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freebsd-skq/sys/cam/scsi/scsi_sa.c
scottl 2452912a61 cam_periph_runccb() changed several years ago to overwrite the ccb callback 
pointer.  It's now unhelpful and misleading for callers to continue to set
it, so bring all callers into conformance.  There's no real functional change,
but it makes reading the code a lot less confusing.

Sponsored by:	Netflix
2018-05-01 20:09:29 +00:00

5920 lines
160 KiB
C
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/*-
* Implementation of SCSI Sequential Access Peripheral driver for CAM.
*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1999, 2000 Matthew Jacob
* Copyright (c) 2013, 2014, 2015 Spectra Logic Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/bio.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/mtio.h>
#ifdef _KERNEL
#include <sys/conf.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#endif
#include <sys/fcntl.h>
#include <sys/devicestat.h>
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
#endif
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_sa.h>
#ifdef _KERNEL
#include "opt_sa.h"
#ifndef SA_IO_TIMEOUT
#define SA_IO_TIMEOUT 32
#endif
#ifndef SA_SPACE_TIMEOUT
#define SA_SPACE_TIMEOUT 1 * 60
#endif
#ifndef SA_REWIND_TIMEOUT
#define SA_REWIND_TIMEOUT 2 * 60
#endif
#ifndef SA_ERASE_TIMEOUT
#define SA_ERASE_TIMEOUT 4 * 60
#endif
#ifndef SA_REP_DENSITY_TIMEOUT
#define SA_REP_DENSITY_TIMEOUT 90
#endif
#define SCSIOP_TIMEOUT (60 * 1000) /* not an option */
#define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000)
#define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000)
#define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000)
#define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000)
#define REP_DENSITY_TIMEOUT (SA_REP_DENSITY_TIMEOUT * 60 * 1000)
/*
* Additional options that can be set for config: SA_1FM_AT_EOT
*/
#ifndef UNUSED_PARAMETER
#define UNUSED_PARAMETER(x) x = x
#endif
#define QFRLS(ccb) \
if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
/*
* Driver states
*/
static MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
typedef enum {
SA_STATE_NORMAL, SA_STATE_ABNORMAL
} sa_state;
#define ccb_pflags ppriv_field0
#define ccb_bp ppriv_ptr1
/* bits in ccb_pflags */
#define SA_POSITION_UPDATED 0x1
typedef enum {
SA_FLAG_OPEN = 0x0001,
SA_FLAG_FIXED = 0x0002,
SA_FLAG_TAPE_LOCKED = 0x0004,
SA_FLAG_TAPE_MOUNTED = 0x0008,
SA_FLAG_TAPE_WP = 0x0010,
SA_FLAG_TAPE_WRITTEN = 0x0020,
SA_FLAG_EOM_PENDING = 0x0040,
SA_FLAG_EIO_PENDING = 0x0080,
SA_FLAG_EOF_PENDING = 0x0100,
SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
SA_FLAG_EOF_PENDING),
SA_FLAG_INVALID = 0x0200,
SA_FLAG_COMP_ENABLED = 0x0400,
SA_FLAG_COMP_SUPP = 0x0800,
SA_FLAG_COMP_UNSUPP = 0x1000,
SA_FLAG_TAPE_FROZEN = 0x2000,
SA_FLAG_PROTECT_SUPP = 0x4000,
SA_FLAG_COMPRESSION = (SA_FLAG_COMP_SUPP|SA_FLAG_COMP_ENABLED|
SA_FLAG_COMP_UNSUPP),
SA_FLAG_SCTX_INIT = 0x8000
} sa_flags;
typedef enum {
SA_MODE_REWIND = 0x00,
SA_MODE_NOREWIND = 0x01,
SA_MODE_OFFLINE = 0x02
} sa_mode;
typedef enum {
SA_PARAM_NONE = 0x000,
SA_PARAM_BLOCKSIZE = 0x001,
SA_PARAM_DENSITY = 0x002,
SA_PARAM_COMPRESSION = 0x004,
SA_PARAM_BUFF_MODE = 0x008,
SA_PARAM_NUMBLOCKS = 0x010,
SA_PARAM_WP = 0x020,
SA_PARAM_SPEED = 0x040,
SA_PARAM_DENSITY_EXT = 0x080,
SA_PARAM_LBP = 0x100,
SA_PARAM_ALL = 0x1ff
} sa_params;
typedef enum {
SA_QUIRK_NONE = 0x000,
SA_QUIRK_NOCOMP = 0x001, /* Can't deal with compression at all*/
SA_QUIRK_FIXED = 0x002, /* Force fixed mode */
SA_QUIRK_VARIABLE = 0x004, /* Force variable mode */
SA_QUIRK_2FM = 0x008, /* Needs Two File Marks at EOD */
SA_QUIRK_1FM = 0x010, /* No more than 1 File Mark at EOD */
SA_QUIRK_NODREAD = 0x020, /* Don't try and dummy read density */
SA_QUIRK_NO_MODESEL = 0x040, /* Don't do mode select at all */
SA_QUIRK_NO_CPAGE = 0x080, /* Don't use DEVICE COMPRESSION page */
SA_QUIRK_NO_LONG_POS = 0x100 /* No long position information */
} sa_quirks;
#define SA_QUIRK_BIT_STRING \
"\020" \
"\001NOCOMP" \
"\002FIXED" \
"\003VARIABLE" \
"\0042FM" \
"\0051FM" \
"\006NODREAD" \
"\007NO_MODESEL" \
"\010NO_CPAGE" \
"\011NO_LONG_POS"
#define SAMODE(z) (dev2unit(z) & 0x3)
#define SA_IS_CTRL(z) (dev2unit(z) & (1 << 4))
#define SA_NOT_CTLDEV 0
#define SA_CTLDEV 1
#define SA_ATYPE_R 0
#define SA_ATYPE_NR 1
#define SA_ATYPE_ER 2
#define SA_NUM_ATYPES 3
#define SAMINOR(ctl, access) \
((ctl << 4) | (access & 0x3))
struct sa_devs {
struct cdev *ctl_dev;
struct cdev *r_dev;
struct cdev *nr_dev;
struct cdev *er_dev;
};
#define SASBADDBASE(sb, indent, data, xfmt, name, type, xsize, desc) \
sbuf_printf(sb, "%*s<%s type=\"%s\" size=\"%zd\" " \
"fmt=\"%s\" desc=\"%s\">" #xfmt "</%s>\n", indent, "", \
#name, #type, xsize, #xfmt, desc ? desc : "", data, #name);
#define SASBADDINT(sb, indent, data, fmt, name) \
SASBADDBASE(sb, indent, data, fmt, name, int, sizeof(data), \
NULL)
#define SASBADDINTDESC(sb, indent, data, fmt, name, desc) \
SASBADDBASE(sb, indent, data, fmt, name, int, sizeof(data), \
desc)
#define SASBADDUINT(sb, indent, data, fmt, name) \
SASBADDBASE(sb, indent, data, fmt, name, uint, sizeof(data), \
NULL)
#define SASBADDUINTDESC(sb, indent, data, fmt, name, desc) \
SASBADDBASE(sb, indent, data, fmt, name, uint, sizeof(data), \
desc)
#define SASBADDFIXEDSTR(sb, indent, data, fmt, name) \
SASBADDBASE(sb, indent, data, fmt, name, str, sizeof(data), \
NULL)
#define SASBADDFIXEDSTRDESC(sb, indent, data, fmt, name, desc) \
SASBADDBASE(sb, indent, data, fmt, name, str, sizeof(data), \
desc)
#define SASBADDVARSTR(sb, indent, data, fmt, name, maxlen) \
SASBADDBASE(sb, indent, data, fmt, name, str, maxlen, NULL)
#define SASBADDVARSTRDESC(sb, indent, data, fmt, name, maxlen, desc) \
SASBADDBASE(sb, indent, data, fmt, name, str, maxlen, desc)
#define SASBADDNODE(sb, indent, name) { \
sbuf_printf(sb, "%*s<%s type=\"%s\">\n", indent, "", #name, \
"node"); \
indent += 2; \
}
#define SASBADDNODENUM(sb, indent, name, num) { \
sbuf_printf(sb, "%*s<%s type=\"%s\" num=\"%d\">\n", indent, "", \
#name, "node", num); \
indent += 2; \
}
#define SASBENDNODE(sb, indent, name) { \
indent -= 2; \
sbuf_printf(sb, "%*s</%s>\n", indent, "", #name); \
}
#define SA_DENSITY_TYPES 4
struct sa_prot_state {
int initialized;
uint32_t prot_method;
uint32_t pi_length;
uint32_t lbp_w;
uint32_t lbp_r;
uint32_t rbdp;
};
struct sa_prot_info {
struct sa_prot_state cur_prot_state;
struct sa_prot_state pending_prot_state;
};
/*
* A table mapping protection parameters to their types and values.
*/
struct sa_prot_map {
char *name;
mt_param_set_type param_type;
off_t offset;
uint32_t min_val;
uint32_t max_val;
uint32_t *value;
} sa_prot_table[] = {
{ "prot_method", MT_PARAM_SET_UNSIGNED,
__offsetof(struct sa_prot_state, prot_method),
/*min_val*/ 0, /*max_val*/ 255, NULL },
{ "pi_length", MT_PARAM_SET_UNSIGNED,
__offsetof(struct sa_prot_state, pi_length),
/*min_val*/ 0, /*max_val*/ SA_CTRL_DP_PI_LENGTH_MASK, NULL },
{ "lbp_w", MT_PARAM_SET_UNSIGNED,
__offsetof(struct sa_prot_state, lbp_w),
/*min_val*/ 0, /*max_val*/ 1, NULL },
{ "lbp_r", MT_PARAM_SET_UNSIGNED,
__offsetof(struct sa_prot_state, lbp_r),
/*min_val*/ 0, /*max_val*/ 1, NULL },
{ "rbdp", MT_PARAM_SET_UNSIGNED,
__offsetof(struct sa_prot_state, rbdp),
/*min_val*/ 0, /*max_val*/ 1, NULL }
};
#define SA_NUM_PROT_ENTS nitems(sa_prot_table)
#define SA_PROT_ENABLED(softc) ((softc->flags & SA_FLAG_PROTECT_SUPP) \
&& (softc->prot_info.cur_prot_state.initialized != 0) \
&& (softc->prot_info.cur_prot_state.prot_method != 0))
#define SA_PROT_LEN(softc) softc->prot_info.cur_prot_state.pi_length
struct sa_softc {
sa_state state;
sa_flags flags;
sa_quirks quirks;
u_int si_flags;
struct cam_periph *periph;
struct bio_queue_head bio_queue;
int queue_count;
struct devstat *device_stats;
struct sa_devs devs;
int open_count;
int num_devs_to_destroy;
int blk_gran;
int blk_mask;
int blk_shift;
u_int32_t max_blk;
u_int32_t min_blk;
u_int32_t maxio;
u_int32_t cpi_maxio;
int allow_io_split;
int inject_eom;
int set_pews_status;
u_int32_t comp_algorithm;
u_int32_t saved_comp_algorithm;
u_int32_t media_blksize;
u_int32_t last_media_blksize;
u_int32_t media_numblks;
u_int8_t media_density;
u_int8_t speed;
u_int8_t scsi_rev;
u_int8_t dsreg; /* mtio mt_dsreg, redux */
int buffer_mode;
int filemarks;
union ccb saved_ccb;
int last_resid_was_io;
uint8_t density_type_bits[SA_DENSITY_TYPES];
int density_info_valid[SA_DENSITY_TYPES];
uint8_t density_info[SA_DENSITY_TYPES][SRDS_MAX_LENGTH];
struct sa_prot_info prot_info;
int sili;
int eot_warn;
/*
* Current position information. -1 means that the given value is
* unknown. fileno and blkno are always calculated. blkno is
* relative to the previous file mark. rep_fileno and rep_blkno
* are as reported by the drive, if it supports the long form
* report for the READ POSITION command. rep_blkno is relative to
* the beginning of the partition.
*
* bop means that the drive is at the beginning of the partition.
* eop means that the drive is between early warning and end of
* partition, inside the current partition.
* bpew means that the position is in a PEWZ (Programmable Early
* Warning Zone)
*/
daddr_t partition; /* Absolute from BOT */
daddr_t fileno; /* Relative to beginning of partition */
daddr_t blkno; /* Relative to last file mark */
daddr_t rep_blkno; /* Relative to beginning of partition */
daddr_t rep_fileno; /* Relative to beginning of partition */
int bop; /* Beginning of Partition */
int eop; /* End of Partition */
int bpew; /* Beyond Programmable Early Warning */
/*
* Latched Error Info
*/
struct {
struct scsi_sense_data _last_io_sense;
u_int64_t _last_io_resid;
u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
struct scsi_sense_data _last_ctl_sense;
u_int64_t _last_ctl_resid;
u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
#define last_io_sense errinfo._last_io_sense
#define last_io_resid errinfo._last_io_resid
#define last_io_cdb errinfo._last_io_cdb
#define last_ctl_sense errinfo._last_ctl_sense
#define last_ctl_resid errinfo._last_ctl_resid
#define last_ctl_cdb errinfo._last_ctl_cdb
} errinfo;
/*
* Misc other flags/state
*/
u_int32_t
: 29,
open_rdonly : 1, /* open read-only */
open_pending_mount : 1, /* open pending mount */
ctrl_mode : 1; /* control device open */
struct task sysctl_task;
struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;
};
struct sa_quirk_entry {
struct scsi_inquiry_pattern inq_pat; /* matching pattern */
sa_quirks quirks; /* specific quirk type */
u_int32_t prefblk; /* preferred blocksize when in fixed mode */
};
static struct sa_quirk_entry sa_quirk_table[] =
{
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
"ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"Python*", "*"}, SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 2525 25462", "-011"},
SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
"VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
},
#if 0
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
},
#endif
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
"HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
"*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
"123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{ /* jreynold@primenet.com */
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
"STT8000N*", "*"}, SA_QUIRK_1FM, 0
},
{ /* mike@sentex.net */
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
"STT20000*", "*"}, SA_QUIRK_1FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "SEAGATE",
"DAT 06241-XXX", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
" SLR*", "*"}, SA_QUIRK_1FM, 0
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
"5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
},
{
{ T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
"51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
}
};
static d_open_t saopen;
static d_close_t saclose;
static d_strategy_t sastrategy;
static d_ioctl_t saioctl;
static periph_init_t sainit;
static periph_ctor_t saregister;
static periph_oninv_t saoninvalidate;
static periph_dtor_t sacleanup;
static periph_start_t sastart;
static void saasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void sadone(struct cam_periph *periph,
union ccb *start_ccb);
static int saerror(union ccb *ccb, u_int32_t cam_flags,
u_int32_t sense_flags);
static int samarkswanted(struct cam_periph *);
static int sacheckeod(struct cam_periph *periph);
static int sagetparams(struct cam_periph *periph,
sa_params params_to_get,
u_int32_t *blocksize, u_int8_t *density,
u_int32_t *numblocks, int *buff_mode,
u_int8_t *write_protect, u_int8_t *speed,
int *comp_supported, int *comp_enabled,
u_int32_t *comp_algorithm,
sa_comp_t *comp_page,
struct scsi_control_data_prot_subpage
*prot_page, int dp_size,
int prot_changeable);
static int sasetprot(struct cam_periph *periph,
struct sa_prot_state *new_prot);
static int sasetparams(struct cam_periph *periph,
sa_params params_to_set,
u_int32_t blocksize, u_int8_t density,
u_int32_t comp_algorithm,
u_int32_t sense_flags);
static int sasetsili(struct cam_periph *periph,
struct mtparamset *ps, int num_params);
static int saseteotwarn(struct cam_periph *periph,
struct mtparamset *ps, int num_params);
static void safillprot(struct sa_softc *softc, int *indent,
struct sbuf *sb);
static void sapopulateprots(struct sa_prot_state *cur_state,
struct sa_prot_map *new_table,
int table_ents);
static struct sa_prot_map *safindprotent(char *name, struct sa_prot_map *table,
int table_ents);
static int sasetprotents(struct cam_periph *periph,
struct mtparamset *ps, int num_params);
static struct sa_param_ent *safindparament(struct mtparamset *ps);
static int saparamsetlist(struct cam_periph *periph,
struct mtsetlist *list, int need_copy);
static int saextget(struct cdev *dev, struct cam_periph *periph,
struct sbuf *sb, struct mtextget *g);
static int saparamget(struct sa_softc *softc, struct sbuf *sb);
static void saprevent(struct cam_periph *periph, int action);
static int sarewind(struct cam_periph *periph);
static int saspace(struct cam_periph *periph, int count,
scsi_space_code code);
static void sadevgonecb(void *arg);
static void sasetupdev(struct sa_softc *softc, struct cdev *dev);
static int samount(struct cam_periph *, int, struct cdev *);
static int saretension(struct cam_periph *periph);
static int sareservereleaseunit(struct cam_periph *periph,
int reserve);
static int saloadunload(struct cam_periph *periph, int load);
static int saerase(struct cam_periph *periph, int longerase);
static int sawritefilemarks(struct cam_periph *periph,
int nmarks, int setmarks, int immed);
static int sagetpos(struct cam_periph *periph);
static int sardpos(struct cam_periph *periph, int, u_int32_t *);
static int sasetpos(struct cam_periph *periph, int,
struct mtlocate *);
static void safilldenstypesb(struct sbuf *sb, int *indent,
uint8_t *buf, int buf_len,
int is_density);
static void safilldensitysb(struct sa_softc *softc, int *indent,
struct sbuf *sb);
#ifndef SA_DEFAULT_IO_SPLIT
#define SA_DEFAULT_IO_SPLIT 0
#endif
static int sa_allow_io_split = SA_DEFAULT_IO_SPLIT;
/*
* Tunable to allow the user to set a global allow_io_split value. Note
* that this WILL GO AWAY in FreeBSD 11.0. Silently splitting the I/O up
* is bad behavior, because it hides the true tape block size from the
* application.
*/
static SYSCTL_NODE(_kern_cam, OID_AUTO, sa, CTLFLAG_RD, 0,
"CAM Sequential Access Tape Driver");
SYSCTL_INT(_kern_cam_sa, OID_AUTO, allow_io_split, CTLFLAG_RDTUN,
&sa_allow_io_split, 0, "Default I/O split value");
static struct periph_driver sadriver =
{
sainit, "sa",
TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
};
PERIPHDRIVER_DECLARE(sa, sadriver);
/* For 2.2-stable support */
#ifndef D_TAPE
#define D_TAPE 0
#endif
static struct cdevsw sa_cdevsw = {
.d_version = D_VERSION,
.d_open = saopen,
.d_close = saclose,
.d_read = physread,
.d_write = physwrite,
.d_ioctl = saioctl,
.d_strategy = sastrategy,
.d_name = "sa",
.d_flags = D_TAPE | D_TRACKCLOSE,
};
static int
saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
int error;
periph = (struct cam_periph *)dev->si_drv1;
if (cam_periph_acquire(periph) != 0) {
return (ENXIO);
}
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
("saopen(%s): softc=0x%x\n", devtoname(dev), softc->flags));
if (SA_IS_CTRL(dev)) {
softc->ctrl_mode = 1;
softc->open_count++;
cam_periph_unlock(periph);
return (0);
}
if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
if (softc->flags & SA_FLAG_OPEN) {
error = EBUSY;
} else if (softc->flags & SA_FLAG_INVALID) {
error = ENXIO;
} else {
/*
* Preserve whether this is a read_only open.
*/
softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
/*
* The function samount ensures media is loaded and ready.
* It also does a device RESERVE if the tape isn't yet mounted.
*
* If the mount fails and this was a non-blocking open,
* make this a 'open_pending_mount' action.
*/
error = samount(periph, flags, dev);
if (error && (flags & O_NONBLOCK)) {
softc->flags |= SA_FLAG_OPEN;
softc->open_pending_mount = 1;
softc->open_count++;
cam_periph_unhold(periph);
cam_periph_unlock(periph);
return (0);
}
}
if (error) {
cam_periph_unhold(periph);
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
saprevent(periph, PR_PREVENT);
softc->flags |= SA_FLAG_OPEN;
softc->open_count++;
cam_periph_unhold(periph);
cam_periph_unlock(periph);
return (error);
}
static int
saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
int mode, error, writing, tmp, i;
int closedbits = SA_FLAG_OPEN;
mode = SAMODE(dev);
periph = (struct cam_periph *)dev->si_drv1;
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
("saclose(%s): softc=0x%x\n", devtoname(dev), softc->flags));
softc->open_rdonly = 0;
if (SA_IS_CTRL(dev)) {
softc->ctrl_mode = 0;
softc->open_count--;
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
if (softc->open_pending_mount) {
softc->flags &= ~SA_FLAG_OPEN;
softc->open_pending_mount = 0;
softc->open_count--;
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
cam_periph_unlock(periph);
return (error);
}
/*
* Were we writing the tape?
*/
writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
/*
* See whether or not we need to write filemarks. If this
* fails, we probably have to assume we've lost tape
* position.
*/
error = sacheckeod(periph);
if (error) {
xpt_print(periph->path,
"failed to write terminating filemark(s)\n");
softc->flags |= SA_FLAG_TAPE_FROZEN;
}
/*
* Whatever we end up doing, allow users to eject tapes from here on.
*/
saprevent(periph, PR_ALLOW);
/*
* Decide how to end...
*/
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
closedbits |= SA_FLAG_TAPE_FROZEN;
} else switch (mode) {
case SA_MODE_OFFLINE:
/*
* An 'offline' close is an unconditional release of
* frozen && mount conditions, irrespective of whether
* these operations succeeded. The reason for this is
* to allow at least some kind of programmatic way
* around our state getting all fouled up. If somebody
* issues an 'offline' command, that will be allowed
* to clear state.
*/
(void) sarewind(periph);
(void) saloadunload(periph, FALSE);
closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
break;
case SA_MODE_REWIND:
/*
* If the rewind fails, return an error- if anyone cares,
* but not overwriting any previous error.
*
* We don't clear the notion of mounted here, but we do
* clear the notion of frozen if we successfully rewound.
*/
tmp = sarewind(periph);
if (tmp) {
if (error != 0)
error = tmp;
} else {
closedbits |= SA_FLAG_TAPE_FROZEN;
}
break;
case SA_MODE_NOREWIND:
/*
* If we're not rewinding/unloading the tape, find out
* whether we need to back up over one of two filemarks
* we wrote (if we wrote two filemarks) so that appends
* from this point on will be sane.
*/
if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
tmp = saspace(periph, -1, SS_FILEMARKS);
if (tmp) {
xpt_print(periph->path, "unable to backspace "
"over one of double filemarks at end of "
"tape\n");
xpt_print(periph->path, "it is possible that "
"this device needs a SA_QUIRK_1FM quirk set"
"for it\n");
softc->flags |= SA_FLAG_TAPE_FROZEN;
}
}
break;
default:
xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
/* NOTREACHED */
break;
}
/*
* We wish to note here that there are no more filemarks to be written.
*/
softc->filemarks = 0;
softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
/*
* And we are no longer open for business.
*/
softc->flags &= ~closedbits;
softc->open_count--;
/*
* Invalidate any density information that depends on having tape
* media in the drive.
*/
for (i = 0; i < SA_DENSITY_TYPES; i++) {
if (softc->density_type_bits[i] & SRDS_MEDIA)
softc->density_info_valid[i] = 0;
}
/*
* Inform users if tape state if frozen....
*/
if (softc->flags & SA_FLAG_TAPE_FROZEN) {
xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
"REWIND or MTEOM command to clear this state.\n");
}
/* release the device if it is no longer mounted */
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
sareservereleaseunit(periph, FALSE);
cam_periph_unhold(periph);
cam_periph_unlock(periph);
cam_periph_release(periph);
return (error);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
static void
sastrategy(struct bio *bp)
{
struct cam_periph *periph;
struct sa_softc *softc;
bp->bio_resid = bp->bio_bcount;
if (SA_IS_CTRL(bp->bio_dev)) {
biofinish(bp, NULL, EINVAL);
return;
}
periph = (struct cam_periph *)bp->bio_dev->si_drv1;
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
if (softc->flags & SA_FLAG_INVALID) {
cam_periph_unlock(periph);
biofinish(bp, NULL, ENXIO);
return;
}
if (softc->flags & SA_FLAG_TAPE_FROZEN) {
cam_periph_unlock(periph);
biofinish(bp, NULL, EPERM);
return;
}
/*
* This should actually never occur as the write(2)
* system call traps attempts to write to a read-only
* file descriptor.
*/
if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
cam_periph_unlock(periph);
biofinish(bp, NULL, EBADF);
return;
}
if (softc->open_pending_mount) {
int error = samount(periph, 0, bp->bio_dev);
if (error) {
cam_periph_unlock(periph);
biofinish(bp, NULL, ENXIO);
return;
}
saprevent(periph, PR_PREVENT);
softc->open_pending_mount = 0;
}
/*
* If it's a null transfer, return immediately
*/
if (bp->bio_bcount == 0) {
cam_periph_unlock(periph);
biodone(bp);
return;
}
/* valid request? */
if (softc->flags & SA_FLAG_FIXED) {
/*
* Fixed block device. The byte count must
* be a multiple of our block size.
*/
if (((softc->blk_mask != ~0) &&
((bp->bio_bcount & softc->blk_mask) != 0)) ||
((softc->blk_mask == ~0) &&
((bp->bio_bcount % softc->min_blk) != 0))) {
xpt_print(periph->path, "Invalid request. Fixed block "
"device requests must be a multiple of %d bytes\n",
softc->min_blk);
cam_periph_unlock(periph);
biofinish(bp, NULL, EINVAL);
return;
}
} else if ((bp->bio_bcount > softc->max_blk) ||
(bp->bio_bcount < softc->min_blk) ||
(bp->bio_bcount & softc->blk_mask) != 0) {
xpt_print_path(periph->path);
printf("Invalid request. Variable block "
"device requests must be ");
if (softc->blk_mask != 0) {
printf("a multiple of %d ", (0x1 << softc->blk_gran));
}
printf("between %d and %d bytes\n", softc->min_blk,
softc->max_blk);
cam_periph_unlock(periph);
biofinish(bp, NULL, EINVAL);
return;
}
/*
* Place it at the end of the queue.
*/
bioq_insert_tail(&softc->bio_queue, bp);
softc->queue_count++;
#if 0
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
(softc->flags & SA_FLAG_FIXED)? "fixed" : "variable",
(bp->bio_cmd == BIO_READ)? "read" : "write"));
#endif
if (softc->queue_count > 1) {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastrategy: queue count now %d\n", softc->queue_count));
}
/*
* Schedule ourselves for performing the work.
*/
xpt_schedule(periph, CAM_PRIORITY_NORMAL);
cam_periph_unlock(periph);
return;
}
static int
sasetsili(struct cam_periph *periph, struct mtparamset *ps, int num_params)
{
uint32_t sili_blocksize;
struct sa_softc *softc;
int error;
error = 0;
softc = (struct sa_softc *)periph->softc;
if (ps->value_type != MT_PARAM_SET_SIGNED) {
snprintf(ps->error_str, sizeof(ps->error_str),
"sili is a signed parameter");
goto bailout;
}
if ((ps->value.value_signed < 0)
|| (ps->value.value_signed > 1)) {
snprintf(ps->error_str, sizeof(ps->error_str),
"invalid sili value %jd", (intmax_t)ps->value.value_signed);
goto bailout_error;
}
/*
* We only set the SILI flag in variable block
* mode. You'll get a check condition in fixed
* block mode if things don't line up in any case.
*/
if (softc->flags & SA_FLAG_FIXED) {
snprintf(ps->error_str, sizeof(ps->error_str),
"can't set sili bit in fixed block mode");
goto bailout_error;
}
if (softc->sili == ps->value.value_signed)
goto bailout;
if (ps->value.value_signed == 1)
sili_blocksize = 4;
else
sili_blocksize = 0;
error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
sili_blocksize, 0, 0, SF_QUIET_IR);
if (error != 0) {
snprintf(ps->error_str, sizeof(ps->error_str),
"sasetparams() returned error %d", error);
goto bailout_error;
}
softc->sili = ps->value.value_signed;
bailout:
ps->status = MT_PARAM_STATUS_OK;
return (error);
bailout_error:
ps->status = MT_PARAM_STATUS_ERROR;
if (error == 0)
error = EINVAL;
return (error);
}
static int
saseteotwarn(struct cam_periph *periph, struct mtparamset *ps, int num_params)
{
struct sa_softc *softc;
int error;
error = 0;
softc = (struct sa_softc *)periph->softc;
if (ps->value_type != MT_PARAM_SET_SIGNED) {
snprintf(ps->error_str, sizeof(ps->error_str),
"eot_warn is a signed parameter");
ps->status = MT_PARAM_STATUS_ERROR;
goto bailout;
}
if ((ps->value.value_signed < 0)
|| (ps->value.value_signed > 1)) {
snprintf(ps->error_str, sizeof(ps->error_str),
"invalid eot_warn value %jd\n",
(intmax_t)ps->value.value_signed);
ps->status = MT_PARAM_STATUS_ERROR;
goto bailout;
}
softc->eot_warn = ps->value.value_signed;
ps->status = MT_PARAM_STATUS_OK;
bailout:
if (ps->status != MT_PARAM_STATUS_OK)
error = EINVAL;
return (error);
}
static void
safillprot(struct sa_softc *softc, int *indent, struct sbuf *sb)
{
int tmpint;
SASBADDNODE(sb, *indent, protection);
if (softc->flags & SA_FLAG_PROTECT_SUPP)
tmpint = 1;
else
tmpint = 0;
SASBADDINTDESC(sb, *indent, tmpint, %d, protection_supported,
"Set to 1 if protection information is supported");
if ((tmpint != 0)
&& (softc->prot_info.cur_prot_state.initialized != 0)) {
struct sa_prot_state *prot;
prot = &softc->prot_info.cur_prot_state;
SASBADDUINTDESC(sb, *indent, prot->prot_method, %u,
prot_method, "Current Protection Method");
SASBADDUINTDESC(sb, *indent, prot->pi_length, %u,
pi_length, "Length of Protection Information");
SASBADDUINTDESC(sb, *indent, prot->lbp_w, %u,
lbp_w, "Check Protection on Writes");
SASBADDUINTDESC(sb, *indent, prot->lbp_r, %u,
lbp_r, "Check and Include Protection on Reads");
SASBADDUINTDESC(sb, *indent, prot->rbdp, %u,
rbdp, "Transfer Protection Information for RECOVER "
"BUFFERED DATA command");
}
SASBENDNODE(sb, *indent, protection);
}
static void
sapopulateprots(struct sa_prot_state *cur_state, struct sa_prot_map *new_table,
int table_ents)
{
int i;
bcopy(sa_prot_table, new_table, min(table_ents * sizeof(*new_table),
sizeof(sa_prot_table)));
table_ents = min(table_ents, SA_NUM_PROT_ENTS);
for (i = 0; i < table_ents; i++)
new_table[i].value = (uint32_t *)((uint8_t *)cur_state +
new_table[i].offset);
return;
}
static struct sa_prot_map *
safindprotent(char *name, struct sa_prot_map *table, int table_ents)
{
char *prot_name = "protection.";
int i, prot_len;
prot_len = strlen(prot_name);
/*
* This shouldn't happen, but we check just in case.
*/
if (strncmp(name, prot_name, prot_len) != 0)
goto bailout;
for (i = 0; i < table_ents; i++) {
if (strcmp(&name[prot_len], table[i].name) != 0)
continue;
return (&table[i]);
}
bailout:
return (NULL);
}
static int
sasetprotents(struct cam_periph *periph, struct mtparamset *ps, int num_params)
{
struct sa_softc *softc;
struct sa_prot_map prot_ents[SA_NUM_PROT_ENTS];
struct sa_prot_state new_state;
int error;
int i;
softc = (struct sa_softc *)periph->softc;
error = 0;
/*
* Make sure that this tape drive supports protection information.
* Otherwise we can't set anything.
*/
if ((softc->flags & SA_FLAG_PROTECT_SUPP) == 0) {
snprintf(ps[0].error_str, sizeof(ps[0].error_str),
"Protection information is not supported for this device");
ps[0].status = MT_PARAM_STATUS_ERROR;
goto bailout;
}
/*
* We can't operate with physio(9) splitting enabled, because there
* is no way to insure (especially in variable block mode) that
* what the user writes (with a checksum block at the end) will
* make it into the sa(4) driver intact.
*/
if ((softc->si_flags & SI_NOSPLIT) == 0) {
snprintf(ps[0].error_str, sizeof(ps[0].error_str),
"Protection information cannot be enabled with I/O "
"splitting");
ps[0].status = MT_PARAM_STATUS_ERROR;
goto bailout;
}
/*
* Take the current cached protection state and use that as the
* basis for our new entries.
*/
bcopy(&softc->prot_info.cur_prot_state, &new_state, sizeof(new_state));
/*
* Populate the table mapping property names to pointers into the
* state structure.
*/
sapopulateprots(&new_state, prot_ents, SA_NUM_PROT_ENTS);
/*
* For each parameter the user passed in, make sure the name, type
* and value are valid.
*/
for (i = 0; i < num_params; i++) {
struct sa_prot_map *ent;
ent = safindprotent(ps[i].value_name, prot_ents,
SA_NUM_PROT_ENTS);
if (ent == NULL) {
ps[i].status = MT_PARAM_STATUS_ERROR;
snprintf(ps[i].error_str, sizeof(ps[i].error_str),
"Invalid protection entry name %s",
ps[i].value_name);
error = EINVAL;
goto bailout;
}
if (ent->param_type != ps[i].value_type) {
ps[i].status = MT_PARAM_STATUS_ERROR;
snprintf(ps[i].error_str, sizeof(ps[i].error_str),
"Supplied type %d does not match actual type %d",
ps[i].value_type, ent->param_type);
error = EINVAL;
goto bailout;
}
if ((ps[i].value.value_unsigned < ent->min_val)
|| (ps[i].value.value_unsigned > ent->max_val)) {
ps[i].status = MT_PARAM_STATUS_ERROR;
snprintf(ps[i].error_str, sizeof(ps[i].error_str),
"Value %ju is outside valid range %u - %u",
(uintmax_t)ps[i].value.value_unsigned, ent->min_val,
ent->max_val);
error = EINVAL;
goto bailout;
}
*(ent->value) = ps[i].value.value_unsigned;
}
/*
* Actually send the protection settings to the drive.
*/
error = sasetprot(periph, &new_state);
if (error != 0) {
for (i = 0; i < num_params; i++) {
ps[i].status = MT_PARAM_STATUS_ERROR;
snprintf(ps[i].error_str, sizeof(ps[i].error_str),
"Unable to set parameter, see dmesg(8)");
}
goto bailout;
}
/*
* Let the user know that his settings were stored successfully.
*/
for (i = 0; i < num_params; i++)
ps[i].status = MT_PARAM_STATUS_OK;
bailout:
return (error);
}
/*
* Entry handlers generally only handle a single entry. Node handlers will
* handle a contiguous range of parameters to set in a single call.
*/
typedef enum {
SA_PARAM_TYPE_ENTRY,
SA_PARAM_TYPE_NODE
} sa_param_type;
struct sa_param_ent {
char *name;
sa_param_type param_type;
int (*set_func)(struct cam_periph *periph, struct mtparamset *ps,
int num_params);
} sa_param_table[] = {
{"sili", SA_PARAM_TYPE_ENTRY, sasetsili },
{"eot_warn", SA_PARAM_TYPE_ENTRY, saseteotwarn },
{"protection.", SA_PARAM_TYPE_NODE, sasetprotents }
};
static struct sa_param_ent *
safindparament(struct mtparamset *ps)
{
unsigned int i;
for (i = 0; i < nitems(sa_param_table); i++){
/*
* For entries, we compare all of the characters. For
* nodes, we only compare the first N characters. The node
* handler will decode the rest.
*/
if (sa_param_table[i].param_type == SA_PARAM_TYPE_ENTRY) {
if (strcmp(ps->value_name, sa_param_table[i].name) != 0)
continue;
} else {
if (strncmp(ps->value_name, sa_param_table[i].name,
strlen(sa_param_table[i].name)) != 0)
continue;
}
return (&sa_param_table[i]);
}
return (NULL);
}
/*
* Go through a list of parameters, coalescing contiguous parameters with
* the same parent node into a single call to a set_func.
*/
static int
saparamsetlist(struct cam_periph *periph, struct mtsetlist *list,
int need_copy)
{
int i, contig_ents;
int error;
struct mtparamset *params, *first;
struct sa_param_ent *first_ent;
error = 0;
params = NULL;
if (list->num_params == 0)
/* Nothing to do */
goto bailout;
/*
* Verify that the user has the correct structure size.
*/
if ((list->num_params * sizeof(struct mtparamset)) !=
list->param_len) {
xpt_print(periph->path, "%s: length of params %d != "
"sizeof(struct mtparamset) %zd * num_params %d\n",
__func__, list->param_len, sizeof(struct mtparamset),
list->num_params);
error = EINVAL;
goto bailout;
}
if (need_copy != 0) {
/*
* XXX KDM will dropping the lock cause an issue here?
*/
cam_periph_unlock(periph);
params = malloc(list->param_len, M_SCSISA, M_WAITOK | M_ZERO);
error = copyin(list->params, params, list->param_len);
cam_periph_lock(periph);
if (error != 0)
goto bailout;
} else {
params = list->params;
}
contig_ents = 0;
first = NULL;
first_ent = NULL;
for (i = 0; i < list->num_params; i++) {
struct sa_param_ent *ent;
ent = safindparament(&params[i]);
if (ent == NULL) {
snprintf(params[i].error_str,
sizeof(params[i].error_str),
"%s: cannot find parameter %s", __func__,
params[i].value_name);
params[i].status = MT_PARAM_STATUS_ERROR;
break;
}
if (first != NULL) {
if (first_ent == ent) {
/*
* We're still in a contiguous list of
* parameters that can be handled by one
* node handler.
*/
contig_ents++;
continue;
} else {
error = first_ent->set_func(periph, first,
contig_ents);
first = NULL;
first_ent = NULL;
contig_ents = 0;
if (error != 0) {
error = 0;
break;
}
}
}
if (ent->param_type == SA_PARAM_TYPE_NODE) {
first = &params[i];
first_ent = ent;
contig_ents = 1;
} else {
error = ent->set_func(periph, &params[i], 1);
if (error != 0) {
error = 0;
break;
}
}
}
if (first != NULL)
first_ent->set_func(periph, first, contig_ents);
bailout:
if (need_copy != 0) {
if (error != EFAULT) {
cam_periph_unlock(periph);
copyout(params, list->params, list->param_len);
cam_periph_lock(periph);
}
free(params, M_SCSISA);
}
return (error);
}
static int
sagetparams_common(struct cdev *dev, struct cam_periph *periph)
{
struct sa_softc *softc;
u_int8_t write_protect;
int comp_enabled, comp_supported, error;
softc = (struct sa_softc *)periph->softc;
if (softc->open_pending_mount)
return (0);
/* The control device may issue getparams() if there are no opens. */
if (SA_IS_CTRL(dev) && (softc->flags & SA_FLAG_OPEN) != 0)
return (0);
error = sagetparams(periph, SA_PARAM_ALL, &softc->media_blksize,
&softc->media_density, &softc->media_numblks, &softc->buffer_mode,
&write_protect, &softc->speed, &comp_supported, &comp_enabled,
&softc->comp_algorithm, NULL, NULL, 0, 0);
if (error)
return (error);
if (write_protect)
softc->flags |= SA_FLAG_TAPE_WP;
else
softc->flags &= ~SA_FLAG_TAPE_WP;
softc->flags &= ~SA_FLAG_COMPRESSION;
if (comp_supported) {
if (softc->saved_comp_algorithm == 0)
softc->saved_comp_algorithm =
softc->comp_algorithm;
softc->flags |= SA_FLAG_COMP_SUPP;
if (comp_enabled)
softc->flags |= SA_FLAG_COMP_ENABLED;
} else
softc->flags |= SA_FLAG_COMP_UNSUPP;
return (0);
}
#define PENDING_MOUNT_CHECK(softc, periph, dev) \
if (softc->open_pending_mount) { \
error = samount(periph, 0, dev); \
if (error) { \
break; \
} \
saprevent(periph, PR_PREVENT); \
softc->open_pending_mount = 0; \
}
static int
saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
{
struct cam_periph *periph;
struct sa_softc *softc;
scsi_space_code spaceop;
int didlockperiph = 0;
int mode;
int error = 0;
mode = SAMODE(dev);
error = 0; /* shut up gcc */
spaceop = 0; /* shut up gcc */
periph = (struct cam_periph *)dev->si_drv1;
cam_periph_lock(periph);
softc = (struct sa_softc *)periph->softc;
/*
* Check for control mode accesses. We allow MTIOCGET and
* MTIOCERRSTAT (but need to be the only one open in order
* to clear latched status), and MTSETBSIZE, MTSETDNSTY
* and MTCOMP (but need to be the only one accessing this
* device to run those).
*/
if (SA_IS_CTRL(dev)) {
switch (cmd) {
case MTIOCGETEOTMODEL:
case MTIOCGET:
case MTIOCEXTGET:
case MTIOCPARAMGET:
case MTIOCRBLIM:
break;
case MTIOCERRSTAT:
/*
* If the periph isn't already locked, lock it
* so our MTIOCERRSTAT can reset latched error stats.
*
* If the periph is already locked, skip it because
* we're just getting status and it'll be up to the
* other thread that has this device open to do
* an MTIOCERRSTAT that would clear latched status.
*/
if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
error = cam_periph_hold(periph, PRIBIO|PCATCH);
if (error != 0) {
cam_periph_unlock(periph);
return (error);
}
didlockperiph = 1;
}
break;
case MTIOCTOP:
{
struct mtop *mt = (struct mtop *) arg;
/*
* Check to make sure it's an OP we can perform
* with no media inserted.
*/
switch (mt->mt_op) {
case MTSETBSIZ:
case MTSETDNSTY:
case MTCOMP:
mt = NULL;
/* FALLTHROUGH */
default:
break;
}
if (mt != NULL) {
break;
}
/* FALLTHROUGH */
}
case MTIOCSETEOTMODEL:
/*
* We need to acquire the peripheral here rather
* than at open time because we are sharing writable
* access to data structures.
*/
error = cam_periph_hold(periph, PRIBIO|PCATCH);
if (error != 0) {
cam_periph_unlock(periph);
return (error);
}
didlockperiph = 1;
break;
default:
cam_periph_unlock(periph);
return (EINVAL);
}
}
/*
* Find the device that the user is talking about
*/
switch (cmd) {
case MTIOCGET:
{
struct mtget *g = (struct mtget *)arg;
error = sagetparams_common(dev, periph);
if (error)
break;
bzero(g, sizeof(struct mtget));
g->mt_type = MT_ISAR;
if (softc->flags & SA_FLAG_COMP_UNSUPP) {
g->mt_comp = MT_COMP_UNSUPP;
g->mt_comp0 = MT_COMP_UNSUPP;
g->mt_comp1 = MT_COMP_UNSUPP;
g->mt_comp2 = MT_COMP_UNSUPP;
g->mt_comp3 = MT_COMP_UNSUPP;
} else {
if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
g->mt_comp = MT_COMP_DISABLED;
} else {
g->mt_comp = softc->comp_algorithm;
}
g->mt_comp0 = softc->comp_algorithm;
g->mt_comp1 = softc->comp_algorithm;
g->mt_comp2 = softc->comp_algorithm;
g->mt_comp3 = softc->comp_algorithm;
}
g->mt_density = softc->media_density;
g->mt_density0 = softc->media_density;
g->mt_density1 = softc->media_density;
g->mt_density2 = softc->media_density;
g->mt_density3 = softc->media_density;
g->mt_blksiz = softc->media_blksize;
g->mt_blksiz0 = softc->media_blksize;
g->mt_blksiz1 = softc->media_blksize;
g->mt_blksiz2 = softc->media_blksize;
g->mt_blksiz3 = softc->media_blksize;
g->mt_fileno = softc->fileno;
g->mt_blkno = softc->blkno;
g->mt_dsreg = (short) softc->dsreg;
/*
* Yes, we know that this is likely to overflow
*/
if (softc->last_resid_was_io) {
if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
softc->last_io_resid = 0;
}
}
} else {
if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
softc->last_ctl_resid = 0;
}
}
}
error = 0;
break;
}
case MTIOCEXTGET:
case MTIOCPARAMGET:
{
struct mtextget *g = (struct mtextget *)arg;
char *tmpstr2;
struct sbuf *sb;
/*
* Report drive status using an XML format.
*/
/*
* XXX KDM will dropping the lock cause any problems here?
*/
cam_periph_unlock(periph);
sb = sbuf_new(NULL, NULL, g->alloc_len, SBUF_FIXEDLEN);
if (sb == NULL) {
g->status = MT_EXT_GET_ERROR;
snprintf(g->error_str, sizeof(g->error_str),
"Unable to allocate %d bytes for status info",
g->alloc_len);
cam_periph_lock(periph);
goto extget_bailout;
}
cam_periph_lock(periph);
if (cmd == MTIOCEXTGET)
error = saextget(dev, periph, sb, g);
else
error = saparamget(softc, sb);
if (error != 0)
goto extget_bailout;
error = sbuf_finish(sb);
if (error == ENOMEM) {
g->status = MT_EXT_GET_NEED_MORE_SPACE;
error = 0;
} else if (error != 0) {
g->status = MT_EXT_GET_ERROR;
snprintf(g->error_str, sizeof(g->error_str),
"Error %d returned from sbuf_finish()", error);
} else
g->status = MT_EXT_GET_OK;
error = 0;
tmpstr2 = sbuf_data(sb);
g->fill_len = strlen(tmpstr2) + 1;
cam_periph_unlock(periph);
error = copyout(tmpstr2, g->status_xml, g->fill_len);
cam_periph_lock(periph);
extget_bailout:
sbuf_delete(sb);
break;
}
case MTIOCPARAMSET:
{
struct mtsetlist list;
struct mtparamset *ps = (struct mtparamset *)arg;
bzero(&list, sizeof(list));
list.num_params = 1;
list.param_len = sizeof(*ps);
list.params = ps;
error = saparamsetlist(periph, &list, /*need_copy*/ 0);
break;
}
case MTIOCSETLIST:
{
struct mtsetlist *list = (struct mtsetlist *)arg;
error = saparamsetlist(periph, list, /*need_copy*/ 1);
break;
}
case MTIOCERRSTAT:
{
struct scsi_tape_errors *sep =
&((union mterrstat *)arg)->scsi_errstat;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("saioctl: MTIOCERRSTAT\n"));
bzero(sep, sizeof(*sep));
sep->io_resid = softc->last_io_resid;
bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
sizeof (sep->io_sense));
bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
sizeof (sep->io_cdb));
sep->ctl_resid = softc->last_ctl_resid;
bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
sizeof (sep->ctl_sense));
bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
sizeof (sep->ctl_cdb));
if ((SA_IS_CTRL(dev) == 0 && !softc->open_pending_mount) ||
didlockperiph)
bzero((caddr_t) &softc->errinfo,
sizeof (softc->errinfo));
error = 0;
break;
}
case MTIOCTOP:
{
struct mtop *mt;
int count;
PENDING_MOUNT_CHECK(softc, periph, dev);
mt = (struct mtop *)arg;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("saioctl: op=0x%x count=0x%x\n",
mt->mt_op, mt->mt_count));
count = mt->mt_count;
switch (mt->mt_op) {
case MTWEOF: /* write an end-of-file marker */
/*
* We don't need to clear the SA_FLAG_TAPE_WRITTEN
* flag because by keeping track of filemarks
* we have last written we know whether or not
* we need to write more when we close the device.
*/
error = sawritefilemarks(periph, count, FALSE, FALSE);
break;
case MTWEOFI:
/* write an end-of-file marker without waiting */
error = sawritefilemarks(periph, count, FALSE, TRUE);
break;
case MTWSS: /* write a setmark */
error = sawritefilemarks(periph, count, TRUE, FALSE);
break;
case MTBSR: /* backward space record */
case MTFSR: /* forward space record */
case MTBSF: /* backward space file */
case MTFSF: /* forward space file */
case MTBSS: /* backward space setmark */
case MTFSS: /* forward space setmark */
case MTEOD: /* space to end of recorded medium */
{
int nmarks;
spaceop = SS_FILEMARKS;
nmarks = softc->filemarks;
error = sacheckeod(periph);
if (error) {
xpt_print(periph->path,
"EOD check prior to spacing failed\n");
softc->flags |= SA_FLAG_EIO_PENDING;
break;
}
nmarks -= softc->filemarks;
switch(mt->mt_op) {
case MTBSR:
count = -count;
/* FALLTHROUGH */
case MTFSR:
spaceop = SS_BLOCKS;
break;
case MTBSF:
count = -count;
/* FALLTHROUGH */
case MTFSF:
break;
case MTBSS:
count = -count;
/* FALLTHROUGH */
case MTFSS:
spaceop = SS_SETMARKS;
break;
case MTEOD:
spaceop = SS_EOD;
count = 0;
nmarks = 0;
break;
default:
error = EINVAL;
break;
}
if (error)
break;
nmarks = softc->filemarks;
/*
* XXX: Why are we checking again?
*/
error = sacheckeod(periph);
if (error)
break;
nmarks -= softc->filemarks;
error = saspace(periph, count - nmarks, spaceop);
/*
* At this point, clear that we've written the tape
* and that we've written any filemarks. We really
* don't know what the applications wishes to do next-
* the sacheckeod's will make sure we terminated the
* tape correctly if we'd been writing, but the next
* action the user application takes will set again
* whether we need to write filemarks.
*/
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->filemarks = 0;
break;
}
case MTREW: /* rewind */
PENDING_MOUNT_CHECK(softc, periph, dev);
(void) sacheckeod(periph);
error = sarewind(periph);
/* see above */
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
softc->filemarks = 0;
break;
case MTERASE: /* erase */
PENDING_MOUNT_CHECK(softc, periph, dev);
error = saerase(periph, count);
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
break;
case MTRETENS: /* re-tension tape */
PENDING_MOUNT_CHECK(softc, periph, dev);
error = saretension(periph);
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
break;
case MTOFFL: /* rewind and put the drive offline */
PENDING_MOUNT_CHECK(softc, periph, dev);
(void) sacheckeod(periph);
/* see above */
softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
softc->filemarks = 0;
error = sarewind(periph);
/* clear the frozen flag anyway */
softc->flags &= ~SA_FLAG_TAPE_FROZEN;
/*
* Be sure to allow media removal before ejecting.
*/
saprevent(periph, PR_ALLOW);
if (error == 0) {
error = saloadunload(periph, FALSE);
if (error == 0) {
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
}
}
break;
case MTLOAD:
error = saloadunload(periph, TRUE);
break;
case MTNOP: /* no operation, sets status only */
case MTCACHE: /* enable controller cache */
case MTNOCACHE: /* disable controller cache */
error = 0;
break;
case MTSETBSIZ: /* Set block size for device */
PENDING_MOUNT_CHECK(softc, periph, dev);
if ((softc->sili != 0)
&& (count != 0)) {
xpt_print(periph->path, "Can't enter fixed "
"block mode with SILI enabled\n");
error = EINVAL;
break;
}
error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
0, 0, 0);
if (error == 0) {
softc->last_media_blksize =
softc->media_blksize;
softc->media_blksize = count;
if (count) {
softc->flags |= SA_FLAG_FIXED;
if (powerof2(count)) {
softc->blk_shift =
ffs(count) - 1;
softc->blk_mask = count - 1;
} else {
softc->blk_mask = ~0;
softc->blk_shift = 0;
}
/*
* Make the user's desire 'persistent'.
*/
softc->quirks &= ~SA_QUIRK_VARIABLE;
softc->quirks |= SA_QUIRK_FIXED;
} else {
softc->flags &= ~SA_FLAG_FIXED;
if (softc->max_blk == 0) {
softc->max_blk = ~0;
}
softc->blk_shift = 0;
if (softc->blk_gran != 0) {
softc->blk_mask =
softc->blk_gran - 1;
} else {
softc->blk_mask = 0;
}
/*
* Make the user's desire 'persistent'.
*/
softc->quirks |= SA_QUIRK_VARIABLE;
softc->quirks &= ~SA_QUIRK_FIXED;
}
}
break;
case MTSETDNSTY: /* Set density for device and mode */
PENDING_MOUNT_CHECK(softc, periph, dev);
if (count > UCHAR_MAX) {
error = EINVAL;
break;
} else {
error = sasetparams(periph, SA_PARAM_DENSITY,
0, count, 0, 0);
}
break;
case MTCOMP: /* enable compression */
PENDING_MOUNT_CHECK(softc, periph, dev);
/*
* Some devices don't support compression, and
* don't like it if you ask them for the
* compression page.
*/
if ((softc->quirks & SA_QUIRK_NOCOMP) ||
(softc->flags & SA_FLAG_COMP_UNSUPP)) {
error = ENODEV;
break;
}
error = sasetparams(periph, SA_PARAM_COMPRESSION,
0, 0, count, SF_NO_PRINT);
break;
default:
error = EINVAL;
}
break;
}
case MTIOCIEOT:
case MTIOCEEOT:
error = 0;
break;
case MTIOCRDSPOS:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sardpos(periph, 0, (u_int32_t *) arg);
break;
case MTIOCRDHPOS:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sardpos(periph, 1, (u_int32_t *) arg);
break;
case MTIOCSLOCATE:
case MTIOCHLOCATE: {
struct mtlocate locate_info;
int hard;
bzero(&locate_info, sizeof(locate_info));
locate_info.logical_id = *((uint32_t *)arg);
if (cmd == MTIOCSLOCATE)
hard = 0;
else
hard = 1;
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sasetpos(periph, hard, &locate_info);
break;
}
case MTIOCEXTLOCATE:
PENDING_MOUNT_CHECK(softc, periph, dev);
error = sasetpos(periph, /*hard*/ 0, (struct mtlocate *)arg);
softc->flags &=
~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
softc->flags &= ~SA_FLAG_ERR_PENDING;
softc->filemarks = 0;
break;
case MTIOCGETEOTMODEL:
error = 0;
if (softc->quirks & SA_QUIRK_1FM)
mode = 1;
else
mode = 2;
*((u_int32_t *) arg) = mode;
break;
case MTIOCSETEOTMODEL:
error = 0;
switch (*((u_int32_t *) arg)) {
case 1:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_1FM;
break;
case 2:
softc->quirks &= ~SA_QUIRK_1FM;
softc->quirks |= SA_QUIRK_2FM;
break;
default:
error = EINVAL;
break;
}
break;
case MTIOCRBLIM: {
struct mtrblim *rblim;
rblim = (struct mtrblim *)arg;
rblim->granularity = softc->blk_gran;
rblim->min_block_length = softc->min_blk;
rblim->max_block_length = softc->max_blk;
break;
}
default:
error = cam_periph_ioctl(periph, cmd, arg, saerror);
break;
}
/*
* Check to see if we cleared a frozen state
*/
if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
switch(cmd) {
case MTIOCRDSPOS:
case MTIOCRDHPOS:
case MTIOCSLOCATE:
case MTIOCHLOCATE:
/*
* XXX KDM look at this.
*/
softc->fileno = (daddr_t) -1;
softc->blkno = (daddr_t) -1;
softc->rep_blkno = (daddr_t) -1;
softc->rep_fileno = (daddr_t) -1;
softc->partition = (daddr_t) -1;
softc->flags &= ~SA_FLAG_TAPE_FROZEN;
xpt_print(periph->path,
"tape state now unfrozen.\n");
break;
default:
break;
}
}
if (didlockperiph) {
cam_periph_unhold(periph);
}
cam_periph_unlock(periph);
return (error);
}
static void
sainit(void)
{
cam_status status;
/*
* Install a global async callback.
*/
status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("sa: Failed to attach master async callback "
"due to status 0x%x!\n", status);
}
}
static void
sadevgonecb(void *arg)
{
struct cam_periph *periph;
struct mtx *mtx;
struct sa_softc *softc;
periph = (struct cam_periph *)arg;
softc = (struct sa_softc *)periph->softc;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
softc->num_devs_to_destroy--;
if (softc->num_devs_to_destroy == 0) {
int i;
/*
* When we have gotten all of our callbacks, we will get
* no more close calls from devfs. So if we have any
* dangling opens, we need to release the reference held
* for that particular context.
*/
for (i = 0; i < softc->open_count; i++)
cam_periph_release_locked(periph);
softc->open_count = 0;
/*
* Release the reference held for devfs, all of our
* instances are gone now.
*/
cam_periph_release_locked(periph);
}
/*
* We reference the lock directly here, instead of using
* cam_periph_unlock(). The reason is that the final call to
* cam_periph_release_locked() above could result in the periph
* getting freed. If that is the case, dereferencing the periph
* with a cam_periph_unlock() call would cause a page fault.
*/
mtx_unlock(mtx);
}
static void
saoninvalidate(struct cam_periph *periph)
{
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_register_async(0, saasync, periph, periph->path);
softc->flags |= SA_FLAG_INVALID;
/*
* Return all queued I/O with ENXIO.
* XXX Handle any transactions queued to the card
* with XPT_ABORT_CCB.
*/
bioq_flush(&softc->bio_queue, NULL, ENXIO);
softc->queue_count = 0;
/*
* Tell devfs that all of our devices have gone away, and ask for a
* callback when it has cleaned up its state.
*/
destroy_dev_sched_cb(softc->devs.ctl_dev, sadevgonecb, periph);
destroy_dev_sched_cb(softc->devs.r_dev, sadevgonecb, periph);
destroy_dev_sched_cb(softc->devs.nr_dev, sadevgonecb, periph);
destroy_dev_sched_cb(softc->devs.er_dev, sadevgonecb, periph);
}
static void
sacleanup(struct cam_periph *periph)
{
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
cam_periph_unlock(periph);
if ((softc->flags & SA_FLAG_SCTX_INIT) != 0
&& sysctl_ctx_free(&softc->sysctl_ctx) != 0)
xpt_print(periph->path, "can't remove sysctl context\n");
cam_periph_lock(periph);
devstat_remove_entry(softc->device_stats);
free(softc, M_SCSISA);
}
static void
saasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg)
{
struct cam_periph *periph;
periph = (struct cam_periph *)callback_arg;
switch (code) {
case AC_FOUND_DEVICE:
{
struct ccb_getdev *cgd;
cam_status status;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL)
break;
if (cgd->protocol != PROTO_SCSI)
break;
if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
break;
if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(saregister, saoninvalidate,
sacleanup, sastart,
"sa", CAM_PERIPH_BIO, path,
saasync, AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("saasync: Unable to probe new device "
"due to status 0x%x\n", status);
break;
}
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static void
sasetupdev(struct sa_softc *softc, struct cdev *dev)
{
dev->si_iosize_max = softc->maxio;
dev->si_flags |= softc->si_flags;
/*
* Keep a count of how many non-alias devices we have created,
* so we can make sure we clean them all up on shutdown. Aliases
* are cleaned up when we destroy the device they're an alias for.
*/
if ((dev->si_flags & SI_ALIAS) == 0)
softc->num_devs_to_destroy++;
}
static void
sasysctlinit(void *context, int pending)
{
struct cam_periph *periph;
struct sa_softc *softc;
char tmpstr[32], tmpstr2[16];
periph = (struct cam_periph *)context;
/*
* If the periph is invalid, no need to setup the sysctls.
*/
if (periph->flags & CAM_PERIPH_INVALID)
goto bailout;
softc = (struct sa_softc *)periph->softc;
snprintf(tmpstr, sizeof(tmpstr), "CAM SA unit %d", periph->unit_number);
snprintf(tmpstr2, sizeof(tmpstr2), "%u", periph->unit_number);
sysctl_ctx_init(&softc->sysctl_ctx);
softc->flags |= SA_FLAG_SCTX_INIT;
softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_kern_cam_sa), OID_AUTO, tmpstr2,
CTLFLAG_RD, 0, tmpstr, "device_index");
if (softc->sysctl_tree == NULL)
goto bailout;
SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO, "allow_io_split", CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
&softc->allow_io_split, 0, "Allow Splitting I/O");
SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO, "maxio", CTLFLAG_RD,
&softc->maxio, 0, "Maximum I/O size");
SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO, "cpi_maxio", CTLFLAG_RD,
&softc->cpi_maxio, 0, "Maximum Controller I/O size");
SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
OID_AUTO, "inject_eom", CTLFLAG_RW,
&softc->inject_eom, 0, "Queue EOM for the next write/read");
bailout:
/*
* Release the reference that was held when this task was enqueued.
*/
cam_periph_release(periph);
}
static cam_status
saregister(struct cam_periph *periph, void *arg)
{
struct sa_softc *softc;
struct ccb_getdev *cgd;
struct ccb_pathinq cpi;
struct make_dev_args args;
caddr_t match;
char tmpstr[80];
int error;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL) {
printf("saregister: no getdev CCB, can't register device\n");
return (CAM_REQ_CMP_ERR);
}
softc = (struct sa_softc *)
malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
if (softc == NULL) {
printf("saregister: Unable to probe new device. "
"Unable to allocate softc\n");
return (CAM_REQ_CMP_ERR);
}
softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
softc->state = SA_STATE_NORMAL;
softc->fileno = (daddr_t) -1;
softc->blkno = (daddr_t) -1;
softc->rep_fileno = (daddr_t) -1;
softc->rep_blkno = (daddr_t) -1;
softc->partition = (daddr_t) -1;
softc->bop = -1;
softc->eop = -1;
softc->bpew = -1;
bioq_init(&softc->bio_queue);
softc->periph = periph;
periph->softc = softc;
/*
* See if this device has any quirks.
*/
match = cam_quirkmatch((caddr_t)&cgd->inq_data,
(caddr_t)sa_quirk_table,
nitems(sa_quirk_table),
sizeof(*sa_quirk_table), scsi_inquiry_match);
if (match != NULL) {
softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
softc->last_media_blksize =
((struct sa_quirk_entry *)match)->prefblk;
} else
softc->quirks = SA_QUIRK_NONE;
/*
* Long format data for READ POSITION was introduced in SSC, which
* was after SCSI-2. (Roughly equivalent to SCSI-3.) If the drive
* reports that it is SCSI-2 or older, it is unlikely to support
* long position data, but it might. Some drives from that era
* claim to be SCSI-2, but do support long position information.
* So, instead of immediately disabling long position information
* for SCSI-2 devices, we'll try one pass through sagetpos(), and
* then disable long position information if we get an error.
*/
if (cgd->inq_data.version <= SCSI_REV_CCS)
softc->quirks |= SA_QUIRK_NO_LONG_POS;
if (cgd->inq_data.spc3_flags & SPC3_SID_PROTECT) {
struct ccb_dev_advinfo cdai;
struct scsi_vpd_extended_inquiry_data ext_inq;
bzero(&ext_inq, sizeof(ext_inq));
xpt_setup_ccb(&cdai.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
cdai.flags = CDAI_FLAG_NONE;
cdai.buftype = CDAI_TYPE_EXT_INQ;
cdai.bufsiz = sizeof(ext_inq);
cdai.buf = (uint8_t *)&ext_inq;
xpt_action((union ccb *)&cdai);
if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
if ((cdai.ccb_h.status == CAM_REQ_CMP)
&& (ext_inq.flags1 & SVPD_EID_SA_SPT_LBP))
softc->flags |= SA_FLAG_PROTECT_SUPP;
}
xpt_path_inq(&cpi, periph->path);
/*
* The SA driver supports a blocksize, but we don't know the
* blocksize until we media is inserted. So, set a flag to
* indicate that the blocksize is unavailable right now.
*/
cam_periph_unlock(periph);
softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_TAPE);
/*
* Load the default value that is either compiled in, or loaded
* in the global kern.cam.sa.allow_io_split tunable.
*/
softc->allow_io_split = sa_allow_io_split;
/*
* Load a per-instance tunable, if it exists. NOTE that this
* tunable WILL GO AWAY in FreeBSD 11.0.
*/
snprintf(tmpstr, sizeof(tmpstr), "kern.cam.sa.%u.allow_io_split",
periph->unit_number);
TUNABLE_INT_FETCH(tmpstr, &softc->allow_io_split);
/*
* If maxio isn't set, we fall back to DFLTPHYS. Otherwise we take
* the smaller of cpi.maxio or MAXPHYS.
*/
if (cpi.maxio == 0)
softc->maxio = DFLTPHYS;
else if (cpi.maxio > MAXPHYS)
softc->maxio = MAXPHYS;
else
softc->maxio = cpi.maxio;
/*
* Record the controller's maximum I/O size so we can report it to
* the user later.
*/
softc->cpi_maxio = cpi.maxio;
/*
* By default we tell physio that we do not want our I/O split.
* The user needs to have a 1:1 mapping between the size of his
* write to a tape character device and the size of the write
* that actually goes down to the drive.
*/
if (softc->allow_io_split == 0)
softc->si_flags = SI_NOSPLIT;
else
softc->si_flags = 0;
TASK_INIT(&softc->sysctl_task, 0, sasysctlinit, periph);
/*
* If the SIM supports unmapped I/O, let physio know that we can
* handle unmapped buffers.
*/
if (cpi.hba_misc & PIM_UNMAPPED)
softc->si_flags |= SI_UNMAPPED;
/*
* Acquire a reference to the periph before we create the devfs
* instances for it. We'll release this reference once the devfs
* instances have been freed.
*/
if (cam_periph_acquire(periph) != 0) {
xpt_print(periph->path, "%s: lost periph during "
"registration!\n", __func__);
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
make_dev_args_init(&args);
args.mda_devsw = &sa_cdevsw;
args.mda_si_drv1 = softc->periph;
args.mda_uid = UID_ROOT;
args.mda_gid = GID_OPERATOR;
args.mda_mode = 0660;
args.mda_unit = SAMINOR(SA_CTLDEV, SA_ATYPE_R);
error = make_dev_s(&args, &softc->devs.ctl_dev, "%s%d.ctl",
periph->periph_name, periph->unit_number);
if (error != 0) {
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
sasetupdev(softc, softc->devs.ctl_dev);
args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_R);
error = make_dev_s(&args, &softc->devs.r_dev, "%s%d",
periph->periph_name, periph->unit_number);
if (error != 0) {
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
sasetupdev(softc, softc->devs.r_dev);
args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_NR);
error = make_dev_s(&args, &softc->devs.nr_dev, "n%s%d",
periph->periph_name, periph->unit_number);
if (error != 0) {
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
sasetupdev(softc, softc->devs.nr_dev);
args.mda_unit = SAMINOR(SA_NOT_CTLDEV, SA_ATYPE_ER);
error = make_dev_s(&args, &softc->devs.er_dev, "e%s%d",
periph->periph_name, periph->unit_number);
if (error != 0) {
cam_periph_lock(periph);
return (CAM_REQ_CMP_ERR);
}
sasetupdev(softc, softc->devs.er_dev);
cam_periph_lock(periph);
softc->density_type_bits[0] = 0;
softc->density_type_bits[1] = SRDS_MEDIA;
softc->density_type_bits[2] = SRDS_MEDIUM_TYPE;
softc->density_type_bits[3] = SRDS_MEDIUM_TYPE | SRDS_MEDIA;
/*
* Bump the peripheral refcount for the sysctl thread, in case we
* get invalidated before the thread has a chance to run.
*/
cam_periph_acquire(periph);
taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task);
/*
* Add an async callback so that we get
* notified if this device goes away.
*/
xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
xpt_announce_periph(periph, NULL);
xpt_announce_quirks(periph, softc->quirks, SA_QUIRK_BIT_STRING);
return (CAM_REQ_CMP);
}
static void
sastart(struct cam_periph *periph, union ccb *start_ccb)
{
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
switch (softc->state) {
case SA_STATE_NORMAL:
{
/* Pull a buffer from the queue and get going on it */
struct bio *bp;
/*
* See if there is a buf with work for us to do..
*/
bp = bioq_first(&softc->bio_queue);
if (bp == NULL) {
xpt_release_ccb(start_ccb);
} else if (((softc->flags & SA_FLAG_ERR_PENDING) != 0)
|| (softc->inject_eom != 0)) {
struct bio *done_bp;
if (softc->inject_eom != 0) {
softc->flags |= SA_FLAG_EOM_PENDING;
softc->inject_eom = 0;
/*
* If we're injecting EOM for writes, we
* need to keep PEWS set for 3 queries
* to cover 2 position requests from the
* kernel via sagetpos(), and then allow
* for one for the user to see the BPEW
* flag (e.g. via mt status). After that,
* it will be cleared.
*/
if (bp->bio_cmd == BIO_WRITE)
softc->set_pews_status = 3;
else
softc->set_pews_status = 1;
}
again:
softc->queue_count--;
bioq_remove(&softc->bio_queue, bp);
bp->bio_resid = bp->bio_bcount;
done_bp = bp;
if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
/*
* We have two different behaviors for
* writes when we hit either Early Warning
* or the PEWZ (Programmable Early Warning
* Zone). The default behavior is that
* for all writes that are currently
* queued after the write where we saw the
* early warning, we will return the write
* with the residual equal to the count.
* i.e. tell the application that 0 bytes
* were written.
*
* The alternate behavior, which is enabled
* when eot_warn is set, is that in
* addition to setting the residual equal
* to the count, we will set the error
* to ENOSPC.
*
* In either case, once queued writes are
* cleared out, we clear the error flag
* (see below) and the application is free to
* attempt to write more.
*/
if (softc->eot_warn != 0) {
bp->bio_flags |= BIO_ERROR;
bp->bio_error = ENOSPC;
} else
bp->bio_error = 0;
} else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
/*
* This can only happen if we're reading
* in fixed length mode. In this case,
* we dump the rest of the list the
* same way.
*/
bp->bio_error = 0;
if (bioq_first(&softc->bio_queue) != NULL) {
biodone(done_bp);
goto again;
}
} else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
bp->bio_error = EIO;
bp->bio_flags |= BIO_ERROR;
}
bp = bioq_first(&softc->bio_queue);
/*
* Only if we have no other buffers queued up
* do we clear the pending error flag.
*/
if (bp == NULL)
softc->flags &= ~SA_FLAG_ERR_PENDING;
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
"%d more buffers queued up\n",
(softc->flags & SA_FLAG_ERR_PENDING),
(bp != NULL)? "not " : " ", softc->queue_count));
xpt_release_ccb(start_ccb);
biodone(done_bp);
} else {
u_int32_t length;
bioq_remove(&softc->bio_queue, bp);
softc->queue_count--;
length = bp->bio_bcount;
if ((softc->flags & SA_FLAG_FIXED) != 0) {
if (softc->blk_shift != 0) {
length = length >> softc->blk_shift;
} else if (softc->media_blksize != 0) {
length = length / softc->media_blksize;
} else {
bp->bio_error = EIO;
xpt_print(periph->path, "zero blocksize"
" for FIXED length writes?\n");
biodone(bp);
break;
}
#if 0
CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
("issuing a %d fixed record %s\n",
length, (bp->bio_cmd == BIO_READ)? "read" :
"write"));
#endif
} else {
#if 0
CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
("issuing a %d variable byte %s\n",
length, (bp->bio_cmd == BIO_READ)? "read" :
"write"));
#endif
}
devstat_start_transaction_bio(softc->device_stats, bp);
/*
* Some people have theorized that we should
* suppress illegal length indication if we are
* running in variable block mode so that we don't
* have to request sense every time our requested
* block size is larger than the written block.
* The residual information from the ccb allows
* us to identify this situation anyway. The only
* problem with this is that we will not get
* information about blocks that are larger than
* our read buffer unless we set the block size
* in the mode page to something other than 0.
*
* I believe that this is a non-issue. If user apps
* don't adjust their read size to match our record
* size, that's just life. Anyway, the typical usage
* would be to issue, e.g., 64KB reads and occasionally
* have to do deal with 512 byte or 1KB intermediate
* records.
*
* That said, though, we now support setting the
* SILI bit on reads, and we set the blocksize to 4
* bytes when we do that. This gives us
* compatibility with software that wants this,
* although the only real difference between that
* and not setting the SILI bit on reads is that we
* won't get a check condition on reads where our
* request size is larger than the block on tape.
* That probably only makes a real difference in
* non-packetized SCSI, where you have to go back
* to the drive to request sense and thus incur
* more latency.
*/
softc->dsreg = (bp->bio_cmd == BIO_READ)?
MTIO_DSREG_RD : MTIO_DSREG_WR;
scsi_sa_read_write(&start_ccb->csio, 0, sadone,
MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ ?
SCSI_RW_READ : SCSI_RW_WRITE) |
((bp->bio_flags & BIO_UNMAPPED) != 0 ?
SCSI_RW_BIO : 0), softc->sili,
(softc->flags & SA_FLAG_FIXED) != 0, length,
(bp->bio_flags & BIO_UNMAPPED) != 0 ? (void *)bp :
bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
IO_TIMEOUT);
start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
start_ccb->ccb_h.ccb_bp = bp;
bp = bioq_first(&softc->bio_queue);
xpt_action(start_ccb);
}
if (bp != NULL) {
/* Have more work to do, so ensure we stay scheduled */
xpt_schedule(periph, CAM_PRIORITY_NORMAL);
}
break;
}
case SA_STATE_ABNORMAL:
default:
panic("state 0x%x in sastart", softc->state);
break;
}
}
static void
sadone(struct cam_periph *periph, union ccb *done_ccb)
{
struct sa_softc *softc;
struct ccb_scsiio *csio;
struct bio *bp;
int error;
softc = (struct sa_softc *)periph->softc;
csio = &done_ccb->csio;
softc->dsreg = MTIO_DSREG_REST;
bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
error = 0;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
/*
* A retry was scheduled, so just return.
*/
return;
}
}
if (error == EIO) {
/*
* Catastrophic error. Mark the tape as frozen
* (we no longer know tape position).
*
* Return all queued I/O with EIO, and unfreeze
* our queue so that future transactions that
* attempt to fix this problem can get to the
* device.
*
*/
softc->flags |= SA_FLAG_TAPE_FROZEN;
bioq_flush(&softc->bio_queue, NULL, EIO);
}
if (error != 0) {
bp->bio_resid = bp->bio_bcount;
bp->bio_error = error;
bp->bio_flags |= BIO_ERROR;
/*
* In the error case, position is updated in saerror.
*/
} else {
bp->bio_resid = csio->resid;
bp->bio_error = 0;
if (csio->resid != 0) {
bp->bio_flags |= BIO_ERROR;
}
if (bp->bio_cmd == BIO_WRITE) {
softc->flags |= SA_FLAG_TAPE_WRITTEN;
softc->filemarks = 0;
}
if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
(softc->blkno != (daddr_t) -1)) {
if ((softc->flags & SA_FLAG_FIXED) != 0) {
u_int32_t l;
if (softc->blk_shift != 0) {
l = bp->bio_bcount >>
softc->blk_shift;
} else {
l = bp->bio_bcount /
softc->media_blksize;
}
softc->blkno += (daddr_t) l;
} else {
softc->blkno++;
}
}
}
/*
* If we had an error (immediate or pending),
* release the device queue now.
*/
if (error || (softc->flags & SA_FLAG_ERR_PENDING))
cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
if (error || bp->bio_resid) {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("error %d resid %ld count %ld\n", error,
bp->bio_resid, bp->bio_bcount));
}
biofinish(bp, softc->device_stats, 0);
xpt_release_ccb(done_ccb);
}
/*
* Mount the tape (make sure it's ready for I/O).
*/
static int
samount(struct cam_periph *periph, int oflags, struct cdev *dev)
{
struct sa_softc *softc;
union ccb *ccb;
int error;
/*
* oflags can be checked for 'kind' of open (read-only check) - later
* dev can be checked for a control-mode or compression open - later
*/
UNUSED_PARAMETER(oflags);
UNUSED_PARAMETER(dev);
softc = (struct sa_softc *)periph->softc;
/*
* This should determine if something has happened since the last
* open/mount that would invalidate the mount. We do *not* want
* to retry this command- we just want the status. But we only
* do this if we're mounted already- if we're not mounted,
* we don't care about the unit read state and can instead use
* this opportunity to attempt to reserve the tape unit.
*/
if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
ccb = cam_periph_getccb(periph, 1);
scsi_test_unit_ready(&ccb->csio, 0, NULL,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
if (error == ENXIO) {
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
scsi_test_unit_ready(&ccb->csio, 0, NULL,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
} else if (error) {
/*
* We don't need to freeze the tape because we
* will now attempt to rewind/load it.
*/
softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
xpt_print(periph->path,
"error %d on TUR in samount\n", error);
}
}
} else {
error = sareservereleaseunit(periph, TRUE);
if (error) {
return (error);
}
ccb = cam_periph_getccb(periph, 1);
scsi_test_unit_ready(&ccb->csio, 0, NULL,
MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
}
if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
struct scsi_read_block_limits_data *rblim = NULL;
int comp_enabled, comp_supported;
u_int8_t write_protect, guessing = 0;
/*
* Clear out old state.
*/
softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
SA_FLAG_ERR_PENDING|SA_FLAG_COMPRESSION);
softc->filemarks = 0;
/*
* *Very* first off, make sure we're loaded to BOT.
*/
scsi_load_unload(&ccb->csio, 2, NULL, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
/*
* In case this doesn't work, do a REWIND instead
*/
if (error) {
scsi_rewind(&ccb->csio, 2, NULL, MSG_SIMPLE_Q_TAG,
FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
}
if (error) {
xpt_release_ccb(ccb);
goto exit;
}
/*
* Do a dummy test read to force access to the
* media so that the drive will really know what's
* there. We actually don't really care what the
* blocksize on tape is and don't expect to really
* read a full record.
*/
rblim = (struct scsi_read_block_limits_data *)
malloc(8192, M_SCSISA, M_NOWAIT);
if (rblim == NULL) {
xpt_print(periph->path, "no memory for test read\n");
xpt_release_ccb(ccb);
error = ENOMEM;
goto exit;
}
if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
scsi_sa_read_write(&ccb->csio, 0, NULL,
MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
(void *) rblim, 8192, SSD_FULL_SIZE,
IO_TIMEOUT);
(void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
scsi_rewind(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG,
FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
SF_NO_PRINT | SF_RETRY_UA,
softc->device_stats);
if (error) {
xpt_print(periph->path,
"unable to rewind after test read\n");
xpt_release_ccb(ccb);
goto exit;
}
}
/*
* Next off, determine block limits.
*/
scsi_read_block_limits(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG,
rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
xpt_release_ccb(ccb);
if (error != 0) {
/*
* If it's less than SCSI-2, READ BLOCK LIMITS is not
* a MANDATORY command. Anyway- it doesn't matter-
* we can proceed anyway.
*/
softc->blk_gran = 0;
softc->max_blk = ~0;
softc->min_blk = 0;
} else {
if (softc->scsi_rev >= SCSI_REV_SPC) {
softc->blk_gran = RBL_GRAN(rblim);
} else {
softc->blk_gran = 0;
}
/*
* We take max_blk == min_blk to mean a default to
* fixed mode- but note that whatever we get out of
* sagetparams below will actually determine whether
* we are actually *in* fixed mode.
*/
softc->max_blk = scsi_3btoul(rblim->maximum);
softc->min_blk = scsi_2btoul(rblim->minimum);
}
/*
* Next, perform a mode sense to determine
* current density, blocksize, compression etc.
*/
error = sagetparams(periph, SA_PARAM_ALL,
&softc->media_blksize,
&softc->media_density,
&softc->media_numblks,
&softc->buffer_mode, &write_protect,
&softc->speed, &comp_supported,
&comp_enabled, &softc->comp_algorithm,
NULL, NULL, 0, 0);
if (error != 0) {
/*
* We could work a little harder here. We could
* adjust our attempts to get information. It
* might be an ancient tape drive. If someone
* nudges us, we'll do that.
*/
goto exit;
}
/*
* If no quirk has determined that this is a device that is
* preferred to be in fixed or variable mode, now is the time
* to find out.
*/
if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
guessing = 1;
/*
* This could be expensive to find out. Luckily we
* only need to do this once. If we start out in
* 'default' mode, try and set ourselves to one
* of the densities that would determine a wad
* of other stuff. Go from highest to lowest.
*/
if (softc->media_density == SCSI_DEFAULT_DENSITY) {
int i;
static u_int8_t ctry[] = {
SCSI_DENSITY_HALFINCH_PE,
SCSI_DENSITY_HALFINCH_6250C,
SCSI_DENSITY_HALFINCH_6250,
SCSI_DENSITY_HALFINCH_1600,
SCSI_DENSITY_HALFINCH_800,
SCSI_DENSITY_QIC_4GB,
SCSI_DENSITY_QIC_2GB,
SCSI_DENSITY_QIC_525_320,
SCSI_DENSITY_QIC_150,
SCSI_DENSITY_QIC_120,
SCSI_DENSITY_QIC_24,
SCSI_DENSITY_QIC_11_9TRK,
SCSI_DENSITY_QIC_11_4TRK,
SCSI_DENSITY_QIC_1320,
SCSI_DENSITY_QIC_3080,
0
};
for (i = 0; ctry[i]; i++) {
error = sasetparams(periph,
SA_PARAM_DENSITY, 0, ctry[i],
0, SF_NO_PRINT);
if (error == 0) {
softc->media_density = ctry[i];
break;
}
}
}
switch (softc->media_density) {
case SCSI_DENSITY_QIC_11_4TRK:
case SCSI_DENSITY_QIC_11_9TRK:
case SCSI_DENSITY_QIC_24:
case SCSI_DENSITY_QIC_120:
case SCSI_DENSITY_QIC_150:
case SCSI_DENSITY_QIC_525_320:
case SCSI_DENSITY_QIC_1320:
case SCSI_DENSITY_QIC_3080:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
softc->last_media_blksize = 512;
break;
case SCSI_DENSITY_QIC_4GB:
case SCSI_DENSITY_QIC_2GB:
softc->quirks &= ~SA_QUIRK_2FM;
softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
softc->last_media_blksize = 1024;
break;
default:
softc->last_media_blksize =
softc->media_blksize;
softc->quirks |= SA_QUIRK_VARIABLE;
break;
}
}
/*
* If no quirk has determined that this is a device that needs
* to have 2 Filemarks at EOD, now is the time to find out.
*/
if ((softc->quirks & SA_QUIRK_2FM) == 0) {
switch (softc->media_density) {
case SCSI_DENSITY_HALFINCH_800:
case SCSI_DENSITY_HALFINCH_1600:
case SCSI_DENSITY_HALFINCH_6250:
case SCSI_DENSITY_HALFINCH_6250C:
case SCSI_DENSITY_HALFINCH_PE:
softc->quirks &= ~SA_QUIRK_1FM;
softc->quirks |= SA_QUIRK_2FM;
break;
default:
break;
}
}
/*
* Now validate that some info we got makes sense.
*/
if ((softc->max_blk < softc->media_blksize) ||
(softc->min_blk > softc->media_blksize &&
softc->media_blksize)) {
xpt_print(periph->path,
"BLOCK LIMITS (%d..%d) could not match current "
"block settings (%d)- adjusting\n", softc->min_blk,
softc->max_blk, softc->media_blksize);
softc->max_blk = softc->min_blk =
softc->media_blksize;
}
/*
* Now put ourselves into the right frame of mind based
* upon quirks...
*/
tryagain:
/*
* If we want to be in FIXED mode and our current blocksize
* is not equal to our last blocksize (if nonzero), try and
* set ourselves to this last blocksize (as the 'preferred'
* block size). The initial quirkmatch at registry sets the
* initial 'last' blocksize. If, for whatever reason, this
* 'last' blocksize is zero, set the blocksize to 512,
* or min_blk if that's larger.
*/
if ((softc->quirks & SA_QUIRK_FIXED) &&
(softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
(softc->media_blksize != softc->last_media_blksize)) {
softc->media_blksize = softc->last_media_blksize;
if (softc->media_blksize == 0) {
softc->media_blksize = 512;
if (softc->media_blksize < softc->min_blk) {
softc->media_blksize = softc->min_blk;
}
}
error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
softc->media_blksize, 0, 0, SF_NO_PRINT);
if (error) {
xpt_print(periph->path,
"unable to set fixed blocksize to %d\n",
softc->media_blksize);
goto exit;
}
}
if ((softc->quirks & SA_QUIRK_VARIABLE) &&
(softc->media_blksize != 0)) {
softc->last_media_blksize = softc->media_blksize;
softc->media_blksize = 0;
error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
0, 0, 0, SF_NO_PRINT);
if (error) {
/*
* If this fails and we were guessing, just
* assume that we got it wrong and go try
* fixed block mode. Don't even check against
* density code at this point.
*/
if (guessing) {
softc->quirks &= ~SA_QUIRK_VARIABLE;
softc->quirks |= SA_QUIRK_FIXED;
if (softc->last_media_blksize == 0)
softc->last_media_blksize = 512;
goto tryagain;
}
xpt_print(periph->path,
"unable to set variable blocksize\n");
goto exit;
}
}
/*
* Now that we have the current block size,
* set up some parameters for sastart's usage.
*/
if (softc->media_blksize) {
softc->flags |= SA_FLAG_FIXED;
if (powerof2(softc->media_blksize)) {
softc->blk_shift =
ffs(softc->media_blksize) - 1;
softc->blk_mask = softc->media_blksize - 1;
} else {
softc->blk_mask = ~0;
softc->blk_shift = 0;
}
} else {
/*
* The SCSI-3 spec allows 0 to mean "unspecified".
* The SCSI-1 spec allows 0 to mean 'infinite'.
*
* Either works here.
*/
if (softc->max_blk == 0) {
softc->max_blk = ~0;
}
softc->blk_shift = 0;
if (softc->blk_gran != 0) {
softc->blk_mask = softc->blk_gran - 1;
} else {
softc->blk_mask = 0;
}
}
if (write_protect)
softc->flags |= SA_FLAG_TAPE_WP;
if (comp_supported) {
if (softc->saved_comp_algorithm == 0)
softc->saved_comp_algorithm =
softc->comp_algorithm;
softc->flags |= SA_FLAG_COMP_SUPP;
if (comp_enabled)
softc->flags |= SA_FLAG_COMP_ENABLED;
} else
softc->flags |= SA_FLAG_COMP_UNSUPP;
if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
(softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
0, 0, SF_NO_PRINT);
if (error == 0) {
softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
} else {
xpt_print(periph->path,
"unable to set buffered mode\n");
}
error = 0; /* not an error */
}
if (error == 0) {
softc->flags |= SA_FLAG_TAPE_MOUNTED;
}
exit:
if (rblim != NULL)
free(rblim, M_SCSISA);
if (error != 0) {
softc->dsreg = MTIO_DSREG_NIL;
} else {
softc->fileno = softc->blkno = 0;
softc->rep_fileno = softc->rep_blkno = -1;
softc->partition = 0;
softc->dsreg = MTIO_DSREG_REST;
}
#ifdef SA_1FM_AT_EOD
if ((softc->quirks & SA_QUIRK_2FM) == 0)
softc->quirks |= SA_QUIRK_1FM;
#else
if ((softc->quirks & SA_QUIRK_1FM) == 0)
softc->quirks |= SA_QUIRK_2FM;
#endif
} else
xpt_release_ccb(ccb);
/*
* If we return an error, we're not mounted any more,
* so release any device reservation.
*/
if (error != 0) {
(void) sareservereleaseunit(periph, FALSE);
} else {
/*
* Clear I/O residual.
*/
softc->last_io_resid = 0;
softc->last_ctl_resid = 0;
}
return (error);
}
/*
* How many filemarks do we need to write if we were to terminate the
* tape session right now? Note that this can be a negative number
*/
static int
samarkswanted(struct cam_periph *periph)
{
int markswanted;
struct sa_softc *softc;
softc = (struct sa_softc *)periph->softc;
markswanted = 0;
if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
markswanted++;
if (softc->quirks & SA_QUIRK_2FM)
markswanted++;
}
markswanted -= softc->filemarks;
return (markswanted);
}
static int
sacheckeod(struct cam_periph *periph)
{
int error;
int markswanted;
markswanted = samarkswanted(periph);
if (markswanted > 0) {
error = sawritefilemarks(periph, markswanted, FALSE, FALSE);
} else {
error = 0;
}
return (error);
}
static int
saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
{
static const char *toobig =
"%d-byte tape record bigger than supplied buffer\n";
struct cam_periph *periph;
struct sa_softc *softc;
struct ccb_scsiio *csio;
struct scsi_sense_data *sense;
uint64_t resid = 0;
int64_t info = 0;
cam_status status;
int error_code, sense_key, asc, ascq, error, aqvalid, stream_valid;
int sense_len;
uint8_t stream_bits;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct sa_softc *)periph->softc;
csio = &ccb->csio;
sense = &csio->sense_data;
sense_len = csio->sense_len - csio->sense_resid;
scsi_extract_sense_len(sense, sense_len, &error_code, &sense_key,
&asc, &ascq, /*show_errors*/ 1);
if (asc != -1 && ascq != -1)
aqvalid = 1;
else
aqvalid = 0;
if (scsi_get_stream_info(sense, sense_len, NULL, &stream_bits) == 0)
stream_valid = 1;
else
stream_valid = 0;
error = 0;
status = csio->ccb_h.status & CAM_STATUS_MASK;
/*
* Calculate/latch up, any residuals... We do this in a funny 2-step
* so we can print stuff here if we have CAM_DEBUG enabled for this
* unit.
*/
if (status == CAM_SCSI_STATUS_ERROR) {
if (scsi_get_sense_info(sense, sense_len, SSD_DESC_INFO, &resid,
&info) == 0) {
if ((softc->flags & SA_FLAG_FIXED) != 0)
resid *= softc->media_blksize;
} else {
resid = csio->dxfer_len;
info = resid;
if ((softc->flags & SA_FLAG_FIXED) != 0) {
if (softc->media_blksize)
info /= softc->media_blksize;
}
}
if (csio->cdb_io.cdb_bytes[0] == SA_READ ||
csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
sizeof (struct scsi_sense_data));
bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
(int) csio->cdb_len);
softc->last_io_resid = resid;
softc->last_resid_was_io = 1;
} else {
bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
sizeof (struct scsi_sense_data));
bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
(int) csio->cdb_len);
softc->last_ctl_resid = resid;
softc->last_resid_was_io = 0;
}
CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
"ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %jd "
"dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
sense_key, asc, ascq, status,
(stream_valid) ? stream_bits : 0, (intmax_t)resid,
csio->dxfer_len));
} else {
CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
("Cam Status 0x%x\n", status));
}
switch (status) {
case CAM_REQ_CMP:
return (0);
case CAM_SCSI_STATUS_ERROR:
/*
* If a read/write command, we handle it here.
*/
if (csio->cdb_io.cdb_bytes[0] == SA_READ ||
csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
break;
}
/*
* If this was just EOM/EOP, Filemark, Setmark, ILI or
* PEW detected on a non read/write command, we assume
* it's not an error and propagate the residual and return.
*/
if ((aqvalid && asc == 0 && ((ascq > 0 && ascq <= 5)
|| (ascq == 0x07)))
|| (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
csio->resid = resid;
QFRLS(ccb);
return (0);
}
/*
* Otherwise, we let the common code handle this.
*/
return (cam_periph_error(ccb, cflgs, sflgs));
/*
* XXX: To Be Fixed
* We cannot depend upon CAM honoring retry counts for these.
*/
case CAM_SCSI_BUS_RESET:
case CAM_BDR_SENT:
if (ccb->ccb_h.retry_count <= 0) {
return (EIO);
}
/* FALLTHROUGH */
default:
return (cam_periph_error(ccb, cflgs, sflgs));
}
/*
* Handle filemark, end of tape, mismatched record sizes....
* From this point out, we're only handling read/write cases.
* Handle writes && reads differently.
*/
if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
csio->resid = resid;
error = ENOSPC;
} else if ((stream_valid != 0) && (stream_bits & SSD_EOM)) {
softc->flags |= SA_FLAG_EOM_PENDING;
/*
* Grotesque as it seems, the few times
* I've actually seen a non-zero resid,
* the tape drive actually lied and had
* written all the data!.
*/
csio->resid = 0;
}
} else {
csio->resid = resid;
if (sense_key == SSD_KEY_BLANK_CHECK) {
if (softc->quirks & SA_QUIRK_1FM) {
error = 0;
softc->flags |= SA_FLAG_EOM_PENDING;
} else {
error = EIO;
}
} else if ((stream_valid != 0) && (stream_bits & SSD_FILEMARK)){
if (softc->flags & SA_FLAG_FIXED) {
error = -1;
softc->flags |= SA_FLAG_EOF_PENDING;
}
/*
* Unconditionally, if we detected a filemark on a read,
* mark that we've run moved a file ahead.
*/
if (softc->fileno != (daddr_t) -1) {
softc->fileno++;
softc->blkno = 0;
csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
}
}
}
/*
* Incorrect Length usually applies to read, but can apply to writes.
*/
if (error == 0 && (stream_valid != 0) && (stream_bits & SSD_ILI)) {
if (info < 0) {
xpt_print(csio->ccb_h.path, toobig,
csio->dxfer_len - info);
csio->resid = csio->dxfer_len;
error = EIO;
} else {
csio->resid = resid;
if (softc->flags & SA_FLAG_FIXED) {
softc->flags |= SA_FLAG_EIO_PENDING;
}
/*
* Bump the block number if we hadn't seen a filemark.
* Do this independent of errors (we've moved anyway).
*/
if ((stream_valid == 0) ||
(stream_bits & SSD_FILEMARK) == 0) {
if (softc->blkno != (daddr_t) -1) {
softc->blkno++;
csio->ccb_h.ccb_pflags |=
SA_POSITION_UPDATED;
}
}
}
}
if (error <= 0) {
/*
* Unfreeze the queue if frozen as we're not returning anything
* to our waiters that would indicate an I/O error has occurred
* (yet).
*/
QFRLS(ccb);
error = 0;
}
return (error);
}
static int
sagetparams(struct cam_periph *periph, sa_params params_to_get,
u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
sa_comp_t *tcs, struct scsi_control_data_prot_subpage *prot_page,
int dp_size, int prot_changeable)
{
union ccb *ccb;
void *mode_buffer;
struct scsi_mode_header_6 *mode_hdr;
struct scsi_mode_blk_desc *mode_blk;
int mode_buffer_len;
struct sa_softc *softc;
u_int8_t cpage;
int error;
cam_status status;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
if (softc->quirks & SA_QUIRK_NO_CPAGE)
cpage = SA_DEVICE_CONFIGURATION_PAGE;
else
cpage = SA_DATA_COMPRESSION_PAGE;
retry:
mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
if (params_to_get & SA_PARAM_COMPRESSION) {
if (softc->quirks & SA_QUIRK_NOCOMP) {
*comp_supported = FALSE;
params_to_get &= ~SA_PARAM_COMPRESSION;
} else
mode_buffer_len += sizeof (sa_comp_t);
}
/* XXX Fix M_NOWAIT */
mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
if (mode_buffer == NULL) {
xpt_release_ccb(ccb);
return (ENOMEM);
}
mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
/* it is safe to retry this */
scsi_mode_sense(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG, FALSE,
SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
status = ccb->ccb_h.status & CAM_STATUS_MASK;
if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
/*
* Hmm. Let's see if we can try another page...
* If we've already done that, give up on compression
* for this device and remember this for the future
* and attempt the request without asking for compression
* info.
*/
if (cpage == SA_DATA_COMPRESSION_PAGE) {
cpage = SA_DEVICE_CONFIGURATION_PAGE;
goto retry;
}
softc->quirks |= SA_QUIRK_NOCOMP;
free(mode_buffer, M_SCSISA);
goto retry;
} else if (status == CAM_SCSI_STATUS_ERROR) {
/* Tell the user about the fatal error. */
scsi_sense_print(&ccb->csio);
goto sagetparamsexit;
}
/*
* If the user only wants the compression information, and
* the device doesn't send back the block descriptor, it's
* no big deal. If the user wants more than just
* compression, though, and the device doesn't pass back the
* block descriptor, we need to send another mode sense to
* get the block descriptor.
*/
if ((mode_hdr->blk_desc_len == 0) &&
(params_to_get & SA_PARAM_COMPRESSION) &&
(params_to_get & ~(SA_PARAM_COMPRESSION))) {
/*
* Decrease the mode buffer length by the size of
* the compression page, to make sure the data
* there doesn't get overwritten.
*/
mode_buffer_len -= sizeof (sa_comp_t);
/*
* Now move the compression page that we presumably
* got back down the memory chunk a little bit so
* it doesn't get spammed.
*/
bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
/*
* Now, we issue another mode sense and just ask
* for the block descriptor, etc.
*/
scsi_mode_sense(&ccb->csio, 2, NULL, MSG_SIMPLE_Q_TAG, FALSE,
SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
if (error != 0)
goto sagetparamsexit;
}
if (params_to_get & SA_PARAM_BLOCKSIZE)
*blocksize = scsi_3btoul(mode_blk->blklen);
if (params_to_get & SA_PARAM_NUMBLOCKS)
*numblocks = scsi_3btoul(mode_blk->nblocks);
if (params_to_get & SA_PARAM_BUFF_MODE)
*buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
if (params_to_get & SA_PARAM_DENSITY)
*density = mode_blk->density;
if (params_to_get & SA_PARAM_WP)
*write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
if (params_to_get & SA_PARAM_SPEED)
*speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
if (params_to_get & SA_PARAM_COMPRESSION) {
sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
if (cpage == SA_DATA_COMPRESSION_PAGE) {
struct scsi_data_compression_page *cp = &ntcs->dcomp;
*comp_supported =
(cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
*comp_enabled =
(cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
*comp_algorithm = scsi_4btoul(cp->comp_algorithm);
} else {
struct scsi_dev_conf_page *cp = &ntcs->dconf;
/*
* We don't really know whether this device supports
* Data Compression if the algorithm field is
* zero. Just say we do.
*/
*comp_supported = TRUE;
*comp_enabled =
(cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
*comp_algorithm = cp->sel_comp_alg;
}
if (tcs != NULL)
bcopy(ntcs, tcs, sizeof (sa_comp_t));
}
if ((params_to_get & SA_PARAM_DENSITY_EXT)
&& (softc->scsi_rev >= SCSI_REV_SPC)) {
int i;
for (i = 0; i < SA_DENSITY_TYPES; i++) {
scsi_report_density_support(&ccb->csio,
/*retries*/ 1,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*media*/ softc->density_type_bits[i] & SRDS_MEDIA,
/*medium_type*/ softc->density_type_bits[i] &
SRDS_MEDIUM_TYPE,
/*data_ptr*/ softc->density_info[i],
/*length*/ sizeof(softc->density_info[i]),
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ REP_DENSITY_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
status = ccb->ccb_h.status & CAM_STATUS_MASK;
/*
* Some tape drives won't support this command at
* all, but hopefully we'll minimize that with the
* check for SPC or greater support above. If they
* don't support the default report (neither the
* MEDIA or MEDIUM_TYPE bits set), then there is
* really no point in continuing on to look for
* other reports.
*/
if ((error != 0)
|| (status != CAM_REQ_CMP)) {
error = 0;
softc->density_info_valid[i] = 0;
if (softc->density_type_bits[i] == 0)
break;
else
continue;
}
softc->density_info_valid[i] = ccb->csio.dxfer_len -
ccb->csio.resid;
}
}
/*
* Get logical block protection parameters if the drive supports it.
*/
if ((params_to_get & SA_PARAM_LBP)
&& (softc->flags & SA_FLAG_PROTECT_SUPP)) {
struct scsi_mode_header_10 *mode10_hdr;
struct scsi_control_data_prot_subpage *dp_page;
struct scsi_mode_sense_10 *cdb;
struct sa_prot_state *prot;
int dp_len, returned_len;
if (dp_size == 0)
dp_size = sizeof(*dp_page);
dp_len = sizeof(*mode10_hdr) + dp_size;
mode10_hdr = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
if (mode10_hdr == NULL) {
error = ENOMEM;
goto sagetparamsexit;
}
scsi_mode_sense_len(&ccb->csio,
/*retries*/ 5,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*dbd*/ TRUE,
/*page_code*/ (prot_changeable == 0) ?
SMS_PAGE_CTRL_CURRENT :
SMS_PAGE_CTRL_CHANGEABLE,
/*page*/ SMS_CONTROL_MODE_PAGE,
/*param_buf*/ (uint8_t *)mode10_hdr,
/*param_len*/ dp_len,
/*minimum_cmd_size*/ 10,
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ SCSIOP_TIMEOUT);
/*
* XXX KDM we need to be able to set the subpage in the
* fill function.
*/
cdb = (struct scsi_mode_sense_10 *)ccb->csio.cdb_io.cdb_bytes;
cdb->subpage = SA_CTRL_DP_SUBPAGE_CODE;
error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
softc->device_stats);
if (error != 0) {
free(mode10_hdr, M_SCSISA);
goto sagetparamsexit;
}
status = ccb->ccb_h.status & CAM_STATUS_MASK;
if (status != CAM_REQ_CMP) {
error = EINVAL;
free(mode10_hdr, M_SCSISA);
goto sagetparamsexit;
}
/*
* The returned data length at least has to be long enough
* for us to look at length in the mode page header.
*/
returned_len = ccb->csio.dxfer_len - ccb->csio.resid;
if (returned_len < sizeof(mode10_hdr->data_length)) {
error = EINVAL;
free(mode10_hdr, M_SCSISA);
goto sagetparamsexit;
}
returned_len = min(returned_len,
sizeof(mode10_hdr->data_length) +
scsi_2btoul(mode10_hdr->data_length));
dp_page = (struct scsi_control_data_prot_subpage *)
&mode10_hdr[1];
/*
* We also have to have enough data to include the prot_bits
* in the subpage.
*/
if (returned_len < (sizeof(*mode10_hdr) +
__offsetof(struct scsi_control_data_prot_subpage, prot_bits)
+ sizeof(dp_page->prot_bits))) {
error = EINVAL;
free(mode10_hdr, M_SCSISA);
goto sagetparamsexit;
}
prot = &softc->prot_info.cur_prot_state;
prot->prot_method = dp_page->prot_method;
prot->pi_length = dp_page->pi_length &
SA_CTRL_DP_PI_LENGTH_MASK;
prot->lbp_w = (dp_page->prot_bits & SA_CTRL_DP_LBP_W) ? 1 :0;
prot->lbp_r = (dp_page->prot_bits & SA_CTRL_DP_LBP_R) ? 1 :0;
prot->rbdp = (dp_page->prot_bits & SA_CTRL_DP_RBDP) ? 1 :0;
prot->initialized = 1;
if (prot_page != NULL)
bcopy(dp_page, prot_page, min(sizeof(*prot_page),
sizeof(*dp_page)));
free(mode10_hdr, M_SCSISA);
}
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
int idx;
char *xyz = mode_buffer;
xpt_print_path(periph->path);
printf("Mode Sense Data=");
for (idx = 0; idx < mode_buffer_len; idx++)
printf(" 0x%02x", xyz[idx] & 0xff);
printf("\n");
}
sagetparamsexit:
xpt_release_ccb(ccb);
free(mode_buffer, M_SCSISA);
return (error);
}
/*
* Set protection information to the pending protection information stored
* in the softc.
*/
static int
sasetprot(struct cam_periph *periph, struct sa_prot_state *new_prot)
{
struct sa_softc *softc;
struct scsi_control_data_prot_subpage *dp_page, *dp_changeable;
struct scsi_mode_header_10 *mode10_hdr, *mode10_changeable;
union ccb *ccb;
uint8_t current_speed;
size_t dp_size, dp_page_length;
int dp_len, buff_mode;
int error;
softc = (struct sa_softc *)periph->softc;
mode10_hdr = NULL;
mode10_changeable = NULL;
ccb = NULL;
/*
* Start off with the size set to the actual length of the page
* that we have defined.
*/
dp_size = sizeof(*dp_changeable);
dp_page_length = dp_size -
__offsetof(struct scsi_control_data_prot_subpage, prot_method);
retry_length:
dp_len = sizeof(*mode10_changeable) + dp_size;
mode10_changeable = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
if (mode10_changeable == NULL) {
error = ENOMEM;
goto bailout;
}
dp_changeable =
(struct scsi_control_data_prot_subpage *)&mode10_changeable[1];
/*
* First get the data protection page changeable parameters mask.
* We need to know which parameters the drive supports changing.
* We also need to know what the drive claims that its page length
* is. The reason is that IBM drives in particular are very picky
* about the page length. They want it (the length set in the
* page structure itself) to be 28 bytes, and they want the
* parameter list length specified in the mode select header to be
* 40 bytes. So, to work with IBM drives as well as any other tape
* drive, find out what the drive claims the page length is, and
* make sure that we match that.
*/
error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
NULL, NULL, dp_changeable, dp_size, /*prot_changeable*/ 1);
if (error != 0)
goto bailout;
if (scsi_2btoul(dp_changeable->length) > dp_page_length) {
dp_page_length = scsi_2btoul(dp_changeable->length);
dp_size = dp_page_length +
__offsetof(struct scsi_control_data_prot_subpage,
prot_method);
free(mode10_changeable, M_SCSISA);
mode10_changeable = NULL;
goto retry_length;
}
mode10_hdr = malloc(dp_len, M_SCSISA, M_NOWAIT | M_ZERO);
if (mode10_hdr == NULL) {
error = ENOMEM;
goto bailout;
}
dp_page = (struct scsi_control_data_prot_subpage *)&mode10_hdr[1];
/*
* Now grab the actual current settings in the page.
*/
error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
NULL, NULL, dp_page, dp_size, /*prot_changeable*/ 0);
if (error != 0)
goto bailout;
/* These two fields need to be 0 for MODE SELECT */
scsi_ulto2b(0, mode10_hdr->data_length);
mode10_hdr->medium_type = 0;
/* We are not including a block descriptor */
scsi_ulto2b(0, mode10_hdr->blk_desc_len);
mode10_hdr->dev_spec = current_speed;
/* if set, set single-initiator buffering mode */
if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
mode10_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
}
/*
* For each field, make sure that the drive allows changing it
* before bringing in the user's setting.
*/
if (dp_changeable->prot_method != 0)
dp_page->prot_method = new_prot->prot_method;
if (dp_changeable->pi_length & SA_CTRL_DP_PI_LENGTH_MASK) {
dp_page->pi_length &= ~SA_CTRL_DP_PI_LENGTH_MASK;
dp_page->pi_length |= (new_prot->pi_length &
SA_CTRL_DP_PI_LENGTH_MASK);
}
if (dp_changeable->prot_bits & SA_CTRL_DP_LBP_W) {
if (new_prot->lbp_w)
dp_page->prot_bits |= SA_CTRL_DP_LBP_W;
else
dp_page->prot_bits &= ~SA_CTRL_DP_LBP_W;
}
if (dp_changeable->prot_bits & SA_CTRL_DP_LBP_R) {
if (new_prot->lbp_r)
dp_page->prot_bits |= SA_CTRL_DP_LBP_R;
else
dp_page->prot_bits &= ~SA_CTRL_DP_LBP_R;
}
if (dp_changeable->prot_bits & SA_CTRL_DP_RBDP) {
if (new_prot->rbdp)
dp_page->prot_bits |= SA_CTRL_DP_RBDP;
else
dp_page->prot_bits &= ~SA_CTRL_DP_RBDP;
}
ccb = cam_periph_getccb(periph, 1);
scsi_mode_select_len(&ccb->csio,
/*retries*/ 5,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*scsi_page_fmt*/ TRUE,
/*save_pages*/ FALSE,
/*param_buf*/ (uint8_t *)mode10_hdr,
/*param_len*/ dp_len,
/*minimum_cmd_size*/ 10,
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
if (error != 0)
goto bailout;
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
error = EINVAL;
goto bailout;
}
/*
* The operation was successful. We could just copy the settings
* the user requested, but just in case the drive ignored some of
* our settings, let's ask for status again.
*/
error = sagetparams(periph, SA_PARAM_SPEED | SA_PARAM_LBP,
NULL, NULL, NULL, &buff_mode, NULL, &current_speed, NULL, NULL,
NULL, NULL, dp_page, dp_size, 0);
bailout:
if (ccb != NULL)
xpt_release_ccb(ccb);
free(mode10_hdr, M_SCSISA);
free(mode10_changeable, M_SCSISA);
return (error);
}
/*
* The purpose of this function is to set one of four different parameters
* for a tape drive:
* - blocksize
* - density
* - compression / compression algorithm
* - buffering mode
*
* The assumption is that this will be called from saioctl(), and therefore
* from a process context. Thus the waiting malloc calls below. If that
* assumption ever changes, the malloc calls should be changed to be
* NOWAIT mallocs.
*
* Any or all of the four parameters may be set when this function is
* called. It should handle setting more than one parameter at once.
*/
static int
sasetparams(struct cam_periph *periph, sa_params params_to_set,
u_int32_t blocksize, u_int8_t density, u_int32_t calg,
u_int32_t sense_flags)
{
struct sa_softc *softc;
u_int32_t current_blocksize;
u_int32_t current_calg;
u_int8_t current_density;
u_int8_t current_speed;
int comp_enabled, comp_supported;
void *mode_buffer;
int mode_buffer_len;
struct scsi_mode_header_6 *mode_hdr;
struct scsi_mode_blk_desc *mode_blk;
sa_comp_t *ccomp, *cpage;
int buff_mode;
union ccb *ccb = NULL;
int error;
softc = (struct sa_softc *)periph->softc;
ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT);
if (ccomp == NULL)
return (ENOMEM);
/*
* Since it doesn't make sense to set the number of blocks, or
* write protection, we won't try to get the current value. We
* always want to get the blocksize, so we can set it back to the
* proper value.
*/
error = sagetparams(periph,
params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
&current_blocksize, &current_density, NULL, &buff_mode, NULL,
&current_speed, &comp_supported, &comp_enabled,
&current_calg, ccomp, NULL, 0, 0);
if (error != 0) {
free(ccomp, M_SCSISA);
return (error);
}
mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
if (params_to_set & SA_PARAM_COMPRESSION)
mode_buffer_len += sizeof (sa_comp_t);
mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
if (mode_buffer == NULL) {
free(ccomp, M_SCSISA);
return (ENOMEM);
}
mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
ccb = cam_periph_getccb(periph, 1);
retry:
if (params_to_set & SA_PARAM_COMPRESSION) {
if (mode_blk) {
cpage = (sa_comp_t *)&mode_blk[1];
} else {
cpage = (sa_comp_t *)&mode_hdr[1];
}
bcopy(ccomp, cpage, sizeof (sa_comp_t));
cpage->hdr.pagecode &= ~0x80;
} else
cpage = NULL;
/*
* If the caller wants us to set the blocksize, use the one they
* pass in. Otherwise, use the blocksize we got back from the
* mode select above.
*/
if (mode_blk) {
if (params_to_set & SA_PARAM_BLOCKSIZE)
scsi_ulto3b(blocksize, mode_blk->blklen);
else
scsi_ulto3b(current_blocksize, mode_blk->blklen);
/*
* Set density if requested, else preserve old density.
* SCSI_SAME_DENSITY only applies to SCSI-2 or better
* devices, else density we've latched up in our softc.
*/
if (params_to_set & SA_PARAM_DENSITY) {
mode_blk->density = density;
} else if (softc->scsi_rev > SCSI_REV_CCS) {
mode_blk->density = SCSI_SAME_DENSITY;
} else {
mode_blk->density = softc->media_density;
}
}
/*
* For mode selects, these two fields must be zero.
*/
mode_hdr->data_length = 0;
mode_hdr->medium_type = 0;
/* set the speed to the current value */
mode_hdr->dev_spec = current_speed;
/* if set, set single-initiator buffering mode */
if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
}
if (mode_blk)
mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
else
mode_hdr->blk_desc_len = 0;
/*
* First, if the user wants us to set the compression algorithm or
* just turn compression on, check to make sure that this drive
* supports compression.
*/
if (params_to_set & SA_PARAM_COMPRESSION) {
/*
* If the compression algorithm is 0, disable compression.
* If the compression algorithm is non-zero, enable
* compression and set the compression type to the
* specified compression algorithm, unless the algorithm is
* MT_COMP_ENABLE. In that case, we look at the
* compression algorithm that is currently set and if it is
* non-zero, we leave it as-is. If it is zero, and we have
* saved a compression algorithm from a time when
* compression was enabled before, set the compression to
* the saved value.
*/
switch (ccomp->hdr.pagecode & ~0x80) {
case SA_DEVICE_CONFIGURATION_PAGE:
{
struct scsi_dev_conf_page *dcp = &cpage->dconf;
if (calg == 0) {
dcp->sel_comp_alg = SA_COMP_NONE;
break;
}
if (calg != MT_COMP_ENABLE) {
dcp->sel_comp_alg = calg;
} else if (dcp->sel_comp_alg == SA_COMP_NONE &&
softc->saved_comp_algorithm != 0) {
dcp->sel_comp_alg = softc->saved_comp_algorithm;
}
break;
}
case SA_DATA_COMPRESSION_PAGE:
if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
struct scsi_data_compression_page *dcp = &cpage->dcomp;
if (calg == 0) {
/*
* Disable compression, but leave the
* decompression and the capability bit
* alone.
*/
dcp->dce_and_dcc = SA_DCP_DCC;
dcp->dde_and_red |= SA_DCP_DDE;
break;
}
/* enable compression && decompression */
dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
dcp->dde_and_red |= SA_DCP_DDE;
/*
* If there, use compression algorithm from caller.
* Otherwise, if there's a saved compression algorithm
* and there is no current algorithm, use the saved
* algorithm. Else parrot back what we got and hope
* for the best.
*/
if (calg != MT_COMP_ENABLE) {
scsi_ulto4b(calg, dcp->comp_algorithm);
scsi_ulto4b(calg, dcp->decomp_algorithm);
} else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
softc->saved_comp_algorithm != 0) {
scsi_ulto4b(softc->saved_comp_algorithm,
dcp->comp_algorithm);
scsi_ulto4b(softc->saved_comp_algorithm,
dcp->decomp_algorithm);
}
break;
}
/*
* Compression does not appear to be supported-
* at least via the DATA COMPRESSION page. It
* would be too much to ask us to believe that
* the page itself is supported, but incorrectly
* reports an ability to manipulate data compression,
* so we'll assume that this device doesn't support
* compression. We can just fall through for that.
*/
/* FALLTHROUGH */
default:
/*
* The drive doesn't seem to support compression,
* so turn off the set compression bit.
*/
params_to_set &= ~SA_PARAM_COMPRESSION;
xpt_print(periph->path,
"device does not seem to support compression\n");
/*
* If that was the only thing the user wanted us to set,
* clean up allocated resources and return with
* 'operation not supported'.
*/
if (params_to_set == SA_PARAM_NONE) {
free(mode_buffer, M_SCSISA);
xpt_release_ccb(ccb);
return (ENODEV);
}
/*
* That wasn't the only thing the user wanted us to set.
* So, decrease the stated mode buffer length by the
* size of the compression mode page.
*/
mode_buffer_len -= sizeof(sa_comp_t);
}
}
/* It is safe to retry this operation */
scsi_mode_select(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG,
(params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0,
sense_flags, softc->device_stats);
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
int idx;
char *xyz = mode_buffer;
xpt_print_path(periph->path);
printf("Err%d, Mode Select Data=", error);
for (idx = 0; idx < mode_buffer_len; idx++)
printf(" 0x%02x", xyz[idx] & 0xff);
printf("\n");
}
if (error) {
/*
* If we can, try without setting density/blocksize.
*/
if (mode_blk) {
if ((params_to_set &
(SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
mode_blk = NULL;
goto retry;
}
} else {
mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
cpage = (sa_comp_t *)&mode_blk[1];
}
/*
* If we were setting the blocksize, and that failed, we
* want to set it to its original value. If we weren't
* setting the blocksize, we don't want to change it.
*/
scsi_ulto3b(current_blocksize, mode_blk->blklen);
/*
* Set density if requested, else preserve old density.
* SCSI_SAME_DENSITY only applies to SCSI-2 or better
* devices, else density we've latched up in our softc.
*/
if (params_to_set & SA_PARAM_DENSITY) {
mode_blk->density = current_density;
} else if (softc->scsi_rev > SCSI_REV_CCS) {
mode_blk->density = SCSI_SAME_DENSITY;
} else {
mode_blk->density = softc->media_density;
}
if (params_to_set & SA_PARAM_COMPRESSION)
bcopy(ccomp, cpage, sizeof (sa_comp_t));
/*
* The retry count is the only CCB field that might have been
* changed that we care about, so reset it back to 1.
*/
ccb->ccb_h.retry_count = 1;
cam_periph_runccb(ccb, saerror, 0, sense_flags,
softc->device_stats);
}
xpt_release_ccb(ccb);
if (ccomp != NULL)
free(ccomp, M_SCSISA);
if (params_to_set & SA_PARAM_COMPRESSION) {
if (error) {
softc->flags &= ~SA_FLAG_COMP_ENABLED;
/*
* Even if we get an error setting compression,
* do not say that we don't support it. We could
* have been wrong, or it may be media specific.
* softc->flags &= ~SA_FLAG_COMP_SUPP;
*/
softc->saved_comp_algorithm = softc->comp_algorithm;
softc->comp_algorithm = 0;
} else {
softc->flags |= SA_FLAG_COMP_ENABLED;
softc->comp_algorithm = calg;
}
}
free(mode_buffer, M_SCSISA);
return (error);
}
static int
saextget(struct cdev *dev, struct cam_periph *periph, struct sbuf *sb,
struct mtextget *g)
{
int indent, error;
char tmpstr[80];
struct sa_softc *softc;
int tmpint;
uint32_t maxio_tmp;
struct ccb_getdev cgd;
softc = (struct sa_softc *)periph->softc;
error = 0;
error = sagetparams_common(dev, periph);
if (error)
goto extget_bailout;
if (!SA_IS_CTRL(dev) && !softc->open_pending_mount)
sagetpos(periph);
indent = 0;
SASBADDNODE(sb, indent, mtextget);
/*
* Basic CAM peripheral information.
*/
SASBADDVARSTR(sb, indent, periph->periph_name, %s, periph_name,
strlen(periph->periph_name) + 1);
SASBADDUINT(sb, indent, periph->unit_number, %u, unit_number);
xpt_setup_ccb(&cgd.ccb_h,
periph->path,
CAM_PRIORITY_NORMAL);
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
xpt_action((union ccb *)&cgd);
if ((cgd.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
g->status = MT_EXT_GET_ERROR;
snprintf(g->error_str, sizeof(g->error_str),
"Error %#x returned for XPT_GDEV_TYPE CCB",
cgd.ccb_h.status);
goto extget_bailout;
}
cam_strvis(tmpstr, cgd.inq_data.vendor,
sizeof(cgd.inq_data.vendor), sizeof(tmpstr));
SASBADDVARSTRDESC(sb, indent, tmpstr, %s, vendor,
sizeof(cgd.inq_data.vendor) + 1, "SCSI Vendor ID");
cam_strvis(tmpstr, cgd.inq_data.product,
sizeof(cgd.inq_data.product), sizeof(tmpstr));
SASBADDVARSTRDESC(sb, indent, tmpstr, %s, product,
sizeof(cgd.inq_data.product) + 1, "SCSI Product ID");
cam_strvis(tmpstr, cgd.inq_data.revision,
sizeof(cgd.inq_data.revision), sizeof(tmpstr));
SASBADDVARSTRDESC(sb, indent, tmpstr, %s, revision,
sizeof(cgd.inq_data.revision) + 1, "SCSI Revision");
if (cgd.serial_num_len > 0) {
char *tmpstr2;
size_t ts2_len;
int ts2_malloc;
ts2_len = 0;
if (cgd.serial_num_len > sizeof(tmpstr)) {
ts2_len = cgd.serial_num_len + 1;
ts2_malloc = 1;
tmpstr2 = malloc(ts2_len, M_SCSISA, M_NOWAIT | M_ZERO);
/*
* The 80 characters allocated on the stack above
* will handle the vast majority of serial numbers.
* If we run into one that is larger than that, and
* we can't malloc the length without blocking,
* bail out with an out of memory error.
*/
if (tmpstr2 == NULL) {
error = ENOMEM;
goto extget_bailout;
}
} else {
ts2_len = sizeof(tmpstr);
ts2_malloc = 0;
tmpstr2 = tmpstr;
}
cam_strvis(tmpstr2, cgd.serial_num, cgd.serial_num_len,
ts2_len);
SASBADDVARSTRDESC(sb, indent, tmpstr2, %s, serial_num,
(ssize_t)cgd.serial_num_len + 1, "Serial Number");
if (ts2_malloc != 0)
free(tmpstr2, M_SCSISA);
} else {
/*
* We return a serial_num element in any case, but it will
* be empty if the device has no serial number.
*/
tmpstr[0] = '\0';
SASBADDVARSTRDESC(sb, indent, tmpstr, %s, serial_num,
(ssize_t)0, "Serial Number");
}
SASBADDUINTDESC(sb, indent, softc->maxio, %u, maxio,
"Maximum I/O size allowed by driver and controller");
SASBADDUINTDESC(sb, indent, softc->cpi_maxio, %u, cpi_maxio,
"Maximum I/O size reported by controller");
SASBADDUINTDESC(sb, indent, softc->max_blk, %u, max_blk,
"Maximum block size supported by tape drive and media");
SASBADDUINTDESC(sb, indent, softc->min_blk, %u, min_blk,
"Minimum block size supported by tape drive and media");
SASBADDUINTDESC(sb, indent, softc->blk_gran, %u, blk_gran,
"Block granularity supported by tape drive and media");
maxio_tmp = min(softc->max_blk, softc->maxio);
SASBADDUINTDESC(sb, indent, maxio_tmp, %u, max_effective_iosize,
"Maximum possible I/O size");
SASBADDINTDESC(sb, indent, softc->flags & SA_FLAG_FIXED ? 1 : 0, %d,
fixed_mode, "Set to 1 for fixed block mode, 0 for variable block");
/*
* XXX KDM include SIM, bus, target, LUN?
*/
if (softc->flags & SA_FLAG_COMP_UNSUPP)
tmpint = 0;
else
tmpint = 1;
SASBADDINTDESC(sb, indent, tmpint, %d, compression_supported,
"Set to 1 if compression is supported, 0 if not");
if (softc->flags & SA_FLAG_COMP_ENABLED)
tmpint = 1;
else
tmpint = 0;
SASBADDINTDESC(sb, indent, tmpint, %d, compression_enabled,
"Set to 1 if compression is enabled, 0 if not");
SASBADDUINTDESC(sb, indent, softc->comp_algorithm, %u,
compression_algorithm, "Numeric compression algorithm");
safillprot(softc, &indent, sb);
SASBADDUINTDESC(sb, indent, softc->media_blksize, %u,
media_blocksize, "Block size reported by drive or set by user");
SASBADDINTDESC(sb, indent, (intmax_t)softc->fileno, %jd,
calculated_fileno, "Calculated file number, -1 if unknown");
SASBADDINTDESC(sb, indent, (intmax_t)softc->blkno, %jd,
calculated_rel_blkno, "Calculated block number relative to file, "
"set to -1 if unknown");
SASBADDINTDESC(sb, indent, (intmax_t)softc->rep_fileno, %jd,
reported_fileno, "File number reported by drive, -1 if unknown");
SASBADDINTDESC(sb, indent, (intmax_t)softc->rep_blkno, %jd,
reported_blkno, "Block number relative to BOP/BOT reported by "
"drive, -1 if unknown");
SASBADDINTDESC(sb, indent, (intmax_t)softc->partition, %jd,
partition, "Current partition number, 0 is the default");
SASBADDINTDESC(sb, indent, softc->bop, %d, bop,
"Set to 1 if drive is at the beginning of partition/tape, 0 if "
"not, -1 if unknown");
SASBADDINTDESC(sb, indent, softc->eop, %d, eop,
"Set to 1 if drive is past early warning, 0 if not, -1 if unknown");
SASBADDINTDESC(sb, indent, softc->bpew, %d, bpew,
"Set to 1 if drive is past programmable early warning, 0 if not, "
"-1 if unknown");
SASBADDINTDESC(sb, indent, (intmax_t)softc->last_io_resid, %jd,
residual, "Residual for the last I/O");
/*
* XXX KDM should we send a string with the current driver
* status already decoded instead of a numeric value?
*/
SASBADDINTDESC(sb, indent, softc->dsreg, %d, dsreg,
"Current state of the driver");
safilldensitysb(softc, &indent, sb);
SASBENDNODE(sb, indent, mtextget);
extget_bailout:
return (error);
}
static int
saparamget(struct sa_softc *softc, struct sbuf *sb)
{
int indent;
indent = 0;
SASBADDNODE(sb, indent, mtparamget);
SASBADDINTDESC(sb, indent, softc->sili, %d, sili,
"Suppress an error on underlength variable reads");
SASBADDINTDESC(sb, indent, softc->eot_warn, %d, eot_warn,
"Return an error to warn that end of tape is approaching");
safillprot(softc, &indent, sb);
SASBENDNODE(sb, indent, mtparamget);
return (0);
}
static void
saprevent(struct cam_periph *periph, int action)
{
struct sa_softc *softc;
union ccb *ccb;
int error, sf;
softc = (struct sa_softc *)periph->softc;
if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
return;
if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
return;
/*
* We can be quiet about illegal requests.
*/
if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
sf = 0;
} else
sf = SF_QUIET_IR;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_prevent(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG, action,
SSD_FULL_SIZE, SCSIOP_TIMEOUT);
error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
if (error == 0) {
if (action == PR_ALLOW)
softc->flags &= ~SA_FLAG_TAPE_LOCKED;
else
softc->flags |= SA_FLAG_TAPE_LOCKED;
}
xpt_release_ccb(ccb);
}
static int
sarewind(struct cam_periph *periph)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_rewind(&ccb->csio, 2, NULL, MSG_SIMPLE_Q_TAG, FALSE,
SSD_FULL_SIZE, REWIND_TIMEOUT);
softc->dsreg = MTIO_DSREG_REW;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
if (error == 0) {
softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
softc->rep_fileno = softc->rep_blkno = (daddr_t) 0;
} else {
softc->fileno = softc->blkno = (daddr_t) -1;
softc->partition = (daddr_t) -1;
softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
}
return (error);
}
static int
saspace(struct cam_periph *periph, int count, scsi_space_code code)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* This cannot be retried */
scsi_space(&ccb->csio, 0, NULL, MSG_SIMPLE_Q_TAG, code, count,
SSD_FULL_SIZE, SPACE_TIMEOUT);
/*
* Clear residual because we will be using it.
*/
softc->last_ctl_resid = 0;
softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
/*
* If a spacing operation has failed, we need to invalidate
* this mount.
*
* If the spacing operation was setmarks or to end of recorded data,
* we no longer know our relative position.
*
* If the spacing operations was spacing files in reverse, we
* take account of the residual, but still check against less
* than zero- if we've gone negative, we must have hit BOT.
*
* If the spacing operations was spacing records in reverse and
* we have a residual, we've either hit BOT or hit a filemark.
* In the former case, we know our new record number (0). In
* the latter case, we have absolutely no idea what the real
* record number is- we've stopped between the end of the last
* record in the previous file and the filemark that stopped
* our spacing backwards.
*/
if (error) {
softc->fileno = softc->blkno = (daddr_t) -1;
softc->rep_blkno = softc->partition = (daddr_t) -1;
softc->rep_fileno = (daddr_t) -1;
} else if (code == SS_SETMARKS || code == SS_EOD) {
softc->fileno = softc->blkno = (daddr_t) -1;
} else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
softc->fileno += (count - softc->last_ctl_resid);
if (softc->fileno < 0) /* we must of hit BOT */
softc->fileno = 0;
softc->blkno = 0;
} else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
softc->blkno += (count - softc->last_ctl_resid);
if (count < 0) {
if (softc->last_ctl_resid || softc->blkno < 0) {
if (softc->fileno == 0) {
softc->blkno = 0;
} else {
softc->blkno = (daddr_t) -1;
}
}
}
}
if (error == 0)
sagetpos(periph);
return (error);
}
static int
sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks, int immed)
{
union ccb *ccb;
struct sa_softc *softc;
int error, nwm = 0;
softc = (struct sa_softc *)periph->softc;
if (softc->open_rdonly)
return (EBADF);
ccb = cam_periph_getccb(periph, 1);
/*
* Clear residual because we will be using it.
*/
softc->last_ctl_resid = 0;
softc->dsreg = MTIO_DSREG_FMK;
/* this *must* not be retried */
scsi_write_filemarks(&ccb->csio, 0, NULL, MSG_SIMPLE_Q_TAG,
immed, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
softc->dsreg = MTIO_DSREG_REST;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
if (error == 0 && nmarks) {
struct sa_softc *softc = (struct sa_softc *)periph->softc;
nwm = nmarks - softc->last_ctl_resid;
softc->filemarks += nwm;
}
xpt_release_ccb(ccb);
/*
* Update relative positions (if we're doing that).
*/
if (error) {
softc->fileno = softc->blkno = softc->partition = (daddr_t) -1;
} else if (softc->fileno != (daddr_t) -1) {
softc->fileno += nwm;
softc->blkno = 0;
}
/*
* Ask the tape drive for position information.
*/
sagetpos(periph);
/*
* If we got valid position information, since we just wrote a file
* mark, we know we're at the file mark and block 0 after that
* filemark.
*/
if (softc->rep_fileno != (daddr_t) -1) {
softc->fileno = softc->rep_fileno;
softc->blkno = 0;
}
return (error);
}
static int
sagetpos(struct cam_periph *periph)
{
union ccb *ccb;
struct scsi_tape_position_long_data long_pos;
struct sa_softc *softc = (struct sa_softc *)periph->softc;
int error;
if (softc->quirks & SA_QUIRK_NO_LONG_POS) {
softc->rep_fileno = (daddr_t) -1;
softc->rep_blkno = (daddr_t) -1;
softc->bop = softc->eop = softc->bpew = -1;
return (EOPNOTSUPP);
}
bzero(&long_pos, sizeof(long_pos));
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
scsi_read_position_10(&ccb->csio,
/*retries*/ 1,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*service_action*/ SA_RPOS_LONG_FORM,
/*data_ptr*/ (uint8_t *)&long_pos,
/*length*/ sizeof(long_pos),
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ SCSIOP_TIMEOUT);
softc->dsreg = MTIO_DSREG_RBSY;
error = cam_periph_runccb(ccb, saerror, 0, SF_QUIET_IR,
softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if (error == 0) {
if (long_pos.flags & SA_RPOS_LONG_MPU) {
/*
* If the drive doesn't know what file mark it is
* on, our calculated filemark isn't going to be
* accurate either.
*/
softc->fileno = (daddr_t) -1;
softc->rep_fileno = (daddr_t) -1;
} else {
softc->fileno = softc->rep_fileno =
scsi_8btou64(long_pos.logical_file_num);
}
if (long_pos.flags & SA_RPOS_LONG_LONU) {
softc->partition = (daddr_t) -1;
softc->rep_blkno = (daddr_t) -1;
/*
* If the tape drive doesn't know its block
* position, we can't claim to know it either.
*/
softc->blkno = (daddr_t) -1;
} else {
softc->partition = scsi_4btoul(long_pos.partition);
softc->rep_blkno =
scsi_8btou64(long_pos.logical_object_num);
}
if (long_pos.flags & SA_RPOS_LONG_BOP)
softc->bop = 1;
else
softc->bop = 0;
if (long_pos.flags & SA_RPOS_LONG_EOP)
softc->eop = 1;
else
softc->eop = 0;
if ((long_pos.flags & SA_RPOS_LONG_BPEW)
|| (softc->set_pews_status != 0)) {
softc->bpew = 1;
if (softc->set_pews_status > 0)
softc->set_pews_status--;
} else
softc->bpew = 0;
} else if (error == EINVAL) {
/*
* If this drive returned an invalid-request type error,
* then it likely doesn't support the long form report.
*/
softc->quirks |= SA_QUIRK_NO_LONG_POS;
}
if (error != 0) {
softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
softc->partition = (daddr_t) -1;
softc->bop = softc->eop = softc->bpew = -1;
}
xpt_release_ccb(ccb);
return (error);
}
static int
sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
{
struct scsi_tape_position_data loc;
union ccb *ccb;
struct sa_softc *softc = (struct sa_softc *)periph->softc;
int error;
/*
* We try and flush any buffered writes here if we were writing
* and we're trying to get hardware block position. It eats
* up performance substantially, but I'm wary of drive firmware.
*
* I think that *logical* block position is probably okay-
* but hardware block position might have to wait for data
* to hit media to be valid. Caveat Emptor.
*/
if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
error = sawritefilemarks(periph, 0, 0, 0);
if (error && error != EACCES)
return (error);
}
ccb = cam_periph_getccb(periph, 1);
scsi_read_position(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG,
hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
softc->dsreg = MTIO_DSREG_RBSY;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
if (error == 0) {
if (loc.flags & SA_RPOS_UNCERTAIN) {
error = EINVAL; /* nothing is certain */
} else {
*blkptr = scsi_4btoul(loc.firstblk);
}
}
xpt_release_ccb(ccb);
return (error);
}
static int
sasetpos(struct cam_periph *periph, int hard, struct mtlocate *locate_info)
{
union ccb *ccb;
struct sa_softc *softc;
int locate16;
int immed, cp;
int error;
/*
* We used to try and flush any buffered writes here.
* Now we push this onto user applications to either
* flush the pending writes themselves (via a zero count
* WRITE FILEMARKS command) or they can trust their tape
* drive to do this correctly for them.
*/
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
cp = locate_info->flags & MT_LOCATE_FLAG_CHANGE_PART ? 1 : 0;
immed = locate_info->flags & MT_LOCATE_FLAG_IMMED ? 1 : 0;
/*
* Determine whether we have to use LOCATE or LOCATE16. The hard
* bit is only possible with LOCATE, but the new ioctls do not
* allow setting that bit. So we can't get into the situation of
* having the hard bit set with a block address that is larger than
* 32-bits.
*/
if (hard != 0)
locate16 = 0;
else if ((locate_info->dest_type != MT_LOCATE_DEST_OBJECT)
|| (locate_info->block_address_mode != MT_LOCATE_BAM_IMPLICIT)
|| (locate_info->logical_id > SA_SPOS_MAX_BLK))
locate16 = 1;
else
locate16 = 0;
if (locate16 != 0) {
scsi_locate_16(&ccb->csio,
/*retries*/ 1,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*immed*/ immed,
/*cp*/ cp,
/*dest_type*/ locate_info->dest_type,
/*bam*/ locate_info->block_address_mode,
/*partition*/ locate_info->partition,
/*logical_id*/ locate_info->logical_id,
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ SPACE_TIMEOUT);
} else {
scsi_locate_10(&ccb->csio,
/*retries*/ 1,
/*cbfcnp*/ NULL,
/*tag_action*/ MSG_SIMPLE_Q_TAG,
/*immed*/ immed,
/*cp*/ cp,
/*hard*/ hard,
/*partition*/ locate_info->partition,
/*block_address*/ locate_info->logical_id,
/*sense_len*/ SSD_FULL_SIZE,
/*timeout*/ SPACE_TIMEOUT);
}
softc->dsreg = MTIO_DSREG_POS;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
/*
* We assume the calculated file and block numbers are unknown
* unless we have enough information to populate them.
*/
softc->fileno = softc->blkno = (daddr_t) -1;
/*
* If the user requested changing the partition and the request
* succeeded, note the partition.
*/
if ((error == 0)
&& (cp != 0))
softc->partition = locate_info->partition;
else
softc->partition = (daddr_t) -1;
if (error == 0) {
switch (locate_info->dest_type) {
case MT_LOCATE_DEST_FILE:
/*
* This is the only case where we can reliably
* calculate the file and block numbers.
*/
softc->fileno = locate_info->logical_id;
softc->blkno = 0;
break;
case MT_LOCATE_DEST_OBJECT:
case MT_LOCATE_DEST_SET:
case MT_LOCATE_DEST_EOD:
default:
break;
}
}
/*
* Ask the drive for current position information.
*/
sagetpos(periph);
return (error);
}
static int
saretension(struct cam_periph *periph)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_load_unload(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
softc->dsreg = MTIO_DSREG_TEN;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
if (error == 0) {
softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
sagetpos(periph);
} else
softc->partition = softc->fileno = softc->blkno = (daddr_t) -1;
return (error);
}
static int
sareservereleaseunit(struct cam_periph *periph, int reserve)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_reserve_release_unit(&ccb->csio, 2, NULL, MSG_SIMPLE_Q_TAG,
FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve);
softc->dsreg = MTIO_DSREG_RBSY;
error = cam_periph_runccb(ccb, saerror, 0,
SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
/*
* If the error was Illegal Request, then the device doesn't support
* RESERVE/RELEASE. This is not an error.
*/
if (error == EINVAL) {
error = 0;
}
return (error);
}
static int
saloadunload(struct cam_periph *periph, int load)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
ccb = cam_periph_getccb(periph, 1);
/* It is safe to retry this operation */
scsi_load_unload(&ccb->csio, 5, NULL, MSG_SIMPLE_Q_TAG, FALSE,
FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
if (error || load == 0) {
softc->partition = softc->fileno = softc->blkno = (daddr_t) -1;
softc->rep_fileno = softc->rep_blkno = (daddr_t) -1;
} else if (error == 0) {
softc->partition = softc->fileno = softc->blkno = (daddr_t) 0;
sagetpos(periph);
}
return (error);
}
static int
saerase(struct cam_periph *periph, int longerase)
{
union ccb *ccb;
struct sa_softc *softc;
int error;
softc = (struct sa_softc *)periph->softc;
if (softc->open_rdonly)
return (EBADF);
ccb = cam_periph_getccb(periph, 1);
scsi_erase(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, FALSE, longerase,
SSD_FULL_SIZE, ERASE_TIMEOUT);
softc->dsreg = MTIO_DSREG_ZER;
error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
softc->dsreg = MTIO_DSREG_REST;
xpt_release_ccb(ccb);
return (error);
}
/*
* Fill an sbuf with density data in XML format. This particular macro
* works for multi-byte integer fields.
*
* Note that 1 byte fields aren't supported here. The reason is that the
* compiler does not evaluate the sizeof(), and assumes that any of the
* sizes are possible for a given field. So passing in a multi-byte
* field will result in a warning that the assignment makes an integer
* from a pointer without a cast, if there is an assignment in the 1 byte
* case.
*/
#define SAFILLDENSSB(dens_data, sb, indent, field, desc_remain, \
len_to_go, cur_offset, desc){ \
size_t cur_field_len; \
\
cur_field_len = sizeof(dens_data->field); \
if (desc_remain < cur_field_len) { \
len_to_go -= desc_remain; \
cur_offset += desc_remain; \
continue; \
} \
len_to_go -= cur_field_len; \
cur_offset += cur_field_len; \
desc_remain -= cur_field_len; \
\
switch (sizeof(dens_data->field)) { \
case 1: \
KASSERT(1 == 0, ("Programmer error, invalid 1 byte " \
"field width for SAFILLDENSFIELD")); \
break; \
case 2: \
SASBADDUINTDESC(sb, indent, \
scsi_2btoul(dens_data->field), %u, field, desc); \
break; \
case 3: \
SASBADDUINTDESC(sb, indent, \
scsi_3btoul(dens_data->field), %u, field, desc); \
break; \
case 4: \
SASBADDUINTDESC(sb, indent, \
scsi_4btoul(dens_data->field), %u, field, desc); \
break; \
case 8: \
SASBADDUINTDESC(sb, indent, \
(uintmax_t)scsi_8btou64(dens_data->field), %ju, \
field, desc); \
break; \
default: \
break; \
} \
};
/*
* Fill an sbuf with density data in XML format. This particular macro
* works for strings.
*/
#define SAFILLDENSSBSTR(dens_data, sb, indent, field, desc_remain, \
len_to_go, cur_offset, desc){ \
size_t cur_field_len; \
char tmpstr[32]; \
\
cur_field_len = sizeof(dens_data->field); \
if (desc_remain < cur_field_len) { \
len_to_go -= desc_remain; \
cur_offset += desc_remain; \
continue; \
} \
len_to_go -= cur_field_len; \
cur_offset += cur_field_len; \
desc_remain -= cur_field_len; \
\
cam_strvis(tmpstr, dens_data->field, \
sizeof(dens_data->field), sizeof(tmpstr)); \
SASBADDVARSTRDESC(sb, indent, tmpstr, %s, field, \
strlen(tmpstr) + 1, desc); \
};
/*
* Fill an sbuf with density data descriptors.
*/
static void
safilldenstypesb(struct sbuf *sb, int *indent, uint8_t *buf, int buf_len,
int is_density)
{
struct scsi_density_hdr *hdr;
uint32_t hdr_len;
int len_to_go, cur_offset;
int length_offset;
int num_reports, need_close;
/*
* We need at least the header length. Note that this isn't an
* error, not all tape drives will have every data type.
*/
if (buf_len < sizeof(*hdr))
goto bailout;
hdr = (struct scsi_density_hdr *)buf;
hdr_len = scsi_2btoul(hdr->length);
len_to_go = min(buf_len - sizeof(*hdr), hdr_len);
if (is_density) {
length_offset = __offsetof(struct scsi_density_data,
bits_per_mm);
} else {
length_offset = __offsetof(struct scsi_medium_type_data,
num_density_codes);
}
cur_offset = sizeof(*hdr);
num_reports = 0;
need_close = 0;
while (len_to_go > length_offset) {
struct scsi_density_data *dens_data;
struct scsi_medium_type_data *type_data;
int desc_remain;
size_t cur_field_len;
dens_data = NULL;
type_data = NULL;
if (is_density) {
dens_data =(struct scsi_density_data *)&buf[cur_offset];
if (dens_data->byte2 & SDD_DLV)
desc_remain = scsi_2btoul(dens_data->length);
else
desc_remain = SDD_DEFAULT_LENGTH -
length_offset;
} else {
type_data = (struct scsi_medium_type_data *)
&buf[cur_offset];
desc_remain = scsi_2btoul(type_data->length);
}
len_to_go -= length_offset;
desc_remain = min(desc_remain, len_to_go);
cur_offset += length_offset;
if (need_close != 0) {
SASBENDNODE(sb, *indent, density_entry);
}
SASBADDNODENUM(sb, *indent, density_entry, num_reports);
num_reports++;
need_close = 1;
if (is_density) {
SASBADDUINTDESC(sb, *indent,
dens_data->primary_density_code, %u,
primary_density_code, "Primary Density Code");
SASBADDUINTDESC(sb, *indent,
dens_data->secondary_density_code, %u,
secondary_density_code, "Secondary Density Code");
SASBADDUINTDESC(sb, *indent,
dens_data->byte2 & ~SDD_DLV, %#x, density_flags,
"Density Flags");
SAFILLDENSSB(dens_data, sb, *indent, bits_per_mm,
desc_remain, len_to_go, cur_offset, "Bits per mm");
SAFILLDENSSB(dens_data, sb, *indent, media_width,
desc_remain, len_to_go, cur_offset, "Media width");
SAFILLDENSSB(dens_data, sb, *indent, tracks,
desc_remain, len_to_go, cur_offset,
"Number of Tracks");
SAFILLDENSSB(dens_data, sb, *indent, capacity,
desc_remain, len_to_go, cur_offset, "Capacity");
SAFILLDENSSBSTR(dens_data, sb, *indent, assigning_org,
desc_remain, len_to_go, cur_offset,
"Assigning Organization");
SAFILLDENSSBSTR(dens_data, sb, *indent, density_name,
desc_remain, len_to_go, cur_offset, "Density Name");
SAFILLDENSSBSTR(dens_data, sb, *indent, description,
desc_remain, len_to_go, cur_offset, "Description");
} else {
int i;
SASBADDUINTDESC(sb, *indent, type_data->medium_type,
%u, medium_type, "Medium Type");
cur_field_len =
__offsetof(struct scsi_medium_type_data,
media_width) -
__offsetof(struct scsi_medium_type_data,
num_density_codes);
if (desc_remain < cur_field_len) {
len_to_go -= desc_remain;
cur_offset += desc_remain;
continue;
}
len_to_go -= cur_field_len;
cur_offset += cur_field_len;
desc_remain -= cur_field_len;
SASBADDINTDESC(sb, *indent,
type_data->num_density_codes, %d,
num_density_codes, "Number of Density Codes");
SASBADDNODE(sb, *indent, density_code_list);
for (i = 0; i < type_data->num_density_codes;
i++) {
SASBADDUINTDESC(sb, *indent,
type_data->primary_density_codes[i], %u,
density_code, "Density Code");
}
SASBENDNODE(sb, *indent, density_code_list);
SAFILLDENSSB(type_data, sb, *indent, media_width,
desc_remain, len_to_go, cur_offset,
"Media width");
SAFILLDENSSB(type_data, sb, *indent, medium_length,
desc_remain, len_to_go, cur_offset,
"Medium length");
/*
* Account for the two reserved bytes.
*/
cur_field_len = sizeof(type_data->reserved2);
if (desc_remain < cur_field_len) {
len_to_go -= desc_remain;
cur_offset += desc_remain;
continue;
}
len_to_go -= cur_field_len;
cur_offset += cur_field_len;
desc_remain -= cur_field_len;
SAFILLDENSSBSTR(type_data, sb, *indent, assigning_org,
desc_remain, len_to_go, cur_offset,
"Assigning Organization");
SAFILLDENSSBSTR(type_data, sb, *indent,
medium_type_name, desc_remain, len_to_go,
cur_offset, "Medium type name");
SAFILLDENSSBSTR(type_data, sb, *indent, description,
desc_remain, len_to_go, cur_offset, "Description");
}
}
if (need_close != 0) {
SASBENDNODE(sb, *indent, density_entry);
}
bailout:
return;
}
/*
* Fill an sbuf with density data information
*/
static void
safilldensitysb(struct sa_softc *softc, int *indent, struct sbuf *sb)
{
int i, is_density;
SASBADDNODE(sb, *indent, mtdensity);
SASBADDUINTDESC(sb, *indent, softc->media_density, %u, media_density,
"Current Medium Density");
is_density = 0;
for (i = 0; i < SA_DENSITY_TYPES; i++) {
int tmpint;
if (softc->density_info_valid[i] == 0)
continue;
SASBADDNODE(sb, *indent, density_report);
if (softc->density_type_bits[i] & SRDS_MEDIUM_TYPE) {
tmpint = 1;
is_density = 0;
} else {
tmpint = 0;
is_density = 1;
}
SASBADDINTDESC(sb, *indent, tmpint, %d, medium_type_report,
"Medium type report");
if (softc->density_type_bits[i] & SRDS_MEDIA)
tmpint = 1;
else
tmpint = 0;
SASBADDINTDESC(sb, *indent, tmpint, %d, media_report,
"Media report");
safilldenstypesb(sb, indent, softc->density_info[i],
softc->density_info_valid[i], is_density);
SASBENDNODE(sb, *indent, density_report);
}
SASBENDNODE(sb, *indent, mtdensity);
}
#endif /* _KERNEL */
/*
* Read tape block limits command.
*/
void
scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action,
struct scsi_read_block_limits_data *rlimit_buf,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_read_block_limits *scsi_cmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
(u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
sizeof(*scsi_cmd), timeout);
scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = READ_BLOCK_LIMITS;
}
void
scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int readop, int sli,
int fixed, u_int32_t length, u_int8_t *data_ptr,
u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_sa_rw *scsi_cmd;
int read;
read = (readop & SCSI_RW_DIRMASK) == SCSI_RW_READ;
scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
scsi_cmd->opcode = read ? SA_READ : SA_WRITE;
scsi_cmd->sli_fixed = 0;
if (sli && read)
scsi_cmd->sli_fixed |= SAR_SLI;
if (fixed)
scsi_cmd->sli_fixed |= SARW_FIXED;
scsi_ulto3b(length, scsi_cmd->length);
scsi_cmd->control = 0;
cam_fill_csio(csio, retries, cbfcnp, (read ? CAM_DIR_IN : CAM_DIR_OUT) |
((readop & SCSI_RW_BIO) != 0 ? CAM_DATA_BIO : 0),
tag_action, data_ptr, dxfer_len, sense_len,
sizeof(*scsi_cmd), timeout);
}
void
scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int eot,
int reten, int load, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_load_unload *scsi_cmd;
scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = LOAD_UNLOAD;
if (immediate)
scsi_cmd->immediate = SLU_IMMED;
if (eot)
scsi_cmd->eot_reten_load |= SLU_EOT;
if (reten)
scsi_cmd->eot_reten_load |= SLU_RETEN;
if (load)
scsi_cmd->eot_reten_load |= SLU_LOAD;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_rewind *scsi_cmd;
scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = REWIND;
if (immediate)
scsi_cmd->immediate = SREW_IMMED;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, scsi_space_code code,
u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_space *scsi_cmd;
scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
scsi_cmd->opcode = SPACE;
scsi_cmd->code = code;
scsi_ulto3b(count, scsi_cmd->count);
scsi_cmd->control = 0;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int setmark,
u_int32_t num_marks, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_write_filemarks *scsi_cmd;
scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = WRITE_FILEMARKS;
if (immediate)
scsi_cmd->byte2 |= SWFMRK_IMMED;
if (setmark)
scsi_cmd->byte2 |= SWFMRK_WSMK;
scsi_ulto3b(num_marks, scsi_cmd->num_marks);
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
/*
* The reserve and release unit commands differ only by their opcodes.
*/
void
scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int third_party,
int third_party_id, u_int8_t sense_len,
u_int32_t timeout, int reserve)
{
struct scsi_reserve_release_unit *scsi_cmd;
scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
if (reserve)
scsi_cmd->opcode = RESERVE_UNIT;
else
scsi_cmd->opcode = RELEASE_UNIT;
if (third_party) {
scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
scsi_cmd->lun_thirdparty |=
((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
}
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
void
scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immediate, int long_erase,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_erase *scsi_cmd;
scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = ERASE;
if (immediate)
scsi_cmd->lun_imm_long |= SE_IMMED;
if (long_erase)
scsi_cmd->lun_imm_long |= SE_LONG;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
0, sense_len, sizeof(*scsi_cmd), timeout);
}
/*
* Read Tape Position command.
*/
void
scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int hardsoft,
struct scsi_tape_position_data *sbp,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_tape_read_position *scmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
(u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = READ_POSITION;
scmd->byte1 = hardsoft;
}
/*
* Read Tape Position command.
*/
void
scsi_read_position_10(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int service_action,
u_int8_t *data_ptr, u_int32_t length,
u_int32_t sense_len, u_int32_t timeout)
{
struct scsi_tape_read_position *scmd;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/CAM_DIR_IN,
tag_action,
/*data_ptr*/data_ptr,
/*dxfer_len*/length,
sense_len,
sizeof(*scmd),
timeout);
scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = READ_POSITION;
scmd->byte1 = service_action;
/*
* The length is only currently set (as of SSC4r03) if the extended
* form is specified. The other forms have fixed lengths.
*/
if (service_action == SA_RPOS_EXTENDED_FORM)
scsi_ulto2b(length, scmd->length);
}
/*
* Set Tape Position command.
*/
void
scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int hardsoft, u_int32_t blkno,
u_int8_t sense_len, u_int32_t timeout)
{
struct scsi_tape_locate *scmd;
cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
(u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = LOCATE;
if (hardsoft)
scmd->byte1 |= SA_SPOS_BT;
scsi_ulto4b(blkno, scmd->blkaddr);
}
/*
* XXX KDM figure out how to make a compatibility function.
*/
void
scsi_locate_10(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immed, int cp, int hard,
int64_t partition, u_int32_t block_address,
int sense_len, u_int32_t timeout)
{
struct scsi_tape_locate *scmd;
cam_fill_csio(csio,
retries,
cbfcnp,
CAM_DIR_NONE,
tag_action,
/*data_ptr*/ NULL,
/*dxfer_len*/ 0,
sense_len,
sizeof(*scmd),
timeout);
scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
bzero(scmd, sizeof(*scmd));
scmd->opcode = LOCATE;
if (immed)
scmd->byte1 |= SA_SPOS_IMMED;
if (cp)
scmd->byte1 |= SA_SPOS_CP;
if (hard)
scmd->byte1 |= SA_SPOS_BT;
scsi_ulto4b(block_address, scmd->blkaddr);
scmd->partition = partition;
}
void
scsi_locate_16(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int immed, int cp, u_int8_t dest_type,
int bam, int64_t partition, u_int64_t logical_id,
int sense_len, u_int32_t timeout)
{
struct scsi_locate_16 *scsi_cmd;
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/CAM_DIR_NONE,
tag_action,
/*data_ptr*/NULL,
/*dxfer_len*/0,
sense_len,
sizeof(*scsi_cmd),
timeout);
scsi_cmd = (struct scsi_locate_16 *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = LOCATE_16;
if (immed)
scsi_cmd->byte1 |= SA_LC_IMMEDIATE;
if (cp)
scsi_cmd->byte1 |= SA_LC_CP;
scsi_cmd->byte1 |= (dest_type << SA_LC_DEST_TYPE_SHIFT);
scsi_cmd->byte2 |= bam;
scsi_cmd->partition = partition;
scsi_u64to8b(logical_id, scsi_cmd->logical_id);
}
void
scsi_report_density_support(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int media, int medium_type,
u_int8_t *data_ptr, u_int32_t length,
u_int32_t sense_len, u_int32_t timeout)
{
struct scsi_report_density_support *scsi_cmd;
scsi_cmd =(struct scsi_report_density_support *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = REPORT_DENSITY_SUPPORT;
if (media != 0)
scsi_cmd->byte1 |= SRDS_MEDIA;
if (medium_type != 0)
scsi_cmd->byte1 |= SRDS_MEDIUM_TYPE;
scsi_ulto2b(length, scsi_cmd->length);
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/CAM_DIR_IN,
tag_action,
/*data_ptr*/data_ptr,
/*dxfer_len*/length,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_set_capacity(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int byte1, u_int32_t proportion,
u_int32_t sense_len, u_int32_t timeout)
{
struct scsi_set_capacity *scsi_cmd;
scsi_cmd = (struct scsi_set_capacity *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = SET_CAPACITY;
scsi_cmd->byte1 = byte1;
scsi_ulto2b(proportion, scsi_cmd->cap_proportion);
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/CAM_DIR_NONE,
tag_action,
/*data_ptr*/NULL,
/*dxfer_len*/0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_format_medium(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int byte1, int byte2,
u_int8_t *data_ptr, u_int32_t dxfer_len,
u_int32_t sense_len, u_int32_t timeout)
{
struct scsi_format_medium *scsi_cmd;
scsi_cmd = (struct scsi_format_medium*)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = FORMAT_MEDIUM;
scsi_cmd->byte1 = byte1;
scsi_cmd->byte2 = byte2;
scsi_ulto2b(dxfer_len, scsi_cmd->length);
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/(dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
tag_action,
/*data_ptr*/ data_ptr,
/*dxfer_len*/ dxfer_len,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
void
scsi_allow_overwrite(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, int allow_overwrite, int partition,
u_int64_t logical_id, u_int32_t sense_len, u_int32_t timeout)
{
struct scsi_allow_overwrite *scsi_cmd;
scsi_cmd = (struct scsi_allow_overwrite *)&csio->cdb_io.cdb_bytes;
bzero(scsi_cmd, sizeof(*scsi_cmd));
scsi_cmd->opcode = ALLOW_OVERWRITE;
scsi_cmd->allow_overwrite = allow_overwrite;
scsi_cmd->partition = partition;
scsi_u64to8b(logical_id, scsi_cmd->logical_id);
cam_fill_csio(csio,
retries,
cbfcnp,
CAM_DIR_NONE,
tag_action,
/*data_ptr*/ NULL,
/*dxfer_len*/ 0,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
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