IB/core: Expose vlan offloads capabilities

Expose raw packet capabilities in the core layer to enable a device
to report it.
Two existing capabilities, scatter FCS and IP CSUM were added to this
field for a better user experience by exposing the raw packet caps
from one location.
This field will serve also for future capabilities for raw packet QP.

A new capability was introduced - cvlan stripping, which is the
device's ability to remove cvlan tag from an incoming packet and
report it in the matching work completion.

Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

include/rdma/ib_verbs.h

@@ -207,6 +207,7 @@ enum ib_device_cap_flags {
 	IB_DEVICE_MEM_WINDOW_TYPE_2A		= (1 << 23),
 	IB_DEVICE_MEM_WINDOW_TYPE_2B		= (1 << 24),
 	IB_DEVICE_RC_IP_CSUM			= (1 << 25),
+	/* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */
 	IB_DEVICE_RAW_IP_CSUM			= (1 << 26),
 	/*
 	 * Devices should set IB_DEVICE_CROSS_CHANNEL if they
@@ -220,6 +221,7 @@ enum ib_device_cap_flags {
 	IB_DEVICE_ON_DEMAND_PAGING		= (1ULL << 31),
 	IB_DEVICE_SG_GAPS_REG			= (1ULL << 32),
 	IB_DEVICE_VIRTUAL_FUNCTION		= (1ULL << 33),
+	/* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */
 	IB_DEVICE_RAW_SCATTER_FCS		= (1ULL << 34),
 };
 
@@ -330,6 +332,7 @@ struct ib_device_attr {
 	uint64_t		hca_core_clock; /* in KHZ */
 	struct ib_rss_caps	rss_caps;
 	u32			max_wq_type_rq;
+	u32			raw_packet_caps; /* Use ib_raw_packet_caps enum */
 };
 
 enum ib_mtu {
@@ -1456,6 +1459,18 @@ struct ib_srq {
 	} ext;
 };
 
+enum ib_raw_packet_caps {
+	/* Strip cvlan from incoming packet and report it in the matching work
+	 * completion is supported.
+	 */
+	IB_RAW_PACKET_CAP_CVLAN_STRIPPING	= (1 << 0),
+	/* Scatter FCS field of an incoming packet to host memory is supported.
+	 */
+	IB_RAW_PACKET_CAP_SCATTER_FCS		= (1 << 1),
+	/* Checksum offloads are supported (for both send and receive). */
+	IB_RAW_PACKET_CAP_IP_CSUM		= (1 << 2),
+};
+
 enum ib_wq_type {
 	IB_WQT_RQ
 };