subdev/bios/image.c

0001 /*
0002  * Copyright 2014 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs <bskeggs@redhat.com>
0023  */
0024 #include <subdev/bios.h>
0025 #include <subdev/bios/image.h>
0026 #include <subdev/bios/pcir.h>
0027 #include <subdev/bios/npde.h>
0028
0029 static bool
0030 nvbios_imagen(struct nvkm_bios *bios, struct nvbios_image *image)
0031 {
0032     struct nvkm_subdev *subdev = &bios->subdev;
0033     struct nvbios_pcirT pcir;
0034     struct nvbios_npdeT npde;
0035     u8  ver;
0036     u16 hdr;
0037     u32 data;
0038
0039     switch ((data = nvbios_rd16(bios, image->base + 0x00))) {
0040     case 0xaa55:
0041     case 0xbb77:
0042     case 0x4e56: /* NV */
0043         break;
0044     default:
0045         nvkm_debug(subdev, "%08x: ROM signature (%04x) unknown\n",
0046                image->base, data);
0047         return false;
0048     }
0049
0050     if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir)))
0051         return false;
0052     image->size = pcir.image_size;
0053     image->type = pcir.image_type;
0054     image->last = pcir.last;
0055
0056     if (image->type != 0x70) {
0057         if (!(data = nvbios_npdeTp(bios, image->base, &npde)))
0058             return true;
0059         image->size = npde.image_size;
0060         image->last = npde.last;
0061     } else {
0062         image->last = true;
0063     }
0064
0065     return true;
0066 }
0067
0068 bool
0069 nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image)
0070 {
0071     u32 imaged_addr = bios->imaged_addr;
0072     memset(image, 0x00, sizeof(*image));
0073     bios->imaged_addr = 0;
0074     do {
0075         image->base += image->size;
0076         if (image->last || !nvbios_imagen(bios, image)) {
0077             bios->imaged_addr = imaged_addr;
0078             return false;
0079         }
0080     } while(idx--);
0081     bios->imaged_addr = imaged_addr;
0082     return true;
0083 }