drivers/s390/net/lcs.h

   1 /*lcs.h*/
   2
   3 #include <linux/interrupt.h>
   4 #include <linux/netdevice.h>
   5 #include <linux/skbuff.h>
   6 #include <linux/workqueue.h>
   7 #include <asm/ccwdev.h>
   8
   9 #define LCS_DBF_TEXT(level, name, text) \
  10         do { \
  11                 debug_text_event(lcs_dbf_##name, level, text); \
  12         } while (0)
  13
  14 #define LCS_DBF_HEX(level,name,addr,len) \
  15 do { \
  16         debug_event(lcs_dbf_##name,level,(void*)(addr),len); \
  17 } while (0)
  18
  19 /* Allow to sort out low debug levels early to avoid wasted sprints */
  20 static inline int lcs_dbf_passes(debug_info_t *dbf_grp, int level)
  21 {
  22         return (level <= dbf_grp->level);
  23 }
  24
  25 #define LCS_DBF_TEXT_(level,name,text...) \
  26         do { \
  27                 if (lcs_dbf_passes(lcs_dbf_##name, level)) { \
  28                         sprintf(debug_buffer, text); \
  29                         debug_text_event(lcs_dbf_##name, level, debug_buffer); \
  30                 } \
  31         } while (0)
  32
  33 /**
  34  *      sysfs related stuff
  35  */
  36 #define CARD_FROM_DEV(cdev) \
  37         (struct lcs_card *) dev_get_drvdata( \
  38                 &((struct ccwgroup_device *)dev_get_drvdata(&cdev->dev))->dev);
  39
  40 /**
  41  * Enum for classifying detected devices.
  42  */
  43 enum lcs_channel_types {
  44         /* Device is not a channel  */
  45         lcs_channel_type_none,
  46
  47         /* Device is a 2216 channel */
  48         lcs_channel_type_parallel,
  49
  50         /* Device is a 2216 channel */
  51         lcs_channel_type_2216,
  52
  53         /* Device is a OSA2 card */
  54         lcs_channel_type_osa2
  55 };
  56
  57 /**
  58  * CCW commands used in this driver
  59  */
  60 #define LCS_CCW_WRITE           0x01
  61 #define LCS_CCW_READ            0x02
  62 #define LCS_CCW_TRANSFER        0x08
  63
  64 /**
  65  * LCS device status primitives
  66  */
  67 #define LCS_CMD_STARTLAN        0x01
  68 #define LCS_CMD_STOPLAN         0x02
  69 #define LCS_CMD_LANSTAT         0x04
  70 #define LCS_CMD_STARTUP         0x07
  71 #define LCS_CMD_SHUTDOWN        0x08
  72 #define LCS_CMD_QIPASSIST       0xb2
  73 #define LCS_CMD_SETIPM          0xb4
  74 #define LCS_CMD_DELIPM          0xb5
  75
  76 #define LCS_INITIATOR_TCPIP     0x00
  77 #define LCS_INITIATOR_LGW       0x01
  78 #define LCS_STD_CMD_SIZE        16
  79 #define LCS_MULTICAST_CMD_SIZE  404
  80
  81 /**
  82  * LCS IPASSIST MASKS,only used when multicast is switched on
  83  */
  84 /* Not supported by LCS */
  85 #define LCS_IPASS_ARP_PROCESSING        0x0001
  86 #define LCS_IPASS_IN_CHECKSUM_SUPPORT   0x0002
  87 #define LCS_IPASS_OUT_CHECKSUM_SUPPORT  0x0004
  88 #define LCS_IPASS_IP_FRAG_REASSEMBLY    0x0008
  89 #define LCS_IPASS_IP_FILTERING          0x0010
  90 /* Supported by lcs 3172 */
  91 #define LCS_IPASS_IPV6_SUPPORT          0x0020
  92 #define LCS_IPASS_MULTICAST_SUPPORT     0x0040
  93
  94 /**
  95  * LCS sense byte definitions
  96  */
  97 #define LCS_SENSE_BYTE_0                0
  98 #define LCS_SENSE_BYTE_1                1
  99 #define LCS_SENSE_BYTE_2                2
 100 #define LCS_SENSE_BYTE_3                3
 101 #define LCS_SENSE_INTERFACE_DISCONNECT  0x01
 102 #define LCS_SENSE_EQUIPMENT_CHECK       0x10
 103 #define LCS_SENSE_BUS_OUT_CHECK         0x20
 104 #define LCS_SENSE_INTERVENTION_REQUIRED 0x40
 105 #define LCS_SENSE_CMD_REJECT            0x80
 106 #define LCS_SENSE_RESETTING_EVENT       0x80
 107 #define LCS_SENSE_DEVICE_ONLINE         0x20
 108
 109 /**
 110  * LCS packet type definitions
 111  */
 112 #define LCS_FRAME_TYPE_CONTROL          0
 113 #define LCS_FRAME_TYPE_ENET             1
 114 #define LCS_FRAME_TYPE_TR               2
 115 #define LCS_FRAME_TYPE_FDDI             7
 116 #define LCS_FRAME_TYPE_AUTO             -1
 117
 118 /**
 119  * some more definitions,we will sort them later
 120  */
 121 #define LCS_ILLEGAL_OFFSET              0xffff
 122 #define LCS_IOBUFFERSIZE                0x5000
 123 #define LCS_NUM_BUFFS                   32      /* needs to be power of 2 */
 124 #define LCS_MAC_LENGTH                  6
 125 #define LCS_INVALID_PORT_NO             -1
 126 #define LCS_LANCMD_TIMEOUT_DEFAULT      5
 127
 128 /**
 129  * Multicast state
 130  */
 131 #define  LCS_IPM_STATE_SET_REQUIRED     0
 132 #define  LCS_IPM_STATE_DEL_REQUIRED     1
 133 #define  LCS_IPM_STATE_ON_CARD          2
 134
 135 /**
 136  * LCS IP Assist declarations
 137  * seems to be only used for multicast
 138  */
 139 #define  LCS_IPASS_ARP_PROCESSING       0x0001
 140 #define  LCS_IPASS_INBOUND_CSUM_SUPP    0x0002
 141 #define  LCS_IPASS_OUTBOUND_CSUM_SUPP   0x0004
 142 #define  LCS_IPASS_IP_FRAG_REASSEMBLY   0x0008
 143 #define  LCS_IPASS_IP_FILTERING         0x0010
 144 #define  LCS_IPASS_IPV6_SUPPORT         0x0020
 145 #define  LCS_IPASS_MULTICAST_SUPPORT    0x0040
 146
 147 /**
 148  * LCS Buffer states
 149  */
 150 enum lcs_buffer_states {
 151         LCS_BUF_STATE_EMPTY,    /* buffer is empty */
 152         LCS_BUF_STATE_LOCKED,   /* buffer is locked, don't touch */
 153         LCS_BUF_STATE_READY,    /* buffer is ready for read/write */
 154         LCS_BUF_STATE_PROCESSED,
 155 };
 156
 157 /**
 158  * LCS Channel State Machine declarations
 159  */
 160 enum lcs_channel_states {
 161         LCS_CH_STATE_INIT,
 162         LCS_CH_STATE_HALTED,
 163         LCS_CH_STATE_STOPPED,
 164         LCS_CH_STATE_RUNNING,
 165         LCS_CH_STATE_SUSPENDED,
 166         LCS_CH_STATE_CLEARED,
 167         LCS_CH_STATE_ERROR,
 168 };
 169
 170 /**
 171  * LCS device state machine
 172  */
 173 enum lcs_dev_states {
 174         DEV_STATE_DOWN,
 175         DEV_STATE_UP,
 176         DEV_STATE_RECOVER,
 177 };
 178
 179 enum lcs_threads {
 180         LCS_SET_MC_THREAD       = 1,
 181         LCS_RECOVERY_THREAD     = 2,
 182 };
 183
 184 /**
 185  * LCS struct declarations
 186  */
 187 struct lcs_header {
 188         __u16  offset;
 189         __u8   type;
 190         __u8   slot;
 191 }  __attribute__ ((packed));
 192
 193 struct lcs_ip_mac_pair {
 194         __be32  ip_addr;
 195         __u8   mac_addr[LCS_MAC_LENGTH];
 196         __u8   reserved[2];
 197 }  __attribute__ ((packed));
 198
 199 struct lcs_ipm_list {
 200         struct list_head list;
 201         struct lcs_ip_mac_pair ipm;
 202         __u8 ipm_state;
 203 };
 204
 205 struct lcs_cmd {
 206         __u16  offset;
 207         __u8   type;
 208         __u8   slot;
 209         __u8   cmd_code;
 210         __u8   initiator;
 211         __u16  sequence_no;
 212         __u16  return_code;
 213         union {
 214                 struct {
 215                         __u8   lan_type;
 216                         __u8   portno;
 217                         __u16  parameter_count;
 218                         __u8   operator_flags[3];
 219                         __u8   reserved[3];
 220                 } lcs_std_cmd;
 221                 struct {
 222                         __u16  unused1;
 223                         __u16  buff_size;
 224                         __u8   unused2[6];
 225                 } lcs_startup;
 226                 struct {
 227                         __u8   lan_type;
 228                         __u8   portno;
 229                         __u8   unused[10];
 230                         __u8   mac_addr[LCS_MAC_LENGTH];
 231                         __u32  num_packets_deblocked;
 232                         __u32  num_packets_blocked;
 233                         __u32  num_packets_tx_on_lan;
 234                         __u32  num_tx_errors_detected;
 235                         __u32  num_tx_packets_disgarded;
 236                         __u32  num_packets_rx_from_lan;
 237                         __u32  num_rx_errors_detected;
 238                         __u32  num_rx_discarded_nobuffs_avail;
 239                         __u32  num_rx_packets_too_large;
 240                 } lcs_lanstat_cmd;
 241 #ifdef CONFIG_IP_MULTICAST
 242                 struct {
 243                         __u8   lan_type;
 244                         __u8   portno;
 245                         __u16  num_ip_pairs;
 246                         __u16  ip_assists_supported;
 247                         __u16  ip_assists_enabled;
 248                         __u16  version;
 249                         struct {
 250                                 struct lcs_ip_mac_pair
 251                                 ip_mac_pair[32];
 252                                 __u32     response_data;
 253                         } lcs_ipass_ctlmsg __attribute ((packed));
 254                 } lcs_qipassist __attribute__ ((packed));
 255 #endif /*CONFIG_IP_MULTICAST */
 256         } cmd __attribute__ ((packed));
 257 }  __attribute__ ((packed));
 258
 259 /**
 260  * Forward declarations.
 261  */
 262 struct lcs_card;
 263 struct lcs_channel;
 264
 265 /**
 266  * Definition of an lcs buffer.
 267  */
 268 struct lcs_buffer {
 269         enum lcs_buffer_states state;
 270         void *data;
 271         int count;
 272         /* Callback for completion notification. */
 273         void (*callback)(struct lcs_channel *, struct lcs_buffer *);
 274 };
 275
 276 struct lcs_reply {
 277         struct list_head list;
 278         __u16 sequence_no;
 279         atomic_t refcnt;
 280         /* Callback for completion notification. */
 281         void (*callback)(struct lcs_card *, struct lcs_cmd *);
 282         wait_queue_head_t wait_q;
 283         struct lcs_card *card;
 284         int received;
 285         int rc;
 286 };
 287
 288 /**
 289  * Definition of an lcs channel
 290  */
 291 struct lcs_channel {
 292         enum lcs_channel_states state;
 293         struct ccw_device *ccwdev;
 294         struct ccw1 ccws[LCS_NUM_BUFFS + 1];
 295         wait_queue_head_t wait_q;
 296         struct tasklet_struct irq_tasklet;
 297         struct lcs_buffer iob[LCS_NUM_BUFFS];
 298         int io_idx;
 299         int buf_idx;
 300 };
 301
 302
 303 /**
 304  * definition of the lcs card
 305  */
 306 struct lcs_card {
 307         spinlock_t lock;
 308         spinlock_t ipm_lock;
 309         enum lcs_dev_states state;
 310         struct net_device *dev;
 311         struct net_device_stats stats;
 312         __be16 (*lan_type_trans)(struct sk_buff *skb,
 313                                          struct net_device *dev);
 314         struct ccwgroup_device *gdev;
 315         struct lcs_channel read;
 316         struct lcs_channel write;
 317         struct lcs_buffer *tx_buffer;
 318         int tx_emitted;
 319         struct list_head lancmd_waiters;
 320         int lancmd_timeout;
 321
 322         struct work_struct kernel_thread_starter;
 323         spinlock_t mask_lock;
 324         unsigned long thread_start_mask;
 325         unsigned long thread_running_mask;
 326         unsigned long thread_allowed_mask;
 327         wait_queue_head_t wait_q;
 328
 329 #ifdef CONFIG_IP_MULTICAST
 330         struct list_head ipm_list;
 331 #endif
 332         __u8 mac[LCS_MAC_LENGTH];
 333         __u16 ip_assists_supported;
 334         __u16 ip_assists_enabled;
 335         __s8 lan_type;
 336         __u32 pkt_seq;
 337         __u16 sequence_no;
 338         __s16 portno;
 339         /* Some info copied from probeinfo */
 340         u8 device_forced;
 341         u8 max_port_no;
 342         u8 hint_port_no;
 343         s16 port_protocol_no;
 344 }  __attribute__ ((aligned(8)));
 345