1 /* 2 * IBM Power Virtual Ethernet Device Driver 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 * 17 * Copyright (C) IBM Corporation, 2003, 2010 18 * 19 * Authors: Dave Larson <larson1@us.ibm.com> 20 * Santiago Leon <santil@linux.vnet.ibm.com> 21 * Brian King <brking@linux.vnet.ibm.com> 22 * Robert Jennings <rcj@linux.vnet.ibm.com> 23 * Anton Blanchard <anton@au.ibm.com> 24 */ 25 26 #include <linux/module.h> 27 #include <linux/moduleparam.h> 28 #include <linux/types.h> 29 #include <linux/errno.h> 30 #include <linux/dma-mapping.h> 31 #include <linux/kernel.h> 32 #include <linux/netdevice.h> 33 #include <linux/etherdevice.h> 34 #include <linux/skbuff.h> 35 #include <linux/init.h> 36 #include <linux/interrupt.h> 37 #include <linux/mm.h> 38 #include <linux/pm.h> 39 #include <linux/ethtool.h> 40 #include <linux/in.h> 41 #include <linux/ip.h> 42 #include <linux/ipv6.h> 43 #include <linux/slab.h> 44 #include <asm/hvcall.h> 45 #include <linux/atomic.h> 46 #include <asm/vio.h> 47 #include <asm/iommu.h> 48 #include <asm/firmware.h> 49 #include <net/tcp.h> 50 #include <net/ip6_checksum.h> 51 52 #include "ibmveth.h" 53 54 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); 55 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); 56 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); 57 58 static struct kobj_type ktype_veth_pool; 59 60 61 static const char ibmveth_driver_name[] = "ibmveth"; 62 static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; 63 #define ibmveth_driver_version "1.06" 64 65 MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); 66 MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); 67 MODULE_LICENSE("GPL"); 68 MODULE_VERSION(ibmveth_driver_version); 69 70 static unsigned int tx_copybreak __read_mostly = 128; 71 module_param(tx_copybreak, uint, 0644); 72 MODULE_PARM_DESC(tx_copybreak, 73 "Maximum size of packet that is copied to a new buffer on transmit"); 74 75 static unsigned int rx_copybreak __read_mostly = 128; 76 module_param(rx_copybreak, uint, 0644); 77 MODULE_PARM_DESC(rx_copybreak, 78 "Maximum size of packet that is copied to a new buffer on receive"); 79 80 static unsigned int rx_flush __read_mostly = 0; 81 module_param(rx_flush, uint, 0644); 82 MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); 83 84 static bool old_large_send __read_mostly; 85 module_param(old_large_send, bool, 0444); 86 MODULE_PARM_DESC(old_large_send, 87 "Use old large send method on firmware that supports the new method"); 88 89 struct ibmveth_stat { 90 char name[ETH_GSTRING_LEN]; 91 int offset; 92 }; 93 94 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) 95 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) 96 97 struct ibmveth_stat ibmveth_stats[] = { 98 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, 99 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, 100 { "replenish_add_buff_failure", 101 IBMVETH_STAT_OFF(replenish_add_buff_failure) }, 102 { "replenish_add_buff_success", 103 IBMVETH_STAT_OFF(replenish_add_buff_success) }, 104 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, 105 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, 106 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, 107 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, 108 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, 109 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, 110 { "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) }, 111 { "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) }, 112 { "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) } 113 }; 114 115 /* simple methods of getting data from the current rxq entry */ 116 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) 117 { 118 return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); 119 } 120 121 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) 122 { 123 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> 124 IBMVETH_RXQ_TOGGLE_SHIFT; 125 } 126 127 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) 128 { 129 return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; 130 } 131 132 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) 133 { 134 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; 135 } 136 137 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) 138 { 139 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; 140 } 141 142 static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter) 143 { 144 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT; 145 } 146 147 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) 148 { 149 return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); 150 } 151 152 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) 153 { 154 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; 155 } 156 157 /* setup the initial settings for a buffer pool */ 158 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, 159 u32 pool_index, u32 pool_size, 160 u32 buff_size, u32 pool_active) 161 { 162 pool->size = pool_size; 163 pool->index = pool_index; 164 pool->buff_size = buff_size; 165 pool->threshold = pool_size * 7 / 8; 166 pool->active = pool_active; 167 } 168 169 /* allocate and setup an buffer pool - called during open */ 170 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) 171 { 172 int i; 173 174 pool->free_map = kmalloc_array(pool->size, sizeof(u16), GFP_KERNEL); 175 176 if (!pool->free_map) 177 return -1; 178 179 pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL); 180 if (!pool->dma_addr) { 181 kfree(pool->free_map); 182 pool->free_map = NULL; 183 return -1; 184 } 185 186 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); 187 188 if (!pool->skbuff) { 189 kfree(pool->dma_addr); 190 pool->dma_addr = NULL; 191 192 kfree(pool->free_map); 193 pool->free_map = NULL; 194 return -1; 195 } 196 197 for (i = 0; i < pool->size; ++i) 198 pool->free_map[i] = i; 199 200 atomic_set(&pool->available, 0); 201 pool->producer_index = 0; 202 pool->consumer_index = 0; 203 204 return 0; 205 } 206 207 static inline void ibmveth_flush_buffer(void *addr, unsigned long length) 208 { 209 unsigned long offset; 210 211 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) 212 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); 213 } 214 215 /* replenish the buffers for a pool. note that we don't need to 216 * skb_reserve these since they are used for incoming... 217 */ 218 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, 219 struct ibmveth_buff_pool *pool) 220 { 221 u32 i; 222 u32 count = pool->size - atomic_read(&pool->available); 223 u32 buffers_added = 0; 224 struct sk_buff *skb; 225 unsigned int free_index, index; 226 u64 correlator; 227 unsigned long lpar_rc; 228 dma_addr_t dma_addr; 229 230 mb(); 231 232 for (i = 0; i < count; ++i) { 233 union ibmveth_buf_desc desc; 234 235 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 236 237 if (!skb) { 238 netdev_dbg(adapter->netdev, 239 "replenish: unable to allocate skb\n"); 240 adapter->replenish_no_mem++; 241 break; 242 } 243 244 free_index = pool->consumer_index; 245 pool->consumer_index++; 246 if (pool->consumer_index >= pool->size) 247 pool->consumer_index = 0; 248 index = pool->free_map[free_index]; 249 250 BUG_ON(index == IBM_VETH_INVALID_MAP); 251 BUG_ON(pool->skbuff[index] != NULL); 252 253 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, 254 pool->buff_size, DMA_FROM_DEVICE); 255 256 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 257 goto failure; 258 259 pool->free_map[free_index] = IBM_VETH_INVALID_MAP; 260 pool->dma_addr[index] = dma_addr; 261 pool->skbuff[index] = skb; 262 263 correlator = ((u64)pool->index << 32) | index; 264 *(u64 *)skb->data = correlator; 265 266 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; 267 desc.fields.address = dma_addr; 268 269 if (rx_flush) { 270 unsigned int len = min(pool->buff_size, 271 adapter->netdev->mtu + 272 IBMVETH_BUFF_OH); 273 ibmveth_flush_buffer(skb->data, len); 274 } 275 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, 276 desc.desc); 277 278 if (lpar_rc != H_SUCCESS) { 279 goto failure; 280 } else { 281 buffers_added++; 282 adapter->replenish_add_buff_success++; 283 } 284 } 285 286 mb(); 287 atomic_add(buffers_added, &(pool->available)); 288 return; 289 290 failure: 291 pool->free_map[free_index] = index; 292 pool->skbuff[index] = NULL; 293 if (pool->consumer_index == 0) 294 pool->consumer_index = pool->size - 1; 295 else 296 pool->consumer_index--; 297 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) 298 dma_unmap_single(&adapter->vdev->dev, 299 pool->dma_addr[index], pool->buff_size, 300 DMA_FROM_DEVICE); 301 dev_kfree_skb_any(skb); 302 adapter->replenish_add_buff_failure++; 303 304 mb(); 305 atomic_add(buffers_added, &(pool->available)); 306 } 307 308 /* 309 * The final 8 bytes of the buffer list is a counter of frames dropped 310 * because there was not a buffer in the buffer list capable of holding 311 * the frame. 312 */ 313 static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter) 314 { 315 __be64 *p = adapter->buffer_list_addr + 4096 - 8; 316 317 adapter->rx_no_buffer = be64_to_cpup(p); 318 } 319 320 /* replenish routine */ 321 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) 322 { 323 int i; 324 325 adapter->replenish_task_cycles++; 326 327 for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { 328 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; 329 330 if (pool->active && 331 (atomic_read(&pool->available) < pool->threshold)) 332 ibmveth_replenish_buffer_pool(adapter, pool); 333 } 334 335 ibmveth_update_rx_no_buffer(adapter); 336 } 337 338 /* empty and free ana buffer pool - also used to do cleanup in error paths */ 339 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, 340 struct ibmveth_buff_pool *pool) 341 { 342 int i; 343 344 kfree(pool->free_map); 345 pool->free_map = NULL; 346 347 if (pool->skbuff && pool->dma_addr) { 348 for (i = 0; i < pool->size; ++i) { 349 struct sk_buff *skb = pool->skbuff[i]; 350 if (skb) { 351 dma_unmap_single(&adapter->vdev->dev, 352 pool->dma_addr[i], 353 pool->buff_size, 354 DMA_FROM_DEVICE); 355 dev_kfree_skb_any(skb); 356 pool->skbuff[i] = NULL; 357 } 358 } 359 } 360 361 if (pool->dma_addr) { 362 kfree(pool->dma_addr); 363 pool->dma_addr = NULL; 364 } 365 366 if (pool->skbuff) { 367 kfree(pool->skbuff); 368 pool->skbuff = NULL; 369 } 370 } 371 372 /* remove a buffer from a pool */ 373 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, 374 u64 correlator) 375 { 376 unsigned int pool = correlator >> 32; 377 unsigned int index = correlator & 0xffffffffUL; 378 unsigned int free_index; 379 struct sk_buff *skb; 380 381 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 382 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 383 384 skb = adapter->rx_buff_pool[pool].skbuff[index]; 385 386 BUG_ON(skb == NULL); 387 388 adapter->rx_buff_pool[pool].skbuff[index] = NULL; 389 390 dma_unmap_single(&adapter->vdev->dev, 391 adapter->rx_buff_pool[pool].dma_addr[index], 392 adapter->rx_buff_pool[pool].buff_size, 393 DMA_FROM_DEVICE); 394 395 free_index = adapter->rx_buff_pool[pool].producer_index; 396 adapter->rx_buff_pool[pool].producer_index++; 397 if (adapter->rx_buff_pool[pool].producer_index >= 398 adapter->rx_buff_pool[pool].size) 399 adapter->rx_buff_pool[pool].producer_index = 0; 400 adapter->rx_buff_pool[pool].free_map[free_index] = index; 401 402 mb(); 403 404 atomic_dec(&(adapter->rx_buff_pool[pool].available)); 405 } 406 407 /* get the current buffer on the rx queue */ 408 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) 409 { 410 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; 411 unsigned int pool = correlator >> 32; 412 unsigned int index = correlator & 0xffffffffUL; 413 414 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 415 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 416 417 return adapter->rx_buff_pool[pool].skbuff[index]; 418 } 419 420 /* recycle the current buffer on the rx queue */ 421 static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) 422 { 423 u32 q_index = adapter->rx_queue.index; 424 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; 425 unsigned int pool = correlator >> 32; 426 unsigned int index = correlator & 0xffffffffUL; 427 union ibmveth_buf_desc desc; 428 unsigned long lpar_rc; 429 int ret = 1; 430 431 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); 432 BUG_ON(index >= adapter->rx_buff_pool[pool].size); 433 434 if (!adapter->rx_buff_pool[pool].active) { 435 ibmveth_rxq_harvest_buffer(adapter); 436 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); 437 goto out; 438 } 439 440 desc.fields.flags_len = IBMVETH_BUF_VALID | 441 adapter->rx_buff_pool[pool].buff_size; 442 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; 443 444 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); 445 446 if (lpar_rc != H_SUCCESS) { 447 netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " 448 "during recycle rc=%ld", lpar_rc); 449 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); 450 ret = 0; 451 } 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 out: 459 return ret; 460 } 461 462 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) 463 { 464 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); 465 466 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { 467 adapter->rx_queue.index = 0; 468 adapter->rx_queue.toggle = !adapter->rx_queue.toggle; 469 } 470 } 471 472 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, 473 union ibmveth_buf_desc rxq_desc, u64 mac_address) 474 { 475 int rc, try_again = 1; 476 477 /* 478 * After a kexec the adapter will still be open, so our attempt to 479 * open it will fail. So if we get a failure we free the adapter and 480 * try again, but only once. 481 */ 482 retry: 483 rc = h_register_logical_lan(adapter->vdev->unit_address, 484 adapter->buffer_list_dma, rxq_desc.desc, 485 adapter->filter_list_dma, mac_address); 486 487 if (rc != H_SUCCESS && try_again) { 488 do { 489 rc = h_free_logical_lan(adapter->vdev->unit_address); 490 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); 491 492 try_again = 0; 493 goto retry; 494 } 495 496 return rc; 497 } 498 499 static u64 ibmveth_encode_mac_addr(u8 *mac) 500 { 501 int i; 502 u64 encoded = 0; 503 504 for (i = 0; i < ETH_ALEN; i++) 505 encoded = (encoded << 8) | mac[i]; 506 507 return encoded; 508 } 509 510 static int ibmveth_open(struct net_device *netdev) 511 { 512 struct ibmveth_adapter *adapter = netdev_priv(netdev); 513 u64 mac_address; 514 int rxq_entries = 1; 515 unsigned long lpar_rc; 516 int rc; 517 union ibmveth_buf_desc rxq_desc; 518 int i; 519 struct device *dev; 520 521 netdev_dbg(netdev, "open starting\n"); 522 523 napi_enable(&adapter->napi); 524 525 for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 526 rxq_entries += adapter->rx_buff_pool[i].size; 527 528 rc = -ENOMEM; 529 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); 530 if (!adapter->buffer_list_addr) { 531 netdev_err(netdev, "unable to allocate list pages\n"); 532 goto out; 533 } 534 535 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); 536 if (!adapter->filter_list_addr) { 537 netdev_err(netdev, "unable to allocate filter pages\n"); 538 goto out_free_buffer_list; 539 } 540 541 dev = &adapter->vdev->dev; 542 543 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * 544 rxq_entries; 545 adapter->rx_queue.queue_addr = 546 dma_alloc_coherent(dev, adapter->rx_queue.queue_len, 547 &adapter->rx_queue.queue_dma, GFP_KERNEL); 548 if (!adapter->rx_queue.queue_addr) 549 goto out_free_filter_list; 550 551 adapter->buffer_list_dma = dma_map_single(dev, 552 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); 553 if (dma_mapping_error(dev, adapter->buffer_list_dma)) { 554 netdev_err(netdev, "unable to map buffer list pages\n"); 555 goto out_free_queue_mem; 556 } 557 558 adapter->filter_list_dma = dma_map_single(dev, 559 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); 560 if (dma_mapping_error(dev, adapter->filter_list_dma)) { 561 netdev_err(netdev, "unable to map filter list pages\n"); 562 goto out_unmap_buffer_list; 563 } 564 565 adapter->rx_queue.index = 0; 566 adapter->rx_queue.num_slots = rxq_entries; 567 adapter->rx_queue.toggle = 1; 568 569 mac_address = ibmveth_encode_mac_addr(netdev->dev_addr); 570 571 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | 572 adapter->rx_queue.queue_len; 573 rxq_desc.fields.address = adapter->rx_queue.queue_dma; 574 575 netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); 576 netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); 577 netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); 578 579 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); 580 581 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); 582 583 if (lpar_rc != H_SUCCESS) { 584 netdev_err(netdev, "h_register_logical_lan failed with %ld\n", 585 lpar_rc); 586 netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " 587 "desc:0x%llx MAC:0x%llx\n", 588 adapter->buffer_list_dma, 589 adapter->filter_list_dma, 590 rxq_desc.desc, 591 mac_address); 592 rc = -ENONET; 593 goto out_unmap_filter_list; 594 } 595 596 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 597 if (!adapter->rx_buff_pool[i].active) 598 continue; 599 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { 600 netdev_err(netdev, "unable to alloc pool\n"); 601 adapter->rx_buff_pool[i].active = 0; 602 rc = -ENOMEM; 603 goto out_free_buffer_pools; 604 } 605 } 606 607 netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); 608 rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, 609 netdev); 610 if (rc != 0) { 611 netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", 612 netdev->irq, rc); 613 do { 614 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); 615 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); 616 617 goto out_free_buffer_pools; 618 } 619 620 rc = -ENOMEM; 621 adapter->bounce_buffer = 622 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); 623 if (!adapter->bounce_buffer) 624 goto out_free_irq; 625 626 adapter->bounce_buffer_dma = 627 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, 628 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); 629 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 630 netdev_err(netdev, "unable to map bounce buffer\n"); 631 goto out_free_bounce_buffer; 632 } 633 634 netdev_dbg(netdev, "initial replenish cycle\n"); 635 ibmveth_interrupt(netdev->irq, netdev); 636 637 netif_start_queue(netdev); 638 639 netdev_dbg(netdev, "open complete\n"); 640 641 return 0; 642 643 out_free_bounce_buffer: 644 kfree(adapter->bounce_buffer); 645 out_free_irq: 646 free_irq(netdev->irq, netdev); 647 out_free_buffer_pools: 648 while (--i >= 0) { 649 if (adapter->rx_buff_pool[i].active) 650 ibmveth_free_buffer_pool(adapter, 651 &adapter->rx_buff_pool[i]); 652 } 653 out_unmap_filter_list: 654 dma_unmap_single(dev, adapter->filter_list_dma, 4096, 655 DMA_BIDIRECTIONAL); 656 out_unmap_buffer_list: 657 dma_unmap_single(dev, adapter->buffer_list_dma, 4096, 658 DMA_BIDIRECTIONAL); 659 out_free_queue_mem: 660 dma_free_coherent(dev, adapter->rx_queue.queue_len, 661 adapter->rx_queue.queue_addr, 662 adapter->rx_queue.queue_dma); 663 out_free_filter_list: 664 free_page((unsigned long)adapter->filter_list_addr); 665 out_free_buffer_list: 666 free_page((unsigned long)adapter->buffer_list_addr); 667 out: 668 napi_disable(&adapter->napi); 669 return rc; 670 } 671 672 static int ibmveth_close(struct net_device *netdev) 673 { 674 struct ibmveth_adapter *adapter = netdev_priv(netdev); 675 struct device *dev = &adapter->vdev->dev; 676 long lpar_rc; 677 int i; 678 679 netdev_dbg(netdev, "close starting\n"); 680 681 napi_disable(&adapter->napi); 682 683 if (!adapter->pool_config) 684 netif_stop_queue(netdev); 685 686 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); 687 688 do { 689 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); 690 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); 691 692 if (lpar_rc != H_SUCCESS) { 693 netdev_err(netdev, "h_free_logical_lan failed with %lx, " 694 "continuing with close\n", lpar_rc); 695 } 696 697 free_irq(netdev->irq, netdev); 698 699 ibmveth_update_rx_no_buffer(adapter); 700 701 dma_unmap_single(dev, adapter->buffer_list_dma, 4096, 702 DMA_BIDIRECTIONAL); 703 free_page((unsigned long)adapter->buffer_list_addr); 704 705 dma_unmap_single(dev, adapter->filter_list_dma, 4096, 706 DMA_BIDIRECTIONAL); 707 free_page((unsigned long)adapter->filter_list_addr); 708 709 dma_free_coherent(dev, adapter->rx_queue.queue_len, 710 adapter->rx_queue.queue_addr, 711 adapter->rx_queue.queue_dma); 712 713 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 714 if (adapter->rx_buff_pool[i].active) 715 ibmveth_free_buffer_pool(adapter, 716 &adapter->rx_buff_pool[i]); 717 718 dma_unmap_single(&adapter->vdev->dev, adapter->bounce_buffer_dma, 719 adapter->netdev->mtu + IBMVETH_BUFF_OH, 720 DMA_BIDIRECTIONAL); 721 kfree(adapter->bounce_buffer); 722 723 netdev_dbg(netdev, "close complete\n"); 724 725 return 0; 726 } 727 728 static int netdev_get_link_ksettings(struct net_device *dev, 729 struct ethtool_link_ksettings *cmd) 730 { 731 u32 supported, advertising; 732 733 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 734 SUPPORTED_FIBRE); 735 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 736 ADVERTISED_FIBRE); 737 cmd->base.speed = SPEED_1000; 738 cmd->base.duplex = DUPLEX_FULL; 739 cmd->base.port = PORT_FIBRE; 740 cmd->base.phy_address = 0; 741 cmd->base.autoneg = AUTONEG_ENABLE; 742 743 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 744 supported); 745 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 746 advertising); 747 748 return 0; 749 } 750 751 static void netdev_get_drvinfo(struct net_device *dev, 752 struct ethtool_drvinfo *info) 753 { 754 strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); 755 strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); 756 } 757 758 static netdev_features_t ibmveth_fix_features(struct net_device *dev, 759 netdev_features_t features) 760 { 761 /* 762 * Since the ibmveth firmware interface does not have the 763 * concept of separate tx/rx checksum offload enable, if rx 764 * checksum is disabled we also have to disable tx checksum 765 * offload. Once we disable rx checksum offload, we are no 766 * longer allowed to send tx buffers that are not properly 767 * checksummed. 768 */ 769 770 if (!(features & NETIF_F_RXCSUM)) 771 features &= ~NETIF_F_CSUM_MASK; 772 773 return features; 774 } 775 776 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) 777 { 778 struct ibmveth_adapter *adapter = netdev_priv(dev); 779 unsigned long set_attr, clr_attr, ret_attr; 780 unsigned long set_attr6, clr_attr6; 781 long ret, ret4, ret6; 782 int rc1 = 0, rc2 = 0; 783 int restart = 0; 784 785 if (netif_running(dev)) { 786 restart = 1; 787 adapter->pool_config = 1; 788 ibmveth_close(dev); 789 adapter->pool_config = 0; 790 } 791 792 set_attr = 0; 793 clr_attr = 0; 794 set_attr6 = 0; 795 clr_attr6 = 0; 796 797 if (data) { 798 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; 799 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; 800 } else { 801 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; 802 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; 803 } 804 805 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 806 807 if (ret == H_SUCCESS && 808 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { 809 ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, 810 set_attr, &ret_attr); 811 812 if (ret4 != H_SUCCESS) { 813 netdev_err(dev, "unable to change IPv4 checksum " 814 "offload settings. %d rc=%ld\n", 815 data, ret4); 816 817 h_illan_attributes(adapter->vdev->unit_address, 818 set_attr, clr_attr, &ret_attr); 819 820 if (data == 1) 821 dev->features &= ~NETIF_F_IP_CSUM; 822 823 } else { 824 adapter->fw_ipv4_csum_support = data; 825 } 826 827 ret6 = h_illan_attributes(adapter->vdev->unit_address, 828 clr_attr6, set_attr6, &ret_attr); 829 830 if (ret6 != H_SUCCESS) { 831 netdev_err(dev, "unable to change IPv6 checksum " 832 "offload settings. %d rc=%ld\n", 833 data, ret6); 834 835 h_illan_attributes(adapter->vdev->unit_address, 836 set_attr6, clr_attr6, &ret_attr); 837 838 if (data == 1) 839 dev->features &= ~NETIF_F_IPV6_CSUM; 840 841 } else 842 adapter->fw_ipv6_csum_support = data; 843 844 if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) 845 adapter->rx_csum = data; 846 else 847 rc1 = -EIO; 848 } else { 849 rc1 = -EIO; 850 netdev_err(dev, "unable to change checksum offload settings." 851 " %d rc=%ld ret_attr=%lx\n", data, ret, 852 ret_attr); 853 } 854 855 if (restart) 856 rc2 = ibmveth_open(dev); 857 858 return rc1 ? rc1 : rc2; 859 } 860 861 static int ibmveth_set_tso(struct net_device *dev, u32 data) 862 { 863 struct ibmveth_adapter *adapter = netdev_priv(dev); 864 unsigned long set_attr, clr_attr, ret_attr; 865 long ret1, ret2; 866 int rc1 = 0, rc2 = 0; 867 int restart = 0; 868 869 if (netif_running(dev)) { 870 restart = 1; 871 adapter->pool_config = 1; 872 ibmveth_close(dev); 873 adapter->pool_config = 0; 874 } 875 876 set_attr = 0; 877 clr_attr = 0; 878 879 if (data) 880 set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; 881 else 882 clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; 883 884 ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 885 886 if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && 887 !old_large_send) { 888 ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, 889 set_attr, &ret_attr); 890 891 if (ret2 != H_SUCCESS) { 892 netdev_err(dev, "unable to change tso settings. %d rc=%ld\n", 893 data, ret2); 894 895 h_illan_attributes(adapter->vdev->unit_address, 896 set_attr, clr_attr, &ret_attr); 897 898 if (data == 1) 899 dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 900 rc1 = -EIO; 901 902 } else { 903 adapter->fw_large_send_support = data; 904 adapter->large_send = data; 905 } 906 } else { 907 /* Older firmware version of large send offload does not 908 * support tcp6/ipv6 909 */ 910 if (data == 1) { 911 dev->features &= ~NETIF_F_TSO6; 912 netdev_info(dev, "TSO feature requires all partitions to have updated driver"); 913 } 914 adapter->large_send = data; 915 } 916 917 if (restart) 918 rc2 = ibmveth_open(dev); 919 920 return rc1 ? rc1 : rc2; 921 } 922 923 static int ibmveth_set_features(struct net_device *dev, 924 netdev_features_t features) 925 { 926 struct ibmveth_adapter *adapter = netdev_priv(dev); 927 int rx_csum = !!(features & NETIF_F_RXCSUM); 928 int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6)); 929 int rc1 = 0, rc2 = 0; 930 931 if (rx_csum != adapter->rx_csum) { 932 rc1 = ibmveth_set_csum_offload(dev, rx_csum); 933 if (rc1 && !adapter->rx_csum) 934 dev->features = 935 features & ~(NETIF_F_CSUM_MASK | 936 NETIF_F_RXCSUM); 937 } 938 939 if (large_send != adapter->large_send) { 940 rc2 = ibmveth_set_tso(dev, large_send); 941 if (rc2 && !adapter->large_send) 942 dev->features = 943 features & ~(NETIF_F_TSO | NETIF_F_TSO6); 944 } 945 946 return rc1 ? rc1 : rc2; 947 } 948 949 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) 950 { 951 int i; 952 953 if (stringset != ETH_SS_STATS) 954 return; 955 956 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) 957 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); 958 } 959 960 static int ibmveth_get_sset_count(struct net_device *dev, int sset) 961 { 962 switch (sset) { 963 case ETH_SS_STATS: 964 return ARRAY_SIZE(ibmveth_stats); 965 default: 966 return -EOPNOTSUPP; 967 } 968 } 969 970 static void ibmveth_get_ethtool_stats(struct net_device *dev, 971 struct ethtool_stats *stats, u64 *data) 972 { 973 int i; 974 struct ibmveth_adapter *adapter = netdev_priv(dev); 975 976 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) 977 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); 978 } 979 980 static const struct ethtool_ops netdev_ethtool_ops = { 981 .get_drvinfo = netdev_get_drvinfo, 982 .get_link = ethtool_op_get_link, 983 .get_strings = ibmveth_get_strings, 984 .get_sset_count = ibmveth_get_sset_count, 985 .get_ethtool_stats = ibmveth_get_ethtool_stats, 986 .get_link_ksettings = netdev_get_link_ksettings, 987 }; 988 989 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 990 { 991 return -EOPNOTSUPP; 992 } 993 994 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) 995 996 static int ibmveth_send(struct ibmveth_adapter *adapter, 997 union ibmveth_buf_desc *descs, unsigned long mss) 998 { 999 unsigned long correlator; 1000 unsigned int retry_count; 1001 unsigned long ret; 1002 1003 /* 1004 * The retry count sets a maximum for the number of broadcast and 1005 * multicast destinations within the system. 1006 */ 1007 retry_count = 1024; 1008 correlator = 0; 1009 do { 1010 ret = h_send_logical_lan(adapter->vdev->unit_address, 1011 descs[0].desc, descs[1].desc, 1012 descs[2].desc, descs[3].desc, 1013 descs[4].desc, descs[5].desc, 1014 correlator, &correlator, mss, 1015 adapter->fw_large_send_support); 1016 } while ((ret == H_BUSY) && (retry_count--)); 1017 1018 if (ret != H_SUCCESS && ret != H_DROPPED) { 1019 netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " 1020 "with rc=%ld\n", ret); 1021 return 1; 1022 } 1023 1024 return 0; 1025 } 1026 1027 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, 1028 struct net_device *netdev) 1029 { 1030 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1031 unsigned int desc_flags; 1032 union ibmveth_buf_desc descs[6]; 1033 int last, i; 1034 int force_bounce = 0; 1035 dma_addr_t dma_addr; 1036 unsigned long mss = 0; 1037 1038 /* veth doesn't handle frag_list, so linearize the skb. 1039 * When GRO is enabled SKB's can have frag_list. 1040 */ 1041 if (adapter->is_active_trunk && 1042 skb_has_frag_list(skb) && __skb_linearize(skb)) { 1043 netdev->stats.tx_dropped++; 1044 goto out; 1045 } 1046 1047 /* 1048 * veth handles a maximum of 6 segments including the header, so 1049 * we have to linearize the skb if there are more than this. 1050 */ 1051 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { 1052 netdev->stats.tx_dropped++; 1053 goto out; 1054 } 1055 1056 /* veth can't checksum offload UDP */ 1057 if (skb->ip_summed == CHECKSUM_PARTIAL && 1058 ((skb->protocol == htons(ETH_P_IP) && 1059 ip_hdr(skb)->protocol != IPPROTO_TCP) || 1060 (skb->protocol == htons(ETH_P_IPV6) && 1061 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && 1062 skb_checksum_help(skb)) { 1063 1064 netdev_err(netdev, "tx: failed to checksum packet\n"); 1065 netdev->stats.tx_dropped++; 1066 goto out; 1067 } 1068 1069 desc_flags = IBMVETH_BUF_VALID; 1070 1071 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1072 unsigned char *buf = skb_transport_header(skb) + 1073 skb->csum_offset; 1074 1075 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); 1076 1077 /* Need to zero out the checksum */ 1078 buf[0] = 0; 1079 buf[1] = 0; 1080 1081 if (skb_is_gso(skb) && adapter->fw_large_send_support) 1082 desc_flags |= IBMVETH_BUF_LRG_SND; 1083 } 1084 1085 retry_bounce: 1086 memset(descs, 0, sizeof(descs)); 1087 1088 /* 1089 * If a linear packet is below the rx threshold then 1090 * copy it into the static bounce buffer. This avoids the 1091 * cost of a TCE insert and remove. 1092 */ 1093 if (force_bounce || (!skb_is_nonlinear(skb) && 1094 (skb->len < tx_copybreak))) { 1095 skb_copy_from_linear_data(skb, adapter->bounce_buffer, 1096 skb->len); 1097 1098 descs[0].fields.flags_len = desc_flags | skb->len; 1099 descs[0].fields.address = adapter->bounce_buffer_dma; 1100 1101 if (ibmveth_send(adapter, descs, 0)) { 1102 adapter->tx_send_failed++; 1103 netdev->stats.tx_dropped++; 1104 } else { 1105 netdev->stats.tx_packets++; 1106 netdev->stats.tx_bytes += skb->len; 1107 } 1108 1109 goto out; 1110 } 1111 1112 /* Map the header */ 1113 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, 1114 skb_headlen(skb), DMA_TO_DEVICE); 1115 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 1116 goto map_failed; 1117 1118 descs[0].fields.flags_len = desc_flags | skb_headlen(skb); 1119 descs[0].fields.address = dma_addr; 1120 1121 /* Map the frags */ 1122 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1123 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1124 1125 dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, 1126 skb_frag_size(frag), DMA_TO_DEVICE); 1127 1128 if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) 1129 goto map_failed_frags; 1130 1131 descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); 1132 descs[i+1].fields.address = dma_addr; 1133 } 1134 1135 if (skb->ip_summed == CHECKSUM_PARTIAL && skb_is_gso(skb)) { 1136 if (adapter->fw_large_send_support) { 1137 mss = (unsigned long)skb_shinfo(skb)->gso_size; 1138 adapter->tx_large_packets++; 1139 } else if (!skb_is_gso_v6(skb)) { 1140 /* Put -1 in the IP checksum to tell phyp it 1141 * is a largesend packet. Put the mss in 1142 * the TCP checksum. 1143 */ 1144 ip_hdr(skb)->check = 0xffff; 1145 tcp_hdr(skb)->check = 1146 cpu_to_be16(skb_shinfo(skb)->gso_size); 1147 adapter->tx_large_packets++; 1148 } 1149 } 1150 1151 if (ibmveth_send(adapter, descs, mss)) { 1152 adapter->tx_send_failed++; 1153 netdev->stats.tx_dropped++; 1154 } else { 1155 netdev->stats.tx_packets++; 1156 netdev->stats.tx_bytes += skb->len; 1157 } 1158 1159 dma_unmap_single(&adapter->vdev->dev, 1160 descs[0].fields.address, 1161 descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1162 DMA_TO_DEVICE); 1163 1164 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) 1165 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, 1166 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1167 DMA_TO_DEVICE); 1168 1169 out: 1170 dev_consume_skb_any(skb); 1171 return NETDEV_TX_OK; 1172 1173 map_failed_frags: 1174 last = i+1; 1175 for (i = 0; i < last; i++) 1176 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, 1177 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, 1178 DMA_TO_DEVICE); 1179 1180 map_failed: 1181 if (!firmware_has_feature(FW_FEATURE_CMO)) 1182 netdev_err(netdev, "tx: unable to map xmit buffer\n"); 1183 adapter->tx_map_failed++; 1184 if (skb_linearize(skb)) { 1185 netdev->stats.tx_dropped++; 1186 goto out; 1187 } 1188 force_bounce = 1; 1189 goto retry_bounce; 1190 } 1191 1192 static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt) 1193 { 1194 struct tcphdr *tcph; 1195 int offset = 0; 1196 int hdr_len; 1197 1198 /* only TCP packets will be aggregated */ 1199 if (skb->protocol == htons(ETH_P_IP)) { 1200 struct iphdr *iph = (struct iphdr *)skb->data; 1201 1202 if (iph->protocol == IPPROTO_TCP) { 1203 offset = iph->ihl * 4; 1204 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1205 } else { 1206 return; 1207 } 1208 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1209 struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data; 1210 1211 if (iph6->nexthdr == IPPROTO_TCP) { 1212 offset = sizeof(struct ipv6hdr); 1213 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1214 } else { 1215 return; 1216 } 1217 } else { 1218 return; 1219 } 1220 /* if mss is not set through Large Packet bit/mss in rx buffer, 1221 * expect that the mss will be written to the tcp header checksum. 1222 */ 1223 tcph = (struct tcphdr *)(skb->data + offset); 1224 if (lrg_pkt) { 1225 skb_shinfo(skb)->gso_size = mss; 1226 } else if (offset) { 1227 skb_shinfo(skb)->gso_size = ntohs(tcph->check); 1228 tcph->check = 0; 1229 } 1230 1231 if (skb_shinfo(skb)->gso_size) { 1232 hdr_len = offset + tcph->doff * 4; 1233 skb_shinfo(skb)->gso_segs = 1234 DIV_ROUND_UP(skb->len - hdr_len, 1235 skb_shinfo(skb)->gso_size); 1236 } 1237 } 1238 1239 static void ibmveth_rx_csum_helper(struct sk_buff *skb, 1240 struct ibmveth_adapter *adapter) 1241 { 1242 struct iphdr *iph = NULL; 1243 struct ipv6hdr *iph6 = NULL; 1244 __be16 skb_proto = 0; 1245 u16 iphlen = 0; 1246 u16 iph_proto = 0; 1247 u16 tcphdrlen = 0; 1248 1249 skb_proto = be16_to_cpu(skb->protocol); 1250 1251 if (skb_proto == ETH_P_IP) { 1252 iph = (struct iphdr *)skb->data; 1253 1254 /* If the IP checksum is not offloaded and if the packet 1255 * is large send, the checksum must be rebuilt. 1256 */ 1257 if (iph->check == 0xffff) { 1258 iph->check = 0; 1259 iph->check = ip_fast_csum((unsigned char *)iph, 1260 iph->ihl); 1261 } 1262 1263 iphlen = iph->ihl * 4; 1264 iph_proto = iph->protocol; 1265 } else if (skb_proto == ETH_P_IPV6) { 1266 iph6 = (struct ipv6hdr *)skb->data; 1267 iphlen = sizeof(struct ipv6hdr); 1268 iph_proto = iph6->nexthdr; 1269 } 1270 1271 /* In OVS environment, when a flow is not cached, specifically for a 1272 * new TCP connection, the first packet information is passed up 1273 * the user space for finding a flow. During this process, OVS computes 1274 * checksum on the first packet when CHECKSUM_PARTIAL flag is set. 1275 * 1276 * Given that we zeroed out TCP checksum field in transmit path 1277 * (refer ibmveth_start_xmit routine) as we set "no checksum bit", 1278 * OVS computed checksum will be incorrect w/o TCP pseudo checksum 1279 * in the packet. This leads to OVS dropping the packet and hence 1280 * TCP retransmissions are seen. 1281 * 1282 * So, re-compute TCP pseudo header checksum. 1283 */ 1284 if (iph_proto == IPPROTO_TCP && adapter->is_active_trunk) { 1285 struct tcphdr *tcph = (struct tcphdr *)(skb->data + iphlen); 1286 1287 tcphdrlen = skb->len - iphlen; 1288 1289 /* Recompute TCP pseudo header checksum */ 1290 if (skb_proto == ETH_P_IP) 1291 tcph->check = ~csum_tcpudp_magic(iph->saddr, 1292 iph->daddr, tcphdrlen, iph_proto, 0); 1293 else if (skb_proto == ETH_P_IPV6) 1294 tcph->check = ~csum_ipv6_magic(&iph6->saddr, 1295 &iph6->daddr, tcphdrlen, iph_proto, 0); 1296 1297 /* Setup SKB fields for checksum offload */ 1298 skb_partial_csum_set(skb, iphlen, 1299 offsetof(struct tcphdr, check)); 1300 skb_reset_network_header(skb); 1301 } 1302 } 1303 1304 static int ibmveth_poll(struct napi_struct *napi, int budget) 1305 { 1306 struct ibmveth_adapter *adapter = 1307 container_of(napi, struct ibmveth_adapter, napi); 1308 struct net_device *netdev = adapter->netdev; 1309 int frames_processed = 0; 1310 unsigned long lpar_rc; 1311 u16 mss = 0; 1312 1313 restart_poll: 1314 while (frames_processed < budget) { 1315 if (!ibmveth_rxq_pending_buffer(adapter)) 1316 break; 1317 1318 smp_rmb(); 1319 if (!ibmveth_rxq_buffer_valid(adapter)) { 1320 wmb(); /* suggested by larson1 */ 1321 adapter->rx_invalid_buffer++; 1322 netdev_dbg(netdev, "recycling invalid buffer\n"); 1323 ibmveth_rxq_recycle_buffer(adapter); 1324 } else { 1325 struct sk_buff *skb, *new_skb; 1326 int length = ibmveth_rxq_frame_length(adapter); 1327 int offset = ibmveth_rxq_frame_offset(adapter); 1328 int csum_good = ibmveth_rxq_csum_good(adapter); 1329 int lrg_pkt = ibmveth_rxq_large_packet(adapter); 1330 1331 skb = ibmveth_rxq_get_buffer(adapter); 1332 1333 /* if the large packet bit is set in the rx queue 1334 * descriptor, the mss will be written by PHYP eight 1335 * bytes from the start of the rx buffer, which is 1336 * skb->data at this stage 1337 */ 1338 if (lrg_pkt) { 1339 __be64 *rxmss = (__be64 *)(skb->data + 8); 1340 1341 mss = (u16)be64_to_cpu(*rxmss); 1342 } 1343 1344 new_skb = NULL; 1345 if (length < rx_copybreak) 1346 new_skb = netdev_alloc_skb(netdev, length); 1347 1348 if (new_skb) { 1349 skb_copy_to_linear_data(new_skb, 1350 skb->data + offset, 1351 length); 1352 if (rx_flush) 1353 ibmveth_flush_buffer(skb->data, 1354 length + offset); 1355 if (!ibmveth_rxq_recycle_buffer(adapter)) 1356 kfree_skb(skb); 1357 skb = new_skb; 1358 } else { 1359 ibmveth_rxq_harvest_buffer(adapter); 1360 skb_reserve(skb, offset); 1361 } 1362 1363 skb_put(skb, length); 1364 skb->protocol = eth_type_trans(skb, netdev); 1365 1366 if (csum_good) { 1367 skb->ip_summed = CHECKSUM_UNNECESSARY; 1368 ibmveth_rx_csum_helper(skb, adapter); 1369 } 1370 1371 if (length > netdev->mtu + ETH_HLEN) { 1372 ibmveth_rx_mss_helper(skb, mss, lrg_pkt); 1373 adapter->rx_large_packets++; 1374 } 1375 1376 napi_gro_receive(napi, skb); /* send it up */ 1377 1378 netdev->stats.rx_packets++; 1379 netdev->stats.rx_bytes += length; 1380 frames_processed++; 1381 } 1382 } 1383 1384 ibmveth_replenish_task(adapter); 1385 1386 if (frames_processed < budget) { 1387 napi_complete_done(napi, frames_processed); 1388 1389 /* We think we are done - reenable interrupts, 1390 * then check once more to make sure we are done. 1391 */ 1392 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1393 VIO_IRQ_ENABLE); 1394 1395 BUG_ON(lpar_rc != H_SUCCESS); 1396 1397 if (ibmveth_rxq_pending_buffer(adapter) && 1398 napi_reschedule(napi)) { 1399 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1400 VIO_IRQ_DISABLE); 1401 goto restart_poll; 1402 } 1403 } 1404 1405 return frames_processed; 1406 } 1407 1408 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) 1409 { 1410 struct net_device *netdev = dev_instance; 1411 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1412 unsigned long lpar_rc; 1413 1414 if (napi_schedule_prep(&adapter->napi)) { 1415 lpar_rc = h_vio_signal(adapter->vdev->unit_address, 1416 VIO_IRQ_DISABLE); 1417 BUG_ON(lpar_rc != H_SUCCESS); 1418 __napi_schedule(&adapter->napi); 1419 } 1420 return IRQ_HANDLED; 1421 } 1422 1423 static void ibmveth_set_multicast_list(struct net_device *netdev) 1424 { 1425 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1426 unsigned long lpar_rc; 1427 1428 if ((netdev->flags & IFF_PROMISC) || 1429 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { 1430 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1431 IbmVethMcastEnableRecv | 1432 IbmVethMcastDisableFiltering, 1433 0); 1434 if (lpar_rc != H_SUCCESS) { 1435 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1436 "entering promisc mode\n", lpar_rc); 1437 } 1438 } else { 1439 struct netdev_hw_addr *ha; 1440 /* clear the filter table & disable filtering */ 1441 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1442 IbmVethMcastEnableRecv | 1443 IbmVethMcastDisableFiltering | 1444 IbmVethMcastClearFilterTable, 1445 0); 1446 if (lpar_rc != H_SUCCESS) { 1447 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1448 "attempting to clear filter table\n", 1449 lpar_rc); 1450 } 1451 /* add the addresses to the filter table */ 1452 netdev_for_each_mc_addr(ha, netdev) { 1453 /* add the multicast address to the filter table */ 1454 u64 mcast_addr; 1455 mcast_addr = ibmveth_encode_mac_addr(ha->addr); 1456 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1457 IbmVethMcastAddFilter, 1458 mcast_addr); 1459 if (lpar_rc != H_SUCCESS) { 1460 netdev_err(netdev, "h_multicast_ctrl rc=%ld " 1461 "when adding an entry to the filter " 1462 "table\n", lpar_rc); 1463 } 1464 } 1465 1466 /* re-enable filtering */ 1467 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, 1468 IbmVethMcastEnableFiltering, 1469 0); 1470 if (lpar_rc != H_SUCCESS) { 1471 netdev_err(netdev, "h_multicast_ctrl rc=%ld when " 1472 "enabling filtering\n", lpar_rc); 1473 } 1474 } 1475 } 1476 1477 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) 1478 { 1479 struct ibmveth_adapter *adapter = netdev_priv(dev); 1480 struct vio_dev *viodev = adapter->vdev; 1481 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; 1482 int i, rc; 1483 int need_restart = 0; 1484 1485 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 1486 if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) 1487 break; 1488 1489 if (i == IBMVETH_NUM_BUFF_POOLS) 1490 return -EINVAL; 1491 1492 /* Deactivate all the buffer pools so that the next loop can activate 1493 only the buffer pools necessary to hold the new MTU */ 1494 if (netif_running(adapter->netdev)) { 1495 need_restart = 1; 1496 adapter->pool_config = 1; 1497 ibmveth_close(adapter->netdev); 1498 adapter->pool_config = 0; 1499 } 1500 1501 /* Look for an active buffer pool that can hold the new MTU */ 1502 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1503 adapter->rx_buff_pool[i].active = 1; 1504 1505 if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) { 1506 dev->mtu = new_mtu; 1507 vio_cmo_set_dev_desired(viodev, 1508 ibmveth_get_desired_dma 1509 (viodev)); 1510 if (need_restart) { 1511 return ibmveth_open(adapter->netdev); 1512 } 1513 return 0; 1514 } 1515 } 1516 1517 if (need_restart && (rc = ibmveth_open(adapter->netdev))) 1518 return rc; 1519 1520 return -EINVAL; 1521 } 1522 1523 #ifdef CONFIG_NET_POLL_CONTROLLER 1524 static void ibmveth_poll_controller(struct net_device *dev) 1525 { 1526 ibmveth_replenish_task(netdev_priv(dev)); 1527 ibmveth_interrupt(dev->irq, dev); 1528 } 1529 #endif 1530 1531 /** 1532 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver 1533 * 1534 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned 1535 * 1536 * Return value: 1537 * Number of bytes of IO data the driver will need to perform well. 1538 */ 1539 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) 1540 { 1541 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 1542 struct ibmveth_adapter *adapter; 1543 struct iommu_table *tbl; 1544 unsigned long ret; 1545 int i; 1546 int rxqentries = 1; 1547 1548 tbl = get_iommu_table_base(&vdev->dev); 1549 1550 /* netdev inits at probe time along with the structures we need below*/ 1551 if (netdev == NULL) 1552 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); 1553 1554 adapter = netdev_priv(netdev); 1555 1556 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; 1557 ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); 1558 1559 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1560 /* add the size of the active receive buffers */ 1561 if (adapter->rx_buff_pool[i].active) 1562 ret += 1563 adapter->rx_buff_pool[i].size * 1564 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. 1565 buff_size, tbl); 1566 rxqentries += adapter->rx_buff_pool[i].size; 1567 } 1568 /* add the size of the receive queue entries */ 1569 ret += IOMMU_PAGE_ALIGN( 1570 rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); 1571 1572 return ret; 1573 } 1574 1575 static int ibmveth_set_mac_addr(struct net_device *dev, void *p) 1576 { 1577 struct ibmveth_adapter *adapter = netdev_priv(dev); 1578 struct sockaddr *addr = p; 1579 u64 mac_address; 1580 int rc; 1581 1582 if (!is_valid_ether_addr(addr->sa_data)) 1583 return -EADDRNOTAVAIL; 1584 1585 mac_address = ibmveth_encode_mac_addr(addr->sa_data); 1586 rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address); 1587 if (rc) { 1588 netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc); 1589 return rc; 1590 } 1591 1592 ether_addr_copy(dev->dev_addr, addr->sa_data); 1593 1594 return 0; 1595 } 1596 1597 static const struct net_device_ops ibmveth_netdev_ops = { 1598 .ndo_open = ibmveth_open, 1599 .ndo_stop = ibmveth_close, 1600 .ndo_start_xmit = ibmveth_start_xmit, 1601 .ndo_set_rx_mode = ibmveth_set_multicast_list, 1602 .ndo_do_ioctl = ibmveth_ioctl, 1603 .ndo_change_mtu = ibmveth_change_mtu, 1604 .ndo_fix_features = ibmveth_fix_features, 1605 .ndo_set_features = ibmveth_set_features, 1606 .ndo_validate_addr = eth_validate_addr, 1607 .ndo_set_mac_address = ibmveth_set_mac_addr, 1608 #ifdef CONFIG_NET_POLL_CONTROLLER 1609 .ndo_poll_controller = ibmveth_poll_controller, 1610 #endif 1611 }; 1612 1613 static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) 1614 { 1615 int rc, i, mac_len; 1616 struct net_device *netdev; 1617 struct ibmveth_adapter *adapter; 1618 unsigned char *mac_addr_p; 1619 unsigned int *mcastFilterSize_p; 1620 long ret; 1621 unsigned long ret_attr; 1622 1623 dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", 1624 dev->unit_address); 1625 1626 mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, 1627 &mac_len); 1628 if (!mac_addr_p) { 1629 dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); 1630 return -EINVAL; 1631 } 1632 /* Workaround for old/broken pHyp */ 1633 if (mac_len == 8) 1634 mac_addr_p += 2; 1635 else if (mac_len != 6) { 1636 dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", 1637 mac_len); 1638 return -EINVAL; 1639 } 1640 1641 mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, 1642 VETH_MCAST_FILTER_SIZE, NULL); 1643 if (!mcastFilterSize_p) { 1644 dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " 1645 "attribute\n"); 1646 return -EINVAL; 1647 } 1648 1649 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); 1650 1651 if (!netdev) 1652 return -ENOMEM; 1653 1654 adapter = netdev_priv(netdev); 1655 dev_set_drvdata(&dev->dev, netdev); 1656 1657 adapter->vdev = dev; 1658 adapter->netdev = netdev; 1659 adapter->mcastFilterSize = *mcastFilterSize_p; 1660 adapter->pool_config = 0; 1661 1662 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); 1663 1664 netdev->irq = dev->irq; 1665 netdev->netdev_ops = &ibmveth_netdev_ops; 1666 netdev->ethtool_ops = &netdev_ethtool_ops; 1667 SET_NETDEV_DEV(netdev, &dev->dev); 1668 netdev->hw_features = NETIF_F_SG; 1669 if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) { 1670 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1671 NETIF_F_RXCSUM; 1672 } 1673 1674 netdev->features |= netdev->hw_features; 1675 1676 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); 1677 1678 /* If running older firmware, TSO should not be enabled by default */ 1679 if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && 1680 !old_large_send) { 1681 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 1682 netdev->features |= netdev->hw_features; 1683 } else { 1684 netdev->hw_features |= NETIF_F_TSO; 1685 } 1686 1687 adapter->is_active_trunk = false; 1688 if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK)) { 1689 adapter->is_active_trunk = true; 1690 netdev->hw_features |= NETIF_F_FRAGLIST; 1691 netdev->features |= NETIF_F_FRAGLIST; 1692 } 1693 1694 netdev->min_mtu = IBMVETH_MIN_MTU; 1695 netdev->max_mtu = ETH_MAX_MTU; 1696 1697 memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); 1698 1699 if (firmware_has_feature(FW_FEATURE_CMO)) 1700 memcpy(pool_count, pool_count_cmo, sizeof(pool_count)); 1701 1702 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1703 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; 1704 int error; 1705 1706 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, 1707 pool_count[i], pool_size[i], 1708 pool_active[i]); 1709 error = kobject_init_and_add(kobj, &ktype_veth_pool, 1710 &dev->dev.kobj, "pool%d", i); 1711 if (!error) 1712 kobject_uevent(kobj, KOBJ_ADD); 1713 } 1714 1715 netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); 1716 netdev_dbg(netdev, "registering netdev...\n"); 1717 1718 ibmveth_set_features(netdev, netdev->features); 1719 1720 rc = register_netdev(netdev); 1721 1722 if (rc) { 1723 netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); 1724 free_netdev(netdev); 1725 return rc; 1726 } 1727 1728 netdev_dbg(netdev, "registered\n"); 1729 1730 return 0; 1731 } 1732 1733 static int ibmveth_remove(struct vio_dev *dev) 1734 { 1735 struct net_device *netdev = dev_get_drvdata(&dev->dev); 1736 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1737 int i; 1738 1739 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) 1740 kobject_put(&adapter->rx_buff_pool[i].kobj); 1741 1742 unregister_netdev(netdev); 1743 1744 free_netdev(netdev); 1745 dev_set_drvdata(&dev->dev, NULL); 1746 1747 return 0; 1748 } 1749 1750 static struct attribute veth_active_attr; 1751 static struct attribute veth_num_attr; 1752 static struct attribute veth_size_attr; 1753 1754 static ssize_t veth_pool_show(struct kobject *kobj, 1755 struct attribute *attr, char *buf) 1756 { 1757 struct ibmveth_buff_pool *pool = container_of(kobj, 1758 struct ibmveth_buff_pool, 1759 kobj); 1760 1761 if (attr == &veth_active_attr) 1762 return sprintf(buf, "%d\n", pool->active); 1763 else if (attr == &veth_num_attr) 1764 return sprintf(buf, "%d\n", pool->size); 1765 else if (attr == &veth_size_attr) 1766 return sprintf(buf, "%d\n", pool->buff_size); 1767 return 0; 1768 } 1769 1770 static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, 1771 const char *buf, size_t count) 1772 { 1773 struct ibmveth_buff_pool *pool = container_of(kobj, 1774 struct ibmveth_buff_pool, 1775 kobj); 1776 struct net_device *netdev = dev_get_drvdata( 1777 container_of(kobj->parent, struct device, kobj)); 1778 struct ibmveth_adapter *adapter = netdev_priv(netdev); 1779 long value = simple_strtol(buf, NULL, 10); 1780 long rc; 1781 1782 if (attr == &veth_active_attr) { 1783 if (value && !pool->active) { 1784 if (netif_running(netdev)) { 1785 if (ibmveth_alloc_buffer_pool(pool)) { 1786 netdev_err(netdev, 1787 "unable to alloc pool\n"); 1788 return -ENOMEM; 1789 } 1790 pool->active = 1; 1791 adapter->pool_config = 1; 1792 ibmveth_close(netdev); 1793 adapter->pool_config = 0; 1794 if ((rc = ibmveth_open(netdev))) 1795 return rc; 1796 } else { 1797 pool->active = 1; 1798 } 1799 } else if (!value && pool->active) { 1800 int mtu = netdev->mtu + IBMVETH_BUFF_OH; 1801 int i; 1802 /* Make sure there is a buffer pool with buffers that 1803 can hold a packet of the size of the MTU */ 1804 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { 1805 if (pool == &adapter->rx_buff_pool[i]) 1806 continue; 1807 if (!adapter->rx_buff_pool[i].active) 1808 continue; 1809 if (mtu <= adapter->rx_buff_pool[i].buff_size) 1810 break; 1811 } 1812 1813 if (i == IBMVETH_NUM_BUFF_POOLS) { 1814 netdev_err(netdev, "no active pool >= MTU\n"); 1815 return -EPERM; 1816 } 1817 1818 if (netif_running(netdev)) { 1819 adapter->pool_config = 1; 1820 ibmveth_close(netdev); 1821 pool->active = 0; 1822 adapter->pool_config = 0; 1823 if ((rc = ibmveth_open(netdev))) 1824 return rc; 1825 } 1826 pool->active = 0; 1827 } 1828 } else if (attr == &veth_num_attr) { 1829 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { 1830 return -EINVAL; 1831 } else { 1832 if (netif_running(netdev)) { 1833 adapter->pool_config = 1; 1834 ibmveth_close(netdev); 1835 adapter->pool_config = 0; 1836 pool->size = value; 1837 if ((rc = ibmveth_open(netdev))) 1838 return rc; 1839 } else { 1840 pool->size = value; 1841 } 1842 } 1843 } else if (attr == &veth_size_attr) { 1844 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { 1845 return -EINVAL; 1846 } else { 1847 if (netif_running(netdev)) { 1848 adapter->pool_config = 1; 1849 ibmveth_close(netdev); 1850 adapter->pool_config = 0; 1851 pool->buff_size = value; 1852 if ((rc = ibmveth_open(netdev))) 1853 return rc; 1854 } else { 1855 pool->buff_size = value; 1856 } 1857 } 1858 } 1859 1860 /* kick the interrupt handler to allocate/deallocate pools */ 1861 ibmveth_interrupt(netdev->irq, netdev); 1862 return count; 1863 } 1864 1865 1866 #define ATTR(_name, _mode) \ 1867 struct attribute veth_##_name##_attr = { \ 1868 .name = __stringify(_name), .mode = _mode, \ 1869 }; 1870 1871 static ATTR(active, 0644); 1872 static ATTR(num, 0644); 1873 static ATTR(size, 0644); 1874 1875 static struct attribute *veth_pool_attrs[] = { 1876 &veth_active_attr, 1877 &veth_num_attr, 1878 &veth_size_attr, 1879 NULL, 1880 }; 1881 1882 static const struct sysfs_ops veth_pool_ops = { 1883 .show = veth_pool_show, 1884 .store = veth_pool_store, 1885 }; 1886 1887 static struct kobj_type ktype_veth_pool = { 1888 .release = NULL, 1889 .sysfs_ops = &veth_pool_ops, 1890 .default_attrs = veth_pool_attrs, 1891 }; 1892 1893 static int ibmveth_resume(struct device *dev) 1894 { 1895 struct net_device *netdev = dev_get_drvdata(dev); 1896 ibmveth_interrupt(netdev->irq, netdev); 1897 return 0; 1898 } 1899 1900 static const struct vio_device_id ibmveth_device_table[] = { 1901 { "network", "IBM,l-lan"}, 1902 { "", "" } 1903 }; 1904 MODULE_DEVICE_TABLE(vio, ibmveth_device_table); 1905 1906 static const struct dev_pm_ops ibmveth_pm_ops = { 1907 .resume = ibmveth_resume 1908 }; 1909 1910 static struct vio_driver ibmveth_driver = { 1911 .id_table = ibmveth_device_table, 1912 .probe = ibmveth_probe, 1913 .remove = ibmveth_remove, 1914 .get_desired_dma = ibmveth_get_desired_dma, 1915 .name = ibmveth_driver_name, 1916 .pm = &ibmveth_pm_ops, 1917 }; 1918 1919 static int __init ibmveth_module_init(void) 1920 { 1921 printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, 1922 ibmveth_driver_string, ibmveth_driver_version); 1923 1924 return vio_register_driver(&ibmveth_driver); 1925 } 1926 1927 static void __exit ibmveth_module_exit(void) 1928 { 1929 vio_unregister_driver(&ibmveth_driver); 1930 } 1931 1932 module_init(ibmveth_module_init); 1933 module_exit(ibmveth_module_exit); 1934