1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <cpu/x86/smm.h>
4 #include <device/device.h>
5 #include <device/pci_def.h>
6 #include <device/pci_ops.h>
7
smm_pci_get_stored_resources(const volatile struct smm_pci_resource_info ** out_slots,size_t * out_size)8 void smm_pci_get_stored_resources(const volatile struct smm_pci_resource_info **out_slots,
9 size_t *out_size)
10 {
11 *out_slots = smm_get_pci_resource_store();
12 *out_size = CONFIG_SMM_PCI_RESOURCE_STORE_NUM_SLOTS;
13 }
14
smm_pci_resource_store_fill_resources(struct smm_pci_resource_info * slots,size_t num_slots,const struct device ** devices,size_t num_devices)15 bool smm_pci_resource_store_fill_resources(struct smm_pci_resource_info *slots, size_t num_slots,
16 const struct device **devices, size_t num_devices)
17 {
18 size_t i_slot = 0;
19
20 for (size_t i_dev = 0; i_dev < num_devices; i_dev++) {
21 if (i_slot >= num_slots) {
22 printk(BIOS_ERR, "Failed to store all PCI resources, number of devices exceeds %zd slots\n",
23 num_slots);
24 return false;
25 }
26
27 if (!is_pci(devices[i_dev])) {
28 printk(BIOS_WARNING, "Skipping storing PCI resources for device at index %zd, not a PCI device\n",
29 i_dev);
30 continue;
31 }
32
33 pci_devfn_t pci_addr = PCI_BDF(devices[i_dev]);
34 slots[i_slot].pci_addr = pci_addr;
35 slots[i_slot].class_device = PCI_CLASS_GET_DEVICE(devices[i_dev]->class);
36 slots[i_slot].class_prog = PCI_CLASS_GET_PROG(devices[i_dev]->class);
37 slots[i_slot].vendor_id = devices[i_dev]->vendor;
38 slots[i_slot].device_id = devices[i_dev]->device;
39
40 size_t i_res = 0;
41 for (const struct resource *res = devices[i_dev]->resource_list; res != NULL;
42 res = res->next) {
43 slots[i_slot].resources[i_res] = *res;
44 slots[i_slot].resources[i_res].next = NULL;
45
46 if (i_res > 0)
47 slots[i_slot].resources[i_res - 1].next = (struct resource *)&slots[i_slot].resources[i_res];
48
49 if (++i_res >= SMM_PCI_RESOURCE_STORE_NUM_RESOURCES) {
50 if (res->next)
51 printk(BIOS_WARNING, "Number of PCI resources exceeds supported storage count\n");
52 break;
53 }
54 }
55
56 i_slot++;
57 }
58
59 return true;
60 }
61
smm_mainboard_pci_resource_store_init(struct smm_pci_resource_info * slots,size_t size)62 void __weak smm_mainboard_pci_resource_store_init(struct smm_pci_resource_info *slots,
63 size_t size)
64 {
65 }
66
smm_pci_resource_store_init(struct smm_runtime * smm_runtime)67 void smm_pci_resource_store_init(struct smm_runtime *smm_runtime)
68 {
69 smm_mainboard_pci_resource_store_init(&smm_runtime->pci_resources[0],
70 CONFIG_SMM_PCI_RESOURCE_STORE_NUM_SLOTS);
71 }
72