1/* $NetBSD: nouveau_nvkm_subdev_bios_npde.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */ 2 3/* 4 * Copyright 2014 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs <bskeggs@redhat.com> 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_npde.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $"); 28 29#include <subdev/bios.h> 30#include <subdev/bios/npde.h> 31#include <subdev/bios/pcir.h> 32 33u32 34nvbios_npdeTe(struct nvkm_bios *bios, u32 base) 35{ 36 struct nvbios_pcirT pcir; 37 u8 ver; u16 hdr; 38 u32 data = nvbios_pcirTp(bios, base, &ver, &hdr, &pcir); 39 if (data = (data + hdr + 0x0f) & ~0x0f, data) { 40 switch (nvbios_rd32(bios, data + 0x00)) { 41 case 0x4544504e: /* NPDE */ 42 break; 43 default: 44 nvkm_debug(&bios->subdev, 45 "%08x: NPDE signature (%08x) unknown\n", 46 data, nvbios_rd32(bios, data + 0x00)); 47 data = 0; 48 break; 49 } 50 } 51 return data; 52} 53 54u32 55nvbios_npdeTp(struct nvkm_bios *bios, u32 base, struct nvbios_npdeT *info) 56{ 57 u32 data = nvbios_npdeTe(bios, base); 58 memset(info, 0x00, sizeof(*info)); 59 if (data) { 60 info->image_size = nvbios_rd16(bios, data + 0x08) * 512; 61 info->last = nvbios_rd08(bios, data + 0x0a) & 0x80; 62 } 63 return data; 64} 65