269 lines
8.9 KiB
C
269 lines
8.9 KiB
C
/* $NetBSD: sfasvar.h,v 1.4 1997/02/11 03:33:46 mark Exp $ */
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/*
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* Copyright (c) 1995 Daniel Widenfalk
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Daniel Widenfalk
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SFASVAR_H_
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#define _SFASVAR_H_
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#ifndef _SFASREG_H_
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#include <arm32/podulebus/sfasreg.h>
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#endif
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/*
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* MAXCHAIN is the anticipated maximum number of chain blocks needed. This
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* assumes that we are NEVER requested to transfer more than MAXPHYS bytes.
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*/
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#define MAXCHAIN (MAXPHYS/NBPG+2)
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/*
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* Maximum number of requests standing by. Could be anything, but I think 9
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* looks nice :-) NOTE: This does NOT include requests already started!
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*/
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#define MAXPENDING 9 /* 7 IDs + 2 extra */
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/*
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* DMA chain block. If flg == SFAS_CHAIN_PRG or flg == SFAS_CHAIN_BUMP then
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* ptr is a VIRTUAL adress. If flg == SFAS_CHAIN_DMA then ptr is a PHYSICAL
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* adress.
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*/
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struct sfas_dma_chain {
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vm_offset_t ptr;
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u_short len;
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short flg;
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};
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#define SFAS_CHAIN_DMA 0x00
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#define SFAS_CHAIN_BUMP 0x01
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#define SFAS_CHAIN_PRG 0x02
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/*
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* This struct contains the necessary info for a pending request. Pointer to
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* a scsi_xfer struct.
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*/
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struct sfas_pending {
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TAILQ_ENTRY(sfas_pending) link;
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struct scsi_xfer *xs;
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};
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/*
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* nexus contains all active data for one SCSI unit. Parts of the info in this
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* struct survives between scsi commands.
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*/
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struct nexus {
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struct scsi_xfer *xs; /* Pointer to request */
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u_char ID; /* ID message to be sent */
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u_char clen; /* scsi command length + */
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u_char cbuf[14]; /* the actual command bytes */
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struct sfas_dma_chain dma[MAXCHAIN]; /* DMA chain blocks */
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short max_link; /* Maximum used of above */
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short cur_link; /* Currently handled block */
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u_char *buf; /* Virtual adress of data */
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int len; /* Bytes left to transfer */
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vm_offset_t dma_buf; /* Current DMA adress */
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int dma_len; /* Current DMA length */
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vm_offset_t dma_blk_ptr; /* Current chain adress */
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int dma_blk_len; /* Current chain length */
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u_char dma_blk_flg; /* Current chain flags */
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u_char state; /* Nexus state, see below */
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u_short flags; /* Nexus flags, see below */
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short period; /* Sync period to request */
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u_char offset; /* Sync offset to request */
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u_char syncper; /* FAS216 variable storage */
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u_char syncoff; /* FAS216 variable storage */
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u_char config3; /* FAS216 variable storage */
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u_char lun_unit; /* (Lun<<4) | Unit of nexus */
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u_char status; /* Status byte from unit*/
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};
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/* SCSI nexus_states */
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#define SFAS_NS_IDLE 0 /* Nexus idle */
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#define SFAS_NS_SELECTED 1 /* Last command was a SELECT command */
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#define SFAS_NS_DATA_IN 2 /* Last command was a TRANSFER_INFO */
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/* command during a data in phase */
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#define SFAS_NS_DATA_OUT 3 /* Last command was a TRANSFER_INFO */
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/* command during a data out phase */
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#define SFAS_NS_STATUS 4 /* We have send a COMMAND_COMPLETE */
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/* command and are awaiting status */
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#define SFAS_NS_MSG_IN 5 /* Last phase was MESSAGE IN */
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#define SFAS_NS_MSG_OUT 6 /* Last phase was MESSAGE OUT */
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#define SFAS_NS_SVC 7 /* We have sent the command */
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#define SFAS_NS_DISCONNECTING 8 /* We have recieved a disconnect msg */
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#define SFAS_NS_DISCONNECTED 9 /* We are disconnected */
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#define SFAS_NS_RESELECTED 10 /* We was reselected */
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#define SFAS_NS_DONE 11 /* Done. Prephsase to FINISHED */
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#define SFAS_NS_FINISHED 12 /* Realy done. Call scsi_done */
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#define SFAS_NS_SENSE 13 /* We are requesting sense */
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#define SFAS_NS_RESET 14 /* We are reseting this unit */
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/* SCSI nexus flags */
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#define SFAS_NF_UNIT_BUSY 0x0001 /* Unit is not available */
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#define SFAS_NF_SELECT_ME 0x0002 /* Nexus is set up, waiting for bus */
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#define SFAS_NF_REQUEST_SENSE 0x0004 /* We should request sense */
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#define SFAS_NF_SENSING 0x0008 /* We are sensing */
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#define SFAS_NF_HAS_MSG 0x0010 /* We have recieved a complete msg */
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#define SFAS_NF_DO_SDTR 0x0020 /* We should send a SDTR */
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#define SFAS_NF_SDTR_SENT 0x0040 /* We have sent a SDTR */
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#define SFAS_NF_SYNC_TESTED 0x0080 /* We have negotiated sync */
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#define SFAS_NF_RESET 0x0100 /* Reset this nexus */
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#define SFAS_NF_IMMEDIATE 0x0200 /* We are operating from sfasicmd */
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#define SFAS_NF_RETRY_SELECT 0x1000 /* Selection needs retrying */
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#define SFAS_NF_DEBUG 0x8000 /* As it says: DEBUG */
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struct sfas_softc {
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struct device sc_dev; /* System required struct */
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struct scsi_link sc_link; /* For sub devices */
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irqhandler_t sc_ih; /* Interrupt chain struct */
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TAILQ_HEAD(,sfas_pending) sc_xs_pending;
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TAILQ_HEAD(,sfas_pending) sc_xs_free;
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struct sfas_pending sc_xs_store[MAXPENDING];
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sfas_regmap_p sc_fas; /* FAS216 Address */
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void *sc_spec; /* Board-specific data */
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u_char *sc_bump_va; /* Bumpbuf virtual adr */
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vm_offset_t sc_bump_pa; /* Bumpbuf physical adr */
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int sc_bump_sz; /* Bumpbuf size */
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/* Configuration registers, must be set BEFORE sfasinitialize */
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u_char sc_clock_freq;
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u_short sc_timeout;
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u_char sc_host_id;
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u_char sc_config_flags;
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/* Generic DMA functions */
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int (*sc_setup_dma)();
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int (*sc_build_dma_chain)();
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int (*sc_need_bump)();
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/* Optional replacement ixfer */
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void (*sc_ixfer)();
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/* Generic Led data */
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int sc_led_status;
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void (*sc_led)();
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/* Nexus list */
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struct nexus sc_nexus[8];
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struct nexus *sc_cur_nexus;
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struct nexus *sc_sel_nexus;
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/* Current transfer data */
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u_char *sc_buf; /* va */
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int sc_len;
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vm_offset_t sc_dma_buf; /* pa */
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int sc_dma_len;
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vm_offset_t sc_dma_blk_ptr;
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int sc_dma_blk_len;
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short sc_dma_blk_flg;
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struct sfas_dma_chain *sc_chain; /* Current DMA chain */
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short sc_max_link;
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short sc_cur_link;
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/* Interrupt registers */
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u_char sc_status;
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u_char sc_interrupt;
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u_char sc_resel[2];
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u_char sc_units_disconnected;
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/* Storage for FAS216 config registers (current values) */
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u_char sc_config1;
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u_char sc_config2;
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u_char sc_config3;
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u_char sc_clock_conv_fact;
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u_char sc_timeout_val;
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u_char sc_clock_period;
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u_char sc_msg_in[7];
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u_char sc_msg_in_len;
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u_char sc_msg_out[7];
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u_char sc_msg_out_len;
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u_char sc_unit;
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u_char sc_lun;
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u_char sc_flags;
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};
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#define SFAS_DMA_READ 0
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#define SFAS_DMA_WRITE 1
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#define SFAS_DMA_CLEAR 2
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/* sc_flags */
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#define SFAS_ACTIVE 0x01
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#define SFAS_DONT_WAIT 0x02
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/* SCSI Selection modes */
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#define SFAS_SELECT 0x00 /* Normal selection: No sync, no resel */
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#define SFAS_SELECT_R 0x01 /* Reselection allowed */
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#define SFAS_SELECT_S 0x02 /* Synchronous transfer allowed */
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#define SFAS_SELECT_I 0x04 /* Selection for sfasicmd */
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#define SFAS_SELECT_K 0x08 /* Send a BUS DEVICE RESET message (Kill) */
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/* Nice abbreviations of the above */
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#define SFAS_SELECT_RS (SFAS_SELECT_R|SFAS_SELECT_S)
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#define SFAS_SELECT_RI (SFAS_SELECT_R|SFAS_SELECT_I)
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#define SFAS_SELECT_SI (SFAS_SELECT_S|SFAS_SELECT_I)
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#define SFAS_SELECT_RSI (SFAS_SELECT_R|SFAS_SELECT_S|SFAS_SELECT_I)
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/* sc_config_flags */
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#define SFAS_NO_SYNCH 0x01 /* Disable synchronous transfer */
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#define SFAS_NO_DMA 0x02 /* Do not use DMA! EVER! */
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#define SFAS_NO_RESELECT 0x04 /* Do not allow relesection */
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#define SFAS_SLOW_CABLE 0x08 /* Cable is "unsafe" for fast scsi-2 */
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#define SFAS_SLOW_START 0x10 /* There are slow starters on the bus */
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void sfasinitialize __P((struct sfas_softc *sc));
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void sfas_minphys __P((struct buf *bp));
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int sfas_scsicmd __P((struct scsi_xfer *));
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void sfasintr __P((struct sfas_softc *dev));
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#endif /* _SFASVAR_H_ */
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