Changes between Version 4 and Version 5 of cma_driver

Timestamp:

Oct 29, 2014, 12:21:58 PM (10 years ago)

Author:

alain

Comment:

--

cma_driver

@@ -10 +10 @@
 The SEG_CMA_BASE address must be defined in the hard_config.h file.
 
-All accesses to CMA registers are done by the two _cma_set_register() and _cma_get_register() low-level functions, that are handling the extended physical addresses.
-The higher level access functions are defined in the [wiki:fbf_driver fbf_driver] and [wiki:nic_driver nic_driver] files.
-
 The addressable registers map is defined [source:soft/giet_vm/giet_drivers/cma_driver.h here].
 
@@ -21 +18 @@
 This low_level function returns the value contained in register (index).
 
+ === void '''_cma_start_channel'''( unsigned int       channel,
+                         unsigned long long src_paddr,
+                         unsigned int       src_nbufs,
+                         unsigned long long dst_paddr,
+                         unsigned int       dst_nbufs,
+                         unsigned int       buf_length ) ===
+This function activates a chained buffer DMA channel.
+ * channel : CMA channel index.
+ * src_paddr : physical address of the source chbuf.
+ * src_nbufs : number of buffers in the source chbuf.
+ * dst_paddr : physical address of the destination chbuf.
+ * dst_nbufs : number of buffers in the destination chbuf.
+ * buf_length : single buffer length (bytes)
+ * s
+
+ === void '''_cma_stop_channel( unsigned int channel )
+This function desactivates a chained buffer DMA channel.
+ * channel : CMA channel index.
+
  === void '''_cma_isr'''( unsigned int irq_type,  unsigned int irq_id,  unsigned int channel ) ===
 This Interrupt Service Routine handles the IRQ generated by a CMA channel.