diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vgpu.c | 1 |
3 files changed, 9 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 1d725e0bba40..772154e4073e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -961,6 +961,7 @@ struct i915_frontbuffer_tracking { }; struct i915_virtual_gpu { + struct mutex lock; /* serialises sending of g2v_notify command pkts */ bool active; u32 caps; }; diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 0b81e0b64393..b1a7a8b9b46a 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -827,10 +827,9 @@ static void mark_tlbs_dirty(struct i915_ppgtt *ppgtt) ppgtt->pd_dirty_engines = ALL_ENGINES; } -static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create) +static void gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create) { - struct i915_address_space *vm = &ppgtt->vm; - struct drm_i915_private *dev_priv = vm->i915; + struct drm_i915_private *dev_priv = ppgtt->vm.i915; enum vgt_g2v_type msg; int i; @@ -839,7 +838,9 @@ static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create) else atomic_dec(px_used(ppgtt->pd)); - if (i915_vm_is_4lvl(vm)) { + mutex_lock(&dev_priv->vgpu.lock); + + if (i915_vm_is_4lvl(&ppgtt->vm)) { const u64 daddr = px_dma(ppgtt->pd); I915_WRITE(vgtif_reg(pdp[0].lo), lower_32_bits(daddr)); @@ -859,9 +860,10 @@ static int gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create) VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY); } + /* g2v_notify atomically (via hv trap) consumes the message packet. */ I915_WRITE(vgtif_reg(g2v_notify), msg); - return 0; + mutex_unlock(&dev_priv->vgpu.lock); } /* Index shifts into the pagetable are offset by GEN8_PTE_SHIFT [12] */ diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c index 39bebf16edbe..968be26735c5 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.c +++ b/drivers/gpu/drm/i915/i915_vgpu.c @@ -94,6 +94,7 @@ void i915_detect_vgpu(struct drm_i915_private *dev_priv) dev_priv->vgpu.caps = readl(shared_area + vgtif_offset(vgt_caps)); dev_priv->vgpu.active = true; + mutex_init(&dev_priv->vgpu.lock); DRM_INFO("Virtual GPU for Intel GVT-g detected.\n"); out: |