Changeset 6fd365d in mainline for uspace/lib/drv/generic/remote_hw_res.c

Timestamp:

2012-08-18T14:20:28Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1864948

Parents:

bc6762f

Message:

libc,libdrv: Add remaining bytes query to DMA(hw_res) interface.

File:

• uspace/lib/drv/generic/remote_hw_res.c (modified) (3 diffs)

uspace/lib/drv/generic/remote_hw_res.c

@@ -46 +46 @@
 static void remote_hw_res_dma_channel_setup(ddf_fun_t *, void *, ipc_callid_t,
     ipc_call_t *);
+static void remote_hw_res_dma_channel_remain(ddf_fun_t *, void *, ipc_callid_t,
+    ipc_call_t *);
 
 static remote_iface_func_ptr_t remote_hw_res_iface_ops [] = {
@@ -51 +53 @@
         [HW_RES_ENABLE_INTERRUPT] = &remote_hw_res_enable_interrupt,
         [HW_RES_DMA_CHANNEL_SETUP] = &remote_hw_res_dma_channel_setup,
+        [HW_RES_DMA_CHANNEL_REMAIN] = &remote_hw_res_dma_channel_remain,
 };
 
@@ -117 +120 @@
 }
 
+static void remote_hw_res_dma_channel_remain(ddf_fun_t *fun, void *ops,
+    ipc_callid_t callid, ipc_call_t *call)
+{
+        hw_res_ops_t *hw_res_ops = ops;
+
+        if (hw_res_ops->dma_channel_setup == NULL) {
+                async_answer_0(callid, ENOTSUP);
+                return;
+        }
+        const unsigned channel = DEV_IPC_GET_ARG1(*call);
+        uint16_t remain = 0;
+        const int ret = hw_res_ops->dma_channel_remain(fun, channel, &remain);
+        async_answer_1(callid, ret, remain);
+}
 /**
  * @}