From patchwork Mon Mar 30 18:35:28 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vlad Zolotarov X-Patchwork-Id: 456297 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id E3864140187 for ; Tue, 31 Mar 2015 05:35:58 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753454AbbC3Sfy (ORCPT ); Mon, 30 Mar 2015 14:35:54 -0400 Received: from mail-wi0-f178.google.com ([209.85.212.178]:38086 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753419AbbC3Sfr (ORCPT ); Mon, 30 Mar 2015 14:35:47 -0400 Received: by wibgn9 with SMTP id gn9so142223870wib.1 for ; Mon, 30 Mar 2015 11:35:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=IeI+sWjEGIH0sIOtVn3WdH0ZIsDrn+s2UVrcbxc+dhI=; b=NS0po7GY0hoIWbIYrSoUjNWeR0IczSEVNvksts+tDmRfxjTCATvk8Kb2DOXFkc1y5+ jnVDq1qmlxJKaRMLS0hCCrZGGrmeMBxXhYx2wAHbDpPbVGcmLZQQgpo7J3dZdvQ5a0I6 oyp34XAobwUS2RC7khciNOlt7Wt/+Nd1gn/QEInKuA25kO3RPllwsFf/4Gz91irFXNav Wn07XdKJa0QTt3Uw8MqVRd5r3FqTHTeyuXJnVkLIuqKcUqTwTHfXCQ/UNpYBKpJBhYVG cyteoe187kUbjIDR7b8feprWlDJ1dzXtk/FjwVsoPKZHZDebFMHLbr6IngRZi53IhFcl ld6Q== X-Gm-Message-State: ALoCoQn/gfplKc19XXDgGUvWqiqaNKL/ynSdXOcqsl7WmGO6de1ZEi1QlrQRi341FabxovOPLgzr X-Received: by 10.180.80.164 with SMTP id s4mr24520503wix.78.1427740545582; Mon, 30 Mar 2015 11:35:45 -0700 (PDT) Received: from vladz-laptop.localdomain ([109.65.117.109]) by mx.google.com with ESMTPSA id gd6sm17450407wib.17.2015.03.30.11.35.43 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Mar 2015 11:35:44 -0700 (PDT) From: Vlad Zolotarov To: netdev@vger.kernel.org Cc: jeffrey.t.kirsher@intel.com, intel-wired-lan@lists.osuosl.org, avi@cloudius-systems.com, gleb@cloudius-systems.com, Vlad Zolotarov Subject: [PATCH net-next v10 6/7] ixgbevf: Add RSS Key query code Date: Mon, 30 Mar 2015 21:35:28 +0300 Message-Id: <1427740529-9605-7-git-send-email-vladz@cloudius-systems.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1427740529-9605-1-git-send-email-vladz@cloudius-systems.com> References: <1427740529-9605-1-git-send-email-vladz@cloudius-systems.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add the ixgbevf_get_rss_key() function that queries the PF for an RSS Random Key using a new VF-PF channel IXGBE_VF_GET_RSS_KEY command. This patch adds the support for 82599 and x540 devices only. Support for other devices will be added later. Signed-off-by: Vlad Zolotarov --- New in v10: - Expose the _locked function in the vf.h interface according to the current ixgbevf layering model. - Return EOPNOTSUPP in cases then operation is not supported. New in v9: - Reduce the support to 82599 and x540 devices only. - Added IXGBEVF_RSS_HASH_KEY_SIZE macro. New in v8: - Protect a mailbox access. New in v6: - Return a proper return code when an operation is blocked by PF. New in v2: - Added a more detailed patch description. New in v1 (compared to RFC): - Use "if-else" statement instead of a "switch-case" for a single option case (in ixgbevf_get_rss_key()). --- drivers/net/ethernet/intel/ixgbevf/ixgbevf.h | 1 + drivers/net/ethernet/intel/ixgbevf/mbx.h | 1 + drivers/net/ethernet/intel/ixgbevf/vf.c | 54 ++++++++++++++++++++++++++++ drivers/net/ethernet/intel/ixgbevf/vf.h | 1 + 4 files changed, 57 insertions(+) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h index f317f77..31089a1 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h @@ -146,6 +146,7 @@ struct ixgbevf_ring { #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES #define IXGBEVF_MAX_RSS_QUEUES 2 #define IXGBEVF_82599_RETA_SIZE 128 +#define IXGBEVF_RSS_HASH_KEY_SIZE 40 #define IXGBEVF_DEFAULT_TXD 1024 #define IXGBEVF_DEFAULT_RXD 512 diff --git a/drivers/net/ethernet/intel/ixgbevf/mbx.h b/drivers/net/ethernet/intel/ixgbevf/mbx.h index 66e138b..82f44e0 100644 --- a/drivers/net/ethernet/intel/ixgbevf/mbx.h +++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h @@ -110,6 +110,7 @@ enum ixgbe_pfvf_api_rev { /* mailbox API, version 1.2 VF requests */ #define IXGBE_VF_GET_RETA 0x0a /* VF request for RETA */ +#define IXGBE_VF_GET_RSS_KEY 0x0b /* get RSS hash key */ /* length of permanent address message returned from PF */ #define IXGBE_VF_PERMADDR_MSG_LEN 4 diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c index 7e43f88..d1339b0 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.c +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -326,6 +326,60 @@ int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues) } /** + * ixgbevf_get_rss_key_locked - get the RSS Random Key + * @hw: pointer to the HW structure + * @rss_key: buffer to fill with RSS Hash Key contents. + * + * The "rss_key" buffer should be big enough to contain 10 registers. + * + * Returns: 0 on success. + * if API doesn't support this operation - (-EOPNOTSUPP). + */ +int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key) +{ + int err; + u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; + + /* We currently support the RSS Random Key retrieval for 82599 and x540 + * devices only. + * + * Thus return an error if API doesn't support RSS Random Key retrieval + * or if the operation is not supported for this device type. + */ + if (hw->api_version != ixgbe_mbox_api_12 || + hw->mac.type >= ixgbe_mac_X550_vf) + return -EOPNOTSUPP; + + msgbuf[0] = IXGBE_VF_GET_RSS_KEY; + err = hw->mbx.ops.write_posted(hw, msgbuf, 1); + + if (err) + return err; + + err = hw->mbx.ops.read_posted(hw, msgbuf, 11); + + if (err) + return err; + + msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS; + + /* If the operation has been refused by a PF return -EPERM */ + if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK)) + return -EPERM; + + /* If we didn't get an ACK there must have been + * some sort of mailbox error so we should treat it + * as such. + */ + if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK)) + return IXGBE_ERR_MBX; + + memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE); + + return 0; +} + +/** * ixgbevf_set_rar_vf - set device MAC address * @hw: pointer to hardware structure * @index: Receive address register to write diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h index e17f9eb..d40f036 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.h +++ b/drivers/net/ethernet/intel/ixgbevf/vf.h @@ -211,4 +211,5 @@ int ixgbevf_negotiate_api_version(struct ixgbe_hw *hw, int api); int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs, unsigned int *default_tc); int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues); +int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key); #endif /* __IXGBE_VF_H__ */