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Tegra SoCs have an IOMMU that can be used to present non-contiguous physical memory as contiguous to the GPU and maximize the use of large pages in the GPU MMU, leading to performance gains. This patch adds support for probing such a IOMMU if present and make its properties available in the nouveau_platform_gpu structure so subsystems can take advantage of it. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
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* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
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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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __NOUVEAU_PLATFORM_H__
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#define __NOUVEAU_PLATFORM_H__
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#include "core/device.h"
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#include "core/mm.h"
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struct reset_control;
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struct clk;
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struct regulator;
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struct iommu_domain;
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struct platform_driver;
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struct nouveau_platform_gpu {
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struct reset_control *rst;
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struct clk *clk;
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struct clk *clk_pwr;
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struct regulator *vdd;
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struct {
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/*
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* Protects accesses to mm from subsystems
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*/
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struct mutex mutex;
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struct nvkm_mm _mm;
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/*
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* Just points to _mm. We need this to avoid embedding
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* struct nvkm_mm in os.h
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*/
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struct nvkm_mm *mm;
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struct iommu_domain *domain;
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unsigned long pgshift;
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} iommu;
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};
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struct nouveau_platform_device {
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struct nvkm_device device;
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struct nouveau_platform_gpu *gpu;
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int gpu_speedo;
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};
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#define nv_device_to_platform(d) \
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container_of(d, struct nouveau_platform_device, device)
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extern struct platform_driver nouveau_platform_driver;
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#endif
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