From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vlad Zolotarov Subject: [PATCH net-next v5 6/7] ixgbevf: Add RSS Key query code Date: Wed, 7 Jan 2015 21:26:41 +0200 Message-ID: <1420658802-18061-7-git-send-email-vladz@cloudius-systems.com> References: <1420658802-18061-1-git-send-email-vladz@cloudius-systems.com> Cc: gleb@cloudius-systems.com, avi@cloudius-systems.com, jeffrey.t.kirsher@intel.com, Vlad Zolotarov To: netdev@vger.kernel.org Return-path: Received: from mail-we0-f178.google.com ([74.125.82.178]:34894 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753608AbbAGT1E (ORCPT ); Wed, 7 Jan 2015 14:27:04 -0500 Received: by mail-we0-f178.google.com with SMTP id p10so1757176wes.37 for ; Wed, 07 Jan 2015 11:27:03 -0800 (PST) In-Reply-To: <1420658802-18061-1-git-send-email-vladz@cloudius-systems.com> Sender: netdev-owner@vger.kernel.org List-ID: 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. Signed-off-by: Vlad Zolotarov --- 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/mbx.h | 2 ++ drivers/net/ethernet/intel/ixgbevf/vf.c | 44 ++++++++++++++++++++++++++++++++ drivers/net/ethernet/intel/ixgbevf/vf.h | 1 + 3 files changed, 47 insertions(+) diff --git a/drivers/net/ethernet/intel/ixgbevf/mbx.h b/drivers/net/ethernet/intel/ixgbevf/mbx.h index 951a506..f79432e 100644 --- a/drivers/net/ethernet/intel/ixgbevf/mbx.h +++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h @@ -118,6 +118,8 @@ enum ixgbe_pfvf_api_rev { #define IXGBE_VF_RETA_SZ 1 /* Number of RETA DWs to bring */ #define IXGBE_VF_RETA_OFFSET 2 /* Offset in 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 /* word in permanent address message with the current multicast type */ diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c index cb5a4cf..f42a67d 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.c +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -292,6 +292,50 @@ static inline int _ixgbevf_get_reta(struct ixgbe_hw *hw, u32 *msgbuf, } /** + * ixgbevf_get_rss_key - get the RSS Random Key + * @hw: pointer to the HW structure + * @reta: buffer to fill with RETA contents. + * + * The "rss_key" buffer should be big enough to contain 10 registers. + * + * Returns: 0 on success. + * if API doesn't support this operation - (-EPERM). + */ +int ixgbevf_get_rss_key(struct ixgbe_hw *hw, u8 *rss_key) +{ + int err; + u32 msgbuf[IXGBE_VFMAILBOX_SIZE]; + + /* Return and error if API doesn't support RSS Random Key retrieval */ + if (hw->api_version != ixgbe_mbox_api_12) + return -EPERM; + + 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 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, 40); + + return 0; +} + +/** * ixgbevf_get_reta - get the RSS redirection table (RETA) contents. * @hw: pointer to the HW structure * @reta: buffer to fill with RETA contents. diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h index 73c1b33..54f53f2b8 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.h +++ b/drivers/net/ethernet/intel/ixgbevf/vf.h @@ -209,5 +209,6 @@ 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(struct ixgbe_hw *hw, u32 *reta); +int ixgbevf_get_rss_key(struct ixgbe_hw *hw, u8 *rss_key); #endif /* __IXGBE_VF_H__ */ -- 2.1.0