efifb.c revision 269620
1191783Srmacklem/*- 2191783Srmacklem * Copyright (c) 2014 The FreeBSD Foundation 3191783Srmacklem * All rights reserved. 4191783Srmacklem * 5191783Srmacklem * This software was developed by Aleksandr Rybalko under sponsorship from the 6191783Srmacklem * FreeBSD Foundation. 7191783Srmacklem * 8191783Srmacklem * Redistribution and use in source and binary forms, with or without 9191783Srmacklem * modification, are permitted provided that the following conditions 10191783Srmacklem * are met: 11191783Srmacklem * 1. Redistributions of source code must retain the above copyright 12191783Srmacklem * notice, this list of conditions and the following disclaimer. 13191783Srmacklem * 2. Redistributions in binary form must reproduce the above copyright 14191783Srmacklem * notice, this list of conditions and the following disclaimer in the 15191783Srmacklem * documentation and/or other materials provided with the distribution. 16191783Srmacklem * 17191783Srmacklem * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18191783Srmacklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19191783Srmacklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20191783Srmacklem * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21191783Srmacklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22191783Srmacklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23191783Srmacklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24191783Srmacklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25191783Srmacklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26191783Srmacklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27191783Srmacklem * SUCH DAMAGE. 28191783Srmacklem * 29191783Srmacklem * $FreeBSD: head/sys/dev/vt/hw/efifb/efifb.c 269620 2014-08-06 00:35:48Z nwhitehorn $ 30191783Srmacklem */ 31191783Srmacklem 32191783Srmacklem#include <sys/cdefs.h> 33191783Srmacklem__FBSDID("$FreeBSD: head/sys/dev/vt/hw/efifb/efifb.c 269620 2014-08-06 00:35:48Z nwhitehorn $"); 34191783Srmacklem 35191783Srmacklem#include <sys/param.h> 36191783Srmacklem#include <sys/systm.h> 37191783Srmacklem#include <sys/kernel.h> 38191783Srmacklem#include <sys/fbio.h> 39191783Srmacklem#include <sys/linker.h> 40191783Srmacklem 41191783Srmacklem#include "opt_platform.h" 42221523Smav 43191783Srmacklem#include <machine/metadata.h> 44191783Srmacklem#include <machine/vm.h> 45191783Srmacklem#include <machine/vmparam.h> 46191783Srmacklem#include <vm/vm.h> 47191783Srmacklem#include <vm/pmap.h> 48191783Srmacklem#include <machine/pmap.h> 49191783Srmacklem 50191783Srmacklem#include <dev/vt/vt.h> 51191783Srmacklem#include <dev/vt/hw/fb/vt_fb.h> 52191783Srmacklem#include <dev/vt/colors/vt_termcolors.h> 53191783Srmacklem 54191783Srmacklemstatic vd_init_t vt_efifb_init; 55191783Srmacklemstatic vd_probe_t vt_efifb_probe; 56191783Srmacklemstatic void vt_efifb_remap(void *efifb_data); 57191783Srmacklem 58191783Srmacklemstatic struct vt_driver vt_efifb_driver = { 59220739Srmacklem .vd_name = "efifb", 60191783Srmacklem .vd_probe = vt_efifb_probe, 61191783Srmacklem .vd_init = vt_efifb_init, 62191783Srmacklem .vd_blank = vt_fb_blank, 63191783Srmacklem .vd_bitbltchr = vt_fb_bitbltchr, 64191783Srmacklem .vd_maskbitbltchr = vt_fb_maskbitbltchr, 65191783Srmacklem .vd_fb_ioctl = vt_fb_ioctl, 66191783Srmacklem .vd_fb_mmap = vt_fb_mmap, 67191783Srmacklem /* Better than VGA, but still generic driver. */ 68191783Srmacklem .vd_priority = VD_PRIORITY_GENERIC + 1, 69191783Srmacklem}; 70191783Srmacklem 71191783Srmacklemstatic struct fb_info local_info; 72191783SrmacklemVT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); 73191783Srmacklem 74220683SrmacklemSYSINIT(efifb_remap, SI_SUB_KMEM, SI_ORDER_ANY, vt_efifb_remap, &local_info); 75220683Srmacklem 76220683Srmacklemstatic int 77191783Srmacklemvt_efifb_probe(struct vt_device *vd) 78191783Srmacklem{ 79191783Srmacklem int disabled; 80191783Srmacklem struct efi_fb *efifb; 81191783Srmacklem caddr_t kmdp; 82191783Srmacklem 83191783Srmacklem disabled = 0; 84191783Srmacklem TUNABLE_INT_FETCH("hw.syscons.disable", &disabled); 85191783Srmacklem if (disabled != 0) 86191783Srmacklem return (CN_DEAD); 87191783Srmacklem 88191783Srmacklem kmdp = preload_search_by_type("elf kernel"); 89191783Srmacklem if (kmdp == NULL) 90191783Srmacklem kmdp = preload_search_by_type("elf64 kernel"); 91191783Srmacklem efifb = (struct efi_fb *)preload_search_info(kmdp, 92191783Srmacklem MODINFO_METADATA | MODINFOMD_EFI_FB); 93191783Srmacklem if (efifb == NULL) 94191783Srmacklem return (CN_DEAD); 95191783Srmacklem 96191783Srmacklem return (CN_INTERNAL); 97191783Srmacklem} 98191783Srmacklem 99191783Srmacklemstatic int 100191783Srmacklemvt_efifb_init(struct vt_device *vd) 101191783Srmacklem{ 102191783Srmacklem int depth, d; 103191783Srmacklem struct fb_info *info; 104191783Srmacklem struct efi_fb *efifb; 105191783Srmacklem caddr_t kmdp; 106191783Srmacklem 107191783Srmacklem info = vd->vd_softc; 108191783Srmacklem if (info == NULL) 109191783Srmacklem info = vd->vd_softc = (void *)&local_info; 110191783Srmacklem 111191783Srmacklem kmdp = preload_search_by_type("elf kernel"); 112191783Srmacklem if (kmdp == NULL) 113191783Srmacklem kmdp = preload_search_by_type("elf64 kernel"); 114191783Srmacklem efifb = (struct efi_fb *)preload_search_info(kmdp, 115191783Srmacklem MODINFO_METADATA | MODINFOMD_EFI_FB); 116191783Srmacklem if (efifb == NULL) 117191783Srmacklem return (CN_DEAD); 118191783Srmacklem 119191783Srmacklem info->fb_height = efifb->fb_height; 120191783Srmacklem info->fb_width = efifb->fb_width; 121191783Srmacklem 122191783Srmacklem depth = fls(efifb->fb_mask_red); 123191783Srmacklem d = fls(efifb->fb_mask_green); 124191783Srmacklem depth = d > depth ? d : depth; 125191783Srmacklem d = fls(efifb->fb_mask_blue); 126191783Srmacklem depth = d > depth ? d : depth; 127191783Srmacklem d = fls(efifb->fb_mask_reserved); 128191783Srmacklem depth = d > depth ? d : depth; 129191783Srmacklem info->fb_depth = depth; 130191783Srmacklem 131191783Srmacklem info->fb_stride = efifb->fb_stride * (depth / 8); 132191783Srmacklem 133191783Srmacklem vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 134191783Srmacklem efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1, 135191783Srmacklem efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1, 136191783Srmacklem efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1); 137191783Srmacklem 138191783Srmacklem info->fb_size = info->fb_height * info->fb_stride; 139191783Srmacklem info->fb_pbase = efifb->fb_addr; 140191783Srmacklem /* 141191783Srmacklem * Use the direct map as a crutch until pmap is available. Once pmap 142191783Srmacklem * is online, the framebuffer will be remapped by vt_efifb_remap() 143191783Srmacklem * using pmap_mapdev_attr(). 144191783Srmacklem */ 145191783Srmacklem info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); 146191783Srmacklem 147191783Srmacklem /* Get pixel storage size. */ 148191783Srmacklem info->fb_bpp = info->fb_stride / info->fb_width * 8; 149191783Srmacklem 150191783Srmacklem /* 151191783Srmacklem * Early FB driver work with static window buffer, so reduce to minimal 152191783Srmacklem * size, buffer or screen. 153191783Srmacklem */ 154191783Srmacklem info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH); 155191783Srmacklem info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT); 156191783Srmacklem 157191783Srmacklem vt_fb_init(vd); 158191783Srmacklem 159191783Srmacklem return (CN_INTERNAL); 160191783Srmacklem} 161191783Srmacklem 162192000Srmacklemstatic void 163191783Srmacklemvt_efifb_remap(void *xinfo) 164191783Srmacklem{ 165191783Srmacklem struct fb_info *info = xinfo; 166191783Srmacklem 167191783Srmacklem if (info->fb_pbase == 0) 168191783Srmacklem return; 169191783Srmacklem 170191783Srmacklem /* 171191783Srmacklem * Remap as write-combining. This massively improves performance and 172191783Srmacklem * happens very early in kernel initialization, when everything is 173191783Srmacklem * still single-threaded and interrupts are off, so replacing the 174191783Srmacklem * mapping address is safe. 175191783Srmacklem */ 176191783Srmacklem info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase, 177191783Srmacklem info->fb_size, VM_MEMATTR_WRITE_COMBINING); 178191783Srmacklem} 179191783Srmacklem 180191783Srmacklem