[PATCH v3 06/12] eventdev: add support for DMA adapter start and stop

[Amit Prakash Shukla]

Added API support to start and stop DMA adapter.

Signed-off-by: Amit Prakash Shukla <amitpraka...@marvell.com>
---
 lib/eventdev/rte_event_dma_adapter.c | 69 ++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/lib/eventdev/rte_event_dma_adapter.c 
b/lib/eventdev/rte_event_dma_adapter.c
index 8349b95796..e5c2be3a2f 100644
--- a/lib/eventdev/rte_event_dma_adapter.c
+++ b/lib/eventdev/rte_event_dma_adapter.c
@@ -75,6 +75,13 @@ struct dma_device_info {
        /* Next queue pair to be processed */
        uint16_t next_vchan_id;
 
+       /* Set to indicate processing has been started */
+       uint8_t dev_started;
+
+       /* Set to indicate dmadev->eventdev packet
+        * transfer uses a hardware mechanism
+        */
+       uint8_t internal_event_port;
 } __rte_cache_aligned;
 
 struct event_dma_adapter {
@@ -1126,3 +1133,65 @@ rte_event_dma_adapter_vchan_del(uint8_t id, int16_t 
dma_dev_id, uint16_t vchan)
 
        return ret;
 }
+
+static int
+edma_adapter_ctrl(uint8_t id, int start)
+{
+       struct event_dma_adapter *adapter;
+       struct dma_device_info *dev_info;
+       struct rte_eventdev *dev;
+       uint16_t num_dma_dev;
+       int stop = !start;
+       int use_service;
+       uint32_t i;
+
+       use_service = 0;
+       EVENT_DMA_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
+       adapter = edma_id_to_adapter(id);
+       if (adapter == NULL)
+               return -EINVAL;
+
+       num_dma_dev = rte_dma_count_avail();
+       dev = &rte_eventdevs[adapter->eventdev_id];
+
+       for (i = 0; i < num_dma_dev; i++) {
+               dev_info = &adapter->dma_devs[i];
+               /* start check for num queue pairs */
+               if (start && !dev_info->num_vchanq)
+                       continue;
+               /* stop check if dev has been started */
+               if (stop && !dev_info->dev_started)
+                       continue;
+               use_service |= !dev_info->internal_event_port;
+               dev_info->dev_started = start;
+               if (dev_info->internal_event_port == 0)
+                       continue;
+               start ? (*dev->dev_ops->dma_adapter_start)(dev, i) :
+                       (*dev->dev_ops->dma_adapter_stop)(dev, i);
+       }
+
+       if (use_service)
+               rte_service_runstate_set(adapter->service_id, start);
+
+       return 0;
+}
+
+int
+rte_event_dma_adapter_start(uint8_t id)
+{
+       struct event_dma_adapter *adapter;
+
+       EVENT_DMA_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
+
+       adapter = edma_id_to_adapter(id);
+       if (adapter == NULL)
+               return -EINVAL;
+
+       return edma_adapter_ctrl(id, 1);
+}
+
+int
+rte_event_dma_adapter_stop(uint8_t id)
+{
+       return edma_adapter_ctrl(id, 0);
+}
-- 
2.25.1