Index: sys/conf/options =================================================================== --- sys/conf/options +++ sys/conf/options @@ -139,6 +139,7 @@ GEOM_VIRSTOR opt_geom.h GEOM_VOL opt_geom.h GEOM_ZERO opt_geom.h +IFLIB opt_iflib.h KDTRACE_HOOKS opt_global.h KDTRACE_FRAME opt_kdtrace.h KN_HASHSIZE opt_kqueue.h Index: sys/kern/device_if.m =================================================================== --- sys/kern/device_if.m +++ sys/kern/device_if.m @@ -62,6 +62,11 @@ { return 0; } + + static void * null_register(device_t dev) + { + return NULL; + } }; /** @@ -316,3 +321,24 @@ METHOD int quiesce { device_t dev; } DEFAULT null_quiesce; + +/** + * @brief This is called when the driver is asked to register handlers. + * + * + * To include this method in a device driver, use a line like this + * in the driver's method list: + * + * @code + * KOBJMETHOD(device_register, foo_register) + * @endcode + * + * @param dev the device for which handlers are being registered + * + * @retval NULL method not implemented + * @retval non-NULL a pointer to implementation specific static driver state + * + */ +METHOD void * register { + device_t dev; +} DEFAULT null_register; Index: sys/kern/kern_mbuf.c =================================================================== --- sys/kern/kern_mbuf.c +++ sys/kern/kern_mbuf.c @@ -444,7 +444,7 @@ flags = (unsigned long)arg; KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__)); - if ((m->m_flags & M_PKTHDR) && !SLIST_EMPTY(&m->m_pkthdr.tags)) + if (!(flags & MB_DTOR_SKIP) && (m->m_flags & M_PKTHDR) && !SLIST_EMPTY(&m->m_pkthdr.tags)) m_tag_delete_chain(m, NULL); #ifdef INVARIANTS trash_dtor(mem, size, arg); @@ -640,7 +640,12 @@ * after we have freed the external storage, since mbuf * could have been embedded in it. */ - freembuf = (m->m_flags & M_NOFREE) ? 0 : 1; + if (m->m_flags & M_NOFREE) { + freembuf = 0; + /* assert that we won't be double freeing */ + MPASS(m->m_ext.ext_type == EXT_EXTREF); + } else + freembuf = 1; /* Free attached storage if this mbuf is the only reference to it. */ if (*refcnt == 1 || atomic_fetchadd_int(refcnt, -1) == 1) { Index: sys/kern/subr_taskqueue.c =================================================================== --- sys/kern/subr_taskqueue.c +++ sys/kern/subr_taskqueue.c @@ -34,12 +34,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #include #include #include @@ -62,9 +64,11 @@ STAILQ_HEAD(, task) tq_queue; taskqueue_enqueue_fn tq_enqueue; void *tq_context; + char *tq_name; TAILQ_HEAD(, taskqueue_busy) tq_active; struct mtx tq_mutex; struct thread **tq_threads; + struct thread *tq_curthread; int tq_tcount; int tq_spin; int tq_flags; @@ -119,11 +123,17 @@ } static struct taskqueue * -_taskqueue_create(const char *name __unused, int mflags, +_taskqueue_create(const char *name, int mflags, taskqueue_enqueue_fn enqueue, void *context, - int mtxflags, const char *mtxname) + int mtxflags, const char *mtxname __unused) { struct taskqueue *queue; + char *tq_name = NULL; + + if (name != NULL) + tq_name = strndup(name, 32, M_TASKQUEUE); + if (tq_name == NULL) + tq_name = "taskqueue"; queue = malloc(sizeof(struct taskqueue), M_TASKQUEUE, mflags | M_ZERO); if (!queue) @@ -133,6 +143,7 @@ TAILQ_INIT(&queue->tq_active); queue->tq_enqueue = enqueue; queue->tq_context = context; + queue->tq_name = tq_name; queue->tq_spin = (mtxflags & MTX_SPIN) != 0; queue->tq_flags |= TQ_FLAGS_ACTIVE; if (enqueue == taskqueue_fast_enqueue || @@ -140,7 +151,7 @@ enqueue == taskqueue_swi_giant_enqueue || enqueue == taskqueue_thread_enqueue) queue->tq_flags |= TQ_FLAGS_UNLOCKED_ENQUEUE; - mtx_init(&queue->tq_mutex, mtxname, NULL, mtxflags); + mtx_init(&queue->tq_mutex, tq_name, NULL, mtxflags); return queue; } @@ -149,8 +160,9 @@ taskqueue_create(const char *name, int mflags, taskqueue_enqueue_fn enqueue, void *context) { + return _taskqueue_create(name, mflags, enqueue, context, - MTX_DEF, "taskqueue"); + MTX_DEF, name); } void @@ -194,6 +206,7 @@ KASSERT(queue->tq_callouts == 0, ("Armed timeout tasks")); mtx_destroy(&queue->tq_mutex); free(queue->tq_threads, M_TASKQUEUE); + free(queue->tq_name, M_TASKQUEUE); free(queue, M_TASKQUEUE); } @@ -203,11 +216,12 @@ struct task *ins; struct task *prev; + KASSERT(task->ta_func != NULL, ("enqueueing task with NULL func")); /* * Count multiple enqueues. */ if (task->ta_pending) { - if (task->ta_pending < USHRT_MAX) + if (task->ta_pending < UCHAR_MAX) task->ta_pending++; TQ_UNLOCK(queue); return (0); @@ -245,6 +259,22 @@ } int +grouptaskqueue_enqueue(struct taskqueue *queue, struct task *task) +{ + TQ_LOCK(queue); + if (task->ta_pending) { + TQ_UNLOCK(queue); + return (0); + } + STAILQ_INSERT_TAIL(&queue->tq_queue, task, ta_link); + task->ta_pending = 1; + TQ_UNLOCK(queue); + if ((queue->tq_flags & TQ_FLAGS_BLOCKED) == 0) + queue->tq_enqueue(queue->tq_context); + return (0); +} + +int taskqueue_enqueue(struct taskqueue *queue, struct task *task) { int res; @@ -410,6 +440,7 @@ struct task *task; int pending; + KASSERT(queue != NULL, ("tq is NULL")); TQ_ASSERT_LOCKED(queue); tb.tb_running = NULL; @@ -421,17 +452,20 @@ * zero its pending count. */ task = STAILQ_FIRST(&queue->tq_queue); + KASSERT(task != NULL, ("task is NULL")); STAILQ_REMOVE_HEAD(&queue->tq_queue, ta_link); pending = task->ta_pending; task->ta_pending = 0; tb.tb_running = task; TQ_UNLOCK(queue); + KASSERT(task->ta_func != NULL, ("task->ta_func is NULL")); task->ta_func(task->ta_context, pending); TQ_LOCK(queue); tb.tb_running = NULL; - wakeup(task); + if ((task->ta_flags & TASK_SKIP_WAKEUP) == 0) + wakeup(task); TAILQ_REMOVE(&queue->tq_active, &tb, tb_link); tb_first = TAILQ_FIRST(&queue->tq_active); @@ -446,7 +480,9 @@ { TQ_LOCK(queue); + queue->tq_curthread = curthread; taskqueue_run_locked(queue); + queue->tq_curthread = NULL; TQ_UNLOCK(queue); } @@ -679,7 +715,9 @@ tq = *tqp; taskqueue_run_callback(tq, TASKQUEUE_CALLBACK_TYPE_INIT); TQ_LOCK(tq); + tq->tq_curthread = curthread; while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) { + /* XXX ? */ taskqueue_run_locked(tq); /* * Because taskqueue_run() can drop tq_mutex, we need to @@ -691,7 +729,7 @@ TQ_SLEEP(tq, tq, &tq->tq_mutex, 0, "-", 0); } taskqueue_run_locked(tq); - + tq->tq_curthread = NULL; /* * This thread is on its way out, so just drop the lock temporarily * in order to call the shutdown callback. This allows the callback @@ -715,8 +753,8 @@ tqp = context; tq = *tqp; - - wakeup_one(tq); + if (tq->tq_curthread != curthread) + wakeup_one(tq); } TASKQUEUE_DEFINE(swi, taskqueue_swi_enqueue, NULL, @@ -772,3 +810,334 @@ } return (ret); } + +struct taskqgroup_cpu { + LIST_HEAD(, grouptask) tgc_tasks; + struct taskqueue *tgc_taskq; + int tgc_cnt; + int tgc_cpu; +}; + +struct taskqgroup { + struct taskqgroup_cpu tqg_queue[MAXCPU]; + struct mtx tqg_lock; + char * tqg_name; + int tqg_adjusting; + int tqg_stride; + int tqg_cnt; +}; + +struct taskq_bind_task { + struct task bt_task; + int bt_cpuid; +}; + +static void +taskqgroup_cpu_create(struct taskqgroup *qgroup, int idx) +{ + struct taskqgroup_cpu *qcpu; + + qcpu = &qgroup->tqg_queue[idx]; + LIST_INIT(&qcpu->tgc_tasks); + qcpu->tgc_taskq = taskqueue_create_fast(NULL, M_WAITOK, + taskqueue_thread_enqueue, &qcpu->tgc_taskq); + taskqueue_start_threads(&qcpu->tgc_taskq, 1, PI_SOFT, + "%s_%d", qgroup->tqg_name, idx); + qcpu->tgc_cpu = idx * qgroup->tqg_stride; +} + +static void +taskqgroup_cpu_remove(struct taskqgroup *qgroup, int idx) +{ + + taskqueue_free(qgroup->tqg_queue[idx].tgc_taskq); +} + +/* + * Find the taskq with least # of tasks that doesn't currently have any + * other queues from the uniq identifier. + */ +static int +taskqgroup_find(struct taskqgroup *qgroup, void *uniq) +{ + struct grouptask *n; + int i, idx, mincnt; + int strict; + + mtx_assert(&qgroup->tqg_lock, MA_OWNED); + if (qgroup->tqg_cnt == 0) + return (0); + idx = -1; + mincnt = INT_MAX; + /* + * Two passes; First scan for a queue with the least tasks that + * does not already service this uniq id. If that fails simply find + * the queue with the least total tasks; + */ + for (strict = 1; mincnt == INT_MAX; strict = 0) { + for (i = 0; i < qgroup->tqg_cnt; i++) { + if (qgroup->tqg_queue[i].tgc_cnt > mincnt) + continue; + if (strict) { + LIST_FOREACH(n, + &qgroup->tqg_queue[i].tgc_tasks, gt_list) + if (n->gt_uniq == uniq) + break; + if (n != NULL) + continue; + } + mincnt = qgroup->tqg_queue[i].tgc_cnt; + idx = i; + } + } + if (idx == -1) + panic("taskqgroup_find: Failed to pick a qid."); + + return (idx); +} + +void +taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *gtask, + void *uniq, int irq, char *name) +{ + cpuset_t mask; + int qid; + + gtask->gt_uniq = uniq; + gtask->gt_name = name; + gtask->gt_irq = irq; + gtask->gt_cpu = -1; + mtx_lock(&qgroup->tqg_lock); + qid = taskqgroup_find(qgroup, uniq); + qgroup->tqg_queue[qid].tgc_cnt++; + LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list); + gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq; + if (irq != -1 && smp_started) { + CPU_ZERO(&mask); + CPU_SET(qgroup->tqg_queue[qid].tgc_cpu, &mask); + mtx_unlock(&qgroup->tqg_lock); + intr_setaffinity(irq, &mask); + } else + mtx_unlock(&qgroup->tqg_lock); +} + +int +taskqgroup_attach_cpu(struct taskqgroup *qgroup, struct grouptask *gtask, + void *uniq, int cpu, int irq, char *name) +{ + cpuset_t mask; + int i, qid; + + qid = -1; + gtask->gt_uniq = uniq; + gtask->gt_name = name; + gtask->gt_irq = irq; + gtask->gt_cpu = cpu; + mtx_lock(&qgroup->tqg_lock); + if (smp_started) { + for (i = 0; i < qgroup->tqg_cnt; i++) + if (qgroup->tqg_queue[i].tgc_cpu == cpu) { + qid = i; + break; + } + if (qid == -1) { + mtx_unlock(&qgroup->tqg_lock); + return (EINVAL); + } + } else + qid = 0; + qgroup->tqg_queue[qid].tgc_cnt++; + LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, gt_list); + gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq; + if (irq != -1 && smp_started) { + CPU_ZERO(&mask); + CPU_SET(qgroup->tqg_queue[qid].tgc_cpu, &mask); + mtx_unlock(&qgroup->tqg_lock); + intr_setaffinity(irq, &mask); + } else + mtx_unlock(&qgroup->tqg_lock); + return (0); +} + +void +taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask) +{ + int i; + + mtx_lock(&qgroup->tqg_lock); + for (i = 0; i < qgroup->tqg_cnt; i++) + if (qgroup->tqg_queue[i].tgc_taskq == gtask->gt_taskqueue) + break; + if (i == qgroup->tqg_cnt) + panic("taskqgroup_detach: task not in group\n"); + qgroup->tqg_queue[i].tgc_cnt--; + LIST_REMOVE(gtask, gt_list); + mtx_unlock(&qgroup->tqg_lock); + gtask->gt_taskqueue = NULL; +} + +static void +taskqgroup_binder(void *ctx, int pending) +{ + struct taskq_bind_task *task = (struct taskq_bind_task *)ctx; + cpuset_t mask; + int error; + + CPU_ZERO(&mask); + CPU_SET(task->bt_cpuid, &mask); + error = cpuset_setthread(curthread->td_tid, &mask); + thread_lock(curthread); + sched_bind(curthread, task->bt_cpuid); + thread_unlock(curthread); + + if (error) + printf("taskqgroup_binder: setaffinity failed: %d\n", + error); + free(task, M_DEVBUF); +} + +static void +taskqgroup_bind(struct taskqgroup *qgroup) +{ + struct taskq_bind_task *task; + int i; + + /* + * Bind taskqueue threads to specific CPUs, if they have been assigned + * one. + */ + for (i = 0; i < qgroup->tqg_cnt; i++) { + task = malloc(sizeof (*task), M_DEVBUF, M_NOWAIT); + TASK_INIT(&task->bt_task, 0, taskqgroup_binder, task); + task->bt_cpuid = qgroup->tqg_queue[i].tgc_cpu; + taskqueue_enqueue(qgroup->tqg_queue[i].tgc_taskq, + &task->bt_task); + } +} + +static int +_taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride) +{ + LIST_HEAD(, grouptask) gtask_head = LIST_HEAD_INITIALIZER(NULL); + cpuset_t mask; + struct grouptask *gtask; + int i, old_cnt, qid; + + mtx_assert(&qgroup->tqg_lock, MA_OWNED); + + if (cnt < 1 || cnt * stride > mp_ncpus || !smp_started) { + printf("taskqgroup_adjust failed cnt: %d stride: %d mp_ncpus: %d smp_started: %d\n", + cnt, stride, mp_ncpus, smp_started); + return (EINVAL); + } + if (qgroup->tqg_adjusting) { + printf("taskqgroup_adjust failed: adjusting\n"); + return (EBUSY); + } + qgroup->tqg_adjusting = 1; + old_cnt = qgroup->tqg_cnt; + mtx_unlock(&qgroup->tqg_lock); + /* + * Set up queue for tasks added before boot. + */ + if (old_cnt == 0) { + LIST_SWAP(>ask_head, &qgroup->tqg_queue[0].tgc_tasks, + grouptask, gt_list); + qgroup->tqg_queue[0].tgc_cnt = 0; + } + + /* + * If new taskq threads have been added. + */ + for (i = old_cnt; i < cnt; i++) + taskqgroup_cpu_create(qgroup, i); + mtx_lock(&qgroup->tqg_lock); + qgroup->tqg_cnt = cnt; + qgroup->tqg_stride = stride; + + /* + * Adjust drivers to use new taskqs. + */ + for (i = 0; i < old_cnt; i++) { + while ((gtask = LIST_FIRST(&qgroup->tqg_queue[i].tgc_tasks))) { + LIST_REMOVE(gtask, gt_list); + qgroup->tqg_queue[i].tgc_cnt--; + LIST_INSERT_HEAD(>ask_head, gtask, gt_list); + } + } + + while ((gtask = LIST_FIRST(>ask_head))) { + LIST_REMOVE(gtask, gt_list); + if (gtask->gt_cpu == -1) + qid = taskqgroup_find(qgroup, gtask->gt_uniq); + else { + for (i = 0; i < qgroup->tqg_cnt; i++) + if (qgroup->tqg_queue[i].tgc_cpu == gtask->gt_cpu) { + qid = i; + break; + } + } + qgroup->tqg_queue[qid].tgc_cnt++; + LIST_INSERT_HEAD(&qgroup->tqg_queue[qid].tgc_tasks, gtask, + gt_list); + gtask->gt_taskqueue = qgroup->tqg_queue[qid].tgc_taskq; + } + /* + * Set new CPU and IRQ affinity + */ + for (i = 0; i < cnt; i++) { + qgroup->tqg_queue[i].tgc_cpu = i * qgroup->tqg_stride; + CPU_ZERO(&mask); + CPU_SET(qgroup->tqg_queue[i].tgc_cpu, &mask); + LIST_FOREACH(gtask, &qgroup->tqg_queue[i].tgc_tasks, gt_list) { + if (gtask->gt_irq == -1) + continue; + intr_setaffinity(gtask->gt_irq, &mask); + } + } + mtx_unlock(&qgroup->tqg_lock); + + /* + * If taskq thread count has been reduced. + */ + for (i = cnt; i < old_cnt; i++) + taskqgroup_cpu_remove(qgroup, i); + + mtx_lock(&qgroup->tqg_lock); + qgroup->tqg_adjusting = 0; + + taskqgroup_bind(qgroup); + + return (0); +} + +int +taskqgroup_adjust(struct taskqgroup *qgroup, int cpu, int stride) +{ + int error; + + mtx_lock(&qgroup->tqg_lock); + error = _taskqgroup_adjust(qgroup, cpu, stride); + mtx_unlock(&qgroup->tqg_lock); + + return (error); +} + +struct taskqgroup * +taskqgroup_create(char *name) +{ + struct taskqgroup *qgroup; + + qgroup = malloc(sizeof(*qgroup), M_TASKQUEUE, M_WAITOK | M_ZERO); + mtx_init(&qgroup->tqg_lock, "taskqgroup", NULL, MTX_DEF); + qgroup->tqg_name = name; + LIST_INIT(&qgroup->tqg_queue[0].tgc_tasks); + + return (qgroup); +} + +void +taskqgroup_destroy(struct taskqgroup *qgroup) +{ + +} Index: sys/net/if.c =================================================================== --- sys/net/if.c +++ sys/net/if.c @@ -3885,6 +3885,19 @@ return (count); } +int +if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg) +{ + struct ifmultiaddr *ifma; + int cnt = 0; + + if_maddr_rlock(ifp); + TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) + cnt += filter(arg, ifma, cnt); + if_maddr_runlock(ifp); + return (cnt); +} + struct mbuf * if_dequeue(if_t ifp) { Index: sys/net/if_var.h =================================================================== --- sys/net/if_var.h +++ sys/net/if_var.h @@ -628,6 +628,7 @@ int if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max); int if_multiaddr_count(if_t ifp, int max); +int if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg); int if_getamcount(if_t ifp); struct ifaddr * if_getifaddr(if_t ifp); Index: sys/net/ifdi_if.m =================================================================== --- /dev/null +++ sys/net/ifdi_if.m @@ -0,0 +1,331 @@ +# +# Copyright (c) 2014, Matthew Macy (kmacy@freebsd.org) +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# 1. Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# +# 2. Neither the name of Matthew Macy nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# 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 OWNER 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. + +#include +#include +#include + +#include +#include + +#include +#include +#include +#include +#include + +INTERFACE ifdi; + +CODE { + + static void + null_void_op(if_ctx_t _ctx __unused) + { + } + + static void + null_timer_op(if_ctx_t _ctx __unused, uint16_t _qsidx __unused) + { + } + + static int + null_int_op(if_ctx_t _ctx __unused) + { + return (0); + } + + static void + null_queue_intr_enable(if_ctx_t _ctx __unused, uint16_t _qid __unused) + { + } + + static void + null_led_func(if_ctx_t _ctx __unused, int _onoff __unused) + { + } + + static void + null_vlan_register_op(if_ctx_t _ctx __unused, uint16_t vtag __unused) + { + } + + static int + null_q_setup(if_ctx_t _ctx __unused, uint32_t _qid __unused) + { + return (0); + } + + static int + null_i2c_req(if_ctx_t _sctx __unused, struct ifi2creq *_i2c __unused) + { + return (ENOTSUP); + } + + static int + null_sysctl_int_delay(if_ctx_t _sctx __unused, if_int_delay_info_t _iidi __unused) + { + return (0); + } + + static int + null_iov_init(if_ctx_t _ctx __unused, uint16_t num_vfs __unused, const nvlist_t *params __unused) + { + return (ENOTSUP); + } + + static int + null_vf_add(if_ctx_t _ctx __unused, uint16_t num_vfs __unused, const nvlist_t *params __unused) + { + return (ENOTSUP); + } + + static int + null_priv_ioctl(if_ctx_t _ctx __unused, u_long command, caddr_t *data __unused) + { + return (ENOTSUP); + } +}; + +# +# bus interfaces +# + +METHOD int attach_pre { + if_ctx_t _ctx; +}; + +METHOD int attach_post { + if_ctx_t _ctx; +}; + +METHOD int detach { + if_ctx_t _ctx; +}; + +METHOD int suspend { + if_ctx_t _ctx; +} DEFAULT null_int_op; + +METHOD int shutdown { + if_ctx_t _ctx; +} DEFAULT null_int_op; + +METHOD int resume { + if_ctx_t _ctx; +} DEFAULT null_int_op; + +# +# downcall to driver to allocate its +# own queue state and tie it to the parent +# + +METHOD int tx_queues_alloc { + if_ctx_t _ctx; + caddr_t *_vaddrs; + uint64_t *_paddrs; + int ntxqs; + int ntxqsets; +}; + +METHOD int rx_queues_alloc { + if_ctx_t _ctx; + caddr_t *_vaddrs; + uint64_t *_paddrs; + int nrxqs; + int nrxqsets; +}; + +METHOD void queues_free { + if_ctx_t _ctx; +}; + +# +# interface reset / stop +# + +METHOD void init { + if_ctx_t _ctx; +}; + +METHOD void stop { + if_ctx_t _ctx; +}; + +# +# interrupt setup and manipulation +# + +METHOD int msix_intr_assign { + if_ctx_t _sctx; + int msix; +}; + +METHOD void intr_enable { + if_ctx_t _ctx; +}; + +METHOD void intr_disable { + if_ctx_t _ctx; +}; + +METHOD void queue_intr_enable { + if_ctx_t _ctx; + uint16_t _qid; +} DEFAULT null_queue_intr_enable; + +METHOD void link_intr_enable { + if_ctx_t _ctx; +} DEFAULT null_void_op; + +# +# interface configuration +# + +METHOD void multi_set { + if_ctx_t _ctx; +}; + +METHOD int mtu_set { + if_ctx_t _ctx; + uint32_t _mtu; +}; + +METHOD void media_set{ + if_ctx_t _ctx; +} DEFAULT null_void_op; + +METHOD int promisc_set { + if_ctx_t _ctx; + int _flags; +}; + +METHOD void crcstrip_set { + if_ctx_t _ctx; + int _onoff; +}; + +# +# IOV handling +# + +METHOD void vflr_handle { + if_ctx_t _ctx; +} DEFAULT null_void_op; + +METHOD int iov_init { + if_ctx_t _ctx; + uint16_t num_vfs; + const nvlist_t * params; +} DEFAULT null_iov_init; + +METHOD void iov_uninit { + if_ctx_t _ctx; +} DEFAULT null_void_op; + +METHOD int iov_vf_add { + if_ctx_t _ctx; + uint16_t num_vfs; + const nvlist_t * params; +} DEFAULT null_vf_add; + + +# +# Device status +# + +METHOD void update_admin_status { + if_ctx_t _ctx; +}; + +METHOD void media_status { + if_ctx_t _ctx; + struct ifmediareq *_ifm; +}; + +METHOD int media_change { + if_ctx_t _ctx; +}; + +METHOD uint64_t get_counter { + if_ctx_t _ctx; + ift_counter cnt; +}; + +METHOD int priv_ioctl { + if_ctx_t _ctx; + u_long _cmd; + caddr_t _data; +} DEFAULT null_priv_ioctl; + +# +# optional methods +# + +METHOD int i2c_req { + if_ctx_t _ctx; + struct ifi2creq *_req; +} DEFAULT null_i2c_req; + +METHOD int txq_setup { + if_ctx_t _ctx; + uint32_t _txqid; +} DEFAULT null_q_setup; + +METHOD int rxq_setup { + if_ctx_t _ctx; + uint32_t _txqid; +} DEFAULT null_q_setup; + +METHOD void timer { + if_ctx_t _ctx; + uint16_t _txqid; +} DEFAULT null_timer_op; + +METHOD void watchdog_reset { + if_ctx_t _ctx; +} DEFAULT null_void_op; + +METHOD void led_func { + if_ctx_t _ctx; + int _onoff; +} DEFAULT null_led_func; + +METHOD void vlan_register { + if_ctx_t _ctx; + uint16_t _vtag; +} DEFAULT null_vlan_register_op; + +METHOD void vlan_unregister { + if_ctx_t _ctx; + uint16_t _vtag; +} DEFAULT null_vlan_register_op; + +METHOD int sysctl_int_delay { + if_ctx_t _sctx; + if_int_delay_info_t _iidi; +} DEFAULT null_sysctl_int_delay; + + Index: sys/net/iflib.h =================================================================== --- /dev/null +++ sys/net/iflib.h @@ -0,0 +1,336 @@ +/*- + * Copyright (c) 2014-2015, Matthew Macy (mmacy@nextbsd.org) + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Neither the name of Matthew Macy nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * 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 OWNER 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 __IFLIB_H_ +#define __IFLIB_H_ + +#include +#include +#include +#include +#include +#include + + +/* + * Most cards can handle much larger TSO requests + * but the FreeBSD TCP stack will break on larger + * values + */ +#define FREEBSD_TSO_SIZE_MAX 65518 + + +struct iflib_ctx; +typedef struct iflib_ctx *if_ctx_t; +struct if_shared_ctx; +typedef struct if_shared_ctx *if_shared_ctx_t; +struct if_int_delay_info; +typedef struct if_int_delay_info *if_int_delay_info_t; + +/* + * File organization: + * - public structures + * - iflib accessors + * - iflib utility functions + * - iflib core functions + */ + +typedef struct if_rxd_frag { + uint8_t irf_flid; + uint16_t irf_idx; +} *if_rxd_frag_t; + +typedef struct if_rxd_info { + /* set by iflib */ + uint16_t iri_qsidx; /* qset index */ + uint16_t iri_vtag; /* vlan tag - if flag set */ + uint16_t iri_len; /* packet length */ + uint16_t iri_cidx; /* consumer index of cq */ + struct ifnet *iri_ifp; /* some drivers >1 interface per softc */ + + /* updated by driver */ + uint16_t iri_flags; /* mbuf flags for packet */ + uint32_t iri_flowid; /* RSS hash for packet */ + uint32_t iri_csum_flags; /* m_pkthdr csum flags */ + uint32_t iri_csum_data; /* m_pkthdr csum data */ + uint8_t iri_nfrags; /* number of fragments in packet */ + uint8_t iri_rsstype; /* RSS hash type */ + uint8_t iri_pad; /* any padding in the received data */ + if_rxd_frag_t iri_frags; +} *if_rxd_info_t; + +#define IPI_TX_INTR 0x1 /* send an interrupt when this packet is sent */ +#define IPI_TX_IPV4 0x2 /* ethertype IPv4 */ +#define IPI_TX_IPV6 0x4 /* ethertype IPv6 */ + +typedef struct if_pkt_info { + uint32_t ipi_len; /* packet length */ + bus_dma_segment_t *ipi_segs; /* physical addresses */ + uint16_t ipi_qsidx; /* queue set index */ + uint16_t ipi_nsegs; /* number of segments */ + uint16_t ipi_ndescs; /* number of descriptors used by encap */ + uint16_t ipi_flags; /* iflib per-packet flags */ + uint32_t ipi_pidx; /* start pidx for encap */ + uint32_t ipi_new_pidx; /* next available pidx post-encap */ + /* offload handling */ + uint64_t ipi_csum_flags; /* packet checksum flags */ + uint16_t ipi_tso_segsz; /* tso segment size */ + uint16_t ipi_mflags; /* packet mbuf flags */ + uint16_t ipi_vtag; /* VLAN tag */ + uint16_t ipi_etype; /* ether header type */ + uint8_t ipi_ehdrlen; /* ether header length */ + uint8_t ipi_ip_hlen; /* ip header length */ + uint8_t ipi_tcp_hlen; /* tcp header length */ + uint8_t ipi_tcp_hflags; /* tcp header flags */ + uint8_t ipi_ipproto; /* ip protocol */ + /* implied padding */ + uint32_t ipi_tcp_seq; /* tcp seqno */ + uint32_t ipi_tcp_sum; /* tcp csum */ +} *if_pkt_info_t; + +typedef struct if_irq { + struct resource *ii_res; + int ii_rid; + void *ii_tag; +} *if_irq_t; + +struct if_int_delay_info { + if_ctx_t iidi_ctx; /* Back-pointer to the iflib ctx (softc) */ + int iidi_offset; /* Register offset to read/write */ + int iidi_value; /* Current value in usecs */ + struct sysctl_oid *iidi_oidp; + struct sysctl_req *iidi_req; +}; + +typedef enum { + IFLIB_INTR_LEGACY, + IFLIB_INTR_MSI, + IFLIB_INTR_MSIX +} iflib_intr_mode_t; + +/* + * This really belongs in pciio.h or some place more general + * but this is the only consumer for now. + */ +typedef struct pci_vendor_info { + uint32_t pvi_vendor_id; + uint32_t pvi_device_id; + uint32_t pvi_subvendor_id; + uint32_t pvi_subdevice_id; + uint32_t pvi_rev_id; + uint32_t pvi_class_mask; + caddr_t pvi_name; +} pci_vendor_info_t; + +#define PVID(vendor, devid, name) {vendor, devid, 0, 0, 0, 0, name} +#define PVID_OEM(vendor, devid, svid, sdevid, revid, name) {vendor, devid, svid, sdevid, revid, 0, name} +#define PVID_END {0, 0, 0, 0, 0, 0, NULL} + +typedef struct if_txrx { + int (*ift_txd_encap) (void *, if_pkt_info_t); + void (*ift_txd_flush) (void *, uint16_t, uint32_t); + int (*ift_txd_credits_update) (void *, uint16_t, uint32_t, bool); + + int (*ift_rxd_available) (void *, uint16_t qsidx, uint32_t pidx); + int (*ift_rxd_pkt_get) (void *, if_rxd_info_t ri); + void (*ift_rxd_refill) (void * , uint16_t qsidx, uint8_t flidx, uint32_t pidx, + uint64_t *paddrs, caddr_t *vaddrs, uint16_t count); + void (*ift_rxd_flush) (void *, uint16_t qsidx, uint8_t flidx, uint32_t pidx); + int (*ift_legacy_intr) (void *); +} *if_txrx_t; + +typedef struct if_softc_ctx { + int isc_vectors; + int isc_nrxqsets; + int isc_ntxqsets; + int isc_msix_bar; /* can be model specific - initialize in attach_pre */ + int isc_tx_nsegments; /* can be model specific - initialize in attach_pre */ + int isc_tx_tso_segments_max; + int isc_tx_tso_size_max; + int isc_tx_tso_segsize_max; + int isc_rss_table_size; + int isc_rss_table_mask; + + iflib_intr_mode_t isc_intr; + uint16_t isc_max_frame_size; /* set at init time by driver */ + pci_vendor_info_t isc_vendor_info; /* set by iflib prior to attach_pre */ +} *if_softc_ctx_t; + +/* + * Initialization values for device + */ +struct if_shared_ctx { + int isc_magic; + if_txrx_t isc_txrx; + driver_t *isc_driver; + int isc_ntxd; + int isc_nrxd; + int isc_nfl; + int isc_flags; + bus_size_t isc_q_align; + bus_size_t isc_tx_maxsize; + bus_size_t isc_tx_maxsegsize; + bus_size_t isc_rx_maxsize; + bus_size_t isc_rx_maxsegsize; + int isc_rx_nsegments; + int isc_rx_process_limit; + + + uint32_t isc_txqsizes[8]; + int isc_ntxqs; /* # of tx queues per tx qset - usually 1 */ + uint32_t isc_rxqsizes[8]; + int isc_nrxqs; /* # of rx queues per rx qset - intel 1, chelsio 2, broadcom 3 */ + int isc_admin_intrcnt; /* # of admin/link interrupts */ + + int isc_tx_reclaim_thresh; + + /* fields necessary for probe */ + pci_vendor_info_t *isc_vendor_info; + char *isc_driver_version; +/* optional function to transform the read values to match the table*/ + void (*isc_parse_devinfo) (uint16_t *device_id, uint16_t *subvendor_id, + uint16_t *subdevice_id, uint16_t *rev_id); +}; + +typedef struct iflib_dma_info { + bus_addr_t idi_paddr; + caddr_t idi_vaddr; + bus_dma_tag_t idi_tag; + bus_dmamap_t idi_map; + uint32_t idi_size; +} *iflib_dma_info_t; + +#define IFLIB_MAGIC 0xCAFEF00D + +typedef enum { + IFLIB_INTR_TX, + IFLIB_INTR_RX, + IFLIB_INTR_ADMIN, + IFLIB_INTR_IOV, +} iflib_intr_type_t; + +#ifndef ETH_ADDR_LEN +#define ETH_ADDR_LEN 6 +#endif + + +/* + * Interface has a separate command queue + */ +#define IFLIB_HAS_CQ 0x1 +/* + * Driver has already allocated vectors + */ +#define IFLIB_SKIP_MSIX 0x2 + +/* + * Interface is a virtual function + */ +#define IFLIB_IS_VF 0x4 + + +/* + * field accessors + */ +void *iflib_get_softc(if_ctx_t ctx); + +device_t iflib_get_dev(if_ctx_t ctx); + +if_t iflib_get_ifp(if_ctx_t ctx); + +struct ifmedia *iflib_get_media(if_ctx_t ctx); + +if_softc_ctx_t iflib_get_softc_ctx(if_ctx_t ctx); +if_shared_ctx_t iflib_get_sctx(if_ctx_t ctx); + +void iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]); + + + + +/* + * If the driver can plug cleanly in to newbus use these + */ +int iflib_device_probe(device_t); +int iflib_device_attach(device_t); +int iflib_device_detach(device_t); +int iflib_device_suspend(device_t); +int iflib_device_resume(device_t); +int iflib_device_shutdown(device_t); + + +int iflib_device_iov_init(device_t, uint16_t, const nvlist_t *); +void iflib_device_iov_uninit(device_t); +int iflib_device_iov_add_vf(device_t, uint16_t, const nvlist_t *); + +/* + * If the driver can't plug cleanly in to newbus + * use these + */ +int iflib_device_register(device_t dev, void *softc, if_shared_ctx_t sctx, if_ctx_t *ctxp); +int iflib_device_deregister(if_ctx_t); + + + +int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg, driver_intr_t, void *arg, char *name); +int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, + iflib_intr_type_t type, driver_filter_t *filter, + void *filter_arg, int qid, char *name); +void iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name); + +void iflib_irq_free(if_ctx_t ctx, if_irq_t irq); + +void iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name); + +void iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, + task_fn_t *fn, char *name); + + +void iflib_tx_intr_deferred(if_ctx_t ctx, int txqid); +void iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid); +void iflib_admin_intr_deferred(if_ctx_t ctx); +void iflib_iov_intr_deferred(if_ctx_t ctx); + + +void iflib_link_state_change(if_ctx_t ctx, int linkstate); + +int iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags); +void iflib_dma_free(iflib_dma_info_t dma); + +int iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count); + +void iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count); + + +struct mtx *iflib_ctx_lock_get(if_ctx_t); +struct mtx *iflib_qset_lock_get(if_ctx_t, uint16_t); + +void iflib_led_create(if_ctx_t ctx); + +void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *, + if_int_delay_info_t, int, int); + +#endif /* __IFLIB_H_ */ Index: sys/net/iflib.c =================================================================== --- /dev/null +++ sys/net/iflib.c @@ -0,0 +1,4783 @@ +/*- + * Copyright (c) 2014-2016, Matthew Macy + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Neither the name of Matthew Macy nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * 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 OWNER 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include +#include +#include +#include + +#include + + +#include "opt_inet.h" +#include "opt_inet6.h" +#include "opt_acpi.h" + +#include "ifdi_if.h" + +#if defined(__i386__) || defined(__amd64__) +#include +#include +#include +#include +#include +#include +#endif + + +/* + * enable accounting of every mbuf as it comes in to and goes out of iflib's software descriptor references + */ +#define MEMORY_LOGGING 0 +/* + * Enable mbuf vectors for compressing long mbuf chains + */ + + +/* + * NB: + * - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead + * we prefetch needs to be determined by the time spent in m_free vis a vis + * the cost of a prefetch. This will of course vary based on the workload: + * - NFLX's m_free path is dominated by vm-based M_EXT manipulation which + * is quite expensive, thus suggesting very little prefetch. + * - small packet forwarding which is just returning a single mbuf to + * UMA will typically be very fast vis a vis the cost of a memory + * access. + */ + + +/* + * File organization: + * - private structures + * - iflib private utility functions + * - ifnet functions + * - vlan registry and other exported functions + * - iflib public core functions + * + * + */ +static MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library"); + +struct iflib_txq; +typedef struct iflib_txq *iflib_txq_t; +struct iflib_rxq; +typedef struct iflib_rxq *iflib_rxq_t; +struct iflib_fl; +typedef struct iflib_fl *iflib_fl_t; + +typedef struct iflib_filter_info { + driver_filter_t *ifi_filter; + void *ifi_filter_arg; + struct grouptask *ifi_task; +} *iflib_filter_info_t; + +struct iflib_ctx { + KOBJ_FIELDS; + /* + * Pointer to hardware driver's softc + */ + void *ifc_softc; + device_t ifc_dev; + if_t ifc_ifp; + + cpuset_t ifc_cpus; + if_shared_ctx_t ifc_sctx; + struct if_softc_ctx ifc_softc_ctx; + + struct mtx ifc_mtx; + + uint16_t ifc_nhwtxqs; + uint16_t ifc_nhwrxqs; + + iflib_txq_t ifc_txqs; + iflib_rxq_t ifc_rxqs; + uint32_t ifc_if_flags; + uint32_t ifc_flags; + uint32_t ifc_max_fl_buf_size; + int ifc_in_detach; + + int ifc_link_state; + int ifc_link_irq; + int ifc_pause_frames; + int ifc_watchdog_events; + struct cdev *ifc_led_dev; + struct resource *ifc_msix_mem; + + struct if_irq ifc_legacy_irq; + struct grouptask ifc_admin_task; + struct grouptask ifc_vflr_task; + struct iflib_filter_info ifc_filter_info; + struct ifmedia ifc_media; + + struct sysctl_oid *ifc_sysctl_node; + uint16_t ifc_sysctl_ntxqs; + uint16_t ifc_sysctl_nrxqs; + uint16_t ifc_sysctl_ntxds; + uint16_t ifc_sysctl_nrxds; + struct if_txrx ifc_txrx; +#define isc_txd_encap ifc_txrx.ift_txd_encap +#define isc_txd_flush ifc_txrx.ift_txd_flush +#define isc_txd_credits_update ifc_txrx.ift_txd_credits_update +#define isc_rxd_available ifc_txrx.ift_rxd_available +#define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get +#define isc_rxd_refill ifc_txrx.ift_rxd_refill +#define isc_rxd_flush ifc_txrx.ift_rxd_flush +#define isc_rxd_refill ifc_txrx.ift_rxd_refill +#define isc_rxd_refill ifc_txrx.ift_rxd_refill +#define isc_legacy_intr ifc_txrx.ift_legacy_intr + eventhandler_tag ifc_vlan_attach_event; + eventhandler_tag ifc_vlan_detach_event; + uint8_t ifc_mac[ETHER_ADDR_LEN]; + char ifc_mtx_name[16]; +}; + + +void * +iflib_get_softc(if_ctx_t ctx) +{ + + return (ctx->ifc_softc); +} + +device_t +iflib_get_dev(if_ctx_t ctx) +{ + + return (ctx->ifc_dev); +} + +if_t +iflib_get_ifp(if_ctx_t ctx) +{ + + return (ctx->ifc_ifp); +} + +struct ifmedia * +iflib_get_media(if_ctx_t ctx) +{ + + return (&ctx->ifc_media); +} + +void +iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]) +{ + + bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN); +} + +if_softc_ctx_t +iflib_get_softc_ctx(if_ctx_t ctx) +{ + + return (&ctx->ifc_softc_ctx); +} + +if_shared_ctx_t +iflib_get_sctx(if_ctx_t ctx) +{ + + return (ctx->ifc_sctx); +} + +#define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*)) + +#define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP) +#define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF) + +#define RX_SW_DESC_MAP_CREATED (1 << 0) +#define TX_SW_DESC_MAP_CREATED (1 << 1) +#define RX_SW_DESC_INUSE (1 << 3) +#define TX_SW_DESC_MAPPED (1 << 4) + +typedef struct iflib_sw_rx_desc { + bus_dmamap_t ifsd_map; /* bus_dma map for packet */ + struct mbuf *ifsd_m; /* rx: uninitialized mbuf */ + caddr_t ifsd_cl; /* direct cluster pointer for rx */ + uint16_t ifsd_flags; +} *iflib_rxsd_t; + +typedef struct iflib_sw_tx_desc_val { + bus_dmamap_t ifsd_map; /* bus_dma map for packet */ + struct mbuf *ifsd_m; /* pkthdr mbuf */ + uint8_t ifsd_flags; +} *iflib_txsd_val_t; + +typedef struct iflib_sw_tx_desc_array { + bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */ + struct mbuf **ifsd_m; /* pkthdr mbufs */ + uint8_t *ifsd_flags; +} iflib_txsd_array_t; + + +/* magic number that should be high enough for any hardware */ +#define IFLIB_MAX_TX_SEGS 128 +#define IFLIB_MAX_RX_SEGS 32 +#define IFLIB_RX_COPY_THRESH 128 +#define IFLIB_MAX_RX_REFRESH 32 +#define IFLIB_QUEUE_IDLE 0 +#define IFLIB_QUEUE_HUNG 1 +#define IFLIB_QUEUE_WORKING 2 + +/* this should really scale with ring size - 32 is a fairly arbitrary value for this */ +#define TX_BATCH_SIZE 16 + +#define IFLIB_RESTART_BUDGET 8 + +#define IFC_LEGACY 0x1 +#define IFC_QFLUSH 0x2 +#define IFC_MULTISEG 0x4 +#define IFC_DMAR 0x8 + +#define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \ + CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \ + CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP) +struct iflib_txq { + uint16_t ift_in_use; + uint16_t ift_cidx; + uint16_t ift_cidx_processed; + uint16_t ift_pidx; + uint8_t ift_gen; + uint8_t ift_db_pending; + uint8_t ift_db_pending_queued; + uint8_t ift_npending; + /* implicit pad */ + uint64_t ift_processed; + uint64_t ift_cleaned; +#if MEMORY_LOGGING + uint64_t ift_enqueued; + uint64_t ift_dequeued; +#endif + uint64_t ift_no_tx_dma_setup; + uint64_t ift_no_desc_avail; + uint64_t ift_mbuf_defrag_failed; + uint64_t ift_mbuf_defrag; + uint64_t ift_map_failed; + uint64_t ift_txd_encap_efbig; + uint64_t ift_pullups; + + struct mtx ift_mtx; + struct mtx ift_db_mtx; + + /* constant values */ + if_ctx_t ift_ctx; + struct ifmp_ring **ift_br; + struct grouptask ift_task; + uint16_t ift_size; + uint16_t ift_id; + struct callout ift_timer; + struct callout ift_db_check; + + iflib_txsd_array_t ift_sds; + uint8_t ift_nbr; + uint8_t ift_qstatus; + uint8_t ift_active; + uint8_t ift_closed; + int ift_watchdog_time; + struct iflib_filter_info ift_filter_info; + bus_dma_tag_t ift_desc_tag; + bus_dma_tag_t ift_tso_desc_tag; + iflib_dma_info_t ift_ifdi; +#define MTX_NAME_LEN 16 + char ift_mtx_name[MTX_NAME_LEN]; + char ift_db_mtx_name[MTX_NAME_LEN]; + bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE); +} __aligned(CACHE_LINE_SIZE); + +struct iflib_fl { + uint16_t ifl_cidx; + uint16_t ifl_pidx; + uint16_t ifl_credits; + uint8_t ifl_gen; +#if MEMORY_LOGGING + uint64_t ifl_m_enqueued; + uint64_t ifl_m_dequeued; + uint64_t ifl_cl_enqueued; + uint64_t ifl_cl_dequeued; +#endif + /* implicit pad */ + + /* constant */ + uint16_t ifl_size; + uint16_t ifl_buf_size; + uint16_t ifl_cltype; + uma_zone_t ifl_zone; + iflib_rxsd_t ifl_sds; + iflib_rxq_t ifl_rxq; + uint8_t ifl_id; + bus_dma_tag_t ifl_desc_tag; + iflib_dma_info_t ifl_ifdi; + uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE); + caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH]; +} __aligned(CACHE_LINE_SIZE); + +static inline int +get_inuse(int size, int cidx, int pidx, int gen) +{ + int used; + + if (pidx > cidx) + used = pidx - cidx; + else if (pidx < cidx) + used = size - cidx + pidx; + else if (gen == 0 && pidx == cidx) + used = 0; + else if (gen == 1 && pidx == cidx) + used = size; + else + panic("bad state"); + + return (used); +} + +#define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen)) + +#define IDXDIFF(head, tail, wrap) \ + ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head)) + +struct iflib_rxq { + /* If there is a separate completion queue - + * these are the cq cidx and pidx. Otherwise + * these are unused. + */ + uint16_t ifr_size; + uint16_t ifr_cq_cidx; + uint16_t ifr_cq_pidx; + uint8_t ifr_cq_gen; + + if_ctx_t ifr_ctx; + iflib_fl_t ifr_fl; + uint64_t ifr_rx_irq; + uint16_t ifr_id; + uint8_t ifr_lro_enabled; + uint8_t ifr_nfl; + struct lro_ctrl ifr_lc; + struct grouptask ifr_task; + struct iflib_filter_info ifr_filter_info; + iflib_dma_info_t ifr_ifdi; + /* dynamically allocate if any drivers need a value substantially larger than this */ + struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE); +} __aligned(CACHE_LINE_SIZE); + +/* + * Only allow a single packet to take up most 1/nth of the tx ring + */ +#define MAX_SINGLE_PACKET_FRACTION 12 +#define IF_BAD_DMA (bus_addr_t)-1 + +static int enable_msix = 1; + +#define mtx_held(m) (((m)->mtx_lock & ~MTX_FLAGMASK) != (uintptr_t)0) + + + +#define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING)) + +#define CTX_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_mtx, _name, "iflib ctx lock", MTX_DEF) + +#define CTX_LOCK(ctx) mtx_lock(&(ctx)->ifc_mtx) +#define CTX_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_mtx) +#define CTX_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_mtx) + + +#define TXDB_LOCK_INIT(txq) mtx_init(&(txq)->ift_db_mtx, (txq)->ift_db_mtx_name, NULL, MTX_DEF) +#define TXDB_TRYLOCK(txq) mtx_trylock(&(txq)->ift_db_mtx) +#define TXDB_LOCK(txq) mtx_lock(&(txq)->ift_db_mtx) +#define TXDB_UNLOCK(txq) mtx_unlock(&(txq)->ift_db_mtx) +#define TXDB_LOCK_DESTROY(txq) mtx_destroy(&(txq)->ift_db_mtx) + +#define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx) +#define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx) + + +/* Our boot-time initialization hook */ +static int iflib_module_event_handler(module_t, int, void *); + +static moduledata_t iflib_moduledata = { + "iflib", + iflib_module_event_handler, + NULL +}; + +DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY); +MODULE_VERSION(iflib, 1); + +MODULE_DEPEND(iflib, pci, 1, 1, 1); +MODULE_DEPEND(iflib, ether, 1, 1, 1); + +TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1); +TASKQGROUP_DEFINE(if_config_tqg, 1, 1); + +#ifndef IFLIB_DEBUG_COUNTERS +#ifdef INVARIANTS +#define IFLIB_DEBUG_COUNTERS 1 +#else +#define IFLIB_DEBUG_COUNTERS 0 +#endif /* !INVARIANTS */ +#endif + +static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0, + "iflib driver parameters"); + +/* + * XXX need to ensure that this can't accidentally cause the head to be moved backwards + */ +static int iflib_min_tx_latency = 0; + +SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW, + &iflib_min_tx_latency, 0, "minimize transmit latency at the possibel expense of throughput"); + + +#if IFLIB_DEBUG_COUNTERS + +static int iflib_tx_seen; +static int iflib_tx_sent; +static int iflib_tx_encap; +static int iflib_rx_allocs; +static int iflib_fl_refills; +static int iflib_fl_refills_large; +static int iflib_tx_frees; + +SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD, + &iflib_tx_seen, 0, "# tx mbufs seen"); +SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD, + &iflib_tx_sent, 0, "# tx mbufs sent"); +SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD, + &iflib_tx_encap, 0, "# tx mbufs encapped"); +SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD, + &iflib_tx_frees, 0, "# tx frees"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD, + &iflib_rx_allocs, 0, "# rx allocations"); +SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD, + &iflib_fl_refills, 0, "# refills"); +SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD, + &iflib_fl_refills_large, 0, "# large refills"); + + +static int iflib_txq_drain_flushing; +static int iflib_txq_drain_oactive; +static int iflib_txq_drain_notready; +static int iflib_txq_drain_encapfail; + +SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD, + &iflib_txq_drain_flushing, 0, "# drain flushes"); +SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD, + &iflib_txq_drain_oactive, 0, "# drain oactives"); +SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD, + &iflib_txq_drain_notready, 0, "# drain notready"); +SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_encapfail, CTLFLAG_RD, + &iflib_txq_drain_encapfail, 0, "# drain encap fails"); + + +static int iflib_encap_load_mbuf_fail; +static int iflib_encap_txq_avail_fail; +static int iflib_encap_txd_encap_fail; + +SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD, + &iflib_encap_load_mbuf_fail, 0, "# busdma load failures"); +SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD, + &iflib_encap_txq_avail_fail, 0, "# txq avail failures"); +SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD, + &iflib_encap_txd_encap_fail, 0, "# driver encap failures"); + +static int iflib_task_fn_rxs; +static int iflib_rx_intr_enables; +static int iflib_fast_intrs; +static int iflib_intr_link; +static int iflib_intr_msix; +static int iflib_rx_unavail; +static int iflib_rx_ctx_inactive; +static int iflib_rx_zero_len; +static int iflib_rx_if_input; +static int iflib_rx_mbuf_null; +static int iflib_rxd_flush; + +static int iflib_verbose_debug; + +SYSCTL_INT(_net_iflib, OID_AUTO, intr_link, CTLFLAG_RD, + &iflib_intr_link, 0, "# intr link calls"); +SYSCTL_INT(_net_iflib, OID_AUTO, intr_msix, CTLFLAG_RD, + &iflib_intr_msix, 0, "# intr msix calls"); +SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD, + &iflib_task_fn_rxs, 0, "# task_fn_rx calls"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD, + &iflib_rx_intr_enables, 0, "# rx intr enables"); +SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD, + &iflib_fast_intrs, 0, "# fast_intr calls"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD, + &iflib_rx_unavail, 0, "# times rxeof called with no available data"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD, + &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_zero_len, CTLFLAG_RD, + &iflib_rx_zero_len, 0, "# times rxeof saw zero len mbuf"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD, + &iflib_rx_if_input, 0, "# times rxeof called if_input"); +SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD, + &iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf"); +SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD, + &iflib_rxd_flush, 0, "# times rxd_flush called"); +SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW, + &iflib_verbose_debug, 0, "enable verbose debugging"); + +#define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1) + +#else +#define DBG_COUNTER_INC(name) + +#endif + + + +#define IFLIB_DEBUG 0 + +static void iflib_tx_structures_free(if_ctx_t ctx); +static void iflib_rx_structures_free(if_ctx_t ctx); +static int iflib_queues_alloc(if_ctx_t ctx); +static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq); +static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx); +static int iflib_qset_structures_setup(if_ctx_t ctx); +static int iflib_msix_init(if_ctx_t ctx); +static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, char *str); +static void iflib_txq_check_drain(iflib_txq_t txq, int budget); +static uint32_t iflib_txq_can_drain(struct ifmp_ring *); +static int iflib_register(if_ctx_t); +static void iflib_init_locked(if_ctx_t ctx); +static void iflib_add_device_sysctl_pre(if_ctx_t ctx); +static void iflib_add_device_sysctl_post(if_ctx_t ctx); + + +#ifdef DEV_NETMAP +#include +#include +#include + +MODULE_DEPEND(iflib, netmap, 1, 1, 1); + +/* + * device-specific sysctl variables: + * + * ixl_crcstrip: 0: keep CRC in rx frames (default), 1: strip it. + * During regular operations the CRC is stripped, but on some + * hardware reception of frames not multiple of 64 is slower, + * so using crcstrip=0 helps in benchmarks. + * + * ixl_rx_miss, ixl_rx_miss_bufs: + * count packets that might be missed due to lost interrupts. + */ +SYSCTL_DECL(_dev_netmap); +/* + * The xl driver by default strips CRCs and we do not override it. + */ + +int iflib_crcstrip = 1; +SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip, + CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on rx frames"); + +int iflib_rx_miss, iflib_rx_miss_bufs; +SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss, + CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed rx intr"); +SYSCTL_INT(_dev_netmap, OID_AUTO, ixl_rx_miss_bufs, + CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed rx intr bufs"); + +/* + * Register/unregister. We are already under netmap lock. + * Only called on the first register or the last unregister. + */ +static int +iflib_netmap_register(struct netmap_adapter *na, int onoff) +{ + struct ifnet *ifp = na->ifp; + if_ctx_t ctx = ifp->if_softc; + + CTX_LOCK(ctx); + IFDI_INTR_DISABLE(ctx); + + /* Tell the stack that the interface is no longer active */ + ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); + + if (!CTX_IS_VF(ctx)) + IFDI_CRCSTRIP_SET(ctx, onoff); + + /* enable or disable flags and callbacks in na and ifp */ + if (onoff) { + nm_set_native_flags(na); + } else { + nm_clear_native_flags(na); + } + IFDI_INIT(ctx); + IFDI_CRCSTRIP_SET(ctx, onoff); // XXX why twice ? + CTX_UNLOCK(ctx); + return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); +} + +/* + * Reconcile kernel and user view of the transmit ring. + * + * All information is in the kring. + * Userspace wants to send packets up to the one before kring->rhead, + * kernel knows kring->nr_hwcur is the first unsent packet. + * + * Here we push packets out (as many as possible), and possibly + * reclaim buffers from previously completed transmission. + * + * The caller (netmap) guarantees that there is only one instance + * running at any time. Any interference with other driver + * methods should be handled by the individual drivers. + */ +static int +iflib_netmap_txsync(struct netmap_kring *kring, int flags) +{ + struct netmap_adapter *na = kring->na; + struct ifnet *ifp = na->ifp; + struct netmap_ring *ring = kring->ring; + u_int nm_i; /* index into the netmap ring */ + u_int nic_i; /* index into the NIC ring */ + u_int n; + u_int const lim = kring->nkr_num_slots - 1; + u_int const head = kring->rhead; + struct if_pkt_info pi; + + /* + * interrupts on every tx packet are expensive so request + * them every half ring, or where NS_REPORT is set + */ + u_int report_frequency = kring->nkr_num_slots >> 1; + /* device-specific */ + if_ctx_t ctx = ifp->if_softc; + iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id]; + + pi.ipi_segs = txq->ift_segs; + pi.ipi_qsidx = kring->ring_id; + pi.ipi_ndescs = 0; + + bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + + + /* + * First part: process new packets to send. + * nm_i is the current index in the netmap ring, + * nic_i is the corresponding index in the NIC ring. + * + * If we have packets to send (nm_i != head) + * iterate over the netmap ring, fetch length and update + * the corresponding slot in the NIC ring. Some drivers also + * need to update the buffer's physical address in the NIC slot + * even NS_BUF_CHANGED is not set (PNMB computes the addresses). + * + * The netmap_reload_map() calls is especially expensive, + * even when (as in this case) the tag is 0, so do only + * when the buffer has actually changed. + * + * If possible do not set the report/intr bit on all slots, + * but only a few times per ring or when NS_REPORT is set. + * + * Finally, on 10G and faster drivers, it might be useful + * to prefetch the next slot and txr entry. + */ + + nm_i = kring->nr_hwcur; + if (nm_i != head) { /* we have new packets to send */ + nic_i = netmap_idx_k2n(kring, nm_i); + + __builtin_prefetch(&ring->slot[nm_i]); + __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]); + __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]); + + for (n = 0; nm_i != head; n++) { + struct netmap_slot *slot = &ring->slot[nm_i]; + u_int len = slot->len; + uint64_t paddr; + void *addr = PNMB(na, slot, &paddr); + int flags = (slot->flags & NS_REPORT || + nic_i == 0 || nic_i == report_frequency) ? + IPI_TX_INTR : 0; + + /* device-specific */ + pi.ipi_pidx = nic_i; + pi.ipi_flags = flags; + + /* Fill the slot in the NIC ring. */ + ctx->isc_txd_encap(ctx->ifc_softc, &pi); + + /* prefetch for next round */ + __builtin_prefetch(&ring->slot[nm_i + 1]); + __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]); + __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]); + + NM_CHECK_ADDR_LEN(na, addr, len); + + if (slot->flags & NS_BUF_CHANGED) { + /* buffer has changed, reload map */ + netmap_reload_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[nic_i], addr); + } + slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); + + /* make sure changes to the buffer are synced */ + bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_sds.ifsd_map[nic_i], + BUS_DMASYNC_PREWRITE); + + nm_i = nm_next(nm_i, lim); + nic_i = nm_next(nic_i, lim); + } + kring->nr_hwcur = head; + + /* synchronize the NIC ring */ + bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + /* (re)start the tx unit up to slot nic_i (excluded) */ + ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i); + } + + /* + * Second part: reclaim buffers for completed transmissions. + */ + if (iflib_tx_credits_update(ctx, txq)) { + /* some tx completed, increment avail */ + nic_i = txq->ift_cidx_processed; + kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); + } + return (0); +} + +/* + * Reconcile kernel and user view of the receive ring. + * Same as for the txsync, this routine must be efficient. + * The caller guarantees a single invocations, but races against + * the rest of the driver should be handled here. + * + * On call, kring->rhead is the first packet that userspace wants + * to keep, and kring->rcur is the wakeup point. + * The kernel has previously reported packets up to kring->rtail. + * + * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective + * of whether or not we received an interrupt. + */ +static int +iflib_netmap_rxsync(struct netmap_kring *kring, int flags) +{ + struct netmap_adapter *na = kring->na; + struct ifnet *ifp = na->ifp; + struct netmap_ring *ring = kring->ring; + u_int nm_i; /* index into the netmap ring */ + u_int nic_i; /* index into the NIC ring */ + u_int i, n; + u_int const lim = kring->nkr_num_slots - 1; + u_int const head = kring->rhead; + int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; + struct if_rxd_info ri; + /* device-specific */ + if_ctx_t ctx = ifp->if_softc; + iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id]; + iflib_fl_t fl = rxq->ifr_fl; + if (head > lim) + return netmap_ring_reinit(kring); + + bzero(&ri, sizeof(ri)); + ri.iri_qsidx = kring->ring_id; + ri.iri_ifp = ctx->ifc_ifp; + /* XXX check sync modes */ + for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) + bus_dmamap_sync(rxq->ifr_fl[i].ifl_desc_tag, fl->ifl_ifdi->idi_map, + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + + /* + * First part: import newly received packets. + * + * nm_i is the index of the next free slot in the netmap ring, + * nic_i is the index of the next received packet in the NIC ring, + * and they may differ in case if_init() has been called while + * in netmap mode. For the receive ring we have + * + * nic_i = rxr->next_check; + * nm_i = kring->nr_hwtail (previous) + * and + * nm_i == (nic_i + kring->nkr_hwofs) % ring_size + * + * rxr->next_check is set to 0 on a ring reinit + */ + if (netmap_no_pendintr || force_update) { + int crclen = iflib_crcstrip ? 0 : 4; + int error, avail; + uint16_t slot_flags = kring->nkr_slot_flags; + + for (fl = rxq->ifr_fl, i = 0; i < rxq->ifr_nfl; i++, fl++) { + nic_i = fl->ifl_cidx; + nm_i = netmap_idx_n2k(kring, nic_i); + avail = ctx->isc_rxd_available(ctx->ifc_softc, kring->ring_id, nic_i); + for (n = 0; avail > 0; n++, avail--) { + error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); + if (error) + ring->slot[nm_i].len = 0; + else + ring->slot[nm_i].len = ri.iri_len - crclen; + ring->slot[nm_i].flags = slot_flags; + bus_dmamap_sync(fl->ifl_ifdi->idi_tag, + fl->ifl_sds[nic_i].ifsd_map, BUS_DMASYNC_POSTREAD); + nm_i = nm_next(nm_i, lim); + nic_i = nm_next(nic_i, lim); + } + if (n) { /* update the state variables */ + if (netmap_no_pendintr && !force_update) { + /* diagnostics */ + iflib_rx_miss ++; + iflib_rx_miss_bufs += n; + } + fl->ifl_cidx = nic_i; + kring->nr_hwtail = nm_i; + } + kring->nr_kflags &= ~NKR_PENDINTR; + } + } + /* + * Second part: skip past packets that userspace has released. + * (kring->nr_hwcur to head excluded), + * and make the buffers available for reception. + * As usual nm_i is the index in the netmap ring, + * nic_i is the index in the NIC ring, and + * nm_i == (nic_i + kring->nkr_hwofs) % ring_size + */ + /* XXX not sure how this will work with multiple free lists */ + nm_i = kring->nr_hwcur; + if (nm_i != head) { + nic_i = netmap_idx_k2n(kring, nm_i); + for (n = 0; nm_i != head; n++) { + struct netmap_slot *slot = &ring->slot[nm_i]; + uint64_t paddr; + caddr_t vaddr; + void *addr = PNMB(na, slot, &paddr); + + if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ + goto ring_reset; + + vaddr = addr; + if (slot->flags & NS_BUF_CHANGED) { + /* buffer has changed, reload map */ + netmap_reload_map(na, fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, addr); + slot->flags &= ~NS_BUF_CHANGED; + } + /* + * XXX we should be batching this operation - TODO + */ + ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i, &paddr, &vaddr, 1); + bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, + BUS_DMASYNC_PREREAD); + nm_i = nm_next(nm_i, lim); + nic_i = nm_next(nic_i, lim); + } + kring->nr_hwcur = head; + + bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + /* + * IMPORTANT: we must leave one free slot in the ring, + * so move nic_i back by one unit + */ + nic_i = nm_prev(nic_i, lim); + ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i); + } + + return 0; + +ring_reset: + return netmap_ring_reinit(kring); +} + +static int +iflib_netmap_attach(if_ctx_t ctx) +{ + struct netmap_adapter na; + + bzero(&na, sizeof(na)); + + na.ifp = ctx->ifc_ifp; + na.na_flags = NAF_BDG_MAYSLEEP; + MPASS(ctx->ifc_softc_ctx.isc_ntxqsets); + MPASS(ctx->ifc_softc_ctx.isc_nrxqsets); + + na.num_tx_desc = ctx->ifc_sctx->isc_ntxd; + na.num_rx_desc = ctx->ifc_sctx->isc_ntxd; + na.nm_txsync = iflib_netmap_txsync; + na.nm_rxsync = iflib_netmap_rxsync; + na.nm_register = iflib_netmap_register; + na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets; + na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets; + return (netmap_attach(&na)); +} + +static void +iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq) +{ + struct netmap_adapter *na = NA(ctx->ifc_ifp); + struct netmap_slot *slot; + + slot = netmap_reset(na, NR_TX, txq->ift_id, 0); + if (slot == 0) + return; + + for (int i = 0; i < ctx->ifc_sctx->isc_ntxd; i++) { + + /* + * In netmap mode, set the map for the packet buffer. + * NOTE: Some drivers (not this one) also need to set + * the physical buffer address in the NIC ring. + * netmap_idx_n2k() maps a nic index, i, into the corresponding + * netmap slot index, si + */ + int si = netmap_idx_n2k(&na->tx_rings[txq->ift_id], i); + netmap_load_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[i], NMB(na, slot + si)); + } +} +static void +iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq) +{ + struct netmap_adapter *na = NA(ctx->ifc_ifp); + struct netmap_slot *slot; + iflib_rxsd_t sd; + int nrxd; + + slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0); + if (slot == 0) + return; + sd = rxq->ifr_fl[0].ifl_sds; + nrxd = ctx->ifc_sctx->isc_nrxd; + for (int i = 0; i < nrxd; i++, sd++) { + int sj = netmap_idx_n2k(&na->rx_rings[rxq->ifr_id], i); + uint64_t paddr; + void *addr; + caddr_t vaddr; + + vaddr = addr = PNMB(na, slot + sj, &paddr); + netmap_load_map(na, rxq->ifr_fl[0].ifl_ifdi->idi_tag, sd->ifsd_map, addr); + /* Update descriptor and the cached value */ + ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, i, &paddr, &vaddr, 1); + } + /* preserve queue */ + if (ctx->ifc_ifp->if_capenable & IFCAP_NETMAP) { + struct netmap_kring *kring = &na->rx_rings[rxq->ifr_id]; + int t = na->num_rx_desc - 1 - nm_kr_rxspace(kring); + ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, t); + } else + ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, nrxd-1); +} + +#define iflib_netmap_detach(ifp) netmap_detach(ifp) + +#else +#define iflib_netmap_txq_init(ctx, txq) +#define iflib_netmap_rxq_init(ctx, rxq) +#define iflib_netmap_detach(ifp) + +#define iflib_netmap_attach(ctx) (0) +#define netmap_rx_irq(ifp, qid, budget) (0) + +#endif + +#if defined(__i386__) || defined(__amd64__) +static __inline void +prefetch(void *x) +{ + __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); +} +#else +#define prefetch(x) +#endif + +static void +_iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) +{ + if (err) + return; + *(bus_addr_t *) arg = segs[0].ds_addr; +} + +int +iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags) +{ + int err; + if_shared_ctx_t sctx = ctx->ifc_sctx; + device_t dev = ctx->ifc_dev; + + KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized")); + + err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ + sctx->isc_q_align, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + size, /* maxsize */ + 1, /* nsegments */ + size, /* maxsegsize */ + BUS_DMA_ALLOCNOW, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockarg */ + &dma->idi_tag); + if (err) { + device_printf(dev, + "%s: bus_dma_tag_create failed: %d\n", + __func__, err); + goto fail_0; + } + + err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr, + BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map); + if (err) { + device_printf(dev, + "%s: bus_dmamem_alloc(%ju) failed: %d\n", + __func__, (uintmax_t)size, err); + goto fail_1; + } + + dma->idi_paddr = IF_BAD_DMA; + err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr, + size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT); + if (err || dma->idi_paddr == IF_BAD_DMA) { + device_printf(dev, + "%s: bus_dmamap_load failed: %d\n", + __func__, err); + goto fail_2; + } + + dma->idi_size = size; + return (0); + +fail_2: + bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); +fail_1: + bus_dma_tag_destroy(dma->idi_tag); +fail_0: + dma->idi_tag = NULL; + + return (err); +} + +int +iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count) +{ + int i, err; + iflib_dma_info_t *dmaiter; + + dmaiter = dmalist; + for (i = 0; i < count; i++, dmaiter++) { + if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0) + break; + } + if (err) + iflib_dma_free_multi(dmalist, i); + return (err); +} + +void +iflib_dma_free(iflib_dma_info_t dma) +{ + if (dma->idi_tag == NULL) + return; + if (dma->idi_paddr != IF_BAD_DMA) { + bus_dmamap_sync(dma->idi_tag, dma->idi_map, + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(dma->idi_tag, dma->idi_map); + dma->idi_paddr = IF_BAD_DMA; + } + if (dma->idi_vaddr != NULL) { + bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); + dma->idi_vaddr = NULL; + } + bus_dma_tag_destroy(dma->idi_tag); + dma->idi_tag = NULL; +} + +void +iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count) +{ + int i; + iflib_dma_info_t *dmaiter = dmalist; + + for (i = 0; i < count; i++, dmaiter++) + iflib_dma_free(*dmaiter); +} + +static int +iflib_fast_intr(void *arg) +{ + iflib_filter_info_t info = arg; + struct grouptask *gtask = info->ifi_task; + + DBG_COUNTER_INC(fast_intrs); + if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) + return (FILTER_HANDLED); + + GROUPTASK_ENQUEUE(gtask); + return (FILTER_HANDLED); +} + +static int +_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, + driver_filter_t filter, driver_intr_t handler, void *arg, + char *name) +{ + int rc; + struct resource *res; + void *tag; + device_t dev = ctx->ifc_dev; + + MPASS(rid < 512); + irq->ii_rid = rid; + res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid, + RF_SHAREABLE | RF_ACTIVE); + if (res == NULL) { + device_printf(dev, + "failed to allocate IRQ for rid %d, name %s.\n", rid, name); + return (ENOMEM); + } + irq->ii_res = res; + KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL")); + rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET, + filter, handler, arg, &tag); + if (rc != 0) { + device_printf(dev, + "failed to setup interrupt for rid %d, name %s: %d\n", + rid, name ? name : "unknown", rc); + return (rc); + } else if (name) + bus_describe_intr(dev, res, tag, name); + + irq->ii_tag = tag; + return (0); +} + + +/********************************************************************* + * + * Allocate memory for tx_buffer structures. The tx_buffer stores all + * the information needed to transmit a packet on the wire. This is + * called only once at attach, setup is done every reset. + * + **********************************************************************/ + +static int +iflib_txsd_alloc(iflib_txq_t txq) +{ + if_ctx_t ctx = txq->ift_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; + device_t dev = ctx->ifc_dev; + int err, nsegments, ntsosegments; + + nsegments = scctx->isc_tx_nsegments; + ntsosegments = scctx->isc_tx_tso_segments_max; + MPASS(sctx->isc_ntxd > 0); + MPASS(nsegments > 0); + MPASS(ntsosegments > 0); + /* + * Setup DMA descriptor areas. + */ + if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), + 1, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + sctx->isc_tx_maxsize, /* maxsize */ + nsegments, /* nsegments */ + sctx->isc_tx_maxsegsize, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockfuncarg */ + &txq->ift_desc_tag))) { + device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err); + device_printf(dev,"maxsize: %zd nsegments: %d maxsegsize: %zd\n", + sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize); + goto fail; + } +#ifdef INVARIANTS + device_printf(dev,"maxsize: %zd nsegments: %d maxsegsize: %zd\n", + sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize); +#endif + device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n", + scctx->isc_tx_tso_size_max, ntsosegments, + scctx->isc_tx_tso_segsize_max); + if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), + 1, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + scctx->isc_tx_tso_size_max, /* maxsize */ + ntsosegments, /* nsegments */ + scctx->isc_tx_tso_segsize_max, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockfuncarg */ + &txq->ift_tso_desc_tag))) { + device_printf(dev,"Unable to allocate TX TSO DMA tag: %d\n", err); + + goto fail; + } +#ifdef INVARIANTS + device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n", + scctx->isc_tx_tso_size_max, ntsosegments, + scctx->isc_tx_tso_segsize_max); +#endif + if (!(txq->ift_sds.ifsd_flags = + (uint8_t *) malloc(sizeof(uint8_t) * + sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate tx_buffer memory\n"); + err = ENOMEM; + goto fail; + } + if (!(txq->ift_sds.ifsd_m = + (struct mbuf **) malloc(sizeof(struct mbuf *) * + sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate tx_buffer memory\n"); + err = ENOMEM; + goto fail; + } + + /* Create the descriptor buffer dma maps */ +#if defined(ACPI_DMAR) || (!(defined(__i386__) && !defined(__amd64__))) + if ((ctx->ifc_flags & IFC_DMAR) == 0) + return (0); + + if (!(txq->ift_sds.ifsd_map = + (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate tx_buffer map memory\n"); + err = ENOMEM; + goto fail; + } + + for (int i = 0; i < sctx->isc_ntxd; i++) { + err = bus_dmamap_create(txq->ift_desc_tag, 0, &txq->ift_sds.ifsd_map[i]); + if (err != 0) { + device_printf(dev, "Unable to create TX DMA map\n"); + goto fail; + } + } +#endif + return (0); +fail: + /* We free all, it handles case where we are in the middle */ + iflib_tx_structures_free(ctx); + return (err); +} + +static void +iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i) +{ + bus_dmamap_t map; + + map = NULL; + if (txq->ift_sds.ifsd_map != NULL) + map = txq->ift_sds.ifsd_map[i]; + if (map != NULL) { + bus_dmamap_unload(txq->ift_desc_tag, map); + bus_dmamap_destroy(txq->ift_desc_tag, map); + txq->ift_sds.ifsd_map[i] = NULL; + } +} + +static void +iflib_txq_destroy(iflib_txq_t txq) +{ + if_ctx_t ctx = txq->ift_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + + for (int i = 0; i < sctx->isc_ntxd; i++) + iflib_txsd_destroy(ctx, txq, i); + if (txq->ift_sds.ifsd_map != NULL) { + free(txq->ift_sds.ifsd_map, M_IFLIB); + txq->ift_sds.ifsd_map = NULL; + } + if (txq->ift_sds.ifsd_m != NULL) { + free(txq->ift_sds.ifsd_m, M_IFLIB); + txq->ift_sds.ifsd_m = NULL; + } + if (txq->ift_sds.ifsd_flags != NULL) { + free(txq->ift_sds.ifsd_flags, M_IFLIB); + txq->ift_sds.ifsd_flags = NULL; + } + if (txq->ift_desc_tag != NULL) { + bus_dma_tag_destroy(txq->ift_desc_tag); + txq->ift_desc_tag = NULL; + } + if (txq->ift_tso_desc_tag != NULL) { + bus_dma_tag_destroy(txq->ift_tso_desc_tag); + txq->ift_tso_desc_tag = NULL; + } +} + +static void +iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i) +{ + struct mbuf **mp; + + mp = &txq->ift_sds.ifsd_m[i]; + if (*mp == NULL) + return; + + if (txq->ift_sds.ifsd_map != NULL) { + bus_dmamap_sync(txq->ift_desc_tag, + txq->ift_sds.ifsd_map[i], + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(txq->ift_desc_tag, + txq->ift_sds.ifsd_map[i]); + } + m_freem(*mp); + DBG_COUNTER_INC(tx_frees); + *mp = NULL; +} + +static int +iflib_txq_setup(iflib_txq_t txq) +{ + if_ctx_t ctx = txq->ift_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + iflib_dma_info_t di; + int i; + + /* Set number of descriptors available */ + txq->ift_qstatus = IFLIB_QUEUE_IDLE; + + /* Reset indices */ + txq->ift_cidx_processed = txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0; + txq->ift_size = sctx->isc_ntxd; + + for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) + bzero((void *)di->idi_vaddr, di->idi_size); + + IFDI_TXQ_SETUP(ctx, txq->ift_id); + for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) + bus_dmamap_sync(di->idi_tag, di->idi_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + return (0); +} + +/********************************************************************* + * + * Allocate memory for rx_buffer structures. Since we use one + * rx_buffer per received packet, the maximum number of rx_buffer's + * that we'll need is equal to the number of receive descriptors + * that we've allocated. + * + **********************************************************************/ +static int +iflib_rxsd_alloc(iflib_rxq_t rxq) +{ + if_ctx_t ctx = rxq->ifr_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + device_t dev = ctx->ifc_dev; + iflib_fl_t fl; + iflib_rxsd_t rxsd; + int err; + + MPASS(sctx->isc_nrxd > 0); + + fl = rxq->ifr_fl; + for (int i = 0; i < rxq->ifr_nfl; i++, fl++) { + fl->ifl_sds = malloc(sizeof(struct iflib_sw_rx_desc) * + sctx->isc_nrxd, M_IFLIB, M_WAITOK | M_ZERO); + if (fl->ifl_sds == NULL) { + device_printf(dev, "Unable to allocate rx sw desc memory\n"); + return (ENOMEM); + } + fl->ifl_size = sctx->isc_nrxd; /* this isn't necessarily the same */ + err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ + 1, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + sctx->isc_rx_maxsize, /* maxsize */ + sctx->isc_rx_nsegments, /* nsegments */ + sctx->isc_rx_maxsegsize, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockarg */ + &fl->ifl_desc_tag); + if (err) { + device_printf(dev, "%s: bus_dma_tag_create failed %d\n", + __func__, err); + goto fail; + } + + rxsd = fl->ifl_sds; + for (int i = 0; i < sctx->isc_nrxd; i++, rxsd++) { + err = bus_dmamap_create(fl->ifl_desc_tag, 0, &rxsd->ifsd_map); + if (err) { + device_printf(dev, "%s: bus_dmamap_create failed: %d\n", + __func__, err); + goto fail; + } + } + } + return (0); + +fail: + iflib_rx_structures_free(ctx); + return (err); +} + + +/* + * Internal service routines + */ + +struct rxq_refill_cb_arg { + int error; + bus_dma_segment_t seg; + int nseg; +}; + +static void +_rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) +{ + struct rxq_refill_cb_arg *cb_arg = arg; + + cb_arg->error = error; + cb_arg->seg = segs[0]; + cb_arg->nseg = nseg; +} + + +#ifdef ACPI_DMAR +#define IS_DMAR(ctx) (ctx->ifc_flags & IFC_DMAR) +#else +#define IS_DMAR(ctx) (0) +#endif + +/** + * rxq_refill - refill an rxq free-buffer list + * @ctx: the iflib context + * @rxq: the free-list to refill + * @n: the number of new buffers to allocate + * + * (Re)populate an rxq free-buffer list with up to @n new packet buffers. + * The caller must assure that @n does not exceed the queue's capacity. + */ +static void +_iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count) +{ + struct mbuf *m; + int pidx = fl->ifl_pidx; + iflib_rxsd_t rxsd = &fl->ifl_sds[pidx]; + caddr_t cl; + int n, i = 0; + uint64_t bus_addr; + int err; + + n = count; + MPASS(n > 0); + MPASS(fl->ifl_credits >= 0); + MPASS(fl->ifl_credits + n <= fl->ifl_size); + + if (pidx < fl->ifl_cidx) + MPASS(pidx + n <= fl->ifl_cidx); + if (pidx == fl->ifl_cidx && (fl->ifl_credits < fl->ifl_size)) + MPASS(fl->ifl_gen == 0); + if (pidx > fl->ifl_cidx) + MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx); + + DBG_COUNTER_INC(fl_refills); + if (n > 8) + DBG_COUNTER_INC(fl_refills_large); + + while (n--) { + /* + * We allocate an uninitialized mbuf + cluster, mbuf is + * initialized after rx. + * + * If the cluster is still set then we know a minimum sized packet was received + */ + if ((cl = rxsd->ifsd_cl) == NULL) { + if ((cl = rxsd->ifsd_cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL) + break; +#if MEMORY_LOGGING + fl->ifl_cl_enqueued++; +#endif + } + if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) { + break; + } +#if MEMORY_LOGGING + fl->ifl_m_enqueued++; +#endif + + DBG_COUNTER_INC(rx_allocs); +#ifdef notyet + if ((rxsd->ifsd_flags & RX_SW_DESC_MAP_CREATED) == 0) { + int err; + + if ((err = bus_dmamap_create(fl->ifl_ifdi->idi_tag, 0, &rxsd->ifsd_map))) { + log(LOG_WARNING, "bus_dmamap_create failed %d\n", err); + uma_zfree(fl->ifl_zone, cl); + n = 0; + goto done; + } + rxsd->ifsd_flags |= RX_SW_DESC_MAP_CREATED; + } +#endif +#if defined(__i386__) || defined(__amd64__) + if (!IS_DMAR(ctx)) { + bus_addr = pmap_kextract((vm_offset_t)cl); + } else +#endif + { + struct rxq_refill_cb_arg cb_arg; + iflib_rxq_t q; + + cb_arg.error = 0; + q = fl->ifl_rxq; + err = bus_dmamap_load(fl->ifl_desc_tag, rxsd->ifsd_map, + cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 0); + + if (err != 0 || cb_arg.error) { + /* + * !zone_pack ? + */ + if (fl->ifl_zone == zone_pack) + uma_zfree(fl->ifl_zone, cl); + m_free(m); + n = 0; + goto done; + } + bus_addr = cb_arg.seg.ds_addr; + } + rxsd->ifsd_flags |= RX_SW_DESC_INUSE; + + MPASS(rxsd->ifsd_m == NULL); + rxsd->ifsd_cl = cl; + rxsd->ifsd_m = m; + fl->ifl_bus_addrs[i] = bus_addr; + fl->ifl_vm_addrs[i] = cl; + rxsd++; + fl->ifl_credits++; + i++; + MPASS(fl->ifl_credits <= fl->ifl_size); + if (++fl->ifl_pidx == fl->ifl_size) { + fl->ifl_pidx = 0; + fl->ifl_gen = 1; + rxsd = fl->ifl_sds; + } + if (n == 0 || i == IFLIB_MAX_RX_REFRESH) { + ctx->isc_rxd_refill(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx, + fl->ifl_bus_addrs, fl->ifl_vm_addrs, i); + i = 0; + pidx = fl->ifl_pidx; + } + } +done: + DBG_COUNTER_INC(rxd_flush); + if (fl->ifl_pidx == 0) + pidx = fl->ifl_size - 1; + else + pidx = fl->ifl_pidx - 1; + ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx); +} + +static __inline void +__iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max) +{ + /* we avoid allowing pidx to catch up with cidx as it confuses ixl */ + int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1; +#ifdef INVARIANTS + int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1; +#endif + + MPASS(fl->ifl_credits <= fl->ifl_size); + MPASS(reclaimable == delta); + + if (reclaimable > 0) + _iflib_fl_refill(ctx, fl, min(max, reclaimable)); +} + +static void +iflib_fl_bufs_free(iflib_fl_t fl) +{ + iflib_dma_info_t idi = fl->ifl_ifdi; + uint32_t i; + + MPASS(fl->ifl_credits >= 0); + for (i = 0; i < fl->ifl_size; i++) { + iflib_rxsd_t d = &fl->ifl_sds[i]; + + if (d->ifsd_flags & RX_SW_DESC_INUSE) { + bus_dmamap_unload(fl->ifl_desc_tag, d->ifsd_map); + bus_dmamap_destroy(fl->ifl_desc_tag, d->ifsd_map); + if (d->ifsd_m != NULL) { + m_init(d->ifsd_m, M_NOWAIT, MT_DATA, 0); + uma_zfree(zone_mbuf, d->ifsd_m); + } + if (d->ifsd_cl != NULL) + uma_zfree(fl->ifl_zone, d->ifsd_cl); + d->ifsd_flags = 0; + } else { + MPASS(d->ifsd_cl == NULL); + MPASS(d->ifsd_m == NULL); + } +#if MEMORY_LOGGING + fl->ifl_m_dequeued++; + fl->ifl_cl_dequeued++; +#endif + d->ifsd_cl = NULL; + d->ifsd_m = NULL; + } + /* + * Reset free list values + */ + fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = 0;; + bzero(idi->idi_vaddr, idi->idi_size); +} + +/********************************************************************* + * + * Initialize a receive ring and its buffers. + * + **********************************************************************/ +static int +iflib_fl_setup(iflib_fl_t fl) +{ + iflib_rxq_t rxq = fl->ifl_rxq; + if_ctx_t ctx = rxq->ifr_ctx; + if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; + + /* + ** Free current RX buffer structs and their mbufs + */ + iflib_fl_bufs_free(fl); + /* Now replenish the mbufs */ + MPASS(fl->ifl_credits == 0); + /* + * XXX don't set the max_frame_size to larger + * than the hardware can handle + */ + if (sctx->isc_max_frame_size <= 2048) + fl->ifl_buf_size = MCLBYTES; + else if (sctx->isc_max_frame_size <= 4096) + fl->ifl_buf_size = MJUMPAGESIZE; + else if (sctx->isc_max_frame_size <= 9216) + fl->ifl_buf_size = MJUM9BYTES; + else + fl->ifl_buf_size = MJUM16BYTES; + if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size) + ctx->ifc_max_fl_buf_size = fl->ifl_buf_size; + fl->ifl_cltype = m_gettype(fl->ifl_buf_size); + fl->ifl_zone = m_getzone(fl->ifl_buf_size); + + + /* avoid pre-allocating zillions of clusters to an idle card + * potentially speeding up attach + */ + _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size)); + MPASS(min(128, fl->ifl_size) == fl->ifl_credits); + if (min(128, fl->ifl_size) != fl->ifl_credits) + return (ENOBUFS); + /* + * handle failure + */ + MPASS(rxq != NULL); + MPASS(fl->ifl_ifdi != NULL); + bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + return (0); +} + +/********************************************************************* + * + * Free receive ring data structures + * + **********************************************************************/ +static void +iflib_rx_sds_free(iflib_rxq_t rxq) +{ + iflib_fl_t fl; + int i; + + if (rxq->ifr_fl != NULL) { + for (i = 0; i < rxq->ifr_nfl; i++) { + fl = &rxq->ifr_fl[i]; + if (fl->ifl_desc_tag != NULL) { + bus_dma_tag_destroy(fl->ifl_desc_tag); + fl->ifl_desc_tag = NULL; + } + } + if (rxq->ifr_fl->ifl_sds != NULL) + free(rxq->ifr_fl->ifl_sds, M_IFLIB); + + free(rxq->ifr_fl, M_IFLIB); + rxq->ifr_fl = NULL; + rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; + } +} + +/* + * MI independent logic + * + */ +static void +iflib_timer(void *arg) +{ + iflib_txq_t txq = arg; + if_ctx_t ctx = txq->ift_ctx; + if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; + + if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) + return; + /* + ** Check on the state of the TX queue(s), this + ** can be done without the lock because its RO + ** and the HUNG state will be static if set. + */ + IFDI_TIMER(ctx, txq->ift_id); + if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) && + (ctx->ifc_pause_frames == 0)) + goto hung; + + if (TXQ_AVAIL(txq) <= 2*scctx->isc_tx_nsegments || + ifmp_ring_is_stalled(txq->ift_br[0])) + GROUPTASK_ENQUEUE(&txq->ift_task); + + ctx->ifc_pause_frames = 0; + if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) + callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); + return; +hung: + CTX_LOCK(ctx); + if_setdrvflagbits(ctx->ifc_ifp, 0, IFF_DRV_RUNNING); + device_printf(ctx->ifc_dev, "TX(%d) desc avail = %d, pidx = %d\n", + txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx); + + IFDI_WATCHDOG_RESET(ctx); + ctx->ifc_watchdog_events++; + ctx->ifc_pause_frames = 0; + + iflib_init_locked(ctx); + CTX_UNLOCK(ctx); +} + +static void +iflib_init_locked(if_ctx_t ctx) +{ + if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; + if_t ifp = ctx->ifc_ifp; + iflib_fl_t fl; + iflib_txq_t txq; + iflib_rxq_t rxq; + int i, j; + + + if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); + IFDI_INTR_DISABLE(ctx); + + /* Set hardware offload abilities */ + if_clearhwassist(ifp); + if (if_getcapenable(ifp) & IFCAP_TXCSUM) + if_sethwassistbits(ifp, CSUM_IP | CSUM_TCP | CSUM_UDP, 0); + if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6) + if_sethwassistbits(ifp, (CSUM_TCP_IPV6 | CSUM_UDP_IPV6), 0); + if (if_getcapenable(ifp) & IFCAP_TSO4) + if_sethwassistbits(ifp, CSUM_IP_TSO, 0); + if (if_getcapenable(ifp) & IFCAP_TSO6) + if_sethwassistbits(ifp, CSUM_IP6_TSO, 0); + + for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) { + CALLOUT_LOCK(txq); + callout_stop(&txq->ift_timer); + callout_stop(&txq->ift_db_check); + CALLOUT_UNLOCK(txq); + iflib_netmap_txq_init(ctx, txq); + } + for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { + iflib_netmap_rxq_init(ctx, rxq); + } + IFDI_INIT(ctx); + for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { + for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { + if (iflib_fl_setup(fl)) { + device_printf(ctx->ifc_dev, "freelist setup failed - check cluster settings\n"); + goto done; + } + } + } + done: + if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); + IFDI_INTR_ENABLE(ctx); + txq = ctx->ifc_txqs; + for (i = 0; i < sctx->isc_ntxqsets; i++, txq++) + callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, + txq->ift_timer.c_cpu); +} + +static int +iflib_media_change(if_t ifp) +{ + if_ctx_t ctx = if_getsoftc(ifp); + int err; + + CTX_LOCK(ctx); + if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0) + iflib_init_locked(ctx); + CTX_UNLOCK(ctx); + return (err); +} + +static void +iflib_media_status(if_t ifp, struct ifmediareq *ifmr) +{ + if_ctx_t ctx = if_getsoftc(ifp); + + CTX_LOCK(ctx); + IFDI_UPDATE_ADMIN_STATUS(ctx); + IFDI_MEDIA_STATUS(ctx, ifmr); + CTX_UNLOCK(ctx); +} + +static void +iflib_stop(if_ctx_t ctx) +{ + iflib_txq_t txq = ctx->ifc_txqs; + iflib_rxq_t rxq = ctx->ifc_rxqs; + if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + iflib_dma_info_t di; + iflib_fl_t fl; + int i, j; + + /* Tell the stack that the interface is no longer active */ + if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); + + IFDI_INTR_DISABLE(ctx); + msleep(ctx, &ctx->ifc_mtx, PUSER, "iflib_init", hz); + + /* Wait for current tx queue users to exit to disarm watchdog timer. */ + for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) { + /* make sure all transmitters have completed before proceeding XXX */ + + /* clean any enqueued buffers */ + iflib_txq_check_drain(txq, 0); + /* Free any existing tx buffers. */ + for (j = 0; j < sctx->isc_ntxd; j++) { + iflib_txsd_free(ctx, txq, j); + } + txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0; + txq->ift_in_use = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0; + txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0; + txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0; + txq->ift_pullups = 0; + ifmp_ring_reset_stats(txq->ift_br[0]); + for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwtxqs; j++, di++) + bzero((void *)di->idi_vaddr, di->idi_size); + } + for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) { + /* make sure all transmitters have completed before proceeding XXX */ + + for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwrxqs; j++, di++) + bzero((void *)di->idi_vaddr, di->idi_size); + /* also resets the free lists pidx/cidx */ + for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) + iflib_fl_bufs_free(fl); + } + IFDI_STOP(ctx); +} + +static iflib_rxsd_t +rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int *cltype, int unload) +{ + int flid, cidx; + iflib_rxsd_t sd; + iflib_fl_t fl; + iflib_dma_info_t di; + + flid = irf->irf_flid; + cidx = irf->irf_idx; + fl = &rxq->ifr_fl[flid]; + fl->ifl_credits--; +#if MEMORY_LOGGING + fl->ifl_m_dequeued++; + if (cltype) + fl->ifl_cl_dequeued++; +#endif + sd = &fl->ifl_sds[cidx]; + di = fl->ifl_ifdi; + bus_dmamap_sync(di->idi_tag, di->idi_map, + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + + /* not valid assert if bxe really does SGE from non-contiguous elements */ + MPASS(fl->ifl_cidx == cidx); + if (unload) + bus_dmamap_unload(fl->ifl_desc_tag, sd->ifsd_map); + + if (__predict_false(++fl->ifl_cidx == fl->ifl_size)) { + fl->ifl_cidx = 0; + fl->ifl_gen = 0; + } + /* YES ick */ + if (cltype) + *cltype = fl->ifl_cltype; + return (sd); +} + +static struct mbuf * +assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri) +{ + int i, padlen , flags, cltype; + struct mbuf *m, *mh, *mt; + iflib_rxsd_t sd; + caddr_t cl; + + i = 0; + do { + sd = rxd_frag_to_sd(rxq, &ri->iri_frags[i], &cltype, TRUE); + + MPASS(sd->ifsd_cl != NULL); + MPASS(sd->ifsd_m != NULL); + m = sd->ifsd_m; + if (i == 0) { + flags = M_PKTHDR|M_EXT; + mh = mt = m; + padlen = ri->iri_pad; + } else { + flags = M_EXT; + mt->m_next = m; + mt = m; + /* assuming padding is only on the first fragment */ + padlen = 0; + } + sd->ifsd_m = NULL; + cl = sd->ifsd_cl; + sd->ifsd_cl = NULL; + + /* Can these two be made one ? */ + m_init(m, M_NOWAIT, MT_DATA, flags); + m_cljset(m, cl, cltype); + /* + * These must follow m_init and m_cljset + */ + m->m_data += padlen; + ri->iri_len -= padlen; + m->m_len = ri->iri_len; + } while (++i < ri->iri_nfrags); + + return (mh); +} + + + +/* + * Process one software descriptor + */ +static struct mbuf * +iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri) +{ + struct mbuf *m; + iflib_rxsd_t sd; + + /* should I merge this back in now that the two paths are basically duplicated? */ + if (ri->iri_len <= IFLIB_RX_COPY_THRESH) { + sd = rxd_frag_to_sd(rxq, &ri->iri_frags[0], NULL, FALSE); + m = sd->ifsd_m; + sd->ifsd_m = NULL; + m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR); + memcpy(m->m_data, sd->ifsd_cl, ri->iri_len); + m->m_len = ri->iri_len; + } else { + m = assemble_segments(rxq, ri); + } + m->m_pkthdr.len = ri->iri_len; + m->m_pkthdr.rcvif = ri->iri_ifp; + m->m_flags |= ri->iri_flags; + m->m_pkthdr.ether_vtag = ri->iri_vtag; + m->m_pkthdr.flowid = ri->iri_flowid; + M_HASHTYPE_SET(m, ri->iri_rsstype); + m->m_pkthdr.csum_flags = ri->iri_csum_flags; + m->m_pkthdr.csum_data = ri->iri_csum_data; + return (m); +} + +static bool +iflib_rxeof(iflib_rxq_t rxq, int budget) +{ + if_ctx_t ctx = rxq->ifr_ctx; + if_shared_ctx_t sctx = ctx->ifc_sctx; + int avail, i; + uint16_t *cidxp; + struct if_rxd_info ri; + int err, budget_left, rx_bytes, rx_pkts; + iflib_fl_t fl; + struct ifnet *ifp; + struct lro_entry *queued; + int lro_enabled; + /* + * XXX early demux data packets so that if_input processing only handles + * acks in interrupt context + */ + struct mbuf *m, *mh, *mt; + + if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &budget)) { + return (FALSE); + } + + mh = mt = NULL; + MPASS(budget > 0); + rx_pkts = rx_bytes = 0; + if (sctx->isc_flags & IFLIB_HAS_CQ) + cidxp = &rxq->ifr_cq_cidx; + else + cidxp = &rxq->ifr_fl[0].ifl_cidx; + if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp)) == 0) { + for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) + __iflib_fl_refill_lt(ctx, fl, budget + 8); + DBG_COUNTER_INC(rx_unavail); + return (false); + } + + for (budget_left = budget; (budget_left > 0) && (avail > 0); budget_left--, avail--) { + if (__predict_false(!CTX_ACTIVE(ctx))) { + DBG_COUNTER_INC(rx_ctx_inactive); + break; + } + /* + * Reset client set fields to their default values + */ + bzero(&ri, sizeof(ri)); + ri.iri_qsidx = rxq->ifr_id; + ri.iri_cidx = *cidxp; + ri.iri_ifp = ctx->ifc_ifp; + ri.iri_frags = rxq->ifr_frags; + err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); + + /* in lieu of handling correctly - make sure it isn't being unhandled */ + MPASS(err == 0); + if (sctx->isc_flags & IFLIB_HAS_CQ) { + /* we know we consumed _one_ CQ entry */ + if (++rxq->ifr_cq_cidx == sctx->isc_nrxd) { + rxq->ifr_cq_cidx = 0; + rxq->ifr_cq_gen = 0; + } + /* was this only a completion queue message? */ + if (__predict_false(ri.iri_nfrags == 0)) + continue; + } + MPASS(ri.iri_nfrags != 0); + MPASS(ri.iri_len != 0); + + /* will advance the cidx on the corresponding free lists */ + m = iflib_rxd_pkt_get(rxq, &ri); + if (avail == 0 && budget_left) + avail = iflib_rxd_avail(ctx, rxq, *cidxp); + + if (__predict_false(m == NULL)) { + DBG_COUNTER_INC(rx_mbuf_null); + continue; + } + /* imm_pkt: -- cxgb */ + if (mh == NULL) + mh = mt = m; + else { + mt->m_nextpkt = m; + mt = m; + } + } + /* make sure that we can refill faster than drain */ + for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) + __iflib_fl_refill_lt(ctx, fl, budget + 8); + + ifp = ctx->ifc_ifp; + lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO); + + while (mh != NULL) { + m = mh; + mh = mh->m_nextpkt; + m->m_nextpkt = NULL; + rx_bytes += m->m_pkthdr.len; + rx_pkts++; + if (lro_enabled && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0) + continue; + DBG_COUNTER_INC(rx_if_input); + ifp->if_input(ifp, m); + } + if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes); + if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts); + + /* + * Flush any outstanding LRO work + */ + while ((queued = LIST_FIRST(&rxq->ifr_lc.lro_active)) != NULL) { + LIST_REMOVE(queued, next); + tcp_lro_flush(&rxq->ifr_lc, queued); + } + return (iflib_rxd_avail(ctx, rxq, *cidxp)); +} + +#define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags) +#define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG) +#define TXQ_MAX_DB_DEFERRED(ctx) (ctx->ifc_sctx->isc_ntxd >> 5) +#define TXQ_MAX_DB_CONSUMED(ctx) (ctx->ifc_sctx->isc_ntxd >> 4) + +static __inline void +iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring) +{ + uint32_t dbval; + + if (ring || txq->ift_db_pending >= TXQ_MAX_DB_DEFERRED(ctx)) { + + /* the lock will only ever be contended in the !min_latency case */ + if (!TXDB_TRYLOCK(txq)) + return; + dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx; + ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval); + txq->ift_db_pending = txq->ift_npending = 0; + TXDB_UNLOCK(txq); + } +} + +static void +iflib_txd_deferred_db_check(void * arg) +{ + iflib_txq_t txq = arg; + + /* simple non-zero boolean so use bitwise OR */ + if ((txq->ift_db_pending | txq->ift_npending) && + txq->ift_db_pending >= txq->ift_db_pending_queued) + iflib_txd_db_check(txq->ift_ctx, txq, TRUE); + txq->ift_db_pending_queued = 0; + if (ifmp_ring_is_stalled(txq->ift_br[0])) + iflib_txq_check_drain(txq, 4); +} + +#ifdef PKT_DEBUG +static void +print_pkt(if_pkt_info_t pi) +{ + printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n", + pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx); + printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n", + pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag); + printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n", + pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto); +} +#endif + +#define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO) +#define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO) + +static int +iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp) +{ + struct ether_vlan_header *eh; + struct mbuf *m, *n; + + m = *mp; + /* + * Determine where frame payload starts. + * Jump over vlan headers if already present, + * helpful for QinQ too. + */ + if (__predict_false(m->m_len < sizeof(*eh))) { + txq->ift_pullups++; + if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL)) + return (ENOMEM); + } + eh = mtod(m, struct ether_vlan_header *); + if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { + pi->ipi_etype = ntohs(eh->evl_proto); + pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; + } else { + pi->ipi_etype = ntohs(eh->evl_encap_proto); + pi->ipi_ehdrlen = ETHER_HDR_LEN; + } + + switch (pi->ipi_etype) { +#ifdef INET + case ETHERTYPE_IP: + { + struct ip *ip = NULL; + struct tcphdr *th = NULL; + int minthlen; + + minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th)); + if (__predict_false(m->m_len < minthlen)) { + /* + * if this code bloat is causing too much of a hit + * move it to a separate function and mark it noinline + */ + if (m->m_len == pi->ipi_ehdrlen) { + n = m->m_next; + MPASS(n); + if (n->m_len >= sizeof(*ip)) { + ip = (struct ip *)n->m_data; + if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th)) + th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + } else { + txq->ift_pullups++; + if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) + return (ENOMEM); + ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); + } + } else { + txq->ift_pullups++; + if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) + return (ENOMEM); + ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); + if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) + th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + } + } else { + ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); + if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) + th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + } + pi->ipi_ip_hlen = ip->ip_hl << 2; + pi->ipi_ipproto = ip->ip_p; + pi->ipi_flags |= IPI_TX_IPV4; + + if (pi->ipi_csum_flags & CSUM_IP) + ip->ip_sum = 0; + + if (pi->ipi_ipproto == IPPROTO_TCP) { + if (__predict_false(th == NULL)) { + txq->ift_pullups++; + if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL)) + return (ENOMEM); + th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen); + } + pi->ipi_tcp_hflags = th->th_flags; + pi->ipi_tcp_hlen = th->th_off << 2; + pi->ipi_tcp_seq = th->th_seq; + } + if (IS_TSO4(pi)) { + if (__predict_false(ip->ip_p != IPPROTO_TCP)) + return (ENXIO); + th->th_sum = in_pseudo(ip->ip_src.s_addr, + ip->ip_dst.s_addr, htons(IPPROTO_TCP)); + pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; + } + break; + } +#endif +#ifdef INET6 + case ETHERTYPE_IPV6: + { + struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen); + struct tcphdr *th; + pi->ipi_ip_hlen = sizeof(struct ip6_hdr); + + if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) { + if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL)) + return (ENOMEM); + } + th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen); + + /* XXX-BZ this will go badly in case of ext hdrs. */ + pi->ipi_ipproto = ip6->ip6_nxt; + pi->ipi_flags |= IPI_TX_IPV6; + + if (pi->ipi_ipproto == IPPROTO_TCP) { + if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) { + if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL)) + return (ENOMEM); + } + pi->ipi_tcp_hflags = th->th_flags; + pi->ipi_tcp_hlen = th->th_off << 2; + } + if (IS_TSO6(pi)) { + + if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP)) + return (ENXIO); + /* + * The corresponding flag is set by the stack in the IPv4 + * TSO case, but not in IPv6 (at least in FreeBSD 10.2). + * So, set it here because the rest of the flow requires it. + */ + pi->ipi_csum_flags |= CSUM_TCP_IPV6; + th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0); + pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; + } + break; + } +#endif + default: + pi->ipi_csum_flags &= ~CSUM_OFFLOAD; + pi->ipi_ip_hlen = 0; + break; + } + *mp = m; + return (0); +} + + +static __noinline struct mbuf * +collapse_pkthdr(struct mbuf *m0) +{ + struct mbuf *m, *m_next, *tmp; + + m = m0; + m_next = m->m_next; + while (m_next != NULL && m_next->m_len == 0) { + m = m_next; + m->m_next = NULL; + m_free(m); + m_next = m_next->m_next; + } + m = m0; + m->m_next = m_next; + if ((m_next->m_flags & M_EXT) == 0) { + m = m_defrag(m, M_NOWAIT); + } else { + tmp = m_next->m_next; + memcpy(m_next, m, MPKTHSIZE); + m = m_next; + m->m_next = tmp; + } + return (m); +} + +/* + * If dodgy hardware rejects the scatter gather chain we've handed it + * we'll need to rebuild the mbuf chain before we can call m_defrag + */ +static __noinline struct mbuf * +iflib_rebuild_mbuf(iflib_txq_t txq) +{ + + int ntxd, mhlen, len, i, pidx; + struct mbuf *m, *mh, **ifsd_m; + if_shared_ctx_t sctx; + + pidx = txq->ift_pidx; + ifsd_m = txq->ift_sds.ifsd_m; + sctx = txq->ift_ctx->ifc_sctx; + ntxd = sctx->isc_ntxd; + mh = m = ifsd_m[pidx]; + ifsd_m[pidx] = NULL; +#if MEMORY_LOGGING + txq->ift_dequeued++; +#endif + len = m->m_len; + mhlen = m->m_pkthdr.len; + i = 1; + + while (len < mhlen && (m->m_next == NULL)) { + m->m_next = ifsd_m[(pidx + i) & (ntxd-1)]; + ifsd_m[(pidx + i) & (ntxd -1)] = NULL; +#if MEMORY_LOGGING + txq->ift_dequeued++; +#endif + m = m->m_next; + len += m->m_len; + i++; + } + return (mh); +} + +static int +iflib_busdma_load_mbuf_sg(iflib_txq_t txq, bus_dma_tag_t tag, bus_dmamap_t map, + struct mbuf **m0, bus_dma_segment_t *segs, int *nsegs, + int max_segs, int flags) +{ + if_ctx_t ctx; + if_shared_ctx_t sctx; + int i, next, pidx, mask, err, maxsegsz, ntxd, count; + struct mbuf *m, *tmp, **ifsd_m, **mp; + + m = *m0; + + /* + * Please don't ever do this + */ + if (__predict_false(m->m_len == 0)) + *m0 = m = collapse_pkthdr(m); + + ctx = txq->ift_ctx; + sctx = ctx->ifc_sctx; + ifsd_m = txq->ift_sds.ifsd_m; + ntxd = sctx->isc_ntxd; + pidx = txq->ift_pidx; + if (map != NULL) { + uint8_t *ifsd_flags = txq->ift_sds.ifsd_flags; + + err = bus_dmamap_load_mbuf_sg(tag, map, + *m0, segs, nsegs, BUS_DMA_NOWAIT); + if (err) + return (err); + ifsd_flags[pidx] |= TX_SW_DESC_MAPPED; + i = 0; + next = pidx; + mask = (sctx->isc_ntxd-1); + m = *m0; + do { + mp = &ifsd_m[next]; + *mp = m; + m = m->m_next; + (*mp)->m_next = NULL; + if (__predict_false((*mp)->m_len == 0)) { + m_free(*mp); + *mp = NULL; + } else + next = (pidx + i) & (ntxd-1); + } while (m != NULL); + } else { + int buflen, sgsize, max_sgsize; + vm_offset_t vaddr; + vm_paddr_t curaddr; + + count = i = 0; + maxsegsz = sctx->isc_tx_maxsize; + m = *m0; + do { + if (__predict_false(m->m_len <= 0)) { + tmp = m; + m = m->m_next; + tmp->m_next = NULL; + m_free(tmp); + continue; + } + buflen = m->m_len; + vaddr = (vm_offset_t)m->m_data; + /* + * see if we can't be smarter about physically + * contiguous mappings + */ + next = (pidx + count) & (ntxd-1); + MPASS(ifsd_m[next] == NULL); +#if MEMORY_LOGGING + txq->ift_enqueued++; +#endif + ifsd_m[next] = m; + while (buflen > 0) { + max_sgsize = MIN(buflen, maxsegsz); + curaddr = pmap_kextract(vaddr); + sgsize = PAGE_SIZE - (curaddr & PAGE_MASK); + sgsize = MIN(sgsize, max_sgsize); + segs[i].ds_addr = curaddr; + segs[i].ds_len = sgsize; + vaddr += sgsize; + buflen -= sgsize; + i++; + if (i >= max_segs) + goto err; + } + count++; + tmp = m; + m = m->m_next; + tmp->m_next = NULL; + } while (m != NULL); + *nsegs = i; + } + return (0); +err: + *m0 = iflib_rebuild_mbuf(txq); + return (EFBIG); +} + +static int +iflib_encap(iflib_txq_t txq, struct mbuf **m_headp) +{ + if_ctx_t ctx; + if_shared_ctx_t sctx; + if_softc_ctx_t scctx; + bus_dma_segment_t *segs; + struct mbuf *m_head; + bus_dmamap_t map; + struct if_pkt_info pi; + int remap = 0; + int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd; + bus_dma_tag_t desc_tag; + + segs = txq->ift_segs; + ctx = txq->ift_ctx; + sctx = ctx->ifc_sctx; + scctx = &ctx->ifc_softc_ctx; + segs = txq->ift_segs; + ntxd = sctx->isc_ntxd; + m_head = *m_headp; + map = NULL; + + /* + * If we're doing TSO the next descriptor to clean may be quite far ahead + */ + cidx = txq->ift_cidx; + pidx = txq->ift_pidx; + next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1); + + /* prefetch the next cache line of mbuf pointers and flags */ + prefetch(&txq->ift_sds.ifsd_m[next]); + if (txq->ift_sds.ifsd_map != NULL) { + prefetch(&txq->ift_sds.ifsd_map[next]); + map = txq->ift_sds.ifsd_map[pidx]; + next = (cidx + CACHE_LINE_SIZE) & (ntxd-1); + prefetch(&txq->ift_sds.ifsd_flags[next]); + } + + + if (m_head->m_pkthdr.csum_flags & CSUM_TSO) { + desc_tag = txq->ift_tso_desc_tag; + max_segs = scctx->isc_tx_tso_segments_max; + } else { + desc_tag = txq->ift_desc_tag; + max_segs = scctx->isc_tx_nsegments; + } + m_head = *m_headp; + bzero(&pi, sizeof(pi)); + pi.ipi_len = m_head->m_pkthdr.len; + pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST)); + pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags; + pi.ipi_vtag = (m_head->m_flags & M_VLANTAG) ? m_head->m_pkthdr.ether_vtag : 0; + pi.ipi_pidx = pidx; + pi.ipi_qsidx = txq->ift_id; + + /* deliberate bitwise OR to make one condition */ + if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) { + if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) + return (err); + m_head = *m_headp; + } + +retry: + err = iflib_busdma_load_mbuf_sg(txq, desc_tag, map, m_headp, segs, &nsegs, max_segs, BUS_DMA_NOWAIT); +defrag: + if (__predict_false(err)) { + switch (err) { + case EFBIG: + /* try collapse once and defrag once */ + if (remap == 0) + m_head = m_collapse(*m_headp, M_NOWAIT, max_segs); + if (remap == 1) + m_head = m_defrag(*m_headp, M_NOWAIT); + remap++; + if (__predict_false(m_head == NULL)) + goto defrag_failed; + txq->ift_mbuf_defrag++; + *m_headp = m_head; + goto retry; + break; + case ENOMEM: + txq->ift_no_tx_dma_setup++; + break; + default: + txq->ift_no_tx_dma_setup++; + m_freem(*m_headp); + DBG_COUNTER_INC(tx_frees); + *m_headp = NULL; + break; + } + txq->ift_map_failed++; + DBG_COUNTER_INC(encap_load_mbuf_fail); + return (err); + } + + /* + * XXX assumes a 1 to 1 relationship between segments and + * descriptors - this does not hold true on all drivers, e.g. + * cxgb + */ + if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) { + txq->ift_no_desc_avail++; + if (map != NULL) + bus_dmamap_unload(desc_tag, map); + DBG_COUNTER_INC(encap_txq_avail_fail); + if (txq->ift_task.gt_task.ta_pending == 0) + GROUPTASK_ENQUEUE(&txq->ift_task); + return (ENOBUFS); + } + pi.ipi_segs = segs; + pi.ipi_nsegs = nsegs; + + MPASS(pidx >= 0 && pidx < sctx->isc_ntxd); +#ifdef PKT_DEBUG + print_pkt(&pi); +#endif + if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) { + bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + DBG_COUNTER_INC(tx_encap); + MPASS(pi.ipi_new_pidx >= 0 && pi.ipi_new_pidx < sctx->isc_ntxd); + + ndesc = pi.ipi_new_pidx - pi.ipi_pidx; + if (pi.ipi_new_pidx < pi.ipi_pidx) { + ndesc += sctx->isc_ntxd; + txq->ift_gen = 1; + } + MPASS(pi.ipi_new_pidx != pidx); + MPASS(ndesc > 0); + txq->ift_in_use += ndesc; + /* + * We update the last software descriptor again here because there may + * be a sentinel and/or there may be more mbufs than segments + */ + txq->ift_pidx = pi.ipi_new_pidx; + txq->ift_npending += pi.ipi_ndescs; + } else if (__predict_false(err == EFBIG && remap < 2)) { + *m_headp = m_head = iflib_rebuild_mbuf(txq); + remap = 1; + txq->ift_txd_encap_efbig++; + goto defrag; + } else + DBG_COUNTER_INC(encap_txd_encap_fail); + return (err); + +defrag_failed: + txq->ift_mbuf_defrag_failed++; + txq->ift_map_failed++; + m_freem(*m_headp); + DBG_COUNTER_INC(tx_frees); + *m_headp = NULL; + return (ENOMEM); +} + +/* forward compatibility for cxgb */ +#define FIRST_QSET(ctx) 0 + +#define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets) +#define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets) +#define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NRXQSETS(ctx)) + FIRST_QSET(ctx)) +#define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments)) +#define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh) +#define MAX_TX_DESC(ctx) ((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max) + + + +/* if there are more than TXQ_MIN_OCCUPANCY packets pending we consider deferring + * doorbell writes + * + * ORing with 2 assures that min occupancy is never less than 2 without any conditional logic + */ +#define TXQ_MIN_OCCUPANCY(ctx) ((ctx->ifc_sctx->isc_ntxd >> 6)| 0x2) + +static inline int +iflib_txq_min_occupancy(iflib_txq_t txq) +{ + if_ctx_t ctx; + + ctx = txq->ift_ctx; + return (get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen) < TXQ_MIN_OCCUPANCY(ctx) + MAX_TX_DESC(ctx)); +} + +static void +iflib_tx_desc_free(iflib_txq_t txq, int n) +{ + int hasmap; + uint32_t qsize, cidx, mask, gen; + struct mbuf *m, **ifsd_m; + uint8_t *ifsd_flags; + bus_dmamap_t *ifsd_map; + + cidx = txq->ift_cidx; + gen = txq->ift_gen; + qsize = txq->ift_ctx->ifc_sctx->isc_ntxd; + mask = qsize-1; + hasmap = txq->ift_sds.ifsd_map != NULL; + ifsd_flags = txq->ift_sds.ifsd_flags; + ifsd_m = txq->ift_sds.ifsd_m; + ifsd_map = txq->ift_sds.ifsd_map; + + while (n--) { + prefetch(ifsd_m[(cidx + 3) & mask]); + prefetch(ifsd_m[(cidx + 4) & mask]); + + if (ifsd_m[cidx] != NULL) { + prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]); + prefetch(&ifsd_flags[(cidx + CACHE_PTR_INCREMENT) & mask]); + if (hasmap && (ifsd_flags[cidx] & TX_SW_DESC_MAPPED)) { + /* + * does it matter if it's not the TSO tag? If so we'll + * have to add the type to flags + */ + bus_dmamap_unload(txq->ift_desc_tag, ifsd_map[cidx]); + ifsd_flags[cidx] &= ~TX_SW_DESC_MAPPED; + } + if ((m = ifsd_m[cidx]) != NULL) { + /* XXX we don't support any drivers that batch packets yet */ + MPASS(m->m_nextpkt == NULL); + + m_freem(m); + ifsd_m[cidx] = NULL; +#if MEMORY_LOGGING + txq->ift_dequeued++; +#endif + DBG_COUNTER_INC(tx_frees); + } + } + if (__predict_false(++cidx == qsize)) { + cidx = 0; + gen = 0; + } + } + txq->ift_cidx = cidx; + txq->ift_gen = gen; +} + +static __inline int +iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh) +{ + int reclaim; + if_ctx_t ctx = txq->ift_ctx; + + KASSERT(thresh >= 0, ("invalid threshold to reclaim")); + MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size); + + /* + * Need a rate-limiting check so that this isn't called every time + */ + iflib_tx_credits_update(ctx, txq); + reclaim = DESC_RECLAIMABLE(txq); + + if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) { +#ifdef INVARIANTS + if (iflib_verbose_debug) { + printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__, + txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments, + reclaim, thresh); + + } +#endif + return (0); + } + iflib_tx_desc_free(txq, reclaim); + txq->ift_cleaned += reclaim; + txq->ift_in_use -= reclaim; + + if (txq->ift_active == FALSE) + txq->ift_active = TRUE; + + return (reclaim); +} + +static struct mbuf ** +_ring_peek_one(struct ifmp_ring *r, int cidx, int offset) +{ + + return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (r->size-1)])); +} + +static void +iflib_txq_check_drain(iflib_txq_t txq, int budget) +{ + + ifmp_ring_check_drainage(txq->ift_br[0], budget); +} + +static uint32_t +iflib_txq_can_drain(struct ifmp_ring *r) +{ + iflib_txq_t txq = r->cookie; + if_ctx_t ctx = txq->ift_ctx; + + return ((TXQ_AVAIL(txq) >= MAX_TX_DESC(ctx)) || + ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, false)); +} + +static uint32_t +iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx) +{ + iflib_txq_t txq = r->cookie; + if_ctx_t ctx = txq->ift_ctx; + if_t ifp = ctx->ifc_ifp; + struct mbuf **mp, *m; + int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail, err, in_use_prev, desc_used; + + if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) || + !LINK_ACTIVE(ctx))) { + DBG_COUNTER_INC(txq_drain_notready); + return (0); + } + + avail = IDXDIFF(pidx, cidx, r->size); + if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) { + DBG_COUNTER_INC(txq_drain_flushing); + for (i = 0; i < avail; i++) { + m_freem(r->items[(cidx + i) & (r->size-1)]); + r->items[(cidx + i) & (r->size-1)] = NULL; + } + return (avail); + } + iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx)); + if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) { + txq->ift_qstatus = IFLIB_QUEUE_IDLE; + CALLOUT_LOCK(txq); + callout_stop(&txq->ift_timer); + callout_stop(&txq->ift_db_check); + CALLOUT_UNLOCK(txq); + DBG_COUNTER_INC(txq_drain_oactive); + return (0); + } + consumed = mcast_sent = bytes_sent = pkt_sent = 0; + count = MIN(avail, TX_BATCH_SIZE); + + for (desc_used = i = 0; i < count && TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2; i++) { + mp = _ring_peek_one(r, cidx, i); + in_use_prev = txq->ift_in_use; + err = iflib_encap(txq, mp); + /* + * What other errors should we bail out for? + */ + if (err == ENOBUFS) { + DBG_COUNTER_INC(txq_drain_encapfail); + break; + } + consumed++; + if (err) + continue; + + pkt_sent++; + m = *mp; + DBG_COUNTER_INC(tx_sent); + bytes_sent += m->m_pkthdr.len; + if (m->m_flags & M_MCAST) + mcast_sent++; + + txq->ift_db_pending += (txq->ift_in_use - in_use_prev); + desc_used += (txq->ift_in_use - in_use_prev); + iflib_txd_db_check(ctx, txq, FALSE); + ETHER_BPF_MTAP(ifp, m); + if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) + break; + + if (desc_used > TXQ_MAX_DB_CONSUMED(ctx)) + break; + } + + if ((iflib_min_tx_latency || iflib_txq_min_occupancy(txq)) && txq->ift_db_pending) + iflib_txd_db_check(ctx, txq, TRUE); + else if ((txq->ift_db_pending || TXQ_AVAIL(txq) < MAX_TX_DESC(ctx)) && + (callout_pending(&txq->ift_db_check) == 0)) { + txq->ift_db_pending_queued = txq->ift_db_pending; + callout_reset_on(&txq->ift_db_check, 1, iflib_txd_deferred_db_check, + txq, txq->ift_db_check.c_cpu); + } + if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent); + if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent); + if (mcast_sent) + if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent); + + return (consumed); +} + +static void +_task_fn_tx(void *context, int pending) +{ + iflib_txq_t txq = context; + if_ctx_t ctx = txq->ift_ctx; + + if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) + return; + ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); +} + +static void +_task_fn_rx(void *context, int pending) +{ + iflib_rxq_t rxq = context; + if_ctx_t ctx = rxq->ifr_ctx; + bool more; + + DBG_COUNTER_INC(task_fn_rxs); + if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) + return; + + if ((more = iflib_rxeof(rxq, 16 /* XXX */)) == false) { + if (ctx->ifc_flags & IFC_LEGACY) + IFDI_INTR_ENABLE(ctx); + else { + DBG_COUNTER_INC(rx_intr_enables); + IFDI_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id); + } + } + if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) + return; + if (more) + GROUPTASK_ENQUEUE(&rxq->ifr_task); +} + +static void +_task_fn_admin(void *context, int pending) +{ + if_ctx_t ctx = context; + if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; + iflib_txq_t txq; + int i; + + if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) + return; + + CTX_LOCK(ctx); + for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) { + CALLOUT_LOCK(txq); + callout_stop(&txq->ift_timer); + CALLOUT_UNLOCK(txq); + } + IFDI_UPDATE_ADMIN_STATUS(ctx); + for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) + callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); + IFDI_LINK_INTR_ENABLE(ctx); + CTX_UNLOCK(ctx); + + if (LINK_ACTIVE(ctx) == 0) + return; + for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) + iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); +} + + +static void +_task_fn_iov(void *context, int pending) +{ + if_ctx_t ctx = context; + + if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) + return; + + CTX_LOCK(ctx); + IFDI_VFLR_HANDLE(ctx); + CTX_UNLOCK(ctx); +} + +static int +iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS) +{ + int err; + if_int_delay_info_t info; + if_ctx_t ctx; + + info = (if_int_delay_info_t)arg1; + ctx = info->iidi_ctx; + info->iidi_req = req; + info->iidi_oidp = oidp; + CTX_LOCK(ctx); + err = IFDI_SYSCTL_INT_DELAY(ctx, info); + CTX_UNLOCK(ctx); + return (err); +} + +/********************************************************************* + * + * IFNET FUNCTIONS + * + **********************************************************************/ + +static void +iflib_if_init_locked(if_ctx_t ctx) +{ + iflib_stop(ctx); + iflib_init_locked(ctx); +} + + +static void +iflib_if_init(void *arg) +{ + if_ctx_t ctx = arg; + + CTX_LOCK(ctx); + iflib_if_init_locked(ctx); + CTX_UNLOCK(ctx); +} + +static int +iflib_if_transmit(if_t ifp, struct mbuf *m) +{ + if_ctx_t ctx = if_getsoftc(ifp); + + iflib_txq_t txq; + struct mbuf *marr[8], **mp, *next; + int err, i, count, qidx; + + if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) { + DBG_COUNTER_INC(tx_frees); + m_freem(m); + return (0); + } + + qidx = 0; + if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m)) + qidx = QIDX(ctx, m); + /* + * XXX calculate buf_ring based on flowid (divvy up bits?) + */ + txq = &ctx->ifc_txqs[qidx]; + +#ifdef DRIVER_BACKPRESSURE + if (txq->ift_closed) { + while (m != NULL) { + next = m->m_nextpkt; + m->m_nextpkt = NULL; + m_freem(m); + m = next; + } + return (ENOBUFS); + } +#endif + qidx = count = 0; + mp = marr; + next = m; + do { + count++; + next = next->m_nextpkt; + } while (next != NULL); + + if (count > 8) + if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) { + /* XXX check nextpkt */ + m_freem(m); + /* XXX simplify for now */ + DBG_COUNTER_INC(tx_frees); + return (ENOBUFS); + } + for (next = m, i = 0; next != NULL; i++) { + mp[i] = next; + next = next->m_nextpkt; + mp[i]->m_nextpkt = NULL; + } + DBG_COUNTER_INC(tx_seen); + err = ifmp_ring_enqueue(txq->ift_br[0], (void **)mp, count, TX_BATCH_SIZE); + + if (iflib_txq_can_drain(txq->ift_br[0])) + GROUPTASK_ENQUEUE(&txq->ift_task); + if (err) { + /* support forthcoming later */ +#ifdef DRIVER_BACKPRESSURE + txq->ift_closed = TRUE; +#endif + for (i = 0; i < count; i++) + m_freem(mp[i]); + ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); + } + if (count > 16) + free(mp, M_IFLIB); + + return (err); +} + +static void +iflib_if_qflush(if_t ifp) +{ + if_ctx_t ctx = if_getsoftc(ifp); + iflib_txq_t txq = ctx->ifc_txqs; + int i; + + CTX_LOCK(ctx); + ctx->ifc_flags |= IFC_QFLUSH; + CTX_UNLOCK(ctx); + for (i = 0; i < NTXQSETS(ctx); i++, txq++) + while (!(ifmp_ring_is_idle(txq->ift_br[0]) || ifmp_ring_is_stalled(txq->ift_br[0]))) + iflib_txq_check_drain(txq, 0); + CTX_LOCK(ctx); + ctx->ifc_flags &= ~IFC_QFLUSH; + CTX_UNLOCK(ctx); + + if_qflush(ifp); +} + +#define IFCAP_REINIT (IFCAP_HWCSUM|IFCAP_TSO4|IFCAP_TSO6|IFCAP_VLAN_HWTAGGING|IFCAP_VLAN_MTU | \ + IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO) + +#define IFCAP_FLAGS (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \ + IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTAGGING | \ + IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO) + +static int +iflib_if_ioctl(if_t ifp, u_long command, caddr_t data) +{ + if_ctx_t ctx = if_getsoftc(ifp); + struct ifreq *ifr = (struct ifreq *)data; +#if defined(INET) || defined(INET6) + struct ifaddr *ifa = (struct ifaddr *)data; +#endif + bool avoid_reset = FALSE; + int err = 0, reinit = 0, bits; + + switch (command) { + case SIOCSIFADDR: +#ifdef INET + if (ifa->ifa_addr->sa_family == AF_INET) + avoid_reset = TRUE; +#endif +#ifdef INET6 + if (ifa->ifa_addr->sa_family == AF_INET6) + avoid_reset = TRUE; +#endif + /* + ** Calling init results in link renegotiation, + ** so we avoid doing it when possible. + */ + if (avoid_reset) { + if_setflagbits(ifp, IFF_UP,0); + if (!(if_getdrvflags(ifp)& IFF_DRV_RUNNING)) + reinit = 1; +#ifdef INET + if (!(if_getflags(ifp) & IFF_NOARP)) + arp_ifinit(ifp, ifa); +#endif + } else + err = ether_ioctl(ifp, command, data); + break; + case SIOCSIFMTU: + CTX_LOCK(ctx); + if (ifr->ifr_mtu == if_getmtu(ifp)) { + CTX_UNLOCK(ctx); + break; + } + bits = if_getdrvflags(ifp); + /* stop the driver and free any clusters before proceeding */ + iflib_stop(ctx); + + if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) { + if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size) + ctx->ifc_flags |= IFC_MULTISEG; + else + ctx->ifc_flags &= ~IFC_MULTISEG; + err = if_setmtu(ifp, ifr->ifr_mtu); + } + iflib_init_locked(ctx); + if_setdrvflags(ifp, bits); + CTX_UNLOCK(ctx); + break; + case SIOCSIFFLAGS: + CTX_LOCK(ctx); + if (if_getflags(ifp) & IFF_UP) { + if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { + if ((if_getflags(ifp) ^ ctx->ifc_if_flags) & + (IFF_PROMISC | IFF_ALLMULTI)) { + err = IFDI_PROMISC_SET(ctx, if_getflags(ifp)); + } + } else + reinit = 1; + } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { + iflib_stop(ctx); + } + ctx->ifc_if_flags = if_getflags(ifp); + CTX_UNLOCK(ctx); + break; + + break; + case SIOCADDMULTI: + case SIOCDELMULTI: + if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { + CTX_LOCK(ctx); + IFDI_INTR_DISABLE(ctx); + IFDI_MULTI_SET(ctx); + IFDI_INTR_ENABLE(ctx); + CTX_UNLOCK(ctx); + } + break; + case SIOCSIFMEDIA: + CTX_LOCK(ctx); + IFDI_MEDIA_SET(ctx); + CTX_UNLOCK(ctx); + /* falls thru */ + case SIOCGIFMEDIA: + err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command); + break; + case SIOCGI2C: + { + struct ifi2creq i2c; + + err = copyin(ifr->ifr_data, &i2c, sizeof(i2c)); + if (err != 0) + break; + if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) { + err = EINVAL; + break; + } + if (i2c.len > sizeof(i2c.data)) { + err = EINVAL; + break; + } + + if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0) + err = copyout(&i2c, ifr->ifr_data, sizeof(i2c)); + break; + } + case SIOCSIFCAP: + { + int mask, setmask; + + mask = ifr->ifr_reqcap ^ if_getcapenable(ifp); + setmask = 0; +#ifdef TCP_OFFLOAD + setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6); +#endif + setmask |= (mask & IFCAP_FLAGS); + + if ((mask & IFCAP_WOL) && + (if_getcapabilities(ifp) & IFCAP_WOL) != 0) + setmask |= (mask & (IFCAP_WOL_MCAST|IFCAP_WOL_MAGIC)); + if_vlancap(ifp); + /* + * want to ensure that traffic has stopped before we change any of the flags + */ + if (setmask) { + CTX_LOCK(ctx); + bits = if_getdrvflags(ifp); + if (setmask & IFCAP_REINIT) + iflib_stop(ctx); + if_togglecapenable(ifp, setmask); + if (setmask & IFCAP_REINIT) + iflib_init_locked(ctx); + if_setdrvflags(ifp, bits); + CTX_UNLOCK(ctx); + } + break; + } + case SIOCGPRIVATE_0: + case SIOCSDRVSPEC: + case SIOCGDRVSPEC: + CTX_LOCK(ctx); + err = IFDI_PRIV_IOCTL(ctx, command, data); + CTX_UNLOCK(ctx); + break; + default: + err = ether_ioctl(ifp, command, data); + break; + } + if (reinit) + iflib_if_init(ctx); + return (err); +} + +static uint64_t +iflib_if_get_counter(if_t ifp, ift_counter cnt) +{ + if_ctx_t ctx = if_getsoftc(ifp); + + return (IFDI_GET_COUNTER(ctx, cnt)); +} + +/********************************************************************* + * + * OTHER FUNCTIONS EXPORTED TO THE STACK + * + **********************************************************************/ + +static void +iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag) +{ + if_ctx_t ctx = if_getsoftc(ifp); + + if ((void *)ctx != arg) + return; + + if ((vtag == 0) || (vtag > 4095)) + return; + + CTX_LOCK(ctx); + IFDI_VLAN_REGISTER(ctx, vtag); + /* Re-init to load the changes */ + if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) + iflib_init_locked(ctx); + CTX_UNLOCK(ctx); +} + +static void +iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag) +{ + if_ctx_t ctx = if_getsoftc(ifp); + + if ((void *)ctx != arg) + return; + + if ((vtag == 0) || (vtag > 4095)) + return; + + CTX_LOCK(ctx); + IFDI_VLAN_UNREGISTER(ctx, vtag); + /* Re-init to load the changes */ + if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) + iflib_init_locked(ctx); + CTX_UNLOCK(ctx); +} + +static void +iflib_led_func(void *arg, int onoff) +{ + if_ctx_t ctx = arg; + + CTX_LOCK(ctx); + IFDI_LED_FUNC(ctx, onoff); + CTX_UNLOCK(ctx); +} + +/********************************************************************* + * + * BUS FUNCTION DEFINITIONS + * + **********************************************************************/ + +int +iflib_device_probe(device_t dev) +{ + pci_vendor_info_t *ent; + + uint16_t pci_vendor_id, pci_device_id; + uint16_t pci_subvendor_id, pci_subdevice_id; + uint16_t pci_rev_id; + if_shared_ctx_t sctx; + + if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) + return (ENOTSUP); + + pci_vendor_id = pci_get_vendor(dev); + pci_device_id = pci_get_device(dev); + pci_subvendor_id = pci_get_subvendor(dev); + pci_subdevice_id = pci_get_subdevice(dev); + pci_rev_id = pci_get_revid(dev); + if (sctx->isc_parse_devinfo != NULL) + sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id); + + ent = sctx->isc_vendor_info; + while (ent->pvi_vendor_id != 0) { + if (pci_vendor_id != ent->pvi_vendor_id) { + ent++; + continue; + } + if ((pci_device_id == ent->pvi_device_id) && + ((pci_subvendor_id == ent->pvi_subvendor_id) || + (ent->pvi_subvendor_id == 0)) && + ((pci_subdevice_id == ent->pvi_subdevice_id) || + (ent->pvi_subdevice_id == 0)) && + ((pci_rev_id == ent->pvi_rev_id) || + (ent->pvi_rev_id == 0))) { + + device_set_desc_copy(dev, ent->pvi_name); + /* this needs to be changed to zero if the bus probing code + * ever stops re-probing on best match because the sctx + * may have its values over written by register calls + * in subsequent probes + */ + return (BUS_PROBE_DEFAULT); + } + ent++; + } + return (ENXIO); +} + +int +iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp) +{ + int err, rid, msix, msix_bar; + if_ctx_t ctx; + if_t ifp; + if_softc_ctx_t scctx; + + + ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO); + + if (sc == NULL) { + sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO); + device_set_softc(dev, ctx); + } + + ctx->ifc_sctx = sctx; + ctx->ifc_dev = dev; + ctx->ifc_txrx = *sctx->isc_txrx; + ctx->ifc_softc = sc; + + if ((err = iflib_register(ctx)) != 0) { + device_printf(dev, "iflib_register failed %d\n", err); + return (err); + } + iflib_add_device_sysctl_pre(ctx); + if ((err = IFDI_ATTACH_PRE(ctx)) != 0) { + device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err); + return (err); + } +#ifdef ACPI_DMAR + if (dmar_get_dma_tag(device_get_parent(dev), dev) != NULL) + ctx->ifc_flags |= IFC_DMAR; +#endif + + scctx = &ctx->ifc_softc_ctx; + msix_bar = scctx->isc_msix_bar; + + if (scctx->isc_tx_nsegments > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION) + scctx->isc_tx_nsegments = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION); + if (scctx->isc_tx_tso_segments_max > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION) + scctx->isc_tx_tso_segments_max = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION); + + ifp = ctx->ifc_ifp; + + /* + * XXX sanity check that ntxd & nrxd are a power of 2 + */ + + /* + * Protect the stack against modern hardware + */ + if (scctx->isc_tx_tso_size_max > FREEBSD_TSO_SIZE_MAX) + scctx->isc_tx_tso_size_max = FREEBSD_TSO_SIZE_MAX; + + /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */ + ifp->if_hw_tsomaxsegcount = scctx->isc_tx_tso_segments_max; + ifp->if_hw_tsomax = scctx->isc_tx_tso_size_max; + ifp->if_hw_tsomaxsegsize = scctx->isc_tx_tso_segsize_max; + if (scctx->isc_rss_table_size == 0) + scctx->isc_rss_table_size = 64; + scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;; + /* + ** Now setup MSI or MSI/X, should + ** return us the number of supported + ** vectors. (Will be 1 for MSI) + */ + if (sctx->isc_flags & IFLIB_SKIP_MSIX) { + msix = scctx->isc_vectors; + } else if (scctx->isc_msix_bar != 0) + msix = iflib_msix_init(ctx); + else { + scctx->isc_vectors = 1; + scctx->isc_ntxqsets = 1; + scctx->isc_nrxqsets = 1; + scctx->isc_intr = IFLIB_INTR_LEGACY; + msix = 0; + } + /* Get memory for the station queues */ + if ((err = iflib_queues_alloc(ctx))) { + device_printf(dev, "Unable to allocate queue memory\n"); + goto fail; + } + + if ((err = iflib_qset_structures_setup(ctx))) { + device_printf(dev, "qset structure setup failed %d\n", err); + goto fail_queues; + } + + if (msix > 1 && (err = IFDI_MSIX_INTR_ASSIGN(ctx, msix)) != 0) { + device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", err); + goto fail_intr_free; + } + if (msix <= 1) { + rid = 0; + if (scctx->isc_intr == IFLIB_INTR_MSI) { + MPASS(msix == 1); + rid = 1; + } + if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx, &rid, "irq0")) != 0) { + device_printf(dev, "iflib_legacy_setup failed %d\n", err); + goto fail_intr_free; + } + } + ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac); + if ((err = IFDI_ATTACH_POST(ctx)) != 0) { + device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); + goto fail_detach; + } + if ((err = iflib_netmap_attach(ctx))) { + device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err); + goto fail_detach; + } + *ctxp = ctx; + + iflib_add_device_sysctl_post(ctx); + return (0); +fail_detach: + ether_ifdetach(ctx->ifc_ifp); +fail_intr_free: + if (scctx->isc_intr == IFLIB_INTR_MSIX || scctx->isc_intr == IFLIB_INTR_MSI) + pci_release_msi(ctx->ifc_dev); +fail_queues: + /* XXX free queues */ +fail: + IFDI_DETACH(ctx); + return (err); +} + +int +iflib_device_attach(device_t dev) +{ + if_ctx_t ctx; + if_shared_ctx_t sctx; + + if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) + return (ENOTSUP); + + pci_enable_busmaster(dev); + + return (iflib_device_register(dev, NULL, sctx, &ctx)); +} + +int +iflib_device_deregister(if_ctx_t ctx) +{ + if_t ifp = ctx->ifc_ifp; + iflib_txq_t txq; + iflib_rxq_t rxq; + device_t dev = ctx->ifc_dev; + int i; + struct taskqgroup *tqg; + + /* Make sure VLANS are not using driver */ + if (if_vlantrunkinuse(ifp)) { + device_printf(dev,"Vlan in use, detach first\n"); + return (EBUSY); + } + + CTX_LOCK(ctx); + ctx->ifc_in_detach = 1; + iflib_stop(ctx); + CTX_UNLOCK(ctx); + + /* Unregister VLAN events */ + if (ctx->ifc_vlan_attach_event != NULL) + EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event); + if (ctx->ifc_vlan_detach_event != NULL) + EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event); + + iflib_netmap_detach(ifp); + ether_ifdetach(ifp); + /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/ + CTX_LOCK_DESTROY(ctx); + if (ctx->ifc_led_dev != NULL) + led_destroy(ctx->ifc_led_dev); + /* XXX drain any dependent tasks */ + tqg = qgroup_if_io_tqg; + for (txq = ctx->ifc_txqs, i = 0, rxq = ctx->ifc_rxqs; i < NTXQSETS(ctx); i++, txq++) { + callout_drain(&txq->ift_timer); + callout_drain(&txq->ift_db_check); + if (txq->ift_task.gt_uniq != NULL) + taskqgroup_detach(tqg, &txq->ift_task); + } + for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { + if (rxq->ifr_task.gt_uniq != NULL) + taskqgroup_detach(tqg, &rxq->ifr_task); + } + tqg = qgroup_if_config_tqg; + if (ctx->ifc_admin_task.gt_uniq != NULL) + taskqgroup_detach(tqg, &ctx->ifc_admin_task); + if (ctx->ifc_vflr_task.gt_uniq != NULL) + taskqgroup_detach(tqg, &ctx->ifc_vflr_task); + + IFDI_DETACH(ctx); + if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) { + pci_release_msi(dev); + } + if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) { + iflib_irq_free(ctx, &ctx->ifc_legacy_irq); + } + if (ctx->ifc_msix_mem != NULL) { + bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY, + ctx->ifc_softc_ctx.isc_msix_bar, ctx->ifc_msix_mem); + ctx->ifc_msix_mem = NULL; + } + + bus_generic_detach(dev); + if_free(ifp); + + iflib_tx_structures_free(ctx); + iflib_rx_structures_free(ctx); + return (0); +} + + +int +iflib_device_detach(device_t dev) +{ + if_ctx_t ctx = device_get_softc(dev); + + return (iflib_device_deregister(ctx)); +} + +int +iflib_device_suspend(device_t dev) +{ + if_ctx_t ctx = device_get_softc(dev); + + CTX_LOCK(ctx); + IFDI_SUSPEND(ctx); + CTX_UNLOCK(ctx); + + return bus_generic_suspend(dev); +} +int +iflib_device_shutdown(device_t dev) +{ + if_ctx_t ctx = device_get_softc(dev); + + CTX_LOCK(ctx); + IFDI_SHUTDOWN(ctx); + CTX_UNLOCK(ctx); + + return bus_generic_suspend(dev); +} + + +int +iflib_device_resume(device_t dev) +{ + if_ctx_t ctx = device_get_softc(dev); + iflib_txq_t txq = ctx->ifc_txqs; + + CTX_LOCK(ctx); + IFDI_RESUME(ctx); + iflib_init_locked(ctx); + CTX_UNLOCK(ctx); + for (int i = 0; i < NTXQSETS(ctx); i++, txq++) + iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); + + return (bus_generic_resume(dev)); +} + +int +iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params) +{ + int error; + if_ctx_t ctx = device_get_softc(dev); + + CTX_LOCK(ctx); + error = IFDI_IOV_INIT(ctx, num_vfs, params); + CTX_UNLOCK(ctx); + + return (error); +} + +void +iflib_device_iov_uninit(device_t dev) +{ + if_ctx_t ctx = device_get_softc(dev); + + CTX_LOCK(ctx); + IFDI_IOV_UNINIT(ctx); + CTX_UNLOCK(ctx); +} + +int +iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params) +{ + int error; + if_ctx_t ctx = device_get_softc(dev); + + CTX_LOCK(ctx); + error = IFDI_IOV_VF_ADD(ctx, vfnum, params); + CTX_UNLOCK(ctx); + + return (error); +} + +/********************************************************************* + * + * MODULE FUNCTION DEFINITIONS + * + **********************************************************************/ + +/* + * - Start a fast taskqueue thread for each core + * - Start a taskqueue for control operations + */ +static int +iflib_module_init(void) +{ + return (0); +} + +static int +iflib_module_event_handler(module_t mod, int what, void *arg) +{ + int err; + + switch (what) { + case MOD_LOAD: + if ((err = iflib_module_init()) != 0) + return (err); + break; + case MOD_UNLOAD: + return (EBUSY); + default: + return (EOPNOTSUPP); + } + + return (0); +} + +/********************************************************************* + * + * PUBLIC FUNCTION DEFINITIONS + * ordered as in iflib.h + * + **********************************************************************/ + + +static void +_iflib_assert(if_shared_ctx_t sctx) +{ + MPASS(sctx->isc_tx_maxsize); + MPASS(sctx->isc_tx_maxsegsize); + + MPASS(sctx->isc_rx_maxsize); + MPASS(sctx->isc_rx_nsegments); + MPASS(sctx->isc_rx_maxsegsize); + + + MPASS(sctx->isc_txrx->ift_txd_encap); + MPASS(sctx->isc_txrx->ift_txd_flush); + MPASS(sctx->isc_txrx->ift_txd_credits_update); + MPASS(sctx->isc_txrx->ift_rxd_available); + MPASS(sctx->isc_txrx->ift_rxd_pkt_get); + MPASS(sctx->isc_txrx->ift_rxd_refill); + MPASS(sctx->isc_txrx->ift_rxd_flush); + MPASS(sctx->isc_nrxd); +} + +static int +iflib_register(if_ctx_t ctx) +{ + if_shared_ctx_t sctx = ctx->ifc_sctx; + driver_t *driver = sctx->isc_driver; + device_t dev = ctx->ifc_dev; + if_t ifp; + + _iflib_assert(sctx); + + CTX_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev)); + MPASS(ctx->ifc_flags == 0); + + ifp = ctx->ifc_ifp = if_gethandle(IFT_ETHER); + if (ifp == NULL) { + device_printf(dev, "can not allocate ifnet structure\n"); + return (ENOMEM); + } + + /* + * Initialize our context's device specific methods + */ + kobj_init((kobj_t) ctx, (kobj_class_t) driver); + kobj_class_compile((kobj_class_t) driver); + driver->refs++; + + if_initname(ifp, device_get_name(dev), device_get_unit(dev)); + if_setsoftc(ifp, ctx); + if_setdev(ifp, dev); + if_setinitfn(ifp, iflib_if_init); + if_setioctlfn(ifp, iflib_if_ioctl); + if_settransmitfn(ifp, iflib_if_transmit); + if_setqflushfn(ifp, iflib_if_qflush); + if_setgetcounterfn(ifp, iflib_if_get_counter); + if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); + + if_setcapabilities(ifp, 0); + if_setcapenable(ifp, 0); + + ctx->ifc_vlan_attach_event = + EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx, + EVENTHANDLER_PRI_FIRST); + ctx->ifc_vlan_detach_event = + EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx, + EVENTHANDLER_PRI_FIRST); + + ifmedia_init(&ctx->ifc_media, IFM_IMASK, + iflib_media_change, iflib_media_status); + + return (0); +} + + +static int +iflib_queues_alloc(if_ctx_t ctx) +{ + if_shared_ctx_t sctx = ctx->ifc_sctx; + device_t dev = ctx->ifc_dev; + int nrxqsets = ctx->ifc_softc_ctx.isc_nrxqsets; + int ntxqsets = ctx->ifc_softc_ctx.isc_ntxqsets; + iflib_txq_t txq; + iflib_rxq_t rxq; + iflib_fl_t fl = NULL; + int i, j, err, txconf, rxconf, fl_ifdi_offset; + iflib_dma_info_t ifdip; + uint32_t *rxqsizes = sctx->isc_rxqsizes; + uint32_t *txqsizes = sctx->isc_txqsizes; + uint8_t nrxqs = sctx->isc_nrxqs; + uint8_t ntxqs = sctx->isc_ntxqs; + int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1; + caddr_t *vaddrs; + uint64_t *paddrs; + struct ifmp_ring **brscp; + int nbuf_rings = 1; /* XXX determine dynamically */ + + KASSERT(ntxqs > 0, ("number of queues must be at least 1")); + KASSERT(nrxqs > 0, ("number of queues must be at least 1")); + +/* Allocate the TX ring struct memory */ + if (!(txq = + (iflib_txq_t) malloc(sizeof(struct iflib_txq) * + ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate TX ring memory\n"); + err = ENOMEM; + goto fail; + } + + /* Now allocate the RX */ + if (!(rxq = + (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) * + nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate RX ring memory\n"); + err = ENOMEM; + goto rx_fail; + } + if (!(brscp = malloc(sizeof(void *) * nbuf_rings * nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to buf_ring_sc * memory\n"); + err = ENOMEM; + goto rx_fail; + } + + ctx->ifc_txqs = txq; + ctx->ifc_rxqs = rxq; + + /* + * XXX handle allocation failure + */ + for (txconf = i = 0; i < ntxqsets; i++, txconf++, txq++) { + /* Set up some basics */ + + if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { + device_printf(dev, "failed to allocate iflib_dma_info\n"); + err = ENOMEM; + goto fail; + } + txq->ift_ifdi = ifdip; + for (j = 0; j < ntxqs; j++, ifdip++) { + if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, BUS_DMA_NOWAIT)) { + device_printf(dev, "Unable to allocate Descriptor memory\n"); + err = ENOMEM; + goto err_tx_desc; + } + bzero((void *)ifdip->idi_vaddr, txqsizes[j]); + } + txq->ift_ctx = ctx; + txq->ift_id = i; + /* XXX fix this */ + txq->ift_timer.c_cpu = i % mp_ncpus; + txq->ift_db_check.c_cpu = i % mp_ncpus; + txq->ift_nbr = nbuf_rings; + + if (iflib_txsd_alloc(txq)) { + device_printf(dev, "Critical Failure setting up TX buffers\n"); + err = ENOMEM; + goto err_tx_desc; + } + + /* Initialize the TX lock */ + snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:tx(%d):callout", + device_get_nameunit(dev), txq->ift_id); + mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF); + callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0); + callout_init_mtx(&txq->ift_db_check, &txq->ift_mtx, 0); + + snprintf(txq->ift_db_mtx_name, MTX_NAME_LEN, "%s:tx(%d):db", + device_get_nameunit(dev), txq->ift_id); + TXDB_LOCK_INIT(txq); + + txq->ift_br = brscp + i*nbuf_rings; + for (j = 0; j < nbuf_rings; j++) { + err = ifmp_ring_alloc(&txq->ift_br[j], 2048, txq, iflib_txq_drain, + iflib_txq_can_drain, M_IFLIB, M_WAITOK); + if (err) { + /* XXX free any allocated rings */ + device_printf(dev, "Unable to allocate buf_ring\n"); + goto fail; + } + } + } + + for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) { + /* Set up some basics */ + + if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { + device_printf(dev, "failed to allocate iflib_dma_info\n"); + err = ENOMEM; + goto fail; + } + + rxq->ifr_ifdi = ifdip; + for (j = 0; j < nrxqs; j++, ifdip++) { + if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, BUS_DMA_NOWAIT)) { + device_printf(dev, "Unable to allocate Descriptor memory\n"); + err = ENOMEM; + goto err_tx_desc; + } + bzero((void *)ifdip->idi_vaddr, rxqsizes[j]); + } + rxq->ifr_ctx = ctx; + rxq->ifr_id = i; + if (sctx->isc_flags & IFLIB_HAS_CQ) { + fl_ifdi_offset = 1; + } else { + fl_ifdi_offset = 0; + } + rxq->ifr_nfl = nfree_lists; + if (!(fl = + (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) { + device_printf(dev, "Unable to allocate free list memory\n"); + err = ENOMEM; + goto fail; + } + rxq->ifr_fl = fl; + for (j = 0; j < nfree_lists; j++) { + rxq->ifr_fl[j].ifl_rxq = rxq; + rxq->ifr_fl[j].ifl_id = j; + rxq->ifr_fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + fl_ifdi_offset]; + } + /* Allocate receive buffers for the ring*/ + if (iflib_rxsd_alloc(rxq)) { + device_printf(dev, + "Critical Failure setting up receive buffers\n"); + err = ENOMEM; + goto err_rx_desc; + } + } + + /* TXQs */ + vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); + paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); + for (i = 0; i < ntxqsets; i++) { + iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi; + + for (j = 0; j < ntxqs; j++, di++) { + vaddrs[i*ntxqs + j] = di->idi_vaddr; + paddrs[i*ntxqs + j] = di->idi_paddr; + } + } + if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) { + device_printf(ctx->ifc_dev, "device queue allocation failed\n"); + iflib_tx_structures_free(ctx); + free(vaddrs, M_IFLIB); + free(paddrs, M_IFLIB); + goto err_rx_desc; + } + free(vaddrs, M_IFLIB); + free(paddrs, M_IFLIB); + + /* RXQs */ + vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); + paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); + for (i = 0; i < nrxqsets; i++) { + iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi; + + for (j = 0; j < nrxqs; j++, di++) { + vaddrs[i*nrxqs + j] = di->idi_vaddr; + paddrs[i*nrxqs + j] = di->idi_paddr; + } + } + if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) { + device_printf(ctx->ifc_dev, "device queue allocation failed\n"); + iflib_tx_structures_free(ctx); + free(vaddrs, M_IFLIB); + free(paddrs, M_IFLIB); + goto err_rx_desc; + } + free(vaddrs, M_IFLIB); + free(paddrs, M_IFLIB); + + return (0); + +/* XXX handle allocation failure changes */ +err_rx_desc: +err_tx_desc: + if (ctx->ifc_rxqs != NULL) + free(ctx->ifc_rxqs, M_IFLIB); + ctx->ifc_rxqs = NULL; +rx_fail: + if (ctx->ifc_txqs != NULL) + free(ctx->ifc_txqs, M_IFLIB); + ctx->ifc_txqs = NULL; +fail: + return (err); +} + +static int +iflib_tx_structures_setup(if_ctx_t ctx) +{ + iflib_txq_t txq = ctx->ifc_txqs; + int i; + + for (i = 0; i < NTXQSETS(ctx); i++, txq++) + iflib_txq_setup(txq); + + return (0); +} + +static void +iflib_tx_structures_free(if_ctx_t ctx) +{ + iflib_txq_t txq = ctx->ifc_txqs; + int i, j; + + for (i = 0; i < NTXQSETS(ctx); i++, txq++) { + iflib_txq_destroy(txq); + for (j = 0; j < ctx->ifc_nhwtxqs; j++) + iflib_dma_free(&txq->ift_ifdi[j]); + } + free(ctx->ifc_txqs, M_IFLIB); + ctx->ifc_txqs = NULL; + IFDI_QUEUES_FREE(ctx); +} + +/********************************************************************* + * + * Initialize all receive rings. + * + **********************************************************************/ +static int +iflib_rx_structures_setup(if_ctx_t ctx) +{ + iflib_rxq_t rxq = ctx->ifc_rxqs; + int i, q, err; + + for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) { + tcp_lro_free(&rxq->ifr_lc); + if ((err = tcp_lro_init(&rxq->ifr_lc)) != 0) { + device_printf(ctx->ifc_dev, "LRO Initialization failed!\n"); + goto fail; + } + rxq->ifr_lro_enabled = TRUE; + rxq->ifr_lc.ifp = ctx->ifc_ifp; + IFDI_RXQ_SETUP(ctx, rxq->ifr_id); + } + return (0); +fail: + /* + * Free RX software descriptors allocated so far, we will only handle + * the rings that completed, the failing case will have + * cleaned up for itself. 'q' failed, so its the terminus. + */ + rxq = ctx->ifc_rxqs; + for (i = 0; i < q; ++i, rxq++) { + iflib_rx_sds_free(rxq); + rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; + } + return (err); +} + +/********************************************************************* + * + * Free all receive rings. + * + **********************************************************************/ +static void +iflib_rx_structures_free(if_ctx_t ctx) +{ + iflib_rxq_t rxq = ctx->ifc_rxqs; + + for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, rxq++) { + iflib_rx_sds_free(rxq); + } +} + +static int +iflib_qset_structures_setup(if_ctx_t ctx) +{ + int err; + + if ((err = iflib_tx_structures_setup(ctx)) != 0) + return (err); + + if ((err = iflib_rx_structures_setup(ctx)) != 0) { + device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err); + iflib_tx_structures_free(ctx); + iflib_rx_structures_free(ctx); + } + return (err); +} + +int +iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, + driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, char *name) +{ + + return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name)); +} + +static void +find_nth(if_ctx_t ctx, cpuset_t *cpus, int qid) +{ + int i, cpuid; + + CPU_COPY(&ctx->ifc_cpus, cpus); + /* clear up to the qid'th bit */ + for (i = 0; i < qid; i++) { + cpuid = CPU_FFS(cpus); + CPU_CLR(cpuid, cpus); + } +} + +int +iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, + iflib_intr_type_t type, driver_filter_t *filter, + void *filter_arg, int qid, char *name) +{ + struct grouptask *gtask; + struct taskqgroup *tqg; + iflib_filter_info_t info; + cpuset_t cpus; + task_fn_t *fn; + int tqrid, err; + void *q; + + info = &ctx->ifc_filter_info; + + switch (type) { + /* XXX merge tx/rx for netmap? */ + case IFLIB_INTR_TX: + q = &ctx->ifc_txqs[qid]; + info = &ctx->ifc_txqs[qid].ift_filter_info; + gtask = &ctx->ifc_txqs[qid].ift_task; + tqg = qgroup_if_io_tqg; + tqrid = irq->ii_rid; + fn = _task_fn_tx; + break; + case IFLIB_INTR_RX: + q = &ctx->ifc_rxqs[qid]; + info = &ctx->ifc_rxqs[qid].ifr_filter_info; + gtask = &ctx->ifc_rxqs[qid].ifr_task; + tqg = qgroup_if_io_tqg; + tqrid = irq->ii_rid; + fn = _task_fn_rx; + break; + case IFLIB_INTR_ADMIN: + q = ctx; + info = &ctx->ifc_filter_info; + gtask = &ctx->ifc_admin_task; + tqg = qgroup_if_config_tqg; + tqrid = -1; + fn = _task_fn_admin; + break; + default: + panic("unknown net intr type"); + } + GROUPTASK_INIT(gtask, 0, fn, q); + + info->ifi_filter = filter; + info->ifi_filter_arg = filter_arg; + info->ifi_task = gtask; + + /* XXX query cpu that rid belongs to */ + + err = _iflib_irq_alloc(ctx, irq, rid, iflib_fast_intr, NULL, info, name); + if (err != 0) + return (err); + if (tqrid != -1) { + find_nth(ctx, &cpus, qid); + taskqgroup_attach_cpu(tqg, gtask, q, CPU_FFS(&cpus), irq->ii_rid, name); + } else + taskqgroup_attach(tqg, gtask, q, tqrid, name); + + + return (0); +} + +void +iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name) +{ + struct grouptask *gtask; + struct taskqgroup *tqg; + task_fn_t *fn; + void *q; + + switch (type) { + case IFLIB_INTR_TX: + q = &ctx->ifc_txqs[qid]; + gtask = &ctx->ifc_txqs[qid].ift_task; + tqg = qgroup_if_io_tqg; + fn = _task_fn_tx; + break; + case IFLIB_INTR_RX: + q = &ctx->ifc_rxqs[qid]; + gtask = &ctx->ifc_rxqs[qid].ifr_task; + tqg = qgroup_if_io_tqg; + fn = _task_fn_rx; + break; + case IFLIB_INTR_ADMIN: + q = ctx; + gtask = &ctx->ifc_admin_task; + tqg = qgroup_if_config_tqg; + rid = -1; + fn = _task_fn_admin; + break; + case IFLIB_INTR_IOV: + q = ctx; + gtask = &ctx->ifc_vflr_task; + tqg = qgroup_if_config_tqg; + rid = -1; + fn = _task_fn_iov; + break; + default: + panic("unknown net intr type"); + } + GROUPTASK_INIT(gtask, 0, fn, q); + taskqgroup_attach(tqg, gtask, q, rid, name); +} + +void +iflib_irq_free(if_ctx_t ctx, if_irq_t irq) +{ + if (irq->ii_tag) + bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag); + + if (irq->ii_res) + bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, irq->ii_rid, irq->ii_res); +} + +static int +iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, char *name) +{ + iflib_txq_t txq = ctx->ifc_txqs; + iflib_rxq_t rxq = ctx->ifc_rxqs; + if_irq_t irq = &ctx->ifc_legacy_irq; + iflib_filter_info_t info; + struct grouptask *gtask; + struct taskqgroup *tqg; + task_fn_t *fn; + int tqrid; + void *q; + int err; + + q = &ctx->ifc_rxqs[0]; + info = &rxq[0].ifr_filter_info; + gtask = &rxq[0].ifr_task; + tqg = qgroup_if_io_tqg; + tqrid = irq->ii_rid = *rid; + fn = _task_fn_rx; + + ctx->ifc_flags |= IFC_LEGACY; + info->ifi_filter = filter; + info->ifi_filter_arg = filter_arg; + info->ifi_task = gtask; + + /* We allocate a single interrupt resource */ + if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr, NULL, info, name)) != 0) + return (err); + GROUPTASK_INIT(gtask, 0, fn, q); + taskqgroup_attach(tqg, gtask, q, tqrid, name); + + GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq); + taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, tqrid, "tx"); + GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx); + taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, -1, "admin/link"); + + return (0); +} + +void +iflib_led_create(if_ctx_t ctx) +{ + + ctx->ifc_led_dev = led_create(iflib_led_func, ctx, + device_get_nameunit(ctx->ifc_dev)); +} + +void +iflib_tx_intr_deferred(if_ctx_t ctx, int txqid) +{ + + GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task); +} + +void +iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid) +{ + + GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task); +} + +void +iflib_admin_intr_deferred(if_ctx_t ctx) +{ + + GROUPTASK_ENQUEUE(&ctx->ifc_admin_task); +} + +void +iflib_iov_intr_deferred(if_ctx_t ctx) +{ + + GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task); +} + +void +iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name) +{ + + taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, -1, name); +} + +void +iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, task_fn_t *fn, + char *name) +{ + + GROUPTASK_INIT(gtask, 0, fn, ctx); + taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, -1, name); +} + +void +iflib_link_state_change(if_ctx_t ctx, int link_state) +{ + if_t ifp = ctx->ifc_ifp; + iflib_txq_t txq = ctx->ifc_txqs; + +#if 0 + if_setbaudrate(ifp, baudrate); +#endif + /* If link down, disable watchdog */ + if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) { + for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++) + txq->ift_qstatus = IFLIB_QUEUE_IDLE; + } + ctx->ifc_link_state = link_state; + if_link_state_change(ifp, link_state); +} + +static int +iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq) +{ + int credits; + + if (ctx->isc_txd_credits_update == NULL) + return (0); + + if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, true)) == 0) + return (0); + + txq->ift_processed += credits; + txq->ift_cidx_processed += credits; + + if (txq->ift_cidx_processed >= txq->ift_size) + txq->ift_cidx_processed -= txq->ift_size; + return (credits); +} + +static int +iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx) +{ + + return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx)); +} + +void +iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name, + const char *description, if_int_delay_info_t info, + int offset, int value) +{ + info->iidi_ctx = ctx; + info->iidi_offset = offset; + info->iidi_value = value; + SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)), + OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, + info, 0, iflib_sysctl_int_delay, "I", description); +} + +struct mtx * +iflib_ctx_lock_get(if_ctx_t ctx) +{ + + return (&ctx->ifc_mtx); +} + +static int +iflib_msix_init(if_ctx_t ctx) +{ + device_t dev = ctx->ifc_dev; + if_shared_ctx_t sctx = ctx->ifc_sctx; + if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; + int vectors, queues, rx_queues, tx_queues, queuemsgs, msgs; + int iflib_num_tx_queues, iflib_num_rx_queues; + int err, admincnt, bar; + + iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs; + iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs; + bar = ctx->ifc_softc_ctx.isc_msix_bar; + admincnt = sctx->isc_admin_intrcnt; + /* Override by tuneable */ + if (enable_msix == 0) + goto msi; + + /* + ** When used in a virtualized environment + ** PCI BUSMASTER capability may not be set + ** so explicity set it here and rewrite + ** the ENABLE in the MSIX control register + ** at this point to cause the host to + ** successfully initialize us. + */ + { + uint16_t pci_cmd_word; + int msix_ctrl, rid; + + rid = 0; + pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2); + pci_cmd_word |= PCIM_CMD_BUSMASTEREN; + pci_write_config(dev, PCIR_COMMAND, pci_cmd_word, 2); + pci_find_cap(dev, PCIY_MSIX, &rid); + rid += PCIR_MSIX_CTRL; + msix_ctrl = pci_read_config(dev, rid, 2); + msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE; + pci_write_config(dev, rid, msix_ctrl, 2); + } + + /* + * bar == -1 => "trust me I know what I'm doing" + * https://www.youtube.com/watch?v=nnwWKkNau4I + * Some drivers are for hardware that is so shoddily + * documented that no one knows which bars are which + * so the developer has to map all bars. This hack + * allows shoddy garbage to use msix in this framework. + */ + if (bar != -1) { + ctx->ifc_msix_mem = bus_alloc_resource_any(dev, + SYS_RES_MEMORY, &bar, RF_ACTIVE); + if (ctx->ifc_msix_mem == NULL) { + /* May not be enabled */ + device_printf(dev, "Unable to map MSIX table \n"); + goto msi; + } + } + /* First try MSI/X */ + if ((msgs = pci_msix_count(dev)) == 0) { /* system has msix disabled */ + device_printf(dev, "System has MSIX disabled \n"); + bus_release_resource(dev, SYS_RES_MEMORY, + bar, ctx->ifc_msix_mem); + ctx->ifc_msix_mem = NULL; + goto msi; + } +#if IFLIB_DEBUG + /* use only 1 qset in debug mode */ + queuemsgs = min(msgs - admincnt, 1); +#else + queuemsgs = msgs - admincnt; +#endif + if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) == 0) { +#ifdef RSS + queues = imin(queuemsgs, rss_getnumbuckets()); +#else + queues = queuemsgs; +#endif + queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues); + device_printf(dev, "pxm cpus: %d queue msgs: %d admincnt: %d\n", + CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt); + } else { + device_printf(dev, "Unable to fetch CPU list\n"); + /* Figure out a reasonable auto config value */ + queues = min(queuemsgs, mp_ncpus); + } +#ifdef RSS + /* If we're doing RSS, clamp at the number of RSS buckets */ + if (queues > rss_getnumbuckets()) + queues = rss_getnumbuckets(); +#endif + if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queues) + queues = rx_queues = iflib_num_rx_queues; + else + rx_queues = queues; + if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues) + tx_queues = iflib_num_tx_queues; + else + tx_queues = queues; + + device_printf(dev, "using %d rx queues %d tx queues \n", rx_queues, tx_queues); + + vectors = queues + admincnt; + if ((err = pci_alloc_msix(dev, &vectors)) == 0) { + device_printf(dev, + "Using MSIX interrupts with %d vectors\n", vectors); + scctx->isc_vectors = vectors; + scctx->isc_nrxqsets = rx_queues; + scctx->isc_ntxqsets = tx_queues; + scctx->isc_intr = IFLIB_INTR_MSIX; + return (vectors); + } else { + device_printf(dev, "failed to allocate %d msix vectors, err: %d - using MSI\n", vectors, err); + } +msi: + vectors = pci_msi_count(dev); + scctx->isc_nrxqsets = 1; + scctx->isc_ntxqsets = 1; + scctx->isc_vectors = vectors; + if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) { + device_printf(dev,"Using an MSI interrupt\n"); + scctx->isc_intr = IFLIB_INTR_MSI; + } else { + device_printf(dev,"Using a Legacy interrupt\n"); + scctx->isc_intr = IFLIB_INTR_LEGACY; + } + + return (vectors); +} + +char * ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" }; + +static int +mp_ring_state_handler(SYSCTL_HANDLER_ARGS) +{ + int rc; + uint16_t *state = ((uint16_t *)oidp->oid_arg1); + struct sbuf *sb; + char *ring_state = "UNKNOWN"; + + /* XXX needed ? */ + rc = sysctl_wire_old_buffer(req, 0); + MPASS(rc == 0); + if (rc != 0) + return (rc); + sb = sbuf_new_for_sysctl(NULL, NULL, 80, req); + MPASS(sb != NULL); + if (sb == NULL) + return (ENOMEM); + if (state[3] <= 3) + ring_state = ring_states[state[3]]; + + sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s", + state[0], state[1], state[2], ring_state); + rc = sbuf_finish(sb); + sbuf_delete(sb); + return(rc); +} + + + +#define NAME_BUFLEN 32 +static void +iflib_add_device_sysctl_pre(if_ctx_t ctx) +{ + device_t dev = iflib_get_dev(ctx); + struct sysctl_oid_list *child, *oid_list; + struct sysctl_ctx_list *ctx_list; + struct sysctl_oid *node; + + ctx_list = device_get_sysctl_ctx(dev); + child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); + ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib", + CTLFLAG_RD, NULL, "IFLIB fields"); + oid_list = SYSCTL_CHILDREN(node); + + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs", + CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, + "# of txqs to use, 0 => use default #"); + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs", + CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, + "# of txqs to use, 0 => use default #"); + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxds", + CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxds, 0, + "# of tx descriptors to use, 0 => use default #"); + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxds", + CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxds, 0, + "# of rx descriptors to use, 0 => use default #"); + +} + +static void +iflib_add_device_sysctl_post(if_ctx_t ctx) +{ + if_shared_ctx_t sctx = ctx->ifc_sctx; + if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; + device_t dev = iflib_get_dev(ctx); + struct sysctl_oid_list *child; + struct sysctl_ctx_list *ctx_list; + iflib_fl_t fl; + iflib_txq_t txq; + iflib_rxq_t rxq; + int i, j; + char namebuf[NAME_BUFLEN]; + char *qfmt; + struct sysctl_oid *queue_node, *fl_node, *node; + struct sysctl_oid_list *queue_list, *fl_list; + ctx_list = device_get_sysctl_ctx(dev); + + node = ctx->ifc_sysctl_node; + child = SYSCTL_CHILDREN(node); + + if (scctx->isc_ntxqsets > 100) + qfmt = "txq%03d"; + else if (scctx->isc_ntxqsets > 10) + qfmt = "txq%02d"; + else + qfmt = "txq%d"; + for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) { + snprintf(namebuf, NAME_BUFLEN, qfmt, i); + queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, + CTLFLAG_RD, NULL, "Queue Name"); + queue_list = SYSCTL_CHILDREN(queue_node); +#if MEMORY_LOGGING + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued", + CTLFLAG_RD, + &txq->ift_dequeued, "total mbufs freed"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued", + CTLFLAG_RD, + &txq->ift_enqueued, "total mbufs enqueued"); +#endif + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag", + CTLFLAG_RD, + &txq->ift_mbuf_defrag, "# of times m_defrag was called"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups", + CTLFLAG_RD, + &txq->ift_pullups, "# of times m_pullup was called"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed", + CTLFLAG_RD, + &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail", + CTLFLAG_RD, + &txq->ift_mbuf_defrag_failed, "# of times no descriptors were available"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed", + CTLFLAG_RD, + &txq->ift_map_failed, "# of times dma map failed"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig", + CTLFLAG_RD, + &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup", + CTLFLAG_RD, + &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG"); + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx", + CTLFLAG_RD, + &txq->ift_pidx, 1, "Producer Index"); + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx", + CTLFLAG_RD, + &txq->ift_cidx, 1, "Consumer Index"); + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed", + CTLFLAG_RD, + &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update"); + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use", + CTLFLAG_RD, + &txq->ift_in_use, 1, "descriptors in use"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed", + CTLFLAG_RD, + &txq->ift_processed, "descriptors procesed for clean"); + SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned", + CTLFLAG_RD, + &txq->ift_cleaned, "total cleaned"); + SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state", + CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br[0]->state), + 0, mp_ring_state_handler, "A", "soft ring state"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues", + CTLFLAG_RD, &txq->ift_br[0]->enqueues, + "# of enqueues to the mp_ring for this queue"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops", + CTLFLAG_RD, &txq->ift_br[0]->drops, + "# of drops in the mp_ring for this queue"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts", + CTLFLAG_RD, &txq->ift_br[0]->starts, + "# of normal consumer starts in the mp_ring for this queue"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls", + CTLFLAG_RD, &txq->ift_br[0]->stalls, + "# of consumer stalls in the mp_ring for this queue"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts", + CTLFLAG_RD, &txq->ift_br[0]->restarts, + "# of consumer restarts in the mp_ring for this queue"); + SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications", + CTLFLAG_RD, &txq->ift_br[0]->abdications, + "# of consumer abdications in the mp_ring for this queue"); + + } + + if (scctx->isc_nrxqsets > 100) + qfmt = "rxq%03d"; + else if (scctx->isc_nrxqsets > 10) + qfmt = "rxq%02d"; + else + qfmt = "rxq%d"; + for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) { + snprintf(namebuf, NAME_BUFLEN, qfmt, i); + queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, + CTLFLAG_RD, NULL, "Queue Name"); + queue_list = SYSCTL_CHILDREN(queue_node); + if (sctx->isc_flags & IFLIB_HAS_CQ) { + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_pidx", + CTLFLAG_RD, + &rxq->ifr_cq_pidx, 1, "Producer Index"); + SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx", + CTLFLAG_RD, + &rxq->ifr_cq_cidx, 1, "Consumer Index"); + } + for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { + snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j); + fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf, + CTLFLAG_RD, NULL, "freelist Name"); + fl_list = SYSCTL_CHILDREN(fl_node); + SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx", + CTLFLAG_RD, + &fl->ifl_pidx, 1, "Producer Index"); + SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx", + CTLFLAG_RD, + &fl->ifl_cidx, 1, "Consumer Index"); + SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits", + CTLFLAG_RD, + &fl->ifl_credits, 1, "credits available"); +#if MEMORY_LOGGING + SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued", + CTLFLAG_RD, + &fl->ifl_m_enqueued, "mbufs allocated"); + SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued", + CTLFLAG_RD, + &fl->ifl_m_dequeued, "mbufs freed"); + SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued", + CTLFLAG_RD, + &fl->ifl_cl_enqueued, "clusters allocated"); + SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued", + CTLFLAG_RD, + &fl->ifl_cl_dequeued, "clusters freed"); +#endif + + } + } + +} Index: sys/net/mp_ring.h =================================================================== --- /dev/null +++ sys/net/mp_ring.h @@ -0,0 +1,71 @@ +/*- + * Copyright (c) 2014 Chelsio Communications, Inc. + * All rights reserved. + * Written by: Navdeep Parhar + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + * + */ + +#ifndef __NET_MP_RING_H +#define __NET_MP_RING_H + +#ifndef _KERNEL +#error "no user-serviceable parts inside" +#endif + +struct ifmp_ring; +typedef u_int (*mp_ring_drain_t)(struct ifmp_ring *, u_int, u_int); +typedef u_int (*mp_ring_can_drain_t)(struct ifmp_ring *); +typedef void (*mp_ring_serial_t)(struct ifmp_ring *); + +struct ifmp_ring { + volatile uint64_t state __aligned(CACHE_LINE_SIZE); + + int size __aligned(CACHE_LINE_SIZE); + void * cookie; + struct malloc_type * mt; + mp_ring_drain_t drain; + mp_ring_can_drain_t can_drain; /* cheap, may be unreliable */ + counter_u64_t enqueues; + counter_u64_t drops; + counter_u64_t starts; + counter_u64_t stalls; + counter_u64_t restarts; /* recovered after stalling */ + counter_u64_t abdications; +#ifdef NO_64BIT_ATOMICS + struct mtx lock; +#endif + void * volatile items[] __aligned(CACHE_LINE_SIZE); +}; + +int ifmp_ring_alloc(struct ifmp_ring **, int, void *, mp_ring_drain_t, + mp_ring_can_drain_t, struct malloc_type *, int); +void ifmp_ring_free(struct ifmp_ring *); +int ifmp_ring_enqueue(struct ifmp_ring *, void **, int, int); +void ifmp_ring_check_drainage(struct ifmp_ring *, int); +void ifmp_ring_reset_stats(struct ifmp_ring *); +int ifmp_ring_is_idle(struct ifmp_ring *); +int ifmp_ring_is_stalled(struct ifmp_ring *r); +#endif Index: sys/net/mp_ring.c =================================================================== --- /dev/null +++ sys/net/mp_ring.c @@ -0,0 +1,542 @@ +/*- + * Copyright (c) 2014 Chelsio Communications, Inc. + * All rights reserved. + * Written by: Navdeep Parhar + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include +#include + + + +#include + +#if defined(__i386__) +#define atomic_cmpset_acq_64 atomic_cmpset_64 +#define atomic_cmpset_rel_64 atomic_cmpset_64 +#endif + +union ring_state { + struct { + uint16_t pidx_head; + uint16_t pidx_tail; + uint16_t cidx; + uint16_t flags; + }; + uint64_t state; +}; + +enum { + IDLE = 0, /* consumer ran to completion, nothing more to do. */ + BUSY, /* consumer is running already, or will be shortly. */ + STALLED, /* consumer stopped due to lack of resources. */ + ABDICATED, /* consumer stopped even though there was work to be + done because it wants another thread to take over. */ +}; + +static inline uint16_t +space_available(struct ifmp_ring *r, union ring_state s) +{ + uint16_t x = r->size - 1; + + if (s.cidx == s.pidx_head) + return (x); + else if (s.cidx > s.pidx_head) + return (s.cidx - s.pidx_head - 1); + else + return (x - s.pidx_head + s.cidx); +} + +static inline uint16_t +increment_idx(struct ifmp_ring *r, uint16_t idx, uint16_t n) +{ + int x = r->size - idx; + + MPASS(x > 0); + return (x > n ? idx + n : n - x); +} + +/* Consumer is about to update the ring's state to s */ +static inline uint16_t +state_to_flags(union ring_state s, int abdicate) +{ + + if (s.cidx == s.pidx_tail) + return (IDLE); + else if (abdicate && s.pidx_tail != s.pidx_head) + return (ABDICATED); + + return (BUSY); +} + +#ifdef NO_64BIT_ATOMICS +static void +drain_ring_locked(struct ifmp_ring *r, union ring_state os, uint16_t prev, int budget) +{ + union ring_state ns; + int n, pending, total; + uint16_t cidx = os.cidx; + uint16_t pidx = os.pidx_tail; + + MPASS(os.flags == BUSY); + MPASS(cidx != pidx); + + if (prev == IDLE) + counter_u64_add(r->starts, 1); + pending = 0; + total = 0; + + while (cidx != pidx) { + + /* Items from cidx to pidx are available for consumption. */ + n = r->drain(r, cidx, pidx); + if (n == 0) { + os.state = ns.state = r->state; + ns.cidx = cidx; + ns.flags = STALLED; + r->state = ns.state; + if (prev != STALLED) + counter_u64_add(r->stalls, 1); + else if (total > 0) { + counter_u64_add(r->restarts, 1); + counter_u64_add(r->stalls, 1); + } + break; + } + cidx = increment_idx(r, cidx, n); + pending += n; + total += n; + + /* + * We update the cidx only if we've caught up with the pidx, the + * real cidx is getting too far ahead of the one visible to + * everyone else, or we have exceeded our budget. + */ + if (cidx != pidx && pending < 64 && total < budget) + continue; + + os.state = ns.state = r->state; + ns.cidx = cidx; + ns.flags = state_to_flags(ns, total >= budget); + r->state = ns.state; + + if (ns.flags == ABDICATED) + counter_u64_add(r->abdications, 1); + if (ns.flags != BUSY) { + /* Wrong loop exit if we're going to stall. */ + MPASS(ns.flags != STALLED); + if (prev == STALLED) { + MPASS(total > 0); + counter_u64_add(r->restarts, 1); + } + break; + } + + /* + * The acquire style atomic above guarantees visibility of items + * associated with any pidx change that we notice here. + */ + pidx = ns.pidx_tail; + pending = 0; + } +} +#else +/* + * Caller passes in a state, with a guarantee that there is work to do and that + * all items up to the pidx_tail in the state are visible. + */ +static void +drain_ring_lockless(struct ifmp_ring *r, union ring_state os, uint16_t prev, int budget) +{ + union ring_state ns; + int n, pending, total; + uint16_t cidx = os.cidx; + uint16_t pidx = os.pidx_tail; + + MPASS(os.flags == BUSY); + MPASS(cidx != pidx); + + if (prev == IDLE) + counter_u64_add(r->starts, 1); + pending = 0; + total = 0; + + while (cidx != pidx) { + + /* Items from cidx to pidx are available for consumption. */ + n = r->drain(r, cidx, pidx); + if (n == 0) { + critical_enter(); + do { + os.state = ns.state = r->state; + ns.cidx = cidx; + ns.flags = STALLED; + } while (atomic_cmpset_64(&r->state, os.state, + ns.state) == 0); + critical_exit(); + if (prev != STALLED) + counter_u64_add(r->stalls, 1); + else if (total > 0) { + counter_u64_add(r->restarts, 1); + counter_u64_add(r->stalls, 1); + } + break; + } + cidx = increment_idx(r, cidx, n); + pending += n; + total += n; + + /* + * We update the cidx only if we've caught up with the pidx, the + * real cidx is getting too far ahead of the one visible to + * everyone else, or we have exceeded our budget. + */ + if (cidx != pidx && pending < 64 && total < budget) + continue; + critical_enter(); + do { + os.state = ns.state = r->state; + ns.cidx = cidx; + ns.flags = state_to_flags(ns, total >= budget); + } while (atomic_cmpset_acq_64(&r->state, os.state, ns.state) == 0); + critical_exit(); + + if (ns.flags == ABDICATED) + counter_u64_add(r->abdications, 1); + if (ns.flags != BUSY) { + /* Wrong loop exit if we're going to stall. */ + MPASS(ns.flags != STALLED); + if (prev == STALLED) { + MPASS(total > 0); + counter_u64_add(r->restarts, 1); + } + break; + } + + /* + * The acquire style atomic above guarantees visibility of items + * associated with any pidx change that we notice here. + */ + pidx = ns.pidx_tail; + pending = 0; + } +} +#endif + +int +ifmp_ring_alloc(struct ifmp_ring **pr, int size, void *cookie, mp_ring_drain_t drain, + mp_ring_can_drain_t can_drain, struct malloc_type *mt, int flags) +{ + struct ifmp_ring *r; + + /* All idx are 16b so size can be 65536 at most */ + if (pr == NULL || size < 2 || size > 65536 || drain == NULL || + can_drain == NULL) + return (EINVAL); + *pr = NULL; + flags &= M_NOWAIT | M_WAITOK; + MPASS(flags != 0); + + r = malloc(__offsetof(struct ifmp_ring, items[size]), mt, flags | M_ZERO); + if (r == NULL) + return (ENOMEM); + r->size = size; + r->cookie = cookie; + r->mt = mt; + r->drain = drain; + r->can_drain = can_drain; + r->enqueues = counter_u64_alloc(flags); + r->drops = counter_u64_alloc(flags); + r->starts = counter_u64_alloc(flags); + r->stalls = counter_u64_alloc(flags); + r->restarts = counter_u64_alloc(flags); + r->abdications = counter_u64_alloc(flags); + if (r->enqueues == NULL || r->drops == NULL || r->starts == NULL || + r->stalls == NULL || r->restarts == NULL || + r->abdications == NULL) { + ifmp_ring_free(r); + return (ENOMEM); + } + + *pr = r; +#ifdef NO_64BIT_ATOMICS + mtx_init(&r->lock, "mp_ring lock", NULL, MTX_DEF); +#endif + return (0); +} + +void +ifmp_ring_free(struct ifmp_ring *r) +{ + + if (r == NULL) + return; + + if (r->enqueues != NULL) + counter_u64_free(r->enqueues); + if (r->drops != NULL) + counter_u64_free(r->drops); + if (r->starts != NULL) + counter_u64_free(r->starts); + if (r->stalls != NULL) + counter_u64_free(r->stalls); + if (r->restarts != NULL) + counter_u64_free(r->restarts); + if (r->abdications != NULL) + counter_u64_free(r->abdications); + + free(r, r->mt); +} + +/* + * Enqueue n items and maybe drain the ring for some time. + * + * Returns an errno. + */ +#ifdef NO_64BIT_ATOMICS +int +ifmp_ring_enqueue(struct ifmp_ring *r, void **items, int n, int budget) +{ + union ring_state os, ns; + uint16_t pidx_start, pidx_stop; + int i; + + MPASS(items != NULL); + MPASS(n > 0); + + mtx_lock(&r->lock); + /* + * Reserve room for the new items. Our reservation, if successful, is + * from 'pidx_start' to 'pidx_stop'. + */ + os.state = r->state; + if (n >= space_available(r, os)) { + counter_u64_add(r->drops, n); + MPASS(os.flags != IDLE); + if (os.flags == STALLED) + ifmp_ring_check_drainage(r, 0); + return (ENOBUFS); + } + ns.state = os.state; + ns.pidx_head = increment_idx(r, os.pidx_head, n); + r->state = ns.state; + pidx_start = os.pidx_head; + pidx_stop = ns.pidx_head; + + /* + * Wait for other producers who got in ahead of us to enqueue their + * items, one producer at a time. It is our turn when the ring's + * pidx_tail reaches the begining of our reservation (pidx_start). + */ + while (ns.pidx_tail != pidx_start) { + cpu_spinwait(); + ns.state = r->state; + } + + /* Now it is our turn to fill up the area we reserved earlier. */ + i = pidx_start; + do { + r->items[i] = *items++; + if (__predict_false(++i == r->size)) + i = 0; + } while (i != pidx_stop); + + /* + * Update the ring's pidx_tail. The release style atomic guarantees + * that the items are visible to any thread that sees the updated pidx. + */ + os.state = ns.state = r->state; + ns.pidx_tail = pidx_stop; + ns.flags = BUSY; + r->state = ns.state; + counter_u64_add(r->enqueues, n); + + /* + * Turn into a consumer if some other thread isn't active as a consumer + * already. + */ + if (os.flags != BUSY) + drain_ring_locked(r, ns, os.flags, budget); + + mtx_unlock(&r->lock); + return (0); +} + +#else +int +ifmp_ring_enqueue(struct ifmp_ring *r, void **items, int n, int budget) +{ + union ring_state os, ns; + uint16_t pidx_start, pidx_stop; + int i; + + MPASS(items != NULL); + MPASS(n > 0); + + /* + * Reserve room for the new items. Our reservation, if successful, is + * from 'pidx_start' to 'pidx_stop'. + */ + for (;;) { + os.state = r->state; + if (n >= space_available(r, os)) { + counter_u64_add(r->drops, n); + MPASS(os.flags != IDLE); + if (os.flags == STALLED) + ifmp_ring_check_drainage(r, 0); + return (ENOBUFS); + } + ns.state = os.state; + ns.pidx_head = increment_idx(r, os.pidx_head, n); + critical_enter(); + if (atomic_cmpset_64(&r->state, os.state, ns.state)) + break; + critical_exit(); + cpu_spinwait(); + } + pidx_start = os.pidx_head; + pidx_stop = ns.pidx_head; + + /* + * Wait for other producers who got in ahead of us to enqueue their + * items, one producer at a time. It is our turn when the ring's + * pidx_tail reaches the begining of our reservation (pidx_start). + */ + while (ns.pidx_tail != pidx_start) { + cpu_spinwait(); + ns.state = r->state; + } + + /* Now it is our turn to fill up the area we reserved earlier. */ + i = pidx_start; + do { + r->items[i] = *items++; + if (__predict_false(++i == r->size)) + i = 0; + } while (i != pidx_stop); + + /* + * Update the ring's pidx_tail. The release style atomic guarantees + * that the items are visible to any thread that sees the updated pidx. + */ + do { + os.state = ns.state = r->state; + ns.pidx_tail = pidx_stop; + ns.flags = BUSY; + } while (atomic_cmpset_rel_64(&r->state, os.state, ns.state) == 0); + critical_exit(); + counter_u64_add(r->enqueues, n); + + /* + * Turn into a consumer if some other thread isn't active as a consumer + * already. + */ + if (os.flags != BUSY) + drain_ring_lockless(r, ns, os.flags, budget); + + return (0); +} +#endif + +void +ifmp_ring_check_drainage(struct ifmp_ring *r, int budget) +{ + union ring_state os, ns; + + os.state = r->state; + if (os.flags != STALLED || os.pidx_head != os.pidx_tail || r->can_drain(r) == 0) + return; + + MPASS(os.cidx != os.pidx_tail); /* implied by STALLED */ + ns.state = os.state; + ns.flags = BUSY; + + +#ifdef NO_64BIT_ATOMICS + mtx_lock(&r->lock); + if (r->state != os.state) { + mtx_unlock(&r->lock); + return; + } + r->state = ns.state; + drain_ring_locked(r, ns, os.flags, budget); + mtx_unlock(&r->lock); +#else + /* + * The acquire style atomic guarantees visibility of items associated + * with the pidx that we read here. + */ + if (!atomic_cmpset_acq_64(&r->state, os.state, ns.state)) + return; + + + drain_ring_lockless(r, ns, os.flags, budget); +#endif +} + +void +ifmp_ring_reset_stats(struct ifmp_ring *r) +{ + + counter_u64_zero(r->enqueues); + counter_u64_zero(r->drops); + counter_u64_zero(r->starts); + counter_u64_zero(r->stalls); + counter_u64_zero(r->restarts); + counter_u64_zero(r->abdications); +} + +int +ifmp_ring_is_idle(struct ifmp_ring *r) +{ + union ring_state s; + + s.state = r->state; + if (s.pidx_head == s.pidx_tail && s.pidx_tail == s.cidx && + s.flags == IDLE) + return (1); + + return (0); +} + +int +ifmp_ring_is_stalled(struct ifmp_ring *r) +{ + union ring_state s; + + s.state = r->state; + if (s.pidx_head == s.pidx_tail && s.flags == STALLED) + return (1); + + return (0); +} Index: sys/sys/mbuf.h =================================================================== --- sys/sys/mbuf.h +++ sys/sys/mbuf.h @@ -279,6 +279,8 @@ #define M_PROTO11 0x00400000 /* protocol-specific */ #define M_PROTO12 0x00800000 /* protocol-specific */ +#define MB_DTOR_SKIP 0x1 /* don't pollute the cache by touching a freed mbuf */ + /* * Flags to purge when crossing layers. */ @@ -401,6 +403,7 @@ */ #define EXT_FLAG_EMBREF 0x000001 /* embedded ext_count */ #define EXT_FLAG_EXTREF 0x000002 /* external ext_cnt, notyet */ + #define EXT_FLAG_NOFREE 0x000010 /* don't free mbuf to pool, notyet */ #define EXT_FLAG_VENDOR1 0x010000 /* for vendor-internal use */