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