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_has_inflight(const struct intel_context *ce) 195 { 196 return test_bit(COPS_HAS_INFLIGHT_BIT, &ce->ops->flags); 197 } 198 199 static inline bool intel_context_use_semaphores(const struct intel_context *ce) 200 { 201 return test_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 202 } 203 204 static inline void intel_context_set_use_semaphores(struct intel_context *ce) 205 { 206 set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 207 } 208 209 static inline void intel_context_clear_use_semaphores(struct intel_context *ce) 210 { 211 clear_bit(CONTEXT_USE_SEMAPHORES, &ce->flags); 212 } 213 214 static inline bool intel_context_is_banned(const struct intel_context *ce) 215 { 216 return test_bit(CONTEXT_BANNED, &ce->flags); 217 } 218 219 static inline bool intel_context_set_banned(struct intel_context *ce) 220 { 221 return test_and_set_bit(CONTEXT_BANNED, &ce->flags); 222 } 223 224 static inline bool 225 intel_context_force_single_submission(const struct intel_context *ce) 226 { 227 return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags); 228 } 229 230 static inline void 231 intel_context_set_single_submission(struct intel_context *ce) 232 { 233 __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags); 234 } 235 236 static inline bool 237 intel_context_nopreempt(const struct intel_context *ce) 238 { 239 return test_bit(CONTEXT_NOPREEMPT, &ce->flags); 240 } 241 242 static inline void 243 intel_context_set_nopreempt(struct intel_context *ce) 244 { 245 set_bit(CONTEXT_NOPREEMPT, &ce->flags); 246 } 247 248 static inline void 249 intel_context_clear_nopreempt(struct intel_context *ce) 250 { 251 clear_bit(CONTEXT_NOPREEMPT, &ce->flags); 252 } 253 254 static inline u64 intel_context_get_total_runtime_ns(struct intel_context *ce) 255 { 256 const u32 period = ce->engine->gt->clock_period_ns; 257 258 return READ_ONCE(ce->runtime.total) * period; 259 } 260 261 static inline u64 intel_context_get_avg_runtime_ns(struct intel_context *ce) 262 { 263 const u32 period = ce->engine->gt->clock_period_ns; 264 265 return mul_u32_u32(ewma_runtime_read(&ce->runtime.avg), period); 266 } 267 268 #endif /* __INTEL_CONTEXT_H__ */ 269