1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/in.h> 63 #include <linux/ip.h> 64 #include <linux/ipv6.h> 65 #include <linux/irq.h> 66 #include <linux/kthread.h> 67 #include <linux/seq_file.h> 68 #include <linux/debugfs.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 79 #include "ibmvnic.h" 80 81 static const char ibmvnic_driver_name[] = "ibmvnic"; 82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 83 84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); 85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 86 MODULE_LICENSE("GPL"); 87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 88 89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 90 static int ibmvnic_remove(struct vio_dev *); 91 static void release_sub_crqs(struct ibmvnic_adapter *); 92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *); 93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 98 union sub_crq *sub_crq); 99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 101 static int enable_scrq_irq(struct ibmvnic_adapter *, 102 struct ibmvnic_sub_crq_queue *); 103 static int disable_scrq_irq(struct ibmvnic_adapter *, 104 struct ibmvnic_sub_crq_queue *); 105 static int pending_scrq(struct ibmvnic_adapter *, 106 struct ibmvnic_sub_crq_queue *); 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 108 struct ibmvnic_sub_crq_queue *); 109 static int ibmvnic_poll(struct napi_struct *napi, int data); 110 static void send_map_query(struct ibmvnic_adapter *adapter); 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 112 static void send_request_unmap(struct ibmvnic_adapter *, u8); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 149 unsigned long length, unsigned long *number, 150 unsigned long *irq) 151 { 152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 153 long rc; 154 155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 156 *number = retbuf[0]; 157 *irq = retbuf[1]; 158 159 return rc; 160 } 161 162 /* net_device_ops functions */ 163 164 static void init_rx_pool(struct ibmvnic_adapter *adapter, 165 struct ibmvnic_rx_pool *rx_pool, int num, int index, 166 int buff_size, int active) 167 { 168 netdev_dbg(adapter->netdev, 169 "Initializing rx_pool %d, %d buffs, %d bytes each\n", 170 index, num, buff_size); 171 rx_pool->size = num; 172 rx_pool->index = index; 173 rx_pool->buff_size = buff_size; 174 rx_pool->active = active; 175 } 176 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 178 struct ibmvnic_long_term_buff *ltb, int size) 179 { 180 struct device *dev = &adapter->vdev->dev; 181 182 ltb->size = size; 183 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 184 GFP_KERNEL); 185 186 if (!ltb->buff) { 187 dev_err(dev, "Couldn't alloc long term buffer\n"); 188 return -ENOMEM; 189 } 190 ltb->map_id = adapter->map_id; 191 adapter->map_id++; 192 send_request_map(adapter, ltb->addr, 193 ltb->size, ltb->map_id); 194 init_completion(&adapter->fw_done); 195 wait_for_completion(&adapter->fw_done); 196 return 0; 197 } 198 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 200 struct ibmvnic_long_term_buff *ltb) 201 { 202 struct device *dev = &adapter->vdev->dev; 203 204 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 205 if (!adapter->failover) 206 send_request_unmap(adapter, ltb->map_id); 207 } 208 209 static int alloc_rx_pool(struct ibmvnic_adapter *adapter, 210 struct ibmvnic_rx_pool *pool) 211 { 212 struct device *dev = &adapter->vdev->dev; 213 int i; 214 215 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL); 216 if (!pool->free_map) 217 return -ENOMEM; 218 219 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff), 220 GFP_KERNEL); 221 222 if (!pool->rx_buff) { 223 dev_err(dev, "Couldn't alloc rx buffers\n"); 224 kfree(pool->free_map); 225 return -ENOMEM; 226 } 227 228 if (alloc_long_term_buff(adapter, &pool->long_term_buff, 229 pool->size * pool->buff_size)) { 230 kfree(pool->free_map); 231 kfree(pool->rx_buff); 232 return -ENOMEM; 233 } 234 235 for (i = 0; i < pool->size; ++i) 236 pool->free_map[i] = i; 237 238 atomic_set(&pool->available, 0); 239 pool->next_alloc = 0; 240 pool->next_free = 0; 241 242 return 0; 243 } 244 245 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 246 struct ibmvnic_rx_pool *pool) 247 { 248 int count = pool->size - atomic_read(&pool->available); 249 struct device *dev = &adapter->vdev->dev; 250 int buffers_added = 0; 251 unsigned long lpar_rc; 252 union sub_crq sub_crq; 253 struct sk_buff *skb; 254 unsigned int offset; 255 dma_addr_t dma_addr; 256 unsigned char *dst; 257 u64 *handle_array; 258 int shift = 0; 259 int index; 260 int i; 261 262 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 263 be32_to_cpu(adapter->login_rsp_buf-> 264 off_rxadd_subcrqs)); 265 266 for (i = 0; i < count; ++i) { 267 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 268 if (!skb) { 269 dev_err(dev, "Couldn't replenish rx buff\n"); 270 adapter->replenish_no_mem++; 271 break; 272 } 273 274 index = pool->free_map[pool->next_free]; 275 276 if (pool->rx_buff[index].skb) 277 dev_err(dev, "Inconsistent free_map!\n"); 278 279 /* Copy the skb to the long term mapped DMA buffer */ 280 offset = index * pool->buff_size; 281 dst = pool->long_term_buff.buff + offset; 282 memset(dst, 0, pool->buff_size); 283 dma_addr = pool->long_term_buff.addr + offset; 284 pool->rx_buff[index].data = dst; 285 286 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 287 pool->rx_buff[index].dma = dma_addr; 288 pool->rx_buff[index].skb = skb; 289 pool->rx_buff[index].pool_index = pool->index; 290 pool->rx_buff[index].size = pool->buff_size; 291 292 memset(&sub_crq, 0, sizeof(sub_crq)); 293 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 294 sub_crq.rx_add.correlator = 295 cpu_to_be64((u64)&pool->rx_buff[index]); 296 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 297 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 298 299 /* The length field of the sCRQ is defined to be 24 bits so the 300 * buffer size needs to be left shifted by a byte before it is 301 * converted to big endian to prevent the last byte from being 302 * truncated. 303 */ 304 #ifdef __LITTLE_ENDIAN__ 305 shift = 8; 306 #endif 307 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 308 309 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 310 &sub_crq); 311 if (lpar_rc != H_SUCCESS) 312 goto failure; 313 314 buffers_added++; 315 adapter->replenish_add_buff_success++; 316 pool->next_free = (pool->next_free + 1) % pool->size; 317 } 318 atomic_add(buffers_added, &pool->available); 319 return; 320 321 failure: 322 dev_info(dev, "replenish pools failure\n"); 323 pool->free_map[pool->next_free] = index; 324 pool->rx_buff[index].skb = NULL; 325 if (!dma_mapping_error(dev, dma_addr)) 326 dma_unmap_single(dev, dma_addr, pool->buff_size, 327 DMA_FROM_DEVICE); 328 329 dev_kfree_skb_any(skb); 330 adapter->replenish_add_buff_failure++; 331 atomic_add(buffers_added, &pool->available); 332 } 333 334 static void replenish_pools(struct ibmvnic_adapter *adapter) 335 { 336 int i; 337 338 if (adapter->migrated) 339 return; 340 341 adapter->replenish_task_cycles++; 342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 343 i++) { 344 if (adapter->rx_pool[i].active) 345 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 346 } 347 } 348 349 static void free_rx_pool(struct ibmvnic_adapter *adapter, 350 struct ibmvnic_rx_pool *pool) 351 { 352 int i; 353 354 kfree(pool->free_map); 355 pool->free_map = NULL; 356 357 if (!pool->rx_buff) 358 return; 359 360 for (i = 0; i < pool->size; i++) { 361 if (pool->rx_buff[i].skb) { 362 dev_kfree_skb_any(pool->rx_buff[i].skb); 363 pool->rx_buff[i].skb = NULL; 364 } 365 } 366 kfree(pool->rx_buff); 367 pool->rx_buff = NULL; 368 } 369 370 static int ibmvnic_open(struct net_device *netdev) 371 { 372 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 373 struct device *dev = &adapter->vdev->dev; 374 struct ibmvnic_tx_pool *tx_pool; 375 union ibmvnic_crq crq; 376 int rxadd_subcrqs; 377 u64 *size_array; 378 int tx_subcrqs; 379 int i, j; 380 381 rxadd_subcrqs = 382 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 383 tx_subcrqs = 384 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 385 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 386 be32_to_cpu(adapter->login_rsp_buf-> 387 off_rxadd_buff_size)); 388 adapter->map_id = 1; 389 adapter->napi = kcalloc(adapter->req_rx_queues, 390 sizeof(struct napi_struct), GFP_KERNEL); 391 if (!adapter->napi) 392 goto alloc_napi_failed; 393 for (i = 0; i < adapter->req_rx_queues; i++) { 394 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 395 NAPI_POLL_WEIGHT); 396 napi_enable(&adapter->napi[i]); 397 } 398 adapter->rx_pool = 399 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); 400 401 if (!adapter->rx_pool) 402 goto rx_pool_arr_alloc_failed; 403 send_map_query(adapter); 404 for (i = 0; i < rxadd_subcrqs; i++) { 405 init_rx_pool(adapter, &adapter->rx_pool[i], 406 IBMVNIC_BUFFS_PER_POOL, i, 407 be64_to_cpu(size_array[i]), 1); 408 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) { 409 dev_err(dev, "Couldn't alloc rx pool\n"); 410 goto rx_pool_alloc_failed; 411 } 412 } 413 adapter->tx_pool = 414 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 415 416 if (!adapter->tx_pool) 417 goto tx_pool_arr_alloc_failed; 418 for (i = 0; i < tx_subcrqs; i++) { 419 tx_pool = &adapter->tx_pool[i]; 420 tx_pool->tx_buff = 421 kcalloc(adapter->max_tx_entries_per_subcrq, 422 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); 423 if (!tx_pool->tx_buff) 424 goto tx_pool_alloc_failed; 425 426 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 427 adapter->max_tx_entries_per_subcrq * 428 adapter->req_mtu)) 429 goto tx_ltb_alloc_failed; 430 431 tx_pool->free_map = 432 kcalloc(adapter->max_tx_entries_per_subcrq, 433 sizeof(int), GFP_KERNEL); 434 if (!tx_pool->free_map) 435 goto tx_fm_alloc_failed; 436 437 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++) 438 tx_pool->free_map[j] = j; 439 440 tx_pool->consumer_index = 0; 441 tx_pool->producer_index = 0; 442 } 443 adapter->bounce_buffer_size = 444 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; 445 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size, 446 GFP_KERNEL); 447 if (!adapter->bounce_buffer) 448 goto bounce_alloc_failed; 449 450 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer, 451 adapter->bounce_buffer_size, 452 DMA_TO_DEVICE); 453 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 454 dev_err(dev, "Couldn't map tx bounce buffer\n"); 455 goto bounce_map_failed; 456 } 457 replenish_pools(adapter); 458 459 /* We're ready to receive frames, enable the sub-crq interrupts and 460 * set the logical link state to up 461 */ 462 for (i = 0; i < adapter->req_rx_queues; i++) 463 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 464 465 for (i = 0; i < adapter->req_tx_queues; i++) 466 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 467 468 memset(&crq, 0, sizeof(crq)); 469 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 470 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 471 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; 472 ibmvnic_send_crq(adapter, &crq); 473 474 netif_tx_start_all_queues(netdev); 475 476 return 0; 477 478 bounce_map_failed: 479 kfree(adapter->bounce_buffer); 480 bounce_alloc_failed: 481 i = tx_subcrqs - 1; 482 kfree(adapter->tx_pool[i].free_map); 483 tx_fm_alloc_failed: 484 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff); 485 tx_ltb_alloc_failed: 486 kfree(adapter->tx_pool[i].tx_buff); 487 tx_pool_alloc_failed: 488 for (j = 0; j < i; j++) { 489 kfree(adapter->tx_pool[j].tx_buff); 490 free_long_term_buff(adapter, 491 &adapter->tx_pool[j].long_term_buff); 492 kfree(adapter->tx_pool[j].free_map); 493 } 494 kfree(adapter->tx_pool); 495 adapter->tx_pool = NULL; 496 tx_pool_arr_alloc_failed: 497 i = rxadd_subcrqs; 498 rx_pool_alloc_failed: 499 for (j = 0; j < i; j++) { 500 free_rx_pool(adapter, &adapter->rx_pool[j]); 501 free_long_term_buff(adapter, 502 &adapter->rx_pool[j].long_term_buff); 503 } 504 kfree(adapter->rx_pool); 505 adapter->rx_pool = NULL; 506 rx_pool_arr_alloc_failed: 507 for (i = 0; i < adapter->req_rx_queues; i++) 508 napi_enable(&adapter->napi[i]); 509 alloc_napi_failed: 510 return -ENOMEM; 511 } 512 513 static int ibmvnic_close(struct net_device *netdev) 514 { 515 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 516 struct device *dev = &adapter->vdev->dev; 517 union ibmvnic_crq crq; 518 int i; 519 520 adapter->closing = true; 521 522 for (i = 0; i < adapter->req_rx_queues; i++) 523 napi_disable(&adapter->napi[i]); 524 525 if (!adapter->failover) 526 netif_tx_stop_all_queues(netdev); 527 528 if (adapter->bounce_buffer) { 529 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 530 dma_unmap_single(&adapter->vdev->dev, 531 adapter->bounce_buffer_dma, 532 adapter->bounce_buffer_size, 533 DMA_BIDIRECTIONAL); 534 adapter->bounce_buffer_dma = DMA_ERROR_CODE; 535 } 536 kfree(adapter->bounce_buffer); 537 adapter->bounce_buffer = NULL; 538 } 539 540 memset(&crq, 0, sizeof(crq)); 541 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 542 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 543 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; 544 ibmvnic_send_crq(adapter, &crq); 545 546 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 547 i++) { 548 kfree(adapter->tx_pool[i].tx_buff); 549 free_long_term_buff(adapter, 550 &adapter->tx_pool[i].long_term_buff); 551 kfree(adapter->tx_pool[i].free_map); 552 } 553 kfree(adapter->tx_pool); 554 adapter->tx_pool = NULL; 555 556 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 557 i++) { 558 free_rx_pool(adapter, &adapter->rx_pool[i]); 559 free_long_term_buff(adapter, 560 &adapter->rx_pool[i].long_term_buff); 561 } 562 kfree(adapter->rx_pool); 563 adapter->rx_pool = NULL; 564 565 adapter->closing = false; 566 567 return 0; 568 } 569 570 /** 571 * build_hdr_data - creates L2/L3/L4 header data buffer 572 * @hdr_field - bitfield determining needed headers 573 * @skb - socket buffer 574 * @hdr_len - array of header lengths 575 * @tot_len - total length of data 576 * 577 * Reads hdr_field to determine which headers are needed by firmware. 578 * Builds a buffer containing these headers. Saves individual header 579 * lengths and total buffer length to be used to build descriptors. 580 */ 581 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 582 int *hdr_len, u8 *hdr_data) 583 { 584 int len = 0; 585 u8 *hdr; 586 587 hdr_len[0] = sizeof(struct ethhdr); 588 589 if (skb->protocol == htons(ETH_P_IP)) { 590 hdr_len[1] = ip_hdr(skb)->ihl * 4; 591 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 592 hdr_len[2] = tcp_hdrlen(skb); 593 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 594 hdr_len[2] = sizeof(struct udphdr); 595 } else if (skb->protocol == htons(ETH_P_IPV6)) { 596 hdr_len[1] = sizeof(struct ipv6hdr); 597 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 598 hdr_len[2] = tcp_hdrlen(skb); 599 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 600 hdr_len[2] = sizeof(struct udphdr); 601 } 602 603 memset(hdr_data, 0, 120); 604 if ((hdr_field >> 6) & 1) { 605 hdr = skb_mac_header(skb); 606 memcpy(hdr_data, hdr, hdr_len[0]); 607 len += hdr_len[0]; 608 } 609 610 if ((hdr_field >> 5) & 1) { 611 hdr = skb_network_header(skb); 612 memcpy(hdr_data + len, hdr, hdr_len[1]); 613 len += hdr_len[1]; 614 } 615 616 if ((hdr_field >> 4) & 1) { 617 hdr = skb_transport_header(skb); 618 memcpy(hdr_data + len, hdr, hdr_len[2]); 619 len += hdr_len[2]; 620 } 621 return len; 622 } 623 624 /** 625 * create_hdr_descs - create header and header extension descriptors 626 * @hdr_field - bitfield determining needed headers 627 * @data - buffer containing header data 628 * @len - length of data buffer 629 * @hdr_len - array of individual header lengths 630 * @scrq_arr - descriptor array 631 * 632 * Creates header and, if needed, header extension descriptors and 633 * places them in a descriptor array, scrq_arr 634 */ 635 636 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 637 union sub_crq *scrq_arr) 638 { 639 union sub_crq hdr_desc; 640 int tmp_len = len; 641 u8 *data, *cur; 642 int tmp; 643 644 while (tmp_len > 0) { 645 cur = hdr_data + len - tmp_len; 646 647 memset(&hdr_desc, 0, sizeof(hdr_desc)); 648 if (cur != hdr_data) { 649 data = hdr_desc.hdr_ext.data; 650 tmp = tmp_len > 29 ? 29 : tmp_len; 651 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 652 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 653 hdr_desc.hdr_ext.len = tmp; 654 } else { 655 data = hdr_desc.hdr.data; 656 tmp = tmp_len > 24 ? 24 : tmp_len; 657 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 658 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 659 hdr_desc.hdr.len = tmp; 660 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 661 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 662 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 663 hdr_desc.hdr.flag = hdr_field << 1; 664 } 665 memcpy(data, cur, tmp); 666 tmp_len -= tmp; 667 *scrq_arr = hdr_desc; 668 scrq_arr++; 669 } 670 } 671 672 /** 673 * build_hdr_descs_arr - build a header descriptor array 674 * @skb - socket buffer 675 * @num_entries - number of descriptors to be sent 676 * @subcrq - first TX descriptor 677 * @hdr_field - bit field determining which headers will be sent 678 * 679 * This function will build a TX descriptor array with applicable 680 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 681 */ 682 683 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 684 int *num_entries, u8 hdr_field) 685 { 686 int hdr_len[3] = {0, 0, 0}; 687 int tot_len, len; 688 u8 *hdr_data = txbuff->hdr_data; 689 690 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 691 txbuff->hdr_data); 692 len = tot_len; 693 len -= 24; 694 if (len > 0) 695 num_entries += len % 29 ? len / 29 + 1 : len / 29; 696 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 697 txbuff->indir_arr + 1); 698 } 699 700 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 701 { 702 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 703 int queue_num = skb_get_queue_mapping(skb); 704 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 705 struct device *dev = &adapter->vdev->dev; 706 struct ibmvnic_tx_buff *tx_buff = NULL; 707 struct ibmvnic_tx_pool *tx_pool; 708 unsigned int tx_send_failed = 0; 709 unsigned int tx_map_failed = 0; 710 unsigned int tx_dropped = 0; 711 unsigned int tx_packets = 0; 712 unsigned int tx_bytes = 0; 713 dma_addr_t data_dma_addr; 714 struct netdev_queue *txq; 715 bool used_bounce = false; 716 unsigned long lpar_rc; 717 union sub_crq tx_crq; 718 unsigned int offset; 719 int num_entries = 1; 720 unsigned char *dst; 721 u64 *handle_array; 722 int index = 0; 723 int ret = 0; 724 725 tx_pool = &adapter->tx_pool[queue_num]; 726 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 727 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 728 be32_to_cpu(adapter->login_rsp_buf-> 729 off_txsubm_subcrqs)); 730 if (adapter->migrated) { 731 tx_send_failed++; 732 tx_dropped++; 733 ret = NETDEV_TX_BUSY; 734 goto out; 735 } 736 737 index = tx_pool->free_map[tx_pool->consumer_index]; 738 offset = index * adapter->req_mtu; 739 dst = tx_pool->long_term_buff.buff + offset; 740 memset(dst, 0, adapter->req_mtu); 741 skb_copy_from_linear_data(skb, dst, skb->len); 742 data_dma_addr = tx_pool->long_term_buff.addr + offset; 743 744 tx_pool->consumer_index = 745 (tx_pool->consumer_index + 1) % 746 adapter->max_tx_entries_per_subcrq; 747 748 tx_buff = &tx_pool->tx_buff[index]; 749 tx_buff->skb = skb; 750 tx_buff->data_dma[0] = data_dma_addr; 751 tx_buff->data_len[0] = skb->len; 752 tx_buff->index = index; 753 tx_buff->pool_index = queue_num; 754 tx_buff->last_frag = true; 755 tx_buff->used_bounce = used_bounce; 756 757 memset(&tx_crq, 0, sizeof(tx_crq)); 758 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 759 tx_crq.v1.type = IBMVNIC_TX_DESC; 760 tx_crq.v1.n_crq_elem = 1; 761 tx_crq.v1.n_sge = 1; 762 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 763 tx_crq.v1.correlator = cpu_to_be32(index); 764 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 765 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 766 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 767 768 if (adapter->vlan_header_insertion) { 769 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 770 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 771 } 772 773 if (skb->protocol == htons(ETH_P_IP)) { 774 if (ip_hdr(skb)->version == 4) 775 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 776 else if (ip_hdr(skb)->version == 6) 777 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 778 779 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 780 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 781 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 782 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 783 } 784 785 if (skb->ip_summed == CHECKSUM_PARTIAL) { 786 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 787 hdrs += 2; 788 } 789 /* determine if l2/3/4 headers are sent to firmware */ 790 if ((*hdrs >> 7) & 1 && 791 (skb->protocol == htons(ETH_P_IP) || 792 skb->protocol == htons(ETH_P_IPV6))) { 793 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 794 tx_crq.v1.n_crq_elem = num_entries; 795 tx_buff->indir_arr[0] = tx_crq; 796 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 797 sizeof(tx_buff->indir_arr), 798 DMA_TO_DEVICE); 799 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 800 if (!firmware_has_feature(FW_FEATURE_CMO)) 801 dev_err(dev, "tx: unable to map descriptor array\n"); 802 tx_map_failed++; 803 tx_dropped++; 804 ret = NETDEV_TX_BUSY; 805 goto out; 806 } 807 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 808 (u64)tx_buff->indir_dma, 809 (u64)num_entries); 810 } else { 811 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 812 &tx_crq); 813 } 814 if (lpar_rc != H_SUCCESS) { 815 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 816 817 if (tx_pool->consumer_index == 0) 818 tx_pool->consumer_index = 819 adapter->max_tx_entries_per_subcrq - 1; 820 else 821 tx_pool->consumer_index--; 822 823 tx_send_failed++; 824 tx_dropped++; 825 ret = NETDEV_TX_BUSY; 826 goto out; 827 } 828 tx_packets++; 829 tx_bytes += skb->len; 830 txq->trans_start = jiffies; 831 ret = NETDEV_TX_OK; 832 833 out: 834 netdev->stats.tx_dropped += tx_dropped; 835 netdev->stats.tx_bytes += tx_bytes; 836 netdev->stats.tx_packets += tx_packets; 837 adapter->tx_send_failed += tx_send_failed; 838 adapter->tx_map_failed += tx_map_failed; 839 840 return ret; 841 } 842 843 static void ibmvnic_set_multi(struct net_device *netdev) 844 { 845 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 846 struct netdev_hw_addr *ha; 847 union ibmvnic_crq crq; 848 849 memset(&crq, 0, sizeof(crq)); 850 crq.request_capability.first = IBMVNIC_CRQ_CMD; 851 crq.request_capability.cmd = REQUEST_CAPABILITY; 852 853 if (netdev->flags & IFF_PROMISC) { 854 if (!adapter->promisc_supported) 855 return; 856 } else { 857 if (netdev->flags & IFF_ALLMULTI) { 858 /* Accept all multicast */ 859 memset(&crq, 0, sizeof(crq)); 860 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 861 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 862 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 863 ibmvnic_send_crq(adapter, &crq); 864 } else if (netdev_mc_empty(netdev)) { 865 /* Reject all multicast */ 866 memset(&crq, 0, sizeof(crq)); 867 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 868 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 869 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 870 ibmvnic_send_crq(adapter, &crq); 871 } else { 872 /* Accept one or more multicast(s) */ 873 netdev_for_each_mc_addr(ha, netdev) { 874 memset(&crq, 0, sizeof(crq)); 875 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 876 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 877 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 878 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 879 ha->addr); 880 ibmvnic_send_crq(adapter, &crq); 881 } 882 } 883 } 884 } 885 886 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 887 { 888 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 889 struct sockaddr *addr = p; 890 union ibmvnic_crq crq; 891 892 if (!is_valid_ether_addr(addr->sa_data)) 893 return -EADDRNOTAVAIL; 894 895 memset(&crq, 0, sizeof(crq)); 896 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 897 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 898 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 899 ibmvnic_send_crq(adapter, &crq); 900 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 901 return 0; 902 } 903 904 static void ibmvnic_tx_timeout(struct net_device *dev) 905 { 906 struct ibmvnic_adapter *adapter = netdev_priv(dev); 907 int rc; 908 909 /* Adapter timed out, resetting it */ 910 release_sub_crqs(adapter); 911 rc = ibmvnic_reset_crq(adapter); 912 if (rc) 913 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 914 else 915 ibmvnic_send_crq_init(adapter); 916 } 917 918 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 919 struct ibmvnic_rx_buff *rx_buff) 920 { 921 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 922 923 rx_buff->skb = NULL; 924 925 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 926 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 927 928 atomic_dec(&pool->available); 929 } 930 931 static int ibmvnic_poll(struct napi_struct *napi, int budget) 932 { 933 struct net_device *netdev = napi->dev; 934 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 935 int scrq_num = (int)(napi - adapter->napi); 936 int frames_processed = 0; 937 restart_poll: 938 while (frames_processed < budget) { 939 struct sk_buff *skb; 940 struct ibmvnic_rx_buff *rx_buff; 941 union sub_crq *next; 942 u32 length; 943 u16 offset; 944 u8 flags = 0; 945 946 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 947 break; 948 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 949 rx_buff = 950 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 951 rx_comp.correlator); 952 /* do error checking */ 953 if (next->rx_comp.rc) { 954 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 955 /* free the entry */ 956 next->rx_comp.first = 0; 957 remove_buff_from_pool(adapter, rx_buff); 958 break; 959 } 960 961 length = be32_to_cpu(next->rx_comp.len); 962 offset = be16_to_cpu(next->rx_comp.off_frame_data); 963 flags = next->rx_comp.flags; 964 skb = rx_buff->skb; 965 skb_copy_to_linear_data(skb, rx_buff->data + offset, 966 length); 967 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); 968 /* free the entry */ 969 next->rx_comp.first = 0; 970 remove_buff_from_pool(adapter, rx_buff); 971 972 skb_put(skb, length); 973 skb->protocol = eth_type_trans(skb, netdev); 974 975 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 976 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 977 skb->ip_summed = CHECKSUM_UNNECESSARY; 978 } 979 980 length = skb->len; 981 napi_gro_receive(napi, skb); /* send it up */ 982 netdev->stats.rx_packets++; 983 netdev->stats.rx_bytes += length; 984 frames_processed++; 985 } 986 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 987 988 if (frames_processed < budget) { 989 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 990 napi_complete_done(napi, frames_processed); 991 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 992 napi_reschedule(napi)) { 993 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 994 goto restart_poll; 995 } 996 } 997 return frames_processed; 998 } 999 1000 #ifdef CONFIG_NET_POLL_CONTROLLER 1001 static void ibmvnic_netpoll_controller(struct net_device *dev) 1002 { 1003 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1004 int i; 1005 1006 replenish_pools(netdev_priv(dev)); 1007 for (i = 0; i < adapter->req_rx_queues; i++) 1008 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1009 adapter->rx_scrq[i]); 1010 } 1011 #endif 1012 1013 static const struct net_device_ops ibmvnic_netdev_ops = { 1014 .ndo_open = ibmvnic_open, 1015 .ndo_stop = ibmvnic_close, 1016 .ndo_start_xmit = ibmvnic_xmit, 1017 .ndo_set_rx_mode = ibmvnic_set_multi, 1018 .ndo_set_mac_address = ibmvnic_set_mac, 1019 .ndo_validate_addr = eth_validate_addr, 1020 .ndo_tx_timeout = ibmvnic_tx_timeout, 1021 #ifdef CONFIG_NET_POLL_CONTROLLER 1022 .ndo_poll_controller = ibmvnic_netpoll_controller, 1023 #endif 1024 }; 1025 1026 /* ethtool functions */ 1027 1028 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1029 struct ethtool_link_ksettings *cmd) 1030 { 1031 u32 supported, advertising; 1032 1033 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1034 SUPPORTED_FIBRE); 1035 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1036 ADVERTISED_FIBRE); 1037 cmd->base.speed = SPEED_1000; 1038 cmd->base.duplex = DUPLEX_FULL; 1039 cmd->base.port = PORT_FIBRE; 1040 cmd->base.phy_address = 0; 1041 cmd->base.autoneg = AUTONEG_ENABLE; 1042 1043 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1044 supported); 1045 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1046 advertising); 1047 1048 return 0; 1049 } 1050 1051 static void ibmvnic_get_drvinfo(struct net_device *dev, 1052 struct ethtool_drvinfo *info) 1053 { 1054 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1055 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1056 } 1057 1058 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1059 { 1060 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1061 1062 return adapter->msg_enable; 1063 } 1064 1065 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1066 { 1067 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1068 1069 adapter->msg_enable = data; 1070 } 1071 1072 static u32 ibmvnic_get_link(struct net_device *netdev) 1073 { 1074 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1075 1076 /* Don't need to send a query because we request a logical link up at 1077 * init and then we wait for link state indications 1078 */ 1079 return adapter->logical_link_state; 1080 } 1081 1082 static void ibmvnic_get_ringparam(struct net_device *netdev, 1083 struct ethtool_ringparam *ring) 1084 { 1085 ring->rx_max_pending = 0; 1086 ring->tx_max_pending = 0; 1087 ring->rx_mini_max_pending = 0; 1088 ring->rx_jumbo_max_pending = 0; 1089 ring->rx_pending = 0; 1090 ring->tx_pending = 0; 1091 ring->rx_mini_pending = 0; 1092 ring->rx_jumbo_pending = 0; 1093 } 1094 1095 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1096 { 1097 int i; 1098 1099 if (stringset != ETH_SS_STATS) 1100 return; 1101 1102 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1103 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1104 } 1105 1106 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1107 { 1108 switch (sset) { 1109 case ETH_SS_STATS: 1110 return ARRAY_SIZE(ibmvnic_stats); 1111 default: 1112 return -EOPNOTSUPP; 1113 } 1114 } 1115 1116 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1117 struct ethtool_stats *stats, u64 *data) 1118 { 1119 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1120 union ibmvnic_crq crq; 1121 int i; 1122 1123 memset(&crq, 0, sizeof(crq)); 1124 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1125 crq.request_statistics.cmd = REQUEST_STATISTICS; 1126 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1127 crq.request_statistics.len = 1128 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1129 ibmvnic_send_crq(adapter, &crq); 1130 1131 /* Wait for data to be written */ 1132 init_completion(&adapter->stats_done); 1133 wait_for_completion(&adapter->stats_done); 1134 1135 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1136 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1137 } 1138 1139 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1140 .get_drvinfo = ibmvnic_get_drvinfo, 1141 .get_msglevel = ibmvnic_get_msglevel, 1142 .set_msglevel = ibmvnic_set_msglevel, 1143 .get_link = ibmvnic_get_link, 1144 .get_ringparam = ibmvnic_get_ringparam, 1145 .get_strings = ibmvnic_get_strings, 1146 .get_sset_count = ibmvnic_get_sset_count, 1147 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1148 .get_link_ksettings = ibmvnic_get_link_ksettings, 1149 }; 1150 1151 /* Routines for managing CRQs/sCRQs */ 1152 1153 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1154 struct ibmvnic_sub_crq_queue *scrq) 1155 { 1156 struct device *dev = &adapter->vdev->dev; 1157 long rc; 1158 1159 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1160 1161 /* Close the sub-crqs */ 1162 do { 1163 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1164 adapter->vdev->unit_address, 1165 scrq->crq_num); 1166 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1167 1168 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1169 DMA_BIDIRECTIONAL); 1170 free_pages((unsigned long)scrq->msgs, 2); 1171 kfree(scrq); 1172 } 1173 1174 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1175 *adapter) 1176 { 1177 struct device *dev = &adapter->vdev->dev; 1178 struct ibmvnic_sub_crq_queue *scrq; 1179 int rc; 1180 1181 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); 1182 if (!scrq) 1183 return NULL; 1184 1185 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); 1186 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1187 if (!scrq->msgs) { 1188 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1189 goto zero_page_failed; 1190 } 1191 1192 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1193 DMA_BIDIRECTIONAL); 1194 if (dma_mapping_error(dev, scrq->msg_token)) { 1195 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1196 goto map_failed; 1197 } 1198 1199 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1200 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1201 1202 if (rc == H_RESOURCE) 1203 rc = ibmvnic_reset_crq(adapter); 1204 1205 if (rc == H_CLOSED) { 1206 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1207 } else if (rc) { 1208 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1209 goto reg_failed; 1210 } 1211 1212 scrq->adapter = adapter; 1213 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1214 scrq->cur = 0; 1215 scrq->rx_skb_top = NULL; 1216 spin_lock_init(&scrq->lock); 1217 1218 netdev_dbg(adapter->netdev, 1219 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1220 scrq->crq_num, scrq->hw_irq, scrq->irq); 1221 1222 return scrq; 1223 1224 reg_failed: 1225 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1226 DMA_BIDIRECTIONAL); 1227 map_failed: 1228 free_pages((unsigned long)scrq->msgs, 2); 1229 zero_page_failed: 1230 kfree(scrq); 1231 1232 return NULL; 1233 } 1234 1235 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1236 { 1237 int i; 1238 1239 if (adapter->tx_scrq) { 1240 for (i = 0; i < adapter->req_tx_queues; i++) 1241 if (adapter->tx_scrq[i]) { 1242 free_irq(adapter->tx_scrq[i]->irq, 1243 adapter->tx_scrq[i]); 1244 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1245 release_sub_crq_queue(adapter, 1246 adapter->tx_scrq[i]); 1247 } 1248 adapter->tx_scrq = NULL; 1249 } 1250 1251 if (adapter->rx_scrq) { 1252 for (i = 0; i < adapter->req_rx_queues; i++) 1253 if (adapter->rx_scrq[i]) { 1254 free_irq(adapter->rx_scrq[i]->irq, 1255 adapter->rx_scrq[i]); 1256 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1257 release_sub_crq_queue(adapter, 1258 adapter->rx_scrq[i]); 1259 } 1260 adapter->rx_scrq = NULL; 1261 } 1262 1263 adapter->requested_caps = 0; 1264 } 1265 1266 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter) 1267 { 1268 int i; 1269 1270 if (adapter->tx_scrq) { 1271 for (i = 0; i < adapter->req_tx_queues; i++) 1272 if (adapter->tx_scrq[i]) 1273 release_sub_crq_queue(adapter, 1274 adapter->tx_scrq[i]); 1275 adapter->tx_scrq = NULL; 1276 } 1277 1278 if (adapter->rx_scrq) { 1279 for (i = 0; i < adapter->req_rx_queues; i++) 1280 if (adapter->rx_scrq[i]) 1281 release_sub_crq_queue(adapter, 1282 adapter->rx_scrq[i]); 1283 adapter->rx_scrq = NULL; 1284 } 1285 1286 adapter->requested_caps = 0; 1287 } 1288 1289 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1290 struct ibmvnic_sub_crq_queue *scrq) 1291 { 1292 struct device *dev = &adapter->vdev->dev; 1293 unsigned long rc; 1294 1295 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1296 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1297 if (rc) 1298 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1299 scrq->hw_irq, rc); 1300 return rc; 1301 } 1302 1303 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1304 struct ibmvnic_sub_crq_queue *scrq) 1305 { 1306 struct device *dev = &adapter->vdev->dev; 1307 unsigned long rc; 1308 1309 if (scrq->hw_irq > 0x100000000ULL) { 1310 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1311 return 1; 1312 } 1313 1314 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1315 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1316 if (rc) 1317 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1318 scrq->hw_irq, rc); 1319 return rc; 1320 } 1321 1322 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1323 struct ibmvnic_sub_crq_queue *scrq) 1324 { 1325 struct device *dev = &adapter->vdev->dev; 1326 struct ibmvnic_tx_buff *txbuff; 1327 union sub_crq *next; 1328 int index; 1329 int i, j; 1330 u8 first; 1331 1332 restart_loop: 1333 while (pending_scrq(adapter, scrq)) { 1334 unsigned int pool = scrq->pool_index; 1335 1336 next = ibmvnic_next_scrq(adapter, scrq); 1337 for (i = 0; i < next->tx_comp.num_comps; i++) { 1338 if (next->tx_comp.rcs[i]) { 1339 dev_err(dev, "tx error %x\n", 1340 next->tx_comp.rcs[i]); 1341 continue; 1342 } 1343 index = be32_to_cpu(next->tx_comp.correlators[i]); 1344 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1345 1346 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1347 if (!txbuff->data_dma[j]) 1348 continue; 1349 1350 txbuff->data_dma[j] = 0; 1351 txbuff->used_bounce = false; 1352 } 1353 /* if sub_crq was sent indirectly */ 1354 first = txbuff->indir_arr[0].generic.first; 1355 if (first == IBMVNIC_CRQ_CMD) { 1356 dma_unmap_single(dev, txbuff->indir_dma, 1357 sizeof(txbuff->indir_arr), 1358 DMA_TO_DEVICE); 1359 } 1360 1361 if (txbuff->last_frag) 1362 dev_kfree_skb_any(txbuff->skb); 1363 1364 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1365 producer_index] = index; 1366 adapter->tx_pool[pool].producer_index = 1367 (adapter->tx_pool[pool].producer_index + 1) % 1368 adapter->max_tx_entries_per_subcrq; 1369 } 1370 /* remove tx_comp scrq*/ 1371 next->tx_comp.first = 0; 1372 } 1373 1374 enable_scrq_irq(adapter, scrq); 1375 1376 if (pending_scrq(adapter, scrq)) { 1377 disable_scrq_irq(adapter, scrq); 1378 goto restart_loop; 1379 } 1380 1381 return 0; 1382 } 1383 1384 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1385 { 1386 struct ibmvnic_sub_crq_queue *scrq = instance; 1387 struct ibmvnic_adapter *adapter = scrq->adapter; 1388 1389 disable_scrq_irq(adapter, scrq); 1390 ibmvnic_complete_tx(adapter, scrq); 1391 1392 return IRQ_HANDLED; 1393 } 1394 1395 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1396 { 1397 struct ibmvnic_sub_crq_queue *scrq = instance; 1398 struct ibmvnic_adapter *adapter = scrq->adapter; 1399 1400 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1401 disable_scrq_irq(adapter, scrq); 1402 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1403 } 1404 1405 return IRQ_HANDLED; 1406 } 1407 1408 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1409 { 1410 struct device *dev = &adapter->vdev->dev; 1411 struct ibmvnic_sub_crq_queue *scrq; 1412 int i = 0, j = 0; 1413 int rc = 0; 1414 1415 for (i = 0; i < adapter->req_tx_queues; i++) { 1416 scrq = adapter->tx_scrq[i]; 1417 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1418 1419 if (!scrq->irq) { 1420 rc = -EINVAL; 1421 dev_err(dev, "Error mapping irq\n"); 1422 goto req_tx_irq_failed; 1423 } 1424 1425 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1426 0, "ibmvnic_tx", scrq); 1427 1428 if (rc) { 1429 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1430 scrq->irq, rc); 1431 irq_dispose_mapping(scrq->irq); 1432 goto req_rx_irq_failed; 1433 } 1434 } 1435 1436 for (i = 0; i < adapter->req_rx_queues; i++) { 1437 scrq = adapter->rx_scrq[i]; 1438 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1439 if (!scrq->irq) { 1440 rc = -EINVAL; 1441 dev_err(dev, "Error mapping irq\n"); 1442 goto req_rx_irq_failed; 1443 } 1444 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1445 0, "ibmvnic_rx", scrq); 1446 if (rc) { 1447 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1448 scrq->irq, rc); 1449 irq_dispose_mapping(scrq->irq); 1450 goto req_rx_irq_failed; 1451 } 1452 } 1453 return rc; 1454 1455 req_rx_irq_failed: 1456 for (j = 0; j < i; j++) { 1457 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1458 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1459 } 1460 i = adapter->req_tx_queues; 1461 req_tx_irq_failed: 1462 for (j = 0; j < i; j++) { 1463 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1464 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1465 } 1466 release_sub_crqs_no_irqs(adapter); 1467 return rc; 1468 } 1469 1470 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) 1471 { 1472 struct device *dev = &adapter->vdev->dev; 1473 struct ibmvnic_sub_crq_queue **allqueues; 1474 int registered_queues = 0; 1475 union ibmvnic_crq crq; 1476 int total_queues; 1477 int more = 0; 1478 int i; 1479 1480 if (!retry) { 1481 /* Sub-CRQ entries are 32 byte long */ 1482 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1483 1484 if (adapter->min_tx_entries_per_subcrq > entries_page || 1485 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1486 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1487 goto allqueues_failed; 1488 } 1489 1490 /* Get the minimum between the queried max and the entries 1491 * that fit in our PAGE_SIZE 1492 */ 1493 adapter->req_tx_entries_per_subcrq = 1494 adapter->max_tx_entries_per_subcrq > entries_page ? 1495 entries_page : adapter->max_tx_entries_per_subcrq; 1496 adapter->req_rx_add_entries_per_subcrq = 1497 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1498 entries_page : adapter->max_rx_add_entries_per_subcrq; 1499 1500 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1501 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1502 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1503 1504 adapter->req_mtu = adapter->max_mtu; 1505 } 1506 1507 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1508 1509 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); 1510 if (!allqueues) 1511 goto allqueues_failed; 1512 1513 for (i = 0; i < total_queues; i++) { 1514 allqueues[i] = init_sub_crq_queue(adapter); 1515 if (!allqueues[i]) { 1516 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1517 break; 1518 } 1519 registered_queues++; 1520 } 1521 1522 /* Make sure we were able to register the minimum number of queues */ 1523 if (registered_queues < 1524 adapter->min_tx_queues + adapter->min_rx_queues) { 1525 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1526 goto tx_failed; 1527 } 1528 1529 /* Distribute the failed allocated queues*/ 1530 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1531 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1532 switch (i % 3) { 1533 case 0: 1534 if (adapter->req_rx_queues > adapter->min_rx_queues) 1535 adapter->req_rx_queues--; 1536 else 1537 more++; 1538 break; 1539 case 1: 1540 if (adapter->req_tx_queues > adapter->min_tx_queues) 1541 adapter->req_tx_queues--; 1542 else 1543 more++; 1544 break; 1545 } 1546 } 1547 1548 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1549 sizeof(*adapter->tx_scrq), GFP_ATOMIC); 1550 if (!adapter->tx_scrq) 1551 goto tx_failed; 1552 1553 for (i = 0; i < adapter->req_tx_queues; i++) { 1554 adapter->tx_scrq[i] = allqueues[i]; 1555 adapter->tx_scrq[i]->pool_index = i; 1556 } 1557 1558 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1559 sizeof(*adapter->rx_scrq), GFP_ATOMIC); 1560 if (!adapter->rx_scrq) 1561 goto rx_failed; 1562 1563 for (i = 0; i < adapter->req_rx_queues; i++) { 1564 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1565 adapter->rx_scrq[i]->scrq_num = i; 1566 } 1567 1568 memset(&crq, 0, sizeof(crq)); 1569 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1570 crq.request_capability.cmd = REQUEST_CAPABILITY; 1571 1572 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1573 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1574 ibmvnic_send_crq(adapter, &crq); 1575 1576 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1577 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1578 ibmvnic_send_crq(adapter, &crq); 1579 1580 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1581 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1582 ibmvnic_send_crq(adapter, &crq); 1583 1584 crq.request_capability.capability = 1585 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1586 crq.request_capability.number = 1587 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1588 ibmvnic_send_crq(adapter, &crq); 1589 1590 crq.request_capability.capability = 1591 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1592 crq.request_capability.number = 1593 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1594 ibmvnic_send_crq(adapter, &crq); 1595 1596 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1597 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1598 ibmvnic_send_crq(adapter, &crq); 1599 1600 if (adapter->netdev->flags & IFF_PROMISC) { 1601 if (adapter->promisc_supported) { 1602 crq.request_capability.capability = 1603 cpu_to_be16(PROMISC_REQUESTED); 1604 crq.request_capability.number = cpu_to_be64(1); 1605 ibmvnic_send_crq(adapter, &crq); 1606 } 1607 } else { 1608 crq.request_capability.capability = 1609 cpu_to_be16(PROMISC_REQUESTED); 1610 crq.request_capability.number = cpu_to_be64(0); 1611 ibmvnic_send_crq(adapter, &crq); 1612 } 1613 1614 kfree(allqueues); 1615 1616 return; 1617 1618 rx_failed: 1619 kfree(adapter->tx_scrq); 1620 adapter->tx_scrq = NULL; 1621 tx_failed: 1622 for (i = 0; i < registered_queues; i++) 1623 release_sub_crq_queue(adapter, allqueues[i]); 1624 kfree(allqueues); 1625 allqueues_failed: 1626 ibmvnic_remove(adapter->vdev); 1627 } 1628 1629 static int pending_scrq(struct ibmvnic_adapter *adapter, 1630 struct ibmvnic_sub_crq_queue *scrq) 1631 { 1632 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1633 1634 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1635 return 1; 1636 else 1637 return 0; 1638 } 1639 1640 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1641 struct ibmvnic_sub_crq_queue *scrq) 1642 { 1643 union sub_crq *entry; 1644 unsigned long flags; 1645 1646 spin_lock_irqsave(&scrq->lock, flags); 1647 entry = &scrq->msgs[scrq->cur]; 1648 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1649 if (++scrq->cur == scrq->size) 1650 scrq->cur = 0; 1651 } else { 1652 entry = NULL; 1653 } 1654 spin_unlock_irqrestore(&scrq->lock, flags); 1655 1656 return entry; 1657 } 1658 1659 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1660 { 1661 struct ibmvnic_crq_queue *queue = &adapter->crq; 1662 union ibmvnic_crq *crq; 1663 1664 crq = &queue->msgs[queue->cur]; 1665 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1666 if (++queue->cur == queue->size) 1667 queue->cur = 0; 1668 } else { 1669 crq = NULL; 1670 } 1671 1672 return crq; 1673 } 1674 1675 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1676 union sub_crq *sub_crq) 1677 { 1678 unsigned int ua = adapter->vdev->unit_address; 1679 struct device *dev = &adapter->vdev->dev; 1680 u64 *u64_crq = (u64 *)sub_crq; 1681 int rc; 1682 1683 netdev_dbg(adapter->netdev, 1684 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1685 (unsigned long int)cpu_to_be64(remote_handle), 1686 (unsigned long int)cpu_to_be64(u64_crq[0]), 1687 (unsigned long int)cpu_to_be64(u64_crq[1]), 1688 (unsigned long int)cpu_to_be64(u64_crq[2]), 1689 (unsigned long int)cpu_to_be64(u64_crq[3])); 1690 1691 /* Make sure the hypervisor sees the complete request */ 1692 mb(); 1693 1694 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1695 cpu_to_be64(remote_handle), 1696 cpu_to_be64(u64_crq[0]), 1697 cpu_to_be64(u64_crq[1]), 1698 cpu_to_be64(u64_crq[2]), 1699 cpu_to_be64(u64_crq[3])); 1700 1701 if (rc) { 1702 if (rc == H_CLOSED) 1703 dev_warn(dev, "CRQ Queue closed\n"); 1704 dev_err(dev, "Send error (rc=%d)\n", rc); 1705 } 1706 1707 return rc; 1708 } 1709 1710 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1711 u64 remote_handle, u64 ioba, u64 num_entries) 1712 { 1713 unsigned int ua = adapter->vdev->unit_address; 1714 struct device *dev = &adapter->vdev->dev; 1715 int rc; 1716 1717 /* Make sure the hypervisor sees the complete request */ 1718 mb(); 1719 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1720 cpu_to_be64(remote_handle), 1721 ioba, num_entries); 1722 1723 if (rc) { 1724 if (rc == H_CLOSED) 1725 dev_warn(dev, "CRQ Queue closed\n"); 1726 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1727 } 1728 1729 return rc; 1730 } 1731 1732 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1733 union ibmvnic_crq *crq) 1734 { 1735 unsigned int ua = adapter->vdev->unit_address; 1736 struct device *dev = &adapter->vdev->dev; 1737 u64 *u64_crq = (u64 *)crq; 1738 int rc; 1739 1740 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1741 (unsigned long int)cpu_to_be64(u64_crq[0]), 1742 (unsigned long int)cpu_to_be64(u64_crq[1])); 1743 1744 /* Make sure the hypervisor sees the complete request */ 1745 mb(); 1746 1747 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1748 cpu_to_be64(u64_crq[0]), 1749 cpu_to_be64(u64_crq[1])); 1750 1751 if (rc) { 1752 if (rc == H_CLOSED) 1753 dev_warn(dev, "CRQ Queue closed\n"); 1754 dev_warn(dev, "Send error (rc=%d)\n", rc); 1755 } 1756 1757 return rc; 1758 } 1759 1760 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1761 { 1762 union ibmvnic_crq crq; 1763 1764 memset(&crq, 0, sizeof(crq)); 1765 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1766 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1767 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1768 1769 return ibmvnic_send_crq(adapter, &crq); 1770 } 1771 1772 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1773 { 1774 union ibmvnic_crq crq; 1775 1776 memset(&crq, 0, sizeof(crq)); 1777 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1778 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 1779 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 1780 1781 return ibmvnic_send_crq(adapter, &crq); 1782 } 1783 1784 static int send_version_xchg(struct ibmvnic_adapter *adapter) 1785 { 1786 union ibmvnic_crq crq; 1787 1788 memset(&crq, 0, sizeof(crq)); 1789 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 1790 crq.version_exchange.cmd = VERSION_EXCHANGE; 1791 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 1792 1793 return ibmvnic_send_crq(adapter, &crq); 1794 } 1795 1796 static void send_login(struct ibmvnic_adapter *adapter) 1797 { 1798 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 1799 struct ibmvnic_login_buffer *login_buffer; 1800 struct ibmvnic_inflight_cmd *inflight_cmd; 1801 struct device *dev = &adapter->vdev->dev; 1802 dma_addr_t rsp_buffer_token; 1803 dma_addr_t buffer_token; 1804 size_t rsp_buffer_size; 1805 union ibmvnic_crq crq; 1806 unsigned long flags; 1807 size_t buffer_size; 1808 __be64 *tx_list_p; 1809 __be64 *rx_list_p; 1810 int i; 1811 1812 buffer_size = 1813 sizeof(struct ibmvnic_login_buffer) + 1814 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 1815 1816 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 1817 if (!login_buffer) 1818 goto buf_alloc_failed; 1819 1820 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 1821 DMA_TO_DEVICE); 1822 if (dma_mapping_error(dev, buffer_token)) { 1823 dev_err(dev, "Couldn't map login buffer\n"); 1824 goto buf_map_failed; 1825 } 1826 1827 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 1828 sizeof(u64) * adapter->req_tx_queues + 1829 sizeof(u64) * adapter->req_rx_queues + 1830 sizeof(u64) * adapter->req_rx_queues + 1831 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 1832 1833 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 1834 if (!login_rsp_buffer) 1835 goto buf_rsp_alloc_failed; 1836 1837 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 1838 rsp_buffer_size, DMA_FROM_DEVICE); 1839 if (dma_mapping_error(dev, rsp_buffer_token)) { 1840 dev_err(dev, "Couldn't map login rsp buffer\n"); 1841 goto buf_rsp_map_failed; 1842 } 1843 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 1844 if (!inflight_cmd) { 1845 dev_err(dev, "Couldn't allocate inflight_cmd\n"); 1846 goto inflight_alloc_failed; 1847 } 1848 adapter->login_buf = login_buffer; 1849 adapter->login_buf_token = buffer_token; 1850 adapter->login_buf_sz = buffer_size; 1851 adapter->login_rsp_buf = login_rsp_buffer; 1852 adapter->login_rsp_buf_token = rsp_buffer_token; 1853 adapter->login_rsp_buf_sz = rsp_buffer_size; 1854 1855 login_buffer->len = cpu_to_be32(buffer_size); 1856 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 1857 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 1858 login_buffer->off_txcomp_subcrqs = 1859 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 1860 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 1861 login_buffer->off_rxcomp_subcrqs = 1862 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 1863 sizeof(u64) * adapter->req_tx_queues); 1864 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 1865 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 1866 1867 tx_list_p = (__be64 *)((char *)login_buffer + 1868 sizeof(struct ibmvnic_login_buffer)); 1869 rx_list_p = (__be64 *)((char *)login_buffer + 1870 sizeof(struct ibmvnic_login_buffer) + 1871 sizeof(u64) * adapter->req_tx_queues); 1872 1873 for (i = 0; i < adapter->req_tx_queues; i++) { 1874 if (adapter->tx_scrq[i]) { 1875 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 1876 crq_num); 1877 } 1878 } 1879 1880 for (i = 0; i < adapter->req_rx_queues; i++) { 1881 if (adapter->rx_scrq[i]) { 1882 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 1883 crq_num); 1884 } 1885 } 1886 1887 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 1888 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 1889 netdev_dbg(adapter->netdev, "%016lx\n", 1890 ((unsigned long int *)(adapter->login_buf))[i]); 1891 } 1892 1893 memset(&crq, 0, sizeof(crq)); 1894 crq.login.first = IBMVNIC_CRQ_CMD; 1895 crq.login.cmd = LOGIN; 1896 crq.login.ioba = cpu_to_be32(buffer_token); 1897 crq.login.len = cpu_to_be32(buffer_size); 1898 1899 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 1900 1901 spin_lock_irqsave(&adapter->inflight_lock, flags); 1902 list_add_tail(&inflight_cmd->list, &adapter->inflight); 1903 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 1904 1905 ibmvnic_send_crq(adapter, &crq); 1906 1907 return; 1908 1909 inflight_alloc_failed: 1910 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 1911 DMA_FROM_DEVICE); 1912 buf_rsp_map_failed: 1913 kfree(login_rsp_buffer); 1914 buf_rsp_alloc_failed: 1915 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 1916 buf_map_failed: 1917 kfree(login_buffer); 1918 buf_alloc_failed: 1919 return; 1920 } 1921 1922 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 1923 u32 len, u8 map_id) 1924 { 1925 union ibmvnic_crq crq; 1926 1927 memset(&crq, 0, sizeof(crq)); 1928 crq.request_map.first = IBMVNIC_CRQ_CMD; 1929 crq.request_map.cmd = REQUEST_MAP; 1930 crq.request_map.map_id = map_id; 1931 crq.request_map.ioba = cpu_to_be32(addr); 1932 crq.request_map.len = cpu_to_be32(len); 1933 ibmvnic_send_crq(adapter, &crq); 1934 } 1935 1936 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 1937 { 1938 union ibmvnic_crq crq; 1939 1940 memset(&crq, 0, sizeof(crq)); 1941 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 1942 crq.request_unmap.cmd = REQUEST_UNMAP; 1943 crq.request_unmap.map_id = map_id; 1944 ibmvnic_send_crq(adapter, &crq); 1945 } 1946 1947 static void send_map_query(struct ibmvnic_adapter *adapter) 1948 { 1949 union ibmvnic_crq crq; 1950 1951 memset(&crq, 0, sizeof(crq)); 1952 crq.query_map.first = IBMVNIC_CRQ_CMD; 1953 crq.query_map.cmd = QUERY_MAP; 1954 ibmvnic_send_crq(adapter, &crq); 1955 } 1956 1957 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 1958 static void send_cap_queries(struct ibmvnic_adapter *adapter) 1959 { 1960 union ibmvnic_crq crq; 1961 1962 atomic_set(&adapter->running_cap_queries, 0); 1963 memset(&crq, 0, sizeof(crq)); 1964 crq.query_capability.first = IBMVNIC_CRQ_CMD; 1965 crq.query_capability.cmd = QUERY_CAPABILITY; 1966 1967 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 1968 atomic_inc(&adapter->running_cap_queries); 1969 ibmvnic_send_crq(adapter, &crq); 1970 1971 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 1972 atomic_inc(&adapter->running_cap_queries); 1973 ibmvnic_send_crq(adapter, &crq); 1974 1975 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 1976 atomic_inc(&adapter->running_cap_queries); 1977 ibmvnic_send_crq(adapter, &crq); 1978 1979 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 1980 atomic_inc(&adapter->running_cap_queries); 1981 ibmvnic_send_crq(adapter, &crq); 1982 1983 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 1984 atomic_inc(&adapter->running_cap_queries); 1985 ibmvnic_send_crq(adapter, &crq); 1986 1987 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 1988 atomic_inc(&adapter->running_cap_queries); 1989 ibmvnic_send_crq(adapter, &crq); 1990 1991 crq.query_capability.capability = 1992 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 1993 atomic_inc(&adapter->running_cap_queries); 1994 ibmvnic_send_crq(adapter, &crq); 1995 1996 crq.query_capability.capability = 1997 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 1998 atomic_inc(&adapter->running_cap_queries); 1999 ibmvnic_send_crq(adapter, &crq); 2000 2001 crq.query_capability.capability = 2002 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2003 atomic_inc(&adapter->running_cap_queries); 2004 ibmvnic_send_crq(adapter, &crq); 2005 2006 crq.query_capability.capability = 2007 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2008 atomic_inc(&adapter->running_cap_queries); 2009 ibmvnic_send_crq(adapter, &crq); 2010 2011 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2012 atomic_inc(&adapter->running_cap_queries); 2013 ibmvnic_send_crq(adapter, &crq); 2014 2015 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2016 atomic_inc(&adapter->running_cap_queries); 2017 ibmvnic_send_crq(adapter, &crq); 2018 2019 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2020 atomic_inc(&adapter->running_cap_queries); 2021 ibmvnic_send_crq(adapter, &crq); 2022 2023 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2024 atomic_inc(&adapter->running_cap_queries); 2025 ibmvnic_send_crq(adapter, &crq); 2026 2027 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2028 atomic_inc(&adapter->running_cap_queries); 2029 ibmvnic_send_crq(adapter, &crq); 2030 2031 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2032 atomic_inc(&adapter->running_cap_queries); 2033 ibmvnic_send_crq(adapter, &crq); 2034 2035 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2036 atomic_inc(&adapter->running_cap_queries); 2037 ibmvnic_send_crq(adapter, &crq); 2038 2039 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2040 atomic_inc(&adapter->running_cap_queries); 2041 ibmvnic_send_crq(adapter, &crq); 2042 2043 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2044 atomic_inc(&adapter->running_cap_queries); 2045 ibmvnic_send_crq(adapter, &crq); 2046 2047 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2048 atomic_inc(&adapter->running_cap_queries); 2049 ibmvnic_send_crq(adapter, &crq); 2050 2051 crq.query_capability.capability = 2052 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2053 atomic_inc(&adapter->running_cap_queries); 2054 ibmvnic_send_crq(adapter, &crq); 2055 2056 crq.query_capability.capability = 2057 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2058 atomic_inc(&adapter->running_cap_queries); 2059 ibmvnic_send_crq(adapter, &crq); 2060 2061 crq.query_capability.capability = 2062 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2063 atomic_inc(&adapter->running_cap_queries); 2064 ibmvnic_send_crq(adapter, &crq); 2065 2066 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2067 atomic_inc(&adapter->running_cap_queries); 2068 ibmvnic_send_crq(adapter, &crq); 2069 } 2070 2071 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2072 { 2073 struct device *dev = &adapter->vdev->dev; 2074 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2075 union ibmvnic_crq crq; 2076 int i; 2077 2078 dma_unmap_single(dev, adapter->ip_offload_tok, 2079 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2080 2081 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2082 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2083 netdev_dbg(adapter->netdev, "%016lx\n", 2084 ((unsigned long int *)(buf))[i]); 2085 2086 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2087 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2088 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2089 buf->tcp_ipv4_chksum); 2090 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2091 buf->tcp_ipv6_chksum); 2092 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2093 buf->udp_ipv4_chksum); 2094 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2095 buf->udp_ipv6_chksum); 2096 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2097 buf->large_tx_ipv4); 2098 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2099 buf->large_tx_ipv6); 2100 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2101 buf->large_rx_ipv4); 2102 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2103 buf->large_rx_ipv6); 2104 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2105 buf->max_ipv4_header_size); 2106 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2107 buf->max_ipv6_header_size); 2108 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2109 buf->max_tcp_header_size); 2110 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2111 buf->max_udp_header_size); 2112 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2113 buf->max_large_tx_size); 2114 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2115 buf->max_large_rx_size); 2116 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2117 buf->ipv6_extension_header); 2118 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2119 buf->tcp_pseudosum_req); 2120 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2121 buf->num_ipv6_ext_headers); 2122 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2123 buf->off_ipv6_ext_headers); 2124 2125 adapter->ip_offload_ctrl_tok = 2126 dma_map_single(dev, &adapter->ip_offload_ctrl, 2127 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2128 2129 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2130 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2131 return; 2132 } 2133 2134 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2135 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2136 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2137 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2138 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2139 2140 /* large_tx/rx disabled for now, additional features needed */ 2141 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2142 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2143 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2144 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2145 2146 adapter->netdev->features = NETIF_F_GSO; 2147 2148 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2149 adapter->netdev->features |= NETIF_F_IP_CSUM; 2150 2151 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2152 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2153 2154 if ((adapter->netdev->features & 2155 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2156 adapter->netdev->features |= NETIF_F_RXCSUM; 2157 2158 memset(&crq, 0, sizeof(crq)); 2159 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2160 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2161 crq.control_ip_offload.len = 2162 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2163 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2164 ibmvnic_send_crq(adapter, &crq); 2165 } 2166 2167 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2168 struct ibmvnic_adapter *adapter) 2169 { 2170 struct device *dev = &adapter->vdev->dev; 2171 struct ibmvnic_error_buff *error_buff, *tmp; 2172 unsigned long flags; 2173 bool found = false; 2174 int i; 2175 2176 if (!crq->request_error_rsp.rc.code) { 2177 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2178 crq->request_error_rsp.rc.code); 2179 return; 2180 } 2181 2182 spin_lock_irqsave(&adapter->error_list_lock, flags); 2183 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2184 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2185 found = true; 2186 list_del(&error_buff->list); 2187 break; 2188 } 2189 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2190 2191 if (!found) { 2192 dev_err(dev, "Couldn't find error id %x\n", 2193 crq->request_error_rsp.error_id); 2194 return; 2195 } 2196 2197 dev_err(dev, "Detailed info for error id %x:", 2198 crq->request_error_rsp.error_id); 2199 2200 for (i = 0; i < error_buff->len; i++) { 2201 pr_cont("%02x", (int)error_buff->buff[i]); 2202 if (i % 8 == 7) 2203 pr_cont(" "); 2204 } 2205 pr_cont("\n"); 2206 2207 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2208 DMA_FROM_DEVICE); 2209 kfree(error_buff->buff); 2210 kfree(error_buff); 2211 } 2212 2213 static void handle_dump_size_rsp(union ibmvnic_crq *crq, 2214 struct ibmvnic_adapter *adapter) 2215 { 2216 int len = be32_to_cpu(crq->request_dump_size_rsp.len); 2217 struct ibmvnic_inflight_cmd *inflight_cmd; 2218 struct device *dev = &adapter->vdev->dev; 2219 union ibmvnic_crq newcrq; 2220 unsigned long flags; 2221 2222 /* allocate and map buffer */ 2223 adapter->dump_data = kmalloc(len, GFP_KERNEL); 2224 if (!adapter->dump_data) { 2225 complete(&adapter->fw_done); 2226 return; 2227 } 2228 2229 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, 2230 DMA_FROM_DEVICE); 2231 2232 if (dma_mapping_error(dev, adapter->dump_data_token)) { 2233 if (!firmware_has_feature(FW_FEATURE_CMO)) 2234 dev_err(dev, "Couldn't map dump data\n"); 2235 kfree(adapter->dump_data); 2236 complete(&adapter->fw_done); 2237 return; 2238 } 2239 2240 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2241 if (!inflight_cmd) { 2242 dma_unmap_single(dev, adapter->dump_data_token, len, 2243 DMA_FROM_DEVICE); 2244 kfree(adapter->dump_data); 2245 complete(&adapter->fw_done); 2246 return; 2247 } 2248 2249 memset(&newcrq, 0, sizeof(newcrq)); 2250 newcrq.request_dump.first = IBMVNIC_CRQ_CMD; 2251 newcrq.request_dump.cmd = REQUEST_DUMP; 2252 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); 2253 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); 2254 2255 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); 2256 2257 spin_lock_irqsave(&adapter->inflight_lock, flags); 2258 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2259 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2260 2261 ibmvnic_send_crq(adapter, &newcrq); 2262 } 2263 2264 static void handle_error_indication(union ibmvnic_crq *crq, 2265 struct ibmvnic_adapter *adapter) 2266 { 2267 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); 2268 struct ibmvnic_inflight_cmd *inflight_cmd; 2269 struct device *dev = &adapter->vdev->dev; 2270 struct ibmvnic_error_buff *error_buff; 2271 union ibmvnic_crq new_crq; 2272 unsigned long flags; 2273 2274 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2275 crq->error_indication. 2276 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2277 crq->error_indication.error_id, 2278 crq->error_indication.error_cause); 2279 2280 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2281 if (!error_buff) 2282 return; 2283 2284 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2285 if (!error_buff->buff) { 2286 kfree(error_buff); 2287 return; 2288 } 2289 2290 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2291 DMA_FROM_DEVICE); 2292 if (dma_mapping_error(dev, error_buff->dma)) { 2293 if (!firmware_has_feature(FW_FEATURE_CMO)) 2294 dev_err(dev, "Couldn't map error buffer\n"); 2295 kfree(error_buff->buff); 2296 kfree(error_buff); 2297 return; 2298 } 2299 2300 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2301 if (!inflight_cmd) { 2302 dma_unmap_single(dev, error_buff->dma, detail_len, 2303 DMA_FROM_DEVICE); 2304 kfree(error_buff->buff); 2305 kfree(error_buff); 2306 return; 2307 } 2308 2309 error_buff->len = detail_len; 2310 error_buff->error_id = crq->error_indication.error_id; 2311 2312 spin_lock_irqsave(&adapter->error_list_lock, flags); 2313 list_add_tail(&error_buff->list, &adapter->errors); 2314 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2315 2316 memset(&new_crq, 0, sizeof(new_crq)); 2317 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2318 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2319 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2320 new_crq.request_error_info.len = cpu_to_be32(detail_len); 2321 new_crq.request_error_info.error_id = crq->error_indication.error_id; 2322 2323 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2324 2325 spin_lock_irqsave(&adapter->inflight_lock, flags); 2326 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2327 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2328 2329 ibmvnic_send_crq(adapter, &new_crq); 2330 } 2331 2332 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2333 struct ibmvnic_adapter *adapter) 2334 { 2335 struct net_device *netdev = adapter->netdev; 2336 struct device *dev = &adapter->vdev->dev; 2337 long rc; 2338 2339 rc = crq->change_mac_addr_rsp.rc.code; 2340 if (rc) { 2341 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2342 return; 2343 } 2344 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2345 ETH_ALEN); 2346 } 2347 2348 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2349 struct ibmvnic_adapter *adapter) 2350 { 2351 struct device *dev = &adapter->vdev->dev; 2352 u64 *req_value; 2353 char *name; 2354 2355 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2356 case REQ_TX_QUEUES: 2357 req_value = &adapter->req_tx_queues; 2358 name = "tx"; 2359 break; 2360 case REQ_RX_QUEUES: 2361 req_value = &adapter->req_rx_queues; 2362 name = "rx"; 2363 break; 2364 case REQ_RX_ADD_QUEUES: 2365 req_value = &adapter->req_rx_add_queues; 2366 name = "rx_add"; 2367 break; 2368 case REQ_TX_ENTRIES_PER_SUBCRQ: 2369 req_value = &adapter->req_tx_entries_per_subcrq; 2370 name = "tx_entries_per_subcrq"; 2371 break; 2372 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2373 req_value = &adapter->req_rx_add_entries_per_subcrq; 2374 name = "rx_add_entries_per_subcrq"; 2375 break; 2376 case REQ_MTU: 2377 req_value = &adapter->req_mtu; 2378 name = "mtu"; 2379 break; 2380 case PROMISC_REQUESTED: 2381 req_value = &adapter->promisc; 2382 name = "promisc"; 2383 break; 2384 default: 2385 dev_err(dev, "Got invalid cap request rsp %d\n", 2386 crq->request_capability.capability); 2387 return; 2388 } 2389 2390 switch (crq->request_capability_rsp.rc.code) { 2391 case SUCCESS: 2392 break; 2393 case PARTIALSUCCESS: 2394 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2395 *req_value, 2396 (long int)be32_to_cpu(crq->request_capability_rsp. 2397 number), name); 2398 release_sub_crqs_no_irqs(adapter); 2399 *req_value = be32_to_cpu(crq->request_capability_rsp.number); 2400 init_sub_crqs(adapter, 1); 2401 return; 2402 default: 2403 dev_err(dev, "Error %d in request cap rsp\n", 2404 crq->request_capability_rsp.rc.code); 2405 return; 2406 } 2407 2408 /* Done receiving requested capabilities, query IP offload support */ 2409 if (++adapter->requested_caps == 7) { 2410 union ibmvnic_crq newcrq; 2411 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2412 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2413 &adapter->ip_offload_buf; 2414 2415 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2416 buf_sz, 2417 DMA_FROM_DEVICE); 2418 2419 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2420 if (!firmware_has_feature(FW_FEATURE_CMO)) 2421 dev_err(dev, "Couldn't map offload buffer\n"); 2422 return; 2423 } 2424 2425 memset(&newcrq, 0, sizeof(newcrq)); 2426 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2427 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2428 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2429 newcrq.query_ip_offload.ioba = 2430 cpu_to_be32(adapter->ip_offload_tok); 2431 2432 ibmvnic_send_crq(adapter, &newcrq); 2433 } 2434 } 2435 2436 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2437 struct ibmvnic_adapter *adapter) 2438 { 2439 struct device *dev = &adapter->vdev->dev; 2440 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2441 struct ibmvnic_login_buffer *login = adapter->login_buf; 2442 union ibmvnic_crq crq; 2443 int i; 2444 2445 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2446 DMA_BIDIRECTIONAL); 2447 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2448 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2449 2450 /* If the number of queues requested can't be allocated by the 2451 * server, the login response will return with code 1. We will need 2452 * to resend the login buffer with fewer queues requested. 2453 */ 2454 if (login_rsp_crq->generic.rc.code) { 2455 adapter->renegotiate = true; 2456 complete(&adapter->init_done); 2457 return 0; 2458 } 2459 2460 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2461 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2462 netdev_dbg(adapter->netdev, "%016lx\n", 2463 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2464 } 2465 2466 /* Sanity checks */ 2467 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2468 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2469 adapter->req_rx_add_queues != 2470 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2471 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2472 ibmvnic_remove(adapter->vdev); 2473 return -EIO; 2474 } 2475 complete(&adapter->init_done); 2476 2477 memset(&crq, 0, sizeof(crq)); 2478 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; 2479 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; 2480 ibmvnic_send_crq(adapter, &crq); 2481 2482 return 0; 2483 } 2484 2485 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2486 struct ibmvnic_adapter *adapter) 2487 { 2488 struct device *dev = &adapter->vdev->dev; 2489 u8 map_id = crq->request_map_rsp.map_id; 2490 int tx_subcrqs; 2491 int rx_subcrqs; 2492 long rc; 2493 int i; 2494 2495 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2496 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2497 2498 rc = crq->request_map_rsp.rc.code; 2499 if (rc) { 2500 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2501 adapter->map_id--; 2502 /* need to find and zero tx/rx_pool map_id */ 2503 for (i = 0; i < tx_subcrqs; i++) { 2504 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2505 adapter->tx_pool[i].long_term_buff.map_id = 0; 2506 } 2507 for (i = 0; i < rx_subcrqs; i++) { 2508 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2509 adapter->rx_pool[i].long_term_buff.map_id = 0; 2510 } 2511 } 2512 complete(&adapter->fw_done); 2513 } 2514 2515 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2516 struct ibmvnic_adapter *adapter) 2517 { 2518 struct device *dev = &adapter->vdev->dev; 2519 long rc; 2520 2521 rc = crq->request_unmap_rsp.rc.code; 2522 if (rc) 2523 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2524 } 2525 2526 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2527 struct ibmvnic_adapter *adapter) 2528 { 2529 struct net_device *netdev = adapter->netdev; 2530 struct device *dev = &adapter->vdev->dev; 2531 long rc; 2532 2533 rc = crq->query_map_rsp.rc.code; 2534 if (rc) { 2535 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2536 return; 2537 } 2538 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2539 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2540 crq->query_map_rsp.free_pages); 2541 } 2542 2543 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2544 struct ibmvnic_adapter *adapter) 2545 { 2546 struct net_device *netdev = adapter->netdev; 2547 struct device *dev = &adapter->vdev->dev; 2548 long rc; 2549 2550 atomic_dec(&adapter->running_cap_queries); 2551 netdev_dbg(netdev, "Outstanding queries: %d\n", 2552 atomic_read(&adapter->running_cap_queries)); 2553 rc = crq->query_capability.rc.code; 2554 if (rc) { 2555 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2556 goto out; 2557 } 2558 2559 switch (be16_to_cpu(crq->query_capability.capability)) { 2560 case MIN_TX_QUEUES: 2561 adapter->min_tx_queues = 2562 be64_to_cpu(crq->query_capability.number); 2563 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2564 adapter->min_tx_queues); 2565 break; 2566 case MIN_RX_QUEUES: 2567 adapter->min_rx_queues = 2568 be64_to_cpu(crq->query_capability.number); 2569 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2570 adapter->min_rx_queues); 2571 break; 2572 case MIN_RX_ADD_QUEUES: 2573 adapter->min_rx_add_queues = 2574 be64_to_cpu(crq->query_capability.number); 2575 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2576 adapter->min_rx_add_queues); 2577 break; 2578 case MAX_TX_QUEUES: 2579 adapter->max_tx_queues = 2580 be64_to_cpu(crq->query_capability.number); 2581 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2582 adapter->max_tx_queues); 2583 break; 2584 case MAX_RX_QUEUES: 2585 adapter->max_rx_queues = 2586 be64_to_cpu(crq->query_capability.number); 2587 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2588 adapter->max_rx_queues); 2589 break; 2590 case MAX_RX_ADD_QUEUES: 2591 adapter->max_rx_add_queues = 2592 be64_to_cpu(crq->query_capability.number); 2593 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2594 adapter->max_rx_add_queues); 2595 break; 2596 case MIN_TX_ENTRIES_PER_SUBCRQ: 2597 adapter->min_tx_entries_per_subcrq = 2598 be64_to_cpu(crq->query_capability.number); 2599 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2600 adapter->min_tx_entries_per_subcrq); 2601 break; 2602 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2603 adapter->min_rx_add_entries_per_subcrq = 2604 be64_to_cpu(crq->query_capability.number); 2605 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2606 adapter->min_rx_add_entries_per_subcrq); 2607 break; 2608 case MAX_TX_ENTRIES_PER_SUBCRQ: 2609 adapter->max_tx_entries_per_subcrq = 2610 be64_to_cpu(crq->query_capability.number); 2611 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2612 adapter->max_tx_entries_per_subcrq); 2613 break; 2614 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2615 adapter->max_rx_add_entries_per_subcrq = 2616 be64_to_cpu(crq->query_capability.number); 2617 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2618 adapter->max_rx_add_entries_per_subcrq); 2619 break; 2620 case TCP_IP_OFFLOAD: 2621 adapter->tcp_ip_offload = 2622 be64_to_cpu(crq->query_capability.number); 2623 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2624 adapter->tcp_ip_offload); 2625 break; 2626 case PROMISC_SUPPORTED: 2627 adapter->promisc_supported = 2628 be64_to_cpu(crq->query_capability.number); 2629 netdev_dbg(netdev, "promisc_supported = %lld\n", 2630 adapter->promisc_supported); 2631 break; 2632 case MIN_MTU: 2633 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2634 netdev->min_mtu = adapter->min_mtu; 2635 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2636 break; 2637 case MAX_MTU: 2638 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2639 netdev->max_mtu = adapter->max_mtu; 2640 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2641 break; 2642 case MAX_MULTICAST_FILTERS: 2643 adapter->max_multicast_filters = 2644 be64_to_cpu(crq->query_capability.number); 2645 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2646 adapter->max_multicast_filters); 2647 break; 2648 case VLAN_HEADER_INSERTION: 2649 adapter->vlan_header_insertion = 2650 be64_to_cpu(crq->query_capability.number); 2651 if (adapter->vlan_header_insertion) 2652 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2653 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2654 adapter->vlan_header_insertion); 2655 break; 2656 case MAX_TX_SG_ENTRIES: 2657 adapter->max_tx_sg_entries = 2658 be64_to_cpu(crq->query_capability.number); 2659 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2660 adapter->max_tx_sg_entries); 2661 break; 2662 case RX_SG_SUPPORTED: 2663 adapter->rx_sg_supported = 2664 be64_to_cpu(crq->query_capability.number); 2665 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2666 adapter->rx_sg_supported); 2667 break; 2668 case OPT_TX_COMP_SUB_QUEUES: 2669 adapter->opt_tx_comp_sub_queues = 2670 be64_to_cpu(crq->query_capability.number); 2671 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2672 adapter->opt_tx_comp_sub_queues); 2673 break; 2674 case OPT_RX_COMP_QUEUES: 2675 adapter->opt_rx_comp_queues = 2676 be64_to_cpu(crq->query_capability.number); 2677 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2678 adapter->opt_rx_comp_queues); 2679 break; 2680 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2681 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2682 be64_to_cpu(crq->query_capability.number); 2683 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2684 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2685 break; 2686 case OPT_TX_ENTRIES_PER_SUBCRQ: 2687 adapter->opt_tx_entries_per_subcrq = 2688 be64_to_cpu(crq->query_capability.number); 2689 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2690 adapter->opt_tx_entries_per_subcrq); 2691 break; 2692 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2693 adapter->opt_rxba_entries_per_subcrq = 2694 be64_to_cpu(crq->query_capability.number); 2695 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2696 adapter->opt_rxba_entries_per_subcrq); 2697 break; 2698 case TX_RX_DESC_REQ: 2699 adapter->tx_rx_desc_req = crq->query_capability.number; 2700 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2701 adapter->tx_rx_desc_req); 2702 break; 2703 2704 default: 2705 netdev_err(netdev, "Got invalid cap rsp %d\n", 2706 crq->query_capability.capability); 2707 } 2708 2709 out: 2710 if (atomic_read(&adapter->running_cap_queries) == 0) 2711 init_sub_crqs(adapter, 0); 2712 /* We're done querying the capabilities, initialize sub-crqs */ 2713 } 2714 2715 static void handle_control_ras_rsp(union ibmvnic_crq *crq, 2716 struct ibmvnic_adapter *adapter) 2717 { 2718 u8 correlator = crq->control_ras_rsp.correlator; 2719 struct device *dev = &adapter->vdev->dev; 2720 bool found = false; 2721 int i; 2722 2723 if (crq->control_ras_rsp.rc.code) { 2724 dev_warn(dev, "Control ras failed rc=%d\n", 2725 crq->control_ras_rsp.rc.code); 2726 return; 2727 } 2728 2729 for (i = 0; i < adapter->ras_comp_num; i++) { 2730 if (adapter->ras_comps[i].correlator == correlator) { 2731 found = true; 2732 break; 2733 } 2734 } 2735 2736 if (!found) { 2737 dev_warn(dev, "Correlator not found on control_ras_rsp\n"); 2738 return; 2739 } 2740 2741 switch (crq->control_ras_rsp.op) { 2742 case IBMVNIC_TRACE_LEVEL: 2743 adapter->ras_comps[i].trace_level = crq->control_ras.level; 2744 break; 2745 case IBMVNIC_ERROR_LEVEL: 2746 adapter->ras_comps[i].error_check_level = 2747 crq->control_ras.level; 2748 break; 2749 case IBMVNIC_TRACE_PAUSE: 2750 adapter->ras_comp_int[i].paused = 1; 2751 break; 2752 case IBMVNIC_TRACE_RESUME: 2753 adapter->ras_comp_int[i].paused = 0; 2754 break; 2755 case IBMVNIC_TRACE_ON: 2756 adapter->ras_comps[i].trace_on = 1; 2757 break; 2758 case IBMVNIC_TRACE_OFF: 2759 adapter->ras_comps[i].trace_on = 0; 2760 break; 2761 case IBMVNIC_CHG_TRACE_BUFF_SZ: 2762 /* trace_buff_sz is 3 bytes, stuff it into an int */ 2763 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; 2764 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = 2765 crq->control_ras_rsp.trace_buff_sz[0]; 2766 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = 2767 crq->control_ras_rsp.trace_buff_sz[1]; 2768 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = 2769 crq->control_ras_rsp.trace_buff_sz[2]; 2770 break; 2771 default: 2772 dev_err(dev, "invalid op %d on control_ras_rsp", 2773 crq->control_ras_rsp.op); 2774 } 2775 } 2776 2777 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, 2778 loff_t *ppos) 2779 { 2780 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2781 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2782 struct device *dev = &adapter->vdev->dev; 2783 struct ibmvnic_fw_trace_entry *trace; 2784 int num = ras_comp_int->num; 2785 union ibmvnic_crq crq; 2786 dma_addr_t trace_tok; 2787 2788 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2789 return 0; 2790 2791 trace = 2792 dma_alloc_coherent(dev, 2793 be32_to_cpu(adapter->ras_comps[num]. 2794 trace_buff_size), &trace_tok, 2795 GFP_KERNEL); 2796 if (!trace) { 2797 dev_err(dev, "Couldn't alloc trace buffer\n"); 2798 return 0; 2799 } 2800 2801 memset(&crq, 0, sizeof(crq)); 2802 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; 2803 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; 2804 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; 2805 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); 2806 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; 2807 ibmvnic_send_crq(adapter, &crq); 2808 2809 init_completion(&adapter->fw_done); 2810 wait_for_completion(&adapter->fw_done); 2811 2812 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) 2813 len = 2814 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - 2815 *ppos; 2816 2817 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); 2818 2819 dma_free_coherent(dev, 2820 be32_to_cpu(adapter->ras_comps[num].trace_buff_size), 2821 trace, trace_tok); 2822 *ppos += len; 2823 return len; 2824 } 2825 2826 static const struct file_operations trace_ops = { 2827 .owner = THIS_MODULE, 2828 .open = simple_open, 2829 .read = trace_read, 2830 }; 2831 2832 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, 2833 loff_t *ppos) 2834 { 2835 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2836 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2837 int num = ras_comp_int->num; 2838 char buff[5]; /* 1 or 0 plus \n and \0 */ 2839 int size; 2840 2841 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); 2842 2843 if (*ppos >= size) 2844 return 0; 2845 2846 copy_to_user(user_buf, buff, size); 2847 *ppos += size; 2848 return size; 2849 } 2850 2851 static ssize_t paused_write(struct file *file, const char __user *user_buf, 2852 size_t len, loff_t *ppos) 2853 { 2854 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2855 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2856 int num = ras_comp_int->num; 2857 union ibmvnic_crq crq; 2858 unsigned long val; 2859 char buff[9]; /* decimal max int plus \n and \0 */ 2860 2861 copy_from_user(buff, user_buf, sizeof(buff)); 2862 val = kstrtoul(buff, 10, NULL); 2863 2864 adapter->ras_comp_int[num].paused = val ? 1 : 0; 2865 2866 memset(&crq, 0, sizeof(crq)); 2867 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2868 crq.control_ras.cmd = CONTROL_RAS; 2869 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2870 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; 2871 ibmvnic_send_crq(adapter, &crq); 2872 2873 return len; 2874 } 2875 2876 static const struct file_operations paused_ops = { 2877 .owner = THIS_MODULE, 2878 .open = simple_open, 2879 .read = paused_read, 2880 .write = paused_write, 2881 }; 2882 2883 static ssize_t tracing_read(struct file *file, char __user *user_buf, 2884 size_t len, loff_t *ppos) 2885 { 2886 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2887 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2888 int num = ras_comp_int->num; 2889 char buff[5]; /* 1 or 0 plus \n and \0 */ 2890 int size; 2891 2892 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); 2893 2894 if (*ppos >= size) 2895 return 0; 2896 2897 copy_to_user(user_buf, buff, size); 2898 *ppos += size; 2899 return size; 2900 } 2901 2902 static ssize_t tracing_write(struct file *file, const char __user *user_buf, 2903 size_t len, loff_t *ppos) 2904 { 2905 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2906 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2907 int num = ras_comp_int->num; 2908 union ibmvnic_crq crq; 2909 unsigned long val; 2910 char buff[9]; /* decimal max int plus \n and \0 */ 2911 2912 copy_from_user(buff, user_buf, sizeof(buff)); 2913 val = kstrtoul(buff, 10, NULL); 2914 2915 memset(&crq, 0, sizeof(crq)); 2916 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2917 crq.control_ras.cmd = CONTROL_RAS; 2918 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2919 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; 2920 2921 return len; 2922 } 2923 2924 static const struct file_operations tracing_ops = { 2925 .owner = THIS_MODULE, 2926 .open = simple_open, 2927 .read = tracing_read, 2928 .write = tracing_write, 2929 }; 2930 2931 static ssize_t error_level_read(struct file *file, char __user *user_buf, 2932 size_t len, loff_t *ppos) 2933 { 2934 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2935 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2936 int num = ras_comp_int->num; 2937 char buff[5]; /* decimal max char plus \n and \0 */ 2938 int size; 2939 2940 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); 2941 2942 if (*ppos >= size) 2943 return 0; 2944 2945 copy_to_user(user_buf, buff, size); 2946 *ppos += size; 2947 return size; 2948 } 2949 2950 static ssize_t error_level_write(struct file *file, const char __user *user_buf, 2951 size_t len, loff_t *ppos) 2952 { 2953 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2954 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2955 int num = ras_comp_int->num; 2956 union ibmvnic_crq crq; 2957 unsigned long val; 2958 char buff[9]; /* decimal max int plus \n and \0 */ 2959 2960 copy_from_user(buff, user_buf, sizeof(buff)); 2961 val = kstrtoul(buff, 10, NULL); 2962 2963 if (val > 9) 2964 val = 9; 2965 2966 memset(&crq, 0, sizeof(crq)); 2967 crq.control_ras.first = IBMVNIC_CRQ_CMD; 2968 crq.control_ras.cmd = CONTROL_RAS; 2969 crq.control_ras.correlator = adapter->ras_comps[num].correlator; 2970 crq.control_ras.op = IBMVNIC_ERROR_LEVEL; 2971 crq.control_ras.level = val; 2972 ibmvnic_send_crq(adapter, &crq); 2973 2974 return len; 2975 } 2976 2977 static const struct file_operations error_level_ops = { 2978 .owner = THIS_MODULE, 2979 .open = simple_open, 2980 .read = error_level_read, 2981 .write = error_level_write, 2982 }; 2983 2984 static ssize_t trace_level_read(struct file *file, char __user *user_buf, 2985 size_t len, loff_t *ppos) 2986 { 2987 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 2988 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 2989 int num = ras_comp_int->num; 2990 char buff[5]; /* decimal max char plus \n and \0 */ 2991 int size; 2992 2993 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); 2994 if (*ppos >= size) 2995 return 0; 2996 2997 copy_to_user(user_buf, buff, size); 2998 *ppos += size; 2999 return size; 3000 } 3001 3002 static ssize_t trace_level_write(struct file *file, const char __user *user_buf, 3003 size_t len, loff_t *ppos) 3004 { 3005 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3006 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3007 union ibmvnic_crq crq; 3008 unsigned long val; 3009 char buff[9]; /* decimal max int plus \n and \0 */ 3010 3011 copy_from_user(buff, user_buf, sizeof(buff)); 3012 val = kstrtoul(buff, 10, NULL); 3013 if (val > 9) 3014 val = 9; 3015 3016 memset(&crq, 0, sizeof(crq)); 3017 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3018 crq.control_ras.cmd = CONTROL_RAS; 3019 crq.control_ras.correlator = 3020 adapter->ras_comps[ras_comp_int->num].correlator; 3021 crq.control_ras.op = IBMVNIC_TRACE_LEVEL; 3022 crq.control_ras.level = val; 3023 ibmvnic_send_crq(adapter, &crq); 3024 3025 return len; 3026 } 3027 3028 static const struct file_operations trace_level_ops = { 3029 .owner = THIS_MODULE, 3030 .open = simple_open, 3031 .read = trace_level_read, 3032 .write = trace_level_write, 3033 }; 3034 3035 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, 3036 size_t len, loff_t *ppos) 3037 { 3038 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3039 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3040 int num = ras_comp_int->num; 3041 char buff[9]; /* decimal max int plus \n and \0 */ 3042 int size; 3043 3044 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); 3045 if (*ppos >= size) 3046 return 0; 3047 3048 copy_to_user(user_buf, buff, size); 3049 *ppos += size; 3050 return size; 3051 } 3052 3053 static ssize_t trace_buff_size_write(struct file *file, 3054 const char __user *user_buf, size_t len, 3055 loff_t *ppos) 3056 { 3057 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; 3058 struct ibmvnic_adapter *adapter = ras_comp_int->adapter; 3059 union ibmvnic_crq crq; 3060 unsigned long val; 3061 char buff[9]; /* decimal max int plus \n and \0 */ 3062 3063 copy_from_user(buff, user_buf, sizeof(buff)); 3064 val = kstrtoul(buff, 10, NULL); 3065 3066 memset(&crq, 0, sizeof(crq)); 3067 crq.control_ras.first = IBMVNIC_CRQ_CMD; 3068 crq.control_ras.cmd = CONTROL_RAS; 3069 crq.control_ras.correlator = 3070 adapter->ras_comps[ras_comp_int->num].correlator; 3071 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; 3072 /* trace_buff_sz is 3 bytes, stuff an int into it */ 3073 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; 3074 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; 3075 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; 3076 ibmvnic_send_crq(adapter, &crq); 3077 3078 return len; 3079 } 3080 3081 static const struct file_operations trace_size_ops = { 3082 .owner = THIS_MODULE, 3083 .open = simple_open, 3084 .read = trace_buff_size_read, 3085 .write = trace_buff_size_write, 3086 }; 3087 3088 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, 3089 struct ibmvnic_adapter *adapter) 3090 { 3091 struct device *dev = &adapter->vdev->dev; 3092 struct dentry *dir_ent; 3093 struct dentry *ent; 3094 int i; 3095 3096 debugfs_remove_recursive(adapter->ras_comps_ent); 3097 3098 adapter->ras_comps_ent = debugfs_create_dir("ras_comps", 3099 adapter->debugfs_dir); 3100 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { 3101 dev_info(dev, "debugfs create ras_comps dir failed\n"); 3102 return; 3103 } 3104 3105 for (i = 0; i < adapter->ras_comp_num; i++) { 3106 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, 3107 adapter->ras_comps_ent); 3108 if (!dir_ent || IS_ERR(dir_ent)) { 3109 dev_info(dev, "debugfs create %s dir failed\n", 3110 adapter->ras_comps[i].name); 3111 continue; 3112 } 3113 3114 adapter->ras_comp_int[i].adapter = adapter; 3115 adapter->ras_comp_int[i].num = i; 3116 adapter->ras_comp_int[i].desc_blob.data = 3117 &adapter->ras_comps[i].description; 3118 adapter->ras_comp_int[i].desc_blob.size = 3119 sizeof(adapter->ras_comps[i].description); 3120 3121 /* Don't need to remember the dentry's because the debugfs dir 3122 * gets removed recursively 3123 */ 3124 ent = debugfs_create_blob("description", S_IRUGO, dir_ent, 3125 &adapter->ras_comp_int[i].desc_blob); 3126 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, 3127 dir_ent, &adapter->ras_comp_int[i], 3128 &trace_size_ops); 3129 ent = debugfs_create_file("trace_level", 3130 S_IRUGO | 3131 (adapter->ras_comps[i].trace_level != 3132 0xFF ? S_IWUSR : 0), 3133 dir_ent, &adapter->ras_comp_int[i], 3134 &trace_level_ops); 3135 ent = debugfs_create_file("error_level", 3136 S_IRUGO | 3137 (adapter-> 3138 ras_comps[i].error_check_level != 3139 0xFF ? S_IWUSR : 0), 3140 dir_ent, &adapter->ras_comp_int[i], 3141 &trace_level_ops); 3142 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, 3143 dir_ent, &adapter->ras_comp_int[i], 3144 &tracing_ops); 3145 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, 3146 dir_ent, &adapter->ras_comp_int[i], 3147 &paused_ops); 3148 ent = debugfs_create_file("trace", S_IRUGO, dir_ent, 3149 &adapter->ras_comp_int[i], 3150 &trace_ops); 3151 } 3152 } 3153 3154 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, 3155 struct ibmvnic_adapter *adapter) 3156 { 3157 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); 3158 struct device *dev = &adapter->vdev->dev; 3159 union ibmvnic_crq newcrq; 3160 3161 adapter->ras_comps = dma_alloc_coherent(dev, len, 3162 &adapter->ras_comps_tok, 3163 GFP_KERNEL); 3164 if (!adapter->ras_comps) { 3165 if (!firmware_has_feature(FW_FEATURE_CMO)) 3166 dev_err(dev, "Couldn't alloc fw comps buffer\n"); 3167 return; 3168 } 3169 3170 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * 3171 sizeof(struct ibmvnic_fw_comp_internal), 3172 GFP_KERNEL); 3173 if (!adapter->ras_comp_int) 3174 dma_free_coherent(dev, len, adapter->ras_comps, 3175 adapter->ras_comps_tok); 3176 3177 memset(&newcrq, 0, sizeof(newcrq)); 3178 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; 3179 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; 3180 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); 3181 newcrq.request_ras_comps.len = cpu_to_be32(len); 3182 ibmvnic_send_crq(adapter, &newcrq); 3183 } 3184 3185 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) 3186 { 3187 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; 3188 struct device *dev = &adapter->vdev->dev; 3189 struct ibmvnic_error_buff *error_buff, *tmp2; 3190 unsigned long flags; 3191 unsigned long flags2; 3192 3193 spin_lock_irqsave(&adapter->inflight_lock, flags); 3194 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { 3195 switch (inflight_cmd->crq.generic.cmd) { 3196 case LOGIN: 3197 dma_unmap_single(dev, adapter->login_buf_token, 3198 adapter->login_buf_sz, 3199 DMA_BIDIRECTIONAL); 3200 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3201 adapter->login_rsp_buf_sz, 3202 DMA_BIDIRECTIONAL); 3203 kfree(adapter->login_rsp_buf); 3204 kfree(adapter->login_buf); 3205 break; 3206 case REQUEST_DUMP: 3207 complete(&adapter->fw_done); 3208 break; 3209 case REQUEST_ERROR_INFO: 3210 spin_lock_irqsave(&adapter->error_list_lock, flags2); 3211 list_for_each_entry_safe(error_buff, tmp2, 3212 &adapter->errors, list) { 3213 dma_unmap_single(dev, error_buff->dma, 3214 error_buff->len, 3215 DMA_FROM_DEVICE); 3216 kfree(error_buff->buff); 3217 list_del(&error_buff->list); 3218 kfree(error_buff); 3219 } 3220 spin_unlock_irqrestore(&adapter->error_list_lock, 3221 flags2); 3222 break; 3223 } 3224 list_del(&inflight_cmd->list); 3225 kfree(inflight_cmd); 3226 } 3227 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 3228 } 3229 3230 static void ibmvnic_xport_event(struct work_struct *work) 3231 { 3232 struct ibmvnic_adapter *adapter = container_of(work, 3233 struct ibmvnic_adapter, 3234 ibmvnic_xport); 3235 struct device *dev = &adapter->vdev->dev; 3236 long rc; 3237 3238 ibmvnic_free_inflight(adapter); 3239 release_sub_crqs(adapter); 3240 if (adapter->migrated) { 3241 rc = ibmvnic_reenable_crq_queue(adapter); 3242 if (rc) 3243 dev_err(dev, "Error after enable rc=%ld\n", rc); 3244 adapter->migrated = false; 3245 rc = ibmvnic_send_crq_init(adapter); 3246 if (rc) 3247 dev_err(dev, "Error sending init rc=%ld\n", rc); 3248 } 3249 } 3250 3251 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3252 struct ibmvnic_adapter *adapter) 3253 { 3254 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3255 struct net_device *netdev = adapter->netdev; 3256 struct device *dev = &adapter->vdev->dev; 3257 long rc; 3258 3259 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3260 ((unsigned long int *)crq)[0], 3261 ((unsigned long int *)crq)[1]); 3262 switch (gen_crq->first) { 3263 case IBMVNIC_CRQ_INIT_RSP: 3264 switch (gen_crq->cmd) { 3265 case IBMVNIC_CRQ_INIT: 3266 dev_info(dev, "Partner initialized\n"); 3267 /* Send back a response */ 3268 rc = ibmvnic_send_crq_init_complete(adapter); 3269 if (!rc) 3270 schedule_work(&adapter->vnic_crq_init); 3271 else 3272 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 3273 break; 3274 case IBMVNIC_CRQ_INIT_COMPLETE: 3275 dev_info(dev, "Partner initialization complete\n"); 3276 send_version_xchg(adapter); 3277 break; 3278 default: 3279 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3280 } 3281 return; 3282 case IBMVNIC_CRQ_XPORT_EVENT: 3283 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3284 dev_info(dev, "Re-enabling adapter\n"); 3285 adapter->migrated = true; 3286 schedule_work(&adapter->ibmvnic_xport); 3287 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3288 dev_info(dev, "Backing device failover detected\n"); 3289 netif_carrier_off(netdev); 3290 adapter->failover = true; 3291 } else { 3292 /* The adapter lost the connection */ 3293 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3294 gen_crq->cmd); 3295 schedule_work(&adapter->ibmvnic_xport); 3296 } 3297 return; 3298 case IBMVNIC_CRQ_CMD_RSP: 3299 break; 3300 default: 3301 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3302 gen_crq->first); 3303 return; 3304 } 3305 3306 switch (gen_crq->cmd) { 3307 case VERSION_EXCHANGE_RSP: 3308 rc = crq->version_exchange_rsp.rc.code; 3309 if (rc) { 3310 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3311 break; 3312 } 3313 dev_info(dev, "Partner protocol version is %d\n", 3314 crq->version_exchange_rsp.version); 3315 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3316 ibmvnic_version) 3317 ibmvnic_version = 3318 be16_to_cpu(crq->version_exchange_rsp.version); 3319 send_cap_queries(adapter); 3320 break; 3321 case QUERY_CAPABILITY_RSP: 3322 handle_query_cap_rsp(crq, adapter); 3323 break; 3324 case QUERY_MAP_RSP: 3325 handle_query_map_rsp(crq, adapter); 3326 break; 3327 case REQUEST_MAP_RSP: 3328 handle_request_map_rsp(crq, adapter); 3329 break; 3330 case REQUEST_UNMAP_RSP: 3331 handle_request_unmap_rsp(crq, adapter); 3332 break; 3333 case REQUEST_CAPABILITY_RSP: 3334 handle_request_cap_rsp(crq, adapter); 3335 break; 3336 case LOGIN_RSP: 3337 netdev_dbg(netdev, "Got Login Response\n"); 3338 handle_login_rsp(crq, adapter); 3339 break; 3340 case LOGICAL_LINK_STATE_RSP: 3341 netdev_dbg(netdev, "Got Logical Link State Response\n"); 3342 adapter->logical_link_state = 3343 crq->logical_link_state_rsp.link_state; 3344 break; 3345 case LINK_STATE_INDICATION: 3346 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3347 adapter->phys_link_state = 3348 crq->link_state_indication.phys_link_state; 3349 adapter->logical_link_state = 3350 crq->link_state_indication.logical_link_state; 3351 break; 3352 case CHANGE_MAC_ADDR_RSP: 3353 netdev_dbg(netdev, "Got MAC address change Response\n"); 3354 handle_change_mac_rsp(crq, adapter); 3355 break; 3356 case ERROR_INDICATION: 3357 netdev_dbg(netdev, "Got Error Indication\n"); 3358 handle_error_indication(crq, adapter); 3359 break; 3360 case REQUEST_ERROR_RSP: 3361 netdev_dbg(netdev, "Got Error Detail Response\n"); 3362 handle_error_info_rsp(crq, adapter); 3363 break; 3364 case REQUEST_STATISTICS_RSP: 3365 netdev_dbg(netdev, "Got Statistics Response\n"); 3366 complete(&adapter->stats_done); 3367 break; 3368 case REQUEST_DUMP_SIZE_RSP: 3369 netdev_dbg(netdev, "Got Request Dump Size Response\n"); 3370 handle_dump_size_rsp(crq, adapter); 3371 break; 3372 case REQUEST_DUMP_RSP: 3373 netdev_dbg(netdev, "Got Request Dump Response\n"); 3374 complete(&adapter->fw_done); 3375 break; 3376 case QUERY_IP_OFFLOAD_RSP: 3377 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3378 handle_query_ip_offload_rsp(adapter); 3379 break; 3380 case MULTICAST_CTRL_RSP: 3381 netdev_dbg(netdev, "Got multicast control Response\n"); 3382 break; 3383 case CONTROL_IP_OFFLOAD_RSP: 3384 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3385 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3386 sizeof(adapter->ip_offload_ctrl), 3387 DMA_TO_DEVICE); 3388 /* We're done with the queries, perform the login */ 3389 send_login(adapter); 3390 break; 3391 case REQUEST_RAS_COMP_NUM_RSP: 3392 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); 3393 if (crq->request_ras_comp_num_rsp.rc.code == 10) { 3394 netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); 3395 break; 3396 } 3397 adapter->ras_comp_num = 3398 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); 3399 handle_request_ras_comp_num_rsp(crq, adapter); 3400 break; 3401 case REQUEST_RAS_COMPS_RSP: 3402 netdev_dbg(netdev, "Got Request RAS Comps Response\n"); 3403 handle_request_ras_comps_rsp(crq, adapter); 3404 break; 3405 case CONTROL_RAS_RSP: 3406 netdev_dbg(netdev, "Got Control RAS Response\n"); 3407 handle_control_ras_rsp(crq, adapter); 3408 break; 3409 case COLLECT_FW_TRACE_RSP: 3410 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3411 complete(&adapter->fw_done); 3412 break; 3413 default: 3414 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3415 gen_crq->cmd); 3416 } 3417 } 3418 3419 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3420 { 3421 struct ibmvnic_adapter *adapter = instance; 3422 struct ibmvnic_crq_queue *queue = &adapter->crq; 3423 struct vio_dev *vdev = adapter->vdev; 3424 union ibmvnic_crq *crq; 3425 unsigned long flags; 3426 bool done = false; 3427 3428 spin_lock_irqsave(&queue->lock, flags); 3429 vio_disable_interrupts(vdev); 3430 while (!done) { 3431 /* Pull all the valid messages off the CRQ */ 3432 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3433 ibmvnic_handle_crq(crq, adapter); 3434 crq->generic.first = 0; 3435 } 3436 vio_enable_interrupts(vdev); 3437 crq = ibmvnic_next_crq(adapter); 3438 if (crq) { 3439 vio_disable_interrupts(vdev); 3440 ibmvnic_handle_crq(crq, adapter); 3441 crq->generic.first = 0; 3442 } else { 3443 done = true; 3444 } 3445 } 3446 spin_unlock_irqrestore(&queue->lock, flags); 3447 return IRQ_HANDLED; 3448 } 3449 3450 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3451 { 3452 struct vio_dev *vdev = adapter->vdev; 3453 int rc; 3454 3455 do { 3456 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3457 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3458 3459 if (rc) 3460 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3461 3462 return rc; 3463 } 3464 3465 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3466 { 3467 struct ibmvnic_crq_queue *crq = &adapter->crq; 3468 struct device *dev = &adapter->vdev->dev; 3469 struct vio_dev *vdev = adapter->vdev; 3470 int rc; 3471 3472 /* Close the CRQ */ 3473 do { 3474 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3475 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3476 3477 /* Clean out the queue */ 3478 memset(crq->msgs, 0, PAGE_SIZE); 3479 crq->cur = 0; 3480 3481 /* And re-open it again */ 3482 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3483 crq->msg_token, PAGE_SIZE); 3484 3485 if (rc == H_CLOSED) 3486 /* Adapter is good, but other end is not ready */ 3487 dev_warn(dev, "Partner adapter not ready\n"); 3488 else if (rc != 0) 3489 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3490 3491 return rc; 3492 } 3493 3494 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) 3495 { 3496 struct ibmvnic_crq_queue *crq = &adapter->crq; 3497 struct vio_dev *vdev = adapter->vdev; 3498 long rc; 3499 3500 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3501 free_irq(vdev->irq, adapter); 3502 do { 3503 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3504 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3505 3506 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3507 DMA_BIDIRECTIONAL); 3508 free_page((unsigned long)crq->msgs); 3509 } 3510 3511 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) 3512 { 3513 struct ibmvnic_crq_queue *crq = &adapter->crq; 3514 struct device *dev = &adapter->vdev->dev; 3515 struct vio_dev *vdev = adapter->vdev; 3516 int rc, retrc = -ENOMEM; 3517 3518 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3519 /* Should we allocate more than one page? */ 3520 3521 if (!crq->msgs) 3522 return -ENOMEM; 3523 3524 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3525 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3526 DMA_BIDIRECTIONAL); 3527 if (dma_mapping_error(dev, crq->msg_token)) 3528 goto map_failed; 3529 3530 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3531 crq->msg_token, PAGE_SIZE); 3532 3533 if (rc == H_RESOURCE) 3534 /* maybe kexecing and resource is busy. try a reset */ 3535 rc = ibmvnic_reset_crq(adapter); 3536 retrc = rc; 3537 3538 if (rc == H_CLOSED) { 3539 dev_warn(dev, "Partner adapter not ready\n"); 3540 } else if (rc) { 3541 dev_warn(dev, "Error %d opening adapter\n", rc); 3542 goto reg_crq_failed; 3543 } 3544 3545 retrc = 0; 3546 3547 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3548 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3549 adapter); 3550 if (rc) { 3551 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3552 vdev->irq, rc); 3553 goto req_irq_failed; 3554 } 3555 3556 rc = vio_enable_interrupts(vdev); 3557 if (rc) { 3558 dev_err(dev, "Error %d enabling interrupts\n", rc); 3559 goto req_irq_failed; 3560 } 3561 3562 crq->cur = 0; 3563 spin_lock_init(&crq->lock); 3564 3565 return retrc; 3566 3567 req_irq_failed: 3568 do { 3569 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3570 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3571 reg_crq_failed: 3572 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3573 map_failed: 3574 free_page((unsigned long)crq->msgs); 3575 return retrc; 3576 } 3577 3578 /* debugfs for dump */ 3579 static int ibmvnic_dump_show(struct seq_file *seq, void *v) 3580 { 3581 struct net_device *netdev = seq->private; 3582 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3583 struct device *dev = &adapter->vdev->dev; 3584 union ibmvnic_crq crq; 3585 3586 memset(&crq, 0, sizeof(crq)); 3587 crq.request_dump_size.first = IBMVNIC_CRQ_CMD; 3588 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; 3589 ibmvnic_send_crq(adapter, &crq); 3590 3591 init_completion(&adapter->fw_done); 3592 wait_for_completion(&adapter->fw_done); 3593 3594 seq_write(seq, adapter->dump_data, adapter->dump_data_size); 3595 3596 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, 3597 DMA_BIDIRECTIONAL); 3598 3599 kfree(adapter->dump_data); 3600 3601 return 0; 3602 } 3603 3604 static int ibmvnic_dump_open(struct inode *inode, struct file *file) 3605 { 3606 return single_open(file, ibmvnic_dump_show, inode->i_private); 3607 } 3608 3609 static const struct file_operations ibmvnic_dump_ops = { 3610 .owner = THIS_MODULE, 3611 .open = ibmvnic_dump_open, 3612 .read = seq_read, 3613 .llseek = seq_lseek, 3614 .release = single_release, 3615 }; 3616 3617 static void handle_crq_init_rsp(struct work_struct *work) 3618 { 3619 struct ibmvnic_adapter *adapter = container_of(work, 3620 struct ibmvnic_adapter, 3621 vnic_crq_init); 3622 struct device *dev = &adapter->vdev->dev; 3623 struct net_device *netdev = adapter->netdev; 3624 unsigned long timeout = msecs_to_jiffies(30000); 3625 bool restart = false; 3626 int rc; 3627 3628 if (adapter->failover) { 3629 release_sub_crqs(adapter); 3630 if (netif_running(netdev)) { 3631 netif_tx_disable(netdev); 3632 ibmvnic_close(netdev); 3633 restart = true; 3634 } 3635 } 3636 3637 send_version_xchg(adapter); 3638 reinit_completion(&adapter->init_done); 3639 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3640 dev_err(dev, "Passive init timeout\n"); 3641 goto task_failed; 3642 } 3643 3644 do { 3645 if (adapter->renegotiate) { 3646 adapter->renegotiate = false; 3647 release_sub_crqs_no_irqs(adapter); 3648 send_cap_queries(adapter); 3649 3650 reinit_completion(&adapter->init_done); 3651 if (!wait_for_completion_timeout(&adapter->init_done, 3652 timeout)) { 3653 dev_err(dev, "Passive init timeout\n"); 3654 goto task_failed; 3655 } 3656 } 3657 } while (adapter->renegotiate); 3658 rc = init_sub_crq_irqs(adapter); 3659 3660 if (rc) 3661 goto task_failed; 3662 3663 netdev->real_num_tx_queues = adapter->req_tx_queues; 3664 netdev->mtu = adapter->req_mtu; 3665 netdev->min_mtu = adapter->min_mtu; 3666 netdev->max_mtu = adapter->max_mtu; 3667 3668 if (adapter->failover) { 3669 adapter->failover = false; 3670 if (restart) { 3671 rc = ibmvnic_open(netdev); 3672 if (rc) 3673 goto restart_failed; 3674 } 3675 netif_carrier_on(netdev); 3676 return; 3677 } 3678 3679 rc = register_netdev(netdev); 3680 if (rc) { 3681 dev_err(dev, 3682 "failed to register netdev rc=%d\n", rc); 3683 goto register_failed; 3684 } 3685 dev_info(dev, "ibmvnic registered\n"); 3686 3687 return; 3688 3689 restart_failed: 3690 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3691 register_failed: 3692 release_sub_crqs(adapter); 3693 task_failed: 3694 dev_err(dev, "Passive initialization was not successful\n"); 3695 } 3696 3697 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3698 { 3699 unsigned long timeout = msecs_to_jiffies(30000); 3700 struct ibmvnic_adapter *adapter; 3701 struct net_device *netdev; 3702 unsigned char *mac_addr_p; 3703 struct dentry *ent; 3704 char buf[17]; /* debugfs name buf */ 3705 int rc; 3706 3707 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3708 dev->unit_address); 3709 3710 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3711 VETH_MAC_ADDR, NULL); 3712 if (!mac_addr_p) { 3713 dev_err(&dev->dev, 3714 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3715 __FILE__, __LINE__); 3716 return 0; 3717 } 3718 3719 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3720 IBMVNIC_MAX_TX_QUEUES); 3721 if (!netdev) 3722 return -ENOMEM; 3723 3724 adapter = netdev_priv(netdev); 3725 dev_set_drvdata(&dev->dev, netdev); 3726 adapter->vdev = dev; 3727 adapter->netdev = netdev; 3728 adapter->failover = false; 3729 3730 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3731 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3732 netdev->irq = dev->irq; 3733 netdev->netdev_ops = &ibmvnic_netdev_ops; 3734 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3735 SET_NETDEV_DEV(netdev, &dev->dev); 3736 3737 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3738 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3739 3740 spin_lock_init(&adapter->stats_lock); 3741 3742 rc = ibmvnic_init_crq_queue(adapter); 3743 if (rc) { 3744 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); 3745 goto free_netdev; 3746 } 3747 3748 INIT_LIST_HEAD(&adapter->errors); 3749 INIT_LIST_HEAD(&adapter->inflight); 3750 spin_lock_init(&adapter->error_list_lock); 3751 spin_lock_init(&adapter->inflight_lock); 3752 3753 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, 3754 sizeof(struct ibmvnic_statistics), 3755 DMA_FROM_DEVICE); 3756 if (dma_mapping_error(&dev->dev, adapter->stats_token)) { 3757 if (!firmware_has_feature(FW_FEATURE_CMO)) 3758 dev_err(&dev->dev, "Couldn't map stats buffer\n"); 3759 rc = -ENOMEM; 3760 goto free_crq; 3761 } 3762 3763 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); 3764 ent = debugfs_create_dir(buf, NULL); 3765 if (!ent || IS_ERR(ent)) { 3766 dev_info(&dev->dev, "debugfs create directory failed\n"); 3767 adapter->debugfs_dir = NULL; 3768 } else { 3769 adapter->debugfs_dir = ent; 3770 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, 3771 netdev, &ibmvnic_dump_ops); 3772 if (!ent || IS_ERR(ent)) { 3773 dev_info(&dev->dev, 3774 "debugfs create dump file failed\n"); 3775 adapter->debugfs_dump = NULL; 3776 } else { 3777 adapter->debugfs_dump = ent; 3778 } 3779 } 3780 ibmvnic_send_crq_init(adapter); 3781 3782 init_completion(&adapter->init_done); 3783 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) 3784 return 0; 3785 3786 do { 3787 if (adapter->renegotiate) { 3788 adapter->renegotiate = false; 3789 release_sub_crqs_no_irqs(adapter); 3790 send_cap_queries(adapter); 3791 3792 reinit_completion(&adapter->init_done); 3793 if (!wait_for_completion_timeout(&adapter->init_done, 3794 timeout)) 3795 return 0; 3796 } 3797 } while (adapter->renegotiate); 3798 3799 rc = init_sub_crq_irqs(adapter); 3800 if (rc) { 3801 dev_err(&dev->dev, "failed to initialize sub crq irqs\n"); 3802 goto free_debugfs; 3803 } 3804 3805 netdev->real_num_tx_queues = adapter->req_tx_queues; 3806 netdev->mtu = adapter->req_mtu; 3807 3808 rc = register_netdev(netdev); 3809 if (rc) { 3810 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3811 goto free_sub_crqs; 3812 } 3813 dev_info(&dev->dev, "ibmvnic registered\n"); 3814 3815 return 0; 3816 3817 free_sub_crqs: 3818 release_sub_crqs(adapter); 3819 free_debugfs: 3820 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3821 debugfs_remove_recursive(adapter->debugfs_dir); 3822 free_crq: 3823 ibmvnic_release_crq_queue(adapter); 3824 free_netdev: 3825 free_netdev(netdev); 3826 return rc; 3827 } 3828 3829 static int ibmvnic_remove(struct vio_dev *dev) 3830 { 3831 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3832 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3833 3834 unregister_netdev(netdev); 3835 3836 release_sub_crqs(adapter); 3837 3838 ibmvnic_release_crq_queue(adapter); 3839 3840 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) 3841 debugfs_remove_recursive(adapter->debugfs_dir); 3842 3843 dma_unmap_single(&dev->dev, adapter->stats_token, 3844 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); 3845 3846 if (adapter->ras_comps) 3847 dma_free_coherent(&dev->dev, 3848 adapter->ras_comp_num * 3849 sizeof(struct ibmvnic_fw_component), 3850 adapter->ras_comps, adapter->ras_comps_tok); 3851 3852 kfree(adapter->ras_comp_int); 3853 3854 free_netdev(netdev); 3855 dev_set_drvdata(&dev->dev, NULL); 3856 3857 return 0; 3858 } 3859 3860 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3861 { 3862 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3863 struct ibmvnic_adapter *adapter; 3864 struct iommu_table *tbl; 3865 unsigned long ret = 0; 3866 int i; 3867 3868 tbl = get_iommu_table_base(&vdev->dev); 3869 3870 /* netdev inits at probe time along with the structures we need below*/ 3871 if (!netdev) 3872 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3873 3874 adapter = netdev_priv(netdev); 3875 3876 ret += PAGE_SIZE; /* the crq message queue */ 3877 ret += adapter->bounce_buffer_size; 3878 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3879 3880 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3881 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3882 3883 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3884 i++) 3885 ret += adapter->rx_pool[i].size * 3886 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3887 3888 return ret; 3889 } 3890 3891 static int ibmvnic_resume(struct device *dev) 3892 { 3893 struct net_device *netdev = dev_get_drvdata(dev); 3894 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3895 int i; 3896 3897 /* kick the interrupt handlers just in case we lost an interrupt */ 3898 for (i = 0; i < adapter->req_rx_queues; i++) 3899 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3900 adapter->rx_scrq[i]); 3901 3902 return 0; 3903 } 3904 3905 static struct vio_device_id ibmvnic_device_table[] = { 3906 {"network", "IBM,vnic"}, 3907 {"", "" } 3908 }; 3909 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3910 3911 static const struct dev_pm_ops ibmvnic_pm_ops = { 3912 .resume = ibmvnic_resume 3913 }; 3914 3915 static struct vio_driver ibmvnic_driver = { 3916 .id_table = ibmvnic_device_table, 3917 .probe = ibmvnic_probe, 3918 .remove = ibmvnic_remove, 3919 .get_desired_dma = ibmvnic_get_desired_dma, 3920 .name = ibmvnic_driver_name, 3921 .pm = &ibmvnic_pm_ops, 3922 }; 3923 3924 /* module functions */ 3925 static int __init ibmvnic_module_init(void) 3926 { 3927 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3928 IBMVNIC_DRIVER_VERSION); 3929 3930 return vio_register_driver(&ibmvnic_driver); 3931 } 3932 3933 static void __exit ibmvnic_module_exit(void) 3934 { 3935 vio_unregister_driver(&ibmvnic_driver); 3936 } 3937 3938 module_init(ibmvnic_module_init); 3939 module_exit(ibmvnic_module_exit); 3940