• Michal Wajdeczko's avatar
    drm/i915/guc: Implement response handling in send_ct() · 9ef4c75e
    Michal Wajdeczko authored
    Instead of returning small data in response status dword,
    GuC may append longer data as response message payload.
    If caller provides response buffer, we will copy received
    data and use number of received data dwords as new success
    return value. We will WARN if response from GuC does not
    match caller expectation.
    
    v2: fix timeout and checkpatch warnings (Michal)
    v3: fix checkpatch again (Michel)
        update wait function name (Michal)
        no need for spinlock_irqsave (MichalWi)
        no magic numbers (MichalWi)
        must check before use (Jani)
        add some more documentation (Michal)
    v4: update documentation (Michal)
    Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
    Cc: Oscar Mateo <oscar.mateo@intel.com>
    Cc: Michel Thierry <michel.thierry@intel.com>
    Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
    Reviewed-by: Michel Thierry <michel.thierry@intel.com> #2.5
    Cc: Michal Winiarski <michal.winiarski@intel.com>
    Cc: Jani Nikula <jani.nikula@intel.com>
    Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
    Link: https://patchwork.freedesktop.org/patch/msgid/20180327121439.70096-1-michal.wajdeczko@intel.com
    9ef4c75e
intel_guc_ct.h 2.91 KB