1 files changed, 367 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
new file mode 100644
index 00000000..cf04e116
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
@@ -0,0 +1,367 @@
+/*
+ * Tegra GK20A GPU Debugger/Profiler Driver
+ *
+ * Copyright (c) 2013-2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <uapi/linux/nvgpu.h>
+
+#include <nvgpu/kmem.h>
+#include <nvgpu/log.h>
+#include <nvgpu/vm.h>
+#include <nvgpu/atomic.h>
+#include <nvgpu/mm.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 (nvgpu_list_empty(&dbg_s->ch_list)) {
+                nvgpu_mutex_release(&dbg_s->ch_list_lock);
+                return NULL;
+        }
+
+        ch_data = nvgpu_list_first_entry(&dbg_s->ch_list,
+                                   dbg_session_channel_data,
+                                   ch_entry);
+        ch = g->fifo.channel + ch_data->chid;
+
+        nvgpu_mutex_release(&dbg_s->ch_list_lock);
+
+        return ch;
+}
+
+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);
+
+        nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
+                                dbg_session_data, 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++;
+
+                        nvgpu_cond_broadcast_interruptible(&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);
+
+        nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
+                                dbg_session_data, 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);
+
+        nvgpu_list_for_each_entry(session_data, &ch->dbg_s_list,
+                                dbg_session_data, 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;
+}
+
+int dbg_set_powergate(struct dbg_session_gk20a *dbg_s, bool disable_powergate)
+{
+        int err = 0;
+        struct gk20a *g = dbg_s->g;
+
+         /* This function must be called with g->dbg_sessions_lock held */
+
+        nvgpu_log(g, gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %s",
+                   g->name, disable_powergate ? "disable" : "enable");
+
+        /*
+         * Powergate mode here refers to railgate+powergate+clockgate
+         * so in case slcg/blcg/elcg are disabled and railgating is enabled,
+         * disable railgating and then set is_pg_disabled = true
+         * Similarly re-enable railgating and not other features if they are not
+         * enabled when powermode=MODE_ENABLE
+         */
+        if (disable_powergate) {
+                /* 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)) {
+
+                        nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn,
+                                                        "module busy");
+                        err = gk20a_busy(g);
+                        if (err)
+                                return err;
+
+                        /*do elpg disable before clock gating */
+                        nvgpu_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);
+                        gr_gk20a_init_cg_mode(g, ELCG_MODE, ELCG_RUN);
+                }
+
+                dbg_s->is_pg_disabled = true;
+        } else {
+                /* 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) {
+
+                        if (g->elcg_enabled)
+                                gr_gk20a_init_cg_mode(g, ELCG_MODE, ELCG_AUTO);
+
+                        if (g->blcg_enabled)
+                                gr_gk20a_init_cg_mode(g, BLCG_MODE, BLCG_AUTO);
+
+                        if (g->slcg_enabled) {
+                                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);
+                        }
+                        nvgpu_pmu_pg_global_enable(g, true);
+
+                        nvgpu_log(g, gpu_dbg_gpu_dbg | gpu_dbg_fn,
+                                                "module idle");
+                        gk20a_idle(g);
+                }
+
+                dbg_s->is_pg_disabled = false;
+        }
+
+        nvgpu_log(g, gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s powergate mode = %s done",
+                   g->name, disable_powergate ? "disable" : "enable");
+        return err;
+}
+
+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;
+}
+
+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;
+}
+
+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)
+                nvgpu_err(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;
+}
+
+int gk20a_perfbuf_enable_locked(struct gk20a *g, u64 offset, u32 size)
+{
+        struct mm_gk20a *mm = &g->mm;
+        u32 virt_addr_lo;
+        u32 virt_addr_hi;
+        u32 inst_pa_page;
+        int err;
+
+        err = gk20a_busy(g);
+        if (err) {
+                nvgpu_err(g, "failed to poweron");
+                return err;
+        }
+
+        err = g->ops.mm.alloc_inst_block(g, &mm->perfbuf.inst_block);
+        if (err)
+                return err;
+
+        g->ops.mm.init_inst_block(&mm->perfbuf.inst_block, mm->perfbuf.vm, 0);
+
+        virt_addr_lo = u64_lo32(offset);
+        virt_addr_hi = u64_hi32(offset);
+
+        /* 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(), size);
+
+        /* this field is aligned to 4K */
+        inst_pa_page = nvgpu_inst_block_addr(g, &mm->perfbuf.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;
+}
+
+/* must be called with dbg_sessions_lock held */
+int gk20a_perfbuf_disable_locked(struct gk20a *g)
+{
+        int err = gk20a_busy(g);
+        if (err) {
+                nvgpu_err(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);
+
+        return 0;
+}