diff options
| author | Thierry Reding <treding@nvidia.com> | 2017-05-04 22:10:31 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-07-02 18:46:20 -0500 |
| commit | c016555091119b469fe49d1b1b359f0ae3fc6ed7 (patch) | |
| tree | 799b0b293f7e2ab6ece698bde2c874197d1a3989 /drivers/pci/host | |
| parent | 769b461fc0c0451bacf75826d5830fc07c5a57e4 (diff) | |
| download | linux-c016555091119b469fe49d1b1b359f0ae3fc6ed7.tar.bz2 | |
PCI: tegra: Support MSI 64-bit addressing
The MSI target address can reside beyond the 32-bit boundary on devices
with more than 2 GiB of system memory. The PCI host bridge on Tegra can
easily support 64-bit addresses, so make sure to pass the upper 32 bits of
the target address to endpoints when allocating MSI entries.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pci-tegra.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 0dadb81eca70..1d1d87e8bcbf 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -235,6 +235,7 @@ struct tegra_msi { struct irq_domain *domain; unsigned long pages; struct mutex lock; + u64 phys; int irq; }; @@ -1448,9 +1449,8 @@ static int tegra_msi_setup_irq(struct msi_controller *chip, irq_set_msi_desc(irq, desc); - msg.address_lo = virt_to_phys((void *)msi->pages); - /* 32 bit address only */ - msg.address_hi = 0; + msg.address_lo = lower_32_bits(msi->phys); + msg.address_hi = upper_32_bits(msi->phys); msg.data = hwirq; pci_write_msi_msg(irq, &msg); @@ -1499,7 +1499,6 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie) const struct tegra_pcie_soc *soc = pcie->soc; struct tegra_msi *msi = &pcie->msi; struct device *dev = pcie->dev; - unsigned long base; int err; u32 reg; @@ -1533,10 +1532,10 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie) /* setup AFI/FPCI range */ msi->pages = __get_free_pages(GFP_KERNEL, 0); - base = virt_to_phys((void *)msi->pages); + msi->phys = virt_to_phys((void *)msi->pages); - afi_writel(pcie, base >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST); - afi_writel(pcie, base, AFI_MSI_AXI_BAR_ST); + afi_writel(pcie, msi->phys >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST); + afi_writel(pcie, msi->phys, AFI_MSI_AXI_BAR_ST); /* this register is in 4K increments */ afi_writel(pcie, 1, AFI_MSI_BAR_SZ); |