drivers/gpu/drm/i915/gt/intel_context.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2019 Intel Corporation
   5  */
   6
   7 #ifndef __INTEL_CONTEXT_H__
   8 #define __INTEL_CONTEXT_H__
   9
  10 #include <linux/bitops.h>
  11 #include <linux/lockdep.h>
  12 #include <linux/types.h>
  13
  14 #include "i915_active.h"
  15 #include "i915_drv.h"
  16 #include "intel_context_types.h"
  17 #include "intel_engine_types.h"
  18 #include "intel_ring_types.h"
  19 #include "intel_timeline_types.h"
  20
  21 #define CE_TRACE(ce, fmt, ...) do {                                     \
  22         const struct intel_context *ce__ = (ce);                        \
  23         ENGINE_TRACE(ce__->engine, "context:%llx " fmt,                 \
  24                      ce__->timeline->fence_context,                     \
  25                      ##__VA_ARGS__);                                    \
  26 } while (0)
  27
  28 struct i915_gem_ww_ctx;
  29
  30 void intel_context_init(struct intel_context *ce,
  31                         struct intel_engine_cs *engine);
  32 void intel_context_fini(struct intel_context *ce);
  33
  34 struct intel_context *
  35 intel_context_create(struct intel_engine_cs *engine);
  36
  37 int intel_context_alloc_state(struct intel_context *ce);
  38
  39 void intel_context_free(struct intel_context *ce);
  40
  41 int intel_context_reconfigure_sseu(struct intel_context *ce,
  42                                    const struct intel_sseu sseu);
  43
  44 /**
  45  * intel_context_lock_pinned - Stablises the 'pinned' status of the HW context
  46  * @ce - the context
  47  *
  48  * Acquire a lock on the pinned status of the HW context, such that the context
  49  * can neither be bound to the GPU or unbound whilst the lock is held, i.e.
  50  * intel_context_is_pinned() remains stable.
  51  */
  52 static inline int intel_context_lock_pinned(struct intel_context *ce)
  53         __acquires(ce->pin_mutex)
  54 {
  55         return mutex_lock_interruptible(&ce->pin_mutex);
  56 }
  57
  58 /**
  59  * intel_context_is_pinned - Reports the 'pinned' status
  60  * @ce - the context
  61  *
  62  * While in use by the GPU, the context, along with its ring and page
  63  * tables is pinned into memory and the GTT.
  64  *
  65  * Returns: true if the context is currently pinned for use by the GPU.
  66  */
  67 static inline bool
  68 intel_context_is_pinned(struct intel_context *ce)
  69 {
  70         return atomic_read(&ce->pin_count);
  71 }
  72
  73 /**
  74  * intel_context_unlock_pinned - Releases the earlier locking of 'pinned' status
  75  * @ce - the context
  76  *
  77  * Releases the lock earlier acquired by intel_context_unlock_pinned().
  78  */
  79 static inline void intel_context_unlock_pinned(struct intel_context *ce)
  80         __releases(ce->pin_mutex)
  81 {
  82         mutex_unlock(&ce->pin_mutex);
  83 }
  84
  85 int __intel_context_do_pin(struct intel_context *ce);
  86 int __intel_context_do_pin_ww(struct intel_context *ce,
  87                               struct i915_gem_ww_ctx *ww);
  88
  89 static inline bool intel_context_pin_if_active(struct intel_context *ce)
  90 {
  91         return atomic_inc_not_zero(&ce->pin_count);
  92 }
  93
  94 static inline int intel_context_pin(struct intel_context *ce)
  95 {
  96         if (likely(intel_context_pin_if_active(ce)))
  97                 return 0;
  98
  99         return __intel_context_do_pin(ce);
 100 }
 101
 102 static inline int intel_context_pin_ww(struct intel_context *ce,
 103                                        struct i915_gem_ww_ctx *ww)
 104 {
 105         if (likely(intel_context_pin_if_active(ce)))
 106                 return 0;
 107
 108         return __intel_context_do_pin_ww(ce, ww);
 109 }
 110
 111 static inline void __intel_context_pin(struct intel_context *ce)
 112 {
 113         GEM_BUG_ON(!intel_context_is_pinned(ce));
 114         atomic_inc(&ce->pin_count);
 115 }
 116
 117 void intel_context_unpin(struct intel_context *ce);
 118
 119 void intel_context_enter_engine(struct intel_context *ce);
 120 void intel_context_exit_engine(struct intel_context *ce);
 121
 122 static inline void intel_context_enter(struct intel_context *ce)
 123 {
 124         lockdep_assert_held(&ce->timeline->mutex);
 125         if (!ce->active_count++)
 126                 ce->ops->enter(ce);
 127 }
 128
 129 static inline void intel_context_mark_active(struct intel_context *ce)
 130 {
 131         lockdep_assert_held(&ce->timeline->mutex);
 132         ++ce->active_count;
 133 }
 134
 135 static inline void intel_context_exit(struct intel_context *ce)
 136 {
 137         lockdep_assert_held(&ce->timeline->mutex);
 138         GEM_BUG_ON(!ce->active_count);
 139         if (!--ce->active_count)
 140                 ce->ops->exit(ce);
 141 }
 142
 143 static inline struct intel_context *intel_context_get(struct intel_context *ce)
 144 {
 145         kref_get(&ce->ref);
 146         return ce;
 147 }
 148
 149 static inline void intel_context_put(struct intel_context *ce)
 150 {
 151         kref_put(&ce->ref, ce->ops->destroy);
 152 }
 153
 154 static inline struct intel_timeline *__must_check
 155 intel_context_timeline_lock(struct intel_context *ce)
 156         __acquires(&ce->timeline->mutex)
 157 {
 158         struct intel_timeline *tl = ce->timeline;
 159         int err;
 160
 161         err = mutex_lock_interruptible(&tl->mutex);
 162         if (err)
 163                 return ERR_PTR(err);
 164
 165         return tl;
 166 }
 167
 168 static inline void intel_context_timeline_unlock(struct intel_timeline *tl)
 169         __releases(&tl->mutex)
 170 {
 171         mutex_unlock(&tl->mutex);
 172 }
 173
 174 int intel_context_prepare_remote_request(struct intel_context *ce,
 175                                          struct i915_request *rq);
 176
 177 struct i915_request *intel_context_create_request(struct intel_context *ce);
 178
 179 static inline struct intel_ring *__intel_context_ring_size(u64 sz)
 180 {
 181         return u64_to_ptr(struct intel_ring, sz);
 182 }
 183
 184 static inline bool intel_context_is_barrier(const struct intel_context *ce)
 185 {
 186         return test_bit(CONTEXT_BARRIER_BIT, &ce->flags);
 187 }
 188
 189 static inline bool intel_context_is_closed(const struct intel_context *ce)
 190 {
 191         return test_bit(CONTEXT_CLOSED_BIT, &ce->flags);
 192 }
 193
 194 static inline bool intel_context_use_semaphores(const struct intel_context *ce)
 195 {
 196         return test_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
 197 }
 198
 199 static inline void intel_context_set_use_semaphores(struct intel_context *ce)
 200 {
 201         set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
 202 }
 203
 204 static inline void intel_context_clear_use_semaphores(struct intel_context *ce)
 205 {
 206         clear_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
 207 }
 208
 209 static inline bool intel_context_is_banned(const struct intel_context *ce)
 210 {
 211         return test_bit(CONTEXT_BANNED, &ce->flags);
 212 }
 213
 214 static inline bool intel_context_set_banned(struct intel_context *ce)
 215 {
 216         return test_and_set_bit(CONTEXT_BANNED, &ce->flags);
 217 }
 218
 219 static inline bool
 220 intel_context_force_single_submission(const struct intel_context *ce)
 221 {
 222         return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
 223 }
 224
 225 static inline void
 226 intel_context_set_single_submission(struct intel_context *ce)
 227 {
 228         __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
 229 }
 230
 231 static inline bool
 232 intel_context_nopreempt(const struct intel_context *ce)
 233 {
 234         return test_bit(CONTEXT_NOPREEMPT, &ce->flags);
 235 }
 236
 237 static inline void
 238 intel_context_set_nopreempt(struct intel_context *ce)
 239 {
 240         set_bit(CONTEXT_NOPREEMPT, &ce->flags);
 241 }
 242
 243 static inline void
 244 intel_context_clear_nopreempt(struct intel_context *ce)
 245 {
 246         clear_bit(CONTEXT_NOPREEMPT, &ce->flags);
 247 }
 248
 249 static inline u64 intel_context_get_total_runtime_ns(struct intel_context *ce)
 250 {
 251         const u32 period =
 252                 RUNTIME_INFO(ce->engine->i915)->cs_timestamp_period_ns;
 253
 254         return READ_ONCE(ce->runtime.total) * period;
 255 }
 256
 257 static inline u64 intel_context_get_avg_runtime_ns(struct intel_context *ce)
 258 {
 259         const u32 period =
 260                 RUNTIME_INFO(ce->engine->i915)->cs_timestamp_period_ns;
 261
 262         return mul_u32_u32(ewma_runtime_read(&ce->runtime.avg), period);
 263 }
 264
 265 #endif /* __INTEL_CONTEXT_H__ */