smmu_v3_slaveifc.cc revision 14192:595a4358b844 
1/*
2 * Copyright (c) 2019 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Stan Czerniawski
38 *          Giacomo Travaglini
39 */
40
41#include "dev/arm/smmu_v3_slaveifc.hh"
42
43#include "debug/SMMUv3.hh"
44#include "dev/arm/smmu_v3.hh"
45#include "dev/arm/smmu_v3_transl.hh"
46
47SMMUv3SlaveInterface::SMMUv3SlaveInterface(
48    const SMMUv3SlaveInterfaceParams *p) :
49    MemObject(p),
50    smmu(nullptr),
51    microTLB(new SMMUTLB(p->utlb_entries,
52                         p->utlb_assoc,
53                         p->utlb_policy)),
54    mainTLB(new SMMUTLB(p->tlb_entries,
55                        p->tlb_assoc,
56                        p->tlb_policy)),
57    microTLBEnable(p->utlb_enable),
58    mainTLBEnable(p->tlb_enable),
59    slavePortSem(1),
60    microTLBSem(p->utlb_slots),
61    mainTLBSem(p->tlb_slots),
62    microTLBLat(p->utlb_lat),
63    mainTLBLat(p->tlb_lat),
64    slavePort(new SMMUSlavePort(csprintf("%s.slave", name()), *this)),
65    atsSlavePort(name() + ".atsSlave", *this),
66    atsMasterPort(name() + ".atsMaster", *this),
67    portWidth(p->port_width),
68    wrBufSlotsRemaining(p->wrbuf_slots),
69    xlateSlotsRemaining(p->xlate_slots),
70    prefetchEnable(p->prefetch_enable),
71    prefetchReserveLastWay(
72        p->prefetch_reserve_last_way),
73    deviceNeedsRetry(false),
74    atsDeviceNeedsRetry(false),
75    sendDeviceRetryEvent(*this),
76    atsSendDeviceRetryEvent(this)
77{}
78
79void
80SMMUv3SlaveInterface::sendRange()
81{
82    if (slavePort->isConnected()) {
83        inform("Slave port is connected to %s\n", slavePort->getPeer());
84
85        slavePort->sendRangeChange();
86    } else {
87        fatal("Slave port is not connected.\n");
88    }
89}
90
91Port&
92SMMUv3SlaveInterface::getPort(const std::string &name, PortID id)
93{
94    if (name == "ats_master") {
95        return atsMasterPort;
96    } else if (name == "slave") {
97        return *slavePort;
98    } else if (name == "ats_slave") {
99        return atsSlavePort;
100    } else {
101        return MemObject::getPort(name, id);
102    }
103}
104
105void
106SMMUv3SlaveInterface::schedTimingResp(PacketPtr pkt)
107{
108    slavePort->schedTimingResp(pkt, nextCycle());
109}
110
111void
112SMMUv3SlaveInterface::schedAtsTimingResp(PacketPtr pkt)
113{
114    atsSlavePort.schedTimingResp(pkt, nextCycle());
115
116    if (atsDeviceNeedsRetry) {
117        atsDeviceNeedsRetry = false;
118        schedule(atsSendDeviceRetryEvent, nextCycle());
119    }
120}
121
122Tick
123SMMUv3SlaveInterface::recvAtomic(PacketPtr pkt)
124{
125    DPRINTF(SMMUv3, "[a] req from %s addr=%#x size=%#x\n",
126            slavePort->getPeer(), pkt->getAddr(), pkt->getSize());
127
128    std::string proc_name = csprintf("%s.port", name());
129    SMMUTranslationProcess proc(proc_name, *smmu, *this);
130    proc.beginTransaction(SMMUTranslRequest::fromPacket(pkt));
131
132    SMMUAction a = smmu->runProcessAtomic(&proc, pkt);
133    assert(a.type == ACTION_SEND_RESP);
134
135    return a.delay;
136}
137
138bool
139SMMUv3SlaveInterface::recvTimingReq(PacketPtr pkt)
140{
141    DPRINTF(SMMUv3, "[t] req from %s addr=%#x size=%#x\n",
142            slavePort->getPeer(), pkt->getAddr(), pkt->getSize());
143
144    // @todo: We need to pay for this and not just zero it out
145    pkt->headerDelay = pkt->payloadDelay = 0;
146
147    unsigned nbeats =
148        (pkt->getSize() + (portWidth-1)) / portWidth;
149
150    if (xlateSlotsRemaining==0 ||
151        (pkt->isWrite() && wrBufSlotsRemaining < nbeats))
152    {
153        deviceNeedsRetry = true;
154        return false;
155    }
156
157    if (pkt->isWrite())
158        wrBufSlotsRemaining -= nbeats;
159
160    std::string proc_name = csprintf("%s.port", name());
161    SMMUTranslationProcess *proc =
162        new SMMUTranslationProcess(proc_name, *smmu, *this);
163    proc->beginTransaction(SMMUTranslRequest::fromPacket(pkt));
164
165    smmu->runProcessTiming(proc, pkt);
166
167    return true;
168}
169
170Tick
171SMMUv3SlaveInterface::atsSlaveRecvAtomic(PacketPtr pkt)
172{
173    DPRINTF(SMMUv3, "[a] ATS slave  req  addr=%#x size=%#x\n",
174            pkt->getAddr(), pkt->getSize());
175
176    std::string proc_name = csprintf("%s.atsport", name());
177    const bool ats_request = true;
178    SMMUTranslationProcess proc(
179        proc_name, *smmu, *this);
180    proc.beginTransaction(SMMUTranslRequest::fromPacket(pkt, ats_request));
181
182    SMMUAction a = smmu->runProcessAtomic(&proc, pkt);
183    assert(a.type == ACTION_SEND_RESP_ATS);
184
185    return a.delay;
186}
187
188bool
189SMMUv3SlaveInterface::atsSlaveRecvTimingReq(PacketPtr pkt)
190{
191    DPRINTF(SMMUv3, "[t] ATS slave  req  addr=%#x size=%#x\n",
192            pkt->getAddr(), pkt->getSize());
193
194    // @todo: We need to pay for this and not just zero it out
195    pkt->headerDelay = pkt->payloadDelay = 0;
196
197    if (xlateSlotsRemaining == 0) {
198        deviceNeedsRetry = true;
199        return false;
200    }
201
202    std::string proc_name = csprintf("%s.atsport", name());
203    const bool ats_request = true;
204    SMMUTranslationProcess *proc =
205        new SMMUTranslationProcess(proc_name, *smmu, *this);
206    proc->beginTransaction(SMMUTranslRequest::fromPacket(pkt, ats_request));
207
208    smmu->runProcessTiming(proc, pkt);
209
210    return true;
211}
212
213bool
214SMMUv3SlaveInterface::atsMasterRecvTimingResp(PacketPtr pkt)
215{
216    DPRINTF(SMMUv3, "[t] ATS master resp addr=%#x size=%#x\n",
217            pkt->getAddr(), pkt->getSize());
218
219    // @todo: We need to pay for this and not just zero it out
220    pkt->headerDelay = pkt->payloadDelay = 0;
221
222    SMMUProcess *proc =
223        safe_cast<SMMUProcess *>(pkt->popSenderState());
224
225    smmu->runProcessTiming(proc, pkt);
226
227    return true;
228}
229
230void
231SMMUv3SlaveInterface::sendDeviceRetry()
232{
233    slavePort->sendRetryReq();
234}
235
236void
237SMMUv3SlaveInterface::atsSendDeviceRetry()
238{
239    DPRINTF(SMMUv3, "ATS retry\n");
240    atsSlavePort.sendRetryReq();
241}
242
243void
244SMMUv3SlaveInterface::scheduleDeviceRetry()
245{
246    if (deviceNeedsRetry && !sendDeviceRetryEvent.scheduled()) {
247        DPRINTF(SMMUv3, "sched slave retry\n");
248        deviceNeedsRetry = false;
249        schedule(sendDeviceRetryEvent, nextCycle());
250    }
251}
252
253DrainState
254SMMUv3SlaveInterface::drain()
255{
256    // Wait until all SMMU translations are completed
257    if (xlateSlotsRemaining < params()->xlate_slots) {
258        return DrainState::Draining;
259    }
260    return DrainState::Drained;
261}
262
263SMMUv3SlaveInterface*
264SMMUv3SlaveInterfaceParams::create()
265{
266    return new SMMUv3SlaveInterface(this);
267}
268