xen_pci_bus.c revision 275649
1/* 2 * Copyright (c) 2014 Roger Pau Monn�� <roger.pau@citrix.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/x86/xen/xen_pci_bus.c 275649 2014-12-09 18:03:25Z royger $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34 35#include <sys/pciio.h> 36#include <dev/pci/pcireg.h> 37#include <dev/pci/pcivar.h> 38#include <dev/pci/pci_private.h> 39 40#include <xen/xen-os.h> 41#include <xen/hypervisor.h> 42#include <xen/xen_pci.h> 43 44#include "pcib_if.h" 45#include "pci_if.h" 46 47void 48xen_pci_enable_msi_method(device_t dev, device_t child, uint64_t address, 49 uint16_t data) 50{ 51 struct pci_devinfo *dinfo = device_get_ivars(child); 52 struct pcicfg_msi *msi = &dinfo->cfg.msi; 53 54 /* Enable MSI in the control register. */ 55 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE; 56 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL, 57 msi->msi_ctrl, 2); 58} 59 60void 61xen_pci_disable_msi_method(device_t dev, device_t child) 62{ 63 struct pci_devinfo *dinfo = device_get_ivars(child); 64 struct pcicfg_msi *msi = &dinfo->cfg.msi; 65 66 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE; 67 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL, 68 msi->msi_ctrl, 2); 69} 70 71void 72xen_pci_child_added_method(device_t dev, device_t child) 73{ 74 struct pci_devinfo *dinfo; 75 struct physdev_pci_device_add add_pci; 76 int error; 77 78 dinfo = device_get_ivars(child); 79 KASSERT((dinfo != NULL), 80 ("xen_pci_add_child_method called with NULL dinfo")); 81 82 bzero(&add_pci, sizeof(add_pci)); 83 add_pci.seg = dinfo->cfg.domain; 84 add_pci.bus = dinfo->cfg.bus; 85 add_pci.devfn = (dinfo->cfg.slot << 3) | dinfo->cfg.func; 86 error = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, &add_pci); 87 if (error) 88 panic("unable to add device bus %u devfn %u error: %d\n", 89 add_pci.bus, add_pci.devfn, error); 90} 91