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Add VT driver for VBE framebuffer device

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Implement vt_vbefb to support Vesa Bios Extensions (VBE) framebuffer with VT.
vt_vbefb is built based on vt_efifb and is assuming similar data for
initialization, use MODINFOMD_VBE_FB to identify the structure vbe_fb
in kernel metadata.

struct vbe_fb, is populated by boot loader, and is passed to kernel via
metadata payload.

Differential Revision:	https://reviews.freebsd.org/D27373
This commit is contained in:
Toomas Soome 2020-11-30 08:22:40 +00:00
parent 52a832072d
commit a4a10b37d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=368168
9 changed files with 205 additions and 9 deletions
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1
sys/amd64/conf/GENERIC
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@ -218,6 +218,7 @@ options SC_PIXEL_MODE # add support for the raster text mode
device vt
device vt_vga
device vt_efifb
device vt_vbefb
device agp # support several AGP chipsets

1
sys/amd64/conf/MINIMAL
View File

@ -126,6 +126,7 @@ options SC_PIXEL_MODE # add support for the raster text mode
device vt
device vt_vga
device vt_efifb
device vt_vbefb
device agp # support several AGP chipsets

1
sys/amd64/conf/NOTES
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@ -255,6 +255,7 @@ options VGA_DEBUG
# vt(4) drivers.
device vt_vga # VGA
device vt_efifb # EFI framebuffer
device vt_vbefb # VBE framebuffer
# Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
device s3pci

1
sys/conf/files
View File

@ -3474,6 +3474,7 @@ dev/vt/colors/vt_termcolors.c optional vt
dev/vt/font/vt_font_default.c optional vt
dev/vt/font/vt_mouse_cursor.c optional vt
dev/vt/hw/efifb/efifb.c optional vt_efifb
dev/vt/hw/vbefb/vbefb.c optional vt_vbefb
dev/vt/hw/fb/vt_fb.c optional vt
dev/vt/hw/vga/vt_vga.c optional vt vt_vga
dev/vt/logo/logo_freebsd.c optional vt splash

34
sys/dev/hyperv/vmbus/vmbus.c
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@ -1337,8 +1337,8 @@ vmbus_get_mmio_res(device_t dev)
/*
* On Gen2 VMs, Hyper-V provides mmio space for framebuffer.
* This mmio address range is not useable for other PCI devices.
* Currently only efifb driver is using this range without reserving
* it from system.
* Currently only efifb and vbefb drivers are using this range without
* reserving it from system.
* Therefore, vmbus driver reserves it before any other PCI device
* drivers start to request mmio addresses.
*/
@ -1348,6 +1348,9 @@ static void
vmbus_fb_mmio_res(device_t dev)
{
struct efi_fb *efifb;
struct vbe_fb *vbefb;
rman_res_t fb_start, fb_end, fb_count;
int fb_height, fb_width;
caddr_t kmdp;
struct vmbus_softc *sc = device_get_softc(dev);
@ -1359,30 +1362,43 @@ vmbus_fb_mmio_res(device_t dev)
efifb = (struct efi_fb *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_EFI_FB);
if (efifb == NULL) {
vbefb = (struct vbe_fb *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_VBE_FB);
fb_start = vbefb->fb_addr;
fb_end = vbefb->fb_addr + vbefb->fb_size;
fb_count = vbefb->fb_size;
fb_height = efifb->fb_height;
fb_width = efifb->fb_width;
} else {
fb_start = efifb->fb_addr;
fb_end = efifb->fb_addr + efifb->fb_size;
fb_count = efifb->fb_size;
fb_height = efifb->fb_height;
fb_width = efifb->fb_width;
}
if (fb_start == 0) {
if (bootverbose)
device_printf(dev,
"fb has no preloaded kernel efi information\n");
"no preloaded kernel fb information\n");
/* We are on Gen1 VM, just return. */
return;
} else {
if (bootverbose)
device_printf(dev,
"efifb: fb_addr: %#jx, size: %#jx, "
"fb: fb_addr: %#jx, size: %#jx, "
"actual size needed: 0x%x\n",
efifb->fb_addr, efifb->fb_size,
(int) efifb->fb_height * efifb->fb_width);
fb_start, fb_count, fb_height * fb_width);
}
hv_fb_res = pcib_host_res_alloc(&sc->vmbus_mmio_res, dev,
SYS_RES_MEMORY, &rid,
efifb->fb_addr, efifb->fb_addr + efifb->fb_size, efifb->fb_size,
SYS_RES_MEMORY, &rid, fb_start, fb_end, fb_count,
RF_ACTIVE | rman_make_alignment_flags(PAGE_SIZE));
if (hv_fb_res && bootverbose)
device_printf(dev,
"successfully reserved memory for framebuffer "
"starting at %#jx, size %#jx\n",
efifb->fb_addr, efifb->fb_size);
fb_start, fb_count);
}
static void

153
sys/dev/vt/hw/vbefb/vbefb.c Normal file
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@ -0,0 +1,153 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2014 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Aleksandr Rybalko under sponsorship from the
* FreeBSD Foundation.
*
* 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/fbio.h>
#include <sys/linker.h>
#include "opt_platform.h"
#include <machine/metadata.h>
#include <machine/vmparam.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/vt/vt.h>
#include <dev/vt/hw/fb/vt_fb.h>
#include <dev/vt/colors/vt_termcolors.h>
static vd_init_t vt_vbefb_init;
static vd_probe_t vt_vbefb_probe;
static struct vt_driver vt_vbefb_driver = {
.vd_name = "vbefb",
.vd_probe = vt_vbefb_probe,
.vd_init = vt_vbefb_init,
.vd_blank = vt_fb_blank,
.vd_bitblt_text = vt_fb_bitblt_text,
.vd_invalidate_text = vt_fb_invalidate_text,
.vd_bitblt_bmp = vt_fb_bitblt_bitmap,
.vd_drawrect = vt_fb_drawrect,
.vd_setpixel = vt_fb_setpixel,
.vd_fb_ioctl = vt_fb_ioctl,
.vd_fb_mmap = vt_fb_mmap,
.vd_suspend = vt_suspend,
.vd_resume = vt_resume,
/* Better than VGA, but still generic driver. */
.vd_priority = VD_PRIORITY_GENERIC + 1,
};
static struct fb_info local_vbe_info;
VT_DRIVER_DECLARE(vt_vbefb, vt_vbefb_driver);
static int
vt_vbefb_probe(struct vt_device *vd)
{
int disabled;
struct vbe_fb *vbefb;
caddr_t kmdp;
disabled = 0;
TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
if (disabled != 0)
return (CN_DEAD);
kmdp = preload_search_by_type("elf kernel");
if (kmdp == NULL)
kmdp = preload_search_by_type("elf64 kernel");
vbefb = (struct vbe_fb *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_VBE_FB);
if (vbefb == NULL)
return (CN_DEAD);
return (CN_INTERNAL);
}
static int
vt_vbefb_init(struct vt_device *vd)
{
struct fb_info *info;
struct vbe_fb *vbefb;
caddr_t kmdp;
int format, roff, goff, boff;
info = vd->vd_softc;
if (info == NULL)
info = vd->vd_softc = (void *)&local_vbe_info;
kmdp = preload_search_by_type("elf kernel");
if (kmdp == NULL)
kmdp = preload_search_by_type("elf64 kernel");
vbefb = (struct vbe_fb *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_VBE_FB);
if (vbefb == NULL)
return (CN_DEAD);
info->fb_height = vbefb->fb_height;
info->fb_width = vbefb->fb_width;
info->fb_depth = vbefb->fb_bpp;
/* Round to a multiple of the bits in a byte. */
info->fb_bpp = roundup2(vbefb->fb_bpp, NBBY);
/* Stride in bytes, not pixels */
info->fb_stride = vbefb->fb_stride * (info->fb_bpp / NBBY);
if (info->fb_depth == 8)
format = COLOR_FORMAT_VGA;
else
format = COLOR_FORMAT_RGB;
roff = ffs(vbefb->fb_mask_red) - 1;
goff = ffs(vbefb->fb_mask_green) - 1;
boff = ffs(vbefb->fb_mask_blue) - 1;
vt_generate_cons_palette(info->fb_cmap, format,
vbefb->fb_mask_red >> roff, roff,
vbefb->fb_mask_green >> goff, goff,
vbefb->fb_mask_blue >> boff, boff);
/* Mark cmap initialized. */
info->fb_cmsize = NCOLORS;
info->fb_size = info->fb_height * info->fb_stride;
info->fb_pbase = vbefb->fb_addr;
info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase,
info->fb_size, VM_MEMATTR_WRITE_COMBINING);
vt_fb_init(vd);
return (CN_INTERNAL);
}

1
sys/i386/conf/MINIMAL
View File

@ -126,6 +126,7 @@ options SC_PIXEL_MODE # add support for the raster text mode
device vt
device vt_vga
device vt_efifb
device vt_vbefb
device agp # support several AGP chipsets

8
sys/kern/subr_module.c
View File

@ -415,6 +415,11 @@ preload_modinfo_type(struct sbuf *sbp, int type)
case MODINFOMD_MODULEP:
sbuf_cat(sbp, "MODINFOMD_MODULEP");
break;
#endif
#ifdef MODINFOMD_VBE_FB
case MODINFOMD_VBE_FB:
sbuf_cat(sbp, "MODINFOMD_VBE_FB");
break;
#endif
default:
sbuf_cat(sbp, "unrecognized metadata type");
@ -461,6 +466,9 @@ preload_modinfo_value(struct sbuf *sbp, uint32_t *bptr, int type, int len)
#endif
#ifdef MODINFOMD_EFI_FB
case MODINFO_METADATA | MODINFOMD_EFI_FB:
#endif
#ifdef MODINFOMD_VBE_FB
case MODINFO_METADATA | MODINFOMD_VBE_FB:
#endif
sbuf_print_vmoffset(sbp, *(vm_offset_t *)bptr);
break;

14
sys/x86/include/metadata.h
View File

@ -35,6 +35,7 @@
#define MODINFOMD_EFI_MAP 0x1004
#define MODINFOMD_EFI_FB 0x1005
#define MODINFOMD_MODULEP 0x1006
#define MODINFOMD_VBE_FB 0x1007
struct efi_map_header {
uint64_t memory_size;
@ -54,4 +55,17 @@ struct efi_fb {
uint32_t fb_mask_reserved;
};
struct vbe_fb {
uint64_t fb_addr;
uint64_t fb_size;
uint32_t fb_height;
uint32_t fb_width;
uint32_t fb_stride;
uint32_t fb_mask_red;
uint32_t fb_mask_green;
uint32_t fb_mask_blue;
uint32_t fb_mask_reserved;
uint32_t fb_bpp;
};
#endif /* !_MACHINE_METADATA_H_ */