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PCI: endpoint: Fix ->set_msix() to take BIR and offset as arguments

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commit 8963106eab ("PCI: endpoint: Add MSI-X interfaces") while
adding support to raise MSI-X interrupts from endpoint didn't include
BAR Indicator register (BIR) configuration and MSI-X table offset as
arguments in pci_epc_set_msix(). This would result in endpoint
controller register using random BAR indicator register, the memory
for which might not be allocated by the endpoint function driver.
Add BAR indicator register and MSI-X table offset as arguments in
pci_epc_set_msix() and allocate space for MSI-X table and pending
bit array (PBA) in pci-epf-test endpoint function driver.

Fixes: 8963106eab ("PCI: endpoint: Add MSI-X interfaces")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Kishon Vijay Abraham I
2020-02-25 13:47:01 +05:30
committed by Lorenzo Pieralisi
parent cf376b4b59
commit 83153d9f36
4 changed files with 49 additions and 13 deletions
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15
drivers/pci/controller/dwc/pcie-designware-ep.c
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@@ -278,7 +278,8 @@ static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
return val;
}
static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
enum pci_barno bir, u32 offset)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@@ -287,12 +288,22 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
if (!ep->msix_cap)
return -EINVAL;
dw_pcie_dbi_ro_wr_en(pci);
reg = ep->msix_cap + PCI_MSIX_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
val &= ~PCI_MSIX_FLAGS_QSIZE;
val |= interrupts;
dw_pcie_dbi_ro_wr_en(pci);
dw_pcie_writew_dbi(pci, reg, val);
reg = ep->msix_cap + PCI_MSIX_TABLE;
val = offset | bir;
dw_pcie_writel_dbi(pci, reg, val);
reg = ep->msix_cap + PCI_MSIX_PBA;
val = (offset + (interrupts * PCI_MSIX_ENTRY_SIZE)) | bir;
dw_pcie_writel_dbi(pci, reg, val);
dw_pcie_dbi_ro_wr_dis(pci);
return 0;