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GET /api/patches/17238/?format=api
{ "id": 17238, "url": "http://patchwork.dpdk.org/api/patches/17238/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/1479981261-19512-8-git-send-email-olivier.matz@6wind.com/", "project": { "id": 1, "url": "http://patchwork.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1479981261-19512-8-git-send-email-olivier.matz@6wind.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1479981261-19512-8-git-send-email-olivier.matz@6wind.com", "date": "2016-11-24T09:54:19", "name": "[dpdk-dev,RFC,7/9] net/igb: add handler for tx queue descriptor count", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "e72163baa76d9062e0f2a2905814d61d49178494", "submitter": { "id": 8, "url": "http://patchwork.dpdk.org/api/people/8/?format=api", "name": "Olivier Matz", "email": "olivier.matz@6wind.com" }, "delegate": { "id": 1, "url": "http://patchwork.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/1479981261-19512-8-git-send-email-olivier.matz@6wind.com/mbox/", "series": [], "comments": "http://patchwork.dpdk.org/api/patches/17238/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/17238/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id F0BB65922;\n\tThu, 24 Nov 2016 11:00:40 +0100 (CET)", "from proxy.6wind.com (host.76.145.23.62.rev.coltfrance.com\n\t[62.23.145.76]) by dpdk.org (Postfix) with ESMTP id D79D04A59\n\tfor <dev@dpdk.org>; Thu, 24 Nov 2016 10:59:38 +0100 (CET)", "from glumotte.dev.6wind.com (unknown [10.16.0.195])\n\tby proxy.6wind.com (Postfix) with ESMTP id 804D92646D;\n\tThu, 24 Nov 2016 10:59:34 +0100 (CET)" ], "From": "Olivier Matz <olivier.matz@6wind.com>", "To": "dev@dpdk.org", "Cc": "thomas.monjalon@6wind.com, konstantin.ananyev@intel.com,\n\twenzhuo.lu@intel.com, helin.zhang@intel.com", "Date": "Thu, 24 Nov 2016 10:54:19 +0100", "Message-Id": "<1479981261-19512-8-git-send-email-olivier.matz@6wind.com>", "X-Mailer": "git-send-email 2.8.1", "In-Reply-To": "<1479981261-19512-1-git-send-email-olivier.matz@6wind.com>", "References": "<1479981261-19512-1-git-send-email-olivier.matz@6wind.com>", "Subject": "[dpdk-dev] [RFC 7/9] net/igb: add handler for tx queue descriptor\n\tcount", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "patches and discussions about DPDK <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<http://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Like for TX, use a binary search algorithm to get the number of used Tx\ndescriptors.\n\nPR=52423\nSigned-off-by: Olivier Matz <olivier.matz@6wind.com>\nAcked-by: Ivan Boule <ivan.boule@6wind.com>\n---\n drivers/net/e1000/e1000_ethdev.h | 5 +++-\n drivers/net/e1000/igb_ethdev.c | 1 +\n drivers/net/e1000/igb_rxtx.c | 51 ++++++++++++++++++++++++++++++++++++++++\n 3 files changed, 56 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/net/e1000/e1000_ethdev.h b/drivers/net/e1000/e1000_ethdev.h\nindex 6c25c8d..ad9ddaf 100644\n--- a/drivers/net/e1000/e1000_ethdev.h\n+++ b/drivers/net/e1000/e1000_ethdev.h\n@@ -300,7 +300,10 @@ int eth_igb_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,\n \t\tstruct rte_mempool *mb_pool);\n \n uint32_t eth_igb_rx_queue_count(struct rte_eth_dev *dev,\n-\t\tuint16_t rx_queue_id);\n+\t\t\t\tuint16_t rx_queue_id);\n+\n+uint32_t eth_igb_tx_queue_count(struct rte_eth_dev *dev,\n+\t\t\t\tuint16_t tx_queue_id);\n \n int eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset);\n \ndiff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c\nindex 08f2a68..a54d374 100644\n--- a/drivers/net/e1000/igb_ethdev.c\n+++ b/drivers/net/e1000/igb_ethdev.c\n@@ -399,6 +399,7 @@ static const struct eth_dev_ops eth_igb_ops = {\n \t.rx_queue_intr_disable = eth_igb_rx_queue_intr_disable,\n \t.rx_queue_release = eth_igb_rx_queue_release,\n \t.rx_queue_count = eth_igb_rx_queue_count,\n+\t.tx_queue_count = eth_igb_tx_queue_count,\n \t.rx_descriptor_done = eth_igb_rx_descriptor_done,\n \t.tx_queue_setup = eth_igb_tx_queue_setup,\n \t.tx_queue_release = eth_igb_tx_queue_release,\ndiff --git a/drivers/net/e1000/igb_rxtx.c b/drivers/net/e1000/igb_rxtx.c\nindex 6b0111f..2ff2417 100644\n--- a/drivers/net/e1000/igb_rxtx.c\n+++ b/drivers/net/e1000/igb_rxtx.c\n@@ -1554,6 +1554,57 @@ eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)\n \treturn offset;\n }\n \n+uint32_t\n+eth_igb_tx_queue_count(struct rte_eth_dev *dev, uint16_t tx_queue_id)\n+{\n+\tvolatile uint32_t *status;\n+\tstruct igb_tx_queue *txq;\n+\tint32_t offset, interval, idx, resolution;\n+\n+\ttxq = dev->data->tx_queues[tx_queue_id];\n+\n+\t/* check if ring empty */\n+\tidx = txq->tx_tail - 1;\n+\tif (idx < 0)\n+\t\tidx += txq->nb_tx_desc;\n+\tstatus = &txq->tx_ring[idx].wb.status;\n+\tif (*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD))\n+\t\treturn 0;\n+\n+\t/* check if ring full */\n+\tidx = txq->tx_tail + 1;\n+\tif (idx >= txq->nb_tx_desc)\n+\t\tidx -= txq->nb_tx_desc;\n+\tstatus = &txq->tx_ring[idx].wb.status;\n+\tif (!(*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD)))\n+\t\treturn txq->nb_tx_desc;\n+\n+\t/* decrease the precision if ring is large */\n+\tif (txq->nb_tx_desc <= 256)\n+\t\tresolution = 4;\n+\telse\n+\t\tresolution = 16;\n+\n+\t/* use a binary search */\n+\tinterval = txq->nb_tx_desc >> 1;\n+\toffset = interval;\n+\n+\tdo {\n+\t\tinterval >>= 1;\n+\t\tidx = txq->tx_tail + offset;\n+\t\tif (idx >= txq->nb_tx_desc)\n+\t\t\tidx -= txq->nb_tx_desc;\n+\n+\t\tstatus = &txq->tx_ring[idx].wb.status;\n+\t\tif (*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD))\n+\t\t\toffset += interval;\n+\t\telse\n+\t\t\toffset -= interval;\n+\t} while (interval >= resolution);\n+\n+\treturn txq->nb_tx_desc - offset;\n+}\n+\n int\n eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)\n {\n", "prefixes": [ "dpdk-dev", "RFC", "7/9" ] }