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| author | Changbin Du <changbin.du@intel.com> | 2017-12-08 09:56:22 +0300 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2017-12-08 11:18:26 +0300 |
| commit | cf27b950346d5201c291c4e189ed1436a136ae4d (patch) | |
| tree | 768dc1324b3091c0352880b02465bc398e42d53e /drivers/gpu/drm/i915/gvt/render.c | |
| parent | 83164886e4559f87015a33780852a64cdd6e4e50 (diff) | |
| download | linux-cf27b950346d5201c291c4e189ed1436a136ae4d.tar.xz | |
drm/i915/gvt: Remove MMIO barrier in MMIO switch
After engine mmio switched, software still need write workload
submission registers. So we can remove the MMIO barriar in MMIO
switch.
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/render.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/render.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/gpu/drm/i915/gvt/render.c b/drivers/gpu/drm/i915/gvt/render.c index 3e675f81815f..4c8e1285c607 100644 --- a/drivers/gpu/drm/i915/gvt/render.c +++ b/drivers/gpu/drm/i915/gvt/render.c @@ -275,7 +275,6 @@ static void switch_mmio_to_vgpu(struct intel_vgpu *vgpu, int ring_id) u32 ctx_ctrl = reg_state[CTX_CONTEXT_CONTROL_VAL]; u32 inhibit_mask = _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); - i915_reg_t last_reg = _MMIO(0); struct engine_mmio *mmio; u32 v; @@ -305,17 +304,12 @@ static void switch_mmio_to_vgpu(struct intel_vgpu *vgpu, int ring_id) v = vgpu_vreg(vgpu, mmio->reg); I915_WRITE_FW(mmio->reg, v); - last_reg = mmio->reg; trace_render_mmio(vgpu->id, "load", i915_mmio_reg_offset(mmio->reg), mmio->value, v); } - /* Make sure the swiched MMIOs has taken effect. */ - if (likely(i915_mmio_reg_offset(last_reg))) - I915_READ_FW(last_reg); - handle_tlb_pending_event(vgpu, ring_id); } @@ -323,7 +317,6 @@ static void switch_mmio_to_vgpu(struct intel_vgpu *vgpu, int ring_id) static void switch_mmio_to_host(struct intel_vgpu *vgpu, int ring_id) { struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; - i915_reg_t last_reg = _MMIO(0); struct engine_mmio *mmio; u32 v; @@ -347,16 +340,11 @@ static void switch_mmio_to_host(struct intel_vgpu *vgpu, int ring_id) continue; I915_WRITE_FW(mmio->reg, v); - last_reg = mmio->reg; trace_render_mmio(vgpu->id, "restore", i915_mmio_reg_offset(mmio->reg), mmio->value, v); } - - /* Make sure the swiched MMIOs has taken effect. */ - if (likely(i915_mmio_reg_offset(last_reg))) - I915_READ_FW(last_reg); } /** |