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linux/drivers/s390/net/claw.h
Ursula Braun 0ca8cc6fe7 s390: remove cu3088 layer for lcs and ctcm 
The cu3088-driver used as common base for lcs- and ctcm-devices
makes it difficult to assign the appropriate driver to an lcs-device
or a ctcm-device. This patch eliminates the cu3088-driver and thus
the root device "cu3088". Path /sys/devices/cu3088 is replaced with
the pathes /sys/devices/lcs and /sys/devices/ctcm.

Patch is based on a proposal from Cornelia Huck.

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-13 20:47:00 -08:00

355 lines
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/*******************************************************
* Define constants *
* *
********************************************************/
/*-----------------------------------------------------*
* CCW command codes for CLAW protocol *
*------------------------------------------------------*/
#define CCW_CLAW_CMD_WRITE 0x01 /* write - not including link */
#define CCW_CLAW_CMD_READ 0x02 /* read */
#define CCW_CLAW_CMD_NOP 0x03 /* NOP */
#define CCW_CLAW_CMD_SENSE 0x04 /* Sense */
#define CCW_CLAW_CMD_SIGNAL_SMOD 0x05 /* Signal Status Modifier */
#define CCW_CLAW_CMD_TIC 0x08 /* TIC */
#define CCW_CLAW_CMD_READHEADER 0x12 /* read header data */
#define CCW_CLAW_CMD_READFF 0x22 /* read an FF */
#define CCW_CLAW_CMD_SENSEID 0xe4 /* Sense ID */
/*-----------------------------------------------------*
* CLAW Unique constants *
*------------------------------------------------------*/
#define MORE_to_COME_FLAG 0x04 /* OR with write CCW in case of m-t-c */
#define CLAW_IDLE 0x00 /* flag to indicate CLAW is idle */
#define CLAW_BUSY 0xff /* flag to indicate CLAW is busy */
#define CLAW_PENDING 0x00 /* flag to indicate i/o is pending */
#define CLAW_COMPLETE 0xff /* flag to indicate i/o completed */
/*-----------------------------------------------------*
* CLAW control command code *
*------------------------------------------------------*/
#define SYSTEM_VALIDATE_REQUEST 0x01 /* System Validate request */
#define SYSTEM_VALIDATE_RESPONSE 0x02 /* System Validate response */
#define CONNECTION_REQUEST 0x21 /* Connection request */
#define CONNECTION_RESPONSE 0x22 /* Connection response */
#define CONNECTION_CONFIRM 0x23 /* Connection confirm */
#define DISCONNECT 0x24 /* Disconnect */
#define CLAW_ERROR 0x41 /* CLAW error message */
#define CLAW_VERSION_ID 2 /* CLAW version ID */
/*-----------------------------------------------------*
* CLAW adater sense bytes *
*------------------------------------------------------*/
#define CLAW_ADAPTER_SENSE_BYTE 0x41 /* Stop command issued to adapter */
/*-----------------------------------------------------*
* CLAW control command return codes *
*------------------------------------------------------*/
#define CLAW_RC_NAME_MISMATCH 166 /* names do not match */
#define CLAW_RC_WRONG_VERSION 167 /* wrong CLAW version number */
#define CLAW_RC_HOST_RCV_TOO_SMALL 180 /* Host maximum receive is */
/* less than Linux on zSeries*/
/* transmit size */
/*-----------------------------------------------------*
* CLAW Constants application name *
*------------------------------------------------------*/
#define HOST_APPL_NAME "TCPIP "
#define WS_APPL_NAME_IP_LINK "TCPIP "
#define WS_APPL_NAME_IP_NAME "IP "
#define WS_APPL_NAME_API_LINK "API "
#define WS_APPL_NAME_PACKED "PACKED "
#define WS_NAME_NOT_DEF "NOT_DEF "
#define PACKING_ASK 1
#define PACK_SEND 2
#define DO_PACKED 3
#define MAX_ENVELOPE_SIZE 65536
#define CLAW_DEFAULT_MTU_SIZE 4096
#define DEF_PACK_BUFSIZE 32768
#define READ 0
#define WRITE 1
#define TB_TX 0 /* sk buffer handling in process */
#define TB_STOP 1 /* network device stop in process */
#define TB_RETRY 2 /* retry in process */
#define TB_NOBUFFER 3 /* no buffer on free queue */
#define CLAW_MAX_LINK_ID 1
#define CLAW_MAX_DEV 256 /* max claw devices */
#define MAX_NAME_LEN 8 /* host name, adapter name length */
#define CLAW_FRAME_SIZE 4096
#define CLAW_ID_SIZE 20+3
/* state machine codes used in claw_irq_handler */
#define CLAW_STOP 0
#define CLAW_START_HALT_IO 1
#define CLAW_START_SENSEID 2
#define CLAW_START_READ 3
#define CLAW_START_WRITE 4
/*-----------------------------------------------------*
* Lock flag *
*------------------------------------------------------*/
#define LOCK_YES 0
#define LOCK_NO 1
/*-----------------------------------------------------*
* DBF Debug macros *
*------------------------------------------------------*/
#define CLAW_DBF_TEXT(level, name, text) \
do { \
debug_text_event(claw_dbf_##name, level, text); \
} while (0)
#define CLAW_DBF_HEX(level,name,addr,len) \
do { \
debug_event(claw_dbf_##name,level,(void*)(addr),len); \
} while (0)
/* Allow to sort out low debug levels early to avoid wasted sprints */
static inline int claw_dbf_passes(debug_info_t *dbf_grp, int level)
{
return (level <= dbf_grp->level);
}
#define CLAW_DBF_TEXT_(level,name,text...) \
do { \
if (claw_dbf_passes(claw_dbf_##name, level)) { \
sprintf(debug_buffer, text); \
debug_text_event(claw_dbf_##name, level, \
debug_buffer); \
} \
} while (0)
/**
* Enum for classifying detected devices.
*/
enum claw_channel_types {
/* Device is not a channel */
claw_channel_type_none,
/* Device is a CLAW channel device */
claw_channel_type_claw
};
/*******************************************************
* Define Control Blocks *
* *
********************************************************/
/*------------------------------------------------------*/
/* CLAW header */
/*------------------------------------------------------*/
struct clawh {
__u16 length; /* length of data read by preceding read CCW */
__u8 opcode; /* equivalent read CCW */
__u8 flag; /* flag of FF to indicate read was completed */
};
/*------------------------------------------------------*/
/* CLAW Packing header 4 bytes */
/*------------------------------------------------------*/
struct clawph {
__u16 len; /* Length of Packed Data Area */
__u8 flag; /* Reserved not used */
__u8 link_num; /* Link ID */
};
/*------------------------------------------------------*/
/* CLAW Ending struct ccwbk */
/*------------------------------------------------------*/
struct endccw {
__u32 real; /* real address of this block */
__u8 write1; /* write 1 is active */
__u8 read1; /* read 1 is active */
__u16 reserved; /* reserved for future use */
struct ccw1 write1_nop1;
struct ccw1 write1_nop2;
struct ccw1 write2_nop1;
struct ccw1 write2_nop2;
struct ccw1 read1_nop1;
struct ccw1 read1_nop2;
struct ccw1 read2_nop1;
struct ccw1 read2_nop2;
};
/*------------------------------------------------------*/
/* CLAW struct ccwbk */
/*------------------------------------------------------*/
struct ccwbk {
void *next; /* pointer to next ccw block */
__u32 real; /* real address of this ccw */
void *p_buffer; /* virtual address of data */
struct clawh header; /* claw header */
struct ccw1 write; /* write CCW */
struct ccw1 w_read_FF; /* read FF */
struct ccw1 w_TIC_1; /* TIC */
struct ccw1 read; /* read CCW */
struct ccw1 read_h; /* read header */
struct ccw1 signal; /* signal SMOD */
struct ccw1 r_TIC_1; /* TIC1 */
struct ccw1 r_read_FF; /* read FF */
struct ccw1 r_TIC_2; /* TIC2 */
};
/*------------------------------------------------------*/
/* CLAW control block */
/*------------------------------------------------------*/
struct clawctl {
__u8 command; /* control command */
__u8 version; /* CLAW protocol version */
__u8 linkid; /* link ID */
__u8 correlator; /* correlator */
__u8 rc; /* return code */
__u8 reserved1; /* reserved */
__u8 reserved2; /* reserved */
__u8 reserved3; /* reserved */
__u8 data[24]; /* command specific fields */
};
/*------------------------------------------------------*/
/* Data for SYSTEMVALIDATE command */
/*------------------------------------------------------*/
struct sysval {
char WS_name[8]; /* Workstation System name */
char host_name[8]; /* Host system name */
__u16 read_frame_size; /* read frame size */
__u16 write_frame_size; /* write frame size */
__u8 reserved[4]; /* reserved */
};
/*------------------------------------------------------*/
/* Data for Connect command */
/*------------------------------------------------------*/
struct conncmd {
char WS_name[8]; /* Workstation application name */
char host_name[8]; /* Host application name */
__u16 reserved1[2]; /* read frame size */
__u8 reserved2[4]; /* reserved */
};
/*------------------------------------------------------*/
/* Data for CLAW error */
/*------------------------------------------------------*/
struct clawwerror {
char reserved1[8]; /* reserved */
char reserved2[8]; /* reserved */
char reserved3[8]; /* reserved */
};
/*------------------------------------------------------*/
/* Data buffer for CLAW */
/*------------------------------------------------------*/
struct clawbuf {
char buffer[MAX_ENVELOPE_SIZE]; /* data buffer */
};
/*------------------------------------------------------*/
/* Channel control block for read and write channel */
/*------------------------------------------------------*/
struct chbk {
unsigned int devno;
int irq;
char id[CLAW_ID_SIZE];
__u32 IO_active;
__u8 claw_state;
struct irb *irb;
struct ccw_device *cdev; /* pointer to the channel device */
struct net_device *ndev;
wait_queue_head_t wait;
struct tasklet_struct tasklet;
struct timer_list timer;
unsigned long flag_a; /* atomic flags */
#define CLAW_BH_ACTIVE 0
unsigned long flag_b; /* atomic flags */
#define CLAW_WRITE_ACTIVE 0
__u8 last_dstat;
__u8 flag;
struct sk_buff_head collect_queue;
spinlock_t collect_lock;
#define CLAW_WRITE 0x02 /* - Set if this is a write channel */
#define CLAW_READ 0x01 /* - Set if this is a read channel */
#define CLAW_TIMER 0x80 /* - Set if timer made the wake_up */
};
/*--------------------------------------------------------------*
* CLAW environment block *
*---------------------------------------------------------------*/
struct claw_env {
unsigned int devno[2]; /* device number */
char host_name[9]; /* Host name */
char adapter_name [9]; /* adapter name */
char api_type[9]; /* TCPIP, API or PACKED */
void *p_priv; /* privptr */
__u16 read_buffers; /* read buffer number */
__u16 write_buffers; /* write buffer number */
__u16 read_size; /* read buffer size */
__u16 write_size; /* write buffer size */
__u16 dev_id; /* device ident */
__u8 packing; /* are we packing? */
__u8 in_use; /* device active flag */
struct net_device *ndev; /* backward ptr to the net dev*/
};
/*--------------------------------------------------------------*
* CLAW main control block *
*---------------------------------------------------------------*/
struct claw_privbk {
void *p_buff_ccw;
__u32 p_buff_ccw_num;
void *p_buff_read;
__u32 p_buff_read_num;
__u32 p_buff_pages_perread;
void *p_buff_write;
__u32 p_buff_write_num;
__u32 p_buff_pages_perwrite;
long active_link_ID; /* Active logical link ID */
struct ccwbk *p_write_free_chain; /* pointer to free ccw chain */
struct ccwbk *p_write_active_first; /* ptr to the first write ccw */
struct ccwbk *p_write_active_last; /* ptr to the last write ccw */
struct ccwbk *p_read_active_first; /* ptr to the first read ccw */
struct ccwbk *p_read_active_last; /* ptr to the last read ccw */
struct endccw *p_end_ccw; /*ptr to ending ccw */
struct ccwbk *p_claw_signal_blk; /* ptr to signal block */
__u32 write_free_count; /* number of free bufs for write */
struct net_device_stats stats; /* device status */
struct chbk channel[2]; /* Channel control blocks */
__u8 mtc_skipping;
int mtc_offset;
int mtc_logical_link;
void *p_mtc_envelope;
struct sk_buff *pk_skb; /* packing buffer */
int pk_cnt;
struct clawctl ctl_bk;
struct claw_env *p_env;
__u8 system_validate_comp;
__u8 release_pend;
__u8 checksum_received_ip_pkts;
__u8 buffs_alloc;
struct endccw end_ccw;
unsigned long tbusy;
};
/************************************************************/
/* define global constants */
/************************************************************/
#define CCWBK_SIZE sizeof(struct ccwbk)
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