disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/i915/i915_scheduler.h
..
..
@@ -8,65 +8,50 @@
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 #define _I915_SCHEDULER_H_
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 #include <linux/bitops.h>
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+#include <linux/list.h>
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+#include <linux/kernel.h>
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-#include <uapi/drm/i915_drm.h>
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+#include "i915_scheduler_types.h"
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-enum {
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-	I915_PRIORITY_MIN = I915_CONTEXT_MIN_USER_PRIORITY - 1,
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-	I915_PRIORITY_NORMAL = I915_CONTEXT_DEFAULT_PRIORITY,
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-	I915_PRIORITY_MAX = I915_CONTEXT_MAX_USER_PRIORITY + 1,
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+#define priolist_for_each_request(it, plist, idx) \
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+	for (idx = 0; idx < ARRAY_SIZE((plist)->requests); idx++) \
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+		list_for_each_entry(it, &(plist)->requests[idx], sched.link)
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-	I915_PRIORITY_INVALID = INT_MIN
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-};
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+#define priolist_for_each_request_consume(it, n, plist, idx) \
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+	for (; \
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+	     (plist)->used ? (idx = __ffs((plist)->used)), 1 : 0; \
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+	     (plist)->used &= ~BIT(idx)) \
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+		list_for_each_entry_safe(it, n, \
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+					 &(plist)->requests[idx], \
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+					 sched.link)
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-struct i915_sched_attr {
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-	/**
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-	 * @priority: execution and service priority
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-	 *
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-	 * All clients are equal, but some are more equal than others!
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-	 *
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-	 * Requests from a context with a greater (more positive) value of
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-	 * @priority will be executed before those with a lower @priority
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-	 * value, forming a simple QoS.
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-	 *
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-	 * The &drm_i915_private.kernel_context is assigned the lowest priority.
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-	 */
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-	int priority;
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-};
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+void i915_sched_node_init(struct i915_sched_node *node);
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+void i915_sched_node_reinit(struct i915_sched_node *node);
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-/*
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- * "People assume that time is a strict progression of cause to effect, but
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- * actually, from a nonlinear, non-subjective viewpoint, it's more like a big
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- * ball of wibbly-wobbly, timey-wimey ... stuff." -The Doctor, 2015
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- *
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- * Requests exist in a complex web of interdependencies. Each request
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- * has to wait for some other request to complete before it is ready to be run
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- * (e.g. we have to wait until the pixels have been rendering into a texture
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- * before we can copy from it). We track the readiness of a request in terms
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- * of fences, but we also need to keep the dependency tree for the lifetime
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- * of the request (beyond the life of an individual fence). We use the tree
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- * at various points to reorder the requests whilst keeping the requests
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- * in order with respect to their various dependencies.
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- *
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- * There is no active component to the "scheduler". As we know the dependency
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- * DAG of each request, we are able to insert it into a sorted queue when it
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- * is ready, and are able to reorder its portion of the graph to accommodate
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- * dynamic priority changes.
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- */
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-struct i915_sched_node {
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-	struct list_head signalers_list; /* those before us, we depend upon */
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-	struct list_head waiters_list; /* those after us, they depend upon us */
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-	struct list_head link;
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-	struct i915_sched_attr attr;
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-};
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+bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
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+				      struct i915_sched_node *signal,
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+				      struct i915_dependency *dep,
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+				      unsigned long flags);
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-struct i915_dependency {
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-	struct i915_sched_node *signaler;
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-	struct list_head signal_link;
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-	struct list_head wait_link;
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-	struct list_head dfs_link;
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-	unsigned long flags;
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-#define I915_DEPENDENCY_ALLOC BIT(0)
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-};
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+int i915_sched_node_add_dependency(struct i915_sched_node *node,
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+				   struct i915_sched_node *signal,
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+				   unsigned long flags);
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+
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+void i915_sched_node_fini(struct i915_sched_node *node);
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+
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+void i915_schedule(struct i915_request *request,
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+		   const struct i915_sched_attr *attr);
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+
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+void i915_schedule_bump_priority(struct i915_request *rq, unsigned int bump);
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+
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+struct list_head *
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+i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio);
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+
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+void __i915_priolist_free(struct i915_priolist *p);
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+static inline void i915_priolist_free(struct i915_priolist *p)
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+{
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+	if (p->priority != I915_PRIORITY_NORMAL)
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+		__i915_priolist_free(p);
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+}
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 #endif /* _I915_SCHEDULER_H_ */