diff options
| -rw-r--r-- | arch/powerpc/sysdev/fsl_msi.c | 39 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/fsl_msi.h | 3 |
2 files changed, 42 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c index e5c344d336ea..89548e07ddeb 100644 --- a/arch/powerpc/sysdev/fsl_msi.c +++ b/arch/powerpc/sysdev/fsl_msi.c @@ -148,14 +148,47 @@ static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq, static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) { + struct pci_controller *hose = pci_bus_to_host(pdev->bus); + struct device_node *np; + phandle phandle = 0; int rc, hwirq = -ENOMEM; unsigned int virq; struct msi_desc *entry; struct msi_msg msg; struct fsl_msi *msi_data; + /* + * If the PCI node has an fsl,msi property, then we need to use it + * to find the specific MSI. + */ + np = of_parse_phandle(hose->dn, "fsl,msi", 0); + if (np) { + if (of_device_is_compatible(np, "fsl,mpic-msi")) + phandle = np->phandle; + else { + dev_err(&pdev->dev, "node %s has an invalid fsl,msi" + " phandle\n", hose->dn->full_name); + return -EINVAL; + } + } + list_for_each_entry(entry, &pdev->msi_list, list) { + /* + * Loop over all the MSI devices until we find one that has an + * available interrupt. + */ list_for_each_entry(msi_data, &msi_head, list) { + /* + * If the PCI node has an fsl,msi property, then we + * restrict our search to the corresponding MSI node. + * The simplest way is to skip over MSI nodes with the + * wrong phandle. Under the Freescale hypervisor, this + * has the additional benefit of skipping over MSI + * nodes that are not mapped in the PAMU. + */ + if (phandle && (phandle != msi_data->phandle)) + continue; + hwirq = msi_bitmap_alloc_hwirqs(&msi_data->bitmap, 1); if (hwirq >= 0) break; @@ -370,6 +403,12 @@ static int __devinit fsl_of_msi_probe(struct platform_device *dev) msi->msiir_offset = features->msiir_offset + (res.start & 0xfffff); + /* + * Remember the phandle, so that we can match with any PCI nodes + * that have an "fsl,msi" property. + */ + msi->phandle = dev->dev.of_node->phandle; + rc = fsl_msi_init_allocator(msi); if (rc) { dev_err(&dev->dev, "Error allocating MSI bitmap\n"); diff --git a/arch/powerpc/sysdev/fsl_msi.h b/arch/powerpc/sysdev/fsl_msi.h index 1313abbc5200..b5d25ba51311 100644 --- a/arch/powerpc/sysdev/fsl_msi.h +++ b/arch/powerpc/sysdev/fsl_msi.h @@ -13,6 +13,7 @@ #ifndef _POWERPC_SYSDEV_FSL_MSI_H #define _POWERPC_SYSDEV_FSL_MSI_H +#include <linux/of.h> #include <asm/msi_bitmap.h> #define NR_MSI_REG 8 @@ -36,6 +37,8 @@ struct fsl_msi { struct msi_bitmap bitmap; struct list_head list; /* support multiple MSI banks */ + + phandle phandle; }; #endif /* _POWERPC_SYSDEV_FSL_MSI_H */ |