1db4728e6SMichael S. Tsirkin /* 2db4728e6SMichael S. Tsirkin * QEMU<->ACPI BIOS PCI hotplug interface 3db4728e6SMichael S. Tsirkin * 4db4728e6SMichael S. Tsirkin * QEMU supports PCI hotplug via ACPI. This module 5db4728e6SMichael S. Tsirkin * implements the interface between QEMU and the ACPI BIOS. 6db4728e6SMichael S. Tsirkin * Interface specification - see docs/specs/acpi_pci_hotplug.txt 7db4728e6SMichael S. Tsirkin * 8db4728e6SMichael S. Tsirkin * Copyright (c) 2013, Red Hat Inc, Michael S. Tsirkin (mst@redhat.com) 9db4728e6SMichael S. Tsirkin * Copyright (c) 2006 Fabrice Bellard 10db4728e6SMichael S. Tsirkin * 11db4728e6SMichael S. Tsirkin * This library is free software; you can redistribute it and/or 12db4728e6SMichael S. Tsirkin * modify it under the terms of the GNU Lesser General Public 1361f3c91aSChetan Pant * License version 2.1 as published by the Free Software Foundation. 14db4728e6SMichael S. Tsirkin * 15db4728e6SMichael S. Tsirkin * This library is distributed in the hope that it will be useful, 16db4728e6SMichael S. Tsirkin * but WITHOUT ANY WARRANTY; without even the implied warranty of 17db4728e6SMichael S. Tsirkin * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18db4728e6SMichael S. Tsirkin * Lesser General Public License for more details. 19db4728e6SMichael S. Tsirkin * 20db4728e6SMichael S. Tsirkin * You should have received a copy of the GNU Lesser General Public 21db4728e6SMichael S. Tsirkin * License along with this library; if not, see <http://www.gnu.org/licenses/> 22db4728e6SMichael S. Tsirkin * 23db4728e6SMichael S. Tsirkin * Contributions after 2012-01-13 are licensed under the terms of the 24db4728e6SMichael S. Tsirkin * GNU GPL, version 2 or (at your option) any later version. 25db4728e6SMichael S. Tsirkin */ 26db4728e6SMichael S. Tsirkin 27b6a0aa05SPeter Maydell #include "qemu/osdep.h" 28db4728e6SMichael S. Tsirkin #include "hw/acpi/pcihp.h" 29db4728e6SMichael S. Tsirkin 300fd61a2dSPhilippe Mathieu-Daudé #include "hw/pci-host/i440fx.h" 31db4728e6SMichael S. Tsirkin #include "hw/pci/pci.h" 323e520926SDavid Hildenbrand #include "hw/pci/pci_bridge.h" 33c0e427d6SJulia Suvorova #include "hw/pci/pci_host.h" 343f3cbbb2SJulia Suvorova #include "hw/pci/pcie_port.h" 35c0e427d6SJulia Suvorova #include "hw/i386/acpi-build.h" 36db4728e6SMichael S. Tsirkin #include "hw/acpi/acpi.h" 37db4728e6SMichael S. Tsirkin #include "hw/pci/pci_bus.h" 38d6454270SMarkus Armbruster #include "migration/vmstate.h" 39da34e65cSMarkus Armbruster #include "qapi/error.h" 40db4728e6SMichael S. Tsirkin #include "qom/qom-qobject.h" 41df93b194SMarkus Armbruster #include "trace.h" 42db4728e6SMichael S. Tsirkin 43b32bd763SIgor Mammedov #define ACPI_PCIHP_SIZE 0x0018 44a7b613cfSIgor Mammedov #define PCI_UP_BASE 0x0000 45a7b613cfSIgor Mammedov #define PCI_DOWN_BASE 0x0004 46a7b613cfSIgor Mammedov #define PCI_EJ_BASE 0x0008 47a7b613cfSIgor Mammedov #define PCI_RMV_BASE 0x000c 48a7b613cfSIgor Mammedov #define PCI_SEL_BASE 0x0010 49b32bd763SIgor Mammedov #define PCI_AIDX_BASE 0x0014 50db4728e6SMichael S. Tsirkin 51db4728e6SMichael S. Tsirkin typedef struct AcpiPciHpFind { 52db4728e6SMichael S. Tsirkin int bsel; 53db4728e6SMichael S. Tsirkin PCIBus *bus; 54db4728e6SMichael S. Tsirkin } AcpiPciHpFind; 55db4728e6SMichael S. Tsirkin 564fd7da4cSIgor Mammedov static gint g_cmp_uint32(gconstpointer a, gconstpointer b, gpointer user_data) 574fd7da4cSIgor Mammedov { 584fd7da4cSIgor Mammedov return a - b; 594fd7da4cSIgor Mammedov } 604fd7da4cSIgor Mammedov 614fd7da4cSIgor Mammedov static GSequence *pci_acpi_index_list(void) 624fd7da4cSIgor Mammedov { 634fd7da4cSIgor Mammedov static GSequence *used_acpi_index_list; 644fd7da4cSIgor Mammedov 654fd7da4cSIgor Mammedov if (!used_acpi_index_list) { 664fd7da4cSIgor Mammedov used_acpi_index_list = g_sequence_new(NULL); 674fd7da4cSIgor Mammedov } 684fd7da4cSIgor Mammedov return used_acpi_index_list; 694fd7da4cSIgor Mammedov } 704fd7da4cSIgor Mammedov 71db4728e6SMichael S. Tsirkin static int acpi_pcihp_get_bsel(PCIBus *bus) 72db4728e6SMichael S. Tsirkin { 737c38ecd0SKirill Batuzov Error *local_err = NULL; 74c03d83d5SMarc-André Lureau uint64_t bsel = object_property_get_uint(OBJECT(bus), ACPI_PCIHP_PROP_BSEL, 757c38ecd0SKirill Batuzov &local_err); 767c38ecd0SKirill Batuzov 77c03d83d5SMarc-André Lureau if (local_err || bsel >= ACPI_PCIHP_MAX_HOTPLUG_BUS) { 787c38ecd0SKirill Batuzov if (local_err) { 797c38ecd0SKirill Batuzov error_free(local_err); 80db4728e6SMichael S. Tsirkin } 81db4728e6SMichael S. Tsirkin return -1; 827c38ecd0SKirill Batuzov } else { 83db4728e6SMichael S. Tsirkin return bsel; 84db4728e6SMichael S. Tsirkin } 857c38ecd0SKirill Batuzov } 86db4728e6SMichael S. Tsirkin 87ab938ae4SAnthony PERARD /* Assign BSEL property to all buses. In the future, this can be changed 88ab938ae4SAnthony PERARD * to only assign to buses that support hotplug. 89ab938ae4SAnthony PERARD */ 90ab938ae4SAnthony PERARD static void *acpi_set_bsel(PCIBus *bus, void *opaque) 91ab938ae4SAnthony PERARD { 92ab938ae4SAnthony PERARD unsigned *bsel_alloc = opaque; 93ab938ae4SAnthony PERARD unsigned *bus_bsel; 94ab938ae4SAnthony PERARD 95ab938ae4SAnthony PERARD if (qbus_is_hotpluggable(BUS(bus))) { 96ab938ae4SAnthony PERARD bus_bsel = g_malloc(sizeof *bus_bsel); 97ab938ae4SAnthony PERARD 98ab938ae4SAnthony PERARD *bus_bsel = (*bsel_alloc)++; 99ab938ae4SAnthony PERARD object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL, 100d2623129SMarkus Armbruster bus_bsel, OBJ_PROP_FLAG_READ); 101ab938ae4SAnthony PERARD } 102ab938ae4SAnthony PERARD 103ab938ae4SAnthony PERARD return bsel_alloc; 104ab938ae4SAnthony PERARD } 105ab938ae4SAnthony PERARD 106ab938ae4SAnthony PERARD static void acpi_set_pci_info(void) 107ab938ae4SAnthony PERARD { 108ab938ae4SAnthony PERARD static bool bsel_is_set; 109c0e427d6SJulia Suvorova Object *host = acpi_get_i386_pci_host(); 110ab938ae4SAnthony PERARD PCIBus *bus; 111ab938ae4SAnthony PERARD unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT; 112ab938ae4SAnthony PERARD 113ab938ae4SAnthony PERARD if (bsel_is_set) { 114ab938ae4SAnthony PERARD return; 115ab938ae4SAnthony PERARD } 116ab938ae4SAnthony PERARD bsel_is_set = true; 117ab938ae4SAnthony PERARD 118c0e427d6SJulia Suvorova if (!host) { 119c0e427d6SJulia Suvorova return; 120c0e427d6SJulia Suvorova } 121c0e427d6SJulia Suvorova 122c0e427d6SJulia Suvorova bus = PCI_HOST_BRIDGE(host)->bus; 123ab938ae4SAnthony PERARD if (bus) { 124ab938ae4SAnthony PERARD /* Scan all PCI buses. Set property to enable acpi based hotplug. */ 125ab938ae4SAnthony PERARD pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc); 126ab938ae4SAnthony PERARD } 127ab938ae4SAnthony PERARD } 128ab938ae4SAnthony PERARD 1293d7e78aaSAni Sinha static void acpi_pcihp_disable_root_bus(void) 1303d7e78aaSAni Sinha { 131c0e427d6SJulia Suvorova Object *host = acpi_get_i386_pci_host(); 1323d7e78aaSAni Sinha PCIBus *bus; 1333d7e78aaSAni Sinha 134c0e427d6SJulia Suvorova bus = PCI_HOST_BRIDGE(host)->bus; 135*78480268SAni Sinha if (bus && qbus_is_hotpluggable(BUS(bus))) { 1363d7e78aaSAni Sinha /* setting the hotplug handler to NULL makes the bus non-hotpluggable */ 1373d7e78aaSAni Sinha qbus_set_hotplug_handler(BUS(bus), NULL); 1383d7e78aaSAni Sinha } 139*78480268SAni Sinha 1403d7e78aaSAni Sinha return; 1413d7e78aaSAni Sinha } 1423d7e78aaSAni Sinha 143db4728e6SMichael S. Tsirkin static void acpi_pcihp_test_hotplug_bus(PCIBus *bus, void *opaque) 144db4728e6SMichael S. Tsirkin { 145db4728e6SMichael S. Tsirkin AcpiPciHpFind *find = opaque; 146db4728e6SMichael S. Tsirkin if (find->bsel == acpi_pcihp_get_bsel(bus)) { 147db4728e6SMichael S. Tsirkin find->bus = bus; 148db4728e6SMichael S. Tsirkin } 149db4728e6SMichael S. Tsirkin } 150db4728e6SMichael S. Tsirkin 151db4728e6SMichael S. Tsirkin static PCIBus *acpi_pcihp_find_hotplug_bus(AcpiPciHpState *s, int bsel) 152db4728e6SMichael S. Tsirkin { 153db4728e6SMichael S. Tsirkin AcpiPciHpFind find = { .bsel = bsel, .bus = NULL }; 154db4728e6SMichael S. Tsirkin 155db4728e6SMichael S. Tsirkin if (bsel < 0) { 156db4728e6SMichael S. Tsirkin return NULL; 157db4728e6SMichael S. Tsirkin } 158db4728e6SMichael S. Tsirkin 159db4728e6SMichael S. Tsirkin pci_for_each_bus(s->root, acpi_pcihp_test_hotplug_bus, &find); 160db4728e6SMichael S. Tsirkin 161db4728e6SMichael S. Tsirkin /* Make bsel 0 eject root bus if bsel property is not set, 162db4728e6SMichael S. Tsirkin * for compatibility with non acpi setups. 163db4728e6SMichael S. Tsirkin * TODO: really needed? 164db4728e6SMichael S. Tsirkin */ 165db4728e6SMichael S. Tsirkin if (!bsel && !find.bus) { 166db4728e6SMichael S. Tsirkin find.bus = s->root; 167db4728e6SMichael S. Tsirkin } 1688ad038abSAni Sinha 1698ad038abSAni Sinha /* 1708ad038abSAni Sinha * Check if find.bus is actually hotpluggable. If bsel is set to 1718ad038abSAni Sinha * NULL for example on the root bus in order to make it 1728ad038abSAni Sinha * non-hotpluggable, find.bus will match the root bus when bsel 1738ad038abSAni Sinha * is 0. See acpi_pcihp_test_hotplug_bus() above. Since the 1748ad038abSAni Sinha * bus is not hotpluggable however, we should not select the bus. 1758ad038abSAni Sinha * Instead, we should set find.bus to NULL in that case. In the check 1768ad038abSAni Sinha * below, we generalize this case for all buses, not just the root bus. 1778ad038abSAni Sinha * The callers of this function check for a null return value and 1788ad038abSAni Sinha * handle them appropriately. 1798ad038abSAni Sinha */ 1808ad038abSAni Sinha if (find.bus && !qbus_is_hotpluggable(BUS(find.bus))) { 1818ad038abSAni Sinha find.bus = NULL; 1828ad038abSAni Sinha } 183db4728e6SMichael S. Tsirkin return find.bus; 184db4728e6SMichael S. Tsirkin } 185db4728e6SMichael S. Tsirkin 186db4728e6SMichael S. Tsirkin static bool acpi_pcihp_pc_no_hotplug(AcpiPciHpState *s, PCIDevice *dev) 187db4728e6SMichael S. Tsirkin { 188db4728e6SMichael S. Tsirkin PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 1892897ae02SIgor Mammedov DeviceClass *dc = DEVICE_GET_CLASS(dev); 190db4728e6SMichael S. Tsirkin /* 191db4728e6SMichael S. Tsirkin * ACPI doesn't allow hotplug of bridge devices. Don't allow 192db4728e6SMichael S. Tsirkin * hot-unplug of bridge devices unless they were added by hotplug 193db4728e6SMichael S. Tsirkin * (and so, not described by acpi). 194db4728e6SMichael S. Tsirkin */ 1952897ae02SIgor Mammedov return (pc->is_bridge && !dev->qdev.hotplugged) || !dc->hotpluggable; 196db4728e6SMichael S. Tsirkin } 197db4728e6SMichael S. Tsirkin 198db4728e6SMichael S. Tsirkin static void acpi_pcihp_eject_slot(AcpiPciHpState *s, unsigned bsel, unsigned slots) 199db4728e6SMichael S. Tsirkin { 200c97adf3cSDavid Hildenbrand HotplugHandler *hotplug_ctrl; 201db4728e6SMichael S. Tsirkin BusChild *kid, *next; 202786a4ea8SStefan Hajnoczi int slot = ctz32(slots); 203db4728e6SMichael S. Tsirkin PCIBus *bus = acpi_pcihp_find_hotplug_bus(s, bsel); 204db4728e6SMichael S. Tsirkin 20503459ea3SMarkus Armbruster trace_acpi_pci_eject_slot(bsel, slot); 20603459ea3SMarkus Armbruster 207a3ec4bb7SIgor Mammedov if (!bus || slot > 31) { 208db4728e6SMichael S. Tsirkin return; 209db4728e6SMichael S. Tsirkin } 210db4728e6SMichael S. Tsirkin 211db4728e6SMichael S. Tsirkin /* Mark request as complete */ 212db4728e6SMichael S. Tsirkin s->acpi_pcihp_pci_status[bsel].down &= ~(1U << slot); 2135a2223caSMichael S. Tsirkin s->acpi_pcihp_pci_status[bsel].up &= ~(1U << slot); 214db4728e6SMichael S. Tsirkin 215db4728e6SMichael S. Tsirkin QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) { 216db4728e6SMichael S. Tsirkin DeviceState *qdev = kid->child; 217db4728e6SMichael S. Tsirkin PCIDevice *dev = PCI_DEVICE(qdev); 218db4728e6SMichael S. Tsirkin if (PCI_SLOT(dev->devfn) == slot) { 2195a2223caSMichael S. Tsirkin if (!acpi_pcihp_pc_no_hotplug(s, dev)) { 2209323f892SLaurent Vivier /* 2219323f892SLaurent Vivier * partially_hotplugged is used by virtio-net failover: 2229323f892SLaurent Vivier * failover has asked the guest OS to unplug the device 2239323f892SLaurent Vivier * but we need to keep some references to the device 2249323f892SLaurent Vivier * to be able to plug it back in case of failure so 2259323f892SLaurent Vivier * we don't execute hotplug_handler_unplug(). 2269323f892SLaurent Vivier */ 2279323f892SLaurent Vivier if (dev->partially_hotplugged) { 2289323f892SLaurent Vivier /* 2299323f892SLaurent Vivier * pending_deleted_event is set to true when 2309323f892SLaurent Vivier * virtio-net failover asks to unplug the device, 2319323f892SLaurent Vivier * and set to false here when the operation is done 2329323f892SLaurent Vivier * This is used by the migration loop to detect the 2339323f892SLaurent Vivier * end of the operation and really start the migration. 2349323f892SLaurent Vivier */ 2359323f892SLaurent Vivier qdev->pending_deleted_event = false; 2369323f892SLaurent Vivier } else { 237c97adf3cSDavid Hildenbrand hotplug_ctrl = qdev_get_hotplug_handler(qdev); 238c97adf3cSDavid Hildenbrand hotplug_handler_unplug(hotplug_ctrl, qdev, &error_abort); 23907578b0aSDavid Hildenbrand object_unparent(OBJECT(qdev)); 240db4728e6SMichael S. Tsirkin } 241db4728e6SMichael S. Tsirkin } 242db4728e6SMichael S. Tsirkin } 243db4728e6SMichael S. Tsirkin } 2449323f892SLaurent Vivier } 245db4728e6SMichael S. Tsirkin 246db4728e6SMichael S. Tsirkin static void acpi_pcihp_update_hotplug_bus(AcpiPciHpState *s, int bsel) 247db4728e6SMichael S. Tsirkin { 248db4728e6SMichael S. Tsirkin BusChild *kid, *next; 249db4728e6SMichael S. Tsirkin PCIBus *bus = acpi_pcihp_find_hotplug_bus(s, bsel); 250db4728e6SMichael S. Tsirkin 251db4728e6SMichael S. Tsirkin /* Execute any pending removes during reset */ 252db4728e6SMichael S. Tsirkin while (s->acpi_pcihp_pci_status[bsel].down) { 253db4728e6SMichael S. Tsirkin acpi_pcihp_eject_slot(s, bsel, s->acpi_pcihp_pci_status[bsel].down); 254db4728e6SMichael S. Tsirkin } 255db4728e6SMichael S. Tsirkin 256db4728e6SMichael S. Tsirkin s->acpi_pcihp_pci_status[bsel].hotplug_enable = ~0; 257db4728e6SMichael S. Tsirkin 258db4728e6SMichael S. Tsirkin if (!bus) { 259db4728e6SMichael S. Tsirkin return; 260db4728e6SMichael S. Tsirkin } 261db4728e6SMichael S. Tsirkin QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) { 262db4728e6SMichael S. Tsirkin DeviceState *qdev = kid->child; 263db4728e6SMichael S. Tsirkin PCIDevice *pdev = PCI_DEVICE(qdev); 264db4728e6SMichael S. Tsirkin int slot = PCI_SLOT(pdev->devfn); 265db4728e6SMichael S. Tsirkin 266db4728e6SMichael S. Tsirkin if (acpi_pcihp_pc_no_hotplug(s, pdev)) { 267db4728e6SMichael S. Tsirkin s->acpi_pcihp_pci_status[bsel].hotplug_enable &= ~(1U << slot); 268db4728e6SMichael S. Tsirkin } 269db4728e6SMichael S. Tsirkin } 270db4728e6SMichael S. Tsirkin } 271db4728e6SMichael S. Tsirkin 272db4728e6SMichael S. Tsirkin static void acpi_pcihp_update(AcpiPciHpState *s) 273db4728e6SMichael S. Tsirkin { 274db4728e6SMichael S. Tsirkin int i; 275db4728e6SMichael S. Tsirkin 276db4728e6SMichael S. Tsirkin for (i = 0; i < ACPI_PCIHP_MAX_HOTPLUG_BUS; ++i) { 277db4728e6SMichael S. Tsirkin acpi_pcihp_update_hotplug_bus(s, i); 278db4728e6SMichael S. Tsirkin } 279db4728e6SMichael S. Tsirkin } 280db4728e6SMichael S. Tsirkin 2813d7e78aaSAni Sinha void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off) 282db4728e6SMichael S. Tsirkin { 2833d7e78aaSAni Sinha if (acpihp_root_off) { 2843d7e78aaSAni Sinha acpi_pcihp_disable_root_bus(); 2853d7e78aaSAni Sinha } 286ab938ae4SAnthony PERARD acpi_set_pci_info(); 287db4728e6SMichael S. Tsirkin acpi_pcihp_update(s); 288db4728e6SMichael S. Tsirkin } 289db4728e6SMichael S. Tsirkin 290b32bd763SIgor Mammedov #define ONBOARD_INDEX_MAX (16 * 1024 - 1) 291b32bd763SIgor Mammedov 292ec266f40SDavid Hildenbrand void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev, 293ec266f40SDavid Hildenbrand DeviceState *dev, Error **errp) 294ec266f40SDavid Hildenbrand { 295b32bd763SIgor Mammedov PCIDevice *pdev = PCI_DEVICE(dev); 296b32bd763SIgor Mammedov 297ec266f40SDavid Hildenbrand /* Only hotplugged devices need the hotplug capability. */ 298ec266f40SDavid Hildenbrand if (dev->hotplugged && 299028f1a88SAni Sinha acpi_pcihp_get_bsel(pci_get_bus(pdev)) < 0) { 300ec266f40SDavid Hildenbrand error_setg(errp, "Unsupported bus. Bus doesn't have property '" 301ec266f40SDavid Hildenbrand ACPI_PCIHP_PROP_BSEL "' set"); 302ec266f40SDavid Hildenbrand return; 303ec266f40SDavid Hildenbrand } 304b32bd763SIgor Mammedov 305b32bd763SIgor Mammedov /* 306b32bd763SIgor Mammedov * capped by systemd (see: udev-builtin-net_id.c) 307b32bd763SIgor Mammedov * as it's the only known user honor it to avoid users 308b32bd763SIgor Mammedov * misconfigure QEMU and then wonder why acpi-index doesn't work 309b32bd763SIgor Mammedov */ 310b32bd763SIgor Mammedov if (pdev->acpi_index > ONBOARD_INDEX_MAX) { 311b32bd763SIgor Mammedov error_setg(errp, "acpi-index should be less or equal to %u", 312b32bd763SIgor Mammedov ONBOARD_INDEX_MAX); 313b32bd763SIgor Mammedov return; 314b32bd763SIgor Mammedov } 3154fd7da4cSIgor Mammedov 3164fd7da4cSIgor Mammedov /* 3174fd7da4cSIgor Mammedov * make sure that acpi-index is unique across all present PCI devices 3184fd7da4cSIgor Mammedov */ 3194fd7da4cSIgor Mammedov if (pdev->acpi_index) { 3204fd7da4cSIgor Mammedov GSequence *used_indexes = pci_acpi_index_list(); 3214fd7da4cSIgor Mammedov 3224fd7da4cSIgor Mammedov if (g_sequence_lookup(used_indexes, GINT_TO_POINTER(pdev->acpi_index), 3234fd7da4cSIgor Mammedov g_cmp_uint32, NULL)) { 3244fd7da4cSIgor Mammedov error_setg(errp, "a PCI device with acpi-index = %" PRIu32 3254fd7da4cSIgor Mammedov " already exist", pdev->acpi_index); 3264fd7da4cSIgor Mammedov return; 3274fd7da4cSIgor Mammedov } 3284fd7da4cSIgor Mammedov g_sequence_insert_sorted(used_indexes, 3294fd7da4cSIgor Mammedov GINT_TO_POINTER(pdev->acpi_index), 3304fd7da4cSIgor Mammedov g_cmp_uint32, NULL); 3314fd7da4cSIgor Mammedov } 332ec266f40SDavid Hildenbrand } 333ec266f40SDavid Hildenbrand 3340058c082SIgor Mammedov void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, 335c24d5e0bSIgor Mammedov DeviceState *dev, Error **errp) 336db4728e6SMichael S. Tsirkin { 337c24d5e0bSIgor Mammedov PCIDevice *pdev = PCI_DEVICE(dev); 338c24d5e0bSIgor Mammedov int slot = PCI_SLOT(pdev->devfn); 339ec266f40SDavid Hildenbrand int bsel; 340db4728e6SMichael S. Tsirkin 341db4728e6SMichael S. Tsirkin /* Don't send event when device is enabled during qemu machine creation: 342db4728e6SMichael S. Tsirkin * it is present on boot, no hotplug event is necessary. We do send an 343db4728e6SMichael S. Tsirkin * event when the device is disabled later. */ 344c24d5e0bSIgor Mammedov if (!dev->hotplugged) { 3453e520926SDavid Hildenbrand /* 3463e520926SDavid Hildenbrand * Overwrite the default hotplug handler with the ACPI PCI one 3473e520926SDavid Hildenbrand * for cold plugged bridges only. 3483e520926SDavid Hildenbrand */ 3493e520926SDavid Hildenbrand if (!s->legacy_piix && 3503e520926SDavid Hildenbrand object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 3513e520926SDavid Hildenbrand PCIBus *sec = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); 3523e520926SDavid Hildenbrand 3533f3cbbb2SJulia Suvorova /* Remove all hot-plug handlers if hot-plug is disabled on slot */ 3543f3cbbb2SJulia Suvorova if (object_dynamic_cast(OBJECT(dev), TYPE_PCIE_SLOT) && 3553f3cbbb2SJulia Suvorova !PCIE_SLOT(pdev)->hotplug) { 3563f3cbbb2SJulia Suvorova qbus_set_hotplug_handler(BUS(sec), NULL); 3573f3cbbb2SJulia Suvorova return; 3583f3cbbb2SJulia Suvorova } 3593f3cbbb2SJulia Suvorova 3609bc6bfdfSMarkus Armbruster qbus_set_hotplug_handler(BUS(sec), OBJECT(hotplug_dev)); 3613e520926SDavid Hildenbrand /* We don't have to overwrite any other hotplug handler yet */ 3623e520926SDavid Hildenbrand assert(QLIST_EMPTY(&sec->child)); 3633e520926SDavid Hildenbrand } 3643e520926SDavid Hildenbrand 365c24d5e0bSIgor Mammedov return; 366db4728e6SMichael S. Tsirkin } 367db4728e6SMichael S. Tsirkin 368ec266f40SDavid Hildenbrand bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev)); 369ec266f40SDavid Hildenbrand g_assert(bsel >= 0); 3708f5001f9SIgor Mammedov s->acpi_pcihp_pci_status[bsel].up |= (1U << slot); 3710058c082SIgor Mammedov acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS); 372db4728e6SMichael S. Tsirkin } 373db4728e6SMichael S. Tsirkin 3740058c082SIgor Mammedov void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, 375c24d5e0bSIgor Mammedov DeviceState *dev, Error **errp) 376c24d5e0bSIgor Mammedov { 3774fd7da4cSIgor Mammedov PCIDevice *pdev = PCI_DEVICE(dev); 3784fd7da4cSIgor Mammedov 379028f1a88SAni Sinha trace_acpi_pci_unplug(PCI_SLOT(pdev->devfn), 380028f1a88SAni Sinha acpi_pcihp_get_bsel(pci_get_bus(pdev))); 3814fd7da4cSIgor Mammedov 3824fd7da4cSIgor Mammedov /* 3834fd7da4cSIgor Mammedov * clean up acpi-index so it could reused by another device 3844fd7da4cSIgor Mammedov */ 3854fd7da4cSIgor Mammedov if (pdev->acpi_index) { 3864fd7da4cSIgor Mammedov GSequence *used_indexes = pci_acpi_index_list(); 3874fd7da4cSIgor Mammedov 3884fd7da4cSIgor Mammedov g_sequence_remove(g_sequence_lookup(used_indexes, 3894fd7da4cSIgor Mammedov GINT_TO_POINTER(pdev->acpi_index), 3904fd7da4cSIgor Mammedov g_cmp_uint32, NULL)); 3914fd7da4cSIgor Mammedov } 3924fd7da4cSIgor Mammedov 393981c3dcdSMarkus Armbruster qdev_unrealize(dev); 394c97adf3cSDavid Hildenbrand } 395c97adf3cSDavid Hildenbrand 396c97adf3cSDavid Hildenbrand void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev, 397c97adf3cSDavid Hildenbrand AcpiPciHpState *s, DeviceState *dev, 398c97adf3cSDavid Hildenbrand Error **errp) 399c97adf3cSDavid Hildenbrand { 400c24d5e0bSIgor Mammedov PCIDevice *pdev = PCI_DEVICE(dev); 401c24d5e0bSIgor Mammedov int slot = PCI_SLOT(pdev->devfn); 402fd56e061SDavid Gibson int bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev)); 40303459ea3SMarkus Armbruster 40403459ea3SMarkus Armbruster trace_acpi_pci_unplug_request(bsel, slot); 40503459ea3SMarkus Armbruster 406c24d5e0bSIgor Mammedov if (bsel < 0) { 407c24d5e0bSIgor Mammedov error_setg(errp, "Unsupported bus. Bus doesn't have property '" 408c24d5e0bSIgor Mammedov ACPI_PCIHP_PROP_BSEL "' set"); 409c24d5e0bSIgor Mammedov return; 410c24d5e0bSIgor Mammedov } 411c24d5e0bSIgor Mammedov 4129323f892SLaurent Vivier /* 4139323f892SLaurent Vivier * pending_deleted_event is used by virtio-net failover to detect the 4149323f892SLaurent Vivier * end of the unplug operation, the flag is set to false in 4159323f892SLaurent Vivier * acpi_pcihp_eject_slot() when the operation is completed. 4169323f892SLaurent Vivier */ 4179323f892SLaurent Vivier pdev->qdev.pending_deleted_event = true; 418c24d5e0bSIgor Mammedov s->acpi_pcihp_pci_status[bsel].down |= (1U << slot); 4190058c082SIgor Mammedov acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS); 420db4728e6SMichael S. Tsirkin } 421db4728e6SMichael S. Tsirkin 422db4728e6SMichael S. Tsirkin static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size) 423db4728e6SMichael S. Tsirkin { 424db4728e6SMichael S. Tsirkin AcpiPciHpState *s = opaque; 425db4728e6SMichael S. Tsirkin uint32_t val = 0; 426db4728e6SMichael S. Tsirkin int bsel = s->hotplug_select; 427db4728e6SMichael S. Tsirkin 428fa365d7cSGonglei if (bsel < 0 || bsel >= ACPI_PCIHP_MAX_HOTPLUG_BUS) { 429db4728e6SMichael S. Tsirkin return 0; 430db4728e6SMichael S. Tsirkin } 431db4728e6SMichael S. Tsirkin 432db4728e6SMichael S. Tsirkin switch (addr) { 433a7b613cfSIgor Mammedov case PCI_UP_BASE: 4345a2223caSMichael S. Tsirkin val = s->acpi_pcihp_pci_status[bsel].up; 43599d09dd3SIgor Mammedov if (!s->legacy_piix) { 4365a2223caSMichael S. Tsirkin s->acpi_pcihp_pci_status[bsel].up = 0; 43799d09dd3SIgor Mammedov } 438df93b194SMarkus Armbruster trace_acpi_pci_up_read(val); 439db4728e6SMichael S. Tsirkin break; 440a7b613cfSIgor Mammedov case PCI_DOWN_BASE: 441db4728e6SMichael S. Tsirkin val = s->acpi_pcihp_pci_status[bsel].down; 442df93b194SMarkus Armbruster trace_acpi_pci_down_read(val); 443db4728e6SMichael S. Tsirkin break; 444a7b613cfSIgor Mammedov case PCI_EJ_BASE: 445df93b194SMarkus Armbruster trace_acpi_pci_features_read(val); 446db4728e6SMichael S. Tsirkin break; 447a7b613cfSIgor Mammedov case PCI_RMV_BASE: 448db4728e6SMichael S. Tsirkin val = s->acpi_pcihp_pci_status[bsel].hotplug_enable; 449df93b194SMarkus Armbruster trace_acpi_pci_rmv_read(val); 450db4728e6SMichael S. Tsirkin break; 451a7b613cfSIgor Mammedov case PCI_SEL_BASE: 452db4728e6SMichael S. Tsirkin val = s->hotplug_select; 453df93b194SMarkus Armbruster trace_acpi_pci_sel_read(val); 454b32bd763SIgor Mammedov break; 455b32bd763SIgor Mammedov case PCI_AIDX_BASE: 456b32bd763SIgor Mammedov val = s->acpi_index; 457b32bd763SIgor Mammedov s->acpi_index = 0; 458b32bd763SIgor Mammedov trace_acpi_pci_acpi_index_read(val); 459b32bd763SIgor Mammedov break; 460db4728e6SMichael S. Tsirkin default: 461db4728e6SMichael S. Tsirkin break; 462db4728e6SMichael S. Tsirkin } 463db4728e6SMichael S. Tsirkin 464db4728e6SMichael S. Tsirkin return val; 465db4728e6SMichael S. Tsirkin } 466db4728e6SMichael S. Tsirkin 467db4728e6SMichael S. Tsirkin static void pci_write(void *opaque, hwaddr addr, uint64_t data, 468db4728e6SMichael S. Tsirkin unsigned int size) 469db4728e6SMichael S. Tsirkin { 470b32bd763SIgor Mammedov int slot; 471b32bd763SIgor Mammedov PCIBus *bus; 472b32bd763SIgor Mammedov BusChild *kid, *next; 473db4728e6SMichael S. Tsirkin AcpiPciHpState *s = opaque; 474b32bd763SIgor Mammedov 475b32bd763SIgor Mammedov s->acpi_index = 0; 476db4728e6SMichael S. Tsirkin switch (addr) { 477b32bd763SIgor Mammedov case PCI_AIDX_BASE: 478b32bd763SIgor Mammedov /* 479b32bd763SIgor Mammedov * fetch acpi-index for specified slot so that follow up read from 480b32bd763SIgor Mammedov * PCI_AIDX_BASE can return it to guest 481b32bd763SIgor Mammedov */ 482b32bd763SIgor Mammedov slot = ctz32(data); 483b32bd763SIgor Mammedov 484b32bd763SIgor Mammedov if (s->hotplug_select >= ACPI_PCIHP_MAX_HOTPLUG_BUS) { 485b32bd763SIgor Mammedov break; 486b32bd763SIgor Mammedov } 487b32bd763SIgor Mammedov 488b32bd763SIgor Mammedov bus = acpi_pcihp_find_hotplug_bus(s, s->hotplug_select); 4899bd6565cSMichael S. Tsirkin if (!bus) { 4909bd6565cSMichael S. Tsirkin break; 4919bd6565cSMichael S. Tsirkin } 492b32bd763SIgor Mammedov QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) { 493b32bd763SIgor Mammedov Object *o = OBJECT(kid->child); 494b32bd763SIgor Mammedov PCIDevice *dev = PCI_DEVICE(o); 495b32bd763SIgor Mammedov if (PCI_SLOT(dev->devfn) == slot) { 496b32bd763SIgor Mammedov s->acpi_index = object_property_get_uint(o, "acpi-index", NULL); 497b32bd763SIgor Mammedov break; 498b32bd763SIgor Mammedov } 499b32bd763SIgor Mammedov } 500b32bd763SIgor Mammedov trace_acpi_pci_acpi_index_write(s->hotplug_select, slot, s->acpi_index); 501b32bd763SIgor Mammedov break; 502a7b613cfSIgor Mammedov case PCI_EJ_BASE: 503db4728e6SMichael S. Tsirkin if (s->hotplug_select >= ACPI_PCIHP_MAX_HOTPLUG_BUS) { 504db4728e6SMichael S. Tsirkin break; 505db4728e6SMichael S. Tsirkin } 506db4728e6SMichael S. Tsirkin acpi_pcihp_eject_slot(s, s->hotplug_select, data); 507df93b194SMarkus Armbruster trace_acpi_pci_ej_write(addr, data); 508db4728e6SMichael S. Tsirkin break; 509a7b613cfSIgor Mammedov case PCI_SEL_BASE: 510f5855994SAnthony PERARD s->hotplug_select = s->legacy_piix ? ACPI_PCIHP_BSEL_DEFAULT : data; 511df93b194SMarkus Armbruster trace_acpi_pci_sel_write(addr, data); 512db4728e6SMichael S. Tsirkin default: 513db4728e6SMichael S. Tsirkin break; 514db4728e6SMichael S. Tsirkin } 515db4728e6SMichael S. Tsirkin } 516db4728e6SMichael S. Tsirkin 517db4728e6SMichael S. Tsirkin static const MemoryRegionOps acpi_pcihp_io_ops = { 518db4728e6SMichael S. Tsirkin .read = pci_read, 519db4728e6SMichael S. Tsirkin .write = pci_write, 520db4728e6SMichael S. Tsirkin .endianness = DEVICE_LITTLE_ENDIAN, 521db4728e6SMichael S. Tsirkin .valid = { 522db4728e6SMichael S. Tsirkin .min_access_size = 4, 523db4728e6SMichael S. Tsirkin .max_access_size = 4, 524db4728e6SMichael S. Tsirkin }, 525db4728e6SMichael S. Tsirkin }; 526db4728e6SMichael S. Tsirkin 52778c2d872SIgor Mammedov void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus, 528caf108bcSJulia Suvorova MemoryRegion *address_space_io, bool bridges_enabled, 529caf108bcSJulia Suvorova uint16_t io_base) 530db4728e6SMichael S. Tsirkin { 53178c2d872SIgor Mammedov s->io_len = ACPI_PCIHP_SIZE; 532caf108bcSJulia Suvorova s->io_base = io_base; 533e358edc8SIgor Mammedov 534db4728e6SMichael S. Tsirkin s->root = root_bus; 53599d09dd3SIgor Mammedov s->legacy_piix = !bridges_enabled; 536e358edc8SIgor Mammedov 53778c2d872SIgor Mammedov memory_region_init_io(&s->io, owner, &acpi_pcihp_io_ops, s, 53878c2d872SIgor Mammedov "acpi-pci-hotplug", s->io_len); 53978c2d872SIgor Mammedov memory_region_add_subregion(address_space_io, s->io_base, &s->io); 54078c2d872SIgor Mammedov 54178c2d872SIgor Mammedov object_property_add_uint16_ptr(owner, ACPI_PCIHP_IO_BASE_PROP, &s->io_base, 542d2623129SMarkus Armbruster OBJ_PROP_FLAG_READ); 54378c2d872SIgor Mammedov object_property_add_uint16_ptr(owner, ACPI_PCIHP_IO_LEN_PROP, &s->io_len, 544d2623129SMarkus Armbruster OBJ_PROP_FLAG_READ); 545db4728e6SMichael S. Tsirkin } 546db4728e6SMichael S. Tsirkin 547b32bd763SIgor Mammedov bool vmstate_acpi_pcihp_use_acpi_index(void *opaque, int version_id) 548b32bd763SIgor Mammedov { 549b32bd763SIgor Mammedov AcpiPciHpState *s = opaque; 550b32bd763SIgor Mammedov return s->acpi_index; 551b32bd763SIgor Mammedov } 552b32bd763SIgor Mammedov 553db4728e6SMichael S. Tsirkin const VMStateDescription vmstate_acpi_pcihp_pci_status = { 554db4728e6SMichael S. Tsirkin .name = "acpi_pcihp_pci_status", 555db4728e6SMichael S. Tsirkin .version_id = 1, 556db4728e6SMichael S. Tsirkin .minimum_version_id = 1, 557db4728e6SMichael S. Tsirkin .fields = (VMStateField[]) { 558db4728e6SMichael S. Tsirkin VMSTATE_UINT32(up, AcpiPciHpPciStatus), 559db4728e6SMichael S. Tsirkin VMSTATE_UINT32(down, AcpiPciHpPciStatus), 560db4728e6SMichael S. Tsirkin VMSTATE_END_OF_LIST() 561db4728e6SMichael S. Tsirkin } 562db4728e6SMichael S. Tsirkin }; 563