1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2019 Intel Corporation 4 */ 5 6 #ifndef __INTEL_CONTEXT_H__ 7 #define __INTEL_CONTEXT_H__ 8 9 #include <linux/bitops.h> 10 #include <linux/lockdep.h> 11 #include <linux/types.h> 12 13 #include "i915_active.h" 14 #include "i915_drv.h" 15 #include "intel_context_types.h" 16 #include "intel_engine_types.h" 17 #include "intel_ring_types.h" 18 #include "intel_timeline_types.h" 19 #include "i915_trace.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 void i915_context_module_exit(void); 35 int i915_context_module_init(void); 36 37 struct intel_context * 38 intel_context_create(struct intel_engine_cs *engine); 39 40 int intel_context_alloc_state(struct intel_context *ce); 41 42 void intel_context_free(struct intel_context *ce); 43 44 int intel_context_reconfigure_sseu(struct intel_context *ce, 45 const struct intel_sseu sseu); 46 47 /** 48 * intel_context_lock_pinned - Stablises the 'pinned' status of the HW context 49 * @ce - the context 50 * 51 * Acquire a lock on the pinned status of the HW context, such that the context 52 * can neither be bound to the GPU or unbound whilst the lock is held, i.e. 53 * intel_context_is_pinned() remains stable. 54 */ 55 static inline int intel_context_lock_pinned(struct intel_context *ce) 56 __acquires(ce->pin_mutex) 57 { 58 return mutex_lock_interruptible(&ce->pin_mutex); 59 } 60 61 /** 62 * intel_context_is_pinned - Reports the 'pinned' status 63 * @ce - the context 64 * 65 * While in use by the GPU, the context, along with its ring and page 66 * tables is pinned into memory and the GTT. 67 * 68 * Returns: true if the context is currently pinned for use by the GPU. 69 */ 70 static inline bool 71 intel_context_is_pinned(struct intel_context *ce) 72 { 73 return atomic_read(&ce->pin_count); 74 } 75 76 static inline void intel_context_cancel_request(struct intel_context *ce, 77 struct i915_request *rq) 78 { 79 GEM_BUG_ON(!ce->ops->cancel_request); 80 return ce->ops->cancel_request(ce, rq); 81 } 82 83 /** 84 * intel_context_unlock_pinned - Releases the earlier locking of 'pinned' status 85 * @ce - the context 86 * 87 * Releases the lock earlier acquired by intel_context_unlock_pinned(). 88 */ 89 static inline void intel_context_unlock_pinned(struct intel_context *ce) 90 __releases(ce->pin_mutex) 91 { 92 mutex_unlock(&ce->pin_mutex); 93 } 94 95 int __intel_context_do_pin(struct intel_context *ce); 96 int __intel_context_do_pin_ww(struct intel_context *ce, 97 struct i915_gem_ww_ctx *ww); 98 99 static inline bool intel_context_pin_if_active(struct intel_context *ce) 100 { 101 return atomic_inc_not_zero(&ce->pin_count); 102 } 103 104 static inline int intel_context_pin(struct intel_context *ce) 105 { 106 if (likely(intel_context_pin_if_active(ce))) 107 return 0; 108 109 return __intel_context_do_pin(ce); 110 } 111 112 static inline int intel_context_pin_ww(struct intel_context *ce, 113 struct i915_gem_ww_ctx *ww) 114 { 115 if (likely(intel_context_pin_if_active(ce))) 116 return 0; 117 118 return __intel_context_do_pin_ww(ce, ww); 119 } 120 121 static inline void __intel_context_pin(struct intel_context *ce) 122 { 123 GEM_BUG_ON(!intel_context_is_pinned(ce)); 124 atomic_inc(&ce->pin_count); 125 } 126 127 void __intel_context_do_unpin(struct intel_context *ce, int sub); 128 129 static inline void intel_context_sched_disable_unpin(struct intel_context *ce) 130 { 131 __intel_context_do_unpin(ce, 2); 132 } 133 134 static inline void intel_context_unpin(struct intel_context *ce) 135 { 136 if (!ce->ops->sched_disable) { 137 __intel_context_do_unpin(ce, 1); 138 } else { 139 /* 140 * Move ownership of this pin to the scheduling disable which is 141 * an async operation. When that operation completes the above 142 * intel_context_sched_disable_unpin is called potentially 143 * unpinning the context. 144 */ 145 while (!atomic_add_unless(&ce->pin_count, -1, 1)) { 146 if (atomic_cmpxchg(&ce->pin_count, 1, 2) == 1) { 147 ce->ops->sched_disable(ce); 148 break; 149 } 150 } 151 } 152 } 153 154 void intel_context_enter_engine(struct intel_context *ce); 155 void intel_context_exit_engine(struct intel_context *ce); 156 157 static inline void intel_context_enter(struct intel_context *ce) 158 { 159 lockdep_assert_held(&ce->timeline->mutex); 160 if (!ce->active_count++) 161 ce->ops->enter(ce); 162 } 163 164 static inline void intel_context_mark_active(struct intel_context *ce) 165 { 166 lockdep_assert_held(&ce->timeline->mutex); 167 ++ce->active_count; 168 } 169 170 static inline void intel_context_exit(struct intel_context *ce) 171 { 172 lockdep_assert_held(&ce->timeline->mutex); 173 GEM_BUG_ON(!ce->active_count); 174 if (!--ce->active_count) 175 ce->ops->exit(ce); 176 } 177 178 static inline struct intel_context *intel_context_get(struct intel_context *ce) 179 { 180 kref_get(&ce->ref); 181 return ce; 182 } 183 184 static inline void intel_context_put(struct intel_context *ce) 185 { 186 kref_put(&ce->ref, ce->ops->destroy); 187 } 188 189 static inline struct intel_timeline *__must_check 190 intel_context_timeline_lock(struct intel_context *ce) 191 __acquires(&ce->timeline->mutex) 192 { 193 struct intel_timeline *tl = ce->timeline; 194 int err; 195 196 err = mutex_lock_interruptible(&tl->mutex); 197 if (err) 198 return ERR_PTR(err); 199 200 return tl; 201 } 202 203 static inline void intel_context_timeline_unlock(struct intel_timeline *tl) 204 __releases(&tl->mutex) 205 { 206 mutex_unlock(&tl->mutex); 207 } 208 209 int intel_context_prepare_remote_request(struct intel_context *ce, 210 struct i915_request *rq); 211 212 struct i915_request *intel_context_create_request(struct intel_context *ce); 213 214 struct i915_request * 215 intel_context_find_active_request(struct intel_context *ce); 216 217 static inline bool intel_context_is_barrier(const struct intel_context *ce) 218 { 219 return test_bit(CONTEXT_BARRIER_BIT, &ce->flags); 220 } 221 222 static inline bool intel_context_is_closed(const struct intel_context *ce) 223 { 224 return test_bit(CONTEXT_CLOSED_BIT, &ce->flags); 225 } 226 227 static inline bool intel_context_has_inflight(const struct intel_context *ce) 228 { 229 return test_bit(COPS_HAS_INFLIGHT_BIT, &ce->ops->flags); 230 } 231 232 static inline bool intel_context_use_semaphores(const struct intel_context *ce) 233 { 234 return test_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 235 } 236 237 static inline void intel_context_set_use_semaphores(struct intel_context *ce) 238 { 239 set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 240 } 241 242 static inline void intel_context_clear_use_semaphores(struct intel_context *ce) 243 { 244 clear_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 245 } 246 247 static inline bool intel_context_is_banned(const struct intel_context *ce) 248 { 249 return test_bit(CONTEXT_BANNED, &ce->flags); 250 } 251 252 static inline bool intel_context_set_banned(struct intel_context *ce) 253 { 254 return test_and_set_bit(CONTEXT_BANNED, &ce->flags); 255 } 256 257 static inline bool intel_context_ban(struct intel_context *ce, 258 struct i915_request *rq) 259 { 260 bool ret = intel_context_set_banned(ce); 261 262 trace_intel_context_ban(ce); 263 if (ce->ops->ban) 264 ce->ops->ban(ce, rq); 265 266 return ret; 267 } 268 269 static inline bool 270 intel_context_force_single_submission(const struct intel_context *ce) 271 { 272 return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags); 273 } 274 275 static inline void 276 intel_context_set_single_submission(struct intel_context *ce) 277 { 278 __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags); 279 } 280 281 static inline bool 282 intel_context_nopreempt(const struct intel_context *ce) 283 { 284 return test_bit(CONTEXT_NOPREEMPT, &ce->flags); 285 } 286 287 static inline void 288 intel_context_set_nopreempt(struct intel_context *ce) 289 { 290 set_bit(CONTEXT_NOPREEMPT, &ce->flags); 291 } 292 293 static inline void 294 intel_context_clear_nopreempt(struct intel_context *ce) 295 { 296 clear_bit(CONTEXT_NOPREEMPT, &ce->flags); 297 } 298 299 static inline u64 intel_context_get_total_runtime_ns(struct intel_context *ce) 300 { 301 const u32 period = ce->engine->gt->clock_period_ns; 302 303 return READ_ONCE(ce->runtime.total) * period; 304 } 305 306 static inline u64 intel_context_get_avg_runtime_ns(struct intel_context *ce) 307 { 308 const u32 period = ce->engine->gt->clock_period_ns; 309 310 return mul_u32_u32(ewma_runtime_read(&ce->runtime.avg), period); 311 } 312 313 #endif /* __INTEL_CONTEXT_H__ */ 314