cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

uvd_v3_1.c (2098B)

      1/*
      2 * Copyright 2013 Advanced Micro Devices, 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: Christian König <christian.koenig@amd.com>
     23 */
     24
     25#include "radeon.h"
     26#include "radeon_asic.h"
     27#include "nid.h"
     28
     29/**
     30 * uvd_v3_1_semaphore_emit - emit semaphore command
     31 *
     32 * @rdev: radeon_device pointer
     33 * @ring: radeon_ring pointer
     34 * @semaphore: semaphore to emit commands for
     35 * @emit_wait: true if we should emit a wait command
     36 *
     37 * Emit a semaphore command (either wait or signal) to the UVD ring.
     38 */
     39bool uvd_v3_1_semaphore_emit(struct radeon_device *rdev,
     40			     struct radeon_ring *ring,
     41			     struct radeon_semaphore *semaphore,
     42			     bool emit_wait)
     43{
     44	uint64_t addr = semaphore->gpu_addr;
     45
     46	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_LOW, 0));
     47	radeon_ring_write(ring, (addr >> 3) & 0x000FFFFF);
     48
     49	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_HIGH, 0));
     50	radeon_ring_write(ring, (addr >> 23) & 0x000FFFFF);
     51
     52	radeon_ring_write(ring, PACKET0(UVD_SEMA_CMD, 0));
     53	radeon_ring_write(ring, 0x80 | (emit_wait ? 1 : 0));
     54
     55	return true;
     56}