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