Merge branch 'hyperv-next'

K. Y. Srinivasan says:

====================
Drivers: net: hyperv: Enable various offloads

This patch set enables both checksum as well as segmentation offload.
As part of this effort I have enabled scatter gather I/O a well.

In version 2 of these patches, I addressed comments from David Miller and
Dan Carpenter.

In this version I have addressed the latest comments from David Miller.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hyperv/hyperv_net.h

@@ -30,6 +30,7 @@
 
 /* Fwd declaration */
 struct hv_netvsc_packet;
+struct ndis_tcp_ip_checksum_info;
 
 /* Represent the xfer page packet which contains 1 or more netvsc packet */
 struct xferpage_packet {
@@ -73,7 +74,7 @@ struct hv_netvsc_packet {
 	} completion;
 
 	/* This points to the memory after page_buf */
-	void *extension;
+	struct rndis_message *rndis_msg;
 
 	u32 total_data_buflen;
 	/* Points to the send/receive buffer where the ethernet frame is */
@@ -117,7 +118,8 @@ int netvsc_send(struct hv_device *device,
 void netvsc_linkstatus_callback(struct hv_device *device_obj,
 				unsigned int status);
 int netvsc_recv_callback(struct hv_device *device_obj,
-			struct hv_netvsc_packet *packet);
+			struct hv_netvsc_packet *packet,
+			struct ndis_tcp_ip_checksum_info *csum_info);
 int rndis_filter_open(struct hv_device *dev);
 int rndis_filter_close(struct hv_device *dev);
 int rndis_filter_device_add(struct hv_device *dev,
@@ -126,11 +128,6 @@ void rndis_filter_device_remove(struct hv_device *dev);
 int rndis_filter_receive(struct hv_device *dev,
 			struct hv_netvsc_packet *pkt);
 
-
-
-int rndis_filter_send(struct hv_device *dev,
-			struct hv_netvsc_packet *pkt);
-
 int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter);
 int rndis_filter_set_device_mac(struct hv_device *hdev, char *mac);
 
@@ -726,9 +723,133 @@ struct ndis_pkt_8021q_info {
 	};
 };
 
+struct ndis_oject_header {
+	u8 type;
+	u8 revision;
+	u16 size;
+};
+
+#define NDIS_OBJECT_TYPE_DEFAULT	0x80
+#define NDIS_OFFLOAD_PARAMETERS_REVISION_3 3
+#define NDIS_OFFLOAD_PARAMETERS_NO_CHANGE 0
+#define NDIS_OFFLOAD_PARAMETERS_LSOV2_DISABLED 1
+#define NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED  2
+#define NDIS_OFFLOAD_PARAMETERS_LSOV1_ENABLED  2
+#define NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED 1
+#define NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED 2
+#define NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED 1
+#define NDIS_OFFLOAD_PARAMETERS_TX_ENABLED_RX_DISABLED 2
+#define NDIS_OFFLOAD_PARAMETERS_RX_ENABLED_TX_DISABLED 3
+#define NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED 4
+
+#define NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE	1
+#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4	0
+#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6	1
+
+/*
+ * New offload OIDs for NDIS 6
+ */
+#define OID_TCP_OFFLOAD_CURRENT_CONFIG 0xFC01020B /* query only */
+#define OID_TCP_OFFLOAD_PARAMETERS 0xFC01020C		/* set only */
+#define OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020D/* query only */
+#define OID_TCP_CONNECTION_OFFLOAD_CURRENT_CONFIG 0xFC01020E /* query only */
+#define OID_TCP_CONNECTION_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020F /* query */
+#define OID_OFFLOAD_ENCAPSULATION 0x0101010A /* set/query */
+
+struct ndis_offload_params {
+	struct ndis_oject_header header;
+	u8 ip_v4_csum;
+	u8 tcp_ip_v4_csum;
+	u8 udp_ip_v4_csum;
+	u8 tcp_ip_v6_csum;
+	u8 udp_ip_v6_csum;
+	u8 lso_v1;
+	u8 ip_sec_v1;
+	u8 lso_v2_ipv4;
+	u8 lso_v2_ipv6;
+	u8 tcp_connection_ip_v4;
+	u8 tcp_connection_ip_v6;
+	u32 flags;
+	u8 ip_sec_v2;
+	u8 ip_sec_v2_ip_v4;
+	struct {
+		u8 rsc_ip_v4;
+		u8 rsc_ip_v6;
+	};
+	struct {
+		u8 encapsulated_packet_task_offload;
+		u8 encapsulation_types;
+	};
+};
+
+struct ndis_tcp_ip_checksum_info {
+	union {
+		struct {
+			u32 is_ipv4:1;
+			u32 is_ipv6:1;
+			u32 tcp_checksum:1;
+			u32 udp_checksum:1;
+			u32 ip_header_checksum:1;
+			u32 reserved:11;
+			u32 tcp_header_offset:10;
+		} transmit;
+		struct {
+			u32 tcp_checksum_failed:1;
+			u32 udp_checksum_failed:1;
+			u32 ip_checksum_failed:1;
+			u32 tcp_checksum_succeeded:1;
+			u32 udp_checksum_succeeded:1;
+			u32 ip_checksum_succeeded:1;
+			u32 loopback:1;
+			u32 tcp_checksum_value_invalid:1;
+			u32 ip_checksum_value_invalid:1;
+		} receive;
+		u32  value;
+	};
+};
+
+struct ndis_tcp_lso_info {
+	union {
+		struct {
+			u32 unused:30;
+			u32 type:1;
+			u32 reserved2:1;
+		} transmit;
+		struct {
+			u32 mss:20;
+			u32 tcp_header_offset:10;
+			u32 type:1;
+			u32 reserved2:1;
+		} lso_v1_transmit;
+		struct {
+			u32 tcp_payload:30;
+			u32 type:1;
+			u32 reserved2:1;
+		} lso_v1_transmit_complete;
+		struct {
+			u32 mss:20;
+			u32 tcp_header_offset:10;
+			u32 type:1;
+			u32 ip_version:1;
+		} lso_v2_transmit;
+		struct {
+			u32 reserved:30;
+			u32 type:1;
+			u32 reserved2:1;
+		} lso_v2_transmit_complete;
+		u32  value;
+	};
+};
+
 #define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
 		sizeof(struct ndis_pkt_8021q_info))
 
+#define NDIS_CSUM_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
+		sizeof(struct ndis_tcp_ip_checksum_info))
+
+#define NDIS_LSO_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
+		sizeof(struct ndis_tcp_lso_info))
+
 /* Format of Information buffer passed in a SetRequest for the OID */
 /* OID_GEN_RNDIS_CONFIG_PARAMETER. */
 struct rndis_config_parameter_info {
@@ -954,6 +1075,16 @@ struct rndis_message {
 #define NDIS_PACKET_TYPE_FUNCTIONAL	0x00000400
 #define NDIS_PACKET_TYPE_MAC_FRAME	0x00000800
 
+#define INFO_IPV4       2
+#define INFO_IPV6       4
+#define INFO_TCP        2
+#define INFO_UDP        4
+
+#define TRANSPORT_INFO_NOT_IP   0
+#define TRANSPORT_INFO_IPV4_TCP ((INFO_IPV4 << 16) | INFO_TCP)
+#define TRANSPORT_INFO_IPV4_UDP ((INFO_IPV4 << 16) | INFO_UDP)
+#define TRANSPORT_INFO_IPV6_TCP ((INFO_IPV6 << 16) | INFO_TCP)
+#define TRANSPORT_INFO_IPV6_UDP ((INFO_IPV6 << 16) | INFO_UDP)
 
 
 #endif /* _HYPERV_NET_H */

drivers/net/hyperv/rndis_filter.c

@@ -350,6 +350,7 @@ static void rndis_filter_receive_data(struct rndis_device *dev,
 	struct rndis_packet *rndis_pkt;
 	u32 data_offset;
 	struct ndis_pkt_8021q_info *vlan;
+	struct ndis_tcp_ip_checksum_info *csum_info;
 
 	rndis_pkt = &msg->msg.pkt;
 
@@ -388,7 +389,8 @@ static void rndis_filter_receive_data(struct rndis_device *dev,
 		pkt->vlan_tci = 0;
 	}
 
-	netvsc_recv_callback(dev->net_dev->dev, pkt);
+	csum_info = rndis_get_ppi(rndis_pkt, TCPIP_CHKSUM_PKTINFO);
+	netvsc_recv_callback(dev->net_dev->dev, pkt, csum_info);
 }
 
 int rndis_filter_receive(struct hv_device *dev,
@@ -607,6 +609,61 @@ int rndis_filter_set_device_mac(struct hv_device *hdev, char *mac)
 	return ret;
 }
 
+int rndis_filter_set_offload_params(struct hv_device *hdev,
+				struct ndis_offload_params *req_offloads)
+{
+	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 ndis_offload_params *offload_params;
+	struct rndis_set_complete *set_complete;
+	u32 extlen = sizeof(struct ndis_offload_params);
+	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 = 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;
+
+	t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
+	if (t == 0) {
+		netdev_err(ndev, "timeout before we got aOFFLOAD 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)
 {
@@ -807,6 +864,7 @@ int rndis_filter_device_add(struct hv_device *dev,
 	struct netvsc_device *net_device;
 	struct rndis_device *rndis_device;
 	struct netvsc_device_info *device_info = additional_info;
+	struct ndis_offload_params offloads;
 
 	rndis_device = get_rndis_device();
 	if (!rndis_device)
@@ -846,6 +904,26 @@ int rndis_filter_device_add(struct hv_device *dev,
 
 	memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
 
+	/* Turn on the offloads; the host supports all of the relevant
+	 * offloads.
+	 */
+	memset(&offloads, 0, sizeof(struct ndis_offload_params));
+	/* A value of zero means "no change"; now turn on what we
+	 * want.
+	 */
+	offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
+	offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
+	offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
+	offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
+	offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED;
+	offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED;
+
+
+	ret = rndis_filter_set_offload_params(dev, &offloads);
+	if (ret)
+		goto err_dev_remv;
+
+
 	rndis_filter_query_device_link_status(rndis_device);
 
 	device_info->link_state = rndis_device->link_state;
@@ -855,6 +933,10 @@ int rndis_filter_device_add(struct hv_device *dev,
 		 device_info->link_state ? "down" : "up");
 
 	return ret;
+
+err_dev_remv:
+	rndis_filter_device_remove(dev);
+	return ret;
 }
 
 void rndis_filter_device_remove(struct hv_device *dev)
@@ -891,69 +973,3 @@ int rndis_filter_close(struct hv_device *dev)
 
 	return rndis_filter_close_device(nvdev->extension);
 }
-
-int rndis_filter_send(struct hv_device *dev,
-			     struct hv_netvsc_packet *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 */
-	rndis_msg = (struct rndis_message *)pkt->extension;
-
-	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;
-	}
-
-	return netvsc_send(dev, pkt);
-}