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