diff mbox series

[11/18] thunderbolt: Use dedicated flow control for DMA tunnels

Message ID 20210304123125.43630-12-mika.westerberg@linux.intel.com (mailing list archive)
State Not Applicable
Delegated to: Netdev Maintainers
Headers show
Series thunderbolt: Align with USB4 inter-domain and DROM specs | expand

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Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count fail Series longer than 15 patches
netdev/tree_selection success Guessed tree name to be net-next
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netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns WARNING: line length of 83 exceeds 80 columns
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Mika Westerberg March 4, 2021, 12:31 p.m. UTC 
The USB4 inter-domain service spec recommends using dedicated flow
control scheme so update the driver accordingly.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/tunnel.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)
diff mbox series

Patch

diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 6557b6e07009..2e7ec037a73e 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -794,24 +794,14 @@  static u32 tb_dma_credits(struct tb_port *nhi)
 	return min(max_credits, 13U);
 }
 
-static int tb_dma_activate(struct tb_tunnel *tunnel, bool active)
-{
-	struct tb_port *nhi = tunnel->src_port;
-	u32 credits;
-
-	credits = active ? tb_dma_credits(nhi) : 0;
-	return tb_port_set_initial_credits(nhi, credits);
-}
-
-static void tb_dma_init_path(struct tb_path *path, unsigned int isb,
-			     unsigned int efc, u32 credits)
+static void tb_dma_init_path(struct tb_path *path, unsigned int efc, u32 credits)
 {
 	int i;
 
 	path->egress_fc_enable = efc;
 	path->ingress_fc_enable = TB_PATH_ALL;
 	path->egress_shared_buffer = TB_PATH_NONE;
-	path->ingress_shared_buffer = isb;
+	path->ingress_shared_buffer = TB_PATH_NONE;
 	path->priority = 5;
 	path->weight = 1;
 	path->clear_fc = true;
@@ -856,7 +846,6 @@  struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
 	if (!tunnel)
 		return NULL;
 
-	tunnel->activate = tb_dma_activate;
 	tunnel->src_port = nhi;
 	tunnel->dst_port = dst;
 
@@ -869,8 +858,7 @@  struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
 			tb_tunnel_free(tunnel);
 			return NULL;
 		}
-		tb_dma_init_path(path, TB_PATH_NONE, TB_PATH_SOURCE | TB_PATH_INTERNAL,
-				 credits);
+		tb_dma_init_path(path, TB_PATH_SOURCE | TB_PATH_INTERNAL, credits);
 		tunnel->paths[i++] = path;
 	}
 
@@ -881,7 +869,7 @@  struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
 			tb_tunnel_free(tunnel);
 			return NULL;
 		}
-		tb_dma_init_path(path, TB_PATH_SOURCE, TB_PATH_ALL, credits);
+		tb_dma_init_path(path, TB_PATH_ALL, credits);
 		tunnel->paths[i++] = path;
 	}