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