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path: root/drivers/usb/gadget
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Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/f_phonet.c93
-rw-r--r--drivers/usb/gadget/u_ether.c11
2 files changed, 60 insertions, 44 deletions
diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c
index 96fb118355b0..d2de10b9dc4b 100644
--- a/drivers/usb/gadget/f_phonet.c
+++ b/drivers/usb/gadget/f_phonet.c
@@ -35,6 +35,10 @@
#include "u_phonet.h"
#define PN_MEDIA_USB 0x1B
+#define MAXPACKET 512
+#if (PAGE_SIZE % MAXPACKET)
+#error MAXPACKET must divide PAGE_SIZE!
+#endif
/*-------------------------------------------------------------------------*/
@@ -45,6 +49,10 @@ struct phonet_port {
struct f_phonet {
struct usb_function function;
+ struct {
+ struct sk_buff *skb;
+ spinlock_t lock;
+ } rx;
struct net_device *dev;
struct usb_ep *in_ep, *out_ep;
@@ -52,7 +60,7 @@ struct f_phonet {
struct usb_request *out_reqv[0];
};
-static int phonet_rxq_size = 2;
+static int phonet_rxq_size = 17;
static inline struct f_phonet *func_to_pn(struct usb_function *f)
{
@@ -138,7 +146,7 @@ pn_hs_sink_desc = {
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
+ .wMaxPacketSize = cpu_to_le16(MAXPACKET),
};
static struct usb_endpoint_descriptor
@@ -256,25 +264,15 @@ out:
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
}
- return 0;
+ return NETDEV_TX_OK;
}
static int pn_net_mtu(struct net_device *dev, int new_mtu)
{
- struct phonet_port *port = netdev_priv(dev);
- unsigned long flags;
- int err = -EBUSY;
-
if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU))
return -EINVAL;
-
- spin_lock_irqsave(&port->lock, flags);
- if (!netif_carrier_ok(dev)) {
- dev->mtu = new_mtu;
- err = 0;
- }
- spin_unlock_irqrestore(&port->lock, flags);
- return err;
+ dev->mtu = new_mtu;
+ return 0;
}
static const struct net_device_ops pn_netdev_ops = {
@@ -308,21 +306,21 @@ static void pn_net_setup(struct net_device *dev)
static int
pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags)
{
- struct sk_buff *skb;
- const size_t size = fp->dev->mtu;
+ struct net_device *dev = fp->dev;
+ struct page *page;
int err;
- skb = alloc_skb(size, gfp_flags);
- if (!skb)
+ page = __netdev_alloc_page(dev, gfp_flags);
+ if (!page)
return -ENOMEM;
- req->buf = skb->data;
- req->length = size;
- req->context = skb;
+ req->buf = page_address(page);
+ req->length = PAGE_SIZE;
+ req->context = page;
err = usb_ep_queue(fp->out_ep, req, gfp_flags);
if (unlikely(err))
- dev_kfree_skb_any(skb);
+ netdev_free_page(dev, page);
return err;
}
@@ -330,25 +328,37 @@ static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_phonet *fp = ep->driver_data;
struct net_device *dev = fp->dev;
- struct sk_buff *skb = req->context;
+ struct page *page = req->context;
+ struct sk_buff *skb;
+ unsigned long flags;
int status = req->status;
switch (status) {
case 0:
- if (unlikely(!netif_running(dev)))
- break;
- if (unlikely(req->actual < 1))
+ spin_lock_irqsave(&fp->rx.lock, flags);
+ skb = fp->rx.skb;
+ if (!skb)
+ skb = fp->rx.skb = netdev_alloc_skb(dev, 12);
+ if (req->actual < req->length) /* Last fragment */
+ fp->rx.skb = NULL;
+ spin_unlock_irqrestore(&fp->rx.lock, flags);
+
+ if (unlikely(!skb))
break;
- skb_put(skb, req->actual);
- skb->protocol = htons(ETH_P_PHONET);
- skb_reset_mac_header(skb);
- __skb_pull(skb, 1);
- skb->dev = dev;
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
-
- netif_rx(skb);
- skb = NULL;
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 0,
+ req->actual);
+ page = NULL;
+
+ if (req->actual < req->length) { /* Last fragment */
+ skb->protocol = htons(ETH_P_PHONET);
+ skb_reset_mac_header(skb);
+ pskb_pull(skb, 1);
+ skb->dev = dev;
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+
+ netif_rx(skb);
+ }
break;
/* Do not resubmit in these cases: */
@@ -366,8 +376,8 @@ static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
break;
}
- if (skb)
- dev_kfree_skb_any(skb);
+ if (page)
+ netdev_free_page(dev, page);
if (req)
pn_rx_submit(fp, req, GFP_ATOMIC);
}
@@ -385,6 +395,10 @@ static void __pn_reset(struct usb_function *f)
usb_ep_disable(fp->out_ep);
usb_ep_disable(fp->in_ep);
+ if (fp->rx.skb) {
+ dev_kfree_skb_irq(fp->rx.skb);
+ fp->rx.skb = NULL;
+ }
}
static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
@@ -583,6 +597,7 @@ int __init phonet_bind_config(struct usb_configuration *c)
fp->function.set_alt = pn_set_alt;
fp->function.get_alt = pn_get_alt;
fp->function.disable = pn_disconnect;
+ spin_lock_init(&fp->rx.lock);
err = usb_add_function(c, &fp->function);
if (err)
diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c
index 016f63b39028..c66521953917 100644
--- a/drivers/usb/gadget/u_ether.c
+++ b/drivers/usb/gadget/u_ether.c
@@ -181,7 +181,7 @@ static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
* - ... probably more ethtool ops
*/
-static struct ethtool_ops ops = {
+static const struct ethtool_ops ops = {
.get_drvinfo = eth_get_drvinfo,
.get_link = ethtool_op_get_link,
};
@@ -465,7 +465,8 @@ static inline int is_promisc(u16 cdc_filter)
return cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
}
-static int eth_start_xmit(struct sk_buff *skb, struct net_device *net)
+static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
+ struct net_device *net)
{
struct eth_dev *dev = netdev_priv(net);
int length = skb->len;
@@ -487,7 +488,7 @@ static int eth_start_xmit(struct sk_buff *skb, struct net_device *net)
if (!in) {
dev_kfree_skb_any(skb);
- return 0;
+ return NETDEV_TX_OK;
}
/* apply outgoing CDC or RNDIS filters */
@@ -506,7 +507,7 @@ static int eth_start_xmit(struct sk_buff *skb, struct net_device *net)
type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
if (!(cdc_filter & type)) {
dev_kfree_skb_any(skb);
- return 0;
+ return NETDEV_TX_OK;
}
}
/* ignores USB_CDC_PACKET_TYPE_DIRECTED */
@@ -586,7 +587,7 @@ drop:
list_add(&req->list, &dev->tx_reqs);
spin_unlock_irqrestore(&dev->req_lock, flags);
}
- return 0;
+ return NETDEV_TX_OK;
}
/*-------------------------------------------------------------------------*/
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 06:30:49 +0000