2005-01-05 22:34:37 +00:00
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/*-
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1999-01-14 06:00:29 +00:00
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* Implementation of the Target Mode 'Black Hole device' for CAM.
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*
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2017-11-27 15:12:43 +00:00
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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1999-01-14 06:00:29 +00:00
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* Copyright (c) 1999 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2003-06-10 18:14:05 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1999-01-14 06:00:29 +00:00
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/types.h>
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2000-05-05 09:59:14 +00:00
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#include <sys/bio.h>
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1999-01-14 06:00:29 +00:00
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#include <sys/conf.h>
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#include <sys/devicestat.h>
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#include <sys/malloc.h>
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#include <sys/uio.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_periph.h>
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#include <cam/cam_queue.h>
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#include <cam/cam_xpt_periph.h>
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#include <cam/cam_debug.h>
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2007-04-15 08:49:19 +00:00
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#include <cam/cam_sim.h>
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1999-01-14 06:00:29 +00:00
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#include <cam/scsi/scsi_all.h>
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#include <cam/scsi/scsi_message.h>
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2011-11-07 06:44:47 +00:00
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static MALLOC_DEFINE(M_SCSIBH, "SCSI bh", "SCSI blackhole buffers");
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2005-07-01 15:21:30 +00:00
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1999-01-14 06:00:29 +00:00
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typedef enum {
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TARGBH_STATE_NORMAL,
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TARGBH_STATE_EXCEPTION,
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TARGBH_STATE_TEARDOWN
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} targbh_state;
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typedef enum {
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TARGBH_FLAG_NONE = 0x00,
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TARGBH_FLAG_LUN_ENABLED = 0x01
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} targbh_flags;
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typedef enum {
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Merge CAM locking changes from the projects/camlock branch to radically
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.
Replace big per-SIM locks with bunch of smaller ones:
- per-LUN locks to protect device and peripheral drivers state;
- per-target locks to protect list of LUNs on target;
- per-bus locks to protect reference counting;
- per-send queue locks to protect queue of CCBs to be sent;
- per-done queue locks to protect queue of completed CCBs;
- remaining per-SIM locks now protect only HBA driver internals.
While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock. The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded. Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.
To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.
Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads. Load balanced
between them using "hash" of the device B:T:L address.
HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.
Sponsored by: iXsystems, Inc.
MFC after: 2 months
2013-10-21 12:00:26 +00:00
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TARGBH_CCB_WORKQ
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1999-01-14 06:00:29 +00:00
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} targbh_ccb_types;
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1999-03-05 23:21:28 +00:00
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#define MAX_ACCEPT 8
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1999-01-14 06:00:29 +00:00
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#define MAX_IMMEDIATE 16
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#define MAX_BUF_SIZE 256 /* Max inquiry/sense/mode page transfer */
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/* Offsets into our private CCB area for storing accept information */
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#define ccb_type ppriv_field0
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#define ccb_descr ppriv_ptr1
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/* We stick a pointer to the originating accept TIO in each continue I/O CCB */
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#define ccb_atio ppriv_ptr1
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2000-05-26 02:09:24 +00:00
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TAILQ_HEAD(ccb_queue, ccb_hdr);
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1999-01-14 06:00:29 +00:00
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struct targbh_softc {
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struct ccb_queue pending_queue;
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struct ccb_queue work_queue;
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struct ccb_queue unknown_atio_queue;
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struct devstat device_stats;
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targbh_state state;
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targbh_flags flags;
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u_int init_level;
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u_int inq_data_len;
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struct ccb_accept_tio *accept_tio_list;
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struct ccb_hdr_slist immed_notify_slist;
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};
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struct targbh_cmd_desc {
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struct ccb_accept_tio* atio_link;
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u_int data_resid; /* How much left to transfer */
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u_int data_increment;/* Amount to send before next disconnect */
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void* data; /* The data. Can be from backing_store or not */
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void* backing_store;/* Backing store allocated for this descriptor*/
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u_int max_size; /* Size of backing_store */
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u_int32_t timeout;
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u_int8_t status; /* Status to return to initiator */
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};
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static struct scsi_inquiry_data no_lun_inq_data =
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{
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T_NODEVICE | (SID_QUAL_BAD_LU << 5), 0,
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/* version */2, /* format version */2
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};
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Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.
Desriptor sense is a new sense data format that originated in SPC-3. Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.
This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.
This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.
camcontrol.c: Change uses of scsi_extract_sense() to use
scsi_extract_sense_len().
Use scsi_get_sks() instead of accessing sense key specific
data directly.
scsi_modes: Update the control mode page to the latest version (SPC-4).
scsi_cmds.c,
scsi_target.c: Change references to struct scsi_sense_data to struct
scsi_sense_data_fixed. This should be changed to allow the
user to specify fixed or descriptor sense, and then use
scsi_set_sense_data() to build the sense data.
ps3cdrom.c: Use scsi_set_sense_data() instead of setting sense data
manually.
cam_periph.c: Use scsi_extract_sense_len() instead of using
scsi_extract_sense() or accessing sense data directly.
cam_ccb.h: Bump the CAM_VERSION from 0x15 to 0x16. The change of
struct scsi_sense_data from 32 to 252 bytes changes the
size of struct ccb_scsiio, but not the size of union ccb.
So the version must be bumped to prevent structure
mis-matches.
scsi_all.h: Lots of updated SCSI sense data and other structures.
Add function prototypes for the new sense data functions.
Take out the inline implementation of scsi_extract_sense().
It is now too large to put in a header file.
Add macros to calculate whether fields are present and
filled in fixed and descriptor sense data
scsi_all.c: In scsi_op_desc(), allow the user to pass in NULL inquiry
data, and we'll assume a direct access device in that case.
Changed the SCSI RESERVED sense key name and description
to COMPLETED, as it is now defined in the spec.
Change the error recovery action for a number of read errors
to prevent lots of retries when the drive has said that the
block isn't accessible. This speeds up reconstruction of
the block by any RAID software running on top of the drive
(e.g. ZFS).
In scsi_sense_desc(), allow for invalid sense key numbers.
This allows calling this routine without checking the input
values first.
Change scsi_error_action() to use scsi_extract_sense_len(),
and handle things when invalid asc/ascq values are
encountered.
Add a new routine, scsi_desc_iterate(), that will call the
supplied function for every descriptor in descriptor format
sense data.
Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
which build descriptor and fixed format sense data. They
currently default to fixed format sense data.
Add a number of scsi_get_*() functions, which get different
types of sense data fields from either fixed or descriptor
format sense data, if the data is present.
Add a number of scsi_*_sbuf() functions, which print
formatted versions of various sense data fields. These
functions work for either fixed or descriptor sense.
Add a number of scsi_sense_*_sbuf() functions, which have a
standard calling interface and print the indicated field.
These functions take descriptors only.
Add scsi_sense_desc_sbuf(), which will print a formatted
version of the given sense descriptor.
Pull out a majority of the scsi_sense_sbuf() function and
put it into scsi_sense_only_sbuf(). This allows callers
that don't use struct ccb_scsiio to easily utilize the
printing routines. Revamp that function to handle
descriptor sense and use the new sense fetching and
printing routines.
Move scsi_extract_sense() into scsi_all.c, and implement it
in terms of the new function, scsi_extract_sense_len().
The _len() version takes a length (which should be the
sense length - residual) and can indicate which fields are
present and valid in the sense data.
Add a couple of new scsi_get_*() routines to get the sense
key, asc, and ascq only.
mly.c: Rename struct scsi_sense_data to struct
scsi_sense_data_fixed.
sbp_targ.c: Use the new sense fetching routines to get sense data
instead of accessing it directly.
sbp.c: Change the firewire/SCSI sense data transformation code to
use struct scsi_sense_data_fixed instead of struct
scsi_sense_data. This should be changed later to use
scsi_set_sense_data().
ciss.c: Calculate the sense residual properly. Use
scsi_get_sense_key() to fetch the sense key.
mps_sas.c,
mpt_cam.c: Set the sense residual properly.
iir.c: Use scsi_set_sense_data() instead of building sense data by
hand.
iscsi_subr.c: Use scsi_extract_sense_len() instead of grabbing sense data
directly.
umass.c: Use scsi_set_sense_data() to build sense data.
Grab the sense key using scsi_get_sense_key().
Calculate the sense residual properly.
isp_freebsd.h: Use scsi_get_*() routines to grab asc, ascq, and sense key
values.
Calculate and set the sense residual.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
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static struct scsi_sense_data_fixed no_lun_sense_data =
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1999-01-14 06:00:29 +00:00
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{
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SSD_CURRENT_ERROR|SSD_ERRCODE_VALID,
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0,
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SSD_KEY_NOT_READY,
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1999-03-05 23:21:28 +00:00
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{ 0, 0, 0, 0 },
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Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.
Desriptor sense is a new sense data format that originated in SPC-3. Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.
This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.
This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.
camcontrol.c: Change uses of scsi_extract_sense() to use
scsi_extract_sense_len().
Use scsi_get_sks() instead of accessing sense key specific
data directly.
scsi_modes: Update the control mode page to the latest version (SPC-4).
scsi_cmds.c,
scsi_target.c: Change references to struct scsi_sense_data to struct
scsi_sense_data_fixed. This should be changed to allow the
user to specify fixed or descriptor sense, and then use
scsi_set_sense_data() to build the sense data.
ps3cdrom.c: Use scsi_set_sense_data() instead of setting sense data
manually.
cam_periph.c: Use scsi_extract_sense_len() instead of using
scsi_extract_sense() or accessing sense data directly.
cam_ccb.h: Bump the CAM_VERSION from 0x15 to 0x16. The change of
struct scsi_sense_data from 32 to 252 bytes changes the
size of struct ccb_scsiio, but not the size of union ccb.
So the version must be bumped to prevent structure
mis-matches.
scsi_all.h: Lots of updated SCSI sense data and other structures.
Add function prototypes for the new sense data functions.
Take out the inline implementation of scsi_extract_sense().
It is now too large to put in a header file.
Add macros to calculate whether fields are present and
filled in fixed and descriptor sense data
scsi_all.c: In scsi_op_desc(), allow the user to pass in NULL inquiry
data, and we'll assume a direct access device in that case.
Changed the SCSI RESERVED sense key name and description
to COMPLETED, as it is now defined in the spec.
Change the error recovery action for a number of read errors
to prevent lots of retries when the drive has said that the
block isn't accessible. This speeds up reconstruction of
the block by any RAID software running on top of the drive
(e.g. ZFS).
In scsi_sense_desc(), allow for invalid sense key numbers.
This allows calling this routine without checking the input
values first.
Change scsi_error_action() to use scsi_extract_sense_len(),
and handle things when invalid asc/ascq values are
encountered.
Add a new routine, scsi_desc_iterate(), that will call the
supplied function for every descriptor in descriptor format
sense data.
Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
which build descriptor and fixed format sense data. They
currently default to fixed format sense data.
Add a number of scsi_get_*() functions, which get different
types of sense data fields from either fixed or descriptor
format sense data, if the data is present.
Add a number of scsi_*_sbuf() functions, which print
formatted versions of various sense data fields. These
functions work for either fixed or descriptor sense.
Add a number of scsi_sense_*_sbuf() functions, which have a
standard calling interface and print the indicated field.
These functions take descriptors only.
Add scsi_sense_desc_sbuf(), which will print a formatted
version of the given sense descriptor.
Pull out a majority of the scsi_sense_sbuf() function and
put it into scsi_sense_only_sbuf(). This allows callers
that don't use struct ccb_scsiio to easily utilize the
printing routines. Revamp that function to handle
descriptor sense and use the new sense fetching and
printing routines.
Move scsi_extract_sense() into scsi_all.c, and implement it
in terms of the new function, scsi_extract_sense_len().
The _len() version takes a length (which should be the
sense length - residual) and can indicate which fields are
present and valid in the sense data.
Add a couple of new scsi_get_*() routines to get the sense
key, asc, and ascq only.
mly.c: Rename struct scsi_sense_data to struct
scsi_sense_data_fixed.
sbp_targ.c: Use the new sense fetching routines to get sense data
instead of accessing it directly.
sbp.c: Change the firewire/SCSI sense data transformation code to
use struct scsi_sense_data_fixed instead of struct
scsi_sense_data. This should be changed later to use
scsi_set_sense_data().
ciss.c: Calculate the sense residual properly. Use
scsi_get_sense_key() to fetch the sense key.
mps_sas.c,
mpt_cam.c: Set the sense residual properly.
iir.c: Use scsi_set_sense_data() instead of building sense data by
hand.
iscsi_subr.c: Use scsi_extract_sense_len() instead of grabbing sense data
directly.
umass.c: Use scsi_set_sense_data() to build sense data.
Grab the sense key using scsi_get_sense_key().
Calculate the sense residual properly.
isp_freebsd.h: Use scsi_get_*() routines to grab asc, ascq, and sense key
values.
Calculate and set the sense residual.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
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/*extra_len*/offsetof(struct scsi_sense_data_fixed, fru)
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- offsetof(struct scsi_sense_data_fixed, extra_len),
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1999-03-05 23:21:28 +00:00
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{ 0, 0, 0, 0 },
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1999-01-14 06:00:29 +00:00
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/* Logical Unit Not Supported */
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/*ASC*/0x25, /*ASCQ*/0
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};
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|
|
|
|
|
Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.
Desriptor sense is a new sense data format that originated in SPC-3. Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.
This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.
This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.
camcontrol.c: Change uses of scsi_extract_sense() to use
scsi_extract_sense_len().
Use scsi_get_sks() instead of accessing sense key specific
data directly.
scsi_modes: Update the control mode page to the latest version (SPC-4).
scsi_cmds.c,
scsi_target.c: Change references to struct scsi_sense_data to struct
scsi_sense_data_fixed. This should be changed to allow the
user to specify fixed or descriptor sense, and then use
scsi_set_sense_data() to build the sense data.
ps3cdrom.c: Use scsi_set_sense_data() instead of setting sense data
manually.
cam_periph.c: Use scsi_extract_sense_len() instead of using
scsi_extract_sense() or accessing sense data directly.
cam_ccb.h: Bump the CAM_VERSION from 0x15 to 0x16. The change of
struct scsi_sense_data from 32 to 252 bytes changes the
size of struct ccb_scsiio, but not the size of union ccb.
So the version must be bumped to prevent structure
mis-matches.
scsi_all.h: Lots of updated SCSI sense data and other structures.
Add function prototypes for the new sense data functions.
Take out the inline implementation of scsi_extract_sense().
It is now too large to put in a header file.
Add macros to calculate whether fields are present and
filled in fixed and descriptor sense data
scsi_all.c: In scsi_op_desc(), allow the user to pass in NULL inquiry
data, and we'll assume a direct access device in that case.
Changed the SCSI RESERVED sense key name and description
to COMPLETED, as it is now defined in the spec.
Change the error recovery action for a number of read errors
to prevent lots of retries when the drive has said that the
block isn't accessible. This speeds up reconstruction of
the block by any RAID software running on top of the drive
(e.g. ZFS).
In scsi_sense_desc(), allow for invalid sense key numbers.
This allows calling this routine without checking the input
values first.
Change scsi_error_action() to use scsi_extract_sense_len(),
and handle things when invalid asc/ascq values are
encountered.
Add a new routine, scsi_desc_iterate(), that will call the
supplied function for every descriptor in descriptor format
sense data.
Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
which build descriptor and fixed format sense data. They
currently default to fixed format sense data.
Add a number of scsi_get_*() functions, which get different
types of sense data fields from either fixed or descriptor
format sense data, if the data is present.
Add a number of scsi_*_sbuf() functions, which print
formatted versions of various sense data fields. These
functions work for either fixed or descriptor sense.
Add a number of scsi_sense_*_sbuf() functions, which have a
standard calling interface and print the indicated field.
These functions take descriptors only.
Add scsi_sense_desc_sbuf(), which will print a formatted
version of the given sense descriptor.
Pull out a majority of the scsi_sense_sbuf() function and
put it into scsi_sense_only_sbuf(). This allows callers
that don't use struct ccb_scsiio to easily utilize the
printing routines. Revamp that function to handle
descriptor sense and use the new sense fetching and
printing routines.
Move scsi_extract_sense() into scsi_all.c, and implement it
in terms of the new function, scsi_extract_sense_len().
The _len() version takes a length (which should be the
sense length - residual) and can indicate which fields are
present and valid in the sense data.
Add a couple of new scsi_get_*() routines to get the sense
key, asc, and ascq only.
mly.c: Rename struct scsi_sense_data to struct
scsi_sense_data_fixed.
sbp_targ.c: Use the new sense fetching routines to get sense data
instead of accessing it directly.
sbp.c: Change the firewire/SCSI sense data transformation code to
use struct scsi_sense_data_fixed instead of struct
scsi_sense_data. This should be changed later to use
scsi_set_sense_data().
ciss.c: Calculate the sense residual properly. Use
scsi_get_sense_key() to fetch the sense key.
mps_sas.c,
mpt_cam.c: Set the sense residual properly.
iir.c: Use scsi_set_sense_data() instead of building sense data by
hand.
iscsi_subr.c: Use scsi_extract_sense_len() instead of grabbing sense data
directly.
umass.c: Use scsi_set_sense_data() to build sense data.
Grab the sense key using scsi_get_sense_key().
Calculate the sense residual properly.
isp_freebsd.h: Use scsi_get_*() routines to grab asc, ascq, and sense key
values.
Calculate and set the sense residual.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
|
|
|
static const int request_sense_size = offsetof(struct scsi_sense_data_fixed, fru);
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
static periph_init_t targbhinit;
|
|
|
|
|
static void targbhasync(void *callback_arg, u_int32_t code,
|
|
|
|
|
struct cam_path *path, void *arg);
|
|
|
|
|
static cam_status targbhenlun(struct cam_periph *periph);
|
|
|
|
|
static cam_status targbhdislun(struct cam_periph *periph);
|
|
|
|
|
static periph_ctor_t targbhctor;
|
|
|
|
|
static periph_dtor_t targbhdtor;
|
|
|
|
|
static periph_start_t targbhstart;
|
|
|
|
|
static void targbhdone(struct cam_periph *periph,
|
|
|
|
|
union ccb *done_ccb);
|
1999-03-05 23:21:28 +00:00
|
|
|
#ifdef NOTYET
|
1999-01-14 06:00:29 +00:00
|
|
|
static int targbherror(union ccb *ccb, u_int32_t cam_flags,
|
|
|
|
|
u_int32_t sense_flags);
|
1999-03-05 23:21:28 +00:00
|
|
|
#endif
|
1999-01-14 06:00:29 +00:00
|
|
|
static struct targbh_cmd_desc* targbhallocdescr(void);
|
|
|
|
|
static void targbhfreedescr(struct targbh_cmd_desc *buf);
|
|
|
|
|
|
|
|
|
|
static struct periph_driver targbhdriver =
|
|
|
|
|
{
|
|
|
|
|
targbhinit, "targbh",
|
|
|
|
|
TAILQ_HEAD_INITIALIZER(targbhdriver.units), /* generation */ 0
|
|
|
|
|
};
|
|
|
|
|
|
2001-02-07 07:05:59 +00:00
|
|
|
PERIPHDRIVER_DECLARE(targbh, targbhdriver);
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhinit(void)
|
|
|
|
|
{
|
|
|
|
|
cam_status status;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Install a global async callback. This callback will
|
|
|
|
|
* receive async callbacks like "new path registered".
|
|
|
|
|
*/
|
2007-05-16 16:54:23 +00:00
|
|
|
status = xpt_register_async(AC_PATH_REGISTERED | AC_PATH_DEREGISTERED,
|
|
|
|
|
targbhasync, NULL, NULL);
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
if (status != CAM_REQ_CMP) {
|
|
|
|
|
printf("targbh: Failed to attach master async callback "
|
|
|
|
|
"due to status 0x%x!\n", status);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhasync(void *callback_arg, u_int32_t code,
|
|
|
|
|
struct cam_path *path, void *arg)
|
|
|
|
|
{
|
2003-09-25 05:02:19 +00:00
|
|
|
struct cam_path *new_path;
|
2003-09-30 08:03:52 +00:00
|
|
|
struct ccb_pathinq *cpi;
|
|
|
|
|
path_id_t bus_path_id;
|
2003-09-25 05:02:19 +00:00
|
|
|
cam_status status;
|
|
|
|
|
|
2003-09-30 08:03:52 +00:00
|
|
|
cpi = (struct ccb_pathinq *)arg;
|
|
|
|
|
if (code == AC_PATH_REGISTERED)
|
|
|
|
|
bus_path_id = cpi->ccb_h.path_id;
|
|
|
|
|
else
|
|
|
|
|
bus_path_id = xpt_path_path_id(path);
|
2003-09-25 05:02:19 +00:00
|
|
|
/*
|
|
|
|
|
* Allocate a peripheral instance for
|
|
|
|
|
* this target instance.
|
|
|
|
|
*/
|
|
|
|
|
status = xpt_create_path(&new_path, NULL,
|
2003-09-30 08:03:52 +00:00
|
|
|
bus_path_id,
|
2003-09-25 05:02:19 +00:00
|
|
|
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
|
|
|
|
|
if (status != CAM_REQ_CMP) {
|
|
|
|
|
printf("targbhasync: Unable to create path "
|
|
|
|
|
"due to status 0x%x\n", status);
|
|
|
|
|
return;
|
|
|
|
|
}
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
switch (code) {
|
|
|
|
|
case AC_PATH_REGISTERED:
|
|
|
|
|
{
|
|
|
|
|
/* Only attach to controllers that support target mode */
|
|
|
|
|
if ((cpi->target_sprt & PIT_PROCESSOR) == 0)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
status = cam_periph_alloc(targbhctor, NULL, targbhdtor,
|
|
|
|
|
targbhstart,
|
|
|
|
|
"targbh", CAM_PERIPH_BIO,
|
|
|
|
|
new_path, targbhasync,
|
|
|
|
|
AC_PATH_REGISTERED,
|
|
|
|
|
cpi);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
case AC_PATH_DEREGISTERED:
|
|
|
|
|
{
|
2003-09-30 08:03:52 +00:00
|
|
|
struct cam_periph *periph;
|
|
|
|
|
|
|
|
|
|
if ((periph = cam_periph_find(new_path, "targbh")) != NULL)
|
|
|
|
|
cam_periph_invalidate(periph);
|
1999-01-14 06:00:29 +00:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
2003-09-25 05:02:19 +00:00
|
|
|
xpt_free_path(new_path);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Attempt to enable our lun */
|
|
|
|
|
static cam_status
|
|
|
|
|
targbhenlun(struct cam_periph *periph)
|
|
|
|
|
{
|
|
|
|
|
union ccb immed_ccb;
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
cam_status status;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
softc = (struct targbh_softc *)periph->softc;
|
|
|
|
|
|
|
|
|
|
if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) != 0)
|
|
|
|
|
return (CAM_REQ_CMP);
|
|
|
|
|
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&immed_ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
immed_ccb.ccb_h.func_code = XPT_EN_LUN;
|
|
|
|
|
|
|
|
|
|
/* Don't need support for any vendor specific commands */
|
|
|
|
|
immed_ccb.cel.grp6_len = 0;
|
|
|
|
|
immed_ccb.cel.grp7_len = 0;
|
|
|
|
|
immed_ccb.cel.enable = 1;
|
|
|
|
|
xpt_action(&immed_ccb);
|
|
|
|
|
status = immed_ccb.ccb_h.status;
|
|
|
|
|
if (status != CAM_REQ_CMP) {
|
2006-12-05 07:45:28 +00:00
|
|
|
xpt_print(periph->path,
|
|
|
|
|
"targbhenlun - Enable Lun Rejected with status 0x%x\n",
|
|
|
|
|
status);
|
1999-01-14 06:00:29 +00:00
|
|
|
return (status);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
softc->flags |= TARGBH_FLAG_LUN_ENABLED;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Build up a buffer of accept target I/O
|
|
|
|
|
* operations for incoming selections.
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < MAX_ACCEPT; i++) {
|
|
|
|
|
struct ccb_accept_tio *atio;
|
|
|
|
|
|
2005-07-01 15:21:30 +00:00
|
|
|
atio = (struct ccb_accept_tio*)malloc(sizeof(*atio), M_SCSIBH,
|
1999-01-14 06:00:29 +00:00
|
|
|
M_NOWAIT);
|
|
|
|
|
if (atio == NULL) {
|
|
|
|
|
status = CAM_RESRC_UNAVAIL;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
atio->ccb_h.ccb_descr = targbhallocdescr();
|
|
|
|
|
|
|
|
|
|
if (atio->ccb_h.ccb_descr == NULL) {
|
2005-07-01 15:21:30 +00:00
|
|
|
free(atio, M_SCSIBH);
|
1999-01-14 06:00:29 +00:00
|
|
|
status = CAM_RESRC_UNAVAIL;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&atio->ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
atio->ccb_h.func_code = XPT_ACCEPT_TARGET_IO;
|
|
|
|
|
atio->ccb_h.cbfcnp = targbhdone;
|
|
|
|
|
((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link =
|
|
|
|
|
softc->accept_tio_list;
|
|
|
|
|
softc->accept_tio_list = atio;
|
2013-09-01 11:50:37 +00:00
|
|
|
xpt_action((union ccb *)atio);
|
|
|
|
|
status = atio->ccb_h.status;
|
|
|
|
|
if (status != CAM_REQ_INPROG)
|
|
|
|
|
break;
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (i == 0) {
|
2006-12-05 07:45:28 +00:00
|
|
|
xpt_print(periph->path,
|
|
|
|
|
"targbhenlun - Could not allocate accept tio CCBs: status "
|
|
|
|
|
"= 0x%x\n", status);
|
1999-01-14 06:00:29 +00:00
|
|
|
targbhdislun(periph);
|
|
|
|
|
return (CAM_REQ_CMP_ERR);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Build up a buffer of immediate notify CCBs
|
|
|
|
|
* so the SIM can tell us of asynchronous target mode events.
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < MAX_ACCEPT; i++) {
|
2013-09-01 13:01:59 +00:00
|
|
|
struct ccb_immediate_notify *inot;
|
1999-01-14 06:00:29 +00:00
|
|
|
|
2013-09-01 13:01:59 +00:00
|
|
|
inot = (struct ccb_immediate_notify*)malloc(sizeof(*inot),
|
|
|
|
|
M_SCSIBH, M_NOWAIT);
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
if (inot == NULL) {
|
|
|
|
|
status = CAM_RESRC_UNAVAIL;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&inot->ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
2013-09-01 13:01:59 +00:00
|
|
|
inot->ccb_h.func_code = XPT_IMMEDIATE_NOTIFY;
|
1999-01-14 06:00:29 +00:00
|
|
|
inot->ccb_h.cbfcnp = targbhdone;
|
2013-09-01 11:50:37 +00:00
|
|
|
SLIST_INSERT_HEAD(&softc->immed_notify_slist, &inot->ccb_h,
|
|
|
|
|
periph_links.sle);
|
1999-01-14 06:00:29 +00:00
|
|
|
xpt_action((union ccb *)inot);
|
|
|
|
|
status = inot->ccb_h.status;
|
2013-09-01 11:50:37 +00:00
|
|
|
if (status != CAM_REQ_INPROG)
|
1999-01-14 06:00:29 +00:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (i == 0) {
|
2006-12-05 07:45:28 +00:00
|
|
|
xpt_print(periph->path,
|
|
|
|
|
"targbhenlun - Could not allocate immediate notify "
|
|
|
|
|
"CCBs: status = 0x%x\n", status);
|
1999-01-14 06:00:29 +00:00
|
|
|
targbhdislun(periph);
|
|
|
|
|
return (CAM_REQ_CMP_ERR);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return (CAM_REQ_CMP);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static cam_status
|
|
|
|
|
targbhdislun(struct cam_periph *periph)
|
|
|
|
|
{
|
|
|
|
|
union ccb ccb;
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
struct ccb_accept_tio* atio;
|
|
|
|
|
struct ccb_hdr *ccb_h;
|
|
|
|
|
|
|
|
|
|
softc = (struct targbh_softc *)periph->softc;
|
|
|
|
|
if ((softc->flags & TARGBH_FLAG_LUN_ENABLED) == 0)
|
|
|
|
|
return CAM_REQ_CMP;
|
|
|
|
|
|
|
|
|
|
/* XXX Block for Continue I/O completion */
|
|
|
|
|
|
|
|
|
|
/* Kill off all ACCECPT and IMMEDIATE CCBs */
|
|
|
|
|
while ((atio = softc->accept_tio_list) != NULL) {
|
|
|
|
|
|
|
|
|
|
softc->accept_tio_list =
|
|
|
|
|
((struct targbh_cmd_desc*)atio->ccb_h.ccb_descr)->atio_link;
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
ccb.cab.ccb_h.func_code = XPT_ABORT;
|
|
|
|
|
ccb.cab.abort_ccb = (union ccb *)atio;
|
|
|
|
|
xpt_action(&ccb);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while ((ccb_h = SLIST_FIRST(&softc->immed_notify_slist)) != NULL) {
|
|
|
|
|
SLIST_REMOVE_HEAD(&softc->immed_notify_slist, periph_links.sle);
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&ccb.cab.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
ccb.cab.ccb_h.func_code = XPT_ABORT;
|
|
|
|
|
ccb.cab.abort_ccb = (union ccb *)ccb_h;
|
|
|
|
|
xpt_action(&ccb);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Dissable this lun.
|
|
|
|
|
*/
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_setup_ccb(&ccb.cel.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
ccb.cel.ccb_h.func_code = XPT_EN_LUN;
|
|
|
|
|
ccb.cel.enable = 0;
|
|
|
|
|
xpt_action(&ccb);
|
|
|
|
|
|
|
|
|
|
if (ccb.cel.ccb_h.status != CAM_REQ_CMP)
|
|
|
|
|
printf("targbhdislun - Disabling lun on controller failed "
|
|
|
|
|
"with status 0x%x\n", ccb.cel.ccb_h.status);
|
|
|
|
|
else
|
|
|
|
|
softc->flags &= ~TARGBH_FLAG_LUN_ENABLED;
|
|
|
|
|
return (ccb.cel.ccb_h.status);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static cam_status
|
|
|
|
|
targbhctor(struct cam_periph *periph, void *arg)
|
|
|
|
|
{
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
|
|
|
|
|
/* Allocate our per-instance private storage */
|
|
|
|
|
softc = (struct targbh_softc *)malloc(sizeof(*softc),
|
2005-07-01 15:21:30 +00:00
|
|
|
M_SCSIBH, M_NOWAIT);
|
1999-01-14 06:00:29 +00:00
|
|
|
if (softc == NULL) {
|
|
|
|
|
printf("targctor: unable to malloc softc\n");
|
|
|
|
|
return (CAM_REQ_CMP_ERR);
|
|
|
|
|
}
|
|
|
|
|
|
2000-07-14 19:41:43 +00:00
|
|
|
bzero(softc, sizeof(*softc));
|
1999-01-14 06:00:29 +00:00
|
|
|
TAILQ_INIT(&softc->pending_queue);
|
|
|
|
|
TAILQ_INIT(&softc->work_queue);
|
|
|
|
|
softc->accept_tio_list = NULL;
|
|
|
|
|
SLIST_INIT(&softc->immed_notify_slist);
|
|
|
|
|
softc->state = TARGBH_STATE_NORMAL;
|
|
|
|
|
periph->softc = softc;
|
|
|
|
|
softc->init_level++;
|
|
|
|
|
|
2013-09-01 11:50:37 +00:00
|
|
|
if (targbhenlun(periph) != CAM_REQ_CMP)
|
|
|
|
|
cam_periph_invalidate(periph);
|
|
|
|
|
return (CAM_REQ_CMP);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhdtor(struct cam_periph *periph)
|
|
|
|
|
{
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
|
|
|
|
|
softc = (struct targbh_softc *)periph->softc;
|
|
|
|
|
|
|
|
|
|
softc->state = TARGBH_STATE_TEARDOWN;
|
|
|
|
|
|
|
|
|
|
targbhdislun(periph);
|
|
|
|
|
|
|
|
|
|
switch (softc->init_level) {
|
2003-05-31 20:44:32 +00:00
|
|
|
case 0:
|
2010-01-07 21:01:37 +00:00
|
|
|
panic("targdtor - impossible init level");
|
1999-01-14 06:00:29 +00:00
|
|
|
case 1:
|
2003-05-31 20:44:32 +00:00
|
|
|
/* FALLTHROUGH */
|
|
|
|
|
default:
|
2003-09-25 05:02:19 +00:00
|
|
|
/* XXX Wait for callback of targbhdislun() */
|
Merge CAM locking changes from the projects/camlock branch to radically
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.
Replace big per-SIM locks with bunch of smaller ones:
- per-LUN locks to protect device and peripheral drivers state;
- per-target locks to protect list of LUNs on target;
- per-bus locks to protect reference counting;
- per-send queue locks to protect queue of CCBs to be sent;
- per-done queue locks to protect queue of completed CCBs;
- remaining per-SIM locks now protect only HBA driver internals.
While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock. The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded. Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.
To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.
Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads. Load balanced
between them using "hash" of the device B:T:L address.
HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.
Sponsored by: iXsystems, Inc.
MFC after: 2 months
2013-10-21 12:00:26 +00:00
|
|
|
cam_periph_sleep(periph, softc, PRIBIO, "targbh", hz/2);
|
2005-07-01 15:21:30 +00:00
|
|
|
free(softc, M_SCSIBH);
|
1999-01-14 06:00:29 +00:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhstart(struct cam_periph *periph, union ccb *start_ccb)
|
|
|
|
|
{
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
struct ccb_hdr *ccbh;
|
|
|
|
|
struct ccb_accept_tio *atio;
|
|
|
|
|
struct targbh_cmd_desc *desc;
|
|
|
|
|
struct ccb_scsiio *csio;
|
|
|
|
|
ccb_flags flags;
|
|
|
|
|
|
|
|
|
|
softc = (struct targbh_softc *)periph->softc;
|
|
|
|
|
|
|
|
|
|
ccbh = TAILQ_FIRST(&softc->work_queue);
|
Merge CAM locking changes from the projects/camlock branch to radically
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.
Replace big per-SIM locks with bunch of smaller ones:
- per-LUN locks to protect device and peripheral drivers state;
- per-target locks to protect list of LUNs on target;
- per-bus locks to protect reference counting;
- per-send queue locks to protect queue of CCBs to be sent;
- per-done queue locks to protect queue of completed CCBs;
- remaining per-SIM locks now protect only HBA driver internals.
While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock. The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded. Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.
To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.
Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads. Load balanced
between them using "hash" of the device B:T:L address.
HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.
Sponsored by: iXsystems, Inc.
MFC after: 2 months
2013-10-21 12:00:26 +00:00
|
|
|
if (ccbh == NULL) {
|
1999-01-14 06:00:29 +00:00
|
|
|
xpt_release_ccb(start_ccb);
|
|
|
|
|
} else {
|
|
|
|
|
TAILQ_REMOVE(&softc->work_queue, ccbh, periph_links.tqe);
|
|
|
|
|
TAILQ_INSERT_HEAD(&softc->pending_queue, ccbh,
|
|
|
|
|
periph_links.tqe);
|
|
|
|
|
atio = (struct ccb_accept_tio*)ccbh;
|
|
|
|
|
desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
|
|
|
|
|
|
|
|
|
|
/* Is this a tagged request? */
|
2001-07-30 00:19:50 +00:00
|
|
|
flags = atio->ccb_h.flags &
|
|
|
|
|
(CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK);
|
1999-01-14 06:00:29 +00:00
|
|
|
|
2000-01-25 17:39:09 +00:00
|
|
|
csio = &start_ccb->csio;
|
1999-01-14 06:00:29 +00:00
|
|
|
/*
|
|
|
|
|
* If we are done with the transaction, tell the
|
|
|
|
|
* controller to send status and perform a CMD_CMPLT.
|
2000-01-25 17:39:09 +00:00
|
|
|
* If we have associated sense data, see if we can
|
|
|
|
|
* send that too.
|
1999-01-14 06:00:29 +00:00
|
|
|
*/
|
2000-01-25 17:39:09 +00:00
|
|
|
if (desc->data_resid == desc->data_increment) {
|
1999-01-14 06:00:29 +00:00
|
|
|
flags |= CAM_SEND_STATUS;
|
2000-01-25 17:39:09 +00:00
|
|
|
if (atio->sense_len) {
|
|
|
|
|
csio->sense_len = atio->sense_len;
|
|
|
|
|
csio->sense_data = atio->sense_data;
|
|
|
|
|
flags |= CAM_SEND_SENSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
cam_fill_ctio(csio,
|
|
|
|
|
/*retries*/2,
|
|
|
|
|
targbhdone,
|
|
|
|
|
flags,
|
2000-07-14 21:09:25 +00:00
|
|
|
(flags & CAM_TAG_ACTION_VALID)?
|
|
|
|
|
MSG_SIMPLE_Q_TAG : 0,
|
1999-01-14 06:00:29 +00:00
|
|
|
atio->tag_id,
|
|
|
|
|
atio->init_id,
|
|
|
|
|
desc->status,
|
|
|
|
|
/*data_ptr*/desc->data_increment == 0
|
|
|
|
|
? NULL : desc->data,
|
|
|
|
|
/*dxfer_len*/desc->data_increment,
|
|
|
|
|
/*timeout*/desc->timeout);
|
|
|
|
|
|
|
|
|
|
/* Override our wildcard attachment */
|
|
|
|
|
start_ccb->ccb_h.target_id = atio->ccb_h.target_id;
|
|
|
|
|
start_ccb->ccb_h.target_lun = atio->ccb_h.target_lun;
|
|
|
|
|
|
|
|
|
|
start_ccb->ccb_h.ccb_type = TARGBH_CCB_WORKQ;
|
|
|
|
|
start_ccb->ccb_h.ccb_atio = atio;
|
|
|
|
|
CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
|
|
|
|
|
("Sending a CTIO\n"));
|
|
|
|
|
xpt_action(start_ccb);
|
2001-07-30 00:19:50 +00:00
|
|
|
/*
|
|
|
|
|
* If the queue was frozen waiting for the response
|
|
|
|
|
* to this ATIO (for instance disconnection was disallowed),
|
|
|
|
|
* then release it now that our response has been queued.
|
|
|
|
|
*/
|
|
|
|
|
if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) {
|
|
|
|
|
cam_release_devq(periph->path,
|
|
|
|
|
/*relsim_flags*/0,
|
|
|
|
|
/*reduction*/0,
|
|
|
|
|
/*timeout*/0,
|
|
|
|
|
/*getcount_only*/0);
|
|
|
|
|
atio->ccb_h.status &= ~CAM_DEV_QFRZN;
|
|
|
|
|
}
|
1999-01-14 06:00:29 +00:00
|
|
|
ccbh = TAILQ_FIRST(&softc->work_queue);
|
|
|
|
|
}
|
|
|
|
|
if (ccbh != NULL)
|
2009-10-23 08:27:55 +00:00
|
|
|
xpt_schedule(periph, CAM_PRIORITY_NORMAL);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhdone(struct cam_periph *periph, union ccb *done_ccb)
|
|
|
|
|
{
|
|
|
|
|
struct targbh_softc *softc;
|
|
|
|
|
|
|
|
|
|
softc = (struct targbh_softc *)periph->softc;
|
|
|
|
|
|
|
|
|
|
switch (done_ccb->ccb_h.func_code) {
|
|
|
|
|
case XPT_ACCEPT_TARGET_IO:
|
|
|
|
|
{
|
|
|
|
|
struct ccb_accept_tio *atio;
|
|
|
|
|
struct targbh_cmd_desc *descr;
|
|
|
|
|
u_int8_t *cdb;
|
2001-07-30 00:19:50 +00:00
|
|
|
int priority;
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
atio = &done_ccb->atio;
|
|
|
|
|
descr = (struct targbh_cmd_desc*)atio->ccb_h.ccb_descr;
|
|
|
|
|
cdb = atio->cdb_io.cdb_bytes;
|
|
|
|
|
if (softc->state == TARGBH_STATE_TEARDOWN
|
|
|
|
|
|| atio->ccb_h.status == CAM_REQ_ABORTED) {
|
|
|
|
|
targbhfreedescr(descr);
|
2005-07-01 15:21:30 +00:00
|
|
|
xpt_free_ccb(done_ccb);
|
1999-01-14 06:00:29 +00:00
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Determine the type of incoming command and
|
|
|
|
|
* setup our buffer for a response.
|
|
|
|
|
*/
|
|
|
|
|
switch (cdb[0]) {
|
|
|
|
|
case INQUIRY:
|
|
|
|
|
{
|
|
|
|
|
struct scsi_inquiry *inq;
|
|
|
|
|
|
|
|
|
|
inq = (struct scsi_inquiry *)cdb;
|
|
|
|
|
CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
|
|
|
|
|
("Saw an inquiry!\n"));
|
|
|
|
|
/*
|
|
|
|
|
* Validate the command. We don't
|
|
|
|
|
* support any VPD pages, so complain
|
|
|
|
|
* if EVPD is set.
|
|
|
|
|
*/
|
|
|
|
|
if ((inq->byte2 & SI_EVPD) != 0
|
|
|
|
|
|| inq->page_code != 0) {
|
|
|
|
|
atio->ccb_h.flags &= ~CAM_DIR_MASK;
|
|
|
|
|
atio->ccb_h.flags |= CAM_DIR_NONE;
|
2000-01-25 17:39:09 +00:00
|
|
|
/*
|
|
|
|
|
* This needs to have other than a
|
|
|
|
|
* no_lun_sense_data response.
|
|
|
|
|
*/
|
Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.
Desriptor sense is a new sense data format that originated in SPC-3. Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.
This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.
This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.
camcontrol.c: Change uses of scsi_extract_sense() to use
scsi_extract_sense_len().
Use scsi_get_sks() instead of accessing sense key specific
data directly.
scsi_modes: Update the control mode page to the latest version (SPC-4).
scsi_cmds.c,
scsi_target.c: Change references to struct scsi_sense_data to struct
scsi_sense_data_fixed. This should be changed to allow the
user to specify fixed or descriptor sense, and then use
scsi_set_sense_data() to build the sense data.
ps3cdrom.c: Use scsi_set_sense_data() instead of setting sense data
manually.
cam_periph.c: Use scsi_extract_sense_len() instead of using
scsi_extract_sense() or accessing sense data directly.
cam_ccb.h: Bump the CAM_VERSION from 0x15 to 0x16. The change of
struct scsi_sense_data from 32 to 252 bytes changes the
size of struct ccb_scsiio, but not the size of union ccb.
So the version must be bumped to prevent structure
mis-matches.
scsi_all.h: Lots of updated SCSI sense data and other structures.
Add function prototypes for the new sense data functions.
Take out the inline implementation of scsi_extract_sense().
It is now too large to put in a header file.
Add macros to calculate whether fields are present and
filled in fixed and descriptor sense data
scsi_all.c: In scsi_op_desc(), allow the user to pass in NULL inquiry
data, and we'll assume a direct access device in that case.
Changed the SCSI RESERVED sense key name and description
to COMPLETED, as it is now defined in the spec.
Change the error recovery action for a number of read errors
to prevent lots of retries when the drive has said that the
block isn't accessible. This speeds up reconstruction of
the block by any RAID software running on top of the drive
(e.g. ZFS).
In scsi_sense_desc(), allow for invalid sense key numbers.
This allows calling this routine without checking the input
values first.
Change scsi_error_action() to use scsi_extract_sense_len(),
and handle things when invalid asc/ascq values are
encountered.
Add a new routine, scsi_desc_iterate(), that will call the
supplied function for every descriptor in descriptor format
sense data.
Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
which build descriptor and fixed format sense data. They
currently default to fixed format sense data.
Add a number of scsi_get_*() functions, which get different
types of sense data fields from either fixed or descriptor
format sense data, if the data is present.
Add a number of scsi_*_sbuf() functions, which print
formatted versions of various sense data fields. These
functions work for either fixed or descriptor sense.
Add a number of scsi_sense_*_sbuf() functions, which have a
standard calling interface and print the indicated field.
These functions take descriptors only.
Add scsi_sense_desc_sbuf(), which will print a formatted
version of the given sense descriptor.
Pull out a majority of the scsi_sense_sbuf() function and
put it into scsi_sense_only_sbuf(). This allows callers
that don't use struct ccb_scsiio to easily utilize the
printing routines. Revamp that function to handle
descriptor sense and use the new sense fetching and
printing routines.
Move scsi_extract_sense() into scsi_all.c, and implement it
in terms of the new function, scsi_extract_sense_len().
The _len() version takes a length (which should be the
sense length - residual) and can indicate which fields are
present and valid in the sense data.
Add a couple of new scsi_get_*() routines to get the sense
key, asc, and ascq only.
mly.c: Rename struct scsi_sense_data to struct
scsi_sense_data_fixed.
sbp_targ.c: Use the new sense fetching routines to get sense data
instead of accessing it directly.
sbp.c: Change the firewire/SCSI sense data transformation code to
use struct scsi_sense_data_fixed instead of struct
scsi_sense_data. This should be changed later to use
scsi_set_sense_data().
ciss.c: Calculate the sense residual properly. Use
scsi_get_sense_key() to fetch the sense key.
mps_sas.c,
mpt_cam.c: Set the sense residual properly.
iir.c: Use scsi_set_sense_data() instead of building sense data by
hand.
iscsi_subr.c: Use scsi_extract_sense_len() instead of grabbing sense data
directly.
umass.c: Use scsi_set_sense_data() to build sense data.
Grab the sense key using scsi_get_sense_key().
Calculate the sense residual properly.
isp_freebsd.h: Use scsi_get_*() routines to grab asc, ascq, and sense key
values.
Calculate and set the sense residual.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
|
|
|
bcopy(&no_lun_sense_data, &atio->sense_data,
|
|
|
|
|
min(sizeof(no_lun_sense_data),
|
|
|
|
|
sizeof(atio->sense_data)));
|
2000-07-14 19:41:43 +00:00
|
|
|
atio->sense_len = sizeof(no_lun_sense_data);
|
1999-01-14 06:00:29 +00:00
|
|
|
descr->data_resid = 0;
|
|
|
|
|
descr->data_increment = 0;
|
|
|
|
|
descr->status = SCSI_STATUS_CHECK_COND;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
* Direction is always relative
|
|
|
|
|
* to the initator.
|
|
|
|
|
*/
|
|
|
|
|
atio->ccb_h.flags &= ~CAM_DIR_MASK;
|
|
|
|
|
atio->ccb_h.flags |= CAM_DIR_IN;
|
|
|
|
|
descr->data = &no_lun_inq_data;
|
|
|
|
|
descr->data_resid = MIN(sizeof(no_lun_inq_data),
|
Add the CAM Target Layer (CTL).
CTL is a disk and processor device emulation subsystem originally written
for Copan Systems under Linux starting in 2003. It has been shipping in
Copan (now SGI) products since 2005.
It was ported to FreeBSD in 2008, and thanks to an agreement between SGI
(who acquired Copan's assets in 2010) and Spectra Logic in 2010, CTL is
available under a BSD-style license. The intent behind the agreement was
that Spectra would work to get CTL into the FreeBSD tree.
Some CTL features:
- Disk and processor device emulation.
- Tagged queueing
- SCSI task attribute support (ordered, head of queue, simple tags)
- SCSI implicit command ordering support. (e.g. if a read follows a mode
select, the read will be blocked until the mode select completes.)
- Full task management support (abort, LUN reset, target reset, etc.)
- Support for multiple ports
- Support for multiple simultaneous initiators
- Support for multiple simultaneous backing stores
- Persistent reservation support
- Mode sense/select support
- Error injection support
- High Availability support (1)
- All I/O handled in-kernel, no userland context switch overhead.
(1) HA Support is just an API stub, and needs much more to be fully
functional.
ctl.c: The core of CTL. Command handlers and processing,
character driver, and HA support are here.
ctl.h: Basic function declarations and data structures.
ctl_backend.c,
ctl_backend.h: The basic CTL backend API.
ctl_backend_block.c,
ctl_backend_block.h: The block and file backend. This allows for using
a disk or a file as the backing store for a LUN.
Multiple threads are started to do I/O to the
backing device, primarily because the VFS API
requires that to get any concurrency.
ctl_backend_ramdisk.c: A "fake" ramdisk backend. It only allocates a
small amount of memory to act as a source and sink
for reads and writes from an initiator. Therefore
it cannot be used for any real data, but it can be
used to test for throughput. It can also be used
to test initiators' support for extremely large LUNs.
ctl_cmd_table.c: This is a table with all 256 possible SCSI opcodes,
and command handler functions defined for supported
opcodes.
ctl_debug.h: Debugging support.
ctl_error.c,
ctl_error.h: CTL-specific wrappers around the CAM sense building
functions.
ctl_frontend.c,
ctl_frontend.h: These files define the basic CTL frontend port API.
ctl_frontend_cam_sim.c: This is a CTL frontend port that is also a CAM SIM.
This frontend allows for using CTL without any
target-capable hardware. So any LUNs you create in
CTL are visible in CAM via this port.
ctl_frontend_internal.c,
ctl_frontend_internal.h:
This is a frontend port written for Copan to do
some system-specific tasks that required sending
commands into CTL from inside the kernel. This
isn't entirely relevant to FreeBSD in general,
but can perhaps be repurposed.
ctl_ha.h: This is a stubbed-out High Availability API. Much
more is needed for full HA support. See the
comments in the header and the description of what
is needed in the README.ctl.txt file for more
details.
ctl_io.h: This defines most of the core CTL I/O structures.
union ctl_io is conceptually very similar to CAM's
union ccb.
ctl_ioctl.h: This defines all ioctls available through the CTL
character device, and the data structures needed
for those ioctls.
ctl_mem_pool.c,
ctl_mem_pool.h: Generic memory pool implementation used by the
internal frontend.
ctl_private.h: Private data structres (e.g. CTL softc) and
function prototypes. This also includes the SCSI
vendor and product names used by CTL.
ctl_scsi_all.c,
ctl_scsi_all.h: CTL wrappers around CAM sense printing functions.
ctl_ser_table.c: Command serialization table. This defines what
happens when one type of command is followed by
another type of command.
ctl_util.c,
ctl_util.h: CTL utility functions, primarily designed to be
used from userland. See ctladm for the primary
consumer of these functions. These include CDB
building functions.
scsi_ctl.c: CAM target peripheral driver and CTL frontend port.
This is the path into CTL for commands from
target-capable hardware/SIMs.
README.ctl.txt: CTL code features, roadmap, to-do list.
usr.sbin/Makefile: Add ctladm.
ctladm/Makefile,
ctladm/ctladm.8,
ctladm/ctladm.c,
ctladm/ctladm.h,
ctladm/util.c: ctladm(8) is the CTL management utility.
It fills a role similar to camcontrol(8).
It allow configuring LUNs, issuing commands,
injecting errors and various other control
functions.
usr.bin/Makefile: Add ctlstat.
ctlstat/Makefile
ctlstat/ctlstat.8,
ctlstat/ctlstat.c: ctlstat(8) fills a role similar to iostat(8).
It reports I/O statistics for CTL.
sys/conf/files: Add CTL files.
sys/conf/NOTES: Add device ctl.
sys/cam/scsi_all.h: To conform to more recent specs, the inquiry CDB
length field is now 2 bytes long.
Add several mode page definitions for CTL.
sys/cam/scsi_all.c: Handle the new 2 byte inquiry length.
sys/dev/ciss/ciss.c,
sys/dev/ata/atapi-cam.c,
sys/cam/scsi/scsi_targ_bh.c,
scsi_target/scsi_cmds.c,
mlxcontrol/interface.c: Update for 2 byte inquiry length field.
scsi_da.h: Add versions of the format and rigid disk pages
that are in a more reasonable format for CTL.
amd64/conf/GENERIC,
i386/conf/GENERIC,
ia64/conf/GENERIC,
sparc64/conf/GENERIC: Add device ctl.
i386/conf/PAE: The CTL frontend SIM at least does not compile
cleanly on PAE.
Sponsored by: Copan Systems, SGI and Spectra Logic
MFC after: 1 month
2012-01-12 00:34:33 +00:00
|
|
|
scsi_2btoul(inq->length));
|
1999-01-14 06:00:29 +00:00
|
|
|
descr->data_increment = descr->data_resid;
|
|
|
|
|
descr->timeout = 5 * 1000;
|
|
|
|
|
descr->status = SCSI_STATUS_OK;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
case REQUEST_SENSE:
|
|
|
|
|
{
|
|
|
|
|
struct scsi_request_sense *rsense;
|
|
|
|
|
|
|
|
|
|
rsense = (struct scsi_request_sense *)cdb;
|
|
|
|
|
/* Refer to static sense data */
|
|
|
|
|
atio->ccb_h.flags &= ~CAM_DIR_MASK;
|
|
|
|
|
atio->ccb_h.flags |= CAM_DIR_IN;
|
|
|
|
|
descr->data = &no_lun_sense_data;
|
|
|
|
|
descr->data_resid = request_sense_size;
|
|
|
|
|
descr->data_resid = MIN(descr->data_resid,
|
2000-07-14 19:41:43 +00:00
|
|
|
SCSI_CDB6_LEN(rsense->length));
|
1999-01-14 06:00:29 +00:00
|
|
|
descr->data_increment = descr->data_resid;
|
|
|
|
|
descr->timeout = 5 * 1000;
|
|
|
|
|
descr->status = SCSI_STATUS_OK;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
default:
|
|
|
|
|
/* Constant CA, tell initiator */
|
|
|
|
|
/* Direction is always relative to the initator */
|
|
|
|
|
atio->ccb_h.flags &= ~CAM_DIR_MASK;
|
|
|
|
|
atio->ccb_h.flags |= CAM_DIR_NONE;
|
Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.
Desriptor sense is a new sense data format that originated in SPC-3. Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.
This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.
This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.
camcontrol.c: Change uses of scsi_extract_sense() to use
scsi_extract_sense_len().
Use scsi_get_sks() instead of accessing sense key specific
data directly.
scsi_modes: Update the control mode page to the latest version (SPC-4).
scsi_cmds.c,
scsi_target.c: Change references to struct scsi_sense_data to struct
scsi_sense_data_fixed. This should be changed to allow the
user to specify fixed or descriptor sense, and then use
scsi_set_sense_data() to build the sense data.
ps3cdrom.c: Use scsi_set_sense_data() instead of setting sense data
manually.
cam_periph.c: Use scsi_extract_sense_len() instead of using
scsi_extract_sense() or accessing sense data directly.
cam_ccb.h: Bump the CAM_VERSION from 0x15 to 0x16. The change of
struct scsi_sense_data from 32 to 252 bytes changes the
size of struct ccb_scsiio, but not the size of union ccb.
So the version must be bumped to prevent structure
mis-matches.
scsi_all.h: Lots of updated SCSI sense data and other structures.
Add function prototypes for the new sense data functions.
Take out the inline implementation of scsi_extract_sense().
It is now too large to put in a header file.
Add macros to calculate whether fields are present and
filled in fixed and descriptor sense data
scsi_all.c: In scsi_op_desc(), allow the user to pass in NULL inquiry
data, and we'll assume a direct access device in that case.
Changed the SCSI RESERVED sense key name and description
to COMPLETED, as it is now defined in the spec.
Change the error recovery action for a number of read errors
to prevent lots of retries when the drive has said that the
block isn't accessible. This speeds up reconstruction of
the block by any RAID software running on top of the drive
(e.g. ZFS).
In scsi_sense_desc(), allow for invalid sense key numbers.
This allows calling this routine without checking the input
values first.
Change scsi_error_action() to use scsi_extract_sense_len(),
and handle things when invalid asc/ascq values are
encountered.
Add a new routine, scsi_desc_iterate(), that will call the
supplied function for every descriptor in descriptor format
sense data.
Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
which build descriptor and fixed format sense data. They
currently default to fixed format sense data.
Add a number of scsi_get_*() functions, which get different
types of sense data fields from either fixed or descriptor
format sense data, if the data is present.
Add a number of scsi_*_sbuf() functions, which print
formatted versions of various sense data fields. These
functions work for either fixed or descriptor sense.
Add a number of scsi_sense_*_sbuf() functions, which have a
standard calling interface and print the indicated field.
These functions take descriptors only.
Add scsi_sense_desc_sbuf(), which will print a formatted
version of the given sense descriptor.
Pull out a majority of the scsi_sense_sbuf() function and
put it into scsi_sense_only_sbuf(). This allows callers
that don't use struct ccb_scsiio to easily utilize the
printing routines. Revamp that function to handle
descriptor sense and use the new sense fetching and
printing routines.
Move scsi_extract_sense() into scsi_all.c, and implement it
in terms of the new function, scsi_extract_sense_len().
The _len() version takes a length (which should be the
sense length - residual) and can indicate which fields are
present and valid in the sense data.
Add a couple of new scsi_get_*() routines to get the sense
key, asc, and ascq only.
mly.c: Rename struct scsi_sense_data to struct
scsi_sense_data_fixed.
sbp_targ.c: Use the new sense fetching routines to get sense data
instead of accessing it directly.
sbp.c: Change the firewire/SCSI sense data transformation code to
use struct scsi_sense_data_fixed instead of struct
scsi_sense_data. This should be changed later to use
scsi_set_sense_data().
ciss.c: Calculate the sense residual properly. Use
scsi_get_sense_key() to fetch the sense key.
mps_sas.c,
mpt_cam.c: Set the sense residual properly.
iir.c: Use scsi_set_sense_data() instead of building sense data by
hand.
iscsi_subr.c: Use scsi_extract_sense_len() instead of grabbing sense data
directly.
umass.c: Use scsi_set_sense_data() to build sense data.
Grab the sense key using scsi_get_sense_key().
Calculate the sense residual properly.
isp_freebsd.h: Use scsi_get_*() routines to grab asc, ascq, and sense key
values.
Calculate and set the sense residual.
MFC after: 3 days
Sponsored by: Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
|
|
|
bcopy(&no_lun_sense_data, &atio->sense_data,
|
|
|
|
|
min(sizeof(no_lun_sense_data),
|
|
|
|
|
sizeof(atio->sense_data)));
|
2000-01-25 17:39:09 +00:00
|
|
|
atio->sense_len = sizeof (no_lun_sense_data);
|
1999-01-14 06:00:29 +00:00
|
|
|
descr->data_resid = 0;
|
|
|
|
|
descr->data_increment = 0;
|
|
|
|
|
descr->timeout = 5 * 1000;
|
|
|
|
|
descr->status = SCSI_STATUS_CHECK_COND;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Queue us up to receive a Continue Target I/O ccb. */
|
2001-07-30 00:19:50 +00:00
|
|
|
if ((atio->ccb_h.flags & CAM_DIS_DISCONNECT) != 0) {
|
|
|
|
|
TAILQ_INSERT_HEAD(&softc->work_queue, &atio->ccb_h,
|
|
|
|
|
periph_links.tqe);
|
|
|
|
|
priority = 0;
|
|
|
|
|
} else {
|
|
|
|
|
TAILQ_INSERT_TAIL(&softc->work_queue, &atio->ccb_h,
|
|
|
|
|
periph_links.tqe);
|
2009-10-23 08:27:55 +00:00
|
|
|
priority = CAM_PRIORITY_NORMAL;
|
2001-07-30 00:19:50 +00:00
|
|
|
}
|
|
|
|
|
xpt_schedule(periph, priority);
|
1999-01-14 06:00:29 +00:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
case XPT_CONT_TARGET_IO:
|
|
|
|
|
{
|
|
|
|
|
struct ccb_accept_tio *atio;
|
|
|
|
|
struct targbh_cmd_desc *desc;
|
|
|
|
|
|
|
|
|
|
CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
|
|
|
|
|
("Received completed CTIO\n"));
|
|
|
|
|
atio = (struct ccb_accept_tio*)done_ccb->ccb_h.ccb_atio;
|
|
|
|
|
desc = (struct targbh_cmd_desc *)atio->ccb_h.ccb_descr;
|
|
|
|
|
|
|
|
|
|
TAILQ_REMOVE(&softc->pending_queue, &atio->ccb_h,
|
|
|
|
|
periph_links.tqe);
|
|
|
|
|
|
2000-01-25 17:39:09 +00:00
|
|
|
/*
|
|
|
|
|
* We could check for CAM_SENT_SENSE bein set here,
|
|
|
|
|
* but since we're not maintaining any CA/UA state,
|
|
|
|
|
* there's no point.
|
|
|
|
|
*/
|
|
|
|
|
atio->sense_len = 0;
|
|
|
|
|
done_ccb->ccb_h.flags &= ~CAM_SEND_SENSE;
|
|
|
|
|
done_ccb->ccb_h.status &= ~CAM_SENT_SENSE;
|
|
|
|
|
|
2001-07-30 00:19:50 +00:00
|
|
|
/*
|
|
|
|
|
* Any errors will not change the data we return,
|
|
|
|
|
* so make sure the queue is not left frozen.
|
|
|
|
|
* XXX - At some point there may be errors that
|
|
|
|
|
* leave us in a connected state with the
|
|
|
|
|
* initiator...
|
|
|
|
|
*/
|
|
|
|
|
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
|
|
|
|
|
printf("Releasing Queue\n");
|
|
|
|
|
cam_release_devq(done_ccb->ccb_h.path,
|
|
|
|
|
/*relsim_flags*/0,
|
|
|
|
|
/*reduction*/0,
|
|
|
|
|
/*timeout*/0,
|
|
|
|
|
/*getcount_only*/0);
|
|
|
|
|
done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
|
|
|
|
|
}
|
1999-01-14 06:00:29 +00:00
|
|
|
desc->data_resid -= desc->data_increment;
|
|
|
|
|
xpt_release_ccb(done_ccb);
|
|
|
|
|
if (softc->state != TARGBH_STATE_TEARDOWN) {
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Send the original accept TIO back to the
|
|
|
|
|
* controller to handle more work.
|
|
|
|
|
*/
|
|
|
|
|
CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
|
|
|
|
|
("Returning ATIO to target\n"));
|
|
|
|
|
/* Restore wildcards */
|
|
|
|
|
atio->ccb_h.target_id = CAM_TARGET_WILDCARD;
|
|
|
|
|
atio->ccb_h.target_lun = CAM_LUN_WILDCARD;
|
|
|
|
|
xpt_action((union ccb *)atio);
|
|
|
|
|
break;
|
|
|
|
|
} else {
|
|
|
|
|
targbhfreedescr(desc);
|
2005-07-01 15:21:30 +00:00
|
|
|
free(atio, M_SCSIBH);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
2013-09-01 13:01:59 +00:00
|
|
|
case XPT_IMMEDIATE_NOTIFY:
|
1999-01-14 06:00:29 +00:00
|
|
|
{
|
2001-07-30 00:19:50 +00:00
|
|
|
int frozen;
|
|
|
|
|
|
|
|
|
|
frozen = (done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
|
1999-01-14 06:00:29 +00:00
|
|
|
if (softc->state == TARGBH_STATE_TEARDOWN
|
|
|
|
|
|| done_ccb->ccb_h.status == CAM_REQ_ABORTED) {
|
|
|
|
|
printf("Freed an immediate notify\n");
|
2005-07-01 15:21:30 +00:00
|
|
|
xpt_free_ccb(done_ccb);
|
2001-07-30 00:19:50 +00:00
|
|
|
} else {
|
|
|
|
|
/* Requeue for another immediate event */
|
|
|
|
|
xpt_action(done_ccb);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
2001-07-30 00:19:50 +00:00
|
|
|
if (frozen != 0)
|
|
|
|
|
cam_release_devq(periph->path,
|
|
|
|
|
/*relsim_flags*/0,
|
|
|
|
|
/*opening reduction*/0,
|
|
|
|
|
/*timeout*/0,
|
|
|
|
|
/*getcount_only*/0);
|
1999-01-14 06:00:29 +00:00
|
|
|
break;
|
|
|
|
|
}
|
1999-03-05 23:21:28 +00:00
|
|
|
default:
|
|
|
|
|
panic("targbhdone: Unexpected ccb opcode");
|
|
|
|
|
break;
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1999-03-05 23:21:28 +00:00
|
|
|
#ifdef NOTYET
|
1999-01-14 06:00:29 +00:00
|
|
|
static int
|
|
|
|
|
targbherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
|
|
|
|
|
{
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
1999-03-05 23:21:28 +00:00
|
|
|
#endif
|
1999-01-14 06:00:29 +00:00
|
|
|
|
|
|
|
|
static struct targbh_cmd_desc*
|
|
|
|
|
targbhallocdescr()
|
|
|
|
|
{
|
|
|
|
|
struct targbh_cmd_desc* descr;
|
|
|
|
|
|
|
|
|
|
/* Allocate the targbh_descr structure */
|
|
|
|
|
descr = (struct targbh_cmd_desc *)malloc(sizeof(*descr),
|
2005-07-01 15:21:30 +00:00
|
|
|
M_SCSIBH, M_NOWAIT);
|
1999-01-14 06:00:29 +00:00
|
|
|
if (descr == NULL)
|
|
|
|
|
return (NULL);
|
|
|
|
|
|
|
|
|
|
bzero(descr, sizeof(*descr));
|
|
|
|
|
|
|
|
|
|
/* Allocate buffer backing store */
|
2005-07-01 15:21:30 +00:00
|
|
|
descr->backing_store = malloc(MAX_BUF_SIZE, M_SCSIBH, M_NOWAIT);
|
1999-01-14 06:00:29 +00:00
|
|
|
if (descr->backing_store == NULL) {
|
2005-07-01 15:21:30 +00:00
|
|
|
free(descr, M_SCSIBH);
|
1999-01-14 06:00:29 +00:00
|
|
|
return (NULL);
|
|
|
|
|
}
|
|
|
|
|
descr->max_size = MAX_BUF_SIZE;
|
|
|
|
|
return (descr);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
targbhfreedescr(struct targbh_cmd_desc *descr)
|
|
|
|
|
{
|
2005-07-01 15:21:30 +00:00
|
|
|
free(descr->backing_store, M_SCSIBH);
|
|
|
|
|
free(descr, M_SCSIBH);
|
1999-01-14 06:00:29 +00:00
|
|
|
}
|
