crypto: octeontx2 - parameters for custom engine groups

Added devlink parameters to create and delete custom CPT engine groups.

Example:
devlink dev param set pci/0002:20:00.0 name egrp_create value \
                "se:32;se.out" cmode runtime
devlink dev param set pci/0002:20:00.0 name egrp_delete value \
                "egrp:1" cmode runtime

Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/marvell/octeontx2/Makefile

@@ -3,7 +3,7 @@ obj-$(CONFIG_CRYPTO_DEV_OCTEONTX2_CPT) += rvu_cptpf.o rvu_cptvf.o
 
 rvu_cptpf-objs := otx2_cptpf_main.o otx2_cptpf_mbox.o \
 		  otx2_cpt_mbox_common.o otx2_cptpf_ucode.o otx2_cptlf.o \
-		  cn10k_cpt.o
+		  cn10k_cpt.o otx2_cpt_devlink.o
 rvu_cptvf-objs := otx2_cptvf_main.o otx2_cptvf_mbox.o otx2_cptlf.o \
 		  otx2_cpt_mbox_common.o otx2_cptvf_reqmgr.o \
 		  otx2_cptvf_algs.o cn10k_cpt.o

drivers/crypto/marvell/octeontx2/otx2_cpt_common.h

@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/crypto.h>
+#include <net/devlink.h>
 #include "otx2_cpt_hw_types.h"
 #include "rvu.h"
 #include "mbox.h"

drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c

@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2021 Marvell. */
+
+#include "otx2_cpt_devlink.h"
+
+static int otx2_cpt_dl_egrp_create(struct devlink *dl, u32 id,
+				   struct devlink_param_gset_ctx *ctx)
+{
+	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
+	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
+
+	return otx2_cpt_dl_custom_egrp_create(cptpf, ctx);
+}
+
+static int otx2_cpt_dl_egrp_delete(struct devlink *dl, u32 id,
+				   struct devlink_param_gset_ctx *ctx)
+{
+	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
+	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
+
+	return otx2_cpt_dl_custom_egrp_delete(cptpf, ctx);
+}
+
+static int otx2_cpt_dl_uc_info(struct devlink *dl, u32 id,
+			       struct devlink_param_gset_ctx *ctx)
+{
+	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
+	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
+
+	otx2_cpt_print_uc_dbg_info(cptpf);
+
+	return 0;
+}
+
+enum otx2_cpt_dl_param_id {
+	OTX2_CPT_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
+	OTX2_CPT_DEVLINK_PARAM_ID_EGRP_CREATE,
+	OTX2_CPT_DEVLINK_PARAM_ID_EGRP_DELETE,
+};
+
+static const struct devlink_param otx2_cpt_dl_params[] = {
+	DEVLINK_PARAM_DRIVER(OTX2_CPT_DEVLINK_PARAM_ID_EGRP_CREATE,
+			     "egrp_create", DEVLINK_PARAM_TYPE_STRING,
+			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
+			     otx2_cpt_dl_uc_info, otx2_cpt_dl_egrp_create,
+			     NULL),
+	DEVLINK_PARAM_DRIVER(OTX2_CPT_DEVLINK_PARAM_ID_EGRP_DELETE,
+			     "egrp_delete", DEVLINK_PARAM_TYPE_STRING,
+			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
+			     otx2_cpt_dl_uc_info, otx2_cpt_dl_egrp_delete,
+			     NULL),
+};
+
+static int otx2_cpt_devlink_info_get(struct devlink *devlink,
+				     struct devlink_info_req *req,
+				     struct netlink_ext_ack *extack)
+{
+	return devlink_info_driver_name_put(req, "rvu_cptpf");
+}
+
+static const struct devlink_ops otx2_cpt_devlink_ops = {
+	.info_get = otx2_cpt_devlink_info_get,
+};
+
+int otx2_cpt_register_dl(struct otx2_cptpf_dev *cptpf)
+{
+	struct device *dev = &cptpf->pdev->dev;
+	struct otx2_cpt_devlink *cpt_dl;
+	struct devlink *dl;
+	int ret;
+
+	dl = devlink_alloc(&otx2_cpt_devlink_ops,
+			   sizeof(struct otx2_cpt_devlink), dev);
+	if (!dl) {
+		dev_warn(dev, "devlink_alloc failed\n");
+		return -ENOMEM;
+	}
+
+	cpt_dl = devlink_priv(dl);
+	cpt_dl->dl = dl;
+	cpt_dl->cptpf = cptpf;
+	cptpf->dl = dl;
+	ret = devlink_params_register(dl, otx2_cpt_dl_params,
+				      ARRAY_SIZE(otx2_cpt_dl_params));
+	if (ret) {
+		dev_err(dev, "devlink params register failed with error %d",
+			ret);
+		devlink_free(dl);
+		return ret;
+	}
+
+	devlink_register(dl);
+
+	return 0;
+}
+
+void otx2_cpt_unregister_dl(struct otx2_cptpf_dev *cptpf)
+{
+	struct devlink *dl = cptpf->dl;
+
+	if (!dl)
+		return;
+
+	devlink_unregister(dl);
+	devlink_params_unregister(dl, otx2_cpt_dl_params,
+				  ARRAY_SIZE(otx2_cpt_dl_params));
+	devlink_free(dl);
+}

drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ * Copyright (C) 2021 Marvell.
+ */
+
+#ifndef __OTX2_CPT_DEVLINK_H
+#define __OTX2_CPT_DEVLINK_H
+
+#include "otx2_cpt_common.h"
+#include "otx2_cptpf.h"
+
+struct otx2_cpt_devlink {
+	struct devlink *dl;
+	struct otx2_cptpf_dev *cptpf;
+};
+
+/* Devlink APIs */
+int otx2_cpt_register_dl(struct otx2_cptpf_dev *cptpf);
+void otx2_cpt_unregister_dl(struct otx2_cptpf_dev *cptpf);
+
+#endif /* __OTX2_CPT_DEVLINK_H */

drivers/crypto/marvell/octeontx2/otx2_cptpf.h

@@ -53,6 +53,9 @@ struct otx2_cptpf_dev {
 	u8 enabled_vfs;		/* Number of enabled VFs */
 	u8 kvf_limits;		/* Kernel crypto limits */
 	bool has_cpt1;
+
+	/* Devlink */
+	struct devlink *dl;
 };
 
 irqreturn_t otx2_cptpf_afpf_mbox_intr(int irq, void *arg);

drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c

@@ -4,6 +4,7 @@
 #include <linux/firmware.h>
 #include "otx2_cpt_hw_types.h"
 #include "otx2_cpt_common.h"
+#include "otx2_cpt_devlink.h"
 #include "otx2_cptpf_ucode.h"
 #include "otx2_cptpf.h"
 #include "cn10k_cpt.h"
@@ -766,8 +767,15 @@ static int otx2_cptpf_probe(struct pci_dev *pdev,
 	err = sysfs_create_group(&dev->kobj, &cptpf_sysfs_group);
 	if (err)
 		goto cleanup_eng_grps;
+
+	err = otx2_cpt_register_dl(cptpf);
+	if (err)
+		goto sysfs_grp_del;
+
 	return 0;
 
+sysfs_grp_del:
+	sysfs_remove_group(&dev->kobj, &cptpf_sysfs_group);
 cleanup_eng_grps:
 	otx2_cpt_cleanup_eng_grps(pdev, &cptpf->eng_grps);
 unregister_intr:
@@ -787,6 +795,7 @@ static void otx2_cptpf_remove(struct pci_dev *pdev)
 		return;
 
 	cptpf_sriov_disable(pdev);
+	otx2_cpt_unregister_dl(cptpf);
 	/* Delete sysfs entry created for kernel VF limits */
 	sysfs_remove_group(&pdev->dev.kobj, &cptpf_sysfs_group);
 	/* Cleanup engine groups */