Commit 9f637f79 authored by Upinder Malhi's avatar Upinder Malhi Committed by Roland Dreier
Browse files

IB/usnic: Expose flows via debugfs 



Signed-off-by: default avatarUpinder Malhi <umalhi@cisco.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent c5f855e0

drivers/infiniband/hw/usnic/usnic_debugfs.c

+89 −2
Original line number Diff line number Diff line
@@ -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);

}

drivers/infiniband/hw/usnic/usnic_debugfs.h

+4 −0
Original line number Diff line number Diff line
@@ -18,8 +18,12 @@ 
#ifndef USNIC_DEBUGFS_H_

#define USNIC_DEBUGFS_H_



#include "usnic_ib_qp_grp.h"



void usnic_debugfs_init(void);



void usnic_debugfs_exit(void);

void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow);

void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow);



#endif /*!USNIC_DEBUGFS_H_ */

drivers/infiniband/hw/usnic/usnic_ib.h

+7 −0
Original line number Diff line number Diff line
@@ -109,4 +109,11 @@ struct usnic_ib_mr *to_umr(struct ib_mr *ibmr) 
	return container_of(ibmr, struct usnic_ib_mr, ibmr);

}

void usnic_ib_log_vf(struct usnic_ib_vf *vf);



#define UPDATE_PTR_LEFT(N, P, L)			\

do {							\

	L -= (N);					\

	P += (N);					\

} while (0)



#endif /* USNIC_IB_H_ */

drivers/infiniband/hw/usnic/usnic_ib_qp_grp.c

+6 −2
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include "usnic_vnic.h"

#include "usnic_fwd.h"

#include "usnic_uiom.h"

#include "usnic_debugfs.h"

#include "usnic_ib_qp_grp.h"

#include "usnic_ib_sysfs.h"

#include "usnic_transport.h"
@@ -340,8 +341,10 @@ create_and_add_flow(struct usnic_ib_qp_grp *qp_grp, 
		return ERR_PTR(-EINVAL);

	}



	if (!IS_ERR_OR_NULL(qp_flow))

	if (!IS_ERR_OR_NULL(qp_flow)) {

		list_add_tail(&qp_flow->link, &qp_grp->flows_lst);

		usnic_debugfs_flow_add(qp_flow);

	}





	return qp_flow;
@@ -349,6 +352,7 @@ create_and_add_flow(struct usnic_ib_qp_grp *qp_grp, 


static void release_and_remove_flow(struct usnic_ib_qp_grp_flow *qp_flow)

{

	usnic_debugfs_flow_remove(qp_flow);

	list_del(&qp_flow->link);



	switch (qp_flow->trans_type) {
@@ -728,9 +732,9 @@ void usnic_ib_qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp) 
	WARN_ON(qp_grp->state != IB_QPS_RESET);

	lockdep_assert_held(&qp_grp->vf->lock);



	release_and_remove_all_flows(qp_grp);

	usnic_ib_sysfs_qpn_remove(qp_grp);

	qp_grp_and_vf_unbind(qp_grp);

	release_and_remove_all_flows(qp_grp);

	free_qp_grp_res(qp_grp->res_chunk_list);

	kfree(qp_grp);

}

drivers/infiniband/hw/usnic/usnic_ib_qp_grp.h

+5 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#ifndef USNIC_IB_QP_GRP_H_

#define USNIC_IB_QP_GRP_H_



#include <linux/debugfs.h>

#include <rdma/ib_verbs.h>



#include "usnic_ib.h"
@@ -62,6 +63,10 @@ struct usnic_ib_qp_grp_flow { 
	};

	struct usnic_ib_qp_grp		*qp_grp;

	struct list_head		link;



	/* Debug FS */

	struct dentry			*dbgfs_dentry;

	char				dentry_name[32];

};



static const struct