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drm/xe/guc: Add kernel-doc for HXG Fast Request

We have kernel-doc for all HXG message types but Fast Request.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Acked-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610120411.1768-3-michal.wajdeczko@intel.com

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drivers/gpu/drm/xe/abi/guc_messages_abi.h
··· 92 92 #define GUC_HXG_REQUEST_MSG_n_DATAn GUC_HXG_MSG_n_PAYLOAD 93 93 94 94 /** 95 + * DOC: HXG Fast Request 96 + * 97 + * The `HXG Request`_ message should be used to initiate asynchronous activity 98 + * for which confirmation or return data is not expected. 99 + * 100 + * If confirmation is required then `HXG Request`_ shall be used instead. 101 + * 102 + * The recipient of this message may only use `HXG Failure`_ message if it was 103 + * unable to accept this request (like invalid data). 104 + * 105 + * Format of `HXG Fast Request`_ message is same as `HXG Request`_ except @TYPE. 106 + * 107 + * +---+-------+--------------------------------------------------------------+ 108 + * | | Bits | Description | 109 + * +===+=======+==============================================================+ 110 + * | 0 | 31 | ORIGIN - see `HXG Message`_ | 111 + * | +-------+--------------------------------------------------------------+ 112 + * | | 30:28 | TYPE = `GUC_HXG_TYPE_FAST_REQUEST`_ | 113 + * | +-------+--------------------------------------------------------------+ 114 + * | | 27:16 | DATA0 - see `HXG Request`_ | 115 + * | +-------+--------------------------------------------------------------+ 116 + * | | 15:0 | ACTION - see `HXG Request`_ | 117 + * +---+-------+--------------------------------------------------------------+ 118 + * |...| | DATAn - see `HXG Request`_ | 119 + * +---+-------+--------------------------------------------------------------+ 120 + */ 121 + 122 + /** 95 123 * DOC: HXG Event 96 124 * 97 125 * The `HXG Event`_ message should be used to initiate asynchronous activity