1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * IBM Power Virtual Ethernet Device Driver 4 * 5 * Copyright (C) IBM Corporation, 2003, 2010 6 * 7 * Authors: Dave Larson <larson1@us.ibm.com> 8 * Santiago Leon <santil@linux.vnet.ibm.com> 9 * Brian King <brking@linux.vnet.ibm.com> 10 * Robert Jennings <rcj@linux.vnet.ibm.com> 11 * Anton Blanchard <anton@au.ibm.com> 12 */ 13 14 #include <linux/module.h> 15 #include <linux/types.h> 16 #include <linux/errno.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/kernel.h> 19 #include <linux/netdevice.h> 20 #include <linux/etherdevice.h> 21 #include <linux/skbuff.h> 22 #include <linux/init.h> 23 #include <linux/interrupt.h> 24 #include <linux/mm.h> 25 #include <linux/pm.h> 26 #include <linux/ethtool.h> 27 #include <linux/in.h> 28 #include <linux/ip.h> 29 #include <linux/ipv6.h> 30 #include <linux/slab.h> 31 #include <asm/hvcall.h> 32 #include <linux/atomic.h> 33 #include <asm/vio.h> 34 #include <asm/iommu.h> 35 #include <asm/firmware.h> 36 #include <net/tcp.h> 37 #include <net/ip6_checksum.h> 38 39 #include "ibmveth.h" 40 41 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); 42 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); 43 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); 44 45 static struct kobj_type ktype_veth_pool; 46 47 48 static const char ibmveth_driver_name[] = "ibmveth"; 49 static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; 50 #define ibmveth_driver_version "1.06" 51 52 MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); 53 MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); 54 MODULE_LICENSE("GPL"); 55 MODULE_VERSION(ibmveth_driver_version); 56 57 static unsigned int tx_copybreak __read_mostly = 128; 58 module_param(tx_copybreak, uint, 0644); 59 MODULE_PARM_DESC(tx_copybreak, 60 "Maximum size of packet that is copied to a new buffer on transmit"); 61 62 static unsigned int rx_copybreak __read_mostly = 128; 63 module_param(rx_copybreak, uint, 0644); 64 MODULE_PARM_DESC(rx_copybreak, 65 "Maximum size of packet that is copied to a new buffer on receive"); 66 67 static unsigned int rx_flush __read_mostly = 0; 68 module_param(rx_flush, uint, 0644); 69 MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); 70 71 static bool old_large_send __read_mostly; 72 module_param(old_large_send, bool, 0444); 73 MODULE_PARM_DESC(old_large_send, 74 "Use old large send method on firmware that supports the new method"); 75 76 struct ibmveth_stat { 77 char name[ETH_GSTRING_LEN]; 78 int offset; 79 }; 80 81 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) 82 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) 83 84 static struct ibmveth_stat ibmveth_stats[] = { 85 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, 86 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, 87 { "replenish_add_buff_failure", 88 IBMVETH_STAT_OFF(replenish_add_buff_failure) }, 89 { "replenish_add_buff_success", 90 IBMVETH_STAT_OFF(replenish_add_buff_success) }, 91 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, 92 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, 93 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, 94 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, 95 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, 96 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, 97 { "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) }, 98 { "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) }, 99 { "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) } 100 }; 101 102 /* simple methods of getting data from the current rxq entry */ 103 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) 104 { 105 return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); 106 } 107 108 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) 109 { 110 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> 111 IBMVETH_RXQ_TOGGLE_SHIFT; 112 } 113 114 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) 115 { 116 return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; 117 } 118 119 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) 120 { 121 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; 122 } 123 124 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) 125 { 126 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; 127 } 128 129 static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter) 130 { 131 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT; 132 } 133 134 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) 135 { 136 return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); 137 } 138 139 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) 140 { 141 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; 142 } 143 144 /* setup the initial settings for a buffer pool */ 145 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, 146 u32 pool_index, u32 pool_size, 147 u32 buff_size, u32 pool_active) 148 { 149 pool->size = pool_size; 150 pool->index = pool_index; 151 pool->buff_size = buff_size; 152 pool->threshold = pool_size * 7 / 8; 153 pool->active = pool_active; 154 } 155 156 /* allocate and setup an buffer pool - called during open */ 157 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) 158 { 159 int i; 160 161 pool->free_map = kmalloc_array(pool->size, sizeof(u16), GFP_KERNEL); 162 163 if (!pool->free_map) 164 return -1; 165 166 pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL); 167 if (!pool->dma_addr) { 168 kfree(pool->free_map); 169 pool->free_map = NULL; 170 return -1; 171 } 172 173 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); 174 175 if (!pool->skbuff) { 176 kfree(pool->dma_addr); 177 pool->dma_addr = NULL; 178 179 kfree(pool->free_map); 180 pool->free_map = NULL; 181 return -1; 182 } 183 184 for (i = 0; i < pool->size; ++i) 185 pool->free_map[i] = i; 186 187 atomic_set(&pool->available, 0); 188 pool->producer_index = 0; 189 pool->consumer_index = 0; 190 191 return 0; 192 } 193 194 static inline void ibmveth_flush_buffer(void *addr, unsigned long length) 195 { 196 unsigned long offset; 197 198 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) 199 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); 200 } 201 202 /* replenish the buffers for a pool. note that we don't need to 203 * skb_reserve these since they are used for incoming... 204 */ 205 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, 206 struct ibmveth_buff_pool *pool) 207 { 208 u32 i; 209 u32 count = pool->size - atomic_read(&pool->available); 210 u32 buffers_added = 0; 211 struct sk_buff *skb; 212 unsigned int free_index, index; 213 u64 correlator; 214 unsigned long lpar_rc; 215 dma_addr_t dma_addr; 216 217 mb(); 218 219 for (i = 0; i < count; ++i) { 220 union ibmveth_buf_desc desc; 221 222 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 223 224 if (!skb) { 225 netdev_dbg(adapter->netdev, 226 "replenish: unable to allocate skb\n"); 227 adapter->replenish_no_mem++; 228 break; 229 } 230 231 free_index = pool->consumer_index; 232 pool->consumer_index++; 233 if (pool->consumer_index >= pool->size) 234 pool->consumer_index = 0; 235 index = pool->free_map[free_index]; 236 237 BUG_ON(index == IBM_VETH_INVALID_MAP); 238 BUG_ON(pool->skbuff[index] != NULL); 239 240 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, 241 pool->buff_size, DMA_FROM_DEVICE); 242 243 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 244 goto failure; 245 246 pool->free_map[free_index] = IBM_VETH_INVALID_MAP; 247 pool->dma_addr[index] = dma_addr; 248 pool->skbuff[index] = skb; 249 250 correlator = ((u64)pool->index << 32) | index; 251 *(u64 *)skb->data = correlator; 252 253 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; 254 desc.fields.address = dma_addr; 255 256 if (rx_flush) { 257 unsigned int len = min(pool->buff_size, 258 adapter->netdev->mtu + 259 IBMVETH_BUFF_OH); 260 ibmveth_flush_buffer(skb->data, len); 261 } 262 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, 263 desc.desc); 264 265 if (lpar_rc != H_SUCCESS) { 266 goto failure; 267 } else { 268 buffers_added++; 269 adapter->replenish_add_buff_success++; 270 } 271 } 272 273 mb(); 274 atomic_add(buffers_added, &(pool->available)); 275 return; 276 277 failure: 278 pool->free_map[free_index] = index; 279 pool->skbuff[index] = NULL; 280 if (pool->consumer_index == 0) 281 pool->consumer_index = pool->size - 1; 282 else 283 pool->consumer_index--; 284 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) 285 dma_unmap_single(&adapter->vdev->dev, 286 pool->dma_addr[index], pool->buff_size, 287 DMA_FROM_DEVICE); 288 dev_kfree_skb_any(skb); 289 adapter->replenish_add_buff_failure++; 290 291 mb(); 292 atomic_add(buffers_added, &(pool->available)); 293 } 294 295 /* 296 * The final 8 bytes of the buffer list is a counter of frames dropped 297 * because there was not a buffer in the buffer list capable of holding 298 * the frame. 299 */ 300 static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter) 301 { 302 __be64 *p = adapter->buffer_list_addr + 4096 - 8; 303 304 adapter->rx_no_buffer = be64_to_cpup(p); 305 } 306 307 /* replenish routine */ 308 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) 309 { 310 int i; 311 312 adapter->replenish_task_cycles++; 313 314 for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { 315 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; 316 317 if (pool->active && 318 (atomic_read(&pool->available) < pool->threshold)) 319 ibmveth_replenish_buffer_pool(adapter, pool); 320 } 321 322 ibmveth_update_rx_no_buffer(adapter); 323 } 324 325 /* empty and free ana buffer pool - also used to do cleanup in error paths */ 326 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, 327 struct ibmveth_buff_pool *pool) 328 { 329 int i; 330 331 kfree(pool->free_map); 332 pool->free_map = NULL; 333 334 if (pool->skbuff && pool->dma_addr) { 335 for (i = 0; i < pool->size; ++i) { 336 struct sk_buff *skb = pool->skbuff[i]; 337 if (skb) { 338 dma_unmap_single(&adapter->vdev->dev, 339 pool->dma_addr[i], 340 pool->buff_size, 341 DMA_FROM_DEVICE); 342 dev_kfree_skb_any(skb); 343 pool->skbuff[i] = NULL; 344 } 345 } 346 } 347 348 if (pool->dma_addr) { 349 kfree(pool->dma_addr); 350 pool->dma_addr = NULL; 351 } 352 353 if (pool->skbuff) { 354 kfree(pool->skbuff); 355 pool->skbuff = NULL; 356 } 357 } 358 359 /* remove a buffer from a pool */ 360 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, 361 u64 correlator) 362 { 363 unsigned int pool = correlator >> 32; 364 unsigned int index = correlator & 0xffffffffUL; 365 unsigned int free_index; 366 struct sk_buff *skb; 367 368 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 369 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 370 371 skb = adapter->rx_buff_pool[pool].skbuff[index]; 372 373 BUG_ON(skb == NULL); 374 375 adapter->rx_buff_pool[pool].skbuff[index] = NULL; 376 377 dma_unmap_single(&adapter->vdev->dev, 378 adapter->rx_buff_pool[pool].dma_addr[index], 379 adapter->rx_buff_pool[pool].buff_size, 380 DMA_FROM_DEVICE); 381 382 free_index = adapter->rx_buff_pool[pool].producer_index; 383 adapter->rx_buff_pool[pool].producer_index++; 384 if (adapter->rx_buff_pool[pool].producer_index >= 385 adapter->rx_buff_pool[pool].size) 386 adapter->rx_buff_pool[pool].producer_index = 0; 387 adapter->rx_buff_pool[pool].free_map[free_index] = index; 388 389 mb(); 390 391 atomic_dec(&(adapter->rx_buff_pool[pool].available)); 392 } 393 394 /* get the current buffer on the rx queue */ 395 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) 396 { 397 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; 398 unsigned int pool = correlator >> 32; 399 unsigned int index = correlator & 0xffffffffUL; 400 401 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 402 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 403 404 return adapter->rx_buff_pool[pool].skbuff[index]; 405 } 406 407 /* recycle the current buffer on the rx queue */ 408 static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) 409 { 410 u32 q_index = adapter->rx_queue.index; 411 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; 412 unsigned int pool = correlator >> 32; 413 unsigned int index = correlator & 0xffffffffUL; 414 union ibmveth_buf_desc desc; 415 unsigned long lpar_rc; 416 int ret = 1; 417 418 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 419 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 420 421 if (!adapter->rx_buff_pool[pool].active) { 422 ibmveth_rxq_harvest_buffer(adapter); 423 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); 424 goto out; 425 } 426 427 desc.fields.flags_len = IBMVETH_BUF_VALID | 428 adapter->rx_buff_pool[pool].buff_size; 429 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; 430 431 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); 432 433 if (lpar_rc != H_SUCCESS) { 434 netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " 435 "during recycle rc=%ld", lpar_rc); 436 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); 437 ret = 0; 438 } 439 440 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { 441 adapter->rx_queue.index = 0; 442 adapter->rx_queue.toggle = !adapter->rx_queue.toggle; 443 } 444 445 out: 446 return ret; 447 } 448 449 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) 450 { 451 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); 452 453 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { 454 adapter->rx_queue.index = 0; 455 adapter->rx_queue.toggle = !adapter->rx_queue.toggle; 456 } 457 } 458 459 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, 460 union ibmveth_buf_desc rxq_desc, u64 mac_address) 461 { 462 int rc, try_again = 1; 463 464 /* 465 * After a kexec the adapter will still be open, so our attempt to 466 * open it will fail. So if we get a failure we free the adapter and 467 * try again, but only once. 468 */ 469 retry: 470 rc = h_register_logical_lan(adapter->vdev->unit_address, 471 adapter->buffer_list_dma, rxq_desc.desc, 472 adapter->filter_list_dma, mac_address); 473 474 if (rc != H_SUCCESS && try_again) { 475 do { 476 rc = h_free_logical_lan(adapter->vdev->unit_address); 477 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); 478 479 try_again = 0; 480 goto retry; 481 } 482 483 return rc; 484 } 485 486 static u64 ibmveth_encode_mac_addr(u8 *mac) 487 { 488 int i; 489 u64 encoded = 0; 490 491 for (i = 0; i < ETH_ALEN; i++) 492 encoded = (encoded << 8) | mac[i]; 493 494 return encoded; 495 } 496 497 static int ibmveth_open(struct net_device *netdev) 498 { 499 struct ibmveth_adapter *adapter = netdev_priv(netdev); 500 u64 mac_address; 501 int rxq_entries = 1; 502 unsigned long lpar_rc; 503 int rc; 504 union ibmveth_buf_desc rxq_desc; 505 int i; 506 struct device *dev; 507 508 netdev_dbg(netdev, "open starting\n"); 509 510 napi_enable(&adapter->napi); 511 512 for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 513 rxq_entries += adapter->rx_buff_pool[i].size; 514 515 rc = -ENOMEM; 516 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); 517 if (!adapter->buffer_list_addr) { 518 netdev_err(netdev, "unable to allocate list pages\n"); 519 goto out; 520 } 521 522 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); 523 if (!adapter->filter_list_addr) { 524 netdev_err(netdev, "unable to allocate filter pages\n"); 525 goto out_free_buffer_list; 526 } 527 528 dev = &adapter->vdev->dev; 529 530 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * 531 rxq_entries; 532 adapter->rx_queue.queue_addr = 533 dma_alloc_coherent(dev, adapter->rx_queue.queue_len, 534 &adapter->rx_queue.queue_dma, GFP_KERNEL); 535 if (!adapter->rx_queue.queue_addr) 536 goto out_free_filter_list; 537 538 adapter->buffer_list_dma = dma_map_single(dev, 539 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); 540 if (dma_mapping_error(dev, adapter->buffer_list_dma)) { 541 netdev_err(netdev, "unable to map buffer list pages\n"); 542 goto out_free_queue_mem; 543 } 544 545 adapter->filter_list_dma = dma_map_single(dev, 546 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); 547 if (dma_mapping_error(dev, adapter->filter_list_dma)) { 548 netdev_err(netdev, "unable to map filter list pages\n"); 549 goto out_unmap_buffer_list; 550 } 551 552 adapter->rx_queue.index = 0; 553 adapter->rx_queue.num_slots = rxq_entries; 554 adapter->rx_queue.toggle = 1; 555 556 mac_address = ibmveth_encode_mac_addr(netdev->dev_addr); 557 558 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | 559 adapter->rx_queue.queue_len; 560 rxq_desc.fields.address = adapter->rx_queue.queue_dma; 561 562 netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); 563 netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); 564 netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); 565 566 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); 567 568 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); 569 570 if (lpar_rc != H_SUCCESS) { 571 netdev_err(netdev, "h_register_logical_lan failed with %ld\n", 572 lpar_rc); 573 netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " 574 "desc:0x%llx MAC:0x%llx\n", 575 adapter->buffer_list_dma, 576 adapter->filter_list_dma, 577 rxq_desc.desc, 578 mac_address); 579 rc = -ENONET; 580 goto out_unmap_filter_list; 581 } 582 583 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 584 if (!adapter->rx_buff_pool[i].active) 585 continue; 586 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { 587 netdev_err(netdev, "unable to alloc pool\n"); 588 adapter->rx_buff_pool[i].active = 0; 589 rc = -ENOMEM; 590 goto out_free_buffer_pools; 591 } 592 } 593 594 netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); 595 rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, 596 netdev); 597 if (rc != 0) { 598 netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", 599 netdev->irq, rc); 600 do { 601 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); 602 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); 603 604 goto out_free_buffer_pools; 605 } 606 607 rc = -ENOMEM; 608 adapter->bounce_buffer = 609 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); 610 if (!adapter->bounce_buffer) 611 goto out_free_irq; 612 613 adapter->bounce_buffer_dma = 614 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, 615 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); 616 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 617 netdev_err(netdev, "unable to map bounce buffer\n"); 618 goto out_free_bounce_buffer; 619 } 620 621 netdev_dbg(netdev, "initial replenish cycle\n"); 622 ibmveth_interrupt(netdev->irq, netdev); 623 624 netif_start_queue(netdev); 625 626 netdev_dbg(netdev, "open complete\n"); 627 628 return 0; 629 630 out_free_bounce_buffer: 631 kfree(adapter->bounce_buffer); 632 out_free_irq: 633 free_irq(netdev->irq, netdev); 634 out_free_buffer_pools: 635 while (--i >= 0) { 636 if (adapter->rx_buff_pool[i].active) 637 ibmveth_free_buffer_pool(adapter, 638 &adapter->rx_buff_pool[i]); 639 } 640 out_unmap_filter_list: 641 dma_unmap_single(dev, adapter->filter_list_dma, 4096, 642 DMA_BIDIRECTIONAL); 643 out_unmap_buffer_list: 644 dma_unmap_single(dev, adapter->buffer_list_dma, 4096, 645 DMA_BIDIRECTIONAL); 646 out_free_queue_mem: 647 dma_free_coherent(dev, adapter->rx_queue.queue_len, 648 adapter->rx_queue.queue_addr, 649 adapter->rx_queue.queue_dma); 650 out_free_filter_list: 651 free_page((unsigned long)adapter->filter_list_addr); 652 out_free_buffer_list: 653 free_page((unsigned long)adapter->buffer_list_addr); 654 out: 655 napi_disable(&adapter->napi); 656 return rc; 657 } 658 659 static int ibmveth_close(struct net_device *netdev) 660 { 661 struct ibmveth_adapter *adapter = netdev_priv(netdev); 662 struct device *dev = &adapter->vdev->dev; 663 long lpar_rc; 664 int i; 665 666 netdev_dbg(netdev, "close starting\n"); 667 668 napi_disable(&adapter->napi); 669 670 if (!adapter->pool_config) 671 netif_stop_queue(netdev); 672 673 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); 674 675 do { 676 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); 677 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); 678 679 if (lpar_rc != H_SUCCESS) { 680 netdev_err(netdev, "h_free_logical_lan failed with %lx, " 681 "continuing with close\n", lpar_rc); 682 } 683 684 free_irq(netdev->irq, netdev); 685 686 ibmveth_update_rx_no_buffer(adapter); 687 688 dma_unmap_single(dev, adapter->buffer_list_dma, 4096, 689 DMA_BIDIRECTIONAL); 690 free_page((unsigned long)adapter->buffer_list_addr); 691 692 dma_unmap_single(dev, adapter->filter_list_dma, 4096, 693 DMA_BIDIRECTIONAL); 694 free_page((unsigned long)adapter->filter_list_addr); 695 696 dma_free_coherent(dev, adapter->rx_queue.queue_len, 697 adapter->rx_queue.queue_addr, 698 adapter->rx_queue.queue_dma); 699 700 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 701 if (adapter->rx_buff_pool[i].active) 702 ibmveth_free_buffer_pool(adapter, 703 &adapter->rx_buff_pool[i]); 704 705 dma_unmap_single(&adapter->vdev->dev, adapter->bounce_buffer_dma, 706 adapter->netdev->mtu + IBMVETH_BUFF_OH, 707 DMA_BIDIRECTIONAL); 708 kfree(adapter->bounce_buffer); 709 710 netdev_dbg(netdev, "close complete\n"); 711 712 return 0; 713 } 714 715 static int netdev_get_link_ksettings(struct net_device *dev, 716 struct ethtool_link_ksettings *cmd) 717 { 718 u32 supported, advertising; 719 720 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 721 SUPPORTED_FIBRE); 722 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 723 ADVERTISED_FIBRE); 724 cmd->base.speed = SPEED_1000; 725 cmd->base.duplex = DUPLEX_FULL; 726 cmd->base.port = PORT_FIBRE; 727 cmd->base.phy_address = 0; 728 cmd->base.autoneg = AUTONEG_ENABLE; 729 730 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 731 supported); 732 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 733 advertising); 734 735 return 0; 736 } 737 738 static void netdev_get_drvinfo(struct net_device *dev, 739 struct ethtool_drvinfo *info) 740 { 741 strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); 742 strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); 743 } 744 745 static netdev_features_t ibmveth_fix_features(struct net_device *dev, 746 netdev_features_t features) 747 { 748 /* 749 * Since the ibmveth firmware interface does not have the 750 * concept of separate tx/rx checksum offload enable, if rx 751 * checksum is disabled we also have to disable tx checksum 752 * offload. Once we disable rx checksum offload, we are no 753 * longer allowed to send tx buffers that are not properly 754 * checksummed. 755 */ 756 757 if (!(features & NETIF_F_RXCSUM)) 758 features &= ~NETIF_F_CSUM_MASK; 759 760 return features; 761 } 762 763 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) 764 { 765 struct ibmveth_adapter *adapter = netdev_priv(dev); 766 unsigned long set_attr, clr_attr, ret_attr; 767 unsigned long set_attr6, clr_attr6; 768 long ret, ret4, ret6; 769 int rc1 = 0, rc2 = 0; 770 int restart = 0; 771 772 if (netif_running(dev)) { 773 restart = 1; 774 adapter->pool_config = 1; 775 ibmveth_close(dev); 776 adapter->pool_config = 0; 777 } 778 779 set_attr = 0; 780 clr_attr = 0; 781 set_attr6 = 0; 782 clr_attr6 = 0; 783 784 if (data) { 785 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; 786 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; 787 } else { 788 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; 789 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; 790 } 791 792 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 793 794 if (ret == H_SUCCESS && 795 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { 796 ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, 797 set_attr, &ret_attr); 798 799 if (ret4 != H_SUCCESS) { 800 netdev_err(dev, "unable to change IPv4 checksum " 801 "offload settings. %d rc=%ld\n", 802 data, ret4); 803 804 h_illan_attributes(adapter->vdev->unit_address, 805 set_attr, clr_attr, &ret_attr); 806 807 if (data == 1) 808 dev->features &= ~NETIF_F_IP_CSUM; 809 810 } else { 811 adapter->fw_ipv4_csum_support = data; 812 } 813 814 ret6 = h_illan_attributes(adapter->vdev->unit_address, 815 clr_attr6, set_attr6, &ret_attr); 816 817 if (ret6 != H_SUCCESS) { 818 netdev_err(dev, "unable to change IPv6 checksum " 819 "offload settings. %d rc=%ld\n", 820 data, ret6); 821 822 h_illan_attributes(adapter->vdev->unit_address, 823 set_attr6, clr_attr6, &ret_attr); 824 825 if (data == 1) 826 dev->features &= ~NETIF_F_IPV6_CSUM; 827 828 } else 829 adapter->fw_ipv6_csum_support = data; 830 831 if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) 832 adapter->rx_csum = data; 833 else 834 rc1 = -EIO; 835 } else { 836 rc1 = -EIO; 837 netdev_err(dev, "unable to change checksum offload settings." 838 " %d rc=%ld ret_attr=%lx\n", data, ret, 839 ret_attr); 840 } 841 842 if (restart) 843 rc2 = ibmveth_open(dev); 844 845 return rc1 ? rc1 : rc2; 846 } 847 848 static int ibmveth_set_tso(struct net_device *dev, u32 data) 849 { 850 struct ibmveth_adapter *adapter = netdev_priv(dev); 851 unsigned long set_attr, clr_attr, ret_attr; 852 long ret1, ret2; 853 int rc1 = 0, rc2 = 0; 854 int restart = 0; 855 856 if (netif_running(dev)) { 857 restart = 1; 858 adapter->pool_config = 1; 859 ibmveth_close(dev); 860 adapter->pool_config = 0; 861 } 862 863 set_attr = 0; 864 clr_attr = 0; 865 866 if (data) 867 set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; 868 else 869 clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; 870 871 ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 872 873 if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && 874 !old_large_send) { 875 ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, 876 set_attr, &ret_attr); 877 878 if (ret2 != H_SUCCESS) { 879 netdev_err(dev, "unable to change tso settings. %d rc=%ld\n", 880 data, ret2); 881 882 h_illan_attributes(adapter->vdev->unit_address, 883 set_attr, clr_attr, &ret_attr); 884 885 if (data == 1) 886 dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 887 rc1 = -EIO; 888 889 } else { 890 adapter->fw_large_send_support = data; 891 adapter->large_send = data; 892 } 893 } else { 894 /* Older firmware version of large send offload does not 895 * support tcp6/ipv6 896 */ 897 if (data == 1) { 898 dev->features &= ~NETIF_F_TSO6; 899 netdev_info(dev, "TSO feature requires all partitions to have updated driver"); 900 } 901 adapter->large_send = data; 902 } 903 904 if (restart) 905 rc2 = ibmveth_open(dev); 906 907 return rc1 ? rc1 : rc2; 908 } 909 910 static int ibmveth_set_features(struct net_device *dev, 911 netdev_features_t features) 912 { 913 struct ibmveth_adapter *adapter = netdev_priv(dev); 914 int rx_csum = !!(features & NETIF_F_RXCSUM); 915 int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6)); 916 int rc1 = 0, rc2 = 0; 917 918 if (rx_csum != adapter->rx_csum) { 919 rc1 = ibmveth_set_csum_offload(dev, rx_csum); 920 if (rc1 && !adapter->rx_csum) 921 dev->features = 922 features & ~(NETIF_F_CSUM_MASK | 923 NETIF_F_RXCSUM); 924 } 925 926 if (large_send != adapter->large_send) { 927 rc2 = ibmveth_set_tso(dev, large_send); 928 if (rc2 && !adapter->large_send) 929 dev->features = 930 features & ~(NETIF_F_TSO | NETIF_F_TSO6); 931 } 932 933 return rc1 ? rc1 : rc2; 934 } 935 936 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) 937 { 938 int i; 939 940 if (stringset != ETH_SS_STATS) 941 return; 942 943 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) 944 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); 945 } 946 947 static int ibmveth_get_sset_count(struct net_device *dev, int sset) 948 { 949 switch (sset) { 950 case ETH_SS_STATS: 951 return ARRAY_SIZE(ibmveth_stats); 952 default: 953 return -EOPNOTSUPP; 954 } 955 } 956 957 static void ibmveth_get_ethtool_stats(struct net_device *dev, 958 struct ethtool_stats *stats, u64 *data) 959 { 960 int i; 961 struct ibmveth_adapter *adapter = netdev_priv(dev); 962 963 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) 964 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); 965 } 966 967 static const struct ethtool_ops netdev_ethtool_ops = { 968 .get_drvinfo = netdev_get_drvinfo, 969 .get_link = ethtool_op_get_link, 970 .get_strings = ibmveth_get_strings, 971 .get_sset_count = ibmveth_get_sset_count, 972 .get_ethtool_stats = ibmveth_get_ethtool_stats, 973 .get_link_ksettings = netdev_get_link_ksettings, 974 }; 975 976 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 977 { 978 return -EOPNOTSUPP; 979 } 980 981 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) 982 983 static int ibmveth_send(struct ibmveth_adapter *adapter, 984 union ibmveth_buf_desc *descs, unsigned long mss) 985 { 986 unsigned long correlator; 987 unsigned int retry_count; 988 unsigned long ret; 989 990 /* 991 * The retry count sets a maximum for the number of broadcast and 992 * multicast destinations within the system. 993 */ 994 retry_count = 1024; 995 correlator = 0; 996 do { 997 ret = h_send_logical_lan(adapter->vdev->unit_address, 998 descs[0].desc, descs[1].desc, 999 descs[2].desc, descs[3].desc, 1000 descs[4].desc, descs[5].desc, 1001 correlator, &correlator, mss, 1002 adapter->fw_large_send_support); 1003 } while ((ret == H_BUSY) && (retry_count--)); 1004 1005 if (ret != H_SUCCESS && ret != H_DROPPED) { 1006 netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " 1007 "with rc=%ld\n", ret); 1008 return 1; 1009 } 1010 1011 return 0; 1012 } 1013 1014 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, 1015 struct net_device *netdev) 1016 { 1017 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1018 unsigned int desc_flags; 1019 union ibmveth_buf_desc descs[6]; 1020 int last, i; 1021 int force_bounce = 0; 1022 dma_addr_t dma_addr; 1023 unsigned long mss = 0; 1024 1025 /* veth doesn't handle frag_list, so linearize the skb. 1026 * When GRO is enabled SKB's can have frag_list. 1027 */ 1028 if (adapter->is_active_trunk && 1029 skb_has_frag_list(skb) && __skb_linearize(skb)) { 1030 netdev->stats.tx_dropped++; 1031 goto out; 1032 } 1033 1034 /* 1035 * veth handles a maximum of 6 segments including the header, so 1036 * we have to linearize the skb if there are more than this. 1037 */ 1038 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { 1039 netdev->stats.tx_dropped++; 1040 goto out; 1041 } 1042 1043 /* veth can't checksum offload UDP */ 1044 if (skb->ip_summed == CHECKSUM_PARTIAL && 1045 ((skb->protocol == htons(ETH_P_IP) && 1046 ip_hdr(skb)->protocol != IPPROTO_TCP) || 1047 (skb->protocol == htons(ETH_P_IPV6) && 1048 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && 1049 skb_checksum_help(skb)) { 1050 1051 netdev_err(netdev, "tx: failed to checksum packet\n"); 1052 netdev->stats.tx_dropped++; 1053 goto out; 1054 } 1055 1056 desc_flags = IBMVETH_BUF_VALID; 1057 1058 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1059 unsigned char *buf = skb_transport_header(skb) + 1060 skb->csum_offset; 1061 1062 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); 1063 1064 /* Need to zero out the checksum */ 1065 buf[0] = 0; 1066 buf[1] = 0; 1067 1068 if (skb_is_gso(skb) && adapter->fw_large_send_support) 1069 desc_flags |= IBMVETH_BUF_LRG_SND; 1070 } 1071 1072 retry_bounce: 1073 memset(descs, 0, sizeof(descs)); 1074 1075 /* 1076 * If a linear packet is below the rx threshold then 1077 * copy it into the static bounce buffer. This avoids the 1078 * cost of a TCE insert and remove. 1079 */ 1080 if (force_bounce || (!skb_is_nonlinear(skb) && 1081 (skb->len < tx_copybreak))) { 1082 skb_copy_from_linear_data(skb, adapter->bounce_buffer, 1083 skb->len); 1084 1085 descs[0].fields.flags_len = desc_flags | skb->len; 1086 descs[0].fields.address = adapter->bounce_buffer_dma; 1087 1088 if (ibmveth_send(adapter, descs, 0)) { 1089 adapter->tx_send_failed++; 1090 netdev->stats.tx_dropped++; 1091 } else { 1092 netdev->stats.tx_packets++; 1093 netdev->stats.tx_bytes += skb->len; 1094 } 1095 1096 goto out; 1097 } 1098 1099 /* Map the header */ 1100 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, 1101 skb_headlen(skb), DMA_TO_DEVICE); 1102 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 1103 goto map_failed; 1104 1105 descs[0].fields.flags_len = desc_flags | skb_headlen(skb); 1106 descs[0].fields.address = dma_addr; 1107 1108 /* Map the frags */ 1109 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1110 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1111 1112 dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, 1113 skb_frag_size(frag), DMA_TO_DEVICE); 1114 1115 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 1116 goto map_failed_frags; 1117 1118 descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); 1119 descs[i+1].fields.address = dma_addr; 1120 } 1121 1122 if (skb->ip_summed == CHECKSUM_PARTIAL && skb_is_gso(skb)) { 1123 if (adapter->fw_large_send_support) { 1124 mss = (unsigned long)skb_shinfo(skb)->gso_size; 1125 adapter->tx_large_packets++; 1126 } else if (!skb_is_gso_v6(skb)) { 1127 /* Put -1 in the IP checksum to tell phyp it 1128 * is a largesend packet. Put the mss in 1129 * the TCP checksum. 1130 */ 1131 ip_hdr(skb)->check = 0xffff; 1132 tcp_hdr(skb)->check = 1133 cpu_to_be16(skb_shinfo(skb)->gso_size); 1134 adapter->tx_large_packets++; 1135 } 1136 } 1137 1138 if (ibmveth_send(adapter, descs, mss)) { 1139 adapter->tx_send_failed++; 1140 netdev->stats.tx_dropped++; 1141 } else { 1142 netdev->stats.tx_packets++; 1143 netdev->stats.tx_bytes += skb->len; 1144 } 1145 1146 dma_unmap_single(&adapter->vdev->dev, 1147 descs[0].fields.address, 1148 descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1149 DMA_TO_DEVICE); 1150 1151 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) 1152 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, 1153 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1154 DMA_TO_DEVICE); 1155 1156 out: 1157 dev_consume_skb_any(skb); 1158 return NETDEV_TX_OK; 1159 1160 map_failed_frags: 1161 last = i+1; 1162 for (i = 1; i < last; i++) 1163 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, 1164 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1165 DMA_TO_DEVICE); 1166 1167 dma_unmap_single(&adapter->vdev->dev, 1168 descs[0].fields.address, 1169 descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1170 DMA_TO_DEVICE); 1171 map_failed: 1172 if (!firmware_has_feature(FW_FEATURE_CMO)) 1173 netdev_err(netdev, "tx: unable to map xmit buffer\n"); 1174 adapter->tx_map_failed++; 1175 if (skb_linearize(skb)) { 1176 netdev->stats.tx_dropped++; 1177 goto out; 1178 } 1179 force_bounce = 1; 1180 goto retry_bounce; 1181 } 1182 1183 static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt) 1184 { 1185 struct tcphdr *tcph; 1186 int offset = 0; 1187 int hdr_len; 1188 1189 /* only TCP packets will be aggregated */ 1190 if (skb->protocol == htons(ETH_P_IP)) { 1191 struct iphdr *iph = (struct iphdr *)skb->data; 1192 1193 if (iph->protocol == IPPROTO_TCP) { 1194 offset = iph->ihl * 4; 1195 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1196 } else { 1197 return; 1198 } 1199 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1200 struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data; 1201 1202 if (iph6->nexthdr == IPPROTO_TCP) { 1203 offset = sizeof(struct ipv6hdr); 1204 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1205 } else { 1206 return; 1207 } 1208 } else { 1209 return; 1210 } 1211 /* if mss is not set through Large Packet bit/mss in rx buffer, 1212 * expect that the mss will be written to the tcp header checksum. 1213 */ 1214 tcph = (struct tcphdr *)(skb->data + offset); 1215 if (lrg_pkt) { 1216 skb_shinfo(skb)->gso_size = mss; 1217 } else if (offset) { 1218 skb_shinfo(skb)->gso_size = ntohs(tcph->check); 1219 tcph->check = 0; 1220 } 1221 1222 if (skb_shinfo(skb)->gso_size) { 1223 hdr_len = offset + tcph->doff * 4; 1224 skb_shinfo(skb)->gso_segs = 1225 DIV_ROUND_UP(skb->len - hdr_len, 1226 skb_shinfo(skb)->gso_size); 1227 } 1228 } 1229 1230 static void ibmveth_rx_csum_helper(struct sk_buff *skb, 1231 struct ibmveth_adapter *adapter) 1232 { 1233 struct iphdr *iph = NULL; 1234 struct ipv6hdr *iph6 = NULL; 1235 __be16 skb_proto = 0; 1236 u16 iphlen = 0; 1237 u16 iph_proto = 0; 1238 u16 tcphdrlen = 0; 1239 1240 skb_proto = be16_to_cpu(skb->protocol); 1241 1242 if (skb_proto == ETH_P_IP) { 1243 iph = (struct iphdr *)skb->data; 1244 1245 /* If the IP checksum is not offloaded and if the packet 1246 * is large send, the checksum must be rebuilt. 1247 */ 1248 if (iph->check == 0xffff) { 1249 iph->check = 0; 1250 iph->check = ip_fast_csum((unsigned char *)iph, 1251 iph->ihl); 1252 } 1253 1254 iphlen = iph->ihl * 4; 1255 iph_proto = iph->protocol; 1256 } else if (skb_proto == ETH_P_IPV6) { 1257 iph6 = (struct ipv6hdr *)skb->data; 1258 iphlen = sizeof(struct ipv6hdr); 1259 iph_proto = iph6->nexthdr; 1260 } 1261 1262 /* In OVS environment, when a flow is not cached, specifically for a 1263 * new TCP connection, the first packet information is passed up 1264 * the user space for finding a flow. During this process, OVS computes 1265 * checksum on the first packet when CHECKSUM_PARTIAL flag is set. 1266 * 1267 * Given that we zeroed out TCP checksum field in transmit path 1268 * (refer ibmveth_start_xmit routine) as we set "no checksum bit", 1269 * OVS computed checksum will be incorrect w/o TCP pseudo checksum 1270 * in the packet. This leads to OVS dropping the packet and hence 1271 * TCP retransmissions are seen. 1272 * 1273 * So, re-compute TCP pseudo header checksum. 1274 */ 1275 if (iph_proto == IPPROTO_TCP && adapter->is_active_trunk) { 1276 struct tcphdr *tcph = (struct tcphdr *)(skb->data + iphlen); 1277 1278 tcphdrlen = skb->len - iphlen; 1279 1280 /* Recompute TCP pseudo header checksum */ 1281 if (skb_proto == ETH_P_IP) 1282 tcph->check = ~csum_tcpudp_magic(iph->saddr, 1283 iph->daddr, tcphdrlen, iph_proto, 0); 1284 else if (skb_proto == ETH_P_IPV6) 1285 tcph->check = ~csum_ipv6_magic(&iph6->saddr, 1286 &iph6->daddr, tcphdrlen, iph_proto, 0); 1287 1288 /* Setup SKB fields for checksum offload */ 1289 skb_partial_csum_set(skb, iphlen, 1290 offsetof(struct tcphdr, check)); 1291 skb_reset_network_header(skb); 1292 } 1293 } 1294 1295 static int ibmveth_poll(struct napi_struct *napi, int budget) 1296 { 1297 struct ibmveth_adapter *adapter = 1298 container_of(napi, struct ibmveth_adapter, napi); 1299 struct net_device *netdev = adapter->netdev; 1300 int frames_processed = 0; 1301 unsigned long lpar_rc; 1302 u16 mss = 0; 1303 1304 while (frames_processed < budget) { 1305 if (!ibmveth_rxq_pending_buffer(adapter)) 1306 break; 1307 1308 smp_rmb(); 1309 if (!ibmveth_rxq_buffer_valid(adapter)) { 1310 wmb(); /* suggested by larson1 */ 1311 adapter->rx_invalid_buffer++; 1312 netdev_dbg(netdev, "recycling invalid buffer\n"); 1313 ibmveth_rxq_recycle_buffer(adapter); 1314 } else { 1315 struct sk_buff *skb, *new_skb; 1316 int length = ibmveth_rxq_frame_length(adapter); 1317 int offset = ibmveth_rxq_frame_offset(adapter); 1318 int csum_good = ibmveth_rxq_csum_good(adapter); 1319 int lrg_pkt = ibmveth_rxq_large_packet(adapter); 1320 1321 skb = ibmveth_rxq_get_buffer(adapter); 1322 1323 /* if the large packet bit is set in the rx queue 1324 * descriptor, the mss will be written by PHYP eight 1325 * bytes from the start of the rx buffer, which is 1326 * skb->data at this stage 1327 */ 1328 if (lrg_pkt) { 1329 __be64 *rxmss = (__be64 *)(skb->data + 8); 1330 1331 mss = (u16)be64_to_cpu(*rxmss); 1332 } 1333 1334 new_skb = NULL; 1335 if (length < rx_copybreak) 1336 new_skb = netdev_alloc_skb(netdev, length); 1337 1338 if (new_skb) { 1339 skb_copy_to_linear_data(new_skb, 1340 skb->data + offset, 1341 length); 1342 if (rx_flush) 1343 ibmveth_flush_buffer(skb->data, 1344 length + offset); 1345 if (!ibmveth_rxq_recycle_buffer(adapter)) 1346 kfree_skb(skb); 1347 skb = new_skb; 1348 } else { 1349 ibmveth_rxq_harvest_buffer(adapter); 1350 skb_reserve(skb, offset); 1351 } 1352 1353 skb_put(skb, length); 1354 skb->protocol = eth_type_trans(skb, netdev); 1355 1356 if (csum_good) { 1357 skb->ip_summed = CHECKSUM_UNNECESSARY; 1358 ibmveth_rx_csum_helper(skb, adapter); 1359 } 1360 1361 if (length > netdev->mtu + ETH_HLEN) { 1362 ibmveth_rx_mss_helper(skb, mss, lrg_pkt); 1363 adapter->rx_large_packets++; 1364 } 1365 1366 napi_gro_receive(napi, skb); /* send it up */ 1367 1368 netdev->stats.rx_packets++; 1369 netdev->stats.rx_bytes += length; 1370 frames_processed++; 1371 } 1372 } 1373 1374 ibmveth_replenish_task(adapter); 1375 1376 if (frames_processed < budget) { 1377 napi_complete_done(napi, frames_processed); 1378 1379 /* We think we are done - reenable interrupts, 1380 * then check once more to make sure we are done. 1381 */ 1382 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1383 VIO_IRQ_ENABLE); 1384 1385 BUG_ON(lpar_rc != H_SUCCESS); 1386 1387 if (ibmveth_rxq_pending_buffer(adapter) && 1388 napi_reschedule(napi)) { 1389 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1390 VIO_IRQ_DISABLE); 1391 } 1392 } 1393 1394 return frames_processed; 1395 } 1396 1397 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) 1398 { 1399 struct net_device *netdev = dev_instance; 1400 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1401 unsigned long lpar_rc; 1402 1403 if (napi_schedule_prep(&adapter->napi)) { 1404 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1405 VIO_IRQ_DISABLE); 1406 BUG_ON(lpar_rc != H_SUCCESS); 1407 __napi_schedule(&adapter->napi); 1408 } 1409 return IRQ_HANDLED; 1410 } 1411 1412 static void ibmveth_set_multicast_list(struct net_device *netdev) 1413 { 1414 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1415 unsigned long lpar_rc; 1416 1417 if ((netdev->flags & IFF_PROMISC) || 1418 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { 1419 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1420 IbmVethMcastEnableRecv | 1421 IbmVethMcastDisableFiltering, 1422 0); 1423 if (lpar_rc != H_SUCCESS) { 1424 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1425 "entering promisc mode\n", lpar_rc); 1426 } 1427 } else { 1428 struct netdev_hw_addr *ha; 1429 /* clear the filter table & disable filtering */ 1430 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1431 IbmVethMcastEnableRecv | 1432 IbmVethMcastDisableFiltering | 1433 IbmVethMcastClearFilterTable, 1434 0); 1435 if (lpar_rc != H_SUCCESS) { 1436 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1437 "attempting to clear filter table\n", 1438 lpar_rc); 1439 } 1440 /* add the addresses to the filter table */ 1441 netdev_for_each_mc_addr(ha, netdev) { 1442 /* add the multicast address to the filter table */ 1443 u64 mcast_addr; 1444 mcast_addr = ibmveth_encode_mac_addr(ha->addr); 1445 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1446 IbmVethMcastAddFilter, 1447 mcast_addr); 1448 if (lpar_rc != H_SUCCESS) { 1449 netdev_err(netdev, "h_multicast_ctrl rc=%ld " 1450 "when adding an entry to the filter " 1451 "table\n", lpar_rc); 1452 } 1453 } 1454 1455 /* re-enable filtering */ 1456 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1457 IbmVethMcastEnableFiltering, 1458 0); 1459 if (lpar_rc != H_SUCCESS) { 1460 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1461 "enabling filtering\n", lpar_rc); 1462 } 1463 } 1464 } 1465 1466 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) 1467 { 1468 struct ibmveth_adapter *adapter = netdev_priv(dev); 1469 struct vio_dev *viodev = adapter->vdev; 1470 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; 1471 int i, rc; 1472 int need_restart = 0; 1473 1474 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 1475 if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) 1476 break; 1477 1478 if (i == IBMVETH_NUM_BUFF_POOLS) 1479 return -EINVAL; 1480 1481 /* Deactivate all the buffer pools so that the next loop can activate 1482 only the buffer pools necessary to hold the new MTU */ 1483 if (netif_running(adapter->netdev)) { 1484 need_restart = 1; 1485 adapter->pool_config = 1; 1486 ibmveth_close(adapter->netdev); 1487 adapter->pool_config = 0; 1488 } 1489 1490 /* Look for an active buffer pool that can hold the new MTU */ 1491 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1492 adapter->rx_buff_pool[i].active = 1; 1493 1494 if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) { 1495 dev->mtu = new_mtu; 1496 vio_cmo_set_dev_desired(viodev, 1497 ibmveth_get_desired_dma 1498 (viodev)); 1499 if (need_restart) { 1500 return ibmveth_open(adapter->netdev); 1501 } 1502 return 0; 1503 } 1504 } 1505 1506 if (need_restart && (rc = ibmveth_open(adapter->netdev))) 1507 return rc; 1508 1509 return -EINVAL; 1510 } 1511 1512 #ifdef CONFIG_NET_POLL_CONTROLLER 1513 static void ibmveth_poll_controller(struct net_device *dev) 1514 { 1515 ibmveth_replenish_task(netdev_priv(dev)); 1516 ibmveth_interrupt(dev->irq, dev); 1517 } 1518 #endif 1519 1520 /** 1521 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver 1522 * 1523 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned 1524 * 1525 * Return value: 1526 * Number of bytes of IO data the driver will need to perform well. 1527 */ 1528 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) 1529 { 1530 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 1531 struct ibmveth_adapter *adapter; 1532 struct iommu_table *tbl; 1533 unsigned long ret; 1534 int i; 1535 int rxqentries = 1; 1536 1537 tbl = get_iommu_table_base(&vdev->dev); 1538 1539 /* netdev inits at probe time along with the structures we need below*/ 1540 if (netdev == NULL) 1541 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); 1542 1543 adapter = netdev_priv(netdev); 1544 1545 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; 1546 ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); 1547 1548 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1549 /* add the size of the active receive buffers */ 1550 if (adapter->rx_buff_pool[i].active) 1551 ret += 1552 adapter->rx_buff_pool[i].size * 1553 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. 1554 buff_size, tbl); 1555 rxqentries += adapter->rx_buff_pool[i].size; 1556 } 1557 /* add the size of the receive queue entries */ 1558 ret += IOMMU_PAGE_ALIGN( 1559 rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); 1560 1561 return ret; 1562 } 1563 1564 static int ibmveth_set_mac_addr(struct net_device *dev, void *p) 1565 { 1566 struct ibmveth_adapter *adapter = netdev_priv(dev); 1567 struct sockaddr *addr = p; 1568 u64 mac_address; 1569 int rc; 1570 1571 if (!is_valid_ether_addr(addr->sa_data)) 1572 return -EADDRNOTAVAIL; 1573 1574 mac_address = ibmveth_encode_mac_addr(addr->sa_data); 1575 rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address); 1576 if (rc) { 1577 netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc); 1578 return rc; 1579 } 1580 1581 ether_addr_copy(dev->dev_addr, addr->sa_data); 1582 1583 return 0; 1584 } 1585 1586 static const struct net_device_ops ibmveth_netdev_ops = { 1587 .ndo_open = ibmveth_open, 1588 .ndo_stop = ibmveth_close, 1589 .ndo_start_xmit = ibmveth_start_xmit, 1590 .ndo_set_rx_mode = ibmveth_set_multicast_list, 1591 .ndo_do_ioctl = ibmveth_ioctl, 1592 .ndo_change_mtu = ibmveth_change_mtu, 1593 .ndo_fix_features = ibmveth_fix_features, 1594 .ndo_set_features = ibmveth_set_features, 1595 .ndo_validate_addr = eth_validate_addr, 1596 .ndo_set_mac_address = ibmveth_set_mac_addr, 1597 #ifdef CONFIG_NET_POLL_CONTROLLER 1598 .ndo_poll_controller = ibmveth_poll_controller, 1599 #endif 1600 }; 1601 1602 static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) 1603 { 1604 int rc, i, mac_len; 1605 struct net_device *netdev; 1606 struct ibmveth_adapter *adapter; 1607 unsigned char *mac_addr_p; 1608 __be32 *mcastFilterSize_p; 1609 long ret; 1610 unsigned long ret_attr; 1611 1612 dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", 1613 dev->unit_address); 1614 1615 mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, 1616 &mac_len); 1617 if (!mac_addr_p) { 1618 dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); 1619 return -EINVAL; 1620 } 1621 /* Workaround for old/broken pHyp */ 1622 if (mac_len == 8) 1623 mac_addr_p += 2; 1624 else if (mac_len != 6) { 1625 dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", 1626 mac_len); 1627 return -EINVAL; 1628 } 1629 1630 mcastFilterSize_p = (__be32 *)vio_get_attribute(dev, 1631 VETH_MCAST_FILTER_SIZE, 1632 NULL); 1633 if (!mcastFilterSize_p) { 1634 dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " 1635 "attribute\n"); 1636 return -EINVAL; 1637 } 1638 1639 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); 1640 1641 if (!netdev) 1642 return -ENOMEM; 1643 1644 adapter = netdev_priv(netdev); 1645 dev_set_drvdata(&dev->dev, netdev); 1646 1647 adapter->vdev = dev; 1648 adapter->netdev = netdev; 1649 adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p); 1650 adapter->pool_config = 0; 1651 1652 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); 1653 1654 netdev->irq = dev->irq; 1655 netdev->netdev_ops = &ibmveth_netdev_ops; 1656 netdev->ethtool_ops = &netdev_ethtool_ops; 1657 SET_NETDEV_DEV(netdev, &dev->dev); 1658 netdev->hw_features = NETIF_F_SG; 1659 if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) { 1660 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1661 NETIF_F_RXCSUM; 1662 } 1663 1664 netdev->features |= netdev->hw_features; 1665 1666 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 1667 1668 /* If running older firmware, TSO should not be enabled by default */ 1669 if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && 1670 !old_large_send) { 1671 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 1672 netdev->features |= netdev->hw_features; 1673 } else { 1674 netdev->hw_features |= NETIF_F_TSO; 1675 } 1676 1677 adapter->is_active_trunk = false; 1678 if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK)) { 1679 adapter->is_active_trunk = true; 1680 netdev->hw_features |= NETIF_F_FRAGLIST; 1681 netdev->features |= NETIF_F_FRAGLIST; 1682 } 1683 1684 netdev->min_mtu = IBMVETH_MIN_MTU; 1685 netdev->max_mtu = ETH_MAX_MTU; 1686 1687 memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); 1688 1689 if (firmware_has_feature(FW_FEATURE_CMO)) 1690 memcpy(pool_count, pool_count_cmo, sizeof(pool_count)); 1691 1692 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1693 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; 1694 int error; 1695 1696 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, 1697 pool_count[i], pool_size[i], 1698 pool_active[i]); 1699 error = kobject_init_and_add(kobj, &ktype_veth_pool, 1700 &dev->dev.kobj, "pool%d", i); 1701 if (!error) 1702 kobject_uevent(kobj, KOBJ_ADD); 1703 } 1704 1705 netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); 1706 netdev_dbg(netdev, "registering netdev...\n"); 1707 1708 ibmveth_set_features(netdev, netdev->features); 1709 1710 rc = register_netdev(netdev); 1711 1712 if (rc) { 1713 netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); 1714 free_netdev(netdev); 1715 return rc; 1716 } 1717 1718 netdev_dbg(netdev, "registered\n"); 1719 1720 return 0; 1721 } 1722 1723 static int ibmveth_remove(struct vio_dev *dev) 1724 { 1725 struct net_device *netdev = dev_get_drvdata(&dev->dev); 1726 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1727 int i; 1728 1729 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 1730 kobject_put(&adapter->rx_buff_pool[i].kobj); 1731 1732 unregister_netdev(netdev); 1733 1734 free_netdev(netdev); 1735 dev_set_drvdata(&dev->dev, NULL); 1736 1737 return 0; 1738 } 1739 1740 static struct attribute veth_active_attr; 1741 static struct attribute veth_num_attr; 1742 static struct attribute veth_size_attr; 1743 1744 static ssize_t veth_pool_show(struct kobject *kobj, 1745 struct attribute *attr, char *buf) 1746 { 1747 struct ibmveth_buff_pool *pool = container_of(kobj, 1748 struct ibmveth_buff_pool, 1749 kobj); 1750 1751 if (attr == &veth_active_attr) 1752 return sprintf(buf, "%d\n", pool->active); 1753 else if (attr == &veth_num_attr) 1754 return sprintf(buf, "%d\n", pool->size); 1755 else if (attr == &veth_size_attr) 1756 return sprintf(buf, "%d\n", pool->buff_size); 1757 return 0; 1758 } 1759 1760 static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, 1761 const char *buf, size_t count) 1762 { 1763 struct ibmveth_buff_pool *pool = container_of(kobj, 1764 struct ibmveth_buff_pool, 1765 kobj); 1766 struct net_device *netdev = dev_get_drvdata( 1767 container_of(kobj->parent, struct device, kobj)); 1768 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1769 long value = simple_strtol(buf, NULL, 10); 1770 long rc; 1771 1772 if (attr == &veth_active_attr) { 1773 if (value && !pool->active) { 1774 if (netif_running(netdev)) { 1775 if (ibmveth_alloc_buffer_pool(pool)) { 1776 netdev_err(netdev, 1777 "unable to alloc pool\n"); 1778 return -ENOMEM; 1779 } 1780 pool->active = 1; 1781 adapter->pool_config = 1; 1782 ibmveth_close(netdev); 1783 adapter->pool_config = 0; 1784 if ((rc = ibmveth_open(netdev))) 1785 return rc; 1786 } else { 1787 pool->active = 1; 1788 } 1789 } else if (!value && pool->active) { 1790 int mtu = netdev->mtu + IBMVETH_BUFF_OH; 1791 int i; 1792 /* Make sure there is a buffer pool with buffers that 1793 can hold a packet of the size of the MTU */ 1794 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1795 if (pool == &adapter->rx_buff_pool[i]) 1796 continue; 1797 if (!adapter->rx_buff_pool[i].active) 1798 continue; 1799 if (mtu <= adapter->rx_buff_pool[i].buff_size) 1800 break; 1801 } 1802 1803 if (i == IBMVETH_NUM_BUFF_POOLS) { 1804 netdev_err(netdev, "no active pool >= MTU\n"); 1805 return -EPERM; 1806 } 1807 1808 if (netif_running(netdev)) { 1809 adapter->pool_config = 1; 1810 ibmveth_close(netdev); 1811 pool->active = 0; 1812 adapter->pool_config = 0; 1813 if ((rc = ibmveth_open(netdev))) 1814 return rc; 1815 } 1816 pool->active = 0; 1817 } 1818 } else if (attr == &veth_num_attr) { 1819 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { 1820 return -EINVAL; 1821 } else { 1822 if (netif_running(netdev)) { 1823 adapter->pool_config = 1; 1824 ibmveth_close(netdev); 1825 adapter->pool_config = 0; 1826 pool->size = value; 1827 if ((rc = ibmveth_open(netdev))) 1828 return rc; 1829 } else { 1830 pool->size = value; 1831 } 1832 } 1833 } else if (attr == &veth_size_attr) { 1834 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { 1835 return -EINVAL; 1836 } else { 1837 if (netif_running(netdev)) { 1838 adapter->pool_config = 1; 1839 ibmveth_close(netdev); 1840 adapter->pool_config = 0; 1841 pool->buff_size = value; 1842 if ((rc = ibmveth_open(netdev))) 1843 return rc; 1844 } else { 1845 pool->buff_size = value; 1846 } 1847 } 1848 } 1849 1850 /* kick the interrupt handler to allocate/deallocate pools */ 1851 ibmveth_interrupt(netdev->irq, netdev); 1852 return count; 1853 } 1854 1855 1856 #define ATTR(_name, _mode) \ 1857 struct attribute veth_##_name##_attr = { \ 1858 .name = __stringify(_name), .mode = _mode, \ 1859 }; 1860 1861 static ATTR(active, 0644); 1862 static ATTR(num, 0644); 1863 static ATTR(size, 0644); 1864 1865 static struct attribute *veth_pool_attrs[] = { 1866 &veth_active_attr, 1867 &veth_num_attr, 1868 &veth_size_attr, 1869 NULL, 1870 }; 1871 1872 static const struct sysfs_ops veth_pool_ops = { 1873 .show = veth_pool_show, 1874 .store = veth_pool_store, 1875 }; 1876 1877 static struct kobj_type ktype_veth_pool = { 1878 .release = NULL, 1879 .sysfs_ops = &veth_pool_ops, 1880 .default_attrs = veth_pool_attrs, 1881 }; 1882 1883 static int ibmveth_resume(struct device *dev) 1884 { 1885 struct net_device *netdev = dev_get_drvdata(dev); 1886 ibmveth_interrupt(netdev->irq, netdev); 1887 return 0; 1888 } 1889 1890 static const struct vio_device_id ibmveth_device_table[] = { 1891 { "network", "IBM,l-lan"}, 1892 { "", "" } 1893 }; 1894 MODULE_DEVICE_TABLE(vio, ibmveth_device_table); 1895 1896 static const struct dev_pm_ops ibmveth_pm_ops = { 1897 .resume = ibmveth_resume 1898 }; 1899 1900 static struct vio_driver ibmveth_driver = { 1901 .id_table = ibmveth_device_table, 1902 .probe = ibmveth_probe, 1903 .remove = ibmveth_remove, 1904 .get_desired_dma = ibmveth_get_desired_dma, 1905 .name = ibmveth_driver_name, 1906 .pm = &ibmveth_pm_ops, 1907 }; 1908 1909 static int __init ibmveth_module_init(void) 1910 { 1911 printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, 1912 ibmveth_driver_string, ibmveth_driver_version); 1913 1914 return vio_register_driver(&ibmveth_driver); 1915 } 1916 1917 static void __exit ibmveth_module_exit(void) 1918 { 1919 vio_unregister_driver(&ibmveth_driver); 1920 } 1921 1922 module_init(ibmveth_module_init); 1923 module_exit(ibmveth_module_exit); 1924