From 8914391b4e6517ca3dbbb975fc38ce13b0c5ee45 Mon Sep 17 00:00:00 2001
From: chris hyser <chris.hyser@oracle.com>
Date: Wed, 28 Sep 2016 12:19:45 -0700
Subject: 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>
---
arch/sparc/kernel/pci_sun4v.c | 36 ++++++++++++++++++++++++++----------
1 file changed, 26 insertions(+), 10 deletions(-)
(limited to 'arch/sparc')
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;
}
--
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