/*
 * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
 * 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.
 * 3. Neither the name of Hyra 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
 */

#ifndef _PCI_RESOURCE_H_
#define _PCI_RESOURCE_H_

#include <machine/bus.h>

/* Enable/disable DMA (bus mastering in this case) */
int pcir_enable_dma(struct bus_resource *brp, void *devp);
int pcir_disable_dma(struct bus_resource *brp, void *devp);

/* Set/unset bus resource semantics */
int pcir_set_sem(struct bus_resource *brp, bus_sem_t sem);
int pcir_clr_sem(struct bus_resource *brp, bus_sem_t sem);

/* DMA buffer helpers (XXX: unused for now) */
int pcir_dma_alloc(struct bus_resource *brp, void *res);
int pcir_dma_free(struct bus_resource *brp, void *p);

/* DMA transaction helpers (XXX: unused for now) */
ssize_t pcir_dma_in(struct bus_resource *brp, void *p);
ssize_t pcir_dma_out(struct bus_resource *brp, void *p);

#endif  /* !_PCI_RESOURCE_H_ */