src/soc/intel/common/block/tracehub/tracehub.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/pci.h>
   5 #include <device/pci_ids.h>
   6 #include <fsp/util.h>
   7
   8 static const uint8_t fsp_tracehub_guid[16] = {
   9         0x09, 0x59, 0xb3, 0x5f, 0x1c, 0x5a, 0x31, 0x4a,
  10         0xad, 0xaf, 0x57, 0x7b, 0x54, 0x68, 0x26, 0x3f,
  11 };
  12
  13 static void tracehub_read_resources(struct device *dev)
  14 {
  15         const struct hob_resource *tracehub_info_hob;
  16
  17         /* Read standard PCI resources. */
  18         pci_dev_read_resources(dev);
  19
  20         /*
  21          * Find the Trace Hub HOB generated by Intel FSP. If the Trace Hub
  22          * is configured to save data in DRAM, FSP will generate this HOB.
  23          * This HOB contains address and length of the memory region used
  24          * by Trace Hub to save traces. Mark this memory region as reserved.
  25          */
  26         tracehub_info_hob = fsp_find_resource_hob_by_guid(fsp_tracehub_guid);
  27         if (!tracehub_info_hob) {
  28                 printk(BIOS_INFO, "Trace Hub HOB not found\n");
  29                 return;
  30         }
  31         printk(BIOS_DEBUG, "Trace Hub HOB found: addr=0x%08llx length=0x%08llx\n",
  32                         tracehub_info_hob->addr, tracehub_info_hob->length);
  33         reserved_ram_range(dev, 0, tracehub_info_hob->addr,
  34                            tracehub_info_hob->length);
  35 }
  36
  37 static struct device_operations dev_ops = {
  38         .read_resources         = tracehub_read_resources,
  39         .set_resources          = pci_dev_set_resources,
  40         .enable_resources       = pci_dev_enable_resources,
  41         .ops_pci                = &pci_dev_ops_pci,
  42 };
  43
  44 static const unsigned short pci_device_ids[] = {
  45         PCI_DID_INTEL_PTL_H_TRACEHUB,
  46         PCI_DID_INTEL_PTL_U_H_TRACEHUB,
  47         PCI_DID_INTEL_MTL_TRACEHUB,
  48         PCI_DID_INTEL_RPL_TRACEHUB,
  49         0
  50 };
  51
  52 static const struct pci_driver tracehub_driver __pci_driver = {
  53         .ops            = &dev_ops,
  54         .vendor         = PCI_VID_INTEL,
  55         .devices        = pci_device_ids,
  56 };