3  * CMA DebugFS Interface
10 #include <linux/cma.h>
16 #include "cma.h"
36 	struct cma *cma = data;  in cma_used_get()  local
38 	spin_lock_irq(&cma->lock);  in cma_used_get()
39 	*val = cma->count - cma->available_count;  in cma_used_get()
40 	spin_unlock_irq(&cma->lock);  in cma_used_get()
48 	struct cma *cma = data;  in cma_maxchunk_get()  local
55 	spin_lock_irq(&cma->lock);  in cma_maxchunk_get()
56 	for (r = 0; r < cma->nranges; r++) {  in cma_maxchunk_get()
57 		cmr = &cma->ranges[r];  in cma_maxchunk_get()
58 		bitmap_maxno = cma_bitmap_maxno(cma, cmr);  in cma_maxchunk_get()
62 	spin_unlock_irq(&cma->lock);  in cma_maxchunk_get()
63 	*val = (u64)maxchunk << cma->order_per_bit;  in cma_maxchunk_get()
69 static void cma_add_to_cma_mem_list(struct cma *cma, struct cma_mem *mem)  in cma_add_to_cma_mem_list()  argument
71 	spin_lock(&cma->mem_head_lock);  in cma_add_to_cma_mem_list()
72 	hlist_add_head(&mem->node, &cma->mem_head);  in cma_add_to_cma_mem_list()
73 	spin_unlock(&cma->mem_head_lock);  in cma_add_to_cma_mem_list()
76 static struct cma_mem *cma_get_entry_from_list(struct cma *cma)  in cma_get_entry_from_list()  argument
80 	spin_lock(&cma->mem_head_lock);  in cma_get_entry_from_list()
81 	if (!hlist_empty(&cma->mem_head)) {  in cma_get_entry_from_list()
82 		mem = hlist_entry(cma->mem_head.first, struct cma_mem, node);  in cma_get_entry_from_list()
85 	spin_unlock(&cma->mem_head_lock);  in cma_get_entry_from_list()
90 static int cma_free_mem(struct cma *cma, int count)  in cma_free_mem()  argument
95 		mem = cma_get_entry_from_list(cma);  in cma_free_mem()
100 			cma_release(cma, mem->p, mem->n);  in cma_free_mem()
103 		} else if (cma->order_per_bit == 0) {  in cma_free_mem()
104 			cma_release(cma, mem->p, count);  in cma_free_mem()
108 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
110 			pr_debug("cma: cannot release partial block when order_per_bit != 0\n");  in cma_free_mem()
111 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
123 	struct cma *cma = data;  in cma_free_write()  local
125 	return cma_free_mem(cma, pages);  in cma_free_write()
129 static int cma_alloc_mem(struct cma *cma, int count)  in cma_alloc_mem()  argument
138 	p = cma_alloc(cma, count, 0, false);  in cma_alloc_mem()
147 	cma_add_to_cma_mem_list(cma, mem);  in cma_alloc_mem()
155 	struct cma *cma = data;  in cma_alloc_write()  local
157 	return cma_alloc_mem(cma, pages);  in cma_alloc_write()
161 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)  in cma_debugfs_add_one()  argument
168 	tmp = debugfs_create_dir(cma->name, root_dentry);  in cma_debugfs_add_one()
170 	debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);  in cma_debugfs_add_one()
171 	debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);  in cma_debugfs_add_one()
172 	debugfs_create_file("count", 0444, tmp, &cma->count, &cma_debugfs_fops);  in cma_debugfs_add_one()
174 			    &cma->order_per_bit, &cma_debugfs_fops);  in cma_debugfs_add_one()
175 	debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);  in cma_debugfs_add_one()
176 	debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);  in cma_debugfs_add_one()
179 	for (r = 0; r < cma->nranges; r++) {  in cma_debugfs_add_one()
180 		cmr = &cma->ranges[r];  in cma_debugfs_add_one()
187 			DIV_ROUND_UP(cma_bitmap_maxno(cma, cmr),  in cma_debugfs_add_one()
205 	cma_debugfs_root = debugfs_create_dir("cma", NULL);  in cma_debugfs_init()