// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/highmem.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/nls.h>
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#include <linux/vmalloc.h>
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#include <linux/rtnetlink.h>
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#include <linux/ucs2_string.h>
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#include "hyperv_net.h"
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#include "netvsc_trace.h"
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static void rndis_set_multicast(struct work_struct *w);
|
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#define RNDIS_EXT_LEN HV_HYP_PAGE_SIZE
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struct rndis_request {
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struct list_head list_ent;
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struct completion wait_event;
|
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struct rndis_message response_msg;
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/*
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* The buffer for extended info after the RNDIS response message. It's
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* referenced based on the data offset in the RNDIS message. Its size
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* is enough for current needs, and should be sufficient for the near
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* future.
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*/
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u8 response_ext[RNDIS_EXT_LEN];
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/* Simplify allocation by having a netvsc packet inline */
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struct hv_netvsc_packet pkt;
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struct rndis_message request_msg;
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/*
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* The buffer for the extended info after the RNDIS request message.
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* It is referenced and sized in a similar way as response_ext.
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*/
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u8 request_ext[RNDIS_EXT_LEN];
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};
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static const u8 netvsc_hash_key[NETVSC_HASH_KEYLEN] = {
|
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
|
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
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0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
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0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
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0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
|
};
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|
static struct rndis_device *get_rndis_device(void)
|
{
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struct rndis_device *device;
|
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device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
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if (!device)
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return NULL;
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|
spin_lock_init(&device->request_lock);
|
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INIT_LIST_HEAD(&device->req_list);
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INIT_WORK(&device->mcast_work, rndis_set_multicast);
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|
device->state = RNDIS_DEV_UNINITIALIZED;
|
|
return device;
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}
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|
static struct rndis_request *get_rndis_request(struct rndis_device *dev,
|
u32 msg_type,
|
u32 msg_len)
|
{
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struct rndis_request *request;
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struct rndis_message *rndis_msg;
|
struct rndis_set_request *set;
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unsigned long flags;
|
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request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
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if (!request)
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return NULL;
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init_completion(&request->wait_event);
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rndis_msg = &request->request_msg;
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rndis_msg->ndis_msg_type = msg_type;
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rndis_msg->msg_len = msg_len;
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request->pkt.q_idx = 0;
|
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/*
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* Set the request id. This field is always after the rndis header for
|
* request/response packet types so we just used the SetRequest as a
|
* template
|
*/
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set = &rndis_msg->msg.set_req;
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set->req_id = atomic_inc_return(&dev->new_req_id);
|
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/* Add to the request list */
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spin_lock_irqsave(&dev->request_lock, flags);
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list_add_tail(&request->list_ent, &dev->req_list);
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spin_unlock_irqrestore(&dev->request_lock, flags);
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return request;
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}
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static void put_rndis_request(struct rndis_device *dev,
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struct rndis_request *req)
|
{
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unsigned long flags;
|
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spin_lock_irqsave(&dev->request_lock, flags);
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list_del(&req->list_ent);
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spin_unlock_irqrestore(&dev->request_lock, flags);
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kfree(req);
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}
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static void dump_rndis_message(struct net_device *netdev,
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const struct rndis_message *rndis_msg)
|
{
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switch (rndis_msg->ndis_msg_type) {
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case RNDIS_MSG_PACKET:
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netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
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"data offset %u data len %u, # oob %u, "
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"oob offset %u, oob len %u, pkt offset %u, "
|
"pkt len %u\n",
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rndis_msg->msg_len,
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rndis_msg->msg.pkt.data_offset,
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rndis_msg->msg.pkt.data_len,
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rndis_msg->msg.pkt.num_oob_data_elements,
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rndis_msg->msg.pkt.oob_data_offset,
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rndis_msg->msg.pkt.oob_data_len,
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rndis_msg->msg.pkt.per_pkt_info_offset,
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rndis_msg->msg.pkt.per_pkt_info_len);
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break;
|
|
case RNDIS_MSG_INIT_C:
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netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
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"(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
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"device flags %d, max xfer size 0x%x, max pkts %u, "
|
"pkt aligned %u)\n",
|
rndis_msg->msg_len,
|
rndis_msg->msg.init_complete.req_id,
|
rndis_msg->msg.init_complete.status,
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rndis_msg->msg.init_complete.major_ver,
|
rndis_msg->msg.init_complete.minor_ver,
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rndis_msg->msg.init_complete.dev_flags,
|
rndis_msg->msg.init_complete.max_xfer_size,
|
rndis_msg->msg.init_complete.
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max_pkt_per_msg,
|
rndis_msg->msg.init_complete.
|
pkt_alignment_factor);
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break;
|
|
case RNDIS_MSG_QUERY_C:
|
netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
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"(len %u, id 0x%x, status 0x%x, buf len %u, "
|
"buf offset %u)\n",
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rndis_msg->msg_len,
|
rndis_msg->msg.query_complete.req_id,
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rndis_msg->msg.query_complete.status,
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rndis_msg->msg.query_complete.
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info_buflen,
|
rndis_msg->msg.query_complete.
|
info_buf_offset);
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break;
|
|
case RNDIS_MSG_SET_C:
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netdev_dbg(netdev,
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"RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
|
rndis_msg->msg_len,
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rndis_msg->msg.set_complete.req_id,
|
rndis_msg->msg.set_complete.status);
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break;
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case RNDIS_MSG_INDICATE:
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netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
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"(len %u, status 0x%x, buf len %u, buf offset %u)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.indicate_status.status,
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rndis_msg->msg.indicate_status.status_buflen,
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rndis_msg->msg.indicate_status.status_buf_offset);
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break;
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default:
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netdev_dbg(netdev, "0x%x (len %u)\n",
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rndis_msg->ndis_msg_type,
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rndis_msg->msg_len);
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break;
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}
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}
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static int rndis_filter_send_request(struct rndis_device *dev,
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struct rndis_request *req)
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{
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struct hv_netvsc_packet *packet;
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struct hv_page_buffer page_buf[2];
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struct hv_page_buffer *pb = page_buf;
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int ret;
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/* Setup the packet to send it */
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packet = &req->pkt;
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packet->total_data_buflen = req->request_msg.msg_len;
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packet->page_buf_cnt = 1;
|
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pb[0].pfn = virt_to_phys(&req->request_msg) >>
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HV_HYP_PAGE_SHIFT;
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pb[0].len = req->request_msg.msg_len;
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pb[0].offset = offset_in_hvpage(&req->request_msg);
|
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/* Add one page_buf when request_msg crossing page boundary */
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if (pb[0].offset + pb[0].len > HV_HYP_PAGE_SIZE) {
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packet->page_buf_cnt++;
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pb[0].len = HV_HYP_PAGE_SIZE -
|
pb[0].offset;
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pb[1].pfn = virt_to_phys((void *)&req->request_msg
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+ pb[0].len) >> HV_HYP_PAGE_SHIFT;
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pb[1].offset = 0;
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pb[1].len = req->request_msg.msg_len -
|
pb[0].len;
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}
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trace_rndis_send(dev->ndev, 0, &req->request_msg);
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|
rcu_read_lock_bh();
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ret = netvsc_send(dev->ndev, packet, NULL, pb, NULL, false);
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rcu_read_unlock_bh();
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return ret;
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}
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static void rndis_set_link_state(struct rndis_device *rdev,
|
struct rndis_request *request)
|
{
|
u32 link_status;
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struct rndis_query_complete *query_complete;
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query_complete = &request->response_msg.msg.query_complete;
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if (query_complete->status == RNDIS_STATUS_SUCCESS &&
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query_complete->info_buflen == sizeof(u32)) {
|
memcpy(&link_status, (void *)((unsigned long)query_complete +
|
query_complete->info_buf_offset), sizeof(u32));
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rdev->link_state = link_status != 0;
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}
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}
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static void rndis_filter_receive_response(struct net_device *ndev,
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struct netvsc_device *nvdev,
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const struct rndis_message *resp)
|
{
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struct rndis_device *dev = nvdev->extension;
|
struct rndis_request *request = NULL;
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bool found = false;
|
unsigned long flags;
|
|
/* This should never happen, it means control message
|
* response received after device removed.
|
*/
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if (dev->state == RNDIS_DEV_UNINITIALIZED) {
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netdev_err(ndev,
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"got rndis message uninitialized\n");
|
return;
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}
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/* Ensure the packet is big enough to read req_id. Req_id is the 1st
|
* field in any request/response message, so the payload should have at
|
* least sizeof(u32) bytes
|
*/
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if (resp->msg_len - RNDIS_HEADER_SIZE < sizeof(u32)) {
|
netdev_err(ndev, "rndis msg_len too small: %u\n",
|
resp->msg_len);
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return;
|
}
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spin_lock_irqsave(&dev->request_lock, flags);
|
list_for_each_entry(request, &dev->req_list, list_ent) {
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/*
|
* All request/response message contains RequestId as the 1st
|
* field
|
*/
|
if (request->request_msg.msg.init_req.req_id
|
== resp->msg.init_complete.req_id) {
|
found = true;
|
break;
|
}
|
}
|
spin_unlock_irqrestore(&dev->request_lock, flags);
|
|
if (found) {
|
if (resp->msg_len <=
|
sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
|
memcpy(&request->response_msg, resp,
|
resp->msg_len);
|
if (request->request_msg.ndis_msg_type ==
|
RNDIS_MSG_QUERY && request->request_msg.msg.
|
query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
|
rndis_set_link_state(dev, request);
|
} else {
|
netdev_err(ndev,
|
"rndis response buffer overflow "
|
"detected (size %u max %zu)\n",
|
resp->msg_len,
|
sizeof(struct rndis_message));
|
|
if (resp->ndis_msg_type ==
|
RNDIS_MSG_RESET_C) {
|
/* does not have a request id field */
|
request->response_msg.msg.reset_complete.
|
status = RNDIS_STATUS_BUFFER_OVERFLOW;
|
} else {
|
request->response_msg.msg.
|
init_complete.status =
|
RNDIS_STATUS_BUFFER_OVERFLOW;
|
}
|
}
|
|
complete(&request->wait_event);
|
} else {
|
netdev_err(ndev,
|
"no rndis request found for this response "
|
"(id 0x%x res type 0x%x)\n",
|
resp->msg.init_complete.req_id,
|
resp->ndis_msg_type);
|
}
|
}
|
|
/*
|
* Get the Per-Packet-Info with the specified type
|
* return NULL if not found.
|
*/
|
static inline void *rndis_get_ppi(struct net_device *ndev,
|
struct rndis_packet *rpkt,
|
u32 rpkt_len, u32 type, u8 internal)
|
{
|
struct rndis_per_packet_info *ppi;
|
int len;
|
|
if (rpkt->per_pkt_info_offset == 0)
|
return NULL;
|
|
/* Validate info_offset and info_len */
|
if (rpkt->per_pkt_info_offset < sizeof(struct rndis_packet) ||
|
rpkt->per_pkt_info_offset > rpkt_len) {
|
netdev_err(ndev, "Invalid per_pkt_info_offset: %u\n",
|
rpkt->per_pkt_info_offset);
|
return NULL;
|
}
|
|
if (rpkt->per_pkt_info_len > rpkt_len - rpkt->per_pkt_info_offset) {
|
netdev_err(ndev, "Invalid per_pkt_info_len: %u\n",
|
rpkt->per_pkt_info_len);
|
return NULL;
|
}
|
|
ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
|
rpkt->per_pkt_info_offset);
|
len = rpkt->per_pkt_info_len;
|
|
while (len > 0) {
|
/* Validate ppi_offset and ppi_size */
|
if (ppi->size > len) {
|
netdev_err(ndev, "Invalid ppi size: %u\n", ppi->size);
|
continue;
|
}
|
|
if (ppi->ppi_offset >= ppi->size) {
|
netdev_err(ndev, "Invalid ppi_offset: %u\n", ppi->ppi_offset);
|
continue;
|
}
|
|
if (ppi->type == type && ppi->internal == internal)
|
return (void *)((ulong)ppi + ppi->ppi_offset);
|
len -= ppi->size;
|
ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
|
}
|
|
return NULL;
|
}
|
|
static inline
|
void rsc_add_data(struct netvsc_channel *nvchan,
|
const struct ndis_pkt_8021q_info *vlan,
|
const struct ndis_tcp_ip_checksum_info *csum_info,
|
const u32 *hash_info,
|
void *data, u32 len)
|
{
|
u32 cnt = nvchan->rsc.cnt;
|
|
if (cnt) {
|
nvchan->rsc.pktlen += len;
|
} else {
|
nvchan->rsc.vlan = vlan;
|
nvchan->rsc.csum_info = csum_info;
|
nvchan->rsc.pktlen = len;
|
nvchan->rsc.hash_info = hash_info;
|
}
|
|
nvchan->rsc.data[cnt] = data;
|
nvchan->rsc.len[cnt] = len;
|
nvchan->rsc.cnt++;
|
}
|
|
static int rndis_filter_receive_data(struct net_device *ndev,
|
struct netvsc_device *nvdev,
|
struct netvsc_channel *nvchan,
|
struct rndis_message *msg,
|
u32 data_buflen)
|
{
|
struct rndis_packet *rndis_pkt = &msg->msg.pkt;
|
const struct ndis_tcp_ip_checksum_info *csum_info;
|
const struct ndis_pkt_8021q_info *vlan;
|
const struct rndis_pktinfo_id *pktinfo_id;
|
const u32 *hash_info;
|
u32 data_offset, rpkt_len;
|
void *data;
|
bool rsc_more = false;
|
int ret;
|
|
/* Ensure data_buflen is big enough to read header fields */
|
if (data_buflen < RNDIS_HEADER_SIZE + sizeof(struct rndis_packet)) {
|
netdev_err(ndev, "invalid rndis pkt, data_buflen too small: %u\n",
|
data_buflen);
|
return NVSP_STAT_FAIL;
|
}
|
|
/* Validate rndis_pkt offset */
|
if (rndis_pkt->data_offset >= data_buflen - RNDIS_HEADER_SIZE) {
|
netdev_err(ndev, "invalid rndis packet offset: %u\n",
|
rndis_pkt->data_offset);
|
return NVSP_STAT_FAIL;
|
}
|
|
/* Remove the rndis header and pass it back up the stack */
|
data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
|
|
rpkt_len = data_buflen - RNDIS_HEADER_SIZE;
|
data_buflen -= data_offset;
|
|
/*
|
* Make sure we got a valid RNDIS message, now total_data_buflen
|
* should be the data packet size plus the trailer padding size
|
*/
|
if (unlikely(data_buflen < rndis_pkt->data_len)) {
|
netdev_err(ndev, "rndis message buffer "
|
"overflow detected (got %u, min %u)"
|
"...dropping this message!\n",
|
data_buflen, rndis_pkt->data_len);
|
return NVSP_STAT_FAIL;
|
}
|
|
vlan = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, IEEE_8021Q_INFO, 0);
|
|
csum_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, TCPIP_CHKSUM_PKTINFO, 0);
|
|
hash_info = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, NBL_HASH_VALUE, 0);
|
|
pktinfo_id = rndis_get_ppi(ndev, rndis_pkt, rpkt_len, RNDIS_PKTINFO_ID, 1);
|
|
data = (void *)msg + data_offset;
|
|
/* Identify RSC frags, drop erroneous packets */
|
if (pktinfo_id && (pktinfo_id->flag & RNDIS_PKTINFO_SUBALLOC)) {
|
if (pktinfo_id->flag & RNDIS_PKTINFO_1ST_FRAG)
|
nvchan->rsc.cnt = 0;
|
else if (nvchan->rsc.cnt == 0)
|
goto drop;
|
|
rsc_more = true;
|
|
if (pktinfo_id->flag & RNDIS_PKTINFO_LAST_FRAG)
|
rsc_more = false;
|
|
if (rsc_more && nvchan->rsc.is_last)
|
goto drop;
|
} else {
|
nvchan->rsc.cnt = 0;
|
}
|
|
if (unlikely(nvchan->rsc.cnt >= NVSP_RSC_MAX))
|
goto drop;
|
|
/* Put data into per channel structure.
|
* Also, remove the rndis trailer padding from rndis packet message
|
* rndis_pkt->data_len tell us the real data length, we only copy
|
* the data packet to the stack, without the rndis trailer padding
|
*/
|
rsc_add_data(nvchan, vlan, csum_info, hash_info,
|
data, rndis_pkt->data_len);
|
|
if (rsc_more)
|
return NVSP_STAT_SUCCESS;
|
|
ret = netvsc_recv_callback(ndev, nvdev, nvchan);
|
nvchan->rsc.cnt = 0;
|
|
return ret;
|
|
drop:
|
return NVSP_STAT_FAIL;
|
}
|
|
int rndis_filter_receive(struct net_device *ndev,
|
struct netvsc_device *net_dev,
|
struct netvsc_channel *nvchan,
|
void *data, u32 buflen)
|
{
|
struct net_device_context *net_device_ctx = netdev_priv(ndev);
|
struct rndis_message *rndis_msg = data;
|
|
if (netif_msg_rx_status(net_device_ctx))
|
dump_rndis_message(ndev, rndis_msg);
|
|
/* Validate incoming rndis_message packet */
|
if (buflen < RNDIS_HEADER_SIZE || rndis_msg->msg_len < RNDIS_HEADER_SIZE ||
|
buflen < rndis_msg->msg_len) {
|
netdev_err(ndev, "Invalid rndis_msg (buflen: %u, msg_len: %u)\n",
|
buflen, rndis_msg->msg_len);
|
return NVSP_STAT_FAIL;
|
}
|
|
switch (rndis_msg->ndis_msg_type) {
|
case RNDIS_MSG_PACKET:
|
return rndis_filter_receive_data(ndev, net_dev, nvchan,
|
rndis_msg, buflen);
|
case RNDIS_MSG_INIT_C:
|
case RNDIS_MSG_QUERY_C:
|
case RNDIS_MSG_SET_C:
|
/* completion msgs */
|
rndis_filter_receive_response(ndev, net_dev, rndis_msg);
|
break;
|
|
case RNDIS_MSG_INDICATE:
|
/* notification msgs */
|
netvsc_linkstatus_callback(ndev, rndis_msg);
|
break;
|
default:
|
netdev_err(ndev,
|
"unhandled rndis message (type %u len %u)\n",
|
rndis_msg->ndis_msg_type,
|
rndis_msg->msg_len);
|
return NVSP_STAT_FAIL;
|
}
|
|
return NVSP_STAT_SUCCESS;
|
}
|
|
static int rndis_filter_query_device(struct rndis_device *dev,
|
struct netvsc_device *nvdev,
|
u32 oid, void *result, u32 *result_size)
|
{
|
struct rndis_request *request;
|
u32 inresult_size = *result_size;
|
struct rndis_query_request *query;
|
struct rndis_query_complete *query_complete;
|
int ret = 0;
|
|
if (!result)
|
return -EINVAL;
|
|
*result_size = 0;
|
request = get_rndis_request(dev, RNDIS_MSG_QUERY,
|
RNDIS_MESSAGE_SIZE(struct rndis_query_request));
|
if (!request) {
|
ret = -ENOMEM;
|
goto cleanup;
|
}
|
|
/* Setup the rndis query */
|
query = &request->request_msg.msg.query_req;
|
query->oid = oid;
|
query->info_buf_offset = sizeof(struct rndis_query_request);
|
query->info_buflen = 0;
|
query->dev_vc_handle = 0;
|
|
if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) {
|
struct ndis_offload *hwcaps;
|
u32 nvsp_version = nvdev->nvsp_version;
|
u8 ndis_rev;
|
size_t size;
|
|
if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) {
|
ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
|
size = NDIS_OFFLOAD_SIZE;
|
} else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) {
|
ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2;
|
size = NDIS_OFFLOAD_SIZE_6_1;
|
} else {
|
ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1;
|
size = NDIS_OFFLOAD_SIZE_6_0;
|
}
|
|
request->request_msg.msg_len += size;
|
query->info_buflen = size;
|
hwcaps = (struct ndis_offload *)
|
((unsigned long)query + query->info_buf_offset);
|
|
hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD;
|
hwcaps->header.revision = ndis_rev;
|
hwcaps->header.size = size;
|
|
} else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) {
|
struct ndis_recv_scale_cap *cap;
|
|
request->request_msg.msg_len +=
|
sizeof(struct ndis_recv_scale_cap);
|
query->info_buflen = sizeof(struct ndis_recv_scale_cap);
|
cap = (struct ndis_recv_scale_cap *)((unsigned long)query +
|
query->info_buf_offset);
|
cap->hdr.type = NDIS_OBJECT_TYPE_RSS_CAPABILITIES;
|
cap->hdr.rev = NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2;
|
cap->hdr.size = sizeof(struct ndis_recv_scale_cap);
|
}
|
|
ret = rndis_filter_send_request(dev, request);
|
if (ret != 0)
|
goto cleanup;
|
|
wait_for_completion(&request->wait_event);
|
|
/* Copy the response back */
|
query_complete = &request->response_msg.msg.query_complete;
|
|
if (query_complete->info_buflen > inresult_size) {
|
ret = -1;
|
goto cleanup;
|
}
|
|
memcpy(result,
|
(void *)((unsigned long)query_complete +
|
query_complete->info_buf_offset),
|
query_complete->info_buflen);
|
|
*result_size = query_complete->info_buflen;
|
|
cleanup:
|
if (request)
|
put_rndis_request(dev, request);
|
|
return ret;
|
}
|
|
/* Get the hardware offload capabilities */
|
static int
|
rndis_query_hwcaps(struct rndis_device *dev, struct netvsc_device *net_device,
|
struct ndis_offload *caps)
|
{
|
u32 caps_len = sizeof(*caps);
|
int ret;
|
|
memset(caps, 0, sizeof(*caps));
|
|
ret = rndis_filter_query_device(dev, net_device,
|
OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES,
|
caps, &caps_len);
|
if (ret)
|
return ret;
|
|
if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) {
|
netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n",
|
caps->header.type);
|
return -EINVAL;
|
}
|
|
if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) {
|
netdev_warn(dev->ndev, "invalid NDIS objrev %x\n",
|
caps->header.revision);
|
return -EINVAL;
|
}
|
|
if (caps->header.size > caps_len ||
|
caps->header.size < NDIS_OFFLOAD_SIZE_6_0) {
|
netdev_warn(dev->ndev,
|
"invalid NDIS objsize %u, data size %u\n",
|
caps->header.size, caps_len);
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
static int rndis_filter_query_device_mac(struct rndis_device *dev,
|
struct netvsc_device *net_device)
|
{
|
u32 size = ETH_ALEN;
|
|
return rndis_filter_query_device(dev, net_device,
|
RNDIS_OID_802_3_PERMANENT_ADDRESS,
|
dev->hw_mac_adr, &size);
|
}
|
|
#define NWADR_STR "NetworkAddress"
|
#define NWADR_STRLEN 14
|
|
int rndis_filter_set_device_mac(struct netvsc_device *nvdev,
|
const char *mac)
|
{
|
struct rndis_device *rdev = nvdev->extension;
|
struct rndis_request *request;
|
struct rndis_set_request *set;
|
struct rndis_config_parameter_info *cpi;
|
wchar_t *cfg_nwadr, *cfg_mac;
|
struct rndis_set_complete *set_complete;
|
char macstr[2*ETH_ALEN+1];
|
u32 extlen = sizeof(struct rndis_config_parameter_info) +
|
2*NWADR_STRLEN + 4*ETH_ALEN;
|
int ret;
|
|
request = get_rndis_request(rdev, RNDIS_MSG_SET,
|
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
|
if (!request)
|
return -ENOMEM;
|
|
set = &request->request_msg.msg.set_req;
|
set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
|
set->info_buflen = extlen;
|
set->info_buf_offset = sizeof(struct rndis_set_request);
|
set->dev_vc_handle = 0;
|
|
cpi = (struct rndis_config_parameter_info *)((ulong)set +
|
set->info_buf_offset);
|
cpi->parameter_name_offset =
|
sizeof(struct rndis_config_parameter_info);
|
/* Multiply by 2 because host needs 2 bytes (utf16) for each char */
|
cpi->parameter_name_length = 2*NWADR_STRLEN;
|
cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
|
cpi->parameter_value_offset =
|
cpi->parameter_name_offset + cpi->parameter_name_length;
|
/* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
|
cpi->parameter_value_length = 4*ETH_ALEN;
|
|
cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
|
cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
|
ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
|
cfg_nwadr, NWADR_STRLEN);
|
if (ret < 0)
|
goto cleanup;
|
snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
|
ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
|
cfg_mac, 2*ETH_ALEN);
|
if (ret < 0)
|
goto cleanup;
|
|
ret = rndis_filter_send_request(rdev, request);
|
if (ret != 0)
|
goto cleanup;
|
|
wait_for_completion(&request->wait_event);
|
|
set_complete = &request->response_msg.msg.set_complete;
|
if (set_complete->status != RNDIS_STATUS_SUCCESS)
|
ret = -EIO;
|
|
cleanup:
|
put_rndis_request(rdev, request);
|
return ret;
|
}
|
|
int
|
rndis_filter_set_offload_params(struct net_device *ndev,
|
struct netvsc_device *nvdev,
|
struct ndis_offload_params *req_offloads)
|
{
|
struct rndis_device *rdev = nvdev->extension;
|
struct rndis_request *request;
|
struct rndis_set_request *set;
|
struct ndis_offload_params *offload_params;
|
struct rndis_set_complete *set_complete;
|
u32 extlen = sizeof(struct ndis_offload_params);
|
int ret;
|
u32 vsp_version = nvdev->nvsp_version;
|
|
if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
|
extlen = VERSION_4_OFFLOAD_SIZE;
|
/* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
|
* UDP checksum offload.
|
*/
|
req_offloads->udp_ip_v4_csum = 0;
|
req_offloads->udp_ip_v6_csum = 0;
|
}
|
|
request = get_rndis_request(rdev, RNDIS_MSG_SET,
|
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
|
if (!request)
|
return -ENOMEM;
|
|
set = &request->request_msg.msg.set_req;
|
set->oid = OID_TCP_OFFLOAD_PARAMETERS;
|
set->info_buflen = extlen;
|
set->info_buf_offset = sizeof(struct rndis_set_request);
|
set->dev_vc_handle = 0;
|
|
offload_params = (struct ndis_offload_params *)((ulong)set +
|
set->info_buf_offset);
|
*offload_params = *req_offloads;
|
offload_params->header.type = NDIS_OBJECT_TYPE_DEFAULT;
|
offload_params->header.revision = NDIS_OFFLOAD_PARAMETERS_REVISION_3;
|
offload_params->header.size = extlen;
|
|
ret = rndis_filter_send_request(rdev, request);
|
if (ret != 0)
|
goto cleanup;
|
|
wait_for_completion(&request->wait_event);
|
set_complete = &request->response_msg.msg.set_complete;
|
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
|
netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
|
set_complete->status);
|
ret = -EINVAL;
|
}
|
|
cleanup:
|
put_rndis_request(rdev, request);
|
return ret;
|
}
|
|
static int rndis_set_rss_param_msg(struct rndis_device *rdev,
|
const u8 *rss_key, u16 flag)
|
{
|
struct net_device *ndev = rdev->ndev;
|
struct net_device_context *ndc = netdev_priv(ndev);
|
struct rndis_request *request;
|
struct rndis_set_request *set;
|
struct rndis_set_complete *set_complete;
|
u32 extlen = sizeof(struct ndis_recv_scale_param) +
|
4 * ITAB_NUM + NETVSC_HASH_KEYLEN;
|
struct ndis_recv_scale_param *rssp;
|
u32 *itab;
|
u8 *keyp;
|
int i, ret;
|
|
request = get_rndis_request(
|
rdev, RNDIS_MSG_SET,
|
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
|
if (!request)
|
return -ENOMEM;
|
|
set = &request->request_msg.msg.set_req;
|
set->oid = OID_GEN_RECEIVE_SCALE_PARAMETERS;
|
set->info_buflen = extlen;
|
set->info_buf_offset = sizeof(struct rndis_set_request);
|
set->dev_vc_handle = 0;
|
|
rssp = (struct ndis_recv_scale_param *)(set + 1);
|
rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
|
rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
|
rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
|
rssp->flag = flag;
|
rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
|
NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
|
NDIS_HASH_TCP_IPV6;
|
rssp->indirect_tabsize = 4*ITAB_NUM;
|
rssp->indirect_taboffset = sizeof(struct ndis_recv_scale_param);
|
rssp->hashkey_size = NETVSC_HASH_KEYLEN;
|
rssp->hashkey_offset = rssp->indirect_taboffset +
|
rssp->indirect_tabsize;
|
|
/* Set indirection table entries */
|
itab = (u32 *)(rssp + 1);
|
for (i = 0; i < ITAB_NUM; i++)
|
itab[i] = ndc->rx_table[i];
|
|
/* Set hask key values */
|
keyp = (u8 *)((unsigned long)rssp + rssp->hashkey_offset);
|
memcpy(keyp, rss_key, NETVSC_HASH_KEYLEN);
|
|
ret = rndis_filter_send_request(rdev, request);
|
if (ret != 0)
|
goto cleanup;
|
|
wait_for_completion(&request->wait_event);
|
set_complete = &request->response_msg.msg.set_complete;
|
if (set_complete->status == RNDIS_STATUS_SUCCESS) {
|
if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
|
!(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
|
memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
|
|
} else {
|
netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
|
set_complete->status);
|
ret = -EINVAL;
|
}
|
|
cleanup:
|
put_rndis_request(rdev, request);
|
return ret;
|
}
|
|
int rndis_filter_set_rss_param(struct rndis_device *rdev,
|
const u8 *rss_key)
|
{
|
/* Disable RSS before change */
|
rndis_set_rss_param_msg(rdev, rss_key,
|
NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
|
|
return rndis_set_rss_param_msg(rdev, rss_key, 0);
|
}
|
|
static int rndis_filter_query_device_link_status(struct rndis_device *dev,
|
struct netvsc_device *net_device)
|
{
|
u32 size = sizeof(u32);
|
u32 link_status;
|
|
return rndis_filter_query_device(dev, net_device,
|
RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
|
&link_status, &size);
|
}
|
|
static int rndis_filter_query_link_speed(struct rndis_device *dev,
|
struct netvsc_device *net_device)
|
{
|
u32 size = sizeof(u32);
|
u32 link_speed;
|
struct net_device_context *ndc;
|
int ret;
|
|
ret = rndis_filter_query_device(dev, net_device,
|
RNDIS_OID_GEN_LINK_SPEED,
|
&link_speed, &size);
|
|
if (!ret) {
|
ndc = netdev_priv(dev->ndev);
|
|
/* The link speed reported from host is in 100bps unit, so
|
* we convert it to Mbps here.
|
*/
|
ndc->speed = link_speed / 10000;
|
}
|
|
return ret;
|
}
|
|
static int rndis_filter_set_packet_filter(struct rndis_device *dev,
|
u32 new_filter)
|
{
|
struct rndis_request *request;
|
struct rndis_set_request *set;
|
int ret;
|
|
if (dev->filter == new_filter)
|
return 0;
|
|
request = get_rndis_request(dev, RNDIS_MSG_SET,
|
RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
|
sizeof(u32));
|
if (!request)
|
return -ENOMEM;
|
|
/* Setup the rndis set */
|
set = &request->request_msg.msg.set_req;
|
set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
|
set->info_buflen = sizeof(u32);
|
set->info_buf_offset = sizeof(struct rndis_set_request);
|
|
memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
|
&new_filter, sizeof(u32));
|
|
ret = rndis_filter_send_request(dev, request);
|
if (ret == 0) {
|
wait_for_completion(&request->wait_event);
|
dev->filter = new_filter;
|
}
|
|
put_rndis_request(dev, request);
|
|
return ret;
|
}
|
|
static void rndis_set_multicast(struct work_struct *w)
|
{
|
struct rndis_device *rdev
|
= container_of(w, struct rndis_device, mcast_work);
|
u32 filter = NDIS_PACKET_TYPE_DIRECTED;
|
unsigned int flags = rdev->ndev->flags;
|
|
if (flags & IFF_PROMISC) {
|
filter = NDIS_PACKET_TYPE_PROMISCUOUS;
|
} else {
|
if (!netdev_mc_empty(rdev->ndev) || (flags & IFF_ALLMULTI))
|
filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
|
if (flags & IFF_BROADCAST)
|
filter |= NDIS_PACKET_TYPE_BROADCAST;
|
}
|
|
rndis_filter_set_packet_filter(rdev, filter);
|
}
|
|
void rndis_filter_update(struct netvsc_device *nvdev)
|
{
|
struct rndis_device *rdev = nvdev->extension;
|
|
schedule_work(&rdev->mcast_work);
|
}
|
|
static int rndis_filter_init_device(struct rndis_device *dev,
|
struct netvsc_device *nvdev)
|
{
|
struct rndis_request *request;
|
struct rndis_initialize_request *init;
|
struct rndis_initialize_complete *init_complete;
|
u32 status;
|
int ret;
|
|
request = get_rndis_request(dev, RNDIS_MSG_INIT,
|
RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
|
if (!request) {
|
ret = -ENOMEM;
|
goto cleanup;
|
}
|
|
/* Setup the rndis set */
|
init = &request->request_msg.msg.init_req;
|
init->major_ver = RNDIS_MAJOR_VERSION;
|
init->minor_ver = RNDIS_MINOR_VERSION;
|
init->max_xfer_size = 0x4000;
|
|
dev->state = RNDIS_DEV_INITIALIZING;
|
|
ret = rndis_filter_send_request(dev, request);
|
if (ret != 0) {
|
dev->state = RNDIS_DEV_UNINITIALIZED;
|
goto cleanup;
|
}
|
|
wait_for_completion(&request->wait_event);
|
|
init_complete = &request->response_msg.msg.init_complete;
|
status = init_complete->status;
|
if (status == RNDIS_STATUS_SUCCESS) {
|
dev->state = RNDIS_DEV_INITIALIZED;
|
nvdev->max_pkt = init_complete->max_pkt_per_msg;
|
nvdev->pkt_align = 1 << init_complete->pkt_alignment_factor;
|
ret = 0;
|
} else {
|
dev->state = RNDIS_DEV_UNINITIALIZED;
|
ret = -EINVAL;
|
}
|
|
cleanup:
|
if (request)
|
put_rndis_request(dev, request);
|
|
return ret;
|
}
|
|
static bool netvsc_device_idle(const struct netvsc_device *nvdev)
|
{
|
int i;
|
|
for (i = 0; i < nvdev->num_chn; i++) {
|
const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
|
|
if (nvchan->mrc.first != nvchan->mrc.next)
|
return false;
|
|
if (atomic_read(&nvchan->queue_sends) > 0)
|
return false;
|
}
|
|
return true;
|
}
|
|
static void rndis_filter_halt_device(struct netvsc_device *nvdev,
|
struct rndis_device *dev)
|
{
|
struct rndis_request *request;
|
struct rndis_halt_request *halt;
|
|
/* Attempt to do a rndis device halt */
|
request = get_rndis_request(dev, RNDIS_MSG_HALT,
|
RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
|
if (!request)
|
goto cleanup;
|
|
/* Setup the rndis set */
|
halt = &request->request_msg.msg.halt_req;
|
halt->req_id = atomic_inc_return(&dev->new_req_id);
|
|
/* Ignore return since this msg is optional. */
|
rndis_filter_send_request(dev, request);
|
|
dev->state = RNDIS_DEV_UNINITIALIZED;
|
|
cleanup:
|
nvdev->destroy = true;
|
|
/* Force flag to be ordered before waiting */
|
wmb();
|
|
/* Wait for all send completions */
|
wait_event(nvdev->wait_drain, netvsc_device_idle(nvdev));
|
|
if (request)
|
put_rndis_request(dev, request);
|
}
|
|
static int rndis_filter_open_device(struct rndis_device *dev)
|
{
|
int ret;
|
|
if (dev->state != RNDIS_DEV_INITIALIZED)
|
return 0;
|
|
ret = rndis_filter_set_packet_filter(dev,
|
NDIS_PACKET_TYPE_BROADCAST |
|
NDIS_PACKET_TYPE_ALL_MULTICAST |
|
NDIS_PACKET_TYPE_DIRECTED);
|
if (ret == 0)
|
dev->state = RNDIS_DEV_DATAINITIALIZED;
|
|
return ret;
|
}
|
|
static int rndis_filter_close_device(struct rndis_device *dev)
|
{
|
int ret;
|
|
if (dev->state != RNDIS_DEV_DATAINITIALIZED)
|
return 0;
|
|
/* Make sure rndis_set_multicast doesn't re-enable filter! */
|
cancel_work_sync(&dev->mcast_work);
|
|
ret = rndis_filter_set_packet_filter(dev, 0);
|
if (ret == -ENODEV)
|
ret = 0;
|
|
if (ret == 0)
|
dev->state = RNDIS_DEV_INITIALIZED;
|
|
return ret;
|
}
|
|
static void netvsc_sc_open(struct vmbus_channel *new_sc)
|
{
|
struct net_device *ndev =
|
hv_get_drvdata(new_sc->primary_channel->device_obj);
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
struct netvsc_device *nvscdev;
|
u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
|
struct netvsc_channel *nvchan;
|
int ret;
|
|
/* This is safe because this callback only happens when
|
* new device is being setup and waiting on the channel_init_wait.
|
*/
|
nvscdev = rcu_dereference_raw(ndev_ctx->nvdev);
|
if (!nvscdev || chn_index >= nvscdev->num_chn)
|
return;
|
|
nvchan = nvscdev->chan_table + chn_index;
|
|
/* Because the device uses NAPI, all the interrupt batching and
|
* control is done via Net softirq, not the channel handling
|
*/
|
set_channel_read_mode(new_sc, HV_CALL_ISR);
|
|
/* Set the channel before opening.*/
|
nvchan->channel = new_sc;
|
|
ret = vmbus_open(new_sc, netvsc_ring_bytes,
|
netvsc_ring_bytes, NULL, 0,
|
netvsc_channel_cb, nvchan);
|
if (ret == 0)
|
napi_enable(&nvchan->napi);
|
else
|
netdev_notice(ndev, "sub channel open failed: %d\n", ret);
|
|
if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn)
|
wake_up(&nvscdev->subchan_open);
|
}
|
|
/* Open sub-channels after completing the handling of the device probe.
|
* This breaks overlap of processing the host message for the
|
* new primary channel with the initialization of sub-channels.
|
*/
|
int rndis_set_subchannel(struct net_device *ndev,
|
struct netvsc_device *nvdev,
|
struct netvsc_device_info *dev_info)
|
{
|
struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
struct hv_device *hv_dev = ndev_ctx->device_ctx;
|
struct rndis_device *rdev = nvdev->extension;
|
int i, ret;
|
|
ASSERT_RTNL();
|
|
memset(init_packet, 0, sizeof(struct nvsp_message));
|
init_packet->hdr.msg_type = NVSP_MSG5_TYPE_SUBCHANNEL;
|
init_packet->msg.v5_msg.subchn_req.op = NVSP_SUBCHANNEL_ALLOCATE;
|
init_packet->msg.v5_msg.subchn_req.num_subchannels =
|
nvdev->num_chn - 1;
|
trace_nvsp_send(ndev, init_packet);
|
|
ret = vmbus_sendpacket(hv_dev->channel, init_packet,
|
sizeof(struct nvsp_message),
|
(unsigned long)init_packet,
|
VM_PKT_DATA_INBAND,
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
if (ret) {
|
netdev_err(ndev, "sub channel allocate send failed: %d\n", ret);
|
return ret;
|
}
|
|
wait_for_completion(&nvdev->channel_init_wait);
|
if (init_packet->msg.v5_msg.subchn_comp.status != NVSP_STAT_SUCCESS) {
|
netdev_err(ndev, "sub channel request failed\n");
|
return -EIO;
|
}
|
|
nvdev->num_chn = 1 +
|
init_packet->msg.v5_msg.subchn_comp.num_subchannels;
|
|
/* wait for all sub channels to open */
|
wait_event(nvdev->subchan_open,
|
atomic_read(&nvdev->open_chn) == nvdev->num_chn);
|
|
for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
|
ndev_ctx->tx_table[i] = i % nvdev->num_chn;
|
|
/* ignore failures from setting rss parameters, still have channels */
|
if (dev_info)
|
rndis_filter_set_rss_param(rdev, dev_info->rss_key);
|
else
|
rndis_filter_set_rss_param(rdev, netvsc_hash_key);
|
|
netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
|
netif_set_real_num_rx_queues(ndev, nvdev->num_chn);
|
|
return 0;
|
}
|
|
static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
|
struct netvsc_device *nvdev)
|
{
|
struct net_device *net = rndis_device->ndev;
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
struct ndis_offload hwcaps;
|
struct ndis_offload_params offloads;
|
unsigned int gso_max_size = GSO_MAX_SIZE;
|
int ret;
|
|
/* Find HW offload capabilities */
|
ret = rndis_query_hwcaps(rndis_device, nvdev, &hwcaps);
|
if (ret != 0)
|
return ret;
|
|
/* A value of zero means "no change"; now turn on what we want. */
|
memset(&offloads, 0, sizeof(struct ndis_offload_params));
|
|
/* Linux does not care about IP checksum, always does in kernel */
|
offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED;
|
|
/* Reset previously set hw_features flags */
|
net->hw_features &= ~NETVSC_SUPPORTED_HW_FEATURES;
|
net_device_ctx->tx_checksum_mask = 0;
|
|
/* Compute tx offload settings based on hw capabilities */
|
net->hw_features |= NETIF_F_RXCSUM;
|
net->hw_features |= NETIF_F_SG;
|
net->hw_features |= NETIF_F_RXHASH;
|
|
if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
|
/* Can checksum TCP */
|
net->hw_features |= NETIF_F_IP_CSUM;
|
net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP;
|
|
offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) {
|
offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
|
net->hw_features |= NETIF_F_TSO;
|
|
if (hwcaps.lsov2.ip4_maxsz < gso_max_size)
|
gso_max_size = hwcaps.lsov2.ip4_maxsz;
|
}
|
|
if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) {
|
offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP;
|
}
|
}
|
|
if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) {
|
net->hw_features |= NETIF_F_IPV6_CSUM;
|
|
offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP;
|
|
if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) &&
|
(hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) {
|
offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
|
net->hw_features |= NETIF_F_TSO6;
|
|
if (hwcaps.lsov2.ip6_maxsz < gso_max_size)
|
gso_max_size = hwcaps.lsov2.ip6_maxsz;
|
}
|
|
if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) {
|
offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP;
|
}
|
}
|
|
if (hwcaps.rsc.ip4 && hwcaps.rsc.ip6) {
|
net->hw_features |= NETIF_F_LRO;
|
|
if (net->features & NETIF_F_LRO) {
|
offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
|
offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED;
|
} else {
|
offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
|
offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED;
|
}
|
}
|
|
/* In case some hw_features disappeared we need to remove them from
|
* net->features list as they're no longer supported.
|
*/
|
net->features &= ~NETVSC_SUPPORTED_HW_FEATURES | net->hw_features;
|
|
netif_set_gso_max_size(net, gso_max_size);
|
|
ret = rndis_filter_set_offload_params(net, nvdev, &offloads);
|
|
return ret;
|
}
|
|
static void rndis_get_friendly_name(struct net_device *net,
|
struct rndis_device *rndis_device,
|
struct netvsc_device *net_device)
|
{
|
ucs2_char_t wname[256];
|
unsigned long len;
|
u8 ifalias[256];
|
u32 size;
|
|
size = sizeof(wname);
|
if (rndis_filter_query_device(rndis_device, net_device,
|
RNDIS_OID_GEN_FRIENDLY_NAME,
|
wname, &size) != 0)
|
return; /* ignore if host does not support */
|
|
if (size == 0)
|
return; /* name not set */
|
|
/* Convert Windows Unicode string to UTF-8 */
|
len = ucs2_as_utf8(ifalias, wname, sizeof(ifalias));
|
|
/* ignore the default value from host */
|
if (strcmp(ifalias, "Network Adapter") != 0)
|
dev_set_alias(net, ifalias, len);
|
}
|
|
struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
|
struct netvsc_device_info *device_info)
|
{
|
struct net_device *net = hv_get_drvdata(dev);
|
struct net_device_context *ndc = netdev_priv(net);
|
struct netvsc_device *net_device;
|
struct rndis_device *rndis_device;
|
struct ndis_recv_scale_cap rsscap;
|
u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
|
u32 mtu, size;
|
u32 num_possible_rss_qs;
|
int i, ret;
|
|
rndis_device = get_rndis_device();
|
if (!rndis_device)
|
return ERR_PTR(-ENODEV);
|
|
/* Let the inner driver handle this first to create the netvsc channel
|
* NOTE! Once the channel is created, we may get a receive callback
|
* (RndisFilterOnReceive()) before this call is completed
|
*/
|
net_device = netvsc_device_add(dev, device_info);
|
if (IS_ERR(net_device)) {
|
kfree(rndis_device);
|
return net_device;
|
}
|
|
/* Initialize the rndis device */
|
net_device->max_chn = 1;
|
net_device->num_chn = 1;
|
|
net_device->extension = rndis_device;
|
rndis_device->ndev = net;
|
|
/* Send the rndis initialization message */
|
ret = rndis_filter_init_device(rndis_device, net_device);
|
if (ret != 0)
|
goto err_dev_remv;
|
|
/* Get the MTU from the host */
|
size = sizeof(u32);
|
ret = rndis_filter_query_device(rndis_device, net_device,
|
RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
|
&mtu, &size);
|
if (ret == 0 && size == sizeof(u32) && mtu < net->mtu)
|
net->mtu = mtu;
|
|
/* Get the mac address */
|
ret = rndis_filter_query_device_mac(rndis_device, net_device);
|
if (ret != 0)
|
goto err_dev_remv;
|
|
memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
|
|
/* Get friendly name as ifalias*/
|
if (!net->ifalias)
|
rndis_get_friendly_name(net, rndis_device, net_device);
|
|
/* Query and set hardware capabilities */
|
ret = rndis_netdev_set_hwcaps(rndis_device, net_device);
|
if (ret != 0)
|
goto err_dev_remv;
|
|
rndis_filter_query_device_link_status(rndis_device, net_device);
|
|
netdev_dbg(net, "Device MAC %pM link state %s\n",
|
rndis_device->hw_mac_adr,
|
rndis_device->link_state ? "down" : "up");
|
|
if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
|
goto out;
|
|
rndis_filter_query_link_speed(rndis_device, net_device);
|
|
/* vRSS setup */
|
memset(&rsscap, 0, rsscap_size);
|
ret = rndis_filter_query_device(rndis_device, net_device,
|
OID_GEN_RECEIVE_SCALE_CAPABILITIES,
|
&rsscap, &rsscap_size);
|
if (ret || rsscap.num_recv_que < 2)
|
goto out;
|
|
/* This guarantees that num_possible_rss_qs <= num_online_cpus */
|
num_possible_rss_qs = min_t(u32, num_online_cpus(),
|
rsscap.num_recv_que);
|
|
net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, num_possible_rss_qs);
|
|
/* We will use the given number of channels if available. */
|
net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
|
|
if (!netif_is_rxfh_configured(net)) {
|
for (i = 0; i < ITAB_NUM; i++)
|
ndc->rx_table[i] = ethtool_rxfh_indir_default(
|
i, net_device->num_chn);
|
}
|
|
atomic_set(&net_device->open_chn, 1);
|
vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
|
|
for (i = 1; i < net_device->num_chn; i++) {
|
ret = netvsc_alloc_recv_comp_ring(net_device, i);
|
if (ret) {
|
while (--i != 0)
|
vfree(net_device->chan_table[i].mrc.slots);
|
goto out;
|
}
|
}
|
|
for (i = 1; i < net_device->num_chn; i++)
|
netif_napi_add(net, &net_device->chan_table[i].napi,
|
netvsc_poll, NAPI_POLL_WEIGHT);
|
|
return net_device;
|
|
out:
|
/* setting up multiple channels failed */
|
net_device->max_chn = 1;
|
net_device->num_chn = 1;
|
return net_device;
|
|
err_dev_remv:
|
rndis_filter_device_remove(dev, net_device);
|
return ERR_PTR(ret);
|
}
|
|
void rndis_filter_device_remove(struct hv_device *dev,
|
struct netvsc_device *net_dev)
|
{
|
struct rndis_device *rndis_dev = net_dev->extension;
|
|
/* Halt and release the rndis device */
|
rndis_filter_halt_device(net_dev, rndis_dev);
|
|
netvsc_device_remove(dev);
|
}
|
|
int rndis_filter_open(struct netvsc_device *nvdev)
|
{
|
if (!nvdev)
|
return -EINVAL;
|
|
return rndis_filter_open_device(nvdev->extension);
|
}
|
|
int rndis_filter_close(struct netvsc_device *nvdev)
|
{
|
if (!nvdev)
|
return -EINVAL;
|
|
return rndis_filter_close_device(nvdev->extension);
|
}
|
