1 #include "qemu/osdep.h"
2 #include "hw/acpi/aml-build.h"
3 #include "hw/pci-host/gpex.h"
4 #include "hw/arm/virt.h"
5 #include "hw/pci/pci_bus.h"
6 #include "hw/pci/pci_bridge.h"
7 #include "hw/pci/pcie_host.h"
8 #include "hw/acpi/cxl.h"
9
acpi_dsdt_add_pci_route_table(Aml * dev,uint32_t irq,Aml * scope,uint8_t bus_num)10 static void acpi_dsdt_add_pci_route_table(Aml *dev, uint32_t irq,
11 Aml *scope, uint8_t bus_num)
12 {
13 Aml *method, *crs;
14 int i, slot_no;
15
16 /* Declare the PCI Routing Table. */
17 Aml *rt_pkg = aml_varpackage(PCI_SLOT_MAX * PCI_NUM_PINS);
18 for (slot_no = 0; slot_no < PCI_SLOT_MAX; slot_no++) {
19 for (i = 0; i < PCI_NUM_PINS; i++) {
20 int gsi = (i + slot_no) % PCI_NUM_PINS;
21 Aml *pkg = aml_package(4);
22 aml_append(pkg, aml_int((slot_no << 16) | 0xFFFF));
23 aml_append(pkg, aml_int(i));
24 aml_append(pkg, aml_name("L%.02X%X", bus_num, gsi));
25 aml_append(pkg, aml_int(0));
26 aml_append(rt_pkg, pkg);
27 }
28 }
29 aml_append(dev, aml_name_decl("_PRT", rt_pkg));
30
31 /* Create GSI link device */
32 for (i = 0; i < PCI_NUM_PINS; i++) {
33 uint32_t irqs = irq + i;
34 Aml *dev_gsi = aml_device("L%.02X%X", bus_num, i);
35 aml_append(dev_gsi, aml_name_decl("_HID", aml_string("PNP0C0F")));
36 aml_append(dev_gsi, aml_name_decl("_UID", aml_int(i)));
37 crs = aml_resource_template();
38 aml_append(crs,
39 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
40 AML_EXCLUSIVE, &irqs, 1));
41 aml_append(dev_gsi, aml_name_decl("_PRS", crs));
42 crs = aml_resource_template();
43 aml_append(crs,
44 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
45 AML_EXCLUSIVE, &irqs, 1));
46 aml_append(dev_gsi, aml_name_decl("_CRS", crs));
47 method = aml_method("_SRS", 1, AML_NOTSERIALIZED);
48 aml_append(dev_gsi, method);
49 aml_append(scope, dev_gsi);
50 }
51 }
52
acpi_dsdt_add_pci_osc(Aml * dev)53 static void acpi_dsdt_add_pci_osc(Aml *dev)
54 {
55 Aml *method, *UUID, *ifctx, *ifctx1, *elsectx, *buf;
56
57 /* Declare an _OSC (OS Control Handoff) method */
58 aml_append(dev, aml_name_decl("SUPP", aml_int(0)));
59 aml_append(dev, aml_name_decl("CTRL", aml_int(0)));
60 method = aml_method("_OSC", 4, AML_NOTSERIALIZED);
61 aml_append(method,
62 aml_create_dword_field(aml_arg(3), aml_int(0), "CDW1"));
63
64 /* PCI Firmware Specification 3.0
65 * 4.5.1. _OSC Interface for PCI Host Bridge Devices
66 * The _OSC interface for a PCI/PCI-X/PCI Express hierarchy is
67 * identified by the Universal Unique IDentifier (UUID)
68 * 33DB4D5B-1FF7-401C-9657-7441C03DD766
69 */
70 UUID = aml_touuid("33DB4D5B-1FF7-401C-9657-7441C03DD766");
71 ifctx = aml_if(aml_equal(aml_arg(0), UUID));
72 aml_append(ifctx,
73 aml_create_dword_field(aml_arg(3), aml_int(4), "CDW2"));
74 aml_append(ifctx,
75 aml_create_dword_field(aml_arg(3), aml_int(8), "CDW3"));
76 aml_append(ifctx, aml_store(aml_name("CDW2"), aml_name("SUPP")));
77 aml_append(ifctx, aml_store(aml_name("CDW3"), aml_name("CTRL")));
78
79 /*
80 * Allow OS control for all 5 features:
81 * PCIeHotplug SHPCHotplug PME AER PCIeCapability.
82 */
83 aml_append(ifctx, aml_and(aml_name("CTRL"), aml_int(0x1F),
84 aml_name("CTRL")));
85
86 ifctx1 = aml_if(aml_lnot(aml_equal(aml_arg(1), aml_int(0x1))));
87 aml_append(ifctx1, aml_or(aml_name("CDW1"), aml_int(0x08),
88 aml_name("CDW1")));
89 aml_append(ifctx, ifctx1);
90
91 ifctx1 = aml_if(aml_lnot(aml_equal(aml_name("CDW3"), aml_name("CTRL"))));
92 aml_append(ifctx1, aml_or(aml_name("CDW1"), aml_int(0x10),
93 aml_name("CDW1")));
94 aml_append(ifctx, ifctx1);
95
96 aml_append(ifctx, aml_store(aml_name("CTRL"), aml_name("CDW3")));
97 aml_append(ifctx, aml_return(aml_arg(3)));
98 aml_append(method, ifctx);
99
100 elsectx = aml_else();
101 aml_append(elsectx, aml_or(aml_name("CDW1"), aml_int(4),
102 aml_name("CDW1")));
103 aml_append(elsectx, aml_return(aml_arg(3)));
104 aml_append(method, elsectx);
105 aml_append(dev, method);
106
107 method = aml_method("_DSM", 4, AML_NOTSERIALIZED);
108
109 /* PCI Firmware Specification 3.0
110 * 4.6.1. _DSM for PCI Express Slot Information
111 * The UUID in _DSM in this context is
112 * {E5C937D0-3553-4D7A-9117-EA4D19C3434D}
113 */
114 UUID = aml_touuid("E5C937D0-3553-4D7A-9117-EA4D19C3434D");
115 ifctx = aml_if(aml_equal(aml_arg(0), UUID));
116 ifctx1 = aml_if(aml_equal(aml_arg(2), aml_int(0)));
117 uint8_t byte_list[1] = {1};
118 buf = aml_buffer(1, byte_list);
119 aml_append(ifctx1, aml_return(buf));
120 aml_append(ifctx, ifctx1);
121 aml_append(method, ifctx);
122
123 byte_list[0] = 0;
124 buf = aml_buffer(1, byte_list);
125 aml_append(method, aml_return(buf));
126 aml_append(dev, method);
127 }
128
acpi_dsdt_add_gpex(Aml * scope,struct GPEXConfig * cfg)129 void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
130 {
131 int nr_pcie_buses = cfg->ecam.size / PCIE_MMCFG_SIZE_MIN;
132 Aml *method, *crs, *dev, *rbuf;
133 PCIBus *bus = cfg->bus;
134 CrsRangeSet crs_range_set;
135 CrsRangeEntry *entry;
136 int i;
137
138 /* start to construct the tables for pxb */
139 crs_range_set_init(&crs_range_set);
140 if (bus) {
141 QLIST_FOREACH(bus, &bus->child, sibling) {
142 uint8_t bus_num = pci_bus_num(bus);
143 uint8_t numa_node = pci_bus_numa_node(bus);
144 bool is_cxl = pci_bus_is_cxl(bus);
145
146 if (!pci_bus_is_root(bus)) {
147 continue;
148 }
149
150 /*
151 * 0 - (nr_pcie_buses - 1) is the bus range for the main
152 * host-bridge and it equals the MIN of the
153 * busNr defined for pxb-pcie.
154 */
155 if (bus_num < nr_pcie_buses) {
156 nr_pcie_buses = bus_num;
157 }
158
159 dev = aml_device("PC%.02X", bus_num);
160 if (is_cxl) {
161 struct Aml *pkg = aml_package(2);
162 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0016")));
163 aml_append(pkg, aml_eisaid("PNP0A08"));
164 aml_append(pkg, aml_eisaid("PNP0A03"));
165 aml_append(dev, aml_name_decl("_CID", pkg));
166 } else {
167 aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
168 aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
169 }
170 aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
171 aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
172 aml_append(dev, aml_name_decl("_STR", aml_unicode("pxb Device")));
173 aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
174 if (numa_node != NUMA_NODE_UNASSIGNED) {
175 aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
176 }
177
178 acpi_dsdt_add_pci_route_table(dev, cfg->irq, scope, bus_num);
179
180 /*
181 * Resources defined for PXBs are composed of the following parts:
182 * 1. The resources the pci-brige/pcie-root-port need.
183 * 2. The resources the devices behind pxb need.
184 */
185 crs = build_crs(PCI_HOST_BRIDGE(BUS(bus)->parent), &crs_range_set,
186 cfg->pio.base, 0, 0, 0);
187 aml_append(dev, aml_name_decl("_CRS", crs));
188
189 if (is_cxl) {
190 build_cxl_osc_method(dev);
191 } else {
192 acpi_dsdt_add_pci_osc(dev);
193 }
194
195 aml_append(scope, dev);
196 }
197 }
198
199 /* tables for the main */
200 dev = aml_device("%s", "PCI0");
201 aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A08")));
202 aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
203 aml_append(dev, aml_name_decl("_SEG", aml_int(0)));
204 aml_append(dev, aml_name_decl("_BBN", aml_int(0)));
205 aml_append(dev, aml_name_decl("_UID", aml_int(0)));
206 aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device")));
207 aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
208
209 acpi_dsdt_add_pci_route_table(dev, cfg->irq, scope, 0);
210
211 method = aml_method("_CBA", 0, AML_NOTSERIALIZED);
212 aml_append(method, aml_return(aml_int(cfg->ecam.base)));
213 aml_append(dev, method);
214
215 /*
216 * At this point crs_range_set has all the ranges used by pci
217 * busses *other* than PCI0. These ranges will be excluded from
218 * the PCI0._CRS.
219 */
220 rbuf = aml_resource_template();
221 aml_append(rbuf,
222 aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
223 0x0000, 0x0000, nr_pcie_buses - 1, 0x0000,
224 nr_pcie_buses));
225 if (cfg->mmio32.size) {
226 crs_replace_with_free_ranges(crs_range_set.mem_ranges,
227 cfg->mmio32.base,
228 cfg->mmio32.base + cfg->mmio32.size - 1);
229 for (i = 0; i < crs_range_set.mem_ranges->len; i++) {
230 entry = g_ptr_array_index(crs_range_set.mem_ranges, i);
231 aml_append(rbuf,
232 aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
233 AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
234 entry->base, entry->limit,
235 0x0000, entry->limit - entry->base + 1));
236 }
237 }
238 if (cfg->pio.size) {
239 crs_replace_with_free_ranges(crs_range_set.io_ranges,
240 0x0000,
241 cfg->pio.size - 1);
242 for (i = 0; i < crs_range_set.io_ranges->len; i++) {
243 entry = g_ptr_array_index(crs_range_set.io_ranges, i);
244 aml_append(rbuf,
245 aml_dword_io(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
246 AML_ENTIRE_RANGE, 0x0000, entry->base,
247 entry->limit, cfg->pio.base,
248 entry->limit - entry->base + 1));
249 }
250 }
251 if (cfg->mmio64.size) {
252 crs_replace_with_free_ranges(crs_range_set.mem_64bit_ranges,
253 cfg->mmio64.base,
254 cfg->mmio64.base + cfg->mmio64.size - 1);
255 for (i = 0; i < crs_range_set.mem_64bit_ranges->len; i++) {
256 entry = g_ptr_array_index(crs_range_set.mem_64bit_ranges, i);
257 aml_append(rbuf,
258 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
259 AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
260 entry->base,
261 entry->limit, 0x0000,
262 entry->limit - entry->base + 1));
263 }
264 }
265 aml_append(dev, aml_name_decl("_CRS", rbuf));
266
267 acpi_dsdt_add_pci_osc(dev);
268
269 Aml *dev_res0 = aml_device("%s", "RES0");
270 aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
271 crs = aml_resource_template();
272 aml_append(crs,
273 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
274 AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
275 cfg->ecam.base,
276 cfg->ecam.base + cfg->ecam.size - 1,
277 0x0000,
278 cfg->ecam.size));
279 aml_append(dev_res0, aml_name_decl("_CRS", crs));
280 aml_append(dev, dev_res0);
281 aml_append(scope, dev);
282
283 crs_range_set_free(&crs_range_set);
284 }
285
acpi_dsdt_add_gpex_host(Aml * scope,uint32_t irq)286 void acpi_dsdt_add_gpex_host(Aml *scope, uint32_t irq)
287 {
288 bool ambig;
289 Object *obj = object_resolve_path_type("", TYPE_GPEX_HOST, &ambig);
290
291 if (!obj || ambig) {
292 return;
293 }
294
295 GPEX_HOST(obj)->gpex_cfg.irq = irq;
296 acpi_dsdt_add_gpex(scope, &GPEX_HOST(obj)->gpex_cfg);
297 }
298