On 18/09/2024 09:50, Mary Guillemard wrote:
> Keep track of the csg priority in panthor_group when the group is
> scheduled/active.
>
> This is useful to know the actual priority in use in the firmware
> group slot.
>
> Signed-off-by: Mary Guillemard <mary.guillemard@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/panthor/panthor_sched.c | 18 +++++++++++++++---
> 1 file changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> index 86908ada7335..f15abeef4ece 100644
> --- a/drivers/gpu/drm/panthor/panthor_sched.c
> +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> @@ -574,6 +574,13 @@ struct panthor_group {
> */
> int csg_id;
>
> + /**
> + * @csg_id: Priority of the FW group slot.
kerneldoc name is wrong: s/csg_id/csg_priority/
Otherwise this looks reasonable, but see my reply to the second patch.
Thanks,
Steve
> + *
> + * -1 when the group is not scheduled/active.
> + */
> + int csg_priority;
> +
> /**
> * @destroyed: True when the group has been destroyed.
> *
> @@ -894,11 +901,12 @@ group_get(struct panthor_group *group)
> * group_bind_locked() - Bind a group to a group slot
> * @group: Group.
> * @csg_id: Slot.
> + * @csg_priority: Priority of the slot.
> *
> * Return: 0 on success, a negative error code otherwise.
> */
> static int
> -group_bind_locked(struct panthor_group *group, u32 csg_id)
> +group_bind_locked(struct panthor_group *group, u32 csg_id, u32 csg_priority)
> {
> struct panthor_device *ptdev = group->ptdev;
> struct panthor_csg_slot *csg_slot;
> @@ -917,6 +925,7 @@ group_bind_locked(struct panthor_group *group, u32 csg_id)
> csg_slot = &ptdev->scheduler->csg_slots[csg_id];
> group_get(group);
> group->csg_id = csg_id;
> + group->csg_priority = csg_priority;
>
> /* Dummy doorbell allocation: doorbell is assigned to the group and
> * all queues use the same doorbell.
> @@ -956,6 +965,7 @@ group_unbind_locked(struct panthor_group *group)
> slot = &ptdev->scheduler->csg_slots[group->csg_id];
> panthor_vm_idle(group->vm);
> group->csg_id = -1;
> + group->csg_priority = -1;
>
> /* Tiler OOM events will be re-issued next time the group is scheduled. */
> atomic_set(&group->tiler_oom, 0);
> @@ -2193,8 +2203,9 @@ tick_ctx_apply(struct panthor_scheduler *sched, struct panthor_sched_tick_ctx *c
>
> csg_iface = panthor_fw_get_csg_iface(ptdev, csg_id);
> csg_slot = &sched->csg_slots[csg_id];
> - group_bind_locked(group, csg_id);
> - csg_slot_prog_locked(ptdev, csg_id, new_csg_prio--);
> + group_bind_locked(group, csg_id, new_csg_prio);
> + csg_slot_prog_locked(ptdev, csg_id, new_csg_prio);
> + new_csg_prio--;
> csgs_upd_ctx_queue_reqs(ptdev, &upd_ctx, csg_id,
> group->state == PANTHOR_CS_GROUP_SUSPENDED ?
> CSG_STATE_RESUME : CSG_STATE_START,
> @@ -3111,6 +3122,7 @@ int panthor_group_create(struct panthor_file *pfile,
> kref_init(&group->refcount);
> group->state = PANTHOR_CS_GROUP_CREATED;
> group->csg_id = -1;
> + group->csg_priority = -1;
>
> group->ptdev = ptdev;
> group->max_compute_cores = group_args->max_compute_cores;
