61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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/*
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* CMA DebugFS Interface
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*
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* Copyright (c) 2015 Sasha Levin <sasha.levin@oracle.com>
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*/
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#include <linux/debugfs.h>
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#include <linux/cma.h>
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#include "cma.h"
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static struct dentry *cma_debugfs_root;
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static int cma_debugfs_get(void *data, u64 *val)
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{
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unsigned long *p = data;
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*val = *p;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(cma_debugfs_fops, cma_debugfs_get, NULL, "%llu\n");
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static void cma_debugfs_add_one(struct cma *cma, int idx)
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{
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struct dentry *tmp;
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char name[16];
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int u32s;
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sprintf(name, "cma-%d", idx);
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tmp = debugfs_create_dir(name, cma_debugfs_root);
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debugfs_create_file("base_pfn", S_IRUGO, tmp,
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&cma->base_pfn, &cma_debugfs_fops);
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debugfs_create_file("count", S_IRUGO, tmp,
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&cma->count, &cma_debugfs_fops);
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debugfs_create_file("order_per_bit", S_IRUGO, tmp,
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&cma->order_per_bit, &cma_debugfs_fops);
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u32s = DIV_ROUND_UP(cma_bitmap_maxno(cma), BITS_PER_BYTE * sizeof(u32));
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debugfs_create_u32_array("bitmap", S_IRUGO, tmp, (u32*)cma->bitmap, u32s);
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}
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static int __init cma_debugfs_init(void)
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{
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int i;
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cma_debugfs_root = debugfs_create_dir("cma", NULL);
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if (!cma_debugfs_root)
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return -ENOMEM;
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for (i = 0; i < cma_area_count; i++)
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cma_debugfs_add_one(&cma_areas[i], i);
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return 0;
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}
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late_initcall(cma_debugfs_init);
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