449 lines
16 KiB
C
449 lines
16 KiB
C
/* $NetBSD: atavar.h,v 1.69 2005/06/07 13:45:11 peter Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998, 2001 Manuel Bouyer.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Manuel Bouyer.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _DEV_ATA_ATAVAR_H_
|
|
#define _DEV_ATA_ATAVAR_H_
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/queue.h>
|
|
|
|
/* XXX For scsipi_adapter and scsipi_channel. */
|
|
#include <dev/scsipi/scsipi_all.h>
|
|
#include <dev/scsipi/atapiconf.h>
|
|
|
|
/*
|
|
* Max number of drives per channel.
|
|
*/
|
|
#define ATA_MAXDRIVES 2
|
|
|
|
/*
|
|
* Description of a command to be handled by an ATA controller. These
|
|
* commands are queued in a list.
|
|
*/
|
|
struct ata_xfer {
|
|
__volatile u_int c_flags; /* command state flags */
|
|
|
|
/* Channel and drive that are to process the request. */
|
|
struct ata_channel *c_chp;
|
|
int c_drive;
|
|
|
|
void *c_cmd; /* private request structure pointer */
|
|
void *c_databuf; /* pointer to data buffer */
|
|
int c_bcount; /* byte count left */
|
|
int c_skip; /* bytes already transferred */
|
|
int c_dscpoll; /* counter for dsc polling (ATAPI) */
|
|
|
|
/* Link on the command queue. */
|
|
TAILQ_ENTRY(ata_xfer) c_xferchain;
|
|
|
|
/* Low-level protocol handlers. */
|
|
void (*c_start)(struct ata_channel *, struct ata_xfer *);
|
|
int (*c_intr)(struct ata_channel *, struct ata_xfer *, int);
|
|
void (*c_kill_xfer)(struct ata_channel *, struct ata_xfer *, int);
|
|
};
|
|
|
|
/* flags in c_flags */
|
|
#define C_ATAPI 0x0001 /* xfer is ATAPI request */
|
|
#define C_TIMEOU 0x0002 /* xfer processing timed out */
|
|
#define C_POLL 0x0004 /* command is polled */
|
|
#define C_DMA 0x0008 /* command uses DMA */
|
|
#define C_WAIT 0x0010 /* can use tsleep */
|
|
#define C_WAITACT 0x0020 /* wakeup when active */
|
|
#define C_FREE 0x0040 /* call ata_free_xfer() asap */
|
|
|
|
/* reasons for c_kill_xfer() */
|
|
#define KILL_GONE 1 /* device is gone */
|
|
#define KILL_RESET 2 /* xfer was reset */
|
|
|
|
/* Per-channel queue of ata_xfers. May be shared by multiple channels. */
|
|
struct ata_queue {
|
|
TAILQ_HEAD(, ata_xfer) queue_xfer; /* queue of pending commands */
|
|
int queue_freeze; /* freeze count for the queue */
|
|
struct ata_xfer *active_xfer; /* active command */
|
|
int queue_flags; /* flags for this queue */
|
|
#define QF_IDLE_WAIT 0x01 /* someone is wants the controller idle */
|
|
};
|
|
|
|
/* ATA bus instance state information. */
|
|
struct atabus_softc {
|
|
struct device sc_dev;
|
|
struct ata_channel *sc_chan;
|
|
int sc_flags;
|
|
#define ATABUSCF_OPEN 0x01
|
|
void *sc_powerhook;
|
|
};
|
|
|
|
/*
|
|
* A queue of atabus instances, used to ensure the same bus probe order
|
|
* for a given hardware configuration at each boot.
|
|
*/
|
|
struct atabus_initq {
|
|
TAILQ_ENTRY(atabus_initq) atabus_initq;
|
|
struct atabus_softc *atabus_sc;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
TAILQ_HEAD(atabus_initq_head, atabus_initq);
|
|
extern struct atabus_initq_head atabus_initq_head;
|
|
extern struct simplelock atabus_interlock;
|
|
#endif /* _KERNEL */
|
|
|
|
/* High-level functions and structures used by both ATA and ATAPI devices */
|
|
struct ataparams;
|
|
|
|
/* Datas common to drives and controller drivers */
|
|
struct ata_drive_datas {
|
|
u_int8_t drive; /* drive number */
|
|
int8_t ata_vers; /* ATA version supported */
|
|
u_int16_t drive_flags; /* bitmask for drives present/absent and cap */
|
|
|
|
#define DRIVE_ATA 0x0001
|
|
#define DRIVE_ATAPI 0x0002
|
|
#define DRIVE_OLD 0x0004
|
|
#define DRIVE (DRIVE_ATA|DRIVE_ATAPI|DRIVE_OLD)
|
|
#define DRIVE_CAP32 0x0008
|
|
#define DRIVE_DMA 0x0010
|
|
#define DRIVE_UDMA 0x0020
|
|
#define DRIVE_MODE 0x0040 /* the drive reported its mode */
|
|
#define DRIVE_RESET 0x0080 /* reset the drive state at next xfer */
|
|
#define DRIVE_WAITDRAIN 0x0100 /* device is waiting for the queue to drain */
|
|
#define DRIVE_ATAPIST 0x0200 /* device is an ATAPI tape drive */
|
|
#define DRIVE_NOSTREAM 0x0400 /* no stream methods on this drive */
|
|
|
|
/*
|
|
* Current setting of drive's PIO, DMA and UDMA modes.
|
|
* Is initialised by the disks drivers at attach time, and may be
|
|
* changed later by the controller's code if needed
|
|
*/
|
|
u_int8_t PIO_mode; /* Current setting of drive's PIO mode */
|
|
u_int8_t DMA_mode; /* Current setting of drive's DMA mode */
|
|
u_int8_t UDMA_mode; /* Current setting of drive's UDMA mode */
|
|
|
|
/* Supported modes for this drive */
|
|
u_int8_t PIO_cap; /* supported drive's PIO mode */
|
|
u_int8_t DMA_cap; /* supported drive's DMA mode */
|
|
u_int8_t UDMA_cap; /* supported drive's UDMA mode */
|
|
|
|
/*
|
|
* Drive state.
|
|
* This is reset to 0 after a channel reset.
|
|
*/
|
|
u_int8_t state;
|
|
|
|
#define RESET 0
|
|
#define READY 1
|
|
|
|
/* numbers of xfers and DMA errs. Used by ata_dmaerr() */
|
|
u_int8_t n_dmaerrs;
|
|
u_int32_t n_xfers;
|
|
|
|
/* Downgrade after NERRS_MAX errors in at most NXFER xfers */
|
|
#define NERRS_MAX 4
|
|
#define NXFER 4000
|
|
|
|
/* Callbacks into the drive's driver. */
|
|
void (*drv_done)(void *); /* transfer is done */
|
|
|
|
struct device *drv_softc; /* ATA drives softc, if any */
|
|
void *chnl_softc; /* channel softc */
|
|
};
|
|
|
|
/* User config flags that force (or disable) the use of a mode */
|
|
#define ATA_CONFIG_PIO_MODES 0x0007
|
|
#define ATA_CONFIG_PIO_SET 0x0008
|
|
#define ATA_CONFIG_PIO_OFF 0
|
|
#define ATA_CONFIG_DMA_MODES 0x0070
|
|
#define ATA_CONFIG_DMA_SET 0x0080
|
|
#define ATA_CONFIG_DMA_DISABLE 0x0070
|
|
#define ATA_CONFIG_DMA_OFF 4
|
|
#define ATA_CONFIG_UDMA_MODES 0x0700
|
|
#define ATA_CONFIG_UDMA_SET 0x0800
|
|
#define ATA_CONFIG_UDMA_DISABLE 0x0700
|
|
#define ATA_CONFIG_UDMA_OFF 8
|
|
|
|
/*
|
|
* Parameters/state needed by the controller to perform an ATA bio.
|
|
*/
|
|
struct ata_bio {
|
|
volatile u_int16_t flags;/* cmd flags */
|
|
#define ATA_NOSLEEP 0x0001 /* Can't sleep */
|
|
#define ATA_POLL 0x0002 /* poll for completion */
|
|
#define ATA_ITSDONE 0x0004 /* the transfer is as done as it gets */
|
|
#define ATA_SINGLE 0x0008 /* transfer must be done in singlesector mode */
|
|
#define ATA_LBA 0x0010 /* transfer uses LBA addressing */
|
|
#define ATA_READ 0x0020 /* transfer is a read (otherwise a write) */
|
|
#define ATA_CORR 0x0040 /* transfer had a corrected error */
|
|
#define ATA_LBA48 0x0080 /* transfer uses 48-bit LBA addressing */
|
|
int multi; /* # of blocks to transfer in multi-mode */
|
|
struct disklabel *lp; /* pointer to drive's label info */
|
|
daddr_t blkno; /* block addr */
|
|
daddr_t blkdone;/* number of blks transferred */
|
|
daddr_t nblks; /* number of block currently transferring */
|
|
int nbytes; /* number of bytes currently transferring */
|
|
long bcount; /* total number of bytes */
|
|
char *databuf;/* data buffer address */
|
|
volatile int error;
|
|
#define NOERROR 0 /* There was no error (r_error invalid) */
|
|
#define ERROR 1 /* check r_error */
|
|
#define ERR_DF 2 /* Drive fault */
|
|
#define ERR_DMA 3 /* DMA error */
|
|
#define TIMEOUT 4 /* device timed out */
|
|
#define ERR_NODEV 5 /* device has been gone */
|
|
#define ERR_RESET 6 /* command was terminated by channel reset */
|
|
u_int8_t r_error;/* copy of error register */
|
|
daddr_t badsect[127];/* 126 plus trailing -1 marker */
|
|
};
|
|
|
|
/*
|
|
* ATA/ATAPI commands description
|
|
*
|
|
* This structure defines the interface between the ATA/ATAPI device driver
|
|
* and the controller for short commands. It contains the command's parameter,
|
|
* the len of data's to read/write (if any), and a function to call upon
|
|
* completion.
|
|
* If no sleep is allowed, the driver can poll for command completion.
|
|
* Once the command completed, if the error registed is valid, the flag
|
|
* AT_ERROR is set and the error register value is copied to r_error .
|
|
* A separate interface is needed for read/write or ATAPI packet commands
|
|
* (which need multiple interrupts per commands).
|
|
*/
|
|
struct ata_command {
|
|
u_int8_t r_command; /* Parameters to upload to registers */
|
|
u_int8_t r_head;
|
|
u_int16_t r_cyl;
|
|
u_int8_t r_sector;
|
|
u_int8_t r_count;
|
|
u_int8_t r_features;
|
|
u_int8_t r_st_bmask; /* status register mask to wait for before
|
|
command */
|
|
u_int8_t r_st_pmask; /* status register mask to wait for after
|
|
command */
|
|
u_int8_t r_error; /* error register after command done */
|
|
volatile u_int16_t flags;
|
|
|
|
#define AT_READ 0x0001 /* There is data to read */
|
|
#define AT_WRITE 0x0002 /* There is data to write (excl. with AT_READ) */
|
|
#define AT_WAIT 0x0008 /* wait in controller code for command completion */
|
|
#define AT_POLL 0x0010 /* poll for command completion (no interrupts) */
|
|
#define AT_DONE 0x0020 /* command is done */
|
|
#define AT_XFDONE 0x0040 /* data xfer is done */
|
|
#define AT_ERROR 0x0080 /* command is done with error */
|
|
#define AT_TIMEOU 0x0100 /* command timed out */
|
|
#define AT_DF 0x0200 /* Drive fault */
|
|
#define AT_RESET 0x0400 /* command terminated by channel reset */
|
|
#define AT_GONE 0x0800 /* command terminated because device is gone */
|
|
#define AT_READREG 0x1000 /* Read registers on completion */
|
|
|
|
int timeout; /* timeout (in ms) */
|
|
void *data; /* Data buffer address */
|
|
int bcount; /* number of bytes to transfer */
|
|
void (*callback)(void *); /* command to call once command completed */
|
|
void *callback_arg; /* argument passed to *callback() */
|
|
};
|
|
|
|
/*
|
|
* ata_bustype. The first field must be compatible with scsipi_bustype,
|
|
* as it's used for autoconfig by both ata and atapi drivers.
|
|
*/
|
|
struct ata_bustype {
|
|
int bustype_type; /* symbolic name of type */
|
|
int (*ata_bio)(struct ata_drive_datas *, struct ata_bio *);
|
|
void (*ata_reset_drive)(struct ata_drive_datas *, int);
|
|
void (*ata_reset_channel)(struct ata_channel *, int);
|
|
/* extra flags for ata_reset_*(), in addition to AT_* */
|
|
#define AT_RST_EMERG 0x10000 /* emergency - e.g. for a dump */
|
|
#define AT_RST_NOCMD 0x20000 /* XXX has to go - temporary until we have tagged queuing */
|
|
|
|
int (*ata_exec_command)(struct ata_drive_datas *,
|
|
struct ata_command *);
|
|
|
|
#define ATACMD_COMPLETE 0x01
|
|
#define ATACMD_QUEUED 0x02
|
|
#define ATACMD_TRY_AGAIN 0x03
|
|
|
|
int (*ata_get_params)(struct ata_drive_datas *, u_int8_t,
|
|
struct ataparams *);
|
|
int (*ata_addref)(struct ata_drive_datas *);
|
|
void (*ata_delref)(struct ata_drive_datas *);
|
|
void (*ata_killpending)(struct ata_drive_datas *);
|
|
};
|
|
|
|
/* bustype_type */ /* XXX XXX XXX */
|
|
/* #define SCSIPI_BUSTYPE_SCSI 0 */
|
|
/* #define SCSIPI_BUSTYPE_ATAPI 1 */
|
|
#define SCSIPI_BUSTYPE_ATA 2
|
|
|
|
/*
|
|
* Describe an ATA device. Has to be compatible with scsipi_channel, so
|
|
* start with a pointer to ata_bustype.
|
|
*/
|
|
struct ata_device {
|
|
const struct ata_bustype *adev_bustype;
|
|
int adev_channel;
|
|
int adev_openings;
|
|
struct ata_drive_datas *adev_drv_data;
|
|
};
|
|
|
|
/*
|
|
* Per-channel data
|
|
*/
|
|
struct ata_channel {
|
|
struct callout ch_callout; /* callout handle */
|
|
int ch_channel; /* location */
|
|
struct atac_softc *ch_atac; /* ATA controller softc */
|
|
|
|
/* Our state */
|
|
volatile int ch_flags;
|
|
#define ATACH_SHUTDOWN 0x02 /* channel is shutting down */
|
|
#define ATACH_IRQ_WAIT 0x10 /* controller is waiting for irq */
|
|
#define ATACH_DMA_WAIT 0x20 /* controller is waiting for DMA */
|
|
#define ATACH_DISABLED 0x80 /* channel is disabled */
|
|
#define ATACH_TH_RUN 0x100 /* the kernel thread is working */
|
|
#define ATACH_TH_RESET 0x200 /* someone ask the thread to reset */
|
|
u_int8_t ch_status; /* copy of status register */
|
|
u_int8_t ch_error; /* copy of error register */
|
|
|
|
/* for the reset callback */
|
|
int ch_reset_flags;
|
|
|
|
/* per-drive info */
|
|
int ch_ndrive;
|
|
struct ata_drive_datas ch_drive[ATA_MAXDRIVES];
|
|
|
|
struct device *atabus; /* self */
|
|
|
|
/* ATAPI children */
|
|
struct device *atapibus;
|
|
struct scsipi_channel ch_atapi_channel;
|
|
|
|
/* ATA children */
|
|
struct device *ata_drives[ATA_MAXDRIVES];
|
|
|
|
/*
|
|
* Channel queues. May be the same for all channels, if hw
|
|
* channels are not independent.
|
|
*/
|
|
struct ata_queue *ch_queue;
|
|
|
|
/* The channel kernel thread */
|
|
struct proc *ch_thread;
|
|
};
|
|
|
|
/*
|
|
* ATA controller softc.
|
|
*
|
|
* This contains a bunch of generic info that all ATA controllers need
|
|
* to have.
|
|
*
|
|
* XXX There is still some lingering wdc-centricity here.
|
|
*/
|
|
struct atac_softc {
|
|
struct device atac_dev; /* generic device info */
|
|
|
|
int atac_cap; /* controller capabilities */
|
|
|
|
#define ATAC_CAP_DATA16 0x0001 /* can do 16-bit data access */
|
|
#define ATAC_CAP_DATA32 0x0002 /* can do 32-bit data access */
|
|
#define ATAC_CAP_DMA 0x0008 /* can do ATA DMA modes */
|
|
#define ATAC_CAP_UDMA 0x0010 /* can do ATA Ultra DMA modes */
|
|
#define ATAC_CAP_ATA_NOSTREAM 0x0040 /* don't use stream funcs on ATA */
|
|
#define ATAC_CAP_ATAPI_NOSTREAM 0x0080 /* don't use stream funcs on ATAPI */
|
|
#define ATAC_CAP_NOIRQ 0x1000 /* controller never interrupts */
|
|
#define ATAC_CAP_RAID 0x4000 /* controller "supports" RAID */
|
|
|
|
uint8_t atac_pio_cap; /* highest PIO mode supported */
|
|
uint8_t atac_dma_cap; /* highest DMA mode supported */
|
|
uint8_t atac_udma_cap; /* highest UDMA mode supported */
|
|
|
|
/* Array of pointers to channel-specific data. */
|
|
struct ata_channel **atac_channels;
|
|
int atac_nchannels;
|
|
|
|
const struct ata_bustype *atac_bustype_ata;
|
|
|
|
/*
|
|
* Glue between ATA and SCSIPI for the benefit of ATAPI.
|
|
*
|
|
* Note: The reference count here is used for both ATA and ATAPI
|
|
* devices.
|
|
*/
|
|
struct atapi_adapter atac_atapi_adapter;
|
|
void (*atac_atapibus_attach)(struct atabus_softc *);
|
|
|
|
/* Driver callback to probe for drives. */
|
|
void (*atac_probe)(struct ata_channel *);
|
|
|
|
/* Optional callbacks to lock/unlock hardware. */
|
|
int (*atac_claim_hw)(struct ata_channel *, int);
|
|
void (*atac_free_hw)(struct ata_channel *);
|
|
|
|
/*
|
|
* Optional callbacks to set drive mode. Required for anything
|
|
* but basic PIO operation.
|
|
*/
|
|
void (*atac_set_modes)(struct ata_channel *);
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
void ata_channel_attach(struct ata_channel *);
|
|
int atabusprint(void *aux, const char *);
|
|
int ataprint(void *aux, const char *);
|
|
|
|
struct ataparams;
|
|
int ata_get_params(struct ata_drive_datas *, u_int8_t, struct ataparams *);
|
|
int ata_set_mode(struct ata_drive_datas *, u_int8_t, u_int8_t);
|
|
/* return code for these cmds */
|
|
#define CMD_OK 0
|
|
#define CMD_ERR 1
|
|
#define CMD_AGAIN 2
|
|
|
|
struct ata_xfer *ata_get_xfer(int);
|
|
void ata_free_xfer(struct ata_channel *, struct ata_xfer *);
|
|
#define ATAXF_CANSLEEP 0x00
|
|
#define ATAXF_NOSLEEP 0x01
|
|
|
|
void ata_exec_xfer(struct ata_channel *, struct ata_xfer *);
|
|
void ata_kill_pending(struct ata_drive_datas *);
|
|
void ata_reset_channel(struct ata_channel *, int);
|
|
|
|
int ata_addref(struct ata_channel *);
|
|
void ata_delref(struct ata_channel *);
|
|
void atastart(struct ata_channel *);
|
|
void ata_print_modes(struct ata_channel *);
|
|
int ata_downgrade_mode(struct ata_drive_datas *, int);
|
|
void ata_probe_caps(struct ata_drive_datas *);
|
|
|
|
void ata_dmaerr(struct ata_drive_datas *, int);
|
|
void ata_queue_idle(struct ata_queue *);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _DEV_ATA_ATAVAR_H_ */
|