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- /*
- * Copyright (c) 2009, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@microsoft.com>
- * Hank Janssen <hjanssen@microsoft.com>
- */
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/wait.h>
- #include <linux/highmem.h>
- #include <linux/slab.h>
- #include <linux/io.h>
- #include <linux/if_ether.h>
- #include <linux/netdevice.h>
- #include <linux/if_vlan.h>
- #include <linux/nls.h>
- #include <linux/vmalloc.h>
- #include "hyperv_net.h"
- #define RNDIS_EXT_LEN PAGE_SIZE
- struct rndis_request {
- struct list_head list_ent;
- struct completion wait_event;
- struct rndis_message response_msg;
- /*
- * The buffer for extended info after the RNDIS response message. It's
- * referenced based on the data offset in the RNDIS message. Its size
- * is enough for current needs, and should be sufficient for the near
- * future.
- */
- u8 response_ext[RNDIS_EXT_LEN];
- /* Simplify allocation by having a netvsc packet inline */
- struct hv_netvsc_packet pkt;
- struct rndis_message request_msg;
- /*
- * The buffer for the extended info after the RNDIS request message.
- * It is referenced and sized in a similar way as response_ext.
- */
- u8 request_ext[RNDIS_EXT_LEN];
- };
- static struct rndis_device *get_rndis_device(void)
- {
- struct rndis_device *device;
- device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
- if (!device)
- return NULL;
- spin_lock_init(&device->request_lock);
- INIT_LIST_HEAD(&device->req_list);
- device->state = RNDIS_DEV_UNINITIALIZED;
- return device;
- }
- static struct rndis_request *get_rndis_request(struct rndis_device *dev,
- u32 msg_type,
- u32 msg_len)
- {
- struct rndis_request *request;
- struct rndis_message *rndis_msg;
- struct rndis_set_request *set;
- unsigned long flags;
- request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
- if (!request)
- return NULL;
- init_completion(&request->wait_event);
- rndis_msg = &request->request_msg;
- rndis_msg->ndis_msg_type = msg_type;
- rndis_msg->msg_len = msg_len;
- request->pkt.q_idx = 0;
- /*
- * 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
- */
- set = &rndis_msg->msg.set_req;
- set->req_id = atomic_inc_return(&dev->new_req_id);
- /* Add to the request list */
- spin_lock_irqsave(&dev->request_lock, flags);
- list_add_tail(&request->list_ent, &dev->req_list);
- spin_unlock_irqrestore(&dev->request_lock, flags);
- return request;
- }
- static void put_rndis_request(struct rndis_device *dev,
- struct rndis_request *req)
- {
- unsigned long flags;
- spin_lock_irqsave(&dev->request_lock, flags);
- list_del(&req->list_ent);
- spin_unlock_irqrestore(&dev->request_lock, flags);
- kfree(req);
- }
- static void dump_rndis_message(struct hv_device *hv_dev,
- struct rndis_message *rndis_msg)
- {
- struct net_device *netdev;
- struct netvsc_device *net_device;
- net_device = hv_get_drvdata(hv_dev);
- netdev = net_device->ndev;
- switch (rndis_msg->ndis_msg_type) {
- case RNDIS_MSG_PACKET:
- netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
- "data offset %u data len %u, # oob %u, "
- "oob offset %u, oob len %u, pkt offset %u, "
- "pkt len %u\n",
- rndis_msg->msg_len,
- rndis_msg->msg.pkt.data_offset,
- rndis_msg->msg.pkt.data_len,
- rndis_msg->msg.pkt.num_oob_data_elements,
- rndis_msg->msg.pkt.oob_data_offset,
- rndis_msg->msg.pkt.oob_data_len,
- rndis_msg->msg.pkt.per_pkt_info_offset,
- rndis_msg->msg.pkt.per_pkt_info_len);
- break;
- case RNDIS_MSG_INIT_C:
- netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
- "(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
- "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,
- rndis_msg->msg.init_complete.major_ver,
- rndis_msg->msg.init_complete.minor_ver,
- rndis_msg->msg.init_complete.dev_flags,
- rndis_msg->msg.init_complete.max_xfer_size,
- rndis_msg->msg.init_complete.
- max_pkt_per_msg,
- rndis_msg->msg.init_complete.
- pkt_alignment_factor);
- break;
- case RNDIS_MSG_QUERY_C:
- netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
- "(len %u, id 0x%x, status 0x%x, buf len %u, "
- "buf offset %u)\n",
- rndis_msg->msg_len,
- rndis_msg->msg.query_complete.req_id,
- rndis_msg->msg.query_complete.status,
- rndis_msg->msg.query_complete.
- info_buflen,
- rndis_msg->msg.query_complete.
- info_buf_offset);
- break;
- case RNDIS_MSG_SET_C:
- netdev_dbg(netdev,
- "RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
- rndis_msg->msg_len,
- rndis_msg->msg.set_complete.req_id,
- rndis_msg->msg.set_complete.status);
- break;
- case RNDIS_MSG_INDICATE:
- netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
- "(len %u, status 0x%x, buf len %u, buf offset %u)\n",
- rndis_msg->msg_len,
- rndis_msg->msg.indicate_status.status,
- rndis_msg->msg.indicate_status.status_buflen,
- rndis_msg->msg.indicate_status.status_buf_offset);
- break;
- default:
- netdev_dbg(netdev, "0x%x (len %u)\n",
- rndis_msg->ndis_msg_type,
- rndis_msg->msg_len);
- break;
- }
- }
- static int rndis_filter_send_request(struct rndis_device *dev,
- struct rndis_request *req)
- {
- int ret;
- struct hv_netvsc_packet *packet;
- struct hv_page_buffer page_buf[2];
- /* Setup the packet to send it */
- packet = &req->pkt;
- packet->is_data_pkt = false;
- packet->total_data_buflen = req->request_msg.msg_len;
- packet->page_buf_cnt = 1;
- packet->page_buf = page_buf;
- packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
- PAGE_SHIFT;
- packet->page_buf[0].len = req->request_msg.msg_len;
- packet->page_buf[0].offset =
- (unsigned long)&req->request_msg & (PAGE_SIZE - 1);
- /* Add one page_buf when request_msg crossing page boundary */
- if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
- packet->page_buf_cnt++;
- packet->page_buf[0].len = PAGE_SIZE -
- packet->page_buf[0].offset;
- packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
- + packet->page_buf[0].len) >> PAGE_SHIFT;
- packet->page_buf[1].offset = 0;
- packet->page_buf[1].len = req->request_msg.msg_len -
- packet->page_buf[0].len;
- }
- packet->send_completion = NULL;
- packet->xmit_more = false;
- ret = netvsc_send(dev->net_dev->dev, packet);
- return ret;
- }
- static void rndis_set_link_state(struct rndis_device *rdev,
- struct rndis_request *request)
- {
- u32 link_status;
- struct rndis_query_complete *query_complete;
- query_complete = &request->response_msg.msg.query_complete;
- if (query_complete->status == RNDIS_STATUS_SUCCESS &&
- query_complete->info_buflen == sizeof(u32)) {
- memcpy(&link_status, (void *)((unsigned long)query_complete +
- query_complete->info_buf_offset), sizeof(u32));
- rdev->link_state = link_status != 0;
- }
- }
- static void rndis_filter_receive_response(struct rndis_device *dev,
- struct rndis_message *resp)
- {
- struct rndis_request *request = NULL;
- bool found = false;
- unsigned long flags;
- struct net_device *ndev;
- ndev = dev->net_dev->ndev;
- spin_lock_irqsave(&dev->request_lock, flags);
- list_for_each_entry(request, &dev->req_list, list_ent) {
- /*
- * 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 rndis_packet *rpkt, u32 type)
- {
- struct rndis_per_packet_info *ppi;
- int len;
- if (rpkt->per_pkt_info_offset == 0)
- return NULL;
- ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
- rpkt->per_pkt_info_offset);
- len = rpkt->per_pkt_info_len;
- while (len > 0) {
- if (ppi->type == type)
- return (void *)((ulong)ppi + ppi->ppi_offset);
- len -= ppi->size;
- ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
- }
- return NULL;
- }
- static void rndis_filter_receive_data(struct rndis_device *dev,
- struct rndis_message *msg,
- struct hv_netvsc_packet *pkt)
- {
- struct rndis_packet *rndis_pkt;
- u32 data_offset;
- struct ndis_pkt_8021q_info *vlan;
- struct ndis_tcp_ip_checksum_info *csum_info;
- rndis_pkt = &msg->msg.pkt;
- /* Remove the rndis header and pass it back up the stack */
- data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
- pkt->total_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 (pkt->total_data_buflen < rndis_pkt->data_len) {
- netdev_err(dev->net_dev->ndev, "rndis message buffer "
- "overflow detected (got %u, min %u)"
- "...dropping this message!\n",
- pkt->total_data_buflen, rndis_pkt->data_len);
- return;
- }
- /*
- * 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
- */
- pkt->total_data_buflen = rndis_pkt->data_len;
- pkt->data = (void *)((unsigned long)pkt->data + data_offset);
- vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
- if (vlan) {
- pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
- (vlan->pri << VLAN_PRIO_SHIFT);
- } else {
- pkt->vlan_tci = 0;
- }
- csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
- netvsc_recv_callback(dev->net_dev->dev, pkt, csum_info);
- }
- int rndis_filter_receive(struct hv_device *dev,
- struct hv_netvsc_packet *pkt)
- {
- struct netvsc_device *net_dev = hv_get_drvdata(dev);
- struct rndis_device *rndis_dev;
- struct rndis_message *rndis_msg;
- struct net_device *ndev;
- int ret = 0;
- if (!net_dev) {
- ret = -EINVAL;
- goto exit;
- }
- ndev = net_dev->ndev;
- /* Make sure the rndis device state is initialized */
- if (!net_dev->extension) {
- netdev_err(ndev, "got rndis message but no rndis device - "
- "dropping this message!\n");
- ret = -ENODEV;
- goto exit;
- }
- rndis_dev = (struct rndis_device *)net_dev->extension;
- if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
- netdev_err(ndev, "got rndis message but rndis device "
- "uninitialized...dropping this message!\n");
- ret = -ENODEV;
- goto exit;
- }
- rndis_msg = pkt->data;
- if (netif_msg_rx_err(net_dev->nd_ctx))
- dump_rndis_message(dev, rndis_msg);
- switch (rndis_msg->ndis_msg_type) {
- case RNDIS_MSG_PACKET:
- /* data msg */
- rndis_filter_receive_data(rndis_dev, rndis_msg, pkt);
- break;
- case RNDIS_MSG_INIT_C:
- case RNDIS_MSG_QUERY_C:
- case RNDIS_MSG_SET_C:
- /* completion msgs */
- rndis_filter_receive_response(rndis_dev, rndis_msg);
- break;
- case RNDIS_MSG_INDICATE:
- /* notification msgs */
- netvsc_linkstatus_callback(dev, rndis_msg);
- break;
- default:
- netdev_err(ndev,
- "unhandled rndis message (type %u len %u)\n",
- rndis_msg->ndis_msg_type,
- rndis_msg->msg_len);
- break;
- }
- exit:
- if (ret != 0)
- pkt->status = NVSP_STAT_FAIL;
- return ret;
- }
- static int rndis_filter_query_device(struct rndis_device *dev, 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;
- unsigned long t;
- 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);
- }
|