1: #include <petsc/private/deviceimpl.h>
  2: #include <petscdevice_cupm.h>

  4: // REVIEW ME: this should probably return PETSC_MEMTYPE_CUDA and PETSC_MEMTYPE_HIP

  6: /*@C
  7:   PetscGetMemType - Query the `PetscMemType` of a pointer

  9:   Not Collective

 11:   Input Parameter:
 12: . ptr - The pointer to query (may be `NULL`)

 14:   Output Parameter:
 15: . type - The `PetscMemType` of the pointer

 17:   Notes:
 18:   Currently only CUDA and HIP memtypes are supported.

 20:   Level: intermediate

 22: .seealso: `PetscMemType`, `PetscDeviceMalloc()`, `PetscDeviceCalloc()`, `PetscDeviceFree()`,
 23: `PetscDeviceArrayCopy()`, `PetscDeviceArrayZero()`
 24: @*/
 25: PetscErrorCode PetscGetMemType(const void *ptr, PetscMemType *type)
 26: {
 27:   PetscFunctionBegin;
 28:   PetscAssertPointer(type, 2);
 29:   *type = PETSC_MEMTYPE_HOST;
 30:   if (!ptr) PetscFunctionReturn(PETSC_SUCCESS);
 31: #if PetscDefined(HAVE_CUDA)
 32:   if (PetscDeviceInitialized(PETSC_DEVICE_CUDA)) {
 33:     cudaError_t                  cerr;
 34:     struct cudaPointerAttributes attr;
 35:     enum cudaMemoryType          mtype;
 36:     cerr = cudaPointerGetAttributes(&attr, ptr); /* Do not check error since before CUDA 11.0, passing a host pointer returns cudaErrorInvalidValue */
 37:     if (cerr) cerr = cudaGetLastError();         /* If there was an error, return it and then reset it */
 38:   #if (CUDART_VERSION < 10000)
 39:     mtype = attr.memoryType;
 40:   #else
 41:     mtype = attr.type;
 42:   #endif
 43:     if (cerr == cudaSuccess && mtype == cudaMemoryTypeDevice) *type = PETSC_MEMTYPE_DEVICE;
 44:     PetscFunctionReturn(PETSC_SUCCESS);
 45:   }
 46: #endif

 48: #if PetscDefined(HAVE_HIP)
 49:   if (PetscDeviceInitialized(PETSC_DEVICE_HIP)) {
 50:     hipError_t                   cerr;
 51:     struct hipPointerAttribute_t attr;
 52:     enum hipMemoryType           mtype;
 53:     cerr = hipPointerGetAttributes(&attr, ptr);
 54:     if (cerr) cerr = hipGetLastError();
 55:     mtype = attr.memoryType;
 56:     if (cerr == hipSuccess && mtype == hipMemoryTypeDevice) *type = PETSC_MEMTYPE_DEVICE;
 57:   }
 58: #endif
 59:   PetscFunctionReturn(PETSC_SUCCESS);
 60: }