1 /*- 2 * Copyright (c) 2014 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Aleksandr Rybalko under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/fbio.h> 39 #include <sys/linker.h> 40 41 #include "opt_platform.h" 42 43 #include <machine/metadata.h> 44 #include <machine/vm.h> 45 #include <machine/vmparam.h> 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 #include <machine/pmap.h> 49 50 #include <dev/vt/vt.h> 51 #include <dev/vt/hw/fb/vt_fb.h> 52 #include <dev/vt/colors/vt_termcolors.h> 53 54 static vd_init_t vt_efifb_init; 55 static vd_probe_t vt_efifb_probe; 56 static void vt_efifb_remap(void *efifb_data); 57 58 static struct vt_driver vt_efifb_driver = { 59 .vd_name = "efifb", 60 .vd_probe = vt_efifb_probe, 61 .vd_init = vt_efifb_init, 62 .vd_blank = vt_fb_blank, 63 .vd_bitbltchr = vt_fb_bitbltchr, 64 .vd_maskbitbltchr = vt_fb_maskbitbltchr, 65 .vd_fb_ioctl = vt_fb_ioctl, 66 .vd_fb_mmap = vt_fb_mmap, 67 /* Better than VGA, but still generic driver. */ 68 .vd_priority = VD_PRIORITY_GENERIC + 1, 69 }; 70 71 static struct fb_info local_info; 72 VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); 73 74 SYSINIT(efifb_remap, SI_SUB_KMEM, SI_ORDER_ANY, vt_efifb_remap, &local_info); 75 76 static int 77 vt_efifb_probe(struct vt_device *vd) 78 { 79 int disabled; 80 struct efi_fb *efifb; 81 caddr_t kmdp; 82 83 disabled = 0; 84 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled); 85 if (disabled != 0) 86 return (CN_DEAD); 87 88 kmdp = preload_search_by_type("elf kernel"); 89 if (kmdp == NULL) 90 kmdp = preload_search_by_type("elf64 kernel"); 91 efifb = (struct efi_fb *)preload_search_info(kmdp, 92 MODINFO_METADATA | MODINFOMD_EFI_FB); 93 if (efifb == NULL) 94 return (CN_DEAD); 95 96 return (CN_INTERNAL); 97 } 98 99 static int 100 vt_efifb_init(struct vt_device *vd) 101 { 102 int depth, d; 103 struct fb_info *info; 104 struct efi_fb *efifb; 105 caddr_t kmdp; 106 107 info = vd->vd_softc; 108 if (info == NULL) 109 info = vd->vd_softc = (void *)&local_info; 110 111 kmdp = preload_search_by_type("elf kernel"); 112 if (kmdp == NULL) 113 kmdp = preload_search_by_type("elf64 kernel"); 114 efifb = (struct efi_fb *)preload_search_info(kmdp, 115 MODINFO_METADATA | MODINFOMD_EFI_FB); 116 if (efifb == NULL) 117 return (CN_DEAD); 118 119 info->fb_height = efifb->fb_height; 120 info->fb_width = efifb->fb_width; 121 122 depth = fls(efifb->fb_mask_red); 123 d = fls(efifb->fb_mask_green); 124 depth = d > depth ? d : depth; 125 d = fls(efifb->fb_mask_blue); 126 depth = d > depth ? d : depth; 127 d = fls(efifb->fb_mask_reserved); 128 depth = d > depth ? d : depth; 129 info->fb_depth = depth; 130 131 info->fb_stride = efifb->fb_stride * (depth / 8); 132 133 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB, 134 efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1, 135 efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1, 136 efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1); 137 138 info->fb_size = info->fb_height * info->fb_stride; 139 info->fb_pbase = efifb->fb_addr; 140 /* 141 * Use the direct map as a crutch until pmap is available. Once pmap 142 * is online, the framebuffer will be remapped by vt_efifb_remap() 143 * using pmap_mapdev_attr(). 144 */ 145 info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); 146 147 /* Get pixel storage size. */ 148 info->fb_bpp = info->fb_stride / info->fb_width * 8; 149 150 /* 151 * Early FB driver work with static window buffer, so reduce to minimal 152 * size, buffer or screen. 153 */ 154 info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH); 155 info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT); 156 157 fb_probe(info); 158 vt_fb_init(vd); 159 160 /* Clear the screen. */ 161 vt_fb_blank(vd, TC_BLACK); 162 163 return (CN_INTERNAL); 164 } 165 166 static void 167 vt_efifb_remap(void *xinfo) 168 { 169 struct fb_info *info = xinfo; 170 171 if (info->fb_pbase == 0) 172 return; 173 174 /* 175 * Remap as write-combining. This massively improves performance and 176 * happens very early in kernel initialization, when everything is 177 * still single-threaded and interrupts are off, so replacing the 178 * mapping address is safe. 179 */ 180 info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase, 181 info->fb_size, VM_MEMATTR_WRITE_COMBINING); 182 } 183 184