937a7a3ed9
This is a completely rewritten scsipi_xfer execution engine, and the associated changes to HBA drivers. Overview of changes & features: - All xfers are queued in the mid-layer, rather than doing so in an ad-hoc fashion in individual adapter drivers. - Adapter/channel resource management in the mid-layer, avoids even trying to start running an xfer if the adapter/channel doesn't have the resources. - Better communication between the mid-layer and the adapters. - Asynchronous event notification mechanism from adapter to mid-layer and peripherals. - Better peripheral queue management: freeze/thaw, sorted requeueing during recovery, etc. - Clean separation of peripherals, adapters, and adapter channels (no more scsipi_link). - Kernel thread for each scsipi_channel makes error recovery much easier (no more dealing with interrupt context when recovering from an error). - Mid-layer support for tagged queueing: commands can have the tag type set explicitly, tag IDs are allocated in the mid-layer (thus eliminating the need to use buggy tag ID allocation schemes in many adapter drivers). - support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command will be requeued, or a REQUEST SENSE will be sent as appropriate. Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* $NetBSD: scsi_message.h,v 1.5 2001/04/25 17:53:39 bouyer Exp $ */
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/* Messages (1 byte) */ /* I/T (M)andatory or (O)ptional */
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#define MSG_CMDCOMPLETE 0x00 /* M/M */
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#define MSG_EXTENDED 0x01 /* O/O */
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#define MSG_SAVEDATAPOINTER 0x02 /* O/O */
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#define MSG_RESTOREPOINTERS 0x03 /* O/O */
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#define MSG_DISCONNECT 0x04 /* O/O */
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#define MSG_INITIATOR_DET_ERR 0x05 /* M/M */
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#define MSG_ABORT 0x06 /* O/M */
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#define MSG_MESSAGE_REJECT 0x07 /* M/M */
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#define MSG_NOOP 0x08 /* M/M */
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#define MSG_PARITY_ERROR 0x09 /* M/M */
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#define MSG_LINK_CMD_COMPLETE 0x0a /* O/O */
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#define MSG_LINK_CMD_COMPLETEF 0x0b /* O/O */
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#define MSG_BUS_DEV_RESET 0x0c /* O/M */
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#define MSG_ABORT_TAG 0x0d /* O/O */
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#define MSG_CLEAR_QUEUE 0x0e /* O/O */
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#define MSG_INIT_RECOVERY 0x0f /* O/O */
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#define MSG_REL_RECOVERY 0x10 /* O/O */
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#define MSG_TERM_IO_PROC 0x11 /* O/O */
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/* Messages (2 byte) */
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#define MSG_SIMPLE_Q_TAG 0x20 /* O/O */
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#define MSG_HEAD_OF_Q_TAG 0x21 /* O/O */
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#define MSG_ORDERED_Q_TAG 0x22 /* O/O */
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#define MSG_IGN_WIDE_RESIDUE 0x23 /* O/O */
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/* Identify message */ /* M/M */
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#define MSG_IDENTIFYFLAG 0x80
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#define MSG_IDENTIFY_DISCFLAG 0x40
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#define MSG_IDENTIFY(lun, disc) (((disc) ? 0xc0 : MSG_IDENTIFYFLAG) | (lun))
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#define MSG_ISIDENTIFY(m) ((m) & MSG_IDENTIFYFLAG)
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/* Extended messages (opcode and length) */
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#define MSG_EXT_SDTR 0x01
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#define MSG_EXT_SDTR_LEN 0x03
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#define MSG_EXT_WDTR 0x03
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#define MSG_EXT_WDTR_LEN 0x02
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#define MSG_EXT_WDTR_BUS_8_BIT 0x00
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#define MSG_EXT_WDTR_BUS_16_BIT 0x01
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#define MSG_EXT_WDTR_BUS_32_BIT 0x02
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