diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/render.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/render.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gvt/render.c b/drivers/gpu/drm/i915/gvt/render.c index c6e7972ac21d..19d98c903672 100644 --- a/drivers/gpu/drm/i915/gvt/render.c +++ b/drivers/gpu/drm/i915/gvt/render.c @@ -260,7 +260,8 @@ static void restore_mocs(struct intel_vgpu *vgpu, int ring_id) #define CTX_CONTEXT_CONTROL_VAL 0x03 -void intel_gvt_load_render_mmio(struct intel_vgpu *vgpu, int ring_id) +/* Switch ring mmio values (context) from host to a vgpu. */ +static void switch_mmio_to_vgpu(struct intel_vgpu *vgpu, int ring_id) { struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; struct render_mmio *mmio; @@ -312,7 +313,8 @@ void intel_gvt_load_render_mmio(struct intel_vgpu *vgpu, int ring_id) handle_tlb_pending_event(vgpu, ring_id); } -void intel_gvt_restore_render_mmio(struct intel_vgpu *vgpu, int ring_id) +/* Switch ring mmio values (context) from vgpu to host. */ +static void switch_mmio_to_host(struct intel_vgpu *vgpu, int ring_id) { struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; struct render_mmio *mmio; @@ -348,3 +350,32 @@ void intel_gvt_restore_render_mmio(struct intel_vgpu *vgpu, int ring_id) mmio->value, v); } } + +/** + * intel_gvt_switch_render_mmio - switch mmio context of specific engine + * @pre: the last vGPU that own the engine + * @next: the vGPU to switch to + * @ring_id: specify the engine + * + * If pre is null indicates that host own the engine. If next is null + * indicates that we are switching to host workload. + */ +void intel_gvt_switch_mmio(struct intel_vgpu *pre, + struct intel_vgpu *next, int ring_id) +{ + if (WARN_ON(!pre && !next)) + return; + + gvt_dbg_render("switch ring %d from %s to %s\n", ring_id, + pre ? "vGPU" : "host", next ? "vGPU" : "HOST"); + + /** + * TODO: Optimize for vGPU to vGPU switch by merging + * switch_mmio_to_host() and switch_mmio_to_vgpu(). + */ + if (pre) + switch_mmio_to_host(pre, ring_id); + + if (next) + switch_mmio_to_vgpu(next, ring_id); +} |