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Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c')
-rw-r--r--drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c115
1 files changed, 50 insertions, 65 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
index e055e000131b..502666f28124 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
@@ -1,31 +1,5 @@
-/*******************************************************************************
-
- Intel 10 Gigabit PCI Express Linux driver
- Copyright(c) 1999 - 2013 Intel Corporation.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms and conditions of the GNU General Public License,
- version 2, as published by the Free Software Foundation.
-
- This program is distributed in the hope it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
-
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-
- The full GNU General Public License is included in this distribution in
- the file called "COPYING".
-
- Contact Information:
- Linux NICS <linux.nics@intel.com>
- e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
- Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
-
-*******************************************************************************/
-
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 1999 - 2018 Intel Corporation. */
#include "ixgbe.h"
#include "ixgbe_type.h"
@@ -39,8 +13,12 @@
* are the smallest unit programmable into the underlying
* hardware. The IEEE 802.1Qaz specification do not use bandwidth
* groups so this is much simplified from the CEE case.
+ * @bw: bandwidth index by traffic class
+ * @refill: refill credits index by traffic class
+ * @max: max credits by traffic class
+ * @max_frame: maximum frame size
*/
-static s32 ixgbe_ieee_credits(__u8 *bw, __u16 *refill,
+static int ixgbe_ieee_credits(__u8 *bw, __u16 *refill,
__u16 *max, int max_frame)
{
int min_percent = 100;
@@ -72,14 +50,16 @@ static s32 ixgbe_ieee_credits(__u8 *bw, __u16 *refill,
/**
* ixgbe_dcb_calculate_tc_credits - Calculates traffic class credits
- * @ixgbe_dcb_config: Struct containing DCB settings.
- * @direction: Configuring either Tx or Rx.
+ * @hw: pointer to hardware structure
+ * @dcb_config: Struct containing DCB settings
+ * @max_frame: Maximum frame size
+ * @direction: Configuring either Tx or Rx
*
* This function calculates the credits allocated to each traffic class.
* It should be called only after the rules are checked by
* ixgbe_dcb_check_config().
*/
-s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
+int ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
struct ixgbe_dcb_config *dcb_config,
int max_frame, u8 direction)
{
@@ -87,7 +67,6 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
int min_credit;
int min_multiplier;
int min_percent = 100;
- s32 ret_val = 0;
/* Initialization values default for Tx settings */
u32 credit_refill = 0;
u32 credit_max = 0;
@@ -95,10 +74,8 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
u8 bw_percent = 0;
u8 i;
- if (dcb_config == NULL) {
- ret_val = DCB_ERR_CONFIG;
- goto out;
- }
+ if (!dcb_config)
+ return DCB_ERR_CONFIG;
min_credit = ((max_frame / 2) + DCB_CREDIT_QUANTUM - 1) /
DCB_CREDIT_QUANTUM;
@@ -142,6 +119,11 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
/* Calculate credit refill ratio using multiplier */
credit_refill = min(link_percentage * min_multiplier,
MAX_CREDIT_REFILL);
+
+ /* Refill at least minimum credit */
+ if (credit_refill < min_credit)
+ credit_refill = min_credit;
+
p->data_credits_refill = (u16)credit_refill;
/* Calculate maximum credit for the TC */
@@ -152,7 +134,7 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
* of a TC is too small, the maximum credit may not be
* enough to send out a jumbo frame in data plane arbitration.
*/
- if (credit_max && (credit_max < min_credit))
+ if (credit_max < min_credit)
credit_max = min_credit;
if (direction == DCB_TX_CONFIG) {
@@ -174,8 +156,7 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
p->data_credits_max = (u16)credit_max;
}
-out:
- return ret_val;
+ return 0;
}
void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en)
@@ -185,7 +166,7 @@ void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en)
for (*pfc_en = 0, tc = 0; tc < MAX_TRAFFIC_CLASS; tc++) {
if (tc_config[tc].dcb_pfc != pfc_disabled)
- *pfc_en |= 1 << tc;
+ *pfc_en |= BIT(tc);
}
}
@@ -231,12 +212,12 @@ void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *cfg, int direction,
u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *cfg, int direction, u8 up)
{
struct tc_configuration *tc_config = &cfg->tc_config[0];
- u8 prio_mask = 1 << up;
+ u8 prio_mask = BIT(up);
u8 tc = cfg->num_tcs.pg_tcs;
/* If tc is 0 then DCB is likely not enabled or supported */
if (!tc)
- goto out;
+ return 0;
/*
* Test from maximum TC to 1 and report the first match we find. If
@@ -247,7 +228,7 @@ u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *cfg, int direction, u8 up)
if (prio_mask & tc_config[tc].path[direction].up_to_tc_bitmap)
break;
}
-out:
+
return tc;
}
@@ -266,10 +247,9 @@ void ixgbe_dcb_unpack_map(struct ixgbe_dcb_config *cfg, int direction, u8 *map)
*
* Configure dcb settings and enable dcb mode.
*/
-s32 ixgbe_dcb_hw_config(struct ixgbe_hw *hw,
- struct ixgbe_dcb_config *dcb_config)
+int ixgbe_dcb_hw_config(struct ixgbe_hw *hw,
+ struct ixgbe_dcb_config *dcb_config)
{
- s32 ret = 0;
u8 pfc_en;
u8 ptype[MAX_TRAFFIC_CLASS];
u8 bwgid[MAX_TRAFFIC_CLASS];
@@ -287,40 +267,40 @@ s32 ixgbe_dcb_hw_config(struct ixgbe_hw *hw,
switch (hw->mac.type) {
case ixgbe_mac_82598EB:
- ret = ixgbe_dcb_hw_config_82598(hw, pfc_en, refill, max,
- bwgid, ptype);
- break;
+ return ixgbe_dcb_hw_config_82598(hw, pfc_en, refill, max,
+ bwgid, ptype);
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
- ret = ixgbe_dcb_hw_config_82599(hw, pfc_en, refill, max,
- bwgid, ptype, prio_tc);
- break;
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ case ixgbe_mac_x550em_a:
+ return ixgbe_dcb_hw_config_82599(hw, pfc_en, refill, max,
+ bwgid, ptype, prio_tc);
default:
break;
}
- return ret;
+ return 0;
}
/* Helper routines to abstract HW specifics from DCB netlink ops */
-s32 ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
+int ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
{
- int ret = -EINVAL;
-
switch (hw->mac.type) {
case ixgbe_mac_82598EB:
- ret = ixgbe_dcb_config_pfc_82598(hw, pfc_en);
- break;
+ return ixgbe_dcb_config_pfc_82598(hw, pfc_en);
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
- ret = ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
- break;
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ case ixgbe_mac_x550em_a:
+ return ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
default:
break;
}
- return ret;
+ return -EINVAL;
}
-s32 ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
+int ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
{
__u16 refill[IEEE_8021QAZ_MAX_TCS], max[IEEE_8021QAZ_MAX_TCS];
__u8 prio_type[IEEE_8021QAZ_MAX_TCS];
@@ -353,7 +333,7 @@ s32 ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
bwg_id, prio_type, ets->prio_tc);
}
-s32 ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw,
+int ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw,
u16 *refill, u16 *max, u8 *bwg_id,
u8 *prio_type, u8 *prio_tc)
{
@@ -368,6 +348,9 @@ s32 ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw,
break;
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ case ixgbe_mac_x550em_a:
ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max,
bwg_id, prio_type, prio_tc);
ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
@@ -389,7 +372,6 @@ static void ixgbe_dcb_read_rtrup2tc_82599(struct ixgbe_hw *hw, u8 *map)
for (i = 0; i < MAX_USER_PRIORITY; i++)
map[i] = IXGBE_RTRUP2TC_UP_MASK &
(reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT));
- return;
}
void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map)
@@ -397,6 +379,9 @@ void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map)
switch (hw->mac.type) {
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ case ixgbe_mac_x550em_a:
ixgbe_dcb_read_rtrup2tc_82599(hw, map);
break;
default:
generated by cgit (git 2.34.1) at 2025-12-25 17:12:31 +0000