1 files changed, 481 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/debug_pmu.c b/drivers/gpu/nvgpu/os/linux/debug_pmu.c
new file mode 100644
index 00000000..f4ed992d
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/debug_pmu.c
@@ -0,0 +1,481 @@
+/*
+ * Copyright (C) 2017 NVIDIA Corporation.  All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <nvgpu/enabled.h>
+#include "debug_pmu.h"
+#include "os_linux.h"
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+static int lpwr_debug_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+
+        if (g->ops.pmu.pmu_pg_engines_feature_list &&
+                g->ops.pmu.pmu_pg_engines_feature_list(g,
+                PMU_PG_ELPG_ENGINE_ID_GRAPHICS) !=
+                NVGPU_PMU_GR_FEATURE_MASK_POWER_GATING) {
+                seq_printf(s, "PSTATE: %u\n"
+                        "RPPG Enabled: %u\n"
+                        "RPPG ref count: %u\n"
+                        "RPPG state: %u\n"
+                        "MSCG Enabled: %u\n"
+                        "MSCG pstate state: %u\n"
+                        "MSCG transition state: %u\n",
+                        g->ops.clk_arb.get_current_pstate(g),
+                        g->elpg_enabled, g->pmu.elpg_refcnt,
+                        g->pmu.elpg_stat, g->mscg_enabled,
+                        g->pmu.mscg_stat, g->pmu.mscg_transition_state);
+
+        } else
+                seq_printf(s, "ELPG Enabled: %u\n"
+                        "ELPG ref count: %u\n"
+                        "ELPG state: %u\n",
+                        g->elpg_enabled, g->pmu.elpg_refcnt,
+                        g->pmu.elpg_stat);
+
+        return 0;
+
+}
+
+static int lpwr_debug_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, lpwr_debug_show, inode->i_private);
+}
+
+static const struct file_operations lpwr_debug_fops = {
+        .open           = lpwr_debug_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int mscg_stat_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        u64 total_ingating, total_ungating, residency, divisor, dividend;
+        struct pmu_pg_stats_data pg_stat_data = { 0 };
+        int err;
+
+        /* Don't unnecessarily power on the device */
+        if (g->power_on) {
+                err = gk20a_busy(g);
+                if (err)
+                        return err;
+
+                nvgpu_pmu_get_pg_stats(g,
+                        PMU_PG_ELPG_ENGINE_ID_MS, &pg_stat_data);
+                gk20a_idle(g);
+        }
+        total_ingating = g->pg_ingating_time_us +
+                        (u64)pg_stat_data.ingating_time;
+        total_ungating = g->pg_ungating_time_us +
+                        (u64)pg_stat_data.ungating_time;
+
+        divisor = total_ingating + total_ungating;
+
+        /* We compute the residency on a scale of 1000 */
+        dividend = total_ingating * 1000;
+
+        if (divisor)
+                residency = div64_u64(dividend, divisor);
+        else
+                residency = 0;
+
+        seq_printf(s,
+                        "Time in MSCG: %llu us\n"
+                        "Time out of MSCG: %llu us\n"
+                        "MSCG residency ratio: %llu\n"
+                        "MSCG Entry Count: %u\n"
+                        "MSCG Avg Entry latency %u\n"
+                        "MSCG Avg Exit latency %u\n",
+                        total_ingating, total_ungating,
+                        residency, pg_stat_data.gating_cnt,
+                        pg_stat_data.avg_entry_latency_us,
+                        pg_stat_data.avg_exit_latency_us);
+        return 0;
+
+}
+
+static int mscg_stat_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, mscg_stat_show, inode->i_private);
+}
+
+static const struct file_operations mscg_stat_fops = {
+        .open           = mscg_stat_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int mscg_transitions_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        struct pmu_pg_stats_data pg_stat_data = { 0 };
+        u32 total_gating_cnt;
+        int err;
+
+        if (g->power_on) {
+                err = gk20a_busy(g);
+                if (err)
+                        return err;
+
+                nvgpu_pmu_get_pg_stats(g,
+                        PMU_PG_ELPG_ENGINE_ID_MS, &pg_stat_data);
+                gk20a_idle(g);
+        }
+        total_gating_cnt = g->pg_gating_cnt + pg_stat_data.gating_cnt;
+
+        seq_printf(s, "%u\n", total_gating_cnt);
+        return 0;
+
+}
+
+static int mscg_transitions_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, mscg_transitions_show, inode->i_private);
+}
+
+static const struct file_operations mscg_transitions_fops = {
+        .open           = mscg_transitions_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int elpg_stat_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        struct pmu_pg_stats_data pg_stat_data = { 0 };
+        u64 total_ingating, total_ungating, residency, divisor, dividend;
+        int err;
+
+        /* Don't unnecessarily power on the device */
+        if (g->power_on) {
+                err = gk20a_busy(g);
+                if (err)
+                        return err;
+
+                nvgpu_pmu_get_pg_stats(g,
+                        PMU_PG_ELPG_ENGINE_ID_GRAPHICS, &pg_stat_data);
+                gk20a_idle(g);
+        }
+        total_ingating = g->pg_ingating_time_us +
+                        (u64)pg_stat_data.ingating_time;
+        total_ungating = g->pg_ungating_time_us +
+                        (u64)pg_stat_data.ungating_time;
+        divisor = total_ingating + total_ungating;
+
+        /* We compute the residency on a scale of 1000 */
+        dividend = total_ingating * 1000;
+
+        if (divisor)
+                residency = div64_u64(dividend, divisor);
+        else
+                residency = 0;
+
+        seq_printf(s,
+                        "Time in ELPG: %llu us\n"
+                        "Time out of ELPG: %llu us\n"
+                        "ELPG residency ratio: %llu\n"
+                        "ELPG Entry Count: %u\n"
+                        "ELPG Avg Entry latency %u us\n"
+                        "ELPG Avg Exit latency %u us\n",
+                        total_ingating, total_ungating,
+                        residency, pg_stat_data.gating_cnt,
+                        pg_stat_data.avg_entry_latency_us,
+                        pg_stat_data.avg_exit_latency_us);
+        return 0;
+
+}
+
+static int elpg_stat_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, elpg_stat_show, inode->i_private);
+}
+
+static const struct file_operations elpg_stat_fops = {
+        .open           = elpg_stat_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int elpg_transitions_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        struct pmu_pg_stats_data pg_stat_data = { 0 };
+        u32 total_gating_cnt;
+        int err;
+
+        if (g->power_on) {
+                err = gk20a_busy(g);
+                if (err)
+                        return err;
+
+                nvgpu_pmu_get_pg_stats(g,
+                        PMU_PG_ELPG_ENGINE_ID_GRAPHICS, &pg_stat_data);
+                gk20a_idle(g);
+        }
+        total_gating_cnt = g->pg_gating_cnt + pg_stat_data.gating_cnt;
+
+        seq_printf(s, "%u\n", total_gating_cnt);
+        return 0;
+
+}
+
+static int elpg_transitions_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, elpg_transitions_show, inode->i_private);
+}
+
+static const struct file_operations elpg_transitions_fops = {
+        .open           = elpg_transitions_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int falc_trace_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        struct nvgpu_pmu *pmu = &g->pmu;
+        u32 i = 0, j = 0, k, l, m;
+        char part_str[40];
+        void *tracebuffer;
+        char *trace;
+        u32 *trace1;
+
+        /* allocate system memory to copy pmu trace buffer */
+        tracebuffer = nvgpu_kzalloc(g, GK20A_PMU_TRACE_BUFSIZE);
+        if (tracebuffer == NULL)
+                return -ENOMEM;
+
+        /* read pmu traces into system memory buffer */
+        nvgpu_mem_rd_n(g, &pmu->trace_buf,
+                       0, tracebuffer, GK20A_PMU_TRACE_BUFSIZE);
+
+        trace = (char *)tracebuffer;
+        trace1 = (u32 *)tracebuffer;
+
+        for (i = 0; i < GK20A_PMU_TRACE_BUFSIZE; i += 0x40) {
+                for (j = 0; j < 0x40; j++)
+                        if (trace1[(i / 4) + j])
+                                break;
+                if (j == 0x40)
+                        break;
+                seq_printf(s, "Index %x: ", trace1[(i / 4)]);
+                l = 0;
+                m = 0;
+                while (nvgpu_find_hex_in_string((trace+i+20+m), g, &k)) {
+                        if (k >= 40)
+                                break;
+                        strncpy(part_str, (trace+i+20+m), k);
+                        part_str[k] = 0;
+                        seq_printf(s, "%s0x%x", part_str,
+                                        trace1[(i / 4) + 1 + l]);
+                        l++;
+                        m += k + 2;
+                }
+                seq_printf(s, "%s", (trace+i+20+m));
+        }
+
+        nvgpu_kfree(g, tracebuffer);
+        return 0;
+}
+
+static int falc_trace_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, falc_trace_show, inode->i_private);
+}
+
+static const struct file_operations falc_trace_fops = {
+        .open           = falc_trace_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int perfmon_events_enable_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+
+        seq_printf(s, "%u\n", g->pmu.perfmon_sampling_enabled ? 1 : 0);
+        return 0;
+
+}
+
+static int perfmon_events_enable_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, perfmon_events_enable_show, inode->i_private);
+}
+
+static ssize_t perfmon_events_enable_write(struct file *file,
+        const char __user *userbuf, size_t count, loff_t *ppos)
+{
+        struct seq_file *s = file->private_data;
+        struct gk20a *g = s->private;
+        unsigned long val = 0;
+        char buf[40];
+        int buf_size;
+        int err;
+
+        memset(buf, 0, sizeof(buf));
+        buf_size = min(count, (sizeof(buf)-1));
+
+        if (copy_from_user(buf, userbuf, buf_size))
+                return -EFAULT;
+
+        if (kstrtoul(buf, 10, &val) < 0)
+                return -EINVAL;
+
+        /* Don't turn on gk20a unnecessarily */
+        if (g->power_on) {
+                err = gk20a_busy(g);
+                if (err)
+                        return err;
+
+                if (val && !g->pmu.perfmon_sampling_enabled &&
+                                nvgpu_is_enabled(g, NVGPU_PMU_PERFMON)) {
+                        g->pmu.perfmon_sampling_enabled = true;
+                        g->ops.pmu.pmu_perfmon_start_sampling(&(g->pmu));
+                } else if (!val && g->pmu.perfmon_sampling_enabled &&
+                                nvgpu_is_enabled(g, NVGPU_PMU_PERFMON)) {
+                        g->pmu.perfmon_sampling_enabled = false;
+                        g->ops.pmu.pmu_perfmon_stop_sampling(&(g->pmu));
+                }
+                gk20a_idle(g);
+        } else {
+                g->pmu.perfmon_sampling_enabled = val ? true : false;
+        }
+
+        return count;
+}
+
+static const struct file_operations perfmon_events_enable_fops = {
+        .open           = perfmon_events_enable_open,
+        .read           = seq_read,
+        .write          = perfmon_events_enable_write,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int perfmon_events_count_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+
+        seq_printf(s, "%lu\n", g->pmu.perfmon_events_cnt);
+        return 0;
+
+}
+
+static int perfmon_events_count_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, perfmon_events_count_show, inode->i_private);
+}
+
+static const struct file_operations perfmon_events_count_fops = {
+        .open           = perfmon_events_count_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int security_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+
+        seq_printf(s, "%d\n", g->pmu.pmu_mode);
+        return 0;
+
+}
+
+static int security_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, security_show, inode->i_private);
+}
+
+static const struct file_operations security_fops = {
+        .open           = security_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+int gk20a_pmu_debugfs_init(struct gk20a *g)
+{
+        struct dentry *d;
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+        d = debugfs_create_file(
+                "lpwr_debug", S_IRUGO|S_IWUSR, l->debugfs, g,
+                                                &lpwr_debug_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "mscg_residency", S_IRUGO|S_IWUSR, l->debugfs, g,
+                                                &mscg_stat_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "mscg_transitions", S_IRUGO, l->debugfs, g,
+                                                &mscg_transitions_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "elpg_residency", S_IRUGO|S_IWUSR, l->debugfs, g,
+                                                &elpg_stat_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "elpg_transitions", S_IRUGO, l->debugfs, g,
+                                                &elpg_transitions_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "falc_trace", S_IRUGO, l->debugfs, g,
+                                                &falc_trace_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "perfmon_events_enable", S_IRUGO, l->debugfs, g,
+                                                &perfmon_events_enable_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "perfmon_events_count", S_IRUGO, l->debugfs, g,
+                                                &perfmon_events_count_fops);
+        if (!d)
+                goto err_out;
+
+        d = debugfs_create_file(
+                "pmu_security", S_IRUGO, l->debugfs, g,
+                                                &security_fops);
+        if (!d)
+                goto err_out;
+        return 0;
+err_out:
+        pr_err("%s: Failed to make debugfs node\n", __func__);
+        return -ENOMEM;
+}