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Commit ad1431e2 authored by Vlad Zolotarov's avatar Vlad Zolotarov Committed by Jeff Kirsher
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ixgbevf: Add RSS Key query code 



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: default avatarVlad Zolotarov <vladz@cloudius-systems.com>
Tested-by: default avatarPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 3c0841a9

drivers/net/ethernet/intel/ixgbevf/ixgbevf.h

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/intel/ixgbevf/mbx.h

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/intel/ixgbevf/vf.c

+54 −0
Original line number Diff line number Diff line
@@ -325,6 +325,60 @@ int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues) 
	return 0;

}



/**

 * 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

drivers/net/ethernet/intel/ixgbevf/vf.h

+1 −0
Original line number Diff line number Diff line
@@ -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__ */