P4 to Git Change 1127440 by weizhang@weizhang-lnx-opencl on 2015/03/04 13:56:00

EPR #413960 - Platform Atomics on CZ.

	   1. Since CMMQS can support 4G atomics range on CZ, the atomics range on KV is reverted to 4G.
	   2. On KV, the platform atomics is implemented by using ATC/IOMMU. But on CZ, it should be implemented without using ATC/IOMMU due to HW changes. So, _svmAtomicsUsingIOMMU is introduced to differentiate the two implementations.
	   3. _priSupport was renamed _svmAtomics due to different implementation on KV vs CZ.

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpusettings.cpp#304 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gslbe/src/include/cal/cal.h#33 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gslbe/src/rt/GSLDevice.cpp#109 edit

rocclr/runtime/device/gpu/gpusettings.cpp

@@ -419,7 +419,7 @@ Settings::create(
 
     svmFineGrainSystem_ = calAttr.isSVMFineGrainSystem;
 
-    svmAtomics_ = (calAttr.priSupport || calAttr.isSVMFineGrainSystem) ? true : false;
+    svmAtomics_ = (calAttr.svmAtomics || calAttr.isSVMFineGrainSystem) ? true : false;
 
     // Enable some platform extensions
     enableExtension(ClAmdDeviceAttributeQuery);

rocclr/runtime/device/gpu/gslbe/src/include/cal/cal.h

@@ -234,7 +234,7 @@ typedef struct CALdeviceattribsRec {
     CALuint    counterFreq;                         /**< Ref clock counter frequency */
     double     nanoSecondsPerTick;                  /**< Nano seconds per GPU tick */
     bool       longIdleDetect;                      /**< Whether LongIdleDetect enabled */
-    bool       priSupport;                          /**< IOMMUv2 ATS/PRI support */
+    bool       svmAtomics;                          /**< check if svm atomics support */    
     CALuint64  vaStart;                             /**< VA start address */
     CALuint64  vaEnd;                               /**< VA end address */
     bool       isWorkstation;                       /**< Whether Device is a Workstation/Server part */

rocclr/runtime/device/gpu/gslbe/src/rt/GSLDevice.cpp

@@ -150,7 +150,7 @@ CALGSLDevice::getAttribs_int(gsl::gsCtx* cs)
     m_attribs.counterFreq = cs->getCounterFreq();
     m_attribs.nanoSecondsPerTick = 1000000000.0 / cs->getCounterFreq();
     m_attribs.longIdleDetect = cs->getLongIdleDetect();
-    m_attribs.priSupport = m_adp->pAsicInfo->priSupport;
+    m_attribs.svmAtomics = m_adp->pAsicInfo->svmAtomics;
 
     m_attribs.vaStart = static_cast<CALuint64>(m_adp->pAsicInfo->vaStart);
     m_attribs.vaEnd   = static_cast<CALuint64>(m_adp->pAsicInfo->vaEnd);