/*
* Tegra GK20A GPU Debugger/Profiler Driver
*
* Copyright (c) 2013-2017, 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/fs.h>
#include <linux/file.h>
#include <linux/cdev.h>
#include <linux/uaccess.h>
#include <linux/nvhost.h>
#include <linux/dma-buf.h>
#include <uapi/linux/nvgpu.h>
#include <nvgpu/kmem.h>
#include "gk20a.h"
#include "gr_gk20a.h"
#include "dbg_gpu_gk20a.h"
#include "regops_gk20a.h"
#include <nvgpu/hw/gk20a/hw_therm_gk20a.h>
#include <nvgpu/hw/gk20a/hw_gr_gk20a.h>
#include <nvgpu/hw/gk20a/hw_perf_gk20a.h>
/*
* API to get first channel from the list of all channels
* bound to the debug session
*/
struct channel_gk20a *
nvgpu_dbg_gpu_get_session_channel(struct dbg_session_gk20a *dbg_s)
{
struct dbg_session_channel_data *ch_data;
struct channel_gk20a *ch;
struct gk20a *g = dbg_s->g;
nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
if (list_empty(&dbg_s->ch_list)) {
nvgpu_mutex_release(&dbg_s->ch_list_lock);
return NULL;
}
ch_data = list_first_entry(&dbg_s->ch_list,
struct dbg_session_channel_data,
ch_entry);
ch = g->fifo.channel + ch_data->chid;
nvgpu_mutex_release(&dbg_s->ch_list_lock);
return ch;
}
/* silly allocator - just increment id */
static atomic_t unique_id = ATOMIC_INIT(0);
static int generate_unique_id(void)
{
return atomic_add_return(1, &unique_id);
}
static int alloc_session(struct dbg_session_gk20a **_dbg_s)
{
struct dbg_session_gk20a *dbg_s;
*_dbg_s = NULL;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
dbg_s = kzalloc(sizeof(*dbg_s), GFP_KERNEL);
if (!dbg_s)
return -ENOMEM;
dbg_s->id = generate_unique_id();
*_dbg_s = dbg_s;
return 0;
}
static int alloc_profiler(struct dbg_profiler_object_data **_prof)
{
struct dbg_profiler_object_data *prof;
*_prof = NULL;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
prof = kzalloc(sizeof(*prof), GFP_KERNEL);
if (!prof)
return -ENOMEM;
prof->prof_handle = generate_unique_id();
*_prof = prof;
return 0;
}
static int gk20a_dbg_gpu_do_dev_open(struct inode *inode,
struct file *filp, bool is_profiler)
{
struct dbg_session_gk20a *dbg_session;
struct gk20a *g;
struct device *dev;
int err;
if (!is_profiler)
g = container_of(inode->i_cdev,
struct gk20a, dbg.cdev);
else
g = container_of(inode->i_cdev,
struct gk20a, prof.cdev);
g = gk20a_get(g);
if (!g)
return -ENODEV;
dev = g->dev;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "dbg session: %s", dev_name(dev));
err = alloc_session(&dbg_session);
if (err)
goto free_ref;
filp->private_data = dbg_session;
dbg_session->dev = dev;
dbg_session->g = g;
dbg_session->is_profiler = is_profiler;
dbg_session->is_pg_disabled = false;
dbg_session->is_timeout_disabled = false;
init_waitqueue_head(&dbg_session->dbg_events.wait_queue);
INIT_LIST_HEAD(&dbg_session->ch_list);
err = nvgpu_mutex_init(&dbg_session->ch_list_lock);
if (err)
goto err_free_session;
err = nvgpu_mutex_init(&dbg_session->ioctl_lock);
if (err)
goto err_destroy_lock;
dbg_session->dbg_events.events_enabled = false;
dbg_session->dbg_events.num_pending_events = 0;
return 0;
err_destroy_lock:
nvgpu_mutex_destroy(&dbg_session->ch_list_lock);
err_free_session:
kfree(dbg_session);
free_ref:
gk20a_put(g);
return err;
}
/* used in scenarios where the debugger session can take just the inter-session
* lock for performance, but the profiler session must take the per-gpu lock
* since it might not have an associated channel. */
static void gk20a_dbg_session_nvgpu_mutex_acquire(struct dbg_session_gk20a *dbg_s)
{
struct channel_gk20a *ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (dbg_s->is_profiler || !ch)
nvgpu_mutex_acquire(&dbg_s->g->dbg_sessions_lock);
else
nvgpu_mutex_acquire(&ch->dbg_s_lock);
}
static void gk20a_dbg_session_nvgpu_mutex_release(struct dbg_session_gk20a *dbg_s)
{
struct channel_gk20a *ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (dbg_s->is_profiler || !ch)
nvgpu_mutex_release(&dbg_s->g->dbg_sessions_lock);
else
nvgpu_mutex_release(&ch->dbg_s_lock);
}
static void gk20a_dbg_gpu_events_enable(struct dbg_session_gk20a *dbg_s)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
gk20a_dbg_session_nvgpu_mutex_acquire(dbg_s);
dbg_s->dbg_events.events_enabled = true;
dbg_s->dbg_events.num_pending_events = 0;
gk20a_dbg_session_nvgpu_mutex_release(dbg_s);
}
static void gk20a_dbg_gpu_events_disable(struct dbg_session_gk20a *dbg_s)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
gk20a_dbg_session_nvgpu_mutex_acquire(dbg_s);
dbg_s->dbg_events.events_enabled = false;
dbg_s->dbg_events.num_pending_events = 0;
gk20a_dbg_session_nvgpu_mutex_release(dbg_s);
}
static void gk20a_dbg_gpu_events_clear(struct dbg_session_gk20a *dbg_s)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
gk20a_dbg_session_nvgpu_mutex_acquire(dbg_s);
if (dbg_s->dbg_events.events_enabled &&
dbg_s->dbg_events.num_pending_events > 0)
dbg_s->dbg_events.num_pending_events--;
gk20a_dbg_session_nvgpu_mutex_release(dbg_s);
}
static int gk20a_dbg_gpu_events_ctrl(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_events_ctrl_args *args)
{
int ret = 0;
struct channel_gk20a *ch;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "dbg events ctrl cmd %d", args->cmd);
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch) {
gk20a_err(dev_from_gk20a(dbg_s->g),
"no channel bound to dbg session\n");
return -EINVAL;
}
switch (args->cmd) {
case NVGPU_DBG_GPU_EVENTS_CTRL_CMD_ENABLE:
gk20a_dbg_gpu_events_enable(dbg_s);
break;
case NVGPU_DBG_GPU_EVENTS_CTRL_CMD_DISABLE:
gk20a_dbg_gpu_events_disable(dbg_s);
break;
case NVGPU_DBG_GPU_EVENTS_CTRL_CMD_CLEAR:
gk20a_dbg_gpu_events_clear(dbg_s);
break;
default:
gk20a_err(dev_from_gk20a(dbg_s->g),
"unrecognized dbg gpu events ctrl cmd: 0x%x",
args->cmd);
ret = -EINVAL;
break;
}
return ret;
}
unsigned int gk20a_dbg_gpu_dev_poll(struct file *filep, poll_table *wait)
{
unsigned int mask = 0;
struct dbg_session_gk20a *dbg_s = filep->private_data;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
poll_wait(filep, &dbg_s->dbg_events.wait_queue, wait);
gk20a_dbg_session_nvgpu_mutex_acquire(dbg_s);
if (dbg_s->dbg_events.events_enabled &&
dbg_s->dbg_events.num_pending_events > 0) {
gk20a_dbg(gpu_dbg_gpu_dbg, "found pending event on session id %d",
dbg_s->id);
gk20a_dbg(gpu_dbg_gpu_dbg, "%d events pending",
dbg_s->dbg_events.num_pending_events);
mask = (POLLPRI | POLLIN);
}
gk20a_dbg_session_nvgpu_mutex_release(dbg_s);
return mask;
}
int gk20a_dbg_gpu_dev_open(struct inode *inode, struct file *filp)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
return gk20a_dbg_gpu_do_dev_open(inode, filp, false /* not profiler */);
}
int gk20a_prof_gpu_dev_open(struct inode *inode, struct file *filp)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
return gk20a_dbg_gpu_do_dev_open(inode, filp, true /* is profiler */);
}
void gk20a_dbg_gpu_post_events(struct channel_gk20a *ch)
{
struct dbg_session_data *session_data;
struct dbg_session_gk20a *dbg_s;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
/* guard against the session list being modified */
nvgpu_mutex_acquire(&ch->dbg_s_lock);
list_for_each_entry(session_data, &ch->dbg_s_list, dbg_s_entry) {
dbg_s = session_data->dbg_s;
if (dbg_s->dbg_events.events_enabled) {
gk20a_dbg(gpu_dbg_gpu_dbg, "posting event on session id %d",
dbg_s->id);
gk20a_dbg(gpu_dbg_gpu_dbg, "%d events pending",
dbg_s->dbg_events.num_pending_events);
dbg_s->dbg_events.num_pending_events++;
wake_up_interruptible_all(&dbg_s->dbg_events.wait_queue);
}
}
nvgpu_mutex_release(&ch->dbg_s_lock);
}
bool gk20a_dbg_gpu_broadcast_stop_trigger(struct channel_gk20a *ch)
{
struct dbg_session_data *session_data;
struct dbg_session_gk20a *dbg_s;
bool broadcast = false;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg | gpu_dbg_intr, "");
/* guard against the session list being modified */
nvgpu_mutex_acquire(&ch->dbg_s_lock);
list_for_each_entry(session_data, &ch->dbg_s_list, dbg_s_entry) {
dbg_s = session_data->dbg_s;
if (dbg_s->broadcast_stop_trigger) {
gk20a_dbg(gpu_dbg_gpu_dbg | gpu_dbg_fn | gpu_dbg_intr,
"stop trigger broadcast enabled");
broadcast = true;
break;
}
}
nvgpu_mutex_release(&ch->dbg_s_lock);
return broadcast;
}
int gk20a_dbg_gpu_clear_broadcast_stop_trigger(struct channel_gk20a *ch)
{
struct dbg_session_data *session_data;
struct dbg_session_gk20a *dbg_s;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg | gpu_dbg_intr, "");
/* guard against the session list being modified */
nvgpu_mutex_acquire(&ch->dbg_s_lock);
list_for_each_entry(session_data, &ch->dbg_s_list, dbg_s_entry) {
dbg_s = session_data->dbg_s;
if (dbg_s->broadcast_stop_trigger) {
gk20a_dbg(gpu_dbg_gpu_dbg | gpu_dbg_fn | gpu_dbg_intr,
"stop trigger broadcast disabled");
dbg_s->broadcast_stop_trigger = false;
}
}
nvgpu_mutex_release(&ch->dbg_s_lock);
return 0;
}
static int nvgpu_dbg_timeout_enable(struct dbg_session_gk20a *dbg_s,
int timeout_mode)
{
struct gk20a *g = dbg_s->g;
int err = 0;
gk20a_dbg(gpu_dbg_gpu_dbg, "Timeouts mode requested : %d",
timeout_mode);
switch (timeout_mode) {
case NVGPU_DBG_GPU_IOCTL_TIMEOUT_ENABLE:
if (dbg_s->is_timeout_disabled &&
--g->dbg_timeout_disabled_refcount == 0) {
g->timeouts_enabled = true;
}
dbg_s->is_timeout_disabled = false;
break;
case NVGPU_DBG_GPU_IOCTL_TIMEOUT_DISABLE:
if ((dbg_s->is_timeout_disabled == false) &&
(g->dbg_timeout_disabled_refcount++ == 0)) {
g->timeouts_enabled = false;
}
dbg_s->is_timeout_disabled = true;
break;
default:
gk20a_err(dev_from_gk20a(g),
"unrecognized dbg gpu timeout mode : 0x%x",
timeout_mode);
err = -EINVAL;
break;
}
gk20a_dbg(gpu_dbg_gpu_dbg, "Timeouts enabled : %s",
g->timeouts_enabled ? "Yes" : "No");
return err;
}
int dbg_unbind_single_channel_gk20a(struct dbg_session_gk20a *dbg_s,
struct dbg_session_channel_data *ch_data)
{
struct gk20a *g = dbg_s->g;
int chid;
struct dbg_session_data *session_data;
struct dbg_profiler_object_data *prof_obj, *tmp_obj;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
chid = ch_data->chid;
/* If there's a profiler ctx reservation record associated with this
* session/channel pair, release it.
*/
list_for_each_entry_safe(prof_obj, tmp_obj, &g->profiler_objects,
prof_obj_entry) {
if ((prof_obj->session_id == dbg_s->id) &&
(prof_obj->ch->hw_chid == chid)) {
if (prof_obj->has_reservation) {
g->ops.dbg_session_ops.
release_profiler_reservation(dbg_s, prof_obj);
}
list_del(&prof_obj->prof_obj_entry);
kfree(prof_obj);
}
}
list_del_init(&ch_data->ch_entry);
session_data = ch_data->session_data;
list_del_init(&session_data->dbg_s_entry);
kfree(session_data);
fput(ch_data->ch_f);
kfree(ch_data);
return 0;
}
static int dbg_unbind_all_channels_gk20a(struct dbg_session_gk20a *dbg_s)
{
struct dbg_session_channel_data *ch_data, *tmp;
struct gk20a *g = dbg_s->g;
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
list_for_each_entry_safe(ch_data, tmp, &dbg_s->ch_list, ch_entry)
dbg_unbind_single_channel_gk20a(dbg_s, ch_data);
nvgpu_mutex_release(&dbg_s->ch_list_lock);
nvgpu_mutex_release(&g->dbg_sessions_lock);
return 0;
}
static int dbg_unbind_channel_gk20a(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_unbind_channel_args *args)
{
struct dbg_session_channel_data *ch_data;
struct gk20a *g = dbg_s->g;
bool channel_found = false;
struct channel_gk20a *ch;
int err;
gk20a_dbg(gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s fd=%d",
dev_name(dbg_s->dev), args->channel_fd);
ch = gk20a_get_channel_from_file(args->channel_fd);
if (!ch) {
gk20a_dbg_fn("no channel found for fd");
return -EINVAL;
}
nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
list_for_each_entry(ch_data, &dbg_s->ch_list, ch_entry) {
if (ch->hw_chid == ch_data->chid) {
channel_found = true;
break;
}
}
nvgpu_mutex_release(&dbg_s->ch_list_lock);
if (!channel_found) {
gk20a_dbg_fn("channel not bounded, fd=%d\n", args->channel_fd);
return -EINVAL;
}
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
err = dbg_unbind_single_channel_gk20a(dbg_s, ch_data);
nvgpu_mutex_release(&dbg_s->ch_list_lock);
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
int gk20a_dbg_gpu_dev_release(struct inode *inode, struct file *filp)
{
struct dbg_session_gk20a *dbg_s = filp->private_data;
struct gk20a *g = dbg_s->g;
struct dbg_profiler_object_data *prof_obj, *tmp_obj;
gk20a_dbg(gpu_dbg_gpu_dbg | gpu_dbg_fn, "%s", dev_name(dbg_s->dev));
/* unbind channels */
dbg_unbind_all_channels_gk20a(dbg_s);
/* Powergate/Timeout enable is called here as possibility of dbg_session
* which called powergate/timeout disable ioctl, to be killed without
* calling powergate/timeout enable ioctl
*/
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
g->ops.dbg_session_ops.dbg_set_powergate(dbg_s,
NVGPU_DBG_GPU_POWERGATE_MODE_ENABLE);
nvgpu_dbg_timeout_enable(dbg_s, NVGPU_DBG_GPU_IOCTL_TIMEOUT_ENABLE);
/* Per-context profiler objects were released when we called
* dbg_unbind_all_channels. We could still have global ones.
*/
list_for_each_entry_safe(prof_obj, tmp_obj, &g->profiler_objects,
prof_obj_entry) {
if (prof_obj->session_id == dbg_s->id) {
if (prof_obj->has_reservation)
g->ops.dbg_session_ops.
release_profiler_reservation(dbg_s, prof_obj);
list_del(&prof_obj->prof_obj_entry);
kfree(prof_obj);
}
}
nvgpu_mutex_release(&g->dbg_sessions_lock);
nvgpu_mutex_destroy(&dbg_s->ch_list_lock);
nvgpu_mutex_destroy(&dbg_s->ioctl_lock);
kfree(dbg_s);
gk20a_put(g);
return 0;
}
static int dbg_bind_channel_gk20a(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_bind_channel_args *args)
{
struct file *f;
struct gk20a *g = dbg_s->g;
struct channel_gk20a *ch;
struct dbg_session_channel_data *ch_data;
struct dbg_session_data *session_data;
gk20a_dbg(gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s fd=%d",
dev_name(dbg_s->dev), args->channel_fd);
/* even though get_file_channel is doing this it releases it as well */
/* by holding it here we'll keep it from disappearing while the
* debugger is in session */
f = fget(args->channel_fd);
if (!f)
return -ENODEV;
ch = gk20a_get_channel_from_file(args->channel_fd);
if (!ch) {
gk20a_dbg_fn("no channel found for fd");
fput(f);
return -EINVAL;
}
gk20a_dbg_fn("%s hwchid=%d", dev_name(dbg_s->dev), ch->hw_chid);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
nvgpu_mutex_acquire(&ch->dbg_s_lock);
ch_data = kzalloc(sizeof(*ch_data), GFP_KERNEL);
if (!ch_data) {
fput(f);
return -ENOMEM;
}
ch_data->ch_f = f;
ch_data->channel_fd = args->channel_fd;
ch_data->chid = ch->hw_chid;
INIT_LIST_HEAD(&ch_data->ch_entry);
session_data = kzalloc(sizeof(*session_data), GFP_KERNEL);
if (!session_data) {
kfree(ch_data);
fput(f);
return -ENOMEM;
}
session_data->dbg_s = dbg_s;
INIT_LIST_HEAD(&session_data->dbg_s_entry);
ch_data->session_data = session_data;
list_add(&session_data->dbg_s_entry, &ch->dbg_s_list);
nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
list_add_tail(&ch_data->ch_entry, &dbg_s->ch_list);
nvgpu_mutex_release(&dbg_s->ch_list_lock);
nvgpu_mutex_release(&ch->dbg_s_lock);
nvgpu_mutex_release(&g->dbg_sessions_lock);
return 0;
}
static int nvgpu_ioctl_channel_reg_ops(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_exec_reg_ops_args *args);
static int nvgpu_ioctl_powergate_gk20a(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_powergate_args *args);
static int nvgpu_dbg_gpu_ioctl_smpc_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_smpc_ctxsw_mode_args *args);
static int nvgpu_dbg_gpu_ioctl_hwpm_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_hwpm_ctxsw_mode_args *args);
static int nvgpu_dbg_gpu_ioctl_suspend_resume_sm(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_suspend_resume_all_sms_args *args);
static int nvgpu_ioctl_allocate_profiler_object(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_obj_mgt_args *args);
static int nvgpu_ioctl_free_profiler_object(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_obj_mgt_args *args);
static int nvgpu_ioctl_profiler_reserve(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_reserve_args *args);
static int gk20a_perfbuf_map(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_perfbuf_map_args *args);
static int gk20a_perfbuf_unmap(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_perfbuf_unmap_args *args);
static int gk20a_dbg_pc_sampling(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_pc_sampling_args *args)
{
struct channel_gk20a *ch;
struct gk20a *g = dbg_s->g;
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch)
return -EINVAL;
gk20a_dbg_fn("");
return g->ops.gr.update_pc_sampling ?
g->ops.gr.update_pc_sampling(ch, args->enable) : -EINVAL;
}
static int nvgpu_dbg_gpu_ioctl_timeout(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_timeout_args *args)
{
int err;
struct gk20a *g = get_gk20a(dbg_s->dev);
gk20a_dbg_fn("powergate mode = %d", args->enable);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = nvgpu_dbg_timeout_enable(dbg_s, args->enable);
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static void nvgpu_dbg_gpu_ioctl_get_timeout(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_timeout_args *args)
{
int status;
struct gk20a *g = get_gk20a(dbg_s->dev);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
status = g->timeouts_enabled;
nvgpu_mutex_release(&g->dbg_sessions_lock);
if (status)
args->enable = NVGPU_DBG_GPU_IOCTL_TIMEOUT_ENABLE;
else
args->enable = NVGPU_DBG_GPU_IOCTL_TIMEOUT_DISABLE;
}
static int nvgpu_dbg_gpu_ioctl_set_next_stop_trigger_type(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_set_next_stop_trigger_type_args *args)
{
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
gk20a_dbg_session_nvgpu_mutex_acquire(dbg_s);
dbg_s->broadcast_stop_trigger = (args->broadcast != 0);
gk20a_dbg_session_nvgpu_mutex_release(dbg_s);
return 0;
}
static int nvgpu_dbg_gpu_ioctl_read_single_sm_error_state(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_read_single_sm_error_state_args *args)
{
struct gk20a *g = get_gk20a(dbg_s->dev);
struct gr_gk20a *gr = &g->gr;
struct nvgpu_dbg_gpu_sm_error_state_record *sm_error_state;
u32 sm_id;
int err = 0;
sm_id = args->sm_id;
if (sm_id >= gr->no_of_sm)
return -EINVAL;
sm_error_state = gr->sm_error_states + sm_id;
if (args->sm_error_state_record_size > 0) {
size_t write_size = sizeof(*sm_error_state);
if (write_size > args->sm_error_state_record_size)
write_size = args->sm_error_state_record_size;
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = copy_to_user((void __user *)(uintptr_t)
args->sm_error_state_record_mem,
sm_error_state,
write_size);
nvgpu_mutex_release(&g->dbg_sessions_lock);
if (err) {
gk20a_err(dev_from_gk20a(g), "copy_to_user failed!\n");
return err;
}
args->sm_error_state_record_size = write_size;
}
return 0;
}
static int nvgpu_dbg_gpu_ioctl_clear_single_sm_error_state(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_clear_single_sm_error_state_args *args)
{
struct gk20a *g = get_gk20a(dbg_s->dev);
struct gr_gk20a *gr = &g->gr;
u32 sm_id;
struct channel_gk20a *ch;
int err = 0;
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch)
return -EINVAL;
sm_id = args->sm_id;
if (sm_id >= gr->no_of_sm)
return -EINVAL;
err = gk20a_busy(g);
if (err)
return err;
err = gr_gk20a_elpg_protected_call(g,
g->ops.gr.clear_sm_error_state(g, ch, sm_id));
gk20a_idle(g);
return err;
}
static int nvgpu_dbg_gpu_ioctl_write_single_sm_error_state(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_write_single_sm_error_state_args *args)
{
struct gk20a *g = get_gk20a(dbg_s->dev);
struct gr_gk20a *gr = &g->gr;
u32 sm_id;
struct channel_gk20a *ch;
struct nvgpu_dbg_gpu_sm_error_state_record *sm_error_state;
int err = 0;
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch)
return -EINVAL;
sm_id = args->sm_id;
if (sm_id >= gr->no_of_sm)
return -EINVAL;
sm_error_state = kzalloc(sizeof(*sm_error_state), GFP_KERNEL);
if (!sm_error_state)
return -ENOMEM;
if (args->sm_error_state_record_size > 0) {
size_t read_size = sizeof(*sm_error_state);
if (read_size > args->sm_error_state_record_size)
read_size = args->sm_error_state_record_size;
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = copy_from_user(sm_error_state,
(void __user *)(uintptr_t)
args->sm_error_state_record_mem,
read_size);
nvgpu_mutex_release(&g->dbg_sessions_lock);
if (err) {
err = -ENOMEM;
goto err_free;
}
}
err = gk20a_busy(g);
if (err)
goto err_free;
err = gr_gk20a_elpg_protected_call(g,
g->ops.gr.update_sm_error_state(g, ch,
sm_id, sm_error_state));
gk20a_idle(g);
err_free:
kfree(sm_error_state);
return err;
}
static int
nvgpu_dbg_gpu_ioctl_suspend_resume_contexts(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_suspend_resume_contexts_args *args)
{
struct gk20a *g = dbg_s->g;
int err = 0;
int ctx_resident_ch_fd = -1;
err = gk20a_busy(g);
if (err)
return err;
switch (args->action) {
case NVGPU_DBG_GPU_SUSPEND_ALL_CONTEXTS:
err = g->ops.gr.suspend_contexts(g, dbg_s,
&ctx_resident_ch_fd);
break;
case NVGPU_DBG_GPU_RESUME_ALL_CONTEXTS:
err = g->ops.gr.resume_contexts(g, dbg_s,
&ctx_resident_ch_fd);
break;
}
if (ctx_resident_ch_fd < 0) {
args->is_resident_context = 0;
} else {
args->is_resident_context = 1;
args->resident_context_fd = ctx_resident_ch_fd;
}
gk20a_idle(g);
return err;
}
static int nvgpu_dbg_gpu_ioctl_access_fb_memory(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_access_fb_memory_args *args)
{
struct gk20a *g = dbg_s->g;
struct dma_buf *dmabuf;
void __user *user_buffer = (void __user *)(uintptr_t)args->buffer;
void *buffer;
u64 size, access_size, offset;
u64 access_limit_size = SZ_4K;
int err = 0;
if ((args->offset & 3) || (!args->size) || (args->size & 3))
return -EINVAL;
dmabuf = dma_buf_get(args->dmabuf_fd);
if (IS_ERR(dmabuf))
return -EINVAL;
if ((args->offset > dmabuf->size) ||
(args->size > dmabuf->size) ||
(args->offset + args->size > dmabuf->size)) {
err = -EINVAL;
goto fail_dmabuf_put;
}
buffer = nvgpu_big_zalloc(g, access_limit_size);
if (!buffer) {
err = -ENOMEM;
goto fail_dmabuf_put;
}
size = args->size;
offset = 0;
err = gk20a_busy(g);
if (err)
goto fail_free_buffer;
while (size) {
/* Max access size of access_limit_size in one loop */
access_size = min(access_limit_size, size);
if (args->cmd ==
NVGPU_DBG_GPU_IOCTL_ACCESS_FB_MEMORY_CMD_WRITE) {
err = copy_from_user(buffer, user_buffer + offset,
access_size);
if (err)
goto fail_idle;
}
err = gk20a_vidbuf_access_memory(g, dmabuf, buffer,
args->offset + offset, access_size,
args->cmd);
if (err)
goto fail_idle;
if (args->cmd ==
NVGPU_DBG_GPU_IOCTL_ACCESS_FB_MEMORY_CMD_READ) {
err = copy_to_user(user_buffer + offset,
buffer, access_size);
if (err)
goto fail_idle;
}
size -= access_size;
offset += access_size;
}
fail_idle:
gk20a_idle(g);
fail_free_buffer:
nvgpu_big_free(g, buffer);
fail_dmabuf_put:
dma_buf_put(dmabuf);
return err;
}
long gk20a_dbg_gpu_dev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct dbg_session_gk20a *dbg_s = filp->private_data;
struct gk20a *g = get_gk20a(dbg_s->dev);
u8 buf[NVGPU_DBG_GPU_IOCTL_MAX_ARG_SIZE];
int err = 0;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "");
if ((_IOC_TYPE(cmd) != NVGPU_DBG_GPU_IOCTL_MAGIC) ||
(_IOC_NR(cmd) == 0) ||
(_IOC_NR(cmd) > NVGPU_DBG_GPU_IOCTL_LAST) ||
(_IOC_SIZE(cmd) > NVGPU_DBG_GPU_IOCTL_MAX_ARG_SIZE))
return -EINVAL;
memset(buf, 0, sizeof(buf));
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (copy_from_user(buf, (void __user *)arg, _IOC_SIZE(cmd)))
return -EFAULT;
}
if (!g->gr.sw_ready) {
err = gk20a_busy(g);
if (err)
return err;
gk20a_idle(g);
}
/* protect from threaded user space calls */
nvgpu_mutex_acquire(&dbg_s->ioctl_lock);
switch (cmd) {
case NVGPU_DBG_GPU_IOCTL_BIND_CHANNEL:
err = dbg_bind_channel_gk20a(dbg_s,
(struct nvgpu_dbg_gpu_bind_channel_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_REG_OPS:
err = nvgpu_ioctl_channel_reg_ops(dbg_s,
(struct nvgpu_dbg_gpu_exec_reg_ops_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_POWERGATE:
err = nvgpu_ioctl_powergate_gk20a(dbg_s,
(struct nvgpu_dbg_gpu_powergate_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_EVENTS_CTRL:
err = gk20a_dbg_gpu_events_ctrl(dbg_s,
(struct nvgpu_dbg_gpu_events_ctrl_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_SMPC_CTXSW_MODE:
err = nvgpu_dbg_gpu_ioctl_smpc_ctxsw_mode(dbg_s,
(struct nvgpu_dbg_gpu_smpc_ctxsw_mode_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_HWPM_CTXSW_MODE:
err = nvgpu_dbg_gpu_ioctl_hwpm_ctxsw_mode(dbg_s,
(struct nvgpu_dbg_gpu_hwpm_ctxsw_mode_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_ALL_SMS:
err = nvgpu_dbg_gpu_ioctl_suspend_resume_sm(dbg_s,
(struct nvgpu_dbg_gpu_suspend_resume_all_sms_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PERFBUF_MAP:
err = gk20a_perfbuf_map(dbg_s,
(struct nvgpu_dbg_gpu_perfbuf_map_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PERFBUF_UNMAP:
err = gk20a_perfbuf_unmap(dbg_s,
(struct nvgpu_dbg_gpu_perfbuf_unmap_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PC_SAMPLING:
err = gk20a_dbg_pc_sampling(dbg_s,
(struct nvgpu_dbg_gpu_pc_sampling_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_SET_NEXT_STOP_TRIGGER_TYPE:
err = nvgpu_dbg_gpu_ioctl_set_next_stop_trigger_type(dbg_s,
(struct nvgpu_dbg_gpu_set_next_stop_trigger_type_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_TIMEOUT:
err = nvgpu_dbg_gpu_ioctl_timeout(dbg_s,
(struct nvgpu_dbg_gpu_timeout_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_GET_TIMEOUT:
nvgpu_dbg_gpu_ioctl_get_timeout(dbg_s,
(struct nvgpu_dbg_gpu_timeout_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_READ_SINGLE_SM_ERROR_STATE:
err = nvgpu_dbg_gpu_ioctl_read_single_sm_error_state(dbg_s,
(struct nvgpu_dbg_gpu_read_single_sm_error_state_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_CLEAR_SINGLE_SM_ERROR_STATE:
err = nvgpu_dbg_gpu_ioctl_clear_single_sm_error_state(dbg_s,
(struct nvgpu_dbg_gpu_clear_single_sm_error_state_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_WRITE_SINGLE_SM_ERROR_STATE:
err = nvgpu_dbg_gpu_ioctl_write_single_sm_error_state(dbg_s,
(struct nvgpu_dbg_gpu_write_single_sm_error_state_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_UNBIND_CHANNEL:
err = dbg_unbind_channel_gk20a(dbg_s,
(struct nvgpu_dbg_gpu_unbind_channel_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS:
err = nvgpu_dbg_gpu_ioctl_suspend_resume_contexts(dbg_s,
(struct nvgpu_dbg_gpu_suspend_resume_contexts_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_ACCESS_FB_MEMORY:
err = nvgpu_dbg_gpu_ioctl_access_fb_memory(dbg_s,
(struct nvgpu_dbg_gpu_access_fb_memory_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PROFILER_ALLOCATE:
err = nvgpu_ioctl_allocate_profiler_object(dbg_s,
(struct nvgpu_dbg_gpu_profiler_obj_mgt_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PROFILER_FREE:
err = nvgpu_ioctl_free_profiler_object(dbg_s,
(struct nvgpu_dbg_gpu_profiler_obj_mgt_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_PROFILER_RESERVE:
err = nvgpu_ioctl_profiler_reserve(dbg_s,
(struct nvgpu_dbg_gpu_profiler_reserve_args *)buf);
break;
default:
gk20a_err(dev_from_gk20a(g),
"unrecognized dbg gpu ioctl cmd: 0x%x",
cmd);
err = -ENOTTY;
break;
}
nvgpu_mutex_release(&dbg_s->ioctl_lock);
gk20a_dbg(gpu_dbg_gpu_dbg, "ret=%d", err);
if ((err == 0) && (_IOC_DIR(cmd) & _IOC_READ))
err = copy_to_user((void __user *)arg,
buf, _IOC_SIZE(cmd));
return err;
}
/* In order to perform a context relative op the context has
* to be created already... which would imply that the
* context switch mechanism has already been put in place.
* So by the time we perform such an opertation it should always
* be possible to query for the appropriate context offsets, etc.
*
* But note: while the dbg_gpu bind requires the a channel fd,
* it doesn't require an allocated gr/compute obj at that point...
*/
static bool gr_context_info_available(struct dbg_session_gk20a *dbg_s,
struct gr_gk20a *gr)
{
int err;
nvgpu_mutex_acquire(&gr->ctx_mutex);
err = !gr->ctx_vars.golden_image_initialized;
nvgpu_mutex_release(&gr->ctx_mutex);
if (err)
return false;
return true;
}
static int nvgpu_ioctl_channel_reg_ops(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_exec_reg_ops_args *args)
{
int err = 0, powergate_err = 0;
bool is_pg_disabled = false;
struct device *dev = dbg_s->dev;
struct gk20a *g = get_gk20a(dbg_s->dev);
struct channel_gk20a *ch;
gk20a_dbg_fn("%d ops, max fragment %d", args->num_ops, g->dbg_regops_tmp_buf_ops);
if (args->num_ops > g->gpu_characteristics.reg_ops_limit) {
gk20a_err(dev, "regops limit exceeded");
return -EINVAL;
}
if (args->num_ops == 0) {
/* Nothing to do */
return 0;
}
if (g->dbg_regops_tmp_buf_ops == 0 || !g->dbg_regops_tmp_buf) {
gk20a_err(dev, "reg ops work buffer not allocated");
return -ENODEV;
}
if (!dbg_s->id) {
gk20a_err(dev, "can't call reg_ops on an unbound debugger session");
return -EINVAL;
}
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!dbg_s->is_profiler && !ch) {
gk20a_err(dev, "bind a channel before regops for a debugging session");
return -EINVAL;
}
/* be sure that ctx info is in place */
if (!gk20a_gpu_is_virtual(dbg_s->dev) &&
!gr_context_info_available(dbg_s, &g->gr)) {
gk20a_err(dev, "gr context data not available\n");
return -ENODEV;
}
/* since exec_reg_ops sends methods to the ucode, it must take the
* global gpu lock to protect against mixing methods from debug sessions
* on other channels */
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
if (!dbg_s->is_pg_disabled && !gk20a_gpu_is_virtual(dbg_s->dev)) {
/* In the virtual case, the server will handle
* disabling/enabling powergating when processing reg ops
*/
powergate_err = g->ops.dbg_session_ops.dbg_set_powergate(dbg_s,
NVGPU_DBG_GPU_POWERGATE_MODE_DISABLE);
is_pg_disabled = true;
}
if (!powergate_err) {
u64 ops_offset = 0; /* index offset */
while (ops_offset < args->num_ops && !err) {
const u64 num_ops =
min(args->num_ops - ops_offset,
(u64)(g->dbg_regops_tmp_buf_ops));
const u64 fragment_size =
num_ops * sizeof(g->dbg_regops_tmp_buf[0]);
void __user *const fragment =
(void __user *)(uintptr_t)
(args->ops +
ops_offset * sizeof(g->dbg_regops_tmp_buf[0]));
gk20a_dbg_fn("Regops fragment: start_op=%llu ops=%llu",
ops_offset, num_ops);
gk20a_dbg_fn("Copying regops from userspace");
if (copy_from_user(g->dbg_regops_tmp_buf,
fragment, fragment_size)) {
dev_err(dev, "copy_from_user failed!");
err = -EFAULT;
break;
}
err = g->ops.dbg_session_ops.exec_reg_ops(
dbg_s, g->dbg_regops_tmp_buf, num_ops);
gk20a_dbg_fn("Copying result to userspace");
if (copy_to_user(fragment, g->dbg_regops_tmp_buf,
fragment_size)) {
dev_err(dev, "copy_to_user failed!");
err = -EFAULT;
break;
}
ops_offset += num_ops;
}
/* enable powergate, if previously disabled */
if (is_pg_disabled) {
powergate_err =
g->ops.dbg_session_ops.dbg_set_powergate(dbg_s,
NVGPU_DBG_GPU_POWERGATE_MODE_ENABLE);
}
}
nvgpu_mutex_release(&g->dbg_sessions_lock);
if (!err && powergate_err)
err = powergate_err;
if (err)
gk20a_err(dev, "dbg regops failed");
return err;
}
static int dbg_set_powergate(struct dbg_session_gk20a *dbg_s, u32 powermode)
{
int err = 0;
struct gk20a *g = get_gk20a(dbg_s->dev);
/* This function must be called with g->dbg_sessions_lock held */
gk20a_dbg(gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %d",
dev_name(dbg_s->dev), powermode);
switch (powermode) {
case NVGPU_DBG_GPU_POWERGATE_MODE_DISABLE:
/* save off current powergate, clk state.
* set gpu module's can_powergate = 0.
* set gpu module's clk to max.
* while *a* debug session is active there will be no power or
* clocking state changes allowed from mainline code (but they
* should be saved).
*/
/* Allow powergate disable if the current dbg_session doesn't
* call a powergate disable ioctl and the global
* powergating_disabled_refcount is zero
*/
if ((dbg_s->is_pg_disabled == false) &&
(g->dbg_powergating_disabled_refcount++ == 0)) {
gk20a_dbg(gpu_dbg_gpu_dbg | gpu_dbg_fn, "module busy");
err = gk20a_busy(g);
if (err)
return err;
/*do elpg disable before clock gating */
gk20a_pmu_pg_global_enable(g, false);
if (g->ops.clock_gating.slcg_gr_load_gating_prod)
g->ops.clock_gating.slcg_gr_load_gating_prod(g,
false);
if (g->ops.clock_gating.slcg_perf_load_gating_prod)
g->ops.clock_gating.slcg_perf_load_gating_prod(g,
false);
if (g->ops.clock_gating.slcg_ltc_load_gating_prod)
g->ops.clock_gating.slcg_ltc_load_gating_prod(g,
false);
gr_gk20a_init_cg_mode(g, BLCG_MODE, BLCG_RUN);
g->elcg_enabled = false;
gr_gk20a_init_cg_mode(g, ELCG_MODE, ELCG_RUN);
}
dbg_s->is_pg_disabled = true;
break;
case NVGPU_DBG_GPU_POWERGATE_MODE_ENABLE:
/* restore (can) powergate, clk state */
/* release pending exceptions to fault/be handled as usual */
/*TBD: ordering of these? */
/* Re-enabling powergate as no other sessions want
* powergate disabled and the current dbg-sessions had
* requested the powergate disable through ioctl
*/
if (dbg_s->is_pg_disabled &&
--g->dbg_powergating_disabled_refcount == 0) {
g->elcg_enabled = true;
gr_gk20a_init_cg_mode(g, ELCG_MODE, ELCG_AUTO);
gr_gk20a_init_cg_mode(g, BLCG_MODE, BLCG_AUTO);
if (g->ops.clock_gating.slcg_ltc_load_gating_prod)
g->ops.clock_gating.slcg_ltc_load_gating_prod(g,
g->slcg_enabled);
if (g->ops.clock_gating.slcg_perf_load_gating_prod)
g->ops.clock_gating.slcg_perf_load_gating_prod(g,
g->slcg_enabled);
if (g->ops.clock_gating.slcg_gr_load_gating_prod)
g->ops.clock_gating.slcg_gr_load_gating_prod(g,
g->slcg_enabled);
gk20a_pmu_pg_global_enable(g, true);
gk20a_dbg(gpu_dbg_gpu_dbg | gpu_dbg_fn, "module idle");
gk20a_idle(g);
}
dbg_s->is_pg_disabled = false;
break;
default:
gk20a_err(dev_from_gk20a(g),
"unrecognized dbg gpu powergate mode: 0x%x",
powermode);
err = -ENOTTY;
break;
}
gk20a_dbg(gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %d done",
dev_name(dbg_s->dev), powermode);
return err;
}
static int nvgpu_ioctl_powergate_gk20a(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_powergate_args *args)
{
int err;
struct gk20a *g = get_gk20a(dbg_s->dev);
gk20a_dbg_fn("%s powergate mode = %d",
dev_name(dbg_s->dev), args->mode);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = g->ops.dbg_session_ops.dbg_set_powergate(dbg_s, args->mode);
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static int nvgpu_dbg_gpu_ioctl_smpc_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_smpc_ctxsw_mode_args *args)
{
int err;
struct gk20a *g = get_gk20a(dbg_s->dev);
struct channel_gk20a *ch_gk20a;
gk20a_dbg_fn("%s smpc ctxsw mode = %d",
dev_name(dbg_s->dev), args->mode);
err = gk20a_busy(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "failed to poweron");
return err;
}
/* Take the global lock, since we'll be doing global regops */
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
ch_gk20a = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch_gk20a) {
gk20a_err(dev_from_gk20a(g),
"no bound channel for smpc ctxsw mode update\n");
err = -EINVAL;
goto clean_up;
}
err = g->ops.gr.update_smpc_ctxsw_mode(g, ch_gk20a,
args->mode == NVGPU_DBG_GPU_SMPC_CTXSW_MODE_CTXSW);
if (err) {
gk20a_err(dev_from_gk20a(g),
"error (%d) during smpc ctxsw mode update\n", err);
goto clean_up;
}
err = g->ops.regops.apply_smpc_war(dbg_s);
clean_up:
nvgpu_mutex_release(&g->dbg_sessions_lock);
gk20a_idle(g);
return err;
}
static int nvgpu_dbg_gpu_ioctl_hwpm_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_hwpm_ctxsw_mode_args *args)
{
int err;
struct gk20a *g = get_gk20a(dbg_s->dev);
struct channel_gk20a *ch_gk20a;
gk20a_dbg_fn("%s pm ctxsw mode = %d",
dev_name(dbg_s->dev), args->mode);
/* Must have a valid reservation to enable/disable hwpm cxtsw.
* Just print an error message for now, but eventually this should
* return an error, at the point where all client sw has been
* cleaned up.
*/
if (!dbg_s->has_profiler_reservation) {
gk20a_err(dev_from_gk20a(g),
"session doesn't have a valid reservation");
}
err = gk20a_busy(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "failed to poweron");
return err;
}
/* Take the global lock, since we'll be doing global regops */
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
ch_gk20a = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch_gk20a) {
gk20a_err(dev_from_gk20a(g),
"no bound channel for pm ctxsw mode update\n");
err = -EINVAL;
goto clean_up;
}
err = g->ops.gr.update_hwpm_ctxsw_mode(g, ch_gk20a,
args->mode == NVGPU_DBG_GPU_HWPM_CTXSW_MODE_CTXSW);
if (err)
gk20a_err(dev_from_gk20a(g),
"error (%d) during pm ctxsw mode update\n", err);
/* gk20a would require a WAR to set the core PM_ENABLE bit, not
* added here with gk20a being deprecated
*/
clean_up:
nvgpu_mutex_release(&g->dbg_sessions_lock);
gk20a_idle(g);
return err;
}
static int nvgpu_dbg_gpu_ioctl_suspend_resume_sm(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_suspend_resume_all_sms_args *args)
{
struct gk20a *g = get_gk20a(dbg_s->dev);
struct channel_gk20a *ch;
int err = 0, action = args->mode;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "action: %d", args->mode);
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch)
return -EINVAL;
err = gk20a_busy(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "failed to poweron");
return err;
}
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
/* Suspend GPU context switching */
err = gr_gk20a_disable_ctxsw(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "unable to stop gr ctxsw");
/* this should probably be ctx-fatal... */
goto clean_up;
}
switch (action) {
case NVGPU_DBG_GPU_SUSPEND_ALL_SMS:
gr_gk20a_suspend_context(ch);
break;
case NVGPU_DBG_GPU_RESUME_ALL_SMS:
gr_gk20a_resume_context(ch);
break;
}
err = gr_gk20a_enable_ctxsw(g);
if (err)
gk20a_err(dev_from_gk20a(g), "unable to restart ctxsw!\n");
clean_up:
nvgpu_mutex_release(&g->dbg_sessions_lock);
gk20a_idle(g);
return err;
}
static int nvgpu_ioctl_allocate_profiler_object(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_obj_mgt_args *args)
{
int err = 0;
struct gk20a *g = get_gk20a(dbg_s->dev);
struct dbg_profiler_object_data *prof_obj;
gk20a_dbg_fn("%s", dev_name(dbg_s->dev));
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = alloc_profiler(&prof_obj);
if (err)
goto clean_up;
prof_obj->session_id = dbg_s->id;
if (dbg_s->is_profiler)
prof_obj->ch = NULL;
else {
prof_obj->ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (prof_obj->ch == NULL) {
gk20a_err(dev_from_gk20a(g),
"bind a channel for dbg session");
kfree(prof_obj);
err = -EINVAL;
goto clean_up;
}
}
/* Return handle to client */
args->profiler_handle = prof_obj->prof_handle;
INIT_LIST_HEAD(&prof_obj->prof_obj_entry);
list_add(&prof_obj->prof_obj_entry, &g->profiler_objects);
clean_up:
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static int nvgpu_ioctl_free_profiler_object(
struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_obj_mgt_args *args)
{
int err = 0;
struct gk20a *g = get_gk20a(dbg_s->dev);
struct dbg_profiler_object_data *prof_obj, *tmp_obj;
bool obj_found = false;
gk20a_dbg_fn("%s session_id = %d profiler_handle = %x",
dev_name(dbg_s->dev), dbg_s->id, args->profiler_handle);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
/* Remove profiler object from the list, if a match is found */
list_for_each_entry_safe(prof_obj, tmp_obj, &g->profiler_objects,
prof_obj_entry) {
if (prof_obj->prof_handle == args->profiler_handle) {
if (prof_obj->session_id != dbg_s->id) {
gk20a_err(dev_from_gk20a(g),
"invalid handle %x",
args->profiler_handle);
err = -EINVAL;
break;
}
if (prof_obj->has_reservation)
g->ops.dbg_session_ops.
release_profiler_reservation(dbg_s, prof_obj);
list_del(&prof_obj->prof_obj_entry);
kfree(prof_obj);
obj_found = true;
break;
}
}
if (!obj_found) {
gk20a_err(dev_from_gk20a(g), "profiler %x not found",
args->profiler_handle);
err = -EINVAL;
}
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static struct dbg_profiler_object_data *find_matching_prof_obj(
struct dbg_session_gk20a *dbg_s,
u32 profiler_handle)
{
struct gk20a *g = dbg_s->g;
struct dbg_profiler_object_data *prof_obj;
list_for_each_entry(prof_obj, &g->profiler_objects, prof_obj_entry) {
if (prof_obj->prof_handle == profiler_handle) {
if (prof_obj->session_id != dbg_s->id) {
gk20a_err(dev_from_gk20a(g),
"invalid handle %x",
profiler_handle);
return NULL;
}
return prof_obj;
}
}
return NULL;
}
static bool nvgpu_check_and_set_global_reservation(
struct dbg_session_gk20a *dbg_s,
struct dbg_profiler_object_data *prof_obj)
{
struct gk20a *g = dbg_s->g;
if (g->profiler_reservation_count == 0) {
g->global_profiler_reservation_held = true;
g->profiler_reservation_count = 1;
dbg_s->has_profiler_reservation = true;
prof_obj->has_reservation = true;
return true;
}
return false;
}
static bool nvgpu_check_and_set_context_reservation(
struct dbg_session_gk20a *dbg_s,
struct dbg_profiler_object_data *prof_obj)
{
struct gk20a *g = dbg_s->g;
/* Assumes that we've already checked that no global reservation
* is in effect.
*/
g->profiler_reservation_count++;
dbg_s->has_profiler_reservation = true;
prof_obj->has_reservation = true;
return true;
}
static void nvgpu_release_profiler_reservation(struct dbg_session_gk20a *dbg_s,
struct dbg_profiler_object_data *prof_obj)
{
struct gk20a *g = dbg_s->g;
g->profiler_reservation_count--;
if (g->profiler_reservation_count < 0)
gk20a_err(dev_from_gk20a(g), "Negative reservation count!");
dbg_s->has_profiler_reservation = false;
prof_obj->has_reservation = false;
if (prof_obj->ch == NULL)
g->global_profiler_reservation_held = false;
}
static int nvgpu_profiler_reserve_acquire(struct dbg_session_gk20a *dbg_s,
u32 profiler_handle)
{
struct gk20a *g = dbg_s->g;
struct dbg_profiler_object_data *prof_obj, *my_prof_obj;
int err = 0;
gk20a_dbg_fn("%s profiler_handle = %x", dev_name(dbg_s->dev), profiler_handle);
if (g->profiler_reservation_count < 0) {
gk20a_err(dev_from_gk20a(g), "Negative reservation count!");
return -EINVAL;
}
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
/* Find matching object. */
my_prof_obj = find_matching_prof_obj(dbg_s, profiler_handle);
if (!my_prof_obj) {
gk20a_err(dev_from_gk20a(g), "object not found");
err = -EINVAL;
goto exit;
}
/* If we already have the reservation, we're done */
if (my_prof_obj->has_reservation) {
err = 0;
goto exit;
}
if (my_prof_obj->ch == NULL) {
/* Global reservations are only allowed if there are no other
* global or per-context reservations currently held
*/
if (!g->ops.dbg_session_ops.check_and_set_global_reservation(
dbg_s, my_prof_obj)) {
gk20a_err(dev_from_gk20a(g),
"global reserve: have existing reservation");
err = -EBUSY;
}
} else if (g->global_profiler_reservation_held) {
/* If there's a global reservation,
* we can't take a per-context one.
*/
gk20a_err(dev_from_gk20a(g),
"per-ctxt reserve: global reservation in effect");
err = -EBUSY;
} else if (gk20a_is_channel_marked_as_tsg(my_prof_obj->ch)) {
/* TSG: check that another channel in the TSG
* doesn't already have the reservation
*/
int my_tsgid = my_prof_obj->ch->tsgid;
list_for_each_entry(prof_obj, &g->profiler_objects,
prof_obj_entry) {
if (prof_obj->has_reservation &&
(prof_obj->ch->tsgid == my_tsgid)) {
gk20a_err(dev_from_gk20a(g),
"per-ctxt reserve (tsg): already reserved");
err = -EBUSY;
goto exit;
}
}
if (!g->ops.dbg_session_ops.check_and_set_context_reservation(
dbg_s, my_prof_obj)) {
/* Another guest OS has the global reservation */
gk20a_err(dev_from_gk20a(g),
"per-ctxt reserve: global reservation in effect");
err = -EBUSY;
}
} else {
/* channel: check that some other profiler object doesn't
* already have the reservation.
*/
struct channel_gk20a *my_ch = my_prof_obj->ch;
list_for_each_entry(prof_obj, &g->profiler_objects,
prof_obj_entry) {
if (prof_obj->has_reservation &&
(prof_obj->ch == my_ch)) {
gk20a_err(dev_from_gk20a(g),
"per-ctxt reserve (ch): already reserved");
err = -EBUSY;
goto exit;
}
}
if (!g->ops.dbg_session_ops.check_and_set_context_reservation(
dbg_s, my_prof_obj)) {
/* Another guest OS has the global reservation */
gk20a_err(dev_from_gk20a(g),
"per-ctxt reserve: global reservation in effect");
err = -EBUSY;
}
}
exit:
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static int nvgpu_profiler_reserve_release(struct dbg_session_gk20a *dbg_s,
u32 profiler_handle)
{
struct gk20a *g = dbg_s->g;
struct dbg_profiler_object_data *prof_obj;
int err = 0;
gk20a_dbg_fn("%s profiler_handle = %x", dev_name(dbg_s->dev), profiler_handle);
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
/* Find matching object. */
prof_obj = find_matching_prof_obj(dbg_s, profiler_handle);
if (!prof_obj) {
gk20a_err(dev_from_gk20a(g), "object not found");
err = -EINVAL;
goto exit;
}
if (prof_obj->has_reservation)
g->ops.dbg_session_ops.release_profiler_reservation(dbg_s, prof_obj);
else {
gk20a_err(dev_from_gk20a(g), "No reservation found");
err = -EINVAL;
goto exit;
}
exit:
nvgpu_mutex_release(&g->dbg_sessions_lock);
return err;
}
static int nvgpu_ioctl_profiler_reserve(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_profiler_reserve_args *args)
{
if (args->acquire)
return nvgpu_profiler_reserve_acquire(dbg_s, args->profiler_handle);
return nvgpu_profiler_reserve_release(dbg_s, args->profiler_handle);
}
static int gk20a_perfbuf_map(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_perfbuf_map_args *args)
{
struct gk20a *g = dbg_s->g;
int err;
u32 virt_size;
u32 virt_addr_lo;
u32 virt_addr_hi;
u32 inst_pa_page;
if (!g->allow_all)
return -EACCES;
err = gk20a_vm_map_buffer(&g->mm.pmu.vm,
args->dmabuf_fd,
&args->offset,
0,
0,
0,
args->mapping_size,
NULL);
if (err)
return err;
/* perf output buffer may not cross a 4GB boundary - with a separate va
* smaller than that, it won't */
virt_size = u64_lo32(args->mapping_size);
virt_addr_lo = u64_lo32(args->offset);
virt_addr_hi = u64_hi32(args->offset);
/* but check anyway */
if (args->offset + virt_size > SZ_4G) {
err = -EINVAL;
goto fail_unmap;
}
err = gk20a_busy(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "failed to poweron");
goto fail_unmap;
}
/* address and size are aligned to 32 bytes, the lowest bits read back
* as zeros */
gk20a_writel(g, perf_pmasys_outbase_r(), virt_addr_lo);
gk20a_writel(g, perf_pmasys_outbaseupper_r(),
perf_pmasys_outbaseupper_ptr_f(virt_addr_hi));
gk20a_writel(g, perf_pmasys_outsize_r(), virt_size);
/* this field is aligned to 4K */
inst_pa_page = gk20a_mm_inst_block_addr(g, &g->mm.hwpm.inst_block) >> 12;
/* A write to MEM_BLOCK triggers the block bind operation. MEM_BLOCK
* should be written last */
gk20a_writel(g, perf_pmasys_mem_block_r(),
perf_pmasys_mem_block_base_f(inst_pa_page) |
perf_pmasys_mem_block_valid_true_f() |
perf_pmasys_mem_block_target_lfb_f());
gk20a_idle(g);
return 0;
fail_unmap:
gk20a_vm_unmap_buffer(&g->mm.pmu.vm, args->offset, NULL);
return err;
}
static int gk20a_perfbuf_unmap(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_perfbuf_unmap_args *args)
{
struct gk20a *g = dbg_s->g;
int err;
if (!g->allow_all)
return -EACCES;
err = gk20a_busy(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "failed to poweron");
return err;
}
gk20a_writel(g, perf_pmasys_outbase_r(), 0);
gk20a_writel(g, perf_pmasys_outbaseupper_r(),
perf_pmasys_outbaseupper_ptr_f(0));
gk20a_writel(g, perf_pmasys_outsize_r(), 0);
gk20a_writel(g, perf_pmasys_mem_block_r(),
perf_pmasys_mem_block_base_f(0) |
perf_pmasys_mem_block_valid_false_f() |
perf_pmasys_mem_block_target_f(0));
gk20a_idle(g);
gk20a_vm_unmap_buffer(&g->mm.pmu.vm, args->offset, NULL);
return 0;
}
void gk20a_init_dbg_session_ops(struct gpu_ops *gops)
{
gops->dbg_session_ops.exec_reg_ops = exec_regops_gk20a;
gops->dbg_session_ops.dbg_set_powergate = dbg_set_powergate;
gops->dbg_session_ops.check_and_set_global_reservation =
nvgpu_check_and_set_global_reservation;
gops->dbg_session_ops.check_and_set_context_reservation =
nvgpu_check_and_set_context_reservation;
gops->dbg_session_ops.release_profiler_reservation =
nvgpu_release_profiler_reservation;
};