mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1239 lines
31 KiB
1239 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* PS3 address space management. |
|
* |
|
* Copyright (C) 2006 Sony Computer Entertainment Inc. |
|
* Copyright 2006 Sony Corp. |
|
*/ |
|
|
|
#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/prom.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 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 - |
|
*/ |
|
|
|
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 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 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 %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; |
|
|
|
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); |
|
|
|
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 |
|
*/ |
|
|
|
void ps3_mm_shutdown(void) |
|
{ |
|
ps3_mm_region_destroy(&map.r1); |
|
}
|
|
|