xtensa: support DMA buffers in high memory

[cris-mirror.git] / drivers / soc / fsl / qbman / qman.c

/* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "qman_priv.h"

#define DQRR_MAXFILL    15
#define EQCR_ITHRESH    4       /* if EQCR congests, interrupt threshold */
#define IRQNAME         "QMan portal %d"
#define MAX_IRQNAME     16      /* big enough for "QMan portal %d" */
#define QMAN_POLL_LIMIT 32
#define QMAN_PIRQ_DQRR_ITHRESH 12
#define QMAN_PIRQ_MR_ITHRESH 4
#define QMAN_PIRQ_IPERIOD 100

/* Portal register assists */

#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
/* Cache-inhibited register offsets */
#define QM_REG_EQCR_PI_CINH     0x3000
#define QM_REG_EQCR_CI_CINH     0x3040
#define QM_REG_EQCR_ITR         0x3080
#define QM_REG_DQRR_PI_CINH     0x3100
#define QM_REG_DQRR_CI_CINH     0x3140
#define QM_REG_DQRR_ITR         0x3180
#define QM_REG_DQRR_DCAP        0x31C0
#define QM_REG_DQRR_SDQCR       0x3200
#define QM_REG_DQRR_VDQCR       0x3240
#define QM_REG_DQRR_PDQCR       0x3280
#define QM_REG_MR_PI_CINH       0x3300
#define QM_REG_MR_CI_CINH       0x3340
#define QM_REG_MR_ITR           0x3380
#define QM_REG_CFG              0x3500
#define QM_REG_ISR              0x3600
#define QM_REG_IER              0x3640
#define QM_REG_ISDR             0x3680
#define QM_REG_IIR              0x36C0
#define QM_REG_ITPR             0x3740

/* Cache-enabled register offsets */
#define QM_CL_EQCR              0x0000
#define QM_CL_DQRR              0x1000
#define QM_CL_MR                0x2000
#define QM_CL_EQCR_PI_CENA      0x3000
#define QM_CL_EQCR_CI_CENA      0x3040
#define QM_CL_DQRR_PI_CENA      0x3100
#define QM_CL_DQRR_CI_CENA      0x3140
#define QM_CL_MR_PI_CENA        0x3300
#define QM_CL_MR_CI_CENA        0x3340
#define QM_CL_CR                0x3800
#define QM_CL_RR0               0x3900
#define QM_CL_RR1               0x3940

#else
/* Cache-inhibited register offsets */
#define QM_REG_EQCR_PI_CINH     0x0000
#define QM_REG_EQCR_CI_CINH     0x0004
#define QM_REG_EQCR_ITR         0x0008
#define QM_REG_DQRR_PI_CINH     0x0040
#define QM_REG_DQRR_CI_CINH     0x0044
#define QM_REG_DQRR_ITR         0x0048
#define QM_REG_DQRR_DCAP        0x0050
#define QM_REG_DQRR_SDQCR       0x0054
#define QM_REG_DQRR_VDQCR       0x0058
#define QM_REG_DQRR_PDQCR       0x005c
#define QM_REG_MR_PI_CINH       0x0080
#define QM_REG_MR_CI_CINH       0x0084
#define QM_REG_MR_ITR           0x0088
#define QM_REG_CFG              0x0100
#define QM_REG_ISR              0x0e00
#define QM_REG_IER              0x0e04
#define QM_REG_ISDR             0x0e08
#define QM_REG_IIR              0x0e0c
#define QM_REG_ITPR             0x0e14

/* Cache-enabled register offsets */
#define QM_CL_EQCR              0x0000
#define QM_CL_DQRR              0x1000
#define QM_CL_MR                0x2000
#define QM_CL_EQCR_PI_CENA      0x3000
#define QM_CL_EQCR_CI_CENA      0x3100
#define QM_CL_DQRR_PI_CENA      0x3200
#define QM_CL_DQRR_CI_CENA      0x3300
#define QM_CL_MR_PI_CENA        0x3400
#define QM_CL_MR_CI_CENA        0x3500
#define QM_CL_CR                0x3800
#define QM_CL_RR0               0x3900
#define QM_CL_RR1               0x3940
#endif

/*
 * BTW, the drivers (and h/w programming model) already obtain the required
 * synchronisation for portal accesses and data-dependencies. Use of barrier()s
 * or other order-preserving primitives simply degrade performance. Hence the
 * use of the __raw_*() interfaces, which simply ensure that the compiler treats
 * the portal registers as volatile
 */

/* Cache-enabled ring access */
#define qm_cl(base, idx)        ((void *)base + ((idx) << 6))

/*
 * Portal modes.
 *   Enum types;
 *     pmode == production mode
 *     cmode == consumption mode,
 *     dmode == h/w dequeue mode.
 *   Enum values use 3 letter codes. First letter matches the portal mode,
 *   remaining two letters indicate;
 *     ci == cache-inhibited portal register
 *     ce == cache-enabled portal register
 *     vb == in-band valid-bit (cache-enabled)
 *     dc == DCA (Discrete Consumption Acknowledgment), DQRR-only
 *   As for "enum qm_dqrr_dmode", it should be self-explanatory.
 */
enum qm_eqcr_pmode {            /* matches QCSP_CFG::EPM */
        qm_eqcr_pci = 0,        /* PI index, cache-inhibited */
        qm_eqcr_pce = 1,        /* PI index, cache-enabled */
        qm_eqcr_pvb = 2         /* valid-bit */
};
enum qm_dqrr_dmode {            /* matches QCSP_CFG::DP */
        qm_dqrr_dpush = 0,      /* SDQCR  + VDQCR */
        qm_dqrr_dpull = 1       /* PDQCR */
};
enum qm_dqrr_pmode {            /* s/w-only */
        qm_dqrr_pci,            /* reads DQRR_PI_CINH */
        qm_dqrr_pce,            /* reads DQRR_PI_CENA */
        qm_dqrr_pvb             /* reads valid-bit */
};
enum qm_dqrr_cmode {            /* matches QCSP_CFG::DCM */
        qm_dqrr_cci = 0,        /* CI index, cache-inhibited */
        qm_dqrr_cce = 1,        /* CI index, cache-enabled */
        qm_dqrr_cdc = 2         /* Discrete Consumption Acknowledgment */
};
enum qm_mr_pmode {              /* s/w-only */
        qm_mr_pci,              /* reads MR_PI_CINH */
        qm_mr_pce,              /* reads MR_PI_CENA */
        qm_mr_pvb               /* reads valid-bit */
};
enum qm_mr_cmode {              /* matches QCSP_CFG::MM */
        qm_mr_cci = 0,          /* CI index, cache-inhibited */
        qm_mr_cce = 1           /* CI index, cache-enabled */
};

/* --- Portal structures --- */

#define QM_EQCR_SIZE            8
#define QM_DQRR_SIZE            16
#define QM_MR_SIZE              8

/* "Enqueue Command" */
struct qm_eqcr_entry {
        u8 _ncw_verb; /* writes to this are non-coherent */
        u8 dca;
        __be16 seqnum;
        u8 __reserved[4];
        __be32 fqid;    /* 24-bit */
        __be32 tag;
        struct qm_fd fd;
        u8 __reserved3[32];
} __packed;
#define QM_EQCR_VERB_VBIT               0x80
#define QM_EQCR_VERB_CMD_MASK           0x61    /* but only one value; */
#define QM_EQCR_VERB_CMD_ENQUEUE        0x01
#define QM_EQCR_SEQNUM_NESN             0x8000  /* Advance NESN */
#define QM_EQCR_SEQNUM_NLIS             0x4000  /* More fragments to come */
#define QM_EQCR_SEQNUM_SEQMASK          0x3fff  /* sequence number goes here */

struct qm_eqcr {
        struct qm_eqcr_entry *ring, *cursor;
        u8 ci, available, ithresh, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
        u32 busy;
        enum qm_eqcr_pmode pmode;
#endif
};

struct qm_dqrr {
        const struct qm_dqrr_entry *ring, *cursor;
        u8 pi, ci, fill, ithresh, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
        enum qm_dqrr_dmode dmode;
        enum qm_dqrr_pmode pmode;
        enum qm_dqrr_cmode cmode;
#endif
};

struct qm_mr {
        union qm_mr_entry *ring, *cursor;
        u8 pi, ci, fill, ithresh, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
        enum qm_mr_pmode pmode;
        enum qm_mr_cmode cmode;
#endif
};

/* MC (Management Command) command */
/* "FQ" command layout */
struct qm_mcc_fq {
        u8 _ncw_verb;
        u8 __reserved1[3];
        __be32 fqid;    /* 24-bit */
        u8 __reserved2[56];
} __packed;

/* "CGR" command layout */
struct qm_mcc_cgr {
        u8 _ncw_verb;
        u8 __reserved1[30];
        u8 cgid;
        u8 __reserved2[32];
};

#define QM_MCC_VERB_VBIT                0x80
#define QM_MCC_VERB_MASK                0x7f    /* where the verb contains; */
#define QM_MCC_VERB_INITFQ_PARKED       0x40
#define QM_MCC_VERB_INITFQ_SCHED        0x41
#define QM_MCC_VERB_QUERYFQ             0x44
#define QM_MCC_VERB_QUERYFQ_NP          0x45    /* "non-programmable" fields */
#define QM_MCC_VERB_QUERYWQ             0x46
#define QM_MCC_VERB_QUERYWQ_DEDICATED   0x47
#define QM_MCC_VERB_ALTER_SCHED         0x48    /* Schedule FQ */
#define QM_MCC_VERB_ALTER_FE            0x49    /* Force Eligible FQ */
#define QM_MCC_VERB_ALTER_RETIRE        0x4a    /* Retire FQ */
#define QM_MCC_VERB_ALTER_OOS           0x4b    /* Take FQ out of service */
#define QM_MCC_VERB_ALTER_FQXON         0x4d    /* FQ XON */
#define QM_MCC_VERB_ALTER_FQXOFF        0x4e    /* FQ XOFF */
#define QM_MCC_VERB_INITCGR             0x50
#define QM_MCC_VERB_MODIFYCGR           0x51
#define QM_MCC_VERB_CGRTESTWRITE        0x52
#define QM_MCC_VERB_QUERYCGR            0x58
#define QM_MCC_VERB_QUERYCONGESTION     0x59
union qm_mc_command {
        struct {
                u8 _ncw_verb; /* writes to this are non-coherent */
                u8 __reserved[63];
        };
        struct qm_mcc_initfq initfq;
        struct qm_mcc_initcgr initcgr;
        struct qm_mcc_fq fq;
        struct qm_mcc_cgr cgr;
};

/* MC (Management Command) result */
/* "Query FQ" */
struct qm_mcr_queryfq {
        u8 verb;
        u8 result;
        u8 __reserved1[8];
        struct qm_fqd fqd;      /* the FQD fields are here */
        u8 __reserved2[30];
} __packed;

/* "Alter FQ State Commands" */
struct qm_mcr_alterfq {
        u8 verb;
        u8 result;
        u8 fqs;         /* Frame Queue Status */
        u8 __reserved1[61];
};
#define QM_MCR_VERB_RRID                0x80
#define QM_MCR_VERB_MASK                QM_MCC_VERB_MASK
#define QM_MCR_VERB_INITFQ_PARKED       QM_MCC_VERB_INITFQ_PARKED
#define QM_MCR_VERB_INITFQ_SCHED        QM_MCC_VERB_INITFQ_SCHED
#define QM_MCR_VERB_QUERYFQ             QM_MCC_VERB_QUERYFQ
#define QM_MCR_VERB_QUERYFQ_NP          QM_MCC_VERB_QUERYFQ_NP
#define QM_MCR_VERB_QUERYWQ             QM_MCC_VERB_QUERYWQ
#define QM_MCR_VERB_QUERYWQ_DEDICATED   QM_MCC_VERB_QUERYWQ_DEDICATED
#define QM_MCR_VERB_ALTER_SCHED         QM_MCC_VERB_ALTER_SCHED
#define QM_MCR_VERB_ALTER_FE            QM_MCC_VERB_ALTER_FE
#define QM_MCR_VERB_ALTER_RETIRE        QM_MCC_VERB_ALTER_RETIRE
#define QM_MCR_VERB_ALTER_OOS           QM_MCC_VERB_ALTER_OOS
#define QM_MCR_RESULT_NULL              0x00
#define QM_MCR_RESULT_OK                0xf0
#define QM_MCR_RESULT_ERR_FQID          0xf1
#define QM_MCR_RESULT_ERR_FQSTATE       0xf2
#define QM_MCR_RESULT_ERR_NOTEMPTY      0xf3    /* OOS fails if FQ is !empty */
#define QM_MCR_RESULT_ERR_BADCHANNEL    0xf4
#define QM_MCR_RESULT_PENDING           0xf8
#define QM_MCR_RESULT_ERR_BADCOMMAND    0xff
#define QM_MCR_FQS_ORLPRESENT           0x02    /* ORL fragments to come */
#define QM_MCR_FQS_NOTEMPTY             0x01    /* FQ has enqueued frames */
#define QM_MCR_TIMEOUT                  10000   /* us */
union qm_mc_result {
        struct {
                u8 verb;
                u8 result;
                u8 __reserved1[62];
        };
        struct qm_mcr_queryfq queryfq;
        struct qm_mcr_alterfq alterfq;
        struct qm_mcr_querycgr querycgr;
        struct qm_mcr_querycongestion querycongestion;
        struct qm_mcr_querywq querywq;
        struct qm_mcr_queryfq_np queryfq_np;
};

struct qm_mc {
        union qm_mc_command *cr;
        union qm_mc_result *rr;
        u8 rridx, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
        enum {
                /* Can be _mc_start()ed */
                qman_mc_idle,
                /* Can be _mc_commit()ed or _mc_abort()ed */
                qman_mc_user,
                /* Can only be _mc_retry()ed */
                qman_mc_hw
        } state;
#endif
};

struct qm_addr {
        void *ce;               /* cache-enabled */
        __be32 *ce_be;          /* same value as above but for direct access */
        void __iomem *ci;       /* cache-inhibited */
};

struct qm_portal {
        /*
         * In the non-CONFIG_FSL_DPAA_CHECKING case, the following stuff up to
         * and including 'mc' fits within a cacheline (yay!). The 'config' part
         * is setup-only, so isn't a cause for a concern. In other words, don't
         * rearrange this structure on a whim, there be dragons ...
         */
        struct qm_addr addr;
        struct qm_eqcr eqcr;
        struct qm_dqrr dqrr;
        struct qm_mr mr;
        struct qm_mc mc;
} ____cacheline_aligned;

/* Cache-inhibited register access. */
static inline u32 qm_in(struct qm_portal *p, u32 offset)
{
        return ioread32be(p->addr.ci + offset);
}

static inline void qm_out(struct qm_portal *p, u32 offset, u32 val)
{
        iowrite32be(val, p->addr.ci + offset);
}

/* Cache Enabled Portal Access */
static inline void qm_cl_invalidate(struct qm_portal *p, u32 offset)
{
        dpaa_invalidate(p->addr.ce + offset);
}

static inline void qm_cl_touch_ro(struct qm_portal *p, u32 offset)
{
        dpaa_touch_ro(p->addr.ce + offset);
}

static inline u32 qm_ce_in(struct qm_portal *p, u32 offset)
{
        return be32_to_cpu(*(p->addr.ce_be + (offset/4)));
}

/* --- EQCR API --- */

#define EQCR_SHIFT      ilog2(sizeof(struct qm_eqcr_entry))
#define EQCR_CARRY      (uintptr_t)(QM_EQCR_SIZE << EQCR_SHIFT)

/* Bit-wise logic to wrap a ring pointer by clearing the "carry bit" */
static struct qm_eqcr_entry *eqcr_carryclear(struct qm_eqcr_entry *p)
{
        uintptr_t addr = (uintptr_t)p;

        addr &= ~EQCR_CARRY;

        return (struct qm_eqcr_entry *)addr;
}

/* Bit-wise logic to convert a ring pointer to a ring index */
static int eqcr_ptr2idx(struct qm_eqcr_entry *e)
{
        return ((uintptr_t)e >> EQCR_SHIFT) & (QM_EQCR_SIZE - 1);
}

/* Increment the 'cursor' ring pointer, taking 'vbit' into account */
static inline void eqcr_inc(struct qm_eqcr *eqcr)
{
        /* increment to the next EQCR pointer and handle overflow and 'vbit' */
        struct qm_eqcr_entry *partial = eqcr->cursor + 1;

        eqcr->cursor = eqcr_carryclear(partial);
        if (partial != eqcr->cursor)
                eqcr->vbit ^= QM_EQCR_VERB_VBIT;
}

static inline int qm_eqcr_init(struct qm_portal *portal,
                                enum qm_eqcr_pmode pmode,
                                unsigned int eq_stash_thresh,
                                int eq_stash_prio)
{
        struct qm_eqcr *eqcr = &portal->eqcr;
        u32 cfg;
        u8 pi;

        eqcr->ring = portal->addr.ce + QM_CL_EQCR;
        eqcr->ci = qm_in(portal, QM_REG_EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);
        qm_cl_invalidate(portal, QM_CL_EQCR_CI_CENA);
        pi = qm_in(portal, QM_REG_EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
        eqcr->cursor = eqcr->ring + pi;
        eqcr->vbit = (qm_in(portal, QM_REG_EQCR_PI_CINH) & QM_EQCR_SIZE) ?
                     QM_EQCR_VERB_VBIT : 0;
        eqcr->available = QM_EQCR_SIZE - 1 -
                          dpaa_cyc_diff(QM_EQCR_SIZE, eqcr->ci, pi);
        eqcr->ithresh = qm_in(portal, QM_REG_EQCR_ITR);
#ifdef CONFIG_FSL_DPAA_CHECKING
        eqcr->busy = 0;
        eqcr->pmode = pmode;
#endif
        cfg = (qm_in(portal, QM_REG_CFG) & 0x00ffffff) |
              (eq_stash_thresh << 28) | /* QCSP_CFG: EST */
              (eq_stash_prio << 26) | /* QCSP_CFG: EP */
              ((pmode & 0x3) << 24); /* QCSP_CFG::EPM */
        qm_out(portal, QM_REG_CFG, cfg);
        return 0;
}

static inline unsigned int qm_eqcr_get_ci_stashing(struct qm_portal *portal)
{
        return (qm_in(portal, QM_REG_CFG) >> 28) & 0x7;
}

static inline void qm_eqcr_finish(struct qm_portal *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;
        u8 pi = qm_in(portal, QM_REG_EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
        u8 ci = qm_in(portal, QM_REG_EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);

        DPAA_ASSERT(!eqcr->busy);
        if (pi != eqcr_ptr2idx(eqcr->cursor))
                pr_crit("losing uncommitted EQCR entries\n");
        if (ci != eqcr->ci)
                pr_crit("missing existing EQCR completions\n");
        if (eqcr->ci != eqcr_ptr2idx(eqcr->cursor))
                pr_crit("EQCR destroyed unquiesced\n");
}

static inline struct qm_eqcr_entry *qm_eqcr_start_no_stash(struct qm_portal
                                                                 *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;

        DPAA_ASSERT(!eqcr->busy);
        if (!eqcr->available)
                return NULL;

#ifdef CONFIG_FSL_DPAA_CHECKING
        eqcr->busy = 1;
#endif
        dpaa_zero(eqcr->cursor);
        return eqcr->cursor;
}

static inline struct qm_eqcr_entry *qm_eqcr_start_stash(struct qm_portal
                                                                *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;
        u8 diff, old_ci;

        DPAA_ASSERT(!eqcr->busy);
        if (!eqcr->available) {
                old_ci = eqcr->ci;
                eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) &
                           (QM_EQCR_SIZE - 1);
                diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
                eqcr->available += diff;
                if (!diff)
                        return NULL;
        }
#ifdef CONFIG_FSL_DPAA_CHECKING
        eqcr->busy = 1;
#endif
        dpaa_zero(eqcr->cursor);
        return eqcr->cursor;
}

static inline void eqcr_commit_checks(struct qm_eqcr *eqcr)
{
        DPAA_ASSERT(eqcr->busy);
        DPAA_ASSERT(!(be32_to_cpu(eqcr->cursor->fqid) & ~QM_FQID_MASK));
        DPAA_ASSERT(eqcr->available >= 1);
}

static inline void qm_eqcr_pvb_commit(struct qm_portal *portal, u8 myverb)
{
        struct qm_eqcr *eqcr = &portal->eqcr;
        struct qm_eqcr_entry *eqcursor;

        eqcr_commit_checks(eqcr);
        DPAA_ASSERT(eqcr->pmode == qm_eqcr_pvb);
        dma_wmb();
        eqcursor = eqcr->cursor;
        eqcursor->_ncw_verb = myverb | eqcr->vbit;
        dpaa_flush(eqcursor);
        eqcr_inc(eqcr);
        eqcr->available--;
#ifdef CONFIG_FSL_DPAA_CHECKING
        eqcr->busy = 0;
#endif
}

static inline void qm_eqcr_cce_prefetch(struct qm_portal *portal)
{
        qm_cl_touch_ro(portal, QM_CL_EQCR_CI_CENA);
}

static inline u8 qm_eqcr_cce_update(struct qm_portal *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;
        u8 diff, old_ci = eqcr->ci;

        eqcr->ci = qm_ce_in(portal, QM_CL_EQCR_CI_CENA) & (QM_EQCR_SIZE - 1);
        qm_cl_invalidate(portal, QM_CL_EQCR_CI_CENA);
        diff = dpaa_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
        eqcr->available += diff;
        return diff;
}

static inline void qm_eqcr_set_ithresh(struct qm_portal *portal, u8 ithresh)
{
        struct qm_eqcr *eqcr = &portal->eqcr;

        eqcr->ithresh = ithresh;
        qm_out(portal, QM_REG_EQCR_ITR, ithresh);
}

static inline u8 qm_eqcr_get_avail(struct qm_portal *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;

        return eqcr->available;
}

static inline u8 qm_eqcr_get_fill(struct qm_portal *portal)
{
        struct qm_eqcr *eqcr = &portal->eqcr;

        return QM_EQCR_SIZE - 1 - eqcr->available;
}

/* --- DQRR API --- */

#define DQRR_SHIFT      ilog2(sizeof(struct qm_dqrr_entry))
#define DQRR_CARRY      (uintptr_t)(QM_DQRR_SIZE << DQRR_SHIFT)

static const struct qm_dqrr_entry *dqrr_carryclear(
                                        const struct qm_dqrr_entry *p)
{
        uintptr_t addr = (uintptr_t)p;

        addr &= ~DQRR_CARRY;

        return (const struct qm_dqrr_entry *)addr;
}

static inline int dqrr_ptr2idx(const struct qm_dqrr_entry *e)
{
        return ((uintptr_t)e >> DQRR_SHIFT) & (QM_DQRR_SIZE - 1);
}

static const struct qm_dqrr_entry *dqrr_inc(const struct qm_dqrr_entry *e)
{
        return dqrr_carryclear(e + 1);
}

static inline void qm_dqrr_set_maxfill(struct qm_portal *portal, u8 mf)
{
        qm_out(portal, QM_REG_CFG, (qm_in(portal, QM_REG_CFG) & 0xff0fffff) |
                                   ((mf & (QM_DQRR_SIZE - 1)) << 20));
}

static inline int qm_dqrr_init(struct qm_portal *portal,
                               const struct qm_portal_config *config,
                               enum qm_dqrr_dmode dmode,
                               enum qm_dqrr_pmode pmode,
                               enum qm_dqrr_cmode cmode, u8 max_fill)
{
        struct qm_dqrr *dqrr = &portal->dqrr;
        u32 cfg;

        /* Make sure the DQRR will be idle when we enable */
        qm_out(portal, QM_REG_DQRR_SDQCR, 0);
        qm_out(portal, QM_REG_DQRR_VDQCR, 0);
        qm_out(portal, QM_REG_DQRR_PDQCR, 0);
        dqrr->ring = portal->addr.ce + QM_CL_DQRR;
        dqrr->pi = qm_in(portal, QM_REG_DQRR_PI_CINH) & (QM_DQRR_SIZE - 1);
        dqrr->ci = qm_in(portal, QM_REG_DQRR_CI_CINH) & (QM_DQRR_SIZE - 1);
        dqrr->cursor = dqrr->ring + dqrr->ci;
        dqrr->fill = dpaa_cyc_diff(QM_DQRR_SIZE, dqrr->ci, dqrr->pi);
        dqrr->vbit = (qm_in(portal, QM_REG_DQRR_PI_CINH) & QM_DQRR_SIZE) ?
                        QM_DQRR_VERB_VBIT : 0;
        dqrr->ithresh = qm_in(portal, QM_REG_DQRR_ITR);
#ifdef CONFIG_FSL_DPAA_CHECKING
        dqrr->dmode = dmode;
        dqrr->pmode = pmode;
        dqrr->cmode = cmode;
#endif
        /* Invalidate every ring entry before beginning */
        for (cfg = 0; cfg < QM_DQRR_SIZE; cfg++)
                dpaa_invalidate(qm_cl(dqrr->ring, cfg));
        cfg = (qm_in(portal, QM_REG_CFG) & 0xff000f00) |
                ((max_fill & (QM_DQRR_SIZE - 1)) << 20) | /* DQRR_MF */
                ((dmode & 1) << 18) |                   /* DP */
                ((cmode & 3) << 16) |                   /* DCM */
                0xa0 |                                  /* RE+SE */
                (0 ? 0x40 : 0) |                        /* Ignore RP */
                (0 ? 0x10 : 0);                         /* Ignore SP */
        qm_out(portal, QM_REG_CFG, cfg);
        qm_dqrr_set_maxfill(portal, max_fill);
        return 0;
}

static inline void qm_dqrr_finish(struct qm_portal *portal)
{
#ifdef CONFIG_FSL_DPAA_CHECKING
        struct qm_dqrr *dqrr = &portal->dqrr;

        if (dqrr->cmode != qm_dqrr_cdc &&
            dqrr->ci != dqrr_ptr2idx(dqrr->cursor))
                pr_crit("Ignoring completed DQRR entries\n");
#endif
}

static inline const struct qm_dqrr_entry *qm_dqrr_current(
                                                struct qm_portal *portal)
{
        struct qm_dqrr *dqrr = &portal->dqrr;

        if (!dqrr->fill)
                return NULL;
        return dqrr->cursor;
}

static inline u8 qm_dqrr_next(struct qm_portal *portal)
{
        struct qm_dqrr *dqrr = &portal->dqrr;

        DPAA_ASSERT(dqrr->fill);
        dqrr->cursor = dqrr_inc(dqrr->cursor);
        return --dqrr->fill;
}

static inline void qm_dqrr_pvb_update(struct qm_portal *portal)
{
        struct qm_dqrr *dqrr = &portal->dqrr;
        struct qm_dqrr_entry *res = qm_cl(dqrr->ring, dqrr->pi);

        DPAA_ASSERT(dqrr->pmode == qm_dqrr_pvb);
#ifndef CONFIG_FSL_PAMU
        /*
         * If PAMU is not available we need to invalidate the cache.
         * When PAMU is available the cache is updated by stash
         */
        dpaa_invalidate_touch_ro(res);
#endif
        if ((res->verb & QM_DQRR_VERB_VBIT) == dqrr->vbit) {
                dqrr->pi = (dqrr->pi + 1) & (QM_DQRR_SIZE - 1);
                if (!dqrr->pi)
                        dqrr->vbit ^= QM_DQRR_VERB_VBIT;
                dqrr->fill++;
        }
}

static inline void qm_dqrr_cdc_consume_1ptr(struct qm_portal *portal,
                                        const struct qm_dqrr_entry *dq,
                                        int park)
{
        __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;
        int idx = dqrr_ptr2idx(dq);

        DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
        DPAA_ASSERT((dqrr->ring + idx) == dq);
        DPAA_ASSERT(idx < QM_DQRR_SIZE);
        qm_out(portal, QM_REG_DQRR_DCAP, (0 << 8) | /* DQRR_DCAP::S */
               ((park ? 1 : 0) << 6) |              /* DQRR_DCAP::PK */
               idx);                                /* DQRR_DCAP::DCAP_CI */
}

static inline void qm_dqrr_cdc_consume_n(struct qm_portal *portal, u32 bitmask)
{
        __maybe_unused struct qm_dqrr *dqrr = &portal->dqrr;

        DPAA_ASSERT(dqrr->cmode == qm_dqrr_cdc);
        qm_out(portal, QM_REG_DQRR_DCAP, (1 << 8) | /* DQRR_DCAP::S */
               (bitmask << 16));                    /* DQRR_DCAP::DCAP_CI */
}

static inline void qm_dqrr_sdqcr_set(struct qm_portal *portal, u32 sdqcr)
{
        qm_out(portal, QM_REG_DQRR_SDQCR, sdqcr);
}

static inline void qm_dqrr_vdqcr_set(struct qm_portal *portal, u32 vdqcr)
{
        qm_out(portal, QM_REG_DQRR_VDQCR, vdqcr);
}

static inline void qm_dqrr_set_ithresh(struct qm_portal *portal, u8 ithresh)
{
        qm_out(portal, QM_REG_DQRR_ITR, ithresh);
}

/* --- MR API --- */

#define MR_SHIFT        ilog2(sizeof(union qm_mr_entry))
#define MR_CARRY        (uintptr_t)(QM_MR_SIZE << MR_SHIFT)

static union qm_mr_entry *mr_carryclear(union qm_mr_entry *p)
{
        uintptr_t addr = (uintptr_t)p;

        addr &= ~MR_CARRY;

        return (union qm_mr_entry *)addr;
}

static inline int mr_ptr2idx(const union qm_mr_entry *e)
{
        return ((uintptr_t)e >> MR_SHIFT) & (QM_MR_SIZE - 1);
}

static inline union qm_mr_entry *mr_inc(union qm_mr_entry *e)
{
        return mr_carryclear(e + 1);
}

static inline int qm_mr_init(struct qm_portal *portal, enum qm_mr_pmode pmode,
                             enum qm_mr_cmode cmode)
{
        struct qm_mr *mr = &portal->mr;
        u32 cfg;

        mr->ring = portal->addr.ce + QM_CL_MR;
        mr->pi = qm_in(portal, QM_REG_MR_PI_CINH) & (QM_MR_SIZE - 1);
        mr->ci = qm_in(portal, QM_REG_MR_CI_CINH) & (QM_MR_SIZE - 1);
        mr->cursor = mr->ring + mr->ci;
        mr->fill = dpaa_cyc_diff(QM_MR_SIZE, mr->ci, mr->pi);
        mr->vbit = (qm_in(portal, QM_REG_MR_PI_CINH) & QM_MR_SIZE)
                ? QM_MR_VERB_VBIT : 0;
        mr->ithresh = qm_in(portal, QM_REG_MR_ITR);
#ifdef CONFIG_FSL_DPAA_CHECKING
        mr->pmode = pmode;
        mr->cmode = cmode;
#endif
        cfg = (qm_in(portal, QM_REG_CFG) & 0xfffff0ff) |
              ((cmode & 1) << 8);       /* QCSP_CFG:MM */
        qm_out(portal, QM_REG_CFG, cfg);
        return 0;
}

static inline void qm_mr_finish(struct qm_portal *portal)
{
        struct qm_mr *mr = &portal->mr;

        if (mr->ci != mr_ptr2idx(mr->cursor))
                pr_crit("Ignoring completed MR entries\n");
}

static inline const union qm_mr_entry *qm_mr_current(struct qm_portal *portal)
{
        struct qm_mr *mr = &portal->mr;

        if (!mr->fill)
                return NULL;
        return mr->cursor;
}

static inline int qm_mr_next(struct qm_portal *portal)
{
        struct qm_mr *mr = &portal->mr;

        DPAA_ASSERT(mr->fill);
        mr->cursor = mr_inc(mr->cursor);
        return --mr->fill;
}

static inline void qm_mr_pvb_update(struct qm_portal *portal)
{
        struct qm_mr *mr = &portal->mr;
        union qm_mr_entry *res = qm_cl(mr->ring, mr->pi);

        DPAA_ASSERT(mr->pmode == qm_mr_pvb);

        if ((res->verb & QM_MR_VERB_VBIT) == mr->vbit) {
                mr->pi = (mr->pi + 1) & (QM_MR_SIZE - 1);
                if (!mr->pi)
                        mr->vbit ^= QM_MR_VERB_VBIT;
                mr->fill++;
                res = mr_inc(res);
        }
        dpaa_invalidate_touch_ro(res);
}

static inline void qm_mr_cci_consume(struct qm_portal *portal, u8 num)
{
        struct qm_mr *mr = &portal->mr;

        DPAA_ASSERT(mr->cmode == qm_mr_cci);
        mr->ci = (mr->ci + num) & (QM_MR_SIZE - 1);
        qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
}

static inline void qm_mr_cci_consume_to_current(struct qm_portal *portal)
{
        struct qm_mr *mr = &portal->mr;

        DPAA_ASSERT(mr->cmode == qm_mr_cci);
        mr->ci = mr_ptr2idx(mr->cursor);
        qm_out(portal, QM_REG_MR_CI_CINH, mr->ci);
}

static inline void qm_mr_set_ithresh(struct qm_portal *portal, u8 ithresh)
{
        qm_out(portal, QM_REG_MR_ITR, ithresh);
}

/* --- Management command API --- */

static inline int qm_mc_init(struct qm_portal *portal)
{
        struct qm_mc *mc = &portal->mc;

        mc->cr = portal->addr.ce + QM_CL_CR;
        mc->rr = portal->addr.ce + QM_CL_RR0;
        mc->rridx = (mc->cr->_ncw_verb & QM_MCC_VERB_VBIT)
                    ? 0 : 1;
        mc->vbit = mc->rridx ? QM_MCC_VERB_VBIT : 0;
#ifdef CONFIG_FSL_DPAA_CHECKING
        mc->state = qman_mc_idle;
#endif
        return 0;
}

static inline void qm_mc_finish(struct qm_portal *portal)
{
#ifdef CONFIG_FSL_DPAA_CHECKING
        struct qm_mc *mc = &portal->mc;

        DPAA_ASSERT(mc->state == qman_mc_idle);
        if (mc->state != qman_mc_idle)
                pr_crit("Losing incomplete MC command\n");
#endif
}

static inline union qm_mc_command *qm_mc_start(struct qm_portal *portal)
{
        struct qm_mc *mc = &portal->mc;

        DPAA_ASSERT(mc->state == qman_mc_idle);
#ifdef CONFIG_FSL_DPAA_CHECKING
        mc->state = qman_mc_user;
#endif
        dpaa_zero(mc->cr);
        return mc->cr;
}

static inline void qm_mc_commit(struct qm_portal *portal, u8 myverb)
{
        struct qm_mc *mc = &portal->mc;
        union qm_mc_result *rr = mc->rr + mc->rridx;

        DPAA_ASSERT(mc->state == qman_mc_user);
        dma_wmb();
        mc->cr->_ncw_verb = myverb | mc->vbit;
        dpaa_flush(mc->cr);
        dpaa_invalidate_touch_ro(rr);
#ifdef CONFIG_FSL_DPAA_CHECKING
        mc->state = qman_mc_hw;
#endif
}

static inline union qm_mc_result *qm_mc_result(struct qm_portal *portal)
{
        struct qm_mc *mc = &portal->mc;
        union qm_mc_result *rr = mc->rr + mc->rridx;

        DPAA_ASSERT(mc->state == qman_mc_hw);
        /*
         *  The inactive response register's verb byte always returns zero until
         * its command is submitted and completed. This includes the valid-bit,
         * in case you were wondering...
         */
        if (!rr->verb) {
                dpaa_invalidate_touch_ro(rr);
                return NULL;
        }
        mc->rridx ^= 1;
        mc->vbit ^= QM_MCC_VERB_VBIT;
#ifdef CONFIG_FSL_DPAA_CHECKING
        mc->state = qman_mc_idle;
#endif
        return rr;
}

static inline int qm_mc_result_timeout(struct qm_portal *portal,
                                       union qm_mc_result **mcr)
{
        int timeout = QM_MCR_TIMEOUT;

        do {
                *mcr = qm_mc_result(portal);
                if (*mcr)
                        break;
                udelay(1);
        } while (--timeout);

        return timeout;
}

static inline void fq_set(struct qman_fq *fq, u32 mask)
{
        fq->flags |= mask;
}

static inline void fq_clear(struct qman_fq *fq, u32 mask)
{
        fq->flags &= ~mask;
}

static inline int fq_isset(struct qman_fq *fq, u32 mask)
{
        return fq->flags & mask;
}

static inline int fq_isclear(struct qman_fq *fq, u32 mask)
{
        return !(fq->flags & mask);
}

struct qman_portal {
        struct qm_portal p;
        /* PORTAL_BITS_*** - dynamic, strictly internal */
        unsigned long bits;
        /* interrupt sources processed by portal_isr(), configurable */
        unsigned long irq_sources;
        u32 use_eqcr_ci_stashing;
        /* only 1 volatile dequeue at a time */
        struct qman_fq *vdqcr_owned;
        u32 sdqcr;
        /* probing time config params for cpu-affine portals */
        const struct qm_portal_config *config;
        /* 2-element array. cgrs[0] is mask, cgrs[1] is snapshot. */
        struct qman_cgrs *cgrs;
        /* linked-list of CSCN handlers. */
        struct list_head cgr_cbs;
        /* list lock */
        spinlock_t cgr_lock;
        struct work_struct congestion_work;
        struct work_struct mr_work;
        char irqname[MAX_IRQNAME];
};

static cpumask_t affine_mask;
static DEFINE_SPINLOCK(affine_mask_lock);
static u16 affine_channels[NR_CPUS];
static DEFINE_PER_CPU(struct qman_portal, qman_affine_portal);
struct qman_portal *affine_portals[NR_CPUS];

static inline struct qman_portal *get_affine_portal(void)
{
        return &get_cpu_var(qman_affine_portal);
}

static inline void put_affine_portal(void)
{
        put_cpu_var(qman_affine_portal);
}

static struct workqueue_struct *qm_portal_wq;

int qman_wq_alloc(void)
{
        qm_portal_wq = alloc_workqueue("qman_portal_wq", 0, 1);
        if (!qm_portal_wq)
                return -ENOMEM;
        return 0;
}

/*
 * This is what everything can wait on, even if it migrates to a different cpu
 * to the one whose affine portal it is waiting on.
 */
static DECLARE_WAIT_QUEUE_HEAD(affine_queue);

static struct qman_fq **fq_table;
static u32 num_fqids;

int qman_alloc_fq_table(u32 _num_fqids)
{
        num_fqids = _num_fqids;

        fq_table = vzalloc(num_fqids * 2 * sizeof(struct qman_fq *));
        if (!fq_table)
                return -ENOMEM;

        pr_debug("Allocated fq lookup table at %p, entry count %u\n",
                 fq_table, num_fqids * 2);
        return 0;
}

static struct qman_fq *idx_to_fq(u32 idx)
{
        struct qman_fq *fq;

#ifdef CONFIG_FSL_DPAA_CHECKING
        if (WARN_ON(idx >= num_fqids * 2))
                return NULL;
#endif
        fq = fq_table[idx];
        DPAA_ASSERT(!fq || idx == fq->idx);

        return fq;
}

/*
 * Only returns full-service fq objects, not enqueue-only
 * references (QMAN_FQ_FLAG_NO_MODIFY).
 */
static struct qman_fq *fqid_to_fq(u32 fqid)
{
        return idx_to_fq(fqid * 2);
}

static struct qman_fq *tag_to_fq(u32 tag)
{
#if BITS_PER_LONG == 64
        return idx_to_fq(tag);
#else
        return (struct qman_fq *)tag;
#endif
}

static u32 fq_to_tag(struct qman_fq *fq)
{
#if BITS_PER_LONG == 64
        return fq->idx;
#else
        return (u32)fq;
#endif
}

static u32 __poll_portal_slow(struct qman_portal *p, u32 is);
static inline unsigned int __poll_portal_fast(struct qman_portal *p,
                                        unsigned int poll_limit);
static void qm_congestion_task(struct work_struct *work);
static void qm_mr_process_task(struct work_struct *work);

static irqreturn_t portal_isr(int irq, void *ptr)
{
        struct qman_portal *p = ptr;

        u32 clear = QM_DQAVAIL_MASK | p->irq_sources;
        u32 is = qm_in(&p->p, QM_REG_ISR) & p->irq_sources;

        if (unlikely(!is))
                return IRQ_NONE;

        /* DQRR-handling if it's interrupt-driven */
        if (is & QM_PIRQ_DQRI)
                __poll_portal_fast(p, QMAN_POLL_LIMIT);
        /* Handling of anything else that's interrupt-driven */
        clear |= __poll_portal_slow(p, is);
        qm_out(&p->p, QM_REG_ISR, clear);
        return IRQ_HANDLED;
}

static int drain_mr_fqrni(struct qm_portal *p)
{
        const union qm_mr_entry *msg;
loop:
        msg = qm_mr_current(p);
        if (!msg) {
                /*
                 * if MR was full and h/w had other FQRNI entries to produce, we
                 * need to allow it time to produce those entries once the
                 * existing entries are consumed. A worst-case situation
                 * (fully-loaded system) means h/w sequencers may have to do 3-4
                 * other things before servicing the portal's MR pump, each of
                 * which (if slow) may take ~50 qman cycles (which is ~200
                 * processor cycles). So rounding up and then multiplying this
                 * worst-case estimate by a factor of 10, just to be
                 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
                 * one entry at a time, so h/w has an opportunity to produce new
                 * entries well before the ring has been fully consumed, so
                 * we're being *really* paranoid here.
                 */
                msleep(1);
                msg = qm_mr_current(p);
                if (!msg)
                        return 0;
        }
        if ((msg->verb & QM_MR_VERB_TYPE_MASK) != QM_MR_VERB_FQRNI) {
                /* We aren't draining anything but FQRNIs */
                pr_err("Found verb 0x%x in MR\n", msg->verb);
                return -1;
        }
        qm_mr_next(p);
        qm_mr_cci_consume(p, 1);
        goto loop;
}

static int qman_create_portal(struct qman_portal *portal,
                              const struct qm_portal_config *c,
                              const struct qman_cgrs *cgrs)
{
        struct qm_portal *p;
        int ret;
        u32 isdr;

        p = &portal->p;

#ifdef CONFIG_FSL_PAMU
        /* PAMU is required for stashing */
        portal->use_eqcr_ci_stashing = ((qman_ip_rev >= QMAN_REV30) ? 1 : 0);
#else
        portal->use_eqcr_ci_stashing = 0;
#endif
        /*
         * prep the low-level portal struct with the mapped addresses from the
         * config, everything that follows depends on it and "config" is more
         * for (de)reference
         */
        p->addr.ce = c->addr_virt_ce;
        p->addr.ce_be = c->addr_virt_ce;
        p->addr.ci = c->addr_virt_ci;
        /*
         * If CI-stashing is used, the current defaults use a threshold of 3,
         * and stash with high-than-DQRR priority.
         */
        if (qm_eqcr_init(p, qm_eqcr_pvb,
                        portal->use_eqcr_ci_stashing ? 3 : 0, 1)) {
                dev_err(c->dev, "EQCR initialisation failed\n");
                goto fail_eqcr;
        }
        if (qm_dqrr_init(p, c, qm_dqrr_dpush, qm_dqrr_pvb,
                        qm_dqrr_cdc, DQRR_MAXFILL)) {
                dev_err(c->dev, "DQRR initialisation failed\n");
                goto fail_dqrr;
        }
        if (qm_mr_init(p, qm_mr_pvb, qm_mr_cci)) {
                dev_err(c->dev, "MR initialisation failed\n");
                goto fail_mr;
        }
        if (qm_mc_init(p)) {
                dev_err(c->dev, "MC initialisation failed\n");
                goto fail_mc;
        }
        /* static interrupt-gating controls */
        qm_dqrr_set_ithresh(p, QMAN_PIRQ_DQRR_ITHRESH);
        qm_mr_set_ithresh(p, QMAN_PIRQ_MR_ITHRESH);
        qm_out(p, QM_REG_ITPR, QMAN_PIRQ_IPERIOD);
        portal->cgrs = kmalloc(2 * sizeof(*cgrs), GFP_KERNEL);
        if (!portal->cgrs)
                goto fail_cgrs;
        /* initial snapshot is no-depletion */
        qman_cgrs_init(&portal->cgrs[1]);
        if (cgrs)
                portal->cgrs[0] = *cgrs;
        else
                /* if the given mask is NULL, assume all CGRs can be seen */
                qman_cgrs_fill(&portal->cgrs[0]);
        INIT_LIST_HEAD(&portal->cgr_cbs);
        spin_lock_init(&portal->cgr_lock);
        INIT_WORK(&portal->congestion_work, qm_congestion_task);
        INIT_WORK(&portal->mr_work, qm_mr_process_task);
        portal->bits = 0;
        portal->sdqcr = QM_SDQCR_SOURCE_CHANNELS | QM_SDQCR_COUNT_UPTO3 |
                        QM_SDQCR_DEDICATED_PRECEDENCE | QM_SDQCR_TYPE_PRIO_QOS |
                        QM_SDQCR_TOKEN_SET(0xab) | QM_SDQCR_CHANNELS_DEDICATED;
        isdr = 0xffffffff;
        qm_out(p, QM_REG_ISDR, isdr);
        portal->irq_sources = 0;
        qm_out(p, QM_REG_IER, 0);
        qm_out(p, QM_REG_ISR, 0xffffffff);
        snprintf(portal->irqname, MAX_IRQNAME, IRQNAME, c->cpu);
        if (request_irq(c->irq, portal_isr, 0, portal->irqname, portal)) {
                dev_err(c->dev, "request_irq() failed\n");
                goto fail_irq;
        }
        if (c->cpu != -1 && irq_can_set_affinity(c->irq) &&
            irq_set_affinity(c->irq, cpumask_of(c->cpu))) {
                dev_err(c->dev, "irq_set_affinity() failed\n");
                goto fail_affinity;
        }

        /* Need EQCR to be empty before continuing */
        isdr &= ~QM_PIRQ_EQCI;
        qm_out(p, QM_REG_ISDR, isdr);
        ret = qm_eqcr_get_fill(p);
        if (ret) {
                dev_err(c->dev, "EQCR unclean\n");
                goto fail_eqcr_empty;
        }
        isdr &= ~(QM_PIRQ_DQRI | QM_PIRQ_MRI);
        qm_out(p, QM_REG_ISDR, isdr);
        if (qm_dqrr_current(p)) {
                dev_err(c->dev, "DQRR unclean\n");
                qm_dqrr_cdc_consume_n(p, 0xffff);
        }
        if (qm_mr_current(p) && drain_mr_fqrni(p)) {
                /* special handling, drain just in case it's a few FQRNIs */
                const union qm_mr_entry *e = qm_mr_current(p);

                dev_err(c->dev, "MR dirty, VB 0x%x, rc 0x%x, addr 0x%llx\n",
                        e->verb, e->ern.rc, qm_fd_addr_get64(&e->ern.fd));
                goto fail_dqrr_mr_empty;
        }
        /* Success */
        portal->config = c;
        qm_out(p, QM_REG_ISDR, 0);
        qm_out(p, QM_REG_IIR, 0);
        /* Write a sane SDQCR */
        qm_dqrr_sdqcr_set(p, portal->sdqcr);
        return 0;

fail_dqrr_mr_empty:
fail_eqcr_empty:
fail_affinity:
        free_irq(c->irq, portal);
fail_irq:
        kfree(portal->cgrs);
fail_cgrs:
        qm_mc_finish(p);
fail_mc:
        qm_mr_finish(p);
fail_mr:
        qm_dqrr_finish(p);
fail_dqrr:
        qm_eqcr_finish(p);
fail_eqcr:
        return -EIO;
}

struct qman_portal *qman_create_affine_portal(const struct qm_portal_config *c,
                                              const struct qman_cgrs *cgrs)
{
        struct qman_portal *portal;
        int err;

        portal = &per_cpu(qman_affine_portal, c->cpu);
        err = qman_create_portal(portal, c, cgrs);
        if (err)
                return NULL;

        spin_lock(&affine_mask_lock);
        cpumask_set_cpu(c->cpu, &affine_mask);
        affine_channels[c->cpu] = c->channel;
        affine_portals[c->cpu] = portal;
        spin_unlock(&affine_mask_lock);

        return portal;
}

static void qman_destroy_portal(struct qman_portal *qm)
{
        const struct qm_portal_config *pcfg;

        /* Stop dequeues on the portal */
        qm_dqrr_sdqcr_set(&qm->p, 0);

        /*
         * NB we do this to "quiesce" EQCR. If we add enqueue-completions or
         * something related to QM_PIRQ_EQCI, this may need fixing.
         * Also, due to the prefetching model used for CI updates in the enqueue
         * path, this update will only invalidate the CI cacheline *after*
         * working on it, so we need to call this twice to ensure a full update
         * irrespective of where the enqueue processing was at when the teardown
         * began.
         */
        qm_eqcr_cce_update(&qm->p);
        qm_eqcr_cce_update(&qm->p);
        pcfg = qm->config;

        free_irq(pcfg->irq, qm);

        kfree(qm->cgrs);
        qm_mc_finish(&qm->p);
        qm_mr_finish(&qm->p);
        qm_dqrr_finish(&qm->p);
        qm_eqcr_finish(&qm->p);

        qm->config = NULL;
}

const struct qm_portal_config *qman_destroy_affine_portal(void)
{
        struct qman_portal *qm = get_affine_portal();
        const struct qm_portal_config *pcfg;
        int cpu;

        pcfg = qm->config;
        cpu = pcfg->cpu;

        qman_destroy_portal(qm);

        spin_lock(&affine_mask_lock);
        cpumask_clear_cpu(cpu, &affine_mask);
        spin_unlock(&affine_mask_lock);
        put_affine_portal();
        return pcfg;
}

/* Inline helper to reduce nesting in __poll_portal_slow() */
static inline void fq_state_change(struct qman_portal *p, struct qman_fq *fq,
                                   const union qm_mr_entry *msg, u8 verb)
{
        switch (verb) {
        case QM_MR_VERB_FQRL:
                DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_ORL));
                fq_clear(fq, QMAN_FQ_STATE_ORL);
                break;
        case QM_MR_VERB_FQRN:
                DPAA_ASSERT(fq->state == qman_fq_state_parked ||
                            fq->state == qman_fq_state_sched);
                DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_CHANGING));
                fq_clear(fq, QMAN_FQ_STATE_CHANGING);
                if (msg->fq.fqs & QM_MR_FQS_NOTEMPTY)
                        fq_set(fq, QMAN_FQ_STATE_NE);
                if (msg->fq.fqs & QM_MR_FQS_ORLPRESENT)
                        fq_set(fq, QMAN_FQ_STATE_ORL);
                fq->state = qman_fq_state_retired;
                break;
        case QM_MR_VERB_FQPN:
                DPAA_ASSERT(fq->state == qman_fq_state_sched);
                DPAA_ASSERT(fq_isclear(fq, QMAN_FQ_STATE_CHANGING));
                fq->state = qman_fq_state_parked;
        }
}

static void qm_congestion_task(struct work_struct *work)
{
        struct qman_portal *p = container_of(work, struct qman_portal,
                                             congestion_work);
        struct qman_cgrs rr, c;
        union qm_mc_result *mcr;
        struct qman_cgr *cgr;

        spin_lock(&p->cgr_lock);
        qm_mc_start(&p->p);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCONGESTION);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                spin_unlock(&p->cgr_lock);
                dev_crit(p->config->dev, "QUERYCONGESTION timeout\n");
                qman_p_irqsource_add(p, QM_PIRQ_CSCI);
                return;
        }
        /* mask out the ones I'm not interested in */
        qman_cgrs_and(&rr, (struct qman_cgrs *)&mcr->querycongestion.state,
                      &p->cgrs[0]);
        /* check previous snapshot for delta, enter/exit congestion */
        qman_cgrs_xor(&c, &rr, &p->cgrs[1]);
        /* update snapshot */
        qman_cgrs_cp(&p->cgrs[1], &rr);
        /* Invoke callback */
        list_for_each_entry(cgr, &p->cgr_cbs, node)
                if (cgr->cb && qman_cgrs_get(&c, cgr->cgrid))
                        cgr->cb(p, cgr, qman_cgrs_get(&rr, cgr->cgrid));
        spin_unlock(&p->cgr_lock);
        qman_p_irqsource_add(p, QM_PIRQ_CSCI);
}

static void qm_mr_process_task(struct work_struct *work)
{
        struct qman_portal *p = container_of(work, struct qman_portal,
                                             mr_work);
        const union qm_mr_entry *msg;
        struct qman_fq *fq;
        u8 verb, num = 0;

        preempt_disable();

        while (1) {
                qm_mr_pvb_update(&p->p);
                msg = qm_mr_current(&p->p);
                if (!msg)
                        break;

                verb = msg->verb & QM_MR_VERB_TYPE_MASK;
                /* The message is a software ERN iff the 0x20 bit is clear */
                if (verb & 0x20) {
                        switch (verb) {
                        case QM_MR_VERB_FQRNI:
                                /* nada, we drop FQRNIs on the floor */
                                break;
                        case QM_MR_VERB_FQRN:
                        case QM_MR_VERB_FQRL:
                                /* Lookup in the retirement table */
                                fq = fqid_to_fq(qm_fqid_get(&msg->fq));
                                if (WARN_ON(!fq))
                                        break;
                                fq_state_change(p, fq, msg, verb);
                                if (fq->cb.fqs)
                                        fq->cb.fqs(p, fq, msg);
                                break;
                        case QM_MR_VERB_FQPN:
                                /* Parked */
                                fq = tag_to_fq(be32_to_cpu(msg->fq.context_b));
                                fq_state_change(p, fq, msg, verb);
                                if (fq->cb.fqs)
                                        fq->cb.fqs(p, fq, msg);
                                break;
                        case QM_MR_VERB_DC_ERN:
                                /* DCP ERN */
                                pr_crit_once("Leaking DCP ERNs!\n");
                                break;
                        default:
                                pr_crit("Invalid MR verb 0x%02x\n", verb);
                        }
                } else {
                        /* Its a software ERN */
                        fq = tag_to_fq(be32_to_cpu(msg->ern.tag));
                        fq->cb.ern(p, fq, msg);
                }
                num++;
                qm_mr_next(&p->p);
        }

        qm_mr_cci_consume(&p->p, num);
        qman_p_irqsource_add(p, QM_PIRQ_MRI);
        preempt_enable();
}

static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
{
        if (is & QM_PIRQ_CSCI) {
                qman_p_irqsource_remove(p, QM_PIRQ_CSCI);
                queue_work_on(smp_processor_id(), qm_portal_wq,
                              &p->congestion_work);
        }

        if (is & QM_PIRQ_EQRI) {
                qm_eqcr_cce_update(&p->p);
                qm_eqcr_set_ithresh(&p->p, 0);
                wake_up(&affine_queue);
        }

        if (is & QM_PIRQ_MRI) {
                qman_p_irqsource_remove(p, QM_PIRQ_MRI);
                queue_work_on(smp_processor_id(), qm_portal_wq,
                              &p->mr_work);
        }

        return is;
}

/*
 * remove some slowish-path stuff from the "fast path" and make sure it isn't
 * inlined.
 */
static noinline void clear_vdqcr(struct qman_portal *p, struct qman_fq *fq)
{
        p->vdqcr_owned = NULL;
        fq_clear(fq, QMAN_FQ_STATE_VDQCR);
        wake_up(&affine_queue);
}

/*
 * The only states that would conflict with other things if they ran at the
 * same time on the same cpu are:
 *
 *   (i) setting/clearing vdqcr_owned, and
 *  (ii) clearing the NE (Not Empty) flag.
 *
 * Both are safe. Because;
 *
 *   (i) this clearing can only occur after qman_volatile_dequeue() has set the
 *       vdqcr_owned field (which it does before setting VDQCR), and
 *       qman_volatile_dequeue() blocks interrupts and preemption while this is
 *       done so that we can't interfere.
 *  (ii) the NE flag is only cleared after qman_retire_fq() has set it, and as
 *       with (i) that API prevents us from interfering until it's safe.
 *
 * The good thing is that qman_volatile_dequeue() and qman_retire_fq() run far
 * less frequently (ie. per-FQ) than __poll_portal_fast() does, so the nett
 * advantage comes from this function not having to "lock" anything at all.
 *
 * Note also that the callbacks are invoked at points which are safe against the
 * above potential conflicts, but that this function itself is not re-entrant
 * (this is because the function tracks one end of each FIFO in the portal and
 * we do *not* want to lock that). So the consequence is that it is safe for
 * user callbacks to call into any QMan API.
 */
static inline unsigned int __poll_portal_fast(struct qman_portal *p,
                                        unsigned int poll_limit)
{
        const struct qm_dqrr_entry *dq;
        struct qman_fq *fq;
        enum qman_cb_dqrr_result res;
        unsigned int limit = 0;

        do {
                qm_dqrr_pvb_update(&p->p);
                dq = qm_dqrr_current(&p->p);
                if (!dq)
                        break;

                if (dq->stat & QM_DQRR_STAT_UNSCHEDULED) {
                        /*
                         * VDQCR: don't trust context_b as the FQ may have
                         * been configured for h/w consumption and we're
                         * draining it post-retirement.
                         */
                        fq = p->vdqcr_owned;
                        /*
                         * We only set QMAN_FQ_STATE_NE when retiring, so we
                         * only need to check for clearing it when doing
                         * volatile dequeues.  It's one less thing to check
                         * in the critical path (SDQCR).
                         */
                        if (dq->stat & QM_DQRR_STAT_FQ_EMPTY)
                                fq_clear(fq, QMAN_FQ_STATE_NE);
                        /*
                         * This is duplicated from the SDQCR code, but we
                         * have stuff to do before *and* after this callback,
                         * and we don't want multiple if()s in the critical
                         * path (SDQCR).
                         */
                        res = fq->cb.dqrr(p, fq, dq);
                        if (res == qman_cb_dqrr_stop)
                                break;
                        /* Check for VDQCR completion */
                        if (dq->stat & QM_DQRR_STAT_DQCR_EXPIRED)
                                clear_vdqcr(p, fq);
                } else {
                        /* SDQCR: context_b points to the FQ */
                        fq = tag_to_fq(be32_to_cpu(dq->context_b));
                        /* Now let the callback do its stuff */
                        res = fq->cb.dqrr(p, fq, dq);
                        /*
                         * The callback can request that we exit without
                         * consuming this entry nor advancing;
                         */
                        if (res == qman_cb_dqrr_stop)
                                break;
                }
                /* Interpret 'dq' from a driver perspective. */
                /*
                 * Parking isn't possible unless HELDACTIVE was set. NB,
                 * FORCEELIGIBLE implies HELDACTIVE, so we only need to
                 * check for HELDACTIVE to cover both.
                 */
                DPAA_ASSERT((dq->stat & QM_DQRR_STAT_FQ_HELDACTIVE) ||
                            (res != qman_cb_dqrr_park));
                /* just means "skip it, I'll consume it myself later on" */
                if (res != qman_cb_dqrr_defer)
                        qm_dqrr_cdc_consume_1ptr(&p->p, dq,
                                                 res == qman_cb_dqrr_park);
                /* Move forward */
                qm_dqrr_next(&p->p);
                /*
                 * Entry processed and consumed, increment our counter.  The
                 * callback can request that we exit after consuming the
                 * entry, and we also exit if we reach our processing limit,
                 * so loop back only if neither of these conditions is met.
                 */
        } while (++limit < poll_limit && res != qman_cb_dqrr_consume_stop);

        return limit;
}

void qman_p_irqsource_add(struct qman_portal *p, u32 bits)
{
        unsigned long irqflags;

        local_irq_save(irqflags);
        p->irq_sources |= bits & QM_PIRQ_VISIBLE;
        qm_out(&p->p, QM_REG_IER, p->irq_sources);
        local_irq_restore(irqflags);
}
EXPORT_SYMBOL(qman_p_irqsource_add);

void qman_p_irqsource_remove(struct qman_portal *p, u32 bits)
{
        unsigned long irqflags;
        u32 ier;

        /*
         * Our interrupt handler only processes+clears status register bits that
         * are in p->irq_sources. As we're trimming that mask, if one of them
         * were to assert in the status register just before we remove it from
         * the enable register, there would be an interrupt-storm when we
         * release the IRQ lock. So we wait for the enable register update to
         * take effect in h/w (by reading it back) and then clear all other bits
         * in the status register. Ie. we clear them from ISR once it's certain
         * IER won't allow them to reassert.
         */
        local_irq_save(irqflags);
        bits &= QM_PIRQ_VISIBLE;
        p->irq_sources &= ~bits;
        qm_out(&p->p, QM_REG_IER, p->irq_sources);
        ier = qm_in(&p->p, QM_REG_IER);
        /*
         * Using "~ier" (rather than "bits" or "~p->irq_sources") creates a
         * data-dependency, ie. to protect against re-ordering.
         */
        qm_out(&p->p, QM_REG_ISR, ~ier);
        local_irq_restore(irqflags);
}
EXPORT_SYMBOL(qman_p_irqsource_remove);

const cpumask_t *qman_affine_cpus(void)
{
        return &affine_mask;
}
EXPORT_SYMBOL(qman_affine_cpus);

u16 qman_affine_channel(int cpu)
{
        if (cpu < 0) {
                struct qman_portal *portal = get_affine_portal();

                cpu = portal->config->cpu;
                put_affine_portal();
        }
        WARN_ON(!cpumask_test_cpu(cpu, &affine_mask));
        return affine_channels[cpu];
}
EXPORT_SYMBOL(qman_affine_channel);

struct qman_portal *qman_get_affine_portal(int cpu)
{
        return affine_portals[cpu];
}
EXPORT_SYMBOL(qman_get_affine_portal);

int qman_p_poll_dqrr(struct qman_portal *p, unsigned int limit)
{
        return __poll_portal_fast(p, limit);
}
EXPORT_SYMBOL(qman_p_poll_dqrr);

void qman_p_static_dequeue_add(struct qman_portal *p, u32 pools)
{
        unsigned long irqflags;

        local_irq_save(irqflags);
        pools &= p->config->pools;
        p->sdqcr |= pools;
        qm_dqrr_sdqcr_set(&p->p, p->sdqcr);
        local_irq_restore(irqflags);
}
EXPORT_SYMBOL(qman_p_static_dequeue_add);

/* Frame queue API */

static const char *mcr_result_str(u8 result)
{
        switch (result) {
        case QM_MCR_RESULT_NULL:
                return "QM_MCR_RESULT_NULL";
        case QM_MCR_RESULT_OK:
                return "QM_MCR_RESULT_OK";
        case QM_MCR_RESULT_ERR_FQID:
                return "QM_MCR_RESULT_ERR_FQID";
        case QM_MCR_RESULT_ERR_FQSTATE:
                return "QM_MCR_RESULT_ERR_FQSTATE";
        case QM_MCR_RESULT_ERR_NOTEMPTY:
                return "QM_MCR_RESULT_ERR_NOTEMPTY";
        case QM_MCR_RESULT_PENDING:
                return "QM_MCR_RESULT_PENDING";
        case QM_MCR_RESULT_ERR_BADCOMMAND:
                return "QM_MCR_RESULT_ERR_BADCOMMAND";
        }
        return "<unknown MCR result>";
}

int qman_create_fq(u32 fqid, u32 flags, struct qman_fq *fq)
{
        if (flags & QMAN_FQ_FLAG_DYNAMIC_FQID) {
                int ret = qman_alloc_fqid(&fqid);

                if (ret)
                        return ret;
        }
        fq->fqid = fqid;
        fq->flags = flags;
        fq->state = qman_fq_state_oos;
        fq->cgr_groupid = 0;

        /* A context_b of 0 is allegedly special, so don't use that fqid */
        if (fqid == 0 || fqid >= num_fqids) {
                WARN(1, "bad fqid %d\n", fqid);
                return -EINVAL;
        }

        fq->idx = fqid * 2;
        if (flags & QMAN_FQ_FLAG_NO_MODIFY)
                fq->idx++;

        WARN_ON(fq_table[fq->idx]);
        fq_table[fq->idx] = fq;

        return 0;
}
EXPORT_SYMBOL(qman_create_fq);

void qman_destroy_fq(struct qman_fq *fq)
{
        /*
         * We don't need to lock the FQ as it is a pre-condition that the FQ be
         * quiesced. Instead, run some checks.
         */
        switch (fq->state) {
        case qman_fq_state_parked:
        case qman_fq_state_oos:
                if (fq_isset(fq, QMAN_FQ_FLAG_DYNAMIC_FQID))
                        qman_release_fqid(fq->fqid);

                DPAA_ASSERT(fq_table[fq->idx]);
                fq_table[fq->idx] = NULL;
                return;
        default:
                break;
        }
        DPAA_ASSERT(NULL == "qman_free_fq() on unquiesced FQ!");
}
EXPORT_SYMBOL(qman_destroy_fq);

u32 qman_fq_fqid(struct qman_fq *fq)
{
        return fq->fqid;
}
EXPORT_SYMBOL(qman_fq_fqid);

int qman_init_fq(struct qman_fq *fq, u32 flags, struct qm_mcc_initfq *opts)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p;
        u8 res, myverb;
        int ret = 0;

        myverb = (flags & QMAN_INITFQ_FLAG_SCHED)
                ? QM_MCC_VERB_INITFQ_SCHED : QM_MCC_VERB_INITFQ_PARKED;

        if (fq->state != qman_fq_state_oos &&
            fq->state != qman_fq_state_parked)
                return -EINVAL;
#ifdef CONFIG_FSL_DPAA_CHECKING
        if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
                return -EINVAL;
#endif
        if (opts && (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_OAC)) {
                /* And can't be set at the same time as TDTHRESH */
                if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_TDTHRESH)
                        return -EINVAL;
        }
        /* Issue an INITFQ_[PARKED|SCHED] management command */
        p = get_affine_portal();
        if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
            (fq->state != qman_fq_state_oos &&
             fq->state != qman_fq_state_parked)) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        if (opts)
                mcc->initfq = *opts;
        qm_fqid_set(&mcc->fq, fq->fqid);
        mcc->initfq.count = 0;
        /*
         * If the FQ does *not* have the TO_DCPORTAL flag, context_b is set as a
         * demux pointer. Otherwise, the caller-provided value is allowed to
         * stand, don't overwrite it.
         */
        if (fq_isclear(fq, QMAN_FQ_FLAG_TO_DCPORTAL)) {
                dma_addr_t phys_fq;

                mcc->initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CONTEXTB);
                mcc->initfq.fqd.context_b = cpu_to_be32(fq_to_tag(fq));
                /*
                 *  and the physical address - NB, if the user wasn't trying to
                 * set CONTEXTA, clear the stashing settings.
                 */
                if (!(be16_to_cpu(mcc->initfq.we_mask) &
                                  QM_INITFQ_WE_CONTEXTA)) {
                        mcc->initfq.we_mask |=
                                cpu_to_be16(QM_INITFQ_WE_CONTEXTA);
                        memset(&mcc->initfq.fqd.context_a, 0,
                                sizeof(mcc->initfq.fqd.context_a));
                } else {
                        struct qman_portal *p = qman_dma_portal;

                        phys_fq = dma_map_single(p->config->dev, fq,
                                                 sizeof(*fq), DMA_TO_DEVICE);
                        if (dma_mapping_error(p->config->dev, phys_fq)) {
                                dev_err(p->config->dev, "dma_mapping failed\n");
                                ret = -EIO;
                                goto out;
                        }

                        qm_fqd_stashing_set64(&mcc->initfq.fqd, phys_fq);
                }
        }
        if (flags & QMAN_INITFQ_FLAG_LOCAL) {
                int wq = 0;

                if (!(be16_to_cpu(mcc->initfq.we_mask) &
                                  QM_INITFQ_WE_DESTWQ)) {
                        mcc->initfq.we_mask |=
                                cpu_to_be16(QM_INITFQ_WE_DESTWQ);
                        wq = 4;
                }
                qm_fqd_set_destwq(&mcc->initfq.fqd, p->config->channel, wq);
        }
        qm_mc_commit(&p->p, myverb);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                dev_err(p->config->dev, "MCR timeout\n");
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);
        res = mcr->result;
        if (res != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
        if (opts) {
                if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_FQCTRL) {
                        if (be16_to_cpu(opts->fqd.fq_ctrl) & QM_FQCTRL_CGE)
                                fq_set(fq, QMAN_FQ_STATE_CGR_EN);
                        else
                                fq_clear(fq, QMAN_FQ_STATE_CGR_EN);
                }
                if (be16_to_cpu(opts->we_mask) & QM_INITFQ_WE_CGID)
                        fq->cgr_groupid = opts->fqd.cgid;
        }
        fq->state = (flags & QMAN_INITFQ_FLAG_SCHED) ?
                qman_fq_state_sched : qman_fq_state_parked;

out:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_init_fq);

int qman_schedule_fq(struct qman_fq *fq)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p;
        int ret = 0;

        if (fq->state != qman_fq_state_parked)
                return -EINVAL;
#ifdef CONFIG_FSL_DPAA_CHECKING
        if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
                return -EINVAL;
#endif
        /* Issue a ALTERFQ_SCHED management command */
        p = get_affine_portal();
        if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
            fq->state != qman_fq_state_parked) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_SCHED);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                dev_err(p->config->dev, "ALTER_SCHED timeout\n");
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_SCHED);
        if (mcr->result != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
        fq->state = qman_fq_state_sched;
out:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_schedule_fq);

int qman_retire_fq(struct qman_fq *fq, u32 *flags)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p;
        int ret;
        u8 res;

        if (fq->state != qman_fq_state_parked &&
            fq->state != qman_fq_state_sched)
                return -EINVAL;
#ifdef CONFIG_FSL_DPAA_CHECKING
        if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
                return -EINVAL;
#endif
        p = get_affine_portal();
        if (fq_isset(fq, QMAN_FQ_STATE_CHANGING) ||
            fq->state == qman_fq_state_retired ||
            fq->state == qman_fq_state_oos) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_RETIRE);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                dev_crit(p->config->dev, "ALTER_RETIRE timeout\n");
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_RETIRE);
        res = mcr->result;
        /*
         * "Elegant" would be to treat OK/PENDING the same way; set CHANGING,
         * and defer the flags until FQRNI or FQRN (respectively) show up. But
         * "Friendly" is to process OK immediately, and not set CHANGING. We do
         * friendly, otherwise the caller doesn't necessarily have a fully
         * "retired" FQ on return even if the retirement was immediate. However
         * this does mean some code duplication between here and
         * fq_state_change().
         */
        if (res == QM_MCR_RESULT_OK) {
                ret = 0;
                /* Process 'fq' right away, we'll ignore FQRNI */
                if (mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY)
                        fq_set(fq, QMAN_FQ_STATE_NE);
                if (mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)
                        fq_set(fq, QMAN_FQ_STATE_ORL);
                if (flags)
                        *flags = fq->flags;
                fq->state = qman_fq_state_retired;
                if (fq->cb.fqs) {
                        /*
                         * Another issue with supporting "immediate" retirement
                         * is that we're forced to drop FQRNIs, because by the
                         * time they're seen it may already be "too late" (the
                         * fq may have been OOS'd and free()'d already). But if
                         * the upper layer wants a callback whether it's
                         * immediate or not, we have to fake a "MR" entry to
                         * look like an FQRNI...
                         */
                        union qm_mr_entry msg;

                        msg.verb = QM_MR_VERB_FQRNI;
                        msg.fq.fqs = mcr->alterfq.fqs;
                        qm_fqid_set(&msg.fq, fq->fqid);
                        msg.fq.context_b = cpu_to_be32(fq_to_tag(fq));
                        fq->cb.fqs(p, fq, &msg);
                }
        } else if (res == QM_MCR_RESULT_PENDING) {
                ret = 1;
                fq_set(fq, QMAN_FQ_STATE_CHANGING);
        } else {
                ret = -EIO;
        }
out:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_retire_fq);

int qman_oos_fq(struct qman_fq *fq)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p;
        int ret = 0;

        if (fq->state != qman_fq_state_retired)
                return -EINVAL;
#ifdef CONFIG_FSL_DPAA_CHECKING
        if (fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY))
                return -EINVAL;
#endif
        p = get_affine_portal();
        if (fq_isset(fq, QMAN_FQ_STATE_BLOCKOOS) ||
            fq->state != qman_fq_state_retired) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                ret = -ETIMEDOUT;
                goto out;
        }
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_OOS);
        if (mcr->result != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
        fq->state = qman_fq_state_oos;
out:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_oos_fq);

int qman_query_fq(struct qman_fq *fq, struct qm_fqd *fqd)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        int ret = 0;

        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
        if (mcr->result == QM_MCR_RESULT_OK)
                *fqd = mcr->queryfq.fqd;
        else
                ret = -EIO;
out:
        put_affine_portal();
        return ret;
}

int qman_query_fq_np(struct qman_fq *fq, struct qm_mcr_queryfq_np *np)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        int ret = 0;

        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
        if (mcr->result == QM_MCR_RESULT_OK)
                *np = mcr->queryfq_np;
        else if (mcr->result == QM_MCR_RESULT_ERR_FQID)
                ret = -ERANGE;
        else
                ret = -EIO;
out:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_query_fq_np);

static int qman_query_cgr(struct qman_cgr *cgr,
                          struct qm_mcr_querycgr *cgrd)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        int ret = 0;

        mcc = qm_mc_start(&p->p);
        mcc->cgr.cgid = cgr->cgrid;
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCGR);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                ret = -ETIMEDOUT;
                goto out;
        }
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYCGR);
        if (mcr->result == QM_MCR_RESULT_OK)
                *cgrd = mcr->querycgr;
        else {
                dev_err(p->config->dev, "QUERY_CGR failed: %s\n",
                        mcr_result_str(mcr->result));
                ret = -EIO;
        }
out:
        put_affine_portal();
        return ret;
}

int qman_query_cgr_congested(struct qman_cgr *cgr, bool *result)
{
        struct qm_mcr_querycgr query_cgr;
        int err;

        err = qman_query_cgr(cgr, &query_cgr);
        if (err)
                return err;

        *result = !!query_cgr.cgr.cs;
        return 0;
}
EXPORT_SYMBOL(qman_query_cgr_congested);

/* internal function used as a wait_event() expression */
static int set_p_vdqcr(struct qman_portal *p, struct qman_fq *fq, u32 vdqcr)
{
        unsigned long irqflags;
        int ret = -EBUSY;

        local_irq_save(irqflags);
        if (p->vdqcr_owned)
                goto out;
        if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
                goto out;

        fq_set(fq, QMAN_FQ_STATE_VDQCR);
        p->vdqcr_owned = fq;
        qm_dqrr_vdqcr_set(&p->p, vdqcr);
        ret = 0;
out:
        local_irq_restore(irqflags);
        return ret;
}

static int set_vdqcr(struct qman_portal **p, struct qman_fq *fq, u32 vdqcr)
{
        int ret;

        *p = get_affine_portal();
        ret = set_p_vdqcr(*p, fq, vdqcr);
        put_affine_portal();
        return ret;
}

static int wait_vdqcr_start(struct qman_portal **p, struct qman_fq *fq,
                                u32 vdqcr, u32 flags)
{
        int ret = 0;

        if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
                ret = wait_event_interruptible(affine_queue,
                                !set_vdqcr(p, fq, vdqcr));
        else
                wait_event(affine_queue, !set_vdqcr(p, fq, vdqcr));
        return ret;
}

int qman_volatile_dequeue(struct qman_fq *fq, u32 flags, u32 vdqcr)
{
        struct qman_portal *p;
        int ret;

        if (fq->state != qman_fq_state_parked &&
            fq->state != qman_fq_state_retired)
                return -EINVAL;
        if (vdqcr & QM_VDQCR_FQID_MASK)
                return -EINVAL;
        if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
                return -EBUSY;
        vdqcr = (vdqcr & ~QM_VDQCR_FQID_MASK) | fq->fqid;
        if (flags & QMAN_VOLATILE_FLAG_WAIT)
                ret = wait_vdqcr_start(&p, fq, vdqcr, flags);
        else
                ret = set_vdqcr(&p, fq, vdqcr);
        if (ret)
                return ret;
        /* VDQCR is set */
        if (flags & QMAN_VOLATILE_FLAG_FINISH) {
                if (flags & QMAN_VOLATILE_FLAG_WAIT_INT)
                        /*
                         * NB: don't propagate any error - the caller wouldn't
                         * know whether the VDQCR was issued or not. A signal
                         * could arrive after returning anyway, so the caller
                         * can check signal_pending() if that's an issue.
                         */
                        wait_event_interruptible(affine_queue,
                                !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
                else
                        wait_event(affine_queue,
                                !fq_isset(fq, QMAN_FQ_STATE_VDQCR));
        }
        return 0;
}
EXPORT_SYMBOL(qman_volatile_dequeue);

static void update_eqcr_ci(struct qman_portal *p, u8 avail)
{
        if (avail)
                qm_eqcr_cce_prefetch(&p->p);
        else
                qm_eqcr_cce_update(&p->p);
}

int qman_enqueue(struct qman_fq *fq, const struct qm_fd *fd)
{
        struct qman_portal *p;
        struct qm_eqcr_entry *eq;
        unsigned long irqflags;
        u8 avail;

        p = get_affine_portal();
        local_irq_save(irqflags);

        if (p->use_eqcr_ci_stashing) {
                /*
                 * The stashing case is easy, only update if we need to in
                 * order to try and liberate ring entries.
                 */
                eq = qm_eqcr_start_stash(&p->p);
        } else {
                /*
                 * The non-stashing case is harder, need to prefetch ahead of
                 * time.
                 */
                avail = qm_eqcr_get_avail(&p->p);
                if (avail < 2)
                        update_eqcr_ci(p, avail);
                eq = qm_eqcr_start_no_stash(&p->p);
        }

        if (unlikely(!eq))
                goto out;

        qm_fqid_set(eq, fq->fqid);
        eq->tag = cpu_to_be32(fq_to_tag(fq));
        eq->fd = *fd;

        qm_eqcr_pvb_commit(&p->p, QM_EQCR_VERB_CMD_ENQUEUE);
out:
        local_irq_restore(irqflags);
        put_affine_portal();
        return 0;
}
EXPORT_SYMBOL(qman_enqueue);

static int qm_modify_cgr(struct qman_cgr *cgr, u32 flags,
                         struct qm_mcc_initcgr *opts)
{
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        u8 verb = QM_MCC_VERB_MODIFYCGR;
        int ret = 0;

        mcc = qm_mc_start(&p->p);
        if (opts)
                mcc->initcgr = *opts;
        mcc->initcgr.cgid = cgr->cgrid;
        if (flags & QMAN_CGR_FLAG_USE_INIT)
                verb = QM_MCC_VERB_INITCGR;
        qm_mc_commit(&p->p, verb);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == verb);
        if (mcr->result != QM_MCR_RESULT_OK)
                ret = -EIO;

out:
        put_affine_portal();
        return ret;
}

#define PORTAL_IDX(n)   (n->config->channel - QM_CHANNEL_SWPORTAL0)

/* congestion state change notification target update control */
static void qm_cgr_cscn_targ_set(struct __qm_mc_cgr *cgr, int pi, u32 val)
{
        if (qman_ip_rev >= QMAN_REV30)
                cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi |
                                        QM_CGR_TARG_UDP_CTRL_WRITE_BIT);
        else
                cgr->cscn_targ = cpu_to_be32(val | QM_CGR_TARG_PORTAL(pi));
}

static void qm_cgr_cscn_targ_clear(struct __qm_mc_cgr *cgr, int pi, u32 val)
{
        if (qman_ip_rev >= QMAN_REV30)
                cgr->cscn_targ_upd_ctrl = cpu_to_be16(pi);
        else
                cgr->cscn_targ = cpu_to_be32(val & ~QM_CGR_TARG_PORTAL(pi));
}

static u8 qman_cgr_cpus[CGR_NUM];

void qman_init_cgr_all(void)
{
        struct qman_cgr cgr;
        int err_cnt = 0;

        for (cgr.cgrid = 0; cgr.cgrid < CGR_NUM; cgr.cgrid++) {
                if (qm_modify_cgr(&cgr, QMAN_CGR_FLAG_USE_INIT, NULL))
                        err_cnt++;
        }

        if (err_cnt)
                pr_err("Warning: %d error%s while initialising CGR h/w\n",
                       err_cnt, (err_cnt > 1) ? "s" : "");
}

int qman_create_cgr(struct qman_cgr *cgr, u32 flags,
                    struct qm_mcc_initcgr *opts)
{
        struct qm_mcr_querycgr cgr_state;
        int ret;
        struct qman_portal *p;

        /*
         * We have to check that the provided CGRID is within the limits of the
         * data-structures, for obvious reasons. However we'll let h/w take
         * care of determining whether it's within the limits of what exists on
         * the SoC.
         */
        if (cgr->cgrid >= CGR_NUM)
                return -EINVAL;

        preempt_disable();
        p = get_affine_portal();
        qman_cgr_cpus[cgr->cgrid] = smp_processor_id();
        preempt_enable();

        cgr->chan = p->config->channel;
        spin_lock(&p->cgr_lock);

        if (opts) {
                struct qm_mcc_initcgr local_opts = *opts;

                ret = qman_query_cgr(cgr, &cgr_state);
                if (ret)
                        goto out;

                qm_cgr_cscn_targ_set(&local_opts.cgr, PORTAL_IDX(p),
                                     be32_to_cpu(cgr_state.cgr.cscn_targ));
                local_opts.we_mask |= cpu_to_be16(QM_CGR_WE_CSCN_TARG);

                /* send init if flags indicate so */
                if (flags & QMAN_CGR_FLAG_USE_INIT)
                        ret = qm_modify_cgr(cgr, QMAN_CGR_FLAG_USE_INIT,
                                            &local_opts);
                else
                        ret = qm_modify_cgr(cgr, 0, &local_opts);
                if (ret)
                        goto out;
        }

        list_add(&cgr->node, &p->cgr_cbs);

        /* Determine if newly added object requires its callback to be called */
        ret = qman_query_cgr(cgr, &cgr_state);
        if (ret) {
                /* we can't go back, so proceed and return success */
                dev_err(p->config->dev, "CGR HW state partially modified\n");
                ret = 0;
                goto out;
        }
        if (cgr->cb && cgr_state.cgr.cscn_en &&
            qman_cgrs_get(&p->cgrs[1], cgr->cgrid))
                cgr->cb(p, cgr, 1);
out:
        spin_unlock(&p->cgr_lock);
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_create_cgr);

int qman_delete_cgr(struct qman_cgr *cgr)
{
        unsigned long irqflags;
        struct qm_mcr_querycgr cgr_state;
        struct qm_mcc_initcgr local_opts;
        int ret = 0;
        struct qman_cgr *i;
        struct qman_portal *p = get_affine_portal();

        if (cgr->chan != p->config->channel) {
                /* attempt to delete from other portal than creator */
                dev_err(p->config->dev, "CGR not owned by current portal");
                dev_dbg(p->config->dev, " create 0x%x, delete 0x%x\n",
                        cgr->chan, p->config->channel);

                ret = -EINVAL;
                goto put_portal;
        }
        memset(&local_opts, 0, sizeof(struct qm_mcc_initcgr));
        spin_lock_irqsave(&p->cgr_lock, irqflags);
        list_del(&cgr->node);
        /*
         * If there are no other CGR objects for this CGRID in the list,
         * update CSCN_TARG accordingly
         */
        list_for_each_entry(i, &p->cgr_cbs, node)
                if (i->cgrid == cgr->cgrid && i->cb)
                        goto release_lock;
        ret = qman_query_cgr(cgr, &cgr_state);
        if (ret)  {
                /* add back to the list */
                list_add(&cgr->node, &p->cgr_cbs);
                goto release_lock;
        }

        local_opts.we_mask = cpu_to_be16(QM_CGR_WE_CSCN_TARG);
        qm_cgr_cscn_targ_clear(&local_opts.cgr, PORTAL_IDX(p),
                               be32_to_cpu(cgr_state.cgr.cscn_targ));

        ret = qm_modify_cgr(cgr, 0, &local_opts);
        if (ret)
                /* add back to the list */
                list_add(&cgr->node, &p->cgr_cbs);
release_lock:
        spin_unlock_irqrestore(&p->cgr_lock, irqflags);
put_portal:
        put_affine_portal();
        return ret;
}
EXPORT_SYMBOL(qman_delete_cgr);

struct cgr_comp {
        struct qman_cgr *cgr;
        struct completion completion;
};

static int qman_delete_cgr_thread(void *p)
{
        struct cgr_comp *cgr_comp = (struct cgr_comp *)p;
        int ret;

        ret = qman_delete_cgr(cgr_comp->cgr);
        complete(&cgr_comp->completion);

        return ret;
}

void qman_delete_cgr_safe(struct qman_cgr *cgr)
{
        struct task_struct *thread;
        struct cgr_comp cgr_comp;

        preempt_disable();
        if (qman_cgr_cpus[cgr->cgrid] != smp_processor_id()) {
                init_completion(&cgr_comp.completion);
                cgr_comp.cgr = cgr;
                thread = kthread_create(qman_delete_cgr_thread, &cgr_comp,
                                        "cgr_del");

                if (IS_ERR(thread))
                        goto out;

                kthread_bind(thread, qman_cgr_cpus[cgr->cgrid]);
                wake_up_process(thread);
                wait_for_completion(&cgr_comp.completion);
                preempt_enable();
                return;
        }
out:
        qman_delete_cgr(cgr);
        preempt_enable();
}
EXPORT_SYMBOL(qman_delete_cgr_safe);

/* Cleanup FQs */

static int _qm_mr_consume_and_match_verb(struct qm_portal *p, int v)
{
        const union qm_mr_entry *msg;
        int found = 0;

        qm_mr_pvb_update(p);
        msg = qm_mr_current(p);
        while (msg) {
                if ((msg->verb & QM_MR_VERB_TYPE_MASK) == v)
                        found = 1;
                qm_mr_next(p);
                qm_mr_cci_consume_to_current(p);
                qm_mr_pvb_update(p);
                msg = qm_mr_current(p);
        }
        return found;
}

static int _qm_dqrr_consume_and_match(struct qm_portal *p, u32 fqid, int s,
                                      bool wait)
{
        const struct qm_dqrr_entry *dqrr;
        int found = 0;

        do {
                qm_dqrr_pvb_update(p);
                dqrr = qm_dqrr_current(p);
                if (!dqrr)
                        cpu_relax();
        } while (wait && !dqrr);

        while (dqrr) {
                if (qm_fqid_get(dqrr) == fqid && (dqrr->stat & s))
                        found = 1;
                qm_dqrr_cdc_consume_1ptr(p, dqrr, 0);
                qm_dqrr_pvb_update(p);
                qm_dqrr_next(p);
                dqrr = qm_dqrr_current(p);
        }
        return found;
}

#define qm_mr_drain(p, V) \
        _qm_mr_consume_and_match_verb(p, QM_MR_VERB_##V)

#define qm_dqrr_drain(p, f, S) \
        _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, false)

#define qm_dqrr_drain_wait(p, f, S) \
        _qm_dqrr_consume_and_match(p, f, QM_DQRR_STAT_##S, true)

#define qm_dqrr_drain_nomatch(p) \
        _qm_dqrr_consume_and_match(p, 0, 0, false)

static int qman_shutdown_fq(u32 fqid)
{
        struct qman_portal *p;
        struct device *dev;
        union qm_mc_command *mcc;
        union qm_mc_result *mcr;
        int orl_empty, drain = 0, ret = 0;
        u32 channel, wq, res;
        u8 state;

        p = get_affine_portal();
        dev = p->config->dev;
        /* Determine the state of the FQID */
        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                dev_err(dev, "QUERYFQ_NP timeout\n");
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
        state = mcr->queryfq_np.state & QM_MCR_NP_STATE_MASK;
        if (state == QM_MCR_NP_STATE_OOS)
                goto out; /* Already OOS, no need to do anymore checks */

        /* Query which channel the FQ is using */
        mcc = qm_mc_start(&p->p);
        qm_fqid_set(&mcc->fq, fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
        if (!qm_mc_result_timeout(&p->p, &mcr)) {
                dev_err(dev, "QUERYFQ timeout\n");
                ret = -ETIMEDOUT;
                goto out;
        }

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
        /* Need to store these since the MCR gets reused */
        channel = qm_fqd_get_chan(&mcr->queryfq.fqd);
        wq = qm_fqd_get_wq(&mcr->queryfq.fqd);

        switch (state) {
        case QM_MCR_NP_STATE_TEN_SCHED:
        case QM_MCR_NP_STATE_TRU_SCHED:
        case QM_MCR_NP_STATE_ACTIVE:
        case QM_MCR_NP_STATE_PARKED:
                orl_empty = 0;
                mcc = qm_mc_start(&p->p);
                qm_fqid_set(&mcc->fq, fqid);
                qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_RETIRE);
                if (!qm_mc_result_timeout(&p->p, &mcr)) {
                        dev_err(dev, "QUERYFQ_NP timeout\n");
                        ret = -ETIMEDOUT;
                        goto out;
                }
                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                            QM_MCR_VERB_ALTER_RETIRE);
                res = mcr->result; /* Make a copy as we reuse MCR below */

                if (res == QM_MCR_RESULT_PENDING) {
                        /*
                         * Need to wait for the FQRN in the message ring, which
                         * will only occur once the FQ has been drained.  In
                         * order for the FQ to drain the portal needs to be set
                         * to dequeue from the channel the FQ is scheduled on
                         */
                        int found_fqrn = 0;
                        u16 dequeue_wq = 0;

                        /* Flag that we need to drain FQ */
                        drain = 1;

                        if (channel >= qm_channel_pool1 &&
                            channel < qm_channel_pool1 + 15) {
                                /* Pool channel, enable the bit in the portal */
                                dequeue_wq = (channel -
                                              qm_channel_pool1 + 1)<<4 | wq;
                        } else if (channel < qm_channel_pool1) {
                                /* Dedicated channel */
                                dequeue_wq = wq;
                        } else {
                                dev_err(dev, "Can't recover FQ 0x%x, ch: 0x%x",
                                        fqid, channel);
                                ret = -EBUSY;
                                goto out;
                        }
                        /* Set the sdqcr to drain this channel */
                        if (channel < qm_channel_pool1)
                                qm_dqrr_sdqcr_set(&p->p,
                                                  QM_SDQCR_TYPE_ACTIVE |
                                                  QM_SDQCR_CHANNELS_DEDICATED);
                        else
                                qm_dqrr_sdqcr_set(&p->p,
                                                  QM_SDQCR_TYPE_ACTIVE |
                                                  QM_SDQCR_CHANNELS_POOL_CONV
                                                  (channel));
                        do {
                                /* Keep draining DQRR while checking the MR*/
                                qm_dqrr_drain_nomatch(&p->p);
                                /* Process message ring too */
                                found_fqrn = qm_mr_drain(&p->p, FQRN);
                                cpu_relax();
                        } while (!found_fqrn);

                }
                if (res != QM_MCR_RESULT_OK &&
                    res != QM_MCR_RESULT_PENDING) {
                        dev_err(dev, "retire_fq failed: FQ 0x%x, res=0x%x\n",
                                fqid, res);
                        ret = -EIO;
                        goto out;
                }
                if (!(mcr->alterfq.fqs & QM_MCR_FQS_ORLPRESENT)) {
                        /*
                         * ORL had no entries, no need to wait until the
                         * ERNs come in
                         */
                        orl_empty = 1;
                }
                /*
                 * Retirement succeeded, check to see if FQ needs
                 * to be drained
                 */
                if (drain || mcr->alterfq.fqs & QM_MCR_FQS_NOTEMPTY) {
                        /* FQ is Not Empty, drain using volatile DQ commands */
                        do {
                                u32 vdqcr = fqid | QM_VDQCR_NUMFRAMES_SET(3);

                                qm_dqrr_vdqcr_set(&p->p, vdqcr);
                                /*
                                 * Wait for a dequeue and process the dequeues,
                                 * making sure to empty the ring completely
                                 */
                        } while (qm_dqrr_drain_wait(&p->p, fqid, FQ_EMPTY));
                }
                qm_dqrr_sdqcr_set(&p->p, 0);

                while (!orl_empty) {
                        /* Wait for the ORL to have been completely drained */
                        orl_empty = qm_mr_drain(&p->p, FQRL);
                        cpu_relax();
                }
                mcc = qm_mc_start(&p->p);
                qm_fqid_set(&mcc->fq, fqid);
                qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
                if (!qm_mc_result_timeout(&p->p, &mcr)) {
                        ret = -ETIMEDOUT;
                        goto out;
                }

                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                            QM_MCR_VERB_ALTER_OOS);
                if (mcr->result != QM_MCR_RESULT_OK) {
                        dev_err(dev, "OOS after drain fail: FQ 0x%x (0x%x)\n",
                                fqid, mcr->result);
                        ret = -EIO;
                        goto out;
                }
                break;

        case QM_MCR_NP_STATE_RETIRED:
                /* Send OOS Command */
                mcc = qm_mc_start(&p->p);
                qm_fqid_set(&mcc->fq, fqid);
                qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
                if (!qm_mc_result_timeout(&p->p, &mcr)) {
                        ret = -ETIMEDOUT;
                        goto out;
                }

                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                            QM_MCR_VERB_ALTER_OOS);
                if (mcr->result) {
                        dev_err(dev, "OOS fail: FQ 0x%x (0x%x)\n",
                                fqid, mcr->result);
                        ret = -EIO;
                        goto out;
                }
                break;

        case QM_MCR_NP_STATE_OOS:
                /*  Done */
                break;

        default:
                ret = -EIO;
        }

out:
        put_affine_portal();
        return ret;
}

const struct qm_portal_config *qman_get_qm_portal_config(
                                                struct qman_portal *portal)
{
        return portal->config;
}
EXPORT_SYMBOL(qman_get_qm_portal_config);

struct gen_pool *qm_fqalloc; /* FQID allocator */
struct gen_pool *qm_qpalloc; /* pool-channel allocator */
struct gen_pool *qm_cgralloc; /* CGR ID allocator */

static int qman_alloc_range(struct gen_pool *p, u32 *result, u32 cnt)
{
        unsigned long addr;

        addr = gen_pool_alloc(p, cnt);
        if (!addr)
                return -ENOMEM;

        *result = addr & ~DPAA_GENALLOC_OFF;

        return 0;
}

int qman_alloc_fqid_range(u32 *result, u32 count)
{
        return qman_alloc_range(qm_fqalloc, result, count);
}
EXPORT_SYMBOL(qman_alloc_fqid_range);

int qman_alloc_pool_range(u32 *result, u32 count)
{
        return qman_alloc_range(qm_qpalloc, result, count);
}
EXPORT_SYMBOL(qman_alloc_pool_range);

int qman_alloc_cgrid_range(u32 *result, u32 count)
{
        return qman_alloc_range(qm_cgralloc, result, count);
}
EXPORT_SYMBOL(qman_alloc_cgrid_range);

int qman_release_fqid(u32 fqid)
{
        int ret = qman_shutdown_fq(fqid);

        if (ret) {
                pr_debug("FQID %d leaked\n", fqid);
                return ret;
        }

        gen_pool_free(qm_fqalloc, fqid | DPAA_GENALLOC_OFF, 1);
        return 0;
}
EXPORT_SYMBOL(qman_release_fqid);

static int qpool_cleanup(u32 qp)
{
        /*
         * We query all FQDs starting from
         * FQID 1 until we get an "invalid FQID" error, looking for non-OOS FQDs
         * whose destination channel is the pool-channel being released.
         * When a non-OOS FQD is found we attempt to clean it up
         */
        struct qman_fq fq = {
                .fqid = QM_FQID_RANGE_START
        };
        int err;

        do {
                struct qm_mcr_queryfq_np np;

                err = qman_query_fq_np(&fq, &np);
                if (err == -ERANGE)
                        /* FQID range exceeded, found no problems */
                        return 0;
                else if (WARN_ON(err))
                        return err;

                if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
                        struct qm_fqd fqd;

                        err = qman_query_fq(&fq, &fqd);
                        if (WARN_ON(err))
                                return err;
                        if (qm_fqd_get_chan(&fqd) == qp) {
                                /* The channel is the FQ's target, clean it */
                                err = qman_shutdown_fq(fq.fqid);
                                if (err)
                                        /*
                                         * Couldn't shut down the FQ
                                         * so the pool must be leaked
                                         */
                                        return err;
                        }
                }
                /* Move to the next FQID */
                fq.fqid++;
        } while (1);
}

int qman_release_pool(u32 qp)
{
        int ret;

        ret = qpool_cleanup(qp);
        if (ret) {
                pr_debug("CHID %d leaked\n", qp);
                return ret;
        }

        gen_pool_free(qm_qpalloc, qp | DPAA_GENALLOC_OFF, 1);
        return 0;
}
EXPORT_SYMBOL(qman_release_pool);

static int cgr_cleanup(u32 cgrid)
{
        /*
         * query all FQDs starting from FQID 1 until we get an "invalid FQID"
         * error, looking for non-OOS FQDs whose CGR is the CGR being released
         */
        struct qman_fq fq = {
                .fqid = QM_FQID_RANGE_START
        };
        int err;

        do {
                struct qm_mcr_queryfq_np np;

                err = qman_query_fq_np(&fq, &np);
                if (err == -ERANGE)
                        /* FQID range exceeded, found no problems */
                        return 0;
                else if (WARN_ON(err))
                        return err;

                if ((np.state & QM_MCR_NP_STATE_MASK) != QM_MCR_NP_STATE_OOS) {
                        struct qm_fqd fqd;

                        err = qman_query_fq(&fq, &fqd);
                        if (WARN_ON(err))
                                return err;
                        if (be16_to_cpu(fqd.fq_ctrl) & QM_FQCTRL_CGE &&
                            fqd.cgid == cgrid) {
                                pr_err("CRGID 0x%x is being used by FQID 0x%x, CGR will be leaked\n",
                                       cgrid, fq.fqid);
                                return -EIO;
                        }
                }
                /* Move to the next FQID */
                fq.fqid++;
        } while (1);
}

int qman_release_cgrid(u32 cgrid)
{
        int ret;

        ret = cgr_cleanup(cgrid);
        if (ret) {
                pr_debug("CGRID %d leaked\n", cgrid);
                return ret;
        }

        gen_pool_free(qm_cgralloc, cgrid | DPAA_GENALLOC_OFF, 1);
        return 0;
}
EXPORT_SYMBOL(qman_release_cgrid);