Hi, On Thu, Feb 10, 2022 at 8:40 AM Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> wrote: > > Hi, > > On Wed, Jan 26, 2022 at 07:50:38PM +0000, Lad Prabhakar wrote: > > Hi All, > > > > The current PCIe EPF framework supports DMA data transfers using external > > DMA only, this patch series aims to add support for platforms supporting > > internal DMAC on PCIe for data transfers. > > > > R-Car PCIe supports internal DMAC to transfer data between Internal Bus to > > PCI Express and vice versa. Last patch fills up the required flags and ops > > to support internal DMAC. > > > > Patches 1-3 are for PCIe EPF core to support internal DMAC handling, patch > > 4/5 is to fix test cases based on the conversation [1]. > > > > This looks similar to the Synopsys eDMA IP [1] that goes with the Synopsys PCIe > endpoint IP. Why can't you represent it as a dmaengine driver and use the > existing DMA support? > Let me have a look. Could you please share a link to the Synopsys PCIe endpoint HW manual (the driver doesn't have a binding doc). Cheers, Prabhakar > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/dma/dw-edma > > > Patches are based on top of [1] next branch. > > > > [0] https://www.spinics.net/lists/linux-pci/msg92385.html > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git > > > > Cheers, > > Prabhakar > > > > Lad Prabhakar (5): > > PCI: endpoint: Add ops and flag to support internal DMAC > > PCI: endpoint: Add support to data transfer using internal dmac > > misc: pci_endpoint_test: Add driver data for Renesas RZ/G2{EHMN} > > misc: pci_endpoint_test: Add support to pass flags for buffer > > allocation > > PCI: rcar-ep: Add support for DMAC > > > > drivers/misc/pci_endpoint_test.c | 56 ++++- > > drivers/pci/controller/pcie-rcar-ep.c | 227 ++++++++++++++++++ > > drivers/pci/controller/pcie-rcar.h | 23 ++ > > drivers/pci/endpoint/functions/pci-epf-test.c | 184 ++++++++++---- > > drivers/pci/endpoint/pci-epf-core.c | 32 +++ > > include/linux/pci-epc.h | 8 + > > include/linux/pci-epf.h | 7 + > > 7 files changed, 483 insertions(+), 54 deletions(-) > > > > -- > > 2.25.1 > >
