drm/nouveau: make fifo.create_context() responsible for mapping control regs

The regs belong to PFIFO, they're different for pretty much the same
generations we need different PFIFO control for, and NVC0 is going
to be even more different than the rest.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv50_fifo.c b/drivers/gpu/drm/nouveau/nv50_fifo.c
index ed18952ae7f4..7add3dfde3df 100644
--- a/drivers/gpu/drm/nouveau/nv50_fifo.c
+++ b/drivers/gpu/drm/nouveau/nv50_fifo.c
@@ -261,6 +261,11 @@ nv50_fifo_create_context(struct nouveau_channel *chan)
         }
         ramfc = chan->ramfc;
 
+        chan->user = ioremap(pci_resource_start(dev->pdev, 0) +
+                             NV50_USER(chan->id), PAGE_SIZE);
+        if (!chan->user)
+                return -ENOMEM;
+
         spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 
         nv_wo32(ramfc, 0x48, chan->pushbuf->cinst >> 4);
@@ -327,6 +332,10 @@ nv50_fifo_destroy_context(struct nouveau_channel *chan)
         spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
 
         /* Free the channel resources */
+        if (chan->user) {
+                iounmap(chan->user);
+                chan->user = NULL;
+        }
         nouveau_gpuobj_ref(NULL, &ramfc);
         nouveau_gpuobj_ref(NULL, &chan->cache);
 }