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authorShalom Toledo <shalomt@mellanox.com>2019-06-11 18:45:06 +0300
committerDavid S. Miller <davem@davemloft.net>2019-06-14 08:34:55 +0300
commit8289169dd26291ea6c12b8aad78587ad695ec78e (patch)
tree88fe2e1664c529f580dd90da3ac132df014d8a7e /drivers/net/ethernet/mellanox/mlxsw/pci.c
parent34dacb4d519deff74baf2049634c934e8c54e997 (diff)
downloadlinux-8289169dd26291ea6c12b8aad78587ad695ec78e.tar.xz
mlxsw: pci: Query free running clock PCI BAR and offsets
Query free running clock PCI BAR and offsets during the pci_init. Signed-off-by: Shalom Toledo <shalomt@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/pci.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/pci.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index b40455f8293d..6acb9bbfdf89 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -102,6 +102,7 @@ struct mlxsw_pci_queue_type_group {
struct mlxsw_pci {
struct pci_dev *pdev;
u8 __iomem *hw_addr;
+ u64 free_running_clock_offset;
struct mlxsw_pci_queue_type_group queues[MLXSW_PCI_QUEUE_TYPE_COUNT];
u32 doorbell_offset;
struct mlxsw_core *core;
@@ -1414,6 +1415,15 @@ static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
mlxsw_pci->doorbell_offset =
mlxsw_cmd_mbox_query_fw_doorbell_page_offset_get(mbox);
+ if (mlxsw_cmd_mbox_query_fw_fr_rn_clk_bar_get(mbox) != 0) {
+ dev_err(&pdev->dev, "Unsupported free running clock BAR queried from hw\n");
+ err = -EINVAL;
+ goto err_fr_rn_clk_bar;
+ }
+
+ mlxsw_pci->free_running_clock_offset =
+ mlxsw_cmd_mbox_query_fw_free_running_clock_offset_get(mbox);
+
num_pages = mlxsw_cmd_mbox_query_fw_fw_pages_get(mbox);
err = mlxsw_pci_fw_area_init(mlxsw_pci, mbox, num_pages);
if (err)
@@ -1469,6 +1479,7 @@ err_query_resources:
err_boardinfo:
mlxsw_pci_fw_area_fini(mlxsw_pci);
err_fw_area_init:
+err_fr_rn_clk_bar:
err_doorbell_page_bar:
err_iface_rev:
err_query_fw:
@@ -1672,6 +1683,24 @@ static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
return err;
}
+static u32 mlxsw_pci_read_frc_h(void *bus_priv)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ u64 frc_offset;
+
+ frc_offset = mlxsw_pci->free_running_clock_offset;
+ return mlxsw_pci_read32(mlxsw_pci, FREE_RUNNING_CLOCK_H(frc_offset));
+}
+
+static u32 mlxsw_pci_read_frc_l(void *bus_priv)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ u64 frc_offset;
+
+ frc_offset = mlxsw_pci->free_running_clock_offset;
+ return mlxsw_pci_read32(mlxsw_pci, FREE_RUNNING_CLOCK_L(frc_offset));
+}
+
static const struct mlxsw_bus mlxsw_pci_bus = {
.kind = "pci",
.init = mlxsw_pci_init,
@@ -1679,6 +1708,8 @@ static const struct mlxsw_bus mlxsw_pci_bus = {
.skb_transmit_busy = mlxsw_pci_skb_transmit_busy,
.skb_transmit = mlxsw_pci_skb_transmit,
.cmd_exec = mlxsw_pci_cmd_exec,
+ .read_frc_h = mlxsw_pci_read_frc_h,
+ .read_frc_l = mlxsw_pci_read_frc_l,
.features = MLXSW_BUS_F_TXRX | MLXSW_BUS_F_RESET,
};
@@ -1740,6 +1771,7 @@ static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
mlxsw_pci->bus_info.device_kind = driver_name;
mlxsw_pci->bus_info.device_name = pci_name(mlxsw_pci->pdev);
mlxsw_pci->bus_info.dev = &pdev->dev;
+ mlxsw_pci->bus_info.read_frc_capable = true;
mlxsw_pci->id = id;
err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,