net/sfc/base: infer port mode bandwidth from max link speed

Limit the port mode bandwidth calculations by the maximum
reported link speed. This system detects 25G vs 10G cards,
and 100G port modes vs 40G.

Signed-off-by: Richard Houldsworth <rhouldsworth@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>

diff --git a/drivers/net/sfc/base/ef10_nic.c b/drivers/net/sfc/base/ef10_nic.c
index 8cd76d6..c197ff9 100644 (file)
--- a/drivers/net/sfc/base/ef10_nic.c
+++ b/drivers/net/sfc/base/ef10_nic.c
@@ -133,9 +133,11 @@ ef10_nic_get_port_mode_bandwidth(
 {
        uint32_t port_modes;
        uint32_t current_mode;
-       uint32_t single_lane = 10000;
-       uint32_t dual_lane   = 50000;
-       uint32_t quad_lane   = 40000;
+       efx_port_t *epp = &(enp->en_port);
+
+       uint32_t single_lane;
+       uint32_t dual_lane;
+       uint32_t quad_lane;
        uint32_t bandwidth;
        efx_rc_t rc;
 
@@ -145,6 +147,21 @@ ef10_nic_get_port_mode_bandwidth(
                goto fail1;
        }
 
+       if (epp->ep_phy_cap_mask & (1 << EFX_PHY_CAP_25000FDX))
+               single_lane = 25000;
+       else
+               single_lane = 10000;
+
+       if (epp->ep_phy_cap_mask & (1 << EFX_PHY_CAP_50000FDX))
+               dual_lane = 50000;
+       else
+               dual_lane = 20000;
+
+       if (epp->ep_phy_cap_mask & (1 << EFX_PHY_CAP_100000FDX))
+               quad_lane = 100000;
+       else
+               quad_lane = 40000;
+
        switch (current_mode) {
        case TLV_PORT_MODE_1x1_NA:                      /* mode 0 */
                bandwidth = single_lane;