Lines Matching refs:dma
17 struct uart_8250_dma *dma = p->dma; in __dma_tx_complete() local
22 dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr, in __dma_tx_complete()
27 dma->tx_running = 0; in __dma_tx_complete()
29 xmit->tail += dma->tx_size; in __dma_tx_complete()
31 p->port.icount.tx += dma->tx_size; in __dma_tx_complete()
46 struct uart_8250_dma *dma = p->dma; in __dma_rx_complete() local
51 dma->rx_running = 0; in __dma_rx_complete()
52 dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state); in __dma_rx_complete()
54 count = dma->rx_size - state.residue; in __dma_rx_complete()
56 tty_insert_flip_string(tty_port, dma->rx_buf, count); in __dma_rx_complete()
64 struct uart_8250_dma *dma = p->dma; in serial8250_tx_dma() local
69 if (dma->tx_running) in serial8250_tx_dma()
78 dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); in serial8250_tx_dma()
80 desc = dmaengine_prep_slave_single(dma->txchan, in serial8250_tx_dma()
81 dma->tx_addr + xmit->tail, in serial8250_tx_dma()
82 dma->tx_size, DMA_MEM_TO_DEV, in serial8250_tx_dma()
89 dma->tx_running = 1; in serial8250_tx_dma()
93 dma->tx_cookie = dmaengine_submit(desc); in serial8250_tx_dma()
95 dma_sync_single_for_device(dma->txchan->device->dev, dma->tx_addr, in serial8250_tx_dma()
98 dma_async_issue_pending(dma->txchan); in serial8250_tx_dma()
99 if (dma->tx_err) { in serial8250_tx_dma()
100 dma->tx_err = 0; in serial8250_tx_dma()
105 dma->tx_err = 1; in serial8250_tx_dma()
111 struct uart_8250_dma *dma = p->dma; in serial8250_rx_dma() local
114 if (dma->rx_running) in serial8250_rx_dma()
117 desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr, in serial8250_rx_dma()
118 dma->rx_size, DMA_DEV_TO_MEM, in serial8250_rx_dma()
123 dma->rx_running = 1; in serial8250_rx_dma()
127 dma->rx_cookie = dmaengine_submit(desc); in serial8250_rx_dma()
129 dma_async_issue_pending(dma->rxchan); in serial8250_rx_dma()
136 struct uart_8250_dma *dma = p->dma; in serial8250_rx_dma_flush() local
138 if (dma->rx_running) { in serial8250_rx_dma_flush()
139 dmaengine_pause(dma->rxchan); in serial8250_rx_dma_flush()
141 dmaengine_terminate_async(dma->rxchan); in serial8250_rx_dma_flush()
148 struct uart_8250_dma *dma = p->dma; in serial8250_request_dma() local
149 phys_addr_t rx_dma_addr = dma->rx_dma_addr ? in serial8250_request_dma()
150 dma->rx_dma_addr : p->port.mapbase; in serial8250_request_dma()
151 phys_addr_t tx_dma_addr = dma->tx_dma_addr ? in serial8250_request_dma()
152 dma->tx_dma_addr : p->port.mapbase; in serial8250_request_dma()
158 dma->rxconf.direction = DMA_DEV_TO_MEM; in serial8250_request_dma()
159 dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
160 dma->rxconf.src_addr = rx_dma_addr + UART_RX; in serial8250_request_dma()
162 dma->txconf.direction = DMA_MEM_TO_DEV; in serial8250_request_dma()
163 dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
164 dma->txconf.dst_addr = tx_dma_addr + UART_TX; in serial8250_request_dma()
170 dma->rxchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
171 dma->fn, dma->rx_param, in serial8250_request_dma()
173 if (!dma->rxchan) in serial8250_request_dma()
177 ret = dma_get_slave_caps(dma->rxchan, &caps); in serial8250_request_dma()
186 dmaengine_slave_config(dma->rxchan, &dma->rxconf); in serial8250_request_dma()
189 dma->txchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
190 dma->fn, dma->tx_param, in serial8250_request_dma()
192 if (!dma->txchan) { in serial8250_request_dma()
198 ret = dma_get_slave_caps(dma->txchan, &caps); in serial8250_request_dma()
206 dmaengine_slave_config(dma->txchan, &dma->txconf); in serial8250_request_dma()
209 if (!dma->rx_size) in serial8250_request_dma()
210 dma->rx_size = PAGE_SIZE; in serial8250_request_dma()
212 dma->rx_buf = dma_alloc_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
213 &dma->rx_addr, GFP_KERNEL); in serial8250_request_dma()
214 if (!dma->rx_buf) { in serial8250_request_dma()
220 dma->tx_addr = dma_map_single(dma->txchan->device->dev, in serial8250_request_dma()
224 if (dma_mapping_error(dma->txchan->device->dev, dma->tx_addr)) { in serial8250_request_dma()
225 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
226 dma->rx_buf, dma->rx_addr); in serial8250_request_dma()
235 dma_release_channel(dma->txchan); in serial8250_request_dma()
237 dma_release_channel(dma->rxchan); in serial8250_request_dma()
244 struct uart_8250_dma *dma = p->dma; in serial8250_release_dma() local
246 if (!dma) in serial8250_release_dma()
250 dmaengine_terminate_sync(dma->rxchan); in serial8250_release_dma()
251 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, dma->rx_buf, in serial8250_release_dma()
252 dma->rx_addr); in serial8250_release_dma()
253 dma_release_channel(dma->rxchan); in serial8250_release_dma()
254 dma->rxchan = NULL; in serial8250_release_dma()
257 dmaengine_terminate_sync(dma->txchan); in serial8250_release_dma()
258 dma_unmap_single(dma->txchan->device->dev, dma->tx_addr, in serial8250_release_dma()
260 dma_release_channel(dma->txchan); in serial8250_release_dma()
261 dma->txchan = NULL; in serial8250_release_dma()
262 dma->tx_running = 0; in serial8250_release_dma()