[dpdk-dev] [PATCH 20/23] net/sfc/base: get max supported value for action MARK

[Andrew Rybchenko <arybchenko@solarflare.com>]

From: Roman Zhukov <Roman.Zhukov@oktetlabs.ru>

The mark value for MATCH_ACTION_MARK has a maximum value.
Requesting a value larger than the maximum will cause the
filter insertion to fail with EINVAL. This patch allows the
driver to check the value at the filter validation.

Signed-off-by: Roman Zhukov <Roman.Zhukov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 drivers/net/sfc/base/ef10_nic.c  | 11 +++++++++--
 drivers/net/sfc/base/efx.h       |  1 +
 drivers/net/sfc/base/siena_nic.c |  1 +
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/sfc/base/ef10_nic.c b/drivers/net/sfc/base/ef10_nic.c
index b28226d..44286db 100644
--- a/drivers/net/sfc/base/ef10_nic.c
+++ b/drivers/net/sfc/base/ef10_nic.c
@@ -996,7 +996,7 @@ ef10_get_datapath_caps(
 	efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 	efx_mcdi_req_t req;
 	uint8_t payload[MAX(MC_CMD_GET_CAPABILITIES_IN_LEN,
-			    MC_CMD_GET_CAPABILITIES_V4_OUT_LEN)];
+			    MC_CMD_GET_CAPABILITIES_V5_OUT_LEN)];
 	efx_rc_t rc;
 
 	if ((rc = ef10_mcdi_get_pf_count(enp, &encp->enc_hw_pf_count)) != 0)
@@ -1008,7 +1008,7 @@ ef10_get_datapath_caps(
 	req.emr_in_buf = payload;
 	req.emr_in_length = MC_CMD_GET_CAPABILITIES_IN_LEN;
 	req.emr_out_buf = payload;
-	req.emr_out_length = MC_CMD_GET_CAPABILITIES_V4_OUT_LEN;
+	req.emr_out_length = MC_CMD_GET_CAPABILITIES_V5_OUT_LEN;
 
 	efx_mcdi_execute_quiet(enp, &req);
 
@@ -1305,6 +1305,13 @@ ef10_get_datapath_caps(
 	else
 		encp->enc_filter_action_mark_supported = B_FALSE;
 
+	/* Get maximum supported value for "MARK" filter action */
+	if (req.emr_out_length_used >= MC_CMD_GET_CAPABILITIES_V5_OUT_LEN)
+		encp->enc_filter_action_mark_max = MCDI_OUT_DWORD(req,
+		    GET_CAPABILITIES_V5_OUT_FILTER_ACTION_MARK_MAX);
+	else
+		encp->enc_filter_action_mark_max = 0;
+
 #undef CAP_FLAGS1
 #undef CAP_FLAGS2
 
diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index f5ec568..332c6d0 100644
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -1296,6 +1296,7 @@ typedef struct efx_nic_cfg_s {
 	/* Firmware support for "FLAG" and "MARK" filter actions */
 	boolean_t		enc_filter_action_flag_supported;
 	boolean_t		enc_filter_action_mark_supported;
+	uint32_t		enc_filter_action_mark_max;
 } efx_nic_cfg_t;
 
 #define	EFX_PCI_FUNCTION_IS_PF(_encp)	((_encp)->enc_vf == 0xffff)
diff --git a/drivers/net/sfc/base/siena_nic.c b/drivers/net/sfc/base/siena_nic.c
index b703369..31eef80 100644
--- a/drivers/net/sfc/base/siena_nic.c
+++ b/drivers/net/sfc/base/siena_nic.c
@@ -174,6 +174,7 @@ siena_board_cfg(
 
 	encp->enc_filter_action_flag_supported = B_FALSE;
 	encp->enc_filter_action_mark_supported = B_FALSE;
+	encp->enc_filter_action_mark_max = 0;
 
 	return (0);
 
-- 
2.7.4