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drm/nvc0: improve vm flush function

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-03-30 13:57:44 +10:00
parent e61e51f134
commit a719726f4c
1 changed files with 15 additions and 9 deletions
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24
drivers/gpu/drm/nouveau/nvc0_vm.c
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@ -104,20 +104,26 @@ nvc0_vm_flush(struct nouveau_vm *vm)
struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
struct drm_device *dev = vm->dev;
struct nouveau_vm_pgd *vpgd;
u32 r100c80, engine;
u32 engine = (dev_priv->chan_vm == vm) ? 1 : 5;
pinstmem->flush(vm->dev);
if (vm == dev_priv->chan_vm)
engine = 1;
else
engine = 5;
spin_lock(&dev_priv->ramin_lock);
list_for_each_entry(vpgd, &vm->pgd_list, head) {
r100c80 = nv_rd32(dev, 0x100c80);
/* looks like maybe a "free flush slots" counter, the
* faster you write to 0x100cbc to more it decreases
*/
if (!nv_wait_ne(dev, 0x100c80, 0x00ff0000, 0x00000000)) {
NV_ERROR(dev, "vm timeout 0: 0x%08x %d\n",
nv_rd32(dev, 0x100c80), engine);
}
nv_wr32(dev, 0x100cb8, vpgd->obj->vinst >> 8);
nv_wr32(dev, 0x100cbc, 0x80000000 | engine);
if (!nv_wait(dev, 0x100c80, 0xffffffff, r100c80))
NV_ERROR(dev, "vm flush timeout eng %d\n", engine);
/* wait for flush to be queued? */
if (!nv_wait(dev, 0x100c80, 0x00008000, 0x00008000)) {
NV_ERROR(dev, "vm timeout 1: 0x%08x %d\n",
nv_rd32(dev, 0x100c80), engine);
}
}
spin_unlock(&dev_priv->ramin_lock);
}