MOB: more effective page tables

1 files changed, 54 insertions, 64 deletions

diff --git a/vxd_svga_mem.c b/vxd_svga_mem.c
index 319fb53..361443b 100644
--- a/vxd_svga_mem.c
+++ b/vxd_svga_mem.c
@@ -148,7 +148,12 @@ static DWORD PT_count(DWORD size)
 		return pt2_entries + 1;

 	}

 	

-	return 1;

+	if(pt1_entries > 1)

+	{

+		return 1;

+	}

+	

+	return 0;

 }

 

 /**

@@ -187,9 +192,12 @@ static void PT_build(DWORD size, void *buf, DWORD *outBase, DWORD *outType, void
 		

 		*outBase = getPtrPPN(buf);

 		*outType = SVGA3D_MOBFMT_PTDEPTH_2;

-		*outUserPtr = (void*)ptr;

+		if(outUserPtr)

+		{

+			*outUserPtr = (void*)ptr;

+		}

 	}

-	else

+	else if(pt1_entries > 1)

 	{

 		DWORD *ptbuf = buf;

 		BYTE *ptr = ((BYTE*)buf)+P_SIZE;

@@ -203,7 +211,19 @@ static void PT_build(DWORD size, void *buf, DWORD *outBase, DWORD *outType, void
 		

 		*outBase = getPtrPPN(buf);

 		*outType = SVGA3D_MOBFMT_PTDEPTH_1;

-		*outUserPtr = (void*)ptr;

+		if(outUserPtr)

+		{

+			*outUserPtr = (void*)ptr;

+		}

+	}

+	else

+	{

+		*outBase = getPtrPPN(buf);

+		*outType = SVGA3D_MOBFMT_PTDEPTH_0;

+		if(outUserPtr)

+		{

+			*outUserPtr = (void*)buf;

+		}

 	}

 	

 	dbg_printf(dbg_pt_build, size, *outBase, *outType, *outUserPtr);

@@ -380,9 +400,11 @@ static void cache_delete(int index)
 			dbg_printf(dbg_pagefree, rinfo->mob_address);

 			_PageFree((PVOID)rinfo->mob_address, 0);

 		}

-			

-		dbg_printf(dbg_pagefree, free_ptr);

-		_PageFree((PVOID)free_ptr, 0);

+		else

+		{

+			dbg_printf(dbg_pagefree, free_ptr);

+			_PageFree((PVOID)free_ptr, 0);

+		}

 			

 		cache_state.spare_region[index].used = FALSE;

 		

@@ -505,6 +527,7 @@ static BOOL cache_use(SVGA_region_info_t *region)
 				region->region_ppn     = ptr->region_ppn;

 				region->mob_address    = ptr->mob_address;

 				region->mob_ppn        = ptr->mob_ppn;

+				region->mob_pt_depth   = ptr->mob_pt_depth;

 				

 				cache_state.spare_region[i].used = FALSE;

 				rc = TRUE;

@@ -580,6 +603,7 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
 	ULONG phy = 0;

 #endif

 	ULONG laddr;

+	ULONG maddr = 0;

 	ULONG pgblk;

 	ULONG new_size = RoundTo4k(rinfo->size);	

 	ULONG nPages = RoundToPages(new_size);

@@ -588,6 +612,8 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
 	ULONG pa_type = PG_VM;

 	SVGAGuestMemDescriptor *desc;

 	ULONG size_total = 0;

+	

+	DWORD pt_pages = PT_count(new_size);

 

 #ifdef GMR_SYSTEM

 		pa_vm = 0;

@@ -623,6 +649,7 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
 		rinfo->region_ppn     = (phy/P_SIZE);

 		rinfo->mob_address    = 0;	

 		rinfo->mob_ppn        = (phy/P_SIZE)+1;

+		rinfo->mob_pt_depth   = SVGA3D_MOBFMT_RANGE;

 		

 		//dbg_printf(dbg_region_simple, laddr, rinfo->address);

 		

@@ -639,20 +666,18 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
 		ULONG base_cnt;

 		ULONG blocks = 1;

 		ULONG blk_pages = 0;

-		ULONG mob_pages = 0;

-		

-		DWORD *mob = NULL;

-		//DWORD mobphy = 0;

 		

 		/* allocate user block */

-		laddr = _PageAllocate(nPages, pa_type, pa_vm, pa_align, 0x0, 0x100000, NULL, pa_flags);

-		

-		if(!laddr)

+		maddr = _PageAllocate(nPages+pt_pages, pa_type, pa_vm, pa_align, 0x0, 0x100000, NULL, pa_flags);

+				

+		if(!maddr)

 		{

 			End_Critical_Section();

 			return FALSE;

 		}

 		

+		laddr = maddr + pt_pages*P_SIZE;

+		

 		/* determine how many physical continuous blocks we have */

 		base_ppn = getPPN(laddr);

 		base_cnt = 1;

@@ -725,49 +750,20 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
 		desc->ppn = 0;

 		desc->numPages = 0;

 

+		rinfo->mob_address    = (void*)maddr;

+		rinfo->mob_ppn        = 0;

+		rinfo->mob_pt_depth   = 0;

+

 		if(gb_support) /* don't create MOBs for Gen9 */

 		{

-			int i;

-			/* for simplicity we're always creating table of depth 2, first page is page of PPN pages */

-			//mob = (DWORD *)_PageAllocate(1 + (nPages + PTONPAGE - 1)/PTONPAGE, pa_type, pa_vm, 0, 0x0, 0x100000, &mobphy, PAGECONTIG | PAGEUSEALIGN | PAGEFIXED);

-			mob_pages = 1 + (nPages + PTONPAGE - 1)/PTONPAGE;

-			mob = (DWORD *)_PageAllocate(mob_pages, pa_type, pa_vm, pa_align, 0x0, 0x100000, 0, pa_flags);

-			

-			if(!mob)

-			{

-				_PageFree((PVOID)laddr, 0);

-				_PageFree((PVOID)pgblk, 0);

-				End_Critical_Section();

-				return FALSE;

-			}

-			

-			memset(mob, 0, mob_pages*P_SIZE);

-			

-			/* dim 1 */

-			for(i = 0; i < mob_pages-1; i++)

-			{

-				//mob[i] = (mobphy/P_SIZE) + i + 1;

-				mob[i] = getPPN(((ULONG)mob) + ((i + 1)*P_SIZE));

-			}

-			/* dim 2 */

-			for(i = 0; i < nPages; i++)

-			{

-				mob[PTONPAGE + i] = getPPN(laddr + i*P_SIZE);

-			}

+			PT_build(new_size, (void*)maddr, &rinfo->mob_ppn, &rinfo->mob_pt_depth, NULL);

 		}

 		

 		rinfo->address        = (void*)laddr;

 		rinfo->region_address = (void*)pgblk;

 		rinfo->region_ppn     = getPPN(pgblk);

-		rinfo->mob_address    = (void*)mob;

-		rinfo->mob_ppn        = 0;

-		if(mob)

-		{

-			//rinfo->mob_ppn        = mobphy/P_SIZE;

-			rinfo->mob_ppn        = getPPN((ULONG)mob);

-		}

-		

-		size_total = (nPages + blk_pages + mob_pages)*P_SIZE;

+				

+		size_total = (nPages + blk_pages + pt_pages)*P_SIZE;

 		

 		//dbg_printf(dbg_region_fragmented);

 	}

@@ -807,16 +803,9 @@ BOOL SVGA_region_create(SVGA_region_info_t *rinfo)
   	mob              = SVGA_cmd3d_ptr(cmdbuf, &cmdoff, SVGA_3D_CMD_DEFINE_GB_MOB, sizeof(SVGA3dCmdDefineGBMob));

   	mob->mobid       = rinfo->region_id;

   	mob->base        = rinfo->mob_ppn;

-  	mob->sizeInBytes = rinfo->size;

-		if(rinfo->mob_address == NULL) /* continual memory space */

-		{

-			mob->ptDepth     = SVGA3D_MOBFMT_RANGE;

-		}

-		else

-		{

-			mob->ptDepth     = SVGA3D_MOBFMT_PTDEPTH_2;

-		}

-		

+		mob->ptDepth     = rinfo->mob_pt_depth;

+		mob->sizeInBytes = rinfo->size;

+

 		submit_cmdbuf(cmdoff, SVGA_CB_SYNC, 0);

 		

   	rinfo->is_mob = 1;

@@ -888,12 +877,12 @@ void SVGA_region_free(SVGA_region_info_t *rinfo)
 			

 		if(rinfo->mob_address != NULL)

 		{

-			//dbg_printf(dbg_pagefree, rinfo->mob_address);

 			_PageFree((PVOID)rinfo->mob_address, 0);

 		}

-			

-		//dbg_printf(dbg_pagefree, free_ptr);

-		_PageFree((PVOID)free_ptr, 0);

+		else

+		{

+			_PageFree((PVOID)free_ptr, 0);

+		}

 	}

 	End_Critical_Section();

 		

@@ -904,6 +893,7 @@ void SVGA_region_free(SVGA_region_info_t *rinfo)
 	rinfo->mob_address    = NULL;

 	rinfo->region_ppn     = 0;

 	rinfo->mob_ppn        = 0;

+	rinfo->mob_pt_depth   = 0;

 }

 

 /**