9f1776230d
- New support for 40LD firmware found in Series 475 and 471 adapters. - Better support for 8LD firmware adapters - Ioctl passthrough interface for userland utilities. - Improved error handling and queueing. - Several bugfixes (including the 'still open' shutdown bug and closing some small race conditions). - Zone-style command allocator, reducing memory wasted under heavy load conditions. - CAM interface (disabled and not fully working) for SCSI passthrough access to non-disk devices Thanks to AMI for supplying a pile of new adapters and various other help in making this happen.
453 lines
13 KiB
C
453 lines
13 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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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/malloc.h>
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#include <sys/kernel.h>
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#include <dev/amr/amr_compat.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/devicestat.h>
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#include <sys/disk.h>
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#include <sys/stat.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.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/scsi/scsi_all.h>
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#include <cam/scsi/scsi_message.h>
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#include <machine/resource.h>
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#include <machine/bus.h>
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#include <dev/amr/amrreg.h>
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#include <dev/amr/amrvar.h>
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static void amr_cam_action(struct cam_sim *sim, union ccb *ccb);
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static void amr_cam_poll(struct cam_sim *sim);
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static void amr_cam_complete(struct amr_command *ac);
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/********************************************************************************
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* Enqueue/dequeue functions
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*/
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static __inline void
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amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
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{
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int s;
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s = splbio();
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TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
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splx(s);
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}
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static __inline void
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amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
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{
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int s;
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s = splbio();
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TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
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splx(s);
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}
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static __inline union ccb *
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amr_dequeue_ccb(struct amr_softc *sc)
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{
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union ccb *ccb;
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int s;
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s = splbio();
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if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
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TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
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splx(s);
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return(ccb);
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}
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/********************************************************************************
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* Attach our 'real' SCSI channels to CAM
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*/
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int
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amr_cam_attach(struct amr_softc *sc)
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{
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struct cam_devq *devq;
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int chn;
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/* initialise the ccb queue */
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TAILQ_INIT(&sc->amr_cam_ccbq);
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/*
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* Allocate a devq for all our channels combined. This should
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* allow for the maximum number of SCSI commands we will accept
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* at one time.
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*/
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if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
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return(ENOMEM);
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/*
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* Iterate over our channels, registering them with CAM
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*/
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for (chn = 0; chn < sc->amr_maxchan; chn++) {
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/* allocate a sim */
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if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
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amr_cam_poll,
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"amr",
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sc,
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device_get_unit(sc->amr_dev),
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1,
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AMR_MAX_SCSI_CMDS,
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devq)) == NULL) {
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cam_simq_free(devq);
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device_printf(sc->amr_dev, "CAM SIM attach failed\n");
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return(ENOMEM);
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}
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/* register the bus ID so we can get it later */
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if (xpt_bus_register(sc->amr_cam_sim[chn], chn)) {
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device_printf(sc->amr_dev, "CAM XPT bus registration failed\n");
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return(ENXIO);
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}
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}
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/*
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* XXX we should scan the config and work out which devices are actually
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* protected.
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*/
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return(0);
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}
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/********************************************************************************
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* Disconnect ourselves from CAM
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*/
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void
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amr_cam_detach(struct amr_softc *sc)
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{
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int chn, first;
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for (chn = 0, first = 1; chn < sc->amr_maxchan; chn++) {
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/*
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* If a sim was allocated for this channel, free it
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*/
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if (sc->amr_cam_sim[chn] != NULL) {
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xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
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cam_sim_free(sc->amr_cam_sim[chn], first ? TRUE : FALSE);
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first = 0;
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}
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}
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}
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/********************************************************************************
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********************************************************************************
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CAM passthrough interface
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********************************************************************************
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********************************************************************************/
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/********************************************************************************
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* Handle a request for action from CAM
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*/
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static void
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amr_cam_action(struct cam_sim *sim, union ccb *ccb)
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{
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struct amr_softc *sc = cam_sim_softc(sim);
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switch(ccb->ccb_h.func_code) {
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/*
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* Perform SCSI I/O to a physical device.
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*/
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case XPT_SCSI_IO:
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{
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struct ccb_hdr *ccbh = &ccb->ccb_h;
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struct ccb_scsiio *csio = &ccb->csio;
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/* Validate the CCB */
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ccbh->status = CAM_REQ_INPROG;
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/* check the CDB length */
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if (csio->cdb_len > AMR_MAX_CDB_LEN)
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ccbh->status = CAM_REQ_CMP_ERR;
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/* check that the CDB pointer is not to a physical address */
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if ((ccbh->flags & CAM_CDB_POINTER) && (ccbh->flags & CAM_CDB_PHYS))
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ccbh->status = CAM_REQ_CMP_ERR;
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/* if there is data transfer, it must be to/from a virtual address */
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if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
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if (ccbh->flags & CAM_DATA_PHYS) /* we can't map it */
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ccbh->status = CAM_REQ_CMP_ERR;
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if (ccbh->flags & CAM_SCATTER_VALID) /* we want to do the s/g setup */
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ccbh->status = CAM_REQ_CMP_ERR;
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}
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/*
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* If the command is to a LUN other than 0, fail it.
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* This is probably incorrect, but during testing the firmware did not
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* seem to respect the LUN field, and thus devices appear echoed.
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*/
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if (csio->ccb_h.target_lun != 0)
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ccbh->status = CAM_REQ_CMP_ERR;
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/* if we're happy with the request, queue it for attention */
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if (ccbh->status == CAM_REQ_INPROG) {
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/* save the channel number in the ccb */
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csio->ccb_h.sim_priv.entries[0].field = cam_sim_bus(sim);
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amr_enqueue_ccb(sc, ccb);
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amr_startio(sc);
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return;
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}
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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 = &ccb->ccg;
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u_int32_t size_in_mb;
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u_int32_t secs_per_cylinder;
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size_in_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
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if (size_in_mb > 1024) {
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ccg->heads = 255;
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ccg->secs_per_track = 63;
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} else {
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ccg->heads = 64;
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ccg->secs_per_track = 32;
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}
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secs_per_cylinder = ccg->heads * ccg->secs_per_track;
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ccg->cylinders = ccg->volume_size / secs_per_cylinder;
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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}
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/*
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* Return path stats. Some of these should probably be
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* amended.
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*/
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case XPT_PATH_INQ:
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{
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struct ccb_pathinq *cpi = & ccb->cpi;
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cpi->version_num = 1; /* XXX??? */
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cpi->hba_inquiry = PI_SDTR_ABLE;
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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 = AMR_MAX_TARGETS;
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cpi->max_lun = AMR_MAX_LUNS;
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cpi->initiator_id = 7; /* XXX variable? */
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strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
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strncpy(cpi->hba_vid, "BSDi", HBA_IDLEN);
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strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
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cpi->unit_number = cam_sim_unit(sim);
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cpi->bus_id = cam_sim_bus(sim);
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cpi->base_transfer_speed = 132 * 1024; /* XXX get from controller? */
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cpi->ccb_h.status = CAM_REQ_CMP;
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break;
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}
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/*
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* Reject anything else as unsupported.
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*/
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default:
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/* we can't do this */
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ccb->ccb_h.status = CAM_REQ_INVALID;
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break;
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}
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xpt_done(ccb);
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}
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/********************************************************************************
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* Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI command.
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*/
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int
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amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
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{
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struct amr_command *ac;
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struct amr_passthrough *ap;
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struct ccb_scsiio *csio;
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int bus, target, error;
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error = 0;
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ac = NULL;
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ap = NULL;
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/* check to see if there is a ccb for us to work with */
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if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
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goto out;
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/* get bus/target, XXX validate against protected devices? */
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bus = csio->ccb_h.sim_priv.entries[0].field;
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target = csio->ccb_h.target_id;
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/*
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* Build a passthrough command.
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*/
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/* construct passthrough */
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if ((ap = malloc(sizeof(*ap), M_DEVBUF, M_NOWAIT)) == NULL) {
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error = ENOMEM;
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goto out;
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}
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bzero(ap, sizeof(*ap));
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ap->ap_timeout = 0;
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ap->ap_ars = 1;
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ap->ap_request_sense_length = 14;
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ap->ap_islogical = 0;
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ap->ap_channel = bus;
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ap->ap_scsi_id = target;
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ap->ap_logical_drive_no = csio->ccb_h.target_lun;
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ap->ap_cdb_length = csio->cdb_len;
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if (csio->ccb_h.flags & CAM_CDB_POINTER) {
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bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
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} else {
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bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb, csio->cdb_len);
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}
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/* we leave the data s/g list and s/g count to the map routine later */
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debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0], ap->ap_cdb_length, csio->dxfer_len,
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ap->ap_channel, ap->ap_scsi_id, ap->ap_logical_drive_no);
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/* construct command */
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if ((ac = amr_alloccmd(sc)) == NULL) {
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error = ENOMEM;
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goto out;
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}
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ac->ac_data = ap;
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ac->ac_length = sizeof(*ap);
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ac->ac_flags |= AMR_CMD_DATAOUT;
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ac->ac_ccb_data = csio->data_ptr;
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ac->ac_ccb_length = csio->dxfer_len;
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if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
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ac->ac_flags |= AMR_CMD_CCB_DATAIN;
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if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
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ac->ac_flags |= AMR_CMD_CCB_DATAOUT;
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ac->ac_complete = amr_cam_complete;
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ac->ac_private = csio;
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ac->ac_mailbox.mb_command = AMR_CMD_PASS;
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out:
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if (error != 0) {
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if (ac != NULL)
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amr_releasecmd(ac);
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if (ap != NULL)
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free(ap, M_DEVBUF);
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if (csio != NULL) /* put it back and try again later */
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amr_requeue_ccb(sc, (union ccb *)csio);
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}
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*acp = ac;
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return(error);
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}
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/********************************************************************************
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* Check for interrupt status
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*/
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static void
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amr_cam_poll(struct cam_sim *sim)
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{
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amr_done(cam_sim_softc(sim));
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}
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/********************************************************************************
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* Handle completion of a command submitted via CAM.
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*/
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static void
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amr_cam_complete(struct amr_command *ac)
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{
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struct amr_passthrough *ap = (struct amr_passthrough *)ac->ac_data;
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struct ccb_scsiio *csio = (struct ccb_scsiio *)ac->ac_private;
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struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr;
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/* XXX note that we're ignoring ac->ac_status - good idea? */
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debug(1, "status 0x%x scsi_status 0x%x", ac->ac_status, ap->ap_scsi_status);
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/*
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* Hide disks from CAM so that they're not picked up and treated as 'normal' disks.
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*
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* If the configuration provides a mechanism to mark a disk a "not managed", we
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* could add handling for that to allow disks to be selectively visible.
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*/
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#if 0
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if ((ap->ap_cdb[0] == INQUIRY) && (SID_TYPE(inq) == T_DIRECT)) {
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bzero(csio->data_ptr, csio->dxfer_len);
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if (ap->ap_scsi_status == 0xf0) {
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csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
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} else {
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csio->ccb_h.status = CAM_DEV_NOT_THERE;
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}
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} else {
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#else
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{
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#endif
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/* handle passthrough SCSI status */
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switch(ap->ap_scsi_status) {
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case 0: /* completed OK */
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csio->ccb_h.status = CAM_REQ_CMP;
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break;
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case 0x02:
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csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
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csio->scsi_status = SCSI_STATUS_CHECK_COND;
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bcopy(ap->ap_request_sense_area, &csio->sense_data, AMR_MAX_REQ_SENSE_LEN);
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csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
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csio->ccb_h.status |= CAM_AUTOSNS_VALID;
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break;
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case 0x08:
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csio->ccb_h.status = CAM_SCSI_BUSY;
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break;
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case 0xf0:
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case 0xf4:
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default:
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csio->ccb_h.status = CAM_REQ_CMP_ERR;
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break;
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}
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}
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free(ap, M_DEVBUF);
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if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
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debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr, " ");
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xpt_done((union ccb *)csio);
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amr_releasecmd(ac);
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}
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