As AE4DMA offers multi-channel functionality compared to PTDMA’s single
queue, utilize multi-queue, which supports higher speeds than PTDMA, to
achieve higher performance using the AE4DMA workqueue based mechanism.
Fixes: 69a47b16a5 ("dmaengine: ptdma: Extend ptdma to support multi-channel and version")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250203162511.911946-4-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Instead of using the defined maximum hardware queue, which can lead to
incorrect values if the counts mismatch, use the exact supported MSI
count and its corresponding IRQ number.
Fixes: 90a30e268d ("dmaengine: ae4dma: Add AMD ae4dma controller driver")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250203162511.911946-3-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Two previously used PCI IDs are deprecated and should not be used for
AE4DMA. Hence, remove as they are unsupported for AE4DMA.
Fixes: 90a30e268d ("dmaengine: ae4dma: Add AMD ae4dma controller driver")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250203162511.911946-2-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Don't populate the read-only arrays h2c_types and c2h_types on the
stack at run time, instead make them static const.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20240912131017.588141-1-colin.i.king@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The get_dma_ops and set_dma_ops APIs were never for driver to use. Remove
these calls from QDMA driver. Instead, pass the DMA device pointer from the
qdma_platdata structure.
Fixes: 73d5fc92a1 ("dmaengine: amd: qdma: Add AMD QDMA driver")
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240918181022.2155715-1-lizhi.hou@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Use the ptdma_debugfs_setup function to register debugfs for AE4DMA DMA
engine.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-7-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Use the pt_dmaengine_register function to register a AE4DMA DMA engine.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-5-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add support for AMD AE4DMA controller. It performs high-bandwidth
memory to memory and IO copy operation. Device commands are managed
via a circular queue of 'descriptors', each of which specifies source
and destination addresses for copying a single buffer of data.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-3-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
PTDMA driver is the AMD DMA driver, and newer AMD platforms support newer
DMA engines. Hence, move the current drivers to the AMD directory. This
would also mean that future driver submissions to the AMD DMA driver will
also land in the AMD-specific directory.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-2-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
After commit 0edb555a65 ("platform: Make platform_driver::remove()
return void") .remove() is (again) the right callback to implement for
platform drivers.
Convert all platform drivers below drivers/dma after the previous
conversion commits apart from the wireless drivers to use .remove(),
with the eventual goal to drop struct platform_driver::remove_new(). As
.remove() and .remove_new() have the same prototypes, conversion is done
by just changing the structure member name in the driver initializer.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/20241004062227.187726-2-u.kleine-koenig@baylibre.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Adds driver to enable PCIe board which uses AMD QDMA (the Queue-based
Direct Memory Access) subsystem. For example, Xilinx Alveo V70 AI
Accelerator devices.
https://www.xilinx.com/applications/data-center/v70.html
The QDMA subsystem is used in conjunction with the PCI Express IP block
to provide high performance data transfer between host memory and the
card's DMA subsystem.
+-------+ +-------+ +-----------+
PCIe | | | | | |
Tx/Rx | | | | AXI | |
<=======> | PCIE | <===> | QDMA | <====>| User Logic|
| | | | | |
+-------+ +-------+ +-----------+
The primary mechanism to transfer data using the QDMA is for the QDMA
engine to operate on instructions (descriptors) provided by the host
operating system. Using the descriptors, the QDMA can move data in both
the Host to Card (H2C) direction, or the Card to Host (C2H) direction.
The QDMA provides a per-queue basis option whether DMA traffic goes
to an AXI4 memory map (MM) interface or to an AXI4-Stream interface.
The hardware detail is provided by
https://docs.xilinx.com/r/en-US/pg302-qdma
Implements dmaengine APIs to support MM DMA transfers.
- probe the available DMA channels
- use dma_slave_map for channel lookup
- use virtual channel to manage dmaengine tx descriptors
- implement device_prep_slave_sg callback to handle host scatter gather
list
Signed-off-by: Nishad Saraf <nishads@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://lore.kernel.org/r/20240819211948.688786-2-lizhi.hou@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Basavaraj Natikar
Vinod Koul
Colin Ian King
Lizhi Hou
Uwe Kleine-König
Nishad Saraf