1 #ifndef _INTEL_RINGBUFFER_H_
2 #define _INTEL_RINGBUFFER_H_
4 #include <linux/hashtable.h>
5 #include "i915_gem_batch_pool.h"
6 #include "i915_gem_request.h"
7 #include "i915_gem_timeline.h"
8 #include "i915_selftest.h"
10 #define I915_CMD_HASH_ORDER 9
12 /* Early gen2 devices have a cacheline of just 32 bytes, using 64 is overkill,
13 * but keeps the logic simple. Indeed, the whole purpose of this macro is just
14 * to give some inclination as to some of the magic values used in the various
17 #define CACHELINE_BYTES 64
18 #define CACHELINE_DWORDS (CACHELINE_BYTES / sizeof(uint32_t))
21 * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use"
22 * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use"
23 * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use"
25 * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same
26 * cacheline, the Head Pointer must not be greater than the Tail
29 #define I915_RING_FREE_SPACE 64
31 struct intel_hw_status_page {
37 #define I915_READ_TAIL(engine) I915_READ(RING_TAIL((engine)->mmio_base))
38 #define I915_WRITE_TAIL(engine, val) I915_WRITE(RING_TAIL((engine)->mmio_base), val)
40 #define I915_READ_START(engine) I915_READ(RING_START((engine)->mmio_base))
41 #define I915_WRITE_START(engine, val) I915_WRITE(RING_START((engine)->mmio_base), val)
43 #define I915_READ_HEAD(engine) I915_READ(RING_HEAD((engine)->mmio_base))
44 #define I915_WRITE_HEAD(engine, val) I915_WRITE(RING_HEAD((engine)->mmio_base), val)
46 #define I915_READ_CTL(engine) I915_READ(RING_CTL((engine)->mmio_base))
47 #define I915_WRITE_CTL(engine, val) I915_WRITE(RING_CTL((engine)->mmio_base), val)
49 #define I915_READ_IMR(engine) I915_READ(RING_IMR((engine)->mmio_base))
50 #define I915_WRITE_IMR(engine, val) I915_WRITE(RING_IMR((engine)->mmio_base), val)
52 #define I915_READ_MODE(engine) I915_READ(RING_MI_MODE((engine)->mmio_base))
53 #define I915_WRITE_MODE(engine, val) I915_WRITE(RING_MI_MODE((engine)->mmio_base), val)
55 /* seqno size is actually only a uint32, but since we plan to use MI_FLUSH_DW to
56 * do the writes, and that must have qw aligned offsets, simply pretend it's 8b.
58 #define gen8_semaphore_seqno_size sizeof(uint64_t)
59 #define GEN8_SEMAPHORE_OFFSET(__from, __to) \
60 (((__from) * I915_NUM_ENGINES + (__to)) * gen8_semaphore_seqno_size)
61 #define GEN8_SIGNAL_OFFSET(__ring, to) \
62 (dev_priv->semaphore->node.start + \
63 GEN8_SEMAPHORE_OFFSET((__ring)->id, (to)))
64 #define GEN8_WAIT_OFFSET(__ring, from) \
65 (dev_priv->semaphore->node.start + \
66 GEN8_SEMAPHORE_OFFSET(from, (__ring)->id))
68 enum intel_engine_hangcheck_action {
73 ENGINE_ACTIVE_SUBUNITS,
78 static inline const char *
79 hangcheck_action_to_str(const enum intel_engine_hangcheck_action a)
86 case ENGINE_ACTIVE_SEQNO:
87 return "active seqno";
88 case ENGINE_ACTIVE_HEAD:
90 case ENGINE_ACTIVE_SUBUNITS:
91 return "active subunits";
92 case ENGINE_WAIT_KICK:
101 #define I915_MAX_SLICES 3
102 #define I915_MAX_SUBSLICES 3
104 #define instdone_slice_mask(dev_priv__) \
105 (INTEL_GEN(dev_priv__) == 7 ? \
106 1 : INTEL_INFO(dev_priv__)->sseu.slice_mask)
108 #define instdone_subslice_mask(dev_priv__) \
109 (INTEL_GEN(dev_priv__) == 7 ? \
110 1 : INTEL_INFO(dev_priv__)->sseu.subslice_mask)
112 #define for_each_instdone_slice_subslice(dev_priv__, slice__, subslice__) \
113 for ((slice__) = 0, (subslice__) = 0; \
114 (slice__) < I915_MAX_SLICES; \
115 (subslice__) = ((subslice__) + 1) < I915_MAX_SUBSLICES ? (subslice__) + 1 : 0, \
116 (slice__) += ((subslice__) == 0)) \
117 for_each_if((BIT(slice__) & instdone_slice_mask(dev_priv__)) && \
118 (BIT(subslice__) & instdone_subslice_mask(dev_priv__)))
120 struct intel_instdone {
122 /* The following exist only in the RCS engine */
124 u32 sampler[I915_MAX_SLICES][I915_MAX_SUBSLICES];
125 u32 row[I915_MAX_SLICES][I915_MAX_SUBSLICES];
128 struct intel_engine_hangcheck {
131 enum intel_engine_hangcheck_action action;
132 unsigned long action_timestamp;
134 struct intel_instdone instdone;
139 struct i915_vma *vma;
142 struct list_head request_list;
153 struct i915_gem_context;
154 struct drm_i915_reg_table;
157 * we use a single page to load ctx workarounds so all of these
158 * values are referred in terms of dwords
160 * struct i915_wa_ctx_bb:
161 * offset: specifies batch starting position, also helpful in case
162 * if we want to have multiple batches at different offsets based on
163 * some criteria. It is not a requirement at the moment but provides
164 * an option for future use.
165 * size: size of the batch in DWORDS
167 struct i915_ctx_workarounds {
168 struct i915_wa_ctx_bb {
171 } indirect_ctx, per_ctx;
172 struct i915_vma *vma;
175 struct drm_i915_gem_request;
176 struct intel_render_state;
179 * Engine IDs definitions.
180 * Keep instances of the same type engine together.
182 enum intel_engine_id {
187 #define _VCS(n) (VCS + (n))
191 #define INTEL_ENGINE_CS_MAX_NAME 8
193 struct intel_engine_cs {
194 struct drm_i915_private *i915;
195 char name[INTEL_ENGINE_CS_MAX_NAME];
196 enum intel_engine_id id;
197 unsigned int uabi_id;
205 unsigned int irq_shift;
207 struct intel_ring *buffer;
208 struct intel_timeline *timeline;
210 struct intel_render_state *render_state;
213 unsigned long irq_posted;
214 #define ENGINE_IRQ_BREADCRUMB 0
215 #define ENGINE_IRQ_EXECLIST 1
217 /* Rather than have every client wait upon all user interrupts,
218 * with the herd waking after every interrupt and each doing the
219 * heavyweight seqno dance, we delegate the task (of being the
220 * bottom-half of the user interrupt) to the first client. After
221 * every interrupt, we wake up one client, who does the heavyweight
222 * coherent seqno read and either goes back to sleep (if incomplete),
223 * or wakes up all the completed clients in parallel, before then
224 * transferring the bottom-half status to the next client in the queue.
226 * Compared to walking the entire list of waiters in a single dedicated
227 * bottom-half, we reduce the latency of the first waiter by avoiding
228 * a context switch, but incur additional coherent seqno reads when
229 * following the chain of request breadcrumbs. Since it is most likely
230 * that we have a single client waiting on each seqno, then reducing
231 * the overhead of waking that client is much preferred.
233 struct intel_breadcrumbs {
234 spinlock_t irq_lock; /* protects irq_*; irqsafe */
235 struct intel_wait *irq_wait; /* oldest waiter by retirement */
237 spinlock_t rb_lock; /* protects the rb and wraps irq_lock */
238 struct rb_root waiters; /* sorted by retirement, priority */
239 struct rb_root signals; /* sorted by retirement */
240 struct task_struct *signaler; /* used for fence signalling */
241 struct drm_i915_gem_request __rcu *first_signal;
242 struct timer_list fake_irq; /* used after a missed interrupt */
243 struct timer_list hangcheck; /* detect missed interrupts */
245 unsigned int hangcheck_interrupts;
248 bool irq_enabled : 1;
249 I915_SELFTEST_DECLARE(bool mock : 1);
253 * A pool of objects to use as shadow copies of client batch buffers
254 * when the command parser is enabled. Prevents the client from
255 * modifying the batch contents after software parsing.
257 struct i915_gem_batch_pool batch_pool;
259 struct intel_hw_status_page status_page;
260 struct i915_ctx_workarounds wa_ctx;
261 struct i915_vma *scratch;
263 u32 irq_keep_mask; /* always keep these interrupts */
264 u32 irq_enable_mask; /* bitmask to enable ring interrupt */
265 void (*irq_enable)(struct intel_engine_cs *engine);
266 void (*irq_disable)(struct intel_engine_cs *engine);
268 int (*init_hw)(struct intel_engine_cs *engine);
269 void (*reset_hw)(struct intel_engine_cs *engine,
270 struct drm_i915_gem_request *req);
272 void (*set_default_submission)(struct intel_engine_cs *engine);
274 int (*context_pin)(struct intel_engine_cs *engine,
275 struct i915_gem_context *ctx);
276 void (*context_unpin)(struct intel_engine_cs *engine,
277 struct i915_gem_context *ctx);
278 int (*request_alloc)(struct drm_i915_gem_request *req);
279 int (*init_context)(struct drm_i915_gem_request *req);
281 int (*emit_flush)(struct drm_i915_gem_request *request,
283 #define EMIT_INVALIDATE BIT(0)
284 #define EMIT_FLUSH BIT(1)
285 #define EMIT_BARRIER (EMIT_INVALIDATE | EMIT_FLUSH)
286 int (*emit_bb_start)(struct drm_i915_gem_request *req,
287 u64 offset, u32 length,
288 unsigned int dispatch_flags);
289 #define I915_DISPATCH_SECURE BIT(0)
290 #define I915_DISPATCH_PINNED BIT(1)
291 #define I915_DISPATCH_RS BIT(2)
292 void (*emit_breadcrumb)(struct drm_i915_gem_request *req,
294 int emit_breadcrumb_sz;
296 /* Pass the request to the hardware queue (e.g. directly into
297 * the legacy ringbuffer or to the end of an execlist).
299 * This is called from an atomic context with irqs disabled; must
302 void (*submit_request)(struct drm_i915_gem_request *req);
304 /* Call when the priority on a request has changed and it and its
305 * dependencies may need rescheduling. Note the request itself may
306 * not be ready to run!
308 * Called under the struct_mutex.
310 void (*schedule)(struct drm_i915_gem_request *request,
313 /* Some chipsets are not quite as coherent as advertised and need
314 * an expensive kick to force a true read of the up-to-date seqno.
315 * However, the up-to-date seqno is not always required and the last
316 * seen value is good enough. Note that the seqno will always be
317 * monotonic, even if not coherent.
319 void (*irq_seqno_barrier)(struct intel_engine_cs *engine);
320 void (*cleanup)(struct intel_engine_cs *engine);
322 /* GEN8 signal/wait table - never trust comments!
323 * signal to signal to signal to signal to signal to
324 * RCS VCS BCS VECS VCS2
325 * --------------------------------------------------------------------
326 * RCS | NOP (0x00) | VCS (0x08) | BCS (0x10) | VECS (0x18) | VCS2 (0x20) |
327 * |-------------------------------------------------------------------
328 * VCS | RCS (0x28) | NOP (0x30) | BCS (0x38) | VECS (0x40) | VCS2 (0x48) |
329 * |-------------------------------------------------------------------
330 * BCS | RCS (0x50) | VCS (0x58) | NOP (0x60) | VECS (0x68) | VCS2 (0x70) |
331 * |-------------------------------------------------------------------
332 * VECS | RCS (0x78) | VCS (0x80) | BCS (0x88) | NOP (0x90) | VCS2 (0x98) |
333 * |-------------------------------------------------------------------
334 * VCS2 | RCS (0xa0) | VCS (0xa8) | BCS (0xb0) | VECS (0xb8) | NOP (0xc0) |
335 * |-------------------------------------------------------------------
338 * f(x, y) := (x->id * NUM_RINGS * seqno_size) + (seqno_size * y->id)
339 * ie. transpose of g(x, y)
341 * sync from sync from sync from sync from sync from
342 * RCS VCS BCS VECS VCS2
343 * --------------------------------------------------------------------
344 * RCS | NOP (0x00) | VCS (0x28) | BCS (0x50) | VECS (0x78) | VCS2 (0xa0) |
345 * |-------------------------------------------------------------------
346 * VCS | RCS (0x08) | NOP (0x30) | BCS (0x58) | VECS (0x80) | VCS2 (0xa8) |
347 * |-------------------------------------------------------------------
348 * BCS | RCS (0x10) | VCS (0x38) | NOP (0x60) | VECS (0x88) | VCS2 (0xb0) |
349 * |-------------------------------------------------------------------
350 * VECS | RCS (0x18) | VCS (0x40) | BCS (0x68) | NOP (0x90) | VCS2 (0xb8) |
351 * |-------------------------------------------------------------------
352 * VCS2 | RCS (0x20) | VCS (0x48) | BCS (0x70) | VECS (0x98) | NOP (0xc0) |
353 * |-------------------------------------------------------------------
356 * g(x, y) := (y->id * NUM_RINGS * seqno_size) + (seqno_size * x->id)
357 * ie. transpose of f(x, y)
361 #define GEN6_SEMAPHORE_LAST VECS_HW
362 #define GEN6_NUM_SEMAPHORES (GEN6_SEMAPHORE_LAST + 1)
363 #define GEN6_SEMAPHORES_MASK GENMASK(GEN6_SEMAPHORE_LAST, 0)
365 /* our mbox written by others */
366 u32 wait[GEN6_NUM_SEMAPHORES];
367 /* mboxes this ring signals to */
368 i915_reg_t signal[GEN6_NUM_SEMAPHORES];
370 u64 signal_ggtt[I915_NUM_ENGINES];
374 int (*sync_to)(struct drm_i915_gem_request *req,
375 struct drm_i915_gem_request *signal);
376 u32 *(*signal)(struct drm_i915_gem_request *req, u32 *cs);
380 struct tasklet_struct irq_tasklet;
381 struct execlist_port {
382 struct drm_i915_gem_request *request;
384 GEM_DEBUG_DECL(u32 context_id);
386 struct rb_root execlist_queue;
387 struct rb_node *execlist_first;
388 unsigned int fw_domains;
390 /* Contexts are pinned whilst they are active on the GPU. The last
391 * context executed remains active whilst the GPU is idle - the
392 * switch away and write to the context object only occurs on the
393 * next execution. Contexts are only unpinned on retirement of the
394 * following request ensuring that we can always write to the object
395 * on the context switch even after idling. Across suspend, we switch
396 * to the kernel context and trash it as the save may not happen
397 * before the hardware is powered down.
399 struct i915_gem_context *last_retired_context;
401 /* We track the current MI_SET_CONTEXT in order to eliminate
402 * redudant context switches. This presumes that requests are not
403 * reordered! Or when they are the tracking is updated along with
404 * the emission of individual requests into the legacy command
407 struct i915_gem_context *legacy_active_context;
409 /* status_notifier: list of callbacks for context-switch changes */
410 struct atomic_notifier_head context_status_notifier;
412 struct intel_engine_hangcheck hangcheck;
414 bool needs_cmd_parser;
417 * Table of commands the command parser needs to know about
420 DECLARE_HASHTABLE(cmd_hash, I915_CMD_HASH_ORDER);
423 * Table of registers allowed in commands that read/write registers.
425 const struct drm_i915_reg_table *reg_tables;
429 * Returns the bitmask for the length field of the specified command.
430 * Return 0 for an unrecognized/invalid command.
432 * If the command parser finds an entry for a command in the engine's
433 * cmd_tables, it gets the command's length based on the table entry.
434 * If not, it calls this function to determine the per-engine length
435 * field encoding for the command (i.e. different opcode ranges use
436 * certain bits to encode the command length in the header).
438 u32 (*get_cmd_length_mask)(u32 cmd_header);
441 static inline unsigned int
442 intel_engine_flag(const struct intel_engine_cs *engine)
444 return BIT(engine->id);
448 intel_read_status_page(struct intel_engine_cs *engine, int reg)
450 /* Ensure that the compiler doesn't optimize away the load. */
451 return READ_ONCE(engine->status_page.page_addr[reg]);
455 intel_write_status_page(struct intel_engine_cs *engine, int reg, u32 value)
457 /* Writing into the status page should be done sparingly. Since
458 * we do when we are uncertain of the device state, we take a bit
459 * of extra paranoia to try and ensure that the HWS takes the value
460 * we give and that it doesn't end up trapped inside the CPU!
462 if (static_cpu_has(X86_FEATURE_CLFLUSH)) {
464 clflush(&engine->status_page.page_addr[reg]);
465 engine->status_page.page_addr[reg] = value;
466 clflush(&engine->status_page.page_addr[reg]);
469 WRITE_ONCE(engine->status_page.page_addr[reg], value);
474 * Reads a dword out of the status page, which is written to from the command
475 * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
478 * The following dwords have a reserved meaning:
479 * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
480 * 0x04: ring 0 head pointer
481 * 0x05: ring 1 head pointer (915-class)
482 * 0x06: ring 2 head pointer (915-class)
483 * 0x10-0x1b: Context status DWords (GM45)
484 * 0x1f: Last written status offset. (GM45)
485 * 0x20-0x2f: Reserved (Gen6+)
487 * The area from dword 0x30 to 0x3ff is available for driver usage.
489 #define I915_GEM_HWS_INDEX 0x30
490 #define I915_GEM_HWS_INDEX_ADDR (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
491 #define I915_GEM_HWS_SCRATCH_INDEX 0x40
492 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
495 intel_engine_create_ring(struct intel_engine_cs *engine, int size);
496 int intel_ring_pin(struct intel_ring *ring,
497 struct drm_i915_private *i915,
498 unsigned int offset_bias);
499 void intel_ring_reset(struct intel_ring *ring, u32 tail);
500 void intel_ring_update_space(struct intel_ring *ring);
501 void intel_ring_unpin(struct intel_ring *ring);
502 void intel_ring_free(struct intel_ring *ring);
504 void intel_engine_stop(struct intel_engine_cs *engine);
505 void intel_engine_cleanup(struct intel_engine_cs *engine);
507 void intel_legacy_submission_resume(struct drm_i915_private *dev_priv);
509 int __must_check intel_ring_cacheline_align(struct drm_i915_gem_request *req);
511 u32 __must_check *intel_ring_begin(struct drm_i915_gem_request *req, int n);
514 intel_ring_advance(struct drm_i915_gem_request *req, u32 *cs)
518 * This serves as a placeholder in the code so that the reader
519 * can compare against the preceding intel_ring_begin() and
520 * check that the number of dwords emitted matches the space
521 * reserved for the command packet (i.e. the value passed to
522 * intel_ring_begin()).
524 GEM_BUG_ON((req->ring->vaddr + req->ring->emit) != cs);
528 intel_ring_wrap(const struct intel_ring *ring, u32 pos)
530 return pos & (ring->size - 1);
534 intel_ring_offset(const struct drm_i915_gem_request *req, void *addr)
536 /* Don't write ring->size (equivalent to 0) as that hangs some GPUs. */
537 u32 offset = addr - req->ring->vaddr;
538 GEM_BUG_ON(offset > req->ring->size);
539 return intel_ring_wrap(req->ring, offset);
543 assert_ring_tail_valid(const struct intel_ring *ring, unsigned int tail)
545 /* We could combine these into a single tail operation, but keeping
546 * them as seperate tests will help identify the cause should one
549 GEM_BUG_ON(!IS_ALIGNED(tail, 8));
550 GEM_BUG_ON(tail >= ring->size);
553 static inline unsigned int
554 intel_ring_set_tail(struct intel_ring *ring, unsigned int tail)
556 /* Whilst writes to the tail are strictly order, there is no
557 * serialisation between readers and the writers. The tail may be
558 * read by i915_gem_request_retire() just as it is being updated
559 * by execlists, as although the breadcrumb is complete, the context
560 * switch hasn't been seen.
562 assert_ring_tail_valid(ring, tail);
567 void intel_engine_init_global_seqno(struct intel_engine_cs *engine, u32 seqno);
569 void intel_engine_setup_common(struct intel_engine_cs *engine);
570 int intel_engine_init_common(struct intel_engine_cs *engine);
571 int intel_engine_create_scratch(struct intel_engine_cs *engine, int size);
572 void intel_engine_cleanup_common(struct intel_engine_cs *engine);
574 int intel_init_render_ring_buffer(struct intel_engine_cs *engine);
575 int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine);
576 int intel_init_blt_ring_buffer(struct intel_engine_cs *engine);
577 int intel_init_vebox_ring_buffer(struct intel_engine_cs *engine);
579 u64 intel_engine_get_active_head(struct intel_engine_cs *engine);
580 u64 intel_engine_get_last_batch_head(struct intel_engine_cs *engine);
582 static inline u32 intel_engine_get_seqno(struct intel_engine_cs *engine)
584 return intel_read_status_page(engine, I915_GEM_HWS_INDEX);
587 static inline u32 intel_engine_last_submit(struct intel_engine_cs *engine)
589 /* We are only peeking at the tail of the submit queue (and not the
590 * queue itself) in order to gain a hint as to the current active
591 * state of the engine. Callers are not expected to be taking
592 * engine->timeline->lock, nor are they expected to be concerned
593 * wtih serialising this hint with anything, so document it as
594 * a hint and nothing more.
596 return READ_ONCE(engine->timeline->seqno);
599 int init_workarounds_ring(struct intel_engine_cs *engine);
600 int intel_ring_workarounds_emit(struct drm_i915_gem_request *req);
602 void intel_engine_get_instdone(struct intel_engine_cs *engine,
603 struct intel_instdone *instdone);
606 * Arbitrary size for largest possible 'add request' sequence. The code paths
607 * are complex and variable. Empirical measurement shows that the worst case
608 * is BDW at 192 bytes (6 + 6 + 36 dwords), then ILK at 136 bytes. However,
609 * we need to allocate double the largest single packet within that emission
610 * to account for tail wraparound (so 6 + 6 + 72 dwords for BDW).
612 #define MIN_SPACE_FOR_ADD_REQUEST 336
614 static inline u32 intel_hws_seqno_address(struct intel_engine_cs *engine)
616 return engine->status_page.ggtt_offset + I915_GEM_HWS_INDEX_ADDR;
619 /* intel_breadcrumbs.c -- user interrupt bottom-half for waiters */
620 int intel_engine_init_breadcrumbs(struct intel_engine_cs *engine);
622 static inline void intel_wait_init(struct intel_wait *wait,
623 struct drm_i915_gem_request *rq)
629 static inline void intel_wait_init_for_seqno(struct intel_wait *wait, u32 seqno)
635 static inline bool intel_wait_has_seqno(const struct intel_wait *wait)
641 intel_wait_update_seqno(struct intel_wait *wait, u32 seqno)
644 return intel_wait_has_seqno(wait);
648 intel_wait_update_request(struct intel_wait *wait,
649 const struct drm_i915_gem_request *rq)
651 return intel_wait_update_seqno(wait, i915_gem_request_global_seqno(rq));
655 intel_wait_check_seqno(const struct intel_wait *wait, u32 seqno)
657 return wait->seqno == seqno;
661 intel_wait_check_request(const struct intel_wait *wait,
662 const struct drm_i915_gem_request *rq)
664 return intel_wait_check_seqno(wait, i915_gem_request_global_seqno(rq));
667 static inline bool intel_wait_complete(const struct intel_wait *wait)
669 return RB_EMPTY_NODE(&wait->node);
672 bool intel_engine_add_wait(struct intel_engine_cs *engine,
673 struct intel_wait *wait);
674 void intel_engine_remove_wait(struct intel_engine_cs *engine,
675 struct intel_wait *wait);
676 void intel_engine_enable_signaling(struct drm_i915_gem_request *request,
678 void intel_engine_cancel_signaling(struct drm_i915_gem_request *request);
680 static inline bool intel_engine_has_waiter(const struct intel_engine_cs *engine)
682 return READ_ONCE(engine->breadcrumbs.irq_wait);
685 unsigned int intel_engine_wakeup(struct intel_engine_cs *engine);
686 #define ENGINE_WAKEUP_WAITER BIT(0)
687 #define ENGINE_WAKEUP_ASLEEP BIT(1)
689 void __intel_engine_disarm_breadcrumbs(struct intel_engine_cs *engine);
690 void intel_engine_disarm_breadcrumbs(struct intel_engine_cs *engine);
692 void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine);
693 void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine);
694 bool intel_breadcrumbs_busy(struct intel_engine_cs *engine);
696 static inline u32 *gen8_emit_pipe_control(u32 *batch, u32 flags, u32 offset)
698 memset(batch, 0, 6 * sizeof(u32));
700 batch[0] = GFX_OP_PIPE_CONTROL(6);
707 bool intel_engine_is_idle(struct intel_engine_cs *engine);
708 bool intel_engines_are_idle(struct drm_i915_private *dev_priv);
710 void intel_engines_reset_default_submission(struct drm_i915_private *i915);
712 #endif /* _INTEL_RINGBUFFER_H_ */