misc: tegra-profiler: add /proc/quadd/status

Add /proc/quadd/status
It allows users to see current status of the Tegra Profiler.

Bug 1374376

Change-Id: I70d548c47bc80f6a12e3637f0af38fe74403de2d
Signed-off-by: Igor Nabirushkin <inabirushkin@nvidia.com>
Reviewed-on: http://git-master/r/309638
(cherry picked from commit 895113159ac3fa814b3261446faa64d480c4f309)
Reviewed-on: http://git-master/r/326021
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Tested-by: Maxim Morin <mmorin@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

9 files changed, 71 insertions, 6 deletions

diff --git a/drivers/misc/tegra-profiler/auth.c b/drivers/misc/tegra-profiler/auth.c
index 654f401b672a..f443e4532bae 100644
--- a/drivers/misc/tegra-profiler/auth.c
+++ b/drivers/misc/tegra-profiler/auth.c
@@ -296,6 +296,11 @@ int quadd_auth_check_debug_flag(const char *package_name)
 	}
 }
 
+int quadd_auth_is_auth_open(void)
+{
+	return atomic_read(&auth_ctx.opened) != 0;
+}
+
 int quadd_auth_init(struct quadd_ctx *quadd_ctx)
 {
 	int err;
diff --git a/drivers/misc/tegra-profiler/auth.h b/drivers/misc/tegra-profiler/auth.h
index aa810f2d5a63..42d6d85e7a6e 100644
--- a/drivers/misc/tegra-profiler/auth.h
+++ b/drivers/misc/tegra-profiler/auth.h
@@ -20,6 +20,7 @@
 struct quadd_ctx;
 
 int quadd_auth_check_debug_flag(const char *package_name);
+int quadd_auth_is_auth_open(void);
 
 int quadd_auth_init(struct quadd_ctx *quadd_ctx);
 void quadd_auth_deinit(void);
diff --git a/drivers/misc/tegra-profiler/comm.c b/drivers/misc/tegra-profiler/comm.c
index 51a4abe9d566..35a4a8e15fae 100644
--- a/drivers/misc/tegra-profiler/comm.c
+++ b/drivers/misc/tegra-profiler/comm.c
@@ -366,9 +366,15 @@ static void comm_reset(void)
 	spin_unlock_irqrestore(&comm_ctx.rb.lock, flags);
 }
 
+static int is_active(void)
+{
+	return atomic_read(&comm_ctx.active) != 0;
+}
+
 static struct quadd_comm_data_interface comm_data = {
 	.put_sample = put_sample,
 	.reset = comm_reset,
+	.is_active = is_active,
 };
 
 static int check_access_permission(void)
diff --git a/drivers/misc/tegra-profiler/comm.h b/drivers/misc/tegra-profiler/comm.h
index 956e44be90c3..a19319d0a71f 100644
--- a/drivers/misc/tegra-profiler/comm.h
+++ b/drivers/misc/tegra-profiler/comm.h
@@ -50,6 +50,7 @@ struct quadd_comm_data_interface {
 	void (*put_sample)(struct quadd_record_data *data, char *extra_data,
 			   unsigned int extra_length);
 	void (*reset)(void);
+	int (*is_active)(void);
 };
 
 struct quadd_comm_ctx {
diff --git a/drivers/misc/tegra-profiler/main.c b/drivers/misc/tegra-profiler/main.c
index f5238bb55eeb..e8856d302d3b 100644
--- a/drivers/misc/tegra-profiler/main.c
+++ b/drivers/misc/tegra-profiler/main.c
@@ -359,9 +359,19 @@ static void get_capabilities(struct quadd_comm_cap *cap)
 	cap->blocked_read = 1;
 }
 
-static void get_state(struct quadd_module_state *state)
+void quadd_get_state(struct quadd_module_state *state)
 {
+	unsigned int status = 0;
+
 	quadd_hrt_get_state(state);
+
+	if (ctx.comm->is_active())
+		status |= QUADD_MOD_STATE_STATUS_IS_ACTIVE;
+
+	if (quadd_auth_is_auth_open())
+		status |= QUADD_MOD_STATE_STATUS_IS_AUTH_OPEN;
+
+	state->reserved[QUADD_MOD_STATE_IDX_STATUS] = status;
 }
 
 static struct quadd_comm_control_interface control = {
@@ -369,7 +379,7 @@ static struct quadd_comm_control_interface control = {
 	.stop			= stop,
 	.set_parameters		= set_parameters,
 	.get_capabilities	= get_capabilities,
-	.get_state		= get_state,
+	.get_state		= quadd_get_state,
 };
 
 static int __init quadd_module_init(void)
diff --git a/drivers/misc/tegra-profiler/quadd.h b/drivers/misc/tegra-profiler/quadd.h
index 75b145ff0e32..41367c3bec96 100644
--- a/drivers/misc/tegra-profiler/quadd.h
+++ b/drivers/misc/tegra-profiler/quadd.h
@@ -25,6 +25,7 @@ struct event_data;
 struct quadd_comm_data_interface;
 struct quadd_hrt_ctx;
 struct quadd_mmap_ctx;
+struct quadd_module_state;
 
 struct quadd_event_source_interface {
 	int (*enable)(void);
@@ -62,4 +63,6 @@ struct quadd_ctx {
 	int collect_kernel_ips;
 };
 
+void quadd_get_state(struct quadd_module_state *state);
+
 #endif	/* __QUADD_H */
diff --git a/drivers/misc/tegra-profiler/quadd_proc.c b/drivers/misc/tegra-profiler/quadd_proc.c
index 02b4cb0e3fce..dbde7041fa04 100644
--- a/drivers/misc/tegra-profiler/quadd_proc.c
+++ b/drivers/misc/tegra-profiler/quadd_proc.c
@@ -74,8 +74,8 @@ static int show_capabilities(struct seq_file *f, void *offset)
 	seq_printf(f, "support polling mode:   %s\n",
 		   YES_NO(cap->blocked_read));
 
-	seq_printf(f, "\n");
-	seq_printf(f, "Supported events:\n");
+	seq_puts(f, "\n");
+	seq_puts(f, "Supported events:\n");
 	seq_printf(f, "cpu_cycles:             %s\n",
 		   YES_NO(event->cpu_cycles));
 	seq_printf(f, "instructions:           %s\n",
@@ -114,6 +114,38 @@ static const struct file_operations capabilities_proc_fops = {
 	.release	= single_release,
 };
 
+static int show_status(struct seq_file *f, void *offset)
+{
+	unsigned int status;
+	unsigned int is_auth_open, active;
+	struct quadd_module_state s;
+
+	quadd_get_state(&s);
+	status = s.reserved[QUADD_MOD_STATE_IDX_STATUS];
+
+	active = status & QUADD_MOD_STATE_STATUS_IS_ACTIVE;
+	is_auth_open = status & QUADD_MOD_STATE_STATUS_IS_AUTH_OPEN;
+
+	seq_printf(f, "status:          %s\n", active ? "active" : "waiting");
+	seq_printf(f, "auth:            %s\n", YES_NO(is_auth_open));
+	seq_printf(f, "all samples:     %llu\n", s.nr_all_samples);
+	seq_printf(f, "skipped samples: %llu\n", s.nr_skipped_samples);
+
+	return 0;
+}
+
+static int show_status_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, show_status, NULL);
+}
+
+static const struct file_operations status_proc_fops = {
+	.open		= show_status_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 void quadd_proc_init(struct quadd_ctx *context)
 {
 	ctx = context;
@@ -121,12 +153,14 @@ void quadd_proc_init(struct quadd_ctx *context)
 	proc_mkdir("quadd", NULL);
 	proc_create("quadd/version", 0, NULL, &version_proc_fops);
 	proc_create("quadd/capabilities", 0, NULL, &capabilities_proc_fops);
+	proc_create("quadd/status", 0, NULL, &status_proc_fops);
 }
 
 void quadd_proc_deinit(void)
 {
 	remove_proc_entry("quadd/version", NULL);
 	remove_proc_entry("quadd/capabilities", NULL);
+	remove_proc_entry("quadd/status", NULL);
 	remove_proc_entry("quadd", NULL);
 }
 
diff --git a/drivers/misc/tegra-profiler/version.h b/drivers/misc/tegra-profiler/version.h
index 6b0f795bb60c..b49405420b92 100644
--- a/drivers/misc/tegra-profiler/version.h
+++ b/drivers/misc/tegra-profiler/version.h
@@ -18,7 +18,7 @@
 #ifndef __QUADD_VERSION_H
 #define __QUADD_VERSION_H
 
-#define QUADD_MODULE_VERSION		"1.34"
+#define QUADD_MODULE_VERSION		"1.35"
 #define QUADD_MODULE_BRANCH		"Dev"
 
 #endif	/* __QUADD_VERSION_H */
diff --git a/include/linux/tegra_profiler.h b/include/linux/tegra_profiler.h
index 823b05e5a6f8..1fda9594ce94 100644
--- a/include/linux/tegra_profiler.h
+++ b/include/linux/tegra_profiler.h
@@ -20,10 +20,11 @@
 #include <linux/ioctl.h>
 
 #define QUADD_SAMPLES_VERSION	17
-#define QUADD_IO_VERSION	6
+#define QUADD_IO_VERSION	7
 
 #define QUADD_IO_VERSION_DYNAMIC_RB		5
 #define QUADD_IO_VERSION_RB_MAX_FILL_COUNT	6
+#define QUADD_IO_VERSION_MOD_STATE_STATUS_FIELD	7
 
 #define QUADD_SAMPLE_VERSION_THUMB_MODE_FLAG	17
 
@@ -289,8 +290,12 @@ struct quadd_comm_cap {
 
 enum {
 	QUADD_MOD_STATE_IDX_RB_MAX_FILL_COUNT = 0,
+	QUADD_MOD_STATE_IDX_STATUS,
 };
 
+#define QUADD_MOD_STATE_STATUS_IS_ACTIVE	(1 << 0)
+#define QUADD_MOD_STATE_STATUS_IS_AUTH_OPEN	(1 << 1)
+
 struct quadd_module_state {
 	u64 nr_all_samples;
 	u64 nr_skipped_samples;