diff options
Diffstat (limited to 'arch/powerpc/platforms/ps3/mm.c')
| -rw-r--r-- | arch/powerpc/platforms/ps3/mm.c | 1254 |
1 files changed, 1254 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/ps3/mm.c b/arch/powerpc/platforms/ps3/mm.c new file mode 100644 index 000000000..1326de55f --- /dev/null +++ b/arch/powerpc/platforms/ps3/mm.c @@ -0,0 +1,1254 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PS3 address space management. + * + * Copyright (C) 2006 Sony Computer Entertainment Inc. + * Copyright 2006 Sony Corp. + */ + +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/memblock.h> +#include <linux/slab.h> + +#include <asm/cell-regs.h> +#include <asm/firmware.h> +#include <asm/udbg.h> +#include <asm/lv1call.h> +#include <asm/setup.h> + +#include "platform.h" + +#if defined(DEBUG) +#define DBG udbg_printf +#else +#define DBG pr_devel +#endif + +enum { +#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 __init 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 + * @destroy: flag if region should be destroyed upon shutdown + */ + +struct mem_region { + u64 base; + u64 size; + unsigned long offset; + int destroy; +}; + +/** + * 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: highmem 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 { + u64 total; + u64 vas_id; + u64 htab_size; + struct mem_region rm; + struct mem_region r1; +}; + +#define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) +static void __maybe_unused _debug_dump_map(const struct map *m, + const char *func, int line) +{ + DBG("%s:%d: map.total = %llxh\n", func, line, m->total); + DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size); + DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id); + DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size); + DBG("%s:%d: map.r1.base = %llxh\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 = %llxh\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)); + 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; + u64 start_address; + u64 size; + u64 access_right; + u64 max_page_size; + u64 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 %llxh\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 - + * + * called during kexec sequence with MMU off. + */ + +notrace void ps3_mm_vas_destroy(void) +{ + int result; + + if (map.vas_id) { + result = lv1_select_virtual_address_space(0); + result += lv1_destruct_virtual_address_space(map.vas_id); + + if (result) { + lv1_panic(0); + } + + map.vas_id = 0; + } +} + +static int __init ps3_mm_get_repository_highmem(struct mem_region *r) +{ + int result; + + /* Assume a single highmem region. */ + + result = ps3_repository_read_highmem_info(0, &r->base, &r->size); + + if (result) + goto zero_region; + + if (!r->base || !r->size) { + result = -1; + goto zero_region; + } + + r->offset = r->base - map.rm.size; + + DBG("%s:%d: Found high region in repository: %llxh %llxh\n", + __func__, __LINE__, r->base, r->size); + + return 0; + +zero_region: + DBG("%s:%d: No high region in repository.\n", __func__, __LINE__); + + r->size = r->base = r->offset = 0; + return result; +} + +static int ps3_mm_set_repository_highmem(const struct mem_region *r) +{ + /* Assume a single highmem region. */ + + return r ? ps3_repository_write_highmem_info(0, r->base, r->size) : + ps3_repository_write_highmem_info(0, 0, 0); +} + +/** + * 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. + */ + +static int ps3_mm_region_create(struct mem_region *r, unsigned long size) +{ + int result; + u64 muid; + + r->size = ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M); + + DBG("%s:%d requested %lxh\n", __func__, __LINE__, size); + DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size); + DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__, + 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->destroy = 1; + 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 + */ + +static void ps3_mm_region_destroy(struct mem_region *r) +{ + int result; + + if (!r->destroy) { + return; + } + + if (r->base) { + result = lv1_release_memory(r->base); + + if (result) { + lv1_panic(0); + } + + r->size = r->base = r->offset = 0; + map.total = map.rm.size; + } + + ps3_mm_set_repository_highmem(NULL); +} + +/*============================================================================*/ +/* dma routines */ +/*============================================================================*/ + +/** + * dma_sb_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_sb_lpar_to_bus(struct ps3_dma_region *r, + unsigned long lpar_addr) +{ + if (lpar_addr >= map.rm.size) + lpar_addr -= map.r1.offset; + BUG_ON(lpar_addr < r->offset); + BUG_ON(lpar_addr >= r->offset + r->len); + return r->bus_addr + lpar_addr - r->offset; +} + +#define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) +static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r, + const char *func, int line) +{ + DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id, + r->dev->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); + DBG("%s:%d: offset %lxh\n", func, line, r->offset); +} + + /** + * 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 chunks 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 %llu:%llu\n", func, line, + c->region->dev->bus_id, c->region->dev->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: r.offset %lxh\n", func, line, c->region->offset); + 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(len+bus_addr-aligned_bus, + 1 << r->page_size); + + list_for_each_entry(c, &r->chunk_list.head, link) { + /* intersection */ + if (aligned_bus >= c->bus_addr && + 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 struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r, + unsigned long lpar_addr, unsigned long len) +{ + struct dma_chunk *c; + unsigned long aligned_lpar = ALIGN_DOWN(lpar_addr, 1 << r->page_size); + unsigned long aligned_len = ALIGN(len + lpar_addr - aligned_lpar, + 1 << r->page_size); + + list_for_each_entry(c, &r->chunk_list.head, link) { + /* intersection */ + if (c->lpar_addr <= aligned_lpar && + aligned_lpar < c->lpar_addr + c->len) { + if (aligned_lpar + aligned_len <= c->lpar_addr + c->len) + return c; + else { + dma_dump_chunk(c); + BUG(); + } + } + /* below */ + if (aligned_lpar + aligned_len <= c->lpar_addr) { + continue; + } + /* above */ + if (c->lpar_addr + c->len <= aligned_lpar) { + continue; + } + } + return NULL; +} + +static int dma_sb_free_chunk(struct dma_chunk *c) +{ + int result = 0; + + if (c->bus_addr) { + result = lv1_unmap_device_dma_region(c->region->dev->bus_id, + c->region->dev->dev_id, c->bus_addr, c->len); + BUG_ON(result); + } + + kfree(c); + return result; +} + +static int dma_ioc0_free_chunk(struct dma_chunk *c) +{ + int result = 0; + int iopage; + unsigned long offset; + struct ps3_dma_region *r = c->region; + + DBG("%s:start\n", __func__); + for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) { + offset = (1 << r->page_size) * iopage; + /* put INVALID entry */ + result = lv1_put_iopte(0, + c->bus_addr + offset, + c->lpar_addr + offset, + r->ioid, + 0); + DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__, + c->bus_addr + offset, + c->lpar_addr + offset, + r->ioid); + + if (result) { + DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__, + __LINE__, ps3_result(result)); + } + } + kfree(c); + DBG("%s:end\n", __func__); + return result; +} + +/** + * dma_sb_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_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, + unsigned long len, struct dma_chunk **c_out, u64 iopte_flag) +{ + int result; + struct dma_chunk *c; + + c = kzalloc(sizeof(*c), 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_sb_lpar_to_bus(r, c->lpar_addr); + c->len = len; + + BUG_ON(iopte_flag != 0xf800000000000000UL); + result = lv1_map_device_dma_region(c->region->dev->bus_id, + c->region->dev->dev_id, c->lpar_addr, + c->bus_addr, c->len, iopte_flag); + 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; +} + +static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, + unsigned long len, struct dma_chunk **c_out, + u64 iopte_flag) +{ + int result; + struct dma_chunk *c, *last; + int iopage, pages; + unsigned long offset; + + DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__, + phys_addr, ps3_mm_phys_to_lpar(phys_addr), len); + c = kzalloc(sizeof(*c), GFP_ATOMIC); + if (!c) { + result = -ENOMEM; + goto fail_alloc; + } + + c->region = r; + c->len = len; + c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); + /* allocate IO address */ + if (list_empty(&r->chunk_list.head)) { + /* first one */ + c->bus_addr = r->bus_addr; + } else { + /* derive from last bus addr*/ + last = list_entry(r->chunk_list.head.next, + struct dma_chunk, link); + c->bus_addr = last->bus_addr + last->len; + DBG("%s: last bus=%#lx, len=%#lx\n", __func__, + last->bus_addr, last->len); + } + + /* FIXME: check whether length exceeds region size */ + + /* build ioptes for the area */ + pages = len >> r->page_size; + DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__, + r->page_size, r->len, pages, iopte_flag); + for (iopage = 0; iopage < pages; iopage++) { + offset = (1 << r->page_size) * iopage; + result = lv1_put_iopte(0, + c->bus_addr + offset, + c->lpar_addr + offset, + r->ioid, + iopte_flag); + if (result) { + pr_warn("%s:%d: lv1_put_iopte failed: %s\n", + __func__, __LINE__, ps3_result(result)); + goto fail_map; + } + DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__, + iopage, c->bus_addr + offset, c->lpar_addr + offset, + r->ioid); + } + + /* be sure that last allocated one is inserted at head */ + list_add(&c->link, &r->chunk_list.head); + + *c_out = c; + DBG("%s: end\n", __func__); + return 0; + +fail_map: + for (iopage--; 0 <= iopage; iopage--) { + lv1_put_iopte(0, + c->bus_addr + offset, + c->lpar_addr + offset, + r->ioid, + 0); + } + kfree(c); +fail_alloc: + *c_out = NULL; + return result; +} + +/** + * dma_sb_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_sb_region_create(struct ps3_dma_region *r) +{ + int result; + u64 bus_addr; + + DBG(" -> %s:%d:\n", __func__, __LINE__); + + BUG_ON(!r); + + if (!r->dev->bus_id) { + pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, + r->dev->bus_id, r->dev->dev_id); + return 0; + } + + DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__, + __LINE__, r->len, r->page_size, r->offset); + + BUG_ON(!r->len); + BUG_ON(!r->page_size); + BUG_ON(!r->region_ops); + + INIT_LIST_HEAD(&r->chunk_list.head); + spin_lock_init(&r->chunk_list.lock); + + result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id, + roundup_pow_of_two(r->len), r->page_size, r->region_type, + &bus_addr); + r->bus_addr = bus_addr; + + 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; +} + +static int dma_ioc0_region_create(struct ps3_dma_region *r) +{ + int result; + u64 bus_addr; + + INIT_LIST_HEAD(&r->chunk_list.head); + spin_lock_init(&r->chunk_list.lock); + + result = lv1_allocate_io_segment(0, + r->len, + r->page_size, + &bus_addr); + r->bus_addr = bus_addr; + if (result) { + DBG("%s:%d: lv1_allocate_io_segment failed: %s\n", + __func__, __LINE__, ps3_result(result)); + r->len = r->bus_addr = 0; + } + DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__, + r->len, r->page_size, r->bus_addr); + 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_sb_region_free(struct ps3_dma_region *r) +{ + int result; + struct dma_chunk *c; + struct dma_chunk *tmp; + + BUG_ON(!r); + + if (!r->dev->bus_id) { + pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, + r->dev->bus_id, r->dev->dev_id); + return 0; + } + + list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { + list_del(&c->link); + dma_sb_free_chunk(c); + } + + result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id, + r->bus_addr); + + if (result) + DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + r->bus_addr = 0; + + return result; +} + +static int dma_ioc0_region_free(struct ps3_dma_region *r) +{ + int result; + struct dma_chunk *c, *n; + + DBG("%s: start\n", __func__); + list_for_each_entry_safe(c, n, &r->chunk_list.head, link) { + list_del(&c->link); + dma_ioc0_free_chunk(c); + } + + result = lv1_release_io_segment(0, r->bus_addr); + + if (result) + DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + r->bus_addr = 0; + DBG("%s: end\n", __func__); + + return result; +} + +/** + * dma_sb_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_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr, + unsigned long len, dma_addr_t *bus_addr, + u64 iopte_flag) +{ + int result; + unsigned long flags; + struct dma_chunk *c; + unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) + : virt_addr; + unsigned long aligned_phys = ALIGN_DOWN(phys_addr, 1 << r->page_size); + unsigned long aligned_len = ALIGN(len + phys_addr - aligned_phys, + 1 << r->page_size); + *bus_addr = dma_sb_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 %llxh (%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) { + DBG("%s:%d: reusing mapped chunk", __func__, __LINE__); + dma_dump_chunk(c); + c->usage_count++; + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + return 0; + } + + result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag); + + if (result) { + *bus_addr = 0; + DBG("%s:%d: dma_sb_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; +} + +static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr, + unsigned long len, dma_addr_t *bus_addr, + u64 iopte_flag) +{ + int result; + unsigned long flags; + struct dma_chunk *c; + unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) + : virt_addr; + unsigned long aligned_phys = ALIGN_DOWN(phys_addr, 1 << r->page_size); + unsigned long aligned_len = ALIGN(len + phys_addr - aligned_phys, + 1 << r->page_size); + + DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__, + virt_addr, len); + DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__, + phys_addr, aligned_phys, aligned_len); + + spin_lock_irqsave(&r->chunk_list.lock, flags); + c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len); + + if (c) { + /* FIXME */ + BUG(); + *bus_addr = c->bus_addr + phys_addr - aligned_phys; + c->usage_count++; + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + return 0; + } + + result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c, + iopte_flag); + + if (result) { + *bus_addr = 0; + DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n", + __func__, __LINE__, result); + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + return result; + } + *bus_addr = c->bus_addr + phys_addr - aligned_phys; + DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__, + virt_addr, phys_addr, aligned_phys, *bus_addr); + c->usage_count = 1; + + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + return result; +} + +/** + * dma_sb_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. + */ + +static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t 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(len + bus_addr + - aligned_bus, 1 << r->page_size); + DBG("%s:%d: not found: bus_addr %llxh\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_sb_free_chunk(c); + } + + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + return 0; +} + +static int dma_ioc0_unmap_area(struct ps3_dma_region *r, + dma_addr_t bus_addr, unsigned long len) +{ + unsigned long flags; + struct dma_chunk *c; + + DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len); + 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(len + bus_addr + - aligned_bus, + 1 << r->page_size); + DBG("%s:%d: not found: bus_addr %llxh\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_ioc0_free_chunk(c); + } + + spin_unlock_irqrestore(&r->chunk_list.lock, flags); + DBG("%s: end\n", __func__); + return 0; +} + +/** + * dma_sb_region_create_linear - Setup a linear dma mapping 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_sb_region_create_linear(struct ps3_dma_region *r) +{ + int result; + unsigned long virt_addr, len; + dma_addr_t tmp; + + if (r->len > 16*1024*1024) { /* FIXME: need proper fix */ + /* 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; + r->len = ALIGN(r->len, 1 << r->page_size); + } + } + + result = dma_sb_region_create(r); + BUG_ON(result); + + if (r->offset < map.rm.size) { + /* Map (part of) 1st RAM chunk */ + virt_addr = map.rm.base + r->offset; + len = map.rm.size - r->offset; + if (len > r->len) + len = r->len; + result = dma_sb_map_area(r, virt_addr, len, &tmp, + CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | + CBE_IOPTE_M); + BUG_ON(result); + } + + if (r->offset + r->len > map.rm.size) { + /* Map (part of) 2nd RAM chunk */ + virt_addr = map.rm.size; + len = r->len; + if (r->offset >= map.rm.size) + virt_addr += r->offset - map.rm.size; + else + len -= map.rm.size - r->offset; + result = dma_sb_map_area(r, virt_addr, len, &tmp, + CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | + CBE_IOPTE_M); + BUG_ON(result); + } + + return result; +} + +/** + * dma_sb_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_sb_region_free_linear(struct ps3_dma_region *r) +{ + int result; + dma_addr_t bus_addr; + unsigned long len, lpar_addr; + + if (r->offset < map.rm.size) { + /* Unmap (part of) 1st RAM chunk */ + lpar_addr = map.rm.base + r->offset; + len = map.rm.size - r->offset; + if (len > r->len) + len = r->len; + bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); + result = dma_sb_unmap_area(r, bus_addr, len); + BUG_ON(result); + } + + if (r->offset + r->len > map.rm.size) { + /* Unmap (part of) 2nd RAM chunk */ + lpar_addr = map.r1.base; + len = r->len; + if (r->offset >= map.rm.size) + lpar_addr += r->offset - map.rm.size; + else + len -= map.rm.size - r->offset; + bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); + result = dma_sb_unmap_area(r, bus_addr, len); + BUG_ON(result); + } + + result = dma_sb_region_free(r); + BUG_ON(result); + + return result; +} + +/** + * dma_sb_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 corresponding bus address. Actual mapping + * occurs in dma_region_create_linear(). + */ + +static int dma_sb_map_area_linear(struct ps3_dma_region *r, + unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr, + u64 iopte_flag) +{ + unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) + : virt_addr; + *bus_addr = dma_sb_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_sb_region_free_linear(). + */ + +static int dma_sb_unmap_area_linear(struct ps3_dma_region *r, + dma_addr_t bus_addr, unsigned long len) +{ + return 0; +}; + +static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = { + .create = dma_sb_region_create, + .free = dma_sb_region_free, + .map = dma_sb_map_area, + .unmap = dma_sb_unmap_area +}; + +static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = { + .create = dma_sb_region_create_linear, + .free = dma_sb_region_free_linear, + .map = dma_sb_map_area_linear, + .unmap = dma_sb_unmap_area_linear +}; + +static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = { + .create = dma_ioc0_region_create, + .free = dma_ioc0_region_free, + .map = dma_ioc0_map_area, + .unmap = dma_ioc0_unmap_area +}; + +int ps3_dma_region_init(struct ps3_system_bus_device *dev, + struct ps3_dma_region *r, enum ps3_dma_page_size page_size, + enum ps3_dma_region_type region_type, void *addr, unsigned long len) +{ + unsigned long lpar_addr; + int result; + + lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; + + r->dev = dev; + r->page_size = page_size; + r->region_type = region_type; + r->offset = lpar_addr; + if (r->offset >= map.rm.size) + r->offset -= map.r1.offset; + r->len = len ? len : ALIGN(map.total, 1 << r->page_size); + + dev->core.dma_mask = &r->dma_mask; + + result = dma_set_mask_and_coherent(&dev->core, DMA_BIT_MASK(32)); + + if (result < 0) { + dev_err(&dev->core, "%s:%d: dma_set_mask_and_coherent failed: %d\n", + __func__, __LINE__, result); + return result; + } + + switch (dev->dev_type) { + case PS3_DEVICE_TYPE_SB: + r->region_ops = (USE_DYNAMIC_DMA) + ? &ps3_dma_sb_region_ops + : &ps3_dma_sb_region_linear_ops; + break; + case PS3_DEVICE_TYPE_IOC0: + r->region_ops = &ps3_dma_ioc0_region_ops; + break; + default: + BUG(); + return -EINVAL; + } + return 0; +} +EXPORT_SYMBOL(ps3_dma_region_init); + +int ps3_dma_region_create(struct ps3_dma_region *r) +{ + BUG_ON(!r); + BUG_ON(!r->region_ops); + BUG_ON(!r->region_ops->create); + return r->region_ops->create(r); +} +EXPORT_SYMBOL(ps3_dma_region_create); + +int ps3_dma_region_free(struct ps3_dma_region *r) +{ + BUG_ON(!r); + BUG_ON(!r->region_ops); + BUG_ON(!r->region_ops->free); + return r->region_ops->free(r); +} +EXPORT_SYMBOL(ps3_dma_region_free); + +int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, + unsigned long len, dma_addr_t *bus_addr, + u64 iopte_flag) +{ + return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag); +} + +int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr, + unsigned long len) +{ + return r->region_ops->unmap(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); + + /* Check if we got the highmem region from an earlier boot step */ + + if (ps3_mm_get_repository_highmem(&map.r1)) { + result = ps3_mm_region_create(&map.r1, map.total - map.rm.size); + + if (!result) + ps3_mm_set_repository_highmem(&map.r1); + } + + /* correct map.total for the real total amount of memory we use */ + map.total = map.rm.size + map.r1.size; + + if (!map.r1.size) { + DBG("%s:%d: No highmem region found\n", __func__, __LINE__); + } else { + DBG("%s:%d: Adding highmem region: %llxh %llxh\n", + __func__, __LINE__, map.rm.size, + map.total - map.rm.size); + memblock_add(map.rm.size, map.total - map.rm.size); + } + + DBG(" <- %s:%d\n", __func__, __LINE__); +} + +/** + * ps3_mm_shutdown - final cleanup of address space + * + * called during kexec sequence with MMU off. + */ + +notrace void ps3_mm_shutdown(void) +{ + ps3_mm_region_destroy(&map.r1); +} |