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ce/gf100: fix incorrect CE0 address calculation on some GPUs 

The code which constructs the modules for each engine present on the GPU
passes -1 for 'instance' on non-instanced engines, which affects how the
name for a sub-device is generated.  This is then stored as 'instance 0'
in nvkm_subdev.inst, so code can potentially be shared with earlier GPUs
that only had a single instance of an engine.

However, GF100's CE constructor uses this value to calculate the address
of its falcon before it's translated, resulting in CE0 getting the wrong
address.

This slightly modifies the approach, always passing a valid instance for
engines that *can* have multiple copies, and having the code for earlier
GPUs explicitly ask for non-instanced name generation.

Bug: https://gitlab.freedesktop.org/drm/nouveau/-/issues/91

Fixes: 50551b15c7 ("drm/nouveau/ce: switch to instanced constructor")
Cc: <stable@vger.kernel.org> # v5.12+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Tested-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211103011057.15344-1-skeggsb@gmail.com
This commit is contained in:
Ben Skeggs 2021-11-03 11:10:57 +10:00 committed by Karol Herbst
parent 8244a3bc27
commit 93f43ed81a
2 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/nouveau/nvkm/engine/ce/gt215.c
View File

@ -78,6 +78,6 @@ int
gt215_ce_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_engine **pengine)
{
return nvkm_falcon_new_(&gt215_ce, device, type, inst,
return nvkm_falcon_new_(&gt215_ce, device, type, -1,
(device->chipset != 0xaf), 0x104000, pengine);
}

3
drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
View File

@ -3147,8 +3147,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
WARN_ON(device->chip->ptr.inst & ~((1 << ARRAY_SIZE(device->ptr)) - 1)); \
for (j = 0; device->chip->ptr.inst && j < ARRAY_SIZE(device->ptr); j++) { \
if ((device->chip->ptr.inst & BIT(j)) && (subdev_mask & BIT_ULL(type))) { \
int inst = (device->chip->ptr.inst == 1) ? -1 : (j); \
ret = device->chip->ptr.ctor(device, (type), inst, &device->ptr[j]); \
ret = device->chip->ptr.ctor(device, (type), (j), &device->ptr[j]); \
subdev = nvkm_device_subdev(device, (type), (j)); \
if (ret) { \
nvkm_subdev_del(&subdev); \