/* $NetBSD: atavar.h,v 1.64 2004/08/20 23:26:54 thorpej 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 #include /* XXX For scsipi_adapter and scsipi_channel. */ #include #include /* * 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); }; /* vlags 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 */ /* 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 */ }; /* ATA bus instance state information. */ struct atabus_softc { struct device sc_dev; struct ata_channel *sc_chan; int sc_flags; #define ATABUSCF_OPEN 0x01 }; /* * 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 kenrel 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); #endif /* _KERNEL */ #endif /* _DEV_ATA_ATAVAR_H_ */