/*
* Copyright (c) 2019 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 _VIRTIO_BLK_H_
#define _VIRTIO_BLK_H_
#include <virtio-pci.h>
#include <bd_srv.h>
#include <abi/cap.h>
#include <fibril_synch.h>
#define VIRTIO_BLK_BLOCK_SIZE 512
/* Operation types. */
#define VIRTIO_BLK_T_IN 0
#define VIRTIO_BLK_T_OUT 1
/* Status codes returned by the device. */
#define VIRTIO_BLK_S_OK 0
#define VIRTIO_BLK_S_IOERR 1
#define VIRTIO_BLK_S_UNSUPP 2
#define RQ_BUFFERS 32
/** Device is read-only. */
#define VIRTIO_BLK_F_RO (1U << 5)
typedef struct {
uint32_t type;
uint32_t reserved;
uint64_t sector;
} virtio_blk_req_header_t;
typedef struct {
uint8_t status;
} virtio_blk_req_footer_t;
typedef struct {
uint64_t capacity;
} virtio_blk_cfg_t;
typedef struct {
virtio_dev_t virtio_dev;
void *rq_header[RQ_BUFFERS];
uintptr_t rq_header_p[RQ_BUFFERS];
void *rq_buf[RQ_BUFFERS];
uintptr_t rq_buf_p[RQ_BUFFERS];
void *rq_footer[RQ_BUFFERS];
uintptr_t rq_footer_p[RQ_BUFFERS];
uint16_t rq_free_head;
int irq;
cap_irq_handle_t irq_handle;
bd_srvs_t bds;
fibril_mutex_t free_lock;
fibril_condvar_t free_cv;
fibril_mutex_t completion_lock[RQ_BUFFERS];
fibril_condvar_t completion_cv[RQ_BUFFERS];
} virtio_blk_t;
#endif