diff options
Diffstat (limited to 'drivers/ntb/test/ntb_perf.c')
| -rw-r--r-- | drivers/ntb/test/ntb_perf.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c index 8dfce9c9aad0..30635c89320c 100644 --- a/drivers/ntb/test/ntb_perf.c +++ b/drivers/ntb/test/ntb_perf.c @@ -83,6 +83,10 @@ MODULE_DESCRIPTION(DRIVER_DESCRIPTION); static struct dentry *perf_debugfs_dir; +static unsigned long max_mw_size; +module_param(max_mw_size, ulong, 0644); +MODULE_PARM_DESC(max_mw_size, "Limit size of large memory windows"); + static unsigned int seg_order = 19; /* 512K */ module_param(seg_order, uint, 0644); MODULE_PARM_DESC(seg_order, "size order [n^2] of buffer segment for testing"); @@ -472,6 +476,10 @@ static void perf_link_work(struct work_struct *work) dev_dbg(&perf->ntb->pdev->dev, "%s called\n", __func__); size = perf->mw.phys_size; + + if (max_mw_size && size > max_mw_size) + size = max_mw_size; + ntb_peer_spad_write(ndev, MW_SZ_HIGH, upper_32_bits(size)); ntb_peer_spad_write(ndev, MW_SZ_LOW, lower_32_bits(size)); ntb_peer_spad_write(ndev, VERSION, PERF_VERSION); |