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Message-ID: <Y+YFyI+FFQ3DDd6D@gmail.com>
Date: Fri, 10 Feb 2023 08:52:24 +0000
From: Martin Habets <habetsm.xilinx@...il.com>
To: alejandro.lucero-palau@....com
Cc: netdev@...r.kernel.org, linux-net-drivers@....com,
davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
edumazet@...gle.com, ecree.xilinx@...il.com,
linux-doc@...r.kernel.org, corbet@....net, jiri@...dia.com
Subject: Re: [PATCH v6 net-next 7/8] sfc: add support for devlink
port_function_hw_addr_get in ef100
On Wed, Feb 08, 2023 at 02:25:18PM +0000, alejandro.lucero-palau@....com wrote:
> From: Alejandro Lucero <alejandro.lucero-palau@....com>
>
> Using the builtin client handle id infrastructure, add support for
> obtaining the mac address linked to mports in ef100. This implies
> to execute an MCDI command for getting the data from the firmware
> for each devlink port.
>
> Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@....com>
Acked-by: Martin Habets <habetsm.xilinx@...il.com>
> ---
> drivers/net/ethernet/sfc/ef100_nic.c | 27 +++++++++++++++
> drivers/net/ethernet/sfc/ef100_nic.h | 1 +
> drivers/net/ethernet/sfc/ef100_rep.c | 8 +++++
> drivers/net/ethernet/sfc/ef100_rep.h | 1 +
> drivers/net/ethernet/sfc/efx_devlink.c | 46 ++++++++++++++++++++++++++
> 5 files changed, 83 insertions(+)
>
> diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
> index aa48c79a2149..becd21c2325d 100644
> --- a/drivers/net/ethernet/sfc/ef100_nic.c
> +++ b/drivers/net/ethernet/sfc/ef100_nic.c
> @@ -1122,6 +1122,33 @@ static int ef100_probe_main(struct efx_nic *efx)
> return rc;
> }
>
> +/* MCDI commands are related to the same device issuing them. This function
> + * allows to do an MCDI command on behalf of another device, mainly PFs setting
> + * things for VFs.
> + */
> +int efx_ef100_lookup_client_id(struct efx_nic *efx, efx_qword_t pciefn, u32 *id)
> +{
> + MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_CLIENT_HANDLE_OUT_LEN);
> + MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_CLIENT_HANDLE_IN_LEN);
> + u64 pciefn_flat = le64_to_cpu(pciefn.u64[0]);
> + size_t outlen;
> + int rc;
> +
> + MCDI_SET_DWORD(inbuf, GET_CLIENT_HANDLE_IN_TYPE,
> + MC_CMD_GET_CLIENT_HANDLE_IN_TYPE_FUNC);
> + MCDI_SET_QWORD(inbuf, GET_CLIENT_HANDLE_IN_FUNC,
> + pciefn_flat);
> +
> + rc = efx_mcdi_rpc(efx, MC_CMD_GET_CLIENT_HANDLE, inbuf, sizeof(inbuf),
> + outbuf, sizeof(outbuf), &outlen);
> + if (rc)
> + return rc;
> + if (outlen < sizeof(outbuf))
> + return -EIO;
> + *id = MCDI_DWORD(outbuf, GET_CLIENT_HANDLE_OUT_HANDLE);
> + return 0;
> +}
> +
> int ef100_probe_netdev_pf(struct efx_nic *efx)
> {
> struct ef100_nic_data *nic_data = efx->nic_data;
> diff --git a/drivers/net/ethernet/sfc/ef100_nic.h b/drivers/net/ethernet/sfc/ef100_nic.h
> index e59044072333..f1ed481c1260 100644
> --- a/drivers/net/ethernet/sfc/ef100_nic.h
> +++ b/drivers/net/ethernet/sfc/ef100_nic.h
> @@ -94,4 +94,5 @@ int ef100_filter_table_probe(struct efx_nic *efx);
>
> int ef100_get_mac_address(struct efx_nic *efx, u8 *mac_address,
> int client_handle, bool empty_ok);
> +int efx_ef100_lookup_client_id(struct efx_nic *efx, efx_qword_t pciefn, u32 *id);
> #endif /* EFX_EF100_NIC_H */
> diff --git a/drivers/net/ethernet/sfc/ef100_rep.c b/drivers/net/ethernet/sfc/ef100_rep.c
> index 6b5bc5d6955d..0b3083ef0ead 100644
> --- a/drivers/net/ethernet/sfc/ef100_rep.c
> +++ b/drivers/net/ethernet/sfc/ef100_rep.c
> @@ -361,6 +361,14 @@ bool ef100_mport_on_local_intf(struct efx_nic *efx,
> mport_desc->interface_idx == nic_data->local_mae_intf;
> }
>
> +bool ef100_mport_is_vf(struct mae_mport_desc *mport_desc)
> +{
> + bool pcie_func;
> +
> + pcie_func = ef100_mport_is_pcie_vnic(mport_desc);
> + return pcie_func && (mport_desc->vf_idx != MAE_MPORT_DESC_VF_IDX_NULL);
> +}
> +
> void efx_ef100_init_reps(struct efx_nic *efx)
> {
> struct ef100_nic_data *nic_data = efx->nic_data;
> diff --git a/drivers/net/ethernet/sfc/ef100_rep.h b/drivers/net/ethernet/sfc/ef100_rep.h
> index ae6add4b0855..a042525a2240 100644
> --- a/drivers/net/ethernet/sfc/ef100_rep.h
> +++ b/drivers/net/ethernet/sfc/ef100_rep.h
> @@ -76,4 +76,5 @@ void efx_ef100_fini_reps(struct efx_nic *efx);
> struct mae_mport_desc;
> bool ef100_mport_on_local_intf(struct efx_nic *efx,
> struct mae_mport_desc *mport_desc);
> +bool ef100_mport_is_vf(struct mae_mport_desc *mport_desc);
> #endif /* EF100_REP_H */
> diff --git a/drivers/net/ethernet/sfc/efx_devlink.c b/drivers/net/ethernet/sfc/efx_devlink.c
> index 1b1276716113..68d04c2176d3 100644
> --- a/drivers/net/ethernet/sfc/efx_devlink.c
> +++ b/drivers/net/ethernet/sfc/efx_devlink.c
> @@ -11,6 +11,7 @@
> #include "efx_devlink.h"
> #ifdef CONFIG_SFC_SRIOV
> #include <linux/rtc.h>
> +#include "ef100_nic.h"
> #include "mcdi.h"
> #include "mcdi_functions.h"
> #include "mcdi_pcol.h"
> @@ -58,6 +59,50 @@ static int efx_devlink_add_port(struct efx_nic *efx,
> return devl_port_register(efx->devlink, &mport->dl_port, mport->mport_id);
> }
>
> +static int efx_devlink_port_addr_get(struct devlink_port *port, u8 *hw_addr,
> + int *hw_addr_len,
> + struct netlink_ext_ack *extack)
> +{
> + struct efx_devlink *devlink = devlink_priv(port->devlink);
> + struct mae_mport_desc *mport_desc;
> + efx_qword_t pciefn;
> + u32 client_id;
> + int rc;
> +
> + mport_desc = container_of(port, struct mae_mport_desc, dl_port);
> +
> + if (!ef100_mport_on_local_intf(devlink->efx, mport_desc)) {
> + NL_SET_ERR_MSG_MOD(extack, "Port not on local interface");
> + return -EINVAL;
> + }
> +
> + if (ef100_mport_is_vf(mport_desc))
> + EFX_POPULATE_QWORD_3(pciefn,
> + PCIE_FUNCTION_PF, PCIE_FUNCTION_PF_NULL,
> + PCIE_FUNCTION_VF, mport_desc->vf_idx,
> + PCIE_FUNCTION_INTF, PCIE_INTERFACE_CALLER);
> + else
> + EFX_POPULATE_QWORD_3(pciefn,
> + PCIE_FUNCTION_PF, mport_desc->pf_idx,
> + PCIE_FUNCTION_VF, PCIE_FUNCTION_VF_NULL,
> + PCIE_FUNCTION_INTF, PCIE_INTERFACE_CALLER);
> +
> + rc = efx_ef100_lookup_client_id(devlink->efx, pciefn, &client_id);
> + if (rc) {
> + NL_SET_ERR_MSG_MOD(extack, "No internal client_ID for port");
> + return -EIO;
> + }
> +
> + rc = ef100_get_mac_address(devlink->efx, hw_addr, client_id, true);
> + if (rc) {
> + NL_SET_ERR_MSG_MOD(extack, "No MAC available");
> + return -ENOENT;
> + }
> +
> + *hw_addr_len = ETH_ALEN;
> + return rc;
> +}
> +
> static int efx_devlink_info_nvram_partition(struct efx_nic *efx,
> struct devlink_info_req *req,
> unsigned int partition_type,
> @@ -511,6 +556,7 @@ static int efx_devlink_info_get(struct devlink *devlink,
> static const struct devlink_ops sfc_devlink_ops = {
> #ifdef CONFIG_SFC_SRIOV
> .info_get = efx_devlink_info_get,
> + .port_function_hw_addr_get = efx_devlink_port_addr_get,
> #endif
> };
>
> --
> 2.17.1
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