73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
|
|
* Copyright 2014 Advanced Micro Devices, Inc.
|
|
* Copyright 2008 Red Hat Inc.
|
|
* Copyright 2009 Jerome Glisse.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#include <drm/drmP.h>
|
|
#include "amdgpu.h"
|
|
|
|
/*
|
|
* GPU scratch registers helpers function.
|
|
*/
|
|
/**
|
|
* amdgpu_gfx_scratch_get - Allocate a scratch register
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @reg: scratch register mmio offset
|
|
*
|
|
* Allocate a CP scratch register for use by the driver (all asics).
|
|
* Returns 0 on success or -EINVAL on failure.
|
|
*/
|
|
int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adev->gfx.scratch.num_reg; i++) {
|
|
if (adev->gfx.scratch.free[i]) {
|
|
adev->gfx.scratch.free[i] = false;
|
|
*reg = adev->gfx.scratch.reg[i];
|
|
return 0;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* amdgpu_gfx_scratch_free - Free a scratch register
|
|
*
|
|
* @adev: amdgpu_device pointer
|
|
* @reg: scratch register mmio offset
|
|
*
|
|
* Free a CP scratch register allocated for use by the driver (all asics)
|
|
*/
|
|
void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adev->gfx.scratch.num_reg; i++) {
|
|
if (adev->gfx.scratch.reg[i] == reg) {
|
|
adev->gfx.scratch.free[i] = true;
|
|
return;
|
|
}
|
|
}
|
|
}
|