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      1 /*	$NetBSD: drmfb.h,v 1.3 2021/12/19 12:21:30 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_DRM_DRMFB_H_
     33 #define	_DRM_DRMFB_H_
     34 
     35 #include <sys/device_if.h>
     36 
     37 #include <dev/wsfb/genfbvar.h>
     38 
     39 struct drm_device;
     40 struct drm_fb_helper;
     41 struct drm_fb_helper_surface_sizes;
     42 
     43 struct drmfb_attach_args;
     44 struct drmfb_params;
     45 struct drmfb_softc;
     46 
     47 struct drmfb_params {
     48 	/*
     49 	 * Framebuffer mmap.
     50 	 */
     51 	paddr_t		(*dp_mmapfb)(struct drmfb_softc *, off_t, int);
     52 
     53 	/*
     54 	 * Other mmap, e.g. for arbitrary PCI BARs.  Available only to
     55 	 * users with privileges for access to unmanaged memory.
     56 	 */
     57 	paddr_t		(*dp_mmap)(struct drmfb_softc *, off_t, int);
     58 
     59 	/*
     60 	 * Ioctl handler.  Must handle:
     61 	 *
     62 	 * - WSDISPLAYIO_GET_BUSID
     63 	 * - WSDISPLAYIO_GTYPE
     64 	 *
     65 	 * May add or override anything else.  Return EPASSTHROUGH to
     66 	 * defer.
     67 	 */
     68 	int		(*dp_ioctl)(struct drmfb_softc *, unsigned long,
     69 			    void *, int, struct lwp *);
     70 	/* XXX Kludge!  */
     71 	bool		(*dp_is_vga_console)(struct drm_device *);
     72 	void		(*dp_disable_vga)(struct drm_device *);
     73 };
     74 
     75 struct drmfb_attach_args {
     76 	device_t			da_dev;
     77 	struct drm_fb_helper		*da_fb_helper;
     78 	const struct drm_fb_helper_surface_size	*da_fb_sizes;
     79 	void				*da_fb_vaddr;
     80 	uint32_t			da_fb_linebytes;
     81 	const struct drmfb_params	*da_params;
     82 };
     83 
     84 /* Treat as opaque.  Must be first member of device softc.  */
     85 struct drmfb_softc {
     86 	struct genfb_softc		sc_genfb; /* XXX Must be first. */
     87 	struct drmfb_attach_args	sc_da;
     88 };
     89 
     90 int	drmfb_attach(struct drmfb_softc *, const struct drmfb_attach_args *);
     91 int	drmfb_detach(struct drmfb_softc *, int);
     92 bool	drmfb_shutdown(struct drmfb_softc *, int);
     93 
     94 #endif	/* _DRM_DRMFB_H_ */
     95