netdev - [PATCH net-next 5/6] mlxsw: pci: Move software reset code to a separate function

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Message-ID: <b3ca40f2076f96c10f9275ffdac318033f273a99.1679502371.git.petrm@nvidia.com>
Date:   Wed, 22 Mar 2023 17:49:34 +0100
From:   Petr Machata <petrm@...dia.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, <netdev@...r.kernel.org>
CC:     Ido Schimmel <idosch@...dia.com>, Amit Cohen <amcohen@...dia.com>,
        "Petr Machata" <petrm@...dia.com>, <mlxsw@...dia.com>
Subject: [PATCH net-next 5/6] mlxsw: pci: Move software reset code to a separate function

From: Amit Cohen <amcohen@...dia.com>

In general, the existing flow of software reset in the driver is:
1. Wait for system ready status.
2. Send MRSR command, to start the reset.
3. Wait for system ready status.

This flow will be extended once a new reset command is supported. As a
preparation, move step #2 to a separate function.

Signed-off-by: Amit Cohen <amcohen@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
Signed-off-by: Petr Machata <petrm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/pci.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index a2d3b2ae00ad..73ae2fdd94c4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1459,11 +1459,18 @@ static int mlxsw_pci_sys_ready_wait(struct mlxsw_pci *mlxsw_pci,
 	return -EBUSY;
 }
 
-static int
-mlxsw_pci_reset(struct mlxsw_pci *mlxsw_pci, const struct pci_device_id *id)
+static int mlxsw_pci_reset_sw(struct mlxsw_pci *mlxsw_pci)
 {
-	struct pci_dev *pdev = mlxsw_pci->pdev;
 	char mrsr_pl[MLXSW_REG_MRSR_LEN];
+
+	mlxsw_reg_mrsr_pack(mrsr_pl, MLXSW_REG_MRSR_COMMAND_SOFTWARE_RESET);
+	return mlxsw_reg_write(mlxsw_pci->core, MLXSW_REG(mrsr), mrsr_pl);
+}
+
+static int
+mlxsw_pci_reset(struct mlxsw_pci *mlxsw_pci, const struct pci_device_id *id)
+{
+	struct pci_dev *pdev = mlxsw_pci->pdev;
 	u32 sys_status;
 	int err;
 
@@ -1474,8 +1481,7 @@ mlxsw_pci_reset(struct mlxsw_pci *mlxsw_pci, const struct pci_device_id *id)
 		return err;
 	}
 
-	mlxsw_reg_mrsr_pack(mrsr_pl, MLXSW_REG_MRSR_COMMAND_SOFTWARE_RESET);
-	err = mlxsw_reg_write(mlxsw_pci->core, MLXSW_REG(mrsr), mrsr_pl);
+	err = mlxsw_pci_reset_sw(mlxsw_pci);
 	if (err)
 		return err;
 
-- 
2.39.0