Lines Matching refs:dma
21 struct uart_8250_dma *dma = p->dma; in __dma_tx_complete() local
26 dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr, in __dma_tx_complete()
31 dma->tx_running = 0; in __dma_tx_complete()
33 xmit->tail += dma->tx_size; in __dma_tx_complete()
35 p->port.icount.tx += dma->tx_size; in __dma_tx_complete()
52 struct uart_8250_dma *dma = p->dma; in __dma_rx_complete() local
57 dma->rx_running = 0; in __dma_rx_complete()
58 dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state); in __dma_rx_complete()
60 count = dma->rx_size - state.residue; in __dma_rx_complete()
62 tty_insert_flip_string(tty_port, dma->rx_buf, count); in __dma_rx_complete()
70 struct uart_8250_dma *dma = p->dma; in serial8250_tx_dma() local
75 if (uart_tx_stopped(&p->port) || dma->tx_running || in serial8250_tx_dma()
79 dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); in serial8250_tx_dma()
81 desc = dmaengine_prep_slave_single(dma->txchan, in serial8250_tx_dma()
82 dma->tx_addr + xmit->tail, in serial8250_tx_dma()
83 dma->tx_size, DMA_MEM_TO_DEV, in serial8250_tx_dma()
90 dma->tx_running = 1; in serial8250_tx_dma()
94 dma->tx_cookie = dmaengine_submit(desc); in serial8250_tx_dma()
96 dma_sync_single_for_device(dma->txchan->device->dev, dma->tx_addr, in serial8250_tx_dma()
99 dma_async_issue_pending(dma->txchan); in serial8250_tx_dma()
100 if (dma->tx_err) { in serial8250_tx_dma()
101 dma->tx_err = 0; in serial8250_tx_dma()
109 dma->tx_err = 1; in serial8250_tx_dma()
115 struct uart_8250_dma *dma = p->dma; in serial8250_rx_dma() local
127 if (dma->rx_running) { in serial8250_rx_dma()
128 dmaengine_pause(dma->rxchan); in serial8250_rx_dma()
130 dmaengine_terminate_all(dma->rxchan); in serial8250_rx_dma()
137 if (dma->rx_running) in serial8250_rx_dma()
140 desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr, in serial8250_rx_dma()
141 dma->rx_size, DMA_DEV_TO_MEM, in serial8250_rx_dma()
146 dma->rx_running = 1; in serial8250_rx_dma()
150 dma->rx_cookie = dmaengine_submit(desc); in serial8250_rx_dma()
152 dma_async_issue_pending(dma->rxchan); in serial8250_rx_dma()
159 struct uart_8250_dma *dma = p->dma; in serial8250_request_dma() local
163 dma->rxconf.direction = DMA_DEV_TO_MEM; in serial8250_request_dma()
164 dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
165 dma->rxconf.src_addr = p->port.mapbase + UART_RX; in serial8250_request_dma()
167 dma->txconf.direction = DMA_MEM_TO_DEV; in serial8250_request_dma()
168 dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
169 dma->txconf.dst_addr = p->port.mapbase + UART_TX; in serial8250_request_dma()
175 dma->rxchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
176 dma->fn, dma->rx_param, in serial8250_request_dma()
178 if (!dma->rxchan) in serial8250_request_dma()
181 dmaengine_slave_config(dma->rxchan, &dma->rxconf); in serial8250_request_dma()
184 dma->txchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
185 dma->fn, dma->tx_param, in serial8250_request_dma()
187 if (!dma->txchan) { in serial8250_request_dma()
188 dma_release_channel(dma->rxchan); in serial8250_request_dma()
192 dmaengine_slave_config(dma->txchan, &dma->txconf); in serial8250_request_dma()
195 if (!dma->rx_size) in serial8250_request_dma()
196 dma->rx_size = PAGE_SIZE; in serial8250_request_dma()
198 dma->rx_buf = dma_alloc_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
199 &dma->rx_addr, GFP_KERNEL); in serial8250_request_dma()
200 if (!dma->rx_buf) in serial8250_request_dma()
204 dma->tx_addr = dma_map_single(dma->txchan->device->dev, in serial8250_request_dma()
208 if (dma_mapping_error(dma->txchan->device->dev, dma->tx_addr)) { in serial8250_request_dma()
209 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
210 dma->rx_buf, dma->rx_addr); in serial8250_request_dma()
218 dma_release_channel(dma->rxchan); in serial8250_request_dma()
219 dma_release_channel(dma->txchan); in serial8250_request_dma()
227 struct uart_8250_dma *dma = p->dma; in serial8250_release_dma() local
229 if (!dma) in serial8250_release_dma()
233 dmaengine_terminate_all(dma->rxchan); in serial8250_release_dma()
234 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, dma->rx_buf, in serial8250_release_dma()
235 dma->rx_addr); in serial8250_release_dma()
236 dma_release_channel(dma->rxchan); in serial8250_release_dma()
237 dma->rxchan = NULL; in serial8250_release_dma()
240 dmaengine_terminate_all(dma->txchan); in serial8250_release_dma()
241 dma_unmap_single(dma->txchan->device->dev, dma->tx_addr, in serial8250_release_dma()
243 dma_release_channel(dma->txchan); in serial8250_release_dma()
244 dma->txchan = NULL; in serial8250_release_dma()
245 dma->tx_running = 0; in serial8250_release_dma()