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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: ilupeuIngressDmaRdStr.vr | |
4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
6 | // | |
7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
8 | // | |
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; version 2 of the License. | |
12 | // | |
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | // | |
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | // | |
22 | // For the avoidance of doubt, and except that if any non-GPL license | |
23 | // choice is available it will apply instead, Sun elects to use only | |
24 | // the General Public License version 2 (GPLv2) at this time for any | |
25 | // software where a choice of GPL license versions is made | |
26 | // available with the language indicating that GPLv2 or any later version | |
27 | // may be used, or where a choice of which version of the GPL is applied is | |
28 | // otherwise unspecified. | |
29 | // | |
30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
31 | // CA 95054 USA or visit www.sun.com if you need additional information or | |
32 | // have any questions. | |
33 | // | |
34 | // ========== Copyright Header End ============================================ | |
35 | class DmaRdPEUStr extends PEUStrBase | |
36 | { | |
37 | integer f_len; // The packet's payload length | |
38 | bit[3:0] f_firstDWBE; // It's "first DWBE" field | |
39 | bit[3:0] f_lastDWBE; // It's "last DWBE" field | |
40 | integer f_bndy; // The address' boundary | |
41 | bit f_lenSpecified; // Was a length specified? | |
42 | bit f_firstSpecified; // Was a "firstDWBE" specified? | |
43 | bit f_lastSpecified; // Was a "lastDWBE" specified? | |
44 | bit f_bndySpecified; // Was an addr bndy specified? | |
45 | bit f_poison; // Is the completion poisoned? | |
46 | bit f_UR; // Is the completion UR? | |
47 | bit f_CA; // Is the completion CA? | |
48 | ||
49 | task new( PEUTestEnv a_env ) | |
50 | { | |
51 | super.new( a_env ); | |
52 | f_lenSpecified = 0; | |
53 | f_firstSpecified = 0; | |
54 | f_lastSpecified = 0; | |
55 | f_bndySpecified = 0; | |
56 | f_poison = 0; | |
57 | f_UR = 0; | |
58 | f_CA = 0; | |
59 | } | |
60 | task SetLen( integer a_len ) | |
61 | { | |
62 | f_len = a_len; | |
63 | f_lenSpecified = 1; | |
64 | } | |
65 | task SetFirstDWBE( bit[3:0] a_dwbe ) | |
66 | { | |
67 | f_firstDWBE = a_dwbe; | |
68 | f_firstSpecified = 1; | |
69 | } | |
70 | task SetLastDWBE( bit[3:0] a_dwbe ) | |
71 | { | |
72 | f_lastDWBE = a_dwbe; | |
73 | f_lastSpecified = 1; | |
74 | } | |
75 | task SetAddrBndy( integer a_bndy ) | |
76 | { | |
77 | f_bndy = a_bndy; | |
78 | f_bndySpecified = 1; | |
79 | } | |
80 | task SetPoisonedPayload() | |
81 | { | |
82 | f_poison = 1; | |
83 | } | |
84 | task SetUC( bit isUR ) | |
85 | { | |
86 | if ( isUR ) | |
87 | f_UR = 1; | |
88 | else | |
89 | f_CA = 1; | |
90 | } | |
91 | task Execute() | |
92 | { | |
93 | bit[PEC_PCI__HDR] ingressHdr; // The ingress TLP's header | |
94 | integer ingressData; // A payload descriptor | |
95 | bit[7:0] ingressTag; // The tag for the TLP | |
96 | bit[PEC_PCI__HDR] egressHdr; // The egress TLP's header | |
97 | integer egressData; // The completion payload | |
98 | bit[7:0] egressAddr; // The payload's DOU address | |
99 | integer dwTotal; // #DWs required for completion | |
100 | integer dwDone; // #DWs completed so far | |
101 | ||
102 | // First, get in line for a DMA tag... | |
103 | f_env.allocDmaTag( ingressTag ); | |
104 | ||
105 | // Then build a TLP | |
106 | if ( f_lenSpecified ) | |
107 | f_env.genIngressRdReq( ingressTag, ingressHdr, ingressData, f_len ); | |
108 | else | |
109 | f_env.genIngressRdReq( ingressTag, ingressHdr, ingressData ); | |
110 | ||
111 | // ...and set fields as requested | |
112 | // by the caller. | |
113 | if ( f_bndySpecified ) | |
114 | f_env.setAddrBndy( ingressHdr, f_bndy, 64 ); | |
115 | //N2 Set the DWBE after setAddrBndy since it adjusts the DWBE now | |
116 | if ( f_firstSpecified ) | |
117 | ingressHdr[PEC_PCI__FIRST_DWBE] = f_firstDWBE; | |
118 | if ( f_lastSpecified ) | |
119 | ingressHdr[PEC_PCI__LAST_DWBE] = f_lastDWBE; | |
120 | ||
121 | // Send the read-request through the | |
122 | // ingress pipeline. | |
123 | f_env.reserveIngressCredits( ingressHdr ); | |
124 | f_env.drivePCIE( ingressHdr, ingressData ); | |
125 | f_env.consumeIngressCredits( ingressHdr ); | |
126 | f_env.expectILU( ingressHdr, ingressData ); | |
127 | ||
128 | // Now send a completion to our | |
129 | // original request through the | |
130 | // egress pipeline. | |
131 | // An unsuccesful completion is simple. | |
132 | if ( !sync( CHECK, f_env.ev_drainStateEnd ) ){ //If drainStateEnd then finish strategy | |
133 | if ( f_UR || f_CA ) | |
134 | { | |
135 | f_env.genEgressCpl( ingressHdr, egressHdr, egressData ); | |
136 | egressHdr[PEC_PCI__FMT_DATA] = 0; | |
137 | if ( f_UR ) | |
138 | egressHdr[PEC_PCI__CPL_STATUS] = PEC_PCI__CPL_STATUS_UR; | |
139 | else | |
140 | egressHdr[PEC_PCI__CPL_STATUS] = PEC_PCI__CPL_STATUS_CA; | |
141 | f_env.driveILU( egressHdr, 0, egressData ); | |
142 | f_env.expectPCIE( egressHdr, egressData ); | |
143 | } | |
144 | ||
145 | // Just one completion for a simple | |
146 | // memory-read request... | |
147 | else if ( ingressHdr[PEC_PCI__LEN] > 0 | |
148 | && 4*ingressHdr[PEC_PCI__LEN] <= f_env.getMaxPayloadSize() ) | |
149 | { | |
150 | f_env.genEgressCpl( ingressHdr, egressHdr, egressData ); | |
151 | if ( f_poison ) f_env.poisonPayload( egressData ); | |
152 | f_env.allocCplData( ingressHdr[PEC_PCI__LEN], | |
153 | egressHdr[PEC_PCI__LOWADDR], | |
154 | egressAddr ); | |
155 | f_env.driveILU( egressHdr, egressAddr, egressData ); | |
156 | if ( f_poison ) egressHdr[PEC_PCI__EP] = 1; | |
157 | if ( !sync( CHECK, f_env.ev_drainStateEnd ) ){ | |
158 | f_env.expectPCIE( egressHdr, egressData ); | |
159 | } | |
160 | } | |
161 | // ...or as many as it takes for a | |
162 | // complex ('bulk') request. | |
163 | else | |
164 | { | |
165 | dwTotal = ingressHdr[PEC_PCI__LEN]; | |
166 | if ( dwTotal == 0 ) dwTotal = 1024; | |
167 | dwDone = 0; | |
168 | while( dwTotal > dwDone ) | |
169 | { | |
170 | f_env.genEgressPartialCpl( ingressHdr, egressHdr, egressData, dwDone ); | |
171 | dwDone = dwDone + egressHdr[PEC_PCI__LEN]; | |
172 | if ( f_poison ) f_env.poisonPayload( egressData ); | |
173 | f_env.allocCplData( egressHdr[PEC_PCI__LEN], | |
174 | egressHdr[PEC_PCI__LOWADDR], | |
175 | egressAddr ); | |
176 | ||
177 | repeat( urandom_range( f_env.Scenario.ilupeuDmaMRdCplDelayMax, f_env.Scenario.ilupeuDmaMRdCplDelayMin)) @(posedge CLOCK); | |
178 | f_env.driveILU( egressHdr, egressAddr, egressData ); | |
179 | if ( f_poison ) egressHdr[PEC_PCI__EP] = 1; | |
180 | if ( !sync( CHECK, f_env.ev_drainStateEnd ) ){ | |
181 | f_env.expectPCIE( egressHdr, egressData ); | |
182 | }else{ | |
183 | dwTotal = dwDone; | |
184 | } | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | /* The environment frees the completion's DOU space */ | |
190 | /* So we only have to free the tag. */ | |
191 | f_env.freeDmaTag( ingressTag ); | |
192 | } /* end Execute */ | |
193 | } /* end DmaRdPECStr */ |