/*
* Copyright (c) 2000 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.
*
* 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.
*
*/
#include "opt_siop.h"
/* common struct and routines used by siop and esiop */
/* tables used by SCRIPT */
typedef struct scr_table {
uint32_t count;
uint32_t addr;
} __packed scr_table_t;
/* Number of scatter/gather entries */
#define SIOP_NSG (MAXPHYS/PAGE_SIZE + 1) /* XXX PAGE_SIZE */
/*
* This structure interfaces the SCRIPT with the driver; it describes a full
* transfer.
* If you change something here, don't forget to update offsets in {s,es}iop.ss
*/
struct siop_common_xfer {
uint8_t msg_out[16]; /* 0 */
uint8_t msg_in[16]; /* 16 */
uint32_t status; /* 32 */
uint32_t pad1; /* 36 */
uint32_t id; /* 40 */
uint32_t pad2; /* 44 */
scr_table_t t_msgin; /* 48 */
scr_table_t t_extmsgin; /* 56 */
scr_table_t t_extmsgdata; /* 64 */
scr_table_t t_msgout; /* 72 */
scr_table_t cmd; /* 80 */
scr_table_t t_status; /* 88 */
scr_table_t data[SIOP_NSG]; /* 96 */
} __packed;
/* status can hold the SCSI_* status values, and 2 additional values: */
#define SCSI_SIOP_NOCHECK 0xfe /* don't check the scsi status */
#define SCSI_SIOP_NOSTATUS 0xff /* device didn't report status */
/* offset is initialised to SIOP_NOOFFSET, used to check if it was updated */
#define SIOP_NOOFFSET 0xffffffff
/*
* This describes a command handled by the SCSI controller
*/
struct siop_common_cmd {
struct siop_common_softc *siop_sc; /* points back to our adapter */
struct siop_common_target *siop_target; /* pointer to our target def */
struct scsipi_xfer *xs; /* xfer from the upper level */
struct siop_common_xfer *siop_tables; /* tables for this cmd */
bus_addr_t dsa; /* DSA value to load */
bus_dmamap_t dmamap_cmd;
bus_dmamap_t dmamap_data;
int status;
int flags;
int tag; /* tag used for tagged command queuing */
int resid; /* valid when CMDFL_RESID is set */
};
/* status defs */
#define CMDST_FREE 0 /* cmd slot is free */
#define CMDST_READY 1 /* cmd slot is waiting for processing */
#define CMDST_ACTIVE 2 /* cmd slot is being processed */
#define CMDST_DONE 3 /* cmd slot has been processed */
/* flags defs */
#define CMDFL_TIMEOUT 0x0001 /* cmd timed out */
#define CMDFL_TAG 0x0002 /* tagged cmd */
#define CMDFL_RESID 0x0004 /* current offset in table is partial */
/* per-target struct */
struct siop_common_target {
int status; /* target status, see below */
int flags; /* target flags, see below */
uint32_t id; /* for SELECT FROM */
int period;
int offset;
};
/* target status */
#define TARST_PROBING 0 /* target is being probed */
#define TARST_ASYNC 1 /* target needs sync/wide negotiation */
#define TARST_WIDE_NEG 2 /* target is doing wide negotiation */
#define TARST_SYNC_NEG 3 /* target is doing sync negotiation */
#define TARST_PPR_NEG 4 /* target is doing sync negotiation */
#define TARST_OK 5 /* sync/wide agreement is valid */
/* target flags */
#define TARF_SYNC 0x01 /* target can do sync */
#define TARF_WIDE 0x02 /* target can do wide */
#define TARF_TAG 0x04 /* target can do tags */
#define TARF_DT 0x08 /* target can do DT clocking */
#define TARF_ISWIDE 0x10 /* target is wide */
#define TARF_ISDT 0x20 /* target is doing DT clocking */
/* Driver internal state */
struct siop_common_softc {
device_t sc_dev;
struct scsipi_channel sc_chan;
struct scsipi_adapter sc_adapt;
int features; /* chip's features */
int ram_size;
int maxburst;
int maxoff;
int clock_div; /* async. clock divider (scntl3) */
int clock_period; /* clock period (ns * 10) */
int st_minsync; /* min and max sync period, */
int dt_minsync;
int st_maxsync; /* as sent in or PPR messages */
int dt_maxsync;
int mode; /* current SE/LVD/HVD mode */
bus_space_tag_t sc_rt; /* bus_space registers tag */
bus_space_handle_t sc_rh; /* bus_space registers handle */
bus_addr_t sc_raddr; /* register addresses */
bus_space_tag_t sc_ramt; /* bus_space ram tag */
bus_space_handle_t sc_ramh; /* bus_space ram handle */
bus_dma_tag_t sc_dmat; /* bus DMA tag */
void (*sc_reset)(struct siop_common_softc*); /* reset callback */
bus_dmamap_t sc_scriptdma; /* DMA map for script */
bus_addr_t sc_scriptaddr; /* on-board ram or physical address */
uint32_t *sc_script; /* script location in memory */
struct siop_common_target *targets[16]; /* per-target states */
};
/* features */
#define SF_BUS_WIDE 0x00000001 /* wide bus */
#define SF_BUS_ULTRA 0x00000002 /* Ultra (20MHz) bus */
#define SF_BUS_ULTRA2 0x00000004 /* Ultra2 (40MHz) bus */
#define SF_BUS_ULTRA3 0x00000008 /* Ultra3 (80MHz) bus */
#define SF_BUS_DIFF 0x00000010 /* differential bus */
