Arto Merilainen 6557218255 video: tegra: host: Use dmabuf instead of fd ...

The buffer management code is currently using fd as the buffer
identifier, however, fds are ambiguous as identifiers: If user
closes a dmabuf fd and allocates a new one, the two buffers may
share the same fd. If the new dmabuf fd is passed to kernel,
kernel incorrectly uses the old memory buffer.

This patch reworks buffer management code to use dmabuf pointers
as identifier instead of dmabuf fds.

Reduce PVA_MAX_PIN_BUFFER from 256 to 64

nvhost_buffer_pin, nvhost_buffer_unpin, nvhost_get_iova_addr,
nvhost_buffer_submit_pin and nvhost_buffer_submit_unpin are
modified to pass dmabuf pointer instead of fd handle.

JIRA PVA-357

Change-Id: I1f736cbcf704d0872a8e97de28308649f0f1586b
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Vinod G <vinodg@nvidia.com>
Signed-off-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-on: http://git-master/r/1455918
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2023-04-14 11:46:40 +00:00

..

tegra

video: tegra: host: Use dmabuf instead of fd

2023-04-14 11:46:40 +00:00