v4.19.13 snapshot.
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
new file mode 100644
index 0000000..8124815
--- /dev/null
+++ b/include/linux/atmdev.h
@@ -0,0 +1,334 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* atmdev.h - ATM device driver declarations and various related items */
+#ifndef LINUX_ATMDEV_H
+#define LINUX_ATMDEV_H
+
+
+#include <linux/wait.h> /* wait_queue_head_t */
+#include <linux/time.h> /* struct timeval */
+#include <linux/net.h>
+#include <linux/bug.h>
+#include <linux/skbuff.h> /* struct sk_buff */
+#include <linux/uio.h>
+#include <net/sock.h>
+#include <linux/atomic.h>
+#include <linux/refcount.h>
+#include <uapi/linux/atmdev.h>
+
+#ifdef CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+
+extern struct proc_dir_entry *atm_proc_root;
+#endif
+
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+struct compat_atm_iobuf {
+ int length;
+ compat_uptr_t buffer;
+};
+#endif
+
+struct k_atm_aal_stats {
+#define __HANDLE_ITEM(i) atomic_t i
+ __AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+};
+
+
+struct k_atm_dev_stats {
+ struct k_atm_aal_stats aal0;
+ struct k_atm_aal_stats aal34;
+ struct k_atm_aal_stats aal5;
+};
+
+struct device;
+
+enum {
+ ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared
+ by device driver. */
+ ATM_VF_READY, /* VC is ready to transfer data. Set by device
+ driver, cleared by anybody. */
+ ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC
+ setup), controlled by socket layer */
+ ATM_VF_REGIS, /* registered with demon, controlled by SVC
+ socket layer */
+ ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket
+ layer */
+ ATM_VF_RELEASED, /* demon has indicated/requested release,
+ controlled by SVC socket layer */
+ ATM_VF_HASQOS, /* QOS parameters have been set */
+ ATM_VF_LISTEN, /* socket is used for listening */
+ ATM_VF_META, /* SVC socket isn't used for normal data
+ traffic and doesn't depend on signaling
+ to be available */
+ ATM_VF_SESSION, /* VCC is p2mp session control descriptor */
+ ATM_VF_HASSAP, /* SAP has been set */
+ ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/
+ ATM_VF_WAITING, /* waiting for reply from sigd */
+ ATM_VF_IS_CLIP, /* in use by CLIP protocol */
+};
+
+
+#define ATM_VF2VS(flags) \
+ (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
+ test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
+ test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
+ test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
+ test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
+
+
+enum {
+ ATM_DF_REMOVED, /* device was removed from atm_devs list */
+};
+
+
+#define ATM_PHY_SIG_LOST 0 /* no carrier/light */
+#define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */
+#define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */
+
+#define ATM_ATMOPT_CLP 1 /* set CLP bit */
+
+struct atm_vcc {
+ /* struct sock has to be the first member of atm_vcc */
+ struct sock sk;
+ unsigned long flags; /* VCC flags (ATM_VF_*) */
+ short vpi; /* VPI and VCI (types must be equal */
+ /* with sockaddr) */
+ int vci;
+ unsigned long aal_options; /* AAL layer options */
+ unsigned long atm_options; /* ATM layer options */
+ struct atm_dev *dev; /* device back pointer */
+ struct atm_qos qos; /* QOS */
+ struct atm_sap sap; /* SAP */
+ void (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
+ void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
+ void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
+ int (*push_oam)(struct atm_vcc *vcc,void *cell);
+ int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
+ void *dev_data; /* per-device data */
+ void *proto_data; /* per-protocol data */
+ struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
+ struct module *owner; /* owner of ->push function */
+ /* SVC part --- may move later ------------------------------------- */
+ short itf; /* interface number */
+ struct sockaddr_atmsvc local;
+ struct sockaddr_atmsvc remote;
+ /* Multipoint part ------------------------------------------------- */
+ struct atm_vcc *session; /* session VCC descriptor */
+ /* Other stuff ----------------------------------------------------- */
+ void *user_back; /* user backlink - not touched by */
+ /* native ATM stack. Currently used */
+ /* by CLIP and sch_atm. */
+};
+
+static inline struct atm_vcc *atm_sk(struct sock *sk)
+{
+ return (struct atm_vcc *)sk;
+}
+
+static inline struct atm_vcc *ATM_SD(struct socket *sock)
+{
+ return atm_sk(sock->sk);
+}
+
+static inline struct sock *sk_atm(struct atm_vcc *vcc)
+{
+ return (struct sock *)vcc;
+}
+
+struct atm_dev_addr {
+ struct sockaddr_atmsvc addr; /* ATM address */
+ struct list_head entry; /* next address */
+};
+
+enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
+
+struct atm_dev {
+ const struct atmdev_ops *ops; /* device operations; NULL if unused */
+ const struct atmphy_ops *phy; /* PHY operations, may be undefined */
+ /* (NULL) */
+ const char *type; /* device type name */
+ int number; /* device index */
+ void *dev_data; /* per-device data */
+ void *phy_data; /* private PHY date */
+ unsigned long flags; /* device flags (ATM_DF_*) */
+ struct list_head local; /* local ATM addresses */
+ struct list_head lecs; /* LECS ATM addresses learned via ILMI */
+ unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */
+ struct atm_cirange ci_range; /* VPI/VCI range */
+ struct k_atm_dev_stats stats; /* statistics */
+ char signal; /* signal status (ATM_PHY_SIG_*) */
+ int link_rate; /* link rate (default: OC3) */
+ refcount_t refcnt; /* reference count */
+ spinlock_t lock; /* protect internal members */
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_entry; /* proc entry */
+ char *proc_name; /* proc entry name */
+#endif
+ struct device class_dev; /* sysfs device */
+ struct list_head dev_list; /* linkage */
+};
+
+
+/* OF: send_Oam Flags */
+
+#define ATM_OF_IMMED 1 /* Attempt immediate delivery */
+#define ATM_OF_INRATE 2 /* Attempt in-rate delivery */
+
+
+/*
+ * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
+ */
+
+struct atmdev_ops { /* only send is required */
+ void (*dev_close)(struct atm_dev *dev);
+ int (*open)(struct atm_vcc *vcc);
+ void (*close)(struct atm_vcc *vcc);
+ int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
+#ifdef CONFIG_COMPAT
+ int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
+ void __user *arg);
+#endif
+ int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
+ void __user *optval,int optlen);
+ int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
+ void __user *optval,unsigned int optlen);
+ int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
+ int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
+ void (*phy_put)(struct atm_dev *dev,unsigned char value,
+ unsigned long addr);
+ unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
+ int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
+ int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
+ struct module *owner;
+};
+
+struct atmphy_ops {
+ int (*start)(struct atm_dev *dev);
+ int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
+ void (*interrupt)(struct atm_dev *dev);
+ int (*stop)(struct atm_dev *dev);
+};
+
+struct atm_skb_data {
+ struct atm_vcc *vcc; /* ATM VCC */
+ unsigned long atm_options; /* ATM layer options */
+ unsigned int acct_truesize; /* truesize accounted to vcc */
+};
+
+#define VCC_HTABLE_SIZE 32
+
+extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
+extern rwlock_t vcc_sklist_lock;
+
+#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
+
+struct atm_dev *atm_dev_register(const char *type, struct device *parent,
+ const struct atmdev_ops *ops,
+ int number, /* -1 == pick first available */
+ unsigned long *flags);
+struct atm_dev *atm_dev_lookup(int number);
+void atm_dev_deregister(struct atm_dev *dev);
+
+/* atm_dev_signal_change
+ *
+ * Propagate lower layer signal change in atm_dev->signal to netdevice.
+ * The event will be sent via a notifier call chain.
+ */
+void atm_dev_signal_change(struct atm_dev *dev, char signal);
+
+void vcc_insert_socket(struct sock *sk);
+
+void atm_dev_release_vccs(struct atm_dev *dev);
+
+static inline void atm_account_tx(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ /*
+ * Because ATM skbs may not belong to a sock (and we don't
+ * necessarily want to), skb->truesize may be adjusted,
+ * escaping the hack in pskb_expand_head() which avoids
+ * doing so for some cases. So stash the value of truesize
+ * at the time we accounted it, and atm_pop_raw() can use
+ * that value later, in case it changes.
+ */
+ refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ ATM_SKB(skb)->acct_truesize = skb->truesize;
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+}
+
+static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
+{
+ atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
+}
+
+
+static inline void atm_return(struct atm_vcc *vcc,int truesize)
+{
+ atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
+}
+
+
+static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
+{
+ return (size + refcount_read(&sk_atm(vcc)->sk_wmem_alloc)) <
+ sk_atm(vcc)->sk_sndbuf;
+}
+
+
+static inline void atm_dev_hold(struct atm_dev *dev)
+{
+ refcount_inc(&dev->refcnt);
+}
+
+
+static inline void atm_dev_put(struct atm_dev *dev)
+{
+ if (refcount_dec_and_test(&dev->refcnt)) {
+ BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
+ if (dev->ops->dev_close)
+ dev->ops->dev_close(dev);
+ put_device(&dev->class_dev);
+ }
+}
+
+
+int atm_charge(struct atm_vcc *vcc,int truesize);
+struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
+ gfp_t gfp_flags);
+int atm_pcr_goal(const struct atm_trafprm *tp);
+
+void vcc_release_async(struct atm_vcc *vcc, int reply);
+
+struct atm_ioctl {
+ struct module *owner;
+ /* A module reference is kept if appropriate over this call.
+ * Return -ENOIOCTLCMD if you don't handle it. */
+ int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
+ struct list_head list;
+};
+
+/**
+ * register_atm_ioctl - register handler for ioctl operations
+ *
+ * Special (non-device) handlers of ioctl's should
+ * register here. If you're a normal device, you should
+ * set .ioctl in your atmdev_ops instead.
+ */
+void register_atm_ioctl(struct atm_ioctl *);
+
+/**
+ * deregister_atm_ioctl - remove the ioctl handler
+ */
+void deregister_atm_ioctl(struct atm_ioctl *);
+
+
+/* register_atmdevice_notifier - register atm_dev notify events
+ *
+ * Clients like br2684 will register notify events
+ * Currently we notify of signal found/lost
+ */
+int register_atmdevice_notifier(struct notifier_block *nb);
+void unregister_atmdevice_notifier(struct notifier_block *nb);
+
+#endif