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a=openpgp-sha256; l=2666; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=xjis6bKP+1qp95+QiF0S2jYEGfXq9eU6iywX/YRTDxg=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBl6EPQZYQ7XCCOMknukdVYfL87jQ5oeOCLcgbMh Gxe1UwQzA2JATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCZehD0AAKCRBVnxHm/pHO 9e3CB/9thwGh4M1yb5s6awK8BCruwq7nQy2+QdrPvMtxU9se6LakPl3/a+HfykMFDkeU0oy8OYd 92/K35muS3jQ4OTWAkaIIGbrm/0cs+VCfXwkom3xHEk6KBK9g3ORDZKI46JrTplcE0WXxbitbca rTa9S3gqc7kHv5oWPB4TxvnWw+Oh8S65767iNU7Z3e7e2QFsbEjSU5L5ETar348B5/d6JS/12tZ 6VwVZlna0k7+Zg5tbbVvlq4s6xcdpoDJsMVJjjcFbvGVwq8UualWrUCJ7xd/J634UCH6GZph597 FOQfFfR3AfuxUYAa2GddMrOiBawCEGdVQkrnA6GXMFS1ZzB5 X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 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 Reviewed-by: Siddharth Vadapalli Reviewed-by: Frank Li Signed-off-by: Manivannan Sadhasivam Reviewed-by: 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);