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Diffstat (limited to 'sys/dev/ida/idavar.h')
| -rw-r--r-- | sys/dev/ida/idavar.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/sys/dev/ida/idavar.h b/sys/dev/ida/idavar.h new file mode 100644 index 0000000..7b8012a --- /dev/null +++ b/sys/dev/ida/idavar.h @@ -0,0 +1,166 @@ +/*- + * Copyright (c) 1999 Jonathan Lemon + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. + * + * $Id$ + */ + +/* + * software structures for the Compaq RAID controller + */ + +#ifndef _IDAVAR_H +#define _IDAVAR_H + +struct ida_hdr { + u_int8_t drive; /* logical drive */ + u_int8_t priority; /* block priority */ + u_int16_t size; /* size of request, in words */ +}; + +struct ida_req { + u_int16_t next; /* offset of next request */ + u_int8_t command; /* command */ + u_int8_t error; /* return error code */ + u_int32_t blkno; /* block number */ + u_int16_t bcount; /* block count */ + u_int8_t sgcount; /* number of scatter/gather entries */ + u_int8_t spare; /* reserved */ +}; + +struct ida_sgb { + u_int32_t length; /* length of S/G segment */ + u_int32_t addr; /* physical address of block */ +}; + +#define IDA_NSEG 32 /* maximum number of segments */ + +/* + * right now, this structure totals 276 bytes. + */ +struct ida_hardware_qcb { + struct ida_hdr hdr; /* 4 */ + struct ida_req req; /* 12 */ + struct ida_sgb seg[IDA_NSEG]; /* 256 */ + struct ida_qcb *qcb; /* 4 - qcb backpointer */ +}; + +typedef enum { + QCB_FREE = 0x0000, + QCB_ACTIVE = 0x0001, /* waiting for completion */ +} qcb_state; + +#define DMA_DATA_IN 0x0001 +#define DMA_DATA_OUT 0x0002 +#define IDA_COMMAND 0x0004 +#define DMA_DATA_TRANSFER (DMA_DATA_IN | DMA_DATA_OUT) + +#define IDA_QCB_MAX 256 +#define IDA_CONTROLLER 0 /* drive "number" for controller */ + +struct ida_qcb { + struct ida_hardware_qcb *hwqcb; + qcb_state state; + short flags; + union { + STAILQ_ENTRY(ida_qcb) stqe; + SLIST_ENTRY(ida_qcb) sle; + } link; + bus_dmamap_t dmamap; + struct buf *buf; /* buf associated with qcb */ +}; + +/* + * flags for the controller + */ +#define IDA_ATTACHED 0x01 /* attached, interrupts okay */ + +struct ida_softc { + device_t dev; + int unit; + + int regs_res_type; + int regs_res_id; + struct resource *regs; + + int irq_res_type; + struct resource *irq; + void *ih; + + bus_space_tag_t tag; + bus_space_handle_t bsh; + + /* various DMA tags */ + bus_dma_tag_t parent_dmat; + bus_dma_tag_t buffer_dmat; + + bus_dma_tag_t hwqcb_dmat; + bus_dmamap_t hwqcb_dmamap; + bus_addr_t hwqcb_busaddr; + + bus_dma_tag_t sg_dmat; + + int num_drives; + int num_qcbs; + int flags; + + struct ida_hardware_qcb *hwqcbs; /* HW QCB array */ + struct ida_qcb *qcbs; /* kernel QCB array */ + SLIST_HEAD(, ida_qcb) free_qcbs; + STAILQ_HEAD(, ida_qcb) qcb_queue; + struct buf_queue_head buf_queue; +}; + +/* + * drive flags + */ +#define DRV_WRITEPROT 0x0001 + +struct id_softc { + device_t dev; + struct ida_softc *controller; + struct diskslices *slices; + struct devstat stats; + int unit; + int cylinders; + int heads; + int sectors; + int secsize; + int secperunit; + int flags; +}; + +extern struct ida_softc *ida_alloc(device_t dev, struct resource *regs, + int regs_type, int regs_id, bus_dma_tag_t parent_dmat); +extern void ida_free(struct ida_softc *ida); +extern int ida_init(struct ida_softc *ida); +extern void ida_attach(struct ida_softc *ida); +extern int ida_command(struct ida_softc *ida, int command, void *data, + int datasize, int drive, int flags); +extern void ida_submit_buf(struct ida_softc *ida, struct buf *bp); +extern void ida_intr(void *data); + +extern void id_intr(struct buf *bp); + +#endif /* _IDAVAR_H */ |
