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/*
* 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;
}
}
}
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