20 	struct uart_8250_port	*p = param;  in __dma_tx_complete()  local
21 	struct uart_8250_dma	*dma = p->dma;  in __dma_tx_complete()
22 	struct circ_buf		*xmit = &p->port.state->xmit;  in __dma_tx_complete()
29 	spin_lock_irqsave(&p->port.lock, flags);  in __dma_tx_complete()
35 	p->port.icount.tx += dma->tx_size;  in __dma_tx_complete()
38 		uart_write_wakeup(&p->port);  in __dma_tx_complete()
40 	ret = serial8250_tx_dma(p);  in __dma_tx_complete()
42 		p->ier |= UART_IER_THRI;  in __dma_tx_complete()
43 		serial_port_out(&p->port, UART_IER, p->ier);  in __dma_tx_complete()
46 	spin_unlock_irqrestore(&p->port.lock, flags);  in __dma_tx_complete()
51 	struct uart_8250_port	*p = param;  in __dma_rx_complete()  local
52 	struct uart_8250_dma	*dma = p->dma;  in __dma_rx_complete()
53 	struct tty_port		*tty_port = &p->port.state->port;  in __dma_rx_complete()
66 	p->port.icount.rx += count;  in __dma_rx_complete()
71 int serial8250_tx_dma(struct uart_8250_port *p)  in serial8250_tx_dma()  argument
73 	struct uart_8250_dma		*dma = p->dma;  in serial8250_tx_dma()
74 	struct circ_buf			*xmit = &p->port.state->xmit;  in serial8250_tx_dma()
78 	if (uart_tx_stopped(&p->port) || dma->tx_running ||  in serial8250_tx_dma()
95 	desc->callback_param = p;  in serial8250_tx_dma()
105 		if (p->ier & UART_IER_THRI) {  in serial8250_tx_dma()
106 			p->ier &= ~UART_IER_THRI;  in serial8250_tx_dma()
107 			serial_out(p, UART_IER, p->ier);  in serial8250_tx_dma()
116 int serial8250_rx_dma(struct uart_8250_port *p, unsigned int iir)  in serial8250_rx_dma()  argument
118 	struct uart_8250_dma		*dma = p->dma;  in serial8250_rx_dma()
132 			__dma_rx_complete(p);  in serial8250_rx_dma()
151 	desc->callback_param = p;  in serial8250_rx_dma()
163 int serial8250_request_dma(struct uart_8250_port *p)  in serial8250_request_dma()  argument
165 	struct uart_8250_dma	*dma = p->dma;  in serial8250_request_dma()
171 	dma->rxconf.src_addr		= p->port.mapbase + UART_RX;  in serial8250_request_dma()
175 	dma->txconf.dst_addr		= p->port.mapbase + UART_TX;  in serial8250_request_dma()
183 						       p->port.dev, "rx");  in serial8250_request_dma()
192 						       p->port.dev, "tx");  in serial8250_request_dma()
211 					p->port.state->xmit.buf,  in serial8250_request_dma()
220 	dev_dbg_ratelimited(p->port.dev, "got both dma channels\n");  in serial8250_request_dma()
231 void serial8250_release_dma(struct uart_8250_port *p)  in serial8250_release_dma()  argument
233 	struct uart_8250_dma *dma = p->dma;  in serial8250_release_dma()
253 	dev_dbg_ratelimited(p->port.dev, "dma channels released\n");  in serial8250_release_dma()