--- /dev/null
+/*
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Fritz Elfert (felfert@millenux.com)
+ * Peter Tiedemann (ptiedem@de.ibm.com)
+ */
+
+#ifndef _CTCM_MAIN_H_
+#define _CTCM_MAIN_H_
+
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+
+#include "fsm.h"
+#include "ctcm_dbug.h"
+#include "ctcm_mpc.h"
+
+#define CTC_DRIVER_NAME "ctcm"
+#define CTC_DEVICE_NAME "ctc"
+#define MPC_DEVICE_NAME "mpc"
+#define CTC_DEVICE_GENE CTC_DEVICE_NAME "%d"
+#define MPC_DEVICE_GENE MPC_DEVICE_NAME "%d"
+
+#define CHANNEL_FLAGS_READ 0
+#define CHANNEL_FLAGS_WRITE 1
+#define CHANNEL_FLAGS_INUSE 2
+#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
+#define CHANNEL_FLAGS_FAILED 8
+#define CHANNEL_FLAGS_WAITIRQ 16
+#define CHANNEL_FLAGS_RWMASK 1
+#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
+
+#define LOG_FLAG_ILLEGALPKT 1
+#define LOG_FLAG_ILLEGALSIZE 2
+#define LOG_FLAG_OVERRUN 4
+#define LOG_FLAG_NOMEM 8
+
+#define ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
+
+#define CTCM_PR_DEBUG(fmt, arg...) \
+ do { \
+ if (do_debug) \
+ printk(KERN_DEBUG fmt, ##arg); \
+ } while (0)
+
+#define CTCM_PR_DBGDATA(fmt, arg...) \
+ do { \
+ if (do_debug_data) \
+ printk(KERN_DEBUG fmt, ##arg); \
+ } while (0)
+
+#define CTCM_D3_DUMP(buf, len) \
+ do { \
+ if (do_debug_data) \
+ ctcmpc_dumpit(buf, len); \
+ } while (0)
+
+#define CTCM_CCW_DUMP(buf, len) \
+ do { \
+ if (do_debug_ccw) \
+ ctcmpc_dumpit(buf, len); \
+ } while (0)
+
+/**
+ * Enum for classifying detected devices
+ */
+enum ctcm_channel_types {
+ /* Device is not a channel */
+ ctcm_channel_type_none,
+
+ /* Device is a CTC/A */
+ ctcm_channel_type_parallel,
+
+ /* Device is a FICON channel */
+ ctcm_channel_type_ficon,
+
+ /* Device is a ESCON channel */
+ ctcm_channel_type_escon
+};
+
+/*
+ * CCW commands, used in this driver.
+ */
+#define CCW_CMD_WRITE 0x01
+#define CCW_CMD_READ 0x02
+#define CCW_CMD_NOOP 0x03
+#define CCW_CMD_TIC 0x08
+#define CCW_CMD_SENSE_CMD 0x14
+#define CCW_CMD_WRITE_CTL 0x17
+#define CCW_CMD_SET_EXTENDED 0xc3
+#define CCW_CMD_PREPARE 0xe3
+
+#define CTCM_PROTO_S390 0
+#define CTCM_PROTO_LINUX 1
+#define CTCM_PROTO_LINUX_TTY 2
+#define CTCM_PROTO_OS390 3
+#define CTCM_PROTO_MPC 4
+#define CTCM_PROTO_MAX 4
+
+#define CTCM_BUFSIZE_LIMIT 65535
+#define CTCM_BUFSIZE_DEFAULT 32768
+#define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT
+
+#define CTCM_TIME_1_SEC 1000
+#define CTCM_TIME_5_SEC 5000
+#define CTCM_TIME_10_SEC 10000
+
+#define CTCM_INITIAL_BLOCKLEN 2
+
+#define CTCM_READ 0
+#define CTCM_WRITE 1
+
+#define CTCM_ID_SIZE 20+3
+
+struct ctcm_profile {
+ unsigned long maxmulti;
+ unsigned long maxcqueue;
+ unsigned long doios_single;
+ unsigned long doios_multi;
+ unsigned long txlen;
+ unsigned long tx_time;
+ unsigned long send_stamp;
+};
+
+/*
+ * Definition of one channel
+ */
+struct channel {
+ struct channel *next;
+ char id[CTCM_ID_SIZE];
+ struct ccw_device *cdev;
+ /*
+ * Type of this channel.
+ * CTC/A or Escon for valid channels.
+ */
+ enum ctcm_channel_types type;
+ /*
+ * Misc. flags. See CHANNEL_FLAGS_... below
+ */
+ __u32 flags;
+ __u16 protocol; /* protocol of this channel (4 = MPC) */
+ /*
+ * I/O and irq related stuff
+ */
+ struct ccw1 *ccw;
+ struct irb *irb;
+ /*
+ * RX/TX buffer size
+ */
+ int max_bufsize;
+ struct sk_buff *trans_skb; /* transmit/receive buffer */
+ struct sk_buff_head io_queue; /* universal I/O queue */
+ struct tasklet_struct ch_tasklet; /* MPC ONLY */
+ /*
+ * TX queue for collecting skb's during busy.
+ */
+ struct sk_buff_head collect_queue;
+ /*
+ * Amount of data in collect_queue.
+ */
+ int collect_len;
+ /*
+ * spinlock for collect_queue and collect_len
+ */
+ spinlock_t collect_lock;
+ /*
+ * Timer for detecting unresposive
+ * I/O operations.
+ */
+ fsm_timer timer;
+ /* MPC ONLY section begin */
+ __u32 th_seq_num; /* SNA TH seq number */
+ __u8 th_seg;
+ __u32 pdu_seq;
+ struct sk_buff *xid_skb;
+ char *xid_skb_data;
+ struct th_header *xid_th;
+ struct xid2 *xid;
+ char *xid_id;
+ struct th_header *rcvd_xid_th;
+ struct xid2 *rcvd_xid;
+ char *rcvd_xid_id;
+ __u8 in_mpcgroup;
+ fsm_timer sweep_timer;
+ struct sk_buff_head sweep_queue;
+ struct th_header *discontact_th;
+ struct tasklet_struct ch_disc_tasklet;
+ /* MPC ONLY section end */
+
+ int retry; /* retry counter for misc. operations */
+ fsm_instance *fsm; /* finite state machine of this channel */
+ struct net_device *netdev; /* corresponding net_device */
+ struct ctcm_profile prof;
+ __u8 *trans_skb_data;
+ __u16 logflags;
+ __u8 sense_rc; /* last unit check sense code report control */
+};
+
+struct ctcm_priv {
+ struct net_device_stats stats;
+ unsigned long tbusy;
+
+ /* The MPC group struct of this interface */
+ struct mpc_group *mpcg; /* MPC only */
+ struct xid2 *xid; /* MPC only */
+
+ /* The finite state machine of this interface */
+ fsm_instance *fsm;
+
+ /* The protocol of this device */
+ __u16 protocol;
+
+ /* Timer for restarting after I/O Errors */
+ fsm_timer restart_timer;
+
+ int buffer_size; /* ctc only */
+
+ struct channel *channel[2];
+};
+
+int ctcm_open(struct net_device *dev);
+int ctcm_close(struct net_device *dev);
+
+extern const struct attribute_group *ctcm_attr_groups[];
+
+/*
+ * Compatibility macros for busy handling
+ * of network devices.
+ */
+static inline void ctcm_clear_busy_do(struct net_device *dev)
+{
+ clear_bit(0, &(((struct ctcm_priv *)dev->ml_priv)->tbusy));
+ netif_wake_queue(dev);
+}
+
+static inline void ctcm_clear_busy(struct net_device *dev)
+{
+ struct mpc_group *grp;
+ grp = ((struct ctcm_priv *)dev->ml_priv)->mpcg;
+
+ if (!(grp && grp->in_sweep))
+ ctcm_clear_busy_do(dev);
+}
+
+
+static inline int ctcm_test_and_set_busy(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return test_and_set_bit(0,
+ &(((struct ctcm_priv *)dev->ml_priv)->tbusy));
+}
+
+extern int loglevel;
+extern struct channel *channels;
+
+void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb);
+
+/*
+ * Functions related to setup and device detection.
+ */
+
+static inline int ctcm_less_than(char *id1, char *id2)
+{
+ unsigned long dev1, dev2;
+
+ id1 = id1 + 5;
+ id2 = id2 + 5;
+
+ dev1 = simple_strtoul(id1, &id1, 16);
+ dev2 = simple_strtoul(id2, &id2, 16);
+
+ return (dev1 < dev2);
+}
+
+int ctcm_ch_alloc_buffer(struct channel *ch);
+
+static inline int ctcm_checkalloc_buffer(struct channel *ch)
+{
+ if (ch->trans_skb == NULL)
+ return ctcm_ch_alloc_buffer(ch);
+ if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) {
+ dev_kfree_skb(ch->trans_skb);
+ return ctcm_ch_alloc_buffer(ch);
+ }
+ return 0;
+}
+
+struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv);
+
+/* test if protocol attribute (of struct ctcm_priv or struct channel)
+ * has MPC protocol setting. Type is not checked
+ */
+#define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC)
+
+/* test if struct ctcm_priv of struct net_device has MPC protocol setting */
+#define IS_MPCDEV(dev) IS_MPC((struct ctcm_priv *)dev->ml_priv)
+
+static inline gfp_t gfp_type(void)
+{
+ return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
+}
+
+/*
+ * Definition of our link level header.
+ */
+struct ll_header {
+ __u16 length;
+ __u16 type;
+ __u16 unused;
+};
+#define LL_HEADER_LENGTH (sizeof(struct ll_header))
+
+#endif
Code Review / kvmfornfv.git / blobdiff