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/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: scsi_comm.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 10/90
*
* Middle layer of the SCSI driver: SCSI protocol implementation
*
* This file contains code for SCSI commands for COMMUNICATION devices.
*/
#include <mach/std_types.h>
#include <scsi/compat_30.h>
#include <scsi/scsi.h>
#include <scsi/scsi_defs.h>
#if (NSCSI > 0)
char *sccomm_name(
boolean_t internal)
{
return internal ? "cz" : "comm";
}
void scsi_get_message(
register target_info_t *tgt,
io_req_t ior)
{
scsi_cmd_read_t *cmd;
register unsigned len, max;
max = scsi_softc[(unsigned char)tgt->masterno]->max_dma_data;
len = ior->io_count;
if (len > max) {
ior->io_residual = len - max;
len = max;
}
cmd = (scsi_cmd_read_t*) (tgt->cmd_ptr);
cmd->scsi_cmd_code = SCSI_CMD_GET_MESSAGE;
cmd->scsi_cmd_lun_and_lba1 = tgt->lun << SCSI_LUN_SHIFT;
cmd->scsi_cmd_lba2 = len >> 16;
cmd->scsi_cmd_lba3 = len >> 8;
cmd->scsi_cmd_xfer_len = len;
cmd->scsi_cmd_ctrl_byte = 0; /* not linked */
tgt->cur_cmd = SCSI_CMD_GET_MESSAGE;
scsi_go(tgt, sizeof(*cmd), len, FALSE);
}
void scsi_send_message(
register target_info_t *tgt,
io_req_t ior)
{
scsi_cmd_write_t *cmd;
register unsigned len, max;
len = ior->io_count;
max = scsi_softc[(unsigned char)tgt->masterno]->max_dma_data;
if (len > max) {
ior->io_residual = len - max;
len = max;
}
cmd = (scsi_cmd_write_t*) (tgt->cmd_ptr);
cmd->scsi_cmd_code = SCSI_CMD_SEND_MESSAGE;
cmd->scsi_cmd_lun_and_lba1 = tgt->lun << SCSI_LUN_SHIFT;
cmd->scsi_cmd_lba2 = len >> 16;
cmd->scsi_cmd_lba3 = len >> 8;
cmd->scsi_cmd_xfer_len = len;
cmd->scsi_cmd_ctrl_byte = 0; /* not linked */
tgt->cur_cmd = SCSI_CMD_SEND_MESSAGE;
scsi_go(tgt, sizeof(*cmd), 0, FALSE);
}
#if 0
/* For now, these are not needed */
scsi_get_message_long
scsi_get_message_vlong
scsi_send_message_long
scsi_send_message_vlong
#endif
#endif /* NSCSI > 0 */
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