drivers/gpu/drm/i915/i915_priolist_types.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #ifndef _I915_PRIOLIST_TYPES_H_
   8 #define _I915_PRIOLIST_TYPES_H_
   9
  10 #include <linux/list.h>
  11 #include <linux/rbtree.h>
  12
  13 #include <uapi/drm/i915_drm.h>
  14
  15 enum {
  16         I915_PRIORITY_MIN = I915_CONTEXT_MIN_USER_PRIORITY - 1,
  17         I915_PRIORITY_NORMAL = I915_CONTEXT_DEFAULT_PRIORITY,
  18         I915_PRIORITY_MAX = I915_CONTEXT_MAX_USER_PRIORITY + 1,
  19
  20         /* A preemptive pulse used to monitor the health of each engine */
  21         I915_PRIORITY_HEARTBEAT,
  22
  23         /* Interactive workload, scheduled for immediate pageflipping */
  24         I915_PRIORITY_DISPLAY,
  25 };
  26
  27 #define I915_USER_PRIORITY_SHIFT 2
  28 #define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT)
  29
  30 #define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT)
  31 #define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1)
  32
  33 #define I915_PRIORITY_WAIT              ((u8)BIT(0))
  34 #define I915_PRIORITY_NOSEMAPHORE       ((u8)BIT(1))
  35
  36 /* Smallest priority value that cannot be bumped. */
  37 #define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK)
  38
  39 /*
  40  * Requests containing performance queries must not be preempted by
  41  * another context. They get scheduled with their default priority and
  42  * once they reach the execlist ports we ensure that they stick on the
  43  * HW until finished by pretending that they have maximum priority,
  44  * i.e. nothing can have higher priority and force us to usurp the
  45  * active request.
  46  */
  47 #define I915_PRIORITY_UNPREEMPTABLE INT_MAX
  48 #define I915_PRIORITY_BARRIER INT_MAX
  49
  50 #define __NO_PREEMPTION (I915_PRIORITY_WAIT)
  51
  52 struct i915_priolist {
  53         struct list_head requests[I915_PRIORITY_COUNT];
  54         struct rb_node node;
  55         unsigned long used;
  56         int priority;
  57 };
  58
  59 #endif /* _I915_PRIOLIST_TYPES_H_ */