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drm/panthor: Force an immediate reset on unrecoverable faults

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If the FW reports an unrecoverable fault, we need to reset the GPU
before we can start re-using it again.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240502183813.1612017-2-boris.brezillon@collabora.com
This commit is contained in:
Boris Brezillon 2024-05-02 20:38:09 +02:00
parent 591eafcd46
commit 2b2a26b331
3 changed files with 12 additions and 1 deletions
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1
drivers/gpu/drm/panthor/panthor_device.c
View File

@ -293,6 +293,7 @@ static const struct panthor_exception_info panthor_exception_infos[] = {
PANTHOR_EXCEPTION(ACTIVE),
PANTHOR_EXCEPTION(CS_RES_TERM),
PANTHOR_EXCEPTION(CS_CONFIG_FAULT),
PANTHOR_EXCEPTION(CS_UNRECOVERABLE),
PANTHOR_EXCEPTION(CS_ENDPOINT_FAULT),
PANTHOR_EXCEPTION(CS_BUS_FAULT),
PANTHOR_EXCEPTION(CS_INSTR_INVALID),

1
drivers/gpu/drm/panthor/panthor_device.h
View File

@ -216,6 +216,7 @@ enum drm_panthor_exception_type {
DRM_PANTHOR_EXCEPTION_CS_RES_TERM = 0x0f,
DRM_PANTHOR_EXCEPTION_MAX_NON_FAULT = 0x3f,
DRM_PANTHOR_EXCEPTION_CS_CONFIG_FAULT = 0x40,
DRM_PANTHOR_EXCEPTION_CS_UNRECOVERABLE = 0x41,
DRM_PANTHOR_EXCEPTION_CS_ENDPOINT_FAULT = 0x44,
DRM_PANTHOR_EXCEPTION_CS_BUS_FAULT = 0x48,
DRM_PANTHOR_EXCEPTION_CS_INSTR_INVALID = 0x49,

11
drivers/gpu/drm/panthor/panthor_sched.c
View File

@ -1281,7 +1281,16 @@ cs_slot_process_fatal_event_locked(struct panthor_device *ptdev,
if (group)
group->fatal_queues |= BIT(cs_id);
sched_queue_delayed_work(sched, tick, 0);
if (CS_EXCEPTION_TYPE(fatal) == DRM_PANTHOR_EXCEPTION_CS_UNRECOVERABLE) {
/* If this exception is unrecoverable, queue a reset, and make
* sure we stop scheduling groups until the reset has happened.
*/
panthor_device_schedule_reset(ptdev);
cancel_delayed_work(&sched->tick_work);
} else {
sched_queue_delayed_work(sched, tick, 0);
}
drm_warn(&ptdev->base,
"CSG slot %d CS slot: %d\n"
"CS_FATAL.EXCEPTION_TYPE: 0x%x (%s)\n"