soc: qcom: glink_ssr: Export SSR functions and structures for testing (f0d4f54d) · Commits · e / devices / android_kernel_sony_msm8994

drivers/soc/qcom/glink_private.h

+139 −10

Original line number	Diff line number	Diff line
		@@ -350,16 +350,6 @@ int glink_get_channel_id_for_handle(void *handle);
		*/
		char glink_get_channel_name_for_handle(void handle);

		/**
		* glink_ssr_wait_cleanup_done() - Get the value of the
		* notifications_successful flag in glink_ssr.
		* @timeout_multiplier: timeout multiplier for waiting on all processors
		*
		*
		* Return: True if cleanup_done received from all processors, false otherwise
		*/
		bool glink_ssr_wait_cleanup_done(unsigned ssr_timeout_multiplier);

		/**
		* glink_debugfs_init() - initialize glink debugfs directory
		*
		@@ -629,6 +619,135 @@ int glink_get_ch_rintents_queued(struct channel_ctx *ch_ctx);
		*/
		void glink_get_ch_intent_info(struct channel_ctx *ch_ctx,
		struct glink_ch_intent_info *ch_ctx_i);

		/**
		* enum ssr_command - G-Link SSR protocol commands
		*/
		enum ssr_command {
		GLINK_SSR_DO_CLEANUP,
		GLINK_SSR_CLEANUP_DONE,
		};

		/**
		* struct subsys_info - Subsystem info structure
		* ssr_name: name of the subsystem recognized by the SSR framework
		* edge: name of the G-Link edge
		* xprt: name of the G-Link transport
		* handle: glink_ssr channel used for this subsystem
		* link_info: Transport info used in link state callback registration
		* cb_data: Private callback data structure for notification functions
		* subsystem_list_node: used to chain this structure in a list of subsystem
		* info structures
		* notify_list: list of subsys_info_leaf structures, containing the subsystems
		* to notify if this subsystem undergoes SSR
		* notify_list_len: length of notify_list
		*/
		struct subsys_info {
		const char *ssr_name;
		const char *edge;
		const char *xprt;
		void *handle;
		struct glink_link_info *link_info;
		struct ssr_notify_data *cb_data;
		struct list_head subsystem_list_node;
		struct list_head notify_list;
		int notify_list_len;
		bool link_up;
		};

		/**
		* struct subsys_info_leaf - Subsystem info leaf structure (a subsystem on the
		* notify list of a subsys_info structure)
		* ssr_name: Name of the subsystem recognized by the SSR framework
		* edge: Name of the G-Link edge
		* xprt: Name of the G-Link transport
		* restarted: Indicates whether a restart has been triggered for this edge
		* cb_data: Private callback data structure for notification functions
		* notify_list_node: used to chain this structure in the notify list
		*/
		struct subsys_info_leaf {
		const char *ssr_name;
		const char *edge;
		const char *xprt;
		bool restarted;
		struct ssr_notify_data *cb_data;
		struct list_head notify_list_node;
		};

		/**
		* struct do_cleanup_msg - The data structure for an SSR do_cleanup message
		* version: The G-Link SSR protocol version
		* command: The G-Link SSR command - do_cleanup
		* seq_num: Sequence number
		* name_len: Length of the name of the subsystem being restarted
		* name: G-Link edge name of the subsystem being restarted
		*/
		struct do_cleanup_msg {
		uint32_t version;
		uint32_t command;
		uint32_t seq_num;
		uint32_t name_len;
		char name[32];
		};

		/**
		* struct cleanup_done_msg - The data structure for an SSR cleanup_done message
		* version: The G-Link SSR protocol version
		* response: The G-Link SSR response to a do_cleanup command, cleanup_done
		* seq_num: Sequence number
		*/
		struct cleanup_done_msg {
		uint32_t version;
		uint32_t response;
		uint32_t seq_num;
		};

		/**
		* struct ssr_notify_data - Contains private data used for client notifications
		* from G-Link.
		* tx_done: Indicates whether or not the tx_done notification has been
		* received.
		* event: The state notification event received.
		* responded: Indicates whether or not a cleanup_done response was received.
		* version: G-Link SSR protocol version
		* seq_num: G-Link SSR protocol sequence number
		*/
		struct ssr_notify_data {
		bool tx_done;
		unsigned event;
		bool responded;
		uint32_t version;
		uint32_t seq_num;
		};

		/**
		* get_info_for_subsystem() - Retrieve information about a subsystem from the
		* global subsystem_info_list
		* @subsystem: The name of the subsystem recognized by the SSR
		* framework
		*
		* Return: subsys_info structure containing info for the requested subsystem;
		* NULL if no structure can be found for the requested subsystem
		*/
		struct subsys_info get_info_for_subsystem(const char subsystem);

		/**
		* get_info_for_edge() - Retrieve information about a subsystem from the
		* global subsystem_info_list
		* @edge: The name of the edge recognized by G-Link
		*
		* Return: subsys_info structure containing info for the requested subsystem;
		* NULL if no structure can be found for the requested subsystem
		*/
		struct subsys_info get_info_for_edge(const char edge);

		/**
		* glink_ssr_get_seq_num() - Get the current SSR sequence number
		*
		* Return: The current SSR sequence number
		*/
		uint32_t glink_ssr_get_seq_num(void);

		/*
		* glink_ssr() - SSR cleanup function.
		*
		@@ -636,6 +755,16 @@ void glink_get_ch_intent_info(struct channel_ctx *ch_ctx,
		*/
		int glink_ssr(const char *subsystem);

		/**
		* glink_ssr_wait_cleanup_done() - Get the value of the
		* notifications_successful flag in glink_ssr.
		* @timeout_multiplier: timeout multiplier for waiting on all processors
		*
		*
		* Return: True if cleanup_done received from all processors, false otherwise
		*/
		bool glink_ssr_wait_cleanup_done(unsigned ssr_timeout_multiplier);

		struct channel_lcid {
		struct list_head list_node;
		uint32_t lcid;

drivers/soc/qcom/glink_ssr.c

+15 −105

Original line number	Diff line number	Diff line
		@@ -37,14 +37,6 @@ static bool notifications_successful;
		/* Completion for setting notifications_successful */
		struct completion notifications_successful_complete;

		/**
		* enum ssr_command - G-Link SSR protocol commands
		*/
		enum ssr_command {
		GLINK_SSR_DO_CLEANUP,
		GLINK_SSR_CLEANUP_DONE,
		};

		/**
		* struct restart_notifier_block - restart notifier wrapper structure
		* subsystem: the name of the subsystem as recognized by the SSR framework
		@@ -55,98 +47,6 @@ struct restart_notifier_block {
		struct notifier_block nb;
		};

		/**
		* struct subsys_info - Subsystem info structure
		* ssr_name: name of the subsystem recognized by the SSR framework
		* edge: name of the G-Link edge
		* xprt: name of the G-Link transport
		* handle: glink_ssr channel used for this subsystem
		* link_info: Transport info used in link state callback registration
		* cb_data: Private callback data structure for notification functions
		* subsystem_list_node: used to chain this structure in a list of subsystem
		* info structures
		* notify_list: list of subsys_info_leaf structures, containing the subsystems
		* to notify if this subsystem undergoes SSR
		* notify_list_len: length of notify_list
		*/
		struct subsys_info {
		const char *ssr_name;
		const char *edge;
		const char *xprt;
		void *handle;
		struct glink_link_info *link_info;
		struct ssr_notify_data *cb_data;
		struct list_head subsystem_list_node;
		struct list_head notify_list;
		int notify_list_len;
		bool link_up;
		};

		/**
		* struct subsys_info_leaf - Subsystem info leaf structure (a subsystem on the
		* notify list of a subsys_info structure)
		* ssr_name: Name of the subsystem recognized by the SSR framework
		* edge: Name of the G-Link edge
		* xprt: Name of the G-Link transport
		* restarted: Indicates whether a restart has been triggered for this edge
		* cb_data: Private callback data structure for notification functions
		* notify_list_node: used to chain this structure in the notify list
		*/
		struct subsys_info_leaf {
		const char *ssr_name;
		const char *edge;
		const char *xprt;
		bool restarted;
		struct ssr_notify_data *cb_data;
		struct list_head notify_list_node;
		};

		/**
		* struct do_cleanup_msg - The data structure for an SSR do_cleanup message
		* version: The G-Link SSR protocol version
		* command: The G-Link SSR command - do_cleanup
		* seq_num: Sequence number
		* name_len: Length of the name of the subsystem being restarted
		* name: G-Link edge name of the subsystem being restarted
		*/
		struct do_cleanup_msg {
		uint32_t version;
		uint32_t command;
		uint32_t seq_num;
		uint32_t name_len;
		char name[GLINK_NAME_SIZE];
		};

		/**
		* struct cleanup_done_msg - The data structure for an SSR cleanup_done message
		* version: The G-Link SSR protocol version
		* response: The G-Link SSR response to a do_cleanup command, cleanup_done
		* seq_num: Sequence number
		*/
		struct cleanup_done_msg {
		uint32_t version;
		uint32_t response;
		uint32_t seq_num;
		};

		/**
		* struct ssr_notify_data - Contains private data used for client notifications
		* from G-Link.
		* tx_done: Indicates whether or not the tx_done notification has been
		* received.
		* event: The state notification event received.
		* responded: Indicates whether or not a cleanup_done response was received.
		* version: G-Link SSR protocol version
		* seq_num: G-Link SSR protocol sequence number
		*/
		struct ssr_notify_data {
		bool tx_done;
		unsigned event;
		bool responded;
		uint32_t version;
		uint32_t seq_num;
		};

		/**
		* struct configure_and_open_ch_work - Work structure for used for opening
		* glink_ssr channels
		@@ -179,13 +79,10 @@ static int glink_ssr_restart_notifier_cb(struct notifier_block *this,
		unsigned long code,
		void *data);
		static void delete_ss_info_notify_list(struct subsys_info *ss_info);
		static struct subsys_info get_info_for_subsystem(const char subsystem);
		static struct subsys_info get_info_for_edge(const char edge);
		static int notify_for_subsystem(struct subsys_info *ss_info);
		static int configure_and_open_channel(struct subsys_info *ss_info);
		static struct workqueue_struct *glink_ssr_wq;


		static LIST_HEAD(subsystem_list);
		static atomic_t responses_remaining = ATOMIC_INIT(0);
		static wait_queue_head_t waitqueue;
		@@ -667,7 +564,7 @@ static int configure_and_open_channel(struct subsys_info *ss_info)
		* Return: subsys_info structure containing info for the requested subsystem;
		* NULL if no structure can be found for the requested subsystem
		*/
		static struct subsys_info get_info_for_subsystem(const char subsystem)
		struct subsys_info get_info_for_subsystem(const char subsystem)
		{
		struct subsys_info *ss_info_entry;

		@@ -679,6 +576,7 @@ static struct subsys_info get_info_for_subsystem(const char subsystem)

		return NULL;
		}
		EXPORT_SYMBOL(get_info_for_subsystem);

		/**
		* get_info_for_edge() - Retrieve information about a subsystem from the
		@@ -688,7 +586,7 @@ static struct subsys_info get_info_for_subsystem(const char subsystem)
		* Return: subsys_info structure containing info for the requested subsystem;
		* NULL if no structure can be found for the requested subsystem
		*/
		static struct subsys_info get_info_for_edge(const char edge)
		struct subsys_info get_info_for_edge(const char edge)
		{
		struct subsys_info *ss_info_entry;

		@@ -700,6 +598,18 @@ static struct subsys_info get_info_for_edge(const char edge)

		return NULL;
		}
		EXPORT_SYMBOL(get_info_for_edge);

		/**
		* glink_ssr_get_seq_num() - Get the current SSR sequence number
		*
		* Return: The current SSR sequence number
		*/
		uint32_t glink_ssr_get_seq_num(void)
		{
		return sequence_number;
		}
		EXPORT_SYMBOL(glink_ssr_get_seq_num);

		/**
		* delete_ss_info_notify_list() - Delete the notify list for a subsystem