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