diff options
| author | Weinan Li <weinan.z.li@intel.com> | 2018-02-13 08:24:32 +0300 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2018-03-06 08:19:22 +0300 |
| commit | 64f46f55bb30aebf146ae3cd2c2a4e2a06bcea04 (patch) | |
| tree | 1201b32a9cbb4e0aabf0cc9b39ac67b730aadee1 /drivers/gpu/drm/i915/gvt/mmio_context.c | |
| parent | f9a651c05d7ae492185027f6acde25e2bc54edd9 (diff) | |
| download | linux-64f46f55bb30aebf146ae3cd2c2a4e2a06bcea04.tar.xz | |
drm/i915/gvt: add interface to check if context is inhibit
No functional change, just for easy to use.
v4:
- refine comment (Kevin)
Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/mmio_context.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/mmio_context.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/gvt/mmio_context.c b/drivers/gpu/drm/i915/gvt/mmio_context.c index ca4ba56fd60c..1bc1b28eb9e1 100644 --- a/drivers/gpu/drm/i915/gvt/mmio_context.c +++ b/drivers/gpu/drm/i915/gvt/mmio_context.c @@ -295,6 +295,16 @@ static void switch_mocs(struct intel_vgpu *pre, struct intel_vgpu *next, #define CTX_CONTEXT_CONTROL_VAL 0x03 +bool is_inhibit_context(struct i915_gem_context *ctx, int ring_id) +{ + u32 *reg_state = ctx->engine[ring_id].lrc_reg_state; + u32 inhibit_mask = + _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); + + return inhibit_mask == + (reg_state[CTX_CONTEXT_CONTROL_VAL] & inhibit_mask); +} + /* Switch ring mmio values (context). */ static void switch_mmio(struct intel_vgpu *pre, struct intel_vgpu *next, @@ -302,9 +312,6 @@ static void switch_mmio(struct intel_vgpu *pre, { struct drm_i915_private *dev_priv; struct intel_vgpu_submission *s; - u32 *reg_state, ctx_ctrl; - u32 inhibit_mask = - _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); struct engine_mmio *mmio; u32 old_v, new_v; @@ -329,16 +336,13 @@ static void switch_mmio(struct intel_vgpu *pre, // restore if (next) { s = &next->submission; - reg_state = - s->shadow_ctx->engine[ring_id].lrc_reg_state; - ctx_ctrl = reg_state[CTX_CONTEXT_CONTROL_VAL]; /* - * if it is an inhibit context, load in_context mmio - * into HW by mmio write. If it is not, skip this mmio - * write. + * No need to restore the mmio which is in context state + * image if it's not inhibit context, it will restore + * itself. */ if (mmio->in_context && - (ctx_ctrl & inhibit_mask) != inhibit_mask) + !is_inhibit_context(s->shadow_ctx, ring_id)) continue; if (mmio->mask) |