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>
19 #include <asm/lv1call.h>
20 #include <asm/setup.h>
25 #define DBG udbg_printf
31 #if defined(CONFIG_PS3_DYNAMIC_DMA)
44 static unsigned long make_page_sizes(unsigned long a, unsigned long b)
46 return (a << 56) | (b << 48);
50 ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
51 ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
54 /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
57 HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
58 HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
61 /*============================================================================*/
62 /* virtual address space routines */
63 /*============================================================================*/
66 * struct mem_region - memory region structure
68 * @size: size in bytes
69 * @offset: difference between base and rm.size
70 * @destroy: flag if region should be destroyed upon shutdown
81 * struct map - address space state variables holder
82 * @total: total memory available as reported by HV
83 * @vas_id - HV virtual address space id
84 * @htab_size: htab size in bytes
86 * The HV virtual address space (vas) allows for hotplug memory regions.
87 * Memory regions can be created and destroyed in the vas at runtime.
88 * @rm: real mode (bootmem) region
89 * @r1: highmem region(s)
92 * virt_addr: a cpu 'translated' effective address
93 * phys_addr: an address in what Linux thinks is the physical address space
94 * lpar_addr: an address in the HV virtual address space
95 * bus_addr: an io controller 'translated' address on a device bus
102 struct mem_region rm;
103 struct mem_region r1;
106 #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
107 static void __maybe_unused _debug_dump_map(const struct map *m,
108 const char *func, int line)
110 DBG("%s:%d: map.total = %llxh\n", func, line, m->total);
111 DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size);
112 DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id);
113 DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size);
114 DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base);
115 DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
116 DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size);
119 static struct map map;
122 * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
123 * @phys_addr: linux physical address
126 unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
128 BUG_ON(is_kernel_addr(phys_addr));
129 return (phys_addr < map.rm.size || phys_addr >= map.total)
130 ? phys_addr : phys_addr + map.r1.offset;
133 EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
136 * ps3_mm_vas_create - create the virtual address space
139 void __init ps3_mm_vas_create(unsigned long* htab_size)
148 result = lv1_query_logical_partition_address_region_info(0,
149 &start_address, &size, &access_right, &max_page_size,
153 DBG("%s:%d: lv1_query_logical_partition_address_region_info "
154 "failed: %s\n", __func__, __LINE__,
159 if (max_page_size < PAGE_SHIFT_16M) {
160 DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__,
165 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
166 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
168 result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
169 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
170 &map.vas_id, &map.htab_size);
173 DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
174 __func__, __LINE__, ps3_result(result));
178 result = lv1_select_virtual_address_space(map.vas_id);
181 DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
182 __func__, __LINE__, ps3_result(result));
186 *htab_size = map.htab_size;
188 debug_dump_map(&map);
193 panic("ps3_mm_vas_create failed");
197 * ps3_mm_vas_destroy -
200 void ps3_mm_vas_destroy(void)
205 result = lv1_select_virtual_address_space(0);
206 result += lv1_destruct_virtual_address_space(map.vas_id);
216 static int ps3_mm_get_repository_highmem(struct mem_region *r)
220 /* Assume a single highmem region. */
222 result = ps3_repository_read_highmem_info(0, &r->base, &r->size);
227 if (!r->base || !r->size) {
232 r->offset = r->base - map.rm.size;
234 DBG("%s:%d: Found high region in repository: %llxh %llxh\n",
235 __func__, __LINE__, r->base, r->size);
240 DBG("%s:%d: No high region in repository.\n", __func__, __LINE__);
242 r->size = r->base = r->offset = 0;
246 static int ps3_mm_set_repository_highmem(const struct mem_region *r)
248 /* Assume a single highmem region. */
250 return r ? ps3_repository_write_highmem_info(0, r->base, r->size) :
251 ps3_repository_write_highmem_info(0, 0, 0);
255 * ps3_mm_region_create - create a memory region in the vas
256 * @r: pointer to a struct mem_region to accept initialized values
257 * @size: requested region size
259 * This implementation creates the region with the vas large page size.
260 * @size is rounded down to a multiple of the vas large page size.
263 static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
268 r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
270 DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
271 DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size);
272 DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__,
273 size - r->size, (size - r->size) / 1024 / 1024);
276 DBG("%s:%d: size == 0\n", __func__, __LINE__);
281 result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
282 ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
284 if (result || r->base < map.rm.size) {
285 DBG("%s:%d: lv1_allocate_memory failed: %s\n",
286 __func__, __LINE__, ps3_result(result));
291 r->offset = r->base - map.rm.size;
295 r->size = r->base = r->offset = 0;
300 * ps3_mm_region_destroy - destroy a memory region
301 * @r: pointer to struct mem_region
304 static void ps3_mm_region_destroy(struct mem_region *r)
313 result = lv1_release_memory(r->base);
319 r->size = r->base = r->offset = 0;
320 map.total = map.rm.size;
323 ps3_mm_set_repository_highmem(NULL);
326 /*============================================================================*/
328 /*============================================================================*/
331 * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
332 * @r: pointer to dma region structure
333 * @lpar_addr: HV lpar address
336 static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r,
337 unsigned long lpar_addr)
339 if (lpar_addr >= map.rm.size)
340 lpar_addr -= map.r1.offset;
341 BUG_ON(lpar_addr < r->offset);
342 BUG_ON(lpar_addr >= r->offset + r->len);
343 return r->bus_addr + lpar_addr - r->offset;
346 #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
347 static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
348 const char *func, int line)
350 DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
352 DBG("%s:%d: page_size %u\n", func, line, r->page_size);
353 DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
354 DBG("%s:%d: len %lxh\n", func, line, r->len);
355 DBG("%s:%d: offset %lxh\n", func, line, r->offset);
359 * dma_chunk - A chunk of dma pages mapped by the io controller.
360 * @region - The dma region that owns this chunk.
361 * @lpar_addr: Starting lpar address of the area to map.
362 * @bus_addr: Starting ioc bus address of the area to map.
363 * @len: Length in bytes of the area to map.
364 * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
365 * list of all chuncks owned by the region.
367 * This implementation uses a very simple dma page manager
368 * based on the dma_chunk structure. This scheme assumes
369 * that all drivers use very well behaved dma ops.
373 struct ps3_dma_region *region;
374 unsigned long lpar_addr;
375 unsigned long bus_addr;
377 struct list_head link;
378 unsigned int usage_count;
381 #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
382 static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
385 DBG("%s:%d: r.dev %llu:%llu\n", func, line,
386 c->region->dev->bus_id, c->region->dev->dev_id);
387 DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr);
388 DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size);
389 DBG("%s:%d: r.len %lxh\n", func, line, c->region->len);
390 DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset);
391 DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr);
392 DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr);
393 DBG("%s:%d: c.len %lxh\n", func, line, c->len);
396 static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
397 unsigned long bus_addr, unsigned long len)
400 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size);
401 unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus,
404 list_for_each_entry(c, &r->chunk_list.head, link) {
406 if (aligned_bus >= c->bus_addr &&
407 aligned_bus + aligned_len <= c->bus_addr + c->len)
411 if (aligned_bus + aligned_len <= c->bus_addr)
415 if (aligned_bus >= c->bus_addr + c->len)
418 /* we don't handle the multi-chunk case for now */
425 static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
426 unsigned long lpar_addr, unsigned long len)
429 unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size);
430 unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar,
433 list_for_each_entry(c, &r->chunk_list.head, link) {
435 if (c->lpar_addr <= aligned_lpar &&
436 aligned_lpar < c->lpar_addr + c->len) {
437 if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
445 if (aligned_lpar + aligned_len <= c->lpar_addr) {
449 if (c->lpar_addr + c->len <= aligned_lpar) {
456 static int dma_sb_free_chunk(struct dma_chunk *c)
461 result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
462 c->region->dev->dev_id, c->bus_addr, c->len);
470 static int dma_ioc0_free_chunk(struct dma_chunk *c)
474 unsigned long offset;
475 struct ps3_dma_region *r = c->region;
477 DBG("%s:start\n", __func__);
478 for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
479 offset = (1 << r->page_size) * iopage;
480 /* put INVALID entry */
481 result = lv1_put_iopte(0,
482 c->bus_addr + offset,
483 c->lpar_addr + offset,
486 DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
487 c->bus_addr + offset,
488 c->lpar_addr + offset,
492 DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
493 __LINE__, ps3_result(result));
497 DBG("%s:end\n", __func__);
502 * dma_sb_map_pages - Maps dma pages into the io controller bus address space.
503 * @r: Pointer to a struct ps3_dma_region.
504 * @phys_addr: Starting physical address of the area to map.
505 * @len: Length in bytes of the area to map.
506 * c_out: A pointer to receive an allocated struct dma_chunk for this area.
508 * This is the lowest level dma mapping routine, and is the one that will
509 * make the HV call to add the pages into the io controller address space.
512 static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
513 unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
518 c = kzalloc(sizeof(*c), GFP_ATOMIC);
525 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
526 c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr);
529 BUG_ON(iopte_flag != 0xf800000000000000UL);
530 result = lv1_map_device_dma_region(c->region->dev->bus_id,
531 c->region->dev->dev_id, c->lpar_addr,
532 c->bus_addr, c->len, iopte_flag);
534 DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
535 __func__, __LINE__, ps3_result(result));
539 list_add(&c->link, &r->chunk_list.head);
548 DBG(" <- %s:%d\n", __func__, __LINE__);
552 static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
553 unsigned long len, struct dma_chunk **c_out,
557 struct dma_chunk *c, *last;
559 unsigned long offset;
561 DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
562 phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
563 c = kzalloc(sizeof(*c), GFP_ATOMIC);
571 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
572 /* allocate IO address */
573 if (list_empty(&r->chunk_list.head)) {
575 c->bus_addr = r->bus_addr;
577 /* derive from last bus addr*/
578 last = list_entry(r->chunk_list.head.next,
579 struct dma_chunk, link);
580 c->bus_addr = last->bus_addr + last->len;
581 DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
582 last->bus_addr, last->len);
585 /* FIXME: check whether length exceeds region size */
587 /* build ioptes for the area */
588 pages = len >> r->page_size;
589 DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__,
590 r->page_size, r->len, pages, iopte_flag);
591 for (iopage = 0; iopage < pages; iopage++) {
592 offset = (1 << r->page_size) * iopage;
593 result = lv1_put_iopte(0,
594 c->bus_addr + offset,
595 c->lpar_addr + offset,
599 pr_warn("%s:%d: lv1_put_iopte failed: %s\n",
600 __func__, __LINE__, ps3_result(result));
603 DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
604 iopage, c->bus_addr + offset, c->lpar_addr + offset,
608 /* be sure that last allocated one is inserted at head */
609 list_add(&c->link, &r->chunk_list.head);
612 DBG("%s: end\n", __func__);
616 for (iopage--; 0 <= iopage; iopage--) {
618 c->bus_addr + offset,
619 c->lpar_addr + offset,
630 * dma_sb_region_create - Create a device dma region.
631 * @r: Pointer to a struct ps3_dma_region.
633 * This is the lowest level dma region create routine, and is the one that
634 * will make the HV call to create the region.
637 static int dma_sb_region_create(struct ps3_dma_region *r)
642 DBG(" -> %s:%d:\n", __func__, __LINE__);
646 if (!r->dev->bus_id) {
647 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
648 r->dev->bus_id, r->dev->dev_id);
652 DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
653 __LINE__, r->len, r->page_size, r->offset);
656 BUG_ON(!r->page_size);
657 BUG_ON(!r->region_ops);
659 INIT_LIST_HEAD(&r->chunk_list.head);
660 spin_lock_init(&r->chunk_list.lock);
662 result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
663 roundup_pow_of_two(r->len), r->page_size, r->region_type,
665 r->bus_addr = bus_addr;
668 DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
669 __func__, __LINE__, ps3_result(result));
670 r->len = r->bus_addr = 0;
676 static int dma_ioc0_region_create(struct ps3_dma_region *r)
681 INIT_LIST_HEAD(&r->chunk_list.head);
682 spin_lock_init(&r->chunk_list.lock);
684 result = lv1_allocate_io_segment(0,
688 r->bus_addr = bus_addr;
690 DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
691 __func__, __LINE__, ps3_result(result));
692 r->len = r->bus_addr = 0;
694 DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
695 r->len, r->page_size, r->bus_addr);
700 * dma_region_free - Free a device dma region.
701 * @r: Pointer to a struct ps3_dma_region.
703 * This is the lowest level dma region free routine, and is the one that
704 * will make the HV call to free the region.
707 static int dma_sb_region_free(struct ps3_dma_region *r)
711 struct dma_chunk *tmp;
715 if (!r->dev->bus_id) {
716 pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
717 r->dev->bus_id, r->dev->dev_id);
721 list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
723 dma_sb_free_chunk(c);
726 result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
730 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
731 __func__, __LINE__, ps3_result(result));
738 static int dma_ioc0_region_free(struct ps3_dma_region *r)
741 struct dma_chunk *c, *n;
743 DBG("%s: start\n", __func__);
744 list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
746 dma_ioc0_free_chunk(c);
749 result = lv1_release_io_segment(0, r->bus_addr);
752 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
753 __func__, __LINE__, ps3_result(result));
756 DBG("%s: end\n", __func__);
762 * dma_sb_map_area - Map an area of memory into a device dma region.
763 * @r: Pointer to a struct ps3_dma_region.
764 * @virt_addr: Starting virtual address of the area to map.
765 * @len: Length in bytes of the area to map.
766 * @bus_addr: A pointer to return the starting ioc bus address of the area to
769 * This is the common dma mapping routine.
772 static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
773 unsigned long len, dma_addr_t *bus_addr,
779 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
781 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
782 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
784 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
786 if (!USE_DYNAMIC_DMA) {
787 unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
788 DBG(" -> %s:%d\n", __func__, __LINE__);
789 DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
791 DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
793 DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
795 DBG("%s:%d len %lxh\n", __func__, __LINE__, len);
796 DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__,
800 spin_lock_irqsave(&r->chunk_list.lock, flags);
801 c = dma_find_chunk(r, *bus_addr, len);
804 DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
807 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
811 result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
815 DBG("%s:%d: dma_sb_map_pages failed (%d)\n",
816 __func__, __LINE__, result);
817 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
823 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
827 static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
828 unsigned long len, dma_addr_t *bus_addr,
834 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
836 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
837 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
840 DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
842 DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
843 phys_addr, aligned_phys, aligned_len);
845 spin_lock_irqsave(&r->chunk_list.lock, flags);
846 c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
851 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
853 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
857 result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
862 DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
863 __func__, __LINE__, result);
864 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
867 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
868 DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__,
869 virt_addr, phys_addr, aligned_phys, *bus_addr);
872 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
877 * dma_sb_unmap_area - Unmap an area of memory from a device dma region.
878 * @r: Pointer to a struct ps3_dma_region.
879 * @bus_addr: The starting ioc bus address of the area to unmap.
880 * @len: Length in bytes of the area to unmap.
882 * This is the common dma unmap routine.
885 static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr,
891 spin_lock_irqsave(&r->chunk_list.lock, flags);
892 c = dma_find_chunk(r, bus_addr, len);
895 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
897 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
898 - aligned_bus, 1 << r->page_size);
899 DBG("%s:%d: not found: bus_addr %llxh\n",
900 __func__, __LINE__, bus_addr);
901 DBG("%s:%d: not found: len %lxh\n",
902 __func__, __LINE__, len);
903 DBG("%s:%d: not found: aligned_bus %lxh\n",
904 __func__, __LINE__, aligned_bus);
905 DBG("%s:%d: not found: aligned_len %lxh\n",
906 __func__, __LINE__, aligned_len);
912 if (!c->usage_count) {
914 dma_sb_free_chunk(c);
917 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
921 static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
922 dma_addr_t bus_addr, unsigned long len)
927 DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len);
928 spin_lock_irqsave(&r->chunk_list.lock, flags);
929 c = dma_find_chunk(r, bus_addr, len);
932 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
934 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
937 DBG("%s:%d: not found: bus_addr %llxh\n",
938 __func__, __LINE__, bus_addr);
939 DBG("%s:%d: not found: len %lxh\n",
940 __func__, __LINE__, len);
941 DBG("%s:%d: not found: aligned_bus %lxh\n",
942 __func__, __LINE__, aligned_bus);
943 DBG("%s:%d: not found: aligned_len %lxh\n",
944 __func__, __LINE__, aligned_len);
950 if (!c->usage_count) {
952 dma_ioc0_free_chunk(c);
955 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
956 DBG("%s: end\n", __func__);
961 * dma_sb_region_create_linear - Setup a linear dma mapping for a device.
962 * @r: Pointer to a struct ps3_dma_region.
964 * This routine creates an HV dma region for the device and maps all available
965 * ram into the io controller bus address space.
968 static int dma_sb_region_create_linear(struct ps3_dma_region *r)
971 unsigned long virt_addr, len;
974 if (r->len > 16*1024*1024) { /* FIXME: need proper fix */
975 /* force 16M dma pages for linear mapping */
976 if (r->page_size != PS3_DMA_16M) {
977 pr_info("%s:%d: forcing 16M pages for linear map\n",
979 r->page_size = PS3_DMA_16M;
980 r->len = _ALIGN_UP(r->len, 1 << r->page_size);
984 result = dma_sb_region_create(r);
987 if (r->offset < map.rm.size) {
988 /* Map (part of) 1st RAM chunk */
989 virt_addr = map.rm.base + r->offset;
990 len = map.rm.size - r->offset;
993 result = dma_sb_map_area(r, virt_addr, len, &tmp,
994 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
999 if (r->offset + r->len > map.rm.size) {
1000 /* Map (part of) 2nd RAM chunk */
1001 virt_addr = map.rm.size;
1003 if (r->offset >= map.rm.size)
1004 virt_addr += r->offset - map.rm.size;
1006 len -= map.rm.size - r->offset;
1007 result = dma_sb_map_area(r, virt_addr, len, &tmp,
1008 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
1017 * dma_sb_region_free_linear - Free a linear dma mapping for a device.
1018 * @r: Pointer to a struct ps3_dma_region.
1020 * This routine will unmap all mapped areas and free the HV dma region.
1023 static int dma_sb_region_free_linear(struct ps3_dma_region *r)
1026 dma_addr_t bus_addr;
1027 unsigned long len, lpar_addr;
1029 if (r->offset < map.rm.size) {
1030 /* Unmap (part of) 1st RAM chunk */
1031 lpar_addr = map.rm.base + r->offset;
1032 len = map.rm.size - r->offset;
1035 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1036 result = dma_sb_unmap_area(r, bus_addr, len);
1040 if (r->offset + r->len > map.rm.size) {
1041 /* Unmap (part of) 2nd RAM chunk */
1042 lpar_addr = map.r1.base;
1044 if (r->offset >= map.rm.size)
1045 lpar_addr += r->offset - map.rm.size;
1047 len -= map.rm.size - r->offset;
1048 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1049 result = dma_sb_unmap_area(r, bus_addr, len);
1053 result = dma_sb_region_free(r);
1060 * dma_sb_map_area_linear - Map an area of memory into a device dma region.
1061 * @r: Pointer to a struct ps3_dma_region.
1062 * @virt_addr: Starting virtual address of the area to map.
1063 * @len: Length in bytes of the area to map.
1064 * @bus_addr: A pointer to return the starting ioc bus address of the area to
1067 * This routine just returns the corresponding bus address. Actual mapping
1068 * occurs in dma_region_create_linear().
1071 static int dma_sb_map_area_linear(struct ps3_dma_region *r,
1072 unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr,
1075 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
1077 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
1082 * dma_unmap_area_linear - Unmap an area of memory from a device dma region.
1083 * @r: Pointer to a struct ps3_dma_region.
1084 * @bus_addr: The starting ioc bus address of the area to unmap.
1085 * @len: Length in bytes of the area to unmap.
1087 * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear().
1090 static int dma_sb_unmap_area_linear(struct ps3_dma_region *r,
1091 dma_addr_t bus_addr, unsigned long len)
1096 static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = {
1097 .create = dma_sb_region_create,
1098 .free = dma_sb_region_free,
1099 .map = dma_sb_map_area,
1100 .unmap = dma_sb_unmap_area
1103 static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = {
1104 .create = dma_sb_region_create_linear,
1105 .free = dma_sb_region_free_linear,
1106 .map = dma_sb_map_area_linear,
1107 .unmap = dma_sb_unmap_area_linear
1110 static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = {
1111 .create = dma_ioc0_region_create,
1112 .free = dma_ioc0_region_free,
1113 .map = dma_ioc0_map_area,
1114 .unmap = dma_ioc0_unmap_area
1117 int ps3_dma_region_init(struct ps3_system_bus_device *dev,
1118 struct ps3_dma_region *r, enum ps3_dma_page_size page_size,
1119 enum ps3_dma_region_type region_type, void *addr, unsigned long len)
1121 unsigned long lpar_addr;
1124 lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
1127 r->page_size = page_size;
1128 r->region_type = region_type;
1129 r->offset = lpar_addr;
1130 if (r->offset >= map.rm.size)
1131 r->offset -= map.r1.offset;
1132 r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size);
1134 dev->core.dma_mask = &r->dma_mask;
1136 result = dma_set_mask_and_coherent(&dev->core, DMA_BIT_MASK(32));
1139 dev_err(&dev->core, "%s:%d: dma_set_mask_and_coherent failed: %d\n",
1140 __func__, __LINE__, result);
1144 switch (dev->dev_type) {
1145 case PS3_DEVICE_TYPE_SB:
1146 r->region_ops = (USE_DYNAMIC_DMA)
1147 ? &ps3_dma_sb_region_ops
1148 : &ps3_dma_sb_region_linear_ops;
1150 case PS3_DEVICE_TYPE_IOC0:
1151 r->region_ops = &ps3_dma_ioc0_region_ops;
1159 EXPORT_SYMBOL(ps3_dma_region_init);
1161 int ps3_dma_region_create(struct ps3_dma_region *r)
1164 BUG_ON(!r->region_ops);
1165 BUG_ON(!r->region_ops->create);
1166 return r->region_ops->create(r);
1168 EXPORT_SYMBOL(ps3_dma_region_create);
1170 int ps3_dma_region_free(struct ps3_dma_region *r)
1173 BUG_ON(!r->region_ops);
1174 BUG_ON(!r->region_ops->free);
1175 return r->region_ops->free(r);
1177 EXPORT_SYMBOL(ps3_dma_region_free);
1179 int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
1180 unsigned long len, dma_addr_t *bus_addr,
1183 return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
1186 int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr,
1189 return r->region_ops->unmap(r, bus_addr, len);
1192 /*============================================================================*/
1193 /* system startup routines */
1194 /*============================================================================*/
1197 * ps3_mm_init - initialize the address space state variables
1200 void __init ps3_mm_init(void)
1204 DBG(" -> %s:%d\n", __func__, __LINE__);
1206 result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
1210 panic("ps3_repository_read_mm_info() failed");
1212 map.rm.offset = map.rm.base;
1213 map.vas_id = map.htab_size = 0;
1215 /* this implementation assumes map.rm.base is zero */
1217 BUG_ON(map.rm.base);
1218 BUG_ON(!map.rm.size);
1220 /* Check if we got the highmem region from an earlier boot step */
1222 if (ps3_mm_get_repository_highmem(&map.r1)) {
1223 result = ps3_mm_region_create(&map.r1, map.total - map.rm.size);
1226 ps3_mm_set_repository_highmem(&map.r1);
1229 /* correct map.total for the real total amount of memory we use */
1230 map.total = map.rm.size + map.r1.size;
1233 DBG("%s:%d: No highmem region found\n", __func__, __LINE__);
1235 DBG("%s:%d: Adding highmem region: %llxh %llxh\n",
1236 __func__, __LINE__, map.rm.size,
1237 map.total - map.rm.size);
1238 memblock_add(map.rm.size, map.total - map.rm.size);
1241 DBG(" <- %s:%d\n", __func__, __LINE__);
1245 * ps3_mm_shutdown - final cleanup of address space
1248 void ps3_mm_shutdown(void)
1250 ps3_mm_region_destroy(&map.r1);