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drm/nouveau/disp: add supervisor mutex

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Will be used to protect NVIF_CLASS_OUTP method calls from racing with
in-progress supervisor handling.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ben Skeggs 2022-06-01 20:46:31 +10:00 committed by Dave Airlie
parent 32dd923669
commit a6fd8f9364
5 changed files with 21 additions and 4 deletions
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1
drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h
View file

@ -22,6 +22,7 @@ struct nvkm_disp {
struct workqueue_struct *wq;
struct work_struct work;
u32 pending;
struct mutex mutex;
} super;
#define NVKM_DISP_EVENT_CHAN_AWAKEN BIT(0)

6
drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
View file

@ -399,8 +399,11 @@ nvkm_disp_dtor(struct nvkm_engine *engine)
nvkm_gpuobj_del(&disp->inst);
nvkm_event_fini(&disp->uevent);
if (disp->super.wq)
if (disp->super.wq) {
destroy_workqueue(disp->super.wq);
mutex_destroy(&disp->super.mutex);
}
nvkm_event_fini(&disp->vblank);
nvkm_event_fini(&disp->hpd);
@ -467,6 +470,7 @@ nvkm_disp_new_(const struct nvkm_disp_func *func, struct nvkm_device *device,
return -ENOMEM;
INIT_WORK(&disp->super.work, func->super);
mutex_init(&disp->super.mutex);
}
return nvkm_event_init(func->uevent, 1, ARRAY_SIZE(disp->chan), &disp->uevent);

4
drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c
View file

@ -995,6 +995,8 @@ gf119_disp_super(struct work_struct *work)
u32 mask[4];
nvkm_debug(subdev, "supervisor %d\n", ffs(disp->super.pending));
mutex_lock(&disp->super.mutex);
list_for_each_entry(head, &disp->heads, head) {
mask[head->id] = nvkm_rd32(device, 0x6101d4 + (head->id * 0x800));
HEAD_DBG(head, "%08x", mask[head->id]);
@ -1037,7 +1039,9 @@ gf119_disp_super(struct work_struct *work)
list_for_each_entry(head, &disp->heads, head)
nvkm_wr32(device, 0x6101d4 + (head->id * 0x800), 0x00000000);
nvkm_wr32(device, 0x6101d0, 0x80000000);
mutex_unlock(&disp->super.mutex);
}
void

8
drivers/gpu/drm/nouveau/nvkm/engine/disp/gv100.c
View file

@ -818,8 +818,10 @@ gv100_disp_super(struct work_struct *work)
struct nvkm_subdev *subdev = &disp->engine.subdev;
struct nvkm_device *device = subdev->device;
struct nvkm_head *head;
u32 stat = nvkm_rd32(device, 0x6107a8);
u32 mask[4];
u32 stat, mask[4];
mutex_lock(&disp->super.mutex);
stat = nvkm_rd32(device, 0x6107a8);
nvkm_debug(subdev, "supervisor %d: %08x\n", ffs(disp->super.pending), stat);
list_for_each_entry(head, &disp->heads, head) {
@ -864,7 +866,9 @@ gv100_disp_super(struct work_struct *work)
list_for_each_entry(head, &disp->heads, head)
nvkm_wr32(device, 0x6107ac + (head->id * 4), 0x00000000);
nvkm_wr32(device, 0x6107a8, 0x80000000);
mutex_unlock(&disp->super.mutex);
}
static void

6
drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c
View file

@ -1345,7 +1345,10 @@ nv50_disp_super(struct work_struct *work)
struct nvkm_subdev *subdev = &disp->engine.subdev;
struct nvkm_device *device = subdev->device;
struct nvkm_head *head;
u32 super = nvkm_rd32(device, 0x610030);
u32 super;
mutex_lock(&disp->super.mutex);
super = nvkm_rd32(device, 0x610030);
nvkm_debug(subdev, "supervisor %08x %08x\n", disp->super.pending, super);
@ -1387,6 +1390,7 @@ nv50_disp_super(struct work_struct *work)
}
nvkm_wr32(device, 0x610030, 0x80000000);
mutex_unlock(&disp->super.mutex);
}
const struct nvkm_enum