/**
* intel_register_access_init:
* @pci_dev: intel graphics pci device
* @safe: use safe register access tables
*
* This initializes the new register access library, which supports forcewake
* handling and also allows register access to be checked with an explicit
* whitelist.
*
* It also initializes #igt_global_mmio like intel_mmio_use_pci_bar().
*
* @pci_dev can be obtained from intel_get_pci_device().
*/
int
intel_register_access_init(struct pci_device *pci_dev, int safe)
{
int ret;
/* after old API is deprecated, remove this */
if (igt_global_mmio == NULL)
intel_mmio_use_pci_bar(pci_dev);
igt_assert(igt_global_mmio != NULL);
if (mmio_data.inited)
return -1;
mmio_data.safe = (safe != 0 &&
intel_gen(pci_dev->device_id) >= 4) ? true : false;
mmio_data.i915_devid = pci_dev->device_id;
if (mmio_data.safe)
mmio_data.map = intel_get_register_map(mmio_data.i915_devid);
/* Find where the forcewake lock is. Forcewake doesn't exist
* gen < 6, but the debugfs should do the right things for us.
*/
ret = igt_open_forcewake_handle();
if (ret == -1)
mmio_data.key = FAKEKEY;
else
mmio_data.key = ret;
mmio_data.inited++;
return 0;
}
/*
* Initialize register access library.
*
* @pci_dev: pci device we're mucking with
* @safe: use safe register access tables
*/
int
intel_register_access_init(struct pci_device *pci_dev, int safe)
{
int ret;
/* after old API is deprecated, remove this */
if (mmio == NULL)
intel_get_mmio(pci_dev);
assert(mmio != NULL);
if (mmio_data.inited)
return -1;
mmio_data.safe = safe != 0 ? true : false;
/* Find where the forcewake lock is */
ret = find_debugfs_path("/sys/kernel/debug/dri");
if (ret) {
ret = find_debugfs_path("/debug/dri");
if (ret) {
fprintf(stderr, "Couldn't find path to dri/debugfs entry\n");
return ret;
}
}
mmio_data.i915_devid = pci_dev->device_id;
if (mmio_data.safe)
mmio_data.map = intel_get_register_map(mmio_data.i915_devid);
mmio_data.key = get_forcewake_lock();
mmio_data.inited++;
return 0;
}
