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 } else if (!rx_buff->skb) { 1924 /* free the entry */ 1925 next->rx_comp.first = 0; 1926 remove_buff_from_pool(adapter, rx_buff); 1927 continue; 1928 } 1929 1930 length = be32_to_cpu(next->rx_comp.len); 1931 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1932 flags = next->rx_comp.flags; 1933 skb = rx_buff->skb; 1934 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1935 length); 1936 1937 /* VLAN Header has been stripped by the system firmware and 1938 * needs to be inserted by the driver 1939 */ 1940 if (adapter->rx_vlan_header_insertion && 1941 (flags & IBMVNIC_VLAN_STRIPPED)) 1942 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1943 ntohs(next->rx_comp.vlan_tci)); 1944 1945 /* free the entry */ 1946 next->rx_comp.first = 0; 1947 remove_buff_from_pool(adapter, rx_buff); 1948 1949 skb_put(skb, length); 1950 skb->protocol = eth_type_trans(skb, netdev); 1951 skb_record_rx_queue(skb, scrq_num); 1952 1953 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1954 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1955 skb->ip_summed = CHECKSUM_UNNECESSARY; 1956 } 1957 1958 length = skb->len; 1959 napi_gro_receive(napi, skb); /* send it up */ 1960 netdev->stats.rx_packets++; 1961 netdev->stats.rx_bytes += length; 1962 adapter->rx_stats_buffers[scrq_num].packets++; 1963 adapter->rx_stats_buffers[scrq_num].bytes += length; 1964 frames_processed++; 1965 } 1966 1967 if (adapter->state != VNIC_CLOSING) 1968 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1969 1970 if (frames_processed < budget) { 1971 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1972 napi_complete_done(napi, frames_processed); 1973 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1974 napi_reschedule(napi)) { 1975 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1976 goto restart_poll; 1977 } 1978 } 1979 return frames_processed; 1980 } 1981 1982 #ifdef CONFIG_NET_POLL_CONTROLLER 1983 static void ibmvnic_netpoll_controller(struct net_device *dev) 1984 { 1985 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1986 int i; 1987 1988 replenish_pools(netdev_priv(dev)); 1989 for (i = 0; i < adapter->req_rx_queues; i++) 1990 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1991 adapter->rx_scrq[i]); 1992 } 1993 #endif 1994 1995 static int wait_for_reset(struct ibmvnic_adapter *adapter) 1996 { 1997 adapter->fallback.mtu = adapter->req_mtu; 1998 adapter->fallback.rx_queues = adapter->req_rx_queues; 1999 adapter->fallback.tx_queues = adapter->req_tx_queues; 2000 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2001 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2002 2003 init_completion(&adapter->reset_done); 2004 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2005 adapter->wait_for_reset = true; 2006 wait_for_completion(&adapter->reset_done); 2007 2008 if (adapter->reset_done_rc) { 2009 adapter->desired.mtu = adapter->fallback.mtu; 2010 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2011 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2012 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2013 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2014 2015 init_completion(&adapter->reset_done); 2016 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2017 wait_for_completion(&adapter->reset_done); 2018 } 2019 adapter->wait_for_reset = false; 2020 2021 return adapter->reset_done_rc; 2022 } 2023 2024 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2025 { 2026 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2027 2028 adapter->desired.mtu = new_mtu + ETH_HLEN; 2029 2030 return wait_for_reset(adapter); 2031 } 2032 2033 static const struct net_device_ops ibmvnic_netdev_ops = { 2034 .ndo_open = ibmvnic_open, 2035 .ndo_stop = ibmvnic_close, 2036 .ndo_start_xmit = ibmvnic_xmit, 2037 .ndo_set_rx_mode = ibmvnic_set_multi, 2038 .ndo_set_mac_address = ibmvnic_set_mac, 2039 .ndo_validate_addr = eth_validate_addr, 2040 .ndo_tx_timeout = ibmvnic_tx_timeout, 2041 #ifdef CONFIG_NET_POLL_CONTROLLER 2042 .ndo_poll_controller = ibmvnic_netpoll_controller, 2043 #endif 2044 .ndo_change_mtu = ibmvnic_change_mtu, 2045 }; 2046 2047 /* ethtool functions */ 2048 2049 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2050 struct ethtool_link_ksettings *cmd) 2051 { 2052 u32 supported, advertising; 2053 2054 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2055 SUPPORTED_FIBRE); 2056 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2057 ADVERTISED_FIBRE); 2058 cmd->base.speed = SPEED_1000; 2059 cmd->base.duplex = DUPLEX_FULL; 2060 cmd->base.port = PORT_FIBRE; 2061 cmd->base.phy_address = 0; 2062 cmd->base.autoneg = AUTONEG_ENABLE; 2063 2064 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2065 supported); 2066 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2067 advertising); 2068 2069 return 0; 2070 } 2071 2072 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2073 struct ethtool_drvinfo *info) 2074 { 2075 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2076 2077 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2078 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2079 strlcpy(info->fw_version, adapter->fw_version, 2080 sizeof(info->fw_version)); 2081 } 2082 2083 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2086 2087 return adapter->msg_enable; 2088 } 2089 2090 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2091 { 2092 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2093 2094 adapter->msg_enable = data; 2095 } 2096 2097 static u32 ibmvnic_get_link(struct net_device *netdev) 2098 { 2099 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2100 2101 /* Don't need to send a query because we request a logical link up at 2102 * init and then we wait for link state indications 2103 */ 2104 return adapter->logical_link_state; 2105 } 2106 2107 static void ibmvnic_get_ringparam(struct net_device *netdev, 2108 struct ethtool_ringparam *ring) 2109 { 2110 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2111 2112 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2113 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2114 ring->rx_mini_max_pending = 0; 2115 ring->rx_jumbo_max_pending = 0; 2116 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2117 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2118 ring->rx_mini_pending = 0; 2119 ring->rx_jumbo_pending = 0; 2120 } 2121 2122 static int ibmvnic_set_ringparam(struct net_device *netdev, 2123 struct ethtool_ringparam *ring) 2124 { 2125 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2126 2127 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2128 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2129 netdev_err(netdev, "Invalid request.\n"); 2130 netdev_err(netdev, "Max tx buffers = %llu\n", 2131 adapter->max_rx_add_entries_per_subcrq); 2132 netdev_err(netdev, "Max rx buffers = %llu\n", 2133 adapter->max_tx_entries_per_subcrq); 2134 return -EINVAL; 2135 } 2136 2137 adapter->desired.rx_entries = ring->rx_pending; 2138 adapter->desired.tx_entries = ring->tx_pending; 2139 2140 return wait_for_reset(adapter); 2141 } 2142 2143 static void ibmvnic_get_channels(struct net_device *netdev, 2144 struct ethtool_channels *channels) 2145 { 2146 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2147 2148 channels->max_rx = adapter->max_rx_queues; 2149 channels->max_tx = adapter->max_tx_queues; 2150 channels->max_other = 0; 2151 channels->max_combined = 0; 2152 channels->rx_count = adapter->req_rx_queues; 2153 channels->tx_count = adapter->req_tx_queues; 2154 channels->other_count = 0; 2155 channels->combined_count = 0; 2156 } 2157 2158 static int ibmvnic_set_channels(struct net_device *netdev, 2159 struct ethtool_channels *channels) 2160 { 2161 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2162 2163 adapter->desired.rx_queues = channels->rx_count; 2164 adapter->desired.tx_queues = channels->tx_count; 2165 2166 return wait_for_reset(adapter); 2167 } 2168 2169 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2170 { 2171 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2172 int i; 2173 2174 if (stringset != ETH_SS_STATS) 2175 return; 2176 2177 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2178 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2179 2180 for (i = 0; i < adapter->req_tx_queues; i++) { 2181 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2182 data += ETH_GSTRING_LEN; 2183 2184 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2185 data += ETH_GSTRING_LEN; 2186 2187 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2188 data += ETH_GSTRING_LEN; 2189 } 2190 2191 for (i = 0; i < adapter->req_rx_queues; i++) { 2192 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2193 data += ETH_GSTRING_LEN; 2194 2195 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2196 data += ETH_GSTRING_LEN; 2197 2198 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2199 data += ETH_GSTRING_LEN; 2200 } 2201 } 2202 2203 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2204 { 2205 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2206 2207 switch (sset) { 2208 case ETH_SS_STATS: 2209 return ARRAY_SIZE(ibmvnic_stats) + 2210 adapter->req_tx_queues * NUM_TX_STATS + 2211 adapter->req_rx_queues * NUM_RX_STATS; 2212 default: 2213 return -EOPNOTSUPP; 2214 } 2215 } 2216 2217 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2218 struct ethtool_stats *stats, u64 *data) 2219 { 2220 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2221 union ibmvnic_crq crq; 2222 int i, j; 2223 2224 memset(&crq, 0, sizeof(crq)); 2225 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2226 crq.request_statistics.cmd = REQUEST_STATISTICS; 2227 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2228 crq.request_statistics.len = 2229 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2230 2231 /* Wait for data to be written */ 2232 init_completion(&adapter->stats_done); 2233 ibmvnic_send_crq(adapter, &crq); 2234 wait_for_completion(&adapter->stats_done); 2235 2236 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2237 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2238 ibmvnic_stats[i].offset)); 2239 2240 for (j = 0; j < adapter->req_tx_queues; j++) { 2241 data[i] = adapter->tx_stats_buffers[j].packets; 2242 i++; 2243 data[i] = adapter->tx_stats_buffers[j].bytes; 2244 i++; 2245 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2246 i++; 2247 } 2248 2249 for (j = 0; j < adapter->req_rx_queues; j++) { 2250 data[i] = adapter->rx_stats_buffers[j].packets; 2251 i++; 2252 data[i] = adapter->rx_stats_buffers[j].bytes; 2253 i++; 2254 data[i] = adapter->rx_stats_buffers[j].interrupts; 2255 i++; 2256 } 2257 } 2258 2259 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2260 .get_drvinfo = ibmvnic_get_drvinfo, 2261 .get_msglevel = ibmvnic_get_msglevel, 2262 .set_msglevel = ibmvnic_set_msglevel, 2263 .get_link = ibmvnic_get_link, 2264 .get_ringparam = ibmvnic_get_ringparam, 2265 .set_ringparam = ibmvnic_set_ringparam, 2266 .get_channels = ibmvnic_get_channels, 2267 .set_channels = ibmvnic_set_channels, 2268 .get_strings = ibmvnic_get_strings, 2269 .get_sset_count = ibmvnic_get_sset_count, 2270 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2271 .get_link_ksettings = ibmvnic_get_link_ksettings, 2272 }; 2273 2274 /* Routines for managing CRQs/sCRQs */ 2275 2276 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2277 struct ibmvnic_sub_crq_queue *scrq) 2278 { 2279 int rc; 2280 2281 if (scrq->irq) { 2282 free_irq(scrq->irq, scrq); 2283 irq_dispose_mapping(scrq->irq); 2284 scrq->irq = 0; 2285 } 2286 2287 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2288 scrq->cur = 0; 2289 2290 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2291 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2292 return rc; 2293 } 2294 2295 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2296 { 2297 int i, rc; 2298 2299 for (i = 0; i < adapter->req_tx_queues; i++) { 2300 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2301 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2302 if (rc) 2303 return rc; 2304 } 2305 2306 for (i = 0; i < adapter->req_rx_queues; i++) { 2307 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2308 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2309 if (rc) 2310 return rc; 2311 } 2312 2313 return rc; 2314 } 2315 2316 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2317 struct ibmvnic_sub_crq_queue *scrq, 2318 bool do_h_free) 2319 { 2320 struct device *dev = &adapter->vdev->dev; 2321 long rc; 2322 2323 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2324 2325 if (do_h_free) { 2326 /* Close the sub-crqs */ 2327 do { 2328 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2329 adapter->vdev->unit_address, 2330 scrq->crq_num); 2331 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2332 2333 if (rc) { 2334 netdev_err(adapter->netdev, 2335 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2336 scrq->crq_num, rc); 2337 } 2338 } 2339 2340 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2341 DMA_BIDIRECTIONAL); 2342 free_pages((unsigned long)scrq->msgs, 2); 2343 kfree(scrq); 2344 } 2345 2346 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2347 *adapter) 2348 { 2349 struct device *dev = &adapter->vdev->dev; 2350 struct ibmvnic_sub_crq_queue *scrq; 2351 int rc; 2352 2353 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2354 if (!scrq) 2355 return NULL; 2356 2357 scrq->msgs = 2358 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2359 if (!scrq->msgs) { 2360 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2361 goto zero_page_failed; 2362 } 2363 2364 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2365 DMA_BIDIRECTIONAL); 2366 if (dma_mapping_error(dev, scrq->msg_token)) { 2367 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2368 goto map_failed; 2369 } 2370 2371 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2372 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2373 2374 if (rc == H_RESOURCE) 2375 rc = ibmvnic_reset_crq(adapter); 2376 2377 if (rc == H_CLOSED) { 2378 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2379 } else if (rc) { 2380 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2381 goto reg_failed; 2382 } 2383 2384 scrq->adapter = adapter; 2385 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2386 spin_lock_init(&scrq->lock); 2387 2388 netdev_dbg(adapter->netdev, 2389 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2390 scrq->crq_num, scrq->hw_irq, scrq->irq); 2391 2392 return scrq; 2393 2394 reg_failed: 2395 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2396 DMA_BIDIRECTIONAL); 2397 map_failed: 2398 free_pages((unsigned long)scrq->msgs, 2); 2399 zero_page_failed: 2400 kfree(scrq); 2401 2402 return NULL; 2403 } 2404 2405 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2406 { 2407 int i; 2408 2409 if (adapter->tx_scrq) { 2410 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2411 if (!adapter->tx_scrq[i]) 2412 continue; 2413 2414 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2415 i); 2416 if (adapter->tx_scrq[i]->irq) { 2417 free_irq(adapter->tx_scrq[i]->irq, 2418 adapter->tx_scrq[i]); 2419 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2420 adapter->tx_scrq[i]->irq = 0; 2421 } 2422 2423 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2424 do_h_free); 2425 } 2426 2427 kfree(adapter->tx_scrq); 2428 adapter->tx_scrq = NULL; 2429 adapter->num_active_tx_scrqs = 0; 2430 } 2431 2432 if (adapter->rx_scrq) { 2433 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2434 if (!adapter->rx_scrq[i]) 2435 continue; 2436 2437 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2438 i); 2439 if (adapter->rx_scrq[i]->irq) { 2440 free_irq(adapter->rx_scrq[i]->irq, 2441 adapter->rx_scrq[i]); 2442 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2443 adapter->rx_scrq[i]->irq = 0; 2444 } 2445 2446 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2447 do_h_free); 2448 } 2449 2450 kfree(adapter->rx_scrq); 2451 adapter->rx_scrq = NULL; 2452 adapter->num_active_rx_scrqs = 0; 2453 } 2454 } 2455 2456 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2457 struct ibmvnic_sub_crq_queue *scrq) 2458 { 2459 struct device *dev = &adapter->vdev->dev; 2460 unsigned long rc; 2461 2462 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2463 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2464 if (rc) 2465 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2466 scrq->hw_irq, rc); 2467 return rc; 2468 } 2469 2470 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2471 struct ibmvnic_sub_crq_queue *scrq) 2472 { 2473 struct device *dev = &adapter->vdev->dev; 2474 unsigned long rc; 2475 2476 if (scrq->hw_irq > 0x100000000ULL) { 2477 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2478 return 1; 2479 } 2480 2481 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2482 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2483 if (rc) 2484 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2485 scrq->hw_irq, rc); 2486 return rc; 2487 } 2488 2489 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2490 struct ibmvnic_sub_crq_queue *scrq) 2491 { 2492 struct device *dev = &adapter->vdev->dev; 2493 struct ibmvnic_tx_buff *txbuff; 2494 union sub_crq *next; 2495 int index; 2496 int i, j; 2497 u8 first; 2498 2499 restart_loop: 2500 while (pending_scrq(adapter, scrq)) { 2501 unsigned int pool = scrq->pool_index; 2502 int num_entries = 0; 2503 2504 next = ibmvnic_next_scrq(adapter, scrq); 2505 for (i = 0; i < next->tx_comp.num_comps; i++) { 2506 if (next->tx_comp.rcs[i]) { 2507 dev_err(dev, "tx error %x\n", 2508 next->tx_comp.rcs[i]); 2509 continue; 2510 } 2511 index = be32_to_cpu(next->tx_comp.correlators[i]); 2512 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 2513 2514 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2515 if (!txbuff->data_dma[j]) 2516 continue; 2517 2518 txbuff->data_dma[j] = 0; 2519 } 2520 /* if sub_crq was sent indirectly */ 2521 first = txbuff->indir_arr[0].generic.first; 2522 if (first == IBMVNIC_CRQ_CMD) { 2523 dma_unmap_single(dev, txbuff->indir_dma, 2524 sizeof(txbuff->indir_arr), 2525 DMA_TO_DEVICE); 2526 } 2527 2528 if (txbuff->last_frag) { 2529 dev_kfree_skb_any(txbuff->skb); 2530 txbuff->skb = NULL; 2531 } 2532 2533 num_entries += txbuff->num_entries; 2534 2535 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2536 producer_index] = index; 2537 adapter->tx_pool[pool].producer_index = 2538 (adapter->tx_pool[pool].producer_index + 1) % 2539 adapter->req_tx_entries_per_subcrq; 2540 } 2541 /* remove tx_comp scrq*/ 2542 next->tx_comp.first = 0; 2543 2544 if (atomic_sub_return(num_entries, &scrq->used) <= 2545 (adapter->req_tx_entries_per_subcrq / 2) && 2546 __netif_subqueue_stopped(adapter->netdev, 2547 scrq->pool_index)) { 2548 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2549 netdev_info(adapter->netdev, "Started queue %d\n", 2550 scrq->pool_index); 2551 } 2552 } 2553 2554 enable_scrq_irq(adapter, scrq); 2555 2556 if (pending_scrq(adapter, scrq)) { 2557 disable_scrq_irq(adapter, scrq); 2558 goto restart_loop; 2559 } 2560 2561 return 0; 2562 } 2563 2564 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2565 { 2566 struct ibmvnic_sub_crq_queue *scrq = instance; 2567 struct ibmvnic_adapter *adapter = scrq->adapter; 2568 2569 disable_scrq_irq(adapter, scrq); 2570 ibmvnic_complete_tx(adapter, scrq); 2571 2572 return IRQ_HANDLED; 2573 } 2574 2575 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2576 { 2577 struct ibmvnic_sub_crq_queue *scrq = instance; 2578 struct ibmvnic_adapter *adapter = scrq->adapter; 2579 2580 /* When booting a kdump kernel we can hit pending interrupts 2581 * prior to completing driver initialization. 2582 */ 2583 if (unlikely(adapter->state != VNIC_OPEN)) 2584 return IRQ_NONE; 2585 2586 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2587 2588 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2589 disable_scrq_irq(adapter, scrq); 2590 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2591 } 2592 2593 return IRQ_HANDLED; 2594 } 2595 2596 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2597 { 2598 struct device *dev = &adapter->vdev->dev; 2599 struct ibmvnic_sub_crq_queue *scrq; 2600 int i = 0, j = 0; 2601 int rc = 0; 2602 2603 for (i = 0; i < adapter->req_tx_queues; i++) { 2604 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2605 i); 2606 scrq = adapter->tx_scrq[i]; 2607 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2608 2609 if (!scrq->irq) { 2610 rc = -EINVAL; 2611 dev_err(dev, "Error mapping irq\n"); 2612 goto req_tx_irq_failed; 2613 } 2614 2615 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2616 0, "ibmvnic_tx", scrq); 2617 2618 if (rc) { 2619 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2620 scrq->irq, rc); 2621 irq_dispose_mapping(scrq->irq); 2622 goto req_tx_irq_failed; 2623 } 2624 } 2625 2626 for (i = 0; i < adapter->req_rx_queues; i++) { 2627 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2628 i); 2629 scrq = adapter->rx_scrq[i]; 2630 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2631 if (!scrq->irq) { 2632 rc = -EINVAL; 2633 dev_err(dev, "Error mapping irq\n"); 2634 goto req_rx_irq_failed; 2635 } 2636 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2637 0, "ibmvnic_rx", scrq); 2638 if (rc) { 2639 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2640 scrq->irq, rc); 2641 irq_dispose_mapping(scrq->irq); 2642 goto req_rx_irq_failed; 2643 } 2644 } 2645 return rc; 2646 2647 req_rx_irq_failed: 2648 for (j = 0; j < i; j++) { 2649 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2650 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2651 } 2652 i = adapter->req_tx_queues; 2653 req_tx_irq_failed: 2654 for (j = 0; j < i; j++) { 2655 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2656 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2657 } 2658 release_sub_crqs(adapter, 1); 2659 return rc; 2660 } 2661 2662 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2663 { 2664 struct device *dev = &adapter->vdev->dev; 2665 struct ibmvnic_sub_crq_queue **allqueues; 2666 int registered_queues = 0; 2667 int total_queues; 2668 int more = 0; 2669 int i; 2670 2671 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2672 2673 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2674 if (!allqueues) 2675 return -1; 2676 2677 for (i = 0; i < total_queues; i++) { 2678 allqueues[i] = init_sub_crq_queue(adapter); 2679 if (!allqueues[i]) { 2680 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2681 break; 2682 } 2683 registered_queues++; 2684 } 2685 2686 /* Make sure we were able to register the minimum number of queues */ 2687 if (registered_queues < 2688 adapter->min_tx_queues + adapter->min_rx_queues) { 2689 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2690 goto tx_failed; 2691 } 2692 2693 /* Distribute the failed allocated queues*/ 2694 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2695 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2696 switch (i % 3) { 2697 case 0: 2698 if (adapter->req_rx_queues > adapter->min_rx_queues) 2699 adapter->req_rx_queues--; 2700 else 2701 more++; 2702 break; 2703 case 1: 2704 if (adapter->req_tx_queues > adapter->min_tx_queues) 2705 adapter->req_tx_queues--; 2706 else 2707 more++; 2708 break; 2709 } 2710 } 2711 2712 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2713 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2714 if (!adapter->tx_scrq) 2715 goto tx_failed; 2716 2717 for (i = 0; i < adapter->req_tx_queues; i++) { 2718 adapter->tx_scrq[i] = allqueues[i]; 2719 adapter->tx_scrq[i]->pool_index = i; 2720 adapter->num_active_tx_scrqs++; 2721 } 2722 2723 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2724 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2725 if (!adapter->rx_scrq) 2726 goto rx_failed; 2727 2728 for (i = 0; i < adapter->req_rx_queues; i++) { 2729 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2730 adapter->rx_scrq[i]->scrq_num = i; 2731 adapter->num_active_rx_scrqs++; 2732 } 2733 2734 kfree(allqueues); 2735 return 0; 2736 2737 rx_failed: 2738 kfree(adapter->tx_scrq); 2739 adapter->tx_scrq = NULL; 2740 tx_failed: 2741 for (i = 0; i < registered_queues; i++) 2742 release_sub_crq_queue(adapter, allqueues[i], 1); 2743 kfree(allqueues); 2744 return -1; 2745 } 2746 2747 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2748 { 2749 struct device *dev = &adapter->vdev->dev; 2750 union ibmvnic_crq crq; 2751 int max_entries; 2752 2753 if (!retry) { 2754 /* Sub-CRQ entries are 32 byte long */ 2755 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2756 2757 if (adapter->min_tx_entries_per_subcrq > entries_page || 2758 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2759 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2760 return; 2761 } 2762 2763 if (adapter->desired.mtu) 2764 adapter->req_mtu = adapter->desired.mtu; 2765 else 2766 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2767 2768 if (!adapter->desired.tx_entries) 2769 adapter->desired.tx_entries = 2770 adapter->max_tx_entries_per_subcrq; 2771 if (!adapter->desired.rx_entries) 2772 adapter->desired.rx_entries = 2773 adapter->max_rx_add_entries_per_subcrq; 2774 2775 max_entries = IBMVNIC_MAX_LTB_SIZE / 2776 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 2777 2778 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2779 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 2780 adapter->desired.tx_entries = max_entries; 2781 } 2782 2783 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2784 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 2785 adapter->desired.rx_entries = max_entries; 2786 } 2787 2788 if (adapter->desired.tx_entries) 2789 adapter->req_tx_entries_per_subcrq = 2790 adapter->desired.tx_entries; 2791 else 2792 adapter->req_tx_entries_per_subcrq = 2793 adapter->max_tx_entries_per_subcrq; 2794 2795 if (adapter->desired.rx_entries) 2796 adapter->req_rx_add_entries_per_subcrq = 2797 adapter->desired.rx_entries; 2798 else 2799 adapter->req_rx_add_entries_per_subcrq = 2800 adapter->max_rx_add_entries_per_subcrq; 2801 2802 if (adapter->desired.tx_queues) 2803 adapter->req_tx_queues = 2804 adapter->desired.tx_queues; 2805 else 2806 adapter->req_tx_queues = 2807 adapter->opt_tx_comp_sub_queues; 2808 2809 if (adapter->desired.rx_queues) 2810 adapter->req_rx_queues = 2811 adapter->desired.rx_queues; 2812 else 2813 adapter->req_rx_queues = 2814 adapter->opt_rx_comp_queues; 2815 2816 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2817 } 2818 2819 memset(&crq, 0, sizeof(crq)); 2820 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2821 crq.request_capability.cmd = REQUEST_CAPABILITY; 2822 2823 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2824 crq.request_capability.number = cpu_to_be64(adapter->req_tx_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_QUEUES); 2829 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2830 atomic_inc(&adapter->running_cap_crqs); 2831 ibmvnic_send_crq(adapter, &crq); 2832 2833 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2834 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2835 atomic_inc(&adapter->running_cap_crqs); 2836 ibmvnic_send_crq(adapter, &crq); 2837 2838 crq.request_capability.capability = 2839 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2840 crq.request_capability.number = 2841 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2842 atomic_inc(&adapter->running_cap_crqs); 2843 ibmvnic_send_crq(adapter, &crq); 2844 2845 crq.request_capability.capability = 2846 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2847 crq.request_capability.number = 2848 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2849 atomic_inc(&adapter->running_cap_crqs); 2850 ibmvnic_send_crq(adapter, &crq); 2851 2852 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2853 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2854 atomic_inc(&adapter->running_cap_crqs); 2855 ibmvnic_send_crq(adapter, &crq); 2856 2857 if (adapter->netdev->flags & IFF_PROMISC) { 2858 if (adapter->promisc_supported) { 2859 crq.request_capability.capability = 2860 cpu_to_be16(PROMISC_REQUESTED); 2861 crq.request_capability.number = cpu_to_be64(1); 2862 atomic_inc(&adapter->running_cap_crqs); 2863 ibmvnic_send_crq(adapter, &crq); 2864 } 2865 } else { 2866 crq.request_capability.capability = 2867 cpu_to_be16(PROMISC_REQUESTED); 2868 crq.request_capability.number = cpu_to_be64(0); 2869 atomic_inc(&adapter->running_cap_crqs); 2870 ibmvnic_send_crq(adapter, &crq); 2871 } 2872 } 2873 2874 static int pending_scrq(struct ibmvnic_adapter *adapter, 2875 struct ibmvnic_sub_crq_queue *scrq) 2876 { 2877 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2878 2879 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2880 return 1; 2881 else 2882 return 0; 2883 } 2884 2885 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2886 struct ibmvnic_sub_crq_queue *scrq) 2887 { 2888 union sub_crq *entry; 2889 unsigned long flags; 2890 2891 spin_lock_irqsave(&scrq->lock, flags); 2892 entry = &scrq->msgs[scrq->cur]; 2893 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2894 if (++scrq->cur == scrq->size) 2895 scrq->cur = 0; 2896 } else { 2897 entry = NULL; 2898 } 2899 spin_unlock_irqrestore(&scrq->lock, flags); 2900 2901 return entry; 2902 } 2903 2904 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2905 { 2906 struct ibmvnic_crq_queue *queue = &adapter->crq; 2907 union ibmvnic_crq *crq; 2908 2909 crq = &queue->msgs[queue->cur]; 2910 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2911 if (++queue->cur == queue->size) 2912 queue->cur = 0; 2913 } else { 2914 crq = NULL; 2915 } 2916 2917 return crq; 2918 } 2919 2920 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2921 union sub_crq *sub_crq) 2922 { 2923 unsigned int ua = adapter->vdev->unit_address; 2924 struct device *dev = &adapter->vdev->dev; 2925 u64 *u64_crq = (u64 *)sub_crq; 2926 int rc; 2927 2928 netdev_dbg(adapter->netdev, 2929 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2930 (unsigned long int)cpu_to_be64(remote_handle), 2931 (unsigned long int)cpu_to_be64(u64_crq[0]), 2932 (unsigned long int)cpu_to_be64(u64_crq[1]), 2933 (unsigned long int)cpu_to_be64(u64_crq[2]), 2934 (unsigned long int)cpu_to_be64(u64_crq[3])); 2935 2936 /* Make sure the hypervisor sees the complete request */ 2937 mb(); 2938 2939 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2940 cpu_to_be64(remote_handle), 2941 cpu_to_be64(u64_crq[0]), 2942 cpu_to_be64(u64_crq[1]), 2943 cpu_to_be64(u64_crq[2]), 2944 cpu_to_be64(u64_crq[3])); 2945 2946 if (rc) { 2947 if (rc == H_CLOSED) 2948 dev_warn(dev, "CRQ Queue closed\n"); 2949 dev_err(dev, "Send error (rc=%d)\n", rc); 2950 } 2951 2952 return rc; 2953 } 2954 2955 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2956 u64 remote_handle, u64 ioba, u64 num_entries) 2957 { 2958 unsigned int ua = adapter->vdev->unit_address; 2959 struct device *dev = &adapter->vdev->dev; 2960 int rc; 2961 2962 /* Make sure the hypervisor sees the complete request */ 2963 mb(); 2964 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2965 cpu_to_be64(remote_handle), 2966 ioba, num_entries); 2967 2968 if (rc) { 2969 if (rc == H_CLOSED) 2970 dev_warn(dev, "CRQ Queue closed\n"); 2971 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2972 } 2973 2974 return rc; 2975 } 2976 2977 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2978 union ibmvnic_crq *crq) 2979 { 2980 unsigned int ua = adapter->vdev->unit_address; 2981 struct device *dev = &adapter->vdev->dev; 2982 u64 *u64_crq = (u64 *)crq; 2983 int rc; 2984 2985 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2986 (unsigned long int)cpu_to_be64(u64_crq[0]), 2987 (unsigned long int)cpu_to_be64(u64_crq[1])); 2988 2989 /* Make sure the hypervisor sees the complete request */ 2990 mb(); 2991 2992 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2993 cpu_to_be64(u64_crq[0]), 2994 cpu_to_be64(u64_crq[1])); 2995 2996 if (rc) { 2997 if (rc == H_CLOSED) { 2998 dev_warn(dev, "CRQ Queue closed\n"); 2999 if (adapter->resetting) 3000 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3001 } 3002 3003 dev_warn(dev, "Send error (rc=%d)\n", rc); 3004 } 3005 3006 return rc; 3007 } 3008 3009 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3010 { 3011 union ibmvnic_crq crq; 3012 3013 memset(&crq, 0, sizeof(crq)); 3014 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3015 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3016 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3017 3018 return ibmvnic_send_crq(adapter, &crq); 3019 } 3020 3021 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3022 { 3023 union ibmvnic_crq crq; 3024 3025 memset(&crq, 0, sizeof(crq)); 3026 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3027 crq.version_exchange.cmd = VERSION_EXCHANGE; 3028 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3029 3030 return ibmvnic_send_crq(adapter, &crq); 3031 } 3032 3033 struct vnic_login_client_data { 3034 u8 type; 3035 __be16 len; 3036 char name; 3037 } __packed; 3038 3039 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3040 { 3041 int len; 3042 3043 /* Calculate the amount of buffer space needed for the 3044 * vnic client data in the login buffer. There are four entries, 3045 * OS name, LPAR name, device name, and a null last entry. 3046 */ 3047 len = 4 * sizeof(struct vnic_login_client_data); 3048 len += 6; /* "Linux" plus NULL */ 3049 len += strlen(utsname()->nodename) + 1; 3050 len += strlen(adapter->netdev->name) + 1; 3051 3052 return len; 3053 } 3054 3055 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3056 struct vnic_login_client_data *vlcd) 3057 { 3058 const char *os_name = "Linux"; 3059 int len; 3060 3061 /* Type 1 - LPAR OS */ 3062 vlcd->type = 1; 3063 len = strlen(os_name) + 1; 3064 vlcd->len = cpu_to_be16(len); 3065 strncpy(&vlcd->name, os_name, len); 3066 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3067 3068 /* Type 2 - LPAR name */ 3069 vlcd->type = 2; 3070 len = strlen(utsname()->nodename) + 1; 3071 vlcd->len = cpu_to_be16(len); 3072 strncpy(&vlcd->name, utsname()->nodename, len); 3073 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3074 3075 /* Type 3 - device name */ 3076 vlcd->type = 3; 3077 len = strlen(adapter->netdev->name) + 1; 3078 vlcd->len = cpu_to_be16(len); 3079 strncpy(&vlcd->name, adapter->netdev->name, len); 3080 } 3081 3082 static void send_login(struct ibmvnic_adapter *adapter) 3083 { 3084 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3085 struct ibmvnic_login_buffer *login_buffer; 3086 struct device *dev = &adapter->vdev->dev; 3087 dma_addr_t rsp_buffer_token; 3088 dma_addr_t buffer_token; 3089 size_t rsp_buffer_size; 3090 union ibmvnic_crq crq; 3091 size_t buffer_size; 3092 __be64 *tx_list_p; 3093 __be64 *rx_list_p; 3094 int client_data_len; 3095 struct vnic_login_client_data *vlcd; 3096 int i; 3097 3098 release_login_rsp_buffer(adapter); 3099 client_data_len = vnic_client_data_len(adapter); 3100 3101 buffer_size = 3102 sizeof(struct ibmvnic_login_buffer) + 3103 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3104 client_data_len; 3105 3106 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3107 if (!login_buffer) 3108 goto buf_alloc_failed; 3109 3110 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3111 DMA_TO_DEVICE); 3112 if (dma_mapping_error(dev, buffer_token)) { 3113 dev_err(dev, "Couldn't map login buffer\n"); 3114 goto buf_map_failed; 3115 } 3116 3117 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3118 sizeof(u64) * adapter->req_tx_queues + 3119 sizeof(u64) * adapter->req_rx_queues + 3120 sizeof(u64) * adapter->req_rx_queues + 3121 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3122 3123 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3124 if (!login_rsp_buffer) 3125 goto buf_rsp_alloc_failed; 3126 3127 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3128 rsp_buffer_size, DMA_FROM_DEVICE); 3129 if (dma_mapping_error(dev, rsp_buffer_token)) { 3130 dev_err(dev, "Couldn't map login rsp buffer\n"); 3131 goto buf_rsp_map_failed; 3132 } 3133 3134 adapter->login_buf = login_buffer; 3135 adapter->login_buf_token = buffer_token; 3136 adapter->login_buf_sz = buffer_size; 3137 adapter->login_rsp_buf = login_rsp_buffer; 3138 adapter->login_rsp_buf_token = rsp_buffer_token; 3139 adapter->login_rsp_buf_sz = rsp_buffer_size; 3140 3141 login_buffer->len = cpu_to_be32(buffer_size); 3142 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3143 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3144 login_buffer->off_txcomp_subcrqs = 3145 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3146 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3147 login_buffer->off_rxcomp_subcrqs = 3148 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3149 sizeof(u64) * adapter->req_tx_queues); 3150 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3151 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3152 3153 tx_list_p = (__be64 *)((char *)login_buffer + 3154 sizeof(struct ibmvnic_login_buffer)); 3155 rx_list_p = (__be64 *)((char *)login_buffer + 3156 sizeof(struct ibmvnic_login_buffer) + 3157 sizeof(u64) * adapter->req_tx_queues); 3158 3159 for (i = 0; i < adapter->req_tx_queues; i++) { 3160 if (adapter->tx_scrq[i]) { 3161 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3162 crq_num); 3163 } 3164 } 3165 3166 for (i = 0; i < adapter->req_rx_queues; i++) { 3167 if (adapter->rx_scrq[i]) { 3168 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3169 crq_num); 3170 } 3171 } 3172 3173 /* Insert vNIC login client data */ 3174 vlcd = (struct vnic_login_client_data *) 3175 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3176 login_buffer->client_data_offset = 3177 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3178 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3179 3180 vnic_add_client_data(adapter, vlcd); 3181 3182 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3183 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3184 netdev_dbg(adapter->netdev, "%016lx\n", 3185 ((unsigned long int *)(adapter->login_buf))[i]); 3186 } 3187 3188 memset(&crq, 0, sizeof(crq)); 3189 crq.login.first = IBMVNIC_CRQ_CMD; 3190 crq.login.cmd = LOGIN; 3191 crq.login.ioba = cpu_to_be32(buffer_token); 3192 crq.login.len = cpu_to_be32(buffer_size); 3193 ibmvnic_send_crq(adapter, &crq); 3194 3195 return; 3196 3197 buf_rsp_map_failed: 3198 kfree(login_rsp_buffer); 3199 buf_rsp_alloc_failed: 3200 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3201 buf_map_failed: 3202 kfree(login_buffer); 3203 buf_alloc_failed: 3204 return; 3205 } 3206 3207 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3208 u32 len, u8 map_id) 3209 { 3210 union ibmvnic_crq crq; 3211 3212 memset(&crq, 0, sizeof(crq)); 3213 crq.request_map.first = IBMVNIC_CRQ_CMD; 3214 crq.request_map.cmd = REQUEST_MAP; 3215 crq.request_map.map_id = map_id; 3216 crq.request_map.ioba = cpu_to_be32(addr); 3217 crq.request_map.len = cpu_to_be32(len); 3218 ibmvnic_send_crq(adapter, &crq); 3219 } 3220 3221 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3222 { 3223 union ibmvnic_crq crq; 3224 3225 memset(&crq, 0, sizeof(crq)); 3226 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3227 crq.request_unmap.cmd = REQUEST_UNMAP; 3228 crq.request_unmap.map_id = map_id; 3229 ibmvnic_send_crq(adapter, &crq); 3230 } 3231 3232 static void send_map_query(struct ibmvnic_adapter *adapter) 3233 { 3234 union ibmvnic_crq crq; 3235 3236 memset(&crq, 0, sizeof(crq)); 3237 crq.query_map.first = IBMVNIC_CRQ_CMD; 3238 crq.query_map.cmd = QUERY_MAP; 3239 ibmvnic_send_crq(adapter, &crq); 3240 } 3241 3242 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3243 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3244 { 3245 union ibmvnic_crq crq; 3246 3247 atomic_set(&adapter->running_cap_crqs, 0); 3248 memset(&crq, 0, sizeof(crq)); 3249 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3250 crq.query_capability.cmd = QUERY_CAPABILITY; 3251 3252 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3253 atomic_inc(&adapter->running_cap_crqs); 3254 ibmvnic_send_crq(adapter, &crq); 3255 3256 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3257 atomic_inc(&adapter->running_cap_crqs); 3258 ibmvnic_send_crq(adapter, &crq); 3259 3260 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3261 atomic_inc(&adapter->running_cap_crqs); 3262 ibmvnic_send_crq(adapter, &crq); 3263 3264 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3265 atomic_inc(&adapter->running_cap_crqs); 3266 ibmvnic_send_crq(adapter, &crq); 3267 3268 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3269 atomic_inc(&adapter->running_cap_crqs); 3270 ibmvnic_send_crq(adapter, &crq); 3271 3272 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3273 atomic_inc(&adapter->running_cap_crqs); 3274 ibmvnic_send_crq(adapter, &crq); 3275 3276 crq.query_capability.capability = 3277 cpu_to_be16(MIN_TX_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(MIN_RX_ADD_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_TX_ENTRIES_PER_SUBCRQ); 3288 atomic_inc(&adapter->running_cap_crqs); 3289 ibmvnic_send_crq(adapter, &crq); 3290 3291 crq.query_capability.capability = 3292 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3293 atomic_inc(&adapter->running_cap_crqs); 3294 ibmvnic_send_crq(adapter, &crq); 3295 3296 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3297 atomic_inc(&adapter->running_cap_crqs); 3298 ibmvnic_send_crq(adapter, &crq); 3299 3300 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3301 atomic_inc(&adapter->running_cap_crqs); 3302 ibmvnic_send_crq(adapter, &crq); 3303 3304 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3305 atomic_inc(&adapter->running_cap_crqs); 3306 ibmvnic_send_crq(adapter, &crq); 3307 3308 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3309 atomic_inc(&adapter->running_cap_crqs); 3310 ibmvnic_send_crq(adapter, &crq); 3311 3312 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3313 atomic_inc(&adapter->running_cap_crqs); 3314 ibmvnic_send_crq(adapter, &crq); 3315 3316 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3317 atomic_inc(&adapter->running_cap_crqs); 3318 ibmvnic_send_crq(adapter, &crq); 3319 3320 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3321 atomic_inc(&adapter->running_cap_crqs); 3322 ibmvnic_send_crq(adapter, &crq); 3323 3324 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3325 atomic_inc(&adapter->running_cap_crqs); 3326 ibmvnic_send_crq(adapter, &crq); 3327 3328 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3329 atomic_inc(&adapter->running_cap_crqs); 3330 ibmvnic_send_crq(adapter, &crq); 3331 3332 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3333 atomic_inc(&adapter->running_cap_crqs); 3334 ibmvnic_send_crq(adapter, &crq); 3335 3336 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3337 atomic_inc(&adapter->running_cap_crqs); 3338 ibmvnic_send_crq(adapter, &crq); 3339 3340 crq.query_capability.capability = 3341 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3342 atomic_inc(&adapter->running_cap_crqs); 3343 ibmvnic_send_crq(adapter, &crq); 3344 3345 crq.query_capability.capability = 3346 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3347 atomic_inc(&adapter->running_cap_crqs); 3348 ibmvnic_send_crq(adapter, &crq); 3349 3350 crq.query_capability.capability = 3351 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3352 atomic_inc(&adapter->running_cap_crqs); 3353 ibmvnic_send_crq(adapter, &crq); 3354 3355 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3356 atomic_inc(&adapter->running_cap_crqs); 3357 ibmvnic_send_crq(adapter, &crq); 3358 } 3359 3360 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3361 struct ibmvnic_adapter *adapter) 3362 { 3363 struct device *dev = &adapter->vdev->dev; 3364 3365 if (crq->get_vpd_size_rsp.rc.code) { 3366 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3367 crq->get_vpd_size_rsp.rc.code); 3368 complete(&adapter->fw_done); 3369 return; 3370 } 3371 3372 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3373 complete(&adapter->fw_done); 3374 } 3375 3376 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3377 struct ibmvnic_adapter *adapter) 3378 { 3379 struct device *dev = &adapter->vdev->dev; 3380 unsigned char *substr = NULL; 3381 u8 fw_level_len = 0; 3382 3383 memset(adapter->fw_version, 0, 32); 3384 3385 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3386 DMA_FROM_DEVICE); 3387 3388 if (crq->get_vpd_rsp.rc.code) { 3389 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3390 crq->get_vpd_rsp.rc.code); 3391 goto complete; 3392 } 3393 3394 /* get the position of the firmware version info 3395 * located after the ASCII 'RM' substring in the buffer 3396 */ 3397 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3398 if (!substr) { 3399 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3400 goto complete; 3401 } 3402 3403 /* get length of firmware level ASCII substring */ 3404 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3405 fw_level_len = *(substr + 2); 3406 } else { 3407 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3408 goto complete; 3409 } 3410 3411 /* copy firmware version string from vpd into adapter */ 3412 if ((substr + 3 + fw_level_len) < 3413 (adapter->vpd->buff + adapter->vpd->len)) { 3414 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3415 } else { 3416 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3417 } 3418 3419 complete: 3420 if (adapter->fw_version[0] == '\0') 3421 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3422 complete(&adapter->fw_done); 3423 } 3424 3425 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3426 { 3427 struct device *dev = &adapter->vdev->dev; 3428 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3429 union ibmvnic_crq crq; 3430 int i; 3431 3432 dma_unmap_single(dev, adapter->ip_offload_tok, 3433 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3434 3435 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3436 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3437 netdev_dbg(adapter->netdev, "%016lx\n", 3438 ((unsigned long int *)(buf))[i]); 3439 3440 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3441 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3442 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3443 buf->tcp_ipv4_chksum); 3444 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3445 buf->tcp_ipv6_chksum); 3446 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3447 buf->udp_ipv4_chksum); 3448 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3449 buf->udp_ipv6_chksum); 3450 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3451 buf->large_tx_ipv4); 3452 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3453 buf->large_tx_ipv6); 3454 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3455 buf->large_rx_ipv4); 3456 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3457 buf->large_rx_ipv6); 3458 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3459 buf->max_ipv4_header_size); 3460 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3461 buf->max_ipv6_header_size); 3462 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3463 buf->max_tcp_header_size); 3464 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3465 buf->max_udp_header_size); 3466 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3467 buf->max_large_tx_size); 3468 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3469 buf->max_large_rx_size); 3470 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3471 buf->ipv6_extension_header); 3472 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3473 buf->tcp_pseudosum_req); 3474 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3475 buf->num_ipv6_ext_headers); 3476 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3477 buf->off_ipv6_ext_headers); 3478 3479 adapter->ip_offload_ctrl_tok = 3480 dma_map_single(dev, &adapter->ip_offload_ctrl, 3481 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3482 3483 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3484 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3485 return; 3486 } 3487 3488 adapter->ip_offload_ctrl.len = 3489 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3490 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3491 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3492 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3493 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3494 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3495 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3496 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3497 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3498 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3499 3500 /* large_rx disabled for now, additional features needed */ 3501 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3502 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3503 3504 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3505 3506 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3507 adapter->netdev->features |= NETIF_F_IP_CSUM; 3508 3509 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3510 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3511 3512 if ((adapter->netdev->features & 3513 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3514 adapter->netdev->features |= NETIF_F_RXCSUM; 3515 3516 if (buf->large_tx_ipv4) 3517 adapter->netdev->features |= NETIF_F_TSO; 3518 if (buf->large_tx_ipv6) 3519 adapter->netdev->features |= NETIF_F_TSO6; 3520 3521 adapter->netdev->hw_features |= adapter->netdev->features; 3522 3523 memset(&crq, 0, sizeof(crq)); 3524 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3525 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3526 crq.control_ip_offload.len = 3527 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3528 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3529 ibmvnic_send_crq(adapter, &crq); 3530 } 3531 3532 static void handle_error_info_rsp(union ibmvnic_crq *crq, 3533 struct ibmvnic_adapter *adapter) 3534 { 3535 struct device *dev = &adapter->vdev->dev; 3536 struct ibmvnic_error_buff *error_buff, *tmp; 3537 unsigned long flags; 3538 bool found = false; 3539 int i; 3540 3541 if (!crq->request_error_rsp.rc.code) { 3542 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 3543 crq->request_error_rsp.rc.code); 3544 return; 3545 } 3546 3547 spin_lock_irqsave(&adapter->error_list_lock, flags); 3548 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 3549 if (error_buff->error_id == crq->request_error_rsp.error_id) { 3550 found = true; 3551 list_del(&error_buff->list); 3552 break; 3553 } 3554 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3555 3556 if (!found) { 3557 dev_err(dev, "Couldn't find error id %x\n", 3558 be32_to_cpu(crq->request_error_rsp.error_id)); 3559 return; 3560 } 3561 3562 dev_err(dev, "Detailed info for error id %x:", 3563 be32_to_cpu(crq->request_error_rsp.error_id)); 3564 3565 for (i = 0; i < error_buff->len; i++) { 3566 pr_cont("%02x", (int)error_buff->buff[i]); 3567 if (i % 8 == 7) 3568 pr_cont(" "); 3569 } 3570 pr_cont("\n"); 3571 3572 dma_unmap_single(dev, error_buff->dma, error_buff->len, 3573 DMA_FROM_DEVICE); 3574 kfree(error_buff->buff); 3575 kfree(error_buff); 3576 } 3577 3578 static void request_error_information(struct ibmvnic_adapter *adapter, 3579 union ibmvnic_crq *err_crq) 3580 { 3581 struct device *dev = &adapter->vdev->dev; 3582 struct net_device *netdev = adapter->netdev; 3583 struct ibmvnic_error_buff *error_buff; 3584 unsigned long timeout = msecs_to_jiffies(30000); 3585 union ibmvnic_crq crq; 3586 unsigned long flags; 3587 int rc, detail_len; 3588 3589 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 3590 if (!error_buff) 3591 return; 3592 3593 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 3594 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 3595 if (!error_buff->buff) { 3596 kfree(error_buff); 3597 return; 3598 } 3599 3600 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 3601 DMA_FROM_DEVICE); 3602 if (dma_mapping_error(dev, error_buff->dma)) { 3603 netdev_err(netdev, "Couldn't map error buffer\n"); 3604 kfree(error_buff->buff); 3605 kfree(error_buff); 3606 return; 3607 } 3608 3609 error_buff->len = detail_len; 3610 error_buff->error_id = err_crq->error_indication.error_id; 3611 3612 spin_lock_irqsave(&adapter->error_list_lock, flags); 3613 list_add_tail(&error_buff->list, &adapter->errors); 3614 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3615 3616 memset(&crq, 0, sizeof(crq)); 3617 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 3618 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 3619 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 3620 crq.request_error_info.len = cpu_to_be32(detail_len); 3621 crq.request_error_info.error_id = err_crq->error_indication.error_id; 3622 3623 rc = ibmvnic_send_crq(adapter, &crq); 3624 if (rc) { 3625 netdev_err(netdev, "failed to request error information\n"); 3626 goto err_info_fail; 3627 } 3628 3629 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3630 netdev_err(netdev, "timeout waiting for error information\n"); 3631 goto err_info_fail; 3632 } 3633 3634 return; 3635 3636 err_info_fail: 3637 spin_lock_irqsave(&adapter->error_list_lock, flags); 3638 list_del(&error_buff->list); 3639 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3640 3641 kfree(error_buff->buff); 3642 kfree(error_buff); 3643 } 3644 3645 static void handle_error_indication(union ibmvnic_crq *crq, 3646 struct ibmvnic_adapter *adapter) 3647 { 3648 struct device *dev = &adapter->vdev->dev; 3649 3650 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 3651 crq->error_indication.flags 3652 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3653 be32_to_cpu(crq->error_indication.error_id), 3654 be16_to_cpu(crq->error_indication.error_cause)); 3655 3656 if (be32_to_cpu(crq->error_indication.error_id)) 3657 request_error_information(adapter, crq); 3658 3659 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3660 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3661 else 3662 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3663 } 3664 3665 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3666 struct ibmvnic_adapter *adapter) 3667 { 3668 struct net_device *netdev = adapter->netdev; 3669 struct device *dev = &adapter->vdev->dev; 3670 long rc; 3671 3672 rc = crq->change_mac_addr_rsp.rc.code; 3673 if (rc) { 3674 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3675 goto out; 3676 } 3677 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3678 ETH_ALEN); 3679 out: 3680 complete(&adapter->fw_done); 3681 return rc; 3682 } 3683 3684 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3685 struct ibmvnic_adapter *adapter) 3686 { 3687 struct device *dev = &adapter->vdev->dev; 3688 u64 *req_value; 3689 char *name; 3690 3691 atomic_dec(&adapter->running_cap_crqs); 3692 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3693 case REQ_TX_QUEUES: 3694 req_value = &adapter->req_tx_queues; 3695 name = "tx"; 3696 break; 3697 case REQ_RX_QUEUES: 3698 req_value = &adapter->req_rx_queues; 3699 name = "rx"; 3700 break; 3701 case REQ_RX_ADD_QUEUES: 3702 req_value = &adapter->req_rx_add_queues; 3703 name = "rx_add"; 3704 break; 3705 case REQ_TX_ENTRIES_PER_SUBCRQ: 3706 req_value = &adapter->req_tx_entries_per_subcrq; 3707 name = "tx_entries_per_subcrq"; 3708 break; 3709 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3710 req_value = &adapter->req_rx_add_entries_per_subcrq; 3711 name = "rx_add_entries_per_subcrq"; 3712 break; 3713 case REQ_MTU: 3714 req_value = &adapter->req_mtu; 3715 name = "mtu"; 3716 break; 3717 case PROMISC_REQUESTED: 3718 req_value = &adapter->promisc; 3719 name = "promisc"; 3720 break; 3721 default: 3722 dev_err(dev, "Got invalid cap request rsp %d\n", 3723 crq->request_capability.capability); 3724 return; 3725 } 3726 3727 switch (crq->request_capability_rsp.rc.code) { 3728 case SUCCESS: 3729 break; 3730 case PARTIALSUCCESS: 3731 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3732 *req_value, 3733 (long int)be64_to_cpu(crq->request_capability_rsp. 3734 number), name); 3735 3736 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3737 REQ_MTU) { 3738 pr_err("mtu of %llu is not supported. Reverting.\n", 3739 *req_value); 3740 *req_value = adapter->fallback.mtu; 3741 } else { 3742 *req_value = 3743 be64_to_cpu(crq->request_capability_rsp.number); 3744 } 3745 3746 ibmvnic_send_req_caps(adapter, 1); 3747 return; 3748 default: 3749 dev_err(dev, "Error %d in request cap rsp\n", 3750 crq->request_capability_rsp.rc.code); 3751 return; 3752 } 3753 3754 /* Done receiving requested capabilities, query IP offload support */ 3755 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3756 union ibmvnic_crq newcrq; 3757 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3758 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3759 &adapter->ip_offload_buf; 3760 3761 adapter->wait_capability = false; 3762 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3763 buf_sz, 3764 DMA_FROM_DEVICE); 3765 3766 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3767 if (!firmware_has_feature(FW_FEATURE_CMO)) 3768 dev_err(dev, "Couldn't map offload buffer\n"); 3769 return; 3770 } 3771 3772 memset(&newcrq, 0, sizeof(newcrq)); 3773 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3774 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3775 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3776 newcrq.query_ip_offload.ioba = 3777 cpu_to_be32(adapter->ip_offload_tok); 3778 3779 ibmvnic_send_crq(adapter, &newcrq); 3780 } 3781 } 3782 3783 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3784 struct ibmvnic_adapter *adapter) 3785 { 3786 struct device *dev = &adapter->vdev->dev; 3787 struct net_device *netdev = adapter->netdev; 3788 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3789 struct ibmvnic_login_buffer *login = adapter->login_buf; 3790 int i; 3791 3792 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3793 DMA_BIDIRECTIONAL); 3794 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3795 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3796 3797 /* If the number of queues requested can't be allocated by the 3798 * server, the login response will return with code 1. We will need 3799 * to resend the login buffer with fewer queues requested. 3800 */ 3801 if (login_rsp_crq->generic.rc.code) { 3802 adapter->renegotiate = true; 3803 complete(&adapter->init_done); 3804 return 0; 3805 } 3806 3807 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3808 3809 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3810 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3811 netdev_dbg(adapter->netdev, "%016lx\n", 3812 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3813 } 3814 3815 /* Sanity checks */ 3816 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3817 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3818 adapter->req_rx_add_queues != 3819 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3820 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3821 ibmvnic_remove(adapter->vdev); 3822 return -EIO; 3823 } 3824 release_login_buffer(adapter); 3825 complete(&adapter->init_done); 3826 3827 return 0; 3828 } 3829 3830 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3831 struct ibmvnic_adapter *adapter) 3832 { 3833 struct device *dev = &adapter->vdev->dev; 3834 long rc; 3835 3836 rc = crq->request_unmap_rsp.rc.code; 3837 if (rc) 3838 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3839 } 3840 3841 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3842 struct ibmvnic_adapter *adapter) 3843 { 3844 struct net_device *netdev = adapter->netdev; 3845 struct device *dev = &adapter->vdev->dev; 3846 long rc; 3847 3848 rc = crq->query_map_rsp.rc.code; 3849 if (rc) { 3850 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3851 return; 3852 } 3853 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3854 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3855 crq->query_map_rsp.free_pages); 3856 } 3857 3858 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3859 struct ibmvnic_adapter *adapter) 3860 { 3861 struct net_device *netdev = adapter->netdev; 3862 struct device *dev = &adapter->vdev->dev; 3863 long rc; 3864 3865 atomic_dec(&adapter->running_cap_crqs); 3866 netdev_dbg(netdev, "Outstanding queries: %d\n", 3867 atomic_read(&adapter->running_cap_crqs)); 3868 rc = crq->query_capability.rc.code; 3869 if (rc) { 3870 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3871 goto out; 3872 } 3873 3874 switch (be16_to_cpu(crq->query_capability.capability)) { 3875 case MIN_TX_QUEUES: 3876 adapter->min_tx_queues = 3877 be64_to_cpu(crq->query_capability.number); 3878 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3879 adapter->min_tx_queues); 3880 break; 3881 case MIN_RX_QUEUES: 3882 adapter->min_rx_queues = 3883 be64_to_cpu(crq->query_capability.number); 3884 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3885 adapter->min_rx_queues); 3886 break; 3887 case MIN_RX_ADD_QUEUES: 3888 adapter->min_rx_add_queues = 3889 be64_to_cpu(crq->query_capability.number); 3890 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3891 adapter->min_rx_add_queues); 3892 break; 3893 case MAX_TX_QUEUES: 3894 adapter->max_tx_queues = 3895 be64_to_cpu(crq->query_capability.number); 3896 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3897 adapter->max_tx_queues); 3898 break; 3899 case MAX_RX_QUEUES: 3900 adapter->max_rx_queues = 3901 be64_to_cpu(crq->query_capability.number); 3902 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3903 adapter->max_rx_queues); 3904 break; 3905 case MAX_RX_ADD_QUEUES: 3906 adapter->max_rx_add_queues = 3907 be64_to_cpu(crq->query_capability.number); 3908 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3909 adapter->max_rx_add_queues); 3910 break; 3911 case MIN_TX_ENTRIES_PER_SUBCRQ: 3912 adapter->min_tx_entries_per_subcrq = 3913 be64_to_cpu(crq->query_capability.number); 3914 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3915 adapter->min_tx_entries_per_subcrq); 3916 break; 3917 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3918 adapter->min_rx_add_entries_per_subcrq = 3919 be64_to_cpu(crq->query_capability.number); 3920 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3921 adapter->min_rx_add_entries_per_subcrq); 3922 break; 3923 case MAX_TX_ENTRIES_PER_SUBCRQ: 3924 adapter->max_tx_entries_per_subcrq = 3925 be64_to_cpu(crq->query_capability.number); 3926 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3927 adapter->max_tx_entries_per_subcrq); 3928 break; 3929 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3930 adapter->max_rx_add_entries_per_subcrq = 3931 be64_to_cpu(crq->query_capability.number); 3932 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3933 adapter->max_rx_add_entries_per_subcrq); 3934 break; 3935 case TCP_IP_OFFLOAD: 3936 adapter->tcp_ip_offload = 3937 be64_to_cpu(crq->query_capability.number); 3938 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3939 adapter->tcp_ip_offload); 3940 break; 3941 case PROMISC_SUPPORTED: 3942 adapter->promisc_supported = 3943 be64_to_cpu(crq->query_capability.number); 3944 netdev_dbg(netdev, "promisc_supported = %lld\n", 3945 adapter->promisc_supported); 3946 break; 3947 case MIN_MTU: 3948 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3949 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3950 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3951 break; 3952 case MAX_MTU: 3953 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3954 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3955 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3956 break; 3957 case MAX_MULTICAST_FILTERS: 3958 adapter->max_multicast_filters = 3959 be64_to_cpu(crq->query_capability.number); 3960 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3961 adapter->max_multicast_filters); 3962 break; 3963 case VLAN_HEADER_INSERTION: 3964 adapter->vlan_header_insertion = 3965 be64_to_cpu(crq->query_capability.number); 3966 if (adapter->vlan_header_insertion) 3967 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3968 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3969 adapter->vlan_header_insertion); 3970 break; 3971 case RX_VLAN_HEADER_INSERTION: 3972 adapter->rx_vlan_header_insertion = 3973 be64_to_cpu(crq->query_capability.number); 3974 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3975 adapter->rx_vlan_header_insertion); 3976 break; 3977 case MAX_TX_SG_ENTRIES: 3978 adapter->max_tx_sg_entries = 3979 be64_to_cpu(crq->query_capability.number); 3980 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3981 adapter->max_tx_sg_entries); 3982 break; 3983 case RX_SG_SUPPORTED: 3984 adapter->rx_sg_supported = 3985 be64_to_cpu(crq->query_capability.number); 3986 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3987 adapter->rx_sg_supported); 3988 break; 3989 case OPT_TX_COMP_SUB_QUEUES: 3990 adapter->opt_tx_comp_sub_queues = 3991 be64_to_cpu(crq->query_capability.number); 3992 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3993 adapter->opt_tx_comp_sub_queues); 3994 break; 3995 case OPT_RX_COMP_QUEUES: 3996 adapter->opt_rx_comp_queues = 3997 be64_to_cpu(crq->query_capability.number); 3998 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3999 adapter->opt_rx_comp_queues); 4000 break; 4001 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4002 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4003 be64_to_cpu(crq->query_capability.number); 4004 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4005 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4006 break; 4007 case OPT_TX_ENTRIES_PER_SUBCRQ: 4008 adapter->opt_tx_entries_per_subcrq = 4009 be64_to_cpu(crq->query_capability.number); 4010 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4011 adapter->opt_tx_entries_per_subcrq); 4012 break; 4013 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4014 adapter->opt_rxba_entries_per_subcrq = 4015 be64_to_cpu(crq->query_capability.number); 4016 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4017 adapter->opt_rxba_entries_per_subcrq); 4018 break; 4019 case TX_RX_DESC_REQ: 4020 adapter->tx_rx_desc_req = crq->query_capability.number; 4021 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4022 adapter->tx_rx_desc_req); 4023 break; 4024 4025 default: 4026 netdev_err(netdev, "Got invalid cap rsp %d\n", 4027 crq->query_capability.capability); 4028 } 4029 4030 out: 4031 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4032 adapter->wait_capability = false; 4033 ibmvnic_send_req_caps(adapter, 0); 4034 } 4035 } 4036 4037 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4038 struct ibmvnic_adapter *adapter) 4039 { 4040 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4041 struct net_device *netdev = adapter->netdev; 4042 struct device *dev = &adapter->vdev->dev; 4043 u64 *u64_crq = (u64 *)crq; 4044 long rc; 4045 4046 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4047 (unsigned long int)cpu_to_be64(u64_crq[0]), 4048 (unsigned long int)cpu_to_be64(u64_crq[1])); 4049 switch (gen_crq->first) { 4050 case IBMVNIC_CRQ_INIT_RSP: 4051 switch (gen_crq->cmd) { 4052 case IBMVNIC_CRQ_INIT: 4053 dev_info(dev, "Partner initialized\n"); 4054 adapter->from_passive_init = true; 4055 complete(&adapter->init_done); 4056 break; 4057 case IBMVNIC_CRQ_INIT_COMPLETE: 4058 dev_info(dev, "Partner initialization complete\n"); 4059 send_version_xchg(adapter); 4060 break; 4061 default: 4062 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4063 } 4064 return; 4065 case IBMVNIC_CRQ_XPORT_EVENT: 4066 netif_carrier_off(netdev); 4067 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4068 dev_info(dev, "Migrated, re-enabling adapter\n"); 4069 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4070 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4071 dev_info(dev, "Backing device failover detected\n"); 4072 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4073 } else { 4074 /* The adapter lost the connection */ 4075 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4076 gen_crq->cmd); 4077 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4078 } 4079 return; 4080 case IBMVNIC_CRQ_CMD_RSP: 4081 break; 4082 default: 4083 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4084 gen_crq->first); 4085 return; 4086 } 4087 4088 switch (gen_crq->cmd) { 4089 case VERSION_EXCHANGE_RSP: 4090 rc = crq->version_exchange_rsp.rc.code; 4091 if (rc) { 4092 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4093 break; 4094 } 4095 dev_info(dev, "Partner protocol version is %d\n", 4096 crq->version_exchange_rsp.version); 4097 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4098 ibmvnic_version) 4099 ibmvnic_version = 4100 be16_to_cpu(crq->version_exchange_rsp.version); 4101 send_cap_queries(adapter); 4102 break; 4103 case QUERY_CAPABILITY_RSP: 4104 handle_query_cap_rsp(crq, adapter); 4105 break; 4106 case QUERY_MAP_RSP: 4107 handle_query_map_rsp(crq, adapter); 4108 break; 4109 case REQUEST_MAP_RSP: 4110 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4111 complete(&adapter->fw_done); 4112 break; 4113 case REQUEST_UNMAP_RSP: 4114 handle_request_unmap_rsp(crq, adapter); 4115 break; 4116 case REQUEST_CAPABILITY_RSP: 4117 handle_request_cap_rsp(crq, adapter); 4118 break; 4119 case LOGIN_RSP: 4120 netdev_dbg(netdev, "Got Login Response\n"); 4121 handle_login_rsp(crq, adapter); 4122 break; 4123 case LOGICAL_LINK_STATE_RSP: 4124 netdev_dbg(netdev, 4125 "Got Logical Link State Response, state: %d rc: %d\n", 4126 crq->logical_link_state_rsp.link_state, 4127 crq->logical_link_state_rsp.rc.code); 4128 adapter->logical_link_state = 4129 crq->logical_link_state_rsp.link_state; 4130 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4131 complete(&adapter->init_done); 4132 break; 4133 case LINK_STATE_INDICATION: 4134 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4135 adapter->phys_link_state = 4136 crq->link_state_indication.phys_link_state; 4137 adapter->logical_link_state = 4138 crq->link_state_indication.logical_link_state; 4139 break; 4140 case CHANGE_MAC_ADDR_RSP: 4141 netdev_dbg(netdev, "Got MAC address change Response\n"); 4142 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4143 break; 4144 case ERROR_INDICATION: 4145 netdev_dbg(netdev, "Got Error Indication\n"); 4146 handle_error_indication(crq, adapter); 4147 break; 4148 case REQUEST_ERROR_RSP: 4149 netdev_dbg(netdev, "Got Error Detail Response\n"); 4150 handle_error_info_rsp(crq, adapter); 4151 break; 4152 case REQUEST_STATISTICS_RSP: 4153 netdev_dbg(netdev, "Got Statistics Response\n"); 4154 complete(&adapter->stats_done); 4155 break; 4156 case QUERY_IP_OFFLOAD_RSP: 4157 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4158 handle_query_ip_offload_rsp(adapter); 4159 break; 4160 case MULTICAST_CTRL_RSP: 4161 netdev_dbg(netdev, "Got multicast control Response\n"); 4162 break; 4163 case CONTROL_IP_OFFLOAD_RSP: 4164 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4165 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4166 sizeof(adapter->ip_offload_ctrl), 4167 DMA_TO_DEVICE); 4168 complete(&adapter->init_done); 4169 break; 4170 case COLLECT_FW_TRACE_RSP: 4171 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4172 complete(&adapter->fw_done); 4173 break; 4174 case GET_VPD_SIZE_RSP: 4175 handle_vpd_size_rsp(crq, adapter); 4176 break; 4177 case GET_VPD_RSP: 4178 handle_vpd_rsp(crq, adapter); 4179 break; 4180 default: 4181 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4182 gen_crq->cmd); 4183 } 4184 } 4185 4186 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4187 { 4188 struct ibmvnic_adapter *adapter = instance; 4189 4190 tasklet_schedule(&adapter->tasklet); 4191 return IRQ_HANDLED; 4192 } 4193 4194 static void ibmvnic_tasklet(void *data) 4195 { 4196 struct ibmvnic_adapter *adapter = data; 4197 struct ibmvnic_crq_queue *queue = &adapter->crq; 4198 union ibmvnic_crq *crq; 4199 unsigned long flags; 4200 bool done = false; 4201 4202 spin_lock_irqsave(&queue->lock, flags); 4203 while (!done) { 4204 /* Pull all the valid messages off the CRQ */ 4205 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4206 ibmvnic_handle_crq(crq, adapter); 4207 crq->generic.first = 0; 4208 } 4209 4210 /* remain in tasklet until all 4211 * capabilities responses are received 4212 */ 4213 if (!adapter->wait_capability) 4214 done = true; 4215 } 4216 /* if capabilities CRQ's were sent in this tasklet, the following 4217 * tasklet must wait until all responses are received 4218 */ 4219 if (atomic_read(&adapter->running_cap_crqs) != 0) 4220 adapter->wait_capability = true; 4221 spin_unlock_irqrestore(&queue->lock, flags); 4222 } 4223 4224 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4225 { 4226 struct vio_dev *vdev = adapter->vdev; 4227 int rc; 4228 4229 do { 4230 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4231 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4232 4233 if (rc) 4234 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4235 4236 return rc; 4237 } 4238 4239 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4240 { 4241 struct ibmvnic_crq_queue *crq = &adapter->crq; 4242 struct device *dev = &adapter->vdev->dev; 4243 struct vio_dev *vdev = adapter->vdev; 4244 int rc; 4245 4246 /* Close the CRQ */ 4247 do { 4248 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4249 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4250 4251 /* Clean out the queue */ 4252 memset(crq->msgs, 0, PAGE_SIZE); 4253 crq->cur = 0; 4254 4255 /* And re-open it again */ 4256 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4257 crq->msg_token, PAGE_SIZE); 4258 4259 if (rc == H_CLOSED) 4260 /* Adapter is good, but other end is not ready */ 4261 dev_warn(dev, "Partner adapter not ready\n"); 4262 else if (rc != 0) 4263 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4264 4265 return rc; 4266 } 4267 4268 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4269 { 4270 struct ibmvnic_crq_queue *crq = &adapter->crq; 4271 struct vio_dev *vdev = adapter->vdev; 4272 long rc; 4273 4274 if (!crq->msgs) 4275 return; 4276 4277 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4278 free_irq(vdev->irq, adapter); 4279 tasklet_kill(&adapter->tasklet); 4280 do { 4281 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4282 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4283 4284 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4285 DMA_BIDIRECTIONAL); 4286 free_page((unsigned long)crq->msgs); 4287 crq->msgs = NULL; 4288 } 4289 4290 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4291 { 4292 struct ibmvnic_crq_queue *crq = &adapter->crq; 4293 struct device *dev = &adapter->vdev->dev; 4294 struct vio_dev *vdev = adapter->vdev; 4295 int rc, retrc = -ENOMEM; 4296 4297 if (crq->msgs) 4298 return 0; 4299 4300 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4301 /* Should we allocate more than one page? */ 4302 4303 if (!crq->msgs) 4304 return -ENOMEM; 4305 4306 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4307 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4308 DMA_BIDIRECTIONAL); 4309 if (dma_mapping_error(dev, crq->msg_token)) 4310 goto map_failed; 4311 4312 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4313 crq->msg_token, PAGE_SIZE); 4314 4315 if (rc == H_RESOURCE) 4316 /* maybe kexecing and resource is busy. try a reset */ 4317 rc = ibmvnic_reset_crq(adapter); 4318 retrc = rc; 4319 4320 if (rc == H_CLOSED) { 4321 dev_warn(dev, "Partner adapter not ready\n"); 4322 } else if (rc) { 4323 dev_warn(dev, "Error %d opening adapter\n", rc); 4324 goto reg_crq_failed; 4325 } 4326 4327 retrc = 0; 4328 4329 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4330 (unsigned long)adapter); 4331 4332 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4333 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4334 adapter); 4335 if (rc) { 4336 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4337 vdev->irq, rc); 4338 goto req_irq_failed; 4339 } 4340 4341 rc = vio_enable_interrupts(vdev); 4342 if (rc) { 4343 dev_err(dev, "Error %d enabling interrupts\n", rc); 4344 goto req_irq_failed; 4345 } 4346 4347 crq->cur = 0; 4348 spin_lock_init(&crq->lock); 4349 4350 return retrc; 4351 4352 req_irq_failed: 4353 tasklet_kill(&adapter->tasklet); 4354 do { 4355 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4356 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4357 reg_crq_failed: 4358 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4359 map_failed: 4360 free_page((unsigned long)crq->msgs); 4361 crq->msgs = NULL; 4362 return retrc; 4363 } 4364 4365 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4366 { 4367 struct device *dev = &adapter->vdev->dev; 4368 unsigned long timeout = msecs_to_jiffies(30000); 4369 u64 old_num_rx_queues, old_num_tx_queues; 4370 int rc; 4371 4372 if (adapter->resetting && !adapter->wait_for_reset) { 4373 rc = ibmvnic_reset_crq(adapter); 4374 if (!rc) 4375 rc = vio_enable_interrupts(adapter->vdev); 4376 } else { 4377 rc = init_crq_queue(adapter); 4378 } 4379 4380 if (rc) { 4381 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4382 return rc; 4383 } 4384 4385 adapter->from_passive_init = false; 4386 4387 old_num_rx_queues = adapter->req_rx_queues; 4388 old_num_tx_queues = adapter->req_tx_queues; 4389 4390 init_completion(&adapter->init_done); 4391 adapter->init_done_rc = 0; 4392 ibmvnic_send_crq_init(adapter); 4393 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4394 dev_err(dev, "Initialization sequence timed out\n"); 4395 return -1; 4396 } 4397 4398 if (adapter->init_done_rc) { 4399 release_crq_queue(adapter); 4400 return adapter->init_done_rc; 4401 } 4402 4403 if (adapter->from_passive_init) { 4404 adapter->state = VNIC_OPEN; 4405 adapter->from_passive_init = false; 4406 return -1; 4407 } 4408 4409 if (adapter->resetting && !adapter->wait_for_reset) { 4410 if (adapter->req_rx_queues != old_num_rx_queues || 4411 adapter->req_tx_queues != old_num_tx_queues) { 4412 release_sub_crqs(adapter, 0); 4413 rc = init_sub_crqs(adapter); 4414 } else { 4415 rc = reset_sub_crq_queues(adapter); 4416 } 4417 } else { 4418 rc = init_sub_crqs(adapter); 4419 } 4420 4421 if (rc) { 4422 dev_err(dev, "Initialization of sub crqs failed\n"); 4423 release_crq_queue(adapter); 4424 return rc; 4425 } 4426 4427 rc = init_sub_crq_irqs(adapter); 4428 if (rc) { 4429 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4430 release_crq_queue(adapter); 4431 } 4432 4433 return rc; 4434 } 4435 4436 static struct device_attribute dev_attr_failover; 4437 4438 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4439 { 4440 struct ibmvnic_adapter *adapter; 4441 struct net_device *netdev; 4442 unsigned char *mac_addr_p; 4443 int rc; 4444 4445 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4446 dev->unit_address); 4447 4448 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4449 VETH_MAC_ADDR, NULL); 4450 if (!mac_addr_p) { 4451 dev_err(&dev->dev, 4452 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4453 __FILE__, __LINE__); 4454 return 0; 4455 } 4456 4457 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4458 IBMVNIC_MAX_QUEUES); 4459 if (!netdev) 4460 return -ENOMEM; 4461 4462 adapter = netdev_priv(netdev); 4463 adapter->state = VNIC_PROBING; 4464 dev_set_drvdata(&dev->dev, netdev); 4465 adapter->vdev = dev; 4466 adapter->netdev = netdev; 4467 4468 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4469 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4470 netdev->irq = dev->irq; 4471 netdev->netdev_ops = &ibmvnic_netdev_ops; 4472 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4473 SET_NETDEV_DEV(netdev, &dev->dev); 4474 4475 spin_lock_init(&adapter->stats_lock); 4476 4477 INIT_LIST_HEAD(&adapter->errors); 4478 spin_lock_init(&adapter->error_list_lock); 4479 4480 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4481 INIT_LIST_HEAD(&adapter->rwi_list); 4482 mutex_init(&adapter->reset_lock); 4483 mutex_init(&adapter->rwi_lock); 4484 adapter->resetting = false; 4485 4486 adapter->mac_change_pending = false; 4487 4488 do { 4489 rc = ibmvnic_init(adapter); 4490 if (rc && rc != EAGAIN) 4491 goto ibmvnic_init_fail; 4492 } while (rc == EAGAIN); 4493 4494 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4495 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4496 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4497 4498 rc = device_create_file(&dev->dev, &dev_attr_failover); 4499 if (rc) 4500 goto ibmvnic_init_fail; 4501 4502 netif_carrier_off(netdev); 4503 rc = register_netdev(netdev); 4504 if (rc) { 4505 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4506 goto ibmvnic_register_fail; 4507 } 4508 dev_info(&dev->dev, "ibmvnic registered\n"); 4509 4510 adapter->state = VNIC_PROBED; 4511 4512 adapter->wait_for_reset = false; 4513 4514 return 0; 4515 4516 ibmvnic_register_fail: 4517 device_remove_file(&dev->dev, &dev_attr_failover); 4518 4519 ibmvnic_init_fail: 4520 release_sub_crqs(adapter, 1); 4521 release_crq_queue(adapter); 4522 free_netdev(netdev); 4523 4524 return rc; 4525 } 4526 4527 static int ibmvnic_remove(struct vio_dev *dev) 4528 { 4529 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4530 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4531 4532 adapter->state = VNIC_REMOVING; 4533 unregister_netdev(netdev); 4534 mutex_lock(&adapter->reset_lock); 4535 4536 release_resources(adapter); 4537 release_sub_crqs(adapter, 1); 4538 release_crq_queue(adapter); 4539 4540 adapter->state = VNIC_REMOVED; 4541 4542 mutex_unlock(&adapter->reset_lock); 4543 device_remove_file(&dev->dev, &dev_attr_failover); 4544 free_netdev(netdev); 4545 dev_set_drvdata(&dev->dev, NULL); 4546 4547 return 0; 4548 } 4549 4550 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4551 const char *buf, size_t count) 4552 { 4553 struct net_device *netdev = dev_get_drvdata(dev); 4554 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4555 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4556 __be64 session_token; 4557 long rc; 4558 4559 if (!sysfs_streq(buf, "1")) 4560 return -EINVAL; 4561 4562 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4563 H_GET_SESSION_TOKEN, 0, 0, 0); 4564 if (rc) { 4565 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4566 rc); 4567 return -EINVAL; 4568 } 4569 4570 session_token = (__be64)retbuf[0]; 4571 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4572 be64_to_cpu(session_token)); 4573 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4574 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4575 if (rc) { 4576 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4577 rc); 4578 return -EINVAL; 4579 } 4580 4581 return count; 4582 } 4583 4584 static DEVICE_ATTR_WO(failover); 4585 4586 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4587 { 4588 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4589 struct ibmvnic_adapter *adapter; 4590 struct iommu_table *tbl; 4591 unsigned long ret = 0; 4592 int i; 4593 4594 tbl = get_iommu_table_base(&vdev->dev); 4595 4596 /* netdev inits at probe time along with the structures we need below*/ 4597 if (!netdev) 4598 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4599 4600 adapter = netdev_priv(netdev); 4601 4602 ret += PAGE_SIZE; /* the crq message queue */ 4603 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4604 4605 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4606 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4607 4608 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4609 i++) 4610 ret += adapter->rx_pool[i].size * 4611 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4612 4613 return ret; 4614 } 4615 4616 static int ibmvnic_resume(struct device *dev) 4617 { 4618 struct net_device *netdev = dev_get_drvdata(dev); 4619 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4620 4621 if (adapter->state != VNIC_OPEN) 4622 return 0; 4623 4624 tasklet_schedule(&adapter->tasklet); 4625 4626 return 0; 4627 } 4628 4629 static const struct vio_device_id ibmvnic_device_table[] = { 4630 {"network", "IBM,vnic"}, 4631 {"", "" } 4632 }; 4633 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4634 4635 static const struct dev_pm_ops ibmvnic_pm_ops = { 4636 .resume = ibmvnic_resume 4637 }; 4638 4639 static struct vio_driver ibmvnic_driver = { 4640 .id_table = ibmvnic_device_table, 4641 .probe = ibmvnic_probe, 4642 .remove = ibmvnic_remove, 4643 .get_desired_dma = ibmvnic_get_desired_dma, 4644 .name = ibmvnic_driver_name, 4645 .pm = &ibmvnic_pm_ops, 4646 }; 4647 4648 /* module functions */ 4649 static int __init ibmvnic_module_init(void) 4650 { 4651 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4652 IBMVNIC_DRIVER_VERSION); 4653 4654 return vio_register_driver(&ibmvnic_driver); 4655 } 4656 4657 static void __exit ibmvnic_module_exit(void) 4658 { 4659 vio_unregister_driver(&ibmvnic_driver); 4660 } 4661 4662 module_init(ibmvnic_module_init); 4663 module_exit(ibmvnic_module_exit); 4664