From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: davem@davemloft.net
Cc: Jacob Keller <jacob.e.keller@intel.com>,
netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com,
jogreene@redhat.com, Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Subject: [net-next 04/14] i40e/i40evf: fix incorrect default ITR values on driver load
Date: Mon, 9 Oct 2017 15:38:31 -0700 [thread overview]
Message-ID: <20171009223841.2557-5-jeffrey.t.kirsher@intel.com> (raw)
In-Reply-To: <20171009223841.2557-1-jeffrey.t.kirsher@intel.com>
From: Jacob Keller <jacob.e.keller@intel.com>
The ITR register expects to be programmed in units of 2 microseconds.
Because of this, all of the drivers I40E_ITR_* constants are in terms of
this 2 microsecond register.
Unfortunately, the rx_itr_default value is expected to be programmed in
microseconds.
Effectively the driver defaults to an ITR value of half the expected
value (in terms of minimum microseconds between interrupts).
Fix this by changing the default values to be calculated using
ITR_REG_TO_USEC macro which indicates that we're converting from the
register units into microseconds.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++--
drivers/net/ethernet/intel/i40e/i40e_txrx.h | 6 ++++--
drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 6 ++++--
drivers/net/ethernet/intel/i40evf/i40evf_main.c | 4 ++--
4 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 60b11fdeca2d..d4b0cc36afb1 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8983,8 +8983,8 @@ static int i40e_sw_init(struct i40e_pf *pf)
I40E_FLAG_MSIX_ENABLED;
/* Set default ITR */
- pf->rx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF;
- pf->tx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF;
+ pf->rx_itr_default = I40E_ITR_RX_DEF;
+ pf->tx_itr_default = I40E_ITR_TX_DEF;
/* Depending on PF configurations, it is possible that the RSS
* maximum might end up larger than the available queues
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index a4e3e665a1a1..c3156aa3f709 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -38,8 +38,10 @@
#define I40E_ITR_8K 0x003E
#define I40E_ITR_4K 0x007A
#define I40E_MAX_INTRL 0x3B /* reg uses 4 usec resolution */
-#define I40E_ITR_RX_DEF I40E_ITR_20K
-#define I40E_ITR_TX_DEF I40E_ITR_20K
+#define I40E_ITR_RX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \
+ I40E_ITR_DYNAMIC)
+#define I40E_ITR_TX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \
+ I40E_ITR_DYNAMIC)
#define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */
#define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */
#define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
index d8ca802a71a9..8f9830d7649a 100644
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
@@ -38,8 +38,10 @@
#define I40E_ITR_8K 0x003E
#define I40E_ITR_4K 0x007A
#define I40E_MAX_INTRL 0x3B /* reg uses 4 usec resolution */
-#define I40E_ITR_RX_DEF I40E_ITR_20K
-#define I40E_ITR_TX_DEF I40E_ITR_20K
+#define I40E_ITR_RX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \
+ I40E_ITR_DYNAMIC)
+#define I40E_ITR_TX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \
+ I40E_ITR_DYNAMIC)
#define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */
#define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */
#define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index f62d9565c7b5..5bcbd46e2f6c 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1223,7 +1223,7 @@ static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
tx_ring->netdev = adapter->netdev;
tx_ring->dev = &adapter->pdev->dev;
tx_ring->count = adapter->tx_desc_count;
- tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
+ tx_ring->tx_itr_setting = I40E_ITR_TX_DEF;
if (adapter->flags & I40EVF_FLAG_WB_ON_ITR_CAPABLE)
tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
@@ -1232,7 +1232,7 @@ static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
rx_ring->netdev = adapter->netdev;
rx_ring->dev = &adapter->pdev->dev;
rx_ring->count = adapter->rx_desc_count;
- rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
+ rx_ring->rx_itr_setting = I40E_ITR_RX_DEF;
}
adapter->num_active_queues = num_active_queues;
--
2.14.2
next prev parent reply other threads:[~2017-10-09 22:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-09 22:38 [net-next 00/14][pull request] 40GbE Intel Wired LAN Driver Updates 2017-10-09 Jeff Kirsher
2017-10-09 22:38 ` [net-next 01/14] i40e: fix flags declaration Jeff Kirsher
2017-10-09 22:38 ` [net-next 02/14] i40e: use the safe hash table iterator when deleting mac filters Jeff Kirsher
2017-10-09 22:38 ` [net-next 03/14] i40evf: fix mac filter removal timing issue Jeff Kirsher
2017-10-09 22:38 ` Jeff Kirsher [this message]
2017-10-09 22:38 ` [net-next 05/14] i40e/i40evf: always set the CLEARPBA flag when re-enabling interrupts Jeff Kirsher
2017-10-10 13:07 ` David Laight
2017-10-09 22:38 ` [net-next 06/14] i40e: reduce lrxqthresh from 2 to 1 Jeff Kirsher
2017-10-09 22:38 ` [net-next 07/14] i40e/i40evf: bump tail only in multiples of 8 Jeff Kirsher
2017-10-09 22:38 ` [net-next 08/14] i40e/i40evf: bundle more descriptors when allocating buffers Jeff Kirsher
2017-10-09 22:38 ` [net-next 09/14] i40e: allow XPS with QoS enabled Jeff Kirsher
2017-10-09 22:38 ` [net-next 10/14] i40e: add check for return from find_first_bit call Jeff Kirsher
2017-10-09 22:38 ` [net-next 11/14] i40e: Retry AQC GetPhyAbilities to overcome I2CRead hangs Jeff Kirsher
2017-10-09 22:38 ` [net-next 12/14] i40e: use a local variable instead of calculating multiple times Jeff Kirsher
2017-10-09 22:38 ` [net-next 13/14] i40e: fix a typo Jeff Kirsher
2017-10-09 22:38 ` [net-next 14/14] i40e: Avoid some useless variables and initializers in NVM functions Jeff Kirsher
2017-10-10 1:12 ` [net-next 00/14][pull request] 40GbE Intel Wired LAN Driver Updates 2017-10-09 David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171009223841.2557-5-jeffrey.t.kirsher@intel.com \
--to=jeffrey.t.kirsher@intel.com \
--cc=davem@davemloft.net \
--cc=jacob.e.keller@intel.com \
--cc=jogreene@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=nhorman@redhat.com \
--cc=sassmann@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox