diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-07-17 12:24:55 +0530 |
|---|---|---|
| committer | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2023-08-26 16:54:45 +0000 |
| commit | ff8d92038cf92c886873c0e0628ba1272e6a087c (patch) | |
| tree | 788814825515524f396da2b2bb9bf1122e7af2c6 /drivers/pci/controller/dwc/pcie-qcom-ep.c | |
| parent | d9d9f26f1666b8e4052b7b40b2f17c456da0fba3 (diff) | |
PCI: qcom-ep: Add eDMA support
Qualcomm PCIe Endpoint controllers have the in-built Embedded DMA (eDMA)
peripheral for offloading the data transfer between the PCIe bus and
memory.
Let's add support for it by enabling the eDMA IRQ in the driver. The
eDMA DMA Engine driver will handle the rest of the functionality.
Since the eDMA on Qualcomm platforms only uses a single IRQ for all
channels, use 1 for edma.nr_irqs.
[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20230717065459.14138-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-qcom-ep.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-qcom-ep.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 736be5bee458..1baec81183b6 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -74,6 +74,7 @@ #define PARF_INT_ALL_PLS_ERR BIT(15) #define PARF_INT_ALL_PME_LEGACY BIT(16) #define PARF_INT_ALL_PLS_PME BIT(17) +#define PARF_INT_ALL_EDMA BIT(22) /* PARF_BDF_TO_SID_CFG register fields */ #define PARF_BDF_TO_SID_BYPASS BIT(0) @@ -395,7 +396,7 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci) writel_relaxed(0, pcie_ep->parf + PARF_INT_ALL_MASK); val = PARF_INT_ALL_LINK_DOWN | PARF_INT_ALL_BME | PARF_INT_ALL_PM_TURNOFF | PARF_INT_ALL_DSTATE_CHANGE | - PARF_INT_ALL_LINK_UP; + PARF_INT_ALL_LINK_UP | PARF_INT_ALL_EDMA; writel_relaxed(val, pcie_ep->parf + PARF_INT_ALL_MASK); ret = dw_pcie_ep_init_complete(&pcie_ep->pci.ep); @@ -744,6 +745,7 @@ static int qcom_pcie_ep_probe(struct platform_device *pdev) pcie_ep->pci.dev = dev; pcie_ep->pci.ops = &pci_ops; pcie_ep->pci.ep.ops = &pci_ep_ops; + pcie_ep->pci.edma.nr_irqs = 1; platform_set_drvdata(pdev, pcie_ep); ret = qcom_pcie_ep_get_resources(pdev, pcie_ep); |