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authorSerge Semin <fancer.lancer@gmail.com>2016-12-14 02:49:14 +0300
committerJon Mason <jdmason@kudzu.us>2017-07-06 11:30:07 -0400
commit1e5301196a88961b02fe43c73a952f78b2c84712 (patch)
treee7ea5ccf325709d0af0faf6d4f177d44a89f3371 /drivers/ntb/test/ntb_tool.c
parent60934b200ddd62187b149a7f32cc0f160c08a7ed (diff)
downloadlinux-1e5301196a88961b02fe43c73a952f78b2c84712.tar.bz2
NTB: Add indexed ports NTB API
There is some NTB hardware, which can combine more than just two domains over NTB. For instance, some IDT PCIe-switches can have NTB-functions activated on more than two-ports. The different domains are distinguished by ports they are connected to. So the new port-related methods are added to the NTB API: ntb_port_number() - return local port ntb_peer_port_count() - return number of peers local port can connect to ntb_peer_port_number(pdix) - return port number by it index ntb_peer_port_idx(port) - return port index by it number Current test-drivers aren't changed much. They still support two-ports devices for the time being while multi-ports hardware drivers aren't added. By default port-related API is declared for two-ports hardware. So corresponding hardware drivers won't need to implement it. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/test/ntb_tool.c')
-rw-r--r--drivers/ntb/test/ntb_tool.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c
index 61bf2ef87e0e..690862d90411 100644
--- a/drivers/ntb/test/ntb_tool.c
+++ b/drivers/ntb/test/ntb_tool.c
@@ -120,6 +120,8 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
#define MAX_MWS 16
+/* Only two-ports devices are supported */
+#define PIDX NTB_DEF_PEER_IDX
static struct dentry *tool_dbgfs;
@@ -919,6 +921,9 @@ static int tool_probe(struct ntb_client *self, struct ntb_dev *ntb)
if (ntb_spad_is_unsafe(ntb))
dev_dbg(&ntb->dev, "scratchpad is unsafe\n");
+ if (ntb_peer_port_count(ntb) != NTB_DEF_PEER_CNT)
+ dev_warn(&ntb->dev, "multi-port NTB is unsupported\n");
+
tc = kzalloc(sizeof(*tc), GFP_KERNEL);
if (!tc) {
rc = -ENOMEM;