/**
* Checks whether the host supports physical page lists or not.
*
* @returns true if it does, false if it doesn't.
*/
DECLR0VBGL(bool) VbglR0CanUsePhysPageList(void)
{
/* a_fLocked is false, because the actual capability of the host is requested.
* See VBGLR0_CAN_USE_PHYS_PAGE_LIST definition.
*/
int rc = vbglR0Enter();
return RT_SUCCESS(rc)
&& VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ false);
}
DECLVBGL(int) VbglR0QueryVMMDevMemory(VMMDevMemory **ppVMMDevMemory)
{
int rc = vbglR0Enter();
if (RT_FAILURE(rc))
return rc;
/* If the memory was not found, return an error. */
if (!g_vbgldata.pVMMDevMemory)
return VERR_NOT_SUPPORTED;
*ppVMMDevMemory = g_vbgldata.pVMMDevMemory;
return rc;
}
DECLR0VBGL(int) VbglR0GRPerform(VMMDevRequestHeader *pReq)
{
int rc = vbglR0Enter();
if (RT_SUCCESS(rc))
{
if (pReq)
{
RTCCPHYS PhysAddr = VbglR0PhysHeapGetPhysAddr(pReq);
if ( PhysAddr != 0
&& PhysAddr < _4G) /* Port IO is 32 bit. */
{
ASMOutU32(g_vbgldata.portVMMDev + VMMDEV_PORT_OFF_REQUEST, (uint32_t)PhysAddr);
/* Make the compiler aware that the host has changed memory. */
ASMCompilerBarrier();
rc = pReq->rc;
}
else
rc = VERR_VBGL_INVALID_ADDR;
}
else
rc = VERR_INVALID_PARAMETER;
}
return rc;
}
DECLR0VBGL(int) VbglR0GRAlloc(VMMDevRequestHeader **ppReq, size_t cbReq, VMMDevRequestType enmReqType)
{
int rc = vbglR0Enter();
if (RT_SUCCESS(rc))
{
if ( ppReq
&& cbReq >= sizeof(VMMDevRequestHeader)
&& cbReq == (uint32_t)cbReq)
{
VMMDevRequestHeader *pReq = (VMMDevRequestHeader *)VbglR0PhysHeapAlloc((uint32_t)cbReq);
AssertMsgReturn(pReq, ("VbglR0GRAlloc: no memory (cbReq=%u)\n", cbReq), VERR_NO_MEMORY);
memset(pReq, 0xAA, cbReq);
pReq->size = (uint32_t)cbReq;
pReq->version = VMMDEV_REQUEST_HEADER_VERSION;
pReq->requestType = enmReqType;
pReq->rc = VERR_GENERAL_FAILURE;
pReq->reserved1 = 0;
#ifdef VBGL_VBOXGUEST
pReq->fRequestor = VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV
#else
pReq->fRequestor = VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV_OTHER
#endif
| VMMDEV_REQUESTOR_CON_DONT_KNOW | VMMDEV_REQUESTOR_TRUST_NOT_GIVEN;
*ppReq = pReq;
rc = VINF_SUCCESS;
}
else
{
dprintf(("VbglR0GRAlloc: Invalid parameter: ppReq=%p cbReq=%u\n", ppReq, cbReq));
rc = VERR_INVALID_PARAMETER;
}
}
return rc;
}
DECLR0VBGL(void) VbglR0GRFree(VMMDevRequestHeader *pReq)
{
int rc = vbglR0Enter();
if (RT_SUCCESS(rc))
VbglR0PhysHeapFree(pReq);
}
/**
* Checks whether the host supports physical page lists or not.
*
* @returns true if it does, false if it doesn't.
*/
DECLR0VBGL(bool) VbglR0CanUsePhysPageList(void)
{
int rc = vbglR0Enter();
return RT_SUCCESS(rc)
&& VBGLR0_CAN_USE_PHYS_PAGE_LIST();
}
