Changes between Initial Version and Version 1 of hba_driver

Timestamp:

Oct 9, 2014, 3:11:14 PM (10 years ago)

Author:

alain

Comment:

--

hba_driver

@@ +1 @@
+= GIET-VM / HBA Driver = 
+
+[[PageOutline]]
+
+The [source:soft/giet_vm/giet_drivers/hba_driver.c hba_driver.c] and [source:soft/giet_vm/giet_drivers/hba_driver.h hba_driver.h] files define the HBA driver.
+
+The ''vci_multi_ahci'' component is a multi-channels, block oriented, external mass storage controller respecting the AHCI standard.
+
+It is one of the physical disk driver that can be called by the generic IOC driver, and the SEG_IOC_BASE address must be defined in the hard_config.h file.
+
+The addressable registers map is defined [source:soft/giet_vm/giet_drivers/hba_driver.h here]. 
+
+ === unsigned int '''_hba_init'' ( unsigned int channel ) === 
+This function initializes for a given channel
+ *  the HBA hardware registers,
+ *  the command list pointer,
+ *  the command lists physical addresse,
+ *  the command tables physical addresses array,
+
+ === unsigned int '''_hba_write'''( unsigned int channel,   unsigned int mode,  unsigned int lba,  unsigned long long paddr,  unsigned int count ) ===    
+This function register a write command in Command List and Command Table for a single physical buffer, and updates the HBA_PXCI register.
+ * channel : channel index
+ * mode :   BOOT / KERNEL / USER
+ * lba :  logic bloc address on device
+ * paddr : memory buffer physical base address
+ * count : number of blocs
+Returns 0 if success, > 0 if error.
+
+ === unsigned int '''_hba_read'''( unsigned int channel,   unsigned int mode,  unsigned int lba,  unsigned long long paddr,  unsigned int count ) ===    
+This function register a read command in Command List and Command Table for a single physical buffer, and updates the HBA_PXCI register.
+ * channel : channel index
+ * mode :   BOOT / KERNEL / USER
+ * lba :  logic bloc address on device
+ * paddr : memory buffer physical base address
+ * count : number of blocs
+Returns 0 if success, > 0 if error.
+
+ === unsigned int '''_hba_get_block_size''' () ===
+This function returns the block_size of HBA controller
+
+ === unsigned int '''_hba_get_status'''( unsigned int   channel ) ===
+This function returns the content of the HBA_PXIS register for a given channel,  and reset this register to acknoledge IRQ.
+Return 0 if success, > 0 if error
+