diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_device.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index ac0fdaa1ea23..9b49563f2c42 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c @@ -1521,6 +1521,73 @@ bool kgd2kfd_compute_active(struct kfd_dev *kfd, uint32_t node_id) return kfd_compute_active(node); } +/** + * kgd2kfd_vmfault_fast_path() - KFD vm page fault interrupt handling fast path for gmc v9 + * @adev: amdgpu device + * @entry: vm fault interrupt vector + * @retry_fault: if this is retry fault + * + * retry fault - + * with CAM enabled, adev primary ring + * | gmc_v9_0_process_interrupt() + * adev soft_ring + * | gmc_v9_0_process_interrupt() worker failed to recover page fault + * KFD node ih_fifo + * | KFD interrupt_wq worker + * kfd_signal_vm_fault_event + * + * without CAM, adev primary ring1 + * | gmc_v9_0_process_interrupt worker failed to recvoer page fault + * KFD node ih_fifo + * | KFD interrupt_wq worker + * kfd_signal_vm_fault_event + * + * no-retry fault - + * adev primary ring + * | gmc_v9_0_process_interrupt() + * KFD node ih_fifo + * | KFD interrupt_wq worker + * kfd_signal_vm_fault_event + * + * fast path - After kfd_signal_vm_fault_event, gmc_v9_0_process_interrupt drop the page fault + * of same process, don't copy interrupt to KFD node ih_fifo. + * With gdb debugger enabled, need convert the retry fault to no-retry fault for + * debugger, cannot use the fast path. + * + * Return: + * true - use the fast path to handle this fault + * false - use normal path to handle it + */ +bool kgd2kfd_vmfault_fast_path(struct amdgpu_device *adev, struct amdgpu_iv_entry *entry, + bool retry_fault) +{ + struct kfd_process *p; + u32 cam_index; + + if (entry->ih == &adev->irq.ih_soft || entry->ih == &adev->irq.ih1) { + p = kfd_lookup_process_by_pasid(entry->pasid); + if (!p) + return true; + + if (p->gpu_page_fault && !p->debug_trap_enabled) { + if (retry_fault && adev->irq.retry_cam_enabled) { + cam_index = entry->src_data[2] & 0x3ff; + WDOORBELL32(adev->irq.retry_cam_doorbell_index, cam_index); + } + + kfd_unref_process(p); + return true; + } + + /* + * This is the first page fault, set flag and then signal user space + */ + p->gpu_page_fault = true; + kfd_unref_process(p); + } + return false; +} + #if defined(CONFIG_DEBUG_FS) /* This function will send a package to HIQ to hang the HWS |