drm/nve0/fifo: runlist intr

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
index b60df6b..51fa792 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
@@ -60,6 +60,7 @@ static const struct {
 struct nve0_fifo_engn {
        struct nouveau_gpuobj *runlist[2];
        int cur_runlist;
+       wait_queue_head_t wait;
 };
 
 struct nve0_fifo_priv {
@@ -646,6 +647,18 @@ nve0_fifo_intr_pbdma(struct nve0_fifo_priv *priv, int unit)
        nv_wr32(priv, 0x040108 + (unit * 0x2000), stat);
 }
 
+static void
+nve0_fifo_intr_runlist(struct nve0_fifo_priv *priv)
+{
+       u32 mask = nv_rd32(priv, 0x002a00);
+       while (mask) {
+               u32 engn = __ffs(mask);
+               wake_up(&priv->engine[engn].wait);
+               nv_wr32(priv, 0x002a00, 1 << engn);
+               mask &= ~(1 << engn);
+       }
+}
+
 static void
 nve0_fifo_intr_engine(struct nve0_fifo_priv *priv)
 {
@@ -731,14 +744,7 @@ nve0_fifo_intr(struct nouveau_subdev *subdev)
        }
 
        if (stat & 0x40000000) {
-               u32 mask = nv_mask(priv, 0x002a00, 0x00000000, 0x00000000);
-
-               while (mask) {
-                       u32 engn = ffs(mask) - 1;
-                       /* runlist event, not currently used */
-                       mask &= ~(1 << engn);
-               }
-
+               nve0_fifo_intr_runlist(priv);
                stat &= ~0x40000000;
        }
 
@@ -808,9 +814,8 @@ nve0_fifo_init(struct nouveau_object *object)
 
        nv_wr32(priv, 0x002254, 0x10000000 | priv->user.bar.offset >> 12);
 
-       nv_wr32(priv, 0x002a00, 0xffffffff);
        nv_wr32(priv, 0x002100, 0xffffffff);
-       nv_wr32(priv, 0x002140, 0x3fffffff);
+       nv_wr32(priv, 0x002140, 0x7fffffff);
        return 0;
 }
 
@@ -856,6 +861,8 @@ nve0_fifo_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
                                         0, &priv->engine[i].runlist[1]);
                if (ret)
                        return ret;
+
+               init_waitqueue_head(&priv->engine[i].wait);
        }
 
        ret = nouveau_gpuobj_new(nv_object(priv), NULL, impl->channels * 0x200,