diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_dcb.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_dcb.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/drivers/net/ixgbe/ixgbe_dcb.c b/drivers/net/ixgbe/ixgbe_dcb.c deleted file mode 100644 index d16c260c1f5..00000000000 --- a/drivers/net/ixgbe/ixgbe_dcb.c +++ /dev/null @@ -1,168 +0,0 @@ -/******************************************************************************* - - Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2010 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 - -*******************************************************************************/ - - -#include "ixgbe.h" -#include "ixgbe_type.h" -#include "ixgbe_dcb.h" -#include "ixgbe_dcb_82598.h" -#include "ixgbe_dcb_82599.h" - -/** - * ixgbe_dcb_calculate_tc_credits - Calculates traffic class credits - * @ixgbe_dcb_config: Struct containing DCB settings. - * @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, - struct ixgbe_dcb_config *dcb_config, - int max_frame, u8 direction) -{ - struct tc_bw_alloc *p; - 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; - u16 link_percentage = 0; - u8 bw_percent = 0; - u8 i; - - if (dcb_config == NULL) { - ret_val = DCB_ERR_CONFIG; - goto out; - } - - min_credit = ((max_frame / 2) + DCB_CREDIT_QUANTUM - 1) / - DCB_CREDIT_QUANTUM; - - /* Find smallest link percentage */ - for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { - p = &dcb_config->tc_config[i].path[direction]; - bw_percent = dcb_config->bw_percentage[direction][p->bwg_id]; - link_percentage = p->bwg_percent; - - link_percentage = (link_percentage * bw_percent) / 100; - - if (link_percentage && link_percentage < min_percent) - min_percent = link_percentage; - } - - /* - * The ratio between traffic classes will control the bandwidth - * percentages seen on the wire. To calculate this ratio we use - * a multiplier. It is required that the refill credits must be - * larger than the max frame size so here we find the smallest - * multiplier that will allow all bandwidth percentages to be - * greater than the max frame size. - */ - min_multiplier = (min_credit / min_percent) + 1; - - /* Find out the link percentage for each TC first */ - for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { - p = &dcb_config->tc_config[i].path[direction]; - bw_percent = dcb_config->bw_percentage[direction][p->bwg_id]; - - link_percentage = p->bwg_percent; - /* Must be careful of integer division for very small nums */ - link_percentage = (link_percentage * bw_percent) / 100; - if (p->bwg_percent > 0 && link_percentage == 0) - link_percentage = 1; - - /* Save link_percentage for reference */ - p->link_percent = (u8)link_percentage; - - /* Calculate credit refill ratio using multiplier */ - credit_refill = min(link_percentage * min_multiplier, - MAX_CREDIT_REFILL); - p->data_credits_refill = (u16)credit_refill; - - /* Calculate maximum credit for the TC */ - credit_max = (link_percentage * MAX_CREDIT) / 100; - - /* - * Adjustment based on rule checking, if the percentage - * 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)) - credit_max = min_credit; - - if (direction == DCB_TX_CONFIG) { - /* - * Adjustment based on rule checking, if the - * percentage of a TC is too small, the maximum - * credit may not be enough to send out a TSO - * packet in descriptor plane arbitration. - */ - if ((hw->mac.type == ixgbe_mac_82598EB) && - credit_max && - (credit_max < MINIMUM_CREDIT_FOR_TSO)) - credit_max = MINIMUM_CREDIT_FOR_TSO; - - dcb_config->tc_config[i].desc_credits_max = - (u16)credit_max; - } - - p->data_credits_max = (u16)credit_max; - } - -out: - return ret_val; -} - -/** - * ixgbe_dcb_hw_config - Config and enable DCB - * @hw: pointer to hardware structure - * @dcb_config: pointer to ixgbe_dcb_config structure - * - * Configure dcb settings and enable dcb mode. - */ -s32 ixgbe_dcb_hw_config(struct ixgbe_hw *hw, - struct ixgbe_dcb_config *dcb_config) -{ - s32 ret = 0; - switch (hw->mac.type) { - case ixgbe_mac_82598EB: - ret = ixgbe_dcb_hw_config_82598(hw, dcb_config); - break; - case ixgbe_mac_82599EB: - case ixgbe_mac_X540: - ret = ixgbe_dcb_hw_config_82599(hw, dcb_config); - break; - default: - break; - } - return ret; -} - |