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235ea828 PW |
1 | /******************************************************************************* |
2 | ||
3 | Intel 10 Gigabit PCI Express Linux driver | |
4 | Copyright(c) 1999 - 2009 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 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
24 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | ||
26 | *******************************************************************************/ | |
27 | ||
28 | #include "ixgbe.h" | |
29 | #include "ixgbe_type.h" | |
30 | #include "ixgbe_dcb.h" | |
31 | #include "ixgbe_dcb_82599.h" | |
32 | ||
33 | /** | |
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. | |
38 | * | |
39 | * This function returns the status data for each of the Traffic Classes in use. | |
40 | */ | |
41 | s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw, | |
42 | struct ixgbe_hw_stats *stats, | |
43 | u8 tc_count) | |
44 | { | |
45 | int tc; | |
46 | ||
47 | if (tc_count > MAX_TRAFFIC_CLASS) | |
48 | return DCB_ERR_PARAM; | |
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)); | |
57 | /* Received Bytes */ | |
58 | stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc)); | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | /** | |
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. | |
69 | * | |
70 | * This function returns the CBFC status data for each of the Traffic Classes. | |
71 | */ | |
72 | s32 ixgbe_dcb_get_pfc_stats_82599(struct ixgbe_hw *hw, | |
73 | struct ixgbe_hw_stats *stats, | |
74 | u8 tc_count) | |
75 | { | |
76 | int tc; | |
77 | ||
78 | if (tc_count > MAX_TRAFFIC_CLASS) | |
79 | return DCB_ERR_PARAM; | |
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)); | |
85 | } | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | /** | |
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 | |
94 | * | |
95 | * Configure packet buffers for DCB mode. | |
96 | */ | |
97 | s32 ixgbe_dcb_config_packet_buffers_82599(struct ixgbe_hw *hw, | |
98 | struct ixgbe_dcb_config *dcb_config) | |
99 | { | |
100 | s32 ret_val = 0; | |
101 | u32 value = IXGBE_RXPBSIZE_64KB; | |
102 | u8 i = 0; | |
103 | ||
104 | /* Setup Rx packet buffer sizes */ | |
105 | switch (dcb_config->rx_pba_cfg) { | |
106 | case pba_80_48: | |
107 | /* Setup the first four at 80KB */ | |
108 | value = IXGBE_RXPBSIZE_80KB; | |
109 | for (; i < 4; i++) | |
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; | |
113 | /* Fall Through */ | |
114 | case pba_equal: | |
115 | default: | |
116 | for (; i < IXGBE_MAX_PACKET_BUFFERS; i++) | |
117 | IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value); | |
118 | ||
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); | |
125 | } | |
126 | break; | |
127 | } | |
128 | ||
129 | return ret_val; | |
130 | } | |
131 | ||
132 | /** | |
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 | |
136 | * | |
137 | * Configure Rx Packet Arbiter and credits for each traffic class. | |
138 | */ | |
139 | s32 ixgbe_dcb_config_rx_arbiter_82599(struct ixgbe_hw *hw, | |
140 | struct ixgbe_dcb_config *dcb_config) | |
141 | { | |
142 | struct tc_bw_alloc *p; | |
143 | u32 reg = 0; | |
144 | u32 credit_refill = 0; | |
145 | u32 credit_max = 0; | |
146 | u8 i = 0; | |
147 | ||
148 | /* Disable the arbiter before changing parameters */ | |
149 | IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, IXGBE_RTRPCS_ARBDIS); | |
150 | ||
151 | /* Map all traffic classes to their UP, 1 to 1 */ | |
152 | reg = 0; | |
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); | |
156 | ||
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]; | |
160 | ||
161 | credit_refill = p->data_credits_refill; | |
162 | credit_max = p->data_credits_max; | |
163 | reg = credit_refill | (credit_max << IXGBE_RTRPT4C_MCL_SHIFT); | |
164 | ||
165 | reg |= (u32)(p->bwg_id) << IXGBE_RTRPT4C_BWG_SHIFT; | |
166 | ||
167 | if (p->prio_type == prio_link) | |
168 | reg |= IXGBE_RTRPT4C_LSP; | |
169 | ||
170 | IXGBE_WRITE_REG(hw, IXGBE_RTRPT4C(i), reg); | |
171 | } | |
172 | ||
173 | /* | |
174 | * Configure Rx packet plane (recycle mode; WSP) and | |
175 | * enable arbiter | |
176 | */ | |
177 | reg = IXGBE_RTRPCS_RRM | IXGBE_RTRPCS_RAC; | |
178 | IXGBE_WRITE_REG(hw, IXGBE_RTRPCS, reg); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /** | |
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 | |
187 | * | |
188 | * Configure Tx Descriptor Arbiter and credits for each traffic class. | |
189 | */ | |
190 | s32 ixgbe_dcb_config_tx_desc_arbiter_82599(struct ixgbe_hw *hw, | |
191 | struct ixgbe_dcb_config *dcb_config) | |
192 | { | |
193 | struct tc_bw_alloc *p; | |
194 | u32 reg, max_credits; | |
195 | u8 i; | |
196 | ||
197 | /* Disable the arbiter before changing parameters */ | |
198 | IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, IXGBE_RTTDCS_ARBDIS); | |
199 | ||
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); | |
204 | } | |
205 | ||
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; | |
213 | ||
214 | if (p->prio_type == prio_group) | |
215 | reg |= IXGBE_RTTDT2C_GSP; | |
216 | ||
217 | if (p->prio_type == prio_link) | |
218 | reg |= IXGBE_RTTDT2C_LSP; | |
219 | ||
220 | IXGBE_WRITE_REG(hw, IXGBE_RTTDT2C(i), reg); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Configure Tx descriptor plane (recycle mode; WSP) and | |
225 | * enable arbiter | |
226 | */ | |
227 | reg = IXGBE_RTTDCS_TDPAC | IXGBE_RTTDCS_TDRM; | |
228 | IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | /** | |
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 | |
237 | * | |
238 | * Configure Tx Packet Arbiter and credits for each traffic class. | |
239 | */ | |
240 | s32 ixgbe_dcb_config_tx_data_arbiter_82599(struct ixgbe_hw *hw, | |
241 | struct ixgbe_dcb_config *dcb_config) | |
242 | { | |
243 | struct tc_bw_alloc *p; | |
244 | u32 reg; | |
245 | u8 i; | |
246 | ||
247 | /* Disable the arbiter before changing parameters */ | |
248 | IXGBE_WRITE_REG(hw, IXGBE_RTTPCS, IXGBE_RTTPCS_ARBDIS); | |
249 | ||
250 | /* Map all traffic classes to their UP, 1 to 1 */ | |
251 | reg = 0; | |
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); | |
255 | ||
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; | |
262 | ||
263 | if (p->prio_type == prio_group) | |
264 | reg |= IXGBE_RTTPT2C_GSP; | |
265 | ||
266 | if (p->prio_type == prio_link) | |
267 | reg |= IXGBE_RTTPT2C_LSP; | |
268 | ||
269 | IXGBE_WRITE_REG(hw, IXGBE_RTTPT2C(i), reg); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Configure Tx packet plane (recycle mode; SP; arb delay) and | |
274 | * enable arbiter | |
275 | */ | |
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); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /** | |
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 | |
287 | * | |
288 | * Configure Priority Flow Control (PFC) for each traffic class. | |
289 | */ | |
290 | s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, | |
291 | struct ixgbe_dcb_config *dcb_config) | |
292 | { | |
2f3889f4 | 293 | u32 i, reg, rx_pba_size; |
235ea828 PW |
294 | |
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++) | |
620fa036 | 298 | hw->mac.ops.fc_enable(hw, i); |
235ea828 PW |
299 | goto out; |
300 | } | |
301 | ||
235ea828 PW |
302 | /* Configure PFC Tx thresholds per TC */ |
303 | for (i = 0; i < MAX_TRAFFIC_CLASS; i++) { | |
2f3889f4 PW |
304 | if (dcb_config->rx_pba_cfg == pba_equal) |
305 | rx_pba_size = IXGBE_RXPBSIZE_64KB; | |
306 | else | |
307 | rx_pba_size = (i < 4) ? IXGBE_RXPBSIZE_80KB | |
308 | : IXGBE_RXPBSIZE_48KB; | |
309 | ||
310 | reg = ((rx_pba_size >> 5) & 0xFFE0); | |
235ea828 | 311 | if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full || |
2f3889f4 PW |
312 | dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) |
313 | reg |= IXGBE_FCRTL_XONE; | |
314 | IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg); | |
315 | ||
316 | reg = ((rx_pba_size >> 2) & 0xFFE0); | |
317 | if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full || | |
318 | dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) | |
319 | reg |= IXGBE_FCRTH_FCEN; | |
320 | IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg); | |
235ea828 PW |
321 | } |
322 | ||
323 | /* Configure pause time (2 TCs per register) */ | |
324 | reg = hw->fc.pause_time | (hw->fc.pause_time << 16); | |
325 | for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++) | |
326 | IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg); | |
327 | ||
328 | /* Configure flow control refresh threshold value */ | |
329 | IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2); | |
330 | ||
331 | /* Enable Transmit PFC */ | |
332 | reg = IXGBE_FCCFG_TFCE_PRIORITY; | |
333 | IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg); | |
334 | ||
335 | /* | |
336 | * Enable Receive PFC | |
337 | * We will always honor XOFF frames we receive when | |
338 | * we are in PFC mode. | |
339 | */ | |
340 | reg = IXGBE_READ_REG(hw, IXGBE_MFLCN); | |
341 | reg &= ~IXGBE_MFLCN_RFCE; | |
342 | reg |= IXGBE_MFLCN_RPFCE; | |
343 | IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg); | |
344 | out: | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /** | |
349 | * ixgbe_dcb_config_tc_stats_82599 - Config traffic class statistics | |
350 | * @hw: pointer to hardware structure | |
351 | * | |
352 | * Configure queue statistics registers, all queues belonging to same traffic | |
353 | * class uses a single set of queue statistics counters. | |
354 | */ | |
355 | s32 ixgbe_dcb_config_tc_stats_82599(struct ixgbe_hw *hw) | |
356 | { | |
357 | u32 reg = 0; | |
358 | u8 i = 0; | |
359 | ||
360 | /* | |
361 | * Receive Queues stats setting | |
362 | * 32 RQSMR registers, each configuring 4 queues. | |
363 | * Set all 16 queues of each TC to the same stat | |
364 | * with TC 'n' going to stat 'n'. | |
365 | */ | |
366 | for (i = 0; i < 32; i++) { | |
367 | reg = 0x01010101 * (i / 4); | |
368 | IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg); | |
369 | } | |
370 | /* | |
371 | * Transmit Queues stats setting | |
372 | * 32 TQSM registers, each controlling 4 queues. | |
373 | * Set all queues of each TC to the same stat | |
374 | * with TC 'n' going to stat 'n'. | |
375 | * Tx queues are allocated non-uniformly to TCs: | |
376 | * 32, 32, 16, 16, 8, 8, 8, 8. | |
377 | */ | |
378 | for (i = 0; i < 32; i++) { | |
379 | if (i < 8) | |
380 | reg = 0x00000000; | |
381 | else if (i < 16) | |
382 | reg = 0x01010101; | |
383 | else if (i < 20) | |
384 | reg = 0x02020202; | |
385 | else if (i < 24) | |
386 | reg = 0x03030303; | |
387 | else if (i < 26) | |
388 | reg = 0x04040404; | |
389 | else if (i < 28) | |
390 | reg = 0x05050505; | |
391 | else if (i < 30) | |
392 | reg = 0x06060606; | |
393 | else | |
394 | reg = 0x07070707; | |
395 | IXGBE_WRITE_REG(hw, IXGBE_TQSM(i), reg); | |
396 | } | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | /** | |
402 | * ixgbe_dcb_config_82599 - Configure general DCB parameters | |
403 | * @hw: pointer to hardware structure | |
404 | * @dcb_config: pointer to ixgbe_dcb_config structure | |
405 | * | |
406 | * Configure general DCB parameters. | |
407 | */ | |
408 | s32 ixgbe_dcb_config_82599(struct ixgbe_hw *hw) | |
409 | { | |
410 | u32 reg; | |
411 | u32 q; | |
412 | ||
413 | /* Disable the Tx desc arbiter so that MTQC can be changed */ | |
414 | reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS); | |
415 | reg |= IXGBE_RTTDCS_ARBDIS; | |
416 | IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); | |
417 | ||
418 | /* Enable DCB for Rx with 8 TCs */ | |
419 | reg = IXGBE_READ_REG(hw, IXGBE_MRQC); | |
420 | switch (reg & IXGBE_MRQC_MRQE_MASK) { | |
421 | case 0: | |
422 | case IXGBE_MRQC_RT4TCEN: | |
423 | /* RSS disabled cases */ | |
424 | reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN; | |
425 | break; | |
426 | case IXGBE_MRQC_RSSEN: | |
427 | case IXGBE_MRQC_RTRSS4TCEN: | |
428 | /* RSS enabled cases */ | |
429 | reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RTRSS8TCEN; | |
430 | break; | |
431 | default: | |
432 | /* Unsupported value, assume stale data, overwrite no RSS */ | |
433 | reg = (reg & ~IXGBE_MRQC_MRQE_MASK) | IXGBE_MRQC_RT8TCEN; | |
434 | } | |
435 | IXGBE_WRITE_REG(hw, IXGBE_MRQC, reg); | |
436 | ||
437 | /* Enable DCB for Tx with 8 TCs */ | |
438 | reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ; | |
439 | IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg); | |
440 | ||
441 | /* Disable drop for all queues */ | |
442 | for (q = 0; q < 128; q++) | |
443 | IXGBE_WRITE_REG(hw, IXGBE_QDE, q << IXGBE_QDE_IDX_SHIFT); | |
444 | ||
445 | /* Enable the Tx desc arbiter */ | |
446 | reg = IXGBE_READ_REG(hw, IXGBE_RTTDCS); | |
447 | reg &= ~IXGBE_RTTDCS_ARBDIS; | |
448 | IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, reg); | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | /** | |
454 | * ixgbe_dcb_hw_config_82599 - Configure and enable DCB | |
455 | * @hw: pointer to hardware structure | |
456 | * @dcb_config: pointer to ixgbe_dcb_config structure | |
457 | * | |
458 | * Configure dcb settings and enable dcb mode. | |
459 | */ | |
460 | s32 ixgbe_dcb_hw_config_82599(struct ixgbe_hw *hw, | |
461 | struct ixgbe_dcb_config *dcb_config) | |
462 | { | |
235ea828 PW |
463 | ixgbe_dcb_config_packet_buffers_82599(hw, dcb_config); |
464 | ixgbe_dcb_config_82599(hw); | |
465 | ixgbe_dcb_config_rx_arbiter_82599(hw, dcb_config); | |
466 | ixgbe_dcb_config_tx_desc_arbiter_82599(hw, dcb_config); | |
467 | ixgbe_dcb_config_tx_data_arbiter_82599(hw, dcb_config); | |
468 | ixgbe_dcb_config_pfc_82599(hw, dcb_config); | |
469 | ixgbe_dcb_config_tc_stats_82599(hw); | |
470 | ||
471 | return 0; | |
472 | } | |
473 |