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>
To finish OS unification of the submit path, move the
gk20a_submit_channel_gpfifo* functions to a file that's accessible also
outside Linux code.
Also change the prefix of the submit functions from gk20a_ to nvgpu_.
Jira NVGPU-705
Change-Id: I8ca355d1eb69771fb016c7a21fc7f102ca7967d7
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1760421
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
The biggest remaining Linuxism in the submit path is the
copy_from_user() calls for reading the gpfifo entries to the HW-visible
buffer. Abstract away the copy of one such segment starting at some
offset and keep the wraparound logic and vidmem proxy in the core submit
path.
Jira NVGPU-705
Change-Id: I0c6438045c695e5e3f5da4fbc0c92d2c6e7f32cb
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1730480
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
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Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
gk20a_submit_channel_gpfifo() supports reading the gpfifo entries from
either a kernel buffer or an userspace buffer in an ioctl. Add two
separate entry points: one for the ioctl and another for any other
kernel use. This shortens the function prototypes and simplifies and
clarifies the call sites slightly.
Jira NVGPU-705
Change-Id: If5141a459261a451f78cc50972f4c94d95ba44d1
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1730479
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
