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 *, bool); 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(IBMVNIC_MAX_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(IBMVNIC_MAX_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 = rxadd_subcrqs; 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 return 0; 558 } 559 560 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 561 { 562 struct ibmvnic_tx_pool *tx_pool; 563 int tx_scrqs; 564 int i, j, rc; 565 566 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 567 for (i = 0; i < tx_scrqs; i++) { 568 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i); 569 570 tx_pool = &adapter->tx_pool[i]; 571 572 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 573 if (rc) 574 return rc; 575 576 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb); 577 if (rc) 578 return rc; 579 580 memset(tx_pool->tx_buff, 0, 581 adapter->req_tx_entries_per_subcrq * 582 sizeof(struct ibmvnic_tx_buff)); 583 584 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 585 tx_pool->free_map[j] = j; 586 587 tx_pool->consumer_index = 0; 588 tx_pool->producer_index = 0; 589 tx_pool->tso_index = 0; 590 } 591 592 return 0; 593 } 594 595 static void release_vpd_data(struct ibmvnic_adapter *adapter) 596 { 597 if (!adapter->vpd) 598 return; 599 600 kfree(adapter->vpd->buff); 601 kfree(adapter->vpd); 602 603 adapter->vpd = NULL; 604 } 605 606 static void release_tx_pools(struct ibmvnic_adapter *adapter) 607 { 608 struct ibmvnic_tx_pool *tx_pool; 609 int i; 610 611 if (!adapter->tx_pool) 612 return; 613 614 for (i = 0; i < adapter->num_active_tx_pools; i++) { 615 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i); 616 tx_pool = &adapter->tx_pool[i]; 617 kfree(tx_pool->tx_buff); 618 free_long_term_buff(adapter, &tx_pool->long_term_buff); 619 free_long_term_buff(adapter, &tx_pool->tso_ltb); 620 kfree(tx_pool->free_map); 621 } 622 623 kfree(adapter->tx_pool); 624 adapter->tx_pool = NULL; 625 adapter->num_active_tx_pools = 0; 626 } 627 628 static int init_tx_pools(struct net_device *netdev) 629 { 630 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 631 struct device *dev = &adapter->vdev->dev; 632 struct ibmvnic_tx_pool *tx_pool; 633 int tx_subcrqs; 634 int i, j; 635 636 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 637 adapter->tx_pool = kcalloc(tx_subcrqs, 638 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 639 if (!adapter->tx_pool) 640 return -1; 641 642 adapter->num_active_tx_pools = tx_subcrqs; 643 644 for (i = 0; i < tx_subcrqs; i++) { 645 tx_pool = &adapter->tx_pool[i]; 646 647 netdev_dbg(adapter->netdev, 648 "Initializing tx_pool[%d], %lld buffs\n", 649 i, adapter->req_tx_entries_per_subcrq); 650 651 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 652 sizeof(struct ibmvnic_tx_buff), 653 GFP_KERNEL); 654 if (!tx_pool->tx_buff) { 655 dev_err(dev, "tx pool buffer allocation failed\n"); 656 release_tx_pools(adapter); 657 return -1; 658 } 659 660 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 661 adapter->req_tx_entries_per_subcrq * 662 adapter->req_mtu)) { 663 release_tx_pools(adapter); 664 return -1; 665 } 666 667 /* alloc TSO ltb */ 668 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb, 669 IBMVNIC_TSO_BUFS * 670 IBMVNIC_TSO_BUF_SZ)) { 671 release_tx_pools(adapter); 672 return -1; 673 } 674 675 tx_pool->tso_index = 0; 676 677 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 678 sizeof(int), GFP_KERNEL); 679 if (!tx_pool->free_map) { 680 release_tx_pools(adapter); 681 return -1; 682 } 683 684 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 685 tx_pool->free_map[j] = j; 686 687 tx_pool->consumer_index = 0; 688 tx_pool->producer_index = 0; 689 } 690 691 return 0; 692 } 693 694 static void release_error_buffers(struct ibmvnic_adapter *adapter) 695 { 696 struct device *dev = &adapter->vdev->dev; 697 struct ibmvnic_error_buff *error_buff, *tmp; 698 unsigned long flags; 699 700 spin_lock_irqsave(&adapter->error_list_lock, flags); 701 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 702 list_del(&error_buff->list); 703 dma_unmap_single(dev, error_buff->dma, error_buff->len, 704 DMA_FROM_DEVICE); 705 kfree(error_buff->buff); 706 kfree(error_buff); 707 } 708 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 709 } 710 711 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 712 { 713 int i; 714 715 if (adapter->napi_enabled) 716 return; 717 718 for (i = 0; i < adapter->req_rx_queues; i++) 719 napi_enable(&adapter->napi[i]); 720 721 adapter->napi_enabled = true; 722 } 723 724 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 725 { 726 int i; 727 728 if (!adapter->napi_enabled) 729 return; 730 731 for (i = 0; i < adapter->req_rx_queues; i++) { 732 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 733 napi_disable(&adapter->napi[i]); 734 } 735 736 adapter->napi_enabled = false; 737 } 738 739 static int init_napi(struct ibmvnic_adapter *adapter) 740 { 741 int i; 742 743 adapter->napi = kcalloc(adapter->req_rx_queues, 744 sizeof(struct napi_struct), GFP_KERNEL); 745 if (!adapter->napi) 746 return -ENOMEM; 747 748 for (i = 0; i < adapter->req_rx_queues; i++) { 749 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 750 netif_napi_add(adapter->netdev, &adapter->napi[i], 751 ibmvnic_poll, NAPI_POLL_WEIGHT); 752 } 753 754 adapter->num_active_rx_napi = adapter->req_rx_queues; 755 return 0; 756 } 757 758 static void release_napi(struct ibmvnic_adapter *adapter) 759 { 760 int i; 761 762 if (!adapter->napi) 763 return; 764 765 for (i = 0; i < adapter->num_active_rx_napi; i++) { 766 if (&adapter->napi[i]) { 767 netdev_dbg(adapter->netdev, 768 "Releasing napi[%d]\n", i); 769 netif_napi_del(&adapter->napi[i]); 770 } 771 } 772 773 kfree(adapter->napi); 774 adapter->napi = NULL; 775 adapter->num_active_rx_napi = 0; 776 } 777 778 static int ibmvnic_login(struct net_device *netdev) 779 { 780 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 781 unsigned long timeout = msecs_to_jiffies(30000); 782 struct device *dev = &adapter->vdev->dev; 783 int rc; 784 785 do { 786 if (adapter->renegotiate) { 787 adapter->renegotiate = false; 788 release_sub_crqs(adapter, 1); 789 790 reinit_completion(&adapter->init_done); 791 send_cap_queries(adapter); 792 if (!wait_for_completion_timeout(&adapter->init_done, 793 timeout)) { 794 dev_err(dev, "Capabilities query timeout\n"); 795 return -1; 796 } 797 rc = init_sub_crqs(adapter); 798 if (rc) { 799 dev_err(dev, 800 "Initialization of SCRQ's failed\n"); 801 return -1; 802 } 803 rc = init_sub_crq_irqs(adapter); 804 if (rc) { 805 dev_err(dev, 806 "Initialization of SCRQ's irqs failed\n"); 807 return -1; 808 } 809 } 810 811 reinit_completion(&adapter->init_done); 812 send_login(adapter); 813 if (!wait_for_completion_timeout(&adapter->init_done, 814 timeout)) { 815 dev_err(dev, "Login timeout\n"); 816 return -1; 817 } 818 } while (adapter->renegotiate); 819 820 /* handle pending MAC address changes after successful login */ 821 if (adapter->mac_change_pending) { 822 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 823 adapter->mac_change_pending = false; 824 } 825 826 return 0; 827 } 828 829 static void release_login_buffer(struct ibmvnic_adapter *adapter) 830 { 831 kfree(adapter->login_buf); 832 adapter->login_buf = NULL; 833 } 834 835 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 836 { 837 kfree(adapter->login_rsp_buf); 838 adapter->login_rsp_buf = NULL; 839 } 840 841 static void release_resources(struct ibmvnic_adapter *adapter) 842 { 843 release_vpd_data(adapter); 844 845 release_tx_pools(adapter); 846 release_rx_pools(adapter); 847 848 release_stats_token(adapter); 849 release_stats_buffers(adapter); 850 release_error_buffers(adapter); 851 release_napi(adapter); 852 release_login_rsp_buffer(adapter); 853 } 854 855 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 856 { 857 struct net_device *netdev = adapter->netdev; 858 unsigned long timeout = msecs_to_jiffies(30000); 859 union ibmvnic_crq crq; 860 bool resend; 861 int rc; 862 863 netdev_dbg(netdev, "setting link state %d\n", link_state); 864 865 memset(&crq, 0, sizeof(crq)); 866 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 867 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 868 crq.logical_link_state.link_state = link_state; 869 870 do { 871 resend = false; 872 873 reinit_completion(&adapter->init_done); 874 rc = ibmvnic_send_crq(adapter, &crq); 875 if (rc) { 876 netdev_err(netdev, "Failed to set link state\n"); 877 return rc; 878 } 879 880 if (!wait_for_completion_timeout(&adapter->init_done, 881 timeout)) { 882 netdev_err(netdev, "timeout setting link state\n"); 883 return -1; 884 } 885 886 if (adapter->init_done_rc == 1) { 887 /* Partuial success, delay and re-send */ 888 mdelay(1000); 889 resend = true; 890 } 891 } while (resend); 892 893 return 0; 894 } 895 896 static int set_real_num_queues(struct net_device *netdev) 897 { 898 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 899 int rc; 900 901 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 902 adapter->req_tx_queues, adapter->req_rx_queues); 903 904 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 905 if (rc) { 906 netdev_err(netdev, "failed to set the number of tx queues\n"); 907 return rc; 908 } 909 910 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 911 if (rc) 912 netdev_err(netdev, "failed to set the number of rx queues\n"); 913 914 return rc; 915 } 916 917 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 918 { 919 struct device *dev = &adapter->vdev->dev; 920 union ibmvnic_crq crq; 921 int len = 0; 922 923 if (adapter->vpd->buff) 924 len = adapter->vpd->len; 925 926 init_completion(&adapter->fw_done); 927 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 928 crq.get_vpd_size.cmd = GET_VPD_SIZE; 929 ibmvnic_send_crq(adapter, &crq); 930 wait_for_completion(&adapter->fw_done); 931 932 if (!adapter->vpd->len) 933 return -ENODATA; 934 935 if (!adapter->vpd->buff) 936 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 937 else if (adapter->vpd->len != len) 938 adapter->vpd->buff = 939 krealloc(adapter->vpd->buff, 940 adapter->vpd->len, GFP_KERNEL); 941 942 if (!adapter->vpd->buff) { 943 dev_err(dev, "Could allocate VPD buffer\n"); 944 return -ENOMEM; 945 } 946 947 adapter->vpd->dma_addr = 948 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 949 DMA_FROM_DEVICE); 950 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 951 dev_err(dev, "Could not map VPD buffer\n"); 952 kfree(adapter->vpd->buff); 953 adapter->vpd->buff = NULL; 954 return -ENOMEM; 955 } 956 957 reinit_completion(&adapter->fw_done); 958 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 959 crq.get_vpd.cmd = GET_VPD; 960 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 961 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 962 ibmvnic_send_crq(adapter, &crq); 963 wait_for_completion(&adapter->fw_done); 964 965 return 0; 966 } 967 968 static int init_resources(struct ibmvnic_adapter *adapter) 969 { 970 struct net_device *netdev = adapter->netdev; 971 int rc; 972 973 rc = set_real_num_queues(netdev); 974 if (rc) 975 return rc; 976 977 rc = init_stats_buffers(adapter); 978 if (rc) 979 return rc; 980 981 rc = init_stats_token(adapter); 982 if (rc) 983 return rc; 984 985 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 986 if (!adapter->vpd) 987 return -ENOMEM; 988 989 /* Vital Product Data (VPD) */ 990 rc = ibmvnic_get_vpd(adapter); 991 if (rc) { 992 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 993 return rc; 994 } 995 996 adapter->map_id = 1; 997 998 rc = init_napi(adapter); 999 if (rc) 1000 return rc; 1001 1002 send_map_query(adapter); 1003 1004 rc = init_rx_pools(netdev); 1005 if (rc) 1006 return rc; 1007 1008 rc = init_tx_pools(netdev); 1009 return rc; 1010 } 1011 1012 static int __ibmvnic_open(struct net_device *netdev) 1013 { 1014 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1015 enum vnic_state prev_state = adapter->state; 1016 int i, rc; 1017 1018 adapter->state = VNIC_OPENING; 1019 replenish_pools(adapter); 1020 ibmvnic_napi_enable(adapter); 1021 1022 /* We're ready to receive frames, enable the sub-crq interrupts and 1023 * set the logical link state to up 1024 */ 1025 for (i = 0; i < adapter->req_rx_queues; i++) { 1026 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1027 if (prev_state == VNIC_CLOSED) 1028 enable_irq(adapter->rx_scrq[i]->irq); 1029 else 1030 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1031 } 1032 1033 for (i = 0; i < adapter->req_tx_queues; i++) { 1034 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1035 if (prev_state == VNIC_CLOSED) 1036 enable_irq(adapter->tx_scrq[i]->irq); 1037 else 1038 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1039 } 1040 1041 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1042 if (rc) { 1043 for (i = 0; i < adapter->req_rx_queues; i++) 1044 napi_disable(&adapter->napi[i]); 1045 release_resources(adapter); 1046 return rc; 1047 } 1048 1049 netif_tx_start_all_queues(netdev); 1050 1051 if (prev_state == VNIC_CLOSED) { 1052 for (i = 0; i < adapter->req_rx_queues; i++) 1053 napi_schedule(&adapter->napi[i]); 1054 } 1055 1056 adapter->state = VNIC_OPEN; 1057 return rc; 1058 } 1059 1060 static int ibmvnic_open(struct net_device *netdev) 1061 { 1062 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1063 int rc; 1064 1065 mutex_lock(&adapter->reset_lock); 1066 1067 if (adapter->state != VNIC_CLOSED) { 1068 rc = ibmvnic_login(netdev); 1069 if (rc) { 1070 mutex_unlock(&adapter->reset_lock); 1071 return rc; 1072 } 1073 1074 rc = init_resources(adapter); 1075 if (rc) { 1076 netdev_err(netdev, "failed to initialize resources\n"); 1077 release_resources(adapter); 1078 mutex_unlock(&adapter->reset_lock); 1079 return rc; 1080 } 1081 } 1082 1083 rc = __ibmvnic_open(netdev); 1084 netif_carrier_on(netdev); 1085 1086 mutex_unlock(&adapter->reset_lock); 1087 1088 return rc; 1089 } 1090 1091 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1092 { 1093 struct ibmvnic_rx_pool *rx_pool; 1094 u64 rx_entries; 1095 int rx_scrqs; 1096 int i, j; 1097 1098 if (!adapter->rx_pool) 1099 return; 1100 1101 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 1102 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1103 1104 /* Free any remaining skbs in the rx buffer pools */ 1105 for (i = 0; i < rx_scrqs; i++) { 1106 rx_pool = &adapter->rx_pool[i]; 1107 if (!rx_pool) 1108 continue; 1109 1110 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1111 for (j = 0; j < rx_entries; j++) { 1112 if (rx_pool->rx_buff[j].skb) { 1113 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 1114 rx_pool->rx_buff[j].skb = NULL; 1115 } 1116 } 1117 } 1118 } 1119 1120 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1121 { 1122 struct ibmvnic_tx_pool *tx_pool; 1123 u64 tx_entries; 1124 int tx_scrqs; 1125 int i, j; 1126 1127 if (!adapter->tx_pool) 1128 return; 1129 1130 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 1131 tx_entries = adapter->req_tx_entries_per_subcrq; 1132 1133 /* Free any remaining skbs in the tx buffer pools */ 1134 for (i = 0; i < tx_scrqs; i++) { 1135 tx_pool = &adapter->tx_pool[i]; 1136 if (!tx_pool) 1137 continue; 1138 1139 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1140 for (j = 0; j < tx_entries; j++) { 1141 if (tx_pool->tx_buff[j].skb) { 1142 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 1143 tx_pool->tx_buff[j].skb = NULL; 1144 } 1145 } 1146 } 1147 } 1148 1149 static int __ibmvnic_close(struct net_device *netdev) 1150 { 1151 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1152 int rc = 0; 1153 int i; 1154 1155 adapter->state = VNIC_CLOSING; 1156 1157 /* ensure that transmissions are stopped if called by do_reset */ 1158 if (adapter->resetting) 1159 netif_tx_disable(netdev); 1160 else 1161 netif_tx_stop_all_queues(netdev); 1162 1163 ibmvnic_napi_disable(adapter); 1164 1165 if (adapter->tx_scrq) { 1166 for (i = 0; i < adapter->req_tx_queues; i++) 1167 if (adapter->tx_scrq[i]->irq) { 1168 netdev_dbg(adapter->netdev, 1169 "Disabling tx_scrq[%d] irq\n", i); 1170 disable_irq(adapter->tx_scrq[i]->irq); 1171 } 1172 } 1173 1174 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1175 if (rc) 1176 return rc; 1177 1178 if (adapter->rx_scrq) { 1179 for (i = 0; i < adapter->req_rx_queues; i++) { 1180 int retries = 10; 1181 1182 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 1183 retries--; 1184 mdelay(100); 1185 1186 if (retries == 0) 1187 break; 1188 } 1189 1190 if (adapter->rx_scrq[i]->irq) { 1191 netdev_dbg(adapter->netdev, 1192 "Disabling rx_scrq[%d] irq\n", i); 1193 disable_irq(adapter->rx_scrq[i]->irq); 1194 } 1195 } 1196 } 1197 clean_rx_pools(adapter); 1198 clean_tx_pools(adapter); 1199 adapter->state = VNIC_CLOSED; 1200 return rc; 1201 } 1202 1203 static int ibmvnic_close(struct net_device *netdev) 1204 { 1205 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1206 int rc; 1207 1208 mutex_lock(&adapter->reset_lock); 1209 rc = __ibmvnic_close(netdev); 1210 mutex_unlock(&adapter->reset_lock); 1211 1212 return rc; 1213 } 1214 1215 /** 1216 * build_hdr_data - creates L2/L3/L4 header data buffer 1217 * @hdr_field - bitfield determining needed headers 1218 * @skb - socket buffer 1219 * @hdr_len - array of header lengths 1220 * @tot_len - total length of data 1221 * 1222 * Reads hdr_field to determine which headers are needed by firmware. 1223 * Builds a buffer containing these headers. Saves individual header 1224 * lengths and total buffer length to be used to build descriptors. 1225 */ 1226 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1227 int *hdr_len, u8 *hdr_data) 1228 { 1229 int len = 0; 1230 u8 *hdr; 1231 1232 hdr_len[0] = sizeof(struct ethhdr); 1233 1234 if (skb->protocol == htons(ETH_P_IP)) { 1235 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1236 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1237 hdr_len[2] = tcp_hdrlen(skb); 1238 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1239 hdr_len[2] = sizeof(struct udphdr); 1240 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1241 hdr_len[1] = sizeof(struct ipv6hdr); 1242 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1243 hdr_len[2] = tcp_hdrlen(skb); 1244 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1245 hdr_len[2] = sizeof(struct udphdr); 1246 } else if (skb->protocol == htons(ETH_P_ARP)) { 1247 hdr_len[1] = arp_hdr_len(skb->dev); 1248 hdr_len[2] = 0; 1249 } 1250 1251 memset(hdr_data, 0, 120); 1252 if ((hdr_field >> 6) & 1) { 1253 hdr = skb_mac_header(skb); 1254 memcpy(hdr_data, hdr, hdr_len[0]); 1255 len += hdr_len[0]; 1256 } 1257 1258 if ((hdr_field >> 5) & 1) { 1259 hdr = skb_network_header(skb); 1260 memcpy(hdr_data + len, hdr, hdr_len[1]); 1261 len += hdr_len[1]; 1262 } 1263 1264 if ((hdr_field >> 4) & 1) { 1265 hdr = skb_transport_header(skb); 1266 memcpy(hdr_data + len, hdr, hdr_len[2]); 1267 len += hdr_len[2]; 1268 } 1269 return len; 1270 } 1271 1272 /** 1273 * create_hdr_descs - create header and header extension descriptors 1274 * @hdr_field - bitfield determining needed headers 1275 * @data - buffer containing header data 1276 * @len - length of data buffer 1277 * @hdr_len - array of individual header lengths 1278 * @scrq_arr - descriptor array 1279 * 1280 * Creates header and, if needed, header extension descriptors and 1281 * places them in a descriptor array, scrq_arr 1282 */ 1283 1284 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1285 union sub_crq *scrq_arr) 1286 { 1287 union sub_crq hdr_desc; 1288 int tmp_len = len; 1289 int num_descs = 0; 1290 u8 *data, *cur; 1291 int tmp; 1292 1293 while (tmp_len > 0) { 1294 cur = hdr_data + len - tmp_len; 1295 1296 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1297 if (cur != hdr_data) { 1298 data = hdr_desc.hdr_ext.data; 1299 tmp = tmp_len > 29 ? 29 : tmp_len; 1300 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1301 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1302 hdr_desc.hdr_ext.len = tmp; 1303 } else { 1304 data = hdr_desc.hdr.data; 1305 tmp = tmp_len > 24 ? 24 : tmp_len; 1306 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1307 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1308 hdr_desc.hdr.len = tmp; 1309 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1310 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1311 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1312 hdr_desc.hdr.flag = hdr_field << 1; 1313 } 1314 memcpy(data, cur, tmp); 1315 tmp_len -= tmp; 1316 *scrq_arr = hdr_desc; 1317 scrq_arr++; 1318 num_descs++; 1319 } 1320 1321 return num_descs; 1322 } 1323 1324 /** 1325 * build_hdr_descs_arr - build a header descriptor array 1326 * @skb - socket buffer 1327 * @num_entries - number of descriptors to be sent 1328 * @subcrq - first TX descriptor 1329 * @hdr_field - bit field determining which headers will be sent 1330 * 1331 * This function will build a TX descriptor array with applicable 1332 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1333 */ 1334 1335 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1336 int *num_entries, u8 hdr_field) 1337 { 1338 int hdr_len[3] = {0, 0, 0}; 1339 int tot_len; 1340 u8 *hdr_data = txbuff->hdr_data; 1341 1342 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1343 txbuff->hdr_data); 1344 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1345 txbuff->indir_arr + 1); 1346 } 1347 1348 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1349 { 1350 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1351 int queue_num = skb_get_queue_mapping(skb); 1352 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1353 struct device *dev = &adapter->vdev->dev; 1354 struct ibmvnic_tx_buff *tx_buff = NULL; 1355 struct ibmvnic_sub_crq_queue *tx_scrq; 1356 struct ibmvnic_tx_pool *tx_pool; 1357 unsigned int tx_send_failed = 0; 1358 unsigned int tx_map_failed = 0; 1359 unsigned int tx_dropped = 0; 1360 unsigned int tx_packets = 0; 1361 unsigned int tx_bytes = 0; 1362 dma_addr_t data_dma_addr; 1363 struct netdev_queue *txq; 1364 unsigned long lpar_rc; 1365 union sub_crq tx_crq; 1366 unsigned int offset; 1367 int num_entries = 1; 1368 unsigned char *dst; 1369 u64 *handle_array; 1370 int index = 0; 1371 u8 proto = 0; 1372 int ret = 0; 1373 1374 if (adapter->resetting) { 1375 if (!netif_subqueue_stopped(netdev, skb)) 1376 netif_stop_subqueue(netdev, queue_num); 1377 dev_kfree_skb_any(skb); 1378 1379 tx_send_failed++; 1380 tx_dropped++; 1381 ret = NETDEV_TX_OK; 1382 goto out; 1383 } 1384 1385 tx_pool = &adapter->tx_pool[queue_num]; 1386 tx_scrq = adapter->tx_scrq[queue_num]; 1387 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1388 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1389 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1390 1391 index = tx_pool->free_map[tx_pool->consumer_index]; 1392 1393 if (skb_is_gso(skb)) { 1394 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ; 1395 dst = tx_pool->tso_ltb.buff + offset; 1396 memset(dst, 0, IBMVNIC_TSO_BUF_SZ); 1397 data_dma_addr = tx_pool->tso_ltb.addr + offset; 1398 tx_pool->tso_index++; 1399 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS) 1400 tx_pool->tso_index = 0; 1401 } else { 1402 offset = index * adapter->req_mtu; 1403 dst = tx_pool->long_term_buff.buff + offset; 1404 memset(dst, 0, adapter->req_mtu); 1405 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1406 } 1407 1408 if (skb_shinfo(skb)->nr_frags) { 1409 int cur, i; 1410 1411 /* Copy the head */ 1412 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1413 cur = skb_headlen(skb); 1414 1415 /* Copy the frags */ 1416 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1417 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1418 1419 memcpy(dst + cur, 1420 page_address(skb_frag_page(frag)) + 1421 frag->page_offset, skb_frag_size(frag)); 1422 cur += skb_frag_size(frag); 1423 } 1424 } else { 1425 skb_copy_from_linear_data(skb, dst, skb->len); 1426 } 1427 1428 tx_pool->consumer_index = 1429 (tx_pool->consumer_index + 1) % 1430 adapter->req_tx_entries_per_subcrq; 1431 1432 tx_buff = &tx_pool->tx_buff[index]; 1433 tx_buff->skb = skb; 1434 tx_buff->data_dma[0] = data_dma_addr; 1435 tx_buff->data_len[0] = skb->len; 1436 tx_buff->index = index; 1437 tx_buff->pool_index = queue_num; 1438 tx_buff->last_frag = true; 1439 1440 memset(&tx_crq, 0, sizeof(tx_crq)); 1441 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1442 tx_crq.v1.type = IBMVNIC_TX_DESC; 1443 tx_crq.v1.n_crq_elem = 1; 1444 tx_crq.v1.n_sge = 1; 1445 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1446 tx_crq.v1.correlator = cpu_to_be32(index); 1447 if (skb_is_gso(skb)) 1448 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id); 1449 else 1450 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1451 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1452 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1453 1454 if (adapter->vlan_header_insertion) { 1455 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1456 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1457 } 1458 1459 if (skb->protocol == htons(ETH_P_IP)) { 1460 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1461 proto = ip_hdr(skb)->protocol; 1462 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1463 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1464 proto = ipv6_hdr(skb)->nexthdr; 1465 } 1466 1467 if (proto == IPPROTO_TCP) 1468 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1469 else if (proto == IPPROTO_UDP) 1470 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1471 1472 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1473 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1474 hdrs += 2; 1475 } 1476 if (skb_is_gso(skb)) { 1477 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1478 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1479 hdrs += 2; 1480 } 1481 /* determine if l2/3/4 headers are sent to firmware */ 1482 if ((*hdrs >> 7) & 1) { 1483 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1484 tx_crq.v1.n_crq_elem = num_entries; 1485 tx_buff->indir_arr[0] = tx_crq; 1486 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1487 sizeof(tx_buff->indir_arr), 1488 DMA_TO_DEVICE); 1489 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1490 dev_kfree_skb_any(skb); 1491 tx_buff->skb = NULL; 1492 if (!firmware_has_feature(FW_FEATURE_CMO)) 1493 dev_err(dev, "tx: unable to map descriptor array\n"); 1494 tx_map_failed++; 1495 tx_dropped++; 1496 ret = NETDEV_TX_OK; 1497 goto out; 1498 } 1499 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1500 (u64)tx_buff->indir_dma, 1501 (u64)num_entries); 1502 } else { 1503 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1504 &tx_crq); 1505 } 1506 if (lpar_rc != H_SUCCESS) { 1507 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1508 1509 if (tx_pool->consumer_index == 0) 1510 tx_pool->consumer_index = 1511 adapter->req_tx_entries_per_subcrq - 1; 1512 else 1513 tx_pool->consumer_index--; 1514 1515 dev_kfree_skb_any(skb); 1516 tx_buff->skb = NULL; 1517 1518 if (lpar_rc == H_CLOSED) { 1519 /* Disable TX and report carrier off if queue is closed. 1520 * Firmware guarantees that a signal will be sent to the 1521 * driver, triggering a reset or some other action. 1522 */ 1523 netif_tx_stop_all_queues(netdev); 1524 netif_carrier_off(netdev); 1525 } 1526 1527 tx_send_failed++; 1528 tx_dropped++; 1529 ret = NETDEV_TX_OK; 1530 goto out; 1531 } 1532 1533 if (atomic_add_return(num_entries, &tx_scrq->used) 1534 >= adapter->req_tx_entries_per_subcrq) { 1535 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1536 netif_stop_subqueue(netdev, queue_num); 1537 } 1538 1539 tx_buff->num_entries = num_entries; 1540 tx_packets++; 1541 tx_bytes += skb->len; 1542 txq->trans_start = jiffies; 1543 ret = NETDEV_TX_OK; 1544 1545 out: 1546 netdev->stats.tx_dropped += tx_dropped; 1547 netdev->stats.tx_bytes += tx_bytes; 1548 netdev->stats.tx_packets += tx_packets; 1549 adapter->tx_send_failed += tx_send_failed; 1550 adapter->tx_map_failed += tx_map_failed; 1551 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1552 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1553 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1554 1555 return ret; 1556 } 1557 1558 static void ibmvnic_set_multi(struct net_device *netdev) 1559 { 1560 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1561 struct netdev_hw_addr *ha; 1562 union ibmvnic_crq crq; 1563 1564 memset(&crq, 0, sizeof(crq)); 1565 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1566 crq.request_capability.cmd = REQUEST_CAPABILITY; 1567 1568 if (netdev->flags & IFF_PROMISC) { 1569 if (!adapter->promisc_supported) 1570 return; 1571 } else { 1572 if (netdev->flags & IFF_ALLMULTI) { 1573 /* Accept all multicast */ 1574 memset(&crq, 0, sizeof(crq)); 1575 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1576 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1577 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1578 ibmvnic_send_crq(adapter, &crq); 1579 } else if (netdev_mc_empty(netdev)) { 1580 /* Reject all multicast */ 1581 memset(&crq, 0, sizeof(crq)); 1582 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1583 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1584 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1585 ibmvnic_send_crq(adapter, &crq); 1586 } else { 1587 /* Accept one or more multicast(s) */ 1588 netdev_for_each_mc_addr(ha, netdev) { 1589 memset(&crq, 0, sizeof(crq)); 1590 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1591 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1592 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1593 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1594 ha->addr); 1595 ibmvnic_send_crq(adapter, &crq); 1596 } 1597 } 1598 } 1599 } 1600 1601 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1602 { 1603 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1604 struct sockaddr *addr = p; 1605 union ibmvnic_crq crq; 1606 1607 if (!is_valid_ether_addr(addr->sa_data)) 1608 return -EADDRNOTAVAIL; 1609 1610 memset(&crq, 0, sizeof(crq)); 1611 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1612 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1613 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1614 1615 init_completion(&adapter->fw_done); 1616 ibmvnic_send_crq(adapter, &crq); 1617 wait_for_completion(&adapter->fw_done); 1618 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1619 return adapter->fw_done_rc ? -EIO : 0; 1620 } 1621 1622 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1623 { 1624 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1625 struct sockaddr *addr = p; 1626 int rc; 1627 1628 if (adapter->state == VNIC_PROBED) { 1629 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1630 adapter->mac_change_pending = true; 1631 return 0; 1632 } 1633 1634 rc = __ibmvnic_set_mac(netdev, addr); 1635 1636 return rc; 1637 } 1638 1639 /** 1640 * do_reset returns zero if we are able to keep processing reset events, or 1641 * non-zero if we hit a fatal error and must halt. 1642 */ 1643 static int do_reset(struct ibmvnic_adapter *adapter, 1644 struct ibmvnic_rwi *rwi, u32 reset_state) 1645 { 1646 u64 old_num_rx_queues, old_num_tx_queues; 1647 struct net_device *netdev = adapter->netdev; 1648 int i, rc; 1649 1650 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1651 rwi->reset_reason); 1652 1653 netif_carrier_off(netdev); 1654 adapter->reset_reason = rwi->reset_reason; 1655 1656 old_num_rx_queues = adapter->req_rx_queues; 1657 old_num_tx_queues = adapter->req_tx_queues; 1658 1659 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1660 rc = ibmvnic_reenable_crq_queue(adapter); 1661 if (rc) 1662 return 0; 1663 } 1664 1665 rc = __ibmvnic_close(netdev); 1666 if (rc) 1667 return rc; 1668 1669 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1670 adapter->wait_for_reset) { 1671 release_resources(adapter); 1672 release_sub_crqs(adapter, 1); 1673 release_crq_queue(adapter); 1674 } 1675 1676 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1677 /* remove the closed state so when we call open it appears 1678 * we are coming from the probed state. 1679 */ 1680 adapter->state = VNIC_PROBED; 1681 1682 rc = ibmvnic_init(adapter); 1683 if (rc) 1684 return IBMVNIC_INIT_FAILED; 1685 1686 /* If the adapter was in PROBE state prior to the reset, 1687 * exit here. 1688 */ 1689 if (reset_state == VNIC_PROBED) 1690 return 0; 1691 1692 rc = ibmvnic_login(netdev); 1693 if (rc) { 1694 adapter->state = VNIC_PROBED; 1695 return 0; 1696 } 1697 1698 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1699 adapter->wait_for_reset) { 1700 rc = init_resources(adapter); 1701 if (rc) 1702 return rc; 1703 } else if (adapter->req_rx_queues != old_num_rx_queues || 1704 adapter->req_tx_queues != old_num_tx_queues) { 1705 adapter->map_id = 1; 1706 release_rx_pools(adapter); 1707 release_tx_pools(adapter); 1708 init_rx_pools(netdev); 1709 init_tx_pools(netdev); 1710 1711 release_napi(adapter); 1712 init_napi(adapter); 1713 } else { 1714 rc = reset_tx_pools(adapter); 1715 if (rc) 1716 return rc; 1717 1718 rc = reset_rx_pools(adapter); 1719 if (rc) 1720 return rc; 1721 1722 if (reset_state == VNIC_CLOSED) 1723 return 0; 1724 } 1725 } 1726 1727 rc = __ibmvnic_open(netdev); 1728 if (rc) { 1729 if (list_empty(&adapter->rwi_list)) 1730 adapter->state = VNIC_CLOSED; 1731 else 1732 adapter->state = reset_state; 1733 1734 return 0; 1735 } 1736 1737 /* kick napi */ 1738 for (i = 0; i < adapter->req_rx_queues; i++) 1739 napi_schedule(&adapter->napi[i]); 1740 1741 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1742 netdev_notify_peers(netdev); 1743 1744 netif_carrier_on(netdev); 1745 1746 return 0; 1747 } 1748 1749 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1750 { 1751 struct ibmvnic_rwi *rwi; 1752 1753 mutex_lock(&adapter->rwi_lock); 1754 1755 if (!list_empty(&adapter->rwi_list)) { 1756 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1757 list); 1758 list_del(&rwi->list); 1759 } else { 1760 rwi = NULL; 1761 } 1762 1763 mutex_unlock(&adapter->rwi_lock); 1764 return rwi; 1765 } 1766 1767 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1768 { 1769 struct ibmvnic_rwi *rwi; 1770 1771 rwi = get_next_rwi(adapter); 1772 while (rwi) { 1773 kfree(rwi); 1774 rwi = get_next_rwi(adapter); 1775 } 1776 } 1777 1778 static void __ibmvnic_reset(struct work_struct *work) 1779 { 1780 struct ibmvnic_rwi *rwi; 1781 struct ibmvnic_adapter *adapter; 1782 struct net_device *netdev; 1783 u32 reset_state; 1784 int rc = 0; 1785 1786 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1787 netdev = adapter->netdev; 1788 1789 mutex_lock(&adapter->reset_lock); 1790 adapter->resetting = true; 1791 reset_state = adapter->state; 1792 1793 rwi = get_next_rwi(adapter); 1794 while (rwi) { 1795 rc = do_reset(adapter, rwi, reset_state); 1796 kfree(rwi); 1797 if (rc && rc != IBMVNIC_INIT_FAILED) 1798 break; 1799 1800 rwi = get_next_rwi(adapter); 1801 } 1802 1803 if (adapter->wait_for_reset) { 1804 adapter->wait_for_reset = false; 1805 adapter->reset_done_rc = rc; 1806 complete(&adapter->reset_done); 1807 } 1808 1809 if (rc) { 1810 netdev_dbg(adapter->netdev, "Reset failed\n"); 1811 free_all_rwi(adapter); 1812 mutex_unlock(&adapter->reset_lock); 1813 return; 1814 } 1815 1816 adapter->resetting = false; 1817 mutex_unlock(&adapter->reset_lock); 1818 } 1819 1820 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1821 enum ibmvnic_reset_reason reason) 1822 { 1823 struct ibmvnic_rwi *rwi, *tmp; 1824 struct net_device *netdev = adapter->netdev; 1825 struct list_head *entry; 1826 1827 if (adapter->state == VNIC_REMOVING || 1828 adapter->state == VNIC_REMOVED) { 1829 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1830 return; 1831 } 1832 1833 if (adapter->state == VNIC_PROBING) { 1834 netdev_warn(netdev, "Adapter reset during probe\n"); 1835 adapter->init_done_rc = EAGAIN; 1836 return; 1837 } 1838 1839 mutex_lock(&adapter->rwi_lock); 1840 1841 list_for_each(entry, &adapter->rwi_list) { 1842 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1843 if (tmp->reset_reason == reason) { 1844 netdev_dbg(netdev, "Skipping matching reset\n"); 1845 mutex_unlock(&adapter->rwi_lock); 1846 return; 1847 } 1848 } 1849 1850 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1851 if (!rwi) { 1852 mutex_unlock(&adapter->rwi_lock); 1853 ibmvnic_close(netdev); 1854 return; 1855 } 1856 1857 rwi->reset_reason = reason; 1858 list_add_tail(&rwi->list, &adapter->rwi_list); 1859 mutex_unlock(&adapter->rwi_lock); 1860 1861 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 1862 schedule_work(&adapter->ibmvnic_reset); 1863 } 1864 1865 static void ibmvnic_tx_timeout(struct net_device *dev) 1866 { 1867 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1868 1869 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1870 } 1871 1872 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1873 struct ibmvnic_rx_buff *rx_buff) 1874 { 1875 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1876 1877 rx_buff->skb = NULL; 1878 1879 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1880 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1881 1882 atomic_dec(&pool->available); 1883 } 1884 1885 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1886 { 1887 struct net_device *netdev = napi->dev; 1888 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1889 int scrq_num = (int)(napi - adapter->napi); 1890 int frames_processed = 0; 1891 1892 restart_poll: 1893 while (frames_processed < budget) { 1894 struct sk_buff *skb; 1895 struct ibmvnic_rx_buff *rx_buff; 1896 union sub_crq *next; 1897 u32 length; 1898 u16 offset; 1899 u8 flags = 0; 1900 1901 if (unlikely(adapter->resetting && 1902 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 1903 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1904 napi_complete_done(napi, frames_processed); 1905 return frames_processed; 1906 } 1907 1908 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1909 break; 1910 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1911 rx_buff = 1912 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1913 rx_comp.correlator); 1914 /* do error checking */ 1915 if (next->rx_comp.rc) { 1916 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 1917 be16_to_cpu(next->rx_comp.rc)); 1918 /* free the entry */ 1919 next->rx_comp.first = 0; 1920 dev_kfree_skb_any(rx_buff->skb); 1921 remove_buff_from_pool(adapter, rx_buff); 1922 continue; 1923 } 1924 1925 length = be32_to_cpu(next->rx_comp.len); 1926 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1927 flags = next->rx_comp.flags; 1928 skb = rx_buff->skb; 1929 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1930 length); 1931 1932 /* VLAN Header has been stripped by the system firmware and 1933 * needs to be inserted by the driver 1934 */ 1935 if (adapter->rx_vlan_header_insertion && 1936 (flags & IBMVNIC_VLAN_STRIPPED)) 1937 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1938 ntohs(next->rx_comp.vlan_tci)); 1939 1940 /* free the entry */ 1941 next->rx_comp.first = 0; 1942 remove_buff_from_pool(adapter, rx_buff); 1943 1944 skb_put(skb, length); 1945 skb->protocol = eth_type_trans(skb, netdev); 1946 skb_record_rx_queue(skb, scrq_num); 1947 1948 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1949 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1950 skb->ip_summed = CHECKSUM_UNNECESSARY; 1951 } 1952 1953 length = skb->len; 1954 napi_gro_receive(napi, skb); /* send it up */ 1955 netdev->stats.rx_packets++; 1956 netdev->stats.rx_bytes += length; 1957 adapter->rx_stats_buffers[scrq_num].packets++; 1958 adapter->rx_stats_buffers[scrq_num].bytes += length; 1959 frames_processed++; 1960 } 1961 1962 if (adapter->state != VNIC_CLOSING) 1963 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1964 1965 if (frames_processed < budget) { 1966 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1967 napi_complete_done(napi, frames_processed); 1968 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1969 napi_reschedule(napi)) { 1970 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1971 goto restart_poll; 1972 } 1973 } 1974 return frames_processed; 1975 } 1976 1977 #ifdef CONFIG_NET_POLL_CONTROLLER 1978 static void ibmvnic_netpoll_controller(struct net_device *dev) 1979 { 1980 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1981 int i; 1982 1983 replenish_pools(netdev_priv(dev)); 1984 for (i = 0; i < adapter->req_rx_queues; i++) 1985 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1986 adapter->rx_scrq[i]); 1987 } 1988 #endif 1989 1990 static int wait_for_reset(struct ibmvnic_adapter *adapter) 1991 { 1992 adapter->fallback.mtu = adapter->req_mtu; 1993 adapter->fallback.rx_queues = adapter->req_rx_queues; 1994 adapter->fallback.tx_queues = adapter->req_tx_queues; 1995 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 1996 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 1997 1998 init_completion(&adapter->reset_done); 1999 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2000 adapter->wait_for_reset = true; 2001 wait_for_completion(&adapter->reset_done); 2002 2003 if (adapter->reset_done_rc) { 2004 adapter->desired.mtu = adapter->fallback.mtu; 2005 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2006 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2007 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2008 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2009 2010 init_completion(&adapter->reset_done); 2011 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2012 wait_for_completion(&adapter->reset_done); 2013 } 2014 adapter->wait_for_reset = false; 2015 2016 return adapter->reset_done_rc; 2017 } 2018 2019 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2020 { 2021 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2022 2023 adapter->desired.mtu = new_mtu + ETH_HLEN; 2024 2025 return wait_for_reset(adapter); 2026 } 2027 2028 static const struct net_device_ops ibmvnic_netdev_ops = { 2029 .ndo_open = ibmvnic_open, 2030 .ndo_stop = ibmvnic_close, 2031 .ndo_start_xmit = ibmvnic_xmit, 2032 .ndo_set_rx_mode = ibmvnic_set_multi, 2033 .ndo_set_mac_address = ibmvnic_set_mac, 2034 .ndo_validate_addr = eth_validate_addr, 2035 .ndo_tx_timeout = ibmvnic_tx_timeout, 2036 #ifdef CONFIG_NET_POLL_CONTROLLER 2037 .ndo_poll_controller = ibmvnic_netpoll_controller, 2038 #endif 2039 .ndo_change_mtu = ibmvnic_change_mtu, 2040 }; 2041 2042 /* ethtool functions */ 2043 2044 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2045 struct ethtool_link_ksettings *cmd) 2046 { 2047 u32 supported, advertising; 2048 2049 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2050 SUPPORTED_FIBRE); 2051 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2052 ADVERTISED_FIBRE); 2053 cmd->base.speed = SPEED_1000; 2054 cmd->base.duplex = DUPLEX_FULL; 2055 cmd->base.port = PORT_FIBRE; 2056 cmd->base.phy_address = 0; 2057 cmd->base.autoneg = AUTONEG_ENABLE; 2058 2059 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2060 supported); 2061 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2062 advertising); 2063 2064 return 0; 2065 } 2066 2067 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2068 struct ethtool_drvinfo *info) 2069 { 2070 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2071 2072 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2073 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2074 strlcpy(info->fw_version, adapter->fw_version, 2075 sizeof(info->fw_version)); 2076 } 2077 2078 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2079 { 2080 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2081 2082 return adapter->msg_enable; 2083 } 2084 2085 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2086 { 2087 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2088 2089 adapter->msg_enable = data; 2090 } 2091 2092 static u32 ibmvnic_get_link(struct net_device *netdev) 2093 { 2094 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2095 2096 /* Don't need to send a query because we request a logical link up at 2097 * init and then we wait for link state indications 2098 */ 2099 return adapter->logical_link_state; 2100 } 2101 2102 static void ibmvnic_get_ringparam(struct net_device *netdev, 2103 struct ethtool_ringparam *ring) 2104 { 2105 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2106 2107 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2108 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2109 ring->rx_mini_max_pending = 0; 2110 ring->rx_jumbo_max_pending = 0; 2111 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2112 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2113 ring->rx_mini_pending = 0; 2114 ring->rx_jumbo_pending = 0; 2115 } 2116 2117 static int ibmvnic_set_ringparam(struct net_device *netdev, 2118 struct ethtool_ringparam *ring) 2119 { 2120 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2121 2122 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2123 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2124 netdev_err(netdev, "Invalid request.\n"); 2125 netdev_err(netdev, "Max tx buffers = %llu\n", 2126 adapter->max_rx_add_entries_per_subcrq); 2127 netdev_err(netdev, "Max rx buffers = %llu\n", 2128 adapter->max_tx_entries_per_subcrq); 2129 return -EINVAL; 2130 } 2131 2132 adapter->desired.rx_entries = ring->rx_pending; 2133 adapter->desired.tx_entries = ring->tx_pending; 2134 2135 return wait_for_reset(adapter); 2136 } 2137 2138 static void ibmvnic_get_channels(struct net_device *netdev, 2139 struct ethtool_channels *channels) 2140 { 2141 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2142 2143 channels->max_rx = adapter->max_rx_queues; 2144 channels->max_tx = adapter->max_tx_queues; 2145 channels->max_other = 0; 2146 channels->max_combined = 0; 2147 channels->rx_count = adapter->req_rx_queues; 2148 channels->tx_count = adapter->req_tx_queues; 2149 channels->other_count = 0; 2150 channels->combined_count = 0; 2151 } 2152 2153 static int ibmvnic_set_channels(struct net_device *netdev, 2154 struct ethtool_channels *channels) 2155 { 2156 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2157 2158 adapter->desired.rx_queues = channels->rx_count; 2159 adapter->desired.tx_queues = channels->tx_count; 2160 2161 return wait_for_reset(adapter); 2162 } 2163 2164 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2165 { 2166 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2167 int i; 2168 2169 if (stringset != ETH_SS_STATS) 2170 return; 2171 2172 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2173 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2174 2175 for (i = 0; i < adapter->req_tx_queues; i++) { 2176 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2177 data += ETH_GSTRING_LEN; 2178 2179 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2180 data += ETH_GSTRING_LEN; 2181 2182 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2183 data += ETH_GSTRING_LEN; 2184 } 2185 2186 for (i = 0; i < adapter->req_rx_queues; i++) { 2187 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2188 data += ETH_GSTRING_LEN; 2189 2190 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2191 data += ETH_GSTRING_LEN; 2192 2193 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2194 data += ETH_GSTRING_LEN; 2195 } 2196 } 2197 2198 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2199 { 2200 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2201 2202 switch (sset) { 2203 case ETH_SS_STATS: 2204 return ARRAY_SIZE(ibmvnic_stats) + 2205 adapter->req_tx_queues * NUM_TX_STATS + 2206 adapter->req_rx_queues * NUM_RX_STATS; 2207 default: 2208 return -EOPNOTSUPP; 2209 } 2210 } 2211 2212 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2213 struct ethtool_stats *stats, u64 *data) 2214 { 2215 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2216 union ibmvnic_crq crq; 2217 int i, j; 2218 2219 memset(&crq, 0, sizeof(crq)); 2220 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2221 crq.request_statistics.cmd = REQUEST_STATISTICS; 2222 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2223 crq.request_statistics.len = 2224 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2225 2226 /* Wait for data to be written */ 2227 init_completion(&adapter->stats_done); 2228 ibmvnic_send_crq(adapter, &crq); 2229 wait_for_completion(&adapter->stats_done); 2230 2231 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2232 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2233 ibmvnic_stats[i].offset)); 2234 2235 for (j = 0; j < adapter->req_tx_queues; j++) { 2236 data[i] = adapter->tx_stats_buffers[j].packets; 2237 i++; 2238 data[i] = adapter->tx_stats_buffers[j].bytes; 2239 i++; 2240 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2241 i++; 2242 } 2243 2244 for (j = 0; j < adapter->req_rx_queues; j++) { 2245 data[i] = adapter->rx_stats_buffers[j].packets; 2246 i++; 2247 data[i] = adapter->rx_stats_buffers[j].bytes; 2248 i++; 2249 data[i] = adapter->rx_stats_buffers[j].interrupts; 2250 i++; 2251 } 2252 } 2253 2254 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2255 .get_drvinfo = ibmvnic_get_drvinfo, 2256 .get_msglevel = ibmvnic_get_msglevel, 2257 .set_msglevel = ibmvnic_set_msglevel, 2258 .get_link = ibmvnic_get_link, 2259 .get_ringparam = ibmvnic_get_ringparam, 2260 .set_ringparam = ibmvnic_set_ringparam, 2261 .get_channels = ibmvnic_get_channels, 2262 .set_channels = ibmvnic_set_channels, 2263 .get_strings = ibmvnic_get_strings, 2264 .get_sset_count = ibmvnic_get_sset_count, 2265 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2266 .get_link_ksettings = ibmvnic_get_link_ksettings, 2267 }; 2268 2269 /* Routines for managing CRQs/sCRQs */ 2270 2271 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2272 struct ibmvnic_sub_crq_queue *scrq) 2273 { 2274 int rc; 2275 2276 if (scrq->irq) { 2277 free_irq(scrq->irq, scrq); 2278 irq_dispose_mapping(scrq->irq); 2279 scrq->irq = 0; 2280 } 2281 2282 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2283 scrq->cur = 0; 2284 2285 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2286 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2287 return rc; 2288 } 2289 2290 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2291 { 2292 int i, rc; 2293 2294 for (i = 0; i < adapter->req_tx_queues; i++) { 2295 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2296 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2297 if (rc) 2298 return rc; 2299 } 2300 2301 for (i = 0; i < adapter->req_rx_queues; i++) { 2302 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2303 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2304 if (rc) 2305 return rc; 2306 } 2307 2308 return rc; 2309 } 2310 2311 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2312 struct ibmvnic_sub_crq_queue *scrq, 2313 bool do_h_free) 2314 { 2315 struct device *dev = &adapter->vdev->dev; 2316 long rc; 2317 2318 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2319 2320 if (do_h_free) { 2321 /* Close the sub-crqs */ 2322 do { 2323 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2324 adapter->vdev->unit_address, 2325 scrq->crq_num); 2326 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2327 2328 if (rc) { 2329 netdev_err(adapter->netdev, 2330 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2331 scrq->crq_num, rc); 2332 } 2333 } 2334 2335 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2336 DMA_BIDIRECTIONAL); 2337 free_pages((unsigned long)scrq->msgs, 2); 2338 kfree(scrq); 2339 } 2340 2341 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2342 *adapter) 2343 { 2344 struct device *dev = &adapter->vdev->dev; 2345 struct ibmvnic_sub_crq_queue *scrq; 2346 int rc; 2347 2348 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2349 if (!scrq) 2350 return NULL; 2351 2352 scrq->msgs = 2353 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2354 if (!scrq->msgs) { 2355 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2356 goto zero_page_failed; 2357 } 2358 2359 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2360 DMA_BIDIRECTIONAL); 2361 if (dma_mapping_error(dev, scrq->msg_token)) { 2362 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2363 goto map_failed; 2364 } 2365 2366 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2367 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2368 2369 if (rc == H_RESOURCE) 2370 rc = ibmvnic_reset_crq(adapter); 2371 2372 if (rc == H_CLOSED) { 2373 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2374 } else if (rc) { 2375 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2376 goto reg_failed; 2377 } 2378 2379 scrq->adapter = adapter; 2380 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2381 spin_lock_init(&scrq->lock); 2382 2383 netdev_dbg(adapter->netdev, 2384 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2385 scrq->crq_num, scrq->hw_irq, scrq->irq); 2386 2387 return scrq; 2388 2389 reg_failed: 2390 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2391 DMA_BIDIRECTIONAL); 2392 map_failed: 2393 free_pages((unsigned long)scrq->msgs, 2); 2394 zero_page_failed: 2395 kfree(scrq); 2396 2397 return NULL; 2398 } 2399 2400 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2401 { 2402 int i; 2403 2404 if (adapter->tx_scrq) { 2405 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2406 if (!adapter->tx_scrq[i]) 2407 continue; 2408 2409 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2410 i); 2411 if (adapter->tx_scrq[i]->irq) { 2412 free_irq(adapter->tx_scrq[i]->irq, 2413 adapter->tx_scrq[i]); 2414 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2415 adapter->tx_scrq[i]->irq = 0; 2416 } 2417 2418 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2419 do_h_free); 2420 } 2421 2422 kfree(adapter->tx_scrq); 2423 adapter->tx_scrq = NULL; 2424 adapter->num_active_tx_scrqs = 0; 2425 } 2426 2427 if (adapter->rx_scrq) { 2428 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2429 if (!adapter->rx_scrq[i]) 2430 continue; 2431 2432 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2433 i); 2434 if (adapter->rx_scrq[i]->irq) { 2435 free_irq(adapter->rx_scrq[i]->irq, 2436 adapter->rx_scrq[i]); 2437 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2438 adapter->rx_scrq[i]->irq = 0; 2439 } 2440 2441 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2442 do_h_free); 2443 } 2444 2445 kfree(adapter->rx_scrq); 2446 adapter->rx_scrq = NULL; 2447 adapter->num_active_rx_scrqs = 0; 2448 } 2449 } 2450 2451 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2452 struct ibmvnic_sub_crq_queue *scrq) 2453 { 2454 struct device *dev = &adapter->vdev->dev; 2455 unsigned long rc; 2456 2457 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2458 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2459 if (rc) 2460 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2461 scrq->hw_irq, rc); 2462 return rc; 2463 } 2464 2465 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2466 struct ibmvnic_sub_crq_queue *scrq) 2467 { 2468 struct device *dev = &adapter->vdev->dev; 2469 unsigned long rc; 2470 2471 if (scrq->hw_irq > 0x100000000ULL) { 2472 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2473 return 1; 2474 } 2475 2476 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2477 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2478 if (rc) 2479 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2480 scrq->hw_irq, rc); 2481 return rc; 2482 } 2483 2484 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2485 struct ibmvnic_sub_crq_queue *scrq) 2486 { 2487 struct device *dev = &adapter->vdev->dev; 2488 struct ibmvnic_tx_buff *txbuff; 2489 union sub_crq *next; 2490 int index; 2491 int i, j; 2492 u8 first; 2493 2494 restart_loop: 2495 while (pending_scrq(adapter, scrq)) { 2496 unsigned int pool = scrq->pool_index; 2497 int num_entries = 0; 2498 2499 next = ibmvnic_next_scrq(adapter, scrq); 2500 for (i = 0; i < next->tx_comp.num_comps; i++) { 2501 if (next->tx_comp.rcs[i]) { 2502 dev_err(dev, "tx error %x\n", 2503 next->tx_comp.rcs[i]); 2504 continue; 2505 } 2506 index = be32_to_cpu(next->tx_comp.correlators[i]); 2507 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 2508 2509 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2510 if (!txbuff->data_dma[j]) 2511 continue; 2512 2513 txbuff->data_dma[j] = 0; 2514 } 2515 /* if sub_crq was sent indirectly */ 2516 first = txbuff->indir_arr[0].generic.first; 2517 if (first == IBMVNIC_CRQ_CMD) { 2518 dma_unmap_single(dev, txbuff->indir_dma, 2519 sizeof(txbuff->indir_arr), 2520 DMA_TO_DEVICE); 2521 } 2522 2523 if (txbuff->last_frag) { 2524 dev_kfree_skb_any(txbuff->skb); 2525 txbuff->skb = NULL; 2526 } 2527 2528 num_entries += txbuff->num_entries; 2529 2530 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2531 producer_index] = index; 2532 adapter->tx_pool[pool].producer_index = 2533 (adapter->tx_pool[pool].producer_index + 1) % 2534 adapter->req_tx_entries_per_subcrq; 2535 } 2536 /* remove tx_comp scrq*/ 2537 next->tx_comp.first = 0; 2538 2539 if (atomic_sub_return(num_entries, &scrq->used) <= 2540 (adapter->req_tx_entries_per_subcrq / 2) && 2541 __netif_subqueue_stopped(adapter->netdev, 2542 scrq->pool_index)) { 2543 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2544 netdev_info(adapter->netdev, "Started queue %d\n", 2545 scrq->pool_index); 2546 } 2547 } 2548 2549 enable_scrq_irq(adapter, scrq); 2550 2551 if (pending_scrq(adapter, scrq)) { 2552 disable_scrq_irq(adapter, scrq); 2553 goto restart_loop; 2554 } 2555 2556 return 0; 2557 } 2558 2559 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2560 { 2561 struct ibmvnic_sub_crq_queue *scrq = instance; 2562 struct ibmvnic_adapter *adapter = scrq->adapter; 2563 2564 disable_scrq_irq(adapter, scrq); 2565 ibmvnic_complete_tx(adapter, scrq); 2566 2567 return IRQ_HANDLED; 2568 } 2569 2570 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2571 { 2572 struct ibmvnic_sub_crq_queue *scrq = instance; 2573 struct ibmvnic_adapter *adapter = scrq->adapter; 2574 2575 /* When booting a kdump kernel we can hit pending interrupts 2576 * prior to completing driver initialization. 2577 */ 2578 if (unlikely(adapter->state != VNIC_OPEN)) 2579 return IRQ_NONE; 2580 2581 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2582 2583 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2584 disable_scrq_irq(adapter, scrq); 2585 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2586 } 2587 2588 return IRQ_HANDLED; 2589 } 2590 2591 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2592 { 2593 struct device *dev = &adapter->vdev->dev; 2594 struct ibmvnic_sub_crq_queue *scrq; 2595 int i = 0, j = 0; 2596 int rc = 0; 2597 2598 for (i = 0; i < adapter->req_tx_queues; i++) { 2599 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2600 i); 2601 scrq = adapter->tx_scrq[i]; 2602 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2603 2604 if (!scrq->irq) { 2605 rc = -EINVAL; 2606 dev_err(dev, "Error mapping irq\n"); 2607 goto req_tx_irq_failed; 2608 } 2609 2610 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2611 0, "ibmvnic_tx", scrq); 2612 2613 if (rc) { 2614 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2615 scrq->irq, rc); 2616 irq_dispose_mapping(scrq->irq); 2617 goto req_tx_irq_failed; 2618 } 2619 } 2620 2621 for (i = 0; i < adapter->req_rx_queues; i++) { 2622 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2623 i); 2624 scrq = adapter->rx_scrq[i]; 2625 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2626 if (!scrq->irq) { 2627 rc = -EINVAL; 2628 dev_err(dev, "Error mapping irq\n"); 2629 goto req_rx_irq_failed; 2630 } 2631 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2632 0, "ibmvnic_rx", scrq); 2633 if (rc) { 2634 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2635 scrq->irq, rc); 2636 irq_dispose_mapping(scrq->irq); 2637 goto req_rx_irq_failed; 2638 } 2639 } 2640 return rc; 2641 2642 req_rx_irq_failed: 2643 for (j = 0; j < i; j++) { 2644 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2645 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2646 } 2647 i = adapter->req_tx_queues; 2648 req_tx_irq_failed: 2649 for (j = 0; j < i; j++) { 2650 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2651 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2652 } 2653 release_sub_crqs(adapter, 1); 2654 return rc; 2655 } 2656 2657 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2658 { 2659 struct device *dev = &adapter->vdev->dev; 2660 struct ibmvnic_sub_crq_queue **allqueues; 2661 int registered_queues = 0; 2662 int total_queues; 2663 int more = 0; 2664 int i; 2665 2666 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2667 2668 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2669 if (!allqueues) 2670 return -1; 2671 2672 for (i = 0; i < total_queues; i++) { 2673 allqueues[i] = init_sub_crq_queue(adapter); 2674 if (!allqueues[i]) { 2675 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2676 break; 2677 } 2678 registered_queues++; 2679 } 2680 2681 /* Make sure we were able to register the minimum number of queues */ 2682 if (registered_queues < 2683 adapter->min_tx_queues + adapter->min_rx_queues) { 2684 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2685 goto tx_failed; 2686 } 2687 2688 /* Distribute the failed allocated queues*/ 2689 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2690 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2691 switch (i % 3) { 2692 case 0: 2693 if (adapter->req_rx_queues > adapter->min_rx_queues) 2694 adapter->req_rx_queues--; 2695 else 2696 more++; 2697 break; 2698 case 1: 2699 if (adapter->req_tx_queues > adapter->min_tx_queues) 2700 adapter->req_tx_queues--; 2701 else 2702 more++; 2703 break; 2704 } 2705 } 2706 2707 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2708 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2709 if (!adapter->tx_scrq) 2710 goto tx_failed; 2711 2712 for (i = 0; i < adapter->req_tx_queues; i++) { 2713 adapter->tx_scrq[i] = allqueues[i]; 2714 adapter->tx_scrq[i]->pool_index = i; 2715 adapter->num_active_tx_scrqs++; 2716 } 2717 2718 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2719 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2720 if (!adapter->rx_scrq) 2721 goto rx_failed; 2722 2723 for (i = 0; i < adapter->req_rx_queues; i++) { 2724 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2725 adapter->rx_scrq[i]->scrq_num = i; 2726 adapter->num_active_rx_scrqs++; 2727 } 2728 2729 kfree(allqueues); 2730 return 0; 2731 2732 rx_failed: 2733 kfree(adapter->tx_scrq); 2734 adapter->tx_scrq = NULL; 2735 tx_failed: 2736 for (i = 0; i < registered_queues; i++) 2737 release_sub_crq_queue(adapter, allqueues[i], 1); 2738 kfree(allqueues); 2739 return -1; 2740 } 2741 2742 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2743 { 2744 struct device *dev = &adapter->vdev->dev; 2745 union ibmvnic_crq crq; 2746 int max_entries; 2747 2748 if (!retry) { 2749 /* Sub-CRQ entries are 32 byte long */ 2750 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2751 2752 if (adapter->min_tx_entries_per_subcrq > entries_page || 2753 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2754 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2755 return; 2756 } 2757 2758 if (adapter->desired.mtu) 2759 adapter->req_mtu = adapter->desired.mtu; 2760 else 2761 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2762 2763 if (!adapter->desired.tx_entries) 2764 adapter->desired.tx_entries = 2765 adapter->max_tx_entries_per_subcrq; 2766 if (!adapter->desired.rx_entries) 2767 adapter->desired.rx_entries = 2768 adapter->max_rx_add_entries_per_subcrq; 2769 2770 max_entries = IBMVNIC_MAX_LTB_SIZE / 2771 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 2772 2773 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2774 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 2775 adapter->desired.tx_entries = max_entries; 2776 } 2777 2778 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2779 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 2780 adapter->desired.rx_entries = max_entries; 2781 } 2782 2783 if (adapter->desired.tx_entries) 2784 adapter->req_tx_entries_per_subcrq = 2785 adapter->desired.tx_entries; 2786 else 2787 adapter->req_tx_entries_per_subcrq = 2788 adapter->max_tx_entries_per_subcrq; 2789 2790 if (adapter->desired.rx_entries) 2791 adapter->req_rx_add_entries_per_subcrq = 2792 adapter->desired.rx_entries; 2793 else 2794 adapter->req_rx_add_entries_per_subcrq = 2795 adapter->max_rx_add_entries_per_subcrq; 2796 2797 if (adapter->desired.tx_queues) 2798 adapter->req_tx_queues = 2799 adapter->desired.tx_queues; 2800 else 2801 adapter->req_tx_queues = 2802 adapter->opt_tx_comp_sub_queues; 2803 2804 if (adapter->desired.rx_queues) 2805 adapter->req_rx_queues = 2806 adapter->desired.rx_queues; 2807 else 2808 adapter->req_rx_queues = 2809 adapter->opt_rx_comp_queues; 2810 2811 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2812 } 2813 2814 memset(&crq, 0, sizeof(crq)); 2815 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2816 crq.request_capability.cmd = REQUEST_CAPABILITY; 2817 2818 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2819 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2820 atomic_inc(&adapter->running_cap_crqs); 2821 ibmvnic_send_crq(adapter, &crq); 2822 2823 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2824 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2825 atomic_inc(&adapter->running_cap_crqs); 2826 ibmvnic_send_crq(adapter, &crq); 2827 2828 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2829 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2830 atomic_inc(&adapter->running_cap_crqs); 2831 ibmvnic_send_crq(adapter, &crq); 2832 2833 crq.request_capability.capability = 2834 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2835 crq.request_capability.number = 2836 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2837 atomic_inc(&adapter->running_cap_crqs); 2838 ibmvnic_send_crq(adapter, &crq); 2839 2840 crq.request_capability.capability = 2841 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2842 crq.request_capability.number = 2843 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2844 atomic_inc(&adapter->running_cap_crqs); 2845 ibmvnic_send_crq(adapter, &crq); 2846 2847 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2848 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2849 atomic_inc(&adapter->running_cap_crqs); 2850 ibmvnic_send_crq(adapter, &crq); 2851 2852 if (adapter->netdev->flags & IFF_PROMISC) { 2853 if (adapter->promisc_supported) { 2854 crq.request_capability.capability = 2855 cpu_to_be16(PROMISC_REQUESTED); 2856 crq.request_capability.number = cpu_to_be64(1); 2857 atomic_inc(&adapter->running_cap_crqs); 2858 ibmvnic_send_crq(adapter, &crq); 2859 } 2860 } else { 2861 crq.request_capability.capability = 2862 cpu_to_be16(PROMISC_REQUESTED); 2863 crq.request_capability.number = cpu_to_be64(0); 2864 atomic_inc(&adapter->running_cap_crqs); 2865 ibmvnic_send_crq(adapter, &crq); 2866 } 2867 } 2868 2869 static int pending_scrq(struct ibmvnic_adapter *adapter, 2870 struct ibmvnic_sub_crq_queue *scrq) 2871 { 2872 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2873 2874 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2875 return 1; 2876 else 2877 return 0; 2878 } 2879 2880 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2881 struct ibmvnic_sub_crq_queue *scrq) 2882 { 2883 union sub_crq *entry; 2884 unsigned long flags; 2885 2886 spin_lock_irqsave(&scrq->lock, flags); 2887 entry = &scrq->msgs[scrq->cur]; 2888 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2889 if (++scrq->cur == scrq->size) 2890 scrq->cur = 0; 2891 } else { 2892 entry = NULL; 2893 } 2894 spin_unlock_irqrestore(&scrq->lock, flags); 2895 2896 return entry; 2897 } 2898 2899 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2900 { 2901 struct ibmvnic_crq_queue *queue = &adapter->crq; 2902 union ibmvnic_crq *crq; 2903 2904 crq = &queue->msgs[queue->cur]; 2905 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2906 if (++queue->cur == queue->size) 2907 queue->cur = 0; 2908 } else { 2909 crq = NULL; 2910 } 2911 2912 return crq; 2913 } 2914 2915 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2916 union sub_crq *sub_crq) 2917 { 2918 unsigned int ua = adapter->vdev->unit_address; 2919 struct device *dev = &adapter->vdev->dev; 2920 u64 *u64_crq = (u64 *)sub_crq; 2921 int rc; 2922 2923 netdev_dbg(adapter->netdev, 2924 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2925 (unsigned long int)cpu_to_be64(remote_handle), 2926 (unsigned long int)cpu_to_be64(u64_crq[0]), 2927 (unsigned long int)cpu_to_be64(u64_crq[1]), 2928 (unsigned long int)cpu_to_be64(u64_crq[2]), 2929 (unsigned long int)cpu_to_be64(u64_crq[3])); 2930 2931 /* Make sure the hypervisor sees the complete request */ 2932 mb(); 2933 2934 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2935 cpu_to_be64(remote_handle), 2936 cpu_to_be64(u64_crq[0]), 2937 cpu_to_be64(u64_crq[1]), 2938 cpu_to_be64(u64_crq[2]), 2939 cpu_to_be64(u64_crq[3])); 2940 2941 if (rc) { 2942 if (rc == H_CLOSED) 2943 dev_warn(dev, "CRQ Queue closed\n"); 2944 dev_err(dev, "Send error (rc=%d)\n", rc); 2945 } 2946 2947 return rc; 2948 } 2949 2950 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2951 u64 remote_handle, u64 ioba, u64 num_entries) 2952 { 2953 unsigned int ua = adapter->vdev->unit_address; 2954 struct device *dev = &adapter->vdev->dev; 2955 int rc; 2956 2957 /* Make sure the hypervisor sees the complete request */ 2958 mb(); 2959 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2960 cpu_to_be64(remote_handle), 2961 ioba, num_entries); 2962 2963 if (rc) { 2964 if (rc == H_CLOSED) 2965 dev_warn(dev, "CRQ Queue closed\n"); 2966 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2967 } 2968 2969 return rc; 2970 } 2971 2972 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2973 union ibmvnic_crq *crq) 2974 { 2975 unsigned int ua = adapter->vdev->unit_address; 2976 struct device *dev = &adapter->vdev->dev; 2977 u64 *u64_crq = (u64 *)crq; 2978 int rc; 2979 2980 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2981 (unsigned long int)cpu_to_be64(u64_crq[0]), 2982 (unsigned long int)cpu_to_be64(u64_crq[1])); 2983 2984 /* Make sure the hypervisor sees the complete request */ 2985 mb(); 2986 2987 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2988 cpu_to_be64(u64_crq[0]), 2989 cpu_to_be64(u64_crq[1])); 2990 2991 if (rc) { 2992 if (rc == H_CLOSED) { 2993 dev_warn(dev, "CRQ Queue closed\n"); 2994 if (adapter->resetting) 2995 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2996 } 2997 2998 dev_warn(dev, "Send error (rc=%d)\n", rc); 2999 } 3000 3001 return rc; 3002 } 3003 3004 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3005 { 3006 union ibmvnic_crq crq; 3007 3008 memset(&crq, 0, sizeof(crq)); 3009 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3010 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3011 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3012 3013 return ibmvnic_send_crq(adapter, &crq); 3014 } 3015 3016 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3017 { 3018 union ibmvnic_crq crq; 3019 3020 memset(&crq, 0, sizeof(crq)); 3021 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3022 crq.version_exchange.cmd = VERSION_EXCHANGE; 3023 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3024 3025 return ibmvnic_send_crq(adapter, &crq); 3026 } 3027 3028 struct vnic_login_client_data { 3029 u8 type; 3030 __be16 len; 3031 char name; 3032 } __packed; 3033 3034 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3035 { 3036 int len; 3037 3038 /* Calculate the amount of buffer space needed for the 3039 * vnic client data in the login buffer. There are four entries, 3040 * OS name, LPAR name, device name, and a null last entry. 3041 */ 3042 len = 4 * sizeof(struct vnic_login_client_data); 3043 len += 6; /* "Linux" plus NULL */ 3044 len += strlen(utsname()->nodename) + 1; 3045 len += strlen(adapter->netdev->name) + 1; 3046 3047 return len; 3048 } 3049 3050 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3051 struct vnic_login_client_data *vlcd) 3052 { 3053 const char *os_name = "Linux"; 3054 int len; 3055 3056 /* Type 1 - LPAR OS */ 3057 vlcd->type = 1; 3058 len = strlen(os_name) + 1; 3059 vlcd->len = cpu_to_be16(len); 3060 strncpy(&vlcd->name, os_name, len); 3061 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3062 3063 /* Type 2 - LPAR name */ 3064 vlcd->type = 2; 3065 len = strlen(utsname()->nodename) + 1; 3066 vlcd->len = cpu_to_be16(len); 3067 strncpy(&vlcd->name, utsname()->nodename, len); 3068 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3069 3070 /* Type 3 - device name */ 3071 vlcd->type = 3; 3072 len = strlen(adapter->netdev->name) + 1; 3073 vlcd->len = cpu_to_be16(len); 3074 strncpy(&vlcd->name, adapter->netdev->name, len); 3075 } 3076 3077 static void send_login(struct ibmvnic_adapter *adapter) 3078 { 3079 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3080 struct ibmvnic_login_buffer *login_buffer; 3081 struct device *dev = &adapter->vdev->dev; 3082 dma_addr_t rsp_buffer_token; 3083 dma_addr_t buffer_token; 3084 size_t rsp_buffer_size; 3085 union ibmvnic_crq crq; 3086 size_t buffer_size; 3087 __be64 *tx_list_p; 3088 __be64 *rx_list_p; 3089 int client_data_len; 3090 struct vnic_login_client_data *vlcd; 3091 int i; 3092 3093 release_login_rsp_buffer(adapter); 3094 client_data_len = vnic_client_data_len(adapter); 3095 3096 buffer_size = 3097 sizeof(struct ibmvnic_login_buffer) + 3098 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3099 client_data_len; 3100 3101 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3102 if (!login_buffer) 3103 goto buf_alloc_failed; 3104 3105 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3106 DMA_TO_DEVICE); 3107 if (dma_mapping_error(dev, buffer_token)) { 3108 dev_err(dev, "Couldn't map login buffer\n"); 3109 goto buf_map_failed; 3110 } 3111 3112 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3113 sizeof(u64) * adapter->req_tx_queues + 3114 sizeof(u64) * adapter->req_rx_queues + 3115 sizeof(u64) * adapter->req_rx_queues + 3116 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3117 3118 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3119 if (!login_rsp_buffer) 3120 goto buf_rsp_alloc_failed; 3121 3122 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3123 rsp_buffer_size, DMA_FROM_DEVICE); 3124 if (dma_mapping_error(dev, rsp_buffer_token)) { 3125 dev_err(dev, "Couldn't map login rsp buffer\n"); 3126 goto buf_rsp_map_failed; 3127 } 3128 3129 adapter->login_buf = login_buffer; 3130 adapter->login_buf_token = buffer_token; 3131 adapter->login_buf_sz = buffer_size; 3132 adapter->login_rsp_buf = login_rsp_buffer; 3133 adapter->login_rsp_buf_token = rsp_buffer_token; 3134 adapter->login_rsp_buf_sz = rsp_buffer_size; 3135 3136 login_buffer->len = cpu_to_be32(buffer_size); 3137 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3138 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3139 login_buffer->off_txcomp_subcrqs = 3140 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3141 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3142 login_buffer->off_rxcomp_subcrqs = 3143 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3144 sizeof(u64) * adapter->req_tx_queues); 3145 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3146 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3147 3148 tx_list_p = (__be64 *)((char *)login_buffer + 3149 sizeof(struct ibmvnic_login_buffer)); 3150 rx_list_p = (__be64 *)((char *)login_buffer + 3151 sizeof(struct ibmvnic_login_buffer) + 3152 sizeof(u64) * adapter->req_tx_queues); 3153 3154 for (i = 0; i < adapter->req_tx_queues; i++) { 3155 if (adapter->tx_scrq[i]) { 3156 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3157 crq_num); 3158 } 3159 } 3160 3161 for (i = 0; i < adapter->req_rx_queues; i++) { 3162 if (adapter->rx_scrq[i]) { 3163 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3164 crq_num); 3165 } 3166 } 3167 3168 /* Insert vNIC login client data */ 3169 vlcd = (struct vnic_login_client_data *) 3170 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3171 login_buffer->client_data_offset = 3172 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3173 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3174 3175 vnic_add_client_data(adapter, vlcd); 3176 3177 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3178 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3179 netdev_dbg(adapter->netdev, "%016lx\n", 3180 ((unsigned long int *)(adapter->login_buf))[i]); 3181 } 3182 3183 memset(&crq, 0, sizeof(crq)); 3184 crq.login.first = IBMVNIC_CRQ_CMD; 3185 crq.login.cmd = LOGIN; 3186 crq.login.ioba = cpu_to_be32(buffer_token); 3187 crq.login.len = cpu_to_be32(buffer_size); 3188 ibmvnic_send_crq(adapter, &crq); 3189 3190 return; 3191 3192 buf_rsp_map_failed: 3193 kfree(login_rsp_buffer); 3194 buf_rsp_alloc_failed: 3195 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3196 buf_map_failed: 3197 kfree(login_buffer); 3198 buf_alloc_failed: 3199 return; 3200 } 3201 3202 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3203 u32 len, u8 map_id) 3204 { 3205 union ibmvnic_crq crq; 3206 3207 memset(&crq, 0, sizeof(crq)); 3208 crq.request_map.first = IBMVNIC_CRQ_CMD; 3209 crq.request_map.cmd = REQUEST_MAP; 3210 crq.request_map.map_id = map_id; 3211 crq.request_map.ioba = cpu_to_be32(addr); 3212 crq.request_map.len = cpu_to_be32(len); 3213 ibmvnic_send_crq(adapter, &crq); 3214 } 3215 3216 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3217 { 3218 union ibmvnic_crq crq; 3219 3220 memset(&crq, 0, sizeof(crq)); 3221 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3222 crq.request_unmap.cmd = REQUEST_UNMAP; 3223 crq.request_unmap.map_id = map_id; 3224 ibmvnic_send_crq(adapter, &crq); 3225 } 3226 3227 static void send_map_query(struct ibmvnic_adapter *adapter) 3228 { 3229 union ibmvnic_crq crq; 3230 3231 memset(&crq, 0, sizeof(crq)); 3232 crq.query_map.first = IBMVNIC_CRQ_CMD; 3233 crq.query_map.cmd = QUERY_MAP; 3234 ibmvnic_send_crq(adapter, &crq); 3235 } 3236 3237 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3238 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3239 { 3240 union ibmvnic_crq crq; 3241 3242 atomic_set(&adapter->running_cap_crqs, 0); 3243 memset(&crq, 0, sizeof(crq)); 3244 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3245 crq.query_capability.cmd = QUERY_CAPABILITY; 3246 3247 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3248 atomic_inc(&adapter->running_cap_crqs); 3249 ibmvnic_send_crq(adapter, &crq); 3250 3251 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3252 atomic_inc(&adapter->running_cap_crqs); 3253 ibmvnic_send_crq(adapter, &crq); 3254 3255 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3256 atomic_inc(&adapter->running_cap_crqs); 3257 ibmvnic_send_crq(adapter, &crq); 3258 3259 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3260 atomic_inc(&adapter->running_cap_crqs); 3261 ibmvnic_send_crq(adapter, &crq); 3262 3263 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3264 atomic_inc(&adapter->running_cap_crqs); 3265 ibmvnic_send_crq(adapter, &crq); 3266 3267 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3268 atomic_inc(&adapter->running_cap_crqs); 3269 ibmvnic_send_crq(adapter, &crq); 3270 3271 crq.query_capability.capability = 3272 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3273 atomic_inc(&adapter->running_cap_crqs); 3274 ibmvnic_send_crq(adapter, &crq); 3275 3276 crq.query_capability.capability = 3277 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3278 atomic_inc(&adapter->running_cap_crqs); 3279 ibmvnic_send_crq(adapter, &crq); 3280 3281 crq.query_capability.capability = 3282 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3283 atomic_inc(&adapter->running_cap_crqs); 3284 ibmvnic_send_crq(adapter, &crq); 3285 3286 crq.query_capability.capability = 3287 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3288 atomic_inc(&adapter->running_cap_crqs); 3289 ibmvnic_send_crq(adapter, &crq); 3290 3291 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3292 atomic_inc(&adapter->running_cap_crqs); 3293 ibmvnic_send_crq(adapter, &crq); 3294 3295 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3296 atomic_inc(&adapter->running_cap_crqs); 3297 ibmvnic_send_crq(adapter, &crq); 3298 3299 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3300 atomic_inc(&adapter->running_cap_crqs); 3301 ibmvnic_send_crq(adapter, &crq); 3302 3303 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3304 atomic_inc(&adapter->running_cap_crqs); 3305 ibmvnic_send_crq(adapter, &crq); 3306 3307 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3308 atomic_inc(&adapter->running_cap_crqs); 3309 ibmvnic_send_crq(adapter, &crq); 3310 3311 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3312 atomic_inc(&adapter->running_cap_crqs); 3313 ibmvnic_send_crq(adapter, &crq); 3314 3315 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3316 atomic_inc(&adapter->running_cap_crqs); 3317 ibmvnic_send_crq(adapter, &crq); 3318 3319 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3320 atomic_inc(&adapter->running_cap_crqs); 3321 ibmvnic_send_crq(adapter, &crq); 3322 3323 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3324 atomic_inc(&adapter->running_cap_crqs); 3325 ibmvnic_send_crq(adapter, &crq); 3326 3327 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3328 atomic_inc(&adapter->running_cap_crqs); 3329 ibmvnic_send_crq(adapter, &crq); 3330 3331 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3332 atomic_inc(&adapter->running_cap_crqs); 3333 ibmvnic_send_crq(adapter, &crq); 3334 3335 crq.query_capability.capability = 3336 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3337 atomic_inc(&adapter->running_cap_crqs); 3338 ibmvnic_send_crq(adapter, &crq); 3339 3340 crq.query_capability.capability = 3341 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3342 atomic_inc(&adapter->running_cap_crqs); 3343 ibmvnic_send_crq(adapter, &crq); 3344 3345 crq.query_capability.capability = 3346 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3347 atomic_inc(&adapter->running_cap_crqs); 3348 ibmvnic_send_crq(adapter, &crq); 3349 3350 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3351 atomic_inc(&adapter->running_cap_crqs); 3352 ibmvnic_send_crq(adapter, &crq); 3353 } 3354 3355 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3356 struct ibmvnic_adapter *adapter) 3357 { 3358 struct device *dev = &adapter->vdev->dev; 3359 3360 if (crq->get_vpd_size_rsp.rc.code) { 3361 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3362 crq->get_vpd_size_rsp.rc.code); 3363 complete(&adapter->fw_done); 3364 return; 3365 } 3366 3367 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3368 complete(&adapter->fw_done); 3369 } 3370 3371 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3372 struct ibmvnic_adapter *adapter) 3373 { 3374 struct device *dev = &adapter->vdev->dev; 3375 unsigned char *substr = NULL; 3376 u8 fw_level_len = 0; 3377 3378 memset(adapter->fw_version, 0, 32); 3379 3380 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3381 DMA_FROM_DEVICE); 3382 3383 if (crq->get_vpd_rsp.rc.code) { 3384 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3385 crq->get_vpd_rsp.rc.code); 3386 goto complete; 3387 } 3388 3389 /* get the position of the firmware version info 3390 * located after the ASCII 'RM' substring in the buffer 3391 */ 3392 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3393 if (!substr) { 3394 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3395 goto complete; 3396 } 3397 3398 /* get length of firmware level ASCII substring */ 3399 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3400 fw_level_len = *(substr + 2); 3401 } else { 3402 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3403 goto complete; 3404 } 3405 3406 /* copy firmware version string from vpd into adapter */ 3407 if ((substr + 3 + fw_level_len) < 3408 (adapter->vpd->buff + adapter->vpd->len)) { 3409 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3410 } else { 3411 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3412 } 3413 3414 complete: 3415 if (adapter->fw_version[0] == '\0') 3416 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3417 complete(&adapter->fw_done); 3418 } 3419 3420 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3421 { 3422 struct device *dev = &adapter->vdev->dev; 3423 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3424 union ibmvnic_crq crq; 3425 int i; 3426 3427 dma_unmap_single(dev, adapter->ip_offload_tok, 3428 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3429 3430 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3431 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3432 netdev_dbg(adapter->netdev, "%016lx\n", 3433 ((unsigned long int *)(buf))[i]); 3434 3435 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3436 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3437 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3438 buf->tcp_ipv4_chksum); 3439 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3440 buf->tcp_ipv6_chksum); 3441 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3442 buf->udp_ipv4_chksum); 3443 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3444 buf->udp_ipv6_chksum); 3445 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3446 buf->large_tx_ipv4); 3447 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3448 buf->large_tx_ipv6); 3449 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3450 buf->large_rx_ipv4); 3451 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3452 buf->large_rx_ipv6); 3453 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3454 buf->max_ipv4_header_size); 3455 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3456 buf->max_ipv6_header_size); 3457 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3458 buf->max_tcp_header_size); 3459 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3460 buf->max_udp_header_size); 3461 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3462 buf->max_large_tx_size); 3463 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3464 buf->max_large_rx_size); 3465 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3466 buf->ipv6_extension_header); 3467 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3468 buf->tcp_pseudosum_req); 3469 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3470 buf->num_ipv6_ext_headers); 3471 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3472 buf->off_ipv6_ext_headers); 3473 3474 adapter->ip_offload_ctrl_tok = 3475 dma_map_single(dev, &adapter->ip_offload_ctrl, 3476 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3477 3478 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3479 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3480 return; 3481 } 3482 3483 adapter->ip_offload_ctrl.len = 3484 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3485 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3486 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3487 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3488 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3489 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3490 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3491 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3492 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3493 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3494 3495 /* large_rx disabled for now, additional features needed */ 3496 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3497 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3498 3499 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3500 3501 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3502 adapter->netdev->features |= NETIF_F_IP_CSUM; 3503 3504 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3505 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3506 3507 if ((adapter->netdev->features & 3508 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3509 adapter->netdev->features |= NETIF_F_RXCSUM; 3510 3511 if (buf->large_tx_ipv4) 3512 adapter->netdev->features |= NETIF_F_TSO; 3513 if (buf->large_tx_ipv6) 3514 adapter->netdev->features |= NETIF_F_TSO6; 3515 3516 adapter->netdev->hw_features |= adapter->netdev->features; 3517 3518 memset(&crq, 0, sizeof(crq)); 3519 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3520 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3521 crq.control_ip_offload.len = 3522 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3523 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3524 ibmvnic_send_crq(adapter, &crq); 3525 } 3526 3527 static void handle_error_info_rsp(union ibmvnic_crq *crq, 3528 struct ibmvnic_adapter *adapter) 3529 { 3530 struct device *dev = &adapter->vdev->dev; 3531 struct ibmvnic_error_buff *error_buff, *tmp; 3532 unsigned long flags; 3533 bool found = false; 3534 int i; 3535 3536 if (!crq->request_error_rsp.rc.code) { 3537 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 3538 crq->request_error_rsp.rc.code); 3539 return; 3540 } 3541 3542 spin_lock_irqsave(&adapter->error_list_lock, flags); 3543 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 3544 if (error_buff->error_id == crq->request_error_rsp.error_id) { 3545 found = true; 3546 list_del(&error_buff->list); 3547 break; 3548 } 3549 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3550 3551 if (!found) { 3552 dev_err(dev, "Couldn't find error id %x\n", 3553 be32_to_cpu(crq->request_error_rsp.error_id)); 3554 return; 3555 } 3556 3557 dev_err(dev, "Detailed info for error id %x:", 3558 be32_to_cpu(crq->request_error_rsp.error_id)); 3559 3560 for (i = 0; i < error_buff->len; i++) { 3561 pr_cont("%02x", (int)error_buff->buff[i]); 3562 if (i % 8 == 7) 3563 pr_cont(" "); 3564 } 3565 pr_cont("\n"); 3566 3567 dma_unmap_single(dev, error_buff->dma, error_buff->len, 3568 DMA_FROM_DEVICE); 3569 kfree(error_buff->buff); 3570 kfree(error_buff); 3571 } 3572 3573 static void request_error_information(struct ibmvnic_adapter *adapter, 3574 union ibmvnic_crq *err_crq) 3575 { 3576 struct device *dev = &adapter->vdev->dev; 3577 struct net_device *netdev = adapter->netdev; 3578 struct ibmvnic_error_buff *error_buff; 3579 unsigned long timeout = msecs_to_jiffies(30000); 3580 union ibmvnic_crq crq; 3581 unsigned long flags; 3582 int rc, detail_len; 3583 3584 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 3585 if (!error_buff) 3586 return; 3587 3588 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 3589 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 3590 if (!error_buff->buff) { 3591 kfree(error_buff); 3592 return; 3593 } 3594 3595 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 3596 DMA_FROM_DEVICE); 3597 if (dma_mapping_error(dev, error_buff->dma)) { 3598 netdev_err(netdev, "Couldn't map error buffer\n"); 3599 kfree(error_buff->buff); 3600 kfree(error_buff); 3601 return; 3602 } 3603 3604 error_buff->len = detail_len; 3605 error_buff->error_id = err_crq->error_indication.error_id; 3606 3607 spin_lock_irqsave(&adapter->error_list_lock, flags); 3608 list_add_tail(&error_buff->list, &adapter->errors); 3609 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3610 3611 memset(&crq, 0, sizeof(crq)); 3612 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 3613 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 3614 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 3615 crq.request_error_info.len = cpu_to_be32(detail_len); 3616 crq.request_error_info.error_id = err_crq->error_indication.error_id; 3617 3618 rc = ibmvnic_send_crq(adapter, &crq); 3619 if (rc) { 3620 netdev_err(netdev, "failed to request error information\n"); 3621 goto err_info_fail; 3622 } 3623 3624 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3625 netdev_err(netdev, "timeout waiting for error information\n"); 3626 goto err_info_fail; 3627 } 3628 3629 return; 3630 3631 err_info_fail: 3632 spin_lock_irqsave(&adapter->error_list_lock, flags); 3633 list_del(&error_buff->list); 3634 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3635 3636 kfree(error_buff->buff); 3637 kfree(error_buff); 3638 } 3639 3640 static void handle_error_indication(union ibmvnic_crq *crq, 3641 struct ibmvnic_adapter *adapter) 3642 { 3643 struct device *dev = &adapter->vdev->dev; 3644 3645 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 3646 crq->error_indication.flags 3647 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3648 be32_to_cpu(crq->error_indication.error_id), 3649 be16_to_cpu(crq->error_indication.error_cause)); 3650 3651 if (be32_to_cpu(crq->error_indication.error_id)) 3652 request_error_information(adapter, crq); 3653 3654 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3655 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3656 else 3657 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3658 } 3659 3660 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3661 struct ibmvnic_adapter *adapter) 3662 { 3663 struct net_device *netdev = adapter->netdev; 3664 struct device *dev = &adapter->vdev->dev; 3665 long rc; 3666 3667 rc = crq->change_mac_addr_rsp.rc.code; 3668 if (rc) { 3669 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3670 goto out; 3671 } 3672 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3673 ETH_ALEN); 3674 out: 3675 complete(&adapter->fw_done); 3676 return rc; 3677 } 3678 3679 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3680 struct ibmvnic_adapter *adapter) 3681 { 3682 struct device *dev = &adapter->vdev->dev; 3683 u64 *req_value; 3684 char *name; 3685 3686 atomic_dec(&adapter->running_cap_crqs); 3687 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3688 case REQ_TX_QUEUES: 3689 req_value = &adapter->req_tx_queues; 3690 name = "tx"; 3691 break; 3692 case REQ_RX_QUEUES: 3693 req_value = &adapter->req_rx_queues; 3694 name = "rx"; 3695 break; 3696 case REQ_RX_ADD_QUEUES: 3697 req_value = &adapter->req_rx_add_queues; 3698 name = "rx_add"; 3699 break; 3700 case REQ_TX_ENTRIES_PER_SUBCRQ: 3701 req_value = &adapter->req_tx_entries_per_subcrq; 3702 name = "tx_entries_per_subcrq"; 3703 break; 3704 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3705 req_value = &adapter->req_rx_add_entries_per_subcrq; 3706 name = "rx_add_entries_per_subcrq"; 3707 break; 3708 case REQ_MTU: 3709 req_value = &adapter->req_mtu; 3710 name = "mtu"; 3711 break; 3712 case PROMISC_REQUESTED: 3713 req_value = &adapter->promisc; 3714 name = "promisc"; 3715 break; 3716 default: 3717 dev_err(dev, "Got invalid cap request rsp %d\n", 3718 crq->request_capability.capability); 3719 return; 3720 } 3721 3722 switch (crq->request_capability_rsp.rc.code) { 3723 case SUCCESS: 3724 break; 3725 case PARTIALSUCCESS: 3726 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3727 *req_value, 3728 (long int)be64_to_cpu(crq->request_capability_rsp. 3729 number), name); 3730 3731 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3732 REQ_MTU) { 3733 pr_err("mtu of %llu is not supported. Reverting.\n", 3734 *req_value); 3735 *req_value = adapter->fallback.mtu; 3736 } else { 3737 *req_value = 3738 be64_to_cpu(crq->request_capability_rsp.number); 3739 } 3740 3741 ibmvnic_send_req_caps(adapter, 1); 3742 return; 3743 default: 3744 dev_err(dev, "Error %d in request cap rsp\n", 3745 crq->request_capability_rsp.rc.code); 3746 return; 3747 } 3748 3749 /* Done receiving requested capabilities, query IP offload support */ 3750 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3751 union ibmvnic_crq newcrq; 3752 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3753 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3754 &adapter->ip_offload_buf; 3755 3756 adapter->wait_capability = false; 3757 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3758 buf_sz, 3759 DMA_FROM_DEVICE); 3760 3761 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3762 if (!firmware_has_feature(FW_FEATURE_CMO)) 3763 dev_err(dev, "Couldn't map offload buffer\n"); 3764 return; 3765 } 3766 3767 memset(&newcrq, 0, sizeof(newcrq)); 3768 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3769 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3770 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3771 newcrq.query_ip_offload.ioba = 3772 cpu_to_be32(adapter->ip_offload_tok); 3773 3774 ibmvnic_send_crq(adapter, &newcrq); 3775 } 3776 } 3777 3778 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3779 struct ibmvnic_adapter *adapter) 3780 { 3781 struct device *dev = &adapter->vdev->dev; 3782 struct net_device *netdev = adapter->netdev; 3783 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3784 struct ibmvnic_login_buffer *login = adapter->login_buf; 3785 int i; 3786 3787 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3788 DMA_BIDIRECTIONAL); 3789 release_login_buffer(adapter); 3790 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3791 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3792 3793 /* If the number of queues requested can't be allocated by the 3794 * server, the login response will return with code 1. We will need 3795 * to resend the login buffer with fewer queues requested. 3796 */ 3797 if (login_rsp_crq->generic.rc.code) { 3798 adapter->renegotiate = true; 3799 complete(&adapter->init_done); 3800 return 0; 3801 } 3802 3803 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3804 3805 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3806 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3807 netdev_dbg(adapter->netdev, "%016lx\n", 3808 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3809 } 3810 3811 /* Sanity checks */ 3812 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3813 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3814 adapter->req_rx_add_queues != 3815 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3816 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3817 ibmvnic_remove(adapter->vdev); 3818 return -EIO; 3819 } 3820 complete(&adapter->init_done); 3821 3822 return 0; 3823 } 3824 3825 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3826 struct ibmvnic_adapter *adapter) 3827 { 3828 struct device *dev = &adapter->vdev->dev; 3829 long rc; 3830 3831 rc = crq->request_unmap_rsp.rc.code; 3832 if (rc) 3833 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3834 } 3835 3836 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3837 struct ibmvnic_adapter *adapter) 3838 { 3839 struct net_device *netdev = adapter->netdev; 3840 struct device *dev = &adapter->vdev->dev; 3841 long rc; 3842 3843 rc = crq->query_map_rsp.rc.code; 3844 if (rc) { 3845 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3846 return; 3847 } 3848 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3849 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3850 crq->query_map_rsp.free_pages); 3851 } 3852 3853 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3854 struct ibmvnic_adapter *adapter) 3855 { 3856 struct net_device *netdev = adapter->netdev; 3857 struct device *dev = &adapter->vdev->dev; 3858 long rc; 3859 3860 atomic_dec(&adapter->running_cap_crqs); 3861 netdev_dbg(netdev, "Outstanding queries: %d\n", 3862 atomic_read(&adapter->running_cap_crqs)); 3863 rc = crq->query_capability.rc.code; 3864 if (rc) { 3865 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3866 goto out; 3867 } 3868 3869 switch (be16_to_cpu(crq->query_capability.capability)) { 3870 case MIN_TX_QUEUES: 3871 adapter->min_tx_queues = 3872 be64_to_cpu(crq->query_capability.number); 3873 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3874 adapter->min_tx_queues); 3875 break; 3876 case MIN_RX_QUEUES: 3877 adapter->min_rx_queues = 3878 be64_to_cpu(crq->query_capability.number); 3879 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3880 adapter->min_rx_queues); 3881 break; 3882 case MIN_RX_ADD_QUEUES: 3883 adapter->min_rx_add_queues = 3884 be64_to_cpu(crq->query_capability.number); 3885 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3886 adapter->min_rx_add_queues); 3887 break; 3888 case MAX_TX_QUEUES: 3889 adapter->max_tx_queues = 3890 be64_to_cpu(crq->query_capability.number); 3891 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3892 adapter->max_tx_queues); 3893 break; 3894 case MAX_RX_QUEUES: 3895 adapter->max_rx_queues = 3896 be64_to_cpu(crq->query_capability.number); 3897 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3898 adapter->max_rx_queues); 3899 break; 3900 case MAX_RX_ADD_QUEUES: 3901 adapter->max_rx_add_queues = 3902 be64_to_cpu(crq->query_capability.number); 3903 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3904 adapter->max_rx_add_queues); 3905 break; 3906 case MIN_TX_ENTRIES_PER_SUBCRQ: 3907 adapter->min_tx_entries_per_subcrq = 3908 be64_to_cpu(crq->query_capability.number); 3909 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3910 adapter->min_tx_entries_per_subcrq); 3911 break; 3912 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3913 adapter->min_rx_add_entries_per_subcrq = 3914 be64_to_cpu(crq->query_capability.number); 3915 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3916 adapter->min_rx_add_entries_per_subcrq); 3917 break; 3918 case MAX_TX_ENTRIES_PER_SUBCRQ: 3919 adapter->max_tx_entries_per_subcrq = 3920 be64_to_cpu(crq->query_capability.number); 3921 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3922 adapter->max_tx_entries_per_subcrq); 3923 break; 3924 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3925 adapter->max_rx_add_entries_per_subcrq = 3926 be64_to_cpu(crq->query_capability.number); 3927 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3928 adapter->max_rx_add_entries_per_subcrq); 3929 break; 3930 case TCP_IP_OFFLOAD: 3931 adapter->tcp_ip_offload = 3932 be64_to_cpu(crq->query_capability.number); 3933 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3934 adapter->tcp_ip_offload); 3935 break; 3936 case PROMISC_SUPPORTED: 3937 adapter->promisc_supported = 3938 be64_to_cpu(crq->query_capability.number); 3939 netdev_dbg(netdev, "promisc_supported = %lld\n", 3940 adapter->promisc_supported); 3941 break; 3942 case MIN_MTU: 3943 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3944 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3945 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3946 break; 3947 case MAX_MTU: 3948 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3949 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3950 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3951 break; 3952 case MAX_MULTICAST_FILTERS: 3953 adapter->max_multicast_filters = 3954 be64_to_cpu(crq->query_capability.number); 3955 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3956 adapter->max_multicast_filters); 3957 break; 3958 case VLAN_HEADER_INSERTION: 3959 adapter->vlan_header_insertion = 3960 be64_to_cpu(crq->query_capability.number); 3961 if (adapter->vlan_header_insertion) 3962 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3963 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3964 adapter->vlan_header_insertion); 3965 break; 3966 case RX_VLAN_HEADER_INSERTION: 3967 adapter->rx_vlan_header_insertion = 3968 be64_to_cpu(crq->query_capability.number); 3969 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3970 adapter->rx_vlan_header_insertion); 3971 break; 3972 case MAX_TX_SG_ENTRIES: 3973 adapter->max_tx_sg_entries = 3974 be64_to_cpu(crq->query_capability.number); 3975 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3976 adapter->max_tx_sg_entries); 3977 break; 3978 case RX_SG_SUPPORTED: 3979 adapter->rx_sg_supported = 3980 be64_to_cpu(crq->query_capability.number); 3981 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3982 adapter->rx_sg_supported); 3983 break; 3984 case OPT_TX_COMP_SUB_QUEUES: 3985 adapter->opt_tx_comp_sub_queues = 3986 be64_to_cpu(crq->query_capability.number); 3987 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3988 adapter->opt_tx_comp_sub_queues); 3989 break; 3990 case OPT_RX_COMP_QUEUES: 3991 adapter->opt_rx_comp_queues = 3992 be64_to_cpu(crq->query_capability.number); 3993 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3994 adapter->opt_rx_comp_queues); 3995 break; 3996 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3997 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3998 be64_to_cpu(crq->query_capability.number); 3999 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4000 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4001 break; 4002 case OPT_TX_ENTRIES_PER_SUBCRQ: 4003 adapter->opt_tx_entries_per_subcrq = 4004 be64_to_cpu(crq->query_capability.number); 4005 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4006 adapter->opt_tx_entries_per_subcrq); 4007 break; 4008 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4009 adapter->opt_rxba_entries_per_subcrq = 4010 be64_to_cpu(crq->query_capability.number); 4011 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4012 adapter->opt_rxba_entries_per_subcrq); 4013 break; 4014 case TX_RX_DESC_REQ: 4015 adapter->tx_rx_desc_req = crq->query_capability.number; 4016 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4017 adapter->tx_rx_desc_req); 4018 break; 4019 4020 default: 4021 netdev_err(netdev, "Got invalid cap rsp %d\n", 4022 crq->query_capability.capability); 4023 } 4024 4025 out: 4026 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4027 adapter->wait_capability = false; 4028 ibmvnic_send_req_caps(adapter, 0); 4029 } 4030 } 4031 4032 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4033 struct ibmvnic_adapter *adapter) 4034 { 4035 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4036 struct net_device *netdev = adapter->netdev; 4037 struct device *dev = &adapter->vdev->dev; 4038 u64 *u64_crq = (u64 *)crq; 4039 long rc; 4040 4041 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4042 (unsigned long int)cpu_to_be64(u64_crq[0]), 4043 (unsigned long int)cpu_to_be64(u64_crq[1])); 4044 switch (gen_crq->first) { 4045 case IBMVNIC_CRQ_INIT_RSP: 4046 switch (gen_crq->cmd) { 4047 case IBMVNIC_CRQ_INIT: 4048 dev_info(dev, "Partner initialized\n"); 4049 adapter->from_passive_init = true; 4050 complete(&adapter->init_done); 4051 break; 4052 case IBMVNIC_CRQ_INIT_COMPLETE: 4053 dev_info(dev, "Partner initialization complete\n"); 4054 send_version_xchg(adapter); 4055 break; 4056 default: 4057 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4058 } 4059 return; 4060 case IBMVNIC_CRQ_XPORT_EVENT: 4061 netif_carrier_off(netdev); 4062 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4063 dev_info(dev, "Migrated, re-enabling adapter\n"); 4064 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4065 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4066 dev_info(dev, "Backing device failover detected\n"); 4067 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4068 } else { 4069 /* The adapter lost the connection */ 4070 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4071 gen_crq->cmd); 4072 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4073 } 4074 return; 4075 case IBMVNIC_CRQ_CMD_RSP: 4076 break; 4077 default: 4078 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4079 gen_crq->first); 4080 return; 4081 } 4082 4083 switch (gen_crq->cmd) { 4084 case VERSION_EXCHANGE_RSP: 4085 rc = crq->version_exchange_rsp.rc.code; 4086 if (rc) { 4087 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4088 break; 4089 } 4090 dev_info(dev, "Partner protocol version is %d\n", 4091 crq->version_exchange_rsp.version); 4092 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4093 ibmvnic_version) 4094 ibmvnic_version = 4095 be16_to_cpu(crq->version_exchange_rsp.version); 4096 send_cap_queries(adapter); 4097 break; 4098 case QUERY_CAPABILITY_RSP: 4099 handle_query_cap_rsp(crq, adapter); 4100 break; 4101 case QUERY_MAP_RSP: 4102 handle_query_map_rsp(crq, adapter); 4103 break; 4104 case REQUEST_MAP_RSP: 4105 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4106 complete(&adapter->fw_done); 4107 break; 4108 case REQUEST_UNMAP_RSP: 4109 handle_request_unmap_rsp(crq, adapter); 4110 break; 4111 case REQUEST_CAPABILITY_RSP: 4112 handle_request_cap_rsp(crq, adapter); 4113 break; 4114 case LOGIN_RSP: 4115 netdev_dbg(netdev, "Got Login Response\n"); 4116 handle_login_rsp(crq, adapter); 4117 break; 4118 case LOGICAL_LINK_STATE_RSP: 4119 netdev_dbg(netdev, 4120 "Got Logical Link State Response, state: %d rc: %d\n", 4121 crq->logical_link_state_rsp.link_state, 4122 crq->logical_link_state_rsp.rc.code); 4123 adapter->logical_link_state = 4124 crq->logical_link_state_rsp.link_state; 4125 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4126 complete(&adapter->init_done); 4127 break; 4128 case LINK_STATE_INDICATION: 4129 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4130 adapter->phys_link_state = 4131 crq->link_state_indication.phys_link_state; 4132 adapter->logical_link_state = 4133 crq->link_state_indication.logical_link_state; 4134 break; 4135 case CHANGE_MAC_ADDR_RSP: 4136 netdev_dbg(netdev, "Got MAC address change Response\n"); 4137 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4138 break; 4139 case ERROR_INDICATION: 4140 netdev_dbg(netdev, "Got Error Indication\n"); 4141 handle_error_indication(crq, adapter); 4142 break; 4143 case REQUEST_ERROR_RSP: 4144 netdev_dbg(netdev, "Got Error Detail Response\n"); 4145 handle_error_info_rsp(crq, adapter); 4146 break; 4147 case REQUEST_STATISTICS_RSP: 4148 netdev_dbg(netdev, "Got Statistics Response\n"); 4149 complete(&adapter->stats_done); 4150 break; 4151 case QUERY_IP_OFFLOAD_RSP: 4152 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4153 handle_query_ip_offload_rsp(adapter); 4154 break; 4155 case MULTICAST_CTRL_RSP: 4156 netdev_dbg(netdev, "Got multicast control Response\n"); 4157 break; 4158 case CONTROL_IP_OFFLOAD_RSP: 4159 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4160 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4161 sizeof(adapter->ip_offload_ctrl), 4162 DMA_TO_DEVICE); 4163 complete(&adapter->init_done); 4164 break; 4165 case COLLECT_FW_TRACE_RSP: 4166 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4167 complete(&adapter->fw_done); 4168 break; 4169 case GET_VPD_SIZE_RSP: 4170 handle_vpd_size_rsp(crq, adapter); 4171 break; 4172 case GET_VPD_RSP: 4173 handle_vpd_rsp(crq, adapter); 4174 break; 4175 default: 4176 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4177 gen_crq->cmd); 4178 } 4179 } 4180 4181 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4182 { 4183 struct ibmvnic_adapter *adapter = instance; 4184 4185 tasklet_schedule(&adapter->tasklet); 4186 return IRQ_HANDLED; 4187 } 4188 4189 static void ibmvnic_tasklet(void *data) 4190 { 4191 struct ibmvnic_adapter *adapter = data; 4192 struct ibmvnic_crq_queue *queue = &adapter->crq; 4193 union ibmvnic_crq *crq; 4194 unsigned long flags; 4195 bool done = false; 4196 4197 spin_lock_irqsave(&queue->lock, flags); 4198 while (!done) { 4199 /* Pull all the valid messages off the CRQ */ 4200 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4201 ibmvnic_handle_crq(crq, adapter); 4202 crq->generic.first = 0; 4203 } 4204 4205 /* remain in tasklet until all 4206 * capabilities responses are received 4207 */ 4208 if (!adapter->wait_capability) 4209 done = true; 4210 } 4211 /* if capabilities CRQ's were sent in this tasklet, the following 4212 * tasklet must wait until all responses are received 4213 */ 4214 if (atomic_read(&adapter->running_cap_crqs) != 0) 4215 adapter->wait_capability = true; 4216 spin_unlock_irqrestore(&queue->lock, flags); 4217 } 4218 4219 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4220 { 4221 struct vio_dev *vdev = adapter->vdev; 4222 int rc; 4223 4224 do { 4225 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4226 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4227 4228 if (rc) 4229 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4230 4231 return rc; 4232 } 4233 4234 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4235 { 4236 struct ibmvnic_crq_queue *crq = &adapter->crq; 4237 struct device *dev = &adapter->vdev->dev; 4238 struct vio_dev *vdev = adapter->vdev; 4239 int rc; 4240 4241 /* Close the CRQ */ 4242 do { 4243 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4244 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4245 4246 /* Clean out the queue */ 4247 memset(crq->msgs, 0, PAGE_SIZE); 4248 crq->cur = 0; 4249 4250 /* And re-open it again */ 4251 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4252 crq->msg_token, PAGE_SIZE); 4253 4254 if (rc == H_CLOSED) 4255 /* Adapter is good, but other end is not ready */ 4256 dev_warn(dev, "Partner adapter not ready\n"); 4257 else if (rc != 0) 4258 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4259 4260 return rc; 4261 } 4262 4263 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4264 { 4265 struct ibmvnic_crq_queue *crq = &adapter->crq; 4266 struct vio_dev *vdev = adapter->vdev; 4267 long rc; 4268 4269 if (!crq->msgs) 4270 return; 4271 4272 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4273 free_irq(vdev->irq, adapter); 4274 tasklet_kill(&adapter->tasklet); 4275 do { 4276 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4277 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4278 4279 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4280 DMA_BIDIRECTIONAL); 4281 free_page((unsigned long)crq->msgs); 4282 crq->msgs = NULL; 4283 } 4284 4285 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4286 { 4287 struct ibmvnic_crq_queue *crq = &adapter->crq; 4288 struct device *dev = &adapter->vdev->dev; 4289 struct vio_dev *vdev = adapter->vdev; 4290 int rc, retrc = -ENOMEM; 4291 4292 if (crq->msgs) 4293 return 0; 4294 4295 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4296 /* Should we allocate more than one page? */ 4297 4298 if (!crq->msgs) 4299 return -ENOMEM; 4300 4301 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4302 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4303 DMA_BIDIRECTIONAL); 4304 if (dma_mapping_error(dev, crq->msg_token)) 4305 goto map_failed; 4306 4307 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4308 crq->msg_token, PAGE_SIZE); 4309 4310 if (rc == H_RESOURCE) 4311 /* maybe kexecing and resource is busy. try a reset */ 4312 rc = ibmvnic_reset_crq(adapter); 4313 retrc = rc; 4314 4315 if (rc == H_CLOSED) { 4316 dev_warn(dev, "Partner adapter not ready\n"); 4317 } else if (rc) { 4318 dev_warn(dev, "Error %d opening adapter\n", rc); 4319 goto reg_crq_failed; 4320 } 4321 4322 retrc = 0; 4323 4324 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4325 (unsigned long)adapter); 4326 4327 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4328 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4329 adapter); 4330 if (rc) { 4331 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4332 vdev->irq, rc); 4333 goto req_irq_failed; 4334 } 4335 4336 rc = vio_enable_interrupts(vdev); 4337 if (rc) { 4338 dev_err(dev, "Error %d enabling interrupts\n", rc); 4339 goto req_irq_failed; 4340 } 4341 4342 crq->cur = 0; 4343 spin_lock_init(&crq->lock); 4344 4345 return retrc; 4346 4347 req_irq_failed: 4348 tasklet_kill(&adapter->tasklet); 4349 do { 4350 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4351 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4352 reg_crq_failed: 4353 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4354 map_failed: 4355 free_page((unsigned long)crq->msgs); 4356 crq->msgs = NULL; 4357 return retrc; 4358 } 4359 4360 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4361 { 4362 struct device *dev = &adapter->vdev->dev; 4363 unsigned long timeout = msecs_to_jiffies(30000); 4364 u64 old_num_rx_queues, old_num_tx_queues; 4365 int rc; 4366 4367 if (adapter->resetting && !adapter->wait_for_reset) { 4368 rc = ibmvnic_reset_crq(adapter); 4369 if (!rc) 4370 rc = vio_enable_interrupts(adapter->vdev); 4371 } else { 4372 rc = init_crq_queue(adapter); 4373 } 4374 4375 if (rc) { 4376 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4377 return rc; 4378 } 4379 4380 adapter->from_passive_init = false; 4381 4382 old_num_rx_queues = adapter->req_rx_queues; 4383 old_num_tx_queues = adapter->req_tx_queues; 4384 4385 init_completion(&adapter->init_done); 4386 adapter->init_done_rc = 0; 4387 ibmvnic_send_crq_init(adapter); 4388 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4389 dev_err(dev, "Initialization sequence timed out\n"); 4390 return -1; 4391 } 4392 4393 if (adapter->init_done_rc) { 4394 release_crq_queue(adapter); 4395 return adapter->init_done_rc; 4396 } 4397 4398 if (adapter->from_passive_init) { 4399 adapter->state = VNIC_OPEN; 4400 adapter->from_passive_init = false; 4401 return -1; 4402 } 4403 4404 if (adapter->resetting && !adapter->wait_for_reset) { 4405 if (adapter->req_rx_queues != old_num_rx_queues || 4406 adapter->req_tx_queues != old_num_tx_queues) { 4407 release_sub_crqs(adapter, 0); 4408 rc = init_sub_crqs(adapter); 4409 } else { 4410 rc = reset_sub_crq_queues(adapter); 4411 } 4412 } else { 4413 rc = init_sub_crqs(adapter); 4414 } 4415 4416 if (rc) { 4417 dev_err(dev, "Initialization of sub crqs failed\n"); 4418 release_crq_queue(adapter); 4419 return rc; 4420 } 4421 4422 rc = init_sub_crq_irqs(adapter); 4423 if (rc) { 4424 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4425 release_crq_queue(adapter); 4426 } 4427 4428 return rc; 4429 } 4430 4431 static struct device_attribute dev_attr_failover; 4432 4433 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4434 { 4435 struct ibmvnic_adapter *adapter; 4436 struct net_device *netdev; 4437 unsigned char *mac_addr_p; 4438 int rc; 4439 4440 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4441 dev->unit_address); 4442 4443 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4444 VETH_MAC_ADDR, NULL); 4445 if (!mac_addr_p) { 4446 dev_err(&dev->dev, 4447 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4448 __FILE__, __LINE__); 4449 return 0; 4450 } 4451 4452 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4453 IBMVNIC_MAX_QUEUES); 4454 if (!netdev) 4455 return -ENOMEM; 4456 4457 adapter = netdev_priv(netdev); 4458 adapter->state = VNIC_PROBING; 4459 dev_set_drvdata(&dev->dev, netdev); 4460 adapter->vdev = dev; 4461 adapter->netdev = netdev; 4462 4463 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4464 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4465 netdev->irq = dev->irq; 4466 netdev->netdev_ops = &ibmvnic_netdev_ops; 4467 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4468 SET_NETDEV_DEV(netdev, &dev->dev); 4469 4470 spin_lock_init(&adapter->stats_lock); 4471 4472 INIT_LIST_HEAD(&adapter->errors); 4473 spin_lock_init(&adapter->error_list_lock); 4474 4475 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4476 INIT_LIST_HEAD(&adapter->rwi_list); 4477 mutex_init(&adapter->reset_lock); 4478 mutex_init(&adapter->rwi_lock); 4479 adapter->resetting = false; 4480 4481 adapter->mac_change_pending = false; 4482 4483 do { 4484 rc = ibmvnic_init(adapter); 4485 if (rc && rc != EAGAIN) 4486 goto ibmvnic_init_fail; 4487 } while (rc == EAGAIN); 4488 4489 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4490 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4491 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4492 4493 rc = device_create_file(&dev->dev, &dev_attr_failover); 4494 if (rc) 4495 goto ibmvnic_init_fail; 4496 4497 netif_carrier_off(netdev); 4498 rc = register_netdev(netdev); 4499 if (rc) { 4500 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4501 goto ibmvnic_register_fail; 4502 } 4503 dev_info(&dev->dev, "ibmvnic registered\n"); 4504 4505 adapter->state = VNIC_PROBED; 4506 4507 adapter->wait_for_reset = false; 4508 4509 return 0; 4510 4511 ibmvnic_register_fail: 4512 device_remove_file(&dev->dev, &dev_attr_failover); 4513 4514 ibmvnic_init_fail: 4515 release_sub_crqs(adapter, 1); 4516 release_crq_queue(adapter); 4517 free_netdev(netdev); 4518 4519 return rc; 4520 } 4521 4522 static int ibmvnic_remove(struct vio_dev *dev) 4523 { 4524 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4525 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4526 4527 adapter->state = VNIC_REMOVING; 4528 unregister_netdev(netdev); 4529 mutex_lock(&adapter->reset_lock); 4530 4531 release_resources(adapter); 4532 release_sub_crqs(adapter, 1); 4533 release_crq_queue(adapter); 4534 4535 adapter->state = VNIC_REMOVED; 4536 4537 mutex_unlock(&adapter->reset_lock); 4538 device_remove_file(&dev->dev, &dev_attr_failover); 4539 free_netdev(netdev); 4540 dev_set_drvdata(&dev->dev, NULL); 4541 4542 return 0; 4543 } 4544 4545 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4546 const char *buf, size_t count) 4547 { 4548 struct net_device *netdev = dev_get_drvdata(dev); 4549 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4550 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4551 __be64 session_token; 4552 long rc; 4553 4554 if (!sysfs_streq(buf, "1")) 4555 return -EINVAL; 4556 4557 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4558 H_GET_SESSION_TOKEN, 0, 0, 0); 4559 if (rc) { 4560 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4561 rc); 4562 return -EINVAL; 4563 } 4564 4565 session_token = (__be64)retbuf[0]; 4566 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4567 be64_to_cpu(session_token)); 4568 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4569 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4570 if (rc) { 4571 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4572 rc); 4573 return -EINVAL; 4574 } 4575 4576 return count; 4577 } 4578 4579 static DEVICE_ATTR_WO(failover); 4580 4581 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4582 { 4583 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4584 struct ibmvnic_adapter *adapter; 4585 struct iommu_table *tbl; 4586 unsigned long ret = 0; 4587 int i; 4588 4589 tbl = get_iommu_table_base(&vdev->dev); 4590 4591 /* netdev inits at probe time along with the structures we need below*/ 4592 if (!netdev) 4593 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4594 4595 adapter = netdev_priv(netdev); 4596 4597 ret += PAGE_SIZE; /* the crq message queue */ 4598 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4599 4600 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4601 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4602 4603 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4604 i++) 4605 ret += adapter->rx_pool[i].size * 4606 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4607 4608 return ret; 4609 } 4610 4611 static int ibmvnic_resume(struct device *dev) 4612 { 4613 struct net_device *netdev = dev_get_drvdata(dev); 4614 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4615 4616 if (adapter->state != VNIC_OPEN) 4617 return 0; 4618 4619 tasklet_schedule(&adapter->tasklet); 4620 4621 return 0; 4622 } 4623 4624 static const struct vio_device_id ibmvnic_device_table[] = { 4625 {"network", "IBM,vnic"}, 4626 {"", "" } 4627 }; 4628 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4629 4630 static const struct dev_pm_ops ibmvnic_pm_ops = { 4631 .resume = ibmvnic_resume 4632 }; 4633 4634 static struct vio_driver ibmvnic_driver = { 4635 .id_table = ibmvnic_device_table, 4636 .probe = ibmvnic_probe, 4637 .remove = ibmvnic_remove, 4638 .get_desired_dma = ibmvnic_get_desired_dma, 4639 .name = ibmvnic_driver_name, 4640 .pm = &ibmvnic_pm_ops, 4641 }; 4642 4643 /* module functions */ 4644 static int __init ibmvnic_module_init(void) 4645 { 4646 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4647 IBMVNIC_DRIVER_VERSION); 4648 4649 return vio_register_driver(&ibmvnic_driver); 4650 } 4651 4652 static void __exit ibmvnic_module_exit(void) 4653 { 4654 vio_unregister_driver(&ibmvnic_driver); 4655 } 4656 4657 module_init(ibmvnic_module_init); 4658 module_exit(ibmvnic_module_exit); 4659