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\ Hypervisor Software File: classifier.fth
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id: @(#)classifier.fth 1.1 07/01/23
copyright: Copyright 2007 Sun Microsystems, Inc. All Rights Reserved
copyright: Use is subject to license terms.
d# 8 constant #rdc-tables
d# 16 constant #rdc-tbl-entries
\ Set all bits, including VPR0,1(,2,3), to 0 so that MAC/VLAN
\ preference is in favor of MAC
d# 4096 0 do 0 i enet-vlan-tbl-i! loop
\ STAT will be set to 1 when read/write operation completes.
: wait-tcam-done ( -- flag )
tcam-ctl@ stat-done and 0<>
\ Clear four TCAM_KEY registers. The 0 value in these registers
\ will be written to TCAM. (bits[194:0] of the TCAM do not matter
\ because of our setting of the TCAM_MASK_i registers, but set them
h# ffff.ffff tcam-key-mask-0!
\ Write the value (0) in TCAM_KEY regs to location i of the
\ TCAM. bit stat-start==0 causes HW to start writing.
rwc-write stat-start or i or tcam-ctl! \ TCAM_CTL.LOC = i
d# 100 ['] wait-tcam-done wait-status
cmn-error[ " Tcam access failed" ]cmn-end drop unloop
\ There are 128 Rx DMA table (RDC_TBL) entries, 16 for each of
\ 8 RDC tables. We initialize the tables as follows:
\ ith RDC Table has the ith Rx channel for all 16 entires,
\ including the first entry as the default channel for that
\ RDC Table 0 entry 0~15: {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
\ RDC Table 1 entry 0~15: {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
\ RDC Table 2 entry 0~15: {2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2}
\ RDC Table 3 entry 0~15: {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3}
\ RDC Table 7 entry 0~15: {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7}
\ i = 0~127, for Table 0, i= 0 ~ 15, i/16 ==> quot=0
\ for Table 1, i= 16 ~ 31, i/16 ==> quot=1
\ for Table 7, i=112 ~ 127, i/16 ==> quot=7
\ We have configured HOST_INFO register to indicate which RDC table should be
\ used for this port. ( We selected port-th RDC table for port ), when
\ there is a MAC address match, the HW will come here to find out the
\ DMA channel to which the packet will be forward.
: select-channels-for-rdc-tables ( -- )
#rdc-tables #rdc-tbl-entries * 0 do
: set-default-rdc-for-my-port ( -- )
0 of chan# def-pt0-rdc! endof
1 of chan# def-pt1-rdc! endof
2 of chan# def-pt2-rdc! endof
3 of chan# def-pt3-rdc! endof
\ Set VLAN table so that preference is in favor of MAC match.
\ Set MAC compare enable register so that only the comparison with
\ unique MAC and flow control frame (actually, these two types of
\ comparison can not be disabled in XMAC) are enabled but the
\ comparisons with alternative MAC addresses is disabled.
\ So if a incoming frame carries an MAC that matches the unique
\ MAC, we will find the RDC table from the host-info register for
\ the unique MAC ( We use p-th RDC table for port p). If there
\ is an error in the frame or there is no match with the unique MAC,
\ the frame will be directed to the default DMA associated with
\ the port ( which is also set to p-th Rx DMA channel).
\ Then the Neptune handles L2 classification as follows,
\ (1) If a frame carries unique MAC or a flow control frame comes
\ through port p, it will have DMA channel p as the L2
\ classification result. Then we do L234 classification
\ (2) If a frame coming through port p carries alternative MAC
\ address or it is a frame expecting address filtering or
\ hash-hit, classification will fail and terminate and the
\ frame will be sent to the default RDC channel p.
: layer2-classification ( -- )
set-default-rdc-for-my-port
select-channels-for-rdc-tables
\ Bit 26 (TCAM_DIS) of register FFLP_CFG_1 is set, so TCAM is
tcam-dis camlat=4 or err-dis or llc-snap or fflp-cfg-1!
projects / OpenSPARC-T2-SAM / blob