HP UX 11i v1 I/O Cards manual Ipendgbufs

ZCOM Tables and Data Structures

Interface Table

TXCX_HEAD - Pointer to head of the express queue linked lists

TXCA_HEAD - Pointer to head of the high-priority queue linked lists

TXCB_HEAD - Pointer to head of the low-priority queue linked lists

ITXLSTX - Pointer to express terminal list array (in union)

ITXLSTA - Pointer to high-priority terminal list array (in union)

ITXLSTB - Pointer to low-priority terminal list array (in union)

IPLIMIT - Pointer to port/subchannel unack Tx limit array (in union)

IPBYTES - Pointer to port/subchannel unack Tx size array (in union)

IPSTAT - Pointer to port/subchannel status array (in union)

IPCNTR - Pointer to # of terminals per port/subchannel array (in union) IPORTN - Pointer to port configuration array (in union)

IFPLOOK - Pointer to PTT interrupt vector array.

IFCMDBP - Pointer to current backplane command buffer (in union)

These fields are used internally by the ZCOM subsystem.

CARD - Interface card specific data structures (union)

This field is a union which contains two structures. These structures hold information that are specific to the type of interface card associated with this IFT entry. The structure card.mmp is used if the IFT is associated with an 8-port PCI or E1/T1 interface card. Otherwise, the card.bsp structure is used for 2/8-channel NIO and EISA interface cards.

CARD.MMP has the following fields shown in Table 3-16.

Table 3-16	CARD.MMP Structure
Field Name		Field Description	Field Type	Size
				(Bytes)
itxlstx		Express terminal list headers	struct[128]	128*40
itxlsta		High priority terminal list headers	struct[128]	128*40
itxlstb		Low priority terminal list headers	struct[128]	128*40
iplimit		Port unack TX limit (in bytes)	uns.int [128]	128*4
ipbytes		Port unack TX size (in bytes)	int [128]	128*4
ipendg_bufs		Total pending Tx size (in bufrs)	int [128]	128*4

82 Chapter 3