drivers/soc/fsl/qbman/qman.c

   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;
 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. */
 363 static inline u32 qm_in(struct qm_portal *p, u32 offset)
 364 {
 365         return ioread32be(p->addr.ci + offset);
 366 }
 367
 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 */
 374 static inline void qm_cl_invalidate(struct qm_portal *p, u32 offset)
 375 {
 376         dpaa_invalidate(p->addr.ce + offset);
 377 }
 378
 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
 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" */
 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 */
 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 */
 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
 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
 452 static inline unsigned int qm_eqcr_get_ci_stashing(struct qm_portal *portal)
 453 {
 454         return (qm_in(portal, QM_REG_CFG) >> 28) & 0x7;
 455 }
 456
 457 static inline void qm_eqcr_finish(struct qm_portal *portal)
 458 {
 459         struct qm_eqcr *eqcr = &portal->eqcr;
 460         u8 pi = qm_in(portal, QM_REG_EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
 461         u8 ci = qm_in(portal, QM_REG_EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);
 462
 463         DPAA_ASSERT(!eqcr->busy);
 464         if (pi != eqcr_ptr2idx(eqcr->cursor))
 465                 pr_crit("losing uncommitted EQCR entries\n");
 466         if (ci != eqcr->ci)
 467                 pr_crit("missing existing EQCR completions\n");
 468         if (eqcr->ci != eqcr_ptr2idx(eqcr->cursor))
 469                 pr_crit("EQCR destroyed unquiesced\n");
 470 }
 471
 472 static inline struct qm_eqcr_entry *qm_eqcr_start_no_stash(struct qm_portal
 473                                                                  *portal)
 474 {
 475         struct qm_eqcr *eqcr = &portal->eqcr;
 476
 477         DPAA_ASSERT(!eqcr->busy);
 478         if (!eqcr->available)
 479                 return NULL;
 480
 481 #ifdef CONFIG_FSL_DPAA_CHECKING
 482         eqcr->busy = 1;
 483 #endif
 484         dpaa_zero(eqcr->cursor);
 485         return eqcr->cursor;
 486 }
 487
 488 static inline struct qm_eqcr_entry *qm_eqcr_start_stash(struct qm_portal
 489                                                                 *portal)
 490 {
 491         struct qm_eqcr *eqcr = &portal->eqcr;
 492         u8 diff, old_ci;
 493
 494         DPAA_ASSERT(!eqcr->busy);
 495         if (!eqcr->available) {
 496                 old_ci = eqcr->ci;
 497                 eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) &
 498                            (QM_EQCR_SIZE - 1);
 499                 diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
 500                 eqcr->available += diff;
 501                 if (!diff)
 502                         return NULL;
 503         }
 504 #ifdef CONFIG_FSL_DPAA_CHECKING
 505         eqcr->busy = 1;
 506 #endif
 507         dpaa_zero(eqcr->cursor);
 508         return eqcr->cursor;
 509 }
 510
 511 static inline void eqcr_commit_checks(struct qm_eqcr *eqcr)
 512 {
 513         DPAA_ASSERT(eqcr->busy);
 514         DPAA_ASSERT(!(be32_to_cpu(eqcr->cursor->fqid) & ~QM_FQID_MASK));
 515         DPAA_ASSERT(eqcr->available >= 1);
 516 }
 517
 518 static inline void qm_eqcr_pvb_commit(struct qm_portal *portal, u8 myverb)
 519 {
 520         struct qm_eqcr *eqcr = &portal->eqcr;
 521         struct qm_eqcr_entry *eqcursor;
 522
 523         eqcr_commit_checks(eqcr);
 524         DPAA_ASSERT(eqcr->pmode == qm_eqcr_pvb);
 525         dma_wmb();
 526         eqcursor = eqcr->cursor;
 527         eqcursor->_ncw_verb = myverb | eqcr->vbit;
 528         dpaa_flush(eqcursor);
 529         eqcr_inc(eqcr);
 530         eqcr->available--;
 531 #ifdef CONFIG_FSL_DPAA_CHECKING
 532         eqcr->busy = 0;
 533 #endif
 534 }
 535
 536 static inline void qm_eqcr_cce_prefetch(struct qm_portal *portal)
 537 {
 538         qm_cl_touch_ro(portal, QM_CL_EQCR_CI_CENA);
 539 }
 540
 541 static inline u8 qm_eqcr_cce_update(struct qm_portal *portal)
 542 {
 543         struct qm_eqcr *eqcr = &portal->eqcr;
 544         u8 diff, old_ci = eqcr->ci;
 545
 546         eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) & (QM_EQCR_SIZE - 1);
 547         qm_cl_invalidate(portal, QM_CL_EQCR_CI_CENA);
 548         diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
 549         eqcr->available += diff;
 550         return diff;
 551 }
 552
 553 static inline void qm_eqcr_set_ithresh(struct qm_portal *portal, u8 ithresh)
 554 {
 555         struct qm_eqcr *eqcr = &portal->eqcr;
 556
 557         eqcr->ithresh = ithresh;
 558         qm_out(portal, QM_REG_EQCR_ITR, ithresh);
 559 }
 560
 561 static inline u8 qm_eqcr_get_avail(struct qm_portal *portal)
 562 {
 563         struct qm_eqcr *eqcr = &portal->eqcr;
 564
 565         return eqcr->available;
 566 }
 567
 568 static inline u8 qm_eqcr_get_fill(struct qm_portal *portal)
 569 {
 570         struct qm_eqcr *eqcr = &portal->eqcr;
 571
 572         return QM_EQCR_SIZE - 1 - eqcr->available;
 573 }
 574
 575 /* --- DQRR API --- */
 576
 577 #define DQRR_SHIFT      ilog2(sizeof(struct qm_dqrr_entry))
 578 #define DQRR_CARRY      (uintptr_t)(QM_DQRR_SIZE << DQRR_SHIFT)
 579
 580 static const struct qm_dqrr_entry *dqrr_carryclear(
 581                                         const struct qm_dqrr_entry *p)
 582 {
 583         uintptr_t addr = (uintptr_t)p;
 584
 585         addr &= ~DQRR_CARRY;
 586
 587         return (const struct qm_dqrr_entry *)addr;
 588 }
 589
 590 static inline int dqrr_ptr2idx(const struct qm_dqrr_entry *e)
 591 {
 592         return ((uintptr_t)e >> DQRR_SHIFT) & (QM_DQRR_SIZE - 1);
 593 }
 594
 595 static const struct qm_dqrr_entry *dqrr_inc(const struct qm_dqrr_entry *e)
 596 {
 597         return dqrr_carryclear(e + 1);
 598 }
 599
 600 static inline void qm_dqrr_set_maxfill(struct qm_portal *portal, u8 mf)
 601 {
 602         qm_out(portal, QM_REG_CFG, (qm_in(portal, QM_REG_CFG) & 0xff0fffff) |
 603                                    ((mf & (QM_DQRR_SIZE - 1)) << 20));
 604 }
 605
 606 static inline int qm_dqrr_init(struct qm_portal *portal,
 607                                const struct qm_portal_config *config,
 608                                enum qm_dqrr_dmode dmode,
 609                                enum qm_dqrr_pmode pmode,
 610                                enum qm_dqrr_cmode cmode, u8 max_fill)
 611 {
 612         struct qm_dqrr *dqrr = &portal->dqrr;
 613         u32 cfg;
 614
 615         /* Make sure the DQRR will be idle when we enable */
 616         qm_out(portal, QM_REG_DQRR_SDQCR, 0);
 617         qm_out(portal, QM_REG_DQRR_VDQCR, 0);
 618         qm_out(portal, QM_REG_DQRR_PDQCR, 0);
 619         dqrr->ring = portal->addr.ce + QM_CL_DQRR;
 620         dqrr->pi = qm_in(portal, QM_REG_DQRR_PI_CINH) & (QM_DQRR_SIZE - 1);
 621         dqrr->ci = qm_in(portal, QM_REG_DQRR_CI_CINH) & (QM_DQRR_SIZE - 1);
 622         dqrr->cursor = dqrr->ring + dqrr->ci;
 623         dqrr->fill = dpaa_cyc_diff(QM_DQRR_SIZE, dqrr->ci, dqrr->pi);
 624         dqrr->vbit = (qm_in(portal, QM_REG_DQRR_PI_CINH) & QM_DQRR_SIZE) ?
 625                         QM_DQRR_VERB_VBIT : 0;
 626         dqrr->ithresh = qm_in(portal, QM_REG_DQRR_ITR);
 627 #ifdef CONFIG_FSL_DPAA_CHECKING
 628         dqrr->dmode = dmode;
 629         dqrr->pmode = pmode;
 630         dqrr->cmode = cmode;
 631 #endif
 632         /* Invalidate every ring entry before beginning */
 633         for (cfg = 0; cfg < QM_DQRR_SIZE; cfg++)
 634                 dpaa_invalidate(qm_cl(dqrr->ring, cfg));
 635         cfg = (qm_in(portal, QM_REG_CFG) & 0xff000f00) |
 636                 ((max_fill & (QM_DQRR_SIZE - 1)) << 20) | /* DQRR_MF */
 637                 ((dmode & 1) << 18) |                   /* DP */
 638                 ((cmode & 3) << 16) |                   /* DCM */
 639                 0xa0 |                                  /* RE+SE */
 640                 (0 ? 0x40 : 0) |                        /* Ignore RP */
 641                 (0 ? 0x10 : 0);                         /* Ignore SP */
 642         qm_out(portal, QM_REG_CFG, cfg);
 643         qm_dqrr_set_maxfill(portal, max_fill);
 644         return 0;
 645 }
 646
 647 static inline void qm_dqrr_finish(struct qm_portal *portal)
 648 {
 649 #ifdef CONFIG_FSL_DPAA_CHECKING
 650         struct qm_dqrr *dqrr = &portal->dqrr;
 651
 652         if (dqrr->cmode != qm_dqrr_cdc &&
 653             dqrr->ci != dqrr_ptr2idx(dqrr->cursor))
 654                 pr_crit("Ignoring completed DQRR entries\n");
 655 #endif
 656 }
 657
 658 static inline const struct qm_dqrr_entry *qm_dqrr_current(
 659                                                 struct qm_portal *portal)
 660 {
 661         struct qm_dqrr *dqrr = &portal->dqrr;
 662
 663         if (!dqrr->fill)
 664                 return NULL;
 665         return dqrr->cursor;
 666 }
 667
 668 static inline u8 qm_dqrr_next(struct qm_portal *portal)
 669 {
 670         struct qm_dqrr *dqrr = &portal->dqrr;
 671
 672         DPAA_ASSERT(dqrr->fill);
 673         dqrr->cursor = dqrr_inc(dqrr->cursor);
 674         return --dqrr->fill;
 675 }
 676
 677 static inline void qm_dqrr_pvb_update(struct qm_portal *portal)
 678 {
 679         struct qm_dqrr *dqrr = &portal->dqrr;
 680         struct qm_dqrr_entry *res = qm_cl(dqrr->ring, dqrr->pi);
 681
 682         DPAA_ASSERT(dqrr->pmode == qm_dqrr_pvb);
 683 #ifndef CONFIG_FSL_PAMU
 684         /*
 685          * If PAMU is not available we need to invalidate the cache.
 686          * When PAMU is available the cache is updated by stash
 687          */
 688         dpaa_invalidate_touch_ro(res);
 689 #endif
 690         if ((res->verb & QM_DQRR_VERB_VBIT) == dqrr->vbit) {
 691                 dqrr->pi = (dqrr->pi + 1) & (QM_DQRR_SIZE - 1);
 692                 if (!dqrr->pi)
 693                         dqrr->vbit ^= QM_DQRR_VERB_VBIT;
 694                 dqrr->fill++;
 695         }
 696 }
 697
 698 static inline void qm_dqrr_cdc_consume_1ptr(struct qm_portal *portal,
 699                                         const struct qm_dqrr_entry *dq,
 700                                         int park)
 701 {
 702         __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;
 703         int idx = dqrr_ptr2idx(dq);
 704
 705         DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
 706         DPAA_ASSERT((dqrr->ring + idx) == dq);
 707         DPAA_ASSERT(idx < QM_DQRR_SIZE);
 708         qm_out(portal, QM_REG_DQRR_DCAP, (0 << 8) | /* DQRR_DCAP::S */
 709                ((park ? 1 : 0) << 6) |              /* DQRR_DCAP::PK */
 710                idx);                                /* DQRR_DCAP::DCAP_CI */
 711 }
 712
 713 static inline void qm_dqrr_cdc_consume_n(struct qm_portal *portal, u32 bitmask)
 714 {
 715         __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;
 716
 717         DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
 718         qm_out(portal, QM_REG_DQRR_DCAP, (1 << 8) | /* DQRR_DCAP::S */
 719                (bitmask << 16));                    /* DQRR_DCAP::DCAP_CI */
 720 }
 721
 722 static inline void qm_dqrr_sdqcr_set(struct qm_portal *portal, u32 sdqcr)
 723 {
 724         qm_out(portal, QM_REG_DQRR_SDQCR, sdqcr);
 725 }
 726
 727 static inline void qm_dqrr_vdqcr_set(struct qm_portal *portal, u32 vdqcr)
 728 {
 729         qm_out(portal, QM_REG_DQRR_VDQCR, vdqcr);
 730 }
 731
 732 static inline int qm_dqrr_set_ithresh(struct qm_portal *portal, u8 ithresh)
 733 {
 734
 735         if (ithresh > QMAN_DQRR_IT_MAX)
 736                 return -EINVAL;
 737
 738         qm_out(portal, QM_REG_DQRR_ITR, ithresh);
 739
 740         return 0;
 741 }
 742
 743 /* --- MR API --- */
 744
 745 #define MR_SHIFT        ilog2(sizeof(union qm_mr_entry))
 746 #define MR_CARRY        (uintptr_t)(QM_MR_SIZE << MR_SHIFT)
 747
 748 static union qm_mr_entry *mr_carryclear(union qm_mr_entry *p)
 749 {
 750         uintptr_t addr = (uintptr_t)p;
 751
 752         addr &= ~MR_CARRY;
 753
 754         return (union qm_mr_entry *)addr;
 755 }
 756
 757 static inline int mr_ptr2idx(const union qm_mr_entry *e)
 758 {
 759         return ((uintptr_t)e >> MR_SHIFT) & (QM_MR_SIZE - 1);
 760 }
 761
 762 static inline union qm_mr_entry *mr_inc(union qm_mr_entry *e)
 763 {
 764         return mr_carryclear(e + 1);
 765 }
 766
 767 static inline int qm_mr_init(struct qm_portal *portal, enum qm_mr_pmode pmode,
 768                              enum qm_mr_cmode cmode)
 769 {
 770         struct qm_mr *mr = &portal->mr;
 771         u32 cfg;
 772
 773         mr->ring = portal->addr.ce + QM_CL_MR;
 774         mr->pi = qm_in(portal, QM_REG_MR_PI_CINH) & (QM_MR_SIZE - 1);
 775         mr->ci = qm_in(portal, QM_REG_MR_CI_CINH) & (QM_MR_SIZE - 1);
 776         mr->cursor = mr->ring + mr->ci;
 777         mr->fill = dpaa_cyc_diff(QM_MR_SIZE, mr->ci, mr->pi);
 778         mr->vbit = (qm_in(portal, QM_REG_MR_PI_CINH) & QM_MR_SIZE)
 779                 ? QM_MR_VERB_VBIT : 0;
 780         mr->ithresh = qm_in(portal, QM_REG_MR_ITR);
 781 #ifdef CONFIG_FSL_DPAA_CHECKING
 782         mr->pmode = pmode;
 783         mr->cmode = cmode;
 784 #endif
 785         cfg = (qm_in(portal, QM_REG_CFG) & 0xfffff0ff) |
 786               ((cmode & 1) << 8);       /* QCSP_CFG:MM */
 787         qm_out(portal, QM_REG_CFG, cfg);
 788         return 0;
 789 }
 790
 791 static inline void qm_mr_finish(struct qm_portal *portal)
 792 {
 793         struct qm_mr *mr = &portal->mr;
 794
 795         if (mr->ci != mr_ptr2idx(mr->cursor))
 796                 pr_crit("Ignoring completed MR entries\n");
 797 }
 798
 799 static inline const union qm_mr_entry *qm_mr_current(struct qm_portal *portal)
 800 {
 801         struct qm_mr *mr = &portal->mr;
 802
 803         if (!mr->fill)
 804                 return NULL;
 805         return mr->cursor;
 806 }
 807
 808 static inline int qm_mr_next(struct qm_portal *portal)
 809 {
 810         struct qm_mr *mr = &portal->mr;
 811
 812         DPAA_ASSERT(mr->fill);
 813         mr->cursor = mr_inc(mr->cursor);
 814         return --mr->fill;
 815 }
 816
 817 static inline void qm_mr_pvb_update(struct qm_portal *portal)
 818 {
 819         struct qm_mr *mr = &portal->mr;
 820         union qm_mr_entry *res = qm_cl(mr->ring, mr->pi);
 821
 822         DPAA_ASSERT(mr->pmode == qm_mr_pvb);
 823
 824         if ((res->verb & QM_MR_VERB_VBIT) == mr->vbit) {
 825                 mr->pi = (mr->pi + 1) & (QM_MR_SIZE - 1);
 826                 if (!mr->pi)
 827                         mr->vbit ^= QM_MR_VERB_VBIT;
 828                 mr->fill++;
 829                 res = mr_inc(res);
 830         }
 831         dpaa_invalidate_touch_ro(res);
 832 }
 833
 834 static inline void qm_mr_cci_consume(struct qm_portal *portal, u8 num)
 835 {
 836         struct qm_mr *mr = &portal->mr;
 837
 838         DPAA_ASSERT(mr->cmode == qm_mr_cci);
 839         mr->ci = (mr->ci + num) & (QM_MR_SIZE - 1);
 840         qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
 841 }
 842
 843 static inline void qm_mr_cci_consume_to_current(struct qm_portal *portal)
 844 {
 845         struct qm_mr *mr = &portal->mr;
 846
 847         DPAA_ASSERT(mr->cmode == qm_mr_cci);
 848         mr->ci = mr_ptr2idx(mr->cursor);
 849         qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
 850 }
 851
 852 static inline void qm_mr_set_ithresh(struct qm_portal *portal, u8 ithresh)
 853 {
 854         qm_out(portal, QM_REG_MR_ITR, ithresh);
 855 }
 856
 857 /* --- Management command API --- */
 858
 859 static inline int qm_mc_init(struct qm_portal *portal)
 860 {
 861         u8 rr0, rr1;
 862         struct qm_mc *mc = &portal->mc;
 863
 864         mc->cr = portal->addr.ce + QM_CL_CR;
 865         mc->rr = portal->addr.ce + QM_CL_RR0;
 866         /*
 867          * The expected valid bit polarity for the next CR command is 0
 868          * if RR1 contains a valid response, and is 1 if RR0 contains a
 869          * valid response. If both RR contain all 0, this indicates either
 870          * that no command has been executed since reset (in which case the
 871          * expected valid bit polarity is 1)
 872          */
 873         rr0 = mc->rr->verb;
 874         rr1 = (mc->rr+1)->verb;
 875         if ((rr0 == 0 && rr1 == 0) || rr0 != 0)
 876                 mc->rridx = 1;
 877         else
 878                 mc->rridx = 0;
 879         mc->vbit = mc->rridx ? QM_MCC_VERB_VBIT : 0;
 880 #ifdef CONFIG_FSL_DPAA_CHECKING
 881         mc->state = qman_mc_idle;
 882 #endif
 883         return 0;
 884 }
 885
 886 static inline void qm_mc_finish(struct qm_portal *portal)
 887 {
 888 #ifdef CONFIG_FSL_DPAA_CHECKING
 889         struct qm_mc *mc = &portal->mc;
 890
 891         DPAA_ASSERT(mc->state == qman_mc_idle);
 892         if (mc->state != qman_mc_idle)
 893                 pr_crit("Losing incomplete MC command\n");
 894 #endif
 895 }
 896
 897 static inline union qm_mc_command *qm_mc_start(struct qm_portal *portal)
 898 {
 899         struct qm_mc *mc = &portal->mc;
 900
 901         DPAA_ASSERT(mc->state == qman_mc_idle);
 902 #ifdef CONFIG_FSL_DPAA_CHECKING
 903         mc->state = qman_mc_user;
 904 #endif
 905         dpaa_zero(mc->cr);
 906         return mc->cr;
 907 }
 908
 909 static inline void qm_mc_commit(struct qm_portal *portal, u8 myverb)
 910 {
 911         struct qm_mc *mc = &portal->mc;
 912         union qm_mc_result *rr = mc->rr + mc->rridx;
 913
 914         DPAA_ASSERT(mc->state == qman_mc_user);
 915         dma_wmb();
 916         mc->cr->_ncw_verb = myverb | mc->vbit;
 917         dpaa_flush(mc->cr);
 918         dpaa_invalidate_touch_ro(rr);
 919 #ifdef CONFIG_FSL_DPAA_CHECKING
 920         mc->state = qman_mc_hw;
 921 #endif
 922 }
 923
 924 static inline union qm_mc_result *qm_mc_result(struct qm_portal *portal)
 925 {
 926         struct qm_mc *mc = &portal->mc;
 927         union qm_mc_result *rr = mc->rr + mc->rridx;
 928
 929         DPAA_ASSERT(mc->state == qman_mc_hw);
 930         /*
 931          *  The inactive response register's verb byte always returns zero until
 932          * its command is submitted and completed. This includes the valid-bit,
 933          * in case you were wondering...
 934          */
 935         if (!rr->verb) {
 936                 dpaa_invalidate_touch_ro(rr);
 937                 return NULL;
 938         }
 939         mc->rridx ^= 1;
 940         mc->vbit ^= QM_MCC_VERB_VBIT;
 941 #ifdef CONFIG_FSL_DPAA_CHECKING
 942         mc->state = qman_mc_idle;
 943 #endif
 944         return rr;
 945 }
 946
 947 static inline int qm_mc_result_timeout(struct qm_portal *portal,
 948                                        union qm_mc_result **mcr)
 949 {
 950         int timeout = QM_MCR_TIMEOUT;
 951
 952         do {
 953                 *mcr = qm_mc_result(portal);
 954                 if (*mcr)
 955                         break;
 956                 udelay(1);
 957         } while (--timeout);
 958
 959         return timeout;
 960 }
 961
 962 static inline void fq_set(struct qman_fq *fq, u32 mask)
 963 {
 964         fq->flags |= mask;
 965 }
 966
 967 static inline void fq_clear(struct qman_fq *fq, u32 mask)
 968 {
 969         fq->flags &= ~mask;
 970 }
 971
 972 static inline int fq_isset(struct qman_fq *fq, u32 mask)
 973 {
 974         return fq->flags & mask;
 975 }
 976
 977 static inline int fq_isclear(struct qman_fq *fq, u32 mask)
 978 {
 979         return !(fq->flags & mask);
 980 }
 981
 982 struct qman_portal {
 983         struct qm_portal p;
 984         /* PORTAL_BITS_*** - dynamic, strictly internal */
 985         unsigned long bits;
 986         /* interrupt sources processed by portal_isr(), configurable */
 987         unsigned long irq_sources;
 988         u32 use_eqcr_ci_stashing;
 989         /* only 1 volatile dequeue at a time */
 990         struct qman_fq *vdqcr_owned;
 991         u32 sdqcr;
 992         /* probing time config params for cpu-affine portals */
 993         const struct qm_portal_config *config;
 994         /* 2-element array. cgrs[0] is mask, cgrs[1] is snapshot. */
 995         struct qman_cgrs *cgrs;
 996         /* linked-list of CSCN handlers. */
 997         struct list_head cgr_cbs;
 998         /* list lock */
 999         spinlock_t cgr_lock;
1000         struct work_struct congestion_work;
1001         struct work_struct mr_work;
1002         char irqname[MAX_IRQNAME];
1003 };
1004
1005 static cpumask_t affine_mask;
1006 static DEFINE_SPINLOCK(affine_mask_lock);
1007 static u16 affine_channels[NR_CPUS];
1008 static DEFINE_PER_CPU(struct qman_portal, qman_affine_portal);
1009 struct qman_portal *affine_portals[NR_CPUS];
1010
1011 static inline struct qman_portal *get_affine_portal(void)
1012 {
1013         return &get_cpu_var(qman_affine_portal);
1014 }
1015
1016 static inline void put_affine_portal(void)
1017 {
1018         put_cpu_var(qman_affine_portal);
1019 }
1020
1021
1022 static inline struct qman_portal *get_portal_for_channel(u16 channel)
1023 {
1024         int i;
1025
1026         for (i = 0; i < num_possible_cpus(); i++) {
1027                 if (affine_portals[i] &&
1028                     affine_portals[i]->config->channel == channel)
1029                         return affine_portals[i];
1030         }
1031
1032         return NULL;
1033 }
1034
1035 static struct workqueue_struct *qm_portal_wq;
1036
1037 int qman_dqrr_set_ithresh(struct qman_portal *portal, u8 ithresh)
1038 {
1039         int res;
1040
1041         if (!portal)
1042                 return -EINVAL;
1043
1044         res = qm_dqrr_set_ithresh(&portal->p, ithresh);
1045         if (res)
1046                 return res;
1047
1048         portal->p.dqrr.ithresh = ithresh;
1049
1050         return 0;
1051 }
1052 EXPORT_SYMBOL(qman_dqrr_set_ithresh);
1053
1054 void qman_dqrr_get_ithresh(struct qman_portal *portal, u8 *ithresh)
1055 {
1056         if (portal && ithresh)
1057                 *ithresh = qm_in(&portal->p, QM_REG_DQRR_ITR);
1058 }
1059 EXPORT_SYMBOL(qman_dqrr_get_ithresh);
1060
1061 void qman_portal_get_iperiod(struct qman_portal *portal, u32 *iperiod)
1062 {
1063         if (portal && iperiod)
1064                 *iperiod = qm_in(&portal->p, QM_REG_ITPR);
1065 }
1066 EXPORT_SYMBOL(qman_portal_get_iperiod);
1067
1068 int qman_portal_set_iperiod(struct qman_portal *portal, u32 iperiod)
1069 {
1070         if (!portal || iperiod > QMAN_ITP_MAX)
1071                 return -EINVAL;
1072
1073         qm_out(&portal->p, QM_REG_ITPR, iperiod);
1074
1075         return 0;
1076 }
1077 EXPORT_SYMBOL(qman_portal_set_iperiod);
1078
1079 int qman_wq_alloc(void)
1080 {
1081         qm_portal_wq = alloc_workqueue("qman_portal_wq", 0, 1);
1082         if (!qm_portal_wq)
1083                 return -ENOMEM;
1084         return 0;
1085 }
1086
1087
1088 void qman_enable_irqs(void)
1089 {
1090         int i;
1091
1092         for (i = 0; i < num_possible_cpus(); i++) {
1093                 if (affine_portals[i]) {
1094                         qm_out(&affine_portals[i]->p, QM_REG_ISR, 0xffffffff);
1095                         qm_out(&affine_portals[i]->p, QM_REG_IIR, 0);
1096                 }
1097
1098         }
1099 }
1100
1101 /*
1102  * This is what everything can wait on, even if it migrates to a different cpu
1103  * to the one whose affine portal it is waiting on.
1104  */
1105 static DECLARE_WAIT_QUEUE_HEAD(affine_queue);
1106
1107 static struct qman_fq **fq_table;
1108 static u32 num_fqids;
1109
1110 int qman_alloc_fq_table(u32 _num_fqids)
1111 {
1112         num_fqids = _num_fqids;
1113
1114         fq_table = vzalloc(array3_size(sizeof(struct qman_fq *),
1115                                        num_fqids, 2));
1116         if (!fq_table)
1117                 return -ENOMEM;
1118
1119         pr_debug("Allocated fq lookup table at %p, entry count %u\n",
1120                  fq_table, num_fqids * 2);
1121         return 0;
1122 }
1123
1124 static struct qman_fq *idx_to_fq(u32 idx)
1125 {
1126         struct qman_fq *fq;
1127
1128 #ifdef CONFIG_FSL_DPAA_CHECKING
1129         if (WARN_ON(idx >= num_fqids * 2))
1130                 return NULL;
1131 #endif
1132         fq = fq_table[idx];
1133         DPAA_ASSERT(!fq || idx == fq->idx);
1134
1135         return fq;
1136 }
1137
1138 /*
1139  * Only returns full-service fq objects, not enqueue-only
1140  * references (QMAN_FQ_FLAG_NO_MODIFY).
1141  */
1142 static struct qman_fq *fqid_to_fq(u32 fqid)
1143 {
1144         return idx_to_fq(fqid * 2);
1145 }
1146
1147 static struct qman_fq *tag_to_fq(u32 tag)
1148 {
1149 #if BITS_PER_LONG == 64
1150         return idx_to_fq(tag);
1151 #else
1152         return (struct qman_fq *)tag;
1153 #endif
1154 }
1155
1156 static u32 fq_to_tag(struct qman_fq *fq)
1157 {
1158 #if BITS_PER_LONG == 64
1159         return fq->idx;
1160 #else
1161         return (u32)fq;
1162 #endif
1163 }
1164
1165 static u32 __poll_portal_slow(struct qman_portal *p, u32 is);
1166 static inline unsigned int __poll_portal_fast(struct qman_portal *p,
1167                                         unsigned int poll_limit);
1168 static void qm_congestion_task(struct work_struct *work);
1169 static void qm_mr_process_task(struct work_struct *work);
1170
1171 static irqreturn_t portal_isr(int irq, void *ptr)
1172 {
1173         struct qman_portal *p = ptr;
1174         u32 is = qm_in(&p->p, QM_REG_ISR) & p->irq_sources;
1175         u32 clear = 0;
1176
1177         if (unlikely(!is))
1178                 return IRQ_NONE;
1179
1180         /* DQRR-handling if it's interrupt-driven */
1181         if (is & QM_PIRQ_DQRI) {
1182                 __poll_portal_fast(p, QMAN_POLL_LIMIT);
1183                 clear = QM_DQAVAIL_MASK | QM_PIRQ_DQRI;
1184         }
1185         /* Handling of anything else that's interrupt-driven */
1186         clear |= __poll_portal_slow(p, is) & QM_PIRQ_SLOW;
1187         qm_out(&p->p, QM_REG_ISR, clear);
1188         return IRQ_HANDLED;
1189 }
1190
1191 static int drain_mr_fqrni(struct qm_portal *p)
1192 {
1193         const union qm_mr_entry *msg;
1194 loop:
1195         qm_mr_pvb_update(p);
1196         msg = qm_mr_current(p);
1197         if (!msg) {
1198                 /*
1199                  * if MR was full and h/w had other FQRNI entries to produce, we
1200                  * need to allow it time to produce those entries once the
1201                  * existing entries are consumed. A worst-case situation
1202                  * (fully-loaded system) means h/w sequencers may have to do 3-4
1203                  * other things before servicing the portal's MR pump, each of
1204                  * which (if slow) may take ~50 qman cycles (which is ~200
1205                  * processor cycles). So rounding up and then multiplying this
1206                  * worst-case estimate by a factor of 10, just to be
1207                  * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
1208                  * one entry at a time, so h/w has an opportunity to produce new
1209                  * entries well before the ring has been fully consumed, so
1210                  * we're being *really* paranoid here.
1211                  */
1212                 mdelay(1);
1213                 qm_mr_pvb_update(p);
1214                 msg = qm_mr_current(p);
1215                 if (!msg)
1216                         return 0;
1217         }
1218         if ((msg->verb & QM_MR_VERB_TYPE_MASK) != QM_MR_VERB_FQRNI) {
1219                 /* We aren't draining anything but FQRNIs */
1220                 pr_err("Found verb 0x%x in MR\n", msg->verb);
1221                 return -1;
1222         }
1223         qm_mr_next(p);
1224         qm_mr_cci_consume(p, 1);
1225         goto loop;
1226 }
1227
1228 static int qman_create_portal(struct qman_portal *portal,
1229                               const struct qm_portal_config *c,
1230                               const struct qman_cgrs *cgrs)
1231 {
1232         struct qm_portal *p;
1233         int ret;
1234         u32 isdr;
1235
1236         p = &portal->p;
1237
1238 #ifdef CONFIG_FSL_PAMU
1239         /* PAMU is required for stashing */
1240         portal->use_eqcr_ci_stashing = ((qman_ip_rev >= QMAN_REV30) ? 1 : 0);
1241 #else
1242         portal->use_eqcr_ci_stashing = 0;
1243 #endif
1244         /*
1245          * prep the low-level portal struct with the mapped addresses from the
1246          * config, everything that follows depends on it and "config" is more
1247          * for (de)reference
1248          */
1249         p->addr.ce = c->addr_virt_ce;
1250         p->addr.ce_be = c->addr_virt_ce;
1251         p->addr.ci = c->addr_virt_ci;
1252         /*
1253          * If CI-stashing is used, the current defaults use a threshold of 3,
1254          * and stash with high-than-DQRR priority.
1255          */
1256         if (qm_eqcr_init(p, qm_eqcr_pvb,
1257                         portal->use_eqcr_ci_stashing ? 3 : 0, 1)) {
1258                 dev_err(c->dev, "EQCR initialisation failed\n");
1259                 goto fail_eqcr;
1260         }
1261         if (qm_dqrr_init(p, c, qm_dqrr_dpush, qm_dqrr_pvb,
1262                         qm_dqrr_cdc, DQRR_MAXFILL)) {
1263                 dev_err(c->dev, "DQRR initialisation failed\n");
1264                 goto fail_dqrr;
1265         }
1266         if (qm_mr_init(p, qm_mr_pvb, qm_mr_cci)) {
1267                 dev_err(c->dev, "MR initialisation failed\n");
1268                 goto fail_mr;
1269         }
1270         if (qm_mc_init(p)) {
1271                 dev_err(c->dev, "MC initialisation failed\n");
1272                 goto fail_mc;
1273         }
1274         /* static interrupt-gating controls */
1275         qm_dqrr_set_ithresh(p, QMAN_PIRQ_DQRR_ITHRESH);
1276         qm_mr_set_ithresh(p, QMAN_PIRQ_MR_ITHRESH);
1277         qm_out(p, QM_REG_ITPR, QMAN_PIRQ_IPERIOD);
1278         portal->cgrs = kmalloc_array(2, sizeof(*cgrs), GFP_KERNEL);
1279         if (!portal->cgrs)
1280                 goto fail_cgrs;
1281         /* initial snapshot is no-depletion */
1282         qman_cgrs_init(&portal->cgrs[1]);
1283         if (cgrs)
1284                 portal->cgrs[0] = *cgrs;
1285         else
1286                 /* if the given mask is NULL, assume all CGRs can be seen */
1287                 qman_cgrs_fill(&portal->cgrs[0]);
1288         INIT_LIST_HEAD(&portal->cgr_cbs);
1289         spin_lock_init(&portal->cgr_lock);
1290         INIT_WORK(&portal->congestion_work, qm_congestion_task);
1291         INIT_WORK(&portal->mr_work, qm_mr_process_task);
1292         portal->bits = 0;
1293         portal->sdqcr = QM_SDQCR_SOURCE_CHANNELS | QM_SDQCR_COUNT_UPTO3 |
1294                         QM_SDQCR_DEDICATED_PRECEDENCE | QM_SDQCR_TYPE_PRIO_QOS |
1295                         QM_SDQCR_TOKEN_SET(0xab) | QM_SDQCR_CHANNELS_DEDICATED;
1296         isdr = 0xffffffff;
1297         qm_out(p, QM_REG_ISDR, isdr);
1298         portal->irq_sources = 0;
1299         qm_out(p, QM_REG_IER, 0);
1300         snprintf(portal->irqname, MAX_IRQNAME, IRQNAME, c->cpu);
1301         qm_out(p, QM_REG_IIR, 1);
1302         if (request_irq(c->irq, portal_isr, 0, portal->irqname, portal)) {
1303                 dev_err(c->dev, "request_irq() failed\n");
1304                 goto fail_irq;
1305         }
1306
1307         if (dpaa_set_portal_irq_affinity(c->dev, c->irq, c->cpu))
1308                 goto fail_affinity;
1309
1310         /* Need EQCR to be empty before continuing */
1311         isdr &= ~QM_PIRQ_EQCI;
1312         qm_out(p, QM_REG_ISDR, isdr);
1313         ret = qm_eqcr_get_fill(p);
1314         if (ret) {
1315                 dev_err(c->dev, "EQCR unclean\n");
1316                 goto fail_eqcr_empty;
1317         }
1318         isdr &= ~(QM_PIRQ_DQRI | QM_PIRQ_MRI);
1319         qm_out(p, QM_REG_ISDR, isdr);
1320         if (qm_dqrr_current(p)) {
1321                 dev_dbg(c->dev, "DQRR unclean\n");
1322                 qm_dqrr_cdc_consume_n(p, 0xffff);
1323         }
1324         if (qm_mr_current(p) && drain_mr_fqrni(p)) {
1325                 /* special handling, drain just in case it's a few FQRNIs */
1326                 const union qm_mr_entry *e = qm_mr_current(p);
1327
1328                 dev_err(c->dev, "MR dirty, VB 0x%x, rc 0x%x, addr 0x%llx\n",
1329                         e->verb, e->ern.rc, qm_fd_addr_get64(&e->ern.fd));
1330                 goto fail_dqrr_mr_empty;
1331         }
1332         /* Success */
1333         portal->config = c;
1334         qm_out(p, QM_REG_ISR, 0xffffffff);
1335         qm_out(p, QM_REG_ISDR, 0);
1336         if (!qman_requires_cleanup())
1337                 qm_out(p, QM_REG_IIR, 0);
1338         /* Write a sane SDQCR */
1339         qm_dqrr_sdqcr_set(p, portal->sdqcr);
1340         return 0;
1341
1342 fail_dqrr_mr_empty:
1343 fail_eqcr_empty:
1344 fail_affinity:
1345         free_irq(c->irq, portal);
1346 fail_irq:
1347         kfree(portal->cgrs);
1348 fail_cgrs:
1349         qm_mc_finish(p);
1350 fail_mc:
1351         qm_mr_finish(p);
1352 fail_mr:
1353         qm_dqrr_finish(p);
1354 fail_dqrr:
1355         qm_eqcr_finish(p);
1356 fail_eqcr:
1357         return -EIO;
1358 }
1359
1360 struct qman_portal *qman_create_affine_portal(const struct qm_portal_config *c,
1361                                               const struct qman_cgrs *cgrs)
1362 {
1363         struct qman_portal *portal;
1364         int err;
1365
1366         portal = &per_cpu(qman_affine_portal, c->cpu);
1367         err = qman_create_portal(portal, c, cgrs);
1368         if (err)
1369                 return NULL;
1370
1371         spin_lock(&affine_mask_lock);
1372         cpumask_set_cpu(c->cpu, &affine_mask);
1373         affine_channels[c->cpu] = c->channel;
1374         affine_portals[c->cpu] = portal;
1375         spin_unlock(&affine_mask_lock);
1376
1377         return portal;
1378 }
1379
1380 static void qman_destroy_portal(struct qman_portal *qm)
1381 {
1382         const struct qm_portal_config *pcfg;
1383
1384         /* Stop dequeues on the portal */
1385         qm_dqrr_sdqcr_set(&qm->p, 0);
1386
1387         /*
1388          * NB we do this to "quiesce" EQCR. If we add enqueue-completions or
1389          * something related to QM_PIRQ_EQCI, this may need fixing.
1390          * Also, due to the prefetching model used for CI updates in the enqueue
1391          * path, this update will only invalidate the CI cacheline *after*
1392          * working on it, so we need to call this twice to ensure a full update
1393          * irrespective of where the enqueue processing was at when the teardown
1394          * began.
1395          */
1396         qm_eqcr_cce_update(&qm->p);
1397         qm_eqcr_cce_update(&qm->p);
1398         pcfg = qm->config;
1399
1400         free_irq(pcfg->irq, qm);
1401
1402         kfree(qm->cgrs);
1403         qm_mc_finish(&qm->p);
1404         qm_mr_finish(&qm->p);
1405         qm_dqrr_finish(&qm->p);
1406         qm_eqcr_finish(&qm->p);
1407
1408         qm->config = NULL;
1409 }
1410
1411 const struct qm_portal_config *qman_destroy_affine_portal(void)
1412 {
1413         struct qman_portal *qm = get_affine_portal();
1414         const struct qm_portal_config *pcfg;
1415         int cpu;
1416
1417         pcfg = qm->config;
1418         cpu = pcfg->cpu;
1419
1420         qman_destroy_portal(qm);
1421
1422         spin_lock(&affine_mask_lock);
1423         cpumask_clear_cpu(cpu, &affine_mask);
1424         spin_unlock(&affine_mask_lock);
1425         put_affine_portal();
1426         return pcfg;
1427 }
1428
1429 /* Inline helper to reduce nesting in __poll_portal_slow() */
1430 static inline void fq_state_change(struct qman_portal *p, struct qman_fq *fq,
1431                                    const union qm_mr_entry *msg, u8 verb)
1432 {
1433         switch (verb) {
1434         case QM_MR_VERB_FQRL:
1435                 DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_ORL));
1436                 fq_clear(fq, QMAN_FQ_STATE_ORL);
1437                 break;
1438         case QM_MR_VERB_FQRN:
1439                 DPAA_ASSERT(fq->state == qman_fq_state_parked ||
1440                             fq->state == qman_fq_state_sched);
1441                 DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_CHANGING));
1442                 fq_clear(fq, QMAN_FQ_STATE_CHANGING);
1443                 if (msg->fq.fqs & QM_MR_FQS_NOTEMPTY)
1444                         fq_set(fq, QMAN_FQ_STATE_NE);
1445                 if (msg->fq.fqs & QM_MR_FQS_ORLPRESENT)
1446                         fq_set(fq, QMAN_FQ_STATE_ORL);
1447                 fq->state = qman_fq_state_retired;
1448                 break;
1449         case QM_MR_VERB_FQPN:
1450                 DPAA_ASSERT(fq->state == qman_fq_state_sched);
1451                 DPAA_ASSERT(fq_isclear(fq, QMAN_FQ_STATE_CHANGING));
1452                 fq->state = qman_fq_state_parked;
1453         }
1454 }
1455
1456 static void qm_congestion_task(struct work_struct *work)
1457 {
1458         struct qman_portal *p = container_of(work, struct qman_portal,
1459                                              congestion_work);
1460         struct qman_cgrs rr, c;
1461         union qm_mc_result *mcr;
1462         struct qman_cgr *cgr;
1463
1464         spin_lock(&p->cgr_lock);
1465         qm_mc_start(&p->p);
1466         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCONGESTION);
1467         if (!qm_mc_result_timeout(&p->p, &mcr)) {
1468                 spin_unlock(&p->cgr_lock);
1469                 dev_crit(p->config->dev, "QUERYCONGESTION timeout\n");
1470                 qman_p_irqsource_add(p, QM_PIRQ_CSCI);
1471                 return;
1472         }
1473         /* mask out the ones I'm not interested in */
1474         qman_cgrs_and(&rr, (struct qman_cgrs *)&mcr->querycongestion.state,
1475                       &p->cgrs[0]);
1476         /* check previous snapshot for delta, enter/exit congestion */
1477         qman_cgrs_xor(&c, &rr, &p->cgrs[1]);
1478         /* update snapshot */
1479         qman_cgrs_cp(&p->cgrs[1], &rr);
1480         /* Invoke callback */
1481         list_for_each_entry(cgr, &p->cgr_cbs, node)
1482                 if (cgr->cb && qman_cgrs_get(&c, cgr->cgrid))
1483                         cgr->cb(p, cgr, qman_cgrs_get(&rr, cgr->cgrid));
1484         spin_unlock(&p->cgr_lock);
1485         qman_p_irqsource_add(p, QM_PIRQ_CSCI);
1486 }
1487
1488 static void qm_mr_process_task(struct work_struct *work)
1489 {
1490         struct qman_portal *p = container_of(work, struct qman_portal,
1491                                              mr_work);
1492         const union qm_mr_entry *msg;
1493         struct qman_fq *fq;
1494         u8 verb, num = 0;
1495
1496         preempt_disable();
1497
1498         while (1) {
1499                 qm_mr_pvb_update(&p->p);
1500                 msg = qm_mr_current(&p->p);
1501                 if (!msg)
1502                         break;
1503
1504                 verb = msg->verb & QM_MR_VERB_TYPE_MASK;
1505                 /* The message is a software ERN iff the 0x20 bit is clear */
1506                 if (verb & 0x20) {
1507                         switch (verb) {
1508                         case QM_MR_VERB_FQRNI:
1509                                 /* nada, we drop FQRNIs on the floor */
1510                                 break;
1511                         case QM_MR_VERB_FQRN:
1512                         case QM_MR_VERB_FQRL:
1513                                 /* Lookup in the retirement table */
1514                                 fq = fqid_to_fq(qm_fqid_get(&msg->fq));
1515                                 if (WARN_ON(!fq))
1516                                         break;
1517                                 fq_state_change(p, fq, msg, verb);
1518                                 if (fq->cb.fqs)
1519                                         fq->cb.fqs(p, fq, msg);
1520                                 break;
1521                         case QM_MR_VERB_FQPN:
1522                                 /* Parked */
1523                                 fq = tag_to_fq(be32_to_cpu(msg->fq.context_b));
1524                                 fq_state_change(p, fq, msg, verb);
1525                                 if (fq->cb.fqs)
1526                                         fq->cb.fqs(p, fq, msg);
1527                                 break;
1528                         case QM_MR_VERB_DC_ERN:
1529                                 /* DCP ERN */
1530                                 pr_crit_once("Leaking DCP ERNs!\n");
1531                                 break;
1532                         default:
1533                                 pr_crit("Invalid MR verb 0x%02x\n", verb);
1534                         }
1535                 } else {
1536                         /* Its a software ERN */
1537                         fq = tag_to_fq(be32_to_cpu(msg->ern.tag));
1538                         fq->cb.ern(p, fq, msg);
1539                 }
1540                 num++;
1541                 qm_mr_next(&p->p);
1542         }
1543
1544         qm_mr_cci_consume(&p->p, num);
1545         qman_p_irqsource_add(p, QM_PIRQ_MRI);
1546         preempt_enable();
1547 }
1548
1549 static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
1550 {
1551         if (is & QM_PIRQ_CSCI) {
1552                 qman_p_irqsource_remove(p, QM_PIRQ_CSCI);
1553                 queue_work_on(smp_processor_id(), qm_portal_wq,
1554                               &p->congestion_work);
1555         }
1556
1557         if (is & QM_PIRQ_EQRI) {
1558                 qm_eqcr_cce_update(&p->p);
1559                 qm_eqcr_set_ithresh(&p->p, 0);
1560                 wake_up(&affine_queue);
1561         }
1562
1563         if (is & QM_PIRQ_MRI) {
1564                 qman_p_irqsource_remove(p, QM_PIRQ_MRI);
1565                 queue_work_on(smp_processor_id(), qm_portal_wq,
1566                               &p->mr_work);
1567         }
1568
1569         return is;
1570 }
1571
1572 /*
1573  * remove some slowish-path stuff from the "fast path" and make sure it isn't
1574  * inlined.
1575  */
1576 static noinline void clear_vdqcr(struct qman_portal *p, struct qman_fq *fq)
1577 {
1578         p->vdqcr_owned = NULL;
1579         fq_clear(fq, QMAN_FQ_STATE_VDQCR);
1580         wake_up(&affine_queue);
1581 }
1582
1583 /*
1584  * The only states that would conflict with other things if they ran at the
1585  * same time on the same cpu are:
1586  *
1587  *   (i) setting/clearing vdqcr_owned, and
1588  *  (ii) clearing the NE (Not Empty) flag.
1589  *
1590  * Both are safe. Because;
1591  *
1592  *   (i) this clearing can only occur after qman_volatile_dequeue() has set the
1593  *       vdqcr_owned field (which it does before setting VDQCR), and
1594  *       qman_volatile_dequeue() blocks interrupts and preemption while this is
1595  *       done so that we can't interfere.
1596  *  (ii) the NE flag is only cleared after qman_retire_fq() has set it, and as
1597  *       with (i) that API prevents us from interfering until it's safe.
1598  *
1599  * The good thing is that qman_volatile_dequeue() and qman_retire_fq() run far
1600  * less frequently (ie. per-FQ) than __poll_portal_fast() does, so the nett
1601  * advantage comes from this function not having to "lock" anything at all.
1602  *
1603  * Note also that the callbacks are invoked at points which are safe against the
1604  * above potential conflicts, but that this function itself is not re-entrant
1605  * (this is because the function tracks one end of each FIFO in the portal and
1606  * we do *not* want to lock that). So the consequence is that it is safe for
1607  * user callbacks to call into any QMan API.
1608  */
1609 static inline unsigned int __poll_portal_fast(struct qman_portal *p,
1610                                         unsigned int poll_limit)
1611 {
1612         const struct qm_dqrr_entry *dq;
1613         struct qman_fq *fq;
1614         enum qman_cb_dqrr_result res;
1615         unsigned int limit = 0;
1616
1617         do {
1618                 qm_dqrr_pvb_update(&p->p);
1619                 dq = qm_dqrr_current(&p->p);
1620                 if (!dq)
1621                         break;
1622
1623                 if (dq->stat & QM_DQRR_STAT_UNSCHEDULED) {
1624                         /*
1625                          * VDQCR: don't trust context_b as the FQ may have
1626                          * been configured for h/w consumption and we're
1627                          * draining it post-retirement.
1628                          */
1629                         fq = p->vdqcr_owned;
1630                         /*
1631                          * We only set QMAN_FQ_STATE_NE when retiring, so we
1632                          * only need to check for clearing it when doing
1633                          * volatile dequeues.  It's one less thing to check
1634                          * in the critical path (SDQCR).
1635                          */
1636                         if (dq->stat & QM_DQRR_STAT_FQ_EMPTY)
1637                                 fq_clear(fq, QMAN_FQ_STATE_NE);
1638                         /*
1639                          * This is duplicated from the SDQCR code, but we
1640                          * have stuff to do before *and* after this callback,
1641                          * and we don't want multiple if()s in the critical
1642                          * path (SDQCR).
1643                          */
1644                         res = fq->cb.dqrr(p, fq, dq);
1645                         if (res == qman_cb_dqrr_stop)
1646                                 break;
1647                         /* Check for VDQCR completion */
1648                         if (dq->stat & QM_DQRR_STAT_DQCR_EXPIRED)
1649                                 clear_vdqcr(p, fq);
1650                 } else {
1651                         /* SDQCR: context_b points to the FQ */
1652                         fq = tag_to_fq(be32_to_cpu(dq->context_b));
1653                         /* Now let the callback do its stuff */
1654                         res = fq->cb.dqrr(p, fq, dq);
1655                         /*
1656                          * The callback can request that we exit without
1657                          * consuming this entry nor advancing;
1658                          */
1659                         if (res == qman_cb_dqrr_stop)
1660                                 break;
1661                 }
1662                 /* Interpret 'dq' from a driver perspective. */
1663                 /*
1664                  * Parking isn't possible unless HELDACTIVE was set. NB,
1665                  * FORCEELIGIBLE implies HELDACTIVE, so we only need to
1666                  * check for HELDACTIVE to cover both.
1667                  */
1668                 DPAA_ASSERT((dq->stat & QM_DQRR_STAT_FQ_HELDACTIVE) ||
1669                             (res != qman_cb_dqrr_park));
1670                 /* just means "skip it, I'll consume it myself later on" */
1671                 if (res != qman_cb_dqrr_defer)
1672                         qm_dqrr_cdc_consume_1ptr(&p->p, dq,
1673                                                  res == qman_cb_dqrr_park);
1674                 /* Move forward */
1675                 qm_dqrr_next(&p->p);
1676                 /*
1677                  * Entry processed and consumed, increment our counter.  The
1678                  * callback can request that we exit after consuming the
1679                  * entry, and we also exit if we reach our processing limit,
1680                  * so loop back only if neither of these conditions is met.
1681                  */
1682         } while (++limit < poll_limit && res != qman_cb_dqrr_consume_stop);
1683
1684         return limit;
1685 }
1686
1687 void qman_p_irqsource_add(struct qman_portal *p, u32 bits)
1688 {
1689         unsigned long irqflags;
1690
1691         local_irq_save(irqflags);
1692         p->irq_sources |= bits & QM_PIRQ_VISIBLE;
1693         qm_out(&p->p, QM_REG_IER, p->irq_sources);
1694         local_irq_restore(irqflags);
1695 }
1696 EXPORT_SYMBOL(qman_p_irqsource_add);
1697
1698 void qman_p_irqsource_remove(struct qman_portal *p, u32 bits)
1699 {
1700         unsigned long irqflags;
1701         u32 ier;
1702
1703         /*
1704          * Our interrupt handler only processes+clears status register bits that
1705          * are in p->irq_sources. As we're trimming that mask, if one of them
1706          * were to assert in the status register just before we remove it from
1707          * the enable register, there would be an interrupt-storm when we
1708          * release the IRQ lock. So we wait for the enable register update to
1709          * take effect in h/w (by reading it back) and then clear all other bits
1710          * in the status register. Ie. we clear them from ISR once it's certain
1711          * IER won't allow them to reassert.
1712          */
1713         local_irq_save(irqflags);
1714         bits &= QM_PIRQ_VISIBLE;
1715         p->irq_sources &= ~bits;
1716         qm_out(&p->p, QM_REG_IER, p->irq_sources);
1717         ier = qm_in(&p->p, QM_REG_IER);
1718         /*
1719          * Using "~ier" (rather than "bits" or "~p->irq_sources") creates a
1720          * data-dependency, ie. to protect against re-ordering.
1721          */
1722         qm_out(&p->p, QM_REG_ISR, ~ier);
1723         local_irq_restore(irqflags);
1724 }
1725 EXPORT_SYMBOL(qman_p_irqsource_remove);
1726
1727 const cpumask_t *qman_affine_cpus(void)
1728 {
1729         return &affine_mask;
1730 }
1731 EXPORT_SYMBOL(qman_affine_cpus);
1732
1733 u16 qman_affine_channel(int cpu)
1734 {
1735         if (cpu < 0) {
1736                 struct qman_portal *portal = get_affine_portal();
1737
1738                 cpu = portal->config->cpu;
1739                 put_affine_portal();
1740         }
1741         WARN_ON(!cpumask_test_cpu(cpu, &affine_mask));
1742         return affine_channels[cpu];
1743 }
1744 EXPORT_SYMBOL(qman_affine_channel);
1745
1746 struct qman_portal *qman_get_affine_portal(int cpu)
1747 {
1748         return affine_portals[cpu];
1749 }
1750 EXPORT_SYMBOL(qman_get_affine_portal);
1751
1752 int qman_start_using_portal(struct qman_portal *p, struct device *dev)
1753 {
1754         return (!device_link_add(dev, p->config->dev,
1755                                  DL_FLAG_AUTOREMOVE_CONSUMER)) ? -EINVAL : 0;
1756 }
1757 EXPORT_SYMBOL(qman_start_using_portal);
1758
1759 void qman_stop_using_portal(struct qman_portal *p, struct device *dev)
1760 {
1761         device_link_remove(dev, p->config->dev);
1762 }
1763 EXPORT_SYMBOL(qman_stop_using_portal);
1764
1765 int qman_p_poll_dqrr(struct qman_portal *p, unsigned int limit)
1766 {
1767         return __poll_portal_fast(p, limit);
1768 }
1769 EXPORT_SYMBOL(qman_p_poll_dqrr);
1770
1771 void qman_p_static_dequeue_add(struct qman_portal *p, u32 pools)
1772 {
1773         unsigned long irqflags;
1774
1775         local_irq_save(irqflags);
1776         pools &= p->config->pools;
1777         p->sdqcr |= pools;
1778         qm_dqrr_sdqcr_set(&p->p, p->sdqcr);
1779         local_irq_restore(irqflags);
1780 }
1781 EXPORT_SYMBOL(qman_p_static_dequeue_add);
1782
1783 /* Frame queue API */
1784
1785 static const char *mcr_result_str(u8 result)
1786 {
1787         switch (result) {
1788         case QM_MCR_RESULT_NULL:
1789                 return "QM_MCR_RESULT_NULL";
1790         case QM_MCR_RESULT_OK:
1791                 return "QM_MCR_RESULT_OK";
1792         case QM_MCR_RESULT_ERR_FQID:
1793                 return "QM_MCR_RESULT_ERR_FQID";
1794         case QM_MCR_RESULT_ERR_FQSTATE:
1795                 return "QM_MCR_RESULT_ERR_FQSTATE";
1796         case QM_MCR_RESULT_ERR_NOTEMPTY:
1797                 return "QM_MCR_RESULT_ERR_NOTEMPTY";
1798         case QM_MCR_RESULT_PENDING:
1799                 return "QM_MCR_RESULT_PENDING";
1800         case QM_MCR_RESULT_ERR_BADCOMMAND:
1801                 return "QM_MCR_RESULT_ERR_BADCOMMAND";
1802         }
1803         return "<unknown MCR result>";
1804 }
1805
1806 int qman_create_fq(u32 fqid, u32 flags, struct qman_fq *fq)
1807 {
1808         if (flags & QMAN_FQ_FLAG_DYNAMIC_FQID) {
1809                 int ret = qman_alloc_fqid(&fqid);
1810
1811                 if (ret)
1812                         return ret;
1813         }
1814         fq->fqid = fqid;
1815         fq->flags = flags;
1816         fq->state = qman_fq_state_oos;
1817         fq->cgr_groupid = 0;
1818
1819         /* A context_b of 0 is allegedly special, so don't use that fqid */
1820         if (fqid == 0 || fqid >= num_fqids) {
1821                 WARN(1, "bad fqid %d\n", fqid);
1822                 return -EINVAL;
1823         }
1824
1825         fq->idx = fqid * 2;
1826         if (flags & QMAN_FQ_FLAG_NO_MODIFY)
1827                 fq->idx++;
1828
1829         WARN_ON(fq_table[fq->idx]);
1830         fq_table[fq->idx] = fq;
1831
1832         return 0;
1833 }
1834 EXPORT_SYMBOL(qman_create_fq);
1835
1836 void qman_destroy_fq(struct qman_fq *fq)
1837 {
1838         /*
1839          * We don't need to lock the FQ as it is a pre-condition that the FQ be
1840          * quiesced. Instead, run some checks.
1841          */
1842         switch (fq->state) {
1843         case qman_fq_state_parked:
1844         case qman_fq_state_oos:
1845                 if (fq_isset(fq, QMAN_FQ_FLAG_DYNAMIC_FQID))
1846                         qman_release_fqid(fq->fqid);
1847
1848                 DPAA_ASSERT(fq_table[fq->idx]);
1849                 fq_table[fq->idx] = NULL;
1850                 return;
1851         default:
1852                 break;
1853         }
1854         DPAA_ASSERT(NULL == "qman_free_fq() on unquiesced FQ!");
1855 }
1856 EXPORT_SYMBOL(qman_destroy_fq);
1857
1858 u32 qman_fq_fqid(struct qman_fq *fq)
1859 {
1860         return fq->fqid;
1861 }
1862 EXPORT_SYMBOL(qman_fq_fqid);
1863
1864 int qman_init_fq(struct qman_fq *fq, u32 flags, struct qm_mcc_initfq *opts)
1865 {
1866         union qm_mc_command *mcc;
1867         union qm_mc_result *mcr;
1868         struct qman_portal *p;
1869         u8 res, myverb;
1870         int ret = 0;
1871
1872         myverb = (flags & QMAN_INITFQ_FLAG_SCHED)
1873                 ? QM_MCC_VERB_INITFQ_SCHED : QM_MCC_VERB_INITFQ_PARKED;
1874
1875         if (fq->state != qman_fq_state_oos &&
1876             fq->state != qman_fq_state_parked)
1877                 return -EINVAL;
1878 #ifdef CONFIG_FSL_DPAA_CHECKING
1879         if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
1880                 return -EINVAL;
1881 #endif
1882         if (opts && (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_OAC)) {
1883                 /* And can't be set at the same time as TDTHRESH */
1884                 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_TDTHRESH)
1885                         return -EINVAL;
1886         }
1887         /* Issue an INITFQ_[PARKED|SCHED] management command */
1888         p = get_affine_portal();
1889         if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
1890             (fq->state != qman_fq_state_oos &&
1891              fq->state != qman_fq_state_parked)) {
1892                 ret = -EBUSY;
1893                 goto out;
1894         }
1895         mcc = qm_mc_start(&p->p);
1896         if (opts)
1897                 mcc->initfq = *opts;
1898         qm_fqid_set(&mcc->fq, fq->fqid);
1899         mcc->initfq.count = 0;
1900         /*
1901          * If the FQ does *not* have the TO_DCPORTAL flag, context_b is set as a
1902          * demux pointer. Otherwise, the caller-provided value is allowed to
1903          * stand, don't overwrite it.
1904          */
1905         if (fq_isclear(fq, QMAN_FQ_FLAG_TO_DCPORTAL)) {
1906                 dma_addr_t phys_fq;
1907
1908                 mcc->initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CONTEXTB);
1909                 mcc->initfq.fqd.context_b = cpu_to_be32(fq_to_tag(fq));
1910                 /*
1911                  *  and the physical address - NB, if the user wasn't trying to
1912                  * set CONTEXTA, clear the stashing settings.
1913                  */
1914                 if (!(be16_to_cpu(mcc->initfq.we_mask) &
1915                                   QM_INITFQ_WE_CONTEXTA)) {
1916                         mcc->initfq.we_mask |=
1917                                 cpu_to_be16(QM_INITFQ_WE_CONTEXTA);
1918                         memset(&mcc->initfq.fqd.context_a, 0,
1919                                 sizeof(mcc->initfq.fqd.context_a));
1920                 } else {
1921                         struct qman_portal *p = qman_dma_portal;
1922
1923                         phys_fq = dma_map_single(p->config->dev, fq,
1924                                                  sizeof(*fq), DMA_TO_DEVICE);
1925                         if (dma_mapping_error(p->config->dev, phys_fq)) {
1926                                 dev_err(p->config->dev, "dma_mapping failed\n");
1927                                 ret = -EIO;
1928                                 goto out;
1929                         }
1930
1931                         qm_fqd_stashing_set64(&mcc->initfq.fqd, phys_fq);
1932                 }
1933         }
1934         if (flags & QMAN_INITFQ_FLAG_LOCAL) {
1935                 int wq = 0;
1936
1937                 if (!(be16_to_cpu(mcc->initfq.we_mask) &
1938                                   QM_INITFQ_WE_DESTWQ)) {
1939                         mcc->initfq.we_mask |=
1940                                 cpu_to_be16(QM_INITFQ_WE_DESTWQ);
1941                         wq = 4;
1942                 }
1943                 qm_fqd_set_destwq(&mcc->initfq.fqd, p->config->channel, wq);
1944         }
1945         qm_mc_commit(&p->p, myverb);
1946         if (!qm_mc_result_timeout(&p->p, &mcr)) {
1947                 dev_err(p->config->dev, "MCR timeout\n");
1948                 ret = -ETIMEDOUT;
1949                 goto out;
1950         }
1951
1952         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);
1953         res = mcr->result;
1954         if (res != QM_MCR_RESULT_OK) {
1955                 ret = -EIO;
1956                 goto out;
1957         }
1958         if (opts) {
1959                 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_FQCTRL) {
1960                         if (be16_to_cpu(opts->fqd.fq_ctrl) & QM_FQCTRL_CGE)
1961                                 fq_set(fq, QMAN_FQ_STATE_CGR_EN);
1962                         else
1963                                 fq_clear(fq, QMAN_FQ_STATE_CGR_EN);
1964                 }
1965                 if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_CGID)
1966                         fq->cgr_groupid = opts->fqd.cgid;
1967         }
1968         fq->state = (flags & QMAN_INITFQ_FLAG_SCHED) ?
1969                 qman_fq_state_sched : qman_fq_state_parked;
1970
1971 out:
1972         put_affine_portal();
1973         return ret;
1974 }
1975 EXPORT_SYMBOL(qman_init_fq);
1976
1977 int qman_schedule_fq(struct qman_fq *fq)
1978 {
1979         union qm_mc_command *mcc;
1980         union qm_mc_result *mcr;
1981         struct qman_portal *p;
1982         int ret = 0;
1983
1984         if (fq->state != qman_fq_state_parked)
1985                 return -EINVAL;
1986 #ifdef CONFIG_FSL_DPAA_CHECKING
1987         if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
1988                 return -EINVAL;
1989 #endif
1990         /* Issue a ALTERFQ_SCHED management command */
1991         p = get_affine_portal();
1992         if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
1993             fq->state != qman_fq_state_parked) {
1994                 ret = -EBUSY;
1995                 goto out;
1996         }
1997         mcc = qm_mc_start(&p->p);
1998         qm_fqid_set(&mcc->fq, fq->fqid);
1999         qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_SCHED);
2000         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2001                 dev_err(p->config->dev, "ALTER_SCHED timeout\n");
2002                 ret = -ETIMEDOUT;
2003                 goto out;
2004         }
2005
2006         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_SCHED);
2007         if (mcr->result != QM_MCR_RESULT_OK) {
2008                 ret = -EIO;
2009                 goto out;
2010         }
2011         fq->state = qman_fq_state_sched;
2012 out:
2013         put_affine_portal();
2014         return ret;
2015 }
2016 EXPORT_SYMBOL(qman_schedule_fq);
2017
2018 int qman_retire_fq(struct qman_fq *fq, u32 *flags)
2019 {
2020         union qm_mc_command *mcc;
2021         union qm_mc_result *mcr;
2022         struct qman_portal *p;
2023         int ret;
2024         u8 res;
2025
2026         if (fq->state != qman_fq_state_parked &&
2027             fq->state != qman_fq_state_sched)
2028                 return -EINVAL;
2029 #ifdef CONFIG_FSL_DPAA_CHECKING
2030         if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
2031                 return -EINVAL;
2032 #endif
2033         p = get_affine_portal();
2034         if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
2035             fq->state == qman_fq_state_retired ||
2036             fq->state == qman_fq_state_oos) {
2037                 ret = -EBUSY;
2038                 goto out;
2039         }
2040         mcc = qm_mc_start(&p->p);
2041         qm_fqid_set(&mcc->fq, fq->fqid);
2042         qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_RETIRE);
2043         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2044                 dev_crit(p->config->dev, "ALTER_RETIRE timeout\n");
2045                 ret = -ETIMEDOUT;
2046                 goto out;
2047         }
2048
2049         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_RETIRE);
2050         res = mcr->result;
2051         /*
2052          * "Elegant" would be to treat OK/PENDING the same way; set CHANGING,
2053          * and defer the flags until FQRNI or FQRN (respectively) show up. But
2054          * "Friendly" is to process OK immediately, and not set CHANGING. We do
2055          * friendly, otherwise the caller doesn't necessarily have a fully
2056          * "retired" FQ on return even if the retirement was immediate. However
2057          * this does mean some code duplication between here and
2058          * fq_state_change().
2059          */
2060         if (res == QM_MCR_RESULT_OK) {
2061                 ret = 0;
2062                 /* Process 'fq' right away, we'll ignore FQRNI */
2063                 if (mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY)
2064                         fq_set(fq, QMAN_FQ_STATE_NE);
2065                 if (mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)
2066                         fq_set(fq, QMAN_FQ_STATE_ORL);
2067                 if (flags)
2068                         *flags = fq->flags;
2069                 fq->state = qman_fq_state_retired;
2070                 if (fq->cb.fqs) {
2071                         /*
2072                          * Another issue with supporting "immediate" retirement
2073                          * is that we're forced to drop FQRNIs, because by the
2074                          * time they're seen it may already be "too late" (the
2075                          * fq may have been OOS'd and free()'d already). But if
2076                          * the upper layer wants a callback whether it's
2077                          * immediate or not, we have to fake a "MR" entry to
2078                          * look like an FQRNI...
2079                          */
2080                         union qm_mr_entry msg;
2081
2082                         msg.verb = QM_MR_VERB_FQRNI;
2083                         msg.fq.fqs = mcr->alterfq.fqs;
2084                         qm_fqid_set(&msg.fq, fq->fqid);
2085                         msg.fq.context_b = cpu_to_be32(fq_to_tag(fq));
2086                         fq->cb.fqs(p, fq, &msg);
2087                 }
2088         } else if (res == QM_MCR_RESULT_PENDING) {
2089                 ret = 1;
2090                 fq_set(fq, QMAN_FQ_STATE_CHANGING);
2091         } else {
2092                 ret = -EIO;
2093         }
2094 out:
2095         put_affine_portal();
2096         return ret;
2097 }
2098 EXPORT_SYMBOL(qman_retire_fq);
2099
2100 int qman_oos_fq(struct qman_fq *fq)
2101 {
2102         union qm_mc_command *mcc;
2103         union qm_mc_result *mcr;
2104         struct qman_portal *p;
2105         int ret = 0;
2106
2107         if (fq->state != qman_fq_state_retired)
2108                 return -EINVAL;
2109 #ifdef CONFIG_FSL_DPAA_CHECKING
2110         if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
2111                 return -EINVAL;
2112 #endif
2113         p = get_affine_portal();
2114         if (fq_isset(fq, QMAN_FQ_STATE_BLOCKOOS) ||
2115             fq->state != qman_fq_state_retired) {
2116                 ret = -EBUSY;
2117                 goto out;
2118         }
2119         mcc = qm_mc_start(&p->p);
2120         qm_fqid_set(&mcc->fq, fq->fqid);
2121         qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2122         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2123                 ret = -ETIMEDOUT;
2124                 goto out;
2125         }
2126         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_OOS);
2127         if (mcr->result != QM_MCR_RESULT_OK) {
2128                 ret = -EIO;
2129                 goto out;
2130         }
2131         fq->state = qman_fq_state_oos;
2132 out:
2133         put_affine_portal();
2134         return ret;
2135 }
2136 EXPORT_SYMBOL(qman_oos_fq);
2137
2138 int qman_query_fq(struct qman_fq *fq, struct qm_fqd *fqd)
2139 {
2140         union qm_mc_command *mcc;
2141         union qm_mc_result *mcr;
2142         struct qman_portal *p = get_affine_portal();
2143         int ret = 0;
2144
2145         mcc = qm_mc_start(&p->p);
2146         qm_fqid_set(&mcc->fq, fq->fqid);
2147         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
2148         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2149                 ret = -ETIMEDOUT;
2150                 goto out;
2151         }
2152
2153         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
2154         if (mcr->result == QM_MCR_RESULT_OK)
2155                 *fqd = mcr->queryfq.fqd;
2156         else
2157                 ret = -EIO;
2158 out:
2159         put_affine_portal();
2160         return ret;
2161 }
2162
2163 int qman_query_fq_np(struct qman_fq *fq, struct qm_mcr_queryfq_np *np)
2164 {
2165         union qm_mc_command *mcc;
2166         union qm_mc_result *mcr;
2167         struct qman_portal *p = get_affine_portal();
2168         int ret = 0;
2169
2170         mcc = qm_mc_start(&p->p);
2171         qm_fqid_set(&mcc->fq, fq->fqid);
2172         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
2173         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2174                 ret = -ETIMEDOUT;
2175                 goto out;
2176         }
2177
2178         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
2179         if (mcr->result == QM_MCR_RESULT_OK)
2180                 *np = mcr->queryfq_np;
2181         else if (mcr->result == QM_MCR_RESULT_ERR_FQID)
2182                 ret = -ERANGE;
2183         else
2184                 ret = -EIO;
2185 out:
2186         put_affine_portal();
2187         return ret;
2188 }
2189 EXPORT_SYMBOL(qman_query_fq_np);
2190
2191 static int qman_query_cgr(struct qman_cgr *cgr,
2192                           struct qm_mcr_querycgr *cgrd)
2193 {
2194         union qm_mc_command *mcc;
2195         union qm_mc_result *mcr;
2196         struct qman_portal *p = get_affine_portal();
2197         int ret = 0;
2198
2199         mcc = qm_mc_start(&p->p);
2200         mcc->cgr.cgid = cgr->cgrid;
2201         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCGR);
2202         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2203                 ret = -ETIMEDOUT;
2204                 goto out;
2205         }
2206         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYCGR);
2207         if (mcr->result == QM_MCR_RESULT_OK)
2208                 *cgrd = mcr->querycgr;
2209         else {
2210                 dev_err(p->config->dev, "QUERY_CGR failed: %s\n",
2211                         mcr_result_str(mcr->result));
2212                 ret = -EIO;
2213         }
2214 out:
2215         put_affine_portal();
2216         return ret;
2217 }
2218
2219 int qman_query_cgr_congested(struct qman_cgr *cgr, bool *result)
2220 {
2221         struct qm_mcr_querycgr query_cgr;
2222         int err;
2223
2224         err = qman_query_cgr(cgr, &query_cgr);
2225         if (err)
2226                 return err;
2227
2228         *result = !!query_cgr.cgr.cs;
2229         return 0;
2230 }
2231 EXPORT_SYMBOL(qman_query_cgr_congested);
2232
2233 /* internal function used as a wait_event() expression */
2234 static int set_p_vdqcr(struct qman_portal *p, struct qman_fq *fq, u32 vdqcr)
2235 {
2236         unsigned long irqflags;
2237         int ret = -EBUSY;
2238
2239         local_irq_save(irqflags);
2240         if (p->vdqcr_owned)
2241                 goto out;
2242         if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
2243                 goto out;
2244
2245         fq_set(fq, QMAN_FQ_STATE_VDQCR);
2246         p->vdqcr_owned = fq;
2247         qm_dqrr_vdqcr_set(&p->p, vdqcr);
2248         ret = 0;
2249 out:
2250         local_irq_restore(irqflags);
2251         return ret;
2252 }
2253
2254 static int set_vdqcr(struct qman_portal **p, struct qman_fq *fq, u32 vdqcr)
2255 {
2256         int ret;
2257
2258         *p = get_affine_portal();
2259         ret = set_p_vdqcr(*p, fq, vdqcr);
2260         put_affine_portal();
2261         return ret;
2262 }
2263
2264 static int wait_vdqcr_start(struct qman_portal **p, struct qman_fq *fq,
2265                                 u32 vdqcr, u32 flags)
2266 {
2267         int ret = 0;
2268
2269         if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
2270                 ret = wait_event_interruptible(affine_queue,
2271                                 !set_vdqcr(p, fq, vdqcr));
2272         else
2273                 wait_event(affine_queue, !set_vdqcr(p, fq, vdqcr));
2274         return ret;
2275 }
2276
2277 int qman_volatile_dequeue(struct qman_fq *fq, u32 flags, u32 vdqcr)
2278 {
2279         struct qman_portal *p;
2280         int ret;
2281
2282         if (fq->state != qman_fq_state_parked &&
2283             fq->state != qman_fq_state_retired)
2284                 return -EINVAL;
2285         if (vdqcr & QM_VDQCR_FQID_MASK)
2286                 return -EINVAL;
2287         if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
2288                 return -EBUSY;
2289         vdqcr = (vdqcr & ~QM_VDQCR_FQID_MASK) | fq->fqid;
2290         if (flags & QMAN_VOLATILE_FLAG_WAIT)
2291                 ret = wait_vdqcr_start(&p, fq, vdqcr, flags);
2292         else
2293                 ret = set_vdqcr(&p, fq, vdqcr);
2294         if (ret)
2295                 return ret;
2296         /* VDQCR is set */
2297         if (flags & QMAN_VOLATILE_FLAG_FINISH) {
2298                 if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
2299                         /*
2300                          * NB: don't propagate any error - the caller wouldn't
2301                          * know whether the VDQCR was issued or not. A signal
2302                          * could arrive after returning anyway, so the caller
2303                          * can check signal_pending() if that's an issue.
2304                          */
2305                         wait_event_interruptible(affine_queue,
2306                                 !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
2307                 else
2308                         wait_event(affine_queue,
2309                                 !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
2310         }
2311         return 0;
2312 }
2313 EXPORT_SYMBOL(qman_volatile_dequeue);
2314
2315 static void update_eqcr_ci(struct qman_portal *p, u8 avail)
2316 {
2317         if (avail)
2318                 qm_eqcr_cce_prefetch(&p->p);
2319         else
2320                 qm_eqcr_cce_update(&p->p);
2321 }
2322
2323 int qman_enqueue(struct qman_fq *fq, const struct qm_fd *fd)
2324 {
2325         struct qman_portal *p;
2326         struct qm_eqcr_entry *eq;
2327         unsigned long irqflags;
2328         u8 avail;
2329
2330         p = get_affine_portal();
2331         local_irq_save(irqflags);
2332
2333         if (p->use_eqcr_ci_stashing) {
2334                 /*
2335                  * The stashing case is easy, only update if we need to in
2336                  * order to try and liberate ring entries.
2337                  */
2338                 eq = qm_eqcr_start_stash(&p->p);
2339         } else {
2340                 /*
2341                  * The non-stashing case is harder, need to prefetch ahead of
2342                  * time.
2343                  */
2344                 avail = qm_eqcr_get_avail(&p->p);
2345                 if (avail < 2)
2346                         update_eqcr_ci(p, avail);
2347                 eq = qm_eqcr_start_no_stash(&p->p);
2348         }
2349
2350         if (unlikely(!eq))
2351                 goto out;
2352
2353         qm_fqid_set(eq, fq->fqid);
2354         eq->tag = cpu_to_be32(fq_to_tag(fq));
2355         eq->fd = *fd;
2356
2357         qm_eqcr_pvb_commit(&p->p, QM_EQCR_VERB_CMD_ENQUEUE);
2358 out:
2359         local_irq_restore(irqflags);
2360         put_affine_portal();
2361         return 0;
2362 }
2363 EXPORT_SYMBOL(qman_enqueue);
2364
2365 static int qm_modify_cgr(struct qman_cgr *cgr, u32 flags,
2366                          struct qm_mcc_initcgr *opts)
2367 {
2368         union qm_mc_command *mcc;
2369         union qm_mc_result *mcr;
2370         struct qman_portal *p = get_affine_portal();
2371         u8 verb = QM_MCC_VERB_MODIFYCGR;
2372         int ret = 0;
2373
2374         mcc = qm_mc_start(&p->p);
2375         if (opts)
2376                 mcc->initcgr = *opts;
2377         mcc->initcgr.cgid = cgr->cgrid;
2378         if (flags & QMAN_CGR_FLAG_USE_INIT)
2379                 verb = QM_MCC_VERB_INITCGR;
2380         qm_mc_commit(&p->p, verb);
2381         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2382                 ret = -ETIMEDOUT;
2383                 goto out;
2384         }
2385
2386         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == verb);
2387         if (mcr->result != QM_MCR_RESULT_OK)
2388                 ret = -EIO;
2389
2390 out:
2391         put_affine_portal();
2392         return ret;
2393 }
2394
2395 #define PORTAL_IDX(n)   (n->config->channel - QM_CHANNEL_SWPORTAL0)
2396
2397 /* congestion state change notification target update control */
2398 static void qm_cgr_cscn_targ_set(struct __qm_mc_cgr *cgr, int pi, u32 val)
2399 {
2400         if (qman_ip_rev >= QMAN_REV30)
2401                 cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi |
2402                                         QM_CGR_TARG_UDP_CTRL_WRITE_BIT);
2403         else
2404                 cgr->cscn_targ = cpu_to_be32(val | QM_CGR_TARG_PORTAL(pi));
2405 }
2406
2407 static void qm_cgr_cscn_targ_clear(struct __qm_mc_cgr *cgr, int pi, u32 val)
2408 {
2409         if (qman_ip_rev >= QMAN_REV30)
2410                 cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi);
2411         else
2412                 cgr->cscn_targ = cpu_to_be32(val & ~QM_CGR_TARG_PORTAL(pi));
2413 }
2414
2415 static u8 qman_cgr_cpus[CGR_NUM];
2416
2417 void qman_init_cgr_all(void)
2418 {
2419         struct qman_cgr cgr;
2420         int err_cnt = 0;
2421
2422         for (cgr.cgrid = 0; cgr.cgrid < CGR_NUM; cgr.cgrid++) {
2423                 if (qm_modify_cgr(&cgr, QMAN_CGR_FLAG_USE_INIT, NULL))
2424                         err_cnt++;
2425         }
2426
2427         if (err_cnt)
2428                 pr_err("Warning: %d error%s while initialising CGR h/w\n",
2429                        err_cnt, (err_cnt > 1) ? "s" : "");
2430 }
2431
2432 int qman_create_cgr(struct qman_cgr *cgr, u32 flags,
2433                     struct qm_mcc_initcgr *opts)
2434 {
2435         struct qm_mcr_querycgr cgr_state;
2436         int ret;
2437         struct qman_portal *p;
2438
2439         /*
2440          * We have to check that the provided CGRID is within the limits of the
2441          * data-structures, for obvious reasons. However we'll let h/w take
2442          * care of determining whether it's within the limits of what exists on
2443          * the SoC.
2444          */
2445         if (cgr->cgrid >= CGR_NUM)
2446                 return -EINVAL;
2447
2448         preempt_disable();
2449         p = get_affine_portal();
2450         qman_cgr_cpus[cgr->cgrid] = smp_processor_id();
2451         preempt_enable();
2452
2453         cgr->chan = p->config->channel;
2454         spin_lock(&p->cgr_lock);
2455
2456         if (opts) {
2457                 struct qm_mcc_initcgr local_opts = *opts;
2458
2459                 ret = qman_query_cgr(cgr, &cgr_state);
2460                 if (ret)
2461                         goto out;
2462
2463                 qm_cgr_cscn_targ_set(&local_opts.cgr, PORTAL_IDX(p),
2464                                      be32_to_cpu(cgr_state.cgr.cscn_targ));
2465                 local_opts.we_mask |= cpu_to_be16(QM_CGR_WE_CSCN_TARG);
2466
2467                 /* send init if flags indicate so */
2468                 if (flags & QMAN_CGR_FLAG_USE_INIT)
2469                         ret = qm_modify_cgr(cgr, QMAN_CGR_FLAG_USE_INIT,
2470                                             &local_opts);
2471                 else
2472                         ret = qm_modify_cgr(cgr, 0, &local_opts);
2473                 if (ret)
2474                         goto out;
2475         }
2476
2477         list_add(&cgr->node, &p->cgr_cbs);
2478
2479         /* Determine if newly added object requires its callback to be called */
2480         ret = qman_query_cgr(cgr, &cgr_state);
2481         if (ret) {
2482                 /* we can't go back, so proceed and return success */
2483                 dev_err(p->config->dev, "CGR HW state partially modified\n");
2484                 ret = 0;
2485                 goto out;
2486         }
2487         if (cgr->cb && cgr_state.cgr.cscn_en &&
2488             qman_cgrs_get(&p->cgrs[1], cgr->cgrid))
2489                 cgr->cb(p, cgr, 1);
2490 out:
2491         spin_unlock(&p->cgr_lock);
2492         put_affine_portal();
2493         return ret;
2494 }
2495 EXPORT_SYMBOL(qman_create_cgr);
2496
2497 int qman_delete_cgr(struct qman_cgr *cgr)
2498 {
2499         unsigned long irqflags;
2500         struct qm_mcr_querycgr cgr_state;
2501         struct qm_mcc_initcgr local_opts;
2502         int ret = 0;
2503         struct qman_cgr *i;
2504         struct qman_portal *p = get_affine_portal();
2505
2506         if (cgr->chan != p->config->channel) {
2507                 /* attempt to delete from other portal than creator */
2508                 dev_err(p->config->dev, "CGR not owned by current portal");
2509                 dev_dbg(p->config->dev, " create 0x%x, delete 0x%x\n",
2510                         cgr->chan, p->config->channel);
2511
2512                 ret = -EINVAL;
2513                 goto put_portal;
2514         }
2515         memset(&local_opts, 0, sizeof(struct qm_mcc_initcgr));
2516         spin_lock_irqsave(&p->cgr_lock, irqflags);
2517         list_del(&cgr->node);
2518         /*
2519          * If there are no other CGR objects for this CGRID in the list,
2520          * update CSCN_TARG accordingly
2521          */
2522         list_for_each_entry(i, &p->cgr_cbs, node)
2523                 if (i->cgrid == cgr->cgrid && i->cb)
2524                         goto release_lock;
2525         ret = qman_query_cgr(cgr, &cgr_state);
2526         if (ret)  {
2527                 /* add back to the list */
2528                 list_add(&cgr->node, &p->cgr_cbs);
2529                 goto release_lock;
2530         }
2531
2532         local_opts.we_mask = cpu_to_be16(QM_CGR_WE_CSCN_TARG);
2533         qm_cgr_cscn_targ_clear(&local_opts.cgr, PORTAL_IDX(p),
2534                                be32_to_cpu(cgr_state.cgr.cscn_targ));
2535
2536         ret = qm_modify_cgr(cgr, 0, &local_opts);
2537         if (ret)
2538                 /* add back to the list */
2539                 list_add(&cgr->node, &p->cgr_cbs);
2540 release_lock:
2541         spin_unlock_irqrestore(&p->cgr_lock, irqflags);
2542 put_portal:
2543         put_affine_portal();
2544         return ret;
2545 }
2546 EXPORT_SYMBOL(qman_delete_cgr);
2547
2548 struct cgr_comp {
2549         struct qman_cgr *cgr;
2550         struct completion completion;
2551 };
2552
2553 static void qman_delete_cgr_smp_call(void *p)
2554 {
2555         qman_delete_cgr((struct qman_cgr *)p);
2556 }
2557
2558 void qman_delete_cgr_safe(struct qman_cgr *cgr)
2559 {
2560         preempt_disable();
2561         if (qman_cgr_cpus[cgr->cgrid] != smp_processor_id()) {
2562                 smp_call_function_single(qman_cgr_cpus[cgr->cgrid],
2563                                          qman_delete_cgr_smp_call, cgr, true);
2564                 preempt_enable();
2565                 return;
2566         }
2567
2568         qman_delete_cgr(cgr);
2569         preempt_enable();
2570 }
2571 EXPORT_SYMBOL(qman_delete_cgr_safe);
2572
2573 /* Cleanup FQs */
2574
2575 static int _qm_mr_consume_and_match_verb(struct qm_portal *p, int v)
2576 {
2577         const union qm_mr_entry *msg;
2578         int found = 0;
2579
2580         qm_mr_pvb_update(p);
2581         msg = qm_mr_current(p);
2582         while (msg) {
2583                 if ((msg->verb & QM_MR_VERB_TYPE_MASK) == v)
2584                         found = 1;
2585                 qm_mr_next(p);
2586                 qm_mr_cci_consume_to_current(p);
2587                 qm_mr_pvb_update(p);
2588                 msg = qm_mr_current(p);
2589         }
2590         return found;
2591 }
2592
2593 static int _qm_dqrr_consume_and_match(struct qm_portal *p, u32 fqid, int s,
2594                                       bool wait)
2595 {
2596         const struct qm_dqrr_entry *dqrr;
2597         int found = 0;
2598
2599         do {
2600                 qm_dqrr_pvb_update(p);
2601                 dqrr = qm_dqrr_current(p);
2602                 if (!dqrr)
2603                         cpu_relax();
2604         } while (wait && !dqrr);
2605
2606         while (dqrr) {
2607                 if (qm_fqid_get(dqrr) == fqid && (dqrr->stat & s))
2608                         found = 1;
2609                 qm_dqrr_cdc_consume_1ptr(p, dqrr, 0);
2610                 qm_dqrr_pvb_update(p);
2611                 qm_dqrr_next(p);
2612                 dqrr = qm_dqrr_current(p);
2613         }
2614         return found;
2615 }
2616
2617 #define qm_mr_drain(p, V) \
2618         _qm_mr_consume_and_match_verb(p, QM_MR_VERB_##V)
2619
2620 #define qm_dqrr_drain(p, f, S) \
2621         _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, false)
2622
2623 #define qm_dqrr_drain_wait(p, f, S) \
2624         _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, true)
2625
2626 #define qm_dqrr_drain_nomatch(p) \
2627         _qm_dqrr_consume_and_match(p, 0, 0, false)
2628
2629 int qman_shutdown_fq(u32 fqid)
2630 {
2631         struct qman_portal *p, *channel_portal;
2632         struct device *dev;
2633         union qm_mc_command *mcc;
2634         union qm_mc_result *mcr;
2635         int orl_empty, drain = 0, ret = 0;
2636         u32 channel, wq, res;
2637         u8 state;
2638
2639         p = get_affine_portal();
2640         dev = p->config->dev;
2641         /* Determine the state of the FQID */
2642         mcc = qm_mc_start(&p->p);
2643         qm_fqid_set(&mcc->fq, fqid);
2644         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
2645         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2646                 dev_err(dev, "QUERYFQ_NP timeout\n");
2647                 ret = -ETIMEDOUT;
2648                 goto out;
2649         }
2650
2651         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
2652         state = mcr->queryfq_np.state & QM_MCR_NP_STATE_MASK;
2653         if (state == QM_MCR_NP_STATE_OOS)
2654                 goto out; /* Already OOS, no need to do anymore checks */
2655
2656         /* Query which channel the FQ is using */
2657         mcc = qm_mc_start(&p->p);
2658         qm_fqid_set(&mcc->fq, fqid);
2659         qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
2660         if (!qm_mc_result_timeout(&p->p, &mcr)) {
2661                 dev_err(dev, "QUERYFQ timeout\n");
2662                 ret = -ETIMEDOUT;
2663                 goto out;
2664         }
2665
2666         DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
2667         /* Need to store these since the MCR gets reused */
2668         channel = qm_fqd_get_chan(&mcr->queryfq.fqd);
2669         wq = qm_fqd_get_wq(&mcr->queryfq.fqd);
2670
2671         if (channel < qm_channel_pool1) {
2672                 channel_portal = get_portal_for_channel(channel);
2673                 if (channel_portal == NULL) {
2674                         dev_err(dev, "Can't find portal for dedicated channel 0x%x\n",
2675                                 channel);
2676                         ret = -EIO;
2677                         goto out;
2678                 }
2679         } else
2680                 channel_portal = p;
2681
2682         switch (state) {
2683         case QM_MCR_NP_STATE_TEN_SCHED:
2684         case QM_MCR_NP_STATE_TRU_SCHED:
2685         case QM_MCR_NP_STATE_ACTIVE:
2686         case QM_MCR_NP_STATE_PARKED:
2687                 orl_empty = 0;
2688                 mcc = qm_mc_start(&channel_portal->p);
2689                 qm_fqid_set(&mcc->fq, fqid);
2690                 qm_mc_commit(&channel_portal->p, QM_MCC_VERB_ALTER_RETIRE);
2691                 if (!qm_mc_result_timeout(&channel_portal->p, &mcr)) {
2692                         dev_err(dev, "ALTER_RETIRE timeout\n");
2693                         ret = -ETIMEDOUT;
2694                         goto out;
2695                 }
2696                 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2697                             QM_MCR_VERB_ALTER_RETIRE);
2698                 res = mcr->result; /* Make a copy as we reuse MCR below */
2699
2700                 if (res == QM_MCR_RESULT_OK)
2701                         drain_mr_fqrni(&channel_portal->p);
2702
2703                 if (res == QM_MCR_RESULT_PENDING) {
2704                         /*
2705                          * Need to wait for the FQRN in the message ring, which
2706                          * will only occur once the FQ has been drained.  In
2707                          * order for the FQ to drain the portal needs to be set
2708                          * to dequeue from the channel the FQ is scheduled on
2709                          */
2710                         int found_fqrn = 0;
2711                         u16 dequeue_wq = 0;
2712
2713                         /* Flag that we need to drain FQ */
2714                         drain = 1;
2715
2716                         if (channel >= qm_channel_pool1 &&
2717                             channel < qm_channel_pool1 + 15) {
2718                                 /* Pool channel, enable the bit in the portal */
2719                                 dequeue_wq = (channel -
2720                                               qm_channel_pool1 + 1)<<4 | wq;
2721                         } else if (channel < qm_channel_pool1) {
2722                                 /* Dedicated channel */
2723                                 dequeue_wq = wq;
2724                         } else {
2725                                 dev_err(dev, "Can't recover FQ 0x%x, ch: 0x%x",
2726                                         fqid, channel);
2727                                 ret = -EBUSY;
2728                                 goto out;
2729                         }
2730                         /* Set the sdqcr to drain this channel */
2731                         if (channel < qm_channel_pool1)
2732                                 qm_dqrr_sdqcr_set(&channel_portal->p,
2733                                                   QM_SDQCR_TYPE_ACTIVE |
2734                                                   QM_SDQCR_CHANNELS_DEDICATED);
2735                         else
2736                                 qm_dqrr_sdqcr_set(&channel_portal->p,
2737                                                   QM_SDQCR_TYPE_ACTIVE |
2738                                                   QM_SDQCR_CHANNELS_POOL_CONV
2739                                                   (channel));
2740                         do {
2741                                 /* Keep draining DQRR while checking the MR*/
2742                                 qm_dqrr_drain_nomatch(&channel_portal->p);
2743                                 /* Process message ring too */
2744                                 found_fqrn = qm_mr_drain(&channel_portal->p,
2745                                                          FQRN);
2746                                 cpu_relax();
2747                         } while (!found_fqrn);
2748                         /* Restore SDQCR */
2749                         qm_dqrr_sdqcr_set(&channel_portal->p,
2750                                           channel_portal->sdqcr);
2751
2752                 }
2753                 if (res != QM_MCR_RESULT_OK &&
2754                     res != QM_MCR_RESULT_PENDING) {
2755                         dev_err(dev, "retire_fq failed: FQ 0x%x, res=0x%x\n",
2756                                 fqid, res);
2757                         ret = -EIO;
2758                         goto out;
2759                 }
2760                 if (!(mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)) {
2761                         /*
2762                          * ORL had no entries, no need to wait until the
2763                          * ERNs come in
2764                          */
2765                         orl_empty = 1;
2766                 }
2767                 /*
2768                  * Retirement succeeded, check to see if FQ needs
2769                  * to be drained
2770                  */
2771                 if (drain || mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY) {
2772                         /* FQ is Not Empty, drain using volatile DQ commands */
2773                         do {
2774                                 u32 vdqcr = fqid | QM_VDQCR_NUMFRAMES_SET(3);
2775
2776                                 qm_dqrr_vdqcr_set(&p->p, vdqcr);
2777                                 /*
2778                                  * Wait for a dequeue and process the dequeues,
2779                                  * making sure to empty the ring completely
2780                                  */
2781                         } while (!qm_dqrr_drain_wait(&p->p, fqid, FQ_EMPTY));
2782                 }
2783
2784                 while (!orl_empty) {
2785                         /* Wait for the ORL to have been completely drained */
2786                         orl_empty = qm_mr_drain(&p->p, FQRL);
2787                         cpu_relax();
2788                 }
2789                 mcc = qm_mc_start(&p->p);
2790                 qm_fqid_set(&mcc->fq, fqid);
2791                 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2792                 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2793                         ret = -ETIMEDOUT;
2794                         goto out;
2795                 }
2796
2797                 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2798                             QM_MCR_VERB_ALTER_OOS);
2799                 if (mcr->result != QM_MCR_RESULT_OK) {
2800                         dev_err(dev, "OOS after drain fail: FQ 0x%x (0x%x)\n",
2801                                 fqid, mcr->result);
2802                         ret = -EIO;
2803                         goto out;
2804                 }
2805                 break;
2806
2807         case QM_MCR_NP_STATE_RETIRED:
2808                 /* Send OOS Command */
2809                 mcc = qm_mc_start(&p->p);
2810                 qm_fqid_set(&mcc->fq, fqid);
2811                 qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
2812                 if (!qm_mc_result_timeout(&p->p, &mcr)) {
2813                         ret = -ETIMEDOUT;
2814                         goto out;
2815                 }
2816
2817                 DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
2818                             QM_MCR_VERB_ALTER_OOS);
2819                 if (mcr->result != QM_MCR_RESULT_OK) {
2820                         dev_err(dev, "OOS fail: FQ 0x%x (0x%x)\n",
2821                                 fqid, mcr->result);
2822                         ret = -EIO;
2823                         goto out;
2824                 }
2825                 break;
2826
2827         case QM_MCR_NP_STATE_OOS:
2828                 /*  Done */
2829                 break;
2830
2831         default:
2832                 ret = -EIO;
2833         }
2834
2835 out:
2836         put_affine_portal();
2837         return ret;
2838 }
2839
2840 const struct qm_portal_config *qman_get_qm_portal_config(
2841                                                 struct qman_portal *portal)
2842 {
2843         return portal->config;
2844 }
2845 EXPORT_SYMBOL(qman_get_qm_portal_config);
2846
2847 struct gen_pool *qm_fqalloc; /* FQID allocator */
2848 struct gen_pool *qm_qpalloc; /* pool-channel allocator */
2849 struct gen_pool *qm_cgralloc; /* CGR ID allocator */
2850
2851 static int qman_alloc_range(struct gen_pool *p, u32 *result, u32 cnt)
2852 {
2853         unsigned long addr;
2854
2855         if (!p)
2856                 return -ENODEV;
2857
2858         addr = gen_pool_alloc(p, cnt);
2859         if (!addr)
2860                 return -ENOMEM;
2861
2862         *result = addr & ~DPAA_GENALLOC_OFF;
2863
2864         return 0;
2865 }
2866
2867 int qman_alloc_fqid_range(u32 *result, u32 count)
2868 {
2869         return qman_alloc_range(qm_fqalloc, result, count);
2870 }
2871 EXPORT_SYMBOL(qman_alloc_fqid_range);
2872
2873 int qman_alloc_pool_range(u32 *result, u32 count)
2874 {
2875         return qman_alloc_range(qm_qpalloc, result, count);
2876 }
2877 EXPORT_SYMBOL(qman_alloc_pool_range);
2878
2879 int qman_alloc_cgrid_range(u32 *result, u32 count)
2880 {
2881         return qman_alloc_range(qm_cgralloc, result, count);
2882 }
2883 EXPORT_SYMBOL(qman_alloc_cgrid_range);
2884
2885 int qman_release_fqid(u32 fqid)
2886 {
2887         int ret = qman_shutdown_fq(fqid);
2888
2889         if (ret) {
2890                 pr_debug("FQID %d leaked\n", fqid);
2891                 return ret;
2892         }
2893
2894         gen_pool_free(qm_fqalloc, fqid | DPAA_GENALLOC_OFF, 1);
2895         return 0;
2896 }
2897 EXPORT_SYMBOL(qman_release_fqid);
2898
2899 static int qpool_cleanup(u32 qp)
2900 {
2901         /*
2902          * We query all FQDs starting from
2903          * FQID 1 until we get an "invalid FQID" error, looking for non-OOS FQDs
2904          * whose destination channel is the pool-channel being released.
2905          * When a non-OOS FQD is found we attempt to clean it up
2906          */
2907         struct qman_fq fq = {
2908                 .fqid = QM_FQID_RANGE_START
2909         };
2910         int err;
2911
2912         do {
2913                 struct qm_mcr_queryfq_np np;
2914
2915                 err = qman_query_fq_np(&fq, &np);
2916                 if (err == -ERANGE)
2917                         /* FQID range exceeded, found no problems */
2918                         return 0;
2919                 else if (WARN_ON(err))
2920                         return err;
2921
2922                 if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
2923                         struct qm_fqd fqd;
2924
2925                         err = qman_query_fq(&fq, &fqd);
2926                         if (WARN_ON(err))
2927                                 return err;
2928                         if (qm_fqd_get_chan(&fqd) == qp) {
2929                                 /* The channel is the FQ's target, clean it */
2930                                 err = qman_shutdown_fq(fq.fqid);
2931                                 if (err)
2932                                         /*
2933                                          * Couldn't shut down the FQ
2934                                          * so the pool must be leaked
2935                                          */
2936                                         return err;
2937                         }
2938                 }
2939                 /* Move to the next FQID */
2940                 fq.fqid++;
2941         } while (1);
2942 }
2943
2944 int qman_release_pool(u32 qp)
2945 {
2946         int ret;
2947
2948         ret = qpool_cleanup(qp);
2949         if (ret) {
2950                 pr_debug("CHID %d leaked\n", qp);
2951                 return ret;
2952         }
2953
2954         gen_pool_free(qm_qpalloc, qp | DPAA_GENALLOC_OFF, 1);
2955         return 0;
2956 }
2957 EXPORT_SYMBOL(qman_release_pool);
2958
2959 static int cgr_cleanup(u32 cgrid)
2960 {
2961         /*
2962          * query all FQDs starting from FQID 1 until we get an "invalid FQID"
2963          * error, looking for non-OOS FQDs whose CGR is the CGR being released
2964          */
2965         struct qman_fq fq = {
2966                 .fqid = QM_FQID_RANGE_START
2967         };
2968         int err;
2969
2970         do {
2971                 struct qm_mcr_queryfq_np np;
2972
2973                 err = qman_query_fq_np(&fq, &np);
2974                 if (err == -ERANGE)
2975                         /* FQID range exceeded, found no problems */
2976                         return 0;
2977                 else if (WARN_ON(err))
2978                         return err;
2979
2980                 if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
2981                         struct qm_fqd fqd;
2982
2983                         err = qman_query_fq(&fq, &fqd);
2984                         if (WARN_ON(err))
2985                                 return err;
2986                         if (be16_to_cpu(fqd.fq_ctrl) & QM_FQCTRL_CGE &&
2987                             fqd.cgid == cgrid) {
2988                                 pr_err("CRGID 0x%x is being used by FQID 0x%x, CGR will be leaked\n",
2989                                        cgrid, fq.fqid);
2990                                 return -EIO;
2991                         }
2992                 }
2993                 /* Move to the next FQID */
2994                 fq.fqid++;
2995         } while (1);
2996 }
2997
2998 int qman_release_cgrid(u32 cgrid)
2999 {
3000         int ret;
3001
3002         ret = cgr_cleanup(cgrid);
3003         if (ret) {
3004                 pr_debug("CGRID %d leaked\n", cgrid);
3005                 return ret;
3006         }
3007
3008         gen_pool_free(qm_cgralloc, cgrid | DPAA_GENALLOC_OFF, 1);
3009         return 0;
3010 }
3011 EXPORT_SYMBOL(qman_release_cgrid);