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path: root/drivers/gpu/drm/i915/gvt/scheduler.c
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Diffstat (limited to 'drivers/gpu/drm/i915/gvt/scheduler.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/scheduler.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index 13632dba8b2a..0f919f0a43d4 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -812,10 +812,31 @@ static void update_guest_context(struct intel_vgpu_workload *workload)
void *src;
unsigned long context_gpa, context_page_num;
int i;
+ struct drm_i915_private *dev_priv = gvt->dev_priv;
+ u32 ring_base;
+ u32 head, tail;
+ u16 wrap_count;
gvt_dbg_sched("ring id %d workload lrca %x\n", rq->engine->id,
workload->ctx_desc.lrca);
+ head = workload->rb_head;
+ tail = workload->rb_tail;
+ wrap_count = workload->guest_rb_head >> RB_HEAD_WRAP_CNT_OFF;
+
+ if (tail < head) {
+ if (wrap_count == RB_HEAD_WRAP_CNT_MAX)
+ wrap_count = 0;
+ else
+ wrap_count += 1;
+ }
+
+ head = (wrap_count << RB_HEAD_WRAP_CNT_OFF) | tail;
+
+ ring_base = dev_priv->engine[workload->ring_id]->mmio_base;
+ vgpu_vreg_t(vgpu, RING_TAIL(ring_base)) = tail;
+ vgpu_vreg_t(vgpu, RING_HEAD(ring_base)) = head;
+
context_page_num = rq->engine->context_size;
context_page_num = context_page_num >> PAGE_SHIFT;
@@ -1415,6 +1436,7 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id,
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
u64 ring_context_gpa;
u32 head, tail, start, ctl, ctx_ctl, per_ctx, indirect_ctx;
+ u32 guest_head;
int ret;
ring_context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm,
@@ -1430,6 +1452,8 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id,
intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(ring_tail.val), &tail, 4);
+ guest_head = head;
+
head &= RB_HEAD_OFF_MASK;
tail &= RB_TAIL_OFF_MASK;
@@ -1462,6 +1486,7 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id,
workload->ctx_desc = *desc;
workload->ring_context_gpa = ring_context_gpa;
workload->rb_head = head;
+ workload->guest_rb_head = guest_head;
workload->rb_tail = tail;
workload->rb_start = start;
workload->rb_ctl = ctl;