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authorMaarten Maathuis <madman2003@gmail.com>2010-02-01 18:32:09 +0100
committerBen Skeggs <bskeggs@redhat.com>2010-02-10 08:19:36 +1000
commita51a3bf50d41708388f51ce63d965c0e77726eab (patch)
treec3994c549c3d8349603083ee2cf96aebb5c47d44
parenteb1dba0ebaa5b7642b323fac148f9947522a48a8 (diff)
drm/nv50: avoid unloading pgraph context when ctxprog is running
- We need to disable pgraph fifo access before checking the current channel, otherwise we could still hit a running ctxprog. - The writes to 0x400500 are already handled by pgraph->fifo_access and are therefore redundant, moreover pgraph fifo access should not be reenabled before current context is set as invalid. So remove them altogether. Signed-off-by: Maarten Maathuis <madman2003@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_channel.c7
-rw-r--r--drivers/gpu/drm/nouveau/nv50_graph.c10
2 files changed, 10 insertions, 7 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_channel.c b/drivers/gpu/drm/nouveau/nouveau_channel.c
index 343d718a9667..2281f99da7fc 100644
--- a/drivers/gpu/drm/nouveau/nouveau_channel.c
+++ b/drivers/gpu/drm/nouveau/nouveau_channel.c
@@ -278,12 +278,11 @@ nouveau_channel_free(struct nouveau_channel *chan)
/* Ensure the channel is no longer active on the GPU */
pfifo->reassign(dev, false);
- if (pgraph->channel(dev) == chan) {
- pgraph->fifo_access(dev, false);
+ pgraph->fifo_access(dev, false);
+ if (pgraph->channel(dev) == chan)
pgraph->unload_context(dev);
- pgraph->fifo_access(dev, true);
- }
pgraph->destroy_context(chan);
+ pgraph->fifo_access(dev, true);
if (pfifo->channel_id(dev) == chan->id) {
pfifo->disable(dev);
diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c
index 20319e59d368..6d504801b514 100644
--- a/drivers/gpu/drm/nouveau/nv50_graph.c
+++ b/drivers/gpu/drm/nouveau/nv50_graph.c
@@ -165,6 +165,12 @@ nv50_graph_channel(struct drm_device *dev)
uint32_t inst;
int i;
+ /* Be sure we're not in the middle of a context switch or bad things
+ * will happen, such as unloading the wrong pgraph context.
+ */
+ if (!nv_wait(0x400300, 0x00000001, 0x00000000))
+ NV_ERROR(dev, "Ctxprog is still running\n");
+
inst = nv_rd32(dev, NV50_PGRAPH_CTXCTL_CUR);
if (!(inst & NV50_PGRAPH_CTXCTL_CUR_LOADED))
return NULL;
@@ -275,7 +281,7 @@ nv50_graph_load_context(struct nouveau_channel *chan)
int
nv50_graph_unload_context(struct drm_device *dev)
{
- uint32_t inst, fifo = nv_rd32(dev, 0x400500);
+ uint32_t inst;
inst = nv_rd32(dev, NV50_PGRAPH_CTXCTL_CUR);
if (!(inst & NV50_PGRAPH_CTXCTL_CUR_LOADED))
@@ -283,12 +289,10 @@ nv50_graph_unload_context(struct drm_device *dev)
inst &= NV50_PGRAPH_CTXCTL_CUR_INSTANCE;
nouveau_wait_for_idle(dev);
- nv_wr32(dev, 0x400500, fifo & ~1);
nv_wr32(dev, 0x400784, inst);
nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) | 0x20);
nv_wr32(dev, 0x400304, nv_rd32(dev, 0x400304) | 0x01);
nouveau_wait_for_idle(dev);
- nv_wr32(dev, 0x400500, fifo);
nv_wr32(dev, NV50_PGRAPH_CTXCTL_CUR, inst);
return 0;