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