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-rw-r--r--src/lx_memory.c258
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diff --git a/src/lx_memory.c b/src/lx_memory.c
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+/* Copyright (c) 2008 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ *
+ * 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. 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.
+ *
+ * Neither the name of the Advanced Micro Devices, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ */
+
+#include "xf86.h"
+#include "geode.h"
+#include "cim/cim_regs.h"
+
+#define ALIGN(x,y) (((x) + (y) - 1) / (y) * (y))
+#define LX_CB_PITCH 544
+
+/* Geode offscreen memory allocation functions. This is
+ overengineered for the simple hardware that we have, but
+ there are multiple functions that may want to independently
+ allocate and free memory (crtc->shadow_alloc and Xv). This
+ provides a semi-robust mechanism for doing that.
+*/
+
+void
+GeodeFreeOffscreen(GeodeRec * pGeode, GeodeMemPtr ptr)
+{
+ /* There is a clear memory leak here, but
+ * but it is unlikely that the first block of
+ * "allocated" memory is going to be released
+ * individually.
+ */
+
+ if (ptr->prev == NULL)
+ pGeode->offscreenList = ptr->next;
+ else
+ ptr->prev->next = ptr->next;
+
+ if (ptr->next)
+ ptr->next->prev = ptr->prev;
+
+ xfree(ptr);
+}
+
+/* Allocate the "rest" of the offscreen memory - this is for
+ situations where we have very little video memory, and we
+ want to take as much of it as we can for EXA
+*/
+
+static GeodeMemPtr
+GeodeAllocRemainder(GeodeRec * pGeode)
+{
+ GeodeMemPtr nptr, ptr = pGeode->offscreenList;
+
+ if (!pGeode->offscreenList) {
+ pGeode->offscreenList = xcalloc(1, sizeof(*nptr));
+ pGeode->offscreenList->offset = pGeode->offscreenStart;
+ pGeode->offscreenList->size = pGeode->offscreenSize;
+ pGeode->offscreenList->next = NULL;
+ pGeode->offscreenList->prev = NULL;
+
+ return pGeode->offscreenList;
+ }
+
+ /* Go to the end of the list of allocated stuff */
+ for (; ptr->next; ptr = ptr->next) ;
+
+ nptr = xcalloc(1, sizeof(*nptr));
+ nptr->offset = ptr->offset + ptr->size;
+ nptr->size = pGeode->offscreenSize - nptr->offset;
+ nptr->next = ptr->next;
+ nptr->prev = ptr;
+ ptr->next = nptr;
+
+ return nptr;
+}
+
+/* Allocate 'size' bytes of offscreen memory.
+*/
+
+GeodeMemPtr
+GeodeAllocOffscreen(GeodeRec * pGeode, int size, int align)
+{
+ GeodeMemPtr ptr = pGeode->offscreenList;
+ GeodeMemPtr nptr;
+
+ unsigned int offset;
+
+ if (!pGeode->offscreenList) {
+
+ if (size > pGeode->offscreenSize)
+ return NULL;
+
+ offset = ALIGN(pGeode->offscreenStart, align);
+
+ pGeode->offscreenList = xcalloc(1, sizeof(*nptr));
+ pGeode->offscreenList->offset = offset;
+ pGeode->offscreenList->size = size;
+ pGeode->offscreenList->next = NULL;
+
+ return pGeode->offscreenList;
+ }
+
+ while (ptr) {
+ unsigned int gap;
+
+ if (ptr->next == NULL)
+ gap = pGeode->offscreenSize;
+
+ else
+ gap = ptr->next->offset;
+
+ gap = gap - (ptr->offset + ptr->size);
+ gap = ALIGN(gap, align);
+
+ if (size < gap) {
+ offset = ptr->offset + ptr->size;
+ offset = ALIGN(ptr->offset + ptr->size, align);
+
+ nptr = xcalloc(1, sizeof(*nptr));
+ nptr->offset = offset;
+ nptr->size = size;
+ nptr->next = ptr->next;
+ nptr->prev = ptr;
+ ptr->next = nptr;
+
+ return nptr;
+ }
+
+ ptr = ptr->next;
+ }
+
+ return NULL;
+}
+
+/* Carve out the space for the visible screen, and carve out
+ the usual suspects that need offscreen memory
+*/
+
+void
+LXInitOffscreen(ScrnInfoPtr pScrni)
+{
+ GeodeRec *pGeode = GEODEPTR(pScrni);
+ unsigned int fbavail;
+ GeodeMemPtr ptr;
+
+ /* The scratch buffer is always used */
+ fbavail = pGeode->FBAvail - GP3_SCRATCH_BUFFER_SIZE;
+
+ pGeode->displaySize = pScrni->virtualY * pGeode->Pitch;
+
+ pGeode->offscreenStart = pGeode->displaySize;
+ pGeode->offscreenSize = fbavail - pGeode->displaySize;
+
+ /* Allocate the usual memory suspects */
+ if (pGeode->tryCompression) {
+ int size = pScrni->virtualY * LX_CB_PITCH;
+
+ ptr = GeodeAllocOffscreen(pGeode, size, 4);
+
+ if (ptr != NULL) {
+ pGeode->CBData.compression_offset = ptr->offset;
+ pGeode->CBData.size = LX_CB_PITCH;
+ pGeode->CBData.pitch = LX_CB_PITCH;
+
+ pGeode->Compression = TRUE;
+ } else {
+ xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
+ "Not enough memory for compression\n");
+ pGeode->Compression = FALSE;
+ }
+ }
+
+ if (pGeode->tryHWCursor) {
+ ptr = GeodeAllocOffscreen(pGeode, 1024, 4);
+ if (ptr != NULL) {
+ pGeode->CursorStartOffset = ptr->offset;
+ pGeode->HWCursor = TRUE;
+ } else {
+ xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
+ "Not enough memory for the hardware cursor\n");
+ pGeode->HWCursor = FALSE;
+ }
+ }
+
+ if (!pGeode->NoAccel && pGeode->pExa) {
+ int size;
+
+ /* Try to get the scratch buffer for blending */
+ pGeode->exaBfrOffset = 0;
+
+ if (pGeode->exaBfrSz > 0) {
+ ptr = GeodeAllocOffscreen(pGeode, pGeode->exaBfrSz, 4);
+ if (ptr != NULL)
+ pGeode->exaBfrOffset = ptr->offset;
+ }
+
+ pGeode->pExa->offScreenBase = 0;
+ pGeode->pExa->memorySize = 0;
+
+ /* In a break from the previous behavior, we will
+ * allocate 3 screens worth of offscreen memory.
+ * (that means, 3 * y * (x * bpp) - not the compressed
+ * pitch if it is enabled). */
+
+ /* FIXME: Make this configurable */
+
+ size = 3 * (pScrni->virtualY *
+ ((pScrni->virtualX + 3) & ~3) * (pScrni->bitsPerPixel >> 3));
+
+ ptr = GeodeAllocOffscreen(pGeode, size, 4);
+
+ if (ptr == NULL) {
+ /* If we couldn't allocate what we wanted,
+ * then allocate whats left */
+
+ ptr = GeodeAllocRemainder(pGeode);
+ }
+
+ if (ptr) {
+ pGeode->pExa->offScreenBase = ptr->offset;
+ pGeode->pExa->memorySize = ptr->offset + ptr->size;
+ }
+ }
+}
+
+/* Called as we go down, so blitz everybody */
+
+void
+GeodeCloseOffscreen(ScrnInfoPtr pScrni)
+{
+ GeodeRec *pGeode = GEODEPTR(pScrni);
+ GeodeMemPtr ptr = pGeode->offscreenList;
+ GeodeMemPtr nptr;
+
+ while (ptr) {
+ nptr = ptr->next;
+ xfree(ptr);
+ ptr = nptr;
+ }
+
+ pGeode->offscreenList = NULL;
+}
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