/* $NetBSD: esiopvar.h,v 1.17 2009/03/15 15:52:12 cegger Exp $ */ /* * Copyright (c) 2002 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. * */ /* structure and definitions for the siop driver */ /* Number of tag */ #define ESIOP_NTAG 256 /* * description of a command scheduler slot. The script uses a ring of * A_ncmd_slots of this. */ struct esiop_slot { u_int32_t dsa; /* DSA of the xfer. The first 2 bits holds flags */ } __packed; #define CMD_SLOTSIZE (sizeof(struct esiop_slot) / sizeof(u_int32_t)) /* * xfer description of the script: tables and reselect script * In struct siop_common_cmd siop_xfer will point to this. * If you change this don't forget to update o_cmd_* and cmd_slot_size in script */ struct esiop_xfer { struct siop_common_xfer siop_tables; u_int32_t tlq; /* target/lun/tag loaded in scratchC by script */ u_int32_t saved_offset;/* contains scratchA if script saved an offset */ } __packed; #define ESIOP_XFER(cmd, m) (((struct esiop_xfer *)((cmd)->cmd_tables))->m) /* * This describes a command handled by the SCSI controller * These are chained in either a free list or a active list * We have one queue per target */ struct esiop_cmd { TAILQ_ENTRY (esiop_cmd) next; struct siop_common_cmd cmd_c; struct esiop_cbd *esiop_cbdp; /* pointer to our siop_cbd */ }; #define cmd_tables cmd_c.siop_tables /* command block descriptors: an array of siop_cmd + an array of siop_xfer */ struct esiop_cbd { TAILQ_ENTRY (esiop_cbd) next; struct esiop_cmd *cmds; struct esiop_xfer *xfers; bus_dmamap_t xferdma; /* DMA map for this block of xfers */ }; TAILQ_HEAD(cmd_list, esiop_cmd); TAILQ_HEAD(cbd_list, esiop_cbd); /* DSA table descriptor for tags. Free tables are in a list */ struct esiop_dsatbl { TAILQ_ENTRY (esiop_dsatbl) next; u_int32_t *tbl; /* the table itself */ u_int32_t tbl_dsa; /* DSA of base of this table */ bus_addr_t tbl_offset; /* offset of this table in the map */ struct esiop_dsatblblk *tblblk; /* pointer back to our block */ }; /* DSA table block descriptor. */ struct esiop_dsatblblk { TAILQ_ENTRY (esiop_dsatblblk) next; bus_dmamap_t blkmap; /* DMA map of this block */ }; TAILQ_HEAD(tbl_list, esiop_dsatbl); TAILQ_HEAD(tblblk_list, esiop_dsatblblk); /* Number of table per block */ #define ESIOP_NTPB ((PAGE_SIZE) / (sizeof(u_int32_t) * ESIOP_NTAG)) /* per lun struct */ struct esiop_lun { struct esiop_cmd *active; /* active non-tagged command */ struct esiop_cmd *tactive[ESIOP_NTAG]; /* active tagged commands */ int lun_flags; /* per-lun flags */ struct esiop_dsatbl *lun_tagtbl; /* the tag DSA table */ }; /* * per target struct; siop_common_cmd->target and siop_common_softc->targets[] * will point to this */ struct esiop_target { struct siop_common_target target_c; struct esiop_lun *esiop_lun[8]; /* per-lun state */ u_int32_t lun_table_offset; /* pointer to our DSA table */ }; static __inline void esiop_table_sync(struct esiop_cmd *, int); static __inline void esiop_table_sync(struct esiop_cmd *esiop_cmd, int ops) { struct siop_common_softc *sc = esiop_cmd->cmd_c.siop_sc; bus_addr_t offset; offset = esiop_cmd->cmd_c.dsa - esiop_cmd->esiop_cbdp->xferdma->dm_segs[0].ds_addr; bus_dmamap_sync(sc->sc_dmat, esiop_cmd->esiop_cbdp->xferdma, offset, sizeof(struct esiop_xfer), ops); } /* Driver internal state */ struct esiop_softc { struct siop_common_softc sc_c; u_int32_t sc_semoffset; /* semaphore */ u_int32_t sc_shedoffset; /* base of scheduler ring */ int sc_currschedslot; /* current scheduler slot */ struct cbd_list cmds; /* list of command block descriptors */ struct cmd_list free_list; /* cmd descr free list */ struct tbl_list free_tagtbl; /* list of free tag DSA tables */ struct tblblk_list tag_tblblk; /* tag DSA table blocks */ u_int32_t sc_flags; u_int32_t sc_free_offset; /* pointer to free RAM */ u_int32_t sc_target_table_offset;/* pointer to target DSA table */ int sc_currdoneslot; /* current done slot */ bus_dmamap_t sc_done_map; /* dma map for done ring (shared) */ bus_addr_t sc_done_offset; /* offset of ring in sc_done_map */ u_int32_t *sc_done_slot; /* The done ring itself */ }; /* defs for sc_flags */ #define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */ #define SCF_CHAN_ADAPTREQ 0x0002 /* esiop_scsipi_request() is running */ void esiop_attach(struct esiop_softc *); int esiop_intr(void *); void esiop_add_dev(struct esiop_softc *, int, int); void esiop_del_dev(struct esiop_softc *, int, int);