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
123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
/* $NetBSD: ahavar.h,v 1.11 2001/04/25 17:53:30 bouyer Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
|
|
* Simulation Facility, NASA Ames Research Center.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/queue.h>
|
|
|
|
/*
|
|
* Mail box defs etc.
|
|
* these could be bigger but we need the aha_softc to fit on a single page..
|
|
*/
|
|
#define AHA_MBX_SIZE 16 /* mail box size (MAX 255 MBxs) */
|
|
/* don't need that many really */
|
|
#define AHA_CCB_MAX 16 /* store up to 16 CCBs at one time */
|
|
#define CCB_HASH_SIZE 16 /* hash table size for phystokv */
|
|
#define CCB_HASH_SHIFT 9
|
|
#define CCB_HASH(x) ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
|
|
|
|
#define aha_nextmbx(wmb, mbx, mbio) \
|
|
if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1]) \
|
|
(wmb) = &(mbx)->mbio[0]; \
|
|
else \
|
|
(wmb)++;
|
|
|
|
struct aha_mbx {
|
|
struct aha_mbx_out mbo[AHA_MBX_SIZE];
|
|
struct aha_mbx_in mbi[AHA_MBX_SIZE];
|
|
struct aha_mbx_out *cmbo; /* Collection Mail Box out */
|
|
struct aha_mbx_out *tmbo; /* Target Mail Box out */
|
|
struct aha_mbx_in *tmbi; /* Target Mail Box in */
|
|
};
|
|
|
|
struct aha_control {
|
|
struct aha_mbx ac_mbx; /* all our mailboxes */
|
|
struct aha_ccb ac_ccbs[AHA_CCB_MAX]; /* all our control blocks */
|
|
};
|
|
|
|
struct aha_softc {
|
|
struct device sc_dev;
|
|
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
bus_dma_tag_t sc_dmat;
|
|
bus_dmamap_t sc_dmamap_control; /* maps the control structures */
|
|
void *sc_ih;
|
|
|
|
struct aha_control *sc_control; /* control structures */
|
|
|
|
#define wmbx (&sc->sc_control->ac_mbx)
|
|
|
|
struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
|
|
TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
|
|
int sc_mbofull;
|
|
|
|
struct scsipi_adapter sc_adapter;
|
|
struct scsipi_channel sc_channel;
|
|
|
|
char sc_model[18],
|
|
sc_firmware[4];
|
|
};
|
|
|
|
/*
|
|
* Offset of a Mail Box In from the beginning of the control DMA mapping.
|
|
*/
|
|
#define AHA_MBI_OFF(m) (offsetof(struct aha_control, ac_mbx.mbi[0]) + \
|
|
(((u_long)(m)) - ((u_long)&wmbx->mbi[0])))
|
|
|
|
/*
|
|
* Offset of a Mail Box Out from the beginning of the control DMA mapping.
|
|
*/
|
|
#define AHA_MBO_OFF(m) (offsetof(struct aha_control, ac_mbx.mbo[0]) + \
|
|
(((u_long)(m)) - ((u_long)&wmbx->mbo[0])))
|
|
|
|
/*
|
|
* Offset of a CCB from the beginning of the control DMA mapping.
|
|
*/
|
|
#define AHA_CCB_OFF(c) (offsetof(struct aha_control, ac_ccbs[0]) + \
|
|
(((u_long)(c)) - ((u_long)&sc->sc_control->ac_ccbs[0])))
|
|
|
|
struct aha_probe_data {
|
|
int sc_irq, sc_drq;
|
|
int sc_scsi_dev; /* adapters scsi id */
|
|
};
|
|
|
|
int aha_find __P((bus_space_tag_t, bus_space_handle_t,
|
|
struct aha_probe_data *));
|
|
void aha_attach __P((struct aha_softc *, struct aha_probe_data *));
|
|
int aha_intr __P((void *));
|