DSAXlate

The Direct Select Address (DSA) may be coded in word 7 of the reference code.

About this task

This is either a PCI system bus number or a RIO loop number, depending on the type of error. With the information obtained here, and the information in either the card position table (for PCI bus numbers) or the information in the loop-number-to-NIC-port table (for RIO loop numbers), you should be able to isolate a failing PCI bus or RIO loop. Follow the instructions below to translate the DSA:

1. Break down the DSA into the bus number, multi-adapter bridge number, and multi-adapter bridge function number as shown in the tables that follow. The DSA is of the form BBBB Ccxx, and breaks down into the following parts:
   • BBBB = bus number
   • C = multi-adapter bridge number
   • c = multi-adapter bridge function number
   • xx = not used
2. Is the bus number less than 0684?
   • Yes, the bus number is a PCI bus number. Refer to Table 1 to convert the number to decimal, and then continue with the next step.
   • No, the bus number is a RIO loop number. Refer to Table 2 to convert the number to decimal, and then continue with the next step.
3. To determine if the bus is located in the system unit or expansion unit, view the managed system's properties on the HMC.
4. Perform one of the following:
   • Refer to Table 3 and Table 4 to search for the bus number, the multi-adapter bridge number, and the multi-adapter bridge function number that matches the system unit or I/O tower type where the bus is located. This ends the procedure.
   • Refer to Converting the loop number to NIC port location labels to determine the starting ports for the RIO loop with the failed link. This ends the procedure.

Results

Table 1. PCI bus numbers

Bus number in hexadecimal (BBBB)	Bus number in decimal	Multi-adapter bridge number (C)	Multi-adapter bridge function number (c)
0001	1	1	0 through 7
0001	1	2	0 through 7
0001	1	7	0
0002 - 0007	2 - 7	1	0 through 7
0002 - 0007	2 - 7	2	0 through 7
0008 and 0009	8 through 9 (not used)
0016 through 03FF	16 through 1023	1	0 through 7
0016 through 03FFF	16 through 1023	2	0 through 7

Table 2. RIO loop numbers

Bus number in hexadecimal (BBBB)	RIO loop number in decimal	RIO loop number as seen in i5/OS HSM
0684 through 0689	1668 through 1673	668 through 673
068A through 068F	1674 through 1679	674 through 679
0690 through 0699	1680 through 1689	680 through 689
069A through 069F	1690 through 1695	690 through 695
06A0 through 06A9	1696 through 1705	696 through 705
06AA through 06AF	1706 through 1711	706 through 711
06B0 through 06B9	1712 through 1721	712 through 721
06BA through 06BF	1722 through 1727	722 through 727
06C0 through 06C9	1728 through 1737	728 through 737
06CA through 06CF	1738 through 1743	738 through 743
06D0 through 06D9	1744 through 1753	744 through 753
06DA through 06DF	1754 through 1759	754 through 759
06E0 through 06E9	1760 through 1769	760 through 769
06EA through 06EF	1770 through 1775	770 through 775
06F0 through 06F9	1776 through 1785	776 through 785
06FA through 06FF	1786 through 1791	786 through 791
0700 through 0709	1792 through 1801	792 through 801
070A through 070F	1802 through 1807	802 through 807
0710 through 0719	1808 through 1817	808 through 817
071A through 071F	1818 through 1823	818 through 823
0720 through 0729	1824 through 1833	824 through 833
072A through 072F	1834 through 1839	834 through 839
0730 through 0739	1840 through 1849	840 through 849
073A through 073F	1850 through 1855	850 through 855
0740 through 0749	1856 through 1865	856 through 865
074A through 074F	1866 through 1871	866 through 871
0750 through 0759	1872 through 1881	872 through 881
075A through 075F	1882 through 1887	882 through 887
0760 through 0769	1888 through 1897	888 through 897
076A through 076F	1898 through 1903	898 through 903
0770 through 0779	1904 through 1913	904 through 913
077A through 077F	1914 through 1919	914 through 919
0780 through 0789	1920 through 1929	920 through 929
078A through 078F	1930 through 1935	930 through 935
0790 through 0799	1936 through 1945	936 through 945
079A through 079F	1946 through 1951	946 through 951
07A0 through 07A9	1952 through 1961	952 through 961
07AA through 07AF	1962 through 1967	962 through 967
07B0 through 07B9	1968 through 1977	968 through 977
07BA through 07BF	1978 through 1983	978 through 983
07C0 through 07C9	1984 through 1993	984 through 993
07CA through 07CF	1994 through 1999	994 through 999
07D0 through 07D9	2000 through 2009	000 through 009
07DA through 07DF	2010 through 2015	010 through 015
07E0 through 07E9	2016 through 2025	016 through 025
07EA through 07EF	2026 through 2031	026 through 031
07F0 through 07F9	2032 through 2041	032 through 041
07FA through 07FE	2042 through 2046	042 through 046

Table 3. Card positions for CEC enclosure

Bus number in DSA (hexadecimal)	Multi-adapter bridge number in DSA	Multi-adapter bridge function number in DSA	Item DSA points to	Position label and PCI data width
0001	7	0	Service processor	-P1-C8
	2	0	Embedded SCSI controller	-P1 (64 bit)
	2	1
	2	2	Embedded USB controller	-P1 (32 bit)
	2	3	Embedded serial adapter	-P1 (32 bit)
	2	4	Embedded Ethernet controller	-P1 (64 bit)
	2	5
	2	6	Unused	-P1-T10 (64 bit)
	2	7
	2	F	Multi-adapter bridge	-P1
0002	2	0	PCI IOP or IOA card	-P1-C3 (64 bit)
	2	1
	2	2		-P1-C4 (64 bit)
	2	3
	2	4		-P1-C5 (64 bit)
	2	5
	2	6	PCI IOA card	-P1-C6 (64 bit)
	2	7
	2	F	Multi-adapter bridge	-P1
0003	2	0	PCI IOP or IOA card	-P1-C1 (64 bit)
	2	1
	2	2	Embedded SCSI controller	-P1 (64 bit)
	2	3
	2	4	Embedded IDE controller	-P1 (32 bit)
	2	5	Unused	-P1 (32 bit)
	2	6	PCI IOA card	-P1-C2 (64 bit)
	2	7
	2	F	Multi-adapter bridge	-P1

Table 4. Card positions for I/O enclosure

Bus number in DSA (hexadecimal)	Multi-adapter bridge number in DSA	Multi-adapter bridge function number in DSA	Item DSA points to	Position label and PCI data width
Lower PCI bus number	2	0	PCI IOA card	-P1-C1 (64 bit)
Lower PCI bus number	2	1
Lower PCI bus number	2	2	PCI IOA card	-P1-C2 (64 bit)
Lower PCI bus number	2	3
Lower PCI bus number	2	4	Unused	n/a
Lower PCI bus number	2	5
Lower PCI bus number	2	6	PCI IOA card	-P1-C3 (64 bit)
Lower PCI bus number	2	7
Lower PCI bus number	2	F	Multi-adapter bridge	-P1
Higher PCI bus number	2	0	PCI IOA card	-P1-C4 (64 bit)
Higher PCI bus number	2	1
Higher PCI bus number	2	2	PCI IOA card	-P1-C5 (64 bit)
Higher PCI bus number	2	3
Higher PCI bus number	2	4	Unused	n/a
Higher PCI bus number	2	5
Higher PCI bus number	2	6	PCI IOA card	-P1-C6 (64 bit)
Higher PCI bus number	2	7
Higher PCI bus number	2	F	Multi-adapter bridge	-P1