diff options
| author | Govindarajulu Varadarajan <_govind@gmx.com> | 2015-08-15 23:14:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-18 01:25:29 +0300 |
| commit | 373fb0873d4325a7afa04aec29ced0c122d1f8a9 (patch) | |
| tree | b0da4fd30b4dde4e505b3e84339d24a0a85d683f /drivers/net/ethernet/cisco/enic/enic_main.c | |
| parent | fda3f52bdbbe576d78ca9ea84912b48fa51f0e90 (diff) | |
| download | linux-373fb0873d4325a7afa04aec29ced0c122d1f8a9.tar.xz | |
enic: add devcmd2
devcmd is an interface for driver to communicate with fw/adaptor. It
involves writing data to hardware registers and waiting for the result.
This mechanism does not scale well. The queuing of "no wait" devcmds is
done in firmware memory rather than on the host. Firmware memory is a
rather more scarce and valuable resource than host memory. A devcmd storm
from one vf can disrupt the service on other pf/vf. The lack of flow
control allows for possible denial of server from one VM to another.
Devcmd2 uses work queue to post the devcmds, just like tx work queue. This
allows better flow control.
Initialize devcmd2, if fails we fall back to devcmd1.
Also change the driver version.
Signed-off-by: N V V Satyanarayana Reddy <nalreddy@cisco.com>
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/enic_main.c')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 8f646e4e968b..cb1fdc350bb2 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2484,6 +2484,11 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_iounmap; } + err = vnic_devcmd_init(enic->vdev); + + if (err) + goto err_out_vnic_unregister; + #ifdef CONFIG_PCI_IOV /* Get number of subvnics */ pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); |