1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static void send_request_unmap(struct ibmvnic_adapter *, u8); 114 static void send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static void release_crq_queue(struct ibmvnic_adapter *); 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 157 unsigned long length, unsigned long *number, 158 unsigned long *irq) 159 { 160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 161 long rc; 162 163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 164 *number = retbuf[0]; 165 *irq = retbuf[1]; 166 167 return rc; 168 } 169 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 171 struct ibmvnic_long_term_buff *ltb, int size) 172 { 173 struct device *dev = &adapter->vdev->dev; 174 175 ltb->size = size; 176 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 177 GFP_KERNEL); 178 179 if (!ltb->buff) { 180 dev_err(dev, "Couldn't alloc long term buffer\n"); 181 return -ENOMEM; 182 } 183 ltb->map_id = adapter->map_id; 184 adapter->map_id++; 185 186 init_completion(&adapter->fw_done); 187 send_request_map(adapter, ltb->addr, 188 ltb->size, ltb->map_id); 189 wait_for_completion(&adapter->fw_done); 190 191 if (adapter->fw_done_rc) { 192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 193 adapter->fw_done_rc); 194 return -1; 195 } 196 return 0; 197 } 198 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 200 struct ibmvnic_long_term_buff *ltb) 201 { 202 struct device *dev = &adapter->vdev->dev; 203 204 if (!ltb->buff) 205 return; 206 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 208 adapter->reset_reason != VNIC_RESET_MOBILITY) 209 send_request_unmap(adapter, ltb->map_id); 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 211 } 212 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 214 struct ibmvnic_long_term_buff *ltb) 215 { 216 memset(ltb->buff, 0, ltb->size); 217 218 init_completion(&adapter->fw_done); 219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 220 wait_for_completion(&adapter->fw_done); 221 222 if (adapter->fw_done_rc) { 223 dev_info(&adapter->vdev->dev, 224 "Reset failed, attempting to free and reallocate buffer\n"); 225 free_long_term_buff(adapter, ltb); 226 return alloc_long_term_buff(adapter, ltb, ltb->size); 227 } 228 return 0; 229 } 230 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 232 { 233 int i; 234 235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 236 i++) 237 adapter->rx_pool[i].active = 0; 238 } 239 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 241 struct ibmvnic_rx_pool *pool) 242 { 243 int count = pool->size - atomic_read(&pool->available); 244 struct device *dev = &adapter->vdev->dev; 245 int buffers_added = 0; 246 unsigned long lpar_rc; 247 union sub_crq sub_crq; 248 struct sk_buff *skb; 249 unsigned int offset; 250 dma_addr_t dma_addr; 251 unsigned char *dst; 252 u64 *handle_array; 253 int shift = 0; 254 int index; 255 int i; 256 257 if (!pool->active) 258 return; 259 260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 261 be32_to_cpu(adapter->login_rsp_buf-> 262 off_rxadd_subcrqs)); 263 264 for (i = 0; i < count; ++i) { 265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 266 if (!skb) { 267 dev_err(dev, "Couldn't replenish rx buff\n"); 268 adapter->replenish_no_mem++; 269 break; 270 } 271 272 index = pool->free_map[pool->next_free]; 273 274 if (pool->rx_buff[index].skb) 275 dev_err(dev, "Inconsistent free_map!\n"); 276 277 /* Copy the skb to the long term mapped DMA buffer */ 278 offset = index * pool->buff_size; 279 dst = pool->long_term_buff.buff + offset; 280 memset(dst, 0, pool->buff_size); 281 dma_addr = pool->long_term_buff.addr + offset; 282 pool->rx_buff[index].data = dst; 283 284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 285 pool->rx_buff[index].dma = dma_addr; 286 pool->rx_buff[index].skb = skb; 287 pool->rx_buff[index].pool_index = pool->index; 288 pool->rx_buff[index].size = pool->buff_size; 289 290 memset(&sub_crq, 0, sizeof(sub_crq)); 291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 292 sub_crq.rx_add.correlator = 293 cpu_to_be64((u64)&pool->rx_buff[index]); 294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 296 297 /* The length field of the sCRQ is defined to be 24 bits so the 298 * buffer size needs to be left shifted by a byte before it is 299 * converted to big endian to prevent the last byte from being 300 * truncated. 301 */ 302 #ifdef __LITTLE_ENDIAN__ 303 shift = 8; 304 #endif 305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 306 307 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 308 &sub_crq); 309 if (lpar_rc != H_SUCCESS) 310 goto failure; 311 312 buffers_added++; 313 adapter->replenish_add_buff_success++; 314 pool->next_free = (pool->next_free + 1) % pool->size; 315 } 316 atomic_add(buffers_added, &pool->available); 317 return; 318 319 failure: 320 dev_info(dev, "replenish pools failure\n"); 321 pool->free_map[pool->next_free] = index; 322 pool->rx_buff[index].skb = NULL; 323 if (!dma_mapping_error(dev, dma_addr)) 324 dma_unmap_single(dev, dma_addr, pool->buff_size, 325 DMA_FROM_DEVICE); 326 327 dev_kfree_skb_any(skb); 328 adapter->replenish_add_buff_failure++; 329 atomic_add(buffers_added, &pool->available); 330 331 if (lpar_rc == H_CLOSED) { 332 /* Disable buffer pool replenishment and report carrier off if 333 * queue is closed. Firmware guarantees that a signal will 334 * be sent to the driver, triggering a reset. 335 */ 336 deactivate_rx_pools(adapter); 337 netif_carrier_off(adapter->netdev); 338 } 339 } 340 341 static void replenish_pools(struct ibmvnic_adapter *adapter) 342 { 343 int i; 344 345 adapter->replenish_task_cycles++; 346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 347 i++) { 348 if (adapter->rx_pool[i].active) 349 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 350 } 351 } 352 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 354 { 355 kfree(adapter->tx_stats_buffers); 356 kfree(adapter->rx_stats_buffers); 357 } 358 359 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 360 { 361 adapter->tx_stats_buffers = 362 kcalloc(adapter->req_tx_queues, 363 sizeof(struct ibmvnic_tx_queue_stats), 364 GFP_KERNEL); 365 if (!adapter->tx_stats_buffers) 366 return -ENOMEM; 367 368 adapter->rx_stats_buffers = 369 kcalloc(adapter->req_rx_queues, 370 sizeof(struct ibmvnic_rx_queue_stats), 371 GFP_KERNEL); 372 if (!adapter->rx_stats_buffers) 373 return -ENOMEM; 374 375 return 0; 376 } 377 378 static void release_stats_token(struct ibmvnic_adapter *adapter) 379 { 380 struct device *dev = &adapter->vdev->dev; 381 382 if (!adapter->stats_token) 383 return; 384 385 dma_unmap_single(dev, adapter->stats_token, 386 sizeof(struct ibmvnic_statistics), 387 DMA_FROM_DEVICE); 388 adapter->stats_token = 0; 389 } 390 391 static int init_stats_token(struct ibmvnic_adapter *adapter) 392 { 393 struct device *dev = &adapter->vdev->dev; 394 dma_addr_t stok; 395 396 stok = dma_map_single(dev, &adapter->stats, 397 sizeof(struct ibmvnic_statistics), 398 DMA_FROM_DEVICE); 399 if (dma_mapping_error(dev, stok)) { 400 dev_err(dev, "Couldn't map stats buffer\n"); 401 return -1; 402 } 403 404 adapter->stats_token = stok; 405 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 406 return 0; 407 } 408 409 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 410 { 411 struct ibmvnic_rx_pool *rx_pool; 412 int rx_scrqs; 413 int i, j, rc; 414 415 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 416 for (i = 0; i < rx_scrqs; i++) { 417 rx_pool = &adapter->rx_pool[i]; 418 419 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 420 421 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff); 422 if (rc) 423 return rc; 424 425 for (j = 0; j < rx_pool->size; j++) 426 rx_pool->free_map[j] = j; 427 428 memset(rx_pool->rx_buff, 0, 429 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 430 431 atomic_set(&rx_pool->available, 0); 432 rx_pool->next_alloc = 0; 433 rx_pool->next_free = 0; 434 rx_pool->active = 1; 435 } 436 437 return 0; 438 } 439 440 static void release_rx_pools(struct ibmvnic_adapter *adapter) 441 { 442 struct ibmvnic_rx_pool *rx_pool; 443 int rx_scrqs; 444 int i, j; 445 446 if (!adapter->rx_pool) 447 return; 448 449 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 450 for (i = 0; i < rx_scrqs; i++) { 451 rx_pool = &adapter->rx_pool[i]; 452 453 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 454 455 kfree(rx_pool->free_map); 456 free_long_term_buff(adapter, &rx_pool->long_term_buff); 457 458 if (!rx_pool->rx_buff) 459 continue; 460 461 for (j = 0; j < rx_pool->size; j++) { 462 if (rx_pool->rx_buff[j].skb) { 463 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 464 rx_pool->rx_buff[i].skb = NULL; 465 } 466 } 467 468 kfree(rx_pool->rx_buff); 469 } 470 471 kfree(adapter->rx_pool); 472 adapter->rx_pool = NULL; 473 } 474 475 static int init_rx_pools(struct net_device *netdev) 476 { 477 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 478 struct device *dev = &adapter->vdev->dev; 479 struct ibmvnic_rx_pool *rx_pool; 480 int rxadd_subcrqs; 481 u64 *size_array; 482 int i, j; 483 484 rxadd_subcrqs = 485 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 486 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 487 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 488 489 adapter->rx_pool = kcalloc(rxadd_subcrqs, 490 sizeof(struct ibmvnic_rx_pool), 491 GFP_KERNEL); 492 if (!adapter->rx_pool) { 493 dev_err(dev, "Failed to allocate rx pools\n"); 494 return -1; 495 } 496 497 for (i = 0; i < rxadd_subcrqs; i++) { 498 rx_pool = &adapter->rx_pool[i]; 499 500 netdev_dbg(adapter->netdev, 501 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 502 i, adapter->req_rx_add_entries_per_subcrq, 503 be64_to_cpu(size_array[i])); 504 505 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 506 rx_pool->index = i; 507 rx_pool->buff_size = be64_to_cpu(size_array[i]); 508 rx_pool->active = 1; 509 510 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 511 GFP_KERNEL); 512 if (!rx_pool->free_map) { 513 release_rx_pools(adapter); 514 return -1; 515 } 516 517 rx_pool->rx_buff = kcalloc(rx_pool->size, 518 sizeof(struct ibmvnic_rx_buff), 519 GFP_KERNEL); 520 if (!rx_pool->rx_buff) { 521 dev_err(dev, "Couldn't alloc rx buffers\n"); 522 release_rx_pools(adapter); 523 return -1; 524 } 525 526 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 527 rx_pool->size * rx_pool->buff_size)) { 528 release_rx_pools(adapter); 529 return -1; 530 } 531 532 for (j = 0; j < rx_pool->size; ++j) 533 rx_pool->free_map[j] = j; 534 535 atomic_set(&rx_pool->available, 0); 536 rx_pool->next_alloc = 0; 537 rx_pool->next_free = 0; 538 } 539 540 return 0; 541 } 542 543 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 544 { 545 struct ibmvnic_tx_pool *tx_pool; 546 int tx_scrqs; 547 int i, j, rc; 548 549 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 550 for (i = 0; i < tx_scrqs; i++) { 551 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i); 552 553 tx_pool = &adapter->tx_pool[i]; 554 555 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 556 if (rc) 557 return rc; 558 559 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb); 560 if (rc) 561 return rc; 562 563 memset(tx_pool->tx_buff, 0, 564 adapter->req_tx_entries_per_subcrq * 565 sizeof(struct ibmvnic_tx_buff)); 566 567 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 568 tx_pool->free_map[j] = j; 569 570 tx_pool->consumer_index = 0; 571 tx_pool->producer_index = 0; 572 tx_pool->tso_index = 0; 573 } 574 575 return 0; 576 } 577 578 static void release_vpd_data(struct ibmvnic_adapter *adapter) 579 { 580 if (!adapter->vpd) 581 return; 582 583 kfree(adapter->vpd->buff); 584 kfree(adapter->vpd); 585 } 586 587 static void release_tx_pools(struct ibmvnic_adapter *adapter) 588 { 589 struct ibmvnic_tx_pool *tx_pool; 590 int i, tx_scrqs; 591 592 if (!adapter->tx_pool) 593 return; 594 595 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 596 for (i = 0; i < tx_scrqs; i++) { 597 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i); 598 tx_pool = &adapter->tx_pool[i]; 599 kfree(tx_pool->tx_buff); 600 free_long_term_buff(adapter, &tx_pool->long_term_buff); 601 free_long_term_buff(adapter, &tx_pool->tso_ltb); 602 kfree(tx_pool->free_map); 603 } 604 605 kfree(adapter->tx_pool); 606 adapter->tx_pool = NULL; 607 } 608 609 static int init_tx_pools(struct net_device *netdev) 610 { 611 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 612 struct device *dev = &adapter->vdev->dev; 613 struct ibmvnic_tx_pool *tx_pool; 614 int tx_subcrqs; 615 int i, j; 616 617 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 618 adapter->tx_pool = kcalloc(tx_subcrqs, 619 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 620 if (!adapter->tx_pool) 621 return -1; 622 623 for (i = 0; i < tx_subcrqs; i++) { 624 tx_pool = &adapter->tx_pool[i]; 625 626 netdev_dbg(adapter->netdev, 627 "Initializing tx_pool[%d], %lld buffs\n", 628 i, adapter->req_tx_entries_per_subcrq); 629 630 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 631 sizeof(struct ibmvnic_tx_buff), 632 GFP_KERNEL); 633 if (!tx_pool->tx_buff) { 634 dev_err(dev, "tx pool buffer allocation failed\n"); 635 release_tx_pools(adapter); 636 return -1; 637 } 638 639 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 640 adapter->req_tx_entries_per_subcrq * 641 adapter->req_mtu)) { 642 release_tx_pools(adapter); 643 return -1; 644 } 645 646 /* alloc TSO ltb */ 647 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb, 648 IBMVNIC_TSO_BUFS * 649 IBMVNIC_TSO_BUF_SZ)) { 650 release_tx_pools(adapter); 651 return -1; 652 } 653 654 tx_pool->tso_index = 0; 655 656 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 657 sizeof(int), GFP_KERNEL); 658 if (!tx_pool->free_map) { 659 release_tx_pools(adapter); 660 return -1; 661 } 662 663 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 664 tx_pool->free_map[j] = j; 665 666 tx_pool->consumer_index = 0; 667 tx_pool->producer_index = 0; 668 } 669 670 return 0; 671 } 672 673 static void release_error_buffers(struct ibmvnic_adapter *adapter) 674 { 675 struct device *dev = &adapter->vdev->dev; 676 struct ibmvnic_error_buff *error_buff, *tmp; 677 unsigned long flags; 678 679 spin_lock_irqsave(&adapter->error_list_lock, flags); 680 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 681 list_del(&error_buff->list); 682 dma_unmap_single(dev, error_buff->dma, error_buff->len, 683 DMA_FROM_DEVICE); 684 kfree(error_buff->buff); 685 kfree(error_buff); 686 } 687 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 688 } 689 690 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 691 { 692 int i; 693 694 if (adapter->napi_enabled) 695 return; 696 697 for (i = 0; i < adapter->req_rx_queues; i++) 698 napi_enable(&adapter->napi[i]); 699 700 adapter->napi_enabled = true; 701 } 702 703 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 704 { 705 int i; 706 707 if (!adapter->napi_enabled) 708 return; 709 710 for (i = 0; i < adapter->req_rx_queues; i++) { 711 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 712 napi_disable(&adapter->napi[i]); 713 } 714 715 adapter->napi_enabled = false; 716 } 717 718 static int ibmvnic_login(struct net_device *netdev) 719 { 720 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 721 unsigned long timeout = msecs_to_jiffies(30000); 722 struct device *dev = &adapter->vdev->dev; 723 int rc; 724 725 do { 726 if (adapter->renegotiate) { 727 adapter->renegotiate = false; 728 release_sub_crqs(adapter); 729 730 reinit_completion(&adapter->init_done); 731 send_cap_queries(adapter); 732 if (!wait_for_completion_timeout(&adapter->init_done, 733 timeout)) { 734 dev_err(dev, "Capabilities query timeout\n"); 735 return -1; 736 } 737 rc = init_sub_crqs(adapter); 738 if (rc) { 739 dev_err(dev, 740 "Initialization of SCRQ's failed\n"); 741 return -1; 742 } 743 rc = init_sub_crq_irqs(adapter); 744 if (rc) { 745 dev_err(dev, 746 "Initialization of SCRQ's irqs failed\n"); 747 return -1; 748 } 749 } 750 751 reinit_completion(&adapter->init_done); 752 send_login(adapter); 753 if (!wait_for_completion_timeout(&adapter->init_done, 754 timeout)) { 755 dev_err(dev, "Login timeout\n"); 756 return -1; 757 } 758 } while (adapter->renegotiate); 759 760 return 0; 761 } 762 763 static void release_resources(struct ibmvnic_adapter *adapter) 764 { 765 int i; 766 767 release_vpd_data(adapter); 768 769 release_tx_pools(adapter); 770 release_rx_pools(adapter); 771 772 release_stats_token(adapter); 773 release_stats_buffers(adapter); 774 release_error_buffers(adapter); 775 776 if (adapter->napi) { 777 for (i = 0; i < adapter->req_rx_queues; i++) { 778 if (&adapter->napi[i]) { 779 netdev_dbg(adapter->netdev, 780 "Releasing napi[%d]\n", i); 781 netif_napi_del(&adapter->napi[i]); 782 } 783 } 784 } 785 } 786 787 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 788 { 789 struct net_device *netdev = adapter->netdev; 790 unsigned long timeout = msecs_to_jiffies(30000); 791 union ibmvnic_crq crq; 792 bool resend; 793 int rc; 794 795 netdev_dbg(netdev, "setting link state %d\n", link_state); 796 797 memset(&crq, 0, sizeof(crq)); 798 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 799 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 800 crq.logical_link_state.link_state = link_state; 801 802 do { 803 resend = false; 804 805 reinit_completion(&adapter->init_done); 806 rc = ibmvnic_send_crq(adapter, &crq); 807 if (rc) { 808 netdev_err(netdev, "Failed to set link state\n"); 809 return rc; 810 } 811 812 if (!wait_for_completion_timeout(&adapter->init_done, 813 timeout)) { 814 netdev_err(netdev, "timeout setting link state\n"); 815 return -1; 816 } 817 818 if (adapter->init_done_rc == 1) { 819 /* Partuial success, delay and re-send */ 820 mdelay(1000); 821 resend = true; 822 } 823 } while (resend); 824 825 return 0; 826 } 827 828 static int set_real_num_queues(struct net_device *netdev) 829 { 830 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 831 int rc; 832 833 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 834 adapter->req_tx_queues, adapter->req_rx_queues); 835 836 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 837 if (rc) { 838 netdev_err(netdev, "failed to set the number of tx queues\n"); 839 return rc; 840 } 841 842 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 843 if (rc) 844 netdev_err(netdev, "failed to set the number of rx queues\n"); 845 846 return rc; 847 } 848 849 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 850 { 851 struct device *dev = &adapter->vdev->dev; 852 union ibmvnic_crq crq; 853 int len = 0; 854 855 if (adapter->vpd->buff) 856 len = adapter->vpd->len; 857 858 reinit_completion(&adapter->fw_done); 859 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 860 crq.get_vpd_size.cmd = GET_VPD_SIZE; 861 ibmvnic_send_crq(adapter, &crq); 862 wait_for_completion(&adapter->fw_done); 863 864 if (!adapter->vpd->len) 865 return -ENODATA; 866 867 if (!adapter->vpd->buff) 868 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 869 else if (adapter->vpd->len != len) 870 adapter->vpd->buff = 871 krealloc(adapter->vpd->buff, 872 adapter->vpd->len, GFP_KERNEL); 873 874 if (!adapter->vpd->buff) { 875 dev_err(dev, "Could allocate VPD buffer\n"); 876 return -ENOMEM; 877 } 878 879 adapter->vpd->dma_addr = 880 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 881 DMA_FROM_DEVICE); 882 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 883 dev_err(dev, "Could not map VPD buffer\n"); 884 kfree(adapter->vpd->buff); 885 return -ENOMEM; 886 } 887 888 reinit_completion(&adapter->fw_done); 889 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 890 crq.get_vpd.cmd = GET_VPD; 891 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 892 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 893 ibmvnic_send_crq(adapter, &crq); 894 wait_for_completion(&adapter->fw_done); 895 896 return 0; 897 } 898 899 static int init_resources(struct ibmvnic_adapter *adapter) 900 { 901 struct net_device *netdev = adapter->netdev; 902 int i, rc; 903 904 rc = set_real_num_queues(netdev); 905 if (rc) 906 return rc; 907 908 rc = init_stats_buffers(adapter); 909 if (rc) 910 return rc; 911 912 rc = init_stats_token(adapter); 913 if (rc) 914 return rc; 915 916 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 917 if (!adapter->vpd) 918 return -ENOMEM; 919 920 adapter->map_id = 1; 921 adapter->napi = kcalloc(adapter->req_rx_queues, 922 sizeof(struct napi_struct), GFP_KERNEL); 923 if (!adapter->napi) 924 return -ENOMEM; 925 926 for (i = 0; i < adapter->req_rx_queues; i++) { 927 netdev_dbg(netdev, "Adding napi[%d]\n", i); 928 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 929 NAPI_POLL_WEIGHT); 930 } 931 932 send_map_query(adapter); 933 934 rc = init_rx_pools(netdev); 935 if (rc) 936 return rc; 937 938 rc = init_tx_pools(netdev); 939 return rc; 940 } 941 942 static int __ibmvnic_open(struct net_device *netdev) 943 { 944 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 945 enum vnic_state prev_state = adapter->state; 946 int i, rc; 947 948 adapter->state = VNIC_OPENING; 949 replenish_pools(adapter); 950 ibmvnic_napi_enable(adapter); 951 952 /* We're ready to receive frames, enable the sub-crq interrupts and 953 * set the logical link state to up 954 */ 955 for (i = 0; i < adapter->req_rx_queues; i++) { 956 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 957 if (prev_state == VNIC_CLOSED) 958 enable_irq(adapter->rx_scrq[i]->irq); 959 else 960 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 961 } 962 963 for (i = 0; i < adapter->req_tx_queues; i++) { 964 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 965 if (prev_state == VNIC_CLOSED) 966 enable_irq(adapter->tx_scrq[i]->irq); 967 else 968 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 969 } 970 971 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 972 if (rc) { 973 for (i = 0; i < adapter->req_rx_queues; i++) 974 napi_disable(&adapter->napi[i]); 975 release_resources(adapter); 976 return rc; 977 } 978 979 netif_tx_start_all_queues(netdev); 980 981 if (prev_state == VNIC_CLOSED) { 982 for (i = 0; i < adapter->req_rx_queues; i++) 983 napi_schedule(&adapter->napi[i]); 984 } 985 986 adapter->state = VNIC_OPEN; 987 return rc; 988 } 989 990 static int ibmvnic_open(struct net_device *netdev) 991 { 992 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 993 int rc, vpd; 994 995 mutex_lock(&adapter->reset_lock); 996 997 if (adapter->mac_change_pending) { 998 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 999 adapter->mac_change_pending = false; 1000 } 1001 1002 if (adapter->state != VNIC_CLOSED) { 1003 rc = ibmvnic_login(netdev); 1004 if (rc) { 1005 mutex_unlock(&adapter->reset_lock); 1006 return rc; 1007 } 1008 1009 rc = init_resources(adapter); 1010 if (rc) { 1011 netdev_err(netdev, "failed to initialize resources\n"); 1012 release_resources(adapter); 1013 mutex_unlock(&adapter->reset_lock); 1014 return rc; 1015 } 1016 } 1017 1018 rc = __ibmvnic_open(netdev); 1019 netif_carrier_on(netdev); 1020 1021 /* Vital Product Data (VPD) */ 1022 vpd = ibmvnic_get_vpd(adapter); 1023 if (vpd) 1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1025 1026 mutex_unlock(&adapter->reset_lock); 1027 1028 return rc; 1029 } 1030 1031 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1032 { 1033 struct ibmvnic_tx_pool *tx_pool; 1034 u64 tx_entries; 1035 int tx_scrqs; 1036 int i, j; 1037 1038 if (!adapter->tx_pool) 1039 return; 1040 1041 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 1042 tx_entries = adapter->req_tx_entries_per_subcrq; 1043 1044 /* Free any remaining skbs in the tx buffer pools */ 1045 for (i = 0; i < tx_scrqs; i++) { 1046 tx_pool = &adapter->tx_pool[i]; 1047 if (!tx_pool) 1048 continue; 1049 1050 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1051 for (j = 0; j < tx_entries; j++) { 1052 if (tx_pool->tx_buff[j].skb) { 1053 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 1054 tx_pool->tx_buff[j].skb = NULL; 1055 } 1056 } 1057 } 1058 } 1059 1060 static int __ibmvnic_close(struct net_device *netdev) 1061 { 1062 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1063 int rc = 0; 1064 int i; 1065 1066 adapter->state = VNIC_CLOSING; 1067 1068 /* ensure that transmissions are stopped if called by do_reset */ 1069 if (adapter->resetting) 1070 netif_tx_disable(netdev); 1071 else 1072 netif_tx_stop_all_queues(netdev); 1073 1074 ibmvnic_napi_disable(adapter); 1075 1076 if (adapter->tx_scrq) { 1077 for (i = 0; i < adapter->req_tx_queues; i++) 1078 if (adapter->tx_scrq[i]->irq) { 1079 netdev_dbg(adapter->netdev, 1080 "Disabling tx_scrq[%d] irq\n", i); 1081 disable_irq(adapter->tx_scrq[i]->irq); 1082 } 1083 } 1084 1085 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1086 if (rc) 1087 return rc; 1088 1089 if (adapter->rx_scrq) { 1090 for (i = 0; i < adapter->req_rx_queues; i++) { 1091 int retries = 10; 1092 1093 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 1094 retries--; 1095 mdelay(100); 1096 1097 if (retries == 0) 1098 break; 1099 } 1100 1101 if (adapter->rx_scrq[i]->irq) { 1102 netdev_dbg(adapter->netdev, 1103 "Disabling rx_scrq[%d] irq\n", i); 1104 disable_irq(adapter->rx_scrq[i]->irq); 1105 } 1106 } 1107 } 1108 1109 clean_tx_pools(adapter); 1110 adapter->state = VNIC_CLOSED; 1111 return rc; 1112 } 1113 1114 static int ibmvnic_close(struct net_device *netdev) 1115 { 1116 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1117 int rc; 1118 1119 mutex_lock(&adapter->reset_lock); 1120 rc = __ibmvnic_close(netdev); 1121 mutex_unlock(&adapter->reset_lock); 1122 1123 return rc; 1124 } 1125 1126 /** 1127 * build_hdr_data - creates L2/L3/L4 header data buffer 1128 * @hdr_field - bitfield determining needed headers 1129 * @skb - socket buffer 1130 * @hdr_len - array of header lengths 1131 * @tot_len - total length of data 1132 * 1133 * Reads hdr_field to determine which headers are needed by firmware. 1134 * Builds a buffer containing these headers. Saves individual header 1135 * lengths and total buffer length to be used to build descriptors. 1136 */ 1137 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1138 int *hdr_len, u8 *hdr_data) 1139 { 1140 int len = 0; 1141 u8 *hdr; 1142 1143 hdr_len[0] = sizeof(struct ethhdr); 1144 1145 if (skb->protocol == htons(ETH_P_IP)) { 1146 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1147 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1148 hdr_len[2] = tcp_hdrlen(skb); 1149 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1150 hdr_len[2] = sizeof(struct udphdr); 1151 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1152 hdr_len[1] = sizeof(struct ipv6hdr); 1153 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1154 hdr_len[2] = tcp_hdrlen(skb); 1155 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1156 hdr_len[2] = sizeof(struct udphdr); 1157 } else if (skb->protocol == htons(ETH_P_ARP)) { 1158 hdr_len[1] = arp_hdr_len(skb->dev); 1159 hdr_len[2] = 0; 1160 } 1161 1162 memset(hdr_data, 0, 120); 1163 if ((hdr_field >> 6) & 1) { 1164 hdr = skb_mac_header(skb); 1165 memcpy(hdr_data, hdr, hdr_len[0]); 1166 len += hdr_len[0]; 1167 } 1168 1169 if ((hdr_field >> 5) & 1) { 1170 hdr = skb_network_header(skb); 1171 memcpy(hdr_data + len, hdr, hdr_len[1]); 1172 len += hdr_len[1]; 1173 } 1174 1175 if ((hdr_field >> 4) & 1) { 1176 hdr = skb_transport_header(skb); 1177 memcpy(hdr_data + len, hdr, hdr_len[2]); 1178 len += hdr_len[2]; 1179 } 1180 return len; 1181 } 1182 1183 /** 1184 * create_hdr_descs - create header and header extension descriptors 1185 * @hdr_field - bitfield determining needed headers 1186 * @data - buffer containing header data 1187 * @len - length of data buffer 1188 * @hdr_len - array of individual header lengths 1189 * @scrq_arr - descriptor array 1190 * 1191 * Creates header and, if needed, header extension descriptors and 1192 * places them in a descriptor array, scrq_arr 1193 */ 1194 1195 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1196 union sub_crq *scrq_arr) 1197 { 1198 union sub_crq hdr_desc; 1199 int tmp_len = len; 1200 int num_descs = 0; 1201 u8 *data, *cur; 1202 int tmp; 1203 1204 while (tmp_len > 0) { 1205 cur = hdr_data + len - tmp_len; 1206 1207 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1208 if (cur != hdr_data) { 1209 data = hdr_desc.hdr_ext.data; 1210 tmp = tmp_len > 29 ? 29 : tmp_len; 1211 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1212 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1213 hdr_desc.hdr_ext.len = tmp; 1214 } else { 1215 data = hdr_desc.hdr.data; 1216 tmp = tmp_len > 24 ? 24 : tmp_len; 1217 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1218 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1219 hdr_desc.hdr.len = tmp; 1220 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1221 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1222 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1223 hdr_desc.hdr.flag = hdr_field << 1; 1224 } 1225 memcpy(data, cur, tmp); 1226 tmp_len -= tmp; 1227 *scrq_arr = hdr_desc; 1228 scrq_arr++; 1229 num_descs++; 1230 } 1231 1232 return num_descs; 1233 } 1234 1235 /** 1236 * build_hdr_descs_arr - build a header descriptor array 1237 * @skb - socket buffer 1238 * @num_entries - number of descriptors to be sent 1239 * @subcrq - first TX descriptor 1240 * @hdr_field - bit field determining which headers will be sent 1241 * 1242 * This function will build a TX descriptor array with applicable 1243 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1244 */ 1245 1246 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1247 int *num_entries, u8 hdr_field) 1248 { 1249 int hdr_len[3] = {0, 0, 0}; 1250 int tot_len; 1251 u8 *hdr_data = txbuff->hdr_data; 1252 1253 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1254 txbuff->hdr_data); 1255 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1256 txbuff->indir_arr + 1); 1257 } 1258 1259 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1260 { 1261 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1262 int queue_num = skb_get_queue_mapping(skb); 1263 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1264 struct device *dev = &adapter->vdev->dev; 1265 struct ibmvnic_tx_buff *tx_buff = NULL; 1266 struct ibmvnic_sub_crq_queue *tx_scrq; 1267 struct ibmvnic_tx_pool *tx_pool; 1268 unsigned int tx_send_failed = 0; 1269 unsigned int tx_map_failed = 0; 1270 unsigned int tx_dropped = 0; 1271 unsigned int tx_packets = 0; 1272 unsigned int tx_bytes = 0; 1273 dma_addr_t data_dma_addr; 1274 struct netdev_queue *txq; 1275 unsigned long lpar_rc; 1276 union sub_crq tx_crq; 1277 unsigned int offset; 1278 int num_entries = 1; 1279 unsigned char *dst; 1280 u64 *handle_array; 1281 int index = 0; 1282 int ret = 0; 1283 1284 if (adapter->resetting) { 1285 if (!netif_subqueue_stopped(netdev, skb)) 1286 netif_stop_subqueue(netdev, queue_num); 1287 dev_kfree_skb_any(skb); 1288 1289 tx_send_failed++; 1290 tx_dropped++; 1291 ret = NETDEV_TX_OK; 1292 goto out; 1293 } 1294 1295 tx_pool = &adapter->tx_pool[queue_num]; 1296 tx_scrq = adapter->tx_scrq[queue_num]; 1297 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1298 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1299 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1300 1301 index = tx_pool->free_map[tx_pool->consumer_index]; 1302 1303 if (skb_is_gso(skb)) { 1304 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ; 1305 dst = tx_pool->tso_ltb.buff + offset; 1306 memset(dst, 0, IBMVNIC_TSO_BUF_SZ); 1307 data_dma_addr = tx_pool->tso_ltb.addr + offset; 1308 tx_pool->tso_index++; 1309 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS) 1310 tx_pool->tso_index = 0; 1311 } else { 1312 offset = index * adapter->req_mtu; 1313 dst = tx_pool->long_term_buff.buff + offset; 1314 memset(dst, 0, adapter->req_mtu); 1315 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1316 } 1317 1318 if (skb_shinfo(skb)->nr_frags) { 1319 int cur, i; 1320 1321 /* Copy the head */ 1322 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1323 cur = skb_headlen(skb); 1324 1325 /* Copy the frags */ 1326 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1327 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1328 1329 memcpy(dst + cur, 1330 page_address(skb_frag_page(frag)) + 1331 frag->page_offset, skb_frag_size(frag)); 1332 cur += skb_frag_size(frag); 1333 } 1334 } else { 1335 skb_copy_from_linear_data(skb, dst, skb->len); 1336 } 1337 1338 tx_pool->consumer_index = 1339 (tx_pool->consumer_index + 1) % 1340 adapter->req_tx_entries_per_subcrq; 1341 1342 tx_buff = &tx_pool->tx_buff[index]; 1343 tx_buff->skb = skb; 1344 tx_buff->data_dma[0] = data_dma_addr; 1345 tx_buff->data_len[0] = skb->len; 1346 tx_buff->index = index; 1347 tx_buff->pool_index = queue_num; 1348 tx_buff->last_frag = true; 1349 1350 memset(&tx_crq, 0, sizeof(tx_crq)); 1351 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1352 tx_crq.v1.type = IBMVNIC_TX_DESC; 1353 tx_crq.v1.n_crq_elem = 1; 1354 tx_crq.v1.n_sge = 1; 1355 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1356 tx_crq.v1.correlator = cpu_to_be32(index); 1357 if (skb_is_gso(skb)) 1358 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id); 1359 else 1360 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1361 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1362 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1363 1364 if (adapter->vlan_header_insertion) { 1365 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1366 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1367 } 1368 1369 if (skb->protocol == htons(ETH_P_IP)) { 1370 if (ip_hdr(skb)->version == 4) 1371 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1372 else if (ip_hdr(skb)->version == 6) 1373 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1374 1375 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1376 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1377 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 1378 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1379 } 1380 1381 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1382 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1383 hdrs += 2; 1384 } 1385 if (skb_is_gso(skb)) { 1386 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1387 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1388 hdrs += 2; 1389 } 1390 /* determine if l2/3/4 headers are sent to firmware */ 1391 if ((*hdrs >> 7) & 1 && 1392 (skb->protocol == htons(ETH_P_IP) || 1393 skb->protocol == htons(ETH_P_IPV6) || 1394 skb->protocol == htons(ETH_P_ARP))) { 1395 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1396 tx_crq.v1.n_crq_elem = num_entries; 1397 tx_buff->indir_arr[0] = tx_crq; 1398 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1399 sizeof(tx_buff->indir_arr), 1400 DMA_TO_DEVICE); 1401 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1402 dev_kfree_skb_any(skb); 1403 tx_buff->skb = NULL; 1404 if (!firmware_has_feature(FW_FEATURE_CMO)) 1405 dev_err(dev, "tx: unable to map descriptor array\n"); 1406 tx_map_failed++; 1407 tx_dropped++; 1408 ret = NETDEV_TX_OK; 1409 goto out; 1410 } 1411 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1412 (u64)tx_buff->indir_dma, 1413 (u64)num_entries); 1414 } else { 1415 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1416 &tx_crq); 1417 } 1418 if (lpar_rc != H_SUCCESS) { 1419 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1420 1421 if (tx_pool->consumer_index == 0) 1422 tx_pool->consumer_index = 1423 adapter->req_tx_entries_per_subcrq - 1; 1424 else 1425 tx_pool->consumer_index--; 1426 1427 dev_kfree_skb_any(skb); 1428 tx_buff->skb = NULL; 1429 1430 if (lpar_rc == H_CLOSED) { 1431 /* Disable TX and report carrier off if queue is closed. 1432 * Firmware guarantees that a signal will be sent to the 1433 * driver, triggering a reset or some other action. 1434 */ 1435 netif_tx_stop_all_queues(netdev); 1436 netif_carrier_off(netdev); 1437 } 1438 1439 tx_send_failed++; 1440 tx_dropped++; 1441 ret = NETDEV_TX_OK; 1442 goto out; 1443 } 1444 1445 if (atomic_inc_return(&tx_scrq->used) 1446 >= adapter->req_tx_entries_per_subcrq) { 1447 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1448 netif_stop_subqueue(netdev, queue_num); 1449 } 1450 1451 tx_packets++; 1452 tx_bytes += skb->len; 1453 txq->trans_start = jiffies; 1454 ret = NETDEV_TX_OK; 1455 1456 out: 1457 netdev->stats.tx_dropped += tx_dropped; 1458 netdev->stats.tx_bytes += tx_bytes; 1459 netdev->stats.tx_packets += tx_packets; 1460 adapter->tx_send_failed += tx_send_failed; 1461 adapter->tx_map_failed += tx_map_failed; 1462 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1463 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1464 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1465 1466 return ret; 1467 } 1468 1469 static void ibmvnic_set_multi(struct net_device *netdev) 1470 { 1471 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1472 struct netdev_hw_addr *ha; 1473 union ibmvnic_crq crq; 1474 1475 memset(&crq, 0, sizeof(crq)); 1476 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1477 crq.request_capability.cmd = REQUEST_CAPABILITY; 1478 1479 if (netdev->flags & IFF_PROMISC) { 1480 if (!adapter->promisc_supported) 1481 return; 1482 } else { 1483 if (netdev->flags & IFF_ALLMULTI) { 1484 /* Accept all multicast */ 1485 memset(&crq, 0, sizeof(crq)); 1486 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1487 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1488 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1489 ibmvnic_send_crq(adapter, &crq); 1490 } else if (netdev_mc_empty(netdev)) { 1491 /* Reject all multicast */ 1492 memset(&crq, 0, sizeof(crq)); 1493 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1494 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1495 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1496 ibmvnic_send_crq(adapter, &crq); 1497 } else { 1498 /* Accept one or more multicast(s) */ 1499 netdev_for_each_mc_addr(ha, netdev) { 1500 memset(&crq, 0, sizeof(crq)); 1501 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1502 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1503 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1504 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1505 ha->addr); 1506 ibmvnic_send_crq(adapter, &crq); 1507 } 1508 } 1509 } 1510 } 1511 1512 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1513 { 1514 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1515 struct sockaddr *addr = p; 1516 union ibmvnic_crq crq; 1517 1518 if (!is_valid_ether_addr(addr->sa_data)) 1519 return -EADDRNOTAVAIL; 1520 1521 memset(&crq, 0, sizeof(crq)); 1522 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1523 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1524 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1525 ibmvnic_send_crq(adapter, &crq); 1526 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1527 return 0; 1528 } 1529 1530 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1531 { 1532 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1533 struct sockaddr *addr = p; 1534 1535 if (adapter->state != VNIC_OPEN) { 1536 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1537 adapter->mac_change_pending = true; 1538 return 0; 1539 } 1540 1541 __ibmvnic_set_mac(netdev, addr); 1542 1543 return 0; 1544 } 1545 1546 /** 1547 * do_reset returns zero if we are able to keep processing reset events, or 1548 * non-zero if we hit a fatal error and must halt. 1549 */ 1550 static int do_reset(struct ibmvnic_adapter *adapter, 1551 struct ibmvnic_rwi *rwi, u32 reset_state) 1552 { 1553 struct net_device *netdev = adapter->netdev; 1554 int i, rc; 1555 1556 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1557 rwi->reset_reason); 1558 1559 netif_carrier_off(netdev); 1560 adapter->reset_reason = rwi->reset_reason; 1561 1562 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1563 rc = ibmvnic_reenable_crq_queue(adapter); 1564 if (rc) 1565 return 0; 1566 } 1567 1568 rc = __ibmvnic_close(netdev); 1569 if (rc) 1570 return rc; 1571 1572 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1573 adapter->wait_for_reset) { 1574 release_resources(adapter); 1575 release_sub_crqs(adapter); 1576 release_crq_queue(adapter); 1577 } 1578 1579 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1580 /* remove the closed state so when we call open it appears 1581 * we are coming from the probed state. 1582 */ 1583 adapter->state = VNIC_PROBED; 1584 1585 rc = ibmvnic_init(adapter); 1586 if (rc) 1587 return IBMVNIC_INIT_FAILED; 1588 1589 /* If the adapter was in PROBE state prior to the reset, 1590 * exit here. 1591 */ 1592 if (reset_state == VNIC_PROBED) 1593 return 0; 1594 1595 rc = ibmvnic_login(netdev); 1596 if (rc) { 1597 adapter->state = VNIC_PROBED; 1598 return 0; 1599 } 1600 1601 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1602 adapter->wait_for_reset) { 1603 rc = init_resources(adapter); 1604 if (rc) 1605 return rc; 1606 } else { 1607 rc = reset_tx_pools(adapter); 1608 if (rc) 1609 return rc; 1610 1611 rc = reset_rx_pools(adapter); 1612 if (rc) 1613 return rc; 1614 1615 if (reset_state == VNIC_CLOSED) 1616 return 0; 1617 } 1618 } 1619 1620 rc = __ibmvnic_open(netdev); 1621 if (rc) { 1622 if (list_empty(&adapter->rwi_list)) 1623 adapter->state = VNIC_CLOSED; 1624 else 1625 adapter->state = reset_state; 1626 1627 return 0; 1628 } 1629 1630 netif_carrier_on(netdev); 1631 1632 /* kick napi */ 1633 for (i = 0; i < adapter->req_rx_queues; i++) 1634 napi_schedule(&adapter->napi[i]); 1635 1636 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1637 netdev_notify_peers(netdev); 1638 1639 return 0; 1640 } 1641 1642 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1643 { 1644 struct ibmvnic_rwi *rwi; 1645 1646 mutex_lock(&adapter->rwi_lock); 1647 1648 if (!list_empty(&adapter->rwi_list)) { 1649 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1650 list); 1651 list_del(&rwi->list); 1652 } else { 1653 rwi = NULL; 1654 } 1655 1656 mutex_unlock(&adapter->rwi_lock); 1657 return rwi; 1658 } 1659 1660 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1661 { 1662 struct ibmvnic_rwi *rwi; 1663 1664 rwi = get_next_rwi(adapter); 1665 while (rwi) { 1666 kfree(rwi); 1667 rwi = get_next_rwi(adapter); 1668 } 1669 } 1670 1671 static void __ibmvnic_reset(struct work_struct *work) 1672 { 1673 struct ibmvnic_rwi *rwi; 1674 struct ibmvnic_adapter *adapter; 1675 struct net_device *netdev; 1676 u32 reset_state; 1677 int rc = 0; 1678 1679 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1680 netdev = adapter->netdev; 1681 1682 mutex_lock(&adapter->reset_lock); 1683 adapter->resetting = true; 1684 reset_state = adapter->state; 1685 1686 rwi = get_next_rwi(adapter); 1687 while (rwi) { 1688 rc = do_reset(adapter, rwi, reset_state); 1689 kfree(rwi); 1690 if (rc && rc != IBMVNIC_INIT_FAILED) 1691 break; 1692 1693 rwi = get_next_rwi(adapter); 1694 } 1695 1696 if (adapter->wait_for_reset) { 1697 adapter->wait_for_reset = false; 1698 adapter->reset_done_rc = rc; 1699 complete(&adapter->reset_done); 1700 } 1701 1702 if (rc) { 1703 netdev_dbg(adapter->netdev, "Reset failed\n"); 1704 free_all_rwi(adapter); 1705 mutex_unlock(&adapter->reset_lock); 1706 return; 1707 } 1708 1709 adapter->resetting = false; 1710 mutex_unlock(&adapter->reset_lock); 1711 } 1712 1713 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1714 enum ibmvnic_reset_reason reason) 1715 { 1716 struct ibmvnic_rwi *rwi, *tmp; 1717 struct net_device *netdev = adapter->netdev; 1718 struct list_head *entry; 1719 1720 if (adapter->state == VNIC_REMOVING || 1721 adapter->state == VNIC_REMOVED) { 1722 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1723 return; 1724 } 1725 1726 if (adapter->state == VNIC_PROBING) { 1727 netdev_warn(netdev, "Adapter reset during probe\n"); 1728 adapter->init_done_rc = EAGAIN; 1729 return; 1730 } 1731 1732 mutex_lock(&adapter->rwi_lock); 1733 1734 list_for_each(entry, &adapter->rwi_list) { 1735 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1736 if (tmp->reset_reason == reason) { 1737 netdev_dbg(netdev, "Skipping matching reset\n"); 1738 mutex_unlock(&adapter->rwi_lock); 1739 return; 1740 } 1741 } 1742 1743 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1744 if (!rwi) { 1745 mutex_unlock(&adapter->rwi_lock); 1746 ibmvnic_close(netdev); 1747 return; 1748 } 1749 1750 rwi->reset_reason = reason; 1751 list_add_tail(&rwi->list, &adapter->rwi_list); 1752 mutex_unlock(&adapter->rwi_lock); 1753 1754 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 1755 schedule_work(&adapter->ibmvnic_reset); 1756 } 1757 1758 static void ibmvnic_tx_timeout(struct net_device *dev) 1759 { 1760 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1761 1762 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1763 } 1764 1765 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1766 struct ibmvnic_rx_buff *rx_buff) 1767 { 1768 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1769 1770 rx_buff->skb = NULL; 1771 1772 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1773 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1774 1775 atomic_dec(&pool->available); 1776 } 1777 1778 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1779 { 1780 struct net_device *netdev = napi->dev; 1781 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1782 int scrq_num = (int)(napi - adapter->napi); 1783 int frames_processed = 0; 1784 1785 restart_poll: 1786 while (frames_processed < budget) { 1787 struct sk_buff *skb; 1788 struct ibmvnic_rx_buff *rx_buff; 1789 union sub_crq *next; 1790 u32 length; 1791 u16 offset; 1792 u8 flags = 0; 1793 1794 if (unlikely(adapter->resetting)) { 1795 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1796 napi_complete_done(napi, frames_processed); 1797 return frames_processed; 1798 } 1799 1800 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1801 break; 1802 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1803 rx_buff = 1804 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1805 rx_comp.correlator); 1806 /* do error checking */ 1807 if (next->rx_comp.rc) { 1808 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 1809 be16_to_cpu(next->rx_comp.rc)); 1810 /* free the entry */ 1811 next->rx_comp.first = 0; 1812 remove_buff_from_pool(adapter, rx_buff); 1813 continue; 1814 } 1815 1816 length = be32_to_cpu(next->rx_comp.len); 1817 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1818 flags = next->rx_comp.flags; 1819 skb = rx_buff->skb; 1820 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1821 length); 1822 1823 /* VLAN Header has been stripped by the system firmware and 1824 * needs to be inserted by the driver 1825 */ 1826 if (adapter->rx_vlan_header_insertion && 1827 (flags & IBMVNIC_VLAN_STRIPPED)) 1828 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1829 ntohs(next->rx_comp.vlan_tci)); 1830 1831 /* free the entry */ 1832 next->rx_comp.first = 0; 1833 remove_buff_from_pool(adapter, rx_buff); 1834 1835 skb_put(skb, length); 1836 skb->protocol = eth_type_trans(skb, netdev); 1837 skb_record_rx_queue(skb, scrq_num); 1838 1839 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1840 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1841 skb->ip_summed = CHECKSUM_UNNECESSARY; 1842 } 1843 1844 length = skb->len; 1845 napi_gro_receive(napi, skb); /* send it up */ 1846 netdev->stats.rx_packets++; 1847 netdev->stats.rx_bytes += length; 1848 adapter->rx_stats_buffers[scrq_num].packets++; 1849 adapter->rx_stats_buffers[scrq_num].bytes += length; 1850 frames_processed++; 1851 } 1852 1853 if (adapter->state != VNIC_CLOSING) 1854 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1855 1856 if (frames_processed < budget) { 1857 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1858 napi_complete_done(napi, frames_processed); 1859 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1860 napi_reschedule(napi)) { 1861 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1862 goto restart_poll; 1863 } 1864 } 1865 return frames_processed; 1866 } 1867 1868 #ifdef CONFIG_NET_POLL_CONTROLLER 1869 static void ibmvnic_netpoll_controller(struct net_device *dev) 1870 { 1871 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1872 int i; 1873 1874 replenish_pools(netdev_priv(dev)); 1875 for (i = 0; i < adapter->req_rx_queues; i++) 1876 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1877 adapter->rx_scrq[i]); 1878 } 1879 #endif 1880 1881 static int wait_for_reset(struct ibmvnic_adapter *adapter) 1882 { 1883 adapter->fallback.mtu = adapter->req_mtu; 1884 adapter->fallback.rx_queues = adapter->req_rx_queues; 1885 adapter->fallback.tx_queues = adapter->req_tx_queues; 1886 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 1887 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 1888 1889 init_completion(&adapter->reset_done); 1890 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 1891 adapter->wait_for_reset = true; 1892 wait_for_completion(&adapter->reset_done); 1893 1894 if (adapter->reset_done_rc) { 1895 adapter->desired.mtu = adapter->fallback.mtu; 1896 adapter->desired.rx_queues = adapter->fallback.rx_queues; 1897 adapter->desired.tx_queues = adapter->fallback.tx_queues; 1898 adapter->desired.rx_entries = adapter->fallback.rx_entries; 1899 adapter->desired.tx_entries = adapter->fallback.tx_entries; 1900 1901 init_completion(&adapter->reset_done); 1902 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 1903 wait_for_completion(&adapter->reset_done); 1904 } 1905 adapter->wait_for_reset = false; 1906 1907 return adapter->reset_done_rc; 1908 } 1909 1910 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 1911 { 1912 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1913 1914 adapter->desired.mtu = new_mtu + ETH_HLEN; 1915 1916 return wait_for_reset(adapter); 1917 } 1918 1919 static const struct net_device_ops ibmvnic_netdev_ops = { 1920 .ndo_open = ibmvnic_open, 1921 .ndo_stop = ibmvnic_close, 1922 .ndo_start_xmit = ibmvnic_xmit, 1923 .ndo_set_rx_mode = ibmvnic_set_multi, 1924 .ndo_set_mac_address = ibmvnic_set_mac, 1925 .ndo_validate_addr = eth_validate_addr, 1926 .ndo_tx_timeout = ibmvnic_tx_timeout, 1927 #ifdef CONFIG_NET_POLL_CONTROLLER 1928 .ndo_poll_controller = ibmvnic_netpoll_controller, 1929 #endif 1930 .ndo_change_mtu = ibmvnic_change_mtu, 1931 }; 1932 1933 /* ethtool functions */ 1934 1935 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1936 struct ethtool_link_ksettings *cmd) 1937 { 1938 u32 supported, advertising; 1939 1940 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1941 SUPPORTED_FIBRE); 1942 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1943 ADVERTISED_FIBRE); 1944 cmd->base.speed = SPEED_1000; 1945 cmd->base.duplex = DUPLEX_FULL; 1946 cmd->base.port = PORT_FIBRE; 1947 cmd->base.phy_address = 0; 1948 cmd->base.autoneg = AUTONEG_ENABLE; 1949 1950 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1951 supported); 1952 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1953 advertising); 1954 1955 return 0; 1956 } 1957 1958 static void ibmvnic_get_drvinfo(struct net_device *netdev, 1959 struct ethtool_drvinfo *info) 1960 { 1961 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1962 1963 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1964 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1965 strlcpy(info->fw_version, adapter->fw_version, 1966 sizeof(info->fw_version)); 1967 } 1968 1969 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1970 { 1971 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1972 1973 return adapter->msg_enable; 1974 } 1975 1976 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1977 { 1978 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1979 1980 adapter->msg_enable = data; 1981 } 1982 1983 static u32 ibmvnic_get_link(struct net_device *netdev) 1984 { 1985 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1986 1987 /* Don't need to send a query because we request a logical link up at 1988 * init and then we wait for link state indications 1989 */ 1990 return adapter->logical_link_state; 1991 } 1992 1993 static void ibmvnic_get_ringparam(struct net_device *netdev, 1994 struct ethtool_ringparam *ring) 1995 { 1996 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1997 1998 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 1999 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2000 ring->rx_mini_max_pending = 0; 2001 ring->rx_jumbo_max_pending = 0; 2002 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2003 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2004 ring->rx_mini_pending = 0; 2005 ring->rx_jumbo_pending = 0; 2006 } 2007 2008 static int ibmvnic_set_ringparam(struct net_device *netdev, 2009 struct ethtool_ringparam *ring) 2010 { 2011 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2012 2013 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2014 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2015 netdev_err(netdev, "Invalid request.\n"); 2016 netdev_err(netdev, "Max tx buffers = %llu\n", 2017 adapter->max_rx_add_entries_per_subcrq); 2018 netdev_err(netdev, "Max rx buffers = %llu\n", 2019 adapter->max_tx_entries_per_subcrq); 2020 return -EINVAL; 2021 } 2022 2023 adapter->desired.rx_entries = ring->rx_pending; 2024 adapter->desired.tx_entries = ring->tx_pending; 2025 2026 return wait_for_reset(adapter); 2027 } 2028 2029 static void ibmvnic_get_channels(struct net_device *netdev, 2030 struct ethtool_channels *channels) 2031 { 2032 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2033 2034 channels->max_rx = adapter->max_rx_queues; 2035 channels->max_tx = adapter->max_tx_queues; 2036 channels->max_other = 0; 2037 channels->max_combined = 0; 2038 channels->rx_count = adapter->req_rx_queues; 2039 channels->tx_count = adapter->req_tx_queues; 2040 channels->other_count = 0; 2041 channels->combined_count = 0; 2042 } 2043 2044 static int ibmvnic_set_channels(struct net_device *netdev, 2045 struct ethtool_channels *channels) 2046 { 2047 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2048 2049 adapter->desired.rx_queues = channels->rx_count; 2050 adapter->desired.tx_queues = channels->tx_count; 2051 2052 return wait_for_reset(adapter); 2053 } 2054 2055 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2056 { 2057 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2058 int i; 2059 2060 if (stringset != ETH_SS_STATS) 2061 return; 2062 2063 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2064 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2065 2066 for (i = 0; i < adapter->req_tx_queues; i++) { 2067 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2068 data += ETH_GSTRING_LEN; 2069 2070 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2071 data += ETH_GSTRING_LEN; 2072 2073 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2074 data += ETH_GSTRING_LEN; 2075 } 2076 2077 for (i = 0; i < adapter->req_rx_queues; i++) { 2078 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2079 data += ETH_GSTRING_LEN; 2080 2081 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2082 data += ETH_GSTRING_LEN; 2083 2084 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2085 data += ETH_GSTRING_LEN; 2086 } 2087 } 2088 2089 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2090 { 2091 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2092 2093 switch (sset) { 2094 case ETH_SS_STATS: 2095 return ARRAY_SIZE(ibmvnic_stats) + 2096 adapter->req_tx_queues * NUM_TX_STATS + 2097 adapter->req_rx_queues * NUM_RX_STATS; 2098 default: 2099 return -EOPNOTSUPP; 2100 } 2101 } 2102 2103 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2104 struct ethtool_stats *stats, u64 *data) 2105 { 2106 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2107 union ibmvnic_crq crq; 2108 int i, j; 2109 2110 memset(&crq, 0, sizeof(crq)); 2111 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2112 crq.request_statistics.cmd = REQUEST_STATISTICS; 2113 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2114 crq.request_statistics.len = 2115 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2116 2117 /* Wait for data to be written */ 2118 init_completion(&adapter->stats_done); 2119 ibmvnic_send_crq(adapter, &crq); 2120 wait_for_completion(&adapter->stats_done); 2121 2122 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2123 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2124 ibmvnic_stats[i].offset)); 2125 2126 for (j = 0; j < adapter->req_tx_queues; j++) { 2127 data[i] = adapter->tx_stats_buffers[j].packets; 2128 i++; 2129 data[i] = adapter->tx_stats_buffers[j].bytes; 2130 i++; 2131 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2132 i++; 2133 } 2134 2135 for (j = 0; j < adapter->req_rx_queues; j++) { 2136 data[i] = adapter->rx_stats_buffers[j].packets; 2137 i++; 2138 data[i] = adapter->rx_stats_buffers[j].bytes; 2139 i++; 2140 data[i] = adapter->rx_stats_buffers[j].interrupts; 2141 i++; 2142 } 2143 } 2144 2145 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2146 .get_drvinfo = ibmvnic_get_drvinfo, 2147 .get_msglevel = ibmvnic_get_msglevel, 2148 .set_msglevel = ibmvnic_set_msglevel, 2149 .get_link = ibmvnic_get_link, 2150 .get_ringparam = ibmvnic_get_ringparam, 2151 .set_ringparam = ibmvnic_set_ringparam, 2152 .get_channels = ibmvnic_get_channels, 2153 .set_channels = ibmvnic_set_channels, 2154 .get_strings = ibmvnic_get_strings, 2155 .get_sset_count = ibmvnic_get_sset_count, 2156 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2157 .get_link_ksettings = ibmvnic_get_link_ksettings, 2158 }; 2159 2160 /* Routines for managing CRQs/sCRQs */ 2161 2162 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2163 struct ibmvnic_sub_crq_queue *scrq) 2164 { 2165 int rc; 2166 2167 if (scrq->irq) { 2168 free_irq(scrq->irq, scrq); 2169 irq_dispose_mapping(scrq->irq); 2170 scrq->irq = 0; 2171 } 2172 2173 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2174 scrq->cur = 0; 2175 2176 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2177 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2178 return rc; 2179 } 2180 2181 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2182 { 2183 int i, rc; 2184 2185 for (i = 0; i < adapter->req_tx_queues; i++) { 2186 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2187 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2188 if (rc) 2189 return rc; 2190 } 2191 2192 for (i = 0; i < adapter->req_rx_queues; i++) { 2193 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2194 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2195 if (rc) 2196 return rc; 2197 } 2198 2199 return rc; 2200 } 2201 2202 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2203 struct ibmvnic_sub_crq_queue *scrq) 2204 { 2205 struct device *dev = &adapter->vdev->dev; 2206 long rc; 2207 2208 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2209 2210 /* Close the sub-crqs */ 2211 do { 2212 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2213 adapter->vdev->unit_address, 2214 scrq->crq_num); 2215 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2216 2217 if (rc) { 2218 netdev_err(adapter->netdev, 2219 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2220 scrq->crq_num, rc); 2221 } 2222 2223 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2224 DMA_BIDIRECTIONAL); 2225 free_pages((unsigned long)scrq->msgs, 2); 2226 kfree(scrq); 2227 } 2228 2229 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2230 *adapter) 2231 { 2232 struct device *dev = &adapter->vdev->dev; 2233 struct ibmvnic_sub_crq_queue *scrq; 2234 int rc; 2235 2236 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2237 if (!scrq) 2238 return NULL; 2239 2240 scrq->msgs = 2241 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2242 if (!scrq->msgs) { 2243 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2244 goto zero_page_failed; 2245 } 2246 2247 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2248 DMA_BIDIRECTIONAL); 2249 if (dma_mapping_error(dev, scrq->msg_token)) { 2250 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2251 goto map_failed; 2252 } 2253 2254 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2255 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2256 2257 if (rc == H_RESOURCE) 2258 rc = ibmvnic_reset_crq(adapter); 2259 2260 if (rc == H_CLOSED) { 2261 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2262 } else if (rc) { 2263 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2264 goto reg_failed; 2265 } 2266 2267 scrq->adapter = adapter; 2268 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2269 spin_lock_init(&scrq->lock); 2270 2271 netdev_dbg(adapter->netdev, 2272 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2273 scrq->crq_num, scrq->hw_irq, scrq->irq); 2274 2275 return scrq; 2276 2277 reg_failed: 2278 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2279 DMA_BIDIRECTIONAL); 2280 map_failed: 2281 free_pages((unsigned long)scrq->msgs, 2); 2282 zero_page_failed: 2283 kfree(scrq); 2284 2285 return NULL; 2286 } 2287 2288 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 2289 { 2290 int i; 2291 2292 if (adapter->tx_scrq) { 2293 for (i = 0; i < adapter->req_tx_queues; i++) { 2294 if (!adapter->tx_scrq[i]) 2295 continue; 2296 2297 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2298 i); 2299 if (adapter->tx_scrq[i]->irq) { 2300 free_irq(adapter->tx_scrq[i]->irq, 2301 adapter->tx_scrq[i]); 2302 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2303 adapter->tx_scrq[i]->irq = 0; 2304 } 2305 2306 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2307 } 2308 2309 kfree(adapter->tx_scrq); 2310 adapter->tx_scrq = NULL; 2311 } 2312 2313 if (adapter->rx_scrq) { 2314 for (i = 0; i < adapter->req_rx_queues; i++) { 2315 if (!adapter->rx_scrq[i]) 2316 continue; 2317 2318 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2319 i); 2320 if (adapter->rx_scrq[i]->irq) { 2321 free_irq(adapter->rx_scrq[i]->irq, 2322 adapter->rx_scrq[i]); 2323 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2324 adapter->rx_scrq[i]->irq = 0; 2325 } 2326 2327 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2328 } 2329 2330 kfree(adapter->rx_scrq); 2331 adapter->rx_scrq = NULL; 2332 } 2333 } 2334 2335 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2336 struct ibmvnic_sub_crq_queue *scrq) 2337 { 2338 struct device *dev = &adapter->vdev->dev; 2339 unsigned long rc; 2340 2341 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2342 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2343 if (rc) 2344 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2345 scrq->hw_irq, rc); 2346 return rc; 2347 } 2348 2349 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2350 struct ibmvnic_sub_crq_queue *scrq) 2351 { 2352 struct device *dev = &adapter->vdev->dev; 2353 unsigned long rc; 2354 2355 if (scrq->hw_irq > 0x100000000ULL) { 2356 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2357 return 1; 2358 } 2359 2360 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2361 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2362 if (rc) 2363 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2364 scrq->hw_irq, rc); 2365 return rc; 2366 } 2367 2368 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2369 struct ibmvnic_sub_crq_queue *scrq) 2370 { 2371 struct device *dev = &adapter->vdev->dev; 2372 struct ibmvnic_tx_buff *txbuff; 2373 union sub_crq *next; 2374 int index; 2375 int i, j; 2376 u8 first; 2377 2378 restart_loop: 2379 while (pending_scrq(adapter, scrq)) { 2380 unsigned int pool = scrq->pool_index; 2381 2382 next = ibmvnic_next_scrq(adapter, scrq); 2383 for (i = 0; i < next->tx_comp.num_comps; i++) { 2384 if (next->tx_comp.rcs[i]) { 2385 dev_err(dev, "tx error %x\n", 2386 next->tx_comp.rcs[i]); 2387 continue; 2388 } 2389 index = be32_to_cpu(next->tx_comp.correlators[i]); 2390 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 2391 2392 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2393 if (!txbuff->data_dma[j]) 2394 continue; 2395 2396 txbuff->data_dma[j] = 0; 2397 } 2398 /* if sub_crq was sent indirectly */ 2399 first = txbuff->indir_arr[0].generic.first; 2400 if (first == IBMVNIC_CRQ_CMD) { 2401 dma_unmap_single(dev, txbuff->indir_dma, 2402 sizeof(txbuff->indir_arr), 2403 DMA_TO_DEVICE); 2404 } 2405 2406 if (txbuff->last_frag) { 2407 dev_kfree_skb_any(txbuff->skb); 2408 txbuff->skb = NULL; 2409 } 2410 2411 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 2412 producer_index] = index; 2413 adapter->tx_pool[pool].producer_index = 2414 (adapter->tx_pool[pool].producer_index + 1) % 2415 adapter->req_tx_entries_per_subcrq; 2416 } 2417 /* remove tx_comp scrq*/ 2418 next->tx_comp.first = 0; 2419 2420 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 2421 (adapter->req_tx_entries_per_subcrq / 2) && 2422 __netif_subqueue_stopped(adapter->netdev, 2423 scrq->pool_index)) { 2424 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2425 netdev_info(adapter->netdev, "Started queue %d\n", 2426 scrq->pool_index); 2427 } 2428 } 2429 2430 enable_scrq_irq(adapter, scrq); 2431 2432 if (pending_scrq(adapter, scrq)) { 2433 disable_scrq_irq(adapter, scrq); 2434 goto restart_loop; 2435 } 2436 2437 return 0; 2438 } 2439 2440 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2441 { 2442 struct ibmvnic_sub_crq_queue *scrq = instance; 2443 struct ibmvnic_adapter *adapter = scrq->adapter; 2444 2445 disable_scrq_irq(adapter, scrq); 2446 ibmvnic_complete_tx(adapter, scrq); 2447 2448 return IRQ_HANDLED; 2449 } 2450 2451 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2452 { 2453 struct ibmvnic_sub_crq_queue *scrq = instance; 2454 struct ibmvnic_adapter *adapter = scrq->adapter; 2455 2456 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2457 2458 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2459 disable_scrq_irq(adapter, scrq); 2460 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2461 } 2462 2463 return IRQ_HANDLED; 2464 } 2465 2466 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2467 { 2468 struct device *dev = &adapter->vdev->dev; 2469 struct ibmvnic_sub_crq_queue *scrq; 2470 int i = 0, j = 0; 2471 int rc = 0; 2472 2473 for (i = 0; i < adapter->req_tx_queues; i++) { 2474 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2475 i); 2476 scrq = adapter->tx_scrq[i]; 2477 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2478 2479 if (!scrq->irq) { 2480 rc = -EINVAL; 2481 dev_err(dev, "Error mapping irq\n"); 2482 goto req_tx_irq_failed; 2483 } 2484 2485 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2486 0, "ibmvnic_tx", scrq); 2487 2488 if (rc) { 2489 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2490 scrq->irq, rc); 2491 irq_dispose_mapping(scrq->irq); 2492 goto req_rx_irq_failed; 2493 } 2494 } 2495 2496 for (i = 0; i < adapter->req_rx_queues; i++) { 2497 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2498 i); 2499 scrq = adapter->rx_scrq[i]; 2500 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2501 if (!scrq->irq) { 2502 rc = -EINVAL; 2503 dev_err(dev, "Error mapping irq\n"); 2504 goto req_rx_irq_failed; 2505 } 2506 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2507 0, "ibmvnic_rx", scrq); 2508 if (rc) { 2509 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2510 scrq->irq, rc); 2511 irq_dispose_mapping(scrq->irq); 2512 goto req_rx_irq_failed; 2513 } 2514 } 2515 return rc; 2516 2517 req_rx_irq_failed: 2518 for (j = 0; j < i; j++) { 2519 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2520 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2521 } 2522 i = adapter->req_tx_queues; 2523 req_tx_irq_failed: 2524 for (j = 0; j < i; j++) { 2525 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2526 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2527 } 2528 release_sub_crqs(adapter); 2529 return rc; 2530 } 2531 2532 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2533 { 2534 struct device *dev = &adapter->vdev->dev; 2535 struct ibmvnic_sub_crq_queue **allqueues; 2536 int registered_queues = 0; 2537 int total_queues; 2538 int more = 0; 2539 int i; 2540 2541 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2542 2543 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2544 if (!allqueues) 2545 return -1; 2546 2547 for (i = 0; i < total_queues; i++) { 2548 allqueues[i] = init_sub_crq_queue(adapter); 2549 if (!allqueues[i]) { 2550 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2551 break; 2552 } 2553 registered_queues++; 2554 } 2555 2556 /* Make sure we were able to register the minimum number of queues */ 2557 if (registered_queues < 2558 adapter->min_tx_queues + adapter->min_rx_queues) { 2559 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2560 goto tx_failed; 2561 } 2562 2563 /* Distribute the failed allocated queues*/ 2564 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2565 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2566 switch (i % 3) { 2567 case 0: 2568 if (adapter->req_rx_queues > adapter->min_rx_queues) 2569 adapter->req_rx_queues--; 2570 else 2571 more++; 2572 break; 2573 case 1: 2574 if (adapter->req_tx_queues > adapter->min_tx_queues) 2575 adapter->req_tx_queues--; 2576 else 2577 more++; 2578 break; 2579 } 2580 } 2581 2582 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2583 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2584 if (!adapter->tx_scrq) 2585 goto tx_failed; 2586 2587 for (i = 0; i < adapter->req_tx_queues; i++) { 2588 adapter->tx_scrq[i] = allqueues[i]; 2589 adapter->tx_scrq[i]->pool_index = i; 2590 } 2591 2592 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2593 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2594 if (!adapter->rx_scrq) 2595 goto rx_failed; 2596 2597 for (i = 0; i < adapter->req_rx_queues; i++) { 2598 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2599 adapter->rx_scrq[i]->scrq_num = i; 2600 } 2601 2602 kfree(allqueues); 2603 return 0; 2604 2605 rx_failed: 2606 kfree(adapter->tx_scrq); 2607 adapter->tx_scrq = NULL; 2608 tx_failed: 2609 for (i = 0; i < registered_queues; i++) 2610 release_sub_crq_queue(adapter, allqueues[i]); 2611 kfree(allqueues); 2612 return -1; 2613 } 2614 2615 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2616 { 2617 struct device *dev = &adapter->vdev->dev; 2618 union ibmvnic_crq crq; 2619 int max_entries; 2620 2621 if (!retry) { 2622 /* Sub-CRQ entries are 32 byte long */ 2623 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2624 2625 if (adapter->min_tx_entries_per_subcrq > entries_page || 2626 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2627 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2628 return; 2629 } 2630 2631 if (adapter->desired.mtu) 2632 adapter->req_mtu = adapter->desired.mtu; 2633 else 2634 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2635 2636 if (!adapter->desired.tx_entries) 2637 adapter->desired.tx_entries = 2638 adapter->max_tx_entries_per_subcrq; 2639 if (!adapter->desired.rx_entries) 2640 adapter->desired.rx_entries = 2641 adapter->max_rx_add_entries_per_subcrq; 2642 2643 max_entries = IBMVNIC_MAX_LTB_SIZE / 2644 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 2645 2646 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2647 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 2648 adapter->desired.tx_entries = max_entries; 2649 } 2650 2651 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2652 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 2653 adapter->desired.rx_entries = max_entries; 2654 } 2655 2656 if (adapter->desired.tx_entries) 2657 adapter->req_tx_entries_per_subcrq = 2658 adapter->desired.tx_entries; 2659 else 2660 adapter->req_tx_entries_per_subcrq = 2661 adapter->max_tx_entries_per_subcrq; 2662 2663 if (adapter->desired.rx_entries) 2664 adapter->req_rx_add_entries_per_subcrq = 2665 adapter->desired.rx_entries; 2666 else 2667 adapter->req_rx_add_entries_per_subcrq = 2668 adapter->max_rx_add_entries_per_subcrq; 2669 2670 if (adapter->desired.tx_queues) 2671 adapter->req_tx_queues = 2672 adapter->desired.tx_queues; 2673 else 2674 adapter->req_tx_queues = 2675 adapter->opt_tx_comp_sub_queues; 2676 2677 if (adapter->desired.rx_queues) 2678 adapter->req_rx_queues = 2679 adapter->desired.rx_queues; 2680 else 2681 adapter->req_rx_queues = 2682 adapter->opt_rx_comp_queues; 2683 2684 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2685 } 2686 2687 memset(&crq, 0, sizeof(crq)); 2688 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2689 crq.request_capability.cmd = REQUEST_CAPABILITY; 2690 2691 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2692 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2693 atomic_inc(&adapter->running_cap_crqs); 2694 ibmvnic_send_crq(adapter, &crq); 2695 2696 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2697 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2698 atomic_inc(&adapter->running_cap_crqs); 2699 ibmvnic_send_crq(adapter, &crq); 2700 2701 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2702 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2703 atomic_inc(&adapter->running_cap_crqs); 2704 ibmvnic_send_crq(adapter, &crq); 2705 2706 crq.request_capability.capability = 2707 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2708 crq.request_capability.number = 2709 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2710 atomic_inc(&adapter->running_cap_crqs); 2711 ibmvnic_send_crq(adapter, &crq); 2712 2713 crq.request_capability.capability = 2714 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2715 crq.request_capability.number = 2716 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2717 atomic_inc(&adapter->running_cap_crqs); 2718 ibmvnic_send_crq(adapter, &crq); 2719 2720 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2721 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2722 atomic_inc(&adapter->running_cap_crqs); 2723 ibmvnic_send_crq(adapter, &crq); 2724 2725 if (adapter->netdev->flags & IFF_PROMISC) { 2726 if (adapter->promisc_supported) { 2727 crq.request_capability.capability = 2728 cpu_to_be16(PROMISC_REQUESTED); 2729 crq.request_capability.number = cpu_to_be64(1); 2730 atomic_inc(&adapter->running_cap_crqs); 2731 ibmvnic_send_crq(adapter, &crq); 2732 } 2733 } else { 2734 crq.request_capability.capability = 2735 cpu_to_be16(PROMISC_REQUESTED); 2736 crq.request_capability.number = cpu_to_be64(0); 2737 atomic_inc(&adapter->running_cap_crqs); 2738 ibmvnic_send_crq(adapter, &crq); 2739 } 2740 } 2741 2742 static int pending_scrq(struct ibmvnic_adapter *adapter, 2743 struct ibmvnic_sub_crq_queue *scrq) 2744 { 2745 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2746 2747 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2748 return 1; 2749 else 2750 return 0; 2751 } 2752 2753 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2754 struct ibmvnic_sub_crq_queue *scrq) 2755 { 2756 union sub_crq *entry; 2757 unsigned long flags; 2758 2759 spin_lock_irqsave(&scrq->lock, flags); 2760 entry = &scrq->msgs[scrq->cur]; 2761 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2762 if (++scrq->cur == scrq->size) 2763 scrq->cur = 0; 2764 } else { 2765 entry = NULL; 2766 } 2767 spin_unlock_irqrestore(&scrq->lock, flags); 2768 2769 return entry; 2770 } 2771 2772 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2773 { 2774 struct ibmvnic_crq_queue *queue = &adapter->crq; 2775 union ibmvnic_crq *crq; 2776 2777 crq = &queue->msgs[queue->cur]; 2778 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2779 if (++queue->cur == queue->size) 2780 queue->cur = 0; 2781 } else { 2782 crq = NULL; 2783 } 2784 2785 return crq; 2786 } 2787 2788 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2789 union sub_crq *sub_crq) 2790 { 2791 unsigned int ua = adapter->vdev->unit_address; 2792 struct device *dev = &adapter->vdev->dev; 2793 u64 *u64_crq = (u64 *)sub_crq; 2794 int rc; 2795 2796 netdev_dbg(adapter->netdev, 2797 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2798 (unsigned long int)cpu_to_be64(remote_handle), 2799 (unsigned long int)cpu_to_be64(u64_crq[0]), 2800 (unsigned long int)cpu_to_be64(u64_crq[1]), 2801 (unsigned long int)cpu_to_be64(u64_crq[2]), 2802 (unsigned long int)cpu_to_be64(u64_crq[3])); 2803 2804 /* Make sure the hypervisor sees the complete request */ 2805 mb(); 2806 2807 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2808 cpu_to_be64(remote_handle), 2809 cpu_to_be64(u64_crq[0]), 2810 cpu_to_be64(u64_crq[1]), 2811 cpu_to_be64(u64_crq[2]), 2812 cpu_to_be64(u64_crq[3])); 2813 2814 if (rc) { 2815 if (rc == H_CLOSED) 2816 dev_warn(dev, "CRQ Queue closed\n"); 2817 dev_err(dev, "Send error (rc=%d)\n", rc); 2818 } 2819 2820 return rc; 2821 } 2822 2823 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2824 u64 remote_handle, u64 ioba, u64 num_entries) 2825 { 2826 unsigned int ua = adapter->vdev->unit_address; 2827 struct device *dev = &adapter->vdev->dev; 2828 int rc; 2829 2830 /* Make sure the hypervisor sees the complete request */ 2831 mb(); 2832 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2833 cpu_to_be64(remote_handle), 2834 ioba, num_entries); 2835 2836 if (rc) { 2837 if (rc == H_CLOSED) 2838 dev_warn(dev, "CRQ Queue closed\n"); 2839 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2840 } 2841 2842 return rc; 2843 } 2844 2845 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2846 union ibmvnic_crq *crq) 2847 { 2848 unsigned int ua = adapter->vdev->unit_address; 2849 struct device *dev = &adapter->vdev->dev; 2850 u64 *u64_crq = (u64 *)crq; 2851 int rc; 2852 2853 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2854 (unsigned long int)cpu_to_be64(u64_crq[0]), 2855 (unsigned long int)cpu_to_be64(u64_crq[1])); 2856 2857 /* Make sure the hypervisor sees the complete request */ 2858 mb(); 2859 2860 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2861 cpu_to_be64(u64_crq[0]), 2862 cpu_to_be64(u64_crq[1])); 2863 2864 if (rc) { 2865 if (rc == H_CLOSED) 2866 dev_warn(dev, "CRQ Queue closed\n"); 2867 dev_warn(dev, "Send error (rc=%d)\n", rc); 2868 } 2869 2870 return rc; 2871 } 2872 2873 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2874 { 2875 union ibmvnic_crq crq; 2876 2877 memset(&crq, 0, sizeof(crq)); 2878 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2879 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2880 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2881 2882 return ibmvnic_send_crq(adapter, &crq); 2883 } 2884 2885 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2886 { 2887 union ibmvnic_crq crq; 2888 2889 memset(&crq, 0, sizeof(crq)); 2890 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2891 crq.version_exchange.cmd = VERSION_EXCHANGE; 2892 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2893 2894 return ibmvnic_send_crq(adapter, &crq); 2895 } 2896 2897 struct vnic_login_client_data { 2898 u8 type; 2899 __be16 len; 2900 char name; 2901 } __packed; 2902 2903 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 2904 { 2905 int len; 2906 2907 /* Calculate the amount of buffer space needed for the 2908 * vnic client data in the login buffer. There are four entries, 2909 * OS name, LPAR name, device name, and a null last entry. 2910 */ 2911 len = 4 * sizeof(struct vnic_login_client_data); 2912 len += 6; /* "Linux" plus NULL */ 2913 len += strlen(utsname()->nodename) + 1; 2914 len += strlen(adapter->netdev->name) + 1; 2915 2916 return len; 2917 } 2918 2919 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 2920 struct vnic_login_client_data *vlcd) 2921 { 2922 const char *os_name = "Linux"; 2923 int len; 2924 2925 /* Type 1 - LPAR OS */ 2926 vlcd->type = 1; 2927 len = strlen(os_name) + 1; 2928 vlcd->len = cpu_to_be16(len); 2929 strncpy(&vlcd->name, os_name, len); 2930 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 2931 2932 /* Type 2 - LPAR name */ 2933 vlcd->type = 2; 2934 len = strlen(utsname()->nodename) + 1; 2935 vlcd->len = cpu_to_be16(len); 2936 strncpy(&vlcd->name, utsname()->nodename, len); 2937 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 2938 2939 /* Type 3 - device name */ 2940 vlcd->type = 3; 2941 len = strlen(adapter->netdev->name) + 1; 2942 vlcd->len = cpu_to_be16(len); 2943 strncpy(&vlcd->name, adapter->netdev->name, len); 2944 } 2945 2946 static void send_login(struct ibmvnic_adapter *adapter) 2947 { 2948 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2949 struct ibmvnic_login_buffer *login_buffer; 2950 struct device *dev = &adapter->vdev->dev; 2951 dma_addr_t rsp_buffer_token; 2952 dma_addr_t buffer_token; 2953 size_t rsp_buffer_size; 2954 union ibmvnic_crq crq; 2955 size_t buffer_size; 2956 __be64 *tx_list_p; 2957 __be64 *rx_list_p; 2958 int client_data_len; 2959 struct vnic_login_client_data *vlcd; 2960 int i; 2961 2962 client_data_len = vnic_client_data_len(adapter); 2963 2964 buffer_size = 2965 sizeof(struct ibmvnic_login_buffer) + 2966 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 2967 client_data_len; 2968 2969 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 2970 if (!login_buffer) 2971 goto buf_alloc_failed; 2972 2973 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2974 DMA_TO_DEVICE); 2975 if (dma_mapping_error(dev, buffer_token)) { 2976 dev_err(dev, "Couldn't map login buffer\n"); 2977 goto buf_map_failed; 2978 } 2979 2980 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2981 sizeof(u64) * adapter->req_tx_queues + 2982 sizeof(u64) * adapter->req_rx_queues + 2983 sizeof(u64) * adapter->req_rx_queues + 2984 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2985 2986 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2987 if (!login_rsp_buffer) 2988 goto buf_rsp_alloc_failed; 2989 2990 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2991 rsp_buffer_size, DMA_FROM_DEVICE); 2992 if (dma_mapping_error(dev, rsp_buffer_token)) { 2993 dev_err(dev, "Couldn't map login rsp buffer\n"); 2994 goto buf_rsp_map_failed; 2995 } 2996 2997 adapter->login_buf = login_buffer; 2998 adapter->login_buf_token = buffer_token; 2999 adapter->login_buf_sz = buffer_size; 3000 adapter->login_rsp_buf = login_rsp_buffer; 3001 adapter->login_rsp_buf_token = rsp_buffer_token; 3002 adapter->login_rsp_buf_sz = rsp_buffer_size; 3003 3004 login_buffer->len = cpu_to_be32(buffer_size); 3005 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3006 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3007 login_buffer->off_txcomp_subcrqs = 3008 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3009 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3010 login_buffer->off_rxcomp_subcrqs = 3011 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3012 sizeof(u64) * adapter->req_tx_queues); 3013 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3014 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3015 3016 tx_list_p = (__be64 *)((char *)login_buffer + 3017 sizeof(struct ibmvnic_login_buffer)); 3018 rx_list_p = (__be64 *)((char *)login_buffer + 3019 sizeof(struct ibmvnic_login_buffer) + 3020 sizeof(u64) * adapter->req_tx_queues); 3021 3022 for (i = 0; i < adapter->req_tx_queues; i++) { 3023 if (adapter->tx_scrq[i]) { 3024 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3025 crq_num); 3026 } 3027 } 3028 3029 for (i = 0; i < adapter->req_rx_queues; i++) { 3030 if (adapter->rx_scrq[i]) { 3031 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3032 crq_num); 3033 } 3034 } 3035 3036 /* Insert vNIC login client data */ 3037 vlcd = (struct vnic_login_client_data *) 3038 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3039 login_buffer->client_data_offset = 3040 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3041 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3042 3043 vnic_add_client_data(adapter, vlcd); 3044 3045 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3046 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3047 netdev_dbg(adapter->netdev, "%016lx\n", 3048 ((unsigned long int *)(adapter->login_buf))[i]); 3049 } 3050 3051 memset(&crq, 0, sizeof(crq)); 3052 crq.login.first = IBMVNIC_CRQ_CMD; 3053 crq.login.cmd = LOGIN; 3054 crq.login.ioba = cpu_to_be32(buffer_token); 3055 crq.login.len = cpu_to_be32(buffer_size); 3056 ibmvnic_send_crq(adapter, &crq); 3057 3058 return; 3059 3060 buf_rsp_map_failed: 3061 kfree(login_rsp_buffer); 3062 buf_rsp_alloc_failed: 3063 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3064 buf_map_failed: 3065 kfree(login_buffer); 3066 buf_alloc_failed: 3067 return; 3068 } 3069 3070 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3071 u32 len, u8 map_id) 3072 { 3073 union ibmvnic_crq crq; 3074 3075 memset(&crq, 0, sizeof(crq)); 3076 crq.request_map.first = IBMVNIC_CRQ_CMD; 3077 crq.request_map.cmd = REQUEST_MAP; 3078 crq.request_map.map_id = map_id; 3079 crq.request_map.ioba = cpu_to_be32(addr); 3080 crq.request_map.len = cpu_to_be32(len); 3081 ibmvnic_send_crq(adapter, &crq); 3082 } 3083 3084 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3085 { 3086 union ibmvnic_crq crq; 3087 3088 memset(&crq, 0, sizeof(crq)); 3089 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3090 crq.request_unmap.cmd = REQUEST_UNMAP; 3091 crq.request_unmap.map_id = map_id; 3092 ibmvnic_send_crq(adapter, &crq); 3093 } 3094 3095 static void send_map_query(struct ibmvnic_adapter *adapter) 3096 { 3097 union ibmvnic_crq crq; 3098 3099 memset(&crq, 0, sizeof(crq)); 3100 crq.query_map.first = IBMVNIC_CRQ_CMD; 3101 crq.query_map.cmd = QUERY_MAP; 3102 ibmvnic_send_crq(adapter, &crq); 3103 } 3104 3105 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3106 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3107 { 3108 union ibmvnic_crq crq; 3109 3110 atomic_set(&adapter->running_cap_crqs, 0); 3111 memset(&crq, 0, sizeof(crq)); 3112 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3113 crq.query_capability.cmd = QUERY_CAPABILITY; 3114 3115 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3116 atomic_inc(&adapter->running_cap_crqs); 3117 ibmvnic_send_crq(adapter, &crq); 3118 3119 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3120 atomic_inc(&adapter->running_cap_crqs); 3121 ibmvnic_send_crq(adapter, &crq); 3122 3123 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3124 atomic_inc(&adapter->running_cap_crqs); 3125 ibmvnic_send_crq(adapter, &crq); 3126 3127 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3128 atomic_inc(&adapter->running_cap_crqs); 3129 ibmvnic_send_crq(adapter, &crq); 3130 3131 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3132 atomic_inc(&adapter->running_cap_crqs); 3133 ibmvnic_send_crq(adapter, &crq); 3134 3135 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3136 atomic_inc(&adapter->running_cap_crqs); 3137 ibmvnic_send_crq(adapter, &crq); 3138 3139 crq.query_capability.capability = 3140 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3141 atomic_inc(&adapter->running_cap_crqs); 3142 ibmvnic_send_crq(adapter, &crq); 3143 3144 crq.query_capability.capability = 3145 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3146 atomic_inc(&adapter->running_cap_crqs); 3147 ibmvnic_send_crq(adapter, &crq); 3148 3149 crq.query_capability.capability = 3150 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3151 atomic_inc(&adapter->running_cap_crqs); 3152 ibmvnic_send_crq(adapter, &crq); 3153 3154 crq.query_capability.capability = 3155 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3156 atomic_inc(&adapter->running_cap_crqs); 3157 ibmvnic_send_crq(adapter, &crq); 3158 3159 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3160 atomic_inc(&adapter->running_cap_crqs); 3161 ibmvnic_send_crq(adapter, &crq); 3162 3163 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3164 atomic_inc(&adapter->running_cap_crqs); 3165 ibmvnic_send_crq(adapter, &crq); 3166 3167 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3168 atomic_inc(&adapter->running_cap_crqs); 3169 ibmvnic_send_crq(adapter, &crq); 3170 3171 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3172 atomic_inc(&adapter->running_cap_crqs); 3173 ibmvnic_send_crq(adapter, &crq); 3174 3175 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3176 atomic_inc(&adapter->running_cap_crqs); 3177 ibmvnic_send_crq(adapter, &crq); 3178 3179 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3180 atomic_inc(&adapter->running_cap_crqs); 3181 ibmvnic_send_crq(adapter, &crq); 3182 3183 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3184 atomic_inc(&adapter->running_cap_crqs); 3185 ibmvnic_send_crq(adapter, &crq); 3186 3187 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3188 atomic_inc(&adapter->running_cap_crqs); 3189 ibmvnic_send_crq(adapter, &crq); 3190 3191 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3192 atomic_inc(&adapter->running_cap_crqs); 3193 ibmvnic_send_crq(adapter, &crq); 3194 3195 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3196 atomic_inc(&adapter->running_cap_crqs); 3197 ibmvnic_send_crq(adapter, &crq); 3198 3199 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3200 atomic_inc(&adapter->running_cap_crqs); 3201 ibmvnic_send_crq(adapter, &crq); 3202 3203 crq.query_capability.capability = 3204 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3205 atomic_inc(&adapter->running_cap_crqs); 3206 ibmvnic_send_crq(adapter, &crq); 3207 3208 crq.query_capability.capability = 3209 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3210 atomic_inc(&adapter->running_cap_crqs); 3211 ibmvnic_send_crq(adapter, &crq); 3212 3213 crq.query_capability.capability = 3214 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3215 atomic_inc(&adapter->running_cap_crqs); 3216 ibmvnic_send_crq(adapter, &crq); 3217 3218 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3219 atomic_inc(&adapter->running_cap_crqs); 3220 ibmvnic_send_crq(adapter, &crq); 3221 } 3222 3223 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3224 struct ibmvnic_adapter *adapter) 3225 { 3226 struct device *dev = &adapter->vdev->dev; 3227 3228 if (crq->get_vpd_size_rsp.rc.code) { 3229 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3230 crq->get_vpd_size_rsp.rc.code); 3231 complete(&adapter->fw_done); 3232 return; 3233 } 3234 3235 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3236 complete(&adapter->fw_done); 3237 } 3238 3239 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3240 struct ibmvnic_adapter *adapter) 3241 { 3242 struct device *dev = &adapter->vdev->dev; 3243 unsigned char *substr = NULL, *ptr = NULL; 3244 u8 fw_level_len = 0; 3245 3246 memset(adapter->fw_version, 0, 32); 3247 3248 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3249 DMA_FROM_DEVICE); 3250 3251 if (crq->get_vpd_rsp.rc.code) { 3252 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3253 crq->get_vpd_rsp.rc.code); 3254 goto complete; 3255 } 3256 3257 /* get the position of the firmware version info 3258 * located after the ASCII 'RM' substring in the buffer 3259 */ 3260 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3261 if (!substr) { 3262 dev_info(dev, "No FW level provided by VPD\n"); 3263 goto complete; 3264 } 3265 3266 /* get length of firmware level ASCII substring */ 3267 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3268 fw_level_len = *(substr + 2); 3269 } else { 3270 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3271 goto complete; 3272 } 3273 3274 /* copy firmware version string from vpd into adapter */ 3275 if ((substr + 3 + fw_level_len) < 3276 (adapter->vpd->buff + adapter->vpd->len)) { 3277 ptr = strncpy((char *)adapter->fw_version, 3278 substr + 3, fw_level_len); 3279 3280 if (!ptr) 3281 dev_err(dev, "Failed to isolate FW level string\n"); 3282 } else { 3283 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3284 } 3285 3286 complete: 3287 complete(&adapter->fw_done); 3288 } 3289 3290 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3291 { 3292 struct device *dev = &adapter->vdev->dev; 3293 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3294 union ibmvnic_crq crq; 3295 int i; 3296 3297 dma_unmap_single(dev, adapter->ip_offload_tok, 3298 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3299 3300 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3301 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3302 netdev_dbg(adapter->netdev, "%016lx\n", 3303 ((unsigned long int *)(buf))[i]); 3304 3305 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3306 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3307 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3308 buf->tcp_ipv4_chksum); 3309 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3310 buf->tcp_ipv6_chksum); 3311 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3312 buf->udp_ipv4_chksum); 3313 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3314 buf->udp_ipv6_chksum); 3315 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3316 buf->large_tx_ipv4); 3317 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3318 buf->large_tx_ipv6); 3319 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3320 buf->large_rx_ipv4); 3321 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3322 buf->large_rx_ipv6); 3323 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3324 buf->max_ipv4_header_size); 3325 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3326 buf->max_ipv6_header_size); 3327 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3328 buf->max_tcp_header_size); 3329 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3330 buf->max_udp_header_size); 3331 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3332 buf->max_large_tx_size); 3333 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3334 buf->max_large_rx_size); 3335 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3336 buf->ipv6_extension_header); 3337 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3338 buf->tcp_pseudosum_req); 3339 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3340 buf->num_ipv6_ext_headers); 3341 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3342 buf->off_ipv6_ext_headers); 3343 3344 adapter->ip_offload_ctrl_tok = 3345 dma_map_single(dev, &adapter->ip_offload_ctrl, 3346 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3347 3348 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3349 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3350 return; 3351 } 3352 3353 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3354 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3355 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3356 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3357 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3358 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3359 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3360 3361 /* large_rx disabled for now, additional features needed */ 3362 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3363 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3364 3365 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3366 3367 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3368 adapter->netdev->features |= NETIF_F_IP_CSUM; 3369 3370 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3371 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3372 3373 if ((adapter->netdev->features & 3374 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3375 adapter->netdev->features |= NETIF_F_RXCSUM; 3376 3377 if (buf->large_tx_ipv4) 3378 adapter->netdev->features |= NETIF_F_TSO; 3379 if (buf->large_tx_ipv6) 3380 adapter->netdev->features |= NETIF_F_TSO6; 3381 3382 adapter->netdev->hw_features |= adapter->netdev->features; 3383 3384 memset(&crq, 0, sizeof(crq)); 3385 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3386 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3387 crq.control_ip_offload.len = 3388 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3389 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3390 ibmvnic_send_crq(adapter, &crq); 3391 } 3392 3393 static void handle_error_info_rsp(union ibmvnic_crq *crq, 3394 struct ibmvnic_adapter *adapter) 3395 { 3396 struct device *dev = &adapter->vdev->dev; 3397 struct ibmvnic_error_buff *error_buff, *tmp; 3398 unsigned long flags; 3399 bool found = false; 3400 int i; 3401 3402 if (!crq->request_error_rsp.rc.code) { 3403 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 3404 crq->request_error_rsp.rc.code); 3405 return; 3406 } 3407 3408 spin_lock_irqsave(&adapter->error_list_lock, flags); 3409 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 3410 if (error_buff->error_id == crq->request_error_rsp.error_id) { 3411 found = true; 3412 list_del(&error_buff->list); 3413 break; 3414 } 3415 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3416 3417 if (!found) { 3418 dev_err(dev, "Couldn't find error id %x\n", 3419 be32_to_cpu(crq->request_error_rsp.error_id)); 3420 return; 3421 } 3422 3423 dev_err(dev, "Detailed info for error id %x:", 3424 be32_to_cpu(crq->request_error_rsp.error_id)); 3425 3426 for (i = 0; i < error_buff->len; i++) { 3427 pr_cont("%02x", (int)error_buff->buff[i]); 3428 if (i % 8 == 7) 3429 pr_cont(" "); 3430 } 3431 pr_cont("\n"); 3432 3433 dma_unmap_single(dev, error_buff->dma, error_buff->len, 3434 DMA_FROM_DEVICE); 3435 kfree(error_buff->buff); 3436 kfree(error_buff); 3437 } 3438 3439 static void request_error_information(struct ibmvnic_adapter *adapter, 3440 union ibmvnic_crq *err_crq) 3441 { 3442 struct device *dev = &adapter->vdev->dev; 3443 struct net_device *netdev = adapter->netdev; 3444 struct ibmvnic_error_buff *error_buff; 3445 unsigned long timeout = msecs_to_jiffies(30000); 3446 union ibmvnic_crq crq; 3447 unsigned long flags; 3448 int rc, detail_len; 3449 3450 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 3451 if (!error_buff) 3452 return; 3453 3454 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 3455 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 3456 if (!error_buff->buff) { 3457 kfree(error_buff); 3458 return; 3459 } 3460 3461 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 3462 DMA_FROM_DEVICE); 3463 if (dma_mapping_error(dev, error_buff->dma)) { 3464 netdev_err(netdev, "Couldn't map error buffer\n"); 3465 kfree(error_buff->buff); 3466 kfree(error_buff); 3467 return; 3468 } 3469 3470 error_buff->len = detail_len; 3471 error_buff->error_id = err_crq->error_indication.error_id; 3472 3473 spin_lock_irqsave(&adapter->error_list_lock, flags); 3474 list_add_tail(&error_buff->list, &adapter->errors); 3475 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3476 3477 memset(&crq, 0, sizeof(crq)); 3478 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 3479 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 3480 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 3481 crq.request_error_info.len = cpu_to_be32(detail_len); 3482 crq.request_error_info.error_id = err_crq->error_indication.error_id; 3483 3484 rc = ibmvnic_send_crq(adapter, &crq); 3485 if (rc) { 3486 netdev_err(netdev, "failed to request error information\n"); 3487 goto err_info_fail; 3488 } 3489 3490 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3491 netdev_err(netdev, "timeout waiting for error information\n"); 3492 goto err_info_fail; 3493 } 3494 3495 return; 3496 3497 err_info_fail: 3498 spin_lock_irqsave(&adapter->error_list_lock, flags); 3499 list_del(&error_buff->list); 3500 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3501 3502 kfree(error_buff->buff); 3503 kfree(error_buff); 3504 } 3505 3506 static void handle_error_indication(union ibmvnic_crq *crq, 3507 struct ibmvnic_adapter *adapter) 3508 { 3509 struct device *dev = &adapter->vdev->dev; 3510 3511 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 3512 crq->error_indication.flags 3513 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3514 be32_to_cpu(crq->error_indication.error_id), 3515 be16_to_cpu(crq->error_indication.error_cause)); 3516 3517 if (be32_to_cpu(crq->error_indication.error_id)) 3518 request_error_information(adapter, crq); 3519 3520 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3521 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3522 else 3523 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3524 } 3525 3526 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 3527 struct ibmvnic_adapter *adapter) 3528 { 3529 struct net_device *netdev = adapter->netdev; 3530 struct device *dev = &adapter->vdev->dev; 3531 long rc; 3532 3533 rc = crq->change_mac_addr_rsp.rc.code; 3534 if (rc) { 3535 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3536 return; 3537 } 3538 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3539 ETH_ALEN); 3540 } 3541 3542 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3543 struct ibmvnic_adapter *adapter) 3544 { 3545 struct device *dev = &adapter->vdev->dev; 3546 u64 *req_value; 3547 char *name; 3548 3549 atomic_dec(&adapter->running_cap_crqs); 3550 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3551 case REQ_TX_QUEUES: 3552 req_value = &adapter->req_tx_queues; 3553 name = "tx"; 3554 break; 3555 case REQ_RX_QUEUES: 3556 req_value = &adapter->req_rx_queues; 3557 name = "rx"; 3558 break; 3559 case REQ_RX_ADD_QUEUES: 3560 req_value = &adapter->req_rx_add_queues; 3561 name = "rx_add"; 3562 break; 3563 case REQ_TX_ENTRIES_PER_SUBCRQ: 3564 req_value = &adapter->req_tx_entries_per_subcrq; 3565 name = "tx_entries_per_subcrq"; 3566 break; 3567 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3568 req_value = &adapter->req_rx_add_entries_per_subcrq; 3569 name = "rx_add_entries_per_subcrq"; 3570 break; 3571 case REQ_MTU: 3572 req_value = &adapter->req_mtu; 3573 name = "mtu"; 3574 break; 3575 case PROMISC_REQUESTED: 3576 req_value = &adapter->promisc; 3577 name = "promisc"; 3578 break; 3579 default: 3580 dev_err(dev, "Got invalid cap request rsp %d\n", 3581 crq->request_capability.capability); 3582 return; 3583 } 3584 3585 switch (crq->request_capability_rsp.rc.code) { 3586 case SUCCESS: 3587 break; 3588 case PARTIALSUCCESS: 3589 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3590 *req_value, 3591 (long int)be64_to_cpu(crq->request_capability_rsp. 3592 number), name); 3593 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 3594 ibmvnic_send_req_caps(adapter, 1); 3595 return; 3596 default: 3597 dev_err(dev, "Error %d in request cap rsp\n", 3598 crq->request_capability_rsp.rc.code); 3599 return; 3600 } 3601 3602 /* Done receiving requested capabilities, query IP offload support */ 3603 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3604 union ibmvnic_crq newcrq; 3605 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3606 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3607 &adapter->ip_offload_buf; 3608 3609 adapter->wait_capability = false; 3610 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3611 buf_sz, 3612 DMA_FROM_DEVICE); 3613 3614 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3615 if (!firmware_has_feature(FW_FEATURE_CMO)) 3616 dev_err(dev, "Couldn't map offload buffer\n"); 3617 return; 3618 } 3619 3620 memset(&newcrq, 0, sizeof(newcrq)); 3621 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3622 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3623 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3624 newcrq.query_ip_offload.ioba = 3625 cpu_to_be32(adapter->ip_offload_tok); 3626 3627 ibmvnic_send_crq(adapter, &newcrq); 3628 } 3629 } 3630 3631 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3632 struct ibmvnic_adapter *adapter) 3633 { 3634 struct device *dev = &adapter->vdev->dev; 3635 struct net_device *netdev = adapter->netdev; 3636 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3637 struct ibmvnic_login_buffer *login = adapter->login_buf; 3638 int i; 3639 3640 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3641 DMA_BIDIRECTIONAL); 3642 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3643 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3644 3645 /* If the number of queues requested can't be allocated by the 3646 * server, the login response will return with code 1. We will need 3647 * to resend the login buffer with fewer queues requested. 3648 */ 3649 if (login_rsp_crq->generic.rc.code) { 3650 adapter->renegotiate = true; 3651 complete(&adapter->init_done); 3652 return 0; 3653 } 3654 3655 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3656 3657 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3658 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3659 netdev_dbg(adapter->netdev, "%016lx\n", 3660 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3661 } 3662 3663 /* Sanity checks */ 3664 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3665 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3666 adapter->req_rx_add_queues != 3667 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3668 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3669 ibmvnic_remove(adapter->vdev); 3670 return -EIO; 3671 } 3672 complete(&adapter->init_done); 3673 3674 return 0; 3675 } 3676 3677 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3678 struct ibmvnic_adapter *adapter) 3679 { 3680 struct device *dev = &adapter->vdev->dev; 3681 long rc; 3682 3683 rc = crq->request_unmap_rsp.rc.code; 3684 if (rc) 3685 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3686 } 3687 3688 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3689 struct ibmvnic_adapter *adapter) 3690 { 3691 struct net_device *netdev = adapter->netdev; 3692 struct device *dev = &adapter->vdev->dev; 3693 long rc; 3694 3695 rc = crq->query_map_rsp.rc.code; 3696 if (rc) { 3697 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3698 return; 3699 } 3700 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3701 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3702 crq->query_map_rsp.free_pages); 3703 } 3704 3705 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3706 struct ibmvnic_adapter *adapter) 3707 { 3708 struct net_device *netdev = adapter->netdev; 3709 struct device *dev = &adapter->vdev->dev; 3710 long rc; 3711 3712 atomic_dec(&adapter->running_cap_crqs); 3713 netdev_dbg(netdev, "Outstanding queries: %d\n", 3714 atomic_read(&adapter->running_cap_crqs)); 3715 rc = crq->query_capability.rc.code; 3716 if (rc) { 3717 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3718 goto out; 3719 } 3720 3721 switch (be16_to_cpu(crq->query_capability.capability)) { 3722 case MIN_TX_QUEUES: 3723 adapter->min_tx_queues = 3724 be64_to_cpu(crq->query_capability.number); 3725 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3726 adapter->min_tx_queues); 3727 break; 3728 case MIN_RX_QUEUES: 3729 adapter->min_rx_queues = 3730 be64_to_cpu(crq->query_capability.number); 3731 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3732 adapter->min_rx_queues); 3733 break; 3734 case MIN_RX_ADD_QUEUES: 3735 adapter->min_rx_add_queues = 3736 be64_to_cpu(crq->query_capability.number); 3737 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3738 adapter->min_rx_add_queues); 3739 break; 3740 case MAX_TX_QUEUES: 3741 adapter->max_tx_queues = 3742 be64_to_cpu(crq->query_capability.number); 3743 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3744 adapter->max_tx_queues); 3745 break; 3746 case MAX_RX_QUEUES: 3747 adapter->max_rx_queues = 3748 be64_to_cpu(crq->query_capability.number); 3749 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3750 adapter->max_rx_queues); 3751 break; 3752 case MAX_RX_ADD_QUEUES: 3753 adapter->max_rx_add_queues = 3754 be64_to_cpu(crq->query_capability.number); 3755 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3756 adapter->max_rx_add_queues); 3757 break; 3758 case MIN_TX_ENTRIES_PER_SUBCRQ: 3759 adapter->min_tx_entries_per_subcrq = 3760 be64_to_cpu(crq->query_capability.number); 3761 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3762 adapter->min_tx_entries_per_subcrq); 3763 break; 3764 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3765 adapter->min_rx_add_entries_per_subcrq = 3766 be64_to_cpu(crq->query_capability.number); 3767 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3768 adapter->min_rx_add_entries_per_subcrq); 3769 break; 3770 case MAX_TX_ENTRIES_PER_SUBCRQ: 3771 adapter->max_tx_entries_per_subcrq = 3772 be64_to_cpu(crq->query_capability.number); 3773 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3774 adapter->max_tx_entries_per_subcrq); 3775 break; 3776 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3777 adapter->max_rx_add_entries_per_subcrq = 3778 be64_to_cpu(crq->query_capability.number); 3779 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3780 adapter->max_rx_add_entries_per_subcrq); 3781 break; 3782 case TCP_IP_OFFLOAD: 3783 adapter->tcp_ip_offload = 3784 be64_to_cpu(crq->query_capability.number); 3785 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3786 adapter->tcp_ip_offload); 3787 break; 3788 case PROMISC_SUPPORTED: 3789 adapter->promisc_supported = 3790 be64_to_cpu(crq->query_capability.number); 3791 netdev_dbg(netdev, "promisc_supported = %lld\n", 3792 adapter->promisc_supported); 3793 break; 3794 case MIN_MTU: 3795 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3796 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3797 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3798 break; 3799 case MAX_MTU: 3800 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3801 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3802 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3803 break; 3804 case MAX_MULTICAST_FILTERS: 3805 adapter->max_multicast_filters = 3806 be64_to_cpu(crq->query_capability.number); 3807 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3808 adapter->max_multicast_filters); 3809 break; 3810 case VLAN_HEADER_INSERTION: 3811 adapter->vlan_header_insertion = 3812 be64_to_cpu(crq->query_capability.number); 3813 if (adapter->vlan_header_insertion) 3814 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3815 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3816 adapter->vlan_header_insertion); 3817 break; 3818 case RX_VLAN_HEADER_INSERTION: 3819 adapter->rx_vlan_header_insertion = 3820 be64_to_cpu(crq->query_capability.number); 3821 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3822 adapter->rx_vlan_header_insertion); 3823 break; 3824 case MAX_TX_SG_ENTRIES: 3825 adapter->max_tx_sg_entries = 3826 be64_to_cpu(crq->query_capability.number); 3827 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3828 adapter->max_tx_sg_entries); 3829 break; 3830 case RX_SG_SUPPORTED: 3831 adapter->rx_sg_supported = 3832 be64_to_cpu(crq->query_capability.number); 3833 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3834 adapter->rx_sg_supported); 3835 break; 3836 case OPT_TX_COMP_SUB_QUEUES: 3837 adapter->opt_tx_comp_sub_queues = 3838 be64_to_cpu(crq->query_capability.number); 3839 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3840 adapter->opt_tx_comp_sub_queues); 3841 break; 3842 case OPT_RX_COMP_QUEUES: 3843 adapter->opt_rx_comp_queues = 3844 be64_to_cpu(crq->query_capability.number); 3845 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3846 adapter->opt_rx_comp_queues); 3847 break; 3848 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3849 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3850 be64_to_cpu(crq->query_capability.number); 3851 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3852 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3853 break; 3854 case OPT_TX_ENTRIES_PER_SUBCRQ: 3855 adapter->opt_tx_entries_per_subcrq = 3856 be64_to_cpu(crq->query_capability.number); 3857 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3858 adapter->opt_tx_entries_per_subcrq); 3859 break; 3860 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3861 adapter->opt_rxba_entries_per_subcrq = 3862 be64_to_cpu(crq->query_capability.number); 3863 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3864 adapter->opt_rxba_entries_per_subcrq); 3865 break; 3866 case TX_RX_DESC_REQ: 3867 adapter->tx_rx_desc_req = crq->query_capability.number; 3868 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3869 adapter->tx_rx_desc_req); 3870 break; 3871 3872 default: 3873 netdev_err(netdev, "Got invalid cap rsp %d\n", 3874 crq->query_capability.capability); 3875 } 3876 3877 out: 3878 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3879 adapter->wait_capability = false; 3880 ibmvnic_send_req_caps(adapter, 0); 3881 } 3882 } 3883 3884 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3885 struct ibmvnic_adapter *adapter) 3886 { 3887 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3888 struct net_device *netdev = adapter->netdev; 3889 struct device *dev = &adapter->vdev->dev; 3890 u64 *u64_crq = (u64 *)crq; 3891 long rc; 3892 3893 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3894 (unsigned long int)cpu_to_be64(u64_crq[0]), 3895 (unsigned long int)cpu_to_be64(u64_crq[1])); 3896 switch (gen_crq->first) { 3897 case IBMVNIC_CRQ_INIT_RSP: 3898 switch (gen_crq->cmd) { 3899 case IBMVNIC_CRQ_INIT: 3900 dev_info(dev, "Partner initialized\n"); 3901 adapter->from_passive_init = true; 3902 complete(&adapter->init_done); 3903 break; 3904 case IBMVNIC_CRQ_INIT_COMPLETE: 3905 dev_info(dev, "Partner initialization complete\n"); 3906 send_version_xchg(adapter); 3907 break; 3908 default: 3909 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3910 } 3911 return; 3912 case IBMVNIC_CRQ_XPORT_EVENT: 3913 netif_carrier_off(netdev); 3914 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3915 dev_info(dev, "Migrated, re-enabling adapter\n"); 3916 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 3917 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3918 dev_info(dev, "Backing device failover detected\n"); 3919 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 3920 } else { 3921 /* The adapter lost the connection */ 3922 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3923 gen_crq->cmd); 3924 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3925 } 3926 return; 3927 case IBMVNIC_CRQ_CMD_RSP: 3928 break; 3929 default: 3930 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3931 gen_crq->first); 3932 return; 3933 } 3934 3935 switch (gen_crq->cmd) { 3936 case VERSION_EXCHANGE_RSP: 3937 rc = crq->version_exchange_rsp.rc.code; 3938 if (rc) { 3939 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3940 break; 3941 } 3942 dev_info(dev, "Partner protocol version is %d\n", 3943 crq->version_exchange_rsp.version); 3944 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3945 ibmvnic_version) 3946 ibmvnic_version = 3947 be16_to_cpu(crq->version_exchange_rsp.version); 3948 send_cap_queries(adapter); 3949 break; 3950 case QUERY_CAPABILITY_RSP: 3951 handle_query_cap_rsp(crq, adapter); 3952 break; 3953 case QUERY_MAP_RSP: 3954 handle_query_map_rsp(crq, adapter); 3955 break; 3956 case REQUEST_MAP_RSP: 3957 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 3958 complete(&adapter->fw_done); 3959 break; 3960 case REQUEST_UNMAP_RSP: 3961 handle_request_unmap_rsp(crq, adapter); 3962 break; 3963 case REQUEST_CAPABILITY_RSP: 3964 handle_request_cap_rsp(crq, adapter); 3965 break; 3966 case LOGIN_RSP: 3967 netdev_dbg(netdev, "Got Login Response\n"); 3968 handle_login_rsp(crq, adapter); 3969 break; 3970 case LOGICAL_LINK_STATE_RSP: 3971 netdev_dbg(netdev, 3972 "Got Logical Link State Response, state: %d rc: %d\n", 3973 crq->logical_link_state_rsp.link_state, 3974 crq->logical_link_state_rsp.rc.code); 3975 adapter->logical_link_state = 3976 crq->logical_link_state_rsp.link_state; 3977 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3978 complete(&adapter->init_done); 3979 break; 3980 case LINK_STATE_INDICATION: 3981 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3982 adapter->phys_link_state = 3983 crq->link_state_indication.phys_link_state; 3984 adapter->logical_link_state = 3985 crq->link_state_indication.logical_link_state; 3986 break; 3987 case CHANGE_MAC_ADDR_RSP: 3988 netdev_dbg(netdev, "Got MAC address change Response\n"); 3989 handle_change_mac_rsp(crq, adapter); 3990 break; 3991 case ERROR_INDICATION: 3992 netdev_dbg(netdev, "Got Error Indication\n"); 3993 handle_error_indication(crq, adapter); 3994 break; 3995 case REQUEST_ERROR_RSP: 3996 netdev_dbg(netdev, "Got Error Detail Response\n"); 3997 handle_error_info_rsp(crq, adapter); 3998 break; 3999 case REQUEST_STATISTICS_RSP: 4000 netdev_dbg(netdev, "Got Statistics Response\n"); 4001 complete(&adapter->stats_done); 4002 break; 4003 case QUERY_IP_OFFLOAD_RSP: 4004 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4005 handle_query_ip_offload_rsp(adapter); 4006 break; 4007 case MULTICAST_CTRL_RSP: 4008 netdev_dbg(netdev, "Got multicast control Response\n"); 4009 break; 4010 case CONTROL_IP_OFFLOAD_RSP: 4011 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4012 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4013 sizeof(adapter->ip_offload_ctrl), 4014 DMA_TO_DEVICE); 4015 complete(&adapter->init_done); 4016 break; 4017 case COLLECT_FW_TRACE_RSP: 4018 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4019 complete(&adapter->fw_done); 4020 break; 4021 case GET_VPD_SIZE_RSP: 4022 handle_vpd_size_rsp(crq, adapter); 4023 break; 4024 case GET_VPD_RSP: 4025 handle_vpd_rsp(crq, adapter); 4026 break; 4027 default: 4028 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4029 gen_crq->cmd); 4030 } 4031 } 4032 4033 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4034 { 4035 struct ibmvnic_adapter *adapter = instance; 4036 4037 tasklet_schedule(&adapter->tasklet); 4038 return IRQ_HANDLED; 4039 } 4040 4041 static void ibmvnic_tasklet(void *data) 4042 { 4043 struct ibmvnic_adapter *adapter = data; 4044 struct ibmvnic_crq_queue *queue = &adapter->crq; 4045 union ibmvnic_crq *crq; 4046 unsigned long flags; 4047 bool done = false; 4048 4049 spin_lock_irqsave(&queue->lock, flags); 4050 while (!done) { 4051 /* Pull all the valid messages off the CRQ */ 4052 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4053 ibmvnic_handle_crq(crq, adapter); 4054 crq->generic.first = 0; 4055 } 4056 4057 /* remain in tasklet until all 4058 * capabilities responses are received 4059 */ 4060 if (!adapter->wait_capability) 4061 done = true; 4062 } 4063 /* if capabilities CRQ's were sent in this tasklet, the following 4064 * tasklet must wait until all responses are received 4065 */ 4066 if (atomic_read(&adapter->running_cap_crqs) != 0) 4067 adapter->wait_capability = true; 4068 spin_unlock_irqrestore(&queue->lock, flags); 4069 } 4070 4071 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4072 { 4073 struct vio_dev *vdev = adapter->vdev; 4074 int rc; 4075 4076 do { 4077 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4078 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4079 4080 if (rc) 4081 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4082 4083 return rc; 4084 } 4085 4086 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4087 { 4088 struct ibmvnic_crq_queue *crq = &adapter->crq; 4089 struct device *dev = &adapter->vdev->dev; 4090 struct vio_dev *vdev = adapter->vdev; 4091 int rc; 4092 4093 /* Close the CRQ */ 4094 do { 4095 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4096 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4097 4098 /* Clean out the queue */ 4099 memset(crq->msgs, 0, PAGE_SIZE); 4100 crq->cur = 0; 4101 4102 /* And re-open it again */ 4103 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4104 crq->msg_token, PAGE_SIZE); 4105 4106 if (rc == H_CLOSED) 4107 /* Adapter is good, but other end is not ready */ 4108 dev_warn(dev, "Partner adapter not ready\n"); 4109 else if (rc != 0) 4110 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4111 4112 return rc; 4113 } 4114 4115 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4116 { 4117 struct ibmvnic_crq_queue *crq = &adapter->crq; 4118 struct vio_dev *vdev = adapter->vdev; 4119 long rc; 4120 4121 if (!crq->msgs) 4122 return; 4123 4124 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4125 free_irq(vdev->irq, adapter); 4126 tasklet_kill(&adapter->tasklet); 4127 do { 4128 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4129 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4130 4131 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4132 DMA_BIDIRECTIONAL); 4133 free_page((unsigned long)crq->msgs); 4134 crq->msgs = NULL; 4135 } 4136 4137 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4138 { 4139 struct ibmvnic_crq_queue *crq = &adapter->crq; 4140 struct device *dev = &adapter->vdev->dev; 4141 struct vio_dev *vdev = adapter->vdev; 4142 int rc, retrc = -ENOMEM; 4143 4144 if (crq->msgs) 4145 return 0; 4146 4147 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4148 /* Should we allocate more than one page? */ 4149 4150 if (!crq->msgs) 4151 return -ENOMEM; 4152 4153 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4154 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4155 DMA_BIDIRECTIONAL); 4156 if (dma_mapping_error(dev, crq->msg_token)) 4157 goto map_failed; 4158 4159 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4160 crq->msg_token, PAGE_SIZE); 4161 4162 if (rc == H_RESOURCE) 4163 /* maybe kexecing and resource is busy. try a reset */ 4164 rc = ibmvnic_reset_crq(adapter); 4165 retrc = rc; 4166 4167 if (rc == H_CLOSED) { 4168 dev_warn(dev, "Partner adapter not ready\n"); 4169 } else if (rc) { 4170 dev_warn(dev, "Error %d opening adapter\n", rc); 4171 goto reg_crq_failed; 4172 } 4173 4174 retrc = 0; 4175 4176 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4177 (unsigned long)adapter); 4178 4179 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4180 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4181 adapter); 4182 if (rc) { 4183 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4184 vdev->irq, rc); 4185 goto req_irq_failed; 4186 } 4187 4188 rc = vio_enable_interrupts(vdev); 4189 if (rc) { 4190 dev_err(dev, "Error %d enabling interrupts\n", rc); 4191 goto req_irq_failed; 4192 } 4193 4194 crq->cur = 0; 4195 spin_lock_init(&crq->lock); 4196 4197 return retrc; 4198 4199 req_irq_failed: 4200 tasklet_kill(&adapter->tasklet); 4201 do { 4202 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4203 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4204 reg_crq_failed: 4205 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4206 map_failed: 4207 free_page((unsigned long)crq->msgs); 4208 crq->msgs = NULL; 4209 return retrc; 4210 } 4211 4212 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4213 { 4214 struct device *dev = &adapter->vdev->dev; 4215 unsigned long timeout = msecs_to_jiffies(30000); 4216 int rc; 4217 4218 if (adapter->resetting && !adapter->wait_for_reset) { 4219 rc = ibmvnic_reset_crq(adapter); 4220 if (!rc) 4221 rc = vio_enable_interrupts(adapter->vdev); 4222 } else { 4223 rc = init_crq_queue(adapter); 4224 } 4225 4226 if (rc) { 4227 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4228 return rc; 4229 } 4230 4231 adapter->from_passive_init = false; 4232 4233 init_completion(&adapter->init_done); 4234 adapter->init_done_rc = 0; 4235 ibmvnic_send_crq_init(adapter); 4236 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4237 dev_err(dev, "Initialization sequence timed out\n"); 4238 return -1; 4239 } 4240 4241 if (adapter->init_done_rc) { 4242 release_crq_queue(adapter); 4243 return adapter->init_done_rc; 4244 } 4245 4246 if (adapter->from_passive_init) { 4247 adapter->state = VNIC_OPEN; 4248 adapter->from_passive_init = false; 4249 return -1; 4250 } 4251 4252 if (adapter->resetting && !adapter->wait_for_reset) 4253 rc = reset_sub_crq_queues(adapter); 4254 else 4255 rc = init_sub_crqs(adapter); 4256 if (rc) { 4257 dev_err(dev, "Initialization of sub crqs failed\n"); 4258 release_crq_queue(adapter); 4259 return rc; 4260 } 4261 4262 rc = init_sub_crq_irqs(adapter); 4263 if (rc) { 4264 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4265 release_crq_queue(adapter); 4266 } 4267 4268 return rc; 4269 } 4270 4271 static struct device_attribute dev_attr_failover; 4272 4273 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4274 { 4275 struct ibmvnic_adapter *adapter; 4276 struct net_device *netdev; 4277 unsigned char *mac_addr_p; 4278 int rc; 4279 4280 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4281 dev->unit_address); 4282 4283 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4284 VETH_MAC_ADDR, NULL); 4285 if (!mac_addr_p) { 4286 dev_err(&dev->dev, 4287 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4288 __FILE__, __LINE__); 4289 return 0; 4290 } 4291 4292 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4293 IBMVNIC_MAX_QUEUES); 4294 if (!netdev) 4295 return -ENOMEM; 4296 4297 adapter = netdev_priv(netdev); 4298 adapter->state = VNIC_PROBING; 4299 dev_set_drvdata(&dev->dev, netdev); 4300 adapter->vdev = dev; 4301 adapter->netdev = netdev; 4302 4303 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4304 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4305 netdev->irq = dev->irq; 4306 netdev->netdev_ops = &ibmvnic_netdev_ops; 4307 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4308 SET_NETDEV_DEV(netdev, &dev->dev); 4309 4310 spin_lock_init(&adapter->stats_lock); 4311 4312 INIT_LIST_HEAD(&adapter->errors); 4313 spin_lock_init(&adapter->error_list_lock); 4314 4315 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4316 INIT_LIST_HEAD(&adapter->rwi_list); 4317 mutex_init(&adapter->reset_lock); 4318 mutex_init(&adapter->rwi_lock); 4319 adapter->resetting = false; 4320 4321 adapter->mac_change_pending = false; 4322 4323 do { 4324 rc = ibmvnic_init(adapter); 4325 if (rc && rc != EAGAIN) 4326 goto ibmvnic_init_fail; 4327 } while (rc == EAGAIN); 4328 4329 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4330 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4331 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4332 4333 rc = device_create_file(&dev->dev, &dev_attr_failover); 4334 if (rc) 4335 goto ibmvnic_init_fail; 4336 4337 netif_carrier_off(netdev); 4338 rc = register_netdev(netdev); 4339 if (rc) { 4340 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4341 goto ibmvnic_register_fail; 4342 } 4343 dev_info(&dev->dev, "ibmvnic registered\n"); 4344 4345 adapter->state = VNIC_PROBED; 4346 4347 adapter->wait_for_reset = false; 4348 4349 return 0; 4350 4351 ibmvnic_register_fail: 4352 device_remove_file(&dev->dev, &dev_attr_failover); 4353 4354 ibmvnic_init_fail: 4355 release_sub_crqs(adapter); 4356 release_crq_queue(adapter); 4357 free_netdev(netdev); 4358 4359 return rc; 4360 } 4361 4362 static int ibmvnic_remove(struct vio_dev *dev) 4363 { 4364 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4365 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4366 4367 adapter->state = VNIC_REMOVING; 4368 unregister_netdev(netdev); 4369 mutex_lock(&adapter->reset_lock); 4370 4371 release_resources(adapter); 4372 release_sub_crqs(adapter); 4373 release_crq_queue(adapter); 4374 4375 adapter->state = VNIC_REMOVED; 4376 4377 mutex_unlock(&adapter->reset_lock); 4378 device_remove_file(&dev->dev, &dev_attr_failover); 4379 free_netdev(netdev); 4380 dev_set_drvdata(&dev->dev, NULL); 4381 4382 return 0; 4383 } 4384 4385 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4386 const char *buf, size_t count) 4387 { 4388 struct net_device *netdev = dev_get_drvdata(dev); 4389 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4390 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4391 __be64 session_token; 4392 long rc; 4393 4394 if (!sysfs_streq(buf, "1")) 4395 return -EINVAL; 4396 4397 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4398 H_GET_SESSION_TOKEN, 0, 0, 0); 4399 if (rc) { 4400 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4401 rc); 4402 return -EINVAL; 4403 } 4404 4405 session_token = (__be64)retbuf[0]; 4406 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4407 be64_to_cpu(session_token)); 4408 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4409 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4410 if (rc) { 4411 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4412 rc); 4413 return -EINVAL; 4414 } 4415 4416 return count; 4417 } 4418 4419 static DEVICE_ATTR(failover, 0200, NULL, failover_store); 4420 4421 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4422 { 4423 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4424 struct ibmvnic_adapter *adapter; 4425 struct iommu_table *tbl; 4426 unsigned long ret = 0; 4427 int i; 4428 4429 tbl = get_iommu_table_base(&vdev->dev); 4430 4431 /* netdev inits at probe time along with the structures we need below*/ 4432 if (!netdev) 4433 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4434 4435 adapter = netdev_priv(netdev); 4436 4437 ret += PAGE_SIZE; /* the crq message queue */ 4438 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4439 4440 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4441 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4442 4443 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4444 i++) 4445 ret += adapter->rx_pool[i].size * 4446 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4447 4448 return ret; 4449 } 4450 4451 static int ibmvnic_resume(struct device *dev) 4452 { 4453 struct net_device *netdev = dev_get_drvdata(dev); 4454 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4455 4456 if (adapter->state != VNIC_OPEN) 4457 return 0; 4458 4459 tasklet_schedule(&adapter->tasklet); 4460 4461 return 0; 4462 } 4463 4464 static const struct vio_device_id ibmvnic_device_table[] = { 4465 {"network", "IBM,vnic"}, 4466 {"", "" } 4467 }; 4468 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4469 4470 static const struct dev_pm_ops ibmvnic_pm_ops = { 4471 .resume = ibmvnic_resume 4472 }; 4473 4474 static struct vio_driver ibmvnic_driver = { 4475 .id_table = ibmvnic_device_table, 4476 .probe = ibmvnic_probe, 4477 .remove = ibmvnic_remove, 4478 .get_desired_dma = ibmvnic_get_desired_dma, 4479 .name = ibmvnic_driver_name, 4480 .pm = &ibmvnic_pm_ops, 4481 }; 4482 4483 /* module functions */ 4484 static int __init ibmvnic_module_init(void) 4485 { 4486 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4487 IBMVNIC_DRIVER_VERSION); 4488 4489 return vio_register_driver(&ibmvnic_driver); 4490 } 4491 4492 static void __exit ibmvnic_module_exit(void) 4493 { 4494 vio_unregister_driver(&ibmvnic_driver); 4495 } 4496 4497 module_init(ibmvnic_module_init); 4498 module_exit(ibmvnic_module_exit); 4499