0387ef1314
enable with options GENFB_GLYPHCACHE=n with n being the desired size of the cache in MB. Should be enough to cache at least 900 glyphs in whatever video mode used in order to be effective in 32bit per pixel that's about 1MB
181 lines
6.1 KiB
C
181 lines
6.1 KiB
C
/* $NetBSD: genfbvar.h,v 1.26 2021/01/27 22:42:53 macallan Exp $ */
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/*-
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* Copyright (c) 2007 Michael Lorenz
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef GENFBVAR_H
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#define GENFBVAR_H
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#ifdef _KERNEL_OPT
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#include "opt_splash.h"
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#endif
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsdisplayvar.h>
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#include <dev/rasops/rasops.h>
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#include <dev/wscons/wsdisplay_vconsvar.h>
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#ifdef _KERNEL_OPT
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#include "opt_genfb.h"
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#endif
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#ifdef SPLASHSCREEN
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#define GENFB_DISABLE_TEXT
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#include <dev/splash/splash.h>
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#endif
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#if GENFB_GLYPHCACHE > 0
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#include <dev/wscons/wsdisplay_glyphcachevar.h>
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#endif
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struct genfb_softc;
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struct genfb_ops {
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int (*genfb_ioctl)(void *, void *, u_long, void *, int, struct lwp *);
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paddr_t (*genfb_mmap)(void *, void *, off_t, int);
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int (*genfb_borrow)(void *, bus_addr_t, bus_space_handle_t *);
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int (*genfb_enable_polling)(void *);
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int (*genfb_disable_polling)(void *);
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};
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struct genfb_colormap_callback {
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void *gcc_cookie;
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void (*gcc_set_mapreg)(void *, int, int, int, int);
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};
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/*
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* Integer parameter provider. Each callback shall return 0 on success,
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* and an error(2) number on failure. The gpc_upd_parameter callback is
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* optional (i.e. it can be NULL).
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*
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* This structure is used for backlight and brightness control. The
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* expected parameter range is:
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*
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* [0, 1] for backlight
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* [0, 255] for brightness
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*/
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struct genfb_parameter_callback {
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void *gpc_cookie;
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int (*gpc_get_parameter)(void *, int *);
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int (*gpc_set_parameter)(void *, int);
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int (*gpc_upd_parameter)(void *, int);
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};
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struct genfb_pmf_callback {
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bool (*gpc_suspend)(device_t, const pmf_qual_t *);
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bool (*gpc_resume)(device_t, const pmf_qual_t *);
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};
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struct genfb_mode_callback {
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bool (*gmc_setmode)(struct genfb_softc *, int);
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};
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struct genfb_softc {
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device_t sc_dev;
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struct vcons_data vd;
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struct genfb_ops sc_ops;
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struct vcons_screen sc_console_screen;
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struct wsscreen_descr sc_defaultscreen_descr;
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const struct wsscreen_descr *sc_screens[1];
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struct wsscreen_list sc_screenlist;
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struct genfb_colormap_callback *sc_cmcb;
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struct genfb_pmf_callback *sc_pmfcb;
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struct genfb_parameter_callback *sc_backlight;
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struct genfb_parameter_callback *sc_brightness;
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struct genfb_mode_callback *sc_modecb;
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int sc_backlight_level, sc_backlight_on;
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void *sc_fbaddr; /* kva */
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void *sc_shadowfb;
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bool sc_enable_shadowfb;
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bus_addr_t sc_fboffset; /* bus address */
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int sc_width, sc_height, sc_stride, sc_depth;
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size_t sc_fbsize;
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int sc_mode;
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u_char sc_cmap_red[256];
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u_char sc_cmap_green[256];
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u_char sc_cmap_blue[256];
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bool sc_want_clear;
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#ifdef SPLASHSCREEN
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struct splash_info sc_splash;
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#endif
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struct wsdisplay_accessops sc_accessops;
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#if GENFB_GLYPHCACHE > 0
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/*
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* The generic glyphcache code makes a bunch of assumptions that are
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* true for most graphics hardware with a directly supported blitter.
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* For example it assume that
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* - VRAM access from the host is expensive
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* - copying data around in VRAM is cheap and can happen in parallel
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* to the host CPU
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* -> therefore we draw glyphs normally if we have to, so the ( assumed
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* to be hardware assisted ) driver supplied putchar() method doesn't
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* need to be glyphcache aware, then copy them away for later use
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* for genfb things are a bit different. On most hardware:
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* - VRAM access from the host is still expensive
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* - copying data around in VRAM is also expensive since we don't have
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* a blitter and VRAM is mapped uncached
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* - VRAM reads are usually slower than writes ( write combining and
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* such help writes but not reads, and VRAM might be behind an
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* asymmetric bus like AGP ) and must be avoided, both are much
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* slower than main memory
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* -> therefore we cache glyphs in main memory, no reason to map it
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* uncached, we draw into the cache first and then copy the glyph
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* into video memory to avoid framebuffer reads and to allow more
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* efficient write accesses than putchar() would offer
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* Because of this we can't use the generic code but we can recycle a
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* few data structures.
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*/
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uint8_t *sc_cache;
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struct rasops_info sc_cache_ri;
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void (*sc_putchar)(void *, int, int, u_int, long);
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int sc_cache_cells;
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int sc_nbuckets; /* buckets allocated */
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gc_bucket *sc_buckets; /* we allocate as many as we can get into ram */
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int sc_attrmap[256]; /* mapping a colour attribute to a bucket */
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#endif
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};
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void genfb_cnattach(void);
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void genfb_disable(void);
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int genfb_is_console(void);
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int genfb_is_enabled(void);
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void genfb_init(struct genfb_softc *);
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int genfb_attach(struct genfb_softc *, struct genfb_ops *);
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int genfb_borrow(bus_addr_t, bus_space_handle_t *);
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void genfb_restore_palette(struct genfb_softc *);
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void genfb_enable_polling(device_t);
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void genfb_disable_polling(device_t);
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#endif /* GENFBVAR_H */
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