FreeBSD/Linux Kernel Cross Reference
sys/dev/vt/hw/efifb/efifb.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2014 The FreeBSD Foundation
      *
      * This software was developed by Aleksandr Rybalko under sponsorship from the
      * FreeBSD Foundation.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/fbio.h>
    #include <sys/linker.h>
    
    #include "opt_platform.h"
    
    #include <machine/metadata.h>
    #include <machine/vmparam.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <dev/vt/vt.h>
    #include <dev/vt/hw/fb/vt_fb.h>
    #include <dev/vt/colors/vt_termcolors.h>
    
    static vd_init_t vt_efifb_init;
    static vd_fini_t vt_efifb_fini;
    static vd_probe_t vt_efifb_probe;
    
    static struct vt_driver vt_efifb_driver = {
            .vd_name = "efifb",
            .vd_probe = vt_efifb_probe,
            .vd_init = vt_efifb_init,
            .vd_fini = vt_efifb_fini,
            .vd_blank = vt_fb_blank,
            .vd_bitblt_text = vt_fb_bitblt_text,
            .vd_invalidate_text = vt_fb_invalidate_text,
            .vd_bitblt_bmp = vt_fb_bitblt_bitmap,
            .vd_drawrect = vt_fb_drawrect,
            .vd_setpixel = vt_fb_setpixel,
            .vd_fb_ioctl = vt_fb_ioctl,
            .vd_fb_mmap = vt_fb_mmap,
            .vd_suspend = vt_suspend,
            .vd_resume = vt_resume,
            /* Better than VGA, but still generic driver. */
            .vd_priority = VD_PRIORITY_GENERIC + 1,
    };
    
    static struct fb_info local_info;
    VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver);
    
    static int
    vt_efifb_probe(struct vt_device *vd)
    {
            int             disabled;
            struct efi_fb   *efifb;
            caddr_t         kmdp;
    
            disabled = 0;
            TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
            if (disabled != 0)
                    return (CN_DEAD);
    
            kmdp = preload_search_by_type("elf kernel");
            if (kmdp == NULL)
                    kmdp = preload_search_by_type("elf64 kernel");
            efifb = (struct efi_fb *)preload_search_info(kmdp,
                MODINFO_METADATA | MODINFOMD_EFI_FB);
            if (efifb == NULL)
                    return (CN_DEAD);
    
            return (CN_INTERNAL);
    }
    
   static int
   vt_efifb_init(struct vt_device *vd)
   {
           struct fb_info  *info;
           struct efi_fb   *efifb;
           caddr_t         kmdp;
           int             roff, goff, boff;
   
           info = vd->vd_softc;
           if (info == NULL)
                   info = vd->vd_softc = (void *)&local_info;
   
           kmdp = preload_search_by_type("elf kernel");
           if (kmdp == NULL)
                   kmdp = preload_search_by_type("elf64 kernel");
           efifb = (struct efi_fb *)preload_search_info(kmdp,
               MODINFO_METADATA | MODINFOMD_EFI_FB);
           if (efifb == NULL)
                   return (CN_DEAD);
   
           info->fb_type = FBTYPE_EFIFB;
           info->fb_height = efifb->fb_height;
           info->fb_width = efifb->fb_width;
   
           info->fb_depth = fls(efifb->fb_mask_red | efifb->fb_mask_green |
               efifb->fb_mask_blue | efifb->fb_mask_reserved);
           /* Round to a multiple of the bits in a byte. */
           info->fb_bpp = roundup2(info->fb_depth, NBBY);
   
           /* Stride in bytes, not pixels */
           info->fb_stride = efifb->fb_stride * (info->fb_bpp / NBBY);
   
           roff = ffs(efifb->fb_mask_red) - 1;
           goff = ffs(efifb->fb_mask_green) - 1;
           boff = ffs(efifb->fb_mask_blue) - 1;
           vt_config_cons_colors(info, COLOR_FORMAT_RGB,
               efifb->fb_mask_red >> roff, roff,
               efifb->fb_mask_green >> goff, goff,
               efifb->fb_mask_blue >> boff, boff);
           info->fb_cmsize = NCOLORS;
   
           info->fb_size = info->fb_height * info->fb_stride;
           info->fb_pbase = efifb->fb_addr;
           info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase,
               info->fb_size, VM_MEMATTR_WRITE_COMBINING);
   
           vt_fb_init(vd);
   
           return (CN_INTERNAL);
   }
   
   static void
   vt_efifb_fini(struct vt_device *vd, void *softc)
   {
           struct fb_info  *info = softc;
   
           vt_fb_fini(vd, softc);
           pmap_unmapdev((void *)info->fb_vbase, info->fb_size);
   }

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