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