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