1 /* 2 * Base class for PCI Express Root Ports 3 * 4 * Copyright (C) 2017 Red Hat Inc 5 * 6 * Authors: 7 * Marcel Apfelbaum <marcel@redhat.com> 8 * 9 * Most of the code was migrated from hw/pci-bridge/ioh3420. 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2 or later. 12 * See the COPYING file in the top-level directory. 13 */ 14 15 #include "qemu/osdep.h" 16 #include "qapi/error.h" 17 #include "qemu/module.h" 18 #include "hw/pci/pcie_port.h" 19 #include "hw/qdev-properties.h" 20 21 static void rp_aer_vector_update(PCIDevice *d) 22 { 23 PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d); 24 25 if (rpc->aer_vector) { 26 pcie_aer_root_set_vector(d, rpc->aer_vector(d)); 27 } 28 } 29 30 static void rp_write_config(PCIDevice *d, uint32_t address, 31 uint32_t val, int len) 32 { 33 uint32_t root_cmd = 34 pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND); 35 uint16_t slt_ctl, slt_sta; 36 37 pcie_cap_slot_get(d, &slt_ctl, &slt_sta); 38 39 pci_bridge_write_config(d, address, val, len); 40 rp_aer_vector_update(d); 41 pcie_cap_slot_write_config(d, slt_ctl, slt_sta, address, val, len); 42 pcie_aer_write_config(d, address, val, len); 43 pcie_aer_root_write_config(d, address, val, len, root_cmd); 44 } 45 46 static void rp_reset_hold(Object *obj, ResetType type) 47 { 48 PCIDevice *d = PCI_DEVICE(obj); 49 DeviceState *qdev = DEVICE(obj); 50 51 rp_aer_vector_update(d); 52 pcie_cap_root_reset(d); 53 pcie_cap_deverr_reset(d); 54 pcie_cap_slot_reset(d); 55 pcie_cap_arifwd_reset(d); 56 pcie_acs_reset(d); 57 pcie_aer_root_reset(d); 58 pci_bridge_reset(qdev); 59 pci_bridge_disable_base_limit(d); 60 } 61 62 static void rp_realize(PCIDevice *d, Error **errp) 63 { 64 PCIEPort *p = PCIE_PORT(d); 65 PCIESlot *s = PCIE_SLOT(d); 66 PCIDeviceClass *dc = PCI_DEVICE_GET_CLASS(d); 67 PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d); 68 int rc; 69 70 pci_config_set_interrupt_pin(d->config, 1); 71 if (d->cap_present & QEMU_PCIE_CAP_CXL) { 72 pci_bridge_initfn(d, TYPE_CXL_BUS); 73 } else { 74 pci_bridge_initfn(d, TYPE_PCIE_BUS); 75 } 76 pcie_port_init_reg(d); 77 78 rc = pci_bridge_ssvid_init(d, rpc->ssvid_offset, dc->vendor_id, 79 rpc->ssid, errp); 80 if (rc < 0) { 81 error_append_hint(errp, "Can't init SSV ID, error %d\n", rc); 82 goto err_bridge; 83 } 84 85 if (rpc->interrupts_init) { 86 rc = rpc->interrupts_init(d, errp); 87 if (rc < 0) { 88 goto err_bridge; 89 } 90 } 91 92 rc = pcie_cap_init(d, rpc->exp_offset, PCI_EXP_TYPE_ROOT_PORT, 93 p->port, errp); 94 if (rc < 0) { 95 error_append_hint(errp, "Can't add Root Port capability, " 96 "error %d\n", rc); 97 goto err_int; 98 } 99 100 pcie_cap_arifwd_init(d); 101 pcie_cap_deverr_init(d); 102 pcie_cap_slot_init(d, s); 103 pcie_cap_root_init(d); 104 105 pcie_chassis_create(s->chassis); 106 rc = pcie_chassis_add_slot(s); 107 if (rc < 0) { 108 error_setg(errp, "Can't add chassis slot, error %d", rc); 109 goto err_pcie_cap; 110 } 111 112 rc = pcie_aer_init(d, PCI_ERR_VER, rpc->aer_offset, 113 PCI_ERR_SIZEOF, errp); 114 if (rc < 0) { 115 goto err; 116 } 117 pcie_aer_root_init(d); 118 rp_aer_vector_update(d); 119 120 if (rpc->acs_offset && !s->disable_acs) { 121 pcie_acs_init(d, rpc->acs_offset); 122 } 123 return; 124 125 err: 126 pcie_chassis_del_slot(s); 127 err_pcie_cap: 128 pcie_cap_exit(d); 129 err_int: 130 if (rpc->interrupts_uninit) { 131 rpc->interrupts_uninit(d); 132 } 133 err_bridge: 134 pci_bridge_exitfn(d); 135 } 136 137 static void rp_exit(PCIDevice *d) 138 { 139 PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d); 140 PCIESlot *s = PCIE_SLOT(d); 141 142 pcie_aer_exit(d); 143 pcie_chassis_del_slot(s); 144 pcie_cap_exit(d); 145 if (rpc->interrupts_uninit) { 146 rpc->interrupts_uninit(d); 147 } 148 pci_bridge_exitfn(d); 149 } 150 151 static Property rp_props[] = { 152 DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present, 153 QEMU_PCIE_SLTCAP_PCP_BITNR, true), 154 DEFINE_PROP_BOOL("disable-acs", PCIESlot, disable_acs, false), 155 DEFINE_PROP_END_OF_LIST() 156 }; 157 158 static void rp_instance_post_init(Object *obj) 159 { 160 PCIESlot *s = PCIE_SLOT(obj); 161 162 if (!s->speed) { 163 s->speed = QEMU_PCI_EXP_LNK_2_5GT; 164 } 165 166 if (!s->width) { 167 s->width = QEMU_PCI_EXP_LNK_X1; 168 } 169 } 170 171 static void rp_class_init(ObjectClass *klass, void *data) 172 { 173 DeviceClass *dc = DEVICE_CLASS(klass); 174 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 175 ResettableClass *rc = RESETTABLE_CLASS(klass); 176 177 k->config_write = rp_write_config; 178 k->realize = rp_realize; 179 k->exit = rp_exit; 180 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 181 rc->phases.hold = rp_reset_hold; 182 device_class_set_props(dc, rp_props); 183 } 184 185 static const TypeInfo rp_info = { 186 .name = TYPE_PCIE_ROOT_PORT, 187 .parent = TYPE_PCIE_SLOT, 188 .instance_post_init = rp_instance_post_init, 189 .class_init = rp_class_init, 190 .abstract = true, 191 .class_size = sizeof(PCIERootPortClass), 192 .interfaces = (InterfaceInfo[]) { 193 { INTERFACE_PCIE_DEVICE }, 194 { } 195 }, 196 }; 197 198 static void rp_register_types(void) 199 { 200 type_register_static(&rp_info); 201 } 202 203 type_init(rp_register_types) 204