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      1 /*	$NetBSD: radeon_uvd_v3_1.c,v 1.2 2021/12/18 23:45:43 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 Advanced Micro Devices, 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: Christian Knig <christian.koenig (at) amd.com>
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: radeon_uvd_v3_1.c,v 1.2 2021/12/18 23:45:43 riastradh Exp $");
     29 
     30 #include "radeon.h"
     31 #include "radeon_asic.h"
     32 #include "nid.h"
     33 
     34 /**
     35  * uvd_v3_1_semaphore_emit - emit semaphore command
     36  *
     37  * @rdev: radeon_device pointer
     38  * @ring: radeon_ring pointer
     39  * @semaphore: semaphore to emit commands for
     40  * @emit_wait: true if we should emit a wait command
     41  *
     42  * Emit a semaphore command (either wait or signal) to the UVD ring.
     43  */
     44 bool uvd_v3_1_semaphore_emit(struct radeon_device *rdev,
     45 			     struct radeon_ring *ring,
     46 			     struct radeon_semaphore *semaphore,
     47 			     bool emit_wait)
     48 {
     49 	uint64_t addr = semaphore->gpu_addr;
     50 
     51 	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_LOW, 0));
     52 	radeon_ring_write(ring, (addr >> 3) & 0x000FFFFF);
     53 
     54 	radeon_ring_write(ring, PACKET0(UVD_SEMA_ADDR_HIGH, 0));
     55 	radeon_ring_write(ring, (addr >> 23) & 0x000FFFFF);
     56 
     57 	radeon_ring_write(ring, PACKET0(UVD_SEMA_CMD, 0));
     58 	radeon_ring_write(ring, 0x80 | (emit_wait ? 1 : 0));
     59 
     60 	return true;
     61 }
     62