From: Coiby Xu <coiby.xu@gmail.com>
To: linux-staging@lists.linux.dev
Cc: netdev@vger.kernel.org,
Benjamin Poirier <benjamin.poirier@gmail.com>,
Shung-Hsi Yu <shung-hsi.yu@suse.com>,
Manish Chopra <manishc@marvell.com>,
GR-Linux-NIC-Dev@marvell.com (supporter:QLOGIC QLGE 10Gb
ETHERNET DRIVER), Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org (open list)
Subject: [RFC 06/19] staging: qlge: disable flow control by default
Date: Mon, 21 Jun 2021 21:48:49 +0800 [thread overview]
Message-ID: <20210621134902.83587-7-coiby.xu@gmail.com> (raw)
In-Reply-To: <20210621134902.83587-1-coiby.xu@gmail.com>
According to the TODO item,
> * the flow control implementation in firmware is buggy (sends a flood of pause
> frames, resets the link, device and driver buffer queues become
> desynchronized), disable it by default
Currently, qlge_mpi_port_cfg_work calls qlge_mb_get_port_cfg which gets
the link config from the firmware and saves it to qdev->link_config. By
default, flow control is enabled. This commit writes the
save the pause parameter of qdev->link_config and don't let it
overwritten by link settings of current port. Since qdev->link_config=0
when qdev is initialized, this could disable flow control by default and
the pause parameter value could also survive MPI resetting,
$ ethtool -a enp94s0f0
Pause parameters for enp94s0f0:
Autonegotiate: off
RX: off
TX: off
The follow control can be enabled manually,
$ ethtool -A enp94s0f0 rx on tx on
$ ethtool -a enp94s0f0
Pause parameters for enp94s0f0:
Autonegotiate: off
RX: on
TX: on
Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
---
drivers/staging/qlge/TODO | 3 ---
drivers/staging/qlge/qlge_mpi.c | 11 ++++++++++-
2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/qlge/TODO b/drivers/staging/qlge/TODO
index b7a60425fcd2..8c84160b5993 100644
--- a/drivers/staging/qlge/TODO
+++ b/drivers/staging/qlge/TODO
@@ -4,9 +4,6 @@
ql_build_rx_skb(). That function is now used exclusively to handle packets
that underwent header splitting but it still contains code to handle non
split cases.
-* the flow control implementation in firmware is buggy (sends a flood of pause
- frames, resets the link, device and driver buffer queues become
- desynchronized), disable it by default
* some structures are initialized redundantly (ex. memset 0 after
alloc_etherdev())
* the driver has a habit of using runtime checks where compile time checks are
diff --git a/drivers/staging/qlge/qlge_mpi.c b/drivers/staging/qlge/qlge_mpi.c
index 2630ebf50341..0f1c7da80413 100644
--- a/drivers/staging/qlge/qlge_mpi.c
+++ b/drivers/staging/qlge/qlge_mpi.c
@@ -806,6 +806,7 @@ int qlge_mb_get_port_cfg(struct qlge_adapter *qdev)
{
struct mbox_params mbc;
struct mbox_params *mbcp = &mbc;
+ u32 saved_pause_link_config = 0;
int status = 0;
memset(mbcp, 0, sizeof(struct mbox_params));
@@ -826,7 +827,15 @@ int qlge_mb_get_port_cfg(struct qlge_adapter *qdev)
} else {
netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
"Passed Get Port Configuration.\n");
- qdev->link_config = mbcp->mbox_out[1];
+ /*
+ * Don't let the pause parameter be overwritten by
+ *
+ * In this way, follow control can be disabled by default
+ * and the setting could also survive the MPI reset
+ */
+ saved_pause_link_config = qdev->link_config & CFG_PAUSE_STD;
+ qdev->link_config = ~CFG_PAUSE_STD & mbcp->mbox_out[1];
+ qdev->link_config |= saved_pause_link_config;
qdev->max_frame_size = mbcp->mbox_out[2];
}
return status;
--
2.32.0
next prev parent reply other threads:[~2021-06-21 13:50 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210621134902.83587-1-coiby.xu@gmail.com>
2021-06-21 13:48 ` [RFC 01/19] staging: qlge: fix incorrect truesize accounting Coiby Xu
2021-06-21 14:10 ` Dan Carpenter
2021-06-22 11:36 ` Coiby Xu
2021-06-23 4:55 ` Benjamin Poirier
2021-06-24 11:47 ` Coiby Xu
2021-06-28 0:14 ` Coiby Xu
2021-06-21 13:48 ` [RFC 02/19] staging: qlge: change LARGE_BUFFER_MAX_SIZE to 4096 Coiby Xu
2021-06-21 13:48 ` [RFC 03/19] staging: qlge: alloc skb with only enough room for header when data is put in the fragments Coiby Xu
2021-06-21 13:48 ` [RFC 04/19] staging: qlge: add qlge_* prefix to avoid namespace clashes Coiby Xu
2021-06-22 7:55 ` Benjamin Poirier
2021-06-24 11:34 ` Coiby Xu
2021-06-21 13:48 ` [RFC 05/19] staging: qlge: rename rx to completion queue and seperate rx_ring from completion queue Coiby Xu
2021-06-21 13:48 ` Coiby Xu [this message]
2021-06-22 7:49 ` [RFC 06/19] staging: qlge: disable flow control by default Benjamin Poirier
2021-06-24 11:33 ` Coiby Xu
2021-06-21 13:48 ` [RFC 07/19] staging: qlge: remove the TODO item of unnecessary memset 0 Coiby Xu
2021-06-21 13:48 ` [RFC 08/19] staging: qlge: reorder members of qlge_adapter for optimization Coiby Xu
2021-06-21 13:48 ` [RFC 09/19] staging: qlge: remove the TODO item of reorder struct Coiby Xu
2021-06-21 13:48 ` [RFC 10/19] staging: qlge: remove the TODO item of avoid legacy/deprecated apis Coiby Xu
2021-06-21 13:48 ` [RFC 11/19] staging: qlge: the number of pages to contain a buffer queue is constant Coiby Xu
2021-06-21 13:48 ` [RFC 12/19] staging: qlge: rewrite do while loops as for loops in qlge_start_rx_ring Coiby Xu
2021-06-22 7:45 ` Benjamin Poirier
2021-06-24 11:56 ` Coiby Xu
2021-06-21 13:48 ` [RFC 13/19] staging: qlge: rewrite do while loop as for loop in qlge_sem_spinlock Coiby Xu
2021-06-22 7:20 ` Dan Carpenter
2021-06-24 11:22 ` Coiby Xu
2021-06-30 10:58 ` Joe Perches
2021-06-30 23:33 ` Coiby Xu
2021-07-01 4:35 ` Joe Perches
2021-07-02 23:56 ` Coiby Xu
2021-06-21 13:48 ` [RFC 14/19] staging: qlge: rewrite do while loop as for loop in qlge_refill_bq Coiby Xu
2021-06-21 13:48 ` [RFC 15/19] staging: qlge: remove the TODO item about rewriting while loops as simple for loops Coiby Xu
2021-06-21 13:48 ` [RFC 16/19] staging: qlge: remove deadcode in qlge_build_rx_skb Coiby Xu
2021-06-22 7:29 ` Dan Carpenter
2021-06-24 11:25 ` Coiby Xu
2021-06-24 12:49 ` Dan Carpenter
2021-06-27 10:53 ` Coiby Xu
2021-06-28 6:46 ` Dan Carpenter
2021-06-29 13:35 ` Coiby Xu
2021-06-29 14:22 ` Dan Carpenter
2021-06-30 23:19 ` Coiby Xu
2021-06-21 13:49 ` [RFC 17/19] staging: qlge: fix weird line wrapping Coiby Xu
2021-06-22 8:46 ` Dan Carpenter
2021-06-24 11:55 ` Coiby Xu
2021-06-21 13:49 ` [RFC 18/19] staging: qlge: fix two indentation issues Coiby Xu
2021-06-21 13:49 ` [RFC 19/19] staging: qlge: remove TODO item of unnecessary runtime checks Coiby Xu
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