1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/in.h> 63 #include <linux/ip.h> 64 #include <linux/ipv6.h> 65 #include <linux/irq.h> 66 #include <linux/kthread.h> 67 #include <linux/seq_file.h> 68 #include <linux/debugfs.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 79 #include "ibmvnic.h" 80 81 static const char ibmvnic_driver_name[] = "ibmvnic"; 82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 83 84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); 85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 86 MODULE_LICENSE("GPL"); 87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 88 89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 90 static int ibmvnic_remove(struct vio_dev *); 91 static void release_sub_crqs(struct ibmvnic_adapter *); 92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *); 93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 98 union sub_crq *sub_crq); 99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 101 static int enable_scrq_irq(struct ibmvnic_adapter *, 102 struct ibmvnic_sub_crq_queue *); 103 static int disable_scrq_irq(struct ibmvnic_adapter *, 104 struct ibmvnic_sub_crq_queue *); 105 static int pending_scrq(struct ibmvnic_adapter *, 106 struct ibmvnic_sub_crq_queue *); 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 108 struct ibmvnic_sub_crq_queue *); 109 static int ibmvnic_poll(struct napi_struct *napi, int data); 110 static void send_map_query(struct ibmvnic_adapter *adapter); 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 112 static void send_request_unmap(struct ibmvnic_adapter *, u8); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 149 unsigned long length, unsigned long *number, 150 unsigned long *irq) 151 { 152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 153 long rc; 154 155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 156 *number = retbuf[0]; 157 *irq = retbuf[1]; 158 159 return rc; 160 } 161 162 /* net_device_ops functions */ 163 164 static void init_rx_pool(struct ibmvnic_adapter *adapter, 165 struct ibmvnic_rx_pool *rx_pool, int num, int index, 166 int buff_size, int active) 167 { 168 netdev_dbg(adapter->netdev, 169 "Initializing rx_pool %d, %d buffs, %d bytes each\n", 170 index, num, buff_size); 171 rx_pool->size = num; 172 rx_pool->index = index; 173 rx_pool->buff_size = buff_size; 174 rx_pool->active = active; 175 } 176 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 178 struct ibmvnic_long_term_buff *ltb, int size) 179 { 180 struct device *dev = &adapter->vdev->dev; 181 182 ltb->size = size; 183 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 184 GFP_KERNEL); 185 186 if (!ltb->buff) { 187 dev_err(dev, "Couldn't alloc long term buffer\n"); 188 return -ENOMEM; 189 } 190 ltb->map_id = adapter->map_id; 191 adapter->map_id++; 192 send_request_map(adapter, ltb->addr, 193 ltb->size, ltb->map_id); 194 init_completion(&adapter->fw_done); 195 wait_for_completion(&adapter->fw_done); 196 return 0; 197 } 198 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 200 struct ibmvnic_long_term_buff *ltb) 201 { 202 struct device *dev = &adapter->vdev->dev; 203 204 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 205 if (!adapter->failover) 206 send_request_unmap(adapter, ltb->map_id); 207 } 208 209 static int alloc_rx_pool(struct ibmvnic_adapter *adapter, 210 struct ibmvnic_rx_pool *pool) 211 { 212 struct device *dev = &adapter->vdev->dev; 213 int i; 214 215 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL); 216 if (!pool->free_map) 217 return -ENOMEM; 218 219 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff), 220 GFP_KERNEL); 221 222 if (!pool->rx_buff) { 223 dev_err(dev, "Couldn't alloc rx buffers\n"); 224 kfree(pool->free_map); 225 return -ENOMEM; 226 } 227 228 if (alloc_long_term_buff(adapter, &pool->long_term_buff, 229 pool->size * pool->buff_size)) { 230 kfree(pool->free_map); 231 kfree(pool->rx_buff); 232 return -ENOMEM; 233 } 234 235 for (i = 0; i < pool->size; ++i) 236 pool->free_map[i] = i; 237 238 atomic_set(&pool->available, 0); 239 pool->next_alloc = 0; 240 pool->next_free = 0; 241 242 return 0; 243 } 244 245 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 246 struct ibmvnic_rx_pool *pool) 247 { 248 int count = pool->size - atomic_read(&pool->available); 249 struct device *dev = &adapter->vdev->dev; 250 int buffers_added = 0; 251 unsigned long lpar_rc; 252 union sub_crq sub_crq; 253 struct sk_buff *skb; 254 unsigned int offset; 255 dma_addr_t dma_addr; 256 unsigned char *dst; 257 u64 *handle_array; 258 int shift = 0; 259 int index; 260 int i; 261 262 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 263 be32_to_cpu(adapter->login_rsp_buf-> 264 off_rxadd_subcrqs)); 265 266 for (i = 0; i < count; ++i) { 267 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 268 if (!skb) { 269 dev_err(dev, "Couldn't replenish rx buff\n"); 270 adapter->replenish_no_mem++; 271 break; 272 } 273 274 index = pool->free_map[pool->next_free]; 275 276 if (pool->rx_buff[index].skb) 277 dev_err(dev, "Inconsistent free_map!\n"); 278 279 /* Copy the skb to the long term mapped DMA buffer */ 280 offset = index * pool->buff_size; 281 dst = pool->long_term_buff.buff + offset; 282 memset(dst, 0, pool->buff_size); 283 dma_addr = pool->long_term_buff.addr + offset; 284 pool->rx_buff[index].data = dst; 285 286 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 287 pool->rx_buff[index].dma = dma_addr; 288 pool->rx_buff[index].skb = skb; 289 pool->rx_buff[index].pool_index = pool->index; 290 pool->rx_buff[index].size = pool->buff_size; 291 292 memset(&sub_crq, 0, sizeof(sub_crq)); 293 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 294 sub_crq.rx_add.correlator = 295 cpu_to_be64((u64)&pool->rx_buff[index]); 296 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 297 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 298 299 /* The length field of the sCRQ is defined to be 24 bits so the 300 * buffer size needs to be left shifted by a byte before it is 301 * converted to big endian to prevent the last byte from being 302 * truncated. 303 */ 304 #ifdef __LITTLE_ENDIAN__ 305 shift = 8; 306 #endif 307 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 308 309 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 310 &sub_crq); 311 if (lpar_rc != H_SUCCESS) 312 goto failure; 313 314 buffers_added++; 315 adapter->replenish_add_buff_success++; 316 pool->next_free = (pool->next_free + 1) % pool->size; 317 } 318 atomic_add(buffers_added, &pool->available); 319 return; 320 321 failure: 322 dev_info(dev, "replenish pools failure\n"); 323 pool->free_map[pool->next_free] = index; 324 pool->rx_buff[index].skb = NULL; 325 if (!dma_mapping_error(dev, dma_addr)) 326 dma_unmap_single(dev, dma_addr, pool->buff_size, 327 DMA_FROM_DEVICE); 328 329 dev_kfree_skb_any(skb); 330 adapter->replenish_add_buff_failure++; 331 atomic_add(buffers_added, &pool->available); 332 } 333 334 static void replenish_pools(struct ibmvnic_adapter *adapter) 335 { 336 int i; 337 338 if (adapter->migrated) 339 return; 340 341 adapter->replenish_task_cycles++; 342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 343 i++) { 344 if (adapter->rx_pool[i].active) 345 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 346 } 347 } 348 349 static void free_rx_pool(struct ibmvnic_adapter *adapter, 350 struct ibmvnic_rx_pool *pool) 351 { 352 int i; 353 354 kfree(pool->free_map); 355 pool->free_map = NULL; 356 357 if (!pool->rx_buff) 358 return; 359 360 for (i = 0; i < pool->size; i++) { 361 if (pool->rx_buff[i].skb) { 362 dev_kfree_skb_any(pool->rx_buff[i].skb); 363 pool->rx_buff[i].skb = NULL; 364 } 365 } 366 kfree(pool->rx_buff); 367 pool->rx_buff = NULL; 368 } 369 370 static int ibmvnic_open(struct net_device *netdev) 371 { 372 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 373 struct device *dev = &adapter->vdev->dev; 374 struct ibmvnic_tx_pool *tx_pool; 375 union ibmvnic_crq crq; 376 int rxadd_subcrqs; 377 u64 *size_array; 378 int tx_subcrqs; 379 int i, j; 380 381 rxadd_subcrqs = 382 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 383 tx_subcrqs = 384 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 385 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 386 be32_to_cpu(adapter->login_rsp_buf-> 387 off_rxadd_buff_size)); 388 adapter->map_id = 1; 389 adapter->napi = kcalloc(adapter->req_rx_queues, 390 sizeof(struct napi_struct), GFP_KERNEL); 391 if (!adapter->napi) 392 goto alloc_napi_failed; 393 for (i = 0; i < adapter->req_rx_queues; i++) { 394 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 395 NAPI_POLL_WEIGHT); 396 napi_enable(&adapter->napi[i]); 397 } 398 adapter->rx_pool = 399 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); 400 401 if (!adapter->rx_pool) 402 goto rx_pool_arr_alloc_failed; 403 send_map_query(adapter); 404 for (i = 0; i < rxadd_subcrqs; i++) { 405 init_rx_pool(adapter, &adapter->rx_pool[i], 406 IBMVNIC_BUFFS_PER_POOL, i, 407 be64_to_cpu(size_array[i]), 1); 408 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) { 409 dev_err(dev, "Couldn't alloc rx pool\n"); 410 goto rx_pool_alloc_failed; 411 } 412 } 413 adapter->tx_pool = 414 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 415 416 if (!adapter->tx_pool) 417 goto tx_pool_arr_alloc_failed; 418 for (i = 0; i < tx_subcrqs; i++) { 419 tx_pool = &adapter->tx_pool[i]; 420 tx_pool->tx_buff = 421 kcalloc(adapter->max_tx_entries_per_subcrq, 422 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); 423 if (!tx_pool->tx_buff) 424 goto tx_pool_alloc_failed; 425 426 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 427 adapter->max_tx_entries_per_subcrq * 428 adapter->req_mtu)) 429 goto tx_ltb_alloc_failed; 430 431 tx_pool->free_map = 432 kcalloc(adapter->max_tx_entries_per_subcrq, 433 sizeof(int), GFP_KERNEL); 434 if (!tx_pool->free_map) 435 goto tx_fm_alloc_failed; 436 437 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++) 438 tx_pool->free_map[j] = j; 439 440 tx_pool->consumer_index = 0; 441 tx_pool->producer_index = 0; 442 } 443 adapter->bounce_buffer_size = 444 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; 445 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size, 446 GFP_KERNEL); 447 if (!adapter->bounce_buffer) 448 goto bounce_alloc_failed; 449 450 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer, 451 adapter->bounce_buffer_size, 452 DMA_TO_DEVICE); 453 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 454 dev_err(dev, "Couldn't map tx bounce buffer\n"); 455 goto bounce_map_failed; 456 } 457 replenish_pools(adapter); 458 459 /* We're ready to receive frames, enable the sub-crq interrupts and 460 * set the logical link state to up 461 */ 462 for (i = 0; i < adapter->req_rx_queues; i++) 463 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 464 465 for (i = 0; i < adapter->req_tx_queues; i++) 466 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 467 468 memset(&crq, 0, sizeof(crq)); 469 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 470 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 471 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; 472 ibmvnic_send_crq(adapter, &crq); 473 474 netif_tx_start_all_queues(netdev); 475 476 return 0; 477 478 bounce_map_failed: 479 kfree(adapter->bounce_buffer); 480 bounce_alloc_failed: 481 i = tx_subcrqs - 1; 482 kfree(adapter->tx_pool[i].free_map); 483 tx_fm_alloc_failed: 484 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff); 485 tx_ltb_alloc_failed: 486 kfree(adapter->tx_pool[i].tx_buff); 487 tx_pool_alloc_failed: 488 for (j = 0; j < i; j++) { 489 kfree(adapter->tx_pool[j].tx_buff); 490 free_long_term_buff(adapter, 491 &adapter->tx_pool[j].long_term_buff); 492 kfree(adapter->tx_pool[j].free_map); 493 } 494 kfree(adapter->tx_pool); 495 adapter->tx_pool = NULL; 496 tx_pool_arr_alloc_failed: 497 i = rxadd_subcrqs; 498 rx_pool_alloc_failed: 499 for (j = 0; j < i; j++) { 500 free_rx_pool(adapter, &adapter->rx_pool[j]); 501 free_long_term_buff(adapter, 502 &adapter->rx_pool[j].long_term_buff); 503 } 504 kfree(adapter->rx_pool); 505 adapter->rx_pool = NULL; 506 rx_pool_arr_alloc_failed: 507 for (i = 0; i < adapter->req_rx_queues; i++) 508 napi_enable(&adapter->napi[i]); 509 alloc_napi_failed: 510 return -ENOMEM; 511 } 512 513 static int ibmvnic_close(struct net_device *netdev) 514 { 515 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 516 struct device *dev = &adapter->vdev->dev; 517 union ibmvnic_crq crq; 518 int i; 519 520 adapter->closing = true; 521 522 for (i = 0; i < adapter->req_rx_queues; i++) 523 napi_disable(&adapter->napi[i]); 524 525 if (!adapter->failover) 526 netif_tx_stop_all_queues(netdev); 527 528 if (adapter->bounce_buffer) { 529 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 530 dma_unmap_single(&adapter->vdev->dev, 531 adapter->bounce_buffer_dma, 532 adapter->bounce_buffer_size, 533 DMA_BIDIRECTIONAL); 534 adapter->bounce_buffer_dma = DMA_ERROR_CODE; 535 } 536 kfree(adapter->bounce_buffer); 537 adapter->bounce_buffer = NULL; 538 } 539 540 memset(&crq, 0, sizeof(crq)); 541 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 542 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 543 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; 544 ibmvnic_send_crq(adapter, &crq); 545 546 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 547 i++) { 548 kfree(adapter->tx_pool[i].tx_buff); 549 free_long_term_buff(adapter, 550 &adapter->tx_pool[i].long_term_buff); 551 kfree(adapter->tx_pool[i].free_map); 552 } 553 kfree(adapter->tx_pool); 554 adapter->tx_pool = NULL; 555 556 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 557 i++) { 558 free_rx_pool(adapter, &adapter->rx_pool[i]); 559 free_long_term_buff(adapter, 560 &adapter->rx_pool[i].long_term_buff); 561 } 562 kfree(adapter->rx_pool); 563 adapter->rx_pool = NULL; 564 565 adapter->closing = false; 566 567 return 0; 568 } 569 570 /** 571 * build_hdr_data - creates L2/L3/L4 header data buffer 572 * @hdr_field - bitfield determining needed headers 573 * @skb - socket buffer 574 * @hdr_len - array of header lengths 575 * @tot_len - total length of data 576 * 577 * Reads hdr_field to determine which headers are needed by firmware. 578 * Builds a buffer containing these headers. Saves individual header 579 * lengths and total buffer length to be used to build descriptors. 580 */ 581 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 582 int *hdr_len, u8 *hdr_data) 583 { 584 int len = 0; 585 u8 *hdr; 586 587 hdr_len[0] = sizeof(struct ethhdr); 588 589 if (skb->protocol == htons(ETH_P_IP)) { 590 hdr_len[1] = ip_hdr(skb)->ihl * 4; 591 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 592 hdr_len[2] = tcp_hdrlen(skb); 593 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 594 hdr_len[2] = sizeof(struct udphdr); 595 } else if (skb->protocol == htons(ETH_P_IPV6)) { 596 hdr_len[1] = sizeof(struct ipv6hdr); 597 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 598 hdr_len[2] = tcp_hdrlen(skb); 599 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 600 hdr_len[2] = sizeof(struct udphdr); 601 } 602 603 memset(hdr_data, 0, 120); 604 if ((hdr_field >> 6) & 1) { 605 hdr = skb_mac_header(skb); 606 memcpy(hdr_data, hdr, hdr_len[0]); 607 len += hdr_len[0]; 608 } 609 610 if ((hdr_field >> 5) & 1) { 611 hdr = skb_network_header(skb); 612 memcpy(hdr_data + len, hdr, hdr_len[1]); 613 len += hdr_len[1]; 614 } 615 616 if ((hdr_field >> 4) & 1) { 617 hdr = skb_transport_header(skb); 618 memcpy(hdr_data + len, hdr, hdr_len[2]); 619 len += hdr_len[2]; 620 } 621 return len; 622 } 623 624 /** 625 * create_hdr_descs - create header and header extension descriptors 626 * @hdr_field - bitfield determining needed headers 627 * @data - buffer containing header data 628 * @len - length of data buffer 629 * @hdr_len - array of individual header lengths 630 * @scrq_arr - descriptor array 631 * 632 * Creates header and, if needed, header extension descriptors and 633 * places them in a descriptor array, scrq_arr 634 */ 635 636 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 637 union sub_crq *scrq_arr) 638 { 639 union sub_crq hdr_desc; 640 int tmp_len = len; 641 u8 *data, *cur; 642 int tmp; 643 644 while (tmp_len > 0) { 645 cur = hdr_data + len - tmp_len; 646 647 memset(&hdr_desc, 0, sizeof(hdr_desc)); 648 if (cur != hdr_data) { 649 data = hdr_desc.hdr_ext.data; 650 tmp = tmp_len > 29 ? 29 : tmp_len; 651 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 652 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 653 hdr_desc.hdr_ext.len = tmp; 654 } else { 655 data = hdr_desc.hdr.data; 656 tmp = tmp_len > 24 ? 24 : tmp_len; 657 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 658 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 659 hdr_desc.hdr.len = tmp; 660 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 661 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 662 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 663 hdr_desc.hdr.flag = hdr_field << 1; 664 } 665 memcpy(data, cur, tmp); 666 tmp_len -= tmp; 667 *scrq_arr = hdr_desc; 668 scrq_arr++; 669 } 670 } 671 672 /** 673 * build_hdr_descs_arr - build a header descriptor array 674 * @skb - socket buffer 675 * @num_entries - number of descriptors to be sent 676 * @subcrq - first TX descriptor 677 * @hdr_field - bit field determining which headers will be sent 678 * 679 * This function will build a TX descriptor array with applicable 680 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 681 */ 682 683 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 684 int *num_entries, u8 hdr_field) 685 { 686 int hdr_len[3] = {0, 0, 0}; 687 int tot_len, len; 688 u8 *hdr_data = txbuff->hdr_data; 689 690 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 691 txbuff->hdr_data); 692 len = tot_len; 693 len -= 24; 694 if (len > 0) 695 num_entries += len % 29 ? len / 29 + 1 : len / 29; 696 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 697 txbuff->indir_arr + 1); 698 } 699 700 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 701 { 702 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 703 int queue_num = skb_get_queue_mapping(skb); 704 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 705 struct device *dev = &adapter->vdev->dev; 706 struct ibmvnic_tx_buff *tx_buff = NULL; 707 struct ibmvnic_tx_pool *tx_pool; 708 unsigned int tx_send_failed = 0; 709 unsigned int tx_map_failed = 0; 710 unsigned int tx_dropped = 0; 711 unsigned int tx_packets = 0; 712 unsigned int tx_bytes = 0; 713 dma_addr_t data_dma_addr; 714 struct netdev_queue *txq; 715 bool used_bounce = false; 716 unsigned long lpar_rc; 717 union sub_crq tx_crq; 718 unsigned int offset; 719 int num_entries = 1; 720 unsigned char *dst; 721 u64 *handle_array; 722 int index = 0; 723 int ret = 0; 724 725 tx_pool = &adapter->tx_pool[queue_num]; 726 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 727 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 728 be32_to_cpu(adapter->login_rsp_buf-> 729 off_txsubm_subcrqs)); 730 if (adapter->migrated) { 731 tx_send_failed++; 732 tx_dropped++; 733 ret = NETDEV_TX_BUSY; 734 goto out; 735 } 736 737 index = tx_pool->free_map[tx_pool->consumer_index]; 738 offset = index * adapter->req_mtu; 739 dst = tx_pool->long_term_buff.buff + offset; 740 memset(dst, 0, adapter->req_mtu); 741 skb_copy_from_linear_data(skb, dst, skb->len); 742 data_dma_addr = tx_pool->long_term_buff.addr + offset; 743 744 tx_pool->consumer_index = 745 (tx_pool->consumer_index + 1) % 746 adapter->max_tx_entries_per_subcrq; 747 748 tx_buff = &tx_pool->tx_buff[index]; 749 tx_buff->skb = skb; 750 tx_buff->data_dma[0] = data_dma_addr; 751 tx_buff->data_len[0] = skb->len; 752 tx_buff->index = index; 753 tx_buff->pool_index = queue_num; 754 tx_buff->last_frag = true; 755 tx_buff->used_bounce = used_bounce; 756 757 memset(&tx_crq, 0, sizeof(tx_crq)); 758 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 759 tx_crq.v1.type = IBMVNIC_TX_DESC; 760 tx_crq.v1.n_crq_elem = 1; 761 tx_crq.v1.n_sge = 1; 762 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 763 tx_crq.v1.correlator = cpu_to_be32(index); 764 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 765 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 766 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 767 768 if (adapter->vlan_header_insertion) { 769 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 770 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 771 } 772 773 if (skb->protocol == htons(ETH_P_IP)) { 774 if (ip_hdr(skb)->version == 4) 775 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 776 else if (ip_hdr(skb)->version == 6) 777 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 778 779 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 780 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 781 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 782 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 783 } 784 785 if (skb->ip_summed == CHECKSUM_PARTIAL) { 786 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 787 hdrs += 2; 788 } 789 /* determine if l2/3/4 headers are sent to firmware */ 790 if ((*hdrs >> 7) & 1 && 791 (skb->protocol == htons(ETH_P_IP) || 792 skb->protocol == htons(ETH_P_IPV6))) { 793 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 794 tx_crq.v1.n_crq_elem = num_entries; 795 tx_buff->indir_arr[0] = tx_crq; 796 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 797 sizeof(tx_buff->indir_arr), 798 DMA_TO_DEVICE); 799 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 800 if (!firmware_has_feature(FW_FEATURE_CMO)) 801 dev_err(dev, "tx: unable to map descriptor array\n"); 802 tx_map_failed++; 803 tx_dropped++; 804 ret = NETDEV_TX_BUSY; 805 goto out; 806 } 807 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 808 (u64)tx_buff->indir_dma, 809 (u64)num_entries); 810 } else { 811 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 812 &tx_crq); 813 } 814 if (lpar_rc != H_SUCCESS) { 815 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 816 817 if (tx_pool->consumer_index == 0) 818 tx_pool->consumer_index = 819 adapter->max_tx_entries_per_subcrq - 1; 820 else 821 tx_pool->consumer_index--; 822 823 tx_send_failed++; 824 tx_dropped++; 825 ret = NETDEV_TX_BUSY; 826 goto out; 827 } 828 tx_packets++; 829 tx_bytes += skb->len; 830 txq->trans_start = jiffies; 831 ret = NETDEV_TX_OK; 832 833 out: 834 netdev->stats.tx_dropped += tx_dropped; 835 netdev->stats.tx_bytes += tx_bytes; 836 netdev->stats.tx_packets += tx_packets; 837 adapter->tx_send_failed += tx_send_failed; 838 adapter->tx_map_failed += tx_map_failed; 839 840 return ret; 841 } 842 843 static void ibmvnic_set_multi(struct net_device *netdev) 844 { 845 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 846 struct netdev_hw_addr *ha; 847 union ibmvnic_crq crq; 848 849 memset(&crq, 0, sizeof(crq)); 850 crq.request_capability.first = IBMVNIC_CRQ_CMD; 851 crq.request_capability.cmd = REQUEST_CAPABILITY; 852 853 if (netdev->flags & IFF_PROMISC) { 854 if (!adapter->promisc_supported) 855 return; 856 } else { 857 if (netdev->flags & IFF_ALLMULTI) { 858 /* Accept all multicast */ 859 memset(&crq, 0, sizeof(crq)); 860 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 861 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 862 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 863 ibmvnic_send_crq(adapter, &crq); 864 } else if (netdev_mc_empty(netdev)) { 865 /* Reject all multicast */ 866 memset(&crq, 0, sizeof(crq)); 867 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 868 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 869 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 870 ibmvnic_send_crq(adapter, &crq); 871 } else { 872 /* Accept one or more multicast(s) */ 873 netdev_for_each_mc_addr(ha, netdev) { 874 memset(&crq, 0, sizeof(crq)); 875 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 876 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 877 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 878 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 879 ha->addr); 880 ibmvnic_send_crq(adapter, &crq); 881 } 882 } 883 } 884 } 885 886 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 887 { 888 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 889 struct sockaddr *addr = p; 890 union ibmvnic_crq crq; 891 892 if (!is_valid_ether_addr(addr->sa_data)) 893 return -EADDRNOTAVAIL; 894 895 memset(&crq, 0, sizeof(crq)); 896 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 897 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 898 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 899 ibmvnic_send_crq(adapter, &crq); 900 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 901 return 0; 902 } 903 904 static void ibmvnic_tx_timeout(struct net_device *dev) 905 { 906 struct ibmvnic_adapter *adapter = netdev_priv(dev); 907 int rc; 908 909 /* Adapter timed out, resetting it */ 910 release_sub_crqs(adapter); 911 rc = ibmvnic_reset_crq(adapter); 912 if (rc) 913 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 914 else 915 ibmvnic_send_crq_init(adapter); 916 } 917 918 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 919 struct ibmvnic_rx_buff *rx_buff) 920 { 921 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 922 923 rx_buff->skb = NULL; 924 925 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 926 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 927 928 atomic_dec(&pool->available); 929 } 930 931 static int ibmvnic_poll(struct napi_struct *napi, int budget) 932 { 933 struct net_device *netdev = napi->dev; 934 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 935 int scrq_num = (int)(napi - adapter->napi); 936 int frames_processed = 0; 937 restart_poll: 938 while (frames_processed < budget) { 939 struct sk_buff *skb; 940 struct ibmvnic_rx_buff *rx_buff; 941 union sub_crq *next; 942 u32 length; 943 u16 offset; 944 u8 flags = 0; 945 946 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 947 break; 948 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 949 rx_buff = 950 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 951 rx_comp.correlator); 952 /* do error checking */ 953 if (next->rx_comp.rc) { 954 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 955 /* free the entry */ 956 next->rx_comp.first = 0; 957 remove_buff_from_pool(adapter, rx_buff); 958 break; 959 } 960 961 length = be32_to_cpu(next->rx_comp.len); 962 offset = be16_to_cpu(next->rx_comp.off_frame_data); 963 flags = next->rx_comp.flags; 964 skb = rx_buff->skb; 965 skb_copy_to_linear_data(skb, rx_buff->data + offset, 966 length); 967 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); 968 /* free the entry */ 969 next->rx_comp.first = 0; 970 remove_buff_from_pool(adapter, rx_buff); 971 972 skb_put(skb, length); 973 skb->protocol = eth_type_trans(skb, netdev); 974 975 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 976 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 977 skb->ip_summed = CHECKSUM_UNNECESSARY; 978 } 979 980 length = skb->len; 981 napi_gro_receive(napi, skb); /* send it up */ 982 netdev->stats.rx_packets++; 983 netdev->stats.rx_bytes += length; 984 frames_processed++; 985 } 986 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 987 988 if (frames_processed < budget) { 989 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 990 napi_complete(napi); 991 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 992 napi_reschedule(napi)) { 993 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 994 goto restart_poll; 995 } 996 } 997 return frames_processed; 998 } 999 1000 #ifdef CONFIG_NET_POLL_CONTROLLER 1001 static void ibmvnic_netpoll_controller(struct net_device *dev) 1002 { 1003 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1004 int i; 1005 1006 replenish_pools(netdev_priv(dev)); 1007 for (i = 0; i < adapter->req_rx_queues; i++) 1008 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1009 adapter->rx_scrq[i]); 1010 } 1011 #endif 1012 1013 static const struct net_device_ops ibmvnic_netdev_ops = { 1014 .ndo_open = ibmvnic_open, 1015 .ndo_stop = ibmvnic_close, 1016 .ndo_start_xmit = ibmvnic_xmit, 1017 .ndo_set_rx_mode = ibmvnic_set_multi, 1018 .ndo_set_mac_address = ibmvnic_set_mac, 1019 .ndo_validate_addr = eth_validate_addr, 1020 .ndo_tx_timeout = ibmvnic_tx_timeout, 1021 #ifdef CONFIG_NET_POLL_CONTROLLER 1022 .ndo_poll_controller = ibmvnic_netpoll_controller, 1023 #endif 1024 }; 1025 1026 /* ethtool functions */ 1027 1028 static int ibmvnic_get_settings(struct net_device *netdev, 1029 struct ethtool_cmd *cmd) 1030 { 1031 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1032 SUPPORTED_FIBRE); 1033 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1034 ADVERTISED_FIBRE); 1035 ethtool_cmd_speed_set(cmd, SPEED_1000); 1036 cmd->duplex = DUPLEX_FULL; 1037 cmd->port = PORT_FIBRE; 1038 cmd->phy_address = 0; 1039 cmd->transceiver = XCVR_INTERNAL; 1040 cmd->autoneg = AUTONEG_ENABLE; 1041 cmd->maxtxpkt = 0; 1042 cmd->maxrxpkt = 1; 1043 return 0; 1044 } 1045 1046 static void ibmvnic_get_drvinfo(struct net_device *dev, 1047 struct ethtool_drvinfo *info) 1048 { 1049 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1050 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1051 } 1052 1053 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1054 { 1055 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1056 1057 return adapter->msg_enable; 1058 } 1059 1060 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1061 { 1062 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1063 1064 adapter->msg_enable = data; 1065 } 1066 1067 static u32 ibmvnic_get_link(struct net_device *netdev) 1068 { 1069 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1070 1071 /* Don't need to send a query because we request a logical link up at 1072 * init and then we wait for link state indications 1073 */ 1074 return adapter->logical_link_state; 1075 } 1076 1077 static void ibmvnic_get_ringparam(struct net_device *netdev, 1078 struct ethtool_ringparam *ring) 1079 { 1080 ring->rx_max_pending = 0; 1081 ring->tx_max_pending = 0; 1082 ring->rx_mini_max_pending = 0; 1083 ring->rx_jumbo_max_pending = 0; 1084 ring->rx_pending = 0; 1085 ring->tx_pending = 0; 1086 ring->rx_mini_pending = 0; 1087 ring->rx_jumbo_pending = 0; 1088 } 1089 1090 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1091 { 1092 int i; 1093 1094 if (stringset != ETH_SS_STATS) 1095 return; 1096 1097 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1098 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1099 } 1100 1101 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1102 { 1103 switch (sset) { 1104 case ETH_SS_STATS: 1105 return ARRAY_SIZE(ibmvnic_stats); 1106 default: 1107 return -EOPNOTSUPP; 1108 } 1109 } 1110 1111 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1112 struct ethtool_stats *stats, u64 *data) 1113 { 1114 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1115 union ibmvnic_crq crq; 1116 int i; 1117 1118 memset(&crq, 0, sizeof(crq)); 1119 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1120 crq.request_statistics.cmd = REQUEST_STATISTICS; 1121 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1122 crq.request_statistics.len = 1123 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1124 ibmvnic_send_crq(adapter, &crq); 1125 1126 /* Wait for data to be written */ 1127 init_completion(&adapter->stats_done); 1128 wait_for_completion(&adapter->stats_done); 1129 1130 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1131 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1132 } 1133 1134 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1135 .get_settings = ibmvnic_get_settings, 1136 .get_drvinfo = ibmvnic_get_drvinfo, 1137 .get_msglevel = ibmvnic_get_msglevel, 1138 .set_msglevel = ibmvnic_set_msglevel, 1139 .get_link = ibmvnic_get_link, 1140 .get_ringparam = ibmvnic_get_ringparam, 1141 .get_strings = ibmvnic_get_strings, 1142 .get_sset_count = ibmvnic_get_sset_count, 1143 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1144 }; 1145 1146 /* Routines for managing CRQs/sCRQs */ 1147 1148 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1149 struct ibmvnic_sub_crq_queue *scrq) 1150 { 1151 struct device *dev = &adapter->vdev->dev; 1152 long rc; 1153 1154 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1155 1156 /* Close the sub-crqs */ 1157 do { 1158 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1159 adapter->vdev->unit_address, 1160 scrq->crq_num); 1161 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1162 1163 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1164 DMA_BIDIRECTIONAL); 1165 free_pages((unsigned long)scrq->msgs, 2); 1166 kfree(scrq); 1167 } 1168 1169 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1170 *adapter) 1171 { 1172 struct device *dev = &adapter->vdev->dev; 1173 struct ibmvnic_sub_crq_queue *scrq; 1174 int rc; 1175 1176 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); 1177 if (!scrq) 1178 return NULL; 1179 1180 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); 1181 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1182 if (!scrq->msgs) { 1183 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1184 goto zero_page_failed; 1185 } 1186 1187 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1188 DMA_BIDIRECTIONAL); 1189 if (dma_mapping_error(dev, scrq->msg_token)) { 1190 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1191 goto map_failed; 1192 } 1193 1194 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1195 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1196 1197 if (rc == H_RESOURCE) 1198 rc = ibmvnic_reset_crq(adapter); 1199 1200 if (rc == H_CLOSED) { 1201 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1202 } else if (rc) { 1203 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1204 goto reg_failed; 1205 } 1206 1207 scrq->adapter = adapter; 1208 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1209 scrq->cur = 0; 1210 scrq->rx_skb_top = NULL; 1211 spin_lock_init(&scrq->lock); 1212 1213 netdev_dbg(adapter->netdev, 1214 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1215 scrq->crq_num, scrq->hw_irq, scrq->irq); 1216 1217 return scrq; 1218 1219 reg_failed: 1220 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1221 DMA_BIDIRECTIONAL); 1222 map_failed: 1223 free_pages((unsigned long)scrq->msgs, 2); 1224 zero_page_failed: 1225 kfree(scrq); 1226 1227 return NULL; 1228 } 1229 1230 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1231 { 1232 int i; 1233 1234 if (adapter->tx_scrq) { 1235 for (i = 0; i < adapter->req_tx_queues; i++) 1236 if (adapter->tx_scrq[i]) { 1237 free_irq(adapter->tx_scrq[i]->irq, 1238 adapter->tx_scrq[i]); 1239 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1240 release_sub_crq_queue(adapter, 1241 adapter->tx_scrq[i]); 1242 } 1243 adapter->tx_scrq = NULL; 1244 } 1245 1246 if (adapter->rx_scrq) { 1247 for (i = 0; i < adapter->req_rx_queues; i++) 1248 if (adapter->rx_scrq[i]) { 1249 free_irq(adapter->rx_scrq[i]->irq, 1250 adapter->rx_scrq[i]); 1251 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1252 release_sub_crq_queue(adapter, 1253 adapter->rx_scrq[i]); 1254 } 1255 adapter->rx_scrq = NULL; 1256 } 1257 1258 adapter->requested_caps = 0; 1259 } 1260 1261 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter) 1262 { 1263 int i; 1264 1265 if (adapter->tx_scrq) { 1266 for (i = 0; i < adapter->req_tx_queues; i++) 1267 if (adapter->tx_scrq[i]) 1268 release_sub_crq_queue(adapter, 1269 adapter->tx_scrq[i]); 1270 adapter->tx_scrq = NULL; 1271 } 1272 1273 if (adapter->rx_scrq) { 1274 for (i = 0; i < adapter->req_rx_queues; i++) 1275 if (adapter->rx_scrq[i]) 1276 release_sub_crq_queue(adapter, 1277 adapter->rx_scrq[i]); 1278 adapter->rx_scrq = NULL; 1279 } 1280 1281 adapter->requested_caps = 0; 1282 } 1283 1284 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1285 struct ibmvnic_sub_crq_queue *scrq) 1286 { 1287 struct device *dev = &adapter->vdev->dev; 1288 unsigned long rc; 1289 1290 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1291 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1292 if (rc) 1293 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1294 scrq->hw_irq, rc); 1295 return rc; 1296 } 1297 1298 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1299 struct ibmvnic_sub_crq_queue *scrq) 1300 { 1301 struct device *dev = &adapter->vdev->dev; 1302 unsigned long rc; 1303 1304 if (scrq->hw_irq > 0x100000000ULL) { 1305 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1306 return 1; 1307 } 1308 1309 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1310 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1311 if (rc) 1312 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1313 scrq->hw_irq, rc); 1314 return rc; 1315 } 1316 1317 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1318 struct ibmvnic_sub_crq_queue *scrq) 1319 { 1320 struct device *dev = &adapter->vdev->dev; 1321 struct ibmvnic_tx_buff *txbuff; 1322 union sub_crq *next; 1323 int index; 1324 int i, j; 1325 u8 first; 1326 1327 restart_loop: 1328 while (pending_scrq(adapter, scrq)) { 1329 unsigned int pool = scrq->pool_index; 1330 1331 next = ibmvnic_next_scrq(adapter, scrq); 1332 for (i = 0; i < next->tx_comp.num_comps; i++) { 1333 if (next->tx_comp.rcs[i]) { 1334 dev_err(dev, "tx error %x\n", 1335 next->tx_comp.rcs[i]); 1336 continue; 1337 } 1338 index = be32_to_cpu(next->tx_comp.correlators[i]); 1339 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1340 1341 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1342 if (!txbuff->data_dma[j]) 1343 continue; 1344 1345 txbuff->data_dma[j] = 0; 1346 txbuff->used_bounce = false; 1347 } 1348 /* if sub_crq was sent indirectly */ 1349 first = txbuff->indir_arr[0].generic.first; 1350 if (first == IBMVNIC_CRQ_CMD) { 1351 dma_unmap_single(dev, txbuff->indir_dma, 1352 sizeof(txbuff->indir_arr), 1353 DMA_TO_DEVICE); 1354 } 1355 1356 if (txbuff->last_frag) 1357 dev_kfree_skb_any(txbuff->skb); 1358 1359 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1360 producer_index] = index; 1361 adapter->tx_pool[pool].producer_index = 1362 (adapter->tx_pool[pool].producer_index + 1) % 1363 adapter->max_tx_entries_per_subcrq; 1364 } 1365 /* remove tx_comp scrq*/ 1366 next->tx_comp.first = 0; 1367 } 1368 1369 enable_scrq_irq(adapter, scrq); 1370 1371 if (pending_scrq(adapter, scrq)) { 1372 disable_scrq_irq(adapter, scrq); 1373 goto restart_loop; 1374 } 1375 1376 return 0; 1377 } 1378 1379 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1380 { 1381 struct ibmvnic_sub_crq_queue *scrq = instance; 1382 struct ibmvnic_adapter *adapter = scrq->adapter; 1383 1384 disable_scrq_irq(adapter, scrq); 1385 ibmvnic_complete_tx(adapter, scrq); 1386 1387 return IRQ_HANDLED; 1388 } 1389 1390 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1391 { 1392 struct ibmvnic_sub_crq_queue *scrq = instance; 1393 struct ibmvnic_adapter *adapter = scrq->adapter; 1394 1395 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1396 disable_scrq_irq(adapter, scrq); 1397 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1398 } 1399 1400 return IRQ_HANDLED; 1401 } 1402 1403 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1404 { 1405 struct device *dev = &adapter->vdev->dev; 1406 struct ibmvnic_sub_crq_queue *scrq; 1407 int i = 0, j = 0; 1408 int rc = 0; 1409 1410 for (i = 0; i < adapter->req_tx_queues; i++) { 1411 scrq = adapter->tx_scrq[i]; 1412 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1413 1414 if (!scrq->irq) { 1415 rc = -EINVAL; 1416 dev_err(dev, "Error mapping irq\n"); 1417 goto req_tx_irq_failed; 1418 } 1419 1420 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1421 0, "ibmvnic_tx", scrq); 1422 1423 if (rc) { 1424 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1425 scrq->irq, rc); 1426 irq_dispose_mapping(scrq->irq); 1427 goto req_rx_irq_failed; 1428 } 1429 } 1430 1431 for (i = 0; i < adapter->req_rx_queues; i++) { 1432 scrq = adapter->rx_scrq[i]; 1433 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1434 if (!scrq->irq) { 1435 rc = -EINVAL; 1436 dev_err(dev, "Error mapping irq\n"); 1437 goto req_rx_irq_failed; 1438 } 1439 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1440 0, "ibmvnic_rx", scrq); 1441 if (rc) { 1442 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1443 scrq->irq, rc); 1444 irq_dispose_mapping(scrq->irq); 1445 goto req_rx_irq_failed; 1446 } 1447 } 1448 return rc; 1449 1450 req_rx_irq_failed: 1451 for (j = 0; j < i; j++) { 1452 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1453 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1454 } 1455 i = adapter->req_tx_queues; 1456 req_tx_irq_failed: 1457 for (j = 0; j < i; j++) { 1458 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1459 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1460 } 1461 release_sub_crqs_no_irqs(adapter); 1462 return rc; 1463 } 1464 1465 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) 1466 { 1467 struct device *dev = &adapter->vdev->dev; 1468 struct ibmvnic_sub_crq_queue **allqueues; 1469 int registered_queues = 0; 1470 union ibmvnic_crq crq; 1471 int total_queues; 1472 int more = 0; 1473 int i; 1474 1475 if (!retry) { 1476 /* Sub-CRQ entries are 32 byte long */ 1477 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1478 1479 if (adapter->min_tx_entries_per_subcrq > entries_page || 1480 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1481 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1482 goto allqueues_failed; 1483 } 1484 1485 /* Get the minimum between the queried max and the entries 1486 * that fit in our PAGE_SIZE 1487 */ 1488 adapter->req_tx_entries_per_subcrq = 1489 adapter->max_tx_entries_per_subcrq > entries_page ? 1490 entries_page : adapter->max_tx_entries_per_subcrq; 1491 adapter->req_rx_add_entries_per_subcrq = 1492 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1493 entries_page : adapter->max_rx_add_entries_per_subcrq; 1494 1495 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1496 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1497 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1498 1499 adapter->req_mtu = adapter->max_mtu; 1500 } 1501 1502 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1503 1504 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); 1505 if (!allqueues) 1506 goto allqueues_failed; 1507 1508 for (i = 0; i < total_queues; i++) { 1509 allqueues[i] = init_sub_crq_queue(adapter); 1510 if (!allqueues[i]) { 1511 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1512 break; 1513 } 1514 registered_queues++; 1515 } 1516 1517 /* Make sure we were able to register the minimum number of queues */ 1518 if (registered_queues < 1519 adapter->min_tx_queues + adapter->min_rx_queues) { 1520 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1521 goto tx_failed; 1522 } 1523 1524 /* Distribute the failed allocated queues*/ 1525 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1526 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1527 switch (i % 3) { 1528 case 0: 1529 if (adapter->req_rx_queues > adapter->min_rx_queues) 1530 adapter->req_rx_queues--; 1531 else 1532 more++; 1533 break; 1534 case 1: 1535 if (adapter->req_tx_queues > adapter->min_tx_queues) 1536 adapter->req_tx_queues--; 1537 else 1538 more++; 1539 break; 1540 } 1541 } 1542 1543 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1544 sizeof(*adapter->tx_scrq), GFP_ATOMIC); 1545 if (!adapter->tx_scrq) 1546 goto tx_failed; 1547 1548 for (i = 0; i < adapter->req_tx_queues; i++) { 1549 adapter->tx_scrq[i] = allqueues[i]; 1550 adapter->tx_scrq[i]->pool_index = i; 1551 } 1552 1553 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1554 sizeof(*adapter->rx_scrq), GFP_ATOMIC); 1555 if (!adapter->rx_scrq) 1556 goto rx_failed; 1557 1558 for (i = 0; i < adapter->req_rx_queues; i++) { 1559 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1560 adapter->rx_scrq[i]->scrq_num = i; 1561 } 1562 1563 memset(&crq, 0, sizeof(crq)); 1564 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1565 crq.request_capability.cmd = REQUEST_CAPABILITY; 1566 1567 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1568 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1569 ibmvnic_send_crq(adapter, &crq); 1570 1571 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1572 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1573 ibmvnic_send_crq(adapter, &crq); 1574 1575 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1576 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1577 ibmvnic_send_crq(adapter, &crq); 1578 1579 crq.request_capability.capability = 1580 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1581 crq.request_capability.number = 1582 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1583 ibmvnic_send_crq(adapter, &crq); 1584 1585 crq.request_capability.capability = 1586 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1587 crq.request_capability.number = 1588 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1589 ibmvnic_send_crq(adapter, &crq); 1590 1591 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1592 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1593 ibmvnic_send_crq(adapter, &crq); 1594 1595 if (adapter->netdev->flags & IFF_PROMISC) { 1596 if (adapter->promisc_supported) { 1597 crq.request_capability.capability = 1598 cpu_to_be16(PROMISC_REQUESTED); 1599 crq.request_capability.number = cpu_to_be64(1); 1600 ibmvnic_send_crq(adapter, &crq); 1601 } 1602 } else { 1603 crq.request_capability.capability = 1604 cpu_to_be16(PROMISC_REQUESTED); 1605 crq.request_capability.number = cpu_to_be64(0); 1606 ibmvnic_send_crq(adapter, &crq); 1607 } 1608 1609 kfree(allqueues); 1610 1611 return; 1612 1613 rx_failed: 1614 kfree(adapter->tx_scrq); 1615 adapter->tx_scrq = NULL; 1616 tx_failed: 1617 for (i = 0; i < registered_queues; i++) 1618 release_sub_crq_queue(adapter, allqueues[i]); 1619 kfree(allqueues); 1620 allqueues_failed: 1621 ibmvnic_remove(adapter->vdev); 1622 } 1623 1624 static int pending_scrq(struct ibmvnic_adapter *adapter, 1625 struct ibmvnic_sub_crq_queue *scrq) 1626 { 1627 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1628 1629 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1630 return 1; 1631 else 1632 return 0; 1633 } 1634 1635 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1636 struct ibmvnic_sub_crq_queue *scrq) 1637 { 1638 union sub_crq *entry; 1639 unsigned long flags; 1640 1641 spin_lock_irqsave(&scrq->lock, flags); 1642 entry = &scrq->msgs[scrq->cur]; 1643 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1644 if (++scrq->cur == scrq->size) 1645 scrq->cur = 0; 1646 } else { 1647 entry = NULL; 1648 } 1649 spin_unlock_irqrestore(&scrq->lock, flags); 1650 1651 return entry; 1652 } 1653 1654 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1655 { 1656 struct ibmvnic_crq_queue *queue = &adapter->crq; 1657 union ibmvnic_crq *crq; 1658 1659 crq = &queue->msgs[queue->cur]; 1660 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1661 if (++queue->cur == queue->size) 1662 queue->cur = 0; 1663 } else { 1664 crq = NULL; 1665 } 1666 1667 return crq; 1668 } 1669 1670 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1671 union sub_crq *sub_crq) 1672 { 1673 unsigned int ua = adapter->vdev->unit_address; 1674 struct device *dev = &adapter->vdev->dev; 1675 u64 *u64_crq = (u64 *)sub_crq; 1676 int rc; 1677 1678 netdev_dbg(adapter->netdev, 1679 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1680 (unsigned long int)cpu_to_be64(remote_handle), 1681 (unsigned long int)cpu_to_be64(u64_crq[0]), 1682 (unsigned long int)cpu_to_be64(u64_crq[1]), 1683 (unsigned long int)cpu_to_be64(u64_crq[2]), 1684 (unsigned long int)cpu_to_be64(u64_crq[3])); 1685 1686 /* Make sure the hypervisor sees the complete request */ 1687 mb(); 1688 1689 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1690 cpu_to_be64(remote_handle), 1691 cpu_to_be64(u64_crq[0]), 1692 cpu_to_be64(u64_crq[1]), 1693 cpu_to_be64(u64_crq[2]), 1694 cpu_to_be64(u64_crq[3])); 1695 1696 if (rc) { 1697 if (rc == H_CLOSED) 1698 dev_warn(dev, "CRQ Queue closed\n"); 1699 dev_err(dev, "Send error (rc=%d)\n", rc); 1700 } 1701 1702 return rc; 1703 } 1704 1705 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1706 u64 remote_handle, u64 ioba, u64 num_entries) 1707 { 1708 unsigned int ua = adapter->vdev->unit_address; 1709 struct device *dev = &adapter->vdev->dev; 1710 int rc; 1711 1712 /* Make sure the hypervisor sees the complete request */ 1713 mb(); 1714 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1715 cpu_to_be64(remote_handle), 1716 ioba, num_entries); 1717 1718 if (rc) { 1719 if (rc == H_CLOSED) 1720 dev_warn(dev, "CRQ Queue closed\n"); 1721 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1722 } 1723 1724 return rc; 1725 } 1726 1727 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1728 union ibmvnic_crq *crq) 1729 { 1730 unsigned int ua = adapter->vdev->unit_address; 1731 struct device *dev = &adapter->vdev->dev; 1732 u64 *u64_crq = (u64 *)crq; 1733 int rc; 1734 1735 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1736 (unsigned long int)cpu_to_be64(u64_crq[0]), 1737 (unsigned long int)cpu_to_be64(u64_crq[1])); 1738 1739 /* Make sure the hypervisor sees the complete request */ 1740 mb(); 1741 1742 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1743 cpu_to_be64(u64_crq[0]), 1744 cpu_to_be64(u64_crq[1])); 1745 1746 if (rc) { 1747 if (rc == H_CLOSED) 1748 dev_warn(dev, "CRQ Queue closed\n"); 1749 dev_warn(dev, "Send error (rc=%d)\n", rc); 1750 } 1751 1752 return rc; 1753 } 1754 1755 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1756 { 1757 union ibmvnic_crq crq; 1758 1759 memset(&crq, 0, sizeof(crq)); 1760 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1761 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1762 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1763 1764 return ibmvnic_send_crq(adapter, &crq); 1765 } 1766 1767 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1768 { 1769 union ibmvnic_crq crq; 1770 1771 memset(&crq, 0, sizeof(crq)); 1772 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1773 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 1774 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 1775 1776 return ibmvnic_send_crq(adapter, &crq); 1777 } 1778 1779 static int send_version_xchg(struct ibmvnic_adapter *adapter) 1780 { 1781 union ibmvnic_crq crq; 1782 1783 memset(&crq, 0, sizeof(crq)); 1784 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 1785 crq.version_exchange.cmd = VERSION_EXCHANGE; 1786 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 1787 1788 return ibmvnic_send_crq(adapter, &crq); 1789 } 1790 1791 static void send_login(struct ibmvnic_adapter *adapter) 1792 { 1793 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 1794 struct ibmvnic_login_buffer *login_buffer; 1795 struct ibmvnic_inflight_cmd *inflight_cmd; 1796 struct device *dev = &adapter->vdev->dev; 1797 dma_addr_t rsp_buffer_token; 1798 dma_addr_t buffer_token; 1799 size_t rsp_buffer_size; 1800 union ibmvnic_crq crq; 1801 unsigned long flags; 1802 size_t buffer_size; 1803 __be64 *tx_list_p; 1804 __be64 *rx_list_p; 1805 int i; 1806 1807 buffer_size = 1808 sizeof(struct ibmvnic_login_buffer) + 1809 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 1810 1811 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 1812 if (!login_buffer) 1813 goto buf_alloc_failed; 1814 1815 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 1816 DMA_TO_DEVICE); 1817 if (dma_mapping_error(dev, buffer_token)) { 1818 dev_err(dev, "Couldn't map login buffer\n"); 1819 goto buf_map_failed; 1820 } 1821 1822 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 1823 sizeof(u64) * adapter->req_tx_queues + 1824 sizeof(u64) * adapter->req_rx_queues + 1825 sizeof(u64) * adapter->req_rx_queues + 1826 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 1827 1828 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 1829 if (!login_rsp_buffer) 1830 goto buf_rsp_alloc_failed; 1831 1832 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 1833 rsp_buffer_size, DMA_FROM_DEVICE); 1834 if (dma_mapping_error(dev, rsp_buffer_token)) { 1835 dev_err(dev, "Couldn't map login rsp buffer\n"); 1836 goto buf_rsp_map_failed; 1837 } 1838 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 1839 if (!inflight_cmd) { 1840 dev_err(dev, "Couldn't allocate inflight_cmd\n"); 1841 goto inflight_alloc_failed; 1842 } 1843 adapter->login_buf = login_buffer; 1844 adapter->login_buf_token = buffer_token; 1845 adapter->login_buf_sz = buffer_size; 1846 adapter->login_rsp_buf = login_rsp_buffer; 1847 adapter->login_rsp_buf_token = rsp_buffer_token; 1848 adapter->login_rsp_buf_sz = rsp_buffer_size; 1849 1850 login_buffer->len = cpu_to_be32(buffer_size); 1851 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 1852 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 1853 login_buffer->off_txcomp_subcrqs = 1854 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 1855 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 1856 login_buffer->off_rxcomp_subcrqs = 1857 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 1858 sizeof(u64) * adapter->req_tx_queues); 1859 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 1860 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 1861 1862 tx_list_p = (__be64 *)((char *)login_buffer + 1863 sizeof(struct ibmvnic_login_buffer)); 1864 rx_list_p = (__be64 *)((char *)login_buffer + 1865 sizeof(struct ibmvnic_login_buffer) + 1866 sizeof(u64) * adapter->req_tx_queues); 1867 1868 for (i = 0; i < adapter->req_tx_queues; i++) { 1869 if (adapter->tx_scrq[i]) { 1870 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 1871 crq_num); 1872 } 1873 } 1874 1875 for (i = 0; i < adapter->req_rx_queues; i++) { 1876 if (adapter->rx_scrq[i]) { 1877 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 1878 crq_num); 1879 } 1880 } 1881 1882 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 1883 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 1884 netdev_dbg(adapter->netdev, "%016lx\n", 1885 ((unsigned long int *)(adapter->login_buf))[i]); 1886 } 1887 1888 memset(&crq, 0, sizeof(crq)); 1889 crq.login.first = IBMVNIC_CRQ_CMD; 1890 crq.login.cmd = LOGIN; 1891 crq.login.ioba = cpu_to_be32(buffer_token); 1892 crq.login.len = cpu_to_be32(buffer_size); 1893 1894 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 1895 1896 spin_lock_irqsave(&adapter->inflight_lock, flags); 1897 list_add_tail(&inflight_cmd->list, &adapter->inflight); 1898 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 1899 1900 ibmvnic_send_crq(adapter, &crq); 1901 1902 return; 1903 1904 inflight_alloc_failed: 1905 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 1906 DMA_FROM_DEVICE); 1907 buf_rsp_map_failed: 1908 kfree(login_rsp_buffer); 1909 buf_rsp_alloc_failed: 1910 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 1911 buf_map_failed: 1912 kfree(login_buffer); 1913 buf_alloc_failed: 1914 return; 1915 } 1916 1917 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 1918 u32 len, u8 map_id) 1919 { 1920 union ibmvnic_crq crq; 1921 1922 memset(&crq, 0, sizeof(crq)); 1923 crq.request_map.first = IBMVNIC_CRQ_CMD; 1924 crq.request_map.cmd = REQUEST_MAP; 1925 crq.request_map.map_id = map_id; 1926 crq.request_map.ioba = cpu_to_be32(addr); 1927 crq.request_map.len = cpu_to_be32(len); 1928 ibmvnic_send_crq(adapter, &crq); 1929 } 1930 1931 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 1932 { 1933 union ibmvnic_crq crq; 1934 1935 memset(&crq, 0, sizeof(crq)); 1936 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 1937 crq.request_unmap.cmd = REQUEST_UNMAP; 1938 crq.request_unmap.map_id = map_id; 1939 ibmvnic_send_crq(adapter, &crq); 1940 } 1941 1942 static void send_map_query(struct ibmvnic_adapter *adapter) 1943 { 1944 union ibmvnic_crq crq; 1945 1946 memset(&crq, 0, sizeof(crq)); 1947 crq.query_map.first = IBMVNIC_CRQ_CMD; 1948 crq.query_map.cmd = QUERY_MAP; 1949 ibmvnic_send_crq(adapter, &crq); 1950 } 1951 1952 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 1953 static void send_cap_queries(struct ibmvnic_adapter *adapter) 1954 { 1955 union ibmvnic_crq crq; 1956 1957 atomic_set(&adapter->running_cap_queries, 0); 1958 memset(&crq, 0, sizeof(crq)); 1959 crq.query_capability.first = IBMVNIC_CRQ_CMD; 1960 crq.query_capability.cmd = QUERY_CAPABILITY; 1961 1962 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 1963 atomic_inc(&adapter->running_cap_queries); 1964 ibmvnic_send_crq(adapter, &crq); 1965 1966 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 1967 atomic_inc(&adapter->running_cap_queries); 1968 ibmvnic_send_crq(adapter, &crq); 1969 1970 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 1971 atomic_inc(&adapter->running_cap_queries); 1972 ibmvnic_send_crq(adapter, &crq); 1973 1974 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 1975 atomic_inc(&adapter->running_cap_queries); 1976 ibmvnic_send_crq(adapter, &crq); 1977 1978 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 1979 atomic_inc(&adapter->running_cap_queries); 1980 ibmvnic_send_crq(adapter, &crq); 1981 1982 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 1983 atomic_inc(&adapter->running_cap_queries); 1984 ibmvnic_send_crq(adapter, &crq); 1985 1986 crq.query_capability.capability = 1987 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 1988 atomic_inc(&adapter->running_cap_queries); 1989 ibmvnic_send_crq(adapter, &crq); 1990 1991 crq.query_capability.capability = 1992 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 1993 atomic_inc(&adapter->running_cap_queries); 1994 ibmvnic_send_crq(adapter, &crq); 1995 1996 crq.query_capability.capability = 1997 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 1998 atomic_inc(&adapter->running_cap_queries); 1999 ibmvnic_send_crq(adapter, &crq); 2000 2001 crq.query_capability.capability = 2002 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2003 atomic_inc(&adapter->running_cap_queries); 2004 ibmvnic_send_crq(adapter, &crq); 2005 2006 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2007 atomic_inc(&adapter->running_cap_queries); 2008 ibmvnic_send_crq(adapter, &crq); 2009 2010 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2011 atomic_inc(&adapter->running_cap_queries); 2012 ibmvnic_send_crq(adapter, &crq); 2013 2014 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2015 atomic_inc(&adapter->running_cap_queries); 2016 ibmvnic_send_crq(adapter, &crq); 2017 2018 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2019 atomic_inc(&adapter->running_cap_queries); 2020 ibmvnic_send_crq(adapter, &crq); 2021 2022 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2023 atomic_inc(&adapter->running_cap_queries); 2024 ibmvnic_send_crq(adapter, &crq); 2025 2026 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2027 atomic_inc(&adapter->running_cap_queries); 2028 ibmvnic_send_crq(adapter, &crq); 2029 2030 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2031 atomic_inc(&adapter->running_cap_queries); 2032 ibmvnic_send_crq(adapter, &crq); 2033 2034 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2035 atomic_inc(&adapter->running_cap_queries); 2036 ibmvnic_send_crq(adapter, &crq); 2037 2038 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2039 atomic_inc(&adapter->running_cap_queries); 2040 ibmvnic_send_crq(adapter, &crq); 2041 2042 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2043 atomic_inc(&adapter->running_cap_queries); 2044 ibmvnic_send_crq(adapter, &crq); 2045 2046 crq.query_capability.capability = 2047 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2048 atomic_inc(&adapter->running_cap_queries); 2049 ibmvnic_send_crq(adapter, &crq); 2050 2051 crq.query_capability.capability = 2052 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2053 atomic_inc(&adapter->running_cap_queries); 2054 ibmvnic_send_crq(adapter, &crq); 2055 2056 crq.query_capability.capability = 2057 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2058 atomic_inc(&adapter->running_cap_queries); 2059 ibmvnic_send_crq(adapter, &crq); 2060 2061 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2062 atomic_inc(&adapter->running_cap_queries); 2063 ibmvnic_send_crq(adapter, &crq); 2064 } 2065 2066 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2067 { 2068 struct device *dev = &adapter->vdev->dev; 2069 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2070 union ibmvnic_crq crq; 2071 int i; 2072 2073 dma_unmap_single(dev, adapter->ip_offload_tok, 2074 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2075 2076 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2077 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2078 netdev_dbg(adapter->netdev, "%016lx\n", 2079 ((unsigned long int *)(buf))[i]); 2080 2081 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2082 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2083 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2084 buf->tcp_ipv4_chksum); 2085 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2086 buf->tcp_ipv6_chksum); 2087 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2088 buf->udp_ipv4_chksum); 2089 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2090 buf->udp_ipv6_chksum); 2091 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2092 buf->large_tx_ipv4); 2093 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2094 buf->large_tx_ipv6); 2095 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2096 buf->large_rx_ipv4); 2097 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2098 buf->large_rx_ipv6); 2099 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2100 buf->max_ipv4_header_size); 2101 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2102 buf->max_ipv6_header_size); 2103 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2104 buf->max_tcp_header_size); 2105 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2106 buf->max_udp_header_size); 2107 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2108 buf->max_large_tx_size); 2109 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2110 buf->max_large_rx_size); 2111 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2112 buf->ipv6_extension_header); 2113 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2114 buf->tcp_pseudosum_req); 2115 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2116 buf->num_ipv6_ext_headers); 2117 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2118 buf->off_ipv6_ext_headers); 2119 2120 adapter->ip_offload_ctrl_tok = 2121 dma_map_single(dev, &adapter->ip_offload_ctrl, 2122 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2123 2124 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2125 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2126 return; 2127 } 2128 2129 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2130 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2131 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2132 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2133 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2134 2135 /* large_tx/rx disabled for now, additional features needed */ 2136 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2137 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2138 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2139 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2140 2141 adapter->netdev->features = NETIF_F_GSO; 2142 2143 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2144 adapter->netdev->features |= NETIF_F_IP_CSUM; 2145 2146 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2147 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2148 2149 if ((adapter->netdev->features & 2150 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2151 adapter->netdev->features |= NETIF_F_RXCSUM; 2152 2153 memset(&crq, 0, sizeof(crq)); 2154 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2155 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2156 crq.control_ip_offload.len = 2157 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2158 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2159 ibmvnic_send_crq(adapter, &crq); 2160 } 2161 2162 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2163 struct ibmvnic_adapter *adapter) 2164 { 2165 struct device *dev = &adapter->vdev->dev; 2166 struct ibmvnic_error_buff *error_buff, *tmp; 2167 unsigned long flags; 2168 bool found = false; 2169 int i; 2170 2171 if (!crq->request_error_rsp.rc.code) { 2172 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2173 crq->request_error_rsp.rc.code); 2174 return; 2175 } 2176 2177 spin_lock_irqsave(&adapter->error_list_lock, flags); 2178 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2179 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2180 found = true; 2181 list_del(&error_buff->list); 2182 break; 2183 } 2184 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2185 2186 if (!found) { 2187 dev_err(dev, "Couldn't find error id %x\n", 2188 crq->request_error_rsp.error_id); 2189 return; 2190 } 2191 2192 dev_err(dev, "Detailed info for error id %x:", 2193 crq->request_error_rsp.error_id); 2194 2195 for (i = 0; i < error_buff->len; i++) { 2196 pr_cont("%02x", (int)error_buff->buff[i]); 2197 if (i % 8 == 7) 2198 pr_cont(" "); 2199 } 2200 pr_cont("\n"); 2201 2202 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2203 DMA_FROM_DEVICE); 2204 kfree(error_buff->buff); 2205 kfree(error_buff); 2206 } 2207 2208 static void handle_dump_size_rsp(union ibmvnic_crq *crq, 2209 struct ibmvnic_adapter *adapter) 2210 { 2211 int len = be32_to_cpu(crq->request_dump_size_rsp.len); 2212 struct ibmvnic_inflight_cmd *inflight_cmd; 2213 struct device *dev = &adapter->vdev->dev; 2214 union ibmvnic_crq newcrq; 2215 unsigned long flags; 2216 2217 /* allocate and map buffer */ 2218 adapter->dump_data = kmalloc(len, GFP_KERNEL); 2219 if (!adapter->dump_data) { 2220 complete(&adapter->fw_done); 2221 return; 2222 } 2223 2224 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, 2225 DMA_FROM_DEVICE); 2226 2227 if (dma_mapping_error(dev, adapter->dump_data_token)) { 2228 if (!firmware_has_feature(FW_FEATURE_CMO)) 2229 dev_err(dev, "Couldn't map dump data\n"); 2230 kfree(adapter->dump_data); 2231 complete(&adapter->fw_done); 2232 return; 2233 } 2234 2235 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2236 if (!inflight_cmd) { 2237 dma_unmap_single(dev, adapter->dump_data_token, len, 2238 DMA_FROM_DEVICE); 2239 kfree(adapter->dump_data); 2240 complete(&adapter->fw_done); 2241 return; 2242 } 2243 2244 memset(&newcrq, 0, sizeof(newcrq)); 2245 newcrq.request_dump.first = IBMVNIC_CRQ_CMD; 2246 newcrq.request_dump.cmd = REQUEST_DUMP; 2247 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); 2248 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); 2249 2250 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); 2251 2252 spin_lock_irqsave(&adapter->inflight_lock, flags); 2253 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2254 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2255 2256 ibmvnic_send_crq(adapter, &newcrq); 2257 } 2258 2259 static void handle_error_indication(union ibmvnic_crq *crq, 2260 struct ibmvnic_adapter *adapter) 2261 { 2262 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); 2263 struct ibmvnic_inflight_cmd *inflight_cmd; 2264 struct device *dev = &adapter->vdev->dev; 2265 struct ibmvnic_error_buff *error_buff; 2266 union ibmvnic_crq new_crq; 2267 unsigned long flags; 2268 2269 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2270 crq->error_indication. 2271 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2272 crq->error_indication.error_id, 2273 crq->error_indication.error_cause); 2274 2275 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2276 if (!error_buff) 2277 return; 2278 2279 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2280 if (!error_buff->buff) { 2281 kfree(error_buff); 2282 return; 2283 } 2284 2285 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2286 DMA_FROM_DEVICE); 2287 if (dma_mapping_error(dev, error_buff->dma)) { 2288 if (!firmware_has_feature(FW_FEATURE_CMO)) 2289 dev_err(dev, "Couldn't map error buffer\n"); 2290 kfree(error_buff->buff); 2291 kfree(error_buff); 2292 return; 2293 } 2294 2295 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2296 if (!inflight_cmd) { 2297 dma_unmap_single(dev, error_buff->dma, detail_len, 2298 DMA_FROM_DEVICE); 2299 kfree(error_buff->buff); 2300 kfree(error_buff); 2301 return; 2302 } 2303 2304 error_buff->len = detail_len; 2305 error_buff->error_id = crq->error_indication.error_id; 2306 2307 spin_lock_irqsave(&adapter->error_list_lock, flags); 2308 list_add_tail(&error_buff->list, &adapter->errors); 2309 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2310 2311 memset(&new_crq, 0, sizeof(new_crq)); 2312 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2313 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2314 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2315 new_crq.request_error_info.len = cpu_to_be32(detail_len); 2316 new_crq.request_error_info.error_id = crq->error_indication.error_id; 2317 2318 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2319 2320 spin_lock_irqsave(&adapter->inflight_lock, flags); 2321 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2322 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2323 2324 ibmvnic_send_crq(adapter, &new_crq); 2325 } 2326 2327 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2328 struct ibmvnic_adapter *adapter) 2329 { 2330 struct net_device *netdev = adapter->netdev; 2331 struct device *dev = &adapter->vdev->dev; 2332 long rc; 2333 2334 rc = crq->change_mac_addr_rsp.rc.code; 2335 if (rc) { 2336 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2337 return; 2338 } 2339 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2340 ETH_ALEN); 2341 } 2342 2343 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2344 struct ibmvnic_adapter *adapter) 2345 { 2346 struct device *dev = &adapter->vdev->dev; 2347 u64 *req_value; 2348 char *name; 2349 2350 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2351 case REQ_TX_QUEUES: 2352 req_value = &adapter->req_tx_queues; 2353 name = "tx"; 2354 break; 2355 case REQ_RX_QUEUES: 2356 req_value = &adapter->req_rx_queues; 2357 name = "rx"; 2358 break; 2359 case REQ_RX_ADD_QUEUES: 2360 req_value = &adapter->req_rx_add_queues; 2361 name = "rx_add"; 2362 break; 2363 case REQ_TX_ENTRIES_PER_SUBCRQ: 2364 req_value = &adapter->req_tx_entries_per_subcrq; 2365 name = "tx_entries_per_subcrq"; 2366 break; 2367 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2368 req_value = &adapter->req_rx_add_entries_per_subcrq; 2369 name = "rx_add_entries_per_subcrq"; 2370 break; 2371 case REQ_MTU: 2372 req_value = &adapter->req_mtu; 2373 name = "mtu"; 2374 break; 2375 case PROMISC_REQUESTED: 2376 req_value = &adapter->promisc; 2377 name = "promisc"; 2378 break; 2379 default: 2380 dev_err(dev, "Got invalid cap request rsp %d\n", 2381 crq->request_capability.capability); 2382 return; 2383 } 2384 2385 switch (crq->request_capability_rsp.rc.code) { 2386 case SUCCESS: 2387 break; 2388 case PARTIALSUCCESS: 2389 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2390 *req_value, 2391 (long int)be32_to_cpu(crq->request_capability_rsp. 2392 number), name); 2393 release_sub_crqs_no_irqs(adapter); 2394 *req_value = be32_to_cpu(crq->request_capability_rsp.number); 2395 init_sub_crqs(adapter, 1); 2396 return; 2397 default: 2398 dev_err(dev, "Error %d in request cap rsp\n", 2399 crq->request_capability_rsp.rc.code); 2400 return; 2401 } 2402 2403 /* Done receiving requested capabilities, query IP offload support */ 2404 if (++adapter->requested_caps == 7) { 2405 union ibmvnic_crq newcrq; 2406 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2407 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2408 &adapter->ip_offload_buf; 2409 2410 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2411 buf_sz, 2412 DMA_FROM_DEVICE); 2413 2414 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2415 if (!firmware_has_feature(FW_FEATURE_CMO)) 2416 dev_err(dev, "Couldn't map offload buffer\n"); 2417 return; 2418 } 2419 2420 memset(&newcrq, 0, sizeof(newcrq)); 2421 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2422 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2423 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2424 newcrq.query_ip_offload.ioba = 2425 cpu_to_be32(adapter->ip_offload_tok); 2426 2427 ibmvnic_send_crq(adapter, &newcrq); 2428 } 2429 } 2430 2431 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2432 struct ibmvnic_adapter *adapter) 2433 { 2434 struct device *dev = &adapter->vdev->dev; 2435 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2436 struct ibmvnic_login_buffer *login = adapter->login_buf; 2437 union ibmvnic_crq crq; 2438 int i; 2439 2440 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2441 DMA_BIDIRECTIONAL); 2442 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2443 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2444 2445 /* If the number of queues requested can't be allocated by the 2446 * server, the login response will return with code 1. We will need 2447 * to resend the login buffer with fewer queues requested. 2448 */ 2449 if (login_rsp_crq->generic.rc.code) { 2450 adapter->renegotiate = true; 2451 complete(&adapter->init_done); 2452 return 0; 2453 } 2454 2455 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2456 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2457 netdev_dbg(adapter->netdev, "%016lx\n", 2458 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2459 } 2460 2461 /* Sanity checks */ 2462 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2463 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2464 adapter->req_rx_add_queues != 2465 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2466 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2467 ibmvnic_remove(adapter->vdev); 2468 return -EIO; 2469 } 2470 complete(&adapter->init_done); 2471 2472 memset(&crq, 0, sizeof(crq)); 2473 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; 2474 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; 2475 ibmvnic_send_crq(adapter, &crq); 2476 2477 return 0; 2478 } 2479 2480 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2481 struct ibmvnic_adapter *adapter) 2482 { 2483 struct device *dev = &adapter->vdev->dev; 2484 u8 map_id = crq->request_map_rsp.map_id; 2485 int tx_subcrqs; 2486 int rx_subcrqs; 2487 long rc; 2488 int i; 2489 2490 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2491 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2492 2493 rc = crq->request_map_rsp.rc.code; 2494 if (rc) { 2495 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2496 adapter->map_id--; 2497 /* need to find and zero tx/rx_pool map_id */ 2498 for (i = 0; i < tx_subcrqs; i++) { 2499 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2500 adapter->tx_pool[i].long_term_buff.map_id = 0; 2501 } 2502 for (i = 0; i < rx_subcrqs; i++) { 2503 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2504 adapter->rx_pool[i].long_term_buff.map_id = 0; 2505 } 2506 } 2507 complete(&adapter->fw_done); 2508 } 2509 2510 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2511 struct ibmvnic_adapter *adapter) 2512 { 2513 struct device *dev = &adapter->vdev->dev; 2514 long rc; 2515 2516 rc = crq->request_unmap_rsp.rc.code; 2517 if (rc) 2518 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2519 } 2520 2521 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2522 struct ibmvnic_adapter *adapter) 2523 { 2524 struct net_device *netdev = adapter->netdev; 2525 struct device *dev = &adapter->vdev->dev; 2526 long rc; 2527 2528 rc = crq->query_map_rsp.rc.code; 2529 if (rc) { 2530 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2531 return; 2532 } 2533 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2534 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2535 crq->query_map_rsp.free_pages); 2536 } 2537 2538 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2539 struct ibmvnic_adapter *adapter) 2540 { 2541 struct net_device *netdev = adapter->netdev; 2542 struct device *dev = &adapter->vdev->dev; 2543 long rc; 2544 2545 atomic_dec(&adapter->running_cap_queries); 2546 netdev_dbg(netdev, "Outstanding queries: %d\n", 2547 atomic_read(&adapter->running_cap_queries)); 2548 rc = crq->query_capability.rc.code; 2549 if (rc) { 2550 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2551 goto out; 2552 } 2553 2554 switch (be16_to_cpu(crq->query_capability.capability)) { 2555 case MIN_TX_QUEUES: 2556 adapter->min_tx_queues = 2557 be64_to_cpu(crq->query_capability.number); 2558 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2559 adapter->min_tx_queues); 2560 break; 2561 case MIN_RX_QUEUES: 2562 adapter->min_rx_queues = 2563 be64_to_cpu(crq->query_capability.number); 2564 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2565 adapter->min_rx_queues); 2566 break; 2567 case MIN_RX_ADD_QUEUES: 2568 adapter->min_rx_add_queues = 2569 be64_to_cpu(crq->query_capability.number); 2570 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2571 adapter->min_rx_add_queues); 2572 break; 2573 case MAX_TX_QUEUES: 2574 adapter->max_tx_queues = 2575 be64_to_cpu(crq->query_capability.number); 2576 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2577 adapter->max_tx_queues); 2578 break; 2579 case MAX_RX_QUEUES: 2580 adapter->max_rx_queues = 2581 be64_to_cpu(crq->query_capability.number); 2582 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2583 adapter->max_rx_queues); 2584 break; 2585 case MAX_RX_ADD_QUEUES: 2586 adapter->max_rx_add_queues = 2587 be64_to_cpu(crq->query_capability.number); 2588 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2589 adapter->max_rx_add_queues); 2590 break; 2591 case MIN_TX_ENTRIES_PER_SUBCRQ: 2592 adapter->min_tx_entries_per_subcrq = 2593 be64_to_cpu(crq->query_capability.number); 2594 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2595 adapter->min_tx_entries_per_subcrq); 2596 break; 2597 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2598 adapter->min_rx_add_entries_per_subcrq = 2599 be64_to_cpu(crq->query_capability.number); 2600 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2601 adapter->min_rx_add_entries_per_subcrq); 2602 break; 2603 case MAX_TX_ENTRIES_PER_SUBCRQ: 2604 adapter->max_tx_entries_per_subcrq = 2605 be64_to_cpu(crq->query_capability.number); 2606 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2607 adapter->max_tx_entries_per_subcrq); 2608 break; 2609 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2610 adapter->max_rx_add_entries_per_subcrq = 2611 be64_to_cpu(crq->query_capability.number); 2612 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2613 adapter->max_rx_add_entries_per_subcrq); 2614 break; 2615 case TCP_IP_OFFLOAD: 2616 adapter->tcp_ip_offload = 2617 be64_to_cpu(crq->query_capability.number); 2618 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2619 adapter->tcp_ip_offload); 2620 break; 2621 case PROMISC_SUPPORTED: 2622 adapter->promisc_supported = 2623 be64_to_cpu(crq->query_capability.number); 2624 netdev_dbg(netdev, "promisc_supported = %lld\n", 2625 adapter->promisc_supported); 2626 break; 2627 case MIN_MTU: 2628 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2629 netdev->min_mtu = adapter->min_mtu; 2630 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2631 break; 2632 case MAX_MTU: 2633 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2634 netdev->max_mtu = adapter->max_mtu; 2635 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2636 break; 2637 case MAX_MULTICAST_FILTERS: 2638 adapter->max_multicast_filters = 2639 be64_to_cpu(crq->query_capability.number); 2640 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2641 adapter->max_multicast_filters); 2642 break; 2643 case VLAN_HEADER_INSERTION: 2644 adapter->vlan_header_insertion = 2645 be64_to_cpu(crq->query_capability.number); 2646 if (adapter->vlan_header_insertion) 2647 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2648 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2649 adapter->vlan_header_insertion); 2650 break; 2651 case MAX_TX_SG_ENTRIES: 2652 adapter->max_tx_sg_entries = 2653 be64_to_cpu(crq->query_capability.number); 2654 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2655 adapter->max_tx_sg_entries); 2656 break; 2657 case RX_SG_SUPPORTED: 2658 adapter->rx_sg_supported = 2659 be64_to_cpu(crq->query_capability.number); 2660 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2661 adapter->rx_sg_supported); 2662 break; 2663 case OPT_TX_COMP_SUB_QUEUES: 2664 adapter->opt_tx_comp_sub_queues = 2665 be64_to_cpu(crq->query_capability.number); 2666 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2667 adapter->opt_tx_comp_sub_queues); 2668 break; 2669 case OPT_RX_COMP_QUEUES: 2670 adapter->opt_rx_comp_queues = 2671 be64_to_cpu(crq->query_capability.number); 2672 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2673 adapter->opt_rx_comp_queues); 2674 break; 2675 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2676 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2677 be64_to_cpu(crq->query_capability.number); 2678 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2679 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2680 break; 2681 case OPT_TX_ENTRIES_PER_SUBCRQ: 2682 adapter->opt_tx_entries_per_subcrq = 2683 be64_to_cpu(crq->query_capability.number); 2684 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2685 adapter->opt_tx_entries_per_subcrq); 2686 break; 2687 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2688 adapter->opt_rxba_entries_per_subcrq = 2689 be64_to_cpu(crq->query_capability.number); 2690 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2691 adapter->opt_rxba_entries_per_subcrq); 2692 break; 2693 case TX_RX_DESC_REQ: 2694 adapter->tx_rx_desc_req = crq->query_capability.number; 2695 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2696 adapter->tx_rx_desc_req); 2697 break; 2698 2699 default: 2700 netdev_err(netdev, "Got invalid cap rsp %d\n", 2701 crq->query_capability.capability); 2702 } 2703 2704 out: 2705 if (atomic_read(&adapter->running_cap_queries) == 0) 2706 init_sub_crqs(adapter, 0); 2707 /* We're done querying the capabilities, initialize sub-crqs */ 2708 } 2709 2710 static void handle_control_ras_rsp(union ibmvnic_crq *crq, 2711 struct ibmvnic_adapter *adapter) 2712 { 2713 u8 correlator = crq->control_ras_rsp.correlator; 2714 struct device *dev = &adapter->vdev->dev; 2715 bool found = false; 2716 int i; 2717 2718 if (crq->control_ras_rsp.rc.code) { 2719 dev_warn(dev, "Control ras failed rc=%d\n", 2720 crq->control_ras_rsp.rc.code); 2721 return; 2722 } 2723 2724 for (i = 0; i < adapter->ras_comp_num; i++) { 2725 if (adapter->ras_comps[i].correlator == correlator) { 2726 found = true; 2727 break; 2728 } 2729 } 2730 2731 if (!found) { 2732 dev_warn(dev, "Correlator not found on control_ras_rsp\n"); 2733 return; 2734 } 2735 2736 switch (crq->control_ras_rsp.op) { 2737 case IBMVNIC_TRACE_LEVEL: 2738 adapter->ras_comps[i].trace_level = crq->control_ras.level; 2739 break; 2740 case IBMVNIC_ERROR_LEVEL: 2741 adapter->ras_comps[i].error_check_level = 2742 crq->control_ras.level; 2743 break; 2744 case IBMVNIC_TRACE_PAUSE: 2745 adapter->ras_comp_int[i].paused = 1; 2746 break; 2747 case IBMVNIC_TRACE_RESUME: 2748 adapter->ras_comp_int[i].paused = 0; 2749 break; 2750 case IBMVNIC_TRACE_ON: 2751 adapter->ras_comps[i].trace_on = 1; 2752 break; 2753 case IBMVNIC_TRACE_OFF: 2754 adapter->ras_comps[i].trace_on = 0; 2755 break; 2756 case IBMVNIC_CHG_TRACE_BUFF_SZ: 2757 /* trace_buff_sz is 3 bytes, stuff it into an int */ 2758 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; 2759 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = 2760 crq->control_ras_rsp.trace_buff_sz[0]; 2761 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = 2762 crq->control_ras_rsp.trace_buff_sz[1]; 2763 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = 2764 crq->control_ras_rsp.trace_buff_sz[2]; 2765 break; 2766 default: 2767 dev_err(dev, "invalid op %d on control_ras_rsp", 2768 crq->control_ras_rsp.op); 2769 } 2770 } 2771 2772 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, 2773 loff_t *ppos) 2774 { 2775 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2776 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2777 struct device *dev = &adapter->vdev->dev; 2778 struct ibmvnic_fw_trace_entry *trace; 2779 int num = ras_comp_int->num; 2780 union ibmvnic_crq crq; 2781 dma_addr_t trace_tok; 2782 2783 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2784 return 0; 2785 2786 trace = 2787 dma_alloc_coherent(dev, 2788 be32_to_cpu(adapter->ras_comps[num]. 2789 trace_buff_size), &trace_tok, 2790 GFP_KERNEL); 2791 if (!trace) { 2792 dev_err(dev, "Couldn't alloc trace buffer\n"); 2793 return 0; 2794 } 2795 2796 memset(&crq, 0, sizeof(crq)); 2797 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; 2798 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; 2799 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; 2800 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); 2801 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; 2802 ibmvnic_send_crq(adapter, &crq); 2803 2804 init_completion(&adapter->fw_done); 2805 wait_for_completion(&adapter->fw_done); 2806 2807 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2808 len = 2809 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - 2810 *ppos; 2811 2812 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); 2813 2814 dma_free_coherent(dev, 2815 be32_to_cpu(adapter->ras_comps[num].trace_buff_size), 2816 trace, trace_tok); 2817 *ppos += len; 2818 return len; 2819 } 2820 2821 static const struct file_operations trace_ops = { 2822 .owner = THIS_MODULE, 2823 .open = simple_open, 2824 .read = trace_read, 2825 }; 2826 2827 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, 2828 loff_t *ppos) 2829 { 2830 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2831 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2832 int num = ras_comp_int->num; 2833 char buff[5]; /* 1 or 0 plus \n and \0 */ 2834 int size; 2835 2836 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); 2837 2838 if (*ppos >= size) 2839 return 0; 2840 2841 copy_to_user(user_buf, buff, size); 2842 *ppos += size; 2843 return size; 2844 } 2845 2846 static ssize_t paused_write(struct file *file, const char __user *user_buf, 2847 size_t len, loff_t *ppos) 2848 { 2849 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2850 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2851 int num = ras_comp_int->num; 2852 union ibmvnic_crq crq; 2853 unsigned long val; 2854 char buff[9]; /* decimal max int plus \n and \0 */ 2855 2856 copy_from_user(buff, user_buf, sizeof(buff)); 2857 val = kstrtoul(buff, 10, NULL); 2858 2859 adapter->ras_comp_int[num].paused = val ? 1 : 0; 2860 2861 memset(&crq, 0, sizeof(crq)); 2862 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2863 crq.control_ras.cmd = CONTROL_RAS; 2864 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2865 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; 2866 ibmvnic_send_crq(adapter, &crq); 2867 2868 return len; 2869 } 2870 2871 static const struct file_operations paused_ops = { 2872 .owner = THIS_MODULE, 2873 .open = simple_open, 2874 .read = paused_read, 2875 .write = paused_write, 2876 }; 2877 2878 static ssize_t tracing_read(struct file *file, char __user *user_buf, 2879 size_t len, loff_t *ppos) 2880 { 2881 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2882 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2883 int num = ras_comp_int->num; 2884 char buff[5]; /* 1 or 0 plus \n and \0 */ 2885 int size; 2886 2887 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); 2888 2889 if (*ppos >= size) 2890 return 0; 2891 2892 copy_to_user(user_buf, buff, size); 2893 *ppos += size; 2894 return size; 2895 } 2896 2897 static ssize_t tracing_write(struct file *file, const char __user *user_buf, 2898 size_t len, loff_t *ppos) 2899 { 2900 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2901 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2902 int num = ras_comp_int->num; 2903 union ibmvnic_crq crq; 2904 unsigned long val; 2905 char buff[9]; /* decimal max int plus \n and \0 */ 2906 2907 copy_from_user(buff, user_buf, sizeof(buff)); 2908 val = kstrtoul(buff, 10, NULL); 2909 2910 memset(&crq, 0, sizeof(crq)); 2911 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2912 crq.control_ras.cmd = CONTROL_RAS; 2913 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2914 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; 2915 2916 return len; 2917 } 2918 2919 static const struct file_operations tracing_ops = { 2920 .owner = THIS_MODULE, 2921 .open = simple_open, 2922 .read = tracing_read, 2923 .write = tracing_write, 2924 }; 2925 2926 static ssize_t error_level_read(struct file *file, char __user *user_buf, 2927 size_t len, loff_t *ppos) 2928 { 2929 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2930 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2931 int num = ras_comp_int->num; 2932 char buff[5]; /* decimal max char plus \n and \0 */ 2933 int size; 2934 2935 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); 2936 2937 if (*ppos >= size) 2938 return 0; 2939 2940 copy_to_user(user_buf, buff, size); 2941 *ppos += size; 2942 return size; 2943 } 2944 2945 static ssize_t error_level_write(struct file *file, const char __user *user_buf, 2946 size_t len, loff_t *ppos) 2947 { 2948 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2949 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2950 int num = ras_comp_int->num; 2951 union ibmvnic_crq crq; 2952 unsigned long val; 2953 char buff[9]; /* decimal max int plus \n and \0 */ 2954 2955 copy_from_user(buff, user_buf, sizeof(buff)); 2956 val = kstrtoul(buff, 10, NULL); 2957 2958 if (val > 9) 2959 val = 9; 2960 2961 memset(&crq, 0, sizeof(crq)); 2962 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2963 crq.control_ras.cmd = CONTROL_RAS; 2964 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2965 crq.control_ras.op = IBMVNIC_ERROR_LEVEL; 2966 crq.control_ras.level = val; 2967 ibmvnic_send_crq(adapter, &crq); 2968 2969 return len; 2970 } 2971 2972 static const struct file_operations error_level_ops = { 2973 .owner = THIS_MODULE, 2974 .open = simple_open, 2975 .read = error_level_read, 2976 .write = error_level_write, 2977 }; 2978 2979 static ssize_t trace_level_read(struct file *file, char __user *user_buf, 2980 size_t len, loff_t *ppos) 2981 { 2982 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2983 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2984 int num = ras_comp_int->num; 2985 char buff[5]; /* decimal max char plus \n and \0 */ 2986 int size; 2987 2988 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); 2989 if (*ppos >= size) 2990 return 0; 2991 2992 copy_to_user(user_buf, buff, size); 2993 *ppos += size; 2994 return size; 2995 } 2996 2997 static ssize_t trace_level_write(struct file *file, const char __user *user_buf, 2998 size_t len, loff_t *ppos) 2999 { 3000 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3001 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3002 union ibmvnic_crq crq; 3003 unsigned long val; 3004 char buff[9]; /* decimal max int plus \n and \0 */ 3005 3006 copy_from_user(buff, user_buf, sizeof(buff)); 3007 val = kstrtoul(buff, 10, NULL); 3008 if (val > 9) 3009 val = 9; 3010 3011 memset(&crq, 0, sizeof(crq)); 3012 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3013 crq.control_ras.cmd = CONTROL_RAS; 3014 crq.control_ras.correlator = 3015 adapter->ras_comps[ras_comp_int->num].correlator; 3016 crq.control_ras.op = IBMVNIC_TRACE_LEVEL; 3017 crq.control_ras.level = val; 3018 ibmvnic_send_crq(adapter, &crq); 3019 3020 return len; 3021 } 3022 3023 static const struct file_operations trace_level_ops = { 3024 .owner = THIS_MODULE, 3025 .open = simple_open, 3026 .read = trace_level_read, 3027 .write = trace_level_write, 3028 }; 3029 3030 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, 3031 size_t len, loff_t *ppos) 3032 { 3033 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3034 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3035 int num = ras_comp_int->num; 3036 char buff[9]; /* decimal max int plus \n and \0 */ 3037 int size; 3038 3039 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); 3040 if (*ppos >= size) 3041 return 0; 3042 3043 copy_to_user(user_buf, buff, size); 3044 *ppos += size; 3045 return size; 3046 } 3047 3048 static ssize_t trace_buff_size_write(struct file *file, 3049 const char __user *user_buf, size_t len, 3050 loff_t *ppos) 3051 { 3052 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3053 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3054 union ibmvnic_crq crq; 3055 unsigned long val; 3056 char buff[9]; /* decimal max int plus \n and \0 */ 3057 3058 copy_from_user(buff, user_buf, sizeof(buff)); 3059 val = kstrtoul(buff, 10, NULL); 3060 3061 memset(&crq, 0, sizeof(crq)); 3062 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3063 crq.control_ras.cmd = CONTROL_RAS; 3064 crq.control_ras.correlator = 3065 adapter->ras_comps[ras_comp_int->num].correlator; 3066 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; 3067 /* trace_buff_sz is 3 bytes, stuff an int into it */ 3068 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; 3069 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; 3070 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; 3071 ibmvnic_send_crq(adapter, &crq); 3072 3073 return len; 3074 } 3075 3076 static const struct file_operations trace_size_ops = { 3077 .owner = THIS_MODULE, 3078 .open = simple_open, 3079 .read = trace_buff_size_read, 3080 .write = trace_buff_size_write, 3081 }; 3082 3083 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, 3084 struct ibmvnic_adapter *adapter) 3085 { 3086 struct device *dev = &adapter->vdev->dev; 3087 struct dentry *dir_ent; 3088 struct dentry *ent; 3089 int i; 3090 3091 debugfs_remove_recursive(adapter->ras_comps_ent); 3092 3093 adapter->ras_comps_ent = debugfs_create_dir("ras_comps", 3094 adapter->debugfs_dir); 3095 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { 3096 dev_info(dev, "debugfs create ras_comps dir failed\n"); 3097 return; 3098 } 3099 3100 for (i = 0; i < adapter->ras_comp_num; i++) { 3101 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, 3102 adapter->ras_comps_ent); 3103 if (!dir_ent || IS_ERR(dir_ent)) { 3104 dev_info(dev, "debugfs create %s dir failed\n", 3105 adapter->ras_comps[i].name); 3106 continue; 3107 } 3108 3109 adapter->ras_comp_int[i].adapter = adapter; 3110 adapter->ras_comp_int[i].num = i; 3111 adapter->ras_comp_int[i].desc_blob.data = 3112 &adapter->ras_comps[i].description; 3113 adapter->ras_comp_int[i].desc_blob.size = 3114 sizeof(adapter->ras_comps[i].description); 3115 3116 /* Don't need to remember the dentry's because the debugfs dir 3117 * gets removed recursively 3118 */ 3119 ent = debugfs_create_blob("description", S_IRUGO, dir_ent, 3120 &adapter->ras_comp_int[i].desc_blob); 3121 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, 3122 dir_ent, &adapter->ras_comp_int[i], 3123 &trace_size_ops); 3124 ent = debugfs_create_file("trace_level", 3125 S_IRUGO | 3126 (adapter->ras_comps[i].trace_level != 3127 0xFF ? S_IWUSR : 0), 3128 dir_ent, &adapter->ras_comp_int[i], 3129 &trace_level_ops); 3130 ent = debugfs_create_file("error_level", 3131 S_IRUGO | 3132 (adapter-> 3133 ras_comps[i].error_check_level != 3134 0xFF ? S_IWUSR : 0), 3135 dir_ent, &adapter->ras_comp_int[i], 3136 &trace_level_ops); 3137 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, 3138 dir_ent, &adapter->ras_comp_int[i], 3139 &tracing_ops); 3140 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, 3141 dir_ent, &adapter->ras_comp_int[i], 3142 &paused_ops); 3143 ent = debugfs_create_file("trace", S_IRUGO, dir_ent, 3144 &adapter->ras_comp_int[i], 3145 &trace_ops); 3146 } 3147 } 3148 3149 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, 3150 struct ibmvnic_adapter *adapter) 3151 { 3152 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); 3153 struct device *dev = &adapter->vdev->dev; 3154 union ibmvnic_crq newcrq; 3155 3156 adapter->ras_comps = dma_alloc_coherent(dev, len, 3157 &adapter->ras_comps_tok, 3158 GFP_KERNEL); 3159 if (!adapter->ras_comps) { 3160 if (!firmware_has_feature(FW_FEATURE_CMO)) 3161 dev_err(dev, "Couldn't alloc fw comps buffer\n"); 3162 return; 3163 } 3164 3165 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * 3166 sizeof(struct ibmvnic_fw_comp_internal), 3167 GFP_KERNEL); 3168 if (!adapter->ras_comp_int) 3169 dma_free_coherent(dev, len, adapter->ras_comps, 3170 adapter->ras_comps_tok); 3171 3172 memset(&newcrq, 0, sizeof(newcrq)); 3173 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; 3174 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; 3175 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); 3176 newcrq.request_ras_comps.len = cpu_to_be32(len); 3177 ibmvnic_send_crq(adapter, &newcrq); 3178 } 3179 3180 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) 3181 { 3182 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; 3183 struct device *dev = &adapter->vdev->dev; 3184 struct ibmvnic_error_buff *error_buff, *tmp2; 3185 unsigned long flags; 3186 unsigned long flags2; 3187 3188 spin_lock_irqsave(&adapter->inflight_lock, flags); 3189 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { 3190 switch (inflight_cmd->crq.generic.cmd) { 3191 case LOGIN: 3192 dma_unmap_single(dev, adapter->login_buf_token, 3193 adapter->login_buf_sz, 3194 DMA_BIDIRECTIONAL); 3195 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3196 adapter->login_rsp_buf_sz, 3197 DMA_BIDIRECTIONAL); 3198 kfree(adapter->login_rsp_buf); 3199 kfree(adapter->login_buf); 3200 break; 3201 case REQUEST_DUMP: 3202 complete(&adapter->fw_done); 3203 break; 3204 case REQUEST_ERROR_INFO: 3205 spin_lock_irqsave(&adapter->error_list_lock, flags2); 3206 list_for_each_entry_safe(error_buff, tmp2, 3207 &adapter->errors, list) { 3208 dma_unmap_single(dev, error_buff->dma, 3209 error_buff->len, 3210 DMA_FROM_DEVICE); 3211 kfree(error_buff->buff); 3212 list_del(&error_buff->list); 3213 kfree(error_buff); 3214 } 3215 spin_unlock_irqrestore(&adapter->error_list_lock, 3216 flags2); 3217 break; 3218 } 3219 list_del(&inflight_cmd->list); 3220 kfree(inflight_cmd); 3221 } 3222 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 3223 } 3224 3225 static void ibmvnic_xport_event(struct work_struct *work) 3226 { 3227 struct ibmvnic_adapter *adapter = container_of(work, 3228 struct ibmvnic_adapter, 3229 ibmvnic_xport); 3230 struct device *dev = &adapter->vdev->dev; 3231 long rc; 3232 3233 ibmvnic_free_inflight(adapter); 3234 release_sub_crqs(adapter); 3235 if (adapter->migrated) { 3236 rc = ibmvnic_reenable_crq_queue(adapter); 3237 if (rc) 3238 dev_err(dev, "Error after enable rc=%ld\n", rc); 3239 adapter->migrated = false; 3240 rc = ibmvnic_send_crq_init(adapter); 3241 if (rc) 3242 dev_err(dev, "Error sending init rc=%ld\n", rc); 3243 } 3244 } 3245 3246 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3247 struct ibmvnic_adapter *adapter) 3248 { 3249 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3250 struct net_device *netdev = adapter->netdev; 3251 struct device *dev = &adapter->vdev->dev; 3252 long rc; 3253 3254 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3255 ((unsigned long int *)crq)[0], 3256 ((unsigned long int *)crq)[1]); 3257 switch (gen_crq->first) { 3258 case IBMVNIC_CRQ_INIT_RSP: 3259 switch (gen_crq->cmd) { 3260 case IBMVNIC_CRQ_INIT: 3261 dev_info(dev, "Partner initialized\n"); 3262 /* Send back a response */ 3263 rc = ibmvnic_send_crq_init_complete(adapter); 3264 if (!rc) 3265 schedule_work(&adapter->vnic_crq_init); 3266 else 3267 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 3268 break; 3269 case IBMVNIC_CRQ_INIT_COMPLETE: 3270 dev_info(dev, "Partner initialization complete\n"); 3271 send_version_xchg(adapter); 3272 break; 3273 default: 3274 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3275 } 3276 return; 3277 case IBMVNIC_CRQ_XPORT_EVENT: 3278 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3279 dev_info(dev, "Re-enabling adapter\n"); 3280 adapter->migrated = true; 3281 schedule_work(&adapter->ibmvnic_xport); 3282 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3283 dev_info(dev, "Backing device failover detected\n"); 3284 netif_carrier_off(netdev); 3285 adapter->failover = true; 3286 } else { 3287 /* The adapter lost the connection */ 3288 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3289 gen_crq->cmd); 3290 schedule_work(&adapter->ibmvnic_xport); 3291 } 3292 return; 3293 case IBMVNIC_CRQ_CMD_RSP: 3294 break; 3295 default: 3296 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3297 gen_crq->first); 3298 return; 3299 } 3300 3301 switch (gen_crq->cmd) { 3302 case VERSION_EXCHANGE_RSP: 3303 rc = crq->version_exchange_rsp.rc.code; 3304 if (rc) { 3305 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3306 break; 3307 } 3308 dev_info(dev, "Partner protocol version is %d\n", 3309 crq->version_exchange_rsp.version); 3310 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3311 ibmvnic_version) 3312 ibmvnic_version = 3313 be16_to_cpu(crq->version_exchange_rsp.version); 3314 send_cap_queries(adapter); 3315 break; 3316 case QUERY_CAPABILITY_RSP: 3317 handle_query_cap_rsp(crq, adapter); 3318 break; 3319 case QUERY_MAP_RSP: 3320 handle_query_map_rsp(crq, adapter); 3321 break; 3322 case REQUEST_MAP_RSP: 3323 handle_request_map_rsp(crq, adapter); 3324 break; 3325 case REQUEST_UNMAP_RSP: 3326 handle_request_unmap_rsp(crq, adapter); 3327 break; 3328 case REQUEST_CAPABILITY_RSP: 3329 handle_request_cap_rsp(crq, adapter); 3330 break; 3331 case LOGIN_RSP: 3332 netdev_dbg(netdev, "Got Login Response\n"); 3333 handle_login_rsp(crq, adapter); 3334 break; 3335 case LOGICAL_LINK_STATE_RSP: 3336 netdev_dbg(netdev, "Got Logical Link State Response\n"); 3337 adapter->logical_link_state = 3338 crq->logical_link_state_rsp.link_state; 3339 break; 3340 case LINK_STATE_INDICATION: 3341 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3342 adapter->phys_link_state = 3343 crq->link_state_indication.phys_link_state; 3344 adapter->logical_link_state = 3345 crq->link_state_indication.logical_link_state; 3346 break; 3347 case CHANGE_MAC_ADDR_RSP: 3348 netdev_dbg(netdev, "Got MAC address change Response\n"); 3349 handle_change_mac_rsp(crq, adapter); 3350 break; 3351 case ERROR_INDICATION: 3352 netdev_dbg(netdev, "Got Error Indication\n"); 3353 handle_error_indication(crq, adapter); 3354 break; 3355 case REQUEST_ERROR_RSP: 3356 netdev_dbg(netdev, "Got Error Detail Response\n"); 3357 handle_error_info_rsp(crq, adapter); 3358 break; 3359 case REQUEST_STATISTICS_RSP: 3360 netdev_dbg(netdev, "Got Statistics Response\n"); 3361 complete(&adapter->stats_done); 3362 break; 3363 case REQUEST_DUMP_SIZE_RSP: 3364 netdev_dbg(netdev, "Got Request Dump Size Response\n"); 3365 handle_dump_size_rsp(crq, adapter); 3366 break; 3367 case REQUEST_DUMP_RSP: 3368 netdev_dbg(netdev, "Got Request Dump Response\n"); 3369 complete(&adapter->fw_done); 3370 break; 3371 case QUERY_IP_OFFLOAD_RSP: 3372 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3373 handle_query_ip_offload_rsp(adapter); 3374 break; 3375 case MULTICAST_CTRL_RSP: 3376 netdev_dbg(netdev, "Got multicast control Response\n"); 3377 break; 3378 case CONTROL_IP_OFFLOAD_RSP: 3379 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3380 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3381 sizeof(adapter->ip_offload_ctrl), 3382 DMA_TO_DEVICE); 3383 /* We're done with the queries, perform the login */ 3384 send_login(adapter); 3385 break; 3386 case REQUEST_RAS_COMP_NUM_RSP: 3387 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); 3388 if (crq->request_ras_comp_num_rsp.rc.code == 10) { 3389 netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); 3390 break; 3391 } 3392 adapter->ras_comp_num = 3393 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); 3394 handle_request_ras_comp_num_rsp(crq, adapter); 3395 break; 3396 case REQUEST_RAS_COMPS_RSP: 3397 netdev_dbg(netdev, "Got Request RAS Comps Response\n"); 3398 handle_request_ras_comps_rsp(crq, adapter); 3399 break; 3400 case CONTROL_RAS_RSP: 3401 netdev_dbg(netdev, "Got Control RAS Response\n"); 3402 handle_control_ras_rsp(crq, adapter); 3403 break; 3404 case COLLECT_FW_TRACE_RSP: 3405 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3406 complete(&adapter->fw_done); 3407 break; 3408 default: 3409 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3410 gen_crq->cmd); 3411 } 3412 } 3413 3414 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3415 { 3416 struct ibmvnic_adapter *adapter = instance; 3417 struct ibmvnic_crq_queue *queue = &adapter->crq; 3418 struct vio_dev *vdev = adapter->vdev; 3419 union ibmvnic_crq *crq; 3420 unsigned long flags; 3421 bool done = false; 3422 3423 spin_lock_irqsave(&queue->lock, flags); 3424 vio_disable_interrupts(vdev); 3425 while (!done) { 3426 /* Pull all the valid messages off the CRQ */ 3427 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3428 ibmvnic_handle_crq(crq, adapter); 3429 crq->generic.first = 0; 3430 } 3431 vio_enable_interrupts(vdev); 3432 crq = ibmvnic_next_crq(adapter); 3433 if (crq) { 3434 vio_disable_interrupts(vdev); 3435 ibmvnic_handle_crq(crq, adapter); 3436 crq->generic.first = 0; 3437 } else { 3438 done = true; 3439 } 3440 } 3441 spin_unlock_irqrestore(&queue->lock, flags); 3442 return IRQ_HANDLED; 3443 } 3444 3445 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3446 { 3447 struct vio_dev *vdev = adapter->vdev; 3448 int rc; 3449 3450 do { 3451 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3452 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3453 3454 if (rc) 3455 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3456 3457 return rc; 3458 } 3459 3460 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3461 { 3462 struct ibmvnic_crq_queue *crq = &adapter->crq; 3463 struct device *dev = &adapter->vdev->dev; 3464 struct vio_dev *vdev = adapter->vdev; 3465 int rc; 3466 3467 /* Close the CRQ */ 3468 do { 3469 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3470 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3471 3472 /* Clean out the queue */ 3473 memset(crq->msgs, 0, PAGE_SIZE); 3474 crq->cur = 0; 3475 3476 /* And re-open it again */ 3477 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3478 crq->msg_token, PAGE_SIZE); 3479 3480 if (rc == H_CLOSED) 3481 /* Adapter is good, but other end is not ready */ 3482 dev_warn(dev, "Partner adapter not ready\n"); 3483 else if (rc != 0) 3484 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3485 3486 return rc; 3487 } 3488 3489 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) 3490 { 3491 struct ibmvnic_crq_queue *crq = &adapter->crq; 3492 struct vio_dev *vdev = adapter->vdev; 3493 long rc; 3494 3495 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3496 free_irq(vdev->irq, adapter); 3497 do { 3498 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3499 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3500 3501 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3502 DMA_BIDIRECTIONAL); 3503 free_page((unsigned long)crq->msgs); 3504 } 3505 3506 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) 3507 { 3508 struct ibmvnic_crq_queue *crq = &adapter->crq; 3509 struct device *dev = &adapter->vdev->dev; 3510 struct vio_dev *vdev = adapter->vdev; 3511 int rc, retrc = -ENOMEM; 3512 3513 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3514 /* Should we allocate more than one page? */ 3515 3516 if (!crq->msgs) 3517 return -ENOMEM; 3518 3519 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3520 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3521 DMA_BIDIRECTIONAL); 3522 if (dma_mapping_error(dev, crq->msg_token)) 3523 goto map_failed; 3524 3525 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3526 crq->msg_token, PAGE_SIZE); 3527 3528 if (rc == H_RESOURCE) 3529 /* maybe kexecing and resource is busy. try a reset */ 3530 rc = ibmvnic_reset_crq(adapter); 3531 retrc = rc; 3532 3533 if (rc == H_CLOSED) { 3534 dev_warn(dev, "Partner adapter not ready\n"); 3535 } else if (rc) { 3536 dev_warn(dev, "Error %d opening adapter\n", rc); 3537 goto reg_crq_failed; 3538 } 3539 3540 retrc = 0; 3541 3542 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3543 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3544 adapter); 3545 if (rc) { 3546 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3547 vdev->irq, rc); 3548 goto req_irq_failed; 3549 } 3550 3551 rc = vio_enable_interrupts(vdev); 3552 if (rc) { 3553 dev_err(dev, "Error %d enabling interrupts\n", rc); 3554 goto req_irq_failed; 3555 } 3556 3557 crq->cur = 0; 3558 spin_lock_init(&crq->lock); 3559 3560 return retrc; 3561 3562 req_irq_failed: 3563 do { 3564 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3565 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3566 reg_crq_failed: 3567 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3568 map_failed: 3569 free_page((unsigned long)crq->msgs); 3570 return retrc; 3571 } 3572 3573 /* debugfs for dump */ 3574 static int ibmvnic_dump_show(struct seq_file *seq, void *v) 3575 { 3576 struct net_device *netdev = seq->private; 3577 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3578 struct device *dev = &adapter->vdev->dev; 3579 union ibmvnic_crq crq; 3580 3581 memset(&crq, 0, sizeof(crq)); 3582 crq.request_dump_size.first = IBMVNIC_CRQ_CMD; 3583 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; 3584 ibmvnic_send_crq(adapter, &crq); 3585 3586 init_completion(&adapter->fw_done); 3587 wait_for_completion(&adapter->fw_done); 3588 3589 seq_write(seq, adapter->dump_data, adapter->dump_data_size); 3590 3591 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, 3592 DMA_BIDIRECTIONAL); 3593 3594 kfree(adapter->dump_data); 3595 3596 return 0; 3597 } 3598 3599 static int ibmvnic_dump_open(struct inode *inode, struct file *file) 3600 { 3601 return single_open(file, ibmvnic_dump_show, inode->i_private); 3602 } 3603 3604 static const struct file_operations ibmvnic_dump_ops = { 3605 .owner = THIS_MODULE, 3606 .open = ibmvnic_dump_open, 3607 .read = seq_read, 3608 .llseek = seq_lseek, 3609 .release = single_release, 3610 }; 3611 3612 static void handle_crq_init_rsp(struct work_struct *work) 3613 { 3614 struct ibmvnic_adapter *adapter = container_of(work, 3615 struct ibmvnic_adapter, 3616 vnic_crq_init); 3617 struct device *dev = &adapter->vdev->dev; 3618 struct net_device *netdev = adapter->netdev; 3619 unsigned long timeout = msecs_to_jiffies(30000); 3620 bool restart = false; 3621 int rc; 3622 3623 if (adapter->failover) { 3624 release_sub_crqs(adapter); 3625 if (netif_running(netdev)) { 3626 netif_tx_disable(netdev); 3627 ibmvnic_close(netdev); 3628 restart = true; 3629 } 3630 } 3631 3632 send_version_xchg(adapter); 3633 reinit_completion(&adapter->init_done); 3634 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3635 dev_err(dev, "Passive init timeout\n"); 3636 goto task_failed; 3637 } 3638 3639 do { 3640 if (adapter->renegotiate) { 3641 adapter->renegotiate = false; 3642 release_sub_crqs_no_irqs(adapter); 3643 send_cap_queries(adapter); 3644 3645 reinit_completion(&adapter->init_done); 3646 if (!wait_for_completion_timeout(&adapter->init_done, 3647 timeout)) { 3648 dev_err(dev, "Passive init timeout\n"); 3649 goto task_failed; 3650 } 3651 } 3652 } while (adapter->renegotiate); 3653 rc = init_sub_crq_irqs(adapter); 3654 3655 if (rc) 3656 goto task_failed; 3657 3658 netdev->real_num_tx_queues = adapter->req_tx_queues; 3659 netdev->mtu = adapter->req_mtu; 3660 netdev->min_mtu = adapter->min_mtu; 3661 netdev->max_mtu = adapter->max_mtu; 3662 3663 if (adapter->failover) { 3664 adapter->failover = false; 3665 if (restart) { 3666 rc = ibmvnic_open(netdev); 3667 if (rc) 3668 goto restart_failed; 3669 } 3670 netif_carrier_on(netdev); 3671 return; 3672 } 3673 3674 rc = register_netdev(netdev); 3675 if (rc) { 3676 dev_err(dev, 3677 "failed to register netdev rc=%d\n", rc); 3678 goto register_failed; 3679 } 3680 dev_info(dev, "ibmvnic registered\n"); 3681 3682 return; 3683 3684 restart_failed: 3685 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3686 register_failed: 3687 release_sub_crqs(adapter); 3688 task_failed: 3689 dev_err(dev, "Passive initialization was not successful\n"); 3690 } 3691 3692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3693 { 3694 unsigned long timeout = msecs_to_jiffies(30000); 3695 struct ibmvnic_adapter *adapter; 3696 struct net_device *netdev; 3697 unsigned char *mac_addr_p; 3698 struct dentry *ent; 3699 char buf[17]; /* debugfs name buf */ 3700 int rc; 3701 3702 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3703 dev->unit_address); 3704 3705 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3706 VETH_MAC_ADDR, NULL); 3707 if (!mac_addr_p) { 3708 dev_err(&dev->dev, 3709 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3710 __FILE__, __LINE__); 3711 return 0; 3712 } 3713 3714 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3715 IBMVNIC_MAX_TX_QUEUES); 3716 if (!netdev) 3717 return -ENOMEM; 3718 3719 adapter = netdev_priv(netdev); 3720 dev_set_drvdata(&dev->dev, netdev); 3721 adapter->vdev = dev; 3722 adapter->netdev = netdev; 3723 adapter->failover = false; 3724 3725 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3726 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3727 netdev->irq = dev->irq; 3728 netdev->netdev_ops = &ibmvnic_netdev_ops; 3729 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3730 SET_NETDEV_DEV(netdev, &dev->dev); 3731 3732 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3733 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3734 3735 spin_lock_init(&adapter->stats_lock); 3736 3737 rc = ibmvnic_init_crq_queue(adapter); 3738 if (rc) { 3739 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); 3740 goto free_netdev; 3741 } 3742 3743 INIT_LIST_HEAD(&adapter->errors); 3744 INIT_LIST_HEAD(&adapter->inflight); 3745 spin_lock_init(&adapter->error_list_lock); 3746 spin_lock_init(&adapter->inflight_lock); 3747 3748 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, 3749 sizeof(struct ibmvnic_statistics), 3750 DMA_FROM_DEVICE); 3751 if (dma_mapping_error(&dev->dev, adapter->stats_token)) { 3752 if (!firmware_has_feature(FW_FEATURE_CMO)) 3753 dev_err(&dev->dev, "Couldn't map stats buffer\n"); 3754 rc = -ENOMEM; 3755 goto free_crq; 3756 } 3757 3758 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); 3759 ent = debugfs_create_dir(buf, NULL); 3760 if (!ent || IS_ERR(ent)) { 3761 dev_info(&dev->dev, "debugfs create directory failed\n"); 3762 adapter->debugfs_dir = NULL; 3763 } else { 3764 adapter->debugfs_dir = ent; 3765 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, 3766 netdev, &ibmvnic_dump_ops); 3767 if (!ent || IS_ERR(ent)) { 3768 dev_info(&dev->dev, 3769 "debugfs create dump file failed\n"); 3770 adapter->debugfs_dump = NULL; 3771 } else { 3772 adapter->debugfs_dump = ent; 3773 } 3774 } 3775 ibmvnic_send_crq_init(adapter); 3776 3777 init_completion(&adapter->init_done); 3778 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) 3779 return 0; 3780 3781 do { 3782 if (adapter->renegotiate) { 3783 adapter->renegotiate = false; 3784 release_sub_crqs_no_irqs(adapter); 3785 send_cap_queries(adapter); 3786 3787 reinit_completion(&adapter->init_done); 3788 if (!wait_for_completion_timeout(&adapter->init_done, 3789 timeout)) 3790 return 0; 3791 } 3792 } while (adapter->renegotiate); 3793 3794 rc = init_sub_crq_irqs(adapter); 3795 if (rc) { 3796 dev_err(&dev->dev, "failed to initialize sub crq irqs\n"); 3797 goto free_debugfs; 3798 } 3799 3800 netdev->real_num_tx_queues = adapter->req_tx_queues; 3801 netdev->mtu = adapter->req_mtu; 3802 3803 rc = register_netdev(netdev); 3804 if (rc) { 3805 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3806 goto free_sub_crqs; 3807 } 3808 dev_info(&dev->dev, "ibmvnic registered\n"); 3809 3810 return 0; 3811 3812 free_sub_crqs: 3813 release_sub_crqs(adapter); 3814 free_debugfs: 3815 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3816 debugfs_remove_recursive(adapter->debugfs_dir); 3817 free_crq: 3818 ibmvnic_release_crq_queue(adapter); 3819 free_netdev: 3820 free_netdev(netdev); 3821 return rc; 3822 } 3823 3824 static int ibmvnic_remove(struct vio_dev *dev) 3825 { 3826 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3827 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3828 3829 unregister_netdev(netdev); 3830 3831 release_sub_crqs(adapter); 3832 3833 ibmvnic_release_crq_queue(adapter); 3834 3835 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3836 debugfs_remove_recursive(adapter->debugfs_dir); 3837 3838 dma_unmap_single(&dev->dev, adapter->stats_token, 3839 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); 3840 3841 if (adapter->ras_comps) 3842 dma_free_coherent(&dev->dev, 3843 adapter->ras_comp_num * 3844 sizeof(struct ibmvnic_fw_component), 3845 adapter->ras_comps, adapter->ras_comps_tok); 3846 3847 kfree(adapter->ras_comp_int); 3848 3849 free_netdev(netdev); 3850 dev_set_drvdata(&dev->dev, NULL); 3851 3852 return 0; 3853 } 3854 3855 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3856 { 3857 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3858 struct ibmvnic_adapter *adapter; 3859 struct iommu_table *tbl; 3860 unsigned long ret = 0; 3861 int i; 3862 3863 tbl = get_iommu_table_base(&vdev->dev); 3864 3865 /* netdev inits at probe time along with the structures we need below*/ 3866 if (!netdev) 3867 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3868 3869 adapter = netdev_priv(netdev); 3870 3871 ret += PAGE_SIZE; /* the crq message queue */ 3872 ret += adapter->bounce_buffer_size; 3873 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3874 3875 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3876 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3877 3878 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3879 i++) 3880 ret += adapter->rx_pool[i].size * 3881 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3882 3883 return ret; 3884 } 3885 3886 static int ibmvnic_resume(struct device *dev) 3887 { 3888 struct net_device *netdev = dev_get_drvdata(dev); 3889 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3890 int i; 3891 3892 /* kick the interrupt handlers just in case we lost an interrupt */ 3893 for (i = 0; i < adapter->req_rx_queues; i++) 3894 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3895 adapter->rx_scrq[i]); 3896 3897 return 0; 3898 } 3899 3900 static struct vio_device_id ibmvnic_device_table[] = { 3901 {"network", "IBM,vnic"}, 3902 {"", "" } 3903 }; 3904 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3905 3906 static const struct dev_pm_ops ibmvnic_pm_ops = { 3907 .resume = ibmvnic_resume 3908 }; 3909 3910 static struct vio_driver ibmvnic_driver = { 3911 .id_table = ibmvnic_device_table, 3912 .probe = ibmvnic_probe, 3913 .remove = ibmvnic_remove, 3914 .get_desired_dma = ibmvnic_get_desired_dma, 3915 .name = ibmvnic_driver_name, 3916 .pm = &ibmvnic_pm_ops, 3917 }; 3918 3919 /* module functions */ 3920 static int __init ibmvnic_module_init(void) 3921 { 3922 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3923 IBMVNIC_DRIVER_VERSION); 3924 3925 return vio_register_driver(&ibmvnic_driver); 3926 } 3927 3928 static void __exit ibmvnic_module_exit(void) 3929 { 3930 vio_unregister_driver(&ibmvnic_driver); 3931 } 3932 3933 module_init(ibmvnic_module_init); 3934 module_exit(ibmvnic_module_exit); 3935