linux/drivers/gpu/drm/nouveau/nouveau_platform.h
Alexandre Courbot 58fd9375c2 drm/nouveau/platform: probe IOMMU if present
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>
2015-04-14 17:00:44 +10:00

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