diff options
Diffstat (limited to 'drivers/usb/gadget/u_ether.c')
| -rw-r--r-- | drivers/usb/gadget/u_ether.c | 353 |
1 files changed, 269 insertions, 84 deletions
diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c index fbe86ca9580..97b027724ee 100644 --- a/drivers/usb/gadget/u_ether.c +++ b/drivers/usb/gadget/u_ether.c @@ -9,25 +9,18 @@ * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* #define VERBOSE_DEBUG */ #include <linux/kernel.h> +#include <linux/module.h> #include <linux/gfp.h> #include <linux/device.h> #include <linux/ctype.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> +#include <linux/if_vlan.h> #include "u_ether.h" @@ -57,7 +50,6 @@ struct eth_dev { /* lock is held while accessing port_usb - * or updating its backlink port_usb->ioport */ spinlock_t lock; struct gether *port_usb; @@ -71,6 +63,8 @@ struct eth_dev { struct sk_buff_head rx_frames; + unsigned qmult; + unsigned header_len; struct sk_buff *(*wrap)(struct gether *, struct sk_buff *skb); int (*unwrap)(struct gether *, @@ -84,6 +78,7 @@ struct eth_dev { bool zlp; u8 host_mac[ETH_ALEN]; + u8 dev_mac[ETH_ALEN]; }; /*-------------------------------------------------------------------------*/ @@ -92,21 +87,11 @@ struct eth_dev { #define DEFAULT_QLEN 2 /* double buffering by default */ - -#ifdef CONFIG_USB_GADGET_DUALSPEED - -static unsigned qmult = 5; -module_param(qmult, uint, S_IRUGO|S_IWUSR); -MODULE_PARM_DESC(qmult, "queue length multiplier at high speed"); - -#else /* full speed (low speed doesn't do bulk) */ -#define qmult 1 -#endif - -/* for dual-speed hardware, use deeper queues at highspeed */ -static inline int qlen(struct usb_gadget *gadget) +/* for dual-speed hardware, use deeper queues at high/super speed */ +static inline int qlen(struct usb_gadget *gadget, unsigned qmult) { - if (gadget_is_dualspeed(gadget) && gadget->speed == USB_SPEED_HIGH) + if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH || + gadget->speed == USB_SPEED_SUPER)) return qmult * DEFAULT_QLEN; else return DEFAULT_QLEN; @@ -172,12 +157,12 @@ static int ueth_change_mtu(struct net_device *net, int new_mtu) static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) { - struct eth_dev *dev = netdev_priv(net); + struct eth_dev *dev = netdev_priv(net); - strlcpy(p->driver, "g_ether", sizeof p->driver); - strlcpy(p->version, UETH__VERSION, sizeof p->version); - strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version); - strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof p->bus_info); + strlcpy(p->driver, "g_ether", sizeof(p->driver)); + strlcpy(p->version, UETH__VERSION, sizeof(p->version)); + strlcpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version)); + strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info)); } /* REVISIT can also support: @@ -240,6 +225,9 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags) size += out->maxpacket - 1; size -= size % out->maxpacket; + if (dev->port_usb->is_fixed) + size = max_t(size_t, size, dev->port_usb->fixed_out_len); + skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags); if (skb == NULL) { DBG(dev, "no rx skb\n"); @@ -306,7 +294,7 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req) while (skb2) { if (status < 0 || ETH_HLEN > skb2->len - || skb2->len > ETH_FRAME_LEN) { + || skb2->len > VLAN_ETH_FRAME_LEN) { dev->net->stats.rx_errors++; dev->net->stats.rx_length_errors++; DBG(dev, "rx length %d\n", skb2->len); @@ -578,20 +566,28 @@ static netdev_tx_t eth_start_xmit(struct sk_buff *skb, req->context = skb; req->complete = tx_complete; + /* NCM requires no zlp if transfer is dwNtbInMaxSize */ + if (dev->port_usb->is_fixed && + length == dev->port_usb->fixed_in_len && + (length % in->maxpacket) == 0) + req->zero = 0; + else + req->zero = 1; + /* use zlp framing on tx for strict CDC-Ether conformance, * though any robust network rx path ignores extra padding. * and some hardware doesn't like to write zlps. */ - req->zero = 1; - if (!dev->zlp && (length % in->maxpacket) == 0) + if (req->zero && !dev->zlp && (length % in->maxpacket) == 0) length++; req->length = length; - /* throttle highspeed IRQ rate back slightly */ + /* throttle high/super speed IRQ rate back slightly */ if (gadget_is_dualspeed(dev->gadget)) - req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) - ? ((atomic_read(&dev->tx_qlen) % qmult) != 0) + req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH || + dev->gadget->speed == USB_SPEED_SUPER) + ? ((atomic_read(&dev->tx_qlen) % dev->qmult) != 0) : 0; retval = usb_ep_queue(in, req, GFP_ATOMIC); @@ -666,6 +662,8 @@ static int eth_stop(struct net_device *net) spin_lock_irqsave(&dev->lock, flags); if (dev->port_usb) { struct gether *link = dev->port_usb; + const struct usb_endpoint_descriptor *in; + const struct usb_endpoint_descriptor *out; if (link->close) link->close(link); @@ -679,12 +677,16 @@ static int eth_stop(struct net_device *net) * their own pace; the network stack can handle old packets. * For the moment we leave this here, since it works. */ + in = link->in_ep->desc; + out = link->out_ep->desc; usb_ep_disable(link->in_ep); usb_ep_disable(link->out_ep); if (netif_carrier_ok(net)) { DBG(dev, "host still using in/out endpoints\n"); - usb_ep_enable(link->in_ep, link->in); - usb_ep_enable(link->out_ep, link->out); + link->in_ep->desc = in; + link->out_ep->desc = out; + usb_ep_enable(link->in_ep); + usb_ep_enable(link->out_ep); } } spin_unlock_irqrestore(&dev->lock, flags); @@ -694,16 +696,6 @@ static int eth_stop(struct net_device *net) /*-------------------------------------------------------------------------*/ -/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */ -static char *dev_addr; -module_param(dev_addr, charp, S_IRUGO); -MODULE_PARM_DESC(dev_addr, "Device Ethernet Address"); - -/* this address is invisible to ifconfig */ -static char *host_addr; -module_param(host_addr, charp, S_IRUGO); -MODULE_PARM_DESC(host_addr, "Host Ethernet Address"); - static int get_ether_addr(const char *str, u8 *dev_addr) { if (str) { @@ -721,11 +713,20 @@ static int get_ether_addr(const char *str, u8 *dev_addr) if (is_valid_ether_addr(dev_addr)) return 0; } - random_ether_addr(dev_addr); + eth_random_addr(dev_addr); return 1; } -static struct eth_dev *the_dev; +static int get_ether_addr_str(u8 dev_addr[ETH_ALEN], char *str, int len) +{ + if (len < 18) + return -EINVAL; + + snprintf(str, len, "%02x:%02x:%02x:%02x:%02x:%02x", + dev_addr[0], dev_addr[1], dev_addr[2], + dev_addr[3], dev_addr[4], dev_addr[5]); + return 18; +} static const struct net_device_ops eth_netdev_ops = { .ndo_open = eth_open, @@ -741,30 +742,30 @@ static struct device_type gadget_type = { }; /** - * gether_setup - initialize one ethernet-over-usb link + * gether_setup_name - initialize one ethernet-over-usb link * @g: gadget to associated with these links * @ethaddr: NULL, or a buffer in which the ethernet address of the * host side of the link is recorded + * @netname: name for network device (for example, "usb") * Context: may sleep * * This sets up the single network link that may be exported by a * gadget driver using this framework. The link layer addresses are * set up using module parameters. * - * Returns negative errno, or zero on success + * Returns an eth_dev pointer on success, or an ERR_PTR on failure. */ -int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]) +struct eth_dev *gether_setup_name(struct usb_gadget *g, + const char *dev_addr, const char *host_addr, + u8 ethaddr[ETH_ALEN], unsigned qmult, const char *netname) { struct eth_dev *dev; struct net_device *net; int status; - if (the_dev) - return -EBUSY; - net = alloc_etherdev(sizeof *dev); if (!net) - return -ENOMEM; + return ERR_PTR(-ENOMEM); dev = netdev_priv(net); spin_lock_init(&dev->lock); @@ -777,7 +778,8 @@ int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]) /* network device setup */ dev->net = net; - strcpy(net->name, "usb%d"); + dev->qmult = qmult; + snprintf(net->name, sizeof(net->name), "%s%%d", netname); if (get_ether_addr(dev_addr, net->dev_addr)) dev_warn(&g->dev, @@ -791,13 +793,7 @@ int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]) net->netdev_ops = ð_netdev_ops; - SET_ETHTOOL_OPS(net, &ops); - - /* two kinds of host-initiated state changes: - * - iff DATA transfer is active, carrier is "on" - * - tx queueing enabled if open *and* carrier is "on" - */ - netif_carrier_off(net); + net->ethtool_ops = &ops; dev->gadget = g; SET_NETDEV_DEV(net, &g->dev); @@ -807,15 +803,201 @@ int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]) if (status < 0) { dev_dbg(&g->dev, "register_netdev failed, %d\n", status); free_netdev(net); + dev = ERR_PTR(status); } else { INFO(dev, "MAC %pM\n", net->dev_addr); INFO(dev, "HOST MAC %pM\n", dev->host_mac); - the_dev = dev; + /* + * two kinds of host-initiated state changes: + * - iff DATA transfer is active, carrier is "on" + * - tx queueing enabled if open *and* carrier is "on" + */ + netif_carrier_off(net); } + return dev; +} +EXPORT_SYMBOL_GPL(gether_setup_name); + +struct net_device *gether_setup_name_default(const char *netname) +{ + struct net_device *net; + struct eth_dev *dev; + + net = alloc_etherdev(sizeof(*dev)); + if (!net) + return ERR_PTR(-ENOMEM); + + dev = netdev_priv(net); + spin_lock_init(&dev->lock); + spin_lock_init(&dev->req_lock); + INIT_WORK(&dev->work, eth_work); + INIT_LIST_HEAD(&dev->tx_reqs); + INIT_LIST_HEAD(&dev->rx_reqs); + + skb_queue_head_init(&dev->rx_frames); + + /* network device setup */ + dev->net = net; + dev->qmult = QMULT_DEFAULT; + snprintf(net->name, sizeof(net->name), "%s%%d", netname); + + eth_random_addr(dev->dev_mac); + pr_warn("using random %s ethernet address\n", "self"); + eth_random_addr(dev->host_mac); + pr_warn("using random %s ethernet address\n", "host"); + + net->netdev_ops = ð_netdev_ops; + + net->ethtool_ops = &ops; + SET_NETDEV_DEVTYPE(net, &gadget_type); + + return net; +} +EXPORT_SYMBOL_GPL(gether_setup_name_default); + +int gether_register_netdev(struct net_device *net) +{ + struct eth_dev *dev; + struct usb_gadget *g; + struct sockaddr sa; + int status; + + if (!net->dev.parent) + return -EINVAL; + dev = netdev_priv(net); + g = dev->gadget; + status = register_netdev(net); + if (status < 0) { + dev_dbg(&g->dev, "register_netdev failed, %d\n", status); + return status; + } else { + INFO(dev, "HOST MAC %pM\n", dev->host_mac); + + /* two kinds of host-initiated state changes: + * - iff DATA transfer is active, carrier is "on" + * - tx queueing enabled if open *and* carrier is "on" + */ + netif_carrier_off(net); + } + sa.sa_family = net->type; + memcpy(sa.sa_data, dev->dev_mac, ETH_ALEN); + rtnl_lock(); + status = dev_set_mac_address(net, &sa); + rtnl_unlock(); + if (status) + pr_warn("cannot set self ethernet address: %d\n", status); + else + INFO(dev, "MAC %pM\n", dev->dev_mac); + return status; } +EXPORT_SYMBOL_GPL(gether_register_netdev); + +void gether_set_gadget(struct net_device *net, struct usb_gadget *g) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + dev->gadget = g; + SET_NETDEV_DEV(net, &g->dev); +} +EXPORT_SYMBOL_GPL(gether_set_gadget); + +int gether_set_dev_addr(struct net_device *net, const char *dev_addr) +{ + struct eth_dev *dev; + u8 new_addr[ETH_ALEN]; + + dev = netdev_priv(net); + if (get_ether_addr(dev_addr, new_addr)) + return -EINVAL; + memcpy(dev->dev_mac, new_addr, ETH_ALEN); + return 0; +} +EXPORT_SYMBOL_GPL(gether_set_dev_addr); + +int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + return get_ether_addr_str(dev->dev_mac, dev_addr, len); +} +EXPORT_SYMBOL_GPL(gether_get_dev_addr); + +int gether_set_host_addr(struct net_device *net, const char *host_addr) +{ + struct eth_dev *dev; + u8 new_addr[ETH_ALEN]; + + dev = netdev_priv(net); + if (get_ether_addr(host_addr, new_addr)) + return -EINVAL; + memcpy(dev->host_mac, new_addr, ETH_ALEN); + return 0; +} +EXPORT_SYMBOL_GPL(gether_set_host_addr); + +int gether_get_host_addr(struct net_device *net, char *host_addr, int len) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + return get_ether_addr_str(dev->host_mac, host_addr, len); +} +EXPORT_SYMBOL_GPL(gether_get_host_addr); + +int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len) +{ + struct eth_dev *dev; + + if (len < 13) + return -EINVAL; + + dev = netdev_priv(net); + snprintf(host_addr, len, "%pm", dev->host_mac); + + return strlen(host_addr); +} +EXPORT_SYMBOL_GPL(gether_get_host_addr_cdc); + +void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN]) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + memcpy(host_mac, dev->host_mac, ETH_ALEN); +} +EXPORT_SYMBOL_GPL(gether_get_host_addr_u8); + +void gether_set_qmult(struct net_device *net, unsigned qmult) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + dev->qmult = qmult; +} +EXPORT_SYMBOL_GPL(gether_set_qmult); + +unsigned gether_get_qmult(struct net_device *net) +{ + struct eth_dev *dev; + + dev = netdev_priv(net); + return dev->qmult; +} +EXPORT_SYMBOL_GPL(gether_get_qmult); + +int gether_get_ifname(struct net_device *net, char *name, int len) +{ + rtnl_lock(); + strlcpy(name, netdev_name(net), len); + rtnl_unlock(); + return strlen(name); +} +EXPORT_SYMBOL_GPL(gether_get_ifname); /** * gether_cleanup - remove Ethernet-over-USB device @@ -823,20 +1005,16 @@ int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]) * * This is called to free all resources allocated by @gether_setup(). */ -void gether_cleanup(void) +void gether_cleanup(struct eth_dev *dev) { - if (!the_dev) + if (!dev) return; - unregister_netdev(the_dev->net); - free_netdev(the_dev->net); - - /* assuming we used keventd, it must quiesce too */ - flush_scheduled_work(); - - the_dev = NULL; + unregister_netdev(dev->net); + flush_work(&dev->work); + free_netdev(dev->net); } - +EXPORT_SYMBOL_GPL(gether_cleanup); /** * gether_connect - notify network layer that USB link is active @@ -856,14 +1034,14 @@ void gether_cleanup(void) */ struct net_device *gether_connect(struct gether *link) { - struct eth_dev *dev = the_dev; + struct eth_dev *dev = link->ioport; int result = 0; if (!dev) return ERR_PTR(-EINVAL); link->in_ep->driver_data = dev; - result = usb_ep_enable(link->in_ep, link->in); + result = usb_ep_enable(link->in_ep); if (result != 0) { DBG(dev, "enable %s --> %d\n", link->in_ep->name, result); @@ -871,7 +1049,7 @@ struct net_device *gether_connect(struct gether *link) } link->out_ep->driver_data = dev; - result = usb_ep_enable(link->out_ep, link->out); + result = usb_ep_enable(link->out_ep); if (result != 0) { DBG(dev, "enable %s --> %d\n", link->out_ep->name, result); @@ -879,11 +1057,12 @@ struct net_device *gether_connect(struct gether *link) } if (result == 0) - result = alloc_requests(dev, link, qlen(dev->gadget)); + result = alloc_requests(dev, link, qlen(dev->gadget, + dev->qmult)); if (result == 0) { dev->zlp = link->is_zlp_ok; - DBG(dev, "qlen %d\n", qlen(dev->gadget)); + DBG(dev, "qlen %d\n", qlen(dev->gadget, dev->qmult)); dev->header_len = link->header_len; dev->unwrap = link->unwrap; @@ -891,7 +1070,6 @@ struct net_device *gether_connect(struct gether *link) spin_lock(&dev->lock); dev->port_usb = link; - link->ioport = dev; if (netif_running(dev->net)) { if (link->open) link->open(link); @@ -917,6 +1095,7 @@ fail0: return ERR_PTR(result); return dev->net; } +EXPORT_SYMBOL_GPL(gether_connect); /** * gether_disconnect - notify network layer that USB link is inactive @@ -941,7 +1120,10 @@ void gether_disconnect(struct gether *link) DBG(dev, "%s\n", __func__); + netif_tx_lock(dev->net); netif_stop_queue(dev->net); + netif_tx_unlock(dev->net); + netif_carrier_off(dev->net); /* disable endpoints, forcing (synchronous) completion @@ -961,7 +1143,7 @@ void gether_disconnect(struct gether *link) } spin_unlock(&dev->req_lock); link->in_ep->driver_data = NULL; - link->in = NULL; + link->in_ep->desc = NULL; usb_ep_disable(link->out_ep); spin_lock(&dev->req_lock); @@ -976,7 +1158,7 @@ void gether_disconnect(struct gether *link) } spin_unlock(&dev->req_lock); link->out_ep->driver_data = NULL; - link->out = NULL; + link->out_ep->desc = NULL; /* finish forgetting about this USB link episode */ dev->header_len = 0; @@ -985,6 +1167,9 @@ void gether_disconnect(struct gether *link) spin_lock(&dev->lock); dev->port_usb = NULL; - link->ioport = NULL; spin_unlock(&dev->lock); } +EXPORT_SYMBOL_GPL(gether_disconnect); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Brownell"); |