rndis.c

omap3 linux 2.6 用nocc去除了冗余代码

/*
 * RNDIS MSG parser
 *
 * Version:     $Id: rndis.c,v 1.19 2004/03/25 21:33:46 robert Exp $
 *
 * Authors:	Benedikt Spranger, Pengutronix
 *		Robert Schwebel, Pengutronix
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              version 2, as published by the Free Software Foundation.
 *
 *		This software was originally developed in conformance with
 *		Microsoft's Remote NDIS Specification License Agreement.
 *
 * 03/12/2004 Kai-Uwe Bloem <[e-mail]>
 *		Fixed message length bug in init_response
 *
 * 03/25/2004 Kai-Uwe Bloem <[e-mail]>
 *		Fixed rndis_rm_hdr length bug.
 *
 * Copyright (C) 2004 by David Brownell
 *		updates to merge with Linux 2.6, better match RNDIS spec
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/netdevice.h>

#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/unaligned.h>


#undef	RNDIS_PM
#undef	RNDIS_WAKEUP
#undef	VERBOSE

#include "rndis.h"


/* The driver for your USB chip needs to support ep0 OUT to work with
 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
 *
 * Windows hosts need an INF file like Documentation/usb/linux.inf
 * and will be happier if you provide the host_addr module parameter.
 */


#define rndis_debug		0
#define DEBUG(str,args...)	do{}while(0)

#define RNDIS_MAX_CONFIGS	1


static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];

/* Driver Version */
static const __le32 rndis_driver_version = __constant_cpu_to_le32 (1);

/* Function Prototypes */
static rndis_resp_t *rndis_add_response (int configNr, u32 length);


/* supported OIDs */
static const u32 oid_supported_list [] =
{
	/* the general stuff */
	OID_GEN_SUPPORTED_LIST,
	OID_GEN_HARDWARE_STATUS,
	OID_GEN_MEDIA_SUPPORTED,
	OID_GEN_MEDIA_IN_USE,
	OID_GEN_MAXIMUM_FRAME_SIZE,
	OID_GEN_LINK_SPEED,
	OID_GEN_TRANSMIT_BLOCK_SIZE,
	OID_GEN_RECEIVE_BLOCK_SIZE,
	OID_GEN_VENDOR_ID,
	OID_GEN_VENDOR_DESCRIPTION,
	OID_GEN_VENDOR_DRIVER_VERSION,
	OID_GEN_CURRENT_PACKET_FILTER,
	OID_GEN_MAXIMUM_TOTAL_SIZE,
	OID_GEN_MEDIA_CONNECT_STATUS,
	OID_GEN_PHYSICAL_MEDIUM,

	/* the statistical stuff */
	OID_GEN_XMIT_OK,
	OID_GEN_RCV_OK,
	OID_GEN_XMIT_ERROR,
	OID_GEN_RCV_ERROR,
	OID_GEN_RCV_NO_BUFFER,

	/* mandatory 802.3 */
	/* the general stuff */
	OID_802_3_PERMANENT_ADDRESS,
	OID_802_3_CURRENT_ADDRESS,
	OID_802_3_MULTICAST_LIST,
	OID_802_3_MAC_OPTIONS,
	OID_802_3_MAXIMUM_LIST_SIZE,

	/* the statistical stuff */
	OID_802_3_RCV_ERROR_ALIGNMENT,
	OID_802_3_XMIT_ONE_COLLISION,
	OID_802_3_XMIT_MORE_COLLISIONS,

};


/* NDIS Functions */
static int
gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
		rndis_resp_t *r)
{
	int			retval = -ENOTSUPP;
	u32			length = 4;	/* usually */
	__le32			*outbuf;
	int			i, count;
	rndis_query_cmplt_type	*resp;

	if (!r) return -ENOMEM;
	resp = (rndis_query_cmplt_type *) r->buf;

	if (!resp) return -ENOMEM;

	if (buf_len && rndis_debug > 1) {
		DEBUG("query OID %08x value, len %d:\n", OID, buf_len);
		for (i = 0; i < buf_len; i += 16) {
			DEBUG ("%03d: %08x %08x %08x %08x\n", i,
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 4])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 8])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 12])));
		}
	}

	/* response goes here, right after the header */
	outbuf = (__le32 *) &resp[1];
	resp->InformationBufferOffset = __constant_cpu_to_le32 (16);

	switch (OID) {

	/* general oids (table 4-1) */

	/* mandatory */
	case OID_GEN_SUPPORTED_LIST:
		DEBUG ("%s: OID_GEN_SUPPORTED_LIST\n", __FUNCTION__);
		length = sizeof (oid_supported_list);
		count  = length / sizeof (u32);
		for (i = 0; i < count; i++)
			outbuf[i] = cpu_to_le32 (oid_supported_list[i]);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_HARDWARE_STATUS:
		DEBUG("%s: OID_GEN_HARDWARE_STATUS\n", __FUNCTION__);
		/* Bogus question!
		 * Hardware must be ready to receive high level protocols.
		 * BTW:
		 * reddite ergo quae sunt Caesaris Caesari
		 * et quae sunt Dei Deo!
		 */
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_MEDIA_SUPPORTED:
		DEBUG("%s: OID_GEN_MEDIA_SUPPORTED\n", __FUNCTION__);
		*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_MEDIA_IN_USE:
		DEBUG("%s: OID_GEN_MEDIA_IN_USE\n", __FUNCTION__);
		/* one medium, one transport... (maybe you do it better) */
		*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_MAXIMUM_FRAME_SIZE:
		DEBUG("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			*outbuf = cpu_to_le32 (
				rndis_per_dev_params [configNr].dev->mtu);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_LINK_SPEED:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_LINK_SPEED\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].media_state
				== NDIS_MEDIA_STATE_DISCONNECTED)
			*outbuf = __constant_cpu_to_le32 (0);
		else
			*outbuf = cpu_to_le32 (
				rndis_per_dev_params [configNr].speed);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_TRANSMIT_BLOCK_SIZE:
		DEBUG("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			*outbuf = cpu_to_le32 (
				rndis_per_dev_params [configNr].dev->mtu);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_RECEIVE_BLOCK_SIZE:
		DEBUG("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			*outbuf = cpu_to_le32 (
				rndis_per_dev_params [configNr].dev->mtu);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_VENDOR_ID:
		DEBUG("%s: OID_GEN_VENDOR_ID\n", __FUNCTION__);
		*outbuf = cpu_to_le32 (
			rndis_per_dev_params [configNr].vendorID);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_VENDOR_DESCRIPTION:
		DEBUG("%s: OID_GEN_VENDOR_DESCRIPTION\n", __FUNCTION__);
		length = strlen (rndis_per_dev_params [configNr].vendorDescr);
		memcpy (outbuf,
			rndis_per_dev_params [configNr].vendorDescr, length);
		retval = 0;
		break;

	case OID_GEN_VENDOR_DRIVER_VERSION:
		DEBUG("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __FUNCTION__);
		/* Created as LE */
		*outbuf = rndis_driver_version;
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_CURRENT_PACKET_FILTER:
		DEBUG("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __FUNCTION__);
		*outbuf = cpu_to_le32 (*rndis_per_dev_params[configNr].filter);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_MAXIMUM_TOTAL_SIZE:
		DEBUG("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
		retval = 0;
		break;

	/* mandatory */
	case OID_GEN_MEDIA_CONNECT_STATUS:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __FUNCTION__);
		*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
						.media_state);
		retval = 0;
		break;

	case OID_GEN_PHYSICAL_MEDIUM:
		DEBUG("%s: OID_GEN_PHYSICAL_MEDIUM\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;

	/* The RNDIS specification is incomplete/wrong.   Some versions
	 * of MS-Windows expect OIDs that aren't specified there.  Other
	 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
	 */
	case OID_GEN_MAC_OPTIONS:		/* from WinME */
		DEBUG("%s: OID_GEN_MAC_OPTIONS\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32(
			  NDIS_MAC_OPTION_RECEIVE_SERIALIZED
			| NDIS_MAC_OPTION_FULL_DUPLEX);
		retval = 0;
		break;

	/* statistics OIDs (table 4-2) */

	/* mandatory */
	case OID_GEN_XMIT_OK:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_XMIT_OK\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (
			    rndis_per_dev_params [configNr].stats->tx_packets -
			    rndis_per_dev_params [configNr].stats->tx_errors -
			    rndis_per_dev_params [configNr].stats->tx_dropped);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_RCV_OK:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_RCV_OK\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (
			    rndis_per_dev_params [configNr].stats->rx_packets -
			    rndis_per_dev_params [configNr].stats->rx_errors -
			    rndis_per_dev_params [configNr].stats->rx_dropped);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_XMIT_ERROR:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_XMIT_ERROR\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->tx_errors);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_RCV_ERROR:
		if (rndis_debug > 1)
			DEBUG("%s: OID_GEN_RCV_ERROR\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_errors);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_GEN_RCV_NO_BUFFER:
		DEBUG("%s: OID_GEN_RCV_NO_BUFFER\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_dropped);
			retval = 0;
		}
		break;


	/* ieee802.3 OIDs (table 4-3) */

	/* mandatory */
	case OID_802_3_PERMANENT_ADDRESS:
		DEBUG("%s: OID_802_3_PERMANENT_ADDRESS\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			length = ETH_ALEN;
			memcpy (outbuf,
				rndis_per_dev_params [configNr].host_mac,
				length);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_802_3_CURRENT_ADDRESS:
		DEBUG("%s: OID_802_3_CURRENT_ADDRESS\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			length = ETH_ALEN;
			memcpy (outbuf,
				rndis_per_dev_params [configNr].host_mac,
				length);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_802_3_MULTICAST_LIST:
		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
		/* Multicast base address only */
		*outbuf = __constant_cpu_to_le32 (0xE0000000);
		retval = 0;
		break;

	/* mandatory */
	case OID_802_3_MAXIMUM_LIST_SIZE:
		DEBUG("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __FUNCTION__);
		/* Multicast base address only */
		*outbuf = __constant_cpu_to_le32 (1);
		retval = 0;
		break;

	case OID_802_3_MAC_OPTIONS:
		DEBUG("%s: OID_802_3_MAC_OPTIONS\n", __FUNCTION__);
		break;

	/* ieee802.3 statistics OIDs (table 4-4) */

	/* mandatory */
	case OID_802_3_RCV_ERROR_ALIGNMENT:
		DEBUG("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_frame_errors);
			retval = 0;
		}
		break;

	/* mandatory */
	case OID_802_3_XMIT_ONE_COLLISION:
		DEBUG("%s: OID_802_3_XMIT_ONE_COLLISION\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;

	/* mandatory */
	case OID_802_3_XMIT_MORE_COLLISIONS:
		DEBUG("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;



	default:
		printk (KERN_WARNING "%s: query unknown OID 0x%08X\n",
			 __FUNCTION__, OID);
	}
	if (retval < 0)
		length = 0;

	resp->InformationBufferLength = cpu_to_le32 (length);
	r->length = length + sizeof *resp;
	resp->MessageLength = cpu_to_le32 (r->length);
	return retval;
}

static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len,
			rndis_resp_t *r)
{
	rndis_set_cmplt_type		*resp;
	int				i, retval = -ENOTSUPP;
	struct rndis_params		*params;

	if (!r)
		return -ENOMEM;
	resp = (rndis_set_cmplt_type *) r->buf;
	if (!resp)
		return -ENOMEM;

	if (buf_len && rndis_debug > 1) {
		DEBUG("set OID %08x value, len %d:\n", OID, buf_len);
		for (i = 0; i < buf_len; i += 16) {
			DEBUG ("%03d: %08x %08x %08x %08x\n", i,
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 4])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 8])),
				le32_to_cpu(get_unaligned((__le32 *)
					&buf[i + 12])));
		}
	}

	params = &rndis_per_dev_params [configNr];
	switch (OID) {
	case OID_GEN_CURRENT_PACKET_FILTER:

		/* these NDIS_PACKET_TYPE_* bitflags are shared with
		 * 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
		 */
		*params->filter = (u16) le32_to_cpu(get_unaligned(
				(__le32 *)buf));
		DEBUG("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
			__FUNCTION__, *params->filter);

		/* this call has a significant side effect:  it's
		 * what makes the packet flow start and stop, like
		 * activating the CDC Ethernet altsetting.
		 */
		retval = 0;
		if (*params->filter) {
			params->state = RNDIS_DATA_INITIALIZED;
			netif_carrier_on(params->dev);
			if (netif_running(params->dev))
				netif_wake_queue (params->dev);
		} else {
			params->state = RNDIS_INITIALIZED;
			netif_carrier_off (params->dev);
			netif_stop_queue (params->dev);
		}
		break;

	case OID_802_3_MULTICAST_LIST:
		/* I think we can ignore this */
		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
		retval = 0;
		break;


	default:
		printk (KERN_WARNING "%s: set unknown OID 0x%08X, size %d\n",