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From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Joyce Kong" <joyce.kong@arm.com>, <dev@dpdk.org>
Cc: <nd@arm.com>, <thomas@monjalon.net>, <jerinj@marvell.com>,
	<stephen@networkplumber.org>, <david.marchand@redhat.com>,
	<honnappa.nagarahalli@arm.com>, <gavin.hu@arm.com>,
	<ravi1.kumar@amd.com>, <rmody@marvell.com>,
	<shshaikh@marvell.com>, <xuanziyang2@huawei.com>,
	<cloud.wangxiaoyun@huawei.com>, <zhouguoyang@huawei.com>
Subject: Re: [dpdk-dev] [PATCH v3 1/6] lib/eal: implement the family of rte bitoperation APIs
Date: Mon, 18 Nov 2019 11:52:28 +0100
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35C60C06@smartserver.smartshare.dk> (raw)
In-Reply-To: <1574071619-10407-2-git-send-email-joyce.kong@arm.com>

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Joyce Kong
> Sent: Monday, November 18, 2019 11:07 AM
> 

[snip]

> +++ b/lib/librte_eal/common/include/rte_bitops.h
> @@ -0,0 +1,474 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2019 Arm Limited
> + */
> +
> +#ifndef _RTE_BITOPS_H_
> +#define _RTE_BITOPS_H_
> +
> +/**
> + * @file
> + * Bit Operations
> + *
> + * This file defines a API for bit operations without/with memory
> ordering.
> + */
> +
> +#include <stdint.h>
> +#include <assert.h>
> +#include <rte_compat.h>
> +
> +/*---------------------------- 32 bit operations ---------------------
> -------*/
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change, or be removed, without prior
> notice
> + *
> + * Get the target bit from a 32-bit value without memory ordering.
> + *
> + * @param nr
> + *   The target bit to get.
> + * @param addr
> + *   The address holding the bit.
> + * @return
> + *   The target bit.
> + */
> +__rte_experimental
> +static inline uint32_t
> +rte_get_bit32_relaxed(unsigned int nr, unsigned long *addr)
> +{
> +	assert(nr < 32);
> +
> +	uint32_t mask = 1UL << nr;
> +	return __atomic_load_n(addr, __ATOMIC_RELAXED) & mask;
> +}

Address pointer should be: uint32_t *addr.
Likewise in the other 32 bit functions.

Use RTE_ASSERT() instead of assert().
Likewise in all other functions.

When setting the mask, consider using UINT32_C(1) from <stdint.h> instead of 1UL.

[snip]

> +
> +/*---------------------------- 64 bit operations ---------------------
> -------*/
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change, or be removed, without prior
> notice
> + *
> + * Get the target bit from a 64-bit value without memory ordering.
> + *
> + * @param nr
> + *   The target bit to get.
> + * @param addr
> + *   The address holding the bit.
> + * @return
> + *   The target bit.
> + */
> +__rte_experimental
> +static inline uint64_t
> +rte_get_bit64_relaxed(unsigned int nr, unsigned long *addr)
> +{
> +	assert(nr < 64);
> +
> +	uint64_t mask = 1UL << nr;
> +	return __atomic_load_n(addr, __ATOMIC_RELAXED) & mask;
> +}

Address pointer should be: uint64_t *addr.
Likewise in the other 64 bit functions.

Mask should be 1ULL, not 1UL. Or use UINT64_C(1) from <stdint.h> instead.
Likewise in the other 64 bit functions.

[snip]


Med venlig hilsen / kind regards
- Morten Brørup




  reply index

Thread overview: 92+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-15  7:49 [dpdk-dev] [PATCH v1 0/5] implement common rte bit operation APIs in PMDs Joyce Kong
2019-10-15  7:49 ` [dpdk-dev] [PATCH v1 1/5] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-10-15 16:53   ` Stephen Hemminger
2019-10-18  9:00     ` Joyce Kong (Arm Technology China)
2019-10-16  7:54   ` Jerin Jacob
2019-10-18  9:02     ` Joyce Kong (Arm Technology China)
2019-10-23  3:12       ` Joyce Kong (Arm Technology China)
2019-10-16 19:05   ` Stephen Hemminger
2019-10-17 13:32   ` [dpdk-dev] [PATCH v1 1/5] lib/eal: implement the family of rte bitoperation APIs Morten Brørup
2019-10-18  8:58     ` Joyce Kong (Arm Technology China)
2019-10-23  3:07       ` Joyce Kong (Arm Technology China)
2019-10-23  7:45         ` Morten Brørup
2019-10-23 17:30           ` Honnappa Nagarahalli
2019-10-24  3:38             ` Gavin Hu (Arm Technology China)
2019-11-01 13:48               ` Honnappa Nagarahalli
2019-11-03 15:45                 ` Gavin Hu (Arm Technology China)
2019-10-15  7:49 ` [dpdk-dev] [PATCH v1 2/5] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-10-15  7:49 ` [dpdk-dev] [PATCH v1 3/5] net/bnx2x: " Joyce Kong
2019-10-15  7:50 ` [dpdk-dev] [PATCH v1 4/5] net/hinic: " Joyce Kong
2019-10-15  7:50 ` [dpdk-dev] [PATCH v1 5/5] net/qede: " Joyce Kong
2019-10-15 16:51 ` [dpdk-dev] [PATCH v1 0/5] implement common rte bit operation APIs in PMDs Stephen Hemminger
2019-10-18  9:01   ` Joyce Kong (Arm Technology China)
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 0/6] " Joyce Kong
2019-10-25 13:14   ` David Marchand
2019-10-29 16:42   ` Thomas Monjalon
2019-10-30  9:55     ` Gavin Hu (Arm Technology China)
2019-10-30 10:17       ` Thomas Monjalon
2019-10-30 12:32       ` Jerin Jacob
2019-10-30 13:02         ` Morten Brørup
2019-10-31 10:39           ` Gavin Hu (Arm Technology China)
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-10-23  3:09   ` Honnappa Nagarahalli
2019-10-23  4:56   ` Jerin Jacob
2019-10-23  7:46   ` Morten Brørup
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 2/6] test/iobitops: add io bit operation test case Joyce Kong
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-10-23  3:16   ` Honnappa Nagarahalli
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 4/6] net/bnx2x: " Joyce Kong
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 5/6] net/hinic: " Joyce Kong
2019-10-23  2:54 ` [dpdk-dev] [PATCH v2 6/6] net/qede: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-18 10:52   ` Morten Brørup [this message]
2019-11-19  9:22     ` [dpdk-dev] [PATCH v3 1/6] lib/eal: implement the family of rte bitoperation APIs Joyce Kong (Arm Technology China)
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 4/6] net/bnx2x: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 5/6] net/qede: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 6/6] net/hinic: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-20 13:40   ` [dpdk-dev] [PATCH v4 1/6] lib/eal: implement the family of rte bitoperation APIs Morten Brørup
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 4/6] net/bnx2x: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 5/6] net/qede: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 6/6] net/hinic: " Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-12-02  6:09   ` Gavin Hu (Arm Technology China)
2019-12-02  9:12     ` Thomas Monjalon
2019-12-02  9:24       ` [dpdk-dev] [PATCH v5 3/6] net/axgbe: use common rte bitoperation " Morten Brørup
2019-12-02  9:30         ` Thomas Monjalon
2019-12-02 16:53         ` Stephen Hemminger
2019-12-03  6:52           ` Gavin Hu (Arm Technology China)
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 4/6] net/bnx2x: use common rte bit operation " Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 5/6] net/qede: " Joyce Kong
2019-11-28  6:44 ` [dpdk-dev] [PATCH v5 6/6] net/hinic: " Joyce Kong
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-12-18  6:55   ` Gavin Hu
2020-01-17 13:03   ` David Marchand
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-12-20  6:52   ` Honnappa Nagarahalli
2019-12-21 16:07     ` Honnappa Nagarahalli
2019-12-21 18:07       ` Stephen Hemminger
2019-12-23  5:04         ` Honnappa Nagarahalli
2019-12-23 16:36           ` Stephen Hemminger
2019-12-30  3:02             ` Gavin Hu
2020-01-07  0:44               ` Honnappa Nagarahalli
2020-01-07  1:26                 ` Stephen Hemminger
2020-01-07  4:41                   ` Honnappa Nagarahalli
2020-01-07  0:41             ` Honnappa Nagarahalli
2019-12-21 18:08       ` Stephen Hemminger
2019-12-23  5:45         ` Honnappa Nagarahalli
2019-12-23  8:59       ` Jerin Jacob
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 2/6] test/bitops: add bit operation test case Joyce Kong
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 4/6] net/bnx2x: " Joyce Kong
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 5/6] net/qede: " Joyce Kong
2019-12-18  6:00 ` [dpdk-dev] [PATCH v6 6/6] net/hinic: " Joyce Kong

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