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Diffstat (limited to 'Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers b/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers new file mode 100644 index 000000000000..a243984ed420 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers @@ -0,0 +1,52 @@ +What: /sys/kernel/dmabuf/buffers +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: The /sys/kernel/dmabuf/buffers directory contains a + snapshot of the internal state of every DMA-BUF. + /sys/kernel/dmabuf/buffers/<inode_number> will contain the + statistics for the DMA-BUF with the unique inode number + <inode_number> +Users: kernel memory tuning/debugging tools + +What: /sys/kernel/dmabuf/buffers/<inode_number>/exporter_name +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This file is read-only and contains the name of the exporter of + the DMA-BUF. + +What: /sys/kernel/dmabuf/buffers/<inode_number>/size +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This file is read-only and specifies the size of the DMA-BUF in + bytes. + +What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This directory will contain subdirectories representing every + attachment of the DMA-BUF. + +What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid> +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This directory will contain information on the attached device + and the number of current distinct device mappings. + +What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid>/device +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This file is read-only and is a symlink to the attached device's + sysfs entry. + +What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid>/map_counter +Date: May 2021 +KernelVersion: v5.13 +Contact: Hridya Valsaraju <hridya@google.com> +Description: This file is read-only and contains a map_counter indicating the + number of distinct device mappings of the attachment. |