From: "Russell King (Oracle)" rmk+kernel@armlinux.org.uk
[ Upstream commit 8475c4b70b040f9d8cbc308100f2c4d865f810b3 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/sfp.c | 38 ++++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-)
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index dcbe278086dc..79e8806a2d39 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -233,6 +233,7 @@ 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; @@ -495,17 +496,18 @@ static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 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) @@ -519,10 +521,11 @@ static void sfp_soft_stop_poll(struct sfp *sfp)
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; @@ -1888,6 +1891,15 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 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; @@ -2488,6 +2500,8 @@ static int sfp_probe(struct platform_device *pdev) 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;