73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
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/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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* Copyright 2009 Jerome Glisse.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <drm/drmP.h>
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#include "amdgpu.h"
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/*
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* GPU scratch registers helpers function.
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*/
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/**
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* amdgpu_gfx_scratch_get - Allocate a scratch register
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*
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* @adev: amdgpu_device pointer
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* @reg: scratch register mmio offset
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*
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* Allocate a CP scratch register for use by the driver (all asics).
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* Returns 0 on success or -EINVAL on failure.
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*/
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int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg)
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{
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int i;
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for (i = 0; i < adev->gfx.scratch.num_reg; i++) {
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if (adev->gfx.scratch.free[i]) {
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adev->gfx.scratch.free[i] = false;
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*reg = adev->gfx.scratch.reg[i];
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return 0;
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}
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}
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return -EINVAL;
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}
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/**
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* amdgpu_gfx_scratch_free - Free a scratch register
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*
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* @adev: amdgpu_device pointer
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* @reg: scratch register mmio offset
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*
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* Free a CP scratch register allocated for use by the driver (all asics)
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*/
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void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg)
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{
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int i;
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for (i = 0; i < adev->gfx.scratch.num_reg; i++) {
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if (adev->gfx.scratch.reg[i] == reg) {
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adev->gfx.scratch.free[i] = true;
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return;
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}
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}
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}
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