35 	dma_t *dma = dma_chan + channel;  in request_dma()  local
38 	if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)  in request_dma()
41 	if (xchg(&dma->lock, 1) != 0)  in request_dma()
44 	dma->device_id = device_id;  in request_dma()
45 	dma->active    = 0;  in request_dma()
46 	dma->invalid   = 1;  in request_dma()
49 	if (dma->d_ops->request)  in request_dma()
50 		ret = dma->d_ops->request(channel, dma);  in request_dma()
53 		xchg(&dma->lock, 0);  in request_dma()
73 	dma_t *dma = dma_chan + channel;  in free_dma()  local
75 	if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)  in free_dma()
78 	if (dma->active) {  in free_dma()
80 		dma->d_ops->disable(channel, dma);  in free_dma()
81 		dma->active = 0;  in free_dma()
84 	if (xchg(&dma->lock, 0) != 0) {  in free_dma()
85 		if (dma->d_ops->free)  in free_dma()
86 			dma->d_ops->free(channel, dma);  in free_dma()
102 	dma_t *dma = dma_chan + channel;  in set_dma_sg()  local
104 	if (dma->active)  in set_dma_sg()
108 	dma->sg = sg;  in set_dma_sg()
109 	dma->sgcount = nr_sg;  in set_dma_sg()
110 	dma->invalid = 1;  in set_dma_sg()
120 	dma_t *dma = dma_chan + channel;  in __set_dma_addr()  local
122 	if (dma->active)  in __set_dma_addr()
126 	dma->sg = NULL;  in __set_dma_addr()
127 	dma->addr = addr;  in __set_dma_addr()
128 	dma->invalid = 1;  in __set_dma_addr()
138 	dma_t *dma = dma_chan + channel;  in set_dma_count()  local
140 	if (dma->active)  in set_dma_count()
144 	dma->sg = NULL;  in set_dma_count()
145 	dma->count = count;  in set_dma_count()
146 	dma->invalid = 1;  in set_dma_count()
154 	dma_t *dma = dma_chan + channel;  in set_dma_mode()  local
156 	if (dma->active)  in set_dma_mode()
160 	dma->dma_mode = mode;  in set_dma_mode()
161 	dma->invalid = 1;  in set_dma_mode()
169 	dma_t *dma = dma_chan + channel;  in enable_dma()  local
171 	if (!dma->lock)  in enable_dma()
174 	if (dma->active == 0) {  in enable_dma()
175 		dma->active = 1;  in enable_dma()
176 		dma->d_ops->enable(channel, dma);  in enable_dma()
190 	dma_t *dma = dma_chan + channel;  in disable_dma()  local
192 	if (!dma->lock)  in disable_dma()
195 	if (dma->active == 1) {  in disable_dma()
196 		dma->active = 0;  in disable_dma()
197 		dma->d_ops->disable(channel, dma);  in disable_dma()
224 	dma_t *dma = dma_chan + channel;  in set_dma_speed()  local
227 	if (dma->d_ops->setspeed)  in set_dma_speed()
228 		ret = dma->d_ops->setspeed(channel, dma, cycle_ns);  in set_dma_speed()
229 	dma->speed = ret;  in set_dma_speed()
235 	dma_t *dma = dma_chan + channel;  in get_dma_residue()  local
238 	if (dma->d_ops->residue)  in get_dma_residue()
239 		ret = dma->d_ops->residue(channel, dma);  in get_dma_residue()