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Make xf86 linear allocator smarter when dealing with alignment constraints 

when falling back to X/Y allocations. Fixes various problems of Xv
    allocation failures, notably with "nv" driver.
This commit is contained in:
Benjamin Herrenschmidt 2006-03-15 03:12:32 +00:00
parent c1601717d5
commit 02d80a0de9
2 changed files with 17 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-03-15 Benjamin Herrenschmidt <benh@kernel.crashing.org>
* hw/xfree86/common/xf86fbman.c: (localAllocateOffscreenLinear):
Make xf86 linear allocator smarter when dealing with alignment
constraints when falling back to X/Y allocations. Fixes various
problems of Xv allocation failures, notably with "nv" driver.
2006-03-14 Eric Anholt <anholt@FreeBSD.org>
* exa/exa.c: (exaDriverInit):

12
hw/xfree86/common/xf86fbman.c
View File

@ -923,7 +923,7 @@ localAllocateOffscreenLinear(
ErrorF("ALLOCATING LINEAR\n");
#endif
if ((linear = AllocateLinear(offman, length, gran, privData)))
return linear;
return linear;
#ifdef DEBUG
ErrorF("NOPE, ALLOCATING AREA\n");
@ -936,11 +936,17 @@ localAllocateOffscreenLinear(
extents = REGION_EXTENTS(pScreen, offman->InitialBoxes);
pitch = extents->x2 - extents->x1;
if(gran && ((gran > pitch) || (pitch % gran))) {
if (gran && gran > pitch) {
/* we can't match the specified alignment with XY allocations */
xfree(link);
return NULL;
}
if (gran && (pitch % gran)) {
/* pitch and granularity aren't a perfect match, let's allocate
* a bit more so we can align later on
*/
length += gran - 1;
}
if(length < pitch) { /* special case */
w = length;
@ -963,6 +969,8 @@ localAllocateOffscreenLinear(
linear->pScreen = pScreen;
linear->size = h * w;
linear->offset = (pitch * area->box.y1) + area->box.x1;
if (gran && linear->offset % gran)
linear->offset += gran - (linear->offset % gran);
linear->granularity = gran;
linear->MoveLinearCallback = moveCB;
linear->RemoveLinearCallback = removeCB;