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// SPDX-License-Identifier: GPL-2.0
/* CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface
*
* Copyright 2019 Martin Sperl <kernel@martin.sperl.org>
*/
#include <linux/dcache.h>
#include <linux/debugfs.h>
#include "mcp25xxfd_can_debugfs.h"
#include "mcp25xxfd_can_priv.h"
#include "mcp25xxfd_can_tx.h"
static void mcp25xxfd_can_debugfs_regs(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("regs", root);
debugfs_create_x32("con", 0444, dir, &cpriv->regs.con);
debugfs_create_x32("tdc", 0444, dir, &cpriv->regs.tdc);
debugfs_create_x32("tscon", 0444, dir, &cpriv->regs.tscon);
debugfs_create_x32("tefcon", 0444, dir, &cpriv->regs.tscon);
debugfs_create_x32("nbtcfg", 0444, dir, &cpriv->regs.nbtcfg);
debugfs_create_x32("dbtcfg", 0444, dir, &cpriv->regs.dbtcfg);
}
static void mcp25xxfd_can_debugfs_status(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("status", root);
debugfs_create_x32("intf", 0444, dir, &cpriv->status.intf);
debugfs_create_x32("rx_if", 0444, dir, &cpriv->status.rxif);
debugfs_create_x32("tx_if", 0444, dir, &cpriv->status.txif);
debugfs_create_x32("rx_ovif", 0444, dir, &cpriv->status.rxovif);
debugfs_create_x32("tx_atif", 0444, dir, &cpriv->status.txatif);
debugfs_create_x32("tx_req", 0444, dir, &cpriv->status.txreq);
debugfs_create_x32("trec", 0444, dir, &cpriv->status.trec);
}
static void mcp25xxfd_can_debugfs_stats(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("stats", root);
char name[32];
u64 *data;
int i;
# define DEBUGFS_CREATE(name, var) debugfs_create_u64(name, 0444, dir, \
&cpriv->stats.var)
DEBUGFS_CREATE("irq_calls", irq_calls);
DEBUGFS_CREATE("irq_loops", irq_loops);
DEBUGFS_CREATE("irq_thread_rescheduled", irq_thread_rescheduled);
DEBUGFS_CREATE("int_system_error", int_serr_count);
DEBUGFS_CREATE("int_system_error_tx", int_serr_tx_count);
DEBUGFS_CREATE("int_system_error_rx", int_serr_rx_count);
DEBUGFS_CREATE("int_mode_switch", int_mod_count);
DEBUGFS_CREATE("int_rx", int_rx_count);
DEBUGFS_CREATE("int_tx_attempt", int_txat_count);
DEBUGFS_CREATE("int_tef", int_tef_count);
DEBUGFS_CREATE("int_rx_overflow", int_rxov_count);
DEBUGFS_CREATE("int_ecc_error", int_ecc_count);
DEBUGFS_CREATE("int_rx_invalid_message", int_ivm_count);
DEBUGFS_CREATE("int_crcerror", int_cerr_count);
DEBUGFS_CREATE("tef_reads", tef_reads);
DEBUGFS_CREATE("tef_conservative_reads", tef_conservative_reads);
DEBUGFS_CREATE("tef_optimized_reads", tef_optimized_reads);
DEBUGFS_CREATE("tef_read_splits", tef_read_splits);
for (i = 0; i < MCP25XXFD_CAN_TEF_READ_BINS - 1; i++) {
snprintf(name, sizeof(name),
"tef_optimized_reads_%i", i + 1);
data = &cpriv->stats.tef_optimized_read_sizes[i];
debugfs_create_u64(name, 0444, dir, data);
}
snprintf(name, sizeof(name), "tef_optimized_reads_%i+", i + 1);
debugfs_create_u64(name, 0444, dir,
&cpriv->stats.tef_optimized_read_sizes[i]);
DEBUGFS_CREATE("tx_frames_fd", tx_fd_count);
DEBUGFS_CREATE("tx_frames_brs", tx_brs_count);
DEBUGFS_CREATE("rx_reads", rx_reads);
DEBUGFS_CREATE("rx_reads_prefetched_too_few",
rx_reads_prefetched_too_few);
DEBUGFS_CREATE("rx_reads_prefetched_too_few_bytes",
rx_reads_prefetched_too_few_bytes);
DEBUGFS_CREATE("rx_reads_prefetched_too_many",
rx_reads_prefetched_too_many);
DEBUGFS_CREATE("rx_reads_prefetched_too_many_bytes",
rx_reads_prefetched_too_many_bytes);
DEBUGFS_CREATE("rx_single_reads", rx_single_reads);
DEBUGFS_CREATE("rx_bulk_reads", rx_bulk_reads);
for (i = 0; i < MCP25XXFD_CAN_RX_BULK_READ_BINS - 1; i++) {
snprintf(name, sizeof(name), "rx_bulk_reads_%i", i + 1);
data = &cpriv->stats.rx_bulk_read_sizes[i];
debugfs_create_u64(name, 0444, dir, data);
}
snprintf(name, sizeof(name), "rx_bulk_reads_%i+", i + 1);
debugfs_create_u64(name, 0444, dir,
&cpriv->stats.rx_bulk_read_sizes[i]);
if (cpriv->can.dev->mtu == CANFD_MTU)
debugfs_create_u32("rx_reads_prefetch_predicted_len", 0444,
dir, &cpriv->rx_history.predicted_len);
#undef DEBUGFS_CREATE
}
static void mcp25xxfd_can_debugfs_tef(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("tef", root);
debugfs_create_u32("count", 0444, dir, &cpriv->fifos.tef.count);
debugfs_create_u32("size", 0444, dir, &cpriv->fifos.tef.size);
}
static void mcp25xxfd_can_debugfs_fifo_info(struct mcp25xxfd_fifo_info *info,
int index, struct dentry *root)
{
struct dentry *dir;
char name[4];
snprintf(name, sizeof(name), "%02i", index);
dir = debugfs_create_dir(name, root);
debugfs_create_u32("is_rx", 0444, dir, &info->is_rx);
debugfs_create_x32("offset", 0444, dir, &info->offset);
debugfs_create_u32("priority", 0444, dir, &info->priority);
debugfs_create_u64("use_count", 0444, dir, &info->use_count);
}
static void mcp25xxfd_can_debugfs_fifos(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("fifos", root);
int i;
/* now present all fifos - there is no fifo 0 */
for (i = 1; i < 32; i++)
mcp25xxfd_can_debugfs_fifo_info(&cpriv->fifos.info[i], i, dir);
}
static void mcp25xxfd_can_debugfs_rxtx_fifos(struct mcp25xxfd_fifo *d,
struct dentry *root)
{
int i, f;
char name[4];
char link[32];
debugfs_create_u32("count", 0444, root, &d->count);
debugfs_create_u32("size", 0444, root, &d->size);
debugfs_create_u32("start", 0444, root, &d->start);
for (f = d->start, i = 0; i < d->count; f++, i++) {
snprintf(name, sizeof(name), "%02i", i);
snprintf(link, sizeof(link), "../fifos/%02i", f);
debugfs_create_symlink(name, root, link);
}
}
static void mcp25xxfd_can_debugfs_rx_fifos(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("rx_fifos", root);
mcp25xxfd_can_debugfs_rxtx_fifos(&cpriv->fifos.rx, dir);
}
static void mcp25xxfd_can_debugfs_tx_fifos(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct dentry *dir = debugfs_create_dir("tx_fifos", root);
mcp25xxfd_can_debugfs_rxtx_fifos(&cpriv->fifos.rx, dir);
}
static void mcp25xxfd_can_debugfs_tx_queue(struct mcp25xxfd_can_priv *cpriv,
struct dentry *root)
{
struct mcp25xxfd_tx_spi_message_queue *queue = cpriv->fifos.tx_queue;
struct dentry *dir;
if (!queue)
return;
dir = debugfs_create_dir("tx_queue", root);
debugfs_create_u32("state", 0444, dir, &queue->state);
debugfs_create_x32("fifos_idle", 0444, dir, &queue->idle);
debugfs_create_x32("fifos_in_fill_fifo_transfer",
0444, dir, &queue->in_fill_fifo_transfer);
debugfs_create_x32("fifos_in_trigger_fifo_transfer",
0444, dir, &queue->in_trigger_fifo_transfer);
debugfs_create_x32("fifos_in_can_transfer",
0444, dir, &queue->in_can_transfer);
debugfs_create_x32("fifos_transferred",
0444, dir, &queue->transferred);
}
void mcp25xxfd_can_debugfs_remove(struct mcp25xxfd_can_priv *cpriv)
{
debugfs_remove_recursive(cpriv->debugfs_dir);
cpriv->debugfs_dir = NULL;
}
void mcp25xxfd_can_debugfs_setup(struct mcp25xxfd_can_priv *cpriv)
{
struct dentry *root;
/* remove first as we get called during probe and also
* when the can_device is configured/removed
*/
mcp25xxfd_can_debugfs_remove(cpriv);
root = debugfs_create_dir("can", cpriv->priv->debugfs_dir);
cpriv->debugfs_dir = root;
mcp25xxfd_can_debugfs_regs(cpriv, root);
mcp25xxfd_can_debugfs_stats(cpriv, root);
mcp25xxfd_can_debugfs_status(cpriv, root);
mcp25xxfd_can_debugfs_tef(cpriv, root);
mcp25xxfd_can_debugfs_fifos(cpriv, root);
mcp25xxfd_can_debugfs_rx_fifos(cpriv, root);
mcp25xxfd_can_debugfs_tx_fifos(cpriv, root);
mcp25xxfd_can_debugfs_tx_queue(cpriv, root);
}
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