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rk29: vpu_mem: add /proc/vpu_mem module

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陈恒明
2010-12-13 22:20:01 -08:00
parent a772f9a89e
commit caec313e1a
1 changed files with 70 additions and 0 deletions
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70
arch/arm/mach-rk29/vpu_mem.c
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@@ -958,4 +958,74 @@ static void __exit vpu_mem_exit(void)
module_init(vpu_mem_init);
module_exit(vpu_mem_exit);
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static int proc_vpu_mem_show(struct seq_file *s, void *v)
{
unsigned int i;
if (vpu_mem.bitmap) {
seq_printf(s, "vpu mem opened\n");
} else {
seq_printf(s, "vpu mem closed\n");
return 0;
}
down_read(&vpu_mem.bitmap_sem);
{
// <20><>ӡ bitmap <20>е<EFBFBD>ȫ<EFBFBD><C8AB> region
for (i = 0; i < vpu_mem.num_entries; i = VPU_MEM_NEXT_INDEX(i)) {
region_check(i);
seq_printf(s, "vpu_mem: idx %6d pfn %6d refc %3d avail %3d\n",
i, VPU_MEM_PFN(i), VPU_MEM_REFC(i), VPU_MEM_AVAIL(i));
}
// <20><>ӡ vpu_mem_data <20>е<EFBFBD>ȫ<EFBFBD><C8AB> region
down(&vpu_mem.data_list_sem);
{ // search exists index
struct list_head *list, *tmp_list;
list_for_each_safe(list, tmp_list, &vpu_mem.data_list) {
struct list_head *region, *tmp_data;
struct vpu_mem_data *data = list_entry(list, struct vpu_mem_data, list);
seq_printf(s, "pid: %d\n", data->pid);
down_read(&data->sem);
list_for_each_safe(region, tmp_data, &data->region_list) {
struct vpu_mem_region_node *node = list_entry(region, struct vpu_mem_region_node, list);
i = node->region.index;
seq_printf(s, " region: idx %6d pfn %6d refc %3d avail %3d ref by %d\n",
i, VPU_MEM_PFN(i), VPU_MEM_REFC(i), VPU_MEM_AVAIL(i), node->region.ref_count);
}
up_read(&data->sem);
}
}
up(&vpu_mem.data_list_sem);
}
up_read(&vpu_mem.bitmap_sem);
return 0;
}
static int proc_vpu_mem_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_vpu_mem_show, NULL);
}
static const struct file_operations proc_vpu_mem_fops = {
.open = proc_vpu_mem_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init vpu_mem_proc_init(void)
{
proc_create("vpu_mem", 0, NULL, &proc_vpu_mem_fops);
return 0;
}
late_initcall(vpu_mem_proc_init);
#endif /* CONFIG_PROC_FS */