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Date: Fri, 27 Jan 2023 09:36:45 +0000
From: <alejandro.lucero-palau@....com>
To: <netdev@...r.kernel.org>, <linux-net-drivers@....com>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
<edumazet@...gle.com>, <habetsm.xilinx@...il.com>,
<ecree.xilinx@...il.com>,
Alejandro Lucero <alejandro.lucero-palau@....com>
Subject: [PATCH v3 net-next 2/8] sfc: add devlink info support for ef100
From: Alejandro Lucero <alejandro.lucero-palau@....com>
Support for devlink info command.
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@....com>
---
Documentation/networking/devlink/sfc.rst | 57 ++++
drivers/net/ethernet/sfc/efx_devlink.c | 404 +++++++++++++++++++++++
drivers/net/ethernet/sfc/efx_devlink.h | 17 +
drivers/net/ethernet/sfc/mcdi.c | 72 ++++
drivers/net/ethernet/sfc/mcdi.h | 3 +
5 files changed, 553 insertions(+)
create mode 100644 Documentation/networking/devlink/sfc.rst
diff --git a/Documentation/networking/devlink/sfc.rst b/Documentation/networking/devlink/sfc.rst
new file mode 100644
index 000000000000..e2541a2f18ee
--- /dev/null
+++ b/Documentation/networking/devlink/sfc.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+===================
+sfc devlink support
+===================
+
+This document describes the devlink features implemented by the ``sfc``
+device driver for the ef100 device.
+
+Info versions
+=============
+
+The ``sfc`` driver reports the following versions
+
+.. list-table:: devlink info versions implemented
+ :widths: 5 5 90
+
+ * - Name
+ - Type
+ - Description
+ * - ``fw.mgmt.suc``
+ - running
+ - For boards where the management function is split between multiple
+ control units, this is the SUC control unit's firmware version.
+ * - ``fw.mgmt.cmc``
+ - running
+ - For boards where the management function is split between multiple
+ control units, this is the CMC control unit's firmware version.
+ * - ``fpga.rev``
+ - running
+ - FPGA design revision.
+ * - ``fpga.app``
+ - running
+ - Datapath programmable logic version.
+ * - ``fw.app``
+ - running
+ - Datapath software/microcode/firmware version.
+ * - ``coproc.boot``
+ - running
+ - SmartNIC application co-processor (APU) first stage boot loader version.
+ * - ``coproc.uboot``
+ - running
+ - SmartNIC application co-processor (APU) co-operating system loader version.
+ * - ``coproc.main``
+ - running
+ - SmartNIC application co-processor (APU) main operating system version.
+ * - ``coproc.recovery``
+ - running
+ - SmartNIC application co-processor (APU) recovery operating system version.
+ * - ``fw.exprom``
+ - running
+ - Expansion ROM version. For boards where the expansion ROM is split between
+ multiple images (e.g. PXE and UEFI), this is the specifically the PXE boot
+ ROM version.
+ * - ``fw.uefi``
+ - running
+ - UEFI driver version (No UNDI support).
diff --git a/drivers/net/ethernet/sfc/efx_devlink.c b/drivers/net/ethernet/sfc/efx_devlink.c
index fab06aaa4b8a..ff5adfe3905e 100644
--- a/drivers/net/ethernet/sfc/efx_devlink.c
+++ b/drivers/net/ethernet/sfc/efx_devlink.c
@@ -21,7 +21,411 @@ struct efx_devlink {
struct efx_nic *efx;
};
+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_VER_FLAG(_f) \
+ (MC_CMD_GET_VERSION_V5_OUT_ ## _f ## _PRESENT_LBN)
+
+static void efx_devlink_info_running_v2(struct efx_nic *efx,
+ struct devlink_info_req *req,
+ unsigned int flags, efx_dword_t *outbuf)
+{
+ char buf[EFX_MAX_VERSION_INFO_LEN];
+ union {
+ const __le32 *dwords;
+ const __le16 *words;
+ const char *str;
+ } ver;
+ struct rtc_time build_date;
+ unsigned int build_id;
+ size_t offset;
+ u64 tstamp;
+
+ 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);
+ }
+}
+
+static void efx_devlink_info_running_v3(struct efx_nic *efx,
+ struct devlink_info_req *req,
+ unsigned int flags, efx_dword_t *outbuf)
+{
+ char buf[EFX_MAX_VERSION_INFO_LEN];
+ union {
+ const __le32 *dwords;
+ const __le16 *words;
+ const char *str;
+ } ver;
+
+ 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);
+ }
+}
+
+static void efx_devlink_info_running_v4(struct efx_nic *efx,
+ struct devlink_info_req *req,
+ unsigned int flags, efx_dword_t *outbuf)
+{
+ char buf[EFX_MAX_VERSION_INFO_LEN];
+ union {
+ const __le32 *dwords;
+ const __le16 *words;
+ const char *str;
+ } ver;
+
+ 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);
+ }
+}
+
+static void efx_devlink_info_running_v5(struct efx_nic *efx,
+ struct devlink_info_req *req,
+ unsigned int flags, efx_dword_t *outbuf)
+{
+ char buf[EFX_MAX_VERSION_INFO_LEN];
+ union {
+ const __le32 *dwords;
+ const __le16 *words;
+ const char *str;
+ } ver;
+
+ 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);
+ }
+}
+
+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];
+ union {
+ const __le32 *dwords;
+ const __le16 *words;
+ const char *str;
+ } ver;
+ size_t outlength;
+ unsigned int flags;
+ 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);
+ 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);
+ efx_devlink_info_running_v2(efx, req, flags, outbuf);
+
+ if (outlength < MC_CMD_GET_VERSION_V3_OUT_LEN)
+ return;
+
+ /* Handle V3 additions */
+ efx_devlink_info_running_v3(efx, req, flags, outbuf);
+
+ if (outlength < MC_CMD_GET_VERSION_V4_OUT_LEN)
+ return;
+
+ /* Handle V4 additions */
+ efx_devlink_info_running_v4(efx, req, flags, outbuf);
+
+ if (outlength < MC_CMD_GET_VERSION_V5_OUT_LEN)
+ return;
+
+ /* Handle V5 additions */
+ efx_devlink_info_running_v5(efx, req, flags, outbuf);
+}
+
+#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);
+ }
+}
+
+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_board_cfg(efx, req);
+ efx_devlink_info_stored_versions(efx, req);
+ efx_devlink_info_running_versions(efx, req);
+ return 0;
+}
+
static const struct devlink_ops sfc_devlink_ops = {
+ .info_get = efx_devlink_info_get,
};
void efx_fini_devlink_start(struct efx_nic *efx)
diff --git a/drivers/net/ethernet/sfc/efx_devlink.h b/drivers/net/ethernet/sfc/efx_devlink.h
index 55d0d8aeca1e..8bcd077d8d8d 100644
--- a/drivers/net/ethernet/sfc/efx_devlink.h
+++ b/drivers/net/ethernet/sfc/efx_devlink.h
@@ -14,6 +14,23 @@
#include "net_driver.h"
#include <net/devlink.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
+
int efx_probe_devlink(struct efx_nic *efx);
void efx_probe_devlink_done(struct efx_nic *efx);
void efx_fini_devlink_start(struct efx_nic *efx);
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..5cb202684858 100644
--- a/drivers/net/ethernet/sfc/mcdi.h
+++ b/drivers/net/ethernet/sfc/mcdi.h
@@ -378,6 +378,9 @@ int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
size_t *size_out, size_t *erase_size_out,
bool *protected_out);
int efx_new_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_nvram_test_all(struct efx_nic *efx);
int efx_mcdi_handle_assertion(struct efx_nic *efx);
int efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
--
2.17.1
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