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authorBjorn Helgaas <bhelgaas@google.com>2019-09-23 16:10:30 -0500
committerBjorn Helgaas <bhelgaas@google.com>2019-09-23 16:10:30 -0500
commitcdc7e184abb338dfe24624e90b09d366f0dcfad5 (patch)
tree162ce0c4a76f35b3ea1b503852a35c8585bf6a02 /drivers/pci
parent3efa7f1febe60531c0b5f0397c3e87cfa48591f7 (diff)
parenta1a30170138c9c5157bd514ccd4d76b47060f29b (diff)
Merge branch 'remotes/lorenzo/pci/vmd'
- Fix VMD config addressing to ignore starting bus offset (Jon Derrick) - Fix VMD shadow offset scratchpad address (Jon Derrick) * remotes/lorenzo/pci/vmd: PCI: vmd: Fix shadow offsets to reflect spec changes PCI: vmd: Fix config addressing when using bus offsets
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/controller/vmd.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 4575e0c6dc4b..a35d3f3996d7 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -31,6 +31,9 @@
#define PCI_REG_VMLOCK 0x70
#define MB2_SHADOW_EN(vmlock) (vmlock & 0x2)
+#define MB2_SHADOW_OFFSET 0x2000
+#define MB2_SHADOW_SIZE 16
+
enum vmd_features {
/*
* Device may contain registers which hint the physical location of the
@@ -94,6 +97,7 @@ struct vmd_dev {
struct resource resources[3];
struct irq_domain *irq_domain;
struct pci_bus *bus;
+ u8 busn_start;
struct dma_map_ops dma_ops;
struct dma_domain dma_domain;
@@ -440,7 +444,8 @@ static char __iomem *vmd_cfg_addr(struct vmd_dev *vmd, struct pci_bus *bus,
unsigned int devfn, int reg, int len)
{
char __iomem *addr = vmd->cfgbar +
- (bus->number << 20) + (devfn << 12) + reg;
+ ((bus->number - vmd->busn_start) << 20) +
+ (devfn << 12) + reg;
if ((addr - vmd->cfgbar) + len >=
resource_size(&vmd->dev->resource[VMD_CFGBAR]))
@@ -563,7 +568,7 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
unsigned long flags;
LIST_HEAD(resources);
resource_size_t offset[2] = {0};
- resource_size_t membar2_offset = 0x2000, busn_start = 0;
+ resource_size_t membar2_offset = 0x2000;
struct pci_bus *child;
/*
@@ -576,7 +581,7 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
u32 vmlock;
int ret;
- membar2_offset = 0x2018;
+ membar2_offset = MB2_SHADOW_OFFSET + MB2_SHADOW_SIZE;
ret = pci_read_config_dword(vmd->dev, PCI_REG_VMLOCK, &vmlock);
if (ret || vmlock == ~0)
return -ENODEV;
@@ -588,9 +593,9 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
if (!membar2)
return -ENOMEM;
offset[0] = vmd->dev->resource[VMD_MEMBAR1].start -
- readq(membar2 + 0x2008);
+ readq(membar2 + MB2_SHADOW_OFFSET);
offset[1] = vmd->dev->resource[VMD_MEMBAR2].start -
- readq(membar2 + 0x2010);
+ readq(membar2 + MB2_SHADOW_OFFSET + 8);
pci_iounmap(vmd->dev, membar2);
}
}
@@ -606,14 +611,14 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
pci_read_config_dword(vmd->dev, PCI_REG_VMCONFIG, &vmconfig);
if (BUS_RESTRICT_CAP(vmcap) &&
(BUS_RESTRICT_CFG(vmconfig) == 0x1))
- busn_start = 128;
+ vmd->busn_start = 128;
}
res = &vmd->dev->resource[VMD_CFGBAR];
vmd->resources[0] = (struct resource) {
.name = "VMD CFGBAR",
- .start = busn_start,
- .end = busn_start + (resource_size(res) >> 20) - 1,
+ .start = vmd->busn_start,
+ .end = vmd->busn_start + (resource_size(res) >> 20) - 1,
.flags = IORESOURCE_BUS | IORESOURCE_PCI_FIXED,
};
@@ -681,8 +686,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
pci_add_resource_offset(&resources, &vmd->resources[1], offset[0]);
pci_add_resource_offset(&resources, &vmd->resources[2], offset[1]);
- vmd->bus = pci_create_root_bus(&vmd->dev->dev, busn_start, &vmd_ops,
- sd, &resources);
+ vmd->bus = pci_create_root_bus(&vmd->dev->dev, vmd->busn_start,
+ &vmd_ops, sd, &resources);
if (!vmd->bus) {
pci_free_resource_list(&resources);
irq_domain_remove(vmd->irq_domain);