1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2013 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include "ixgbe_type.h"
31 #include "ixgbe_dcb.h"
32 #include "ixgbe_dcb_82598.h"
35 * ixgbe_dcb_config_rx_arbiter_82598 - Config Rx data arbiter
36 * @hw: pointer to hardware structure
37 * @dcb_config: pointer to ixgbe_dcb_config structure
39 * Configure Rx Data Arbiter and credits for each traffic class.
41 s32 ixgbe_dcb_config_rx_arbiter_82598(struct ixgbe_hw *hw,
47 u32 credit_refill = 0;
51 reg = IXGBE_READ_REG(hw, IXGBE_RUPPBMR) | IXGBE_RUPPBMR_MQA;
52 IXGBE_WRITE_REG(hw, IXGBE_RUPPBMR, reg);
54 reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
56 reg &= ~IXGBE_RMCS_ARBDIS;
57 /* Enable Receive Recycle within the BWG */
58 reg |= IXGBE_RMCS_RRM;
59 /* Enable Deficit Fixed Priority arbitration*/
60 reg |= IXGBE_RMCS_DFP;
62 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);
64 /* Configure traffic class credits and priority */
65 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
66 credit_refill = refill[i];
69 reg = credit_refill | (credit_max << IXGBE_RT2CR_MCL_SHIFT);
71 if (prio_type[i] == prio_link)
72 reg |= IXGBE_RT2CR_LSP;
74 IXGBE_WRITE_REG(hw, IXGBE_RT2CR(i), reg);
77 reg = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
78 reg |= IXGBE_RDRXCTL_RDMTS_1_2;
79 reg |= IXGBE_RDRXCTL_MPBEN;
80 reg |= IXGBE_RDRXCTL_MCEN;
81 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, reg);
83 reg = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
84 /* Make sure there is enough descriptors before arbitration */
85 reg &= ~IXGBE_RXCTRL_DMBYPS;
86 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg);
92 * ixgbe_dcb_config_tx_desc_arbiter_82598 - Config Tx Desc. arbiter
93 * @hw: pointer to hardware structure
94 * @dcb_config: pointer to ixgbe_dcb_config structure
96 * Configure Tx Descriptor Arbiter and credits for each traffic class.
98 s32 ixgbe_dcb_config_tx_desc_arbiter_82598(struct ixgbe_hw *hw,
104 u32 reg, max_credits;
107 reg = IXGBE_READ_REG(hw, IXGBE_DPMCS);
110 reg &= ~IXGBE_DPMCS_ARBDIS;
111 reg |= IXGBE_DPMCS_TSOEF;
113 /* Configure Max TSO packet size 34KB including payload and headers */
114 reg |= (0x4 << IXGBE_DPMCS_MTSOS_SHIFT);
116 IXGBE_WRITE_REG(hw, IXGBE_DPMCS, reg);
118 /* Configure traffic class credits and priority */
119 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
120 max_credits = max[i];
121 reg = max_credits << IXGBE_TDTQ2TCCR_MCL_SHIFT;
123 reg |= (u32)(bwg_id[i]) << IXGBE_TDTQ2TCCR_BWG_SHIFT;
125 if (prio_type[i] == prio_group)
126 reg |= IXGBE_TDTQ2TCCR_GSP;
128 if (prio_type[i] == prio_link)
129 reg |= IXGBE_TDTQ2TCCR_LSP;
131 IXGBE_WRITE_REG(hw, IXGBE_TDTQ2TCCR(i), reg);
138 * ixgbe_dcb_config_tx_data_arbiter_82598 - Config Tx data arbiter
139 * @hw: pointer to hardware structure
140 * @dcb_config: pointer to ixgbe_dcb_config structure
142 * Configure Tx Data Arbiter and credits for each traffic class.
144 s32 ixgbe_dcb_config_tx_data_arbiter_82598(struct ixgbe_hw *hw,
153 reg = IXGBE_READ_REG(hw, IXGBE_PDPMCS);
154 /* Enable Data Plane Arbiter */
155 reg &= ~IXGBE_PDPMCS_ARBDIS;
156 /* Enable DFP and Transmit Recycle Mode */
157 reg |= (IXGBE_PDPMCS_TPPAC | IXGBE_PDPMCS_TRM);
159 IXGBE_WRITE_REG(hw, IXGBE_PDPMCS, reg);
161 /* Configure traffic class credits and priority */
162 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
164 reg |= (u32)(max[i]) << IXGBE_TDPT2TCCR_MCL_SHIFT;
165 reg |= (u32)(bwg_id[i]) << IXGBE_TDPT2TCCR_BWG_SHIFT;
167 if (prio_type[i] == prio_group)
168 reg |= IXGBE_TDPT2TCCR_GSP;
170 if (prio_type[i] == prio_link)
171 reg |= IXGBE_TDPT2TCCR_LSP;
173 IXGBE_WRITE_REG(hw, IXGBE_TDPT2TCCR(i), reg);
176 /* Enable Tx packet buffer division */
177 reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL);
178 reg |= IXGBE_DTXCTL_ENDBUBD;
179 IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg);
185 * ixgbe_dcb_config_pfc_82598 - Config priority flow control
186 * @hw: pointer to hardware structure
187 * @dcb_config: pointer to ixgbe_dcb_config structure
189 * Configure Priority Flow Control for each traffic class.
191 s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw, u8 pfc_en)
196 /* Enable Transmit Priority Flow Control */
197 reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
198 reg &= ~IXGBE_RMCS_TFCE_802_3X;
199 reg |= IXGBE_RMCS_TFCE_PRIORITY;
200 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);
202 /* Enable Receive Priority Flow Control */
203 reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);
204 reg &= ~(IXGBE_FCTRL_RPFCE | IXGBE_FCTRL_RFCE);
207 reg |= IXGBE_FCTRL_RPFCE;
209 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg);
211 /* Configure PFC Tx thresholds per TC */
212 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
213 if (!(pfc_en & BIT(i))) {
214 IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), 0);
215 IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), 0);
219 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
220 reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
221 IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), fcrtl);
222 IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), reg);
225 /* Configure pause time */
226 reg = hw->fc.pause_time * 0x00010001;
227 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
228 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
230 /* Configure flow control refresh threshold value */
231 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
238 * ixgbe_dcb_config_tc_stats_82598 - Configure traffic class statistics
239 * @hw: pointer to hardware structure
241 * Configure queue statistics registers, all queues belonging to same traffic
242 * class uses a single set of queue statistics counters.
244 static s32 ixgbe_dcb_config_tc_stats_82598(struct ixgbe_hw *hw)
250 /* Receive Queues stats setting - 8 queues per statistics reg */
251 for (i = 0, j = 0; i < 15 && j < 8; i = i + 2, j++) {
252 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i));
253 reg |= ((0x1010101) * j);
254 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
255 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i + 1));
256 reg |= ((0x1010101) * j);
257 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i + 1), reg);
259 /* Transmit Queues stats setting - 4 queues per statistics reg */
260 for (i = 0; i < 8; i++) {
261 reg = IXGBE_READ_REG(hw, IXGBE_TQSMR(i));
262 reg |= ((0x1010101) * i);
263 IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i), reg);
270 * ixgbe_dcb_hw_config_82598 - Config and enable DCB
271 * @hw: pointer to hardware structure
272 * @dcb_config: pointer to ixgbe_dcb_config structure
274 * Configure dcb settings and enable dcb mode.
276 s32 ixgbe_dcb_hw_config_82598(struct ixgbe_hw *hw, u8 pfc_en, u16 *refill,
277 u16 *max, u8 *bwg_id, u8 *prio_type)
279 ixgbe_dcb_config_rx_arbiter_82598(hw, refill, max, prio_type);
280 ixgbe_dcb_config_tx_desc_arbiter_82598(hw, refill, max,
282 ixgbe_dcb_config_tx_data_arbiter_82598(hw, refill, max,
284 ixgbe_dcb_config_pfc_82598(hw, pfc_en);
285 ixgbe_dcb_config_tc_stats_82598(hw);