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// SPDX-License-Identifier: GPL-2.0-only
/*
* AMD Passthrough DMA device driver
* -- Based on the CCP driver
*
* Copyright (C) 2016,2021 Advanced Micro Devices, Inc.
*
* Author: Sanjay R Mehta <sanju.mehta@amd.com>
* Author: Gary R Hook <gary.hook@amd.com>
*/
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include "ptdma.h"
/* DebugFS helpers */
#define RI_VERSION_NUM 0x0000003F
#define RI_NUM_VQM 0x00078000
#define RI_NVQM_SHIFT 15
static int pt_debugfs_info_show(struct seq_file *s, void *p)
{
struct pt_device *pt = s->private;
unsigned int regval;
seq_printf(s, "Device name: %s\n", dev_name(pt->dev));
seq_printf(s, " # Queues: %d\n", 1);
seq_printf(s, " # Cmds: %d\n", pt->cmd_count);
regval = ioread32(pt->io_regs + CMD_PT_VERSION);
seq_printf(s, " Version: %d\n", regval & RI_VERSION_NUM);
seq_puts(s, " Engines:");
seq_puts(s, "\n");
seq_printf(s, " Queues: %d\n", (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);
return 0;
}
/*
* Return a formatted buffer containing the current
* statistics of queue for PTDMA
*/
static int pt_debugfs_stats_show(struct seq_file *s, void *p)
{
struct pt_device *pt = s->private;
seq_printf(s, "Total Interrupts Handled: %ld\n", pt->total_interrupts);
return 0;
}
static int pt_debugfs_queue_show(struct seq_file *s, void *p)
{
struct pt_cmd_queue *cmd_q = s->private;
unsigned int regval;
if (!cmd_q)
return 0;
seq_printf(s, " Pass-Thru: %ld\n", cmd_q->total_pt_ops);
regval = ioread32(cmd_q->reg_control + 0x000C);
seq_puts(s, " Enabled Interrupts:");
if (regval & INT_EMPTY_QUEUE)
seq_puts(s, " EMPTY");
if (regval & INT_QUEUE_STOPPED)
seq_puts(s, " STOPPED");
if (regval & INT_ERROR)
seq_puts(s, " ERROR");
if (regval & INT_COMPLETION)
seq_puts(s, " COMPLETION");
seq_puts(s, "\n");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(pt_debugfs_info);
DEFINE_SHOW_ATTRIBUTE(pt_debugfs_queue);
DEFINE_SHOW_ATTRIBUTE(pt_debugfs_stats);
void ptdma_debugfs_setup(struct pt_device *pt)
{
struct pt_cmd_queue *cmd_q;
struct dentry *debugfs_q_instance;
if (!debugfs_initialized())
return;
debugfs_create_file("info", 0400, pt->dma_dev.dbg_dev_root, pt,
&pt_debugfs_info_fops);
debugfs_create_file("stats", 0400, pt->dma_dev.dbg_dev_root, pt,
&pt_debugfs_stats_fops);
cmd_q = &pt->cmd_q;
debugfs_q_instance =
debugfs_create_dir("q", pt->dma_dev.dbg_dev_root);
debugfs_create_file("stats", 0400, debugfs_q_instance, cmd_q,
&pt_debugfs_queue_fops);
}
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