1 // SPDX-License-Identifier: GPL-2.0-only
3 * PS3 address space management.
5 * Copyright (C) 2006 Sony Computer Entertainment Inc.
6 * Copyright 2006 Sony Corp.
9 #include <linux/dma-mapping.h>
10 #include <linux/kernel.h>
11 #include <linux/export.h>
12 #include <linux/memblock.h>
13 #include <linux/slab.h>
15 #include <asm/cell-regs.h>
16 #include <asm/firmware.h>
18 #include <asm/lv1call.h>
19 #include <asm/setup.h>
24 #define DBG udbg_printf
30 #if defined(CONFIG_PS3_DYNAMIC_DMA)
43 static unsigned long __init make_page_sizes(unsigned long a, unsigned long b)
45 return (a << 56) | (b << 48);
49 ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
50 ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
53 /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
56 HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
57 HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
60 /*============================================================================*/
61 /* virtual address space routines */
62 /*============================================================================*/
65 * struct mem_region - memory region structure
67 * @size: size in bytes
68 * @offset: difference between base and rm.size
69 * @destroy: flag if region should be destroyed upon shutdown
80 * struct map - address space state variables holder
81 * @total: total memory available as reported by HV
82 * @vas_id - HV virtual address space id
83 * @htab_size: htab size in bytes
85 * The HV virtual address space (vas) allows for hotplug memory regions.
86 * Memory regions can be created and destroyed in the vas at runtime.
87 * @rm: real mode (bootmem) region
88 * @r1: highmem region(s)
91 * virt_addr: a cpu 'translated' effective address
92 * phys_addr: an address in what Linux thinks is the physical address space
93 * lpar_addr: an address in the HV virtual address space
94 * bus_addr: an io controller 'translated' address on a device bus
101 struct mem_region rm;
102 struct mem_region r1;
105 #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
106 static void __maybe_unused _debug_dump_map(const struct map *m,
107 const char *func, int line)
109 DBG("%s:%d: map.total = %llxh\n", func, line, m->total);
110 DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size);
111 DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id);
112 DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size);
113 DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base);
114 DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
115 DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size);
118 static struct map map;
121 * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
122 * @phys_addr: linux physical address
125 unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
127 BUG_ON(is_kernel_addr(phys_addr));
128 return (phys_addr < map.rm.size || phys_addr >= map.total)
129 ? phys_addr : phys_addr + map.r1.offset;
132 EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
135 * ps3_mm_vas_create - create the virtual address space
138 void __init ps3_mm_vas_create(unsigned long* htab_size)
147 result = lv1_query_logical_partition_address_region_info(0,
148 &start_address, &size, &access_right, &max_page_size,
152 DBG("%s:%d: lv1_query_logical_partition_address_region_info "
153 "failed: %s\n", __func__, __LINE__,
158 if (max_page_size < PAGE_SHIFT_16M) {
159 DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__,
164 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
165 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
167 result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
168 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
169 &map.vas_id, &map.htab_size);
172 DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
173 __func__, __LINE__, ps3_result(result));
177 result = lv1_select_virtual_address_space(map.vas_id);
180 DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
181 __func__, __LINE__, ps3_result(result));
185 *htab_size = map.htab_size;
187 debug_dump_map(&map);
192 panic("ps3_mm_vas_create failed");
196 * ps3_mm_vas_destroy -
198 * called during kexec sequence with MMU off.
201 notrace void ps3_mm_vas_destroy(void)
206 result = lv1_select_virtual_address_space(0);
207 result += lv1_destruct_virtual_address_space(map.vas_id);
217 static int __init ps3_mm_get_repository_highmem(struct mem_region *r)
221 /* Assume a single highmem region. */
223 result = ps3_repository_read_highmem_info(0, &r->base, &r->size);
228 if (!r->base || !r->size) {
233 r->offset = r->base - map.rm.size;
235 DBG("%s:%d: Found high region in repository: %llxh %llxh\n",
236 __func__, __LINE__, r->base, r->size);
241 DBG("%s:%d: No high region in repository.\n", __func__, __LINE__);
243 r->size = r->base = r->offset = 0;
247 static int ps3_mm_set_repository_highmem(const struct mem_region *r)
249 /* Assume a single highmem region. */
251 return r ? ps3_repository_write_highmem_info(0, r->base, r->size) :
252 ps3_repository_write_highmem_info(0, 0, 0);
256 * ps3_mm_region_create - create a memory region in the vas
257 * @r: pointer to a struct mem_region to accept initialized values
258 * @size: requested region size
260 * This implementation creates the region with the vas large page size.
261 * @size is rounded down to a multiple of the vas large page size.
264 static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
269 r->size = ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
271 DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
272 DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size);
273 DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__,
274 size - r->size, (size - r->size) / 1024 / 1024);
277 DBG("%s:%d: size == 0\n", __func__, __LINE__);
282 result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
283 ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
285 if (result || r->base < map.rm.size) {
286 DBG("%s:%d: lv1_allocate_memory failed: %s\n",
287 __func__, __LINE__, ps3_result(result));
292 r->offset = r->base - map.rm.size;
296 r->size = r->base = r->offset = 0;
301 * ps3_mm_region_destroy - destroy a memory region
302 * @r: pointer to struct mem_region
305 static void ps3_mm_region_destroy(struct mem_region *r)
314 result = lv1_release_memory(r->base);
320 r->size = r->base = r->offset = 0;
321 map.total = map.rm.size;
324 ps3_mm_set_repository_highmem(NULL);
327 /*============================================================================*/
329 /*============================================================================*/
332 * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
333 * @r: pointer to dma region structure
334 * @lpar_addr: HV lpar address
337 static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r,
338 unsigned long lpar_addr)
340 if (lpar_addr >= map.rm.size)
341 lpar_addr -= map.r1.offset;
342 BUG_ON(lpar_addr < r->offset);
343 BUG_ON(lpar_addr >= r->offset + r->len);
344 return r->bus_addr + lpar_addr - r->offset;
347 #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
348 static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
349 const char *func, int line)
351 DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
353 DBG("%s:%d: page_size %u\n", func, line, r->page_size);
354 DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
355 DBG("%s:%d: len %lxh\n", func, line, r->len);
356 DBG("%s:%d: offset %lxh\n", func, line, r->offset);
360 * dma_chunk - A chunk of dma pages mapped by the io controller.
361 * @region - The dma region that owns this chunk.
362 * @lpar_addr: Starting lpar address of the area to map.
363 * @bus_addr: Starting ioc bus address of the area to map.
364 * @len: Length in bytes of the area to map.
365 * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
366 * list of all chunks owned by the region.
368 * This implementation uses a very simple dma page manager
369 * based on the dma_chunk structure. This scheme assumes
370 * that all drivers use very well behaved dma ops.
374 struct ps3_dma_region *region;
375 unsigned long lpar_addr;
376 unsigned long bus_addr;
378 struct list_head link;
379 unsigned int usage_count;
382 #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
383 static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
386 DBG("%s:%d: r.dev %llu:%llu\n", func, line,
387 c->region->dev->bus_id, c->region->dev->dev_id);
388 DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr);
389 DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size);
390 DBG("%s:%d: r.len %lxh\n", func, line, c->region->len);
391 DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset);
392 DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr);
393 DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr);
394 DBG("%s:%d: c.len %lxh\n", func, line, c->len);
397 static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
398 unsigned long bus_addr, unsigned long len)
401 unsigned long aligned_bus = ALIGN_DOWN(bus_addr, 1 << r->page_size);
402 unsigned long aligned_len = ALIGN(len+bus_addr-aligned_bus,
405 list_for_each_entry(c, &r->chunk_list.head, link) {
407 if (aligned_bus >= c->bus_addr &&
408 aligned_bus + aligned_len <= c->bus_addr + c->len)
412 if (aligned_bus + aligned_len <= c->bus_addr)
416 if (aligned_bus >= c->bus_addr + c->len)
419 /* we don't handle the multi-chunk case for now */
426 static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
427 unsigned long lpar_addr, unsigned long len)
430 unsigned long aligned_lpar = ALIGN_DOWN(lpar_addr, 1 << r->page_size);
431 unsigned long aligned_len = ALIGN(len + lpar_addr - aligned_lpar,
434 list_for_each_entry(c, &r->chunk_list.head, link) {
436 if (c->lpar_addr <= aligned_lpar &&
437 aligned_lpar < c->lpar_addr + c->len) {
438 if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
446 if (aligned_lpar + aligned_len <= c->lpar_addr) {
450 if (c->lpar_addr + c->len <= aligned_lpar) {
457 static int dma_sb_free_chunk(struct dma_chunk *c)
462 result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
463 c->region->dev->dev_id, c->bus_addr, c->len);
471 static int dma_ioc0_free_chunk(struct dma_chunk *c)
475 unsigned long offset;
476 struct ps3_dma_region *r = c->region;
478 DBG("%s:start\n", __func__);
479 for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
480 offset = (1 << r->page_size) * iopage;
481 /* put INVALID entry */
482 result = lv1_put_iopte(0,
483 c->bus_addr + offset,
484 c->lpar_addr + offset,
487 DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
488 c->bus_addr + offset,
489 c->lpar_addr + offset,
493 DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
494 __LINE__, ps3_result(result));
498 DBG("%s:end\n", __func__);
503 * dma_sb_map_pages - Maps dma pages into the io controller bus address space.
504 * @r: Pointer to a struct ps3_dma_region.
505 * @phys_addr: Starting physical address of the area to map.
506 * @len: Length in bytes of the area to map.
507 * c_out: A pointer to receive an allocated struct dma_chunk for this area.
509 * This is the lowest level dma mapping routine, and is the one that will
510 * make the HV call to add the pages into the io controller address space.
513 static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
514 unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
519 c = kzalloc(sizeof(*c), GFP_ATOMIC);
526 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
527 c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr);
530 BUG_ON(iopte_flag != 0xf800000000000000UL);
531 result = lv1_map_device_dma_region(c->region->dev->bus_id,
532 c->region->dev->dev_id, c->lpar_addr,
533 c->bus_addr, c->len, iopte_flag);
535 DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
536 __func__, __LINE__, ps3_result(result));
540 list_add(&c->link, &r->chunk_list.head);
549 DBG(" <- %s:%d\n", __func__, __LINE__);
553 static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
554 unsigned long len, struct dma_chunk **c_out,
558 struct dma_chunk *c, *last;
560 unsigned long offset;
562 DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
563 phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
564 c = kzalloc(sizeof(*c), GFP_ATOMIC);
572 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
573 /* allocate IO address */
574 if (list_empty(&r->chunk_list.head)) {
576 c->bus_addr = r->bus_addr;
578 /* derive from last bus addr*/
579 last = list_entry(r->chunk_list.head.next,
580 struct dma_chunk, link);
581 c->bus_addr = last->bus_addr + last->len;
582 DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
583 last->bus_addr, last->len);
586 /* FIXME: check whether length exceeds region size */
588 /* build ioptes for the area */
589 pages = len >> r->page_size;
590 DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__,
591 r->page_size, r->len, pages, iopte_flag);
592 for (iopage = 0; iopage < pages; iopage++) {
593 offset = (1 << r->page_size) * iopage;
594 result = lv1_put_iopte(0,
595 c->bus_addr + offset,
596 c->lpar_addr + offset,
600 pr_warn("%s:%d: lv1_put_iopte failed: %s\n",
601 __func__, __LINE__, ps3_result(result));
604 DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
605 iopage, c->bus_addr + offset, c->lpar_addr + offset,
609 /* be sure that last allocated one is inserted at head */
610 list_add(&c->link, &r->chunk_list.head);
613 DBG("%s: end\n", __func__);
617 for (iopage--; 0 <= iopage; iopage--) {
619 c->bus_addr + offset,
620 c->lpar_addr + offset,
631 * dma_sb_region_create - Create a device dma region.
632 * @r: Pointer to a struct ps3_dma_region.
634 * This is the lowest level dma region create routine, and is the one that
635 * will make the HV call to create the region.
638 static int dma_sb_region_create(struct ps3_dma_region *r)
643 DBG(" -> %s:%d:\n", __func__, __LINE__);
647 if (!r->dev->bus_id) {
648 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
649 r->dev->bus_id, r->dev->dev_id);
653 DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
654 __LINE__, r->len, r->page_size, r->offset);
657 BUG_ON(!r->page_size);
658 BUG_ON(!r->region_ops);
660 INIT_LIST_HEAD(&r->chunk_list.head);
661 spin_lock_init(&r->chunk_list.lock);
663 result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
664 roundup_pow_of_two(r->len), r->page_size, r->region_type,
666 r->bus_addr = bus_addr;
669 DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
670 __func__, __LINE__, ps3_result(result));
671 r->len = r->bus_addr = 0;
677 static int dma_ioc0_region_create(struct ps3_dma_region *r)
682 INIT_LIST_HEAD(&r->chunk_list.head);
683 spin_lock_init(&r->chunk_list.lock);
685 result = lv1_allocate_io_segment(0,
689 r->bus_addr = bus_addr;
691 DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
692 __func__, __LINE__, ps3_result(result));
693 r->len = r->bus_addr = 0;
695 DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
696 r->len, r->page_size, r->bus_addr);
701 * dma_region_free - Free a device dma region.
702 * @r: Pointer to a struct ps3_dma_region.
704 * This is the lowest level dma region free routine, and is the one that
705 * will make the HV call to free the region.
708 static int dma_sb_region_free(struct ps3_dma_region *r)
712 struct dma_chunk *tmp;
716 if (!r->dev->bus_id) {
717 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
718 r->dev->bus_id, r->dev->dev_id);
722 list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
724 dma_sb_free_chunk(c);
727 result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
731 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
732 __func__, __LINE__, ps3_result(result));
739 static int dma_ioc0_region_free(struct ps3_dma_region *r)
742 struct dma_chunk *c, *n;
744 DBG("%s: start\n", __func__);
745 list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
747 dma_ioc0_free_chunk(c);
750 result = lv1_release_io_segment(0, r->bus_addr);
753 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
754 __func__, __LINE__, ps3_result(result));
757 DBG("%s: end\n", __func__);
763 * dma_sb_map_area - Map an area of memory into a device dma region.
764 * @r: Pointer to a struct ps3_dma_region.
765 * @virt_addr: Starting virtual address of the area to map.
766 * @len: Length in bytes of the area to map.
767 * @bus_addr: A pointer to return the starting ioc bus address of the area to
770 * This is the common dma mapping routine.
773 static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
774 unsigned long len, dma_addr_t *bus_addr,
780 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
782 unsigned long aligned_phys = ALIGN_DOWN(phys_addr, 1 << r->page_size);
783 unsigned long aligned_len = ALIGN(len + phys_addr - aligned_phys,
785 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
787 if (!USE_DYNAMIC_DMA) {
788 unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
789 DBG(" -> %s:%d\n", __func__, __LINE__);
790 DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
792 DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
794 DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
796 DBG("%s:%d len %lxh\n", __func__, __LINE__, len);
797 DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__,
801 spin_lock_irqsave(&r->chunk_list.lock, flags);
802 c = dma_find_chunk(r, *bus_addr, len);
805 DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
808 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
812 result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
816 DBG("%s:%d: dma_sb_map_pages failed (%d)\n",
817 __func__, __LINE__, result);
818 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
824 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
828 static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
829 unsigned long len, dma_addr_t *bus_addr,
835 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
837 unsigned long aligned_phys = ALIGN_DOWN(phys_addr, 1 << r->page_size);
838 unsigned long aligned_len = ALIGN(len + phys_addr - aligned_phys,
841 DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
843 DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
844 phys_addr, aligned_phys, aligned_len);
846 spin_lock_irqsave(&r->chunk_list.lock, flags);
847 c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
852 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
854 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
858 result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
863 DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
864 __func__, __LINE__, result);
865 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
868 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
869 DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__,
870 virt_addr, phys_addr, aligned_phys, *bus_addr);
873 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
878 * dma_sb_unmap_area - Unmap an area of memory from a device dma region.
879 * @r: Pointer to a struct ps3_dma_region.
880 * @bus_addr: The starting ioc bus address of the area to unmap.
881 * @len: Length in bytes of the area to unmap.
883 * This is the common dma unmap routine.
886 static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr,
892 spin_lock_irqsave(&r->chunk_list.lock, flags);
893 c = dma_find_chunk(r, bus_addr, len);
896 unsigned long aligned_bus = ALIGN_DOWN(bus_addr,
898 unsigned long aligned_len = ALIGN(len + bus_addr
899 - aligned_bus, 1 << r->page_size);
900 DBG("%s:%d: not found: bus_addr %llxh\n",
901 __func__, __LINE__, bus_addr);
902 DBG("%s:%d: not found: len %lxh\n",
903 __func__, __LINE__, len);
904 DBG("%s:%d: not found: aligned_bus %lxh\n",
905 __func__, __LINE__, aligned_bus);
906 DBG("%s:%d: not found: aligned_len %lxh\n",
907 __func__, __LINE__, aligned_len);
913 if (!c->usage_count) {
915 dma_sb_free_chunk(c);
918 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
922 static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
923 dma_addr_t bus_addr, unsigned long len)
928 DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len);
929 spin_lock_irqsave(&r->chunk_list.lock, flags);
930 c = dma_find_chunk(r, bus_addr, len);
933 unsigned long aligned_bus = ALIGN_DOWN(bus_addr,
935 unsigned long aligned_len = ALIGN(len + bus_addr
938 DBG("%s:%d: not found: bus_addr %llxh\n",
939 __func__, __LINE__, bus_addr);
940 DBG("%s:%d: not found: len %lxh\n",
941 __func__, __LINE__, len);
942 DBG("%s:%d: not found: aligned_bus %lxh\n",
943 __func__, __LINE__, aligned_bus);
944 DBG("%s:%d: not found: aligned_len %lxh\n",
945 __func__, __LINE__, aligned_len);
951 if (!c->usage_count) {
953 dma_ioc0_free_chunk(c);
956 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
957 DBG("%s: end\n", __func__);
962 * dma_sb_region_create_linear - Setup a linear dma mapping for a device.
963 * @r: Pointer to a struct ps3_dma_region.
965 * This routine creates an HV dma region for the device and maps all available
966 * ram into the io controller bus address space.
969 static int dma_sb_region_create_linear(struct ps3_dma_region *r)
972 unsigned long virt_addr, len;
975 if (r->len > 16*1024*1024) { /* FIXME: need proper fix */
976 /* force 16M dma pages for linear mapping */
977 if (r->page_size != PS3_DMA_16M) {
978 pr_info("%s:%d: forcing 16M pages for linear map\n",
980 r->page_size = PS3_DMA_16M;
981 r->len = ALIGN(r->len, 1 << r->page_size);
985 result = dma_sb_region_create(r);
988 if (r->offset < map.rm.size) {
989 /* Map (part of) 1st RAM chunk */
990 virt_addr = map.rm.base + r->offset;
991 len = map.rm.size - r->offset;
994 result = dma_sb_map_area(r, virt_addr, len, &tmp,
995 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
1000 if (r->offset + r->len > map.rm.size) {
1001 /* Map (part of) 2nd RAM chunk */
1002 virt_addr = map.rm.size;
1004 if (r->offset >= map.rm.size)
1005 virt_addr += r->offset - map.rm.size;
1007 len -= map.rm.size - r->offset;
1008 result = dma_sb_map_area(r, virt_addr, len, &tmp,
1009 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
1018 * dma_sb_region_free_linear - Free a linear dma mapping for a device.
1019 * @r: Pointer to a struct ps3_dma_region.
1021 * This routine will unmap all mapped areas and free the HV dma region.
1024 static int dma_sb_region_free_linear(struct ps3_dma_region *r)
1027 dma_addr_t bus_addr;
1028 unsigned long len, lpar_addr;
1030 if (r->offset < map.rm.size) {
1031 /* Unmap (part of) 1st RAM chunk */
1032 lpar_addr = map.rm.base + r->offset;
1033 len = map.rm.size - r->offset;
1036 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1037 result = dma_sb_unmap_area(r, bus_addr, len);
1041 if (r->offset + r->len > map.rm.size) {
1042 /* Unmap (part of) 2nd RAM chunk */
1043 lpar_addr = map.r1.base;
1045 if (r->offset >= map.rm.size)
1046 lpar_addr += r->offset - map.rm.size;
1048 len -= map.rm.size - r->offset;
1049 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1050 result = dma_sb_unmap_area(r, bus_addr, len);
1054 result = dma_sb_region_free(r);
1061 * dma_sb_map_area_linear - Map an area of memory into a device dma region.
1062 * @r: Pointer to a struct ps3_dma_region.
1063 * @virt_addr: Starting virtual address of the area to map.
1064 * @len: Length in bytes of the area to map.
1065 * @bus_addr: A pointer to return the starting ioc bus address of the area to
1068 * This routine just returns the corresponding bus address. Actual mapping
1069 * occurs in dma_region_create_linear().
1072 static int dma_sb_map_area_linear(struct ps3_dma_region *r,
1073 unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr,
1076 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
1078 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
1083 * dma_unmap_area_linear - Unmap an area of memory from a device dma region.
1084 * @r: Pointer to a struct ps3_dma_region.
1085 * @bus_addr: The starting ioc bus address of the area to unmap.
1086 * @len: Length in bytes of the area to unmap.
1088 * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear().
1091 static int dma_sb_unmap_area_linear(struct ps3_dma_region *r,
1092 dma_addr_t bus_addr, unsigned long len)
1097 static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = {
1098 .create = dma_sb_region_create,
1099 .free = dma_sb_region_free,
1100 .map = dma_sb_map_area,
1101 .unmap = dma_sb_unmap_area
1104 static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = {
1105 .create = dma_sb_region_create_linear,
1106 .free = dma_sb_region_free_linear,
1107 .map = dma_sb_map_area_linear,
1108 .unmap = dma_sb_unmap_area_linear
1111 static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = {
1112 .create = dma_ioc0_region_create,
1113 .free = dma_ioc0_region_free,
1114 .map = dma_ioc0_map_area,
1115 .unmap = dma_ioc0_unmap_area
1118 int ps3_dma_region_init(struct ps3_system_bus_device *dev,
1119 struct ps3_dma_region *r, enum ps3_dma_page_size page_size,
1120 enum ps3_dma_region_type region_type, void *addr, unsigned long len)
1122 unsigned long lpar_addr;
1125 lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
1128 r->page_size = page_size;
1129 r->region_type = region_type;
1130 r->offset = lpar_addr;
1131 if (r->offset >= map.rm.size)
1132 r->offset -= map.r1.offset;
1133 r->len = len ? len : ALIGN(map.total, 1 << r->page_size);
1135 dev->core.dma_mask = &r->dma_mask;
1137 result = dma_set_mask_and_coherent(&dev->core, DMA_BIT_MASK(32));
1140 dev_err(&dev->core, "%s:%d: dma_set_mask_and_coherent failed: %d\n",
1141 __func__, __LINE__, result);
1145 switch (dev->dev_type) {
1146 case PS3_DEVICE_TYPE_SB:
1147 r->region_ops = (USE_DYNAMIC_DMA)
1148 ? &ps3_dma_sb_region_ops
1149 : &ps3_dma_sb_region_linear_ops;
1151 case PS3_DEVICE_TYPE_IOC0:
1152 r->region_ops = &ps3_dma_ioc0_region_ops;
1160 EXPORT_SYMBOL(ps3_dma_region_init);
1162 int ps3_dma_region_create(struct ps3_dma_region *r)
1165 BUG_ON(!r->region_ops);
1166 BUG_ON(!r->region_ops->create);
1167 return r->region_ops->create(r);
1169 EXPORT_SYMBOL(ps3_dma_region_create);
1171 int ps3_dma_region_free(struct ps3_dma_region *r)
1174 BUG_ON(!r->region_ops);
1175 BUG_ON(!r->region_ops->free);
1176 return r->region_ops->free(r);
1178 EXPORT_SYMBOL(ps3_dma_region_free);
1180 int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
1181 unsigned long len, dma_addr_t *bus_addr,
1184 return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
1187 int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr,
1190 return r->region_ops->unmap(r, bus_addr, len);
1193 /*============================================================================*/
1194 /* system startup routines */
1195 /*============================================================================*/
1198 * ps3_mm_init - initialize the address space state variables
1201 void __init ps3_mm_init(void)
1205 DBG(" -> %s:%d\n", __func__, __LINE__);
1207 result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
1211 panic("ps3_repository_read_mm_info() failed");
1213 map.rm.offset = map.rm.base;
1214 map.vas_id = map.htab_size = 0;
1216 /* this implementation assumes map.rm.base is zero */
1218 BUG_ON(map.rm.base);
1219 BUG_ON(!map.rm.size);
1221 /* Check if we got the highmem region from an earlier boot step */
1223 if (ps3_mm_get_repository_highmem(&map.r1)) {
1224 result = ps3_mm_region_create(&map.r1, map.total - map.rm.size);
1227 ps3_mm_set_repository_highmem(&map.r1);
1230 /* correct map.total for the real total amount of memory we use */
1231 map.total = map.rm.size + map.r1.size;
1234 DBG("%s:%d: No highmem region found\n", __func__, __LINE__);
1236 DBG("%s:%d: Adding highmem region: %llxh %llxh\n",
1237 __func__, __LINE__, map.rm.size,
1238 map.total - map.rm.size);
1239 memblock_add(map.rm.size, map.total - map.rm.size);
1242 DBG(" <- %s:%d\n", __func__, __LINE__);
1246 * ps3_mm_shutdown - final cleanup of address space
1248 * called during kexec sequence with MMU off.
1251 notrace void ps3_mm_shutdown(void)
1253 ps3_mm_region_destroy(&map.r1);