| Message ID | 1371660979-21588-10-git-send-email-thomas.petazzoni@free-electrons.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Jun 19, 2013 at 06:56:17PM +0200, Thomas Petazzoni wrote: > This commit adds support for Message Signaled Interrupts in the > Marvell PCIe host controller. The work is very simple: it simply gets > a reference to the msi_chip associated to the PCIe controller thanks > to the msi-parent DT property, and stores this reference in the > pci_bus structure. This is enough to let the Linux PCI core use the > functions of msi_chip to setup and teardown MSIs. > > Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> > --- > drivers/pci/host/pci-mvebu.c | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
On Fri, Jun 21, 2013 at 4:25 AM, Thierry Reding <thierry.reding@gmail.com> wrote: > On Wed, Jun 19, 2013 at 06:56:17PM +0200, Thomas Petazzoni wrote: >> This commit adds support for Message Signaled Interrupts in the >> Marvell PCIe host controller. The work is very simple: it simply gets >> a reference to the msi_chip associated to the PCIe controller thanks >> to the msi-parent DT property, and stores this reference in the >> pci_bus structure. This is enough to let the Linux PCI core use the >> functions of msi_chip to setup and teardown MSIs. >> >> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> >> --- >> drivers/pci/host/pci-mvebu.c | 26 ++++++++++++++++++++++++++ >> 1 file changed, 26 insertions(+) > > Reviewed-by: Thierry Reding <thierry.reding@gmail.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> I assume you'll merge this through arm-soc or some other non-PCI tree. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c index 13a633b..89638d1 100644 --- a/drivers/pci/host/pci-mvebu.c +++ b/drivers/pci/host/pci-mvebu.c @@ -11,6 +11,7 @@ #include <linux/clk.h> #include <linux/module.h> #include <linux/mbus.h> +#include <linux/msi.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/of_address.h> @@ -107,6 +108,7 @@ struct mvebu_pcie_port; struct mvebu_pcie { struct platform_device *pdev; struct mvebu_pcie_port *ports; + struct msi_chip *msi; struct resource io; struct resource realio; struct resource mem; @@ -695,6 +697,12 @@ static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys) return bus; } +void mvebu_pcie_add_bus(struct pci_bus *bus) +{ + struct mvebu_pcie *pcie = sys_to_pcie(bus->sysdata); + bus->msi = pcie->msi; +} + resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev, const struct resource *res, resource_size_t start, @@ -731,6 +739,7 @@ static void __init mvebu_pcie_enable(struct mvebu_pcie *pcie) hw.map_irq = mvebu_pcie_map_irq; hw.ops = &mvebu_pcie_ops; hw.align_resource = mvebu_pcie_align_resource; + hw.add_bus = mvebu_pcie_add_bus; pci_common_init(&hw); } @@ -755,6 +764,21 @@ mvebu_pcie_map_registers(struct platform_device *pdev, return devm_request_and_ioremap(&pdev->dev, ®s); } +static void __init mvebu_pcie_msi_enable(struct mvebu_pcie *pcie) +{ + struct device_node *msi_node; + + msi_node = of_parse_phandle(pcie->pdev->dev.of_node, + "msi-parent", 0); + if (!msi_node) + return; + + pcie->msi = of_msi_chip_find_by_node(msi_node); + + if (pcie->msi) + pcie->msi->dev = &pcie->pdev->dev; +} + static int __init mvebu_pcie_probe(struct platform_device *pdev) { struct mvebu_pcie *pcie; @@ -879,6 +903,8 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev) i++; } + mvebu_pcie_msi_enable(pcie); + mvebu_pcie_enable(pcie); return 0;
This commit adds support for Message Signaled Interrupts in the Marvell PCIe host controller. The work is very simple: it simply gets a reference to the msi_chip associated to the PCIe controller thanks to the msi-parent DT property, and stores this reference in the pci_bus structure. This is enough to let the Linux PCI core use the functions of msi_chip to setup and teardown MSIs. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> --- drivers/pci/host/pci-mvebu.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)