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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include "ixgbe.h"
5#include "ixgbe_type.h"
6#include "ixgbe_dcb.h"
7#include "ixgbe_dcb_82599.h"
8
9/**
10 * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
11 * @hw: pointer to hardware structure
12 * @refill: refill credits index by traffic class
13 * @max: max credits index by traffic class
14 * @bwg_id: bandwidth grouping indexed by traffic class
15 * @prio_type: priority type indexed by traffic class
16 * @prio_tc: priority to tc assignments indexed by priority
17 *
18 * Configure Rx Packet Arbiter and credits for each traffic class.
19 */
20int ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
21 u16 *refill,
22 u16 *max,
23 u8 *bwg_id,
24 u8 *prio_type,
25 u8 *prio_tc)
26{
27 u32 reg = 0;
28 u32 credit_refill = 0;
29 u32 credit_max = 0;
30 u8 i = 0;
31
32 /*
33 * Disable the arbiter before changing parameters
34 * (always enable recycle mode; WSP)
35 */
36 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC | IXGBE_RTRPCS_ARBDIS;
37 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
38
39 /* Map all traffic classes to their UP */
40 reg = 0;
41 for (i = 0; i < MAX_USER_PRIORITY; i++)
42 reg |= (prio_tc[i] << (i * IXGBE_RTRUP2TC_UP_SHIFT));
43 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
44
45 /* Configure traffic class credits and priority */
46 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
47 credit_refill = refill[i];
48 credit_max = max[i];
49 reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
50
51 reg |= (u32)(bwg_id[i]) << IXGBE_RTRPT4C_BWG_SHIFT;
52
53 if (prio_type[i] == prio_link)
54 reg |= IXGBE_RTRPT4C_LSP;
55
56 IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
57 }
58
59 /*
60 * Configure Rx packet plane (recycle mode; WSP) and
61 * enable arbiter
62 */
63 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
64 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
65
66 return 0;
67}
68
69/**
70 * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
71 * @hw: pointer to hardware structure
72 * @refill: refill credits index by traffic class
73 * @max: max credits index by traffic class
74 * @bwg_id: bandwidth grouping indexed by traffic class
75 * @prio_type: priority type indexed by traffic class
76 *
77 * Configure Tx Descriptor Arbiter and credits for each traffic class.
78 */
79int ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
80 u16 *refill,
81 u16 *max,
82 u8 *bwg_id,
83 u8 *prio_type)
84{
85 u32 reg, max_credits;
86 u8 i;
87
88 /* Clear the per-Tx queue credits; we use per-TC instead */
89 for (i = 0; i < 128; i++) {
90 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
91 IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
92 }
93
94 /* Configure traffic class credits and priority */
95 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
96 max_credits = max[i];
97 reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
98 reg |= refill[i];
99 reg |= (u32)(bwg_id[i]) << IXGBE_RTTDT2C_BWG_SHIFT;
100
101 if (prio_type[i] == prio_group)
102 reg |= IXGBE_RTTDT2C_GSP;
103
104 if (prio_type[i] == prio_link)
105 reg |= IXGBE_RTTDT2C_LSP;
106
107 IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
108 }
109
110 /*
111 * Configure Tx descriptor plane (recycle mode; WSP) and
112 * enable arbiter
113 */
114 reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
115 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
116
117 return 0;
118}
119
120/**
121 * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
122 * @hw: pointer to hardware structure
123 * @refill: refill credits index by traffic class
124 * @max: max credits index by traffic class
125 * @bwg_id: bandwidth grouping indexed by traffic class
126 * @prio_type: priority type indexed by traffic class
127 * @prio_tc: priority to tc assignments indexed by priority
128 *
129 * Configure Tx Packet Arbiter and credits for each traffic class.
130 */
131int ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
132 u16 *refill,
133 u16 *max,
134 u8 *bwg_id,
135 u8 *prio_type,
136 u8 *prio_tc)
137{
138 u32 reg;
139 u8 i;
140
141 /*
142 * Disable the arbiter before changing parameters
143 * (always enable recycle mode; SP; arb delay)
144 */
145 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
146 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT) |
147 IXGBE_RTTPCS_ARBDIS;
148 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
149
150 /* Map all traffic classes to their UP */
151 reg = 0;
152 for (i = 0; i < MAX_USER_PRIORITY; i++)
153 reg |= (prio_tc[i] << (i * IXGBE_RTTUP2TC_UP_SHIFT));
154 IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
155
156 /* Configure traffic class credits and priority */
157 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
158 reg = refill[i];
159 reg |= (u32)(max[i]) << IXGBE_RTTPT2C_MCL_SHIFT;
160 reg |= (u32)(bwg_id[i]) << IXGBE_RTTPT2C_BWG_SHIFT;
161
162 if (prio_type[i] == prio_group)
163 reg |= IXGBE_RTTPT2C_GSP;
164
165 if (prio_type[i] == prio_link)
166 reg |= IXGBE_RTTPT2C_LSP;
167
168 IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
169 }
170
171 /*
172 * Configure Tx packet plane (recycle mode; SP; arb delay) and
173 * enable arbiter
174 */
175 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
176 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
177 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
178
179 return 0;
180}
181
182/**
183 * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
184 * @hw: pointer to hardware structure
185 * @pfc_en: enabled pfc bitmask
186 * @prio_tc: priority to tc assignments indexed by priority
187 *
188 * Configure Priority Flow Control (PFC) for each traffic class.
189 */
190int ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
191{
192 u32 i, j, fcrtl, reg;
193 u8 max_tc = 0;
194
195 /* Enable Transmit Priority Flow Control */
196 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, IXGBE_FCCFG_TFCE_PRIORITY);
197
198 /* Enable Receive Priority Flow Control */
199 reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
200 reg |= IXGBE_MFLCN_DPF;
201
202 /*
203 * X540 & X550 supports per TC Rx priority flow control.
204 * So clear all TCs and only enable those that should be
205 * enabled.
206 */
207 reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
208
209 if (hw->mac.type >= ixgbe_mac_X540)
210 reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
211
212 if (pfc_en)
213 reg |= IXGBE_MFLCN_RPFCE;
214
215 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
216
217 for (i = 0; i < MAX_USER_PRIORITY; i++) {
218 if (prio_tc[i] > max_tc)
219 max_tc = prio_tc[i];
220 }
221
222
223 /* Configure PFC Tx thresholds per TC */
224 for (i = 0; i <= max_tc; i++) {
225 int enabled = 0;
226
227 for (j = 0; j < MAX_USER_PRIORITY; j++) {
228 if ((prio_tc[j] == i) && (pfc_en & BIT(j))) {
229 enabled = 1;
230 break;
231 }
232 }
233
234 if (enabled) {
235 reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
236 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
237 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
238 } else {
239 /* In order to prevent Tx hangs when the internal Tx
240 * switch is enabled we must set the high water mark
241 * to the Rx packet buffer size - 24KB. This allows
242 * the Tx switch to function even under heavy Rx
243 * workloads.
244 */
245 reg = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
246 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
247 }
248
249 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
250 }
251
252 for (; i < MAX_TRAFFIC_CLASS; i++) {
253 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
254 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
255 }
256
257 /* Configure pause time (2 TCs per register) */
258 reg = hw->fc.pause_time * 0x00010001;
259 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
260 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
261
262 /* Configure flow control refresh threshold value */
263 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
264
265 return 0;
266}
267
268/**
269 * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
270 * @hw: pointer to hardware structure
271 *
272 * Configure queue statistics registers, all queues belonging to same traffic
273 * class uses a single set of queue statistics counters.
274 */
275static int ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
276{
277 u32 reg = 0;
278 u8 i = 0;
279
280 /*
281 * Receive Queues stats setting
282 * 32 RQSMR registers, each configuring 4 queues.
283 * Set all 16 queues of each TC to the same stat
284 * with TC 'n' going to stat 'n'.
285 */
286 for (i = 0; i < 32; i++) {
287 reg = 0x01010101 * (i / 4);
288 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
289 }
290 /*
291 * Transmit Queues stats setting
292 * 32 TQSM registers, each controlling 4 queues.
293 * Set all queues of each TC to the same stat
294 * with TC 'n' going to stat 'n'.
295 * Tx queues are allocated non-uniformly to TCs:
296 * 32, 32, 16, 16, 8, 8, 8, 8.
297 */
298 for (i = 0; i < 32; i++) {
299 if (i < 8)
300 reg = 0x00000000;
301 else if (i < 16)
302 reg = 0x01010101;
303 else if (i < 20)
304 reg = 0x02020202;
305 else if (i < 24)
306 reg = 0x03030303;
307 else if (i < 26)
308 reg = 0x04040404;
309 else if (i < 28)
310 reg = 0x05050505;
311 else if (i < 30)
312 reg = 0x06060606;
313 else
314 reg = 0x07070707;
315 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
316 }
317
318 return 0;
319}
320
321/**
322 * ixgbe_dcb_hw_config_82599 - Configure and enable DCB
323 * @hw: pointer to hardware structure
324 * @pfc_en: enabled pfc bitmask
325 * @refill: refill credits index by traffic class
326 * @max: max credits index by traffic class
327 * @bwg_id: bandwidth grouping indexed by traffic class
328 * @prio_type: priority type indexed by traffic class
329 * @prio_tc: priority to tc assignments indexed by priority
330 *
331 * Configure dcb settings and enable dcb mode.
332 */
333int ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, u8 pfc_en, u16 *refill,
334 u16 *max, u8 *bwg_id, u8 *prio_type, u8 *prio_tc)
335{
336 ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max, bwg_id,
337 prio_type, prio_tc);
338 ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
339 bwg_id, prio_type);
340 ixgbe_dcb_config_tx_data_arbiter_82599(hw, refill, max,
341 bwg_id, prio_type, prio_tc);
342 ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
343 ixgbe_dcb_config_tc_stats_82599(hw);
344
345 return 0;
346}
347
1/*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2013 Intel Corporation.
5
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.
9
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
13 more details.
14
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.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
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
26
27*******************************************************************************/
28
29#include "ixgbe.h"
30#include "ixgbe_type.h"
31#include "ixgbe_dcb.h"
32#include "ixgbe_dcb_82599.h"
33
34/**
35 * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
36 * @hw: pointer to hardware structure
37 * @refill: refill credits index by traffic class
38 * @max: max credits index by traffic class
39 * @bwg_id: bandwidth grouping indexed by traffic class
40 * @prio_type: priority type indexed by traffic class
41 *
42 * Configure Rx Packet Arbiter and credits for each traffic class.
43 */
44s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
45 u16 *refill,
46 u16 *max,
47 u8 *bwg_id,
48 u8 *prio_type,
49 u8 *prio_tc)
50{
51 u32 reg = 0;
52 u32 credit_refill = 0;
53 u32 credit_max = 0;
54 u8 i = 0;
55
56 /*
57 * Disable the arbiter before changing parameters
58 * (always enable recycle mode; WSP)
59 */
60 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC | IXGBE_RTRPCS_ARBDIS;
61 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
62
63 /* Map all traffic classes to their UP */
64 reg = 0;
65 for (i = 0; i < MAX_USER_PRIORITY; i++)
66 reg |= (prio_tc[i] << (i * IXGBE_RTRUP2TC_UP_SHIFT));
67 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
68
69 /* Configure traffic class credits and priority */
70 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
71 credit_refill = refill[i];
72 credit_max = max[i];
73 reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
74
75 reg |= (u32)(bwg_id[i]) << IXGBE_RTRPT4C_BWG_SHIFT;
76
77 if (prio_type[i] == prio_link)
78 reg |= IXGBE_RTRPT4C_LSP;
79
80 IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
81 }
82
83 /*
84 * Configure Rx packet plane (recycle mode; WSP) and
85 * enable arbiter
86 */
87 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
88 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
89
90 return 0;
91}
92
93/**
94 * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
95 * @hw: pointer to hardware structure
96 * @refill: refill credits index by traffic class
97 * @max: max credits index by traffic class
98 * @bwg_id: bandwidth grouping indexed by traffic class
99 * @prio_type: priority type indexed by traffic class
100 *
101 * Configure Tx Descriptor Arbiter and credits for each traffic class.
102 */
103s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
104 u16 *refill,
105 u16 *max,
106 u8 *bwg_id,
107 u8 *prio_type)
108{
109 u32 reg, max_credits;
110 u8 i;
111
112 /* Clear the per-Tx queue credits; we use per-TC instead */
113 for (i = 0; i < 128; i++) {
114 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
115 IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
116 }
117
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_RTTDT2C_MCL_SHIFT;
122 reg |= refill[i];
123 reg |= (u32)(bwg_id[i]) << IXGBE_RTTDT2C_BWG_SHIFT;
124
125 if (prio_type[i] == prio_group)
126 reg |= IXGBE_RTTDT2C_GSP;
127
128 if (prio_type[i] == prio_link)
129 reg |= IXGBE_RTTDT2C_LSP;
130
131 IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
132 }
133
134 /*
135 * Configure Tx descriptor plane (recycle mode; WSP) and
136 * enable arbiter
137 */
138 reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
139 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
140
141 return 0;
142}
143
144/**
145 * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
146 * @hw: pointer to hardware structure
147 * @refill: refill credits index by traffic class
148 * @max: max credits index by traffic class
149 * @bwg_id: bandwidth grouping indexed by traffic class
150 * @prio_type: priority type indexed by traffic class
151 *
152 * Configure Tx Packet Arbiter and credits for each traffic class.
153 */
154s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
155 u16 *refill,
156 u16 *max,
157 u8 *bwg_id,
158 u8 *prio_type,
159 u8 *prio_tc)
160{
161 u32 reg;
162 u8 i;
163
164 /*
165 * Disable the arbiter before changing parameters
166 * (always enable recycle mode; SP; arb delay)
167 */
168 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
169 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT) |
170 IXGBE_RTTPCS_ARBDIS;
171 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
172
173 /* Map all traffic classes to their UP */
174 reg = 0;
175 for (i = 0; i < MAX_USER_PRIORITY; i++)
176 reg |= (prio_tc[i] << (i * IXGBE_RTTUP2TC_UP_SHIFT));
177 IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
178
179 /* Configure traffic class credits and priority */
180 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
181 reg = refill[i];
182 reg |= (u32)(max[i]) << IXGBE_RTTPT2C_MCL_SHIFT;
183 reg |= (u32)(bwg_id[i]) << IXGBE_RTTPT2C_BWG_SHIFT;
184
185 if (prio_type[i] == prio_group)
186 reg |= IXGBE_RTTPT2C_GSP;
187
188 if (prio_type[i] == prio_link)
189 reg |= IXGBE_RTTPT2C_LSP;
190
191 IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
192 }
193
194 /*
195 * Configure Tx packet plane (recycle mode; SP; arb delay) and
196 * enable arbiter
197 */
198 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
199 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
200 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
201
202 return 0;
203}
204
205/**
206 * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
207 * @hw: pointer to hardware structure
208 * @pfc_en: enabled pfc bitmask
209 * @prio_tc: priority to tc assignments indexed by priority
210 *
211 * Configure Priority Flow Control (PFC) for each traffic class.
212 */
213s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
214{
215 u32 i, j, fcrtl, reg;
216 u8 max_tc = 0;
217
218 /* Enable Transmit Priority Flow Control */
219 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, IXGBE_FCCFG_TFCE_PRIORITY);
220
221 /* Enable Receive Priority Flow Control */
222 reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
223 reg |= IXGBE_MFLCN_DPF;
224
225 /*
226 * X540 & X550 supports per TC Rx priority flow control.
227 * So clear all TCs and only enable those that should be
228 * enabled.
229 */
230 reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
231
232 if (hw->mac.type >= ixgbe_mac_X540)
233 reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
234
235 if (pfc_en)
236 reg |= IXGBE_MFLCN_RPFCE;
237
238 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
239
240 for (i = 0; i < MAX_USER_PRIORITY; i++) {
241 if (prio_tc[i] > max_tc)
242 max_tc = prio_tc[i];
243 }
244
245
246 /* Configure PFC Tx thresholds per TC */
247 for (i = 0; i <= max_tc; i++) {
248 int enabled = 0;
249
250 for (j = 0; j < MAX_USER_PRIORITY; j++) {
251 if ((prio_tc[j] == i) && (pfc_en & (1 << j))) {
252 enabled = 1;
253 break;
254 }
255 }
256
257 if (enabled) {
258 reg = (hw->fc.high_water[i] << 10) | IXGBE_FCRTH_FCEN;
259 fcrtl = (hw->fc.low_water[i] << 10) | IXGBE_FCRTL_XONE;
260 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), fcrtl);
261 } else {
262 /* In order to prevent Tx hangs when the internal Tx
263 * switch is enabled we must set the high water mark
264 * to the Rx packet buffer size - 24KB. This allows
265 * the Tx switch to function even under heavy Rx
266 * workloads.
267 */
268 reg = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(i)) - 24576;
269 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
270 }
271
272 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
273 }
274
275 for (; i < MAX_TRAFFIC_CLASS; i++) {
276 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
277 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
278 }
279
280 /* Configure pause time (2 TCs per register) */
281 reg = hw->fc.pause_time * 0x00010001;
282 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
283 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
284
285 /* Configure flow control refresh threshold value */
286 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
287
288 return 0;
289}
290
291/**
292 * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
293 * @hw: pointer to hardware structure
294 *
295 * Configure queue statistics registers, all queues belonging to same traffic
296 * class uses a single set of queue statistics counters.
297 */
298static s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
299{
300 u32 reg = 0;
301 u8 i = 0;
302
303 /*
304 * Receive Queues stats setting
305 * 32 RQSMR registers, each configuring 4 queues.
306 * Set all 16 queues of each TC to the same stat
307 * with TC 'n' going to stat 'n'.
308 */
309 for (i = 0; i < 32; i++) {
310 reg = 0x01010101 * (i / 4);
311 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
312 }
313 /*
314 * Transmit Queues stats setting
315 * 32 TQSM registers, each controlling 4 queues.
316 * Set all queues of each TC to the same stat
317 * with TC 'n' going to stat 'n'.
318 * Tx queues are allocated non-uniformly to TCs:
319 * 32, 32, 16, 16, 8, 8, 8, 8.
320 */
321 for (i = 0; i < 32; i++) {
322 if (i < 8)
323 reg = 0x00000000;
324 else if (i < 16)
325 reg = 0x01010101;
326 else if (i < 20)
327 reg = 0x02020202;
328 else if (i < 24)
329 reg = 0x03030303;
330 else if (i < 26)
331 reg = 0x04040404;
332 else if (i < 28)
333 reg = 0x05050505;
334 else if (i < 30)
335 reg = 0x06060606;
336 else
337 reg = 0x07070707;
338 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
339 }
340
341 return 0;
342}
343
344/**
345 * ixgbe_dcb_hw_config_82599 - Configure and enable DCB
346 * @hw: pointer to hardware structure
347 * @refill: refill credits index by traffic class
348 * @max: max credits index by traffic class
349 * @bwg_id: bandwidth grouping indexed by traffic class
350 * @prio_type: priority type indexed by traffic class
351 * @pfc_en: enabled pfc bitmask
352 *
353 * Configure dcb settings and enable dcb mode.
354 */
355s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, u8 pfc_en, u16 *refill,
356 u16 *max, u8 *bwg_id, u8 *prio_type, u8 *prio_tc)
357{
358 ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max, bwg_id,
359 prio_type, prio_tc);
360 ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
361 bwg_id, prio_type);
362 ixgbe_dcb_config_tx_data_arbiter_82599(hw, refill, max,
363 bwg_id, prio_type, prio_tc);
364 ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
365 ixgbe_dcb_config_tc_stats_82599(hw);
366
367 return 0;
368}
369