598 	struct circ_buf *xmit = &port->state->xmit;  in sci_transmit_chars()  local
607 		if (uart_circ_empty(xmit))  in sci_transmit_chars()
623 		} else if (!uart_circ_empty(xmit) && !stopped) {  in sci_transmit_chars()
624 			c = xmit->buf[xmit->tail];  in sci_transmit_chars()
625 			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in sci_transmit_chars()
637 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in sci_transmit_chars()
639 	if (uart_circ_empty(xmit)) {  in sci_transmit_chars()
1258 	struct circ_buf *xmit = &port->state->xmit;  in sci_dma_tx_complete()  local
1265 	xmit->tail += sg_dma_len(&s->sg_tx);  in sci_dma_tx_complete()
1266 	xmit->tail &= UART_XMIT_SIZE - 1;  in sci_dma_tx_complete()
1273 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in sci_dma_tx_complete()
1276 	if (!uart_circ_empty(xmit)) {  in sci_dma_tx_complete()
1477 	struct circ_buf *xmit = &port->state->xmit;  in work_fn_tx()  local
1488 	sg->offset = xmit->tail & (UART_XMIT_SIZE - 1);  in work_fn_tx()
1491 	sg_dma_len(sg) = min((int)CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE),  in work_fn_tx()
1492 		CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE));  in work_fn_tx()
1522 		__func__, xmit->buf, xmit->tail, xmit->head, s->cookie_tx);  in work_fn_tx()
1544 	if (s->chan_tx && !uart_circ_empty(&s->port.state->xmit) &&  in sci_start_tx()
1684 		BUG_ON((uintptr_t)port->state->xmit.buf & ~PAGE_MASK);  in sci_request_dma()
1685 		sg_set_page(&s->sg_tx, virt_to_page(port->state->xmit.buf),  in sci_request_dma()
1687 			    (uintptr_t)port->state->xmit.buf & ~PAGE_MASK);  in sci_request_dma()
1694 				sg_dma_len(&s->sg_tx), port->state->xmit.buf,  in sci_request_dma()