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/*
* Copyright (c) 2018-2020, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/debugfs.h>
#include <nvgpu/fecs_trace.h>
#include "os_linux.h"
/*
* The sequence iterator functions. We simply use the count of the
* next line as our internal position.
*/
static void *gk20a_fecs_trace_debugfs_ring_seq_start(
struct seq_file *s, loff_t *pos)
{
if (*pos >= GK20A_FECS_TRACE_NUM_RECORDS)
return NULL;
return pos;
}
static void *gk20a_fecs_trace_debugfs_ring_seq_next(
struct seq_file *s, void *v, loff_t *pos)
{
++(*pos);
if (*pos >= GK20A_FECS_TRACE_NUM_RECORDS)
return NULL;
return pos;
}
static void gk20a_fecs_trace_debugfs_ring_seq_stop(
struct seq_file *s, void *v)
{
}
static int gk20a_fecs_trace_debugfs_ring_seq_show(
struct seq_file *s, void *v)
{
loff_t *pos = (loff_t *) v;
struct gk20a *g = *(struct gk20a **)s->private;
struct gk20a_fecs_trace_record *r =
gk20a_fecs_trace_get_record(g, *pos);
int i;
const u32 invalid_tag = gk20a_fecs_trace_record_ts_tag_invalid_ts_v();
u32 tag;
u64 timestamp;
seq_printf(s, "record #%lld (%p)\n", *pos, r);
seq_printf(s, "\tmagic_lo=%08x\n", r->magic_lo);
seq_printf(s, "\tmagic_hi=%08x\n", r->magic_hi);
if (gk20a_fecs_trace_is_valid_record(r)) {
seq_printf(s, "\tcontext_ptr=%08x\n", r->context_ptr);
seq_printf(s, "\tcontext_id=%08x\n", r->context_id);
seq_printf(s, "\tnew_context_ptr=%08x\n", r->new_context_ptr);
seq_printf(s, "\tnew_context_id=%08x\n", r->new_context_id);
for (i = 0; i < gk20a_fecs_trace_num_ts(); i++) {
tag = gk20a_fecs_trace_record_ts_tag_v(r->ts[i]);
if (tag == invalid_tag)
continue;
timestamp = gk20a_fecs_trace_record_ts_timestamp_v(r->ts[i]);
timestamp <<= GK20A_FECS_TRACE_PTIMER_SHIFT;
seq_printf(s, "\ttag=%02x timestamp=%012llx\n", tag, timestamp);
}
}
return 0;
}
/*
* Tie them all together into a set of seq_operations.
*/
static const struct seq_operations gk20a_fecs_trace_debugfs_ring_seq_ops = {
.start = gk20a_fecs_trace_debugfs_ring_seq_start,
.next = gk20a_fecs_trace_debugfs_ring_seq_next,
.stop = gk20a_fecs_trace_debugfs_ring_seq_stop,
.show = gk20a_fecs_trace_debugfs_ring_seq_show
};
/*
* Time to set up the file operations for our /proc file. In this case,
* all we need is an open function which sets up the sequence ops.
*/
static int gk20a_ctxsw_debugfs_ring_open(struct inode *inode,
struct file *file)
{
struct gk20a **p;
p = __seq_open_private(file, &gk20a_fecs_trace_debugfs_ring_seq_ops,
sizeof(struct gk20a *));
if (!p)
return -ENOMEM;
*p = (struct gk20a *)inode->i_private;
return 0;
};
/*
* The file operations structure contains our open function along with
* set of the canned seq_ ops.
*/
static const struct file_operations gk20a_fecs_trace_debugfs_ring_fops = {
.owner = THIS_MODULE,
.open = gk20a_ctxsw_debugfs_ring_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private
};
static int gk20a_fecs_trace_debugfs_read(void *arg, u64 *val)
{
*val = gk20a_fecs_trace_get_read_index((struct gk20a *)arg);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(gk20a_fecs_trace_debugfs_read_fops,
gk20a_fecs_trace_debugfs_read, NULL, "%llu\n");
static int gk20a_fecs_trace_debugfs_write(void *arg, u64 *val)
{
*val = gk20a_fecs_trace_get_write_index((struct gk20a *)arg);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(gk20a_fecs_trace_debugfs_write_fops,
gk20a_fecs_trace_debugfs_write, NULL, "%llu\n");
int nvgpu_fecs_trace_init_debugfs(struct gk20a *g)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
debugfs_create_file("ctxsw_trace_read", 0600, l->debugfs, g,
&gk20a_fecs_trace_debugfs_read_fops);
debugfs_create_file("ctxsw_trace_write", 0600, l->debugfs, g,
&gk20a_fecs_trace_debugfs_write_fops);
debugfs_create_file("ctxsw_trace_ring", 0600, l->debugfs, g,
&gk20a_fecs_trace_debugfs_ring_fops);
return 0;
}
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