Merge 901b28da on remote branch

#

# Copyright (c) 2017, The Linux Foundation. All rights reserved.

#

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License version 2 and

# only version 2 as published by the Free Software Foundation.

#

# 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.

#

# Makefile for generic software bridge module.

#

KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build

obj-m += gsb.o

MY_CFLAGS += -g

ccflags-y += ${MY_CFLAGS}

CC += ${MY_CFLAGS}

gsb-objs := \

	generic_sw_bridge_main.o

all:

	$(MAKE) -C $(KERNEL_SRC) M=$(shell pwd) modules $(KBUILD_OPTIONS)

debug:

	$(MAKE) -C $(KERNEL_SRC) M=$(shell pwd) modules $(KBUILD_OPTIONS) EXTRA_CFLAGS="$(MY_CFLAGS)"

modules_install:

	$(MAKE) -C $(KERNEL_SRC) M=$(shell pwd) modules_install

clean:

	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean

/* Copyright (c) 2017, The Linux Foundation. All rights reserved. */

/*

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * 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.

 */

#ifndef _GENERIC_SW_BRIDGE_H_

#define _GENERIC_SW_BRIDGE_H_

#include <linux/cdev.h>

#include <linux/ipa_odu_bridge.h>

#define MAX_SUPPORTED_IF_CONFIG 1

#define DRV_VERSION "v1.0"

/*

 * MAX buffer length for stats display.

 */

#define MAX_BUFF_LEN 2000

#define INACTIVITY_TIME 200

#define PACKET_DUMP_BUFFER 200

#define PACKET_MP_PRINT_LEN 100

#define READ_STATS_OFFSET 5

#define TAG_LENGTH 48

#define MAX_PACKETS_TO_SEND 50

#define GSB_ACCEPT 1

#define GSB_DROP 2

#define GSB_FORWARD 3

#define GSB_FLOW_CNTRL_QUEUE_MULTIPLIER 4

#define MAC_ADDR_ARRAY(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]

/**

 *  * struct gsb_ipa_stats - GSB - IPA_Bridge/IPA Stats

 *  */

struct gsb_ipa_stats

{

	/* RX Side (UPLINK)*/

	uint64_t total_recv_from_if;

	uint64_t sent_to_ipa;

	uint64_t exception_ipa_not_connected;

	uint64_t exception_non_ip_packet;

	uint64_t exception_fragmented;

	uint64_t drop_flow_control_bottleneck;

	uint64_t ipa_suspend_cnt;

	uint64_t exp_ipa_suspended;

	uint64_t exp_insufficient_hr;

	uint64_t exception_packet_from_ipa;

	uint64_t exp_packet_from_ipa_fail;

	uint64_t drop_send_to_ipa_fail;

	uint64_t exp_if_disconnected;

	uint64_t exp_if_disconnected_fail;

	/* TX Side(DOWNLINK)*/

	uint64_t tx_send_to_if;

	uint64_t tx_send_err;

	uint64_t write_done_from_ipa;

	/* Flow Control Stats */

	uint64_t ipa_low_watermark_cnt;

};

enum if_device_type

{

	WLAN_TYPE = 1,

	ETH_TYPE,

};

struct gsb_if_config

{

	char if_name[IFNAMSIZ];

	u32 bw_reqd_in_mb;

	u16 if_high_watermark;

	u16 if_low_watermark;

	enum if_device_type if_type;

};

/**

 * struct if_ipa_ctx - Interface IPA Context

 *  @stats: GSB - IPA brigde stats

 *  @ipa_rx_completion: Keeps track of pending IPA WRITE DONE Evts

 **/

struct if_ipa_ctx

{

	struct gsb_ipa_stats stats;

	uint64_t ipa_rx_completion;

};

/*

 *  struct gsb_if_info - Each if configured in

 *  GSB will have its own context

 **/

struct gsb_if_info

{

	u32 handle;

	struct dentry *dbg_dir_if;

	struct net_device *pdev;

	struct gsb_if_config  user_config;

	char if_name[IFNAMSIZ];

	bool net_dev_state;

	struct hlist_node cache_ht_node;

	bool is_connected_to_ipa_bridge;

	bool is_wq_scheduled;

	bool is_ipa_bridge_suspended;

	bool is_debugfs_init;

	bool is_ipa_bridge_initialized;

	struct if_ipa_ctx *if_ipa;

	u16 max_q_len_in_gsb;

	u16 low_watermark;

	u16 pendq_cnt;

	u16 freeq_cnt;

	u16 ipa_free_desc_cnt;

	uint64_t wq_schedule_cnt;

	uint64_t idle_cnt;

	spinlock_t flow_ctrl_lock;

	bool flow_ctrl_lock_acquired;

	struct sk_buff_head pend_queue;

	struct list_head pend_queue_head;

	struct list_head free_queue_head;

	struct work_struct ipa_send_task;

	struct work_struct ipa_resume_task;

};

/*

 *  struct gsb_ctx - GSB global Context

 **/

struct gsb_ctx

{

	struct dentry *dbg_dir_root;

	spinlock_t gsb_lock;

	bool gsb_lock_acquired;

	/*

	 * Callback notifiers.

	 */

	struct notifier_block gsb_dev_notifier;

	struct notifier_block gsb_pm_notifier;

	spinlock_t gsb_wake_lock;

	bool gsb_wake_lock_acquired;

	u16 wake_source_ref_count;

	bool do_we_need_wake_source;

	struct wakeup_source gsb_wake_src;

	bool is_wake_src_acquired;

	bool inactivity_timer_scheduled;

	u32 mem_alloc_if_node;

	u32 mem_alloc_read_stats_buffer;

	u32 mem_alloc_if_ipa_context;

	u32 mem_alloc_ioctl_buffer;

	uint64_t mem_alloc_skb_free;

	bool is_ipa_ready;

	u32 gsb_state_mask;

	u16 configured_if_count;

	uint64_t inactivity_timer_cnt;

	uint64_t inactivity_timer_cancelled_cnt;

	struct hlist_head cache_htable_list[MAX_SUPPORTED_IF_CONFIG];

};

u8 NBITS(u32 n)

{

	u8 ret = 0;

	while (n >>= 1) ret++;

	return ret;

}

u32 StringtoAscii(char *str)

{

	int ret = -1;

	int i = 0;

	int len = strlen(str);

	for (i = 0; i < len; i++)

	{

		ret = ret + str[i];

	}

	return ret;

}

// definitions required for IOCTL

static unsigned int dev_num = 1;

static struct cdev gsb_ioctl_cdev;

static struct class *gsb_class;

static dev_t device;

#define GSB_IOC_MAGIC 0xED

/*

 * Ioctls supported by bridge driver

 */

#define GSB_IOC_ADD_IF_CONFIG _IOWR(GSB_IOC_MAGIC, \

	0, \

	struct gsb_if_config *)

#define GSB_IOC_DEL_IF_CONFIG _IOWR(GSB_IOC_MAGIC, \

	1, \

	struct gsb_if_config *)

#endif