drm/radeon: fix cayman_vm_set_page v2

Handle requests that won't fit into a single packet.

v2: pe needs to increase as well.
Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/ni.c

@@ -1538,12 +1538,16 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
 {
 	struct radeon_ring *ring = &rdev->ring[rdev->asic->vm.pt_ring_index];
 	uint32_t r600_flags = cayman_vm_page_flags(rdev, flags);
-	int i;
 
-	radeon_ring_write(ring, PACKET3(PACKET3_ME_WRITE, 1 + count * 2));
+	while (count) {
+		unsigned ndw = 1 + count * 2;
+		if (ndw > 0x3FFF)
+			ndw = 0x3FFF;
+
+		radeon_ring_write(ring, PACKET3(PACKET3_ME_WRITE, ndw));
 		radeon_ring_write(ring, pe);
 		radeon_ring_write(ring, upper_32_bits(pe) & 0xff);
-	for (i = 0; i < count; ++i) {
+		for (; ndw > 1; ndw -= 2, --count, pe += 8) {
 			uint64_t value = 0;
 			if (flags & RADEON_VM_PAGE_SYSTEM) {
 				value = radeon_vm_map_gart(rdev, addr);
@@ -1559,6 +1563,7 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
 			radeon_ring_write(ring, value);
 			radeon_ring_write(ring, upper_32_bits(value));
 		}
+	}
 }
 
 /**