/*-
 * Written by: David Jeffery
 * Copyright (c) 2002 Adaptec Inc.
 * 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: src/sys/dev/ips/ips_ioctl.c,v 1.5 2004/05/30 04:01:29 scottl Exp $
 */

#include <dev/raid/ips/ips.h>
#include <dev/raid/ips/ips_ioctl.h>

static void
ips_ioctl_finish(ips_command_t *command)
{
	ips_ioctl_t *ioctl_cmd = command->arg;

	if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
		    BUS_DMASYNC_POSTREAD);
	} else if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
		    BUS_DMASYNC_POSTWRITE);
	}
	bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
	    BUS_DMASYNC_POSTWRITE);
	bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
	ioctl_cmd->status.value = command->status.value;
	ips_insert_free_cmd(command->sc, command);
}

static void
ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,
    int segnum, int error)
{
	ips_command_t *command;
	ips_ioctl_t *ioctl_cmd;
	ips_generic_cmd *command_buffer;

	command = cmdptr;
	ioctl_cmd = command->arg;
	command_buffer = command->command_buffer;
	if (error) {
		ioctl_cmd->status.value = IPS_ERROR_STATUS;
		ips_insert_free_cmd(command->sc, command);
		return;
	}
	command_buffer->id = command->id;
	command_buffer->buffaddr = segments[0].ds_addr;
	if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
		    BUS_DMASYNC_PREWRITE);
	} else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
		bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
		    BUS_DMASYNC_PREREAD);
	}
	bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
	    BUS_DMASYNC_PREWRITE);
	command->sc->ips_issue_cmd(command);
}

static int
ips_ioctl_start(ips_command_t *command)
{
	ips_ioctl_t *ioctl_cmd = command->arg;

	memcpy(command->command_buffer, ioctl_cmd->command_buffer,
	    sizeof(ips_generic_cmd));
	command->callback = ips_ioctl_finish;
	bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
	    ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback,
	    command, 0);
	return 0;
}

static int
ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd,
    ips_user_request *user_request)
{
	ips_command_t *command;
	int error = EINVAL;

	if (bus_dma_tag_create(
			/* parent    */	sc->adapter_dmatag,
			/* alignment */	1,
			/* boundary  */	0,
			/* lowaddr   */	BUS_SPACE_MAXADDR_32BIT,
			/* highaddr  */	BUS_SPACE_MAXADDR,
			/* maxsize   */	ioctl_cmd->datasize,
			/* numsegs   */	1,
			/* maxsegsize*/	ioctl_cmd->datasize,
			/* flags     */	0,
			&ioctl_cmd->dmatag) != 0) {
		return ENOMEM;
	}
	if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
	    0, &ioctl_cmd->dmamap)) {
		error = ENOMEM;
		goto exit;
	}
	if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer,
	    ioctl_cmd->datasize))
		goto exit;
	ioctl_cmd->status.value = 0xffffffff;
	lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
	if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) {
		error = ENOMEM;
		lockmgr(&sc->queue_lock, LK_RELEASE);
		goto exit;
	}
	command->arg = ioctl_cmd;
	ips_ioctl_start(command);
	while (ioctl_cmd->status.value == 0xffffffff)
		tsleep(ioctl_cmd, 0, "ips", hz / 10);
	if (COMMAND_ERROR(&ioctl_cmd->status))
		error = EIO;
	else
		error = 0;
	lockmgr(&sc->queue_lock, LK_RELEASE);

	if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
	    ioctl_cmd->datasize))
		error = EINVAL;
exit:
	bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
	    ioctl_cmd->dmamap);
	bus_dma_tag_destroy(ioctl_cmd->dmatag);
	return error;
}

int
ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
    int32_t flags)
{
	ips_ioctl_t *ioctl_cmd;
	ips_user_request *user_request;
	int error = EINVAL;

	switch (ioctl_request) {
	case IPS_USER_CMD:
		user_request = (ips_user_request *)addr;
		ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
		ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd),
		    M_IPSBUF, M_WAITOK);
		if (copyin(user_request->command_buffer,
		    ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
			kfree(ioctl_cmd->command_buffer, M_IPSBUF);
			kfree(ioctl_cmd, M_IPSBUF);
			break;
		}
		ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
		ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
		error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
		kfree(ioctl_cmd->command_buffer, M_IPSBUF);
		kfree(ioctl_cmd, M_IPSBUF);
		break;
	}
	return error;
}