drm/amdgpu: Adjust removal control flow for smu v13_0_2
Adjust removal control flow for smu v13_0_2: During amdgpu uninstallation, when removing the first device, the kernel needs to first send a mode1reset message to all gpu devices. Otherwise, smu initialization will fail the next time amdgpu is installed. V2: 1. Update commit comments. 2. Remove the global variable amdgpu_device_remove_cnt and add a variable to the structure amdgpu_hive_info. 3. Use hive to detect the first removed device instead of a global variable. V3: 1. Update commit comments. 2. Split a patch into multiple patches. 3. The current patch does: a. Add a work mode of AMDGPU_RESET_FOR_DEVICE_REMOVE into the existing gpu recover path, which make all devices in hive list only have HW reset but no resume (except the base IP). b. Call AMDGPU_RESET_FOR_DEVICE_REMOVE and AMDGPU_NEED_FULL_RESET mode of amdgpu_device_gpu_recover in amdgpu_pci_remove when removing the first device in hive list. c. When removing the first device, the IP blocks keyword function call sequence is as follows: .suspend->mode1reset->.resume(basic ip)->.hw_fini->.early_fini->.sw_fini. ^ | |-<----------<---------<----| The first three sequences are because of a call to amdgpu_device_gpu_recover. The three sequences will be executed in a loop until all devices in the hive list are iterated. The sequences starting from .hw_fini only apply to the first device. Since .suspend has been called before, except the resumed phase1 basic ip blocks, all other ip blocks .hw_fini of current device will do nothing. d. When removing other devices, the calling sequences is the same as legacy: .hw_fini -> .early_fini -> .sw_fini. Since .suspend has been called when removing the first device, except the resumed phase1 basic ip blocks, all of other ip blocks .hw_fini of current device will do nothing. Signed-off-by:YiPeng Chai <YiPeng.Chai@amd.com> Reviewed-by:
Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com>
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