From b311b001dea14555753c6c4f1f089689a18413bb Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 17 Sep 2020 18:13:25 -0700
Subject: netdevsim: devlink flash timeout message

Add a simple devlink flash timeout message to exercise
the message mechanism.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/netdevsim/dev.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 32f339fedb21..e41f85c75699 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -768,6 +768,8 @@ static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
 						   component,
 						   NSIM_DEV_FLASH_SIZE,
 						   NSIM_DEV_FLASH_SIZE);
+		devlink_flash_update_timeout_notify(devlink, "Flash select",
+						    component, 81);
 		devlink_flash_update_status_notify(devlink, "Flashing done",
 						   component, 0, 0);
 		devlink_flash_update_end_notify(devlink);
-- 
cgit v1.2.3


From d4602a9f47196dd62deba66ec361b5897f1ae62b Mon Sep 17 00:00:00 2001
From: Andrew Lunn <andrew@lunn.ch>
Date: Fri, 18 Sep 2020 21:11:02 +0200
Subject: net: devlink: region: Pass the region ops to the snapshot function

Pass the region to be snapshotted to the function performing the
snapshot. This allows one function to operate on numerous regions.

v4:
Add missing kerneldoc for ICE

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/intel/ice/ice_devlink.c | 4 ++++
 drivers/net/netdevsim/dev.c                  | 6 ++++--
 include/net/devlink.h                        | 4 +++-
 net/core/devlink.c                           | 2 +-
 4 files changed, 12 insertions(+), 4 deletions(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 111d6bfe4222..67d1190cb164 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -401,6 +401,7 @@ void ice_devlink_destroy_port(struct ice_pf *pf)
 /**
  * ice_devlink_nvm_snapshot - Capture a snapshot of the Shadow RAM contents
  * @devlink: the devlink instance
+ * @ops: the devlink region being snapshotted
  * @extack: extended ACK response structure
  * @data: on exit points to snapshot data buffer
  *
@@ -413,6 +414,7 @@ void ice_devlink_destroy_port(struct ice_pf *pf)
  * error code on failure.
  */
 static int ice_devlink_nvm_snapshot(struct devlink *devlink,
+				    const struct devlink_region_ops *ops,
 				    struct netlink_ext_ack *extack, u8 **data)
 {
 	struct ice_pf *pf = devlink_priv(devlink);
@@ -456,6 +458,7 @@ static int ice_devlink_nvm_snapshot(struct devlink *devlink,
 /**
  * ice_devlink_devcaps_snapshot - Capture snapshot of device capabilities
  * @devlink: the devlink instance
+ * @ops: the devlink region being snapshotted
  * @extack: extended ACK response structure
  * @data: on exit points to snapshot data buffer
  *
@@ -468,6 +471,7 @@ static int ice_devlink_nvm_snapshot(struct devlink *devlink,
  */
 static int
 ice_devlink_devcaps_snapshot(struct devlink *devlink,
+			     const struct devlink_region_ops *ops,
 			     struct netlink_ext_ack *extack, u8 **data)
 {
 	struct ice_pf *pf = devlink_priv(devlink);
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index e41f85c75699..e665efd760f8 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -40,7 +40,9 @@ static struct dentry *nsim_dev_ddir;
 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
 
 static int
-nsim_dev_take_snapshot(struct devlink *devlink, struct netlink_ext_ack *extack,
+nsim_dev_take_snapshot(struct devlink *devlink,
+		       const struct devlink_region_ops *ops,
+		       struct netlink_ext_ack *extack,
 		       u8 **data)
 {
 	void *dummy_data;
@@ -68,7 +70,7 @@ static ssize_t nsim_dev_take_snapshot_write(struct file *file,
 
 	devlink = priv_to_devlink(nsim_dev);
 
-	err = nsim_dev_take_snapshot(devlink, NULL, &dummy_data);
+	err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
 	if (err)
 		return err;
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index b68e483d9267..4883dbae7faf 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -566,7 +566,9 @@ struct devlink_info_req;
 struct devlink_region_ops {
 	const char *name;
 	void (*destructor)(const void *data);
-	int (*snapshot)(struct devlink *devlink, struct netlink_ext_ack *extack,
+	int (*snapshot)(struct devlink *devlink,
+			const struct devlink_region_ops *ops,
+			struct netlink_ext_ack *extack,
 			u8 **data);
 	void *priv;
 };
diff --git a/net/core/devlink.c b/net/core/devlink.c
index d5844761a177..045468390480 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4347,7 +4347,7 @@ devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
 		}
 	}
 
-	err = region->ops->snapshot(devlink, info->extack, &data);
+	err = region->ops->snapshot(devlink, region->ops, info->extack, &data);
 	if (err)
 		goto err_snapshot_capture;
 
-- 
cgit v1.2.3


From 22ec3d232f8511b21355fcdb6fb2a4eced3decd8 Mon Sep 17 00:00:00 2001
From: Jacob Keller <jacob.e.keller@intel.com>
Date: Fri, 25 Sep 2020 13:46:05 -0700
Subject: devlink: check flash_update parameter support in net core

When implementing .flash_update, drivers which do not support
per-component update are manually checking the component parameter to
verify that it is NULL. Without this check, the driver might accept an
update request with a component specified even though it will not honor
such a request.

Instead of having each driver check this, move the logic into
net/core/devlink.c, and use a new `supported_flash_update_params` field
in the devlink_ops. Drivers which will support per-component update must
now specify this by setting DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT in
the supported_flash_update_params in their devlink_ops.

This helps ensure that drivers do not forget to check for a NULL
component if they do not support per-component update. This also enables
a slightly better error message by enabling the core stack to set the
netlink bad attribute message to indicate precisely the unsupported
attribute in the message.

Going forward, any new additional parameter to flash update will require
a bit in the supported_flash_update_params bitfield.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Cc: Jiri Pirko <jiri@mellanox.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michael Chan <michael.chan@broadcom.com>
Cc: Bin Luo <luobin9@huawei.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Ido Schimmel <idosch@mellanox.com>
Cc: Danielle Ratson <danieller@mellanox.com>
Cc: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c   | 12 +++---------
 drivers/net/ethernet/huawei/hinic/hinic_devlink.c   |  3 ---
 drivers/net/ethernet/intel/ice/ice_devlink.c        |  9 ++-------
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c   |  3 ---
 drivers/net/ethernet/mellanox/mlxsw/core.c          |  3 ---
 drivers/net/ethernet/netronome/nfp/nfp_devlink.c    |  2 --
 drivers/net/ethernet/pensando/ionic/ionic_devlink.c |  3 ---
 drivers/net/netdevsim/dev.c                         |  1 +
 include/net/devlink.h                               | 15 +++++++++++++++
 net/core/devlink.c                                  | 15 +++++++++++++--
 10 files changed, 34 insertions(+), 32 deletions(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
index 3a854195d5b0..a17764db1419 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -23,9 +23,6 @@ bnxt_dl_flash_update(struct devlink *dl, const char *filename,
 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
 	int rc;
 
-	if (region)
-		return -EOPNOTSUPP;
-
 	if (!BNXT_PF(bp)) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "flash update not supported from a VF");
@@ -33,15 +30,12 @@ bnxt_dl_flash_update(struct devlink *dl, const char *filename,
 	}
 
 	devlink_flash_update_begin_notify(dl);
-	devlink_flash_update_status_notify(dl, "Preparing to flash", region, 0,
-					   0);
+	devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0);
 	rc = bnxt_flash_package_from_file(bp->dev, filename, 0);
 	if (!rc)
-		devlink_flash_update_status_notify(dl, "Flashing done", region,
-						   0, 0);
+		devlink_flash_update_status_notify(dl, "Flashing done", NULL, 0, 0);
 	else
-		devlink_flash_update_status_notify(dl, "Flashing failed",
-						   region, 0, 0);
+		devlink_flash_update_status_notify(dl, "Flashing failed", NULL, 0, 0);
 	devlink_flash_update_end_notify(dl);
 	return rc;
 }
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
index 16bda7381ba0..662a27a514ae 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
@@ -289,9 +289,6 @@ static int hinic_devlink_flash_update(struct devlink *devlink,
 	const struct firmware *fw;
 	int err;
 
-	if (component)
-		return -EOPNOTSUPP;
-
 	err = request_firmware_direct(&fw, file_name,
 				      &priv->hwdev->hwif->pdev->dev);
 	if (err)
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 67d1190cb164..4666f1d5a695 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -252,16 +252,12 @@ ice_devlink_flash_update(struct devlink *devlink, const char *path,
 	const struct firmware *fw;
 	int err;
 
-	/* individual component update is not yet supported */
-	if (component)
-		return -EOPNOTSUPP;
-
 	if (!hw->dev_caps.common_cap.nvm_unified_update) {
 		NL_SET_ERR_MSG_MOD(extack, "Current firmware does not support unified update");
 		return -EOPNOTSUPP;
 	}
 
-	err = ice_check_for_pending_update(pf, component, extack);
+	err = ice_check_for_pending_update(pf, NULL, extack);
 	if (err)
 		return err;
 
@@ -272,8 +268,7 @@ ice_devlink_flash_update(struct devlink *devlink, const char *path,
 	}
 
 	devlink_flash_update_begin_notify(devlink);
-	devlink_flash_update_status_notify(devlink, "Preparing to flash",
-					   component, 0, 0);
+	devlink_flash_update_status_notify(devlink, "Preparing to flash", NULL, 0, 0);
 	err = ice_flash_pldm_image(pf, fw, extack);
 	devlink_flash_update_end_notify(devlink);
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index c709e9a385f6..fccae4b802b6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -16,9 +16,6 @@ static int mlx5_devlink_flash_update(struct devlink *devlink,
 	const struct firmware *fw;
 	int err;
 
-	if (component)
-		return -EOPNOTSUPP;
-
 	err = request_firmware_direct(&fw, file_name, &dev->pdev->dev);
 	if (err)
 		return err;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 1bb21fe295b9..3ffd03ef9c0e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1108,9 +1108,6 @@ static int mlxsw_core_fw_flash_update(struct mlxsw_core *mlxsw_core,
 	const struct firmware *firmware;
 	int err;
 
-	if (component)
-		return -EOPNOTSUPP;
-
 	err = request_firmware_direct(&firmware, file_name, mlxsw_core->bus_info->dev);
 	if (err)
 		return err;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index be52510d446b..c93cb9a27e25 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -332,8 +332,6 @@ static int
 nfp_devlink_flash_update(struct devlink *devlink, const char *path,
 			 const char *component, struct netlink_ext_ack *extack)
 {
-	if (component)
-		return -EOPNOTSUPP;
 	return nfp_flash_update_common(devlink_priv(devlink), path, extack);
 }
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
index 5348f05ebc32..c125988b0954 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
@@ -16,9 +16,6 @@ static int ionic_dl_flash_update(struct devlink *dl,
 {
 	struct ionic *ionic = devlink_priv(dl);
 
-	if (component)
-		return -EOPNOTSUPP;
-
 	return ionic_firmware_update(ionic->lif, fwname, extack);
 }
 
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index e665efd760f8..424bdab8e888 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -879,6 +879,7 @@ nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
 }
 
 static const struct devlink_ops nsim_dev_devlink_ops = {
+	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT,
 	.reload_down = nsim_dev_reload_down,
 	.reload_up = nsim_dev_reload_up,
 	.info_get = nsim_dev_info_get,
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 4883dbae7faf..cec6b4f109fa 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -550,6 +550,8 @@ enum devlink_param_generic_id {
 /* Firmware bundle identifier */
 #define DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID	"fw.bundle_id"
 
+#define DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT	BIT(0)
+
 struct devlink_region;
 struct devlink_info_req;
 
@@ -1037,6 +1039,12 @@ enum devlink_trap_group_generic_id {
 	}
 
 struct devlink_ops {
+	/**
+	 * @supported_flash_update_params:
+	 * mask of parameters supported by the driver's .flash_update
+	 * implemementation.
+	 */
+	u32 supported_flash_update_params;
 	int (*reload_down)(struct devlink *devlink, bool netns_change,
 			   struct netlink_ext_ack *extack);
 	int (*reload_up)(struct devlink *devlink,
@@ -1097,6 +1105,13 @@ struct devlink_ops {
 				      struct netlink_ext_ack *extack);
 	int (*info_get)(struct devlink *devlink, struct devlink_info_req *req,
 			struct netlink_ext_ack *extack);
+	/**
+	 * @flash_update: Device flash update function
+	 *
+	 * Used to perform a flash update for the device. The set of
+	 * parameters supported by the driver should be set in
+	 * supported_flash_update_params.
+	 */
 	int (*flash_update)(struct devlink *devlink, const char *file_name,
 			    const char *component,
 			    struct netlink_ext_ack *extack);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index ac32b672a04b..7c69a41016a2 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3148,18 +3148,29 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 				       struct genl_info *info)
 {
 	struct devlink *devlink = info->user_ptr[0];
-	const char *file_name, *component;
+	const char *file_name, *component = NULL;
 	struct nlattr *nla_component;
+	u32 supported_params;
 
 	if (!devlink->ops->flash_update)
 		return -EOPNOTSUPP;
 
 	if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
 		return -EINVAL;
+
+	supported_params = devlink->ops->supported_flash_update_params;
+
 	file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
 
 	nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
-	component = nla_component ? nla_data(nla_component) : NULL;
+	if (nla_component) {
+		if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) {
+			NL_SET_ERR_MSG_ATTR(info->extack, nla_component,
+					    "component update is not supported by this device");
+			return -EOPNOTSUPP;
+		}
+		component = nla_data(nla_component);
+	}
 
 	return devlink->ops->flash_update(devlink, file_name, component,
 					  info->extack);
-- 
cgit v1.2.3


From bc75c054f04048517e0b153ab38d973bbcdcef59 Mon Sep 17 00:00:00 2001
From: Jacob Keller <jacob.e.keller@intel.com>
Date: Fri, 25 Sep 2020 13:46:06 -0700
Subject: devlink: convert flash_update to use params structure

The devlink core recently gained support for checking whether the driver
supports a flash_update parameter, via `supported_flash_update_params`.
However, parameters are specified as function arguments. Adding a new
parameter still requires modifying the signature of the .flash_update
callback in all drivers.

Convert the .flash_update function to take a new `struct
devlink_flash_update_params` instead. By using this structure, and the
`supported_flash_update_params` bit field, a new parameter to
flash_update can be added without requiring modification to existing
drivers.

As before, all parameters except file_name will require driver opt-in.
Because file_name is a necessary field to for the flash_update to make
sense, no "SUPPORTED" bitflag is provided and it is always considered
valid. All future additional parameters will require a new bit in the
supported_flash_update_params bitfield.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Cc: Jiri Pirko <jiri@mellanox.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michael Chan <michael.chan@broadcom.com>
Cc: Bin Luo <luobin9@huawei.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Ido Schimmel <idosch@mellanox.com>
Cc: Danielle Ratson <danieller@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c      |  7 ++++---
 drivers/net/ethernet/huawei/hinic/hinic_devlink.c      |  5 ++---
 drivers/net/ethernet/intel/ice/ice_devlink.c           | 10 +++++-----
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c      |  5 ++---
 drivers/net/ethernet/mellanox/mlxsw/core.c             |  9 ++++-----
 drivers/net/ethernet/netronome/nfp/nfp_devlink.c       |  7 ++++---
 drivers/net/ethernet/pensando/ionic/ionic_devlink.c    |  5 ++---
 drivers/net/netdevsim/dev.c                            | 14 +++++++-------
 include/net/devlink.h                                  | 18 ++++++++++++++++--
 net/core/devlink.c                                     | 14 ++++++++------
 .../testing/selftests/drivers/net/netdevsim/devlink.sh |  3 +++
 11 files changed, 57 insertions(+), 40 deletions(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
index a17764db1419..d436134bdc40 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -17,8 +17,9 @@
 #include "bnxt_ethtool.h"
 
 static int
-bnxt_dl_flash_update(struct devlink *dl, const char *filename,
-		     const char *region, struct netlink_ext_ack *extack)
+bnxt_dl_flash_update(struct devlink *dl,
+		     struct devlink_flash_update_params *params,
+		     struct netlink_ext_ack *extack)
 {
 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
 	int rc;
@@ -31,7 +32,7 @@ bnxt_dl_flash_update(struct devlink *dl, const char *filename,
 
 	devlink_flash_update_begin_notify(dl);
 	devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0);
-	rc = bnxt_flash_package_from_file(bp->dev, filename, 0);
+	rc = bnxt_flash_package_from_file(bp->dev, params->file_name, 0);
 	if (!rc)
 		devlink_flash_update_status_notify(dl, "Flashing done", NULL, 0, 0);
 	else
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
index 662a27a514ae..2630d667f393 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
@@ -281,15 +281,14 @@ static int hinic_firmware_update(struct hinic_devlink_priv *priv,
 }
 
 static int hinic_devlink_flash_update(struct devlink *devlink,
-				      const char *file_name,
-				      const char *component,
+				      struct devlink_flash_update_params *params,
 				      struct netlink_ext_ack *extack)
 {
 	struct hinic_devlink_priv *priv = devlink_priv(devlink);
 	const struct firmware *fw;
 	int err;
 
-	err = request_firmware_direct(&fw, file_name,
+	err = request_firmware_direct(&fw, params->file_name,
 				      &priv->hwdev->hwif->pdev->dev);
 	if (err)
 		return err;
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 4666f1d5a695..c3d61c246f0b 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -233,8 +233,7 @@ static int ice_devlink_info_get(struct devlink *devlink,
 /**
  * ice_devlink_flash_update - Update firmware stored in flash on the device
  * @devlink: pointer to devlink associated with device to update
- * @path: the path of the firmware file to use via request_firmware
- * @component: name of the component to update, or NULL
+ * @params: flash update parameters
  * @extack: netlink extended ACK structure
  *
  * Perform a device flash update. The bulk of the update logic is contained
@@ -243,8 +242,9 @@ static int ice_devlink_info_get(struct devlink *devlink,
  * Returns: zero on success, or an error code on failure.
  */
 static int
-ice_devlink_flash_update(struct devlink *devlink, const char *path,
-			 const char *component, struct netlink_ext_ack *extack)
+ice_devlink_flash_update(struct devlink *devlink,
+			 struct devlink_flash_update_params *params,
+			 struct netlink_ext_ack *extack)
 {
 	struct ice_pf *pf = devlink_priv(devlink);
 	struct device *dev = &pf->pdev->dev;
@@ -261,7 +261,7 @@ ice_devlink_flash_update(struct devlink *devlink, const char *path,
 	if (err)
 		return err;
 
-	err = request_firmware(&fw, path, dev);
+	err = request_firmware(&fw, params->file_name, dev);
 	if (err) {
 		NL_SET_ERR_MSG_MOD(extack, "Unable to read file from disk");
 		return err;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index fccae4b802b6..9b14e3f805a2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -8,15 +8,14 @@
 #include "eswitch.h"
 
 static int mlx5_devlink_flash_update(struct devlink *devlink,
-				     const char *file_name,
-				     const char *component,
+				     struct devlink_flash_update_params *params,
 				     struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
 	const struct firmware *fw;
 	int err;
 
-	err = request_firmware_direct(&fw, file_name, &dev->pdev->dev);
+	err = request_firmware_direct(&fw, params->file_name, &dev->pdev->dev);
 	if (err)
 		return err;
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 3ffd03ef9c0e..f8dddcf461f5 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1102,13 +1102,13 @@ static int mlxsw_core_fw_rev_validate(struct mlxsw_core *mlxsw_core,
 }
 
 static int mlxsw_core_fw_flash_update(struct mlxsw_core *mlxsw_core,
-				      const char *file_name, const char *component,
+				      struct devlink_flash_update_params *params,
 				      struct netlink_ext_ack *extack)
 {
 	const struct firmware *firmware;
 	int err;
 
-	err = request_firmware_direct(&firmware, file_name, mlxsw_core->bus_info->dev);
+	err = request_firmware_direct(&firmware, params->file_name, mlxsw_core->bus_info->dev);
 	if (err)
 		return err;
 	err = mlxsw_core_fw_flash(mlxsw_core, firmware, extack);
@@ -1431,13 +1431,12 @@ mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink,
 }
 
 static int mlxsw_devlink_flash_update(struct devlink *devlink,
-				      const char *file_name,
-				      const char *component,
+				      struct devlink_flash_update_params *params,
 				      struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
-	return mlxsw_core_fw_flash_update(mlxsw_core, file_name, component, extack);
+	return mlxsw_core_fw_flash_update(mlxsw_core, params, extack);
 }
 
 static int mlxsw_devlink_trap_init(struct devlink *devlink,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index c93cb9a27e25..97d2b03208de 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -329,10 +329,11 @@ err_close_nsp:
 }
 
 static int
-nfp_devlink_flash_update(struct devlink *devlink, const char *path,
-			 const char *component, struct netlink_ext_ack *extack)
+nfp_devlink_flash_update(struct devlink *devlink,
+			 struct devlink_flash_update_params *params,
+			 struct netlink_ext_ack *extack)
 {
-	return nfp_flash_update_common(devlink_priv(devlink), path, extack);
+	return nfp_flash_update_common(devlink_priv(devlink), params->file_name, extack);
 }
 
 const struct devlink_ops nfp_devlink_ops = {
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
index c125988b0954..51d64718ed9f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
@@ -10,13 +10,12 @@
 #include "ionic_devlink.h"
 
 static int ionic_dl_flash_update(struct devlink *dl,
-				 const char *fwname,
-				 const char *component,
+				 struct devlink_flash_update_params *params,
 				 struct netlink_ext_ack *extack)
 {
 	struct ionic *ionic = devlink_priv(dl);
 
-	return ionic_firmware_update(ionic->lif, fwname, extack);
+	return ionic_firmware_update(ionic->lif, params->file_name, extack);
 }
 
 static int ionic_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 424bdab8e888..2d218afad375 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -742,8 +742,8 @@ static int nsim_dev_info_get(struct devlink *devlink,
 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
 
-static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
-				 const char *component,
+static int nsim_dev_flash_update(struct devlink *devlink,
+				 struct devlink_flash_update_params *params,
 				 struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
@@ -753,13 +753,13 @@ static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
 		devlink_flash_update_begin_notify(devlink);
 		devlink_flash_update_status_notify(devlink,
 						   "Preparing to flash",
-						   component, 0, 0);
+						   params->component, 0, 0);
 	}
 
 	for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
 		if (nsim_dev->fw_update_status)
 			devlink_flash_update_status_notify(devlink, "Flashing",
-							   component,
+							   params->component,
 							   i * NSIM_DEV_FLASH_CHUNK_SIZE,
 							   NSIM_DEV_FLASH_SIZE);
 		msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
@@ -767,13 +767,13 @@ static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
 
 	if (nsim_dev->fw_update_status) {
 		devlink_flash_update_status_notify(devlink, "Flashing",
-						   component,
+						   params->component,
 						   NSIM_DEV_FLASH_SIZE,
 						   NSIM_DEV_FLASH_SIZE);
 		devlink_flash_update_timeout_notify(devlink, "Flash select",
-						    component, 81);
+						    params->component, 81);
 		devlink_flash_update_status_notify(devlink, "Flashing done",
-						   component, 0, 0);
+						   params->component, 0, 0);
 		devlink_flash_update_end_notify(devlink);
 	}
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index cec6b4f109fa..7794e1601772 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -550,6 +550,20 @@ enum devlink_param_generic_id {
 /* Firmware bundle identifier */
 #define DEVLINK_INFO_VERSION_GENERIC_FW_BUNDLE_ID	"fw.bundle_id"
 
+/**
+ * struct devlink_flash_update_params - Flash Update parameters
+ * @file_name: the name of the flash firmware file to update from
+ * @component: the flash component to update
+ *
+ * With the exception of file_name, drivers must opt-in to parameters by
+ * setting the appropriate bit in the supported_flash_update_params field in
+ * their devlink_ops structure.
+ */
+struct devlink_flash_update_params {
+	const char *file_name;
+	const char *component;
+};
+
 #define DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT	BIT(0)
 
 struct devlink_region;
@@ -1112,8 +1126,8 @@ struct devlink_ops {
 	 * parameters supported by the driver should be set in
 	 * supported_flash_update_params.
 	 */
-	int (*flash_update)(struct devlink *devlink, const char *file_name,
-			    const char *component,
+	int (*flash_update)(struct devlink *devlink,
+			    struct devlink_flash_update_params *params,
 			    struct netlink_ext_ack *extack);
 	/**
 	 * @trap_init: Trap initialization function.
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 7c69a41016a2..6766f9ef3152 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3147,8 +3147,8 @@ EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 				       struct genl_info *info)
 {
+	struct devlink_flash_update_params params = {};
 	struct devlink *devlink = info->user_ptr[0];
-	const char *file_name, *component = NULL;
 	struct nlattr *nla_component;
 	u32 supported_params;
 
@@ -3160,7 +3160,7 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 
 	supported_params = devlink->ops->supported_flash_update_params;
 
-	file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
+	params.file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
 
 	nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
 	if (nla_component) {
@@ -3169,11 +3169,10 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 					    "component update is not supported by this device");
 			return -EOPNOTSUPP;
 		}
-		component = nla_data(nla_component);
+		params.component = nla_data(nla_component);
 	}
 
-	return devlink->ops->flash_update(devlink, file_name, component,
-					  info->extack);
+	return devlink->ops->flash_update(devlink, &params, info->extack);
 }
 
 static const struct devlink_param devlink_param_generic[] = {
@@ -9651,6 +9650,7 @@ out:
 
 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
 {
+	struct devlink_flash_update_params params = {};
 	struct devlink *devlink;
 	int ret;
 
@@ -9663,8 +9663,10 @@ int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
 		goto out;
 	}
 
+	params.file_name = file_name;
+
 	mutex_lock(&devlink->lock);
-	ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
+	ret = devlink->ops->flash_update(devlink, &params, NULL);
 	mutex_unlock(&devlink->lock);
 
 out:
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index de4b32fc4223..1e7541688978 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -23,6 +23,9 @@ fw_flash_test()
 	devlink dev flash $DL_HANDLE file dummy
 	check_err $? "Failed to flash with status updates on"
 
+	devlink dev flash $DL_HANDLE file dummy component fw.mgmt
+	check_err $? "Failed to flash with component attribute"
+
 	echo "n"> $DEBUGFS_DIR/fw_update_status
 	check_err $? "Failed to disable status updates"
 
-- 
cgit v1.2.3


From cbb58368fbccc823a85df73bd6bf7db6dfda86aa Mon Sep 17 00:00:00 2001
From: Jacob Keller <jacob.e.keller@intel.com>
Date: Fri, 25 Sep 2020 13:46:08 -0700
Subject: netdevsim: add support for flash_update overwrite mask

The devlink interface recently gained support for a new "overwrite mask"
parameter that allows specifying how various sub-sections of a flash
component are modified when updating.

Add support for this to netdevsim, to enable easily testing the
interface. Make the allowed overwrite mask values controllable via
a debugfs parameter. This enables testing a flow where the driver
rejects an unsupportable overwrite mask.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/netdevsim/dev.c                            | 10 +++++++++-
 drivers/net/netdevsim/netdevsim.h                      |  1 +
 .../testing/selftests/drivers/net/netdevsim/devlink.sh | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 2d218afad375..56213ba151f6 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -203,6 +203,8 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 		return PTR_ERR(nsim_dev->ports_ddir);
 	debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
 			    &nsim_dev->fw_update_status);
+	debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
+			    &nsim_dev->fw_update_overwrite_mask);
 	debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
 			   &nsim_dev->max_macs);
 	debugfs_create_bool("test1", 0600, nsim_dev->ddir,
@@ -749,6 +751,9 @@ static int nsim_dev_flash_update(struct devlink *devlink,
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 	int i;
 
+	if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
+		return -EOPNOTSUPP;
+
 	if (nsim_dev->fw_update_status) {
 		devlink_flash_update_begin_notify(devlink);
 		devlink_flash_update_status_notify(devlink,
@@ -879,7 +884,8 @@ nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
 }
 
 static const struct devlink_ops nsim_dev_devlink_ops = {
-	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT,
+	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
+					 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
 	.reload_down = nsim_dev_reload_down,
 	.reload_up = nsim_dev_reload_up,
 	.info_get = nsim_dev_info_get,
@@ -994,6 +1000,7 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 	INIT_LIST_HEAD(&nsim_dev->port_list);
 	mutex_init(&nsim_dev->port_list_lock);
 	nsim_dev->fw_update_status = true;
+	nsim_dev->fw_update_overwrite_mask = 0;
 
 	nsim_dev->fib_data = nsim_fib_create(devlink, extack);
 	if (IS_ERR(nsim_dev->fib_data))
@@ -1052,6 +1059,7 @@ int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
 	INIT_LIST_HEAD(&nsim_dev->port_list);
 	mutex_init(&nsim_dev->port_list_lock);
 	nsim_dev->fw_update_status = true;
+	nsim_dev->fw_update_overwrite_mask = 0;
 	nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
 	nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
 	spin_lock_init(&nsim_dev->fa_cookie_lock);
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 0c86561e6d8d..0a1b28aea894 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -196,6 +196,7 @@ struct nsim_dev {
 	struct list_head port_list;
 	struct mutex port_list_lock; /* protects port list */
 	bool fw_update_status;
+	u32 fw_update_overwrite_mask;
 	u32 max_macs;
 	bool test1;
 	bool dont_allow_reload;
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index 1e7541688978..40909c254365 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -26,6 +26,24 @@ fw_flash_test()
 	devlink dev flash $DL_HANDLE file dummy component fw.mgmt
 	check_err $? "Failed to flash with component attribute"
 
+	devlink dev flash $DL_HANDLE file dummy overwrite settings
+	check_fail $? "Flash with overwrite settings should be rejected"
+
+	echo "1"> $DEBUGFS_DIR/fw_update_overwrite_mask
+	check_err $? "Failed to change allowed overwrite mask"
+
+	devlink dev flash $DL_HANDLE file dummy overwrite settings
+	check_err $? "Failed to flash with settings overwrite enabled"
+
+	devlink dev flash $DL_HANDLE file dummy overwrite identifiers
+	check_fail $? "Flash with overwrite settings should be identifiers"
+
+	echo "3"> $DEBUGFS_DIR/fw_update_overwrite_mask
+	check_err $? "Failed to change allowed overwrite mask"
+
+	devlink dev flash $DL_HANDLE file dummy overwrite identifiers overwrite settings
+	check_err $? "Failed to flash with settings and identifiers overwrite enabled"
+
 	echo "n"> $DEBUGFS_DIR/fw_update_status
 	check_err $? "Failed to disable status updates"
 
-- 
cgit v1.2.3


From ccdf07219da6bd1f43c6ddcde4c0e36993c7365a Mon Sep 17 00:00:00 2001
From: Moshe Shemesh <moshe@mellanox.com>
Date: Wed, 7 Oct 2020 09:00:43 +0300
Subject: devlink: Add reload action option to devlink reload command

Add devlink reload action to allow the user to request a specific reload
action. The action parameter is optional, if not specified then devlink
driver re-init action is used (backward compatible).
Note that when required to do firmware activation some drivers may need
to reload the driver. On the other hand some drivers may need to reset
the firmware to reinitialize the driver entities. Therefore, the devlink
reload command returns the actions which were actually performed.
Reload actions supported are:
driver_reinit: driver entities re-initialization, applying devlink-param
               and devlink-resource values.
fw_activate: firmware activate.

command examples:
$devlink dev reload pci/0000:82:00.0 action driver_reinit
reload_actions_performed:
  driver_reinit

$devlink dev reload pci/0000:82:00.0 action fw_activate
reload_actions_performed:
  driver_reinit fw_activate

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx4/main.c         |  7 +-
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c |  7 +-
 drivers/net/ethernet/mellanox/mlxsw/core.c        | 10 ++-
 drivers/net/netdevsim/dev.c                       |  8 +-
 include/net/devlink.h                             |  7 +-
 include/uapi/linux/devlink.h                      | 13 +++
 net/core/devlink.c                                | 98 +++++++++++++++++++++--
 7 files changed, 131 insertions(+), 19 deletions(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 70cf24ba71e4..649c5323cf9f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3946,6 +3946,7 @@ static int mlx4_restart_one_up(struct pci_dev *pdev, bool reload,
 			       struct devlink *devlink);
 
 static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
+				    enum devlink_reload_action action,
 				    struct netlink_ext_ack *extack)
 {
 	struct mlx4_priv *priv = devlink_priv(devlink);
@@ -3962,14 +3963,15 @@ static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
 	return 0;
 }
 
-static int mlx4_devlink_reload_up(struct devlink *devlink,
-				  struct netlink_ext_ack *extack)
+static int mlx4_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
+				  u32 *actions_performed, struct netlink_ext_ack *extack)
 {
 	struct mlx4_priv *priv = devlink_priv(devlink);
 	struct mlx4_dev *dev = &priv->dev;
 	struct mlx4_dev_persistent *persist = dev->persist;
 	int err;
 
+	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 	err = mlx4_restart_one_up(persist->pdev, true, devlink);
 	if (err)
 		mlx4_err(persist->dev, "mlx4_restart_one_up failed, ret=%d\n",
@@ -3980,6 +3982,7 @@ static int mlx4_devlink_reload_up(struct devlink *devlink,
 
 static const struct devlink_ops mlx4_devlink_ops = {
 	.port_type_set	= mlx4_devlink_port_type_set,
+	.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
 	.reload_down	= mlx4_devlink_reload_down,
 	.reload_up	= mlx4_devlink_reload_up,
 };
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 9b14e3f805a2..1b248c01a209 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -85,6 +85,7 @@ mlx5_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 }
 
 static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
+				    enum devlink_reload_action action,
 				    struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
@@ -93,11 +94,12 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 	return 0;
 }
 
-static int mlx5_devlink_reload_up(struct devlink *devlink,
-				  struct netlink_ext_ack *extack)
+static int mlx5_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
+				  u32 *actions_performed, struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
 
+	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 	return mlx5_load_one(dev, false);
 }
 
@@ -114,6 +116,7 @@ static const struct devlink_ops mlx5_devlink_ops = {
 #endif
 	.flash_update = mlx5_devlink_flash_update,
 	.info_get = mlx5_devlink_info_get,
+	.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
 	.reload_down = mlx5_devlink_reload_down,
 	.reload_up = mlx5_devlink_reload_up,
 };
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index a21afa56e3f7..cd9f56c73827 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1414,7 +1414,7 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 
 static int
 mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
-					  bool netns_change,
+					  bool netns_change, enum devlink_reload_action action,
 					  struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
@@ -1427,11 +1427,13 @@ mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
 }
 
 static int
-mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink,
-					struct netlink_ext_ack *extack)
+mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, enum devlink_reload_action action,
+					u32 *actions_performed,	struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
+	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
+			     BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE);
 	return mlxsw_core_bus_device_register(mlxsw_core->bus_info,
 					      mlxsw_core->bus,
 					      mlxsw_core->bus_priv, true,
@@ -1564,6 +1566,8 @@ mlxsw_devlink_trap_policer_counter_get(struct devlink *devlink,
 }
 
 static const struct devlink_ops mlxsw_devlink_ops = {
+	.reload_actions		= BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
+				  BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE),
 	.reload_down		= mlxsw_devlink_core_bus_device_reload_down,
 	.reload_up		= mlxsw_devlink_core_bus_device_reload_up,
 	.port_type_set			= mlxsw_devlink_port_type_set,
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 56213ba151f6..b57e35c4ef6f 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -701,7 +701,7 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
 
 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
-				struct netlink_ext_ack *extack)
+				enum devlink_reload_action action, struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
@@ -717,8 +717,8 @@ static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
 	return 0;
 }
 
-static int nsim_dev_reload_up(struct devlink *devlink,
-			      struct netlink_ext_ack *extack)
+static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
+			      u32 *actions_performed, struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
@@ -730,6 +730,7 @@ static int nsim_dev_reload_up(struct devlink *devlink,
 		return -EINVAL;
 	}
 
+	*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 	return nsim_dev_reload_create(nsim_dev, extack);
 }
 
@@ -886,6 +887,7 @@ nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
 static const struct devlink_ops nsim_dev_devlink_ops = {
 	.supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
 					 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
+	.reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
 	.reload_down = nsim_dev_reload_down,
 	.reload_up = nsim_dev_reload_up,
 	.info_get = nsim_dev_info_get,
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 237ba5e29a3b..93c535ae5a4b 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1150,10 +1150,11 @@ struct devlink_ops {
 	 * implemementation.
 	 */
 	u32 supported_flash_update_params;
+	unsigned long reload_actions;
 	int (*reload_down)(struct devlink *devlink, bool netns_change,
-			   struct netlink_ext_ack *extack);
-	int (*reload_up)(struct devlink *devlink,
-			 struct netlink_ext_ack *extack);
+			   enum devlink_reload_action action, struct netlink_ext_ack *extack);
+	int (*reload_up)(struct devlink *devlink, enum devlink_reload_action action,
+			 u32 *actions_performed, struct netlink_ext_ack *extack);
 	int (*port_type_set)(struct devlink_port *devlink_port,
 			     enum devlink_port_type port_type);
 	int (*port_split)(struct devlink *devlink, unsigned int port_index,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 5f1d6c327670..74bdad252c36 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -301,6 +301,16 @@ enum {
 	DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE,
 };
 
+enum devlink_reload_action {
+	DEVLINK_RELOAD_ACTION_UNSPEC,
+	DEVLINK_RELOAD_ACTION_DRIVER_REINIT,	/* Driver entities re-instantiation */
+	DEVLINK_RELOAD_ACTION_FW_ACTIVATE,	/* FW activate */
+
+	/* Add new reload actions above */
+	__DEVLINK_RELOAD_ACTION_MAX,
+	DEVLINK_RELOAD_ACTION_MAX = __DEVLINK_RELOAD_ACTION_MAX - 1
+};
+
 enum devlink_attr {
 	/* don't change the order or add anything between, this is ABI! */
 	DEVLINK_ATTR_UNSPEC,
@@ -493,6 +503,9 @@ enum devlink_attr {
 	DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,	/* u64 */
 	DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK,	/* bitfield32 */
 
+	DEVLINK_ATTR_RELOAD_ACTION,		/* u8 */
+	DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED,	/* bitfield32 */
+
 	/* add new attributes above here, update the policy in devlink.c */
 
 	__DEVLINK_ATTR_MAX,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 5c45b3964ec3..c026ed3519c9 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -479,6 +479,12 @@ static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 	return 0;
 }
 
+static bool
+devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
+{
+	return test_bit(action, &devlink->ops->reload_actions);
+}
+
 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 			   enum devlink_command cmd, u32 portid,
 			   u32 seq, int flags)
@@ -2984,6 +2990,7 @@ bool devlink_is_reload_failed(const struct devlink *devlink)
 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
 
 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
+			  enum devlink_reload_action action, u32 *actions_performed,
 			  struct netlink_ext_ack *extack)
 {
 	int err;
@@ -2991,22 +2998,60 @@ static int devlink_reload(struct devlink *devlink, struct net *dest_net,
 	if (!devlink->reload_enabled)
 		return -EOPNOTSUPP;
 
-	err = devlink->ops->reload_down(devlink, !!dest_net, extack);
+	err = devlink->ops->reload_down(devlink, !!dest_net, action, extack);
 	if (err)
 		return err;
 
 	if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
 		devlink_reload_netns_change(devlink, dest_net);
 
-	err = devlink->ops->reload_up(devlink, extack);
+	err = devlink->ops->reload_up(devlink, action, actions_performed, extack);
 	devlink_reload_failed_set(devlink, !!err);
-	return err;
+	if (err)
+		return err;
+
+	WARN_ON(!(*actions_performed & BIT(action)));
+	return 0;
+}
+
+static int
+devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
+					enum devlink_command cmd, struct genl_info *info)
+{
+	struct sk_buff *msg;
+	void *hdr;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd);
+	if (!hdr)
+		goto free_msg;
+
+	if (devlink_nl_put_handle(msg, devlink))
+		goto nla_put_failure;
+
+	if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed,
+			       actions_performed))
+		goto nla_put_failure;
+	genlmsg_end(msg, hdr);
+
+	return genlmsg_reply(msg, info);
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+free_msg:
+	nlmsg_free(msg);
+	return -EMSGSIZE;
 }
 
 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 {
 	struct devlink *devlink = info->user_ptr[0];
+	enum devlink_reload_action action;
 	struct net *dest_net = NULL;
+	u32 actions_performed;
 	int err;
 
 	if (!devlink_reload_supported(devlink->ops))
@@ -3026,12 +3071,30 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 			return PTR_ERR(dest_net);
 	}
 
-	err = devlink_reload(devlink, dest_net, info->extack);
+	if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
+		action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]);
+	else
+		action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT;
+
+	if (!devlink_reload_action_is_supported(devlink, action)) {
+		NL_SET_ERR_MSG_MOD(info->extack,
+				   "Requested reload action is not supported by the driver");
+		return -EOPNOTSUPP;
+	}
+
+	err = devlink_reload(devlink, dest_net, action, &actions_performed, info->extack);
 
 	if (dest_net)
 		put_net(dest_net);
 
-	return err;
+	if (err)
+		return err;
+	/* For backward compatibility generate reply only if attributes used by user */
+	if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
+		return 0;
+
+	return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
+						       DEVLINK_CMD_RELOAD, info);
 }
 
 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
@@ -7282,6 +7345,8 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
 	[DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
 	[DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
+	[DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+							DEVLINK_RELOAD_ACTION_MAX),
 };
 
 static const struct genl_small_ops devlink_nl_ops[] = {
@@ -7615,6 +7680,21 @@ static struct genl_family devlink_nl_family __ro_after_init = {
 	.n_mcgrps	= ARRAY_SIZE(devlink_nl_mcgrps),
 };
 
+static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
+{
+	if (!devlink_reload_supported(ops)) {
+		if (WARN_ON(ops->reload_actions))
+			return false;
+		return true;
+	}
+
+	if (WARN_ON(!ops->reload_actions ||
+		    ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
+		    ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
+		return false;
+	return true;
+}
+
 /**
  *	devlink_alloc - Allocate new devlink instance resources
  *
@@ -7631,6 +7711,9 @@ struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
 	if (WARN_ON(!ops))
 		return NULL;
 
+	if (!devlink_reload_actions_valid(ops))
+		return NULL;
+
 	devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
 	if (!devlink)
 		return NULL;
@@ -9960,6 +10043,7 @@ int devlink_compat_switch_id_get(struct net_device *dev,
 static void __net_exit devlink_pernet_pre_exit(struct net *net)
 {
 	struct devlink *devlink;
+	u32 actions_performed;
 	int err;
 
 	/* In case network namespace is getting destroyed, reload
@@ -9970,7 +10054,9 @@ static void __net_exit devlink_pernet_pre_exit(struct net *net)
 		if (net_eq(devlink_net(devlink), net)) {
 			if (WARN_ON(!devlink_reload_supported(devlink->ops)))
 				continue;
-			err = devlink_reload(devlink, &init_net, NULL);
+			err = devlink_reload(devlink, &init_net,
+					     DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+					     &actions_performed, NULL);
 			if (err && err != -EOPNOTSUPP)
 				pr_warn("Failed to reload devlink instance into init_net\n");
 		}
-- 
cgit v1.2.3


From dc64cc7c63102ac78bac3cfbc00ef3abd7a3fdf3 Mon Sep 17 00:00:00 2001
From: Moshe Shemesh <moshe@mellanox.com>
Date: Wed, 7 Oct 2020 09:00:44 +0300
Subject: devlink: Add devlink reload limit option

Add reload limit to demand restrictions on reload actions.
Reload limits supported:
no_reset: No reset allowed, no down time allowed, no link flap and no
          configuration is lost.

By default reload limit is unspecified and so no constraints on reload
actions are required.

Some combinations of action and limit are invalid. For example, driver
can not reinitialize its entities without any downtime.

The no_reset reload limit will have usecase in this patchset to
implement restricted fw_activate on mlx5.

Have the uapi parameter of reload limit ready for future support of
multiselection.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx4/main.c         |  4 +-
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c |  4 +-
 drivers/net/ethernet/mellanox/mlxsw/core.c        |  4 +-
 drivers/net/netdevsim/dev.c                       |  6 +-
 include/net/devlink.h                             |  8 +-
 include/uapi/linux/devlink.h                      | 14 ++++
 net/core/devlink.c                                | 92 +++++++++++++++++++++--
 7 files changed, 119 insertions(+), 13 deletions(-)

(limited to 'drivers/net/netdevsim/dev.c')

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 649c5323cf9f..c326b434734e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3947,6 +3947,7 @@ static int mlx4_restart_one_up(struct pci_dev *pdev, bool reload,
 
 static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
 				    enum devlink_reload_action action,
+				    enum devlink_reload_limit limit,
 				    struct netlink_ext_ack *extack)
 {
 	struct mlx4_priv *priv = devlink_priv(devlink);
@@ -3964,7 +3965,8 @@ static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
 }
 
 static int mlx4_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
-				  u32 *actions_performed, struct netlink_ext_ack *extack)
+				  enum devlink_reload_limit limit, u32 *actions_performed,
+				  struct netlink_ext_ack *extack)
 {
 	struct mlx4_priv *priv = devlink_priv(devlink);
 	struct mlx4_dev *dev = &priv->dev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 1b248c01a209..0016041e8779 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -86,6 +86,7 @@ mlx5_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 
 static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 				    enum devlink_reload_action action,
+				    enum devlink_reload_limit limit,
 				    struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
@@ -95,7 +96,8 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 }
 
 static int mlx5_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
-				  u32 *actions_performed, struct netlink_ext_ack *extack)
+				  enum devlink_reload_limit limit, u32 *actions_performed,
+				  struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index cd9f56c73827..7f77c2a71d1c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1415,6 +1415,7 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 static int
 mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
 					  bool netns_change, enum devlink_reload_action action,
+					  enum devlink_reload_limit limit,
 					  struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
@@ -1428,7 +1429,8 @@ mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
 
 static int
 mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, enum devlink_reload_action action,
-					u32 *actions_performed,	struct netlink_ext_ack *extack)
+					enum devlink_reload_limit limit, u32 *actions_performed,
+					struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index b57e35c4ef6f..d07061417675 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -701,7 +701,8 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
 
 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
-				enum devlink_reload_action action, struct netlink_ext_ack *extack)
+				enum devlink_reload_action action, enum devlink_reload_limit limit,
+				struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
@@ -718,7 +719,8 @@ static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
 }
 
 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
-			      u32 *actions_performed, struct netlink_ext_ack *extack)
+			      enum devlink_reload_limit limit, u32 *actions_performed,
+			      struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 93c535ae5a4b..9f5c37c391f8 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1151,10 +1151,14 @@ struct devlink_ops {
 	 */
 	u32 supported_flash_update_params;
 	unsigned long reload_actions;
+	unsigned long reload_limits;
 	int (*reload_down)(struct devlink *devlink, bool netns_change,
-			   enum devlink_reload_action action, struct netlink_ext_ack *extack);
+			   enum devlink_reload_action action,
+			   enum devlink_reload_limit limit,
+			   struct netlink_ext_ack *extack);
 	int (*reload_up)(struct devlink *devlink, enum devlink_reload_action action,
-			 u32 *actions_performed, struct netlink_ext_ack *extack);
+			 enum devlink_reload_limit limit, u32 *actions_performed,
+			 struct netlink_ext_ack *extack);
 	int (*port_type_set)(struct devlink_port *devlink_port,
 			     enum devlink_port_type port_type);
 	int (*port_split)(struct devlink *devlink, unsigned int port_index,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 74bdad252c36..82a5e66c1518 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -311,6 +311,19 @@ enum devlink_reload_action {
 	DEVLINK_RELOAD_ACTION_MAX = __DEVLINK_RELOAD_ACTION_MAX - 1
 };
 
+enum devlink_reload_limit {
+	DEVLINK_RELOAD_LIMIT_UNSPEC,	/* unspecified, no constraints */
+	DEVLINK_RELOAD_LIMIT_NO_RESET,	/* No reset allowed, no down time allowed,
+					 * no link flap and no configuration is lost.
+					 */
+
+	/* Add new reload limit above */
+	__DEVLINK_RELOAD_LIMIT_MAX,
+	DEVLINK_RELOAD_LIMIT_MAX = __DEVLINK_RELOAD_LIMIT_MAX - 1
+};
+
+#define DEVLINK_RELOAD_LIMITS_VALID_MASK (BIT(__DEVLINK_RELOAD_LIMIT_MAX) - 1)
+
 enum devlink_attr {
 	/* don't change the order or add anything between, this is ABI! */
 	DEVLINK_ATTR_UNSPEC,
@@ -505,6 +518,7 @@ enum devlink_attr {
 
 	DEVLINK_ATTR_RELOAD_ACTION,		/* u8 */
 	DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED,	/* bitfield32 */
+	DEVLINK_ATTR_RELOAD_LIMITS,		/* bitfield32 */
 
 	/* add new attributes above here, update the policy in devlink.c */
 
diff --git a/net/core/devlink.c b/net/core/devlink.c
index c026ed3519c9..28b63faa3c6b 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -479,12 +479,44 @@ static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 	return 0;
 }
 
+struct devlink_reload_combination {
+	enum devlink_reload_action action;
+	enum devlink_reload_limit limit;
+};
+
+static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
+	{
+		/* can't reinitialize driver with no down time */
+		.action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+		.limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
+	},
+};
+
+static bool
+devlink_reload_combination_is_invalid(enum devlink_reload_action action,
+				      enum devlink_reload_limit limit)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
+		if (devlink_reload_invalid_combinations[i].action == action &&
+		    devlink_reload_invalid_combinations[i].limit == limit)
+			return true;
+	return false;
+}
+
 static bool
 devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
 {
 	return test_bit(action, &devlink->ops->reload_actions);
 }
 
+static bool
+devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
+{
+	return test_bit(limit, &devlink->ops->reload_limits);
+}
+
 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 			   enum devlink_command cmd, u32 portid,
 			   u32 seq, int flags)
@@ -2990,22 +3022,22 @@ bool devlink_is_reload_failed(const struct devlink *devlink)
 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
 
 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
-			  enum devlink_reload_action action, u32 *actions_performed,
-			  struct netlink_ext_ack *extack)
+			  enum devlink_reload_action action, enum devlink_reload_limit limit,
+			  u32 *actions_performed, struct netlink_ext_ack *extack)
 {
 	int err;
 
 	if (!devlink->reload_enabled)
 		return -EOPNOTSUPP;
 
-	err = devlink->ops->reload_down(devlink, !!dest_net, action, extack);
+	err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
 	if (err)
 		return err;
 
 	if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
 		devlink_reload_netns_change(devlink, dest_net);
 
-	err = devlink->ops->reload_up(devlink, action, actions_performed, extack);
+	err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
 	devlink_reload_failed_set(devlink, !!err);
 	if (err)
 		return err;
@@ -3050,6 +3082,7 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 {
 	struct devlink *devlink = info->user_ptr[0];
 	enum devlink_reload_action action;
+	enum devlink_reload_limit limit;
 	struct net *dest_net = NULL;
 	u32 actions_performed;
 	int err;
@@ -3082,7 +3115,38 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 		return -EOPNOTSUPP;
 	}
 
-	err = devlink_reload(devlink, dest_net, action, &actions_performed, info->extack);
+	limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
+	if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
+		struct nla_bitfield32 limits;
+		u32 limits_selected;
+
+		limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
+		limits_selected = limits.value & limits.selector;
+		if (!limits_selected) {
+			NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected");
+			return -EINVAL;
+		}
+		for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
+			if (limits_selected & BIT(limit))
+				break;
+		/* UAPI enables multiselection, but currently it is not used */
+		if (limits_selected != BIT(limit)) {
+			NL_SET_ERR_MSG_MOD(info->extack,
+					   "Multiselection of limit is not supported");
+			return -EOPNOTSUPP;
+		}
+		if (!devlink_reload_limit_is_supported(devlink, limit)) {
+			NL_SET_ERR_MSG_MOD(info->extack,
+					   "Requested limit is not supported by the driver");
+			return -EOPNOTSUPP;
+		}
+		if (devlink_reload_combination_is_invalid(action, limit)) {
+			NL_SET_ERR_MSG_MOD(info->extack,
+					   "Requested limit is invalid for this action");
+			return -EINVAL;
+		}
+	}
+	err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
 
 	if (dest_net)
 		put_net(dest_net);
@@ -3090,7 +3154,7 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 	if (err)
 		return err;
 	/* For backward compatibility generate reply only if attributes used by user */
-	if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
+	if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
 		return 0;
 
 	return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
@@ -7347,6 +7411,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
 	[DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
 							DEVLINK_RELOAD_ACTION_MAX),
+	[DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),
 };
 
 static const struct genl_small_ops devlink_nl_ops[] = {
@@ -7682,6 +7747,9 @@ static struct genl_family devlink_nl_family __ro_after_init = {
 
 static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
 {
+	const struct devlink_reload_combination *comb;
+	int i;
+
 	if (!devlink_reload_supported(ops)) {
 		if (WARN_ON(ops->reload_actions))
 			return false;
@@ -7692,6 +7760,17 @@ static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
 		    ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
 		    ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
 		return false;
+
+	if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
+		    ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
+		return false;
+
+	for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)  {
+		comb = &devlink_reload_invalid_combinations[i];
+		if (ops->reload_actions == BIT(comb->action) &&
+		    ops->reload_limits == BIT(comb->limit))
+			return false;
+	}
 	return true;
 }
 
@@ -10056,6 +10135,7 @@ static void __net_exit devlink_pernet_pre_exit(struct net *net)
 				continue;
 			err = devlink_reload(devlink, &init_net,
 					     DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+					     DEVLINK_RELOAD_LIMIT_UNSPEC,
 					     &actions_performed, NULL);
 			if (err && err != -EOPNOTSUPP)
 				pr_warn("Failed to reload devlink instance into init_net\n");
-- 
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