drm/nouveau/core: have fifo store a unique context identifier at attach time

This value will match something that's easily available from the engine IRQ
handlers, and used to lookup the relevant context.

Since the changes in how this is done on each generation match when the
major PFIFO changes happened, fifo is responsible for calculating the
correct value to avoid duplicating the same code among many engine modules.

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

11 files changed, 23 insertions, 2 deletions

diff --git a/drivers/gpu/drm/nouveau/core/core/engctx.c b/drivers/gpu/drm/nouveau/core/core/engctx.c
index 38c0612a512..ad4bbe106b0 100644
--- a/drivers/gpu/drm/nouveau/core/core/engctx.c
+++ b/drivers/gpu/drm/nouveau/core/core/engctx.c
@@ -105,6 +105,7 @@ nouveau_engctx_create_(struct nouveau_object *parent,
 	if (client->vm)
 		atomic_inc(&client->vm->engref[nv_engidx(engobj)]);
 	list_add(&nv_engctx(engctx)->head, &engine->contexts);
+	nv_engctx(engctx)->addr = ~0ULL;
 	spin_unlock_irqrestore(&engine->lock, save);
 	return 0;
 }
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv04.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv04.c
index 8b7513f4dc8..7cd5d76dad2 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv04.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv04.c
@@ -102,6 +102,14 @@ nv04_fifo_object_detach(struct nouveau_object *parent, int cookie)
 	mutex_unlock(&nv_subdev(priv)->mutex);
 }
 
+int
+nv04_fifo_context_attach(struct nouveau_object *parent,
+			 struct nouveau_object *object)
+{
+	nv_engctx(object)->addr = nouveau_fifo_chan(parent)->chid;
+	return 0;
+}
+
 static int
 nv04_fifo_chan_ctor(struct nouveau_object *parent,
 		    struct nouveau_object *engine,
@@ -127,6 +135,7 @@ nv04_fifo_chan_ctor(struct nouveau_object *parent,
 
 	nv_parent(chan)->object_attach = nv04_fifo_object_attach;
 	nv_parent(chan)->object_detach = nv04_fifo_object_detach;
+	nv_parent(chan)->context_attach = nv04_fifo_context_attach;
 	chan->ramfc = chan->base.chid * 32;
 
 	nv_wo32(priv->ramfc, chan->ramfc + 0x00, args->offset);
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv10.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv10.c
index 391fefa7c47..5d3638bddb8 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv10.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv10.c
@@ -78,6 +78,7 @@ nv10_fifo_chan_ctor(struct nouveau_object *parent,
 
 	nv_parent(chan)->object_attach = nv04_fifo_object_attach;
 	nv_parent(chan)->object_detach = nv04_fifo_object_detach;
+	nv_parent(chan)->context_attach = nv04_fifo_context_attach;
 	chan->ramfc = chan->base.chid * 32;
 
 	nv_wo32(priv->ramfc, chan->ramfc + 0x00, args->offset);
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv17.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv17.c
index 3b9d6c97f9b..f223eb9c773 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv17.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv17.c
@@ -85,6 +85,7 @@ nv17_fifo_chan_ctor(struct nouveau_object *parent,
 
 	nv_parent(chan)->object_attach = nv04_fifo_object_attach;
 	nv_parent(chan)->object_detach = nv04_fifo_object_detach;
+	nv_parent(chan)->context_attach = nv04_fifo_context_attach;
 	chan->ramfc = chan->base.chid * 64;
 
 	nv_wo32(priv->ramfc, chan->ramfc + 0x00, args->offset);
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c
index 43d5c9eea86..ce97c5ee465 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c
@@ -128,11 +128,12 @@ nv40_fifo_context_attach(struct nouveau_object *parent,
 	}
 
 	spin_lock_irqsave(&priv->base.lock, flags);
+	nv_engctx(engctx)->addr = nv_gpuobj(engctx)->addr >> 4;
 	nv_mask(priv, 0x002500, 0x00000001, 0x00000000);
 
 	if ((nv_rd32(priv, 0x003204) & priv->base.max) == chan->base.chid)
-		nv_wr32(priv, reg, nv_gpuobj(engctx)->addr >> 4);
-	nv_wo32(priv->ramfc, chan->ramfc + ctx, nv_gpuobj(engctx)->addr >> 4);
+		nv_wr32(priv, reg, nv_engctx(engctx)->addr);
+	nv_wo32(priv->ramfc, chan->ramfc + ctx, nv_engctx(engctx)->addr);
 
 	nv_mask(priv, 0x002500, 0x00000001, 0x00000001);
 	spin_unlock_irqrestore(&priv->base.lock, flags);
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c
index 5b80f3e10a6..452f2241783 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv50.c
@@ -81,6 +81,7 @@ nv50_fifo_context_attach(struct nouveau_object *parent,
 		return -EINVAL;
 	}
 
+	nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
 	nv_wo32(base->eng, addr + 0x00, 0x00190000);
 	nv_wo32(base->eng, addr + 0x04, lower_32_bits(limit));
 	nv_wo32(base->eng, addr + 0x08, lower_32_bits(start));
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv84.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv84.c
index 694a9bbaa02..80c39270b58 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv84.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv84.c
@@ -62,6 +62,7 @@ nv84_fifo_context_attach(struct nouveau_object *parent,
 		return -EINVAL;
 	}
 
+	nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
 	nv_wo32(base->eng, addr + 0x00, 0x00190000);
 	nv_wo32(base->eng, addr + 0x04, lower_32_bits(limit));
 	nv_wo32(base->eng, addr + 0x08, lower_32_bits(start));
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
index a4ae2bfd603..d10dca237ca 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
@@ -112,6 +112,8 @@ nvc0_fifo_context_attach(struct nouveau_object *parent,
 					    NV_MEM_ACCESS_RW, &ectx->vma);
 		if (ret)
 			return ret;
+
+		nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
 	}
 
 	nv_wo32(base, addr + 0x00, lower_32_bits(ectx->vma.offset) | 4);
diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
index c3f4955fef5..042afadbdf2 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c
@@ -147,6 +147,8 @@ nve0_fifo_context_attach(struct nouveau_object *parent,
 					    NV_MEM_ACCESS_RW, &ectx->vma);
 		if (ret)
 			return ret;
+
+		nv_engctx(ectx)->addr = nv_gpuobj(base)->addr >> 12;
 	}
 
 	nv_wo32(base, addr + 0x00, lower_32_bits(ectx->vma.offset) | 4);
diff --git a/drivers/gpu/drm/nouveau/core/include/core/engctx.h b/drivers/gpu/drm/nouveau/core/include/core/engctx.h
index 3bc6ccd6cbd..227b2c190f1 100644
--- a/drivers/gpu/drm/nouveau/core/include/core/engctx.h
+++ b/drivers/gpu/drm/nouveau/core/include/core/engctx.h
@@ -13,6 +13,7 @@ struct nouveau_engctx {
 	struct nouveau_gpuobj base;
 	struct nouveau_vma vma;
 	struct list_head head;
+	u64 addr;
 };
 
 static inline struct nouveau_engctx *
diff --git a/drivers/gpu/drm/nouveau/core/include/engine/fifo.h b/drivers/gpu/drm/nouveau/core/include/engine/fifo.h
index f2133872bd7..d67fed1e397 100644
--- a/drivers/gpu/drm/nouveau/core/include/engine/fifo.h
+++ b/drivers/gpu/drm/nouveau/core/include/engine/fifo.h
@@ -106,5 +106,6 @@ extern struct nouveau_oclass nvc0_fifo_oclass;
 extern struct nouveau_oclass nve0_fifo_oclass;
 
 void nv04_fifo_intr(struct nouveau_subdev *);
+int  nv04_fifo_context_attach(struct nouveau_object *, struct nouveau_object *);
 
 #endif