netdev - [PATCH net-next 09/14] mlxsw: Extend MRSR pack() function to support new commands

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Date: Wed, 15 Nov 2023 13:17:18 +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>, Petr Machata <petrm@...dia.com>, "Amit
 Cohen" <amcohen@...dia.com>, <mlxsw@...dia.com>
Subject: [PATCH net-next 09/14] mlxsw: Extend MRSR pack() function to support new commands

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

Currently mlxsw_reg_mrsr_pack() always sets 'command=1'. As preparation for
support of new reset flow, pass the command as an argument to the
function and add an enum for this field.

For now, always pass 'command=1' to the pack() function.

Signed-off-by: Amit Cohen <amcohen@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
Signed-off-by: Petr Machata <petrm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/pci.c |  2 +-
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index e4b25e187467..7af37f78ed1a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1491,7 +1491,7 @@ static int mlxsw_pci_sw_reset(struct mlxsw_pci *mlxsw_pci,
 		return err;
 	}
 
-	mlxsw_reg_mrsr_pack(mrsr_pl);
+	mlxsw_reg_mrsr_pack(mrsr_pl, MLXSW_REG_MRSR_COMMAND_SOFTWARE_RESET);
 	err = mlxsw_reg_write(mlxsw_pci->core, MLXSW_REG(mrsr), mrsr_pl);
 	if (err)
 		return err;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 25b294fdeb3d..13c0ff994537 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -10122,6 +10122,15 @@ mlxsw_reg_mgir_unpack(char *payload, u32 *hw_rev, char *fw_info_psid,
 
 MLXSW_REG_DEFINE(mrsr, MLXSW_REG_MRSR_ID, MLXSW_REG_MRSR_LEN);
 
+enum mlxsw_reg_mrsr_command {
+	/* Switch soft reset, does not reset PCI firmware. */
+	MLXSW_REG_MRSR_COMMAND_SOFTWARE_RESET = 1,
+	/* Reset will be done when PCI link will be disabled.
+	 * This command will reset PCI firmware also.
+	 */
+	MLXSW_REG_MRSR_COMMAND_RESET_AT_PCI_DISABLE = 6,
+};
+
 /* reg_mrsr_command
  * Reset/shutdown command
  * 0 - do nothing
@@ -10130,10 +10139,11 @@ MLXSW_REG_DEFINE(mrsr, MLXSW_REG_MRSR_ID, MLXSW_REG_MRSR_LEN);
  */
 MLXSW_ITEM32(reg, mrsr, command, 0x00, 0, 4);
 
-static inline void mlxsw_reg_mrsr_pack(char *payload)
+static inline void mlxsw_reg_mrsr_pack(char *payload,
+				       enum mlxsw_reg_mrsr_command command)
 {
 	MLXSW_REG_ZERO(mrsr, payload);
-	mlxsw_reg_mrsr_command_set(payload, 1);
+	mlxsw_reg_mrsr_command_set(payload, command);
 }
 
 /* MLCR - Management LED Control Register
-- 
2.41.0