![Andrew Schwartzmeyer](/assets/img/avatar_default.png)
Uses device_info->num_chn to pass user provided number of vRSS queues (from ethtool --set-channels) to rndis_filter_device_add. If nonzero and less than the maximum, set net_device->num_chn to the given value; else default to prior algorithm. Always initialize struct device_info to 0, otherwise not all its fields are guaranteed to be 0, which is necessary when checking if num_chn has been purposefully set. Signed-off-by: Andrew Schwartzmeyer <andschwa@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1239 lines
33 KiB
C
1239 lines
33 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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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 "hyperv_net.h"
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#define RNDIS_EXT_LEN 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 struct rndis_device *get_rndis_device(void)
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{
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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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device->state = RNDIS_DEV_UNINITIALIZED;
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return device;
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}
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static struct rndis_request *get_rndis_request(struct rndis_device *dev,
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u32 msg_type,
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u32 msg_len)
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{
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struct rndis_request *request;
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struct rndis_message *rndis_msg;
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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
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* request/response packet types so we just used the SetRequest as a
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* template
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*/
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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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{
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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 hv_device *hv_dev,
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struct rndis_message *rndis_msg)
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{
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struct net_device *netdev;
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struct netvsc_device *net_device;
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net_device = hv_get_drvdata(hv_dev);
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netdev = net_device->ndev;
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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, "
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"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;
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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, "
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"pkt aligned %u)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.init_complete.req_id,
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rndis_msg->msg.init_complete.status,
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rndis_msg->msg.init_complete.major_ver,
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rndis_msg->msg.init_complete.minor_ver,
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rndis_msg->msg.init_complete.dev_flags,
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rndis_msg->msg.init_complete.max_xfer_size,
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rndis_msg->msg.init_complete.
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max_pkt_per_msg,
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rndis_msg->msg.init_complete.
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pkt_alignment_factor);
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break;
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case RNDIS_MSG_QUERY_C:
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netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
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"(len %u, id 0x%x, status 0x%x, buf len %u, "
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"buf offset %u)\n",
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rndis_msg->msg_len,
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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,
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rndis_msg->msg.query_complete.
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info_buf_offset);
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break;
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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",
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rndis_msg->msg_len,
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rndis_msg->msg.set_complete.req_id,
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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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int ret;
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struct hv_netvsc_packet *packet;
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struct hv_page_buffer page_buf[2];
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/* Setup the packet to send it */
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packet = &req->pkt;
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packet->is_data_pkt = false;
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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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packet->page_buf = page_buf;
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packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
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PAGE_SHIFT;
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packet->page_buf[0].len = req->request_msg.msg_len;
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packet->page_buf[0].offset =
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(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
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/* Add one page_buf when request_msg crossing page boundary */
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if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
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packet->page_buf_cnt++;
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packet->page_buf[0].len = PAGE_SIZE -
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packet->page_buf[0].offset;
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packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
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+ packet->page_buf[0].len) >> PAGE_SHIFT;
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packet->page_buf[1].offset = 0;
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packet->page_buf[1].len = req->request_msg.msg_len -
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packet->page_buf[0].len;
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}
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packet->send_completion = NULL;
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packet->xmit_more = false;
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ret = netvsc_send(dev->net_dev->dev, packet);
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return ret;
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}
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static void rndis_set_link_state(struct rndis_device *rdev,
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struct rndis_request *request)
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{
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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)) {
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memcpy(&link_status, (void *)((unsigned long)query_complete +
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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 rndis_device *dev,
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struct rndis_message *resp)
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{
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struct rndis_request *request = NULL;
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bool found = false;
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unsigned long flags;
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struct net_device *ndev;
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ndev = dev->net_dev->ndev;
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spin_lock_irqsave(&dev->request_lock, flags);
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list_for_each_entry(request, &dev->req_list, list_ent) {
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/*
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* All request/response message contains RequestId as the 1st
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* field
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*/
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if (request->request_msg.msg.init_req.req_id
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== resp->msg.init_complete.req_id) {
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found = true;
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break;
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}
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}
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spin_unlock_irqrestore(&dev->request_lock, flags);
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if (found) {
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if (resp->msg_len <=
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sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
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memcpy(&request->response_msg, resp,
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resp->msg_len);
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if (request->request_msg.ndis_msg_type ==
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RNDIS_MSG_QUERY && request->request_msg.msg.
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query_req.oid == RNDIS_OID_GEN_MEDIA_CONNECT_STATUS)
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rndis_set_link_state(dev, request);
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} else {
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netdev_err(ndev,
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"rndis response buffer overflow "
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"detected (size %u max %zu)\n",
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resp->msg_len,
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sizeof(struct rndis_message));
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if (resp->ndis_msg_type ==
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RNDIS_MSG_RESET_C) {
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/* does not have a request id field */
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request->response_msg.msg.reset_complete.
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status = RNDIS_STATUS_BUFFER_OVERFLOW;
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} else {
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request->response_msg.msg.
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init_complete.status =
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RNDIS_STATUS_BUFFER_OVERFLOW;
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}
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}
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complete(&request->wait_event);
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} else {
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netdev_err(ndev,
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"no rndis request found for this response "
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"(id 0x%x res type 0x%x)\n",
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resp->msg.init_complete.req_id,
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resp->ndis_msg_type);
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}
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}
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/*
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* Get the Per-Packet-Info with the specified type
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* return NULL if not found.
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*/
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static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
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{
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struct rndis_per_packet_info *ppi;
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int len;
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if (rpkt->per_pkt_info_offset == 0)
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return NULL;
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ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
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rpkt->per_pkt_info_offset);
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len = rpkt->per_pkt_info_len;
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while (len > 0) {
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if (ppi->type == type)
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return (void *)((ulong)ppi + ppi->ppi_offset);
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len -= ppi->size;
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ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
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}
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return NULL;
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}
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static void rndis_filter_receive_data(struct rndis_device *dev,
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struct rndis_message *msg,
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struct hv_netvsc_packet *pkt)
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{
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struct rndis_packet *rndis_pkt;
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u32 data_offset;
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struct ndis_pkt_8021q_info *vlan;
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struct ndis_tcp_ip_checksum_info *csum_info;
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rndis_pkt = &msg->msg.pkt;
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/* Remove the rndis header and pass it back up the stack */
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data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
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pkt->total_data_buflen -= data_offset;
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/*
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* Make sure we got a valid RNDIS message, now total_data_buflen
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* should be the data packet size plus the trailer padding size
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*/
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if (pkt->total_data_buflen < rndis_pkt->data_len) {
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netdev_err(dev->net_dev->ndev, "rndis message buffer "
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"overflow detected (got %u, min %u)"
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"...dropping this message!\n",
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pkt->total_data_buflen, rndis_pkt->data_len);
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return;
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}
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/*
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* Remove the rndis trailer padding from rndis packet message
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* rndis_pkt->data_len tell us the real data length, we only copy
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* the data packet to the stack, without the rndis trailer padding
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*/
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pkt->total_data_buflen = rndis_pkt->data_len;
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pkt->data = (void *)((unsigned long)pkt->data + data_offset);
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vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
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if (vlan) {
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pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
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(vlan->pri << VLAN_PRIO_SHIFT);
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} else {
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pkt->vlan_tci = 0;
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}
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csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
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netvsc_recv_callback(dev->net_dev->dev, pkt, csum_info);
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}
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int rndis_filter_receive(struct hv_device *dev,
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struct hv_netvsc_packet *pkt)
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{
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struct netvsc_device *net_dev = hv_get_drvdata(dev);
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struct rndis_device *rndis_dev;
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struct rndis_message *rndis_msg;
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struct net_device *ndev;
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int ret = 0;
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if (!net_dev) {
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ret = -EINVAL;
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goto exit;
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}
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ndev = net_dev->ndev;
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/* Make sure the rndis device state is initialized */
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if (!net_dev->extension) {
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netdev_err(ndev, "got rndis message but no rndis device - "
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"dropping this message!\n");
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ret = -ENODEV;
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goto exit;
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}
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rndis_dev = (struct rndis_device *)net_dev->extension;
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if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
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netdev_err(ndev, "got rndis message but rndis device "
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"uninitialized...dropping this message!\n");
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ret = -ENODEV;
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goto exit;
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}
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rndis_msg = pkt->data;
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if (netif_msg_rx_err(net_dev->nd_ctx))
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dump_rndis_message(dev, rndis_msg);
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switch (rndis_msg->ndis_msg_type) {
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case RNDIS_MSG_PACKET:
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/* data msg */
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rndis_filter_receive_data(rndis_dev, rndis_msg, pkt);
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break;
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case RNDIS_MSG_INIT_C:
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case RNDIS_MSG_QUERY_C:
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case RNDIS_MSG_SET_C:
|
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/* completion msgs */
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rndis_filter_receive_response(rndis_dev, rndis_msg);
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break;
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case RNDIS_MSG_INDICATE:
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/* notification msgs */
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netvsc_linkstatus_callback(dev, rndis_msg);
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break;
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default:
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netdev_err(ndev,
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"unhandled rndis message (type %u 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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exit:
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if (ret != 0)
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pkt->status = NVSP_STAT_FAIL;
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|
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return ret;
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}
|
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|
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static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
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void *result, u32 *result_size)
|
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{
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struct rndis_request *request;
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u32 inresult_size = *result_size;
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struct rndis_query_request *query;
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struct rndis_query_complete *query_complete;
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int ret = 0;
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unsigned long t;
|
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|
|
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_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;
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
ret = -ETIMEDOUT;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static int rndis_filter_query_device_mac(struct rndis_device *dev)
|
|
{
|
|
u32 size = ETH_ALEN;
|
|
|
|
return rndis_filter_query_device(dev,
|
|
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 hv_device *hdev, char *mac)
|
|
{
|
|
struct netvsc_device *nvdev = hv_get_drvdata(hdev);
|
|
struct rndis_device *rdev = nvdev->extension;
|
|
struct net_device *ndev = nvdev->ndev;
|
|
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;
|
|
unsigned long t;
|
|
|
|
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;
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
netdev_err(ndev, "timeout before we got a set response...\n");
|
|
/*
|
|
* can't put_rndis_request, since we may still receive a
|
|
* send-completion.
|
|
*/
|
|
return -EBUSY;
|
|
} else {
|
|
set_complete = &request->response_msg.msg.set_complete;
|
|
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
|
|
netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
|
|
set_complete->status);
|
|
ret = -EINVAL;
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
put_rndis_request(rdev, request);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
rndis_filter_set_offload_params(struct hv_device *hdev,
|
|
struct ndis_offload_params *req_offloads)
|
|
{
|
|
struct netvsc_device *nvdev = hv_get_drvdata(hdev);
|
|
struct rndis_device *rdev = nvdev->extension;
|
|
struct net_device *ndev = nvdev->ndev;
|
|
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;
|
|
unsigned long t;
|
|
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;
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
netdev_err(ndev, "timeout before we got aOFFLOAD set response...\n");
|
|
/* can't put_rndis_request, since we may still receive a
|
|
* send-completion.
|
|
*/
|
|
return -EBUSY;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
u8 netvsc_hash_key[HASH_KEYLEN] = {
|
|
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
|
|
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
|
|
0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
|
|
0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
|
|
0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
|
|
};
|
|
|
|
static int rndis_filter_set_rss_param(struct rndis_device *rdev, int num_queue)
|
|
{
|
|
struct net_device *ndev = rdev->net_dev->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 + HASH_KEYLEN;
|
|
struct ndis_recv_scale_param *rssp;
|
|
u32 *itab;
|
|
u8 *keyp;
|
|
int i, ret;
|
|
unsigned long t;
|
|
|
|
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 = 0;
|
|
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 = HASH_KEYLEN;
|
|
rssp->kashkey_offset = rssp->indirect_taboffset +
|
|
rssp->indirect_tabsize;
|
|
|
|
/* Set indirection table entries */
|
|
itab = (u32 *)(rssp + 1);
|
|
for (i = 0; i < ITAB_NUM; i++)
|
|
itab[i] = i % num_queue;
|
|
|
|
/* Set hask key values */
|
|
keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
|
|
for (i = 0; i < HASH_KEYLEN; i++)
|
|
keyp[i] = netvsc_hash_key[i];
|
|
|
|
|
|
ret = rndis_filter_send_request(rdev, request);
|
|
if (ret != 0)
|
|
goto cleanup;
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
if (t == 0) {
|
|
netdev_err(ndev, "timeout before we got a set response...\n");
|
|
/* can't put_rndis_request, since we may still receive a
|
|
* send-completion.
|
|
*/
|
|
return -ETIMEDOUT;
|
|
} else {
|
|
set_complete = &request->response_msg.msg.set_complete;
|
|
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
|
|
netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
|
|
set_complete->status);
|
|
ret = -EINVAL;
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
put_rndis_request(rdev, request);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int rndis_filter_query_device_link_status(struct rndis_device *dev)
|
|
{
|
|
u32 size = sizeof(u32);
|
|
u32 link_status;
|
|
int ret;
|
|
|
|
ret = rndis_filter_query_device(dev,
|
|
RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
|
|
&link_status, &size);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
|
|
{
|
|
struct rndis_request *request;
|
|
struct rndis_set_request *set;
|
|
struct rndis_set_complete *set_complete;
|
|
u32 status;
|
|
int ret;
|
|
unsigned long t;
|
|
struct net_device *ndev;
|
|
|
|
ndev = dev->net_dev->ndev;
|
|
|
|
request = get_rndis_request(dev, RNDIS_MSG_SET,
|
|
RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
|
|
sizeof(u32));
|
|
if (!request) {
|
|
ret = -ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* 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)
|
|
goto cleanup;
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
|
|
if (t == 0) {
|
|
netdev_err(ndev,
|
|
"timeout before we got a set response...\n");
|
|
ret = -ETIMEDOUT;
|
|
/*
|
|
* We can't deallocate the request since we may still receive a
|
|
* send completion for it.
|
|
*/
|
|
goto exit;
|
|
} else {
|
|
set_complete = &request->response_msg.msg.set_complete;
|
|
status = set_complete->status;
|
|
}
|
|
|
|
cleanup:
|
|
if (request)
|
|
put_rndis_request(dev, request);
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int rndis_filter_init_device(struct rndis_device *dev)
|
|
{
|
|
struct rndis_request *request;
|
|
struct rndis_initialize_request *init;
|
|
struct rndis_initialize_complete *init_complete;
|
|
u32 status;
|
|
int ret;
|
|
unsigned long t;
|
|
struct netvsc_device *nvdev = dev->net_dev;
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
|
|
|
|
if (t == 0) {
|
|
ret = -ETIMEDOUT;
|
|
goto cleanup;
|
|
}
|
|
|
|
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 void rndis_filter_halt_device(struct rndis_device *dev)
|
|
{
|
|
struct rndis_request *request;
|
|
struct rndis_halt_request *halt;
|
|
struct netvsc_device *nvdev = dev->net_dev;
|
|
struct hv_device *hdev = nvdev->dev;
|
|
ulong flags;
|
|
|
|
/* 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:
|
|
spin_lock_irqsave(&hdev->channel->inbound_lock, flags);
|
|
nvdev->destroy = true;
|
|
spin_unlock_irqrestore(&hdev->channel->inbound_lock, flags);
|
|
|
|
/* Wait for all send completions */
|
|
wait_event(nvdev->wait_drain,
|
|
atomic_read(&nvdev->num_outstanding_sends) == 0);
|
|
|
|
if (request)
|
|
put_rndis_request(dev, request);
|
|
return;
|
|
}
|
|
|
|
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;
|
|
|
|
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 netvsc_device *nvscdev;
|
|
u16 chn_index = new_sc->offermsg.offer.sub_channel_index;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
nvscdev = hv_get_drvdata(new_sc->primary_channel->device_obj);
|
|
|
|
spin_lock_irqsave(&nvscdev->sc_lock, flags);
|
|
nvscdev->num_sc_offered--;
|
|
spin_unlock_irqrestore(&nvscdev->sc_lock, flags);
|
|
if (nvscdev->num_sc_offered == 0)
|
|
complete(&nvscdev->channel_init_wait);
|
|
|
|
if (chn_index >= nvscdev->num_chn)
|
|
return;
|
|
|
|
set_per_channel_state(new_sc, nvscdev->sub_cb_buf + (chn_index - 1) *
|
|
NETVSC_PACKET_SIZE);
|
|
|
|
ret = vmbus_open(new_sc, nvscdev->ring_size * PAGE_SIZE,
|
|
nvscdev->ring_size * PAGE_SIZE, NULL, 0,
|
|
netvsc_channel_cb, new_sc);
|
|
|
|
if (ret == 0)
|
|
nvscdev->chn_table[chn_index] = new_sc;
|
|
}
|
|
|
|
int rndis_filter_device_add(struct hv_device *dev,
|
|
void *additional_info)
|
|
{
|
|
int ret;
|
|
struct netvsc_device *net_device;
|
|
struct rndis_device *rndis_device;
|
|
struct netvsc_device_info *device_info = additional_info;
|
|
struct ndis_offload_params offloads;
|
|
struct nvsp_message *init_packet;
|
|
unsigned long t;
|
|
struct ndis_recv_scale_cap rsscap;
|
|
u32 rsscap_size = sizeof(struct ndis_recv_scale_cap);
|
|
u32 mtu, size;
|
|
u32 num_rss_qs;
|
|
u32 sc_delta;
|
|
const struct cpumask *node_cpu_mask;
|
|
u32 num_possible_rss_qs;
|
|
unsigned long flags;
|
|
|
|
rndis_device = get_rndis_device();
|
|
if (!rndis_device)
|
|
return -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
|
|
*/
|
|
ret = netvsc_device_add(dev, additional_info);
|
|
if (ret != 0) {
|
|
kfree(rndis_device);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Initialize the rndis device */
|
|
net_device = hv_get_drvdata(dev);
|
|
net_device->max_chn = 1;
|
|
net_device->num_chn = 1;
|
|
|
|
spin_lock_init(&net_device->sc_lock);
|
|
|
|
net_device->extension = rndis_device;
|
|
rndis_device->net_dev = net_device;
|
|
|
|
/* Send the rndis initialization message */
|
|
ret = rndis_filter_init_device(rndis_device);
|
|
if (ret != 0) {
|
|
rndis_filter_device_remove(dev);
|
|
return ret;
|
|
}
|
|
|
|
/* Get the MTU from the host */
|
|
size = sizeof(u32);
|
|
ret = rndis_filter_query_device(rndis_device,
|
|
RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
|
|
&mtu, &size);
|
|
if (ret == 0 && size == sizeof(u32) && mtu < net_device->ndev->mtu)
|
|
net_device->ndev->mtu = mtu;
|
|
|
|
/* Get the mac address */
|
|
ret = rndis_filter_query_device_mac(rndis_device);
|
|
if (ret != 0) {
|
|
rndis_filter_device_remove(dev);
|
|
return ret;
|
|
}
|
|
|
|
memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
|
|
|
|
/* Turn on the offloads; the host supports all of the relevant
|
|
* offloads.
|
|
*/
|
|
memset(&offloads, 0, sizeof(struct ndis_offload_params));
|
|
/* A value of zero means "no change"; now turn on what we
|
|
* want.
|
|
*/
|
|
offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
|
|
offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
|
|
|
|
|
|
ret = rndis_filter_set_offload_params(dev, &offloads);
|
|
if (ret)
|
|
goto err_dev_remv;
|
|
|
|
rndis_filter_query_device_link_status(rndis_device);
|
|
|
|
device_info->link_state = rndis_device->link_state;
|
|
|
|
dev_info(&dev->device, "Device MAC %pM link state %s\n",
|
|
rndis_device->hw_mac_adr,
|
|
device_info->link_state ? "down" : "up");
|
|
|
|
if (net_device->nvsp_version < NVSP_PROTOCOL_VERSION_5)
|
|
return 0;
|
|
|
|
/* vRSS setup */
|
|
memset(&rsscap, 0, rsscap_size);
|
|
ret = rndis_filter_query_device(rndis_device,
|
|
OID_GEN_RECEIVE_SCALE_CAPABILITIES,
|
|
&rsscap, &rsscap_size);
|
|
if (ret || rsscap.num_recv_que < 2)
|
|
goto out;
|
|
|
|
num_rss_qs = min(device_info->max_num_vrss_chns, rsscap.num_recv_que);
|
|
|
|
net_device->max_chn = rsscap.num_recv_que;
|
|
|
|
/*
|
|
* We will limit the VRSS channels to the number CPUs in the NUMA node
|
|
* the primary channel is currently bound to.
|
|
*/
|
|
node_cpu_mask = cpumask_of_node(cpu_to_node(dev->channel->target_cpu));
|
|
num_possible_rss_qs = cpumask_weight(node_cpu_mask);
|
|
|
|
/* We will use the given number of channels if available. */
|
|
if (device_info->num_chn && device_info->num_chn < net_device->max_chn)
|
|
net_device->num_chn = device_info->num_chn;
|
|
else
|
|
net_device->num_chn = min(num_possible_rss_qs, num_rss_qs);
|
|
|
|
num_rss_qs = net_device->num_chn - 1;
|
|
net_device->num_sc_offered = num_rss_qs;
|
|
|
|
if (net_device->num_chn == 1)
|
|
goto out;
|
|
|
|
net_device->sub_cb_buf = vzalloc((net_device->num_chn - 1) *
|
|
NETVSC_PACKET_SIZE);
|
|
if (!net_device->sub_cb_buf) {
|
|
net_device->num_chn = 1;
|
|
dev_info(&dev->device, "No memory for subchannels.\n");
|
|
goto out;
|
|
}
|
|
|
|
vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
|
|
|
|
init_packet = &net_device->channel_init_pkt;
|
|
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 =
|
|
net_device->num_chn - 1;
|
|
ret = vmbus_sendpacket(dev->channel, init_packet,
|
|
sizeof(struct nvsp_message),
|
|
(unsigned long)init_packet,
|
|
VM_PKT_DATA_INBAND,
|
|
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
|
if (ret)
|
|
goto out;
|
|
t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
|
|
if (t == 0) {
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
if (init_packet->msg.v5_msg.subchn_comp.status !=
|
|
NVSP_STAT_SUCCESS) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
net_device->num_chn = 1 +
|
|
init_packet->msg.v5_msg.subchn_comp.num_subchannels;
|
|
|
|
ret = rndis_filter_set_rss_param(rndis_device, net_device->num_chn);
|
|
|
|
/*
|
|
* Wait for the host to send us the sub-channel offers.
|
|
*/
|
|
spin_lock_irqsave(&net_device->sc_lock, flags);
|
|
sc_delta = num_rss_qs - (net_device->num_chn - 1);
|
|
net_device->num_sc_offered -= sc_delta;
|
|
spin_unlock_irqrestore(&net_device->sc_lock, flags);
|
|
|
|
while (net_device->num_sc_offered != 0) {
|
|
t = wait_for_completion_timeout(&net_device->channel_init_wait, 10*HZ);
|
|
if (t == 0)
|
|
WARN(1, "Netvsc: Waiting for sub-channel processing");
|
|
}
|
|
out:
|
|
if (ret) {
|
|
net_device->max_chn = 1;
|
|
net_device->num_chn = 1;
|
|
}
|
|
|
|
return 0; /* return 0 because primary channel can be used alone */
|
|
|
|
err_dev_remv:
|
|
rndis_filter_device_remove(dev);
|
|
return ret;
|
|
}
|
|
|
|
void rndis_filter_device_remove(struct hv_device *dev)
|
|
{
|
|
struct netvsc_device *net_dev = hv_get_drvdata(dev);
|
|
struct rndis_device *rndis_dev = net_dev->extension;
|
|
|
|
/* Halt and release the rndis device */
|
|
rndis_filter_halt_device(rndis_dev);
|
|
|
|
kfree(rndis_dev);
|
|
net_dev->extension = NULL;
|
|
|
|
netvsc_device_remove(dev);
|
|
}
|
|
|
|
|
|
int rndis_filter_open(struct hv_device *dev)
|
|
{
|
|
struct netvsc_device *net_device = hv_get_drvdata(dev);
|
|
|
|
if (!net_device)
|
|
return -EINVAL;
|
|
|
|
return rndis_filter_open_device(net_device->extension);
|
|
}
|
|
|
|
int rndis_filter_close(struct hv_device *dev)
|
|
{
|
|
struct netvsc_device *nvdev = hv_get_drvdata(dev);
|
|
|
|
if (!nvdev)
|
|
return -EINVAL;
|
|
|
|
return rndis_filter_close_device(nvdev->extension);
|
|
}
|