1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright(c) 2007-2010 Intel Corporation. All rights reserved. 24 */ 25 26 /* 27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 28 */ 29 30 #include "igb_sw.h" 31 32 static int igb_alloc_tbd_ring(igb_tx_ring_t *); 33 static void igb_free_tbd_ring(igb_tx_ring_t *); 34 static int igb_alloc_rbd_ring(igb_rx_data_t *); 35 static void igb_free_rbd_ring(igb_rx_data_t *); 36 static int igb_alloc_dma_buffer(igb_t *, dma_buffer_t *, size_t); 37 static int igb_alloc_tcb_lists(igb_tx_ring_t *); 38 static void igb_free_tcb_lists(igb_tx_ring_t *); 39 static int igb_alloc_rcb_lists(igb_rx_data_t *); 40 static void igb_free_rcb_lists(igb_rx_data_t *); 41 42 #ifdef __sparc 43 #define IGB_DMA_ALIGNMENT 0x0000000000002000ull 44 #else 45 #define IGB_DMA_ALIGNMENT 0x0000000000001000ull 46 #endif 47 48 /* 49 * DMA attributes for tx/rx descriptors 50 */ 51 static ddi_dma_attr_t igb_desc_dma_attr = { 52 DMA_ATTR_V0, /* version number */ 53 0x0000000000000000ull, /* low address */ 54 0xFFFFFFFFFFFFFFFFull, /* high address */ 55 0x00000000FFFFFFFFull, /* dma counter max */ 56 IGB_DMA_ALIGNMENT, /* alignment */ 57 0x00000FFF, /* burst sizes */ 58 0x00000001, /* minimum transfer size */ 59 0x00000000FFFFFFFFull, /* maximum transfer size */ 60 0xFFFFFFFFFFFFFFFFull, /* maximum segment size */ 61 1, /* scatter/gather list length */ 62 0x00000001, /* granularity */ 63 DDI_DMA_FLAGERR, /* DMA flags */ 64 }; 65 66 /* 67 * DMA attributes for tx/rx buffers 68 */ 69 static ddi_dma_attr_t igb_buf_dma_attr = { 70 DMA_ATTR_V0, /* version number */ 71 0x0000000000000000ull, /* low address */ 72 0xFFFFFFFFFFFFFFFFull, /* high address */ 73 0x00000000FFFFFFFFull, /* dma counter max */ 74 IGB_DMA_ALIGNMENT, /* alignment */ 75 0x00000FFF, /* burst sizes */ 76 0x00000001, /* minimum transfer size */ 77 0x00000000FFFFFFFFull, /* maximum transfer size */ 78 0xFFFFFFFFFFFFFFFFull, /* maximum segment size */ 79 1, /* scatter/gather list length */ 80 0x00000001, /* granularity */ 81 DDI_DMA_FLAGERR, /* DMA flags */ 82 }; 83 84 /* 85 * DMA attributes for transmit 86 */ 87 static ddi_dma_attr_t igb_tx_dma_attr = { 88 DMA_ATTR_V0, /* version number */ 89 0x0000000000000000ull, /* low address */ 90 0xFFFFFFFFFFFFFFFFull, /* high address */ 91 0x00000000FFFFFFFFull, /* dma counter max */ 92 1, /* alignment */ 93 0x00000FFF, /* burst sizes */ 94 0x00000001, /* minimum transfer size */ 95 0x00000000FFFFFFFFull, /* maximum transfer size */ 96 0xFFFFFFFFFFFFFFFFull, /* maximum segment size */ 97 MAX_COOKIE, /* scatter/gather list length */ 98 0x00000001, /* granularity */ 99 DDI_DMA_FLAGERR, /* DMA flags */ 100 }; 101 102 /* 103 * DMA access attributes for descriptors. 104 */ 105 static ddi_device_acc_attr_t igb_desc_acc_attr = { 106 DDI_DEVICE_ATTR_V0, 107 DDI_STRUCTURE_LE_ACC, 108 DDI_STRICTORDER_ACC 109 }; 110 111 /* 112 * DMA access attributes for buffers. 113 */ 114 static ddi_device_acc_attr_t igb_buf_acc_attr = { 115 DDI_DEVICE_ATTR_V0, 116 DDI_NEVERSWAP_ACC, 117 DDI_STRICTORDER_ACC 118 }; 119 120 121 /* 122 * igb_alloc_dma - Allocate DMA resources for all rx/tx rings 123 */ 124 int 125 igb_alloc_dma(igb_t *igb) 126 { 127 igb_rx_ring_t *rx_ring; 128 igb_rx_data_t *rx_data; 129 igb_tx_ring_t *tx_ring; 130 int i; 131 132 for (i = 0; i < igb->num_rx_rings; i++) { 133 /* 134 * Allocate receive desciptor ring and control block lists 135 */ 136 rx_ring = &igb->rx_rings[i]; 137 rx_data = rx_ring->rx_data; 138 139 if (igb_alloc_rbd_ring(rx_data) != IGB_SUCCESS) 140 goto alloc_dma_failure; 141 142 if (igb_alloc_rcb_lists(rx_data) != IGB_SUCCESS) 143 goto alloc_dma_failure; 144 } 145 146 for (i = 0; i < igb->num_tx_rings; i++) { 147 /* 148 * Allocate transmit desciptor ring and control block lists 149 */ 150 tx_ring = &igb->tx_rings[i]; 151 152 if (igb_alloc_tbd_ring(tx_ring) != IGB_SUCCESS) 153 goto alloc_dma_failure; 154 155 if (igb_alloc_tcb_lists(tx_ring) != IGB_SUCCESS) 156 goto alloc_dma_failure; 157 } 158 159 return (IGB_SUCCESS); 160 161 alloc_dma_failure: 162 igb_free_dma(igb); 163 164 return (IGB_FAILURE); 165 } 166 167 168 /* 169 * igb_free_dma - Free all the DMA resources of all rx/tx rings 170 */ 171 void 172 igb_free_dma(igb_t *igb) 173 { 174 igb_rx_ring_t *rx_ring; 175 igb_rx_data_t *rx_data; 176 igb_tx_ring_t *tx_ring; 177 int i; 178 179 /* 180 * Free DMA resources of rx rings 181 */ 182 for (i = 0; i < igb->num_rx_rings; i++) { 183 rx_ring = &igb->rx_rings[i]; 184 rx_data = rx_ring->rx_data; 185 186 igb_free_rbd_ring(rx_data); 187 igb_free_rcb_lists(rx_data); 188 } 189 190 /* 191 * Free DMA resources of tx rings 192 */ 193 for (i = 0; i < igb->num_tx_rings; i++) { 194 tx_ring = &igb->tx_rings[i]; 195 igb_free_tbd_ring(tx_ring); 196 igb_free_tcb_lists(tx_ring); 197 } 198 } 199 200 /* 201 * igb_alloc_tbd_ring - Memory allocation for the tx descriptors of one ring. 202 */ 203 static int 204 igb_alloc_tbd_ring(igb_tx_ring_t *tx_ring) 205 { 206 int ret; 207 size_t size; 208 size_t len; 209 uint_t cookie_num; 210 dev_info_t *devinfo; 211 ddi_dma_cookie_t cookie; 212 igb_t *igb = tx_ring->igb; 213 214 devinfo = igb->dip; 215 size = sizeof (union e1000_adv_tx_desc) * tx_ring->ring_size; 216 217 /* 218 * If tx head write-back is enabled, an extra tbd is allocated 219 * to save the head write-back value 220 */ 221 if (igb->tx_head_wb_enable) { 222 size += sizeof (union e1000_adv_tx_desc); 223 } 224 225 /* 226 * Allocate a DMA handle for the transmit descriptor 227 * memory area. 228 */ 229 ret = ddi_dma_alloc_handle(devinfo, &igb_desc_dma_attr, 230 DDI_DMA_DONTWAIT, NULL, 231 &tx_ring->tbd_area.dma_handle); 232 233 if (ret != DDI_SUCCESS) { 234 igb_log(igb, IGB_LOG_ERROR, 235 "Could not allocate tbd dma handle: %x", ret); 236 tx_ring->tbd_area.dma_handle = NULL; 237 238 return (IGB_FAILURE); 239 } 240 241 /* 242 * Allocate memory to DMA data to and from the transmit 243 * descriptors. 244 */ 245 ret = ddi_dma_mem_alloc(tx_ring->tbd_area.dma_handle, 246 size, &igb_desc_acc_attr, DDI_DMA_CONSISTENT, 247 DDI_DMA_DONTWAIT, NULL, 248 (caddr_t *)&tx_ring->tbd_area.address, 249 &len, &tx_ring->tbd_area.acc_handle); 250 251 if (ret != DDI_SUCCESS) { 252 igb_log(igb, IGB_LOG_ERROR, 253 "Could not allocate tbd dma memory: %x", ret); 254 tx_ring->tbd_area.acc_handle = NULL; 255 tx_ring->tbd_area.address = NULL; 256 if (tx_ring->tbd_area.dma_handle != NULL) { 257 ddi_dma_free_handle(&tx_ring->tbd_area.dma_handle); 258 tx_ring->tbd_area.dma_handle = NULL; 259 } 260 return (IGB_FAILURE); 261 } 262 263 /* 264 * Initialize the entire transmit buffer descriptor area to zero 265 */ 266 bzero(tx_ring->tbd_area.address, len); 267 268 /* 269 * Allocates DMA resources for the memory that was allocated by 270 * the ddi_dma_mem_alloc call. The DMA resources then get bound to the 271 * the memory address 272 */ 273 ret = ddi_dma_addr_bind_handle(tx_ring->tbd_area.dma_handle, 274 NULL, (caddr_t)tx_ring->tbd_area.address, 275 len, DDI_DMA_RDWR | DDI_DMA_CONSISTENT, 276 DDI_DMA_DONTWAIT, NULL, &cookie, &cookie_num); 277 278 if (ret != DDI_DMA_MAPPED) { 279 igb_log(igb, IGB_LOG_ERROR, 280 "Could not bind tbd dma resource: %x", ret); 281 tx_ring->tbd_area.dma_address = 0; 282 if (tx_ring->tbd_area.acc_handle != NULL) { 283 ddi_dma_mem_free(&tx_ring->tbd_area.acc_handle); 284 tx_ring->tbd_area.acc_handle = NULL; 285 tx_ring->tbd_area.address = NULL; 286 } 287 if (tx_ring->tbd_area.dma_handle != NULL) { 288 ddi_dma_free_handle(&tx_ring->tbd_area.dma_handle); 289 tx_ring->tbd_area.dma_handle = NULL; 290 } 291 return (IGB_FAILURE); 292 } 293 294 ASSERT(cookie_num == 1); 295 296 tx_ring->tbd_area.dma_address = cookie.dmac_laddress; 297 tx_ring->tbd_area.size = len; 298 299 tx_ring->tbd_ring = (union e1000_adv_tx_desc *)(uintptr_t) 300 tx_ring->tbd_area.address; 301 302 return (IGB_SUCCESS); 303 } 304 305 /* 306 * igb_free_tbd_ring - Free the tx descriptors of one ring. 307 */ 308 static void 309 igb_free_tbd_ring(igb_tx_ring_t *tx_ring) 310 { 311 if (tx_ring->tbd_area.dma_handle != NULL) { 312 (void) ddi_dma_unbind_handle(tx_ring->tbd_area.dma_handle); 313 } 314 if (tx_ring->tbd_area.acc_handle != NULL) { 315 ddi_dma_mem_free(&tx_ring->tbd_area.acc_handle); 316 tx_ring->tbd_area.acc_handle = NULL; 317 } 318 if (tx_ring->tbd_area.dma_handle != NULL) { 319 ddi_dma_free_handle(&tx_ring->tbd_area.dma_handle); 320 tx_ring->tbd_area.dma_handle = NULL; 321 } 322 tx_ring->tbd_area.address = NULL; 323 tx_ring->tbd_area.dma_address = 0; 324 tx_ring->tbd_area.size = 0; 325 326 tx_ring->tbd_ring = NULL; 327 } 328 329 int 330 igb_alloc_rx_ring_data(igb_rx_ring_t *rx_ring) 331 { 332 igb_rx_data_t *rx_data; 333 igb_t *igb = rx_ring->igb; 334 uint32_t rcb_count; 335 336 /* 337 * Allocate memory for software receive rings 338 */ 339 rx_data = kmem_zalloc(sizeof (igb_rx_data_t), KM_NOSLEEP); 340 341 if (rx_data == NULL) { 342 igb_log(igb, IGB_LOG_ERROR, 343 "Allocate software receive rings failed"); 344 return (IGB_FAILURE); 345 } 346 347 rx_data->rx_ring = rx_ring; 348 mutex_init(&rx_data->recycle_lock, NULL, 349 MUTEX_DRIVER, DDI_INTR_PRI(igb->intr_pri)); 350 351 rx_data->ring_size = igb->rx_ring_size; 352 rx_data->free_list_size = igb->rx_ring_size; 353 354 rx_data->rcb_head = 0; 355 rx_data->rcb_tail = 0; 356 rx_data->rcb_free = rx_data->free_list_size; 357 358 /* 359 * Allocate memory for the work list. 360 */ 361 rx_data->work_list = kmem_zalloc(sizeof (rx_control_block_t *) * 362 rx_data->ring_size, KM_NOSLEEP); 363 364 if (rx_data->work_list == NULL) { 365 igb_log(igb, IGB_LOG_ERROR, 366 "Could not allocate memory for rx work list"); 367 goto alloc_rx_data_failure; 368 } 369 370 /* 371 * Allocate memory for the free list. 372 */ 373 rx_data->free_list = kmem_zalloc(sizeof (rx_control_block_t *) * 374 rx_data->free_list_size, KM_NOSLEEP); 375 376 if (rx_data->free_list == NULL) { 377 igb_log(igb, IGB_LOG_ERROR, 378 "Cound not allocate memory for rx free list"); 379 goto alloc_rx_data_failure; 380 } 381 382 /* 383 * Allocate memory for the rx control blocks for work list and 384 * free list. 385 */ 386 rcb_count = rx_data->ring_size + rx_data->free_list_size; 387 rx_data->rcb_area = 388 kmem_zalloc(sizeof (rx_control_block_t) * rcb_count, 389 KM_NOSLEEP); 390 391 if (rx_data->rcb_area == NULL) { 392 igb_log(igb, IGB_LOG_ERROR, 393 "Cound not allocate memory for rx control blocks"); 394 goto alloc_rx_data_failure; 395 } 396 397 rx_ring->rx_data = rx_data; 398 return (IGB_SUCCESS); 399 400 alloc_rx_data_failure: 401 igb_free_rx_ring_data(rx_data); 402 return (IGB_FAILURE); 403 } 404 405 void 406 igb_free_rx_ring_data(igb_rx_data_t *rx_data) 407 { 408 uint32_t rcb_count; 409 410 if (rx_data == NULL) 411 return; 412 413 ASSERT(rx_data->rcb_pending == 0); 414 415 rcb_count = rx_data->ring_size + rx_data->free_list_size; 416 if (rx_data->rcb_area != NULL) { 417 kmem_free(rx_data->rcb_area, 418 sizeof (rx_control_block_t) * rcb_count); 419 rx_data->rcb_area = NULL; 420 } 421 422 if (rx_data->work_list != NULL) { 423 kmem_free(rx_data->work_list, 424 sizeof (rx_control_block_t *) * rx_data->ring_size); 425 rx_data->work_list = NULL; 426 } 427 428 if (rx_data->free_list != NULL) { 429 kmem_free(rx_data->free_list, 430 sizeof (rx_control_block_t *) * rx_data->free_list_size); 431 rx_data->free_list = NULL; 432 } 433 434 mutex_destroy(&rx_data->recycle_lock); 435 kmem_free(rx_data, sizeof (igb_rx_data_t)); 436 } 437 438 /* 439 * igb_alloc_rbd_ring - Memory allocation for the rx descriptors of one ring. 440 */ 441 static int 442 igb_alloc_rbd_ring(igb_rx_data_t *rx_data) 443 { 444 int ret; 445 size_t size; 446 size_t len; 447 uint_t cookie_num; 448 dev_info_t *devinfo; 449 ddi_dma_cookie_t cookie; 450 igb_t *igb = rx_data->rx_ring->igb; 451 452 devinfo = igb->dip; 453 size = sizeof (union e1000_adv_rx_desc) * rx_data->ring_size; 454 455 /* 456 * Allocate a new DMA handle for the receive descriptor 457 * memory area. 458 */ 459 ret = ddi_dma_alloc_handle(devinfo, &igb_desc_dma_attr, 460 DDI_DMA_DONTWAIT, NULL, 461 &rx_data->rbd_area.dma_handle); 462 463 if (ret != DDI_SUCCESS) { 464 igb_log(igb, IGB_LOG_ERROR, 465 "Could not allocate rbd dma handle: %x", ret); 466 rx_data->rbd_area.dma_handle = NULL; 467 return (IGB_FAILURE); 468 } 469 470 /* 471 * Allocate memory to DMA data to and from the receive 472 * descriptors. 473 */ 474 ret = ddi_dma_mem_alloc(rx_data->rbd_area.dma_handle, 475 size, &igb_desc_acc_attr, DDI_DMA_CONSISTENT, 476 DDI_DMA_DONTWAIT, NULL, 477 (caddr_t *)&rx_data->rbd_area.address, 478 &len, &rx_data->rbd_area.acc_handle); 479 480 if (ret != DDI_SUCCESS) { 481 igb_log(igb, IGB_LOG_ERROR, 482 "Could not allocate rbd dma memory: %x", ret); 483 rx_data->rbd_area.acc_handle = NULL; 484 rx_data->rbd_area.address = NULL; 485 if (rx_data->rbd_area.dma_handle != NULL) { 486 ddi_dma_free_handle(&rx_data->rbd_area.dma_handle); 487 rx_data->rbd_area.dma_handle = NULL; 488 } 489 return (IGB_FAILURE); 490 } 491 492 /* 493 * Initialize the entire transmit buffer descriptor area to zero 494 */ 495 bzero(rx_data->rbd_area.address, len); 496 497 /* 498 * Allocates DMA resources for the memory that was allocated by 499 * the ddi_dma_mem_alloc call. 500 */ 501 ret = ddi_dma_addr_bind_handle(rx_data->rbd_area.dma_handle, 502 NULL, (caddr_t)rx_data->rbd_area.address, 503 len, DDI_DMA_RDWR | DDI_DMA_CONSISTENT, 504 DDI_DMA_DONTWAIT, NULL, &cookie, &cookie_num); 505 506 if (ret != DDI_DMA_MAPPED) { 507 igb_log(igb, IGB_LOG_ERROR, 508 "Could not bind rbd dma resource: %x", ret); 509 rx_data->rbd_area.dma_address = 0; 510 if (rx_data->rbd_area.acc_handle != NULL) { 511 ddi_dma_mem_free(&rx_data->rbd_area.acc_handle); 512 rx_data->rbd_area.acc_handle = NULL; 513 rx_data->rbd_area.address = NULL; 514 } 515 if (rx_data->rbd_area.dma_handle != NULL) { 516 ddi_dma_free_handle(&rx_data->rbd_area.dma_handle); 517 rx_data->rbd_area.dma_handle = NULL; 518 } 519 return (IGB_FAILURE); 520 } 521 522 ASSERT(cookie_num == 1); 523 524 rx_data->rbd_area.dma_address = cookie.dmac_laddress; 525 rx_data->rbd_area.size = len; 526 527 rx_data->rbd_ring = (union e1000_adv_rx_desc *)(uintptr_t) 528 rx_data->rbd_area.address; 529 530 return (IGB_SUCCESS); 531 } 532 533 /* 534 * igb_free_rbd_ring - Free the rx descriptors of one ring. 535 */ 536 static void 537 igb_free_rbd_ring(igb_rx_data_t *rx_data) 538 { 539 if (rx_data->rbd_area.dma_handle != NULL) { 540 (void) ddi_dma_unbind_handle(rx_data->rbd_area.dma_handle); 541 } 542 if (rx_data->rbd_area.acc_handle != NULL) { 543 ddi_dma_mem_free(&rx_data->rbd_area.acc_handle); 544 rx_data->rbd_area.acc_handle = NULL; 545 } 546 if (rx_data->rbd_area.dma_handle != NULL) { 547 ddi_dma_free_handle(&rx_data->rbd_area.dma_handle); 548 rx_data->rbd_area.dma_handle = NULL; 549 } 550 rx_data->rbd_area.address = NULL; 551 rx_data->rbd_area.dma_address = 0; 552 rx_data->rbd_area.size = 0; 553 554 rx_data->rbd_ring = NULL; 555 } 556 557 558 /* 559 * igb_alloc_dma_buffer - Allocate DMA resources for a DMA buffer 560 */ 561 static int 562 igb_alloc_dma_buffer(igb_t *igb, 563 dma_buffer_t *buf, size_t size) 564 { 565 int ret; 566 dev_info_t *devinfo = igb->dip; 567 ddi_dma_cookie_t cookie; 568 size_t len; 569 uint_t cookie_num; 570 571 ret = ddi_dma_alloc_handle(devinfo, 572 &igb_buf_dma_attr, DDI_DMA_DONTWAIT, 573 NULL, &buf->dma_handle); 574 575 if (ret != DDI_SUCCESS) { 576 buf->dma_handle = NULL; 577 igb_log(igb, IGB_LOG_ERROR, 578 "Could not allocate dma buffer handle: %x", ret); 579 return (IGB_FAILURE); 580 } 581 582 ret = ddi_dma_mem_alloc(buf->dma_handle, 583 size, &igb_buf_acc_attr, DDI_DMA_STREAMING, 584 DDI_DMA_DONTWAIT, NULL, &buf->address, 585 &len, &buf->acc_handle); 586 587 if (ret != DDI_SUCCESS) { 588 buf->acc_handle = NULL; 589 buf->address = NULL; 590 if (buf->dma_handle != NULL) { 591 ddi_dma_free_handle(&buf->dma_handle); 592 buf->dma_handle = NULL; 593 } 594 igb_log(igb, IGB_LOG_ERROR, 595 "Could not allocate dma buffer memory: %x", ret); 596 return (IGB_FAILURE); 597 } 598 599 ret = ddi_dma_addr_bind_handle(buf->dma_handle, NULL, 600 buf->address, 601 len, DDI_DMA_RDWR | DDI_DMA_STREAMING, 602 DDI_DMA_DONTWAIT, NULL, &cookie, &cookie_num); 603 604 if (ret != DDI_DMA_MAPPED) { 605 buf->dma_address = 0; 606 if (buf->acc_handle != NULL) { 607 ddi_dma_mem_free(&buf->acc_handle); 608 buf->acc_handle = NULL; 609 buf->address = NULL; 610 } 611 if (buf->dma_handle != NULL) { 612 ddi_dma_free_handle(&buf->dma_handle); 613 buf->dma_handle = NULL; 614 } 615 igb_log(igb, IGB_LOG_ERROR, 616 "Could not bind dma buffer handle: %x", ret); 617 return (IGB_FAILURE); 618 } 619 620 ASSERT(cookie_num == 1); 621 622 buf->dma_address = cookie.dmac_laddress; 623 buf->size = len; 624 buf->len = 0; 625 626 return (IGB_SUCCESS); 627 } 628 629 /* 630 * igb_free_dma_buffer - Free one allocated area of dma memory and handle 631 */ 632 void 633 igb_free_dma_buffer(dma_buffer_t *buf) 634 { 635 if (buf->dma_handle != NULL) { 636 (void) ddi_dma_unbind_handle(buf->dma_handle); 637 buf->dma_address = 0; 638 } else { 639 return; 640 } 641 642 if (buf->acc_handle != NULL) { 643 ddi_dma_mem_free(&buf->acc_handle); 644 buf->acc_handle = NULL; 645 buf->address = NULL; 646 } 647 648 if (buf->dma_handle != NULL) { 649 ddi_dma_free_handle(&buf->dma_handle); 650 buf->dma_handle = NULL; 651 } 652 653 buf->size = 0; 654 buf->len = 0; 655 } 656 657 /* 658 * igb_alloc_tcb_lists - Memory allocation for the transmit control bolcks 659 * of one ring. 660 */ 661 static int 662 igb_alloc_tcb_lists(igb_tx_ring_t *tx_ring) 663 { 664 int i; 665 int ret; 666 tx_control_block_t *tcb; 667 dma_buffer_t *tx_buf; 668 igb_t *igb = tx_ring->igb; 669 dev_info_t *devinfo = igb->dip; 670 671 /* 672 * Allocate memory for the work list. 673 */ 674 tx_ring->work_list = kmem_zalloc(sizeof (tx_control_block_t *) * 675 tx_ring->ring_size, KM_NOSLEEP); 676 677 if (tx_ring->work_list == NULL) { 678 igb_log(igb, IGB_LOG_ERROR, 679 "Cound not allocate memory for tx work list"); 680 return (IGB_FAILURE); 681 } 682 683 /* 684 * Allocate memory for the free list. 685 */ 686 tx_ring->free_list = kmem_zalloc(sizeof (tx_control_block_t *) * 687 tx_ring->free_list_size, KM_NOSLEEP); 688 689 if (tx_ring->free_list == NULL) { 690 kmem_free(tx_ring->work_list, 691 sizeof (tx_control_block_t *) * tx_ring->ring_size); 692 tx_ring->work_list = NULL; 693 694 igb_log(igb, IGB_LOG_ERROR, 695 "Cound not allocate memory for tx free list"); 696 return (IGB_FAILURE); 697 } 698 699 /* 700 * Allocate memory for the tx control blocks of free list. 701 */ 702 tx_ring->tcb_area = 703 kmem_zalloc(sizeof (tx_control_block_t) * 704 tx_ring->free_list_size, KM_NOSLEEP); 705 706 if (tx_ring->tcb_area == NULL) { 707 kmem_free(tx_ring->work_list, 708 sizeof (tx_control_block_t *) * tx_ring->ring_size); 709 tx_ring->work_list = NULL; 710 711 kmem_free(tx_ring->free_list, 712 sizeof (tx_control_block_t *) * tx_ring->free_list_size); 713 tx_ring->free_list = NULL; 714 715 igb_log(igb, IGB_LOG_ERROR, 716 "Cound not allocate memory for tx control blocks"); 717 return (IGB_FAILURE); 718 } 719 720 /* 721 * Allocate dma memory for the tx control block of free list. 722 */ 723 tcb = tx_ring->tcb_area; 724 for (i = 0; i < tx_ring->free_list_size; i++, tcb++) { 725 ASSERT(tcb != NULL); 726 727 tx_ring->free_list[i] = tcb; 728 729 /* 730 * Pre-allocate dma handles for transmit. These dma handles 731 * will be dynamically bound to the data buffers passed down 732 * from the upper layers at the time of transmitting. 733 */ 734 ret = ddi_dma_alloc_handle(devinfo, 735 &igb_tx_dma_attr, 736 DDI_DMA_DONTWAIT, NULL, 737 &tcb->tx_dma_handle); 738 if (ret != DDI_SUCCESS) { 739 tcb->tx_dma_handle = NULL; 740 igb_log(igb, IGB_LOG_ERROR, 741 "Could not allocate tx dma handle: %x", ret); 742 goto alloc_tcb_lists_fail; 743 } 744 745 /* 746 * Pre-allocate transmit buffers for packets that the 747 * size is less than bcopy_thresh. 748 */ 749 tx_buf = &tcb->tx_buf; 750 751 ret = igb_alloc_dma_buffer(igb, 752 tx_buf, igb->tx_buf_size); 753 754 if (ret != IGB_SUCCESS) { 755 ASSERT(tcb->tx_dma_handle != NULL); 756 ddi_dma_free_handle(&tcb->tx_dma_handle); 757 tcb->tx_dma_handle = NULL; 758 igb_log(igb, IGB_LOG_ERROR, 759 "Allocate tx dma buffer failed"); 760 goto alloc_tcb_lists_fail; 761 } 762 tcb->last_index = MAX_TX_RING_SIZE; 763 } 764 765 return (IGB_SUCCESS); 766 767 alloc_tcb_lists_fail: 768 igb_free_tcb_lists(tx_ring); 769 770 return (IGB_FAILURE); 771 } 772 773 /* 774 * igb_free_tcb_lists - Release the memory allocated for 775 * the transmit control bolcks of one ring. 776 */ 777 static void 778 igb_free_tcb_lists(igb_tx_ring_t *tx_ring) 779 { 780 int i; 781 tx_control_block_t *tcb; 782 783 tcb = tx_ring->tcb_area; 784 if (tcb == NULL) 785 return; 786 787 for (i = 0; i < tx_ring->free_list_size; i++, tcb++) { 788 ASSERT(tcb != NULL); 789 790 /* Free the tx dma handle for dynamical binding */ 791 if (tcb->tx_dma_handle != NULL) { 792 ddi_dma_free_handle(&tcb->tx_dma_handle); 793 tcb->tx_dma_handle = NULL; 794 } else { 795 /* 796 * If the dma handle is NULL, then we don't 797 * have to check the remaining. 798 */ 799 break; 800 } 801 802 igb_free_dma_buffer(&tcb->tx_buf); 803 } 804 805 if (tx_ring->tcb_area != NULL) { 806 kmem_free(tx_ring->tcb_area, 807 sizeof (tx_control_block_t) * tx_ring->free_list_size); 808 tx_ring->tcb_area = NULL; 809 } 810 811 if (tx_ring->work_list != NULL) { 812 kmem_free(tx_ring->work_list, 813 sizeof (tx_control_block_t *) * tx_ring->ring_size); 814 tx_ring->work_list = NULL; 815 } 816 817 if (tx_ring->free_list != NULL) { 818 kmem_free(tx_ring->free_list, 819 sizeof (tx_control_block_t *) * tx_ring->free_list_size); 820 tx_ring->free_list = NULL; 821 } 822 } 823 824 /* 825 * igb_alloc_rcb_lists - Memory allocation for the receive control blocks 826 * of one ring. 827 */ 828 static int 829 igb_alloc_rcb_lists(igb_rx_data_t *rx_data) 830 { 831 int i; 832 int ret; 833 rx_control_block_t *rcb; 834 igb_t *igb = rx_data->rx_ring->igb; 835 dma_buffer_t *rx_buf; 836 uint32_t rcb_count; 837 838 /* 839 * Allocate memory for the rx control blocks for work list and 840 * free list. 841 */ 842 rcb_count = rx_data->ring_size + rx_data->free_list_size; 843 rcb = rx_data->rcb_area; 844 845 for (i = 0; i < rcb_count; i++, rcb++) { 846 ASSERT(rcb != NULL); 847 848 if (i < rx_data->ring_size) { 849 /* Attach the rx control block to the work list */ 850 rx_data->work_list[i] = rcb; 851 } else { 852 /* Attach the rx control block to the free list */ 853 rx_data->free_list[i - rx_data->ring_size] = rcb; 854 } 855 856 rx_buf = &rcb->rx_buf; 857 ret = igb_alloc_dma_buffer(igb, 858 rx_buf, igb->rx_buf_size); 859 860 if (ret != IGB_SUCCESS) { 861 igb_log(igb, IGB_LOG_ERROR, 862 "Allocate rx dma buffer failed"); 863 goto alloc_rcb_lists_fail; 864 } 865 866 rx_buf->size -= IPHDR_ALIGN_ROOM; 867 rx_buf->address += IPHDR_ALIGN_ROOM; 868 rx_buf->dma_address += IPHDR_ALIGN_ROOM; 869 870 rcb->ref_cnt = 1; 871 rcb->rx_data = (igb_rx_data_t *)rx_data; 872 rcb->free_rtn.free_func = igb_rx_recycle; 873 rcb->free_rtn.free_arg = (char *)rcb; 874 875 rcb->mp = desballoc((unsigned char *) 876 rx_buf->address, 877 rx_buf->size, 878 0, &rcb->free_rtn); 879 } 880 881 return (IGB_SUCCESS); 882 883 alloc_rcb_lists_fail: 884 igb_free_rcb_lists(rx_data); 885 886 return (IGB_FAILURE); 887 } 888 889 /* 890 * igb_free_rcb_lists - Free the receive control blocks of one ring. 891 */ 892 static void 893 igb_free_rcb_lists(igb_rx_data_t *rx_data) 894 { 895 igb_t *igb; 896 rx_control_block_t *rcb; 897 uint32_t rcb_count; 898 uint32_t ref_cnt; 899 int i; 900 901 igb = rx_data->rx_ring->igb; 902 903 mutex_enter(&igb->rx_pending_lock); 904 905 rcb = rx_data->rcb_area; 906 rcb_count = rx_data->ring_size + rx_data->free_list_size; 907 908 for (i = 0; i < rcb_count; i++, rcb++) { 909 ASSERT(rcb != NULL); 910 911 ref_cnt = atomic_dec_32_nv(&rcb->ref_cnt); 912 if (ref_cnt == 0) { 913 if (rcb->mp != NULL) { 914 freemsg(rcb->mp); 915 rcb->mp = NULL; 916 } 917 igb_free_dma_buffer(&rcb->rx_buf); 918 } else { 919 atomic_inc_32(&rx_data->rcb_pending); 920 atomic_inc_32(&igb->rcb_pending); 921 } 922 } 923 924 mutex_exit(&igb->rx_pending_lock); 925 } 926 927 void 928 igb_set_fma_flags(int dma_flag) 929 { 930 if (dma_flag) { 931 igb_tx_dma_attr.dma_attr_flags = DDI_DMA_FLAGERR; 932 igb_buf_dma_attr.dma_attr_flags = DDI_DMA_FLAGERR; 933 igb_desc_dma_attr.dma_attr_flags = DDI_DMA_FLAGERR; 934 } else { 935 igb_tx_dma_attr.dma_attr_flags = 0; 936 igb_buf_dma_attr.dma_attr_flags = 0; 937 igb_desc_dma_attr.dma_attr_flags = 0; 938 } 939 } 940