| 1 | \ ========== Copyright Header Begin ========================================== |
| 2 | \ |
| 3 | \ Hypervisor Software File: classifier.fth |
| 4 | \ |
| 5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 6 | \ |
| 7 | \ - Do no alter or remove copyright notices |
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| 9 | \ - Redistribution and use of this software in source and binary forms, with |
| 10 | \ or without modification, are permitted provided that the following |
| 11 | \ conditions are met: |
| 12 | \ |
| 13 | \ - Redistribution of source code must retain the above copyright notice, |
| 14 | \ this list of conditions and the following disclaimer. |
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| 16 | \ - Redistribution in binary form must reproduce the above copyright notice, |
| 17 | \ this list of conditions and the following disclaimer in the |
| 18 | \ documentation and/or other materials provided with the distribution. |
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| 20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors |
| 21 | \ may be used to endorse or promote products derived from this software |
| 22 | \ without specific prior written permission. |
| 23 | \ |
| 24 | \ This software is provided "AS IS," without a warranty of any kind. |
| 25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, |
| 26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A |
| 27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN |
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| 29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR |
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| 37 | \ You acknowledge that this software is not designed, licensed or |
| 38 | \ intended for use in the design, construction, operation or maintenance of |
| 39 | \ any nuclear facility. |
| 40 | \ |
| 41 | \ ========== Copyright Header End ============================================ |
| 42 | id: @(#)classifier.fth 1.1 07/01/23 |
| 43 | purpose: |
| 44 | copyright: Copyright 2007 Sun Microsystems, Inc. All Rights Reserved |
| 45 | copyright: Use is subject to license terms. |
| 46 | |
| 47 | headerless |
| 48 | |
| 49 | d# 8 constant #rdc-tables |
| 50 | d# 16 constant #rdc-tbl-entries |
| 51 | |
| 52 | \ Set all bits, including VPR0,1(,2,3), to 0 so that MAC/VLAN |
| 53 | \ preference is in favor of MAC |
| 54 | \ |
| 55 | : init-vlan-tbl ( -- ) |
| 56 | d# 4096 0 do 0 i enet-vlan-tbl-i! loop |
| 57 | ; |
| 58 | |
| 59 | \ STAT will be set to 1 when read/write operation completes. |
| 60 | \ |
| 61 | : wait-tcam-done ( -- flag ) |
| 62 | tcam-ctl@ stat-done and 0<> |
| 63 | ; |
| 64 | |
| 65 | \ Clear four TCAM_KEY registers. The 0 value in these registers |
| 66 | \ will be written to TCAM. (bits[194:0] of the TCAM do not matter |
| 67 | \ because of our setting of the TCAM_MASK_i registers, but set them |
| 68 | \ to 0 anyway.). |
| 69 | \ |
| 70 | : invalidate-tcam ( -- ) |
| 71 | d# 256 0 do |
| 72 | 0 tcam-key-0! |
| 73 | h# ffff.ffff tcam-key-mask-0! |
| 74 | \ Write the value (0) in TCAM_KEY regs to location i of the |
| 75 | \ TCAM. bit stat-start==0 causes HW to start writing. |
| 76 | rwc-write stat-start or i or tcam-ctl! \ TCAM_CTL.LOC = i |
| 77 | d# 100 ['] wait-tcam-done wait-status |
| 78 | 0= if |
| 79 | cmn-error[ " Tcam access failed" ]cmn-end drop unloop |
| 80 | then |
| 81 | loop |
| 82 | ; |
| 83 | |
| 84 | |
| 85 | \ There are 128 Rx DMA table (RDC_TBL) entries, 16 for each of |
| 86 | \ 8 RDC tables. We initialize the tables as follows: |
| 87 | \ ith RDC Table has the ith Rx channel for all 16 entires, |
| 88 | \ including the first entry as the default channel for that |
| 89 | \ table. That is, |
| 90 | \ RDC Table 0 entry 0~15: {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0} |
| 91 | \ RDC Table 1 entry 0~15: {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1} |
| 92 | \ RDC Table 2 entry 0~15: {2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2} |
| 93 | \ RDC Table 3 entry 0~15: {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3} |
| 94 | \ ... ... |
| 95 | \ RDC Table 7 entry 0~15: {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7} |
| 96 | \ |
| 97 | \ i = 0~127, for Table 0, i= 0 ~ 15, i/16 ==> quot=0 |
| 98 | \ for Table 1, i= 16 ~ 31, i/16 ==> quot=1 |
| 99 | \ for Table 7, i=112 ~ 127, i/16 ==> quot=7 |
| 100 | \ |
| 101 | \ We have configured HOST_INFO register to indicate which RDC table should be |
| 102 | \ used for this port. ( We selected port-th RDC table for port ), when |
| 103 | \ there is a MAC address match, the HW will come here to find out the |
| 104 | \ DMA channel to which the packet will be forward. |
| 105 | \ |
| 106 | : select-channels-for-rdc-tables ( -- ) |
| 107 | #rdc-tables #rdc-tbl-entries * 0 do |
| 108 | chan# i rdc-tbl-i! |
| 109 | loop |
| 110 | ; |
| 111 | |
| 112 | : set-default-rdc-for-my-port ( -- ) |
| 113 | port case |
| 114 | 0 of chan# def-pt0-rdc! endof |
| 115 | 1 of chan# def-pt1-rdc! endof |
| 116 | 2 of chan# def-pt2-rdc! endof |
| 117 | 3 of chan# def-pt3-rdc! endof |
| 118 | endcase |
| 119 | ; |
| 120 | |
| 121 | \ Layer 2 Classification |
| 122 | \ Set VLAN table so that preference is in favor of MAC match. |
| 123 | \ Set MAC compare enable register so that only the comparison with |
| 124 | \ unique MAC and flow control frame (actually, these two types of |
| 125 | \ comparison can not be disabled in XMAC) are enabled but the |
| 126 | \ comparisons with alternative MAC addresses is disabled. |
| 127 | \ So if a incoming frame carries an MAC that matches the unique |
| 128 | \ MAC, we will find the RDC table from the host-info register for |
| 129 | \ the unique MAC ( We use p-th RDC table for port p). If there |
| 130 | \ is an error in the frame or there is no match with the unique MAC, |
| 131 | \ the frame will be directed to the default DMA associated with |
| 132 | \ the port ( which is also set to p-th Rx DMA channel). |
| 133 | \ Then the Neptune handles L2 classification as follows, |
| 134 | \ (1) If a frame carries unique MAC or a flow control frame comes |
| 135 | \ through port p, it will have DMA channel p as the L2 |
| 136 | \ classification result. Then we do L234 classification |
| 137 | \ using FFLP. |
| 138 | \ (2) If a frame coming through port p carries alternative MAC |
| 139 | \ address or it is a frame expecting address filtering or |
| 140 | \ hash-hit, classification will fail and terminate and the |
| 141 | \ frame will be sent to the default RDC channel p. |
| 142 | \ |
| 143 | : layer2-classification ( -- ) |
| 144 | set-default-rdc-for-my-port |
| 145 | select-channels-for-rdc-tables |
| 146 | init-vlan-tbl |
| 147 | init-hostinfo |
| 148 | ; |
| 149 | |
| 150 | : classification ( -- ) |
| 151 | layer2-classification |
| 152 | invalidate-tcam |
| 153 | ; |
| 154 | |
| 155 | \ Bit 26 (TCAM_DIS) of register FFLP_CFG_1 is set, so TCAM is |
| 156 | \ not disabled. |
| 157 | \ |
| 158 | : init-fflp ( -- ) |
| 159 | tcam-dis camlat=4 or err-dis or llc-snap or fflp-cfg-1! |
| 160 | ; |
| 161 | |
| 162 | headerless |