pci/ctxfi/ctvmem.c

26  * Find or create vm block based on requested @size.
30 get_vm_block(struct ct_vm *vm, unsigned int size, struct ct_atc *atc)
36 	if (size > vm->size) {
42 	mutex_lock(&vm->lock);
43 	list_for_each(pos, &vm->unused) {
48 	if (pos == &vm->unused)
52 		/* Move the vm node from unused list to used list directly */
53 		list_move(&entry->list, &vm->used);
54 		vm->size -= size;
65 	list_add(&block->list, &vm->used);
68 	vm->size -= size;
71 	mutex_unlock(&vm->lock);
75 static void put_vm_block(struct ct_vm *vm, struct ct_vm_block *block)
82 	mutex_lock(&vm->lock);
84 	vm->size += block->size;
86 	list_for_each(pos, &vm->unused) {
91 	if (pos == &vm->unused) {
92 		list_add_tail(&block->list, &vm->unused);
107 	while (pre != &vm->unused) {
119 	mutex_unlock(&vm->lock);
124 ct_vm_map(struct ct_vm *vm, struct snd_pcm_substream *substream, int size)
132 	block = get_vm_block(vm, size, atc);
139 	ptp = (unsigned long *)vm->ptp[0].area;
152 static void ct_vm_unmap(struct ct_vm *vm, struct ct_vm_block *block)
155 	put_vm_block(vm, block);
164 ct_get_ptp_phys(struct ct_vm *vm, int index)
166 	return (index >= CT_PTP_NUM) ? ~0UL : vm->ptp[index].addr;
171 	struct ct_vm *vm;
177 	vm = kzalloc(sizeof(*vm), GFP_KERNEL);
178 	if (!vm)
181 	mutex_init(&vm->lock);
187 					  PAGE_SIZE, &vm->ptp[i]);
193 		ct_vm_destroy(vm);
196 	vm->size = CT_ADDRS_PER_PAGE * i;
197 	vm->map = ct_vm_map;
198 	vm->unmap = ct_vm_unmap;
199 	vm->get_ptp_phys = ct_get_ptp_phys;
200 	INIT_LIST_HEAD(&vm->unused);
201 	INIT_LIST_HEAD(&vm->used);
205 		block->size = vm->size;
206 		list_add(&block->list, &vm->unused);
209 	*rvm = vm;
215 void ct_vm_destroy(struct ct_vm *vm)
222 	while (!list_empty(&vm->used)) {
223 		pos = vm->used.next;
228 	while (!list_empty(&vm->unused)) {
229 		pos = vm->unused.next;
237 		snd_dma_free_pages(&vm->ptp[i]);
239 	vm->size = 0;
241 	kfree(vm);