| Message ID | 20240306-dw-hdma-v4-1-9fed506e95be@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: dwc: Add support for integrating HDMA with DWC EP driver | expand |
Hello Manivannan, > From: Manivannan Sadhasivam, Sent: Wednesday, March 6, 2024 7:22 PM > > 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@gmail.com> > Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com> > Reviewed-by: Frank Li <Frank.Li@nxp.com> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Thank you for the patch! Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Best regards, Yoshihiro Shimoda > --- > 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); > > pci->edma.ll_wr_cnt = FIELD_GET(PCIE_DMA_NUM_WR_CHAN, val); > pci->edma.ll_rd_cnt = FIELD_GET(PCIE_DMA_NUM_RD_CHAN, val); > @@ -930,6 +943,19 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > return 0; > } > > +static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > +{ > + int ret; > + > + dw_pcie_edma_init_data(pci); > + > + ret = dw_pcie_edma_find_mf(pci); > + if (ret) > + return ret; > + > + return dw_pcie_edma_find_channels(pci); > +} > + > static int dw_pcie_edma_irq_verify(struct dw_pcie *pci) > { > struct platform_device *pdev = to_platform_device(pci->dev); > > -- > 2.25.1
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@gmail.com> > Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com> > Reviewed-by: Frank Li <Frank.Li@nxp.com> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > --- > 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! -Serge(y) > > pci->edma.ll_wr_cnt = FIELD_GET(PCIE_DMA_NUM_WR_CHAN, val); > pci->edma.ll_rd_cnt = FIELD_GET(PCIE_DMA_NUM_RD_CHAN, val); > @@ -930,6 +943,19 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > return 0; > } > > +static int dw_pcie_edma_find_chip(struct dw_pcie *pci) > +{ > + int ret; > + > + dw_pcie_edma_init_data(pci); > + > + ret = dw_pcie_edma_find_mf(pci); > + if (ret) > + return ret; > + > + return dw_pcie_edma_find_channels(pci); > +} > + > static int dw_pcie_edma_irq_verify(struct dw_pcie *pci) > { > struct platform_device *pdev = to_platform_device(pci->dev); > > -- > 2.25.1 >
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); pci->edma.ll_wr_cnt = FIELD_GET(PCIE_DMA_NUM_WR_CHAN, val); pci->edma.ll_rd_cnt = FIELD_GET(PCIE_DMA_NUM_RD_CHAN, val); @@ -930,6 +943,19 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci) return 0; } +static int dw_pcie_edma_find_chip(struct dw_pcie *pci) +{ + int ret; + + dw_pcie_edma_init_data(pci); + + ret = dw_pcie_edma_find_mf(pci); + if (ret) + return ret; + + return dw_pcie_edma_find_channels(pci); +} + static int dw_pcie_edma_irq_verify(struct dw_pcie *pci) { struct platform_device *pdev = to_platform_device(pci->dev);