mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 02:23:16 +00:00
58fd9375c2
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
/*
|
|
* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
|
|
*/
|
|
|
|
#ifndef __NOUVEAU_PLATFORM_H__
|
|
#define __NOUVEAU_PLATFORM_H__
|
|
|
|
#include "core/device.h"
|
|
#include "core/mm.h"
|
|
|
|
struct reset_control;
|
|
struct clk;
|
|
struct regulator;
|
|
struct iommu_domain;
|
|
struct platform_driver;
|
|
|
|
struct nouveau_platform_gpu {
|
|
struct reset_control *rst;
|
|
struct clk *clk;
|
|
struct clk *clk_pwr;
|
|
|
|
struct regulator *vdd;
|
|
|
|
struct {
|
|
/*
|
|
* Protects accesses to mm from subsystems
|
|
*/
|
|
struct mutex mutex;
|
|
|
|
struct nvkm_mm _mm;
|
|
/*
|
|
* Just points to _mm. We need this to avoid embedding
|
|
* struct nvkm_mm in os.h
|
|
*/
|
|
struct nvkm_mm *mm;
|
|
struct iommu_domain *domain;
|
|
unsigned long pgshift;
|
|
} iommu;
|
|
};
|
|
|
|
struct nouveau_platform_device {
|
|
struct nvkm_device device;
|
|
|
|
struct nouveau_platform_gpu *gpu;
|
|
|
|
int gpu_speedo;
|
|
};
|
|
|
|
#define nv_device_to_platform(d) \
|
|
container_of(d, struct nouveau_platform_device, device)
|
|
|
|
extern struct platform_driver nouveau_platform_driver;
|
|
|
|
#endif
|