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25 #ifndef __I915_GEM_CONTEXT_H__
26 #define __I915_GEM_CONTEXT_H__
28 #include <linux/bitops.h>
29 #include <linux/list.h>
30 #include <linux/radix-tree.h>
39 struct drm_i915_private;
40 struct drm_i915_file_private;
46 #define DEFAULT_CONTEXT_HANDLE 0
49 * struct i915_gem_context - client state
51 * The struct i915_gem_context represents the combined view of the driver and
52 * logical hardware state for a particular client.
54 struct i915_gem_context {
55 /** i915: i915 device backpointer */
56 struct drm_i915_private *i915;
58 /** file_priv: owning file descriptor */
59 struct drm_i915_file_private *file_priv;
62 * @ppgtt: unique address space (GTT)
64 * In full-ppgtt mode, each context has its own address space ensuring
65 * complete seperation of one client from all others.
67 * In other modes, this is a NULL pointer with the expectation that
68 * the caller uses the shared global GTT.
70 struct i915_hw_ppgtt *ppgtt;
73 * @pid: process id of creator
75 * Note that who created the context may not be the principle user,
76 * as the context may be shared across a local socket. However,
77 * that should only affect the default context, all contexts created
78 * explicitly by the client are expected to be isolated.
83 * @name: arbitrary name
85 * A name is constructed for the context from the creator's process
86 * name, pid and user handle in order to uniquely identify the
87 * context in messages.
91 /** link: place with &drm_i915_private.context_list */
92 struct list_head link;
93 struct llist_node free_link;
96 * @ref: reference count
98 * A reference to a context is held by both the client who created it
99 * and on each request submitted to the hardware using the request
100 * (to ensure the hardware has access to the state until it has
101 * finished all pending writes). See i915_gem_context_get() and
102 * i915_gem_context_put() for access.
107 * @rcu: rcu_head for deferred freeing.
112 * @flags: small set of booleans
115 #define CONTEXT_NO_ZEROMAP BIT(0)
116 #define CONTEXT_NO_ERROR_CAPTURE 1
117 #define CONTEXT_CLOSED 2
118 #define CONTEXT_BANNABLE 3
119 #define CONTEXT_BANNED 4
120 #define CONTEXT_FORCE_SINGLE_SUBMISSION 5
123 * @hw_id: - unique identifier for the context
125 * The hardware needs to uniquely identify the context for a few
126 * functions like fault reporting, PASID, scheduling. The
127 * &drm_i915_private.context_hw_ida is used to assign a unqiue
128 * id for the lifetime of the context.
133 * @user_handle: userspace identifier
135 * A unique per-file identifier is generated from
136 * &drm_i915_file_private.contexts.
140 struct i915_sched_attr sched;
142 /** ggtt_offset_bias: placement restriction for context objects */
143 u32 ggtt_offset_bias;
145 /** engine: per-engine logical HW state */
146 struct intel_context {
147 struct i915_vma *state;
148 struct intel_ring *ring;
152 } __engine[I915_NUM_ENGINES];
154 /** ring_size: size for allocating the per-engine ring buffer */
156 /** desc_template: invariant fields for the HW context descriptor */
159 /** guilty_count: How many times this context has caused a GPU hang. */
160 atomic_t guilty_count;
162 * @active_count: How many times this context was active during a GPU
163 * hang, but did not cause it.
165 atomic_t active_count;
167 #define CONTEXT_SCORE_GUILTY 10
168 #define CONTEXT_SCORE_BAN_THRESHOLD 40
169 /** ban_score: Accumulated score of all hangs caused by this context. */
172 /** remap_slice: Bitmask of cache lines that need remapping */
175 /** handles_vma: rbtree to look up our context specific obj/vma for
176 * the user handle. (user handles are per fd, but the binding is
177 * per vm, which may be one per context or shared with the global GTT)
179 struct radix_tree_root handles_vma;
181 /** handles_list: reverse list of all the rbtree entries in use for
182 * this context, which allows us to free all the allocations on
185 struct list_head handles_list;
188 static inline bool i915_gem_context_is_closed(const struct i915_gem_context *ctx)
190 return test_bit(CONTEXT_CLOSED, &ctx->flags);
193 static inline void i915_gem_context_set_closed(struct i915_gem_context *ctx)
195 GEM_BUG_ON(i915_gem_context_is_closed(ctx));
196 __set_bit(CONTEXT_CLOSED, &ctx->flags);
199 static inline bool i915_gem_context_no_error_capture(const struct i915_gem_context *ctx)
201 return test_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
204 static inline void i915_gem_context_set_no_error_capture(struct i915_gem_context *ctx)
206 __set_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
209 static inline void i915_gem_context_clear_no_error_capture(struct i915_gem_context *ctx)
211 __clear_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
214 static inline bool i915_gem_context_is_bannable(const struct i915_gem_context *ctx)
216 return test_bit(CONTEXT_BANNABLE, &ctx->flags);
219 static inline void i915_gem_context_set_bannable(struct i915_gem_context *ctx)
221 __set_bit(CONTEXT_BANNABLE, &ctx->flags);
224 static inline void i915_gem_context_clear_bannable(struct i915_gem_context *ctx)
226 __clear_bit(CONTEXT_BANNABLE, &ctx->flags);
229 static inline bool i915_gem_context_is_banned(const struct i915_gem_context *ctx)
231 return test_bit(CONTEXT_BANNED, &ctx->flags);
234 static inline void i915_gem_context_set_banned(struct i915_gem_context *ctx)
236 __set_bit(CONTEXT_BANNED, &ctx->flags);
239 static inline bool i915_gem_context_force_single_submission(const struct i915_gem_context *ctx)
241 return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
244 static inline void i915_gem_context_set_force_single_submission(struct i915_gem_context *ctx)
246 __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
249 static inline bool i915_gem_context_is_default(const struct i915_gem_context *c)
251 return c->user_handle == DEFAULT_CONTEXT_HANDLE;
254 static inline bool i915_gem_context_is_kernel(struct i915_gem_context *ctx)
256 return !ctx->file_priv;
259 static inline struct intel_context *
260 to_intel_context(struct i915_gem_context *ctx,
261 const struct intel_engine_cs *engine)
263 return &ctx->__engine[engine->id];
266 static inline struct intel_ring *
267 intel_context_pin(struct i915_gem_context *ctx, struct intel_engine_cs *engine)
269 return engine->context_pin(engine, ctx);
272 static inline void __intel_context_pin(struct i915_gem_context *ctx,
273 const struct intel_engine_cs *engine)
275 struct intel_context *ce = to_intel_context(ctx, engine);
277 GEM_BUG_ON(!ce->pin_count);
281 static inline void intel_context_unpin(struct i915_gem_context *ctx,
282 struct intel_engine_cs *engine)
284 engine->context_unpin(engine, ctx);
287 /* i915_gem_context.c */
288 int __must_check i915_gem_contexts_init(struct drm_i915_private *dev_priv);
289 void i915_gem_contexts_lost(struct drm_i915_private *dev_priv);
290 void i915_gem_contexts_fini(struct drm_i915_private *dev_priv);
292 int i915_gem_context_open(struct drm_i915_private *i915,
293 struct drm_file *file);
294 void i915_gem_context_close(struct drm_file *file);
296 int i915_switch_context(struct i915_request *rq);
297 int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv);
299 void i915_gem_context_release(struct kref *ctx_ref);
300 struct i915_gem_context *
301 i915_gem_context_create_gvt(struct drm_device *dev);
303 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
304 struct drm_file *file);
305 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
306 struct drm_file *file);
307 int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
308 struct drm_file *file_priv);
309 int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
310 struct drm_file *file_priv);
311 int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
312 struct drm_file *file);
314 struct i915_gem_context *
315 i915_gem_context_create_kernel(struct drm_i915_private *i915, int prio);
317 static inline struct i915_gem_context *
318 i915_gem_context_get(struct i915_gem_context *ctx)
324 static inline void i915_gem_context_put(struct i915_gem_context *ctx)
326 kref_put(&ctx->ref, i915_gem_context_release);
329 #endif /* !__I915_GEM_CONTEXT_H__ */