[PATCH 25/46] common/sfc_efx/base: decode netport link state on probe path

[Ivan Malov]

Retrieved properties form the advertised PHY capability mask.
The new code also helps to check support for autonegotiation.

Signed-off-by: Ivan Malov <ivan.ma...@arknetworks.am>
Reviewed-by: Andy Moreton <andy.more...@amd.com>
Reviewed-by: Pieter Jansen Van Vuuren <pieter.jansen-van-vuu...@amd.com>
---
 drivers/common/sfc_efx/base/efx_impl.h | 12 +++++
 drivers/common/sfc_efx/base/efx_np.c   | 67 ++++++++++++++++++++++++++
 2 files changed, 79 insertions(+)

diff --git a/drivers/common/sfc_efx/base/efx_impl.h 
b/drivers/common/sfc_efx/base/efx_impl.h
index 4952f45121..a3e60fd19b 100644
--- a/drivers/common/sfc_efx/base/efx_impl.h
+++ b/drivers/common/sfc_efx/base/efx_impl.h
@@ -1899,6 +1899,18 @@ extern           void
 efx_np_detach(
        __in    efx_nic_t *enp);
 
+typedef struct efx_np_link_state_s {
+       uint32_t                enls_adv_cap_mask;
+       boolean_t               enls_an_supported;
+} efx_np_link_state_t;
+
+LIBEFX_INTERNAL
+extern __checkReturn   efx_rc_t
+efx_np_link_state(
+       __in            efx_nic_t *enp,
+       __in            efx_np_handle_t nph,
+       __out           efx_np_link_state_t *lsp);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/drivers/common/sfc_efx/base/efx_np.c 
b/drivers/common/sfc_efx/base/efx_np.c
index 6a36abf5c9..4d69e620d9 100644
--- a/drivers/common/sfc_efx/base/efx_np.c
+++ b/drivers/common/sfc_efx/base/efx_np.c
@@ -273,6 +273,61 @@ efx_np_get_fixed_port_props(
 fail2:
        EFSYS_PROBE(fail2);
 
+fail1:
+       EFSYS_PROBE1(fail1, efx_rc_t, rc);
+       return (rc);
+}
+
+       __checkReturn   efx_rc_t
+efx_np_link_state(
+       __in            efx_nic_t *enp,
+       __in            efx_np_handle_t nph,
+       __out           efx_np_link_state_t *lsp)
+{
+       EFX_MCDI_DECLARE_BUF(payload,
+           MC_CMD_LINK_STATE_IN_LEN,
+           MC_CMD_LINK_STATE_OUT_V3_LEN);
+       efx_mcdi_req_t req;
+       efx_rc_t rc;
+
+       req.emr_out_length = MC_CMD_LINK_STATE_OUT_V3_LEN;
+       req.emr_in_length = MC_CMD_LINK_STATE_IN_LEN;
+       req.emr_cmd = MC_CMD_LINK_STATE;
+       req.emr_out_buf = payload;
+       req.emr_in_buf = payload;
+
+       MCDI_IN_SET_DWORD(req, LINK_STATE_IN_PORT_HANDLE, nph);
+
+       efx_mcdi_execute(enp, &req);
+
+       if (req.emr_rc != 0) {
+               rc = req.emr_rc;
+               goto fail1;
+       }
+
+       if (req.emr_out_length_used < MC_CMD_LINK_STATE_OUT_V3_LEN) {
+               rc = EMSGSIZE;
+               goto fail2;
+       }
+
+       memset(lsp, 0, sizeof (*lsp));
+
+       if (MCDI_OUT_DWORD(req, LINK_STATE_OUT_V2_LOCAL_AN_SUPPORT) !=
+           MC_CMD_AN_NONE)
+               lsp->enls_an_supported = B_TRUE;
+
+       if (lsp->enls_an_supported != B_FALSE)
+               lsp->enls_adv_cap_mask |= 1U << EFX_PHY_CAP_AN;
+
+       efx_np_cap_hw_data_to_sw_mask(
+           MCDI_OUT2(req, const uint8_t, LINK_STATE_OUT_ADVERTISED_ABILITIES),
+           &lsp->enls_adv_cap_mask);
+
+       return (0);
+
+fail2:
+       EFSYS_PROBE(fail2);
+
 fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);
        return (rc);
@@ -284,6 +339,7 @@ efx_np_attach(
 {
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        efx_port_t *epp = &(enp->en_port);
+       efx_np_link_state_t ls;
        efx_rc_t rc;
 
        if (efx_np_supported(enp) == B_FALSE)
@@ -315,8 +371,19 @@ efx_np_attach(
        if (rc != 0)
                goto fail2;
 
+       rc = efx_np_link_state(enp, epp->ep_np_handle, &ls);
+       if (rc != 0)
+               goto fail3;
+
+       if (ls.enls_an_supported != B_FALSE)
+               epp->ep_phy_cap_mask |= 1U << EFX_PHY_CAP_AN;
+
+       epp->ep_adv_cap_mask = ls.enls_adv_cap_mask;
        return (0);
 
+fail3:
+       EFSYS_PROBE(fail3);
+
 fail2:
        EFSYS_PROBE(fail2);
 
-- 
2.39.5