 1376 rc = reset_rx_pools(adapter); 1377 if (rc) 1378 return rc; 1379 1380 if (reset_state == VNIC_CLOSED) 1381 return 0; 1382 } 1383 1384 rc = __ibmvnic_open(netdev); 1385 if (rc) { 1386 if (list_empty(&adapter->rwi_list)) 1387 adapter->state = VNIC_CLOSED; 1388 else 1389 adapter->state = reset_state; 1390 1391 return 0; 1392 } 1393 1394 netif_carrier_on(netdev); 1395 1396 /* kick napi */ 1397 for (i = 0; i < adapter->req_rx_queues; i++) 1398 napi_schedule(&adapter->napi[i]); 1399 1400 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1401 netdev_notify_peers(netdev); 1402 1403 return 0; 1404 } 1405 1406 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1407 { 1408 struct ibmvnic_rwi *rwi; 1409 1410 mutex_lock(&adapter->rwi_lock); 1411 1412 if (!list_empty(&adapter->rwi_list)) { 1413 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1414 list); 1415 list_del(&rwi->list); 1416 } else { 1417 rwi = NULL; 1418 } 1419 1420 mutex_unlock(&adapter->rwi_lock); 1421 return rwi; 1422 } 1423 1424 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1425 { 1426 struct ibmvnic_rwi *rwi; 1427 1428 rwi = get_next_rwi(adapter); 1429 while (rwi) { 1430 kfree(rwi); 1431 rwi = get_next_rwi(adapter); 1432 } 1433 } 1434 1435 static void __ibmvnic_reset(struct work_struct *work) 1436 { 1437 struct ibmvnic_rwi *rwi; 1438 struct ibmvnic_adapter *adapter; 1439 struct net_device *netdev; 1440 u32 reset_state; 1441 int rc; 1442 1443 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1444 netdev = adapter->netdev; 1445 1446 mutex_lock(&adapter->reset_lock); 1447 adapter->resetting = true; 1448 reset_state = adapter->state; 1449 1450 rwi = get_next_rwi(adapter); 1451 while (rwi) { 1452 rc = do_reset(adapter, rwi, reset_state); 1453 kfree(rwi); 1454 if (rc) 1455 break; 1456 1457 rwi = get_next_rwi(adapter); 1458 } 1459 1460 if (rc) { 1461 free_all_rwi(adapter); 1462 mutex_unlock(&adapter->reset_lock); 1463 return; 1464 } 1465 1466 adapter->resetting = false; 1467 mutex_unlock(&adapter->reset_lock); 1468 } 1469 1470 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1471 enum ibmvnic_reset_reason reason) 1472 { 1473 struct ibmvnic_rwi *rwi, *tmp; 1474 struct net_device *netdev = adapter->netdev; 1475 struct list_head *entry; 1476 1477 if (adapter->state == VNIC_REMOVING || 1478 adapter->state == VNIC_REMOVED) { 1479 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1480 return; 1481 } 1482 1483 if (adapter->state == VNIC_PROBING) { 1484 netdev_warn(netdev, "Adapter reset during probe\n"); 1485 adapter->init_done_rc = EAGAIN; 1486 return; 1487 } 1488 1489 mutex_lock(&adapter->rwi_lock); 1490 1491 list_for_each(entry, &adapter->rwi_list) { 1492 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1493 if (tmp->reset_reason == reason) { 1494 netdev_err(netdev, "Matching reset found, skipping\n"); 1495 mutex_unlock(&adapter->rwi_lock); 1496 return; 1497 } 1498 } 1499 1500 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1501 if (!rwi) { 1502 mutex_unlock(&adapter->rwi_lock); 1503 ibmvnic_close(netdev); 1504 return; 1505 } 1506 1507 rwi->reset_reason = reason; 1508 list_add_tail(&rwi->list, &adapter->rwi_list); 1509 mutex_unlock(&adapter->rwi_lock); 1510 schedule_work(&adapter->ibmvnic_reset); 1511 } 1512 1513 static void ibmvnic_tx_timeout(struct net_device *dev) 1514 { 1515 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1516 1517 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1518 } 1519 1520 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1521 struct ibmvnic_rx_buff *rx_buff) 1522 { 1523 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1524 1525 rx_buff->skb = NULL; 1526 1527 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1528 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1529 1530 atomic_dec(&pool->available); 1531 } 1532 1533 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1534 { 1535 struct net_device *netdev = napi->dev; 1536 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1537 int scrq_num = (int)(napi - adapter->napi); 1538 int frames_processed = 0; 1539 1540 restart_poll: 1541 while (frames_processed < budget) { 1542 struct sk_buff *skb; 1543 struct ibmvnic_rx_buff *rx_buff; 1544 union sub_crq *next; 1545 u32 length; 1546 u16 offset; 1547 u8 flags = 0; 1548 1549 if (unlikely(adapter->resetting)) { 1550 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1551 napi_complete_done(napi, frames_processed); 1552 return frames_processed; 1553 } 1554 1555 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1556 break; 1557 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1558 rx_buff = 1559 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1560 rx_comp.correlator); 1561 /* do error checking */ 1562 if (next->rx_comp.rc) { 1563 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1564 /* free the entry */ 1565 next->rx_comp.first = 0; 1566 remove_buff_from_pool(adapter, rx_buff); 1567 continue; 1568 } 1569 1570 length = be32_to_cpu(next->rx_comp.len); 1571 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1572 flags = next->rx_comp.flags; 1573 skb = rx_buff->skb; 1574 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1575 length); 1576 1577 /* VLAN Header has been stripped by the system firmware and 1578 * needs to be inserted by the driver 1579 */ 1580 if (adapter->rx_vlan_header_insertion && 1581 (flags & IBMVNIC_VLAN_STRIPPED)) 1582 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1583 ntohs(next->rx_comp.vlan_tci)); 1584 1585 /* free the entry */ 1586 next->rx_comp.first = 0; 1587 remove_buff_from_pool(adapter, rx_buff); 1588 1589 skb_put(skb, length); 1590 skb->protocol = eth_type_trans(skb, netdev); 1591 skb_record_rx_queue(skb, scrq_num); 1592 1593 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1594 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1595 skb->ip_summed = CHECKSUM_UNNECESSARY; 1596 } 1597 1598 length = skb->len; 1599 napi_gro_receive(napi, skb); /* send it up */ 1600 netdev->stats.rx_packets++; 1601 netdev->stats.rx_bytes += length; 1602 frames_processed++; 1603 } 1604 1605 if (adapter->state != VNIC_CLOSING) 1606 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1607 1608 if (frames_processed < budget) { 1609 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1610 napi_complete_done(napi, frames_processed); 1611 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1612 napi_reschedule(napi)) { 1613 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1614 goto restart_poll; 1615 } 1616 } 1617 return frames_processed; 1618 } 1619 1620 #ifdef CONFIG_NET_POLL_CONTROLLER 1621 static void ibmvnic_netpoll_controller(struct net_device *dev) 1622 { 1623 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1624 int i; 1625 1626 replenish_pools(netdev_priv(dev)); 1627 for (i = 0; i < adapter->req_rx_queues; i++) 1628 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1629 adapter->rx_scrq[i]); 1630 } 1631 #endif 1632 1633 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 1634 { 1635 return -EOPNOTSUPP; 1636 } 1637 1638 static const struct net_device_ops ibmvnic_netdev_ops = { 1639 .ndo_open = ibmvnic_open, 1640 .ndo_stop = ibmvnic_close, 1641 .ndo_start_xmit = ibmvnic_xmit, 1642 .ndo_set_rx_mode = ibmvnic_set_multi, 1643 .ndo_set_mac_address = ibmvnic_set_mac, 1644 .ndo_validate_addr = eth_validate_addr, 1645 .ndo_tx_timeout = ibmvnic_tx_timeout, 1646 #ifdef CONFIG_NET_POLL_CONTROLLER 1647 .ndo_poll_controller = ibmvnic_netpoll_controller, 1648 #endif 1649 .ndo_change_mtu = ibmvnic_change_mtu, 1650 }; 1651 1652 /* ethtool functions */ 1653 1654 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1655 struct ethtool_link_ksettings *cmd) 1656 { 1657 u32 supported, advertising; 1658 1659 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1660 SUPPORTED_FIBRE); 1661 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1662 ADVERTISED_FIBRE); 1663 cmd->base.speed = SPEED_1000; 1664 cmd->base.duplex = DUPLEX_FULL; 1665 cmd->base.port = PORT_FIBRE; 1666 cmd->base.phy_address = 0; 1667 cmd->base.autoneg = AUTONEG_ENABLE; 1668 1669 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1670 supported); 1671 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1672 advertising); 1673 1674 return 0; 1675 } 1676 1677 static void ibmvnic_get_drvinfo(struct net_device *dev, 1678 struct ethtool_drvinfo *info) 1679 { 1680 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1681 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1682 } 1683 1684 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1685 { 1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1687 1688 return adapter->msg_enable; 1689 } 1690 1691 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1692 { 1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1694 1695 adapter->msg_enable = data; 1696 } 1697 1698 static u32 ibmvnic_get_link(struct net_device *netdev) 1699 { 1700 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1701 1702 /* Don't need to send a query because we request a logical link up at 1703 * init and then we wait for link state indications 1704 */ 1705 return adapter->logical_link_state; 1706 } 1707 1708 static void ibmvnic_get_ringparam(struct net_device *netdev, 1709 struct ethtool_ringparam *ring) 1710 { 1711 ring->rx_max_pending = 0; 1712 ring->tx_max_pending = 0; 1713 ring->rx_mini_max_pending = 0; 1714 ring->rx_jumbo_max_pending = 0; 1715 ring->rx_pending = 0; 1716 ring->tx_pending = 0; 1717 ring->rx_mini_pending = 0; 1718 ring->rx_jumbo_pending = 0; 1719 } 1720 1721 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1722 { 1723 int i; 1724 1725 if (stringset != ETH_SS_STATS) 1726 return; 1727 1728 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1729 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1730 } 1731 1732 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1733 { 1734 switch (sset) { 1735 case ETH_SS_STATS: 1736 return ARRAY_SIZE(ibmvnic_stats); 1737 default: 1738 return -EOPNOTSUPP; 1739 } 1740 } 1741 1742 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1743 struct ethtool_stats *stats, u64 *data) 1744 { 1745 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1746 union ibmvnic_crq crq; 1747 int i; 1748 1749 memset(&crq, 0, sizeof(crq)); 1750 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1751 crq.request_statistics.cmd = REQUEST_STATISTICS; 1752 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1753 crq.request_statistics.len = 1754 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1755 1756 /* Wait for data to be written */ 1757 init_completion(&adapter->stats_done); 1758 ibmvnic_send_crq(adapter, &crq); 1759 wait_for_completion(&adapter->stats_done); 1760 1761 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1762 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1763 } 1764 1765 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1766 .get_drvinfo = ibmvnic_get_drvinfo, 1767 .get_msglevel = ibmvnic_get_msglevel, 1768 .set_msglevel = ibmvnic_set_msglevel, 1769 .get_link = ibmvnic_get_link, 1770 .get_ringparam = ibmvnic_get_ringparam, 1771 .get_strings = ibmvnic_get_strings, 1772 .get_sset_count = ibmvnic_get_sset_count, 1773 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1774 .get_link_ksettings = ibmvnic_get_link_ksettings, 1775 }; 1776 1777 /* Routines for managing CRQs/sCRQs */ 1778 1779 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 1780 struct ibmvnic_sub_crq_queue *scrq) 1781 { 1782 int rc; 1783 1784 if (scrq->irq) { 1785 free_irq(scrq->irq, scrq); 1786 irq_dispose_mapping(scrq->irq); 1787 scrq->irq = 0; 1788 } 1789 1790 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1791 scrq->cur = 0; 1792 1793 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1794 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1795 return rc; 1796 } 1797 1798 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 1799 { 1800 int i, rc; 1801 1802 for (i = 0; i < adapter->req_tx_queues; i++) { 1803 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1804 if (rc) 1805 return rc; 1806 } 1807 1808 for (i = 0; i < adapter->req_rx_queues; i++) { 1809 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1810 if (rc) 1811 return rc; 1812 } 1813 1814 return rc; 1815 } 1816 1817 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1818 struct ibmvnic_sub_crq_queue *scrq) 1819 { 1820 struct device *dev = &adapter->vdev->dev; 1821 long rc; 1822 1823 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1824 1825 /* Close the sub-crqs */ 1826 do { 1827 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1828 adapter->vdev->unit_address, 1829 scrq->crq_num); 1830 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1831 1832 if (rc) { 1833 netdev_err(adapter->netdev, 1834 "Failed to release sub-CRQ %16lx, rc = %ld\n", 1835 scrq->crq_num, rc); 1836 } 1837 1838 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1839 DMA_BIDIRECTIONAL); 1840 free_pages((unsigned long)scrq->msgs, 2); 1841 kfree(scrq); 1842 } 1843 1844 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1845 *adapter) 1846 { 1847 struct device *dev = &adapter->vdev->dev; 1848 struct ibmvnic_sub_crq_queue *scrq; 1849 int rc; 1850 1851 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 1852 if (!scrq) 1853 return NULL; 1854 1855 scrq->msgs = 1856 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 1857 if (!scrq->msgs) { 1858 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1859 goto zero_page_failed; 1860 } 1861 1862 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1863 DMA_BIDIRECTIONAL); 1864 if (dma_mapping_error(dev, scrq->msg_token)) { 1865 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1866 goto map_failed; 1867 } 1868 1869 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1870 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1871 1872 if (rc == H_RESOURCE) 1873 rc = ibmvnic_reset_crq(adapter); 1874 1875 if (rc == H_CLOSED) { 1876 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1877 } else if (rc) { 1878 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1879 goto reg_failed; 1880 } 1881 1882 scrq->adapter = adapter; 1883 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1884 spin_lock_init(&scrq->lock); 1885 1886 netdev_dbg(adapter->netdev, 1887 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1888 scrq->crq_num, scrq->hw_irq, scrq->irq); 1889 1890 return scrq; 1891 1892 reg_failed: 1893 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1894 DMA_BIDIRECTIONAL); 1895 map_failed: 1896 free_pages((unsigned long)scrq->msgs, 2); 1897 zero_page_failed: 1898 kfree(scrq); 1899 1900 return NULL; 1901 } 1902 1903 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1904 { 1905 int i; 1906 1907 if (adapter->tx_scrq) { 1908 for (i = 0; i < adapter->req_tx_queues; i++) { 1909 if (!adapter->tx_scrq[i]) 1910 continue; 1911 1912 if (adapter->tx_scrq[i]->irq) { 1913 free_irq(adapter->tx_scrq[i]->irq, 1914 adapter->tx_scrq[i]); 1915 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1916 adapter->tx_scrq[i]->irq = 0; 1917 } 1918 1919 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1920 } 1921 1922 kfree(adapter->tx_scrq); 1923 adapter->tx_scrq = NULL; 1924 } 1925 1926 if (adapter->rx_scrq) { 1927 for (i = 0; i < adapter->req_rx_queues; i++) { 1928 if (!adapter->rx_scrq[i]) 1929 continue; 1930 1931 if (adapter->rx_scrq[i]->irq) { 1932 free_irq(adapter->rx_scrq[i]->irq, 1933 adapter->rx_scrq[i]); 1934 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1935 adapter->rx_scrq[i]->irq = 0; 1936 } 1937 1938 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1939 } 1940 1941 kfree(adapter->rx_scrq); 1942 adapter->rx_scrq = NULL; 1943 } 1944 } 1945 1946 static int disable_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 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1953 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1954 if (rc) 1955 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1956 scrq->hw_irq, rc); 1957 return rc; 1958 } 1959 1960 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1961 struct ibmvnic_sub_crq_queue *scrq) 1962 { 1963 struct device *dev = &adapter->vdev->dev; 1964 unsigned long rc; 1965 1966 if (scrq->hw_irq > 0x100000000ULL) { 1967 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1968 return 1; 1969 } 1970 1971 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1972 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1973 if (rc) 1974 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1975 scrq->hw_irq, rc); 1976 return rc; 1977 } 1978 1979 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1980 struct ibmvnic_sub_crq_queue *scrq) 1981 { 1982 struct device *dev = &adapter->vdev->dev; 1983 struct ibmvnic_tx_buff *txbuff; 1984 union sub_crq *next; 1985 int index; 1986 int i, j; 1987 u8 first; 1988 1989 restart_loop: 1990 while (pending_scrq(adapter, scrq)) { 1991 unsigned int pool = scrq->pool_index; 1992 1993 next = ibmvnic_next_scrq(adapter, scrq); 1994 for (i = 0; i < next->tx_comp.num_comps; i++) { 1995 if (next->tx_comp.rcs[i]) { 1996 dev_err(dev, "tx error %x\n", 1997 next->tx_comp.rcs[i]); 1998 continue; 1999 } 2000 index = be32_to_cpu(next->tx_comp.correlators[i]); 2001 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 2002 2003 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2004 if (!txbuff->data_dma[j]) 2005 continue; 2006 2007 txbuff->data_dma[j] = 0; 2008 } 2009 /* if sub_crq was sent indirectly */ 2010 first = txbuff->indir_arr[0].generic.first; 2011 if (first == IBMVNIC_CRQ_CMD) { 2012 dma_unmap_single(dev, txbuff->indir_dma, 2013 sizeof(txbuff->indir_arr), 2014 DMA_TO_DEVICE); 2015 } 2016 2017 if (txbuff->last_frag) { 2018 dev_kfree_skb_any(txbuff->skb); 2019 txbuff->skb = NULL; 2020 } 2021 2022 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2023 producer_index] = index; 2024 adapter->tx_pool[pool].producer_index = 2025 (adapter->tx_pool[pool].producer_index + 1) % 2026 adapter->req_tx_entries_per_subcrq; 2027 } 2028 /* remove tx_comp scrq*/ 2029 next->tx_comp.first = 0; 2030 2031 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 2032 (adapter->req_tx_entries_per_subcrq / 2) && 2033 __netif_subqueue_stopped(adapter->netdev, 2034 scrq->pool_index)) { 2035 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2036 netdev_info(adapter->netdev, "Started queue %d\n", 2037 scrq->pool_index); 2038 } 2039 } 2040 2041 enable_scrq_irq(adapter, scrq); 2042 2043 if (pending_scrq(adapter, scrq)) { 2044 disable_scrq_irq(adapter, scrq); 2045 goto restart_loop; 2046 } 2047 2048 return 0; 2049 } 2050 2051 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2052 { 2053 struct ibmvnic_sub_crq_queue *scrq = instance; 2054 struct ibmvnic_adapter *adapter = scrq->adapter; 2055 2056 disable_scrq_irq(adapter, scrq); 2057 ibmvnic_complete_tx(adapter, scrq); 2058 2059 return IRQ_HANDLED; 2060 } 2061 2062 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2063 { 2064 struct ibmvnic_sub_crq_queue *scrq = instance; 2065 struct ibmvnic_adapter *adapter = scrq->adapter; 2066 2067 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2068 disable_scrq_irq(adapter, scrq); 2069 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2070 } 2071 2072 return IRQ_HANDLED; 2073 } 2074 2075 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2076 { 2077 struct device *dev = &adapter->vdev->dev; 2078 struct ibmvnic_sub_crq_queue *scrq; 2079 int i = 0, j = 0; 2080 int rc = 0; 2081 2082 for (i = 0; i < adapter->req_tx_queues; i++) { 2083 scrq = adapter->tx_scrq[i]; 2084 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2085 2086 if (!scrq->irq) { 2087 rc = -EINVAL; 2088 dev_err(dev, "Error mapping irq\n"); 2089 goto req_tx_irq_failed; 2090 } 2091 2092 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2093 0, "ibmvnic_tx", scrq); 2094 2095 if (rc) { 2096 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2097 scrq->irq, rc); 2098 irq_dispose_mapping(scrq->irq); 2099 goto req_rx_irq_failed; 2100 } 2101 } 2102 2103 for (i = 0; i < adapter->req_rx_queues; i++) { 2104 scrq = adapter->rx_scrq[i]; 2105 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2106 if (!scrq->irq) { 2107 rc = -EINVAL; 2108 dev_err(dev, "Error mapping irq\n"); 2109 goto req_rx_irq_failed; 2110 } 2111 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2112 0, "ibmvnic_rx", scrq); 2113 if (rc) { 2114 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2115 scrq->irq, rc); 2116 irq_dispose_mapping(scrq->irq); 2117 goto req_rx_irq_failed; 2118 } 2119 } 2120 return rc; 2121 2122 req_rx_irq_failed: 2123 for (j = 0; j < i; j++) { 2124 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2125 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2126 } 2127 i = adapter->req_tx_queues; 2128 req_tx_irq_failed: 2129 for (j = 0; j < i; j++) { 2130 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2131 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2132 } 2133 release_sub_crqs(adapter); 2134 return rc; 2135 } 2136 2137 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2138 { 2139 struct device *dev = &adapter->vdev->dev; 2140 struct ibmvnic_sub_crq_queue **allqueues; 2141 int registered_queues = 0; 2142 int total_queues; 2143 int more = 0; 2144 int i; 2145 2146 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2147 2148 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2149 if (!allqueues) 2150 return -1; 2151 2152 for (i = 0; i < total_queues; i++) { 2153 allqueues[i] = init_sub_crq_queue(adapter); 2154 if (!allqueues[i]) { 2155 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2156 break; 2157 } 2158 registered_queues++; 2159 } 2160 2161 /* Make sure we were able to register the minimum number of queues */ 2162 if (registered_queues < 2163 adapter->min_tx_queues + adapter->min_rx_queues) { 2164 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2165 goto tx_failed; 2166 } 2167 2168 /* Distribute the failed allocated queues*/ 2169 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2170 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2171 switch (i % 3) { 2172 case 0: 2173 if (adapter->req_rx_queues > adapter->min_rx_queues) 2174 adapter->req_rx_queues--; 2175 else 2176 more++; 2177 break; 2178 case 1: 2179 if (adapter->req_tx_queues > adapter->min_tx_queues) 2180 adapter->req_tx_queues--; 2181 else 2182 more++; 2183 break; 2184 } 2185 } 2186 2187 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2188 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2189 if (!adapter->tx_scrq) 2190 goto tx_failed; 2191 2192 for (i = 0; i < adapter->req_tx_queues; i++) { 2193 adapter->tx_scrq[i] = allqueues[i]; 2194 adapter->tx_scrq[i]->pool_index = i; 2195 } 2196 2197 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2198 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2199 if (!adapter->rx_scrq) 2200 goto rx_failed; 2201 2202 for (i = 0; i < adapter->req_rx_queues; i++) { 2203 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2204 adapter->rx_scrq[i]->scrq_num = i; 2205 } 2206 2207 kfree(allqueues); 2208 return 0; 2209 2210 rx_failed: 2211 kfree(adapter->tx_scrq); 2212 adapter->tx_scrq = NULL; 2213 tx_failed: 2214 for (i = 0; i < registered_queues; i++) 2215 release_sub_crq_queue(adapter, allqueues[i]); 2216 kfree(allqueues); 2217 return -1; 2218 } 2219 2220 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2221 { 2222 struct device *dev = &adapter->vdev->dev; 2223 union ibmvnic_crq crq; 2224 2225 if (!retry) { 2226 /* Sub-CRQ entries are 32 byte long */ 2227 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2228 2229 if (adapter->min_tx_entries_per_subcrq > entries_page || 2230 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2231 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2232 return; 2233 } 2234 2235 /* Get the minimum between the queried max and the entries 2236 * that fit in our PAGE_SIZE 2237 */ 2238 adapter->req_tx_entries_per_subcrq = 2239 adapter->max_tx_entries_per_subcrq > entries_page ? 2240 entries_page : adapter->max_tx_entries_per_subcrq; 2241 adapter->req_rx_add_entries_per_subcrq = 2242 adapter->max_rx_add_entries_per_subcrq > entries_page ? 2243 entries_page : adapter->max_rx_add_entries_per_subcrq; 2244 2245 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 2246 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 2247 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2248 2249 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2250 } 2251 2252 memset(&crq, 0, sizeof(crq)); 2253 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2254 crq.request_capability.cmd = REQUEST_CAPABILITY; 2255 2256 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2257 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2258 atomic_inc(&adapter->running_cap_crqs); 2259 ibmvnic_send_crq(adapter, &crq); 2260 2261 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2262 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2263 atomic_inc(&adapter->running_cap_crqs); 2264 ibmvnic_send_crq(adapter, &crq); 2265 2266 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2267 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2268 atomic_inc(&adapter->running_cap_crqs); 2269 ibmvnic_send_crq(adapter, &crq); 2270 2271 crq.request_capability.capability = 2272 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2273 crq.request_capability.number = 2274 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2275 atomic_inc(&adapter->running_cap_crqs); 2276 ibmvnic_send_crq(adapter, &crq); 2277 2278 crq.request_capability.capability = 2279 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2280 crq.request_capability.number = 2281 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2282 atomic_inc(&adapter->running_cap_crqs); 2283 ibmvnic_send_crq(adapter, &crq); 2284 2285 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2286 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2287 atomic_inc(&adapter->running_cap_crqs); 2288 ibmvnic_send_crq(adapter, &crq); 2289 2290 if (adapter->netdev->flags & IFF_PROMISC) { 2291 if (adapter->promisc_supported) { 2292 crq.request_capability.capability = 2293 cpu_to_be16(PROMISC_REQUESTED); 2294 crq.request_capability.number = cpu_to_be64(1); 2295 atomic_inc(&adapter->running_cap_crqs); 2296 ibmvnic_send_crq(adapter, &crq); 2297 } 2298 } else { 2299 crq.request_capability.capability = 2300 cpu_to_be16(PROMISC_REQUESTED); 2301 crq.request_capability.number = cpu_to_be64(0); 2302 atomic_inc(&adapter->running_cap_crqs); 2303 ibmvnic_send_crq(adapter, &crq); 2304 } 2305 } 2306 2307 static int pending_scrq(struct ibmvnic_adapter *adapter, 2308 struct ibmvnic_sub_crq_queue *scrq) 2309 { 2310 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2311 2312 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2313 return 1; 2314 else 2315 return 0; 2316 } 2317 2318 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2319 struct ibmvnic_sub_crq_queue *scrq) 2320 { 2321 union sub_crq *entry; 2322 unsigned long flags; 2323 2324 spin_lock_irqsave(&scrq->lock, flags); 2325 entry = &scrq->msgs[scrq->cur]; 2326 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2327 if (++scrq->cur == scrq->size) 2328 scrq->cur = 0; 2329 } else { 2330 entry = NULL; 2331 } 2332 spin_unlock_irqrestore(&scrq->lock, flags); 2333 2334 return entry; 2335 } 2336 2337 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2338 { 2339 struct ibmvnic_crq_queue *queue = &adapter->crq; 2340 union ibmvnic_crq *crq; 2341 2342 crq = &queue->msgs[queue->cur]; 2343 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2344 if (++queue->cur == queue->size) 2345 queue->cur = 0; 2346 } else { 2347 crq = NULL; 2348 } 2349 2350 return crq; 2351 } 2352 2353 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2354 union sub_crq *sub_crq) 2355 { 2356 unsigned int ua = adapter->vdev->unit_address; 2357 struct device *dev = &adapter->vdev->dev; 2358 u64 *u64_crq = (u64 *)sub_crq; 2359 int rc; 2360 2361 netdev_dbg(adapter->netdev, 2362 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2363 (unsigned long int)cpu_to_be64(remote_handle), 2364 (unsigned long int)cpu_to_be64(u64_crq[0]), 2365 (unsigned long int)cpu_to_be64(u64_crq[1]), 2366 (unsigned long int)cpu_to_be64(u64_crq[2]), 2367 (unsigned long int)cpu_to_be64(u64_crq[3])); 2368 2369 /* Make sure the hypervisor sees the complete request */ 2370 mb(); 2371 2372 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2373 cpu_to_be64(remote_handle), 2374 cpu_to_be64(u64_crq[0]), 2375 cpu_to_be64(u64_crq[1]), 2376 cpu_to_be64(u64_crq[2]), 2377 cpu_to_be64(u64_crq[3])); 2378 2379 if (rc) { 2380 if (rc == H_CLOSED) 2381 dev_warn(dev, "CRQ Queue closed\n"); 2382 dev_err(dev, "Send error (rc=%d)\n", rc); 2383 } 2384 2385 return rc; 2386 } 2387 2388 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2389 u64 remote_handle, u64 ioba, u64 num_entries) 2390 { 2391 unsigned int ua = adapter->vdev->unit_address; 2392 struct device *dev = &adapter->vdev->dev; 2393 int rc; 2394 2395 /* Make sure the hypervisor sees the complete request */ 2396 mb(); 2397 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2398 cpu_to_be64(remote_handle), 2399 ioba, num_entries); 2400 2401 if (rc) { 2402 if (rc == H_CLOSED) 2403 dev_warn(dev, "CRQ Queue closed\n"); 2404 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2405 } 2406 2407 return rc; 2408 } 2409 2410 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2411 union ibmvnic_crq *crq) 2412 { 2413 unsigned int ua = adapter->vdev->unit_address; 2414 struct device *dev = &adapter->vdev->dev; 2415 u64 *u64_crq = (u64 *)crq; 2416 int rc; 2417 2418 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2419 (unsigned long int)cpu_to_be64(u64_crq[0]), 2420 (unsigned long int)cpu_to_be64(u64_crq[1])); 2421 2422 /* Make sure the hypervisor sees the complete request */ 2423 mb(); 2424 2425 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2426 cpu_to_be64(u64_crq[0]), 2427 cpu_to_be64(u64_crq[1])); 2428 2429 if (rc) { 2430 if (rc == H_CLOSED) 2431 dev_warn(dev, "CRQ Queue closed\n"); 2432 dev_warn(dev, "Send error (rc=%d)\n", rc); 2433 } 2434 2435 return rc; 2436 } 2437 2438 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2439 { 2440 union ibmvnic_crq crq; 2441 2442 memset(&crq, 0, sizeof(crq)); 2443 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2444 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2445 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2446 2447 return ibmvnic_send_crq(adapter, &crq); 2448 } 2449 2450 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2451 { 2452 union ibmvnic_crq crq; 2453 2454 memset(&crq, 0, sizeof(crq)); 2455 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2456 crq.version_exchange.cmd = VERSION_EXCHANGE; 2457 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2458 2459 return ibmvnic_send_crq(adapter, &crq); 2460 } 2461 2462 static void send_login(struct ibmvnic_adapter *adapter) 2463 { 2464 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2465 struct ibmvnic_login_buffer *login_buffer; 2466 struct device *dev = &adapter->vdev->dev; 2467 dma_addr_t rsp_buffer_token; 2468 dma_addr_t buffer_token; 2469 size_t rsp_buffer_size; 2470 union ibmvnic_crq crq; 2471 size_t buffer_size; 2472 __be64 *tx_list_p; 2473 __be64 *rx_list_p; 2474 int i; 2475 2476 buffer_size = 2477 sizeof(struct ibmvnic_login_buffer) + 2478 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 2479 2480 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 2481 if (!login_buffer) 2482 goto buf_alloc_failed; 2483 2484 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2485 DMA_TO_DEVICE); 2486 if (dma_mapping_error(dev, buffer_token)) { 2487 dev_err(dev, "Couldn't map login buffer\n"); 2488 goto buf_map_failed; 2489 } 2490 2491 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2492 sizeof(u64) * adapter->req_tx_queues + 2493 sizeof(u64) * adapter->req_rx_queues + 2494 sizeof(u64) * adapter->req_rx_queues + 2495 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2496 2497 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2498 if (!login_rsp_buffer) 2499 goto buf_rsp_alloc_failed; 2500 2501 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2502 rsp_buffer_size, DMA_FROM_DEVICE); 2503 if (dma_mapping_error(dev, rsp_buffer_token)) { 2504 dev_err(dev, "Couldn't map login rsp buffer\n"); 2505 goto buf_rsp_map_failed; 2506 } 2507 2508 adapter->login_buf = login_buffer; 2509 adapter->login_buf_token = buffer_token; 2510 adapter->login_buf_sz = buffer_size; 2511 adapter->login_rsp_buf = login_rsp_buffer; 2512 adapter->login_rsp_buf_token = rsp_buffer_token; 2513 adapter->login_rsp_buf_sz = rsp_buffer_size; 2514 2515 login_buffer->len = cpu_to_be32(buffer_size); 2516 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2517 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2518 login_buffer->off_txcomp_subcrqs = 2519 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2520 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2521 login_buffer->off_rxcomp_subcrqs = 2522 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2523 sizeof(u64) * adapter->req_tx_queues); 2524 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2525 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2526 2527 tx_list_p = (__be64 *)((char *)login_buffer + 2528 sizeof(struct ibmvnic_login_buffer)); 2529 rx_list_p = (__be64 *)((char *)login_buffer + 2530 sizeof(struct ibmvnic_login_buffer) + 2531 sizeof(u64) * adapter->req_tx_queues); 2532 2533 for (i = 0; i < adapter->req_tx_queues; i++) { 2534 if (adapter->tx_scrq[i]) { 2535 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2536 crq_num); 2537 } 2538 } 2539 2540 for (i = 0; i < adapter->req_rx_queues; i++) { 2541 if (adapter->rx_scrq[i]) { 2542 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2543 crq_num); 2544 } 2545 } 2546 2547 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2548 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2549 netdev_dbg(adapter->netdev, "%016lx\n", 2550 ((unsigned long int *)(adapter->login_buf))[i]); 2551 } 2552 2553 memset(&crq, 0, sizeof(crq)); 2554 crq.login.first = IBMVNIC_CRQ_CMD; 2555 crq.login.cmd = LOGIN; 2556 crq.login.ioba = cpu_to_be32(buffer_token); 2557 crq.login.len = cpu_to_be32(buffer_size); 2558 ibmvnic_send_crq(adapter, &crq); 2559 2560 return; 2561 2562 buf_rsp_map_failed: 2563 kfree(login_rsp_buffer); 2564 buf_rsp_alloc_failed: 2565 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2566 buf_map_failed: 2567 kfree(login_buffer); 2568 buf_alloc_failed: 2569 return; 2570 } 2571 2572 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2573 u32 len, u8 map_id) 2574 { 2575 union ibmvnic_crq crq; 2576 2577 memset(&crq, 0, sizeof(crq)); 2578 crq.request_map.first = IBMVNIC_CRQ_CMD; 2579 crq.request_map.cmd = REQUEST_MAP; 2580 crq.request_map.map_id = map_id; 2581 crq.request_map.ioba = cpu_to_be32(addr); 2582 crq.request_map.len = cpu_to_be32(len); 2583 ibmvnic_send_crq(adapter, &crq); 2584 } 2585 2586 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2587 { 2588 union ibmvnic_crq crq; 2589 2590 memset(&crq, 0, sizeof(crq)); 2591 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2592 crq.request_unmap.cmd = REQUEST_UNMAP; 2593 crq.request_unmap.map_id = map_id; 2594 ibmvnic_send_crq(adapter, &crq); 2595 } 2596 2597 static void send_map_query(struct ibmvnic_adapter *adapter) 2598 { 2599 union ibmvnic_crq crq; 2600 2601 memset(&crq, 0, sizeof(crq)); 2602 crq.query_map.first = IBMVNIC_CRQ_CMD; 2603 crq.query_map.cmd = QUERY_MAP; 2604 ibmvnic_send_crq(adapter, &crq); 2605 } 2606 2607 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2608 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2609 { 2610 union ibmvnic_crq crq; 2611 2612 atomic_set(&adapter->running_cap_crqs, 0); 2613 memset(&crq, 0, sizeof(crq)); 2614 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2615 crq.query_capability.cmd = QUERY_CAPABILITY; 2616 2617 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2618 atomic_inc(&adapter->running_cap_crqs); 2619 ibmvnic_send_crq(adapter, &crq); 2620 2621 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2622 atomic_inc(&adapter->running_cap_crqs); 2623 ibmvnic_send_crq(adapter, &crq); 2624 2625 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2626 atomic_inc(&adapter->running_cap_crqs); 2627 ibmvnic_send_crq(adapter, &crq); 2628 2629 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2630 atomic_inc(&adapter->running_cap_crqs); 2631 ibmvnic_send_crq(adapter, &crq); 2632 2633 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2634 atomic_inc(&adapter->running_cap_crqs); 2635 ibmvnic_send_crq(adapter, &crq); 2636 2637 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2638 atomic_inc(&adapter->running_cap_crqs); 2639 ibmvnic_send_crq(adapter, &crq); 2640 2641 crq.query_capability.capability = 2642 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2643 atomic_inc(&adapter->running_cap_crqs); 2644 ibmvnic_send_crq(adapter, &crq); 2645 2646 crq.query_capability.capability = 2647 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2648 atomic_inc(&adapter->running_cap_crqs); 2649 ibmvnic_send_crq(adapter, &crq); 2650 2651 crq.query_capability.capability = 2652 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2653 atomic_inc(&adapter->running_cap_crqs); 2654 ibmvnic_send_crq(adapter, &crq); 2655 2656 crq.query_capability.capability = 2657 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2658 atomic_inc(&adapter->running_cap_crqs); 2659 ibmvnic_send_crq(adapter, &crq); 2660 2661 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2662 atomic_inc(&adapter->running_cap_crqs); 2663 ibmvnic_send_crq(adapter, &crq); 2664 2665 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2666 atomic_inc(&adapter->running_cap_crqs); 2667 ibmvnic_send_crq(adapter, &crq); 2668 2669 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2670 atomic_inc(&adapter->running_cap_crqs); 2671 ibmvnic_send_crq(adapter, &crq); 2672 2673 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2674 atomic_inc(&adapter->running_cap_crqs); 2675 ibmvnic_send_crq(adapter, &crq); 2676 2677 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2678 atomic_inc(&adapter->running_cap_crqs); 2679 ibmvnic_send_crq(adapter, &crq); 2680 2681 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2682 atomic_inc(&adapter->running_cap_crqs); 2683 ibmvnic_send_crq(adapter, &crq); 2684 2685 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 2686 atomic_inc(&adapter->running_cap_crqs); 2687 ibmvnic_send_crq(adapter, &crq); 2688 2689 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2690 atomic_inc(&adapter->running_cap_crqs); 2691 ibmvnic_send_crq(adapter, &crq); 2692 2693 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2694 atomic_inc(&adapter->running_cap_crqs); 2695 ibmvnic_send_crq(adapter, &crq); 2696 2697 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2698 atomic_inc(&adapter->running_cap_crqs); 2699 ibmvnic_send_crq(adapter, &crq); 2700 2701 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2702 atomic_inc(&adapter->running_cap_crqs); 2703 ibmvnic_send_crq(adapter, &crq); 2704 2705 crq.query_capability.capability = 2706 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2707 atomic_inc(&adapter->running_cap_crqs); 2708 ibmvnic_send_crq(adapter, &crq); 2709 2710 crq.query_capability.capability = 2711 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2712 atomic_inc(&adapter->running_cap_crqs); 2713 ibmvnic_send_crq(adapter, &crq); 2714 2715 crq.query_capability.capability = 2716 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2717 atomic_inc(&adapter->running_cap_crqs); 2718 ibmvnic_send_crq(adapter, &crq); 2719 2720 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2721 atomic_inc(&adapter->running_cap_crqs); 2722 ibmvnic_send_crq(adapter, &crq); 2723 } 2724 2725 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2726 { 2727 struct device *dev = &adapter->vdev->dev; 2728 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2729 union ibmvnic_crq crq; 2730 int i; 2731 2732 dma_unmap_single(dev, adapter->ip_offload_tok, 2733 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2734 2735 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2736 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2737 netdev_dbg(adapter->netdev, "%016lx\n", 2738 ((unsigned long int *)(buf))[i]); 2739 2740 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2741 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2742 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2743 buf->tcp_ipv4_chksum); 2744 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2745 buf->tcp_ipv6_chksum); 2746 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2747 buf->udp_ipv4_chksum); 2748 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2749 buf->udp_ipv6_chksum); 2750 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2751 buf->large_tx_ipv4); 2752 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2753 buf->large_tx_ipv6); 2754 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2755 buf->large_rx_ipv4); 2756 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2757 buf->large_rx_ipv6); 2758 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2759 buf->max_ipv4_header_size); 2760 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2761 buf->max_ipv6_header_size); 2762 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2763 buf->max_tcp_header_size); 2764 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2765 buf->max_udp_header_size); 2766 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2767 buf->max_large_tx_size); 2768 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2769 buf->max_large_rx_size); 2770 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2771 buf->ipv6_extension_header); 2772 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2773 buf->tcp_pseudosum_req); 2774 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2775 buf->num_ipv6_ext_headers); 2776 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2777 buf->off_ipv6_ext_headers); 2778 2779 adapter->ip_offload_ctrl_tok = 2780 dma_map_single(dev, &adapter->ip_offload_ctrl, 2781 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2782 2783 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2784 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2785 return; 2786 } 2787 2788 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2789 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2790 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2791 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2792 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2793 2794 /* large_tx/rx disabled for now, additional features needed */ 2795 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2796 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2797 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2798 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2799 2800 adapter->netdev->features = NETIF_F_GSO; 2801 2802 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2803 adapter->netdev->features |= NETIF_F_IP_CSUM; 2804 2805 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2806 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2807 2808 if ((adapter->netdev->features & 2809 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2810 adapter->netdev->features |= NETIF_F_RXCSUM; 2811 2812 memset(&crq, 0, sizeof(crq)); 2813 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2814 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2815 crq.control_ip_offload.len = 2816 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2817 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2818 ibmvnic_send_crq(adapter, &crq); 2819 } 2820 2821 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2822 struct ibmvnic_adapter *adapter) 2823 { 2824 struct device *dev = &adapter->vdev->dev; 2825 struct ibmvnic_error_buff *error_buff, *tmp; 2826 unsigned long flags; 2827 bool found = false; 2828 int i; 2829 2830 if (!crq->request_error_rsp.rc.code) { 2831 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2832 crq->request_error_rsp.rc.code); 2833 return; 2834 } 2835 2836 spin_lock_irqsave(&adapter->error_list_lock, flags); 2837 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2838 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2839 found = true; 2840 list_del(&error_buff->list); 2841 break; 2842 } 2843 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2844 2845 if (!found) { 2846 dev_err(dev, "Couldn't find error id %x\n", 2847 be32_to_cpu(crq->request_error_rsp.error_id)); 2848 return; 2849 } 2850 2851 dev_err(dev, "Detailed info for error id %x:", 2852 be32_to_cpu(crq->request_error_rsp.error_id)); 2853 2854 for (i = 0; i < error_buff->len; i++) { 2855 pr_cont("%02x", (int)error_buff->buff[i]); 2856 if (i % 8 == 7) 2857 pr_cont(" "); 2858 } 2859 pr_cont("\n"); 2860 2861 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2862 DMA_FROM_DEVICE); 2863 kfree(error_buff->buff); 2864 kfree(error_buff); 2865 } 2866 2867 static void request_error_information(struct ibmvnic_adapter *adapter, 2868 union ibmvnic_crq *err_crq) 2869 { 2870 struct device *dev = &adapter->vdev->dev; 2871 struct net_device *netdev = adapter->netdev; 2872 struct ibmvnic_error_buff *error_buff; 2873 unsigned long timeout = msecs_to_jiffies(30000); 2874 union ibmvnic_crq crq; 2875 unsigned long flags; 2876 int rc, detail_len; 2877 2878 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2879 if (!error_buff) 2880 return; 2881 2882 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 2883 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2884 if (!error_buff->buff) { 2885 kfree(error_buff); 2886 return; 2887 } 2888 2889 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2890 DMA_FROM_DEVICE); 2891 if (dma_mapping_error(dev, error_buff->dma)) { 2892 netdev_err(netdev, "Couldn't map error buffer\n"); 2893 kfree(error_buff->buff); 2894 kfree(error_buff); 2895 return; 2896 } 2897 2898 error_buff->len = detail_len; 2899 error_buff->error_id = err_crq->error_indication.error_id; 2900 2901 spin_lock_irqsave(&adapter->error_list_lock, flags); 2902 list_add_tail(&error_buff->list, &adapter->errors); 2903 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2904 2905 memset(&crq, 0, sizeof(crq)); 2906 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2907 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2908 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2909 crq.request_error_info.len = cpu_to_be32(detail_len); 2910 crq.request_error_info.error_id = err_crq->error_indication.error_id; 2911 2912 rc = ibmvnic_send_crq(adapter, &crq); 2913 if (rc) { 2914 netdev_err(netdev, "failed to request error information\n"); 2915 goto err_info_fail; 2916 } 2917 2918 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2919 netdev_err(netdev, "timeout waiting for error information\n"); 2920 goto err_info_fail; 2921 } 2922 2923 return; 2924 2925 err_info_fail: 2926 spin_lock_irqsave(&adapter->error_list_lock, flags); 2927 list_del(&error_buff->list); 2928 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2929 2930 kfree(error_buff->buff); 2931 kfree(error_buff); 2932 } 2933 2934 static void handle_error_indication(union ibmvnic_crq *crq, 2935 struct ibmvnic_adapter *adapter) 2936 { 2937 struct device *dev = &adapter->vdev->dev; 2938 2939 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2940 crq->error_indication.flags 2941 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2942 be32_to_cpu(crq->error_indication.error_id), 2943 be16_to_cpu(crq->error_indication.error_cause)); 2944 2945 if (be32_to_cpu(crq->error_indication.error_id)) 2946 request_error_information(adapter, crq); 2947 2948 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 2949 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2950 else 2951 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 2952 } 2953 2954 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2955 struct ibmvnic_adapter *adapter) 2956 { 2957 struct net_device *netdev = adapter->netdev; 2958 struct device *dev = &adapter->vdev->dev; 2959 long rc; 2960 2961 rc = crq->change_mac_addr_rsp.rc.code; 2962 if (rc) { 2963 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2964 return; 2965 } 2966 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2967 ETH_ALEN); 2968 } 2969 2970 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2971 struct ibmvnic_adapter *adapter) 2972 { 2973 struct device *dev = &adapter->vdev->dev; 2974 u64 *req_value; 2975 char *name; 2976 2977 atomic_dec(&adapter->running_cap_crqs); 2978 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2979 case REQ_TX_QUEUES: 2980 req_value = &adapter->req_tx_queues; 2981 name = "tx"; 2982 break; 2983 case REQ_RX_QUEUES: 2984 req_value = &adapter->req_rx_queues; 2985 name = "rx"; 2986 break; 2987 case REQ_RX_ADD_QUEUES: 2988 req_value = &adapter->req_rx_add_queues; 2989 name = "rx_add"; 2990 break; 2991 case REQ_TX_ENTRIES_PER_SUBCRQ: 2992 req_value = &adapter->req_tx_entries_per_subcrq; 2993 name = "tx_entries_per_subcrq"; 2994 break; 2995 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2996 req_value = &adapter->req_rx_add_entries_per_subcrq; 2997 name = "rx_add_entries_per_subcrq"; 2998 break; 2999 case REQ_MTU: 3000 req_value = &adapter->req_mtu; 3001 name = "mtu"; 3002 break; 3003 case PROMISC_REQUESTED: 3004 req_value = &adapter->promisc; 3005 name = "promisc"; 3006 break; 3007 default: 3008 dev_err(dev, "Got invalid cap request rsp %d\n", 3009 crq->request_capability.capability); 3010 return; 3011 } 3012 3013 switch (crq->request_capability_rsp.rc.code) { 3014 case SUCCESS: 3015 break; 3016 case PARTIALSUCCESS: 3017 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3018 *req_value, 3019 (long int)be64_to_cpu(crq->request_capability_rsp. 3020 number), name); 3021 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 3022 ibmvnic_send_req_caps(adapter, 1); 3023 return; 3024 default: 3025 dev_err(dev, "Error %d in request cap rsp\n", 3026 crq->request_capability_rsp.rc.code); 3027 return; 3028 } 3029 3030 /* Done receiving requested capabilities, query IP offload support */ 3031 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3032 union ibmvnic_crq newcrq; 3033 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3034 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3035 &adapter->ip_offload_buf; 3036 3037 adapter->wait_capability = false; 3038 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3039 buf_sz, 3040 DMA_FROM_DEVICE); 3041 3042 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3043 if (!firmware_has_feature(FW_FEATURE_CMO)) 3044 dev_err(dev, "Couldn't map offload buffer\n"); 3045 return; 3046 } 3047 3048 memset(&newcrq, 0, sizeof(newcrq)); 3049 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3050 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3051 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3052 newcrq.query_ip_offload.ioba = 3053 cpu_to_be32(adapter->ip_offload_tok); 3054 3055 ibmvnic_send_crq(adapter, &newcrq); 3056 } 3057 } 3058 3059 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3060 struct ibmvnic_adapter *adapter) 3061 { 3062 struct device *dev = &adapter->vdev->dev; 3063 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3064 struct ibmvnic_login_buffer *login = adapter->login_buf; 3065 int i; 3066 3067 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3068 DMA_BIDIRECTIONAL); 3069 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3070 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3071 3072 /* If the number of queues requested can't be allocated by the 3073 * server, the login response will return with code 1. We will need 3074 * to resend the login buffer with fewer queues requested. 3075 */ 3076 if (login_rsp_crq->generic.rc.code) { 3077 adapter->renegotiate = true; 3078 complete(&adapter->init_done); 3079 return 0; 3080 } 3081 3082 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3083 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3084 netdev_dbg(adapter->netdev, "%016lx\n", 3085 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3086 } 3087 3088 /* Sanity checks */ 3089 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3090 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3091 adapter->req_rx_add_queues != 3092 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3093 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3094 ibmvnic_remove(adapter->vdev); 3095 return -EIO; 3096 } 3097 complete(&adapter->init_done); 3098 3099 return 0; 3100 } 3101 3102 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3103 struct ibmvnic_adapter *adapter) 3104 { 3105 struct device *dev = &adapter->vdev->dev; 3106 long rc; 3107 3108 rc = crq->request_unmap_rsp.rc.code; 3109 if (rc) 3110 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3111 } 3112 3113 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3114 struct ibmvnic_adapter *adapter) 3115 { 3116 struct net_device *netdev = adapter->netdev; 3117 struct device *dev = &adapter->vdev->dev; 3118 long rc; 3119 3120 rc = crq->query_map_rsp.rc.code; 3121 if (rc) { 3122 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3123 return; 3124 } 3125 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3126 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3127 crq->query_map_rsp.free_pages); 3128 } 3129 3130 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3131 struct ibmvnic_adapter *adapter) 3132 { 3133 struct net_device *netdev = adapter->netdev; 3134 struct device *dev = &adapter->vdev->dev; 3135 long rc; 3136 3137 atomic_dec(&adapter->running_cap_crqs); 3138 netdev_dbg(netdev, "Outstanding queries: %d\n", 3139 atomic_read(&adapter->running_cap_crqs)); 3140 rc = crq->query_capability.rc.code; 3141 if (rc) { 3142 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3143 goto out; 3144 } 3145 3146 switch (be16_to_cpu(crq->query_capability.capability)) { 3147 case MIN_TX_QUEUES: 3148 adapter->min_tx_queues = 3149 be64_to_cpu(crq->query_capability.number); 3150 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3151 adapter->min_tx_queues); 3152 break; 3153 case MIN_RX_QUEUES: 3154 adapter->min_rx_queues = 3155 be64_to_cpu(crq->query_capability.number); 3156 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3157 adapter->min_rx_queues); 3158 break; 3159 case MIN_RX_ADD_QUEUES: 3160 adapter->min_rx_add_queues = 3161 be64_to_cpu(crq->query_capability.number); 3162 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3163 adapter->min_rx_add_queues); 3164 break; 3165 case MAX_TX_QUEUES: 3166 adapter->max_tx_queues = 3167 be64_to_cpu(crq->query_capability.number); 3168 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3169 adapter->max_tx_queues); 3170 break; 3171 case MAX_RX_QUEUES: 3172 adapter->max_rx_queues = 3173 be64_to_cpu(crq->query_capability.number); 3174 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3175 adapter->max_rx_queues); 3176 break; 3177 case MAX_RX_ADD_QUEUES: 3178 adapter->max_rx_add_queues = 3179 be64_to_cpu(crq->query_capability.number); 3180 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3181 adapter->max_rx_add_queues); 3182 break; 3183 case MIN_TX_ENTRIES_PER_SUBCRQ: 3184 adapter->min_tx_entries_per_subcrq = 3185 be64_to_cpu(crq->query_capability.number); 3186 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3187 adapter->min_tx_entries_per_subcrq); 3188 break; 3189 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3190 adapter->min_rx_add_entries_per_subcrq = 3191 be64_to_cpu(crq->query_capability.number); 3192 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3193 adapter->min_rx_add_entries_per_subcrq); 3194 break; 3195 case MAX_TX_ENTRIES_PER_SUBCRQ: 3196 adapter->max_tx_entries_per_subcrq = 3197 be64_to_cpu(crq->query_capability.number); 3198 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3199 adapter->max_tx_entries_per_subcrq); 3200 break; 3201 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3202 adapter->max_rx_add_entries_per_subcrq = 3203 be64_to_cpu(crq->query_capability.number); 3204 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3205 adapter->max_rx_add_entries_per_subcrq); 3206 break; 3207 case TCP_IP_OFFLOAD: 3208 adapter->tcp_ip_offload = 3209 be64_to_cpu(crq->query_capability.number); 3210 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3211 adapter->tcp_ip_offload); 3212 break; 3213 case PROMISC_SUPPORTED: 3214 adapter->promisc_supported = 3215 be64_to_cpu(crq->query_capability.number); 3216 netdev_dbg(netdev, "promisc_supported = %lld\n", 3217 adapter->promisc_supported); 3218 break; 3219 case MIN_MTU: 3220 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3221 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3222 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3223 break; 3224 case MAX_MTU: 3225 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3226 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3227 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3228 break; 3229 case MAX_MULTICAST_FILTERS: 3230 adapter->max_multicast_filters = 3231 be64_to_cpu(crq->query_capability.number); 3232 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3233 adapter->max_multicast_filters); 3234 break; 3235 case VLAN_HEADER_INSERTION: 3236 adapter->vlan_header_insertion = 3237 be64_to_cpu(crq->query_capability.number); 3238 if (adapter->vlan_header_insertion) 3239 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3240 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3241 adapter->vlan_header_insertion); 3242 break; 3243 case RX_VLAN_HEADER_INSERTION: 3244 adapter->rx_vlan_header_insertion = 3245 be64_to_cpu(crq->query_capability.number); 3246 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3247 adapter->rx_vlan_header_insertion); 3248 break; 3249 case MAX_TX_SG_ENTRIES: 3250 adapter->max_tx_sg_entries = 3251 be64_to_cpu(crq->query_capability.number); 3252 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3253 adapter->max_tx_sg_entries); 3254 break; 3255 case RX_SG_SUPPORTED: 3256 adapter->rx_sg_supported = 3257 be64_to_cpu(crq->query_capability.number); 3258 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3259 adapter->rx_sg_supported); 3260 break; 3261 case OPT_TX_COMP_SUB_QUEUES: 3262 adapter->opt_tx_comp_sub_queues = 3263 be64_to_cpu(crq->query_capability.number); 3264 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3265 adapter->opt_tx_comp_sub_queues); 3266 break; 3267 case OPT_RX_COMP_QUEUES: 3268 adapter->opt_rx_comp_queues = 3269 be64_to_cpu(crq->query_capability.number); 3270 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3271 adapter->opt_rx_comp_queues); 3272 break; 3273 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3274 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3275 be64_to_cpu(crq->query_capability.number); 3276 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3277 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3278 break; 3279 case OPT_TX_ENTRIES_PER_SUBCRQ: 3280 adapter->opt_tx_entries_per_subcrq = 3281 be64_to_cpu(crq->query_capability.number); 3282 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3283 adapter->opt_tx_entries_per_subcrq); 3284 break; 3285 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3286 adapter->opt_rxba_entries_per_subcrq = 3287 be64_to_cpu(crq->query_capability.number); 3288 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3289 adapter->opt_rxba_entries_per_subcrq); 3290 break; 3291 case TX_RX_DESC_REQ: 3292 adapter->tx_rx_desc_req = crq->query_capability.number; 3293 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3294 adapter->tx_rx_desc_req); 3295 break; 3296 3297 default: 3298 netdev_err(netdev, "Got invalid cap rsp %d\n", 3299 crq->query_capability.capability); 3300 } 3301 3302 out: 3303 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3304 adapter->wait_capability = false; 3305 ibmvnic_send_req_caps(adapter, 0); 3306 } 3307 } 3308 3309 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3310 struct ibmvnic_adapter *adapter) 3311 { 3312 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3313 struct net_device *netdev = adapter->netdev; 3314 struct device *dev = &adapter->vdev->dev; 3315 u64 *u64_crq = (u64 *)crq; 3316 long rc; 3317 3318 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3319 (unsigned long int)cpu_to_be64(u64_crq[0]), 3320 (unsigned long int)cpu_to_be64(u64_crq[1])); 3321 switch (gen_crq->first) { 3322 case IBMVNIC_CRQ_INIT_RSP: 3323 switch (gen_crq->cmd) { 3324 case IBMVNIC_CRQ_INIT: 3325 dev_info(dev, "Partner initialized\n"); 3326 adapter->from_passive_init = true; 3327 complete(&adapter->init_done); 3328 break; 3329 case IBMVNIC_CRQ_INIT_COMPLETE: 3330 dev_info(dev, "Partner initialization complete\n"); 3331 send_version_xchg(adapter); 3332 break; 3333 default: 3334 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3335 } 3336 return; 3337 case IBMVNIC_CRQ_XPORT_EVENT: 3338 netif_carrier_off(netdev); 3339 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3340 dev_info(dev, "Migrated, re-enabling adapter\n"); 3341 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 3342 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3343 dev_info(dev, "Backing device failover detected\n"); 3344 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 3345 } else { 3346 /* The adapter lost the connection */ 3347 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3348 gen_crq->cmd); 3349 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3350 } 3351 return; 3352 case IBMVNIC_CRQ_CMD_RSP: 3353 break; 3354 default: 3355 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3356 gen_crq->first); 3357 return; 3358 } 3359 3360 switch (gen_crq->cmd) { 3361 case VERSION_EXCHANGE_RSP: 3362 rc = crq->version_exchange_rsp.rc.code; 3363 if (rc) { 3364 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3365 break; 3366 } 3367 dev_info(dev, "Partner protocol version is %d\n", 3368 crq->version_exchange_rsp.version); 3369 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3370 ibmvnic_version) 3371 ibmvnic_version = 3372 be16_to_cpu(crq->version_exchange_rsp.version); 3373 send_cap_queries(adapter); 3374 break; 3375 case QUERY_CAPABILITY_RSP: 3376 handle_query_cap_rsp(crq, adapter); 3377 break; 3378 case QUERY_MAP_RSP: 3379 handle_query_map_rsp(crq, adapter); 3380 break; 3381 case REQUEST_MAP_RSP: 3382 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 3383 complete(&adapter->fw_done); 3384 break; 3385 case REQUEST_UNMAP_RSP: 3386 handle_request_unmap_rsp(crq, adapter); 3387 break; 3388 case REQUEST_CAPABILITY_RSP: 3389 handle_request_cap_rsp(crq, adapter); 3390 break; 3391 case LOGIN_RSP: 3392 netdev_dbg(netdev, "Got Login Response\n"); 3393 handle_login_rsp(crq, adapter); 3394 break; 3395 case LOGICAL_LINK_STATE_RSP: 3396 netdev_dbg(netdev, 3397 "Got Logical Link State Response, state: %d rc: %d\n", 3398 crq->logical_link_state_rsp.link_state, 3399 crq->logical_link_state_rsp.rc.code); 3400 adapter->logical_link_state = 3401 crq->logical_link_state_rsp.link_state; 3402 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3403 complete(&adapter->init_done); 3404 break; 3405 case LINK_STATE_INDICATION: 3406 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3407 adapter->phys_link_state = 3408 crq->link_state_indication.phys_link_state; 3409 adapter->logical_link_state = 3410 crq->link_state_indication.logical_link_state; 3411 break; 3412 case CHANGE_MAC_ADDR_RSP: 3413 netdev_dbg(netdev, "Got MAC address change Response\n"); 3414 handle_change_mac_rsp(crq, adapter); 3415 break; 3416 case ERROR_INDICATION: 3417 netdev_dbg(netdev, "Got Error Indication\n"); 3418 handle_error_indication(crq, adapter); 3419 break; 3420 case REQUEST_ERROR_RSP: 3421 netdev_dbg(netdev, "Got Error Detail Response\n"); 3422 handle_error_info_rsp(crq, adapter); 3423 break; 3424 case REQUEST_STATISTICS_RSP: 3425 netdev_dbg(netdev, "Got Statistics Response\n"); 3426 complete(&adapter->stats_done); 3427 break; 3428 case QUERY_IP_OFFLOAD_RSP: 3429 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3430 handle_query_ip_offload_rsp(adapter); 3431 break; 3432 case MULTICAST_CTRL_RSP: 3433 netdev_dbg(netdev, "Got multicast control Response\n"); 3434 break; 3435 case CONTROL_IP_OFFLOAD_RSP: 3436 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3437 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3438 sizeof(adapter->ip_offload_ctrl), 3439 DMA_TO_DEVICE); 3440 complete(&adapter->init_done); 3441 break; 3442 case COLLECT_FW_TRACE_RSP: 3443 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3444 complete(&adapter->fw_done); 3445 break; 3446 default: 3447 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3448 gen_crq->cmd); 3449 } 3450 } 3451 3452 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3453 { 3454 struct ibmvnic_adapter *adapter = instance; 3455 3456 tasklet_schedule(&adapter->tasklet); 3457 return IRQ_HANDLED; 3458 } 3459 3460 static void ibmvnic_tasklet(void *data) 3461 { 3462 struct ibmvnic_adapter *adapter = data; 3463 struct ibmvnic_crq_queue *queue = &adapter->crq; 3464 union ibmvnic_crq *crq; 3465 unsigned long flags; 3466 bool done = false; 3467 3468 spin_lock_irqsave(&queue->lock, flags); 3469 while (!done) { 3470 /* Pull all the valid messages off the CRQ */ 3471 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3472 ibmvnic_handle_crq(crq, adapter); 3473 crq->generic.first = 0; 3474 } 3475 3476 /* remain in tasklet until all 3477 * capabilities responses are received 3478 */ 3479 if (!adapter->wait_capability) 3480 done = true; 3481 } 3482 /* if capabilities CRQ's were sent in this tasklet, the following 3483 * tasklet must wait until all responses are received 3484 */ 3485 if (atomic_read(&adapter->running_cap_crqs) != 0) 3486 adapter->wait_capability = true; 3487 spin_unlock_irqrestore(&queue->lock, flags); 3488 } 3489 3490 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3491 { 3492 struct vio_dev *vdev = adapter->vdev; 3493 int rc; 3494 3495 do { 3496 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3497 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3498 3499 if (rc) 3500 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3501 3502 return rc; 3503 } 3504 3505 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3506 { 3507 struct ibmvnic_crq_queue *crq = &adapter->crq; 3508 struct device *dev = &adapter->vdev->dev; 3509 struct vio_dev *vdev = adapter->vdev; 3510 int rc; 3511 3512 /* Close the CRQ */ 3513 do { 3514 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3515 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3516 3517 /* Clean out the queue */ 3518 memset(crq->msgs, 0, PAGE_SIZE); 3519 crq->cur = 0; 3520 3521 /* And re-open it again */ 3522 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3523 crq->msg_token, PAGE_SIZE); 3524 3525 if (rc == H_CLOSED) 3526 /* Adapter is good, but other end is not ready */ 3527 dev_warn(dev, "Partner adapter not ready\n"); 3528 else if (rc != 0) 3529 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3530 3531 return rc; 3532 } 3533 3534 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3535 { 3536 struct ibmvnic_crq_queue *crq = &adapter->crq; 3537 struct vio_dev *vdev = adapter->vdev; 3538 long rc; 3539 3540 if (!crq->msgs) 3541 return; 3542 3543 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3544 free_irq(vdev->irq, adapter); 3545 tasklet_kill(&adapter->tasklet); 3546 do { 3547 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3548 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3549 3550 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3551 DMA_BIDIRECTIONAL); 3552 free_page((unsigned long)crq->msgs); 3553 crq->msgs = NULL; 3554 } 3555 3556 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3557 { 3558 struct ibmvnic_crq_queue *crq = &adapter->crq; 3559 struct device *dev = &adapter->vdev->dev; 3560 struct vio_dev *vdev = adapter->vdev; 3561 int rc, retrc = -ENOMEM; 3562 3563 if (crq->msgs) 3564 return 0; 3565 3566 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3567 /* Should we allocate more than one page? */ 3568 3569 if (!crq->msgs) 3570 return -ENOMEM; 3571 3572 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3573 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3574 DMA_BIDIRECTIONAL); 3575 if (dma_mapping_error(dev, crq->msg_token)) 3576 goto map_failed; 3577 3578 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3579 crq->msg_token, PAGE_SIZE); 3580 3581 if (rc == H_RESOURCE) 3582 /* maybe kexecing and resource is busy. try a reset */ 3583 rc = ibmvnic_reset_crq(adapter); 3584 retrc = rc; 3585 3586 if (rc == H_CLOSED) { 3587 dev_warn(dev, "Partner adapter not ready\n"); 3588 } else if (rc) { 3589 dev_warn(dev, "Error %d opening adapter\n", rc); 3590 goto reg_crq_failed; 3591 } 3592 3593 retrc = 0; 3594 3595 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3596 (unsigned long)adapter); 3597 3598 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3599 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3600 adapter); 3601 if (rc) { 3602 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3603 vdev->irq, rc); 3604 goto req_irq_failed; 3605 } 3606 3607 rc = vio_enable_interrupts(vdev); 3608 if (rc) { 3609 dev_err(dev, "Error %d enabling interrupts\n", rc); 3610 goto req_irq_failed; 3611 } 3612 3613 crq->cur = 0; 3614 spin_lock_init(&crq->lock); 3615 3616 return retrc; 3617 3618 req_irq_failed: 3619 tasklet_kill(&adapter->tasklet); 3620 do { 3621 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3622 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3623 reg_crq_failed: 3624 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3625 map_failed: 3626 free_page((unsigned long)crq->msgs); 3627 crq->msgs = NULL; 3628 return retrc; 3629 } 3630 3631 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3632 { 3633 struct device *dev = &adapter->vdev->dev; 3634 unsigned long timeout = msecs_to_jiffies(30000); 3635 int rc; 3636 3637 if (adapter->resetting) { 3638 rc = ibmvnic_reset_crq(adapter); 3639 if (!rc) 3640 rc = vio_enable_interrupts(adapter->vdev); 3641 } else { 3642 rc = init_crq_queue(adapter); 3643 } 3644 3645 if (rc) { 3646 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3647 return rc; 3648 } 3649 3650 adapter->from_passive_init = false; 3651 3652 init_completion(&adapter->init_done); 3653 adapter->init_done_rc = 0; 3654 ibmvnic_send_crq_init(adapter); 3655 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3656 dev_err(dev, "Initialization sequence timed out\n"); 3657 return -1; 3658 } 3659 3660 if (adapter->init_done_rc) { 3661 release_crq_queue(adapter); 3662 return adapter->init_done_rc; 3663 } 3664 3665 if (adapter->from_passive_init) { 3666 adapter->state = VNIC_OPEN; 3667 adapter->from_passive_init = false; 3668 return -1; 3669 } 3670 3671 if (adapter->resetting) 3672 rc = reset_sub_crq_queues(adapter); 3673 else 3674 rc = init_sub_crqs(adapter); 3675 if (rc) { 3676 dev_err(dev, "Initialization of sub crqs failed\n"); 3677 release_crq_queue(adapter); 3678 return rc; 3679 } 3680 3681 rc = init_sub_crq_irqs(adapter); 3682 if (rc) { 3683 dev_err(dev, "Failed to initialize sub crq irqs\n"); 3684 release_crq_queue(adapter); 3685 } 3686 3687 return rc; 3688 } 3689 3690 static struct device_attribute dev_attr_failover; 3691 3692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3693 { 3694 struct ibmvnic_adapter *adapter; 3695 struct net_device *netdev; 3696 unsigned char *mac_addr_p; 3697 int rc; 3698 3699 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3700 dev->unit_address); 3701 3702 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3703 VETH_MAC_ADDR, NULL); 3704 if (!mac_addr_p) { 3705 dev_err(&dev->dev, 3706 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3707 __FILE__, __LINE__); 3708 return 0; 3709 } 3710 3711 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3712 IBMVNIC_MAX_TX_QUEUES); 3713 if (!netdev) 3714 return -ENOMEM; 3715 3716 adapter = netdev_priv(netdev); 3717 adapter->state = VNIC_PROBING; 3718 dev_set_drvdata(&dev->dev, netdev); 3719 adapter->vdev = dev; 3720 adapter->netdev = netdev; 3721 3722 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3723 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3724 netdev->irq = dev->irq; 3725 netdev->netdev_ops = &ibmvnic_netdev_ops; 3726 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3727 SET_NETDEV_DEV(netdev, &dev->dev); 3728 3729 spin_lock_init(&adapter->stats_lock); 3730 3731 INIT_LIST_HEAD(&adapter->errors); 3732 spin_lock_init(&adapter->error_list_lock); 3733 3734 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 3735 INIT_LIST_HEAD(&adapter->rwi_list); 3736 mutex_init(&adapter->reset_lock); 3737 mutex_init(&adapter->rwi_lock); 3738 adapter->resetting = false; 3739 3740 do { 3741 rc = ibmvnic_init(adapter); 3742 if (rc && rc != EAGAIN) { 3743 free_netdev(netdev); 3744 return rc; 3745 } 3746 } while (rc == EAGAIN); 3747 3748 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3749 3750 rc = device_create_file(&dev->dev, &dev_attr_failover); 3751 if (rc) { 3752 free_netdev(netdev); 3753 return rc; 3754 } 3755 3756 rc = register_netdev(netdev); 3757 if (rc) { 3758 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3759 device_remove_file(&dev->dev, &dev_attr_failover); 3760 free_netdev(netdev); 3761 return rc; 3762 } 3763 dev_info(&dev->dev, "ibmvnic registered\n"); 3764 3765 adapter->state = VNIC_PROBED; 3766 return 0; 3767 } 3768 3769 static int ibmvnic_remove(struct vio_dev *dev) 3770 { 3771 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3772 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3773 3774 adapter->state = VNIC_REMOVING; 3775 unregister_netdev(netdev); 3776 mutex_lock(&adapter->reset_lock); 3777 3778 release_resources(adapter); 3779 release_sub_crqs(adapter); 3780 release_crq_queue(adapter); 3781 3782 adapter->state = VNIC_REMOVED; 3783 3784 mutex_unlock(&adapter->reset_lock); 3785 device_remove_file(&dev->dev, &dev_attr_failover); 3786 free_netdev(netdev); 3787 dev_set_drvdata(&dev->dev, NULL); 3788 3789 return 0; 3790 } 3791 3792 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 3793 const char *buf, size_t count) 3794 { 3795 struct net_device *netdev = dev_get_drvdata(dev); 3796 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3797 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 3798 __be64 session_token; 3799 long rc; 3800 3801 if (!sysfs_streq(buf, "1")) 3802 return -EINVAL; 3803 3804 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 3805 H_GET_SESSION_TOKEN, 0, 0, 0); 3806 if (rc) { 3807 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 3808 rc); 3809 return -EINVAL; 3810 } 3811 3812 session_token = (__be64)retbuf[0]; 3813 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 3814 be64_to_cpu(session_token)); 3815 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3816 H_SESSION_ERR_DETECTED, session_token, 0, 0); 3817 if (rc) { 3818 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 3819 rc); 3820 return -EINVAL; 3821 } 3822 3823 return count; 3824 } 3825 3826 static DEVICE_ATTR(failover, 0200, NULL, failover_store); 3827 3828 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3829 { 3830 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3831 struct ibmvnic_adapter *adapter; 3832 struct iommu_table *tbl; 3833 unsigned long ret = 0; 3834 int i; 3835 3836 tbl = get_iommu_table_base(&vdev->dev); 3837 3838 /* netdev inits at probe time along with the structures we need below*/ 3839 if (!netdev) 3840 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3841 3842 adapter = netdev_priv(netdev); 3843 3844 ret += PAGE_SIZE; /* the crq message queue */ 3845 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3846 3847 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3848 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3849 3850 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3851 i++) 3852 ret += adapter->rx_pool[i].size * 3853 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3854 3855 return ret; 3856 } 3857 3858 static int ibmvnic_resume(struct device *dev) 3859 { 3860 struct net_device *netdev = dev_get_drvdata(dev); 3861 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3862 int i; 3863 3864 if (adapter->state != VNIC_OPEN) 3865 return 0; 3866 3867 /* kick the interrupt handlers just in case we lost an interrupt */ 3868 for (i = 0; i < adapter->req_rx_queues; i++) 3869 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3870 adapter->rx_scrq[i]); 3871 3872 return 0; 3873 } 3874 3875 static struct vio_device_id ibmvnic_device_table[] = { 3876 {"network", "IBM,vnic"}, 3877 {"", "" } 3878 }; 3879 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3880 3881 static const struct dev_pm_ops ibmvnic_pm_ops = { 3882 .resume = ibmvnic_resume 3883 }; 3884 3885 static struct vio_driver ibmvnic_driver = { 3886 .id_table = ibmvnic_device_table, 3887 .probe = ibmvnic_probe, 3888 .remove = ibmvnic_remove, 3889 .get_desired_dma = ibmvnic_get_desired_dma, 3890 .name = ibmvnic_driver_name, 3891 .pm = &ibmvnic_pm_ops, 3892 }; 3893 3894 /* module functions */ 3895 static int __init ibmvnic_module_init(void) 3896 { 3897 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3898 IBMVNIC_DRIVER_VERSION); 3899 3900 return vio_register_driver(&ibmvnic_driver); 3901 } 3902 3903 static void __exit ibmvnic_module_exit(void) 3904 { 3905 vio_unregister_driver(&ibmvnic_driver); 3906 } 3907 3908 module_init(ibmvnic_module_init); 3909 module_exit(ibmvnic_module_exit); 3910