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()
70 	spin_unlock_irq(&cma->lock);  in cma_maxchunk_get()
71 	*val = (u64)maxchunk << cma->order_per_bit;  in cma_maxchunk_get()
77 static void cma_add_to_cma_mem_list(struct cma *cma, struct cma_mem *mem)  in cma_add_to_cma_mem_list()  argument
79 	spin_lock(&cma->mem_head_lock);  in cma_add_to_cma_mem_list()
80 	hlist_add_head(&mem->node, &cma->mem_head);  in cma_add_to_cma_mem_list()
81 	spin_unlock(&cma->mem_head_lock);  in cma_add_to_cma_mem_list()
84 static struct cma_mem *cma_get_entry_from_list(struct cma *cma)  in cma_get_entry_from_list()  argument
88 	spin_lock(&cma->mem_head_lock);  in cma_get_entry_from_list()
89 	if (!hlist_empty(&cma->mem_head)) {  in cma_get_entry_from_list()
90 		mem = hlist_entry(cma->mem_head.first, struct cma_mem, node);  in cma_get_entry_from_list()
93 	spin_unlock(&cma->mem_head_lock);  in cma_get_entry_from_list()
98 static int cma_free_mem(struct cma *cma, int count)  in cma_free_mem()  argument
103 		mem = cma_get_entry_from_list(cma);  in cma_free_mem()
108 			cma_release(cma, mem->p, mem->n);  in cma_free_mem()
111 		} else if (cma->order_per_bit == 0) {  in cma_free_mem()
112 			cma_release(cma, mem->p, count);  in cma_free_mem()
116 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
118 			pr_debug("cma: cannot release partial block when order_per_bit != 0\n");  in cma_free_mem()
119 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
131 	struct cma *cma = data;  in cma_free_write()  local
133 	return cma_free_mem(cma, pages);  in cma_free_write()
137 static int cma_alloc_mem(struct cma *cma, int count)  in cma_alloc_mem()  argument
146 	p = cma_alloc(cma, count, 0, false);  in cma_alloc_mem()
155 	cma_add_to_cma_mem_list(cma, mem);  in cma_alloc_mem()
163 	struct cma *cma = data;  in cma_alloc_write()  local
165 	return cma_alloc_mem(cma, pages);  in cma_alloc_write()
169 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)  in cma_debugfs_add_one()  argument
176 	tmp = debugfs_create_dir(cma->name, root_dentry);  in cma_debugfs_add_one()
178 	debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);  in cma_debugfs_add_one()
179 	debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);  in cma_debugfs_add_one()
180 	debugfs_create_file("count", 0444, tmp, &cma->count, &cma_debugfs_fops);  in cma_debugfs_add_one()
182 			    &cma->order_per_bit, &cma_debugfs_fops);  in cma_debugfs_add_one()
183 	debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);  in cma_debugfs_add_one()
184 	debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);  in cma_debugfs_add_one()
187 	for (r = 0; r < cma->nranges; r++) {  in cma_debugfs_add_one()
188 		cmr = &cma->ranges[r];  in cma_debugfs_add_one()
195 			DIV_ROUND_UP(cma_bitmap_maxno(cma, cmr),  in cma_debugfs_add_one()
213 	cma_debugfs_root = debugfs_create_dir("cma", NULL);  in cma_debugfs_init()