7c7ebb01c6
return to user space w/o waiting for I/O to complete. I tried to get several folks who know this code better than me to review it with no luck. I *do* know that w/o this code, using the SCSI target driver panics in userret (if it doesn't panic in knote first).
1759 lines
44 KiB
C
1759 lines
44 KiB
C
/*-
|
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* Common functions for CAM "type" (peripheral) drivers.
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*
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* Copyright (c) 1997, 1998 Justin T. Gibbs.
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* Copyright (c) 1997, 1998, 1999, 2000 Kenneth D. Merry.
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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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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 FOR
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* 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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|
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/types.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/linker_set.h>
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#include <sys/bio.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/devicestat.h>
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#include <sys/bus.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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|
|
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#include <cam/cam.h>
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|
#include <cam/cam_ccb.h>
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#include <cam/cam_xpt_periph.h>
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#include <cam/cam_periph.h>
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#include <cam/cam_debug.h>
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|
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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_pass.h>
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|
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static u_int camperiphnextunit(struct periph_driver *p_drv,
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u_int newunit, int wired,
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path_id_t pathid, target_id_t target,
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lun_id_t lun);
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static u_int camperiphunit(struct periph_driver *p_drv,
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path_id_t pathid, target_id_t target,
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lun_id_t lun);
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static void camperiphdone(struct cam_periph *periph,
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union ccb *done_ccb);
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static void camperiphfree(struct cam_periph *periph);
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static int camperiphscsistatuserror(union ccb *ccb,
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cam_flags camflags,
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u_int32_t sense_flags,
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union ccb *save_ccb,
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int *openings,
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u_int32_t *relsim_flags,
|
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u_int32_t *timeout);
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static int camperiphscsisenseerror(union ccb *ccb,
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cam_flags camflags,
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u_int32_t sense_flags,
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union ccb *save_ccb,
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int *openings,
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u_int32_t *relsim_flags,
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u_int32_t *timeout);
|
|
|
|
static int nperiph_drivers;
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struct periph_driver **periph_drivers;
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|
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MALLOC_DEFINE(M_CAMPERIPH, "CAM periph", "CAM peripheral buffers");
|
|
|
|
void
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periphdriver_register(void *data)
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|
{
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struct periph_driver **newdrivers, **old;
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int ndrivers;
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|
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ndrivers = nperiph_drivers + 2;
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newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_TEMP, M_WAITOK);
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if (periph_drivers)
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bcopy(periph_drivers, newdrivers,
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sizeof(*newdrivers) * nperiph_drivers);
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newdrivers[nperiph_drivers] = (struct periph_driver *)data;
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newdrivers[nperiph_drivers + 1] = NULL;
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old = periph_drivers;
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periph_drivers = newdrivers;
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if (old)
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free(old, M_TEMP);
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nperiph_drivers++;
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}
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|
cam_status
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cam_periph_alloc(periph_ctor_t *periph_ctor,
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periph_oninv_t *periph_oninvalidate,
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periph_dtor_t *periph_dtor, periph_start_t *periph_start,
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char *name, cam_periph_type type, struct cam_path *path,
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ac_callback_t *ac_callback, ac_code code, void *arg)
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{
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struct periph_driver **p_drv;
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struct cam_periph *periph;
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struct cam_periph *cur_periph;
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path_id_t path_id;
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target_id_t target_id;
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lun_id_t lun_id;
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cam_status status;
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u_int init_level;
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int s;
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init_level = 0;
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/*
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* Handle Hot-Plug scenarios. If there is already a peripheral
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* of our type assigned to this path, we are likely waiting for
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* final close on an old, invalidated, peripheral. If this is
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* the case, queue up a deferred call to the peripheral's async
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* handler. If it looks like a mistaken re-allocation, complain.
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*/
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if ((periph = cam_periph_find(path, name)) != NULL) {
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if ((periph->flags & CAM_PERIPH_INVALID) != 0
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&& (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) {
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periph->flags |= CAM_PERIPH_NEW_DEV_FOUND;
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periph->deferred_callback = ac_callback;
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periph->deferred_ac = code;
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return (CAM_REQ_INPROG);
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} else {
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printf("cam_periph_alloc: attempt to re-allocate "
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"valid device %s%d rejected\n",
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periph->periph_name, periph->unit_number);
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}
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return (CAM_REQ_INVALID);
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}
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periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH,
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M_NOWAIT);
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if (periph == NULL)
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return (CAM_RESRC_UNAVAIL);
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init_level++;
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for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
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if (strcmp((*p_drv)->driver_name, name) == 0)
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break;
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}
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path_id = xpt_path_path_id(path);
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target_id = xpt_path_target_id(path);
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lun_id = xpt_path_lun_id(path);
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bzero(periph, sizeof(*periph));
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cam_init_pinfo(&periph->pinfo);
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periph->periph_start = periph_start;
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periph->periph_dtor = periph_dtor;
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periph->periph_oninval = periph_oninvalidate;
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periph->type = type;
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periph->periph_name = name;
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periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id);
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periph->immediate_priority = CAM_PRIORITY_NONE;
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periph->refcount = 0;
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SLIST_INIT(&periph->ccb_list);
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status = xpt_create_path(&path, periph, path_id, target_id, lun_id);
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if (status != CAM_REQ_CMP)
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goto failure;
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periph->path = path;
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init_level++;
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status = xpt_add_periph(periph);
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if (status != CAM_REQ_CMP)
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goto failure;
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s = splsoftcam();
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cur_periph = TAILQ_FIRST(&(*p_drv)->units);
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while (cur_periph != NULL
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&& cur_periph->unit_number < periph->unit_number)
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cur_periph = TAILQ_NEXT(cur_periph, unit_links);
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if (cur_periph != NULL)
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TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links);
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else {
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TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links);
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(*p_drv)->generation++;
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}
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splx(s);
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init_level++;
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status = periph_ctor(periph, arg);
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if (status == CAM_REQ_CMP)
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init_level++;
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failure:
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switch (init_level) {
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case 4:
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/* Initialized successfully */
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break;
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case 3:
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s = splsoftcam();
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TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
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splx(s);
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xpt_remove_periph(periph);
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/* FALLTHROUGH */
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case 2:
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xpt_free_path(periph->path);
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/* FALLTHROUGH */
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case 1:
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free(periph, M_CAMPERIPH);
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/* FALLTHROUGH */
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case 0:
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/* No cleanup to perform. */
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break;
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default:
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panic("cam_periph_alloc: Unkown init level");
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}
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return(status);
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}
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/*
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* Find a peripheral structure with the specified path, target, lun,
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* and (optionally) type. If the name is NULL, this function will return
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* the first peripheral driver that matches the specified path.
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*/
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struct cam_periph *
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cam_periph_find(struct cam_path *path, char *name)
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{
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struct periph_driver **p_drv;
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struct cam_periph *periph;
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int s;
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for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
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if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0))
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continue;
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s = splsoftcam();
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TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
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if (xpt_path_comp(periph->path, path) == 0) {
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splx(s);
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return(periph);
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}
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}
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splx(s);
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if (name != NULL)
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return(NULL);
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}
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return(NULL);
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}
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cam_status
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cam_periph_acquire(struct cam_periph *periph)
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{
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int s;
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if (periph == NULL)
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return(CAM_REQ_CMP_ERR);
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s = splsoftcam();
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periph->refcount++;
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splx(s);
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return(CAM_REQ_CMP);
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}
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void
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cam_periph_release(struct cam_periph *periph)
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{
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int s;
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if (periph == NULL)
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return;
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s = splsoftcam();
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if ((--periph->refcount == 0)
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&& (periph->flags & CAM_PERIPH_INVALID)) {
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camperiphfree(periph);
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}
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splx(s);
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}
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/*
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* Look for the next unit number that is not currently in use for this
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* peripheral type starting at "newunit". Also exclude unit numbers that
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* are reserved by for future "hardwiring" unless we already know that this
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* is a potential wired device. Only assume that the device is "wired" the
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* first time through the loop since after that we'll be looking at unit
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* numbers that did not match a wiring entry.
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*/
|
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static u_int
|
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camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired,
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path_id_t pathid, target_id_t target, lun_id_t lun)
|
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{
|
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struct cam_periph *periph;
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char *periph_name;
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int s;
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int i, val, dunit, r;
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const char *dname, *strval;
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s = splsoftcam();
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periph_name = p_drv->driver_name;
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for (;;newunit++) {
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|
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for (periph = TAILQ_FIRST(&p_drv->units);
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periph != NULL && periph->unit_number != newunit;
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periph = TAILQ_NEXT(periph, unit_links))
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;
|
|
|
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if (periph != NULL && periph->unit_number == newunit) {
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if (wired != 0) {
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xpt_print_path(periph->path);
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printf("Duplicate Wired Device entry!\n");
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|
xpt_print_path(periph->path);
|
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printf("Second device (%s device at scbus%d "
|
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"target %d lun %d) will not be wired\n",
|
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periph_name, pathid, target, lun);
|
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wired = 0;
|
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}
|
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continue;
|
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}
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if (wired)
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break;
|
|
|
|
/*
|
|
* Don't match entries like "da 4" as a wired down
|
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* device, but do match entries like "da 4 target 5"
|
|
* or even "da 4 scbus 1".
|
|
*/
|
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i = 0;
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dname = periph_name;
|
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for (;;) {
|
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r = resource_find_dev(&i, dname, &dunit, NULL, NULL);
|
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if (r != 0)
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break;
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/* if no "target" and no specific scbus, skip */
|
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if (resource_int_value(dname, dunit, "target", &val) &&
|
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(resource_string_value(dname, dunit, "at",&strval)||
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strcmp(strval, "scbus") == 0))
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continue;
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if (newunit == dunit)
|
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break;
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}
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if (r != 0)
|
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break;
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}
|
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splx(s);
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return (newunit);
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}
|
|
|
|
static u_int
|
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camperiphunit(struct periph_driver *p_drv, path_id_t pathid,
|
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target_id_t target, lun_id_t lun)
|
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{
|
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u_int unit;
|
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int wired, i, val, dunit;
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const char *dname, *strval;
|
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char pathbuf[32], *periph_name;
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|
|
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periph_name = p_drv->driver_name;
|
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snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid);
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unit = 0;
|
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i = 0;
|
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dname = periph_name;
|
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for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0;
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wired = 0) {
|
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if (resource_string_value(dname, dunit, "at", &strval) == 0) {
|
|
if (strcmp(strval, pathbuf) != 0)
|
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continue;
|
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wired++;
|
|
}
|
|
if (resource_int_value(dname, dunit, "target", &val) == 0) {
|
|
if (val != target)
|
|
continue;
|
|
wired++;
|
|
}
|
|
if (resource_int_value(dname, dunit, "lun", &val) == 0) {
|
|
if (val != lun)
|
|
continue;
|
|
wired++;
|
|
}
|
|
if (wired != 0) {
|
|
unit = dunit;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Either start from 0 looking for the next unit or from
|
|
* the unit number given in the resource config. This way,
|
|
* if we have wildcard matches, we don't return the same
|
|
* unit number twice.
|
|
*/
|
|
unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun);
|
|
|
|
return (unit);
|
|
}
|
|
|
|
void
|
|
cam_periph_invalidate(struct cam_periph *periph)
|
|
{
|
|
int s;
|
|
|
|
s = splsoftcam();
|
|
/*
|
|
* We only call this routine the first time a peripheral is
|
|
* invalidated. The oninvalidate() routine is always called at
|
|
* splsoftcam().
|
|
*/
|
|
if (((periph->flags & CAM_PERIPH_INVALID) == 0)
|
|
&& (periph->periph_oninval != NULL))
|
|
periph->periph_oninval(periph);
|
|
|
|
periph->flags |= CAM_PERIPH_INVALID;
|
|
periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND;
|
|
|
|
if (periph->refcount == 0)
|
|
camperiphfree(periph);
|
|
else if (periph->refcount < 0)
|
|
printf("cam_invalidate_periph: refcount < 0!!\n");
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
camperiphfree(struct cam_periph *periph)
|
|
{
|
|
int s;
|
|
struct periph_driver **p_drv;
|
|
|
|
for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
|
|
if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0)
|
|
break;
|
|
}
|
|
if (*p_drv == NULL) {
|
|
printf("camperiphfree: attempt to free non-existant periph\n");
|
|
return;
|
|
}
|
|
|
|
if (periph->periph_dtor != NULL)
|
|
periph->periph_dtor(periph);
|
|
|
|
s = splsoftcam();
|
|
TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
|
|
(*p_drv)->generation++;
|
|
splx(s);
|
|
|
|
xpt_remove_periph(periph);
|
|
|
|
if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) {
|
|
union ccb ccb;
|
|
void *arg;
|
|
|
|
switch (periph->deferred_ac) {
|
|
case AC_FOUND_DEVICE:
|
|
ccb.ccb_h.func_code = XPT_GDEV_TYPE;
|
|
xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1);
|
|
xpt_action(&ccb);
|
|
arg = &ccb;
|
|
break;
|
|
case AC_PATH_REGISTERED:
|
|
ccb.ccb_h.func_code = XPT_PATH_INQ;
|
|
xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/ 1);
|
|
xpt_action(&ccb);
|
|
arg = &ccb;
|
|
break;
|
|
default:
|
|
arg = NULL;
|
|
break;
|
|
}
|
|
periph->deferred_callback(NULL, periph->deferred_ac,
|
|
periph->path, arg);
|
|
}
|
|
xpt_free_path(periph->path);
|
|
free(periph, M_CAMPERIPH);
|
|
}
|
|
|
|
/*
|
|
* Wait interruptibly for an exclusive lock.
|
|
*/
|
|
int
|
|
cam_periph_lock(struct cam_periph *periph, int priority)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Increment the reference count on the peripheral
|
|
* while we wait for our lock attempt to succeed
|
|
* to ensure the peripheral doesn't disappear out
|
|
* from under us while we sleep.
|
|
*/
|
|
if (cam_periph_acquire(periph) != CAM_REQ_CMP)
|
|
return(ENXIO);
|
|
|
|
while ((periph->flags & CAM_PERIPH_LOCKED) != 0) {
|
|
periph->flags |= CAM_PERIPH_LOCK_WANTED;
|
|
if ((error = tsleep(periph, priority, "caplck", 0)) != 0) {
|
|
cam_periph_release(periph);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
periph->flags |= CAM_PERIPH_LOCKED;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unlock and wake up any waiters.
|
|
*/
|
|
void
|
|
cam_periph_unlock(struct cam_periph *periph)
|
|
{
|
|
periph->flags &= ~CAM_PERIPH_LOCKED;
|
|
if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) {
|
|
periph->flags &= ~CAM_PERIPH_LOCK_WANTED;
|
|
wakeup(periph);
|
|
}
|
|
|
|
cam_periph_release(periph);
|
|
}
|
|
|
|
/*
|
|
* Map user virtual pointers into kernel virtual address space, so we can
|
|
* access the memory. This won't work on physical pointers, for now it's
|
|
* up to the caller to check for that. (XXX KDM -- should we do that here
|
|
* instead?) This also only works for up to MAXPHYS memory. Since we use
|
|
* buffers to map stuff in and out, we're limited to the buffer size.
|
|
*/
|
|
int
|
|
cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo)
|
|
{
|
|
int numbufs, i, j;
|
|
int flags[CAM_PERIPH_MAXMAPS];
|
|
u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
|
|
u_int32_t lengths[CAM_PERIPH_MAXMAPS];
|
|
u_int32_t dirs[CAM_PERIPH_MAXMAPS];
|
|
|
|
switch(ccb->ccb_h.func_code) {
|
|
case XPT_DEV_MATCH:
|
|
if (ccb->cdm.match_buf_len == 0) {
|
|
printf("cam_periph_mapmem: invalid match buffer "
|
|
"length 0\n");
|
|
return(EINVAL);
|
|
}
|
|
if (ccb->cdm.pattern_buf_len > 0) {
|
|
data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
|
|
lengths[0] = ccb->cdm.pattern_buf_len;
|
|
dirs[0] = CAM_DIR_OUT;
|
|
data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
|
|
lengths[1] = ccb->cdm.match_buf_len;
|
|
dirs[1] = CAM_DIR_IN;
|
|
numbufs = 2;
|
|
} else {
|
|
data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
|
|
lengths[0] = ccb->cdm.match_buf_len;
|
|
dirs[0] = CAM_DIR_IN;
|
|
numbufs = 1;
|
|
}
|
|
break;
|
|
case XPT_SCSI_IO:
|
|
case XPT_CONT_TARGET_IO:
|
|
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
|
|
return(0);
|
|
|
|
data_ptrs[0] = &ccb->csio.data_ptr;
|
|
lengths[0] = ccb->csio.dxfer_len;
|
|
dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK;
|
|
numbufs = 1;
|
|
break;
|
|
default:
|
|
return(EINVAL);
|
|
break; /* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Check the transfer length and permissions first, so we don't
|
|
* have to unmap any previously mapped buffers.
|
|
*/
|
|
for (i = 0; i < numbufs; i++) {
|
|
|
|
flags[i] = 0;
|
|
|
|
/*
|
|
* The userland data pointer passed in may not be page
|
|
* aligned. vmapbuf() truncates the address to a page
|
|
* boundary, so if the address isn't page aligned, we'll
|
|
* need enough space for the given transfer length, plus
|
|
* whatever extra space is necessary to make it to the page
|
|
* boundary.
|
|
*/
|
|
if ((lengths[i] +
|
|
(((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > DFLTPHYS){
|
|
printf("cam_periph_mapmem: attempt to map %lu bytes, "
|
|
"which is greater than DFLTPHYS(%d)\n",
|
|
(long)(lengths[i] +
|
|
(((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)),
|
|
DFLTPHYS);
|
|
return(E2BIG);
|
|
}
|
|
|
|
if (dirs[i] & CAM_DIR_OUT) {
|
|
flags[i] = BIO_WRITE;
|
|
}
|
|
|
|
if (dirs[i] & CAM_DIR_IN) {
|
|
flags[i] = BIO_READ;
|
|
}
|
|
|
|
}
|
|
|
|
/* this keeps the current process from getting swapped */
|
|
/*
|
|
* XXX KDM should I use P_NOSWAP instead?
|
|
*/
|
|
PHOLD(curproc);
|
|
|
|
for (i = 0; i < numbufs; i++) {
|
|
/*
|
|
* Get the buffer.
|
|
*/
|
|
mapinfo->bp[i] = getpbuf(NULL);
|
|
|
|
/* save the buffer's data address */
|
|
mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data;
|
|
|
|
/* put our pointer in the data slot */
|
|
mapinfo->bp[i]->b_data = *data_ptrs[i];
|
|
|
|
/* set the transfer length, we know it's < DFLTPHYS */
|
|
mapinfo->bp[i]->b_bufsize = lengths[i];
|
|
|
|
/* set the direction */
|
|
mapinfo->bp[i]->b_iocmd = flags[i];
|
|
|
|
/*
|
|
* Map the buffer into kernel memory.
|
|
*
|
|
* Note that useracc() alone is not a sufficient test.
|
|
* vmapbuf() can still fail due to a smaller file mapped
|
|
* into a larger area of VM, or if userland races against
|
|
* vmapbuf() after the useracc() check.
|
|
*/
|
|
if (vmapbuf(mapinfo->bp[i]) < 0) {
|
|
for (j = 0; j < i; ++j) {
|
|
*data_ptrs[j] = mapinfo->bp[j]->b_saveaddr;
|
|
vunmapbuf(mapinfo->bp[j]);
|
|
relpbuf(mapinfo->bp[j], NULL);
|
|
}
|
|
relpbuf(mapinfo->bp[i], NULL);
|
|
PRELE(curproc);
|
|
return(EACCES);
|
|
}
|
|
|
|
/* set our pointer to the new mapped area */
|
|
*data_ptrs[i] = mapinfo->bp[i]->b_data;
|
|
|
|
mapinfo->num_bufs_used++;
|
|
}
|
|
|
|
/*
|
|
* Now that we've gotten this far, change ownership to the kernel
|
|
* of the buffers so that we don't run afoul of returning to user
|
|
* space with locks (on the buffer) held.
|
|
*/
|
|
for (i = 0; i < numbufs; i++) {
|
|
BUF_KERNPROC(mapinfo->bp[i]);
|
|
}
|
|
|
|
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Unmap memory segments mapped into kernel virtual address space by
|
|
* cam_periph_mapmem().
|
|
*/
|
|
void
|
|
cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo)
|
|
{
|
|
int numbufs, i;
|
|
u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
|
|
|
|
if (mapinfo->num_bufs_used <= 0) {
|
|
/* allow ourselves to be swapped once again */
|
|
PRELE(curproc);
|
|
return;
|
|
}
|
|
|
|
switch (ccb->ccb_h.func_code) {
|
|
case XPT_DEV_MATCH:
|
|
numbufs = min(mapinfo->num_bufs_used, 2);
|
|
|
|
if (numbufs == 1) {
|
|
data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
|
|
} else {
|
|
data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
|
|
data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
|
|
}
|
|
break;
|
|
case XPT_SCSI_IO:
|
|
case XPT_CONT_TARGET_IO:
|
|
data_ptrs[0] = &ccb->csio.data_ptr;
|
|
numbufs = min(mapinfo->num_bufs_used, 1);
|
|
break;
|
|
default:
|
|
/* allow ourselves to be swapped once again */
|
|
PRELE(curproc);
|
|
return;
|
|
break; /* NOTREACHED */
|
|
}
|
|
|
|
for (i = 0; i < numbufs; i++) {
|
|
/* Set the user's pointer back to the original value */
|
|
*data_ptrs[i] = mapinfo->bp[i]->b_saveaddr;
|
|
|
|
/* unmap the buffer */
|
|
vunmapbuf(mapinfo->bp[i]);
|
|
|
|
/* release the buffer */
|
|
relpbuf(mapinfo->bp[i], NULL);
|
|
}
|
|
|
|
/* allow ourselves to be swapped once again */
|
|
PRELE(curproc);
|
|
}
|
|
|
|
union ccb *
|
|
cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
|
|
{
|
|
struct ccb_hdr *ccb_h;
|
|
int s;
|
|
|
|
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdgetccb\n"));
|
|
|
|
s = splsoftcam();
|
|
|
|
while (SLIST_FIRST(&periph->ccb_list) == NULL) {
|
|
if (periph->immediate_priority > priority)
|
|
periph->immediate_priority = priority;
|
|
xpt_schedule(periph, priority);
|
|
if ((SLIST_FIRST(&periph->ccb_list) != NULL)
|
|
&& (SLIST_FIRST(&periph->ccb_list)->pinfo.priority == priority))
|
|
break;
|
|
tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0);
|
|
}
|
|
|
|
ccb_h = SLIST_FIRST(&periph->ccb_list);
|
|
SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
|
|
splx(s);
|
|
return ((union ccb *)ccb_h);
|
|
}
|
|
|
|
void
|
|
cam_periph_ccbwait(union ccb *ccb)
|
|
{
|
|
int s;
|
|
|
|
s = splsoftcam();
|
|
if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX)
|
|
|| ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG))
|
|
tsleep(&ccb->ccb_h.cbfcnp, PRIBIO, "cbwait", 0);
|
|
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
cam_periph_ioctl(struct cam_periph *periph, int cmd, caddr_t addr,
|
|
int (*error_routine)(union ccb *ccb,
|
|
cam_flags camflags,
|
|
u_int32_t sense_flags))
|
|
{
|
|
union ccb *ccb;
|
|
int error;
|
|
int found;
|
|
|
|
error = found = 0;
|
|
|
|
switch(cmd){
|
|
case CAMGETPASSTHRU:
|
|
ccb = cam_periph_getccb(periph, /* priority */ 1);
|
|
xpt_setup_ccb(&ccb->ccb_h,
|
|
ccb->ccb_h.path,
|
|
/*priority*/1);
|
|
ccb->ccb_h.func_code = XPT_GDEVLIST;
|
|
|
|
/*
|
|
* Basically, the point of this is that we go through
|
|
* getting the list of devices, until we find a passthrough
|
|
* device. In the current version of the CAM code, the
|
|
* only way to determine what type of device we're dealing
|
|
* with is by its name.
|
|
*/
|
|
while (found == 0) {
|
|
ccb->cgdl.index = 0;
|
|
ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS;
|
|
while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) {
|
|
|
|
/* we want the next device in the list */
|
|
xpt_action(ccb);
|
|
if (strncmp(ccb->cgdl.periph_name,
|
|
"pass", 4) == 0){
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) &&
|
|
(found == 0)) {
|
|
ccb->cgdl.periph_name[0] = '\0';
|
|
ccb->cgdl.unit_number = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* copy the result back out */
|
|
bcopy(ccb, addr, sizeof(union ccb));
|
|
|
|
/* and release the ccb */
|
|
xpt_release_ccb(ccb);
|
|
|
|
break;
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
cam_periph_runccb(union ccb *ccb,
|
|
int (*error_routine)(union ccb *ccb,
|
|
cam_flags camflags,
|
|
u_int32_t sense_flags),
|
|
cam_flags camflags, u_int32_t sense_flags,
|
|
struct devstat *ds)
|
|
{
|
|
int error;
|
|
|
|
error = 0;
|
|
|
|
/*
|
|
* If the user has supplied a stats structure, and if we understand
|
|
* this particular type of ccb, record the transaction start.
|
|
*/
|
|
if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO))
|
|
devstat_start_transaction(ds, NULL);
|
|
|
|
xpt_action(ccb);
|
|
|
|
do {
|
|
cam_periph_ccbwait(ccb);
|
|
if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP)
|
|
error = 0;
|
|
else if (error_routine != NULL)
|
|
error = (*error_routine)(ccb, camflags, sense_flags);
|
|
else
|
|
error = 0;
|
|
|
|
} while (error == ERESTART);
|
|
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
|
|
cam_release_devq(ccb->ccb_h.path,
|
|
/* relsim_flags */0,
|
|
/* openings */0,
|
|
/* timeout */0,
|
|
/* getcount_only */ FALSE);
|
|
|
|
if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO))
|
|
devstat_end_transaction(ds,
|
|
ccb->csio.dxfer_len,
|
|
ccb->csio.tag_action & 0xf,
|
|
((ccb->ccb_h.flags & CAM_DIR_MASK) ==
|
|
CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
|
|
(ccb->ccb_h.flags & CAM_DIR_OUT) ?
|
|
DEVSTAT_WRITE :
|
|
DEVSTAT_READ, NULL, NULL);
|
|
|
|
return(error);
|
|
}
|
|
|
|
void
|
|
cam_freeze_devq(struct cam_path *path)
|
|
{
|
|
struct ccb_hdr ccb_h;
|
|
|
|
xpt_setup_ccb(&ccb_h, path, /*priority*/1);
|
|
ccb_h.func_code = XPT_NOOP;
|
|
ccb_h.flags = CAM_DEV_QFREEZE;
|
|
xpt_action((union ccb *)&ccb_h);
|
|
}
|
|
|
|
u_int32_t
|
|
cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
|
|
u_int32_t openings, u_int32_t timeout,
|
|
int getcount_only)
|
|
{
|
|
struct ccb_relsim crs;
|
|
|
|
xpt_setup_ccb(&crs.ccb_h, path,
|
|
/*priority*/1);
|
|
crs.ccb_h.func_code = XPT_REL_SIMQ;
|
|
crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0;
|
|
crs.release_flags = relsim_flags;
|
|
crs.openings = openings;
|
|
crs.release_timeout = timeout;
|
|
xpt_action((union ccb *)&crs);
|
|
return (crs.qfrozen_cnt);
|
|
}
|
|
|
|
#define saved_ccb_ptr ppriv_ptr0
|
|
static void
|
|
camperiphdone(struct cam_periph *periph, union ccb *done_ccb)
|
|
{
|
|
union ccb *saved_ccb;
|
|
cam_status status;
|
|
int frozen;
|
|
int sense;
|
|
struct scsi_start_stop_unit *scsi_cmd;
|
|
u_int32_t relsim_flags, timeout;
|
|
u_int32_t qfrozen_cnt;
|
|
int xpt_done_ccb;
|
|
|
|
xpt_done_ccb = FALSE;
|
|
status = done_ccb->ccb_h.status;
|
|
frozen = (status & CAM_DEV_QFRZN) != 0;
|
|
sense = (status & CAM_AUTOSNS_VALID) != 0;
|
|
status &= CAM_STATUS_MASK;
|
|
|
|
timeout = 0;
|
|
relsim_flags = 0;
|
|
saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr;
|
|
|
|
/*
|
|
* Unfreeze the queue once if it is already frozen..
|
|
*/
|
|
if (frozen != 0) {
|
|
qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path,
|
|
/*relsim_flags*/0,
|
|
/*openings*/0,
|
|
/*timeout*/0,
|
|
/*getcount_only*/0);
|
|
}
|
|
|
|
switch (status) {
|
|
case CAM_REQ_CMP:
|
|
{
|
|
/*
|
|
* If we have successfully taken a device from the not
|
|
* ready to ready state, re-scan the device and re-get
|
|
* the inquiry information. Many devices (mostly disks)
|
|
* don't properly report their inquiry information unless
|
|
* they are spun up.
|
|
*
|
|
* If we manually retrieved sense into a CCB and got
|
|
* something other than "NO SENSE" send the updated CCB
|
|
* back to the client via xpt_done() to be processed via
|
|
* the error recovery code again.
|
|
*/
|
|
if (done_ccb->ccb_h.func_code == XPT_SCSI_IO) {
|
|
scsi_cmd = (struct scsi_start_stop_unit *)
|
|
&done_ccb->csio.cdb_io.cdb_bytes;
|
|
|
|
if (scsi_cmd->opcode == START_STOP_UNIT)
|
|
xpt_async(AC_INQ_CHANGED,
|
|
done_ccb->ccb_h.path, NULL);
|
|
if (scsi_cmd->opcode == REQUEST_SENSE) {
|
|
u_int sense_key;
|
|
|
|
sense_key = saved_ccb->csio.sense_data.flags;
|
|
sense_key &= SSD_KEY;
|
|
if (sense_key != SSD_KEY_NO_SENSE) {
|
|
saved_ccb->ccb_h.status |=
|
|
CAM_AUTOSNS_VALID;
|
|
#if 0
|
|
xpt_print_path(saved_ccb->ccb_h.path);
|
|
printf("Recovered Sense\n");
|
|
scsi_sense_print(&saved_ccb->csio);
|
|
cam_error_print(saved_ccb, CAM_ESF_ALL,
|
|
CAM_EPF_ALL);
|
|
#endif
|
|
xpt_done_ccb = TRUE;
|
|
}
|
|
}
|
|
}
|
|
bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb,
|
|
sizeof(union ccb));
|
|
|
|
periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
|
|
|
|
if (xpt_done_ccb == FALSE)
|
|
xpt_action(done_ccb);
|
|
|
|
break;
|
|
}
|
|
case CAM_SCSI_STATUS_ERROR:
|
|
scsi_cmd = (struct scsi_start_stop_unit *)
|
|
&done_ccb->csio.cdb_io.cdb_bytes;
|
|
if (sense != 0) {
|
|
struct ccb_getdev cgd;
|
|
struct scsi_sense_data *sense;
|
|
int error_code, sense_key, asc, ascq;
|
|
scsi_sense_action err_action;
|
|
|
|
sense = &done_ccb->csio.sense_data;
|
|
scsi_extract_sense(sense, &error_code,
|
|
&sense_key, &asc, &ascq);
|
|
|
|
/*
|
|
* Grab the inquiry data for this device.
|
|
*/
|
|
xpt_setup_ccb(&cgd.ccb_h, done_ccb->ccb_h.path,
|
|
/*priority*/ 1);
|
|
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
|
|
xpt_action((union ccb *)&cgd);
|
|
err_action = scsi_error_action(&done_ccb->csio,
|
|
&cgd.inq_data, 0);
|
|
|
|
/*
|
|
* If the error is "invalid field in CDB",
|
|
* and the load/eject flag is set, turn the
|
|
* flag off and try again. This is just in
|
|
* case the drive in question barfs on the
|
|
* load eject flag. The CAM code should set
|
|
* the load/eject flag by default for
|
|
* removable media.
|
|
*/
|
|
|
|
/* XXX KDM
|
|
* Should we check to see what the specific
|
|
* scsi status is?? Or does it not matter
|
|
* since we already know that there was an
|
|
* error, and we know what the specific
|
|
* error code was, and we know what the
|
|
* opcode is..
|
|
*/
|
|
if ((scsi_cmd->opcode == START_STOP_UNIT) &&
|
|
((scsi_cmd->how & SSS_LOEJ) != 0) &&
|
|
(asc == 0x24) && (ascq == 0x00) &&
|
|
(done_ccb->ccb_h.retry_count > 0)) {
|
|
|
|
scsi_cmd->how &= ~SSS_LOEJ;
|
|
|
|
xpt_action(done_ccb);
|
|
|
|
} else if ((done_ccb->ccb_h.retry_count > 1)
|
|
&& ((err_action & SS_MASK) != SS_FAIL)) {
|
|
|
|
/*
|
|
* In this case, the error recovery
|
|
* command failed, but we've got
|
|
* some retries left on it. Give
|
|
* it another try unless this is an
|
|
* unretryable error.
|
|
*/
|
|
|
|
/* set the timeout to .5 sec */
|
|
relsim_flags =
|
|
RELSIM_RELEASE_AFTER_TIMEOUT;
|
|
timeout = 500;
|
|
|
|
xpt_action(done_ccb);
|
|
|
|
break;
|
|
|
|
} else {
|
|
/*
|
|
* Perform the final retry with the original
|
|
* CCB so that final error processing is
|
|
* performed by the owner of the CCB.
|
|
*/
|
|
bcopy(done_ccb->ccb_h.saved_ccb_ptr,
|
|
done_ccb, sizeof(union ccb));
|
|
|
|
periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
|
|
|
|
xpt_action(done_ccb);
|
|
}
|
|
} else {
|
|
/*
|
|
* Eh?? The command failed, but we don't
|
|
* have any sense. What's up with that?
|
|
* Fire the CCB again to return it to the
|
|
* caller.
|
|
*/
|
|
bcopy(done_ccb->ccb_h.saved_ccb_ptr,
|
|
done_ccb, sizeof(union ccb));
|
|
|
|
periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
|
|
|
|
xpt_action(done_ccb);
|
|
|
|
}
|
|
break;
|
|
default:
|
|
bcopy(done_ccb->ccb_h.saved_ccb_ptr, done_ccb,
|
|
sizeof(union ccb));
|
|
|
|
periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
|
|
|
|
xpt_action(done_ccb);
|
|
|
|
break;
|
|
}
|
|
|
|
/* decrement the retry count */
|
|
/*
|
|
* XXX This isn't appropriate in all cases. Restructure,
|
|
* so that the retry count is only decremented on an
|
|
* actual retry. Remeber that the orignal ccb had its
|
|
* retry count dropped before entering recovery, so
|
|
* doing it again is a bug.
|
|
*/
|
|
if (done_ccb->ccb_h.retry_count > 0)
|
|
done_ccb->ccb_h.retry_count--;
|
|
|
|
qfrozen_cnt = cam_release_devq(done_ccb->ccb_h.path,
|
|
/*relsim_flags*/relsim_flags,
|
|
/*openings*/0,
|
|
/*timeout*/timeout,
|
|
/*getcount_only*/0);
|
|
if (xpt_done_ccb == TRUE)
|
|
(*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
|
|
}
|
|
|
|
/*
|
|
* Generic Async Event handler. Peripheral drivers usually
|
|
* filter out the events that require personal attention,
|
|
* and leave the rest to this function.
|
|
*/
|
|
void
|
|
cam_periph_async(struct cam_periph *periph, u_int32_t code,
|
|
struct cam_path *path, void *arg)
|
|
{
|
|
switch (code) {
|
|
case AC_LOST_DEVICE:
|
|
cam_periph_invalidate(periph);
|
|
break;
|
|
case AC_SENT_BDR:
|
|
case AC_BUS_RESET:
|
|
{
|
|
cam_periph_bus_settle(periph, scsi_delay);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle)
|
|
{
|
|
struct ccb_getdevstats cgds;
|
|
|
|
xpt_setup_ccb(&cgds.ccb_h, periph->path, /*priority*/1);
|
|
cgds.ccb_h.func_code = XPT_GDEV_STATS;
|
|
xpt_action((union ccb *)&cgds);
|
|
cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle);
|
|
}
|
|
|
|
void
|
|
cam_periph_freeze_after_event(struct cam_periph *periph,
|
|
struct timeval* event_time, u_int duration_ms)
|
|
{
|
|
struct timeval delta;
|
|
struct timeval duration_tv;
|
|
int s;
|
|
|
|
s = splclock();
|
|
microtime(&delta);
|
|
splx(s);
|
|
timevalsub(&delta, event_time);
|
|
duration_tv.tv_sec = duration_ms / 1000;
|
|
duration_tv.tv_usec = (duration_ms % 1000) * 1000;
|
|
if (timevalcmp(&delta, &duration_tv, <)) {
|
|
timevalsub(&duration_tv, &delta);
|
|
|
|
duration_ms = duration_tv.tv_sec * 1000;
|
|
duration_ms += duration_tv.tv_usec / 1000;
|
|
cam_freeze_devq(periph->path);
|
|
cam_release_devq(periph->path,
|
|
RELSIM_RELEASE_AFTER_TIMEOUT,
|
|
/*reduction*/0,
|
|
/*timeout*/duration_ms,
|
|
/*getcount_only*/0);
|
|
}
|
|
|
|
}
|
|
|
|
static int
|
|
camperiphscsistatuserror(union ccb *ccb, cam_flags camflags,
|
|
u_int32_t sense_flags, union ccb *save_ccb,
|
|
int *openings, u_int32_t *relsim_flags,
|
|
u_int32_t *timeout)
|
|
{
|
|
int error;
|
|
|
|
switch (ccb->csio.scsi_status) {
|
|
case SCSI_STATUS_OK:
|
|
case SCSI_STATUS_COND_MET:
|
|
case SCSI_STATUS_INTERMED:
|
|
case SCSI_STATUS_INTERMED_COND_MET:
|
|
error = 0;
|
|
break;
|
|
case SCSI_STATUS_CMD_TERMINATED:
|
|
case SCSI_STATUS_CHECK_COND:
|
|
error = camperiphscsisenseerror(ccb,
|
|
camflags,
|
|
sense_flags,
|
|
save_ccb,
|
|
openings,
|
|
relsim_flags,
|
|
timeout);
|
|
break;
|
|
case SCSI_STATUS_QUEUE_FULL:
|
|
{
|
|
/* no decrement */
|
|
struct ccb_getdevstats cgds;
|
|
|
|
/*
|
|
* First off, find out what the current
|
|
* transaction counts are.
|
|
*/
|
|
xpt_setup_ccb(&cgds.ccb_h,
|
|
ccb->ccb_h.path,
|
|
/*priority*/1);
|
|
cgds.ccb_h.func_code = XPT_GDEV_STATS;
|
|
xpt_action((union ccb *)&cgds);
|
|
|
|
/*
|
|
* If we were the only transaction active, treat
|
|
* the QUEUE FULL as if it were a BUSY condition.
|
|
*/
|
|
if (cgds.dev_active != 0) {
|
|
int total_openings;
|
|
|
|
/*
|
|
* Reduce the number of openings to
|
|
* be 1 less than the amount it took
|
|
* to get a queue full bounded by the
|
|
* minimum allowed tag count for this
|
|
* device.
|
|
*/
|
|
total_openings = cgds.dev_active + cgds.dev_openings;
|
|
*openings = cgds.dev_active;
|
|
if (*openings < cgds.mintags)
|
|
*openings = cgds.mintags;
|
|
if (*openings < total_openings)
|
|
*relsim_flags = RELSIM_ADJUST_OPENINGS;
|
|
else {
|
|
/*
|
|
* Some devices report queue full for
|
|
* temporary resource shortages. For
|
|
* this reason, we allow a minimum
|
|
* tag count to be entered via a
|
|
* quirk entry to prevent the queue
|
|
* count on these devices from falling
|
|
* to a pessimisticly low value. We
|
|
* still wait for the next successful
|
|
* completion, however, before queueing
|
|
* more transactions to the device.
|
|
*/
|
|
*relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT;
|
|
}
|
|
*timeout = 0;
|
|
error = ERESTART;
|
|
if (bootverbose) {
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("Queue Full\n");
|
|
}
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
}
|
|
case SCSI_STATUS_BUSY:
|
|
/*
|
|
* Restart the queue after either another
|
|
* command completes or a 1 second timeout.
|
|
*/
|
|
if (bootverbose) {
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("Device Busy\n");
|
|
}
|
|
if (ccb->ccb_h.retry_count > 0) {
|
|
ccb->ccb_h.retry_count--;
|
|
error = ERESTART;
|
|
*relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT
|
|
| RELSIM_RELEASE_AFTER_CMDCMPLT;
|
|
*timeout = 1000;
|
|
} else {
|
|
error = EIO;
|
|
}
|
|
break;
|
|
case SCSI_STATUS_RESERV_CONFLICT:
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("Reservation Conflict\n");
|
|
error = EIO;
|
|
break;
|
|
default:
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("SCSI Status 0x%x\n", ccb->csio.scsi_status);
|
|
error = EIO;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
camperiphscsisenseerror(union ccb *ccb, cam_flags camflags,
|
|
u_int32_t sense_flags, union ccb *save_ccb,
|
|
int *openings, u_int32_t *relsim_flags,
|
|
u_int32_t *timeout)
|
|
{
|
|
struct cam_periph *periph;
|
|
int error;
|
|
|
|
periph = xpt_path_periph(ccb->ccb_h.path);
|
|
if (periph->flags & CAM_PERIPH_RECOVERY_INPROG) {
|
|
|
|
/*
|
|
* If error recovery is already in progress, don't attempt
|
|
* to process this error, but requeue it unconditionally
|
|
* and attempt to process it once error recovery has
|
|
* completed. This failed command is probably related to
|
|
* the error that caused the currently active error recovery
|
|
* action so our current recovery efforts should also
|
|
* address this command. Be aware that the error recovery
|
|
* code assumes that only one recovery action is in progress
|
|
* on a particular peripheral instance at any given time
|
|
* (e.g. only one saved CCB for error recovery) so it is
|
|
* imperitive that we don't violate this assumption.
|
|
*/
|
|
error = ERESTART;
|
|
} else {
|
|
scsi_sense_action err_action;
|
|
struct ccb_getdev cgd;
|
|
const char *action_string;
|
|
union ccb* print_ccb;
|
|
|
|
/* A description of the error recovery action performed */
|
|
action_string = NULL;
|
|
|
|
/*
|
|
* The location of the orignal ccb
|
|
* for sense printing purposes.
|
|
*/
|
|
print_ccb = ccb;
|
|
|
|
/*
|
|
* Grab the inquiry data for this device.
|
|
*/
|
|
xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, /*priority*/ 1);
|
|
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
|
|
xpt_action((union ccb *)&cgd);
|
|
|
|
if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0)
|
|
err_action = scsi_error_action(&ccb->csio,
|
|
&cgd.inq_data,
|
|
sense_flags);
|
|
else if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0)
|
|
err_action = SS_REQSENSE;
|
|
else
|
|
err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO;
|
|
|
|
error = err_action & SS_ERRMASK;
|
|
|
|
/*
|
|
* If the recovery action will consume a retry,
|
|
* make sure we actually have retries available.
|
|
*/
|
|
if ((err_action & SSQ_DECREMENT_COUNT) != 0) {
|
|
if (ccb->ccb_h.retry_count > 0)
|
|
ccb->ccb_h.retry_count--;
|
|
else {
|
|
action_string = "Retries Exhausted";
|
|
goto sense_error_done;
|
|
}
|
|
}
|
|
|
|
if ((err_action & SS_MASK) >= SS_START) {
|
|
/*
|
|
* Do common portions of commands that
|
|
* use recovery CCBs.
|
|
*/
|
|
if (save_ccb == NULL) {
|
|
action_string = "No recovery CCB supplied";
|
|
goto sense_error_done;
|
|
}
|
|
bcopy(ccb, save_ccb, sizeof(*save_ccb));
|
|
print_ccb = save_ccb;
|
|
periph->flags |= CAM_PERIPH_RECOVERY_INPROG;
|
|
}
|
|
|
|
switch (err_action & SS_MASK) {
|
|
case SS_NOP:
|
|
action_string = "No Recovery Action Needed";
|
|
error = 0;
|
|
break;
|
|
case SS_RETRY:
|
|
action_string = "Retrying Command (per Sense Data)";
|
|
error = ERESTART;
|
|
break;
|
|
case SS_FAIL:
|
|
action_string = "Unretryable error";
|
|
break;
|
|
case SS_START:
|
|
{
|
|
int le;
|
|
|
|
/*
|
|
* Send a start unit command to the device, and
|
|
* then retry the command.
|
|
*/
|
|
action_string = "Attempting to Start Unit";
|
|
|
|
/*
|
|
* Check for removable media and set
|
|
* load/eject flag appropriately.
|
|
*/
|
|
if (SID_IS_REMOVABLE(&cgd.inq_data))
|
|
le = TRUE;
|
|
else
|
|
le = FALSE;
|
|
|
|
scsi_start_stop(&ccb->csio,
|
|
/*retries*/1,
|
|
camperiphdone,
|
|
MSG_SIMPLE_Q_TAG,
|
|
/*start*/TRUE,
|
|
/*load/eject*/le,
|
|
/*immediate*/FALSE,
|
|
SSD_FULL_SIZE,
|
|
/*timeout*/50000);
|
|
break;
|
|
}
|
|
case SS_TUR:
|
|
{
|
|
/*
|
|
* Send a Test Unit Ready to the device.
|
|
* If the 'many' flag is set, we send 120
|
|
* test unit ready commands, one every half
|
|
* second. Otherwise, we just send one TUR.
|
|
* We only want to do this if the retry
|
|
* count has not been exhausted.
|
|
*/
|
|
int retries;
|
|
|
|
if ((err_action & SSQ_MANY) != 0) {
|
|
action_string = "Polling device for readiness";
|
|
retries = 120;
|
|
} else {
|
|
action_string = "Testing device for readiness";
|
|
retries = 1;
|
|
}
|
|
scsi_test_unit_ready(&ccb->csio,
|
|
retries,
|
|
camperiphdone,
|
|
MSG_SIMPLE_Q_TAG,
|
|
SSD_FULL_SIZE,
|
|
/*timeout*/5000);
|
|
|
|
/*
|
|
* Accomplish our 500ms delay by deferring
|
|
* the release of our device queue appropriately.
|
|
*/
|
|
*relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
|
|
*timeout = 500;
|
|
break;
|
|
}
|
|
case SS_REQSENSE:
|
|
{
|
|
/*
|
|
* Send a Request Sense to the device. We
|
|
* assume that we are in a contingent allegiance
|
|
* condition so we do not tag this request.
|
|
*/
|
|
scsi_request_sense(&ccb->csio, /*retries*/1,
|
|
camperiphdone,
|
|
&save_ccb->csio.sense_data,
|
|
sizeof(save_ccb->csio.sense_data),
|
|
CAM_TAG_ACTION_NONE,
|
|
/*sense_len*/SSD_FULL_SIZE,
|
|
/*timeout*/5000);
|
|
break;
|
|
}
|
|
default:
|
|
panic("Unhandled error action %x", err_action);
|
|
}
|
|
|
|
if ((err_action & SS_MASK) >= SS_START) {
|
|
/*
|
|
* Drop the priority to 0 so that the recovery
|
|
* CCB is the first to execute. Freeze the queue
|
|
* after this command is sent so that we can
|
|
* restore the old csio and have it queued in
|
|
* the proper order before we release normal
|
|
* transactions to the device.
|
|
*/
|
|
ccb->ccb_h.pinfo.priority = 0;
|
|
ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
|
|
ccb->ccb_h.saved_ccb_ptr = save_ccb;
|
|
error = ERESTART;
|
|
}
|
|
|
|
sense_error_done:
|
|
if ((err_action & SSQ_PRINT_SENSE) != 0
|
|
&& (ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) {
|
|
cam_error_print(print_ccb, CAM_ESF_ALL, CAM_EPF_ALL);
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
if (bootverbose)
|
|
scsi_sense_print(&print_ccb->csio);
|
|
printf("%s\n", action_string);
|
|
}
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Generic error handler. Peripheral drivers usually filter
|
|
* out the errors that they handle in a unique mannor, then
|
|
* call this function.
|
|
*/
|
|
int
|
|
cam_periph_error(union ccb *ccb, cam_flags camflags,
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u_int32_t sense_flags, union ccb *save_ccb)
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{
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const char *action_string;
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cam_status status;
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int frozen;
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int error, printed = 0;
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int openings;
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u_int32_t relsim_flags;
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u_int32_t timeout;
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action_string = NULL;
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status = ccb->ccb_h.status;
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frozen = (status & CAM_DEV_QFRZN) != 0;
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status &= CAM_STATUS_MASK;
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openings = relsim_flags = 0;
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switch (status) {
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case CAM_REQ_CMP:
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error = 0;
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break;
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case CAM_SCSI_STATUS_ERROR:
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error = camperiphscsistatuserror(ccb,
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camflags,
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sense_flags,
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save_ccb,
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&openings,
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&relsim_flags,
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&timeout);
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break;
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case CAM_AUTOSENSE_FAIL:
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xpt_print_path(ccb->ccb_h.path);
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printf("AutoSense Failed\n");
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error = EIO; /* we have to kill the command */
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break;
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case CAM_REQ_CMP_ERR:
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Request completed with CAM_REQ_CMP_ERR\n");
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printed++;
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}
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/* FALLTHROUGH */
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case CAM_CMD_TIMEOUT:
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Command timed out\n");
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printed++;
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}
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/* FALLTHROUGH */
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case CAM_UNEXP_BUSFREE:
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Unexpected Bus Free\n");
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printed++;
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}
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/* FALLTHROUGH */
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case CAM_UNCOR_PARITY:
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Uncorrected Parity Error\n");
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printed++;
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}
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/* FALLTHROUGH */
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case CAM_DATA_RUN_ERR:
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Data Overrun\n");
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printed++;
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}
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error = EIO; /* we have to kill the command */
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/* decrement the number of retries */
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if (ccb->ccb_h.retry_count > 0) {
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ccb->ccb_h.retry_count--;
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error = ERESTART;
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} else {
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action_string = "Retries Exausted";
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error = EIO;
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}
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break;
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case CAM_UA_ABORT:
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case CAM_UA_TERMIO:
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case CAM_MSG_REJECT_REC:
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/* XXX Don't know that these are correct */
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error = EIO;
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break;
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case CAM_SEL_TIMEOUT:
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{
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struct cam_path *newpath;
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if ((camflags & CAM_RETRY_SELTO) != 0) {
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if (ccb->ccb_h.retry_count > 0) {
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ccb->ccb_h.retry_count--;
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error = ERESTART;
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("Selection Timeout\n");
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printed++;
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}
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/*
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* Wait a second to give the device
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* time to recover before we try again.
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*/
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relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
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timeout = 1000;
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break;
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}
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}
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error = ENXIO;
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/* Should we do more if we can't create the path?? */
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if (xpt_create_path(&newpath, xpt_path_periph(ccb->ccb_h.path),
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xpt_path_path_id(ccb->ccb_h.path),
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xpt_path_target_id(ccb->ccb_h.path),
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CAM_LUN_WILDCARD) != CAM_REQ_CMP)
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break;
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/*
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* Let peripheral drivers know that this device has gone
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* away.
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*/
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xpt_async(AC_LOST_DEVICE, newpath, NULL);
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xpt_free_path(newpath);
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break;
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}
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case CAM_REQ_INVALID:
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case CAM_PATH_INVALID:
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case CAM_DEV_NOT_THERE:
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case CAM_NO_HBA:
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case CAM_PROVIDE_FAIL:
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case CAM_REQ_TOO_BIG:
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case CAM_LUN_INVALID:
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case CAM_TID_INVALID:
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error = EINVAL;
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break;
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case CAM_SCSI_BUS_RESET:
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case CAM_BDR_SENT:
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/*
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* Commands that repeatedly timeout and cause these
|
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* kinds of error recovery actions, should return
|
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* CAM_CMD_TIMEOUT, which allows us to safely assume
|
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* that this command was an innocent bystander to
|
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* these events and should be unconditionally
|
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* retried.
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*/
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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if (status == CAM_BDR_SENT)
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printf("Bus Device Reset sent\n");
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else
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printf("Bus Reset issued\n");
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printed++;
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}
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/* FALLTHROUGH */
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case CAM_REQUEUE_REQ:
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/* Unconditional requeue */
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error = ERESTART;
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if (bootverbose && printed == 0) {
|
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xpt_print_path(ccb->ccb_h.path);
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printf("Request Requeued\n");
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printed++;
|
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}
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break;
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case CAM_RESRC_UNAVAIL:
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case CAM_BUSY:
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/* timeout??? */
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default:
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/* decrement the number of retries */
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if (ccb->ccb_h.retry_count > 0) {
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ccb->ccb_h.retry_count--;
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error = ERESTART;
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if (bootverbose && printed == 0) {
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xpt_print_path(ccb->ccb_h.path);
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printf("CAM Status 0x%x\n", status);
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printed++;
|
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}
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} else {
|
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error = EIO;
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action_string = "Retries Exhausted";
|
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}
|
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break;
|
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}
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|
|
/* Attempt a retry */
|
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if (error == ERESTART || error == 0) {
|
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if (frozen != 0)
|
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ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
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|
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if (error == ERESTART) {
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action_string = "Retrying Command";
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xpt_action(ccb);
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}
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|
|
if (frozen != 0)
|
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cam_release_devq(ccb->ccb_h.path,
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relsim_flags,
|
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openings,
|
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timeout,
|
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/*getcount_only*/0);
|
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}
|
|
|
|
/*
|
|
* If we have and error and are booting verbosely, whine
|
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* *unless* this was a non-retryable selection timeout.
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*/
|
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if (error != 0 && bootverbose &&
|
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!(status == CAM_SEL_TIMEOUT && (camflags & CAM_RETRY_SELTO) == 0)) {
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|
|
|
|
|
if (action_string == NULL)
|
|
action_string = "Unretryable Error";
|
|
if (error != ERESTART) {
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("error %d\n", error);
|
|
}
|
|
xpt_print_path(ccb->ccb_h.path);
|
|
printf("%s\n", action_string);
|
|
}
|
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|
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return (error);
|
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}
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