diff options
Diffstat (limited to 'hw/usb/hcd-xhci-pci.c')
| -rw-r--r-- | hw/usb/hcd-xhci-pci.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/hw/usb/hcd-xhci-pci.c b/hw/usb/hcd-xhci-pci.c new file mode 100644 index 000000000..e934b1a5b --- /dev/null +++ b/hw/usb/hcd-xhci-pci.c @@ -0,0 +1,262 @@ +/* + * USB xHCI controller with PCI bus emulation + * + * SPDX-FileCopyrightText: 2011 Securiforest + * SPDX-FileContributor: Hector Martin <hector@marcansoft.com> + * SPDX-sourceInfo: Based on usb-ohci.c, emulates Renesas NEC USB 3.0 + * SPDX-FileCopyrightText: 2020 Xilinx + * SPDX-FileContributor: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com> + * SPDX-sourceInfo: Moved the pci specific content for hcd-xhci.c to + * hcd-xhci-pci.c + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ +#include "qemu/osdep.h" +#include "hw/pci/pci.h" +#include "hw/qdev-properties.h" +#include "migration/vmstate.h" +#include "hw/pci/msi.h" +#include "hw/pci/msix.h" +#include "hcd-xhci-pci.h" +#include "trace.h" +#include "qapi/error.h" + +#define OFF_MSIX_TABLE 0x3000 +#define OFF_MSIX_PBA 0x3800 + +static void xhci_pci_intr_update(XHCIState *xhci, int n, bool enable) +{ + XHCIPciState *s = container_of(xhci, XHCIPciState, xhci); + PCIDevice *pci_dev = PCI_DEVICE(s); + + if (!msix_enabled(pci_dev)) { + return; + } + if (enable == !!xhci->intr[n].msix_used) { + return; + } + if (enable) { + trace_usb_xhci_irq_msix_use(n); + msix_vector_use(pci_dev, n); + xhci->intr[n].msix_used = true; + } else { + trace_usb_xhci_irq_msix_unuse(n); + msix_vector_unuse(pci_dev, n); + xhci->intr[n].msix_used = false; + } +} + +static bool xhci_pci_intr_raise(XHCIState *xhci, int n, bool level) +{ + XHCIPciState *s = container_of(xhci, XHCIPciState, xhci); + PCIDevice *pci_dev = PCI_DEVICE(s); + + if (n == 0 && + !(msix_enabled(pci_dev) || + msi_enabled(pci_dev))) { + pci_set_irq(pci_dev, level); + } + + if (msix_enabled(pci_dev) && level) { + msix_notify(pci_dev, n); + return true; + } + + if (msi_enabled(pci_dev) && level) { + msi_notify(pci_dev, n); + return true; + } + + return false; +} + +static void xhci_pci_reset(DeviceState *dev) +{ + XHCIPciState *s = XHCI_PCI(dev); + + device_legacy_reset(DEVICE(&s->xhci)); +} + +static int xhci_pci_vmstate_post_load(void *opaque, int version_id) +{ + XHCIPciState *s = XHCI_PCI(opaque); + PCIDevice *pci_dev = PCI_DEVICE(s); + int intr; + + for (intr = 0; intr < s->xhci.numintrs; intr++) { + if (s->xhci.intr[intr].msix_used) { + msix_vector_use(pci_dev, intr); + } else { + msix_vector_unuse(pci_dev, intr); + } + } + return 0; +} + +static void usb_xhci_pci_realize(struct PCIDevice *dev, Error **errp) +{ + int ret; + Error *err = NULL; + XHCIPciState *s = XHCI_PCI(dev); + + dev->config[PCI_CLASS_PROG] = 0x30; /* xHCI */ + dev->config[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin 1 */ + dev->config[PCI_CACHE_LINE_SIZE] = 0x10; + dev->config[0x60] = 0x30; /* release number */ + + object_property_set_link(OBJECT(&s->xhci), "host", OBJECT(s), NULL); + s->xhci.intr_update = xhci_pci_intr_update; + s->xhci.intr_raise = xhci_pci_intr_raise; + if (!qdev_realize(DEVICE(&s->xhci), NULL, errp)) { + return; + } + if (strcmp(object_get_typename(OBJECT(dev)), TYPE_NEC_XHCI) == 0) { + s->xhci.nec_quirks = true; + } + + if (s->msi != ON_OFF_AUTO_OFF) { + ret = msi_init(dev, 0x70, s->xhci.numintrs, true, false, &err); + /* + * Any error other than -ENOTSUP(board's MSI support is broken) + * is a programming error + */ + assert(!ret || ret == -ENOTSUP); + if (ret && s->msi == ON_OFF_AUTO_ON) { + /* Can't satisfy user's explicit msi=on request, fail */ + error_append_hint(&err, "You have to use msi=auto (default) or " + "msi=off with this machine type.\n"); + error_propagate(errp, err); + return; + } + assert(!err || s->msi == ON_OFF_AUTO_AUTO); + /* With msi=auto, we fall back to MSI off silently */ + error_free(err); + } + pci_register_bar(dev, 0, + PCI_BASE_ADDRESS_SPACE_MEMORY | + PCI_BASE_ADDRESS_MEM_TYPE_64, + &s->xhci.mem); + + if (pci_bus_is_express(pci_get_bus(dev)) || + xhci_get_flag(&s->xhci, XHCI_FLAG_FORCE_PCIE_ENDCAP)) { + ret = pcie_endpoint_cap_init(dev, 0xa0); + assert(ret > 0); + } + + if (s->msix != ON_OFF_AUTO_OFF) { + /* TODO check for errors, and should fail when msix=on */ + msix_init(dev, s->xhci.numintrs, + &s->xhci.mem, 0, OFF_MSIX_TABLE, + &s->xhci.mem, 0, OFF_MSIX_PBA, + 0x90, NULL); + } + s->xhci.as = pci_get_address_space(dev); +} + +static void usb_xhci_pci_exit(PCIDevice *dev) +{ + XHCIPciState *s = XHCI_PCI(dev); + /* destroy msix memory region */ + if (dev->msix_table && dev->msix_pba + && dev->msix_entry_used) { + msix_uninit(dev, &s->xhci.mem, &s->xhci.mem); + } +} + +static const VMStateDescription vmstate_xhci_pci = { + .name = "xhci", + .version_id = 1, + .post_load = xhci_pci_vmstate_post_load, + .fields = (VMStateField[]) { + VMSTATE_PCI_DEVICE(parent_obj, XHCIPciState), + VMSTATE_MSIX(parent_obj, XHCIPciState), + VMSTATE_STRUCT(xhci, XHCIPciState, 1, vmstate_xhci, XHCIState), + VMSTATE_END_OF_LIST() + } +}; + +static void xhci_instance_init(Object *obj) +{ + XHCIPciState *s = XHCI_PCI(obj); + /* + * QEMU_PCI_CAP_EXPRESS initialization does not depend on QEMU command + * line, therefore, no need to wait to realize like other devices + */ + PCI_DEVICE(obj)->cap_present |= QEMU_PCI_CAP_EXPRESS; + object_initialize_child(obj, "xhci-core", &s->xhci, TYPE_XHCI); + qdev_alias_all_properties(DEVICE(&s->xhci), obj); +} + +static void xhci_class_init(ObjectClass *klass, void *data) +{ + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = xhci_pci_reset; + dc->vmsd = &vmstate_xhci_pci; + set_bit(DEVICE_CATEGORY_USB, dc->categories); + k->realize = usb_xhci_pci_realize; + k->exit = usb_xhci_pci_exit; + k->class_id = PCI_CLASS_SERIAL_USB; +} + +static const TypeInfo xhci_pci_info = { + .name = TYPE_XHCI_PCI, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(XHCIPciState), + .class_init = xhci_class_init, + .instance_init = xhci_instance_init, + .abstract = true, + .interfaces = (InterfaceInfo[]) { + { INTERFACE_PCIE_DEVICE }, + { INTERFACE_CONVENTIONAL_PCI_DEVICE }, + { } + }, +}; + +static void qemu_xhci_class_init(ObjectClass *klass, void *data) +{ + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->vendor_id = PCI_VENDOR_ID_REDHAT; + k->device_id = PCI_DEVICE_ID_REDHAT_XHCI; + k->revision = 0x01; +} + +static void qemu_xhci_instance_init(Object *obj) +{ + XHCIPciState *s = XHCI_PCI(obj); + XHCIState *xhci = &s->xhci; + + s->msi = ON_OFF_AUTO_OFF; + s->msix = ON_OFF_AUTO_AUTO; + xhci->numintrs = XHCI_MAXINTRS; + xhci->numslots = XHCI_MAXSLOTS; + xhci_set_flag(xhci, XHCI_FLAG_SS_FIRST); +} + +static const TypeInfo qemu_xhci_info = { + .name = TYPE_QEMU_XHCI, + .parent = TYPE_XHCI_PCI, + .class_init = qemu_xhci_class_init, + .instance_init = qemu_xhci_instance_init, +}; + +static void xhci_register_types(void) +{ + type_register_static(&xhci_pci_info); + type_register_static(&qemu_xhci_info); +} + +type_init(xhci_register_types) |