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ixgbevf: Add RSS Key query code

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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 <vladz@cloudius-systems.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Vlad Zolotarov 2015-03-30 21:35:28 +03:00 committed by Jeff Kirsher
parent 3c0841a922
commit ad1431e2db
4 changed files with 57 additions and 0 deletions
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1
drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
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@ -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

1
drivers/net/ethernet/intel/ixgbevf/mbx.h
View File

@ -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

54
drivers/net/ethernet/intel/ixgbevf/vf.c
View File

@ -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

1
drivers/net/ethernet/intel/ixgbevf/vf.h
View File

@ -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__ */