bus/dpaa: add QMAN driver core routines

[dpdk.git] / drivers / bus / dpaa / include / fsl_qman.h

/*-
 * This file is provided under a dual BSD/GPLv2 license. When using or
 * redistributing this file, you may do so under either license.
 *
 *   BSD LICENSE
 *
 * Copyright 2008-2012 Freescale Semiconductor, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the above-listed copyright holders nor the
 * names of any contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 *   GPL LICENSE SUMMARY
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __FSL_QMAN_H
#define __FSL_QMAN_H

#ifdef __cplusplus
extern "C" {
#endif

#include <dpaa_rbtree.h>

/* Last updated for v00.800 of the BG */

/* Hardware constants */
#define QM_CHANNEL_SWPORTAL0 0
#define QMAN_CHANNEL_POOL1 0x21
#define QMAN_CHANNEL_CAAM 0x80
#define QMAN_CHANNEL_PME 0xa0
#define QMAN_CHANNEL_POOL1_REV3 0x401
#define QMAN_CHANNEL_CAAM_REV3 0x840
#define QMAN_CHANNEL_PME_REV3 0x860
extern u16 qm_channel_pool1;
extern u16 qm_channel_caam;
extern u16 qm_channel_pme;
enum qm_dc_portal {
        qm_dc_portal_fman0 = 0,
        qm_dc_portal_fman1 = 1,
        qm_dc_portal_caam = 2,
        qm_dc_portal_pme = 3
};

/* Portal processing (interrupt) sources */
#define QM_PIRQ_CCSCI   0x00200000      /* CEETM Congestion State Change */
#define QM_PIRQ_CSCI    0x00100000      /* Congestion State Change */
#define QM_PIRQ_EQCI    0x00080000      /* Enqueue Command Committed */
#define QM_PIRQ_EQRI    0x00040000      /* EQCR Ring (below threshold) */
#define QM_PIRQ_DQRI    0x00020000      /* DQRR Ring (non-empty) */
#define QM_PIRQ_MRI     0x00010000      /* MR Ring (non-empty) */
/*
 * This mask contains all the interrupt sources that need handling except DQRI,
 * ie. that if present should trigger slow-path processing.
 */
#define QM_PIRQ_SLOW    (QM_PIRQ_CSCI | QM_PIRQ_EQCI | QM_PIRQ_EQRI | \
                        QM_PIRQ_MRI | QM_PIRQ_CCSCI)

/* For qman_static_dequeue_*** APIs */
#define QM_SDQCR_CHANNELS_POOL_MASK     0x00007fff
/* for n in [1,15] */
#define QM_SDQCR_CHANNELS_POOL(n)       (0x00008000 >> (n))
/* for conversion from n of qm_channel */
static inline u32 QM_SDQCR_CHANNELS_POOL_CONV(u16 channel)
{
        return QM_SDQCR_CHANNELS_POOL(channel + 1 - qm_channel_pool1);
}

/* For qman_volatile_dequeue(); Choose one PRECEDENCE. EXACT is optional. Use
 * NUMFRAMES(n) (6-bit) or NUMFRAMES_TILLEMPTY to fill in the frame-count. Use
 * FQID(n) to fill in the frame queue ID.
 */
#define QM_VDQCR_PRECEDENCE_VDQCR       0x0
#define QM_VDQCR_PRECEDENCE_SDQCR       0x80000000
#define QM_VDQCR_EXACT                  0x40000000
#define QM_VDQCR_NUMFRAMES_MASK         0x3f000000
#define QM_VDQCR_NUMFRAMES_SET(n)       (((n) & 0x3f) << 24)
#define QM_VDQCR_NUMFRAMES_GET(n)       (((n) >> 24) & 0x3f)
#define QM_VDQCR_NUMFRAMES_TILLEMPTY    QM_VDQCR_NUMFRAMES_SET(0)

/* --- QMan data structures (and associated constants) --- */

/* Represents s/w corenet portal mapped data structures */
struct qm_eqcr_entry;   /* EQCR (EnQueue Command Ring) entries */
struct qm_dqrr_entry;   /* DQRR (DeQueue Response Ring) entries */
struct qm_mr_entry;     /* MR (Message Ring) entries */
struct qm_mc_command;   /* MC (Management Command) command */
struct qm_mc_result;    /* MC result */

#define QM_FD_FORMAT_SG         0x4
#define QM_FD_FORMAT_LONG       0x2
#define QM_FD_FORMAT_COMPOUND   0x1
enum qm_fd_format {
        /*
         * 'contig' implies a contiguous buffer, whereas 'sg' implies a
         * scatter-gather table. 'big' implies a 29-bit length with no offset
         * field, otherwise length is 20-bit and offset is 9-bit. 'compound'
         * implies a s/g-like table, where each entry itself represents a frame
         * (contiguous or scatter-gather) and the 29-bit "length" is
         * interpreted purely for congestion calculations, ie. a "congestion
         * weight".
         */
        qm_fd_contig = 0,
        qm_fd_contig_big = QM_FD_FORMAT_LONG,
        qm_fd_sg = QM_FD_FORMAT_SG,
        qm_fd_sg_big = QM_FD_FORMAT_SG | QM_FD_FORMAT_LONG,
        qm_fd_compound = QM_FD_FORMAT_COMPOUND
};

/* Capitalised versions are un-typed but can be used in static expressions */
#define QM_FD_CONTIG    0
#define QM_FD_CONTIG_BIG QM_FD_FORMAT_LONG
#define QM_FD_SG        QM_FD_FORMAT_SG
#define QM_FD_SG_BIG    (QM_FD_FORMAT_SG | QM_FD_FORMAT_LONG)
#define QM_FD_COMPOUND  QM_FD_FORMAT_COMPOUND

/* "Frame Descriptor (FD)" */
struct qm_fd {
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u8 dd:2;        /* dynamic debug */
                        u8 liodn_offset:6;
                        u8 bpid:8;      /* Buffer Pool ID */
                        u8 eliodn_offset:4;
                        u8 __reserved:4;
                        u8 addr_hi;     /* high 8-bits of 40-bit address */
                        u32 addr_lo;    /* low 32-bits of 40-bit address */
#else
                        u8 liodn_offset:6;
                        u8 dd:2;        /* dynamic debug */
                        u8 bpid:8;      /* Buffer Pool ID */
                        u8 __reserved:4;
                        u8 eliodn_offset:4;
                        u8 addr_hi;     /* high 8-bits of 40-bit address */
                        u32 addr_lo;    /* low 32-bits of 40-bit address */
#endif
                };
                struct {
                        u64 __notaddress:24;
                        /* More efficient address accessor */
                        u64 addr:40;
                };
                u64 opaque_addr;
        };
        /* The 'format' field indicates the interpretation of the remaining 29
         * bits of the 32-bit word. For packing reasons, it is duplicated in the
         * other union elements. Note, union'd structs are difficult to use with
         * static initialisation under gcc, in which case use the "opaque" form
         * with one of the macros.
         */
        union {
                /* For easier/faster copying of this part of the fd (eg. from a
                 * DQRR entry to an EQCR entry) copy 'opaque'
                 */
                u32 opaque;
                /* If 'format' is _contig or _sg, 20b length and 9b offset */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        enum qm_fd_format format:3;
                        u16 offset:9;
                        u32 length20:20;
#else
                        u32 length20:20;
                        u16 offset:9;
                        enum qm_fd_format format:3;
#endif
                };
                /* If 'format' is _contig_big or _sg_big, 29b length */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        enum qm_fd_format _format1:3;
                        u32 length29:29;
#else
                        u32 length29:29;
                        enum qm_fd_format _format1:3;
#endif
                };
                /* If 'format' is _compound, 29b "congestion weight" */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        enum qm_fd_format _format2:3;
                        u32 cong_weight:29;
#else
                        u32 cong_weight:29;
                        enum qm_fd_format _format2:3;
#endif
                };
        };
        union {
                u32 cmd;
                u32 status;
        };
} __attribute__((aligned(8)));
#define QM_FD_DD_NULL           0x00
#define QM_FD_PID_MASK          0x3f
static inline u64 qm_fd_addr_get64(const struct qm_fd *fd)
{
        return fd->addr;
}

static inline dma_addr_t qm_fd_addr(const struct qm_fd *fd)
{
        return (dma_addr_t)fd->addr;
}

/* Macro, so we compile better if 'v' isn't always 64-bit */
#define qm_fd_addr_set64(fd, v) \
        do { \
                struct qm_fd *__fd931 = (fd); \
                __fd931->addr = v; \
        } while (0)

/* Scatter/Gather table entry */
struct qm_sg_entry {
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u8 __reserved1[3];
                        u8 addr_hi;     /* high 8-bits of 40-bit address */
                        u32 addr_lo;    /* low 32-bits of 40-bit address */
#else
                        u32 addr_lo;    /* low 32-bits of 40-bit address */
                        u8 addr_hi;     /* high 8-bits of 40-bit address */
                        u8 __reserved1[3];
#endif
                };
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u64 __notaddress:24;
                        u64 addr:40;
#else
                        u64 addr:40;
                        u64 __notaddress:24;
#endif
                };
                u64 opaque;
        };
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u32 extension:1;        /* Extension bit */
                        u32 final:1;            /* Final bit */
                        u32 length:30;
#else
                        u32 length:30;
                        u32 final:1;            /* Final bit */
                        u32 extension:1;        /* Extension bit */
#endif
                };
                u32 val;
        };
        u8 __reserved2;
        u8 bpid;
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 __reserved3:3;
                        u16 offset:13;
#else
                        u16 offset:13;
                        u16 __reserved3:3;
#endif
                };
                u16 val_off;
        };
} __packed;
static inline u64 qm_sg_entry_get64(const struct qm_sg_entry *sg)
{
        return sg->addr;
}

static inline dma_addr_t qm_sg_addr(const struct qm_sg_entry *sg)
{
        return (dma_addr_t)sg->addr;
}

/* Macro, so we compile better if 'v' isn't always 64-bit */
#define qm_sg_entry_set64(sg, v) \
        do { \
                struct qm_sg_entry *__sg931 = (sg); \
                __sg931->addr = v; \
        } while (0)

/* See 1.5.8.1: "Enqueue Command" */
struct qm_eqcr_entry {
        u8 __dont_write_directly__verb;
        u8 dca;
        u16 seqnum;
        u32 orp;        /* 24-bit */
        u32 fqid;       /* 24-bit */
        u32 tag;
        struct qm_fd fd;
        u8 __reserved3[32];
} __packed;


/* "Frame Dequeue Response" */
struct qm_dqrr_entry {
        u8 verb;
        u8 stat;
        u16 seqnum;     /* 15-bit */
        u8 tok;
        u8 __reserved2[3];
        u32 fqid;       /* 24-bit */
        u32 contextB;
        struct qm_fd fd;
        u8 __reserved4[32];
};

#define QM_DQRR_VERB_VBIT               0x80
#define QM_DQRR_VERB_MASK               0x7f    /* where the verb contains; */
#define QM_DQRR_VERB_FRAME_DEQUEUE      0x60    /* "this format" */
#define QM_DQRR_STAT_FQ_EMPTY           0x80    /* FQ empty */
#define QM_DQRR_STAT_FQ_HELDACTIVE      0x40    /* FQ held active */
#define QM_DQRR_STAT_FQ_FORCEELIGIBLE   0x20    /* FQ was force-eligible'd */
#define QM_DQRR_STAT_FD_VALID           0x10    /* has a non-NULL FD */
#define QM_DQRR_STAT_UNSCHEDULED        0x02    /* Unscheduled dequeue */
#define QM_DQRR_STAT_DQCR_EXPIRED       0x01    /* VDQCR or PDQCR expired*/


/* "ERN Message Response" */
/* "FQ State Change Notification" */
struct qm_mr_entry {
        u8 verb;
        union {
                struct {
                        u8 dca;
                        u16 seqnum;
                        u8 rc;          /* Rejection Code */
                        u32 orp:24;
                        u32 fqid;       /* 24-bit */
                        u32 tag;
                        struct qm_fd fd;
                } __packed ern;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u8 colour:2;    /* See QM_MR_DCERN_COLOUR_* */
                        u8 __reserved1:4;
                        enum qm_dc_portal portal:2;
#else
                        enum qm_dc_portal portal:3;
                        u8 __reserved1:3;
                        u8 colour:2;    /* See QM_MR_DCERN_COLOUR_* */
#endif
                        u16 __reserved2;
                        u8 rc;          /* Rejection Code */
                        u32 __reserved3:24;
                        u32 fqid;       /* 24-bit */
                        u32 tag;
                        struct qm_fd fd;
                } __packed dcern;
                struct {
                        u8 fqs;         /* Frame Queue Status */
                        u8 __reserved1[6];
                        u32 fqid;       /* 24-bit */
                        u32 contextB;
                        u8 __reserved2[16];
                } __packed fq;          /* FQRN/FQRNI/FQRL/FQPN */
        };
        u8 __reserved2[32];
} __packed;
#define QM_MR_VERB_VBIT                 0x80
/*
 * ERNs originating from direct-connect portals ("dcern") use 0x20 as a verb
 * which would be invalid as a s/w enqueue verb. A s/w ERN can be distinguished
 * from the other MR types by noting if the 0x20 bit is unset.
 */
#define QM_MR_VERB_TYPE_MASK            0x27
#define QM_MR_VERB_DC_ERN               0x20
#define QM_MR_VERB_FQRN                 0x21
#define QM_MR_VERB_FQRNI                0x22
#define QM_MR_VERB_FQRL                 0x23
#define QM_MR_VERB_FQPN                 0x24
#define QM_MR_RC_MASK                   0xf0    /* contains one of; */
#define QM_MR_RC_CGR_TAILDROP           0x00
#define QM_MR_RC_WRED                   0x10
#define QM_MR_RC_ERROR                  0x20
#define QM_MR_RC_ORPWINDOW_EARLY        0x30
#define QM_MR_RC_ORPWINDOW_LATE         0x40
#define QM_MR_RC_FQ_TAILDROP            0x50
#define QM_MR_RC_ORPWINDOW_RETIRED      0x60
#define QM_MR_RC_ORP_ZERO               0x70
#define QM_MR_FQS_ORLPRESENT            0x02    /* ORL fragments to come */
#define QM_MR_FQS_NOTEMPTY              0x01    /* FQ has enqueued frames */
#define QM_MR_DCERN_COLOUR_GREEN        0x00
#define QM_MR_DCERN_COLOUR_YELLOW       0x01
#define QM_MR_DCERN_COLOUR_RED          0x02
#define QM_MR_DCERN_COLOUR_OVERRIDE     0x03
/*
 * An identical structure of FQD fields is present in the "Init FQ" command and
 * the "Query FQ" result, it's suctioned out into the "struct qm_fqd" type.
 * Within that, the 'stashing' and 'taildrop' pieces are also factored out, the
 * latter has two inlines to assist with converting to/from the mant+exp
 * representation.
 */
struct qm_fqd_stashing {
        /* See QM_STASHING_EXCL_<...> */
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
        u8 exclusive;
        u8 __reserved1:2;
        /* Numbers of cachelines */
        u8 annotation_cl:2;
        u8 data_cl:2;
        u8 context_cl:2;
#else
        u8 context_cl:2;
        u8 data_cl:2;
        u8 annotation_cl:2;
        u8 __reserved1:2;
        u8 exclusive;
#endif
} __packed;
struct qm_fqd_taildrop {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
        u16 __reserved1:3;
        u16 mant:8;
        u16 exp:5;
#else
        u16 exp:5;
        u16 mant:8;
        u16 __reserved1:3;
#endif
} __packed;
struct qm_fqd_oac {
        /* "Overhead Accounting Control", see QM_OAC_<...> */
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
        u8 oac:2; /* "Overhead Accounting Control" */
        u8 __reserved1:6;
#else
        u8 __reserved1:6;
        u8 oac:2; /* "Overhead Accounting Control" */
#endif
        /* Two's-complement value (-128 to +127) */
        signed char oal; /* "Overhead Accounting Length" */
} __packed;
struct qm_fqd {
        union {
                u8 orpc;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u8 __reserved1:2;
                        u8 orprws:3;
                        u8 oa:1;
                        u8 olws:2;
#else
                        u8 olws:2;
                        u8 oa:1;
                        u8 orprws:3;
                        u8 __reserved1:2;
#endif
                } __packed;
        };
        u8 cgid;
        u16 fq_ctrl;    /* See QM_FQCTRL_<...> */
        union {
                u16 dest_wq;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 channel:13; /* qm_channel */
                        u16 wq:3;
#else
                        u16 wq:3;
                        u16 channel:13; /* qm_channel */
#endif
                } __packed dest;
        };
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
        u16 __reserved2:1;
        u16 ics_cred:15;
#else
        u16 __reserved2:1;
        u16 ics_cred:15;
#endif
        /*
         * For "Initialize Frame Queue" commands, the write-enable mask
         * determines whether 'td' or 'oac_init' is observed. For query
         * commands, this field is always 'td', and 'oac_query' (below) reflects
         * the Overhead ACcounting values.
         */
        union {
                uint16_t opaque_td;
                struct qm_fqd_taildrop td;
                struct qm_fqd_oac oac_init;
        };
        u32 context_b;
        union {
                /* Treat it as 64-bit opaque */
                u64 opaque;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u32 hi;
                        u32 lo;
#else
                        u32 lo;
                        u32 hi;
#endif
                };
                /* Treat it as s/w portal stashing config */
                /* see "FQD Context_A field used for [...]" */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        struct qm_fqd_stashing stashing;
                        /*
                         * 48-bit address of FQ context to
                         * stash, must be cacheline-aligned
                         */
                        u16 context_hi;
                        u32 context_lo;
#else
                        u32 context_lo;
                        u16 context_hi;
                        struct qm_fqd_stashing stashing;
#endif
                } __packed;
        } context_a;
        struct qm_fqd_oac oac_query;
} __packed;
/* 64-bit converters for context_hi/lo */
static inline u64 qm_fqd_stashing_get64(const struct qm_fqd *fqd)
{
        return ((u64)fqd->context_a.context_hi << 32) |
                (u64)fqd->context_a.context_lo;
}

static inline dma_addr_t qm_fqd_stashing_addr(const struct qm_fqd *fqd)
{
        return (dma_addr_t)qm_fqd_stashing_get64(fqd);
}

static inline u64 qm_fqd_context_a_get64(const struct qm_fqd *fqd)
{
        return ((u64)fqd->context_a.hi << 32) |
                (u64)fqd->context_a.lo;
}

static inline void qm_fqd_stashing_set64(struct qm_fqd *fqd, u64 addr)
{
                fqd->context_a.context_hi = upper_32_bits(addr);
                fqd->context_a.context_lo = lower_32_bits(addr);
}

static inline void qm_fqd_context_a_set64(struct qm_fqd *fqd, u64 addr)
{
        fqd->context_a.hi = upper_32_bits(addr);
        fqd->context_a.lo = lower_32_bits(addr);
}

/* convert a threshold value into mant+exp representation */
static inline int qm_fqd_taildrop_set(struct qm_fqd_taildrop *td, u32 val,
                                      int roundup)
{
        u32 e = 0;
        int oddbit = 0;

        if (val > 0xe0000000)
                return -ERANGE;
        while (val > 0xff) {
                oddbit = val & 1;
                val >>= 1;
                e++;
                if (roundup && oddbit)
                        val++;
        }
        td->exp = e;
        td->mant = val;
        return 0;
}

/* and the other direction */
static inline u32 qm_fqd_taildrop_get(const struct qm_fqd_taildrop *td)
{
        return (u32)td->mant << td->exp;
}


/* See "Frame Queue Descriptor (FQD)" */
/* Frame Queue Descriptor (FQD) field 'fq_ctrl' uses these constants */
#define QM_FQCTRL_MASK          0x07ff  /* 'fq_ctrl' flags; */
#define QM_FQCTRL_CGE           0x0400  /* Congestion Group Enable */
#define QM_FQCTRL_TDE           0x0200  /* Tail-Drop Enable */
#define QM_FQCTRL_ORP           0x0100  /* ORP Enable */
#define QM_FQCTRL_CTXASTASHING  0x0080  /* Context-A stashing */
#define QM_FQCTRL_CPCSTASH      0x0040  /* CPC Stash Enable */
#define QM_FQCTRL_FORCESFDR     0x0008  /* High-priority SFDRs */
#define QM_FQCTRL_AVOIDBLOCK    0x0004  /* Don't block active */
#define QM_FQCTRL_HOLDACTIVE    0x0002  /* Hold active in portal */
#define QM_FQCTRL_PREFERINCACHE 0x0001  /* Aggressively cache FQD */
#define QM_FQCTRL_LOCKINCACHE   QM_FQCTRL_PREFERINCACHE /* older naming */

/* See "FQD Context_A field used for [...] */
/* Frame Queue Descriptor (FQD) field 'CONTEXT_A' uses these constants */
#define QM_STASHING_EXCL_ANNOTATION     0x04
#define QM_STASHING_EXCL_DATA           0x02
#define QM_STASHING_EXCL_CTX            0x01

/* See "Intra Class Scheduling" */
/* FQD field 'OAC' (Overhead ACcounting) uses these constants */
#define QM_OAC_ICS              0x2 /* Accounting for Intra-Class Scheduling */
#define QM_OAC_CG               0x1 /* Accounting for Congestion Groups */

/*
 * This struct represents the 32-bit "WR_PARM_[GYR]" parameters in CGR fields
 * and associated commands/responses. The WRED parameters are calculated from
 * these fields as follows;
 *   MaxTH = MA * (2 ^ Mn)
 *   Slope = SA / (2 ^ Sn)
 *    MaxP = 4 * (Pn + 1)
 */
struct qm_cgr_wr_parm {
        union {
                u32 word;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u32 MA:8;
                        u32 Mn:5;
                        u32 SA:7; /* must be between 64-127 */
                        u32 Sn:6;
                        u32 Pn:6;
#else
                        u32 Pn:6;
                        u32 Sn:6;
                        u32 SA:7; /* must be between 64-127 */
                        u32 Mn:5;
                        u32 MA:8;
#endif
                } __packed;
        };
} __packed;
/*
 * This struct represents the 13-bit "CS_THRES" CGR field. In the corresponding
 * management commands, this is padded to a 16-bit structure field, so that's
 * how we represent it here. The congestion state threshold is calculated from
 * these fields as follows;
 *   CS threshold = TA * (2 ^ Tn)
 */
struct qm_cgr_cs_thres {
        union {
                u16 hword;
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 __reserved:3;
                        u16 TA:8;
                        u16 Tn:5;
#else
                        u16 Tn:5;
                        u16 TA:8;
                        u16 __reserved:3;
#endif
                } __packed;
        };
} __packed;
/*
 * This identical structure of CGR fields is present in the "Init/Modify CGR"
 * commands and the "Query CGR" result. It's suctioned out here into its own
 * struct.
 */
struct __qm_mc_cgr {
        struct qm_cgr_wr_parm wr_parm_g;
        struct qm_cgr_wr_parm wr_parm_y;
        struct qm_cgr_wr_parm wr_parm_r;
        u8 wr_en_g;     /* boolean, use QM_CGR_EN */
        u8 wr_en_y;     /* boolean, use QM_CGR_EN */
        u8 wr_en_r;     /* boolean, use QM_CGR_EN */
        u8 cscn_en;     /* boolean, use QM_CGR_EN */
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 cscn_targ_upd_ctrl; /* use QM_CSCN_TARG_UDP_ */
                        u16 cscn_targ_dcp_low;  /* CSCN_TARG_DCP low-16bits */
#else
                        u16 cscn_targ_dcp_low;  /* CSCN_TARG_DCP low-16bits */
                        u16 cscn_targ_upd_ctrl; /* use QM_CSCN_TARG_UDP_ */
#endif
                };
                u32 cscn_targ;  /* use QM_CGR_TARG_* */
        };
        u8 cstd_en;     /* boolean, use QM_CGR_EN */
        u8 cs;          /* boolean, only used in query response */
        union {
                struct qm_cgr_cs_thres cs_thres;
                /* use qm_cgr_cs_thres_set64() */
                u16 __cs_thres;
        };
        u8 mode;        /* QMAN_CGR_MODE_FRAME not supported in rev1.0 */
} __packed;
#define QM_CGR_EN               0x01 /* For wr_en_*, cscn_en, cstd_en */
#define QM_CGR_TARG_UDP_CTRL_WRITE_BIT  0x8000 /* value written to portal bit*/
#define QM_CGR_TARG_UDP_CTRL_DCP        0x4000 /* 0: SWP, 1: DCP */
#define QM_CGR_TARG_PORTAL(n)   (0x80000000 >> (n)) /* s/w portal, 0-9 */
#define QM_CGR_TARG_FMAN0       0x00200000 /* direct-connect portal: fman0 */
#define QM_CGR_TARG_FMAN1       0x00100000 /*                      : fman1 */
/* Convert CGR thresholds to/from "cs_thres" format */
static inline u64 qm_cgr_cs_thres_get64(const struct qm_cgr_cs_thres *th)
{
        return (u64)th->TA << th->Tn;
}

static inline int qm_cgr_cs_thres_set64(struct qm_cgr_cs_thres *th, u64 val,
                                        int roundup)
{
        u32 e = 0;
        int oddbit = 0;

        while (val > 0xff) {
                oddbit = val & 1;
                val >>= 1;
                e++;
                if (roundup && oddbit)
                        val++;
        }
        th->Tn = e;
        th->TA = val;
        return 0;
}

/* See 1.5.8.5.1: "Initialize FQ" */
/* See 1.5.8.5.2: "Query FQ" */
/* See 1.5.8.5.3: "Query FQ Non-Programmable Fields" */
/* See 1.5.8.5.4: "Alter FQ State Commands " */
/* See 1.5.8.6.1: "Initialize/Modify CGR" */
/* See 1.5.8.6.2: "CGR Test Write" */
/* See 1.5.8.6.3: "Query CGR" */
/* See 1.5.8.6.4: "Query Congestion Group State" */
struct qm_mcc_initfq {
        u8 __reserved1;
        u16 we_mask;    /* Write Enable Mask */
        u32 fqid;       /* 24-bit */
        u16 count;      /* Initialises 'count+1' FQDs */
        struct qm_fqd fqd; /* the FQD fields go here */
        u8 __reserved3[30];
} __packed;
struct qm_mcc_queryfq {
        u8 __reserved1[3];
        u32 fqid;       /* 24-bit */
        u8 __reserved2[56];
} __packed;
struct qm_mcc_queryfq_np {
        u8 __reserved1[3];
        u32 fqid;       /* 24-bit */
        u8 __reserved2[56];
} __packed;
struct qm_mcc_alterfq {
        u8 __reserved1[3];
        u32 fqid;       /* 24-bit */
        u8 __reserved2;
        u8 count;       /* number of consecutive FQID */
        u8 __reserved3[10];
        u32 context_b;  /* frame queue context b */
        u8 __reserved4[40];
} __packed;
struct qm_mcc_initcgr {
        u8 __reserved1;
        u16 we_mask;    /* Write Enable Mask */
        struct __qm_mc_cgr cgr; /* CGR fields */
        u8 __reserved2[2];
        u8 cgid;
        u8 __reserved4[32];
} __packed;
struct qm_mcc_cgrtestwrite {
        u8 __reserved1[2];
        u8 i_bcnt_hi:8;/* high 8-bits of 40-bit "Instant" */
        u32 i_bcnt_lo;  /* low 32-bits of 40-bit */
        u8 __reserved2[23];
        u8 cgid;
        u8 __reserved3[32];
} __packed;
struct qm_mcc_querycgr {
        u8 __reserved1[30];
        u8 cgid;
        u8 __reserved2[32];
} __packed;
struct qm_mcc_querycongestion {
        u8 __reserved[63];
} __packed;
struct qm_mcc_querywq {
        u8 __reserved;
        /* select channel if verb != QUERYWQ_DEDICATED */
        union {
                u16 channel_wq; /* ignores wq (3 lsbits) */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 id:13; /* qm_channel */
                        u16 __reserved1:3;
#else
                        u16 __reserved1:3;
                        u16 id:13; /* qm_channel */
#endif
                } __packed channel;
        };
        u8 __reserved2[60];
} __packed;

struct qm_mc_command {
        u8 __dont_write_directly__verb;
        union {
                struct qm_mcc_initfq initfq;
                struct qm_mcc_queryfq queryfq;
                struct qm_mcc_queryfq_np queryfq_np;
                struct qm_mcc_alterfq alterfq;
                struct qm_mcc_initcgr initcgr;
                struct qm_mcc_cgrtestwrite cgrtestwrite;
                struct qm_mcc_querycgr querycgr;
                struct qm_mcc_querycongestion querycongestion;
                struct qm_mcc_querywq querywq;
        };
} __packed;

/* INITFQ-specific flags */
#define QM_INITFQ_WE_MASK               0x01ff  /* 'Write Enable' flags; */
#define QM_INITFQ_WE_OAC                0x0100
#define QM_INITFQ_WE_ORPC               0x0080
#define QM_INITFQ_WE_CGID               0x0040
#define QM_INITFQ_WE_FQCTRL             0x0020
#define QM_INITFQ_WE_DESTWQ             0x0010
#define QM_INITFQ_WE_ICSCRED            0x0008
#define QM_INITFQ_WE_TDTHRESH           0x0004
#define QM_INITFQ_WE_CONTEXTB           0x0002
#define QM_INITFQ_WE_CONTEXTA           0x0001
/* INITCGR/MODIFYCGR-specific flags */
#define QM_CGR_WE_MASK                  0x07ff  /* 'Write Enable Mask'; */
#define QM_CGR_WE_WR_PARM_G             0x0400
#define QM_CGR_WE_WR_PARM_Y             0x0200
#define QM_CGR_WE_WR_PARM_R             0x0100
#define QM_CGR_WE_WR_EN_G               0x0080
#define QM_CGR_WE_WR_EN_Y               0x0040
#define QM_CGR_WE_WR_EN_R               0x0020
#define QM_CGR_WE_CSCN_EN               0x0010
#define QM_CGR_WE_CSCN_TARG             0x0008
#define QM_CGR_WE_CSTD_EN               0x0004
#define QM_CGR_WE_CS_THRES              0x0002
#define QM_CGR_WE_MODE                  0x0001

struct qm_mcr_initfq {
        u8 __reserved1[62];
} __packed;
struct qm_mcr_queryfq {
        u8 __reserved1[8];
        struct qm_fqd fqd;      /* the FQD fields are here */
        u8 __reserved2[30];
} __packed;
struct qm_mcr_queryfq_np {
        u8 __reserved1;
        u8 state;       /* QM_MCR_NP_STATE_*** */
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
        u8 __reserved2;
        u32 fqd_link:24;
        u16 __reserved3:2;
        u16 odp_seq:14;
        u16 __reserved4:2;
        u16 orp_nesn:14;
        u16 __reserved5:1;
        u16 orp_ea_hseq:15;
        u16 __reserved6:1;
        u16 orp_ea_tseq:15;
        u8 __reserved7;
        u32 orp_ea_hptr:24;
        u8 __reserved8;
        u32 orp_ea_tptr:24;
        u8 __reserved9;
        u32 pfdr_hptr:24;
        u8 __reserved10;
        u32 pfdr_tptr:24;
        u8 __reserved11[5];
        u8 __reserved12:7;
        u8 is:1;
        u16 ics_surp;
        u32 byte_cnt;
        u8 __reserved13;
        u32 frm_cnt:24;
        u32 __reserved14;
        u16 ra1_sfdr;   /* QM_MCR_NP_RA1_*** */
        u16 ra2_sfdr;   /* QM_MCR_NP_RA2_*** */
        u16 __reserved15;
        u16 od1_sfdr;   /* QM_MCR_NP_OD1_*** */
        u16 od2_sfdr;   /* QM_MCR_NP_OD2_*** */
        u16 od3_sfdr;   /* QM_MCR_NP_OD3_*** */
#else
        u8 __reserved2;
        u32 fqd_link:24;

        u16 odp_seq:14;
        u16 __reserved3:2;

        u16 orp_nesn:14;
        u16 __reserved4:2;

        u16 orp_ea_hseq:15;
        u16 __reserved5:1;

        u16 orp_ea_tseq:15;
        u16 __reserved6:1;

        u8 __reserved7;
        u32 orp_ea_hptr:24;

        u8 __reserved8;
        u32 orp_ea_tptr:24;

        u8 __reserved9;
        u32 pfdr_hptr:24;

        u8 __reserved10;
        u32 pfdr_tptr:24;

        u8 __reserved11[5];
        u8 is:1;
        u8 __reserved12:7;
        u16 ics_surp;
        u32 byte_cnt;
        u8 __reserved13;
        u32 frm_cnt:24;
        u32 __reserved14;
        u16 ra1_sfdr;   /* QM_MCR_NP_RA1_*** */
        u16 ra2_sfdr;   /* QM_MCR_NP_RA2_*** */
        u16 __reserved15;
        u16 od1_sfdr;   /* QM_MCR_NP_OD1_*** */
        u16 od2_sfdr;   /* QM_MCR_NP_OD2_*** */
        u16 od3_sfdr;   /* QM_MCR_NP_OD3_*** */
#endif
} __packed;

struct qm_mcr_alterfq {
        u8 fqs;         /* Frame Queue Status */
        u8 __reserved1[61];
} __packed;
struct qm_mcr_initcgr {
        u8 __reserved1[62];
} __packed;
struct qm_mcr_cgrtestwrite {
        u16 __reserved1;
        struct __qm_mc_cgr cgr; /* CGR fields */
        u8 __reserved2[3];
        u32 __reserved3:24;
        u32 i_bcnt_hi:8;/* high 8-bits of 40-bit "Instant" */
        u32 i_bcnt_lo;  /* low 32-bits of 40-bit */
        u32 __reserved4:24;
        u32 a_bcnt_hi:8;/* high 8-bits of 40-bit "Average" */
        u32 a_bcnt_lo;  /* low 32-bits of 40-bit */
        u16 lgt;        /* Last Group Tick */
        u16 wr_prob_g;
        u16 wr_prob_y;
        u16 wr_prob_r;
        u8 __reserved5[8];
} __packed;
struct qm_mcr_querycgr {
        u16 __reserved1;
        struct __qm_mc_cgr cgr; /* CGR fields */
        u8 __reserved2[3];
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u32 __reserved3:24;
                        u32 i_bcnt_hi:8;/* high 8-bits of 40-bit "Instant" */
                        u32 i_bcnt_lo;  /* low 32-bits of 40-bit */
#else
                        u32 i_bcnt_lo;  /* low 32-bits of 40-bit */
                        u32 i_bcnt_hi:8;/* high 8-bits of 40-bit "Instant" */
                        u32 __reserved3:24;
#endif
                };
                u64 i_bcnt;
        };
        union {
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u32 __reserved4:24;
                        u32 a_bcnt_hi:8;/* high 8-bits of 40-bit "Average" */
                        u32 a_bcnt_lo;  /* low 32-bits of 40-bit */
#else
                        u32 a_bcnt_lo;  /* low 32-bits of 40-bit */
                        u32 a_bcnt_hi:8;/* high 8-bits of 40-bit "Average" */
                        u32 __reserved4:24;
#endif
                };
                u64 a_bcnt;
        };
        union {
                u32 cscn_targ_swp[4];
                u8 __reserved5[16];
        };
} __packed;

struct __qm_mcr_querycongestion {
        u32 state[8];
};

struct qm_mcr_querycongestion {
        u8 __reserved[30];
        /* Access this struct using QM_MCR_QUERYCONGESTION() */
        struct __qm_mcr_querycongestion state;
} __packed;
struct qm_mcr_querywq {
        union {
                u16 channel_wq; /* ignores wq (3 lsbits) */
                struct {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
                        u16 id:13; /* qm_channel */
                        u16 __reserved:3;
#else
                        u16 __reserved:3;
                        u16 id:13; /* qm_channel */
#endif
                } __packed channel;
        };
        u8 __reserved[28];
        u32 wq_len[8];
} __packed;

struct qm_mc_result {
        u8 verb;
        u8 result;
        union {
                struct qm_mcr_initfq initfq;
                struct qm_mcr_queryfq queryfq;
                struct qm_mcr_queryfq_np queryfq_np;
                struct qm_mcr_alterfq alterfq;
                struct qm_mcr_initcgr initcgr;
                struct qm_mcr_cgrtestwrite cgrtestwrite;
                struct qm_mcr_querycgr querycgr;
                struct qm_mcr_querycongestion querycongestion;
                struct qm_mcr_querywq querywq;
        };
} __packed;

#define QM_MCR_VERB_RRID                0x80
#define QM_MCR_VERB_MASK                QM_MCC_VERB_MASK
#define QM_MCR_VERB_INITFQ_PARKED       QM_MCC_VERB_INITFQ_PARKED
#define QM_MCR_VERB_INITFQ_SCHED        QM_MCC_VERB_INITFQ_SCHED
#define QM_MCR_VERB_QUERYFQ             QM_MCC_VERB_QUERYFQ
#define QM_MCR_VERB_QUERYFQ_NP          QM_MCC_VERB_QUERYFQ_NP
#define QM_MCR_VERB_QUERYWQ             QM_MCC_VERB_QUERYWQ
#define QM_MCR_VERB_QUERYWQ_DEDICATED   QM_MCC_VERB_QUERYWQ_DEDICATED
#define QM_MCR_VERB_ALTER_SCHED         QM_MCC_VERB_ALTER_SCHED
#define QM_MCR_VERB_ALTER_FE            QM_MCC_VERB_ALTER_FE
#define QM_MCR_VERB_ALTER_RETIRE        QM_MCC_VERB_ALTER_RETIRE
#define QM_MCR_VERB_ALTER_OOS           QM_MCC_VERB_ALTER_OOS
#define QM_MCR_RESULT_NULL              0x00
#define QM_MCR_RESULT_OK                0xf0
#define QM_MCR_RESULT_ERR_FQID          0xf1
#define QM_MCR_RESULT_ERR_FQSTATE       0xf2
#define QM_MCR_RESULT_ERR_NOTEMPTY      0xf3    /* OOS fails if FQ is !empty */
#define QM_MCR_RESULT_ERR_BADCHANNEL    0xf4
#define QM_MCR_RESULT_PENDING           0xf8
#define QM_MCR_RESULT_ERR_BADCOMMAND    0xff
#define QM_MCR_NP_STATE_FE              0x10
#define QM_MCR_NP_STATE_R               0x08
#define QM_MCR_NP_STATE_MASK            0x07    /* Reads FQD::STATE; */
#define QM_MCR_NP_STATE_OOS             0x00
#define QM_MCR_NP_STATE_RETIRED         0x01
#define QM_MCR_NP_STATE_TEN_SCHED       0x02
#define QM_MCR_NP_STATE_TRU_SCHED       0x03
#define QM_MCR_NP_STATE_PARKED          0x04
#define QM_MCR_NP_STATE_ACTIVE          0x05
#define QM_MCR_NP_PTR_MASK              0x07ff  /* for RA[12] & OD[123] */
#define QM_MCR_NP_RA1_NRA(v)            (((v) >> 14) & 0x3)     /* FQD::NRA */
#define QM_MCR_NP_RA2_IT(v)             (((v) >> 14) & 0x1)     /* FQD::IT */
#define QM_MCR_NP_OD1_NOD(v)            (((v) >> 14) & 0x3)     /* FQD::NOD */
#define QM_MCR_NP_OD3_NPC(v)            (((v) >> 14) & 0x3)     /* FQD::NPC */
#define QM_MCR_FQS_ORLPRESENT           0x02    /* ORL fragments to come */
#define QM_MCR_FQS_NOTEMPTY             0x01    /* FQ has enqueued frames */
/* This extracts the state for congestion group 'n' from a query response.
 * Eg.
 *   u8 cgr = [...];
 *   struct qm_mc_result *res = [...];
 *   printf("congestion group %d congestion state: %d\n", cgr,
 *       QM_MCR_QUERYCONGESTION(&res->querycongestion.state, cgr));
 */
#define __CGR_WORD(num)         (num >> 5)
#define __CGR_SHIFT(num)        (num & 0x1f)
#define __CGR_NUM               (sizeof(struct __qm_mcr_querycongestion) << 3)
static inline int QM_MCR_QUERYCONGESTION(struct __qm_mcr_querycongestion *p,
                                         u8 cgr)
{
        return p->state[__CGR_WORD(cgr)] & (0x80000000 >> __CGR_SHIFT(cgr));
}

        /* Portal and Frame Queues */
/* Represents a managed portal */
struct qman_portal;

/*
 * This object type represents QMan frame queue descriptors (FQD), it is
 * cacheline-aligned, and initialised by qman_create_fq(). The structure is
 * defined further down.
 */
struct qman_fq;

/*
 * This object type represents a QMan congestion group, it is defined further
 * down.
 */
struct qman_cgr;

/*
 * This enum, and the callback type that returns it, are used when handling
 * dequeued frames via DQRR. Note that for "null" callbacks registered with the
 * portal object (for handling dequeues that do not demux because context_b is
 * NULL), the return value *MUST* be qman_cb_dqrr_consume.
 */
enum qman_cb_dqrr_result {
        /* DQRR entry can be consumed */
        qman_cb_dqrr_consume,
        /* Like _consume, but requests parking - FQ must be held-active */
        qman_cb_dqrr_park,
        /* Does not consume, for DCA mode only. This allows out-of-order
         * consumes by explicit calls to qman_dca() and/or the use of implicit
         * DCA via EQCR entries.
         */
        qman_cb_dqrr_defer,
        /*
         * Stop processing without consuming this ring entry. Exits the current
         * qman_p_poll_dqrr() or interrupt-handling, as appropriate. If within
         * an interrupt handler, the callback would typically call
         * qman_irqsource_remove(QM_PIRQ_DQRI) before returning this value,
         * otherwise the interrupt will reassert immediately.
         */
        qman_cb_dqrr_stop,
        /* Like qman_cb_dqrr_stop, but consumes the current entry. */
        qman_cb_dqrr_consume_stop
};

typedef enum qman_cb_dqrr_result (*qman_cb_dqrr)(struct qman_portal *qm,
                                        struct qman_fq *fq,
                                        const struct qm_dqrr_entry *dqrr);

/*
 * This callback type is used when handling ERNs, FQRNs and FQRLs via MR. They
 * are always consumed after the callback returns.
 */
typedef void (*qman_cb_mr)(struct qman_portal *qm, struct qman_fq *fq,
                                const struct qm_mr_entry *msg);

/* This callback type is used when handling DCP ERNs */
typedef void (*qman_cb_dc_ern)(struct qman_portal *qm,
                                const struct qm_mr_entry *msg);
/*
 * s/w-visible states. Ie. tentatively scheduled + truly scheduled + active +
 * held-active + held-suspended are just "sched". Things like "retired" will not
 * be assumed until it is complete (ie. QMAN_FQ_STATE_CHANGING is set until
 * then, to indicate it's completing and to gate attempts to retry the retire
 * command). Note, park commands do not set QMAN_FQ_STATE_CHANGING because it's
 * technically impossible in the case of enqueue DCAs (which refer to DQRR ring
 * index rather than the FQ that ring entry corresponds to), so repeated park
 * commands are allowed (if you're silly enough to try) but won't change FQ
 * state, and the resulting park notifications move FQs from "sched" to
 * "parked".
 */
enum qman_fq_state {
        qman_fq_state_oos,
        qman_fq_state_parked,
        qman_fq_state_sched,
        qman_fq_state_retired
};


/*
 * Frame queue objects (struct qman_fq) are stored within memory passed to
 * qman_create_fq(), as this allows stashing of caller-provided demux callback
 * pointers at no extra cost to stashing of (driver-internal) FQ state. If the
 * caller wishes to add per-FQ state and have it benefit from dequeue-stashing,
 * they should;
 *
 * (a) extend the qman_fq structure with their state; eg.
 *
 *     // myfq is allocated and driver_fq callbacks filled in;
 *     struct my_fq {
 *         struct qman_fq base;
 *         int an_extra_field;
 *         [ ... add other fields to be associated with each FQ ...]
 *     } *myfq = some_my_fq_allocator();
 *     struct qman_fq *fq = qman_create_fq(fqid, flags, &myfq->base);
 *
 *     // in a dequeue callback, access extra fields from 'fq' via a cast;
 *     struct my_fq *myfq = (struct my_fq *)fq;
 *     do_something_with(myfq->an_extra_field);
 *     [...]
 *
 * (b) when and if configuring the FQ for context stashing, specify how ever
 *     many cachelines are required to stash 'struct my_fq', to accelerate not
 *     only the QMan driver but the callback as well.
 */

struct qman_fq_cb {
        qman_cb_dqrr dqrr;      /* for dequeued frames */
        qman_cb_mr ern;         /* for s/w ERNs */
        qman_cb_mr fqs;         /* frame-queue state changes*/
};

struct qman_fq {
        /* Caller of qman_create_fq() provides these demux callbacks */
        struct qman_fq_cb cb;
        /*
         * These are internal to the driver, don't touch. In particular, they
         * may change, be removed, or extended (so you shouldn't rely on
         * sizeof(qman_fq) being a constant).
         */
        spinlock_t fqlock;
        u32 fqid;
        /* DPDK Interface */
        void *dpaa_intf;

        volatile unsigned long flags;
        enum qman_fq_state state;
        int cgr_groupid;
        struct rb_node node;
};

/*
 * This callback type is used when handling congestion group entry/exit.
 * 'congested' is non-zero on congestion-entry, and zero on congestion-exit.
 */
typedef void (*qman_cb_cgr)(struct qman_portal *qm,
                            struct qman_cgr *cgr, int congested);

struct qman_cgr {
        /* Set these prior to qman_create_cgr() */
        u32 cgrid; /* 0..255, but u32 to allow specials like -1, 256, etc.*/
        qman_cb_cgr cb;
        /* These are private to the driver */
        u16 chan; /* portal channel this object is created on */
        struct list_head node;
};

/* Flags to qman_create_fq() */
#define QMAN_FQ_FLAG_NO_ENQUEUE      0x00000001 /* can't enqueue */
#define QMAN_FQ_FLAG_NO_MODIFY       0x00000002 /* can only enqueue */
#define QMAN_FQ_FLAG_TO_DCPORTAL     0x00000004 /* consumed by CAAM/PME/Fman */
#define QMAN_FQ_FLAG_LOCKED          0x00000008 /* multi-core locking */
#define QMAN_FQ_FLAG_AS_IS           0x00000010 /* query h/w state */
#define QMAN_FQ_FLAG_DYNAMIC_FQID    0x00000020 /* (de)allocate fqid */

/* Flags to qman_destroy_fq() */
#define QMAN_FQ_DESTROY_PARKED       0x00000001 /* FQ can be parked or OOS */

/* Flags from qman_fq_state() */
#define QMAN_FQ_STATE_CHANGING       0x80000000 /* 'state' is changing */
#define QMAN_FQ_STATE_NE             0x40000000 /* retired FQ isn't empty */
#define QMAN_FQ_STATE_ORL            0x20000000 /* retired FQ has ORL */
#define QMAN_FQ_STATE_BLOCKOOS       0xe0000000 /* if any are set, no OOS */
#define QMAN_FQ_STATE_CGR_EN         0x10000000 /* CGR enabled */
#define QMAN_FQ_STATE_VDQCR          0x08000000 /* being volatile dequeued */

/* Flags to qman_init_fq() */
#define QMAN_INITFQ_FLAG_SCHED       0x00000001 /* schedule rather than park */
#define QMAN_INITFQ_FLAG_LOCAL       0x00000004 /* set dest portal */

/* Flags to qman_enqueue(). NB, the strange numbering is to align with hardware,
 * bit-wise. (NB: the PME API is sensitive to these precise numberings too, so
 * any change here should be audited in PME.)
 */
#define QMAN_ENQUEUE_FLAG_WATCH_CGR  0x00080000 /* watch congestion state */
#define QMAN_ENQUEUE_FLAG_DCA        0x00008000 /* perform enqueue-DCA */
#define QMAN_ENQUEUE_FLAG_DCA_PARK   0x00004000 /* If DCA, requests park */
#define QMAN_ENQUEUE_FLAG_DCA_PTR(p)            /* If DCA, p is DQRR entry */ \
                (((u32)(p) << 2) & 0x00000f00)
#define QMAN_ENQUEUE_FLAG_C_GREEN    0x00000000 /* choose one C_*** flag */
#define QMAN_ENQUEUE_FLAG_C_YELLOW   0x00000008
#define QMAN_ENQUEUE_FLAG_C_RED      0x00000010
#define QMAN_ENQUEUE_FLAG_C_OVERRIDE 0x00000018
/* For the ORP-specific qman_enqueue_orp() variant;
 * - this flag indicates "Not Last In Sequence", ie. all but the final fragment
 *   of a frame.
 */
#define QMAN_ENQUEUE_FLAG_NLIS       0x01000000
/* - this flag performs no enqueue but fills in an ORP sequence number that
 *   would otherwise block it (eg. if a frame has been dropped).
 */
#define QMAN_ENQUEUE_FLAG_HOLE       0x02000000
/* - this flag performs no enqueue but advances NESN to the given sequence
 *   number.
 */
#define QMAN_ENQUEUE_FLAG_NESN       0x04000000

/* Flags to qman_modify_cgr() */
#define QMAN_CGR_FLAG_USE_INIT       0x00000001
#define QMAN_CGR_MODE_FRAME          0x00000001

/**
 * qman_get_portal_index - get portal configuration index
 */
int qman_get_portal_index(void);

/**
 * qman_affine_channel - return the channel ID of an portal
 * @cpu: the cpu whose affine portal is the subject of the query
 *
 * If @cpu is -1, the affine portal for the current CPU will be used. It is a
 * bug to call this function for any value of @cpu (other than -1) that is not a
 * member of the cpu mask.
 */
u16 qman_affine_channel(int cpu);

/**
 * qman_set_vdq - Issue a volatile dequeue command
 * @fq: Frame Queue on which the volatile dequeue command is issued
 * @num: Number of Frames requested for volatile dequeue
 *
 * This function will issue a volatile dequeue command to the QMAN.
 */
int qman_set_vdq(struct qman_fq *fq, u16 num);

/**
 * qman_dequeue - Get the DQRR entry after volatile dequeue command
 * @fq: Frame Queue on which the volatile dequeue command is issued
 *
 * This function will return the DQRR entry after a volatile dequeue command
 * is issued. It will keep returning NULL until there is no packet available on
 * the DQRR.
 */
struct qm_dqrr_entry *qman_dequeue(struct qman_fq *fq);

/**
 * qman_dqrr_consume - Consume the DQRR entriy after volatile dequeue
 * @fq: Frame Queue on which the volatile dequeue command is issued
 * @dq: DQRR entry to consume. This is the one which is provided by the
 *    'qbman_dequeue' command.
 *
 * This will consume the DQRR enrey and make it available for next volatile
 * dequeue.
 */
void qman_dqrr_consume(struct qman_fq *fq,
                       struct qm_dqrr_entry *dq);

/**
 * qman_poll_dqrr - process DQRR (fast-path) entries
 * @limit: the maximum number of DQRR entries to process
 *
 * Use of this function requires that DQRR processing not be interrupt-driven.
 * Ie. the value returned by qman_irqsource_get() should not include
 * QM_PIRQ_DQRI. If the current CPU is sharing a portal hosted on another CPU,
 * this function will return -EINVAL, otherwise the return value is >=0 and
 * represents the number of DQRR entries processed.
 */
int qman_poll_dqrr(unsigned int limit);

/**
 * qman_poll
 *
 * Dispatcher logic on a cpu can use this to trigger any maintenance of the
 * affine portal. There are two classes of portal processing in question;
 * fast-path (which involves demuxing dequeue ring (DQRR) entries and tracking
 * enqueue ring (EQCR) consumption), and slow-path (which involves EQCR
 * thresholds, congestion state changes, etc). This function does whatever
 * processing is not triggered by interrupts.
 *
 * Note, if DQRR and some slow-path processing are poll-driven (rather than
 * interrupt-driven) then this function uses a heuristic to determine how often
 * to run slow-path processing - as slow-path processing introduces at least a
 * minimum latency each time it is run, whereas fast-path (DQRR) processing is
 * close to zero-cost if there is no work to be done.
 */
void qman_poll(void);

/**
 * qman_stop_dequeues - Stop h/w dequeuing to the s/w portal
 *
 * Disables DQRR processing of the portal. This is reference-counted, so
 * qman_start_dequeues() must be called as many times as qman_stop_dequeues() to
 * truly re-enable dequeuing.
 */
void qman_stop_dequeues(void);

/**
 * qman_start_dequeues - (Re)start h/w dequeuing to the s/w portal
 *
 * Enables DQRR processing of the portal. This is reference-counted, so
 * qman_start_dequeues() must be called as many times as qman_stop_dequeues() to
 * truly re-enable dequeuing.
 */
void qman_start_dequeues(void);

/**
 * qman_static_dequeue_add - Add pool channels to the portal SDQCR
 * @pools: bit-mask of pool channels, using QM_SDQCR_CHANNELS_POOL(n)
 *
 * Adds a set of pool channels to the portal's static dequeue command register
 * (SDQCR). The requested pools are limited to those the portal has dequeue
 * access to.
 */
void qman_static_dequeue_add(u32 pools);

/**
 * qman_static_dequeue_del - Remove pool channels from the portal SDQCR
 * @pools: bit-mask of pool channels, using QM_SDQCR_CHANNELS_POOL(n)
 *
 * Removes a set of pool channels from the portal's static dequeue command
 * register (SDQCR). The requested pools are limited to those the portal has
 * dequeue access to.
 */
void qman_static_dequeue_del(u32 pools);

/**
 * qman_static_dequeue_get - return the portal's current SDQCR
 *
 * Returns the portal's current static dequeue command register (SDQCR). The
 * entire register is returned, so if only the currently-enabled pool channels
 * are desired, mask the return value with QM_SDQCR_CHANNELS_POOL_MASK.
 */
u32 qman_static_dequeue_get(void);

/**
 * qman_dca - Perform a Discrete Consumption Acknowledgment
 * @dq: the DQRR entry to be consumed
 * @park_request: indicates whether the held-active @fq should be parked
 *
 * Only allowed in DCA-mode portals, for DQRR entries whose handler callback had
 * previously returned 'qman_cb_dqrr_defer'. NB, as with the other APIs, this
 * does not take a 'portal' argument but implies the core affine portal from the
 * cpu that is currently executing the function. For reasons of locking, this
 * function must be called from the same CPU as that which processed the DQRR
 * entry in the first place.
 */
void qman_dca(struct qm_dqrr_entry *dq, int park_request);

/**
 * qman_eqcr_is_empty - Determine if portal's EQCR is empty
 *
 * For use in situations where a cpu-affine caller needs to determine when all
 * enqueues for the local portal have been processed by Qman but can't use the
 * QMAN_ENQUEUE_FLAG_WAIT_SYNC flag to do this from the final qman_enqueue().
 * The function forces tracking of EQCR consumption (which normally doesn't
 * happen until enqueue processing needs to find space to put new enqueue
 * commands), and returns zero if the ring still has unprocessed entries,
 * non-zero if it is empty.
 */
int qman_eqcr_is_empty(void);

/**
 * qman_set_dc_ern - Set the handler for DCP enqueue rejection notifications
 * @handler: callback for processing DCP ERNs
 * @affine: whether this handler is specific to the locally affine portal
 *
 * If a hardware block's interface to Qman (ie. its direct-connect portal, or
 * DCP) is configured not to receive enqueue rejections, then any enqueues
 * through that DCP that are rejected will be sent to a given software portal.
 * If @affine is non-zero, then this handler will only be used for DCP ERNs
 * received on the portal affine to the current CPU. If multiple CPUs share a
 * portal and they all call this function, they will be setting the handler for
 * the same portal! If @affine is zero, then this handler will be global to all
 * portals handled by this instance of the driver. Only those portals that do
 * not have their own affine handler will use the global handler.
 */
void qman_set_dc_ern(qman_cb_dc_ern handler, int affine);

        /* FQ management */
        /* ------------- */
/**
 * qman_create_fq - Allocates a FQ
 * @fqid: the index of the FQD to encapsulate, must be "Out of Service"
 * @flags: bit-mask of QMAN_FQ_FLAG_*** options
 * @fq: memory for storing the 'fq', with callbacks filled in
 *
 * Creates a frame queue object for the given @fqid, unless the
 * QMAN_FQ_FLAG_DYNAMIC_FQID flag is set in @flags, in which case a FQID is
 * dynamically allocated (or the function fails if none are available). Once
 * created, the caller should not touch the memory at 'fq' except as extended to
 * adjacent memory for user-defined fields (see the definition of "struct
 * qman_fq" for more info). NO_MODIFY is only intended for enqueuing to
 * pre-existing frame-queues that aren't to be otherwise interfered with, it
 * prevents all other modifications to the frame queue. The TO_DCPORTAL flag
 * causes the driver to honour any contextB modifications requested in the
 * qm_init_fq() API, as this indicates the frame queue will be consumed by a
 * direct-connect portal (PME, CAAM, or Fman). When frame queues are consumed by
 * software portals, the contextB field is controlled by the driver and can't be
 * modified by the caller. If the AS_IS flag is specified, management commands
 * will be used on portal @p to query state for frame queue @fqid and construct
 * a frame queue object based on that, rather than assuming/requiring that it be
 * Out of Service.
 */
int qman_create_fq(u32 fqid, u32 flags, struct qman_fq *fq);

/**
 * qman_destroy_fq - Deallocates a FQ
 * @fq: the frame queue object to release
 * @flags: bit-mask of QMAN_FQ_FREE_*** options
 *
 * The memory for this frame queue object ('fq' provided in qman_create_fq()) is
 * not deallocated but the caller regains ownership, to do with as desired. The
 * FQ must be in the 'out-of-service' state unless the QMAN_FQ_FREE_PARKED flag
 * is specified, in which case it may also be in the 'parked' state.
 */
void qman_destroy_fq(struct qman_fq *fq, u32 flags);

/**
 * qman_fq_fqid - Queries the frame queue ID of a FQ object
 * @fq: the frame queue object to query
 */
u32 qman_fq_fqid(struct qman_fq *fq);

/**
 * qman_fq_state - Queries the state of a FQ object
 * @fq: the frame queue object to query
 * @state: pointer to state enum to return the FQ scheduling state
 * @flags: pointer to state flags to receive QMAN_FQ_STATE_*** bitmask
 *
 * Queries the state of the FQ object, without performing any h/w commands.
 * This captures the state, as seen by the driver, at the time the function
 * executes.
 */
void qman_fq_state(struct qman_fq *fq, enum qman_fq_state *state, u32 *flags);

/**
 * qman_init_fq - Initialises FQ fields, leaves the FQ "parked" or "scheduled"
 * @fq: the frame queue object to modify, must be 'parked' or new.
 * @flags: bit-mask of QMAN_INITFQ_FLAG_*** options
 * @opts: the FQ-modification settings, as defined in the low-level API
 *
 * The @opts parameter comes from the low-level portal API. Select
 * QMAN_INITFQ_FLAG_SCHED in @flags to cause the frame queue to be scheduled
 * rather than parked. NB, @opts can be NULL.
 *
 * Note that some fields and options within @opts may be ignored or overwritten
 * by the driver;
 * 1. the 'count' and 'fqid' fields are always ignored (this operation only
 * affects one frame queue: @fq).
 * 2. the QM_INITFQ_WE_CONTEXTB option of the 'we_mask' field and the associated
 * 'fqd' structure's 'context_b' field are sometimes overwritten;
 *   - if @fq was not created with QMAN_FQ_FLAG_TO_DCPORTAL, then context_b is
 *     initialised to a value used by the driver for demux.
 *   - if context_b is initialised for demux, so is context_a in case stashing
 *     is requested (see item 4).
 * (So caller control of context_b is only possible for TO_DCPORTAL frame queue
 * objects.)
 * 3. if @flags contains QMAN_INITFQ_FLAG_LOCAL, the 'fqd' structure's
 * 'dest::channel' field will be overwritten to match the portal used to issue
 * the command. If the WE_DESTWQ write-enable bit had already been set by the
 * caller, the channel workqueue will be left as-is, otherwise the write-enable
 * bit is set and the workqueue is set to a default of 4. If the "LOCAL" flag
 * isn't set, the destination channel/workqueue fields and the write-enable bit
 * are left as-is.
 * 4. if the driver overwrites context_a/b for demux, then if
 * QM_INITFQ_WE_CONTEXTA is set, the driver will only overwrite
 * context_a.address fields and will leave the stashing fields provided by the
 * user alone, otherwise it will zero out the context_a.stashing fields.
 */
int qman_init_fq(struct qman_fq *fq, u32 flags, struct qm_mcc_initfq *opts);

/**
 * qman_schedule_fq - Schedules a FQ
 * @fq: the frame queue object to schedule, must be 'parked'
 *
 * Schedules the frame queue, which must be Parked, which takes it to
 * Tentatively-Scheduled or Truly-Scheduled depending on its fill-level.
 */
int qman_schedule_fq(struct qman_fq *fq);

/**
 * qman_retire_fq - Retires a FQ
 * @fq: the frame queue object to retire
 * @flags: FQ flags (as per qman_fq_state) if retirement completes immediately
 *
 * Retires the frame queue. This returns zero if it succeeds immediately, +1 if
 * the retirement was started asynchronously, otherwise it returns negative for
 * failure. When this function returns zero, @flags is set to indicate whether
 * the retired FQ is empty and/or whether it has any ORL fragments (to show up
 * as ERNs). Otherwise the corresponding flags will be known when a subsequent
 * FQRN message shows up on the portal's message ring.
 *
 * NB, if the retirement is asynchronous (the FQ was in the Truly Scheduled or
 * Active state), the completion will be via the message ring as a FQRN - but
 * the corresponding callback may occur before this function returns!! Ie. the
 * caller should be prepared to accept the callback as the function is called,
 * not only once it has returned.
 */
int qman_retire_fq(struct qman_fq *fq, u32 *flags);

/**
 * qman_oos_fq - Puts a FQ "out of service"
 * @fq: the frame queue object to be put out-of-service, must be 'retired'
 *
 * The frame queue must be retired and empty, and if any order restoration list
 * was released as ERNs at the time of retirement, they must all be consumed.
 */
int qman_oos_fq(struct qman_fq *fq);

/**
 * qman_fq_flow_control - Set the XON/XOFF state of a FQ
 * @fq: the frame queue object to be set to XON/XOFF state, must not be 'oos',
 * or 'retired' or 'parked' state
 * @xon: boolean to set fq in XON or XOFF state
 *
 * The frame should be in Tentatively Scheduled state or Truly Schedule sate,
 * otherwise the IFSI interrupt will be asserted.
 */
int qman_fq_flow_control(struct qman_fq *fq, int xon);

/**
 * qman_query_fq - Queries FQD fields (via h/w query command)
 * @fq: the frame queue object to be queried
 * @fqd: storage for the queried FQD fields
 */
int qman_query_fq(struct qman_fq *fq, struct qm_fqd *fqd);

/**
 * qman_query_fq_has_pkts - Queries non-programmable FQD fields and returns '1'
 * if packets are in the frame queue. If there are no packets on frame
 * queue '0' is returned.
 * @fq: the frame queue object to be queried
 */
int qman_query_fq_has_pkts(struct qman_fq *fq);

/**
 * qman_query_fq_np - Queries non-programmable FQD fields
 * @fq: the frame queue object to be queried
 * @np: storage for the queried FQD fields
 */
int qman_query_fq_np(struct qman_fq *fq, struct qm_mcr_queryfq_np *np);

/**
 * qman_query_wq - Queries work queue lengths
 * @query_dedicated: If non-zero, query length of WQs in the channel dedicated
 *              to this software portal. Otherwise, query length of WQs in a
 *              channel  specified in wq.
 * @wq: storage for the queried WQs lengths. Also specified the channel to
 *      to query if query_dedicated is zero.
 */
int qman_query_wq(u8 query_dedicated, struct qm_mcr_querywq *wq);

/**
 * qman_volatile_dequeue - Issue a volatile dequeue command
 * @fq: the frame queue object to dequeue from
 * @flags: a bit-mask of QMAN_VOLATILE_FLAG_*** options
 * @vdqcr: bit mask of QM_VDQCR_*** options, as per qm_dqrr_vdqcr_set()
 *
 * Attempts to lock access to the portal's VDQCR volatile dequeue functionality.
 * The function will block and sleep if QMAN_VOLATILE_FLAG_WAIT is specified and
 * the VDQCR is already in use, otherwise returns non-zero for failure. If
 * QMAN_VOLATILE_FLAG_FINISH is specified, the function will only return once
 * the VDQCR command has finished executing (ie. once the callback for the last
 * DQRR entry resulting from the VDQCR command has been called). If not using
 * the FINISH flag, completion can be determined either by detecting the
 * presence of the QM_DQRR_STAT_UNSCHEDULED and QM_DQRR_STAT_DQCR_EXPIRED bits
 * in the "stat" field of the "struct qm_dqrr_entry" passed to the FQ's dequeue
 * callback, or by waiting for the QMAN_FQ_STATE_VDQCR bit to disappear from the
 * "flags" retrieved from qman_fq_state().
 */
int qman_volatile_dequeue(struct qman_fq *fq, u32 flags, u32 vdqcr);

/**
 * qman_enqueue - Enqueue a frame to a frame queue
 * @fq: the frame queue object to enqueue to
 * @fd: a descriptor of the frame to be enqueued
 * @flags: bit-mask of QMAN_ENQUEUE_FLAG_*** options
 *
 * Fills an entry in the EQCR of portal @qm to enqueue the frame described by
 * @fd. The descriptor details are copied from @fd to the EQCR entry, the 'pid'
 * field is ignored. The return value is non-zero on error, such as ring full
 * (and FLAG_WAIT not specified), congestion avoidance (FLAG_WATCH_CGR
 * specified), etc. If the ring is full and FLAG_WAIT is specified, this
 * function will block. If FLAG_INTERRUPT is set, the EQCI bit of the portal
 * interrupt will assert when Qman consumes the EQCR entry (subject to "status
 * disable", "enable", and "inhibit" registers). If FLAG_DCA is set, Qman will
 * perform an implied "discrete consumption acknowledgment" on the dequeue
 * ring's (DQRR) entry, at the ring index specified by the FLAG_DCA_IDX(x)
 * macro. (As an alternative to issuing explicit DCA actions on DQRR entries,
 * this implicit DCA can delay the release of a "held active" frame queue
 * corresponding to a DQRR entry until Qman consumes the EQCR entry - providing
 * order-preservation semantics in packet-forwarding scenarios.) If FLAG_DCA is
 * set, then FLAG_DCA_PARK can also be set to imply that the DQRR consumption
 * acknowledgment should "park request" the "held active" frame queue. Ie.
 * when the portal eventually releases that frame queue, it will be left in the
 * Parked state rather than Tentatively Scheduled or Truly Scheduled. If the
 * portal is watching congestion groups, the QMAN_ENQUEUE_FLAG_WATCH_CGR flag
 * is requested, and the FQ is a member of a congestion group, then this
 * function returns -EAGAIN if the congestion group is currently congested.
 * Note, this does not eliminate ERNs, as the async interface means we can be
 * sending enqueue commands to an un-congested FQ that becomes congested before
 * the enqueue commands are processed, but it does minimise needless thrashing
 * of an already busy hardware resource by throttling many of the to-be-dropped
 * enqueues "at the source".
 */
int qman_enqueue(struct qman_fq *fq, const struct qm_fd *fd, u32 flags);

int qman_enqueue_multi(struct qman_fq *fq,
                       const struct qm_fd *fd,
                int frames_to_send);

typedef int (*qman_cb_precommit) (void *arg);

/**
 * qman_enqueue_orp - Enqueue a frame to a frame queue using an ORP
 * @fq: the frame queue object to enqueue to
 * @fd: a descriptor of the frame to be enqueued
 * @flags: bit-mask of QMAN_ENQUEUE_FLAG_*** options
 * @orp: the frame queue object used as an order restoration point.
 * @orp_seqnum: the sequence number of this frame in the order restoration path
 *
 * Similar to qman_enqueue(), but with the addition of an Order Restoration
 * Point (@orp) and corresponding sequence number (@orp_seqnum) for this
 * enqueue operation to employ order restoration. Each frame queue object acts
 * as an Order Definition Point (ODP) by providing each frame dequeued from it
 * with an incrementing sequence number, this value is generally ignored unless
 * that sequence of dequeued frames will need order restoration later. Each
 * frame queue object also encapsulates an Order Restoration Point (ORP), which
 * is a re-assembly context for re-ordering frames relative to their sequence
 * numbers as they are enqueued. The ORP does not have to be within the frame
 * queue that receives the enqueued frame, in fact it is usually the frame
 * queue from which the frames were originally dequeued. For the purposes of
 * order restoration, multiple frames (or "fragments") can be enqueued for a
 * single sequence number by setting the QMAN_ENQUEUE_FLAG_NLIS flag for all
 * enqueues except the final fragment of a given sequence number. Ordering
 * between sequence numbers is guaranteed, even if fragments of different
 * sequence numbers are interlaced with one another. Fragments of the same
 * sequence number will retain the order in which they are enqueued. If no
 * enqueue is to performed, QMAN_ENQUEUE_FLAG_HOLE indicates that the given
 * sequence number is to be "skipped" by the ORP logic (eg. if a frame has been
 * dropped from a sequence), or QMAN_ENQUEUE_FLAG_NESN indicates that the given
 * sequence number should become the ORP's "Next Expected Sequence Number".
 *
 * Side note: a frame queue object can be used purely as an ORP, without
 * carrying any frames at all. Care should be taken not to deallocate a frame
 * queue object that is being actively used as an ORP, as a future allocation
 * of the frame queue object may start using the internal ORP before the
 * previous use has finished.
 */
int qman_enqueue_orp(struct qman_fq *fq, const struct qm_fd *fd, u32 flags,
                     struct qman_fq *orp, u16 orp_seqnum);

/**
 * qman_alloc_fqid_range - Allocate a contiguous range of FQIDs
 * @result: is set by the API to the base FQID of the allocated range
 * @count: the number of FQIDs required
 * @align: required alignment of the allocated range
 * @partial: non-zero if the API can return fewer than @count FQIDs
 *
 * Returns the number of frame queues allocated, or a negative error code. If
 * @partial is non zero, the allocation request may return a smaller range of
 * FQs than requested (though alignment will be as requested). If @partial is
 * zero, the return value will either be 'count' or negative.
 */
int qman_alloc_fqid_range(u32 *result, u32 count, u32 align, int partial);
static inline int qman_alloc_fqid(u32 *result)
{
        int ret = qman_alloc_fqid_range(result, 1, 0, 0);

        return (ret > 0) ? 0 : ret;
}

/**
 * qman_release_fqid_range - Release the specified range of frame queue IDs
 * @fqid: the base FQID of the range to deallocate
 * @count: the number of FQIDs in the range
 *
 * This function can also be used to seed the allocator with ranges of FQIDs
 * that it can subsequently allocate from.
 */
void qman_release_fqid_range(u32 fqid, unsigned int count);
static inline void qman_release_fqid(u32 fqid)
{
        qman_release_fqid_range(fqid, 1);
}

void qman_seed_fqid_range(u32 fqid, unsigned int count);

int qman_shutdown_fq(u32 fqid);

/**
 * qman_reserve_fqid_range - Reserve the specified range of frame queue IDs
 * @fqid: the base FQID of the range to deallocate
 * @count: the number of FQIDs in the range
 */
int qman_reserve_fqid_range(u32 fqid, unsigned int count);
static inline int qman_reserve_fqid(u32 fqid)
{
        return qman_reserve_fqid_range(fqid, 1);
}

/* Pool-channel management */
/**
 * qman_alloc_pool_range - Allocate a contiguous range of pool-channel IDs
 * @result: is set by the API to the base pool-channel ID of the allocated range
 * @count: the number of pool-channel IDs required
 * @align: required alignment of the allocated range
 * @partial: non-zero if the API can return fewer than @count
 *
 * Returns the number of pool-channel IDs allocated, or a negative error code.
 * If @partial is non zero, the allocation request may return a smaller range of
 * than requested (though alignment will be as requested). If @partial is zero,
 * the return value will either be 'count' or negative.
 */
int qman_alloc_pool_range(u32 *result, u32 count, u32 align, int partial);
static inline int qman_alloc_pool(u32 *result)
{
        int ret = qman_alloc_pool_range(result, 1, 0, 0);

        return (ret > 0) ? 0 : ret;
}

/**
 * qman_release_pool_range - Release the specified range of pool-channel IDs
 * @id: the base pool-channel ID of the range to deallocate
 * @count: the number of pool-channel IDs in the range
 */
void qman_release_pool_range(u32 id, unsigned int count);
static inline void qman_release_pool(u32 id)
{
        qman_release_pool_range(id, 1);
}

/**
 * qman_reserve_pool_range - Reserve the specified range of pool-channel IDs
 * @id: the base pool-channel ID of the range to reserve
 * @count: the number of pool-channel IDs in the range
 */
int qman_reserve_pool_range(u32 id, unsigned int count);
static inline int qman_reserve_pool(u32 id)
{
        return qman_reserve_pool_range(id, 1);
}

void qman_seed_pool_range(u32 id, unsigned int count);

        /* CGR management */
        /* -------------- */
/**
 * qman_create_cgr - Register a congestion group object
 * @cgr: the 'cgr' object, with fields filled in
 * @flags: QMAN_CGR_FLAG_* values
 * @opts: optional state of CGR settings
 *
 * Registers this object to receiving congestion entry/exit callbacks on the
 * portal affine to the cpu portal on which this API is executed. If opts is
 * NULL then only the callback (cgr->cb) function is registered. If @flags
 * contains QMAN_CGR_FLAG_USE_INIT, then an init hw command (which will reset
 * any unspecified parameters) will be used rather than a modify hw hardware
 * (which only modifies the specified parameters).
 */
int qman_create_cgr(struct qman_cgr *cgr, u32 flags,
                    struct qm_mcc_initcgr *opts);

/**
 * qman_create_cgr_to_dcp - Register a congestion group object to DCP portal
 * @cgr: the 'cgr' object, with fields filled in
 * @flags: QMAN_CGR_FLAG_* values
 * @dcp_portal: the DCP portal to which the cgr object is registered.
 * @opts: optional state of CGR settings
 *
 */
int qman_create_cgr_to_dcp(struct qman_cgr *cgr, u32 flags, u16 dcp_portal,
                           struct qm_mcc_initcgr *opts);

/**
 * qman_delete_cgr - Deregisters a congestion group object
 * @cgr: the 'cgr' object to deregister
 *
 * "Unplugs" this CGR object from the portal affine to the cpu on which this API
 * is executed. This must be excuted on the same affine portal on which it was
 * created.
 */
int qman_delete_cgr(struct qman_cgr *cgr);

/**
 * qman_modify_cgr - Modify CGR fields
 * @cgr: the 'cgr' object to modify
 * @flags: QMAN_CGR_FLAG_* values
 * @opts: the CGR-modification settings
 *
 * The @opts parameter comes from the low-level portal API, and can be NULL.
 * Note that some fields and options within @opts may be ignored or overwritten
 * by the driver, in particular the 'cgrid' field is ignored (this operation
 * only affects the given CGR object). If @flags contains
 * QMAN_CGR_FLAG_USE_INIT, then an init hw command (which will reset any
 * unspecified parameters) will be used rather than a modify hw hardware (which
 * only modifies the specified parameters).
 */
int qman_modify_cgr(struct qman_cgr *cgr, u32 flags,
                    struct qm_mcc_initcgr *opts);

/**
 * qman_query_cgr - Queries CGR fields
 * @cgr: the 'cgr' object to query
 * @result: storage for the queried congestion group record
 */
int qman_query_cgr(struct qman_cgr *cgr, struct qm_mcr_querycgr *result);

/**
 * qman_query_congestion - Queries the state of all congestion groups
 * @congestion: storage for the queried state of all congestion groups
 */
int qman_query_congestion(struct qm_mcr_querycongestion *congestion);

/**
 * qman_alloc_cgrid_range - Allocate a contiguous range of CGR IDs
 * @result: is set by the API to the base CGR ID of the allocated range
 * @count: the number of CGR IDs required
 * @align: required alignment of the allocated range
 * @partial: non-zero if the API can return fewer than @count
 *
 * Returns the number of CGR IDs allocated, or a negative error code.
 * If @partial is non zero, the allocation request may return a smaller range of
 * than requested (though alignment will be as requested). If @partial is zero,
 * the return value will either be 'count' or negative.
 */
int qman_alloc_cgrid_range(u32 *result, u32 count, u32 align, int partial);
static inline int qman_alloc_cgrid(u32 *result)
{
        int ret = qman_alloc_cgrid_range(result, 1, 0, 0);

        return (ret > 0) ? 0 : ret;
}

/**
 * qman_release_cgrid_range - Release the specified range of CGR IDs
 * @id: the base CGR ID of the range to deallocate
 * @count: the number of CGR IDs in the range
 */
void qman_release_cgrid_range(u32 id, unsigned int count);
static inline void qman_release_cgrid(u32 id)
{
        qman_release_cgrid_range(id, 1);
}

/**
 * qman_reserve_cgrid_range - Reserve the specified range of CGR ID
 * @id: the base CGR ID of the range to reserve
 * @count: the number of CGR IDs in the range
 */
int qman_reserve_cgrid_range(u32 id, unsigned int count);
static inline int qman_reserve_cgrid(u32 id)
{
        return qman_reserve_cgrid_range(id, 1);
}

void qman_seed_cgrid_range(u32 id, unsigned int count);

        /* Helpers */
        /* ------- */
/**
 * qman_poll_fq_for_init - Check if an FQ has been initialised from OOS
 * @fqid: the FQID that will be initialised by other s/w
 *
 * In many situations, a FQID is provided for communication between s/w
 * entities, and whilst the consumer is responsible for initialising and
 * scheduling the FQ, the producer(s) generally create a wrapper FQ object using
 * and only call qman_enqueue() (no FQ initialisation, scheduling, etc). Ie;
 *     qman_create_fq(..., QMAN_FQ_FLAG_NO_MODIFY, ...);
 * However, data can not be enqueued to the FQ until it is initialised out of
 * the OOS state - this function polls for that condition. It is particularly
 * useful for users of IPC functions - each endpoint's Rx FQ is the other
 * endpoint's Tx FQ, so each side can initialise and schedule their Rx FQ object
 * and then use this API on the (NO_MODIFY) Tx FQ object in order to
 * synchronise. The function returns zero for success, +1 if the FQ is still in
 * the OOS state, or negative if there was an error.
 */
static inline int qman_poll_fq_for_init(struct qman_fq *fq)
{
        struct qm_mcr_queryfq_np np;
        int err;

        err = qman_query_fq_np(fq, &np);
        if (err)
                return err;
        if ((np.state & QM_MCR_NP_STATE_MASK) == QM_MCR_NP_STATE_OOS)
                return 1;
        return 0;
}

#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define cpu_to_hw_sg(x) (x)
#define hw_sg_to_cpu(x) (x)
#else
#define cpu_to_hw_sg(x)  __cpu_to_hw_sg(x)
#define hw_sg_to_cpu(x)  __hw_sg_to_cpu(x)

static inline void __cpu_to_hw_sg(struct qm_sg_entry *sgentry)
{
        sgentry->opaque = cpu_to_be64(sgentry->opaque);
        sgentry->val = cpu_to_be32(sgentry->val);
        sgentry->val_off = cpu_to_be16(sgentry->val_off);
}

static inline void __hw_sg_to_cpu(struct qm_sg_entry *sgentry)
{
        sgentry->opaque = be64_to_cpu(sgentry->opaque);
        sgentry->val = be32_to_cpu(sgentry->val);
        sgentry->val_off = be16_to_cpu(sgentry->val_off);
}
#endif

#ifdef __cplusplus
}
#endif

#endif /* __FSL_QMAN_H */