From ca1d23790a16d7f5c4c4644a3c70ad9706e6faf4 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Thu, 19 Feb 2009 21:28:09 -0300
Subject: [PATCH 1/3] Parse full PCI device addresses (Markus Armbruster)

This code parses full PCI device addresses.  It then rejects domains
other than zero, because these are not supported in QEMU.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Bugzilla: 489992
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
---
 qemu/hw/pci.c |   77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 qemu/hw/pci.h |    3 ++
 2 files changed, 80 insertions(+), 0 deletions(-)

diff --git a/qemu/hw/pci.c b/qemu/hw/pci.c
index 5910c8a..27bdb7c 100644
--- a/qemu/hw/pci.c
+++ b/qemu/hw/pci.c
@@ -28,6 +28,7 @@
 #include "virtio-net.h"
 #include "pc.h"
 #include "qemu-kvm.h"
+#include "sysemu.h"
 
 //#define DEBUG_PCI
 
@@ -161,6 +162,82 @@ static int pci_set_default_subsystem_id(PCIDevice *pci_dev)
     return 0;
 }
 
+/*
+ * Parse [[<domain>:]<bus>:]<slot>, return -1 on error
+ */
+static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp)
+{
+    const char *p;
+    char *e;
+    unsigned long val;
+    unsigned long dom = 0, bus = 0;
+    unsigned slot = 0;
+
+    p = addr;
+    val = strtoul(p, &e, 16);
+    if (e == p)
+	return -1;
+    if (*e == ':') {
+	bus = val;
+	p = e + 1;
+	val = strtoul(p, &e, 16);
+	if (e == p)
+	    return -1;
+	if (*e == ':') {
+	    dom = bus;
+	    bus = val;
+	    p = e + 1;
+	    val = strtoul(p, &e, 16);
+	    if (e == p)
+		return -1;
+	}
+    }
+
+    if (dom > 0xffff || bus > 0xff || val > 0x1f)
+	return -1;
+
+    slot = val;
+
+    if (*e)
+	return -1;
+
+    /* Note: QEMU doesn't implement domains other than 0 */
+    if (dom != 0 || pci_find_bus(bus) == NULL)
+	return -1;
+
+    *domp = dom;
+    *busp = bus;
+    *slotp = slot;
+    return 0;
+}
+
+int pci_read_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp)
+{
+    char devaddr[32];
+
+    if (!get_param_value(devaddr, sizeof(devaddr), "pci_addr", addr))
+        return -1;
+
+    return pci_parse_devaddr(devaddr, domp, busp, slotp);
+}
+
+int pci_assign_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp)
+{
+    char devaddr[32];
+
+    if (!get_param_value(devaddr, sizeof(devaddr), "pci_addr", addr))
+	return -1;
+
+    if (!strcmp(devaddr, "auto")) {
+        *domp = *busp = 0;
+        *slotp = -1;
+        /* want to support dom/bus auto-assign at some point */
+        return 0;
+    }
+
+    return pci_parse_devaddr(devaddr, domp, busp, slotp);
+}
+
 /* -1 for devfn means auto assign */
 PCIDevice *pci_register_device(PCIBus *bus, const char *name,
                                int instance_size, int devfn,
diff --git a/qemu/hw/pci.h b/qemu/hw/pci.h
index 060183a..5667f36 100644
--- a/qemu/hw/pci.h
+++ b/qemu/hw/pci.h
@@ -135,6 +135,9 @@ void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d));
 PCIBus *pci_find_bus(int bus_num);
 PCIDevice *pci_find_device(int bus_num, int slot);
 
+int pci_read_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp);
+int pci_assign_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp);
+
 void pci_info(void);
 PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
                         pci_map_irq_fn map_irq, const char *name);
-- 
1.6.1