1 // SPDX-License-Identifier: GPL-2.0
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()
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()
59 		for_each_clear_bitrange(start, end, cmr->bitmap, bitmap_maxno)  in cma_maxchunk_get()
60 			maxchunk = max(end - start, maxchunk);  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()
78 	struct cma_mem *mem = NULL;  in cma_get_entry_from_list()  local
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()
83 		hlist_del_init(&mem->node);  in cma_get_entry_from_list()
85 	spin_unlock(&cma->mem_head_lock);  in cma_get_entry_from_list()
87 	return mem;  in cma_get_entry_from_list()
92 	struct cma_mem *mem = NULL;  in cma_free_mem()  local
95 		mem = cma_get_entry_from_list(cma);  in cma_free_mem()
96 		if (mem == NULL)  in cma_free_mem()
99 		if (mem->n <= count) {  in cma_free_mem()
100 			cma_release(cma, mem->p, mem->n);  in cma_free_mem()
101 			count -= mem->n;  in cma_free_mem()
102 			kfree(mem);  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()
105 			mem->p += count;  in cma_free_mem()
106 			mem->n -= count;  in cma_free_mem()
108 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
111 			cma_add_to_cma_mem_list(cma, mem);  in cma_free_mem()
131 	struct cma_mem *mem;  in cma_alloc_mem()  local
134 	mem = kzalloc_obj(*mem);  in cma_alloc_mem()
135 	if (!mem)  in cma_alloc_mem()
136 		return -ENOMEM;  in cma_alloc_mem()
140 		kfree(mem);  in cma_alloc_mem()
141 		return -ENOMEM;  in cma_alloc_mem()
144 	mem->p = p;  in cma_alloc_mem()
145 	mem->n = count;  in cma_alloc_mem()
147 	cma_add_to_cma_mem_list(cma, mem);  in cma_alloc_mem()
168 	tmp = debugfs_create_dir(cma->name, root_dentry);  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()
179 	for (r = 0; r < cma->nranges; r++) {  in cma_debugfs_add_one()
180 		cmr = &cma->ranges[r];  in cma_debugfs_add_one()
184 			    &cmr->base_pfn, &cma_debugfs_fops);  in cma_debugfs_add_one()
185 		cmr->dfs_bitmap.array = (u32 *)cmr->bitmap;  in cma_debugfs_add_one()
186 		cmr->dfs_bitmap.n_elements =  in cma_debugfs_add_one()
190 				&cmr->dfs_bitmap);  in cma_debugfs_add_one()