net/hyperv/netvsc.c

104 	/* Avoid deadlock with device removal already under RTNL */
178 static void netvsc_revoke_recv_buf(struct hv_device *device,
203 		ret = vmbus_sendpacket(device->channel,
213 		if (device->channel->rescind)
228 static void netvsc_revoke_send_buf(struct hv_device *device,
253 		ret = vmbus_sendpacket(device->channel,
264 		if (device->channel->rescind)
279 static void netvsc_teardown_recv_gpadl(struct hv_device *device,
286 		ret = vmbus_teardown_gpadl(device->channel,
300 static void netvsc_teardown_send_gpadl(struct hv_device *device,
307 		ret = vmbus_teardown_gpadl(device->channel,
335 static int netvsc_init_buf(struct hv_device *device,
340 	struct net_device *ndev = hv_get_drvdata(device);
370 	ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf,
391 	ret = vmbus_sendpacket(device->channel, init_packet,
473 	ret = vmbus_establish_gpadl(device->channel, net_device->send_buf,
493 	ret = vmbus_sendpacket(device->channel, init_packet,
544 	netvsc_revoke_recv_buf(device, net_device, ndev);
545 	netvsc_revoke_send_buf(device, net_device, ndev);
546 	netvsc_teardown_recv_gpadl(device, net_device, ndev);
547 	netvsc_teardown_send_gpadl(device, net_device, ndev);
554 static int negotiate_nvsp_ver(struct hv_device *device,
559 	struct net_device *ndev = hv_get_drvdata(device);
569 	ret = vmbus_sendpacket(device->channel, init_packet,
608 	ret = vmbus_sendpacket(device->channel, init_packet,
616 static int netvsc_connect_vsp(struct hv_device *device,
620 	struct net_device *ndev = hv_get_drvdata(device);
633 		if (negotiate_nvsp_ver(device, net_device, init_packet,
672 	ret = vmbus_sendpacket(device->channel, init_packet,
680 	ret = netvsc_init_buf(device, net_device, device_info);
687  * netvsc_device_remove - Callback when the root bus device is removed
689 void netvsc_device_remove(struct hv_device *device)
691 	struct net_device *ndev = hv_get_drvdata(device);
701 	netvsc_revoke_recv_buf(device, net_device, ndev);
703 		netvsc_teardown_recv_gpadl(device, net_device, ndev);
705 	netvsc_revoke_send_buf(device, net_device, ndev);
707 		netvsc_teardown_send_gpadl(device, net_device, ndev);
711 	/* Disable NAPI and disassociate its context from the device. */
725 	netdev_dbg(ndev, "net device safe to remove\n");
728 	vmbus_close(device->channel);
735 		netvsc_teardown_recv_gpadl(device, net_device, ndev);
736 		netvsc_teardown_send_gpadl(device, net_device, ndev);
987 		dma_unmap_single(&hv_dev->device, packet->dma_range[i].dma,
1034 		dma = dma_map_single(&hv_dev->device, src, len,
1036 		if (dma_mapping_error(&hv_dev->device, dma)) {
1053 	struct hv_device *device,
1065 	struct net_device *ndev = hv_get_drvdata(device);
1190 	struct hv_device *device = ndev_ctx->device_ctx;
1200 	/* If device is rescinded, return error and packet will get dropped. */
1213 		return netvsc_send_pkt(device, packet, net_device, pb, skb);
1287 		int m_ret = netvsc_send_pkt(device, msd_send, net_device,
1298 		ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb);
1602 static int netvsc_process_raw_pkt(struct hv_device *device,
1652 	struct hv_device *device = netvsc_channel_to_device(channel);
1653 	struct net_device *ndev = hv_get_drvdata(device);
1664 		work_done += netvsc_process_raw_pkt(device, nvchan, net_device,
1714  * netvsc_device_add - Callback when the device belonging to this
1717 struct netvsc_device *netvsc_device_add(struct hv_device *device,
1722 	struct net_device *ndev = hv_get_drvdata(device);
1732 	/* Because the device uses NAPI, all the interrupt batching and
1735 	set_channel_read_mode(device->channel, HV_CALL_ISR);
1737 	/* If we're reopening the device we may have multiple queues, fill the
1747 		nvchan->channel = device->channel;
1772 	device->channel->next_request_id_callback = vmbus_next_request_id;
1773 	device->channel->request_addr_callback = vmbus_request_addr;
1774 	device->channel->rqstor_size = netvsc_rqstor_size(netvsc_ring_bytes);
1775 	device->channel->max_pkt_size = NETVSC_MAX_PKT_SIZE;
1777 	ret = vmbus_open(device->channel, netvsc_ring_bytes,
1792 	ret = netvsc_connect_vsp(device, net_device, device_info);
1811 	vmbus_close(device->channel);