374f865285
connected during boot and the vpo module is in the kernel/loaded. In the case where the module is loaded at some later stage with kldload, the CAM bus is now rescanned as well.
467 lines
11 KiB
C
467 lines
11 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999 Nicolas Souchu
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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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/devicestat.h> /* for struct devstat */
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#include <machine/clock.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/cam_debug.h>
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#include <cam/cam_periph.h>
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#include <cam/scsi/scsi_all.h>
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#include <cam/scsi/scsi_message.h>
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#include <cam/scsi/scsi_da.h>
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#include <sys/kernel.h>
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#include "opt_vpo.h"
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/vpoio.h>
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#include "ppbus_if.h"
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struct vpo_sense {
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struct scsi_sense cmd;
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unsigned int stat;
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unsigned int count;
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};
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struct vpo_data {
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unsigned short vpo_unit;
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int vpo_stat;
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int vpo_count;
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int vpo_error;
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int vpo_isplus;
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struct cam_sim *sim;
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struct vpo_sense vpo_sense;
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struct vpoio_data vpo_io; /* interface to low level functions */
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};
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#define DEVTOSOFTC(dev) \
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((struct vpo_data *)device_get_softc(dev))
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/* cam related functions */
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static void vpo_action(struct cam_sim *sim, union ccb *ccb);
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static void vpo_poll(struct cam_sim *sim);
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static void vpo_cam_rescan_callback(struct cam_periph *periph,
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union ccb *ccb);
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static void vpo_cam_rescan(struct vpo_data *vpo);
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static void
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vpo_identify(driver_t *driver, device_t parent)
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{
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BUS_ADD_CHILD(parent, 0, "vpo", 0);
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}
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/*
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* vpo_probe()
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*/
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static int
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vpo_probe(device_t dev)
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{
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struct vpo_data *vpo;
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int error;
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vpo = DEVTOSOFTC(dev);
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bzero(vpo, sizeof(struct vpo_data));
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/* vpo dependent initialisation */
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vpo->vpo_unit = device_get_unit(dev);
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/* low level probe */
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vpoio_set_unit(&vpo->vpo_io, vpo->vpo_unit);
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/* check ZIP before ZIP+ or imm_probe() will send controls to
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* the printer or whatelse connected to the port */
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if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
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vpo->vpo_isplus = 0;
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device_set_desc(dev,
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"Iomega VPI0 Parallel to SCSI interface");
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} else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
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vpo->vpo_isplus = 1;
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device_set_desc(dev,
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"Iomega Matchmaker Parallel to SCSI interface");
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} else {
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return (error);
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}
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return (0);
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}
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/*
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* vpo_attach()
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*/
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static int
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vpo_attach(device_t dev)
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{
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struct vpo_data *vpo = DEVTOSOFTC(dev);
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struct cam_devq *devq;
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int error;
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/* low level attachment */
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if (vpo->vpo_isplus) {
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if ((error = imm_attach(&vpo->vpo_io)))
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return (error);
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} else {
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if ((error = vpoio_attach(&vpo->vpo_io)))
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return (error);
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}
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/*
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** Now tell the generic SCSI layer
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** about our bus.
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*/
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devq = cam_simq_alloc(/*maxopenings*/1);
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/* XXX What about low-level detach on error? */
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if (devq == NULL)
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return (ENXIO);
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vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
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device_get_unit(dev),
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/*untagged*/1, /*tagged*/0, devq);
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if (vpo->sim == NULL) {
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cam_simq_free(devq);
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return (ENXIO);
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}
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if (xpt_bus_register(vpo->sim, /*bus*/0) != CAM_SUCCESS) {
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cam_sim_free(vpo->sim, /*free_devq*/TRUE);
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return (ENXIO);
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}
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/* all went ok */
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vpo_cam_rescan(vpo); /* have CAM rescan the bus */
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return (0);
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}
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static void
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vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
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{
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free(ccb, M_TEMP);
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}
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static void
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vpo_cam_rescan(struct vpo_data *vpo)
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{
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struct cam_path *path;
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union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK);
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bzero(ccb, sizeof(union ccb));
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if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
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!= CAM_REQ_CMP) {
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/* A failure is benign as the user can do a manual rescan */
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return;
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}
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xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
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ccb->ccb_h.func_code = XPT_SCAN_BUS;
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ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
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ccb->crcn.flags = CAM_FLAG_NONE;
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xpt_action(ccb);
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/* The scan is in progress now. */
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}
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/*
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* vpo_intr()
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*/
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static void
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vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
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{
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int errno; /* error in errno.h */
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int s;
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#ifdef VP0_DEBUG
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int i;
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#endif
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s = splcam();
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if (vpo->vpo_isplus) {
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errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
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csio->ccb_h.target_id,
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(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
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(char *)csio->data_ptr, csio->dxfer_len,
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&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
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} else {
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errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
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csio->ccb_h.target_id,
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(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
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(char *)csio->data_ptr, csio->dxfer_len,
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&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
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}
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#ifdef VP0_DEBUG
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printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
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errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
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/* dump of command */
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for (i=0; i<csio->cdb_len; i++)
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printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
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printf("\n");
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#endif
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if (errno) {
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/* connection to ppbus interrupted */
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csio->ccb_h.status = CAM_CMD_TIMEOUT;
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goto error;
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}
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/* if a timeout occured, no sense */
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if (vpo->vpo_error) {
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if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
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printf("vpo%d: VP0 error/timeout (%d)\n",
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vpo->vpo_unit, vpo->vpo_error);
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csio->ccb_h.status = CAM_CMD_TIMEOUT;
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goto error;
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}
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/* check scsi status */
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if (vpo->vpo_stat != SCSI_STATUS_OK) {
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csio->scsi_status = vpo->vpo_stat;
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/* check if we have to sense the drive */
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if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
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vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
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vpo->vpo_sense.cmd.length = csio->sense_len;
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vpo->vpo_sense.cmd.control = 0;
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if (vpo->vpo_isplus) {
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errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
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csio->ccb_h.target_id,
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(char *)&vpo->vpo_sense.cmd,
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sizeof(vpo->vpo_sense.cmd),
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(char *)&csio->sense_data, csio->sense_len,
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&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
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&vpo->vpo_error);
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} else {
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errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
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csio->ccb_h.target_id,
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(char *)&vpo->vpo_sense.cmd,
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sizeof(vpo->vpo_sense.cmd),
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(char *)&csio->sense_data, csio->sense_len,
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&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
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&vpo->vpo_error);
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}
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#ifdef VP0_DEBUG
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printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
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errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
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#endif
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/* check sense return status */
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if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
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/* sense ok */
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csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
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csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
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#ifdef VP0_DEBUG
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/* dump of sense info */
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printf("(sense) ");
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for (i=0; i<vpo->vpo_sense.count; i++)
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printf("%x ", ((char *)&csio->sense_data)[i]);
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printf("\n");
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#endif
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} else {
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/* sense failed */
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csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
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}
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} else {
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/* no sense */
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csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
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}
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goto error;
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}
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csio->resid = csio->dxfer_len - vpo->vpo_count;
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csio->ccb_h.status = CAM_REQ_CMP;
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error:
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splx(s);
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return;
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}
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static void
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vpo_action(struct cam_sim *sim, union ccb *ccb)
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{
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struct vpo_data *vpo = (struct vpo_data *)sim->softc;
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switch (ccb->ccb_h.func_code) {
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case XPT_SCSI_IO:
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{
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struct ccb_scsiio *csio;
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csio = &ccb->csio;
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#ifdef VP0_DEBUG
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printf("vpo%d: XPT_SCSI_IO (0x%x) request\n",
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vpo->vpo_unit, csio->cdb_io.cdb_bytes[0]);
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#endif
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vpo_intr(vpo, csio);
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xpt_done(ccb);
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break;
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}
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case XPT_CALC_GEOMETRY:
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{
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struct ccb_calc_geometry *ccg;
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ccg = &ccb->ccg;
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#ifdef VP0_DEBUG
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printf("vpo%d: XPT_CALC_GEOMETRY (bs=%d,vs=%d,c=%d,h=%d,spt=%d) request\n",
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vpo->vpo_unit,
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ccg->block_size,
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ccg->volume_size,
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ccg->cylinders,
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ccg->heads,
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ccg->secs_per_track);
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#endif
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ccg->heads = 64;
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ccg->secs_per_track = 32;
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ccg->cylinders = ccg->volume_size /
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(ccg->heads * ccg->secs_per_track);
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ccb->ccb_h.status = CAM_REQ_CMP;
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xpt_done(ccb);
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break;
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}
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case XPT_RESET_BUS: /* Reset the specified SCSI bus */
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{
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#ifdef VP0_DEBUG
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printf("vpo%d: XPT_RESET_BUS request\n", vpo->vpo_unit);
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#endif
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if (vpo->vpo_isplus) {
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if (imm_reset_bus(&vpo->vpo_io)) {
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ccb->ccb_h.status = CAM_REQ_CMP_ERR;
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xpt_done(ccb);
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return;
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}
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} else {
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if (vpoio_reset_bus(&vpo->vpo_io)) {
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ccb->ccb_h.status = CAM_REQ_CMP_ERR;
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xpt_done(ccb);
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return;
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}
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}
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ccb->ccb_h.status = CAM_REQ_CMP;
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xpt_done(ccb);
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break;
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}
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case XPT_PATH_INQ: /* Path routing inquiry */
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{
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struct ccb_pathinq *cpi = &ccb->cpi;
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#ifdef VP0_DEBUG
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printf("vpo%d: XPT_PATH_INQ request\n", vpo->vpo_unit);
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#endif
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cpi->version_num = 1; /* XXX??? */
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cpi->hba_inquiry = 0;
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cpi->target_sprt = 0;
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cpi->hba_misc = 0;
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cpi->hba_eng_cnt = 0;
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cpi->max_target = 7;
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cpi->max_lun = 0;
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cpi->initiator_id = VP0_INITIATOR;
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cpi->bus_id = sim->bus_id;
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cpi->base_transfer_speed = 93;
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strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
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strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
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strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
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cpi->unit_number = sim->unit_number;
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cpi->ccb_h.status = CAM_REQ_CMP;
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xpt_done(ccb);
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break;
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}
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default:
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ccb->ccb_h.status = CAM_REQ_INVALID;
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xpt_done(ccb);
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break;
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}
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return;
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}
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static void
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vpo_poll(struct cam_sim *sim)
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{
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/* The ZIP is actually always polled throw vpo_action() */
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return;
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}
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static devclass_t vpo_devclass;
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static device_method_t vpo_methods[] = {
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/* device interface */
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DEVMETHOD(device_identify, vpo_identify),
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DEVMETHOD(device_probe, vpo_probe),
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DEVMETHOD(device_attach, vpo_attach),
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{ 0, 0 }
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};
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static driver_t vpo_driver = {
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"vpo",
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vpo_methods,
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sizeof(struct vpo_data),
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};
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DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);
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