sys/dev/pci: New bochsfb driver

Signed-off-by: Jiaxun Yang <[email protected]>

Author: FlyGoat

share/man/man4/Makefile

@@ -11,7 +11,7 @@ MAN=	aac.4 ac97.4 acardide.4 aceride.4 acphy.4 \
 	auacer.4 audio.4 audiocs.4 auich.4 \
 	auixp.4 autri.4 auvia.4 awi.4 \
 	battery_pmu.4 bba.4 bce.4 bcsp.4 be.4 bge.4 bnx.4 bha.4 \
-	bio.4 bktr.4 bluetooth.4 bmx280thp.4 bmtphy.4 bpf.4 bpfjit.4 \
+	bio.4 bktr.4 bochsfb.4 bluetooth.4 bmx280thp.4 bmtphy.4 bpf.4 bpfjit.4 \
 	brgphy.4 bridge.4 bthidev.4 bthub.4 btkbd.4 \
 	btmagic.4 btms.4 btsco.4 btuart.4 \
 	bwfm.4 bwi.4 \

share/man/man4/bochsfb.4

@@ -0,0 +1,77 @@
+.\"	$NetBSD$
+.\"
+.\" Copyright (c) 2025
+.\"	 The NetBSD Foundation, Inc.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Jiaxun Yang.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd March 2, 2025
+.Dt BOCHSFB 4
+.Os
+.Sh NAME
+.Nm bochsfb
+.Nd Bochs Display Interface framebuffer
+.Sh SYNOPSIS
+.Cd "bochsfb* at pci?"
+.Cd "wsdisplay* at bochsfb?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for graphics devices implementing the Bochs VBE
+DISPI interface, including the Bochs reference VGA implementation, the QEMU
+StdVGA device, and the VGA-compatible
+.Xr virtio 4
+GPUs.
+It programs the linear framebuffer through the DISPI registers and makes it
+available through
+.Xr wsdisplay 4
+as a console or
+.Xr wsfb 4
+-compatible framebuffer.
+.Pp
+When a memory-mapped DISPI bar with an EDID block is present,
+.Nm
+uses the preferred mode reported by the display.
+Devices without EDID support (such as virtio-vga) fall back to a 1024x768
+32-bit mode.
+If no MMIO bar is available, the driver accesses the DISPI registers via the
+legacy VGA I/O ports.
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr pci 4 ,
+.Xr vga 4 ,
+.Xr wscons 4 ,
+.Xr wsdisplay 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx 11 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Jiaxun Yang Aq Mt [email protected] .

sys/arch/evbarm/conf/GENERIC

@@ -522,6 +522,7 @@ hdmicec* 	at hdmicecbus?
 #tegradrm* 	at fdt?			# NVIDIA Tegra Display
 #tegrafb* 	at tegrafbbus?
 dwhdmi* 	at fdt?			# Designware HDMI TX
+bochsfb*	at pci? dev ? function ? # Bochs framebuffer (QEMU)
 genfb* 		at fdt?			# Simple Framebuffer
 mesonfb* 	at fdt?			# Amlogic Meson Framebuffer
 omapfb* 	at fdt?			# TI OMAP3 Framebuffer

sys/arch/evbarm/conf/GENERIC64

@@ -508,6 +508,7 @@ sunxilcdc*	at fdt?			# Allwinner DE2 timing controller
 sunximixer*	at fdt?			# Allwinner DE2 mixer
 #tegradrm*	at fdt?			# NVIDIA Tegra Display
 #tegrafb*	at tegrafbbus?
+bochsfb*	at pci? dev ? function ? # Bochs framebuffer (QEMU)
 genfb*		at fdt?			# Simple Framebuffer
 wsdisplay*	at wsemuldisplaydev?
 options 	VCONS_DRAW_INTR