From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 409AC46C0D; Fri, 25 Jul 2025 14:50:48 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 218874065E; Fri, 25 Jul 2025 14:50:15 +0200 (CEST) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) by mails.dpdk.org (Postfix) with ESMTP id 73E26400D5 for ; Fri, 25 Jul 2025 14:50:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1753447811; x=1784983811; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=i7sK58R06PnhYlh9YRQgaqabkNTctfbajraVb9R9w3E=; b=HKqewuBaZppNjYqGYKVYHcNpIC7IgL7+1rDfk3Yc2XwjKyu2oNgxqMj5 vMHr8cG7Dk35kDEJqNLZFXo7nbo7jtYR8/fTe9CNqOhqZ+z68EPUnx4lw 45o9dYttQif5UhN0RR9QtPIpu3Fd95BSjYc68zyLfbm2kkn4l7YHUnlrh yMmIJZ6Bl8dn+WyTH3uRzY44xrBAH1LInoljuHRNcKYh6RBISPpx9h43g U3sUbBL8jLwNyZJYljNoTrnO5qU5udr8kxsXdOgarZTLDdBrHvRjaiSbH n0GkjZSrlsiDgjJNt6iCkmle+kAusX+cWnRUAscYWJeJBRe7bygZ+gAkZ g==; X-CSE-ConnectionGUID: +VtGK21HSbiiIvi0a/NPSg== X-CSE-MsgGUID: gHUWNOmUQHKs53bOb3RiuA== X-IronPort-AV: E=McAfee;i="6800,10657,11503"; a="66480147" X-IronPort-AV: E=Sophos;i="6.16,339,1744095600"; d="scan'208";a="66480147" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2025 05:50:11 -0700 X-CSE-ConnectionGUID: dcynbCy5Rt2jSMDvnW0e6Q== X-CSE-MsgGUID: IJn9yrTVR9irktgaOG3UVg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,339,1744095600"; d="scan'208";a="161152296" Received: from silpixa00401177.ir.intel.com ([10.237.213.77]) by orviesa007.jf.intel.com with ESMTP; 25 Jul 2025 05:50:10 -0700 From: Ciara Loftus To: dev@dpdk.org Cc: Bruce Richardson , Ciara Loftus Subject: [RFC PATCH 05/14] net/intel: introduce common vector capability function Date: Fri, 25 Jul 2025 12:49:10 +0000 Message-Id: <20250725124919.3564890-6-ciara.loftus@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250725124919.3564890-1-ciara.loftus@intel.com> References: <20250725124919.3564890-1-ciara.loftus@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org From: Bruce Richardson A common need within the drivers is to select between SSE, AVX2 and AVX-512 code paths. Provide a common function which helps with this decision making, that returns the max simd bandwidth based on any user configured maximums and available CPU flags. Signed-off-by: Bruce Richardson Signed-off-by: Ciara Loftus --- drivers/net/intel/common/rx_vec_x86.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/net/intel/common/rx_vec_x86.h b/drivers/net/intel/common/rx_vec_x86.h index 3d7343b1ff..314fa24b41 100644 --- a/drivers/net/intel/common/rx_vec_x86.h +++ b/drivers/net/intel/common/rx_vec_x86.h @@ -346,4 +346,27 @@ ci_rxq_rearm(struct ci_rx_queue *rxq, const enum ci_rx_vec_level vec_level) rte_write32_wc(rte_cpu_to_le_32(rx_id), rxq->qrx_tail); } +#ifdef CC_AVX512_SUPPORT +#define X86_MAX_SIMD_BITWIDTH (rte_vect_get_max_simd_bitwidth()) +#else +#define X86_MAX_SIMD_BITWIDTH RTE_MIN(256, rte_vect_get_max_simd_bitwidth()) +#endif /* CC_AVX512_SUPPORT */ + +static inline enum rte_vect_max_simd +ci_get_x86_max_simd_bitwidth(void) +{ + int ret = RTE_VECT_SIMD_DISABLED; + int simd = X86_MAX_SIMD_BITWIDTH; + + if (simd >= 512 && rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1 && + rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512BW) == 1) + ret = RTE_VECT_SIMD_512; + else if (simd >= 256 && (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 || + rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1)) + ret = RTE_VECT_SIMD_256; + else if (simd >= 128) + ret = RTE_VECT_SIMD_128; + return ret; +} + #endif /* _COMMON_INTEL_RX_VEC_X86_H_ */ -- 2.34.1