From: Russell King <rmk+kernel@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Heiner Kallweit <hkallweit1@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: [PATCH net-next 1/4] net: sfp: use a definition for the fault recovery attempts
Date: Mon, 09 Dec 2019 14:15:55 +0000 [thread overview]
Message-ID: <E1ieJpL-0004UQ-L7@rmk-PC.armlinux.org.uk> (raw)
In-Reply-To: <20191209141525.GK25745@shell.armlinux.org.uk>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
drivers/net/phy/sfp.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index bfe268028154..b1c564b79e3e 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -172,6 +172,14 @@ static const enum gpiod_flags gpio_flags[] = {
#define T_RESET_US 10
#define T_FAULT_RECOVER msecs_to_jiffies(1000)
+/* N_FAULT_INIT is the number of recovery attempts at module initialisation
+ * time. If the TX_FAULT signal is not deasserted after this number of
+ * attempts at clearing it, we decide that the module is faulty.
+ * N_FAULT is the same but after the module has initialised.
+ */
+#define N_FAULT_INIT 5
+#define N_FAULT 5
+
/* SFP module presence detection is poor: the three MOD DEF signals are
* the same length on the PCB, which means it's possible for MOD DEF 0 to
* connect before the I2C bus on MOD DEF 1/2.
@@ -1885,7 +1893,7 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event)
sfp_module_tx_enable(sfp);
/* Initialise the fault clearance retries */
- sfp->sm_retries = 5;
+ sfp->sm_retries = N_FAULT_INIT;
/* We need to check the TX_FAULT state, which is not defined
* while TX_DISABLE is asserted. The earliest we want to do
@@ -1925,7 +1933,7 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event)
* or t_start_up, so assume there is a fault.
*/
sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT,
- sfp->sm_retries == 5);
+ sfp->sm_retries == N_FAULT_INIT);
} else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) {
init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT
* clear. Probe for the PHY and check the LOS state.
@@ -1938,7 +1946,7 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event)
sfp_sm_link_check_los(sfp);
/* Reset the fault retry count */
- sfp->sm_retries = 5;
+ sfp->sm_retries = N_FAULT;
}
break;
--
2.20.1
next prev parent reply other threads:[~2019-12-09 14:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 14:15 [PATCH net-next 0/4] Add support for slow-to-probe-PHY copper SFP modules Russell King - ARM Linux admin
2019-12-09 14:15 ` Russell King [this message]
2019-12-09 17:43 ` [PATCH net-next 1/4] net: sfp: use a definition for the fault recovery attempts Andrew Lunn
2019-12-09 14:16 ` [PATCH net-next 2/4] net: sfp: rename sm_retries Russell King
2019-12-09 17:44 ` Andrew Lunn
2019-12-09 14:16 ` [PATCH net-next 3/4] net: sfp: error handling for phy probe Russell King
2019-12-09 17:45 ` Andrew Lunn
2019-12-09 14:16 ` [PATCH net-next 4/4] net: sfp: re-attempt probing for phy Russell King
2019-12-09 17:47 ` Andrew Lunn
2019-12-09 22:34 ` [PATCH net-next 0/4] Add support for slow-to-probe-PHY copper SFP modules David Miller
2019-12-09 22:35 ` David Miller
2019-12-09 22:38 ` Russell King - ARM Linux admin
2019-12-09 22:37 ` Russell King - ARM Linux admin
2019-12-11 20:46 ` 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=E1ieJpL-0004UQ-L7@rmk-PC.armlinux.org.uk \
--to=rmk+kernel@armlinux.org.uk \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=hkallweit1@gmail.com \
--cc=netdev@vger.kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).