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ixgbe: query assignment of VF queues

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Physical Function assignes Tx/Rx queues to each Virtual Function
according to different schemes[1]. By querying through mailbox,
VF is able to get number of Tx/Rx queues assigned to it.

Note that current Intel ixgbe driver ixgbe-3.18.7 does not fully
support mailbox message IXGBE_VF_GET_QUEUES. The service routine
for IXGBE_VF_GET_QUEUES must be fixed, otherwise PF always return
1 as Tx/Rx queue number.

[1] See section 7.2.1.2.1, 7.1.2.2 and 7.10.2.7.2 of Intel 82599 10
    Gbe Controller Datasheet.

Signed-off-by: Qinglai Xiao <jigsaw@gmail.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
This commit is contained in:
Qinglai Xiao 2013-10-21 17:11:14 +03:00 committed by David Marchand
parent f474e64f4d
commit 27399312ef
1 changed files with 18 additions and 0 deletions
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18
lib/librte_pmd_ixgbe/ixgbe_ethdev.c
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@ -772,6 +772,21 @@ eth_ixgbe_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
return 0;
}
static void ixgbevf_get_queue_num(struct ixgbe_hw *hw)
{
/* Traffic classes are not supported by now */
unsigned int tcs, tc;
/*
* Must let PF know we are at mailbox API version 1.1.
* Otherwise PF won't answer properly.
* In case that PF fails to provide Rx/Tx queue number,
* max_tx_queues and max_rx_queues remain to be 1.
*/
if (!ixgbevf_negotiate_api_version(hw, ixgbe_mbox_api_11))
ixgbevf_get_queues(hw, &tcs, &tc);
}
/*
* Virtual Function device init
*/
@ -840,6 +855,9 @@ eth_ixgbevf_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
return (diag);
}
/* Get Rx/Tx queue count via mailbox, which is ready after reset_hw */
ixgbevf_get_queue_num(hw);
/* Allocate memory for storing MAC addresses */
eth_dev->data->mac_addrs = rte_zmalloc("ixgbevf", ETHER_ADDR_LEN *
hw->mac.num_rar_entries, 0);