shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-11 05:17:10 +09:00
Code Issues Packages Projects Releases Wiki Activity

rk29: vpu_mem: add debug_read function and some comments

Browse Source
This commit is contained in:
陈恒明
2011-04-20 10:03:25 +08:00
parent d6f984c589
commit 566ff924d0
1 changed files with 69 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

110
arch/arm/mach-rk29/vpu_mem.c
View File

@@ -28,15 +28,12 @@
#include <mach/vpu_mem.h>
#define VPU_MEM_MAX_ORDER 128
#define VPU_MEM_MIN_ALLOC PAGE_SIZE
#define VPU_MEM_IS_PAGE_ALIGNED(addr) (!((addr) & (~PAGE_MASK)))
#define VPU_MEM_DEBUG 0
#define VPU_MEM_DEBUG_MSGS 0
#define VPU_MEM_SPLIT_ALLOC 0
#define VPU_MEM_SPLIT_LINK 1
#if VPU_MEM_DEBUG_MSGS
#define DLOG(fmt,args...) \
do { printk(KERN_INFO "[%s:%s:%d] "fmt, __FILE__, __func__, __LINE__, \
@@ -46,13 +43,6 @@
#define DLOG(x...) do {} while (0)
#endif
typedef enum vpu_mem_status {
VDM_FREE,
VDM_USED,
VDM_POST,
VDM_BUTT,
} vdm_st;
/**
* struct for process session which connect to vpu_mem
*
@@ -93,6 +83,9 @@ typedef struct vpu_mem_link_info {
int pfn;
} vdm_link;
/**
* struct for global vpu memory info
*/
typedef struct vpu_mem_info {
struct miscdevice dev;
/* physical start address of the remaped vpu_mem space */
@@ -130,6 +123,12 @@ static int vpu_mem_over = 0;
#define vdm_rwsem (vpu_mem.rw_sem)
#define is_free_region(x) ((0 == (x)->used) && (0 == (x)->post))
/**
* vpu memory info dump:
* first dump global info, then dump each session info
*
* @author ChenHengming (2011-4-20)
*/
static void dump_status(void)
{
vdm_link *link, *tmp_link;
@@ -280,7 +279,14 @@ static int _insert_region_index(vdm_region *region)
return -1;
}
static void _insert_region_status_free(vdm_link *link)
/**
* insert a link into vdm_free list, indexed by vdm_link->index
*
* @author ChenHengming (2011-4-20)
*
* @param link
*/
static void _insert_link_status_free(vdm_link *link)
{
int index = link->index;
int last = -1;
@@ -472,7 +478,7 @@ static void put_free_link(vdm_link *link)
{
list_del_init(&link->session_link);
list_del_init(&link->status_link);
_insert_region_status_free(link);
_insert_link_status_free(link);
}
static void put_used_link(vdm_link *link, vdm_session *session)
@@ -491,6 +497,17 @@ static void put_post_link(vdm_link *link, vdm_session *session)
_insert_link_session_post(link, session);
}
/**
* Create a link and a region by index and pfn at a same time,
* and connect the link with the region
*
* @author ChenHengming (2011-4-20)
*
* @param index
* @param pfn
*
* @return vdm_link*
*/
static vdm_link *new_link_by_index(int index, int pfn)
{
vdm_region *region = (vdm_region *)kmalloc(sizeof(vdm_region), GFP_KERNEL);
@@ -525,6 +542,16 @@ static vdm_link *new_link_by_index(int index, int pfn)
return link;
}
/**
* Create a link from a already exist region and connect to the
* region
*
* @author ChenHengming (2011-4-20)
*
* @param region
*
* @return vdm_link*
*/
static vdm_link *new_link_by_region(vdm_region *region)
{
vdm_link *link = (vdm_link *)kmalloc(sizeof(vdm_link), GFP_KERNEL);
@@ -544,6 +571,13 @@ static vdm_link *new_link_by_region(vdm_region *region)
return link;
}
/**
* Delete a link completely
*
* @author ChenHengming (2011-4-20)
*
* @param link
*/
static void link_del(vdm_link *link)
{
list_del_init(&link->session_link);
@@ -551,6 +585,18 @@ static void link_del(vdm_link *link)
kfree(link);
}
/**
* Called by malloc, check whether a free link can by used for a
* len of pfn, if can then put a used link to status link
*
* @author ChenHengming (2011-4-20)
*
* @param link
* @param session
* @param pfn
*
* @return vdm_link*
*/
static vdm_link *get_used_link_from_free_link(vdm_link *link, vdm_session *session, int pfn)
{
if (pfn > link->pfn) {
@@ -591,8 +637,6 @@ static vdm_link *get_used_link_from_free_link(vdm_link *link, vdm_session *sessi
}
}
#define VPU_MEM_IS_PAGE_ALIGNED(addr) (!((addr) & (~PAGE_MASK)))
static int vpu_mem_release(struct inode *, struct file *);
static int vpu_mem_mmap(struct file *, struct vm_area_struct *);
static int vpu_mem_open(struct inode *, struct file *);
@@ -630,11 +674,12 @@ static long vpu_mem_allocate(struct file *file, unsigned int len)
/* find match free buffer use it first */
vdm_link *used = get_used_link_from_free_link(free, session, pfn);
DLOG("search free buffer at index %d pfn %d for len %d\n", free->index, free->pfn, pfn);
DLOG("found buffer at index %d pfn %d for ptr %x\n", used->index, used->pfn, used);
if (NULL == used)
if (NULL == used) {
continue;
else
} else {
DLOG("found buffer at index %d pfn %d for ptr %x\n", used->index, used->pfn, used);
return used->index;
}
}
if (!vpu_mem_over) {
@@ -1017,41 +1062,24 @@ static ssize_t debug_open(struct inode *inode, struct file *file)
static ssize_t debug_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
#if 0
struct list_head *elt, *elt2;
struct vpu_mem_info *data;
vdm_region *region, *tmp_region;
const int debug_bufmax = 4096;
static char buffer[4096];
int n = 0;
DLOG("debug open\n");
n = scnprintf(buffer, debug_bufmax,
"pid #: mapped regions (offset, len) (offset,len)...\n");
"pid #: mapped regions (offset, len, used, post) ...\n");
down_read(&vdm_rwsem);
list_for_each(elt, &vpu_mem.data_list) {
data = list_entry(elt, struct vpu_mem_info, list);
down_read(&data->sem);
n += scnprintf(buffer + n, debug_bufmax - n, "pid %u:",
data->pid);
list_for_each(elt2, &data->region_list) {
region_node = list_entry(elt2, struct vpu_mem_region_node,
list);
n += scnprintf(buffer + n, debug_bufmax - n,
"(%d,%d) ",
region_node->region.index,
region_node->region.ref_count);
}
n += scnprintf(buffer + n, debug_bufmax - n, "\n");
up_read(&data->sem);
list_for_each_entry_safe(region, tmp_region, &vdm_index, index_list) {
n += scnprintf(buffer + n, debug_bufmax - n,
"(%d,%d,%d,%d) ",
region->index, region->pfn, region->used, region->post);
}
up_read(&vdm_rwsem);
n++;
buffer[n] = 0;
return simple_read_from_buffer(buf, count, ppos, buffer, n);
#else
return 0;
#endif
}
static struct file_operations debug_fops = {