diff options
Diffstat (limited to 'drivers/net/hyperv/rndis_filter.c')
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 995 |
1 files changed, 995 insertions, 0 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c new file mode 100644 index 00000000..0775f0ae --- /dev/null +++ b/drivers/net/hyperv/rndis_filter.c @@ -0,0 +1,995 @@ +/* + * 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, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * + * 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 100 +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; + /* Set 2 pages for rndis requests crossing page boundary */ + struct hv_page_buffer buf[2]; + + 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 void rndis_filter_send_completion(void *ctx); + + +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; + + /* + * 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; + + /* 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[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->completion.send.send_completion = NULL; + + ret = netvsc_send(dev->net_dev->dev, packet); + return ret; +} + +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); + } else { + netdev_err(ndev, + "rndis response buffer overflow " + "detected (size %u max %zu)\n", + resp->msg_len, + sizeof(struct rndis_filter_packet)); + + 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); + } +} + +static void rndis_filter_receive_indicate_status(struct rndis_device *dev, + struct rndis_message *resp) +{ + struct rndis_indicate_status *indicate = + &resp->msg.indicate_status; + + if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { + netvsc_linkstatus_callback( + dev->net_dev->dev, 1); + } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { + netvsc_linkstatus_callback( + dev->net_dev->dev, 0); + } else { + /* + * TODO: + */ + } +} + +/* + * 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; + + 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); + + pkt->is_data_pkt = true; + + 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; + } + + netvsc_recv_callback(dev->net_dev->dev, pkt); +} + +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; + + 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 */ + rndis_filter_receive_indicate_status(rndis_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; + int 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; + + 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, 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_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); + dev->link_state = (link_status != 0) ? true : false; + + 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, 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, t; + + 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; + 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 == 0) + dev->state = RNDIS_DEV_INITIALIZED; + + return ret; +} + +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; + + 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->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 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); + + 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"); + + 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); +} + +int rndis_filter_send(struct hv_device *dev, + struct hv_netvsc_packet *pkt) +{ + int ret; + struct rndis_filter_packet *filter_pkt; + struct rndis_message *rndis_msg; + struct rndis_packet *rndis_pkt; + u32 rndis_msg_size; + bool isvlan = pkt->vlan_tci & VLAN_TAG_PRESENT; + + /* Add the rndis header */ + filter_pkt = (struct rndis_filter_packet *)pkt->extension; + + rndis_msg = &filter_pkt->msg; + rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); + if (isvlan) + rndis_msg_size += NDIS_VLAN_PPI_SIZE; + + rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; + rndis_msg->msg_len = pkt->total_data_buflen + + rndis_msg_size; + + rndis_pkt = &rndis_msg->msg.pkt; + rndis_pkt->data_offset = sizeof(struct rndis_packet); + if (isvlan) + rndis_pkt->data_offset += NDIS_VLAN_PPI_SIZE; + rndis_pkt->data_len = pkt->total_data_buflen; + + if (isvlan) { + struct rndis_per_packet_info *ppi; + struct ndis_pkt_8021q_info *vlan; + + rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); + rndis_pkt->per_pkt_info_len = NDIS_VLAN_PPI_SIZE; + + ppi = (struct rndis_per_packet_info *)((ulong)rndis_pkt + + rndis_pkt->per_pkt_info_offset); + ppi->size = NDIS_VLAN_PPI_SIZE; + ppi->type = IEEE_8021Q_INFO; + ppi->ppi_offset = sizeof(struct rndis_per_packet_info); + + vlan = (struct ndis_pkt_8021q_info *)((ulong)ppi + + ppi->ppi_offset); + vlan->vlanid = pkt->vlan_tci & VLAN_VID_MASK; + vlan->pri = (pkt->vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + } + + pkt->is_data_pkt = true; + pkt->page_buf[0].pfn = virt_to_phys(rndis_msg) >> PAGE_SHIFT; + pkt->page_buf[0].offset = + (unsigned long)rndis_msg & (PAGE_SIZE-1); + pkt->page_buf[0].len = rndis_msg_size; + + /* Add one page_buf if the rndis msg goes beyond page boundary */ + if (pkt->page_buf[0].offset + rndis_msg_size > PAGE_SIZE) { + int i; + for (i = pkt->page_buf_cnt; i > 1; i--) + pkt->page_buf[i] = pkt->page_buf[i-1]; + pkt->page_buf_cnt++; + pkt->page_buf[0].len = PAGE_SIZE - pkt->page_buf[0].offset; + pkt->page_buf[1].pfn = virt_to_phys((void *)((ulong) + rndis_msg + pkt->page_buf[0].len)) >> PAGE_SHIFT; + pkt->page_buf[1].offset = 0; + pkt->page_buf[1].len = rndis_msg_size - pkt->page_buf[0].len; + } + + /* Save the packet send completion and context */ + filter_pkt->completion = pkt->completion.send.send_completion; + filter_pkt->completion_ctx = + pkt->completion.send.send_completion_ctx; + + /* Use ours */ + pkt->completion.send.send_completion = rndis_filter_send_completion; + pkt->completion.send.send_completion_ctx = filter_pkt; + + ret = netvsc_send(dev, pkt); + if (ret != 0) { + /* + * Reset the completion to originals to allow retries from + * above + */ + pkt->completion.send.send_completion = + filter_pkt->completion; + pkt->completion.send.send_completion_ctx = + filter_pkt->completion_ctx; + } + + return ret; +} + +static void rndis_filter_send_completion(void *ctx) +{ + struct rndis_filter_packet *filter_pkt = ctx; + + /* Pass it back to the original handler */ + filter_pkt->completion(filter_pkt->completion_ctx); +} |