with old kernels, by breaking the support for large frame buffers in the same way as for current kernels. Large frame buffers may be too large to map into kva, and the kernel (syscons) only uses the first screen page anyway, so r203535, r205557 and 248799 limit the buffer size in VESA modes to the first screen page, apparently without noticing that this breaks applications by using the same limit for user mappings as for kernel mappings. In vgl, this makes the virtual screen the same as the physical screen. However, this is almost a feature since clearing and switching large (usually mostly unused) frame buffers takes too long. E.g., on a 16 year old low-end AGP card it takes about 12 seconds to clear the 128MB frame buffer in old kernels that map it all and also map it with slow attributes (e.g., uncacheable). Older PCI cards are even slower, but usually have less memory. Newer PCIe cards are faster, but may have many GB of memory. Also, vgl malloc()s a shadow buffer with the same size as the frame buffer, so large frame buffers are even more wasteful in applications than in the kernel. Use the same limit in vgl as in newer kernels. Virtual screens and panning still work in non-VESA modes that have more than 1 page. The reduced buffer size in the kernel also breaks mmap() of the last physical page in modes where the reduced size is not a multiple of the physical page size. The same reduction in vgl only reduces the virtual screen size.
607 lines
16 KiB
C
607 lines
16 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991-1997 Søren Schmidt
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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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* in this position and unchanged.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <signal.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/fbio.h>
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#include <sys/kbio.h>
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#include <sys/consio.h>
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#include "vgl.h"
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/* XXX Direct Color 24bits modes unsupported */
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#define min(x, y) (((x) < (y)) ? (x) : (y))
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#define max(x, y) (((x) > (y)) ? (x) : (y))
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VGLBitmap *VGLDisplay;
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video_info_t VGLModeInfo;
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video_adapter_info_t VGLAdpInfo;
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byte *VGLBuf;
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static int VGLMode;
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static int VGLOldMode;
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static size_t VGLBufSize;
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static byte *VGLMem = MAP_FAILED;
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static int VGLSwitchPending;
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static int VGLAbortPending;
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static int VGLOnDisplay;
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static unsigned int VGLCurWindow;
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static int VGLInitDone = 0;
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static video_info_t VGLOldModeInfo;
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static vid_info_t VGLOldVInfo;
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void
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VGLEnd()
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{
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struct vt_mode smode;
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int size[3];
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if (!VGLInitDone)
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return;
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VGLInitDone = 0;
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VGLSwitchPending = 0;
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VGLAbortPending = 0;
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signal(SIGUSR1, SIG_IGN);
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if (VGLMem != MAP_FAILED) {
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VGLClear(VGLDisplay, 0);
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munmap(VGLMem, VGLAdpInfo.va_window_size);
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}
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if (VGLOldMode >= M_VESA_BASE)
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ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
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else
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ioctl(0, _IO('S', VGLOldMode), 0);
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if (VGLOldModeInfo.vi_flags & V_INFO_GRAPHICS) {
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size[0] = VGLOldVInfo.mv_csz;
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size[1] = VGLOldVInfo.mv_rsz;
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size[2] = VGLOldVInfo.font_size;;
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ioctl(0, KDRASTER, size);
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}
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ioctl(0, KDDISABIO, 0);
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ioctl(0, KDSETMODE, KD_TEXT);
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smode.mode = VT_AUTO;
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ioctl(0, VT_SETMODE, &smode);
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if (VGLBuf)
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free(VGLBuf);
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VGLBuf = NULL;
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free(VGLDisplay);
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VGLDisplay = NULL;
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VGLKeyboardEnd();
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}
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static void
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VGLAbort(int arg)
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{
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sigset_t mask;
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VGLAbortPending = 1;
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signal(SIGINT, SIG_IGN);
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signal(SIGTERM, SIG_IGN);
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signal(SIGUSR2, SIG_IGN);
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if (arg == SIGBUS || arg == SIGSEGV) {
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signal(arg, SIG_DFL);
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sigemptyset(&mask);
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sigaddset(&mask, arg);
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sigprocmask(SIG_UNBLOCK, &mask, NULL);
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VGLEnd();
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kill(getpid(), arg);
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}
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}
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static void
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VGLSwitch(int arg __unused)
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{
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if (!VGLOnDisplay)
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VGLOnDisplay = 1;
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else
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VGLOnDisplay = 0;
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VGLSwitchPending = 1;
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signal(SIGUSR1, VGLSwitch);
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}
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int
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VGLInit(int mode)
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{
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struct vt_mode smode;
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int adptype, depth;
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if (VGLInitDone)
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return -1;
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signal(SIGUSR1, VGLSwitch);
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signal(SIGINT, VGLAbort);
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signal(SIGTERM, VGLAbort);
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signal(SIGSEGV, VGLAbort);
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signal(SIGBUS, VGLAbort);
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signal(SIGUSR2, SIG_IGN);
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VGLOnDisplay = 1;
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VGLSwitchPending = 0;
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VGLAbortPending = 0;
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if (ioctl(0, CONS_GET, &VGLOldMode) || ioctl(0, CONS_CURRENT, &adptype))
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return -1;
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if (IOCGROUP(mode) == 'V') /* XXX: this is ugly */
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VGLModeInfo.vi_mode = (mode & 0x0ff) + M_VESA_BASE;
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else
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VGLModeInfo.vi_mode = mode & 0x0ff;
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if (ioctl(0, CONS_MODEINFO, &VGLModeInfo)) /* FBIO_MODEINFO */
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return -1;
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/* Save info for old mode to restore font size if old mode is graphics. */
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VGLOldModeInfo.vi_mode = VGLOldMode;
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if (ioctl(0, CONS_MODEINFO, &VGLOldModeInfo))
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return -1;
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VGLOldVInfo.size = sizeof(VGLOldVInfo);
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if (ioctl(0, CONS_GETINFO, &VGLOldVInfo))
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return -1;
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VGLDisplay = (VGLBitmap *)malloc(sizeof(VGLBitmap));
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if (VGLDisplay == NULL)
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return -2;
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if (ioctl(0, KDENABIO, 0)) {
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free(VGLDisplay);
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return -3;
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}
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VGLInitDone = 1;
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/*
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* vi_mem_model specifies the memory model of the current video mode
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* in -CURRENT.
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*/
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switch (VGLModeInfo.vi_mem_model) {
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case V_INFO_MM_PLANAR:
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/* we can handle EGA/VGA planner modes only */
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if (VGLModeInfo.vi_depth != 4 || VGLModeInfo.vi_planes != 4
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|| (adptype != KD_EGA && adptype != KD_VGA)) {
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VGLEnd();
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return -4;
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}
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VGLDisplay->Type = VIDBUF4;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_PACKED:
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/* we can do only 256 color packed modes */
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if (VGLModeInfo.vi_depth != 8) {
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VGLEnd();
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return -4;
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}
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VGLDisplay->Type = VIDBUF8;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_VGAX:
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VGLDisplay->Type = VIDBUF8X;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_DIRECT:
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VGLDisplay->PixelBytes = VGLModeInfo.vi_pixel_size;
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switch (VGLDisplay->PixelBytes) {
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case 2:
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VGLDisplay->Type = VIDBUF16;
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break;
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#if notyet
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case 3:
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VGLDisplay->Type = VIDBUF24;
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break;
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#endif
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case 4:
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VGLDisplay->Type = VIDBUF32;
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break;
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default:
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VGLEnd();
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return -4;
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}
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break;
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default:
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VGLEnd();
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return -4;
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}
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ioctl(0, VT_WAITACTIVE, 0);
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ioctl(0, KDSETMODE, KD_GRAPHICS);
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if (ioctl(0, mode, 0)) {
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VGLEnd();
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return -5;
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}
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if (ioctl(0, CONS_ADPINFO, &VGLAdpInfo)) { /* FBIO_ADPINFO */
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VGLEnd();
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return -6;
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}
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/*
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* Calculate the shadow screen buffer size. In -CURRENT, va_buffer_size
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* always holds the entire frame buffer size, wheather it's in the linear
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* mode or windowed mode.
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* VGLBufSize = VGLAdpInfo.va_buffer_size;
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* In -STABLE, va_buffer_size holds the frame buffer size, only if
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* the linear frame buffer mode is supported. Otherwise the field is zero.
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* We shall calculate the minimal size in this case:
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* VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*VGLModeInfo.vi_planes
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* or
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* VGLAdpInfo.va_window_size*VGLModeInfo.vi_planes;
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* Use whichever is larger.
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*/
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if (VGLAdpInfo.va_buffer_size != 0)
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VGLBufSize = VGLAdpInfo.va_buffer_size;
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else
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VGLBufSize = max(VGLAdpInfo.va_line_width*VGLModeInfo.vi_height,
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VGLAdpInfo.va_window_size)*VGLModeInfo.vi_planes;
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/*
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* The above is for old -CURRENT. Current -CURRENT since r203535 and/or
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* r248799 restricts va_buffer_size to the displayed size in VESA modes to
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* avoid wasting kva for mapping unused parts of the frame buffer. But all
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* parts were usable here. Applying the same restriction to user mappings
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* makes our virtualization useless and breaks our panning, but large frame
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* buffers are also difficult for us to manage (clearing and switching may
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* be too slow, and malloc() may fail). Restrict ourselves similarly to
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* get the same efficiency and bugs for all kernels.
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*/
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if (0 && VGLModeInfo.vi_mode >= M_VESA_BASE)
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VGLBufSize = 2*VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*
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VGLModeInfo.vi_planes;
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VGLBuf = malloc(VGLBufSize);
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if (VGLBuf == NULL) {
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VGLEnd();
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return -7;
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}
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#ifdef LIBVGL_DEBUG
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fprintf(stderr, "VGLBufSize:0x%x\n", VGLBufSize);
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#endif
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/* see if we are in the windowed buffer mode or in the linear buffer mode */
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size) {
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switch (VGLDisplay->Type) {
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case VIDBUF4:
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VGLDisplay->Type = VIDBUF4S;
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break;
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case VIDBUF8:
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VGLDisplay->Type = VIDBUF8S;
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break;
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case VIDBUF16:
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VGLDisplay->Type = VIDBUF16S;
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break;
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case VIDBUF24:
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VGLDisplay->Type = VIDBUF24S;
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break;
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case VIDBUF32:
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VGLDisplay->Type = VIDBUF32S;
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break;
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default:
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VGLEnd();
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return -8;
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}
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}
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VGLMode = mode;
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VGLCurWindow = 0;
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VGLDisplay->Xsize = VGLModeInfo.vi_width;
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VGLDisplay->Ysize = VGLModeInfo.vi_height;
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depth = VGLModeInfo.vi_depth;
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if (depth == 15)
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depth = 16;
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VGLDisplay->VXsize = VGLAdpInfo.va_line_width
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*8/(depth/VGLModeInfo.vi_planes);
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VGLDisplay->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
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VGLDisplay->Xorigin = 0;
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VGLDisplay->Yorigin = 0;
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VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
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MAP_FILE | MAP_SHARED, 0, 0);
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if (VGLMem == MAP_FAILED) {
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VGLEnd();
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return -7;
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}
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VGLDisplay->Bitmap = VGLMem;
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VGLSavePalette();
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#ifdef LIBVGL_DEBUG
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fprintf(stderr, "va_line_width:%d\n", VGLAdpInfo.va_line_width);
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fprintf(stderr, "VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
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VGLDisplay->Xsize, VGLDisplay->Ysize,
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VGLDisplay->VXsize, VGLDisplay->VYsize);
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#endif
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smode.mode = VT_PROCESS;
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smode.waitv = 0;
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smode.relsig = SIGUSR1;
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smode.acqsig = SIGUSR1;
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smode.frsig = SIGINT;
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if (ioctl(0, VT_SETMODE, &smode)) {
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VGLEnd();
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return -9;
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}
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VGLTextSetFontFile((byte*)0);
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VGLClear(VGLDisplay, 0);
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return 0;
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}
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void
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VGLCheckSwitch()
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{
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if (VGLAbortPending) {
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VGLEnd();
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exit(0);
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}
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while (VGLSwitchPending) {
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unsigned int offset;
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unsigned int len;
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int i;
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VGLSwitchPending = 0;
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if (VGLOnDisplay) {
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ioctl(0, KDENABIO, 0);
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ioctl(0, KDSETMODE, KD_GRAPHICS);
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ioctl(0, VGLMode, 0);
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VGLCurWindow = 0;
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VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
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MAP_FILE | MAP_SHARED, 0, 0);
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/* XXX: what if mmap() has failed! */
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VGLDisplay->Type = VIDBUF8; /* XXX */
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switch (VGLModeInfo.vi_mem_model) {
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case V_INFO_MM_PLANAR:
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if (VGLModeInfo.vi_depth == 4 && VGLModeInfo.vi_planes == 4) {
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF4S;
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else
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VGLDisplay->Type = VIDBUF4;
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} else {
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/* shouldn't be happening */
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}
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break;
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case V_INFO_MM_PACKED:
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if (VGLModeInfo.vi_depth == 8) {
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF8S;
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else
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VGLDisplay->Type = VIDBUF8;
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}
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break;
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case V_INFO_MM_VGAX:
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VGLDisplay->Type = VIDBUF8X;
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break;
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case V_INFO_MM_DIRECT:
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switch (VGLModeInfo.vi_pixel_size) {
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case 2:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF16S;
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else
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VGLDisplay->Type = VIDBUF16;
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break;
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case 3:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF24S;
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else
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VGLDisplay->Type = VIDBUF24;
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break;
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case 4:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF32S;
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else
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VGLDisplay->Type = VIDBUF32;
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break;
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default:
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/* shouldn't be happening */
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break;
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}
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default:
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/* shouldn't be happening */
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break;
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}
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VGLDisplay->Bitmap = VGLMem;
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VGLDisplay->Xsize = VGLModeInfo.vi_width;
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VGLDisplay->Ysize = VGLModeInfo.vi_height;
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VGLSetVScreenSize(VGLDisplay, VGLDisplay->VXsize, VGLDisplay->VYsize);
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VGLPanScreen(VGLDisplay, VGLDisplay->Xorigin, VGLDisplay->Yorigin);
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switch (VGLDisplay->Type) {
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case VIDBUF4S:
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outb(0x3c6, 0xff);
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outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
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offset += len) {
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VGLSetSegment(offset);
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len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
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VGLAdpInfo.va_window_size);
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for (i = 0; i < VGLModeInfo.vi_planes; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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bcopy(&VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
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VGLMem, len);
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}
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}
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break;
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case VIDBUF4:
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case VIDBUF8X:
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outb(0x3c6, 0xff);
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outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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for (i = 0; i < VGLModeInfo.vi_planes; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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bcopy(&VGLBuf[i*VGLAdpInfo.va_window_size], VGLMem,
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VGLAdpInfo.va_window_size);
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}
|
|
break;
|
|
case VIDBUF8:
|
|
case VIDBUF8S:
|
|
case VIDBUF16:
|
|
case VIDBUF16S:
|
|
case VIDBUF24:
|
|
case VIDBUF24S:
|
|
case VIDBUF32:
|
|
case VIDBUF32S:
|
|
for (offset = 0; offset < VGLBufSize; offset += len) {
|
|
VGLSetSegment(offset);
|
|
len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
|
|
bcopy(&VGLBuf[offset], VGLMem, len);
|
|
}
|
|
break;
|
|
}
|
|
VGLRestorePalette();
|
|
ioctl(0, VT_RELDISP, VT_ACKACQ);
|
|
}
|
|
else {
|
|
switch (VGLDisplay->Type) {
|
|
case VIDBUF4S:
|
|
for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
|
|
offset += len) {
|
|
VGLSetSegment(offset);
|
|
len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
|
|
VGLAdpInfo.va_window_size);
|
|
for (i = 0; i < VGLModeInfo.vi_planes; i++) {
|
|
outb(0x3ce, 0x04);
|
|
outb(0x3cf, i);
|
|
bcopy(VGLMem, &VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
|
|
len);
|
|
}
|
|
}
|
|
break;
|
|
case VIDBUF4:
|
|
case VIDBUF8X:
|
|
/*
|
|
* NOTE: the saved buffer is NOT in the MEMBUF format which
|
|
* the ordinary memory bitmap object is stored in. XXX
|
|
*/
|
|
for (i = 0; i < VGLModeInfo.vi_planes; i++) {
|
|
outb(0x3ce, 0x04);
|
|
outb(0x3cf, i);
|
|
bcopy(VGLMem, &VGLBuf[i*VGLAdpInfo.va_window_size],
|
|
VGLAdpInfo.va_window_size);
|
|
}
|
|
break;
|
|
case VIDBUF8:
|
|
case VIDBUF8S:
|
|
case VIDBUF16:
|
|
case VIDBUF16S:
|
|
case VIDBUF24:
|
|
case VIDBUF24S:
|
|
case VIDBUF32:
|
|
case VIDBUF32S:
|
|
for (offset = 0; offset < VGLBufSize; offset += len) {
|
|
VGLSetSegment(offset);
|
|
len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
|
|
bcopy(VGLMem, &VGLBuf[offset], len);
|
|
}
|
|
break;
|
|
}
|
|
VGLMem = MAP_FAILED;
|
|
munmap(VGLDisplay->Bitmap, VGLAdpInfo.va_window_size);
|
|
ioctl(0, VGLOldMode, 0);
|
|
ioctl(0, KDSETMODE, KD_TEXT);
|
|
ioctl(0, KDDISABIO, 0);
|
|
ioctl(0, VT_RELDISP, VT_TRUE);
|
|
VGLDisplay->Bitmap = VGLBuf;
|
|
VGLDisplay->Type = MEMBUF;
|
|
VGLDisplay->Xsize = VGLDisplay->VXsize;
|
|
VGLDisplay->Ysize = VGLDisplay->VYsize;
|
|
while (!VGLOnDisplay) pause();
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
VGLSetSegment(unsigned int offset)
|
|
{
|
|
if (offset/VGLAdpInfo.va_window_size != VGLCurWindow) {
|
|
ioctl(0, CONS_SETWINORG, offset); /* FBIO_SETWINORG */
|
|
VGLCurWindow = offset/VGLAdpInfo.va_window_size;
|
|
}
|
|
return (offset%VGLAdpInfo.va_window_size);
|
|
}
|
|
|
|
int
|
|
VGLSetVScreenSize(VGLBitmap *object, int VXsize, int VYsize)
|
|
{
|
|
int depth;
|
|
|
|
if (VXsize < object->Xsize || VYsize < object->Ysize)
|
|
return -1;
|
|
if (object->Type == MEMBUF)
|
|
return -1;
|
|
if (ioctl(0, FBIO_SETLINEWIDTH, &VXsize))
|
|
return -1;
|
|
ioctl(0, CONS_ADPINFO, &VGLAdpInfo); /* FBIO_ADPINFO */
|
|
depth = VGLModeInfo.vi_depth;
|
|
if (depth == 15)
|
|
depth = 16;
|
|
object->VXsize = VGLAdpInfo.va_line_width
|
|
*8/(depth/VGLModeInfo.vi_planes);
|
|
object->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
|
|
if (VYsize < object->VYsize)
|
|
object->VYsize = VYsize;
|
|
|
|
#ifdef LIBVGL_DEBUG
|
|
fprintf(stderr, "new size: VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
|
|
object->Xsize, object->Ysize, object->VXsize, object->VYsize);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
VGLPanScreen(VGLBitmap *object, int x, int y)
|
|
{
|
|
video_display_start_t origin;
|
|
|
|
if (x < 0 || x + object->Xsize > object->VXsize
|
|
|| y < 0 || y + object->Ysize > object->VYsize)
|
|
return -1;
|
|
if (object->Type == MEMBUF)
|
|
return 0;
|
|
origin.x = x;
|
|
origin.y = y;
|
|
if (ioctl(0, FBIO_SETDISPSTART, &origin))
|
|
return -1;
|
|
object->Xorigin = x;
|
|
object->Yorigin = y;
|
|
|
|
#ifdef LIBVGL_DEBUG
|
|
fprintf(stderr, "new origin: (%d, %d)\n", x, y);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|