1 /* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5 * * Redistributions of source code must retain the above copyright
6 * notice, this list of conditions and the following disclaimer.
7 * * Redistributions in binary form must reproduce the above copyright
8 * notice, this list of conditions and the following disclaimer in the
9 * documentation and/or other materials provided with the distribution.
10 * * Neither the name of Freescale Semiconductor nor the
11 * names of its contributors may be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * ALTERNATIVELY, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL") as published by the Free Software
16 * Foundation, either version 2 of that License or (at your option) any
17 * later version.
18 *
19 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "qman_priv.h"
32
33 #define DQRR_MAXFILL 15
34 #define EQCR_ITHRESH 4 /* if EQCR congests, interrupt threshold */
35 #define IRQNAME "QMan portal %d"
36 #define MAX_IRQNAME 16 /* big enough for "QMan portal %d" */
37 #define QMAN_POLL_LIMIT 32
38 #define QMAN_PIRQ_DQRR_ITHRESH 12
39 #define QMAN_DQRR_IT_MAX 15
40 #define QMAN_ITP_MAX 0xFFF
41 #define QMAN_PIRQ_MR_ITHRESH 4
42 #define QMAN_PIRQ_IPERIOD 100
43
44 /* Portal register assists */
45
46 #if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
47 /* Cache-inhibited register offsets */
48 #define QM_REG_EQCR_PI_CINH 0x3000
49 #define QM_REG_EQCR_CI_CINH 0x3040
50 #define QM_REG_EQCR_ITR 0x3080
51 #define QM_REG_DQRR_PI_CINH 0x3100
52 #define QM_REG_DQRR_CI_CINH 0x3140
53 #define QM_REG_DQRR_ITR 0x3180
54 #define QM_REG_DQRR_DCAP 0x31C0
55 #define QM_REG_DQRR_SDQCR 0x3200
56 #define QM_REG_DQRR_VDQCR 0x3240
57 #define QM_REG_DQRR_PDQCR 0x3280
58 #define QM_REG_MR_PI_CINH 0x3300
59 #define QM_REG_MR_CI_CINH 0x3340
60 #define QM_REG_MR_ITR 0x3380
61 #define QM_REG_CFG 0x3500
62 #define QM_REG_ISR 0x3600
63 #define QM_REG_IER 0x3640
64 #define QM_REG_ISDR 0x3680
65 #define QM_REG_IIR 0x36C0
66 #define QM_REG_ITPR 0x3740
67
68 /* Cache-enabled register offsets */
69 #define QM_CL_EQCR 0x0000
70 #define QM_CL_DQRR 0x1000
71 #define QM_CL_MR 0x2000
72 #define QM_CL_EQCR_PI_CENA 0x3000
73 #define QM_CL_EQCR_CI_CENA 0x3040
74 #define QM_CL_DQRR_PI_CENA 0x3100
75 #define QM_CL_DQRR_CI_CENA 0x3140
76 #define QM_CL_MR_PI_CENA 0x3300
77 #define QM_CL_MR_CI_CENA 0x3340
78 #define QM_CL_CR 0x3800
79 #define QM_CL_RR0 0x3900
80 #define QM_CL_RR1 0x3940
81
82 #else
83 /* Cache-inhibited register offsets */
84 #define QM_REG_EQCR_PI_CINH 0x0000
85 #define QM_REG_EQCR_CI_CINH 0x0004
86 #define QM_REG_EQCR_ITR 0x0008
87 #define QM_REG_DQRR_PI_CINH 0x0040
88 #define QM_REG_DQRR_CI_CINH 0x0044
89 #define QM_REG_DQRR_ITR 0x0048
90 #define QM_REG_DQRR_DCAP 0x0050
91 #define QM_REG_DQRR_SDQCR 0x0054
92 #define QM_REG_DQRR_VDQCR 0x0058
93 #define QM_REG_DQRR_PDQCR 0x005c
94 #define QM_REG_MR_PI_CINH 0x0080
95 #define QM_REG_MR_CI_CINH 0x0084
96 #define QM_REG_MR_ITR 0x0088
97 #define QM_REG_CFG 0x0100
98 #define QM_REG_ISR 0x0e00
99 #define QM_REG_IER 0x0e04
100 #define QM_REG_ISDR 0x0e08
101 #define QM_REG_IIR 0x0e0c
102 #define QM_REG_ITPR 0x0e14
103
104 /* Cache-enabled register offsets */
105 #define QM_CL_EQCR 0x0000
106 #define QM_CL_DQRR 0x1000
107 #define QM_CL_MR 0x2000
108 #define QM_CL_EQCR_PI_CENA 0x3000
109 #define QM_CL_EQCR_CI_CENA 0x3100
110 #define QM_CL_DQRR_PI_CENA 0x3200
111 #define QM_CL_DQRR_CI_CENA 0x3300
112 #define QM_CL_MR_PI_CENA 0x3400
113 #define QM_CL_MR_CI_CENA 0x3500
114 #define QM_CL_CR 0x3800
115 #define QM_CL_RR0 0x3900
116 #define QM_CL_RR1 0x3940
117 #endif
118
119 /*
120 * BTW, the drivers (and h/w programming model) already obtain the required
121 * synchronisation for portal accesses and data-dependencies. Use of barrier()s
122 * or other order-preserving primitives simply degrade performance. Hence the
123 * use of the __raw_*() interfaces, which simply ensure that the compiler treats
124 * the portal registers as volatile
125 */
126
127 /* Cache-enabled ring access */
128 #define qm_cl(base, idx) ((void *)base + ((idx) << 6))
129
130 /*
131 * Portal modes.
132 * Enum types;
133 * pmode == production mode
134 * cmode == consumption mode,
135 * dmode == h/w dequeue mode.
136 * Enum values use 3 letter codes. First letter matches the portal mode,
137 * remaining two letters indicate;
138 * ci == cache-inhibited portal register
139 * ce == cache-enabled portal register
140 * vb == in-band valid-bit (cache-enabled)
141 * dc == DCA (Discrete Consumption Acknowledgment), DQRR-only
142 * As for "enum qm_dqrr_dmode", it should be self-explanatory.
143 */
144 enum qm_eqcr_pmode { /* matches QCSP_CFG::EPM */
145 qm_eqcr_pci = 0, /* PI index, cache-inhibited */
146 qm_eqcr_pce = 1, /* PI index, cache-enabled */
147 qm_eqcr_pvb = 2 /* valid-bit */
148 };
149 enum qm_dqrr_dmode { /* matches QCSP_CFG::DP */
150 qm_dqrr_dpush = 0, /* SDQCR + VDQCR */
151 qm_dqrr_dpull = 1 /* PDQCR */
152 };
153 enum qm_dqrr_pmode { /* s/w-only */
154 qm_dqrr_pci, /* reads DQRR_PI_CINH */
155 qm_dqrr_pce, /* reads DQRR_PI_CENA */
156 qm_dqrr_pvb /* reads valid-bit */
157 };
158 enum qm_dqrr_cmode { /* matches QCSP_CFG::DCM */
159 qm_dqrr_cci = 0, /* CI index, cache-inhibited */
160 qm_dqrr_cce = 1, /* CI index, cache-enabled */
161 qm_dqrr_cdc = 2 /* Discrete Consumption Acknowledgment */
162 };
163 enum qm_mr_pmode { /* s/w-only */
164 qm_mr_pci, /* reads MR_PI_CINH */
165 qm_mr_pce, /* reads MR_PI_CENA */
166 qm_mr_pvb /* reads valid-bit */
167 };
168 enum qm_mr_cmode { /* matches QCSP_CFG::MM */
169 qm_mr_cci = 0, /* CI index, cache-inhibited */
170 qm_mr_cce = 1 /* CI index, cache-enabled */
171 };
172
173 /* --- Portal structures --- */
174
175 #define QM_EQCR_SIZE 8
176 #define QM_DQRR_SIZE 16
177 #define QM_MR_SIZE 8
178
179 /* "Enqueue Command" */
180 struct qm_eqcr_entry {
181 u8 _ncw_verb; /* writes to this are non-coherent */
182 u8 dca;
183 __be16 seqnum;
184 u8 __reserved[4];
185 __be32 fqid; /* 24-bit */
186 __be32 tag;
187 struct qm_fd fd;
188 u8 __reserved3[32];
189 } __packed __aligned(8);
190 #define QM_EQCR_VERB_VBIT 0x80
191 #define QM_EQCR_VERB_CMD_MASK 0x61 /* but only one value; */
192 #define QM_EQCR_VERB_CMD_ENQUEUE 0x01
193 #define QM_EQCR_SEQNUM_NESN 0x8000 /* Advance NESN */
194 #define QM_EQCR_SEQNUM_NLIS 0x4000 /* More fragments to come */
195 #define QM_EQCR_SEQNUM_SEQMASK 0x3fff /* sequence number goes here */
196
197 struct qm_eqcr {
198 struct qm_eqcr_entry *ring, *cursor;
199 u8 ci, available, ithresh, vbit;
200 #ifdef CONFIG_FSL_DPAA_CHECKING
201 u32 busy;
202 enum qm_eqcr_pmode pmode;
203 #endif
204 };
205
206 struct qm_dqrr {
207 const struct qm_dqrr_entry *ring, *cursor;
208 u8 pi, ci, fill, ithresh, vbit;
209 #ifdef CONFIG_FSL_DPAA_CHECKING
210 enum qm_dqrr_dmode dmode;
211 enum qm_dqrr_pmode pmode;
212 enum qm_dqrr_cmode cmode;
213 #endif
214 };
215
216 struct qm_mr {
217 union qm_mr_entry *ring, *cursor;
218 u8 pi, ci, fill, ithresh, vbit;
219 #ifdef CONFIG_FSL_DPAA_CHECKING
220 enum qm_mr_pmode pmode;
221 enum qm_mr_cmode cmode;
222 #endif
223 };
224
225 /* MC (Management Command) command */
226 /* "FQ" command layout */
227 struct qm_mcc_fq {
228 u8 _ncw_verb;
229 u8 __reserved1[3];
230 __be32 fqid; /* 24-bit */
231 u8 __reserved2[56];
232 } __packed;
233
234 /* "CGR" command layout */
235 struct qm_mcc_cgr {
236 u8 _ncw_verb;
237 u8 __reserved1[30];
238 u8 cgid;
239 u8 __reserved2[32];
240 };
241
242 #define QM_MCC_VERB_VBIT 0x80
243 #define QM_MCC_VERB_MASK 0x7f /* where the verb contains; */
244 #define QM_MCC_VERB_INITFQ_PARKED 0x40
245 #define QM_MCC_VERB_INITFQ_SCHED 0x41
246 #define QM_MCC_VERB_QUERYFQ 0x44
247 #define QM_MCC_VERB_QUERYFQ_NP 0x45 /* "non-programmable" fields */
248 #define QM_MCC_VERB_QUERYWQ 0x46
249 #define QM_MCC_VERB_QUERYWQ_DEDICATED 0x47
250 #define QM_MCC_VERB_ALTER_SCHED 0x48 /* Schedule FQ */
251 #define QM_MCC_VERB_ALTER_FE 0x49 /* Force Eligible FQ */
252 #define QM_MCC_VERB_ALTER_RETIRE 0x4a /* Retire FQ */
253 #define QM_MCC_VERB_ALTER_OOS 0x4b /* Take FQ out of service */
254 #define QM_MCC_VERB_ALTER_FQXON 0x4d /* FQ XON */
255 #define QM_MCC_VERB_ALTER_FQXOFF 0x4e /* FQ XOFF */
256 #define QM_MCC_VERB_INITCGR 0x50
257 #define QM_MCC_VERB_MODIFYCGR 0x51
258 #define QM_MCC_VERB_CGRTESTWRITE 0x52
259 #define QM_MCC_VERB_QUERYCGR 0x58
260 #define QM_MCC_VERB_QUERYCONGESTION 0x59
261 union qm_mc_command {
262 struct {
263 u8 _ncw_verb; /* writes to this are non-coherent */
264 u8 __reserved[63];
265 };
266 struct qm_mcc_initfq initfq;
267 struct qm_mcc_initcgr initcgr;
268 struct qm_mcc_fq fq;
269 struct qm_mcc_cgr cgr;
270 };
271
272 /* MC (Management Command) result */
273 /* "Query FQ" */
274 struct qm_mcr_queryfq {
275 u8 verb;
276 u8 result;
277 u8 __reserved1[8];
278 struct qm_fqd fqd; /* the FQD fields are here */
279 u8 __reserved2[30];
280 } __packed;
281
282 /* "Alter FQ State Commands" */
283 struct qm_mcr_alterfq {
284 u8 verb;
285 u8 result;
286 u8 fqs; /* Frame Queue Status */
287 u8 __reserved1[61];
288 };
289 #define QM_MCR_VERB_RRID 0x80
290 #define QM_MCR_VERB_MASK QM_MCC_VERB_MASK
291 #define QM_MCR_VERB_INITFQ_PARKED QM_MCC_VERB_INITFQ_PARKED
292 #define QM_MCR_VERB_INITFQ_SCHED QM_MCC_VERB_INITFQ_SCHED
293 #define QM_MCR_VERB_QUERYFQ QM_MCC_VERB_QUERYFQ
294 #define QM_MCR_VERB_QUERYFQ_NP QM_MCC_VERB_QUERYFQ_NP
295 #define QM_MCR_VERB_QUERYWQ QM_MCC_VERB_QUERYWQ
296 #define QM_MCR_VERB_QUERYWQ_DEDICATED QM_MCC_VERB_QUERYWQ_DEDICATED
297 #define QM_MCR_VERB_ALTER_SCHED QM_MCC_VERB_ALTER_SCHED
298 #define QM_MCR_VERB_ALTER_FE QM_MCC_VERB_ALTER_FE
299 #define QM_MCR_VERB_ALTER_RETIRE QM_MCC_VERB_ALTER_RETIRE
300 #define QM_MCR_VERB_ALTER_OOS QM_MCC_VERB_ALTER_OOS
301 #define QM_MCR_RESULT_NULL 0x00
302 #define QM_MCR_RESULT_OK 0xf0
303 #define QM_MCR_RESULT_ERR_FQID 0xf1
304 #define QM_MCR_RESULT_ERR_FQSTATE 0xf2
305 #define QM_MCR_RESULT_ERR_NOTEMPTY 0xf3 /* OOS fails if FQ is !empty */
306 #define QM_MCR_RESULT_ERR_BADCHANNEL 0xf4
307 #define QM_MCR_RESULT_PENDING 0xf8
308 #define QM_MCR_RESULT_ERR_BADCOMMAND 0xff
309 #define QM_MCR_FQS_ORLPRESENT 0x02 /* ORL fragments to come */
310 #define QM_MCR_FQS_NOTEMPTY 0x01 /* FQ has enqueued frames */
311 #define QM_MCR_TIMEOUT 10000 /* us */
312 union qm_mc_result {
313 struct {
314 u8 verb;
315 u8 result;
316 u8 __reserved1[62];
317 };
318 struct qm_mcr_queryfq queryfq;
319 struct qm_mcr_alterfq alterfq;
320 struct qm_mcr_querycgr querycgr;
321 struct qm_mcr_querycongestion querycongestion;
322 struct qm_mcr_querywq querywq;
323 struct qm_mcr_queryfq_np queryfq_np;
324 };
325
326 struct qm_mc {
327 union qm_mc_command *cr;
328 union qm_mc_result *rr;
329 u8 rridx, vbit;
330 #ifdef CONFIG_FSL_DPAA_CHECKING
331 enum {
332 /* Can be _mc_start()ed */
333 qman_mc_idle,
334 /* Can be _mc_commit()ed or _mc_abort()ed */
335 qman_mc_user,
336 /* Can only be _mc_retry()ed */
337 qman_mc_hw
338 } state;
339 #endif
340 };
341
342 struct qm_addr {
343 void *ce; /* cache-enabled */
344 __be32 *ce_be; /* same value as above but for direct access */
345 void __iomem *ci; /* cache-inhibited */
346 };
347
348 struct qm_portal {
349 /*
350 * In the non-CONFIG_FSL_DPAA_CHECKING case, the following stuff up to
351 * and including 'mc' fits within a cacheline (yay!). The 'config' part
352 * is setup-only, so isn't a cause for a concern. In other words, don't
353 * rearrange this structure on a whim, there be dragons ...
354 */
355 struct qm_addr addr;
356 struct qm_eqcr eqcr;
357 struct qm_dqrr dqrr;
358 struct qm_mr mr;
359 struct qm_mc mc;
360 } ____cacheline_aligned;
361
362 /* Cache-inhibited register access. */
qm_in(struct qm_portal * p,u32 offset)363 static inline u32 qm_in(struct qm_portal *p, u32 offset)
364 {
365 return ioread32be(p->addr.ci + offset);
366 }
367
qm_out(struct qm_portal * p,u32 offset,u32 val)368 static inline void qm_out(struct qm_portal *p, u32 offset, u32 val)
369 {
370 iowrite32be(val, p->addr.ci + offset);
371 }
372
373 /* Cache Enabled Portal Access */
qm_cl_invalidate(struct qm_portal * p,u32 offset)374 static inline void qm_cl_invalidate(struct qm_portal *p, u32 offset)
375 {
376 dpaa_invalidate(p->addr.ce + offset);
377 }
378
qm_cl_touch_ro(struct qm_portal * p,u32 offset)379 static inline void qm_cl_touch_ro(struct qm_portal *p, u32 offset)
380 {
381 dpaa_touch_ro(p->addr.ce + offset);
382 }
383
qm_ce_in(struct qm_portal * p,u32 offset)384 static inline u32 qm_ce_in(struct qm_portal *p, u32 offset)
385 {
386 return be32_to_cpu(*(p->addr.ce_be + (offset/4)));
387 }
388
389 /* --- EQCR API --- */
390
391 #define EQCR_SHIFT ilog2(sizeof(struct qm_eqcr_entry))
392 #define EQCR_CARRY (uintptr_t)(QM_EQCR_SIZE << EQCR_SHIFT)
393
394 /* Bit-wise logic to wrap a ring pointer by clearing the "carry bit" */
eqcr_carryclear(struct qm_eqcr_entry * p)395 static struct qm_eqcr_entry *eqcr_carryclear(struct qm_eqcr_entry *p)
396 {
397 uintptr_t addr = (uintptr_t)p;
398
399 addr &= ~EQCR_CARRY;
400
401 return (struct qm_eqcr_entry *)addr;
402 }
403
404 /* Bit-wise logic to convert a ring pointer to a ring index */
eqcr_ptr2idx(struct qm_eqcr_entry * e)405 static int eqcr_ptr2idx(struct qm_eqcr_entry *e)
406 {
407 return ((uintptr_t)e >> EQCR_SHIFT) & (QM_EQCR_SIZE - 1);
408 }
409
410 /* Increment the 'cursor' ring pointer, taking 'vbit' into account */
eqcr_inc(struct qm_eqcr * eqcr)411 static inline void eqcr_inc(struct qm_eqcr *eqcr)
412 {
413 /* increment to the next EQCR pointer and handle overflow and 'vbit' */
414 struct qm_eqcr_entry *partial = eqcr->cursor + 1;
415
416 eqcr->cursor = eqcr_carryclear(partial);
417 if (partial != eqcr->cursor)
418 eqcr->vbit ^= QM_EQCR_VERB_VBIT;
419 }
420
qm_eqcr_init(struct qm_portal * portal,enum qm_eqcr_pmode pmode,unsigned int eq_stash_thresh,int eq_stash_prio)421 static inline int qm_eqcr_init(struct qm_portal *portal,
422 enum qm_eqcr_pmode pmode,
423 unsigned int eq_stash_thresh,
424 int eq_stash_prio)
425 {
426 struct qm_eqcr *eqcr = &portal->eqcr;
427 u32 cfg;
428 u8 pi;
429
430 eqcr->ring = portal->addr.ce + QM_CL_EQCR;
431 eqcr->ci = qm_in(portal, QM_REG_EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);
432 qm_cl_invalidate(portal, QM_CL_EQCR_CI_CENA);
433 pi = qm_in(portal, QM_REG_EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
434 eqcr->cursor = eqcr->ring + pi;
435 eqcr->vbit = (qm_in(portal, QM_REG_EQCR_PI_CINH) & QM_EQCR_SIZE) ?
436 QM_EQCR_VERB_VBIT : 0;
437 eqcr->available = QM_EQCR_SIZE - 1 -
438 dpaa_cyc_diff(QM_EQCR_SIZE, eqcr->ci, pi);
439 eqcr->ithresh = qm_in(portal, QM_REG_EQCR_ITR);
440 #ifdef CONFIG_FSL_DPAA_CHECKING
441 eqcr->busy = 0;
442 eqcr->pmode = pmode;
443 #endif
444 cfg = (qm_in(portal, QM_REG_CFG) & 0x00ffffff) |
445 (eq_stash_thresh << 28) | /* QCSP_CFG: EST */
446 (eq_stash_prio << 26) | /* QCSP_CFG: EP */
447 ((pmode & 0x3) << 24); /* QCSP_CFG::EPM */
448 qm_out(portal, QM_REG_CFG, cfg);
449 return 0;
450 }
451
qm_eqcr_finish(struct qm_portal * portal)452 static inline void qm_eqcr_finish(struct qm_portal *portal)
453 {
454 struct qm_eqcr *eqcr = &portal->eqcr;
455 u8 pi = qm_in(portal, QM_REG_EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
456 u8 ci = qm_in(portal, QM_REG_EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);
457
458 DPAA_ASSERT(!eqcr->busy);
459 if (pi != eqcr_ptr2idx(eqcr->cursor))
460 pr_crit("losing uncommitted EQCR entries\n");
461 if (ci != eqcr->ci)
462 pr_crit("missing existing EQCR completions\n");
463 if (eqcr->ci != eqcr_ptr2idx(eqcr->cursor))
464 pr_crit("EQCR destroyed unquiesced\n");
465 }
466
qm_eqcr_start_no_stash(struct qm_portal * portal)467 static inline struct qm_eqcr_entry *qm_eqcr_start_no_stash(struct qm_portal
468 *portal)
469 {
470 struct qm_eqcr *eqcr = &portal->eqcr;
471
472 DPAA_ASSERT(!eqcr->busy);
473 if (!eqcr->available)
474 return NULL;
475
476 #ifdef CONFIG_FSL_DPAA_CHECKING
477 eqcr->busy = 1;
478 #endif
479 dpaa_zero(eqcr->cursor);
480 return eqcr->cursor;
481 }
482
qm_eqcr_start_stash(struct qm_portal * portal)483 static inline struct qm_eqcr_entry *qm_eqcr_start_stash(struct qm_portal
484 *portal)
485 {
486 struct qm_eqcr *eqcr = &portal->eqcr;
487 u8 diff, old_ci;
488
489 DPAA_ASSERT(!eqcr->busy);
490 if (!eqcr->available) {
491 old_ci = eqcr->ci;
492 eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) &
493 (QM_EQCR_SIZE - 1);
494 diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
495 eqcr->available += diff;
496 if (!diff)
497 return NULL;
498 }
499 #ifdef CONFIG_FSL_DPAA_CHECKING
500 eqcr->busy = 1;
501 #endif
502 dpaa_zero(eqcr->cursor);
503 return eqcr->cursor;
504 }
505
eqcr_commit_checks(struct qm_eqcr * eqcr)506 static inline void eqcr_commit_checks(struct qm_eqcr *eqcr)
507 {
508 DPAA_ASSERT(eqcr->busy);
509 DPAA_ASSERT(!(be32_to_cpu(eqcr->cursor->fqid) & ~QM_FQID_MASK));
510 DPAA_ASSERT(eqcr->available >= 1);
511 }
512
qm_eqcr_pvb_commit(struct qm_portal * portal,u8 myverb)513 static inline void qm_eqcr_pvb_commit(struct qm_portal *portal, u8 myverb)
514 {
515 struct qm_eqcr *eqcr = &portal->eqcr;
516 struct qm_eqcr_entry *eqcursor;
517
518 eqcr_commit_checks(eqcr);
519 DPAA_ASSERT(eqcr->pmode == qm_eqcr_pvb);
520 dma_wmb();
521 eqcursor = eqcr->cursor;
522 eqcursor->_ncw_verb = myverb | eqcr->vbit;
523 dpaa_flush(eqcursor);
524 eqcr_inc(eqcr);
525 eqcr->available--;
526 #ifdef CONFIG_FSL_DPAA_CHECKING
527 eqcr->busy = 0;
528 #endif
529 }
530
qm_eqcr_cce_prefetch(struct qm_portal * portal)531 static inline void qm_eqcr_cce_prefetch(struct qm_portal *portal)
532 {
533 qm_cl_touch_ro(portal, QM_CL_EQCR_CI_CENA);
534 }
535
qm_eqcr_cce_update(struct qm_portal * portal)536 static inline u8 qm_eqcr_cce_update(struct qm_portal *portal)
537 {
538 struct qm_eqcr *eqcr = &portal->eqcr;
539 u8 diff, old_ci = eqcr->ci;
540
541 eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) & (QM_EQCR_SIZE - 1);
542 qm_cl_invalidate(portal, QM_CL_EQCR_CI_CENA);
543 diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
544 eqcr->available += diff;
545 return diff;
546 }
547
qm_eqcr_set_ithresh(struct qm_portal * portal,u8 ithresh)548 static inline void qm_eqcr_set_ithresh(struct qm_portal *portal, u8 ithresh)
549 {
550 struct qm_eqcr *eqcr = &portal->eqcr;
551
552 eqcr->ithresh = ithresh;
553 qm_out(portal, QM_REG_EQCR_ITR, ithresh);
554 }
555
qm_eqcr_get_avail(struct qm_portal * portal)556 static inline u8 qm_eqcr_get_avail(struct qm_portal *portal)
557 {
558 struct qm_eqcr *eqcr = &portal->eqcr;
559
560 return eqcr->available;
561 }
562
qm_eqcr_get_fill(struct qm_portal * portal)563 static inline u8 qm_eqcr_get_fill(struct qm_portal *portal)
564 {
565 struct qm_eqcr *eqcr = &portal->eqcr;
566
567 return QM_EQCR_SIZE - 1 - eqcr->available;
568 }
569
570 /* --- DQRR API --- */
571
572 #define DQRR_SHIFT ilog2(sizeof(struct qm_dqrr_entry))
573 #define DQRR_CARRY (uintptr_t)(QM_DQRR_SIZE << DQRR_SHIFT)
574
dqrr_carryclear(const struct qm_dqrr_entry * p)575 static const struct qm_dqrr_entry *dqrr_carryclear(
576 const struct qm_dqrr_entry *p)
577 {
578 uintptr_t addr = (uintptr_t)p;
579
580 addr &= ~DQRR_CARRY;
581
582 return (const struct qm_dqrr_entry *)addr;
583 }
584
dqrr_ptr2idx(const struct qm_dqrr_entry * e)585 static inline int dqrr_ptr2idx(const struct qm_dqrr_entry *e)
586 {
587 return ((uintptr_t)e >> DQRR_SHIFT) & (QM_DQRR_SIZE - 1);
588 }
589
dqrr_inc(const struct qm_dqrr_entry * e)590 static const struct qm_dqrr_entry *dqrr_inc(const struct qm_dqrr_entry *e)
591 {
592 return dqrr_carryclear(e + 1);
593 }
594
qm_dqrr_set_maxfill(struct qm_portal * portal,u8 mf)595 static inline void qm_dqrr_set_maxfill(struct qm_portal *portal, u8 mf)
596 {
597 qm_out(portal, QM_REG_CFG, (qm_in(portal, QM_REG_CFG) & 0xff0fffff) |
598 ((mf & (QM_DQRR_SIZE - 1)) << 20));
599 }
600
qm_dqrr_init(struct qm_portal * portal,const struct qm_portal_config * config,enum qm_dqrr_dmode dmode,enum qm_dqrr_pmode pmode,enum qm_dqrr_cmode cmode,u8 max_fill)601 static inline int qm_dqrr_init(struct qm_portal *portal,
602 const struct qm_portal_config *config,
603 enum qm_dqrr_dmode dmode,
604 enum qm_dqrr_pmode pmode,
605 enum qm_dqrr_cmode cmode, u8 max_fill)
606 {
607 struct qm_dqrr *dqrr = &portal->dqrr;
608 u32 cfg;
609
610 /* Make sure the DQRR will be idle when we enable */
611 qm_out(portal, QM_REG_DQRR_SDQCR, 0);
612 qm_out(portal, QM_REG_DQRR_VDQCR, 0);
613 qm_out(portal, QM_REG_DQRR_PDQCR, 0);
614 dqrr->ring = portal->addr.ce + QM_CL_DQRR;
615 dqrr->pi = qm_in(portal, QM_REG_DQRR_PI_CINH) & (QM_DQRR_SIZE - 1);
616 dqrr->ci = qm_in(portal, QM_REG_DQRR_CI_CINH) & (QM_DQRR_SIZE - 1);
617 dqrr->cursor = dqrr->ring + dqrr->ci;
618 dqrr->fill = dpaa_cyc_diff(QM_DQRR_SIZE, dqrr->ci, dqrr->pi);
619 dqrr->vbit = (qm_in(portal, QM_REG_DQRR_PI_CINH) & QM_DQRR_SIZE) ?
620 QM_DQRR_VERB_VBIT : 0;
621 dqrr->ithresh = qm_in(portal, QM_REG_DQRR_ITR);
622 #ifdef CONFIG_FSL_DPAA_CHECKING
623 dqrr->dmode = dmode;
624 dqrr->pmode = pmode;
625 dqrr->cmode = cmode;
626 #endif
627 /* Invalidate every ring entry before beginning */
628 for (cfg = 0; cfg < QM_DQRR_SIZE; cfg++)
629 dpaa_invalidate(qm_cl(dqrr->ring, cfg));
630 cfg = (qm_in(portal, QM_REG_CFG) & 0xff000f00) |
631 ((max_fill & (QM_DQRR_SIZE - 1)) << 20) | /* DQRR_MF */
632 ((dmode & 1) << 18) | /* DP */
633 ((cmode & 3) << 16) | /* DCM */
634 0xa0 | /* RE+SE */
635 (0 ? 0x40 : 0) | /* Ignore RP */
636 (0 ? 0x10 : 0); /* Ignore SP */
637 qm_out(portal, QM_REG_CFG, cfg);
638 qm_dqrr_set_maxfill(portal, max_fill);
639 return 0;
640 }
641
qm_dqrr_finish(struct qm_portal * portal)642 static inline void qm_dqrr_finish(struct qm_portal *portal)
643 {
644 #ifdef CONFIG_FSL_DPAA_CHECKING
645 struct qm_dqrr *dqrr = &portal->dqrr;
646
647 if (dqrr->cmode != qm_dqrr_cdc &&
648 dqrr->ci != dqrr_ptr2idx(dqrr->cursor))
649 pr_crit("Ignoring completed DQRR entries\n");
650 #endif
651 }
652
qm_dqrr_current(struct qm_portal * portal)653 static inline const struct qm_dqrr_entry *qm_dqrr_current(
654 struct qm_portal *portal)
655 {
656 struct qm_dqrr *dqrr = &portal->dqrr;
657
658 if (!dqrr->fill)
659 return NULL;
660 return dqrr->cursor;
661 }
662
qm_dqrr_next(struct qm_portal * portal)663 static inline u8 qm_dqrr_next(struct qm_portal *portal)
664 {
665 struct qm_dqrr *dqrr = &portal->dqrr;
666
667 DPAA_ASSERT(dqrr->fill);
668 dqrr->cursor = dqrr_inc(dqrr->cursor);
669 return --dqrr->fill;
670 }
671
qm_dqrr_pvb_update(struct qm_portal * portal)672 static inline void qm_dqrr_pvb_update(struct qm_portal *portal)
673 {
674 struct qm_dqrr *dqrr = &portal->dqrr;
675 struct qm_dqrr_entry *res = qm_cl(dqrr->ring, dqrr->pi);
676
677 DPAA_ASSERT(dqrr->pmode == qm_dqrr_pvb);
678 #ifndef CONFIG_FSL_PAMU
679 /*
680 * If PAMU is not available we need to invalidate the cache.
681 * When PAMU is available the cache is updated by stash
682 */
683 dpaa_invalidate_touch_ro(res);
684 #endif
685 if ((res->verb & QM_DQRR_VERB_VBIT) == dqrr->vbit) {
686 dqrr->pi = (dqrr->pi + 1) & (QM_DQRR_SIZE - 1);
687 if (!dqrr->pi)
688 dqrr->vbit ^= QM_DQRR_VERB_VBIT;
689 dqrr->fill++;
690 }
691 }
692
qm_dqrr_cdc_consume_1ptr(struct qm_portal * portal,const struct qm_dqrr_entry * dq,int park)693 static inline void qm_dqrr_cdc_consume_1ptr(struct qm_portal *portal,
694 const struct qm_dqrr_entry *dq,
695 int park)
696 {
697 __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;
698 int idx = dqrr_ptr2idx(dq);
699
700 DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
701 DPAA_ASSERT((dqrr->ring + idx) == dq);
702 DPAA_ASSERT(idx < QM_DQRR_SIZE);
703 qm_out(portal, QM_REG_DQRR_DCAP, (0 << 8) | /* DQRR_DCAP::S */
704 ((park ? 1 : 0) << 6) | /* DQRR_DCAP::PK */
705 idx); /* DQRR_DCAP::DCAP_CI */
706 }
707
qm_dqrr_cdc_consume_n(struct qm_portal * portal,u32 bitmask)708 static inline void qm_dqrr_cdc_consume_n(struct qm_portal *portal, u32 bitmask)
709 {
710 __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;
711
712 DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
713 qm_out(portal, QM_REG_DQRR_DCAP, (1 << 8) | /* DQRR_DCAP::S */
714 (bitmask << 16)); /* DQRR_DCAP::DCAP_CI */
715 }
716
qm_dqrr_sdqcr_set(struct qm_portal * portal,u32 sdqcr)717 static inline void qm_dqrr_sdqcr_set(struct qm_portal *portal, u32 sdqcr)
718 {
719 qm_out(portal, QM_REG_DQRR_SDQCR, sdqcr);
720 }
721
qm_dqrr_vdqcr_set(struct qm_portal * portal,u32 vdqcr)722 static inline void qm_dqrr_vdqcr_set(struct qm_portal *portal, u32 vdqcr)
723 {
724 qm_out(portal, QM_REG_DQRR_VDQCR, vdqcr);
725 }
726
qm_dqrr_set_ithresh(struct qm_portal * portal,u8 ithresh)727 static inline int qm_dqrr_set_ithresh(struct qm_portal *portal, u8 ithresh)
728 {
729
730 if (ithresh > QMAN_DQRR_IT_MAX)
731 return -EINVAL;
732
733 qm_out(portal, QM_REG_DQRR_ITR, ithresh);
734
735 return 0;
736 }
737
738 /* --- MR API --- */
739
740 #define MR_SHIFT ilog2(sizeof(union qm_mr_entry))
741 #define MR_CARRY (uintptr_t)(QM_MR_SIZE << MR_SHIFT)
742
mr_carryclear(union qm_mr_entry * p)743 static union qm_mr_entry *mr_carryclear(union qm_mr_entry *p)
744 {
745 uintptr_t addr = (uintptr_t)p;
746
747 addr &= ~MR_CARRY;
748
749 return (union qm_mr_entry *)addr;
750 }
751
mr_ptr2idx(const union qm_mr_entry * e)752 static inline int mr_ptr2idx(const union qm_mr_entry *e)
753 {
754 return ((uintptr_t)e >> MR_SHIFT) & (QM_MR_SIZE - 1);
755 }
756
mr_inc(union qm_mr_entry * e)757 static inline union qm_mr_entry *mr_inc(union qm_mr_entry *e)
758 {
759 return mr_carryclear(e + 1);
760 }
761
qm_mr_init(struct qm_portal * portal,enum qm_mr_pmode pmode,enum qm_mr_cmode cmode)762 static inline int qm_mr_init(struct qm_portal *portal, enum qm_mr_pmode pmode,
763 enum qm_mr_cmode cmode)
764 {
765 struct qm_mr *mr = &portal->mr;
766 u32 cfg;
767
768 mr->ring = portal->addr.ce + QM_CL_MR;
769 mr->pi = qm_in(portal, QM_REG_MR_PI_CINH) & (QM_MR_SIZE - 1);
770 mr->ci = qm_in(portal, QM_REG_MR_CI_CINH) & (QM_MR_SIZE - 1);
771 mr->cursor = mr->ring + mr->ci;
772 mr->fill = dpaa_cyc_diff(QM_MR_SIZE, mr->ci, mr->pi);
773 mr->vbit = (qm_in(portal, QM_REG_MR_PI_CINH) & QM_MR_SIZE)
774 ? QM_MR_VERB_VBIT : 0;
775 mr->ithresh = qm_in(portal, QM_REG_MR_ITR);
776 #ifdef CONFIG_FSL_DPAA_CHECKING
777 mr->pmode = pmode;
778 mr->cmode = cmode;
779 #endif
780 cfg = (qm_in(portal, QM_REG_CFG) & 0xfffff0ff) |
781 ((cmode & 1) << 8); /* QCSP_CFG:MM */
782 qm_out(portal, QM_REG_CFG, cfg);
783 return 0;
784 }
785
qm_mr_finish(struct qm_portal * portal)786 static inline void qm_mr_finish(struct qm_portal *portal)
787 {
788 struct qm_mr *mr = &portal->mr;
789
790 if (mr->ci != mr_ptr2idx(mr->cursor))
791 pr_crit("Ignoring completed MR entries\n");
792 }
793
qm_mr_current(struct qm_portal * portal)794 static inline const union qm_mr_entry *qm_mr_current(struct qm_portal *portal)
795 {
796 struct qm_mr *mr = &portal->mr;
797
798 if (!mr->fill)
799 return NULL;
800 return mr->cursor;
801 }
802
qm_mr_next(struct qm_portal * portal)803 static inline int qm_mr_next(struct qm_portal *portal)
804 {
805 struct qm_mr *mr = &portal->mr;
806
807 DPAA_ASSERT(mr->fill);
808 mr->cursor = mr_inc(mr->cursor);
809 return --mr->fill;
810 }
811
qm_mr_pvb_update(struct qm_portal * portal)812 static inline void qm_mr_pvb_update(struct qm_portal *portal)
813 {
814 struct qm_mr *mr = &portal->mr;
815 union qm_mr_entry *res = qm_cl(mr->ring, mr->pi);
816
817 DPAA_ASSERT(mr->pmode == qm_mr_pvb);
818
819 if ((res->verb & QM_MR_VERB_VBIT) == mr->vbit) {
820 mr->pi = (mr->pi + 1) & (QM_MR_SIZE - 1);
821 if (!mr->pi)
822 mr->vbit ^= QM_MR_VERB_VBIT;
823 mr->fill++;
824 res = mr_inc(res);
825 }
826 dpaa_invalidate_touch_ro(res);
827 }
828
qm_mr_cci_consume(struct qm_portal * portal,u8 num)829 static inline void qm_mr_cci_consume(struct qm_portal *portal, u8 num)
830 {
831 struct qm_mr *mr = &portal->mr;
832
833 DPAA_ASSERT(mr->cmode == qm_mr_cci);
834 mr->ci = (mr->ci + num) & (QM_MR_SIZE - 1);
835 qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
836 }
837
qm_mr_cci_consume_to_current(struct qm_portal * portal)838 static inline void qm_mr_cci_consume_to_current(struct qm_portal *portal)
839 {
840 struct qm_mr *mr = &portal->mr;
841
842 DPAA_ASSERT(mr->cmode == qm_mr_cci);
843 mr->ci = mr_ptr2idx(mr->cursor);
844 qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
845 }
846
qm_mr_set_ithresh(struct qm_portal * portal,u8 ithresh)847 static inline void qm_mr_set_ithresh(struct qm_portal *portal, u8 ithresh)
848 {
849 qm_out(portal, QM_REG_MR_ITR, ithresh);
850 }
851
852 /* --- Management command API --- */
853
qm_mc_init(struct qm_portal * portal)854 static inline int qm_mc_init(struct qm_portal *portal)
855 {
856 u8 rr0, rr1;
857 struct qm_mc *mc = &portal->mc;
858
859 mc->cr = portal->addr.ce + QM_CL_CR;
860 mc->rr = portal->addr.ce + QM_CL_RR0;
861 /*
862 * The expected valid bit polarity for the next CR command is 0
863 * if RR1 contains a valid response, and is 1 if RR0 contains a
864 * valid response. If both RR contain all 0, this indicates either
865 * that no command has been executed since reset (in which case the
866 * expected valid bit polarity is 1)
867 */
868 rr0 = mc->rr->verb;
869 rr1 = (mc->rr+1)->verb;
870 if ((rr0 == 0 && rr1 == 0) || rr0 != 0)
871 mc->rridx = 1;
872 else
873 mc->rridx = 0;
874 mc->vbit = mc->rridx ? QM_MCC_VERB_VBIT : 0;
875 #ifdef CONFIG_FSL_DPAA_CHECKING
876 mc->state = qman_mc_idle;
877 #endif
878 return 0;
879 }
880
qm_mc_finish(struct qm_portal * portal)881 static inline void qm_mc_finish(struct qm_portal *portal)
882 {
883 #ifdef CONFIG_FSL_DPAA_CHECKING
884 struct qm_mc *mc = &portal->mc;
885
886 DPAA_ASSERT(mc->state == qman_mc_idle);
887 if (mc->state != qman_mc_idle)
888 pr_crit("Losing incomplete MC command\n");
889 #endif
890 }
891
qm_mc_start(struct qm_portal * portal)892 static inline union qm_mc_command *qm_mc_start(struct qm_portal *portal)
893 {
894 struct qm_mc *mc = &portal->mc;
895
896 DPAA_ASSERT(mc->state == qman_mc_idle);
897 #ifdef CONFIG_FSL_DPAA_CHECKING
898 mc->state = qman_mc_user;
899 #endif
900 dpaa_zero(mc->cr);
901 return mc->cr;
902 }
903
qm_mc_commit(struct qm_portal * portal,u8 myverb)904 static inline void qm_mc_commit(struct qm_portal *portal, u8 myverb)
905 {
906 struct qm_mc *mc = &portal->mc;
907 union qm_mc_result *rr = mc->rr + mc->rridx;
908
909 DPAA_ASSERT(mc->state == qman_mc_user);
910 dma_wmb();
911 mc->cr->_ncw_verb = myverb | mc->vbit;
912 dpaa_flush(mc->cr);
913 dpaa_invalidate_touch_ro(rr);
914 #ifdef CONFIG_FSL_DPAA_CHECKING
915 mc->state = qman_mc_hw;
916 #endif
917 }
918
qm_mc_result(struct qm_portal * portal)919 static inline union qm_mc_result *qm_mc_result(struct qm_portal *portal)
920 {
921 struct qm_mc *mc = &portal->mc;
922 union qm_mc_result *rr = mc->rr + mc->rridx;
923
924 DPAA_ASSERT(mc->state == qman_mc_hw);
925 /*
926 * The inactive response register's verb byte always returns zero until
927 * its command is submitted and completed. This includes the valid-bit,
928 * in case you were wondering...
929 */
930 if (!rr->verb) {
931 dpaa_invalidate_touch_ro(rr);
932 return NULL;
933 }
934 mc->rridx ^= 1;
935 mc->vbit ^= QM_MCC_VERB_VBIT;
936 #ifdef CONFIG_FSL_DPAA_CHECKING
937 mc->state = qman_mc_idle;
938 #endif
939 return rr;
940 }
941
qm_mc_result_timeout(struct qm_portal * portal,union qm_mc_result ** mcr)942 static inline int qm_mc_result_timeout(struct qm_portal *portal,
943 union qm_mc_result **mcr)
944 {
945 int timeout = QM_MCR_TIMEOUT;
946
947 do {
948 *mcr = qm_mc_result(portal);
949 if (*mcr)
950 break;
951 udelay(1);
952 } while (--timeout);
953
954 return timeout;
955 }
956
fq_set(struct qman_fq * fq,u32 mask)957 static inline void fq_set(struct qman_fq *fq, u32 mask)
958 {
959 fq->flags |= mask;
960 }
961
fq_clear(struct qman_fq * fq,u32 mask)962 static inline void fq_clear(struct qman_fq *fq, u32 mask)
963 {
964 fq->flags &= ~mask;
965 }
966
fq_isset(struct qman_fq * fq,u32 mask)967 static inline int fq_isset(struct qman_fq *fq, u32 mask)
968 {
969 return fq->flags & mask;
970 }
971
fq_isclear(struct qman_fq * fq,u32 mask)972 static inline int fq_isclear(struct qman_fq *fq, u32 mask)
973 {
974 return !(fq->flags & mask);
975 }
976
977 struct qman_portal {
978 struct qm_portal p;
979 /* PORTAL_BITS_*** - dynamic, strictly internal */
980 unsigned long bits;
981 /* interrupt sources processed by portal_isr(), configurable */
982 unsigned long irq_sources;
983 u32 use_eqcr_ci_stashing;
984 /* only 1 volatile dequeue at a time */
985 struct qman_fq *vdqcr_owned;
986 u32 sdqcr;
987 /* probing time config params for cpu-affine portals */
988 const struct qm_portal_config *config;
989 /* 2-element array. cgrs[0] is mask, cgrs[1] is snapshot. */
990 struct qman_cgrs *cgrs;
991 /* linked-list of CSCN handlers. */
992 struct list_head cgr_cbs;
993 /* list lock */
994 spinlock_t cgr_lock;
995 struct work_struct congestion_work;
996 struct work_struct mr_work;
997 char irqname[MAX_IRQNAME];
998 };
999
1000 static cpumask_t affine_mask;
1001 static DEFINE_SPINLOCK(affine_mask_lock);
1002 static u16 affine_channels[NR_CPUS];
1003 static DEFINE_PER_CPU(struct qman_portal, qman_affine_portal);
1004 struct qman_portal *affine_portals[NR_CPUS];
1005
get_affine_portal(void)1006 static inline struct qman_portal *get_affine_portal(void)
1007 {
1008 return &get_cpu_var(qman_affine_portal);
1009 }
1010
put_affine_portal(void)1011 static inline void put_affine_portal(void)
1012 {
1013 put_cpu_var(qman_affine_portal);
1014 }
1015
1016
get_portal_for_channel(u16 channel)1017 static inline struct qman_portal *get_portal_for_channel(u16 channel)
1018 {
1019 int i;
1020
1021 for (i = 0; i < num_possible_cpus(); i++) {
1022 if (affine_portals[i] &&
1023 affine_portals[i]->config->channel == channel)
1024 return affine_portals[i];
1025 }
1026
1027 return NULL;
1028 }
1029
1030 static struct workqueue_struct *qm_portal_wq;
1031
qman_dqrr_set_ithresh(struct qman_portal * portal,u8 ithresh)1032 int qman_dqrr_set_ithresh(struct qman_portal *portal, u8 ithresh)
1033 {
1034 int res;
1035
1036 if (!portal)
1037 return -EINVAL;
1038
1039 res = qm_dqrr_set_ithresh(&portal->p, ithresh);
1040 if (res)
1041 return res;
1042
1043 portal->p.dqrr.ithresh = ithresh;
1044
1045 return 0;
1046 }
1047 EXPORT_SYMBOL(qman_dqrr_set_ithresh);
1048
qman_dqrr_get_ithresh(struct qman_portal * portal,u8 * ithresh)1049 void qman_dqrr_get_ithresh(struct qman_portal *portal, u8 *ithresh)
1050 {
1051 if (portal && ithresh)
1052 *ithresh = qm_in(&portal->p, QM_REG_DQRR_ITR);
1053 }
1054 EXPORT_SYMBOL(qman_dqrr_get_ithresh);
1055
qman_portal_get_iperiod(struct qman_portal * portal,u32 * iperiod)1056 void qman_portal_get_iperiod(struct qman_portal *portal, u32 *iperiod)
1057 {
1058 if (portal && iperiod)
1059 *iperiod = qm_in(&portal->p, QM_REG_ITPR);
1060 }
1061 EXPORT_SYMBOL(qman_portal_get_iperiod);
1062
qman_portal_set_iperiod(struct qman_portal * portal,u32 iperiod)1063 int qman_portal_set_iperiod(struct qman_portal *portal, u32 iperiod)
1064 {
1065 if (!portal || iperiod > QMAN_ITP_MAX)
1066 return -EINVAL;
1067
1068 qm_out(&portal->p, QM_REG_ITPR, iperiod);
1069
1070 return 0;
1071 }
1072 EXPORT_SYMBOL(qman_portal_set_iperiod);
1073
qman_wq_alloc(void)1074 int qman_wq_alloc(void)
1075 {
1076 qm_portal_wq = alloc_workqueue("qman_portal_wq", 0, 1);
1077 if (!qm_portal_wq)
1078 return -ENOMEM;
1079 return 0;
1080 }
1081
1082
qman_enable_irqs(void)1083 void qman_enable_irqs(void)
1084 {
1085 int i;
1086
1087 for (i = 0; i < num_possible_cpus(); i++) {
1088 if (affine_portals[i]) {
1089 qm_out(&affine_portals[i]->p, QM_REG_ISR, 0xffffffff);
1090 qm_out(&affine_portals[i]->p, QM_REG_IIR, 0);
1091 }
1092
1093 }
1094 }
1095
1096 /*
1097 * This is what everything can wait on, even if it migrates to a different cpu
1098 * to the one whose affine portal it is waiting on.
1099 */
1100 static DECLARE_WAIT_QUEUE_HEAD(affine_queue);
1101
1102 static struct qman_fq **fq_table;
1103 static u32 num_fqids;
1104
qman_alloc_fq_table(u32 _num_fqids)1105 int qman_alloc_fq_table(u32 _num_fqids)
1106 {
1107 num_fqids = _num_fqids;
1108
1109 fq_table = vzalloc(array3_size(sizeof(struct qman_fq *),
1110 num_fqids, 2));
1111 if (!fq_table)
1112 return -ENOMEM;
1113
1114 pr_debug("Allocated fq lookup table at %p, entry count %u\n",
1115 fq_table, num_fqids * 2);
1116 return 0;
1117 }
1118
idx_to_fq(u32 idx)1119 static struct qman_fq *idx_to_fq(u32 idx)
1120 {
1121 struct qman_fq *fq;
1122
1123 #ifdef CONFIG_FSL_DPAA_CHECKING
1124 if (WARN_ON(idx >= num_fqids * 2))
1125 return NULL;
1126 #endif
1127 fq = fq_table[idx];
1128 DPAA_ASSERT(!fq || idx == fq->idx);
1129
1130 return fq;
1131 }
1132
1133 /*
1134 * Only returns full-service fq objects, not enqueue-only
1135 * references (QMAN_FQ_FLAG_NO_MODIFY).
1136 */
fqid_to_fq(u32 fqid)1137 static struct qman_fq *fqid_to_fq(u32 fqid)
1138 {
1139 return idx_to_fq(fqid * 2);
1140 }
1141
tag_to_fq(u32 tag)1142 static struct qman_fq *tag_to_fq(u32 tag)
1143 {
1144 #if BITS_PER_LONG == 64
1145 return idx_to_fq(tag);
1146 #else
1147 return (struct qman_fq *)tag;
1148 #endif
1149 }
1150
fq_to_tag(struct qman_fq * fq)1151 static u32 fq_to_tag(struct qman_fq *fq)
1152 {
1153 #if BITS_PER_LONG == 64
1154 return fq->idx;
1155 #else
1156 return (u32)fq;
1157 #endif
1158 }
1159
1160 static u32 __poll_portal_slow(struct qman_portal *p, u32 is);
1161 static inline unsigned int __poll_portal_fast(struct qman_portal *p,
1162 unsigned int poll_limit);
1163 static void qm_congestion_task(struct work_struct *work);
1164 static void qm_mr_process_task(struct work_struct *work);
1165
portal_isr(int irq,void * ptr)1166 static irqreturn_t portal_isr(int irq, void *ptr)
1167 {
1168 struct qman_portal *p = ptr;
1169 u32 is = qm_in(&p->p, QM_REG_ISR) & p->irq_sources;
1170 u32 clear = 0;
1171
1172 if (unlikely(!is))
1173 return IRQ_NONE;
1174
1175 /* DQRR-handling if it's interrupt-driven */
1176 if (is & QM_PIRQ_DQRI) {
1177 __poll_portal_fast(p, QMAN_POLL_LIMIT);
1178 clear = QM_DQAVAIL_MASK | QM_PIRQ_DQRI;
1179 }
1180 /* Handling of anything else that's interrupt-driven */
1181 clear |= __poll_portal_slow(p, is) & QM_PIRQ_SLOW;
1182 qm_out(&p->p, QM_REG_ISR, clear);
1183 return IRQ_HANDLED;
1184 }
1185
drain_mr_fqrni(struct qm_portal * p)1186 static int drain_mr_fqrni(struct qm_portal *p)
1187 {
1188 const union qm_mr_entry *msg;
1189 loop:
1190 qm_mr_pvb_update(p);
1191 msg = qm_mr_current(p);
1192 if (!msg) {
1193 /*
1194 * if MR was full and h/w had other FQRNI entries to produce, we
1195 * need to allow it time to produce those entries once the
1196 * existing entries are consumed. A worst-case situation
1197 * (fully-loaded system) means h/w sequencers may have to do 3-4
1198 * other things before servicing the portal's MR pump, each of
1199 * which (if slow) may take ~50 qman cycles (which is ~200
1200 * processor cycles). So rounding up and then multiplying this
1201 * worst-case estimate by a factor of 10, just to be
1202 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
1203 * one entry at a time, so h/w has an opportunity to produce new
1204 * entries well before the ring has been fully consumed, so
1205 * we're being *really* paranoid here.
1206 */
1207 mdelay(1);
1208 qm_mr_pvb_update(p);
1209 msg = qm_mr_current(p);
1210 if (!msg)
1211 return 0;
1212 }
1213 if ((msg->verb & QM_MR_VERB_TYPE_MASK) != QM_MR_VERB_FQRNI) {
1214 /* We aren't draining anything but FQRNIs */
1215 pr_err("Found verb 0x%x in MR\n", msg->verb);
1216 return -1;
1217 }
1218 qm_mr_next(p);
1219 qm_mr_cci_consume(p, 1);
1220 goto loop;
1221 }
1222
qman_create_portal(struct qman_portal * portal,const struct qm_portal_config * c,const struct qman_cgrs * cgrs)1223 static int qman_create_portal(struct qman_portal *portal,
1224 const struct qm_portal_config *c,
1225 const struct qman_cgrs *cgrs)
1226 {
1227 struct qm_portal *p;
1228 int ret;
1229 u32 isdr;
1230
1231 p = &portal->p;
1232
1233 #ifdef CONFIG_FSL_PAMU
1234 /* PAMU is required for stashing */
1235 portal->use_eqcr_ci_stashing = ((qman_ip_rev >= QMAN_REV30) ? 1 : 0);
1236 #else
1237 portal->use_eqcr_ci_stashing = 0;
1238 #endif
1239 /*
1240 * prep the low-level portal struct with the mapped addresses from the
1241 * config, everything that follows depends on it and "config" is more
1242 * for (de)reference
1243 */
1244 p->addr.ce = c->addr_virt_ce;
1245 p->addr.ce_be = c->addr_virt_ce;
1246 p->addr.ci = c->addr_virt_ci;
1247 /*
1248 * If CI-stashing is used, the current defaults use a threshold of 3,
1249 * and stash with high-than-DQRR priority.
1250 */
1251 if (qm_eqcr_init(p, qm_eqcr_pvb,
1252 portal->use_eqcr_ci_stashing ? 3 : 0, 1)) {
1253 dev_err(c->dev, "EQCR initialisation failed\n");
1254 goto fail_eqcr;
1255 }
1256 if (qm_dqrr_init(p, c, qm_dqrr_dpush, qm_dqrr_pvb,
1257 qm_dqrr_cdc, DQRR_MAXFILL)) {
1258 dev_err(c->dev, "DQRR initialisation failed\n");
1259 goto fail_dqrr;
1260 }
1261 if (qm_mr_init(p, qm_mr_pvb, qm_mr_cci)) {
1262 dev_err(c->dev, "MR initialisation failed\n");
1263 goto fail_mr;
1264 }
1265 if (qm_mc_init(p)) {
1266 dev_err(c->dev, "MC initialisation failed\n");
1267 goto fail_mc;
1268 }
1269 /* static interrupt-gating controls */
1270 qm_dqrr_set_ithresh(p, QMAN_PIRQ_DQRR_ITHRESH);
1271 qm_mr_set_ithresh(p, QMAN_PIRQ_MR_ITHRESH);
1272 qm_out(p, QM_REG_ITPR, QMAN_PIRQ_IPERIOD);
1273 portal->cgrs = kmalloc_array(2, sizeof(*cgrs), GFP_KERNEL);
1274 if (!portal->cgrs)
1275 goto fail_cgrs;
1276 /* initial snapshot is no-depletion */
1277 qman_cgrs_init(&portal->cgrs[1]);
1278 if (cgrs)
1279 portal->cgrs[0] = *cgrs;
1280 else
1281 /* if the given mask is NULL, assume all CGRs can be seen */
1282 qman_cgrs_fill(&portal->cgrs[0]);
1283 INIT_LIST_HEAD(&portal->cgr_cbs);
1284 spin_lock_init(&portal->cgr_lock);
1285 INIT_WORK(&portal->congestion_work, qm_congestion_task);
1286 INIT_WORK(&portal->mr_work, qm_mr_process_task);
1287 portal->bits = 0;
1288 portal->sdqcr = QM_SDQCR_SOURCE_CHANNELS | QM_SDQCR_COUNT_UPTO3 |
1289 QM_SDQCR_DEDICATED_PRECEDENCE | QM_SDQCR_TYPE_PRIO_QOS |
1290 QM_SDQCR_TOKEN_SET(0xab) | QM_SDQCR_CHANNELS_DEDICATED;
1291 isdr = 0xffffffff;
1292 qm_out(p, QM_REG_ISDR, isdr);
1293 portal->irq_sources = 0;
1294 qm_out(p, QM_REG_IER, 0);
1295 snprintf(portal->irqname, MAX_IRQNAME, IRQNAME, c->cpu);
1296 qm_out(p, QM_REG_IIR, 1);
1297 if (request_irq(c->irq, portal_isr, 0, portal->irqname, portal)) {
1298 dev_err(c->dev, "request_irq() failed\n");
1299 goto fail_irq;
1300 }
1301
1302 if (dpaa_set_portal_irq_affinity(c->dev, c->irq, c->cpu))
1303 goto fail_affinity;
1304
1305 /* Need EQCR to be empty before continuing */
1306 isdr &= ~QM_PIRQ_EQCI;
1307 qm_out(p, QM_REG_ISDR, isdr);
1308 ret = qm_eqcr_get_fill(p);
1309 if (ret) {
1310 dev_err(c->dev, "EQCR unclean\n");
1311 goto fail_eqcr_empty;
1312 }
1313 isdr &= ~(QM_PIRQ_DQRI | QM_PIRQ_MRI);
1314 qm_out(p, QM_REG_ISDR, isdr);
1315 if (qm_dqrr_current(p)) {
1316 dev_dbg(c->dev, "DQRR unclean\n");
1317 qm_dqrr_cdc_consume_n(p, 0xffff);
1318 }
1319 if (qm_mr_current(p) && drain_mr_fqrni(p)) {
1320 /* special handling, drain just in case it's a few FQRNIs */
1321 const union qm_mr_entry *e = qm_mr_current(p);
1322
1323 dev_err(c->dev, "MR dirty, VB 0x%x, rc 0x%x, addr 0x%llx\n",
1324 e->verb, e->ern.rc, qm_fd_addr_get64(&e->ern.fd));
1325 goto fail_dqrr_mr_empty;
1326 }
1327 /* Success */
1328 portal->config = c;
1329 qm_out(p, QM_REG_ISR, 0xffffffff);
1330 qm_out(p, QM_REG_ISDR, 0);
1331 if (!qman_requires_cleanup())
1332 qm_out(p, QM_REG_IIR, 0);
1333 /* Write a sane SDQCR */
1334 qm_dqrr_sdqcr_set(p, portal->sdqcr);
1335 return 0;
1336
1337 fail_dqrr_mr_empty:
1338 fail_eqcr_empty:
1339 fail_affinity:
1340 free_irq(c->irq, portal);
1341 fail_irq:
1342 kfree(portal->cgrs);
1343 fail_cgrs:
1344 qm_mc_finish(p);
1345 fail_mc:
1346 qm_mr_finish(p);
1347 fail_mr:
1348 qm_dqrr_finish(p);
1349 fail_dqrr:
1350 qm_eqcr_finish(p);
1351 fail_eqcr:
1352 return -EIO;
1353 }
1354
qman_create_affine_portal(const struct qm_portal_config * c,const struct qman_cgrs * cgrs)1355 struct qman_portal *qman_create_affine_portal(const struct qm_portal_config *c,
1356 const struct qman_cgrs *cgrs)
1357 {
1358 struct qman_portal *portal;
1359 int err;
1360
1361 portal = &per_cpu(qman_affine_portal, c->cpu);
1362 err = qman_create_portal(portal, c, cgrs);
1363 if (err)
1364 return NULL;
1365
1366 spin_lock(&affine_mask_lock);
1367 cpumask_set_cpu(c->cpu, &affine_mask);
1368 affine_channels[c->cpu] = c->channel;
1369 affine_portals[c->cpu] = portal;
1370 spin_unlock(&affine_mask_lock);
1371
1372 return portal;
1373 }
1374
qman_destroy_portal(struct qman_portal * qm)1375 static void qman_destroy_portal(struct qman_portal *qm)
1376 {
1377 const struct qm_portal_config *pcfg;
1378
1379 /* Stop dequeues on the portal */
1380 qm_dqrr_sdqcr_set(&qm->p, 0);
1381
1382 /*
1383 * NB we do this to "quiesce" EQCR. If we add enqueue-completions or
1384 * something related to QM_PIRQ_EQCI, this may need fixing.
1385 * Also, due to the prefetching model used for CI updates in the enqueue
1386 * path, this update will only invalidate the CI cacheline *after*
1387 * working on it, so we need to call this twice to ensure a full update
1388 * irrespective of where the enqueue processing was at when the teardown
1389 * began.
1390 */
1391 qm_eqcr_cce_update(&qm->p);
1392 qm_eqcr_cce_update(&qm->p);
1393 pcfg = qm->config;
1394
1395 free_irq(pcfg->irq, qm);
1396
1397 kfree(qm->cgrs);
1398 qm_mc_finish(&qm->p);
1399 qm_mr_finish(&qm->p);
1400 qm_dqrr_finish(&qm->p);
1401 qm_eqcr_finish(&qm->p);
1402
1403 qm->config = NULL;
1404 }
1405
qman_destroy_affine_portal(void)1406 const struct qm_portal_config *qman_destroy_affine_portal(void)
1407 {
1408 struct qman_portal *qm = get_affine_portal();
1409 const struct qm_portal_config *pcfg;
1410 int cpu;
1411
1412 pcfg = qm->config;
1413 cpu = pcfg->cpu;
1414
1415 qman_destroy_portal(qm);
1416
1417 spin_lock(&affine_mask_lock);
1418 cpumask_clear_cpu(cpu, &affine_mask);
1419 spin_unlock(&affine_mask_lock);
1420 put_affine_portal();
1421 return pcfg;
1422 }
1423
1424 /* Inline helper to reduce nesting in __poll_portal_slow() */
fq_state_change(struct qman_portal * p,struct qman_fq * fq,const union qm_mr_entry * msg,u8 verb)1425 static inline void fq_state_change(struct qman_portal *p, struct qman_fq *fq,
1426 const union qm_mr_entry *msg, u8 verb)
1427 {
1428 switch (verb) {
1429 case QM_MR_VERB_FQRL:
1430 DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_ORL));
1431 fq_clear(fq, QMAN_FQ_STATE_ORL);
1432 break;
1433 case QM_MR_VERB_FQRN:
1434 DPAA_ASSERT(fq->state == qman_fq_state_parked ||
1435 fq->state == qman_fq_state_sched);
1436 DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_CHANGING));
1437 fq_clear(fq, QMAN_FQ_STATE_CHANGING);
1438 if (msg->fq.fqs & QM_MR_FQS_NOTEMPTY)
1439 fq_set(fq, QMAN_FQ_STATE_NE);
1440 if (msg->fq.fqs & QM_MR_FQS_ORLPRESENT)
1441 fq_set(fq, QMAN_FQ_STATE_ORL);
1442 fq->state = qman_fq_state_retired;
1443 break;
1444 case QM_MR_VERB_FQPN:
1445 DPAA_ASSERT(fq->state == qman_fq_state_sched);
1446 DPAA_ASSERT(fq_isclear(fq, QMAN_FQ_STATE_CHANGING));
1447 fq->state = qman_fq_state_parked;
1448 }
1449 }
1450
qm_congestion_task(struct work_struct * work)1451 static void qm_congestion_task(struct work_struct *work)
1452 {
1453 struct qman_portal *p = container_of(work, struct qman_portal,
1454 congestion_work);
1455 struct qman_cgrs rr, c;
1456 union qm_mc_result *mcr;
1457 struct qman_cgr *cgr;
1458
1459 spin_lock(&p->cgr_lock);
1460 qm_mc_start(&p->p);
1461 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCONGESTION);
1462 if (!qm_mc_result_timeout(&p->p, &mcr)) {
1463 spin_unlock(&p->cgr_lock);
1464 dev_crit(p->config->dev, "QUERYCONGESTION timeout\n");
1465 qman_p_irqsource_add(p, QM_PIRQ_CSCI);
1466 return;
1467 }
1468 /* mask out the ones I'm not interested in */
1469 qman_cgrs_and(&rr, (struct qman_cgrs *)&mcr->querycongestion.state,
1470 &p->cgrs[0]);
1471 /* check previous snapshot for delta, enter/exit congestion */
1472 qman_cgrs_xor(&c, &rr, &p->cgrs[1]);
1473 /* update snapshot */
1474 qman_cgrs_cp(&p->cgrs[1], &rr);
1475 /* Invoke callback */
1476 list_for_each_entry(cgr, &p->cgr_cbs, node)
1477 if (cgr->cb && qman_cgrs_get(&c, cgr->cgrid))
1478 cgr->cb(p, cgr, qman_cgrs_get(&rr, cgr->cgrid));
1479 spin_unlock(&p->cgr_lock);
1480 qman_p_irqsource_add(p, QM_PIRQ_CSCI);
1481 }
1482
qm_mr_process_task(struct work_struct * work)1483 static void qm_mr_process_task(struct work_struct *work)
1484 {
1485 struct qman_portal *p = container_of(work, struct qman_portal,
1486 mr_work);
1487 const union qm_mr_entry *msg;
1488 struct qman_fq *fq;
1489 u8 verb, num = 0;
1490
1491 preempt_disable();
1492
1493 while (1) {
1494 qm_mr_pvb_update(&p->p);
1495 msg = qm_mr_current(&p->p);
1496 if (!msg)
1497 break;
1498
1499 verb = msg->verb & QM_MR_VERB_TYPE_MASK;
1500 /* The message is a software ERN iff the 0x20 bit is clear */
1501 if (verb & 0x20) {
1502 switch (verb) {
1503 case QM_MR_VERB_FQRNI:
1504 /* nada, we drop FQRNIs on the floor */
1505 break;
1506 case QM_MR_VERB_FQRN:
1507 case QM_MR_VERB_FQRL:
1508 /* Lookup in the retirement table */
1509 fq = fqid_to_fq(qm_fqid_get(&msg->fq));
1510 if (WARN_ON(!fq))
1511 break;
1512 fq_state_change(p, fq, msg, verb);
1513 if (fq->cb.fqs)
1514 fq->cb.fqs(p, fq, msg);
1515 break;
1516 case QM_MR_VERB_FQPN:
1517 /* Parked */
1518 fq = tag_to_fq(be32_to_cpu(msg->fq.context_b));
1519 fq_state_change(p, fq, msg, verb);
1520 if (fq->cb.fqs)
1521 fq->cb.fqs(p, fq, msg);
1522 break;
1523 case QM_MR_VERB_DC_ERN:
1524 /* DCP ERN */
1525 pr_crit_once("Leaking DCP ERNs!\n");
1526 break;
1527 default:
1528 pr_crit("Invalid MR verb 0x%02x\n", verb);
1529 }
1530 } else {
1531 /* Its a software ERN */
1532 fq = tag_to_fq(be32_to_cpu(msg->ern.tag));
1533 fq->cb.ern(p, fq, msg);
1534 }
1535 num++;
1536 qm_mr_next(&p->p);
1537 }
1538
1539 qm_mr_cci_consume(&p->p, num);
1540 qman_p_irqsource_add(p, QM_PIRQ_MRI);
1541 preempt_enable();
1542 }
1543
__poll_portal_slow(struct qman_portal * p,u32 is)1544 static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
1545 {
1546 if (is & QM_PIRQ_CSCI) {
1547 qman_p_irqsource_remove(p, QM_PIRQ_CSCI);
1548 queue_work_on(smp_processor_id(), qm_portal_wq,
1549 &p->congestion_work);
1550 }
1551
1552 if (is & QM_PIRQ_EQRI) {
1553 qm_eqcr_cce_update(&p->p);
1554 qm_eqcr_set_ithresh(&p->p, 0);
1555 wake_up(&affine_queue);
1556 }
1557
1558 if (is & QM_PIRQ_MRI) {
1559 qman_p_irqsource_remove(p, QM_PIRQ_MRI);
1560 queue_work_on(smp_processor_id(), qm_portal_wq,
1561 &p->mr_work);
1562 }
1563
1564 return is;
1565 }
1566
1567 /*
1568 * remove some slowish-path stuff from the "fast path" and make sure it isn't
1569 * inlined.
1570 */
clear_vdqcr(struct qman_portal * p,struct qman_fq * fq)1571 static noinline void clear_vdqcr(struct qman_portal *p, struct qman_fq *fq)
1572 {
1573 p->vdqcr_owned = NULL;
1574 fq_clear(fq, QMAN_FQ_STATE_VDQCR);
1575 wake_up(&affine_queue);
1576 }
1577
1578 /*
1579 * The only states that would conflict with other things if they ran at the
1580 * same time on the same cpu are:
1581 *
1582 * (i) setting/clearing vdqcr_owned, and
1583 * (ii) clearing the NE (Not Empty) flag.
1584 *
1585 * Both are safe. Because;
1586 *
1587 * (i) this clearing can only occur after qman_volatile_dequeue() has set the
1588 * vdqcr_owned field (which it does before setting VDQCR), and
1589 * qman_volatile_dequeue() blocks interrupts and preemption while this is
1590 * done so that we can't interfere.
1591 * (ii) the NE flag is only cleared after qman_retire_fq() has set it, and as
1592 * with (i) that API prevents us from interfering until it's safe.
1593 *
1594 * The good thing is that qman_volatile_dequeue() and qman_retire_fq() run far
1595 * less frequently (ie. per-FQ) than __poll_portal_fast() does, so the nett
1596 * advantage comes from this function not having to "lock" anything at all.
1597 *
1598 * Note also that the callbacks are invoked at points which are safe against the
1599 * above potential conflicts, but that this function itself is not re-entrant
1600 * (this is because the function tracks one end of each FIFO in the portal and
1601 * we do *not* want to lock that). So the consequence is that it is safe for
1602 * user callbacks to call into any QMan API.
1603 */
__poll_portal_fast(struct qman_portal * p,unsigned int poll_limit)1604 static inline unsigned int __poll_portal_fast(struct qman_portal *p,
1605 unsigned int poll_limit)
1606 {
1607 const struct qm_dqrr_entry *dq;
1608 struct qman_fq *fq;
1609 enum qman_cb_dqrr_result res;
1610 unsigned int limit = 0;
1611
1612 do {
1613 qm_dqrr_pvb_update(&p->p);
1614 dq = qm_dqrr_current(&p->p);
1615 if (!dq)
1616 break;
1617
1618 if (dq->stat & QM_DQRR_STAT_UNSCHEDULED) {
1619 /*
1620 * VDQCR: don't trust context_b as the FQ may have
1621 * been configured for h/w consumption and we're
1622 * draining it post-retirement.
1623 */
1624 fq = p->vdqcr_owned;
1625 /*
1626 * We only set QMAN_FQ_STATE_NE when retiring, so we
1627 * only need to check for clearing it when doing
1628 * volatile dequeues. It's one less thing to check
1629 * in the critical path (SDQCR).
1630 */
1631 if (dq->stat & QM_DQRR_STAT_FQ_EMPTY)
1632 fq_clear(fq, QMAN_FQ_STATE_NE);
1633 /*
1634 * This is duplicated from the SDQCR code, but we
1635 * have stuff to do before *and* after this callback,
1636 * and we don't want multiple if()s in the critical
1637 * path (SDQCR).
1638 */
1639 res = fq->cb.dqrr(p, fq, dq);
1640 if (res == qman_cb_dqrr_stop)
1641 break;
1642 /* Check for VDQCR completion */
1643 if (dq->stat & QM_DQRR_STAT_DQCR_EXPIRED)
1644 clear_vdqcr(p, fq);
1645 } else {
1646 /* SDQCR: context_b points to the FQ */
1647 fq = tag_to_fq(be32_to_cpu(dq->context_b));
1648 /* Now let the callback do its stuff */
1649 res = fq->cb.dqrr(p, fq, dq);
1650 /*
1651 * The callback can request that we exit without
1652 * consuming this entry nor advancing;
1653 */
1654 if (res == qman_cb_dqrr_stop)
1655 break;
1656 }
1657 /* Interpret 'dq' from a driver perspective. */
1658 /*
1659 * Parking isn't possible unless HELDACTIVE was set. NB,
1660 * FORCEELIGIBLE implies HELDACTIVE, so we only need to
1661 * check for HELDACTIVE to cover both.
1662 */
1663 DPAA_ASSERT((dq->stat & QM_DQRR_STAT_FQ_HELDACTIVE) ||
1664 (res != qman_cb_dqrr_park));
1665 /* just means "skip it, I'll consume it myself later on" */
1666 if (res != qman_cb_dqrr_defer)
1667 qm_dqrr_cdc_consume_1ptr(&p->p, dq,
1668 res == qman_cb_dqrr_park);
1669 /* Move forward */
1670 qm_dqrr_next(&p->p);
1671 /*
1672 * Entry processed and consumed, increment our counter. The
1673 * callback can request that we exit after consuming the
1674 * entry, and we also exit if we reach our processing limit,
1675 * so loop back only if neither of these conditions is met.
1676 */
1677 } while (++limit < poll_limit && res != qman_cb_dqrr_consume_stop);
1678
1679 return limit;
1680 }
1681
qman_p_irqsource_add(struct qman_portal * p,u32 bits)1682 void qman_p_irqsource_add(struct qman_portal *p, u32 bits)
1683 {
1684 unsigned long irqflags;
1685
1686 local_irq_save(irqflags);
1687 p->irq_sources |= bits & QM_PIRQ_VISIBLE;
1688 qm_out(&p->p, QM_REG_IER, p->irq_sources);
1689 local_irq_restore(irqflags);
1690 }
1691 EXPORT_SYMBOL(qman_p_irqsource_add);
1692
qman_p_irqsource_remove(struct qman_portal * p,u32 bits)1693 void qman_p_irqsource_remove(struct qman_portal *p, u32 bits)
1694 {
1695 unsigned long irqflags;
1696 u32 ier;
1697
1698 /*
1699 * Our interrupt handler only processes+clears status register bits that
1700 * are in p->irq_sources. As we're trimming that mask, if one of them
1701 * were to assert in the status register just before we remove it from
1702 * the enable register, there would be an interrupt-storm when we
1703 * release the IRQ lock. So we wait for the enable register update to
1704 * take effect in h/w (by reading it back) and then clear all other bits
1705 * in the status register. Ie. we clear them from ISR once it's certain
1706 * IER won't allow them to reassert.
1707 */
1708 local_irq_save(irqflags);
1709 bits &= QM_PIRQ_VISIBLE;
1710 p->irq_sources &= ~bits;
1711 qm_out(&p->p, QM_REG_IER, p->irq_sources);
1712 ier = qm_in(&p->p, QM_REG_IER);
1713 /*
1714 * Using "~ier" (rather than "bits" or "~p->irq_sources") creates a
1715 * data-dependency, ie. to protect against re-ordering.
1716 */
1717 qm_out(&p->p, QM_REG_ISR, ~ier);
1718 local_irq_restore(irqflags);
1719 }
1720 EXPORT_SYMBOL(qman_p_irqsource_remove);
1721
qman_affine_cpus(void)1722 const cpumask_t *qman_affine_cpus(void)
1723 {
1724 return &affine_mask;
1725 }
1726 EXPORT_SYMBOL(qman_affine_cpus);
1727
qman_affine_channel(int cpu)1728 u16 qman_affine_channel(int cpu)
1729 {
1730 if (cpu < 0) {
1731 struct qman_portal *portal = get_affine_portal();
1732
1733 cpu = portal->config->cpu;
1734 put_affine_portal();
1735 }
1736 WARN_ON(!cpumask_test_cpu(cpu, &affine_mask));
1737 return affine_channels[cpu];
1738 }
1739 EXPORT_SYMBOL(qman_affine_channel);
1740
qman_get_affine_portal(int cpu)1741 struct qman_portal *qman_get_affine_portal(int cpu)
1742 {
1743 return affine_portals[cpu];
1744 }
1745 EXPORT_SYMBOL(qman_get_affine_portal);
1746
qman_start_using_portal(struct qman_portal * p,struct device * dev)1747 int qman_start_using_portal(struct qman_portal *p, struct device *dev)
1748 {
1749 return (!device_link_add(dev, p->config->dev,
1750 DL_FLAG_AUTOREMOVE_CONSUMER)) ? -EINVAL : 0;
1751 }
1752 EXPORT_SYMBOL(qman_start_using_portal);
1753
qman_p_poll_dqrr(struct qman_portal * p,unsigned int limit)1754 int qman_p_poll_dqrr(struct qman_portal *p, unsigned int limit)
1755 {
1756 return __poll_portal_fast(p, limit);
1757 }
1758 EXPORT_SYMBOL(qman_p_poll_dqrr);
1759
qman_p_static_dequeue_add(struct qman_portal * p,u32 pools)1760 void qman_p_static_dequeue_add(struct qman_portal *p, u32 pools)
1761 {
1762 unsigned long irqflags;
1763
1764 local_irq_save(irqflags);
1765 pools &= p->config->pools;
1766 p->sdqcr |= pools;
1767 qm_dqrr_sdqcr_set(&p->p, p->sdqcr);
1768 local_irq_restore(irqflags);
1769 }
1770 EXPORT_SYMBOL(qman_p_static_dequeue_add);
1771
1772 /* Frame queue API */
1773
mcr_result_str(u8 result)1774 static const char *mcr_result_str(u8 result)
1775 {
1776 switch (result) {
1777 case QM_MCR_RESULT_NULL:
1778 return "QM_MCR_RESULT_NULL";
1779 case QM_MCR_RESULT_OK:
1780 return "QM_MCR_RESULT_OK";
1781 case QM_MCR_RESULT_ERR_FQID:
1782 return "QM_MCR_RESULT_ERR_FQID";
1783 case QM_MCR_RESULT_ERR_FQSTATE:
1784 return "QM_MCR_RESULT_ERR_FQSTATE";
1785 case QM_MCR_RESULT_ERR_NOTEMPTY:
1786 return "QM_MCR_RESULT_ERR_NOTEMPTY";
1787 case QM_MCR_RESULT_PENDING:
1788 return "QM_MCR_RESULT_PENDING";
1789 case QM_MCR_RESULT_ERR_BADCOMMAND:
1790 return "QM_MCR_RESULT_ERR_BADCOMMAND";
1791 }
1792 return "<unknown MCR result>";
1793 }
1794
qman_create_fq(u32 fqid,u32 flags,struct qman_fq * fq)1795 int qman_create_fq(u32 fqid, u32 flags, struct qman_fq *fq)
1796 {
1797 if (flags & QMAN_FQ_FLAG_DYNAMIC_FQID) {
1798 int ret = qman_alloc_fqid(&fqid);
1799
1800 if (ret)
1801 return ret;
1802 }
1803 fq->fqid = fqid;
1804 fq->flags = flags;
1805 fq->state = qman_fq_state_oos;
1806 fq->cgr_groupid = 0;
1807
1808 /* A context_b of 0 is allegedly special, so don't use that fqid */
1809 if (fqid == 0 || fqid >= num_fqids) {
1810 WARN(1, "bad fqid %d\n", fqid);
1811 return -EINVAL;
1812 }
1813
1814 fq->idx = fqid * 2;
1815 if (flags & QMAN_FQ_FLAG_NO_MODIFY)
1816 fq->idx++;
1817
1818 WARN_ON(fq_table[fq->idx]);
1819 fq_table[fq->idx] = fq;
1820
1821 return 0;
1822 }
1823 EXPORT_SYMBOL(qman_create_fq);
1824
qman_destroy_fq(struct qman_fq * fq)1825 void qman_destroy_fq(struct qman_fq *fq)
1826 {
1827 /*
1828 * We don't need to lock the FQ as it is a pre-condition that the FQ be
1829 * quiesced. Instead, run some checks.
1830 */
1831 switch (fq->state) {
1832 case qman_fq_state_parked:
1833 case qman_fq_state_oos:
1834 if (fq_isset(fq, QMAN_FQ_FLAG_DYNAMIC_FQID))
1835 qman_release_fqid(fq->fqid);
1836
1837 DPAA_ASSERT(fq_table[fq->idx]);
1838 fq_table[fq->idx] = NULL;
1839 return;
1840 default:
1841 break;
1842 }
1843 DPAA_ASSERT(NULL == "qman_free_fq() on unquiesced FQ!");
1844 }
1845 EXPORT_SYMBOL(qman_destroy_fq);
1846
qman_fq_fqid(struct qman_fq * fq)1847 u32 qman_fq_fqid(struct qman_fq *fq)
1848 {
1849 return fq->fqid;
1850 }
1851 EXPORT_SYMBOL(qman_fq_fqid);
1852
qman_init_fq(struct qman_fq * fq,u32 flags,struct qm_mcc_initfq * opts)1853 int qman_init_fq(struct qman_fq *fq, u32 flags, struct qm_mcc_initfq *opts)
1854 {
1855 union qm_mc_command *mcc;
1856 union qm_mc_result *mcr;
1857 struct qman_portal *p;
1858 u8 res, myverb;
1859 int ret = 0;
1860
1861 myverb = (flags & QMAN_INITFQ_FLAG_SCHED)
1862 ? QM_MCC_VERB_INITFQ_SCHED : QM_MCC_VERB_INITFQ_PARKED;
1863
1864 if (fq->state != qman_fq_state_oos &&
1865 fq->state != qman_fq_state_parked)
1866 return -EINVAL;
1867 #ifdef CONFIG_FSL_DPAA_CHECKING
1868 if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
1869 return -EINVAL;
1870 #endif
1871 if (opts && (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_OAC)) {
1872 /* And can't be set at the same time as TDTHRESH */
1873 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_TDTHRESH)
1874 return -EINVAL;
1875 }
1876 /* Issue an INITFQ_[PARKED|SCHED] management command */
1877 p = get_affine_portal();
1878 if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
1879 (fq->state != qman_fq_state_oos &&
1880 fq->state != qman_fq_state_parked)) {
1881 ret = -EBUSY;
1882 goto out;
1883 }
1884 mcc = qm_mc_start(&p->p);
1885 if (opts)
1886 mcc->initfq = *opts;
1887 qm_fqid_set(&mcc->fq, fq->fqid);
1888 mcc->initfq.count = 0;
1889 /*
1890 * If the FQ does *not* have the TO_DCPORTAL flag, context_b is set as a
1891 * demux pointer. Otherwise, the caller-provided value is allowed to
1892 * stand, don't overwrite it.
1893 */
1894 if (fq_isclear(fq, QMAN_FQ_FLAG_TO_DCPORTAL)) {
1895 dma_addr_t phys_fq;
1896
1897 mcc->initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CONTEXTB);
1898 mcc->initfq.fqd.context_b = cpu_to_be32(fq_to_tag(fq));
1899 /*
1900 * and the physical address - NB, if the user wasn't trying to
1901 * set CONTEXTA, clear the stashing settings.
1902 */
1903 if (!(be16_to_cpu(mcc->initfq.we_mask) &
1904 QM_INITFQ_WE_CONTEXTA)) {
1905 mcc->initfq.we_mask |=
1906 cpu_to_be16(QM_INITFQ_WE_CONTEXTA);
1907 memset(&mcc->initfq.fqd.context_a, 0,
1908 sizeof(mcc->initfq.fqd.context_a));
1909 } else {
1910 struct qman_portal *p = qman_dma_portal;
1911
1912 phys_fq = dma_map_single(p->config->dev, fq,
1913 sizeof(*fq), DMA_TO_DEVICE);
1914 if (dma_mapping_error(p->config->dev, phys_fq)) {
1915 dev_err(p->config->dev, "dma_mapping failed\n");
1916 ret = -EIO;
1917 goto out;
1918 }
1919
1920 qm_fqd_stashing_set64(&mcc->initfq.fqd, phys_fq);
1921 }
1922 }
1923 if (flags & QMAN_INITFQ_FLAG_LOCAL) {
1924 int wq = 0;
1925
1926 if (!(be16_to_cpu(mcc->initfq.we_mask) &
1927 QM_INITFQ_WE_DESTWQ)) {
1928 mcc->initfq.we_mask |=
1929 cpu_to_be16(QM_INITFQ_WE_DESTWQ);
1930 wq = 4;
1931 }
1932 qm_fqd_set_destwq(&mcc->initfq.fqd, p->config->channel, wq);
1933 }
1934 qm_mc_commit(&p->p, myverb);
1935 if (!qm_mc_result_timeout(&p->p, &mcr)) {
1936 dev_err(p->config->dev, "MCR timeout\n");
1937 ret = -ETIMEDOUT;
1938 goto out;
1939 }
1940
1941 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);
1942 res = mcr->result;
1943 if (res != QM_MCR_RESULT_OK) {
1944 ret = -EIO;
1945 goto out;
1946 }
1947 if (opts) {
1948 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_FQCTRL) {
1949 if (be16_to_cpu(opts->fqd.fq_ctrl) & QM_FQCTRL_CGE)
1950 fq_set(fq, QMAN_FQ_STATE_CGR_EN);
1951 else
1952 fq_clear(fq, QMAN_FQ_STATE_CGR_EN);
1953 }
1954 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_CGID)
1955 fq->cgr_groupid = opts->fqd.cgid;
1956 }
1957 fq->state = (flags & QMAN_INITFQ_FLAG_SCHED) ?
1958 qman_fq_state_sched : qman_fq_state_parked;
1959
1960 out:
1961 put_affine_portal();
1962 return ret;
1963 }
1964 EXPORT_SYMBOL(qman_init_fq);
1965
qman_schedule_fq(struct qman_fq * fq)1966 int qman_schedule_fq(struct qman_fq *fq)
1967 {
1968 union qm_mc_command *mcc;
1969 union qm_mc_result *mcr;
1970 struct qman_portal *p;
1971 int ret = 0;
1972
1973 if (fq->state != qman_fq_state_parked)
1974 return -EINVAL;
1975 #ifdef CONFIG_FSL_DPAA_CHECKING
1976 if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
1977 return -EINVAL;
1978 #endif
1979 /* Issue a ALTERFQ_SCHED management command */
1980 p = get_affine_portal();
1981 if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
1982 fq->state != qman_fq_state_parked) {
1983 ret = -EBUSY;
1984 goto out;
1985 }
1986 mcc = qm_mc_start(&p->p);
1987 qm_fqid_set(&mcc->fq, fq->fqid);
1988 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_SCHED);
1989 if (!qm_mc_result_timeout(&p->p, &mcr)) {
1990 dev_err(p->config->dev, "ALTER_SCHED timeout\n");
1991 ret = -ETIMEDOUT;
1992 goto out;
1993 }
1994
1995 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_SCHED);
1996 if (mcr->result != QM_MCR_RESULT_OK) {
1997 ret = -EIO;
1998 goto out;
1999 }
2000 fq->state = qman_fq_state_sched;
2001 out:
2002 put_affine_portal();
2003 return ret;
2004 }
2005 EXPORT_SYMBOL(qman_schedule_fq);
2006
qman_retire_fq(struct qman_fq * fq,u32 * flags)2007 int qman_retire_fq(struct qman_fq *fq, u32 *flags)
2008 {
2009 union qm_mc_command *mcc;
2010 union qm_mc_result *mcr;
2011 struct qman_portal *p;
2012 int ret;
2013 u8 res;
2014
2015 if (fq->state != qman_fq_state_parked &&
2016 fq->state != qman_fq_state_sched)
2017 return -EINVAL;
2018 #ifdef CONFIG_FSL_DPAA_CHECKING
2019 if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
2020 return -EINVAL;
2021 #endif
2022 p = get_affine_portal();
2023 if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
2024 fq->state == qman_fq_state_retired ||
2025 fq->state == qman_fq_state_oos) {
2026 ret = -EBUSY;
2027 goto out;
2028 }
2029 mcc = qm_mc_start(&p->p);
2030 qm_fqid_set(&mcc->fq, fq->fqid);
2031 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_RETIRE);
2032 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2033 dev_crit(p->config->dev, "ALTER_RETIRE timeout\n");
2034 ret = -ETIMEDOUT;
2035 goto out;
2036 }
2037
2038 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_RETIRE);
2039 res = mcr->result;
2040 /*
2041 * "Elegant" would be to treat OK/PENDING the same way; set CHANGING,
2042 * and defer the flags until FQRNI or FQRN (respectively) show up. But
2043 * "Friendly" is to process OK immediately, and not set CHANGING. We do
2044 * friendly, otherwise the caller doesn't necessarily have a fully
2045 * "retired" FQ on return even if the retirement was immediate. However
2046 * this does mean some code duplication between here and
2047 * fq_state_change().
2048 */
2049 if (res == QM_MCR_RESULT_OK) {
2050 ret = 0;
2051 /* Process 'fq' right away, we'll ignore FQRNI */
2052 if (mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY)
2053 fq_set(fq, QMAN_FQ_STATE_NE);
2054 if (mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)
2055 fq_set(fq, QMAN_FQ_STATE_ORL);
2056 if (flags)
2057 *flags = fq->flags;
2058 fq->state = qman_fq_state_retired;
2059 if (fq->cb.fqs) {
2060 /*
2061 * Another issue with supporting "immediate" retirement
2062 * is that we're forced to drop FQRNIs, because by the
2063 * time they're seen it may already be "too late" (the
2064 * fq may have been OOS'd and free()'d already). But if
2065 * the upper layer wants a callback whether it's
2066 * immediate or not, we have to fake a "MR" entry to
2067 * look like an FQRNI...
2068 */
2069 union qm_mr_entry msg;
2070
2071 msg.verb = QM_MR_VERB_FQRNI;
2072 msg.fq.fqs = mcr->alterfq.fqs;
2073 qm_fqid_set(&msg.fq, fq->fqid);
2074 msg.fq.context_b = cpu_to_be32(fq_to_tag(fq));
2075 fq->cb.fqs(p, fq, &msg);
2076 }
2077 } else if (res == QM_MCR_RESULT_PENDING) {
2078 ret = 1;
2079 fq_set(fq, QMAN_FQ_STATE_CHANGING);
2080 } else {
2081 ret = -EIO;
2082 }
2083 out:
2084 put_affine_portal();
2085 return ret;
2086 }
2087 EXPORT_SYMBOL(qman_retire_fq);
2088
qman_oos_fq(struct qman_fq * fq)2089 int qman_oos_fq(struct qman_fq *fq)
2090 {
2091 union qm_mc_command *mcc;
2092 union qm_mc_result *mcr;
2093 struct qman_portal *p;
2094 int ret = 0;
2095
2096 if (fq->state != qman_fq_state_retired)
2097 return -EINVAL;
2098 #ifdef CONFIG_FSL_DPAA_CHECKING
2099 if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
2100 return -EINVAL;
2101 #endif
2102 p = get_affine_portal();
2103 if (fq_isset(fq, QMAN_FQ_STATE_BLOCKOOS) ||
2104 fq->state != qman_fq_state_retired) {
2105 ret = -EBUSY;
2106 goto out;
2107 }
2108 mcc = qm_mc_start(&p->p);
2109 qm_fqid_set(&mcc->fq, fq->fqid);
2110 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2111 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2112 ret = -ETIMEDOUT;
2113 goto out;
2114 }
2115 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_OOS);
2116 if (mcr->result != QM_MCR_RESULT_OK) {
2117 ret = -EIO;
2118 goto out;
2119 }
2120 fq->state = qman_fq_state_oos;
2121 out:
2122 put_affine_portal();
2123 return ret;
2124 }
2125 EXPORT_SYMBOL(qman_oos_fq);
2126
qman_query_fq(struct qman_fq * fq,struct qm_fqd * fqd)2127 int qman_query_fq(struct qman_fq *fq, struct qm_fqd *fqd)
2128 {
2129 union qm_mc_command *mcc;
2130 union qm_mc_result *mcr;
2131 struct qman_portal *p = get_affine_portal();
2132 int ret = 0;
2133
2134 mcc = qm_mc_start(&p->p);
2135 qm_fqid_set(&mcc->fq, fq->fqid);
2136 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
2137 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2138 ret = -ETIMEDOUT;
2139 goto out;
2140 }
2141
2142 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
2143 if (mcr->result == QM_MCR_RESULT_OK)
2144 *fqd = mcr->queryfq.fqd;
2145 else
2146 ret = -EIO;
2147 out:
2148 put_affine_portal();
2149 return ret;
2150 }
2151
qman_query_fq_np(struct qman_fq * fq,struct qm_mcr_queryfq_np * np)2152 int qman_query_fq_np(struct qman_fq *fq, struct qm_mcr_queryfq_np *np)
2153 {
2154 union qm_mc_command *mcc;
2155 union qm_mc_result *mcr;
2156 struct qman_portal *p = get_affine_portal();
2157 int ret = 0;
2158
2159 mcc = qm_mc_start(&p->p);
2160 qm_fqid_set(&mcc->fq, fq->fqid);
2161 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
2162 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2163 ret = -ETIMEDOUT;
2164 goto out;
2165 }
2166
2167 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
2168 if (mcr->result == QM_MCR_RESULT_OK)
2169 *np = mcr->queryfq_np;
2170 else if (mcr->result == QM_MCR_RESULT_ERR_FQID)
2171 ret = -ERANGE;
2172 else
2173 ret = -EIO;
2174 out:
2175 put_affine_portal();
2176 return ret;
2177 }
2178 EXPORT_SYMBOL(qman_query_fq_np);
2179
qman_query_cgr(struct qman_cgr * cgr,struct qm_mcr_querycgr * cgrd)2180 static int qman_query_cgr(struct qman_cgr *cgr,
2181 struct qm_mcr_querycgr *cgrd)
2182 {
2183 union qm_mc_command *mcc;
2184 union qm_mc_result *mcr;
2185 struct qman_portal *p = get_affine_portal();
2186 int ret = 0;
2187
2188 mcc = qm_mc_start(&p->p);
2189 mcc->cgr.cgid = cgr->cgrid;
2190 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCGR);
2191 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2192 ret = -ETIMEDOUT;
2193 goto out;
2194 }
2195 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYCGR);
2196 if (mcr->result == QM_MCR_RESULT_OK)
2197 *cgrd = mcr->querycgr;
2198 else {
2199 dev_err(p->config->dev, "QUERY_CGR failed: %s\n",
2200 mcr_result_str(mcr->result));
2201 ret = -EIO;
2202 }
2203 out:
2204 put_affine_portal();
2205 return ret;
2206 }
2207
qman_query_cgr_congested(struct qman_cgr * cgr,bool * result)2208 int qman_query_cgr_congested(struct qman_cgr *cgr, bool *result)
2209 {
2210 struct qm_mcr_querycgr query_cgr;
2211 int err;
2212
2213 err = qman_query_cgr(cgr, &query_cgr);
2214 if (err)
2215 return err;
2216
2217 *result = !!query_cgr.cgr.cs;
2218 return 0;
2219 }
2220 EXPORT_SYMBOL(qman_query_cgr_congested);
2221
2222 /* internal function used as a wait_event() expression */
set_p_vdqcr(struct qman_portal * p,struct qman_fq * fq,u32 vdqcr)2223 static int set_p_vdqcr(struct qman_portal *p, struct qman_fq *fq, u32 vdqcr)
2224 {
2225 unsigned long irqflags;
2226 int ret = -EBUSY;
2227
2228 local_irq_save(irqflags);
2229 if (p->vdqcr_owned)
2230 goto out;
2231 if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
2232 goto out;
2233
2234 fq_set(fq, QMAN_FQ_STATE_VDQCR);
2235 p->vdqcr_owned = fq;
2236 qm_dqrr_vdqcr_set(&p->p, vdqcr);
2237 ret = 0;
2238 out:
2239 local_irq_restore(irqflags);
2240 return ret;
2241 }
2242
set_vdqcr(struct qman_portal ** p,struct qman_fq * fq,u32 vdqcr)2243 static int set_vdqcr(struct qman_portal **p, struct qman_fq *fq, u32 vdqcr)
2244 {
2245 int ret;
2246
2247 *p = get_affine_portal();
2248 ret = set_p_vdqcr(*p, fq, vdqcr);
2249 put_affine_portal();
2250 return ret;
2251 }
2252
wait_vdqcr_start(struct qman_portal ** p,struct qman_fq * fq,u32 vdqcr,u32 flags)2253 static int wait_vdqcr_start(struct qman_portal **p, struct qman_fq *fq,
2254 u32 vdqcr, u32 flags)
2255 {
2256 int ret = 0;
2257
2258 if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
2259 ret = wait_event_interruptible(affine_queue,
2260 !set_vdqcr(p, fq, vdqcr));
2261 else
2262 wait_event(affine_queue, !set_vdqcr(p, fq, vdqcr));
2263 return ret;
2264 }
2265
qman_volatile_dequeue(struct qman_fq * fq,u32 flags,u32 vdqcr)2266 int qman_volatile_dequeue(struct qman_fq *fq, u32 flags, u32 vdqcr)
2267 {
2268 struct qman_portal *p;
2269 int ret;
2270
2271 if (fq->state != qman_fq_state_parked &&
2272 fq->state != qman_fq_state_retired)
2273 return -EINVAL;
2274 if (vdqcr & QM_VDQCR_FQID_MASK)
2275 return -EINVAL;
2276 if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
2277 return -EBUSY;
2278 vdqcr = (vdqcr & ~QM_VDQCR_FQID_MASK) | fq->fqid;
2279 if (flags & QMAN_VOLATILE_FLAG_WAIT)
2280 ret = wait_vdqcr_start(&p, fq, vdqcr, flags);
2281 else
2282 ret = set_vdqcr(&p, fq, vdqcr);
2283 if (ret)
2284 return ret;
2285 /* VDQCR is set */
2286 if (flags & QMAN_VOLATILE_FLAG_FINISH) {
2287 if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
2288 /*
2289 * NB: don't propagate any error - the caller wouldn't
2290 * know whether the VDQCR was issued or not. A signal
2291 * could arrive after returning anyway, so the caller
2292 * can check signal_pending() if that's an issue.
2293 */
2294 wait_event_interruptible(affine_queue,
2295 !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
2296 else
2297 wait_event(affine_queue,
2298 !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
2299 }
2300 return 0;
2301 }
2302 EXPORT_SYMBOL(qman_volatile_dequeue);
2303
update_eqcr_ci(struct qman_portal * p,u8 avail)2304 static void update_eqcr_ci(struct qman_portal *p, u8 avail)
2305 {
2306 if (avail)
2307 qm_eqcr_cce_prefetch(&p->p);
2308 else
2309 qm_eqcr_cce_update(&p->p);
2310 }
2311
qman_enqueue(struct qman_fq * fq,const struct qm_fd * fd)2312 int qman_enqueue(struct qman_fq *fq, const struct qm_fd *fd)
2313 {
2314 struct qman_portal *p;
2315 struct qm_eqcr_entry *eq;
2316 unsigned long irqflags;
2317 u8 avail;
2318
2319 p = get_affine_portal();
2320 local_irq_save(irqflags);
2321
2322 if (p->use_eqcr_ci_stashing) {
2323 /*
2324 * The stashing case is easy, only update if we need to in
2325 * order to try and liberate ring entries.
2326 */
2327 eq = qm_eqcr_start_stash(&p->p);
2328 } else {
2329 /*
2330 * The non-stashing case is harder, need to prefetch ahead of
2331 * time.
2332 */
2333 avail = qm_eqcr_get_avail(&p->p);
2334 if (avail < 2)
2335 update_eqcr_ci(p, avail);
2336 eq = qm_eqcr_start_no_stash(&p->p);
2337 }
2338
2339 if (unlikely(!eq))
2340 goto out;
2341
2342 qm_fqid_set(eq, fq->fqid);
2343 eq->tag = cpu_to_be32(fq_to_tag(fq));
2344 eq->fd = *fd;
2345
2346 qm_eqcr_pvb_commit(&p->p, QM_EQCR_VERB_CMD_ENQUEUE);
2347 out:
2348 local_irq_restore(irqflags);
2349 put_affine_portal();
2350 return 0;
2351 }
2352 EXPORT_SYMBOL(qman_enqueue);
2353
qm_modify_cgr(struct qman_cgr * cgr,u32 flags,struct qm_mcc_initcgr * opts)2354 static int qm_modify_cgr(struct qman_cgr *cgr, u32 flags,
2355 struct qm_mcc_initcgr *opts)
2356 {
2357 union qm_mc_command *mcc;
2358 union qm_mc_result *mcr;
2359 struct qman_portal *p = get_affine_portal();
2360 u8 verb = QM_MCC_VERB_MODIFYCGR;
2361 int ret = 0;
2362
2363 mcc = qm_mc_start(&p->p);
2364 if (opts)
2365 mcc->initcgr = *opts;
2366 mcc->initcgr.cgid = cgr->cgrid;
2367 if (flags & QMAN_CGR_FLAG_USE_INIT)
2368 verb = QM_MCC_VERB_INITCGR;
2369 qm_mc_commit(&p->p, verb);
2370 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2371 ret = -ETIMEDOUT;
2372 goto out;
2373 }
2374
2375 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == verb);
2376 if (mcr->result != QM_MCR_RESULT_OK)
2377 ret = -EIO;
2378
2379 out:
2380 put_affine_portal();
2381 return ret;
2382 }
2383
2384 #define PORTAL_IDX(n) (n->config->channel - QM_CHANNEL_SWPORTAL0)
2385
2386 /* congestion state change notification target update control */
qm_cgr_cscn_targ_set(struct __qm_mc_cgr * cgr,int pi,u32 val)2387 static void qm_cgr_cscn_targ_set(struct __qm_mc_cgr *cgr, int pi, u32 val)
2388 {
2389 if (qman_ip_rev >= QMAN_REV30)
2390 cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi |
2391 QM_CGR_TARG_UDP_CTRL_WRITE_BIT);
2392 else
2393 cgr->cscn_targ = cpu_to_be32(val | QM_CGR_TARG_PORTAL(pi));
2394 }
2395
qm_cgr_cscn_targ_clear(struct __qm_mc_cgr * cgr,int pi,u32 val)2396 static void qm_cgr_cscn_targ_clear(struct __qm_mc_cgr *cgr, int pi, u32 val)
2397 {
2398 if (qman_ip_rev >= QMAN_REV30)
2399 cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi);
2400 else
2401 cgr->cscn_targ = cpu_to_be32(val & ~QM_CGR_TARG_PORTAL(pi));
2402 }
2403
2404 static u8 qman_cgr_cpus[CGR_NUM];
2405
qman_init_cgr_all(void)2406 void qman_init_cgr_all(void)
2407 {
2408 struct qman_cgr cgr;
2409 int err_cnt = 0;
2410
2411 for (cgr.cgrid = 0; cgr.cgrid < CGR_NUM; cgr.cgrid++) {
2412 if (qm_modify_cgr(&cgr, QMAN_CGR_FLAG_USE_INIT, NULL))
2413 err_cnt++;
2414 }
2415
2416 if (err_cnt)
2417 pr_err("Warning: %d error%s while initialising CGR h/w\n",
2418 err_cnt, (err_cnt > 1) ? "s" : "");
2419 }
2420
qman_create_cgr(struct qman_cgr * cgr,u32 flags,struct qm_mcc_initcgr * opts)2421 int qman_create_cgr(struct qman_cgr *cgr, u32 flags,
2422 struct qm_mcc_initcgr *opts)
2423 {
2424 struct qm_mcr_querycgr cgr_state;
2425 int ret;
2426 struct qman_portal *p;
2427
2428 /*
2429 * We have to check that the provided CGRID is within the limits of the
2430 * data-structures, for obvious reasons. However we'll let h/w take
2431 * care of determining whether it's within the limits of what exists on
2432 * the SoC.
2433 */
2434 if (cgr->cgrid >= CGR_NUM)
2435 return -EINVAL;
2436
2437 preempt_disable();
2438 p = get_affine_portal();
2439 qman_cgr_cpus[cgr->cgrid] = smp_processor_id();
2440 preempt_enable();
2441
2442 cgr->chan = p->config->channel;
2443 spin_lock(&p->cgr_lock);
2444
2445 if (opts) {
2446 struct qm_mcc_initcgr local_opts = *opts;
2447
2448 ret = qman_query_cgr(cgr, &cgr_state);
2449 if (ret)
2450 goto out;
2451
2452 qm_cgr_cscn_targ_set(&local_opts.cgr, PORTAL_IDX(p),
2453 be32_to_cpu(cgr_state.cgr.cscn_targ));
2454 local_opts.we_mask |= cpu_to_be16(QM_CGR_WE_CSCN_TARG);
2455
2456 /* send init if flags indicate so */
2457 if (flags & QMAN_CGR_FLAG_USE_INIT)
2458 ret = qm_modify_cgr(cgr, QMAN_CGR_FLAG_USE_INIT,
2459 &local_opts);
2460 else
2461 ret = qm_modify_cgr(cgr, 0, &local_opts);
2462 if (ret)
2463 goto out;
2464 }
2465
2466 list_add(&cgr->node, &p->cgr_cbs);
2467
2468 /* Determine if newly added object requires its callback to be called */
2469 ret = qman_query_cgr(cgr, &cgr_state);
2470 if (ret) {
2471 /* we can't go back, so proceed and return success */
2472 dev_err(p->config->dev, "CGR HW state partially modified\n");
2473 ret = 0;
2474 goto out;
2475 }
2476 if (cgr->cb && cgr_state.cgr.cscn_en &&
2477 qman_cgrs_get(&p->cgrs[1], cgr->cgrid))
2478 cgr->cb(p, cgr, 1);
2479 out:
2480 spin_unlock(&p->cgr_lock);
2481 put_affine_portal();
2482 return ret;
2483 }
2484 EXPORT_SYMBOL(qman_create_cgr);
2485
qman_delete_cgr(struct qman_cgr * cgr)2486 int qman_delete_cgr(struct qman_cgr *cgr)
2487 {
2488 unsigned long irqflags;
2489 struct qm_mcr_querycgr cgr_state;
2490 struct qm_mcc_initcgr local_opts;
2491 int ret = 0;
2492 struct qman_cgr *i;
2493 struct qman_portal *p = get_affine_portal();
2494
2495 if (cgr->chan != p->config->channel) {
2496 /* attempt to delete from other portal than creator */
2497 dev_err(p->config->dev, "CGR not owned by current portal");
2498 dev_dbg(p->config->dev, " create 0x%x, delete 0x%x\n",
2499 cgr->chan, p->config->channel);
2500
2501 ret = -EINVAL;
2502 goto put_portal;
2503 }
2504 memset(&local_opts, 0, sizeof(struct qm_mcc_initcgr));
2505 spin_lock_irqsave(&p->cgr_lock, irqflags);
2506 list_del(&cgr->node);
2507 /*
2508 * If there are no other CGR objects for this CGRID in the list,
2509 * update CSCN_TARG accordingly
2510 */
2511 list_for_each_entry(i, &p->cgr_cbs, node)
2512 if (i->cgrid == cgr->cgrid && i->cb)
2513 goto release_lock;
2514 ret = qman_query_cgr(cgr, &cgr_state);
2515 if (ret) {
2516 /* add back to the list */
2517 list_add(&cgr->node, &p->cgr_cbs);
2518 goto release_lock;
2519 }
2520
2521 local_opts.we_mask = cpu_to_be16(QM_CGR_WE_CSCN_TARG);
2522 qm_cgr_cscn_targ_clear(&local_opts.cgr, PORTAL_IDX(p),
2523 be32_to_cpu(cgr_state.cgr.cscn_targ));
2524
2525 ret = qm_modify_cgr(cgr, 0, &local_opts);
2526 if (ret)
2527 /* add back to the list */
2528 list_add(&cgr->node, &p->cgr_cbs);
2529 release_lock:
2530 spin_unlock_irqrestore(&p->cgr_lock, irqflags);
2531 put_portal:
2532 put_affine_portal();
2533 return ret;
2534 }
2535 EXPORT_SYMBOL(qman_delete_cgr);
2536
2537 struct cgr_comp {
2538 struct qman_cgr *cgr;
2539 struct completion completion;
2540 };
2541
qman_delete_cgr_smp_call(void * p)2542 static void qman_delete_cgr_smp_call(void *p)
2543 {
2544 qman_delete_cgr((struct qman_cgr *)p);
2545 }
2546
qman_delete_cgr_safe(struct qman_cgr * cgr)2547 void qman_delete_cgr_safe(struct qman_cgr *cgr)
2548 {
2549 preempt_disable();
2550 if (qman_cgr_cpus[cgr->cgrid] != smp_processor_id()) {
2551 smp_call_function_single(qman_cgr_cpus[cgr->cgrid],
2552 qman_delete_cgr_smp_call, cgr, true);
2553 preempt_enable();
2554 return;
2555 }
2556
2557 qman_delete_cgr(cgr);
2558 preempt_enable();
2559 }
2560 EXPORT_SYMBOL(qman_delete_cgr_safe);
2561
2562 /* Cleanup FQs */
2563
_qm_mr_consume_and_match_verb(struct qm_portal * p,int v)2564 static int _qm_mr_consume_and_match_verb(struct qm_portal *p, int v)
2565 {
2566 const union qm_mr_entry *msg;
2567 int found = 0;
2568
2569 qm_mr_pvb_update(p);
2570 msg = qm_mr_current(p);
2571 while (msg) {
2572 if ((msg->verb & QM_MR_VERB_TYPE_MASK) == v)
2573 found = 1;
2574 qm_mr_next(p);
2575 qm_mr_cci_consume_to_current(p);
2576 qm_mr_pvb_update(p);
2577 msg = qm_mr_current(p);
2578 }
2579 return found;
2580 }
2581
_qm_dqrr_consume_and_match(struct qm_portal * p,u32 fqid,int s,bool wait)2582 static int _qm_dqrr_consume_and_match(struct qm_portal *p, u32 fqid, int s,
2583 bool wait)
2584 {
2585 const struct qm_dqrr_entry *dqrr;
2586 int found = 0;
2587
2588 do {
2589 qm_dqrr_pvb_update(p);
2590 dqrr = qm_dqrr_current(p);
2591 if (!dqrr)
2592 cpu_relax();
2593 } while (wait && !dqrr);
2594
2595 while (dqrr) {
2596 if (qm_fqid_get(dqrr) == fqid && (dqrr->stat & s))
2597 found = 1;
2598 qm_dqrr_cdc_consume_1ptr(p, dqrr, 0);
2599 qm_dqrr_pvb_update(p);
2600 qm_dqrr_next(p);
2601 dqrr = qm_dqrr_current(p);
2602 }
2603 return found;
2604 }
2605
2606 #define qm_mr_drain(p, V) \
2607 _qm_mr_consume_and_match_verb(p, QM_MR_VERB_##V)
2608
2609 #define qm_dqrr_drain(p, f, S) \
2610 _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, false)
2611
2612 #define qm_dqrr_drain_wait(p, f, S) \
2613 _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, true)
2614
2615 #define qm_dqrr_drain_nomatch(p) \
2616 _qm_dqrr_consume_and_match(p, 0, 0, false)
2617
qman_shutdown_fq(u32 fqid)2618 int qman_shutdown_fq(u32 fqid)
2619 {
2620 struct qman_portal *p, *channel_portal;
2621 struct device *dev;
2622 union qm_mc_command *mcc;
2623 union qm_mc_result *mcr;
2624 int orl_empty, drain = 0, ret = 0;
2625 u32 channel, wq, res;
2626 u8 state;
2627
2628 p = get_affine_portal();
2629 dev = p->config->dev;
2630 /* Determine the state of the FQID */
2631 mcc = qm_mc_start(&p->p);
2632 qm_fqid_set(&mcc->fq, fqid);
2633 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
2634 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2635 dev_err(dev, "QUERYFQ_NP timeout\n");
2636 ret = -ETIMEDOUT;
2637 goto out;
2638 }
2639
2640 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
2641 state = mcr->queryfq_np.state & QM_MCR_NP_STATE_MASK;
2642 if (state == QM_MCR_NP_STATE_OOS)
2643 goto out; /* Already OOS, no need to do anymore checks */
2644
2645 /* Query which channel the FQ is using */
2646 mcc = qm_mc_start(&p->p);
2647 qm_fqid_set(&mcc->fq, fqid);
2648 qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
2649 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2650 dev_err(dev, "QUERYFQ timeout\n");
2651 ret = -ETIMEDOUT;
2652 goto out;
2653 }
2654
2655 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
2656 /* Need to store these since the MCR gets reused */
2657 channel = qm_fqd_get_chan(&mcr->queryfq.fqd);
2658 wq = qm_fqd_get_wq(&mcr->queryfq.fqd);
2659
2660 if (channel < qm_channel_pool1) {
2661 channel_portal = get_portal_for_channel(channel);
2662 if (channel_portal == NULL) {
2663 dev_err(dev, "Can't find portal for dedicated channel 0x%x\n",
2664 channel);
2665 ret = -EIO;
2666 goto out;
2667 }
2668 } else
2669 channel_portal = p;
2670
2671 switch (state) {
2672 case QM_MCR_NP_STATE_TEN_SCHED:
2673 case QM_MCR_NP_STATE_TRU_SCHED:
2674 case QM_MCR_NP_STATE_ACTIVE:
2675 case QM_MCR_NP_STATE_PARKED:
2676 orl_empty = 0;
2677 mcc = qm_mc_start(&channel_portal->p);
2678 qm_fqid_set(&mcc->fq, fqid);
2679 qm_mc_commit(&channel_portal->p, QM_MCC_VERB_ALTER_RETIRE);
2680 if (!qm_mc_result_timeout(&channel_portal->p, &mcr)) {
2681 dev_err(dev, "ALTER_RETIRE timeout\n");
2682 ret = -ETIMEDOUT;
2683 goto out;
2684 }
2685 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2686 QM_MCR_VERB_ALTER_RETIRE);
2687 res = mcr->result; /* Make a copy as we reuse MCR below */
2688
2689 if (res == QM_MCR_RESULT_OK)
2690 drain_mr_fqrni(&channel_portal->p);
2691
2692 if (res == QM_MCR_RESULT_PENDING) {
2693 /*
2694 * Need to wait for the FQRN in the message ring, which
2695 * will only occur once the FQ has been drained. In
2696 * order for the FQ to drain the portal needs to be set
2697 * to dequeue from the channel the FQ is scheduled on
2698 */
2699 int found_fqrn = 0;
2700 u16 dequeue_wq = 0;
2701
2702 /* Flag that we need to drain FQ */
2703 drain = 1;
2704
2705 if (channel >= qm_channel_pool1 &&
2706 channel < qm_channel_pool1 + 15) {
2707 /* Pool channel, enable the bit in the portal */
2708 dequeue_wq = (channel -
2709 qm_channel_pool1 + 1)<<4 | wq;
2710 } else if (channel < qm_channel_pool1) {
2711 /* Dedicated channel */
2712 dequeue_wq = wq;
2713 } else {
2714 dev_err(dev, "Can't recover FQ 0x%x, ch: 0x%x",
2715 fqid, channel);
2716 ret = -EBUSY;
2717 goto out;
2718 }
2719 /* Set the sdqcr to drain this channel */
2720 if (channel < qm_channel_pool1)
2721 qm_dqrr_sdqcr_set(&channel_portal->p,
2722 QM_SDQCR_TYPE_ACTIVE |
2723 QM_SDQCR_CHANNELS_DEDICATED);
2724 else
2725 qm_dqrr_sdqcr_set(&channel_portal->p,
2726 QM_SDQCR_TYPE_ACTIVE |
2727 QM_SDQCR_CHANNELS_POOL_CONV
2728 (channel));
2729 do {
2730 /* Keep draining DQRR while checking the MR*/
2731 qm_dqrr_drain_nomatch(&channel_portal->p);
2732 /* Process message ring too */
2733 found_fqrn = qm_mr_drain(&channel_portal->p,
2734 FQRN);
2735 cpu_relax();
2736 } while (!found_fqrn);
2737 /* Restore SDQCR */
2738 qm_dqrr_sdqcr_set(&channel_portal->p,
2739 channel_portal->sdqcr);
2740
2741 }
2742 if (res != QM_MCR_RESULT_OK &&
2743 res != QM_MCR_RESULT_PENDING) {
2744 dev_err(dev, "retire_fq failed: FQ 0x%x, res=0x%x\n",
2745 fqid, res);
2746 ret = -EIO;
2747 goto out;
2748 }
2749 if (!(mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)) {
2750 /*
2751 * ORL had no entries, no need to wait until the
2752 * ERNs come in
2753 */
2754 orl_empty = 1;
2755 }
2756 /*
2757 * Retirement succeeded, check to see if FQ needs
2758 * to be drained
2759 */
2760 if (drain || mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY) {
2761 /* FQ is Not Empty, drain using volatile DQ commands */
2762 do {
2763 u32 vdqcr = fqid | QM_VDQCR_NUMFRAMES_SET(3);
2764
2765 qm_dqrr_vdqcr_set(&p->p, vdqcr);
2766 /*
2767 * Wait for a dequeue and process the dequeues,
2768 * making sure to empty the ring completely
2769 */
2770 } while (!qm_dqrr_drain_wait(&p->p, fqid, FQ_EMPTY));
2771 }
2772
2773 while (!orl_empty) {
2774 /* Wait for the ORL to have been completely drained */
2775 orl_empty = qm_mr_drain(&p->p, FQRL);
2776 cpu_relax();
2777 }
2778 mcc = qm_mc_start(&p->p);
2779 qm_fqid_set(&mcc->fq, fqid);
2780 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2781 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2782 ret = -ETIMEDOUT;
2783 goto out;
2784 }
2785
2786 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2787 QM_MCR_VERB_ALTER_OOS);
2788 if (mcr->result != QM_MCR_RESULT_OK) {
2789 dev_err(dev, "OOS after drain fail: FQ 0x%x (0x%x)\n",
2790 fqid, mcr->result);
2791 ret = -EIO;
2792 goto out;
2793 }
2794 break;
2795
2796 case QM_MCR_NP_STATE_RETIRED:
2797 /* Send OOS Command */
2798 mcc = qm_mc_start(&p->p);
2799 qm_fqid_set(&mcc->fq, fqid);
2800 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2801 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2802 ret = -ETIMEDOUT;
2803 goto out;
2804 }
2805
2806 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2807 QM_MCR_VERB_ALTER_OOS);
2808 if (mcr->result != QM_MCR_RESULT_OK) {
2809 dev_err(dev, "OOS fail: FQ 0x%x (0x%x)\n",
2810 fqid, mcr->result);
2811 ret = -EIO;
2812 goto out;
2813 }
2814 break;
2815
2816 case QM_MCR_NP_STATE_OOS:
2817 /* Done */
2818 break;
2819
2820 default:
2821 ret = -EIO;
2822 }
2823
2824 out:
2825 put_affine_portal();
2826 return ret;
2827 }
2828
qman_get_qm_portal_config(struct qman_portal * portal)2829 const struct qm_portal_config *qman_get_qm_portal_config(
2830 struct qman_portal *portal)
2831 {
2832 return portal->config;
2833 }
2834 EXPORT_SYMBOL(qman_get_qm_portal_config);
2835
2836 struct gen_pool *qm_fqalloc; /* FQID allocator */
2837 struct gen_pool *qm_qpalloc; /* pool-channel allocator */
2838 struct gen_pool *qm_cgralloc; /* CGR ID allocator */
2839
qman_alloc_range(struct gen_pool * p,u32 * result,u32 cnt)2840 static int qman_alloc_range(struct gen_pool *p, u32 *result, u32 cnt)
2841 {
2842 unsigned long addr;
2843
2844 if (!p)
2845 return -ENODEV;
2846
2847 addr = gen_pool_alloc(p, cnt);
2848 if (!addr)
2849 return -ENOMEM;
2850
2851 *result = addr & ~DPAA_GENALLOC_OFF;
2852
2853 return 0;
2854 }
2855
qman_alloc_fqid_range(u32 * result,u32 count)2856 int qman_alloc_fqid_range(u32 *result, u32 count)
2857 {
2858 return qman_alloc_range(qm_fqalloc, result, count);
2859 }
2860 EXPORT_SYMBOL(qman_alloc_fqid_range);
2861
qman_alloc_pool_range(u32 * result,u32 count)2862 int qman_alloc_pool_range(u32 *result, u32 count)
2863 {
2864 return qman_alloc_range(qm_qpalloc, result, count);
2865 }
2866 EXPORT_SYMBOL(qman_alloc_pool_range);
2867
qman_alloc_cgrid_range(u32 * result,u32 count)2868 int qman_alloc_cgrid_range(u32 *result, u32 count)
2869 {
2870 return qman_alloc_range(qm_cgralloc, result, count);
2871 }
2872 EXPORT_SYMBOL(qman_alloc_cgrid_range);
2873
qman_release_fqid(u32 fqid)2874 int qman_release_fqid(u32 fqid)
2875 {
2876 int ret = qman_shutdown_fq(fqid);
2877
2878 if (ret) {
2879 pr_debug("FQID %d leaked\n", fqid);
2880 return ret;
2881 }
2882
2883 gen_pool_free(qm_fqalloc, fqid | DPAA_GENALLOC_OFF, 1);
2884 return 0;
2885 }
2886 EXPORT_SYMBOL(qman_release_fqid);
2887
qpool_cleanup(u32 qp)2888 static int qpool_cleanup(u32 qp)
2889 {
2890 /*
2891 * We query all FQDs starting from
2892 * FQID 1 until we get an "invalid FQID" error, looking for non-OOS FQDs
2893 * whose destination channel is the pool-channel being released.
2894 * When a non-OOS FQD is found we attempt to clean it up
2895 */
2896 struct qman_fq fq = {
2897 .fqid = QM_FQID_RANGE_START
2898 };
2899 int err;
2900
2901 do {
2902 struct qm_mcr_queryfq_np np;
2903
2904 err = qman_query_fq_np(&fq, &np);
2905 if (err == -ERANGE)
2906 /* FQID range exceeded, found no problems */
2907 return 0;
2908 else if (WARN_ON(err))
2909 return err;
2910
2911 if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
2912 struct qm_fqd fqd;
2913
2914 err = qman_query_fq(&fq, &fqd);
2915 if (WARN_ON(err))
2916 return err;
2917 if (qm_fqd_get_chan(&fqd) == qp) {
2918 /* The channel is the FQ's target, clean it */
2919 err = qman_shutdown_fq(fq.fqid);
2920 if (err)
2921 /*
2922 * Couldn't shut down the FQ
2923 * so the pool must be leaked
2924 */
2925 return err;
2926 }
2927 }
2928 /* Move to the next FQID */
2929 fq.fqid++;
2930 } while (1);
2931 }
2932
qman_release_pool(u32 qp)2933 int qman_release_pool(u32 qp)
2934 {
2935 int ret;
2936
2937 ret = qpool_cleanup(qp);
2938 if (ret) {
2939 pr_debug("CHID %d leaked\n", qp);
2940 return ret;
2941 }
2942
2943 gen_pool_free(qm_qpalloc, qp | DPAA_GENALLOC_OFF, 1);
2944 return 0;
2945 }
2946 EXPORT_SYMBOL(qman_release_pool);
2947
cgr_cleanup(u32 cgrid)2948 static int cgr_cleanup(u32 cgrid)
2949 {
2950 /*
2951 * query all FQDs starting from FQID 1 until we get an "invalid FQID"
2952 * error, looking for non-OOS FQDs whose CGR is the CGR being released
2953 */
2954 struct qman_fq fq = {
2955 .fqid = QM_FQID_RANGE_START
2956 };
2957 int err;
2958
2959 do {
2960 struct qm_mcr_queryfq_np np;
2961
2962 err = qman_query_fq_np(&fq, &np);
2963 if (err == -ERANGE)
2964 /* FQID range exceeded, found no problems */
2965 return 0;
2966 else if (WARN_ON(err))
2967 return err;
2968
2969 if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
2970 struct qm_fqd fqd;
2971
2972 err = qman_query_fq(&fq, &fqd);
2973 if (WARN_ON(err))
2974 return err;
2975 if (be16_to_cpu(fqd.fq_ctrl) & QM_FQCTRL_CGE &&
2976 fqd.cgid == cgrid) {
2977 pr_err("CRGID 0x%x is being used by FQID 0x%x, CGR will be leaked\n",
2978 cgrid, fq.fqid);
2979 return -EIO;
2980 }
2981 }
2982 /* Move to the next FQID */
2983 fq.fqid++;
2984 } while (1);
2985 }
2986
qman_release_cgrid(u32 cgrid)2987 int qman_release_cgrid(u32 cgrid)
2988 {
2989 int ret;
2990
2991 ret = cgr_cleanup(cgrid);
2992 if (ret) {
2993 pr_debug("CGRID %d leaked\n", cgrid);
2994 return ret;
2995 }
2996
2997 gen_pool_free(qm_cgralloc, cgrid | DPAA_GENALLOC_OFF, 1);
2998 return 0;
2999 }
3000 EXPORT_SYMBOL(qman_release_cgrid);
3001