25  * descriptors from the tx and rx ring, thus processing one response at a time.
125  * 9     - SepRxHdrDescEn - place start of new frames only in descriptors
264  * @rxin_numd: Number of rx descriptors associated with the message that starts
328 	 * Arrays of PDC_RING_ENTRIES descriptors
335 	u32      ntxd;       /* # tx descriptors */
336 	u32      nrxd;       /* # rx descriptors */
359 	 * Number of tx descriptors associated with the message that starts
400 	u32  last_tx_not_done; /* too few tx descriptors to indicate done */
573  * Return:  PDC_SUCCESS if one or more receive descriptors was processed
615 	dev_dbg(dev, "PDC %u reclaimed %d tx descriptors",  in pdc_receive_one()
631 	dev_dbg(dev, "PDC %u reclaimed %d rx descriptors",  in pdc_receive_one()
694  * descriptors for a given SPU. The scatterlist buffers contain the data for a
699  * If a scatterlist buffer is larger than PDC_DMA_BUF_MAX, multiple descriptors
712 	 * Num descriptors needed. Conservatively assume we need a descriptor  in pdc_tx_list_sg_add()
716 	u32 desc_w = 0;	/* Number of tx descriptors written */  in pdc_tx_list_sg_add()
722 	/* check whether enough tx descriptors are available */  in pdc_tx_list_sg_add()
730 	/* build tx descriptors */  in pdc_tx_list_sg_add()
746 		 * multiple descriptors  in pdc_tx_list_sg_add()
861  * descriptors for a given SPU. The caller must have already DMA mapped the
867  * multiple receive descriptors are written, each with a buffer <=
879 	 * Num descriptors needed. Conservatively assume we need a descriptor  in pdc_rx_list_sg_add()
883 	u32 desc_w = 0;	/* Number of tx descriptors written */  in pdc_rx_list_sg_add()
904 		 * multiple descriptors  in pdc_rx_list_sg_add()
976  * descriptors in one ringset.
1052 	/* Initialize descriptors */  in pdc_ring_init()
1098  * pdc_desc_count() - Count the number of DMA descriptors that will be required
1101  * Return: Number of descriptors required
1115  * pdc_rings_full() - Check whether the tx ring has room for tx_cnt descriptors
1116  * and the rx ring has room for rx_cnt descriptors.
1118  * @tx_cnt: The number of descriptors required in the tx ring
1119  * @rx_cnt: The number of descriptors required i the rx ring
1151  * PDC_RING_SPACE_MIN descriptors available, then indicate that the mailbox
1180  * creates a sequence of receive descriptors in the rx ring. From the source
1181  * scatterlist, it creates a sequence of transmit descriptors in the tx ring.
1182  * After creating the descriptors, it writes the rx ptr and tx ptr registers to
1228 	 * writing any tx or rx descriptors. Need to ensure that we do not write  in pdc_send_data()
1229 	 * a partial set of descriptors, or write just rx descriptors but  in pdc_send_data()
1230 	 * corresponding tx descriptors don't fit. Note that we want this check  in pdc_send_data()
1240 	/* Create rx descriptors to SPU catch response */  in pdc_send_data()
1244 	/* Create tx descriptors to submit SPU request */  in pdc_send_data()