cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hdmigk104.c (3295B)

      1/*
      2 * Copyright 2014 Red Hat Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: Ben Skeggs
     23 */
     24#include "hdmi.h"
     25
     26void
     27gk104_hdmi_ctrl(struct nvkm_ior *ior, int head, bool enable, u8 max_ac_packet,
     28		u8 rekey, u8 *avi, u8 avi_size, u8 *vendor, u8 vendor_size)
     29{
     30	struct nvkm_device *device = ior->disp->engine.subdev.device;
     31	const u32 ctrl = 0x40000000 * enable |
     32			 max_ac_packet << 16 |
     33			 rekey;
     34	const u32 hoff = head * 0x800;
     35	const u32 hdmi = head * 0x400;
     36	struct packed_hdmi_infoframe avi_infoframe;
     37	struct packed_hdmi_infoframe vendor_infoframe;
     38
     39	pack_hdmi_infoframe(&avi_infoframe, avi, avi_size);
     40	pack_hdmi_infoframe(&vendor_infoframe, vendor, vendor_size);
     41
     42	if (!(ctrl & 0x40000000)) {
     43		nvkm_mask(device, 0x616798 + hoff, 0x40000000, 0x00000000);
     44		nvkm_mask(device, 0x690100 + hdmi, 0x00000001, 0x00000000);
     45		nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000000);
     46		nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000000);
     47		return;
     48	}
     49
     50	/* AVI InfoFrame */
     51	nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000000);
     52	if (avi_size) {
     53		nvkm_wr32(device, 0x690008 + hdmi, avi_infoframe.header);
     54		nvkm_wr32(device, 0x69000c + hdmi, avi_infoframe.subpack0_low);
     55		nvkm_wr32(device, 0x690010 + hdmi, avi_infoframe.subpack0_high);
     56		nvkm_wr32(device, 0x690014 + hdmi, avi_infoframe.subpack1_low);
     57		nvkm_wr32(device, 0x690018 + hdmi, avi_infoframe.subpack1_high);
     58		nvkm_mask(device, 0x690000 + hdmi, 0x00000001, 0x00000001);
     59	}
     60
     61	/* GENERIC(?) / Vendor InfoFrame? */
     62	nvkm_mask(device, 0x690100 + hdmi, 0x00010001, 0x00000000);
     63	if (vendor_size) {
     64		nvkm_wr32(device, 0x690108 + hdmi, vendor_infoframe.header);
     65		nvkm_wr32(device, 0x69010c + hdmi, vendor_infoframe.subpack0_low);
     66		nvkm_wr32(device, 0x690110 + hdmi, vendor_infoframe.subpack0_high);
     67		/* Is there a second (or further?) set of subpack registers here? */
     68		nvkm_mask(device, 0x690100 + hdmi, 0x00000001, 0x00000001);
     69	}
     70
     71
     72	/* ??? InfoFrame? */
     73	nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000000);
     74	nvkm_wr32(device, 0x6900cc + hdmi, 0x00000010);
     75	nvkm_mask(device, 0x6900c0 + hdmi, 0x00000001, 0x00000001);
     76
     77	/* ??? */
     78	nvkm_wr32(device, 0x690080 + hdmi, 0x82000000);
     79
     80	/* HDMI_CTRL */
     81	nvkm_mask(device, 0x616798 + hoff, 0x401f007f, ctrl);
     82}