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| author | Moti Haimovski <mhaimovski@habana.ai> | 2019-11-12 09:40:11 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-03-24 10:54:16 +0200 |
| commit | 5cce51464c61b868157e578261d45fe389e81e54 (patch) | |
| tree | 594d4962f55cc80f74de4ee33b69b1161387e807 /Documentation | |
| parent | 0c002ceb39feb26c53ed55ae490b7e6d3b0e6904 (diff) | |
| download | linux-stable-5cce51464c61b868157e578261d45fe389e81e54.tar.gz linux-stable-5cce51464c61b868157e578261d45fe389e81e54.tar.bz2 linux-stable-5cce51464c61b868157e578261d45fe389e81e54.zip | |
habanalabs: add debugfs write64/read64
Allow debug user to write/read 64-bit data through debugfs.
This will expedite the dump process of the (large) internal
memories of the device done during debug.
Signed-off-by: Moti Haimovski <mhaimovski@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-driver-habanalabs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-driver-habanalabs b/Documentation/ABI/testing/debugfs-driver-habanalabs index f0ac14b70ecb..a73601c5121e 100644 --- a/Documentation/ABI/testing/debugfs-driver-habanalabs +++ b/Documentation/ABI/testing/debugfs-driver-habanalabs @@ -43,6 +43,20 @@ Description: Allows the root user to read or write directly through the If the IOMMU is disabled, it also allows the root user to read or write from the host a device VA of a host mapped memory +What: /sys/kernel/debug/habanalabs/hl<n>/data64 +Date: Jan 2020 +KernelVersion: 5.6 +Contact: oded.gabbay@gmail.com +Description: Allows the root user to read or write 64 bit data directly + through the device's PCI bar. Writing to this file generates a + write transaction while reading from the file generates a read + transaction. This custom interface is needed (instead of using + the generic Linux user-space PCI mapping) because the DDR bar + is very small compared to the DDR memory and only the driver can + move the bar before and after the transaction. + If the IOMMU is disabled, it also allows the root user to read + or write from the host a device VA of a host mapped memory + What: /sys/kernel/debug/habanalabs/hl<n>/device Date: Jan 2019 KernelVersion: 5.1 |