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gpu: host1x: Add context device management code

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Add code to register context devices from device tree, allocate them
out and manage their refcounts.

Bug 3724727

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I5a48ef57c8e9c8bab199dbc2d449535251c7f198
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2745961
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Brad Griffis <bgriffis@nvidia.com>
This commit is contained in:
Mikko Perttunen
2021-01-12 12:40:05 +02:00
committed by Laxman Dewangan
parent 7b4206605d
commit 933d4c9900
1 changed files with 34 additions and 0 deletions
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34
drivers/gpu/host1x/include/linux/host1x-next.h
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@@ -453,4 +453,38 @@ int tegra_mipi_disable(struct tegra_mipi_device *device);
int tegra_mipi_start_calibration(struct tegra_mipi_device *device);
int tegra_mipi_finish_calibration(struct tegra_mipi_device *device);
/* host1x memory contexts */
struct host1x_memory_context {
struct host1x *host;
refcount_t ref;
struct pid *owner;
struct device dev;
u64 dma_mask;
u32 stream_id;
};
#ifdef CONFIG_IOMMU_API
struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
struct pid *pid);
void host1x_memory_context_get(struct host1x_memory_context *cd);
void host1x_memory_context_put(struct host1x_memory_context *cd);
#else
static inline struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
struct pid *pid)
{
return NULL;
}
static inline void host1x_memory_context_get(struct host1x_memory_context *cd)
{
}
static inline void host1x_memory_context_put(struct host1x_memory_context *cd)
{
}
#endif
#endif