be2net: re-distribute SRIOV resources allowed by FW
When SR-IOV is enabled in the adapter, the FW distributes resources
evenly across the PF and it's VFs. This is currently done only for some
resources.
This patch adds support for a new cmd that queries the FW for the list
of resources for which the distribution is allowed and distributes them
accordingly.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index c4c3a93..20305e1 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -3408,8 +3408,39 @@
}
#endif
+static u16 be_calculate_vf_qs(struct be_adapter *adapter, u16 num_vfs)
+{
+ struct be_resources res = adapter->pool_res;
+ u16 num_vf_qs = 1;
+
+ /* Distribute the queue resources equally among the PF and it's VFs
+ * Do not distribute queue resources in multi-channel configuration.
+ */
+ if (num_vfs && !be_is_mc(adapter)) {
+ /* If number of VFs requested is 8 less than max supported,
+ * assign 8 queue pairs to the PF and divide the remaining
+ * resources evenly among the VFs
+ */
+ if (num_vfs < (be_max_vfs(adapter) - 8))
+ num_vf_qs = (res.max_rss_qs - 8) / num_vfs;
+ else
+ num_vf_qs = res.max_rss_qs / num_vfs;
+
+ /* Skyhawk-R chip supports only MAX_RSS_IFACES RSS capable
+ * interfaces per port. Provide RSS on VFs, only if number
+ * of VFs requested is less than MAX_RSS_IFACES limit.
+ */
+ if (num_vfs >= MAX_RSS_IFACES)
+ num_vf_qs = 1;
+ }
+ return num_vf_qs;
+}
+
static int be_clear(struct be_adapter *adapter)
{
+ struct pci_dev *pdev = adapter->pdev;
+ u16 num_vf_qs;
+
be_cancel_worker(adapter);
if (sriov_enabled(adapter))
@@ -3418,9 +3449,13 @@
/* Re-configure FW to distribute resources evenly across max-supported
* number of VFs, only when VFs are not already enabled.
*/
- if (be_physfn(adapter) && !pci_vfs_assigned(adapter->pdev))
+ if (be_physfn(adapter) && !pci_vfs_assigned(pdev)) {
+ num_vf_qs = be_calculate_vf_qs(adapter,
+ pci_sriov_get_totalvfs(pdev));
be_cmd_set_sriov_config(adapter, adapter->pool_res,
- pci_sriov_get_totalvfs(adapter->pdev));
+ pci_sriov_get_totalvfs(pdev),
+ num_vf_qs);
+ }
#ifdef CONFIG_BE2NET_VXLAN
be_disable_vxlan_offloads(adapter);
@@ -3469,6 +3504,7 @@
for_all_vfs(adapter, vf_cfg, vf) {
if (!BE3_chip(adapter)) {
status = be_cmd_get_profile_config(adapter, &res,
+ RESOURCE_LIMITS,
vf + 1);
if (!status)
cap_flags = res.if_cap_flags;
@@ -3635,7 +3671,8 @@
/* On a SuperNIC profile, the driver needs to use the
* GET_PROFILE_CONFIG cmd to query the per-function TXQ limits
*/
- be_cmd_get_profile_config(adapter, &super_nic_res, 0);
+ be_cmd_get_profile_config(adapter, &super_nic_res,
+ RESOURCE_LIMITS, 0);
/* Some old versions of BE3 FW don't report max_tx_qs value */
res->max_tx_qs = super_nic_res.max_tx_qs ? : BE3_MAX_TX_QS;
} else {
@@ -3680,7 +3717,7 @@
int max_vfs, old_vfs;
/* Some old versions of BE3 FW don't report max_vfs value */
- be_cmd_get_profile_config(adapter, &res, 0);
+ be_cmd_get_profile_config(adapter, &res, RESOURCE_LIMITS, 0);
if (BE3_chip(adapter) && !res.max_vfs) {
max_vfs = pci_sriov_get_totalvfs(adapter->pdev);
@@ -3769,6 +3806,7 @@
static void be_sriov_config(struct be_adapter *adapter)
{
struct device *dev = &adapter->pdev->dev;
+ u16 num_vf_qs;
int status;
status = be_get_sriov_config(adapter);
@@ -3787,9 +3825,10 @@
* Also, this is done by FW in Lancer chip.
*/
if (be_max_vfs(adapter) && !pci_num_vf(adapter->pdev)) {
+ num_vf_qs = be_calculate_vf_qs(adapter, adapter->num_vfs);
status = be_cmd_set_sriov_config(adapter,
adapter->pool_res,
- adapter->num_vfs);
+ adapter->num_vfs, num_vf_qs);
if (status)
dev_err(dev, "Failed to optimize SR-IOV resources\n");
}