• Yintian Tao's avatar
    drm/amdgpu: request reg_val_offs each kiq read reg · 54208194
    Yintian Tao authored
    According to the current kiq read register method,
    there will be race condition when using KIQ to read
    register if multiple clients want to read at same time
    just like the expample below:
    1. client-A start to read REG-0 throguh KIQ
    2. client-A poll the seqno-0
    3. client-B start to read REG-1 through KIQ
    4. client-B poll the seqno-1
    5. the kiq complete these two read operation
    6. client-A to read the register at the wb buffer and
       get REG-1 value
    
    Therefore, use amdgpu_device_wb_get() to request reg_val_offs
    for each kiq read register.
    
    v2: fix the error remove
    v3: fix the print typo
    v4: remove unused variables
    Signed-off-by: default avatarYintian Tao <yttao@amd.com>
    Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
    Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
    54208194
gfx_v8_0.c 240 KB