/* * Copyright (C) 2006-2017 Oracle Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include <VBoxVideoGuest.h> #include <VBoxVideoVBE.h> #include <VBoxVideoIPRT.h> /** * Set up the HGSMI guest-to-host command context. * @returns iprt status value * @param pCtx the context to set up * @param pvGuestHeapMemory a pointer to the mapped backing memory for * the guest heap * @param cbGuestHeapMemory the size of the backing memory area * @param offVRAMGuestHeapMemory the offset of the memory pointed to by * @a pvGuestHeapMemory within the video RAM * @param pEnv HGSMI environment. */ DECLHIDDEN(int) VBoxHGSMISetupGuestContext(PHGSMIGUESTCOMMANDCONTEXT pCtx, void *pvGuestHeapMemory, uint32_t cbGuestHeapMemory, uint32_t offVRAMGuestHeapMemory, const HGSMIENV *pEnv) { /** @todo should we be using a fixed ISA port value here? */ pCtx->port = (RTIOPORT)VGA_PORT_HGSMI_GUEST; #ifdef VBOX_WDDM_MINIPORT return VBoxSHGSMIInit(&pCtx->heapCtx, pvGuestHeapMemory, cbGuestHeapMemory, offVRAMGuestHeapMemory, pEnv); #else return HGSMIHeapSetup(&pCtx->heapCtx, pvGuestHeapMemory, cbGuestHeapMemory, offVRAMGuestHeapMemory, pEnv); #endif } /** * Allocate and initialise a command descriptor in the guest heap for a * guest-to-host command. * * @returns pointer to the descriptor's command data buffer * @param pCtx the context containing the heap to be used * @param cbData the size of the command data to go into the descriptor * @param u8Ch the HGSMI channel to be used, set to the descriptor * @param u16Op the HGSMI command to be sent, set to the descriptor */ DECLHIDDEN(void *) VBoxHGSMIBufferAlloc(PHGSMIGUESTCOMMANDCONTEXT pCtx, HGSMISIZE cbData, uint8_t u8Ch, uint16_t u16Op) { #ifdef VBOX_WDDM_MINIPORT return VBoxSHGSMIHeapAlloc (&pCtx->heapCtx, cbData, u8Ch, u16Op); #else return HGSMIHeapAlloc (&pCtx->heapCtx, cbData, u8Ch, u16Op); #endif } /** * Free a descriptor allocated by @a VBoxHGSMIBufferAlloc. * * @param pCtx the context containing the heap used * @param pvBuffer the pointer returned by @a VBoxHGSMIBufferAlloc */ DECLHIDDEN(void) VBoxHGSMIBufferFree(PHGSMIGUESTCOMMANDCONTEXT pCtx, void *pvBuffer) { #ifdef VBOX_WDDM_MINIPORT VBoxSHGSMIHeapFree (&pCtx->heapCtx, pvBuffer); #else HGSMIHeapFree (&pCtx->heapCtx, pvBuffer); #endif } /** * Submit a command descriptor allocated by @a VBoxHGSMIBufferAlloc. * * @param pCtx the context containing the heap used * @param pvBuffer the pointer returned by @a VBoxHGSMIBufferAlloc */ DECLHIDDEN(int) VBoxHGSMIBufferSubmit(PHGSMIGUESTCOMMANDCONTEXT pCtx, void *pvBuffer) { /* Initialize the buffer and get the offset for port IO. */ HGSMIOFFSET offBuffer = HGSMIHeapBufferOffset (HGSMIGUESTCMDHEAP_GET(&pCtx->heapCtx), pvBuffer); Assert(offBuffer != HGSMIOFFSET_VOID); if (offBuffer != HGSMIOFFSET_VOID) { /* Submit the buffer to the host. */ VBVO_PORT_WRITE_U32(pCtx->port, offBuffer); /* Make the compiler aware that the host has changed memory. */ ASMCompilerBarrier(); return VINF_SUCCESS; } return VERR_INVALID_PARAMETER; }