-void r600_wb_disable(struct radeon_device *rdev)
-{
- int r;
-
- WREG32(SCRATCH_UMSK, 0);
- if (rdev->wb.wb_obj) {
- r = radeon_bo_reserve(rdev->wb.wb_obj, false);
- if (unlikely(r != 0))
- return;
- radeon_bo_kunmap(rdev->wb.wb_obj);
- radeon_bo_unpin(rdev->wb.wb_obj);
- radeon_bo_unreserve(rdev->wb.wb_obj);
- }
-}
-
-void r600_wb_fini(struct radeon_device *rdev)
-{
- r600_wb_disable(rdev);
- if (rdev->wb.wb_obj) {
- radeon_bo_unref(&rdev->wb.wb_obj);
- rdev->wb.wb = NULL;
- rdev->wb.wb_obj = NULL;
- }
-}
-
-int r600_wb_enable(struct radeon_device *rdev)
-{
- int r;
-
- if (rdev->wb.wb_obj == NULL) {
- r = radeon_bo_create(rdev, NULL, RADEON_GPU_PAGE_SIZE, true,
- RADEON_GEM_DOMAIN_GTT, &rdev->wb.wb_obj);
- if (r) {
- dev_warn(rdev->dev, "(%d) create WB bo failed\n", r);
- return r;
- }
- r = radeon_bo_reserve(rdev->wb.wb_obj, false);
- if (unlikely(r != 0)) {
- r600_wb_fini(rdev);
- return r;
- }
- r = radeon_bo_pin(rdev->wb.wb_obj, RADEON_GEM_DOMAIN_GTT,
- &rdev->wb.gpu_addr);
- if (r) {
- radeon_bo_unreserve(rdev->wb.wb_obj);
- dev_warn(rdev->dev, "(%d) pin WB bo failed\n", r);
- r600_wb_fini(rdev);
- return r;
- }
- r = radeon_bo_kmap(rdev->wb.wb_obj, (void **)&rdev->wb.wb);
- radeon_bo_unreserve(rdev->wb.wb_obj);
- if (r) {
- dev_warn(rdev->dev, "(%d) map WB bo failed\n", r);
- r600_wb_fini(rdev);
- return r;
- }
- }
- WREG32(SCRATCH_ADDR, (rdev->wb.gpu_addr >> 8) & 0xFFFFFFFF);
- WREG32(CP_RB_RPTR_ADDR, (rdev->wb.gpu_addr + 1024) & 0xFFFFFFFC);
- WREG32(CP_RB_RPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + 1024) & 0xFF);
- WREG32(SCRATCH_UMSK, 0xff);
- return 0;
-}
-