2 * PS3 address space management.
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
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.
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.
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
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/memory_hotplug.h>
24 #include <linux/lmb.h>
26 #include <asm/firmware.h>
29 #include <asm/lv1call.h>
34 #define DBG udbg_printf
40 #if defined(CONFIG_PS3_DYNAMIC_DMA)
53 static unsigned long make_page_sizes(unsigned long a, unsigned long b)
55 return (a << 56) | (b << 48);
59 ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
60 ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
63 /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
66 HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
67 HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
70 /*============================================================================*/
71 /* virtual address space routines */
72 /*============================================================================*/
75 * struct mem_region - memory region structure
77 * @size: size in bytes
78 * @offset: difference between base and rm.size
88 * struct map - address space state variables holder
89 * @total: total memory available as reported by HV
90 * @vas_id - HV virtual address space id
91 * @htab_size: htab size in bytes
93 * The HV virtual address space (vas) allows for hotplug memory regions.
94 * Memory regions can be created and destroyed in the vas at runtime.
95 * @rm: real mode (bootmem) region
96 * @r1: hotplug memory region(s)
99 * virt_addr: a cpu 'translated' effective address
100 * phys_addr: an address in what Linux thinks is the physical address space
101 * lpar_addr: an address in the HV virtual address space
102 * bus_addr: an io controller 'translated' address on a device bus
107 unsigned long vas_id;
108 unsigned long htab_size;
109 struct mem_region rm;
110 struct mem_region r1;
113 #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
114 static void __maybe_unused _debug_dump_map(const struct map *m,
115 const char *func, int line)
117 DBG("%s:%d: map.total = %lxh\n", func, line, m->total);
118 DBG("%s:%d: map.rm.size = %lxh\n", func, line, m->rm.size);
119 DBG("%s:%d: map.vas_id = %lu\n", func, line, m->vas_id);
120 DBG("%s:%d: map.htab_size = %lxh\n", func, line, m->htab_size);
121 DBG("%s:%d: map.r1.base = %lxh\n", func, line, m->r1.base);
122 DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
123 DBG("%s:%d: map.r1.size = %lxh\n", func, line, m->r1.size);
126 static struct map map;
129 * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
130 * @phys_addr: linux physical address
133 unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
135 BUG_ON(is_kernel_addr(phys_addr));
136 return (phys_addr < map.rm.size || phys_addr >= map.total)
137 ? phys_addr : phys_addr + map.r1.offset;
140 EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
143 * ps3_mm_vas_create - create the virtual address space
146 void __init ps3_mm_vas_create(unsigned long* htab_size)
149 unsigned long start_address;
151 unsigned long access_right;
152 unsigned long max_page_size;
155 result = lv1_query_logical_partition_address_region_info(0,
156 &start_address, &size, &access_right, &max_page_size,
160 DBG("%s:%d: lv1_query_logical_partition_address_region_info "
161 "failed: %s\n", __func__, __LINE__,
166 if (max_page_size < PAGE_SHIFT_16M) {
167 DBG("%s:%d: bad max_page_size %lxh\n", __func__, __LINE__,
172 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
173 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
175 result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
176 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
177 &map.vas_id, &map.htab_size);
180 DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
181 __func__, __LINE__, ps3_result(result));
185 result = lv1_select_virtual_address_space(map.vas_id);
188 DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
189 __func__, __LINE__, ps3_result(result));
193 *htab_size = map.htab_size;
195 debug_dump_map(&map);
200 panic("ps3_mm_vas_create failed");
204 * ps3_mm_vas_destroy -
207 void ps3_mm_vas_destroy(void)
211 DBG("%s:%d: map.vas_id = %lu\n", __func__, __LINE__, map.vas_id);
214 result = lv1_select_virtual_address_space(0);
216 result = lv1_destruct_virtual_address_space(map.vas_id);
222 /*============================================================================*/
223 /* memory hotplug routines */
224 /*============================================================================*/
227 * ps3_mm_region_create - create a memory region in the vas
228 * @r: pointer to a struct mem_region to accept initialized values
229 * @size: requested region size
231 * This implementation creates the region with the vas large page size.
232 * @size is rounded down to a multiple of the vas large page size.
235 static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
240 r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
242 DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
243 DBG("%s:%d actual %lxh\n", __func__, __LINE__, r->size);
244 DBG("%s:%d difference %lxh (%luMB)\n", __func__, __LINE__,
245 (unsigned long)(size - r->size),
246 (size - r->size) / 1024 / 1024);
249 DBG("%s:%d: size == 0\n", __func__, __LINE__);
254 result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
255 ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
257 if (result || r->base < map.rm.size) {
258 DBG("%s:%d: lv1_allocate_memory failed: %s\n",
259 __func__, __LINE__, ps3_result(result));
263 r->offset = r->base - map.rm.size;
267 r->size = r->base = r->offset = 0;
272 * ps3_mm_region_destroy - destroy a memory region
273 * @r: pointer to struct mem_region
276 static void ps3_mm_region_destroy(struct mem_region *r)
280 DBG("%s:%d: r->base = %lxh\n", __func__, __LINE__, r->base);
282 result = lv1_release_memory(r->base);
284 r->size = r->base = r->offset = 0;
285 map.total = map.rm.size;
290 * ps3_mm_add_memory - hot add memory
293 static int __init ps3_mm_add_memory(void)
296 unsigned long start_addr;
297 unsigned long start_pfn;
298 unsigned long nr_pages;
300 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
303 BUG_ON(!mem_init_done);
305 start_addr = map.rm.size;
306 start_pfn = start_addr >> PAGE_SHIFT;
307 nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT;
309 DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n",
310 __func__, __LINE__, start_addr, start_pfn, nr_pages);
312 result = add_memory(0, start_addr, map.r1.size);
315 DBG("%s:%d: add_memory failed: (%d)\n",
316 __func__, __LINE__, result);
320 result = online_pages(start_pfn, nr_pages);
323 DBG("%s:%d: online_pages failed: (%d)\n",
324 __func__, __LINE__, result);
329 core_initcall(ps3_mm_add_memory);
331 /*============================================================================*/
333 /*============================================================================*/
336 * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
337 * @r: pointer to dma region structure
338 * @lpar_addr: HV lpar address
341 static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r,
342 unsigned long lpar_addr)
344 if (lpar_addr >= map.rm.size)
345 lpar_addr -= map.r1.offset;
346 BUG_ON(lpar_addr < r->offset);
347 BUG_ON(lpar_addr >= r->offset + r->len);
348 return r->bus_addr + lpar_addr - r->offset;
351 #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
352 static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
353 const char *func, int line)
355 DBG("%s:%d: dev %lu:%lu\n", func, line, r->dev->bus_id,
357 DBG("%s:%d: page_size %u\n", func, line, r->page_size);
358 DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
359 DBG("%s:%d: len %lxh\n", func, line, r->len);
360 DBG("%s:%d: offset %lxh\n", func, line, r->offset);
364 * dma_chunk - A chunk of dma pages mapped by the io controller.
365 * @region - The dma region that owns this chunk.
366 * @lpar_addr: Starting lpar address of the area to map.
367 * @bus_addr: Starting ioc bus address of the area to map.
368 * @len: Length in bytes of the area to map.
369 * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
370 * list of all chuncks owned by the region.
372 * This implementation uses a very simple dma page manager
373 * based on the dma_chunk structure. This scheme assumes
374 * that all drivers use very well behaved dma ops.
378 struct ps3_dma_region *region;
379 unsigned long lpar_addr;
380 unsigned long bus_addr;
382 struct list_head link;
383 unsigned int usage_count;
386 #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
387 static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
390 DBG("%s:%d: r.dev %lu:%lu\n", func, line,
391 c->region->dev->bus_id, c->region->dev->dev_id);
392 DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr);
393 DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size);
394 DBG("%s:%d: r.len %lxh\n", func, line, c->region->len);
395 DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset);
396 DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr);
397 DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr);
398 DBG("%s:%d: c.len %lxh\n", func, line, c->len);
401 static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
402 unsigned long bus_addr, unsigned long len)
405 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size);
406 unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus,
409 list_for_each_entry(c, &r->chunk_list.head, link) {
411 if (aligned_bus >= c->bus_addr &&
412 aligned_bus + aligned_len <= c->bus_addr + c->len)
416 if (aligned_bus + aligned_len <= c->bus_addr)
420 if (aligned_bus >= c->bus_addr + c->len)
423 /* we don't handle the multi-chunk case for now */
430 static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
431 unsigned long lpar_addr, unsigned long len)
434 unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size);
435 unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar,
438 list_for_each_entry(c, &r->chunk_list.head, link) {
440 if (c->lpar_addr <= aligned_lpar &&
441 aligned_lpar < c->lpar_addr + c->len) {
442 if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
450 if (aligned_lpar + aligned_len <= c->lpar_addr) {
454 if (c->lpar_addr + c->len <= aligned_lpar) {
461 static int dma_sb_free_chunk(struct dma_chunk *c)
466 result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
467 c->region->dev->dev_id, c->bus_addr, c->len);
475 static int dma_ioc0_free_chunk(struct dma_chunk *c)
479 unsigned long offset;
480 struct ps3_dma_region *r = c->region;
482 DBG("%s:start\n", __func__);
483 for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
484 offset = (1 << r->page_size) * iopage;
485 /* put INVALID entry */
486 result = lv1_put_iopte(0,
487 c->bus_addr + offset,
488 c->lpar_addr + offset,
491 DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
492 c->bus_addr + offset,
493 c->lpar_addr + offset,
497 DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
498 __LINE__, ps3_result(result));
502 DBG("%s:end\n", __func__);
507 * dma_sb_map_pages - Maps dma pages into the io controller bus address space.
508 * @r: Pointer to a struct ps3_dma_region.
509 * @phys_addr: Starting physical address of the area to map.
510 * @len: Length in bytes of the area to map.
511 * c_out: A pointer to receive an allocated struct dma_chunk for this area.
513 * This is the lowest level dma mapping routine, and is the one that will
514 * make the HV call to add the pages into the io controller address space.
517 static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
518 unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
523 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
531 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
532 c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr);
535 BUG_ON(iopte_flag != 0xf800000000000000UL);
536 result = lv1_map_device_dma_region(c->region->dev->bus_id,
537 c->region->dev->dev_id, c->lpar_addr,
538 c->bus_addr, c->len, iopte_flag);
540 DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
541 __func__, __LINE__, ps3_result(result));
545 list_add(&c->link, &r->chunk_list.head);
554 DBG(" <- %s:%d\n", __func__, __LINE__);
558 static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
559 unsigned long len, struct dma_chunk **c_out,
563 struct dma_chunk *c, *last;
565 unsigned long offset;
567 DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
568 phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
569 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
578 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
579 /* allocate IO address */
580 if (list_empty(&r->chunk_list.head)) {
582 c->bus_addr = r->bus_addr;
584 /* derive from last bus addr*/
585 last = list_entry(r->chunk_list.head.next,
586 struct dma_chunk, link);
587 c->bus_addr = last->bus_addr + last->len;
588 DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
589 last->bus_addr, last->len);
592 /* FIXME: check whether length exceeds region size */
594 /* build ioptes for the area */
595 pages = len >> r->page_size;
596 DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#lx\n", __func__,
597 r->page_size, r->len, pages, iopte_flag);
598 for (iopage = 0; iopage < pages; iopage++) {
599 offset = (1 << r->page_size) * iopage;
600 result = lv1_put_iopte(0,
601 c->bus_addr + offset,
602 c->lpar_addr + offset,
606 printk(KERN_WARNING "%s:%d: lv1_map_device_dma_region "
607 "failed: %s\n", __func__, __LINE__,
611 DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
612 iopage, c->bus_addr + offset, c->lpar_addr + offset,
616 /* be sure that last allocated one is inserted at head */
617 list_add(&c->link, &r->chunk_list.head);
620 DBG("%s: end\n", __func__);
624 for (iopage--; 0 <= iopage; iopage--) {
626 c->bus_addr + offset,
627 c->lpar_addr + offset,
638 * dma_sb_region_create - Create a device dma region.
639 * @r: Pointer to a struct ps3_dma_region.
641 * This is the lowest level dma region create routine, and is the one that
642 * will make the HV call to create the region.
645 static int dma_sb_region_create(struct ps3_dma_region *r)
649 pr_info(" -> %s:%d:\n", __func__, __LINE__);
653 if (!r->dev->bus_id) {
654 pr_info("%s:%d: %lu:%lu no dma\n", __func__, __LINE__,
655 r->dev->bus_id, r->dev->dev_id);
659 DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
660 __LINE__, r->len, r->page_size, r->offset);
663 BUG_ON(!r->page_size);
664 BUG_ON(!r->region_ops);
666 INIT_LIST_HEAD(&r->chunk_list.head);
667 spin_lock_init(&r->chunk_list.lock);
669 result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
670 roundup_pow_of_two(r->len), r->page_size, r->region_type,
674 DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
675 __func__, __LINE__, ps3_result(result));
676 r->len = r->bus_addr = 0;
682 static int dma_ioc0_region_create(struct ps3_dma_region *r)
686 INIT_LIST_HEAD(&r->chunk_list.head);
687 spin_lock_init(&r->chunk_list.lock);
689 result = lv1_allocate_io_segment(0,
694 DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
695 __func__, __LINE__, ps3_result(result));
696 r->len = r->bus_addr = 0;
698 DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
699 r->len, r->page_size, r->bus_addr);
704 * dma_region_free - Free a device dma region.
705 * @r: Pointer to a struct ps3_dma_region.
707 * This is the lowest level dma region free routine, and is the one that
708 * will make the HV call to free the region.
711 static int dma_sb_region_free(struct ps3_dma_region *r)
715 struct dma_chunk *tmp;
719 if (!r->dev->bus_id) {
720 pr_info("%s:%d: %lu:%lu no dma\n", __func__, __LINE__,
721 r->dev->bus_id, r->dev->dev_id);
725 list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
727 dma_sb_free_chunk(c);
730 result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
734 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
735 __func__, __LINE__, ps3_result(result));
742 static int dma_ioc0_region_free(struct ps3_dma_region *r)
745 struct dma_chunk *c, *n;
747 DBG("%s: start\n", __func__);
748 list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
750 dma_ioc0_free_chunk(c);
753 result = lv1_release_io_segment(0, r->bus_addr);
756 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
757 __func__, __LINE__, ps3_result(result));
760 DBG("%s: end\n", __func__);
766 * dma_sb_map_area - Map an area of memory into a device dma region.
767 * @r: Pointer to a struct ps3_dma_region.
768 * @virt_addr: Starting virtual address of the area to map.
769 * @len: Length in bytes of the area to map.
770 * @bus_addr: A pointer to return the starting ioc bus address of the area to
773 * This is the common dma mapping routine.
776 static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
777 unsigned long len, unsigned long *bus_addr,
783 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
785 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
786 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
788 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
790 if (!USE_DYNAMIC_DMA) {
791 unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
792 DBG(" -> %s:%d\n", __func__, __LINE__);
793 DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
795 DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
797 DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
799 DBG("%s:%d len %lxh\n", __func__, __LINE__, len);
800 DBG("%s:%d bus_addr %lxh (%lxh)\n", __func__, __LINE__,
804 spin_lock_irqsave(&r->chunk_list.lock, flags);
805 c = dma_find_chunk(r, *bus_addr, len);
808 DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
811 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
815 result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
819 DBG("%s:%d: dma_sb_map_pages failed (%d)\n",
820 __func__, __LINE__, result);
821 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
827 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
831 static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
832 unsigned long len, unsigned long *bus_addr,
838 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
840 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
841 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
844 DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
846 DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
847 phys_addr, aligned_phys, aligned_len);
849 spin_lock_irqsave(&r->chunk_list.lock, flags);
850 c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
855 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
857 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
861 result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
866 DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
867 __func__, __LINE__, result);
868 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
871 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
872 DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#lx\n", __func__,
873 virt_addr, phys_addr, aligned_phys, *bus_addr);
876 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
881 * dma_sb_unmap_area - Unmap an area of memory from a device dma region.
882 * @r: Pointer to a struct ps3_dma_region.
883 * @bus_addr: The starting ioc bus address of the area to unmap.
884 * @len: Length in bytes of the area to unmap.
886 * This is the common dma unmap routine.
889 static int dma_sb_unmap_area(struct ps3_dma_region *r, unsigned long bus_addr,
895 spin_lock_irqsave(&r->chunk_list.lock, flags);
896 c = dma_find_chunk(r, bus_addr, len);
899 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
901 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
902 - aligned_bus, 1 << r->page_size);
903 DBG("%s:%d: not found: bus_addr %lxh\n",
904 __func__, __LINE__, bus_addr);
905 DBG("%s:%d: not found: len %lxh\n",
906 __func__, __LINE__, len);
907 DBG("%s:%d: not found: aligned_bus %lxh\n",
908 __func__, __LINE__, aligned_bus);
909 DBG("%s:%d: not found: aligned_len %lxh\n",
910 __func__, __LINE__, aligned_len);
916 if (!c->usage_count) {
918 dma_sb_free_chunk(c);
921 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
925 static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
926 unsigned long bus_addr, unsigned long len)
931 DBG("%s: start a=%#lx l=%#lx\n", __func__, bus_addr, len);
932 spin_lock_irqsave(&r->chunk_list.lock, flags);
933 c = dma_find_chunk(r, bus_addr, len);
936 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
938 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
941 DBG("%s:%d: not found: bus_addr %lxh\n",
942 __func__, __LINE__, bus_addr);
943 DBG("%s:%d: not found: len %lxh\n",
944 __func__, __LINE__, len);
945 DBG("%s:%d: not found: aligned_bus %lxh\n",
946 __func__, __LINE__, aligned_bus);
947 DBG("%s:%d: not found: aligned_len %lxh\n",
948 __func__, __LINE__, aligned_len);
954 if (!c->usage_count) {
956 dma_ioc0_free_chunk(c);
959 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
960 DBG("%s: end\n", __func__);
965 * dma_sb_region_create_linear - Setup a linear dma mapping for a device.
966 * @r: Pointer to a struct ps3_dma_region.
968 * This routine creates an HV dma region for the device and maps all available
969 * ram into the io controller bus address space.
972 static int dma_sb_region_create_linear(struct ps3_dma_region *r)
975 unsigned long virt_addr, len, tmp;
977 if (r->len > 16*1024*1024) { /* FIXME: need proper fix */
978 /* force 16M dma pages for linear mapping */
979 if (r->page_size != PS3_DMA_16M) {
980 pr_info("%s:%d: forcing 16M pages for linear map\n",
982 r->page_size = PS3_DMA_16M;
983 r->len = _ALIGN_UP(r->len, 1 << r->page_size);
987 result = dma_sb_region_create(r);
990 if (r->offset < map.rm.size) {
991 /* Map (part of) 1st RAM chunk */
992 virt_addr = map.rm.base + r->offset;
993 len = map.rm.size - r->offset;
996 result = dma_sb_map_area(r, virt_addr, len, &tmp,
997 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
1001 if (r->offset + r->len > map.rm.size) {
1002 /* Map (part of) 2nd RAM chunk */
1003 virt_addr = map.rm.size;
1005 if (r->offset >= map.rm.size)
1006 virt_addr += r->offset - map.rm.size;
1008 len -= map.rm.size - r->offset;
1009 result = dma_sb_map_area(r, virt_addr, len, &tmp,
1010 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
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 unsigned long bus_addr, 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, unsigned long *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 unsigned long 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;
1123 lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
1126 r->page_size = page_size;
1127 r->region_type = region_type;
1128 r->offset = lpar_addr;
1129 if (r->offset >= map.rm.size)
1130 r->offset -= map.r1.offset;
1131 r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size);
1133 switch (dev->dev_type) {
1134 case PS3_DEVICE_TYPE_SB:
1135 r->region_ops = (USE_DYNAMIC_DMA)
1136 ? &ps3_dma_sb_region_ops
1137 : &ps3_dma_sb_region_linear_ops;
1139 case PS3_DEVICE_TYPE_IOC0:
1140 r->region_ops = &ps3_dma_ioc0_region_ops;
1148 EXPORT_SYMBOL(ps3_dma_region_init);
1150 int ps3_dma_region_create(struct ps3_dma_region *r)
1153 BUG_ON(!r->region_ops);
1154 BUG_ON(!r->region_ops->create);
1155 return r->region_ops->create(r);
1157 EXPORT_SYMBOL(ps3_dma_region_create);
1159 int ps3_dma_region_free(struct ps3_dma_region *r)
1162 BUG_ON(!r->region_ops);
1163 BUG_ON(!r->region_ops->free);
1164 return r->region_ops->free(r);
1166 EXPORT_SYMBOL(ps3_dma_region_free);
1168 int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
1169 unsigned long len, unsigned long *bus_addr,
1172 return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
1175 int ps3_dma_unmap(struct ps3_dma_region *r, unsigned long bus_addr,
1178 return r->region_ops->unmap(r, bus_addr, len);
1181 /*============================================================================*/
1182 /* system startup routines */
1183 /*============================================================================*/
1186 * ps3_mm_init - initialize the address space state variables
1189 void __init ps3_mm_init(void)
1193 DBG(" -> %s:%d\n", __func__, __LINE__);
1195 result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
1199 panic("ps3_repository_read_mm_info() failed");
1201 map.rm.offset = map.rm.base;
1202 map.vas_id = map.htab_size = 0;
1204 /* this implementation assumes map.rm.base is zero */
1206 BUG_ON(map.rm.base);
1207 BUG_ON(!map.rm.size);
1210 /* arrange to do this in ps3_mm_add_memory */
1211 ps3_mm_region_create(&map.r1, map.total - map.rm.size);
1213 /* correct map.total for the real total amount of memory we use */
1214 map.total = map.rm.size + map.r1.size;
1216 DBG(" <- %s:%d\n", __func__, __LINE__);
1220 * ps3_mm_shutdown - final cleanup of address space
1223 void ps3_mm_shutdown(void)
1225 ps3_mm_region_destroy(&map.r1);