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| author |   Kishon Vijay Abraham I <kishon@ti.com> | 2019-03-25 15:09:31 +0530 |
|---|---|---|
| committer |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-04-15 13:24:01 +0100 |
| commit | a9f4c2d2f99ec85ebc734a5bfb21a2cf93c169ad (patch) | |
| tree | 4741b3e680eb06e7aa5bb9f1300ecd9e24a7312f /drivers/pci/controller/dwc/pcie-designware.c | |
| parent | dt-bindings: PCI: Document "atu" reg-names (diff) | |
| download | linux-dev-a9f4c2d2f99ec85ebc734a5bfb21a2cf93c169ad.tar.xz linux-dev-a9f4c2d2f99ec85ebc734a5bfb21a2cf93c169ad.zip | |
PCI: dwc: Enable iATU unroll for endpoint too
iatu_unroll_enabled flag is set only for Designware in host mode.
However iATU unroll can be applicable for endpoint mode too. Set
iatu_unroll_enabled flag in dw_pcie_setup() which is common for
both host mode and endpoint mode.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 31f6331ca46f..a14ca00f72aa 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -339,6 +339,17 @@ int dw_pcie_link_up(struct dw_pcie *pci) (!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING))); } +static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) +{ + u32 val; + + val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT); + if (val == 0xffffffff) + return 1; + + return 0; +} + void dw_pcie_setup(struct dw_pcie *pci) { int ret; @@ -347,6 +358,14 @@ void dw_pcie_setup(struct dw_pcie *pci) struct device *dev = pci->dev; struct device_node *np = dev->of_node; + /* Get iATU unroll support */ + pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci); + dev_dbg(pci->dev, "iATU unroll: %s\n", + pci->iatu_unroll_enabled ? "enabled" : "disabled"); + + if (pci->iatu_unroll_enabled && !pci->atu_base) + pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; + ret = of_property_read_u32(np, "num-lanes", &lanes); if (ret) lanes = 0; |