bnxt_en: Refactor bnxt_hwrm_nvm_req()

JIRA: https://issues.redhat.com/browse/RHEL-76565

commit ed82740
Author: Michael Chan <michael.chan@broadcom.com>
Date:   Mon Mar 10 11:31:24 2025 -0700

    bnxt_en: Refactor bnxt_hwrm_nvm_req()

    bnxt_hwrm_nvm_req() first searches the nvm_params[] array for the
    NVM parameter to set or get.  The array entry contains all the
    NVM information about that parameter.  The information is then used
    to send the FW message to set or get the parameter.

    Refactor it to only do the array search in bnxt_hwrm_nvm_req() and
    pass the array entry to the new function __bnxt_hwrm_nvm_req() to
    send the FW message.  The next patch will be able to use the new
    function.

    Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
    Signed-off-by: Michael Chan <michael.chan@broadcom.com>
    Link: https://patch.msgid.link/20250310183129.3154117-3-michael.chan@broadcom.com
    Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
    Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Signed-off-by: Shruti Parab <shruti.parab@broadcom.com>

Author: Shruti Parab

drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c

@@ -1010,37 +1010,19 @@ static int bnxt_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
 
 }
 
-static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
-			     union devlink_param_value *val)
+static int __bnxt_hwrm_nvm_req(struct bnxt *bp,
+			       const struct bnxt_dl_nvm_param *nvm, void *msg,
+			       union devlink_param_value *val)
 {
 	struct hwrm_nvm_get_variable_input *req = msg;
-	struct bnxt_dl_nvm_param nvm_param;
 	struct hwrm_err_output *resp;
 	union bnxt_nvm_data *data;
 	dma_addr_t data_dma_addr;
-	int idx = 0, rc, i;
-
-	/* Get/Set NVM CFG parameter is supported only on PFs */
-	if (BNXT_VF(bp)) {
-		hwrm_req_drop(bp, req);
-		return -EPERM;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(nvm_params); i++) {
-		if (nvm_params[i].id == param_id) {
-			nvm_param = nvm_params[i];
-			break;
-		}
-	}
-
-	if (i == ARRAY_SIZE(nvm_params)) {
-		hwrm_req_drop(bp, req);
-		return -EOPNOTSUPP;
-	}
+	int idx = 0, rc;
 
-	if (nvm_param.dir_type == BNXT_NVM_PORT_CFG)
+	if (nvm->dir_type == BNXT_NVM_PORT_CFG)
 		idx = bp->pf.port_id;
-	else if (nvm_param.dir_type == BNXT_NVM_FUNC_CFG)
+	else if (nvm->dir_type == BNXT_NVM_FUNC_CFG)
 		idx = bp->pf.fw_fid - BNXT_FIRST_PF_FID;
 
 	data = hwrm_req_dma_slice(bp, req, sizeof(*data), &data_dma_addr);
@@ -1051,23 +1033,23 @@ static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
 	}
 
 	req->dest_data_addr = cpu_to_le64(data_dma_addr);
-	req->data_len = cpu_to_le16(nvm_param.nvm_num_bits);
-	req->option_num = cpu_to_le16(nvm_param.offset);
+	req->data_len = cpu_to_le16(nvm->nvm_num_bits);
+	req->option_num = cpu_to_le16(nvm->offset);
 	req->index_0 = cpu_to_le16(idx);
 	if (idx)
 		req->dimensions = cpu_to_le16(1);
 
 	resp = hwrm_req_hold(bp, req);
 	if (req->req_type == cpu_to_le16(HWRM_NVM_SET_VARIABLE)) {
-		bnxt_copy_to_nvm_data(data, val, nvm_param.nvm_num_bits,
-				      nvm_param.dl_num_bytes);
+		bnxt_copy_to_nvm_data(data, val, nvm->nvm_num_bits,
+				      nvm->dl_num_bytes);
 		rc = hwrm_req_send(bp, msg);
 	} else {
 		rc = hwrm_req_send_silent(bp, msg);
 		if (!rc) {
 			bnxt_copy_from_nvm_data(val, data,
-						nvm_param.nvm_num_bits,
-						nvm_param.dl_num_bytes);
+						nvm->nvm_num_bits,
+						nvm->dl_num_bytes);
 		} else {
 			if (resp->cmd_err ==
 				NVM_GET_VARIABLE_CMD_ERR_CODE_VAR_NOT_EXIST)
@@ -1080,6 +1062,27 @@ static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
 	return rc;
 }
 
+static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
+			     union devlink_param_value *val)
+{
+	struct hwrm_nvm_get_variable_input *req = msg;
+	const struct bnxt_dl_nvm_param *nvm_param;
+	int i;
+
+	/* Get/Set NVM CFG parameter is supported only on PFs */
+	if (BNXT_VF(bp)) {
+		hwrm_req_drop(bp, req);
+		return -EPERM;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nvm_params); i++) {
+		nvm_param = &nvm_params[i];
+		if (nvm_param->id == param_id)
+			return __bnxt_hwrm_nvm_req(bp, nvm_param, msg, val);
+	}
+	return -EOPNOTSUPP;
+}
+
 static int bnxt_dl_nvm_param_get(struct devlink *dl, u32 id,
 				 struct devlink_param_gset_ctx *ctx)
 {