/* * PS3 address space management. * * Copyright (C) 2006 Sony Computer Entertainment Inc. * Copyright 2006 Sony Corp. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include "platform.h" #if defined(DEBUG) #define DBG(fmt...) udbg_printf(fmt) #else #define DBG(fmt...) do{if(0)printk(fmt);}while(0) #endif enum { #if defined(CONFIG_PS3_USE_LPAR_ADDR) USE_LPAR_ADDR = 1, #else USE_LPAR_ADDR = 0, #endif #if defined(CONFIG_PS3_DYNAMIC_DMA) USE_DYNAMIC_DMA = 1, #else USE_DYNAMIC_DMA = 0, #endif }; enum { PAGE_SHIFT_4K = 12U, PAGE_SHIFT_64K = 16U, PAGE_SHIFT_16M = 24U, }; static unsigned long make_page_sizes(unsigned long a, unsigned long b) { return (a << 56) | (b << 48); } enum { ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04, ALLOCATE_MEMORY_ADDR_ZERO = 0X08, }; /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */ enum { HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */ HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */ }; /*============================================================================*/ /* virtual address space routines */ /*============================================================================*/ /** * struct mem_region - memory region structure * @base: base address * @size: size in bytes * @offset: difference between base and rm.size */ struct mem_region { unsigned long base; unsigned long size; unsigned long offset; }; /** * struct map - address space state variables holder * @total: total memory available as reported by HV * @vas_id - HV virtual address space id * @htab_size: htab size in bytes * * The HV virtual address space (vas) allows for hotplug memory regions. * Memory regions can be created and destroyed in the vas at runtime. * @rm: real mode (bootmem) region * @r1: hotplug memory region(s) * * ps3 addresses * virt_addr: a cpu 'translated' effective address * phys_addr: an address in what Linux thinks is the physical address space * lpar_addr: an address in the HV virtual address space * bus_addr: an io controller 'translated' address on a device bus */ struct map { unsigned long total; unsigned long vas_id; unsigned long htab_size; struct mem_region rm; struct mem_region r1; }; #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) static void _debug_dump_map(const struct map* m, const char* func, int line) { DBG("%s:%d: map.total = %lxh\n", func, line, m->total); DBG("%s:%d: map.rm.size = %lxh\n", func, line, m->rm.size); DBG("%s:%d: map.vas_id = %lu\n", func, line, m->vas_id); DBG("%s:%d: map.htab_size = %lxh\n", func, line, m->htab_size); DBG("%s:%d: map.r1.base = %lxh\n", func, line, m->r1.base); DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset); DBG("%s:%d: map.r1.size = %lxh\n", func, line, m->r1.size); } static struct map map; /** * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address * @phys_addr: linux physical address */ unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr) { BUG_ON(is_kernel_addr(phys_addr)); if (USE_LPAR_ADDR) return phys_addr; else return (phys_addr < map.rm.size || phys_addr >= map.total) ? phys_addr : phys_addr + map.r1.offset; } EXPORT_SYMBOL(ps3_mm_phys_to_lpar); /** * ps3_mm_vas_create - create the virtual address space */ void __init ps3_mm_vas_create(unsigned long* htab_size) { int result; unsigned long start_address; unsigned long size; unsigned long access_right; unsigned long max_page_size; unsigned long flags; result = lv1_query_logical_partition_address_region_info(0, &start_address, &size, &access_right, &max_page_size, &flags); if (result) { DBG("%s:%d: lv1_query_logical_partition_address_region_info " "failed: %s\n", __func__, __LINE__, ps3_result(result)); goto fail; } if (max_page_size < PAGE_SHIFT_16M) { DBG("%s:%d: bad max_page_size %lxh\n", __func__, __LINE__, max_page_size); goto fail; } BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX); BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN); result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE, 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K), &map.vas_id, &map.htab_size); if (result) { DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n", __func__, __LINE__, ps3_result(result)); goto fail; } result = lv1_select_virtual_address_space(map.vas_id); if (result) { DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n", __func__, __LINE__, ps3_result(result)); goto fail; } *htab_size = map.htab_size; debug_dump_map(&map); return; fail: panic("ps3_mm_vas_create failed"); } /** * ps3_mm_vas_destroy - */ void ps3_mm_vas_destroy(void) { if (map.vas_id) { lv1_select_virtual_address_space(0); lv1_destruct_virtual_address_space(map.vas_id); map.vas_id = 0; } } /*============================================================================*/ /* memory hotplug routines */ /*============================================================================*/ /** * ps3_mm_region_create - create a memory region in the vas * @r: pointer to a struct mem_region to accept initialized values * @size: requested region size * * This implementation creates the region with the vas large page size. * @size is rounded down to a multiple of the vas large page size. */ int ps3_mm_region_create(struct mem_region *r, unsigned long size) { int result; unsigned long muid; r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M); DBG("%s:%d requested %lxh\n", __func__, __LINE__, size); DBG("%s:%d actual %lxh\n", __func__, __LINE__, r->size); DBG("%s:%d difference %lxh (%luMB)\n", __func__, __LINE__, (unsigned long)(size - r->size), (size - r->size) / 1024 / 1024); if (r->size == 0) { DBG("%s:%d: size == 0\n", __func__, __LINE__); result = -1; goto zero_region; } result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0, ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid); if (result || r->base < map.rm.size) { DBG("%s:%d: lv1_allocate_memory failed: %s\n", __func__, __LINE__, ps3_result(result)); goto zero_region; } r->offset = r->base - map.rm.size; return result; zero_region: r->size = r->base = r->offset = 0; return result; } /** * ps3_mm_region_destroy - destroy a memory region * @r: pointer to struct mem_region */ void ps3_mm_region_destroy(struct mem_region *r) { if (r->base) { lv1_release_memory(r->base); r->size = r->base = r->offset = 0; map.total = map.rm.size; } } /** * ps3_mm_add_memory - hot add memory */ static int __init ps3_mm_add_memory(void) { int result; unsigned long start_addr; unsigned long start_pfn; unsigned long nr_pages; BUG_ON(!mem_init_done); start_addr = USE_LPAR_ADDR ? map.r1.base : map.rm.size; start_pfn = start_addr >> PAGE_SHIFT; nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT; DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n", __func__, __LINE__, start_addr, start_pfn, nr_pages); result = add_memory(0, start_addr, map.r1.size); if (result) { DBG("%s:%d: add_memory failed: (%d)\n", __func__, __LINE__, result); return result; } result = online_pages(start_pfn, nr_pages); if (result) DBG("%s:%d: online_pages failed: (%d)\n", __func__, __LINE__, result); return result; } core_initcall(ps3_mm_add_memory); /*============================================================================*/ /* dma routines */ /*============================================================================*/ /** * dma_lpar_to_bus - Translate an lpar address to ioc mapped bus address. * @r: pointer to dma region structure * @lpar_addr: HV lpar address */ static unsigned long dma_lpar_to_bus(struct ps3_dma_region *r, unsigned long lpar_addr) { BUG_ON(lpar_addr >= map.r1.base + map.r1.size); return r->bus_addr + (lpar_addr <= map.rm.size ? lpar_addr : lpar_addr - map.r1.offset); } #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) static void _dma_dump_region(const struct ps3_dma_region *r, const char* func, int line) { DBG("%s:%d: dev %u:%u\n", func, line, r->did.bus_id, r->did.dev_id); DBG("%s:%d: page_size %u\n", func, line, r->page_size); DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr); DBG("%s:%d: len %lxh\n", func, line, r->len); } /** * dma_chunk - A chunk of dma pages mapped by the io controller. * @region - The dma region that owns this chunk. * @lpar_addr: Starting lpar address of the area to map. * @bus_addr: Starting ioc bus address of the area to map. * @len: Length in bytes of the area to map. * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the * list of all chuncks owned by the region. * * This implementation uses a very simple dma page manager * based on the dma_chunk structure. This scheme assumes * that all drivers use very well behaved dma ops. */ struct dma_chunk { struct ps3_dma_region *region; unsigned long lpar_addr; unsigned long bus_addr; unsigned long len; struct list_head link; unsigned int usage_count; }; #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__) static void _dma_dump_chunk (const struct dma_chunk* c, const char* func, int line) { DBG("%s:%d: r.dev %u:%u\n", func, line, c->region->did.bus_id, c->region->did.dev_id); DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr); DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size); DBG("%s:%d: r.len %lxh\n", func, line, c->region->len); DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr); DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr); DBG("%s:%d: c.len %lxh\n", func, line, c->len); } static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r, unsigned long bus_addr, unsigned long len) { struct dma_chunk *c; unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); unsigned long aligned_len = _ALIGN_UP(len, 1 << r->page_size); list_for_each_entry(c, &r->chunk_list.head, link) { /* intersection */ if (aligned_bus >= c->bus_addr && aligned_bus < c->bus_addr + c->len && aligned_bus + aligned_len <= c->bus_addr + c->len) { return c; } /* below */ if (aligned_bus + aligned_len <= c->bus_addr) { continue; } /* above */ if (aligned_bus >= c->bus_addr + c->len) { continue; } /* we don't handle the multi-chunk case for now */ dma_dump_chunk(c); BUG(); } return NULL; } static int dma_free_chunk(struct dma_chunk *c) { int result = 0; if (c->bus_addr) { result = lv1_unmap_device_dma_region(c->region->did.bus_id, c->region->did.dev_id, c->bus_addr, c->len); BUG_ON(result); } kfree(c); return result; } /** * dma_map_pages - Maps dma pages into the io controller bus address space. * @r: Pointer to a struct ps3_dma_region. * @phys_addr: Starting physical address of the area to map. * @len: Length in bytes of the area to map. * c_out: A pointer to receive an allocated struct dma_chunk for this area. * * This is the lowest level dma mapping routine, and is the one that will * make the HV call to add the pages into the io controller address space. */ static int dma_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, unsigned long len, struct dma_chunk **c_out) { int result; struct dma_chunk *c; c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); if (!c) { result = -ENOMEM; goto fail_alloc; } c->region = r; c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); c->bus_addr = dma_lpar_to_bus(r, c->lpar_addr); c->len = len; result = lv1_map_device_dma_region(c->region->did.bus_id, c->region->did.dev_id, c->lpar_addr, c->bus_addr, c->len, 0xf800000000000000UL); if (result) { DBG("%s:%d: lv1_map_device_dma_region failed: %s\n", __func__, __LINE__, ps3_result(result)); goto fail_map; } list_add(&c->link, &r->chunk_list.head); *c_out = c; return 0; fail_map: kfree(c); fail_alloc: *c_out = NULL; DBG(" <- %s:%d\n", __func__, __LINE__); return result; } /** * dma_region_create - Create a device dma region. * @r: Pointer to a struct ps3_dma_region. * * This is the lowest level dma region create routine, and is the one that * will make the HV call to create the region. */ static int dma_region_create(struct ps3_dma_region* r) { int result; r->len = _ALIGN_UP(map.total, 1 << r->page_size); INIT_LIST_HEAD(&r->chunk_list.head); spin_lock_init(&r->chunk_list.lock); result = lv1_allocate_device_dma_region(r->did.bus_id, r->did.dev_id, r->len, r->page_size, r->region_type, &r->bus_addr); dma_dump_region(r); if (result) { DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n", __func__, __LINE__, ps3_result(result)); r->len = r->bus_addr = 0; } return result; } /** * dma_region_free - Free a device dma region. * @r: Pointer to a struct ps3_dma_region. * * This is the lowest level dma region free routine, and is the one that * will make the HV call to free the region. */ static int dma_region_free(struct ps3_dma_region* r) { int result; struct dma_chunk *c; struct dma_chunk *tmp; list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { list_del(&c->link); dma_free_chunk(c); } result = lv1_free_device_dma_region(r->did.bus_id, r->did.dev_id, r->bus_addr); if (result) DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", __func__, __LINE__, ps3_result(result)); r->len = r->bus_addr = 0; return result; } /** * dma_map_area - Map an area of memory into a device dma region. * @r: Pointer to a struct ps3_dma_region. * @virt_addr: Starting virtual address of the area to map. * @len: Length in bytes of the area to map. * @bus_addr: A pointer to return the starting ioc bus address of the area to * map. * * This is the common dma mapping routine. */ static int dma_map_area(struct ps3_dma_region *r, unsigned long virt_addr, unsigned long len, unsigned long *bus_addr) { int result; unsigned long flags; struct dma_chunk *c; unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) : virt_addr; *bus_addr = dma_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); if (!USE_DYNAMIC_DMA) { unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr); DBG(" -> %s:%d\n", __func__, __LINE__); DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__, virt_addr); DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__, phys_addr); DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__, lpar_addr); DBG("%s:%d len %lxh\n", __func__, __LINE__, len); DBG("%s:%d bus_addr %lxh (%lxh)\n", __func__, __LINE__, *bus_addr, len); } spin_lock_irqsave(&r->chunk_list.lock, flags); c = dma_find_chunk(r, *bus_addr, len); if (c) { c->usage_count++; spin_unlock_irqrestore(&r->chunk_list.lock, flags); return 0; } result = dma_map_pages(r, _ALIGN_DOWN(phys_addr, 1 << r->page_size), _ALIGN_UP(len, 1 << r->page_size), &c); if (result) { *bus_addr = 0; DBG("%s:%d: dma_map_pages failed (%d)\n", __func__, __LINE__, result); spin_unlock_irqrestore(&r->chunk_list.lock, flags); return result; } c->usage_count = 1; spin_unlock_irqrestore(&r->chunk_list.lock, flags); return result; } /** * dma_unmap_area - Unmap an area of memory from a device dma region. * @r: Pointer to a struct ps3_dma_region. * @bus_addr: The starting ioc bus address of the area to unmap. * @len: Length in bytes of the area to unmap. * * This is the common dma unmap routine. */ int dma_unmap_area(struct ps3_dma_region *r, unsigned long bus_addr, unsigned long len) { unsigned long flags; struct dma_chunk *c; spin_lock_irqsave(&r->chunk_list.lock, flags); c = dma_find_chunk(r, bus_addr, len); if (!c) { unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); unsigned long aligned_len = _ALIGN_UP(len, 1 << r->page_size); DBG("%s:%d: not found: bus_addr %lxh\n", __func__, __LINE__, bus_addr); DBG("%s:%d: not found: len %lxh\n", __func__, __LINE__, len); DBG("%s:%d: not found: aligned_bus %lxh\n", __func__, __LINE__, aligned_bus); DBG("%s:%d: not found: aligned_len %lxh\n", __func__, __LINE__, aligned_len); BUG(); } c->usage_count--; if (!c->usage_count) { list_del(&c->link); dma_free_chunk(c); } spin_unlock_irqrestore(&r->chunk_list.lock, flags); return 0; } /** * dma_region_create_linear - Setup a linear dma maping for a device. * @r: Pointer to a struct ps3_dma_region. * * This routine creates an HV dma region for the device and maps all available * ram into the io controller bus address space. */ static int dma_region_create_linear(struct ps3_dma_region *r) { int result; unsigned long tmp; /* force 16M dma pages for linear mapping */ if (r->page_size != PS3_DMA_16M) { pr_info("%s:%d: forcing 16M pages for linear map\n", __func__, __LINE__); r->page_size = PS3_DMA_16M; } result = dma_region_create(r); BUG_ON(result); result = dma_map_area(r, map.rm.base, map.rm.size, &tmp); BUG_ON(result); if (USE_LPAR_ADDR) result = dma_map_area(r, map.r1.base, map.r1.size, &tmp); else result = dma_map_area(r, map.rm.size, map.r1.size, &tmp); BUG_ON(result); return result; } /** * dma_region_free_linear - Free a linear dma mapping for a device. * @r: Pointer to a struct ps3_dma_region. * * This routine will unmap all mapped areas and free the HV dma region. */ static int dma_region_free_linear(struct ps3_dma_region *r) { int result; result = dma_unmap_area(r, dma_lpar_to_bus(r, 0), map.rm.size); BUG_ON(result); result = dma_unmap_area(r, dma_lpar_to_bus(r, map.r1.base), map.r1.size); BUG_ON(result); result = dma_region_free(r); BUG_ON(result); return result; } /** * dma_map_area_linear - Map an area of memory into a device dma region. * @r: Pointer to a struct ps3_dma_region. * @virt_addr: Starting virtual address of the area to map. * @len: Length in bytes of the area to map. * @bus_addr: A pointer to return the starting ioc bus address of the area to * map. * * This routine just returns the coresponding bus address. Actual mapping * occurs in dma_region_create_linear(). */ static int dma_map_area_linear(struct ps3_dma_region *r, unsigned long virt_addr, unsigned long len, unsigned long *bus_addr) { unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) : virt_addr; *bus_addr = dma_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); return 0; } /** * dma_unmap_area_linear - Unmap an area of memory from a device dma region. * @r: Pointer to a struct ps3_dma_region. * @bus_addr: The starting ioc bus address of the area to unmap. * @len: Length in bytes of the area to unmap. * * This routine does nothing. Unmapping occurs in dma_region_free_linear(). */ static int dma_unmap_area_linear(struct ps3_dma_region *r, unsigned long bus_addr, unsigned long len) { return 0; } int ps3_dma_region_create(struct ps3_dma_region *r) { return (USE_DYNAMIC_DMA) ? dma_region_create(r) : dma_region_create_linear(r); } int ps3_dma_region_free(struct ps3_dma_region *r) { return (USE_DYNAMIC_DMA) ? dma_region_free(r) : dma_region_free_linear(r); } int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, unsigned long len, unsigned long *bus_addr) { return (USE_DYNAMIC_DMA) ? dma_map_area(r, virt_addr, len, bus_addr) : dma_map_area_linear(r, virt_addr, len, bus_addr); } int ps3_dma_unmap(struct ps3_dma_region *r, unsigned long bus_addr, unsigned long len) { return (USE_DYNAMIC_DMA) ? dma_unmap_area(r, bus_addr, len) : dma_unmap_area_linear(r, bus_addr, len); } /*============================================================================*/ /* system startup routines */ /*============================================================================*/ /** * ps3_mm_init - initialize the address space state variables */ void __init ps3_mm_init(void) { int result; DBG(" -> %s:%d\n", __func__, __LINE__); result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size, &map.total); if (result) panic("ps3_repository_read_mm_info() failed"); map.rm.offset = map.rm.base; map.vas_id = map.htab_size = 0; /* this implementation assumes map.rm.base is zero */ BUG_ON(map.rm.base); BUG_ON(!map.rm.size); lmb_add(map.rm.base, map.rm.size); lmb_analyze(); /* arrange to do this in ps3_mm_add_memory */ ps3_mm_region_create(&map.r1, map.total - map.rm.size); DBG(" <- %s:%d\n", __func__, __LINE__); } /** * ps3_mm_shutdown - final cleanup of address space */ void ps3_mm_shutdown(void) { ps3_mm_region_destroy(&map.r1); map.total = map.rm.size; }