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/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static void send_request_unmap(struct ibmvnic_adapter *, u8); 114 static void send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static void release_crq_queue(struct ibmvnic_adapter *); 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 157 unsigned long length, unsigned long *number, 158 unsigned long *irq) 159 { 160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 161 long rc; 162 163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 164 *number = retbuf[0]; 165 *irq = retbuf[1]; 166 167 return rc; 168 } 169 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 171 struct ibmvnic_long_term_buff *ltb, int size) 172 { 173 struct device *dev = &adapter->vdev->dev; 174 175 ltb->size = size; 176 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 177 GFP_KERNEL); 178 179 if (!ltb->buff) { 180 dev_err(dev, "Couldn't alloc long term buffer\n"); 181 return -ENOMEM; 182 } 183 ltb->map_id = adapter->map_id; 184 adapter->map_id++; 185 186 init_completion(&adapter->fw_done); 187 send_request_map(adapter, ltb->addr, 188 ltb->size, ltb->map_id); 189 wait_for_completion(&adapter->fw_done); 190 191 if (adapter->fw_done_rc) { 192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 193 adapter->fw_done_rc); 194 return -1; 195 } 196 return 0; 197 } 198 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 200 struct ibmvnic_long_term_buff *ltb) 201 { 202 struct device *dev = &adapter->vdev->dev; 203 204 if (!ltb->buff) 205 return; 206 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 208 adapter->reset_reason != VNIC_RESET_MOBILITY) 209 send_request_unmap(adapter, ltb->map_id); 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 211 } 212 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 214 struct ibmvnic_long_term_buff *ltb) 215 { 216 memset(ltb->buff, 0, ltb->size); 217 218 init_completion(&adapter->fw_done); 219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 220 wait_for_completion(&adapter->fw_done); 221 222 if (adapter->fw_done_rc) { 223 dev_info(&adapter->vdev->dev, 224 "Reset failed, attempting to free and reallocate buffer\n"); 225 free_long_term_buff(adapter, ltb); 226 return alloc_long_term_buff(adapter, ltb, ltb->size); 227 } 228 return 0; 229 } 230 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 232 { 233 int i; 234 235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 236 i++) 237 adapter->rx_pool[i].active = 0; 238 } 239 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 241 struct ibmvnic_rx_pool *pool) 242 { 243 int count = pool->size - atomic_read(&pool->available); 244 struct device *dev = &adapter->vdev->dev; 245 int buffers_added = 0; 246 unsigned long lpar_rc; 247 union sub_crq sub_crq; 248 struct sk_buff *skb; 249 unsigned int offset; 250 dma_addr_t dma_addr; 251 unsigned char *dst; 252 u64 *handle_array; 253 int shift = 0; 254 int index; 255 int i; 256 257 if (!pool->active) 258 return; 259 260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 261 be32_to_cpu(adapter->login_rsp_buf-> 262 off_rxadd_subcrqs)); 263 264 for (i = 0; i < count; ++i) { 265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 266 if (!skb) { 267 dev_err(dev, "Couldn't replenish rx buff\n"); 268 adapter->replenish_no_mem++; 269 break; 270 } 271 272 index = pool->free_map[pool->next_free]; 273 274 if (pool->rx_buff[index].skb) 275 dev_err(dev, "Inconsistent free_map!\n"); 276 277 /* Copy the skb to the long term mapped DMA buffer */ 278 offset = index * pool->buff_size; 279 dst = pool->long_term_buff.buff + offset; 280 memset(dst, 0, pool->buff_size); 281 dma_addr = pool->long_term_buff.addr + offset; 282 pool->rx_buff[index].data = dst; 283 284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 285 pool->rx_buff[index].dma = dma_addr; 286 pool->rx_buff[index].skb = skb; 287 pool->rx_buff[index].pool_index = pool->index; 288 pool->rx_buff[index].size = pool->buff_size; 289 290 memset(&sub_crq, 0, sizeof(sub_crq)); 291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 292 sub_crq.rx_add.correlator = 293 cpu_to_be64((u64)&pool->rx_buff[index]); 294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 296 297 /* The length field of the sCRQ is defined to be 24 bits so the 298 * buffer size needs to be left shifted by a byte before it is 299 * converted to big endian to prevent the last byte from being 300 * truncated. 301 */ 302 #ifdef __LITTLE_ENDIAN__ 303 shift = 8; 304 #endif 305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 306 307 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 308 &sub_crq); 309 if (lpar_rc != H_SUCCESS) 310 goto failure; 311 312 buffers_added++; 313 adapter->replenish_add_buff_success++; 314 pool->next_free = (pool->next_free + 1) % pool->size; 315 } 316 atomic_add(buffers_added, &pool->available); 317 return; 318 319 failure: 320 dev_info(dev, "replenish pools failure\n"); 321 pool->free_map[pool->next_free] = index; 322 pool->rx_buff[index].skb = NULL; 323 if (!dma_mapping_error(dev, dma_addr)) 324 dma_unmap_single(dev, dma_addr, pool->buff_size, 325 DMA_FROM_DEVICE); 326 327 dev_kfree_skb_any(skb); 328 adapter->replenish_add_buff_failure++; 329 atomic_add(buffers_added, &pool->available); 330 331 if (lpar_rc == H_CLOSED) { 332 /* Disable buffer pool replenishment and report carrier off if 333 * queue is closed. Firmware guarantees that a signal will 334 * be sent to the driver, triggering a reset. 335 */ 336 deactivate_rx_pools(adapter); 337 netif_carrier_off(adapter->netdev); 338 } 339 } 340 341 static void replenish_pools(struct ibmvnic_adapter *adapter) 342 { 343 int i; 344 345 adapter->replenish_task_cycles++; 346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 347 i++) { 348 if (adapter->rx_pool[i].active) 349 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 350 } 351 } 352 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 354 { 355 kfree(adapter->tx_stats_buffers); 356 kfree(adapter->rx_stats_buffers); 357 adapter->tx_stats_buffers = NULL; 358 adapter->rx_stats_buffers = NULL; 359 } 360 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 362 { 363 adapter->tx_stats_buffers = 364 kcalloc(adapter->req_tx_queues, 365 sizeof(struct ibmvnic_tx_queue_stats), 366 GFP_KERNEL); 367 if (!adapter->tx_stats_buffers) 368 return -ENOMEM; 369 370 adapter->rx_stats_buffers = 371 kcalloc(adapter->req_rx_queues, 372 sizeof(struct ibmvnic_rx_queue_stats), 373 GFP_KERNEL); 374 if (!adapter->rx_stats_buffers) 375 return -ENOMEM; 376 377 return 0; 378 } 379 380 static void release_stats_token(struct ibmvnic_adapter *adapter) 381 { 382 struct device *dev = &adapter->vdev->dev; 383 384 if (!adapter->stats_token) 385 return; 386 387 dma_unmap_single(dev, adapter->stats_token, 388 sizeof(struct ibmvnic_statistics), 389 DMA_FROM_DEVICE); 390 adapter->stats_token = 0; 391 } 392 393 static int init_stats_token(struct ibmvnic_adapter *adapter) 394 { 395 struct device *dev = &adapter->vdev->dev; 396 dma_addr_t stok; 397 398 stok = dma_map_single(dev, &adapter->stats, 399 sizeof(struct ibmvnic_statistics), 400 DMA_FROM_DEVICE); 401 if (dma_mapping_error(dev, stok)) { 402 dev_err(dev, "Couldn't map stats buffer\n"); 403 return -1; 404 } 405 406 adapter->stats_token = stok; 407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 408 return 0; 409 } 410 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 412 { 413 struct ibmvnic_rx_pool *rx_pool; 414 int rx_scrqs; 415 int i, j, rc; 416 u64 *size_array; 417 418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 420 421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 422 for (i = 0; i < rx_scrqs; i++) { 423 rx_pool = &adapter->rx_pool[i]; 424 425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 426 427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 428 free_long_term_buff(adapter, &rx_pool->long_term_buff); 429 rx_pool->buff_size = be64_to_cpu(size_array[i]); 430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 431 rx_pool->size * 432 rx_pool->buff_size); 433 } else { 434 rc = reset_long_term_buff(adapter, 435 &rx_pool->long_term_buff); 436 } 437 438 if (rc) 439 return rc; 440 441 for (j = 0; j < rx_pool->size; j++) 442 rx_pool->free_map[j] = j; 443 444 memset(rx_pool->rx_buff, 0, 445 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 446 447 atomic_set(&rx_pool->available, 0); 448 rx_pool->next_alloc = 0; 449 rx_pool->next_free = 0; 450 rx_pool->active = 1; 451 } 452 453 return 0; 454 } 455 456 static void release_rx_pools(struct ibmvnic_adapter *adapter) 457 { 458 struct ibmvnic_rx_pool *rx_pool; 459 int i, j; 460 461 if (!adapter->rx_pool) 462 return; 463 464 for (i = 0; i < adapter->num_active_rx_pools; i++) { 465 rx_pool = &adapter->rx_pool[i]; 466 467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 468 469 kfree(rx_pool->free_map); 470 free_long_term_buff(adapter, &rx_pool->long_term_buff); 471 472 if (!rx_pool->rx_buff) 473 continue; 474 475 for (j = 0; j < rx_pool->size; j++) { 476 if (rx_pool->rx_buff[j].skb) { 477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 478 rx_pool->rx_buff[i].skb = NULL; 479 } 480 } 481 482 kfree(rx_pool->rx_buff); 483 } 484 485 kfree(adapter->rx_pool); 486 adapter->rx_pool = NULL; 487 adapter->num_active_rx_pools = 0; 488 } 489 490 static int init_rx_pools(struct net_device *netdev) 491 { 492 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 493 struct device *dev = &adapter->vdev->dev; 494 struct ibmvnic_rx_pool *rx_pool; 495 int rxadd_subcrqs; 496 u64 *size_array; 497 int i, j; 498 499 rxadd_subcrqs = 500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 503 504 adapter->rx_pool = kcalloc(rxadd_subcrqs, 505 sizeof(struct ibmvnic_rx_pool), 506 GFP_KERNEL); 507 if (!adapter->rx_pool) { 508 dev_err(dev, "Failed to allocate rx pools\n"); 509 return -1; 510 } 511 512 adapter->num_active_rx_pools = 0; 513 514 for (i = 0; i < rxadd_subcrqs; i++) { 515 rx_pool = &adapter->rx_pool[i]; 516 517 netdev_dbg(adapter->netdev, 518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 519 i, adapter->req_rx_add_entries_per_subcrq, 520 be64_to_cpu(size_array[i])); 521 522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 523 rx_pool->index = i; 524 rx_pool->buff_size = be64_to_cpu(size_array[i]); 525 rx_pool->active = 1; 526 527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 528 GFP_KERNEL); 529 if (!rx_pool->free_map) { 530 release_rx_pools(adapter); 531 return -1; 532 } 533 534 rx_pool->rx_buff = kcalloc(rx_pool->size, 535 sizeof(struct ibmvnic_rx_buff), 536 GFP_KERNEL); 537 if (!rx_pool->rx_buff) { 538 dev_err(dev, "Couldn't alloc rx buffers\n"); 539 release_rx_pools(adapter); 540 return -1; 541 } 542 543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 544 rx_pool->size * rx_pool->buff_size)) { 545 release_rx_pools(adapter); 546 return -1; 547 } 548 549 for (j = 0; j < rx_pool->size; ++j) 550 rx_pool->free_map[j] = j; 551 552 atomic_set(&rx_pool->available, 0); 553 rx_pool->next_alloc = 0; 554 rx_pool->next_free = 0; 555 } 556 557 adapter->num_active_rx_pools = rxadd_subcrqs; 558 559 return 0; 560 } 561 562 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 563 { 564 struct ibmvnic_tx_pool *tx_pool; 565 int tx_scrqs; 566 int i, j, rc; 567 568 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 569 for (i = 0; i < tx_scrqs; i++) { 570 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i); 571 572 tx_pool = &adapter->tx_pool[i]; 573 574 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 575 if (rc) 576 return rc; 577 578 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb); 579 if (rc) 580 return rc; 581 582 memset(tx_pool->tx_buff, 0, 583 adapter->req_tx_entries_per_subcrq * 584 sizeof(struct ibmvnic_tx_buff)); 585 586 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 587 tx_pool->free_map[j] = j; 588 589 tx_pool->consumer_index = 0; 590 tx_pool->producer_index = 0; 591 tx_pool->tso_index = 0; 592 } 593 594 return 0; 595 } 596 597 static void release_vpd_data(struct ibmvnic_adapter *adapter) 598 { 599 if (!adapter->vpd) 600 return; 601 602 kfree(adapter->vpd->buff); 603 kfree(adapter->vpd); 604 605 adapter->vpd = NULL; 606 } 607 608 static void release_tx_pools(struct ibmvnic_adapter *adapter) 609 { 610 struct ibmvnic_tx_pool *tx_pool; 611 int i; 612 613 if (!adapter->tx_pool) 614 return; 615 616 for (i = 0; i < adapter->num_active_tx_pools; i++) { 617 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i); 618 tx_pool = &adapter->tx_pool[i]; 619 kfree(tx_pool->tx_buff); 620 free_long_term_buff(adapter, &tx_pool->long_term_buff); 621 free_long_term_buff(adapter, &tx_pool->tso_ltb); 622 kfree(tx_pool->free_map); 623 } 624 625 kfree(adapter->tx_pool); 626 adapter->tx_pool = NULL; 627 adapter->num_active_tx_pools = 0; 628 } 629 630 static int init_tx_pools(struct net_device *netdev) 631 { 632 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 633 struct device *dev = &adapter->vdev->dev; 634 struct ibmvnic_tx_pool *tx_pool; 635 int tx_subcrqs; 636 int i, j; 637 638 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 639 adapter->tx_pool = kcalloc(tx_subcrqs, 640 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 641 if (!adapter->tx_pool) 642 return -1; 643 644 adapter->num_active_tx_pools = 0; 645 646 for (i = 0; i < tx_subcrqs; i++) { 647 tx_pool = &adapter->tx_pool[i]; 648 649 netdev_dbg(adapter->netdev, 650 "Initializing tx_pool[%d], %lld buffs\n", 651 i, adapter->req_tx_entries_per_subcrq); 652 653 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 654 sizeof(struct ibmvnic_tx_buff), 655 GFP_KERNEL); 656 if (!tx_pool->tx_buff) { 657 dev_err(dev, "tx pool buffer allocation failed\n"); 658 release_tx_pools(adapter); 659 return -1; 660 } 661 662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 663 adapter->req_tx_entries_per_subcrq * 664 adapter->req_mtu)) { 665 release_tx_pools(adapter); 666 return -1; 667 } 668 669 /* alloc TSO ltb */ 670 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb, 671 IBMVNIC_TSO_BUFS * 672 IBMVNIC_TSO_BUF_SZ)) { 673 release_tx_pools(adapter); 674 return -1; 675 } 676 677 tx_pool->tso_index = 0; 678 679 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 680 sizeof(int), GFP_KERNEL); 681 if (!tx_pool->free_map) { 682 release_tx_pools(adapter); 683 return -1; 684 } 685 686 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 687 tx_pool->free_map[j] = j; 688 689 tx_pool->consumer_index = 0; 690 tx_pool->producer_index = 0; 691 } 692 693 adapter->num_active_tx_pools = tx_subcrqs; 694 695 return 0; 696 } 697 698 static void release_error_buffers(struct ibmvnic_adapter *adapter) 699 { 700 struct device *dev = &adapter->vdev->dev; 701 struct ibmvnic_error_buff *error_buff, *tmp; 702 unsigned long flags; 703 704 spin_lock_irqsave(&adapter->error_list_lock, flags); 705 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 706 list_del(&error_buff->list); 707 dma_unmap_single(dev, error_buff->dma, error_buff->len, 708 DMA_FROM_DEVICE); 709 kfree(error_buff->buff); 710 kfree(error_buff); 711 } 712 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 713 } 714 715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 716 { 717 int i; 718 719 if (adapter->napi_enabled) 720 return; 721 722 for (i = 0; i < adapter->req_rx_queues; i++) 723 napi_enable(&adapter->napi[i]); 724 725 adapter->napi_enabled = true; 726 } 727 728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 729 { 730 int i; 731 732 if (!adapter->napi_enabled) 733 return; 734 735 for (i = 0; i < adapter->req_rx_queues; i++) { 736 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 737 napi_disable(&adapter->napi[i]); 738 } 739 740 adapter->napi_enabled = false; 741 } 742 743 static int ibmvnic_login(struct net_device *netdev) 744 { 745 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 746 unsigned long timeout = msecs_to_jiffies(30000); 747 struct device *dev = &adapter->vdev->dev; 748 int rc; 749 750 do { 751 if (adapter->renegotiate) { 752 adapter->renegotiate = false; 753 release_sub_crqs(adapter); 754 755 reinit_completion(&adapter->init_done); 756 send_cap_queries(adapter); 757 if (!wait_for_completion_timeout(&adapter->init_done, 758 timeout)) { 759 dev_err(dev, "Capabilities query timeout\n"); 760 return -1; 761 } 762 rc = init_sub_crqs(adapter); 763 if (rc) { 764 dev_err(dev, 765 "Initialization of SCRQ's failed\n"); 766 return -1; 767 } 768 rc = init_sub_crq_irqs(adapter); 769 if (rc) { 770 dev_err(dev, 771 "Initialization of SCRQ's irqs failed\n"); 772 return -1; 773 } 774 } 775 776 reinit_completion(&adapter->init_done); 777 send_login(adapter); 778 if (!wait_for_completion_timeout(&adapter->init_done, 779 timeout)) { 780 dev_err(dev, "Login timeout\n"); 781 return -1; 782 } 783 } while (adapter->renegotiate); 784 785 /* handle pending MAC address changes after successful login */ 786 if (adapter->mac_change_pending) { 787 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 788 adapter->mac_change_pending = false; 789 } 790 791 return 0; 792 } 793 794 static void release_login_buffer(struct ibmvnic_adapter *adapter) 795 { 796 kfree(adapter->login_buf); 797 adapter->login_buf = NULL; 798 } 799 800 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 801 { 802 kfree(adapter->login_rsp_buf); 803 adapter->login_rsp_buf = NULL; 804 } 805 806 static void release_resources(struct ibmvnic_adapter *adapter) 807 { 808 int i; 809 810 release_vpd_data(adapter); 811 812 release_tx_pools(adapter); 813 release_rx_pools(adapter); 814 815 release_stats_token(adapter); 816 release_stats_buffers(adapter); 817 release_error_buffers(adapter); 818 819 if (adapter->napi) { 820 for (i = 0; i < adapter->req_rx_queues; i++) { 821 if (&adapter->napi[i]) { 822 netdev_dbg(adapter->netdev, 823 "Releasing napi[%d]\n", i); 824 netif_napi_del(&adapter->napi[i]); 825 } 826 } 827 } 828 kfree(adapter->napi); 829 adapter->napi = NULL; 830 831 release_login_rsp_buffer(adapter); 832 } 833 834 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 835 { 836 struct net_device *netdev = adapter->netdev; 837 unsigned long timeout = msecs_to_jiffies(30000); 838 union ibmvnic_crq crq; 839 bool resend; 840 int rc; 841 842 netdev_dbg(netdev, "setting link state %d\n", link_state); 843 844 memset(&crq, 0, sizeof(crq)); 845 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 846 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 847 crq.logical_link_state.link_state = link_state; 848 849 do { 850 resend = false; 851 852 reinit_completion(&adapter->init_done); 853 rc = ibmvnic_send_crq(adapter, &crq); 854 if (rc) { 855 netdev_err(netdev, "Failed to set link state\n"); 856 return rc; 857 } 858 859 if (!wait_for_completion_timeout(&adapter->init_done, 860 timeout)) { 861 netdev_err(netdev, "timeout setting link state\n"); 862 return -1; 863 } 864 865 if (adapter->init_done_rc == 1) { 866 /* Partuial success, delay and re-send */ 867 mdelay(1000); 868 resend = true; 869 } 870 } while (resend); 871 872 return 0; 873 } 874 875 static int set_real_num_queues(struct net_device *netdev) 876 { 877 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 878 int rc; 879 880 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 881 adapter->req_tx_queues, adapter->req_rx_queues); 882 883 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 884 if (rc) { 885 netdev_err(netdev, "failed to set the number of tx queues\n"); 886 return rc; 887 } 888 889 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 890 if (rc) 891 netdev_err(netdev, "failed to set the number of rx queues\n"); 892 893 return rc; 894 } 895 896 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 897 { 898 struct device *dev = &adapter->vdev->dev; 899 union ibmvnic_crq crq; 900 int len = 0; 901 902 if (adapter->vpd->buff) 903 len = adapter->vpd->len; 904 905 init_completion(&adapter->fw_done); 906 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 907 crq.get_vpd_size.cmd = GET_VPD_SIZE; 908 ibmvnic_send_crq(adapter, &crq); 909 wait_for_completion(&adapter->fw_done); 910 911 if (!adapter->vpd->len) 912 return -ENODATA; 913 914 if (!adapter->vpd->buff) 915 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 916 else if (adapter->vpd->len != len) 917 adapter->vpd->buff = 918 krealloc(adapter->vpd->buff, 919 adapter->vpd->len, GFP_KERNEL); 920 921 if (!adapter->vpd->buff) { 922 dev_err(dev, "Could allocate VPD buffer\n"); 923 return -ENOMEM; 924 } 925 926 adapter->vpd->dma_addr = 927 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 928 DMA_FROM_DEVICE); 929 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 930 dev_err(dev, "Could not map VPD buffer\n"); 931 kfree(adapter->vpd->buff); 932 adapter->vpd->buff = NULL; 933 return -ENOMEM; 934 } 935 936 reinit_completion(&adapter->fw_done); 937 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 938 crq.get_vpd.cmd = GET_VPD; 939 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 940 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 941 ibmvnic_send_crq(adapter, &crq); 942 wait_for_completion(&adapter->fw_done); 943 944 return 0; 945 } 946 947 static int init_resources(struct ibmvnic_adapter *adapter) 948 { 949 struct net_device *netdev = adapter->netdev; 950 int i, rc; 951 952 rc = set_real_num_queues(netdev); 953 if (rc) 954 return rc; 955 956 rc = init_stats_buffers(adapter); 957 if (rc) 958 return rc; 959 960 rc = init_stats_token(adapter); 961 if (rc) 962 return rc; 963 964 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 965 if (!adapter->vpd) 966 return -ENOMEM; 967 968 /* Vital Product Data (VPD) */ 969 rc = ibmvnic_get_vpd(adapter); 970 if (rc) { 971 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 972 return rc; 973 } 974 975 adapter->map_id = 1; 976 adapter->napi = kcalloc(adapter->req_rx_queues, 977 sizeof(struct napi_struct), GFP_KERNEL); 978 if (!adapter->napi) 979 return -ENOMEM; 980 981 for (i = 0; i < adapter->req_rx_queues; i++) { 982 netdev_dbg(netdev, "Adding napi[%d]\n", i); 983 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 984 NAPI_POLL_WEIGHT); 985 } 986 987 send_map_query(adapter); 988 989 rc = init_rx_pools(netdev); 990 if (rc) 991 return rc; 992 993 rc = init_tx_pools(netdev); 994 return rc; 995 } 996 997 static int __ibmvnic_open(struct net_device *netdev) 998 { 999 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1000 enum vnic_state prev_state = adapter->state; 1001 int i, rc; 1002 1003 adapter->state = VNIC_OPENING; 1004 replenish_pools(adapter); 1005 ibmvnic_napi_enable(adapter); 1006 1007 /* We're ready to receive frames, enable the sub-crq interrupts and 1008 * set the logical link state to up 1009 */ 1010 for (i = 0; i < adapter->req_rx_queues; i++) { 1011 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1012 if (prev_state == VNIC_CLOSED) 1013 enable_irq(adapter->rx_scrq[i]->irq); 1014 else 1015 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1016 } 1017 1018 for (i = 0; i < adapter->req_tx_queues; i++) { 1019 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1020 if (prev_state == VNIC_CLOSED) 1021 enable_irq(adapter->tx_scrq[i]->irq); 1022 else 1023 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1024 } 1025 1026 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1027 if (rc) { 1028 for (i = 0; i < adapter->req_rx_queues; i++) 1029 napi_disable(&adapter->napi[i]); 1030 release_resources(adapter); 1031 return rc; 1032 } 1033 1034 netif_tx_start_all_queues(netdev); 1035 1036 if (prev_state == VNIC_CLOSED) { 1037 for (i = 0; i < adapter->req_rx_queues; i++) 1038 napi_schedule(&adapter->napi[i]); 1039 } 1040 1041 adapter->state = VNIC_OPEN; 1042 return rc; 1043 } 1044 1045 static int ibmvnic_open(struct net_device *netdev) 1046 { 1047 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1048 int rc; 1049 1050 mutex_lock(&adapter->reset_lock); 1051 1052 if (adapter->state != VNIC_CLOSED) { 1053 rc = ibmvnic_login(netdev); 1054 if (rc) { 1055 mutex_unlock(&adapter->reset_lock); 1056 return rc; 1057 } 1058 1059 rc = init_resources(adapter); 1060 if (rc) { 1061 netdev_err(netdev, "failed to initialize resources\n"); 1062 release_resources(adapter); 1063 mutex_unlock(&adapter->reset_lock); 1064 return rc; 1065 } 1066 } 1067 1068 rc = __ibmvnic_open(netdev); 1069 netif_carrier_on(netdev); 1070 1071 mutex_unlock(&adapter->reset_lock); 1072 1073 return rc; 1074 } 1075 1076 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1077 { 1078 struct ibmvnic_rx_pool *rx_pool; 1079 u64 rx_entries; 1080 int rx_scrqs; 1081 int i, j; 1082 1083 if (!adapter->rx_pool) 1084 return; 1085 1086 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 1087 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1088 1089 /* Free any remaining skbs in the rx buffer pools */ 1090 for (i = 0; i < rx_scrqs; i++) { 1091 rx_pool = &adapter->rx_pool[i]; 1092 if (!rx_pool) 1093 continue; 1094 1095 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1096 for (j = 0; j < rx_entries; j++) { 1097 if (rx_pool->rx_buff[j].skb) { 1098 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 1099 rx_pool->rx_buff[j].skb = NULL; 1100 } 1101 } 1102 } 1103 } 1104 1105 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1106 { 1107 struct ibmvnic_tx_pool *tx_pool; 1108 u64 tx_entries; 1109 int tx_scrqs; 1110 int i, j; 1111 1112 if (!adapter->tx_pool) 1113 return; 1114 1115 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 1116 tx_entries = adapter->req_tx_entries_per_subcrq; 1117 1118 /* Free any remaining skbs in the tx buffer pools */ 1119 for (i = 0; i < tx_scrqs; i++) { 1120 tx_pool = &adapter->tx_pool[i]; 1121 if (!tx_pool) 1122 continue; 1123 1124 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1125 for (j = 0; j < tx_entries; j++) { 1126 if (tx_pool->tx_buff[j].skb) { 1127 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 1128 tx_pool->tx_buff[j].skb = NULL; 1129 } 1130 } 1131 } 1132 } 1133 1134 static int __ibmvnic_close(struct net_device *netdev) 1135 { 1136 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1137 int rc = 0; 1138 int i; 1139 1140 adapter->state = VNIC_CLOSING; 1141 1142 /* ensure that transmissions are stopped if called by do_reset */ 1143 if (adapter->resetting) 1144 netif_tx_disable(netdev); 1145 else 1146 netif_tx_stop_all_queues(netdev); 1147 1148 ibmvnic_napi_disable(adapter); 1149 1150 if (adapter->tx_scrq) { 1151 for (i = 0; i < adapter->req_tx_queues; i++) 1152 if (adapter->tx_scrq[i]->irq) { 1153 netdev_dbg(adapter->netdev, 1154 "Disabling tx_scrq[%d] irq\n", i); 1155 disable_irq(adapter->tx_scrq[i]->irq); 1156 } 1157 } 1158 1159 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1160 if (rc) 1161 return rc; 1162 1163 if (adapter->rx_scrq) { 1164 for (i = 0; i < adapter->req_rx_queues; i++) { 1165 int retries = 10; 1166 1167 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 1168 retries--; 1169 mdelay(100); 1170 1171 if (retries == 0) 1172 break; 1173 } 1174 1175 if (adapter->rx_scrq[i]->irq) { 1176 netdev_dbg(adapter->netdev, 1177 "Disabling rx_scrq[%d] irq\n", i); 1178 disable_irq(adapter->rx_scrq[i]->irq); 1179 } 1180 } 1181 } 1182 clean_rx_pools(adapter); 1183 clean_tx_pools(adapter); 1184 adapter->state = VNIC_CLOSED; 1185 return rc; 1186 } 1187 1188 static int ibmvnic_close(struct net_device *netdev) 1189 { 1190 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1191 int rc; 1192 1193 mutex_lock(&adapter->reset_lock); 1194 rc = __ibmvnic_close(netdev); 1195 mutex_unlock(&adapter->reset_lock); 1196 1197 return rc; 1198 } 1199 1200 /** 1201 * build_hdr_data - creates L2/L3/L4 header data buffer 1202 * @hdr_field - bitfield determining needed headers 1203 * @skb - socket buffer 1204 * @hdr_len - array of header lengths 1205 * @tot_len - total length of data 1206 * 1207 * Reads hdr_field to determine which headers are needed by firmware. 1208 * Builds a buffer containing these headers. Saves individual header 1209 * lengths and total buffer length to be used to build descriptors. 1210 */ 1211 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1212 int *hdr_len, u8 *hdr_data) 1213 { 1214 int len = 0; 1215 u8 *hdr; 1216 1217 hdr_len[0] = sizeof(struct ethhdr); 1218 1219 if (skb->protocol == htons(ETH_P_IP)) { 1220 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1221 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1222 hdr_len[2] = tcp_hdrlen(skb); 1223 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1224 hdr_len[2] = sizeof(struct udphdr); 1225 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1226 hdr_len[1] = sizeof(struct ipv6hdr); 1227 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1228 hdr_len[2] = tcp_hdrlen(skb); 1229 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1230 hdr_len[2] = sizeof(struct udphdr); 1231 } else if (skb->protocol == htons(ETH_P_ARP)) { 1232 hdr_len[1] = arp_hdr_len(skb->dev); 1233 hdr_len[2] = 0; 1234 } 1235 1236 memset(hdr_data, 0, 120); 1237 if ((hdr_field >> 6) & 1) { 1238 hdr = skb_mac_header(skb); 1239 memcpy(hdr_data, hdr, hdr_len[0]); 1240 len += hdr_len[0]; 1241 } 1242 1243 if ((hdr_field >> 5) & 1) { 1244 hdr = skb_network_header(skb); 1245 memcpy(hdr_data + len, hdr, hdr_len[1]); 1246 len += hdr_len[1]; 1247 } 1248 1249 if ((hdr_field >> 4) & 1) { 1250 hdr = skb_transport_header(skb); 1251 memcpy(hdr_data + len, hdr, hdr_len[2]); 1252 len += hdr_len[2]; 1253 } 1254 return len; 1255 } 1256 1257 /** 1258 * create_hdr_descs - create header and header extension descriptors 1259 * @hdr_field - bitfield determining needed headers 1260 * @data - buffer containing header data 1261 * @len - length of data buffer 1262 * @hdr_len - array of individual header lengths 1263 * @scrq_arr - descriptor array 1264 * 1265 * Creates header and, if needed, header extension descriptors and 1266 * places them in a descriptor array, scrq_arr 1267 */ 1268 1269 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1270 union sub_crq *scrq_arr) 1271 { 1272 union sub_crq hdr_desc; 1273 int tmp_len = len; 1274 int num_descs = 0; 1275 u8 *data, *cur; 1276 int tmp; 1277 1278 while (tmp_len > 0) { 1279 cur = hdr_data + len - tmp_len; 1280 1281 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1282 if (cur != hdr_data) { 1283 data = hdr_desc.hdr_ext.data; 1284 tmp = tmp_len > 29 ? 29 : tmp_len; 1285 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1286 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1287 hdr_desc.hdr_ext.len = tmp; 1288 } else { 1289 data = hdr_desc.hdr.data; 1290 tmp = tmp_len > 24 ? 24 : tmp_len; 1291 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1292 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1293 hdr_desc.hdr.len = tmp; 1294 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1295 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1296 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1297 hdr_desc.hdr.flag = hdr_field << 1; 1298 } 1299 memcpy(data, cur, tmp); 1300 tmp_len -= tmp; 1301 *scrq_arr = hdr_desc; 1302 scrq_arr++; 1303 num_descs++; 1304 } 1305 1306 return num_descs; 1307 } 1308 1309 /** 1310 * build_hdr_descs_arr - build a header descriptor array 1311 * @skb - socket buffer 1312 * @num_entries - number of descriptors to be sent 1313 * @subcrq - first TX descriptor 1314 * @hdr_field - bit field determining which headers will be sent 1315 * 1316 * This function will build a TX descriptor array with applicable 1317 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1318 */ 1319 1320 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1321 int *num_entries, u8 hdr_field) 1322 { 1323 int hdr_len[3] = {0, 0, 0}; 1324 int tot_len; 1325 u8 *hdr_data = txbuff->hdr_data; 1326 1327 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1328 txbuff->hdr_data); 1329 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1330 txbuff->indir_arr + 1); 1331 } 1332 1333 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1334 { 1335 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1336 int queue_num = skb_get_queue_mapping(skb); 1337 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1338 struct device *dev = &adapter->vdev->dev; 1339 struct ibmvnic_tx_buff *tx_buff = NULL; 1340 struct ibmvnic_sub_crq_queue *tx_scrq; 1341 struct ibmvnic_tx_pool *tx_pool; 1342 unsigned int tx_send_failed = 0; 1343 unsigned int tx_map_failed = 0; 1344 unsigned int tx_dropped = 0; 1345 unsigned int tx_packets = 0; 1346 unsigned int tx_bytes = 0; 1347 dma_addr_t data_dma_addr; 1348 struct netdev_queue *txq; 1349 unsigned long lpar_rc; 1350 union sub_crq tx_crq; 1351 unsigned int offset; 1352 int num_entries = 1; 1353 unsigned char *dst; 1354 u64 *handle_array; 1355 int index = 0; 1356 u8 proto = 0; 1357 int ret = 0; 1358 1359 if (adapter->resetting) { 1360 if (!netif_subqueue_stopped(netdev, skb)) 1361 netif_stop_subqueue(netdev, queue_num); 1362 dev_kfree_skb_any(skb); 1363 1364 tx_send_failed++; 1365 tx_dropped++; 1366 ret = NETDEV_TX_OK; 1367 goto out; 1368 } 1369 1370 tx_pool = &adapter->tx_pool[queue_num]; 1371 tx_scrq = adapter->tx_scrq[queue_num]; 1372 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1373 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1374 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1375 1376 index = tx_pool->free_map[tx_pool->consumer_index]; 1377 1378 if (skb_is_gso(skb)) { 1379 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ; 1380 dst = tx_pool->tso_ltb.buff + offset; 1381 memset(dst, 0, IBMVNIC_TSO_BUF_SZ); 1382 data_dma_addr = tx_pool->tso_ltb.addr + offset; 1383 tx_pool->tso_index++; 1384 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS) 1385 tx_pool->tso_index = 0; 1386 } else { 1387 offset = index * adapter->req_mtu; 1388 dst = tx_pool->long_term_buff.buff + offset; 1389 memset(dst, 0, adapter->req_mtu); 1390 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1391 } 1392 1393 if (skb_shinfo(skb)->nr_frags) { 1394 int cur, i; 1395 1396 /* Copy the head */ 1397 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1398 cur = skb_headlen(skb); 1399 1400 /* Copy the frags */ 1401 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1402 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1403 1404 memcpy(dst + cur, 1405 page_address(skb_frag_page(frag)) + 1406 frag->page_offset, skb_frag_size(frag)); 1407 cur += skb_frag_size(frag); 1408 } 1409 } else { 1410 skb_copy_from_linear_data(skb, dst, skb->len); 1411 } 1412 1413 tx_pool->consumer_index = 1414 (tx_pool->consumer_index + 1) % 1415 adapter->req_tx_entries_per_subcrq; 1416 1417 tx_buff = &tx_pool->tx_buff[index]; 1418 tx_buff->skb = skb; 1419 tx_buff->data_dma[0] = data_dma_addr; 1420 tx_buff->data_len[0] = skb->len; 1421 tx_buff->index = index; 1422 tx_buff->pool_index = queue_num; 1423 tx_buff->last_frag = true; 1424 1425 memset(&tx_crq, 0, sizeof(tx_crq)); 1426 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1427 tx_crq.v1.type = IBMVNIC_TX_DESC; 1428 tx_crq.v1.n_crq_elem = 1; 1429 tx_crq.v1.n_sge = 1; 1430 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1431 tx_crq.v1.correlator = cpu_to_be32(index); 1432 if (skb_is_gso(skb)) 1433 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id); 1434 else 1435 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1436 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1437 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1438 1439 if (adapter->vlan_header_insertion) { 1440 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1441 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1442 } 1443 1444 if (skb->protocol == htons(ETH_P_IP)) { 1445 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1446 proto = ip_hdr(skb)->protocol; 1447 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1448 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1449 proto = ipv6_hdr(skb)->nexthdr; 1450 } 1451 1452 if (proto == IPPROTO_TCP) 1453 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1454 else if (proto == IPPROTO_UDP) 1455 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1456 1457 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1458 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1459 hdrs += 2; 1460 } 1461 if (skb_is_gso(skb)) { 1462 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1463 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1464 hdrs += 2; 1465 } 1466 /* determine if l2/3/4 headers are sent to firmware */ 1467 if ((*hdrs >> 7) & 1) { 1468 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1469 tx_crq.v1.n_crq_elem = num_entries; 1470 tx_buff->indir_arr[0] = tx_crq; 1471 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1472 sizeof(tx_buff->indir_arr), 1473 DMA_TO_DEVICE); 1474 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1475 dev_kfree_skb_any(skb); 1476 tx_buff->skb = NULL; 1477 if (!firmware_has_feature(FW_FEATURE_CMO)) 1478 dev_err(dev, "tx: unable to map descriptor array\n"); 1479 tx_map_failed++; 1480 tx_dropped++; 1481 ret = NETDEV_TX_OK; 1482 goto out; 1483 } 1484 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1485 (u64)tx_buff->indir_dma, 1486 (u64)num_entries); 1487 } else { 1488 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1489 &tx_crq); 1490 } 1491 if (lpar_rc != H_SUCCESS) { 1492 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1493 1494 if (tx_pool->consumer_index == 0) 1495 tx_pool->consumer_index = 1496 adapter->req_tx_entries_per_subcrq - 1; 1497 else 1498 tx_pool->consumer_index--; 1499 1500 dev_kfree_skb_any(skb); 1501 tx_buff->skb = NULL; 1502 1503 if (lpar_rc == H_CLOSED) { 1504 /* Disable TX and report carrier off if queue is closed. 1505 * Firmware guarantees that a signal will be sent to the 1506 * driver, triggering a reset or some other action. 1507 */ 1508 netif_tx_stop_all_queues(netdev); 1509 netif_carrier_off(netdev); 1510 } 1511 1512 tx_send_failed++; 1513 tx_dropped++; 1514 ret = NETDEV_TX_OK; 1515 goto out; 1516 } 1517 1518 if (atomic_inc_return(&tx_scrq->used) 1519 >= adapter->req_tx_entries_per_subcrq) { 1520 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1521 netif_stop_subqueue(netdev, queue_num); 1522 } 1523 1524 tx_packets++; 1525 tx_bytes += skb->len; 1526 txq->trans_start = jiffies; 1527 ret = NETDEV_TX_OK; 1528 1529 out: 1530 netdev->stats.tx_dropped += tx_dropped; 1531 netdev->stats.tx_bytes += tx_bytes; 1532 netdev->stats.tx_packets += tx_packets; 1533 adapter->tx_send_failed += tx_send_failed; 1534 adapter->tx_map_failed += tx_map_failed; 1535 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1536 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1537 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1538 1539 return ret; 1540 } 1541 1542 static void ibmvnic_set_multi(struct net_device *netdev) 1543 { 1544 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1545 struct netdev_hw_addr *ha; 1546 union ibmvnic_crq crq; 1547 1548 memset(&crq, 0, sizeof(crq)); 1549 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1550 crq.request_capability.cmd = REQUEST_CAPABILITY; 1551 1552 if (netdev->flags & IFF_PROMISC) { 1553 if (!adapter->promisc_supported) 1554 return; 1555 } else { 1556 if (netdev->flags & IFF_ALLMULTI) { 1557 /* Accept all multicast */ 1558 memset(&crq, 0, sizeof(crq)); 1559 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1560 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1561 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1562 ibmvnic_send_crq(adapter, &crq); 1563 } else if (netdev_mc_empty(netdev)) { 1564 /* Reject all multicast */ 1565 memset(&crq, 0, sizeof(crq)); 1566 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1567 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1568 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1569 ibmvnic_send_crq(adapter, &crq); 1570 } else { 1571 /* Accept one or more multicast(s) */ 1572 netdev_for_each_mc_addr(ha, netdev) { 1573 memset(&crq, 0, sizeof(crq)); 1574 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1575 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1576 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1577 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1578 ha->addr); 1579 ibmvnic_send_crq(adapter, &crq); 1580 } 1581 } 1582 } 1583 } 1584 1585 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1586 { 1587 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1588 struct sockaddr *addr = p; 1589 union ibmvnic_crq crq; 1590 1591 if (!is_valid_ether_addr(addr->sa_data)) 1592 return -EADDRNOTAVAIL; 1593 1594 memset(&crq, 0, sizeof(crq)); 1595 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1596 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1597 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1598 1599 init_completion(&adapter->fw_done); 1600 ibmvnic_send_crq(adapter, &crq); 1601 wait_for_completion(&adapter->fw_done); 1602 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1603 return adapter->fw_done_rc ? -EIO : 0; 1604 } 1605 1606 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1607 { 1608 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1609 struct sockaddr *addr = p; 1610 int rc; 1611 1612 if (adapter->state == VNIC_PROBED) { 1613 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1614 adapter->mac_change_pending = true; 1615 return 0; 1616 } 1617 1618 rc = __ibmvnic_set_mac(netdev, addr); 1619 1620 return rc; 1621 } 1622 1623 /** 1624 * do_reset returns zero if we are able to keep processing reset events, or 1625 * non-zero if we hit a fatal error and must halt. 1626 */ 1627 static int do_reset(struct ibmvnic_adapter *adapter, 1628 struct ibmvnic_rwi *rwi, u32 reset_state) 1629 { 1630 u64 old_num_rx_queues, old_num_tx_queues; 1631 struct net_device *netdev = adapter->netdev; 1632 int i, rc; 1633 1634 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1635 rwi->reset_reason); 1636 1637 netif_carrier_off(netdev); 1638 adapter->reset_reason = rwi->reset_reason; 1639 1640 old_num_rx_queues = adapter->req_rx_queues; 1641 old_num_tx_queues = adapter->req_tx_queues; 1642 1643 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1644 rc = ibmvnic_reenable_crq_queue(adapter); 1645 if (rc) 1646 return 0; 1647 } 1648 1649 rc = __ibmvnic_close(netdev); 1650 if (rc) 1651 return rc; 1652 1653 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1654 adapter->wait_for_reset) { 1655 release_resources(adapter); 1656 release_sub_crqs(adapter); 1657 release_crq_queue(adapter); 1658 } 1659 1660 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1661 /* remove the closed state so when we call open it appears 1662 * we are coming from the probed state. 1663 */ 1664 adapter->state = VNIC_PROBED; 1665 1666 rc = ibmvnic_init(adapter); 1667 if (rc) 1668 return IBMVNIC_INIT_FAILED; 1669 1670 /* If the adapter was in PROBE state prior to the reset, 1671 * exit here. 1672 */ 1673 if (reset_state == VNIC_PROBED) 1674 return 0; 1675 1676 rc = ibmvnic_login(netdev); 1677 if (rc) { 1678 adapter->state = VNIC_PROBED; 1679 return 0; 1680 } 1681 1682 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1683 adapter->wait_for_reset) { 1684 rc = init_resources(adapter); 1685 if (rc) 1686 return rc; 1687 } else if (adapter->req_rx_queues != old_num_rx_queues || 1688 adapter->req_tx_queues != old_num_tx_queues) { 1689 adapter->map_id = 1; 1690 release_rx_pools(adapter); 1691 release_tx_pools(adapter); 1692 init_rx_pools(netdev); 1693 init_tx_pools(netdev); 1694 } else { 1695 rc = reset_tx_pools(adapter); 1696 if (rc) 1697 return rc; 1698 1699 rc = reset_rx_pools(adapter); 1700 if (rc) 1701 return rc; 1702 1703 if (reset_state == VNIC_CLOSED) 1704 return 0; 1705 } 1706 } 1707 1708 rc = __ibmvnic_open(netdev); 1709 if (rc) { 1710 if (list_empty(&adapter->rwi_list)) 1711 adapter->state = VNIC_CLOSED; 1712 else 1713 adapter->state = reset_state; 1714 1715 return 0; 1716 } 1717 1718 /* kick napi */ 1719 for (i = 0; i < adapter->req_rx_queues; i++) 1720 napi_schedule(&adapter->napi[i]); 1721 1722 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1723 netdev_notify_peers(netdev); 1724 1725 netif_carrier_on(netdev); 1726 1727 return 0; 1728 } 1729 1730 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1731 { 1732 struct ibmvnic_rwi *rwi; 1733 1734 mutex_lock(&adapter->rwi_lock); 1735 1736 if (!list_empty(&adapter->rwi_list)) { 1737 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1738 list); 1739 list_del(&rwi->list); 1740 } else { 1741 rwi = NULL; 1742 } 1743 1744 mutex_unlock(&adapter->rwi_lock); 1745 return rwi; 1746 } 1747 1748 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1749 { 1750 struct ibmvnic_rwi *rwi; 1751 1752 rwi = get_next_rwi(adapter); 1753 while (rwi) { 1754 kfree(rwi); 1755 rwi = get_next_rwi(adapter); 1756 } 1757 } 1758 1759 static void __ibmvnic_reset(struct work_struct *work) 1760 { 1761 struct ibmvnic_rwi *rwi; 1762 struct ibmvnic_adapter *adapter; 1763 struct net_device *netdev; 1764 u32 reset_state; 1765 int rc = 0; 1766 1767 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1768 netdev = adapter->netdev; 1769 1770 mutex_lock(&adapter->reset_lock); 1771 adapter->resetting = true; 1772 reset_state = adapter->state; 1773 1774 rwi = get_next_rwi(adapter); 1775 while (rwi) { 1776 rc = do_reset(adapter, rwi, reset_state); 1777 kfree(rwi); 1778 if (rc && rc != IBMVNIC_INIT_FAILED) 1779 break; 1780 1781 rwi = get_next_rwi(adapter); 1782 } 1783 1784 if (adapter->wait_for_reset) { 1785 adapter->wait_for_reset = false; 1786 adapter->reset_done_rc = rc; 1787 complete(&adapter->reset_done); 1788 } 1789 1790 if (rc) { 1791 netdev_dbg(adapter->netdev, "Reset failed\n"); 1792 free_all_rwi(adapter); 1793 mutex_unlock(&adapter->reset_lock); 1794 return; 1795 } 1796 1797 adapter->resetting = false; 1798 mutex_unlock(&adapter->reset_lock); 1799 } 1800 1801 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1802 enum ibmvnic_reset_reason reason) 1803 { 1804 struct ibmvnic_rwi *rwi, *tmp; 1805 struct net_device *netdev = adapter->netdev; 1806 struct list_head *entry; 1807 1808 if (adapter->state == VNIC_REMOVING || 1809 adapter->state == VNIC_REMOVED) { 1810 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1811 return; 1812 } 1813 1814 if (adapter->state == VNIC_PROBING) { 1815 netdev_warn(netdev, "Adapter reset during probe\n"); 1816 adapter->init_done_rc = EAGAIN; 1817 return; 1818 } 1819 1820 mutex_lock(&adapter->rwi_lock); 1821 1822 list_for_each(entry, &adapter->rwi_list) { 1823 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1824 if (tmp->reset_reason == reason) { 1825 netdev_dbg(netdev, "Skipping matching reset\n"); 1826 mutex_unlock(&adapter->rwi_lock); 1827 return; 1828 } 1829 } 1830 1831 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1832 if (!rwi) { 1833 mutex_unlock(&adapter->rwi_lock); 1834 ibmvnic_close(netdev); 1835 return; 1836 } 1837 1838 rwi->reset_reason = reason; 1839 list_add_tail(&rwi->list, &adapter->rwi_list); 1840 mutex_unlock(&adapter->rwi_lock); 1841 1842 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 1843 schedule_work(&adapter->ibmvnic_reset); 1844 } 1845 1846 static void ibmvnic_tx_timeout(struct net_device *dev) 1847 { 1848 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1849 1850 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1851 } 1852 1853 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1854 struct ibmvnic_rx_buff *rx_buff) 1855 { 1856 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1857 1858 rx_buff->skb = NULL; 1859 1860 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1861 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1862 1863 atomic_dec(&pool->available); 1864 } 1865 1866 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1867 { 1868 struct net_device *netdev = napi->dev; 1869 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1870 int scrq_num = (int)(napi - adapter->napi); 1871 int frames_processed = 0; 1872 1873 restart_poll: 1874 while (frames_processed < budget) { 1875 struct sk_buff *skb; 1876 struct ibmvnic_rx_buff *rx_buff; 1877 union sub_crq *next; 1878 u32 length; 1879 u16 offset; 1880 u8 flags = 0; 1881 1882 if (unlikely(adapter->resetting && 1883 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 1884 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1885 napi_complete_done(napi, frames_processed); 1886 return frames_processed; 1887 } 1888 1889 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1890 break; 1891 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1892 rx_buff = 1893 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1894 rx_comp.correlator); 1895 /* do error checking */ 1896 if (next->rx_comp.rc) { 1897 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 1898 be16_to_cpu(next->rx_comp.rc)); 1899 /* free the entry */ 1900 next->rx_comp.first = 0; 1901 dev_kfree_skb_any(rx_buff->skb); 1902 remove_buff_from_pool(adapter, rx_buff); 1903 continue; 1904 } else if (!rx_buff->skb) { 1905 /* free the entry */ 1906 next->rx_comp.first = 0; 1907 remove_buff_from_pool(adapter, rx_buff); 1908 continue; 1909 } 1910 1911 length = be32_to_cpu(next->rx_comp.len); 1912 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1913 flags = next->rx_comp.flags; 1914 skb = rx_buff->skb; 1915 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1916 length); 1917 1918 /* VLAN Header has been stripped by the system firmware and 1919 * needs to be inserted by the driver 1920 */ 1921 if (adapter->rx_vlan_header_insertion && 1922 (flags & IBMVNIC_VLAN_STRIPPED)) 1923 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1924 ntohs(next->rx_comp.vlan_tci)); 1925 1926 /* free the entry */ 1927 next->rx_comp.first = 0; 1928 remove_buff_from_pool(adapter, rx_buff); 1929 1930 skb_put(skb, length); 1931 skb->protocol = eth_type_trans(skb, netdev); 1932 skb_record_rx_queue(skb, scrq_num); 1933 1934 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1935 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1936 skb->ip_summed = CHECKSUM_UNNECESSARY; 1937 } 1938 1939 length = skb->len; 1940 napi_gro_receive(napi, skb); /* send it up */ 1941 netdev->stats.rx_packets++; 1942 netdev->stats.rx_bytes += length; 1943 adapter->rx_stats_buffers[scrq_num].packets++; 1944 adapter->rx_stats_buffers[scrq_num].bytes += length; 1945 frames_processed++; 1946 } 1947 1948 if (adapter->state != VNIC_CLOSING) 1949 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1950 1951 if (frames_processed < budget) { 1952 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1953 napi_complete_done(napi, frames_processed); 1954 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1955 napi_reschedule(napi)) { 1956 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1957 goto restart_poll; 1958 } 1959 } 1960 return frames_processed; 1961 } 1962 1963 #ifdef CONFIG_NET_POLL_CONTROLLER 1964 static void ibmvnic_netpoll_controller(struct net_device *dev) 1965 { 1966 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1967 int i; 1968 1969 replenish_pools(netdev_priv(dev)); 1970 for (i = 0; i < adapter->req_rx_queues; i++) 1971 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1972 adapter->rx_scrq[i]); 1973 } 1974 #endif 1975 1976 static int wait_for_reset(struct ibmvnic_adapter *adapter) 1977 { 1978 adapter->fallback.mtu = adapter->req_mtu; 1979 adapter->fallback.rx_queues = adapter->req_rx_queues; 1980 adapter->fallback.tx_queues = adapter->req_tx_queues; 1981 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 1982 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 1983 1984 init_completion(&adapter->reset_done); 1985 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 1986 adapter->wait_for_reset = true; 1987 wait_for_completion(&adapter->reset_done); 1988 1989 if (adapter->reset_done_rc) { 1990 adapter->desired.mtu = adapter->fallback.mtu; 1991 adapter->desired.rx_queues = adapter->fallback.rx_queues; 1992 adapter->desired.tx_queues = adapter->fallback.tx_queues; 1993 adapter->desired.rx_entries = adapter->fallback.rx_entries; 1994 adapter->desired.tx_entries = adapter->fallback.tx_entries; 1995 1996 init_completion(&adapter->reset_done); 1997 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 1998 wait_for_completion(&adapter->reset_done); 1999 } 2000 adapter->wait_for_reset = false; 2001 2002 return adapter->reset_done_rc; 2003 } 2004 2005 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2006 { 2007 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2008 2009 adapter->desired.mtu = new_mtu + ETH_HLEN; 2010 2011 return wait_for_reset(adapter); 2012 } 2013 2014 static const struct net_device_ops ibmvnic_netdev_ops = { 2015 .ndo_open = ibmvnic_open, 2016 .ndo_stop = ibmvnic_close, 2017 .ndo_start_xmit = ibmvnic_xmit, 2018 .ndo_set_rx_mode = ibmvnic_set_multi, 2019 .ndo_set_mac_address = ibmvnic_set_mac, 2020 .ndo_validate_addr = eth_validate_addr, 2021 .ndo_tx_timeout = ibmvnic_tx_timeout, 2022 #ifdef CONFIG_NET_POLL_CONTROLLER 2023 .ndo_poll_controller = ibmvnic_netpoll_controller, 2024 #endif 2025 .ndo_change_mtu = ibmvnic_change_mtu, 2026 }; 2027 2028 /* ethtool functions */ 2029 2030 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2031 struct ethtool_link_ksettings *cmd) 2032 { 2033 u32 supported, advertising; 2034 2035 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2036 SUPPORTED_FIBRE); 2037 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2038 ADVERTISED_FIBRE); 2039 cmd->base.speed = SPEED_1000; 2040 cmd->base.duplex = DUPLEX_FULL; 2041 cmd->base.port = PORT_FIBRE; 2042 cmd->base.phy_address = 0; 2043 cmd->base.autoneg = AUTONEG_ENABLE; 2044 2045 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2046 supported); 2047 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2048 advertising); 2049 2050 return 0; 2051 } 2052 2053 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2054 struct ethtool_drvinfo *info) 2055 { 2056 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2057 2058 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2059 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2060 strlcpy(info->fw_version, adapter->fw_version, 2061 sizeof(info->fw_version)); 2062 } 2063 2064 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2065 { 2066 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2067 2068 return adapter->msg_enable; 2069 } 2070 2071 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2072 { 2073 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2074 2075 adapter->msg_enable = data; 2076 } 2077 2078 static u32 ibmvnic_get_link(struct net_device *netdev) 2079 { 2080 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2081 2082 /* Don't need to send a query because we request a logical link up at 2083 * init and then we wait for link state indications 2084 */ 2085 return adapter->logical_link_state; 2086 } 2087 2088 static void ibmvnic_get_ringparam(struct net_device *netdev, 2089 struct ethtool_ringparam *ring) 2090 { 2091 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2092 2093 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2094 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2095 ring->rx_mini_max_pending = 0; 2096 ring->rx_jumbo_max_pending = 0; 2097 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2098 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2099 ring->rx_mini_pending = 0; 2100 ring->rx_jumbo_pending = 0; 2101 } 2102 2103 static int ibmvnic_set_ringparam(struct net_device *netdev, 2104 struct ethtool_ringparam *ring) 2105 { 2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2107 2108 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2109 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2110 netdev_err(netdev, "Invalid request.\n"); 2111 netdev_err(netdev, "Max tx buffers = %llu\n", 2112 adapter->max_rx_add_entries_per_subcrq); 2113 netdev_err(netdev, "Max rx buffers = %llu\n", 2114 adapter->max_tx_entries_per_subcrq); 2115 return -EINVAL; 2116 } 2117 2118 adapter->desired.rx_entries = ring->rx_pending; 2119 adapter->desired.tx_entries = ring->tx_pending; 2120 2121 return wait_for_reset(adapter); 2122 } 2123 2124 static void ibmvnic_get_channels(struct net_device *netdev, 2125 struct ethtool_channels *channels) 2126 { 2127 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2128 2129 channels->max_rx = adapter->max_rx_queues; 2130 channels->max_tx = adapter->max_tx_queues; 2131 channels->max_other = 0; 2132 channels->max_combined = 0; 2133 channels->rx_count = adapter->req_rx_queues; 2134 channels->tx_count = adapter->req_tx_queues; 2135 channels->other_count = 0; 2136 channels->combined_count = 0; 2137 } 2138 2139 static int ibmvnic_set_channels(struct net_device *netdev, 2140 struct ethtool_channels *channels) 2141 { 2142 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2143 2144 adapter->desired.rx_queues = channels->rx_count; 2145 adapter->desired.tx_queues = channels->tx_count; 2146 2147 return wait_for_reset(adapter); 2148 } 2149 2150 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2151 { 2152 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2153 int i; 2154 2155 if (stringset != ETH_SS_STATS) 2156 return; 2157 2158 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2159 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2160 2161 for (i = 0; i < adapter->req_tx_queues; i++) { 2162 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2163 data += ETH_GSTRING_LEN; 2164 2165 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2166 data += ETH_GSTRING_LEN; 2167 2168 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2169 data += ETH_GSTRING_LEN; 2170 } 2171 2172 for (i = 0; i < adapter->req_rx_queues; i++) { 2173 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2174 data += ETH_GSTRING_LEN; 2175 2176 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2177 data += ETH_GSTRING_LEN; 2178 2179 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2180 data += ETH_GSTRING_LEN; 2181 } 2182 } 2183 2184 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2185 { 2186 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2187 2188 switch (sset) { 2189 case ETH_SS_STATS: 2190 return ARRAY_SIZE(ibmvnic_stats) + 2191 adapter->req_tx_queues * NUM_TX_STATS + 2192 adapter->req_rx_queues * NUM_RX_STATS; 2193 default: 2194 return -EOPNOTSUPP; 2195 } 2196 } 2197 2198 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2199 struct ethtool_stats *stats, u64 *data) 2200 { 2201 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2202 union ibmvnic_crq crq; 2203 int i, j; 2204 2205 memset(&crq, 0, sizeof(crq)); 2206 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2207 crq.request_statistics.cmd = REQUEST_STATISTICS; 2208 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2209 crq.request_statistics.len = 2210 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2211 2212 /* Wait for data to be written */ 2213 init_completion(&adapter->stats_done); 2214 ibmvnic_send_crq(adapter, &crq); 2215 wait_for_completion(&adapter->stats_done); 2216 2217 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2218 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2219 ibmvnic_stats[i].offset)); 2220 2221 for (j = 0; j < adapter->req_tx_queues; j++) { 2222 data[i] = adapter->tx_stats_buffers[j].packets; 2223 i++; 2224 data[i] = adapter->tx_stats_buffers[j].bytes; 2225 i++; 2226 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2227 i++; 2228 } 2229 2230 for (j = 0; j < adapter->req_rx_queues; j++) { 2231 data[i] = adapter->rx_stats_buffers[j].packets; 2232 i++; 2233 data[i] = adapter->rx_stats_buffers[j].bytes; 2234 i++; 2235 data[i] = adapter->rx_stats_buffers[j].interrupts; 2236 i++; 2237 } 2238 } 2239 2240 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2241 .get_drvinfo = ibmvnic_get_drvinfo, 2242 .get_msglevel = ibmvnic_get_msglevel, 2243 .set_msglevel = ibmvnic_set_msglevel, 2244 .get_link = ibmvnic_get_link, 2245 .get_ringparam = ibmvnic_get_ringparam, 2246 .set_ringparam = ibmvnic_set_ringparam, 2247 .get_channels = ibmvnic_get_channels, 2248 .set_channels = ibmvnic_set_channels, 2249 .get_strings = ibmvnic_get_strings, 2250 .get_sset_count = ibmvnic_get_sset_count, 2251 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2252 .get_link_ksettings = ibmvnic_get_link_ksettings, 2253 }; 2254 2255 /* Routines for managing CRQs/sCRQs */ 2256 2257 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2258 struct ibmvnic_sub_crq_queue *scrq) 2259 { 2260 int rc; 2261 2262 if (scrq->irq) { 2263 free_irq(scrq->irq, scrq); 2264 irq_dispose_mapping(scrq->irq); 2265 scrq->irq = 0; 2266 } 2267 2268 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2269 scrq->cur = 0; 2270 2271 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2272 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2273 return rc; 2274 } 2275 2276 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2277 { 2278 int i, rc; 2279 2280 for (i = 0; i < adapter->req_tx_queues; i++) { 2281 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2282 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2283 if (rc) 2284 return rc; 2285 } 2286 2287 for (i = 0; i < adapter->req_rx_queues; i++) { 2288 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2289 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2290 if (rc) 2291 return rc; 2292 } 2293 2294 return rc; 2295 } 2296 2297 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2298 struct ibmvnic_sub_crq_queue *scrq) 2299 { 2300 struct device *dev = &adapter->vdev->dev; 2301 long rc; 2302 2303 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2304 2305 /* Close the sub-crqs */ 2306 do { 2307 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2308 adapter->vdev->unit_address, 2309 scrq->crq_num); 2310 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2311 2312 if (rc) { 2313 netdev_err(adapter->netdev, 2314 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2315 scrq->crq_num, rc); 2316 } 2317 2318 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2319 DMA_BIDIRECTIONAL); 2320 free_pages((unsigned long)scrq->msgs, 2); 2321 kfree(scrq); 2322 } 2323 2324 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2325 *adapter) 2326 { 2327 struct device *dev = &adapter->vdev->dev; 2328 struct ibmvnic_sub_crq_queue *scrq; 2329 int rc; 2330 2331 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2332 if (!scrq) 2333 return NULL; 2334 2335 scrq->msgs = 2336 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2337 if (!scrq->msgs) { 2338 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2339 goto zero_page_failed; 2340 } 2341 2342 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2343 DMA_BIDIRECTIONAL); 2344 if (dma_mapping_error(dev, scrq->msg_token)) { 2345 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2346 goto map_failed; 2347 } 2348 2349 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2350 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2351 2352 if (rc == H_RESOURCE) 2353 rc = ibmvnic_reset_crq(adapter); 2354 2355 if (rc == H_CLOSED) { 2356 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2357 } else if (rc) { 2358 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2359 goto reg_failed; 2360 } 2361 2362 scrq->adapter = adapter; 2363 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2364 spin_lock_init(&scrq->lock); 2365 2366 netdev_dbg(adapter->netdev, 2367 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2368 scrq->crq_num, scrq->hw_irq, scrq->irq); 2369 2370 return scrq; 2371 2372 reg_failed: 2373 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2374 DMA_BIDIRECTIONAL); 2375 map_failed: 2376 free_pages((unsigned long)scrq->msgs, 2); 2377 zero_page_failed: 2378 kfree(scrq); 2379 2380 return NULL; 2381 } 2382 2383 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 2384 { 2385 int i; 2386 2387 if (adapter->tx_scrq) { 2388 for (i = 0; i < adapter->req_tx_queues; i++) { 2389 if (!adapter->tx_scrq[i]) 2390 continue; 2391 2392 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2393 i); 2394 if (adapter->tx_scrq[i]->irq) { 2395 free_irq(adapter->tx_scrq[i]->irq, 2396 adapter->tx_scrq[i]); 2397 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2398 adapter->tx_scrq[i]->irq = 0; 2399 } 2400 2401 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2402 } 2403 2404 kfree(adapter->tx_scrq); 2405 adapter->tx_scrq = NULL; 2406 } 2407 2408 if (adapter->rx_scrq) { 2409 for (i = 0; i < adapter->req_rx_queues; i++) { 2410 if (!adapter->rx_scrq[i]) 2411 continue; 2412 2413 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2414 i); 2415 if (adapter->rx_scrq[i]->irq) { 2416 free_irq(adapter->rx_scrq[i]->irq, 2417 adapter->rx_scrq[i]); 2418 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2419 adapter->rx_scrq[i]->irq = 0; 2420 } 2421 2422 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2423 } 2424 2425 kfree(adapter->rx_scrq); 2426 adapter->rx_scrq = NULL; 2427 } 2428 } 2429 2430 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2431 struct ibmvnic_sub_crq_queue *scrq) 2432 { 2433 struct device *dev = &adapter->vdev->dev; 2434 unsigned long rc; 2435 2436 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2437 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2438 if (rc) 2439 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2440 scrq->hw_irq, rc); 2441 return rc; 2442 } 2443 2444 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2445 struct ibmvnic_sub_crq_queue *scrq) 2446 { 2447 struct device *dev = &adapter->vdev->dev; 2448 unsigned long rc; 2449 2450 if (scrq->hw_irq > 0x100000000ULL) { 2451 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2452 return 1; 2453 } 2454 2455 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2456 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2457 if (rc) 2458 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2459 scrq->hw_irq, rc); 2460 return rc; 2461 } 2462 2463 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2464 struct ibmvnic_sub_crq_queue *scrq) 2465 { 2466 struct device *dev = &adapter->vdev->dev; 2467 struct ibmvnic_tx_buff *txbuff; 2468 union sub_crq *next; 2469 int index; 2470 int i, j; 2471 u8 first; 2472 2473 restart_loop: 2474 while (pending_scrq(adapter, scrq)) { 2475 unsigned int pool = scrq->pool_index; 2476 2477 next = ibmvnic_next_scrq(adapter, scrq); 2478 for (i = 0; i < next->tx_comp.num_comps; i++) { 2479 if (next->tx_comp.rcs[i]) { 2480 dev_err(dev, "tx error %x\n", 2481 next->tx_comp.rcs[i]); 2482 continue; 2483 } 2484 index = be32_to_cpu(next->tx_comp.correlators[i]); 2485 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 2486 2487 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2488 if (!txbuff->data_dma[j]) 2489 continue; 2490 2491 txbuff->data_dma[j] = 0; 2492 } 2493 /* if sub_crq was sent indirectly */ 2494 first = txbuff->indir_arr[0].generic.first; 2495 if (first == IBMVNIC_CRQ_CMD) { 2496 dma_unmap_single(dev, txbuff->indir_dma, 2497 sizeof(txbuff->indir_arr), 2498 DMA_TO_DEVICE); 2499 } 2500 2501 if (txbuff->last_frag) { 2502 dev_kfree_skb_any(txbuff->skb); 2503 txbuff->skb = NULL; 2504 } 2505 2506 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2507 producer_index] = index; 2508 adapter->tx_pool[pool].producer_index = 2509 (adapter->tx_pool[pool].producer_index + 1) % 2510 adapter->req_tx_entries_per_subcrq; 2511 } 2512 /* remove tx_comp scrq*/ 2513 next->tx_comp.first = 0; 2514 2515 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 2516 (adapter->req_tx_entries_per_subcrq / 2) && 2517 __netif_subqueue_stopped(adapter->netdev, 2518 scrq->pool_index)) { 2519 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2520 netdev_info(adapter->netdev, "Started queue %d\n", 2521 scrq->pool_index); 2522 } 2523 } 2524 2525 enable_scrq_irq(adapter, scrq); 2526 2527 if (pending_scrq(adapter, scrq)) { 2528 disable_scrq_irq(adapter, scrq); 2529 goto restart_loop; 2530 } 2531 2532 return 0; 2533 } 2534 2535 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2536 { 2537 struct ibmvnic_sub_crq_queue *scrq = instance; 2538 struct ibmvnic_adapter *adapter = scrq->adapter; 2539 2540 disable_scrq_irq(adapter, scrq); 2541 ibmvnic_complete_tx(adapter, scrq); 2542 2543 return IRQ_HANDLED; 2544 } 2545 2546 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2547 { 2548 struct ibmvnic_sub_crq_queue *scrq = instance; 2549 struct ibmvnic_adapter *adapter = scrq->adapter; 2550 2551 /* When booting a kdump kernel we can hit pending interrupts 2552 * prior to completing driver initialization. 2553 */ 2554 if (unlikely(adapter->state != VNIC_OPEN)) 2555 return IRQ_NONE; 2556 2557 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2558 2559 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2560 disable_scrq_irq(adapter, scrq); 2561 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2562 } 2563 2564 return IRQ_HANDLED; 2565 } 2566 2567 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2568 { 2569 struct device *dev = &adapter->vdev->dev; 2570 struct ibmvnic_sub_crq_queue *scrq; 2571 int i = 0, j = 0; 2572 int rc = 0; 2573 2574 for (i = 0; i < adapter->req_tx_queues; i++) { 2575 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2576 i); 2577 scrq = adapter->tx_scrq[i]; 2578 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2579 2580 if (!scrq->irq) { 2581 rc = -EINVAL; 2582 dev_err(dev, "Error mapping irq\n"); 2583 goto req_tx_irq_failed; 2584 } 2585 2586 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2587 0, "ibmvnic_tx", scrq); 2588 2589 if (rc) { 2590 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2591 scrq->irq, rc); 2592 irq_dispose_mapping(scrq->irq); 2593 goto req_rx_irq_failed; 2594 } 2595 } 2596 2597 for (i = 0; i < adapter->req_rx_queues; i++) { 2598 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2599 i); 2600 scrq = adapter->rx_scrq[i]; 2601 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2602 if (!scrq->irq) { 2603 rc = -EINVAL; 2604 dev_err(dev, "Error mapping irq\n"); 2605 goto req_rx_irq_failed; 2606 } 2607 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2608 0, "ibmvnic_rx", scrq); 2609 if (rc) { 2610 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2611 scrq->irq, rc); 2612 irq_dispose_mapping(scrq->irq); 2613 goto req_rx_irq_failed; 2614 } 2615 } 2616 return rc; 2617 2618 req_rx_irq_failed: 2619 for (j = 0; j < i; j++) { 2620 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2621 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2622 } 2623 i = adapter->req_tx_queues; 2624 req_tx_irq_failed: 2625 for (j = 0; j < i; j++) { 2626 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2627 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2628 } 2629 release_sub_crqs(adapter); 2630 return rc; 2631 } 2632 2633 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2634 { 2635 struct device *dev = &adapter->vdev->dev; 2636 struct ibmvnic_sub_crq_queue **allqueues; 2637 int registered_queues = 0; 2638 int total_queues; 2639 int more = 0; 2640 int i; 2641 2642 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2643 2644 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2645 if (!allqueues) 2646 return -1; 2647 2648 for (i = 0; i < total_queues; i++) { 2649 allqueues[i] = init_sub_crq_queue(adapter); 2650 if (!allqueues[i]) { 2651 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2652 break; 2653 } 2654 registered_queues++; 2655 } 2656 2657 /* Make sure we were able to register the minimum number of queues */ 2658 if (registered_queues < 2659 adapter->min_tx_queues + adapter->min_rx_queues) { 2660 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2661 goto tx_failed; 2662 } 2663 2664 /* Distribute the failed allocated queues*/ 2665 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2666 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2667 switch (i % 3) { 2668 case 0: 2669 if (adapter->req_rx_queues > adapter->min_rx_queues) 2670 adapter->req_rx_queues--; 2671 else 2672 more++; 2673 break; 2674 case 1: 2675 if (adapter->req_tx_queues > adapter->min_tx_queues) 2676 adapter->req_tx_queues--; 2677 else 2678 more++; 2679 break; 2680 } 2681 } 2682 2683 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2684 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2685 if (!adapter->tx_scrq) 2686 goto tx_failed; 2687 2688 for (i = 0; i < adapter->req_tx_queues; i++) { 2689 adapter->tx_scrq[i] = allqueues[i]; 2690 adapter->tx_scrq[i]->pool_index = i; 2691 } 2692 2693 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2694 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2695 if (!adapter->rx_scrq) 2696 goto rx_failed; 2697 2698 for (i = 0; i < adapter->req_rx_queues; i++) { 2699 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2700 adapter->rx_scrq[i]->scrq_num = i; 2701 } 2702 2703 kfree(allqueues); 2704 return 0; 2705 2706 rx_failed: 2707 kfree(adapter->tx_scrq); 2708 adapter->tx_scrq = NULL; 2709 tx_failed: 2710 for (i = 0; i < registered_queues; i++) 2711 release_sub_crq_queue(adapter, allqueues[i]); 2712 kfree(allqueues); 2713 return -1; 2714 } 2715 2716 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2717 { 2718 struct device *dev = &adapter->vdev->dev; 2719 union ibmvnic_crq crq; 2720 int max_entries; 2721 2722 if (!retry) { 2723 /* Sub-CRQ entries are 32 byte long */ 2724 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2725 2726 if (adapter->min_tx_entries_per_subcrq > entries_page || 2727 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2728 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2729 return; 2730 } 2731 2732 if (adapter->desired.mtu) 2733 adapter->req_mtu = adapter->desired.mtu; 2734 else 2735 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2736 2737 if (!adapter->desired.tx_entries) 2738 adapter->desired.tx_entries = 2739 adapter->max_tx_entries_per_subcrq; 2740 if (!adapter->desired.rx_entries) 2741 adapter->desired.rx_entries = 2742 adapter->max_rx_add_entries_per_subcrq; 2743 2744 max_entries = IBMVNIC_MAX_LTB_SIZE / 2745 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 2746 2747 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2748 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 2749 adapter->desired.tx_entries = max_entries; 2750 } 2751 2752 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2753 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 2754 adapter->desired.rx_entries = max_entries; 2755 } 2756 2757 if (adapter->desired.tx_entries) 2758 adapter->req_tx_entries_per_subcrq = 2759 adapter->desired.tx_entries; 2760 else 2761 adapter->req_tx_entries_per_subcrq = 2762 adapter->max_tx_entries_per_subcrq; 2763 2764 if (adapter->desired.rx_entries) 2765 adapter->req_rx_add_entries_per_subcrq = 2766 adapter->desired.rx_entries; 2767 else 2768 adapter->req_rx_add_entries_per_subcrq = 2769 adapter->max_rx_add_entries_per_subcrq; 2770 2771 if (adapter->desired.tx_queues) 2772 adapter->req_tx_queues = 2773 adapter->desired.tx_queues; 2774 else 2775 adapter->req_tx_queues = 2776 adapter->opt_tx_comp_sub_queues; 2777 2778 if (adapter->desired.rx_queues) 2779 adapter->req_rx_queues = 2780 adapter->desired.rx_queues; 2781 else 2782 adapter->req_rx_queues = 2783 adapter->opt_rx_comp_queues; 2784 2785 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2786 } 2787 2788 memset(&crq, 0, sizeof(crq)); 2789 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2790 crq.request_capability.cmd = REQUEST_CAPABILITY; 2791 2792 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2793 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2794 atomic_inc(&adapter->running_cap_crqs); 2795 ibmvnic_send_crq(adapter, &crq); 2796 2797 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2798 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2799 atomic_inc(&adapter->running_cap_crqs); 2800 ibmvnic_send_crq(adapter, &crq); 2801 2802 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2803 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2804 atomic_inc(&adapter->running_cap_crqs); 2805 ibmvnic_send_crq(adapter, &crq); 2806 2807 crq.request_capability.capability = 2808 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2809 crq.request_capability.number = 2810 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2811 atomic_inc(&adapter->running_cap_crqs); 2812 ibmvnic_send_crq(adapter, &crq); 2813 2814 crq.request_capability.capability = 2815 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2816 crq.request_capability.number = 2817 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2818 atomic_inc(&adapter->running_cap_crqs); 2819 ibmvnic_send_crq(adapter, &crq); 2820 2821 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2822 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2823 atomic_inc(&adapter->running_cap_crqs); 2824 ibmvnic_send_crq(adapter, &crq); 2825 2826 if (adapter->netdev->flags & IFF_PROMISC) { 2827 if (adapter->promisc_supported) { 2828 crq.request_capability.capability = 2829 cpu_to_be16(PROMISC_REQUESTED); 2830 crq.request_capability.number = cpu_to_be64(1); 2831 atomic_inc(&adapter->running_cap_crqs); 2832 ibmvnic_send_crq(adapter, &crq); 2833 } 2834 } else { 2835 crq.request_capability.capability = 2836 cpu_to_be16(PROMISC_REQUESTED); 2837 crq.request_capability.number = cpu_to_be64(0); 2838 atomic_inc(&adapter->running_cap_crqs); 2839 ibmvnic_send_crq(adapter, &crq); 2840 } 2841 } 2842 2843 static int pending_scrq(struct ibmvnic_adapter *adapter, 2844 struct ibmvnic_sub_crq_queue *scrq) 2845 { 2846 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2847 2848 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2849 return 1; 2850 else 2851 return 0; 2852 } 2853 2854 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2855 struct ibmvnic_sub_crq_queue *scrq) 2856 { 2857 union sub_crq *entry; 2858 unsigned long flags; 2859 2860 spin_lock_irqsave(&scrq->lock, flags); 2861 entry = &scrq->msgs[scrq->cur]; 2862 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2863 if (++scrq->cur == scrq->size) 2864 scrq->cur = 0; 2865 } else { 2866 entry = NULL; 2867 } 2868 spin_unlock_irqrestore(&scrq->lock, flags); 2869 2870 return entry; 2871 } 2872 2873 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2874 { 2875 struct ibmvnic_crq_queue *queue = &adapter->crq; 2876 union ibmvnic_crq *crq; 2877 2878 crq = &queue->msgs[queue->cur]; 2879 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2880 if (++queue->cur == queue->size) 2881 queue->cur = 0; 2882 } else { 2883 crq = NULL; 2884 } 2885 2886 return crq; 2887 } 2888 2889 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2890 union sub_crq *sub_crq) 2891 { 2892 unsigned int ua = adapter->vdev->unit_address; 2893 struct device *dev = &adapter->vdev->dev; 2894 u64 *u64_crq = (u64 *)sub_crq; 2895 int rc; 2896 2897 netdev_dbg(adapter->netdev, 2898 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2899 (unsigned long int)cpu_to_be64(remote_handle), 2900 (unsigned long int)cpu_to_be64(u64_crq[0]), 2901 (unsigned long int)cpu_to_be64(u64_crq[1]), 2902 (unsigned long int)cpu_to_be64(u64_crq[2]), 2903 (unsigned long int)cpu_to_be64(u64_crq[3])); 2904 2905 /* Make sure the hypervisor sees the complete request */ 2906 mb(); 2907 2908 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2909 cpu_to_be64(remote_handle), 2910 cpu_to_be64(u64_crq[0]), 2911 cpu_to_be64(u64_crq[1]), 2912 cpu_to_be64(u64_crq[2]), 2913 cpu_to_be64(u64_crq[3])); 2914 2915 if (rc) { 2916 if (rc == H_CLOSED) 2917 dev_warn(dev, "CRQ Queue closed\n"); 2918 dev_err(dev, "Send error (rc=%d)\n", rc); 2919 } 2920 2921 return rc; 2922 } 2923 2924 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2925 u64 remote_handle, u64 ioba, u64 num_entries) 2926 { 2927 unsigned int ua = adapter->vdev->unit_address; 2928 struct device *dev = &adapter->vdev->dev; 2929 int rc; 2930 2931 /* Make sure the hypervisor sees the complete request */ 2932 mb(); 2933 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2934 cpu_to_be64(remote_handle), 2935 ioba, num_entries); 2936 2937 if (rc) { 2938 if (rc == H_CLOSED) 2939 dev_warn(dev, "CRQ Queue closed\n"); 2940 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2941 } 2942 2943 return rc; 2944 } 2945 2946 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2947 union ibmvnic_crq *crq) 2948 { 2949 unsigned int ua = adapter->vdev->unit_address; 2950 struct device *dev = &adapter->vdev->dev; 2951 u64 *u64_crq = (u64 *)crq; 2952 int rc; 2953 2954 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2955 (unsigned long int)cpu_to_be64(u64_crq[0]), 2956 (unsigned long int)cpu_to_be64(u64_crq[1])); 2957 2958 /* Make sure the hypervisor sees the complete request */ 2959 mb(); 2960 2961 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2962 cpu_to_be64(u64_crq[0]), 2963 cpu_to_be64(u64_crq[1])); 2964 2965 if (rc) { 2966 if (rc == H_CLOSED) { 2967 dev_warn(dev, "CRQ Queue closed\n"); 2968 if (adapter->resetting) 2969 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2970 } 2971 2972 dev_warn(dev, "Send error (rc=%d)\n", rc); 2973 } 2974 2975 return rc; 2976 } 2977 2978 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2979 { 2980 union ibmvnic_crq crq; 2981 2982 memset(&crq, 0, sizeof(crq)); 2983 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2984 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2985 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2986 2987 return ibmvnic_send_crq(adapter, &crq); 2988 } 2989 2990 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2991 { 2992 union ibmvnic_crq crq; 2993 2994 memset(&crq, 0, sizeof(crq)); 2995 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2996 crq.version_exchange.cmd = VERSION_EXCHANGE; 2997 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2998 2999 return ibmvnic_send_crq(adapter, &crq); 3000 } 3001 3002 struct vnic_login_client_data { 3003 u8 type; 3004 __be16 len; 3005 char name; 3006 } __packed; 3007 3008 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3009 { 3010 int len; 3011 3012 /* Calculate the amount of buffer space needed for the 3013 * vnic client data in the login buffer. There are four entries, 3014 * OS name, LPAR name, device name, and a null last entry. 3015 */ 3016 len = 4 * sizeof(struct vnic_login_client_data); 3017 len += 6; /* "Linux" plus NULL */ 3018 len += strlen(utsname()->nodename) + 1; 3019 len += strlen(adapter->netdev->name) + 1; 3020 3021 return len; 3022 } 3023 3024 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3025 struct vnic_login_client_data *vlcd) 3026 { 3027 const char *os_name = "Linux"; 3028 int len; 3029 3030 /* Type 1 - LPAR OS */ 3031 vlcd->type = 1; 3032 len = strlen(os_name) + 1; 3033 vlcd->len = cpu_to_be16(len); 3034 strncpy(&vlcd->name, os_name, len); 3035 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3036 3037 /* Type 2 - LPAR name */ 3038 vlcd->type = 2; 3039 len = strlen(utsname()->nodename) + 1; 3040 vlcd->len = cpu_to_be16(len); 3041 strncpy(&vlcd->name, utsname()->nodename, len); 3042 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3043 3044 /* Type 3 - device name */ 3045 vlcd->type = 3; 3046 len = strlen(adapter->netdev->name) + 1; 3047 vlcd->len = cpu_to_be16(len); 3048 strncpy(&vlcd->name, adapter->netdev->name, len); 3049 } 3050 3051 static void send_login(struct ibmvnic_adapter *adapter) 3052 { 3053 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3054 struct ibmvnic_login_buffer *login_buffer; 3055 struct device *dev = &adapter->vdev->dev; 3056 dma_addr_t rsp_buffer_token; 3057 dma_addr_t buffer_token; 3058 size_t rsp_buffer_size; 3059 union ibmvnic_crq crq; 3060 size_t buffer_size; 3061 __be64 *tx_list_p; 3062 __be64 *rx_list_p; 3063 int client_data_len; 3064 struct vnic_login_client_data *vlcd; 3065 int i; 3066 3067 release_login_rsp_buffer(adapter); 3068 client_data_len = vnic_client_data_len(adapter); 3069 3070 buffer_size = 3071 sizeof(struct ibmvnic_login_buffer) + 3072 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3073 client_data_len; 3074 3075 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3076 if (!login_buffer) 3077 goto buf_alloc_failed; 3078 3079 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3080 DMA_TO_DEVICE); 3081 if (dma_mapping_error(dev, buffer_token)) { 3082 dev_err(dev, "Couldn't map login buffer\n"); 3083 goto buf_map_failed; 3084 } 3085 3086 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3087 sizeof(u64) * adapter->req_tx_queues + 3088 sizeof(u64) * adapter->req_rx_queues + 3089 sizeof(u64) * adapter->req_rx_queues + 3090 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3091 3092 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3093 if (!login_rsp_buffer) 3094 goto buf_rsp_alloc_failed; 3095 3096 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3097 rsp_buffer_size, DMA_FROM_DEVICE); 3098 if (dma_mapping_error(dev, rsp_buffer_token)) { 3099 dev_err(dev, "Couldn't map login rsp buffer\n"); 3100 goto buf_rsp_map_failed; 3101 } 3102 3103 adapter->login_buf = login_buffer; 3104 adapter->login_buf_token = buffer_token; 3105 adapter->login_buf_sz = buffer_size; 3106 adapter->login_rsp_buf = login_rsp_buffer; 3107 adapter->login_rsp_buf_token = rsp_buffer_token; 3108 adapter->login_rsp_buf_sz = rsp_buffer_size; 3109 3110 login_buffer->len = cpu_to_be32(buffer_size); 3111 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3112 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3113 login_buffer->off_txcomp_subcrqs = 3114 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3115 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3116 login_buffer->off_rxcomp_subcrqs = 3117 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3118 sizeof(u64) * adapter->req_tx_queues); 3119 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3120 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3121 3122 tx_list_p = (__be64 *)((char *)login_buffer + 3123 sizeof(struct ibmvnic_login_buffer)); 3124 rx_list_p = (__be64 *)((char *)login_buffer + 3125 sizeof(struct ibmvnic_login_buffer) + 3126 sizeof(u64) * adapter->req_tx_queues); 3127 3128 for (i = 0; i < adapter->req_tx_queues; i++) { 3129 if (adapter->tx_scrq[i]) { 3130 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3131 crq_num); 3132 } 3133 } 3134 3135 for (i = 0; i < adapter->req_rx_queues; i++) { 3136 if (adapter->rx_scrq[i]) { 3137 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3138 crq_num); 3139 } 3140 } 3141 3142 /* Insert vNIC login client data */ 3143 vlcd = (struct vnic_login_client_data *) 3144 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3145 login_buffer->client_data_offset = 3146 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3147 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3148 3149 vnic_add_client_data(adapter, vlcd); 3150 3151 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3152 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3153 netdev_dbg(adapter->netdev, "%016lx\n", 3154 ((unsigned long int *)(adapter->login_buf))[i]); 3155 } 3156 3157 memset(&crq, 0, sizeof(crq)); 3158 crq.login.first = IBMVNIC_CRQ_CMD; 3159 crq.login.cmd = LOGIN; 3160 crq.login.ioba = cpu_to_be32(buffer_token); 3161 crq.login.len = cpu_to_be32(buffer_size); 3162 ibmvnic_send_crq(adapter, &crq); 3163 3164 return; 3165 3166 buf_rsp_map_failed: 3167 kfree(login_rsp_buffer); 3168 buf_rsp_alloc_failed: 3169 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3170 buf_map_failed: 3171 kfree(login_buffer); 3172 buf_alloc_failed: 3173 return; 3174 } 3175 3176 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3177 u32 len, u8 map_id) 3178 { 3179 union ibmvnic_crq crq; 3180 3181 memset(&crq, 0, sizeof(crq)); 3182 crq.request_map.first = IBMVNIC_CRQ_CMD; 3183 crq.request_map.cmd = REQUEST_MAP; 3184 crq.request_map.map_id = map_id; 3185 crq.request_map.ioba = cpu_to_be32(addr); 3186 crq.request_map.len = cpu_to_be32(len); 3187 ibmvnic_send_crq(adapter, &crq); 3188 } 3189 3190 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3191 { 3192 union ibmvnic_crq crq; 3193 3194 memset(&crq, 0, sizeof(crq)); 3195 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3196 crq.request_unmap.cmd = REQUEST_UNMAP; 3197 crq.request_unmap.map_id = map_id; 3198 ibmvnic_send_crq(adapter, &crq); 3199 } 3200 3201 static void send_map_query(struct ibmvnic_adapter *adapter) 3202 { 3203 union ibmvnic_crq crq; 3204 3205 memset(&crq, 0, sizeof(crq)); 3206 crq.query_map.first = IBMVNIC_CRQ_CMD; 3207 crq.query_map.cmd = QUERY_MAP; 3208 ibmvnic_send_crq(adapter, &crq); 3209 } 3210 3211 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3212 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3213 { 3214 union ibmvnic_crq crq; 3215 3216 atomic_set(&adapter->running_cap_crqs, 0); 3217 memset(&crq, 0, sizeof(crq)); 3218 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3219 crq.query_capability.cmd = QUERY_CAPABILITY; 3220 3221 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3222 atomic_inc(&adapter->running_cap_crqs); 3223 ibmvnic_send_crq(adapter, &crq); 3224 3225 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3226 atomic_inc(&adapter->running_cap_crqs); 3227 ibmvnic_send_crq(adapter, &crq); 3228 3229 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3230 atomic_inc(&adapter->running_cap_crqs); 3231 ibmvnic_send_crq(adapter, &crq); 3232 3233 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3234 atomic_inc(&adapter->running_cap_crqs); 3235 ibmvnic_send_crq(adapter, &crq); 3236 3237 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3238 atomic_inc(&adapter->running_cap_crqs); 3239 ibmvnic_send_crq(adapter, &crq); 3240 3241 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3242 atomic_inc(&adapter->running_cap_crqs); 3243 ibmvnic_send_crq(adapter, &crq); 3244 3245 crq.query_capability.capability = 3246 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3247 atomic_inc(&adapter->running_cap_crqs); 3248 ibmvnic_send_crq(adapter, &crq); 3249 3250 crq.query_capability.capability = 3251 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3252 atomic_inc(&adapter->running_cap_crqs); 3253 ibmvnic_send_crq(adapter, &crq); 3254 3255 crq.query_capability.capability = 3256 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3257 atomic_inc(&adapter->running_cap_crqs); 3258 ibmvnic_send_crq(adapter, &crq); 3259 3260 crq.query_capability.capability = 3261 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3262 atomic_inc(&adapter->running_cap_crqs); 3263 ibmvnic_send_crq(adapter, &crq); 3264 3265 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3266 atomic_inc(&adapter->running_cap_crqs); 3267 ibmvnic_send_crq(adapter, &crq); 3268 3269 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3270 atomic_inc(&adapter->running_cap_crqs); 3271 ibmvnic_send_crq(adapter, &crq); 3272 3273 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3274 atomic_inc(&adapter->running_cap_crqs); 3275 ibmvnic_send_crq(adapter, &crq); 3276 3277 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3278 atomic_inc(&adapter->running_cap_crqs); 3279 ibmvnic_send_crq(adapter, &crq); 3280 3281 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3282 atomic_inc(&adapter->running_cap_crqs); 3283 ibmvnic_send_crq(adapter, &crq); 3284 3285 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3286 atomic_inc(&adapter->running_cap_crqs); 3287 ibmvnic_send_crq(adapter, &crq); 3288 3289 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3290 atomic_inc(&adapter->running_cap_crqs); 3291 ibmvnic_send_crq(adapter, &crq); 3292 3293 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3294 atomic_inc(&adapter->running_cap_crqs); 3295 ibmvnic_send_crq(adapter, &crq); 3296 3297 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3298 atomic_inc(&adapter->running_cap_crqs); 3299 ibmvnic_send_crq(adapter, &crq); 3300 3301 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3302 atomic_inc(&adapter->running_cap_crqs); 3303 ibmvnic_send_crq(adapter, &crq); 3304 3305 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3306 atomic_inc(&adapter->running_cap_crqs); 3307 ibmvnic_send_crq(adapter, &crq); 3308 3309 crq.query_capability.capability = 3310 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3311 atomic_inc(&adapter->running_cap_crqs); 3312 ibmvnic_send_crq(adapter, &crq); 3313 3314 crq.query_capability.capability = 3315 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3316 atomic_inc(&adapter->running_cap_crqs); 3317 ibmvnic_send_crq(adapter, &crq); 3318 3319 crq.query_capability.capability = 3320 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3321 atomic_inc(&adapter->running_cap_crqs); 3322 ibmvnic_send_crq(adapter, &crq); 3323 3324 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3325 atomic_inc(&adapter->running_cap_crqs); 3326 ibmvnic_send_crq(adapter, &crq); 3327 } 3328 3329 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3330 struct ibmvnic_adapter *adapter) 3331 { 3332 struct device *dev = &adapter->vdev->dev; 3333 3334 if (crq->get_vpd_size_rsp.rc.code) { 3335 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3336 crq->get_vpd_size_rsp.rc.code); 3337 complete(&adapter->fw_done); 3338 return; 3339 } 3340 3341 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3342 complete(&adapter->fw_done); 3343 } 3344 3345 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3346 struct ibmvnic_adapter *adapter) 3347 { 3348 struct device *dev = &adapter->vdev->dev; 3349 unsigned char *substr = NULL; 3350 u8 fw_level_len = 0; 3351 3352 memset(adapter->fw_version, 0, 32); 3353 3354 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3355 DMA_FROM_DEVICE); 3356 3357 if (crq->get_vpd_rsp.rc.code) { 3358 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3359 crq->get_vpd_rsp.rc.code); 3360 goto complete; 3361 } 3362 3363 /* get the position of the firmware version info 3364 * located after the ASCII 'RM' substring in the buffer 3365 */ 3366 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3367 if (!substr) { 3368 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3369 goto complete; 3370 } 3371 3372 /* get length of firmware level ASCII substring */ 3373 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3374 fw_level_len = *(substr + 2); 3375 } else { 3376 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3377 goto complete; 3378 } 3379 3380 /* copy firmware version string from vpd into adapter */ 3381 if ((substr + 3 + fw_level_len) < 3382 (adapter->vpd->buff + adapter->vpd->len)) { 3383 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3384 } else { 3385 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3386 } 3387 3388 complete: 3389 if (adapter->fw_version[0] == '\0') 3390 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3391 complete(&adapter->fw_done); 3392 } 3393 3394 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3395 { 3396 struct device *dev = &adapter->vdev->dev; 3397 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3398 union ibmvnic_crq crq; 3399 int i; 3400 3401 dma_unmap_single(dev, adapter->ip_offload_tok, 3402 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3403 3404 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3405 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3406 netdev_dbg(adapter->netdev, "%016lx\n", 3407 ((unsigned long int *)(buf))[i]); 3408 3409 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3410 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3411 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3412 buf->tcp_ipv4_chksum); 3413 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3414 buf->tcp_ipv6_chksum); 3415 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3416 buf->udp_ipv4_chksum); 3417 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3418 buf->udp_ipv6_chksum); 3419 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3420 buf->large_tx_ipv4); 3421 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3422 buf->large_tx_ipv6); 3423 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3424 buf->large_rx_ipv4); 3425 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3426 buf->large_rx_ipv6); 3427 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3428 buf->max_ipv4_header_size); 3429 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3430 buf->max_ipv6_header_size); 3431 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3432 buf->max_tcp_header_size); 3433 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3434 buf->max_udp_header_size); 3435 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3436 buf->max_large_tx_size); 3437 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3438 buf->max_large_rx_size); 3439 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3440 buf->ipv6_extension_header); 3441 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3442 buf->tcp_pseudosum_req); 3443 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3444 buf->num_ipv6_ext_headers); 3445 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3446 buf->off_ipv6_ext_headers); 3447 3448 adapter->ip_offload_ctrl_tok = 3449 dma_map_single(dev, &adapter->ip_offload_ctrl, 3450 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3451 3452 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3453 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3454 return; 3455 } 3456 3457 adapter->ip_offload_ctrl.len = 3458 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3459 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3460 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3461 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3462 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3463 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3464 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3465 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3466 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3467 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3468 3469 /* large_rx disabled for now, additional features needed */ 3470 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3471 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3472 3473 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3474 3475 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3476 adapter->netdev->features |= NETIF_F_IP_CSUM; 3477 3478 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3479 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3480 3481 if ((adapter->netdev->features & 3482 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3483 adapter->netdev->features |= NETIF_F_RXCSUM; 3484 3485 if (buf->large_tx_ipv4) 3486 adapter->netdev->features |= NETIF_F_TSO; 3487 if (buf->large_tx_ipv6) 3488 adapter->netdev->features |= NETIF_F_TSO6; 3489 3490 adapter->netdev->hw_features |= adapter->netdev->features; 3491 3492 memset(&crq, 0, sizeof(crq)); 3493 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3494 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3495 crq.control_ip_offload.len = 3496 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3497 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3498 ibmvnic_send_crq(adapter, &crq); 3499 } 3500 3501 static void handle_error_info_rsp(union ibmvnic_crq *crq, 3502 struct ibmvnic_adapter *adapter) 3503 { 3504 struct device *dev = &adapter->vdev->dev; 3505 struct ibmvnic_error_buff *error_buff, *tmp; 3506 unsigned long flags; 3507 bool found = false; 3508 int i; 3509 3510 if (!crq->request_error_rsp.rc.code) { 3511 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 3512 crq->request_error_rsp.rc.code); 3513 return; 3514 } 3515 3516 spin_lock_irqsave(&adapter->error_list_lock, flags); 3517 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 3518 if (error_buff->error_id == crq->request_error_rsp.error_id) { 3519 found = true; 3520 list_del(&error_buff->list); 3521 break; 3522 } 3523 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3524 3525 if (!found) { 3526 dev_err(dev, "Couldn't find error id %x\n", 3527 be32_to_cpu(crq->request_error_rsp.error_id)); 3528 return; 3529 } 3530 3531 dev_err(dev, "Detailed info for error id %x:", 3532 be32_to_cpu(crq->request_error_rsp.error_id)); 3533 3534 for (i = 0; i < error_buff->len; i++) { 3535 pr_cont("%02x", (int)error_buff->buff[i]); 3536 if (i % 8 == 7) 3537 pr_cont(" "); 3538 } 3539 pr_cont("\n"); 3540 3541 dma_unmap_single(dev, error_buff->dma, error_buff->len, 3542 DMA_FROM_DEVICE); 3543 kfree(error_buff->buff); 3544 kfree(error_buff); 3545 } 3546 3547 static void request_error_information(struct ibmvnic_adapter *adapter, 3548 union ibmvnic_crq *err_crq) 3549 { 3550 struct device *dev = &adapter->vdev->dev; 3551 struct net_device *netdev = adapter->netdev; 3552 struct ibmvnic_error_buff *error_buff; 3553 unsigned long timeout = msecs_to_jiffies(30000); 3554 union ibmvnic_crq crq; 3555 unsigned long flags; 3556 int rc, detail_len; 3557 3558 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 3559 if (!error_buff) 3560 return; 3561 3562 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 3563 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 3564 if (!error_buff->buff) { 3565 kfree(error_buff); 3566 return; 3567 } 3568 3569 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 3570 DMA_FROM_DEVICE); 3571 if (dma_mapping_error(dev, error_buff->dma)) { 3572 netdev_err(netdev, "Couldn't map error buffer\n"); 3573 kfree(error_buff->buff); 3574 kfree(error_buff); 3575 return; 3576 } 3577 3578 error_buff->len = detail_len; 3579 error_buff->error_id = err_crq->error_indication.error_id; 3580 3581 spin_lock_irqsave(&adapter->error_list_lock, flags); 3582 list_add_tail(&error_buff->list, &adapter->errors); 3583 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3584 3585 memset(&crq, 0, sizeof(crq)); 3586 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 3587 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 3588 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 3589 crq.request_error_info.len = cpu_to_be32(detail_len); 3590 crq.request_error_info.error_id = err_crq->error_indication.error_id; 3591 3592 rc = ibmvnic_send_crq(adapter, &crq); 3593 if (rc) { 3594 netdev_err(netdev, "failed to request error information\n"); 3595 goto err_info_fail; 3596 } 3597 3598 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3599 netdev_err(netdev, "timeout waiting for error information\n"); 3600 goto err_info_fail; 3601 } 3602 3603 return; 3604 3605 err_info_fail: 3606 spin_lock_irqsave(&adapter->error_list_lock, flags); 3607 list_del(&error_buff->list); 3608 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3609 3610 kfree(error_buff->buff); 3611 kfree(error_buff); 3612 } 3613 3614 static void handle_error_indication(union ibmvnic_crq *crq, 3615 struct ibmvnic_adapter *adapter) 3616 { 3617 struct device *dev = &adapter->vdev->dev; 3618 3619 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 3620 crq->error_indication.flags 3621 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3622 be32_to_cpu(crq->error_indication.error_id), 3623 be16_to_cpu(crq->error_indication.error_cause)); 3624 3625 if (be32_to_cpu(crq->error_indication.error_id)) 3626 request_error_information(adapter, crq); 3627 3628 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3629 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3630 else 3631 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3632 } 3633 3634 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3635 struct ibmvnic_adapter *adapter) 3636 { 3637 struct net_device *netdev = adapter->netdev; 3638 struct device *dev = &adapter->vdev->dev; 3639 long rc; 3640 3641 rc = crq->change_mac_addr_rsp.rc.code; 3642 if (rc) { 3643 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3644 goto out; 3645 } 3646 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3647 ETH_ALEN); 3648 out: 3649 complete(&adapter->fw_done); 3650 return rc; 3651 } 3652 3653 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3654 struct ibmvnic_adapter *adapter) 3655 { 3656 struct device *dev = &adapter->vdev->dev; 3657 u64 *req_value; 3658 char *name; 3659 3660 atomic_dec(&adapter->running_cap_crqs); 3661 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3662 case REQ_TX_QUEUES: 3663 req_value = &adapter->req_tx_queues; 3664 name = "tx"; 3665 break; 3666 case REQ_RX_QUEUES: 3667 req_value = &adapter->req_rx_queues; 3668 name = "rx"; 3669 break; 3670 case REQ_RX_ADD_QUEUES: 3671 req_value = &adapter->req_rx_add_queues; 3672 name = "rx_add"; 3673 break; 3674 case REQ_TX_ENTRIES_PER_SUBCRQ: 3675 req_value = &adapter->req_tx_entries_per_subcrq; 3676 name = "tx_entries_per_subcrq"; 3677 break; 3678 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3679 req_value = &adapter->req_rx_add_entries_per_subcrq; 3680 name = "rx_add_entries_per_subcrq"; 3681 break; 3682 case REQ_MTU: 3683 req_value = &adapter->req_mtu; 3684 name = "mtu"; 3685 break; 3686 case PROMISC_REQUESTED: 3687 req_value = &adapter->promisc; 3688 name = "promisc"; 3689 break; 3690 default: 3691 dev_err(dev, "Got invalid cap request rsp %d\n", 3692 crq->request_capability.capability); 3693 return; 3694 } 3695 3696 switch (crq->request_capability_rsp.rc.code) { 3697 case SUCCESS: 3698 break; 3699 case PARTIALSUCCESS: 3700 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3701 *req_value, 3702 (long int)be64_to_cpu(crq->request_capability_rsp. 3703 number), name); 3704 3705 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3706 REQ_MTU) { 3707 pr_err("mtu of %llu is not supported. Reverting.\n", 3708 *req_value); 3709 *req_value = adapter->fallback.mtu; 3710 } else { 3711 *req_value = 3712 be64_to_cpu(crq->request_capability_rsp.number); 3713 } 3714 3715 ibmvnic_send_req_caps(adapter, 1); 3716 return; 3717 default: 3718 dev_err(dev, "Error %d in request cap rsp\n", 3719 crq->request_capability_rsp.rc.code); 3720 return; 3721 } 3722 3723 /* Done receiving requested capabilities, query IP offload support */ 3724 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3725 union ibmvnic_crq newcrq; 3726 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3727 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3728 &adapter->ip_offload_buf; 3729 3730 adapter->wait_capability = false; 3731 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3732 buf_sz, 3733 DMA_FROM_DEVICE); 3734 3735 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3736 if (!firmware_has_feature(FW_FEATURE_CMO)) 3737 dev_err(dev, "Couldn't map offload buffer\n"); 3738 return; 3739 } 3740 3741 memset(&newcrq, 0, sizeof(newcrq)); 3742 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3743 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3744 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3745 newcrq.query_ip_offload.ioba = 3746 cpu_to_be32(adapter->ip_offload_tok); 3747 3748 ibmvnic_send_crq(adapter, &newcrq); 3749 } 3750 } 3751 3752 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3753 struct ibmvnic_adapter *adapter) 3754 { 3755 struct device *dev = &adapter->vdev->dev; 3756 struct net_device *netdev = adapter->netdev; 3757 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3758 struct ibmvnic_login_buffer *login = adapter->login_buf; 3759 int i; 3760 3761 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3762 DMA_BIDIRECTIONAL); 3763 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3764 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3765 3766 /* If the number of queues requested can't be allocated by the 3767 * server, the login response will return with code 1. We will need 3768 * to resend the login buffer with fewer queues requested. 3769 */ 3770 if (login_rsp_crq->generic.rc.code) { 3771 adapter->renegotiate = true; 3772 complete(&adapter->init_done); 3773 return 0; 3774 } 3775 3776 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3777 3778 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3779 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3780 netdev_dbg(adapter->netdev, "%016lx\n", 3781 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3782 } 3783 3784 /* Sanity checks */ 3785 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3786 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3787 adapter->req_rx_add_queues != 3788 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3789 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3790 ibmvnic_remove(adapter->vdev); 3791 return -EIO; 3792 } 3793 release_login_buffer(adapter); 3794 complete(&adapter->init_done); 3795 3796 return 0; 3797 } 3798 3799 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3800 struct ibmvnic_adapter *adapter) 3801 { 3802 struct device *dev = &adapter->vdev->dev; 3803 long rc; 3804 3805 rc = crq->request_unmap_rsp.rc.code; 3806 if (rc) 3807 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3808 } 3809 3810 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3811 struct ibmvnic_adapter *adapter) 3812 { 3813 struct net_device *netdev = adapter->netdev; 3814 struct device *dev = &adapter->vdev->dev; 3815 long rc; 3816 3817 rc = crq->query_map_rsp.rc.code; 3818 if (rc) { 3819 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3820 return; 3821 } 3822 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3823 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3824 crq->query_map_rsp.free_pages); 3825 } 3826 3827 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3828 struct ibmvnic_adapter *adapter) 3829 { 3830 struct net_device *netdev = adapter->netdev; 3831 struct device *dev = &adapter->vdev->dev; 3832 long rc; 3833 3834 atomic_dec(&adapter->running_cap_crqs); 3835 netdev_dbg(netdev, "Outstanding queries: %d\n", 3836 atomic_read(&adapter->running_cap_crqs)); 3837 rc = crq->query_capability.rc.code; 3838 if (rc) { 3839 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3840 goto out; 3841 } 3842 3843 switch (be16_to_cpu(crq->query_capability.capability)) { 3844 case MIN_TX_QUEUES: 3845 adapter->min_tx_queues = 3846 be64_to_cpu(crq->query_capability.number); 3847 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3848 adapter->min_tx_queues); 3849 break; 3850 case MIN_RX_QUEUES: 3851 adapter->min_rx_queues = 3852 be64_to_cpu(crq->query_capability.number); 3853 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3854 adapter->min_rx_queues); 3855 break; 3856 case MIN_RX_ADD_QUEUES: 3857 adapter->min_rx_add_queues = 3858 be64_to_cpu(crq->query_capability.number); 3859 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3860 adapter->min_rx_add_queues); 3861 break; 3862 case MAX_TX_QUEUES: 3863 adapter->max_tx_queues = 3864 be64_to_cpu(crq->query_capability.number); 3865 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3866 adapter->max_tx_queues); 3867 break; 3868 case MAX_RX_QUEUES: 3869 adapter->max_rx_queues = 3870 be64_to_cpu(crq->query_capability.number); 3871 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3872 adapter->max_rx_queues); 3873 break; 3874 case MAX_RX_ADD_QUEUES: 3875 adapter->max_rx_add_queues = 3876 be64_to_cpu(crq->query_capability.number); 3877 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3878 adapter->max_rx_add_queues); 3879 break; 3880 case MIN_TX_ENTRIES_PER_SUBCRQ: 3881 adapter->min_tx_entries_per_subcrq = 3882 be64_to_cpu(crq->query_capability.number); 3883 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3884 adapter->min_tx_entries_per_subcrq); 3885 break; 3886 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3887 adapter->min_rx_add_entries_per_subcrq = 3888 be64_to_cpu(crq->query_capability.number); 3889 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3890 adapter->min_rx_add_entries_per_subcrq); 3891 break; 3892 case MAX_TX_ENTRIES_PER_SUBCRQ: 3893 adapter->max_tx_entries_per_subcrq = 3894 be64_to_cpu(crq->query_capability.number); 3895 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3896 adapter->max_tx_entries_per_subcrq); 3897 break; 3898 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3899 adapter->max_rx_add_entries_per_subcrq = 3900 be64_to_cpu(crq->query_capability.number); 3901 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3902 adapter->max_rx_add_entries_per_subcrq); 3903 break; 3904 case TCP_IP_OFFLOAD: 3905 adapter->tcp_ip_offload = 3906 be64_to_cpu(crq->query_capability.number); 3907 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3908 adapter->tcp_ip_offload); 3909 break; 3910 case PROMISC_SUPPORTED: 3911 adapter->promisc_supported = 3912 be64_to_cpu(crq->query_capability.number); 3913 netdev_dbg(netdev, "promisc_supported = %lld\n", 3914 adapter->promisc_supported); 3915 break; 3916 case MIN_MTU: 3917 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3918 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3919 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3920 break; 3921 case MAX_MTU: 3922 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3923 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3924 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3925 break; 3926 case MAX_MULTICAST_FILTERS: 3927 adapter->max_multicast_filters = 3928 be64_to_cpu(crq->query_capability.number); 3929 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3930 adapter->max_multicast_filters); 3931 break; 3932 case VLAN_HEADER_INSERTION: 3933 adapter->vlan_header_insertion = 3934 be64_to_cpu(crq->query_capability.number); 3935 if (adapter->vlan_header_insertion) 3936 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3937 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3938 adapter->vlan_header_insertion); 3939 break; 3940 case RX_VLAN_HEADER_INSERTION: 3941 adapter->rx_vlan_header_insertion = 3942 be64_to_cpu(crq->query_capability.number); 3943 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3944 adapter->rx_vlan_header_insertion); 3945 break; 3946 case MAX_TX_SG_ENTRIES: 3947 adapter->max_tx_sg_entries = 3948 be64_to_cpu(crq->query_capability.number); 3949 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3950 adapter->max_tx_sg_entries); 3951 break; 3952 case RX_SG_SUPPORTED: 3953 adapter->rx_sg_supported = 3954 be64_to_cpu(crq->query_capability.number); 3955 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3956 adapter->rx_sg_supported); 3957 break; 3958 case OPT_TX_COMP_SUB_QUEUES: 3959 adapter->opt_tx_comp_sub_queues = 3960 be64_to_cpu(crq->query_capability.number); 3961 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3962 adapter->opt_tx_comp_sub_queues); 3963 break; 3964 case OPT_RX_COMP_QUEUES: 3965 adapter->opt_rx_comp_queues = 3966 be64_to_cpu(crq->query_capability.number); 3967 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3968 adapter->opt_rx_comp_queues); 3969 break; 3970 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3971 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3972 be64_to_cpu(crq->query_capability.number); 3973 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3974 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3975 break; 3976 case OPT_TX_ENTRIES_PER_SUBCRQ: 3977 adapter->opt_tx_entries_per_subcrq = 3978 be64_to_cpu(crq->query_capability.number); 3979 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3980 adapter->opt_tx_entries_per_subcrq); 3981 break; 3982 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3983 adapter->opt_rxba_entries_per_subcrq = 3984 be64_to_cpu(crq->query_capability.number); 3985 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3986 adapter->opt_rxba_entries_per_subcrq); 3987 break; 3988 case TX_RX_DESC_REQ: 3989 adapter->tx_rx_desc_req = crq->query_capability.number; 3990 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3991 adapter->tx_rx_desc_req); 3992 break; 3993 3994 default: 3995 netdev_err(netdev, "Got invalid cap rsp %d\n", 3996 crq->query_capability.capability); 3997 } 3998 3999 out: 4000 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4001 adapter->wait_capability = false; 4002 ibmvnic_send_req_caps(adapter, 0); 4003 } 4004 } 4005 4006 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4007 struct ibmvnic_adapter *adapter) 4008 { 4009 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4010 struct net_device *netdev = adapter->netdev; 4011 struct device *dev = &adapter->vdev->dev; 4012 u64 *u64_crq = (u64 *)crq; 4013 long rc; 4014 4015 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4016 (unsigned long int)cpu_to_be64(u64_crq[0]), 4017 (unsigned long int)cpu_to_be64(u64_crq[1])); 4018 switch (gen_crq->first) { 4019 case IBMVNIC_CRQ_INIT_RSP: 4020 switch (gen_crq->cmd) { 4021 case IBMVNIC_CRQ_INIT: 4022 dev_info(dev, "Partner initialized\n"); 4023 adapter->from_passive_init = true; 4024 complete(&adapter->init_done); 4025 break; 4026 case IBMVNIC_CRQ_INIT_COMPLETE: 4027 dev_info(dev, "Partner initialization complete\n"); 4028 send_version_xchg(adapter); 4029 break; 4030 default: 4031 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4032 } 4033 return; 4034 case IBMVNIC_CRQ_XPORT_EVENT: 4035 netif_carrier_off(netdev); 4036 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4037 dev_info(dev, "Migrated, re-enabling adapter\n"); 4038 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4039 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4040 dev_info(dev, "Backing device failover detected\n"); 4041 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4042 } else { 4043 /* The adapter lost the connection */ 4044 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4045 gen_crq->cmd); 4046 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4047 } 4048 return; 4049 case IBMVNIC_CRQ_CMD_RSP: 4050 break; 4051 default: 4052 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4053 gen_crq->first); 4054 return; 4055 } 4056 4057 switch (gen_crq->cmd) { 4058 case VERSION_EXCHANGE_RSP: 4059 rc = crq->version_exchange_rsp.rc.code; 4060 if (rc) { 4061 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4062 break; 4063 } 4064 dev_info(dev, "Partner protocol version is %d\n", 4065 crq->version_exchange_rsp.version); 4066 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4067 ibmvnic_version) 4068 ibmvnic_version = 4069 be16_to_cpu(crq->version_exchange_rsp.version); 4070 send_cap_queries(adapter); 4071 break; 4072 case QUERY_CAPABILITY_RSP: 4073 handle_query_cap_rsp(crq, adapter); 4074 break; 4075 case QUERY_MAP_RSP: 4076 handle_query_map_rsp(crq, adapter); 4077 break; 4078 case REQUEST_MAP_RSP: 4079 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4080 complete(&adapter->fw_done); 4081 break; 4082 case REQUEST_UNMAP_RSP: 4083 handle_request_unmap_rsp(crq, adapter); 4084 break; 4085 case REQUEST_CAPABILITY_RSP: 4086 handle_request_cap_rsp(crq, adapter); 4087 break; 4088 case LOGIN_RSP: 4089 netdev_dbg(netdev, "Got Login Response\n"); 4090 handle_login_rsp(crq, adapter); 4091 break; 4092 case LOGICAL_LINK_STATE_RSP: 4093 netdev_dbg(netdev, 4094 "Got Logical Link State Response, state: %d rc: %d\n", 4095 crq->logical_link_state_rsp.link_state, 4096 crq->logical_link_state_rsp.rc.code); 4097 adapter->logical_link_state = 4098 crq->logical_link_state_rsp.link_state; 4099 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4100 complete(&adapter->init_done); 4101 break; 4102 case LINK_STATE_INDICATION: 4103 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4104 adapter->phys_link_state = 4105 crq->link_state_indication.phys_link_state; 4106 adapter->logical_link_state = 4107 crq->link_state_indication.logical_link_state; 4108 break; 4109 case CHANGE_MAC_ADDR_RSP: 4110 netdev_dbg(netdev, "Got MAC address change Response\n"); 4111 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4112 break; 4113 case ERROR_INDICATION: 4114 netdev_dbg(netdev, "Got Error Indication\n"); 4115 handle_error_indication(crq, adapter); 4116 break; 4117 case REQUEST_ERROR_RSP: 4118 netdev_dbg(netdev, "Got Error Detail Response\n"); 4119 handle_error_info_rsp(crq, adapter); 4120 break; 4121 case REQUEST_STATISTICS_RSP: 4122 netdev_dbg(netdev, "Got Statistics Response\n"); 4123 complete(&adapter->stats_done); 4124 break; 4125 case QUERY_IP_OFFLOAD_RSP: 4126 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4127 handle_query_ip_offload_rsp(adapter); 4128 break; 4129 case MULTICAST_CTRL_RSP: 4130 netdev_dbg(netdev, "Got multicast control Response\n"); 4131 break; 4132 case CONTROL_IP_OFFLOAD_RSP: 4133 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4134 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4135 sizeof(adapter->ip_offload_ctrl), 4136 DMA_TO_DEVICE); 4137 complete(&adapter->init_done); 4138 break; 4139 case COLLECT_FW_TRACE_RSP: 4140 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4141 complete(&adapter->fw_done); 4142 break; 4143 case GET_VPD_SIZE_RSP: 4144 handle_vpd_size_rsp(crq, adapter); 4145 break; 4146 case GET_VPD_RSP: 4147 handle_vpd_rsp(crq, adapter); 4148 break; 4149 default: 4150 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4151 gen_crq->cmd); 4152 } 4153 } 4154 4155 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4156 { 4157 struct ibmvnic_adapter *adapter = instance; 4158 4159 tasklet_schedule(&adapter->tasklet); 4160 return IRQ_HANDLED; 4161 } 4162 4163 static void ibmvnic_tasklet(void *data) 4164 { 4165 struct ibmvnic_adapter *adapter = data; 4166 struct ibmvnic_crq_queue *queue = &adapter->crq; 4167 union ibmvnic_crq *crq; 4168 unsigned long flags; 4169 bool done = false; 4170 4171 spin_lock_irqsave(&queue->lock, flags); 4172 while (!done) { 4173 /* Pull all the valid messages off the CRQ */ 4174 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4175 ibmvnic_handle_crq(crq, adapter); 4176 crq->generic.first = 0; 4177 } 4178 4179 /* remain in tasklet until all 4180 * capabilities responses are received 4181 */ 4182 if (!adapter->wait_capability) 4183 done = true; 4184 } 4185 /* if capabilities CRQ's were sent in this tasklet, the following 4186 * tasklet must wait until all responses are received 4187 */ 4188 if (atomic_read(&adapter->running_cap_crqs) != 0) 4189 adapter->wait_capability = true; 4190 spin_unlock_irqrestore(&queue->lock, flags); 4191 } 4192 4193 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4194 { 4195 struct vio_dev *vdev = adapter->vdev; 4196 int rc; 4197 4198 do { 4199 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4200 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4201 4202 if (rc) 4203 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4204 4205 return rc; 4206 } 4207 4208 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4209 { 4210 struct ibmvnic_crq_queue *crq = &adapter->crq; 4211 struct device *dev = &adapter->vdev->dev; 4212 struct vio_dev *vdev = adapter->vdev; 4213 int rc; 4214 4215 /* Close the CRQ */ 4216 do { 4217 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4218 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4219 4220 /* Clean out the queue */ 4221 memset(crq->msgs, 0, PAGE_SIZE); 4222 crq->cur = 0; 4223 4224 /* And re-open it again */ 4225 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4226 crq->msg_token, PAGE_SIZE); 4227 4228 if (rc == H_CLOSED) 4229 /* Adapter is good, but other end is not ready */ 4230 dev_warn(dev, "Partner adapter not ready\n"); 4231 else if (rc != 0) 4232 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4233 4234 return rc; 4235 } 4236 4237 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4238 { 4239 struct ibmvnic_crq_queue *crq = &adapter->crq; 4240 struct vio_dev *vdev = adapter->vdev; 4241 long rc; 4242 4243 if (!crq->msgs) 4244 return; 4245 4246 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4247 free_irq(vdev->irq, adapter); 4248 tasklet_kill(&adapter->tasklet); 4249 do { 4250 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4251 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4252 4253 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4254 DMA_BIDIRECTIONAL); 4255 free_page((unsigned long)crq->msgs); 4256 crq->msgs = NULL; 4257 } 4258 4259 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4260 { 4261 struct ibmvnic_crq_queue *crq = &adapter->crq; 4262 struct device *dev = &adapter->vdev->dev; 4263 struct vio_dev *vdev = adapter->vdev; 4264 int rc, retrc = -ENOMEM; 4265 4266 if (crq->msgs) 4267 return 0; 4268 4269 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4270 /* Should we allocate more than one page? */ 4271 4272 if (!crq->msgs) 4273 return -ENOMEM; 4274 4275 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4276 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4277 DMA_BIDIRECTIONAL); 4278 if (dma_mapping_error(dev, crq->msg_token)) 4279 goto map_failed; 4280 4281 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4282 crq->msg_token, PAGE_SIZE); 4283 4284 if (rc == H_RESOURCE) 4285 /* maybe kexecing and resource is busy. try a reset */ 4286 rc = ibmvnic_reset_crq(adapter); 4287 retrc = rc; 4288 4289 if (rc == H_CLOSED) { 4290 dev_warn(dev, "Partner adapter not ready\n"); 4291 } else if (rc) { 4292 dev_warn(dev, "Error %d opening adapter\n", rc); 4293 goto reg_crq_failed; 4294 } 4295 4296 retrc = 0; 4297 4298 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4299 (unsigned long)adapter); 4300 4301 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4302 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4303 adapter); 4304 if (rc) { 4305 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4306 vdev->irq, rc); 4307 goto req_irq_failed; 4308 } 4309 4310 rc = vio_enable_interrupts(vdev); 4311 if (rc) { 4312 dev_err(dev, "Error %d enabling interrupts\n", rc); 4313 goto req_irq_failed; 4314 } 4315 4316 crq->cur = 0; 4317 spin_lock_init(&crq->lock); 4318 4319 return retrc; 4320 4321 req_irq_failed: 4322 tasklet_kill(&adapter->tasklet); 4323 do { 4324 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4325 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4326 reg_crq_failed: 4327 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4328 map_failed: 4329 free_page((unsigned long)crq->msgs); 4330 crq->msgs = NULL; 4331 return retrc; 4332 } 4333 4334 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4335 { 4336 struct device *dev = &adapter->vdev->dev; 4337 unsigned long timeout = msecs_to_jiffies(30000); 4338 int rc; 4339 4340 if (adapter->resetting && !adapter->wait_for_reset) { 4341 rc = ibmvnic_reset_crq(adapter); 4342 if (!rc) 4343 rc = vio_enable_interrupts(adapter->vdev); 4344 } else { 4345 rc = init_crq_queue(adapter); 4346 } 4347 4348 if (rc) { 4349 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4350 return rc; 4351 } 4352 4353 adapter->from_passive_init = false; 4354 4355 init_completion(&adapter->init_done); 4356 adapter->init_done_rc = 0; 4357 ibmvnic_send_crq_init(adapter); 4358 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4359 dev_err(dev, "Initialization sequence timed out\n"); 4360 return -1; 4361 } 4362 4363 if (adapter->init_done_rc) { 4364 release_crq_queue(adapter); 4365 return adapter->init_done_rc; 4366 } 4367 4368 if (adapter->from_passive_init) { 4369 adapter->state = VNIC_OPEN; 4370 adapter->from_passive_init = false; 4371 return -1; 4372 } 4373 4374 if (adapter->resetting && !adapter->wait_for_reset) 4375 rc = reset_sub_crq_queues(adapter); 4376 else 4377 rc = init_sub_crqs(adapter); 4378 if (rc) { 4379 dev_err(dev, "Initialization of sub crqs failed\n"); 4380 release_crq_queue(adapter); 4381 return rc; 4382 } 4383 4384 rc = init_sub_crq_irqs(adapter); 4385 if (rc) { 4386 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4387 release_crq_queue(adapter); 4388 } 4389 4390 return rc; 4391 } 4392 4393 static struct device_attribute dev_attr_failover; 4394 4395 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4396 { 4397 struct ibmvnic_adapter *adapter; 4398 struct net_device *netdev; 4399 unsigned char *mac_addr_p; 4400 int rc; 4401 4402 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4403 dev->unit_address); 4404 4405 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4406 VETH_MAC_ADDR, NULL); 4407 if (!mac_addr_p) { 4408 dev_err(&dev->dev, 4409 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4410 __FILE__, __LINE__); 4411 return 0; 4412 } 4413 4414 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4415 IBMVNIC_MAX_QUEUES); 4416 if (!netdev) 4417 return -ENOMEM; 4418 4419 adapter = netdev_priv(netdev); 4420 adapter->state = VNIC_PROBING; 4421 dev_set_drvdata(&dev->dev, netdev); 4422 adapter->vdev = dev; 4423 adapter->netdev = netdev; 4424 4425 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4426 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4427 netdev->irq = dev->irq; 4428 netdev->netdev_ops = &ibmvnic_netdev_ops; 4429 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4430 SET_NETDEV_DEV(netdev, &dev->dev); 4431 4432 spin_lock_init(&adapter->stats_lock); 4433 4434 INIT_LIST_HEAD(&adapter->errors); 4435 spin_lock_init(&adapter->error_list_lock); 4436 4437 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4438 INIT_LIST_HEAD(&adapter->rwi_list); 4439 mutex_init(&adapter->reset_lock); 4440 mutex_init(&adapter->rwi_lock); 4441 adapter->resetting = false; 4442 4443 adapter->mac_change_pending = false; 4444 4445 do { 4446 rc = ibmvnic_init(adapter); 4447 if (rc && rc != EAGAIN) 4448 goto ibmvnic_init_fail; 4449 } while (rc == EAGAIN); 4450 4451 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4452 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4453 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4454 4455 rc = device_create_file(&dev->dev, &dev_attr_failover); 4456 if (rc) 4457 goto ibmvnic_init_fail; 4458 4459 netif_carrier_off(netdev); 4460 rc = register_netdev(netdev); 4461 if (rc) { 4462 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4463 goto ibmvnic_register_fail; 4464 } 4465 dev_info(&dev->dev, "ibmvnic registered\n"); 4466 4467 adapter->state = VNIC_PROBED; 4468 4469 adapter->wait_for_reset = false; 4470 4471 return 0; 4472 4473 ibmvnic_register_fail: 4474 device_remove_file(&dev->dev, &dev_attr_failover); 4475 4476 ibmvnic_init_fail: 4477 release_sub_crqs(adapter); 4478 release_crq_queue(adapter); 4479 free_netdev(netdev); 4480 4481 return rc; 4482 } 4483 4484 static int ibmvnic_remove(struct vio_dev *dev) 4485 { 4486 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4487 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4488 4489 adapter->state = VNIC_REMOVING; 4490 unregister_netdev(netdev); 4491 mutex_lock(&adapter->reset_lock); 4492 4493 release_resources(adapter); 4494 release_sub_crqs(adapter); 4495 release_crq_queue(adapter); 4496 4497 adapter->state = VNIC_REMOVED; 4498 4499 mutex_unlock(&adapter->reset_lock); 4500 device_remove_file(&dev->dev, &dev_attr_failover); 4501 free_netdev(netdev); 4502 dev_set_drvdata(&dev->dev, NULL); 4503 4504 return 0; 4505 } 4506 4507 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4508 const char *buf, size_t count) 4509 { 4510 struct net_device *netdev = dev_get_drvdata(dev); 4511 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4512 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4513 __be64 session_token; 4514 long rc; 4515 4516 if (!sysfs_streq(buf, "1")) 4517 return -EINVAL; 4518 4519 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4520 H_GET_SESSION_TOKEN, 0, 0, 0); 4521 if (rc) { 4522 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4523 rc); 4524 return -EINVAL; 4525 } 4526 4527 session_token = (__be64)retbuf[0]; 4528 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4529 be64_to_cpu(session_token)); 4530 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4531 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4532 if (rc) { 4533 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4534 rc); 4535 return -EINVAL; 4536 } 4537 4538 return count; 4539 } 4540 4541 static DEVICE_ATTR_WO(failover); 4542 4543 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4544 { 4545 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4546 struct ibmvnic_adapter *adapter; 4547 struct iommu_table *tbl; 4548 unsigned long ret = 0; 4549 int i; 4550 4551 tbl = get_iommu_table_base(&vdev->dev); 4552 4553 /* netdev inits at probe time along with the structures we need below*/ 4554 if (!netdev) 4555 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4556 4557 adapter = netdev_priv(netdev); 4558 4559 ret += PAGE_SIZE; /* the crq message queue */ 4560 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4561 4562 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4563 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4564 4565 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4566 i++) 4567 ret += adapter->rx_pool[i].size * 4568 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4569 4570 return ret; 4571 } 4572 4573 static int ibmvnic_resume(struct device *dev) 4574 { 4575 struct net_device *netdev = dev_get_drvdata(dev); 4576 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4577 4578 if (adapter->state != VNIC_OPEN) 4579 return 0; 4580 4581 tasklet_schedule(&adapter->tasklet); 4582 4583 return 0; 4584 } 4585 4586 static const struct vio_device_id ibmvnic_device_table[] = { 4587 {"network", "IBM,vnic"}, 4588 {"", "" } 4589 }; 4590 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4591 4592 static const struct dev_pm_ops ibmvnic_pm_ops = { 4593 .resume = ibmvnic_resume 4594 }; 4595 4596 static struct vio_driver ibmvnic_driver = { 4597 .id_table = ibmvnic_device_table, 4598 .probe = ibmvnic_probe, 4599 .remove = ibmvnic_remove, 4600 .get_desired_dma = ibmvnic_get_desired_dma, 4601 .name = ibmvnic_driver_name, 4602 .pm = &ibmvnic_pm_ops, 4603 }; 4604 4605 /* module functions */ 4606 static int __init ibmvnic_module_init(void) 4607 { 4608 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4609 IBMVNIC_DRIVER_VERSION); 4610 4611 return vio_register_driver(&ibmvnic_driver); 4612 } 4613 4614 static void __exit ibmvnic_module_exit(void) 4615 { 4616 vio_unregister_driver(&ibmvnic_driver); 4617 } 4618 4619 module_init(ibmvnic_module_init); 4620 module_exit(ibmvnic_module_exit); 4621