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