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_bitblt_text = vt_fb_bitblt_text, 64 .vd_bitblt_bmp = vt_fb_bitblt_bitmap, 65 .vd_drawrect = vt_fb_drawrect, 66 .vd_setpixel = vt_fb_setpixel, 67 .vd_fb_ioctl = vt_fb_ioctl, 68 .vd_fb_mmap = vt_fb_mmap, 69 /* Better than VGA, but still generic driver. */ 70 .vd_priority = VD_PRIORITY_GENERIC + 1, 71 }; 72 73 static struct fb_info local_info; 74 VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); 75 76 SYSINIT(efifb_remap, SI_SUB_KMEM, SI_ORDER_ANY, vt_efifb_remap, &local_info); 77 78 static int 79 vt_efifb_probe(struct vt_device *vd) 80 { 81 int disabled; 82 struct efi_fb *efifb; 83 caddr_t kmdp; 84 85 disabled = 0; 86 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled); 87 if (disabled != 0) 88 return (CN_DEAD); 89 90 kmdp = preload_search_by_type("elf kernel"); 91 if (kmdp == NULL) 92 kmdp = preload_search_by_type("elf64 kernel"); 93 efifb = (struct efi_fb *)preload_search_info(kmdp, 94 MODINFO_METADATA | MODINFOMD_EFI_FB); 95 if (efifb == NULL) 96 return (CN_DEAD); 97 98 return (CN_INTERNAL); 99 } 100 101 static int 102 vt_efifb_init(struct vt_device *vd) 103 { 104 int depth, d; 105 struct fb_info *info; 106 struct efi_fb *efifb; 107 caddr_t kmdp; 108 109 info = vd->vd_softc; 110 if (info == NULL) 111 info = vd->vd_softc = (void *)&local_info; 112 113 kmdp = preload_search_by_type("elf kernel"); 114 if (kmdp == NULL) 115 kmdp = preload_search_by_type("elf64 kernel"); 116 efifb = (struct efi_fb *)preload_search_info(kmdp, 117 MODINFO_METADATA | MODINFOMD_EFI_FB); 118 if (efifb == NULL) 119 return (CN_DEAD); 120 121 info->fb_height = efifb->fb_height; 122 info->fb_width = efifb->fb_width; 123 124 depth = fls(efifb->fb_mask_red); 125 d = fls(efifb->fb_mask_green); 126 depth = d > depth ? d : depth; 127 d = fls(efifb->fb_mask_blue); 128 depth = d > depth ? d : depth; 129 d = fls(efifb->fb_mask_reserved); 130 depth = d > depth ? d : depth; 131 info->fb_depth = depth; 132 133 info->fb_stride = efifb->fb_stride * (depth / 8); 134 135 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB, 136 efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1, 137 efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1, 138 efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1); 139 140 info->fb_size = info->fb_height * info->fb_stride; 141 info->fb_pbase = efifb->fb_addr; 142 /* 143 * Use the direct map as a crutch until pmap is available. Once pmap 144 * is online, the framebuffer will be remapped by vt_efifb_remap() 145 * using pmap_mapdev_attr(). 146 */ 147 info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); 148 149 /* Get pixel storage size. */ 150 info->fb_bpp = info->fb_stride / info->fb_width * 8; 151 152 /* 153 * Early FB driver work with static window buffer, so reduce to minimal 154 * size, buffer or screen. 155 */ 156 info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH); 157 info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT); 158 159 vt_fb_init(vd); 160 161 return (CN_INTERNAL); 162 } 163 164 static void 165 vt_efifb_remap(void *xinfo) 166 { 167 struct fb_info *info = xinfo; 168 169 if (info->fb_pbase == 0) 170 return; 171 172 /* 173 * Remap as write-combining. This massively improves performance and 174 * happens very early in kernel initialization, when everything is 175 * still single-threaded and interrupts are off, so replacing the 176 * mapping address is safe. 177 */ 178 info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase, 179 info->fb_size, VM_MEMATTR_WRITE_COMBINING); 180 } 181 182