sfc: determine representee m-port for EF100 representors
[linux-2.6-microblaze.git] / drivers / net / ethernet / sfc / mae.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3  * Driver for Solarflare network controllers and boards
4  * Copyright 2019 Solarflare Communications Inc.
5  * Copyright 2020-2022 Xilinx Inc.
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published
9  * by the Free Software Foundation, incorporated herein by reference.
10  */
11
12 #include "mae.h"
13 #include "mcdi.h"
14 #include "mcdi_pcol.h"
15
16 void efx_mae_mport_vf(struct efx_nic *efx __always_unused, u32 vf_id, u32 *out)
17 {
18         efx_dword_t mport;
19
20         EFX_POPULATE_DWORD_3(mport,
21                              MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_FUNC,
22                              MAE_MPORT_SELECTOR_FUNC_PF_ID, MAE_MPORT_SELECTOR_FUNC_PF_ID_CALLER,
23                              MAE_MPORT_SELECTOR_FUNC_VF_ID, vf_id);
24         *out = EFX_DWORD_VAL(mport);
25 }
26
27 /* id is really only 24 bits wide */
28 int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id)
29 {
30         MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_MPORT_LOOKUP_OUT_LEN);
31         MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_LOOKUP_IN_LEN);
32         size_t outlen;
33         int rc;
34
35         MCDI_SET_DWORD(inbuf, MAE_MPORT_LOOKUP_IN_MPORT_SELECTOR, selector);
36         rc = efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_LOOKUP, inbuf, sizeof(inbuf),
37                           outbuf, sizeof(outbuf), &outlen);
38         if (rc)
39                 return rc;
40         if (outlen < sizeof(outbuf))
41                 return -EIO;
42         *id = MCDI_DWORD(outbuf, MAE_MPORT_LOOKUP_OUT_MPORT_ID);
43         return 0;
44 }