/*
* Net VSC initialize receive buffer with net VSP
*
* Net VSP: Network virtual services client, also known as the
* Hyper-V extensible switch and the synthetic data path.
*/
static int
hv_nv_init_rx_buffer_with_net_vsp(struct hv_device *device)
{
netvsc_dev *net_dev;
nvsp_msg *init_pkt;
int ret = 0;
net_dev = hv_nv_get_outbound_net_device(device);
if (!net_dev) {
return (ENODEV);
}
net_dev->rx_buf = contigmalloc(net_dev->rx_buf_size, M_NETVSC,
M_ZERO, 0UL, BUS_SPACE_MAXADDR, PAGE_SIZE, 0);
/*
* 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.
* GPADL: Guest physical address descriptor list.
*/
ret = hv_vmbus_channel_establish_gpadl(
device->channel, net_dev->rx_buf,
net_dev->rx_buf_size, &net_dev->rx_buf_gpadl_handle);
if (ret != 0) {
goto cleanup;
}
/* sema_wait(&ext->channel_init_sema); KYS CHECK */
/* Notify the NetVsp of the gpadl handle */
init_pkt = &net_dev->channel_init_packet;
memset(init_pkt, 0, sizeof(nvsp_msg));
init_pkt->hdr.msg_type = nvsp_msg_1_type_send_rx_buf;
init_pkt->msgs.vers_1_msgs.send_rx_buf.gpadl_handle =
net_dev->rx_buf_gpadl_handle;
init_pkt->msgs.vers_1_msgs.send_rx_buf.id =
NETVSC_RECEIVE_BUFFER_ID;
/* Send the gpadl notification request */
ret = hv_vmbus_channel_send_packet(device->channel, init_pkt,
sizeof(nvsp_msg), (uint64_t)(uintptr_t)init_pkt,
HV_VMBUS_PACKET_TYPE_DATA_IN_BAND,
HV_VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret != 0) {
goto cleanup;
}
sema_wait(&net_dev->channel_init_sema);
/* Check the response */
if (init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.status
!= nvsp_status_success) {
ret = EINVAL;
goto cleanup;
}
net_dev->rx_section_count =
init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.num_sections;
net_dev->rx_sections = malloc(net_dev->rx_section_count *
sizeof(nvsp_1_rx_buf_section), M_NETVSC, M_WAITOK);
memcpy(net_dev->rx_sections,
init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.sections,
net_dev->rx_section_count * sizeof(nvsp_1_rx_buf_section));
/*
* For first release, there should only be 1 section that represents
* the entire receive buffer
*/
if (net_dev->rx_section_count != 1
|| net_dev->rx_sections->offset != 0) {
ret = EINVAL;
goto cleanup;
}
goto exit;
cleanup:
hv_nv_destroy_rx_buffer(net_dev);
exit:
return (ret);
}
/*
* Net VSC disconnect from VSP
*/
static void
hv_nv_disconnect_from_vsp(netvsc_dev *net_dev)
{
hv_nv_destroy_rx_buffer(net_dev);
hv_nv_destroy_send_buffer(net_dev);
}
/*
* Net VSC initialize receive buffer with net VSP
*
* Net VSP: Network virtual services client, also known as the
* Hyper-V extensible switch and the synthetic data path.
*/
static int
hv_nv_init_rx_buffer_with_net_vsp(struct hn_softc *sc)
{
netvsc_dev *net_dev;
nvsp_msg *init_pkt;
int ret = 0;
net_dev = hv_nv_get_outbound_net_device(sc);
if (!net_dev) {
return (ENODEV);
}
net_dev->rx_buf = hyperv_dmamem_alloc(bus_get_dma_tag(sc->hn_dev),
PAGE_SIZE, 0, net_dev->rx_buf_size, &net_dev->rxbuf_dma,
BUS_DMA_WAITOK | BUS_DMA_ZERO);
if (net_dev->rx_buf == NULL) {
device_printf(sc->hn_dev, "allocate rxbuf failed\n");
return ENOMEM;
}
/*
* Connect the RXBUF GPADL to the primary channel.
*
* NOTE:
* Only primary channel has RXBUF connected to it. Sub-channels
* just share this RXBUF.
*/
ret = vmbus_chan_gpadl_connect(sc->hn_prichan,
net_dev->rxbuf_dma.hv_paddr, net_dev->rx_buf_size,
&net_dev->rx_buf_gpadl_handle);
if (ret != 0) {
device_printf(sc->hn_dev, "rxbuf gpadl connect failed: %d\n",
ret);
goto cleanup;
}
/* sema_wait(&ext->channel_init_sema); KYS CHECK */
/* Notify the NetVsp of the gpadl handle */
init_pkt = &net_dev->channel_init_packet;
memset(init_pkt, 0, sizeof(nvsp_msg));
init_pkt->hdr.msg_type = nvsp_msg_1_type_send_rx_buf;
init_pkt->msgs.vers_1_msgs.send_rx_buf.gpadl_handle =
net_dev->rx_buf_gpadl_handle;
init_pkt->msgs.vers_1_msgs.send_rx_buf.id =
NETVSC_RECEIVE_BUFFER_ID;
/* Send the gpadl notification request */
ret = vmbus_chan_send(sc->hn_prichan,
VMBUS_CHANPKT_TYPE_INBAND, VMBUS_CHANPKT_FLAG_RC,
init_pkt, sizeof(nvsp_msg), (uint64_t)(uintptr_t)init_pkt);
if (ret != 0) {
goto cleanup;
}
sema_wait(&net_dev->channel_init_sema);
/* Check the response */
if (init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.status
!= nvsp_status_success) {
ret = EINVAL;
goto cleanup;
}
net_dev->rx_section_count =
init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.num_sections;
net_dev->rx_sections = malloc(net_dev->rx_section_count *
sizeof(nvsp_1_rx_buf_section), M_NETVSC, M_WAITOK);
memcpy(net_dev->rx_sections,
init_pkt->msgs.vers_1_msgs.send_rx_buf_complete.sections,
net_dev->rx_section_count * sizeof(nvsp_1_rx_buf_section));
/*
* For first release, there should only be 1 section that represents
* the entire receive buffer
*/
if (net_dev->rx_section_count != 1
|| net_dev->rx_sections->offset != 0) {
ret = EINVAL;
goto cleanup;
}
goto exit;
cleanup:
hv_nv_destroy_rx_buffer(net_dev);
exit:
return (ret);
}