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Synced with Linux 2.3.26; pretty printed.
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Ulrich Drepper
parent
d2907fd4e2
commit
528c8e28b7
@ -1,4 +1,4 @@
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -32,30 +32,142 @@
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are then read using the read call. The same header is used for
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replies; ignore the reply_len field. */
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#define SG_MAX_SENSE 16
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struct sg_header
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{
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int pack_len; /* length of incoming packet
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(including header). */
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int reply_len; /* max length of expected reply. */
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int pack_id; /* id number of packet. */
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int result; /* 0==ok, otherwise error number. */
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unsigned int twelve_byte:1; /* force 12 byte command length for
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group 6 & 7 commands. */
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unsigned int other_flags:31; /* for future use. */
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unsigned char sense_buffer[16]; /* used only by reads. */
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/* command follows then data for command. */
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/* Length of incoming packet (including header). */
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int pack_len;
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/* Maximal length of expected reply. */
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int reply_len;
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/* Id number of packet. */
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int pack_id;
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/* 0==ok, otherwise error number. */
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int result;
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/* Force 12 byte command length for group 6 & 7 commands. */
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unsigned int twelve_byte:1;
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/* SCSI status from target. */
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unsigned int target_status:5;
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/* Host status (see "DID" codes). */
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unsigned int host_status:8;
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/* Driver status+suggestion. */
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unsigned int driver_status:8;
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/* Unused. */
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unsigned int other_flags:10;
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/* Output in 3 cases:
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when target_status is CHECK_CONDITION or
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when target_status is COMMAND_TERMINATED or
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when (driver_status & DRIVER_SENSE) is true. */
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unsigned char sense_buffer[SG_MAX_SENSE];
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};
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/* ioctl's */
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#define SG_SET_TIMEOUT 0x2201 /* set timeout *(int *)arg==timeout */
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#define SG_GET_TIMEOUT 0x2202 /* get timeout return timeout */
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/* Request information about a specific SG device. */
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struct sg_scsi_id {
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/* Host number as in "scsi<n>" where 'n' is one of 0, 1, 2 etc. */
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int host_no;
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int channel;
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/* SCSI id of target device. */
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int scsi_id;
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int lun;
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/* TYPE_... defined in <scsi/scsi.h>. */
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int scsi_type;
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/* Host (adapter) maximum commands per lun. */
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short int h_cmd_per_lun;
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/* Device (or adapter) maximum queue length. */
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short int d_queue_depth;
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/* Unused, set to 0 for now. */
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int unused1;
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/* Unused, set to 0 for now. */
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int unused2;
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};
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#define SG_DEFAULT_TIMEOUT (60*HZ) /* 1 minute timeout */
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#define SG_DEFAULT_RETRIES 1
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/* Ioctl's */
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#define SG_SET_TIMEOUT 0x2201 /* Set timeout; *(int *)arg==timeout. */
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#define SG_GET_TIMEOUT 0x2202 /* Get timeout; return timeout. */
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#define SG_MAX_QUEUE 4 /* maximum outstanding request, arbitrary, may be
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changed if sufficient DMA buffer room available. */
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#define SG_EMULATED_HOST 0x2203 /* True for emulated host adapter (ATAPI). */
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#define SG_BIG_BUFF 32768
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/* Used to configure SCSI command transformation layer for ATAPI devices. */
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#define SG_SET_TRANSFORM 0x2204
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#define SG_GET_TRANSFORM 0x2205
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#define SG_SET_RESERVED_SIZE 0x2275 /* Request a new reserved buffer size. */
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#define SG_GET_RESERVED_SIZE 0x2272 /* Get actual size of reserved buffer */
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/* The following ioctl takes a 'sg_scsi_id *' object as its 3rd argument. */
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#define SG_GET_SCSI_ID 0x2276 /* Yields fd's bus, chan, dev, lun + type
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SCSI id information can also be obtained
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from SCSI_IOCTL_GET_IDLUN. */
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/* Override host setting and always DMA using low memory ( <16MB on i386). */
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#define SG_SET_FORCE_LOW_DMA 0x2279 /* 0-> use adapter setting, 1-> force */
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#define SG_GET_LOW_DMA 0x227a /* 0-> use all ram for dma; 1-> low dma ram */
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/* If SG_SET_FORCE_PACK_ID is set to 1, pack_id is input to read() which
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will attempt to read that pack_id or block (or return EAGAIN). If
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pack_id is -1 then read oldest waiting. If SG_SET_FORCE_PACK_ID is
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set to 0 then pack_id gets ignored by read() and the oldest
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readable is fetched. */
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#define SG_SET_FORCE_PACK_ID 0x227b
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#define SG_GET_PACK_ID 0x227c /* Yields oldest readable pack_id (or -1). */
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#define SG_GET_NUM_WAITING 0x227d /* Number of commands awaiting read(). */
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/* Turn on error sense trace (1..8), dump this device to log/console (9)
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or dump all sg device states ( >9 ) to log/console. */
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#define SG_SET_DEBUG 0x227e /* 0 -> turn off debug */
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/* Yields max scatter gather tablesize allowed by current host adapter. */
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#define SG_GET_SG_TABLESIZE 0x227F /* 0 implies can't do scatter gather */
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/* Control whether sequencing per file descriptor or per device. */
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#define SG_GET_MERGE_FD 0x2274 /* 0-> per fd, 1-> per device */
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#define SG_SET_MERGE_FD 0x2273 /* Attempt to change sequencing state,
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if more than current fd open on device,
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will fail with EBUSY. */
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/* Get/set command queuing state per fd (default is SG_DEF_COMMAND_Q). */
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#define SG_GET_COMMAND_Q 0x2270 /* Yields 0 (queuing off) or 1 (on). */
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#define SG_SET_COMMAND_Q 0x2271 /* Change queuing state with 0 or 1. */
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/* Get/set whether DMA underrun will cause an error (DID_ERROR). Currently this
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only applies to the [much-used] aic7xxx driver. */
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#define SG_GET_UNDERRUN_FLAG 0x2280 /* Yields 0 (don't flag) or 1 (flag). */
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#define SG_SET_UNDERRUN_FLAG 0x2281 /* Change flag underrun state. */
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#define SG_GET_VERSION_NUM 0x2282 /* Example: version 2.1.34 yields 20134 */
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#define SG_NEXT_CMD_LEN 0x2283 /* Override SCSI command length with given
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number on the next write() on this file
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descriptor. */
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/* Returns -EBUSY if occupied else takes as input: 0 -> do nothing,
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1 -> device reset or 2 -> bus reset (may not be activated yet). */
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#define SG_SCSI_RESET 0x2284
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/* Largest size (in bytes) a single scatter-gather list element can have.
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The value must be a power of 2 and <= (PAGE_SIZE * 32) [131072 bytes on
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i386]. The minimum value is PAGE_SIZE. If scatter-gather not supported
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by adapter then this value is the largest data block that can be
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read/written by a single scsi command. The user can find the value of
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PAGE_SIZE by calling getpagesize() defined in <unistd.h>. */
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#define SG_SCATTER_SZ (8 * 4096) /* PAGE_SIZE is not available to user. */
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#define SG_DEFAULT_TIMEOUT (60 * HZ) /* 1 minute timeout */
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#define SG_DEFAULT_RETRIES 1
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/* Defaults, commented if they differ from original sg driver */
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#define SG_DEF_COMMAND_Q 0
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#define SG_DEF_MERGE_FD 0 /* was 1 -> per device sequencing */
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#define SG_DEF_FORCE_LOW_DMA 0 /* was 1 -> memory below 16MB on i386 */
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#define SG_DEF_FORCE_PACK_ID 0
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#define SG_DEF_UNDERRUN_FLAG 0
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#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ
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#define SG_MAX_QUEUE 16 /* Maximum outstanding request, arbitrary,
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may be changed if sufficient DMA buffer
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room available. */
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#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE /* for backward compatibility */
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#endif /* scsi/sg.h */
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