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1c16b574c4
Backport the phy/phylink/sfp patches currently queued in netdev or in mainline necessary to support GPON popular modules, specifically to support Huawei and Nokia GPON modules. Signed-off-by: Russell King <linux@armlinux.org.uk> [jonas.gorski: include kernel version in file names, refresh patches] Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
160 lines
4.3 KiB
Diff
160 lines
4.3 KiB
Diff
From 57cbf7453551db1df619b79410d79fc418d862d5 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Tue, 5 Nov 2019 13:00:45 +0000
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Subject: [PATCH 632/660] net: sfp: move module insert reporting out of probe
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Move the module insertion reporting out of the probe handling, but
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after we have detected that the upstream has attached (since that is
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whom we are reporting insertion to.)
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Only report module removal if we had previously reported a module
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insertion.
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This gives cleaner semantics, and means we can probe the module before
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we have an upstream attached.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/net/phy/sfp.c | 58 +++++++++++++++++++++++++++++--------------
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1 file changed, 40 insertions(+), 18 deletions(-)
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--- a/drivers/net/phy/sfp.c
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+++ b/drivers/net/phy/sfp.c
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@@ -45,11 +45,12 @@ enum {
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SFP_E_TIMEOUT,
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SFP_MOD_EMPTY = 0,
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+ SFP_MOD_ERROR,
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SFP_MOD_PROBE,
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+ SFP_MOD_WAITDEV,
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SFP_MOD_HPOWER,
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SFP_MOD_WAITPWR,
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SFP_MOD_PRESENT,
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- SFP_MOD_ERROR,
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SFP_DEV_DETACHED = 0,
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SFP_DEV_DOWN,
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@@ -68,11 +69,12 @@ enum {
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static const char * const mod_state_strings[] = {
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[SFP_MOD_EMPTY] = "empty",
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+ [SFP_MOD_ERROR] = "error",
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[SFP_MOD_PROBE] = "probe",
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+ [SFP_MOD_WAITDEV] = "waitdev",
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[SFP_MOD_HPOWER] = "hpower",
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[SFP_MOD_WAITPWR] = "waitpwr",
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[SFP_MOD_PRESENT] = "present",
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- [SFP_MOD_ERROR] = "error",
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};
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static const char *mod_state_to_str(unsigned short mod_state)
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@@ -1479,16 +1481,13 @@ static int sfp_sm_mod_probe(struct sfp *
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if (ret < 0)
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return ret;
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- ret = sfp_module_insert(sfp->sfp_bus, &sfp->id);
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- if (ret < 0)
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- return ret;
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-
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return 0;
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}
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static void sfp_sm_mod_remove(struct sfp *sfp)
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{
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- sfp_module_remove(sfp->sfp_bus);
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+ if (sfp->sm_mod_state > SFP_MOD_WAITDEV)
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+ sfp_module_remove(sfp->sfp_bus);
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sfp_hwmon_remove(sfp);
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@@ -1539,12 +1538,12 @@ static void sfp_sm_module(struct sfp *sf
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}
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/* Handle device detach globally */
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- if (sfp->sm_dev_state < SFP_DEV_DOWN) {
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+ if (sfp->sm_dev_state < SFP_DEV_DOWN &&
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+ sfp->sm_mod_state > SFP_MOD_WAITDEV) {
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if (sfp->module_power_mW > 1000 &&
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sfp->sm_mod_state > SFP_MOD_HPOWER)
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sfp_sm_mod_hpower(sfp, false);
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- if (sfp->sm_mod_state > SFP_MOD_EMPTY)
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- sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0);
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+ sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
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return;
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}
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@@ -1555,6 +1554,7 @@ static void sfp_sm_module(struct sfp *sf
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break;
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case SFP_MOD_PROBE:
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+ /* Wait for T_PROBE_INIT to time out */
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if (event != SFP_E_TIMEOUT)
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break;
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@@ -1568,6 +1568,20 @@ static void sfp_sm_module(struct sfp *sf
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break;
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}
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+ sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
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+ /* fall through */
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+ case SFP_MOD_WAITDEV:
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+ /* Ensure that the device is attached before proceeding */
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+ if (sfp->sm_dev_state < SFP_DEV_DOWN)
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+ break;
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+
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+ /* Report the module insertion to the upstream device */
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+ err = sfp_module_insert(sfp->sfp_bus, &sfp->id);
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+ if (err < 0) {
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+ sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
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+ break;
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+ }
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+
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/* If this is a power level 1 module, we are done */
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if (sfp->module_power_mW <= 1000)
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goto insert;
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@@ -1577,12 +1591,17 @@ static void sfp_sm_module(struct sfp *sf
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case SFP_MOD_HPOWER:
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/* Enable high power mode */
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err = sfp_sm_mod_hpower(sfp, true);
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- if (err == 0)
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- sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL);
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- else if (err != -EAGAIN)
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- sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
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- else
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- sfp_sm_set_timer(sfp, T_PROBE_RETRY);
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+ if (err < 0) {
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+ if (err != -EAGAIN) {
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+ sfp_module_remove(sfp->sfp_bus);
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+ sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
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+ } else {
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+ sfp_sm_set_timer(sfp, T_PROBE_RETRY);
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+ }
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+ break;
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+ }
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+
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+ sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL);
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break;
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case SFP_MOD_WAITPWR:
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@@ -1750,8 +1769,6 @@ static void sfp_sm_event(struct sfp *sfp
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static void sfp_attach(struct sfp *sfp)
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{
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sfp_sm_event(sfp, SFP_E_DEV_ATTACH);
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- if (sfp->state & SFP_F_PRESENT)
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- sfp_sm_event(sfp, SFP_E_INSERT);
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}
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static void sfp_detach(struct sfp *sfp)
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@@ -2001,6 +2018,11 @@ static int sfp_probe(struct platform_dev
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sfp->state |= SFP_F_RATE_SELECT;
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sfp_set_state(sfp, sfp->state);
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sfp_module_tx_disable(sfp);
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+ if (sfp->state & SFP_F_PRESENT) {
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+ rtnl_lock();
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+ sfp_sm_event(sfp, SFP_E_INSERT);
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+ rtnl_unlock();
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+ }
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for (i = 0; i < GPIO_MAX; i++) {
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if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i])
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