diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 92 |
1 files changed, 63 insertions, 29 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 4be66f60504d..2e85fda94963 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -12,6 +12,7 @@ * workarounds! */ #define CACHELINE_BYTES 64 +#define CACHELINE_DWORDS (CACHELINE_BYTES / sizeof(uint32_t)) /* * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use" @@ -105,6 +106,9 @@ struct intel_ringbuffer { int space; int size; int effective_size; + int reserved_size; + int reserved_tail; + bool reserved_in_use; /** We track the position of the requests in the ring buffer, and * when each is retired we increment last_retired_head as the GPU @@ -120,6 +124,25 @@ struct intel_ringbuffer { struct intel_context; struct drm_i915_reg_descriptor; +/* + * we use a single page to load ctx workarounds so all of these + * values are referred in terms of dwords + * + * struct i915_wa_ctx_bb: + * offset: specifies batch starting position, also helpful in case + * if we want to have multiple batches at different offsets based on + * some criteria. It is not a requirement at the moment but provides + * an option for future use. + * size: size of the batch in DWORDS + */ +struct i915_ctx_workarounds { + struct i915_wa_ctx_bb { + u32 offset; + u32 size; + } indirect_ctx, per_ctx; + struct drm_i915_gem_object *obj; +}; + struct intel_engine_cs { const char *name; enum intel_ring_id { @@ -143,6 +166,7 @@ struct intel_engine_cs { struct i915_gem_batch_pool batch_pool; struct intel_hw_status_page status_page; + struct i915_ctx_workarounds wa_ctx; unsigned irq_refcount; /* protected by dev_priv->irq_lock */ u32 irq_enable_mask; /* bitmask to enable ring interrupt */ @@ -152,15 +176,14 @@ struct intel_engine_cs { int (*init_hw)(struct intel_engine_cs *ring); - int (*init_context)(struct intel_engine_cs *ring, - struct intel_context *ctx); + int (*init_context)(struct drm_i915_gem_request *req); void (*write_tail)(struct intel_engine_cs *ring, u32 value); - int __must_check (*flush)(struct intel_engine_cs *ring, + int __must_check (*flush)(struct drm_i915_gem_request *req, u32 invalidate_domains, u32 flush_domains); - int (*add_request)(struct intel_engine_cs *ring); + int (*add_request)(struct drm_i915_gem_request *req); /* Some chipsets are not quite as coherent as advertised and need * an expensive kick to force a true read of the up-to-date seqno. * However, the up-to-date seqno is not always required and the last @@ -171,11 +194,12 @@ struct intel_engine_cs { bool lazy_coherency); void (*set_seqno)(struct intel_engine_cs *ring, u32 seqno); - int (*dispatch_execbuffer)(struct intel_engine_cs *ring, + int (*dispatch_execbuffer)(struct drm_i915_gem_request *req, u64 offset, u32 length, unsigned dispatch_flags); #define I915_DISPATCH_SECURE 0x1 #define I915_DISPATCH_PINNED 0x2 +#define I915_DISPATCH_RS 0x4 void (*cleanup)(struct intel_engine_cs *ring); /* GEN8 signal/wait table - never trust comments! @@ -229,10 +253,10 @@ struct intel_engine_cs { }; /* AKA wait() */ - int (*sync_to)(struct intel_engine_cs *ring, - struct intel_engine_cs *to, + int (*sync_to)(struct drm_i915_gem_request *to_req, + struct intel_engine_cs *from, u32 seqno); - int (*signal)(struct intel_engine_cs *signaller, + int (*signal)(struct drm_i915_gem_request *signaller_req, /* num_dwords needed by caller */ unsigned int num_dwords); } semaphore; @@ -243,14 +267,11 @@ struct intel_engine_cs { struct list_head execlist_retired_req_list; u8 next_context_status_buffer; u32 irq_keep_mask; /* bitmask for interrupts that should not be masked */ - int (*emit_request)(struct intel_ringbuffer *ringbuf, - struct drm_i915_gem_request *request); - int (*emit_flush)(struct intel_ringbuffer *ringbuf, - struct intel_context *ctx, + int (*emit_request)(struct drm_i915_gem_request *request); + int (*emit_flush)(struct drm_i915_gem_request *request, u32 invalidate_domains, u32 flush_domains); - int (*emit_bb_start)(struct intel_ringbuffer *ringbuf, - struct intel_context *ctx, + int (*emit_bb_start)(struct drm_i915_gem_request *req, u64 offset, unsigned dispatch_flags); /** @@ -272,10 +293,6 @@ struct intel_engine_cs { struct list_head request_list; /** - * Do we have some not yet emitted requests outstanding? - */ - struct drm_i915_gem_request *outstanding_lazy_request; - /** * Seqno of request most recently submitted to request_list. * Used exclusively by hang checker to avoid grabbing lock while * inspecting request list. @@ -408,8 +425,8 @@ void intel_cleanup_ring_buffer(struct intel_engine_cs *ring); int intel_ring_alloc_request_extras(struct drm_i915_gem_request *request); -int __must_check intel_ring_begin(struct intel_engine_cs *ring, int n); -int __must_check intel_ring_cacheline_align(struct intel_engine_cs *ring); +int __must_check intel_ring_begin(struct drm_i915_gem_request *req, int n); +int __must_check intel_ring_cacheline_align(struct drm_i915_gem_request *req); static inline void intel_ring_emit(struct intel_engine_cs *ring, u32 data) { @@ -426,12 +443,11 @@ int __intel_ring_space(int head, int tail, int size); void intel_ring_update_space(struct intel_ringbuffer *ringbuf); int intel_ring_space(struct intel_ringbuffer *ringbuf); bool intel_ring_stopped(struct intel_engine_cs *ring); -void __intel_ring_advance(struct intel_engine_cs *ring); int __must_check intel_ring_idle(struct intel_engine_cs *ring); void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno); -int intel_ring_flush_all_caches(struct intel_engine_cs *ring); -int intel_ring_invalidate_all_caches(struct intel_engine_cs *ring); +int intel_ring_flush_all_caches(struct drm_i915_gem_request *req); +int intel_ring_invalidate_all_caches(struct drm_i915_gem_request *req); void intel_fini_pipe_control(struct intel_engine_cs *ring); int intel_init_pipe_control(struct intel_engine_cs *ring); @@ -451,11 +467,29 @@ static inline u32 intel_ring_get_tail(struct intel_ringbuffer *ringbuf) return ringbuf->tail; } -static inline struct drm_i915_gem_request * -intel_ring_get_request(struct intel_engine_cs *ring) -{ - BUG_ON(ring->outstanding_lazy_request == NULL); - return ring->outstanding_lazy_request; -} +/* + * Arbitrary size for largest possible 'add request' sequence. The code paths + * are complex and variable. Empirical measurement shows that the worst case + * is ILK at 136 words. Reserving too much is better than reserving too little + * as that allows for corner cases that might have been missed. So the figure + * has been rounded up to 160 words. + */ +#define MIN_SPACE_FOR_ADD_REQUEST 160 + +/* + * Reserve space in the ring to guarantee that the i915_add_request() call + * will always have sufficient room to do its stuff. The request creation + * code calls this automatically. + */ +void intel_ring_reserved_space_reserve(struct intel_ringbuffer *ringbuf, int size); +/* Cancel the reservation, e.g. because the request is being discarded. */ +void intel_ring_reserved_space_cancel(struct intel_ringbuffer *ringbuf); +/* Use the reserved space - for use by i915_add_request() only. */ +void intel_ring_reserved_space_use(struct intel_ringbuffer *ringbuf); +/* Finish with the reserved space - for use by i915_add_request() only. */ +void intel_ring_reserved_space_end(struct intel_ringbuffer *ringbuf); + +/* Legacy ringbuffer specific portion of reservation code: */ +int intel_ring_reserve_space(struct drm_i915_gem_request *request); #endif /* _INTEL_RINGBUFFER_H_ */ |
