On Tue, Mar 12, 2024 at 12:04:17PM +0300, Serge Semin wrote: > Hi Mani > > On Wed, Mar 06, 2024 at 03:51:57PM +0530, Manivannan Sadhasivam wrote: > > In order to add support for Hyper DMA (HDMA), let's refactor the existing > > dw_pcie_edma_find_chip() API by moving the common code to separate > > functions. > > > > No functional change. > > > > Suggested-by: Serge Semin <fancer.lancer@xxxxxxxxx> > > Reviewed-by: Siddharth Vadapalli <s-vadapalli@xxxxxx> > > Reviewed-by: Frank Li <Frank.Li@xxxxxxx> > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > > --- > > drivers/pci/controller/dwc/pcie-designware.c | 40 +++++++++++++++++++++++----- > > 1 file changed, 33 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c > > index 250cf7f40b85..3a26dfc5368f 100644 > > --- a/drivers/pci/controller/dwc/pcie-designware.c > > +++ b/drivers/pci/controller/dwc/pcie-designware.c > > @@ -880,7 +880,17 @@ static struct dw_edma_plat_ops dw_pcie_edma_ops = { > > .irq_vector = dw_pcie_edma_irq_vector, > > }; > > > > -static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > > +static void dw_pcie_edma_init_data(struct dw_pcie *pci) > > +{ > > + pci->edma.dev = pci->dev; > > + > > + if (!pci->edma.ops) > > + pci->edma.ops = &dw_pcie_edma_ops; > > + > > + pci->edma.flags |= DW_EDMA_CHIP_LOCAL; > > +} > > + > > +static int dw_pcie_edma_find_mf(struct dw_pcie *pci) > > { > > u32 val; > > > > @@ -902,8 +912,6 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > > > > if (val == 0xFFFFFFFF && pci->edma.reg_base) { > > pci->edma.mf = EDMA_MF_EDMA_UNROLL; > > - > > - val = dw_pcie_readl_dma(pci, PCIE_DMA_CTRL); > > } else if (val != 0xFFFFFFFF) { > > pci->edma.mf = EDMA_MF_EDMA_LEGACY; > > > > @@ -912,12 +920,17 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > > return -ENODEV; > > } > > > > - pci->edma.dev = pci->dev; > > + return 0; > > +} > > > > - if (!pci->edma.ops) > > - pci->edma.ops = &dw_pcie_edma_ops; > > +static int dw_pcie_edma_find_channels(struct dw_pcie *pci) > > +{ > > + u32 val; > > > > > - pci->edma.flags |= DW_EDMA_CHIP_LOCAL; > > + if (pci->edma.mf == EDMA_MF_EDMA_LEGACY) > > + val = dw_pcie_readl_dbi(pci, PCIE_DMA_VIEWPORT_BASE + PCIE_DMA_CTRL); > > + else > > + val = dw_pcie_readl_dma(pci, PCIE_DMA_CTRL); > > Once again: > > On Tue, Feb 27, 2024 at 01:04:55PM +0530, Manivannan Sadhasivam wrote: > > On Tue, Feb 27, 2024 at 12:00:41AM +0300, Serge Semin wrote: > > > The entire > > > > > > + if (pci->edma.mf == EDMA_MF_EDMA_LEGACY) > > > + val = dw_pcie_readl_dbi(pci, PCIE_DMA_VIEWPORT_BASE + PCIE_DMA_CTRL); > > > + else > > > + val = dw_pcie_readl_dma(pci, PCIE_DMA_CTRL); > > > > > > can be replaced with a single line > > > > > > + val = dw_pcie_readl_dma(pci, PCIE_DMA_CTRL); > > > > > > since in the legacy case (reg_base = PCIE_DMA_VIEWPORT_BASE) the > > > pci->edma.reg_base has been initialized by now. > > > > > > > Ah okay, got it! > Sorry, I had this change but looks like it got lost during rebase somehow. Will bring it back. - Mani -- மணிவண்ணன் சதாசிவம்