diff options
| author | Yu Zhang <[email protected]> | 2015-02-10 19:05:49 +0800 |
|---|---|---|
| committer | Daniel Vetter <[email protected]> | 2015-02-13 23:28:23 +0100 |
| commit | eb82289a1f2373917aae02ff41a247741040f16b (patch) | |
| tree | 786294a9095b29a5e4e6d971bba7b8320f089797 | |
| parent | 5dda8fa356587832e5373498d8b973d66735762d (diff) | |
drm/i915: Partition the fence registers for vGPU in i915 driver
With Intel GVT-g, the fence registers are partitioned by multiple
vGPU instances in different VMs. Routine i915_gem_load() is modified
to reset the num_fence_regs, when the driver detects it's running in
a VM. Accesses to the fence registers from vGPU will be trapped and
remapped by the host side. And the allocated fence number is provided
in PV INFO page structure. By now, the value of fence number is fixed,
but in the future we can relax this limitation, to allocate the fence
registers dynamically from host side.
Signed-off-by: Yu Zhang <[email protected]>
Signed-off-by: Jike Song <[email protected]>
Signed-off-by: Eddie Dong <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 36f1093e3c63..323706cefedf 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -29,6 +29,7 @@ #include <drm/drm_vma_manager.h> #include <drm/i915_drm.h> #include "i915_drv.h" +#include "i915_vgpu.h" #include "i915_trace.h" #include "intel_drv.h" #include <linux/oom.h> @@ -4987,6 +4988,10 @@ i915_gem_load(struct drm_device *dev) else dev_priv->num_fence_regs = 8; + if (intel_vgpu_active(dev)) + dev_priv->num_fence_regs = + I915_READ(vgtif_reg(avail_rs.fence_num)); + /* Initialize fence registers to zero */ INIT_LIST_HEAD(&dev_priv->mm.fence_list); i915_gem_restore_fences(dev); |