static int netvsc_init_buf(struct hv_device *device)
{
int ret = 0;
unsigned long t;
struct netvsc_device *net_device;
struct nvsp_message *init_packet;
struct net_device *ndev;
int node;
net_device = get_outbound_net_device(device);
if (!net_device)
return -ENODEV;
ndev = net_device->ndev;
node = cpu_to_node(device->channel->target_cpu);
net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node);
if (!net_device->recv_buf)
net_device->recv_buf = vzalloc(net_device->recv_buf_size);
if (!net_device->recv_buf) {
netdev_err(ndev, "unable to allocate receive "
"buffer of size %d\n", net_device->recv_buf_size);
ret = -ENOMEM;
goto cleanup;
}
/*
* Establish the gpadl handle for this buffer on this
* channel. Note: This call uses the vmbus connection rather
* than the channel to establish the gpadl handle.
*/
ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf,
net_device->recv_buf_size,
&net_device->recv_buf_gpadl_handle);
if (ret != 0) {
netdev_err(ndev,
"unable to establish receive buffer's gpadl\n");
goto cleanup;
}
/* Notify the NetVsp of the gpadl handle */
init_packet = &net_device->channel_init_pkt;
memset(init_packet, 0, sizeof(struct nvsp_message));
init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
init_packet->msg.v1_msg.send_recv_buf.
gpadl_handle = net_device->recv_buf_gpadl_handle;
init_packet->msg.v1_msg.
send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
/* Send the gpadl notification request */
ret = vmbus_sendpacket(device->channel, init_packet,
sizeof(struct nvsp_message),
(unsigned long)init_packet,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret != 0) {
netdev_err(ndev,
"unable to send receive buffer's gpadl to netvsp\n");
goto cleanup;
}
t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
BUG_ON(t == 0);
/* Check the response */
if (init_packet->msg.v1_msg.
send_recv_buf_complete.status != NVSP_STAT_SUCCESS) {
netdev_err(ndev, "Unable to complete receive buffer "
"initialization with NetVsp - status %d\n",
init_packet->msg.v1_msg.
send_recv_buf_complete.status);
ret = -EINVAL;
goto cleanup;
}
/* Parse the response */
net_device->recv_section_cnt = init_packet->msg.
v1_msg.send_recv_buf_complete.num_sections;
net_device->recv_section = kmemdup(
init_packet->msg.v1_msg.send_recv_buf_complete.sections,
net_device->recv_section_cnt *
sizeof(struct nvsp_1_receive_buffer_section),
GFP_KERNEL);
if (net_device->recv_section == NULL) {
ret = -EINVAL;
goto cleanup;
}
/*
* For 1st release, there should only be 1 section that represents the
* entire receive buffer
*/
if (net_device->recv_section_cnt != 1 ||
net_device->recv_section->offset != 0) {
ret = -EINVAL;
goto cleanup;
}
/* Now setup the send buffer.
*/
net_device->send_buf = vzalloc_node(net_device->send_buf_size, node);
if (!net_device->send_buf)
net_device->send_buf = vzalloc(net_device->send_buf_size);
if (!net_device->send_buf) {
netdev_err(ndev, "unable to allocate send "
"buffer of size %d\n", net_device->send_buf_size);
ret = -ENOMEM;
goto cleanup;
}
/* Establish the gpadl handle for this buffer on this
* channel. Note: This call uses the vmbus connection rather
* than the channel to establish the gpadl handle.
*/
ret = vmbus_establish_gpadl(device->channel, net_device->send_buf,
net_device->send_buf_size,
&net_device->send_buf_gpadl_handle);
if (ret != 0) {
netdev_err(ndev,
"unable to establish send buffer's gpadl\n");
goto cleanup;
}
/* Notify the NetVsp of the gpadl handle */
init_packet = &net_device->channel_init_pkt;
memset(init_packet, 0, sizeof(struct nvsp_message));
init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF;
init_packet->msg.v1_msg.send_send_buf.gpadl_handle =
net_device->send_buf_gpadl_handle;
init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID;
/* Send the gpadl notification request */
ret = vmbus_sendpacket(device->channel, init_packet,
sizeof(struct nvsp_message),
(unsigned long)init_packet,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret != 0) {
netdev_err(ndev,
"unable to send send buffer's gpadl to netvsp\n");
goto cleanup;
}
t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ);
BUG_ON(t == 0);
/* Check the response */
if (init_packet->msg.v1_msg.
send_send_buf_complete.status != NVSP_STAT_SUCCESS) {
netdev_err(ndev, "Unable to complete send buffer "
"initialization with NetVsp - status %d\n",
init_packet->msg.v1_msg.
send_send_buf_complete.status);
ret = -EINVAL;
goto cleanup;
}
/* Parse the response */
net_device->send_section_size = init_packet->msg.
v1_msg.send_send_buf_complete.section_size;
/* Section count is simply the size divided by the section size.
*/
net_device->send_section_cnt =
net_device->send_buf_size/net_device->send_section_size;
dev_info(&device->device, "Send section size: %d, Section count:%d\n",
net_device->send_section_size, net_device->send_section_cnt);
/* Setup state for managing the send buffer. */
net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt,
BITS_PER_LONG);
net_device->send_section_map =
kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL);
if (net_device->send_section_map == NULL) {
ret = -ENOMEM;
goto cleanup;
}
goto exit;
cleanup:
netvsc_destroy_buf(net_device);
exit:
return ret;
}
static void netvsc_disconnect_vsp(struct netvsc_device *net_device)
{
netvsc_destroy_buf(net_device);
}
static void netvsc_disconnect_vsp(struct hv_device *device)
{
netvsc_destroy_buf(device);
}