Resource: Add accessor to read the status field from a VDEV struct.

The Linux host will write a VIRTIO_CONFIG_* status into the remote processor
resource table upon completion of VDEV creation.

As this corresponds to priming of vring buffers for RPMSG type VDEVs, this is
a useful status for the slave to poll before it sends it's first RPMSG
to the host.

Other non-Linux HLOS must implement a similar status update mechanism.

Signed-off-by: G Anthony <a0783926@ti.com>

diff --git a/packages/ti/ipc/remoteproc/Resource.c b/packages/ti/ipc/remoteproc/Resource.c
index 3f23a52ee57f70683c6906e99205af41ddfc09e5..34603fc1d7f333afbb60ab4028908d39ab04c675 100644 (file)
--- a/packages/ti/ipc/remoteproc/Resource.c
+++ b/packages/ti/ipc/remoteproc/Resource.c
@@ -37,6 +37,7 @@
 
 #include <xdc/runtime/System.h>
 #include <xdc/runtime/Startup.h>
+#include <ti/sysbios/hal/Cache.h>
 
 #include "rsc_types.h"
 #include "package/internal/Resource.xdc.h"
@@ -66,6 +67,36 @@ Ptr Resource_getTraceBufPtr()
     return (NULL);
 }
 
+/*
+ *  ======== getVdevStatus ========
+ */
+Char Resource_getVdevStatus(UInt32 id)
+{
+    UInt32 i;
+    UInt32 offset;
+    UInt32 type;
+    Char status = 0;
+    struct fw_rsc_vdev *vdev= NULL;
+    Resource_RscTable *table = (Resource_RscTable *)
+                                            (Resource_module->pTable);
+
+    for (i = 0; i < module->pTable->num; i++) {
+        offset = (UInt32)((Char *)table + table->offset[i]);
+        type = *(UInt32 *)offset;
+        if (type == TYPE_VDEV) {
+            vdev = (struct fw_rsc_vdev *)offset;
+            if (vdev->id == id) {
+                /* invalidate memory as host will update the status field */
+                Cache_inv(vdev, sizeof(*vdev), Cache_Type_ALL, TRUE);
+                status = vdev->status;
+                break;
+            }
+        }
+    }
+
+    return (status);
+}
+
 /*
  *  ======== Resource_getVringDA ========
  */

diff --git a/packages/ti/ipc/remoteproc/Resource.xdc b/packages/ti/ipc/remoteproc/Resource.xdc
index 1ef430461544a69f009052324034a3bd980067ef..8051cfc29bcb5cebb506536e4d5da2eeb90a2a42 100644 (file)
--- a/packages/ti/ipc/remoteproc/Resource.xdc
+++ b/packages/ti/ipc/remoteproc/Resource.xdc
@@ -139,6 +139,14 @@ module Resource {
     @DirectCall
     Ptr getTraceBufPtr();
 
+    /*!
+     *  @brief      Get the status field of the VDEV, given the fw_rsc_vdev id.
+     *
+     *  @return     status value which is set by Virtio device on HLOS.
+     */
+    @DirectCall
+    Char getVdevStatus(UInt32 id);
+
     /*!
      *  @brief      Get the nth (vqId) vring address from the VDEV struct.
      *