From: Ferruh Yigit <ferruh.yigit@intel.com> To: Chengchang Tang <tangchengchang@huawei.com>, Matan Azrad <matan@nvidia.com>, "dev@dpdk.org" <dev@dpdk.org> Cc: "maryam.tahhan@intel.com" <maryam.tahhan@intel.com>, "linuxarm@huawei.com" <linuxarm@huawei.com>, "wenzhuo.lu@intel.com" <wenzhuo.lu@intel.com>, NBU-Contact-Thomas Monjalon <thomas@monjalon.net>, "arybchenko@solarflare.com" <arybchenko@solarflare.com> Subject: Re: [dpdk-dev] [PATCH v3 1/4] ethdev: add a field for rxq info structure Date: Thu, 3 Sep 2020 15:55:48 +0100 Message-ID: <c02d80eb-9916-3bc9-1b83-82b2b59bba7c@intel.com> (raw) In-Reply-To: <d8b00373-851a-4650-b5a1-89f4c452be15@huawei.com> On 9/2/2020 4:52 AM, Chengchang Tang wrote: > Hi, Matan > > On 2020/9/1 23:33, Matan Azrad wrote: >> >> Hi Chengchang >> >> Please see some question below. >> >> From: Chengchang Tang >>> Add a field named rx_buf_size in rte_eth_rxq_info to indicate the buffer size >>> used in receiving packets for HW. >>> >>> In this way, upper-layer users can get this information by calling >>> rte_eth_rx_queue_info_get. >>> >>> Signed-off-by: Chengchang Tang <tangchengchang@huawei.com> >>> Reviewed-by: Wei Hu (Xavier) <xavier.huwei@huawei.com> >>> Acked-by: Andrew Rybchenko <arybchenko@solarflare.com> >>> --- >>> lib/librte_ethdev/rte_ethdev.h | 2 ++ >>> 1 file changed, 2 insertions(+) >>> >>> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h >>> index 70295d7..9fed5cb 100644 >>> --- a/lib/librte_ethdev/rte_ethdev.h >>> +++ b/lib/librte_ethdev/rte_ethdev.h >>> @@ -1420,6 +1420,8 @@ struct rte_eth_rxq_info { >>> struct rte_eth_rxconf conf; /**< queue config parameters. */ >>> uint8_t scattered_rx; /**< scattered packets RX supported. */ >>> uint16_t nb_desc; /**< configured number of RXDs. */ >>> + /**< buffer size used for hardware when receive packets. */ >>> + uint16_t rx_buf_size; >> >> Is it the maximum supported Rx buffer by the HW? >> If yes, maybe max_rx_buf_size is better name? > > No, it is the Rx buffer size currently used by HW. > > IMHO, the structure rte_eth_rxq_info and associated query API are mainly used to query HW configurations > at runtime or after queue is configured/setup. Therefore, the content of this structure should be the > current HW configuration. > >> Maybe document that 0 means - no limitation by HW? > > Yes, there is no need to fill this filed for HW that has no restrictions on it. > I'll add it in v4. This field in not for max Rx buffer size, so HW restriction doesn't really apply here. But as far as I remember it has been decided that the field will be optional for PMDs, agree to document that part. > >> Must application read it in order to know if its datapath should handle multi-segment buffers? > > I think it's more appropriate to use scattered_rx to determine if multi-segment buffers should be handled. > >> >> Maybe it will be good to force application to configure scatter when this field is valid and smaller than max_rx_pkt_len\max_lro.. (<= room size)... >> >> >>> } __rte_cache_min_aligned; >>> >>> /** > >
next prev parent reply other threads:[~2020-09-03 14:55 UTC|newest] Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-18 12:35 [dpdk-dev] [RFC] ethdev: add a field for rte_eth_rxq_info Chengchang Tang 2020-08-26 1:57 ` [dpdk-dev] [PATCH 0/3] add RX buffer size " Chengchang Tang 2020-08-26 1:57 ` [dpdk-dev] [PATCH 1/3] ethdev: add a field " Chengchang Tang 2020-08-26 1:57 ` [dpdk-dev] [PATCH 2/3] app/testpmd: Add RX buffer size display in queue info querry Chengchang Tang 2020-08-26 1:57 ` [dpdk-dev] [PATCH 3/3] net/hns3: add RX buffer size to rx qinfo querry Chengchang Tang 2020-08-26 7:12 ` [dpdk-dev] [PATCH v2 0/3] add Rx buffer size for rxq info structure Chengchang Tang 2020-08-26 7:12 ` [dpdk-dev] [PATCH v2 1/3] ethdev: add a field " Chengchang Tang 2020-08-26 7:29 ` Wei Hu (Xavier) 2020-08-26 7:12 ` [dpdk-dev] [PATCH v2 2/3] app/testpmd: add Rx buffer size display in queue info query Chengchang Tang 2020-08-26 7:28 ` Wei Hu (Xavier) 2020-08-26 14:42 ` Stephen Hemminger 2020-08-29 6:48 ` Chengchang Tang 2020-08-26 7:12 ` [dpdk-dev] [PATCH v2 3/3] net/hns3: add Rx buffer size to Rx qinfo query Chengchang Tang 2020-08-26 7:20 ` Wei Hu (Xavier) 2020-08-29 7:13 ` [dpdk-dev] [PATCH v3 0/4] add Rx buffer size for rxq info structure Chengchang Tang 2020-08-29 7:13 ` [dpdk-dev] [PATCH v3 1/4] ethdev: add a field " Chengchang Tang 2020-09-01 15:33 ` Matan Azrad 2020-09-02 3:52 ` Chengchang Tang 2020-09-02 7:19 ` Matan Azrad 2020-09-02 10:01 ` Chengchang Tang 2020-09-02 10:30 ` Matan Azrad 2020-09-03 1:48 ` Chengchang Tang 2020-09-06 13:45 ` Matan Azrad 2020-09-07 7:47 ` Chengchang Tang 2020-09-07 8:28 ` Matan Azrad 2020-09-07 12:06 ` Chengchang Tang 2020-09-07 13:02 ` Matan Azrad 2020-09-03 15:00 ` Ferruh Yigit 2020-09-03 14:55 ` Ferruh Yigit [this message] 2020-09-03 15:01 ` Ferruh Yigit 2020-09-04 1:43 ` Chengchang Tang 2020-09-03 15:35 ` Bruce Richardson 2020-09-04 14:25 ` Ferruh Yigit 2020-09-04 15:14 ` Bruce Richardson 2020-09-04 15:30 ` Bruce Richardson 2020-08-29 7:13 ` [dpdk-dev] [PATCH v3 2/4] app/testpmd: add Rx buffer size display in queue info query Chengchang Tang 2020-08-29 7:13 ` [dpdk-dev] [PATCH v3 3/4] app/procinfo: add Rx buffer size to --show-port Chengchang Tang 2020-08-29 7:13 ` [dpdk-dev] [PATCH v3 4/4] net/hns3: add Rx buffer size to Rx qinfo query Chengchang Tang 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 0/5] add Rx buffer size for rxq info structure Chengchang Tang 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 1/5] ethdev: add a field " Chengchang Tang 2020-09-05 16:50 ` Stephen Hemminger 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 2/5] app/testpmd: add Rx buffer size display in queue info query Chengchang Tang 2020-09-18 8:54 ` Ferruh Yigit 2020-09-20 8:47 ` Chengchang Tang 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 3/5] app/procinfo: add Rx buffer size to --show-port Chengchang Tang 2020-09-05 16:59 ` Stephen Hemminger 2020-09-07 9:14 ` Chengchang Tang 2020-09-18 22:11 ` Stephen Hemminger 2020-09-21 2:06 ` Chengchang Tang 2020-09-21 11:26 ` Ferruh Yigit 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 4/5] net/hns3: add Rx buffer size to Rx qinfo query Chengchang Tang 2020-09-05 9:07 ` [dpdk-dev] [PATCH v4 5/5] doc: remove rxq info structure deprecation notice Chengchang Tang 2020-09-05 16:33 ` Thomas Monjalon 2020-09-07 9:12 ` Chengchang Tang 2020-09-21 13:22 ` [dpdk-dev] [PATCH v5 0/2] add Rx buffer size for rxq info structure Chengchang Tang 2020-09-21 13:22 ` [dpdk-dev] [PATCH v5 1/2] ethdev: add a field " Chengchang Tang 2020-09-21 14:18 ` Ferruh Yigit 2020-09-21 13:22 ` [dpdk-dev] [PATCH v5 2/2] net/hns3: add Rx buffer size to Rx qinfo query Chengchang Tang 2020-09-21 14:19 ` [dpdk-dev] [PATCH v5 0/2] add Rx buffer size for rxq info structure Ferruh Yigit
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