1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved
4 */
5
6 #include "qemu/osdep.h"
7 #include "hw/acpi/acpi_generic_initiator.h"
8 #include "hw/acpi/aml-build.h"
9 #include "hw/boards.h"
10 #include "hw/pci/pci_device.h"
11 #include "qemu/error-report.h"
12
13 typedef struct AcpiGenericInitiatorClass {
14 ObjectClass parent_class;
15 } AcpiGenericInitiatorClass;
16
17 OBJECT_DEFINE_TYPE_WITH_INTERFACES(AcpiGenericInitiator, acpi_generic_initiator,
18 ACPI_GENERIC_INITIATOR, OBJECT,
19 { TYPE_USER_CREATABLE },
20 { NULL })
21
OBJECT_DECLARE_SIMPLE_TYPE(AcpiGenericInitiator,ACPI_GENERIC_INITIATOR)22 OBJECT_DECLARE_SIMPLE_TYPE(AcpiGenericInitiator, ACPI_GENERIC_INITIATOR)
23
24 static void acpi_generic_initiator_init(Object *obj)
25 {
26 AcpiGenericInitiator *gi = ACPI_GENERIC_INITIATOR(obj);
27
28 gi->node = MAX_NODES;
29 gi->pci_dev = NULL;
30 }
31
acpi_generic_initiator_finalize(Object * obj)32 static void acpi_generic_initiator_finalize(Object *obj)
33 {
34 AcpiGenericInitiator *gi = ACPI_GENERIC_INITIATOR(obj);
35
36 g_free(gi->pci_dev);
37 }
38
acpi_generic_initiator_set_pci_device(Object * obj,const char * val,Error ** errp)39 static void acpi_generic_initiator_set_pci_device(Object *obj, const char *val,
40 Error **errp)
41 {
42 AcpiGenericInitiator *gi = ACPI_GENERIC_INITIATOR(obj);
43
44 gi->pci_dev = g_strdup(val);
45 }
46
acpi_generic_initiator_set_node(Object * obj,Visitor * v,const char * name,void * opaque,Error ** errp)47 static void acpi_generic_initiator_set_node(Object *obj, Visitor *v,
48 const char *name, void *opaque,
49 Error **errp)
50 {
51 AcpiGenericInitiator *gi = ACPI_GENERIC_INITIATOR(obj);
52 MachineState *ms = MACHINE(qdev_get_machine());
53 uint32_t value;
54
55 if (!visit_type_uint32(v, name, &value, errp)) {
56 return;
57 }
58
59 if (value >= MAX_NODES) {
60 error_printf("%s: Invalid NUMA node specified\n",
61 TYPE_ACPI_GENERIC_INITIATOR);
62 exit(1);
63 }
64
65 gi->node = value;
66 ms->numa_state->nodes[gi->node].has_gi = true;
67 }
68
acpi_generic_initiator_class_init(ObjectClass * oc,void * data)69 static void acpi_generic_initiator_class_init(ObjectClass *oc, void *data)
70 {
71 object_class_property_add_str(oc, "pci-dev", NULL,
72 acpi_generic_initiator_set_pci_device);
73 object_class_property_add(oc, "node", "int", NULL,
74 acpi_generic_initiator_set_node, NULL, NULL);
75 }
76
77 /*
78 * ACPI 6.3:
79 * Table 5-78 Generic Initiator Affinity Structure
80 */
81 static void
build_srat_generic_pci_initiator_affinity(GArray * table_data,int node,PCIDeviceHandle * handle)82 build_srat_generic_pci_initiator_affinity(GArray *table_data, int node,
83 PCIDeviceHandle *handle)
84 {
85 uint8_t index;
86
87 build_append_int_noprefix(table_data, 5, 1); /* Type */
88 build_append_int_noprefix(table_data, 32, 1); /* Length */
89 build_append_int_noprefix(table_data, 0, 1); /* Reserved */
90 build_append_int_noprefix(table_data, 1, 1); /* Device Handle Type: PCI */
91 build_append_int_noprefix(table_data, node, 4); /* Proximity Domain */
92
93 /* Device Handle - PCI */
94 build_append_int_noprefix(table_data, handle->segment, 2);
95 build_append_int_noprefix(table_data, PCI_BUS_NUM(handle->bdf), 1);
96 build_append_int_noprefix(table_data, PCI_BDF_TO_DEVFN(handle->bdf), 1);
97 for (index = 0; index < 12; index++) {
98 build_append_int_noprefix(table_data, 0, 1);
99 }
100
101 build_append_int_noprefix(table_data, GEN_AFFINITY_ENABLED, 4); /* Flags */
102 build_append_int_noprefix(table_data, 0, 4); /* Reserved */
103 }
104
build_all_acpi_generic_initiators(Object * obj,void * opaque)105 static int build_all_acpi_generic_initiators(Object *obj, void *opaque)
106 {
107 MachineState *ms = MACHINE(qdev_get_machine());
108 AcpiGenericInitiator *gi;
109 GArray *table_data = opaque;
110 PCIDeviceHandle dev_handle;
111 PCIDevice *pci_dev;
112 Object *o;
113
114 if (!object_dynamic_cast(obj, TYPE_ACPI_GENERIC_INITIATOR)) {
115 return 0;
116 }
117
118 gi = ACPI_GENERIC_INITIATOR(obj);
119 if (gi->node >= ms->numa_state->num_nodes) {
120 error_printf("%s: Specified node %d is invalid.\n",
121 TYPE_ACPI_GENERIC_INITIATOR, gi->node);
122 exit(1);
123 }
124
125 o = object_resolve_path_type(gi->pci_dev, TYPE_PCI_DEVICE, NULL);
126 if (!o) {
127 error_printf("%s: Specified device must be a PCI device.\n",
128 TYPE_ACPI_GENERIC_INITIATOR);
129 exit(1);
130 }
131
132 pci_dev = PCI_DEVICE(o);
133
134 dev_handle.segment = 0;
135 dev_handle.bdf = PCI_BUILD_BDF(pci_bus_num(pci_get_bus(pci_dev)),
136 pci_dev->devfn);
137
138 build_srat_generic_pci_initiator_affinity(table_data,
139 gi->node, &dev_handle);
140
141 return 0;
142 }
143
build_srat_generic_pci_initiator(GArray * table_data)144 void build_srat_generic_pci_initiator(GArray *table_data)
145 {
146 object_child_foreach_recursive(object_get_root(),
147 build_all_acpi_generic_initiators,
148 table_data);
149 }
150