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linux/drivers/s390/net/lcs.h
Frank Pavlic 0d613a27cc [PATCH] s390: lcs performance enhancements 
[patch 1/2] s390: lcs performance enhancements

From: Klaus Wacker <kdwacker@de.ibm.com>
	- When flood pinging (with large packet size) an LCS device,
	  about 90 % of all packets are dropped by driver.
	- increased number of lcs IO buffers to 32.
	- use netif_stop_queue/netif_wake_queue in lcs_start_xmit routine
	- don't lock the whole xmit routine but just the piece of code where
	  tx_buffer is touched.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>

diffstat:
 lcs.c |   31 +++++++++++++++++--------------
 lcs.h |    2 +-
 2 files changed, 18 insertions(+), 15 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-02-17 16:16:39 -05:00

320 lines
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/*lcs.h*/
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <asm/ccwdev.h>
#define LCS_DBF_TEXT(level, name, text) \
do { \
debug_text_event(lcs_dbf_##name, level, text); \
} while (0)
#define LCS_DBF_HEX(level,name,addr,len) \
do { \
debug_event(lcs_dbf_##name,level,(void*)(addr),len); \
} while (0)
#define LCS_DBF_TEXT_(level,name,text...) \
do { \
sprintf(debug_buffer, text); \
debug_text_event(lcs_dbf_##name,level, debug_buffer);\
} while (0)
/**
* some more definitions for debug or output stuff
*/
#define PRINTK_HEADER " lcs: "
/**
* sysfs related stuff
*/
#define CARD_FROM_DEV(cdev) \
(struct lcs_card *) \
((struct ccwgroup_device *)cdev->dev.driver_data)->dev.driver_data;
/**
* CCW commands used in this driver
*/
#define LCS_CCW_WRITE 0x01
#define LCS_CCW_READ 0x02
#define LCS_CCW_TRANSFER 0x08
/**
* LCS device status primitives
*/
#define LCS_CMD_STARTLAN 0x01
#define LCS_CMD_STOPLAN 0x02
#define LCS_CMD_LANSTAT 0x04
#define LCS_CMD_STARTUP 0x07
#define LCS_CMD_SHUTDOWN 0x08
#define LCS_CMD_QIPASSIST 0xb2
#define LCS_CMD_SETIPM 0xb4
#define LCS_CMD_DELIPM 0xb5
#define LCS_INITIATOR_TCPIP 0x00
#define LCS_INITIATOR_LGW 0x01
#define LCS_STD_CMD_SIZE 16
#define LCS_MULTICAST_CMD_SIZE 404
/**
* LCS IPASSIST MASKS,only used when multicast is switched on
*/
/* Not supported by LCS */
#define LCS_IPASS_ARP_PROCESSING 0x0001
#define LCS_IPASS_IN_CHECKSUM_SUPPORT 0x0002
#define LCS_IPASS_OUT_CHECKSUM_SUPPORT 0x0004
#define LCS_IPASS_IP_FRAG_REASSEMBLY 0x0008
#define LCS_IPASS_IP_FILTERING 0x0010
/* Supported by lcs 3172 */
#define LCS_IPASS_IPV6_SUPPORT 0x0020
#define LCS_IPASS_MULTICAST_SUPPORT 0x0040
/**
* LCS sense byte definitions
*/
#define LCS_SENSE_INTERFACE_DISCONNECT 0x01
#define LCS_SENSE_EQUIPMENT_CHECK 0x10
#define LCS_SENSE_BUS_OUT_CHECK 0x20
#define LCS_SENSE_INTERVENTION_REQUIRED 0x40
#define LCS_SENSE_CMD_REJECT 0x80
#define LCS_SENSE_RESETTING_EVENT 0x0080
#define LCS_SENSE_DEVICE_ONLINE 0x0020
/**
* LCS packet type definitions
*/
#define LCS_FRAME_TYPE_CONTROL 0
#define LCS_FRAME_TYPE_ENET 1
#define LCS_FRAME_TYPE_TR 2
#define LCS_FRAME_TYPE_FDDI 7
#define LCS_FRAME_TYPE_AUTO -1
/**
* some more definitions,we will sort them later
*/
#define LCS_ILLEGAL_OFFSET 0xffff
#define LCS_IOBUFFERSIZE 0x5000
#define LCS_NUM_BUFFS 32 /* needs to be power of 2 */
#define LCS_MAC_LENGTH 6
#define LCS_INVALID_PORT_NO -1
#define LCS_LANCMD_TIMEOUT_DEFAULT 5
/**
* Multicast state
*/
#define LCS_IPM_STATE_SET_REQUIRED 0
#define LCS_IPM_STATE_DEL_REQUIRED 1
#define LCS_IPM_STATE_ON_CARD 2
/**
* LCS IP Assist declarations
* seems to be only used for multicast
*/
#define LCS_IPASS_ARP_PROCESSING 0x0001
#define LCS_IPASS_INBOUND_CSUM_SUPP 0x0002
#define LCS_IPASS_OUTBOUND_CSUM_SUPP 0x0004
#define LCS_IPASS_IP_FRAG_REASSEMBLY 0x0008
#define LCS_IPASS_IP_FILTERING 0x0010
#define LCS_IPASS_IPV6_SUPPORT 0x0020
#define LCS_IPASS_MULTICAST_SUPPORT 0x0040
/**
* LCS Buffer states
*/
enum lcs_buffer_states {
BUF_STATE_EMPTY, /* buffer is empty */
BUF_STATE_LOCKED, /* buffer is locked, don't touch */
BUF_STATE_READY, /* buffer is ready for read/write */
BUF_STATE_PROCESSED,
};
/**
* LCS Channel State Machine declarations
*/
enum lcs_channel_states {
CH_STATE_INIT,
CH_STATE_HALTED,
CH_STATE_STOPPED,
CH_STATE_RUNNING,
CH_STATE_SUSPENDED,
CH_STATE_CLEARED,
};
/**
* LCS device state machine
*/
enum lcs_dev_states {
DEV_STATE_DOWN,
DEV_STATE_UP,
DEV_STATE_RECOVER,
};
enum lcs_threads {
LCS_SET_MC_THREAD = 1,
LCS_STARTLAN_THREAD = 2,
LCS_STOPLAN_THREAD = 4,
LCS_STARTUP_THREAD = 8,
};
/**
* LCS struct declarations
*/
struct lcs_header {
__u16 offset;
__u8 type;
__u8 slot;
} __attribute__ ((packed));
struct lcs_ip_mac_pair {
__u32 ip_addr;
__u8 mac_addr[LCS_MAC_LENGTH];
__u8 reserved[2];
} __attribute__ ((packed));
struct lcs_ipm_list {
struct list_head list;
struct lcs_ip_mac_pair ipm;
__u8 ipm_state;
};
struct lcs_cmd {
__u16 offset;
__u8 type;
__u8 slot;
__u8 cmd_code;
__u8 initiator;
__u16 sequence_no;
__u16 return_code;
union {
struct {
__u8 lan_type;
__u8 portno;
__u16 parameter_count;
__u8 operator_flags[3];
__u8 reserved[3];
} lcs_std_cmd;
struct {
__u16 unused1;
__u16 buff_size;
__u8 unused2[6];
} lcs_startup;
struct {
__u8 lan_type;
__u8 portno;
__u8 unused[10];
__u8 mac_addr[LCS_MAC_LENGTH];
__u32 num_packets_deblocked;
__u32 num_packets_blocked;
__u32 num_packets_tx_on_lan;
__u32 num_tx_errors_detected;
__u32 num_tx_packets_disgarded;
__u32 num_packets_rx_from_lan;
__u32 num_rx_errors_detected;
__u32 num_rx_discarded_nobuffs_avail;
__u32 num_rx_packets_too_large;
} lcs_lanstat_cmd;
#ifdef CONFIG_IP_MULTICAST
struct {
__u8 lan_type;
__u8 portno;
__u16 num_ip_pairs;
__u16 ip_assists_supported;
__u16 ip_assists_enabled;
__u16 version;
struct {
struct lcs_ip_mac_pair
ip_mac_pair[32];
__u32 response_data;
} lcs_ipass_ctlmsg __attribute ((packed));
} lcs_qipassist __attribute__ ((packed));
#endif /*CONFIG_IP_MULTICAST */
} cmd __attribute__ ((packed));
} __attribute__ ((packed));
/**
* Forward declarations.
*/
struct lcs_card;
struct lcs_channel;
/**
* Definition of an lcs buffer.
*/
struct lcs_buffer {
enum lcs_buffer_states state;
void *data;
int count;
/* Callback for completion notification. */
void (*callback)(struct lcs_channel *, struct lcs_buffer *);
};
struct lcs_reply {
struct list_head list;
__u16 sequence_no;
atomic_t refcnt;
/* Callback for completion notification. */
void (*callback)(struct lcs_card *, struct lcs_cmd *);
wait_queue_head_t wait_q;
struct lcs_card *card;
int received;
int rc;
};
/**
* Definition of an lcs channel
*/
struct lcs_channel {
enum lcs_channel_states state;
struct ccw_device *ccwdev;
struct ccw1 ccws[LCS_NUM_BUFFS + 1];
wait_queue_head_t wait_q;
struct tasklet_struct irq_tasklet;
struct lcs_buffer iob[LCS_NUM_BUFFS];
int io_idx;
int buf_idx;
};
/**
* definition of the lcs card
*/
struct lcs_card {
spinlock_t lock;
spinlock_t ipm_lock;
enum lcs_dev_states state;
struct net_device *dev;
struct net_device_stats stats;
unsigned short (*lan_type_trans)(struct sk_buff *skb,
struct net_device *dev);
struct lcs_channel read;
struct lcs_channel write;
struct lcs_buffer *tx_buffer;
int tx_emitted;
struct list_head lancmd_waiters;
int lancmd_timeout;
struct work_struct kernel_thread_starter;
spinlock_t mask_lock;
unsigned long thread_start_mask;
unsigned long thread_running_mask;
unsigned long thread_allowed_mask;
wait_queue_head_t wait_q;
#ifdef CONFIG_IP_MULTICAST
struct list_head ipm_list;
#endif
__u8 mac[LCS_MAC_LENGTH];
__u16 ip_assists_supported;
__u16 ip_assists_enabled;
__s8 lan_type;
__u32 pkt_seq;
__u16 sequence_no;
__s16 portno;
/* Some info copied from probeinfo */
u8 device_forced;
u8 max_port_no;
u8 hint_port_no;
s16 port_protocol_no;
} __attribute__ ((aligned(8)));
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