diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c new file mode 100644 index 000000000000..e95b69faa82e --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c @@ -0,0 +1,111 @@ +/* + * Copyright 2012 Nouveau Community + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Martin Peres + */ +#include <subdev/bios.h> +#include <subdev/bios/bit.h> +#include <subdev/bios/vmap.h> + +u16 +nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + struct bit_entry bit_P; + u16 vmap = 0x0000; + + if (!bit_entry(bios, 'P', &bit_P)) { + if (bit_P.version == 2) { + vmap = nv_ro16(bios, bit_P.offset + 0x20); + if (vmap) { + *ver = nv_ro08(bios, vmap + 0); + switch (*ver) { + case 0x10: + case 0x20: + *hdr = nv_ro08(bios, vmap + 1); + *cnt = nv_ro08(bios, vmap + 3); + *len = nv_ro08(bios, vmap + 2); + return vmap; + default: + break; + } + } + } + } + + return 0x0000; +} + +u16 +nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, + struct nvbios_vmap *info) +{ + u16 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len); + memset(info, 0x00, sizeof(*info)); + switch (!!vmap * *ver) { + case 0x10: + case 0x20: + break; + } + return vmap; +} + +u16 +nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) +{ + u8 hdr, cnt; + u16 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len); + if (vmap && idx < cnt) { + vmap = vmap + hdr + (idx * *len); + return vmap; + } + return 0x0000; +} + +u16 +nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, + struct nvbios_vmap_entry *info) +{ + u16 vmap = nvbios_vmap_entry(bios, idx, ver, len); + memset(info, 0x00, sizeof(*info)); + switch (!!vmap * *ver) { + case 0x10: + info->link = 0xff; + info->min = nv_ro32(bios, vmap + 0x00); + info->max = nv_ro32(bios, vmap + 0x04); + info->arg[0] = nv_ro32(bios, vmap + 0x08); + info->arg[1] = nv_ro32(bios, vmap + 0x0c); + info->arg[2] = nv_ro32(bios, vmap + 0x10); + break; + case 0x20: + info->unk0 = nv_ro08(bios, vmap + 0x00); + info->link = nv_ro08(bios, vmap + 0x01); + info->min = nv_ro32(bios, vmap + 0x02); + info->max = nv_ro32(bios, vmap + 0x06); + info->arg[0] = nv_ro32(bios, vmap + 0x0a); + info->arg[1] = nv_ro32(bios, vmap + 0x0e); + info->arg[2] = nv_ro32(bios, vmap + 0x12); + info->arg[3] = nv_ro32(bios, vmap + 0x16); + info->arg[4] = nv_ro32(bios, vmap + 0x1a); + info->arg[5] = nv_ro32(bios, vmap + 0x1e); + break; + } + return vmap; +} |