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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Additions/common/VBoxVideo/HGSMIBuffers.cpp | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/VBox/Additions/common/VBoxVideo/HGSMIBuffers.cpp | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxVideo/HGSMIBuffers.cpp b/src/VBox/Additions/common/VBoxVideo/HGSMIBuffers.cpp new file mode 100644 index 00000000..84a35a4a --- /dev/null +++ b/src/VBox/Additions/common/VBoxVideo/HGSMIBuffers.cpp @@ -0,0 +1,124 @@ +/* $Id: HGSMIBuffers.cpp $ */ +/** @file + * VirtualBox Video driver, common code - HGSMI buffer management. + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * 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 AUTHORS OR COPYRIGHT + * HOLDERS 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 RT_UNTRUSTED_VOLATILE_HOST *) 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 RT_UNTRUSTED_VOLATILE_HOST *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 RT_UNTRUSTED_VOLATILE_HOST *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; +} |