diff options
Diffstat (limited to 'drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_mmu_vg.c')
| -rw-r--r-- | drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_mmu_vg.c | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_mmu_vg.c b/drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_mmu_vg.c new file mode 100644 index 000000000000..e3206277d891 --- /dev/null +++ b/drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel_mmu_vg.c @@ -0,0 +1,503 @@ +/**************************************************************************** +* +* Copyright (C) 2005 - 2011 by Vivante Corp. +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation; either version 2 of the license, or +* (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not write to the Free Software +* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +* +*****************************************************************************/ + + + + +#include "gc_hal_kernel_precomp.h" + +#if gcdENABLE_VG + +#define _GC_OBJ_ZONE gcvZONE_MMU + +/******************************************************************************* +** +** gckVGMMU_Construct +** +** Construct a new gckVGMMU object. +** +** INPUT: +** +** gckVGKERNEL Kernel +** Pointer to an gckVGKERNEL object. +** +** gctSIZE_T MmuSize +** Number of bytes for the page table. +** +** OUTPUT: +** +** gckVGMMU * Mmu +** Pointer to a variable that receives the gckVGMMU object pointer. +*/ +gceSTATUS gckVGMMU_Construct( + IN gckVGKERNEL Kernel, + IN gctSIZE_T MmuSize, + OUT gckVGMMU * Mmu + ) +{ + gckOS os; + gckVGHARDWARE hardware; + gceSTATUS status; + gckVGMMU mmu; + gctUINT32 * pageTable; + gctUINT32 i; + + gcmkHEADER_ARG("Kernel=0x%x MmuSize=0x%x Mmu=0x%x", Kernel, MmuSize, Mmu); + + /* Verify the arguments. */ + gcmkVERIFY_OBJECT(Kernel, gcvOBJ_KERNEL); + gcmkVERIFY_ARGUMENT(MmuSize > 0); + gcmkVERIFY_ARGUMENT(Mmu != gcvNULL); + + /* Extract the gckOS object pointer. */ + os = Kernel->os; + gcmkVERIFY_OBJECT(os, gcvOBJ_OS); + + /* Extract the gckVGHARDWARE object pointer. */ + hardware = Kernel->hardware; + gcmkVERIFY_OBJECT(hardware, gcvOBJ_HARDWARE); + + /* Allocate memory for the gckVGMMU object. */ + status = gckOS_Allocate(os, sizeof(struct _gckVGMMU), (gctPOINTER *) &mmu); + + if (status < 0) + { + /* Error. */ + gcmkFATAL( + "%s(%d): could not allocate gckVGMMU object.", + __FUNCTION__, __LINE__ + ); + + return status; + } + + /* Initialize the gckVGMMU object. */ + mmu->object.type = gcvOBJ_MMU; + mmu->os = os; + mmu->hardware = hardware; + + /* Create the mutex. */ + status = gckOS_CreateMutex(os, &mmu->mutex); + + if (status < 0) + { + /* Roll back. */ + mmu->object.type = gcvOBJ_UNKNOWN; + gcmkVERIFY_OK(gckOS_Free(os, mmu)); + + /* Error. */ + return status; + } + + /* Allocate the page table. */ + mmu->pageTableSize = MmuSize; + status = gckOS_AllocateContiguous(os, + gcvFALSE, + &mmu->pageTableSize, + &mmu->pageTablePhysical, + &mmu->pageTableLogical); + + if (status < 0) + { + /* Roll back. */ + gcmkVERIFY_OK(gckOS_DeleteMutex(os, mmu->mutex)); + + mmu->object.type = gcvOBJ_UNKNOWN; + gcmkVERIFY_OK(gckOS_Free(os, mmu)); + + /* Error. */ + gcmkFATAL( + "%s(%d): could not allocate page table.", + __FUNCTION__, __LINE__ + ); + + return status; + } + + /* Compute number of entries in page table. */ + mmu->entryCount = mmu->pageTableSize / sizeof(gctUINT32); + mmu->entry = 0; + + /* Mark the entire page table as available. */ + pageTable = (gctUINT32 *) mmu->pageTableLogical; + for (i = 0; i < mmu->entryCount; i++) + { + pageTable[i] = (gctUINT32)~0; + } + + /* Set page table address. */ + status = gckVGHARDWARE_SetMMU(hardware, mmu->pageTableLogical); + + if (status < 0) + { + /* Free the page table. */ + gcmkVERIFY_OK(gckOS_FreeContiguous(mmu->os, + mmu->pageTablePhysical, + mmu->pageTableLogical, + mmu->pageTableSize)); + + /* Roll back. */ + gcmkVERIFY_OK(gckOS_DeleteMutex(os, mmu->mutex)); + + mmu->object.type = gcvOBJ_UNKNOWN; + gcmkVERIFY_OK(gckOS_Free(os, mmu)); + + /* Error. */ + gcmkFATAL( + "%s(%d): could not program page table.", + __FUNCTION__, __LINE__ + ); + + return status; + } + + /* Return the gckVGMMU object pointer. */ + *Mmu = mmu; + + gcmkTRACE_ZONE( + gcvLEVEL_INFO, gcvZONE_MMU, + "%s(%d): %u entries at %p.(0x%08X)\n", + __FUNCTION__, __LINE__, + mmu->entryCount, + mmu->pageTableLogical, + mmu->pageTablePhysical + ); + + gcmkFOOTER_NO(); + /* Success. */ + return gcvSTATUS_OK; +} + +/******************************************************************************* +** +** gckVGMMU_Destroy +** +** Destroy a nAQMMU object. +** +** INPUT: +** +** gckVGMMU Mmu +** Pointer to an gckVGMMU object. +** +** OUTPUT: +** +** Nothing. +*/ +gceSTATUS gckVGMMU_Destroy( + IN gckVGMMU Mmu + ) +{ + gcmkHEADER_ARG("Mmu=0x%x", Mmu); + + /* Verify the arguments. */ + gcmkVERIFY_OBJECT(Mmu, gcvOBJ_MMU); + + /* Free the page table. */ + gcmkVERIFY_OK(gckOS_FreeContiguous(Mmu->os, + Mmu->pageTablePhysical, + Mmu->pageTableLogical, + Mmu->pageTableSize)); + + /* Roll back. */ + gcmkVERIFY_OK(gckOS_DeleteMutex(Mmu->os, Mmu->mutex)); + + /* Mark the gckVGMMU object as unknown. */ + Mmu->object.type = gcvOBJ_UNKNOWN; + + /* Free the gckVGMMU object. */ + gcmkVERIFY_OK(gckOS_Free(Mmu->os, Mmu)); + + gcmkFOOTER_NO(); + /* Success. */ + return gcvSTATUS_OK; +} + +/******************************************************************************* +** +** gckVGMMU_AllocatePages +** +** Allocate pages inside the page table. +** +** INPUT: +** +** gckVGMMU Mmu +** Pointer to an gckVGMMU object. +** +** gctSIZE_T PageCount +** Number of pages to allocate. +** +** OUTPUT: +** +** gctPOINTER * PageTable +** Pointer to a variable that receives the base address of the page +** table. +** +** gctUINT32 * Address +** Pointer to a variable that receives the hardware specific address. +*/ +gceSTATUS gckVGMMU_AllocatePages( + IN gckVGMMU Mmu, + IN gctSIZE_T PageCount, + OUT gctPOINTER * PageTable, + OUT gctUINT32 * Address + ) +{ + gceSTATUS status; + gctUINT32 tail, index, i; + gctUINT32 * table; + gctBOOL allocated = gcvFALSE; + + gcmkHEADER_ARG("Mmu=0x%x PageCount=0x%x PageTable=0x%x Address=0x%x", + Mmu, PageCount, PageTable, Address); + + /* Verify the arguments. */ + gcmkVERIFY_OBJECT(Mmu, gcvOBJ_MMU); + gcmkVERIFY_ARGUMENT(PageCount > 0); + gcmkVERIFY_ARGUMENT(PageTable != gcvNULL); + gcmkVERIFY_ARGUMENT(Address != gcvNULL); + + gcmkTRACE_ZONE( + gcvLEVEL_INFO, gcvZONE_MMU, + "%s(%d): %u pages.\n", + __FUNCTION__, __LINE__, + PageCount + ); + + if (PageCount > Mmu->entryCount) + { + gcmkTRACE_ZONE( + gcvLEVEL_ERROR, gcvZONE_MMU, + "%s(%d): page table too small for %u pages.\n", + __FUNCTION__, __LINE__, + PageCount + ); + + /* Not enough pages avaiable. */ + return gcvSTATUS_OUT_OF_RESOURCES; + } + + /* Grab the mutex. */ + status = gckOS_AcquireMutex(Mmu->os, Mmu->mutex, gcvINFINITE); + + if (status < 0) + { + gcmkTRACE_ZONE( + gcvLEVEL_ERROR, gcvZONE_MMU, + "%s(%d): could not acquire mutex.\n" + ,__FUNCTION__, __LINE__ + ); + + /* Error. */ + return status; + } + + /* Compute the tail for this allocation. */ + tail = Mmu->entryCount - PageCount; + + /* Walk all entries until we find enough slots. */ + for (index = Mmu->entry; index <= tail;) + { + /* Access page table. */ + table = (gctUINT32 *) Mmu->pageTableLogical + index; + + /* See if all slots are available. */ + for (i = 0; i < PageCount; i++, table++) + { + if (*table != ~0) + { + /* Start from next slot. */ + index += i + 1; + break; + } + } + + if (i == PageCount) + { + /* Bail out if we have enough page entries. */ + allocated = gcvTRUE; + break; + } + } + + if (!allocated) + { + /* Flush the MMU. */ + status = gckVGHARDWARE_FlushMMU(Mmu->hardware); + + if (status >= 0) + { + /* Walk all entries until we find enough slots. */ + for (index = 0; index <= tail;) + { + /* Access page table. */ + table = (gctUINT32 *) Mmu->pageTableLogical + index; + + /* See if all slots are available. */ + for (i = 0; i < PageCount; i++, table++) + { + if (*table != ~0) + { + /* Start from next slot. */ + index += i + 1; + break; + } + } + + if (i == PageCount) + { + /* Bail out if we have enough page entries. */ + allocated = gcvTRUE; + break; + } + } + } + } + + if (!allocated && (status >= 0)) + { + gcmkTRACE_ZONE( + gcvLEVEL_ERROR, gcvZONE_MMU, + "%s(%d): not enough free pages for %u pages.\n", + __FUNCTION__, __LINE__, + PageCount + ); + + /* Not enough empty slots available. */ + status = gcvSTATUS_OUT_OF_RESOURCES; + } + + if (status >= 0) + { + /* Build virtual address. */ + status = gckVGHARDWARE_BuildVirtualAddress(Mmu->hardware, + index, + 0, + Address); + + if (status >= 0) + { + /* Update current entry into page table. */ + Mmu->entry = index + PageCount; + + /* Return pointer to page table. */ + *PageTable = (gctUINT32 *) Mmu->pageTableLogical + index; + + gcmkTRACE_ZONE( + gcvLEVEL_INFO, gcvZONE_MMU, + "%s(%d): allocated %u pages at index %u (0x%08X) @ %p.\n", + __FUNCTION__, __LINE__, + PageCount, + index, + *Address, + *PageTable + ); + } + } + + /* Release the mutex. */ + gcmkVERIFY_OK(gckOS_ReleaseMutex(Mmu->os, Mmu->mutex)); + gcmkFOOTER(); + + /* Return status. */ + return status; +} + +/******************************************************************************* +** +** gckVGMMU_FreePages +** +** Free pages inside the page table. +** +** INPUT: +** +** gckVGMMU Mmu +** Pointer to an gckVGMMU object. +** +** gctPOINTER PageTable +** Base address of the page table to free. +** +** gctSIZE_T PageCount +** Number of pages to free. +** +** OUTPUT: +** +** Nothing. +*/ +gceSTATUS gckVGMMU_FreePages( + IN gckVGMMU Mmu, + IN gctPOINTER PageTable, + IN gctSIZE_T PageCount + ) +{ + gctUINT32 * table; + + gcmkHEADER_ARG("Mmu=0x%x PageTable=0x%x PageCount=0x%x", + Mmu, PageTable, PageCount); + + /* Verify the arguments. */ + gcmkVERIFY_OBJECT(Mmu, gcvOBJ_MMU); + gcmkVERIFY_ARGUMENT(PageTable != gcvNULL); + gcmkVERIFY_ARGUMENT(PageCount > 0); + + gcmkTRACE_ZONE( + gcvLEVEL_INFO, gcvZONE_MMU, + "%s(%d): freeing %u pages at index %u @ %p.\n", + __FUNCTION__, __LINE__, + PageCount, + ((gctUINT32 *) PageTable - (gctUINT32 *) Mmu->pageTableLogical), + PageTable + ); + + /* Convert pointer. */ + table = (gctUINT32 *) PageTable; + + /* Mark the page table entries as available. */ + while (PageCount-- > 0) + { + *table++ = (gctUINT32)~0; + } + + gcmkFOOTER_NO(); + /* Success. */ + return gcvSTATUS_OK; +} + +gceSTATUS +gckVGMMU_SetPage( + IN gckVGMMU Mmu, + IN gctUINT32 PageAddress, + IN gctUINT32 *PageEntry + ) +{ + gcmkHEADER_ARG("Mmu=0x%x", Mmu); + + /* Verify the arguments. */ + gcmkVERIFY_OBJECT(Mmu, gcvOBJ_MMU); + gcmkVERIFY_ARGUMENT(PageEntry != gcvNULL); + gcmkVERIFY_ARGUMENT(!(PageAddress & 0xFFF)); + + *PageEntry = PageAddress; + + /* Success. */ + gcmkFOOTER_NO(); + return gcvSTATUS_OK; +} + +#endif /* gcdENABLE_VG */ |