diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/783-v6.1-net-sfp-re-implement-soft-state-polling-setup.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/783-v6.1-net-sfp-re-implement-soft-state-polling-setup.patch | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/783-v6.1-net-sfp-re-implement-soft-state-polling-setup.patch b/target/linux/generic/backport-5.15/783-v6.1-net-sfp-re-implement-soft-state-polling-setup.patch new file mode 100644 index 0000000000..6f69b7ddfe --- /dev/null +++ b/target/linux/generic/backport-5.15/783-v6.1-net-sfp-re-implement-soft-state-polling-setup.patch @@ -0,0 +1,98 @@ +From 8475c4b70b040f9d8cbc308100f2c4d865f810b3 Mon Sep 17 00:00:00 2001 +From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk> +Date: Tue, 13 Sep 2022 20:06:27 +0100 +Subject: [PATCH 1/1] net: sfp: re-implement soft state polling setup + +Re-implement the decision making for soft state polling. Instead of +generating the soft state mask in sfp_soft_start_poll() by looking at +which GPIOs are available, record their availability in +sfp_sm_mod_probe() in sfp->state_hw_mask. + +This will then allow us to clear bits in sfp->state_hw_mask in module +specific quirks when the hardware signals should not be used, thereby +allowing us to switch to using the software state polling. + +Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> +Signed-off-by: Jakub Kicinski <kuba@kernel.org> +--- + drivers/net/phy/sfp.c | 38 ++++++++++++++++++++++++++------------ + 1 file changed, 26 insertions(+), 12 deletions(-) + +--- a/drivers/net/phy/sfp.c ++++ b/drivers/net/phy/sfp.c +@@ -234,6 +234,7 @@ struct sfp { + bool need_poll; + + struct mutex st_mutex; /* Protects state */ ++ unsigned int state_hw_mask; + unsigned int state_soft_mask; + unsigned int state; + struct delayed_work poll; +@@ -499,17 +500,18 @@ static void sfp_soft_set_state(struct sf + static void sfp_soft_start_poll(struct sfp *sfp) + { + const struct sfp_eeprom_id *id = &sfp->id; ++ unsigned int mask = 0; + + sfp->state_soft_mask = 0; +- if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && +- !sfp->gpio[GPIO_TX_DISABLE]) +- sfp->state_soft_mask |= SFP_F_TX_DISABLE; +- if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && +- !sfp->gpio[GPIO_TX_FAULT]) +- sfp->state_soft_mask |= SFP_F_TX_FAULT; +- if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && +- !sfp->gpio[GPIO_LOS]) +- sfp->state_soft_mask |= SFP_F_LOS; ++ if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE) ++ mask |= SFP_F_TX_DISABLE; ++ if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT) ++ mask |= SFP_F_TX_FAULT; ++ if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS) ++ mask |= SFP_F_LOS; ++ ++ // Poll the soft state for hardware pins we want to ignore ++ sfp->state_soft_mask = ~sfp->state_hw_mask & mask; + + if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && + !sfp->need_poll) +@@ -523,10 +525,11 @@ static void sfp_soft_stop_poll(struct sf + + static unsigned int sfp_get_state(struct sfp *sfp) + { +- unsigned int state = sfp->get_state(sfp); ++ unsigned int soft = sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT); ++ unsigned int state; + +- if (state & SFP_F_PRESENT && +- sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) ++ state = sfp->get_state(sfp) & sfp->state_hw_mask; ++ if (state & SFP_F_PRESENT && soft) + state |= sfp_soft_get_state(sfp); + + return state; +@@ -1940,6 +1943,15 @@ static int sfp_sm_mod_probe(struct sfp * + if (ret < 0) + return ret; + ++ /* Initialise state bits to use from hardware */ ++ sfp->state_hw_mask = SFP_F_PRESENT; ++ if (sfp->gpio[GPIO_TX_DISABLE]) ++ sfp->state_hw_mask |= SFP_F_TX_DISABLE; ++ if (sfp->gpio[GPIO_TX_FAULT]) ++ sfp->state_hw_mask |= SFP_F_TX_FAULT; ++ if (sfp->gpio[GPIO_LOS]) ++ sfp->state_hw_mask |= SFP_F_LOS; ++ + if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && + !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) + sfp->module_t_start_up = T_START_UP_BAD_GPON; +@@ -2565,6 +2577,8 @@ static int sfp_probe(struct platform_dev + return PTR_ERR(sfp->gpio[i]); + } + ++ sfp->state_hw_mask = SFP_F_PRESENT; ++ + sfp->get_state = sfp_gpio_get_state; + sfp->set_state = sfp_gpio_set_state; + |