diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ntb/test/ntb_tool.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c index 1509b4c1f204..61bf2ef87e0e 100644 --- a/drivers/ntb/test/ntb_tool.c +++ b/drivers/ntb/test/ntb_tool.c @@ -59,6 +59,12 @@ * * Eg: check if clearing the doorbell mask generates an interrupt. * + * # Check the link status + * root@self# cat $DBG_DIR/link + * + * # Block until the link is up + * root@self# echo Y > $DBG_DIR/link_event + * * # Set the doorbell mask * root@self# echo 's 1' > $DBG_DIR/mask * @@ -131,6 +137,7 @@ struct tool_mw { struct tool_ctx { struct ntb_dev *ntb; struct dentry *dbgfs; + wait_queue_head_t link_wq; int mw_count; struct tool_mw mws[MAX_MWS]; }; @@ -159,6 +166,7 @@ static void tool_link_event(void *ctx) dev_dbg(&tc->ntb->dev, "link is %s speed %d width %d\n", up ? "up" : "down", speed, width); + wake_up(&tc->link_wq); } static void tool_db_event(void *ctx, int vec) @@ -473,6 +481,83 @@ static TOOL_FOPS_RDWR(tool_peer_spad_fops, tool_peer_spad_read, tool_peer_spad_write); +static ssize_t tool_link_read(struct file *filep, char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + char buf[3]; + + buf[0] = ntb_link_is_up(tc->ntb, NULL, NULL) ? 'Y' : 'N'; + buf[1] = '\n'; + buf[2] = '\0'; + + return simple_read_from_buffer(ubuf, size, offp, buf, 2); +} + +static ssize_t tool_link_write(struct file *filep, const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + char buf[32]; + size_t buf_size; + bool val; + int rc; + + buf_size = min(size, (sizeof(buf) - 1)); + if (copy_from_user(buf, ubuf, buf_size)) + return -EFAULT; + + buf[buf_size] = '\0'; + + rc = strtobool(buf, &val); + if (rc) + return rc; + + if (val) + rc = ntb_link_enable(tc->ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO); + else + rc = ntb_link_disable(tc->ntb); + + if (rc) + return rc; + + return size; +} + +static TOOL_FOPS_RDWR(tool_link_fops, + tool_link_read, + tool_link_write); + +static ssize_t tool_link_event_write(struct file *filep, + const char __user *ubuf, + size_t size, loff_t *offp) +{ + struct tool_ctx *tc = filep->private_data; + char buf[32]; + size_t buf_size; + bool val; + int rc; + + buf_size = min(size, (sizeof(buf) - 1)); + if (copy_from_user(buf, ubuf, buf_size)) + return -EFAULT; + + buf[buf_size] = '\0'; + + rc = strtobool(buf, &val); + if (rc) + return rc; + + if (wait_event_interruptible(tc->link_wq, + ntb_link_is_up(tc->ntb, NULL, NULL) == val)) + return -ERESTART; + + return size; +} + +static TOOL_FOPS_RDWR(tool_link_event_fops, + NULL, + tool_link_event_write); static ssize_t tool_mw_read(struct file *filep, char __user *ubuf, size_t size, loff_t *offp) @@ -803,6 +888,12 @@ static void tool_setup_dbgfs(struct tool_ctx *tc) debugfs_create_file("peer_spad", S_IRUSR | S_IWUSR, tc->dbgfs, tc, &tool_peer_spad_fops); + debugfs_create_file("link", S_IRUSR | S_IWUSR, tc->dbgfs, + tc, &tool_link_fops); + + debugfs_create_file("link_event", S_IWUSR, tc->dbgfs, + tc, &tool_link_event_fops); + for (i = 0; i < tc->mw_count; i++) { char buf[30]; @@ -835,6 +926,7 @@ static int tool_probe(struct ntb_client *self, struct ntb_dev *ntb) } tc->ntb = ntb; + init_waitqueue_head(&tc->link_wq); tc->mw_count = min(ntb_mw_count(tc->ntb), MAX_MWS); for (i = 0; i < tc->mw_count; i++) { |