diff options
Diffstat (limited to 'drivers/pci/controller/dwc')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-qcom-ep.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 925a2427ece1..e2a28939b958 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -47,6 +47,7 @@ #define PARF_DBI_BASE_ADDR_HI 0x354 #define PARF_SLV_ADDR_SPACE_SIZE 0x358 #define PARF_SLV_ADDR_SPACE_SIZE_HI 0x35c +#define PARF_NO_SNOOP_OVERIDE 0x3d4 #define PARF_ATU_BASE_ADDR 0x634 #define PARF_ATU_BASE_ADDR_HI 0x638 #define PARF_SRIS_MODE 0x644 @@ -86,6 +87,10 @@ #define PARF_DEBUG_INT_CFG_BUS_MASTER_EN BIT(2) #define PARF_DEBUG_INT_RADM_PM_TURNOFF BIT(3) +/* PARF_NO_SNOOP_OVERIDE register fields */ +#define WR_NO_SNOOP_OVERIDE_EN BIT(1) +#define RD_NO_SNOOP_OVERIDE_EN BIT(3) + /* PARF_DEVICE_TYPE register fields */ #define PARF_DEVICE_TYPE_EP 0x0 @@ -152,9 +157,11 @@ enum qcom_pcie_ep_link_status { /** * struct qcom_pcie_ep_cfg - Per SoC config struct * @hdma_support: HDMA support on this SoC + * @override_no_snoop: Override NO_SNOOP attribute in TLP to enable cache snooping */ struct qcom_pcie_ep_cfg { bool hdma_support; + bool override_no_snoop; }; /** @@ -175,6 +182,7 @@ struct qcom_pcie_ep_cfg { * @num_clks: PCIe clocks count * @perst_en: Flag for PERST enable * @perst_sep_en: Flag for PERST separation enable + * @cfg: PCIe EP config struct * @link_status: PCIe Link status * @global_irq: Qualcomm PCIe specific Global IRQ * @perst_irq: PERST# IRQ @@ -202,6 +210,7 @@ struct qcom_pcie_ep { u32 perst_en; u32 perst_sep_en; + const struct qcom_pcie_ep_cfg *cfg; enum qcom_pcie_ep_link_status link_status; int global_irq; int perst_irq; @@ -497,6 +506,10 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci) val |= BIT(8); writel_relaxed(val, pcie_ep->parf + PARF_LTSSM); + if (pcie_ep->cfg && pcie_ep->cfg->override_no_snoop) + writel_relaxed(WR_NO_SNOOP_OVERIDE_EN | RD_NO_SNOOP_OVERIDE_EN, + pcie_ep->parf + PARF_NO_SNOOP_OVERIDE); + return 0; err_disable_resources: @@ -811,7 +824,6 @@ static const struct dw_pcie_ep_ops pci_ep_ops = { static int qcom_pcie_ep_probe(struct platform_device *pdev) { - const struct qcom_pcie_ep_cfg *cfg; struct device *dev = &pdev->dev; struct qcom_pcie_ep *pcie_ep; char *name; @@ -826,8 +838,8 @@ static int qcom_pcie_ep_probe(struct platform_device *pdev) pcie_ep->pci.ep.ops = &pci_ep_ops; pcie_ep->pci.edma.nr_irqs = 1; - cfg = of_device_get_match_data(dev); - if (cfg && cfg->hdma_support) { + pcie_ep->cfg = of_device_get_match_data(dev); + if (pcie_ep->cfg && pcie_ep->cfg->hdma_support) { pcie_ep->pci.edma.ll_wr_cnt = 8; pcie_ep->pci.edma.ll_rd_cnt = 8; pcie_ep->pci.edma.mf = EDMA_MF_HDMA_NATIVE; @@ -893,6 +905,7 @@ static void qcom_pcie_ep_remove(struct platform_device *pdev) static const struct qcom_pcie_ep_cfg cfg_1_34_0 = { .hdma_support = true, + .override_no_snoop = true, }; static const struct of_device_id qcom_pcie_ep_match[] = { |