ata.c File Reference

Advanced Technology Attachment (ATA) and Advanced Technology Attachment Packet Interface (ATAPI) drivers. More...

Classes
struct	ata_identity_t
	IDENTIFY device data (response to 0xEC). More...
struct	prdt_t
	Physical Region Descriptor Table (PRDT) entry. More...
struct	ata_device_t
	Stores information about an ATA device. More...

Macros
#define	__DEBUG_HEADER__   "[ATA ]"
	Change header.
#define	__DEBUG_LEVEL__   LOGLEVEL_NOTICE
	Set log level.
#define	ATA_SECTOR_SIZE   512
	The sector size.
#define	ATA_DMA_SIZE   512
	The size of the DMA area.

Typedefs
typedef struct ata_identity_t	ata_identity_t
	IDENTIFY device data (response to 0xEC).
typedef struct prdt_t	prdt_t
	Physical Region Descriptor Table (PRDT) entry. More...
typedef struct ata_device_t	ata_device_t
	Stores information about an ATA device.

Functions
static const char *	ata_get_device_error_str (uint8_t error)
	Returns the set of ATA errors as a string. More...
static const char *	ata_get_device_status_str (uint8_t status)
	Returns the device status as a string. More...
static const char *	ata_get_device_settings_str (ata_device_t *dev)
	Returns the device configuration as string. More...
static const char *	ata_get_device_type_str (ata_device_type_t type)
	Returns the device type as string. More...
static void	ata_dump_device (ata_device_t *dev)
	Dumps on debugging output the device data. More...
static void	ata_io_wait (ata_device_t *dev)
	Waits for approximately 400 nanoseconds by performing four I/O reads. More...
static int	ata_status_wait_not (ata_device_t *dev, long mask, long timeout)
	Waits until the status bits selected through the mask are zero. More...
static int	ata_status_wait_for (ata_device_t *dev, long mask, long timeout)
	Waits until the status bits selected through the mask are set. More...
static void	ata_print_status_error (ata_device_t *dev)
	Prints the status and error information about the device. More...
static uint64_t	ata_max_offset (ata_device_t *dev)
	Ge the maximum offset for the given device. More...
static void	ata_fix_string (char *str, size_t len)
	Fixes all ATA-related strings. More...
static void	ata_soft_reset (ata_device_t *dev)
	Performs a soft reset of the device. More...
static uintptr_t	ata_dma_alloc (size_t size, uintptr_t *physical)
	Creates the DMA memory area used to write and read on the device. More...
static int	ata_dma_free (uintptr_t logical_addr)
	Frees the DMA memory area previously allocated. More...
static int	ata_dma_enable_bus_mastering (void)
	Enables bus mastering, allowing Direct Memory Access (DMA) transactions. More...
static int	ata_dma_disable_bus_mastering (void)
	Disables bus mastering, preventing Direct Memory Access (DMA) transactions. More...
static int	ata_dma_initialize_bus_mastering_address (ata_device_t *dev)
	Initializes the bus mastering register (BMR) fields of the ATA device. More...
static ata_device_type_t	ata_detect_device_type (ata_device_t *dev)
	Detects the type of device. More...
static bool_t	ata_device_init (ata_device_t *dev)
	Initialises the given device. More...
static void	ata_device_read_sector (ata_device_t *dev, uint32_t lba_sector, uint8_t *buffer)
	Reads an ATA sector. More...
static void	ata_device_write_sector (ata_device_t *dev, uint32_t lba_sector, uint8_t *buffer)
	Writs an ATA sector. More...
static vfs_file_t *	ata_open (const char *path, int flags, mode_t mode)
	Implements the open function for an ATA device. More...
static int	ata_close (vfs_file_t *file)
	Closes an ATA device. More...
static ssize_t	ata_read (vfs_file_t *file, char *buffer, off_t offset, size_t size)
	Reads from an ATA device. More...
static ssize_t	ata_write (vfs_file_t *file, const void *buffer, off_t offset, size_t size)
	Writes on an ATA device. More...
static int	_ata_stat (const ata_device_t *dev, stat_t *stat)
	Stats an ATA device. More...
static int	ata_fstat (vfs_file_t *file, stat_t *stat)
	Retrieves information concerning the file at the given position. More...
static int	ata_stat (const char *path, stat_t *stat)
	Retrieves information concerning the file at the given position. More...
static vfs_file_t *	ata_mount_callback (const char *path, const char *device)
	The mount call-back, which prepares everything and calls the actual ATA mount function. More...
static vfs_file_t *	ata_device_create (ata_device_t *dev)
	Creates a VFS file, starting from an ATA device. More...
static ata_device_type_t	ata_device_detect (ata_device_t *dev)
	Detects and mount the given ATA device. More...
static void	ata_irq_handler_master (pt_regs *f)
static void	ata_irq_handler_slave (pt_regs *f)
static void	pci_find_ata (uint32_t device, uint16_t vendorid, uint16_t deviceid, void *extra)
	Used while scanning the PCI interface. More...
int	ata_initialize (void)
	Initializes the ATA drivers. More...
int	ata_finalize (void)
	De-initializes the ATA drivers. More...

Variables
static char	ata_drive_char = 'a'
	Keeps track of the incremental letters for the ATA drives.
static int	cdrom_number = 0
	Keeps track of the incremental number for removable media.
static uint32_t	ata_pci = 0x00000000
	We store the ATA pci address here.
static ata_device_t	ata_primary_master
	The ATA primary master control register locations. More...
static ata_device_t	ata_primary_slave
	The ATA primary slave control register locations. More...
static ata_device_t	ata_secondary_master
	The ATA secondary master control register locations. More...
static ata_device_t	ata_secondary_slave
	The ATA secondary slave control register locations. More...
static file_system_type	ata_file_system_type
	Filesystem information. More...
static vfs_sys_operations_t	ata_sys_operations
	Filesystem general operations. More...
static vfs_file_operations_t	ata_fs_operations
	ATA filesystem file operations. More...

Detailed Description

Advanced Technology Attachment (ATA) and Advanced Technology Attachment Packet Interface (ATAPI) drivers.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.