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PCI: layerscape: Modify the way of getting capability with different PEX 

The different PCIe controller in one board may be have different
capability of MSI or MSIX, so change the way of getting the MSI
capability, make it more flexible.

Link: https://lore.kernel.org/r/20200918080024.13639-8-Zhiqiang.Hou@nxp.com
Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Xiaowei Bao 2020-09-18 16:00:19 +08:00 committed by Lorenzo Pieralisi
parent 20e458fb92
commit cc255eb0bf
1 changed files with 23 additions and 8 deletions
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31
drivers/pci/controller/dwc/pci-layerscape-ep.c
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@ -22,6 +22,7 @@
struct ls_pcie_ep {
struct dw_pcie *pci;
struct pci_epc_features *ls_epc;
};
#define to_ls_pcie_ep(x) dev_get_drvdata((x)->dev)
@ -40,26 +41,31 @@ static const struct of_device_id ls_pcie_ep_of_match[] = {
{ },
};
static const struct pci_epc_features ls_pcie_epc_features = {
.linkup_notifier = false,
.msi_capable = true,
.msix_capable = false,
.bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4),
};
static const struct pci_epc_features*
ls_pcie_ep_get_features(struct dw_pcie_ep *ep)
{
return &ls_pcie_epc_features;
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
return pcie->ls_epc;
}
static void ls_pcie_ep_init(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
struct dw_pcie_ep_func *ep_func;
enum pci_barno bar;
ep_func = dw_pcie_ep_get_func_from_ep(ep, 0);
if (!ep_func)
return;
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
dw_pcie_ep_reset_bar(pci, bar);
pcie->ls_epc->msi_capable = ep_func->msi_cap ? true : false;
pcie->ls_epc->msix_capable = ep_func->msix_cap ? true : false;
}
static int ls_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
@ -119,6 +125,7 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct dw_pcie *pci;
struct ls_pcie_ep *pcie;
struct pci_epc_features *ls_epc;
struct resource *dbi_base;
int ret;
@ -130,6 +137,10 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
if (!pci)
return -ENOMEM;
ls_epc = devm_kzalloc(dev, sizeof(*ls_epc), GFP_KERNEL);
if (!ls_epc)
return -ENOMEM;
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);
if (IS_ERR(pci->dbi_base))
@ -140,6 +151,10 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
pci->ops = &ls_pcie_ep_ops;
pcie->pci = pci;
ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4),
pcie->ls_epc = ls_epc;
platform_set_drvdata(pdev, pcie);
ret = ls_add_pcie_ep(pcie, pdev);