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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-02-23 09:24:42 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-06 21:23:02 -0500
commit2b49e0c56741fca538176f66ed3c8d16ce4fccd8 (patch)
treed2246e177136d99847de6b2da31ded7efa84e2f0 /include/linux/platform_data
parent84e0185efaf8de931e1aab0687d8f8acd186a1c0 (diff)
dmaengine: append hsu DMA driver
The HSU DMA is developed to support High Speed UART controllers found in particular on Intel MID platforms such as Intel Medfield. The existing implementation is tighten to the drivers/tty/serial/mfd.c driver and has a lot of disadvantages. Besides that we would like to get rid of the old HS UART driver in regarding to extending the 8250 which supports generic DMAEngine API. That's why the current driver has been developed. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/platform_data')
-rw-r--r--include/linux/platform_data/dma-hsu.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/platform_data/dma-hsu.h b/include/linux/platform_data/dma-hsu.h
new file mode 100644
index 000000000000..8a1f6a4920b2
--- /dev/null
+++ b/include/linux/platform_data/dma-hsu.h
@@ -0,0 +1,25 @@
1/*
2 * Driver for the High Speed UART DMA
3 *
4 * Copyright (C) 2015 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef _PLATFORM_DATA_DMA_HSU_H
12#define _PLATFORM_DATA_DMA_HSU_H
13
14#include <linux/device.h>
15
16struct hsu_dma_slave {
17 struct device *dma_dev;
18 int chan_id;
19};
20
21struct hsu_dma_platform_data {
22 unsigned short nr_channels;
23};
24
25#endif /* _PLATFORM_DATA_DMA_HSU_H */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-21 05:31:01 -0500
ef='#n501'>501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET  is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the Forwarding Information Base.
 *
 * Authors:	A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru>
 */

#ifndef _NET_IP_FIB_H
#define _NET_IP_FIB_H

#include <net/flow.h>
#include <linux/seq_file.h>
#include <linux/rcupdate.h>
#include <net/fib_notifier.h>
#include <net/fib_rules.h>
#include <net/inetpeer.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/refcount.h>

struct fib_config {
	u8			fc_dst_len;
	u8			fc_tos;
	u8			fc_protocol;
	u8			fc_scope;
	u8			fc_type;
	u8			fc_gw_family;
	/* 2 bytes unused */
	u32			fc_table;
	__be32			fc_dst;
	union {
		__be32		fc_gw4;
		struct in6_addr	fc_gw6;
	};
	int			fc_oif;
	u32			fc_flags;
	u32			fc_priority;
	__be32			fc_prefsrc;
	u32			fc_nh_id;
	struct nlattr		*fc_mx;
	struct rtnexthop	*fc_mp;
	int			fc_mx_len;
	int			fc_mp_len;
	u32			fc_flow;
	u32			fc_nlflags;
	struct nl_info		fc_nlinfo;
	struct nlattr		*fc_encap;
	u16			fc_encap_type;
};

struct fib_info;
struct rtable;

struct fib_nh_exception {
	struct fib_nh_exception __rcu	*fnhe_next;
	int				fnhe_genid;
	__be32				fnhe_daddr;
	u32				fnhe_pmtu;
	bool				fnhe_mtu_locked;
	__be32				fnhe_gw;
	unsigned long			fnhe_expires;
	struct rtable __rcu		*fnhe_rth_input;
	struct rtable __rcu		*fnhe_rth_output;
	unsigned long			fnhe_stamp;
	struct rcu_head			rcu;
};

struct fnhe_hash_bucket {
	struct fib_nh_exception __rcu	*chain;
};

#define FNHE_HASH_SHIFT		11
#define FNHE_HASH_SIZE		(1 << FNHE_HASH_SHIFT)
#define FNHE_RECLAIM_DEPTH	5

struct fib_nh_common {
	struct net_device	*nhc_dev;
	int			nhc_oif;
	unsigned char		nhc_scope;
	u8			nhc_family;
	u8			nhc_gw_family;
	unsigned char		nhc_flags;
	struct lwtunnel_state	*nhc_lwtstate;

	union {
		__be32          ipv4;
		struct in6_addr ipv6;
	} nhc_gw;

	int			nhc_weight;
	atomic_t		nhc_upper_bound;

	/* v4 specific, but allows fib6_nh with v4 routes */
	struct rtable __rcu * __percpu *nhc_pcpu_rth_output;
	struct rtable __rcu     *nhc_rth_input;
	struct fnhe_hash_bucket	__rcu *nhc_exceptions;
};

struct fib_nh {
	struct fib_nh_common	nh_common;
	struct hlist_node	nh_hash;
	struct fib_info		*nh_parent;
#ifdef CONFIG_IP_ROUTE_CLASSID
	__u32			nh_tclassid;
#endif
	__be32			nh_saddr;
	int			nh_saddr_genid;
#define fib_nh_family		nh_common.nhc_family
#define fib_nh_dev		nh_common.nhc_dev
#define fib_nh_oif		nh_common.nhc_oif
#define fib_nh_flags		nh_common.nhc_flags
#define fib_nh_lws		nh_common.nhc_lwtstate
#define fib_nh_scope		nh_common.nhc_scope
#define fib_nh_gw_family	nh_common.nhc_gw_family
#define fib_nh_gw4		nh_common.nhc_gw.ipv4
#define fib_nh_gw6		nh_common.nhc_gw.ipv6
#define fib_nh_weight		nh_common.nhc_weight
#define fib_nh_upper_bound	nh_common.nhc_upper_bound
};

/*
 * This structure contains data shared by many of routes.
 */

struct nexthop;

struct fib_info {
	struct hlist_node	fib_hash;
	struct hlist_node	fib_lhash;
	struct list_head	nh_list;
	struct net		*fib_net;
	int			fib_treeref;
	refcount_t		fib_clntref;
	unsigned int		fib_flags;
	unsigned char		fib_dead;
	unsigned char		fib_protocol;
	unsigned char		fib_scope;
	unsigned char		fib_type;
	__be32			fib_prefsrc;
	u32			fib_tb_id;
	u32			fib_priority;
	struct dst_metrics	*fib_metrics;
#define fib_mtu fib_metrics->metrics[RTAX_MTU-1]
#define fib_window fib_metrics->metrics[RTAX_WINDOW-1]
#define fib_rtt fib_metrics->metrics[RTAX_RTT-1]
#define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
	int			fib_nhs;
	bool			fib_nh_is_v6;
	bool			nh_updated;
	struct nexthop		*nh;
	struct rcu_head		rcu;
	struct fib_nh		fib_nh[0];
};


#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rule;
#endif

struct fib_table;
struct fib_result {
	__be32			prefix;
	unsigned char		prefixlen;
	unsigned char		nh_sel;
	unsigned char		type;
	unsigned char		scope;
	u32			tclassid;
	struct fib_nh_common	*nhc;
	struct fib_info		*fi;
	struct fib_table	*table;
	struct hlist_head	*fa_head;
};

struct fib_result_nl {
	__be32		fl_addr;   /* To be looked up*/
	u32		fl_mark;
	unsigned char	fl_tos;
	unsigned char   fl_scope;
	unsigned char   tb_id_in;

	unsigned char   tb_id;      /* Results */
	unsigned char	prefixlen;
	unsigned char	nh_sel;
	unsigned char	type;
	unsigned char	scope;
	int             err;
};

#ifdef CONFIG_IP_MULTIPLE_TABLES
#define FIB_TABLE_HASHSZ 256
#else
#define FIB_TABLE_HASHSZ 2
#endif

__be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc,
				 unsigned char scope);
__be32 fib_result_prefsrc(struct net *net, struct fib_result *res);

#define FIB_RES_NHC(res)		((res).nhc)
#define FIB_RES_DEV(res)	(FIB_RES_NHC(res)->nhc_dev)
#define FIB_RES_OIF(res)	(FIB_RES_NHC(res)->nhc_oif)

struct fib_entry_notifier_info {
	struct fib_notifier_info info; /* must be first */
	u32 dst;
	int dst_len;
	struct fib_info *fi;
	u8 tos;
	u8 type;
	u32 tb_id;
};

struct fib_nh_notifier_info {
	struct fib_notifier_info info; /* must be first */
	struct fib_nh *fib_nh;
};

int call_fib4_notifier(struct notifier_block *nb, struct net *net,
		       enum fib_event_type event_type,
		       struct fib_notifier_info *info);
int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
			struct fib_notifier_info *info);

int __net_init fib4_notifier_init(struct net *net);
void __net_exit fib4_notifier_exit(struct net *net);

void fib_info_notify_update(struct net *net, struct nl_info *info);
void fib_notify(struct net *net, struct notifier_block *nb);

struct fib_table {
	struct hlist_node	tb_hlist;
	u32			tb_id;
	int			tb_num_default;
	struct rcu_head		rcu;
	unsigned long 		*tb_data;
	unsigned long		__data[0];
};

struct fib_dump_filter {
	u32			table_id;
	/* filter_set is an optimization that an entry is set */
	bool			filter_set;
	bool			dump_all_families;
	bool			dump_routes;
	bool			dump_exceptions;
	unsigned char		protocol;
	unsigned char		rt_type;
	unsigned int		flags;
	struct net_device	*dev;
};

int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
		     struct fib_result *res, int fib_flags);
int fib_table_insert(struct net *, struct fib_table *, struct fib_config *,
		     struct netlink_ext_ack *extack);
int fib_table_delete(struct net *, struct fib_table *, struct fib_config *,
		     struct netlink_ext_ack *extack);
int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
		   struct netlink_callback *cb, struct fib_dump_filter *filter);
int fib_table_flush(struct net *net, struct fib_table *table, bool flush_all);
struct fib_table *fib_trie_unmerge(struct fib_table *main_tb);
void fib_table_flush_external(struct fib_table *table);
void fib_free_table(struct fib_table *tb);

#ifndef CONFIG_IP_MULTIPLE_TABLES

#define TABLE_LOCAL_INDEX	(RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1))
#define TABLE_MAIN_INDEX	(RT_TABLE_MAIN  & (FIB_TABLE_HASHSZ - 1))

static inline struct fib_table *fib_get_table(struct net *net, u32 id)
{
	struct hlist_node *tb_hlist;
	struct hlist_head *ptr;

	ptr = id == RT_TABLE_LOCAL ?
		&net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
		&net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];

	tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr));

	return hlist_entry(tb_hlist, struct fib_table, tb_hlist);
}

static inline struct fib_table *fib_new_table(struct net *net, u32 id)
{
	return fib_get_table(net, id);
}

static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
			     struct fib_result *res, unsigned int flags)
{
	struct fib_table *tb;
	int err = -ENETUNREACH;

	rcu_read_lock();

	tb = fib_get_table(net, RT_TABLE_MAIN);
	if (tb)
		err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF);

	if (err == -EAGAIN)
		err = -ENETUNREACH;

	rcu_read_unlock();

	return err;
}

static inline bool fib4_rule_default(const struct fib_rule *rule)
{
	return true;
}

static inline int fib4_rules_dump(struct net *net, struct notifier_block *nb)
{
	return 0;
}

static inline unsigned int fib4_rules_seq_read(struct net *net)
{
	return 0;
}

static inline bool fib4_rules_early_flow_dissect(struct net *net,
						 struct sk_buff *skb,
						 struct flowi4 *fl4,
						 struct flow_keys *flkeys)
{
	return false;
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
int __net_init fib4_rules_init(struct net *net);
void __net_exit fib4_rules_exit(struct net *net);

struct fib_table *fib_new_table(struct net *net, u32 id);
struct fib_table *fib_get_table(struct net *net, u32 id);

int __fib_lookup(struct net *net, struct flowi4 *flp,
		 struct fib_result *res, unsigned int flags);

static inline int fib_lookup(struct net *net, struct flowi4 *flp,
			     struct fib_result *res, unsigned int flags)
{
	struct fib_table *tb;
	int err = -ENETUNREACH;

	flags |= FIB_LOOKUP_NOREF;
	if (net->ipv4.fib_has_custom_rules)
		return __fib_lookup(net, flp, res, flags);

	rcu_read_lock();

	res->tclassid = 0;

	tb = rcu_dereference_rtnl(net->ipv4.fib_main);
	if (tb)
		err = fib_table_lookup(tb, flp, res, flags);

	if (!err)
		goto out;

	tb = rcu_dereference_rtnl(net->ipv4.fib_default);
	if (tb)
		err = fib_table_lookup(tb, flp, res, flags);

out:
	if (err == -EAGAIN)
		err = -ENETUNREACH;

	rcu_read_unlock();

	return err;
}

bool fib4_rule_default(const struct fib_rule *rule);
int fib4_rules_dump(struct net *net, struct notifier_block *nb);
unsigned int fib4_rules_seq_read(struct net *net);

static inline bool fib4_rules_early_flow_dissect(struct net *net,
						 struct sk_buff *skb,
						 struct flowi4 *fl4,
						 struct flow_keys *flkeys)
{
	unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP;

	if (!net->ipv4.fib_rules_require_fldissect)
		return false;

	skb_flow_dissect_flow_keys(skb, flkeys, flag);
	fl4->fl4_sport = flkeys->ports.src;
	fl4->fl4_dport = flkeys->ports.dst;
	fl4->flowi4_proto = flkeys->basic.ip_proto;

	return true;
}

#endif /* CONFIG_IP_MULTIPLE_TABLES */

/* Exported by fib_frontend.c */
extern const struct nla_policy rtm_ipv4_policy[];
void ip_fib_init(void);
int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla,
		    struct netlink_ext_ack *extack);
__be32 fib_compute_spec_dst(struct sk_buff *skb);
bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev);
int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
			u8 tos, int oif, struct net_device *dev,
			struct in_device *idev, u32 *itag);
#ifdef CONFIG_IP_ROUTE_CLASSID
static inline int fib_num_tclassid_users(struct net *net)
{
	return net->ipv4.fib_num_tclassid_users;
}
#else
static inline int fib_num_tclassid_users(struct net *net)
{
	return 0;
}
#endif
int fib_unmerge(struct net *net);

/* Exported by fib_semantics.c */
int ip_fib_check_default(__be32 gw, struct net_device *dev);
int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force);
int fib_sync_down_addr(struct net_device *dev, __be32 local);
int fib_sync_up(struct net_device *dev, unsigned char nh_flags);
void fib_sync_mtu(struct net_device *dev, u32 orig_mtu);
void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig);

#ifdef CONFIG_IP_ROUTE_MULTIPATH
int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4,
		       const struct sk_buff *skb, struct flow_keys *flkeys);
#endif
int fib_check_nh(struct net *net, struct fib_nh *nh, u32 table, u8 scope,
		 struct netlink_ext_ack *extack);
void fib_select_multipath(struct fib_result *res, int hash);
void fib_select_path(struct net *net, struct fib_result *res,
		     struct flowi4 *fl4, const struct sk_buff *skb);

int fib_nh_init(struct net *net, struct fib_nh *fib_nh,
		struct fib_config *cfg, int nh_weight,
		struct netlink_ext_ack *extack);
void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
int fib_nh_common_init(struct fib_nh_common *nhc, struct nlattr *fc_encap,
		       u16 fc_encap_type, void *cfg, gfp_t gfp_flags,
		       struct netlink_ext_ack *extack);
void fib_nh_common_release(struct fib_nh_common *nhc);

/* Exported by fib_trie.c */
void fib_trie_init(void);
struct fib_table *fib_trie_table(u32 id, struct fib_table *alias);

static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
{
#ifdef CONFIG_IP_ROUTE_CLASSID
	struct fib_nh_common *nhc = res->nhc;
#ifdef CONFIG_IP_MULTIPLE_TABLES
	u32 rtag;
#endif
	if (nhc->nhc_family == AF_INET) {
		struct fib_nh *nh;

		nh = container_of(nhc, struct fib_nh, nh_common);
		*itag = nh->nh_tclassid << 16;
	} else {
		*itag = 0;
	}

#ifdef CONFIG_IP_MULTIPLE_TABLES
	rtag = res->tclassid;
	if (*itag == 0)
		*itag = (rtag<<16);
	*itag |= (rtag>>16);
#endif
#endif
}

void fib_flush(struct net *net);
void free_fib_info(struct fib_info *fi);

static inline void fib_info_hold(struct fib_info *fi)
{
	refcount_inc(&fi->fib_clntref);
}

static inline void fib_info_put(struct fib_info *fi)
{
	if (refcount_dec_and_test(&fi->fib_clntref))
		free_fib_info(fi);
}

#ifdef CONFIG_PROC_FS
int __net_init fib_proc_init(struct net *net);
void __net_exit fib_proc_exit(struct net *net);
#else
static inline int fib_proc_init(struct net *net)
{
	return 0;
}
static inline void fib_proc_exit(struct net *net)
{
}
#endif

u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr);

int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
			  struct fib_dump_filter *filter,
			  struct netlink_callback *cb);

int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh,
		     unsigned char *flags, bool skip_oif);
int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh,
		    int nh_weight);
#endif  /* _NET_FIB_H */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-21 05:31:01 -0500