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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/dma/ptdma/ptdma-debugfs.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/dma/ptdma/ptdma-debugfs.c')
-rw-r--r-- | drivers/dma/ptdma/ptdma-debugfs.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/dma/ptdma/ptdma-debugfs.c b/drivers/dma/ptdma/ptdma-debugfs.c new file mode 100644 index 000000000..c8307d304 --- /dev/null +++ b/drivers/dma/ptdma/ptdma-debugfs.c @@ -0,0 +1,106 @@ +// 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); +} |