usr/src/uts/common/io/drm/drm_sunmod.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Common misc module interfaces of DRM under Solaris
 */

/*
 * I915 DRM Driver for Solaris
 *
 * This driver provides the hardware 3D acceleration support for Intel
 * integrated video devices (e.g. i8xx/i915/i945 series chipsets), under the
 * DRI (Direct Rendering Infrastructure). DRM (Direct Rendering Manager) here
 * means the kernel device driver in DRI.
 *
 * I915 driver is a device dependent driver only, it depends on a misc module
 * named drm for generic DRM operations.
 *
 * This driver also calls into gfx and agpmaster misc modules respectively for
 * generic graphics operations and AGP master device support.
 */

#ifndef	_SYS_DRM_SUNMOD_H_
#define	_SYS_DRM_SUNMOD_H_

#ifdef	__cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include <sys/errno.h>
#include <sys/conf.h>
#include <sys/kmem.h>
#include <sys/visual_io.h>
#include <sys/fbio.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/open.h>
#include <sys/modctl.h>
#include <sys/vgareg.h>
#include <sys/vgasubr.h>
#include <sys/pci.h>
#include <sys/kd.h>
#include <sys/ddi_impldefs.h>
#include <sys/sunldi.h>
#include <sys/mkdev.h>
#include <sys/gfx_private.h>
#include <sys/agpgart.h>
#include <sys/agp/agpdefs.h>
#include <sys/agp/agpmaster_io.h>
#include "drmP.h"
#include <sys/modctl.h>

/*
 * dev_t of this driver looks consists of:
 *
 * major number with NBITSMAJOR bits
 * instance node number with NBITSINST bits
 * minor node number with NBITSMINOR - NBITSINST bits
 *
 * Each instance has at most 2^(NBITSMINOR - NBITSINST) minor nodes, the first
 * three are:
 * 0: gfx<instance number>, graphics common node
 * 1: agpmaster<instance number>, agpmaster node
 * 2: drm<instance number>, drm node
 */
#define	GFX_MINOR		0
#define	AGPMASTER_MINOR		1
#define	DRM_MINOR		2
#define	DRM_MIN_CLONEMINOR	3

/*
 * Number of bits occupied by instance number in dev_t, currently maximum 8
 * instances are supported.
 */
#define	NBITSINST		3

/* Number of bits occupied in dev_t by minor node */
#define	NBITSMNODE		(18 - NBITSINST)

/*
 * DRM use a "cloning" minor node mechanism to release lock on every close(2),
 * thus there will be a minor node for every open(2) operation. Here we give
 * the maximum DRM cloning minor node number.
 */
#define	MAX_CLONE_MINOR		(1 << (NBITSMNODE) - 1)
#define	DEV2MINOR(dev)		(getminor(dev) & ((1 << (NBITSMNODE)) - 1))
#define	DEV2INST(dev)		(getminor(dev) >> NBITSMNODE)
#define	INST2NODE0(inst)	((inst) << NBITSMNODE)
#define	INST2NODE1(inst)	(((inst) << NBITSMNODE) + AGPMASTER_MINOR)
#define	INST2NODE2(inst)	(((inst) << NBITSMNODE) + DRM_MINOR)

/* graphics name for the common graphics minor node */
#define	GFX_NAME		"gfx"


/*
 * softstate for DRM module
 */
typedef struct drm_instance_state {
	kmutex_t		mis_lock;
	kmutex_t		dis_ctxlock;
	major_t			mis_major;
	dev_info_t		*mis_dip;
	drm_device_t	*mis_devp;
	ddi_acc_handle_t	mis_cfg_hdl;
	agp_master_softc_t	*mis_agpm;	/* agpmaster softstate ptr */
	gfxp_vgatext_softc_ptr_t	mis_gfxp;	/* gfx softstate */
} drm_inst_state_t;


struct drm_inst_state_list {
	drm_inst_state_t	disl_state;
	struct drm_inst_state_list *disl_next;

};
typedef struct drm_inst_state_list drm_inst_list_t;


/* Identifier of this driver */
static struct vis_identifier text_ident = { "SUNWdrm" };
static int drm_sun_open(dev_t *, int, int, cred_t *);
static int drm_sun_close(dev_t, int, int, cred_t *);
static int drm_sun_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
static int drm_sun_devmap(dev_t, devmap_cookie_t,
	offset_t, size_t, size_t *, uint_t);

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_DRM_SUNMOD_H_ */