Create KFDTest for SDMA Fault

The purpose of this KFDTest is to investigate the behaviour of an
SDMA queue when an invalid memory address is used.

v2: Don't wait for SDMA queue to finish - it won't finish because of
the gpuvm fault.

v3: Create kfd event before SDMA queue submission. This fix the issue
that gpuvm fault happens earlier than kfd event is created then KFD
exception handler can't find the kfd event (to wake up kfd test)

v4: Instead of using 0x12345678 as the invalid VA, map one page of
FB to gpu and unmap it. Use the mapped GPUVA as the
invalid address

Change-Id: I58af1511f75d869adddede302b238c2725f3fe5a
Signed-off-by: Ori Messinger <Ori.Messinger@amd.com>
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>

tests/kfdtest/src/KFDExceptionTest.cpp

@@ -113,6 +113,59 @@ queuefail:
     queue.Destroy();
 }
 
+void KFDExceptionTest::TestSdmaException(int defaultGPUNode, void *pDst) {
+    SDMAQueue queue;
+    HsaEvent *vmFaultEvent;
+    HSAuint64 faultAddress, page_mask = ~((HSAuint64)PAGE_SIZE - 1);
+
+
+    HsaEventDescriptor eventDesc;
+    eventDesc.EventType = HSA_EVENTTYPE_MEMORY;
+    eventDesc.NodeId = defaultGPUNode;
+    eventDesc.SyncVar.SyncVar.UserData = NULL;
+    eventDesc.SyncVar.SyncVarSize = 0;
+
+    m_ChildStatus = queue.Create(defaultGPUNode);
+    if (m_ChildStatus != HSAKMT_STATUS_SUCCESS) {
+        WARN() << "Queue create failed" << std::endl;
+        return;
+    }
+
+    m_ChildStatus = hsaKmtCreateEvent(&eventDesc, true, false, &vmFaultEvent);
+    if (m_ChildStatus != HSAKMT_STATUS_SUCCESS) {
+        WARN() << "Event create failed" << std::endl;
+        goto queuefail;
+    }
+
+    queue.PlaceAndSubmitPacket(SDMAWriteDataPacket(queue.GetFamilyId(),
+                                                   reinterpret_cast<void *>(pDst),
+                                                   0x02020202));
+
+    m_ChildStatus = hsaKmtWaitOnEvent(vmFaultEvent, g_TestTimeOut);
+    if (m_ChildStatus != HSAKMT_STATUS_SUCCESS) {
+        WARN() << "Wait failed. No Exception triggered" << std::endl;
+        goto eventfail;
+    }
+
+    if (vmFaultEvent->EventData.EventType != HSA_EVENTTYPE_MEMORY) {
+        WARN() << "Unexpected Event Received " << vmFaultEvent->EventData.EventType
+               << std::endl;
+        m_ChildStatus = HSAKMT_STATUS_ERROR;
+        goto eventfail;
+    }
+    faultAddress = vmFaultEvent->EventData.EventData.MemoryAccessFault.VirtualAddress;
+    if (faultAddress != ((HSAuint64)pDst & page_mask) ) {
+        WARN() << "Unexpected Fault Address " << faultAddress
+               << " expected " << ((HSAuint64)pDst & page_mask) << std::endl;
+        m_ChildStatus = HSAKMT_STATUS_ERROR;
+    }
+
+eventfail:
+    hsaKmtDestroyEvent(vmFaultEvent);
+queuefail:
+    queue.Destroy();
+}
+
 /* Test Bad Address access in a child process */
 TEST_F(KFDExceptionTest, AddressFault) {
     TEST_REQUIRE_ENV_CAPABILITIES(ENVCAPS_64BITLINUX);
@@ -244,3 +297,54 @@ TEST_F(KFDExceptionTest, FaultStorm) {
 
     TEST_END
 }
+
+/*
+ */
+TEST_F(KFDExceptionTest, SdmaQueueException) {
+    TEST_REQUIRE_ENV_CAPABILITIES(ENVCAPS_64BITLINUX);
+    TEST_START(TESTPROFILE_RUNALL)
+
+    int defaultGPUNode = m_NodeInfo.HsaDefaultGPUNode();
+    ASSERT_GE(defaultGPUNode, 0) << "failed to get default GPU Node";
+
+    if (m_FamilyId == FAMILY_RV) {
+        LOG() << "Skipping test: IOMMU issues on Raven." << std::endl;
+        return;
+    }
+
+    HSAKMT_STATUS status;
+
+    m_ChildPid = fork();
+    if (m_ChildPid == 0) {
+	unsigned int* pDb = NULL;
+	unsigned int *nullPtr = NULL;
+        m_ChildStatus = hsaKmtOpenKFD();
+        if (m_ChildStatus != HSAKMT_STATUS_SUCCESS) {
+            WARN() << "KFD open failed in child process" << std::endl;
+            return;
+        }
+	m_MemoryFlags.ui32.NonPaged = 1;
+	ASSERT_SUCCESS(hsaKmtAllocMemory(defaultGPUNode, PAGE_SIZE, m_MemoryFlags,
+				reinterpret_cast<void**>(&pDb)));
+	// verify that pDb is not null before it's being used
+	ASSERT_NE(nullPtr, pDb) << "hsaKmtAllocMemory returned a null pointer";
+	ASSERT_SUCCESS(hsaKmtMapMemoryToGPU(pDb, PAGE_SIZE, NULL));
+	EXPECT_SUCCESS(hsaKmtUnmapMemoryToGPU(pDb));
+
+	TestSdmaException(defaultGPUNode, pDb);
+	EXPECT_SUCCESS(hsaKmtFreeMemory(pDb, PAGE_SIZE));
+    } else {
+        int childStatus;
+
+        waitpid(m_ChildPid, &childStatus, 0);
+        if (is_dgpu()) {
+            EXPECT_EQ(WIFEXITED(childStatus), true);
+            EXPECT_EQ(WEXITSTATUS(childStatus), HSAKMT_STATUS_SUCCESS);
+        } else {
+            EXPECT_EQ(WIFSIGNALED(childStatus), true);
+            EXPECT_EQ(WTERMSIG(childStatus), SIGSEGV);
+        }
+    }
+
+    TEST_END
+}