From 9f637f7936025aef57f247b11036bad18bb87c06 Mon Sep 17 00:00:00 2001 From: Upinder Malhi Date: Thu, 9 Jan 2014 15:40:58 -0800 Subject: IB/usnic: Expose flows via debugfs Signed-off-by: Upinder Malhi Signed-off-by: Roland Dreier --- drivers/infiniband/hw/usnic/usnic_debugfs.c | 91 ++++++++++++++++++++++++++++- 1 file changed, 89 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband/hw/usnic/usnic_debugfs.c') diff --git a/drivers/infiniband/hw/usnic/usnic_debugfs.c b/drivers/infiniband/hw/usnic/usnic_debugfs.c index 91386df025ae..6cb2e7ca7df2 100644 --- a/drivers/infiniband/hw/usnic/usnic_debugfs.c +++ b/drivers/infiniband/hw/usnic/usnic_debugfs.c @@ -22,8 +22,11 @@ #include "usnic.h" #include "usnic_log.h" #include "usnic_debugfs.h" +#include "usnic_ib_qp_grp.h" +#include "usnic_transport.h" static struct dentry *debugfs_root; +static struct dentry *flows_dentry; static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data, size_t count, loff_t *ppos) @@ -48,17 +51,73 @@ static const struct file_operations usnic_debugfs_buildinfo_ops = { .read = usnic_debugfs_buildinfo_read }; +static ssize_t flowinfo_read(struct file *f, char __user *data, + size_t count, loff_t *ppos) +{ + struct usnic_ib_qp_grp_flow *qp_flow; + int n; + int left; + char *ptr; + char buf[512]; + + qp_flow = f->private_data; + ptr = buf; + left = count; + + if (*ppos > 0) + return 0; + + spin_lock(&qp_flow->qp_grp->lock); + n = scnprintf(ptr, left, + "QP Grp ID: %d Transport: %s ", + qp_flow->qp_grp->grp_id, + usnic_transport_to_str(qp_flow->trans_type)); + UPDATE_PTR_LEFT(n, ptr, left); + if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) { + n = scnprintf(ptr, left, "Port_Num:%hu\n", + qp_flow->usnic_roce.port_num); + UPDATE_PTR_LEFT(n, ptr, left); + } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) { + n = usnic_transport_sock_to_str(ptr, left, + qp_flow->udp.sock); + UPDATE_PTR_LEFT(n, ptr, left); + n = scnprintf(ptr, left, "\n"); + UPDATE_PTR_LEFT(n, ptr, left); + } + spin_unlock(&qp_flow->qp_grp->lock); + + return simple_read_from_buffer(data, count, ppos, buf, ptr - buf); +} + +static const struct file_operations flowinfo_ops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = flowinfo_read, +}; + void usnic_debugfs_init(void) { debugfs_root = debugfs_create_dir(DRV_NAME, NULL); if (IS_ERR(debugfs_root)) { usnic_err("Failed to create debugfs root dir, check if debugfs is enabled in kernel configuration\n"); - debugfs_root = NULL; - return; + goto out_clear_root; + } + + flows_dentry = debugfs_create_dir("flows", debugfs_root); + if (IS_ERR_OR_NULL(flows_dentry)) { + usnic_err("Failed to create debugfs flow dir with err %ld\n", + PTR_ERR(flows_dentry)); + goto out_free_root; } debugfs_create_file("build-info", S_IRUGO, debugfs_root, NULL, &usnic_debugfs_buildinfo_ops); + return; + +out_free_root: + debugfs_remove_recursive(debugfs_root); +out_clear_root: + debugfs_root = NULL; } void usnic_debugfs_exit(void) @@ -69,3 +128,31 @@ void usnic_debugfs_exit(void) debugfs_remove_recursive(debugfs_root); debugfs_root = NULL; } + +void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow) +{ + struct usnic_ib_qp_grp *qp_grp; + + if (IS_ERR_OR_NULL(flows_dentry)) + return; + + qp_grp = qp_flow->qp_grp; + + scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name), + "%u", qp_flow->flow->flow_id); + qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name, + S_IRUGO, + flows_dentry, + qp_flow, + &flowinfo_ops); + if (IS_ERR_OR_NULL(qp_flow->dbgfs_dentry)) { + usnic_err("Failed to create dbg fs entry for flow %u\n", + qp_flow->flow->flow_id); + } +} + +void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow) +{ + if (!IS_ERR_OR_NULL(qp_flow->dbgfs_dentry)) + debugfs_remove(qp_flow->dbgfs_dentry); +} -- cgit v1.2.3