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/debugfs.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 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 <santi_leon@yahoo.com>"); 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 void release_sub_crqs_no_irqs(struct ibmvnic_adapter *); 93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 98 union sub_crq *sub_crq); 99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 101 static int enable_scrq_irq(struct ibmvnic_adapter *, 102 struct ibmvnic_sub_crq_queue *); 103 static int disable_scrq_irq(struct ibmvnic_adapter *, 104 struct ibmvnic_sub_crq_queue *); 105 static int pending_scrq(struct ibmvnic_adapter *, 106 struct ibmvnic_sub_crq_queue *); 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 108 struct ibmvnic_sub_crq_queue *); 109 static int ibmvnic_poll(struct napi_struct *napi, int data); 110 static void send_map_query(struct ibmvnic_adapter *adapter); 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 112 static void send_request_unmap(struct ibmvnic_adapter *, u8); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 149 unsigned long length, unsigned long *number, 150 unsigned long *irq) 151 { 152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 153 long rc; 154 155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 156 *number = retbuf[0]; 157 *irq = retbuf[1]; 158 159 return rc; 160 } 161 162 /* net_device_ops functions */ 163 164 static void init_rx_pool(struct ibmvnic_adapter *adapter, 165 struct ibmvnic_rx_pool *rx_pool, int num, int index, 166 int buff_size, int active) 167 { 168 netdev_dbg(adapter->netdev, 169 "Initializing rx_pool %d, %d buffs, %d bytes each\n", 170 index, num, buff_size); 171 rx_pool->size = num; 172 rx_pool->index = index; 173 rx_pool->buff_size = buff_size; 174 rx_pool->active = active; 175 } 176 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 178 struct ibmvnic_long_term_buff *ltb, int size) 179 { 180 struct device *dev = &adapter->vdev->dev; 181 182 ltb->size = size; 183 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 184 GFP_KERNEL); 185 186 if (!ltb->buff) { 187 dev_err(dev, "Couldn't alloc long term buffer\n"); 188 return -ENOMEM; 189 } 190 ltb->map_id = adapter->map_id; 191 adapter->map_id++; 192 193 init_completion(&adapter->fw_done); 194 send_request_map(adapter, ltb->addr, 195 ltb->size, ltb->map_id); 196 wait_for_completion(&adapter->fw_done); 197 return 0; 198 } 199 200 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 201 struct ibmvnic_long_term_buff *ltb) 202 { 203 struct device *dev = &adapter->vdev->dev; 204 205 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 206 if (!adapter->failover) 207 send_request_unmap(adapter, ltb->map_id); 208 } 209 210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter, 211 struct ibmvnic_rx_pool *pool) 212 { 213 struct device *dev = &adapter->vdev->dev; 214 int i; 215 216 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL); 217 if (!pool->free_map) 218 return -ENOMEM; 219 220 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff), 221 GFP_KERNEL); 222 223 if (!pool->rx_buff) { 224 dev_err(dev, "Couldn't alloc rx buffers\n"); 225 kfree(pool->free_map); 226 return -ENOMEM; 227 } 228 229 if (alloc_long_term_buff(adapter, &pool->long_term_buff, 230 pool->size * pool->buff_size)) { 231 kfree(pool->free_map); 232 kfree(pool->rx_buff); 233 return -ENOMEM; 234 } 235 236 for (i = 0; i < pool->size; ++i) 237 pool->free_map[i] = i; 238 239 atomic_set(&pool->available, 0); 240 pool->next_alloc = 0; 241 pool->next_free = 0; 242 243 return 0; 244 } 245 246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 247 struct ibmvnic_rx_pool *pool) 248 { 249 int count = pool->size - atomic_read(&pool->available); 250 struct device *dev = &adapter->vdev->dev; 251 int buffers_added = 0; 252 unsigned long lpar_rc; 253 union sub_crq sub_crq; 254 struct sk_buff *skb; 255 unsigned int offset; 256 dma_addr_t dma_addr; 257 unsigned char *dst; 258 u64 *handle_array; 259 int shift = 0; 260 int index; 261 int i; 262 263 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 264 be32_to_cpu(adapter->login_rsp_buf-> 265 off_rxadd_subcrqs)); 266 267 for (i = 0; i < count; ++i) { 268 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 269 if (!skb) { 270 dev_err(dev, "Couldn't replenish rx buff\n"); 271 adapter->replenish_no_mem++; 272 break; 273 } 274 275 index = pool->free_map[pool->next_free]; 276 277 if (pool->rx_buff[index].skb) 278 dev_err(dev, "Inconsistent free_map!\n"); 279 280 /* Copy the skb to the long term mapped DMA buffer */ 281 offset = index * pool->buff_size; 282 dst = pool->long_term_buff.buff + offset; 283 memset(dst, 0, pool->buff_size); 284 dma_addr = pool->long_term_buff.addr + offset; 285 pool->rx_buff[index].data = dst; 286 287 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 288 pool->rx_buff[index].dma = dma_addr; 289 pool->rx_buff[index].skb = skb; 290 pool->rx_buff[index].pool_index = pool->index; 291 pool->rx_buff[index].size = pool->buff_size; 292 293 memset(&sub_crq, 0, sizeof(sub_crq)); 294 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 295 sub_crq.rx_add.correlator = 296 cpu_to_be64((u64)&pool->rx_buff[index]); 297 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 298 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 299 300 /* The length field of the sCRQ is defined to be 24 bits so the 301 * buffer size needs to be left shifted by a byte before it is 302 * converted to big endian to prevent the last byte from being 303 * truncated. 304 */ 305 #ifdef __LITTLE_ENDIAN__ 306 shift = 8; 307 #endif 308 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 309 310 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 311 &sub_crq); 312 if (lpar_rc != H_SUCCESS) 313 goto failure; 314 315 buffers_added++; 316 adapter->replenish_add_buff_success++; 317 pool->next_free = (pool->next_free + 1) % pool->size; 318 } 319 atomic_add(buffers_added, &pool->available); 320 return; 321 322 failure: 323 dev_info(dev, "replenish pools failure\n"); 324 pool->free_map[pool->next_free] = index; 325 pool->rx_buff[index].skb = NULL; 326 if (!dma_mapping_error(dev, dma_addr)) 327 dma_unmap_single(dev, dma_addr, pool->buff_size, 328 DMA_FROM_DEVICE); 329 330 dev_kfree_skb_any(skb); 331 adapter->replenish_add_buff_failure++; 332 atomic_add(buffers_added, &pool->available); 333 } 334 335 static void replenish_pools(struct ibmvnic_adapter *adapter) 336 { 337 int i; 338 339 if (adapter->migrated) 340 return; 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 free_rx_pool(struct ibmvnic_adapter *adapter, 351 struct ibmvnic_rx_pool *pool) 352 { 353 int i; 354 355 kfree(pool->free_map); 356 pool->free_map = NULL; 357 358 if (!pool->rx_buff) 359 return; 360 361 for (i = 0; i < pool->size; i++) { 362 if (pool->rx_buff[i].skb) { 363 dev_kfree_skb_any(pool->rx_buff[i].skb); 364 pool->rx_buff[i].skb = NULL; 365 } 366 } 367 kfree(pool->rx_buff); 368 pool->rx_buff = NULL; 369 } 370 371 static int ibmvnic_open(struct net_device *netdev) 372 { 373 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 374 struct device *dev = &adapter->vdev->dev; 375 struct ibmvnic_tx_pool *tx_pool; 376 union ibmvnic_crq crq; 377 int rxadd_subcrqs; 378 u64 *size_array; 379 int tx_subcrqs; 380 int i, j; 381 382 rxadd_subcrqs = 383 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 384 tx_subcrqs = 385 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 386 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 387 be32_to_cpu(adapter->login_rsp_buf-> 388 off_rxadd_buff_size)); 389 adapter->map_id = 1; 390 adapter->napi = kcalloc(adapter->req_rx_queues, 391 sizeof(struct napi_struct), GFP_KERNEL); 392 if (!adapter->napi) 393 goto alloc_napi_failed; 394 for (i = 0; i < adapter->req_rx_queues; i++) { 395 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 396 NAPI_POLL_WEIGHT); 397 napi_enable(&adapter->napi[i]); 398 } 399 adapter->rx_pool = 400 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); 401 402 if (!adapter->rx_pool) 403 goto rx_pool_arr_alloc_failed; 404 send_map_query(adapter); 405 for (i = 0; i < rxadd_subcrqs; i++) { 406 init_rx_pool(adapter, &adapter->rx_pool[i], 407 adapter->req_rx_add_entries_per_subcrq, i, 408 be64_to_cpu(size_array[i]), 1); 409 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) { 410 dev_err(dev, "Couldn't alloc rx pool\n"); 411 goto rx_pool_alloc_failed; 412 } 413 } 414 adapter->tx_pool = 415 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 416 417 if (!adapter->tx_pool) 418 goto tx_pool_arr_alloc_failed; 419 for (i = 0; i < tx_subcrqs; i++) { 420 tx_pool = &adapter->tx_pool[i]; 421 tx_pool->tx_buff = 422 kcalloc(adapter->req_tx_entries_per_subcrq, 423 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); 424 if (!tx_pool->tx_buff) 425 goto tx_pool_alloc_failed; 426 427 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 428 adapter->req_tx_entries_per_subcrq * 429 adapter->req_mtu)) 430 goto tx_ltb_alloc_failed; 431 432 tx_pool->free_map = 433 kcalloc(adapter->req_tx_entries_per_subcrq, 434 sizeof(int), GFP_KERNEL); 435 if (!tx_pool->free_map) 436 goto tx_fm_alloc_failed; 437 438 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 439 tx_pool->free_map[j] = j; 440 441 tx_pool->consumer_index = 0; 442 tx_pool->producer_index = 0; 443 } 444 adapter->bounce_buffer_size = 445 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; 446 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size, 447 GFP_KERNEL); 448 if (!adapter->bounce_buffer) 449 goto bounce_alloc_failed; 450 451 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer, 452 adapter->bounce_buffer_size, 453 DMA_TO_DEVICE); 454 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 455 dev_err(dev, "Couldn't map tx bounce buffer\n"); 456 goto bounce_map_failed; 457 } 458 replenish_pools(adapter); 459 460 /* We're ready to receive frames, enable the sub-crq interrupts and 461 * set the logical link state to up 462 */ 463 for (i = 0; i < adapter->req_rx_queues; i++) 464 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 465 466 for (i = 0; i < adapter->req_tx_queues; i++) 467 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 468 469 memset(&crq, 0, sizeof(crq)); 470 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 471 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 472 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; 473 ibmvnic_send_crq(adapter, &crq); 474 475 netif_tx_start_all_queues(netdev); 476 477 return 0; 478 479 bounce_map_failed: 480 kfree(adapter->bounce_buffer); 481 bounce_alloc_failed: 482 i = tx_subcrqs - 1; 483 kfree(adapter->tx_pool[i].free_map); 484 tx_fm_alloc_failed: 485 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff); 486 tx_ltb_alloc_failed: 487 kfree(adapter->tx_pool[i].tx_buff); 488 tx_pool_alloc_failed: 489 for (j = 0; j < i; j++) { 490 kfree(adapter->tx_pool[j].tx_buff); 491 free_long_term_buff(adapter, 492 &adapter->tx_pool[j].long_term_buff); 493 kfree(adapter->tx_pool[j].free_map); 494 } 495 kfree(adapter->tx_pool); 496 adapter->tx_pool = NULL; 497 tx_pool_arr_alloc_failed: 498 i = rxadd_subcrqs; 499 rx_pool_alloc_failed: 500 for (j = 0; j < i; j++) { 501 free_rx_pool(adapter, &adapter->rx_pool[j]); 502 free_long_term_buff(adapter, 503 &adapter->rx_pool[j].long_term_buff); 504 } 505 kfree(adapter->rx_pool); 506 adapter->rx_pool = NULL; 507 rx_pool_arr_alloc_failed: 508 for (i = 0; i < adapter->req_rx_queues; i++) 509 napi_disable(&adapter->napi[i]); 510 alloc_napi_failed: 511 return -ENOMEM; 512 } 513 514 static int ibmvnic_close(struct net_device *netdev) 515 { 516 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 517 struct device *dev = &adapter->vdev->dev; 518 union ibmvnic_crq crq; 519 int i; 520 521 adapter->closing = true; 522 523 for (i = 0; i < adapter->req_rx_queues; i++) 524 napi_disable(&adapter->napi[i]); 525 526 if (!adapter->failover) 527 netif_tx_stop_all_queues(netdev); 528 529 if (adapter->bounce_buffer) { 530 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 531 dma_unmap_single(&adapter->vdev->dev, 532 adapter->bounce_buffer_dma, 533 adapter->bounce_buffer_size, 534 DMA_BIDIRECTIONAL); 535 adapter->bounce_buffer_dma = DMA_ERROR_CODE; 536 } 537 kfree(adapter->bounce_buffer); 538 adapter->bounce_buffer = NULL; 539 } 540 541 memset(&crq, 0, sizeof(crq)); 542 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 543 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 544 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; 545 ibmvnic_send_crq(adapter, &crq); 546 547 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 548 i++) { 549 kfree(adapter->tx_pool[i].tx_buff); 550 free_long_term_buff(adapter, 551 &adapter->tx_pool[i].long_term_buff); 552 kfree(adapter->tx_pool[i].free_map); 553 } 554 kfree(adapter->tx_pool); 555 adapter->tx_pool = NULL; 556 557 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 558 i++) { 559 free_rx_pool(adapter, &adapter->rx_pool[i]); 560 free_long_term_buff(adapter, 561 &adapter->rx_pool[i].long_term_buff); 562 } 563 kfree(adapter->rx_pool); 564 adapter->rx_pool = NULL; 565 566 adapter->closing = false; 567 568 return 0; 569 } 570 571 /** 572 * build_hdr_data - creates L2/L3/L4 header data buffer 573 * @hdr_field - bitfield determining needed headers 574 * @skb - socket buffer 575 * @hdr_len - array of header lengths 576 * @tot_len - total length of data 577 * 578 * Reads hdr_field to determine which headers are needed by firmware. 579 * Builds a buffer containing these headers. Saves individual header 580 * lengths and total buffer length to be used to build descriptors. 581 */ 582 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 583 int *hdr_len, u8 *hdr_data) 584 { 585 int len = 0; 586 u8 *hdr; 587 588 hdr_len[0] = sizeof(struct ethhdr); 589 590 if (skb->protocol == htons(ETH_P_IP)) { 591 hdr_len[1] = ip_hdr(skb)->ihl * 4; 592 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 593 hdr_len[2] = tcp_hdrlen(skb); 594 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 595 hdr_len[2] = sizeof(struct udphdr); 596 } else if (skb->protocol == htons(ETH_P_IPV6)) { 597 hdr_len[1] = sizeof(struct ipv6hdr); 598 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 599 hdr_len[2] = tcp_hdrlen(skb); 600 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 601 hdr_len[2] = sizeof(struct udphdr); 602 } 603 604 memset(hdr_data, 0, 120); 605 if ((hdr_field >> 6) & 1) { 606 hdr = skb_mac_header(skb); 607 memcpy(hdr_data, hdr, hdr_len[0]); 608 len += hdr_len[0]; 609 } 610 611 if ((hdr_field >> 5) & 1) { 612 hdr = skb_network_header(skb); 613 memcpy(hdr_data + len, hdr, hdr_len[1]); 614 len += hdr_len[1]; 615 } 616 617 if ((hdr_field >> 4) & 1) { 618 hdr = skb_transport_header(skb); 619 memcpy(hdr_data + len, hdr, hdr_len[2]); 620 len += hdr_len[2]; 621 } 622 return len; 623 } 624 625 /** 626 * create_hdr_descs - create header and header extension descriptors 627 * @hdr_field - bitfield determining needed headers 628 * @data - buffer containing header data 629 * @len - length of data buffer 630 * @hdr_len - array of individual header lengths 631 * @scrq_arr - descriptor array 632 * 633 * Creates header and, if needed, header extension descriptors and 634 * places them in a descriptor array, scrq_arr 635 */ 636 637 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 638 union sub_crq *scrq_arr) 639 { 640 union sub_crq hdr_desc; 641 int tmp_len = len; 642 u8 *data, *cur; 643 int tmp; 644 645 while (tmp_len > 0) { 646 cur = hdr_data + len - tmp_len; 647 648 memset(&hdr_desc, 0, sizeof(hdr_desc)); 649 if (cur != hdr_data) { 650 data = hdr_desc.hdr_ext.data; 651 tmp = tmp_len > 29 ? 29 : tmp_len; 652 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 653 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 654 hdr_desc.hdr_ext.len = tmp; 655 } else { 656 data = hdr_desc.hdr.data; 657 tmp = tmp_len > 24 ? 24 : tmp_len; 658 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 659 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 660 hdr_desc.hdr.len = tmp; 661 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 662 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 663 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 664 hdr_desc.hdr.flag = hdr_field << 1; 665 } 666 memcpy(data, cur, tmp); 667 tmp_len -= tmp; 668 *scrq_arr = hdr_desc; 669 scrq_arr++; 670 } 671 } 672 673 /** 674 * build_hdr_descs_arr - build a header descriptor array 675 * @skb - socket buffer 676 * @num_entries - number of descriptors to be sent 677 * @subcrq - first TX descriptor 678 * @hdr_field - bit field determining which headers will be sent 679 * 680 * This function will build a TX descriptor array with applicable 681 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 682 */ 683 684 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 685 int *num_entries, u8 hdr_field) 686 { 687 int hdr_len[3] = {0, 0, 0}; 688 int tot_len, len; 689 u8 *hdr_data = txbuff->hdr_data; 690 691 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 692 txbuff->hdr_data); 693 len = tot_len; 694 len -= 24; 695 if (len > 0) 696 num_entries += len % 29 ? len / 29 + 1 : len / 29; 697 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 698 txbuff->indir_arr + 1); 699 } 700 701 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 702 { 703 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 704 int queue_num = skb_get_queue_mapping(skb); 705 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 706 struct device *dev = &adapter->vdev->dev; 707 struct ibmvnic_tx_buff *tx_buff = NULL; 708 struct ibmvnic_sub_crq_queue *tx_scrq; 709 struct ibmvnic_tx_pool *tx_pool; 710 unsigned int tx_send_failed = 0; 711 unsigned int tx_map_failed = 0; 712 unsigned int tx_dropped = 0; 713 unsigned int tx_packets = 0; 714 unsigned int tx_bytes = 0; 715 dma_addr_t data_dma_addr; 716 struct netdev_queue *txq; 717 bool used_bounce = false; 718 unsigned long lpar_rc; 719 union sub_crq tx_crq; 720 unsigned int offset; 721 int num_entries = 1; 722 unsigned char *dst; 723 u64 *handle_array; 724 int index = 0; 725 int ret = 0; 726 727 tx_pool = &adapter->tx_pool[queue_num]; 728 tx_scrq = adapter->tx_scrq[queue_num]; 729 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 730 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 731 be32_to_cpu(adapter->login_rsp_buf-> 732 off_txsubm_subcrqs)); 733 if (adapter->migrated) { 734 tx_send_failed++; 735 tx_dropped++; 736 ret = NETDEV_TX_BUSY; 737 goto out; 738 } 739 740 index = tx_pool->free_map[tx_pool->consumer_index]; 741 offset = index * adapter->req_mtu; 742 dst = tx_pool->long_term_buff.buff + offset; 743 memset(dst, 0, adapter->req_mtu); 744 skb_copy_from_linear_data(skb, dst, skb->len); 745 data_dma_addr = tx_pool->long_term_buff.addr + offset; 746 747 tx_pool->consumer_index = 748 (tx_pool->consumer_index + 1) % 749 adapter->req_tx_entries_per_subcrq; 750 751 tx_buff = &tx_pool->tx_buff[index]; 752 tx_buff->skb = skb; 753 tx_buff->data_dma[0] = data_dma_addr; 754 tx_buff->data_len[0] = skb->len; 755 tx_buff->index = index; 756 tx_buff->pool_index = queue_num; 757 tx_buff->last_frag = true; 758 tx_buff->used_bounce = used_bounce; 759 760 memset(&tx_crq, 0, sizeof(tx_crq)); 761 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 762 tx_crq.v1.type = IBMVNIC_TX_DESC; 763 tx_crq.v1.n_crq_elem = 1; 764 tx_crq.v1.n_sge = 1; 765 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 766 tx_crq.v1.correlator = cpu_to_be32(index); 767 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 768 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 769 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 770 771 if (adapter->vlan_header_insertion) { 772 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 773 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 774 } 775 776 if (skb->protocol == htons(ETH_P_IP)) { 777 if (ip_hdr(skb)->version == 4) 778 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 779 else if (ip_hdr(skb)->version == 6) 780 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 781 782 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 783 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 784 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 785 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 786 } 787 788 if (skb->ip_summed == CHECKSUM_PARTIAL) { 789 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 790 hdrs += 2; 791 } 792 /* determine if l2/3/4 headers are sent to firmware */ 793 if ((*hdrs >> 7) & 1 && 794 (skb->protocol == htons(ETH_P_IP) || 795 skb->protocol == htons(ETH_P_IPV6))) { 796 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 797 tx_crq.v1.n_crq_elem = num_entries; 798 tx_buff->indir_arr[0] = tx_crq; 799 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 800 sizeof(tx_buff->indir_arr), 801 DMA_TO_DEVICE); 802 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 803 if (!firmware_has_feature(FW_FEATURE_CMO)) 804 dev_err(dev, "tx: unable to map descriptor array\n"); 805 tx_map_failed++; 806 tx_dropped++; 807 ret = NETDEV_TX_BUSY; 808 goto out; 809 } 810 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 811 (u64)tx_buff->indir_dma, 812 (u64)num_entries); 813 } else { 814 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 815 &tx_crq); 816 } 817 if (lpar_rc != H_SUCCESS) { 818 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 819 820 if (tx_pool->consumer_index == 0) 821 tx_pool->consumer_index = 822 adapter->req_tx_entries_per_subcrq - 1; 823 else 824 tx_pool->consumer_index--; 825 826 tx_send_failed++; 827 tx_dropped++; 828 ret = NETDEV_TX_BUSY; 829 goto out; 830 } 831 832 atomic_inc(&tx_scrq->used); 833 834 if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) { 835 netdev_info(netdev, "Stopping queue %d\n", queue_num); 836 netif_stop_subqueue(netdev, queue_num); 837 } 838 839 tx_packets++; 840 tx_bytes += skb->len; 841 txq->trans_start = jiffies; 842 ret = NETDEV_TX_OK; 843 844 out: 845 netdev->stats.tx_dropped += tx_dropped; 846 netdev->stats.tx_bytes += tx_bytes; 847 netdev->stats.tx_packets += tx_packets; 848 adapter->tx_send_failed += tx_send_failed; 849 adapter->tx_map_failed += tx_map_failed; 850 851 return ret; 852 } 853 854 static void ibmvnic_set_multi(struct net_device *netdev) 855 { 856 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 857 struct netdev_hw_addr *ha; 858 union ibmvnic_crq crq; 859 860 memset(&crq, 0, sizeof(crq)); 861 crq.request_capability.first = IBMVNIC_CRQ_CMD; 862 crq.request_capability.cmd = REQUEST_CAPABILITY; 863 864 if (netdev->flags & IFF_PROMISC) { 865 if (!adapter->promisc_supported) 866 return; 867 } else { 868 if (netdev->flags & IFF_ALLMULTI) { 869 /* Accept all multicast */ 870 memset(&crq, 0, sizeof(crq)); 871 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 872 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 873 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 874 ibmvnic_send_crq(adapter, &crq); 875 } else if (netdev_mc_empty(netdev)) { 876 /* Reject all multicast */ 877 memset(&crq, 0, sizeof(crq)); 878 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 879 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 880 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 881 ibmvnic_send_crq(adapter, &crq); 882 } else { 883 /* Accept one or more multicast(s) */ 884 netdev_for_each_mc_addr(ha, netdev) { 885 memset(&crq, 0, sizeof(crq)); 886 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 887 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 888 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 889 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 890 ha->addr); 891 ibmvnic_send_crq(adapter, &crq); 892 } 893 } 894 } 895 } 896 897 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 898 { 899 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 900 struct sockaddr *addr = p; 901 union ibmvnic_crq crq; 902 903 if (!is_valid_ether_addr(addr->sa_data)) 904 return -EADDRNOTAVAIL; 905 906 memset(&crq, 0, sizeof(crq)); 907 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 908 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 909 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 910 ibmvnic_send_crq(adapter, &crq); 911 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 912 return 0; 913 } 914 915 static void ibmvnic_tx_timeout(struct net_device *dev) 916 { 917 struct ibmvnic_adapter *adapter = netdev_priv(dev); 918 int rc; 919 920 /* Adapter timed out, resetting it */ 921 release_sub_crqs(adapter); 922 rc = ibmvnic_reset_crq(adapter); 923 if (rc) 924 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 925 else 926 ibmvnic_send_crq_init(adapter); 927 } 928 929 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 930 struct ibmvnic_rx_buff *rx_buff) 931 { 932 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 933 934 rx_buff->skb = NULL; 935 936 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 937 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 938 939 atomic_dec(&pool->available); 940 } 941 942 static int ibmvnic_poll(struct napi_struct *napi, int budget) 943 { 944 struct net_device *netdev = napi->dev; 945 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 946 int scrq_num = (int)(napi - adapter->napi); 947 int frames_processed = 0; 948 restart_poll: 949 while (frames_processed < budget) { 950 struct sk_buff *skb; 951 struct ibmvnic_rx_buff *rx_buff; 952 union sub_crq *next; 953 u32 length; 954 u16 offset; 955 u8 flags = 0; 956 957 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 958 break; 959 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 960 rx_buff = 961 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 962 rx_comp.correlator); 963 /* do error checking */ 964 if (next->rx_comp.rc) { 965 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 966 /* free the entry */ 967 next->rx_comp.first = 0; 968 remove_buff_from_pool(adapter, rx_buff); 969 break; 970 } 971 972 length = be32_to_cpu(next->rx_comp.len); 973 offset = be16_to_cpu(next->rx_comp.off_frame_data); 974 flags = next->rx_comp.flags; 975 skb = rx_buff->skb; 976 skb_copy_to_linear_data(skb, rx_buff->data + offset, 977 length); 978 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); 979 /* free the entry */ 980 next->rx_comp.first = 0; 981 remove_buff_from_pool(adapter, rx_buff); 982 983 skb_put(skb, length); 984 skb->protocol = eth_type_trans(skb, netdev); 985 986 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 987 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 988 skb->ip_summed = CHECKSUM_UNNECESSARY; 989 } 990 991 length = skb->len; 992 napi_gro_receive(napi, skb); /* send it up */ 993 netdev->stats.rx_packets++; 994 netdev->stats.rx_bytes += length; 995 frames_processed++; 996 } 997 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 998 999 if (frames_processed < budget) { 1000 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1001 napi_complete_done(napi, frames_processed); 1002 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1003 napi_reschedule(napi)) { 1004 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1005 goto restart_poll; 1006 } 1007 } 1008 return frames_processed; 1009 } 1010 1011 #ifdef CONFIG_NET_POLL_CONTROLLER 1012 static void ibmvnic_netpoll_controller(struct net_device *dev) 1013 { 1014 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1015 int i; 1016 1017 replenish_pools(netdev_priv(dev)); 1018 for (i = 0; i < adapter->req_rx_queues; i++) 1019 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1020 adapter->rx_scrq[i]); 1021 } 1022 #endif 1023 1024 static const struct net_device_ops ibmvnic_netdev_ops = { 1025 .ndo_open = ibmvnic_open, 1026 .ndo_stop = ibmvnic_close, 1027 .ndo_start_xmit = ibmvnic_xmit, 1028 .ndo_set_rx_mode = ibmvnic_set_multi, 1029 .ndo_set_mac_address = ibmvnic_set_mac, 1030 .ndo_validate_addr = eth_validate_addr, 1031 .ndo_tx_timeout = ibmvnic_tx_timeout, 1032 #ifdef CONFIG_NET_POLL_CONTROLLER 1033 .ndo_poll_controller = ibmvnic_netpoll_controller, 1034 #endif 1035 }; 1036 1037 /* ethtool functions */ 1038 1039 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1040 struct ethtool_link_ksettings *cmd) 1041 { 1042 u32 supported, advertising; 1043 1044 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1045 SUPPORTED_FIBRE); 1046 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1047 ADVERTISED_FIBRE); 1048 cmd->base.speed = SPEED_1000; 1049 cmd->base.duplex = DUPLEX_FULL; 1050 cmd->base.port = PORT_FIBRE; 1051 cmd->base.phy_address = 0; 1052 cmd->base.autoneg = AUTONEG_ENABLE; 1053 1054 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1055 supported); 1056 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1057 advertising); 1058 1059 return 0; 1060 } 1061 1062 static void ibmvnic_get_drvinfo(struct net_device *dev, 1063 struct ethtool_drvinfo *info) 1064 { 1065 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1066 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1067 } 1068 1069 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1070 { 1071 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1072 1073 return adapter->msg_enable; 1074 } 1075 1076 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1077 { 1078 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1079 1080 adapter->msg_enable = data; 1081 } 1082 1083 static u32 ibmvnic_get_link(struct net_device *netdev) 1084 { 1085 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1086 1087 /* Don't need to send a query because we request a logical link up at 1088 * init and then we wait for link state indications 1089 */ 1090 return adapter->logical_link_state; 1091 } 1092 1093 static void ibmvnic_get_ringparam(struct net_device *netdev, 1094 struct ethtool_ringparam *ring) 1095 { 1096 ring->rx_max_pending = 0; 1097 ring->tx_max_pending = 0; 1098 ring->rx_mini_max_pending = 0; 1099 ring->rx_jumbo_max_pending = 0; 1100 ring->rx_pending = 0; 1101 ring->tx_pending = 0; 1102 ring->rx_mini_pending = 0; 1103 ring->rx_jumbo_pending = 0; 1104 } 1105 1106 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1107 { 1108 int i; 1109 1110 if (stringset != ETH_SS_STATS) 1111 return; 1112 1113 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1114 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1115 } 1116 1117 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1118 { 1119 switch (sset) { 1120 case ETH_SS_STATS: 1121 return ARRAY_SIZE(ibmvnic_stats); 1122 default: 1123 return -EOPNOTSUPP; 1124 } 1125 } 1126 1127 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1128 struct ethtool_stats *stats, u64 *data) 1129 { 1130 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1131 union ibmvnic_crq crq; 1132 int i; 1133 1134 memset(&crq, 0, sizeof(crq)); 1135 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1136 crq.request_statistics.cmd = REQUEST_STATISTICS; 1137 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1138 crq.request_statistics.len = 1139 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1140 1141 /* Wait for data to be written */ 1142 init_completion(&adapter->stats_done); 1143 ibmvnic_send_crq(adapter, &crq); 1144 wait_for_completion(&adapter->stats_done); 1145 1146 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1147 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1148 } 1149 1150 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1151 .get_drvinfo = ibmvnic_get_drvinfo, 1152 .get_msglevel = ibmvnic_get_msglevel, 1153 .set_msglevel = ibmvnic_set_msglevel, 1154 .get_link = ibmvnic_get_link, 1155 .get_ringparam = ibmvnic_get_ringparam, 1156 .get_strings = ibmvnic_get_strings, 1157 .get_sset_count = ibmvnic_get_sset_count, 1158 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1159 .get_link_ksettings = ibmvnic_get_link_ksettings, 1160 }; 1161 1162 /* Routines for managing CRQs/sCRQs */ 1163 1164 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1165 struct ibmvnic_sub_crq_queue *scrq) 1166 { 1167 struct device *dev = &adapter->vdev->dev; 1168 long rc; 1169 1170 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1171 1172 /* Close the sub-crqs */ 1173 do { 1174 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1175 adapter->vdev->unit_address, 1176 scrq->crq_num); 1177 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1178 1179 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1180 DMA_BIDIRECTIONAL); 1181 free_pages((unsigned long)scrq->msgs, 2); 1182 kfree(scrq); 1183 } 1184 1185 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1186 *adapter) 1187 { 1188 struct device *dev = &adapter->vdev->dev; 1189 struct ibmvnic_sub_crq_queue *scrq; 1190 int rc; 1191 1192 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); 1193 if (!scrq) 1194 return NULL; 1195 1196 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); 1197 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1198 if (!scrq->msgs) { 1199 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1200 goto zero_page_failed; 1201 } 1202 1203 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1204 DMA_BIDIRECTIONAL); 1205 if (dma_mapping_error(dev, scrq->msg_token)) { 1206 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1207 goto map_failed; 1208 } 1209 1210 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1211 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1212 1213 if (rc == H_RESOURCE) 1214 rc = ibmvnic_reset_crq(adapter); 1215 1216 if (rc == H_CLOSED) { 1217 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1218 } else if (rc) { 1219 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1220 goto reg_failed; 1221 } 1222 1223 scrq->adapter = adapter; 1224 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1225 scrq->cur = 0; 1226 atomic_set(&scrq->used, 0); 1227 scrq->rx_skb_top = NULL; 1228 spin_lock_init(&scrq->lock); 1229 1230 netdev_dbg(adapter->netdev, 1231 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1232 scrq->crq_num, scrq->hw_irq, scrq->irq); 1233 1234 return scrq; 1235 1236 reg_failed: 1237 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1238 DMA_BIDIRECTIONAL); 1239 map_failed: 1240 free_pages((unsigned long)scrq->msgs, 2); 1241 zero_page_failed: 1242 kfree(scrq); 1243 1244 return NULL; 1245 } 1246 1247 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1248 { 1249 int i; 1250 1251 if (adapter->tx_scrq) { 1252 for (i = 0; i < adapter->req_tx_queues; i++) 1253 if (adapter->tx_scrq[i]) { 1254 free_irq(adapter->tx_scrq[i]->irq, 1255 adapter->tx_scrq[i]); 1256 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1257 release_sub_crq_queue(adapter, 1258 adapter->tx_scrq[i]); 1259 } 1260 adapter->tx_scrq = NULL; 1261 } 1262 1263 if (adapter->rx_scrq) { 1264 for (i = 0; i < adapter->req_rx_queues; i++) 1265 if (adapter->rx_scrq[i]) { 1266 free_irq(adapter->rx_scrq[i]->irq, 1267 adapter->rx_scrq[i]); 1268 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1269 release_sub_crq_queue(adapter, 1270 adapter->rx_scrq[i]); 1271 } 1272 adapter->rx_scrq = NULL; 1273 } 1274 } 1275 1276 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter) 1277 { 1278 int i; 1279 1280 if (adapter->tx_scrq) { 1281 for (i = 0; i < adapter->req_tx_queues; i++) 1282 if (adapter->tx_scrq[i]) 1283 release_sub_crq_queue(adapter, 1284 adapter->tx_scrq[i]); 1285 adapter->tx_scrq = NULL; 1286 } 1287 1288 if (adapter->rx_scrq) { 1289 for (i = 0; i < adapter->req_rx_queues; i++) 1290 if (adapter->rx_scrq[i]) 1291 release_sub_crq_queue(adapter, 1292 adapter->rx_scrq[i]); 1293 adapter->rx_scrq = NULL; 1294 } 1295 } 1296 1297 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1298 struct ibmvnic_sub_crq_queue *scrq) 1299 { 1300 struct device *dev = &adapter->vdev->dev; 1301 unsigned long rc; 1302 1303 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1304 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1305 if (rc) 1306 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1307 scrq->hw_irq, rc); 1308 return rc; 1309 } 1310 1311 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1312 struct ibmvnic_sub_crq_queue *scrq) 1313 { 1314 struct device *dev = &adapter->vdev->dev; 1315 unsigned long rc; 1316 1317 if (scrq->hw_irq > 0x100000000ULL) { 1318 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1319 return 1; 1320 } 1321 1322 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1323 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1324 if (rc) 1325 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1326 scrq->hw_irq, rc); 1327 return rc; 1328 } 1329 1330 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1331 struct ibmvnic_sub_crq_queue *scrq) 1332 { 1333 struct device *dev = &adapter->vdev->dev; 1334 struct ibmvnic_tx_buff *txbuff; 1335 union sub_crq *next; 1336 int index; 1337 int i, j; 1338 u8 first; 1339 1340 restart_loop: 1341 while (pending_scrq(adapter, scrq)) { 1342 unsigned int pool = scrq->pool_index; 1343 1344 next = ibmvnic_next_scrq(adapter, scrq); 1345 for (i = 0; i < next->tx_comp.num_comps; i++) { 1346 if (next->tx_comp.rcs[i]) { 1347 dev_err(dev, "tx error %x\n", 1348 next->tx_comp.rcs[i]); 1349 continue; 1350 } 1351 index = be32_to_cpu(next->tx_comp.correlators[i]); 1352 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1353 1354 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1355 if (!txbuff->data_dma[j]) 1356 continue; 1357 1358 txbuff->data_dma[j] = 0; 1359 txbuff->used_bounce = false; 1360 } 1361 /* if sub_crq was sent indirectly */ 1362 first = txbuff->indir_arr[0].generic.first; 1363 if (first == IBMVNIC_CRQ_CMD) { 1364 dma_unmap_single(dev, txbuff->indir_dma, 1365 sizeof(txbuff->indir_arr), 1366 DMA_TO_DEVICE); 1367 } 1368 1369 if (txbuff->last_frag) { 1370 atomic_dec(&scrq->used); 1371 1372 if (atomic_read(&scrq->used) <= 1373 (adapter->req_tx_entries_per_subcrq / 2) && 1374 netif_subqueue_stopped(adapter->netdev, 1375 txbuff->skb)) { 1376 netif_wake_subqueue(adapter->netdev, 1377 scrq->pool_index); 1378 netdev_dbg(adapter->netdev, 1379 "Started queue %d\n", 1380 scrq->pool_index); 1381 } 1382 1383 dev_kfree_skb_any(txbuff->skb); 1384 } 1385 1386 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1387 producer_index] = index; 1388 adapter->tx_pool[pool].producer_index = 1389 (adapter->tx_pool[pool].producer_index + 1) % 1390 adapter->req_tx_entries_per_subcrq; 1391 } 1392 /* remove tx_comp scrq*/ 1393 next->tx_comp.first = 0; 1394 } 1395 1396 enable_scrq_irq(adapter, scrq); 1397 1398 if (pending_scrq(adapter, scrq)) { 1399 disable_scrq_irq(adapter, scrq); 1400 goto restart_loop; 1401 } 1402 1403 return 0; 1404 } 1405 1406 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1407 { 1408 struct ibmvnic_sub_crq_queue *scrq = instance; 1409 struct ibmvnic_adapter *adapter = scrq->adapter; 1410 1411 disable_scrq_irq(adapter, scrq); 1412 ibmvnic_complete_tx(adapter, scrq); 1413 1414 return IRQ_HANDLED; 1415 } 1416 1417 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1418 { 1419 struct ibmvnic_sub_crq_queue *scrq = instance; 1420 struct ibmvnic_adapter *adapter = scrq->adapter; 1421 1422 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1423 disable_scrq_irq(adapter, scrq); 1424 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1425 } 1426 1427 return IRQ_HANDLED; 1428 } 1429 1430 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1431 { 1432 struct device *dev = &adapter->vdev->dev; 1433 struct ibmvnic_sub_crq_queue *scrq; 1434 int i = 0, j = 0; 1435 int rc = 0; 1436 1437 for (i = 0; i < adapter->req_tx_queues; i++) { 1438 scrq = adapter->tx_scrq[i]; 1439 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1440 1441 if (!scrq->irq) { 1442 rc = -EINVAL; 1443 dev_err(dev, "Error mapping irq\n"); 1444 goto req_tx_irq_failed; 1445 } 1446 1447 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1448 0, "ibmvnic_tx", scrq); 1449 1450 if (rc) { 1451 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1452 scrq->irq, rc); 1453 irq_dispose_mapping(scrq->irq); 1454 goto req_rx_irq_failed; 1455 } 1456 } 1457 1458 for (i = 0; i < adapter->req_rx_queues; i++) { 1459 scrq = adapter->rx_scrq[i]; 1460 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1461 if (!scrq->irq) { 1462 rc = -EINVAL; 1463 dev_err(dev, "Error mapping irq\n"); 1464 goto req_rx_irq_failed; 1465 } 1466 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1467 0, "ibmvnic_rx", scrq); 1468 if (rc) { 1469 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1470 scrq->irq, rc); 1471 irq_dispose_mapping(scrq->irq); 1472 goto req_rx_irq_failed; 1473 } 1474 } 1475 return rc; 1476 1477 req_rx_irq_failed: 1478 for (j = 0; j < i; j++) { 1479 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1480 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1481 } 1482 i = adapter->req_tx_queues; 1483 req_tx_irq_failed: 1484 for (j = 0; j < i; j++) { 1485 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1486 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1487 } 1488 release_sub_crqs_no_irqs(adapter); 1489 return rc; 1490 } 1491 1492 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) 1493 { 1494 struct device *dev = &adapter->vdev->dev; 1495 struct ibmvnic_sub_crq_queue **allqueues; 1496 int registered_queues = 0; 1497 union ibmvnic_crq crq; 1498 int total_queues; 1499 int more = 0; 1500 int i; 1501 1502 if (!retry) { 1503 /* Sub-CRQ entries are 32 byte long */ 1504 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1505 1506 if (adapter->min_tx_entries_per_subcrq > entries_page || 1507 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1508 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1509 goto allqueues_failed; 1510 } 1511 1512 /* Get the minimum between the queried max and the entries 1513 * that fit in our PAGE_SIZE 1514 */ 1515 adapter->req_tx_entries_per_subcrq = 1516 adapter->max_tx_entries_per_subcrq > entries_page ? 1517 entries_page : adapter->max_tx_entries_per_subcrq; 1518 adapter->req_rx_add_entries_per_subcrq = 1519 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1520 entries_page : adapter->max_rx_add_entries_per_subcrq; 1521 1522 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1523 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1524 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1525 1526 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 1527 } 1528 1529 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1530 1531 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); 1532 if (!allqueues) 1533 goto allqueues_failed; 1534 1535 for (i = 0; i < total_queues; i++) { 1536 allqueues[i] = init_sub_crq_queue(adapter); 1537 if (!allqueues[i]) { 1538 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1539 break; 1540 } 1541 registered_queues++; 1542 } 1543 1544 /* Make sure we were able to register the minimum number of queues */ 1545 if (registered_queues < 1546 adapter->min_tx_queues + adapter->min_rx_queues) { 1547 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1548 goto tx_failed; 1549 } 1550 1551 /* Distribute the failed allocated queues*/ 1552 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1553 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1554 switch (i % 3) { 1555 case 0: 1556 if (adapter->req_rx_queues > adapter->min_rx_queues) 1557 adapter->req_rx_queues--; 1558 else 1559 more++; 1560 break; 1561 case 1: 1562 if (adapter->req_tx_queues > adapter->min_tx_queues) 1563 adapter->req_tx_queues--; 1564 else 1565 more++; 1566 break; 1567 } 1568 } 1569 1570 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1571 sizeof(*adapter->tx_scrq), GFP_ATOMIC); 1572 if (!adapter->tx_scrq) 1573 goto tx_failed; 1574 1575 for (i = 0; i < adapter->req_tx_queues; i++) { 1576 adapter->tx_scrq[i] = allqueues[i]; 1577 adapter->tx_scrq[i]->pool_index = i; 1578 } 1579 1580 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1581 sizeof(*adapter->rx_scrq), GFP_ATOMIC); 1582 if (!adapter->rx_scrq) 1583 goto rx_failed; 1584 1585 for (i = 0; i < adapter->req_rx_queues; i++) { 1586 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1587 adapter->rx_scrq[i]->scrq_num = i; 1588 } 1589 1590 memset(&crq, 0, sizeof(crq)); 1591 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1592 crq.request_capability.cmd = REQUEST_CAPABILITY; 1593 1594 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1595 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1596 atomic_inc(&adapter->running_cap_crqs); 1597 ibmvnic_send_crq(adapter, &crq); 1598 1599 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1600 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1601 atomic_inc(&adapter->running_cap_crqs); 1602 ibmvnic_send_crq(adapter, &crq); 1603 1604 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1605 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1606 atomic_inc(&adapter->running_cap_crqs); 1607 ibmvnic_send_crq(adapter, &crq); 1608 1609 crq.request_capability.capability = 1610 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1611 crq.request_capability.number = 1612 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1613 atomic_inc(&adapter->running_cap_crqs); 1614 ibmvnic_send_crq(adapter, &crq); 1615 1616 crq.request_capability.capability = 1617 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1618 crq.request_capability.number = 1619 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1620 atomic_inc(&adapter->running_cap_crqs); 1621 ibmvnic_send_crq(adapter, &crq); 1622 1623 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1624 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1625 atomic_inc(&adapter->running_cap_crqs); 1626 ibmvnic_send_crq(adapter, &crq); 1627 1628 if (adapter->netdev->flags & IFF_PROMISC) { 1629 if (adapter->promisc_supported) { 1630 crq.request_capability.capability = 1631 cpu_to_be16(PROMISC_REQUESTED); 1632 crq.request_capability.number = cpu_to_be64(1); 1633 atomic_inc(&adapter->running_cap_crqs); 1634 ibmvnic_send_crq(adapter, &crq); 1635 } 1636 } else { 1637 crq.request_capability.capability = 1638 cpu_to_be16(PROMISC_REQUESTED); 1639 crq.request_capability.number = cpu_to_be64(0); 1640 atomic_inc(&adapter->running_cap_crqs); 1641 ibmvnic_send_crq(adapter, &crq); 1642 } 1643 1644 kfree(allqueues); 1645 1646 return; 1647 1648 rx_failed: 1649 kfree(adapter->tx_scrq); 1650 adapter->tx_scrq = NULL; 1651 tx_failed: 1652 for (i = 0; i < registered_queues; i++) 1653 release_sub_crq_queue(adapter, allqueues[i]); 1654 kfree(allqueues); 1655 allqueues_failed: 1656 ibmvnic_remove(adapter->vdev); 1657 } 1658 1659 static int pending_scrq(struct ibmvnic_adapter *adapter, 1660 struct ibmvnic_sub_crq_queue *scrq) 1661 { 1662 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1663 1664 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1665 return 1; 1666 else 1667 return 0; 1668 } 1669 1670 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1671 struct ibmvnic_sub_crq_queue *scrq) 1672 { 1673 union sub_crq *entry; 1674 unsigned long flags; 1675 1676 spin_lock_irqsave(&scrq->lock, flags); 1677 entry = &scrq->msgs[scrq->cur]; 1678 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1679 if (++scrq->cur == scrq->size) 1680 scrq->cur = 0; 1681 } else { 1682 entry = NULL; 1683 } 1684 spin_unlock_irqrestore(&scrq->lock, flags); 1685 1686 return entry; 1687 } 1688 1689 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1690 { 1691 struct ibmvnic_crq_queue *queue = &adapter->crq; 1692 union ibmvnic_crq *crq; 1693 1694 crq = &queue->msgs[queue->cur]; 1695 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1696 if (++queue->cur == queue->size) 1697 queue->cur = 0; 1698 } else { 1699 crq = NULL; 1700 } 1701 1702 return crq; 1703 } 1704 1705 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1706 union sub_crq *sub_crq) 1707 { 1708 unsigned int ua = adapter->vdev->unit_address; 1709 struct device *dev = &adapter->vdev->dev; 1710 u64 *u64_crq = (u64 *)sub_crq; 1711 int rc; 1712 1713 netdev_dbg(adapter->netdev, 1714 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1715 (unsigned long int)cpu_to_be64(remote_handle), 1716 (unsigned long int)cpu_to_be64(u64_crq[0]), 1717 (unsigned long int)cpu_to_be64(u64_crq[1]), 1718 (unsigned long int)cpu_to_be64(u64_crq[2]), 1719 (unsigned long int)cpu_to_be64(u64_crq[3])); 1720 1721 /* Make sure the hypervisor sees the complete request */ 1722 mb(); 1723 1724 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1725 cpu_to_be64(remote_handle), 1726 cpu_to_be64(u64_crq[0]), 1727 cpu_to_be64(u64_crq[1]), 1728 cpu_to_be64(u64_crq[2]), 1729 cpu_to_be64(u64_crq[3])); 1730 1731 if (rc) { 1732 if (rc == H_CLOSED) 1733 dev_warn(dev, "CRQ Queue closed\n"); 1734 dev_err(dev, "Send error (rc=%d)\n", rc); 1735 } 1736 1737 return rc; 1738 } 1739 1740 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1741 u64 remote_handle, u64 ioba, u64 num_entries) 1742 { 1743 unsigned int ua = adapter->vdev->unit_address; 1744 struct device *dev = &adapter->vdev->dev; 1745 int rc; 1746 1747 /* Make sure the hypervisor sees the complete request */ 1748 mb(); 1749 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1750 cpu_to_be64(remote_handle), 1751 ioba, num_entries); 1752 1753 if (rc) { 1754 if (rc == H_CLOSED) 1755 dev_warn(dev, "CRQ Queue closed\n"); 1756 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1757 } 1758 1759 return rc; 1760 } 1761 1762 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1763 union ibmvnic_crq *crq) 1764 { 1765 unsigned int ua = adapter->vdev->unit_address; 1766 struct device *dev = &adapter->vdev->dev; 1767 u64 *u64_crq = (u64 *)crq; 1768 int rc; 1769 1770 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1771 (unsigned long int)cpu_to_be64(u64_crq[0]), 1772 (unsigned long int)cpu_to_be64(u64_crq[1])); 1773 1774 /* Make sure the hypervisor sees the complete request */ 1775 mb(); 1776 1777 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1778 cpu_to_be64(u64_crq[0]), 1779 cpu_to_be64(u64_crq[1])); 1780 1781 if (rc) { 1782 if (rc == H_CLOSED) 1783 dev_warn(dev, "CRQ Queue closed\n"); 1784 dev_warn(dev, "Send error (rc=%d)\n", rc); 1785 } 1786 1787 return rc; 1788 } 1789 1790 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1791 { 1792 union ibmvnic_crq crq; 1793 1794 memset(&crq, 0, sizeof(crq)); 1795 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1796 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1797 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1798 1799 return ibmvnic_send_crq(adapter, &crq); 1800 } 1801 1802 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1803 { 1804 union ibmvnic_crq crq; 1805 1806 memset(&crq, 0, sizeof(crq)); 1807 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1808 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 1809 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 1810 1811 return ibmvnic_send_crq(adapter, &crq); 1812 } 1813 1814 static int send_version_xchg(struct ibmvnic_adapter *adapter) 1815 { 1816 union ibmvnic_crq crq; 1817 1818 memset(&crq, 0, sizeof(crq)); 1819 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 1820 crq.version_exchange.cmd = VERSION_EXCHANGE; 1821 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 1822 1823 return ibmvnic_send_crq(adapter, &crq); 1824 } 1825 1826 static void send_login(struct ibmvnic_adapter *adapter) 1827 { 1828 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 1829 struct ibmvnic_login_buffer *login_buffer; 1830 struct ibmvnic_inflight_cmd *inflight_cmd; 1831 struct device *dev = &adapter->vdev->dev; 1832 dma_addr_t rsp_buffer_token; 1833 dma_addr_t buffer_token; 1834 size_t rsp_buffer_size; 1835 union ibmvnic_crq crq; 1836 unsigned long flags; 1837 size_t buffer_size; 1838 __be64 *tx_list_p; 1839 __be64 *rx_list_p; 1840 int i; 1841 1842 buffer_size = 1843 sizeof(struct ibmvnic_login_buffer) + 1844 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 1845 1846 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 1847 if (!login_buffer) 1848 goto buf_alloc_failed; 1849 1850 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 1851 DMA_TO_DEVICE); 1852 if (dma_mapping_error(dev, buffer_token)) { 1853 dev_err(dev, "Couldn't map login buffer\n"); 1854 goto buf_map_failed; 1855 } 1856 1857 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 1858 sizeof(u64) * adapter->req_tx_queues + 1859 sizeof(u64) * adapter->req_rx_queues + 1860 sizeof(u64) * adapter->req_rx_queues + 1861 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 1862 1863 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 1864 if (!login_rsp_buffer) 1865 goto buf_rsp_alloc_failed; 1866 1867 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 1868 rsp_buffer_size, DMA_FROM_DEVICE); 1869 if (dma_mapping_error(dev, rsp_buffer_token)) { 1870 dev_err(dev, "Couldn't map login rsp buffer\n"); 1871 goto buf_rsp_map_failed; 1872 } 1873 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 1874 if (!inflight_cmd) { 1875 dev_err(dev, "Couldn't allocate inflight_cmd\n"); 1876 goto inflight_alloc_failed; 1877 } 1878 adapter->login_buf = login_buffer; 1879 adapter->login_buf_token = buffer_token; 1880 adapter->login_buf_sz = buffer_size; 1881 adapter->login_rsp_buf = login_rsp_buffer; 1882 adapter->login_rsp_buf_token = rsp_buffer_token; 1883 adapter->login_rsp_buf_sz = rsp_buffer_size; 1884 1885 login_buffer->len = cpu_to_be32(buffer_size); 1886 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 1887 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 1888 login_buffer->off_txcomp_subcrqs = 1889 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 1890 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 1891 login_buffer->off_rxcomp_subcrqs = 1892 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 1893 sizeof(u64) * adapter->req_tx_queues); 1894 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 1895 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 1896 1897 tx_list_p = (__be64 *)((char *)login_buffer + 1898 sizeof(struct ibmvnic_login_buffer)); 1899 rx_list_p = (__be64 *)((char *)login_buffer + 1900 sizeof(struct ibmvnic_login_buffer) + 1901 sizeof(u64) * adapter->req_tx_queues); 1902 1903 for (i = 0; i < adapter->req_tx_queues; i++) { 1904 if (adapter->tx_scrq[i]) { 1905 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 1906 crq_num); 1907 } 1908 } 1909 1910 for (i = 0; i < adapter->req_rx_queues; i++) { 1911 if (adapter->rx_scrq[i]) { 1912 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 1913 crq_num); 1914 } 1915 } 1916 1917 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 1918 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 1919 netdev_dbg(adapter->netdev, "%016lx\n", 1920 ((unsigned long int *)(adapter->login_buf))[i]); 1921 } 1922 1923 memset(&crq, 0, sizeof(crq)); 1924 crq.login.first = IBMVNIC_CRQ_CMD; 1925 crq.login.cmd = LOGIN; 1926 crq.login.ioba = cpu_to_be32(buffer_token); 1927 crq.login.len = cpu_to_be32(buffer_size); 1928 1929 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 1930 1931 spin_lock_irqsave(&adapter->inflight_lock, flags); 1932 list_add_tail(&inflight_cmd->list, &adapter->inflight); 1933 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 1934 1935 ibmvnic_send_crq(adapter, &crq); 1936 1937 return; 1938 1939 inflight_alloc_failed: 1940 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 1941 DMA_FROM_DEVICE); 1942 buf_rsp_map_failed: 1943 kfree(login_rsp_buffer); 1944 buf_rsp_alloc_failed: 1945 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 1946 buf_map_failed: 1947 kfree(login_buffer); 1948 buf_alloc_failed: 1949 return; 1950 } 1951 1952 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 1953 u32 len, u8 map_id) 1954 { 1955 union ibmvnic_crq crq; 1956 1957 memset(&crq, 0, sizeof(crq)); 1958 crq.request_map.first = IBMVNIC_CRQ_CMD; 1959 crq.request_map.cmd = REQUEST_MAP; 1960 crq.request_map.map_id = map_id; 1961 crq.request_map.ioba = cpu_to_be32(addr); 1962 crq.request_map.len = cpu_to_be32(len); 1963 ibmvnic_send_crq(adapter, &crq); 1964 } 1965 1966 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 1967 { 1968 union ibmvnic_crq crq; 1969 1970 memset(&crq, 0, sizeof(crq)); 1971 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 1972 crq.request_unmap.cmd = REQUEST_UNMAP; 1973 crq.request_unmap.map_id = map_id; 1974 ibmvnic_send_crq(adapter, &crq); 1975 } 1976 1977 static void send_map_query(struct ibmvnic_adapter *adapter) 1978 { 1979 union ibmvnic_crq crq; 1980 1981 memset(&crq, 0, sizeof(crq)); 1982 crq.query_map.first = IBMVNIC_CRQ_CMD; 1983 crq.query_map.cmd = QUERY_MAP; 1984 ibmvnic_send_crq(adapter, &crq); 1985 } 1986 1987 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 1988 static void send_cap_queries(struct ibmvnic_adapter *adapter) 1989 { 1990 union ibmvnic_crq crq; 1991 1992 atomic_set(&adapter->running_cap_crqs, 0); 1993 memset(&crq, 0, sizeof(crq)); 1994 crq.query_capability.first = IBMVNIC_CRQ_CMD; 1995 crq.query_capability.cmd = QUERY_CAPABILITY; 1996 1997 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 1998 atomic_inc(&adapter->running_cap_crqs); 1999 ibmvnic_send_crq(adapter, &crq); 2000 2001 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2002 atomic_inc(&adapter->running_cap_crqs); 2003 ibmvnic_send_crq(adapter, &crq); 2004 2005 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2006 atomic_inc(&adapter->running_cap_crqs); 2007 ibmvnic_send_crq(adapter, &crq); 2008 2009 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2010 atomic_inc(&adapter->running_cap_crqs); 2011 ibmvnic_send_crq(adapter, &crq); 2012 2013 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2014 atomic_inc(&adapter->running_cap_crqs); 2015 ibmvnic_send_crq(adapter, &crq); 2016 2017 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2018 atomic_inc(&adapter->running_cap_crqs); 2019 ibmvnic_send_crq(adapter, &crq); 2020 2021 crq.query_capability.capability = 2022 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2023 atomic_inc(&adapter->running_cap_crqs); 2024 ibmvnic_send_crq(adapter, &crq); 2025 2026 crq.query_capability.capability = 2027 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2028 atomic_inc(&adapter->running_cap_crqs); 2029 ibmvnic_send_crq(adapter, &crq); 2030 2031 crq.query_capability.capability = 2032 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2033 atomic_inc(&adapter->running_cap_crqs); 2034 ibmvnic_send_crq(adapter, &crq); 2035 2036 crq.query_capability.capability = 2037 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2038 atomic_inc(&adapter->running_cap_crqs); 2039 ibmvnic_send_crq(adapter, &crq); 2040 2041 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2042 atomic_inc(&adapter->running_cap_crqs); 2043 ibmvnic_send_crq(adapter, &crq); 2044 2045 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2046 atomic_inc(&adapter->running_cap_crqs); 2047 ibmvnic_send_crq(adapter, &crq); 2048 2049 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2050 atomic_inc(&adapter->running_cap_crqs); 2051 ibmvnic_send_crq(adapter, &crq); 2052 2053 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2054 atomic_inc(&adapter->running_cap_crqs); 2055 ibmvnic_send_crq(adapter, &crq); 2056 2057 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2058 atomic_inc(&adapter->running_cap_crqs); 2059 ibmvnic_send_crq(adapter, &crq); 2060 2061 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2062 atomic_inc(&adapter->running_cap_crqs); 2063 ibmvnic_send_crq(adapter, &crq); 2064 2065 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2066 atomic_inc(&adapter->running_cap_crqs); 2067 ibmvnic_send_crq(adapter, &crq); 2068 2069 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2070 atomic_inc(&adapter->running_cap_crqs); 2071 ibmvnic_send_crq(adapter, &crq); 2072 2073 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2074 atomic_inc(&adapter->running_cap_crqs); 2075 ibmvnic_send_crq(adapter, &crq); 2076 2077 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2078 atomic_inc(&adapter->running_cap_crqs); 2079 ibmvnic_send_crq(adapter, &crq); 2080 2081 crq.query_capability.capability = 2082 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2083 atomic_inc(&adapter->running_cap_crqs); 2084 ibmvnic_send_crq(adapter, &crq); 2085 2086 crq.query_capability.capability = 2087 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2088 atomic_inc(&adapter->running_cap_crqs); 2089 ibmvnic_send_crq(adapter, &crq); 2090 2091 crq.query_capability.capability = 2092 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2093 atomic_inc(&adapter->running_cap_crqs); 2094 ibmvnic_send_crq(adapter, &crq); 2095 2096 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2097 atomic_inc(&adapter->running_cap_crqs); 2098 ibmvnic_send_crq(adapter, &crq); 2099 } 2100 2101 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2102 { 2103 struct device *dev = &adapter->vdev->dev; 2104 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2105 union ibmvnic_crq crq; 2106 int i; 2107 2108 dma_unmap_single(dev, adapter->ip_offload_tok, 2109 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2110 2111 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2112 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2113 netdev_dbg(adapter->netdev, "%016lx\n", 2114 ((unsigned long int *)(buf))[i]); 2115 2116 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2117 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2118 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2119 buf->tcp_ipv4_chksum); 2120 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2121 buf->tcp_ipv6_chksum); 2122 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2123 buf->udp_ipv4_chksum); 2124 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2125 buf->udp_ipv6_chksum); 2126 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2127 buf->large_tx_ipv4); 2128 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2129 buf->large_tx_ipv6); 2130 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2131 buf->large_rx_ipv4); 2132 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2133 buf->large_rx_ipv6); 2134 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2135 buf->max_ipv4_header_size); 2136 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2137 buf->max_ipv6_header_size); 2138 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2139 buf->max_tcp_header_size); 2140 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2141 buf->max_udp_header_size); 2142 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2143 buf->max_large_tx_size); 2144 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2145 buf->max_large_rx_size); 2146 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2147 buf->ipv6_extension_header); 2148 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2149 buf->tcp_pseudosum_req); 2150 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2151 buf->num_ipv6_ext_headers); 2152 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2153 buf->off_ipv6_ext_headers); 2154 2155 adapter->ip_offload_ctrl_tok = 2156 dma_map_single(dev, &adapter->ip_offload_ctrl, 2157 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2158 2159 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2160 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2161 return; 2162 } 2163 2164 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2165 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2166 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2167 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2168 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2169 2170 /* large_tx/rx disabled for now, additional features needed */ 2171 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2172 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2173 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2174 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2175 2176 adapter->netdev->features = NETIF_F_GSO; 2177 2178 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2179 adapter->netdev->features |= NETIF_F_IP_CSUM; 2180 2181 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2182 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2183 2184 if ((adapter->netdev->features & 2185 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2186 adapter->netdev->features |= NETIF_F_RXCSUM; 2187 2188 memset(&crq, 0, sizeof(crq)); 2189 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2190 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2191 crq.control_ip_offload.len = 2192 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2193 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2194 ibmvnic_send_crq(adapter, &crq); 2195 } 2196 2197 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2198 struct ibmvnic_adapter *adapter) 2199 { 2200 struct device *dev = &adapter->vdev->dev; 2201 struct ibmvnic_error_buff *error_buff, *tmp; 2202 unsigned long flags; 2203 bool found = false; 2204 int i; 2205 2206 if (!crq->request_error_rsp.rc.code) { 2207 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2208 crq->request_error_rsp.rc.code); 2209 return; 2210 } 2211 2212 spin_lock_irqsave(&adapter->error_list_lock, flags); 2213 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2214 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2215 found = true; 2216 list_del(&error_buff->list); 2217 break; 2218 } 2219 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2220 2221 if (!found) { 2222 dev_err(dev, "Couldn't find error id %x\n", 2223 be32_to_cpu(crq->request_error_rsp.error_id)); 2224 return; 2225 } 2226 2227 dev_err(dev, "Detailed info for error id %x:", 2228 be32_to_cpu(crq->request_error_rsp.error_id)); 2229 2230 for (i = 0; i < error_buff->len; i++) { 2231 pr_cont("%02x", (int)error_buff->buff[i]); 2232 if (i % 8 == 7) 2233 pr_cont(" "); 2234 } 2235 pr_cont("\n"); 2236 2237 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2238 DMA_FROM_DEVICE); 2239 kfree(error_buff->buff); 2240 kfree(error_buff); 2241 } 2242 2243 static void handle_dump_size_rsp(union ibmvnic_crq *crq, 2244 struct ibmvnic_adapter *adapter) 2245 { 2246 int len = be32_to_cpu(crq->request_dump_size_rsp.len); 2247 struct ibmvnic_inflight_cmd *inflight_cmd; 2248 struct device *dev = &adapter->vdev->dev; 2249 union ibmvnic_crq newcrq; 2250 unsigned long flags; 2251 2252 /* allocate and map buffer */ 2253 adapter->dump_data = kmalloc(len, GFP_KERNEL); 2254 if (!adapter->dump_data) { 2255 complete(&adapter->fw_done); 2256 return; 2257 } 2258 2259 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, 2260 DMA_FROM_DEVICE); 2261 2262 if (dma_mapping_error(dev, adapter->dump_data_token)) { 2263 if (!firmware_has_feature(FW_FEATURE_CMO)) 2264 dev_err(dev, "Couldn't map dump data\n"); 2265 kfree(adapter->dump_data); 2266 complete(&adapter->fw_done); 2267 return; 2268 } 2269 2270 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2271 if (!inflight_cmd) { 2272 dma_unmap_single(dev, adapter->dump_data_token, len, 2273 DMA_FROM_DEVICE); 2274 kfree(adapter->dump_data); 2275 complete(&adapter->fw_done); 2276 return; 2277 } 2278 2279 memset(&newcrq, 0, sizeof(newcrq)); 2280 newcrq.request_dump.first = IBMVNIC_CRQ_CMD; 2281 newcrq.request_dump.cmd = REQUEST_DUMP; 2282 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); 2283 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); 2284 2285 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); 2286 2287 spin_lock_irqsave(&adapter->inflight_lock, flags); 2288 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2289 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2290 2291 ibmvnic_send_crq(adapter, &newcrq); 2292 } 2293 2294 static void handle_error_indication(union ibmvnic_crq *crq, 2295 struct ibmvnic_adapter *adapter) 2296 { 2297 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); 2298 struct ibmvnic_inflight_cmd *inflight_cmd; 2299 struct device *dev = &adapter->vdev->dev; 2300 struct ibmvnic_error_buff *error_buff; 2301 union ibmvnic_crq new_crq; 2302 unsigned long flags; 2303 2304 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2305 crq->error_indication. 2306 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2307 be32_to_cpu(crq->error_indication.error_id), 2308 be16_to_cpu(crq->error_indication.error_cause)); 2309 2310 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2311 if (!error_buff) 2312 return; 2313 2314 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2315 if (!error_buff->buff) { 2316 kfree(error_buff); 2317 return; 2318 } 2319 2320 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2321 DMA_FROM_DEVICE); 2322 if (dma_mapping_error(dev, error_buff->dma)) { 2323 if (!firmware_has_feature(FW_FEATURE_CMO)) 2324 dev_err(dev, "Couldn't map error buffer\n"); 2325 kfree(error_buff->buff); 2326 kfree(error_buff); 2327 return; 2328 } 2329 2330 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2331 if (!inflight_cmd) { 2332 dma_unmap_single(dev, error_buff->dma, detail_len, 2333 DMA_FROM_DEVICE); 2334 kfree(error_buff->buff); 2335 kfree(error_buff); 2336 return; 2337 } 2338 2339 error_buff->len = detail_len; 2340 error_buff->error_id = crq->error_indication.error_id; 2341 2342 spin_lock_irqsave(&adapter->error_list_lock, flags); 2343 list_add_tail(&error_buff->list, &adapter->errors); 2344 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2345 2346 memset(&new_crq, 0, sizeof(new_crq)); 2347 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2348 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2349 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2350 new_crq.request_error_info.len = cpu_to_be32(detail_len); 2351 new_crq.request_error_info.error_id = crq->error_indication.error_id; 2352 2353 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2354 2355 spin_lock_irqsave(&adapter->inflight_lock, flags); 2356 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2357 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2358 2359 ibmvnic_send_crq(adapter, &new_crq); 2360 } 2361 2362 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2363 struct ibmvnic_adapter *adapter) 2364 { 2365 struct net_device *netdev = adapter->netdev; 2366 struct device *dev = &adapter->vdev->dev; 2367 long rc; 2368 2369 rc = crq->change_mac_addr_rsp.rc.code; 2370 if (rc) { 2371 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2372 return; 2373 } 2374 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2375 ETH_ALEN); 2376 } 2377 2378 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2379 struct ibmvnic_adapter *adapter) 2380 { 2381 struct device *dev = &adapter->vdev->dev; 2382 u64 *req_value; 2383 char *name; 2384 2385 atomic_dec(&adapter->running_cap_crqs); 2386 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2387 case REQ_TX_QUEUES: 2388 req_value = &adapter->req_tx_queues; 2389 name = "tx"; 2390 break; 2391 case REQ_RX_QUEUES: 2392 req_value = &adapter->req_rx_queues; 2393 name = "rx"; 2394 break; 2395 case REQ_RX_ADD_QUEUES: 2396 req_value = &adapter->req_rx_add_queues; 2397 name = "rx_add"; 2398 break; 2399 case REQ_TX_ENTRIES_PER_SUBCRQ: 2400 req_value = &adapter->req_tx_entries_per_subcrq; 2401 name = "tx_entries_per_subcrq"; 2402 break; 2403 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2404 req_value = &adapter->req_rx_add_entries_per_subcrq; 2405 name = "rx_add_entries_per_subcrq"; 2406 break; 2407 case REQ_MTU: 2408 req_value = &adapter->req_mtu; 2409 name = "mtu"; 2410 break; 2411 case PROMISC_REQUESTED: 2412 req_value = &adapter->promisc; 2413 name = "promisc"; 2414 break; 2415 default: 2416 dev_err(dev, "Got invalid cap request rsp %d\n", 2417 crq->request_capability.capability); 2418 return; 2419 } 2420 2421 switch (crq->request_capability_rsp.rc.code) { 2422 case SUCCESS: 2423 break; 2424 case PARTIALSUCCESS: 2425 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2426 *req_value, 2427 (long int)be64_to_cpu(crq->request_capability_rsp. 2428 number), name); 2429 release_sub_crqs_no_irqs(adapter); 2430 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 2431 init_sub_crqs(adapter, 1); 2432 return; 2433 default: 2434 dev_err(dev, "Error %d in request cap rsp\n", 2435 crq->request_capability_rsp.rc.code); 2436 return; 2437 } 2438 2439 /* Done receiving requested capabilities, query IP offload support */ 2440 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2441 union ibmvnic_crq newcrq; 2442 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2443 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2444 &adapter->ip_offload_buf; 2445 2446 adapter->wait_capability = false; 2447 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2448 buf_sz, 2449 DMA_FROM_DEVICE); 2450 2451 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2452 if (!firmware_has_feature(FW_FEATURE_CMO)) 2453 dev_err(dev, "Couldn't map offload buffer\n"); 2454 return; 2455 } 2456 2457 memset(&newcrq, 0, sizeof(newcrq)); 2458 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2459 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2460 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2461 newcrq.query_ip_offload.ioba = 2462 cpu_to_be32(adapter->ip_offload_tok); 2463 2464 ibmvnic_send_crq(adapter, &newcrq); 2465 } 2466 } 2467 2468 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2469 struct ibmvnic_adapter *adapter) 2470 { 2471 struct device *dev = &adapter->vdev->dev; 2472 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2473 struct ibmvnic_login_buffer *login = adapter->login_buf; 2474 union ibmvnic_crq crq; 2475 int i; 2476 2477 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2478 DMA_BIDIRECTIONAL); 2479 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2480 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2481 2482 /* If the number of queues requested can't be allocated by the 2483 * server, the login response will return with code 1. We will need 2484 * to resend the login buffer with fewer queues requested. 2485 */ 2486 if (login_rsp_crq->generic.rc.code) { 2487 adapter->renegotiate = true; 2488 complete(&adapter->init_done); 2489 return 0; 2490 } 2491 2492 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2493 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2494 netdev_dbg(adapter->netdev, "%016lx\n", 2495 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2496 } 2497 2498 /* Sanity checks */ 2499 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2500 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2501 adapter->req_rx_add_queues != 2502 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2503 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2504 ibmvnic_remove(adapter->vdev); 2505 return -EIO; 2506 } 2507 complete(&adapter->init_done); 2508 2509 memset(&crq, 0, sizeof(crq)); 2510 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; 2511 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; 2512 ibmvnic_send_crq(adapter, &crq); 2513 2514 return 0; 2515 } 2516 2517 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2518 struct ibmvnic_adapter *adapter) 2519 { 2520 struct device *dev = &adapter->vdev->dev; 2521 u8 map_id = crq->request_map_rsp.map_id; 2522 int tx_subcrqs; 2523 int rx_subcrqs; 2524 long rc; 2525 int i; 2526 2527 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2528 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2529 2530 rc = crq->request_map_rsp.rc.code; 2531 if (rc) { 2532 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2533 adapter->map_id--; 2534 /* need to find and zero tx/rx_pool map_id */ 2535 for (i = 0; i < tx_subcrqs; i++) { 2536 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2537 adapter->tx_pool[i].long_term_buff.map_id = 0; 2538 } 2539 for (i = 0; i < rx_subcrqs; i++) { 2540 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2541 adapter->rx_pool[i].long_term_buff.map_id = 0; 2542 } 2543 } 2544 complete(&adapter->fw_done); 2545 } 2546 2547 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2548 struct ibmvnic_adapter *adapter) 2549 { 2550 struct device *dev = &adapter->vdev->dev; 2551 long rc; 2552 2553 rc = crq->request_unmap_rsp.rc.code; 2554 if (rc) 2555 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2556 } 2557 2558 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2559 struct ibmvnic_adapter *adapter) 2560 { 2561 struct net_device *netdev = adapter->netdev; 2562 struct device *dev = &adapter->vdev->dev; 2563 long rc; 2564 2565 rc = crq->query_map_rsp.rc.code; 2566 if (rc) { 2567 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2568 return; 2569 } 2570 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2571 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2572 crq->query_map_rsp.free_pages); 2573 } 2574 2575 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2576 struct ibmvnic_adapter *adapter) 2577 { 2578 struct net_device *netdev = adapter->netdev; 2579 struct device *dev = &adapter->vdev->dev; 2580 long rc; 2581 2582 atomic_dec(&adapter->running_cap_crqs); 2583 netdev_dbg(netdev, "Outstanding queries: %d\n", 2584 atomic_read(&adapter->running_cap_crqs)); 2585 rc = crq->query_capability.rc.code; 2586 if (rc) { 2587 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2588 goto out; 2589 } 2590 2591 switch (be16_to_cpu(crq->query_capability.capability)) { 2592 case MIN_TX_QUEUES: 2593 adapter->min_tx_queues = 2594 be64_to_cpu(crq->query_capability.number); 2595 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2596 adapter->min_tx_queues); 2597 break; 2598 case MIN_RX_QUEUES: 2599 adapter->min_rx_queues = 2600 be64_to_cpu(crq->query_capability.number); 2601 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2602 adapter->min_rx_queues); 2603 break; 2604 case MIN_RX_ADD_QUEUES: 2605 adapter->min_rx_add_queues = 2606 be64_to_cpu(crq->query_capability.number); 2607 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2608 adapter->min_rx_add_queues); 2609 break; 2610 case MAX_TX_QUEUES: 2611 adapter->max_tx_queues = 2612 be64_to_cpu(crq->query_capability.number); 2613 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2614 adapter->max_tx_queues); 2615 break; 2616 case MAX_RX_QUEUES: 2617 adapter->max_rx_queues = 2618 be64_to_cpu(crq->query_capability.number); 2619 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2620 adapter->max_rx_queues); 2621 break; 2622 case MAX_RX_ADD_QUEUES: 2623 adapter->max_rx_add_queues = 2624 be64_to_cpu(crq->query_capability.number); 2625 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2626 adapter->max_rx_add_queues); 2627 break; 2628 case MIN_TX_ENTRIES_PER_SUBCRQ: 2629 adapter->min_tx_entries_per_subcrq = 2630 be64_to_cpu(crq->query_capability.number); 2631 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2632 adapter->min_tx_entries_per_subcrq); 2633 break; 2634 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2635 adapter->min_rx_add_entries_per_subcrq = 2636 be64_to_cpu(crq->query_capability.number); 2637 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2638 adapter->min_rx_add_entries_per_subcrq); 2639 break; 2640 case MAX_TX_ENTRIES_PER_SUBCRQ: 2641 adapter->max_tx_entries_per_subcrq = 2642 be64_to_cpu(crq->query_capability.number); 2643 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2644 adapter->max_tx_entries_per_subcrq); 2645 break; 2646 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2647 adapter->max_rx_add_entries_per_subcrq = 2648 be64_to_cpu(crq->query_capability.number); 2649 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2650 adapter->max_rx_add_entries_per_subcrq); 2651 break; 2652 case TCP_IP_OFFLOAD: 2653 adapter->tcp_ip_offload = 2654 be64_to_cpu(crq->query_capability.number); 2655 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2656 adapter->tcp_ip_offload); 2657 break; 2658 case PROMISC_SUPPORTED: 2659 adapter->promisc_supported = 2660 be64_to_cpu(crq->query_capability.number); 2661 netdev_dbg(netdev, "promisc_supported = %lld\n", 2662 adapter->promisc_supported); 2663 break; 2664 case MIN_MTU: 2665 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2666 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2667 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2668 break; 2669 case MAX_MTU: 2670 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2671 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2672 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2673 break; 2674 case MAX_MULTICAST_FILTERS: 2675 adapter->max_multicast_filters = 2676 be64_to_cpu(crq->query_capability.number); 2677 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2678 adapter->max_multicast_filters); 2679 break; 2680 case VLAN_HEADER_INSERTION: 2681 adapter->vlan_header_insertion = 2682 be64_to_cpu(crq->query_capability.number); 2683 if (adapter->vlan_header_insertion) 2684 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2685 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2686 adapter->vlan_header_insertion); 2687 break; 2688 case MAX_TX_SG_ENTRIES: 2689 adapter->max_tx_sg_entries = 2690 be64_to_cpu(crq->query_capability.number); 2691 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2692 adapter->max_tx_sg_entries); 2693 break; 2694 case RX_SG_SUPPORTED: 2695 adapter->rx_sg_supported = 2696 be64_to_cpu(crq->query_capability.number); 2697 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2698 adapter->rx_sg_supported); 2699 break; 2700 case OPT_TX_COMP_SUB_QUEUES: 2701 adapter->opt_tx_comp_sub_queues = 2702 be64_to_cpu(crq->query_capability.number); 2703 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2704 adapter->opt_tx_comp_sub_queues); 2705 break; 2706 case OPT_RX_COMP_QUEUES: 2707 adapter->opt_rx_comp_queues = 2708 be64_to_cpu(crq->query_capability.number); 2709 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2710 adapter->opt_rx_comp_queues); 2711 break; 2712 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2713 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2714 be64_to_cpu(crq->query_capability.number); 2715 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2716 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2717 break; 2718 case OPT_TX_ENTRIES_PER_SUBCRQ: 2719 adapter->opt_tx_entries_per_subcrq = 2720 be64_to_cpu(crq->query_capability.number); 2721 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2722 adapter->opt_tx_entries_per_subcrq); 2723 break; 2724 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2725 adapter->opt_rxba_entries_per_subcrq = 2726 be64_to_cpu(crq->query_capability.number); 2727 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2728 adapter->opt_rxba_entries_per_subcrq); 2729 break; 2730 case TX_RX_DESC_REQ: 2731 adapter->tx_rx_desc_req = crq->query_capability.number; 2732 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2733 adapter->tx_rx_desc_req); 2734 break; 2735 2736 default: 2737 netdev_err(netdev, "Got invalid cap rsp %d\n", 2738 crq->query_capability.capability); 2739 } 2740 2741 out: 2742 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2743 adapter->wait_capability = false; 2744 init_sub_crqs(adapter, 0); 2745 /* We're done querying the capabilities, initialize sub-crqs */ 2746 } 2747 } 2748 2749 static void handle_control_ras_rsp(union ibmvnic_crq *crq, 2750 struct ibmvnic_adapter *adapter) 2751 { 2752 u8 correlator = crq->control_ras_rsp.correlator; 2753 struct device *dev = &adapter->vdev->dev; 2754 bool found = false; 2755 int i; 2756 2757 if (crq->control_ras_rsp.rc.code) { 2758 dev_warn(dev, "Control ras failed rc=%d\n", 2759 crq->control_ras_rsp.rc.code); 2760 return; 2761 } 2762 2763 for (i = 0; i < adapter->ras_comp_num; i++) { 2764 if (adapter->ras_comps[i].correlator == correlator) { 2765 found = true; 2766 break; 2767 } 2768 } 2769 2770 if (!found) { 2771 dev_warn(dev, "Correlator not found on control_ras_rsp\n"); 2772 return; 2773 } 2774 2775 switch (crq->control_ras_rsp.op) { 2776 case IBMVNIC_TRACE_LEVEL: 2777 adapter->ras_comps[i].trace_level = crq->control_ras.level; 2778 break; 2779 case IBMVNIC_ERROR_LEVEL: 2780 adapter->ras_comps[i].error_check_level = 2781 crq->control_ras.level; 2782 break; 2783 case IBMVNIC_TRACE_PAUSE: 2784 adapter->ras_comp_int[i].paused = 1; 2785 break; 2786 case IBMVNIC_TRACE_RESUME: 2787 adapter->ras_comp_int[i].paused = 0; 2788 break; 2789 case IBMVNIC_TRACE_ON: 2790 adapter->ras_comps[i].trace_on = 1; 2791 break; 2792 case IBMVNIC_TRACE_OFF: 2793 adapter->ras_comps[i].trace_on = 0; 2794 break; 2795 case IBMVNIC_CHG_TRACE_BUFF_SZ: 2796 /* trace_buff_sz is 3 bytes, stuff it into an int */ 2797 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; 2798 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = 2799 crq->control_ras_rsp.trace_buff_sz[0]; 2800 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = 2801 crq->control_ras_rsp.trace_buff_sz[1]; 2802 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = 2803 crq->control_ras_rsp.trace_buff_sz[2]; 2804 break; 2805 default: 2806 dev_err(dev, "invalid op %d on control_ras_rsp", 2807 crq->control_ras_rsp.op); 2808 } 2809 } 2810 2811 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, 2812 loff_t *ppos) 2813 { 2814 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2815 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2816 struct device *dev = &adapter->vdev->dev; 2817 struct ibmvnic_fw_trace_entry *trace; 2818 int num = ras_comp_int->num; 2819 union ibmvnic_crq crq; 2820 dma_addr_t trace_tok; 2821 2822 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2823 return 0; 2824 2825 trace = 2826 dma_alloc_coherent(dev, 2827 be32_to_cpu(adapter->ras_comps[num]. 2828 trace_buff_size), &trace_tok, 2829 GFP_KERNEL); 2830 if (!trace) { 2831 dev_err(dev, "Couldn't alloc trace buffer\n"); 2832 return 0; 2833 } 2834 2835 memset(&crq, 0, sizeof(crq)); 2836 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; 2837 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; 2838 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; 2839 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); 2840 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; 2841 2842 init_completion(&adapter->fw_done); 2843 ibmvnic_send_crq(adapter, &crq); 2844 wait_for_completion(&adapter->fw_done); 2845 2846 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2847 len = 2848 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - 2849 *ppos; 2850 2851 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); 2852 2853 dma_free_coherent(dev, 2854 be32_to_cpu(adapter->ras_comps[num].trace_buff_size), 2855 trace, trace_tok); 2856 *ppos += len; 2857 return len; 2858 } 2859 2860 static const struct file_operations trace_ops = { 2861 .owner = THIS_MODULE, 2862 .open = simple_open, 2863 .read = trace_read, 2864 }; 2865 2866 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, 2867 loff_t *ppos) 2868 { 2869 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2870 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2871 int num = ras_comp_int->num; 2872 char buff[5]; /* 1 or 0 plus \n and \0 */ 2873 int size; 2874 2875 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); 2876 2877 if (*ppos >= size) 2878 return 0; 2879 2880 copy_to_user(user_buf, buff, size); 2881 *ppos += size; 2882 return size; 2883 } 2884 2885 static ssize_t paused_write(struct file *file, const char __user *user_buf, 2886 size_t len, loff_t *ppos) 2887 { 2888 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2889 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2890 int num = ras_comp_int->num; 2891 union ibmvnic_crq crq; 2892 unsigned long val; 2893 char buff[9]; /* decimal max int plus \n and \0 */ 2894 2895 copy_from_user(buff, user_buf, sizeof(buff)); 2896 val = kstrtoul(buff, 10, NULL); 2897 2898 adapter->ras_comp_int[num].paused = val ? 1 : 0; 2899 2900 memset(&crq, 0, sizeof(crq)); 2901 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2902 crq.control_ras.cmd = CONTROL_RAS; 2903 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2904 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; 2905 ibmvnic_send_crq(adapter, &crq); 2906 2907 return len; 2908 } 2909 2910 static const struct file_operations paused_ops = { 2911 .owner = THIS_MODULE, 2912 .open = simple_open, 2913 .read = paused_read, 2914 .write = paused_write, 2915 }; 2916 2917 static ssize_t tracing_read(struct file *file, char __user *user_buf, 2918 size_t len, loff_t *ppos) 2919 { 2920 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2921 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2922 int num = ras_comp_int->num; 2923 char buff[5]; /* 1 or 0 plus \n and \0 */ 2924 int size; 2925 2926 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); 2927 2928 if (*ppos >= size) 2929 return 0; 2930 2931 copy_to_user(user_buf, buff, size); 2932 *ppos += size; 2933 return size; 2934 } 2935 2936 static ssize_t tracing_write(struct file *file, const char __user *user_buf, 2937 size_t len, loff_t *ppos) 2938 { 2939 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2940 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2941 int num = ras_comp_int->num; 2942 union ibmvnic_crq crq; 2943 unsigned long val; 2944 char buff[9]; /* decimal max int plus \n and \0 */ 2945 2946 copy_from_user(buff, user_buf, sizeof(buff)); 2947 val = kstrtoul(buff, 10, NULL); 2948 2949 memset(&crq, 0, sizeof(crq)); 2950 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2951 crq.control_ras.cmd = CONTROL_RAS; 2952 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2953 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; 2954 2955 return len; 2956 } 2957 2958 static const struct file_operations tracing_ops = { 2959 .owner = THIS_MODULE, 2960 .open = simple_open, 2961 .read = tracing_read, 2962 .write = tracing_write, 2963 }; 2964 2965 static ssize_t error_level_read(struct file *file, char __user *user_buf, 2966 size_t len, loff_t *ppos) 2967 { 2968 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2969 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2970 int num = ras_comp_int->num; 2971 char buff[5]; /* decimal max char plus \n and \0 */ 2972 int size; 2973 2974 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); 2975 2976 if (*ppos >= size) 2977 return 0; 2978 2979 copy_to_user(user_buf, buff, size); 2980 *ppos += size; 2981 return size; 2982 } 2983 2984 static ssize_t error_level_write(struct file *file, const char __user *user_buf, 2985 size_t len, loff_t *ppos) 2986 { 2987 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2988 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2989 int num = ras_comp_int->num; 2990 union ibmvnic_crq crq; 2991 unsigned long val; 2992 char buff[9]; /* decimal max int plus \n and \0 */ 2993 2994 copy_from_user(buff, user_buf, sizeof(buff)); 2995 val = kstrtoul(buff, 10, NULL); 2996 2997 if (val > 9) 2998 val = 9; 2999 3000 memset(&crq, 0, sizeof(crq)); 3001 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3002 crq.control_ras.cmd = CONTROL_RAS; 3003 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 3004 crq.control_ras.op = IBMVNIC_ERROR_LEVEL; 3005 crq.control_ras.level = val; 3006 ibmvnic_send_crq(adapter, &crq); 3007 3008 return len; 3009 } 3010 3011 static const struct file_operations error_level_ops = { 3012 .owner = THIS_MODULE, 3013 .open = simple_open, 3014 .read = error_level_read, 3015 .write = error_level_write, 3016 }; 3017 3018 static ssize_t trace_level_read(struct file *file, char __user *user_buf, 3019 size_t len, loff_t *ppos) 3020 { 3021 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3022 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3023 int num = ras_comp_int->num; 3024 char buff[5]; /* decimal max char plus \n and \0 */ 3025 int size; 3026 3027 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); 3028 if (*ppos >= size) 3029 return 0; 3030 3031 copy_to_user(user_buf, buff, size); 3032 *ppos += size; 3033 return size; 3034 } 3035 3036 static ssize_t trace_level_write(struct file *file, const char __user *user_buf, 3037 size_t len, loff_t *ppos) 3038 { 3039 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3040 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3041 union ibmvnic_crq crq; 3042 unsigned long val; 3043 char buff[9]; /* decimal max int plus \n and \0 */ 3044 3045 copy_from_user(buff, user_buf, sizeof(buff)); 3046 val = kstrtoul(buff, 10, NULL); 3047 if (val > 9) 3048 val = 9; 3049 3050 memset(&crq, 0, sizeof(crq)); 3051 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3052 crq.control_ras.cmd = CONTROL_RAS; 3053 crq.control_ras.correlator = 3054 adapter->ras_comps[ras_comp_int->num].correlator; 3055 crq.control_ras.op = IBMVNIC_TRACE_LEVEL; 3056 crq.control_ras.level = val; 3057 ibmvnic_send_crq(adapter, &crq); 3058 3059 return len; 3060 } 3061 3062 static const struct file_operations trace_level_ops = { 3063 .owner = THIS_MODULE, 3064 .open = simple_open, 3065 .read = trace_level_read, 3066 .write = trace_level_write, 3067 }; 3068 3069 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, 3070 size_t len, loff_t *ppos) 3071 { 3072 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3073 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3074 int num = ras_comp_int->num; 3075 char buff[9]; /* decimal max int plus \n and \0 */ 3076 int size; 3077 3078 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); 3079 if (*ppos >= size) 3080 return 0; 3081 3082 copy_to_user(user_buf, buff, size); 3083 *ppos += size; 3084 return size; 3085 } 3086 3087 static ssize_t trace_buff_size_write(struct file *file, 3088 const char __user *user_buf, size_t len, 3089 loff_t *ppos) 3090 { 3091 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3092 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3093 union ibmvnic_crq crq; 3094 unsigned long val; 3095 char buff[9]; /* decimal max int plus \n and \0 */ 3096 3097 copy_from_user(buff, user_buf, sizeof(buff)); 3098 val = kstrtoul(buff, 10, NULL); 3099 3100 memset(&crq, 0, sizeof(crq)); 3101 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3102 crq.control_ras.cmd = CONTROL_RAS; 3103 crq.control_ras.correlator = 3104 adapter->ras_comps[ras_comp_int->num].correlator; 3105 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; 3106 /* trace_buff_sz is 3 bytes, stuff an int into it */ 3107 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; 3108 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; 3109 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; 3110 ibmvnic_send_crq(adapter, &crq); 3111 3112 return len; 3113 } 3114 3115 static const struct file_operations trace_size_ops = { 3116 .owner = THIS_MODULE, 3117 .open = simple_open, 3118 .read = trace_buff_size_read, 3119 .write = trace_buff_size_write, 3120 }; 3121 3122 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, 3123 struct ibmvnic_adapter *adapter) 3124 { 3125 struct device *dev = &adapter->vdev->dev; 3126 struct dentry *dir_ent; 3127 struct dentry *ent; 3128 int i; 3129 3130 debugfs_remove_recursive(adapter->ras_comps_ent); 3131 3132 adapter->ras_comps_ent = debugfs_create_dir("ras_comps", 3133 adapter->debugfs_dir); 3134 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { 3135 dev_info(dev, "debugfs create ras_comps dir failed\n"); 3136 return; 3137 } 3138 3139 for (i = 0; i < adapter->ras_comp_num; i++) { 3140 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, 3141 adapter->ras_comps_ent); 3142 if (!dir_ent || IS_ERR(dir_ent)) { 3143 dev_info(dev, "debugfs create %s dir failed\n", 3144 adapter->ras_comps[i].name); 3145 continue; 3146 } 3147 3148 adapter->ras_comp_int[i].adapter = adapter; 3149 adapter->ras_comp_int[i].num = i; 3150 adapter->ras_comp_int[i].desc_blob.data = 3151 &adapter->ras_comps[i].description; 3152 adapter->ras_comp_int[i].desc_blob.size = 3153 sizeof(adapter->ras_comps[i].description); 3154 3155 /* Don't need to remember the dentry's because the debugfs dir 3156 * gets removed recursively 3157 */ 3158 ent = debugfs_create_blob("description", S_IRUGO, dir_ent, 3159 &adapter->ras_comp_int[i].desc_blob); 3160 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, 3161 dir_ent, &adapter->ras_comp_int[i], 3162 &trace_size_ops); 3163 ent = debugfs_create_file("trace_level", 3164 S_IRUGO | 3165 (adapter->ras_comps[i].trace_level != 3166 0xFF ? S_IWUSR : 0), 3167 dir_ent, &adapter->ras_comp_int[i], 3168 &trace_level_ops); 3169 ent = debugfs_create_file("error_level", 3170 S_IRUGO | 3171 (adapter-> 3172 ras_comps[i].error_check_level != 3173 0xFF ? S_IWUSR : 0), 3174 dir_ent, &adapter->ras_comp_int[i], 3175 &trace_level_ops); 3176 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, 3177 dir_ent, &adapter->ras_comp_int[i], 3178 &tracing_ops); 3179 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, 3180 dir_ent, &adapter->ras_comp_int[i], 3181 &paused_ops); 3182 ent = debugfs_create_file("trace", S_IRUGO, dir_ent, 3183 &adapter->ras_comp_int[i], 3184 &trace_ops); 3185 } 3186 } 3187 3188 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, 3189 struct ibmvnic_adapter *adapter) 3190 { 3191 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); 3192 struct device *dev = &adapter->vdev->dev; 3193 union ibmvnic_crq newcrq; 3194 3195 adapter->ras_comps = dma_alloc_coherent(dev, len, 3196 &adapter->ras_comps_tok, 3197 GFP_KERNEL); 3198 if (!adapter->ras_comps) { 3199 if (!firmware_has_feature(FW_FEATURE_CMO)) 3200 dev_err(dev, "Couldn't alloc fw comps buffer\n"); 3201 return; 3202 } 3203 3204 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * 3205 sizeof(struct ibmvnic_fw_comp_internal), 3206 GFP_KERNEL); 3207 if (!adapter->ras_comp_int) 3208 dma_free_coherent(dev, len, adapter->ras_comps, 3209 adapter->ras_comps_tok); 3210 3211 memset(&newcrq, 0, sizeof(newcrq)); 3212 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; 3213 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; 3214 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); 3215 newcrq.request_ras_comps.len = cpu_to_be32(len); 3216 ibmvnic_send_crq(adapter, &newcrq); 3217 } 3218 3219 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) 3220 { 3221 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; 3222 struct device *dev = &adapter->vdev->dev; 3223 struct ibmvnic_error_buff *error_buff, *tmp2; 3224 unsigned long flags; 3225 unsigned long flags2; 3226 3227 spin_lock_irqsave(&adapter->inflight_lock, flags); 3228 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { 3229 switch (inflight_cmd->crq.generic.cmd) { 3230 case LOGIN: 3231 dma_unmap_single(dev, adapter->login_buf_token, 3232 adapter->login_buf_sz, 3233 DMA_BIDIRECTIONAL); 3234 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3235 adapter->login_rsp_buf_sz, 3236 DMA_BIDIRECTIONAL); 3237 kfree(adapter->login_rsp_buf); 3238 kfree(adapter->login_buf); 3239 break; 3240 case REQUEST_DUMP: 3241 complete(&adapter->fw_done); 3242 break; 3243 case REQUEST_ERROR_INFO: 3244 spin_lock_irqsave(&adapter->error_list_lock, flags2); 3245 list_for_each_entry_safe(error_buff, tmp2, 3246 &adapter->errors, list) { 3247 dma_unmap_single(dev, error_buff->dma, 3248 error_buff->len, 3249 DMA_FROM_DEVICE); 3250 kfree(error_buff->buff); 3251 list_del(&error_buff->list); 3252 kfree(error_buff); 3253 } 3254 spin_unlock_irqrestore(&adapter->error_list_lock, 3255 flags2); 3256 break; 3257 } 3258 list_del(&inflight_cmd->list); 3259 kfree(inflight_cmd); 3260 } 3261 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 3262 } 3263 3264 static void ibmvnic_xport_event(struct work_struct *work) 3265 { 3266 struct ibmvnic_adapter *adapter = container_of(work, 3267 struct ibmvnic_adapter, 3268 ibmvnic_xport); 3269 struct device *dev = &adapter->vdev->dev; 3270 long rc; 3271 3272 ibmvnic_free_inflight(adapter); 3273 release_sub_crqs(adapter); 3274 if (adapter->migrated) { 3275 rc = ibmvnic_reenable_crq_queue(adapter); 3276 if (rc) 3277 dev_err(dev, "Error after enable rc=%ld\n", rc); 3278 adapter->migrated = false; 3279 rc = ibmvnic_send_crq_init(adapter); 3280 if (rc) 3281 dev_err(dev, "Error sending init rc=%ld\n", rc); 3282 } 3283 } 3284 3285 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3286 struct ibmvnic_adapter *adapter) 3287 { 3288 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3289 struct net_device *netdev = adapter->netdev; 3290 struct device *dev = &adapter->vdev->dev; 3291 long rc; 3292 3293 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3294 ((unsigned long int *)crq)[0], 3295 ((unsigned long int *)crq)[1]); 3296 switch (gen_crq->first) { 3297 case IBMVNIC_CRQ_INIT_RSP: 3298 switch (gen_crq->cmd) { 3299 case IBMVNIC_CRQ_INIT: 3300 dev_info(dev, "Partner initialized\n"); 3301 /* Send back a response */ 3302 rc = ibmvnic_send_crq_init_complete(adapter); 3303 if (!rc) 3304 schedule_work(&adapter->vnic_crq_init); 3305 else 3306 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 3307 break; 3308 case IBMVNIC_CRQ_INIT_COMPLETE: 3309 dev_info(dev, "Partner initialization complete\n"); 3310 send_version_xchg(adapter); 3311 break; 3312 default: 3313 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3314 } 3315 return; 3316 case IBMVNIC_CRQ_XPORT_EVENT: 3317 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3318 dev_info(dev, "Re-enabling adapter\n"); 3319 adapter->migrated = true; 3320 schedule_work(&adapter->ibmvnic_xport); 3321 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3322 dev_info(dev, "Backing device failover detected\n"); 3323 netif_carrier_off(netdev); 3324 adapter->failover = true; 3325 } else { 3326 /* The adapter lost the connection */ 3327 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3328 gen_crq->cmd); 3329 schedule_work(&adapter->ibmvnic_xport); 3330 } 3331 return; 3332 case IBMVNIC_CRQ_CMD_RSP: 3333 break; 3334 default: 3335 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3336 gen_crq->first); 3337 return; 3338 } 3339 3340 switch (gen_crq->cmd) { 3341 case VERSION_EXCHANGE_RSP: 3342 rc = crq->version_exchange_rsp.rc.code; 3343 if (rc) { 3344 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3345 break; 3346 } 3347 dev_info(dev, "Partner protocol version is %d\n", 3348 crq->version_exchange_rsp.version); 3349 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3350 ibmvnic_version) 3351 ibmvnic_version = 3352 be16_to_cpu(crq->version_exchange_rsp.version); 3353 send_cap_queries(adapter); 3354 break; 3355 case QUERY_CAPABILITY_RSP: 3356 handle_query_cap_rsp(crq, adapter); 3357 break; 3358 case QUERY_MAP_RSP: 3359 handle_query_map_rsp(crq, adapter); 3360 break; 3361 case REQUEST_MAP_RSP: 3362 handle_request_map_rsp(crq, adapter); 3363 break; 3364 case REQUEST_UNMAP_RSP: 3365 handle_request_unmap_rsp(crq, adapter); 3366 break; 3367 case REQUEST_CAPABILITY_RSP: 3368 handle_request_cap_rsp(crq, adapter); 3369 break; 3370 case LOGIN_RSP: 3371 netdev_dbg(netdev, "Got Login Response\n"); 3372 handle_login_rsp(crq, adapter); 3373 break; 3374 case LOGICAL_LINK_STATE_RSP: 3375 netdev_dbg(netdev, "Got Logical Link State Response\n"); 3376 adapter->logical_link_state = 3377 crq->logical_link_state_rsp.link_state; 3378 break; 3379 case LINK_STATE_INDICATION: 3380 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3381 adapter->phys_link_state = 3382 crq->link_state_indication.phys_link_state; 3383 adapter->logical_link_state = 3384 crq->link_state_indication.logical_link_state; 3385 break; 3386 case CHANGE_MAC_ADDR_RSP: 3387 netdev_dbg(netdev, "Got MAC address change Response\n"); 3388 handle_change_mac_rsp(crq, adapter); 3389 break; 3390 case ERROR_INDICATION: 3391 netdev_dbg(netdev, "Got Error Indication\n"); 3392 handle_error_indication(crq, adapter); 3393 break; 3394 case REQUEST_ERROR_RSP: 3395 netdev_dbg(netdev, "Got Error Detail Response\n"); 3396 handle_error_info_rsp(crq, adapter); 3397 break; 3398 case REQUEST_STATISTICS_RSP: 3399 netdev_dbg(netdev, "Got Statistics Response\n"); 3400 complete(&adapter->stats_done); 3401 break; 3402 case REQUEST_DUMP_SIZE_RSP: 3403 netdev_dbg(netdev, "Got Request Dump Size Response\n"); 3404 handle_dump_size_rsp(crq, adapter); 3405 break; 3406 case REQUEST_DUMP_RSP: 3407 netdev_dbg(netdev, "Got Request Dump Response\n"); 3408 complete(&adapter->fw_done); 3409 break; 3410 case QUERY_IP_OFFLOAD_RSP: 3411 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3412 handle_query_ip_offload_rsp(adapter); 3413 break; 3414 case MULTICAST_CTRL_RSP: 3415 netdev_dbg(netdev, "Got multicast control Response\n"); 3416 break; 3417 case CONTROL_IP_OFFLOAD_RSP: 3418 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3419 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3420 sizeof(adapter->ip_offload_ctrl), 3421 DMA_TO_DEVICE); 3422 /* We're done with the queries, perform the login */ 3423 send_login(adapter); 3424 break; 3425 case REQUEST_RAS_COMP_NUM_RSP: 3426 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); 3427 if (crq->request_ras_comp_num_rsp.rc.code == 10) { 3428 netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); 3429 break; 3430 } 3431 adapter->ras_comp_num = 3432 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); 3433 handle_request_ras_comp_num_rsp(crq, adapter); 3434 break; 3435 case REQUEST_RAS_COMPS_RSP: 3436 netdev_dbg(netdev, "Got Request RAS Comps Response\n"); 3437 handle_request_ras_comps_rsp(crq, adapter); 3438 break; 3439 case CONTROL_RAS_RSP: 3440 netdev_dbg(netdev, "Got Control RAS Response\n"); 3441 handle_control_ras_rsp(crq, adapter); 3442 break; 3443 case COLLECT_FW_TRACE_RSP: 3444 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3445 complete(&adapter->fw_done); 3446 break; 3447 default: 3448 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3449 gen_crq->cmd); 3450 } 3451 } 3452 3453 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3454 { 3455 struct ibmvnic_adapter *adapter = instance; 3456 unsigned long flags; 3457 3458 spin_lock_irqsave(&adapter->crq.lock, flags); 3459 vio_disable_interrupts(adapter->vdev); 3460 tasklet_schedule(&adapter->tasklet); 3461 spin_unlock_irqrestore(&adapter->crq.lock, flags); 3462 return IRQ_HANDLED; 3463 } 3464 3465 static void ibmvnic_tasklet(void *data) 3466 { 3467 struct ibmvnic_adapter *adapter = data; 3468 struct ibmvnic_crq_queue *queue = &adapter->crq; 3469 struct vio_dev *vdev = adapter->vdev; 3470 union ibmvnic_crq *crq; 3471 unsigned long flags; 3472 bool done = false; 3473 3474 spin_lock_irqsave(&queue->lock, flags); 3475 vio_disable_interrupts(vdev); 3476 while (!done) { 3477 /* Pull all the valid messages off the CRQ */ 3478 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3479 ibmvnic_handle_crq(crq, adapter); 3480 crq->generic.first = 0; 3481 } 3482 vio_enable_interrupts(vdev); 3483 crq = ibmvnic_next_crq(adapter); 3484 if (crq) { 3485 vio_disable_interrupts(vdev); 3486 ibmvnic_handle_crq(crq, adapter); 3487 crq->generic.first = 0; 3488 } else { 3489 /* remain in tasklet until all 3490 * capabilities responses are received 3491 */ 3492 if (!adapter->wait_capability) 3493 done = true; 3494 } 3495 } 3496 /* if capabilities CRQ's were sent in this tasklet, the following 3497 * tasklet must wait until all responses are received 3498 */ 3499 if (atomic_read(&adapter->running_cap_crqs) != 0) 3500 adapter->wait_capability = true; 3501 spin_unlock_irqrestore(&queue->lock, flags); 3502 } 3503 3504 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3505 { 3506 struct vio_dev *vdev = adapter->vdev; 3507 int rc; 3508 3509 do { 3510 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3511 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3512 3513 if (rc) 3514 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3515 3516 return rc; 3517 } 3518 3519 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3520 { 3521 struct ibmvnic_crq_queue *crq = &adapter->crq; 3522 struct device *dev = &adapter->vdev->dev; 3523 struct vio_dev *vdev = adapter->vdev; 3524 int rc; 3525 3526 /* Close the CRQ */ 3527 do { 3528 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3529 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3530 3531 /* Clean out the queue */ 3532 memset(crq->msgs, 0, PAGE_SIZE); 3533 crq->cur = 0; 3534 3535 /* And re-open it again */ 3536 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3537 crq->msg_token, PAGE_SIZE); 3538 3539 if (rc == H_CLOSED) 3540 /* Adapter is good, but other end is not ready */ 3541 dev_warn(dev, "Partner adapter not ready\n"); 3542 else if (rc != 0) 3543 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3544 3545 return rc; 3546 } 3547 3548 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) 3549 { 3550 struct ibmvnic_crq_queue *crq = &adapter->crq; 3551 struct vio_dev *vdev = adapter->vdev; 3552 long rc; 3553 3554 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3555 free_irq(vdev->irq, adapter); 3556 tasklet_kill(&adapter->tasklet); 3557 do { 3558 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3559 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3560 3561 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3562 DMA_BIDIRECTIONAL); 3563 free_page((unsigned long)crq->msgs); 3564 } 3565 3566 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) 3567 { 3568 struct ibmvnic_crq_queue *crq = &adapter->crq; 3569 struct device *dev = &adapter->vdev->dev; 3570 struct vio_dev *vdev = adapter->vdev; 3571 int rc, retrc = -ENOMEM; 3572 3573 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3574 /* Should we allocate more than one page? */ 3575 3576 if (!crq->msgs) 3577 return -ENOMEM; 3578 3579 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3580 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3581 DMA_BIDIRECTIONAL); 3582 if (dma_mapping_error(dev, crq->msg_token)) 3583 goto map_failed; 3584 3585 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3586 crq->msg_token, PAGE_SIZE); 3587 3588 if (rc == H_RESOURCE) 3589 /* maybe kexecing and resource is busy. try a reset */ 3590 rc = ibmvnic_reset_crq(adapter); 3591 retrc = rc; 3592 3593 if (rc == H_CLOSED) { 3594 dev_warn(dev, "Partner adapter not ready\n"); 3595 } else if (rc) { 3596 dev_warn(dev, "Error %d opening adapter\n", rc); 3597 goto reg_crq_failed; 3598 } 3599 3600 retrc = 0; 3601 3602 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3603 (unsigned long)adapter); 3604 3605 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3606 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3607 adapter); 3608 if (rc) { 3609 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3610 vdev->irq, rc); 3611 goto req_irq_failed; 3612 } 3613 3614 rc = vio_enable_interrupts(vdev); 3615 if (rc) { 3616 dev_err(dev, "Error %d enabling interrupts\n", rc); 3617 goto req_irq_failed; 3618 } 3619 3620 crq->cur = 0; 3621 spin_lock_init(&crq->lock); 3622 3623 return retrc; 3624 3625 req_irq_failed: 3626 tasklet_kill(&adapter->tasklet); 3627 do { 3628 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3629 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3630 reg_crq_failed: 3631 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3632 map_failed: 3633 free_page((unsigned long)crq->msgs); 3634 return retrc; 3635 } 3636 3637 /* debugfs for dump */ 3638 static int ibmvnic_dump_show(struct seq_file *seq, void *v) 3639 { 3640 struct net_device *netdev = seq->private; 3641 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3642 struct device *dev = &adapter->vdev->dev; 3643 union ibmvnic_crq crq; 3644 3645 memset(&crq, 0, sizeof(crq)); 3646 crq.request_dump_size.first = IBMVNIC_CRQ_CMD; 3647 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; 3648 3649 init_completion(&adapter->fw_done); 3650 ibmvnic_send_crq(adapter, &crq); 3651 wait_for_completion(&adapter->fw_done); 3652 3653 seq_write(seq, adapter->dump_data, adapter->dump_data_size); 3654 3655 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, 3656 DMA_BIDIRECTIONAL); 3657 3658 kfree(adapter->dump_data); 3659 3660 return 0; 3661 } 3662 3663 static int ibmvnic_dump_open(struct inode *inode, struct file *file) 3664 { 3665 return single_open(file, ibmvnic_dump_show, inode->i_private); 3666 } 3667 3668 static const struct file_operations ibmvnic_dump_ops = { 3669 .owner = THIS_MODULE, 3670 .open = ibmvnic_dump_open, 3671 .read = seq_read, 3672 .llseek = seq_lseek, 3673 .release = single_release, 3674 }; 3675 3676 static void handle_crq_init_rsp(struct work_struct *work) 3677 { 3678 struct ibmvnic_adapter *adapter = container_of(work, 3679 struct ibmvnic_adapter, 3680 vnic_crq_init); 3681 struct device *dev = &adapter->vdev->dev; 3682 struct net_device *netdev = adapter->netdev; 3683 unsigned long timeout = msecs_to_jiffies(30000); 3684 bool restart = false; 3685 int rc; 3686 3687 if (adapter->failover) { 3688 release_sub_crqs(adapter); 3689 if (netif_running(netdev)) { 3690 netif_tx_disable(netdev); 3691 ibmvnic_close(netdev); 3692 restart = true; 3693 } 3694 } 3695 3696 reinit_completion(&adapter->init_done); 3697 send_version_xchg(adapter); 3698 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3699 dev_err(dev, "Passive init timeout\n"); 3700 goto task_failed; 3701 } 3702 3703 do { 3704 if (adapter->renegotiate) { 3705 adapter->renegotiate = false; 3706 release_sub_crqs_no_irqs(adapter); 3707 3708 reinit_completion(&adapter->init_done); 3709 send_cap_queries(adapter); 3710 if (!wait_for_completion_timeout(&adapter->init_done, 3711 timeout)) { 3712 dev_err(dev, "Passive init timeout\n"); 3713 goto task_failed; 3714 } 3715 } 3716 } while (adapter->renegotiate); 3717 rc = init_sub_crq_irqs(adapter); 3718 3719 if (rc) 3720 goto task_failed; 3721 3722 netdev->real_num_tx_queues = adapter->req_tx_queues; 3723 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3724 3725 if (adapter->failover) { 3726 adapter->failover = false; 3727 if (restart) { 3728 rc = ibmvnic_open(netdev); 3729 if (rc) 3730 goto restart_failed; 3731 } 3732 netif_carrier_on(netdev); 3733 return; 3734 } 3735 3736 rc = register_netdev(netdev); 3737 if (rc) { 3738 dev_err(dev, 3739 "failed to register netdev rc=%d\n", rc); 3740 goto register_failed; 3741 } 3742 dev_info(dev, "ibmvnic registered\n"); 3743 3744 return; 3745 3746 restart_failed: 3747 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3748 register_failed: 3749 release_sub_crqs(adapter); 3750 task_failed: 3751 dev_err(dev, "Passive initialization was not successful\n"); 3752 } 3753 3754 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3755 { 3756 unsigned long timeout = msecs_to_jiffies(30000); 3757 struct ibmvnic_adapter *adapter; 3758 struct net_device *netdev; 3759 unsigned char *mac_addr_p; 3760 struct dentry *ent; 3761 char buf[17]; /* debugfs name buf */ 3762 int rc; 3763 3764 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3765 dev->unit_address); 3766 3767 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3768 VETH_MAC_ADDR, NULL); 3769 if (!mac_addr_p) { 3770 dev_err(&dev->dev, 3771 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3772 __FILE__, __LINE__); 3773 return 0; 3774 } 3775 3776 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3777 IBMVNIC_MAX_TX_QUEUES); 3778 if (!netdev) 3779 return -ENOMEM; 3780 3781 adapter = netdev_priv(netdev); 3782 dev_set_drvdata(&dev->dev, netdev); 3783 adapter->vdev = dev; 3784 adapter->netdev = netdev; 3785 adapter->failover = false; 3786 3787 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3788 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3789 netdev->irq = dev->irq; 3790 netdev->netdev_ops = &ibmvnic_netdev_ops; 3791 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3792 SET_NETDEV_DEV(netdev, &dev->dev); 3793 3794 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3795 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3796 3797 spin_lock_init(&adapter->stats_lock); 3798 3799 rc = ibmvnic_init_crq_queue(adapter); 3800 if (rc) { 3801 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); 3802 goto free_netdev; 3803 } 3804 3805 INIT_LIST_HEAD(&adapter->errors); 3806 INIT_LIST_HEAD(&adapter->inflight); 3807 spin_lock_init(&adapter->error_list_lock); 3808 spin_lock_init(&adapter->inflight_lock); 3809 3810 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, 3811 sizeof(struct ibmvnic_statistics), 3812 DMA_FROM_DEVICE); 3813 if (dma_mapping_error(&dev->dev, adapter->stats_token)) { 3814 if (!firmware_has_feature(FW_FEATURE_CMO)) 3815 dev_err(&dev->dev, "Couldn't map stats buffer\n"); 3816 rc = -ENOMEM; 3817 goto free_crq; 3818 } 3819 3820 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); 3821 ent = debugfs_create_dir(buf, NULL); 3822 if (!ent || IS_ERR(ent)) { 3823 dev_info(&dev->dev, "debugfs create directory failed\n"); 3824 adapter->debugfs_dir = NULL; 3825 } else { 3826 adapter->debugfs_dir = ent; 3827 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, 3828 netdev, &ibmvnic_dump_ops); 3829 if (!ent || IS_ERR(ent)) { 3830 dev_info(&dev->dev, 3831 "debugfs create dump file failed\n"); 3832 adapter->debugfs_dump = NULL; 3833 } else { 3834 adapter->debugfs_dump = ent; 3835 } 3836 } 3837 3838 init_completion(&adapter->init_done); 3839 ibmvnic_send_crq_init(adapter); 3840 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) 3841 return 0; 3842 3843 do { 3844 if (adapter->renegotiate) { 3845 adapter->renegotiate = false; 3846 release_sub_crqs_no_irqs(adapter); 3847 3848 reinit_completion(&adapter->init_done); 3849 send_cap_queries(adapter); 3850 if (!wait_for_completion_timeout(&adapter->init_done, 3851 timeout)) 3852 return 0; 3853 } 3854 } while (adapter->renegotiate); 3855 3856 rc = init_sub_crq_irqs(adapter); 3857 if (rc) { 3858 dev_err(&dev->dev, "failed to initialize sub crq irqs\n"); 3859 goto free_debugfs; 3860 } 3861 3862 netdev->real_num_tx_queues = adapter->req_tx_queues; 3863 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3864 3865 rc = register_netdev(netdev); 3866 if (rc) { 3867 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3868 goto free_sub_crqs; 3869 } 3870 dev_info(&dev->dev, "ibmvnic registered\n"); 3871 3872 return 0; 3873 3874 free_sub_crqs: 3875 release_sub_crqs(adapter); 3876 free_debugfs: 3877 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3878 debugfs_remove_recursive(adapter->debugfs_dir); 3879 free_crq: 3880 ibmvnic_release_crq_queue(adapter); 3881 free_netdev: 3882 free_netdev(netdev); 3883 return rc; 3884 } 3885 3886 static int ibmvnic_remove(struct vio_dev *dev) 3887 { 3888 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3889 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3890 3891 unregister_netdev(netdev); 3892 3893 release_sub_crqs(adapter); 3894 3895 ibmvnic_release_crq_queue(adapter); 3896 3897 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3898 debugfs_remove_recursive(adapter->debugfs_dir); 3899 3900 dma_unmap_single(&dev->dev, adapter->stats_token, 3901 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); 3902 3903 if (adapter->ras_comps) 3904 dma_free_coherent(&dev->dev, 3905 adapter->ras_comp_num * 3906 sizeof(struct ibmvnic_fw_component), 3907 adapter->ras_comps, adapter->ras_comps_tok); 3908 3909 kfree(adapter->ras_comp_int); 3910 3911 free_netdev(netdev); 3912 dev_set_drvdata(&dev->dev, NULL); 3913 3914 return 0; 3915 } 3916 3917 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3918 { 3919 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3920 struct ibmvnic_adapter *adapter; 3921 struct iommu_table *tbl; 3922 unsigned long ret = 0; 3923 int i; 3924 3925 tbl = get_iommu_table_base(&vdev->dev); 3926 3927 /* netdev inits at probe time along with the structures we need below*/ 3928 if (!netdev) 3929 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3930 3931 adapter = netdev_priv(netdev); 3932 3933 ret += PAGE_SIZE; /* the crq message queue */ 3934 ret += adapter->bounce_buffer_size; 3935 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3936 3937 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3938 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3939 3940 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3941 i++) 3942 ret += adapter->rx_pool[i].size * 3943 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3944 3945 return ret; 3946 } 3947 3948 static int ibmvnic_resume(struct device *dev) 3949 { 3950 struct net_device *netdev = dev_get_drvdata(dev); 3951 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3952 int i; 3953 3954 /* kick the interrupt handlers just in case we lost an interrupt */ 3955 for (i = 0; i < adapter->req_rx_queues; i++) 3956 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3957 adapter->rx_scrq[i]); 3958 3959 return 0; 3960 } 3961 3962 static struct vio_device_id ibmvnic_device_table[] = { 3963 {"network", "IBM,vnic"}, 3964 {"", "" } 3965 }; 3966 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3967 3968 static const struct dev_pm_ops ibmvnic_pm_ops = { 3969 .resume = ibmvnic_resume 3970 }; 3971 3972 static struct vio_driver ibmvnic_driver = { 3973 .id_table = ibmvnic_device_table, 3974 .probe = ibmvnic_probe, 3975 .remove = ibmvnic_remove, 3976 .get_desired_dma = ibmvnic_get_desired_dma, 3977 .name = ibmvnic_driver_name, 3978 .pm = &ibmvnic_pm_ops, 3979 }; 3980 3981 /* module functions */ 3982 static int __init ibmvnic_module_init(void) 3983 { 3984 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3985 IBMVNIC_DRIVER_VERSION); 3986 3987 return vio_register_driver(&ibmvnic_driver); 3988 } 3989 3990 static void __exit ibmvnic_module_exit(void) 3991 { 3992 vio_unregister_driver(&ibmvnic_driver); 3993 } 3994 3995 module_init(ibmvnic_module_init); 3996 module_exit(ibmvnic_module_exit); 3997