net/sfc/base: report support for Tx checksum op descriptors

FreeBSD driver needs a patch to provide a means for packets
which do not need checksum offload but have flow ID set
to avoid hitting only the first Tx queue (which has been used
for packets not needing checksum offload).

This should be possible on Huntington, Medford or Medford2 chips
since these support toggling checksum offload on any given queue
dynamically by means of pushing option descriptors.

The patch for FreeBSD driver will then need a means to figure out
whether the feature can be used, and testing adapter family might
not be a good solution.

This patch adds a feature bit specifically to indicate support
for checksum option descriptors. The new feature bits may have
more users in future, apart from the mentioned FreeBSD patch.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>

diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index 97c4846..a612b69 100644 (file)
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -1233,6 +1233,7 @@ efx_bist_stop(
 #define        EFX_FEATURE_FW_ASSISTED_TSO     0x00001000
 #define        EFX_FEATURE_FW_ASSISTED_TSO_V2  0x00002000
 #define        EFX_FEATURE_PACKED_STREAM       0x00004000
+#define        EFX_FEATURE_TXQ_CKSUM_OP_DESC   0x00008000
 
 typedef enum efx_tunnel_protocol_e {
        EFX_TUNNEL_PROTOCOL_NONE = 0,

diff --git a/drivers/net/sfc/base/efx_nic.c b/drivers/net/sfc/base/efx_nic.c
index cea32b7..52108a5 100644 (file)
--- a/drivers/net/sfc/base/efx_nic.c
+++ b/drivers/net/sfc/base/efx_nic.c
@@ -228,7 +228,8 @@ efx_nic_create(
                    EFX_FEATURE_PIO_BUFFERS |
                    EFX_FEATURE_FW_ASSISTED_TSO |
                    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-                   EFX_FEATURE_PACKED_STREAM;
+                   EFX_FEATURE_PACKED_STREAM |
+                   EFX_FEATURE_TXQ_CKSUM_OP_DESC;
                break;
 #endif /* EFSYS_OPT_HUNTINGTON */
 
@@ -248,7 +249,8 @@ efx_nic_create(
                    EFX_FEATURE_MCDI_DMA |
                    EFX_FEATURE_PIO_BUFFERS |
                    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-                   EFX_FEATURE_PACKED_STREAM;
+                   EFX_FEATURE_PACKED_STREAM |
+                   EFX_FEATURE_TXQ_CKSUM_OP_DESC;
                break;
 #endif /* EFSYS_OPT_MEDFORD */
 
@@ -264,7 +266,8 @@ efx_nic_create(
                    EFX_FEATURE_MCDI_DMA |
                    EFX_FEATURE_PIO_BUFFERS |
                    EFX_FEATURE_FW_ASSISTED_TSO_V2 |
-                   EFX_FEATURE_PACKED_STREAM;
+                   EFX_FEATURE_PACKED_STREAM |
+                   EFX_FEATURE_TXQ_CKSUM_OP_DESC;
                break;
 #endif /* EFSYS_OPT_MEDFORD2 */