diff options
Diffstat (limited to 'drivers/net/qede/base/eth_common.h')
| -rw-r--r-- | drivers/net/qede/base/eth_common.h | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/drivers/net/qede/base/eth_common.h b/drivers/net/qede/base/eth_common.h index 32130709..6dc969b0 100644 --- a/drivers/net/qede/base/eth_common.h +++ b/drivers/net/qede/base/eth_common.h @@ -34,6 +34,14 @@ #define ETH_RX_CQE_PAGE_SIZE_BYTES 4096 #define ETH_RX_NUM_NEXT_PAGE_BDS 2 +/* Limitation for Tunneled LSO Packets on the offset (in bytes) of the inner IP + * header (relevant to LSO for tunneled packet): + */ +/* Offset is limited to 253 bytes (inclusive). */ +#define ETH_MAX_TUNN_LSO_INNER_IPV4_OFFSET 253 +/* Offset is limited to 251 bytes (inclusive). */ +#define ETH_MAX_TUNN_LSO_INNER_IPV6_OFFSET 251 + #define ETH_TX_MIN_BDS_PER_NON_LSO_PKT 1 #define ETH_TX_MAX_BDS_PER_NON_LSO_PACKET 18 #define ETH_TX_MAX_BDS_PER_LSO_PACKET 255 @@ -141,16 +149,23 @@ struct eth_tx_1st_bd_flags { /* Do not allow additional VLAN manipulations on this packet. */ #define ETH_TX_1ST_BD_FLAGS_FORCE_VLAN_MODE_MASK 0x1 #define ETH_TX_1ST_BD_FLAGS_FORCE_VLAN_MODE_SHIFT 1 -/* IP checksum recalculation in needed */ +/* Recalculate IP checksum. For tunneled packet - relevant to inner header. */ #define ETH_TX_1ST_BD_FLAGS_IP_CSUM_MASK 0x1 #define ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT 2 -/* TCP/UDP checksum recalculation in needed */ +/* Recalculate TCP/UDP checksum. + * For tunneled packet - relevant to inner header. + */ #define ETH_TX_1ST_BD_FLAGS_L4_CSUM_MASK 0x1 #define ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT 3 -/* If set, need to add the VLAN in vlan field to the packet. */ +/* If set, insert VLAN tag from vlan field to the packet. + * For tunneled packet - relevant to outer header. + */ #define ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_MASK 0x1 #define ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT 4 -/* If set, this is an LSO packet. */ +/* If set, this is an LSO packet. Note: For Tunneled LSO packets, the offset of + * the inner IPV4 (and IPV6) header is limited to 253 (and 251 respectively) + * bytes, inclusive. + */ #define ETH_TX_1ST_BD_FLAGS_LSO_MASK 0x1 #define ETH_TX_1ST_BD_FLAGS_LSO_SHIFT 5 /* Recalculate Tunnel IP Checksum (if Tunnel IP Header is IPv4) */ @@ -165,8 +180,9 @@ struct eth_tx_1st_bd_flags { * The parsing information data for the first tx bd of a given packet. */ struct eth_tx_data_1st_bd { - __le16 vlan /* VLAN tag to insert to packet (if needed). */; -/* Number of BDs in packet. Should be at least 2 in non-LSO packet and at least +/* VLAN tag to insert to packet (if enabled by vlan_insertion flag). */ + __le16 vlan; +/* Number of BDs in packet. Should be at least 1 in non-LSO packet and at least * 3 in LSO (or Tunnel with IPv6+ext) packet. */ u8 nbds; @@ -209,10 +225,14 @@ struct eth_tx_data_2nd_bd { /* For LSO / Tunnel header with IPv6+ext - Set if inner header is IPv6 */ #define ETH_TX_DATA_2ND_BD_TUNN_INNER_IPV6_MASK 0x1 #define ETH_TX_DATA_2ND_BD_TUNN_INNER_IPV6_SHIFT 11 -/* For LSO / Tunnel header with IPv6+ext - Set if outer header has IPv6+ext */ +/* In tunneling mode - Set to 1 when the Inner header is IPv6 with extension. + * Otherwise set to 1 if the header is IPv6 with extension. + */ #define ETH_TX_DATA_2ND_BD_IPV6_EXT_MASK 0x1 #define ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT 12 -/* Set if Tunnel header has IPv6 ext. (3rd BD is required) */ +/* Set to 1 if Tunnel (outer = encapsulating) header has IPv6 ext. (Note: 3rd BD + * is required, hence EDPM does not support Tunnel [outer] header with Ipv6Ext) + */ #define ETH_TX_DATA_2ND_BD_TUNN_IPV6_EXT_MASK 0x1 #define ETH_TX_DATA_2ND_BD_TUNN_IPV6_EXT_SHIFT 13 /* Set if (inner) L4 protocol is UDP. (Required when IPv6+ext (or tunnel with |