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author | msmith <msmith@FreeBSD.org> | 2001-02-25 22:48:34 +0000 |
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committer | msmith <msmith@FreeBSD.org> | 2001-02-25 22:48:34 +0000 |
commit | e5b2c99d71956a1a73efdfbefb3ed19bd7d00d3b (patch) | |
tree | 92c016de15d655b019e93776c4543e7d28f396b8 /sys/dev/mly/mlyio.h | |
parent | 4e1aac88bdd20610856392647e751f1cd18eef78 (diff) | |
download | FreeBSD-src-e5b2c99d71956a1a73efdfbefb3ed19bd7d00d3b.zip FreeBSD-src-e5b2c99d71956a1a73efdfbefb3ed19bd7d00d3b.tar.gz |
Major update and bugfix for the 'mly' driver.
- Convert to a more efficient queueing implementation.
- Don't allocate command buffers on the fly; simply work from a
static pool.
- Add a control device interface, for later use.
- Handle controller overload better as a consequence of the
improved queue implementation.
- Add support for the XPT_GET_TRAN_SETTINGS ccb, and correctly
set the virtual SCSI channels up for multiple outstanding I/Os.
- Update copyrights for 2001.
- Some whitespace fixes to improve readability.
Due to a misunderstanding on my part, previous versions of the
driver were limited to a single outstanding I/O per virtual drive.
Needless to say, this update improves performance substantially.
Diffstat (limited to 'sys/dev/mly/mlyio.h')
-rw-r--r-- | sys/dev/mly/mlyio.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sys/dev/mly/mlyio.h b/sys/dev/mly/mlyio.h new file mode 100644 index 0000000..949b071 --- /dev/null +++ b/sys/dev/mly/mlyio.h @@ -0,0 +1,72 @@ +/*- + * Copyright (c) 2001 Michael Smith + * 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. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 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. + * + * $FreeBSD$ + */ + +/******************************************************************************** + * Control structures exchanged through the GAM interface with userland + * management tools. + * + * The member naming here is consistent with the Linux driver, with which this + * interface is basically compatible. + */ +struct mly_user_command +{ + unsigned char ControllerNumber; + union mly_command_packet CommandMailbox; + int DataTransferLength; + int RequestSenseLength; + void *DataTransferBuffer; + void *RequestSenseBuffer; + int CommandStatus; /* not in the Linux structure */ +}; + +#define MLYIO_COMMAND _IOWR('M', 200, struct mly_user_command) + +struct mly_user_health +{ + unsigned char ControllerNumber; + void *HealthStatusBuffer; +}; + +#define MLYIO_HEALTH _IOW('M', 201, struct mly_user_health) + +/* + * Command queue statistics + */ + +#define MLYQ_FREE 0 +#define MLYQ_CCB 1 +#define MLYQ_READY 2 +#define MLYQ_BUSY 3 +#define MLYQ_COMPLETE 4 +#define MLYQ_COUNT 5 + +struct mly_qstat +{ + u_int32_t q_length; + u_int32_t q_max; +}; |