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Date: Wed, 4 Mar 2015 00:44:32 -0500
From: Sathya Perla <sathya.perla@...lex.com>
To: <netdev@...r.kernel.org>
Subject: [PATCH net-next 1/3] be2net: avoid creating the non-RSS default RXQ if FW allows to
From: Vasundhara Volam <vasundhara.volam@...lex.com>
On BE2, BE3 and Skhawk-R chips one non-RSS (called "default") RXQ was
needed to receive non-IP traffic. Some FW versions now export a
capability called IFACE_FLAGS_DEFQ_RSS where this requirement doesn't hold.
On such FWs the driver now does not create the non-RSS default queue.
This prevents wasting one RXQ per VF.
Signed-off-by: Vasundhara Volam <vasundhara.volam@...lex.com>
Signed-off-by: Sathya Perla <sathya.perla@...lex.com>
---
drivers/net/ethernet/emulex/benet/be.h | 5 +--
drivers/net/ethernet/emulex/benet/be_cmds.c | 3 --
drivers/net/ethernet/emulex/benet/be_cmds.h | 5 +--
drivers/net/ethernet/emulex/benet/be_ethtool.c | 2 +-
drivers/net/ethernet/emulex/benet/be_main.c | 50 +++++++++++++++++---------
5 files changed, 41 insertions(+), 24 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index fac806a..7e13fab 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -488,6 +488,8 @@ struct be_adapter {
/* Rx rings */
u16 num_rx_qs;
+ u16 num_rss_qs;
+ u16 need_def_rxq;
struct be_rx_obj rx_obj[MAX_RX_QS];
u32 big_page_size; /* Compounded page size shared by rx wrbs */
@@ -635,9 +637,8 @@ extern const struct ethtool_ops be_ethtool_ops;
for (i = 0, rxo = &adapter->rx_obj[i]; i < adapter->num_rx_qs; \
i++, rxo++)
-/* Skip the default non-rss queue (last one)*/
#define for_all_rss_queues(adapter, rxo, i) \
- for (i = 0, rxo = &adapter->rx_obj[i]; i < (adapter->num_rx_qs - 1);\
+ for (i = 0, rxo = &adapter->rx_obj[i]; i < adapter->num_rss_qs; \
i++, rxo++)
#define for_all_tx_queues(adapter, txo, i) \
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index f6db7b3..43dea7a 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -3580,9 +3580,6 @@ static void be_copy_nic_desc(struct be_resources *res,
/* Clear flags that driver is not interested in */
res->if_cap_flags = le32_to_cpu(desc->cap_flags) &
BE_IF_CAP_FLAGS_WANT;
- /* Need 1 RXQ as the default RXQ */
- if (res->max_rss_qs && res->max_rss_qs == res->max_rx_qs)
- res->max_rss_qs -= 1;
}
/* Uses Mbox */
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index db761e8e..4951482 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -588,14 +588,15 @@ enum be_if_flags {
BE_IF_FLAGS_MCAST_PROMISCUOUS = 0x200,
BE_IF_FLAGS_PASS_L2_ERRORS = 0x400,
BE_IF_FLAGS_PASS_L3L4_ERRORS = 0x800,
- BE_IF_FLAGS_MULTICAST = 0x1000
+ BE_IF_FLAGS_MULTICAST = 0x1000,
+ BE_IF_FLAGS_DEFQ_RSS = 0x1000000
};
#define BE_IF_CAP_FLAGS_WANT (BE_IF_FLAGS_RSS | BE_IF_FLAGS_PROMISCUOUS |\
BE_IF_FLAGS_BROADCAST | BE_IF_FLAGS_VLAN_PROMISCUOUS |\
BE_IF_FLAGS_VLAN | BE_IF_FLAGS_MCAST_PROMISCUOUS |\
BE_IF_FLAGS_PASS_L3L4_ERRORS | BE_IF_FLAGS_MULTICAST |\
- BE_IF_FLAGS_UNTAGGED)
+ BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_DEFQ_RSS)
#define BE_IF_FLAGS_ALL_PROMISCUOUS (BE_IF_FLAGS_PROMISCUOUS | \
BE_IF_FLAGS_VLAN_PROMISCUOUS |\
diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index 4d2de47..b765c24 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -1097,7 +1097,7 @@ static int be_set_rss_hash_opts(struct be_adapter *adapter,
return status;
if (be_multi_rxq(adapter)) {
- for (j = 0; j < 128; j += adapter->num_rx_qs - 1) {
+ for (j = 0; j < 128; j += adapter->num_rss_qs) {
for_all_rss_queues(adapter, rxo, i) {
if ((j + i) >= 128)
break;
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index b2277a4..6121a04 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2454,13 +2454,19 @@ static int be_rx_cqs_create(struct be_adapter *adapter)
int rc, i;
/* We can create as many RSS rings as there are EQs. */
- adapter->num_rx_qs = adapter->num_evt_qs;
+ adapter->num_rss_qs = adapter->num_evt_qs;
- /* We'll use RSS only if atleast 2 RSS rings are supported.
- * When RSS is used, we'll need a default RXQ for non-IP traffic.
+ /* We'll use RSS only if atleast 2 RSS rings are supported. */
+ if (adapter->num_rss_qs <= 1)
+ adapter->num_rss_qs = 0;
+
+ adapter->num_rx_qs = adapter->num_rss_qs + adapter->need_def_rxq;
+
+ /* When the interface is not capable of RSS rings (and there is no
+ * need to create a default RXQ) we'll still need one RXQ
*/
- if (adapter->num_rx_qs > 1)
- adapter->num_rx_qs++;
+ if (adapter->num_rx_qs == 0)
+ adapter->num_rx_qs = 1;
adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE;
for_all_rx_queues(adapter, rxo, i) {
@@ -2479,8 +2485,7 @@ static int be_rx_cqs_create(struct be_adapter *adapter)
}
dev_info(&adapter->pdev->dev,
- "created %d RSS queue(s) and 1 default RX queue\n",
- adapter->num_rx_qs - 1);
+ "created %d RX queue(s)\n", adapter->num_rx_qs);
return 0;
}
@@ -3110,12 +3115,14 @@ static int be_rx_qs_create(struct be_adapter *adapter)
return rc;
}
- /* The FW would like the default RXQ to be created first */
- rxo = default_rxo(adapter);
- rc = be_cmd_rxq_create(adapter, &rxo->q, rxo->cq.id, rx_frag_size,
- adapter->if_handle, false, &rxo->rss_id);
- if (rc)
- return rc;
+ if (adapter->need_def_rxq || !adapter->num_rss_qs) {
+ rxo = default_rxo(adapter);
+ rc = be_cmd_rxq_create(adapter, &rxo->q, rxo->cq.id,
+ rx_frag_size, adapter->if_handle,
+ false, &rxo->rss_id);
+ if (rc)
+ return rc;
+ }
for_all_rss_queues(adapter, rxo, i) {
rc = be_cmd_rxq_create(adapter, &rxo->q, rxo->cq.id,
@@ -3126,8 +3133,7 @@ static int be_rx_qs_create(struct be_adapter *adapter)
}
if (be_multi_rxq(adapter)) {
- for (j = 0; j < RSS_INDIR_TABLE_LEN;
- j += adapter->num_rx_qs - 1) {
+ for (j = 0; j < RSS_INDIR_TABLE_LEN; j += adapter->num_rss_qs) {
for_all_rss_queues(adapter, rxo, i) {
if ((j + i) >= RSS_INDIR_TABLE_LEN)
break;
@@ -3439,7 +3445,7 @@ static int be_if_create(struct be_adapter *adapter, u32 *if_handle,
en_flags = BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_BROADCAST |
BE_IF_FLAGS_MULTICAST | BE_IF_FLAGS_PASS_L3L4_ERRORS |
- BE_IF_FLAGS_RSS;
+ BE_IF_FLAGS_RSS | BE_IF_FLAGS_DEFQ_RSS;
en_flags &= cap_flags;
@@ -3649,6 +3655,7 @@ static void BEx_get_resources(struct be_adapter *adapter,
res->max_evt_qs = 1;
res->if_cap_flags = BE_IF_CAP_FLAGS_WANT;
+ res->if_cap_flags &= ~BE_IF_FLAGS_DEFQ_RSS;
if (!(adapter->function_caps & BE_FUNCTION_CAPS_RSS))
res->if_cap_flags &= ~BE_IF_FLAGS_RSS;
}
@@ -3731,12 +3738,23 @@ static int be_get_resources(struct be_adapter *adapter)
if (status)
return status;
+ /* If a deafault RXQ must be created, we'll use up one RSSQ*/
+ if (res.max_rss_qs && res.max_rss_qs == res.max_rx_qs &&
+ !(res.if_cap_flags & BE_IF_FLAGS_DEFQ_RSS))
+ res.max_rss_qs -= 1;
+
/* If RoCE may be enabled stash away half the EQs for RoCE */
if (be_roce_supported(adapter))
res.max_evt_qs /= 2;
adapter->res = res;
}
+ /* If FW supports RSS default queue, then skip creating non-RSS
+ * queue for non-IP traffic.
+ */
+ adapter->need_def_rxq = (be_if_cap_flags(adapter) &
+ BE_IF_FLAGS_DEFQ_RSS) ? 0 : 1;
+
dev_info(dev, "Max: txqs %d, rxqs %d, rss %d, eqs %d, vfs %d\n",
be_max_txqs(adapter), be_max_rxqs(adapter),
be_max_rss(adapter), be_max_eqs(adapter),
--
2.2.0
--
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