Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

needed to bump the DMA command buffer forced freespace up to 256 words: NV4_GDI_RECT needs a higher setting than the old version. Hopefully engine crashes are now past tense...

Browse Source 
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11095 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2005-01-27 15:58:59 +00:00
parent 9c47d9cb0a
commit 7309e1cd85
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/add-ons/accelerants/nvidia/engine/nv_acc_dma.c
View File

@ -866,18 +866,18 @@ static status_t nv_acc_fifofree_dma(uint16 cmd_size)
/* mind this pittfall:
* Leave some room between where the engine is fetching and where we
* put new commands. Otherwise the engine will crash on heavy loads.
* A crash can be forced best in 640x480 resolution with BeRoMeter 1.2.6.
* (confirmed on NV11 and NV43 with less than 128 words forced freespace.)
* A crash can be forced best in 640x480x32 mode with BeRoMeter 1.2.6.
* (confirmed on NV11 and NV43 with less than 256 words forced freespace.)
* Note:
* The engine is DMA triggered for fetching chunks every 128 bytes,
* maybe this is the reason for this behaviour.
* Note also:
* it looks like the space that needs to be kept free is coupled
* with the size of the DMA buffer. */
if (si->engine.dma.free < 128)
if (si->engine.dma.free < 256)
si->engine.dma.free = 0;
else
si->engine.dma.free -= 128;
si->engine.dma.free -= 256;
}
}
else
@ -890,18 +890,18 @@ static status_t nv_acc_fifofree_dma(uint16 cmd_size)
/* mind this pittfall:
* Leave some room between where the engine is fetching and where we
* put new commands. Otherwise the engine will crash on heavy loads.
* A crash can be forced best in 640x480 resolution with BeRoMeter 1.2.6.
* (confirmed on NV11 and NV43 with less than 128 words forced freespace.)
* A crash can be forced best in 640x480x32 mode with BeRoMeter 1.2.6.
* (confirmed on NV11 and NV43 with less than 256 words forced freespace.)
* Note:
* The engine is DMA triggered for fetching chunks every 128 bytes,
* maybe this is the reason for this behaviour.
* Note also:
* it looks like the space that needs to be kept free is coupled
* with the size of the DMA buffer. */
if (si->engine.dma.free < 128)
if (si->engine.dma.free < 256)
si->engine.dma.free = 0;
else
si->engine.dma.free -= 128;
si->engine.dma.free -= 256;
}
}