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tx.h (2310B)

      1 /*
      2  * 
      3  * This license is set out in https://raw.githubusercontent.com/Broadcom-Network-Switching-Software/OpenBCM/master/Legal/LICENSE file.
      4  * 
      5  * Copyright 2007-2020 Broadcom Inc. All rights reserved.
      6  *
      7  * File:        tx.h
      8  * Purpose:     
      9  */
     10 
     11 #ifndef   _BCM_INT_TX_H_
     12 #define   _BCM_INT_TX_H_
     13 
     14 #include <bcm/pkt.h>
     15 
     16 /* This is all the extra information associated with a DV for RX */
     17 typedef struct tx_dv_info_s {
     18     volatile bcm_pkt_t    **pkt;
     19     int                     pkt_count;
     20     volatile uint8          pkt_done_cnt;
     21     bcm_pkt_cb_f            chain_done_cb;
     22     void                   *cookie;
     23 } tx_dv_info_t;
     24 
     25 /*
     26  * TX DV INFO structure maintains information about a TX chain.
     27  * This includes:  Per packet callbacks and the chain done callback.
     28  *
     29  * Packets are processed in the order they return if any packet in
     30  * the chain requires a call back.  If none does, then only a chain
     31  * done callback is setup/made.
     32  *
     33  * A "current" packet is maintained in the order the packet's are
     34  * set up.  The packet-done interrupts will occur in this order.
     35  *
     36  * TX DV info macros:
     37  *     
     38  *    TX_INFO_SET(dv, val)      Assign the TX info ptr for a DV
     39  *    TX_INFO(dv)               Access the TX info ptr of a DV
     40  *    TX_INFO_PKT_ADD(dv)       Add pkt ptr to info struct; advance count
     41  *    TX_INFO_CUR_PKT(dv)       Pointer to "current" pkt done being processed
     42  *    TX_INFO_PKT_MARK_DONE(dv) Advances "current" packet.
     43  */
     44 
     45 #define TX_INFO_SET(dv, val)      ((dv)->dv_public1.ptr = val)
     46 #define TX_INFO(dv)               ((tx_dv_info_t *)((dv)->dv_public1.ptr))
     47 #define TX_INFO_PKT_ADD(dv, pkt) \
     48     TX_INFO(dv)->pkt[TX_INFO(dv)->pkt_count++] = (pkt)
     49 #define TX_INFO_CUR_PKT(dv)       (TX_INFO(dv)->pkt[TX_INFO(dv)->pkt_done_cnt])
     50 #define TX_INFO_PKT_MARK_DONE(dv) ((TX_INFO(dv)->pkt_done_cnt)++)
     51 
     52 #define TX_DV_NEXT(dv)            ((dv_t *)((dv)->dv_public2.ptr))
     53 #define TX_DV_NEXT_SET(dv, dv_next) \
     54     ((dv)->dv_public2.ptr = (void *)(dv_next))
     55 
     56 /*
     57  * Define:  TX_EXTRA_DCB_COUNT:
     58  *      The number of extra DCBs needed to accomodate portions of the
     59  * packet such as the HiGig header, SL tag, breaking up a block due
     60  * to VLAN tag insertion, etc.
     61  */
     62 #define TX_EXTRA_DCB_COUNT 6
     63 
     64 extern void
     65 _bcm_rcpu_tx_packet_done_cb(int unit, bcm_pkt_t *pkt);
     66 
     67 #endif	/* !_BCM_INT_TX_H_ */