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 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_get_tc_stats_82598 - Return status data for each traffic class
36 * @hw: pointer to hardware structure
37 * @stats: pointer to statistics structure
38 * @tc_count: Number of elements in bwg_array.
40 * This function returns the status data for each of the Traffic Classes in use.
42 s32 ixgbe_dcb_get_tc_stats_82598(struct ixgbe_hw *hw,
43 struct ixgbe_hw_stats *stats,
48 if (tc_count > MAX_TRAFFIC_CLASS)
51 /* Statistics pertaining to each traffic class */
52 for (tc = 0; tc < tc_count; tc++) {
53 /* Transmitted Packets */
54 stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
55 /* Transmitted Bytes */
56 stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc));
57 /* Received Packets */
58 stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
60 stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc));
67 * ixgbe_dcb_get_pfc_stats_82598 - Returns CBFC status data
68 * @hw: pointer to hardware structure
69 * @stats: pointer to statistics structure
70 * @tc_count: Number of elements in bwg_array.
72 * This function returns the CBFC status data for each of the Traffic Classes.
74 s32 ixgbe_dcb_get_pfc_stats_82598(struct ixgbe_hw *hw,
75 struct ixgbe_hw_stats *stats,
80 if (tc_count > MAX_TRAFFIC_CLASS)
83 for (tc = 0; tc < tc_count; tc++) {
84 /* Priority XOFF Transmitted */
85 stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc));
86 /* Priority XOFF Received */
87 stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(tc));
94 * ixgbe_dcb_config_packet_buffers_82598 - Configure packet buffers
95 * @hw: pointer to hardware structure
96 * @dcb_config: pointer to ixgbe_dcb_config structure
98 * Configure packet buffers for DCB mode.
100 static s32 ixgbe_dcb_config_packet_buffers_82598(struct ixgbe_hw *hw,
101 struct ixgbe_dcb_config *dcb_config)
104 u32 value = IXGBE_RXPBSIZE_64KB;
107 /* Setup Rx packet buffer sizes */
108 switch (dcb_config->rx_pba_cfg) {
110 /* Setup the first four at 80KB */
111 value = IXGBE_RXPBSIZE_80KB;
113 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
114 /* Setup the last four at 48KB...don't re-init i */
115 value = IXGBE_RXPBSIZE_48KB;
119 for (; i < IXGBE_MAX_PACKET_BUFFERS; i++)
120 IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
122 /* Setup Tx packet buffer sizes */
123 for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) {
124 IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i),
125 IXGBE_TXPBSIZE_40KB);
134 * ixgbe_dcb_config_rx_arbiter_82598 - Config Rx data arbiter
135 * @hw: pointer to hardware structure
136 * @dcb_config: pointer to ixgbe_dcb_config structure
138 * Configure Rx Data Arbiter and credits for each traffic class.
140 s32 ixgbe_dcb_config_rx_arbiter_82598(struct ixgbe_hw *hw,
141 struct ixgbe_dcb_config *dcb_config)
143 struct tc_bw_alloc *p;
145 u32 credit_refill = 0;
149 reg = IXGBE_READ_REG(hw, IXGBE_RUPPBMR) | IXGBE_RUPPBMR_MQA;
150 IXGBE_WRITE_REG(hw, IXGBE_RUPPBMR, reg);
152 reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
154 reg &= ~IXGBE_RMCS_ARBDIS;
155 /* Enable Receive Recycle within the BWG */
156 reg |= IXGBE_RMCS_RRM;
157 /* Enable Deficit Fixed Priority arbitration*/
158 reg |= IXGBE_RMCS_DFP;
160 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);
162 /* Configure traffic class credits and priority */
163 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
164 p = &dcb_config->tc_config[i].path[DCB_RX_CONFIG];
165 credit_refill = p->data_credits_refill;
166 credit_max = p->data_credits_max;
168 reg = credit_refill | (credit_max << IXGBE_RT2CR_MCL_SHIFT);
170 if (p->prio_type == prio_link)
171 reg |= IXGBE_RT2CR_LSP;
173 IXGBE_WRITE_REG(hw, IXGBE_RT2CR(i), reg);
176 reg = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
177 reg |= IXGBE_RDRXCTL_RDMTS_1_2;
178 reg |= IXGBE_RDRXCTL_MPBEN;
179 reg |= IXGBE_RDRXCTL_MCEN;
180 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, reg);
182 reg = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
183 /* Make sure there is enough descriptors before arbitration */
184 reg &= ~IXGBE_RXCTRL_DMBYPS;
185 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg);
191 * ixgbe_dcb_config_tx_desc_arbiter_82598 - Config Tx Desc. arbiter
192 * @hw: pointer to hardware structure
193 * @dcb_config: pointer to ixgbe_dcb_config structure
195 * Configure Tx Descriptor Arbiter and credits for each traffic class.
197 s32 ixgbe_dcb_config_tx_desc_arbiter_82598(struct ixgbe_hw *hw,
198 struct ixgbe_dcb_config *dcb_config)
200 struct tc_bw_alloc *p;
201 u32 reg, max_credits;
204 reg = IXGBE_READ_REG(hw, IXGBE_DPMCS);
207 reg &= ~IXGBE_DPMCS_ARBDIS;
208 if (!(dcb_config->round_robin_enable)) {
209 /* Enable DFP and Recycle mode */
210 reg |= (IXGBE_DPMCS_TDPAC | IXGBE_DPMCS_TRM);
212 reg |= IXGBE_DPMCS_TSOEF;
213 /* Configure Max TSO packet size 34KB including payload and headers */
214 reg |= (0x4 << IXGBE_DPMCS_MTSOS_SHIFT);
216 IXGBE_WRITE_REG(hw, IXGBE_DPMCS, reg);
218 /* Configure traffic class credits and priority */
219 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
220 p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
221 max_credits = dcb_config->tc_config[i].desc_credits_max;
222 reg = max_credits << IXGBE_TDTQ2TCCR_MCL_SHIFT;
223 reg |= p->data_credits_refill;
224 reg |= (u32)(p->bwg_id) << IXGBE_TDTQ2TCCR_BWG_SHIFT;
226 if (p->prio_type == prio_group)
227 reg |= IXGBE_TDTQ2TCCR_GSP;
229 if (p->prio_type == prio_link)
230 reg |= IXGBE_TDTQ2TCCR_LSP;
232 IXGBE_WRITE_REG(hw, IXGBE_TDTQ2TCCR(i), reg);
239 * ixgbe_dcb_config_tx_data_arbiter_82598 - Config Tx data arbiter
240 * @hw: pointer to hardware structure
241 * @dcb_config: pointer to ixgbe_dcb_config structure
243 * Configure Tx Data Arbiter and credits for each traffic class.
245 s32 ixgbe_dcb_config_tx_data_arbiter_82598(struct ixgbe_hw *hw,
246 struct ixgbe_dcb_config *dcb_config)
248 struct tc_bw_alloc *p;
252 reg = IXGBE_READ_REG(hw, IXGBE_PDPMCS);
253 /* Enable Data Plane Arbiter */
254 reg &= ~IXGBE_PDPMCS_ARBDIS;
255 /* Enable DFP and Transmit Recycle Mode */
256 reg |= (IXGBE_PDPMCS_TPPAC | IXGBE_PDPMCS_TRM);
258 IXGBE_WRITE_REG(hw, IXGBE_PDPMCS, reg);
260 /* Configure traffic class credits and priority */
261 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
262 p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
263 reg = p->data_credits_refill;
264 reg |= (u32)(p->data_credits_max) << IXGBE_TDPT2TCCR_MCL_SHIFT;
265 reg |= (u32)(p->bwg_id) << IXGBE_TDPT2TCCR_BWG_SHIFT;
267 if (p->prio_type == prio_group)
268 reg |= IXGBE_TDPT2TCCR_GSP;
270 if (p->prio_type == prio_link)
271 reg |= IXGBE_TDPT2TCCR_LSP;
273 IXGBE_WRITE_REG(hw, IXGBE_TDPT2TCCR(i), reg);
276 /* Enable Tx packet buffer division */
277 reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL);
278 reg |= IXGBE_DTXCTL_ENDBUBD;
279 IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg);
285 * ixgbe_dcb_config_pfc_82598 - Config priority flow control
286 * @hw: pointer to hardware structure
287 * @dcb_config: pointer to ixgbe_dcb_config structure
289 * Configure Priority Flow Control for each traffic class.
291 s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw,
292 struct ixgbe_dcb_config *dcb_config)
294 u32 reg, rx_pba_size;
297 /* Enable Transmit Priority Flow Control */
298 reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
299 reg &= ~IXGBE_RMCS_TFCE_802_3X;
300 /* correct the reporting of our flow control status */
301 reg |= IXGBE_RMCS_TFCE_PRIORITY;
302 IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);
304 /* Enable Receive Priority Flow Control */
305 reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);
306 reg &= ~IXGBE_FCTRL_RFCE;
307 reg |= IXGBE_FCTRL_RPFCE;
308 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg);
311 * Configure flow control thresholds and enable priority flow control
312 * for each traffic class.
314 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
315 if (dcb_config->rx_pba_cfg == pba_equal) {
316 rx_pba_size = IXGBE_RXPBSIZE_64KB;
318 rx_pba_size = (i < 4) ? IXGBE_RXPBSIZE_80KB
319 : IXGBE_RXPBSIZE_48KB;
322 reg = ((rx_pba_size >> 5) & 0xFFF0);
323 if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx ||
324 dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full)
325 reg |= IXGBE_FCRTL_XONE;
327 IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), reg);
329 reg = ((rx_pba_size >> 2) & 0xFFF0);
330 if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx ||
331 dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full)
332 reg |= IXGBE_FCRTH_FCEN;
334 IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), reg);
337 /* Configure pause time */
338 for (i = 0; i < (MAX_TRAFFIC_CLASS >> 1); i++)
339 IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), 0x68006800);
341 /* Configure flow control refresh threshold value */
342 IXGBE_WRITE_REG(hw, IXGBE_FCRTV, 0x3400);
348 * ixgbe_dcb_config_tc_stats_82598 - Configure traffic class statistics
349 * @hw: pointer to hardware structure
351 * Configure queue statistics registers, all queues belonging to same traffic
352 * class uses a single set of queue statistics counters.
354 s32 ixgbe_dcb_config_tc_stats_82598(struct ixgbe_hw *hw)
360 /* Receive Queues stats setting - 8 queues per statistics reg */
361 for (i = 0, j = 0; i < 15 && j < 8; i = i + 2, j++) {
362 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i));
363 reg |= ((0x1010101) * j);
364 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
365 reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i + 1));
366 reg |= ((0x1010101) * j);
367 IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i + 1), reg);
369 /* Transmit Queues stats setting - 4 queues per statistics reg */
370 for (i = 0; i < 8; i++) {
371 reg = IXGBE_READ_REG(hw, IXGBE_TQSMR(i));
372 reg |= ((0x1010101) * i);
373 IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i), reg);
380 * ixgbe_dcb_hw_config_82598 - Config and enable DCB
381 * @hw: pointer to hardware structure
382 * @dcb_config: pointer to ixgbe_dcb_config structure
384 * Configure dcb settings and enable dcb mode.
386 s32 ixgbe_dcb_hw_config_82598(struct ixgbe_hw *hw,
387 struct ixgbe_dcb_config *dcb_config)
389 ixgbe_dcb_config_packet_buffers_82598(hw, dcb_config);
390 ixgbe_dcb_config_rx_arbiter_82598(hw, dcb_config);
391 ixgbe_dcb_config_tx_desc_arbiter_82598(hw, dcb_config);
392 ixgbe_dcb_config_tx_data_arbiter_82598(hw, dcb_config);
393 ixgbe_dcb_config_pfc_82598(hw, dcb_config);
394 ixgbe_dcb_config_tc_stats_82598(hw);