drm/nouveau: Add cache_flush/pull fifo engine functions.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>

3 files changed, 48 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 5f8cbb79c499..48d0ad9434a8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -292,6 +292,8 @@ struct nouveau_fifo_engine {
         void (*disable)(struct drm_device *);
         void (*enable)(struct drm_device *);
         bool (*reassign)(struct drm_device *, bool enable);
+        bool (*cache_flush)(struct drm_device *dev);
+        bool (*cache_pull)(struct drm_device *dev, bool enable);
 
         int  (*channel_id)(struct drm_device *);
 
@@ -889,6 +891,8 @@ extern int  nv04_fifo_init(struct drm_device *);
 extern void nv04_fifo_disable(struct drm_device *);
 extern void nv04_fifo_enable(struct drm_device *);
 extern bool nv04_fifo_reassign(struct drm_device *, bool);
+extern bool nv04_fifo_cache_flush(struct drm_device *);
+extern bool nv04_fifo_cache_pull(struct drm_device *, bool);
 extern int  nv04_fifo_channel_id(struct drm_device *);
 extern int  nv04_fifo_create_context(struct nouveau_channel *);
 extern void nv04_fifo_destroy_context(struct nouveau_channel *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index e76ec2d207a9..9f988431f34c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -76,6 +76,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->fifo.disable            = nv04_fifo_disable;
                 engine->fifo.enable             = nv04_fifo_enable;
                 engine->fifo.reassign           = nv04_fifo_reassign;
+                engine->fifo.cache_flush        = nv04_fifo_cache_flush;
+                engine->fifo.cache_pull         = nv04_fifo_cache_pull;
                 engine->fifo.channel_id         = nv04_fifo_channel_id;
                 engine->fifo.create_context     = nv04_fifo_create_context;
                 engine->fifo.destroy_context    = nv04_fifo_destroy_context;
@@ -115,6 +117,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->fifo.disable            = nv04_fifo_disable;
                 engine->fifo.enable             = nv04_fifo_enable;
                 engine->fifo.reassign           = nv04_fifo_reassign;
+                engine->fifo.cache_flush        = nv04_fifo_cache_flush;
+                engine->fifo.cache_pull         = nv04_fifo_cache_pull;
                 engine->fifo.channel_id         = nv10_fifo_channel_id;
                 engine->fifo.create_context     = nv10_fifo_create_context;
                 engine->fifo.destroy_context    = nv10_fifo_destroy_context;
@@ -154,6 +158,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->fifo.disable            = nv04_fifo_disable;
                 engine->fifo.enable             = nv04_fifo_enable;
                 engine->fifo.reassign           = nv04_fifo_reassign;
+                engine->fifo.cache_flush        = nv04_fifo_cache_flush;
+                engine->fifo.cache_pull         = nv04_fifo_cache_pull;
                 engine->fifo.channel_id         = nv10_fifo_channel_id;
                 engine->fifo.create_context     = nv10_fifo_create_context;
                 engine->fifo.destroy_context    = nv10_fifo_destroy_context;
@@ -193,6 +199,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->fifo.disable            = nv04_fifo_disable;
                 engine->fifo.enable             = nv04_fifo_enable;
                 engine->fifo.reassign           = nv04_fifo_reassign;
+                engine->fifo.cache_flush        = nv04_fifo_cache_flush;
+                engine->fifo.cache_pull         = nv04_fifo_cache_pull;
                 engine->fifo.channel_id         = nv10_fifo_channel_id;
                 engine->fifo.create_context     = nv10_fifo_create_context;
                 engine->fifo.destroy_context    = nv10_fifo_destroy_context;
@@ -233,6 +241,8 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->fifo.disable            = nv04_fifo_disable;
                 engine->fifo.enable             = nv04_fifo_enable;
                 engine->fifo.reassign           = nv04_fifo_reassign;
+                engine->fifo.cache_flush        = nv04_fifo_cache_flush;
+                engine->fifo.cache_pull         = nv04_fifo_cache_pull;
                 engine->fifo.channel_id         = nv10_fifo_channel_id;
                 engine->fifo.create_context     = nv40_fifo_create_context;
                 engine->fifo.destroy_context    = nv40_fifo_destroy_context;
diff --git a/drivers/gpu/drm/nouveau/nv04_fifo.c b/drivers/gpu/drm/nouveau/nv04_fifo.c
index 0c3cd53c7313..f31347b8c9b0 100644
--- a/drivers/gpu/drm/nouveau/nv04_fifo.c
+++ b/drivers/gpu/drm/nouveau/nv04_fifo.c
@@ -71,6 +71,40 @@ nv04_fifo_reassign(struct drm_device *dev, bool enable)
         return (reassign == 1);
 }
 
+bool
+nv04_fifo_cache_flush(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
+        uint64_t start = ptimer->read(dev);
+
+        do {
+                if (nv_rd32(dev, NV03_PFIFO_CACHE1_GET) ==
+                    nv_rd32(dev, NV03_PFIFO_CACHE1_PUT))
+                        return true;
+
+        } while (ptimer->read(dev) - start < 100000000);
+
+        NV_ERROR(dev, "Timeout flushing the PFIFO cache.\n");
+
+        return false;
+}
+
+bool
+nv04_fifo_cache_pull(struct drm_device *dev, bool enable)
+{
+        uint32_t pull = nv_rd32(dev, NV04_PFIFO_CACHE1_PULL0);
+
+        if (enable) {
+                nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, pull | 1);
+        } else {
+                nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, pull & ~1);
+                nv_wr32(dev, NV04_PFIFO_CACHE1_HASH, 0);
+        }
+
+        return !!(pull & 1);
+}
+
 int
 nv04_fifo_channel_id(struct drm_device *dev)
 {