[RFC net-next v2 6/6] nfp: devlink: report the running and flashed versions

[Jakub Kicinski]

Report versions of firmware components using the new NSP command.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 .../net/ethernet/netronome/nfp/nfp_devlink.c  | 73 +++++++++++++++++++
 include/net/devlink.h                         |  7 ++
 2 files changed, 80 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c 
b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index 63b2fa37256c..e3d23724a37c 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -207,11 +207,54 @@ nfp_devlink_versions_get_hwinfo(struct nfp_pf *pf, struct 
devlink_info_req *req)
        return 0;
 }
 
+static const struct nfp_devlink_versions {
+       enum nfp_nsp_versions id;
+       const char *key;
+} nfp_devlink_versions_nsp[] = {
+       { NFP_VERSIONS_BSP,     DEVLINK_VERSION_GENERIC_FW_MGMT, },
+       { NFP_VERSIONS_CPLD,    "fw.cpld", },
+       { NFP_VERSIONS_APP,     DEVLINK_VERSION_GENERIC_FW_APP, },
+};
+
+static int
+nfp_devlink_versions_get_nsp(struct devlink_info_req *req, bool flash,
+                            const u8 *buf, unsigned int size)
+{
+       enum devlink_version_type type;
+       unsigned int i;
+       int err;
+
+       type = flash ? DEVLINK_VERSION_STORED : DEVLINK_VERSION_RUNNING;
+
+       for (i = 0; i < ARRAY_SIZE(nfp_devlink_versions_nsp); i++) {
+               const struct nfp_devlink_versions *info;
+               const char *version;
+
+               info = &nfp_devlink_versions_nsp[i];
+
+               version = nfp_nsp_versions_get(info->id, flash, buf, size);
+               if (IS_ERR(version)) {
+                       if (PTR_ERR(version) == -ENOENT)
+                               continue;
+                       else
+                               return PTR_ERR(version);
+               }
+
+               err = devlink_info_report_version(req, type,
+                                                 info->key, version);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
 static int
 nfp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
                     struct netlink_ext_ack *extack)
 {
        struct nfp_pf *pf = devlink_priv(devlink);
+       struct nfp_nsp *nsp;
        const char *sn;
        int err;
 
@@ -226,7 +269,37 @@ nfp_devlink_info_get(struct devlink *devlink, struct 
devlink_info_req *req,
                        return err;
        }
 
+       nsp = nfp_nsp_open(pf->cpp);
+       if (IS_ERR(nsp)) {
+               NL_SET_ERR_MSG_MOD(extack, "can't access NSP");
+               return PTR_ERR(nsp);
+       }
+
+       if (nfp_nsp_has_versions(nsp)) {
+               char buf[512] = {};
+
+               err = nfp_nsp_versions(nsp, buf, sizeof(buf));
+               if (err)
+                       goto err_close_nsp;
+
+               err = nfp_devlink_versions_get_nsp(req, false,
+                                                  buf, sizeof(buf));
+               if (err)
+                       goto err_close_nsp;
+
+               err = nfp_devlink_versions_get_nsp(req, true,
+                                                  buf, sizeof(buf));
+               if (err)
+                       goto err_close_nsp;
+       }
+
+       nfp_nsp_close(nsp);
+
        return nfp_devlink_versions_get_hwinfo(pf, req);
+
+err_close_nsp:
+       nfp_nsp_close(nsp);
+       return err;
 }
 
 const struct devlink_ops nfp_devlink_ops = {
diff --git a/include/net/devlink.h b/include/net/devlink.h
index dc08301028a9..9270f1a21f08 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -424,6 +424,13 @@ enum devlink_param_generic_id {
 /* Revision of board design */
 #define DEVLINK_VERSION_GENERIC_BOARD_REV      "board.rev"
 
+/* Control processor FW version, FW is responsible for house keeping tasks,
+ * PHY control etc.
+ */
+#define DEVLINK_VERSION_GENERIC_FW_MGMT                "fw.mgmt"
+/* Data path microcode controlling high-speed packet processing */
+#define DEVLINK_VERSION_GENERIC_FW_APP         "fw.app"
+
 enum devlink_version_type {
        DEVLINK_VERSION_FIXED,
        DEVLINK_VERSION_STORED,
-- 
2.19.2