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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.
141 * @priority: execution and service priority
143 * All clients are equal, but some are more equal than others!
145 * Requests from a context with a greater (more positive) value of
146 * @priority will be executed before those with a lower @priority
147 * value, forming a simple QoS.
149 * The &drm_i915_private.kernel_context is assigned the lowest priority.
153 /** ggtt_offset_bias: placement restriction for context objects */
154 u32 ggtt_offset_bias;
156 /** engine: per-engine logical HW state */
157 struct intel_context {
158 struct i915_vma *state;
159 struct intel_ring *ring;
163 } engine[I915_NUM_ENGINES];
165 /** ring_size: size for allocating the per-engine ring buffer */
167 /** desc_template: invariant fields for the HW context descriptor */
170 /** guilty_count: How many times this context has caused a GPU hang. */
171 atomic_t guilty_count;
173 * @active_count: How many times this context was active during a GPU
174 * hang, but did not cause it.
176 atomic_t active_count;
178 #define CONTEXT_SCORE_GUILTY 10
179 #define CONTEXT_SCORE_BAN_THRESHOLD 40
180 /** ban_score: Accumulated score of all hangs caused by this context. */
183 /** remap_slice: Bitmask of cache lines that need remapping */
186 /** handles_vma: rbtree to look up our context specific obj/vma for
187 * the user handle. (user handles are per fd, but the binding is
188 * per vm, which may be one per context or shared with the global GTT)
190 struct radix_tree_root handles_vma;
192 /** handles_list: reverse list of all the rbtree entries in use for
193 * this context, which allows us to free all the allocations on
196 struct list_head handles_list;
199 static inline bool i915_gem_context_is_closed(const struct i915_gem_context *ctx)
201 return test_bit(CONTEXT_CLOSED, &ctx->flags);
204 static inline void i915_gem_context_set_closed(struct i915_gem_context *ctx)
206 GEM_BUG_ON(i915_gem_context_is_closed(ctx));
207 __set_bit(CONTEXT_CLOSED, &ctx->flags);
210 static inline bool i915_gem_context_no_error_capture(const struct i915_gem_context *ctx)
212 return test_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
215 static inline void i915_gem_context_set_no_error_capture(struct i915_gem_context *ctx)
217 __set_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
220 static inline void i915_gem_context_clear_no_error_capture(struct i915_gem_context *ctx)
222 __clear_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
225 static inline bool i915_gem_context_is_bannable(const struct i915_gem_context *ctx)
227 return test_bit(CONTEXT_BANNABLE, &ctx->flags);
230 static inline void i915_gem_context_set_bannable(struct i915_gem_context *ctx)
232 __set_bit(CONTEXT_BANNABLE, &ctx->flags);
235 static inline void i915_gem_context_clear_bannable(struct i915_gem_context *ctx)
237 __clear_bit(CONTEXT_BANNABLE, &ctx->flags);
240 static inline bool i915_gem_context_is_banned(const struct i915_gem_context *ctx)
242 return test_bit(CONTEXT_BANNED, &ctx->flags);
245 static inline void i915_gem_context_set_banned(struct i915_gem_context *ctx)
247 __set_bit(CONTEXT_BANNED, &ctx->flags);
250 static inline bool i915_gem_context_force_single_submission(const struct i915_gem_context *ctx)
252 return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
255 static inline void i915_gem_context_set_force_single_submission(struct i915_gem_context *ctx)
257 __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
260 static inline bool i915_gem_context_is_default(const struct i915_gem_context *c)
262 return c->user_handle == DEFAULT_CONTEXT_HANDLE;
265 static inline bool i915_gem_context_is_kernel(struct i915_gem_context *ctx)
267 return !ctx->file_priv;
270 /* i915_gem_context.c */
271 int __must_check i915_gem_contexts_init(struct drm_i915_private *dev_priv);
272 void i915_gem_contexts_lost(struct drm_i915_private *dev_priv);
273 void i915_gem_contexts_fini(struct drm_i915_private *dev_priv);
275 int i915_gem_context_open(struct drm_i915_private *i915,
276 struct drm_file *file);
277 void i915_gem_context_close(struct drm_file *file);
279 int i915_switch_context(struct i915_request *rq);
280 int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv);
282 void i915_gem_context_release(struct kref *ctx_ref);
283 struct i915_gem_context *
284 i915_gem_context_create_gvt(struct drm_device *dev);
286 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
287 struct drm_file *file);
288 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
289 struct drm_file *file);
290 int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
291 struct drm_file *file_priv);
292 int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
293 struct drm_file *file_priv);
294 int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
295 struct drm_file *file);
297 struct i915_gem_context *
298 i915_gem_context_create_kernel(struct drm_i915_private *i915, int prio);
300 static inline struct i915_gem_context *
301 i915_gem_context_get(struct i915_gem_context *ctx)
307 static inline void i915_gem_context_put(struct i915_gem_context *ctx)
309 kref_put(&ctx->ref, i915_gem_context_release);
312 #endif /* !__I915_GEM_CONTEXT_H__ */