From 5ee426ca135c91e071d23853e876b957526841c5 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Mon, 30 Jun 2014 09:53:38 -0700 Subject: [PATCH] drm/i915/bdw: implement semaphore wait Semaphore waits use a new instruction, MI_SEMAPHORE_WAIT. The seqno to wait on is all well defined by the table in the previous patch. There is nothing else different from previous GEN's semaphore synchronization code. v2: Update macros to not require the other ring's ring->id (Chris) v3: Add missing VCS2 gen8_ring_wait init besides s/ring_buffer/engine_cs (Rodrigo) Reviewed-by: Rodrigo Vivi Signed-off-by: Ben Widawsky Signed-off-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_ringbuffer.c | 35 +++++++++++++++++++++---- 2 files changed, 33 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 218ca7b7bb7..8c0f70de9fd 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -268,6 +268,9 @@ #define MI_RESTORE_INHIBIT (1<<0) #define MI_SEMAPHORE_SIGNAL MI_INSTR(0x1b, 0) /* GEN8+ */ #define MI_SEMAPHORE_TARGET(engine) ((engine)<<15) +#define MI_SEMAPHORE_WAIT MI_INSTR(0x1c, 2) /* GEN8+ */ +#define MI_SEMAPHORE_POLL (1<<15) +#define MI_SEMAPHORE_SAD_GTE_SDD (1<<12) #define MI_STORE_DWORD_IMM MI_INSTR(0x20, 1) #define MI_MEM_VIRTUAL (1 << 22) /* 965+ only */ #define MI_STORE_DWORD_INDEX MI_INSTR(0x21, 1) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index e1aac25fc84..88196808cc4 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -832,6 +832,31 @@ static inline bool i915_gem_has_seqno_wrapped(struct drm_device *dev, * @signaller - ring which has, or will signal * @seqno - seqno which the waiter will block on */ + +static int +gen8_ring_sync(struct intel_engine_cs *waiter, + struct intel_engine_cs *signaller, + u32 seqno) +{ + struct drm_i915_private *dev_priv = waiter->dev->dev_private; + int ret; + + ret = intel_ring_begin(waiter, 4); + if (ret) + return ret; + + intel_ring_emit(waiter, MI_SEMAPHORE_WAIT | + MI_SEMAPHORE_GLOBAL_GTT | + MI_SEMAPHORE_SAD_GTE_SDD); + intel_ring_emit(waiter, seqno); + intel_ring_emit(waiter, + lower_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); + intel_ring_emit(waiter, + upper_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id))); + intel_ring_advance(waiter); + return 0; +} + static int gen6_ring_sync(struct intel_engine_cs *waiter, struct intel_engine_cs *signaller, @@ -2056,7 +2081,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev) ring->set_seqno = ring_set_seqno; if (i915_semaphore_is_enabled(dev)) { WARN_ON(!dev_priv->semaphore_obj); - ring->semaphore.sync_to = gen6_ring_sync; + ring->semaphore.sync_to = gen8_ring_sync; ring->semaphore.signal = gen8_rcs_signal; GEN8_RING_SEMAPHORE_INIT; } @@ -2267,7 +2292,7 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev) ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; if (i915_semaphore_is_enabled(dev)) { - ring->semaphore.sync_to = gen6_ring_sync; + ring->semaphore.sync_to = gen8_ring_sync; ring->semaphore.signal = gen8_xcs_signal; GEN8_RING_SEMAPHORE_INIT; } @@ -2343,8 +2368,8 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev) ring->irq_put = gen8_ring_put_irq; ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; - ring->semaphore.sync_to = gen6_ring_sync; if (i915_semaphore_is_enabled(dev)) { + ring->semaphore.sync_to = gen8_ring_sync; ring->semaphore.signal = gen8_xcs_signal; GEN8_RING_SEMAPHORE_INIT; } @@ -2374,7 +2399,7 @@ int intel_init_blt_ring_buffer(struct drm_device *dev) ring->irq_put = gen8_ring_put_irq; ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; if (i915_semaphore_is_enabled(dev)) { - ring->semaphore.sync_to = gen6_ring_sync; + ring->semaphore.sync_to = gen8_ring_sync; ring->semaphore.signal = gen8_xcs_signal; GEN8_RING_SEMAPHORE_INIT; } @@ -2432,7 +2457,7 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev) ring->irq_put = gen8_ring_put_irq; ring->dispatch_execbuffer = gen8_ring_dispatch_execbuffer; if (i915_semaphore_is_enabled(dev)) { - ring->semaphore.sync_to = gen6_ring_sync; + ring->semaphore.sync_to = gen8_ring_sync; ring->semaphore.signal = gen8_xcs_signal; GEN8_RING_SEMAPHORE_INIT; } -- 2.41.0