drm/i915: Reduce engine->emit_flush() to a single mode parameter

Rather than passing a complete set of GPU cache domains for either
invalidation or for flushing, or even both, just pass a single parameter
to the engine->emit_flush to determine the required operations.

engine->emit_flush(GPU, 0) -> engine->emit_flush(EMIT_INVALIDATE)
engine->emit_flush(0, GPU) -> engine->emit_flush(EMIT_FLUSH)
engine->emit_flush(GPU, GPU) -> engine->emit_flush(EMIT_FLUSH | EMIT_INVALIDATE)

This allows us to extend the behaviour easily in future, for example if
we want just a command barrier without the overhead of flushing.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Gordon <david.s.gordon@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470174640-18242-8-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index beece8f..edde841 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -568,7 +568,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
         * itlb_before_ctx_switch.
         */
        if (IS_GEN6(dev_priv)) {
-               ret = engine->emit_flush(req, I915_GEM_GPU_DOMAINS, 0);
+               ret = engine->emit_flush(req, EMIT_INVALIDATE);
                if (ret)
                        return ret;
        }

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 35c4c59..e49776e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -999,7 +999,7 @@ i915_gem_execbuffer_move_to_gpu(struct drm_i915_gem_request *req,
                wmb();
 
        /* Unconditionally invalidate GPU caches and TLBs. */
-       return req->engine->emit_flush(req, I915_GEM_GPU_DOMAINS, 0);
+       return req->engine->emit_flush(req, EMIT_INVALIDATE);
 }
 
 static bool

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 39fa9eb..671b1ca 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1666,8 +1666,7 @@ static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt,
        int ret;
 
        /* NB: TLBs must be flushed and invalidated before a switch */
-       ret = engine->emit_flush(req,
-                                I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
+       ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
        if (ret)
                return ret;
 
@@ -1694,8 +1693,7 @@ static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt,
        int ret;
 
        /* NB: TLBs must be flushed and invalidated before a switch */
-       ret = engine->emit_flush(req,
-                                I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
+       ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
        if (ret)
                return ret;
 
@@ -1713,9 +1711,7 @@ static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt,
 
        /* XXX: RCS is the only one to auto invalidate the TLBs? */
        if (engine->id != RCS) {
-               ret = engine->emit_flush(req,
-                                        I915_GEM_GPU_DOMAINS,
-                                        I915_GEM_GPU_DOMAINS);
+               ret = engine->emit_flush(req, EMIT_INVALIDATE | EMIT_FLUSH);
                if (ret)
                        return ret;
        }

diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 7e32060..67f16fe 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -451,7 +451,7 @@ void __i915_add_request(struct drm_i915_gem_request *request,
         * what.
         */
        if (flush_caches) {
-               ret = engine->emit_flush(request, 0, I915_GEM_GPU_DOMAINS);
+               ret = engine->emit_flush(request, EMIT_FLUSH);
 
                /* Not allowed to fail! */
                WARN(ret, "engine->emit_flush() failed: %d!\n", ret);

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index e8d971e..af7d7e0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -672,7 +672,7 @@ static int execlists_move_to_gpu(struct drm_i915_gem_request *req,
        /* Unconditionally invalidate gpu caches and ensure that we do flush
         * any residual writes from the previous batch.
         */
-       return req->engine->emit_flush(req, I915_GEM_GPU_DOMAINS, 0);
+       return req->engine->emit_flush(req, EMIT_INVALIDATE);
 }
 
 int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request)
@@ -998,9 +998,7 @@ static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
        if (w->count == 0)
                return 0;
 
-       ret = req->engine->emit_flush(req,
-                                     I915_GEM_GPU_DOMAINS,
-                                     I915_GEM_GPU_DOMAINS);
+       ret = req->engine->emit_flush(req, EMIT_BARRIER);
        if (ret)
                return ret;
 
@@ -1017,9 +1015,7 @@ static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
 
        intel_ring_advance(ring);
 
-       ret = req->engine->emit_flush(req,
-                                     I915_GEM_GPU_DOMAINS,
-                                     I915_GEM_GPU_DOMAINS);
+       ret = req->engine->emit_flush(req, EMIT_BARRIER);
        if (ret)
                return ret;
 
@@ -1598,9 +1594,7 @@ static void gen8_logical_ring_disable_irq(struct intel_engine_cs *engine)
        I915_WRITE_IMR(engine, ~engine->irq_keep_mask);
 }
 
-static int gen8_emit_flush(struct drm_i915_gem_request *request,
-                          u32 invalidate_domains,
-                          u32 unused)
+static int gen8_emit_flush(struct drm_i915_gem_request *request, u32 mode)
 {
        struct intel_ring *ring = request->ring;
        u32 cmd;
@@ -1619,7 +1613,7 @@ static int gen8_emit_flush(struct drm_i915_gem_request *request,
         */
        cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
 
-       if (invalidate_domains & I915_GEM_GPU_DOMAINS) {
+       if (mode & EMIT_INVALIDATE) {
                cmd |= MI_INVALIDATE_TLB;
                if (request->engine->id == VCS)
                        cmd |= MI_INVALIDATE_BSD;
@@ -1637,8 +1631,7 @@ static int gen8_emit_flush(struct drm_i915_gem_request *request,
 }
 
 static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
-                                 u32 invalidate_domains,
-                                 u32 flush_domains)
+                                 u32 mode)
 {
        struct intel_ring *ring = request->ring;
        struct intel_engine_cs *engine = request->engine;
@@ -1650,14 +1643,14 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
 
        flags |= PIPE_CONTROL_CS_STALL;
 
-       if (flush_domains) {
+       if (mode & EMIT_FLUSH) {
                flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
                flags |= PIPE_CONTROL_FLUSH_ENABLE;
        }
 
-       if (invalidate_domains) {
+       if (mode & EMIT_INVALIDATE) {
                flags |= PIPE_CONTROL_TLB_INVALIDATE;
                flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
                flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 9e4b496..1f876e7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -67,19 +67,15 @@ static void __intel_engine_submit(struct intel_engine_cs *engine)
 }
 
 static int
-gen2_render_ring_flush(struct drm_i915_gem_request *req,
-                      u32      invalidate_domains,
-                      u32      flush_domains)
+gen2_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        u32 cmd;
        int ret;
 
        cmd = MI_FLUSH;
-       if (((invalidate_domains|flush_domains) & I915_GEM_DOMAIN_RENDER) == 0)
-               cmd |= MI_NO_WRITE_FLUSH;
 
-       if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER)
+       if (mode & EMIT_INVALIDATE)
                cmd |= MI_READ_FLUSH;
 
        ret = intel_ring_begin(req, 2);
@@ -94,9 +90,7 @@ gen2_render_ring_flush(struct drm_i915_gem_request *req,
 }
 
 static int
-gen4_render_ring_flush(struct drm_i915_gem_request *req,
-                      u32      invalidate_domains,
-                      u32      flush_domains)
+gen4_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        u32 cmd;
@@ -131,7 +125,7 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req,
         */
 
        cmd = MI_FLUSH;
-       if (invalidate_domains) {
+       if (mode & EMIT_INVALIDATE) {
                cmd |= MI_EXE_FLUSH;
                if (IS_G4X(req->i915) || IS_GEN5(req->i915))
                        cmd |= MI_INVALIDATE_ISP;
@@ -222,8 +216,7 @@ intel_emit_post_sync_nonzero_flush(struct drm_i915_gem_request *req)
 }
 
 static int
-gen6_render_ring_flush(struct drm_i915_gem_request *req,
-                      u32 invalidate_domains, u32 flush_domains)
+gen6_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        u32 scratch_addr =
@@ -240,7 +233,7 @@ gen6_render_ring_flush(struct drm_i915_gem_request *req,
         * number of bits based on the write domains has little performance
         * impact.
         */
-       if (flush_domains) {
+       if (mode & EMIT_FLUSH) {
                flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
                /*
@@ -249,7 +242,7 @@ gen6_render_ring_flush(struct drm_i915_gem_request *req,
                 */
                flags |= PIPE_CONTROL_CS_STALL;
        }
-       if (invalidate_domains) {
+       if (mode & EMIT_INVALIDATE) {
                flags |= PIPE_CONTROL_TLB_INVALIDATE;
                flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
                flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
@@ -297,8 +290,7 @@ gen7_render_ring_cs_stall_wa(struct drm_i915_gem_request *req)
 }
 
 static int
-gen7_render_ring_flush(struct drm_i915_gem_request *req,
-                      u32 invalidate_domains, u32 flush_domains)
+gen7_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        u32 scratch_addr =
@@ -320,13 +312,13 @@ gen7_render_ring_flush(struct drm_i915_gem_request *req,
         * number of bits based on the write domains has little performance
         * impact.
         */
-       if (flush_domains) {
+       if (mode & EMIT_FLUSH) {
                flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
                flags |= PIPE_CONTROL_FLUSH_ENABLE;
        }
-       if (invalidate_domains) {
+       if (mode & EMIT_INVALIDATE) {
                flags |= PIPE_CONTROL_TLB_INVALIDATE;
                flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
                flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
@@ -384,8 +376,7 @@ gen8_emit_pipe_control(struct drm_i915_gem_request *req,
 }
 
 static int
-gen8_render_ring_flush(struct drm_i915_gem_request *req,
-                      u32 invalidate_domains, u32 flush_domains)
+gen8_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        u32 scratch_addr = req->engine->scratch.gtt_offset + 2 * CACHELINE_BYTES;
        u32 flags = 0;
@@ -393,13 +384,13 @@ gen8_render_ring_flush(struct drm_i915_gem_request *req,
 
        flags |= PIPE_CONTROL_CS_STALL;
 
-       if (flush_domains) {
+       if (mode & EMIT_FLUSH) {
                flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
                flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
                flags |= PIPE_CONTROL_FLUSH_ENABLE;
        }
-       if (invalidate_domains) {
+       if (mode & EMIT_INVALIDATE) {
                flags |= PIPE_CONTROL_TLB_INVALIDATE;
                flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
                flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
@@ -688,9 +679,7 @@ static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
        if (w->count == 0)
                return 0;
 
-       ret = req->engine->emit_flush(req,
-                                     I915_GEM_GPU_DOMAINS,
-                                     I915_GEM_GPU_DOMAINS);
+       ret = req->engine->emit_flush(req, EMIT_BARRIER);
        if (ret)
                return ret;
 
@@ -707,9 +696,7 @@ static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
 
        intel_ring_advance(ring);
 
-       ret = req->engine->emit_flush(req,
-                                     I915_GEM_GPU_DOMAINS,
-                                     I915_GEM_GPU_DOMAINS);
+       ret = req->engine->emit_flush(req, EMIT_BARRIER);
        if (ret)
                return ret;
 
@@ -1700,9 +1687,7 @@ i8xx_irq_disable(struct intel_engine_cs *engine)
 }
 
 static int
-bsd_ring_flush(struct drm_i915_gem_request *req,
-              u32     invalidate_domains,
-              u32     flush_domains)
+bsd_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        int ret;
@@ -2533,8 +2518,7 @@ static void gen6_bsd_ring_write_tail(struct intel_engine_cs *engine,
        intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
 }
 
-static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req,
-                              u32 invalidate, u32 flush)
+static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        uint32_t cmd;
@@ -2561,7 +2545,7 @@ static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req,
         * operation is complete. This bit is only valid when the
         * Post-Sync Operation field is a value of 1h or 3h."
         */
-       if (invalidate & I915_GEM_GPU_DOMAINS)
+       if (mode & EMIT_INVALIDATE)
                cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
 
        intel_ring_emit(ring, cmd);
@@ -2653,8 +2637,7 @@ gen6_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
 
 /* Blitter support (SandyBridge+) */
 
-static int gen6_ring_flush(struct drm_i915_gem_request *req,
-                          u32 invalidate, u32 flush)
+static int gen6_ring_flush(struct drm_i915_gem_request *req, u32 mode)
 {
        struct intel_ring *ring = req->ring;
        uint32_t cmd;
@@ -2681,7 +2664,7 @@ static int gen6_ring_flush(struct drm_i915_gem_request *req,
         * operation is complete. This bit is only valid when the
         * Post-Sync Operation field is a value of 1h or 3h."
         */
-       if (invalidate & I915_GEM_DOMAIN_RENDER)
+       if (mode & EMIT_INVALIDATE)
                cmd |= MI_INVALIDATE_TLB;
        intel_ring_emit(ring, cmd);
        intel_ring_emit(ring,

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 0072340..76d0495 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -292,8 +292,10 @@ struct intel_engine_cs {
        u32 ctx_desc_template;
        int             (*emit_request)(struct drm_i915_gem_request *request);
        int             (*emit_flush)(struct drm_i915_gem_request *request,
-                                     u32 invalidate_domains,
-                                     u32 flush_domains);
+                                     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, unsigned dispatch_flags);