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[unleashed/lotheac.git] / include / sys / mac_soft_ring.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright 2017 Joyent, Inc.
 */

#ifndef _SYS_MAC_SOFT_RING_H
#define _SYS_MAC_SOFT_RING_H

#ifdef  __cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include <sys/cpuvar.h>
#include <sys/cpupart.h>
#include <sys/processor.h>
#include <sys/stream.h>
#include <sys/squeue.h>
#include <sys/dlpi.h>
#include <sys/mac_impl.h>
#include <sys/mac_stat.h>

#define S_RING_NAMELEN 64

#define MAX_SR_FANOUT   24

extern boolean_t mac_soft_ring_enable;
extern boolean_t mac_latency_optimize;

typedef struct mac_soft_ring_s mac_soft_ring_t;
typedef struct mac_soft_ring_set_s mac_soft_ring_set_t;

typedef void (*mac_soft_ring_drain_func_t)(mac_soft_ring_t *);
typedef mac_tx_cookie_t (*mac_tx_func_t)(mac_soft_ring_set_t *, mblk_t *,
    uintptr_t, uint16_t, mblk_t **);


/* Tx notify callback */
typedef struct mac_tx_notify_cb_s {
        mac_cb_t                mtnf_link;      /* Linked list of callbacks */
        mac_tx_notify_t         mtnf_fn;        /* The callback function */
        void                    *mtnf_arg;      /* Callback function argument */
} mac_tx_notify_cb_t;

struct mac_soft_ring_s {
        /* Keep the most used members 64bytes cache aligned */
        kmutex_t        s_ring_lock;    /* lock before using any member */
        uint16_t        s_ring_type;    /* processing model of the sq */
        uint16_t        s_ring_state;   /* state flags and message count */
        int             s_ring_count;   /* # of mblocks in mac_soft_ring */
        size_t          s_ring_size;    /* Size of data queued */
        mblk_t          *s_ring_first;  /* first mblk chain or NULL */
        mblk_t          *s_ring_last;   /* last mblk chain or NULL */

        mac_direct_rx_t s_ring_rx_func;
        void            *s_ring_rx_arg1;
        mac_resource_handle_t  s_ring_rx_arg2;

        /*
         * Threshold after which packets get dropped.
         * Is always greater than s_ring_tx_hiwat
         */
        int             s_ring_tx_max_q_cnt;
        /* # of mblocks after which to apply flow control */
        int             s_ring_tx_hiwat;
        /* # of mblocks after which to relieve flow control */
        int             s_ring_tx_lowat;
        boolean_t       s_ring_tx_woken_up;
        uint32_t        s_ring_hiwat_cnt;       /* times blocked for Tx descs */

        void            *s_ring_tx_arg1;
        void            *s_ring_tx_arg2;

        /* Tx notify callback */
        mac_cb_info_t   s_ring_notify_cb_info;          /* cb list info */
        mac_cb_t        *s_ring_notify_cb_list;         /* The cb list */

        clock_t         s_ring_awaken;  /* time async thread was awakened */

        kthread_t       *s_ring_run;    /* Current thread processing sq */
        processorid_t   s_ring_cpuid;   /* processor to bind to */
        processorid_t   s_ring_cpuid_save;      /* saved cpuid during offline */
        kcondvar_t      s_ring_async;   /* async thread blocks on */
        clock_t         s_ring_wait;    /* lbolts to wait after a fill() */
        timeout_id_t    s_ring_tid;     /* timer id of pending timeout() */
        kthread_t       *s_ring_worker; /* kernel thread id */
        char            s_ring_name[S_RING_NAMELEN + 1];
        uint32_t        s_ring_total_inpkt;
        uint32_t        s_ring_total_rbytes;
        uint32_t        s_ring_drops;
        struct mac_client_impl_s *s_ring_mcip;
        kstat_t         *s_ring_ksp;

        /* Teardown, poll disable control ops */
        kcondvar_t      s_ring_client_cv; /* Client wait for control op */

        mac_soft_ring_set_t *s_ring_set;   /* The SRS this ring belongs to */
        mac_soft_ring_t *s_ring_next;
        mac_soft_ring_t *s_ring_prev;
        mac_soft_ring_drain_func_t s_ring_drain_func;

        mac_tx_stats_t  s_st_stat;
};

typedef void (*mac_srs_drain_proc_t)(mac_soft_ring_set_t *, uint_t);

/* Transmit side Soft Ring Set */
typedef struct mac_srs_tx_s {
        /* Members for Tx size processing */
        uint32_t        st_mode;
        mac_tx_func_t   st_func;
        void            *st_arg1;
        void            *st_arg2;
        mac_group_t     *st_group;      /* TX group for share */
        boolean_t       st_woken_up;

        /*
         * st_max_q_cnt is the queue depth threshold to limit
         * outstanding packets on the Tx SRS. Once the limit
         * is reached, Tx SRS will drop packets until the
         * limit goes below the threshold.
         */
        uint32_t        st_max_q_cnt;   /* max. outstanding packets */
        /*
         * st_hiwat is used Tx serializer and bandwidth mode.
         * This is the queue depth threshold upto which
         * packets will get buffered with no flow-control
         * back pressure applied to the caller. Once this
         * threshold is reached, back pressure will be
         * applied to the caller of mac_tx() (mac_tx() starts
         * returning a cookie to indicate a blocked SRS).
         * st_hiwat should always be lesser than or equal to
         * st_max_q_cnt.
         */
        uint32_t        st_hiwat;       /* mblk cnt to apply flow control */
        uint32_t        st_lowat;       /* mblk cnt to relieve flow control */
        uint32_t        st_hiwat_cnt; /* times blocked for Tx descs */
        mac_tx_stats_t  st_stat;
        mac_capab_aggr_t        st_capab_aggr;
        /*
         * st_soft_rings is used as an array to store aggr Tx soft
         * rings. When aggr_find_tx_ring() returns a pseudo ring,
         * the associated soft ring has to be found. st_soft_rings
         * array stores the soft ring associated with a pseudo Tx
         * ring and it can be accessed using the pseudo ring
         * index (mr_index). Note that the ring index is unique
         * for each ring in a group.
         */
        mac_soft_ring_t **st_soft_rings;
} mac_srs_tx_t;

/* Receive side Soft Ring Set */
typedef struct mac_srs_rx_s {
        /*
         * Upcall Function for fanout, Rx processing etc. Perhaps
         * the same 3 members below can be used for Tx
         * processing, but looking around, mac_rx_func_t has
         * proliferated too much into various files at different
         * places. I am leaving the consolidation battle for
         * another day.
         */
        mac_direct_rx_t         sr_func;        /* srs_lock */
        void                    *sr_arg1;       /* srs_lock */
        mac_resource_handle_t   sr_arg2;        /* srs_lock */
        mac_rx_func_t           sr_lower_proc;  /* Atomically changed */
        uint32_t                sr_poll_pkt_cnt;
        uint32_t                sr_poll_thres;

        /* mblk cnt to apply flow control */
        uint32_t                sr_hiwat;
        /* mblk cnt to relieve flow control */
        uint32_t                sr_lowat;
        mac_rx_stats_t          sr_stat;

        /* Times polling was enabled */
        uint32_t                sr_poll_on;
        /* Times polling was enabled by worker thread */
        uint32_t                sr_worker_poll_on;
        /* Times polling was disabled */
        uint32_t                sr_poll_off;
        /* Poll thread signalled count */
        uint32_t                sr_poll_thr_sig;
        /* Poll thread busy */
        uint32_t                sr_poll_thr_busy;
        /* SRS drains, stays in poll mode but doesn't poll */
        uint32_t                sr_poll_drain_no_poll;
        /*
         * SRS has nothing to do and no packets in H/W but
         * there is a backlog in softrings. SRS stays in
         * poll mode but doesn't do polling.
         */
        uint32_t                sr_poll_no_poll;
        /* Active polling restarted */
        uint32_t                sr_below_hiwat;
        /* Found packets in last poll so try and poll again */
        uint32_t                sr_poll_again;
        /*
         * Packets in queue but poll thread not allowed to process so
         * signal the worker thread.
         */
        uint32_t                sr_poll_sig_worker;
        /*
         * Poll thread has nothing to do and H/W has nothing so
         * reenable the interrupts.
         */
        uint32_t                sr_poll_intr_enable;
        /*
         * Poll thread has nothing to do and worker thread was already
         * running so it can decide to reenable interrupt or poll again.
         */
        uint32_t                sr_poll_goto_sleep;
        /* Worker thread goes back to draining the queue */
        uint32_t                sr_drain_again;
        /* More Packets in queue so signal the poll thread to drain */
        uint32_t                sr_drain_poll_sig;
        /* More Packets in queue so signal the worker thread to drain */
        uint32_t                sr_drain_worker_sig;
        /* Poll thread is already running so worker has nothing to do */
        uint32_t                sr_drain_poll_running;
        /* We have packets already queued so keep polling */
        uint32_t                sr_drain_keep_polling;
        /* Drain is done and interrupts are reenabled */
        uint32_t                sr_drain_finish_intr;
        /* Polling thread needs to schedule worker wakeup */
        uint32_t                sr_poll_worker_wakeup;
} mac_srs_rx_t;

/*
 * mac_soft_ring_set_s:
 * This is used both for Tx and Rx side. The srs_type identifies Rx or
 * Tx type.
 *
 * Note that the structure is carefully crafted, with Rx elements coming
 * first followed by Tx specific members. Future additions to this
 * structure should follow the same guidelines.
 *
 * Rx-side notes:
 * mac_rx_classify_flow_add() always creates a mac_soft_ring_set_t and fn_flow
 * points to info from it (func = srs_lower_proc, arg = soft_ring_set). On
 * interrupt path, srs_lower_proc does B/W adjustment and switch to polling mode
 * (if poll capable) and feeds the packets to soft_ring_list via choosen
 * fanout type (specified by srs_type). In poll mode, the poll thread which is
 * also a pointer can pick up the packets and feed them to various
 * soft_ring_list.
 *
 * The srs_type can either be protocol based or fanout based where fanout itelf
 * can be various types
 *
 * The polling works by turning off interrupts as soon as a packets
 * are queued on the soft ring set. Once the backlog is clear and poll
 * thread return empty handed i.e. Rx ring doesn't have anything, the
 * interrupt is turned back on. For this purpose we keep a separate
 * srs_poll_pkt_cnt counter which tracks the packets queued between SRS
 * and the soft rings as well. The counter is incremented when packets
 * are queued and decremented when SRS processes them (in case it has
 * no soft rings) or the soft ring process them. Its important that
 * in case SRS has softrings, the decrement doesn't happen till the
 * packet is processed by the soft rings since it takes very little time
 * for SRS to queue packet from SRS to soft rings and it will keep
 * bringing more packets in the system faster than soft rings can
 * process them.
 *
 * Tx side notes:
 * The srs structure acts as a serializer with a worker thread. The
 * default behavior of srs though is to act as a pass-thru. The queues
 * (srs_first, srs_last, srs_count) get used when Tx ring runs out of Tx
 * descriptors or to enforce bandwidth limits.
 *
 * When multiple Tx rings are present, the SRS state will be set to
 * SRS_FANOUT_OTH. Outgoing packets coming into mac_tx_srs_process()
 * function will be fanned out to one of the Tx side soft rings based on
 * a hint passed in mac_tx_srs_process(). Each soft ring, in turn, will
 * be associated with a distinct h/w Tx ring.
 */

struct mac_soft_ring_set_s {
        /*
         * Common elements, common to both Rx and Tx SRS type.
         * The following block of fields are protected by srs_lock
         */
        kmutex_t        srs_lock;
        uint32_t        srs_type;
        uint32_t        srs_state;      /* state flags */
        uint32_t        srs_count;
        mblk_t          *srs_first;     /* first mblk chain or NULL */
        mblk_t          *srs_last;      /* last mblk chain or NULL */
        kcondvar_t      srs_async;      /* cv for worker thread */
        kcondvar_t      srs_cv;         /* cv for poll thread */
        kcondvar_t      srs_quiesce_done_cv;    /* cv for removal */
        timeout_id_t    srs_tid;        /* timeout id for pending timeout */

        /*
         * List of soft rings & processing function.
         * The following block is protected by Rx quiescence.
         * i.e. they can be changed only after quiescing the SRS
         * Protected by srs_lock.
         */
        mac_soft_ring_t *srs_soft_ring_head;
        mac_soft_ring_t *srs_soft_ring_tail;
        int             srs_soft_ring_count;
        int             srs_soft_ring_quiesced_count;
        int             srs_soft_ring_condemned_count;
        mac_soft_ring_t **srs_tcp_soft_rings;
        int             srs_tcp_ring_count;
        mac_soft_ring_t **srs_udp_soft_rings;
        int             srs_udp_ring_count;
        mac_soft_ring_t **srs_oth_soft_rings;
        int             srs_oth_ring_count;
        /*
         * srs_tx_soft_rings is used by tx_srs in
         * when operating in multi tx ring mode.
         */
        mac_soft_ring_t **srs_tx_soft_rings;
        int             srs_tx_ring_count;

        /*
         * Bandwidth control related members.
         * They are common to both Rx- and Tx-side.
         * Following protected by srs_lock
         */
        mac_bw_ctl_t    *srs_bw;
        size_t          srs_size;       /* Size of packets queued in bytes */
        pri_t           srs_pri;

        mac_soft_ring_set_t     *srs_next;      /* mac_srs_g_lock */
        mac_soft_ring_set_t     *srs_prev;      /* mac_srs_g_lock */

        /* Attribute specific drain func (BW ctl vs non-BW ctl) */
        mac_srs_drain_proc_t    srs_drain_func; /* Write once (WO) */

        /*
         * If the associated ring is exclusively used by a mac client, e.g.,
         * an aggregation, this fields is used to keep a reference to the
         * MAC client's pseudo ring.
         */
        mac_resource_handle_t   srs_mrh;
        /*
         * The following blocks are write once (WO) and valid for the life
         * of the SRS
         */
        struct mac_client_impl_s *srs_mcip;     /* back ptr to mac client */
        void                    *srs_flent;     /* back ptr to flent */
        mac_ring_t              *srs_ring;      /*  Ring Descriptor */

        /* Teardown, disable control ops */
        kcondvar_t      srs_client_cv;  /* Client wait for the control op */

        kthread_t       *srs_worker;    /* WO, worker thread */
        kthread_t       *srs_poll_thr;  /* WO, poll thread */

        uint_t          srs_ind;        /* Round Robin indx for picking up SR */
        processorid_t   srs_worker_cpuid;       /* processor to bind to */
        processorid_t   srs_worker_cpuid_save;  /* saved cpuid during offline */
        processorid_t   srs_poll_cpuid;         /* processor to bind to */
        processorid_t   srs_poll_cpuid_save;    /* saved cpuid during offline */
        uint_t          srs_fanout_state;
        mac_cpus_t      srs_cpu;

        mac_srs_rx_t    srs_rx;
        mac_srs_tx_t    srs_tx;
        kstat_t         *srs_ksp;
};

/*
 * type flags - combination allowed to process and drain the queue
 */
#define ST_RING_WORKER_ONLY     0x0001  /* Worker thread only */
#define ST_RING_ANY             0x0002  /* Any thread can process the queue */
#define ST_RING_TCP             0x0004
#define ST_RING_UDP             0x0008
#define ST_RING_OTH             0x0010

#define ST_RING_BW_CTL          0x0020
#define ST_RING_TX              0x0040

/*
 * State flags.
 */
#define S_RING_PROC             0x0001  /* being processed */
#define S_RING_BOUND            0x0002  /* Worker thread is bound to a cpu */
#define S_RING_BLOCK            0x0004  /* No Tx descs */
#define S_RING_TX_HIWAT         0x0008  /* Tx high watermark reached */

#define S_RING_WAKEUP_CLIENT    0x0010  /* flow ctrl, client wakeup needed */
#define S_RING_BLANK            0x0020  /* Has been put into polling mode */
#define S_RING_CLIENT_WAIT      0x0040  /* Client waiting for control op */

#define S_RING_CONDEMNED        0x0100  /* Being torn down */
#define S_RING_CONDEMNED_DONE   0x0200  /* Being torn down */
#define S_RING_QUIESCE          0x0400  /* No traffic flow, transient flag */
#define S_RING_QUIESCE_DONE     0x0800  /* No traffic flow, transient flag */

#define S_RING_RESTART          0x1000  /* Go back to normal traffic flow */
#define S_RING_ENQUEUED         0x2000  /* Pkts enqueued in Tx soft ring */

/*
 * arguments for processors to bind to
 */
#define S_RING_BIND_NONE        -1

/*
 * defines for srs_type - identifies a link or a sub-flow
 * and other static characteristics of a SRS like a tx
 * srs, tcp only srs, etc.
 */
#define SRST_LINK               0x00000001
#define SRST_FLOW               0x00000002
#define SRST_NO_SOFT_RINGS      0x00000004
#define SRST_TCP_ONLY           0x00000008

#define SRST_FANOUT_PROTO       0x00000010
#define SRST_FANOUT_SRC_IP      0x00000020
#define SRST_FANOUT_OTH         0x00000040
#define SRST_DEFAULT_GRP        0x00000080

#define SRST_TX                 0x00000100
#define SRST_BW_CONTROL         0x00000200
#define SRST_DIRECT_POLL        0x00000400

#define SRST_DLS_BYPASS         0x00001000
#define SRST_CLIENT_POLL_ENABLED 0x00002000

/*
 * soft ring set flags. These bits are dynamic in nature and get
 * applied to srs_state. They reflect the state of SRS at any
 * point of time
 */
#define SRS_BLANK               0x00000001
#define SRS_WORKER_BOUND        0x00000002
#define SRS_POLL_BOUND          0x00000004
#define SRS_POLLING_CAPAB       0x00000008

#define SRS_PROC                0x00000010
#define SRS_GET_PKTS            0x00000020
#define SRS_POLLING             0x00000040
#define SRS_BW_ENFORCED         0x00000080

#define SRS_WORKER              0x00000100
#define SRS_ENQUEUED            0x00000200
#define SRS_ANY_PROCESS         0x00000400
#define SRS_PROC_FAST           0x00000800

#define SRS_POLL_PROC           0x00001000
#define SRS_TX_BLOCKED          0x00002000      /* out of Tx descs */
#define SRS_TX_HIWAT            0x00004000      /* Tx count exceeds hiwat */
#define SRS_TX_WAKEUP_CLIENT    0x00008000      /* Flow-ctl: wakeup client */

#define SRS_CLIENT_PROC         0x00010000
#define SRS_CLIENT_WAIT         0x00020000
#define SRS_QUIESCE             0x00040000
#define SRS_QUIESCE_DONE        0x00080000

#define SRS_CONDEMNED           0x00100000
#define SRS_CONDEMNED_DONE      0x00200000
#define SRS_POLL_THR_QUIESCED   0x00400000
#define SRS_RESTART             0x00800000

#define SRS_RESTART_DONE        0x01000000
#define SRS_POLL_THR_RESTART    0x02000000
#define SRS_IN_GLIST            0x04000000
#define SRS_POLL_THR_EXITED     0x08000000

#define SRS_QUIESCE_PERM        0x10000000
#define SRS_LATENCY_OPT         0x20000000
#define SRS_SOFTRING_QUEUE      0x40000000

#define SRS_QUIESCED(srs)       (srs->srs_state & SRS_QUIESCE_DONE)

/*
 * If the SRS_QUIESCE_PERM flag is set, the SRS worker thread will not be
 * able to be restarted.
 */
#define SRS_QUIESCED_PERMANENT(srs)     (srs->srs_state & SRS_QUIESCE_PERM)

/*
 * soft ring set (SRS) Tx modes
 */
typedef enum {
        SRS_TX_DEFAULT = 0,
        SRS_TX_SERIALIZE,
        SRS_TX_FANOUT,
        SRS_TX_BW,
        SRS_TX_BW_FANOUT,
        SRS_TX_AGGR,
        SRS_TX_BW_AGGR
} mac_tx_srs_mode_t;

/*
 * SRS fanout states
 */
typedef enum {
        SRS_FANOUT_UNINIT = 0,
        SRS_FANOUT_INIT,
        SRS_FANOUT_REINIT
} mac_srs_fanout_state_t;

/*
 * Structure for dls statistics
 */
struct dls_kstats {
        kstat_named_t   dlss_soft_ring_pkt_drop;
};

extern struct dls_kstats dls_kstat;

#define DLS_BUMP_STAT(x, y)     (dls_kstat.x.value.ui32 += y)

/* Turn dynamic polling off */
#define MAC_SRS_POLLING_OFF(mac_srs) {                                  \
        ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock));                       \
        if (((mac_srs)->srs_state & (SRS_POLLING_CAPAB|SRS_POLLING)) == \
            (SRS_POLLING_CAPAB|SRS_POLLING)) {                          \
                (mac_srs)->srs_state &= ~SRS_POLLING;                   \
                (void) mac_hwring_enable_intr((mac_ring_handle_t)       \
                    (mac_srs)->srs_ring);                               \
                (mac_srs)->srs_rx.sr_poll_off++;                        \
        }                                                               \
}

#define MAC_COUNT_CHAIN(mac_srs, head, tail, cnt, sz)   {       \
        mblk_t          *tmp;                                   \
        boolean_t       bw_ctl = B_FALSE;                       \
                                                                \
        ASSERT((head) != NULL);                                 \
        cnt = 0;                                                \
        sz = 0;                                                 \
        if ((mac_srs)->srs_type & SRST_BW_CONTROL)              \
                bw_ctl = B_TRUE;                                \
        tmp = tail = (head);                                    \
        if ((head)->b_next == NULL) {                           \
                cnt = 1;                                        \
                if (bw_ctl)                                     \
                        sz += msgdsize(head);                   \
        } else {                                                \
                while (tmp != NULL) {                           \
                        tail = tmp;                             \
                        cnt++;                                  \
                        if (bw_ctl)                             \
                                sz += msgdsize(tmp);            \
                        tmp = tmp->b_next;                      \
                }                                               \
        }                                                       \
}

/*
 * Decrement the cumulative packet count in SRS and its
 * soft rings. If the srs_poll_pkt_cnt goes below lowat, then check
 * if if the interface was left in a polling mode and no one
 * is really processing the queue (to get the interface out
 * of poll mode). If no one is processing the queue, then
 * acquire the PROC and signal the poll thread to check the
 * interface for packets and get the interface back to interrupt
 * mode if nothing is found.
 */
#define MAC_UPDATE_SRS_COUNT_LOCKED(mac_srs, cnt) {                     \
        mac_srs_rx_t    *srs_rx = &(mac_srs)->srs_rx;                   \
        ASSERT(MUTEX_HELD(&(mac_srs)->srs_lock));                       \
                                                                        \
        srs_rx->sr_poll_pkt_cnt -= cnt;                                 \
        if ((srs_rx->sr_poll_pkt_cnt <= srs_rx->sr_poll_thres) &&       \
                (((mac_srs)->srs_state &                                \
                (SRS_POLLING|SRS_PROC|SRS_GET_PKTS)) == SRS_POLLING))   \
        {                                                               \
                (mac_srs)->srs_state |= (SRS_PROC|SRS_GET_PKTS);        \
                cv_signal(&(mac_srs)->srs_cv);                          \
                srs_rx->sr_below_hiwat++;                               \
        }                                                               \
}

/*
 * The following two macros are used to update the inbound packet and byte.
 * count. The packet and byte count reflect the packets and bytes that are
 * taken out of the SRS's queue, i.e. indicating they are being delivered.
 * The srs_count and srs_size are updated in different locations as the
 * srs_size is also used to take into account any bandwidth limits. The
 * srs_size is updated only when a soft ring, if any, sends a packet up,
 * as opposed to updating it when the SRS sends a packet to the SR, i.e.
 * the srs_size reflects the packets in the SRS and SRs. These
 * macros decrement the srs_size and srs_count and also increment the
 * ipackets and ibytes stats resp.
 *
 * xxx-venu These are done under srs_lock, for now we still update
 * mci_stat_ibytes/mci_stat_ipackets atomically, need to check if
 * just updating them would be accurate enough.
 *
 * If we are updating these for a sub-flow SRS, then we need to also
 * updated it's MAC client bandwidth info, if the MAC client is also
 * bandwidth regulated.
 */
#define MAC_UPDATE_SRS_SIZE_LOCKED(srs, sz) {                           \
        if ((srs)->srs_type & SRST_BW_CONTROL) {                        \
                mutex_enter(&(srs)->srs_bw->mac_bw_lock);               \
                (srs)->srs_bw->mac_bw_sz -= (sz);                       \
                (srs)->srs_bw->mac_bw_used += (sz);                     \
                mutex_exit(&(srs)->srs_bw->mac_bw_lock);                \
        }                                                               \
}

#define MAC_TX_UPDATE_BW_INFO(srs, sz) {                                \
        (srs)->srs_bw->mac_bw_sz -= (sz);                               \
        (srs)->srs_bw->mac_bw_used += (sz);                             \
}

#define MAC_TX_SOFT_RINGS(mac_srs) ((mac_srs)->srs_tx_ring_count >= 1)

/* Soft ring flags for teardown */
#define SRS_POLL_THR_OWNER      (SRS_PROC | SRS_POLLING | SRS_GET_PKTS)
#define SRS_PAUSE               (SRS_CONDEMNED | SRS_QUIESCE)
#define S_RING_PAUSE            (S_RING_CONDEMNED | S_RING_QUIESCE)

/* Soft rings */
extern void mac_soft_ring_init(void);
extern void mac_soft_ring_finish(void);
extern void mac_fanout_setup(mac_client_impl_t *, flow_entry_t *,
    mac_resource_props_t *, mac_direct_rx_t, void *, mac_resource_handle_t,
    cpupart_t *);

extern void mac_soft_ring_worker_wakeup(mac_soft_ring_t *);
extern void mac_soft_ring_blank(void *, time_t, uint_t, int);
extern mblk_t *mac_soft_ring_poll(mac_soft_ring_t *, int);
extern void mac_soft_ring_destroy(mac_soft_ring_t *);
extern void mac_soft_ring_dls_bypass(void *, mac_direct_rx_t, void *);

/* Rx SRS */
extern mac_soft_ring_set_t *mac_srs_create(struct mac_client_impl_s *,
    flow_entry_t *, uint32_t, mac_direct_rx_t, void *, mac_resource_handle_t,
    mac_ring_t *);
extern void mac_srs_free(mac_soft_ring_set_t *);
extern void mac_srs_signal(mac_soft_ring_set_t *, uint_t);
extern cpu_t *mac_srs_bind(mac_soft_ring_set_t *, processorid_t);
extern void mac_rx_srs_retarget_intr(mac_soft_ring_set_t *, processorid_t);
extern void mac_tx_srs_retarget_intr(mac_soft_ring_set_t *);

extern void mac_srs_quiesce_initiate(mac_soft_ring_set_t *);
extern void mac_srs_client_poll_enable(struct mac_client_impl_s *,
    mac_soft_ring_set_t *);
extern void mac_srs_client_poll_disable(struct mac_client_impl_s *,
    mac_soft_ring_set_t *);
extern void mac_srs_client_poll_quiesce(struct mac_client_impl_s *,
    mac_soft_ring_set_t *);
extern void mac_srs_client_poll_restart(struct mac_client_impl_s *,
    mac_soft_ring_set_t *);
extern void mac_rx_srs_quiesce(mac_soft_ring_set_t *, uint_t);
extern void mac_rx_srs_restart(mac_soft_ring_set_t *);
extern void mac_rx_srs_subflow_process(void *, mac_resource_handle_t, mblk_t *,
    boolean_t);
extern void mac_tx_srs_quiesce(mac_soft_ring_set_t *, uint_t);

/* Tx SRS, Tx softring */
extern void mac_tx_srs_wakeup(mac_soft_ring_set_t *, mac_ring_handle_t);
extern void mac_tx_srs_setup(struct mac_client_impl_s *, flow_entry_t *);
extern mac_tx_func_t mac_tx_get_func(uint32_t);
extern mblk_t *mac_tx_send(mac_client_handle_t, mac_ring_handle_t, mblk_t *,
    mac_tx_stats_t *);
extern boolean_t mac_tx_srs_ring_present(mac_soft_ring_set_t *, mac_ring_t *);
extern mac_soft_ring_t *mac_tx_srs_get_soft_ring(mac_soft_ring_set_t *,
    mac_ring_t *);
extern void mac_tx_srs_add_ring(mac_soft_ring_set_t *, mac_ring_t *);
extern void mac_tx_srs_del_ring(mac_soft_ring_set_t *, mac_ring_t *);
extern mac_tx_cookie_t mac_tx_srs_no_desc(mac_soft_ring_set_t *, mblk_t *,
    uint16_t, mblk_t **);

/* Subflow specific stuff */
extern int mac_srs_flow_create(struct mac_client_impl_s *, flow_entry_t *,
    mac_resource_props_t *, int, int, mac_direct_rx_t);
extern void mac_srs_update_bwlimit(flow_entry_t *, mac_resource_props_t *);
extern void mac_srs_adjust_subflow_bwlimit(struct mac_client_impl_s *);
extern void mac_srs_update_drv(struct mac_client_impl_s *);
extern void mac_update_srs_priority(mac_soft_ring_set_t *, pri_t);
extern void mac_client_update_classifier(mac_client_impl_t *, boolean_t);

extern void mac_soft_ring_intr_enable(void *);
extern boolean_t mac_soft_ring_intr_disable(void *);
extern mac_soft_ring_t *mac_soft_ring_create(int, clock_t, uint16_t,
    pri_t, mac_client_impl_t *, mac_soft_ring_set_t *,
    processorid_t, mac_direct_rx_t, void *, mac_resource_handle_t);
extern cpu_t *mac_soft_ring_bind(mac_soft_ring_t *, processorid_t);
        extern void mac_soft_ring_unbind(mac_soft_ring_t *);
extern void mac_soft_ring_free(mac_soft_ring_t *);
extern void mac_soft_ring_signal(mac_soft_ring_t *, uint_t);
extern void mac_rx_soft_ring_process(mac_client_impl_t *, mac_soft_ring_t *,
    mblk_t *, mblk_t *, int, size_t);
extern mac_tx_cookie_t mac_tx_soft_ring_process(mac_soft_ring_t *,
    mblk_t *, uint16_t, mblk_t **);
extern void mac_srs_worker_quiesce(mac_soft_ring_set_t *);
extern void mac_srs_worker_restart(mac_soft_ring_set_t *);
extern void mac_rx_attach_flow_srs(mac_impl_t *, flow_entry_t *,
    mac_soft_ring_set_t *, mac_ring_t *, mac_classify_type_t);

extern void mac_rx_srs_drain_bw(mac_soft_ring_set_t *, uint_t);
extern void mac_rx_srs_drain(mac_soft_ring_set_t *, uint_t);
extern void mac_rx_srs_process(void *, mac_resource_handle_t, mblk_t *,
    boolean_t);
extern void mac_srs_worker(mac_soft_ring_set_t *);
extern void mac_rx_srs_poll_ring(mac_soft_ring_set_t *);
extern void mac_tx_srs_drain(mac_soft_ring_set_t *, uint_t);

extern void mac_tx_srs_restart(mac_soft_ring_set_t *);
extern void mac_rx_srs_remove(mac_soft_ring_set_t *);

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_MAC_SOFT_RING_H */