From patchwork Sun Jan 1 23:40:48 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bill Fischofer X-Patchwork-Id: 89452 Delivered-To: patch@linaro.org Received: by 10.140.20.101 with SMTP id 92csp7373271qgi; Sun, 1 Jan 2017 15:44:14 -0800 (PST) X-Received: by 10.55.170.140 with SMTP id t134mr53932957qke.53.1483314254474; Sun, 01 Jan 2017 15:44:14 -0800 (PST) Return-Path: Received: from lists.linaro.org (lists.linaro.org. [54.225.227.206]) by mx.google.com with ESMTP id p64si30844801qkc.307.2017.01.01.15.44.14; Sun, 01 Jan 2017 15:44:14 -0800 (PST) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) client-ip=54.225.227.206; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 2290460A44; Sun, 1 Jan 2017 23:44:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id 4C3C160937; Sun, 1 Jan 2017 23:42:46 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id D020660A2F; Sun, 1 Jan 2017 23:41:02 +0000 (UTC) Received: from mail-oi0-f50.google.com (mail-oi0-f50.google.com [209.85.218.50]) by lists.linaro.org (Postfix) with ESMTPS id 9D22660937 for ; Sun, 1 Jan 2017 23:40:58 +0000 (UTC) Received: by mail-oi0-f50.google.com with SMTP id 128so274238015oig.0 for ; Sun, 01 Jan 2017 15:40:58 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=X4ahUbO7xh+J37z4xk5AQPWlGEggJQ9rd3q4xFiikyA=; b=GrHker+JtWDHHyXuIFTrhnVrZXKCAIqQUKxp5AsSkA34NRyxbO+HB7+mhBUTR+m5ll +B4Z6AeoBpV/1b/mtThc9h/9povdvI/svKUMPvr3hRQmwOasCu5qzJQgX/tIDM0JC3Tq It7zevZovJwIKXpMXeAKk75nTyXH0uMimasRrYlcTBCnUWbcZuAdcJtaQvs2S9ZhezaQ t69FsaJRGGKTlfYc32HjzVyDHKeku6/Ek6Fa7TyPpBAI3F98A5wWtT9k562Of7QY+Q0V Is8ZJWFqo36/OBVqtGYm53h5hvE+roTtinD9J0/qMiiga6Gh/lDM1qGWfRNtQ8Usxm9/ /W8A== X-Gm-Message-State: AIkVDXL4Zt8V/zxRMKLZV81zH9xiCc3TLOFUEt5KgiEbhQvi/8zs3h4j5r4wh9dhjY3tMb2DH2w= X-Received: by 10.157.20.142 with SMTP id d14mr25193311ote.74.1483314057659; Sun, 01 Jan 2017 15:40:57 -0800 (PST) Received: from Ubuntu15.localdomain (cpe-70-121-83-241.austin.res.rr.com. [70.121.83.241]) by smtp.gmail.com with ESMTPSA id f68sm31209216oih.20.2017.01.01.15.40.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 01 Jan 2017 15:40:57 -0800 (PST) From: Bill Fischofer To: lng-odp@lists.linaro.org Date: Sun, 1 Jan 2017 17:40:48 -0600 Message-Id: <1483314051-3428-2-git-send-email-bill.fischofer@linaro.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1483314051-3428-1-git-send-email-bill.fischofer@linaro.org> References: <1483314051-3428-1-git-send-email-bill.fischofer@linaro.org> Subject: [lng-odp] [API-NEXT PATCHv4 2/5] linux-generic: packet: implement reference apis X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" Implement the APIs: - odp_packet_ref_static() - odp_packet_ref() - odp_packet_ref_pkt() - odp_packet_is_ref() - odp_packet_has_ref() - odp_packet_unshared_len() This also involves functional upgrades to the existing packet manipulation APIs to work with packet references as input. Signed-off-by: Bill Fischofer --- .../linux-generic/include/odp_packet_internal.h | 68 ++- platform/linux-generic/odp_packet.c | 549 +++++++++++++++++---- 2 files changed, 510 insertions(+), 107 deletions(-) -- 2.7.4 diff --git a/platform/linux-generic/include/odp_packet_internal.h b/platform/linux-generic/include/odp_packet_internal.h index d09231e..74568cf 100644 --- a/platform/linux-generic/include/odp_packet_internal.h +++ b/platform/linux-generic/include/odp_packet_internal.h @@ -167,7 +167,7 @@ typedef struct { * packet_init(). Because of this any new fields added must be reviewed for * initialization requirements. */ -typedef struct { +typedef struct odp_packet_hdr_t { /* common buffer header */ odp_buffer_hdr_t buf_hdr; @@ -178,6 +178,13 @@ typedef struct { uint32_t headroom; uint32_t tailroom; + /* Fields used to support packet references */ + odp_atomic_u32_t ref_count; /* Number of refs to this pkt/seg */ + uint32_t unshared_len; /* Offset that sharing starts at */ + uint32_t ref_offset; /* Offset into base pkt for this ref */ + uint32_t ref_len; /* frame_len at time this ref created */ + struct odp_packet_hdr_t *ref_hdr; /* Ptr to the base pkt for this ref */ + odp_pktio_t input; /* Members below are not initialized by packet_init() */ @@ -200,6 +207,50 @@ static inline odp_packet_hdr_t *odp_packet_hdr(odp_packet_t pkt) return (odp_packet_hdr_t *)buf_hdl_to_hdr((odp_buffer_t)pkt); } +static inline odp_packet_hdr_t *odp_packet_last_hdr(odp_packet_t pkt, + uint32_t *offset) +{ + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + odp_packet_hdr_t *prev_hdr = pkt_hdr; + uint32_t ref_offset = 0; + + while (pkt_hdr->ref_hdr) { + ref_offset = pkt_hdr->ref_offset; + prev_hdr = pkt_hdr; + pkt_hdr = pkt_hdr->ref_hdr; + } + + if (offset) { + if (prev_hdr != pkt_hdr) + ref_offset += pkt_hdr->frame_len - prev_hdr->ref_len; + *offset = ref_offset; + } + + return pkt_hdr; +} + +static inline odp_packet_hdr_t *odp_packet_prev_hdr(odp_packet_hdr_t *pkt_hdr, + odp_packet_hdr_t *cur_hdr, + uint32_t *offset) +{ + uint32_t ref_offset = 0; + odp_packet_hdr_t *prev_hdr = pkt_hdr; + + while (pkt_hdr->ref_hdr != cur_hdr) { + ref_offset = pkt_hdr->ref_offset; + prev_hdr = pkt_hdr; + pkt_hdr = pkt_hdr->ref_hdr; + } + + if (offset) { + if (prev_hdr != pkt_hdr) + ref_offset += pkt_hdr->frame_len - prev_hdr->ref_len; + *offset = ref_offset; + } + + return pkt_hdr; +} + static inline void copy_packet_parser_metadata(odp_packet_hdr_t *src_hdr, odp_packet_hdr_t *dst_hdr) { @@ -222,12 +273,25 @@ static inline void pull_tail(odp_packet_hdr_t *pkt_hdr, uint32_t len) pkt_hdr->tailroom += len; pkt_hdr->frame_len -= len; + pkt_hdr->unshared_len -= len; pkt_hdr->buf_hdr.seg[last].len -= len; } static inline uint32_t packet_len(odp_packet_hdr_t *pkt_hdr) { - return pkt_hdr->frame_len; + uint32_t pkt_len = 0; + uint32_t offset = 0; + + do { + pkt_len += pkt_hdr->frame_len - offset; + offset = pkt_hdr->ref_offset; + if (pkt_hdr->ref_hdr) + offset += (pkt_hdr->ref_hdr->frame_len - + pkt_hdr->ref_len); + pkt_hdr = pkt_hdr->ref_hdr; + } while (pkt_hdr); + + return pkt_len; } static inline void packet_set_len(odp_packet_hdr_t *pkt_hdr, uint32_t len) diff --git a/platform/linux-generic/odp_packet.c b/platform/linux-generic/odp_packet.c index 58b6f32..66ada74 100644 --- a/platform/linux-generic/odp_packet.c +++ b/platform/linux-generic/odp_packet.c @@ -30,13 +30,34 @@ static inline odp_buffer_t buffer_handle(odp_packet_hdr_t *pkt_hdr) return pkt_hdr->buf_hdr.handle.handle; } +static inline uint32_t packet_ref_count(odp_packet_hdr_t *pkt_hdr) +{ + return odp_atomic_load_u32(&pkt_hdr->ref_count); +} + +static inline void packet_ref_count_set(odp_packet_hdr_t *pkt_hdr, uint32_t n) +{ + odp_atomic_init_u32(&pkt_hdr->ref_count, n); +} + +static inline uint32_t packet_ref_inc(odp_packet_hdr_t *pkt_hdr) +{ + return odp_atomic_fetch_inc_u32(&pkt_hdr->ref_count); +} + +static inline uint32_t packet_ref_dec(odp_packet_hdr_t *pkt_hdr) +{ + return odp_atomic_fetch_dec_u32(&pkt_hdr->ref_count); +} + static inline uint32_t packet_seg_len(odp_packet_hdr_t *pkt_hdr, uint32_t seg_idx) { return pkt_hdr->buf_hdr.seg[seg_idx].len; } -static inline void *packet_seg_data(odp_packet_hdr_t *pkt_hdr, uint32_t seg_idx) +static inline uint8_t *packet_seg_data(odp_packet_hdr_t *pkt_hdr, + uint32_t seg_idx) { return pkt_hdr->buf_hdr.seg[seg_idx].data; } @@ -49,6 +70,11 @@ static inline int packet_last_seg(odp_packet_hdr_t *pkt_hdr) return pkt_hdr->buf_hdr.segcount - 1; } +static inline void *packet_data(odp_packet_hdr_t *pkt_hdr) +{ + return pkt_hdr->buf_hdr.seg[0].data; +} + static inline uint32_t packet_first_seg_len(odp_packet_hdr_t *pkt_hdr) { return packet_seg_len(pkt_hdr, 0); @@ -61,11 +87,6 @@ static inline uint32_t packet_last_seg_len(odp_packet_hdr_t *pkt_hdr) return packet_seg_len(pkt_hdr, last); } -static inline void *packet_data(odp_packet_hdr_t *pkt_hdr) -{ - return pkt_hdr->buf_hdr.seg[0].data; -} - static inline void *packet_tail(odp_packet_hdr_t *pkt_hdr) { int last = packet_last_seg(pkt_hdr); @@ -96,6 +117,7 @@ static inline void push_head(odp_packet_hdr_t *pkt_hdr, uint32_t len) { pkt_hdr->headroom -= len; pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; pkt_hdr->buf_hdr.seg[0].data -= len; pkt_hdr->buf_hdr.seg[0].len += len; } @@ -104,6 +126,7 @@ static inline void pull_head(odp_packet_hdr_t *pkt_hdr, uint32_t len) { pkt_hdr->headroom += len; pkt_hdr->frame_len -= len; + pkt_hdr->unshared_len -= len; pkt_hdr->buf_hdr.seg[0].data += len; pkt_hdr->buf_hdr.seg[0].len -= len; } @@ -114,6 +137,7 @@ static inline void push_tail(odp_packet_hdr_t *pkt_hdr, uint32_t len) pkt_hdr->tailroom -= len; pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; pkt_hdr->buf_hdr.seg[last].len += len; } @@ -141,6 +165,10 @@ static inline void packet_seg_copy_md(odp_packet_hdr_t *dst, dst->buf_hdr.uarea_addr = src->buf_hdr.uarea_addr; dst->buf_hdr.uarea_size = src->buf_hdr.uarea_size; + /* reference related metadata */ + dst->ref_len = src->ref_len; + dst->unshared_len = src->unshared_len; + /* segmentation data is not copied: * buf_hdr.seg[] * buf_hdr.segcount @@ -155,7 +183,15 @@ static inline void *packet_map(odp_packet_hdr_t *pkt_hdr, int seg = 0; int seg_count = pkt_hdr->buf_hdr.segcount; - if (odp_unlikely(offset >= pkt_hdr->frame_len)) + /* Special processing for references */ + while (offset >= pkt_hdr->frame_len && pkt_hdr->ref_hdr) { + offset -= (pkt_hdr->frame_len - pkt_hdr->ref_offset); + offset += (pkt_hdr->ref_hdr->frame_len - pkt_hdr->ref_len); + pkt_hdr = pkt_hdr->ref_hdr; + seg_count = pkt_hdr->buf_hdr.segcount; + } + + if (odp_unlikely(offset > pkt_hdr->frame_len)) return NULL; if (odp_likely(CONFIG_PACKET_MAX_SEGS == 1 || seg_count == 1)) { @@ -249,6 +285,10 @@ static inline void packet_init(odp_packet_hdr_t *pkt_hdr, uint32_t len, CONFIG_PACKET_TAILROOM; pkt_hdr->input = ODP_PKTIO_INVALID; + + /* By default packet has no references */ + pkt_hdr->ref_hdr = NULL; + pkt_hdr->unshared_len = len; } static inline odp_packet_hdr_t *init_segments(odp_buffer_t buf[], int num) @@ -261,6 +301,7 @@ static inline odp_packet_hdr_t *init_segments(odp_buffer_t buf[], int num) pkt_hdr->buf_hdr.seg[0].data = pkt_hdr->buf_hdr.base_data; pkt_hdr->buf_hdr.seg[0].len = pkt_hdr->buf_hdr.base_len; + packet_ref_count_set(pkt_hdr, 1); /* Link segments */ if (odp_unlikely(CONFIG_PACKET_MAX_SEGS != 1)) { @@ -272,6 +313,7 @@ static inline odp_packet_hdr_t *init_segments(odp_buffer_t buf[], int num) odp_buffer_hdr_t *b_hdr; hdr = odp_packet_hdr((odp_packet_t)buf[i]); + packet_ref_count_set(hdr, 1); b_hdr = &hdr->buf_hdr; pkt_hdr->buf_hdr.seg[i].hdr = hdr; @@ -375,9 +417,10 @@ static inline odp_packet_hdr_t *add_segments(odp_packet_hdr_t *pkt_hdr, new_hdr->buf_hdr.seg[0].len = seg_len; packet_seg_copy_md(new_hdr, pkt_hdr); - new_hdr->frame_len = pkt_hdr->frame_len + len; - new_hdr->headroom = pool->headroom + offset; - new_hdr->tailroom = pkt_hdr->tailroom; + new_hdr->frame_len = pkt_hdr->frame_len + len; + new_hdr->unshared_len = pkt_hdr->unshared_len + len; + new_hdr->headroom = pool->headroom + offset; + new_hdr->tailroom = pkt_hdr->tailroom; pkt_hdr = new_hdr; } else { @@ -390,8 +433,9 @@ static inline odp_packet_hdr_t *add_segments(odp_packet_hdr_t *pkt_hdr, last = packet_last_seg(pkt_hdr); pkt_hdr->buf_hdr.seg[last].len = seg_len; - pkt_hdr->frame_len += len; - pkt_hdr->tailroom = pool->tailroom + offset; + pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; + pkt_hdr->tailroom = pool->tailroom + offset; } return pkt_hdr; @@ -399,13 +443,18 @@ static inline odp_packet_hdr_t *add_segments(odp_packet_hdr_t *pkt_hdr, static inline void free_bufs(odp_packet_hdr_t *pkt_hdr, int first, int num) { - int i; + int i, nfree; odp_buffer_t buf[num]; - for (i = 0; i < num; i++) - buf[i] = buffer_handle(pkt_hdr->buf_hdr.seg[first + i].hdr); + for (i = 0, nfree = 0; i < num; i++) { + odp_packet_hdr_t *hdr = pkt_hdr->buf_hdr.seg[first + i].hdr; - buffer_free_multi(buf, num); + if (packet_ref_dec(hdr) == 1) + buf[nfree++] = buffer_handle(hdr); + } + + if (nfree > 0) + buffer_free_multi(buf, nfree); } static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, @@ -416,11 +465,15 @@ static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, if (head) { odp_packet_hdr_t *new_hdr; - int i; + int i, nfree; odp_buffer_t buf[num]; - for (i = 0; i < num; i++) - buf[i] = buffer_handle(pkt_hdr->buf_hdr.seg[i].hdr); + for (i = 0, nfree = 0; i < num; i++) { + new_hdr = pkt_hdr->buf_hdr.seg[i].hdr; + + if (packet_ref_dec(new_hdr) == 1) + buf[nfree++] = buffer_handle(new_hdr); + } /* First remaining segment is the new packet descriptor */ new_hdr = pkt_hdr->buf_hdr.seg[num].hdr; @@ -429,15 +482,17 @@ static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, packet_seg_copy_md(new_hdr, pkt_hdr); /* Tailroom not changed */ - new_hdr->tailroom = pkt_hdr->tailroom; - new_hdr->headroom = seg_headroom(new_hdr, 0); - new_hdr->frame_len = pkt_hdr->frame_len - free_len; + new_hdr->tailroom = pkt_hdr->tailroom; + new_hdr->headroom = seg_headroom(new_hdr, 0); + new_hdr->frame_len = pkt_hdr->frame_len - free_len; + new_hdr->unshared_len = pkt_hdr->unshared_len - free_len; pull_head(new_hdr, pull_len); pkt_hdr = new_hdr; - buffer_free_multi(buf, num); + if (nfree > 0) + buffer_free_multi(buf, nfree); } else { /* Free last 'num' bufs */ free_bufs(pkt_hdr, num_remain, num); @@ -446,6 +501,7 @@ static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, * of the metadata. */ pkt_hdr->buf_hdr.segcount = num_remain; pkt_hdr->frame_len -= free_len; + pkt_hdr->unshared_len -= free_len; pkt_hdr->tailroom = seg_tailroom(pkt_hdr, num_remain - 1); pull_tail(pkt_hdr, pull_len); @@ -546,45 +602,34 @@ int odp_packet_alloc_multi(odp_pool_t pool_hdl, uint32_t len, return num; } -void odp_packet_free(odp_packet_t pkt) +static inline void packet_free(odp_packet_hdr_t *pkt_hdr) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - int num_seg = pkt_hdr->buf_hdr.segcount; + odp_packet_hdr_t *ref_hdr; + uint32_t ref_count; - if (odp_likely(CONFIG_PACKET_MAX_SEGS == 1 || num_seg == 1)) - buffer_free_multi((odp_buffer_t *)&pkt, 1); - else - free_bufs(pkt_hdr, 0, num_seg); -} + do { + ref_hdr = pkt_hdr->ref_hdr; + ref_count = packet_ref_count(pkt_hdr) - 1; + free_bufs(pkt_hdr, 0, pkt_hdr->buf_hdr.segcount); -void odp_packet_free_multi(const odp_packet_t pkt[], int num) -{ - if (CONFIG_PACKET_MAX_SEGS == 1) { - buffer_free_multi((const odp_buffer_t * const)pkt, num); - } else { - odp_buffer_t buf[num * CONFIG_PACKET_MAX_SEGS]; - int i, j; - int bufs = 0; - - for (i = 0; i < num; i++) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt[i]); - int num_seg = pkt_hdr->buf_hdr.segcount; - odp_buffer_hdr_t *buf_hdr = &pkt_hdr->buf_hdr; + if (ref_count == 1) + pkt_hdr->unshared_len = pkt_hdr->frame_len; - buf[bufs] = (odp_buffer_t)pkt[i]; - bufs++; + pkt_hdr = ref_hdr; + } while (pkt_hdr); +} - if (odp_likely(num_seg == 1)) - continue; +void odp_packet_free(odp_packet_t pkt) +{ + packet_free(odp_packet_hdr(pkt)); +} - for (j = 1; j < num_seg; j++) { - buf[bufs] = buffer_handle(buf_hdr->seg[j].hdr); - bufs++; - } - } +void odp_packet_free_multi(const odp_packet_t pkt[], int num) +{ + int i; - buffer_free_multi(buf, bufs); - } + for (i = 0; i < num; i++) + packet_free(odp_packet_hdr(pkt[i])); } int odp_packet_reset(odp_packet_t pkt, uint32_t len) @@ -595,6 +640,9 @@ int odp_packet_reset(odp_packet_t pkt, uint32_t len) if (len > pool->headroom + pool->data_size + pool->tailroom) return -1; + if (pkt_hdr->ref_hdr) + packet_free(pkt_hdr->ref_hdr); + packet_init(pkt_hdr, len, 0); return 0; @@ -637,15 +685,21 @@ void *odp_packet_head(odp_packet_t pkt) uint32_t odp_packet_buf_len(odp_packet_t pkt) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t buf_len = 0; - return pkt_hdr->buf_hdr.size * pkt_hdr->buf_hdr.segcount; + do { + buf_len += pkt_hdr->buf_hdr.size * pkt_hdr->buf_hdr.segcount; + pkt_hdr = pkt_hdr->ref_hdr; + } while (pkt_hdr); + + return buf_len; } void *odp_packet_data(odp_packet_t pkt) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - return packet_data(pkt_hdr); + return packet_map(pkt_hdr, 0, NULL, NULL); } uint32_t odp_packet_seg_len(odp_packet_t pkt) @@ -657,7 +711,32 @@ uint32_t odp_packet_seg_len(odp_packet_t pkt) uint32_t odp_packet_len(odp_packet_t pkt) { - return odp_packet_hdr(pkt)->frame_len; + return packet_len(odp_packet_hdr(pkt)); +} + +uint32_t odp_packet_unshared_len(odp_packet_t pkt) +{ + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t pkt_len = 0, offset = 0; + + do { + if (packet_ref_count(pkt_hdr) > 1) { + if (offset == 0) + pkt_len += pkt_hdr->unshared_len; + break; + } + + pkt_len += pkt_hdr->frame_len - offset; + offset = pkt_hdr->ref_offset; + + if (pkt_hdr->ref_hdr) + offset += (pkt_hdr->ref_hdr->frame_len - + pkt_hdr->ref_len); + + pkt_hdr = pkt_hdr->ref_hdr; + } while (pkt_hdr); + + return pkt_len; } uint32_t odp_packet_headroom(odp_packet_t pkt) @@ -667,12 +746,12 @@ uint32_t odp_packet_headroom(odp_packet_t pkt) uint32_t odp_packet_tailroom(odp_packet_t pkt) { - return odp_packet_hdr(pkt)->tailroom; + return odp_packet_last_hdr(pkt, NULL)->tailroom; } void *odp_packet_tail(odp_packet_t pkt) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + odp_packet_hdr_t *pkt_hdr = odp_packet_last_hdr(pkt, NULL); return packet_tail(pkt_hdr); } @@ -871,7 +950,7 @@ int odp_packet_extend_head(odp_packet_t *pkt, uint32_t len, { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(*pkt); uint32_t frame_len = pkt_hdr->frame_len; - uint32_t headroom = pkt_hdr->headroom; + uint32_t headroom = pkt_hdr->headroom; int ret = 0; if (len > headroom) { @@ -886,6 +965,46 @@ int odp_packet_extend_head(odp_packet_t *pkt, uint32_t len, segs = pkt_hdr->buf_hdr.segcount; if (odp_unlikely((segs + num) > CONFIG_PACKET_MAX_SEGS)) { + /* Handle recursively via references when + * working with referenced packets since another + * thread may be accessing it concurrently via + * its reference to it. */ + if (packet_ref_count(pkt_hdr) > 1) { + odp_packet_t ref; + uint32_t unshared_len; + + push_head(pkt_hdr, headroom); + unshared_len = pkt_hdr->unshared_len; + ref = odp_packet_ref(*pkt, 0); + + if (ref == ODP_PACKET_INVALID) { + pull_head(pkt_hdr, headroom); + return -1; + } + + ret = odp_packet_extend_head(&ref, + len - headroom, + data_ptr, + seg_len); + + if (ret < 0) { + odp_packet_free(ref); + pull_head(pkt_hdr, headroom); + return -1; + } + + /* Since this is a special ref, the + * base pkt's unshared len is unchanged */ + pkt_hdr->unshared_len = unshared_len; + + /* Remove extra ref to the base pkt */ + odp_packet_free(*pkt); + + /* Return the ref as the extension result */ + *pkt = ref; + return 1; + } + /* Cannot directly add new segments */ odp_packet_hdr_t *new_hdr; int new_segs = 0; @@ -938,6 +1057,7 @@ int odp_packet_extend_head(odp_packet_t *pkt, uint32_t len, pkt_hdr->buf_hdr.segcount = segs; pkt_hdr->frame_len = frame_len; + pkt_hdr->unshared_len = frame_len; pkt_hdr->headroom = offset + pool->headroom; pkt_hdr->tailroom = pool->tailroom; @@ -963,11 +1083,16 @@ int odp_packet_extend_head(odp_packet_t *pkt, uint32_t len, push_head(pkt_hdr, len); } - if (data_ptr) - *data_ptr = packet_data(pkt_hdr); + if (data_ptr || seg_len) { + uint32_t seg_ln = 0; + void *data = packet_map(pkt_hdr, 0, &seg_ln, NULL); - if (seg_len) - *seg_len = packet_first_seg_len(pkt_hdr); + if (data_ptr) + *data_ptr = data; + + if (seg_len) + *seg_len = seg_ln; + } return ret; } @@ -979,6 +1104,8 @@ void *odp_packet_pull_head(odp_packet_t pkt, uint32_t len) if (len > pkt_hdr->frame_len) return NULL; + ODP_ASSERT(len <= pkt_hdr->unshared_len); + pull_head(pkt_hdr, len); return packet_data(pkt_hdr); } @@ -986,15 +1113,35 @@ void *odp_packet_pull_head(odp_packet_t pkt, uint32_t len) int odp_packet_trunc_head(odp_packet_t *pkt, uint32_t len, void **data_ptr, uint32_t *seg_len_out) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(*pkt); + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(*pkt), *nxt_hdr; uint32_t seg_len = packet_first_seg_len(pkt_hdr); + int ret = 0; - if (len > pkt_hdr->frame_len) + if (len > packet_len(pkt_hdr)) return -1; - if (len < seg_len) { + ODP_ASSERT(len <= odp_packet_unshared_len(*pkt)); + + /* Special processing for references */ + while (len >= pkt_hdr->frame_len && pkt_hdr->ref_hdr) { + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); + nxt_hdr = pkt_hdr->ref_hdr; + len -= pkt_hdr->frame_len; + len += pkt_hdr->ref_offset + + (nxt_hdr->frame_len - pkt_hdr->ref_len); + pkt_hdr->ref_hdr = NULL; + packet_free(pkt_hdr); + pkt_hdr = nxt_hdr; + seg_len = packet_first_seg_len(pkt_hdr); + *pkt = packet_handle(pkt_hdr); + ret = 1; + } + + if (CONFIG_PACKET_MAX_SEGS == 1 || + len < seg_len || + pkt_hdr->buf_hdr.segcount == 1) { pull_head(pkt_hdr, len); - } else if (CONFIG_PACKET_MAX_SEGS != 1) { + } else { int num = 0; uint32_t pull_len = 0; @@ -1009,23 +1156,29 @@ int odp_packet_trunc_head(odp_packet_t *pkt, uint32_t len, *pkt = packet_handle(pkt_hdr); } - if (data_ptr) - *data_ptr = packet_data(pkt_hdr); + if (data_ptr || seg_len_out) { + void *data_head = packet_map(pkt_hdr, 0, &seg_len, NULL); - if (seg_len_out) - *seg_len_out = packet_first_seg_len(pkt_hdr); + if (data_ptr) + *data_ptr = data_head; - return 0; + if (seg_len_out) + *seg_len_out = seg_len; + } + + return ret; } void *odp_packet_push_tail(odp_packet_t pkt, uint32_t len) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + odp_packet_hdr_t *pkt_hdr = odp_packet_last_hdr(pkt, NULL); void *old_tail; if (len > pkt_hdr->tailroom) return NULL; + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); + old_tail = packet_tail(pkt_hdr); push_tail(pkt_hdr, len); @@ -1035,12 +1188,14 @@ void *odp_packet_push_tail(odp_packet_t pkt, uint32_t len) int odp_packet_extend_tail(odp_packet_t *pkt, uint32_t len, void **data_ptr, uint32_t *seg_len_out) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(*pkt); + odp_packet_hdr_t *pkt_hdr = odp_packet_last_hdr(*pkt, NULL); uint32_t frame_len = pkt_hdr->frame_len; uint32_t tailroom = pkt_hdr->tailroom; uint32_t tail_off = frame_len; int ret = 0; + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); + if (len > tailroom) { pool_t *pool = pool_entry_from_hdl(pkt_hdr->buf_hdr.pool_hdl); int num; @@ -1132,6 +1287,7 @@ void *odp_packet_pull_tail(odp_packet_t pkt, uint32_t len) if (len > packet_last_seg_len(pkt_hdr)) return NULL; + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); pull_tail(pkt_hdr, len); return packet_tail(pkt_hdr); @@ -1142,17 +1298,34 @@ int odp_packet_trunc_tail(odp_packet_t *pkt, uint32_t len, { int last; uint32_t seg_len; - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(*pkt); + uint32_t offset; + odp_packet_hdr_t *first_hdr = odp_packet_hdr(*pkt); + odp_packet_hdr_t *pkt_hdr, *prev_hdr; - if (len > pkt_hdr->frame_len) + if (len > packet_len(first_hdr)) return -1; + pkt_hdr = odp_packet_last_hdr(*pkt, &offset); + + /* Special processing for references */ + while (len >= pkt_hdr->frame_len - offset && first_hdr->ref_hdr) { + len -= (pkt_hdr->frame_len - offset); + prev_hdr = odp_packet_prev_hdr(first_hdr, pkt_hdr, &offset); + ODP_ASSERT(packet_ref_count(prev_hdr) == 1); + prev_hdr->ref_hdr = NULL; + packet_free(pkt_hdr); + pkt_hdr = prev_hdr; + } + + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); last = packet_last_seg(pkt_hdr); seg_len = packet_seg_len(pkt_hdr, last); - if (len < seg_len) { + if (CONFIG_PACKET_MAX_SEGS == 1 || + len < seg_len || + pkt_hdr->buf_hdr.segcount == 1) { pull_tail(pkt_hdr, len); - } else if (CONFIG_PACKET_MAX_SEGS != 1) { + } else { int num = 0; uint32_t pull_len = 0; @@ -1359,35 +1532,50 @@ void odp_packet_ts_set(odp_packet_t pkt, odp_time_t timestamp) int odp_packet_is_segmented(odp_packet_t pkt) { - return odp_packet_hdr(pkt)->buf_hdr.segcount > 1; + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + + return pkt_hdr->buf_hdr.segcount > 1 || pkt_hdr->ref_hdr != NULL; } int odp_packet_num_segs(odp_packet_t pkt) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t segcount = 0, i; + uint32_t seg_offset = 0, offset; + + do { + segcount += pkt_hdr->buf_hdr.segcount - seg_offset; + offset = pkt_hdr->ref_offset; + pkt_hdr = pkt_hdr->ref_hdr; + if (pkt_hdr) { + for (i = 0, seg_offset = 0; + i < pkt_hdr->buf_hdr.segcount; + i++, seg_offset++) { + if (offset < pkt_hdr->buf_hdr.seg[i].len) + break; + offset -= pkt_hdr->buf_hdr.seg[i].len; + } + } + } while (pkt_hdr); - return pkt_hdr->buf_hdr.segcount; + return segcount; } -odp_packet_seg_t odp_packet_first_seg(odp_packet_t pkt) +odp_packet_seg_t odp_packet_first_seg(odp_packet_t pkt ODP_UNUSED) { - (void)pkt; - return 0; } odp_packet_seg_t odp_packet_last_seg(odp_packet_t pkt) { - odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - - return packet_last_seg(pkt_hdr); + return (odp_packet_seg_t)(odp_packet_num_segs(pkt) - 1); } odp_packet_seg_t odp_packet_next_seg(odp_packet_t pkt, odp_packet_seg_t seg) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - if (odp_unlikely(seg >= (odp_packet_seg_t)packet_last_seg(pkt_hdr))) + if (odp_unlikely(seg >= packet_last_seg(pkt_hdr))) return ODP_PACKET_SEG_INVALID; return seg + 1; @@ -1403,21 +1591,51 @@ odp_packet_seg_t odp_packet_next_seg(odp_packet_t pkt, odp_packet_seg_t seg) void *odp_packet_seg_data(odp_packet_t pkt, odp_packet_seg_t seg) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t seg_offset = 0, offset = 0, i; + + while (seg >= pkt_hdr->buf_hdr.segcount - seg_offset && + pkt_hdr->ref_hdr) { + seg -= (pkt_hdr->buf_hdr.segcount - seg_offset); + offset = pkt_hdr->ref_offset; + pkt_hdr = pkt_hdr->ref_hdr; + for (i = 0, seg_offset = 0; + i < pkt_hdr->buf_hdr.segcount; + i++, seg_offset++) { + if (offset < pkt_hdr->buf_hdr.seg[i].len) + break; + offset -= pkt_hdr->buf_hdr.seg[i].len; + } + } - if (odp_unlikely(seg >= pkt_hdr->buf_hdr.segcount)) + if (odp_unlikely(seg + seg_offset >= pkt_hdr->buf_hdr.segcount)) return NULL; - return packet_seg_data(pkt_hdr, seg); + return packet_seg_data(pkt_hdr, seg + seg_offset) + offset; } uint32_t odp_packet_seg_data_len(odp_packet_t pkt, odp_packet_seg_t seg) { odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t seg_offset = 0, offset = 0, i; + + while (seg >= pkt_hdr->buf_hdr.segcount - seg_offset && + pkt_hdr->ref_hdr) { + seg -= (pkt_hdr->buf_hdr.segcount - seg_offset); + offset = pkt_hdr->ref_offset; + pkt_hdr = pkt_hdr->ref_hdr; + for (i = 0, seg_offset = 0; + i < pkt_hdr->buf_hdr.segcount; + i++, seg_offset++) { + if (offset < pkt_hdr->buf_hdr.seg[i].len) + break; + offset -= pkt_hdr->buf_hdr.seg[i].len; + } + } - if (odp_unlikely(seg >= pkt_hdr->buf_hdr.segcount)) + if (odp_unlikely(seg + seg_offset >= pkt_hdr->buf_hdr.segcount)) return 0; - return packet_seg_len(pkt_hdr, seg); + return packet_seg_len(pkt_hdr, seg + seg_offset) - offset; } /* @@ -1431,12 +1649,14 @@ int odp_packet_add_data(odp_packet_t *pkt_ptr, uint32_t offset, uint32_t len) { odp_packet_t pkt = *pkt_ptr; odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - uint32_t pktlen = pkt_hdr->frame_len; + uint32_t pktlen = packet_len(pkt_hdr); odp_packet_t newpkt; if (offset > pktlen) return -1; + ODP_ASSERT(odp_packet_unshared_len(*pkt_ptr) >= offset); + newpkt = odp_packet_alloc(pkt_hdr->buf_hdr.pool_hdl, pktlen + len); if (newpkt == ODP_PACKET_INVALID) @@ -1499,6 +1719,9 @@ int odp_packet_align(odp_packet_t *pkt, uint32_t offset, uint32_t len, if (align > ODP_CACHE_LINE_SIZE) return -1; + ODP_ASSERT(odp_packet_has_ref(*pkt) == 0 && + odp_packet_is_ref(*pkt) == 0); + if (seglen >= len) { misalign = align <= 1 ? 0 : ODP_ALIGN_ROUNDUP(uaddr, align) - uaddr; @@ -1538,10 +1761,13 @@ int odp_packet_concat(odp_packet_t *dst, odp_packet_t src) uint32_t dst_len = dst_hdr->frame_len; uint32_t src_len = src_hdr->frame_len; + ODP_ASSERT(packet_ref_count(dst_hdr) == 1); + /* Do a copy if resulting packet would be out of segments or packets - * are from different pools. */ + * are from different pools or src is a reference. */ if (odp_unlikely((dst_segs + src_segs) > CONFIG_PACKET_MAX_SEGS) || - odp_unlikely(dst_pool != src_pool)) { + odp_unlikely(dst_pool != src_pool) || + odp_unlikely(packet_ref_count(src_hdr)) > 1) { if (odp_packet_extend_tail(dst, src_len, NULL, NULL) >= 0) { (void)odp_packet_copy_from_pkt(*dst, dst_len, src, 0, src_len); @@ -1556,8 +1782,9 @@ int odp_packet_concat(odp_packet_t *dst, odp_packet_t src) add_all_segs(dst_hdr, src_hdr); - dst_hdr->frame_len = dst_len + src_len; - dst_hdr->tailroom = src_hdr->tailroom; + dst_hdr->frame_len = dst_len + src_len; + dst_hdr->unshared_len = dst_len + src_len; + dst_hdr->tailroom = src_hdr->tailroom; /* Data was not moved in memory */ return 0; @@ -1570,6 +1797,7 @@ int odp_packet_split(odp_packet_t *pkt, uint32_t len, odp_packet_t *tail) if (len >= pktlen || tail == NULL) return -1; + ODP_ASSERT(odp_packet_unshared_len(*pkt) >= len); *tail = odp_packet_copy_part(*pkt, len, pktlen - len, odp_packet_pool(*pkt)); @@ -1580,6 +1808,114 @@ int odp_packet_split(odp_packet_t *pkt, uint32_t len, odp_packet_t *tail) } /* + * References + */ + +static inline void packet_ref(odp_packet_hdr_t *pkt_hdr) +{ + uint32_t i; + odp_packet_hdr_t *hdr; + + do { + for (i = 0; i < pkt_hdr->buf_hdr.segcount; i++) { + hdr = pkt_hdr->buf_hdr.seg[i].hdr; + packet_ref_inc(hdr); + } + + pkt_hdr = pkt_hdr->ref_hdr; + } while (pkt_hdr); +} + +static inline odp_packet_t packet_splice(odp_packet_t pkt, uint32_t offset, + odp_packet_t hdr) +{ + odp_packet_hdr_t *ref_hdr, *pkt_hdr; + + pkt_hdr = odp_packet_hdr(pkt); + ref_hdr = odp_packet_hdr(hdr); + + /* Catch attempted references to stale handles in debug builds */ + ODP_ASSERT(packet_ref_count(pkt_hdr) > 0); + + /* Splicing is from the last section of src pkt */ + while (ref_hdr->ref_hdr) + ref_hdr = ref_hdr->ref_hdr; + + /* Find section where splice begins */ + while (offset >= pkt_hdr->frame_len && pkt_hdr->ref_hdr) { + offset -= (pkt_hdr->frame_len - pkt_hdr->ref_offset); + offset += (pkt_hdr->ref_hdr->frame_len - pkt_hdr->ref_len); + pkt_hdr = pkt_hdr->ref_hdr; + } + + ref_hdr->ref_hdr = pkt_hdr; + ref_hdr->ref_offset = offset; + ref_hdr->ref_len = pkt_hdr->frame_len; + + if (offset < pkt_hdr->unshared_len) + pkt_hdr->unshared_len = offset; + + packet_ref(pkt_hdr); + return hdr; +} + +odp_packet_t odp_packet_ref_static(odp_packet_t pkt) +{ + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + + pkt_hdr->unshared_len = 0; + packet_ref(pkt_hdr); + return pkt; +} + +odp_packet_t odp_packet_ref(odp_packet_t pkt, uint32_t offset) +{ + odp_packet_t hdr; + + if (pkt == ODP_PACKET_INVALID || offset >= odp_packet_len(pkt)) + return ODP_PACKET_INVALID; + + hdr = odp_packet_alloc(odp_packet_pool(pkt), 0); + + if (hdr == ODP_PACKET_INVALID) + return ODP_PACKET_INVALID; + + return packet_splice(pkt, offset, hdr); +} + +odp_packet_t odp_packet_ref_pkt(odp_packet_t pkt, uint32_t offset, + odp_packet_t hdr) +{ + if (pkt == ODP_PACKET_INVALID || + pkt == hdr || + offset >= odp_packet_len(pkt)) + return ODP_PACKET_INVALID; + + if (hdr == ODP_PACKET_INVALID) + return odp_packet_ref(pkt, offset); + + return packet_splice(pkt, offset, hdr); +} + +int odp_packet_is_ref(odp_packet_t pkt) +{ + odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); + uint32_t ref_count = 0; + + while (pkt_hdr->ref_hdr) { + ref_count++; + pkt_hdr = pkt_hdr->ref_hdr; + } + + return ref_count; +} + +int odp_packet_has_ref(odp_packet_t pkt) +{ + return packet_ref_count(odp_packet_hdr(pkt)) - 1; +} + +/* * * Copy * ******************************************************** @@ -1588,8 +1924,7 @@ int odp_packet_split(odp_packet_t *pkt, uint32_t len, odp_packet_t *tail) odp_packet_t odp_packet_copy(odp_packet_t pkt, odp_pool_t pool) { - odp_packet_hdr_t *srchdr = odp_packet_hdr(pkt); - uint32_t pktlen = srchdr->frame_len; + uint32_t pktlen = odp_packet_len(pkt); odp_packet_t newpkt = odp_packet_alloc(pool, pktlen); if (newpkt != ODP_PACKET_INVALID) { @@ -1628,7 +1963,7 @@ int odp_packet_copy_to_mem(odp_packet_t pkt, uint32_t offset, uint8_t *dstaddr = (uint8_t *)dst; odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - if (offset + len > pkt_hdr->frame_len) + if (offset + len > packet_len(pkt_hdr)) return -1; while (len > 0) { @@ -1652,9 +1987,11 @@ int odp_packet_copy_from_mem(odp_packet_t pkt, uint32_t offset, const uint8_t *srcaddr = (const uint8_t *)src; odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt); - if (offset + len > pkt_hdr->frame_len) + if (offset + len > packet_len(pkt_hdr)) return -1; + ODP_ASSERT(odp_packet_unshared_len(pkt) >= offset + len); + while (len > 0) { mapaddr = packet_map(pkt_hdr, offset, &seglen, NULL); cpylen = len > seglen ? seglen : len; @@ -1680,10 +2017,12 @@ int odp_packet_copy_from_pkt(odp_packet_t dst, uint32_t dst_offset, uint32_t src_seglen = 0; /* GCC */ int overlap; - if (dst_offset + len > dst_hdr->frame_len || - src_offset + len > src_hdr->frame_len) + if (dst_offset + len > packet_len(dst_hdr) || + src_offset + len > packet_len(src_hdr)) return -1; + ODP_ASSERT(odp_packet_unshared_len(dst) >= dst_offset + len); + overlap = (dst_hdr == src_hdr && ((dst_offset <= src_offset && dst_offset + len >= src_offset) || @@ -1767,7 +2106,7 @@ void odp_packet_print(odp_packet_t pkt) len += snprintf(&str[len], n - len, " l4_offset %" PRIu32 "\n", hdr->p.l4_offset); len += snprintf(&str[len], n - len, - " frame_len %" PRIu32 "\n", hdr->frame_len); + " frame_len %" PRIu32 "\n", packet_len(hdr)); len += snprintf(&str[len], n - len, " input %" PRIu64 "\n", odp_pktio_to_u64(hdr->input));