mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 01:10:28 +00:00
MCS7830 USB-Ether: resume _with_ working link, via .reset_resume support
ChangeLog:
Implement .reset_resume support to retain a live network connection
during suspend despite USB power loss.
- rework operation to reference cached data in mcs7830_data and
netdev->dev_addr
- update netdev->dev_addr only in case new MAC was set successfully
. Tests done:
. ethtool -d pre-/post-suspend: register values match
. running ssh session suspend, resume: works
. ifdown device, suspend, resume: works
. ifup, suspend, unplug, resume: WORKS (eth1 is removed, re-ifup of eth1
after card replug works)
. verified identical MAC in ifconfig post-resume
(ok, should be verified on network side to be fully certain...)
Keywords: suspend resume network connection dead interface down
Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andreas Mohr
David S. Miller
parent
c774651a5f
commit
ace2a4d0fb
@ -12,8 +12,6 @@
|
||||
* Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
|
||||
*
|
||||
* TODO:
|
||||
* - add .reset_resume support (iface is _gone_ after resume w/ power loss)
|
||||
* - verify that mcs7830_get_regs() does have same output pre-/post-suspend
|
||||
* - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
|
||||
* - implement ethtool_ops get_pauseparam/set_pauseparam
|
||||
* via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
|
||||
@ -137,7 +135,7 @@ static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
|
||||
static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
|
||||
{
|
||||
struct usb_device *xdev = dev->udev;
|
||||
int ret;
|
||||
@ -211,16 +209,46 @@ out:
|
||||
usb_free_urb(urb);
|
||||
}
|
||||
|
||||
static int mcs7830_get_address(struct usbnet *dev)
|
||||
static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
|
||||
{
|
||||
int ret;
|
||||
ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
|
||||
dev->net->dev_addr);
|
||||
int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
|
||||
{
|
||||
int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
|
||||
{
|
||||
int ret;
|
||||
struct usbnet *dev = netdev_priv(netdev);
|
||||
struct sockaddr *addr = p;
|
||||
|
||||
if (netif_running(netdev))
|
||||
return -EBUSY;
|
||||
|
||||
if (!is_valid_ether_addr(addr->sa_data))
|
||||
return -EINVAL;
|
||||
|
||||
ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* it worked --> adopt it on netdev side */
|
||||
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mcs7830_read_phy(struct usbnet *dev, u8 index)
|
||||
{
|
||||
int ret;
|
||||
@ -359,33 +387,6 @@ static void mcs7830_rev_C_fixup(struct usbnet *dev)
|
||||
}
|
||||
}
|
||||
|
||||
static int mcs7830_init_dev(struct usbnet *dev)
|
||||
{
|
||||
int ret;
|
||||
int retry;
|
||||
|
||||
/* Read MAC address from EEPROM */
|
||||
ret = -EINVAL;
|
||||
for (retry = 0; retry < 5 && ret; retry++)
|
||||
ret = mcs7830_get_address(dev);
|
||||
if (ret) {
|
||||
dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Set up PHY */
|
||||
ret = mcs7830_set_autoneg(dev, 0);
|
||||
if (ret) {
|
||||
dev_info(&dev->udev->dev, "Cannot set autoneg\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
mcs7830_rev_C_fixup(dev);
|
||||
ret = 0;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
|
||||
int location)
|
||||
{
|
||||
@ -406,11 +407,33 @@ static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
|
||||
return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
|
||||
}
|
||||
|
||||
/* credits go to asix_set_multicast */
|
||||
static void mcs7830_set_multicast(struct net_device *net)
|
||||
static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
|
||||
{
|
||||
return (struct mcs7830_data *)&dev->data;
|
||||
}
|
||||
|
||||
static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
|
||||
{
|
||||
struct mcs7830_data *data = mcs7830_get_data(dev);
|
||||
mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
|
||||
sizeof data->multi_filter,
|
||||
data->multi_filter);
|
||||
}
|
||||
|
||||
static void mcs7830_hif_update_config(struct usbnet *dev)
|
||||
{
|
||||
/* implementation specific to data->config
|
||||
(argument needs to be heap-based anyway - USB DMA!) */
|
||||
struct mcs7830_data *data = mcs7830_get_data(dev);
|
||||
mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
|
||||
}
|
||||
|
||||
static void mcs7830_data_set_multicast(struct net_device *net)
|
||||
{
|
||||
struct usbnet *dev = netdev_priv(net);
|
||||
struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
|
||||
struct mcs7830_data *data = mcs7830_get_data(dev);
|
||||
|
||||
memset(data->multi_filter, 0, sizeof data->multi_filter);
|
||||
|
||||
data->config = HIF_REG_CONFIG_TXENABLE;
|
||||
|
||||
@ -433,21 +456,51 @@ static void mcs7830_set_multicast(struct net_device *net)
|
||||
u32 crc_bits;
|
||||
int i;
|
||||
|
||||
memset(data->multi_filter, 0, sizeof data->multi_filter);
|
||||
|
||||
/* Build the multicast hash filter. */
|
||||
for (i = 0; i < net->mc_count; i++) {
|
||||
crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
|
||||
data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
|
||||
mc_list = mc_list->next;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
|
||||
sizeof data->multi_filter,
|
||||
data->multi_filter);
|
||||
static int mcs7830_apply_base_config(struct usbnet *dev)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* re-configure known MAC (suspend case etc.) */
|
||||
ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
|
||||
if (ret) {
|
||||
dev_info(&dev->udev->dev, "Cannot set MAC address\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
|
||||
/* Set up PHY */
|
||||
ret = mcs7830_set_autoneg(dev, 0);
|
||||
if (ret) {
|
||||
dev_info(&dev->udev->dev, "Cannot set autoneg\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
mcs7830_hif_update_multicast_hash(dev);
|
||||
mcs7830_hif_update_config(dev);
|
||||
|
||||
mcs7830_rev_C_fixup(dev);
|
||||
ret = 0;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* credits go to asix_set_multicast */
|
||||
static void mcs7830_set_multicast(struct net_device *net)
|
||||
{
|
||||
struct usbnet *dev = netdev_priv(net);
|
||||
|
||||
mcs7830_data_set_multicast(net);
|
||||
|
||||
mcs7830_hif_update_multicast_hash(dev);
|
||||
mcs7830_hif_update_config(dev);
|
||||
}
|
||||
|
||||
static int mcs7830_get_regs_len(struct net_device *net)
|
||||
@ -491,29 +544,6 @@ static const struct ethtool_ops mcs7830_ethtool_ops = {
|
||||
.nway_reset = usbnet_nway_reset,
|
||||
};
|
||||
|
||||
static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
|
||||
{
|
||||
int ret;
|
||||
struct usbnet *dev = netdev_priv(netdev);
|
||||
struct sockaddr *addr = p;
|
||||
|
||||
if (netif_running(netdev))
|
||||
return -EBUSY;
|
||||
|
||||
if (!is_valid_ether_addr(addr->sa_data))
|
||||
return -EINVAL;
|
||||
|
||||
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
|
||||
|
||||
ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
|
||||
netdev->dev_addr);
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct net_device_ops mcs7830_netdev_ops = {
|
||||
.ndo_open = usbnet_open,
|
||||
.ndo_stop = usbnet_stop,
|
||||
@ -530,14 +560,25 @@ static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
|
||||
{
|
||||
struct net_device *net = dev->net;
|
||||
int ret;
|
||||
int retry;
|
||||
|
||||
ret = mcs7830_init_dev(dev);
|
||||
/* Initial startup: Gather MAC address setting from EEPROM */
|
||||
ret = -EINVAL;
|
||||
for (retry = 0; retry < 5 && ret; retry++)
|
||||
ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
|
||||
if (ret) {
|
||||
dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
mcs7830_data_set_multicast(net);
|
||||
|
||||
ret = mcs7830_apply_base_config(dev);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
net->ethtool_ops = &mcs7830_ethtool_ops;
|
||||
net->netdev_ops = &mcs7830_netdev_ops;
|
||||
mcs7830_set_multicast(net);
|
||||
|
||||
/* reserve space for the status byte on rx */
|
||||
dev->rx_urb_size = ETH_FRAME_LEN + 1;
|
||||
@ -622,6 +663,20 @@ static const struct usb_device_id products[] = {
|
||||
};
|
||||
MODULE_DEVICE_TABLE(usb, products);
|
||||
|
||||
static int mcs7830_reset_resume (struct usb_interface *intf)
|
||||
{
|
||||
/* YES, this function is successful enough that ethtool -d
|
||||
does show same output pre-/post-suspend */
|
||||
|
||||
struct usbnet *dev = usb_get_intfdata(intf);
|
||||
|
||||
mcs7830_apply_base_config(dev);
|
||||
|
||||
usbnet_resume(intf);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct usb_driver mcs7830_driver = {
|
||||
.name = driver_name,
|
||||
.id_table = products,
|
||||
@ -629,6 +684,7 @@ static struct usb_driver mcs7830_driver = {
|
||||
.disconnect = usbnet_disconnect,
|
||||
.suspend = usbnet_suspend,
|
||||
.resume = usbnet_resume,
|
||||
.reset_resume = mcs7830_reset_resume,
|
||||
};
|
||||
|
||||
static int __init mcs7830_init(void)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user