ata_bd.c File Reference

ATA disk driver. More...

#include <stdio.h>
#include <libarch/ddi.h>
#include <ddi.h>
#include <ipc/bd.h>
#include <async.h>
#include <as.h>
#include <fibril_synch.h>
#include <stdint.h>
#include <str.h>
#include <devmap.h>
#include <sys/types.h>
#include <inttypes.h>
#include <errno.h>
#include <bool.h>
#include <byteorder.h>
#include <task.h>
#include <macros.h>
#include "ata_hw.h"
#include "ata_bd.h"

Go to the source code of this file.

Defines
#define	LEGACY_CTLS   4
	Number of defined legacy controller base addresses.
#define	NAME   "ata_bd"
#define	NAMESPACE   "bd"
Functions
static void	ata_bd_connection (ipc_callid_t iid, ipc_call_t *icall)
	Block device connection handler.
static int	ata_bd_init (void)
	Register driver and enable device I/O.
static int	ata_bd_read_blocks (int disk_id, uint64_t ba, size_t cnt, void *buf)
	Read multiple blocks from the device.
static int	ata_bd_write_blocks (int disk_id, uint64_t ba, size_t cnt, const void *buf)
	Write multiple blocks to the device.
static int	ata_cmd_packet (int dev_idx, const void *cpkt, size_t cpkt_size, void *obuf, size_t obuf_size)
	Issue packet command (i.
static int	ata_pcmd_inquiry (int dev_idx, void *obuf, size_t obuf_size)
	Issue ATAPI Inquiry.
static int	ata_pcmd_read_12 (int dev_idx, uint64_t ba, size_t cnt, void *obuf, size_t obuf_size)
	Issue ATAPI read(12) command.
static int	ata_rcmd_read (int disk_id, uint64_t ba, size_t blk_cnt, void *buf)
	Read a physical from the device.
static int	ata_rcmd_write (int disk_id, uint64_t ba, size_t cnt, const void *buf)
	Write a physical block to the device.
static int	coord_calc (disk_t *d, uint64_t ba, block_coord_t *bc)
	Calculate block coordinates.
static void	coord_sc_program (const block_coord_t *bc, uint16_t scnt)
	Program block coordinates and sector count into ATA registers.
static int	disk_init (disk_t *d, int disk_id)
	Initialize a disk.
static void	disk_print_summary (disk_t *d)
	Print one-line device summary.
static int	drive_identify (int disk_id, void *buf)
	Issue IDENTIFY command.
static int	identify_pkt_dev (int dev_idx, void *buf)
	Issue Identify Packet Device command.
int	main (int argc, char **argv)
static void	print_syntax (void)
static int	wait_status (unsigned set, unsigned n_reset, uint8_t *pstatus, unsigned timeout)
	Wait until some status bits are set and some are reset.
Variables
static ata_cmd_t *	cmd
static uintptr_t	cmd_physical
	I/O base address of the command registers.
static size_t	comm_size
	Size of the communication area.
static ata_ctl_t *	ctl
static uintptr_t	ctl_physical
	I/O base address of the control registers.
static disk_t	disk [MAX_DISKS]
	Per-disk state.
static const size_t	identify_data_size = 512
	Size of data returned from Identify Device or Identify Packet Device command.
static ata_base_t	legacy_base [LEGACY_CTLS]
	I/O base addresses for legacy (ISA-compatible) controllers.

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Detailed Description

ATA disk driver.

This driver supports CHS, 28-bit and 48-bit LBA addressing. It only uses PIO transfers. There is no support DMA, the PACKET feature set or any other fancy features such as S.M.A.R.T, removable devices, etc.

This driver is based on the ATA-1, ATA-2, ATA-3 and ATA/ATAPI-4 through 7 standards, as published by the ANSI, NCITS and INCITS standards bodies, which are freely available. This driver contains no vendor-specific code at this moment.

The driver services a single controller which can have up to two disks attached.

Definition in file ata_bd.c.

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