Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

2 files changed, 406 insertions, 0 deletions

diff --git a/qemu/roms/ipxe/src/drivers/linux/linux.c b/qemu/roms/ipxe/src/drivers/linux/linux.c
new file mode 100644
index 000000000..83546b27e
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/linux/linux.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * Linux root_device and root_driver.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <ipxe/linux.h>
+#include <ipxe/malloc.h>
+#include <ipxe/settings.h>
+
+LIST_HEAD(linux_device_requests);
+LIST_HEAD(linux_global_settings);
+
+/** Go over the device requests looking for a matching linux driver to handle them. */
+static int linux_probe(struct root_device *rootdev)
+{
+	struct linux_device_request *request;
+	struct linux_driver *driver;
+	struct linux_device *device = NULL;
+	int rc;
+
+	/* Apply global settings */
+	linux_apply_settings(&linux_global_settings, NULL);
+
+	list_for_each_entry(request, &linux_device_requests, list) {
+		if (! device)
+			device = zalloc(sizeof(*device));
+
+		if (! device)
+			return -ENOMEM;
+
+		rc = 1;
+
+		for_each_table_entry(driver, LINUX_DRIVERS) {
+			if ((rc = strcmp(driver->name, request->driver)) == 0)
+				break;
+		}
+
+		if (rc != 0) {
+			printf("Linux driver '%s' not found\n", request->driver);
+			continue;
+		}
+
+		if (! driver->can_probe) {
+			printf("Driver '%s' cannot handle any more devices\n", driver->name);
+			continue;
+		}
+
+		/* We found a matching driver so add the device to the hierarchy */
+		list_add(&device->dev.siblings, &rootdev->dev.children);
+		device->dev.parent = &rootdev->dev;
+		INIT_LIST_HEAD(&device->dev.children);
+
+		if (driver->probe(device, request) == 0) {
+			device->driver = driver;
+			device->dev.driver_name = driver->name;
+			/* Driver handled the device so release ownership */
+			device = NULL;
+		} else {
+			/* Driver failed to handle the device so remove it from the hierarchy
+			 * and reuse the object */
+			list_del(&device->dev.siblings);
+		}
+	};
+
+	free(device);
+
+	return 0;
+}
+
+/** Remove all the linux devices registered in probe() */
+static void linux_remove(struct root_device *rootdev)
+{
+	struct linux_device *device;
+	struct linux_device *tmp;
+
+	list_for_each_entry_safe(device, tmp, &rootdev->dev.children, dev.siblings) {
+		list_del(&device->dev.siblings);
+		device->driver->remove(device);
+		free(device);
+	}
+}
+
+/** Linux root driver */
+static struct root_driver linux_root_driver = {
+	.probe = linux_probe,
+	.remove = linux_remove,
+};
+
+/** Linux root device */
+struct root_device linux_root_device __root_device = {
+	.dev = { .name = "linux" },
+	.driver = &linux_root_driver,
+};
+
+struct linux_setting *linux_find_setting(char *name, struct list_head *settings)
+{
+	struct linux_setting *setting;
+	struct linux_setting *result = NULL;
+
+	/* Find the last occurrence of a setting with the specified name */
+	list_for_each_entry(setting, settings, list) {
+		if (strcmp(setting->name, name) == 0) {
+			result = setting;
+		}
+	}
+
+	return result;
+}
+
+void linux_apply_settings(struct list_head *new_settings, struct settings *settings_block)
+{
+	struct linux_setting *setting;
+	int rc;
+
+	list_for_each_entry(setting, new_settings, list) {
+		/* Skip already applied settings */
+		if (setting->applied)
+			continue;
+
+		struct setting *s = find_setting(setting->name);
+		if (s) {
+			rc = storef_setting(settings_block, find_setting(setting->name), setting->value);
+			if (rc != 0)
+				DBG("linux storing setting '%s' = '%s' failed\n", setting->name, setting->value);
+			setting->applied = 1;
+		} else {
+			DBG("linux unknown setting '%s'\n", setting->name);
+		}
+	}
+}
diff --git a/qemu/roms/ipxe/src/drivers/linux/tap.c b/qemu/roms/ipxe/src/drivers/linux/tap.c
new file mode 100644
index 000000000..979436654
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/linux/tap.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <linux_api.h>
+#include <ipxe/list.h>
+#include <ipxe/linux.h>
+#include <ipxe/malloc.h>
+#include <ipxe/device.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/ethernet.h>
+#include <ipxe/settings.h>
+#include <ipxe/socket.h>
+
+/* This hack prevents pre-2.6.32 headers from redefining struct sockaddr */
+#define __GLIBC__ 2
+#include <linux/socket.h>
+#undef __GLIBC__
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/if_tun.h>
+
+#define RX_BUF_SIZE 1536
+
+/** @file
+ *
+ * The TAP driver.
+ *
+ * The TAP is a Virtual Ethernet network device.
+ */
+
+struct tap_nic {
+	/** Tap interface name */
+	char * interface;
+	/** File descriptor of the opened tap device */
+	int fd;
+};
+
+/** Open the TAP device */
+static int tap_open(struct net_device * netdev)
+{
+	struct tap_nic * nic = netdev->priv;
+	struct ifreq ifr;
+	int ret;
+
+	nic->fd = linux_open("/dev/net/tun", O_RDWR);
+	if (nic->fd < 0) {
+		DBGC(nic, "tap %p open('/dev/net/tun') = %d (%s)\n", nic, nic->fd, linux_strerror(linux_errno));
+		return nic->fd;
+	}
+
+	memset(&ifr, 0, sizeof(ifr));
+	/* IFF_NO_PI for no extra packet information */
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+	strncpy(ifr.ifr_name, nic->interface, IFNAMSIZ);
+	DBGC(nic, "tap %p interface = '%s'\n", nic, nic->interface);
+
+	ret = linux_ioctl(nic->fd, TUNSETIFF, &ifr);
+
+	if (ret != 0) {
+		DBGC(nic, "tap %p ioctl(%d, ...) = %d (%s)\n", nic, nic->fd, ret, linux_strerror(linux_errno));
+		linux_close(nic->fd);
+		return ret;
+	}
+
+	/* Set nonblocking mode to make tap_poll easier */
+	ret = linux_fcntl(nic->fd, F_SETFL, O_NONBLOCK);
+
+	if (ret != 0) {
+		DBGC(nic, "tap %p fcntl(%d, ...) = %d (%s)\n", nic, nic->fd, ret, linux_strerror(linux_errno));
+		linux_close(nic->fd);
+		return ret;
+	}
+
+	return 0;
+}
+
+/** Close the TAP device */
+static void tap_close(struct net_device *netdev)
+{
+	struct tap_nic * nic = netdev->priv;
+	linux_close(nic->fd);
+}
+
+/**
+ * Transmit an ethernet packet.
+ *
+ * The packet can be written to the TAP device and marked as complete immediately.
+ */
+static int tap_transmit(struct net_device *netdev, struct io_buffer *iobuf)
+{
+	struct tap_nic * nic = netdev->priv;
+	int rc;
+
+	/* Pad and align packet */
+	iob_pad(iobuf, ETH_ZLEN);
+
+	rc = linux_write(nic->fd, iobuf->data, iobuf->tail - iobuf->data);
+	DBGC2(nic, "tap %p wrote %d bytes\n", nic, rc);
+	netdev_tx_complete(netdev, iobuf);
+
+	return 0;
+}
+
+/** Poll for new packets */
+static void tap_poll(struct net_device *netdev)
+{
+	struct tap_nic * nic = netdev->priv;
+	struct pollfd pfd;
+	struct io_buffer * iobuf;
+	int r;
+
+	pfd.fd = nic->fd;
+	pfd.events = POLLIN;
+	if (linux_poll(&pfd, 1, 0) == -1) {
+		DBGC(nic, "tap %p poll failed (%s)\n", nic, linux_strerror(linux_errno));
+		return;
+	}
+	if ((pfd.revents & POLLIN) == 0)
+		return;
+
+	/* At this point we know there is at least one new packet to be read */
+
+	iobuf = alloc_iob(RX_BUF_SIZE);
+	if (! iobuf)
+		goto allocfail;
+
+	while ((r = linux_read(nic->fd, iobuf->data, RX_BUF_SIZE)) > 0) {
+		DBGC2(nic, "tap %p read %d bytes\n", nic, r);
+
+		iob_put(iobuf, r);
+		netdev_rx(netdev, iobuf);
+
+		iobuf = alloc_iob(RX_BUF_SIZE);
+		if (! iobuf)
+			goto allocfail;
+	}
+
+	free_iob(iobuf);
+	return;
+
+allocfail:
+	DBGC(nic, "tap %p alloc_iob failed\n", nic);
+}
+
+/**
+ * Set irq.
+ *
+ * Not used on linux, provide a dummy implementation.
+ */
+static void tap_irq(struct net_device *netdev, int enable)
+{
+	struct tap_nic *nic = netdev->priv;
+
+	DBGC(nic, "tap %p irq enable = %d\n", nic, enable);
+}
+
+/** Tap operations */
+static struct net_device_operations tap_operations = {
+	.open		= tap_open,
+	.close		= tap_close,
+	.transmit	= tap_transmit,
+	.poll		= tap_poll,
+	.irq		= tap_irq,
+};
+
+/** Handle a device request for the tap driver */
+static int tap_probe(struct linux_device *device, struct linux_device_request *request)
+{
+	struct linux_setting *if_setting;
+	struct net_device *netdev;
+	struct tap_nic *nic;
+	int rc;
+
+	netdev = alloc_etherdev(sizeof(*nic));
+	if (! netdev)
+		return -ENOMEM;
+
+	netdev_init(netdev, &tap_operations);
+	nic = netdev->priv;
+	linux_set_drvdata(device, netdev);
+	netdev->dev = &device->dev;
+	memset(nic, 0, sizeof(*nic));
+
+	/* Look for the mandatory if setting */
+	if_setting = linux_find_setting("if", &request->settings);
+
+	/* No if setting */
+	if (! if_setting) {
+		printf("tap missing a mandatory if setting\n");
+		rc = -EINVAL;
+		goto err_settings;
+	}
+
+	nic->interface = if_setting->value;
+	snprintf ( device->dev.name, sizeof ( device->dev.name ), "%s",
+		   nic->interface );
+	device->dev.desc.bus_type = BUS_TYPE_TAP;
+	if_setting->applied = 1;
+
+	/* Apply rest of the settings */
+	linux_apply_settings(&request->settings, &netdev->settings.settings);
+
+	/* Register network device */
+	if ((rc = register_netdev(netdev)) != 0)
+		goto err_register;
+
+	netdev_link_up(netdev);
+
+	return 0;
+
+err_settings:
+	unregister_netdev(netdev);
+err_register:
+	netdev_nullify(netdev);
+	netdev_put(netdev);
+	return rc;
+}
+
+/** Remove the device */
+static void tap_remove(struct linux_device *device)
+{
+	struct net_device *netdev = linux_get_drvdata(device);
+	unregister_netdev(netdev);
+	netdev_nullify(netdev);
+	netdev_put(netdev);
+}
+
+/** Tap linux_driver */
+struct linux_driver tap_driver __linux_driver = {
+	.name = "tap",
+	.probe = tap_probe,
+	.remove = tap_remove,
+	.can_probe = 1,
+};