From: Wesley Sheng <wesley.sheng@microchip.com>
To: <kurt.schwemmer@microsemi.com>, <logang@deltatee.com>,
<jdmason@kudzu.us>, <dave.jiang@intel.com>, <allenbh@gmail.com>,
<linux-pci@vger.kernel.org>, <linux-ntb@googlegroups.com>,
<linux-kernel@vger.kernel.org>
Cc: <wesleyshenggit@sina.com>, <wesley.sheng@microchip.com>,
<kelvin.cao@microchip.com>
Subject: [PATCH 2/3] ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case
Date: Mon, 22 Apr 2019 22:42:57 +0800 [thread overview]
Message-ID: <1555944178-1957-3-git-send-email-wesley.sheng@microchip.com> (raw)
In-Reply-To: <1555944178-1957-1-git-send-email-wesley.sheng@microchip.com>
In case of NTB crosslink topology, the setting of shared memory window in
the virtual partition doesn't reset on peer's reboot. So skip the
unnecessary re-setup of shared memory window for that case.
Signed-off-by: Wesley Sheng <wesley.sheng@microchip.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
---
drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
index 947ed0b..6cf15c18 100644
--- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
+++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
@@ -1459,6 +1459,9 @@ static int switchtec_ntb_reinit_peer(struct switchtec_ntb *sndev)
{
int rc;
+ if (crosslink_is_enabled(sndev))
+ return 0;
+
dev_info(&sndev->stdev->dev, "reinitialize shared memory window\n");
rc = config_rsvd_lut_win(sndev, sndev->mmio_peer_ctrl, 0,
sndev->self_partition,
--
2.7.4
next prev parent reply other threads:[~2019-04-22 6:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-22 14:42 [PATCH 0/3] Redundant steps removal and bug fix of ntb_hw_switchtec Wesley Sheng
2019-04-22 14:42 ` [PATCH 1/3] ntb_hw_switchtec: Remove redundant steps of switchtec_ntb_reinit_peer() function Wesley Sheng
2019-04-22 14:42 ` Wesley Sheng [this message]
2019-04-22 14:42 ` [PATCH 3/3] ntb_hw_switchtec: Fix setup MW with failure bug Wesley Sheng
-- strict thread matches above, loose matches on Subject: below --
2019-06-06 7:09 [PATCH 0/3] Redundant steps removal and bug fix of ntb_hw_switchtec Kelvin Cao
2019-06-06 7:09 ` [PATCH 2/3] ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case Kelvin Cao
2019-04-08 14:45 [PATCH 0/3] Redundant steps removal and bug fix of ntb_hw_switchtec Wesley Sheng
2019-04-08 14:45 ` [PATCH 2/3] ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case Wesley Sheng
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