tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}