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Date: Fri, 20 Jan 2023 12:00:45 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: "Lucero Palau, Alejandro" <alejandro.lucero-palau@....com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-net-drivers (AMD-Xilinx)" <linux-net-drivers@....com>,
"davem@...emloft.net" <davem@...emloft.net>,
"kuba@...nel.org" <kuba@...nel.org>,
"pabeni@...hat.com" <pabeni@...hat.com>,
"edumazet@...gle.com" <edumazet@...gle.com>,
"habetsm@...il.com" <habetsm@...il.com>,
"ecree.xilinx@...il.com" <ecree.xilinx@...il.com>
Subject: Re: [PATCH net-next 1/7] sfc: add devlink support for ef100
Thu, Jan 19, 2023 at 03:51:53PM CET, alejandro.lucero-palau@....com wrote:
>
>On 1/19/23 12:14, Jiri Pirko wrote:
>> Thu, Jan 19, 2023 at 12:31:34PM CET, alejandro.lucero-palau@....com wrote:
>>> From: Alejandro Lucero <alejandro.lucero-palau@....com>
>>>
>>> Basic support for devlink info command.
>>>
>>> Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@....com>
>>> ---
>>> drivers/net/ethernet/sfc/Kconfig | 1 +
>>> drivers/net/ethernet/sfc/Makefile | 3 +-
>>> drivers/net/ethernet/sfc/ef100_nic.c | 6 +
>>> drivers/net/ethernet/sfc/efx_devlink.c | 427 +++++++++++++++++++++++++
>>> drivers/net/ethernet/sfc/efx_devlink.h | 20 ++
>>> drivers/net/ethernet/sfc/mcdi.c | 72 +++++
>>> drivers/net/ethernet/sfc/mcdi.h | 3 +
>>> drivers/net/ethernet/sfc/net_driver.h | 2 +
>>> 8 files changed, 533 insertions(+), 1 deletion(-)
>>> create mode 100644 drivers/net/ethernet/sfc/efx_devlink.c
>>> create mode 100644 drivers/net/ethernet/sfc/efx_devlink.h
>> Could you please split?
>>
>> At least the devlink introduction part and info implementation.
>>
>
>Sure.
>
>>> diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
>>> index 0950e6b0508f..4af36ba8906b 100644
>>> --- a/drivers/net/ethernet/sfc/Kconfig
>>> +++ b/drivers/net/ethernet/sfc/Kconfig
>>> @@ -22,6 +22,7 @@ config SFC
>>> depends on PTP_1588_CLOCK_OPTIONAL
>>> select MDIO
>>> select CRC32
>>> + select NET_DEVLINK
>>> help
>>> This driver supports 10/40-gigabit Ethernet cards based on
>>> the Solarflare SFC9100-family controllers.
>>> diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
>>> index 712a48d00069..55b9c73cd8ef 100644
>>> --- a/drivers/net/ethernet/sfc/Makefile
>>> +++ b/drivers/net/ethernet/sfc/Makefile
>>> @@ -6,7 +6,8 @@ sfc-y += efx.o efx_common.o efx_channels.o nic.o \
>>> mcdi.o mcdi_port.o mcdi_port_common.o \
>>> mcdi_functions.o mcdi_filters.o mcdi_mon.o \
>>> ef100.o ef100_nic.o ef100_netdev.o \
>>> - ef100_ethtool.o ef100_rx.o ef100_tx.o
>>> + ef100_ethtool.o ef100_rx.o ef100_tx.o \
>>> + efx_devlink.o
>>> sfc-$(CONFIG_SFC_MTD) += mtd.o
>>> sfc-$(CONFIG_SFC_SRIOV) += sriov.o ef10_sriov.o ef100_sriov.o ef100_rep.o \
>>> mae.o tc.o tc_bindings.o tc_counters.o
>>> diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
>>> index ad686c671ab8..14af8f314b83 100644
>>> --- a/drivers/net/ethernet/sfc/ef100_nic.c
>>> +++ b/drivers/net/ethernet/sfc/ef100_nic.c
>>> @@ -27,6 +27,7 @@
>>> #include "tc.h"
>>> #include "mae.h"
>>> #include "rx_common.h"
>>> +#include "efx_devlink.h"
>>>
>>> #define EF100_MAX_VIS 4096
>>> #define EF100_NUM_MCDI_BUFFERS 1
>>> @@ -1124,6 +1125,10 @@ int ef100_probe_netdev_pf(struct efx_nic *efx)
>>> netif_warn(efx, probe, net_dev,
>>> "Failed to probe base mport rc %d; representors will not function\n",
>>> rc);
>>> + } else {
>>> + if (efx_probe_devlink(efx))
>> I don't understand why the devlink register call is here.
>> 1) You can registers it for PF and VF. I don't follow why you do it only
>> for PF.
>
>We discuss the possibility of creating the devlink interface for VFs,
>but we decided not to. Arguably, this should not be available for VFs
>owned by VMs/containers, or at least in our case, since the interface is
>being used for getting information about the whole device or for
>getting/setting the MAC address. We plan to support more devlink
>functionalities in the near future, so maybe we add such support then if
>we consider it is needed.
Okay.
>
>> 2) It should be done as the first thing in the probe flow. Then devlink
>> port register, only after that netdev. It makes sense from the
>> perspective of object hierarchy.
>
>I can not see a problem here. It is not the first thing done in the
>probe function, but I can not see any dependency for being so. And it is
>done before the devlink port registration and before the netdev
>registration what seems to be what other drivers do. What am I missing
>here?
Yep, currently, it does not matter for you, but when you implement
devlink reload for example, it will become a problem. Better to have it
done correctly from the beginning. Up to you.
Remember, what other drivers do does not mean it is a good practise :
>
>>
>> It is also usual to have the devlink priv as the "main" driver
>> structure storage, see how that is done in mlx5 of mlxsw for example.
>
>I will check the way others drivers use the devlink priv.
>
>>
>>
>>> + netif_warn(efx, probe, net_dev,
>>> + "Failed to register devlink\n");
>>> }
>>>
>>> rc = efx_init_tc(efx);
>>> @@ -1157,6 +1162,7 @@ void ef100_remove(struct efx_nic *efx)
>>> {
>>> struct ef100_nic_data *nic_data = efx->nic_data;
>>>
>>> + efx_fini_devlink(efx);
>>> efx_mcdi_detach(efx);
>>> efx_mcdi_fini(efx);
>>> if (nic_data)
>>> diff --git a/drivers/net/ethernet/sfc/efx_devlink.c b/drivers/net/ethernet/sfc/efx_devlink.c
>>> new file mode 100644
>>> index 000000000000..c506f8f35d25
>>> --- /dev/null
>>> +++ b/drivers/net/ethernet/sfc/efx_devlink.c
>>> @@ -0,0 +1,427 @@
>>> +// SPDX-License-Identifier: GPL-2.0-only
>>> +/****************************************************************************
>>> + * Driver for AMD network controllers and boards
>>> + * Copyright (C) 2023, Advanced Micro Devices, Inc.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify it
>>> + * under the terms of the GNU General Public License version 2 as published
>>> + * by the Free Software Foundation, incorporated herein by reference.
>>> + */
>>> +
>>> +#include <linux/rtc.h>
>>> +#include "net_driver.h"
>>> +#include "ef100_nic.h"
>>> +#include "efx_devlink.h"
>>> +#include "nic.h"
>>> +#include "mcdi.h"
>>> +#include "mcdi_functions.h"
>>> +#include "mcdi_pcol.h"
>>> +
>>> +/* Custom devlink-info version object names for details that do not map to the
>>> + * generic standardized names.
>>> + */
>>> +#define EFX_DEVLINK_INFO_VERSION_FW_MGMT_SUC "fw.mgmt.suc"
>>> +#define EFX_DEVLINK_INFO_VERSION_FW_MGMT_CMC "fw.mgmt.cmc"
>>> +#define EFX_DEVLINK_INFO_VERSION_FPGA_REV "fpga.rev"
>>> +#define EFX_DEVLINK_INFO_VERSION_DATAPATH_HW "fpga.app"
>>> +#define EFX_DEVLINK_INFO_VERSION_DATAPATH_FW DEVLINK_INFO_VERSION_GENERIC_FW_APP
>>> +#define EFX_DEVLINK_INFO_VERSION_SOC_BOOT "coproc.boot"
>>> +#define EFX_DEVLINK_INFO_VERSION_SOC_UBOOT "coproc.uboot"
>>> +#define EFX_DEVLINK_INFO_VERSION_SOC_MAIN "coproc.main"
>>> +#define EFX_DEVLINK_INFO_VERSION_SOC_RECOVERY "coproc.recovery"
>>> +#define EFX_DEVLINK_INFO_VERSION_FW_EXPROM "fw.exprom"
>>> +#define EFX_DEVLINK_INFO_VERSION_FW_UEFI "fw.uefi"
>>> +
>>> +#define EFX_MAX_VERSION_INFO_LEN 64
>>> +
>>> +static int efx_devlink_info_nvram_partition(struct efx_nic *efx,
>>> + struct devlink_info_req *req,
>>> + unsigned int partition_type,
>>> + const char *version_name)
>>> +{
>>> + char buf[EFX_MAX_VERSION_INFO_LEN];
>>> + u16 version[4];
>>> + int rc;
>>> +
>>> + rc = efx_mcdi_nvram_metadata(efx, partition_type, NULL, version, NULL,
>>> + 0);
>>> + if (rc)
>>> + return rc;
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u", version[0],
>>> + version[1], version[2], version[3]);
>>> + devlink_info_version_stored_put(req, version_name, buf);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static void efx_devlink_info_stored_versions(struct efx_nic *efx,
>>> + struct devlink_info_req *req)
>>> +{
>>> + efx_devlink_info_nvram_partition(efx, req, NVRAM_PARTITION_TYPE_BUNDLE,
>>> + DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID);
>>> + efx_devlink_info_nvram_partition(efx, req,
>>> + NVRAM_PARTITION_TYPE_MC_FIRMWARE,
>>> + DEVLINK_INFO_VERSION_GENERIC_FW_MGMT);
>>> + efx_devlink_info_nvram_partition(efx, req,
>>> + NVRAM_PARTITION_TYPE_SUC_FIRMWARE,
>>> + EFX_DEVLINK_INFO_VERSION_FW_MGMT_SUC);
>>> + efx_devlink_info_nvram_partition(efx, req,
>>> + NVRAM_PARTITION_TYPE_EXPANSION_ROM,
>>> + EFX_DEVLINK_INFO_VERSION_FW_EXPROM);
>>> + efx_devlink_info_nvram_partition(efx, req,
>>> + NVRAM_PARTITION_TYPE_EXPANSION_UEFI,
>>> + EFX_DEVLINK_INFO_VERSION_FW_UEFI);
>>> +}
>>> +
>>> +#define EFX_MAX_SERIALNUM_LEN (ETH_ALEN * 2 + 1)
>>> +
>>> +static void efx_devlink_info_board_cfg(struct efx_nic *efx,
>>> + struct devlink_info_req *req)
>>> +{
>>> + char sn[EFX_MAX_SERIALNUM_LEN];
>>> + u8 mac_address[ETH_ALEN];
>>> + int rc;
>>> +
>>> + rc = efx_mcdi_get_board_cfg(efx, (u8 *)mac_address, NULL, NULL);
>>> + if (!rc) {
>>> + snprintf(sn, EFX_MAX_SERIALNUM_LEN, "%pm", mac_address);
>>> + devlink_info_serial_number_put(req, sn);
>>> + }
>>> +}
>>> +
>>> +#define EFX_VER_FLAG(_f) \
>>> + (MC_CMD_GET_VERSION_V5_OUT_ ## _f ## _PRESENT_LBN)
>>> +
>>> +static void efx_devlink_info_running_versions(struct efx_nic *efx,
>>> + struct devlink_info_req *req)
>>> +{
>>> + MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_VERSION_V5_OUT_LEN);
>>> + MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_VERSION_EXT_IN_LEN);
>>> + char buf[EFX_MAX_VERSION_INFO_LEN];
>>> + unsigned int flags, build_id;
>>> + union {
>>> + const __le32 *dwords;
>>> + const __le16 *words;
>>> + const char *str;
>>> + } ver;
>>> + struct rtc_time build_date;
>>> + size_t outlength, offset;
>>> + u64 tstamp;
>>> + int rc;
>>> +
>>> + rc = efx_mcdi_rpc(efx, MC_CMD_GET_VERSION, inbuf, sizeof(inbuf),
>>> + outbuf, sizeof(outbuf), &outlength);
>>> + if (rc || outlength < MC_CMD_GET_VERSION_OUT_LEN)
>>> + return;
>>> +
>>> + /* Handle previous output */
>>> + if (outlength < MC_CMD_GET_VERSION_V2_OUT_LEN) {
>>> + ver.words = (__le16 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_EXT_OUT_VERSION);
>>> + offset = snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le16_to_cpu(ver.words[0]),
>>> + le16_to_cpu(ver.words[1]),
>>> + le16_to_cpu(ver.words[2]),
>>> + le16_to_cpu(ver.words[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_FW_MGMT,
>>> + buf);
>>> + return;
>>> + }
>>> +
>>> + /* Handle V2 additions */
>>> + flags = MCDI_DWORD(outbuf, GET_VERSION_V2_OUT_FLAGS);
>>> + if (flags & BIT(EFX_VER_FLAG(BOARD_EXT_INFO))) {
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%s",
>>> + MCDI_PTR(outbuf, GET_VERSION_V2_OUT_BOARD_NAME));
>>> + devlink_info_version_fixed_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,
>>> + buf);
>>> +
>>> + /* Favour full board version if present (in V5 or later) */
>>> + if (~flags & BIT(EFX_VER_FLAG(BOARD_VERSION))) {
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u",
>>> + MCDI_DWORD(outbuf,
>>> + GET_VERSION_V2_OUT_BOARD_REVISION));
>>> + devlink_info_version_fixed_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_BOARD_REV,
>>> + buf);
>>> + }
>>> +
>>> + ver.str = MCDI_PTR(outbuf, GET_VERSION_V2_OUT_BOARD_SERIAL);
>>> + if (ver.str[0])
>>> + devlink_info_board_serial_number_put(req, ver.str);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(FPGA_EXT_INFO))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V2_OUT_FPGA_VERSION);
>>> + offset = snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u_%c%u",
>>> + le32_to_cpu(ver.dwords[0]),
>>> + 'A' + le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]));
>>> +
>>> + ver.str = MCDI_PTR(outbuf, GET_VERSION_V2_OUT_FPGA_EXTRA);
>>> + if (ver.str[0])
>>> + snprintf(&buf[offset], EFX_MAX_VERSION_INFO_LEN - offset,
>>> + " (%s)", ver.str);
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_FPGA_REV,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(CMC_EXT_INFO))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V2_OUT_CMCFW_VERSION);
>>> + offset = snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]),
>>> + le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + tstamp = MCDI_QWORD(outbuf,
>>> + GET_VERSION_V2_OUT_CMCFW_BUILD_DATE);
>>> + if (tstamp) {
>>> + rtc_time64_to_tm(tstamp, &build_date);
>>> + snprintf(&buf[offset], EFX_MAX_VERSION_INFO_LEN - offset,
>>> + " (%ptRd)", &build_date);
>>> + }
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_FW_MGMT_CMC,
>>> + buf);
>>> + }
>>> +
>>> + ver.words = (__le16 *)MCDI_PTR(outbuf, GET_VERSION_V2_OUT_VERSION);
>>> + offset = snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le16_to_cpu(ver.words[0]), le16_to_cpu(ver.words[1]),
>>> + le16_to_cpu(ver.words[2]), le16_to_cpu(ver.words[3]));
>>> + if (flags & BIT(EFX_VER_FLAG(MCFW_EXT_INFO))) {
>>> + build_id = MCDI_DWORD(outbuf, GET_VERSION_V2_OUT_MCFW_BUILD_ID);
>>> + snprintf(&buf[offset], EFX_MAX_VERSION_INFO_LEN - offset,
>>> + " (%x) %s", build_id,
>>> + MCDI_PTR(outbuf, GET_VERSION_V2_OUT_MCFW_BUILD_NAME));
>>> + }
>>> + devlink_info_version_running_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_FW_MGMT,
>>> + buf);
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(SUCFW_EXT_INFO))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V2_OUT_SUCFW_VERSION);
>>> + tstamp = MCDI_QWORD(outbuf,
>>> + GET_VERSION_V2_OUT_SUCFW_BUILD_DATE);
>>> + rtc_time64_to_tm(tstamp, &build_date);
>>> + build_id = MCDI_DWORD(outbuf, GET_VERSION_V2_OUT_SUCFW_CHIP_ID);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN,
>>> + "%u.%u.%u.%u type %x (%ptRd)",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]), le32_to_cpu(ver.dwords[3]),
>>> + build_id, &build_date);
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_FW_MGMT_SUC,
>>> + buf);
>>> + }
>>> +
>>> + if (outlength < MC_CMD_GET_VERSION_V3_OUT_LEN)
>>> + return;
>>> +
>>> + /* Handle V3 additions */
>>> + if (flags & BIT(EFX_VER_FLAG(DATAPATH_HW_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V3_OUT_DATAPATH_HW_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_DATAPATH_HW,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(DATAPATH_FW_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V3_OUT_DATAPATH_FW_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_DATAPATH_FW,
>>> + buf);
>>> + }
>>> +
>>> + if (outlength < MC_CMD_GET_VERSION_V4_OUT_LEN)
>>> + return;
>>> +
>>> + /* Handle V4 additions */
>>> + if (flags & BIT(EFX_VER_FLAG(SOC_BOOT_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V4_OUT_SOC_BOOT_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_SOC_BOOT,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(SOC_UBOOT_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V4_OUT_SOC_UBOOT_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_SOC_UBOOT,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(SOC_MAIN_ROOTFS_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V4_OUT_SOC_MAIN_ROOTFS_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_SOC_MAIN,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(SOC_RECOVERY_BUILDROOT_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V4_OUT_SOC_RECOVERY_BUILDROOT_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_SOC_RECOVERY,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(SUCFW_VERSION)) &&
>>> + ~flags & BIT(EFX_VER_FLAG(SUCFW_EXT_INFO))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V4_OUT_SUCFW_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + EFX_DEVLINK_INFO_VERSION_FW_MGMT_SUC,
>>> + buf);
>>> + }
>>> +
>>> + if (outlength < MC_CMD_GET_VERSION_V5_OUT_LEN)
>>> + return;
>>> +
>>> + /* Handle V5 additions */
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(BOARD_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V5_OUT_BOARD_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_BOARD_REV,
>>> + buf);
>>> + }
>>> +
>>> + if (flags & BIT(EFX_VER_FLAG(BUNDLE_VERSION))) {
>>> + ver.dwords = (__le32 *)MCDI_PTR(outbuf,
>>> + GET_VERSION_V5_OUT_BUNDLE_VERSION);
>>> +
>>> + snprintf(buf, EFX_MAX_VERSION_INFO_LEN, "%u.%u.%u.%u",
>>> + le32_to_cpu(ver.dwords[0]), le32_to_cpu(ver.dwords[1]),
>>> + le32_to_cpu(ver.dwords[2]),
>>> + le32_to_cpu(ver.dwords[3]));
>>> +
>>> + devlink_info_version_running_put(req,
>>> + DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID,
>>> + buf);
>>> + }
>>> +}
>>> +
>>> +#undef EFX_VER_FLAG
>>> +
>>> +static void efx_devlink_info_query_all(struct efx_nic *efx,
>>> + struct devlink_info_req *req)
>>> +{
>>> + efx_devlink_info_board_cfg(efx, req);
>>> + efx_devlink_info_stored_versions(efx, req);
>>> + efx_devlink_info_running_versions(efx, req);
>>> +}
>>> +
>>> +struct efx_devlink {
>>> + struct efx_nic *efx;
>>> +};
>>> +
>>> +static int efx_devlink_info_get(struct devlink *devlink,
>>> + struct devlink_info_req *req,
>>> + struct netlink_ext_ack *extack)
>>> +{
>>> + struct efx_devlink *devlink_private = devlink_priv(devlink);
>>> + struct efx_nic *efx = devlink_private->efx;
>>> +
>>> + efx_devlink_info_query_all(efx, req);
>> I don't understand the reason for having efx_devlink_info_query_all() as
>> a separate function in compare to inline its code here.
>>
>
>Yes, it could be do as you say. I'll do.
>
>Thanks
>
>>> + return 0;
>>> +}
>>> +
>>> +static const struct devlink_ops sfc_devlink_ops = {
>>> + .info_get = efx_devlink_info_get,
>>> +};
>>> +
>>> +void efx_fini_devlink(struct efx_nic *efx)
>>> +{
>>> + if (efx->devlink) {
>>> + struct efx_devlink *devlink_private;
>>> +
>>> + devlink_private = devlink_priv(efx->devlink);
>>> +
>>> + devlink_unregister(efx->devlink);
>>> + devlink_free(efx->devlink);
>>> + efx->devlink = NULL;
>>> + }
>>> +}
>>> +
>>> +int efx_probe_devlink(struct efx_nic *efx)
>>> +{
>>> + struct efx_devlink *devlink_private;
>>> +
>>> + efx->devlink = devlink_alloc(&sfc_devlink_ops,
>>> + sizeof(struct efx_devlink),
>>> + &efx->pci_dev->dev);
>>> + if (!efx->devlink)
>>> + return -ENOMEM;
>>> + devlink_private = devlink_priv(efx->devlink);
>>> + devlink_private->efx = efx;
>>> +
>>> + devlink_register(efx->devlink);
>>> +
>>> + return 0;
>>> +}
>>> diff --git a/drivers/net/ethernet/sfc/efx_devlink.h b/drivers/net/ethernet/sfc/efx_devlink.h
>>> new file mode 100644
>>> index 000000000000..997f878aea93
>>> --- /dev/null
>>> +++ b/drivers/net/ethernet/sfc/efx_devlink.h
>>> @@ -0,0 +1,20 @@
>>> +/* SPDX-License-Identifier: GPL-2.0-only */
>>> +/****************************************************************************
>>> + * Driver for AMD network controllers and boards
>>> + * Copyright (C) 2023, Advanced Micro Devices, Inc.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify it
>>> + * under the terms of the GNU General Public License version 2 as published
>>> + * by the Free Software Foundation, incorporated herein by reference.
>>> + */
>>> +
>>> +#ifndef _EFX_DEVLINK_H
>>> +#define _EFX_DEVLINK_H
>>> +
>>> +#include "net_driver.h"
>>> +#include <net/devlink.h>
>>> +
>>> +int efx_probe_devlink(struct efx_nic *efx);
>>> +void efx_fini_devlink(struct efx_nic *efx);
>>> +
>>> +#endif /* _EFX_DEVLINK_H */
>>> diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
>>> index af338208eae9..328cae82a7d8 100644
>>> --- a/drivers/net/ethernet/sfc/mcdi.c
>>> +++ b/drivers/net/ethernet/sfc/mcdi.c
>>> @@ -2308,6 +2308,78 @@ static int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)
>>> return rc;
>>> }
>>>
>>> +int efx_mcdi_nvram_metadata(struct efx_nic *efx, unsigned int type,
>>> + u32 *subtype, u16 version[4], char *desc,
>>> + size_t descsize)
>>> +{
>>> + MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_METADATA_IN_LEN);
>>> + efx_dword_t *outbuf;
>>> + size_t outlen;
>>> + u32 flags;
>>> + int rc;
>>> +
>>> + outbuf = kzalloc(MC_CMD_NVRAM_METADATA_OUT_LENMAX_MCDI2, GFP_KERNEL);
>>> + if (!outbuf)
>>> + return -ENOMEM;
>>> +
>>> + MCDI_SET_DWORD(inbuf, NVRAM_METADATA_IN_TYPE, type);
>>> +
>>> + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_NVRAM_METADATA, inbuf,
>>> + sizeof(inbuf), outbuf,
>>> + MC_CMD_NVRAM_METADATA_OUT_LENMAX_MCDI2,
>>> + &outlen);
>>> + if (rc)
>>> + goto out_free;
>>> + if (outlen < MC_CMD_NVRAM_METADATA_OUT_LENMIN) {
>>> + rc = -EIO;
>>> + goto out_free;
>>> + }
>>> +
>>> + flags = MCDI_DWORD(outbuf, NVRAM_METADATA_OUT_FLAGS);
>>> +
>>> + if (desc && descsize > 0) {
>>> + if (flags & BIT(MC_CMD_NVRAM_METADATA_OUT_DESCRIPTION_VALID_LBN)) {
>>> + if (descsize <=
>>> + MC_CMD_NVRAM_METADATA_OUT_DESCRIPTION_NUM(outlen)) {
>>> + rc = -E2BIG;
>>> + goto out_free;
>>> + }
>>> +
>>> + strncpy(desc,
>>> + MCDI_PTR(outbuf, NVRAM_METADATA_OUT_DESCRIPTION),
>>> + MC_CMD_NVRAM_METADATA_OUT_DESCRIPTION_NUM(outlen));
>>> + desc[MC_CMD_NVRAM_METADATA_OUT_DESCRIPTION_NUM(outlen)] = '\0';
>>> + } else {
>>> + desc[0] = '\0';
>>> + }
>>> + }
>>> +
>>> + if (subtype) {
>>> + if (flags & BIT(MC_CMD_NVRAM_METADATA_OUT_SUBTYPE_VALID_LBN))
>>> + *subtype = MCDI_DWORD(outbuf, NVRAM_METADATA_OUT_SUBTYPE);
>>> + else
>>> + *subtype = 0;
>>> + }
>>> +
>>> + if (version) {
>>> + if (flags & BIT(MC_CMD_NVRAM_METADATA_OUT_VERSION_VALID_LBN)) {
>>> + version[0] = MCDI_WORD(outbuf, NVRAM_METADATA_OUT_VERSION_W);
>>> + version[1] = MCDI_WORD(outbuf, NVRAM_METADATA_OUT_VERSION_X);
>>> + version[2] = MCDI_WORD(outbuf, NVRAM_METADATA_OUT_VERSION_Y);
>>> + version[3] = MCDI_WORD(outbuf, NVRAM_METADATA_OUT_VERSION_Z);
>>> + } else {
>>> + version[0] = 0;
>>> + version[1] = 0;
>>> + version[2] = 0;
>>> + version[3] = 0;
>>> + }
>>> + }
>>> +
>>> +out_free:
>>> + kfree(outbuf);
>>> + return rc;
>>> +}
>>> +
>>> int efx_mcdi_mtd_read(struct mtd_info *mtd, loff_t start,
>>> size_t len, size_t *retlen, u8 *buffer)
>>> {
>>> diff --git a/drivers/net/ethernet/sfc/mcdi.h b/drivers/net/ethernet/sfc/mcdi.h
>>> index 7e35fec9da35..63b090587f7a 100644
>>> --- a/drivers/net/ethernet/sfc/mcdi.h
>>> +++ b/drivers/net/ethernet/sfc/mcdi.h
>>> @@ -379,6 +379,9 @@ int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
>>> bool *protected_out);
>>> int efx_new_mcdi_nvram_test_all(struct efx_nic *efx);
>>> int efx_mcdi_nvram_test_all(struct efx_nic *efx);
>>> +int efx_mcdi_nvram_metadata(struct efx_nic *efx, unsigned int type,
>>> + u32 *subtype, u16 version[4], char *desc,
>>> + size_t descsize);
>>> int efx_mcdi_handle_assertion(struct efx_nic *efx);
>>> int efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
>>> int efx_mcdi_wol_filter_set_magic(struct efx_nic *efx, const u8 *mac,
>>> diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
>>> index 3b49e216768b..d036641dc043 100644
>>> --- a/drivers/net/ethernet/sfc/net_driver.h
>>> +++ b/drivers/net/ethernet/sfc/net_driver.h
>>> @@ -994,6 +994,7 @@ enum efx_xdp_tx_queues_mode {
>>> * xdp_rxq_info structures?
>>> * @netdev_notifier: Netdevice notifier.
>>> * @tc: state for TC offload (EF100).
>>> + * @devlink: reference to devlink structure owned by this device
>>> * @mem_bar: The BAR that is mapped into membase.
>>> * @reg_base: Offset from the start of the bar to the function control window.
>>> * @monitor_work: Hardware monitor workitem
>>> @@ -1179,6 +1180,7 @@ struct efx_nic {
>>> struct notifier_block netdev_notifier;
>>> struct efx_tc_state *tc;
>>>
>>> + struct devlink *devlink;
>>> unsigned int mem_bar;
>>> u32 reg_base;
>>>
>>> --
>>> 2.17.1
>>>
>
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