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
57 dma_status = dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state); in __dma_rx_complete()
61 count = dma->rx_size - state.residue; in __dma_rx_complete()
63 tty_insert_flip_string(tty_port, dma->rx_buf, count); in __dma_rx_complete()
65 dma->rx_running = 0; in __dma_rx_complete()
73 struct uart_8250_dma *dma = p->dma; in dma_rx_complete() local
77 if (dma->rx_running) in dma_rx_complete()
84 struct uart_8250_dma *dma = p->dma; in serial8250_tx_dma() local
90 if (dma->tx_running) { in serial8250_tx_dma()
92 dmaengine_pause(dma->txchan); in serial8250_tx_dma()
94 dmaengine_resume(dma->txchan); in serial8250_tx_dma()
107 dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); in serial8250_tx_dma()
111 desc = dmaengine_prep_slave_single(dma->txchan, in serial8250_tx_dma()
112 dma->tx_addr + xmit->tail, in serial8250_tx_dma()
113 dma->tx_size, DMA_MEM_TO_DEV, in serial8250_tx_dma()
120 dma->tx_running = 1; in serial8250_tx_dma()
124 dma->tx_cookie = dmaengine_submit(desc); in serial8250_tx_dma()
126 dma_sync_single_for_device(dma->txchan->device->dev, dma->tx_addr, in serial8250_tx_dma()
129 dma_async_issue_pending(dma->txchan); in serial8250_tx_dma()
130 if (dma->tx_err) { in serial8250_tx_dma()
131 dma->tx_err = 0; in serial8250_tx_dma()
136 dma->tx_err = 1; in serial8250_tx_dma()
142 struct uart_8250_dma *dma = p->dma; in serial8250_rx_dma() local
145 if (dma->rx_running) in serial8250_rx_dma()
150 desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr, in serial8250_rx_dma()
151 dma->rx_size, DMA_DEV_TO_MEM, in serial8250_rx_dma()
156 dma->rx_running = 1; in serial8250_rx_dma()
160 dma->rx_cookie = dmaengine_submit(desc); in serial8250_rx_dma()
162 dma_async_issue_pending(dma->rxchan); in serial8250_rx_dma()
169 struct uart_8250_dma *dma = p->dma; in serial8250_rx_dma_flush() local
171 if (dma->rx_running) { in serial8250_rx_dma_flush()
172 dmaengine_pause(dma->rxchan); in serial8250_rx_dma_flush()
174 dmaengine_terminate_async(dma->rxchan); in serial8250_rx_dma_flush()
181 struct uart_8250_dma *dma = p->dma; in serial8250_request_dma() local
182 phys_addr_t rx_dma_addr = dma->rx_dma_addr ? in serial8250_request_dma()
183 dma->rx_dma_addr : p->port.mapbase; in serial8250_request_dma()
184 phys_addr_t tx_dma_addr = dma->tx_dma_addr ? in serial8250_request_dma()
185 dma->tx_dma_addr : p->port.mapbase; in serial8250_request_dma()
191 dma->rxconf.direction = DMA_DEV_TO_MEM; in serial8250_request_dma()
192 dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
193 dma->rxconf.src_addr = rx_dma_addr + UART_RX; in serial8250_request_dma()
195 dma->txconf.direction = DMA_MEM_TO_DEV; in serial8250_request_dma()
196 dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; in serial8250_request_dma()
197 dma->txconf.dst_addr = tx_dma_addr + UART_TX; in serial8250_request_dma()
203 dma->rxchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
204 dma->fn, dma->rx_param, in serial8250_request_dma()
206 if (!dma->rxchan) in serial8250_request_dma()
210 ret = dma_get_slave_caps(dma->rxchan, &caps); in serial8250_request_dma()
219 dmaengine_slave_config(dma->rxchan, &dma->rxconf); in serial8250_request_dma()
222 dma->txchan = dma_request_slave_channel_compat(mask, in serial8250_request_dma()
223 dma->fn, dma->tx_param, in serial8250_request_dma()
225 if (!dma->txchan) { in serial8250_request_dma()
231 ret = dma_get_slave_caps(dma->txchan, &caps); in serial8250_request_dma()
239 dmaengine_slave_config(dma->txchan, &dma->txconf); in serial8250_request_dma()
242 if (!dma->rx_size) in serial8250_request_dma()
243 dma->rx_size = PAGE_SIZE; in serial8250_request_dma()
245 dma->rx_buf = dma_alloc_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
246 &dma->rx_addr, GFP_KERNEL); in serial8250_request_dma()
247 if (!dma->rx_buf) { in serial8250_request_dma()
253 dma->tx_addr = dma_map_single(dma->txchan->device->dev, in serial8250_request_dma()
257 if (dma_mapping_error(dma->txchan->device->dev, dma->tx_addr)) { in serial8250_request_dma()
258 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, in serial8250_request_dma()
259 dma->rx_buf, dma->rx_addr); in serial8250_request_dma()
268 dma_release_channel(dma->txchan); in serial8250_request_dma()
270 dma_release_channel(dma->rxchan); in serial8250_request_dma()
277 struct uart_8250_dma *dma = p->dma; in serial8250_release_dma() local
279 if (!dma) in serial8250_release_dma()
283 dmaengine_terminate_sync(dma->rxchan); in serial8250_release_dma()
284 dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, dma->rx_buf, in serial8250_release_dma()
285 dma->rx_addr); in serial8250_release_dma()
286 dma_release_channel(dma->rxchan); in serial8250_release_dma()
287 dma->rxchan = NULL; in serial8250_release_dma()
290 dmaengine_terminate_sync(dma->txchan); in serial8250_release_dma()
291 dma_unmap_single(dma->txchan->device->dev, dma->tx_addr, in serial8250_release_dma()
293 dma_release_channel(dma->txchan); in serial8250_release_dma()
294 dma->txchan = NULL; in serial8250_release_dma()
295 dma->tx_running = 0; in serial8250_release_dma()