gpu: nvgpu: Move Linux files away from common

Move all Linux source code files to drivers/gpu/nvgpu/os/linux from
drivers/gpu/nvgpu/common/linux. This changes the meaning of common
to be OS independent.

JIRA NVGPU-598
JIRA NVGPU-601

Change-Id: Ib7f2a43d3688bb0d0b7dcc48469a6783fd988ce9
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1747714
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 452 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/debug.c b/drivers/gpu/nvgpu/os/linux/debug.c
new file mode 100644
index 00000000..8738f3e7
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/debug.c
@@ -0,0 +1,452 @@
+/*
+ * Copyright (C) 2017-2018 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 "debug_cde.h"
+#include "debug_ce.h"
+#include "debug_fifo.h"
+#include "debug_gr.h"
+#include "debug_allocator.h"
+#include "debug_kmem.h"
+#include "debug_pmu.h"
+#include "debug_sched.h"
+#include "debug_hal.h"
+#include "debug_xve.h"
+#include "os_linux.h"
+#include "platform_gk20a.h"
+
+#include "gk20a/gk20a.h"
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+#include <nvgpu/debug.h>
+
+unsigned int gk20a_debug_trace_cmdbuf;
+
+static inline void gk20a_debug_write_printk(void *ctx, const char *str,
+                                            size_t len)
+{
+        pr_info("%s", str);
+}
+
+static inline void gk20a_debug_write_to_seqfile(void *ctx, const char *str,
+                                                size_t len)
+{
+        seq_write((struct seq_file *)ctx, str, len);
+}
+
+void gk20a_debug_output(struct gk20a_debug_output *o,
+                                        const char *fmt, ...)
+{
+        va_list args;
+        int len;
+
+        va_start(args, fmt);
+        len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
+        va_end(args);
+        o->fn(o->ctx, o->buf, len);
+}
+
+static int gk20a_gr_dump_regs(struct gk20a *g,
+                struct gk20a_debug_output *o)
+{
+        if (g->ops.gr.dump_gr_regs)
+                gr_gk20a_elpg_protected_call(g, g->ops.gr.dump_gr_regs(g, o));
+
+        return 0;
+}
+
+int gk20a_gr_debug_dump(struct gk20a *g)
+{
+        struct gk20a_debug_output o = {
+                .fn = gk20a_debug_write_printk
+        };
+
+        gk20a_gr_dump_regs(g, &o);
+
+        return 0;
+}
+
+static int gk20a_gr_debug_show(struct seq_file *s, void *unused)
+{
+        struct device *dev = s->private;
+        struct gk20a *g = gk20a_get_platform(dev)->g;
+        struct gk20a_debug_output o = {
+                .fn = gk20a_debug_write_to_seqfile,
+                .ctx = s,
+        };
+        int err;
+
+        err = gk20a_busy(g);
+        if (err) {
+                nvgpu_err(g, "failed to power on gpu: %d", err);
+                return -EINVAL;
+        }
+
+        gk20a_gr_dump_regs(g, &o);
+
+        gk20a_idle(g);
+
+        return 0;
+}
+
+void gk20a_debug_dump(struct gk20a *g)
+{
+        struct gk20a_platform *platform = gk20a_get_platform(dev_from_gk20a(g));
+        struct gk20a_debug_output o = {
+                .fn = gk20a_debug_write_printk
+        };
+
+        if (platform->dump_platform_dependencies)
+                platform->dump_platform_dependencies(dev_from_gk20a(g));
+
+        /* HAL only initialized after 1st power-on */
+        if (g->ops.debug.show_dump)
+                g->ops.debug.show_dump(g, &o);
+}
+
+static int gk20a_debug_show(struct seq_file *s, void *unused)
+{
+        struct device *dev = s->private;
+        struct gk20a_debug_output o = {
+                .fn = gk20a_debug_write_to_seqfile,
+                .ctx = s,
+        };
+        struct gk20a *g;
+        int err;
+
+        g = gk20a_get_platform(dev)->g;
+
+        err = gk20a_busy(g);
+        if (err) {
+                nvgpu_err(g, "failed to power on gpu: %d", err);
+                return -EFAULT;
+        }
+
+        /* HAL only initialized after 1st power-on */
+        if (g->ops.debug.show_dump)
+                g->ops.debug.show_dump(g, &o);
+
+        gk20a_idle(g);
+        return 0;
+}
+
+static int gk20a_gr_debug_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, gk20a_gr_debug_show, inode->i_private);
+}
+
+static int gk20a_debug_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, gk20a_debug_show, inode->i_private);
+}
+
+static const struct file_operations gk20a_gr_debug_fops = {
+        .open           = gk20a_gr_debug_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static const struct file_operations gk20a_debug_fops = {
+        .open           = gk20a_debug_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+void gk20a_debug_show_dump(struct gk20a *g, struct gk20a_debug_output *o)
+{
+        g->ops.fifo.dump_pbdma_status(g, o);
+        g->ops.fifo.dump_eng_status(g, o);
+
+        gk20a_debug_dump_all_channel_status_ramfc(g, o);
+}
+
+static ssize_t disable_bigpage_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[3];
+        struct gk20a *g = file->private_data;
+
+        if (g->mm.disable_bigpage)
+                buf[0] = 'Y';
+        else
+                buf[0] = 'N';
+        buf[1] = '\n';
+        buf[2] = 0x00;
+        return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t disable_bigpage_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[32];
+        int buf_size;
+        bool bv;
+        struct gk20a *g = file->private_data;
+
+        buf_size = min(count, (sizeof(buf)-1));
+        if (copy_from_user(buf, user_buf, buf_size))
+                return -EFAULT;
+
+        if (strtobool(buf, &bv) == 0) {
+                g->mm.disable_bigpage = bv;
+                gk20a_init_gpu_characteristics(g);
+        }
+
+        return count;
+}
+
+static struct file_operations disable_bigpage_fops = {
+        .open =         simple_open,
+        .read =         disable_bigpage_read,
+        .write =        disable_bigpage_write,
+};
+
+static int railgate_residency_show(struct seq_file *s, void *data)
+{
+        struct gk20a *g = s->private;
+        struct gk20a_platform *platform = dev_get_drvdata(dev_from_gk20a(g));
+        unsigned long time_since_last_state_transition_ms;
+        unsigned long total_rail_gate_time_ms;
+        unsigned long total_rail_ungate_time_ms;
+
+        if (platform->is_railgated(dev_from_gk20a(g))) {
+                time_since_last_state_transition_ms =
+                                jiffies_to_msecs(jiffies -
+                                g->pstats.last_rail_gate_complete);
+                total_rail_ungate_time_ms = g->pstats.total_rail_ungate_time_ms;
+                total_rail_gate_time_ms =
+                                        g->pstats.total_rail_gate_time_ms +
+                                        time_since_last_state_transition_ms;
+        } else {
+                time_since_last_state_transition_ms =
+                                jiffies_to_msecs(jiffies -
+                                g->pstats.last_rail_ungate_complete);
+                total_rail_gate_time_ms = g->pstats.total_rail_gate_time_ms;
+                total_rail_ungate_time_ms =
+                                        g->pstats.total_rail_ungate_time_ms +
+                                        time_since_last_state_transition_ms;
+        }
+
+        seq_printf(s, "Time with Rails Gated: %lu ms\n"
+                        "Time with Rails UnGated: %lu ms\n"
+                        "Total railgating cycles: %lu\n",
+                        total_rail_gate_time_ms,
+                        total_rail_ungate_time_ms,
+                        g->pstats.railgating_cycle_count - 1);
+        return 0;
+
+}
+
+static int railgate_residency_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, railgate_residency_show, inode->i_private);
+}
+
+static const struct file_operations railgate_residency_fops = {
+        .open           = railgate_residency_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int gk20a_railgating_debugfs_init(struct gk20a *g)
+{
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+        struct dentry *d;
+
+        d = debugfs_create_file(
+                "railgate_residency", S_IRUGO|S_IWUSR, l->debugfs, g,
+                                                &railgate_residency_fops);
+        if (!d)
+                return -ENOMEM;
+
+        return 0;
+}
+static ssize_t timeouts_enabled_read(struct file *file,
+                        char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[3];
+        struct gk20a *g = file->private_data;
+
+        if (nvgpu_is_timeouts_enabled(g))
+                buf[0] = 'Y';
+        else
+                buf[0] = 'N';
+        buf[1] = '\n';
+        buf[2] = 0x00;
+        return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t timeouts_enabled_write(struct file *file,
+                        const char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buf[3];
+        int buf_size;
+        bool timeouts_enabled;
+        struct gk20a *g = file->private_data;
+
+        buf_size = min(count, (sizeof(buf)-1));
+        if (copy_from_user(buf, user_buf, buf_size))
+                return -EFAULT;
+
+        if (strtobool(buf, &timeouts_enabled) == 0) {
+                nvgpu_mutex_acquire(&g->dbg_sessions_lock);
+                if (timeouts_enabled == false) {
+                        /* requesting to disable timeouts */
+                        if (g->timeouts_disabled_by_user == false) {
+                                nvgpu_atomic_inc(&g->timeouts_disabled_refcount);
+                                g->timeouts_disabled_by_user = true;
+                        }
+                } else {
+                        /* requesting to enable timeouts */
+                        if (g->timeouts_disabled_by_user == true) {
+                                nvgpu_atomic_dec(&g->timeouts_disabled_refcount);
+                                g->timeouts_disabled_by_user = false;
+                        }
+                }
+                nvgpu_mutex_release(&g->dbg_sessions_lock);
+        }
+
+        return count;
+}
+
+static const struct file_operations timeouts_enabled_fops = {
+        .open =         simple_open,
+        .read =         timeouts_enabled_read,
+        .write =        timeouts_enabled_write,
+};
+
+void gk20a_debug_init(struct gk20a *g, const char *debugfs_symlink)
+{
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+        struct device *dev = dev_from_gk20a(g);
+
+        l->debugfs = debugfs_create_dir(dev_name(dev), NULL);
+        if (!l->debugfs)
+                return;
+
+        if (debugfs_symlink)
+                l->debugfs_alias =
+                        debugfs_create_symlink(debugfs_symlink,
+                                        NULL, dev_name(dev));
+
+        debugfs_create_file("status", S_IRUGO, l->debugfs,
+                dev, &gk20a_debug_fops);
+        debugfs_create_file("gr_status", S_IRUGO, l->debugfs,
+                dev, &gk20a_gr_debug_fops);
+        debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR,
+                l->debugfs, &gk20a_debug_trace_cmdbuf);
+
+        debugfs_create_u32("ch_wdt_timeout_ms", S_IRUGO|S_IWUSR,
+                l->debugfs, &g->ch_wdt_timeout_ms);
+
+        debugfs_create_u32("disable_syncpoints", S_IRUGO,
+                l->debugfs, &g->disable_syncpoints);
+
+        /* New debug logging API. */
+        debugfs_create_u64("log_mask", S_IRUGO|S_IWUSR,
+                l->debugfs, &g->log_mask);
+        debugfs_create_u32("log_trace", S_IRUGO|S_IWUSR,
+                l->debugfs, &g->log_trace);
+
+        l->debugfs_ltc_enabled =
+                        debugfs_create_bool("ltc_enabled", S_IRUGO|S_IWUSR,
+                                 l->debugfs,
+                                 &g->mm.ltc_enabled_target);
+
+        l->debugfs_gr_idle_timeout_default =
+                        debugfs_create_u32("gr_idle_timeout_default_us",
+                                        S_IRUGO|S_IWUSR, l->debugfs,
+                                         &g->gr_idle_timeout_default);
+        l->debugfs_timeouts_enabled =
+                        debugfs_create_file("timeouts_enabled",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        g,
+                                        &timeouts_enabled_fops);
+
+        l->debugfs_disable_bigpage =
+                        debugfs_create_file("disable_bigpage",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        g,
+                                        &disable_bigpage_fops);
+
+        l->debugfs_timeslice_low_priority_us =
+                        debugfs_create_u32("timeslice_low_priority_us",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        &g->timeslice_low_priority_us);
+        l->debugfs_timeslice_medium_priority_us =
+                        debugfs_create_u32("timeslice_medium_priority_us",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        &g->timeslice_medium_priority_us);
+        l->debugfs_timeslice_high_priority_us =
+                        debugfs_create_u32("timeslice_high_priority_us",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        &g->timeslice_high_priority_us);
+        l->debugfs_runlist_interleave =
+                        debugfs_create_bool("runlist_interleave",
+                                        S_IRUGO|S_IWUSR,
+                                        l->debugfs,
+                                        &g->runlist_interleave);
+        l->debugfs_force_preemption_gfxp =
+                debugfs_create_bool("force_preemption_gfxp", S_IRUGO|S_IWUSR,
+                l->debugfs,
+                &g->gr.ctx_vars.force_preemption_gfxp);
+
+        l->debugfs_force_preemption_cilp =
+                debugfs_create_bool("force_preemption_cilp", S_IRUGO|S_IWUSR,
+                l->debugfs,
+                &g->gr.ctx_vars.force_preemption_cilp);
+
+        l->debugfs_dump_ctxsw_stats =
+                debugfs_create_bool("dump_ctxsw_stats_on_channel_close",
+                        S_IRUGO|S_IWUSR, l->debugfs,
+                        &g->gr.ctx_vars.dump_ctxsw_stats_on_channel_close);
+
+        gr_gk20a_debugfs_init(g);
+        gk20a_pmu_debugfs_init(g);
+        gk20a_railgating_debugfs_init(g);
+#ifdef CONFIG_NVGPU_SUPPORT_CDE
+        gk20a_cde_debugfs_init(g);
+#endif
+        gk20a_ce_debugfs_init(g);
+        nvgpu_alloc_debugfs_init(g);
+        nvgpu_hal_debugfs_init(g);
+        gk20a_fifo_debugfs_init(g);
+        gk20a_sched_debugfs_init(g);
+#ifdef CONFIG_NVGPU_TRACK_MEM_USAGE
+        nvgpu_kmem_debugfs_init(g);
+#endif
+        if (g->pci_vendor_id)
+                nvgpu_xve_debugfs_init(g);
+}
+
+void gk20a_debug_deinit(struct gk20a *g)
+{
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+
+        if (!l->debugfs)
+                return;
+
+        gk20a_fifo_debugfs_deinit(g);
+
+        debugfs_remove_recursive(l->debugfs);
+        debugfs_remove(l->debugfs_alias);
+}