1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Intel MIC Platform Software Stack (MPSS)
  4 *
  5 * Copyright(c) 2013 Intel Corporation.
  6 *
  7 * Intel MIC Host driver.
  8 */
  9#include <linux/debugfs.h>
 10#include <linux/pci.h>
 11#include <linux/seq_file.h>
 12
 13#include <linux/mic_common.h>
 14#include "../common/mic_dev.h"
 15#include "mic_device.h"
 16#include "mic_smpt.h"
 17
 18/* Debugfs parent dir */
 19static struct dentry *mic_dbg;
 20
 21static int mic_smpt_show(struct seq_file *s, void *pos)
 22{
 23	int i;
 24	struct mic_device *mdev = s->private;
 25	unsigned long flags;
 26
 27	seq_printf(s, "MIC %-2d |%-10s| %-14s %-10s\n",
 28		   mdev->id, "SMPT entry", "SW DMA addr", "RefCount");
 29	seq_puts(s, "====================================================\n");
 30
 31	if (mdev->smpt) {
 32		struct mic_smpt_info *smpt_info = mdev->smpt;
 33		spin_lock_irqsave(&smpt_info->smpt_lock, flags);
 34		for (i = 0; i < smpt_info->info.num_reg; i++) {
 35			seq_printf(s, "%9s|%-10d| %-#14llx %-10lld\n",
 36				   " ",  i, smpt_info->entry[i].dma_addr,
 37				   smpt_info->entry[i].ref_count);
 38		}
 39		spin_unlock_irqrestore(&smpt_info->smpt_lock, flags);
 40	}
 41	seq_puts(s, "====================================================\n");
 42	return 0;
 43}
 44
 45DEFINE_SHOW_ATTRIBUTE(mic_smpt);
 46
 47static int mic_post_code_show(struct seq_file *s, void *pos)
 48{
 49	struct mic_device *mdev = s->private;
 50	u32 reg = mdev->ops->get_postcode(mdev);
 51
 52	seq_printf(s, "%c%c", reg & 0xff, (reg >> 8) & 0xff);
 53	return 0;
 54}
 55
 56DEFINE_SHOW_ATTRIBUTE(mic_post_code);
 57
 58static int mic_msi_irq_info_show(struct seq_file *s, void *pos)
 59{
 60	struct mic_device *mdev  = s->private;
 61	int reg;
 62	int i, j;
 63	u16 entry;
 64	u16 vector;
 65	struct pci_dev *pdev = mdev->pdev;
 66
 67	if (pci_dev_msi_enabled(pdev)) {
 68		for (i = 0; i < mdev->irq_info.num_vectors; i++) {
 69			if (pdev->msix_enabled) {
 70				entry = mdev->irq_info.msix_entries[i].entry;
 71				vector = mdev->irq_info.msix_entries[i].vector;
 72			} else {
 73				entry = 0;
 74				vector = pdev->irq;
 75			}
 76
 77			reg = mdev->intr_ops->read_msi_to_src_map(mdev, entry);
 78
 79			seq_printf(s, "%s %-10d %s %-10d MXAR[%d]: %08X\n",
 80				   "IRQ:", vector, "Entry:", entry, i, reg);
 81
 82			seq_printf(s, "%-10s", "offset:");
 83			for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
 84				seq_printf(s, "%4d ", j);
 85			seq_puts(s, "\n");
 86
 87
 88			seq_printf(s, "%-10s", "count:");
 89			for (j = (MIC_NUM_OFFSETS - 1); j >= 0; j--)
 90				seq_printf(s, "%4d ",
 91					   (mdev->irq_info.mic_msi_map[i] &
 92					   BIT(j)) ? 1 : 0);
 93			seq_puts(s, "\n\n");
 94		}
 95	} else {
 96		seq_puts(s, "MSI/MSIx interrupts not enabled\n");
 97	}
 98
 99	return 0;
100}
101
102DEFINE_SHOW_ATTRIBUTE(mic_msi_irq_info);
103
104/**
105 * mic_create_debug_dir - Initialize MIC debugfs entries.
106 */
107void mic_create_debug_dir(struct mic_device *mdev)
108{
109	char name[16];
110
111	if (!mic_dbg)
112		return;
113
114	scnprintf(name, sizeof(name), "mic%d", mdev->id);
115	mdev->dbg_dir = debugfs_create_dir(name, mic_dbg);
116
117	debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev,
118			    &mic_smpt_fops);
119
120	debugfs_create_file("post_code", 0444, mdev->dbg_dir, mdev,
121			    &mic_post_code_fops);
122
123	debugfs_create_file("msi_irq_info", 0444, mdev->dbg_dir, mdev,
124			    &mic_msi_irq_info_fops);
125}
126
127/**
128 * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
129 */
130void mic_delete_debug_dir(struct mic_device *mdev)
131{
132	if (!mdev->dbg_dir)
133		return;
134
135	debugfs_remove_recursive(mdev->dbg_dir);
136}
137
138/**
139 * mic_init_debugfs - Initialize global debugfs entry.
140 */
141void __init mic_init_debugfs(void)
142{
143	mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
144}
145
146/**
147 * mic_exit_debugfs - Uninitialize global debugfs entry
148 */
149void mic_exit_debugfs(void)
150{
151	debugfs_remove(mic_dbg);
152}