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