87794d6837
reported on freebsd-current [1]. Also dequeue all events in aac_release_command (instead of just one) so that there's no risk of them getting stranded. Reported by: Steven Brown [1] Submitted by: scottl@ [1] http://lists.freebsd.org/pipermail/freebsd-current/2007-October/077928.html
610 lines
15 KiB
C
610 lines
15 KiB
C
/*-
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* Copyright (c) 2002 Adaptec, Inc.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* CAM front-end for communicating with non-DASD devices
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*/
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#include "opt_aac.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/malloc.h>
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#include <sys/module.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_debug.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/scsi/scsi_all.h>
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#include <cam/scsi/scsi_message.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/disk.h>
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#include <machine/md_var.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/aac/aacreg.h>
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#include <sys/aac_ioctl.h>
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#include <dev/aac/aacvar.h>
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struct aac_cam {
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device_t dev;
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struct aac_sim *inf;
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struct cam_sim *sim;
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struct cam_path *path;
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};
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static int aac_cam_probe(device_t dev);
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static int aac_cam_attach(device_t dev);
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static int aac_cam_detach(device_t dev);
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static void aac_cam_action(struct cam_sim *, union ccb *);
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static void aac_cam_poll(struct cam_sim *);
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static void aac_cam_complete(struct aac_command *);
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static u_int32_t aac_cam_reset_bus(struct cam_sim *, union ccb *);
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static u_int32_t aac_cam_abort_ccb(struct cam_sim *, union ccb *);
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static u_int32_t aac_cam_term_io(struct cam_sim *, union ccb *);
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static devclass_t aac_pass_devclass;
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static device_method_t aac_pass_methods[] = {
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DEVMETHOD(device_probe, aac_cam_probe),
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DEVMETHOD(device_attach, aac_cam_attach),
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DEVMETHOD(device_detach, aac_cam_detach),
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{ 0, 0 }
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};
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static driver_t aac_pass_driver = {
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"aacp",
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aac_pass_methods,
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sizeof(struct aac_cam)
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};
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DRIVER_MODULE(aacp, aac, aac_pass_driver, aac_pass_devclass, 0, 0);
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MODULE_DEPEND(aacp, cam, 1, 1, 1);
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MALLOC_DEFINE(M_AACCAM, "aaccam", "AAC CAM info");
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static void
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aac_cam_event(struct aac_softc *sc, struct aac_event *event, void *arg)
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{
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union ccb *ccb;
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struct aac_cam *camsc;
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switch (event->ev_type) {
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case AAC_EVENT_CMFREE:
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ccb = arg;
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camsc = ccb->ccb_h.sim_priv.entries[0].ptr;
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free(event, M_AACCAM);
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xpt_release_simq(camsc->sim, 1);
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ccb->ccb_h.status = CAM_REQUEUE_REQ;
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xpt_done(ccb);
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break;
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default:
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device_printf(sc->aac_dev, "unknown event %d in aac_cam\n",
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event->ev_type);
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break;
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}
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return;
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}
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static int
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aac_cam_probe(device_t dev)
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{
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debug_called(2);
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return (0);
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}
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static int
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aac_cam_detach(device_t dev)
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{
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struct aac_softc *sc;
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struct aac_cam *camsc;
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debug_called(2);
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camsc = (struct aac_cam *)device_get_softc(dev);
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sc = camsc->inf->aac_sc;
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mtx_lock(&sc->aac_io_lock);
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xpt_async(AC_LOST_DEVICE, camsc->path, NULL);
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xpt_free_path(camsc->path);
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xpt_bus_deregister(cam_sim_path(camsc->sim));
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cam_sim_free(camsc->sim, /*free_devq*/TRUE);
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mtx_unlock(&sc->aac_io_lock);
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return (0);
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}
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/*
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* Register the driver as a CAM SIM
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*/
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static int
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aac_cam_attach(device_t dev)
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{
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struct cam_devq *devq;
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struct cam_sim *sim;
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struct cam_path *path;
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struct aac_cam *camsc;
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struct aac_sim *inf;
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debug_called(1);
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camsc = (struct aac_cam *)device_get_softc(dev);
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inf = (struct aac_sim *)device_get_ivars(dev);
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camsc->inf = inf;
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devq = cam_simq_alloc(inf->TargetsPerBus);
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if (devq == NULL)
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return (EIO);
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sim = cam_sim_alloc(aac_cam_action, aac_cam_poll, "aacp", camsc,
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device_get_unit(dev), &inf->aac_sc->aac_io_lock, 1, 1, devq);
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if (sim == NULL) {
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cam_simq_free(devq);
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return (EIO);
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}
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/* Since every bus has it's own sim, every bus 'appears' as bus 0 */
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mtx_lock(&inf->aac_sc->aac_io_lock);
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if (xpt_bus_register(sim, dev, 0) != CAM_SUCCESS) {
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cam_sim_free(sim, TRUE);
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mtx_unlock(&inf->aac_sc->aac_io_lock);
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return (EIO);
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}
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if (xpt_create_path(&path, NULL, cam_sim_path(sim),
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CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
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xpt_bus_deregister(cam_sim_path(sim));
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cam_sim_free(sim, TRUE);
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mtx_unlock(&inf->aac_sc->aac_io_lock);
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return (EIO);
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}
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mtx_unlock(&inf->aac_sc->aac_io_lock);
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camsc->sim = sim;
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camsc->path = path;
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return (0);
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}
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static void
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aac_cam_action(struct cam_sim *sim, union ccb *ccb)
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{
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struct aac_cam *camsc;
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struct aac_softc *sc;
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struct aac_srb32 *srb;
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struct aac_fib *fib;
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struct aac_command *cm;
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debug_called(2);
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camsc = (struct aac_cam *)cam_sim_softc(sim);
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sc = camsc->inf->aac_sc;
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/* Synchronous ops, and ops that don't require communication with the
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* controller */
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switch(ccb->ccb_h.func_code) {
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case XPT_SCSI_IO:
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case XPT_RESET_DEV:
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/* These are handled down below */
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break;
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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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u_int32_t size_mb;
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u_int32_t secs_per_cylinder;
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ccg = &ccb->ccg;
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size_mb = ccg->volume_size /
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((1024L * 1024L) / ccg->block_size);
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if (size_mb >= (2 * 1024)) { /* 2GB */
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ccg->heads = 255;
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ccg->secs_per_track = 63;
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} else if (size_mb >= (1 * 1024)) { /* 1GB */
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ccg->heads = 128;
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ccg->secs_per_track = 32;
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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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xpt_done(ccb);
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return;
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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;
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cpi->hba_inquiry = PI_WIDE_16;
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cpi->target_sprt = 0;
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/* Resetting via the passthrough causes problems. */
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cpi->hba_misc = PIM_NOBUSRESET;
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cpi->hba_eng_cnt = 0;
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cpi->max_target = camsc->inf->TargetsPerBus;
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cpi->max_lun = 8; /* Per the controller spec */
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cpi->initiator_id = camsc->inf->InitiatorBusId;
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cpi->bus_id = camsc->inf->BusNumber;
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cpi->base_transfer_speed = 3300;
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strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
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strncpy(cpi->hba_vid, "Adaptec", 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->transport = XPORT_SPI;
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cpi->transport_version = 2;
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cpi->protocol = PROTO_SCSI;
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cpi->protocol_version = SCSI_REV_2;
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ccb->ccb_h.status = CAM_REQ_CMP;
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xpt_done(ccb);
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return;
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}
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case XPT_GET_TRAN_SETTINGS:
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{
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struct ccb_trans_settings_scsi *scsi =
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&ccb->cts.proto_specific.scsi;
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struct ccb_trans_settings_spi *spi =
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&ccb->cts.xport_specific.spi;
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ccb->cts.protocol = PROTO_SCSI;
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ccb->cts.protocol_version = SCSI_REV_2;
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ccb->cts.transport = XPORT_SPI;
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ccb->cts.transport_version = 2;
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if (ccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
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scsi->valid = CTS_SCSI_VALID_TQ;
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spi->valid |= CTS_SPI_VALID_DISC;
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} else {
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scsi->valid = 0;
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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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return;
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}
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case XPT_SET_TRAN_SETTINGS:
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ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
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xpt_done(ccb);
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return;
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case XPT_RESET_BUS:
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if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) {
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ccb->ccb_h.status = aac_cam_reset_bus(sim, ccb);
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} else {
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ccb->ccb_h.status = CAM_REQ_CMP;
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}
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xpt_done(ccb);
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return;
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case XPT_ABORT:
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ccb->ccb_h.status = aac_cam_abort_ccb(sim, ccb);
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xpt_done(ccb);
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return;
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case XPT_TERM_IO:
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ccb->ccb_h.status = aac_cam_term_io(sim, ccb);
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xpt_done(ccb);
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return;
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default:
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device_printf(sc->aac_dev, "Unsupported command 0x%x\n",
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ccb->ccb_h.func_code);
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ccb->ccb_h.status = CAM_PROVIDE_FAIL;
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xpt_done(ccb);
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return;
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}
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/* Async ops that require communcation with the controller */
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if (aac_alloc_command(sc, &cm)) {
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struct aac_event *event;
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xpt_freeze_simq(sim, 1);
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ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
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ccb->ccb_h.sim_priv.entries[0].ptr = camsc;
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event = malloc(sizeof(struct aac_event), M_AACCAM,
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M_NOWAIT | M_ZERO);
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if (event == NULL) {
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device_printf(sc->aac_dev,
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"Warning, out of memory for event\n");
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return;
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}
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event->ev_callback = aac_cam_event;
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event->ev_arg = ccb;
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event->ev_type = AAC_EVENT_CMFREE;
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aac_add_event(sc, event);
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return;
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}
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fib = cm->cm_fib;
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srb = (struct aac_srb32 *)&fib->data[0];
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cm->cm_datalen = 0;
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switch (ccb->ccb_h.flags & CAM_DIR_MASK) {
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case CAM_DIR_IN:
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srb->flags = AAC_SRB_FLAGS_DATA_IN;
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cm->cm_flags |= AAC_CMD_DATAIN;
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break;
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case CAM_DIR_OUT:
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srb->flags = AAC_SRB_FLAGS_DATA_OUT;
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cm->cm_flags |= AAC_CMD_DATAOUT;
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break;
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case CAM_DIR_NONE:
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srb->flags = AAC_SRB_FLAGS_NO_DATA_XFER;
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break;
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default:
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srb->flags = AAC_SRB_FLAGS_UNSPECIFIED_DIRECTION;
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cm->cm_flags |= AAC_CMD_DATAIN | AAC_CMD_DATAOUT;
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break;
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}
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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 = &ccb->csio;
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srb->function = AAC_SRB_FUNC_EXECUTE_SCSI;
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/*
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* Copy the CDB into the SRB. It's only 6-16 bytes,
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* so a copy is not too expensive.
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*/
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srb->cdb_len = csio->cdb_len;
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if (ccb->ccb_h.flags & CAM_CDB_POINTER)
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bcopy(csio->cdb_io.cdb_ptr, (u_int8_t *)&srb->cdb[0],
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srb->cdb_len);
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else
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bcopy(csio->cdb_io.cdb_bytes, (u_int8_t *)&srb->cdb[0],
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srb->cdb_len);
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/* Map the s/g list. XXX 32bit addresses only! */
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if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
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if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
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srb->data_len = csio->dxfer_len;
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if (ccb->ccb_h.flags & CAM_DATA_PHYS) {
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/*
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* XXX This isn't 64-bit clean.
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* However, this condition is not
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* normally used in CAM.
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*/
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srb->sg_map32.SgCount = 1;
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srb->sg_map32.SgEntry[0].SgAddress =
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(uint32_t)(uintptr_t)csio->data_ptr;
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srb->sg_map32.SgEntry[0].SgByteCount =
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csio->dxfer_len;
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} else {
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/*
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* Arrange things so that the S/G
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* map will get set up automagically
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*/
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cm->cm_data = (void *)csio->data_ptr;
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cm->cm_datalen = csio->dxfer_len;
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cm->cm_sgtable = &srb->sg_map32;
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}
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} else {
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/* XXX Need to handle multiple s/g elements */
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panic("aac_cam: multiple s/g elements");
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}
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} else {
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srb->sg_map32.SgCount = 0;
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srb->sg_map32.SgEntry[0].SgByteCount = 0;
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srb->data_len = 0;
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}
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break;
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}
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case XPT_RESET_DEV:
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if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) {
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srb->function = AAC_SRB_FUNC_RESET_DEVICE;
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break;
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} else {
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ccb->ccb_h.status = CAM_REQ_CMP;
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xpt_done(ccb);
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return;
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}
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default:
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break;
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}
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srb->bus = camsc->inf->BusNumber; /* Bus number relative to the card */
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srb->target = ccb->ccb_h.target_id;
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srb->lun = ccb->ccb_h.target_lun;
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srb->timeout = ccb->ccb_h.timeout; /* XXX */
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srb->retry_limit = 0;
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cm->cm_complete = aac_cam_complete;
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cm->cm_private = ccb;
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cm->cm_timestamp = time_uptime;
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cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
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fib->Header.XferState =
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AAC_FIBSTATE_HOSTOWNED |
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AAC_FIBSTATE_INITIALISED |
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AAC_FIBSTATE_FROMHOST |
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AAC_FIBSTATE_REXPECTED |
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AAC_FIBSTATE_NORM;
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fib->Header.Command = ScsiPortCommand;
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fib->Header.Size = sizeof(struct aac_fib_header) +
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sizeof(struct aac_srb32);
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aac_enqueue_ready(cm);
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aac_startio(cm->cm_sc);
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return;
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}
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static void
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aac_cam_poll(struct cam_sim *sim)
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{
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/*
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* Pinging the interrupt routine isn't very safe, nor is it
|
|
* really necessary. Do nothing.
|
|
*/
|
|
}
|
|
|
|
static void
|
|
aac_cam_complete(struct aac_command *cm)
|
|
{
|
|
union ccb *ccb;
|
|
struct aac_srb_response *srbr;
|
|
struct aac_softc *sc;
|
|
|
|
debug_called(2);
|
|
|
|
sc = cm->cm_sc;
|
|
ccb = cm->cm_private;
|
|
srbr = (struct aac_srb_response *)&cm->cm_fib->data[0];
|
|
|
|
if (srbr->fib_status != 0) {
|
|
device_printf(sc->aac_dev, "Passthru FIB failed!\n");
|
|
ccb->ccb_h.status = CAM_REQ_ABORTED;
|
|
} else {
|
|
/*
|
|
* The SRB error codes just happen to match the CAM error
|
|
* codes. How convienient!
|
|
*/
|
|
ccb->ccb_h.status = srbr->srb_status;
|
|
|
|
/* Take care of SCSI_IO ops. */
|
|
if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
|
|
u_int8_t command, device;
|
|
|
|
ccb->csio.scsi_status = srbr->scsi_status;
|
|
|
|
/* Take care of autosense */
|
|
if (srbr->sense_len) {
|
|
int sense_len, scsi_sense_len;
|
|
|
|
scsi_sense_len = sizeof(struct scsi_sense_data);
|
|
bzero(&ccb->csio.sense_data, scsi_sense_len);
|
|
sense_len = (srbr->sense_len >
|
|
scsi_sense_len) ? scsi_sense_len :
|
|
srbr->sense_len;
|
|
bcopy(&srbr->sense[0], &ccb->csio.sense_data,
|
|
srbr->sense_len);
|
|
ccb->csio.sense_len = sense_len;
|
|
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
|
|
// scsi_sense_print(&ccb->csio);
|
|
}
|
|
|
|
/* If this is an inquiry command, fake things out */
|
|
if (ccb->ccb_h.flags & CAM_CDB_POINTER)
|
|
command = ccb->csio.cdb_io.cdb_ptr[0];
|
|
else
|
|
command = ccb->csio.cdb_io.cdb_bytes[0];
|
|
|
|
if ((command == INQUIRY) &&
|
|
(ccb->ccb_h.status == CAM_REQ_CMP)) {
|
|
device = ccb->csio.data_ptr[0] & 0x1f;
|
|
/*
|
|
* We want DASD and PROC devices to only be
|
|
* visible through the pass device.
|
|
*/
|
|
if ((device == T_DIRECT) ||
|
|
(device == T_PROCESSOR) ||
|
|
(sc->flags & AAC_FLAGS_CAM_PASSONLY))
|
|
ccb->csio.data_ptr[0] =
|
|
((device & 0xe0) | T_NODEVICE);
|
|
}
|
|
}
|
|
}
|
|
|
|
aac_release_command(cm);
|
|
xpt_done(ccb);
|
|
|
|
return;
|
|
}
|
|
|
|
static u_int32_t
|
|
aac_cam_reset_bus(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
struct aac_fib *fib;
|
|
struct aac_softc *sc;
|
|
struct aac_cam *camsc;
|
|
struct aac_vmioctl *vmi;
|
|
struct aac_resetbus *rbc;
|
|
int e;
|
|
|
|
camsc = (struct aac_cam *)cam_sim_softc(sim);
|
|
sc = camsc->inf->aac_sc;
|
|
|
|
if (sc == NULL) {
|
|
printf("Null sc?\n");
|
|
return (CAM_REQ_ABORTED);
|
|
}
|
|
|
|
aac_alloc_sync_fib(sc, &fib);
|
|
|
|
vmi = (struct aac_vmioctl *)&fib->data[0];
|
|
bzero(vmi, sizeof(struct aac_vmioctl));
|
|
|
|
vmi->Command = VM_Ioctl;
|
|
vmi->ObjType = FT_DRIVE;
|
|
vmi->MethId = sc->scsi_method_id;
|
|
vmi->ObjId = 0;
|
|
vmi->IoctlCmd = ResetBus;
|
|
|
|
rbc = (struct aac_resetbus *)&vmi->IoctlBuf[0];
|
|
rbc->BusNumber = camsc->inf->BusNumber;
|
|
|
|
e = aac_sync_fib(sc, ContainerCommand, 0, fib,
|
|
sizeof(struct aac_vmioctl));
|
|
if (e) {
|
|
device_printf(sc->aac_dev,"Error %d sending ResetBus command\n",
|
|
e);
|
|
aac_release_sync_fib(sc);
|
|
return (CAM_REQ_ABORTED);
|
|
}
|
|
|
|
aac_release_sync_fib(sc);
|
|
return (CAM_REQ_CMP);
|
|
}
|
|
|
|
static u_int32_t
|
|
aac_cam_abort_ccb(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
return (CAM_UA_ABORT);
|
|
}
|
|
|
|
static u_int32_t
|
|
aac_cam_term_io(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
return (CAM_UA_TERMIO);
|
|
}
|
|
|