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+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/i810/i810_memory.c,v 1.27 2002/12/10 01:27:05 dawes Exp $ */
+/**************************************************************************
+
+Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+All Rights Reserved.
+
+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, sub license, 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 (including the
+next paragraph) 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 NON-INFRINGEMENT.
+IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
+
+**************************************************************************/
+
+/*
+ * Reformatted with GNU indent (2.2.8), using the following options:
+ *
+ * -bad -bap -c41 -cd0 -ncdb -ci6 -cli0 -cp0 -ncs -d0 -di3 -i3 -ip3 -l78
+ * -lp -npcs -psl -sob -ss -br -ce -sc -hnl
+ *
+ * This provides a good match with the original i810 code and preferred
+ * XFree86 formatting conventions.
+ *
+ * When editing this driver, please follow the existing formatting, and edit
+ * with <TAB> characters expanded at 8-column intervals.
+ */
+
+/*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ *
+ */
+
+#include "xf86.h"
+#include "xf86_ansic.h"
+#include "xf86_OSproc.h"
+
+#include "i810.h"
+#include "i810_reg.h"
+
+int
+I810AllocLow(I810MemRange * result, I810MemRange * pool, int size)
+{
+ if (size > pool->Size)
+ return 0;
+
+ pool->Size -= size;
+ result->Size = size;
+ result->Start = pool->Start;
+ result->End = pool->Start += size;
+
+ return 1;
+}
+
+int
+I810AllocHigh(I810MemRange * result, I810MemRange * pool, int size)
+{
+ if (size > pool->Size)
+ return 0;
+
+ pool->Size -= size;
+ result->Size = size;
+ result->End = pool->End;
+ result->Start = pool->End -= size;
+
+ return 1;
+}
+
+int
+I810AllocateGARTMemory(ScrnInfoPtr pScrn)
+{
+ unsigned long size = pScrn->videoRam * 1024;
+ I810Ptr pI810 = I810PTR(pScrn);
+ int key;
+ long tom = 0;
+ unsigned long physical;
+
+ if (!xf86AgpGARTSupported() || !xf86AcquireGART(pScrn->scrnIndex)) {
+ xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+ "AGP GART support is either not available or cannot be used.\n"
+ "\tMake sure your kernel has agpgart support or has the\n"
+ "\tagpgart module loaded.\n");
+ return FALSE;
+ }
+
+ /* This allows the 2d only Xserver to regen */
+ pI810->agpAcquired2d = TRUE;
+
+ /*
+ * I810/I815
+ *
+ * Treat the gart like video memory - we assume we own all that is
+ * there, so ignore EBUSY errors. Don't try to remove it on
+ * failure, either, as other X server may be using it.
+ */
+
+ if ((key = xf86AllocateGARTMemory(pScrn->scrnIndex, size, 0, NULL)) == -1)
+ return FALSE;
+
+ pI810->VramOffset = 0;
+ pI810->VramKey = key;
+
+ if (!xf86BindGARTMemory(pScrn->scrnIndex, key, 0))
+ return FALSE;
+
+ pI810->SysMem.Start = 0;
+ pI810->SysMem.Size = size;
+ pI810->SysMem.End = size;
+ pI810->SavedSysMem = pI810->SysMem;
+
+ tom = pI810->SysMem.End;
+
+ pI810->DcacheMem.Start = 0;
+ pI810->DcacheMem.End = 0;
+ pI810->DcacheMem.Size = 0;
+ pI810->CursorPhysical = 0;
+
+ /*
+ * Dcache - half the speed of normal ram, so not really useful for
+ * a 2d server. Don't bother reporting its presence. This is
+ * mapped in addition to the requested amount of system ram.
+ */
+
+ size = 1024 * 4096;
+
+ /*
+ * Keep it 512K aligned for the sake of tiled regions.
+ */
+
+ tom += 0x7ffff;
+ tom &= ~0x7ffff;
+
+ if ((key = xf86AllocateGARTMemory(pScrn->scrnIndex, size, 1, NULL)) != -1) {
+ pI810->DcacheOffset = tom;
+ pI810->DcacheKey = key;
+ if (!xf86BindGARTMemory(pScrn->scrnIndex, key, tom)) {
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+ "Allocation of %d bytes for DCACHE failed\n", size);
+ pI810->DcacheKey = -1;
+ } else {
+ pI810->DcacheMem.Start = tom;
+ pI810->DcacheMem.Size = size;
+ pI810->DcacheMem.End = pI810->DcacheMem.Start + pI810->DcacheMem.Size;
+ tom = pI810->DcacheMem.End;
+ }
+ } else {
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+ "No physical memory available for %d bytes of DCACHE\n",
+ size);
+ pI810->DcacheKey = -1;
+ }
+
+ /*
+ * Mouse cursor -- The i810 (crazy) needs a physical address in
+ * system memory from which to upload the cursor. We get this from
+ * the agpgart module using a special memory type.
+ */
+
+ /*
+ * 4k for the cursor is excessive, I'm going to steal 3k for
+ * overlay registers later
+ */
+
+ size = 4096;
+
+ if ((key =
+ xf86AllocateGARTMemory(pScrn->scrnIndex, size, 2, &physical)) == -1) {
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+ "No physical memory available for HW cursor\n");
+ pI810->HwcursKey = -1;
+ pI810->CursorStart = 0;
+ } else {
+ pI810->HwcursOffset = tom;
+ pI810->HwcursKey = key;
+ if (!xf86BindGARTMemory(pScrn->scrnIndex, key, tom)) {
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+ "Allocation of %d bytes for HW cursor failed\n", size);
+ pI810->HwcursKey = -1;
+ } else {
+ pI810->CursorPhysical = physical;
+ pI810->CursorStart = tom;
+ tom += size;
+ }
+ }
+
+ /*
+ * Overlay register buffer -- Just like the cursor, the i810 needs a
+ * physical address in system memory from which to upload the overlay
+ * registers.
+ */
+
+ if (pI810->CursorStart != 0) {
+ pI810->OverlayPhysical = pI810->CursorPhysical + 1024;
+ pI810->OverlayStart = pI810->CursorStart + 1024;
+ }
+
+ pI810->GttBound = 1;
+
+ return TRUE;
+}
+
+/* Tiled memory is good... really, really good...
+ *
+ * Need to make it less likely that we miss out on this - probably
+ * need to move the frontbuffer away from the 'guarenteed' alignment
+ * of the first memory segment, or perhaps allocate a discontigous
+ * framebuffer to get more alignment 'sweet spots'.
+ */
+void
+I810SetTiledMemory(ScrnInfoPtr pScrn, int nr, unsigned int start,
+ unsigned int pitch, unsigned int size)
+{
+ I810Ptr pI810 = I810PTR(pScrn);
+ I810RegPtr i810Reg = &pI810->ModeReg;
+ CARD32 val;
+ CARD32 fence_mask = 0;
+
+ if (nr < 0 || nr > 7) {
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex, "%s - fence %d out of range\n",
+ "I810SetTiledMemory", nr);
+ return;
+ }
+
+ i810Reg->Fence[nr] = 0;
+
+ fence_mask = ~FENCE_START_MASK;
+
+ if (start & fence_mask) {
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
+ "%s %d: start (%x) is not 512k aligned\n",
+ "I810SetTiledMemory", nr, start);
+ return;
+ }
+
+ if (start % size) {
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
+ "%s %d: start (%x) is not size (%x) aligned\n",
+ "I810SetTiledMemory", nr, start, size);
+ return;
+ }
+
+ if (pitch & 127) {
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
+ "%s %d: pitch (%x) not a multiple of 128 bytes\n",
+ "I810SetTiledMemory", nr, pitch);
+ return;
+ }
+
+ val = (start | FENCE_X_MAJOR | FENCE_VALID);
+
+ switch (size) {
+ case KB(512):
+ val |= FENCE_SIZE_512K;
+ break;
+ case MB(1):
+ val |= FENCE_SIZE_1M;
+ break;
+ case MB(2):
+ val |= FENCE_SIZE_2M;
+ break;
+ case MB(4):
+ val |= FENCE_SIZE_4M;
+ break;
+ case MB(8):
+ val |= FENCE_SIZE_8M;
+ break;
+ case MB(16):
+ val |= FENCE_SIZE_16M;
+ break;
+ case MB(32):
+ val |= FENCE_SIZE_32M;
+ break;
+ default:
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
+ "%s %d: illegal size (0x%x)\n", "I810SetTiledMemory", nr,
+ size);
+ return;
+ }
+
+ switch (pitch / 128) {
+ case 1:
+ val |= FENCE_PITCH_1;
+ break;
+ case 2:
+ val |= FENCE_PITCH_2;
+ break;
+ case 4:
+ val |= FENCE_PITCH_4;
+ break;
+ case 8:
+ val |= FENCE_PITCH_8;
+ break;
+ case 16:
+ val |= FENCE_PITCH_16;
+ break;
+ case 32:
+ val |= FENCE_PITCH_32;
+ break;
+ default:
+ xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
+ "%s %d: illegal size (0x%x)\n", "I810SetTiledMemory", nr,
+ size);
+ return;
+ }
+
+ i810Reg->Fence[nr] = val;
+}
+
+Bool
+I810BindGARTMemory(ScrnInfoPtr pScrn)
+{
+ I810Ptr pI810 = I810PTR(pScrn);
+
+ if (xf86AgpGARTSupported() && !pI810->directRenderingEnabled
+ && !pI810->GttBound) {
+ if (!xf86AcquireGART(pScrn->scrnIndex))
+ return FALSE;
+
+ if (pI810->VramKey != -1
+ && !xf86BindGARTMemory(pScrn->scrnIndex, pI810->VramKey,
+ pI810->VramOffset))
+ return FALSE;
+
+ if (pI810->DcacheKey != -1
+ && !xf86BindGARTMemory(pScrn->scrnIndex, pI810->DcacheKey,
+ pI810->DcacheOffset))
+ return FALSE;
+
+ if (pI810->HwcursKey != -1
+ && !xf86BindGARTMemory(pScrn->scrnIndex, pI810->HwcursKey,
+ pI810->HwcursOffset))
+ return FALSE;
+
+ pI810->GttBound = 1;
+ }
+
+ return TRUE;
+}
+
+Bool
+I810UnbindGARTMemory(ScrnInfoPtr pScrn)
+{
+ I810Ptr pI810 = I810PTR(pScrn);
+
+ if (xf86AgpGARTSupported() && !pI810->directRenderingEnabled
+ && pI810->GttBound) {
+ if (pI810->VramKey != -1
+ && !xf86UnbindGARTMemory(pScrn->scrnIndex, pI810->VramKey))
+ return FALSE;
+
+ if (pI810->DcacheKey != -1
+ && !xf86UnbindGARTMemory(pScrn->scrnIndex, pI810->DcacheKey))
+ return FALSE;
+
+ if (pI810->HwcursKey != -1
+ && !xf86UnbindGARTMemory(pScrn->scrnIndex, pI810->HwcursKey))
+ return FALSE;
+
+ if (!xf86ReleaseGART(pScrn->scrnIndex))
+ return FALSE;
+
+ pI810->GttBound = 0;
+ }
+
+ return TRUE;
+}
+
+int
+I810CheckAvailableMemory(ScrnInfoPtr pScrn)
+{
+ AgpInfoPtr agpinf;
+ int maxPages;
+
+ if (!xf86AgpGARTSupported() ||
+ !xf86AcquireGART(pScrn->scrnIndex) ||
+ (agpinf = xf86GetAGPInfo(pScrn->scrnIndex)) == NULL ||
+ !xf86ReleaseGART(pScrn->scrnIndex))
+ return -1;
+
+ maxPages = agpinf->totalPages - agpinf->usedPages;
+ xf86DrvMsgVerb(pScrn->scrnIndex, X_INFO, 2, "%s: %dk available\n",
+ "I810CheckAvailableMemory", maxPages * 4);
+
+ return maxPages * 4;
+}
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