--- /dev/null
+/*
+ * 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 "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;
+
+ nvscdev = hv_get_drvdata(new_sc->primary_channel->device_obj);
+
+ 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;
+
+ 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;
+
+ 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))
+ 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;
+
+ net_device->max_chn = rsscap.num_recv_que;
+ net_device->num_chn = (num_online_cpus() < rsscap.num_recv_que) ?
+ num_online_cpus() : rsscap.num_recv_que;
+ 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);
+
+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);
+}
Code Review / kvmfornfv.git / blobdiff