cregit-Linux how code gets into the kernel

Release 4.9 drivers/gpu/drm/i915/intel_ringbuffer.h

#ifndef _INTEL_RINGBUFFER_H_

#define _INTEL_RINGBUFFER_H_

#include <linux/hashtable.h>
#include "i915_gem_batch_pool.h"
#include "i915_gem_request.h"


#define I915_CMD_HASH_ORDER 9

/* Early gen2 devices have a cacheline of just 32 bytes, using 64 is overkill,
 * but keeps the logic simple. Indeed, the whole purpose of this macro is just
 * to give some inclination as to some of the magic values used in the various
 * 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"
 * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use"
 * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use"
 *
 * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same
 * cacheline, the Head Pointer must not be greater than the Tail
 * Pointer."
 */

#define I915_RING_FREE_SPACE 64


struct intel_hw_status_page {
	
struct i915_vma *vma;
	
u32 *page_addr;
	
u32 ggtt_offset;
};


#define I915_READ_TAIL(engine) I915_READ(RING_TAIL((engine)->mmio_base))

#define I915_WRITE_TAIL(engine, val) I915_WRITE(RING_TAIL((engine)->mmio_base), val)


#define I915_READ_START(engine) I915_READ(RING_START((engine)->mmio_base))

#define I915_WRITE_START(engine, val) I915_WRITE(RING_START((engine)->mmio_base), val)


#define I915_READ_HEAD(engine)  I915_READ(RING_HEAD((engine)->mmio_base))

#define I915_WRITE_HEAD(engine, val) I915_WRITE(RING_HEAD((engine)->mmio_base), val)


#define I915_READ_CTL(engine) I915_READ(RING_CTL((engine)->mmio_base))

#define I915_WRITE_CTL(engine, val) I915_WRITE(RING_CTL((engine)->mmio_base), val)


#define I915_READ_IMR(engine) I915_READ(RING_IMR((engine)->mmio_base))

#define I915_WRITE_IMR(engine, val) I915_WRITE(RING_IMR((engine)->mmio_base), val)


#define I915_READ_MODE(engine) I915_READ(RING_MI_MODE((engine)->mmio_base))

#define I915_WRITE_MODE(engine, val) I915_WRITE(RING_MI_MODE((engine)->mmio_base), val)

/* seqno size is actually only a uint32, but since we plan to use MI_FLUSH_DW to
 * do the writes, and that must have qw aligned offsets, simply pretend it's 8b.
 */

#define gen8_semaphore_seqno_size sizeof(uint64_t)

#define GEN8_SEMAPHORE_OFFSET(__from, __to)			     \
	(((__from) * I915_NUM_ENGINES  + (__to)) * gen8_semaphore_seqno_size)

#define GEN8_SIGNAL_OFFSET(__ring, to)			     \
	(dev_priv->semaphore->node.start + \
         GEN8_SEMAPHORE_OFFSET((__ring)->id, (to)))

#define GEN8_WAIT_OFFSET(__ring, from)			     \
	(dev_priv->semaphore->node.start + \
         GEN8_SEMAPHORE_OFFSET(from, (__ring)->id))


enum intel_engine_hangcheck_action {
	
HANGCHECK_IDLE = 0,
	
HANGCHECK_WAIT,
	
HANGCHECK_ACTIVE,
	
HANGCHECK_KICK,
	
HANGCHECK_HUNG,
};


#define HANGCHECK_SCORE_RING_HUNG 31


struct intel_engine_hangcheck {
	
u64 acthd;
	
u32 seqno;
	
int score;
	
enum intel_engine_hangcheck_action action;
	
int deadlock;
	
u32 instdone[I915_NUM_INSTDONE_REG];
};


struct intel_ring {
	
struct i915_vma *vma;
	
void *vaddr;

	
struct intel_engine_cs *engine;

	
struct list_head request_list;

	
u32 head;
	
u32 tail;
	
int space;
	
int size;
	
int effective_size;

	/** We track the position of the requests in the ring buffer, and
         * when each is retired we increment last_retired_head as the GPU
         * must have finished processing the request and so we know we
         * can advance the ringbuffer up to that position.
         *
         * last_retired_head is set to -1 after the value is consumed so
         * we can detect new retirements.
         */
	
u32 last_retired_head;
};

struct i915_gem_context;
struct drm_i915_reg_table;

/*
 * 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 i915_vma *vma;
};

struct drm_i915_gem_request;


struct intel_engine_cs {
	
struct drm_i915_private *i915;
	
const char	*name;
	
enum intel_engine_id {
		
RCS = 0,
		
BCS,
		
VCS,
		
VCS2,	/* Keep instances of the same type engine together. */
		
VECS
	} 
id;

#define I915_NUM_ENGINES 5

#define _VCS(n) (VCS + (n))
	
unsigned int exec_id;
	
enum intel_engine_hw_id {
		
RCS_HW = 0,
		
VCS_HW,
		
BCS_HW,
		
VECS_HW,
		
VCS2_HW
	} 
hw_id;
	
enum intel_engine_hw_id guc_id; /* XXX same as hw_id? */
	
u64 fence_context;
	
u32		mmio_base;
	
unsigned int irq_shift;
	
struct intel_ring *buffer;

	/* Rather than have every client wait upon all user interrupts,
         * with the herd waking after every interrupt and each doing the
         * heavyweight seqno dance, we delegate the task (of being the
         * bottom-half of the user interrupt) to the first client. After
         * every interrupt, we wake up one client, who does the heavyweight
         * coherent seqno read and either goes back to sleep (if incomplete),
         * or wakes up all the completed clients in parallel, before then
         * transferring the bottom-half status to the next client in the queue.
         *
         * Compared to walking the entire list of waiters in a single dedicated
         * bottom-half, we reduce the latency of the first waiter by avoiding
         * a context switch, but incur additional coherent seqno reads when
         * following the chain of request breadcrumbs. Since it is most likely
         * that we have a single client waiting on each seqno, then reducing
         * the overhead of waking that client is much preferred.
         */
	
struct intel_breadcrumbs {
		
struct task_struct __rcu *irq_seqno_bh; /* bh for interrupts */
		
bool irq_posted;

		
spinlock_t lock; /* protects the lists of requests */
		
struct rb_root waiters; /* sorted by retirement, priority */
		
struct rb_root signals; /* sorted by retirement */
		
struct intel_wait *first_wait; /* oldest waiter by retirement */
		
struct task_struct *signaler; /* used for fence signalling */
		
struct drm_i915_gem_request *first_signal;
		
struct timer_list fake_irq; /* used after a missed interrupt */
		
struct timer_list hangcheck; /* detect missed interrupts */

		
unsigned long timeout;

		
bool irq_enabled : 1;
		
bool rpm_wakelock : 1;
	} 
breadcrumbs;

	/*
         * A pool of objects to use as shadow copies of client batch buffers
         * when the command parser is enabled. Prevents the client from
         * modifying the batch contents after software parsing.
         */
	
struct i915_gem_batch_pool batch_pool;

	
struct intel_hw_status_page status_page;
	
struct i915_ctx_workarounds wa_ctx;
	
struct i915_vma *scratch;

	
u32             irq_keep_mask; /* always keep these interrupts */
	
u32		irq_enable_mask; /* bitmask to enable ring interrupt */
	
void		(*irq_enable)(struct intel_engine_cs *engine);
	
void		(*irq_disable)(struct intel_engine_cs *engine);

	
int		(*init_hw)(struct intel_engine_cs *engine);
	
void		(*reset_hw)(struct intel_engine_cs *engine,
				    struct drm_i915_gem_request *req);

	
int		(*init_context)(struct drm_i915_gem_request *req);

	
int		(*emit_flush)(struct drm_i915_gem_request *request,
				      u32 mode);

#define EMIT_INVALIDATE	BIT(0)

#define EMIT_FLUSH	BIT(1)

#define EMIT_BARRIER	(EMIT_INVALIDATE | EMIT_FLUSH)
	
int		(*emit_bb_start)(struct drm_i915_gem_request *req,
					 u64 offset, u32 length,
					 unsigned int dispatch_flags);

#define I915_DISPATCH_SECURE BIT(0)

#define I915_DISPATCH_PINNED BIT(1)

#define I915_DISPATCH_RS     BIT(2)
	
int		(*emit_request)(struct drm_i915_gem_request *req);

	/* Pass the request to the hardware queue (e.g. directly into
         * the legacy ringbuffer or to the end of an execlist).
         *
         * This is called from an atomic context with irqs disabled; must
         * be irq safe.
         */
	
void		(*submit_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
         * seen value is good enough. Note that the seqno will always be
         * monotonic, even if not coherent.
         */
	
void		(*irq_seqno_barrier)(struct intel_engine_cs *engine);
	
void		(*cleanup)(struct intel_engine_cs *engine);

	/* GEN8 signal/wait table - never trust comments!
         *        signal to     signal to    signal to   signal to      signal to
         *          RCS            VCS          BCS        VECS          VCS2
         *      --------------------------------------------------------------------
         *  RCS | NOP (0x00) | VCS (0x08) | BCS (0x10) | VECS (0x18) | VCS2 (0x20) |
         *      |-------------------------------------------------------------------
         *  VCS | RCS (0x28) | NOP (0x30) | BCS (0x38) | VECS (0x40) | VCS2 (0x48) |
         *      |-------------------------------------------------------------------
         *  BCS | RCS (0x50) | VCS (0x58) | NOP (0x60) | VECS (0x68) | VCS2 (0x70) |
         *      |-------------------------------------------------------------------
         * VECS | RCS (0x78) | VCS (0x80) | BCS (0x88) |  NOP (0x90) | VCS2 (0x98) |
         *      |-------------------------------------------------------------------
         * VCS2 | RCS (0xa0) | VCS (0xa8) | BCS (0xb0) | VECS (0xb8) | NOP  (0xc0) |
         *      |-------------------------------------------------------------------
         *
         * Generalization:
         *  f(x, y) := (x->id * NUM_RINGS * seqno_size) + (seqno_size * y->id)
         *  ie. transpose of g(x, y)
         *
         *       sync from      sync from    sync from    sync from     sync from
         *          RCS            VCS          BCS        VECS          VCS2
         *      --------------------------------------------------------------------
         *  RCS | NOP (0x00) | VCS (0x28) | BCS (0x50) | VECS (0x78) | VCS2 (0xa0) |
         *      |-------------------------------------------------------------------
         *  VCS | RCS (0x08) | NOP (0x30) | BCS (0x58) | VECS (0x80) | VCS2 (0xa8) |
         *      |-------------------------------------------------------------------
         *  BCS | RCS (0x10) | VCS (0x38) | NOP (0x60) | VECS (0x88) | VCS2 (0xb0) |
         *      |-------------------------------------------------------------------
         * VECS | RCS (0x18) | VCS (0x40) | BCS (0x68) |  NOP (0x90) | VCS2 (0xb8) |
         *      |-------------------------------------------------------------------
         * VCS2 | RCS (0x20) | VCS (0x48) | BCS (0x70) | VECS (0x98) |  NOP (0xc0) |
         *      |-------------------------------------------------------------------
         *
         * Generalization:
         *  g(x, y) := (y->id * NUM_RINGS * seqno_size) + (seqno_size * x->id)
         *  ie. transpose of f(x, y)
         */
	struct {
		
u32	sync_seqno[I915_NUM_ENGINES-1];

		union {

#define GEN6_SEMAPHORE_LAST	VECS_HW

#define GEN6_NUM_SEMAPHORES	(GEN6_SEMAPHORE_LAST + 1)

#define GEN6_SEMAPHORES_MASK	GENMASK(GEN6_SEMAPHORE_LAST, 0)
			struct {
				/* our mbox written by others */
				
u32		wait[GEN6_NUM_SEMAPHORES];
				/* mboxes this ring signals to */
				
i915_reg_t	signal[GEN6_NUM_SEMAPHORES];
			} 
mbox;
			
u64		signal_ggtt[I915_NUM_ENGINES];
		};

		/* AKA wait() */
		
int	(*sync_to)(struct drm_i915_gem_request *req,
				   struct drm_i915_gem_request *signal);
		
int	(*signal)(struct drm_i915_gem_request *req);
	} 
semaphore;

	/* Execlists */
	
struct tasklet_struct irq_tasklet;
	
spinlock_t execlist_lock; /* used inside tasklet, use spin_lock_bh */
	
struct execlist_port {
		
struct drm_i915_gem_request *request;
		
unsigned int count;
	} 
execlist_port[2];
	
struct list_head execlist_queue;
	
unsigned int fw_domains;
	
bool disable_lite_restore_wa;
	
bool preempt_wa;
	
u32 ctx_desc_template;

	/**
         * List of breadcrumbs associated with GPU requests currently
         * outstanding.
         */
	
struct list_head request_list;

	/**
         * Seqno of request most recently submitted to request_list.
         * Used exclusively by hang checker to avoid grabbing lock while
         * inspecting request list.
         */
	
u32 last_submitted_seqno;
	
u32 last_pending_seqno;

	/* An RCU guarded pointer to the last request. No reference is
         * held to the request, users must carefully acquire a reference to
         * the request using i915_gem_active_get_rcu(), or hold the
         * struct_mutex.
         */
	
struct i915_gem_active last_request;

	
struct i915_gem_context *last_context;

	
struct intel_engine_hangcheck hangcheck;

	
bool needs_cmd_parser;

	/*
         * Table of commands the command parser needs to know about
         * for this engine.
         */
	DECLARE_HASHTABLE(cmd_hash, I915_CMD_HASH_ORDER);

	/*
         * Table of registers allowed in commands that read/write registers.
         */
	
const struct drm_i915_reg_table *reg_tables;
	
int reg_table_count;

	/*
         * Returns the bitmask for the length field of the specified command.
         * Return 0 for an unrecognized/invalid command.
         *
         * If the command parser finds an entry for a command in the engine's
         * cmd_tables, it gets the command's length based on the table entry.
         * If not, it calls this function to determine the per-engine length
         * field encoding for the command (i.e. different opcode ranges use
         * certain bits to encode the command length in the header).
         */
	
u32 (*get_cmd_length_mask)(u32 cmd_header);
};


static inline bool intel_engine_initialized(const struct intel_engine_cs *engine) { return engine->i915 != NULL; }

Contributors

PersonTokensPropCommitsCommitProp
dave gordondave gordon945.00%114.29%
chris wilsonchris wilson735.00%342.86%
tvrtko ursulintvrtko ursulin315.00%228.57%
oscar mateooscar mateo15.00%114.29%
Total20100.00%7100.00%


static inline unsigned intel_engine_flag(const struct intel_engine_cs *engine) { return 1 << engine->id; }

Contributors

PersonTokensPropCommitsCommitProp
daniel vetterdaniel vetter1365.00%116.67%
chris wilsonchris wilson315.00%233.33%
tvrtko ursulintvrtko ursulin315.00%233.33%
oscar mateooscar mateo15.00%116.67%
Total20100.00%6100.00%


static inline u32 intel_engine_sync_index(struct intel_engine_cs *engine, struct intel_engine_cs *other) { int idx; /* * rcs -> 0 = vcs, 1 = bcs, 2 = vecs, 3 = vcs2; * vcs -> 0 = bcs, 1 = vecs, 2 = vcs2, 3 = rcs; * bcs -> 0 = vecs, 1 = vcs2. 2 = rcs, 3 = vcs; * vecs -> 0 = vcs2, 1 = rcs, 2 = vcs, 3 = bcs; * vcs2 -> 0 = rcs, 1 = vcs, 2 = bcs, 3 = vecs; */ idx = (other - engine) - 1; if (idx < 0) idx += I915_NUM_ENGINES; return idx; }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson3579.55%225.00%
tvrtko ursulintvrtko ursulin36.82%225.00%
oscar mateooscar mateo24.55%112.50%
daniel vetterdaniel vetter24.55%112.50%
rodrigo vivirodrigo vivi12.27%112.50%
zou nan haizou nan hai12.27%112.50%
Total44100.00%8100.00%


static inline void intel_flush_status_page(struct intel_engine_cs *engine, int reg) { mb(); clflush(&engine->status_page.page_addr[reg]); mb(); }

Contributors

PersonTokensPropCommitsCommitProp
imre deakimre deak2367.65%125.00%
chris wilsonchris wilson926.47%250.00%
tvrtko ursulintvrtko ursulin25.88%125.00%
Total34100.00%4100.00%


static inline u32 intel_read_status_page(struct intel_engine_cs *engine, int reg) { /* Ensure that the compiler doesn't optimize away the load. */ return READ_ONCE(engine->status_page.page_addr[reg]); }

Contributors

PersonTokensPropCommitsCommitProp
zou nan haizou nan hai1655.17%112.50%
chris wilsonchris wilson517.24%337.50%
daniel vetterdaniel vetter310.34%112.50%
tvrtko ursulintvrtko ursulin26.90%112.50%
imre deakimre deak26.90%112.50%
oscar mateooscar mateo13.45%112.50%
Total29100.00%8100.00%


static inline void intel_write_status_page(struct intel_engine_cs *engine, int reg, u32 value) { engine->status_page.page_addr[reg] = value; }

Contributors

PersonTokensPropCommitsCommitProp
mika kuoppalamika kuoppala2689.66%133.33%
tvrtko ursulintvrtko ursulin26.90%133.33%
oscar mateooscar mateo13.45%133.33%
Total29100.00%3100.00%

/* * Reads a dword out of the status page, which is written to from the command * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or * MI_STORE_DATA_IMM. * * The following dwords have a reserved meaning: * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes. * 0x04: ring 0 head pointer * 0x05: ring 1 head pointer (915-class) * 0x06: ring 2 head pointer (915-class) * 0x10-0x1b: Context status DWords (GM45) * 0x1f: Last written status offset. (GM45) * 0x20-0x2f: Reserved (Gen6+) * * The area from dword 0x30 to 0x3ff is available for driver usage. */ #define I915_GEM_HWS_INDEX 0x30 #define I915_GEM_HWS_INDEX_ADDR (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT) #define I915_GEM_HWS_SCRATCH_INDEX 0x40 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT) struct intel_ring * intel_engine_create_ring(struct intel_engine_cs *engine, int size); int intel_ring_pin(struct intel_ring *ring); void intel_ring_unpin(struct intel_ring *ring); void intel_ring_free(struct intel_ring *ring); void intel_engine_stop(struct intel_engine_cs *engine); void intel_engine_cleanup(struct intel_engine_cs *engine); void intel_legacy_submission_resume(struct drm_i915_private *dev_priv); int intel_ring_alloc_request_extras(struct drm_i915_gem_request *request); 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_ring *ring, u32 data) { *(uint32_t *)(ring->vaddr + ring->tail) = data; ring->tail += 4; }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson2873.68%675.00%
zou nan haizou nan hai718.42%112.50%
oscar mateooscar mateo37.89%112.50%
Total38100.00%8100.00%


static inline void intel_ring_emit_reg(struct intel_ring *ring, i915_reg_t reg) { intel_ring_emit(ring, i915_mmio_reg_offset(reg)); }

Contributors

PersonTokensPropCommitsCommitProp
ville syrjalaville syrjala2288.00%250.00%
chris wilsonchris wilson312.00%250.00%
Total25100.00%4100.00%


static inline void intel_ring_advance(struct intel_ring *ring) { /* Dummy function. * * This serves as a placeholder in the code so that the reader * can compare against the preceding intel_ring_begin() and * check that the number of dwords emitted matches the space * reserved for the command packet (i.e. the value passed to * intel_ring_begin()). */ }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson969.23%583.33%
zou nan haizou nan hai430.77%116.67%
Total13100.00%6100.00%


static inline u32 intel_ring_offset(struct intel_ring *ring, u32 value) { /* Don't write ring->size (equivalent to 0) as that hangs some GPUs. */ return value & (ring->size - 1); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson27100.00%3100.00%
Total27100.00%3100.00%

int __intel_ring_space(int head, int tail, int size); void intel_ring_update_space(struct intel_ring *ring); void intel_engine_init_seqno(struct intel_engine_cs *engine, u32 seqno); void intel_engine_setup_common(struct intel_engine_cs *engine); int intel_engine_init_common(struct intel_engine_cs *engine); int intel_engine_create_scratch(struct intel_engine_cs *engine, int size); void intel_engine_cleanup_common(struct intel_engine_cs *engine);
static inline int intel_engine_idle(struct intel_engine_cs *engine, unsigned int flags) { /* Wait upon the last request to be completed */ return i915_gem_active_wait_unlocked(&engine->last_request, flags, NULL, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson32100.00%2100.00%
Total32100.00%2100.00%

int intel_init_render_ring_buffer(struct intel_engine_cs *engine); int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine); int intel_init_bsd2_ring_buffer(struct intel_engine_cs *engine); int intel_init_blt_ring_buffer(struct intel_engine_cs *engine); int intel_init_vebox_ring_buffer(struct intel_engine_cs *engine); u64 intel_engine_get_active_head(struct intel_engine_cs *engine);
static inline u32 intel_engine_get_seqno(struct intel_engine_cs *engine) { return intel_read_status_page(engine, I915_GEM_HWS_INDEX); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson20100.00%1100.00%
Total20100.00%1100.00%

int init_workarounds_ring(struct intel_engine_cs *engine); /* * Arbitrary size for largest possible 'add request' sequence. The code paths * are complex and variable. Empirical measurement shows that the worst case * is BDW at 192 bytes (6 + 6 + 36 dwords), then ILK at 136 bytes. However, * we need to allocate double the largest single packet within that emission * to account for tail wraparound (so 6 + 6 + 72 dwords for BDW). */ #define MIN_SPACE_FOR_ADD_REQUEST 336
static inline u32 intel_hws_seqno_address(struct intel_engine_cs *engine) { return engine->status_page.ggtt_offset + I915_GEM_HWS_INDEX_ADDR; }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson21100.00%2100.00%
Total21100.00%2100.00%

/* intel_breadcrumbs.c -- user interrupt bottom-half for waiters */ int intel_engine_init_breadcrumbs(struct intel_engine_cs *engine);
static inline void intel_wait_init(struct intel_wait *wait, u32 seqno) { wait->tsk = current; wait->seqno = seqno; }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson27100.00%1100.00%
Total27100.00%1100.00%


static inline bool intel_wait_complete(const struct intel_wait *wait) { return RB_EMPTY_NODE(&wait->node); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson22100.00%1100.00%
Total22100.00%1100.00%

bool intel_engine_add_wait(struct intel_engine_cs *engine, struct intel_wait *wait); void intel_engine_remove_wait(struct intel_engine_cs *engine, struct intel_wait *wait); void intel_engine_enable_signaling(struct drm_i915_gem_request *request);
static inline bool intel_engine_has_waiter(const struct intel_engine_cs *engine) { return rcu_access_pointer(engine->breadcrumbs.irq_seqno_bh); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson23100.00%3100.00%
Total23100.00%3100.00%


static inline bool intel_engine_wakeup(const struct intel_engine_cs *engine) { bool wakeup = false; /* Note that for this not to dangerously chase a dangling pointer, * we must hold the rcu_read_lock here. * * Also note that tsk is likely to be in !TASK_RUNNING state so an * early test for tsk->state != TASK_RUNNING before wake_up_process() * is unlikely to be beneficial. */ if (intel_engine_has_waiter(engine)) { struct task_struct *tsk; rcu_read_lock(); tsk = rcu_dereference(engine->breadcrumbs.irq_seqno_bh); if (tsk) wakeup = wake_up_process(tsk); rcu_read_unlock(); } return wakeup; }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson64100.00%3100.00%
Total64100.00%3100.00%

void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine); void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine); unsigned int intel_kick_waiters(struct drm_i915_private *i915); unsigned int intel_kick_signalers(struct drm_i915_private *i915);
static inline bool intel_engine_is_active(struct intel_engine_cs *engine) { return i915_gem_active_isset(&engine->last_request); }

Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson21100.00%1100.00%
Total21100.00%1100.00%

#endif /* _INTEL_RINGBUFFER_H_ */

Overall Contributors

PersonTokensPropCommitsCommitProp
chris wilsonchris wilson84649.62%7445.40%
zou nan haizou nan hai1277.45%21.23%
tvrtko ursulintvrtko ursulin1086.33%127.36%
ben widawskyben widawsky955.57%84.91%
oscar mateooscar mateo875.10%84.91%
daniel vetterdaniel vetter854.99%116.75%
mika kuoppalamika kuoppala653.81%95.52%
dave gordondave gordon492.87%53.07%
arun siluveryarun siluvery402.35%21.23%
ville syrjalaville syrjala362.11%42.45%
brad volkinbrad volkin331.94%21.23%
imre deakimre deak251.47%10.61%
john harrisonjohn harrison221.29%84.91%
michel thierrymichel thierry160.94%21.23%
thomas danielthomas daniel130.76%21.23%
yakui zhaoyakui zhao130.76%21.23%
haihao xianghaihao xiang110.65%10.61%
jesse barnesjesse barnes70.41%10.61%
jani nikulajani nikula60.35%21.23%
naresh kumar kachhinaresh kumar kachhi50.29%10.61%
tomas elftomas elf40.23%10.61%
jordan justenjordan justen40.23%10.61%
francisco jerezfrancisco jerez30.18%10.61%
nicholas hoathnicholas hoath20.12%10.61%
alex daialex dai20.12%10.61%
rodrigo vivirodrigo vivi10.06%10.61%
Total1705100.00%163100.00%