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/seq_file.h> 78 #include <linux/workqueue.h> 79 80 #include "ibmvnic.h" 81 82 static const char ibmvnic_driver_name[] = "ibmvnic"; 83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 84 85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); 86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 87 MODULE_LICENSE("GPL"); 88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 89 90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 91 static int ibmvnic_remove(struct vio_dev *); 92 static void release_sub_crqs(struct ibmvnic_adapter *); 93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static void send_request_unmap(struct ibmvnic_adapter *, u8); 114 115 struct ibmvnic_stat { 116 char name[ETH_GSTRING_LEN]; 117 int offset; 118 }; 119 120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 121 offsetof(struct ibmvnic_statistics, stat)) 122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 123 124 static const struct ibmvnic_stat ibmvnic_stats[] = { 125 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 126 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 127 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 128 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 129 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 130 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 131 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 132 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 133 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 134 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 135 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 136 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 137 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 138 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 139 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 140 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 141 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 142 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 143 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 144 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 145 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 146 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 147 }; 148 149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 150 unsigned long length, unsigned long *number, 151 unsigned long *irq) 152 { 153 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 154 long rc; 155 156 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 157 *number = retbuf[0]; 158 *irq = retbuf[1]; 159 160 return rc; 161 } 162 163 /* net_device_ops functions */ 164 165 static void init_rx_pool(struct ibmvnic_adapter *adapter, 166 struct ibmvnic_rx_pool *rx_pool, int num, int index, 167 int buff_size, int active) 168 { 169 netdev_dbg(adapter->netdev, 170 "Initializing rx_pool %d, %d buffs, %d bytes each\n", 171 index, num, buff_size); 172 rx_pool->size = num; 173 rx_pool->index = index; 174 rx_pool->buff_size = buff_size; 175 rx_pool->active = active; 176 } 177 178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 179 struct ibmvnic_long_term_buff *ltb, int size) 180 { 181 struct device *dev = &adapter->vdev->dev; 182 183 ltb->size = size; 184 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 185 GFP_KERNEL); 186 187 if (!ltb->buff) { 188 dev_err(dev, "Couldn't alloc long term buffer\n"); 189 return -ENOMEM; 190 } 191 ltb->map_id = adapter->map_id; 192 adapter->map_id++; 193 send_request_map(adapter, ltb->addr, 194 ltb->size, ltb->map_id); 195 init_completion(&adapter->fw_done); 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 IBMVNIC_BUFFS_PER_POOL, 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->max_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->max_tx_entries_per_subcrq * 429 adapter->req_mtu)) 430 goto tx_ltb_alloc_failed; 431 432 tx_pool->free_map = 433 kcalloc(adapter->max_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->max_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_enable(&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_tx_pool *tx_pool; 709 unsigned int tx_send_failed = 0; 710 unsigned int tx_map_failed = 0; 711 unsigned int tx_dropped = 0; 712 unsigned int tx_packets = 0; 713 unsigned int tx_bytes = 0; 714 dma_addr_t data_dma_addr; 715 struct netdev_queue *txq; 716 bool used_bounce = false; 717 unsigned long lpar_rc; 718 union sub_crq tx_crq; 719 unsigned int offset; 720 int num_entries = 1; 721 unsigned char *dst; 722 u64 *handle_array; 723 int index = 0; 724 int ret = 0; 725 726 tx_pool = &adapter->tx_pool[queue_num]; 727 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 728 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 729 be32_to_cpu(adapter->login_rsp_buf-> 730 off_txsubm_subcrqs)); 731 if (adapter->migrated) { 732 tx_send_failed++; 733 tx_dropped++; 734 ret = NETDEV_TX_BUSY; 735 goto out; 736 } 737 738 index = tx_pool->free_map[tx_pool->consumer_index]; 739 offset = index * adapter->req_mtu; 740 dst = tx_pool->long_term_buff.buff + offset; 741 memset(dst, 0, adapter->req_mtu); 742 skb_copy_from_linear_data(skb, dst, skb->len); 743 data_dma_addr = tx_pool->long_term_buff.addr + offset; 744 745 tx_pool->consumer_index = 746 (tx_pool->consumer_index + 1) % 747 adapter->max_tx_entries_per_subcrq; 748 749 tx_buff = &tx_pool->tx_buff[index]; 750 tx_buff->skb = skb; 751 tx_buff->data_dma[0] = data_dma_addr; 752 tx_buff->data_len[0] = skb->len; 753 tx_buff->index = index; 754 tx_buff->pool_index = queue_num; 755 tx_buff->last_frag = true; 756 tx_buff->used_bounce = used_bounce; 757 758 memset(&tx_crq, 0, sizeof(tx_crq)); 759 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 760 tx_crq.v1.type = IBMVNIC_TX_DESC; 761 tx_crq.v1.n_crq_elem = 1; 762 tx_crq.v1.n_sge = 1; 763 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 764 tx_crq.v1.correlator = cpu_to_be32(index); 765 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 766 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 767 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 768 769 if (adapter->vlan_header_insertion) { 770 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 771 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 772 } 773 774 if (skb->protocol == htons(ETH_P_IP)) { 775 if (ip_hdr(skb)->version == 4) 776 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 777 else if (ip_hdr(skb)->version == 6) 778 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 779 780 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 781 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 782 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 783 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 784 } 785 786 if (skb->ip_summed == CHECKSUM_PARTIAL) { 787 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 788 hdrs += 2; 789 } 790 /* determine if l2/3/4 headers are sent to firmware */ 791 if ((*hdrs >> 7) & 1 && 792 (skb->protocol == htons(ETH_P_IP) || 793 skb->protocol == htons(ETH_P_IPV6))) { 794 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 795 tx_crq.v1.n_crq_elem = num_entries; 796 tx_buff->indir_arr[0] = tx_crq; 797 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 798 sizeof(tx_buff->indir_arr), 799 DMA_TO_DEVICE); 800 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 801 if (!firmware_has_feature(FW_FEATURE_CMO)) 802 dev_err(dev, "tx: unable to map descriptor array\n"); 803 tx_map_failed++; 804 tx_dropped++; 805 ret = NETDEV_TX_BUSY; 806 goto out; 807 } 808 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 809 (u64)tx_buff->indir_dma, 810 (u64)num_entries); 811 } else { 812 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 813 &tx_crq); 814 } 815 if (lpar_rc != H_SUCCESS) { 816 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 817 818 if (tx_pool->consumer_index == 0) 819 tx_pool->consumer_index = 820 adapter->max_tx_entries_per_subcrq - 1; 821 else 822 tx_pool->consumer_index--; 823 824 tx_send_failed++; 825 tx_dropped++; 826 ret = NETDEV_TX_BUSY; 827 goto out; 828 } 829 tx_packets++; 830 tx_bytes += skb->len; 831 txq->trans_start = jiffies; 832 ret = NETDEV_TX_OK; 833 834 out: 835 netdev->stats.tx_dropped += tx_dropped; 836 netdev->stats.tx_bytes += tx_bytes; 837 netdev->stats.tx_packets += tx_packets; 838 adapter->tx_send_failed += tx_send_failed; 839 adapter->tx_map_failed += tx_map_failed; 840 841 return ret; 842 } 843 844 static void ibmvnic_set_multi(struct net_device *netdev) 845 { 846 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 847 struct netdev_hw_addr *ha; 848 union ibmvnic_crq crq; 849 850 memset(&crq, 0, sizeof(crq)); 851 crq.request_capability.first = IBMVNIC_CRQ_CMD; 852 crq.request_capability.cmd = REQUEST_CAPABILITY; 853 854 if (netdev->flags & IFF_PROMISC) { 855 if (!adapter->promisc_supported) 856 return; 857 } else { 858 if (netdev->flags & IFF_ALLMULTI) { 859 /* Accept all multicast */ 860 memset(&crq, 0, sizeof(crq)); 861 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 862 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 863 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 864 ibmvnic_send_crq(adapter, &crq); 865 } else if (netdev_mc_empty(netdev)) { 866 /* Reject all multicast */ 867 memset(&crq, 0, sizeof(crq)); 868 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 869 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 870 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 871 ibmvnic_send_crq(adapter, &crq); 872 } else { 873 /* Accept one or more multicast(s) */ 874 netdev_for_each_mc_addr(ha, netdev) { 875 memset(&crq, 0, sizeof(crq)); 876 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 877 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 878 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 879 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 880 ha->addr); 881 ibmvnic_send_crq(adapter, &crq); 882 } 883 } 884 } 885 } 886 887 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 888 { 889 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 890 struct sockaddr *addr = p; 891 union ibmvnic_crq crq; 892 893 if (!is_valid_ether_addr(addr->sa_data)) 894 return -EADDRNOTAVAIL; 895 896 memset(&crq, 0, sizeof(crq)); 897 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 898 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 899 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 900 ibmvnic_send_crq(adapter, &crq); 901 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 902 return 0; 903 } 904 905 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 906 { 907 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 908 909 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu) 910 return -EINVAL; 911 912 netdev->mtu = new_mtu; 913 return 0; 914 } 915 916 static void ibmvnic_tx_timeout(struct net_device *dev) 917 { 918 struct ibmvnic_adapter *adapter = netdev_priv(dev); 919 int rc; 920 921 /* Adapter timed out, resetting it */ 922 release_sub_crqs(adapter); 923 rc = ibmvnic_reset_crq(adapter); 924 if (rc) 925 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 926 else 927 ibmvnic_send_crq_init(adapter); 928 } 929 930 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 931 struct ibmvnic_rx_buff *rx_buff) 932 { 933 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 934 935 rx_buff->skb = NULL; 936 937 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 938 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 939 940 atomic_dec(&pool->available); 941 } 942 943 static int ibmvnic_poll(struct napi_struct *napi, int budget) 944 { 945 struct net_device *netdev = napi->dev; 946 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 947 int scrq_num = (int)(napi - adapter->napi); 948 int frames_processed = 0; 949 restart_poll: 950 while (frames_processed < budget) { 951 struct sk_buff *skb; 952 struct ibmvnic_rx_buff *rx_buff; 953 union sub_crq *next; 954 u32 length; 955 u16 offset; 956 u8 flags = 0; 957 958 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 959 break; 960 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 961 rx_buff = 962 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 963 rx_comp.correlator); 964 /* do error checking */ 965 if (next->rx_comp.rc) { 966 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 967 /* free the entry */ 968 next->rx_comp.first = 0; 969 remove_buff_from_pool(adapter, rx_buff); 970 break; 971 } 972 973 length = be32_to_cpu(next->rx_comp.len); 974 offset = be16_to_cpu(next->rx_comp.off_frame_data); 975 flags = next->rx_comp.flags; 976 skb = rx_buff->skb; 977 skb_copy_to_linear_data(skb, rx_buff->data + offset, 978 length); 979 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); 980 /* free the entry */ 981 next->rx_comp.first = 0; 982 remove_buff_from_pool(adapter, rx_buff); 983 984 skb_put(skb, length); 985 skb->protocol = eth_type_trans(skb, netdev); 986 987 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 988 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 989 skb->ip_summed = CHECKSUM_UNNECESSARY; 990 } 991 992 length = skb->len; 993 napi_gro_receive(napi, skb); /* send it up */ 994 netdev->stats.rx_packets++; 995 netdev->stats.rx_bytes += length; 996 frames_processed++; 997 } 998 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 999 1000 if (frames_processed < budget) { 1001 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1002 napi_complete(napi); 1003 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1004 napi_reschedule(napi)) { 1005 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1006 goto restart_poll; 1007 } 1008 } 1009 return frames_processed; 1010 } 1011 1012 #ifdef CONFIG_NET_POLL_CONTROLLER 1013 static void ibmvnic_netpoll_controller(struct net_device *dev) 1014 { 1015 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1016 int i; 1017 1018 replenish_pools(netdev_priv(dev)); 1019 for (i = 0; i < adapter->req_rx_queues; i++) 1020 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1021 adapter->rx_scrq[i]); 1022 } 1023 #endif 1024 1025 static const struct net_device_ops ibmvnic_netdev_ops = { 1026 .ndo_open = ibmvnic_open, 1027 .ndo_stop = ibmvnic_close, 1028 .ndo_start_xmit = ibmvnic_xmit, 1029 .ndo_set_rx_mode = ibmvnic_set_multi, 1030 .ndo_set_mac_address = ibmvnic_set_mac, 1031 .ndo_validate_addr = eth_validate_addr, 1032 .ndo_change_mtu = ibmvnic_change_mtu, 1033 .ndo_tx_timeout = ibmvnic_tx_timeout, 1034 #ifdef CONFIG_NET_POLL_CONTROLLER 1035 .ndo_poll_controller = ibmvnic_netpoll_controller, 1036 #endif 1037 }; 1038 1039 /* ethtool functions */ 1040 1041 static int ibmvnic_get_settings(struct net_device *netdev, 1042 struct ethtool_cmd *cmd) 1043 { 1044 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1045 SUPPORTED_FIBRE); 1046 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1047 ADVERTISED_FIBRE); 1048 ethtool_cmd_speed_set(cmd, SPEED_1000); 1049 cmd->duplex = DUPLEX_FULL; 1050 cmd->port = PORT_FIBRE; 1051 cmd->phy_address = 0; 1052 cmd->transceiver = XCVR_INTERNAL; 1053 cmd->autoneg = AUTONEG_ENABLE; 1054 cmd->maxtxpkt = 0; 1055 cmd->maxrxpkt = 1; 1056 return 0; 1057 } 1058 1059 static void ibmvnic_get_drvinfo(struct net_device *dev, 1060 struct ethtool_drvinfo *info) 1061 { 1062 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1063 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1064 } 1065 1066 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1067 { 1068 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1069 1070 return adapter->msg_enable; 1071 } 1072 1073 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1074 { 1075 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1076 1077 adapter->msg_enable = data; 1078 } 1079 1080 static u32 ibmvnic_get_link(struct net_device *netdev) 1081 { 1082 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1083 1084 /* Don't need to send a query because we request a logical link up at 1085 * init and then we wait for link state indications 1086 */ 1087 return adapter->logical_link_state; 1088 } 1089 1090 static void ibmvnic_get_ringparam(struct net_device *netdev, 1091 struct ethtool_ringparam *ring) 1092 { 1093 ring->rx_max_pending = 0; 1094 ring->tx_max_pending = 0; 1095 ring->rx_mini_max_pending = 0; 1096 ring->rx_jumbo_max_pending = 0; 1097 ring->rx_pending = 0; 1098 ring->tx_pending = 0; 1099 ring->rx_mini_pending = 0; 1100 ring->rx_jumbo_pending = 0; 1101 } 1102 1103 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1104 { 1105 int i; 1106 1107 if (stringset != ETH_SS_STATS) 1108 return; 1109 1110 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1111 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1112 } 1113 1114 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1115 { 1116 switch (sset) { 1117 case ETH_SS_STATS: 1118 return ARRAY_SIZE(ibmvnic_stats); 1119 default: 1120 return -EOPNOTSUPP; 1121 } 1122 } 1123 1124 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1125 struct ethtool_stats *stats, u64 *data) 1126 { 1127 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1128 union ibmvnic_crq crq; 1129 int i; 1130 1131 memset(&crq, 0, sizeof(crq)); 1132 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1133 crq.request_statistics.cmd = REQUEST_STATISTICS; 1134 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1135 crq.request_statistics.len = 1136 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1137 ibmvnic_send_crq(adapter, &crq); 1138 1139 /* Wait for data to be written */ 1140 init_completion(&adapter->stats_done); 1141 wait_for_completion(&adapter->stats_done); 1142 1143 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1144 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1145 } 1146 1147 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1148 .get_settings = ibmvnic_get_settings, 1149 .get_drvinfo = ibmvnic_get_drvinfo, 1150 .get_msglevel = ibmvnic_get_msglevel, 1151 .set_msglevel = ibmvnic_set_msglevel, 1152 .get_link = ibmvnic_get_link, 1153 .get_ringparam = ibmvnic_get_ringparam, 1154 .get_strings = ibmvnic_get_strings, 1155 .get_sset_count = ibmvnic_get_sset_count, 1156 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1157 }; 1158 1159 /* Routines for managing CRQs/sCRQs */ 1160 1161 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1162 struct ibmvnic_sub_crq_queue *scrq) 1163 { 1164 struct device *dev = &adapter->vdev->dev; 1165 long rc; 1166 1167 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1168 1169 /* Close the sub-crqs */ 1170 do { 1171 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1172 adapter->vdev->unit_address, 1173 scrq->crq_num); 1174 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1175 1176 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1177 DMA_BIDIRECTIONAL); 1178 free_pages((unsigned long)scrq->msgs, 2); 1179 kfree(scrq); 1180 } 1181 1182 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1183 *adapter) 1184 { 1185 struct device *dev = &adapter->vdev->dev; 1186 struct ibmvnic_sub_crq_queue *scrq; 1187 int rc; 1188 1189 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); 1190 if (!scrq) 1191 return NULL; 1192 1193 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); 1194 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1195 if (!scrq->msgs) { 1196 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1197 goto zero_page_failed; 1198 } 1199 1200 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1201 DMA_BIDIRECTIONAL); 1202 if (dma_mapping_error(dev, scrq->msg_token)) { 1203 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1204 goto map_failed; 1205 } 1206 1207 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1208 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1209 1210 if (rc == H_RESOURCE) 1211 rc = ibmvnic_reset_crq(adapter); 1212 1213 if (rc == H_CLOSED) { 1214 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1215 } else if (rc) { 1216 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1217 goto reg_failed; 1218 } 1219 1220 scrq->adapter = adapter; 1221 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1222 scrq->cur = 0; 1223 scrq->rx_skb_top = NULL; 1224 spin_lock_init(&scrq->lock); 1225 1226 netdev_dbg(adapter->netdev, 1227 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1228 scrq->crq_num, scrq->hw_irq, scrq->irq); 1229 1230 return scrq; 1231 1232 reg_failed: 1233 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1234 DMA_BIDIRECTIONAL); 1235 map_failed: 1236 free_pages((unsigned long)scrq->msgs, 2); 1237 zero_page_failed: 1238 kfree(scrq); 1239 1240 return NULL; 1241 } 1242 1243 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1244 { 1245 int i; 1246 1247 if (adapter->tx_scrq) { 1248 for (i = 0; i < adapter->req_tx_queues; i++) 1249 if (adapter->tx_scrq[i]) { 1250 free_irq(adapter->tx_scrq[i]->irq, 1251 adapter->tx_scrq[i]); 1252 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1253 release_sub_crq_queue(adapter, 1254 adapter->tx_scrq[i]); 1255 } 1256 adapter->tx_scrq = NULL; 1257 } 1258 1259 if (adapter->rx_scrq) { 1260 for (i = 0; i < adapter->req_rx_queues; i++) 1261 if (adapter->rx_scrq[i]) { 1262 free_irq(adapter->rx_scrq[i]->irq, 1263 adapter->rx_scrq[i]); 1264 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1265 release_sub_crq_queue(adapter, 1266 adapter->rx_scrq[i]); 1267 } 1268 adapter->rx_scrq = NULL; 1269 } 1270 1271 adapter->requested_caps = 0; 1272 } 1273 1274 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter) 1275 { 1276 int i; 1277 1278 if (adapter->tx_scrq) { 1279 for (i = 0; i < adapter->req_tx_queues; i++) 1280 if (adapter->tx_scrq[i]) 1281 release_sub_crq_queue(adapter, 1282 adapter->tx_scrq[i]); 1283 adapter->tx_scrq = NULL; 1284 } 1285 1286 if (adapter->rx_scrq) { 1287 for (i = 0; i < adapter->req_rx_queues; i++) 1288 if (adapter->rx_scrq[i]) 1289 release_sub_crq_queue(adapter, 1290 adapter->rx_scrq[i]); 1291 adapter->rx_scrq = NULL; 1292 } 1293 1294 adapter->requested_caps = 0; 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 dev_kfree_skb_any(txbuff->skb); 1371 1372 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1373 producer_index] = index; 1374 adapter->tx_pool[pool].producer_index = 1375 (adapter->tx_pool[pool].producer_index + 1) % 1376 adapter->max_tx_entries_per_subcrq; 1377 } 1378 /* remove tx_comp scrq*/ 1379 next->tx_comp.first = 0; 1380 } 1381 1382 enable_scrq_irq(adapter, scrq); 1383 1384 if (pending_scrq(adapter, scrq)) { 1385 disable_scrq_irq(adapter, scrq); 1386 goto restart_loop; 1387 } 1388 1389 return 0; 1390 } 1391 1392 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1393 { 1394 struct ibmvnic_sub_crq_queue *scrq = instance; 1395 struct ibmvnic_adapter *adapter = scrq->adapter; 1396 1397 disable_scrq_irq(adapter, scrq); 1398 ibmvnic_complete_tx(adapter, scrq); 1399 1400 return IRQ_HANDLED; 1401 } 1402 1403 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1404 { 1405 struct ibmvnic_sub_crq_queue *scrq = instance; 1406 struct ibmvnic_adapter *adapter = scrq->adapter; 1407 1408 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1409 disable_scrq_irq(adapter, scrq); 1410 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1411 } 1412 1413 return IRQ_HANDLED; 1414 } 1415 1416 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1417 { 1418 struct device *dev = &adapter->vdev->dev; 1419 struct ibmvnic_sub_crq_queue *scrq; 1420 int i = 0, j = 0; 1421 int rc = 0; 1422 1423 for (i = 0; i < adapter->req_tx_queues; i++) { 1424 scrq = adapter->tx_scrq[i]; 1425 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1426 1427 if (!scrq->irq) { 1428 rc = -EINVAL; 1429 dev_err(dev, "Error mapping irq\n"); 1430 goto req_tx_irq_failed; 1431 } 1432 1433 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1434 0, "ibmvnic_tx", scrq); 1435 1436 if (rc) { 1437 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1438 scrq->irq, rc); 1439 irq_dispose_mapping(scrq->irq); 1440 goto req_rx_irq_failed; 1441 } 1442 } 1443 1444 for (i = 0; i < adapter->req_rx_queues; i++) { 1445 scrq = adapter->rx_scrq[i]; 1446 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1447 if (!scrq->irq) { 1448 rc = -EINVAL; 1449 dev_err(dev, "Error mapping irq\n"); 1450 goto req_rx_irq_failed; 1451 } 1452 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1453 0, "ibmvnic_rx", scrq); 1454 if (rc) { 1455 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1456 scrq->irq, rc); 1457 irq_dispose_mapping(scrq->irq); 1458 goto req_rx_irq_failed; 1459 } 1460 } 1461 return rc; 1462 1463 req_rx_irq_failed: 1464 for (j = 0; j < i; j++) { 1465 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1466 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1467 } 1468 i = adapter->req_tx_queues; 1469 req_tx_irq_failed: 1470 for (j = 0; j < i; j++) { 1471 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1472 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1473 } 1474 release_sub_crqs_no_irqs(adapter); 1475 return rc; 1476 } 1477 1478 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) 1479 { 1480 struct device *dev = &adapter->vdev->dev; 1481 struct ibmvnic_sub_crq_queue **allqueues; 1482 int registered_queues = 0; 1483 union ibmvnic_crq crq; 1484 int total_queues; 1485 int more = 0; 1486 int i; 1487 1488 if (!retry) { 1489 /* Sub-CRQ entries are 32 byte long */ 1490 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1491 1492 if (adapter->min_tx_entries_per_subcrq > entries_page || 1493 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1494 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1495 goto allqueues_failed; 1496 } 1497 1498 /* Get the minimum between the queried max and the entries 1499 * that fit in our PAGE_SIZE 1500 */ 1501 adapter->req_tx_entries_per_subcrq = 1502 adapter->max_tx_entries_per_subcrq > entries_page ? 1503 entries_page : adapter->max_tx_entries_per_subcrq; 1504 adapter->req_rx_add_entries_per_subcrq = 1505 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1506 entries_page : adapter->max_rx_add_entries_per_subcrq; 1507 1508 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1509 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1510 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1511 1512 adapter->req_mtu = adapter->max_mtu; 1513 } 1514 1515 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1516 1517 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); 1518 if (!allqueues) 1519 goto allqueues_failed; 1520 1521 for (i = 0; i < total_queues; i++) { 1522 allqueues[i] = init_sub_crq_queue(adapter); 1523 if (!allqueues[i]) { 1524 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1525 break; 1526 } 1527 registered_queues++; 1528 } 1529 1530 /* Make sure we were able to register the minimum number of queues */ 1531 if (registered_queues < 1532 adapter->min_tx_queues + adapter->min_rx_queues) { 1533 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1534 goto tx_failed; 1535 } 1536 1537 /* Distribute the failed allocated queues*/ 1538 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1539 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1540 switch (i % 3) { 1541 case 0: 1542 if (adapter->req_rx_queues > adapter->min_rx_queues) 1543 adapter->req_rx_queues--; 1544 else 1545 more++; 1546 break; 1547 case 1: 1548 if (adapter->req_tx_queues > adapter->min_tx_queues) 1549 adapter->req_tx_queues--; 1550 else 1551 more++; 1552 break; 1553 } 1554 } 1555 1556 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1557 sizeof(*adapter->tx_scrq), GFP_ATOMIC); 1558 if (!adapter->tx_scrq) 1559 goto tx_failed; 1560 1561 for (i = 0; i < adapter->req_tx_queues; i++) { 1562 adapter->tx_scrq[i] = allqueues[i]; 1563 adapter->tx_scrq[i]->pool_index = i; 1564 } 1565 1566 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1567 sizeof(*adapter->rx_scrq), GFP_ATOMIC); 1568 if (!adapter->rx_scrq) 1569 goto rx_failed; 1570 1571 for (i = 0; i < adapter->req_rx_queues; i++) { 1572 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1573 adapter->rx_scrq[i]->scrq_num = i; 1574 } 1575 1576 memset(&crq, 0, sizeof(crq)); 1577 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1578 crq.request_capability.cmd = REQUEST_CAPABILITY; 1579 1580 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1581 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1582 ibmvnic_send_crq(adapter, &crq); 1583 1584 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1585 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1586 ibmvnic_send_crq(adapter, &crq); 1587 1588 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1589 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1590 ibmvnic_send_crq(adapter, &crq); 1591 1592 crq.request_capability.capability = 1593 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1594 crq.request_capability.number = 1595 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1596 ibmvnic_send_crq(adapter, &crq); 1597 1598 crq.request_capability.capability = 1599 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1600 crq.request_capability.number = 1601 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1602 ibmvnic_send_crq(adapter, &crq); 1603 1604 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1605 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1606 ibmvnic_send_crq(adapter, &crq); 1607 1608 if (adapter->netdev->flags & IFF_PROMISC) { 1609 if (adapter->promisc_supported) { 1610 crq.request_capability.capability = 1611 cpu_to_be16(PROMISC_REQUESTED); 1612 crq.request_capability.number = cpu_to_be64(1); 1613 ibmvnic_send_crq(adapter, &crq); 1614 } 1615 } else { 1616 crq.request_capability.capability = 1617 cpu_to_be16(PROMISC_REQUESTED); 1618 crq.request_capability.number = cpu_to_be64(0); 1619 ibmvnic_send_crq(adapter, &crq); 1620 } 1621 1622 kfree(allqueues); 1623 1624 return; 1625 1626 rx_failed: 1627 kfree(adapter->tx_scrq); 1628 adapter->tx_scrq = NULL; 1629 tx_failed: 1630 for (i = 0; i < registered_queues; i++) 1631 release_sub_crq_queue(adapter, allqueues[i]); 1632 kfree(allqueues); 1633 allqueues_failed: 1634 ibmvnic_remove(adapter->vdev); 1635 } 1636 1637 static int pending_scrq(struct ibmvnic_adapter *adapter, 1638 struct ibmvnic_sub_crq_queue *scrq) 1639 { 1640 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1641 1642 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1643 return 1; 1644 else 1645 return 0; 1646 } 1647 1648 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1649 struct ibmvnic_sub_crq_queue *scrq) 1650 { 1651 union sub_crq *entry; 1652 unsigned long flags; 1653 1654 spin_lock_irqsave(&scrq->lock, flags); 1655 entry = &scrq->msgs[scrq->cur]; 1656 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1657 if (++scrq->cur == scrq->size) 1658 scrq->cur = 0; 1659 } else { 1660 entry = NULL; 1661 } 1662 spin_unlock_irqrestore(&scrq->lock, flags); 1663 1664 return entry; 1665 } 1666 1667 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1668 { 1669 struct ibmvnic_crq_queue *queue = &adapter->crq; 1670 union ibmvnic_crq *crq; 1671 1672 crq = &queue->msgs[queue->cur]; 1673 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1674 if (++queue->cur == queue->size) 1675 queue->cur = 0; 1676 } else { 1677 crq = NULL; 1678 } 1679 1680 return crq; 1681 } 1682 1683 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1684 union sub_crq *sub_crq) 1685 { 1686 unsigned int ua = adapter->vdev->unit_address; 1687 struct device *dev = &adapter->vdev->dev; 1688 u64 *u64_crq = (u64 *)sub_crq; 1689 int rc; 1690 1691 netdev_dbg(adapter->netdev, 1692 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1693 (unsigned long int)cpu_to_be64(remote_handle), 1694 (unsigned long int)cpu_to_be64(u64_crq[0]), 1695 (unsigned long int)cpu_to_be64(u64_crq[1]), 1696 (unsigned long int)cpu_to_be64(u64_crq[2]), 1697 (unsigned long int)cpu_to_be64(u64_crq[3])); 1698 1699 /* Make sure the hypervisor sees the complete request */ 1700 mb(); 1701 1702 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1703 cpu_to_be64(remote_handle), 1704 cpu_to_be64(u64_crq[0]), 1705 cpu_to_be64(u64_crq[1]), 1706 cpu_to_be64(u64_crq[2]), 1707 cpu_to_be64(u64_crq[3])); 1708 1709 if (rc) { 1710 if (rc == H_CLOSED) 1711 dev_warn(dev, "CRQ Queue closed\n"); 1712 dev_err(dev, "Send error (rc=%d)\n", rc); 1713 } 1714 1715 return rc; 1716 } 1717 1718 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1719 u64 remote_handle, u64 ioba, u64 num_entries) 1720 { 1721 unsigned int ua = adapter->vdev->unit_address; 1722 struct device *dev = &adapter->vdev->dev; 1723 int rc; 1724 1725 /* Make sure the hypervisor sees the complete request */ 1726 mb(); 1727 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1728 cpu_to_be64(remote_handle), 1729 ioba, num_entries); 1730 1731 if (rc) { 1732 if (rc == H_CLOSED) 1733 dev_warn(dev, "CRQ Queue closed\n"); 1734 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1735 } 1736 1737 return rc; 1738 } 1739 1740 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1741 union ibmvnic_crq *crq) 1742 { 1743 unsigned int ua = adapter->vdev->unit_address; 1744 struct device *dev = &adapter->vdev->dev; 1745 u64 *u64_crq = (u64 *)crq; 1746 int rc; 1747 1748 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1749 (unsigned long int)cpu_to_be64(u64_crq[0]), 1750 (unsigned long int)cpu_to_be64(u64_crq[1])); 1751 1752 /* Make sure the hypervisor sees the complete request */ 1753 mb(); 1754 1755 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1756 cpu_to_be64(u64_crq[0]), 1757 cpu_to_be64(u64_crq[1])); 1758 1759 if (rc) { 1760 if (rc == H_CLOSED) 1761 dev_warn(dev, "CRQ Queue closed\n"); 1762 dev_warn(dev, "Send error (rc=%d)\n", rc); 1763 } 1764 1765 return rc; 1766 } 1767 1768 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1769 { 1770 union ibmvnic_crq crq; 1771 1772 memset(&crq, 0, sizeof(crq)); 1773 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1774 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1775 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1776 1777 return ibmvnic_send_crq(adapter, &crq); 1778 } 1779 1780 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1781 { 1782 union ibmvnic_crq crq; 1783 1784 memset(&crq, 0, sizeof(crq)); 1785 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1786 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 1787 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 1788 1789 return ibmvnic_send_crq(adapter, &crq); 1790 } 1791 1792 static int send_version_xchg(struct ibmvnic_adapter *adapter) 1793 { 1794 union ibmvnic_crq crq; 1795 1796 memset(&crq, 0, sizeof(crq)); 1797 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 1798 crq.version_exchange.cmd = VERSION_EXCHANGE; 1799 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 1800 1801 return ibmvnic_send_crq(adapter, &crq); 1802 } 1803 1804 static void send_login(struct ibmvnic_adapter *adapter) 1805 { 1806 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 1807 struct ibmvnic_login_buffer *login_buffer; 1808 struct ibmvnic_inflight_cmd *inflight_cmd; 1809 struct device *dev = &adapter->vdev->dev; 1810 dma_addr_t rsp_buffer_token; 1811 dma_addr_t buffer_token; 1812 size_t rsp_buffer_size; 1813 union ibmvnic_crq crq; 1814 unsigned long flags; 1815 size_t buffer_size; 1816 __be64 *tx_list_p; 1817 __be64 *rx_list_p; 1818 int i; 1819 1820 buffer_size = 1821 sizeof(struct ibmvnic_login_buffer) + 1822 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 1823 1824 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 1825 if (!login_buffer) 1826 goto buf_alloc_failed; 1827 1828 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 1829 DMA_TO_DEVICE); 1830 if (dma_mapping_error(dev, buffer_token)) { 1831 dev_err(dev, "Couldn't map login buffer\n"); 1832 goto buf_map_failed; 1833 } 1834 1835 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 1836 sizeof(u64) * adapter->req_tx_queues + 1837 sizeof(u64) * adapter->req_rx_queues + 1838 sizeof(u64) * adapter->req_rx_queues + 1839 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 1840 1841 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 1842 if (!login_rsp_buffer) 1843 goto buf_rsp_alloc_failed; 1844 1845 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 1846 rsp_buffer_size, DMA_FROM_DEVICE); 1847 if (dma_mapping_error(dev, rsp_buffer_token)) { 1848 dev_err(dev, "Couldn't map login rsp buffer\n"); 1849 goto buf_rsp_map_failed; 1850 } 1851 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 1852 if (!inflight_cmd) { 1853 dev_err(dev, "Couldn't allocate inflight_cmd\n"); 1854 goto inflight_alloc_failed; 1855 } 1856 adapter->login_buf = login_buffer; 1857 adapter->login_buf_token = buffer_token; 1858 adapter->login_buf_sz = buffer_size; 1859 adapter->login_rsp_buf = login_rsp_buffer; 1860 adapter->login_rsp_buf_token = rsp_buffer_token; 1861 adapter->login_rsp_buf_sz = rsp_buffer_size; 1862 1863 login_buffer->len = cpu_to_be32(buffer_size); 1864 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 1865 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 1866 login_buffer->off_txcomp_subcrqs = 1867 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 1868 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 1869 login_buffer->off_rxcomp_subcrqs = 1870 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 1871 sizeof(u64) * adapter->req_tx_queues); 1872 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 1873 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 1874 1875 tx_list_p = (__be64 *)((char *)login_buffer + 1876 sizeof(struct ibmvnic_login_buffer)); 1877 rx_list_p = (__be64 *)((char *)login_buffer + 1878 sizeof(struct ibmvnic_login_buffer) + 1879 sizeof(u64) * adapter->req_tx_queues); 1880 1881 for (i = 0; i < adapter->req_tx_queues; i++) { 1882 if (adapter->tx_scrq[i]) { 1883 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 1884 crq_num); 1885 } 1886 } 1887 1888 for (i = 0; i < adapter->req_rx_queues; i++) { 1889 if (adapter->rx_scrq[i]) { 1890 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 1891 crq_num); 1892 } 1893 } 1894 1895 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 1896 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 1897 netdev_dbg(adapter->netdev, "%016lx\n", 1898 ((unsigned long int *)(adapter->login_buf))[i]); 1899 } 1900 1901 memset(&crq, 0, sizeof(crq)); 1902 crq.login.first = IBMVNIC_CRQ_CMD; 1903 crq.login.cmd = LOGIN; 1904 crq.login.ioba = cpu_to_be32(buffer_token); 1905 crq.login.len = cpu_to_be32(buffer_size); 1906 1907 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 1908 1909 spin_lock_irqsave(&adapter->inflight_lock, flags); 1910 list_add_tail(&inflight_cmd->list, &adapter->inflight); 1911 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 1912 1913 ibmvnic_send_crq(adapter, &crq); 1914 1915 return; 1916 1917 inflight_alloc_failed: 1918 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 1919 DMA_FROM_DEVICE); 1920 buf_rsp_map_failed: 1921 kfree(login_rsp_buffer); 1922 buf_rsp_alloc_failed: 1923 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 1924 buf_map_failed: 1925 kfree(login_buffer); 1926 buf_alloc_failed: 1927 return; 1928 } 1929 1930 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 1931 u32 len, u8 map_id) 1932 { 1933 union ibmvnic_crq crq; 1934 1935 memset(&crq, 0, sizeof(crq)); 1936 crq.request_map.first = IBMVNIC_CRQ_CMD; 1937 crq.request_map.cmd = REQUEST_MAP; 1938 crq.request_map.map_id = map_id; 1939 crq.request_map.ioba = cpu_to_be32(addr); 1940 crq.request_map.len = cpu_to_be32(len); 1941 ibmvnic_send_crq(adapter, &crq); 1942 } 1943 1944 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 1945 { 1946 union ibmvnic_crq crq; 1947 1948 memset(&crq, 0, sizeof(crq)); 1949 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 1950 crq.request_unmap.cmd = REQUEST_UNMAP; 1951 crq.request_unmap.map_id = map_id; 1952 ibmvnic_send_crq(adapter, &crq); 1953 } 1954 1955 static void send_map_query(struct ibmvnic_adapter *adapter) 1956 { 1957 union ibmvnic_crq crq; 1958 1959 memset(&crq, 0, sizeof(crq)); 1960 crq.query_map.first = IBMVNIC_CRQ_CMD; 1961 crq.query_map.cmd = QUERY_MAP; 1962 ibmvnic_send_crq(adapter, &crq); 1963 } 1964 1965 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 1966 static void send_cap_queries(struct ibmvnic_adapter *adapter) 1967 { 1968 union ibmvnic_crq crq; 1969 1970 atomic_set(&adapter->running_cap_queries, 0); 1971 memset(&crq, 0, sizeof(crq)); 1972 crq.query_capability.first = IBMVNIC_CRQ_CMD; 1973 crq.query_capability.cmd = QUERY_CAPABILITY; 1974 1975 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 1976 atomic_inc(&adapter->running_cap_queries); 1977 ibmvnic_send_crq(adapter, &crq); 1978 1979 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 1980 atomic_inc(&adapter->running_cap_queries); 1981 ibmvnic_send_crq(adapter, &crq); 1982 1983 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 1984 atomic_inc(&adapter->running_cap_queries); 1985 ibmvnic_send_crq(adapter, &crq); 1986 1987 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 1988 atomic_inc(&adapter->running_cap_queries); 1989 ibmvnic_send_crq(adapter, &crq); 1990 1991 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 1992 atomic_inc(&adapter->running_cap_queries); 1993 ibmvnic_send_crq(adapter, &crq); 1994 1995 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 1996 atomic_inc(&adapter->running_cap_queries); 1997 ibmvnic_send_crq(adapter, &crq); 1998 1999 crq.query_capability.capability = 2000 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2001 atomic_inc(&adapter->running_cap_queries); 2002 ibmvnic_send_crq(adapter, &crq); 2003 2004 crq.query_capability.capability = 2005 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2006 atomic_inc(&adapter->running_cap_queries); 2007 ibmvnic_send_crq(adapter, &crq); 2008 2009 crq.query_capability.capability = 2010 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2011 atomic_inc(&adapter->running_cap_queries); 2012 ibmvnic_send_crq(adapter, &crq); 2013 2014 crq.query_capability.capability = 2015 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2016 atomic_inc(&adapter->running_cap_queries); 2017 ibmvnic_send_crq(adapter, &crq); 2018 2019 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2020 atomic_inc(&adapter->running_cap_queries); 2021 ibmvnic_send_crq(adapter, &crq); 2022 2023 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2024 atomic_inc(&adapter->running_cap_queries); 2025 ibmvnic_send_crq(adapter, &crq); 2026 2027 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2028 atomic_inc(&adapter->running_cap_queries); 2029 ibmvnic_send_crq(adapter, &crq); 2030 2031 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2032 atomic_inc(&adapter->running_cap_queries); 2033 ibmvnic_send_crq(adapter, &crq); 2034 2035 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2036 atomic_inc(&adapter->running_cap_queries); 2037 ibmvnic_send_crq(adapter, &crq); 2038 2039 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2040 atomic_inc(&adapter->running_cap_queries); 2041 ibmvnic_send_crq(adapter, &crq); 2042 2043 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2044 atomic_inc(&adapter->running_cap_queries); 2045 ibmvnic_send_crq(adapter, &crq); 2046 2047 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2048 atomic_inc(&adapter->running_cap_queries); 2049 ibmvnic_send_crq(adapter, &crq); 2050 2051 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2052 atomic_inc(&adapter->running_cap_queries); 2053 ibmvnic_send_crq(adapter, &crq); 2054 2055 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2056 atomic_inc(&adapter->running_cap_queries); 2057 ibmvnic_send_crq(adapter, &crq); 2058 2059 crq.query_capability.capability = 2060 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2061 atomic_inc(&adapter->running_cap_queries); 2062 ibmvnic_send_crq(adapter, &crq); 2063 2064 crq.query_capability.capability = 2065 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2066 atomic_inc(&adapter->running_cap_queries); 2067 ibmvnic_send_crq(adapter, &crq); 2068 2069 crq.query_capability.capability = 2070 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2071 atomic_inc(&adapter->running_cap_queries); 2072 ibmvnic_send_crq(adapter, &crq); 2073 2074 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2075 atomic_inc(&adapter->running_cap_queries); 2076 ibmvnic_send_crq(adapter, &crq); 2077 } 2078 2079 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2080 { 2081 struct device *dev = &adapter->vdev->dev; 2082 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2083 union ibmvnic_crq crq; 2084 int i; 2085 2086 dma_unmap_single(dev, adapter->ip_offload_tok, 2087 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2088 2089 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2090 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2091 netdev_dbg(adapter->netdev, "%016lx\n", 2092 ((unsigned long int *)(buf))[i]); 2093 2094 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2095 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2096 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2097 buf->tcp_ipv4_chksum); 2098 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2099 buf->tcp_ipv6_chksum); 2100 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2101 buf->udp_ipv4_chksum); 2102 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2103 buf->udp_ipv6_chksum); 2104 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2105 buf->large_tx_ipv4); 2106 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2107 buf->large_tx_ipv6); 2108 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2109 buf->large_rx_ipv4); 2110 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2111 buf->large_rx_ipv6); 2112 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2113 buf->max_ipv4_header_size); 2114 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2115 buf->max_ipv6_header_size); 2116 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2117 buf->max_tcp_header_size); 2118 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2119 buf->max_udp_header_size); 2120 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2121 buf->max_large_tx_size); 2122 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2123 buf->max_large_rx_size); 2124 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2125 buf->ipv6_extension_header); 2126 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2127 buf->tcp_pseudosum_req); 2128 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2129 buf->num_ipv6_ext_headers); 2130 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2131 buf->off_ipv6_ext_headers); 2132 2133 adapter->ip_offload_ctrl_tok = 2134 dma_map_single(dev, &adapter->ip_offload_ctrl, 2135 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2136 2137 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2138 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2139 return; 2140 } 2141 2142 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2143 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2144 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2145 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2146 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2147 2148 /* large_tx/rx disabled for now, additional features needed */ 2149 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2150 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2151 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2152 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2153 2154 adapter->netdev->features = NETIF_F_GSO; 2155 2156 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2157 adapter->netdev->features |= NETIF_F_IP_CSUM; 2158 2159 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2160 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2161 2162 if ((adapter->netdev->features & 2163 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2164 adapter->netdev->features |= NETIF_F_RXCSUM; 2165 2166 memset(&crq, 0, sizeof(crq)); 2167 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2168 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2169 crq.control_ip_offload.len = 2170 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2171 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2172 ibmvnic_send_crq(adapter, &crq); 2173 } 2174 2175 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2176 struct ibmvnic_adapter *adapter) 2177 { 2178 struct device *dev = &adapter->vdev->dev; 2179 struct ibmvnic_error_buff *error_buff, *tmp; 2180 unsigned long flags; 2181 bool found = false; 2182 int i; 2183 2184 if (!crq->request_error_rsp.rc.code) { 2185 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2186 crq->request_error_rsp.rc.code); 2187 return; 2188 } 2189 2190 spin_lock_irqsave(&adapter->error_list_lock, flags); 2191 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2192 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2193 found = true; 2194 list_del(&error_buff->list); 2195 break; 2196 } 2197 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2198 2199 if (!found) { 2200 dev_err(dev, "Couldn't find error id %x\n", 2201 crq->request_error_rsp.error_id); 2202 return; 2203 } 2204 2205 dev_err(dev, "Detailed info for error id %x:", 2206 crq->request_error_rsp.error_id); 2207 2208 for (i = 0; i < error_buff->len; i++) { 2209 pr_cont("%02x", (int)error_buff->buff[i]); 2210 if (i % 8 == 7) 2211 pr_cont(" "); 2212 } 2213 pr_cont("\n"); 2214 2215 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2216 DMA_FROM_DEVICE); 2217 kfree(error_buff->buff); 2218 kfree(error_buff); 2219 } 2220 2221 static void handle_dump_size_rsp(union ibmvnic_crq *crq, 2222 struct ibmvnic_adapter *adapter) 2223 { 2224 int len = be32_to_cpu(crq->request_dump_size_rsp.len); 2225 struct ibmvnic_inflight_cmd *inflight_cmd; 2226 struct device *dev = &adapter->vdev->dev; 2227 union ibmvnic_crq newcrq; 2228 unsigned long flags; 2229 2230 /* allocate and map buffer */ 2231 adapter->dump_data = kmalloc(len, GFP_KERNEL); 2232 if (!adapter->dump_data) { 2233 complete(&adapter->fw_done); 2234 return; 2235 } 2236 2237 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, 2238 DMA_FROM_DEVICE); 2239 2240 if (dma_mapping_error(dev, adapter->dump_data_token)) { 2241 if (!firmware_has_feature(FW_FEATURE_CMO)) 2242 dev_err(dev, "Couldn't map dump data\n"); 2243 kfree(adapter->dump_data); 2244 complete(&adapter->fw_done); 2245 return; 2246 } 2247 2248 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2249 if (!inflight_cmd) { 2250 dma_unmap_single(dev, adapter->dump_data_token, len, 2251 DMA_FROM_DEVICE); 2252 kfree(adapter->dump_data); 2253 complete(&adapter->fw_done); 2254 return; 2255 } 2256 2257 memset(&newcrq, 0, sizeof(newcrq)); 2258 newcrq.request_dump.first = IBMVNIC_CRQ_CMD; 2259 newcrq.request_dump.cmd = REQUEST_DUMP; 2260 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); 2261 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); 2262 2263 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); 2264 2265 spin_lock_irqsave(&adapter->inflight_lock, flags); 2266 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2267 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2268 2269 ibmvnic_send_crq(adapter, &newcrq); 2270 } 2271 2272 static void handle_error_indication(union ibmvnic_crq *crq, 2273 struct ibmvnic_adapter *adapter) 2274 { 2275 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); 2276 struct ibmvnic_inflight_cmd *inflight_cmd; 2277 struct device *dev = &adapter->vdev->dev; 2278 struct ibmvnic_error_buff *error_buff; 2279 union ibmvnic_crq new_crq; 2280 unsigned long flags; 2281 2282 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2283 crq->error_indication. 2284 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2285 crq->error_indication.error_id, 2286 crq->error_indication.error_cause); 2287 2288 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2289 if (!error_buff) 2290 return; 2291 2292 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2293 if (!error_buff->buff) { 2294 kfree(error_buff); 2295 return; 2296 } 2297 2298 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2299 DMA_FROM_DEVICE); 2300 if (dma_mapping_error(dev, error_buff->dma)) { 2301 if (!firmware_has_feature(FW_FEATURE_CMO)) 2302 dev_err(dev, "Couldn't map error buffer\n"); 2303 kfree(error_buff->buff); 2304 kfree(error_buff); 2305 return; 2306 } 2307 2308 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2309 if (!inflight_cmd) { 2310 dma_unmap_single(dev, error_buff->dma, detail_len, 2311 DMA_FROM_DEVICE); 2312 kfree(error_buff->buff); 2313 kfree(error_buff); 2314 return; 2315 } 2316 2317 error_buff->len = detail_len; 2318 error_buff->error_id = crq->error_indication.error_id; 2319 2320 spin_lock_irqsave(&adapter->error_list_lock, flags); 2321 list_add_tail(&error_buff->list, &adapter->errors); 2322 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2323 2324 memset(&new_crq, 0, sizeof(new_crq)); 2325 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2326 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2327 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2328 new_crq.request_error_info.len = cpu_to_be32(detail_len); 2329 new_crq.request_error_info.error_id = crq->error_indication.error_id; 2330 2331 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2332 2333 spin_lock_irqsave(&adapter->inflight_lock, flags); 2334 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2335 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2336 2337 ibmvnic_send_crq(adapter, &new_crq); 2338 } 2339 2340 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2341 struct ibmvnic_adapter *adapter) 2342 { 2343 struct net_device *netdev = adapter->netdev; 2344 struct device *dev = &adapter->vdev->dev; 2345 long rc; 2346 2347 rc = crq->change_mac_addr_rsp.rc.code; 2348 if (rc) { 2349 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2350 return; 2351 } 2352 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2353 ETH_ALEN); 2354 } 2355 2356 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2357 struct ibmvnic_adapter *adapter) 2358 { 2359 struct device *dev = &adapter->vdev->dev; 2360 u64 *req_value; 2361 char *name; 2362 2363 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2364 case REQ_TX_QUEUES: 2365 req_value = &adapter->req_tx_queues; 2366 name = "tx"; 2367 break; 2368 case REQ_RX_QUEUES: 2369 req_value = &adapter->req_rx_queues; 2370 name = "rx"; 2371 break; 2372 case REQ_RX_ADD_QUEUES: 2373 req_value = &adapter->req_rx_add_queues; 2374 name = "rx_add"; 2375 break; 2376 case REQ_TX_ENTRIES_PER_SUBCRQ: 2377 req_value = &adapter->req_tx_entries_per_subcrq; 2378 name = "tx_entries_per_subcrq"; 2379 break; 2380 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2381 req_value = &adapter->req_rx_add_entries_per_subcrq; 2382 name = "rx_add_entries_per_subcrq"; 2383 break; 2384 case REQ_MTU: 2385 req_value = &adapter->req_mtu; 2386 name = "mtu"; 2387 break; 2388 case PROMISC_REQUESTED: 2389 req_value = &adapter->promisc; 2390 name = "promisc"; 2391 break; 2392 default: 2393 dev_err(dev, "Got invalid cap request rsp %d\n", 2394 crq->request_capability.capability); 2395 return; 2396 } 2397 2398 switch (crq->request_capability_rsp.rc.code) { 2399 case SUCCESS: 2400 break; 2401 case PARTIALSUCCESS: 2402 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2403 *req_value, 2404 (long int)be32_to_cpu(crq->request_capability_rsp. 2405 number), name); 2406 release_sub_crqs_no_irqs(adapter); 2407 *req_value = be32_to_cpu(crq->request_capability_rsp.number); 2408 init_sub_crqs(adapter, 1); 2409 return; 2410 default: 2411 dev_err(dev, "Error %d in request cap rsp\n", 2412 crq->request_capability_rsp.rc.code); 2413 return; 2414 } 2415 2416 /* Done receiving requested capabilities, query IP offload support */ 2417 if (++adapter->requested_caps == 7) { 2418 union ibmvnic_crq newcrq; 2419 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2420 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2421 &adapter->ip_offload_buf; 2422 2423 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2424 buf_sz, 2425 DMA_FROM_DEVICE); 2426 2427 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2428 if (!firmware_has_feature(FW_FEATURE_CMO)) 2429 dev_err(dev, "Couldn't map offload buffer\n"); 2430 return; 2431 } 2432 2433 memset(&newcrq, 0, sizeof(newcrq)); 2434 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2435 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2436 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2437 newcrq.query_ip_offload.ioba = 2438 cpu_to_be32(adapter->ip_offload_tok); 2439 2440 ibmvnic_send_crq(adapter, &newcrq); 2441 } 2442 } 2443 2444 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2445 struct ibmvnic_adapter *adapter) 2446 { 2447 struct device *dev = &adapter->vdev->dev; 2448 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2449 struct ibmvnic_login_buffer *login = adapter->login_buf; 2450 union ibmvnic_crq crq; 2451 int i; 2452 2453 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2454 DMA_BIDIRECTIONAL); 2455 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2456 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2457 2458 /* If the number of queues requested can't be allocated by the 2459 * server, the login response will return with code 1. We will need 2460 * to resend the login buffer with fewer queues requested. 2461 */ 2462 if (login_rsp_crq->generic.rc.code) { 2463 adapter->renegotiate = true; 2464 complete(&adapter->init_done); 2465 return 0; 2466 } 2467 2468 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2469 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2470 netdev_dbg(adapter->netdev, "%016lx\n", 2471 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2472 } 2473 2474 /* Sanity checks */ 2475 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2476 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2477 adapter->req_rx_add_queues != 2478 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2479 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2480 ibmvnic_remove(adapter->vdev); 2481 return -EIO; 2482 } 2483 complete(&adapter->init_done); 2484 2485 memset(&crq, 0, sizeof(crq)); 2486 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; 2487 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; 2488 ibmvnic_send_crq(adapter, &crq); 2489 2490 return 0; 2491 } 2492 2493 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2494 struct ibmvnic_adapter *adapter) 2495 { 2496 struct device *dev = &adapter->vdev->dev; 2497 u8 map_id = crq->request_map_rsp.map_id; 2498 int tx_subcrqs; 2499 int rx_subcrqs; 2500 long rc; 2501 int i; 2502 2503 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2504 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2505 2506 rc = crq->request_map_rsp.rc.code; 2507 if (rc) { 2508 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2509 adapter->map_id--; 2510 /* need to find and zero tx/rx_pool map_id */ 2511 for (i = 0; i < tx_subcrqs; i++) { 2512 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2513 adapter->tx_pool[i].long_term_buff.map_id = 0; 2514 } 2515 for (i = 0; i < rx_subcrqs; i++) { 2516 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2517 adapter->rx_pool[i].long_term_buff.map_id = 0; 2518 } 2519 } 2520 complete(&adapter->fw_done); 2521 } 2522 2523 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2524 struct ibmvnic_adapter *adapter) 2525 { 2526 struct device *dev = &adapter->vdev->dev; 2527 long rc; 2528 2529 rc = crq->request_unmap_rsp.rc.code; 2530 if (rc) 2531 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2532 } 2533 2534 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2535 struct ibmvnic_adapter *adapter) 2536 { 2537 struct net_device *netdev = adapter->netdev; 2538 struct device *dev = &adapter->vdev->dev; 2539 long rc; 2540 2541 rc = crq->query_map_rsp.rc.code; 2542 if (rc) { 2543 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2544 return; 2545 } 2546 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2547 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2548 crq->query_map_rsp.free_pages); 2549 } 2550 2551 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2552 struct ibmvnic_adapter *adapter) 2553 { 2554 struct net_device *netdev = adapter->netdev; 2555 struct device *dev = &adapter->vdev->dev; 2556 long rc; 2557 2558 atomic_dec(&adapter->running_cap_queries); 2559 netdev_dbg(netdev, "Outstanding queries: %d\n", 2560 atomic_read(&adapter->running_cap_queries)); 2561 rc = crq->query_capability.rc.code; 2562 if (rc) { 2563 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2564 goto out; 2565 } 2566 2567 switch (be16_to_cpu(crq->query_capability.capability)) { 2568 case MIN_TX_QUEUES: 2569 adapter->min_tx_queues = 2570 be64_to_cpu(crq->query_capability.number); 2571 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2572 adapter->min_tx_queues); 2573 break; 2574 case MIN_RX_QUEUES: 2575 adapter->min_rx_queues = 2576 be64_to_cpu(crq->query_capability.number); 2577 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2578 adapter->min_rx_queues); 2579 break; 2580 case MIN_RX_ADD_QUEUES: 2581 adapter->min_rx_add_queues = 2582 be64_to_cpu(crq->query_capability.number); 2583 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2584 adapter->min_rx_add_queues); 2585 break; 2586 case MAX_TX_QUEUES: 2587 adapter->max_tx_queues = 2588 be64_to_cpu(crq->query_capability.number); 2589 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2590 adapter->max_tx_queues); 2591 break; 2592 case MAX_RX_QUEUES: 2593 adapter->max_rx_queues = 2594 be64_to_cpu(crq->query_capability.number); 2595 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2596 adapter->max_rx_queues); 2597 break; 2598 case MAX_RX_ADD_QUEUES: 2599 adapter->max_rx_add_queues = 2600 be64_to_cpu(crq->query_capability.number); 2601 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2602 adapter->max_rx_add_queues); 2603 break; 2604 case MIN_TX_ENTRIES_PER_SUBCRQ: 2605 adapter->min_tx_entries_per_subcrq = 2606 be64_to_cpu(crq->query_capability.number); 2607 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2608 adapter->min_tx_entries_per_subcrq); 2609 break; 2610 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2611 adapter->min_rx_add_entries_per_subcrq = 2612 be64_to_cpu(crq->query_capability.number); 2613 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2614 adapter->min_rx_add_entries_per_subcrq); 2615 break; 2616 case MAX_TX_ENTRIES_PER_SUBCRQ: 2617 adapter->max_tx_entries_per_subcrq = 2618 be64_to_cpu(crq->query_capability.number); 2619 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2620 adapter->max_tx_entries_per_subcrq); 2621 break; 2622 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2623 adapter->max_rx_add_entries_per_subcrq = 2624 be64_to_cpu(crq->query_capability.number); 2625 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2626 adapter->max_rx_add_entries_per_subcrq); 2627 break; 2628 case TCP_IP_OFFLOAD: 2629 adapter->tcp_ip_offload = 2630 be64_to_cpu(crq->query_capability.number); 2631 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2632 adapter->tcp_ip_offload); 2633 break; 2634 case PROMISC_SUPPORTED: 2635 adapter->promisc_supported = 2636 be64_to_cpu(crq->query_capability.number); 2637 netdev_dbg(netdev, "promisc_supported = %lld\n", 2638 adapter->promisc_supported); 2639 break; 2640 case MIN_MTU: 2641 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2642 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2643 break; 2644 case MAX_MTU: 2645 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2646 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2647 break; 2648 case MAX_MULTICAST_FILTERS: 2649 adapter->max_multicast_filters = 2650 be64_to_cpu(crq->query_capability.number); 2651 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2652 adapter->max_multicast_filters); 2653 break; 2654 case VLAN_HEADER_INSERTION: 2655 adapter->vlan_header_insertion = 2656 be64_to_cpu(crq->query_capability.number); 2657 if (adapter->vlan_header_insertion) 2658 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2659 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2660 adapter->vlan_header_insertion); 2661 break; 2662 case MAX_TX_SG_ENTRIES: 2663 adapter->max_tx_sg_entries = 2664 be64_to_cpu(crq->query_capability.number); 2665 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2666 adapter->max_tx_sg_entries); 2667 break; 2668 case RX_SG_SUPPORTED: 2669 adapter->rx_sg_supported = 2670 be64_to_cpu(crq->query_capability.number); 2671 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2672 adapter->rx_sg_supported); 2673 break; 2674 case OPT_TX_COMP_SUB_QUEUES: 2675 adapter->opt_tx_comp_sub_queues = 2676 be64_to_cpu(crq->query_capability.number); 2677 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2678 adapter->opt_tx_comp_sub_queues); 2679 break; 2680 case OPT_RX_COMP_QUEUES: 2681 adapter->opt_rx_comp_queues = 2682 be64_to_cpu(crq->query_capability.number); 2683 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2684 adapter->opt_rx_comp_queues); 2685 break; 2686 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2687 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2688 be64_to_cpu(crq->query_capability.number); 2689 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2690 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2691 break; 2692 case OPT_TX_ENTRIES_PER_SUBCRQ: 2693 adapter->opt_tx_entries_per_subcrq = 2694 be64_to_cpu(crq->query_capability.number); 2695 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2696 adapter->opt_tx_entries_per_subcrq); 2697 break; 2698 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2699 adapter->opt_rxba_entries_per_subcrq = 2700 be64_to_cpu(crq->query_capability.number); 2701 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2702 adapter->opt_rxba_entries_per_subcrq); 2703 break; 2704 case TX_RX_DESC_REQ: 2705 adapter->tx_rx_desc_req = crq->query_capability.number; 2706 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2707 adapter->tx_rx_desc_req); 2708 break; 2709 2710 default: 2711 netdev_err(netdev, "Got invalid cap rsp %d\n", 2712 crq->query_capability.capability); 2713 } 2714 2715 out: 2716 if (atomic_read(&adapter->running_cap_queries) == 0) 2717 init_sub_crqs(adapter, 0); 2718 /* We're done querying the capabilities, initialize sub-crqs */ 2719 } 2720 2721 static void handle_control_ras_rsp(union ibmvnic_crq *crq, 2722 struct ibmvnic_adapter *adapter) 2723 { 2724 u8 correlator = crq->control_ras_rsp.correlator; 2725 struct device *dev = &adapter->vdev->dev; 2726 bool found = false; 2727 int i; 2728 2729 if (crq->control_ras_rsp.rc.code) { 2730 dev_warn(dev, "Control ras failed rc=%d\n", 2731 crq->control_ras_rsp.rc.code); 2732 return; 2733 } 2734 2735 for (i = 0; i < adapter->ras_comp_num; i++) { 2736 if (adapter->ras_comps[i].correlator == correlator) { 2737 found = true; 2738 break; 2739 } 2740 } 2741 2742 if (!found) { 2743 dev_warn(dev, "Correlator not found on control_ras_rsp\n"); 2744 return; 2745 } 2746 2747 switch (crq->control_ras_rsp.op) { 2748 case IBMVNIC_TRACE_LEVEL: 2749 adapter->ras_comps[i].trace_level = crq->control_ras.level; 2750 break; 2751 case IBMVNIC_ERROR_LEVEL: 2752 adapter->ras_comps[i].error_check_level = 2753 crq->control_ras.level; 2754 break; 2755 case IBMVNIC_TRACE_PAUSE: 2756 adapter->ras_comp_int[i].paused = 1; 2757 break; 2758 case IBMVNIC_TRACE_RESUME: 2759 adapter->ras_comp_int[i].paused = 0; 2760 break; 2761 case IBMVNIC_TRACE_ON: 2762 adapter->ras_comps[i].trace_on = 1; 2763 break; 2764 case IBMVNIC_TRACE_OFF: 2765 adapter->ras_comps[i].trace_on = 0; 2766 break; 2767 case IBMVNIC_CHG_TRACE_BUFF_SZ: 2768 /* trace_buff_sz is 3 bytes, stuff it into an int */ 2769 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; 2770 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = 2771 crq->control_ras_rsp.trace_buff_sz[0]; 2772 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = 2773 crq->control_ras_rsp.trace_buff_sz[1]; 2774 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = 2775 crq->control_ras_rsp.trace_buff_sz[2]; 2776 break; 2777 default: 2778 dev_err(dev, "invalid op %d on control_ras_rsp", 2779 crq->control_ras_rsp.op); 2780 } 2781 } 2782 2783 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, 2784 loff_t *ppos) 2785 { 2786 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2787 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2788 struct device *dev = &adapter->vdev->dev; 2789 struct ibmvnic_fw_trace_entry *trace; 2790 int num = ras_comp_int->num; 2791 union ibmvnic_crq crq; 2792 dma_addr_t trace_tok; 2793 2794 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2795 return 0; 2796 2797 trace = 2798 dma_alloc_coherent(dev, 2799 be32_to_cpu(adapter->ras_comps[num]. 2800 trace_buff_size), &trace_tok, 2801 GFP_KERNEL); 2802 if (!trace) { 2803 dev_err(dev, "Couldn't alloc trace buffer\n"); 2804 return 0; 2805 } 2806 2807 memset(&crq, 0, sizeof(crq)); 2808 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; 2809 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; 2810 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; 2811 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); 2812 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; 2813 ibmvnic_send_crq(adapter, &crq); 2814 2815 init_completion(&adapter->fw_done); 2816 wait_for_completion(&adapter->fw_done); 2817 2818 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2819 len = 2820 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - 2821 *ppos; 2822 2823 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); 2824 2825 dma_free_coherent(dev, 2826 be32_to_cpu(adapter->ras_comps[num].trace_buff_size), 2827 trace, trace_tok); 2828 *ppos += len; 2829 return len; 2830 } 2831 2832 static const struct file_operations trace_ops = { 2833 .owner = THIS_MODULE, 2834 .open = simple_open, 2835 .read = trace_read, 2836 }; 2837 2838 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, 2839 loff_t *ppos) 2840 { 2841 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2842 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2843 int num = ras_comp_int->num; 2844 char buff[5]; /* 1 or 0 plus \n and \0 */ 2845 int size; 2846 2847 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); 2848 2849 if (*ppos >= size) 2850 return 0; 2851 2852 copy_to_user(user_buf, buff, size); 2853 *ppos += size; 2854 return size; 2855 } 2856 2857 static ssize_t paused_write(struct file *file, const char __user *user_buf, 2858 size_t len, loff_t *ppos) 2859 { 2860 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2861 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2862 int num = ras_comp_int->num; 2863 union ibmvnic_crq crq; 2864 unsigned long val; 2865 char buff[9]; /* decimal max int plus \n and \0 */ 2866 2867 copy_from_user(buff, user_buf, sizeof(buff)); 2868 val = kstrtoul(buff, 10, NULL); 2869 2870 adapter->ras_comp_int[num].paused = val ? 1 : 0; 2871 2872 memset(&crq, 0, sizeof(crq)); 2873 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2874 crq.control_ras.cmd = CONTROL_RAS; 2875 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2876 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; 2877 ibmvnic_send_crq(adapter, &crq); 2878 2879 return len; 2880 } 2881 2882 static const struct file_operations paused_ops = { 2883 .owner = THIS_MODULE, 2884 .open = simple_open, 2885 .read = paused_read, 2886 .write = paused_write, 2887 }; 2888 2889 static ssize_t tracing_read(struct file *file, char __user *user_buf, 2890 size_t len, loff_t *ppos) 2891 { 2892 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2893 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2894 int num = ras_comp_int->num; 2895 char buff[5]; /* 1 or 0 plus \n and \0 */ 2896 int size; 2897 2898 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); 2899 2900 if (*ppos >= size) 2901 return 0; 2902 2903 copy_to_user(user_buf, buff, size); 2904 *ppos += size; 2905 return size; 2906 } 2907 2908 static ssize_t tracing_write(struct file *file, const char __user *user_buf, 2909 size_t len, loff_t *ppos) 2910 { 2911 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2912 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2913 int num = ras_comp_int->num; 2914 union ibmvnic_crq crq; 2915 unsigned long val; 2916 char buff[9]; /* decimal max int plus \n and \0 */ 2917 2918 copy_from_user(buff, user_buf, sizeof(buff)); 2919 val = kstrtoul(buff, 10, NULL); 2920 2921 memset(&crq, 0, sizeof(crq)); 2922 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2923 crq.control_ras.cmd = CONTROL_RAS; 2924 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2925 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; 2926 2927 return len; 2928 } 2929 2930 static const struct file_operations tracing_ops = { 2931 .owner = THIS_MODULE, 2932 .open = simple_open, 2933 .read = tracing_read, 2934 .write = tracing_write, 2935 }; 2936 2937 static ssize_t error_level_read(struct file *file, char __user *user_buf, 2938 size_t len, loff_t *ppos) 2939 { 2940 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2941 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2942 int num = ras_comp_int->num; 2943 char buff[5]; /* decimal max char plus \n and \0 */ 2944 int size; 2945 2946 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); 2947 2948 if (*ppos >= size) 2949 return 0; 2950 2951 copy_to_user(user_buf, buff, size); 2952 *ppos += size; 2953 return size; 2954 } 2955 2956 static ssize_t error_level_write(struct file *file, const char __user *user_buf, 2957 size_t len, loff_t *ppos) 2958 { 2959 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2960 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2961 int num = ras_comp_int->num; 2962 union ibmvnic_crq crq; 2963 unsigned long val; 2964 char buff[9]; /* decimal max int plus \n and \0 */ 2965 2966 copy_from_user(buff, user_buf, sizeof(buff)); 2967 val = kstrtoul(buff, 10, NULL); 2968 2969 if (val > 9) 2970 val = 9; 2971 2972 memset(&crq, 0, sizeof(crq)); 2973 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2974 crq.control_ras.cmd = CONTROL_RAS; 2975 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2976 crq.control_ras.op = IBMVNIC_ERROR_LEVEL; 2977 crq.control_ras.level = val; 2978 ibmvnic_send_crq(adapter, &crq); 2979 2980 return len; 2981 } 2982 2983 static const struct file_operations error_level_ops = { 2984 .owner = THIS_MODULE, 2985 .open = simple_open, 2986 .read = error_level_read, 2987 .write = error_level_write, 2988 }; 2989 2990 static ssize_t trace_level_read(struct file *file, char __user *user_buf, 2991 size_t len, loff_t *ppos) 2992 { 2993 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2994 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2995 int num = ras_comp_int->num; 2996 char buff[5]; /* decimal max char plus \n and \0 */ 2997 int size; 2998 2999 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); 3000 if (*ppos >= size) 3001 return 0; 3002 3003 copy_to_user(user_buf, buff, size); 3004 *ppos += size; 3005 return size; 3006 } 3007 3008 static ssize_t trace_level_write(struct file *file, const char __user *user_buf, 3009 size_t len, loff_t *ppos) 3010 { 3011 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3012 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3013 union ibmvnic_crq crq; 3014 unsigned long val; 3015 char buff[9]; /* decimal max int plus \n and \0 */ 3016 3017 copy_from_user(buff, user_buf, sizeof(buff)); 3018 val = kstrtoul(buff, 10, NULL); 3019 if (val > 9) 3020 val = 9; 3021 3022 memset(&crq, 0, sizeof(crq)); 3023 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3024 crq.control_ras.cmd = CONTROL_RAS; 3025 crq.control_ras.correlator = 3026 adapter->ras_comps[ras_comp_int->num].correlator; 3027 crq.control_ras.op = IBMVNIC_TRACE_LEVEL; 3028 crq.control_ras.level = val; 3029 ibmvnic_send_crq(adapter, &crq); 3030 3031 return len; 3032 } 3033 3034 static const struct file_operations trace_level_ops = { 3035 .owner = THIS_MODULE, 3036 .open = simple_open, 3037 .read = trace_level_read, 3038 .write = trace_level_write, 3039 }; 3040 3041 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, 3042 size_t len, loff_t *ppos) 3043 { 3044 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3045 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3046 int num = ras_comp_int->num; 3047 char buff[9]; /* decimal max int plus \n and \0 */ 3048 int size; 3049 3050 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); 3051 if (*ppos >= size) 3052 return 0; 3053 3054 copy_to_user(user_buf, buff, size); 3055 *ppos += size; 3056 return size; 3057 } 3058 3059 static ssize_t trace_buff_size_write(struct file *file, 3060 const char __user *user_buf, size_t len, 3061 loff_t *ppos) 3062 { 3063 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3064 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3065 union ibmvnic_crq crq; 3066 unsigned long val; 3067 char buff[9]; /* decimal max int plus \n and \0 */ 3068 3069 copy_from_user(buff, user_buf, sizeof(buff)); 3070 val = kstrtoul(buff, 10, NULL); 3071 3072 memset(&crq, 0, sizeof(crq)); 3073 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3074 crq.control_ras.cmd = CONTROL_RAS; 3075 crq.control_ras.correlator = 3076 adapter->ras_comps[ras_comp_int->num].correlator; 3077 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; 3078 /* trace_buff_sz is 3 bytes, stuff an int into it */ 3079 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; 3080 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; 3081 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; 3082 ibmvnic_send_crq(adapter, &crq); 3083 3084 return len; 3085 } 3086 3087 static const struct file_operations trace_size_ops = { 3088 .owner = THIS_MODULE, 3089 .open = simple_open, 3090 .read = trace_buff_size_read, 3091 .write = trace_buff_size_write, 3092 }; 3093 3094 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, 3095 struct ibmvnic_adapter *adapter) 3096 { 3097 struct device *dev = &adapter->vdev->dev; 3098 struct dentry *dir_ent; 3099 struct dentry *ent; 3100 int i; 3101 3102 debugfs_remove_recursive(adapter->ras_comps_ent); 3103 3104 adapter->ras_comps_ent = debugfs_create_dir("ras_comps", 3105 adapter->debugfs_dir); 3106 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { 3107 dev_info(dev, "debugfs create ras_comps dir failed\n"); 3108 return; 3109 } 3110 3111 for (i = 0; i < adapter->ras_comp_num; i++) { 3112 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, 3113 adapter->ras_comps_ent); 3114 if (!dir_ent || IS_ERR(dir_ent)) { 3115 dev_info(dev, "debugfs create %s dir failed\n", 3116 adapter->ras_comps[i].name); 3117 continue; 3118 } 3119 3120 adapter->ras_comp_int[i].adapter = adapter; 3121 adapter->ras_comp_int[i].num = i; 3122 adapter->ras_comp_int[i].desc_blob.data = 3123 &adapter->ras_comps[i].description; 3124 adapter->ras_comp_int[i].desc_blob.size = 3125 sizeof(adapter->ras_comps[i].description); 3126 3127 /* Don't need to remember the dentry's because the debugfs dir 3128 * gets removed recursively 3129 */ 3130 ent = debugfs_create_blob("description", S_IRUGO, dir_ent, 3131 &adapter->ras_comp_int[i].desc_blob); 3132 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, 3133 dir_ent, &adapter->ras_comp_int[i], 3134 &trace_size_ops); 3135 ent = debugfs_create_file("trace_level", 3136 S_IRUGO | 3137 (adapter->ras_comps[i].trace_level != 3138 0xFF ? S_IWUSR : 0), 3139 dir_ent, &adapter->ras_comp_int[i], 3140 &trace_level_ops); 3141 ent = debugfs_create_file("error_level", 3142 S_IRUGO | 3143 (adapter-> 3144 ras_comps[i].error_check_level != 3145 0xFF ? S_IWUSR : 0), 3146 dir_ent, &adapter->ras_comp_int[i], 3147 &trace_level_ops); 3148 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, 3149 dir_ent, &adapter->ras_comp_int[i], 3150 &tracing_ops); 3151 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, 3152 dir_ent, &adapter->ras_comp_int[i], 3153 &paused_ops); 3154 ent = debugfs_create_file("trace", S_IRUGO, dir_ent, 3155 &adapter->ras_comp_int[i], 3156 &trace_ops); 3157 } 3158 } 3159 3160 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, 3161 struct ibmvnic_adapter *adapter) 3162 { 3163 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); 3164 struct device *dev = &adapter->vdev->dev; 3165 union ibmvnic_crq newcrq; 3166 3167 adapter->ras_comps = dma_alloc_coherent(dev, len, 3168 &adapter->ras_comps_tok, 3169 GFP_KERNEL); 3170 if (!adapter->ras_comps) { 3171 if (!firmware_has_feature(FW_FEATURE_CMO)) 3172 dev_err(dev, "Couldn't alloc fw comps buffer\n"); 3173 return; 3174 } 3175 3176 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * 3177 sizeof(struct ibmvnic_fw_comp_internal), 3178 GFP_KERNEL); 3179 if (!adapter->ras_comp_int) 3180 dma_free_coherent(dev, len, adapter->ras_comps, 3181 adapter->ras_comps_tok); 3182 3183 memset(&newcrq, 0, sizeof(newcrq)); 3184 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; 3185 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; 3186 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); 3187 newcrq.request_ras_comps.len = cpu_to_be32(len); 3188 ibmvnic_send_crq(adapter, &newcrq); 3189 } 3190 3191 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) 3192 { 3193 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; 3194 struct device *dev = &adapter->vdev->dev; 3195 struct ibmvnic_error_buff *error_buff, *tmp2; 3196 unsigned long flags; 3197 unsigned long flags2; 3198 3199 spin_lock_irqsave(&adapter->inflight_lock, flags); 3200 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { 3201 switch (inflight_cmd->crq.generic.cmd) { 3202 case LOGIN: 3203 dma_unmap_single(dev, adapter->login_buf_token, 3204 adapter->login_buf_sz, 3205 DMA_BIDIRECTIONAL); 3206 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3207 adapter->login_rsp_buf_sz, 3208 DMA_BIDIRECTIONAL); 3209 kfree(adapter->login_rsp_buf); 3210 kfree(adapter->login_buf); 3211 break; 3212 case REQUEST_DUMP: 3213 complete(&adapter->fw_done); 3214 break; 3215 case REQUEST_ERROR_INFO: 3216 spin_lock_irqsave(&adapter->error_list_lock, flags2); 3217 list_for_each_entry_safe(error_buff, tmp2, 3218 &adapter->errors, list) { 3219 dma_unmap_single(dev, error_buff->dma, 3220 error_buff->len, 3221 DMA_FROM_DEVICE); 3222 kfree(error_buff->buff); 3223 list_del(&error_buff->list); 3224 kfree(error_buff); 3225 } 3226 spin_unlock_irqrestore(&adapter->error_list_lock, 3227 flags2); 3228 break; 3229 } 3230 list_del(&inflight_cmd->list); 3231 kfree(inflight_cmd); 3232 } 3233 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 3234 } 3235 3236 static void ibmvnic_xport_event(struct work_struct *work) 3237 { 3238 struct ibmvnic_adapter *adapter = container_of(work, 3239 struct ibmvnic_adapter, 3240 ibmvnic_xport); 3241 struct device *dev = &adapter->vdev->dev; 3242 long rc; 3243 3244 ibmvnic_free_inflight(adapter); 3245 release_sub_crqs(adapter); 3246 if (adapter->migrated) { 3247 rc = ibmvnic_reenable_crq_queue(adapter); 3248 if (rc) 3249 dev_err(dev, "Error after enable rc=%ld\n", rc); 3250 adapter->migrated = false; 3251 rc = ibmvnic_send_crq_init(adapter); 3252 if (rc) 3253 dev_err(dev, "Error sending init rc=%ld\n", rc); 3254 } 3255 } 3256 3257 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3258 struct ibmvnic_adapter *adapter) 3259 { 3260 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3261 struct net_device *netdev = adapter->netdev; 3262 struct device *dev = &adapter->vdev->dev; 3263 long rc; 3264 3265 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3266 ((unsigned long int *)crq)[0], 3267 ((unsigned long int *)crq)[1]); 3268 switch (gen_crq->first) { 3269 case IBMVNIC_CRQ_INIT_RSP: 3270 switch (gen_crq->cmd) { 3271 case IBMVNIC_CRQ_INIT: 3272 dev_info(dev, "Partner initialized\n"); 3273 /* Send back a response */ 3274 rc = ibmvnic_send_crq_init_complete(adapter); 3275 if (!rc) 3276 schedule_work(&adapter->vnic_crq_init); 3277 else 3278 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 3279 break; 3280 case IBMVNIC_CRQ_INIT_COMPLETE: 3281 dev_info(dev, "Partner initialization complete\n"); 3282 send_version_xchg(adapter); 3283 break; 3284 default: 3285 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3286 } 3287 return; 3288 case IBMVNIC_CRQ_XPORT_EVENT: 3289 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3290 dev_info(dev, "Re-enabling adapter\n"); 3291 adapter->migrated = true; 3292 schedule_work(&adapter->ibmvnic_xport); 3293 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3294 dev_info(dev, "Backing device failover detected\n"); 3295 netif_carrier_off(netdev); 3296 adapter->failover = true; 3297 } else { 3298 /* The adapter lost the connection */ 3299 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3300 gen_crq->cmd); 3301 schedule_work(&adapter->ibmvnic_xport); 3302 } 3303 return; 3304 case IBMVNIC_CRQ_CMD_RSP: 3305 break; 3306 default: 3307 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3308 gen_crq->first); 3309 return; 3310 } 3311 3312 switch (gen_crq->cmd) { 3313 case VERSION_EXCHANGE_RSP: 3314 rc = crq->version_exchange_rsp.rc.code; 3315 if (rc) { 3316 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3317 break; 3318 } 3319 dev_info(dev, "Partner protocol version is %d\n", 3320 crq->version_exchange_rsp.version); 3321 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3322 ibmvnic_version) 3323 ibmvnic_version = 3324 be16_to_cpu(crq->version_exchange_rsp.version); 3325 send_cap_queries(adapter); 3326 break; 3327 case QUERY_CAPABILITY_RSP: 3328 handle_query_cap_rsp(crq, adapter); 3329 break; 3330 case QUERY_MAP_RSP: 3331 handle_query_map_rsp(crq, adapter); 3332 break; 3333 case REQUEST_MAP_RSP: 3334 handle_request_map_rsp(crq, adapter); 3335 break; 3336 case REQUEST_UNMAP_RSP: 3337 handle_request_unmap_rsp(crq, adapter); 3338 break; 3339 case REQUEST_CAPABILITY_RSP: 3340 handle_request_cap_rsp(crq, adapter); 3341 break; 3342 case LOGIN_RSP: 3343 netdev_dbg(netdev, "Got Login Response\n"); 3344 handle_login_rsp(crq, adapter); 3345 break; 3346 case LOGICAL_LINK_STATE_RSP: 3347 netdev_dbg(netdev, "Got Logical Link State Response\n"); 3348 adapter->logical_link_state = 3349 crq->logical_link_state_rsp.link_state; 3350 break; 3351 case LINK_STATE_INDICATION: 3352 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3353 adapter->phys_link_state = 3354 crq->link_state_indication.phys_link_state; 3355 adapter->logical_link_state = 3356 crq->link_state_indication.logical_link_state; 3357 break; 3358 case CHANGE_MAC_ADDR_RSP: 3359 netdev_dbg(netdev, "Got MAC address change Response\n"); 3360 handle_change_mac_rsp(crq, adapter); 3361 break; 3362 case ERROR_INDICATION: 3363 netdev_dbg(netdev, "Got Error Indication\n"); 3364 handle_error_indication(crq, adapter); 3365 break; 3366 case REQUEST_ERROR_RSP: 3367 netdev_dbg(netdev, "Got Error Detail Response\n"); 3368 handle_error_info_rsp(crq, adapter); 3369 break; 3370 case REQUEST_STATISTICS_RSP: 3371 netdev_dbg(netdev, "Got Statistics Response\n"); 3372 complete(&adapter->stats_done); 3373 break; 3374 case REQUEST_DUMP_SIZE_RSP: 3375 netdev_dbg(netdev, "Got Request Dump Size Response\n"); 3376 handle_dump_size_rsp(crq, adapter); 3377 break; 3378 case REQUEST_DUMP_RSP: 3379 netdev_dbg(netdev, "Got Request Dump Response\n"); 3380 complete(&adapter->fw_done); 3381 break; 3382 case QUERY_IP_OFFLOAD_RSP: 3383 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3384 handle_query_ip_offload_rsp(adapter); 3385 break; 3386 case MULTICAST_CTRL_RSP: 3387 netdev_dbg(netdev, "Got multicast control Response\n"); 3388 break; 3389 case CONTROL_IP_OFFLOAD_RSP: 3390 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3391 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3392 sizeof(adapter->ip_offload_ctrl), 3393 DMA_TO_DEVICE); 3394 /* We're done with the queries, perform the login */ 3395 send_login(adapter); 3396 break; 3397 case REQUEST_RAS_COMP_NUM_RSP: 3398 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); 3399 if (crq->request_ras_comp_num_rsp.rc.code == 10) { 3400 netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); 3401 break; 3402 } 3403 adapter->ras_comp_num = 3404 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); 3405 handle_request_ras_comp_num_rsp(crq, adapter); 3406 break; 3407 case REQUEST_RAS_COMPS_RSP: 3408 netdev_dbg(netdev, "Got Request RAS Comps Response\n"); 3409 handle_request_ras_comps_rsp(crq, adapter); 3410 break; 3411 case CONTROL_RAS_RSP: 3412 netdev_dbg(netdev, "Got Control RAS Response\n"); 3413 handle_control_ras_rsp(crq, adapter); 3414 break; 3415 case COLLECT_FW_TRACE_RSP: 3416 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3417 complete(&adapter->fw_done); 3418 break; 3419 default: 3420 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3421 gen_crq->cmd); 3422 } 3423 } 3424 3425 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3426 { 3427 struct ibmvnic_adapter *adapter = instance; 3428 struct ibmvnic_crq_queue *queue = &adapter->crq; 3429 struct vio_dev *vdev = adapter->vdev; 3430 union ibmvnic_crq *crq; 3431 unsigned long flags; 3432 bool done = false; 3433 3434 spin_lock_irqsave(&queue->lock, flags); 3435 vio_disable_interrupts(vdev); 3436 while (!done) { 3437 /* Pull all the valid messages off the CRQ */ 3438 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3439 ibmvnic_handle_crq(crq, adapter); 3440 crq->generic.first = 0; 3441 } 3442 vio_enable_interrupts(vdev); 3443 crq = ibmvnic_next_crq(adapter); 3444 if (crq) { 3445 vio_disable_interrupts(vdev); 3446 ibmvnic_handle_crq(crq, adapter); 3447 crq->generic.first = 0; 3448 } else { 3449 done = true; 3450 } 3451 } 3452 spin_unlock_irqrestore(&queue->lock, flags); 3453 return IRQ_HANDLED; 3454 } 3455 3456 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3457 { 3458 struct vio_dev *vdev = adapter->vdev; 3459 int rc; 3460 3461 do { 3462 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3463 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3464 3465 if (rc) 3466 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3467 3468 return rc; 3469 } 3470 3471 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3472 { 3473 struct ibmvnic_crq_queue *crq = &adapter->crq; 3474 struct device *dev = &adapter->vdev->dev; 3475 struct vio_dev *vdev = adapter->vdev; 3476 int rc; 3477 3478 /* Close the CRQ */ 3479 do { 3480 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3481 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3482 3483 /* Clean out the queue */ 3484 memset(crq->msgs, 0, PAGE_SIZE); 3485 crq->cur = 0; 3486 3487 /* And re-open it again */ 3488 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3489 crq->msg_token, PAGE_SIZE); 3490 3491 if (rc == H_CLOSED) 3492 /* Adapter is good, but other end is not ready */ 3493 dev_warn(dev, "Partner adapter not ready\n"); 3494 else if (rc != 0) 3495 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3496 3497 return rc; 3498 } 3499 3500 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) 3501 { 3502 struct ibmvnic_crq_queue *crq = &adapter->crq; 3503 struct vio_dev *vdev = adapter->vdev; 3504 long rc; 3505 3506 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3507 free_irq(vdev->irq, adapter); 3508 do { 3509 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3510 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3511 3512 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3513 DMA_BIDIRECTIONAL); 3514 free_page((unsigned long)crq->msgs); 3515 } 3516 3517 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) 3518 { 3519 struct ibmvnic_crq_queue *crq = &adapter->crq; 3520 struct device *dev = &adapter->vdev->dev; 3521 struct vio_dev *vdev = adapter->vdev; 3522 int rc, retrc = -ENOMEM; 3523 3524 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3525 /* Should we allocate more than one page? */ 3526 3527 if (!crq->msgs) 3528 return -ENOMEM; 3529 3530 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3531 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3532 DMA_BIDIRECTIONAL); 3533 if (dma_mapping_error(dev, crq->msg_token)) 3534 goto map_failed; 3535 3536 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3537 crq->msg_token, PAGE_SIZE); 3538 3539 if (rc == H_RESOURCE) 3540 /* maybe kexecing and resource is busy. try a reset */ 3541 rc = ibmvnic_reset_crq(adapter); 3542 retrc = rc; 3543 3544 if (rc == H_CLOSED) { 3545 dev_warn(dev, "Partner adapter not ready\n"); 3546 } else if (rc) { 3547 dev_warn(dev, "Error %d opening adapter\n", rc); 3548 goto reg_crq_failed; 3549 } 3550 3551 retrc = 0; 3552 3553 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3554 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3555 adapter); 3556 if (rc) { 3557 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3558 vdev->irq, rc); 3559 goto req_irq_failed; 3560 } 3561 3562 rc = vio_enable_interrupts(vdev); 3563 if (rc) { 3564 dev_err(dev, "Error %d enabling interrupts\n", rc); 3565 goto req_irq_failed; 3566 } 3567 3568 crq->cur = 0; 3569 spin_lock_init(&crq->lock); 3570 3571 return retrc; 3572 3573 req_irq_failed: 3574 do { 3575 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3576 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3577 reg_crq_failed: 3578 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3579 map_failed: 3580 free_page((unsigned long)crq->msgs); 3581 return retrc; 3582 } 3583 3584 /* debugfs for dump */ 3585 static int ibmvnic_dump_show(struct seq_file *seq, void *v) 3586 { 3587 struct net_device *netdev = seq->private; 3588 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3589 struct device *dev = &adapter->vdev->dev; 3590 union ibmvnic_crq crq; 3591 3592 memset(&crq, 0, sizeof(crq)); 3593 crq.request_dump_size.first = IBMVNIC_CRQ_CMD; 3594 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; 3595 ibmvnic_send_crq(adapter, &crq); 3596 3597 init_completion(&adapter->fw_done); 3598 wait_for_completion(&adapter->fw_done); 3599 3600 seq_write(seq, adapter->dump_data, adapter->dump_data_size); 3601 3602 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, 3603 DMA_BIDIRECTIONAL); 3604 3605 kfree(adapter->dump_data); 3606 3607 return 0; 3608 } 3609 3610 static int ibmvnic_dump_open(struct inode *inode, struct file *file) 3611 { 3612 return single_open(file, ibmvnic_dump_show, inode->i_private); 3613 } 3614 3615 static const struct file_operations ibmvnic_dump_ops = { 3616 .owner = THIS_MODULE, 3617 .open = ibmvnic_dump_open, 3618 .read = seq_read, 3619 .llseek = seq_lseek, 3620 .release = single_release, 3621 }; 3622 3623 static void handle_crq_init_rsp(struct work_struct *work) 3624 { 3625 struct ibmvnic_adapter *adapter = container_of(work, 3626 struct ibmvnic_adapter, 3627 vnic_crq_init); 3628 struct device *dev = &adapter->vdev->dev; 3629 struct net_device *netdev = adapter->netdev; 3630 unsigned long timeout = msecs_to_jiffies(30000); 3631 bool restart = false; 3632 int rc; 3633 3634 if (adapter->failover) { 3635 release_sub_crqs(adapter); 3636 if (netif_running(netdev)) { 3637 netif_tx_disable(netdev); 3638 ibmvnic_close(netdev); 3639 restart = true; 3640 } 3641 } 3642 3643 send_version_xchg(adapter); 3644 reinit_completion(&adapter->init_done); 3645 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3646 dev_err(dev, "Passive init timeout\n"); 3647 goto task_failed; 3648 } 3649 3650 do { 3651 if (adapter->renegotiate) { 3652 adapter->renegotiate = false; 3653 release_sub_crqs_no_irqs(adapter); 3654 send_cap_queries(adapter); 3655 3656 reinit_completion(&adapter->init_done); 3657 if (!wait_for_completion_timeout(&adapter->init_done, 3658 timeout)) { 3659 dev_err(dev, "Passive init timeout\n"); 3660 goto task_failed; 3661 } 3662 } 3663 } while (adapter->renegotiate); 3664 rc = init_sub_crq_irqs(adapter); 3665 3666 if (rc) 3667 goto task_failed; 3668 3669 netdev->real_num_tx_queues = adapter->req_tx_queues; 3670 netdev->mtu = adapter->req_mtu; 3671 3672 if (adapter->failover) { 3673 adapter->failover = false; 3674 if (restart) { 3675 rc = ibmvnic_open(netdev); 3676 if (rc) 3677 goto restart_failed; 3678 } 3679 netif_carrier_on(netdev); 3680 return; 3681 } 3682 3683 rc = register_netdev(netdev); 3684 if (rc) { 3685 dev_err(dev, 3686 "failed to register netdev rc=%d\n", rc); 3687 goto register_failed; 3688 } 3689 dev_info(dev, "ibmvnic registered\n"); 3690 3691 return; 3692 3693 restart_failed: 3694 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3695 register_failed: 3696 release_sub_crqs(adapter); 3697 task_failed: 3698 dev_err(dev, "Passive initialization was not successful\n"); 3699 } 3700 3701 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3702 { 3703 unsigned long timeout = msecs_to_jiffies(30000); 3704 struct ibmvnic_adapter *adapter; 3705 struct net_device *netdev; 3706 unsigned char *mac_addr_p; 3707 struct dentry *ent; 3708 char buf[17]; /* debugfs name buf */ 3709 int rc; 3710 3711 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3712 dev->unit_address); 3713 3714 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3715 VETH_MAC_ADDR, NULL); 3716 if (!mac_addr_p) { 3717 dev_err(&dev->dev, 3718 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3719 __FILE__, __LINE__); 3720 return 0; 3721 } 3722 3723 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3724 IBMVNIC_MAX_TX_QUEUES); 3725 if (!netdev) 3726 return -ENOMEM; 3727 3728 adapter = netdev_priv(netdev); 3729 dev_set_drvdata(&dev->dev, netdev); 3730 adapter->vdev = dev; 3731 adapter->netdev = netdev; 3732 adapter->failover = false; 3733 3734 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3735 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3736 netdev->irq = dev->irq; 3737 netdev->netdev_ops = &ibmvnic_netdev_ops; 3738 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3739 SET_NETDEV_DEV(netdev, &dev->dev); 3740 3741 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3742 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3743 3744 spin_lock_init(&adapter->stats_lock); 3745 3746 rc = ibmvnic_init_crq_queue(adapter); 3747 if (rc) { 3748 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); 3749 goto free_netdev; 3750 } 3751 3752 INIT_LIST_HEAD(&adapter->errors); 3753 INIT_LIST_HEAD(&adapter->inflight); 3754 spin_lock_init(&adapter->error_list_lock); 3755 spin_lock_init(&adapter->inflight_lock); 3756 3757 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, 3758 sizeof(struct ibmvnic_statistics), 3759 DMA_FROM_DEVICE); 3760 if (dma_mapping_error(&dev->dev, adapter->stats_token)) { 3761 if (!firmware_has_feature(FW_FEATURE_CMO)) 3762 dev_err(&dev->dev, "Couldn't map stats buffer\n"); 3763 rc = -ENOMEM; 3764 goto free_crq; 3765 } 3766 3767 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); 3768 ent = debugfs_create_dir(buf, NULL); 3769 if (!ent || IS_ERR(ent)) { 3770 dev_info(&dev->dev, "debugfs create directory failed\n"); 3771 adapter->debugfs_dir = NULL; 3772 } else { 3773 adapter->debugfs_dir = ent; 3774 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, 3775 netdev, &ibmvnic_dump_ops); 3776 if (!ent || IS_ERR(ent)) { 3777 dev_info(&dev->dev, 3778 "debugfs create dump file failed\n"); 3779 adapter->debugfs_dump = NULL; 3780 } else { 3781 adapter->debugfs_dump = ent; 3782 } 3783 } 3784 ibmvnic_send_crq_init(adapter); 3785 3786 init_completion(&adapter->init_done); 3787 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) 3788 return 0; 3789 3790 do { 3791 if (adapter->renegotiate) { 3792 adapter->renegotiate = false; 3793 release_sub_crqs_no_irqs(adapter); 3794 send_cap_queries(adapter); 3795 3796 reinit_completion(&adapter->init_done); 3797 if (!wait_for_completion_timeout(&adapter->init_done, 3798 timeout)) 3799 return 0; 3800 } 3801 } while (adapter->renegotiate); 3802 3803 rc = init_sub_crq_irqs(adapter); 3804 if (rc) { 3805 dev_err(&dev->dev, "failed to initialize sub crq irqs\n"); 3806 goto free_debugfs; 3807 } 3808 3809 netdev->real_num_tx_queues = adapter->req_tx_queues; 3810 netdev->mtu = adapter->req_mtu; 3811 3812 rc = register_netdev(netdev); 3813 if (rc) { 3814 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3815 goto free_sub_crqs; 3816 } 3817 dev_info(&dev->dev, "ibmvnic registered\n"); 3818 3819 return 0; 3820 3821 free_sub_crqs: 3822 release_sub_crqs(adapter); 3823 free_debugfs: 3824 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3825 debugfs_remove_recursive(adapter->debugfs_dir); 3826 free_crq: 3827 ibmvnic_release_crq_queue(adapter); 3828 free_netdev: 3829 free_netdev(netdev); 3830 return rc; 3831 } 3832 3833 static int ibmvnic_remove(struct vio_dev *dev) 3834 { 3835 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3837 3838 unregister_netdev(netdev); 3839 3840 release_sub_crqs(adapter); 3841 3842 ibmvnic_release_crq_queue(adapter); 3843 3844 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3845 debugfs_remove_recursive(adapter->debugfs_dir); 3846 3847 dma_unmap_single(&dev->dev, adapter->stats_token, 3848 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); 3849 3850 if (adapter->ras_comps) 3851 dma_free_coherent(&dev->dev, 3852 adapter->ras_comp_num * 3853 sizeof(struct ibmvnic_fw_component), 3854 adapter->ras_comps, adapter->ras_comps_tok); 3855 3856 kfree(adapter->ras_comp_int); 3857 3858 free_netdev(netdev); 3859 dev_set_drvdata(&dev->dev, NULL); 3860 3861 return 0; 3862 } 3863 3864 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3865 { 3866 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3867 struct ibmvnic_adapter *adapter; 3868 struct iommu_table *tbl; 3869 unsigned long ret = 0; 3870 int i; 3871 3872 tbl = get_iommu_table_base(&vdev->dev); 3873 3874 /* netdev inits at probe time along with the structures we need below*/ 3875 if (!netdev) 3876 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3877 3878 adapter = netdev_priv(netdev); 3879 3880 ret += PAGE_SIZE; /* the crq message queue */ 3881 ret += adapter->bounce_buffer_size; 3882 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3883 3884 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3885 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3886 3887 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3888 i++) 3889 ret += adapter->rx_pool[i].size * 3890 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3891 3892 return ret; 3893 } 3894 3895 static int ibmvnic_resume(struct device *dev) 3896 { 3897 struct net_device *netdev = dev_get_drvdata(dev); 3898 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3899 int i; 3900 3901 /* kick the interrupt handlers just in case we lost an interrupt */ 3902 for (i = 0; i < adapter->req_rx_queues; i++) 3903 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3904 adapter->rx_scrq[i]); 3905 3906 return 0; 3907 } 3908 3909 static struct vio_device_id ibmvnic_device_table[] = { 3910 {"network", "IBM,vnic"}, 3911 {"", "" } 3912 }; 3913 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3914 3915 static const struct dev_pm_ops ibmvnic_pm_ops = { 3916 .resume = ibmvnic_resume 3917 }; 3918 3919 static struct vio_driver ibmvnic_driver = { 3920 .id_table = ibmvnic_device_table, 3921 .probe = ibmvnic_probe, 3922 .remove = ibmvnic_remove, 3923 .get_desired_dma = ibmvnic_get_desired_dma, 3924 .name = ibmvnic_driver_name, 3925 .pm = &ibmvnic_pm_ops, 3926 }; 3927 3928 /* module functions */ 3929 static int __init ibmvnic_module_init(void) 3930 { 3931 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3932 IBMVNIC_DRIVER_VERSION); 3933 3934 return vio_register_driver(&ibmvnic_driver); 3935 } 3936 3937 static void __exit ibmvnic_module_exit(void) 3938 { 3939 vio_unregister_driver(&ibmvnic_driver); 3940 } 3941 3942 module_init(ibmvnic_module_init); 3943 module_exit(ibmvnic_module_exit); 3944