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4546548789
linux_dsm_epyc7002/drivers/net/wireless/libertas/dev.h
Stefani Seibold 4546548789 kfifo: move struct kfifo in place 
This is a new generic kernel FIFO implementation.

The current kernel fifo API is not very widely used, because it has to
many constrains.  Only 17 files in the current 2.6.31-rc5 used it.
FIFO's are like list's a very basic thing and a kfifo API which handles
the most use case would save a lot of development time and memory
resources.

I think this are the reasons why kfifo is not in use:

 - The API is to simple, important functions are missing
 - A fifo can be only allocated dynamically
 - There is a requirement of a spinlock whether you need it or not
 - There is no support for data records inside a fifo

So I decided to extend the kfifo in a more generic way without blowing up
the API to much.  The new API has the following benefits:

 - Generic usage: For kernel internal use and/or device driver.
 - Provide an API for the most use case.
 - Slim API: The whole API provides 25 functions.
 - Linux style habit.
 - DECLARE_KFIFO, DEFINE_KFIFO and INIT_KFIFO Macros
 - Direct copy_to_user from the fifo and copy_from_user into the fifo.
 - The kfifo itself is an in place member of the using data structure, this save an
   indirection access and does not waste the kernel allocator.
 - Lockless access: if only one reader and one writer is active on the fifo,
   which is the common use case, no additional locking is necessary.
 - Remove spinlock - give the user the freedom of choice what kind of locking to use if
   one is required.
 - Ability to handle records. Three type of records are supported:
   - Variable length records between 0-255 bytes, with a record size
     field of 1 bytes.
   - Variable length records between 0-65535 bytes, with a record size
     field of 2 bytes.
   - Fixed size records, which no record size field.
 - Preserve memory resource.
 - Performance!
 - Easy to use!

This patch:

Since most users want to have the kfifo as part of another object,
reorganize the code to allow including struct kfifo in another data
structure.  This requires changing the kfifo_alloc and kfifo_init
prototypes so that we pass an existing kfifo pointer into them.  This
patch changes the implementation and all existing users.

[akpm@linux-foundation.org: fix warning]
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-22 14:17:55 -08:00

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/**
* This file contains definitions and data structures specific
* to Marvell 802.11 NIC. It contains the Device Information
* structure struct lbs_private..
*/
#ifndef _LBS_DEV_H_
#define _LBS_DEV_H_
#include "mesh.h"
#include "scan.h"
#include "assoc.h"
#include <linux/kfifo.h>
/** sleep_params */
struct sleep_params {
uint16_t sp_error;
uint16_t sp_offset;
uint16_t sp_stabletime;
uint8_t sp_calcontrol;
uint8_t sp_extsleepclk;
uint16_t sp_reserved;
};
/** Private structure for the MV device */
struct lbs_private {
/* Basic networking */
struct net_device *dev;
u32 connect_status;
int infra_open;
struct work_struct mcast_work;
u32 nr_of_multicastmacaddr;
u8 multicastlist[MRVDRV_MAX_MULTICAST_LIST_SIZE][ETH_ALEN];
/* CFG80211 */
struct wireless_dev *wdev;
/* Mesh */
struct net_device *mesh_dev; /* Virtual device */
u32 mesh_connect_status;
struct lbs_mesh_stats mstats;
int mesh_open;
int mesh_fw_ver;
int mesh_autostart_enabled;
uint16_t mesh_tlv;
u8 mesh_ssid[IEEE80211_MAX_SSID_LEN + 1];
u8 mesh_ssid_len;
struct work_struct sync_channel;
/* Monitor mode */
struct net_device *rtap_net_dev;
u32 monitormode;
/* Debugfs */
struct dentry *debugfs_dir;
struct dentry *debugfs_debug;
struct dentry *debugfs_files[6];
struct dentry *events_dir;
struct dentry *debugfs_events_files[6];
struct dentry *regs_dir;
struct dentry *debugfs_regs_files[6];
/* Hardware debugging */
u32 mac_offset;
u32 bbp_offset;
u32 rf_offset;
struct lbs_offset_value offsetvalue;
/* Power management */
u16 psmode;
u32 psstate;
u8 needtowakeup;
/* Deep sleep */
int is_deep_sleep;
int is_auto_deep_sleep_enabled;
int wakeup_dev_required;
int is_activity_detected;
int auto_deep_sleep_timeout; /* in ms */
wait_queue_head_t ds_awake_q;
struct timer_list auto_deepsleep_timer;
/* Hardware access */
void *card;
u8 fw_ready;
u8 surpriseremoved;
int (*hw_host_to_card) (struct lbs_private *priv, u8 type, u8 *payload, u16 nb);
void (*reset_card) (struct lbs_private *priv);
int (*enter_deep_sleep) (struct lbs_private *priv);
int (*exit_deep_sleep) (struct lbs_private *priv);
int (*reset_deep_sleep_wakeup) (struct lbs_private *priv);
/* Adapter info (from EEPROM) */
u32 fwrelease;
u32 fwcapinfo;
u16 regioncode;
u8 current_addr[ETH_ALEN];
/* Command download */
u8 dnld_sent;
/* bit0 1/0=data_sent/data_tx_done,
bit1 1/0=cmd_sent/cmd_tx_done,
all other bits reserved 0 */
u16 seqnum;
struct cmd_ctrl_node *cmd_array;
struct cmd_ctrl_node *cur_cmd;
struct list_head cmdfreeq; /* free command buffers */
struct list_head cmdpendingq; /* pending command buffers */
wait_queue_head_t cmd_pending;
struct timer_list command_timer;
int nr_retries;
int cmd_timed_out;
/* Command responses sent from the hardware to the driver */
int cur_cmd_retcode;
u8 resp_idx;
u8 resp_buf[2][LBS_UPLD_SIZE];
u32 resp_len[2];
/* Events sent from hardware to driver */
struct kfifo event_fifo;
/** thread to service interrupts */
struct task_struct *main_thread;
wait_queue_head_t waitq;
struct workqueue_struct *work_thread;
/** Encryption stuff */
struct lbs_802_11_security secinfo;
struct enc_key wpa_mcast_key;
struct enc_key wpa_unicast_key;
u8 wpa_ie[MAX_WPA_IE_LEN];
u8 wpa_ie_len;
u16 wep_tx_keyidx;
struct enc_key wep_keys[4];
/* Wake On LAN */
uint32_t wol_criteria;
uint8_t wol_gpio;
uint8_t wol_gap;
/* Transmitting */
int tx_pending_len; /* -1 while building packet */
u8 tx_pending_buf[LBS_UPLD_SIZE];
/* protected by hard_start_xmit serialization */
u8 txretrycount;
struct sk_buff *currenttxskb;
/* Locks */
struct mutex lock;
spinlock_t driver_lock;
/* NIC/link operation characteristics */
u16 mac_control;
u8 radio_on;
u8 channel;
s16 txpower_cur;
s16 txpower_min;
s16 txpower_max;
/** Scanning */
struct delayed_work scan_work;
int scan_channel;
/* remember which channel was scanned last, != 0 if currently scanning */
u8 scan_ssid[IEEE80211_MAX_SSID_LEN + 1];
u8 scan_ssid_len;
/* Associating */
struct delayed_work assoc_work;
struct current_bss_params curbssparams;
u8 mode;
struct list_head network_list;
struct list_head network_free_list;
struct bss_descriptor *networks;
struct assoc_request * pending_assoc_req;
struct assoc_request * in_progress_assoc_req;
u16 capability;
uint16_t enablehwauto;
uint16_t ratebitmap;
/* ADHOC */
u16 beacon_period;
u8 beacon_enable;
u8 adhoccreate;
/* WEXT */
char name[DEV_NAME_LEN];
u8 nodename[16];
struct iw_statistics wstats;
u8 cur_rate;
#define MAX_REGION_CHANNEL_NUM 2
struct region_channel region_channel[MAX_REGION_CHANNEL_NUM];
/** Requested Signal Strength*/
u16 SNR[MAX_TYPE_B][MAX_TYPE_AVG];
u16 NF[MAX_TYPE_B][MAX_TYPE_AVG];
u8 RSSI[MAX_TYPE_B][MAX_TYPE_AVG];
u8 rawSNR[DEFAULT_DATA_AVG_FACTOR];
u8 rawNF[DEFAULT_DATA_AVG_FACTOR];
u16 nextSNRNF;
u16 numSNRNF;
};
extern struct cmd_confirm_sleep confirm_sleep;
#endif
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