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