Drivers: net: hyperv: Enable offloads on the host

Prior to enabling guest side offloads, enable the offloads on the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 135 insertions, 0 deletions

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 694bf7cada90..8bc4e766589b 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -721,6 +721,61 @@ 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
+
+/*
+ * 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;
+        };
+};
+
 #define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
                 sizeof(struct ndis_pkt_8021q_info))
 
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index eaa149950af7..42bfb3a11efd 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -607,6 +607,61 @@ cleanup:
         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 +862,7 @@ 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 +902,26 @@ 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 +931,10 @@ 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)