src/soc/amd/common/block/iommu/iommu.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <device/device.h>
  16 #include <device/pci.h>
  17 #include <device/pci_ids.h>
  18 #include <lib.h>
  19
  20 static void iommu_read_resources(struct device *dev)
  21 {
  22         struct resource *res;
  23
  24         /* Get the normal pci resources of this device */
  25         pci_dev_read_resources(dev);
  26
  27         /* Add an extra subtractive resource for both memory and I/O. */
  28         res = new_resource(dev, 0x44);
  29         res->size = 512 * 1024;
  30         res->align = log2(res->size);
  31         res->gran = log2(res->size);
  32         res->limit = 0xffffffff;        /* 4G */
  33         res->flags = IORESOURCE_MEM;
  34 }
  35
  36 static struct pci_operations lops_pci = {
  37         .set_subsystem = pci_dev_set_subsystem,
  38 };
  39
  40 static struct device_operations iommu_ops = {
  41         .read_resources = iommu_read_resources,
  42         .set_resources = pci_dev_set_resources,
  43         .enable_resources = pci_dev_enable_resources,
  44         .ops_pci = &lops_pci,
  45 };
  46
  47 static const unsigned short pci_device_ids[] = {
  48         PCI_DEVICE_ID_AMD_15H_MODEL_303F_NB_IOMMU,
  49         PCI_DEVICE_ID_AMD_15H_MODEL_707F_NB_IOMMU,
  50         PCI_DEVICE_ID_AMD_17H_MODEL_101F_NB_IOMMU,
  51         0
  52 };
  53
  54 static const struct pci_driver iommu_driver __pci_driver = {
  55         .ops = &iommu_ops,
  56         .vendor = PCI_VENDOR_ID_AMD,
  57         .devices = pci_device_ids,
  58 };