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