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net: xpcs: add support for retrieving supported interface modes 

Add a function to the xpcs driver to retrieve the supported PHY
interface modes, which can be used by drivers to fill in phylink's
supported_interfaces mask.

We validate the interface bit index to ensure that it fits within the
bitmap as xpcs lists PHY_INTERFACE_MODE_MAX in an entry.

Tested-by: Wong Vee Khee <vee.khee.wong@linux.intel.com> # Intel EHL            Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King (Oracle) 2022-01-26 10:25:55 +00:00 committed by David S. Miller
parent 3cade91d0e
commit be6ec5b702
2 changed files with 15 additions and 0 deletions
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14
drivers/net/pcs/pcs-xpcs.c
View File

@ -662,6 +662,20 @@ void xpcs_validate(struct dw_xpcs *xpcs, unsigned long *supported,
}
EXPORT_SYMBOL_GPL(xpcs_validate);
void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces)
{
int i, j;
for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
const struct xpcs_compat *compat = &xpcs->id->compat[i];
for (j = 0; j < compat->num_interfaces; j++)
if (compat->interface[j] < PHY_INTERFACE_MODE_MAX)
__set_bit(compat->interface[j], interfaces);
}
}
EXPORT_SYMBOL_GPL(xpcs_get_interfaces);
int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, int enable)
{
int ret;

1
include/linux/pcs/pcs-xpcs.h
View File

@ -33,6 +33,7 @@ int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface,
unsigned int mode);
void xpcs_validate(struct dw_xpcs *xpcs, unsigned long *supported,
struct phylink_link_state *state);
void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces);
int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns,
int enable);
struct dw_xpcs *xpcs_create(struct mdio_device *mdiodev,