| /******************************************************************************* |
| @File |
| @Title Server bridge for cmm |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @Description Implements the server side of the bridge for cmm |
| @License Dual MIT/GPLv2 |
| |
| The contents of this file are subject to the MIT license as set out below. |
| |
| 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. |
| |
| Alternatively, the contents of this file may be used under the terms of |
| the GNU General Public License Version 2 ("GPL") in which case the provisions |
| of GPL are applicable instead of those above. |
| |
| If you wish to allow use of your version of this file only under the terms of |
| GPL, and not to allow others to use your version of this file under the terms |
| of the MIT license, indicate your decision by deleting the provisions above |
| and replace them with the notice and other provisions required by GPL as set |
| out in the file called "GPL-COPYING" included in this distribution. If you do |
| not delete the provisions above, a recipient may use your version of this file |
| under the terms of either the MIT license or GPL. |
| |
| This License is also included in this distribution in the file called |
| "MIT-COPYING". |
| |
| EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) 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; AND (B) 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 <linux/uaccess.h> |
| |
| #include "img_defs.h" |
| |
| #include "pmr.h" |
| #include "devicemem_server.h" |
| |
| #include "common_cmm_bridge.h" |
| |
| #include "allocmem.h" |
| #include "pvr_debug.h" |
| #include "connection_server.h" |
| #include "pvr_bridge.h" |
| #if defined(SUPPORT_RGX) |
| #include "rgx_bridge.h" |
| #endif |
| #include "srvcore.h" |
| #include "handle.h" |
| |
| #include <linux/slab.h> |
| |
| #if !defined(EXCLUDE_CMM_BRIDGE) |
| |
| /* *************************************************************************** |
| * Server-side bridge entry points |
| */ |
| |
| static IMG_INT |
| PVRSRVBridgeDevmemIntExportCtx(IMG_UINT32 ui32DispatchTableEntry, |
| PVRSRV_BRIDGE_IN_DEVMEMINTEXPORTCTX * |
| psDevmemIntExportCtxIN, |
| PVRSRV_BRIDGE_OUT_DEVMEMINTEXPORTCTX * |
| psDevmemIntExportCtxOUT, |
| CONNECTION_DATA * psConnection) |
| { |
| IMG_HANDLE hContext = psDevmemIntExportCtxIN->hContext; |
| DEVMEMINT_CTX *psContextInt = NULL; |
| IMG_HANDLE hPMR = psDevmemIntExportCtxIN->hPMR; |
| PMR *psPMRInt = NULL; |
| DEVMEMINT_CTX_EXPORT *psContextExportInt = NULL; |
| |
| /* Lock over handle lookup. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| /* Look up the address from the handle */ |
| psDevmemIntExportCtxOUT->eError = |
| PVRSRVLookupHandleUnlocked(psConnection->psHandleBase, |
| (void **)&psContextInt, |
| hContext, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX, |
| IMG_TRUE); |
| if (unlikely(psDevmemIntExportCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntExportCtx_exit; |
| } |
| |
| /* Look up the address from the handle */ |
| psDevmemIntExportCtxOUT->eError = |
| PVRSRVLookupHandleUnlocked(psConnection->psHandleBase, |
| (void **)&psPMRInt, |
| hPMR, |
| PVRSRV_HANDLE_TYPE_PHYSMEM_PMR, |
| IMG_TRUE); |
| if (unlikely(psDevmemIntExportCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntExportCtx_exit; |
| } |
| /* Release now we have looked up handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| psDevmemIntExportCtxOUT->eError = |
| DevmemIntExportCtx(psContextInt, psPMRInt, &psContextExportInt); |
| /* Exit early if bridged call fails */ |
| if (unlikely(psDevmemIntExportCtxOUT->eError != PVRSRV_OK)) |
| { |
| goto DevmemIntExportCtx_exit; |
| } |
| |
| /* Lock over handle creation. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| psDevmemIntExportCtxOUT->eError = |
| PVRSRVAllocHandleUnlocked(psConnection->psHandleBase, |
| &psDevmemIntExportCtxOUT->hContextExport, |
| (void *)psContextExportInt, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX_EXPORT, |
| PVRSRV_HANDLE_ALLOC_FLAG_NONE, |
| (PFN_HANDLE_RELEASE) & |
| DevmemIntUnexportCtx); |
| if (unlikely(psDevmemIntExportCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntExportCtx_exit; |
| } |
| |
| /* Release now we have created handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| DevmemIntExportCtx_exit: |
| |
| /* Lock over handle lookup cleanup. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| /* Unreference the previously looked up handle */ |
| if (psContextInt) |
| { |
| PVRSRVReleaseHandleUnlocked(psConnection->psHandleBase, |
| hContext, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX); |
| } |
| |
| /* Unreference the previously looked up handle */ |
| if (psPMRInt) |
| { |
| PVRSRVReleaseHandleUnlocked(psConnection->psHandleBase, |
| hPMR, |
| PVRSRV_HANDLE_TYPE_PHYSMEM_PMR); |
| } |
| /* Release now we have cleaned up look up handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| if (psDevmemIntExportCtxOUT->eError != PVRSRV_OK) |
| { |
| if (psContextExportInt) |
| { |
| LockHandle(KERNEL_HANDLE_BASE); |
| DevmemIntUnexportCtx(psContextExportInt); |
| UnlockHandle(KERNEL_HANDLE_BASE); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static IMG_INT |
| PVRSRVBridgeDevmemIntUnexportCtx(IMG_UINT32 ui32DispatchTableEntry, |
| PVRSRV_BRIDGE_IN_DEVMEMINTUNEXPORTCTX * |
| psDevmemIntUnexportCtxIN, |
| PVRSRV_BRIDGE_OUT_DEVMEMINTUNEXPORTCTX * |
| psDevmemIntUnexportCtxOUT, |
| CONNECTION_DATA * psConnection) |
| { |
| |
| /* Lock over handle destruction. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| psDevmemIntUnexportCtxOUT->eError = |
| PVRSRVReleaseHandleUnlocked(psConnection->psHandleBase, |
| (IMG_HANDLE) psDevmemIntUnexportCtxIN-> |
| hContextExport, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX_EXPORT); |
| if (unlikely |
| ((psDevmemIntUnexportCtxOUT->eError != PVRSRV_OK) |
| && (psDevmemIntUnexportCtxOUT->eError != PVRSRV_ERROR_RETRY))) |
| { |
| PVR_DPF((PVR_DBG_ERROR, |
| "PVRSRVBridgeDevmemIntUnexportCtx: %s", |
| PVRSRVGetErrorString(psDevmemIntUnexportCtxOUT-> |
| eError))); |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntUnexportCtx_exit; |
| } |
| |
| /* Release now we have destroyed handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| DevmemIntUnexportCtx_exit: |
| |
| return 0; |
| } |
| |
| static IMG_INT |
| PVRSRVBridgeDevmemIntAcquireRemoteCtx(IMG_UINT32 ui32DispatchTableEntry, |
| PVRSRV_BRIDGE_IN_DEVMEMINTACQUIREREMOTECTX |
| * psDevmemIntAcquireRemoteCtxIN, |
| PVRSRV_BRIDGE_OUT_DEVMEMINTACQUIREREMOTECTX |
| * psDevmemIntAcquireRemoteCtxOUT, |
| CONNECTION_DATA * psConnection) |
| { |
| IMG_HANDLE hPMR = psDevmemIntAcquireRemoteCtxIN->hPMR; |
| PMR *psPMRInt = NULL; |
| DEVMEMINT_CTX *psContextInt = NULL; |
| IMG_HANDLE hPrivDataInt = NULL; |
| |
| psDevmemIntAcquireRemoteCtxOUT->hContext = NULL; |
| |
| /* Lock over handle lookup. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| /* Look up the address from the handle */ |
| psDevmemIntAcquireRemoteCtxOUT->eError = |
| PVRSRVLookupHandleUnlocked(psConnection->psHandleBase, |
| (void **)&psPMRInt, |
| hPMR, |
| PVRSRV_HANDLE_TYPE_PHYSMEM_PMR, |
| IMG_TRUE); |
| if (unlikely(psDevmemIntAcquireRemoteCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntAcquireRemoteCtx_exit; |
| } |
| /* Release now we have looked up handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| psDevmemIntAcquireRemoteCtxOUT->eError = |
| DevmemIntAcquireRemoteCtx(psPMRInt, &psContextInt, &hPrivDataInt); |
| /* Exit early if bridged call fails */ |
| if (unlikely(psDevmemIntAcquireRemoteCtxOUT->eError != PVRSRV_OK)) |
| { |
| goto DevmemIntAcquireRemoteCtx_exit; |
| } |
| |
| /* Lock over handle creation. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| psDevmemIntAcquireRemoteCtxOUT->eError = |
| PVRSRVAllocHandleUnlocked(psConnection->psHandleBase, |
| &psDevmemIntAcquireRemoteCtxOUT->hContext, |
| (void *)psContextInt, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX, |
| PVRSRV_HANDLE_ALLOC_FLAG_NONE, |
| (PFN_HANDLE_RELEASE) & |
| DevmemIntCtxDestroy); |
| if (unlikely(psDevmemIntAcquireRemoteCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntAcquireRemoteCtx_exit; |
| } |
| |
| psDevmemIntAcquireRemoteCtxOUT->eError = |
| PVRSRVAllocSubHandleUnlocked(psConnection->psHandleBase, |
| &psDevmemIntAcquireRemoteCtxOUT-> |
| hPrivData, (void *)hPrivDataInt, |
| PVRSRV_HANDLE_TYPE_DEV_PRIV_DATA, |
| PVRSRV_HANDLE_ALLOC_FLAG_NONE, |
| psDevmemIntAcquireRemoteCtxOUT-> |
| hContext); |
| if (unlikely(psDevmemIntAcquireRemoteCtxOUT->eError != PVRSRV_OK)) |
| { |
| UnlockHandle(psConnection->psHandleBase); |
| goto DevmemIntAcquireRemoteCtx_exit; |
| } |
| |
| /* Release now we have created handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| DevmemIntAcquireRemoteCtx_exit: |
| |
| /* Lock over handle lookup cleanup. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| /* Unreference the previously looked up handle */ |
| if (psPMRInt) |
| { |
| PVRSRVReleaseHandleUnlocked(psConnection->psHandleBase, |
| hPMR, |
| PVRSRV_HANDLE_TYPE_PHYSMEM_PMR); |
| } |
| /* Release now we have cleaned up look up handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| if (psDevmemIntAcquireRemoteCtxOUT->eError != PVRSRV_OK) |
| { |
| if (psDevmemIntAcquireRemoteCtxOUT->hContext) |
| { |
| PVRSRV_ERROR eError; |
| |
| /* Lock over handle creation cleanup. */ |
| LockHandle(psConnection->psHandleBase); |
| |
| eError = |
| PVRSRVReleaseHandleUnlocked(psConnection-> |
| psHandleBase, |
| (IMG_HANDLE) |
| psDevmemIntAcquireRemoteCtxOUT-> |
| hContext, |
| PVRSRV_HANDLE_TYPE_DEVMEMINT_CTX); |
| if (unlikely |
| ((eError != PVRSRV_OK) |
| && (eError != PVRSRV_ERROR_RETRY))) |
| { |
| PVR_DPF((PVR_DBG_ERROR, |
| "PVRSRVBridgeDevmemIntAcquireRemoteCtx: %s", |
| PVRSRVGetErrorString(eError))); |
| } |
| /* Releasing the handle should free/destroy/release the resource. |
| * This should never fail... */ |
| PVR_ASSERT((eError == PVRSRV_OK) |
| || (eError == PVRSRV_ERROR_RETRY)); |
| |
| /* Avoid freeing/destroying/releasing the resource a second time below */ |
| psContextInt = NULL; |
| /* Release now we have cleaned up creation handles. */ |
| UnlockHandle(psConnection->psHandleBase); |
| |
| } |
| |
| if (psContextInt) |
| { |
| DevmemIntCtxDestroy(psContextInt); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* *************************************************************************** |
| * Server bridge dispatch related glue |
| */ |
| |
| static IMG_BOOL bUseLock = IMG_TRUE; |
| #endif /* EXCLUDE_CMM_BRIDGE */ |
| |
| #if !defined(EXCLUDE_CMM_BRIDGE) |
| PVRSRV_ERROR InitCMMBridge(void); |
| PVRSRV_ERROR DeinitCMMBridge(void); |
| |
| /* |
| * Register all CMM functions with services |
| */ |
| PVRSRV_ERROR InitCMMBridge(void) |
| { |
| |
| SetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTEXPORTCTX, |
| PVRSRVBridgeDevmemIntExportCtx, NULL, bUseLock); |
| |
| SetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTUNEXPORTCTX, |
| PVRSRVBridgeDevmemIntUnexportCtx, NULL, bUseLock); |
| |
| SetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTACQUIREREMOTECTX, |
| PVRSRVBridgeDevmemIntAcquireRemoteCtx, NULL, |
| bUseLock); |
| |
| return PVRSRV_OK; |
| } |
| |
| /* |
| * Unregister all cmm functions with services |
| */ |
| PVRSRV_ERROR DeinitCMMBridge(void) |
| { |
| |
| UnsetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTEXPORTCTX); |
| |
| UnsetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTUNEXPORTCTX); |
| |
| UnsetDispatchTableEntry(PVRSRV_BRIDGE_CMM, |
| PVRSRV_BRIDGE_CMM_DEVMEMINTACQUIREREMOTECTX); |
| |
| return PVRSRV_OK; |
| } |
| #else /* EXCLUDE_CMM_BRIDGE */ |
| /* This bridge is conditional on EXCLUDE_CMM_BRIDGE - when defined, |
| * do not populate the dispatch table with its functions |
| */ |
| #define InitCMMBridge() \ |
| PVRSRV_OK |
| |
| #define DeinitCMMBridge() \ |
| PVRSRV_OK |
| |
| #endif /* EXCLUDE_CMM_BRIDGE */ |