From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9199C433F5 for ; Fri, 4 Mar 2022 00:08:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235007AbiCDAJg (ORCPT ); Thu, 3 Mar 2022 19:09:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235107AbiCDAJf (ORCPT ); Thu, 3 Mar 2022 19:09:35 -0500 Received: from mail-ot1-x32e.google.com (mail-ot1-x32e.google.com [IPv6:2607:f8b0:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA8EA49277 for ; Thu, 3 Mar 2022 16:08:47 -0800 (PST) Received: by mail-ot1-x32e.google.com with SMTP id 40-20020a9d032b000000b005b02923e2e6so6065719otv.1 for ; Thu, 03 Mar 2022 16:08:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WTCCDs60aK4EDN4BuvxmI18oOfluSAUk7qcm893+q7A=; b=oCbJeYH8C3+aCcvVJRbSihcs5qz+inAjrf+j+QIU2HTT4gXZsGQkDIQAJe/9xc+uUt +yjfZ7hlejl8pGJBxIlD9rhIA0wSHCLdZbGua2F+YcVwgXSgFn7d5QzO5RO0wkNWdaLM 2Pz6d6ehwerp5CgJ+hMuXsbIJuSZxCip3Z02FKHCNrXscUcA6ZD4KCOgCZmQsP+oUq4p ARTORNbzFOJ9B/jYn5LNflrN/15vtUemoOACutjVEhOg86Q8WF+UQ+XxE7GLn2FQ09Wi hEuSaQAcUpMon3KRTdswACX3Qh4xC4FV8dTlPAo/ky/OWppp6tU9SwdHz586DOpFXZlw e+5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WTCCDs60aK4EDN4BuvxmI18oOfluSAUk7qcm893+q7A=; b=emVnR2xS1kDam2ktm0UvGS/7f16ed/OFhLohFTHOcJwaN+5Dfzyvu4u7Xg1R3XrhdP lDvjPIP9XS/HERxTzWuVdMmh0nla8DUB/ken5buuZkB8qnFevmUyxQcFR0LVKdI5qctO m6cYNNngM8UkBNqe+REV++JsW0NUgxV/tpHyiHhucw5iKg88pfykmX+bB4ycvNHRgdQ0 YdEPGquTNta1T2xsRiO50mSmLINknStbVxPN2HTvdODdxw+bO4UjGd7YsLgDnJsZcLcq JxKrUZ/Yq62DE1nc4MqhbfbKALWe1ZQ0axLXF7NWsgiTYcQZBx9nkofbX0lZ8Q9VP3Fd l+Ow== X-Gm-Message-State: AOAM533JVBG7sqZpD9gAlOSKrO4bZJR8ATh+BeVvHpnFco2hKcvqYi1b CteLoPuABWLnyaFgm6JQuIlwuHhJgL8= X-Google-Smtp-Source: ABdhPJyiENDX6vSsKrF+sS2RwwfmK+HfQIWJTVKYd4TbogDpi6O/oIAkbIWBeOOolew2PW7CCV2fnA== X-Received: by 2002:a9d:da6:0:b0:59f:a2fa:a158 with SMTP id 35-20020a9d0da6000000b0059fa2faa158mr20361761ots.20.1646352527224; Thu, 03 Mar 2022 16:08:47 -0800 (PST) Received: from ubuntu-21.tx.rr.com (2603-8081-140c-1a00-4a4e-f957-5a09-0218.res6.spectrum.com. [2603:8081:140c:1a00:4a4e:f957:5a09:218]) by smtp.googlemail.com with ESMTPSA id n23-20020a9d7417000000b005afc3371166sm1646469otk.81.2022.03.03.16.08.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Mar 2022 16:08:47 -0800 (PST) From: Bob Pearson To: jgg@nvidia.com, zyjzyj2000@gmail.com, linux-rdma@vger.kernel.org Cc: Bob Pearson Subject: [PATCH for-next v11 08/13] RDMA/rxe: Replace red-black trees by xarrays Date: Thu, 3 Mar 2022 18:08:04 -0600 Message-Id: <20220304000808.225811-9-rpearsonhpe@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220304000808.225811-1-rpearsonhpe@gmail.com> References: <20220304000808.225811-1-rpearsonhpe@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Currently the rxe driver uses red-black trees to add indices to the rxe object pools. Linux xarrays provide a better way to implement the same functionality for indices. This patch replaces red-black trees by xarrays for pool objects. Since xarrays already have a spinlock use that in place of the pool rwlock. Make sure that all changes in the xarray(index) and kref(ref counnt) occur atomically. Signed-off-by: Bob Pearson --- drivers/infiniband/sw/rxe/rxe.c | 80 ++------- drivers/infiniband/sw/rxe/rxe_mr.c | 1 - drivers/infiniband/sw/rxe/rxe_mw.c | 8 - drivers/infiniband/sw/rxe/rxe_pool.c | 236 +++++++++----------------- drivers/infiniband/sw/rxe/rxe_pool.h | 43 ++--- drivers/infiniband/sw/rxe/rxe_verbs.c | 12 -- 6 files changed, 103 insertions(+), 277 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c index dc1f9dd70966..2dae7538a2ea 100644 --- a/drivers/infiniband/sw/rxe/rxe.c +++ b/drivers/infiniband/sw/rxe/rxe.c @@ -114,75 +114,26 @@ static void rxe_init_ports(struct rxe_dev *rxe) } /* init pools of managed objects */ -static int rxe_init_pools(struct rxe_dev *rxe) +static void rxe_init_pools(struct rxe_dev *rxe) { - int err; - - err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); - if (err) - goto err1; - - err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); - if (err) - goto err2; - - err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); - if (err) - goto err3; - - err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); - if (err) - goto err4; - - err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); - if (err) - goto err5; - - err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); - if (err) - goto err6; - - err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); - if (err) - goto err7; - - err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); - if (err) - goto err8; - - return 0; - -err8: - rxe_pool_cleanup(&rxe->mr_pool); -err7: - rxe_pool_cleanup(&rxe->cq_pool); -err6: - rxe_pool_cleanup(&rxe->qp_pool); -err5: - rxe_pool_cleanup(&rxe->srq_pool); -err4: - rxe_pool_cleanup(&rxe->ah_pool); -err3: - rxe_pool_cleanup(&rxe->pd_pool); -err2: - rxe_pool_cleanup(&rxe->uc_pool); -err1: - return err; + rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); + rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); + rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); + rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); + rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); + rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); + rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); + rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); } /* initialize rxe device state */ -static int rxe_init(struct rxe_dev *rxe) +static void rxe_init(struct rxe_dev *rxe) { - int err; - /* init default device parameters */ rxe_init_device_param(rxe); rxe_init_ports(rxe); - - err = rxe_init_pools(rxe); - if (err) - return err; + rxe_init_pools(rxe); /* init pending mmap list */ spin_lock_init(&rxe->mmap_offset_lock); @@ -194,8 +145,6 @@ static int rxe_init(struct rxe_dev *rxe) rxe->mcg_tree = RB_ROOT; mutex_init(&rxe->usdev_lock); - - return 0; } void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) @@ -217,12 +166,7 @@ void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) */ int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) { - int err; - - err = rxe_init(rxe); - if (err) - return err; - + rxe_init(rxe); rxe_set_mtu(rxe, mtu); return rxe_register_device(rxe, ibdev_name); diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c index 453ef3c9d535..35628b8a00b4 100644 --- a/drivers/infiniband/sw/rxe/rxe_mr.c +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -691,7 +691,6 @@ int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) mr->state = RXE_MR_STATE_INVALID; rxe_drop_ref(mr_pd(mr)); - rxe_drop_index(mr); rxe_drop_ref(mr); return 0; diff --git a/drivers/infiniband/sw/rxe/rxe_mw.c b/drivers/infiniband/sw/rxe/rxe_mw.c index 32dd8c0b8b9e..7df36c40eec2 100644 --- a/drivers/infiniband/sw/rxe/rxe_mw.c +++ b/drivers/infiniband/sw/rxe/rxe_mw.c @@ -20,7 +20,6 @@ int rxe_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata) return ret; } - rxe_add_index(mw); mw->rkey = ibmw->rkey = (mw->elem.index << 8) | rxe_get_next_key(-1); mw->state = (mw->ibmw.type == IB_MW_TYPE_2) ? RXE_MW_STATE_FREE : RXE_MW_STATE_VALID; @@ -329,10 +328,3 @@ struct rxe_mw *rxe_lookup_mw(struct rxe_qp *qp, int access, u32 rkey) return mw; } - -void rxe_mw_cleanup(struct rxe_pool_elem *elem) -{ - struct rxe_mw *mw = container_of(elem, typeof(*mw), elem); - - rxe_drop_index(mw); -} diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c index c50baeb10bd2..b0dfeb08a470 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.c +++ b/drivers/infiniband/sw/rxe/rxe_pool.c @@ -22,19 +22,22 @@ static const struct rxe_type_info { .name = "uc", .size = sizeof(struct rxe_ucontext), .elem_offset = offsetof(struct rxe_ucontext, elem), + .min_index = 1, + .max_index = UINT_MAX, .max_elem = UINT_MAX, }, [RXE_TYPE_PD] = { .name = "pd", .size = sizeof(struct rxe_pd), .elem_offset = offsetof(struct rxe_pd, elem), + .min_index = 1, + .max_index = UINT_MAX, .max_elem = UINT_MAX, }, [RXE_TYPE_AH] = { .name = "ah", .size = sizeof(struct rxe_ah), .elem_offset = offsetof(struct rxe_ah, elem), - .flags = RXE_POOL_INDEX, .min_index = RXE_MIN_AH_INDEX, .max_index = RXE_MAX_AH_INDEX, .max_elem = RXE_MAX_AH_INDEX - RXE_MIN_AH_INDEX + 1, @@ -43,7 +46,6 @@ static const struct rxe_type_info { .name = "srq", .size = sizeof(struct rxe_srq), .elem_offset = offsetof(struct rxe_srq, elem), - .flags = RXE_POOL_INDEX, .min_index = RXE_MIN_SRQ_INDEX, .max_index = RXE_MAX_SRQ_INDEX, .max_elem = RXE_MAX_SRQ_INDEX - RXE_MIN_SRQ_INDEX + 1, @@ -53,7 +55,6 @@ static const struct rxe_type_info { .size = sizeof(struct rxe_qp), .elem_offset = offsetof(struct rxe_qp, elem), .cleanup = rxe_qp_cleanup, - .flags = RXE_POOL_INDEX, .min_index = RXE_MIN_QP_INDEX, .max_index = RXE_MAX_QP_INDEX, .max_elem = RXE_MAX_QP_INDEX - RXE_MIN_QP_INDEX + 1, @@ -63,6 +64,8 @@ static const struct rxe_type_info { .size = sizeof(struct rxe_cq), .elem_offset = offsetof(struct rxe_cq, elem), .cleanup = rxe_cq_cleanup, + .min_index = 1, + .max_index = UINT_MAX, .max_elem = UINT_MAX, }, [RXE_TYPE_MR] = { @@ -70,7 +73,7 @@ static const struct rxe_type_info { .size = sizeof(struct rxe_mr), .elem_offset = offsetof(struct rxe_mr, elem), .cleanup = rxe_mr_cleanup, - .flags = RXE_POOL_INDEX | RXE_POOL_ALLOC, + .flags = RXE_POOL_ALLOC, .min_index = RXE_MIN_MR_INDEX, .max_index = RXE_MAX_MR_INDEX, .max_elem = RXE_MAX_MR_INDEX - RXE_MIN_MR_INDEX + 1, @@ -79,44 +82,16 @@ static const struct rxe_type_info { .name = "mw", .size = sizeof(struct rxe_mw), .elem_offset = offsetof(struct rxe_mw, elem), - .cleanup = rxe_mw_cleanup, - .flags = RXE_POOL_INDEX, .min_index = RXE_MIN_MW_INDEX, .max_index = RXE_MAX_MW_INDEX, .max_elem = RXE_MAX_MW_INDEX - RXE_MIN_MW_INDEX + 1, }, }; -static int rxe_pool_init_index(struct rxe_pool *pool, u32 max, u32 min) -{ - int err = 0; - - if ((max - min + 1) < pool->max_elem) { - pr_warn("not enough indices for max_elem\n"); - err = -EINVAL; - goto out; - } - - pool->index.max_index = max; - pool->index.min_index = min; - - pool->index.table = bitmap_zalloc(max - min + 1, GFP_KERNEL); - if (!pool->index.table) { - err = -ENOMEM; - goto out; - } - -out: - return err; -} - -int rxe_pool_init( - struct rxe_dev *rxe, - struct rxe_pool *pool, - enum rxe_elem_type type) +void rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool, + enum rxe_elem_type type) { const struct rxe_type_info *info = &rxe_type_info[type]; - int err = 0; memset(pool, 0, sizeof(*pool)); @@ -131,111 +106,52 @@ int rxe_pool_init( atomic_set(&pool->num_elem, 0); - rwlock_init(&pool->pool_lock); - - if (pool->flags & RXE_POOL_INDEX) { - pool->index.tree = RB_ROOT; - err = rxe_pool_init_index(pool, info->max_index, - info->min_index); - if (err) - goto out; - } - -out: - return err; + xa_init_flags(&pool->xa, XA_FLAGS_ALLOC); + pool->limit.min = info->min_index; + pool->limit.max = info->max_index; } void rxe_pool_cleanup(struct rxe_pool *pool) { - if (atomic_read(&pool->num_elem) > 0) - pr_warn("%s pool destroyed with unfree'd elem\n", - pool->name); - - if (pool->flags & RXE_POOL_INDEX) - bitmap_free(pool->index.table); -} - -static u32 alloc_index(struct rxe_pool *pool) -{ - u32 index; - u32 range = pool->index.max_index - pool->index.min_index + 1; - - index = find_next_zero_bit(pool->index.table, range, pool->index.last); - if (index >= range) - index = find_first_zero_bit(pool->index.table, range); - - WARN_ON_ONCE(index >= range); - set_bit(index, pool->index.table); - pool->index.last = index; - return index + pool->index.min_index; -} - -static int rxe_insert_index(struct rxe_pool *pool, struct rxe_pool_elem *new) -{ - struct rb_node **link = &pool->index.tree.rb_node; - struct rb_node *parent = NULL; struct rxe_pool_elem *elem; - - while (*link) { - parent = *link; - elem = rb_entry(parent, struct rxe_pool_elem, index_node); - - if (elem->index == new->index) { - pr_warn("element already exists!\n"); - return -EINVAL; + struct xarray *xa = &pool->xa; + unsigned long index = 0; + unsigned long max = ULONG_MAX; + unsigned int elem_count = 0; + unsigned int obj_count = 0; + + do { + elem = xa_find(xa, &index, max, XA_PRESENT); + if (elem) { + elem_count++; + xa_erase(xa, index); + if (pool->flags & RXE_POOL_ALLOC) { + kfree(elem->obj); + obj_count++; + } } + } while (elem); - if (elem->index > new->index) - link = &(*link)->rb_left; - else - link = &(*link)->rb_right; - } - - rb_link_node(&new->index_node, parent, link); - rb_insert_color(&new->index_node, &pool->index.tree); - - return 0; -} - -int __rxe_add_index(struct rxe_pool_elem *elem) -{ - struct rxe_pool *pool = elem->pool; - unsigned long flags; - int err; - - write_lock_irqsave(&pool->pool_lock, flags); - elem->index = alloc_index(pool); - err = rxe_insert_index(pool, elem); - write_unlock_irqrestore(&pool->pool_lock, flags); - - return err; -} - -void __rxe_drop_index(struct rxe_pool_elem *elem) -{ - struct rxe_pool *pool = elem->pool; - unsigned long flags; - - write_lock_irqsave(&pool->pool_lock, flags); - clear_bit(elem->index - pool->index.min_index, pool->index.table); - rb_erase(&elem->index_node, &pool->index.tree); - write_unlock_irqrestore(&pool->pool_lock, flags); + if (WARN_ON(elem_count || obj_count)) + pr_debug("Freed %d indices and %d objects from pool %s\n", + elem_count, obj_count, pool->name); } void *rxe_alloc(struct rxe_pool *pool) { struct rxe_pool_elem *elem; void *obj; + int err; if (WARN_ON(!(pool->flags & RXE_POOL_ALLOC))) return NULL; if (atomic_inc_return(&pool->num_elem) > pool->max_elem) - goto out_cnt; + goto err_cnt; obj = kzalloc(pool->elem_size, GFP_KERNEL); if (!obj) - goto out_cnt; + goto err_cnt; elem = (struct rxe_pool_elem *)((u8 *)obj + pool->elem_offset); @@ -243,78 +159,86 @@ void *rxe_alloc(struct rxe_pool *pool) elem->obj = obj; kref_init(&elem->ref_cnt); + err = xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, + &pool->next, GFP_KERNEL); + if (err) + goto err_free; + return obj; -out_cnt: +err_free: + kfree(obj); +err_cnt: atomic_dec(&pool->num_elem); return NULL; } int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem) { + int err; + if (WARN_ON(pool->flags & RXE_POOL_ALLOC)) return -EINVAL; if (atomic_inc_return(&pool->num_elem) > pool->max_elem) - goto out_cnt; + goto err_cnt; elem->pool = pool; elem->obj = (u8 *)elem - pool->elem_offset; kref_init(&elem->ref_cnt); + err = xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit, + &pool->next, GFP_KERNEL); + if (err) + goto err_cnt; + return 0; -out_cnt: +err_cnt: atomic_dec(&pool->num_elem); return -EINVAL; } -void rxe_elem_release(struct kref *kref) +void *rxe_pool_get_index(struct rxe_pool *pool, u32 index) { - struct rxe_pool_elem *elem = - container_of(kref, struct rxe_pool_elem, ref_cnt); - struct rxe_pool *pool = elem->pool; + struct rxe_pool_elem *elem; + struct xarray *xa = &pool->xa; + unsigned long flags; void *obj; - if (pool->cleanup) - pool->cleanup(elem); - - if (pool->flags & RXE_POOL_ALLOC) { + xa_lock_irqsave(xa, flags); + elem = xa_load(xa, index); + if (elem && kref_get_unless_zero(&elem->ref_cnt)) obj = elem->obj; - kfree(obj); - } + else + obj = NULL; + xa_unlock_irqrestore(xa, flags); - atomic_dec(&pool->num_elem); + return obj; } -void *rxe_pool_get_index(struct rxe_pool *pool, u32 index) +static void rxe_elem_release(struct kref *kref) { - struct rxe_pool_elem *elem; - struct rb_node *node; - unsigned long flags; - void *obj; + struct rxe_pool_elem *elem = container_of(kref, typeof(*elem), ref_cnt); + struct rxe_pool *pool = elem->pool; - read_lock_irqsave(&pool->pool_lock, flags); - node = pool->index.tree.rb_node; + xa_erase(&pool->xa, elem->index); - while (node) { - elem = rb_entry(node, struct rxe_pool_elem, index_node); + if (pool->cleanup) + pool->cleanup(elem); - if (elem->index > index) - node = node->rb_left; - else if (elem->index < index) - node = node->rb_right; - else - break; - } + if (pool->flags & RXE_POOL_ALLOC) + kfree(elem->obj); - if (node) { - kref_get(&elem->ref_cnt); - obj = elem->obj; - } else { - obj = NULL; - } - read_unlock_irqrestore(&pool->pool_lock, flags); + atomic_dec(&pool->num_elem); +} - return obj; +int __rxe_get(struct rxe_pool_elem *elem) +{ + return kref_get_unless_zero(&elem->ref_cnt); +} + +int __rxe_put(struct rxe_pool_elem *elem) +{ + return kref_put(&elem->ref_cnt, rxe_elem_release); } diff --git a/drivers/infiniband/sw/rxe/rxe_pool.h b/drivers/infiniband/sw/rxe/rxe_pool.h index 5f34d232d7f4..d1e05d384b2c 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.h +++ b/drivers/infiniband/sw/rxe/rxe_pool.h @@ -8,8 +8,7 @@ #define RXE_POOL_H enum rxe_pool_flags { - RXE_POOL_INDEX = BIT(1), - RXE_POOL_ALLOC = BIT(2), + RXE_POOL_ALLOC = BIT(1), }; enum rxe_elem_type { @@ -29,16 +28,12 @@ struct rxe_pool_elem { void *obj; struct kref ref_cnt; struct list_head list; - - /* only used if indexed */ - struct rb_node index_node; u32 index; }; struct rxe_pool { struct rxe_dev *rxe; const char *name; - rwlock_t pool_lock; /* protects pool add/del/search */ void (*cleanup)(struct rxe_pool_elem *elem); enum rxe_pool_flags flags; enum rxe_elem_type type; @@ -48,21 +43,16 @@ struct rxe_pool { size_t elem_size; size_t elem_offset; - /* only used if indexed */ - struct { - struct rb_root tree; - unsigned long *table; - u32 last; - u32 max_index; - u32 min_index; - } index; + struct xarray xa; + struct xa_limit limit; + u32 next; }; /* initialize a pool of objects with given limit on * number of elements. gets parameters from rxe_type_info * pool elements will be allocated out of a slab cache */ -int rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool, +void rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool, enum rxe_elem_type type); /* free resources from object pool */ @@ -76,29 +66,18 @@ int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem); #define rxe_add_to_pool(pool, obj) __rxe_add_to_pool(pool, &(obj)->elem) -/* assign an index to an indexed object and insert object into - * pool's rb tree - */ -int __rxe_add_index(struct rxe_pool_elem *elem); - -#define rxe_add_index(obj) __rxe_add_index(&(obj)->elem) - -/* drop an index and remove object from rb tree */ -void __rxe_drop_index(struct rxe_pool_elem *elem); - -#define rxe_drop_index(obj) __rxe_drop_index(&(obj)->elem) - /* lookup an indexed object from index. takes a reference on object */ void *rxe_pool_get_index(struct rxe_pool *pool, u32 index); -/* cleanup an object when all references are dropped */ -void rxe_elem_release(struct kref *kref); - /* take a reference on an object */ -#define rxe_add_ref(obj) kref_get(&(obj)->elem.ref_cnt) +int __rxe_get(struct rxe_pool_elem *elem); + +#define rxe_add_ref(obj) __rxe_get(&(obj)->elem) /* drop a reference on an object */ -#define rxe_drop_ref(obj) kref_put(&(obj)->elem.ref_cnt, rxe_elem_release) +int __rxe_put(struct rxe_pool_elem *elem); + +#define rxe_drop_ref(obj) __rxe_put(&(obj)->elem) #define rxe_read_ref(obj) kref_read(&(obj)->elem.ref_cnt) diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index 80df9a8f71a1..f0c5715ac500 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -181,7 +181,6 @@ static int rxe_create_ah(struct ib_ah *ibah, return err; /* create index > 0 */ - rxe_add_index(ah); ah->ah_num = ah->elem.index; if (uresp) { @@ -189,7 +188,6 @@ static int rxe_create_ah(struct ib_ah *ibah, err = copy_to_user(&uresp->ah_num, &ah->ah_num, sizeof(uresp->ah_num)); if (err) { - rxe_drop_index(ah); rxe_drop_ref(ah); return -EFAULT; } @@ -230,7 +228,6 @@ static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags) { struct rxe_ah *ah = to_rah(ibah); - rxe_drop_index(ah); rxe_drop_ref(ah); return 0; } @@ -438,7 +435,6 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, if (err) return err; - rxe_add_index(qp); err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata); if (err) goto qp_init; @@ -446,7 +442,6 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, return 0; qp_init: - rxe_drop_index(qp); rxe_drop_ref(qp); return err; } @@ -501,7 +496,6 @@ static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) return ret; rxe_qp_destroy(qp); - rxe_drop_index(qp); rxe_drop_ref(qp); return 0; } @@ -908,7 +902,6 @@ static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) if (!mr) return ERR_PTR(-ENOMEM); - rxe_add_index(mr); rxe_add_ref(pd); rxe_mr_init_dma(pd, access, mr); @@ -932,7 +925,6 @@ static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, goto err2; } - rxe_add_index(mr); rxe_add_ref(pd); @@ -944,7 +936,6 @@ static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, err3: rxe_drop_ref(pd); - rxe_drop_index(mr); rxe_drop_ref(mr); err2: return ERR_PTR(err); @@ -967,8 +958,6 @@ static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, goto err1; } - rxe_add_index(mr); - rxe_add_ref(pd); err = rxe_mr_init_fast(pd, max_num_sg, mr); @@ -979,7 +968,6 @@ static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, err2: rxe_drop_ref(pd); - rxe_drop_index(mr); rxe_drop_ref(mr); err1: return ERR_PTR(err); -- 2.32.0