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drm/amdkfd: Fix signal reset event

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When a mode reset happens, driver needs to notify the process on that
GPU a reset event is happening. The existing code assumes the process is
using the GPU that is getting mode reset, which is not always true. For
example, on a 8G system, the process may be only using GPU 0~4 but a
mode 2 reset is resetting the all 8 GPUs connected by XGMI. Trying to
find a process on GPU 5~7 will fail, which is fine and should skip the
event signal.

Signed-off-by: Amber Lin <amber.lin@amd.com>
Reviewed-by: David Yat Sin <david.yatsin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Amber Lin 2026-07-28 14:08:20 -04:00 committed by Alex Deucher
parent 5dafdd6492
commit b38f9b6ffd
1 changed files with 8 additions and 9 deletions
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17
drivers/gpu/drm/amd/amdkfd/kfd_events.c
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@ -1164,6 +1164,8 @@ void kfd_signal_reset_event(struct kfd_node *dev)
struct kfd_event *ev;
unsigned int temp;
uint32_t id, idx;
int user_gpu_id;
struct kfd_process_device *pdd;
int reset_cause = atomic_read(&dev->sram_ecc_flag) ?
KFD_HW_EXCEPTION_ECC :
KFD_HW_EXCEPTION_GPU_HANG;
@ -1179,17 +1181,14 @@ void kfd_signal_reset_event(struct kfd_node *dev)
idx = srcu_read_lock(&kfd_processes_srcu);
hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
int user_gpu_id = kfd_process_get_user_gpu_id(p, dev->id);
struct kfd_process_device *pdd = kfd_get_process_device_data(dev, p);
pdd = kfd_get_process_device_data(dev, p);
if (!pdd)
/* no process is using this device */
continue;
user_gpu_id = kfd_process_get_user_gpu_id(p, dev->id);
if (unlikely(user_gpu_id == -EINVAL)) {
WARN_ONCE(1, "Could not get user_gpu_id from dev->id:%x\n", dev->id);
continue;
}
if (unlikely(!pdd)) {
WARN_ONCE(1, "Could not get device data from process pid:%d\n",
p->lead_thread->pid);
WARN_ONCE(1, "Could not get user_gpu_id from dev->id:%d\n", dev->id);
continue;
}