diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_process.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_process.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 3c72e9dc6422..b8db509e2bbd 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -1193,6 +1193,56 @@ void kfd_process_set_trap_handler(struct qcm_process_device *qpd, } } +bool kfd_process_xnack_mode(struct kfd_process *p, bool supported) +{ + int i; + + /* On most GFXv9 GPUs, the retry mode in the SQ must match the + * boot time retry setting. Mixing processes with different + * XNACK/retry settings can hang the GPU. + * + * Different GPUs can have different noretry settings depending + * on HW bugs or limitations. We need to find at least one + * XNACK mode for this process that's compatible with all GPUs. + * Fortunately GPUs with retry enabled (noretry=0) can run code + * built for XNACK-off. On GFXv9 it may perform slower. + * + * Therefore applications built for XNACK-off can always be + * supported and will be our fallback if any GPU does not + * support retry. + */ + for (i = 0; i < p->n_pdds; i++) { + struct kfd_dev *dev = p->pdds[i]->dev; + + /* Only consider GFXv9 and higher GPUs. Older GPUs don't + * support the SVM APIs and don't need to be considered + * for the XNACK mode selection. + */ + if (dev->device_info->asic_family < CHIP_VEGA10) + continue; + /* Aldebaran can always support XNACK because it can support + * per-process XNACK mode selection. But let the dev->noretry + * setting still influence the default XNACK mode. + */ + if (supported && + dev->device_info->asic_family == CHIP_ALDEBARAN) + continue; + + /* GFXv10 and later GPUs do not support shader preemption + * during page faults. This can lead to poor QoS for queue + * management and memory-manager-related preemptions or + * even deadlocks. + */ + if (dev->device_info->asic_family >= CHIP_NAVI10) + return false; + + if (dev->noretry) + return false; + } + + return true; +} + /* * On return the kfd_process is fully operational and will be freed when the * mm is released @@ -1232,6 +1282,9 @@ static struct kfd_process *create_process(const struct task_struct *thread) if (err != 0) goto err_init_apertures; + /* Check XNACK support after PDDs are created in kfd_init_apertures */ + process->xnack_enabled = kfd_process_xnack_mode(process, false); + err = svm_range_list_init(process); if (err) goto err_init_svm_range_list; |