1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Intel MIC Platform Software Stack (MPSS)
  4 *
  5 * Copyright(c) 2014 Intel Corporation.
  6 *
  7 * Intel SCIF driver.
  8 */
  9#include <linux/debugfs.h>
 10#include <linux/seq_file.h>
 11
 12#include "../common/mic_dev.h"
 13#include "scif_main.h"
 14
 15/* Debugfs parent dir */
 16static struct dentry *scif_dbg;
 17
 18static int scif_dev_show(struct seq_file *s, void *unused)
 19{
 20	int node;
 21
 22	seq_printf(s, "Total Nodes %d Self Node Id %d Maxid %d\n",
 23		   scif_info.total, scif_info.nodeid,
 24		   scif_info.maxid);
 25
 26	if (!scif_dev)
 27		return 0;
 28
 29	seq_printf(s, "%-16s\t%-16s\n", "node_id", "state");
 30
 31	for (node = 0; node <= scif_info.maxid; node++)
 32		seq_printf(s, "%-16d\t%-16s\n", scif_dev[node].node,
 33			   _scifdev_alive(&scif_dev[node]) ?
 34			   "Running" : "Offline");
 35	return 0;
 36}
 37
 38DEFINE_SHOW_ATTRIBUTE(scif_dev);
 39
 40static void scif_display_window(struct scif_window *window, struct seq_file *s)
 41{
 42	int j;
 43	struct scatterlist *sg;
 44	scif_pinned_pages_t pin = window->pinned_pages;
 45
 46	seq_printf(s, "window %p type %d temp %d offset 0x%llx ",
 47		   window, window->type, window->temp, window->offset);
 48	seq_printf(s, "nr_pages 0x%llx nr_contig_chunks 0x%x prot %d ",
 49		   window->nr_pages, window->nr_contig_chunks, window->prot);
 50	seq_printf(s, "ref_count %d magic 0x%llx peer_window 0x%llx ",
 51		   window->ref_count, window->magic, window->peer_window);
 52	seq_printf(s, "unreg_state 0x%x va_for_temp 0x%lx\n",
 53		   window->unreg_state, window->va_for_temp);
 54
 55	for (j = 0; j < window->nr_contig_chunks; j++)
 56		seq_printf(s, "page[%d] dma_addr 0x%llx num_pages 0x%llx\n", j,
 57			   window->dma_addr[j], window->num_pages[j]);
 58
 59	if (window->type == SCIF_WINDOW_SELF && pin)
 60		for (j = 0; j < window->nr_pages; j++)
 61			seq_printf(s, "page[%d] = pinned_pages %p address %p\n",
 62				   j, pin->pages[j],
 63				   page_address(pin->pages[j]));
 64
 65	if (window->st)
 66		for_each_sg(window->st->sgl, sg, window->st->nents, j)
 67			seq_printf(s, "sg[%d] dma addr 0x%llx length 0x%x\n",
 68				   j, sg_dma_address(sg), sg_dma_len(sg));
 69}
 70
 71static void scif_display_all_windows(struct list_head *head, struct seq_file *s)
 72{
 73	struct list_head *item;
 74	struct scif_window *window;
 75
 76	list_for_each(item, head) {
 77		window = list_entry(item, struct scif_window, list);
 78		scif_display_window(window, s);
 79	}
 80}
 81
 82static int scif_rma_show(struct seq_file *s, void *unused)
 83{
 84	struct scif_endpt *ep;
 85	struct list_head *pos;
 86
 87	mutex_lock(&scif_info.connlock);
 88	list_for_each(pos, &scif_info.connected) {
 89		ep = list_entry(pos, struct scif_endpt, list);
 90		seq_printf(s, "ep %p self windows\n", ep);
 91		mutex_lock(&ep->rma_info.rma_lock);
 92		scif_display_all_windows(&ep->rma_info.reg_list, s);
 93		seq_printf(s, "ep %p remote windows\n", ep);
 94		scif_display_all_windows(&ep->rma_info.remote_reg_list, s);
 95		mutex_unlock(&ep->rma_info.rma_lock);
 96	}
 97	mutex_unlock(&scif_info.connlock);
 98	return 0;
 99}
100
101DEFINE_SHOW_ATTRIBUTE(scif_rma);
102
103void __init scif_init_debugfs(void)
104{
105	scif_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
106
107	debugfs_create_file("scif_dev", 0444, scif_dbg, NULL, &scif_dev_fops);
108	debugfs_create_file("scif_rma", 0444, scif_dbg, NULL, &scif_rma_fops);
109	debugfs_create_u8("en_msg_log", 0666, scif_dbg, &scif_info.en_msg_log);
110	debugfs_create_u8("p2p_enable", 0666, scif_dbg, &scif_info.p2p_enable);
111}
112
113void scif_exit_debugfs(void)
114{
115	debugfs_remove_recursive(scif_dbg);
116}