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Diffstat (limited to 'sys/x86/xen/xen_pci_bus.c')
-rw-r--r--sys/x86/xen/xen_pci_bus.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/sys/x86/xen/xen_pci_bus.c b/sys/x86/xen/xen_pci_bus.c
new file mode 100644
index 000000000000..e75463fa0249
--- /dev/null
+++ b/sys/x86/xen/xen_pci_bus.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2014 Roger Pau Monné <roger.pau@citrix.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+
+#include <sys/pciio.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pci_private.h>
+
+#include <xen/xen-os.h>
+#include <xen/hypervisor.h>
+#include <xen/xen_pci.h>
+
+#include "pcib_if.h"
+#include "pci_if.h"
+
+void
+xen_pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
+ uint16_t data)
+{
+ struct pci_devinfo *dinfo = device_get_ivars(child);
+ struct pcicfg_msi *msi = &dinfo->cfg.msi;
+
+ /* Enable MSI in the control register. */
+ msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
+ pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
+ msi->msi_ctrl, 2);
+}
+
+void
+xen_pci_disable_msi_method(device_t dev, device_t child)
+{
+ struct pci_devinfo *dinfo = device_get_ivars(child);
+ struct pcicfg_msi *msi = &dinfo->cfg.msi;
+
+ msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
+ pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
+ msi->msi_ctrl, 2);
+}
+
+void
+xen_pci_child_added_method(device_t dev, device_t child)
+{
+ struct pci_devinfo *dinfo;
+ struct physdev_pci_device_add add_pci;
+ int error;
+
+ dinfo = device_get_ivars(child);
+ KASSERT((dinfo != NULL),
+ ("xen_pci_add_child_method called with NULL dinfo"));
+
+ bzero(&add_pci, sizeof(add_pci));
+ add_pci.seg = dinfo->cfg.domain;
+ add_pci.bus = dinfo->cfg.bus;
+ add_pci.devfn = (dinfo->cfg.slot << 3) | dinfo->cfg.func;
+ error = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, &add_pci);
+ if (error)
+ panic("unable to add device bus %u devfn %u error: %d\n",
+ add_pci.bus, add_pci.devfn, error);
+}