drm/nouveau/intr: support multiple trees, and explicit interfaces

Turing adds a second top-level interrupt tree in HW, in addition to the
trees available via NV_PMC.  Most of the interrupts we care about are
exposed in both trees, but not all of them, and we have some rather
nasty hacks to route the fault buffer interrupts.

Ampere removes the NV_PMC trees entirely.

Here we add some infrastructure to be able to handle all of this more
cleanly, as well as providing more explicit control over handlers.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/device.h b/drivers/gpu/drm/nouveau/include/nvkm/core/device.h
index 6752a4c317e2..555e3fe06341 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/core/device.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/core/device.h
@@ -63,6 +63,8 @@ struct nvkm_device {
 	struct list_head subdev;
 
 	struct {
+		struct list_head intr;
+		struct list_head prio[NVKM_INTR_PRIO_NR];
 		spinlock_t lock;
 		int irq;
 		bool alloc;