1 /*
2 * Copyright (c) 2014 Roger Pau Monné <[email protected]>
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("$FreeBSD$");
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
47 void
xen_pci_enable_msi_method(device_t dev,device_t child,uint64_t address,uint16_t data)48 xen_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
60 void
xen_pci_disable_msi_method(device_t dev,device_t child)61 xen_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
71 void
xen_pci_child_added_method(device_t dev,device_t child)72 xen_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