| /*************************************************************************/ /*! |
| @File |
| @Title Debug driver main file |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @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/errno.h> |
| #include <linux/module.h> |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/kdev_t.h> |
| #include <linux/pci.h> |
| #include <linux/list.h> |
| #include <linux/init.h> |
| #include <linux/vmalloc.h> |
| #include <asm/uaccess.h> |
| #include <drm/drmP.h> |
| |
| #include "img_types.h" |
| #include "linuxsrv.h" |
| #include "dbgdriv_ioctl.h" |
| #include "dbgdrvif_srv5.h" |
| #include "dbgdriv.h" |
| #include "hostfunc.h" |
| #include "pvr_debug.h" |
| #include "pvrmodule.h" |
| #include "pvr_uaccess.h" |
| #include "pvr_drm.h" |
| #include "pvr_drv.h" |
| |
| /* Outward temp buffer used by IOCTL handler allocated once and grows as needed. |
| * This optimisation means the debug driver performs less vmallocs/vfrees |
| * reducing the chance of kernel vmalloc space exhaustion. |
| * Singular out buffer for PDump UM reads is not multi-thread safe and so |
| * it now needs a mutex to protect it from multiple simultaneous reads in |
| * the future. |
| */ |
| static IMG_CHAR* g_outTmpBuf = NULL; |
| static IMG_UINT32 g_outTmpBufSize = 64*PAGE_SIZE; |
| static void* g_pvOutTmpBufMutex = NULL; |
| |
| void DBGDrvGetServiceTable(void **fn_table); |
| |
| void DBGDrvGetServiceTable(void **fn_table) |
| { |
| extern DBGKM_SERVICE_TABLE g_sDBGKMServices; |
| |
| *fn_table = &g_sDBGKMServices; |
| } |
| |
| void dbgdrv_cleanup(void) |
| { |
| if (g_outTmpBuf) |
| { |
| vfree(g_outTmpBuf); |
| g_outTmpBuf = NULL; |
| } |
| |
| #if defined(SUPPORT_DBGDRV_EVENT_OBJECTS) |
| HostDestroyEventObjects(); |
| #endif |
| HostDestroyMutex(g_pvOutTmpBufMutex); |
| HostDestroyMutex(g_pvAPIMutex); |
| return; |
| } |
| |
| IMG_INT dbgdrv_init(void) |
| { |
| /* Init API mutex */ |
| if ((g_pvAPIMutex=HostCreateMutex()) == NULL) |
| { |
| return -ENOMEM; |
| } |
| |
| /* Init TmpBuf mutex */ |
| if ((g_pvOutTmpBufMutex=HostCreateMutex()) == NULL) |
| { |
| return -ENOMEM; |
| } |
| |
| #if defined(SUPPORT_DBGDRV_EVENT_OBJECTS) |
| /* |
| * The current implementation of HostCreateEventObjects on Linux |
| * can never fail, so there is no need to check for error. |
| */ |
| (void) HostCreateEventObjects(); |
| #endif |
| |
| return 0; |
| } |
| |
| static IMG_INT dbgdrv_ioctl_work(void *arg, IMG_BOOL bCompat) |
| { |
| struct drm_pvr_dbgdrv_cmd *psDbgdrvCmd = (struct drm_pvr_dbgdrv_cmd *) arg; |
| char *buffer, *in, *out; |
| unsigned int cmd; |
| void *pBufferIn, *pBufferOut; |
| |
| if (psDbgdrvCmd->pad) |
| { |
| PVR_DPF((PVR_DBG_ERROR, "Invalid pad value\n")); |
| return -EINVAL; |
| } |
| |
| if ((psDbgdrvCmd->in_data_size > (PAGE_SIZE >> 1)) || |
| (psDbgdrvCmd->out_data_size > (PAGE_SIZE >> 1))) |
| { |
| PVR_DPF((PVR_DBG_ERROR,"Sizes of the buffers are too large, cannot do ioctl\n")); |
| return -1; |
| } |
| |
| buffer = (char *) HostPageablePageAlloc(1); |
| if (!buffer) |
| { |
| PVR_DPF((PVR_DBG_ERROR,"Failed to allocate buffer, cannot do ioctl\n")); |
| return -EFAULT; |
| } |
| |
| in = buffer; |
| out = buffer + (PAGE_SIZE >>1); |
| |
| pBufferIn = (void *)(uintptr_t) psDbgdrvCmd->in_data_ptr; |
| pBufferOut = (void *)(uintptr_t) psDbgdrvCmd->out_data_ptr; |
| |
| if (pvr_copy_from_user(in, pBufferIn, psDbgdrvCmd->in_data_size) != 0) |
| { |
| goto init_failed; |
| } |
| |
| /* Extra -1 because ioctls start at DEBUG_SERVICE_IOCTL_BASE + 1 */ |
| cmd = MAKEIOCTLINDEX(psDbgdrvCmd->cmd) - DEBUG_SERVICE_IOCTL_BASE - 1; |
| |
| if (psDbgdrvCmd->cmd == DEBUG_SERVICE_READ) |
| { |
| IMG_UINT32 *pui32BytesCopied = (IMG_UINT32 *)out; |
| DBG_OUT_READ *psReadOutParams = (DBG_OUT_READ *)out; |
| DBG_IN_READ *psReadInParams = (DBG_IN_READ *)in; |
| void *pvOutBuffer; |
| PDBG_STREAM psStream; |
| |
| psStream = SID2PStream(psReadInParams->hStream); |
| if (!psStream) |
| { |
| goto init_failed; |
| } |
| |
| /* Serialise IOCTL Read op access to the singular output buffer */ |
| HostAquireMutex(g_pvOutTmpBufMutex); |
| |
| if ((g_outTmpBuf == NULL) || (psReadInParams->ui32OutBufferSize > g_outTmpBufSize)) |
| { |
| if (psReadInParams->ui32OutBufferSize > g_outTmpBufSize) |
| { |
| g_outTmpBufSize = psReadInParams->ui32OutBufferSize; |
| } |
| g_outTmpBuf = vmalloc(g_outTmpBufSize); |
| if (!g_outTmpBuf) |
| { |
| HostReleaseMutex(g_pvOutTmpBufMutex); |
| goto init_failed; |
| } |
| } |
| |
| /* Ensure only one thread is allowed into the DBGDriv core at a time */ |
| HostAquireMutex(g_pvAPIMutex); |
| |
| psReadOutParams->ui32DataRead = DBGDrivRead(psStream, |
| psReadInParams->ui32BufID, |
| psReadInParams->ui32OutBufferSize, |
| g_outTmpBuf); |
| psReadOutParams->ui32SplitMarker = DBGDrivGetMarker(psStream); |
| |
| HostReleaseMutex(g_pvAPIMutex); |
| |
| pvOutBuffer = WIDEPTR_GET_PTR(psReadInParams->pui8OutBuffer, bCompat); |
| |
| if (pvr_copy_to_user(pvOutBuffer, |
| g_outTmpBuf, |
| *pui32BytesCopied) != 0) |
| { |
| HostReleaseMutex(g_pvOutTmpBufMutex); |
| goto init_failed; |
| } |
| |
| HostReleaseMutex(g_pvOutTmpBufMutex); |
| |
| } |
| else |
| { |
| (g_DBGDrivProc[cmd])(in, out, bCompat); |
| } |
| |
| if (copy_to_user(pBufferOut, out, psDbgdrvCmd->out_data_size) != 0) |
| { |
| goto init_failed; |
| } |
| |
| HostPageablePageFree((void *)buffer); |
| return 0; |
| |
| init_failed: |
| HostPageablePageFree((void *)buffer); |
| return -EFAULT; |
| } |
| |
| int dbgdrv_ioctl(struct drm_device *dev, void *arg, struct drm_file *pFile) |
| { |
| return dbgdrv_ioctl_work((void *) arg, IMG_FALSE); |
| } |
| |
| int dbgdrv_ioctl_compat(struct file *file, unsigned int ioctlCmd, unsigned long arg) |
| { |
| return dbgdrv_ioctl_work((void *) arg, IMG_TRUE); |
| } |
| |
| |
| |
| EXPORT_SYMBOL(DBGDrvGetServiceTable); |