static void guc_init_ctx_desc(struct intel_guc *guc,
struct i915_guc_client *client)
{
+ struct intel_context *ctx = client->owner;
struct guc_context_desc desc;
struct sg_table *sg;
+ int i;
memset(&desc, 0, sizeof(desc));
desc.attribute = GUC_CTX_DESC_ATTR_ACTIVE | GUC_CTX_DESC_ATTR_KERNEL;
desc.context_id = client->ctx_index;
desc.priority = client->priority;
- desc.engines_used = (1 << RCS) | (1 << VCS) | (1 << BCS) |
- (1 << VECS) | (1 << VCS2); /* all engines */
desc.db_id = client->doorbell_id;
+ for (i = 0; i < I915_NUM_RINGS; i++) {
+ struct guc_execlist_context *lrc = &desc.lrc[i];
+ struct intel_ringbuffer *ringbuf = ctx->engine[i].ringbuf;
+ struct intel_engine_cs *ring;
+ struct drm_i915_gem_object *obj;
+ uint64_t ctx_desc;
+
+ /* TODO: We have a design issue to be solved here. Only when we
+ * receive the first batch, we know which engine is used by the
+ * user. But here GuC expects the lrc and ring to be pinned. It
+ * is not an issue for default context, which is the only one
+ * for now who owns a GuC client. But for future owner of GuC
+ * client, need to make sure lrc is pinned prior to enter here.
+ */
+ obj = ctx->engine[i].state;
+ if (!obj)
+ break; /* XXX: continue? */
+
+ ring = ringbuf->ring;
+ ctx_desc = intel_lr_context_descriptor(ctx, ring);
+ lrc->context_desc = (u32)ctx_desc;
+
+ /* The state page is after PPHWSP */
+ lrc->ring_lcra = i915_gem_obj_ggtt_offset(obj) +
+ LRC_STATE_PN * PAGE_SIZE;
+ lrc->context_id = (client->ctx_index << GUC_ELC_CTXID_OFFSET) |
+ (ring->id << GUC_ELC_ENGINE_OFFSET);
+
+ obj = ringbuf->obj;
+
+ lrc->ring_begin = i915_gem_obj_ggtt_offset(obj);
+ lrc->ring_end = lrc->ring_begin + obj->base.size - 1;
+ lrc->ring_next_free_location = lrc->ring_begin;
+ lrc->ring_current_tail_pointer_value = 0;
+
+ desc.engines_used |= (1 << ring->id);
+ }
+
+ WARN_ON(desc.engines_used == 0);
+
/*
* The CPU address is only needed at certain points, so kmap_atomic on
* demand instead of storing it in the ctx descriptor.
return 0;
}
+#define CTX_RING_BUFFER_START 0x08
+
+/* Update the ringbuffer pointer in a saved context image */
+static void lr_context_update(struct drm_i915_gem_request *rq)
+{
+ enum intel_ring_id ring_id = rq->ring->id;
+ struct drm_i915_gem_object *ctx_obj = rq->ctx->engine[ring_id].state;
+ struct drm_i915_gem_object *rb_obj = rq->ringbuf->obj;
+ struct page *page;
+ uint32_t *reg_state;
+
+ BUG_ON(!ctx_obj);
+ WARN_ON(!i915_gem_obj_is_pinned(ctx_obj));
+ WARN_ON(!i915_gem_obj_is_pinned(rb_obj));
+
+ page = i915_gem_object_get_page(ctx_obj, LRC_STATE_PN);
+ reg_state = kmap_atomic(page);
+
+ reg_state[CTX_RING_BUFFER_START+1] = i915_gem_obj_ggtt_offset(rb_obj);
+
+ kunmap_atomic(reg_state);
+}
+
/**
* i915_guc_submit() - Submit commands through GuC
* @client: the guc client where commands will go through
unsigned long flags;
int q_ret, b_ret;
+ /* Need this because of the deferred pin ctx and ring */
+ /* Shall we move this right after ring is pinned? */
+ lr_context_update(rq);
+
spin_lock_irqsave(&client->wq_lock, flags);
q_ret = guc_add_workqueue_item(client, rq);
* The kernel client to replace ExecList submission is created with
* NORMAL priority. Priority of a client for scheduler can be HIGH,
* while a preemption context can use CRITICAL.
+ * @ctx the context to own the client (we use the default render context)
*
* Return: An i915_guc_client object if success.
*/
static struct i915_guc_client *guc_client_alloc(struct drm_device *dev,
- uint32_t priority)
+ uint32_t priority,
+ struct intel_context *ctx)
{
struct i915_guc_client *client;
struct drm_i915_private *dev_priv = dev->dev_private;
client->doorbell_id = GUC_INVALID_DOORBELL_ID;
client->priority = priority;
+ client->owner = ctx;
client->guc = guc;
client->ctx_index = (uint32_t)ida_simple_get(&guc->ctx_ids, 0,
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_guc *guc = &dev_priv->guc;
+ struct intel_context *ctx = dev_priv->ring[RCS].default_context;
struct i915_guc_client *client;
/* client for execbuf submission */
- client = guc_client_alloc(dev, GUC_CTX_PRIORITY_KMD_NORMAL);
+ client = guc_client_alloc(dev, GUC_CTX_PRIORITY_KMD_NORMAL, ctx);
if (!client) {
DRM_ERROR("Failed to create execbuf guc_client\n");
return -ENOMEM;
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