[dpdk.git] / drivers / bus / dpaa / base / qbman / qman.c

/* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
 *
 * Copyright 2008-2016 Freescale Semiconductor Inc.
 * Copyright 2017 NXP
 *
 */

#include "qman.h"
#include <rte_branch_prediction.h>
#include <rte_dpaa_bus.h>

/* Compilation constants */
#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" */
/* maximum number of DQRR entries to process in qman_poll() */
#define FSL_QMAN_POLL_LIMIT 8

/* Lock/unlock frame queues, subject to the "LOCKED" flag. This is about
 * inter-processor locking only. Note, FQLOCK() is always called either under a
 * local_irq_save() or from interrupt context - hence there's no need for irq
 * protection (and indeed, attempting to nest irq-protection doesn't work, as
 * the "irq en/disable" machinery isn't recursive...).
 */
#define FQLOCK(fq) \
        do { \
                struct qman_fq *__fq478 = (fq); \
                if (fq_isset(__fq478, QMAN_FQ_FLAG_LOCKED)) \
                        spin_lock(&__fq478->fqlock); \
        } while (0)
#define FQUNLOCK(fq) \
        do { \
                struct qman_fq *__fq478 = (fq); \
                if (fq_isset(__fq478, QMAN_FQ_FLAG_LOCKED)) \
                        spin_unlock(&__fq478->fqlock); \
        } while (0)

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

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

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;
        u32 slowpoll;   /* only used when interrupts are off */
        /* only 1 volatile dequeue at a time */
        struct qman_fq *vdqcr_owned;
        u32 sdqcr;
        int dqrr_disable_ref;
        /* A portal-specific handler for DCP ERNs. If this is NULL, the global
         * handler is called instead.
         */
        qman_cb_dc_ern cb_dc_ern;
        /* When the cpu-affine portal is activated, this is non-NULL */
        const struct qm_portal_config *config;
        struct dpa_rbtree retire_table;
        char irqname[MAX_IRQNAME];
        /* 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;
        /* track if memory was allocated by the driver */
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        /* Keep a shadow copy of the DQRR on LE systems as the SW needs to
         * do byte swaps of DQRR read only memory.  First entry must be aligned
         * to 2 ** 10 to ensure DQRR index calculations based shadow copy
         * address (6 bits for address shift + 4 bits for the DQRR size).
         */
        struct qm_dqrr_entry shadow_dqrr[QM_DQRR_SIZE]
                    __attribute__((aligned(1024)));
#endif
};

/* Global handler for DCP ERNs. Used when the portal receiving the message does
 * not have a portal-specific handler.
 */
static qman_cb_dc_ern cb_dc_ern;

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

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

/* This gives a FQID->FQ lookup to cover the fact that we can't directly demux
 * retirement notifications (the fact they are sometimes h/w-consumed means that
 * contextB isn't always a s/w demux - and as we can't know which case it is
 * when looking at the notification, we have to use the slow lookup for all of
 * them). NB, it's possible to have multiple FQ objects refer to the same FQID
 * (though at most one of them should be the consumer), so this table isn't for
 * all FQs - FQs are added when retirement commands are issued, and removed when
 * they complete, which also massively reduces the size of this table.
 */
IMPLEMENT_DPAA_RBTREE(fqtree, struct qman_fq, node, fqid);
/*
 * 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 inline int table_push_fq(struct qman_portal *p, struct qman_fq *fq)
{
        int ret = fqtree_push(&p->retire_table, fq);

        if (ret)
                pr_err("ERROR: double FQ-retirement %d\n", fq->fqid);
        return ret;
}

static inline void table_del_fq(struct qman_portal *p, struct qman_fq *fq)
{
        fqtree_del(&p->retire_table, fq);
}

static inline struct qman_fq *table_find_fq(struct qman_portal *p, u32 fqid)
{
        return fqtree_find(&p->retire_table, fqid);
}

#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
static void **qman_fq_lookup_table;
static size_t qman_fq_lookup_table_size;

int qman_setup_fq_lookup_table(size_t num_entries)
{
        num_entries++;
        /* Allocate 1 more entry since the first entry is not used */
        qman_fq_lookup_table = vmalloc((num_entries * sizeof(void *)));
        if (!qman_fq_lookup_table) {
                pr_err("QMan: Could not allocate fq lookup table\n");
                return -ENOMEM;
        }
        memset(qman_fq_lookup_table, 0, num_entries * sizeof(void *));
        qman_fq_lookup_table_size = num_entries;
        pr_debug("QMan: Allocated lookup table at %p, entry count %lu\n",
                qman_fq_lookup_table,
                        (unsigned long)qman_fq_lookup_table_size);
        return 0;
}

/* global structure that maintains fq object mapping */
static DEFINE_SPINLOCK(fq_hash_table_lock);

static int find_empty_fq_table_entry(u32 *entry, struct qman_fq *fq)
{
        u32 i;

        spin_lock(&fq_hash_table_lock);
        /* Can't use index zero because this has special meaning
         * in context_b field.
         */
        for (i = 1; i < qman_fq_lookup_table_size; i++) {
                if (qman_fq_lookup_table[i] == NULL) {
                        *entry = i;
                        qman_fq_lookup_table[i] = fq;
                        spin_unlock(&fq_hash_table_lock);
                        return 0;
                }
        }
        spin_unlock(&fq_hash_table_lock);
        return -ENOMEM;
}

static void clear_fq_table_entry(u32 entry)
{
        spin_lock(&fq_hash_table_lock);
        DPAA_BUG_ON(entry >= qman_fq_lookup_table_size);
        qman_fq_lookup_table[entry] = NULL;
        spin_unlock(&fq_hash_table_lock);
}

static inline struct qman_fq *get_fq_table_entry(u32 entry)
{
        DPAA_BUG_ON(entry >= qman_fq_lookup_table_size);
        return qman_fq_lookup_table[entry];
}
#endif

static inline void cpu_to_hw_fqd(struct qm_fqd *fqd)
{
        /* Byteswap the FQD to HW format */
        fqd->fq_ctrl = cpu_to_be16(fqd->fq_ctrl);
        fqd->dest_wq = cpu_to_be16(fqd->dest_wq);
        fqd->ics_cred = cpu_to_be16(fqd->ics_cred);
        fqd->context_b = cpu_to_be32(fqd->context_b);
        fqd->context_a.opaque = cpu_to_be64(fqd->context_a.opaque);
        fqd->opaque_td = cpu_to_be16(fqd->opaque_td);
}

static inline void hw_fqd_to_cpu(struct qm_fqd *fqd)
{
        /* Byteswap the FQD to CPU format */
        fqd->fq_ctrl = be16_to_cpu(fqd->fq_ctrl);
        fqd->dest_wq = be16_to_cpu(fqd->dest_wq);
        fqd->ics_cred = be16_to_cpu(fqd->ics_cred);
        fqd->context_b = be32_to_cpu(fqd->context_b);
        fqd->context_a.opaque = be64_to_cpu(fqd->context_a.opaque);
}

static inline void cpu_to_hw_fd(struct qm_fd *fd)
{
        fd->addr = cpu_to_be40(fd->addr);
        fd->status = cpu_to_be32(fd->status);
        fd->opaque = cpu_to_be32(fd->opaque);
}

static inline void hw_fd_to_cpu(struct qm_fd *fd)
{
        fd->addr = be40_to_cpu(fd->addr);
        fd->status = be32_to_cpu(fd->status);
        fd->opaque = be32_to_cpu(fd->opaque);
}

/* In the case that slow- and fast-path handling are both done by qman_poll()
 * (ie. because there is no interrupt handling), we ought to balance how often
 * we do the fast-path poll versus the slow-path poll. We'll use two decrementer
 * sources, so we call the fast poll 'n' times before calling the slow poll
 * once. The idle decrementer constant is used when the last slow-poll detected
 * no work to do, and the busy decrementer constant when the last slow-poll had
 * work to do.
 */
#define SLOW_POLL_IDLE   1000
#define SLOW_POLL_BUSY   10
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);

/* Portal interrupt handler */
static irqreturn_t portal_isr(__always_unused int irq, void *ptr)
{
        struct qman_portal *p = ptr;
        /*
         * The CSCI/CCSCI source is cleared inside __poll_portal_slow(), because
         * it could race against a Query Congestion State command also given
         * as part of the handling of this interrupt source. We mustn't
         * clear it a second time in this top-level function.
         */
        u32 clear = QM_DQAVAIL_MASK | (p->irq_sources &
                ~(QM_PIRQ_CSCI | QM_PIRQ_CCSCI));
        u32 is = qm_isr_status_read(&p->p) & p->irq_sources;
        /* DQRR-handling if it's interrupt-driven */
        if (is & QM_PIRQ_DQRI)
                __poll_portal_fast(p, FSL_QMAN_POLL_LIMIT);
        /* Handling of anything else that's interrupt-driven */
        clear |= __poll_portal_slow(p, is);
        qm_isr_status_clear(&p->p, clear);
        return IRQ_HANDLED;
}

/* This inner version is used privately by qman_create_affine_portal(), as well
 * as by the exported qman_stop_dequeues().
 */
static inline void qman_stop_dequeues_ex(struct qman_portal *p)
{
        if (!(p->dqrr_disable_ref++))
                qm_dqrr_set_maxfill(&p->p, 0);
}

static int drain_mr_fqrni(struct qm_portal *p)
{
        const struct 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.
                 */
                u64 now, then = mfatb();

                do {
                        now = mfatb();
                } while ((then + 10000) > now);
                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 inline int qm_eqcr_init(struct qm_portal *portal,
                               enum qm_eqcr_pmode pmode,
                               unsigned int eq_stash_thresh,
                               int eq_stash_prio)
{
        /* This use of 'register', as well as all other occurrences, is because
         * it has been observed to generate much faster code with gcc than is
         * otherwise the case.
         */
        register struct qm_eqcr *eqcr = &portal->eqcr;
        u32 cfg;
        u8 pi;

        eqcr->ring = portal->addr.ce + QM_CL_EQCR;
        eqcr->ci = qm_in(EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);
        qm_cl_invalidate(EQCR_CI);
        pi = qm_in(EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
        eqcr->cursor = eqcr->ring + pi;
        eqcr->vbit = (qm_in(EQCR_PI_CINH) & QM_EQCR_SIZE) ?
                        QM_EQCR_VERB_VBIT : 0;
        eqcr->available = QM_EQCR_SIZE - 1 -
                        qm_cyc_diff(QM_EQCR_SIZE, eqcr->ci, pi);
        eqcr->ithresh = qm_in(EQCR_ITR);
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        eqcr->busy = 0;
        eqcr->pmode = pmode;
#endif
        cfg = (qm_in(CFG) & 0x00ffffff) |
                (eq_stash_thresh << 28) | /* QCSP_CFG: EST */
                (eq_stash_prio << 26)   | /* QCSP_CFG: EP */
                ((pmode & 0x3) << 24);  /* QCSP_CFG::EPM */
        qm_out(CFG, cfg);
        return 0;
}

static inline void qm_eqcr_finish(struct qm_portal *portal)
{
        register struct qm_eqcr *eqcr = &portal->eqcr;
        u8 pi, ci;
        u32 cfg;

        /*
         * Disable EQCI stashing because the QMan only
         * presents the value it previously stashed to
         * maintain coherency.  Setting the stash threshold
         * to 1 then 0 ensures that QMan has resyncronized
         * its internal copy so that the portal is clean
         * when it is reinitialized in the future
         */
        cfg = (qm_in(CFG) & 0x0fffffff) |
                (1 << 28); /* QCSP_CFG: EST */
        qm_out(CFG, cfg);
        cfg &= 0x0fffffff; /* stash threshold = 0 */
        qm_out(CFG, cfg);

        pi = qm_in(EQCR_PI_CINH) & (QM_EQCR_SIZE - 1);
        ci = qm_in(EQCR_CI_CINH) & (QM_EQCR_SIZE - 1);

        /* Refresh EQCR CI cache value */
        qm_cl_invalidate(EQCR_CI);
        eqcr->ci = qm_cl_in(EQCR_CI) & (QM_EQCR_SIZE - 1);

#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        DPAA_ASSERT(!eqcr->busy);
#endif
        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 int qm_dqrr_init(struct qm_portal *portal,
                        __maybe_unused const struct qm_portal_config *config,
                        enum qm_dqrr_dmode dmode,
                        __maybe_unused enum qm_dqrr_pmode pmode,
                        enum qm_dqrr_cmode cmode, u8 max_fill)
{
        register struct qm_dqrr *dqrr = &portal->dqrr;
        u32 cfg;

        /* Make sure the DQRR will be idle when we enable */
        qm_out(DQRR_SDQCR, 0);
        qm_out(DQRR_VDQCR, 0);
        qm_out(DQRR_PDQCR, 0);
        dqrr->ring = portal->addr.ce + QM_CL_DQRR;
        dqrr->pi = qm_in(DQRR_PI_CINH) & (QM_DQRR_SIZE - 1);
        dqrr->ci = qm_in(DQRR_CI_CINH) & (QM_DQRR_SIZE - 1);
        dqrr->cursor = dqrr->ring + dqrr->ci;
        dqrr->fill = qm_cyc_diff(QM_DQRR_SIZE, dqrr->ci, dqrr->pi);
        dqrr->vbit = (qm_in(DQRR_PI_CINH) & QM_DQRR_SIZE) ?
                        QM_DQRR_VERB_VBIT : 0;
        dqrr->ithresh = qm_in(DQRR_ITR);
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        dqrr->dmode = dmode;
        dqrr->pmode = pmode;
        dqrr->cmode = cmode;
#endif
        /* Invalidate every ring entry before beginning */
        for (cfg = 0; cfg < QM_DQRR_SIZE; cfg++)
                dccivac(qm_cl(dqrr->ring, cfg));
        cfg = (qm_in(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(CFG, cfg);
        qm_dqrr_set_maxfill(portal, max_fill);
        return 0;
}

static inline void qm_dqrr_finish(struct qm_portal *portal)
{
        __maybe_unused register struct qm_dqrr *dqrr = &portal->dqrr;
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        if ((dqrr->cmode != qm_dqrr_cdc) &&
            (dqrr->ci != DQRR_PTR2IDX(dqrr->cursor)))
                pr_crit("Ignoring completed DQRR entries\n");
#endif
}

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

        mr->ring = portal->addr.ce + QM_CL_MR;
        mr->pi = qm_in(MR_PI_CINH) & (QM_MR_SIZE - 1);
        mr->ci = qm_in(MR_CI_CINH) & (QM_MR_SIZE - 1);
        mr->cursor = mr->ring + mr->ci;
        mr->fill = qm_cyc_diff(QM_MR_SIZE, mr->ci, mr->pi);
        mr->vbit = (qm_in(MR_PI_CINH) & QM_MR_SIZE) ? QM_MR_VERB_VBIT : 0;
        mr->ithresh = qm_in(MR_ITR);
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        mr->pmode = pmode;
        mr->cmode = cmode;
#endif
        cfg = (qm_in(CFG) & 0xfffff0ff) |
                ((cmode & 1) << 8);             /* QCSP_CFG:MM */
        qm_out(CFG, cfg);
        return 0;
}

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

#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        DPAA_ASSERT(mr->pmode == qm_mr_pvb);
#endif
        /* when accessing 'verb', use __raw_readb() to ensure that compiler
         * inlining doesn't try to optimise out "excess reads".
         */
        if ((__raw_readb(&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);
        }
        dcbit_ro(res);
}

static inline
struct qman_portal *qman_create_portal(
                        struct qman_portal *portal,
                              const struct qm_portal_config *c,
                              const struct qman_cgrs *cgrs)
{
        struct qm_portal *p;
        char buf[16];
        int ret;
        u32 isdr;

        p = &portal->p;

        if (dpaa_svr_family == SVR_LS1043A_FAMILY)
                portal->use_eqcr_ci_stashing = 3;
        else
                portal->use_eqcr_ci_stashing =
                                        ((qman_ip_rev >= QMAN_REV30) ? 1 : 0);

        /*
         * 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[DPAA_PORTAL_CE];
        p->addr.ci = c->addr_virt[DPAA_PORTAL_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, 1)) {
                pr_err("Qman EQCR initialisation failed\n");
                goto fail_eqcr;
        }
        if (qm_dqrr_init(p, c, qm_dqrr_dpush, qm_dqrr_pvb,
                         qm_dqrr_cdc, DQRR_MAXFILL)) {
                pr_err("Qman DQRR initialisation failed\n");
                goto fail_dqrr;
        }
        if (qm_mr_init(p, qm_mr_pvb, qm_mr_cci)) {
                pr_err("Qman MR initialisation failed\n");
                goto fail_mr;
        }
        if (qm_mc_init(p)) {
                pr_err("Qman MC initialisation failed\n");
                goto fail_mc;
        }

        /* static interrupt-gating controls */
        qm_dqrr_set_ithresh(p, 0);
        qm_mr_set_ithresh(p, 0);
        qm_isr_set_iperiod(p, 0);
        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);
        portal->bits = 0;
        portal->slowpoll = 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;
        portal->dqrr_disable_ref = 0;
        portal->cb_dc_ern = NULL;
        sprintf(buf, "qportal-%d", c->channel);
        dpa_rbtree_init(&portal->retire_table);
        isdr = 0xffffffff;
        qm_isr_disable_write(p, isdr);
        portal->irq_sources = 0;
        qm_isr_enable_write(p, portal->irq_sources);
        qm_isr_status_clear(p, 0xffffffff);
        snprintf(portal->irqname, MAX_IRQNAME, IRQNAME, c->cpu);
        if (request_irq(c->irq, portal_isr, 0, portal->irqname,
                        portal)) {
                pr_err("request_irq() failed\n");
                goto fail_irq;
        }

        /* Need EQCR to be empty before continuing */
        isdr &= ~QM_PIRQ_EQCI;
        qm_isr_disable_write(p, isdr);
        ret = qm_eqcr_get_fill(p);
        if (ret) {
                pr_err("Qman EQCR unclean\n");
                goto fail_eqcr_empty;
        }
        isdr &= ~(QM_PIRQ_DQRI | QM_PIRQ_MRI);
        qm_isr_disable_write(p, isdr);
        if (qm_dqrr_current(p)) {
                pr_err("Qman 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 */
                if (drain_mr_fqrni(p))
                        goto fail_dqrr_mr_empty;
        }
        /* Success */
        portal->config = c;
        qm_isr_disable_write(p, 0);
        qm_isr_uninhibit(p);
        /* Write a sane SDQCR */
        qm_dqrr_sdqcr_set(p, portal->sdqcr);
        return portal;
fail_dqrr_mr_empty:
fail_eqcr_empty:
        free_irq(c->irq, portal);
fail_irq:
        kfree(portal->cgrs);
        spin_lock_destroy(&portal->cgr_lock);
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 NULL;
}

#define MAX_GLOBAL_PORTALS 8
static struct qman_portal global_portals[MAX_GLOBAL_PORTALS];
static int global_portals_used[MAX_GLOBAL_PORTALS];

static struct qman_portal *
qman_alloc_global_portal(void)
{
        unsigned int i;

        for (i = 0; i < MAX_GLOBAL_PORTALS; i++) {
                if (global_portals_used[i] == 0) {
                        global_portals_used[i] = 1;
                        return &global_portals[i];
                }
        }
        pr_err("No portal available (%x)\n", MAX_GLOBAL_PORTALS);

        return NULL;
}

static int
qman_free_global_portal(struct qman_portal *portal)
{
        unsigned int i;

        for (i = 0; i < MAX_GLOBAL_PORTALS; i++) {
                if (&global_portals[i] == portal) {
                        global_portals_used[i] = 0;
                        return 0;
                }
        }
        return -1;
}

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

        if (alloc)
                portal = qman_alloc_global_portal();
        else
                portal = get_affine_portal();

        /* A criteria for calling this function (from qman_driver.c) is that
         * we're already affine to the cpu and won't schedule onto another cpu.
         */

        res = qman_create_portal(portal, c, cgrs);
        if (res) {
                spin_lock(&affine_mask_lock);
                CPU_SET(c->cpu, &affine_mask);
                affine_channels[c->cpu] =
                        c->channel;
                spin_unlock(&affine_mask_lock);
        }
        return res;
}

static inline
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;

        spin_lock_destroy(&qm->cgr_lock);
}

const struct qm_portal_config *
qman_destroy_affine_portal(struct qman_portal *qp)
{
        /* We don't want to redirect if we're a slave, use "raw" */
        struct qman_portal *qm;
        const struct qm_portal_config *pcfg;
        int cpu;

        if (qp == NULL)
                qm = get_affine_portal();
        else
                qm = qp;
        pcfg = qm->config;
        cpu = pcfg->cpu;

        qman_destroy_portal(qm);

        spin_lock(&affine_mask_lock);
        CPU_CLR(cpu, &affine_mask);
        spin_unlock(&affine_mask_lock);

        qman_free_global_portal(qm);

        return pcfg;
}

int qman_get_portal_index(void)
{
        struct qman_portal *p = get_affine_portal();
        return p->config->index;
}

/* Inline helper to reduce nesting in __poll_portal_slow() */
static inline void fq_state_change(struct qman_portal *p, struct qman_fq *fq,
                                   const struct qm_mr_entry *msg, u8 verb)
{
        FQLOCK(fq);
        switch (verb) {
        case QM_MR_VERB_FQRL:
                DPAA_ASSERT(fq_isset(fq, QMAN_FQ_STATE_ORL));
                fq_clear(fq, QMAN_FQ_STATE_ORL);
                table_del_fq(p, fq);
                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);
                else
                        table_del_fq(p, fq);
                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;
        }
        FQUNLOCK(fq);
}

static u32 __poll_portal_slow(struct qman_portal *p, u32 is)
{
        const struct qm_mr_entry *msg;
        struct qm_mr_entry swapped_msg;

        if (is & QM_PIRQ_CSCI) {
                struct qman_cgrs rr, c;
                struct qm_mc_result *mcr;
                struct qman_cgr *cgr;

                spin_lock(&p->cgr_lock);
                /*
                 * The CSCI bit must be cleared _before_ issuing the
                 * Query Congestion State command, to ensure that a long
                 * CGR State Change callback cannot miss an intervening
                 * state change.
                 */
                qm_isr_status_clear(&p->p, QM_PIRQ_CSCI);
                qm_mc_start(&p->p);
                qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCONGESTION);
                while (!(mcr = qm_mc_result(&p->p)))
                        cpu_relax();
                /* mask out the ones I'm not interested in */
                qman_cgrs_and(&rr, (const 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);
        }

        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) {
                struct qman_fq *fq;
                u8 verb, num = 0;
mr_loop:
                qm_mr_pvb_update(&p->p);
                msg = qm_mr_current(&p->p);
                if (!msg)
                        goto mr_done;
                swapped_msg = *msg;
                hw_fd_to_cpu(&swapped_msg.ern.fd);
                verb = msg->verb & QM_MR_VERB_TYPE_MASK;
                /* The message is a software ERN iff the 0x20 bit is set */
                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 = table_find_fq(p,
                                                   be32_to_cpu(msg->fq.fqid));
                                DPAA_BUG_ON(!fq);
                                fq_state_change(p, fq, &swapped_msg, verb);
                                if (fq->cb.fqs)
                                        fq->cb.fqs(p, fq, &swapped_msg);
                                break;
                        case QM_MR_VERB_FQPN:
                                /* Parked */
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                                fq = get_fq_table_entry(
                                        be32_to_cpu(msg->fq.contextB));
#else
                                fq = (void *)(uintptr_t)
                                        be32_to_cpu(msg->fq.contextB);
#endif
                                fq_state_change(p, fq, msg, verb);
                                if (fq->cb.fqs)
                                        fq->cb.fqs(p, fq, &swapped_msg);
                                break;
                        case QM_MR_VERB_DC_ERN:
                                /* DCP ERN */
                                if (p->cb_dc_ern)
                                        p->cb_dc_ern(p, msg);
                                else if (cb_dc_ern)
                                        cb_dc_ern(p, msg);
                                else {
                                        static int warn_once;

                                        if (!warn_once) {
                                                pr_crit("Leaking DCP ERNs!\n");
                                                warn_once = 1;
                                        }
                                }
                                break;
                        default:
                                pr_crit("Invalid MR verb 0x%02x\n", verb);
                        }
                } else {
                        /* Its a software ERN */
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                        fq = get_fq_table_entry(be32_to_cpu(msg->ern.tag));
#else
                        fq = (void *)(uintptr_t)be32_to_cpu(msg->ern.tag);
#endif
                        fq->cb.ern(p, fq, &swapped_msg);
                }
                num++;
                qm_mr_next(&p->p);
                goto mr_loop;
mr_done:
                qm_mr_cci_consume(&p->p, num);
        }
        /*
         * QM_PIRQ_CSCI/CCSCI has already been cleared, as part of its specific
         * processing. If that interrupt source has meanwhile been re-asserted,
         * we mustn't clear it here (or in the top-level interrupt handler).
         */
        return is & (QM_PIRQ_EQCI | QM_PIRQ_EQRI | QM_PIRQ_MRI);
}

/*
 * 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;
        FQLOCK(fq);
        fq_clear(fq, QMAN_FQ_STATE_VDQCR);
        FQUNLOCK(fq);
        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_set_vdq() 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_set_vdq() 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;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        struct qm_dqrr_entry *shadow;
#endif
        do {
                qm_dqrr_pvb_update(&p->p);
                dq = qm_dqrr_current(&p->p);
                if (unlikely(!dq))
                        break;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        /* If running on an LE system the fields of the
         * dequeue entry must be swapper.  Because the
         * QMan HW will ignore writes the DQRR entry is
         * copied and the index stored within the copy
         */
                shadow = &p->shadow_dqrr[DQRR_PTR2IDX(dq)];
                *shadow = *dq;
                dq = shadow;
                shadow->fqid = be32_to_cpu(shadow->fqid);
                shadow->contextB = be32_to_cpu(shadow->contextB);
                shadow->seqnum = be16_to_cpu(shadow->seqnum);
                hw_fd_to_cpu(&shadow->fd);
#endif

                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 */
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                        fq = get_fq_table_entry(dq->contextB);
#else
                        fq = (void *)(uintptr_t)dq->contextB;
#endif
                        /* 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;
}

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

                cpu = portal->config->cpu;
        }
        DPAA_BUG_ON(!CPU_ISSET(cpu, &affine_mask));
        return affine_channels[cpu];
}

unsigned int qman_portal_poll_rx(unsigned int poll_limit,
                                 void **bufs,
                                 struct qman_portal *p)
{
        const struct qm_dqrr_entry *dq;
        struct qman_fq *fq;
        enum qman_cb_dqrr_result res;
        unsigned int limit = 0;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        struct qm_dqrr_entry *shadow;
#endif
        unsigned int rx_number = 0;

        do {
                qm_dqrr_pvb_update(&p->p);
                dq = qm_dqrr_current(&p->p);
                if (unlikely(!dq))
                        break;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        /* If running on an LE system the fields of the
         * dequeue entry must be swapper.  Because the
         * QMan HW will ignore writes the DQRR entry is
         * copied and the index stored within the copy
         */
                shadow = &p->shadow_dqrr[DQRR_PTR2IDX(dq)];
                *shadow = *dq;
                dq = shadow;
                shadow->fqid = be32_to_cpu(shadow->fqid);
                shadow->contextB = be32_to_cpu(shadow->contextB);
                shadow->seqnum = be16_to_cpu(shadow->seqnum);
                hw_fd_to_cpu(&shadow->fd);
#endif

                /* SDQCR: context_b points to the FQ */
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                fq = get_fq_table_entry(dq->contextB);
#else
                fq = (void *)(uintptr_t)dq->contextB;
#endif
                /* Now let the callback do its stuff */
                res = fq->cb.dqrr_dpdk_cb(NULL, p, fq, dq, &bufs[rx_number]);
                rx_number++;
                /* 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));
                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 (likely(++limit < poll_limit));

        return limit;
}

struct qm_dqrr_entry *qman_dequeue(struct qman_fq *fq)
{
        struct qman_portal *p = get_affine_portal();
        const struct qm_dqrr_entry *dq;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        struct qm_dqrr_entry *shadow;
#endif

        qm_dqrr_pvb_update(&p->p);
        dq = qm_dqrr_current(&p->p);
        if (!dq)
                return NULL;

        if (!(dq->stat & QM_DQRR_STAT_FD_VALID)) {
                /* Invalid DQRR - put the portal and consume the DQRR.
                 * Return NULL to user as no packet is seen.
                 */
                qman_dqrr_consume(fq, (struct qm_dqrr_entry *)dq);
                return NULL;
        }

#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
        shadow = &p->shadow_dqrr[DQRR_PTR2IDX(dq)];
        *shadow = *dq;
        dq = shadow;
        shadow->fqid = be32_to_cpu(shadow->fqid);
        shadow->contextB = be32_to_cpu(shadow->contextB);
        shadow->seqnum = be16_to_cpu(shadow->seqnum);
        hw_fd_to_cpu(&shadow->fd);
#endif

        if (dq->stat & QM_DQRR_STAT_FQ_EMPTY)
                fq_clear(fq, QMAN_FQ_STATE_NE);

        return (struct qm_dqrr_entry *)dq;
}

void qman_dqrr_consume(struct qman_fq *fq,
                       struct qm_dqrr_entry *dq)
{
        struct qman_portal *p = get_affine_portal();

        if (dq->stat & QM_DQRR_STAT_DQCR_EXPIRED)
                clear_vdqcr(p, fq);

        qm_dqrr_cdc_consume_1ptr(&p->p, dq, 0);
        qm_dqrr_next(&p->p);
}

int qman_poll_dqrr(unsigned int limit)
{
        struct qman_portal *p = get_affine_portal();
        int ret;

        ret = __poll_portal_fast(p, limit);
        return ret;
}

void qman_poll(void)
{
        struct qman_portal *p = get_affine_portal();

        if ((~p->irq_sources) & QM_PIRQ_SLOW) {
                if (!(p->slowpoll--)) {
                        u32 is = qm_isr_status_read(&p->p) & ~p->irq_sources;
                        u32 active = __poll_portal_slow(p, is);

                        if (active) {
                                qm_isr_status_clear(&p->p, active);
                                p->slowpoll = SLOW_POLL_BUSY;
                        } else
                                p->slowpoll = SLOW_POLL_IDLE;
                }
        }
        if ((~p->irq_sources) & QM_PIRQ_DQRI)
                __poll_portal_fast(p, FSL_QMAN_POLL_LIMIT);
}

void qman_stop_dequeues(void)
{
        struct qman_portal *p = get_affine_portal();

        qman_stop_dequeues_ex(p);
}

void qman_start_dequeues(void)
{
        struct qman_portal *p = get_affine_portal();

        DPAA_ASSERT(p->dqrr_disable_ref > 0);
        if (!(--p->dqrr_disable_ref))
                qm_dqrr_set_maxfill(&p->p, DQRR_MAXFILL);
}

void qman_static_dequeue_add(u32 pools, struct qman_portal *qp)
{
        struct qman_portal *p = qp ? qp : get_affine_portal();

        pools &= p->config->pools;
        p->sdqcr |= pools;
        qm_dqrr_sdqcr_set(&p->p, p->sdqcr);
}

void qman_static_dequeue_del(u32 pools, struct qman_portal *qp)
{
        struct qman_portal *p = qp ? qp : get_affine_portal();

        pools &= p->config->pools;
        p->sdqcr &= ~pools;
        qm_dqrr_sdqcr_set(&p->p, p->sdqcr);
}

u32 qman_static_dequeue_get(struct qman_portal *qp)
{
        struct qman_portal *p = qp ? qp : get_affine_portal();
        return p->sdqcr;
}

void qman_dca(struct qm_dqrr_entry *dq, int park_request)
{
        struct qman_portal *p = get_affine_portal();

        qm_dqrr_cdc_consume_1ptr(&p->p, dq, park_request);
}

/* 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)
{
        struct qm_fqd fqd;
        struct qm_mcr_queryfq_np np;
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p;

        if (flags & QMAN_FQ_FLAG_DYNAMIC_FQID) {
                int ret = qman_alloc_fqid(&fqid);

                if (ret)
                        return ret;
        }
        spin_lock_init(&fq->fqlock);
        fq->fqid = fqid;
        fq->fqid_le = cpu_to_be32(fqid);
        fq->flags = flags;
        fq->state = qman_fq_state_oos;
        fq->cgr_groupid = 0;
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
        if (unlikely(find_empty_fq_table_entry(&fq->key, fq))) {
                pr_info("Find empty table entry failed\n");
                return -ENOMEM;
        }
#endif
        if (!(flags & QMAN_FQ_FLAG_AS_IS) || (flags & QMAN_FQ_FLAG_NO_MODIFY))
                return 0;
        /* Everything else is AS_IS support */
        p = get_affine_portal();
        mcc = qm_mc_start(&p->p);
        mcc->queryfq.fqid = cpu_to_be32(fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYFQ);
        if (mcr->result != QM_MCR_RESULT_OK) {
                pr_err("QUERYFQ failed: %s\n", mcr_result_str(mcr->result));
                goto err;
        }
        fqd = mcr->queryfq.fqd;
        hw_fqd_to_cpu(&fqd);
        mcc = qm_mc_start(&p->p);
        mcc->queryfq_np.fqid = cpu_to_be32(fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYFQ_NP);
        if (mcr->result != QM_MCR_RESULT_OK) {
                pr_err("QUERYFQ_NP failed: %s\n", mcr_result_str(mcr->result));
                goto err;
        }
        np = mcr->queryfq_np;
        /* Phew, have queryfq and queryfq_np results, stitch together
         * the FQ object from those.
         */
        fq->cgr_groupid = fqd.cgid;
        switch (np.state & QM_MCR_NP_STATE_MASK) {
        case QM_MCR_NP_STATE_OOS:
                break;
        case QM_MCR_NP_STATE_RETIRED:
                fq->state = qman_fq_state_retired;
                if (np.frm_cnt)
                        fq_set(fq, QMAN_FQ_STATE_NE);
                break;
        case QM_MCR_NP_STATE_TEN_SCHED:
        case QM_MCR_NP_STATE_TRU_SCHED:
        case QM_MCR_NP_STATE_ACTIVE:
                fq->state = qman_fq_state_sched;
                if (np.state & QM_MCR_NP_STATE_R)
                        fq_set(fq, QMAN_FQ_STATE_CHANGING);
                break;
        case QM_MCR_NP_STATE_PARKED:
                fq->state = qman_fq_state_parked;
                break;
        default:
                DPAA_ASSERT(NULL == "invalid FQ state");
        }
        if (fqd.fq_ctrl & QM_FQCTRL_CGE)
                fq->state |= QMAN_FQ_STATE_CGR_EN;
        return 0;
err:
        if (flags & QMAN_FQ_FLAG_DYNAMIC_FQID)
                qman_release_fqid(fqid);
        return -EIO;
}

void qman_destroy_fq(struct qman_fq *fq, u32 flags __maybe_unused)
{
        /*
         * 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:
                DPAA_ASSERT(flags & QMAN_FQ_DESTROY_PARKED);
                /* Fallthrough */
        case qman_fq_state_oos:
                if (fq_isset(fq, QMAN_FQ_FLAG_DYNAMIC_FQID))
                        qman_release_fqid(fq->fqid);
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                clear_fq_table_entry(fq->key);
#endif
                return;
        default:
                break;
        }
        DPAA_ASSERT(NULL == "qman_free_fq() on unquiesced FQ!");
}

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

void qman_fq_state(struct qman_fq *fq, enum qman_fq_state *state, u32 *flags)
{
        if (state)
                *state = fq->state;
        if (flags)
                *flags = fq->flags;
}

int qman_init_fq(struct qman_fq *fq, u32 flags, struct qm_mcc_initfq *opts)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p;

        u8 res, 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 RTE_LIBRTE_DPAA_HWDEBUG
        if (unlikely(fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY)))
                return -EINVAL;
#endif
        if (opts && (opts->we_mask & QM_INITFQ_WE_OAC)) {
                /* And can't be set at the same time as TDTHRESH */
                if (opts->we_mask & QM_INITFQ_WE_TDTHRESH)
                        return -EINVAL;
        }
        /* Issue an INITFQ_[PARKED|SCHED] management command */
        p = get_affine_portal();
        FQLOCK(fq);
        if (unlikely((fq_isset(fq, QMAN_FQ_STATE_CHANGING)) ||
                     ((fq->state != qman_fq_state_oos) &&
                                (fq->state != qman_fq_state_parked)))) {
                FQUNLOCK(fq);
                return -EBUSY;
        }
        mcc = qm_mc_start(&p->p);
        if (opts)
                mcc->initfq = *opts;
        mcc->initfq.fqid = cpu_to_be32(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 |= QM_INITFQ_WE_CONTEXTB;
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                mcc->initfq.fqd.context_b = fq->key;
#else
                mcc->initfq.fqd.context_b = (u32)(uintptr_t)fq;
#endif
                /*
                 *  and the physical address - NB, if the user wasn't trying to
                 * set CONTEXTA, clear the stashing settings.
                 */
                if (!(mcc->initfq.we_mask & QM_INITFQ_WE_CONTEXTA)) {
                        mcc->initfq.we_mask |= QM_INITFQ_WE_CONTEXTA;
                        memset(&mcc->initfq.fqd.context_a, 0,
                               sizeof(mcc->initfq.fqd.context_a));
                } else {
                        phys_fq = rte_mem_virt2iova(fq);
                        qm_fqd_stashing_set64(&mcc->initfq.fqd, phys_fq);
                }
        }
        if (flags & QMAN_INITFQ_FLAG_LOCAL) {
                mcc->initfq.fqd.dest.channel = p->config->channel;
                if (!(mcc->initfq.we_mask & QM_INITFQ_WE_DESTWQ)) {
                        mcc->initfq.we_mask |= QM_INITFQ_WE_DESTWQ;
                        mcc->initfq.fqd.dest.wq = 4;
                }
        }
        mcc->initfq.we_mask = cpu_to_be16(mcc->initfq.we_mask);
        cpu_to_hw_fqd(&mcc->initfq.fqd);
        qm_mc_commit(&p->p, myverb);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);
        res = mcr->result;
        if (res != QM_MCR_RESULT_OK) {
                FQUNLOCK(fq);
                return -EIO;
        }
        if (opts) {
                if (opts->we_mask & QM_INITFQ_WE_FQCTRL) {
                        if (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 (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;
        FQUNLOCK(fq);
        return 0;
}

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

        int ret = 0;
        u8 res;

        if (fq->state != qman_fq_state_parked)
                return -EINVAL;
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        if (unlikely(fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY)))
                return -EINVAL;
#endif
        /* Issue a ALTERFQ_SCHED management command */
        p = get_affine_portal();

        FQLOCK(fq);
        if (unlikely((fq_isset(fq, QMAN_FQ_STATE_CHANGING)) ||
                     (fq->state != qman_fq_state_parked))) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        mcc->alterfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_SCHED);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_SCHED);
        res = mcr->result;
        if (res != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
        fq->state = qman_fq_state_sched;
out:
        FQUNLOCK(fq);

        return ret;
}

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

        int rval;
        u8 res;

        if ((fq->state != qman_fq_state_parked) &&
            (fq->state != qman_fq_state_sched))
                return -EINVAL;
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        if (unlikely(fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY)))
                return -EINVAL;
#endif
        p = get_affine_portal();

        FQLOCK(fq);
        if (unlikely((fq_isset(fq, QMAN_FQ_STATE_CHANGING)) ||
                     (fq->state == qman_fq_state_retired) ||
                                (fq->state == qman_fq_state_oos))) {
                rval = -EBUSY;
                goto out;
        }
        rval = table_push_fq(p, fq);
        if (rval)
                goto out;
        mcc = qm_mc_start(&p->p);
        mcc->alterfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_RETIRE);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        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 (likely(res == QM_MCR_RESULT_OK)) {
                rval = 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);
                else
                        table_del_fq(p, fq);
                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...
                         */
                        struct qm_mr_entry msg;

                        msg.verb = QM_MR_VERB_FQRNI;
                        msg.fq.fqs = mcr->alterfq.fqs;
                        msg.fq.fqid = fq->fqid;
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                        msg.fq.contextB = fq->key;
#else
                        msg.fq.contextB = (u32)(uintptr_t)fq;
#endif
                        fq->cb.fqs(p, fq, &msg);
                }
        } else if (res == QM_MCR_RESULT_PENDING) {
                rval = 1;
                fq_set(fq, QMAN_FQ_STATE_CHANGING);
        } else {
                rval = -EIO;
                table_del_fq(p, fq);
        }
out:
        FQUNLOCK(fq);
        return rval;
}

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

        int ret = 0;
        u8 res;

        if (fq->state != qman_fq_state_retired)
                return -EINVAL;
#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        if (unlikely(fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY)))
                return -EINVAL;
#endif
        p = get_affine_portal();
        FQLOCK(fq);
        if (unlikely((fq_isset(fq, QMAN_FQ_STATE_BLOCKOOS)) ||
                     (fq->state != qman_fq_state_retired))) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        mcc->alterfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_ALTER_OOS);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_ALTER_OOS);
        res = mcr->result;
        if (res != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
        fq->state = qman_fq_state_oos;
out:
        FQUNLOCK(fq);
        return ret;
}

int qman_fq_flow_control(struct qman_fq *fq, int xon)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p;

        int ret = 0;
        u8 res;
        u8 myverb;

        if ((fq->state == qman_fq_state_oos) ||
            (fq->state == qman_fq_state_retired) ||
                (fq->state == qman_fq_state_parked))
                return -EINVAL;

#ifdef RTE_LIBRTE_DPAA_HWDEBUG
        if (unlikely(fq_isset(fq, QMAN_FQ_FLAG_NO_MODIFY)))
                return -EINVAL;
#endif
        /* Issue a ALTER_FQXON or ALTER_FQXOFF management command */
        p = get_affine_portal();
        FQLOCK(fq);
        if (unlikely((fq_isset(fq, QMAN_FQ_STATE_CHANGING)) ||
                     (fq->state == qman_fq_state_parked) ||
                        (fq->state == qman_fq_state_oos) ||
                        (fq->state == qman_fq_state_retired))) {
                ret = -EBUSY;
                goto out;
        }
        mcc = qm_mc_start(&p->p);
        mcc->alterfq.fqid = fq->fqid;
        mcc->alterfq.count = 0;
        myverb = xon ? QM_MCC_VERB_ALTER_FQXON : QM_MCC_VERB_ALTER_FQXOFF;

        qm_mc_commit(&p->p, myverb);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);

        res = mcr->result;
        if (res != QM_MCR_RESULT_OK) {
                ret = -EIO;
                goto out;
        }
out:
        FQUNLOCK(fq);
        return ret;
}

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

        u8 res;

        mcc = qm_mc_start(&p->p);
        mcc->queryfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK)
                *fqd = mcr->queryfq.fqd;
        hw_fqd_to_cpu(fqd);
        if (res != QM_MCR_RESULT_OK)
                return -EIO;
        return 0;
}

int qman_query_fq_has_pkts(struct qman_fq *fq)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();

        int ret = 0;
        u8 res;

        mcc = qm_mc_start(&p->p);
        mcc->queryfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK)
                ret = !!mcr->queryfq_np.frm_cnt;
        return ret;
}

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

        u8 res;

        mcc = qm_mc_start(&p->p);
        mcc->queryfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK) {
                *np = mcr->queryfq_np;
                np->fqd_link = be24_to_cpu(np->fqd_link);
                np->odp_seq = be16_to_cpu(np->odp_seq);
                np->orp_nesn = be16_to_cpu(np->orp_nesn);
                np->orp_ea_hseq  = be16_to_cpu(np->orp_ea_hseq);
                np->orp_ea_tseq  = be16_to_cpu(np->orp_ea_tseq);
                np->orp_ea_hptr = be24_to_cpu(np->orp_ea_hptr);
                np->orp_ea_tptr = be24_to_cpu(np->orp_ea_tptr);
                np->pfdr_hptr = be24_to_cpu(np->pfdr_hptr);
                np->pfdr_tptr = be24_to_cpu(np->pfdr_tptr);
                np->ics_surp = be16_to_cpu(np->ics_surp);
                np->byte_cnt = be32_to_cpu(np->byte_cnt);
                np->frm_cnt = be24_to_cpu(np->frm_cnt);
                np->ra1_sfdr = be16_to_cpu(np->ra1_sfdr);
                np->ra2_sfdr = be16_to_cpu(np->ra2_sfdr);
                np->od1_sfdr = be16_to_cpu(np->od1_sfdr);
                np->od2_sfdr = be16_to_cpu(np->od2_sfdr);
                np->od3_sfdr = be16_to_cpu(np->od3_sfdr);
        }
        if (res == QM_MCR_RESULT_ERR_FQID)
                return -ERANGE;
        else if (res != QM_MCR_RESULT_OK)
                return -EIO;
        return 0;
}

int qman_query_fq_frm_cnt(struct qman_fq *fq, u32 *frm_cnt)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();

        mcc = qm_mc_start(&p->p);
        mcc->queryfq.fqid = cpu_to_be32(fq->fqid);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYFQ_NP);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ_NP);

        if (mcr->result == QM_MCR_RESULT_OK)
                *frm_cnt = be24_to_cpu(mcr->queryfq_np.frm_cnt);
        else if (mcr->result == QM_MCR_RESULT_ERR_FQID)
                return -ERANGE;
        else if (mcr->result != QM_MCR_RESULT_OK)
                return -EIO;
        return 0;
}

int qman_query_wq(u8 query_dedicated, struct qm_mcr_querywq *wq)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();

        u8 res, myverb;

        myverb = (query_dedicated) ? QM_MCR_VERB_QUERYWQ_DEDICATED :
                                 QM_MCR_VERB_QUERYWQ;
        mcc = qm_mc_start(&p->p);
        mcc->querywq.channel.id = cpu_to_be16(wq->channel.id);
        qm_mc_commit(&p->p, myverb);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == myverb);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK) {
                int i, array_len;

                wq->channel.id = be16_to_cpu(mcr->querywq.channel.id);
                array_len = ARRAY_SIZE(mcr->querywq.wq_len);
                for (i = 0; i < array_len; i++)
                        wq->wq_len[i] = be32_to_cpu(mcr->querywq.wq_len[i]);
        }
        if (res != QM_MCR_RESULT_OK) {
                pr_err("QUERYWQ failed: %s\n", mcr_result_str(res));
                return -EIO;
        }
        return 0;
}

int qman_testwrite_cgr(struct qman_cgr *cgr, u64 i_bcnt,
                       struct qm_mcr_cgrtestwrite *result)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();

        u8 res;

        mcc = qm_mc_start(&p->p);
        mcc->cgrtestwrite.cgid = cgr->cgrid;
        mcc->cgrtestwrite.i_bcnt_hi = (u8)(i_bcnt >> 32);
        mcc->cgrtestwrite.i_bcnt_lo = (u32)i_bcnt;
        qm_mc_commit(&p->p, QM_MCC_VERB_CGRTESTWRITE);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_CGRTESTWRITE);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK)
                *result = mcr->cgrtestwrite;
        if (res != QM_MCR_RESULT_OK) {
                pr_err("CGR TEST WRITE failed: %s\n", mcr_result_str(res));
                return -EIO;
        }
        return 0;
}

int qman_query_cgr(struct qman_cgr *cgr, struct qm_mcr_querycgr *cgrd)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        u8 res;
        unsigned int i;

        mcc = qm_mc_start(&p->p);
        mcc->querycgr.cgid = cgr->cgrid;
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCGR);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCC_VERB_QUERYCGR);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK)
                *cgrd = mcr->querycgr;
        if (res != QM_MCR_RESULT_OK) {
                pr_err("QUERY_CGR failed: %s\n", mcr_result_str(res));
                return -EIO;
        }
        cgrd->cgr.wr_parm_g.word =
                be32_to_cpu(cgrd->cgr.wr_parm_g.word);
        cgrd->cgr.wr_parm_y.word =
                be32_to_cpu(cgrd->cgr.wr_parm_y.word);
        cgrd->cgr.wr_parm_r.word =
                be32_to_cpu(cgrd->cgr.wr_parm_r.word);
        cgrd->cgr.cscn_targ =  be32_to_cpu(cgrd->cgr.cscn_targ);
        cgrd->cgr.__cs_thres = be16_to_cpu(cgrd->cgr.__cs_thres);
        for (i = 0; i < ARRAY_SIZE(cgrd->cscn_targ_swp); i++)
                cgrd->cscn_targ_swp[i] =
                        be32_to_cpu(cgrd->cscn_targ_swp[i]);
        return 0;
}

int qman_query_congestion(struct qm_mcr_querycongestion *congestion)
{
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();
        u8 res;
        unsigned int i;

        qm_mc_start(&p->p);
        qm_mc_commit(&p->p, QM_MCC_VERB_QUERYCONGESTION);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                        QM_MCC_VERB_QUERYCONGESTION);
        res = mcr->result;
        if (res == QM_MCR_RESULT_OK)
                *congestion = mcr->querycongestion;
        if (res != QM_MCR_RESULT_OK) {
                pr_err("QUERY_CONGESTION failed: %s\n", mcr_result_str(res));
                return -EIO;
        }
        for (i = 0; i < ARRAY_SIZE(congestion->state.state); i++)
                congestion->state.state[i] =
                        be32_to_cpu(congestion->state.state[i]);
        return 0;
}

int qman_set_vdq(struct qman_fq *fq, u16 num)
{
        struct qman_portal *p = get_affine_portal();
        uint32_t vdqcr;
        int ret = -EBUSY;

        vdqcr = QM_VDQCR_EXACT;
        vdqcr |= QM_VDQCR_NUMFRAMES_SET(num);

        if ((fq->state != qman_fq_state_parked) &&
            (fq->state != qman_fq_state_retired)) {
                ret = -EINVAL;
                goto out;
        }
        if (fq_isset(fq, QMAN_FQ_STATE_VDQCR)) {
                ret = -EBUSY;
                goto out;
        }
        vdqcr = (vdqcr & ~QM_VDQCR_FQID_MASK) | fq->fqid;

        if (!p->vdqcr_owned) {
                FQLOCK(fq);
                if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
                        goto escape;
                fq_set(fq, QMAN_FQ_STATE_VDQCR);
                FQUNLOCK(fq);
                p->vdqcr_owned = fq;
                ret = 0;
        }
escape:
        if (!ret)
                qm_dqrr_vdqcr_set(&p->p, vdqcr);

out:
        return ret;
}

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

        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;

        p = get_affine_portal();

        if (!p->vdqcr_owned) {
                FQLOCK(fq);
                if (fq_isset(fq, QMAN_FQ_STATE_VDQCR))
                        goto escape;
                fq_set(fq, QMAN_FQ_STATE_VDQCR);
                FQUNLOCK(fq);
                p->vdqcr_owned = fq;
                ret = 0;
        }
escape:
        if (ret)
                return ret;

        /* VDQCR is set */
        qm_dqrr_vdqcr_set(&p->p, vdqcr);
        return 0;
}

static noinline 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_eqcr_is_empty(void)
{
        struct qman_portal *p = get_affine_portal();
        u8 avail;

        update_eqcr_ci(p, 0);
        avail = qm_eqcr_get_fill(&p->p);
        return (avail == 0);
}

void qman_set_dc_ern(qman_cb_dc_ern handler, int affine)
{
        if (affine) {
                struct qman_portal *p = get_affine_portal();

                p->cb_dc_ern = handler;
        } else
                cb_dc_ern = handler;
}

static inline struct qm_eqcr_entry *try_p_eq_start(struct qman_portal *p,
                                        struct qman_fq *fq,
                                        const struct qm_fd *fd,
                                        u32 flags)
{
        struct qm_eqcr_entry *eq;
        u8 avail;

        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))
                return NULL;

        if (flags & QMAN_ENQUEUE_FLAG_DCA)
                eq->dca = QM_EQCR_DCA_ENABLE |
                        ((flags & QMAN_ENQUEUE_FLAG_DCA_PARK) ?
                                        QM_EQCR_DCA_PARK : 0) |
                        ((flags >> 8) & QM_EQCR_DCA_IDXMASK);
        eq->fqid = cpu_to_be32(fq->fqid);
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
        eq->tag = cpu_to_be32(fq->key);
#else
        eq->tag = cpu_to_be32((u32)(uintptr_t)fq);
#endif
        eq->fd = *fd;
        cpu_to_hw_fd(&eq->fd);
        return eq;
}

int qman_enqueue(struct qman_fq *fq, const struct qm_fd *fd, u32 flags)
{
        struct qman_portal *p = get_affine_portal();
        struct qm_eqcr_entry *eq;

        eq = try_p_eq_start(p, fq, fd, flags);
        if (!eq)
                return -EBUSY;
        /* Note: QM_EQCR_VERB_INTERRUPT == QMAN_ENQUEUE_FLAG_WAIT_SYNC */
        qm_eqcr_pvb_commit(&p->p, QM_EQCR_VERB_CMD_ENQUEUE |
                (flags & (QM_EQCR_VERB_COLOUR_MASK | QM_EQCR_VERB_INTERRUPT)));
        /* Factor the below out, it's used from qman_enqueue_orp() too */
        return 0;
}

int qman_enqueue_multi(struct qman_fq *fq,
                       const struct qm_fd *fd,
                       int frames_to_send)
{
        struct qman_portal *p = get_affine_portal();
        struct qm_portal *portal = &p->p;

        register struct qm_eqcr *eqcr = &portal->eqcr;
        struct qm_eqcr_entry *eq = eqcr->cursor, *prev_eq;

        u8 i, diff, old_ci, sent = 0;

        /* Update the available entries if no entry is free */
        if (!eqcr->available) {
                old_ci = eqcr->ci;
                eqcr->ci = qm_cl_in(EQCR_CI) & (QM_EQCR_SIZE - 1);
                diff = qm_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
                eqcr->available += diff;
                if (!diff)
                        return 0;
        }

        /* try to send as many frames as possible */
        while (eqcr->available && frames_to_send--) {
                eq->fqid = fq->fqid_le;
#ifdef CONFIG_FSL_QMAN_FQ_LOOKUP
                eq->tag = cpu_to_be32(fq->key);
#else
                eq->tag = cpu_to_be32((u32)(uintptr_t)fq);
#endif
                eq->fd.opaque_addr = fd->opaque_addr;
                eq->fd.addr = cpu_to_be40(fd->addr);
                eq->fd.status = cpu_to_be32(fd->status);
                eq->fd.opaque = cpu_to_be32(fd->opaque);

                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
                eqcr->available--;
                sent++;
                fd++;
        }
        lwsync();

        /* In order for flushes to complete faster, all lines are recorded in
         * 32 bit word.
         */
        eq = eqcr->cursor;
        for (i = 0; i < sent; i++) {
                eq->__dont_write_directly__verb =
                        QM_EQCR_VERB_CMD_ENQUEUE | eqcr->vbit;
                prev_eq = eq;
                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
                if (unlikely((prev_eq + 1) != eq))
                        eqcr->vbit ^= QM_EQCR_VERB_VBIT;
        }

        /* We need  to flush all the lines but without load/store operations
         * between them
         */
        eq = eqcr->cursor;
        for (i = 0; i < sent; i++) {
                dcbf(eq);
                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
        }
        /* Update cursor for the next call */
        eqcr->cursor = eq;
        return sent;
}

int
qman_enqueue_multi_fq(struct qman_fq *fq[], const struct qm_fd *fd,
                      int frames_to_send)
{
        struct qman_portal *p = get_affine_portal();
        struct qm_portal *portal = &p->p;

        register struct qm_eqcr *eqcr = &portal->eqcr;
        struct qm_eqcr_entry *eq = eqcr->cursor, *prev_eq;

        u8 i, diff, old_ci, sent = 0;

        /* Update the available entries if no entry is free */
        if (!eqcr->available) {
                old_ci = eqcr->ci;
                eqcr->ci = qm_cl_in(EQCR_CI) & (QM_EQCR_SIZE - 1);
                diff = qm_cyc_diff(QM_EQCR_SIZE, old_ci, eqcr->ci);
                eqcr->available += diff;
                if (!diff)
                        return 0;
        }

        /* try to send as many frames as possible */
        while (eqcr->available && frames_to_send--) {
                eq->fqid = fq[sent]->fqid_le;
                eq->fd.opaque_addr = fd->opaque_addr;
                eq->fd.addr = cpu_to_be40(fd->addr);
                eq->fd.status = cpu_to_be32(fd->status);
                eq->fd.opaque = cpu_to_be32(fd->opaque);

                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
                eqcr->available--;
                sent++;
                fd++;
        }
        lwsync();

        /* In order for flushes to complete faster, all lines are recorded in
         * 32 bit word.
         */
        eq = eqcr->cursor;
        for (i = 0; i < sent; i++) {
                eq->__dont_write_directly__verb =
                        QM_EQCR_VERB_CMD_ENQUEUE | eqcr->vbit;
                prev_eq = eq;
                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
                if (unlikely((prev_eq + 1) != eq))
                        eqcr->vbit ^= QM_EQCR_VERB_VBIT;
        }

        /* We need  to flush all the lines but without load/store operations
         * between them
         */
        eq = eqcr->cursor;
        for (i = 0; i < sent; i++) {
                dcbf(eq);
                eq = (void *)((unsigned long)(eq + 1) &
                        (~(unsigned long)(QM_EQCR_SIZE << 6)));
        }
        /* Update cursor for the next call */
        eqcr->cursor = eq;
        return sent;
}

int qman_enqueue_orp(struct qman_fq *fq, const struct qm_fd *fd, u32 flags,
                     struct qman_fq *orp, u16 orp_seqnum)
{
        struct qman_portal *p  = get_affine_portal();
        struct qm_eqcr_entry *eq;

        eq = try_p_eq_start(p, fq, fd, flags);
        if (!eq)
                return -EBUSY;
        /* Process ORP-specifics here */
        if (flags & QMAN_ENQUEUE_FLAG_NLIS)
                orp_seqnum |= QM_EQCR_SEQNUM_NLIS;
        else {
                orp_seqnum &= ~QM_EQCR_SEQNUM_NLIS;
                if (flags & QMAN_ENQUEUE_FLAG_NESN)
                        orp_seqnum |= QM_EQCR_SEQNUM_NESN;
                else
                        /* No need to check 4 QMAN_ENQUEUE_FLAG_HOLE */
                        orp_seqnum &= ~QM_EQCR_SEQNUM_NESN;
        }
        eq->seqnum = cpu_to_be16(orp_seqnum);
        eq->orp = cpu_to_be32(orp->fqid);
        /* Note: QM_EQCR_VERB_INTERRUPT == QMAN_ENQUEUE_FLAG_WAIT_SYNC */
        qm_eqcr_pvb_commit(&p->p, QM_EQCR_VERB_ORP |
                ((flags & (QMAN_ENQUEUE_FLAG_HOLE | QMAN_ENQUEUE_FLAG_NESN)) ?
                                0 : QM_EQCR_VERB_CMD_ENQUEUE) |
                (flags & (QM_EQCR_VERB_COLOUR_MASK | QM_EQCR_VERB_INTERRUPT)));

        return 0;
}

int qman_modify_cgr(struct qman_cgr *cgr, u32 flags,
                    struct qm_mcc_initcgr *opts)
{
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        struct qman_portal *p = get_affine_portal();

        u8 res;
        u8 verb = QM_MCC_VERB_MODIFYCGR;

        mcc = qm_mc_start(&p->p);
        if (opts)
                mcc->initcgr = *opts;
        mcc->initcgr.we_mask = cpu_to_be16(mcc->initcgr.we_mask);
        mcc->initcgr.cgr.wr_parm_g.word =
                cpu_to_be32(mcc->initcgr.cgr.wr_parm_g.word);
        mcc->initcgr.cgr.wr_parm_y.word =
                cpu_to_be32(mcc->initcgr.cgr.wr_parm_y.word);
        mcc->initcgr.cgr.wr_parm_r.word =
                cpu_to_be32(mcc->initcgr.cgr.wr_parm_r.word);
        mcc->initcgr.cgr.cscn_targ =  cpu_to_be32(mcc->initcgr.cgr.cscn_targ);
        mcc->initcgr.cgr.__cs_thres = cpu_to_be16(mcc->initcgr.cgr.__cs_thres);

        mcc->initcgr.cgid = cgr->cgrid;
        if (flags & QMAN_CGR_FLAG_USE_INIT)
                verb = QM_MCC_VERB_INITCGR;
        qm_mc_commit(&p->p, verb);
        while (!(mcr = qm_mc_result(&p->p)))
                cpu_relax();

        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == verb);
        res = mcr->result;
        return (res == QM_MCR_RESULT_OK) ? 0 : -EIO;
}

#define TARG_MASK(n) (0x80000000 >> (n->config->channel - \
                                        QM_CHANNEL_SWPORTAL0))
#define TARG_DCP_MASK(n) (0x80000000 >> (10 + n))
#define PORTAL_IDX(n) (n->config->channel - QM_CHANNEL_SWPORTAL0)

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

        p = get_affine_portal();

        memset(&local_opts, 0, sizeof(struct qm_mcc_initcgr));
        cgr->chan = p->config->channel;
        spin_lock(&p->cgr_lock);

        /* if no opts specified, just add it to the list */
        if (!opts)
                goto add_list;

        ret = qman_query_cgr(cgr, &cgr_state);
        if (ret)
                goto release_lock;
        if (opts)
                local_opts = *opts;
        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                local_opts.cgr.cscn_targ_upd_ctrl =
                        QM_CGR_TARG_UDP_CTRL_WRITE_BIT | PORTAL_IDX(p);
        else
                /* Overwrite TARG */
                local_opts.cgr.cscn_targ = cgr_state.cgr.cscn_targ |
                                                        TARG_MASK(p);
        local_opts.we_mask |= QM_CGR_WE_CSCN_TARG;

        /* send init if flags indicate so */
        if (opts && (flags & QMAN_CGR_FLAG_USE_INIT))
                ret = qman_modify_cgr(cgr, QMAN_CGR_FLAG_USE_INIT, &local_opts);
        else
                ret = qman_modify_cgr(cgr, 0, &local_opts);
        if (ret)
                goto release_lock;
add_list:
        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, but screen
                 * and wail to the log file.
                 */
                pr_crit("CGR HW state partially modified\n");
                ret = 0;
                goto release_lock;
        }
        if (cgr->cb && cgr_state.cgr.cscn_en && qman_cgrs_get(&p->cgrs[1],
                                                              cgr->cgrid))
                cgr->cb(p, cgr, 1);
release_lock:
        spin_unlock(&p->cgr_lock);
        return ret;
}

int qman_create_cgr_to_dcp(struct qman_cgr *cgr, u32 flags, u16 dcp_portal,
                           struct qm_mcc_initcgr *opts)
{
        struct qm_mcc_initcgr local_opts;
        struct qm_mcr_querycgr cgr_state;
        int ret;

        if ((qman_ip_rev & 0xFF00) < QMAN_REV30) {
                pr_warn("QMan version doesn't support CSCN => DCP portal\n");
                return -EINVAL;
        }
        /* 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;

        ret = qman_query_cgr(cgr, &cgr_state);
        if (ret)
                return ret;

        memset(&local_opts, 0, sizeof(struct qm_mcc_initcgr));
        if (opts)
                local_opts = *opts;

        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                local_opts.cgr.cscn_targ_upd_ctrl =
                                QM_CGR_TARG_UDP_CTRL_WRITE_BIT |
                                QM_CGR_TARG_UDP_CTRL_DCP | dcp_portal;
        else
                local_opts.cgr.cscn_targ = cgr_state.cgr.cscn_targ |
                                        TARG_DCP_MASK(dcp_portal);
        local_opts.we_mask |= QM_CGR_WE_CSCN_TARG;

        /* send init if flags indicate so */
        if (opts && (flags & QMAN_CGR_FLAG_USE_INIT))
                ret = qman_modify_cgr(cgr, QMAN_CGR_FLAG_USE_INIT,
                                      &local_opts);
        else
                ret = qman_modify_cgr(cgr, 0, &local_opts);

        return ret;
}

int qman_delete_cgr(struct qman_cgr *cgr)
{
        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) {
                pr_crit("Attempting to delete cgr from different portal than"
                        " it was create: 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(&p->cgr_lock);
        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;
        }
        /* Overwrite TARG */
        local_opts.we_mask = QM_CGR_WE_CSCN_TARG;
        if ((qman_ip_rev & 0xFF00) >= QMAN_REV30)
                local_opts.cgr.cscn_targ_upd_ctrl = PORTAL_IDX(p);
        else
                local_opts.cgr.cscn_targ = cgr_state.cgr.cscn_targ &
                                                         ~(TARG_MASK(p));
        ret = qman_modify_cgr(cgr, 0, &local_opts);
        if (ret)
                /* add back to the list */
                list_add(&cgr->node, &p->cgr_cbs);
release_lock:
        spin_unlock(&p->cgr_lock);
put_portal:
        return ret;
}

int qman_shutdown_fq(u32 fqid)
{
        struct qman_portal *p;
        struct qm_portal *low_p;
        struct qm_mc_command *mcc;
        struct qm_mc_result *mcr;
        u8 state;
        int orl_empty, fq_empty, drain = 0;
        u32 result;
        u32 channel, wq;
        u16 dest_wq;

        p = get_affine_portal();
        low_p = &p->p;

        /* Determine the state of the FQID */
        mcc = qm_mc_start(low_p);
        mcc->queryfq_np.fqid = cpu_to_be32(fqid);
        qm_mc_commit(low_p, QM_MCC_VERB_QUERYFQ_NP);
        while (!(mcr = qm_mc_result(low_p)))
                cpu_relax();
        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)
                return 0; /* Already OOS, no need to do anymore checks */

        /* Query which channel the FQ is using */
        mcc = qm_mc_start(low_p);
        mcc->queryfq.fqid = cpu_to_be32(fqid);
        qm_mc_commit(low_p, QM_MCC_VERB_QUERYFQ);
        while (!(mcr = qm_mc_result(low_p)))
                cpu_relax();
        DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) == QM_MCR_VERB_QUERYFQ);

        /* Need to store these since the MCR gets reused */
        dest_wq = be16_to_cpu(mcr->queryfq.fqd.dest_wq);
        channel = dest_wq & 0x7;
        wq = dest_wq >> 3;

        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(low_p);
                mcc->alterfq.fqid = cpu_to_be32(fqid);
                qm_mc_commit(low_p, QM_MCC_VERB_ALTER_RETIRE);
                while (!(mcr = qm_mc_result(low_p)))
                        cpu_relax();
                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                           QM_MCR_VERB_ALTER_RETIRE);
                result = mcr->result; /* Make a copy as we reuse MCR below */

                if (result == 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
                         */
                        const struct qm_mr_entry *msg;
                        const struct qm_dqrr_entry *dqrr = NULL;
                        int found_fqrn = 0;
                        __maybe_unused u16 dequeue_wq = 0;

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

                        if (channel >= qm_channel_pool1 &&
                            channel < (u16)(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 {
                                pr_info("Cannot recover FQ 0x%x,"
                                        " it is scheduled on channel 0x%x",
                                        fqid, channel);
                                return -EBUSY;
                        }
                        /* Set the sdqcr to drain this channel */
                        if (channel < qm_channel_pool1)
                                qm_dqrr_sdqcr_set(low_p,
                                                  QM_SDQCR_TYPE_ACTIVE |
                                          QM_SDQCR_CHANNELS_DEDICATED);
                        else
                                qm_dqrr_sdqcr_set(low_p,
                                                  QM_SDQCR_TYPE_ACTIVE |
                                                  QM_SDQCR_CHANNELS_POOL_CONV
                                                  (channel));
                        while (!found_fqrn) {
                                /* Keep draining DQRR while checking the MR*/
                                qm_dqrr_pvb_update(low_p);
                                dqrr = qm_dqrr_current(low_p);
                                while (dqrr) {
                                        qm_dqrr_cdc_consume_1ptr(
                                                low_p, dqrr, 0);
                                        qm_dqrr_pvb_update(low_p);
                                        qm_dqrr_next(low_p);
                                        dqrr = qm_dqrr_current(low_p);
                                }
                                /* Process message ring too */
                                qm_mr_pvb_update(low_p);
                                msg = qm_mr_current(low_p);
                                while (msg) {
                                        if ((msg->verb &
                                             QM_MR_VERB_TYPE_MASK)
                                            == QM_MR_VERB_FQRN)
                                                found_fqrn = 1;
                                        qm_mr_next(low_p);
                                        qm_mr_cci_consume_to_current(low_p);
                                        qm_mr_pvb_update(low_p);
                                        msg = qm_mr_current(low_p);
                                }
                                cpu_relax();
                        }
                }
                if (result != QM_MCR_RESULT_OK &&
                    result !=  QM_MCR_RESULT_PENDING) {
                        /* error */
                        pr_err("qman_retire_fq failed on FQ 0x%x,"
                               " result=0x%x\n", fqid, result);
                        return -1;
                }
                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 */
                        fq_empty = 0;
                        do {
                                const struct qm_dqrr_entry *dqrr = NULL;
                                u32 vdqcr = fqid | QM_VDQCR_NUMFRAMES_SET(3);

                                qm_dqrr_vdqcr_set(low_p, vdqcr);

                                /* Wait for a dequeue to occur */
                                while (dqrr == NULL) {
                                        qm_dqrr_pvb_update(low_p);
                                        dqrr = qm_dqrr_current(low_p);
                                        if (!dqrr)
                                                cpu_relax();
                                }
                                /* Process the dequeues, making sure to
                                 * empty the ring completely.
                                 */
                                while (dqrr) {
                                        if (dqrr->fqid == fqid &&
                                            dqrr->stat & QM_DQRR_STAT_FQ_EMPTY)
                                                fq_empty = 1;
                                        qm_dqrr_cdc_consume_1ptr(low_p,
                                                                 dqrr, 0);
                                        qm_dqrr_pvb_update(low_p);
                                        qm_dqrr_next(low_p);
                                        dqrr = qm_dqrr_current(low_p);
                                }
                        } while (fq_empty == 0);
                }
                qm_dqrr_sdqcr_set(low_p, 0);

                /* Wait for the ORL to have been completely drained */
                while (orl_empty == 0) {
                        const struct qm_mr_entry *msg;

                        qm_mr_pvb_update(low_p);
                        msg = qm_mr_current(low_p);
                        while (msg) {
                                if ((msg->verb & QM_MR_VERB_TYPE_MASK) ==
                                    QM_MR_VERB_FQRL)
                                        orl_empty = 1;
                                qm_mr_next(low_p);
                                qm_mr_cci_consume_to_current(low_p);
                                qm_mr_pvb_update(low_p);
                                msg = qm_mr_current(low_p);
                        }
                        cpu_relax();
                }
                mcc = qm_mc_start(low_p);
                mcc->alterfq.fqid = cpu_to_be32(fqid);
                qm_mc_commit(low_p, QM_MCC_VERB_ALTER_OOS);
                while (!(mcr = qm_mc_result(low_p)))
                        cpu_relax();
                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                           QM_MCR_VERB_ALTER_OOS);
                if (mcr->result != QM_MCR_RESULT_OK) {
                        pr_err(
                        "OOS after drain Failed on FQID 0x%x, result 0x%x\n",
                               fqid, mcr->result);
                        return -1;
                }
                return 0;

        case QM_MCR_NP_STATE_RETIRED:
                /* Send OOS Command */
                mcc = qm_mc_start(low_p);
                mcc->alterfq.fqid = cpu_to_be32(fqid);
                qm_mc_commit(low_p, QM_MCC_VERB_ALTER_OOS);
                while (!(mcr = qm_mc_result(low_p)))
                        cpu_relax();
                DPAA_ASSERT((mcr->verb & QM_MCR_VERB_MASK) ==
                           QM_MCR_VERB_ALTER_OOS);
                if (mcr->result) {
                        pr_err("OOS Failed on FQID 0x%x\n", fqid);
                        return -1;
                }
                return 0;

        }
        return -1;
}