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>
25 #include <asm/firmware.h>
28 #include <asm/lv1call.h>
33 #define DBG udbg_printf
39 #if defined(CONFIG_PS3_USE_LPAR_ADDR)
44 #if defined(CONFIG_PS3_DYNAMIC_DMA)
57 static unsigned long make_page_sizes(unsigned long a, unsigned long b)
59 return (a << 56) | (b << 48);
63 ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
64 ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
67 /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
70 HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
71 HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
74 /*============================================================================*/
75 /* virtual address space routines */
76 /*============================================================================*/
79 * struct mem_region - memory region structure
81 * @size: size in bytes
82 * @offset: difference between base and rm.size
92 * struct map - address space state variables holder
93 * @total: total memory available as reported by HV
94 * @vas_id - HV virtual address space id
95 * @htab_size: htab size in bytes
97 * The HV virtual address space (vas) allows for hotplug memory regions.
98 * Memory regions can be created and destroyed in the vas at runtime.
99 * @rm: real mode (bootmem) region
100 * @r1: hotplug memory region(s)
103 * virt_addr: a cpu 'translated' effective address
104 * phys_addr: an address in what Linux thinks is the physical address space
105 * lpar_addr: an address in the HV virtual address space
106 * bus_addr: an io controller 'translated' address on a device bus
111 unsigned long vas_id;
112 unsigned long htab_size;
113 struct mem_region rm;
114 struct mem_region r1;
117 #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
118 static void __maybe_unused _debug_dump_map(const struct map *m,
119 const char *func, int line)
121 DBG("%s:%d: map.total = %lxh\n", func, line, m->total);
122 DBG("%s:%d: map.rm.size = %lxh\n", func, line, m->rm.size);
123 DBG("%s:%d: map.vas_id = %lu\n", func, line, m->vas_id);
124 DBG("%s:%d: map.htab_size = %lxh\n", func, line, m->htab_size);
125 DBG("%s:%d: map.r1.base = %lxh\n", func, line, m->r1.base);
126 DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
127 DBG("%s:%d: map.r1.size = %lxh\n", func, line, m->r1.size);
130 static struct map map;
133 * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
134 * @phys_addr: linux physical address
137 unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
139 BUG_ON(is_kernel_addr(phys_addr));
143 return (phys_addr < map.rm.size || phys_addr >= map.total)
144 ? phys_addr : phys_addr + map.r1.offset;
147 EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
150 * ps3_mm_vas_create - create the virtual address space
153 void __init ps3_mm_vas_create(unsigned long* htab_size)
156 unsigned long start_address;
158 unsigned long access_right;
159 unsigned long max_page_size;
162 result = lv1_query_logical_partition_address_region_info(0,
163 &start_address, &size, &access_right, &max_page_size,
167 DBG("%s:%d: lv1_query_logical_partition_address_region_info "
168 "failed: %s\n", __func__, __LINE__,
173 if (max_page_size < PAGE_SHIFT_16M) {
174 DBG("%s:%d: bad max_page_size %lxh\n", __func__, __LINE__,
179 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
180 BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
182 result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
183 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
184 &map.vas_id, &map.htab_size);
187 DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
188 __func__, __LINE__, ps3_result(result));
192 result = lv1_select_virtual_address_space(map.vas_id);
195 DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
196 __func__, __LINE__, ps3_result(result));
200 *htab_size = map.htab_size;
202 debug_dump_map(&map);
207 panic("ps3_mm_vas_create failed");
211 * ps3_mm_vas_destroy -
214 void ps3_mm_vas_destroy(void)
218 DBG("%s:%d: map.vas_id = %lu\n", __func__, __LINE__, map.vas_id);
221 result = lv1_select_virtual_address_space(0);
223 result = lv1_destruct_virtual_address_space(map.vas_id);
229 /*============================================================================*/
230 /* memory hotplug routines */
231 /*============================================================================*/
234 * ps3_mm_region_create - create a memory region in the vas
235 * @r: pointer to a struct mem_region to accept initialized values
236 * @size: requested region size
238 * This implementation creates the region with the vas large page size.
239 * @size is rounded down to a multiple of the vas large page size.
242 static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
247 r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
249 DBG("%s:%d requested %lxh\n", __func__, __LINE__, size);
250 DBG("%s:%d actual %lxh\n", __func__, __LINE__, r->size);
251 DBG("%s:%d difference %lxh (%luMB)\n", __func__, __LINE__,
252 (unsigned long)(size - r->size),
253 (size - r->size) / 1024 / 1024);
256 DBG("%s:%d: size == 0\n", __func__, __LINE__);
261 result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
262 ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
264 if (result || r->base < map.rm.size) {
265 DBG("%s:%d: lv1_allocate_memory failed: %s\n",
266 __func__, __LINE__, ps3_result(result));
270 r->offset = r->base - map.rm.size;
274 r->size = r->base = r->offset = 0;
279 * ps3_mm_region_destroy - destroy a memory region
280 * @r: pointer to struct mem_region
283 static void ps3_mm_region_destroy(struct mem_region *r)
287 DBG("%s:%d: r->base = %lxh\n", __func__, __LINE__, r->base);
289 result = lv1_release_memory(r->base);
291 r->size = r->base = r->offset = 0;
292 map.total = map.rm.size;
297 * ps3_mm_add_memory - hot add memory
300 static int __init ps3_mm_add_memory(void)
303 unsigned long start_addr;
304 unsigned long start_pfn;
305 unsigned long nr_pages;
307 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
310 BUG_ON(!mem_init_done);
312 start_addr = USE_LPAR_ADDR ? map.r1.base : map.rm.size;
313 start_pfn = start_addr >> PAGE_SHIFT;
314 nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT;
316 DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n",
317 __func__, __LINE__, start_addr, start_pfn, nr_pages);
319 result = add_memory(0, start_addr, map.r1.size);
322 DBG("%s:%d: add_memory failed: (%d)\n",
323 __func__, __LINE__, result);
327 result = online_pages(start_pfn, nr_pages);
330 DBG("%s:%d: online_pages failed: (%d)\n",
331 __func__, __LINE__, result);
336 core_initcall(ps3_mm_add_memory);
338 /*============================================================================*/
340 /*============================================================================*/
343 * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
344 * @r: pointer to dma region structure
345 * @lpar_addr: HV lpar address
348 static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r,
349 unsigned long lpar_addr)
351 if (lpar_addr >= map.rm.size)
352 lpar_addr -= map.r1.offset;
353 BUG_ON(lpar_addr < r->offset);
354 BUG_ON(lpar_addr >= r->offset + r->len);
355 return r->bus_addr + lpar_addr - r->offset;
358 #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
359 static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
360 const char *func, int line)
362 DBG("%s:%d: dev %u:%u\n", func, line, r->dev->bus_id,
364 DBG("%s:%d: page_size %u\n", func, line, r->page_size);
365 DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
366 DBG("%s:%d: len %lxh\n", func, line, r->len);
367 DBG("%s:%d: offset %lxh\n", func, line, r->offset);
371 * dma_chunk - A chunk of dma pages mapped by the io controller.
372 * @region - The dma region that owns this chunk.
373 * @lpar_addr: Starting lpar address of the area to map.
374 * @bus_addr: Starting ioc bus address of the area to map.
375 * @len: Length in bytes of the area to map.
376 * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
377 * list of all chuncks owned by the region.
379 * This implementation uses a very simple dma page manager
380 * based on the dma_chunk structure. This scheme assumes
381 * that all drivers use very well behaved dma ops.
385 struct ps3_dma_region *region;
386 unsigned long lpar_addr;
387 unsigned long bus_addr;
389 struct list_head link;
390 unsigned int usage_count;
393 #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
394 static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
397 DBG("%s:%d: r.dev %u:%u\n", func, line,
398 c->region->dev->bus_id, c->region->dev->dev_id);
399 DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr);
400 DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size);
401 DBG("%s:%d: r.len %lxh\n", func, line, c->region->len);
402 DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset);
403 DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr);
404 DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr);
405 DBG("%s:%d: c.len %lxh\n", func, line, c->len);
408 static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
409 unsigned long bus_addr, unsigned long len)
412 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size);
413 unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus,
416 list_for_each_entry(c, &r->chunk_list.head, link) {
418 if (aligned_bus >= c->bus_addr &&
419 aligned_bus + aligned_len <= c->bus_addr + c->len)
423 if (aligned_bus + aligned_len <= c->bus_addr)
427 if (aligned_bus >= c->bus_addr + c->len)
430 /* we don't handle the multi-chunk case for now */
437 static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
438 unsigned long lpar_addr, unsigned long len)
441 unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size);
442 unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar,
445 list_for_each_entry(c, &r->chunk_list.head, link) {
447 if (c->lpar_addr <= aligned_lpar &&
448 aligned_lpar < c->lpar_addr + c->len) {
449 if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
457 if (aligned_lpar + aligned_len <= c->lpar_addr) {
461 if (c->lpar_addr + c->len <= aligned_lpar) {
468 static int dma_sb_free_chunk(struct dma_chunk *c)
473 result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
474 c->region->dev->dev_id, c->bus_addr, c->len);
482 static int dma_ioc0_free_chunk(struct dma_chunk *c)
486 unsigned long offset;
487 struct ps3_dma_region *r = c->region;
489 DBG("%s:start\n", __func__);
490 for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
491 offset = (1 << r->page_size) * iopage;
492 /* put INVALID entry */
493 result = lv1_put_iopte(0,
494 c->bus_addr + offset,
495 c->lpar_addr + offset,
498 DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
499 c->bus_addr + offset,
500 c->lpar_addr + offset,
504 DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
505 __LINE__, ps3_result(result));
509 DBG("%s:end\n", __func__);
514 * dma_sb_map_pages - Maps dma pages into the io controller bus address space.
515 * @r: Pointer to a struct ps3_dma_region.
516 * @phys_addr: Starting physical address of the area to map.
517 * @len: Length in bytes of the area to map.
518 * c_out: A pointer to receive an allocated struct dma_chunk for this area.
520 * This is the lowest level dma mapping routine, and is the one that will
521 * make the HV call to add the pages into the io controller address space.
524 static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
525 unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
530 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
538 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
539 c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr);
542 BUG_ON(iopte_flag != 0xf800000000000000UL);
543 result = lv1_map_device_dma_region(c->region->dev->bus_id,
544 c->region->dev->dev_id, c->lpar_addr,
545 c->bus_addr, c->len, iopte_flag);
547 DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
548 __func__, __LINE__, ps3_result(result));
552 list_add(&c->link, &r->chunk_list.head);
561 DBG(" <- %s:%d\n", __func__, __LINE__);
565 static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
566 unsigned long len, struct dma_chunk **c_out,
570 struct dma_chunk *c, *last;
572 unsigned long offset;
574 DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
575 phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
576 c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
585 c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
586 /* allocate IO address */
587 if (list_empty(&r->chunk_list.head)) {
589 c->bus_addr = r->bus_addr;
591 /* derive from last bus addr*/
592 last = list_entry(r->chunk_list.head.next,
593 struct dma_chunk, link);
594 c->bus_addr = last->bus_addr + last->len;
595 DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
596 last->bus_addr, last->len);
599 /* FIXME: check whether length exceeds region size */
601 /* build ioptes for the area */
602 pages = len >> r->page_size;
603 DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#lx\n", __func__,
604 r->page_size, r->len, pages, iopte_flag);
605 for (iopage = 0; iopage < pages; iopage++) {
606 offset = (1 << r->page_size) * iopage;
607 result = lv1_put_iopte(0,
608 c->bus_addr + offset,
609 c->lpar_addr + offset,
613 printk(KERN_WARNING "%s:%d: lv1_map_device_dma_region "
614 "failed: %s\n", __func__, __LINE__,
618 DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
619 iopage, c->bus_addr + offset, c->lpar_addr + offset,
623 /* be sure that last allocated one is inserted at head */
624 list_add(&c->link, &r->chunk_list.head);
627 DBG("%s: end\n", __func__);
631 for (iopage--; 0 <= iopage; iopage--) {
633 c->bus_addr + offset,
634 c->lpar_addr + offset,
645 * dma_sb_region_create - Create a device dma region.
646 * @r: Pointer to a struct ps3_dma_region.
648 * This is the lowest level dma region create routine, and is the one that
649 * will make the HV call to create the region.
652 static int dma_sb_region_create(struct ps3_dma_region *r)
656 pr_info(" -> %s:%d:\n", __func__, __LINE__);
660 if (!r->dev->bus_id) {
661 pr_info("%s:%d: %u:%u no dma\n", __func__, __LINE__,
662 r->dev->bus_id, r->dev->dev_id);
666 DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
667 __LINE__, r->len, r->page_size, r->offset);
670 BUG_ON(!r->page_size);
671 BUG_ON(!r->region_ops);
673 INIT_LIST_HEAD(&r->chunk_list.head);
674 spin_lock_init(&r->chunk_list.lock);
676 result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
677 roundup_pow_of_two(r->len), r->page_size, r->region_type,
681 DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
682 __func__, __LINE__, ps3_result(result));
683 r->len = r->bus_addr = 0;
689 static int dma_ioc0_region_create(struct ps3_dma_region *r)
693 INIT_LIST_HEAD(&r->chunk_list.head);
694 spin_lock_init(&r->chunk_list.lock);
696 result = lv1_allocate_io_segment(0,
701 DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
702 __func__, __LINE__, ps3_result(result));
703 r->len = r->bus_addr = 0;
705 DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
706 r->len, r->page_size, r->bus_addr);
711 * dma_region_free - Free a device dma region.
712 * @r: Pointer to a struct ps3_dma_region.
714 * This is the lowest level dma region free routine, and is the one that
715 * will make the HV call to free the region.
718 static int dma_sb_region_free(struct ps3_dma_region *r)
722 struct dma_chunk *tmp;
726 if (!r->dev->bus_id) {
727 pr_info("%s:%d: %u:%u no dma\n", __func__, __LINE__,
728 r->dev->bus_id, r->dev->dev_id);
732 list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
734 dma_sb_free_chunk(c);
737 result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
741 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
742 __func__, __LINE__, ps3_result(result));
749 static int dma_ioc0_region_free(struct ps3_dma_region *r)
752 struct dma_chunk *c, *n;
754 DBG("%s: start\n", __func__);
755 list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
757 dma_ioc0_free_chunk(c);
760 result = lv1_release_io_segment(0, r->bus_addr);
763 DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
764 __func__, __LINE__, ps3_result(result));
767 DBG("%s: end\n", __func__);
773 * dma_sb_map_area - Map an area of memory into a device dma region.
774 * @r: Pointer to a struct ps3_dma_region.
775 * @virt_addr: Starting virtual address of the area to map.
776 * @len: Length in bytes of the area to map.
777 * @bus_addr: A pointer to return the starting ioc bus address of the area to
780 * This is the common dma mapping routine.
783 static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
784 unsigned long len, unsigned long *bus_addr,
790 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
792 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
793 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
795 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
797 if (!USE_DYNAMIC_DMA) {
798 unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
799 DBG(" -> %s:%d\n", __func__, __LINE__);
800 DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
802 DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
804 DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
806 DBG("%s:%d len %lxh\n", __func__, __LINE__, len);
807 DBG("%s:%d bus_addr %lxh (%lxh)\n", __func__, __LINE__,
811 spin_lock_irqsave(&r->chunk_list.lock, flags);
812 c = dma_find_chunk(r, *bus_addr, len);
815 DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
818 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
822 result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
826 DBG("%s:%d: dma_sb_map_pages failed (%d)\n",
827 __func__, __LINE__, result);
828 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
834 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
838 static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
839 unsigned long len, unsigned long *bus_addr,
845 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
847 unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
848 unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
851 DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
853 DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
854 phys_addr, aligned_phys, aligned_len);
856 spin_lock_irqsave(&r->chunk_list.lock, flags);
857 c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
862 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
864 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
868 result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
873 DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
874 __func__, __LINE__, result);
875 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
878 *bus_addr = c->bus_addr + phys_addr - aligned_phys;
879 DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#lx\n", __func__,
880 virt_addr, phys_addr, aligned_phys, *bus_addr);
883 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
888 * dma_sb_unmap_area - Unmap an area of memory from a device dma region.
889 * @r: Pointer to a struct ps3_dma_region.
890 * @bus_addr: The starting ioc bus address of the area to unmap.
891 * @len: Length in bytes of the area to unmap.
893 * This is the common dma unmap routine.
896 static int dma_sb_unmap_area(struct ps3_dma_region *r, unsigned long bus_addr,
902 spin_lock_irqsave(&r->chunk_list.lock, flags);
903 c = dma_find_chunk(r, bus_addr, len);
906 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
908 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
909 - aligned_bus, 1 << r->page_size);
910 DBG("%s:%d: not found: bus_addr %lxh\n",
911 __func__, __LINE__, bus_addr);
912 DBG("%s:%d: not found: len %lxh\n",
913 __func__, __LINE__, len);
914 DBG("%s:%d: not found: aligned_bus %lxh\n",
915 __func__, __LINE__, aligned_bus);
916 DBG("%s:%d: not found: aligned_len %lxh\n",
917 __func__, __LINE__, aligned_len);
923 if (!c->usage_count) {
925 dma_sb_free_chunk(c);
928 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
932 static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
933 unsigned long bus_addr, unsigned long len)
938 DBG("%s: start a=%#lx l=%#lx\n", __func__, bus_addr, len);
939 spin_lock_irqsave(&r->chunk_list.lock, flags);
940 c = dma_find_chunk(r, bus_addr, len);
943 unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
945 unsigned long aligned_len = _ALIGN_UP(len + bus_addr
948 DBG("%s:%d: not found: bus_addr %lxh\n",
949 __func__, __LINE__, bus_addr);
950 DBG("%s:%d: not found: len %lxh\n",
951 __func__, __LINE__, len);
952 DBG("%s:%d: not found: aligned_bus %lxh\n",
953 __func__, __LINE__, aligned_bus);
954 DBG("%s:%d: not found: aligned_len %lxh\n",
955 __func__, __LINE__, aligned_len);
961 if (!c->usage_count) {
963 dma_ioc0_free_chunk(c);
966 spin_unlock_irqrestore(&r->chunk_list.lock, flags);
967 DBG("%s: end\n", __func__);
972 * dma_sb_region_create_linear - Setup a linear dma mapping for a device.
973 * @r: Pointer to a struct ps3_dma_region.
975 * This routine creates an HV dma region for the device and maps all available
976 * ram into the io controller bus address space.
979 static int dma_sb_region_create_linear(struct ps3_dma_region *r)
982 unsigned long virt_addr, len, tmp;
984 if (r->len > 16*1024*1024) { /* FIXME: need proper fix */
985 /* force 16M dma pages for linear mapping */
986 if (r->page_size != PS3_DMA_16M) {
987 pr_info("%s:%d: forcing 16M pages for linear map\n",
989 r->page_size = PS3_DMA_16M;
990 r->len = _ALIGN_UP(r->len, 1 << r->page_size);
994 result = dma_sb_region_create(r);
997 if (r->offset < map.rm.size) {
998 /* Map (part of) 1st RAM chunk */
999 virt_addr = map.rm.base + r->offset;
1000 len = map.rm.size - r->offset;
1003 result = dma_sb_map_area(r, virt_addr, len, &tmp,
1004 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
1008 if (r->offset + r->len > map.rm.size) {
1009 /* Map (part of) 2nd RAM chunk */
1010 virt_addr = USE_LPAR_ADDR ? map.r1.base : map.rm.size;
1012 if (r->offset >= map.rm.size)
1013 virt_addr += r->offset - map.rm.size;
1015 len -= map.rm.size - r->offset;
1016 result = dma_sb_map_area(r, virt_addr, len, &tmp,
1017 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
1025 * dma_sb_region_free_linear - Free a linear dma mapping for a device.
1026 * @r: Pointer to a struct ps3_dma_region.
1028 * This routine will unmap all mapped areas and free the HV dma region.
1031 static int dma_sb_region_free_linear(struct ps3_dma_region *r)
1034 unsigned long bus_addr, len, lpar_addr;
1036 if (r->offset < map.rm.size) {
1037 /* Unmap (part of) 1st RAM chunk */
1038 lpar_addr = map.rm.base + r->offset;
1039 len = map.rm.size - r->offset;
1042 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1043 result = dma_sb_unmap_area(r, bus_addr, len);
1047 if (r->offset + r->len > map.rm.size) {
1048 /* Unmap (part of) 2nd RAM chunk */
1049 lpar_addr = map.r1.base;
1051 if (r->offset >= map.rm.size)
1052 lpar_addr += r->offset - map.rm.size;
1054 len -= map.rm.size - r->offset;
1055 bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1056 result = dma_sb_unmap_area(r, bus_addr, len);
1060 result = dma_sb_region_free(r);
1067 * dma_sb_map_area_linear - Map an area of memory into a device dma region.
1068 * @r: Pointer to a struct ps3_dma_region.
1069 * @virt_addr: Starting virtual address of the area to map.
1070 * @len: Length in bytes of the area to map.
1071 * @bus_addr: A pointer to return the starting ioc bus address of the area to
1074 * This routine just returns the corresponding bus address. Actual mapping
1075 * occurs in dma_region_create_linear().
1078 static int dma_sb_map_area_linear(struct ps3_dma_region *r,
1079 unsigned long virt_addr, unsigned long len, unsigned long *bus_addr,
1082 unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
1084 *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
1089 * dma_unmap_area_linear - Unmap an area of memory from a device dma region.
1090 * @r: Pointer to a struct ps3_dma_region.
1091 * @bus_addr: The starting ioc bus address of the area to unmap.
1092 * @len: Length in bytes of the area to unmap.
1094 * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear().
1097 static int dma_sb_unmap_area_linear(struct ps3_dma_region *r,
1098 unsigned long bus_addr, unsigned long len)
1103 static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = {
1104 .create = dma_sb_region_create,
1105 .free = dma_sb_region_free,
1106 .map = dma_sb_map_area,
1107 .unmap = dma_sb_unmap_area
1110 static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = {
1111 .create = dma_sb_region_create_linear,
1112 .free = dma_sb_region_free_linear,
1113 .map = dma_sb_map_area_linear,
1114 .unmap = dma_sb_unmap_area_linear
1117 static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = {
1118 .create = dma_ioc0_region_create,
1119 .free = dma_ioc0_region_free,
1120 .map = dma_ioc0_map_area,
1121 .unmap = dma_ioc0_unmap_area
1124 int ps3_dma_region_init(struct ps3_system_bus_device *dev,
1125 struct ps3_dma_region *r, enum ps3_dma_page_size page_size,
1126 enum ps3_dma_region_type region_type, void *addr, unsigned long len)
1128 unsigned long lpar_addr;
1130 lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
1133 r->page_size = page_size;
1134 r->region_type = region_type;
1135 r->offset = lpar_addr;
1136 if (r->offset >= map.rm.size)
1137 r->offset -= map.r1.offset;
1138 r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size);
1140 switch (dev->dev_type) {
1141 case PS3_DEVICE_TYPE_SB:
1142 r->region_ops = (USE_DYNAMIC_DMA)
1143 ? &ps3_dma_sb_region_ops
1144 : &ps3_dma_sb_region_linear_ops;
1146 case PS3_DEVICE_TYPE_IOC0:
1147 r->region_ops = &ps3_dma_ioc0_region_ops;
1155 EXPORT_SYMBOL(ps3_dma_region_init);
1157 int ps3_dma_region_create(struct ps3_dma_region *r)
1160 BUG_ON(!r->region_ops);
1161 BUG_ON(!r->region_ops->create);
1162 return r->region_ops->create(r);
1164 EXPORT_SYMBOL(ps3_dma_region_create);
1166 int ps3_dma_region_free(struct ps3_dma_region *r)
1169 BUG_ON(!r->region_ops);
1170 BUG_ON(!r->region_ops->free);
1171 return r->region_ops->free(r);
1173 EXPORT_SYMBOL(ps3_dma_region_free);
1175 int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
1176 unsigned long len, unsigned long *bus_addr,
1179 return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
1182 int ps3_dma_unmap(struct ps3_dma_region *r, unsigned long bus_addr,
1185 return r->region_ops->unmap(r, bus_addr, len);
1188 /*============================================================================*/
1189 /* system startup routines */
1190 /*============================================================================*/
1193 * ps3_mm_init - initialize the address space state variables
1196 void __init ps3_mm_init(void)
1200 DBG(" -> %s:%d\n", __func__, __LINE__);
1202 result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
1206 panic("ps3_repository_read_mm_info() failed");
1208 map.rm.offset = map.rm.base;
1209 map.vas_id = map.htab_size = 0;
1211 /* this implementation assumes map.rm.base is zero */
1213 BUG_ON(map.rm.base);
1214 BUG_ON(!map.rm.size);
1217 /* arrange to do this in ps3_mm_add_memory */
1218 ps3_mm_region_create(&map.r1, map.total - map.rm.size);
1220 /* correct map.total for the real total amount of memory we use */
1221 map.total = map.rm.size + map.r1.size;
1223 DBG(" <- %s:%d\n", __func__, __LINE__);
1227 * ps3_mm_shutdown - final cleanup of address space
1230 void ps3_mm_shutdown(void)
1232 ps3_mm_region_destroy(&map.r1);