119 	struct idal_buffer *ib;  in idal_buffer_alloc()  local
124 	ib = kmalloc(sizeof(struct idal_buffer) + nr_ptrs*sizeof(void *),  in idal_buffer_alloc()
126 	if (ib == NULL)  in idal_buffer_alloc()
128 	ib->size = size;  in idal_buffer_alloc()
129 	ib->page_order = page_order;  in idal_buffer_alloc()
132 			ib->data[i] = ib->data[i-1] + IDA_BLOCK_SIZE;  in idal_buffer_alloc()
135 		ib->data[i] = (void *)  in idal_buffer_alloc()
137 		if (ib->data[i] != NULL)  in idal_buffer_alloc()
142 			free_pages((unsigned long) ib->data[i],  in idal_buffer_alloc()
143 				   ib->page_order);  in idal_buffer_alloc()
145 		kfree(ib);  in idal_buffer_alloc()
148 	return ib;  in idal_buffer_alloc()
155 idal_buffer_free(struct idal_buffer *ib)  in idal_buffer_free()  argument
159 	nr_ptrs = (ib->size + IDA_BLOCK_SIZE - 1) >> IDA_SIZE_LOG;  in idal_buffer_free()
160 	nr_chunks = (4096 << ib->page_order) >> IDA_SIZE_LOG;  in idal_buffer_free()
162 		free_pages((unsigned long) ib->data[i], ib->page_order);  in idal_buffer_free()
163 	kfree(ib);  in idal_buffer_free()
170 __idal_buffer_is_needed(struct idal_buffer *ib)  in __idal_buffer_is_needed()  argument
172 	return ib->size > (4096ul << ib->page_order) ||  in __idal_buffer_is_needed()
173 		idal_is_needed(ib->data[0], ib->size);  in __idal_buffer_is_needed()
180 idal_buffer_set_cda(struct idal_buffer *ib, struct ccw1 *ccw)  in idal_buffer_set_cda()  argument
182 	if (__idal_buffer_is_needed(ib)) {  in idal_buffer_set_cda()
184 		ccw->cda = (u32)(addr_t) ib->data;  in idal_buffer_set_cda()
188 		ccw->cda = (u32)(addr_t) ib->data[0];  in idal_buffer_set_cda()
189 	ccw->count = ib->size;  in idal_buffer_set_cda()
196 idal_buffer_to_user(struct idal_buffer *ib, void __user *to, size_t count)  in idal_buffer_to_user()  argument
201 	BUG_ON(count > ib->size);  in idal_buffer_to_user()
203 		left = copy_to_user(to, ib->data[i], IDA_BLOCK_SIZE);  in idal_buffer_to_user()
209 	return copy_to_user(to, ib->data[i], count);  in idal_buffer_to_user()
216 idal_buffer_from_user(struct idal_buffer *ib, const void __user *from, size_t count)  in idal_buffer_from_user()  argument
221 	BUG_ON(count > ib->size);  in idal_buffer_from_user()
223 		left = copy_from_user(ib->data[i], from, IDA_BLOCK_SIZE);  in idal_buffer_from_user()
229 	return copy_from_user(ib->data[i], from, count);  in idal_buffer_from_user()