Changeset 449 for soft/giet_vm/giet_kernel/sys_handler.h

Timestamp:

Nov 11, 2014, 4:14:55 PM (10 years ago)

Author:

alain

Message:

Introducing the CMA_RX, CMA_TX, NIC_RX, NIC_TX slots in the task context.
This allows an user task to have a private NIC channel and a private CMA channel.

File:

• soft/giet_vm/giet_kernel/sys_handler.h (modified) (4 diffs)

soft/giet_vm/giet_kernel/sys_handler.h

@@ -14 +14 @@
 
 #include <mapping_info.h>
+#include <giet_config.h>
 
 ///////////////////////////////////////////////////////////////////////////////////
@@ -22 +23 @@
 
 ///////////////////////////////////////////////////////////////////////////////////
-// This structure can be used by the vci_chbuf_dma component to transfer a stream 
+// This structure is used by the vci_chbuf_dma component to transfer a stream 
 // of images from two buffers in user space to the frame buffer in kernel space.
 // It contains two chbuf descriptors
@@ -35 +36 @@
     unsigned long long  fbf;      // physical address + status for user buffer 0 
     unsigned int        length;   // buffer length (bytes)
-    unsigned int        padding;  // for 32 bytes alignment
+    unsigned int        padding;  // 8 bytes alignment
 } fbf_chbuf_t;   
+
+//////////////////////////////////////////////////////////////////////////////////
+// This structure define the generic chained buffer used by the vci_chbuf_dma
+// component to move a stream of containers to or from the vci_multi_nic component.
+// The same structure is used for both TX or RX transfers.
+// The single buffer size and the number of buffers must be defined by the 
+// GIET_NIC_CHBUF_SIZE and GIET_NIC_CHBUF_NBUFS parameters in giet_config.h.
+// - The buffer array is the chbuf descriptor, shared by the vci_chbuf_dma,
+//   and by the kernel.
+// - The index field is only used by the kernel. It define the currently pointed 
+//   buffer for read (RX transfer) or write (TX transfer).
+//////////////////////////////////////////////////////////////////////////////////
+
+typedef struct nic_chbuf_s
+{
+    unsigned long long  buffer[GIET_NIC_CHBUF_NBUFS];      // chbuf descriptor 
+    unsigned int        index;                             // current buffer index
+    unsigned int        padding;                           // 8 bytes alignment
+} nic_chbuf_t;
+
 
 //////////////////////////////////////////////////////////////////////////////////
@@ -72 +93 @@
 //////////////////////////////////////////////////////////////////////////////
 
-int _sys_nic_alloc();
+int _sys_nic_alloc( unsigned int is_rx );
 
-int _sys_nic_sync_send( void* vbuf );
+int _sys_nic_start( unsigned int is_rx,
+                    unsigned int mac4,
+                    unsigned int mac2 );
 
-int _sys_nic_sync_receive( void* vbuf );
+int _sys_nic_move( unsigned int is_rx,
+                   void*        buffer );
+
+int _sys_nic_stop( unsigned int is_rx );
 
 //////////////////////////////////////////////////////////////////////////////