| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <fsp/util.h> |
| |
| static const uint8_t fsp_tracehub_guid[16] = { |
| 0x09, 0x59, 0xb3, 0x5f, 0x1c, 0x5a, 0x31, 0x4a, |
| 0xad, 0xaf, 0x57, 0x7b, 0x54, 0x68, 0x26, 0x3f, |
| }; |
| |
| static void tracehub_read_resources(struct device *dev) |
| { |
| const struct hob_resource *tracehub_info_hob; |
| |
| /* Read standard PCI resources. */ |
| pci_dev_read_resources(dev); |
| |
| /* |
| * Find the Trace Hub HOB generated by Intel FSP. If the Trace Hub |
| * is configured to save data in DRAM, FSP will generate this HOB. |
| * This HOB contains address and length of the memory region used |
| * by Trace Hub to save traces. Mark this memory region as reserved. |
| */ |
| tracehub_info_hob = fsp_find_resource_hob_by_guid(fsp_tracehub_guid); |
| if (!tracehub_info_hob) { |
| printk(BIOS_INFO, "Trace Hub HOB not found\n"); |
| return; |
| } |
| printk(BIOS_DEBUG, "Trace Hub HOB found: addr=0x%08llx length=0x%08llx\n", |
| tracehub_info_hob->addr, tracehub_info_hob->length); |
| reserved_ram_resource_kb(dev, 0, tracehub_info_hob->addr / KiB, |
| tracehub_info_hob->length / KiB); |
| } |
| |
| static struct device_operations dev_ops = { |
| .read_resources = tracehub_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .ops_pci = &pci_dev_ops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| PCI_DID_INTEL_MTL_TRACEHUB, |
| 0 |
| }; |
| |
| static const struct pci_driver tracehub_driver __pci_driver = { |
| .ops = &dev_ops, |
| .vendor = PCI_VID_INTEL, |
| .devices = pci_device_ids, |
| }; |