[AMD Official Use Only - General] Ping....
----------------- Best Regards, Thomas -----Original Message----- From: Chai, Thomas <[email protected]> Sent: Thursday, September 1, 2022 4:40 PM To: [email protected] Cc: Chai, Thomas <[email protected]>; Zhang, Hawking <[email protected]>; Zhou1, Tao <[email protected]>; Chai, Thomas <[email protected]> Subject: [PATCH V2] drm/amdgpu: TA unload messages are not actually sent to psp when amdgpu is uninstalled V1: The psp_cmd_submit_buf function is called by psp_hw_fini to send TA unload messages to psp to terminate ras, asd and tmr. But when amdgpu is uninstalled, drm_dev_unplug is called earlier than psp_hw_fini in amdgpu_pci_remove, the calling order as follows: static void amdgpu_pci_remove(struct pci_dev *pdev) { drm_dev_unplug ...... amdgpu_driver_unload_kms->amdgpu_device_fini_hw->... ->.hw_fini->psp_hw_fini->... ->psp_ta_unload->psp_cmd_submit_buf ...... } The program will return when calling drm_dev_enter in psp_cmd_submit_buf. So the call to drm_dev_enter in psp_cmd_submit_buf should be removed, so that the TA unload messages can be sent to the psp when amdgpu is uninstalled. V2: 1. Restore psp_cmd_submit_buf to its original code. 2. Move drm_dev_unplug call after amdgpu_driver_unload_kms in amdgpu_pci_remove. 3. Since amdgpu_device_fini_hw is called by amdgpu_driver_unload_kms, remove the unplug check to release device mmio resource in amdgpu_device_fini_hw before calling drm_dev_unplug. Signed-off-by: YiPeng Chai <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +-- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++-- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index afaa1056e039..62b26f0e37b0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -3969,8 +3969,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev) amdgpu_gart_dummy_page_fini(adev); - if (drm_dev_is_unplugged(adev_to_drm(adev))) - amdgpu_device_unmap_mmio(adev); + amdgpu_device_unmap_mmio(adev); } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index de7144b06e93..728a0933ea6f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -2181,8 +2181,6 @@ amdgpu_pci_remove(struct pci_dev *pdev) struct drm_device *dev = pci_get_drvdata(pdev); struct amdgpu_device *adev = drm_to_adev(dev); - drm_dev_unplug(dev); - if (adev->pm.rpm_mode != AMDGPU_RUNPM_NONE) { pm_runtime_get_sync(dev->dev); pm_runtime_forbid(dev->dev); @@ -2190,6 +2188,8 @@ amdgpu_pci_remove(struct pci_dev *pdev) amdgpu_driver_unload_kms(dev); + drm_dev_unplug(dev); + /* * Flush any in flight DMA operations from device. * Clear the Bus Master Enable bit and then wait on the PCIe Device -- 2.25.1
