オープンソース開発と、 あるフレームバッファコンソールの話 ~名古屋応用編~
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この資料は、 OSC名古屋 2015で青山さんが発表された Using “C-bus” extension boards on LUNA-88K2 (at OSC 2015 Nagoya) に対抗して作られました。 よって、事前に青山さんのスライドを一読しておくと、より楽しめる内容に なっているよーな、なっていないよーな感じです… (↓青山さんのスライドはこちら！) http://www.slideshare.net/ao_kenji/osc2015-nagoya/
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オープンソース開発と、 あるフレームバッファコンソールの話 ~名古屋応用編~
- 2. おやくそく この資料は、 OSC名古屋 2015で青山さんが発表された Using “C-bus” extension boards on LUNA-88K2 (at OSC 2015 Nagoya) に対抗して作られました。 よって、事前に青山さんのスライドを一読しておくと、より楽しめる内容に なっているよーな、なっていないよーな感じです… (↓青山さんのスライドはこちら！) http://www.slideshare.net/ao_kenji/osc2015-nagoya/
- 3. 家にこんな本が有りまして
- 4. あっ
- 11. OpenLDI
- 13. NetBSD Advent Calendar 2014 話は変わって…
- 15. ドライバを書く事に味を占める
- 17. AlphaのX？ /src/share/mk/bsd.own.mk # # Do we default to XFree86 or Xorg for this platform? # .if ${MACHINE} == "acorn32" || ${MACHINE} == "alpha" || ${MACHINE} == "amiga" || ${MACHINE} == "mac68k" || ${MACHINE} == "pmax" || ${MACHINE} == "sun3" X11FLAVOUR?= XFree86 .else X11FLAVOUR?= Xorg .endif NetBSD/luna68Kですら、Xorgなのに... NetBSD/AlphaはXFree86…
- 18. AlphaのX？ # startx auth: creating new authority file /root/.Xauthority xauth: (argv):1: bad display name ":0" in "list" command xauth: creating new authority file /root/.Xauthority xauth: (stdin):1: bad display name ":0" in "add" command xauth: creating new authority file /root/.Xauthority xauth: (argv):1: bad display name ":0" in "list" command xauth: creating new authority file /root/.Xauthority xauth: (stdin):1: bad display name ":0" in "add" command unable to get frame buffer info: Inappropriate ioctl for device Fatal server error: no screens found X connection to :0.0 broken (explicit kill or server shutdown). xauth: creating new authority file /root/.Xauthority xauth: (argv):1: bad display name ":0" in "remove" command xauth: (argv):1: bad display name ":0" in "remove" command # ls -l X lrwxr-xr-x 1 root wheel 25 May 16 2015 X -> /usr/X11R6/bin/XdecNetBSD
- 20. ドライバ書いた！
- 22. 何故表示が崩れるのか？
- 25. Appian Graphics /* * Copyright 2000-2001 by Sven Luther <luther (at) dpt-info.u-strasbg.fr>. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Sven Luther not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Sven Luther makes no representations * about the suitability of this software for any purpose. It is provided * "as is" without express or implied warranty. * * SVEN LUTHER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL SVEN LUTHER BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. * * Authors: Sven Luther, <luther (at) dpt-info.u-strasbg.fr> * Alan Hourihane, <alanh (at) fairlite.demon.co.uk> * * this work is sponsored by Appian Graphics. * * Permedia 3 accelerated options. */ /xfree/xc/programs/Xserver/hw/xfree86/drivers/glint/pm3_accel.c XのPermedia3ドライバのスポンサー！
- 27. 何故表示が崩れるのか？ /* * Some Power Mac G4 model could not initialize these registers, * Power Mac G4 (Mirrored Drive Doors), for example */ #if defined(__powerpc__) bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_LOCALMEMCAPS, 0x02e311B8); bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_LOCALMEMTIMINGS, 0x07424905); bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_LOCALMEMCONTROL, 0x0c000003); #endif My Power Mac G4 Mirrored Drive Doors could not initialize these registers. (Display gets corrupted.) レジスタを規定値で初期化したらうまくいきました！
- 28. 64MBの罠 /* * Permedia 3 always return 64MB fbsize * 16 MB should be enough -- more just wastes map entries */ if (sc->sc_fbsize != 0) sc->sc_fbsize = (16 << 20); Permedia 3 always return 64MB frame buffer size. The minimum frame buffer size is 16MB in Permedia 3 product lines. I don't write frame buffer size check routine. I think that's enough. グラフィックメモリの容量を聞くと、 実際は16MBだったり、32MBだったりしても、 常に64MBと返してくる… そこで製品ラインナップ最低の16MBを設定してみる
- 29. 64MBの罠 Xではグラフィックメモリを読み書きして、 実際の容量を割り出しています、が、 8bppのフレームバッファコンソールで こんな複雑な処理が必要か？と思いました ↓ 製品ラインの最低限の16MB設定しとこ！ ↓ pm3fb0: 16 MB aperture at 0x84000000 ↓ 16MBの表示いらないんじゃ←ｲﾏｺｺ (処理を書くのがメンドクサかった訳ではない) xfree86/drivers/glint/pm3_dac.c
- 30. static void pm3fb_cfbX_putc(struct vc_data *conp, struct display *p, int c, int yy, int xx) PM3_WRITE_REG(PM3AreaStippleMode, (o_x << 7) | (o_y << 12) | /* x_offset, y_offset in pattern */ (1 << 18) | /* BE */ 1 | (asx << 1) | (asy << 4) | /* address select x/y */ (1 << 20)); /* OpaqueSpan */ if (fontwidth(p) <= 8) { cdat = p->fontdata + (c & p->charmask) * fontheight(p); } else { cdat = p->fontdata + ((c & p->charmask) * (fontheight(p) << 1)); } PM3_WAIT(2 + fontheight(p)); for (i = 0; i < fontheight(p); i++) { /* assume fontheight <= 32 */ if (fontwidth(p) <= 8) { ldat = *cdat++; } else { /* assume fontwidth <= 16 ATM */ ldat = ((*cdat++) << 8); ldat |= *cdat++; } PM3_WRITE_REG(AreaStipplePattern_indexed(i), ldat); } フォント？ linux/drivers/video/pm3fb.c Linuxでは AreaStippleModeで描画
- 31. フォント？ static void pm3fb_putchar(void *cookie, int row, int col, u_int c, long attr) bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_RASTERIZER_MODE, mode); … bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_SCISSORMINXY, ((y & 0x0fff) << 16) | (x & 0x0fff)); bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_SCISSORMAXXY, (((y + he) & 0x0fff) << 16) | ((x + wi) & 0x0fff)); bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_RECTANGLEPOSITION, (((y) & 0xffff)<<16) | ((x) & 0xffff)); … pm3fb_wait(sc, he); switch (ri->ri_font->stride) { case 1: { uint8_t *data8 = data; uint32_t reg; for (i = 0; i < he; i++) { reg = *data8; bus_space_write_4(sc->sc_memt, sc->sc_regh, PM3_BITMASKPATTERN, reg); data8++; } break; } NetBSDでは RASTERIZER_MODEで描画
- 32. フォントの描画が違うのだよ！
- 33. 著作権？
- 35. 著作権？ 書き直し
- 37. The NetBSD source code style guide. /src/share/misc/style OpenBSDにもあるそうです！ (青山さん談)
- 38. manの書き方 .Dd January 1, 2015 .Dt PM3FB 4 .Os .Sh NAME .Nm pm3fb .Nd 3Dlabs Permedia 3 / Oxygen VX1 / Proformance 3 framebuffer driver .Sh SYNOPSIS .Cd "pm3fb* at pci?" .Cd "wsdisplay* at pm3fb?" .Sh DESCRIPTION The .Nm driver provides support for the 3Dlabs Permedia 3 / Oxygen VX1 / Proformance 3 series of graphics cards and provides an interface for machine independent .Xr wscons 4 driver. .Pp Currently コピって作っていたが直感的でない… ちょっと書いてbuild.sh -releaseで確認 効率が悪い
- 40. manの書き方 PM3FB(4) Kernel Interfaces Manual PM3FB(4) NAME pm3fb -- 3Dlabs Permedia 3 / Oxygen VX1 / Proformance 3 framebuffer driver SYNOPSIS pm3fb* at pci? wsdisplay* at pm3fb? DESCRIPTION The pm3fb driver provides support for the 3Dlabs Permedia 3 / Oxygen VX1 / Proformance 3 series of graphics cards and provides an interface for machine independent wscons(4) driver. Currently pm3fb does not support Anti-alias font rendering and OpenLDI video interface. However, it is capable of changing the resolution and uses DDC2 to pick an appropriate video mode. A 2D graphics engine is used to accelerate scrolling, rectangle fills and Bitmap font rendering. SEE ALSO pci(4), wscons(4), wsdisplay(4)
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