diff options
Diffstat (limited to 'drivers/thunderbolt/tunnel.c')
| -rw-r--r-- | drivers/thunderbolt/tunnel.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index dd3b5613ad2c..3bf2628a5dcd 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -41,9 +41,14 @@ * Number of credits we try to allocate for each DMA path if not limited * by the host router baMaxHI. */ -#define TB_DMA_CREDITS 14U +#define TB_DMA_CREDITS 14 /* Minimum number of credits for DMA path */ -#define TB_MIN_DMA_CREDITS 1U +#define TB_MIN_DMA_CREDITS 1 + +static unsigned int dma_credits = TB_DMA_CREDITS; +module_param(dma_credits, uint, 0444); +MODULE_PARM_DESC(dma_credits, "specify custom credits for DMA tunnels (default: " + __MODULE_STRING(TB_DMA_CREDITS) ")"); static bool bw_alloc_mode = true; module_param(bw_alloc_mode, bool, 0444); @@ -95,7 +100,7 @@ static unsigned int tb_available_credits(const struct tb_port *port, pcie = tb_acpi_may_tunnel_pcie() ? sw->max_pcie_credits : 0; if (tb_acpi_is_xdomain_allowed()) { - spare = min_not_zero(sw->max_dma_credits, TB_DMA_CREDITS); + spare = min_not_zero(sw->max_dma_credits, dma_credits); /* Add some credits for potential second DMA tunnel */ spare += TB_MIN_DMA_CREDITS; } else { @@ -1472,7 +1477,7 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, tunnel->dst_port = dst; tunnel->deinit = tb_dma_deinit; - credits = min_not_zero(TB_DMA_CREDITS, nhi->sw->max_dma_credits); + credits = min_not_zero(dma_credits, nhi->sw->max_dma_credits); if (receive_ring > 0) { path = tb_path_alloc(tb, dst, receive_path, nhi, receive_ring, 0, |