'Designware Cores PCI Express DM Controller - Reference
Manual', section 3.2.34.3, VSEC for DEVICE INFORMATION supports
the channel separation mechanisms. Basically, the HDMA IP allows
the user to configure the separation between DMA channel
registers and retrieve it via the VSEC capability mentioned
above.
In order to use the VSEC functionality following changes have
been made:

o Utilize the existing VSEC implementation to retrieve
  the channel separation and translate it to correct size.
o Modify the structs and functions to calculate correct
  DMA channel register base using the channel, direction
  and channel separation selected.

Devendra K Verma (2):
  dmaengine: dw-edma: Enable Chan Separation via VSEC
  dmaengine: dw-edma: Add changes to support Channel Separation

 drivers/dma/dw-edma/dw-edma-pcie.c           | 18 +++++++++++++++
 drivers/dma/dw-edma/dw-hdma-v0-core.c        | 23 ++++++++++++--------
 drivers/dma/dw-edma/dw-hdma-v0-debugfs.c     | 17 +++++----------
 drivers/dma/dw-edma/dw-hdma-v0-regs.h        | 10 ---------
 drivers/pci/controller/dwc/pcie-designware.c |  1 +
 include/linux/dma/edma.h                     |  1 +
 6 files changed, 40 insertions(+), 30 deletions(-)

-- 
2.43.0

On Mon, 07 Sep 2026 15:42:11 +0530, Devendra K Verma wrote:
> 'Designware Cores PCI Express DM Controller - Reference
> Manual', section 3.2.34.3, VSEC for DEVICE INFORMATION supports
> the channel separation mechanisms. Basically, the HDMA IP allows
> the user to configure the separation between DMA channel
> registers and retrieve it via the VSEC capability mentioned
> above.
> In order to use the VSEC functionality following changes have
> been made:
> 
> [...]

Applied, thanks!

[1/2] dmaengine: dw-edma: Enable Chan Separation via VSEC
      commit: 62fb4a3a59223abb4d7baa3e088169767a28d551
[2/2] dmaengine: dw-edma: Add changes to support Channel Separation
      commit: ff4dc66e80d2c31138a9ca31f1a4340dc4919d50

Best regards,
-- 
~Vinod