diff options
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 1de1afa24182..ecf53d986a5c 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -556,6 +556,28 @@ int tb_port_add_nfc_credits(struct tb_port *port, int credits) } /** + * tb_port_set_initial_credits() - Set initial port link credits allocated + * @port: Port to set the initial credits + * @credits: Number of credits to to allocate + * + * Set initial credits value to be used for ingress shared buffering. + */ +int tb_port_set_initial_credits(struct tb_port *port, u32 credits) +{ + u32 data; + int ret; + + ret = tb_port_read(port, &data, TB_CFG_PORT, 5, 1); + if (ret) + return ret; + + data &= ~TB_PORT_LCA_MASK; + data |= (credits << TB_PORT_LCA_SHIFT) & TB_PORT_LCA_MASK; + + return tb_port_write(port, &data, TB_CFG_PORT, 5, 1); +} + +/** * tb_port_clear_counter() - clear a counter in TB_CFG_COUNTER * * Return: Returns 0 on success or an error code on failure. |