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25 #ifndef _INTEL_GUC_SUBMISSION_H_
26 #define _INTEL_GUC_SUBMISSION_H_
28 #include <linux/spinlock.h>
31 #include "i915_selftest.h"
32 #include "intel_engine_types.h"
34 struct drm_i915_private;
37 * This structure primarily describes the GEM object shared with the GuC.
38 * The specs sometimes refer to this object as a "GuC context", but we use
39 * the term "client" to avoid confusion with hardware contexts. This
40 * GEM object is held for the entire lifetime of our interaction with
41 * the GuC, being allocated before the GuC is loaded with its firmware.
42 * Because there's no way to update the address used by the GuC after
43 * initialisation, the shared object must stay pinned into the GGTT as
44 * long as the GuC is in use. We also keep the first page (only) mapped
45 * into kernel address space, as it includes shared data that must be
46 * updated on every request submission.
48 * The single GEM object described here is actually made up of several
49 * separate areas, as far as the GuC is concerned. The first page (kept
50 * kmap'd) includes the "process descriptor" which holds sequence data for
51 * the doorbell, and one cacheline which actually *is* the doorbell; a
52 * write to this will "ring the doorbell" (i.e. send an interrupt to the
53 * GuC). The subsequent pages of the client object constitute the work
54 * queue (a circular array of work items), again described in the process
55 * descriptor. Work queue pages are mapped momentarily as required.
57 struct intel_guc_client {
60 struct i915_gem_context *owner;
61 struct intel_guc *guc;
63 /* bitmap of (host) engine ids */
70 unsigned long doorbell_offset;
72 /* Protects GuC client's WQ access */
74 /* Per-engine counts of GuC submissions */
75 u64 submissions[I915_NUM_ENGINES];
77 /* For testing purposes, use nop WQ items instead of real ones */
78 I915_SELFTEST_DECLARE(bool use_nop_wqi);
81 int intel_guc_submission_init(struct intel_guc *guc);
82 int intel_guc_submission_enable(struct intel_guc *guc);
83 void intel_guc_submission_disable(struct intel_guc *guc);
84 void intel_guc_submission_fini(struct intel_guc *guc);
85 int intel_guc_preempt_work_create(struct intel_guc *guc);
86 void intel_guc_preempt_work_destroy(struct intel_guc *guc);