763 lines
18 KiB
C
763 lines
18 KiB
C
/* $NetBSD: swdmover.c,v 1.7 2003/11/07 22:04:13 briggs Exp $ */
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/*
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* Copyright (c) 2002, 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* swdmover.c: Software back-end providing the dmover functions
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* mentioned in dmover(9).
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*
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* This module provides a fallback for cases where no hardware
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* data movers are present in a system, and also serves an an
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* example of how to write a dmover back-end.
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*
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* Note that even through the software dmover doesn't require
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* interrupts to be blocked, we block them anyway to demonstrate
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* the locking protocol.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: swdmover.c,v 1.7 2003/11/07 22:04:13 briggs Exp $");
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/kthread.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <dev/dmover/dmovervar.h>
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struct swdmover_function {
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void (*sdf_process)(struct dmover_request *);
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};
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static struct dmover_backend swdmover_backend;
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static struct proc *swdmover_proc;
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static int swdmover_cv;
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void swdmoverattach(int);
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/*
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* swdmover_process:
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*
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* Dmover back-end entry point.
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*/
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static void
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swdmover_process(struct dmover_backend *dmb)
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{
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int s;
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/*
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* Just wake up the processing thread. This will allow
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* requests to linger on the middle-end's queue so that
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* they can be cancelled, if need-be.
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*/
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s = splbio();
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/* XXXLOCK */
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if (TAILQ_EMPTY(&dmb->dmb_pendreqs) == 0)
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wakeup(&swdmover_cv);
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/* XXXUNLOCK */
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splx(s);
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}
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/*
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* swdmover_thread:
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*
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* Request processing thread.
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*/
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static void
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swdmover_thread(void *arg)
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{
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struct dmover_backend *dmb = arg;
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struct dmover_request *dreq;
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struct swdmover_function *sdf;
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int s;
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s = splbio();
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/* XXXLOCK */
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for (;;) {
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dreq = TAILQ_FIRST(&dmb->dmb_pendreqs);
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if (dreq == NULL) {
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/* XXXUNLOCK */
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(void) tsleep(&swdmover_cv, PRIBIO, "swdmvr", 0);
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continue;
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}
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dmover_backend_remque(dmb, dreq);
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dreq->dreq_flags |= DMOVER_REQ_RUNNING;
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/* XXXUNLOCK */
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splx(s);
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sdf = dreq->dreq_assignment->das_algdesc->dad_data;
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(*sdf->sdf_process)(dreq);
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s = splbio();
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/* XXXLOCK */
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}
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}
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/*
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* swdmover_func_zero_process:
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*
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* Processing routine for the "zero" function.
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*/
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static void
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swdmover_func_zero_process(struct dmover_request *dreq)
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{
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switch (dreq->dreq_outbuf_type) {
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case DMOVER_BUF_LINEAR:
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memset(dreq->dreq_outbuf.dmbuf_linear.l_addr, 0,
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dreq->dreq_outbuf.dmbuf_linear.l_len);
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break;
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case DMOVER_BUF_UIO:
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{
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struct uio *uio = dreq->dreq_outbuf.dmbuf_uio;
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char *cp;
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size_t count, buflen;
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int error;
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if (uio->uio_rw != UIO_READ) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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buflen = uio->uio_resid;
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if (buflen > 1024)
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buflen = 1024;
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cp = alloca(buflen);
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memset(cp, 0, buflen);
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while ((count = uio->uio_resid) != 0) {
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if (count > buflen)
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count = buflen;
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error = uiomove(cp, count, uio);
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if (error) {
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/* XXXLOCK */
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dreq->dreq_error = error;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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}
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break;
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}
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default:
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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}
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dmover_done(dreq);
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}
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/*
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* swdmover_func_fill8_process:
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*
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* Processing routine for the "fill8" function.
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*/
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static void
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swdmover_func_fill8_process(struct dmover_request *dreq)
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{
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switch (dreq->dreq_outbuf_type) {
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case DMOVER_BUF_LINEAR:
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memset(dreq->dreq_outbuf.dmbuf_linear.l_addr,
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dreq->dreq_immediate[0],
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dreq->dreq_outbuf.dmbuf_linear.l_len);
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break;
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case DMOVER_BUF_UIO:
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{
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struct uio *uio = dreq->dreq_outbuf.dmbuf_uio;
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char *cp;
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size_t count, buflen;
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int error;
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if (uio->uio_rw != UIO_READ) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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buflen = uio->uio_resid;
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if (buflen > 1024)
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buflen = 1024;
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cp = alloca(buflen);
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memset(cp, dreq->dreq_immediate[0], buflen);
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while ((count = uio->uio_resid) != 0) {
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if (count > buflen)
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count = buflen;
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error = uiomove(cp, count, uio);
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if (error) {
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/* XXXLOCK */
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dreq->dreq_error = error;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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}
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break;
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}
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default:
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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}
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dmover_done(dreq);
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}
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static void
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xor2(uint8_t *dst, uint8_t *src1, uint8_t *src2, int cnt)
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{
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while (cnt--)
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*dst++ = *src1++ ^ *src2++;
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}
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/*
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* swdmover_func_xor_process:
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*
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* Processing routine for the "xor" function.
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*/
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static void
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swdmover_func_xor_process(struct dmover_request *dreq)
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{
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#define INBUF_L(x) dreq->dreq_inbuf[(x)].dmbuf_linear
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#define OUTBUF_L dreq->dreq_outbuf.dmbuf_linear
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uint32_t *dst32, *src32;
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uint8_t *dst8, *src8;
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int i, ninputs = dreq->dreq_assignment->das_algdesc->dad_ninputs;
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int aligned, len, nwords;
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/* XXX Currently, both buffers must be of same type. */
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if (dreq->dreq_inbuf_type != dreq->dreq_outbuf_type) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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goto done;
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}
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switch (dreq->dreq_outbuf_type) {
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case DMOVER_BUF_LINEAR:
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aligned = 1;
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if ((ulong) OUTBUF_L.l_addr & 0x3)
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aligned = 0;
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len = OUTBUF_L.l_len;
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for (i = 0 ; i < ninputs ; i++) {
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if (len != INBUF_L(i).l_len) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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if ((ulong) INBUF_L(i).l_addr & 0x3)
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aligned = 0;
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}
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if (aligned) {
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dst32 = (uint32_t *) OUTBUF_L.l_addr;
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nwords = len / 4;
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while (nwords--) {
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*dst32 = 0;
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for (i = 0 ; i < ninputs ; i++) {
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src32 = (uint32_t *) INBUF_L(i).l_addr;
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*dst32 ^= *src32;
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}
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dst32++;
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len -= 4;
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}
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}
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if (len) {
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dst8 = (uint8_t *) OUTBUF_L.l_addr;
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while (len--) {
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*dst8 = 0;
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for (i = 0 ; i < ninputs ; i++) {
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src8 = (uint8_t *) INBUF_L(i).l_addr;
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*dst8 ^= *src8;
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}
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dst8++;
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}
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}
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break;
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case DMOVER_BUF_UIO:
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{
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struct uio *uio_out = dreq->dreq_outbuf.dmbuf_uio;
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struct uio *uio_in = dreq->dreq_inbuf[0].dmbuf_uio;
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struct uio *uio;
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char *cp, *dst;
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size_t count, buflen;
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int error;
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if (uio_in->uio_rw != UIO_WRITE ||
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uio_out->uio_rw != UIO_READ ||
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uio_in->uio_resid != uio_out->uio_resid) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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buflen = uio_in->uio_resid;
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if (buflen > 1024)
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buflen = 1024;
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cp = alloca(buflen);
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dst = alloca(buflen);
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/*
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* For each block, copy first input buffer into the destination
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* buffer and then read the rest, one by one, into a temporary
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* buffer and xor into the destination buffer. After all of
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* the inputs have been xor'd in, move the destination buffer
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* out and loop.
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*/
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while ((count = uio_in->uio_resid) != 0) {
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if (count > buflen)
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count = buflen;
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error = uiomove(dst, count, uio_in);
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if (error) {
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/* XXXLOCK */
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dreq->dreq_error = error;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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for (i=1 ; (i < ninputs) && (error == 0) ; i++) {
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uio = dreq->dreq_inbuf[i].dmbuf_uio;
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error = uiomove(cp, count, uio);
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if (error == 0) {
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xor2(dst, dst, cp, count);
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}
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}
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if (error == 0) {
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error = uiomove(dst, count, uio_out);
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} else {
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/* XXXLOCK */
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dreq->dreq_error = error;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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}
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break;
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}
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default:
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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}
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done:
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dmover_done(dreq);
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}
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/*
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* swdmover_func_copy_process:
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*
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* Processing routine for the "copy" function.
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*/
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static void
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swdmover_func_copy_process(struct dmover_request *dreq)
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{
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/* XXX Currently, both buffers must be of same type. */
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if (dreq->dreq_inbuf_type != dreq->dreq_outbuf_type) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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goto done;
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}
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switch (dreq->dreq_outbuf_type) {
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case DMOVER_BUF_LINEAR:
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if (dreq->dreq_outbuf.dmbuf_linear.l_len !=
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dreq->dreq_inbuf[0].dmbuf_linear.l_len) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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memcpy(dreq->dreq_outbuf.dmbuf_linear.l_addr,
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dreq->dreq_inbuf[0].dmbuf_linear.l_addr,
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dreq->dreq_outbuf.dmbuf_linear.l_len);
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break;
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case DMOVER_BUF_UIO:
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{
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struct uio *uio_out = dreq->dreq_outbuf.dmbuf_uio;
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struct uio *uio_in = dreq->dreq_inbuf[0].dmbuf_uio;
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char *cp;
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size_t count, buflen;
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int error;
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if (uio_in->uio_rw != UIO_WRITE ||
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uio_out->uio_rw != UIO_READ ||
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uio_in->uio_resid != uio_out->uio_resid) {
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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buflen = uio_in->uio_resid;
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if (buflen > 1024)
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buflen = 1024;
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cp = alloca(buflen);
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while ((count = uio_in->uio_resid) != 0) {
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if (count > buflen)
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count = buflen;
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error = uiomove(cp, count, uio_in);
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if (error == 0)
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error = uiomove(cp, count, uio_out);
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if (error) {
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/* XXXLOCK */
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dreq->dreq_error = error;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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break;
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}
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}
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break;
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}
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default:
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/* XXXLOCK */
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dreq->dreq_error = EINVAL;
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dreq->dreq_flags |= DMOVER_REQ_ERROR;
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/* XXXUNLOCK */
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}
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done:
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dmover_done(dreq);
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}
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static const uint32_t iscsi_crc32c_table[256] = {
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0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4,
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0xc79a971f, 0x35f1141c, 0x26a1e7e8, 0xd4ca64eb,
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0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b,
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0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24,
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0x105ec76f, 0xe235446c, 0xf165b798, 0x030e349b,
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0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384,
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0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54,
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0x5d1d08bf, 0xaf768bbc, 0xbc267848, 0x4e4dfb4b,
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0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a,
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0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35,
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0xaa64d611, 0x580f5512, 0x4b5fa6e6, 0xb93425e5,
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0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa,
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0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45,
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0xf779deae, 0x05125dad, 0x1642ae59, 0xe4292d5a,
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0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a,
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0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595,
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0x417b1dbc, 0xb3109ebf, 0xa0406d4b, 0x522bee48,
|
|
0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957,
|
|
0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687,
|
|
0x0c38d26c, 0xfe53516f, 0xed03a29b, 0x1f682198,
|
|
0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927,
|
|
0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38,
|
|
0xdbfc821c, 0x2997011f, 0x3ac7f2eb, 0xc8ac71e8,
|
|
0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7,
|
|
0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096,
|
|
0xa65c047d, 0x5437877e, 0x4767748a, 0xb50cf789,
|
|
0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859,
|
|
0x2c855cb2, 0xdeeedfb1, 0xcdbe2c45, 0x3fd5af46,
|
|
0x7198540d, 0x83f3d70e, 0x90a324fa, 0x62c8a7f9,
|
|
0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6,
|
|
0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36,
|
|
0x3cdb9bdd, 0xceb018de, 0xdde0eb2a, 0x2f8b6829,
|
|
0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c,
|
|
0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93,
|
|
0x082f63b7, 0xfa44e0b4, 0xe9141340, 0x1b7f9043,
|
|
0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c,
|
|
0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3,
|
|
0x55326b08, 0xa759e80b, 0xb4091bff, 0x466298fc,
|
|
0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c,
|
|
0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033,
|
|
0xa24bb5a6, 0x502036a5, 0x4370c551, 0xb11b4652,
|
|
0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d,
|
|
0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d,
|
|
0xef087a76, 0x1d63f975, 0x0e330a81, 0xfc588982,
|
|
0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d,
|
|
0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622,
|
|
0x38cc2a06, 0xcaa7a905, 0xd9f75af1, 0x2b9cd9f2,
|
|
0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed,
|
|
0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530,
|
|
0x0417b1db, 0xf67c32d8, 0xe52cc12c, 0x1747422f,
|
|
0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff,
|
|
0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0,
|
|
0xd3d3e1ab, 0x21b862a8, 0x32e8915c, 0xc083125f,
|
|
0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540,
|
|
0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90,
|
|
0x9e902e7b, 0x6cfbad78, 0x7fab5e8c, 0x8dc0dd8f,
|
|
0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee,
|
|
0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1,
|
|
0x69e9f0d5, 0x9b8273d6, 0x88d28022, 0x7ab90321,
|
|
0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e,
|
|
0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81,
|
|
0x34f4f86a, 0xc69f7b69, 0xd5cf889d, 0x27a40b9e,
|
|
0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e,
|
|
0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351,
|
|
};
|
|
|
|
static uint32_t
|
|
iscsi_crc32c(const uint8_t *buf, size_t len, uint32_t last)
|
|
{
|
|
uint32_t crc = 0xffffffffU ^ last;
|
|
|
|
while (len--)
|
|
crc = iscsi_crc32c_table[(crc ^ *buf++) & 0xff] ^ (crc >> 8);
|
|
|
|
return (crc ^ 0xffffffffU);
|
|
}
|
|
|
|
/*
|
|
* swdmover_func_iscsi_crc32c_process:
|
|
*
|
|
* Processing routine for the "iscsi-crc32c" function.
|
|
*/
|
|
static void
|
|
swdmover_func_iscsi_crc32c_process(struct dmover_request *dreq)
|
|
{
|
|
uint32_t result;
|
|
|
|
/* No output buffer; we use the immediate only. */
|
|
if (dreq->dreq_outbuf_type != DMOVER_BUF_NONE) {
|
|
/* XXXLOCK */
|
|
dreq->dreq_error = EINVAL;
|
|
dreq->dreq_flags |= DMOVER_REQ_ERROR;
|
|
/* XXXUNLOCK */
|
|
goto done;
|
|
}
|
|
|
|
memcpy(&result, dreq->dreq_immediate, sizeof(result));
|
|
|
|
switch (dreq->dreq_inbuf_type) {
|
|
case DMOVER_BUF_LINEAR:
|
|
result = iscsi_crc32c(dreq->dreq_inbuf[0].dmbuf_linear.l_addr,
|
|
dreq->dreq_inbuf[0].dmbuf_linear.l_len, result);
|
|
break;
|
|
|
|
case DMOVER_BUF_UIO:
|
|
{
|
|
struct uio *uio_in = dreq->dreq_inbuf[0].dmbuf_uio;
|
|
uint8_t *cp;
|
|
size_t count, buflen;
|
|
int error;
|
|
|
|
if (uio_in->uio_rw != UIO_WRITE) {
|
|
/* XXXLOCK */
|
|
dreq->dreq_error = EINVAL;
|
|
dreq->dreq_flags |= DMOVER_REQ_ERROR;
|
|
/* XXXUNLOCK */
|
|
goto done;
|
|
}
|
|
|
|
buflen = uio_in->uio_resid;
|
|
if (buflen > 1024)
|
|
buflen = 1024;
|
|
cp = alloca(buflen);
|
|
|
|
while ((count = uio_in->uio_resid) != 0) {
|
|
if (count > buflen)
|
|
count = buflen;
|
|
error = uiomove(cp, count, uio_in);
|
|
if (error) {
|
|
/* XXXLOCK */
|
|
dreq->dreq_error = error;
|
|
dreq->dreq_flags |= DMOVER_REQ_ERROR;
|
|
/* XXXUNLOCK */
|
|
goto done;
|
|
} else
|
|
result = iscsi_crc32c(cp, count, result);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
/* XXXLOCK */
|
|
dreq->dreq_error = EINVAL;
|
|
dreq->dreq_flags |= DMOVER_REQ_ERROR;
|
|
/* XXXUNLOCK */
|
|
goto done;
|
|
}
|
|
|
|
memcpy(dreq->dreq_immediate, &result, sizeof(result));
|
|
done:
|
|
dmover_done(dreq);
|
|
}
|
|
|
|
static struct swdmover_function swdmover_func_zero = {
|
|
swdmover_func_zero_process
|
|
};
|
|
|
|
static struct swdmover_function swdmover_func_fill8 = {
|
|
swdmover_func_fill8_process
|
|
};
|
|
|
|
static struct swdmover_function swdmover_func_copy = {
|
|
swdmover_func_copy_process
|
|
};
|
|
|
|
static struct swdmover_function swdmover_func_xor = {
|
|
swdmover_func_xor_process
|
|
};
|
|
|
|
static struct swdmover_function swdmover_func_iscsi_crc32c = {
|
|
swdmover_func_iscsi_crc32c_process
|
|
};
|
|
|
|
const struct dmover_algdesc swdmover_algdescs[] = {
|
|
{
|
|
DMOVER_FUNC_XOR2,
|
|
&swdmover_func_xor,
|
|
2
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR3,
|
|
&swdmover_func_xor,
|
|
3
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR4,
|
|
&swdmover_func_xor,
|
|
4
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR5,
|
|
&swdmover_func_xor,
|
|
5
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR6,
|
|
&swdmover_func_xor,
|
|
6
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR7,
|
|
&swdmover_func_xor,
|
|
7
|
|
},
|
|
{
|
|
DMOVER_FUNC_XOR8,
|
|
&swdmover_func_xor,
|
|
8
|
|
},
|
|
{
|
|
DMOVER_FUNC_ZERO,
|
|
&swdmover_func_zero,
|
|
0
|
|
},
|
|
{
|
|
DMOVER_FUNC_FILL8,
|
|
&swdmover_func_fill8,
|
|
0
|
|
},
|
|
{
|
|
DMOVER_FUNC_COPY,
|
|
&swdmover_func_copy,
|
|
1
|
|
},
|
|
{
|
|
DMOVER_FUNC_ISCSI_CRC32C,
|
|
&swdmover_func_iscsi_crc32c,
|
|
1,
|
|
},
|
|
};
|
|
#define SWDMOVER_ALGDESC_COUNT \
|
|
(sizeof(swdmover_algdescs) / sizeof(swdmover_algdescs[0]))
|
|
|
|
/*
|
|
* swdmover_create_thread:
|
|
*
|
|
* Actually create the swdmover processing thread.
|
|
*/
|
|
static void
|
|
swdmover_create_thread(void *arg)
|
|
{
|
|
int error;
|
|
|
|
error = kthread_create1(swdmover_thread, arg, &swdmover_proc,
|
|
"swdmover");
|
|
if (error)
|
|
printf("WARNING: unable to create swdmover thread, "
|
|
"error = %d\n", error);
|
|
}
|
|
|
|
/*
|
|
* swdmoverattach:
|
|
*
|
|
* Pesudo-device attach routine.
|
|
*/
|
|
void
|
|
swdmoverattach(int count)
|
|
{
|
|
|
|
swdmover_backend.dmb_name = "swdmover";
|
|
swdmover_backend.dmb_speed = 1; /* XXX */
|
|
swdmover_backend.dmb_cookie = NULL;
|
|
swdmover_backend.dmb_algdescs = swdmover_algdescs;
|
|
swdmover_backend.dmb_nalgdescs = SWDMOVER_ALGDESC_COUNT;
|
|
swdmover_backend.dmb_process = swdmover_process;
|
|
|
|
kthread_create(swdmover_create_thread, &swdmover_backend);
|
|
|
|
/* XXX Should only register this when kthread creation succeeds. */
|
|
dmover_backend_register(&swdmover_backend);
|
|
}
|