forked from Minki/linux
[POWERPC] PS3: Add os-area database routines
Add support for a simple tagged database in the PS3 flash rom os-area. The database allows the flash rom os-area to be shared between a bootloader and installed operating systems. The application ps3-flash-util or the library libps3-utils from the ps3-utils package can be used for userspace database operations. The latest ps3-utils package is available here: git://git.kernel.org/pub/scm/linux/kernel/git/geoff/ps3-utils.git Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Geoff Levand
Paul Mackerras
parent
7db19421a9
commit
ef2ac63aef
@ -21,6 +21,8 @@
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/workqueue.h>
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#include <linux/fs.h>
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#include <linux/syscalls.h>
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#include <asm/lmb.h>
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@ -39,7 +41,7 @@ enum os_area_ldr_format {
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* struct os_area_header - os area header segment.
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* @magic_num: Always 'cell_ext_os_area'.
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* @hdr_version: Header format version number.
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* @os_area_offset: Starting segment number of os image area.
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* @db_area_offset: Starting segment number of other os database area.
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* @ldr_area_offset: Starting segment number of bootloader image area.
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* @ldr_format: HEADER_LDR_FORMAT flag.
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* @ldr_size: Size of bootloader image in bytes.
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@ -53,7 +55,7 @@ enum os_area_ldr_format {
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struct os_area_header {
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u8 magic_num[16];
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u32 hdr_version;
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u32 os_area_offset;
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u32 db_area_offset;
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u32 ldr_area_offset;
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u32 _reserved_1;
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u32 ldr_format;
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@ -112,10 +114,95 @@ struct os_area_params {
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u8 _reserved_5[8];
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};
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enum {
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OS_AREA_DB_MAGIC_NUM = 0x2d64622dU,
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};
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/**
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* struct os_area_db - Shared flash memory database.
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* @magic_num: Always '-db-' = 0x2d64622d.
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* @version: os_area_db format version number.
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* @index_64: byte offset of the database id index for 64 bit variables.
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* @count_64: number of usable 64 bit index entries
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* @index_32: byte offset of the database id index for 32 bit variables.
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* @count_32: number of usable 32 bit index entries
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* @index_16: byte offset of the database id index for 16 bit variables.
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* @count_16: number of usable 16 bit index entries
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*
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* Flash rom storage for exclusive use by guests running in the other os lpar.
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* The current system configuration allocates 1K (two segments) for other os
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* use.
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*/
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struct os_area_db {
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u32 magic_num;
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u16 version;
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u16 _reserved_1;
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u16 index_64;
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u16 count_64;
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u16 index_32;
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u16 count_32;
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u16 index_16;
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u16 count_16;
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u32 _reserved_2;
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u8 _db_data[1000];
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};
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/**
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* enum os_area_db_owner - Data owners.
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*/
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enum os_area_db_owner {
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OS_AREA_DB_OWNER_ANY = -1,
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OS_AREA_DB_OWNER_NONE = 0,
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OS_AREA_DB_OWNER_PROTOTYPE = 1,
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OS_AREA_DB_OWNER_LINUX = 2,
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OS_AREA_DB_OWNER_PETITBOOT = 3,
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OS_AREA_DB_OWNER_MAX = 32,
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};
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enum os_area_db_key {
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OS_AREA_DB_KEY_ANY = -1,
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OS_AREA_DB_KEY_NONE = 0,
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OS_AREA_DB_KEY_RTC_DIFF = 1,
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OS_AREA_DB_KEY_VIDEO_MODE = 2,
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OS_AREA_DB_KEY_MAX = 8,
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};
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struct os_area_db_id {
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int owner;
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int key;
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};
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static const struct os_area_db_id os_area_db_id_empty = {
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.owner = OS_AREA_DB_OWNER_NONE,
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.key = OS_AREA_DB_KEY_NONE
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};
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static const struct os_area_db_id os_area_db_id_any = {
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.owner = OS_AREA_DB_OWNER_ANY,
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.key = OS_AREA_DB_KEY_ANY
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};
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static const struct os_area_db_id os_area_db_id_rtc_diff = {
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.owner = OS_AREA_DB_OWNER_LINUX,
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.key = OS_AREA_DB_KEY_RTC_DIFF
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};
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static const struct os_area_db_id os_area_db_id_video_mode = {
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.owner = OS_AREA_DB_OWNER_LINUX,
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.key = OS_AREA_DB_KEY_VIDEO_MODE
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};
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#define SECONDS_FROM_1970_TO_2000 946684800LL
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/**
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* struct saved_params - Static working copies of data from the PS3 'os area'.
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*
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* The order of preference we use for the rtc_diff source:
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* 1) The database value.
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* 2) The game os value.
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* 3) The number of seconds from 1970 to 2000.
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*/
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struct saved_params {
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@ -182,17 +269,17 @@ static void __init os_area_get_property(struct device_node *node,
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static void _dump_header(const struct os_area_header *h, const char *func,
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int line)
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{
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pr_debug("%s:%d: h.magic_num: '%s'\n", func, line,
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pr_debug("%s:%d: h.magic_num: '%s'\n", func, line,
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h->magic_num);
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pr_debug("%s:%d: h.hdr_version: %u\n", func, line,
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pr_debug("%s:%d: h.hdr_version: %u\n", func, line,
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h->hdr_version);
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pr_debug("%s:%d: h.os_area_offset: %u\n", func, line,
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h->os_area_offset);
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pr_debug("%s:%d: h.db_area_offset: %u\n", func, line,
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h->db_area_offset);
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pr_debug("%s:%d: h.ldr_area_offset: %u\n", func, line,
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h->ldr_area_offset);
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pr_debug("%s:%d: h.ldr_format: %u\n", func, line,
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pr_debug("%s:%d: h.ldr_format: %u\n", func, line,
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h->ldr_format);
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pr_debug("%s:%d: h.ldr_size: %xh\n", func, line,
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pr_debug("%s:%d: h.ldr_size: %xh\n", func, line,
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h->ldr_size);
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}
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@ -222,7 +309,7 @@ static void _dump_params(const struct os_area_params *p, const char *func,
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p->dns_secondary[2], p->dns_secondary[3]);
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}
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static int __init verify_header(const struct os_area_header *header)
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static int verify_header(const struct os_area_header *header)
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{
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if (memcmp(header->magic_num, "cell_ext_os_area", 16)) {
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pr_debug("%s:%d magic_num failed\n", __func__, __LINE__);
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@ -234,7 +321,7 @@ static int __init verify_header(const struct os_area_header *header)
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return -1;
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}
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if (header->os_area_offset > header->ldr_area_offset) {
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if (header->db_area_offset > header->ldr_area_offset) {
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pr_debug("%s:%d offsets failed\n", __func__, __LINE__);
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return -1;
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}
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@ -242,6 +329,319 @@ static int __init verify_header(const struct os_area_header *header)
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return 0;
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}
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static int db_verify(const struct os_area_db *db)
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{
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if (db->magic_num != OS_AREA_DB_MAGIC_NUM) {
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pr_debug("%s:%d magic_num failed\n", __func__, __LINE__);
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return -1;
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}
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if (db->version != 1) {
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pr_debug("%s:%d version failed\n", __func__, __LINE__);
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return -1;
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}
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return 0;
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}
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struct db_index {
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uint8_t owner:5;
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uint8_t key:3;
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};
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struct db_iterator {
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const struct os_area_db *db;
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struct os_area_db_id match_id;
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struct db_index *idx;
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struct db_index *last_idx;
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union {
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uint64_t *value_64;
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uint32_t *value_32;
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uint16_t *value_16;
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};
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};
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static unsigned int db_align_up(unsigned int val, unsigned int size)
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{
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return (val + (size - 1)) & (~(size - 1));
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}
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/**
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* db_for_each_64 - Iterator for 64 bit entries.
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*
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* A NULL value for id can be used to match all entries.
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* OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all.
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*/
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static int db_for_each_64(const struct os_area_db *db,
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const struct os_area_db_id *match_id, struct db_iterator *i)
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{
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next:
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if (!i->db) {
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i->db = db;
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i->match_id = match_id ? *match_id : os_area_db_id_any;
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i->idx = (void *)db + db->index_64;
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i->last_idx = i->idx + db->count_64;
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i->value_64 = (void *)db + db->index_64
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+ db_align_up(db->count_64, 8);
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} else {
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i->idx++;
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i->value_64++;
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}
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if (i->idx >= i->last_idx) {
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pr_debug("%s:%d: reached end\n", __func__, __LINE__);
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return 0;
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}
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if (i->match_id.owner != OS_AREA_DB_OWNER_ANY
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&& i->match_id.owner != (int)i->idx->owner)
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goto next;
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if (i->match_id.key != OS_AREA_DB_KEY_ANY
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&& i->match_id.key != (int)i->idx->key)
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goto next;
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return 1;
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}
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static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id)
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{
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struct db_iterator i;
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for (i.db = NULL; db_for_each_64(db, id, &i); ) {
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pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__,
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i.idx->owner, i.idx->key,
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(unsigned long long)*i.value_64);
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i.idx->owner = 0;
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i.idx->key = 0;
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*i.value_64 = 0;
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}
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return 0;
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}
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static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id,
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uint64_t value)
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{
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struct db_iterator i;
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pr_debug("%s:%d: (%d:%d) <= %llxh\n", __func__, __LINE__,
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id->owner, id->key, (unsigned long long)value);
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if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY
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|| id->key == OS_AREA_DB_KEY_ANY) {
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pr_debug("%s:%d: bad id: (%d:%d)\n", __func__,
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__LINE__, id->owner, id->key);
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return -1;
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}
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db_delete_64(db, id);
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i.db = NULL;
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if (db_for_each_64(db, &os_area_db_id_empty, &i)) {
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pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__,
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i.idx->owner, i.idx->key,
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(unsigned long long)*i.value_64);
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i.idx->owner = id->owner;
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i.idx->key = id->key;
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*i.value_64 = value;
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pr_debug("%s:%d: set (%d:%d) <= %llxh\n", __func__, __LINE__,
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i.idx->owner, i.idx->key,
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(unsigned long long)*i.value_64);
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return 0;
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}
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pr_debug("%s:%d: database full.\n",
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__func__, __LINE__);
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return -1;
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}
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static int db_get_64(const struct os_area_db *db,
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const struct os_area_db_id *id, uint64_t *value)
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{
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struct db_iterator i;
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i.db = NULL;
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if (db_for_each_64(db, id, &i)) {
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*value = *i.value_64;
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pr_debug("%s:%d: found %lld\n", __func__, __LINE__,
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(long long int)*i.value_64);
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return 0;
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}
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pr_debug("%s:%d: not found\n", __func__, __LINE__);
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return -1;
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}
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static int db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff)
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{
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return db_get_64(db, &os_area_db_id_rtc_diff, (uint64_t*)rtc_diff);
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}
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#define dump_db(a) _dump_db(a, __func__, __LINE__)
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static void _dump_db(const struct os_area_db *db, const char *func,
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int line)
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{
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pr_debug("%s:%d: db.magic_num: '%s'\n", func, line,
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(const char*)&db->magic_num);
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pr_debug("%s:%d: db.version: %u\n", func, line,
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db->version);
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pr_debug("%s:%d: db.index_64: %u\n", func, line,
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db->index_64);
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pr_debug("%s:%d: db.count_64: %u\n", func, line,
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db->count_64);
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pr_debug("%s:%d: db.index_32: %u\n", func, line,
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db->index_32);
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pr_debug("%s:%d: db.count_32: %u\n", func, line,
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db->count_32);
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pr_debug("%s:%d: db.index_16: %u\n", func, line,
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db->index_16);
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pr_debug("%s:%d: db.count_16: %u\n", func, line,
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db->count_16);
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}
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static void os_area_db_init(struct os_area_db *db)
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{
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enum {
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HEADER_SIZE = offsetof(struct os_area_db, _db_data),
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INDEX_64_COUNT = 64,
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VALUES_64_COUNT = 57,
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INDEX_32_COUNT = 64,
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VALUES_32_COUNT = 57,
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INDEX_16_COUNT = 64,
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VALUES_16_COUNT = 57,
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};
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memset(db, 0, sizeof(struct os_area_db));
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db->magic_num = OS_AREA_DB_MAGIC_NUM;
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db->version = 1;
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db->index_64 = HEADER_SIZE;
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db->count_64 = VALUES_64_COUNT;
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db->index_32 = HEADER_SIZE
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+ INDEX_64_COUNT * sizeof(struct db_index)
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+ VALUES_64_COUNT * sizeof(u64);
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db->count_32 = VALUES_32_COUNT;
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db->index_16 = HEADER_SIZE
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+ INDEX_64_COUNT * sizeof(struct db_index)
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+ VALUES_64_COUNT * sizeof(u64)
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+ INDEX_32_COUNT * sizeof(struct db_index)
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+ VALUES_32_COUNT * sizeof(u32);
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db->count_16 = VALUES_16_COUNT;
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/* Rules to check db layout. */
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BUILD_BUG_ON(sizeof(struct db_index) != 1);
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BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE);
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BUILD_BUG_ON(INDEX_64_COUNT & 0x7);
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BUILD_BUG_ON(VALUES_64_COUNT > INDEX_64_COUNT);
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BUILD_BUG_ON(INDEX_32_COUNT & 0x7);
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BUILD_BUG_ON(VALUES_32_COUNT > INDEX_32_COUNT);
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BUILD_BUG_ON(INDEX_16_COUNT & 0x7);
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BUILD_BUG_ON(VALUES_16_COUNT > INDEX_16_COUNT);
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BUILD_BUG_ON(HEADER_SIZE
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+ INDEX_64_COUNT * sizeof(struct db_index)
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+ VALUES_64_COUNT * sizeof(u64)
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+ INDEX_32_COUNT * sizeof(struct db_index)
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+ VALUES_32_COUNT * sizeof(u32)
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+ INDEX_16_COUNT * sizeof(struct db_index)
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+ VALUES_16_COUNT * sizeof(u16)
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> sizeof(struct os_area_db));
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}
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/**
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* update_flash_db - Helper for os_area_queue_work_handler.
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*
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*/
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static void update_flash_db(void)
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{
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int result;
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int file;
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off_t offset;
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ssize_t count;
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static const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE;
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const struct os_area_header *header;
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struct os_area_db* db;
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/* Read in header and db from flash. */
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file = sys_open("/dev/ps3flash", O_RDWR, 0);
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if (file < 0) {
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pr_debug("%s:%d sys_open failed\n", __func__, __LINE__);
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goto fail_open;
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}
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header = kmalloc(buf_len, GFP_KERNEL);
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if (!header) {
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pr_debug("%s:%d kmalloc failed\n", __func__, __LINE__);
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goto fail_malloc;
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}
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offset = sys_lseek(file, 0, SEEK_SET);
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if (offset != 0) {
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pr_debug("%s:%d sys_lseek failed\n", __func__, __LINE__);
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goto fail_header_seek;
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}
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count = sys_read(file, (char __user *)header, buf_len);
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result = count < OS_AREA_SEGMENT_SIZE || verify_header(header)
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|| count < header->db_area_offset * OS_AREA_SEGMENT_SIZE;
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if (result) {
|
||||
pr_debug("%s:%d verify_header failed\n", __func__, __LINE__);
|
||||
dump_header(header);
|
||||
goto fail_header;
|
||||
}
|
||||
|
||||
/* Now got a good db offset and some maybe good db data. */
|
||||
|
||||
db = (void*)header + header->db_area_offset * OS_AREA_SEGMENT_SIZE;
|
||||
|
||||
result = db_verify(db);
|
||||
|
||||
if (result) {
|
||||
printk(KERN_NOTICE "%s:%d: Verify of flash database failed, "
|
||||
"formatting.\n", __func__, __LINE__);
|
||||
dump_db(db);
|
||||
os_area_db_init(db);
|
||||
}
|
||||
|
||||
/* Now got good db data. */
|
||||
|
||||
db_set_64(db, &os_area_db_id_rtc_diff, saved_params.rtc_diff);
|
||||
|
||||
offset = sys_lseek(file, header->db_area_offset * OS_AREA_SEGMENT_SIZE,
|
||||
SEEK_SET);
|
||||
|
||||
if (offset != header->db_area_offset * OS_AREA_SEGMENT_SIZE) {
|
||||
pr_debug("%s:%d sys_lseek failed\n", __func__, __LINE__);
|
||||
goto fail_db_seek;
|
||||
}
|
||||
|
||||
count = sys_write(file, (const char __user *)db,
|
||||
sizeof(struct os_area_db));
|
||||
|
||||
if (count < sizeof(struct os_area_db)) {
|
||||
pr_debug("%s:%d sys_write failed\n", __func__, __LINE__);
|
||||
}
|
||||
|
||||
fail_db_seek:
|
||||
fail_header:
|
||||
fail_header_seek:
|
||||
kfree(header);
|
||||
fail_malloc:
|
||||
sys_close(file);
|
||||
fail_open:
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* os_area_queue_work_handler - Asynchronous write handler.
|
||||
*
|
||||
@ -264,6 +664,12 @@ static void os_area_queue_work_handler(struct work_struct *work)
|
||||
pr_debug("%s:%d of_find_node_by_path failed\n",
|
||||
__func__, __LINE__);
|
||||
|
||||
#if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
|
||||
update_flash_db();
|
||||
#else
|
||||
printk(KERN_WARNING "%s:%d: No flash rom driver configured.\n",
|
||||
__func__, __LINE__);
|
||||
#endif
|
||||
pr_debug(" <- %s:%d\n", __func__, __LINE__);
|
||||
}
|
||||
|
||||
@ -278,11 +684,15 @@ static void os_area_queue_work(void)
|
||||
/**
|
||||
* ps3_os_area_save_params - Copy data from os area mirror to @saved_params.
|
||||
*
|
||||
* For the convenience of the guest, the HV makes a copy of the os area in
|
||||
* For the convenience of the guest the HV makes a copy of the os area in
|
||||
* flash to a high address in the boot memory region and then puts that RAM
|
||||
* address and the byte count into the repository for retreval by the guest.
|
||||
* address and the byte count into the repository for retrieval by the guest.
|
||||
* We copy the data we want into a static variable and allow the memory setup
|
||||
* by the HV to be claimed by the lmb manager.
|
||||
*
|
||||
* The os area mirror will not be available to a second stage kernel, and
|
||||
* the header verify will fail. In this case, the saved_params values will
|
||||
* be set from flash memory or the passed in device tree in ps3_os_area_init().
|
||||
*/
|
||||
|
||||
void __init ps3_os_area_save_params(void)
|
||||
@ -292,6 +702,7 @@ void __init ps3_os_area_save_params(void)
|
||||
unsigned int size;
|
||||
struct os_area_header *header;
|
||||
struct os_area_params *params;
|
||||
struct os_area_db *db;
|
||||
|
||||
pr_debug(" -> %s:%d\n", __func__, __LINE__);
|
||||
|
||||
@ -311,16 +722,22 @@ void __init ps3_os_area_save_params(void)
|
||||
|
||||
if (result) {
|
||||
/* Second stage kernels exit here. */
|
||||
|
||||
pr_debug("%s:%d verify_header failed\n", __func__, __LINE__);
|
||||
dump_header(header);
|
||||
return;
|
||||
}
|
||||
|
||||
db = (struct os_area_db *)__va(lpar_addr
|
||||
+ header->db_area_offset * OS_AREA_SEGMENT_SIZE);
|
||||
|
||||
dump_header(header);
|
||||
dump_params(params);
|
||||
dump_db(db);
|
||||
|
||||
saved_params.rtc_diff = params->rtc_diff;
|
||||
result = db_verify(db) || db_get_rtc_diff(db, &saved_params.rtc_diff);
|
||||
if (result)
|
||||
saved_params.rtc_diff = params->rtc_diff ? params->rtc_diff
|
||||
: SECONDS_FROM_1970_TO_2000;
|
||||
saved_params.av_multi_out = params->av_multi_out;
|
||||
saved_params.valid = 1;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user