1/* 2 * PS3 address space management. 3 * 4 * Copyright (C) 2006 Sony Computer Entertainment Inc. 5 * Copyright 2006 Sony Corp. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; version 2 of the License. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21#include <linux/kernel.h> 22#include <linux/module.h> 23#include <linux/memory_hotplug.h> 24#include <linux/memblock.h> 25#include <linux/slab.h> 26 27#include <asm/cell-regs.h> 28#include <asm/firmware.h> 29#include <asm/prom.h> 30#include <asm/udbg.h> 31#include <asm/lv1call.h> 32 33#include "platform.h" 34 35#if defined(DEBUG) 36#define DBG udbg_printf 37#else 38#define DBG pr_devel 39#endif 40 41enum { 42#if defined(CONFIG_PS3_DYNAMIC_DMA) 43 USE_DYNAMIC_DMA = 1, 44#else 45 USE_DYNAMIC_DMA = 0, 46#endif 47}; 48 49enum { 50 PAGE_SHIFT_4K = 12U, 51 PAGE_SHIFT_64K = 16U, 52 PAGE_SHIFT_16M = 24U, 53}; 54 55static unsigned long make_page_sizes(unsigned long a, unsigned long b) 56{ 57 return (a << 56) | (b << 48); 58} 59 60enum { 61 ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04, 62 ALLOCATE_MEMORY_ADDR_ZERO = 0X08, 63}; 64 65/* valid htab sizes are {18,19,20} = 256K, 512K, 1M */ 66 67enum { 68 HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */ 69 HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */ 70}; 71 72/*============================================================================*/ 73/* virtual address space routines */ 74/*============================================================================*/ 75 76/** 77 * struct mem_region - memory region structure 78 * @base: base address 79 * @size: size in bytes 80 * @offset: difference between base and rm.size 81 */ 82 83struct mem_region { 84 u64 base; 85 u64 size; 86 unsigned long offset; 87}; 88 89/** 90 * struct map - address space state variables holder 91 * @total: total memory available as reported by HV 92 * @vas_id - HV virtual address space id 93 * @htab_size: htab size in bytes 94 * 95 * The HV virtual address space (vas) allows for hotplug memory regions. 96 * Memory regions can be created and destroyed in the vas at runtime. 97 * @rm: real mode (bootmem) region 98 * @r1: hotplug memory region(s) 99 * 100 * ps3 addresses 101 * virt_addr: a cpu 'translated' effective address 102 * phys_addr: an address in what Linux thinks is the physical address space 103 * lpar_addr: an address in the HV virtual address space 104 * bus_addr: an io controller 'translated' address on a device bus 105 */ 106 107struct map { 108 u64 total; 109 u64 vas_id; 110 u64 htab_size; 111 struct mem_region rm; 112 struct mem_region r1; 113}; 114 115#define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) 116static void __maybe_unused _debug_dump_map(const struct map *m, 117 const char *func, int line) 118{ 119 DBG("%s:%d: map.total = %llxh\n", func, line, m->total); 120 DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size); 121 DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id); 122 DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size); 123 DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base); 124 DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset); 125 DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size); 126} 127 128static struct map map; 129 130/** 131 * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address 132 * @phys_addr: linux physical address 133 */ 134 135unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr) 136{ 137 BUG_ON(is_kernel_addr(phys_addr)); 138 return (phys_addr < map.rm.size || phys_addr >= map.total) 139 ? phys_addr : phys_addr + map.r1.offset; 140} 141 142EXPORT_SYMBOL(ps3_mm_phys_to_lpar); 143 144/** 145 * ps3_mm_vas_create - create the virtual address space 146 */ 147 148void __init ps3_mm_vas_create(unsigned long* htab_size) 149{ 150 int result; 151 u64 start_address; 152 u64 size; 153 u64 access_right; 154 u64 max_page_size; 155 u64 flags; 156 157 result = lv1_query_logical_partition_address_region_info(0, 158 &start_address, &size, &access_right, &max_page_size, 159 &flags); 160 161 if (result) { 162 DBG("%s:%d: lv1_query_logical_partition_address_region_info " 163 "failed: %s\n", __func__, __LINE__, 164 ps3_result(result)); 165 goto fail; 166 } 167 168 if (max_page_size < PAGE_SHIFT_16M) { 169 DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__, 170 max_page_size); 171 goto fail; 172 } 173 174 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX); 175 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN); 176 177 result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE, 178 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K), 179 &map.vas_id, &map.htab_size); 180 181 if (result) { 182 DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n", 183 __func__, __LINE__, ps3_result(result)); 184 goto fail; 185 } 186 187 result = lv1_select_virtual_address_space(map.vas_id); 188 189 if (result) { 190 DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n", 191 __func__, __LINE__, ps3_result(result)); 192 goto fail; 193 } 194 195 *htab_size = map.htab_size; 196 197 debug_dump_map(&map); 198 199 return; 200 201fail: 202 panic("ps3_mm_vas_create failed"); 203} 204 205/** 206 * ps3_mm_vas_destroy - 207 */ 208 209void ps3_mm_vas_destroy(void) 210{ 211 int result; 212 213 DBG("%s:%d: map.vas_id = %llu\n", __func__, __LINE__, map.vas_id); 214 215 if (map.vas_id) { 216 result = lv1_select_virtual_address_space(0); 217 BUG_ON(result); 218 result = lv1_destruct_virtual_address_space(map.vas_id); 219 BUG_ON(result); 220 map.vas_id = 0; 221 } 222} 223 224/*============================================================================*/ 225/* memory hotplug routines */ 226/*============================================================================*/ 227 228/** 229 * ps3_mm_region_create - create a memory region in the vas 230 * @r: pointer to a struct mem_region to accept initialized values 231 * @size: requested region size 232 * 233 * This implementation creates the region with the vas large page size. 234 * @size is rounded down to a multiple of the vas large page size. 235 */ 236 237static int ps3_mm_region_create(struct mem_region *r, unsigned long size) 238{ 239 int result; 240 u64 muid; 241 242 r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M); 243 244 DBG("%s:%d requested %lxh\n", __func__, __LINE__, size); 245 DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size); 246 DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__, 247 size - r->size, (size - r->size) / 1024 / 1024); 248 249 if (r->size == 0) { 250 DBG("%s:%d: size == 0\n", __func__, __LINE__); 251 result = -1; 252 goto zero_region; 253 } 254 255 result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0, 256 ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid); 257 258 if (result || r->base < map.rm.size) { 259 DBG("%s:%d: lv1_allocate_memory failed: %s\n", 260 __func__, __LINE__, ps3_result(result)); 261 goto zero_region; 262 } 263 264 r->offset = r->base - map.rm.size; 265 return result; 266 267zero_region: 268 r->size = r->base = r->offset = 0; 269 return result; 270} 271 272/** 273 * ps3_mm_region_destroy - destroy a memory region 274 * @r: pointer to struct mem_region 275 */ 276 277static void ps3_mm_region_destroy(struct mem_region *r) 278{ 279 int result; 280 281 DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base); 282 if (r->base) { 283 result = lv1_release_memory(r->base); 284 BUG_ON(result); 285 r->size = r->base = r->offset = 0; 286 map.total = map.rm.size; 287 } 288} 289 290/** 291 * ps3_mm_add_memory - hot add memory 292 */ 293 294static int __init ps3_mm_add_memory(void) 295{ 296 int result; 297 unsigned long start_addr; 298 unsigned long start_pfn; 299 unsigned long nr_pages; 300 301 if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) 302 return -ENODEV; 303 304 BUG_ON(!mem_init_done); 305 306 start_addr = map.rm.size; 307 start_pfn = start_addr >> PAGE_SHIFT; 308 nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT; 309 310 DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n", 311 __func__, __LINE__, start_addr, start_pfn, nr_pages); 312 313 result = add_memory(0, start_addr, map.r1.size); 314 315 if (result) { 316 pr_err("%s:%d: add_memory failed: (%d)\n", 317 __func__, __LINE__, result); 318 return result; 319 } 320 321 memblock_add(start_addr, map.r1.size); 322 memblock_analyze(); 323 324 result = online_pages(start_pfn, nr_pages); 325 326 if (result) 327 pr_err("%s:%d: online_pages failed: (%d)\n", 328 __func__, __LINE__, result); 329 330 return result; 331} 332 333device_initcall(ps3_mm_add_memory); 334 335/*============================================================================*/ 336/* dma routines */ 337/*============================================================================*/ 338 339/** 340 * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address. 341 * @r: pointer to dma region structure 342 * @lpar_addr: HV lpar address 343 */ 344 345static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r, 346 unsigned long lpar_addr) 347{ 348 if (lpar_addr >= map.rm.size) 349 lpar_addr -= map.r1.offset; 350 BUG_ON(lpar_addr < r->offset); 351 BUG_ON(lpar_addr >= r->offset + r->len); 352 return r->bus_addr + lpar_addr - r->offset; 353} 354 355#define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) 356static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r, 357 const char *func, int line) 358{ 359 DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id, 360 r->dev->dev_id); 361 DBG("%s:%d: page_size %u\n", func, line, r->page_size); 362 DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr); 363 DBG("%s:%d: len %lxh\n", func, line, r->len); 364 DBG("%s:%d: offset %lxh\n", func, line, r->offset); 365} 366 367 /** 368 * dma_chunk - A chunk of dma pages mapped by the io controller. 369 * @region - The dma region that owns this chunk. 370 * @lpar_addr: Starting lpar address of the area to map. 371 * @bus_addr: Starting ioc bus address of the area to map. 372 * @len: Length in bytes of the area to map. 373 * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the 374 * list of all chuncks owned by the region. 375 * 376 * This implementation uses a very simple dma page manager 377 * based on the dma_chunk structure. This scheme assumes 378 * that all drivers use very well behaved dma ops. 379 */ 380 381struct dma_chunk { 382 struct ps3_dma_region *region; 383 unsigned long lpar_addr; 384 unsigned long bus_addr; 385 unsigned long len; 386 struct list_head link; 387 unsigned int usage_count; 388}; 389 390#define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__) 391static void _dma_dump_chunk (const struct dma_chunk* c, const char* func, 392 int line) 393{ 394 DBG("%s:%d: r.dev %llu:%llu\n", func, line, 395 c->region->dev->bus_id, c->region->dev->dev_id); 396 DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr); 397 DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size); 398 DBG("%s:%d: r.len %lxh\n", func, line, c->region->len); 399 DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset); 400 DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr); 401 DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr); 402 DBG("%s:%d: c.len %lxh\n", func, line, c->len); 403} 404 405static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r, 406 unsigned long bus_addr, unsigned long len) 407{ 408 struct dma_chunk *c; 409 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); 410 unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus, 411 1 << r->page_size); 412 413 list_for_each_entry(c, &r->chunk_list.head, link) { 414 /* intersection */ 415 if (aligned_bus >= c->bus_addr && 416 aligned_bus + aligned_len <= c->bus_addr + c->len) 417 return c; 418 419 /* below */ 420 if (aligned_bus + aligned_len <= c->bus_addr) 421 continue; 422 423 /* above */ 424 if (aligned_bus >= c->bus_addr + c->len) 425 continue; 426 427 /* we don't handle the multi-chunk case for now */ 428 dma_dump_chunk(c); 429 BUG(); 430 } 431 return NULL; 432} 433 434static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r, 435 unsigned long lpar_addr, unsigned long len) 436{ 437 struct dma_chunk *c; 438 unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size); 439 unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar, 440 1 << r->page_size); 441 442 list_for_each_entry(c, &r->chunk_list.head, link) { 443 /* intersection */ 444 if (c->lpar_addr <= aligned_lpar && 445 aligned_lpar < c->lpar_addr + c->len) { 446 if (aligned_lpar + aligned_len <= c->lpar_addr + c->len) 447 return c; 448 else { 449 dma_dump_chunk(c); 450 BUG(); 451 } 452 } 453 /* below */ 454 if (aligned_lpar + aligned_len <= c->lpar_addr) { 455 continue; 456 } 457 /* above */ 458 if (c->lpar_addr + c->len <= aligned_lpar) { 459 continue; 460 } 461 } 462 return NULL; 463} 464 465static int dma_sb_free_chunk(struct dma_chunk *c) 466{ 467 int result = 0; 468 469 if (c->bus_addr) { 470 result = lv1_unmap_device_dma_region(c->region->dev->bus_id, 471 c->region->dev->dev_id, c->bus_addr, c->len); 472 BUG_ON(result); 473 } 474 475 kfree(c); 476 return result; 477} 478 479static int dma_ioc0_free_chunk(struct dma_chunk *c) 480{ 481 int result = 0; 482 int iopage; 483 unsigned long offset; 484 struct ps3_dma_region *r = c->region; 485 486 DBG("%s:start\n", __func__); 487 for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) { 488 offset = (1 << r->page_size) * iopage; 489 /* put INVALID entry */ 490 result = lv1_put_iopte(0, 491 c->bus_addr + offset, 492 c->lpar_addr + offset, 493 r->ioid, 494 0); 495 DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__, 496 c->bus_addr + offset, 497 c->lpar_addr + offset, 498 r->ioid); 499 500 if (result) { 501 DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__, 502 __LINE__, ps3_result(result)); 503 } 504 } 505 kfree(c); 506 DBG("%s:end\n", __func__); 507 return result; 508} 509 510/** 511 * dma_sb_map_pages - Maps dma pages into the io controller bus address space. 512 * @r: Pointer to a struct ps3_dma_region. 513 * @phys_addr: Starting physical address of the area to map. 514 * @len: Length in bytes of the area to map. 515 * c_out: A pointer to receive an allocated struct dma_chunk for this area. 516 * 517 * This is the lowest level dma mapping routine, and is the one that will 518 * make the HV call to add the pages into the io controller address space. 519 */ 520 521static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, 522 unsigned long len, struct dma_chunk **c_out, u64 iopte_flag) 523{ 524 int result; 525 struct dma_chunk *c; 526 527 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); 528 529 if (!c) { 530 result = -ENOMEM; 531 goto fail_alloc; 532 } 533 534 c->region = r; 535 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); 536 c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr); 537 c->len = len; 538 539 BUG_ON(iopte_flag != 0xf800000000000000UL); 540 result = lv1_map_device_dma_region(c->region->dev->bus_id, 541 c->region->dev->dev_id, c->lpar_addr, 542 c->bus_addr, c->len, iopte_flag); 543 if (result) { 544 DBG("%s:%d: lv1_map_device_dma_region failed: %s\n", 545 __func__, __LINE__, ps3_result(result)); 546 goto fail_map; 547 } 548 549 list_add(&c->link, &r->chunk_list.head); 550 551 *c_out = c; 552 return 0; 553 554fail_map: 555 kfree(c); 556fail_alloc: 557 *c_out = NULL; 558 DBG(" <- %s:%d\n", __func__, __LINE__); 559 return result; 560} 561 562static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, 563 unsigned long len, struct dma_chunk **c_out, 564 u64 iopte_flag) 565{ 566 int result; 567 struct dma_chunk *c, *last; 568 int iopage, pages; 569 unsigned long offset; 570 571 DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__, 572 phys_addr, ps3_mm_phys_to_lpar(phys_addr), len); 573 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); 574 575 if (!c) { 576 result = -ENOMEM; 577 goto fail_alloc; 578 } 579 580 c->region = r; 581 c->len = len; 582 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); 583 /* allocate IO address */ 584 if (list_empty(&r->chunk_list.head)) { 585 /* first one */ 586 c->bus_addr = r->bus_addr; 587 } else { 588 /* derive from last bus addr*/ 589 last = list_entry(r->chunk_list.head.next, 590 struct dma_chunk, link); 591 c->bus_addr = last->bus_addr + last->len; 592 DBG("%s: last bus=%#lx, len=%#lx\n", __func__, 593 last->bus_addr, last->len); 594 } 595 596 597 /* build ioptes for the area */ 598 pages = len >> r->page_size; 599 DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__, 600 r->page_size, r->len, pages, iopte_flag); 601 for (iopage = 0; iopage < pages; iopage++) { 602 offset = (1 << r->page_size) * iopage; 603 result = lv1_put_iopte(0, 604 c->bus_addr + offset, 605 c->lpar_addr + offset, 606 r->ioid, 607 iopte_flag); 608 if (result) { 609 pr_warning("%s:%d: lv1_put_iopte failed: %s\n", 610 __func__, __LINE__, ps3_result(result)); 611 goto fail_map; 612 } 613 DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__, 614 iopage, c->bus_addr + offset, c->lpar_addr + offset, 615 r->ioid); 616 } 617 618 /* be sure that last allocated one is inserted at head */ 619 list_add(&c->link, &r->chunk_list.head); 620 621 *c_out = c; 622 DBG("%s: end\n", __func__); 623 return 0; 624 625fail_map: 626 for (iopage--; 0 <= iopage; iopage--) { 627 lv1_put_iopte(0, 628 c->bus_addr + offset, 629 c->lpar_addr + offset, 630 r->ioid, 631 0); 632 } 633 kfree(c); 634fail_alloc: 635 *c_out = NULL; 636 return result; 637} 638 639/** 640 * dma_sb_region_create - Create a device dma region. 641 * @r: Pointer to a struct ps3_dma_region. 642 * 643 * This is the lowest level dma region create routine, and is the one that 644 * will make the HV call to create the region. 645 */ 646 647static int dma_sb_region_create(struct ps3_dma_region *r) 648{ 649 int result; 650 u64 bus_addr; 651 652 DBG(" -> %s:%d:\n", __func__, __LINE__); 653 654 BUG_ON(!r); 655 656 if (!r->dev->bus_id) { 657 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, 658 r->dev->bus_id, r->dev->dev_id); 659 return 0; 660 } 661 662 DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__, 663 __LINE__, r->len, r->page_size, r->offset); 664 665 BUG_ON(!r->len); 666 BUG_ON(!r->page_size); 667 BUG_ON(!r->region_ops); 668 669 INIT_LIST_HEAD(&r->chunk_list.head); 670 spin_lock_init(&r->chunk_list.lock); 671 672 result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id, 673 roundup_pow_of_two(r->len), r->page_size, r->region_type, 674 &bus_addr); 675 r->bus_addr = bus_addr; 676 677 if (result) { 678 DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n", 679 __func__, __LINE__, ps3_result(result)); 680 r->len = r->bus_addr = 0; 681 } 682 683 return result; 684} 685 686static int dma_ioc0_region_create(struct ps3_dma_region *r) 687{ 688 int result; 689 u64 bus_addr; 690 691 INIT_LIST_HEAD(&r->chunk_list.head); 692 spin_lock_init(&r->chunk_list.lock); 693 694 result = lv1_allocate_io_segment(0, 695 r->len, 696 r->page_size, 697 &bus_addr); 698 r->bus_addr = bus_addr; 699 if (result) { 700 DBG("%s:%d: lv1_allocate_io_segment failed: %s\n", 701 __func__, __LINE__, ps3_result(result)); 702 r->len = r->bus_addr = 0; 703 } 704 DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__, 705 r->len, r->page_size, r->bus_addr); 706 return result; 707} 708 709/** 710 * dma_region_free - Free a device dma region. 711 * @r: Pointer to a struct ps3_dma_region. 712 * 713 * This is the lowest level dma region free routine, and is the one that 714 * will make the HV call to free the region. 715 */ 716 717static int dma_sb_region_free(struct ps3_dma_region *r) 718{ 719 int result; 720 struct dma_chunk *c; 721 struct dma_chunk *tmp; 722 723 BUG_ON(!r); 724 725 if (!r->dev->bus_id) { 726 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, 727 r->dev->bus_id, r->dev->dev_id); 728 return 0; 729 } 730 731 list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { 732 list_del(&c->link); 733 dma_sb_free_chunk(c); 734 } 735 736 result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id, 737 r->bus_addr); 738 739 if (result) 740 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", 741 __func__, __LINE__, ps3_result(result)); 742 743 r->bus_addr = 0; 744 745 return result; 746} 747 748static int dma_ioc0_region_free(struct ps3_dma_region *r) 749{ 750 int result; 751 struct dma_chunk *c, *n; 752 753 DBG("%s: start\n", __func__); 754 list_for_each_entry_safe(c, n, &r->chunk_list.head, link) { 755 list_del(&c->link); 756 dma_ioc0_free_chunk(c); 757 } 758 759 result = lv1_release_io_segment(0, r->bus_addr); 760 761 if (result) 762 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", 763 __func__, __LINE__, ps3_result(result)); 764 765 r->bus_addr = 0; 766 DBG("%s: end\n", __func__); 767 768 return result; 769} 770 771/** 772 * dma_sb_map_area - Map an area of memory into a device dma region. 773 * @r: Pointer to a struct ps3_dma_region. 774 * @virt_addr: Starting virtual address of the area to map. 775 * @len: Length in bytes of the area to map. 776 * @bus_addr: A pointer to return the starting ioc bus address of the area to 777 * map. 778 * 779 * This is the common dma mapping routine. 780 */ 781 782static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr, 783 unsigned long len, dma_addr_t *bus_addr, 784 u64 iopte_flag) 785{ 786 int result; 787 unsigned long flags; 788 struct dma_chunk *c; 789 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) 790 : virt_addr; 791 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); 792 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, 793 1 << r->page_size); 794 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); 795 796 if (!USE_DYNAMIC_DMA) { 797 unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr); 798 DBG(" -> %s:%d\n", __func__, __LINE__); 799 DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__, 800 virt_addr); 801 DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__, 802 phys_addr); 803 DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__, 804 lpar_addr); 805 DBG("%s:%d len %lxh\n", __func__, __LINE__, len); 806 DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__, 807 *bus_addr, len); 808 } 809 810 spin_lock_irqsave(&r->chunk_list.lock, flags); 811 c = dma_find_chunk(r, *bus_addr, len); 812 813 if (c) { 814 DBG("%s:%d: reusing mapped chunk", __func__, __LINE__); 815 dma_dump_chunk(c); 816 c->usage_count++; 817 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 818 return 0; 819 } 820 821 result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag); 822 823 if (result) { 824 *bus_addr = 0; 825 DBG("%s:%d: dma_sb_map_pages failed (%d)\n", 826 __func__, __LINE__, result); 827 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 828 return result; 829 } 830 831 c->usage_count = 1; 832 833 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 834 return result; 835} 836 837static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr, 838 unsigned long len, dma_addr_t *bus_addr, 839 u64 iopte_flag) 840{ 841 int result; 842 unsigned long flags; 843 struct dma_chunk *c; 844 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) 845 : virt_addr; 846 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); 847 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, 848 1 << r->page_size); 849 850 DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__, 851 virt_addr, len); 852 DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__, 853 phys_addr, aligned_phys, aligned_len); 854 855 spin_lock_irqsave(&r->chunk_list.lock, flags); 856 c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len); 857 858 if (c) { 859 BUG(); 860 *bus_addr = c->bus_addr + phys_addr - aligned_phys; 861 c->usage_count++; 862 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 863 return 0; 864 } 865 866 result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c, 867 iopte_flag); 868 869 if (result) { 870 *bus_addr = 0; 871 DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n", 872 __func__, __LINE__, result); 873 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 874 return result; 875 } 876 *bus_addr = c->bus_addr + phys_addr - aligned_phys; 877 DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__, 878 virt_addr, phys_addr, aligned_phys, *bus_addr); 879 c->usage_count = 1; 880 881 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 882 return result; 883} 884 885/** 886 * dma_sb_unmap_area - Unmap an area of memory from a device dma region. 887 * @r: Pointer to a struct ps3_dma_region. 888 * @bus_addr: The starting ioc bus address of the area to unmap. 889 * @len: Length in bytes of the area to unmap. 890 * 891 * This is the common dma unmap routine. 892 */ 893 894static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr, 895 unsigned long len) 896{ 897 unsigned long flags; 898 struct dma_chunk *c; 899 900 spin_lock_irqsave(&r->chunk_list.lock, flags); 901 c = dma_find_chunk(r, bus_addr, len); 902 903 if (!c) { 904 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 905 1 << r->page_size); 906 unsigned long aligned_len = _ALIGN_UP(len + bus_addr 907 - aligned_bus, 1 << r->page_size); 908 DBG("%s:%d: not found: bus_addr %llxh\n", 909 __func__, __LINE__, bus_addr); 910 DBG("%s:%d: not found: len %lxh\n", 911 __func__, __LINE__, len); 912 DBG("%s:%d: not found: aligned_bus %lxh\n", 913 __func__, __LINE__, aligned_bus); 914 DBG("%s:%d: not found: aligned_len %lxh\n", 915 __func__, __LINE__, aligned_len); 916 BUG(); 917 } 918 919 c->usage_count--; 920 921 if (!c->usage_count) { 922 list_del(&c->link); 923 dma_sb_free_chunk(c); 924 } 925 926 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 927 return 0; 928} 929 930static int dma_ioc0_unmap_area(struct ps3_dma_region *r, 931 dma_addr_t bus_addr, unsigned long len) 932{ 933 unsigned long flags; 934 struct dma_chunk *c; 935 936 DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len); 937 spin_lock_irqsave(&r->chunk_list.lock, flags); 938 c = dma_find_chunk(r, bus_addr, len); 939 940 if (!c) { 941 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 942 1 << r->page_size); 943 unsigned long aligned_len = _ALIGN_UP(len + bus_addr 944 - aligned_bus, 945 1 << r->page_size); 946 DBG("%s:%d: not found: bus_addr %llxh\n", 947 __func__, __LINE__, bus_addr); 948 DBG("%s:%d: not found: len %lxh\n", 949 __func__, __LINE__, len); 950 DBG("%s:%d: not found: aligned_bus %lxh\n", 951 __func__, __LINE__, aligned_bus); 952 DBG("%s:%d: not found: aligned_len %lxh\n", 953 __func__, __LINE__, aligned_len); 954 BUG(); 955 } 956 957 c->usage_count--; 958 959 if (!c->usage_count) { 960 list_del(&c->link); 961 dma_ioc0_free_chunk(c); 962 } 963 964 spin_unlock_irqrestore(&r->chunk_list.lock, flags); 965 DBG("%s: end\n", __func__); 966 return 0; 967} 968 969/** 970 * dma_sb_region_create_linear - Setup a linear dma mapping for a device. 971 * @r: Pointer to a struct ps3_dma_region. 972 * 973 * This routine creates an HV dma region for the device and maps all available 974 * ram into the io controller bus address space. 975 */ 976 977static int dma_sb_region_create_linear(struct ps3_dma_region *r) 978{ 979 int result; 980 unsigned long virt_addr, len; 981 dma_addr_t tmp; 982 983 if (r->len > 16*1024*1024) { 984 /* force 16M dma pages for linear mapping */ 985 if (r->page_size != PS3_DMA_16M) { 986 pr_info("%s:%d: forcing 16M pages for linear map\n", 987 __func__, __LINE__); 988 r->page_size = PS3_DMA_16M; 989 r->len = _ALIGN_UP(r->len, 1 << r->page_size); 990 } 991 } 992 993 result = dma_sb_region_create(r); 994 BUG_ON(result); 995 996 if (r->offset < map.rm.size) { 997 /* Map (part of) 1st RAM chunk */ 998 virt_addr = map.rm.base + r->offset; 999 len = map.rm.size - r->offset; 1000 if (len > r->len) 1001 len = r->len; 1002 result = dma_sb_map_area(r, virt_addr, len, &tmp, 1003 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | 1004 CBE_IOPTE_M); 1005 BUG_ON(result); 1006 } 1007 1008 if (r->offset + r->len > map.rm.size) { 1009 /* Map (part of) 2nd RAM chunk */ 1010 virt_addr = map.rm.size; 1011 len = r->len; 1012 if (r->offset >= map.rm.size) 1013 virt_addr += r->offset - map.rm.size; 1014 else 1015 len -= map.rm.size - r->offset; 1016 result = dma_sb_map_area(r, virt_addr, len, &tmp, 1017 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | 1018 CBE_IOPTE_M); 1019 BUG_ON(result); 1020 } 1021 1022 return result; 1023} 1024 1025/** 1026 * dma_sb_region_free_linear - Free a linear dma mapping for a device. 1027 * @r: Pointer to a struct ps3_dma_region. 1028 * 1029 * This routine will unmap all mapped areas and free the HV dma region. 1030 */ 1031 1032static int dma_sb_region_free_linear(struct ps3_dma_region *r) 1033{ 1034 int result; 1035 dma_addr_t bus_addr; 1036 unsigned long len, lpar_addr; 1037 1038 if (r->offset < map.rm.size) { 1039 /* Unmap (part of) 1st RAM chunk */ 1040 lpar_addr = map.rm.base + r->offset; 1041 len = map.rm.size - r->offset; 1042 if (len > r->len) 1043 len = r->len; 1044 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); 1045 result = dma_sb_unmap_area(r, bus_addr, len); 1046 BUG_ON(result); 1047 } 1048 1049 if (r->offset + r->len > map.rm.size) { 1050 /* Unmap (part of) 2nd RAM chunk */ 1051 lpar_addr = map.r1.base; 1052 len = r->len; 1053 if (r->offset >= map.rm.size) 1054 lpar_addr += r->offset - map.rm.size; 1055 else 1056 len -= map.rm.size - r->offset; 1057 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); 1058 result = dma_sb_unmap_area(r, bus_addr, len); 1059 BUG_ON(result); 1060 } 1061 1062 result = dma_sb_region_free(r); 1063 BUG_ON(result); 1064 1065 return result; 1066} 1067 1068/** 1069 * dma_sb_map_area_linear - Map an area of memory into a device dma region. 1070 * @r: Pointer to a struct ps3_dma_region. 1071 * @virt_addr: Starting virtual address of the area to map. 1072 * @len: Length in bytes of the area to map. 1073 * @bus_addr: A pointer to return the starting ioc bus address of the area to 1074 * map. 1075 * 1076 * This routine just returns the corresponding bus address. Actual mapping 1077 * occurs in dma_region_create_linear(). 1078 */ 1079 1080static int dma_sb_map_area_linear(struct ps3_dma_region *r, 1081 unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr, 1082 u64 iopte_flag) 1083{ 1084 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) 1085 : virt_addr; 1086 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); 1087 return 0; 1088} 1089 1090/** 1091 * dma_unmap_area_linear - Unmap an area of memory from a device dma region. 1092 * @r: Pointer to a struct ps3_dma_region. 1093 * @bus_addr: The starting ioc bus address of the area to unmap. 1094 * @len: Length in bytes of the area to unmap. 1095 * 1096 * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear(). 1097 */ 1098 1099static int dma_sb_unmap_area_linear(struct ps3_dma_region *r, 1100 dma_addr_t bus_addr, unsigned long len) 1101{ 1102 return 0; 1103}; 1104 1105static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = { 1106 .create = dma_sb_region_create, 1107 .free = dma_sb_region_free, 1108 .map = dma_sb_map_area, 1109 .unmap = dma_sb_unmap_area 1110}; 1111 1112static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = { 1113 .create = dma_sb_region_create_linear, 1114 .free = dma_sb_region_free_linear, 1115 .map = dma_sb_map_area_linear, 1116 .unmap = dma_sb_unmap_area_linear 1117}; 1118 1119static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = { 1120 .create = dma_ioc0_region_create, 1121 .free = dma_ioc0_region_free, 1122 .map = dma_ioc0_map_area, 1123 .unmap = dma_ioc0_unmap_area 1124}; 1125 1126int ps3_dma_region_init(struct ps3_system_bus_device *dev, 1127 struct ps3_dma_region *r, enum ps3_dma_page_size page_size, 1128 enum ps3_dma_region_type region_type, void *addr, unsigned long len) 1129{ 1130 unsigned long lpar_addr; 1131 1132 lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; 1133 1134 r->dev = dev; 1135 r->page_size = page_size; 1136 r->region_type = region_type; 1137 r->offset = lpar_addr; 1138 if (r->offset >= map.rm.size) 1139 r->offset -= map.r1.offset; 1140 r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size); 1141 1142 switch (dev->dev_type) { 1143 case PS3_DEVICE_TYPE_SB: 1144 r->region_ops = (USE_DYNAMIC_DMA) 1145 ? &ps3_dma_sb_region_ops 1146 : &ps3_dma_sb_region_linear_ops; 1147 break; 1148 case PS3_DEVICE_TYPE_IOC0: 1149 r->region_ops = &ps3_dma_ioc0_region_ops; 1150 break; 1151 default: 1152 BUG(); 1153 return -EINVAL; 1154 } 1155 return 0; 1156} 1157EXPORT_SYMBOL(ps3_dma_region_init); 1158 1159int ps3_dma_region_create(struct ps3_dma_region *r) 1160{ 1161 BUG_ON(!r); 1162 BUG_ON(!r->region_ops); 1163 BUG_ON(!r->region_ops->create); 1164 return r->region_ops->create(r); 1165} 1166EXPORT_SYMBOL(ps3_dma_region_create); 1167 1168int ps3_dma_region_free(struct ps3_dma_region *r) 1169{ 1170 BUG_ON(!r); 1171 BUG_ON(!r->region_ops); 1172 BUG_ON(!r->region_ops->free); 1173 return r->region_ops->free(r); 1174} 1175EXPORT_SYMBOL(ps3_dma_region_free); 1176 1177int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, 1178 unsigned long len, dma_addr_t *bus_addr, 1179 u64 iopte_flag) 1180{ 1181 return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag); 1182} 1183 1184int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr, 1185 unsigned long len) 1186{ 1187 return r->region_ops->unmap(r, bus_addr, len); 1188} 1189 1190/*============================================================================*/ 1191/* system startup routines */ 1192/*============================================================================*/ 1193 1194/** 1195 * ps3_mm_init - initialize the address space state variables 1196 */ 1197 1198void __init ps3_mm_init(void) 1199{ 1200 int result; 1201 1202 DBG(" -> %s:%d\n", __func__, __LINE__); 1203 1204 result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size, 1205 &map.total); 1206 1207 if (result) 1208 panic("ps3_repository_read_mm_info() failed"); 1209 1210 map.rm.offset = map.rm.base; 1211 map.vas_id = map.htab_size = 0; 1212 1213 /* this implementation assumes map.rm.base is zero */ 1214 1215 BUG_ON(map.rm.base); 1216 BUG_ON(!map.rm.size); 1217 1218 1219 /* arrange to do this in ps3_mm_add_memory */ 1220 ps3_mm_region_create(&map.r1, map.total - map.rm.size); 1221 1222 /* correct map.total for the real total amount of memory we use */ 1223 map.total = map.rm.size + map.r1.size; 1224 1225 DBG(" <- %s:%d\n", __func__, __LINE__); 1226} 1227 1228/** 1229 * ps3_mm_shutdown - final cleanup of address space 1230 */ 1231 1232void ps3_mm_shutdown(void) 1233{ 1234 ps3_mm_region_destroy(&map.r1); 1235} 1236