blob: 3bdcb8056a3661dd61c2bd248f02536fa645424c [file] [log] [blame]
* Qualcomm Technologies HIDMA debug file
* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/pm_runtime.h>
#include "hidma.h"
static void hidma_ll_chstats(struct seq_file *s, void *llhndl, u32 tre_ch)
struct hidma_lldev *lldev = llhndl;
struct hidma_tre *tre;
u32 length;
dma_addr_t src_start;
dma_addr_t dest_start;
u32 *tre_local;
if (tre_ch >= lldev->nr_tres) {
dev_err(lldev->dev, "invalid TRE number in chstats:%d", tre_ch);
tre = &lldev->trepool[tre_ch];
seq_printf(s, "------Channel %d -----\n", tre_ch);
seq_printf(s, "allocated=%d\n", atomic_read(&tre->allocated));
seq_printf(s, "queued = 0x%x\n", tre->queued);
seq_printf(s, "err_info = 0x%x\n", tre->err_info);
seq_printf(s, "err_code = 0x%x\n", tre->err_code);
seq_printf(s, "status = 0x%x\n", tre->status);
seq_printf(s, "idx = 0x%x\n", tre->idx);
seq_printf(s, "dma_sig = 0x%x\n", tre->dma_sig);
seq_printf(s, "dev_name=%s\n", tre->dev_name);
seq_printf(s, "callback=%p\n", tre->callback);
seq_printf(s, "data=%p\n", tre->data);
seq_printf(s, "tre_index = 0x%x\n", tre->tre_index);
tre_local = &tre->tre_local[0];
src_start = tre_local[HIDMA_TRE_SRC_LOW_IDX];
src_start = ((u64) (tre_local[HIDMA_TRE_SRC_HI_IDX]) << 32) + src_start;
dest_start = tre_local[HIDMA_TRE_DEST_LOW_IDX];
dest_start += ((u64) (tre_local[HIDMA_TRE_DEST_HI_IDX]) << 32);
length = tre_local[HIDMA_TRE_LEN_IDX];
seq_printf(s, "src=%pap\n", &src_start);
seq_printf(s, "dest=%pap\n", &dest_start);
seq_printf(s, "length = 0x%x\n", length);
static void hidma_ll_devstats(struct seq_file *s, void *llhndl)
struct hidma_lldev *lldev = llhndl;
seq_puts(s, "------Device -----\n");
seq_printf(s, "lldev init = 0x%x\n", lldev->initialized);
seq_printf(s, "trch_state = 0x%x\n", lldev->trch_state);
seq_printf(s, "evch_state = 0x%x\n", lldev->evch_state);
seq_printf(s, "chidx = 0x%x\n", lldev->chidx);
seq_printf(s, "nr_tres = 0x%x\n", lldev->nr_tres);
seq_printf(s, "trca=%p\n", lldev->trca);
seq_printf(s, "tre_ring=%p\n", lldev->tre_ring);
seq_printf(s, "tre_ring_handle=%pap\n", &lldev->tre_dma);
seq_printf(s, "tre_ring_size = 0x%x\n", lldev->tre_ring_size);
seq_printf(s, "tre_processed_off = 0x%x\n", lldev->tre_processed_off);
seq_printf(s, "pending_tre_count=%d\n",
seq_printf(s, "evca=%p\n", lldev->evca);
seq_printf(s, "evre_ring=%p\n", lldev->evre_ring);
seq_printf(s, "evre_ring_handle=%pap\n", &lldev->evre_dma);
seq_printf(s, "evre_ring_size = 0x%x\n", lldev->evre_ring_size);
seq_printf(s, "evre_processed_off = 0x%x\n", lldev->evre_processed_off);
seq_printf(s, "tre_write_offset = 0x%x\n", lldev->tre_write_offset);
* hidma_chan_stats: display HIDMA channel statistics
* Display the statistics for the current HIDMA virtual channel device.
static int hidma_chan_stats(struct seq_file *s, void *unused)
struct hidma_chan *mchan = s->private;
struct hidma_desc *mdesc;
struct hidma_dev *dmadev = mchan->dmadev;
seq_printf(s, "paused=%u\n", mchan->paused);
seq_printf(s, "dma_sig=%u\n", mchan->dma_sig);
seq_puts(s, "prepared\n");
list_for_each_entry(mdesc, &mchan->prepared, node)
hidma_ll_chstats(s, mchan->dmadev->lldev, mdesc->tre_ch);
seq_puts(s, "active\n");
list_for_each_entry(mdesc, &mchan->active, node)
hidma_ll_chstats(s, mchan->dmadev->lldev, mdesc->tre_ch);
seq_puts(s, "completed\n");
list_for_each_entry(mdesc, &mchan->completed, node)
hidma_ll_chstats(s, mchan->dmadev->lldev, mdesc->tre_ch);
hidma_ll_devstats(s, mchan->dmadev->lldev);
return 0;
* hidma_dma_info: display HIDMA device info
* Display the info for the current HIDMA device.
static int hidma_dma_info(struct seq_file *s, void *unused)
struct hidma_dev *dmadev = s->private;
resource_size_t sz;
seq_printf(s, "nr_descriptors=%d\n", dmadev->nr_descriptors);
seq_printf(s, "dev_trca=%p\n", &dmadev->dev_trca);
seq_printf(s, "dev_trca_phys=%pa\n", &dmadev->trca_resource->start);
sz = resource_size(dmadev->trca_resource);
seq_printf(s, "dev_trca_size=%pa\n", &sz);
seq_printf(s, "dev_evca=%p\n", &dmadev->dev_evca);
seq_printf(s, "dev_evca_phys=%pa\n", &dmadev->evca_resource->start);
sz = resource_size(dmadev->evca_resource);
seq_printf(s, "dev_evca_size=%pa\n", &sz);
return 0;
static int hidma_chan_stats_open(struct inode *inode, struct file *file)
return single_open(file, hidma_chan_stats, inode->i_private);
static int hidma_dma_info_open(struct inode *inode, struct file *file)
return single_open(file, hidma_dma_info, inode->i_private);
static const struct file_operations hidma_chan_fops = {
.open = hidma_chan_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
static const struct file_operations hidma_dma_fops = {
.open = hidma_dma_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
void hidma_debug_uninit(struct hidma_dev *dmadev)
int hidma_debug_init(struct hidma_dev *dmadev)
int rc = 0;
int chidx = 0;
struct list_head *position = NULL;
dmadev->debugfs = debugfs_create_dir(dev_name(dmadev->, NULL);
if (!dmadev->debugfs) {
rc = -ENODEV;
return rc;
/* walk through the virtual channel list */
list_for_each(position, &dmadev->ddev.channels) {
struct hidma_chan *chan;
chan = list_entry(position, struct hidma_chan,
sprintf(chan->dbg_name, "chan%d", chidx);
chan->debugfs = debugfs_create_dir(chan->dbg_name,
if (!chan->debugfs) {
rc = -ENOMEM;
goto cleanup;
chan->stats = debugfs_create_file("stats", S_IRUGO,
chan->debugfs, chan,
if (!chan->stats) {
rc = -ENOMEM;
goto cleanup;
dmadev->stats = debugfs_create_file("stats", S_IRUGO,
dmadev->debugfs, dmadev,
if (!dmadev->stats) {
rc = -ENOMEM;
goto cleanup;
return 0;
return rc;