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drm/nv50: fix a couple of vm init issues 

Fixes overwriting the first page table entry when testing that the PRAMIN
BAR can be correctly read/written, and adds an additional bar flush after
poking the BAR3 control regs.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
hifive-unleashed-5.1
Francisco Jerez 2010-12-16 10:30:35 +10:00 committed by Ben Skeggs
parent fd70b6cd78
commit c45aadabb9
1 changed files with 7 additions and 6 deletions
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13
drivers/gpu/drm/nouveau/nv50_instmem.c
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@ -182,16 +182,17 @@ nv50_instmem_init(struct drm_device *dev)
nv_wr32(dev, 0x001704, 0x40000000 | (chan->ramin->vinst >> 12));
nv_wr32(dev, 0x00170c, 0x80000000 | (priv->bar3_dmaobj->cinst >> 4));
tmp = nv_ri32(dev, 0);
nv_wi32(dev, 0, ~tmp);
if (nv_ri32(dev, 0) != ~tmp) {
dev_priv->engine.instmem.flush(dev);
dev_priv->ramin_available = true;
tmp = nv_ro32(chan->ramin, 0);
nv_wo32(chan->ramin, 0, ~tmp);
if (nv_ro32(chan->ramin, 0) != ~tmp) {
NV_ERROR(dev, "PRAMIN readback failed\n");
ret = -EIO;
goto error;
}
nv_wi32(dev, 0, tmp);
dev_priv->ramin_available = true;
nv_wo32(chan->ramin, 0, tmp);
/* BAR1 */
ret = nouveau_vm_new(dev, BAR1_VM_BASE, BAR1_VM_SIZE, BAR1_VM_BASE,