1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2009 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 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
29 #include "ixgbe_type.h"
30 #include "ixgbe_dcb.h"
31 #include "ixgbe_dcb_82599.h"
34 * ixgbe_dcb_get_tc_stats_82599 - Returns status for each traffic class
35 * @hw: pointer to hardware structure
36 * @stats: pointer to statistics structure
37 * @tc_count: Number of elements in bwg_array.
39 * This function returns the status data for each of the Traffic Classes in use.
41 s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw,
42 struct ixgbe_hw_stats *stats,
47 if (tc_count > MAX_TRAFFIC_CLASS)
49 /* Statistics pertaining to each traffic class */
50 for (tc = 0; tc < tc_count; tc++) {
51 /* Transmitted Packets */
52 stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
53 /* Transmitted Bytes */
54 stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc));
55 /* Received Packets */
56 stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
58 stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc));
65 * ixgbe_dcb_get_pfc_stats_82599 - Return CBFC status data
66 * @hw: pointer to hardware structure
67 * @stats: pointer to statistics structure
68 * @tc_count: Number of elements in bwg_array.
70 * This function returns the CBFC status data for each of the Traffic Classes.
72 s32 ixgbe_dcb_get_pfc_stats_82599(struct ixgbe_hw *hw,
73 struct ixgbe_hw_stats *stats,
78 if (tc_count > MAX_TRAFFIC_CLASS)
80 for (tc = 0; tc < tc_count; tc++) {
81 /* Priority XOFF Transmitted */
82 stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc));
83 /* Priority XOFF Received */
84 stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(tc));
91 * ixgbe_dcb_config_packet_buffers_82599 - Configure DCB packet buffers
92 * @hw: pointer to hardware structure
93 * @dcb_config: pointer to ixgbe_dcb_config structure
95 * Configure packet buffers for DCB mode.
97 s32 ixgbe_dcb_config_packet_buffers_82599(struct ixgbe_hw *hw,
98 struct ixgbe_dcb_config *dcb_config)
101 u32 value = IXGBE_RXPBSIZE_64KB;
104 /* Setup Rx packet buffer sizes */
105 switch (dcb_config->rx_pba_cfg) {
107 /* Setup the first four at 80KB */
108 value = IXGBE_RXPBSIZE_80KB;
110 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
111 /* Setup the last four at 48KB...don't re-init i */
112 value = IXGBE_RXPBSIZE_48KB;
116 for (; i < IXGBE_MAX_PACKET_BUFFERS; i++)
117 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
119 /* Setup Tx packet buffer sizes */
120 for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) {
121 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i),
122 IXGBE_TXPBSIZE_20KB);
123 IXGBE_WRITE_REG(hw, IXGBE_TXPBTHRESH(i),
124 IXGBE_TXPBTHRESH_DCB);
133 * ixgbe_dcb_config_rx_arbiter_82599 - Config Rx Data arbiter
134 * @hw: pointer to hardware structure
135 * @dcb_config: pointer to ixgbe_dcb_config structure
137 * Configure Rx Packet Arbiter and credits for each traffic class.
139 s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw,
140 struct ixgbe_dcb_config *dcb_config)
142 struct tc_bw_alloc *p;
144 u32 credit_refill = 0;
148 /* Disable the arbiter before changing parameters */
149 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, IXGBE_RTRPCS_ARBDIS);
151 /* Map all traffic classes to their UP, 1 to 1 */
153 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
154 reg |= (i << (i * IXGBE_RTRUP2TC_UP_SHIFT));
155 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
157 /* Configure traffic class credits and priority */
158 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
159 p = &dcb_config->tc_config[i].path[DCB_RX_CONFIG];
161 credit_refill = p->data_credits_refill;
162 credit_max = p->data_credits_max;
163 reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT);
165 reg |= (u32)(p->bwg_id) << IXGBE_RTRPT4C_BWG_SHIFT;
167 if (p->prio_type == prio_link)
168 reg |= IXGBE_RTRPT4C_LSP;
170 IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg);
174 * Configure Rx packet plane (recycle mode; WSP) and
177 reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC;
178 IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg);
184 * ixgbe_dcb_config_tx_desc_arbiter_82599 - Config Tx Desc. arbiter
185 * @hw: pointer to hardware structure
186 * @dcb_config: pointer to ixgbe_dcb_config structure
188 * Configure Tx Descriptor Arbiter and credits for each traffic class.
190 s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw,
191 struct ixgbe_dcb_config *dcb_config)
193 struct tc_bw_alloc *p;
194 u32 reg, max_credits;
197 /* Disable the arbiter before changing parameters */
198 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, IXGBE_RTTDCS_ARBDIS);
200 /* Clear the per-Tx queue credits; we use per-TC instead */
201 for (i = 0; i < 128; i++) {
202 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, i);
203 IXGBE_WRITE_REG(hw, IXGBE_RTTDT1C, 0);
206 /* Configure traffic class credits and priority */
207 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
208 p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
209 max_credits = dcb_config->tc_config[i].desc_credits_max;
210 reg = max_credits << IXGBE_RTTDT2C_MCL_SHIFT;
211 reg |= p->data_credits_refill;
212 reg |= (u32)(p->bwg_id) << IXGBE_RTTDT2C_BWG_SHIFT;
214 if (p->prio_type == prio_group)
215 reg |= IXGBE_RTTDT2C_GSP;
217 if (p->prio_type == prio_link)
218 reg |= IXGBE_RTTDT2C_LSP;
220 IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg);
224 * Configure Tx descriptor plane (recycle mode; WSP) and
227 reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM;
228 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
234 * ixgbe_dcb_config_tx_data_arbiter_82599 - Config Tx Data arbiter
235 * @hw: pointer to hardware structure
236 * @dcb_config: pointer to ixgbe_dcb_config structure
238 * Configure Tx Packet Arbiter and credits for each traffic class.
240 s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw,
241 struct ixgbe_dcb_config *dcb_config)
243 struct tc_bw_alloc *p;
247 /* Disable the arbiter before changing parameters */
248 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, IXGBE_RTTPCS_ARBDIS);
250 /* Map all traffic classes to their UP, 1 to 1 */
252 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
253 reg |= (i << (i * IXGBE_RTTUP2TC_UP_SHIFT));
254 IXGBE_WRITE_REG(hw, IXGBE_RTTUP2TC, reg);
256 /* Configure traffic class credits and priority */
257 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
258 p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
259 reg = p->data_credits_refill;
260 reg |= (u32)(p->data_credits_max) << IXGBE_RTTPT2C_MCL_SHIFT;
261 reg |= (u32)(p->bwg_id) << IXGBE_RTTPT2C_BWG_SHIFT;
263 if (p->prio_type == prio_group)
264 reg |= IXGBE_RTTPT2C_GSP;
266 if (p->prio_type == prio_link)
267 reg |= IXGBE_RTTPT2C_LSP;
269 IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg);
273 * Configure Tx packet plane (recycle mode; SP; arb delay) and
276 reg = IXGBE_RTTPCS_TPPAC | IXGBE_RTTPCS_TPRM |
277 (IXGBE_RTTPCS_ARBD_DCB << IXGBE_RTTPCS_ARBD_SHIFT);
278 IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, reg);
284 * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
285 * @hw: pointer to hardware structure
286 * @dcb_config: pointer to ixgbe_dcb_config structure
288 * Configure Priority Flow Control (PFC) for each traffic class.
290 s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw,
291 struct ixgbe_dcb_config *dcb_config)
295 /* If PFC is disabled globally then fall back to LFC. */
296 if (!dcb_config->pfc_mode_enable) {
297 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
298 hw->mac.ops.setup_fc(hw, i);
302 /* PFC is mutually exclusive with link flow control */
303 hw->fc.current_mode = ixgbe_fc_none;
305 /* Configure PFC Tx thresholds per TC */
306 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
307 /* Config and remember Tx */
308 if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full ||
309 dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) {
310 reg = hw->fc.high_water | IXGBE_FCRTH_FCEN;
311 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
312 reg = hw->fc.low_water | IXGBE_FCRTL_XONE;
313 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg);
315 IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
316 IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
320 /* Configure pause time (2 TCs per register) */
321 reg = hw->fc.pause_time | (hw->fc.pause_time << 16);
322 for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
323 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);
325 /* Configure flow control refresh threshold value */
326 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);
328 /* Enable Transmit PFC */
329 reg = IXGBE_FCCFG_TFCE_PRIORITY;
330 IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg);
334 * We will always honor XOFF frames we receive when
335 * we are in PFC mode.
337 reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
338 reg &= ~IXGBE_MFLCN_RFCE;
339 reg |= IXGBE_MFLCN_RPFCE;
340 IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
346 * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics
347 * @hw: pointer to hardware structure
349 * Configure queue statistics registers, all queues belonging to same traffic
350 * class uses a single set of queue statistics counters.
352 s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw)
358 * Receive Queues stats setting
359 * 32 RQSMR registers, each configuring 4 queues.
360 * Set all 16 queues of each TC to the same stat
361 * with TC 'n' going to stat 'n'.
363 for (i = 0; i < 32; i++) {
364 reg = 0x01010101 * (i / 4);
365 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
368 * Transmit Queues stats setting
369 * 32 TQSM registers, each controlling 4 queues.
370 * Set all queues of each TC to the same stat
371 * with TC 'n' going to stat 'n'.
372 * Tx queues are allocated non-uniformly to TCs:
373 * 32, 32, 16, 16, 8, 8, 8, 8.
375 for (i = 0; i < 32; i++) {
392 IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg);
399 * ixgbe_dcb_config_82599 - Configure general DCB parameters
400 * @hw: pointer to hardware structure
401 * @dcb_config: pointer to ixgbe_dcb_config structure
403 * Configure general DCB parameters.
405 s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw)
410 /* Disable the Tx desc arbiter so that MTQC can be changed */
411 reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
412 reg |= IXGBE_RTTDCS_ARBDIS;
413 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
415 /* Enable DCB for Rx with 8 TCs */
416 reg = IXGBE_READ_REG(hw, IXGBE_MRQC);
417 switch (reg & IXGBE_MRQC_MRQE_MASK) {
419 case IXGBE_MRQC_RT4TCEN:
420 /* RSS disabled cases */
421 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
423 case IXGBE_MRQC_RSSEN:
424 case IXGBE_MRQC_RTRSS4TCEN:
425 /* RSS enabled cases */
426 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RTRSS8TCEN;
429 /* Unsupported value, assume stale data, overwrite no RSS */
430 reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN;
432 IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg);
434 /* Enable DCB for Tx with 8 TCs */
435 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
436 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
438 /* Disable drop for all queues */
439 for (q = 0; q < 128; q++)
440 IXGBE_WRITE_REG(hw, IXGBE_QDE, q << IXGBE_QDE_IDX_SHIFT);
442 /* Enable the Tx desc arbiter */
443 reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
444 reg &= ~IXGBE_RTTDCS_ARBDIS;
445 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg);
451 * ixgbe_dcb_hw_config_82599 - Configure and enable DCB
452 * @hw: pointer to hardware structure
453 * @dcb_config: pointer to ixgbe_dcb_config structure
455 * Configure dcb settings and enable dcb mode.
457 s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw,
458 struct ixgbe_dcb_config *dcb_config)
460 ixgbe_dcb_config_packet_buffers_82599(hw, dcb_config);
461 ixgbe_dcb_config_82599(hw);
462 ixgbe_dcb_config_rx_arbiter_82599(hw, dcb_config);
463 ixgbe_dcb_config_tx_desc_arbiter_82599(hw, dcb_config);
464 ixgbe_dcb_config_tx_data_arbiter_82599(hw, dcb_config);
465 ixgbe_dcb_config_pfc_82599(hw, dcb_config);
466 ixgbe_dcb_config_tc_stats_82599(hw);