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authorGary R Hook <gary.hook@amd.com>2017-05-09 09:33:36 -0500
committerJon Mason <jdmason@kudzu.us>2017-07-06 11:30:08 -0400
commit8407dd6c16c0d92432323c0ce8daecd13e424703 (patch)
tree85ffee40d04b0a05cd816e2142a2066b140d2ca4 /drivers/ntb
parent0b93a6dbec96be880a3d58a683669b4a75beee1d (diff)
downloadlinux-8407dd6c16c0d92432323c0ce8daecd13e424703.tar.bz2
ntb: Add more debugfs support for ntb_perf testing options
The ntb_perf tool uses module parameters to control the characteristics of its test. Enable the changing of these options through debugfs, and eliminating the need to unload and reload the module to make changes and run additional tests. Add a new module parameter that forces the DMA channel selection onto the same node as the NTB device (default: true). - seg_order: Size of the NTB memory window; power of 2. - run_order: Size of the data buffer; power of 2. - use_dma: Use DMA or memcpy? Default: 0. - on_node: Only use DMA channel(s) on the NTB node. Default: true. Signed-off-by: Gary R Hook <gary.hook@amd.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/test/ntb_perf.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 60e0dd320aef..6fdddf86269e 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -737,6 +737,10 @@ static int perf_debugfs_setup(struct perf_ctx *perf)
struct dentry *debugfs_node_dir;
struct dentry *debugfs_run;
struct dentry *debugfs_threads;
+ struct dentry *debugfs_seg_order;
+ struct dentry *debugfs_run_order;
+ struct dentry *debugfs_use_dma;
+ struct dentry *debugfs_on_node;
if (!debugfs_initialized())
return -ENODEV;
@@ -764,6 +768,30 @@ static int perf_debugfs_setup(struct perf_ctx *perf)
if (!debugfs_threads)
return -ENODEV;
+ debugfs_seg_order = debugfs_create_u32("seg_order", 0600,
+ debugfs_node_dir,
+ &seg_order);
+ if (!debugfs_seg_order)
+ return -ENODEV;
+
+ debugfs_run_order = debugfs_create_u32("run_order", 0600,
+ debugfs_node_dir,
+ &run_order);
+ if (!debugfs_run_order)
+ return -ENODEV;
+
+ debugfs_use_dma = debugfs_create_bool("use_dma", 0600,
+ debugfs_node_dir,
+ &use_dma);
+ if (!debugfs_use_dma)
+ return -ENODEV;
+
+ debugfs_on_node = debugfs_create_bool("on_node", 0600,
+ debugfs_node_dir,
+ &on_node);
+ if (!debugfs_on_node)
+ return -ENODEV;
+
return 0;
}