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Date: Wed, 11 Jul 2012 02:09:29 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Alexander Duyck <alexander.h.duyck@...el.com>,
netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 5/5] ixgbe: Merge RSS and flow director ring register caching and configuration
From: Alexander Duyck <alexander.h.duyck@...el.com>
There are really only 3 modes that can control the number of queues. Those
are RSS, DCB, and VMDq/SR-IOV. Currently we have things much more broken
up than they need to be for how we are configuring the rings. In order to
try and straiten some of this out I am going to start merging similar
functionality into single functions. To start with I am merging the Flow
Director ring configuration into the RSS ring configuration since Flow
Director cannot function with DCB or SR-IOV.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c | 98 +++++++-------------------
1 file changed, 24 insertions(+), 74 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
index 47e54e8..83eadd0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
@@ -138,30 +138,6 @@ static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
}
#endif
-/**
- * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
- * @adapter: board private structure to initialize
- *
- * Cache the descriptor ring offsets for Flow Director to the assigned rings.
- *
- **/
-static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
-{
- int i;
- bool ret = false;
-
- if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
- (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
- for (i = 0; i < adapter->num_rx_queues; i++)
- adapter->rx_ring[i]->reg_idx = i;
- for (i = 0; i < adapter->num_tx_queues; i++)
- adapter->tx_ring[i]->reg_idx = i;
- ret = true;
- }
-
- return ret;
-}
-
#ifdef IXGBE_FCOE
/**
* ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
@@ -180,10 +156,7 @@ static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
return false;
if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
- if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
- ixgbe_cache_ring_fdir(adapter);
- else
- ixgbe_cache_ring_rss(adapter);
+ ixgbe_cache_ring_rss(adapter);
fcoe_rx_i = f->offset;
fcoe_tx_i = f->offset;
@@ -244,9 +217,6 @@ static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
return;
#endif /* IXGBE_FCOE */
- if (ixgbe_cache_ring_fdir(adapter))
- return;
-
if (ixgbe_cache_ring_rss(adapter))
return;
}
@@ -272,53 +242,39 @@ static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
* to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
*
**/
-static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
+static bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
{
- bool ret = false;
- struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
+ struct ixgbe_ring_feature *f;
+ u16 rss_i;
- if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
- f->mask = 0xF;
- adapter->num_rx_queues = f->indices;
- adapter->num_tx_queues = f->indices;
- ret = true;
+ if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
+ adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
+ return false;
}
- return ret;
-}
+ /* set mask for 16 queue limit of RSS */
+ f = &adapter->ring_feature[RING_F_RSS];
+ rss_i = f->limit;
-/**
- * ixgbe_set_fdir_queues - Allocate queues for Flow Director
- * @adapter: board private structure to initialize
- *
- * Flow Director is an advanced Rx filter, attempting to get Rx flows back
- * to the original CPU that initiated the Tx session. This runs in addition
- * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
- * Rx load across CPUs using RSS.
- *
- **/
-static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
-{
- bool ret = false;
- struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
-
- f_fdir->indices = min_t(int, num_online_cpus(), f_fdir->limit);
- f_fdir->mask = 0;
+ f->indices = rss_i;
+ f->mask = 0xF;
/*
- * Use RSS in addition to Flow Director to ensure the best
+ * Use Flow Director in addition to RSS to ensure the best
* distribution of flows across cores, even when an FDIR flow
* isn't matched.
*/
- if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
- (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
- adapter->num_tx_queues = f_fdir->indices;
- adapter->num_rx_queues = f_fdir->indices;
- ret = true;
- } else {
- adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
+ if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
+ f = &adapter->ring_feature[RING_F_FDIR];
+
+ f->indices = min_t(u16, num_online_cpus(), f->limit);
+ rss_i = max_t(u16, rss_i, f->indices);
}
- return ret;
+
+ adapter->num_rx_queues = rss_i;
+ adapter->num_tx_queues = rss_i;
+
+ return true;
}
#ifdef IXGBE_FCOE
@@ -343,10 +299,7 @@ static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
e_info(probe, "FCoE enabled with RSS\n");
- if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
- ixgbe_set_fdir_queues(adapter);
- else
- ixgbe_set_rss_queues(adapter);
+ ixgbe_set_rss_queues(adapter);
}
/* adding FCoE rx rings to the end */
@@ -438,9 +391,6 @@ static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
goto done;
#endif /* IXGBE_FCOE */
- if (ixgbe_set_fdir_queues(adapter))
- goto done;
-
if (ixgbe_set_rss_queues(adapter))
goto done;
--
1.7.10.4
--
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