linux-kernel - [PATCH v1 0/6] Add Change to integrate HDMA with dwc ep driver

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Date: Fri, 19 Jan 2024 18:30:16 +0530
From: Mrinmay Sarkar <quic_msarkar@...cinc.com>
To: vkoul@...nel.org, jingoohan1@...il.com, conor+dt@...nel.org,
        konrad.dybcio@...aro.org, manivannan.sadhasivam@...aro.org,
        robh+dt@...nel.org
Cc: quic_shazhuss@...cinc.com, quic_nitegupt@...cinc.com,
        quic_ramkri@...cinc.com, quic_nayiluri@...cinc.com,
        dmitry.baryshkov@...aro.org, quic_krichai@...cinc.com,
        quic_vbadigan@...cinc.com, quic_parass@...cinc.com,
        quic_schintav@...cinc.com, quic_shijjose@...cinc.com,
        Mrinmay Sarkar <quic_msarkar@...cinc.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Kishon Vijay Abraham I <kishon@...nel.org>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, mhi@...ts.linux.dev
Subject: [PATCH v1 0/6] Add Change to integrate HDMA with dwc ep driver

Hyper DMA (HDMA) is already supported by the dw-edma dmaengine driver.
Unlike it's predecessor Embedded DMA (eDMA), HDMA supports only the
unrolled mapping format. This patch series is to integrate HDMA with
dwc ep driver.

Add change to provide a valid base address of the CSRs from the
platform driver and also provides read/write channels count from
platform driver since there is no standard way to auto detect the
number of available read/write channels in a platform and set the
mapping format in platform driver for HDMA.

This series passes 'struct dw_edma_chip' to irq_vector() as it needs
to access that particular structure and fix to get the eDMA/HDMA
max channel count. Also move the HDMA max channel definition to edma.h
to maintain uniformity with eDMA.

Dependency
----------
Depends on:
https://lore.kernel.org/dmaengine/20231117-b4-feature_hdma_mainline-v6-0-ebf7aa0e40d7@bootlin.com/
https://lore.kernel.org/all/1701432377-16899-1-git-send-email-quic_msarkar@quicinc.com/

Manivannan Sadhasivam (4):
  dmaengine: dw-edma: Pass 'struct dw_edma_chip' to irq_vector()
  dmaengine: dw-edma: Introduce helpers for getting the eDMA/HDMA max
    channel count
  PCI: dwc: Add HDMA support
  dmaengine: dw-edma: Move HDMA_V0_MAX_NR_CH definition to edma.h

Mrinmay Sarkar (2):
  PCI: qcom-ep: Provide number of read/write channel for HDMA
  PCI: epf-mhi: Add flag to enable HDMA for SA8775P

 drivers/dma/dw-edma/dw-edma-core.c           | 29 ++++++++++---
 drivers/dma/dw-edma/dw-edma-pcie.c           |  4 +-
 drivers/dma/dw-edma/dw-hdma-v0-core.c        |  4 +-
 drivers/dma/dw-edma/dw-hdma-v0-regs.h        |  3 +-
 drivers/pci/controller/dwc/pcie-designware.c | 63 ++++++++++++++++++++++------
 drivers/pci/controller/dwc/pcie-qcom-ep.c    | 19 ++++++++-
 drivers/pci/endpoint/functions/pci-epf-mhi.c |  1 +
 include/linux/dma/edma.h                     | 18 +++++++-
 8 files changed, 115 insertions(+), 26 deletions(-)

-- 
2.7.4