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From d4b8746219e8c0361e5ed6e440ab3a8a600d1f76 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 11 Oct 2019 17:24:40 +0100
Subject: [PATCH 623/660] net: sfp: parse SFP power requirement earlier
Parse the SFP power requirement earlier, in preparation for moving the
power level setup code.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
drivers/net/phy/sfp.c | 42 +++++++++++++++++++++++++++++-------------
1 file changed, 29 insertions(+), 13 deletions(-)
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -196,6 +196,8 @@ struct sfp {
unsigned int sm_retries;
struct sfp_eeprom_id id;
+ unsigned int module_power_mW;
+
#if IS_ENABLED(CONFIG_HWMON)
struct sfp_diag diag;
struct device *hwmon_dev;
@@ -1309,17 +1311,14 @@ static void sfp_sm_mod_init(struct sfp *
sfp_sm_probe_phy(sfp);
}
-static int sfp_sm_mod_hpower(struct sfp *sfp)
+static int sfp_module_parse_power(struct sfp *sfp)
{
- u32 power;
- u8 val;
- int err;
+ u32 power_mW = 1000;
- power = 1000;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
- power = 1500;
+ power_mW = 1500;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
- power = 2000;
+ power_mW = 2000;
if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE &&
(sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) !=
@@ -1328,23 +1327,33 @@ static int sfp_sm_mod_hpower(struct sfp
* or requires an address change sequence, so assume that
* the module powers up in the indicated power mode.
*/
- if (power > sfp->max_power_mW) {
+ if (power_mW > sfp->max_power_mW) {
dev_err(sfp->dev,
"Host does not support %u.%uW modules\n",
- power / 1000, (power / 100) % 10);
+ power_mW / 1000, (power_mW / 100) % 10);
return -EINVAL;
}
return 0;
}
- if (power > sfp->max_power_mW) {
+ if (power_mW > sfp->max_power_mW) {
dev_warn(sfp->dev,
"Host does not support %u.%uW modules, module left in power mode 1\n",
- power / 1000, (power / 100) % 10);
+ power_mW / 1000, (power_mW / 100) % 10);
return 0;
}
- if (power <= 1000)
+ sfp->module_power_mW = power_mW;
+
+ return 0;
+}
+
+static int sfp_sm_mod_hpower(struct sfp *sfp)
+{
+ u8 val;
+ int err;
+
+ if (sfp->module_power_mW <= 1000)
return 0;
err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
@@ -1364,7 +1373,8 @@ static int sfp_sm_mod_hpower(struct sfp
}
dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
- power / 1000, (power / 100) % 10);
+ sfp->module_power_mW / 1000,
+ (sfp->module_power_mW / 100) % 10);
return T_HPOWER_LEVEL;
err:
@@ -1451,6 +1461,11 @@ static int sfp_sm_mod_probe(struct sfp *
dev_warn(sfp->dev,
"module address swap to access page 0xA2 is not supported.\n");
+ /* Parse the module power requirement */
+ ret = sfp_module_parse_power(sfp);
+ if (ret < 0)
+ return ret;
+
ret = sfp_hwmon_insert(sfp);
if (ret < 0)
return ret;
@@ -1474,6 +1489,7 @@ static void sfp_sm_mod_remove(struct sfp
sfp_module_tx_disable(sfp);
memset(&sfp->id, 0, sizeof(sfp->id));
+ sfp->module_power_mW = 0;
dev_info(sfp->dev, "module removed\n");
}
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