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sparc64: Enable PCI IOMMU version 2 API

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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>
This commit is contained in:
chris hyser 2016-09-28 12:19:45 -07:00 • committed by David S. Miller
parent cdd4f4c710
commit 8914391b4e
1 changed files with 26 additions and 10 deletions

36
arch/sparc/kernel/pci_sun4v.c
View file

@ -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;
}