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gpu: nvgpu: support usermode submit buffers

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Import userd and gpfifo buffers from userspace if provided via
NVGPU_IOCTL_CHANNEL_ALLOC_GPFIFO_EX. Also supply the work submit token
(i.e., the hw channel id) to userspace.

To keep the buffers alive, store their dmabuf and attachment/sgt handles
in nvgpu_channel_linux. Our nvgpu_mem doesn't provide such data for
buffers that are mainly in kernel use. The buffers are freed via a new
API in the os_channel interface.

Fix a bug in gk20a_channel_free_usermode_buffers: also unmap the
usermode gpfifo buffer.

Bug 200145225

Change-Id: I8416af7085c91b044ac8ccd9faa38e2a6d0c3946
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1795821
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Konsta Holtta
2018-09-11 14:47:51 +03:00
committed by mobile promotions
parent 9de6d20abb
commit 99b1c6dcdf
7 changed files with 204 additions and 3 deletions
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15
drivers/gpu/nvgpu/os/linux/channel.h
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@@ -63,6 +63,19 @@ struct nvgpu_os_fence_framework {
struct sync_timeline *timeline;
};
struct nvgpu_usermode_bufs_linux {
/*
* Common low level info of these is stored in nvgpu_mems in
* channel_gk20a; these hold lifetimes for the actual dmabuf and its
* dma mapping.
*/
struct nvgpu_usermode_buf_linux {
struct dma_buf *dmabuf;
struct dma_buf_attachment *attachment;
struct sg_table *sgt;
} gpfifo, userd;
};
struct nvgpu_channel_linux {
struct channel_gk20a *ch;
@@ -72,6 +85,8 @@ struct nvgpu_channel_linux {
struct nvgpu_error_notifier error_notifier;
struct dma_buf *cyclestate_buffer_handler;
struct nvgpu_usermode_bufs_linux usermode;
};
u32 nvgpu_submit_gpfifo_user_flags_to_common_flags(u32 user_flags);