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| author | chris hyser <chris.hyser@oracle.com> | 2016-09-28 12:19:45 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-06 01:44:51 -0400 |
| commit | 8914391b4e6517ca3dbbb975fc38ce13b0c5ee45 (patch) | |
| tree | a9757a4121c9438fd4918d8488cbe3c44cf6fe6b /arch | |
| parent | cdd4f4c71047cdd28c13891e6e217765ea1c1bdc (diff) | |
| download | linux-8914391b4e6517ca3dbbb975fc38ce13b0c5ee45.tar.bz2 | |
sparc64: Enable PCI IOMMU version 2 API
Enable Version 2 of the PCI IOMMU API needed for advanced features
such as PCI Relaxed Ordering and greater than 2 GB DMA address
space per root complex.
Signed-off-by: Chris Hyser <chris.hyser@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/kernel/pci_sun4v.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 61c6f935accc..c5c819daf800 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -30,8 +30,19 @@ #define DRIVER_NAME "pci_sun4v" #define PFX DRIVER_NAME ": " -static unsigned long vpci_major = 1; -static unsigned long vpci_minor = 1; +static unsigned long vpci_major; +static unsigned long vpci_minor; + +struct vpci_version { + unsigned long major; + unsigned long minor; +}; + +/* Ordered from largest major to lowest */ +static struct vpci_version vpci_versions[] = { + { .major = 2, .minor = 0 }, + { .major = 1, .minor = 1 }, +}; #define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) @@ -907,22 +918,27 @@ static int pci_sun4v_probe(struct platform_device *op) struct device_node *dp; struct iommu *iommu; u32 devhandle; - int i, err; + int i, err = -ENODEV; dp = op->dev.of_node; if (!hvapi_negotiated++) { - err = sun4v_hvapi_register(HV_GRP_PCI, - vpci_major, - &vpci_minor); + for (i = 0; i < ARRAY_SIZE(vpci_versions); i++) { + vpci_major = vpci_versions[i].major; + vpci_minor = vpci_versions[i].minor; + + err = sun4v_hvapi_register(HV_GRP_PCI, vpci_major, + &vpci_minor); + if (!err) + break; + } if (err) { - printk(KERN_ERR PFX "Could not register hvapi, " - "err=%d\n", err); + pr_err(PFX "Could not register hvapi, err=%d\n", err); return err; } - printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n", - vpci_major, vpci_minor); + pr_info(PFX "Registered hvapi major[%lu] minor[%lu]\n", + vpci_major, vpci_minor); dma_ops = &sun4v_dma_ops; } |