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[PATCH] usb gadget: ethernet/rndis updates 

Updates to the Ethernet/RNDIS gadget driver (mostly for RNDIS):

  - Fix brown-paper bag goof with RNDIS packet TX ... the wrong length
    field got set, so Windows would ignore data packets it received.

  - More consistent handling of CDC output filters (but not yet hooking
    things up so RNDIS uses the mechanism).

  - Zerocopy RX for RNDIS packets too (saving CPU cycles).

  - Use the pre-allocated interrupt/status request and buffer, rather
    than allocating and freeing one of each every few seconds (which
    could fail).

  - Some more "sparse" tweaks, making both dual-speed and single-speed
    configurations happier.

  - RNDIS speeds are reported in units of 100bps, not bps.

Plus two minor cleanups (whitespace, messaging).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2005-04-18 17:39:34 -07:00 коммит произвёл Greg K-H
Родитель 1bc3c9e1e4
Коммит 6cdee106e7
3 изменённых файлов: 45 добавлений и 54 удалений
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56
drivers/usb/gadget/ether.c
Просмотреть файл

@ -100,6 +100,8 @@ static const char driver_desc [] = DRIVER_DESC;
/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|USB_CDC_PACKET_TYPE_DIRECTED)
@ -322,12 +324,18 @@ module_param (qmult, uint, S_IRUGO|S_IWUSR);
/* also defer IRQs on highspeed TX */
#define TX_DELAY qmult
#define BITRATE(g) (((g)->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS)
static inline int BITRATE(struct usb_gadget *g)
{
return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
}
#else /* full speed (low speed doesn't do bulk) */
#define qlen(gadget) DEFAULT_QLEN
#define BITRATE(g) FS_BPS
static inline int BITRATE(struct usb_gadget *g)
{
return FS_BPS;
}
#endif
@ -1167,7 +1175,7 @@ eth_set_config (struct eth_dev *dev, unsigned number, int gfp_flags)
eth_reset_config (dev);
/* default: pass all packets, no multicast filtering */
dev->cdc_filter = 0x000f;
dev->cdc_filter = DEFAULT_FILTER;
switch (number) {
case DEV_CONFIG_VALUE:
@ -1343,9 +1351,9 @@ eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
struct eth_dev *dev = get_gadget_data (gadget);
struct usb_request *req = dev->req;
int value = -EOPNOTSUPP;
u16 wIndex = ctrl->wIndex;
u16 wValue = ctrl->wValue;
u16 wLength = ctrl->wLength;
u16 wIndex = (__force u16) ctrl->wIndex;
u16 wValue = (__force u16) ctrl->wValue;
u16 wLength = (__force u16) ctrl->wLength;
/* descriptors just go into the pre-allocated ep0 buffer,
* while config change events may enable network traffic.
@ -1693,7 +1701,7 @@ rx_submit (struct eth_dev *dev, struct usb_request *req, int gfp_flags)
/* Some platforms perform better when IP packets are aligned,
* but on at least one, checksumming fails otherwise. Note:
* this doesn't account for variable-sized RNDIS headers.
* RNDIS headers involve variable numbers of LE32 values.
*/
skb_reserve(skb, NET_IP_ALIGN);
@ -1730,9 +1738,11 @@ static void rx_complete (struct usb_ep *ep, struct usb_request *req)
#ifdef CONFIG_USB_ETH_RNDIS
/* we know MaxPacketsPerTransfer == 1 here */
if (dev->rndis)
rndis_rm_hdr (req->buf, &(skb->len));
status = rndis_rm_hdr (skb);
#endif
if (ETH_HLEN > skb->len || skb->len > ETH_FRAME_LEN) {
if (status < 0
|| ETH_HLEN > skb->len
|| skb->len > ETH_FRAME_LEN) {
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
DEBUG (dev, "rx length %d\n", skb->len);
@ -2047,38 +2057,20 @@ rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
DEBUG ((struct eth_dev *) ep->driver_data,
"rndis control ack complete --> %d, %d/%d\n",
req->status, req->actual, req->length);
usb_ep_free_buffer(ep, req->buf, req->dma, 8);
usb_ep_free_request(ep, req);
}
static int rndis_control_ack (struct net_device *net)
{
struct eth_dev *dev = netdev_priv(net);
u32 length;
struct usb_request *resp;
struct usb_request *resp = dev->stat_req;
/* in case RNDIS calls this after disconnect */
if (!dev->status_ep) {
if (!dev->status) {
DEBUG (dev, "status ENODEV\n");
return -ENODEV;
}
/* Allocate memory for notification ie. ACK */
resp = usb_ep_alloc_request (dev->status_ep, GFP_ATOMIC);
if (!resp) {
DEBUG (dev, "status ENOMEM\n");
return -ENOMEM;
}
resp->buf = usb_ep_alloc_buffer (dev->status_ep, 8,
&resp->dma, GFP_ATOMIC);
if (!resp->buf) {
DEBUG (dev, "status buf ENOMEM\n");
usb_ep_free_request (dev->status_ep, resp);
return -ENOMEM;
}
/* Send RNDIS RESPONSE_AVAILABLE notification;
* USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
*/
@ -2113,7 +2105,7 @@ static void eth_start (struct eth_dev *dev, int gfp_flags)
if (dev->rndis) {
rndis_set_param_medium (dev->rndis_config,
NDIS_MEDIUM_802_3,
BITRATE(dev->gadget));
BITRATE(dev->gadget)/100);
rndis_send_media_state (dev, 1);
}
#endif
@ -2307,8 +2299,8 @@ eth_bind (struct usb_gadget *gadget)
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
} else if (gadget_is_pxa27x(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
} else if (gadget_is_s3c2410(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
} else if (gadget_is_s3c2410(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
} else if (gadget_is_at91(gadget)) {
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
} else {

40
drivers/usb/gadget/rndis.c
Просмотреть файл

@ -37,6 +37,7 @@
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#undef RNDIS_PM
@ -165,7 +166,7 @@ static int gen_ndis_query_resp (int configNr, u32 OID, rndis_resp_t *r)
/* mandatory */
case OID_GEN_LINK_SPEED:
DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
// DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
length = 4;
if (rndis_per_dev_params [configNr].media_state
== NDIS_MEDIA_STATE_DISCONNECTED)
@ -729,7 +730,7 @@ static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len,
retval = 0;
/* FIXME use these NDIS_PACKET_TYPE_* bitflags to
* filter packets in hard_start_xmit()
* set the cdc_filter; it's not RNDIS-specific
* NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
* PROMISCUOUS, DIRECTED,
* MULTICAST, ALL_MULTICAST, BROADCAST
@ -1194,10 +1195,10 @@ void rndis_add_hdr (struct sk_buff *skb)
return;
header = (void *) skb_push (skb, sizeof *header);
memset (header, 0, sizeof *header);
header->MessageType = __constant_cpu_to_le32 (1);
header->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
header->MessageLength = cpu_to_le32(skb->len);
header->DataOffset = __constant_cpu_to_le32 (36);
header->OOBDataOffset = cpu_to_le32(skb->len - 44);
header->DataLength = cpu_to_le32(skb->len - sizeof *header);
}
void rndis_free_response (int configNr, u8 *buf)
@ -1253,26 +1254,23 @@ static rndis_resp_t *rndis_add_response (int configNr, u32 length)
return r;
}
int rndis_rm_hdr (u8 *buf, u32 *length)
int rndis_rm_hdr(struct sk_buff *skb)
{
u32 i, messageLen, dataOffset;
__le32 *tmp;
tmp = (__le32 *) buf;
/* tmp points to a struct rndis_packet_msg_type */
__le32 *tmp = (void *) skb->data;
if (!buf || !length) return -1;
if (le32_to_cpup(tmp++) != 1) return -1;
messageLen = le32_to_cpup(tmp++);
dataOffset = le32_to_cpup(tmp++) + 8;
/* MessageType, MessageLength */
if (__constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
!= get_unaligned(tmp++))
return -EINVAL;
tmp++;
/* DataOffset, DataLength */
if (!skb_pull(skb, le32_to_cpu(get_unaligned(tmp++))
+ 8 /* offset of DataOffset */))
return -EOVERFLOW;
skb_trim(skb, le32_to_cpu(get_unaligned(tmp++)));
if (messageLen < dataOffset || messageLen > *length) return -1;
for (i = dataOffset; i < messageLen; i++)
buf [i - dataOffset] = buf [i];
*length = messageLen - dataOffset;
return 0;
}

3
drivers/usb/gadget/rndis.h
Просмотреть файл

@ -38,6 +38,7 @@
*/
/* Message Set for Connectionless (802.3) Devices */
#define REMOTE_NDIS_PACKET_MSG 0x00000001U
#define REMOTE_NDIS_INITIALIZE_MSG 0x00000002U /* Initialize device */
#define REMOTE_NDIS_HALT_MSG 0x00000003U
#define REMOTE_NDIS_QUERY_MSG 0x00000004U
@ -333,7 +334,7 @@ int rndis_set_param_vendor (u8 configNr, u32 vendorID,
const char *vendorDescr);
int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
void rndis_add_hdr (struct sk_buff *skb);
int rndis_rm_hdr (u8 *buf, u32 *length);
int rndis_rm_hdr (struct sk_buff *skb);
u8 *rndis_get_next_response (int configNr, u32 *length);
void rndis_free_response (int configNr, u8 *buf);