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Subject[net-next PATCH 1/3] octeontx2-af: Add devlink suppoort to af driver
Date
Add devlink support to AF driver. Basic devlink support is added.
Currently info_get is the only supported devlink ops.

devlink ouptput looks like this
# devlink dev
pci/0002:01:00.0
# devlink dev info
pci/0002:01:00.0:
driver octeontx2-af
versions:
fixed:
mbox version: 9

Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
---
.../net/ethernet/marvell/octeontx2/Kconfig | 1 +
.../ethernet/marvell/octeontx2/af/Makefile | 3 +-
.../net/ethernet/marvell/octeontx2/af/rvu.c | 9 ++-
.../net/ethernet/marvell/octeontx2/af/rvu.h | 5 +-
.../marvell/octeontx2/af/rvu_devlink.c | 69 +++++++++++++++++++
.../marvell/octeontx2/af/rvu_devlink.h | 20 ++++++
6 files changed, 104 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
create mode 100644 drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.h

diff --git a/drivers/net/ethernet/marvell/octeontx2/Kconfig b/drivers/net/ethernet/marvell/octeontx2/Kconfig
index 543a1d047567..16caa02095fe 100644
--- a/drivers/net/ethernet/marvell/octeontx2/Kconfig
+++ b/drivers/net/ethernet/marvell/octeontx2/Kconfig
@@ -9,6 +9,7 @@ config OCTEONTX2_MBOX
config OCTEONTX2_AF
tristate "Marvell OcteonTX2 RVU Admin Function driver"
select OCTEONTX2_MBOX
+ select NET_DEVLINK
depends on (64BIT && COMPILE_TEST) || ARM64
depends on PCI
help
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/Makefile b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
index 2f7a861d0c7b..20135f1d3387 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/Makefile
+++ b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
@@ -9,4 +9,5 @@ obj-$(CONFIG_OCTEONTX2_AF) += octeontx2_af.o

octeontx2_mbox-y := mbox.o rvu_trace.o
octeontx2_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o \
- rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o
+ rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o \
+ rvu_devlink.o
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index a28a518c0eae..58c48fa7aa72 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -2812,10 +2812,14 @@ static int rvu_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (err)
goto err_mbox;

- err = rvu_register_interrupts(rvu);
+ err = rvu_register_dl(rvu);
if (err)
goto err_flr;

+ err = rvu_register_interrupts(rvu);
+ if (err)
+ goto err_dl;
+
rvu_setup_rvum_blk_revid(rvu);

/* Enable AF's VFs (if any) */
@@ -2829,6 +2833,8 @@ static int rvu_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return 0;
err_irq:
rvu_unregister_interrupts(rvu);
+err_dl:
+ rvu_unregister_dl(rvu);
err_flr:
rvu_flr_wq_destroy(rvu);
err_mbox:
@@ -2858,6 +2864,7 @@ static void rvu_remove(struct pci_dev *pdev)

rvu_dbg_exit(rvu);
rvu_unregister_interrupts(rvu);
+ rvu_unregister_dl(rvu);
rvu_flr_wq_destroy(rvu);
rvu_cgx_exit(rvu);
rvu_fwdata_exit(rvu);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index 5ac9bb12415f..c112b299635d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -12,7 +12,10 @@
#define RVU_H

#include <linux/pci.h>
+#include <net/devlink.h>
+
#include "rvu_struct.h"
+#include "rvu_devlink.h"
#include "common.h"
#include "mbox.h"

@@ -372,10 +375,10 @@ struct rvu {
struct npc_kpu_profile_adapter kpu;

struct ptp *ptp;
-
#ifdef CONFIG_DEBUG_FS
struct rvu_debugfs rvu_dbg;
#endif
+ struct rvu_devlink *rvu_dl;
};

static inline void rvu_write64(struct rvu *rvu, u64 block, u64 offset, u64 val)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
new file mode 100644
index 000000000000..c9f5f66e6701
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell OcteonTx2 RVU Devlink
+ *
+ * Copyright (C) 2020 Marvell International Ltd.
+ *
+ */
+
+#include "rvu.h"
+
+#define DRV_NAME "octeontx2-af"
+
+static int rvu_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
+ struct netlink_ext_ack *extack)
+{
+ char buf[10];
+ int err;
+
+ err = devlink_info_driver_name_put(req, DRV_NAME);
+ if (err)
+ return err;
+
+ sprintf(buf, "%X", OTX2_MBOX_VERSION);
+ return devlink_info_version_fixed_put(req, "mbox version:", buf);
+}
+
+static const struct devlink_ops rvu_devlink_ops = {
+ .info_get = rvu_devlink_info_get,
+};
+
+int rvu_register_dl(struct rvu *rvu)
+{
+ struct rvu_devlink *rvu_dl;
+ struct devlink *dl;
+ int err;
+
+ rvu_dl = kzalloc(sizeof(*rvu_dl), GFP_KERNEL);
+ if (!rvu_dl)
+ return -ENOMEM;
+
+ dl = devlink_alloc(&rvu_devlink_ops, sizeof(struct rvu_devlink));
+ if (!dl) {
+ dev_warn(rvu->dev, "devlink_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ err = devlink_register(dl, rvu->dev);
+ if (err) {
+ dev_err(rvu->dev, "devlink register failed with error %d\n", err);
+ devlink_free(dl);
+ return err;
+ }
+
+ rvu_dl->dl = dl;
+ rvu_dl->rvu = rvu;
+ rvu->rvu_dl = rvu_dl;
+ return 0;
+}
+
+void rvu_unregister_dl(struct rvu *rvu)
+{
+ struct rvu_devlink *rvu_dl = rvu->rvu_dl;
+ struct devlink *dl = rvu_dl->dl;
+
+ if (!dl)
+ return;
+
+ devlink_unregister(dl);
+ devlink_free(dl);
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.h
new file mode 100644
index 000000000000..b0a0dfeb99c2
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Marvell OcteonTx2 RVU Devlink
+ *
+ * Copyright (C) 2020 Marvell International Ltd.
+ *
+ */
+
+#ifndef RVU_DEVLINK_H
+#define RVU_DEVLINK_H
+
+struct rvu_devlink {
+ struct devlink *dl;
+ struct rvu *rvu;
+};
+
+/* Devlink APIs */
+int rvu_register_dl(struct rvu *rvu);
+void rvu_unregister_dl(struct rvu *rvu);
+
+#endif /* RVU_DEVLINK_H */
--
2.25.1
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