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git://nv-tegra.nvidia.com/linux-nvgpu.git
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Open source GPL/LGPL release
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svcmobrel-release
241
drivers/gpu/nvgpu/common/debugger.c
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241
drivers/gpu/nvgpu/common/debugger.c
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/*
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* Tegra GK20A GPU Debugger/Profiler Driver
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*
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* Copyright (c) 2013-2019, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <nvgpu/kmem.h>
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#include <nvgpu/log.h>
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#include <nvgpu/vm.h>
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#include <nvgpu/atomic.h>
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#include <nvgpu/mm.h>
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#include <nvgpu/bug.h>
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#include <nvgpu/io.h>
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#include <nvgpu/utils.h>
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#include <nvgpu/channel.h>
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#include <nvgpu/gk20a.h>
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#include <nvgpu/nvgpu_init.h>
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#include <nvgpu/debugger.h>
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#include <nvgpu/profiler.h>
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#include <nvgpu/power_features/power_features.h>
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/*
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* API to get first channel from the list of all channels
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* bound to the debug session
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*/
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struct nvgpu_channel *
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nvgpu_dbg_gpu_get_session_channel(struct dbg_session_gk20a *dbg_s)
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{
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struct dbg_session_channel_data *ch_data;
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struct nvgpu_channel *ch;
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struct gk20a *g = dbg_s->g;
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nvgpu_mutex_acquire(&dbg_s->ch_list_lock);
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if (nvgpu_list_empty(&dbg_s->ch_list)) {
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nvgpu_mutex_release(&dbg_s->ch_list_lock);
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return NULL;
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}
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ch_data = nvgpu_list_first_entry(&dbg_s->ch_list,
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dbg_session_channel_data,
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ch_entry);
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ch = g->fifo.channel + ch_data->chid;
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nvgpu_mutex_release(&dbg_s->ch_list_lock);
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return ch;
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}
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void nvgpu_dbg_gpu_post_events(struct nvgpu_channel *ch)
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{
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struct dbg_session_data *session_data;
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struct dbg_session_gk20a *dbg_s;
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struct gk20a *g = ch->g;
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nvgpu_log(g, gpu_dbg_fn | gpu_dbg_gpu_dbg, " ");
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/* guard against the session list being modified */
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nvgpu_mutex_acquire(&ch->dbg_s_lock);
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nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
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dbg_session_data, dbg_s_entry) {
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dbg_s = session_data->dbg_s;
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if (dbg_s->dbg_events.events_enabled) {
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nvgpu_log(g, gpu_dbg_gpu_dbg, "posting event on session id %d",
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dbg_s->id);
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nvgpu_log(g, gpu_dbg_gpu_dbg, "%d events pending",
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dbg_s->dbg_events.num_pending_events);
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dbg_s->dbg_events.num_pending_events++;
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nvgpu_dbg_session_post_event(dbg_s);
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}
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}
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nvgpu_mutex_release(&ch->dbg_s_lock);
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}
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bool nvgpu_dbg_gpu_broadcast_stop_trigger(struct nvgpu_channel *ch)
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{
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struct dbg_session_data *session_data;
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struct dbg_session_gk20a *dbg_s;
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bool broadcast = false;
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struct gk20a *g = ch->g;
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nvgpu_log(g, gpu_dbg_fn | gpu_dbg_gpu_dbg | gpu_dbg_intr, " ");
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/* guard against the session list being modified */
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nvgpu_mutex_acquire(&ch->dbg_s_lock);
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nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
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dbg_session_data, dbg_s_entry) {
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dbg_s = session_data->dbg_s;
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if (dbg_s->broadcast_stop_trigger) {
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn | gpu_dbg_intr,
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"stop trigger broadcast enabled");
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broadcast = true;
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break;
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}
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}
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nvgpu_mutex_release(&ch->dbg_s_lock);
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return broadcast;
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}
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void nvgpu_dbg_gpu_clear_broadcast_stop_trigger(struct nvgpu_channel *ch)
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{
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struct dbg_session_data *session_data;
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struct dbg_session_gk20a *dbg_s;
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struct gk20a *g = ch->g;
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nvgpu_log(g, gpu_dbg_fn | gpu_dbg_gpu_dbg | gpu_dbg_intr, " ");
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/* guard against the session list being modified */
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nvgpu_mutex_acquire(&ch->dbg_s_lock);
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nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
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dbg_session_data, dbg_s_entry) {
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dbg_s = session_data->dbg_s;
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if (dbg_s->broadcast_stop_trigger) {
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn | gpu_dbg_intr,
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"stop trigger broadcast disabled");
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dbg_s->broadcast_stop_trigger = false;
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}
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}
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nvgpu_mutex_release(&ch->dbg_s_lock);
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}
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u32 nvgpu_set_powergate_locked(struct dbg_session_gk20a *dbg_s,
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bool mode)
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{
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u32 err = 0U;
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struct gk20a *g = dbg_s->g;
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if (dbg_s->is_pg_disabled != mode) {
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if (mode == false) {
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g->dbg_powergating_disabled_refcount--;
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}
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/*
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* Allow powergate disable or enable only if
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* the global pg disabled refcount is zero
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*/
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if (g->dbg_powergating_disabled_refcount == 0) {
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err = g->ops.debugger.dbg_set_powergate(dbg_s,
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mode);
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}
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if (mode) {
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g->dbg_powergating_disabled_refcount++;
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}
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dbg_s->is_pg_disabled = mode;
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}
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return err;
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}
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int nvgpu_dbg_set_powergate(struct dbg_session_gk20a *dbg_s, bool disable_powergate)
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{
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int err = 0;
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struct gk20a *g = dbg_s->g;
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/* This function must be called with g->dbg_sessions_lock held */
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nvgpu_log(g, gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %s",
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g->name, disable_powergate ? "disable" : "enable");
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/*
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* Powergate mode here refers to railgate+powergate+clockgate
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* so in case slcg/blcg/elcg are disabled and railgating is enabled,
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* disable railgating and then set is_pg_disabled = true
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* Similarly re-enable railgating and not other features if they are not
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* enabled when powermode=MODE_ENABLE
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*/
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if (disable_powergate) {
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/* save off current powergate, clk state.
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* set gpu module's can_powergate = 0.
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* set gpu module's clk to max.
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* while *a* debug session is active there will be no power or
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* clocking state changes allowed from mainline code (but they
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* should be saved).
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*/
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn,
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"module busy");
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err = gk20a_busy(g);
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if (err != 0) {
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return err;
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}
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#ifdef CONFIG_NVGPU_NON_FUSA
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err = nvgpu_cg_pg_disable(g);
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#endif
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if (err == 0) {
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dbg_s->is_pg_disabled = true;
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn,
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"pg disabled");
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}
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} else {
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/* restore (can) powergate, clk state */
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/* release pending exceptions to fault/be handled as usual */
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/*TBD: ordering of these? */
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#ifdef CONFIG_NVGPU_NON_FUSA
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err = nvgpu_cg_pg_enable(g);
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#endif
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if (err == 0) {
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dbg_s->is_pg_disabled = false;
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn,
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"pg enabled");
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}
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nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn, "module idle");
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gk20a_idle(g);
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}
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nvgpu_log(g, gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %s done",
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g->name, disable_powergate ? "disable" : "enable");
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return err;
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}
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