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Date: Wed, 31 Dec 2014 11:51:58 +0200 From: Vlad Zolotarov <vladz@...udius-systems.com> To: netdev@...r.kernel.org Cc: gleb@...udius-systems.com, avi@...udius-systems.com, jeffrey.t.kirsher@...el.com, Vlad Zolotarov <vladz@...udius-systems.com> Subject: [PATCH net-next v1 4/5] ixgbevf: Add RSS Key query code Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com> --- 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 3e148a8..9674ac8 100644 --- a/drivers/net/ethernet/intel/ixgbevf/mbx.h +++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h @@ -110,6 +110,8 @@ enum ixgbe_pfvf_api_rev { #define IXGBE_VF_GET_RETA_1 0x0b /* get RETA[12..23] */ #define IXGBE_VF_GET_RETA_2 0x0c /* get RETA[24..31] */ +#define IXGBE_VF_GET_RSS_KEY 0x0d /* get RSS hash key */ + /* GET_QUEUES return data indices within the mailbox */ #define IXGBE_VF_TX_QUEUES 1 /* number of Tx queues supported */ #define IXGBE_VF_RX_QUEUES 2 /* number of Rx queues supported */ diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c index 8b98cdf..dbac264 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.c +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -290,6 +290,50 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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