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path: root/drivers/gpu/drm/i915/i915_vgpu.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_vgpu.c')
-rw-r--r--drivers/gpu/drm/i915/i915_vgpu.c35
1 files changed, 27 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
index 94d3992b599d..1a8f7c731126 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.c
+++ b/drivers/gpu/drm/i915/i915_vgpu.c
@@ -52,34 +52,53 @@
*/
/**
- * i915_check_vgpu - detect virtual GPU
+ * i915_detect_vgpu - detect virtual GPU
* @dev_priv: i915 device private
*
* This function is called at the initialization stage, to detect whether
* running on a vGPU.
*/
-void i915_check_vgpu(struct drm_i915_private *dev_priv)
+void i915_detect_vgpu(struct drm_i915_private *dev_priv)
{
- struct intel_uncore *uncore = &dev_priv->uncore;
+ struct pci_dev *pdev = dev_priv->drm.pdev;
u64 magic;
u16 version_major;
+ void __iomem *shared_area;
BUILD_BUG_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
- magic = __raw_uncore_read64(uncore, vgtif_reg(magic));
- if (magic != VGT_MAGIC)
+ /*
+ * This is called before we setup the main MMIO BAR mappings used via
+ * the uncore structure, so we need to access the BAR directly. Since
+ * we do not support VGT on older gens, return early so we don't have
+ * to consider differently numbered or sized MMIO bars
+ */
+ if (INTEL_GEN(dev_priv) < 6)
+ return;
+
+ shared_area = pci_iomap_range(pdev, 0, VGT_PVINFO_PAGE, VGT_PVINFO_SIZE);
+ if (!shared_area) {
+ DRM_ERROR("failed to map MMIO bar to check for VGT\n");
return;
+ }
+
+ magic = readq(shared_area + vgtif_offset(magic));
+ if (magic != VGT_MAGIC)
+ goto out;
- version_major = __raw_uncore_read16(uncore, vgtif_reg(version_major));
+ version_major = readw(shared_area + vgtif_offset(version_major));
if (version_major < VGT_VERSION_MAJOR) {
DRM_INFO("VGT interface version mismatch!\n");
- return;
+ goto out;
}
- dev_priv->vgpu.caps = __raw_uncore_read32(uncore, vgtif_reg(vgt_caps));
+ dev_priv->vgpu.caps = readl(shared_area + vgtif_offset(vgt_caps));
dev_priv->vgpu.active = true;
DRM_INFO("Virtual GPU for Intel GVT-g detected.\n");
+
+out:
+ pci_iounmap(pdev, shared_area);
}
bool intel_vgpu_has_full_ppgtt(struct drm_i915_private *dev_priv)