167 lines
4.4 KiB
C
167 lines
4.4 KiB
C
/*-
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* Copyright (c) 1999 Jonathan Lemon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* software structures for the Compaq RAID controller
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*/
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#ifndef _IDAVAR_H
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#define _IDAVAR_H
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struct ida_hdr {
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u_int8_t drive; /* logical drive */
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u_int8_t priority; /* block priority */
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u_int16_t size; /* size of request, in words */
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};
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struct ida_req {
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u_int16_t next; /* offset of next request */
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u_int8_t command; /* command */
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u_int8_t error; /* return error code */
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u_int32_t blkno; /* block number */
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u_int16_t bcount; /* block count */
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u_int8_t sgcount; /* number of scatter/gather entries */
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u_int8_t spare; /* reserved */
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};
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struct ida_sgb {
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u_int32_t length; /* length of S/G segment */
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u_int32_t addr; /* physical address of block */
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};
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#define IDA_NSEG 32 /* maximum number of segments */
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/*
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* right now, this structure totals 276 bytes.
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*/
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struct ida_hardware_qcb {
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struct ida_hdr hdr; /* 4 */
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struct ida_req req; /* 12 */
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struct ida_sgb seg[IDA_NSEG]; /* 256 */
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struct ida_qcb *qcb; /* 4 - qcb backpointer */
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};
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typedef enum {
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QCB_FREE = 0x0000,
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QCB_ACTIVE = 0x0001, /* waiting for completion */
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} qcb_state;
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#define DMA_DATA_IN 0x0001
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#define DMA_DATA_OUT 0x0002
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#define IDA_COMMAND 0x0004
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#define DMA_DATA_TRANSFER (DMA_DATA_IN | DMA_DATA_OUT)
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#define IDA_QCB_MAX 256
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#define IDA_CONTROLLER 0 /* drive "number" for controller */
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struct ida_qcb {
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struct ida_hardware_qcb *hwqcb;
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qcb_state state;
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short flags;
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union {
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STAILQ_ENTRY(ida_qcb) stqe;
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SLIST_ENTRY(ida_qcb) sle;
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} link;
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bus_dmamap_t dmamap;
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struct buf *buf; /* buf associated with qcb */
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};
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/*
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* flags for the controller
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*/
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#define IDA_ATTACHED 0x01 /* attached, interrupts okay */
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struct ida_softc {
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device_t dev;
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int unit;
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int regs_res_type;
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int regs_res_id;
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struct resource *regs;
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int irq_res_type;
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struct resource *irq;
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void *ih;
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bus_space_tag_t tag;
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bus_space_handle_t bsh;
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/* various DMA tags */
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bus_dma_tag_t parent_dmat;
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bus_dma_tag_t buffer_dmat;
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bus_dma_tag_t hwqcb_dmat;
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bus_dmamap_t hwqcb_dmamap;
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bus_addr_t hwqcb_busaddr;
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bus_dma_tag_t sg_dmat;
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int num_drives;
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int num_qcbs;
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int flags;
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struct ida_hardware_qcb *hwqcbs; /* HW QCB array */
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struct ida_qcb *qcbs; /* kernel QCB array */
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SLIST_HEAD(, ida_qcb) free_qcbs;
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STAILQ_HEAD(, ida_qcb) qcb_queue;
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struct buf_queue_head buf_queue;
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};
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/*
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* drive flags
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*/
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#define DRV_WRITEPROT 0x0001
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struct id_softc {
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device_t dev;
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struct ida_softc *controller;
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struct diskslices *slices;
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struct devstat stats;
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int unit;
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int cylinders;
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int heads;
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int sectors;
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int secsize;
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int secperunit;
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int flags;
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};
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extern struct ida_softc *ida_alloc(device_t dev, struct resource *regs,
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int regs_type, int regs_id, bus_dma_tag_t parent_dmat);
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extern void ida_free(struct ida_softc *ida);
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extern int ida_init(struct ida_softc *ida);
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extern void ida_attach(struct ida_softc *ida);
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extern int ida_command(struct ida_softc *ida, int command, void *data,
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int datasize, int drive, int flags);
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extern void ida_submit_buf(struct ida_softc *ida, struct buf *bp);
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extern void ida_intr(void *data);
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extern void id_intr(struct buf *bp);
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#endif /* _IDAVAR_H */
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