drivers/net/ehea/ehea.h

   1 /*
   2  *  linux/drivers/net/ehea/ehea.h
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #ifndef __EHEA_H__
  30 #define __EHEA_H__
  31
  32 #include <linux/module.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/if_vlan.h>
  36 #include <linux/inet_lro.h>
  37
  38 #include <asm/ibmebus.h>
  39 #include <asm/abs_addr.h>
  40 #include <asm/io.h>
  41
  42 #define DRV_NAME        "ehea"
  43 #define DRV_VERSION     "EHEA_0092"
  44
  45 /* eHEA capability flags */
  46 #define DLPAR_PORT_ADD_REM 1
  47 #define DLPAR_MEM_ADD      2
  48 #define DLPAR_MEM_REM      4
  49 #define EHEA_CAPABILITIES  (DLPAR_PORT_ADD_REM | DLPAR_MEM_ADD)
  50
  51 #define EHEA_MSG_DEFAULT (NETIF_MSG_LINK | NETIF_MSG_TIMER \
  52         | NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
  53
  54 #define EHEA_MAX_ENTRIES_RQ1 32767
  55 #define EHEA_MAX_ENTRIES_RQ2 16383
  56 #define EHEA_MAX_ENTRIES_RQ3 16383
  57 #define EHEA_MAX_ENTRIES_SQ  32767
  58 #define EHEA_MIN_ENTRIES_QP  127
  59
  60 #define EHEA_SMALL_QUEUES
  61 #define EHEA_NUM_TX_QP 1
  62 #define EHEA_LRO_MAX_AGGR 64
  63
  64 #ifdef EHEA_SMALL_QUEUES
  65 #define EHEA_MAX_CQE_COUNT      1023
  66 #define EHEA_DEF_ENTRIES_SQ     1023
  67 #define EHEA_DEF_ENTRIES_RQ1    4095
  68 #define EHEA_DEF_ENTRIES_RQ2    1023
  69 #define EHEA_DEF_ENTRIES_RQ3    1023
  70 #else
  71 #define EHEA_MAX_CQE_COUNT      4080
  72 #define EHEA_DEF_ENTRIES_SQ     4080
  73 #define EHEA_DEF_ENTRIES_RQ1    8160
  74 #define EHEA_DEF_ENTRIES_RQ2    2040
  75 #define EHEA_DEF_ENTRIES_RQ3    2040
  76 #endif
  77
  78 #define EHEA_MAX_ENTRIES_EQ 20
  79
  80 #define EHEA_SG_SQ  2
  81 #define EHEA_SG_RQ1 1
  82 #define EHEA_SG_RQ2 0
  83 #define EHEA_SG_RQ3 0
  84
  85 #define EHEA_MAX_PACKET_SIZE    9022    /* for jumbo frames */
  86 #define EHEA_RQ2_PKT_SIZE       1522
  87 #define EHEA_L_PKT_SIZE         256     /* low latency */
  88
  89 #define MAX_LRO_DESCRIPTORS 8
  90
  91 /* Send completion signaling */
  92
  93 /* Protection Domain Identifier */
  94 #define EHEA_PD_ID        0xaabcdeff
  95
  96 #define EHEA_RQ2_THRESHOLD         1
  97 #define EHEA_RQ3_THRESHOLD         9    /* use RQ3 threshold of 1522 bytes */
  98
  99 #define EHEA_SPEED_10G         10000
 100 #define EHEA_SPEED_1G           1000
 101 #define EHEA_SPEED_100M          100
 102 #define EHEA_SPEED_10M            10
 103 #define EHEA_SPEED_AUTONEG         0
 104
 105 /* Broadcast/Multicast registration types */
 106 #define EHEA_BCMC_SCOPE_ALL     0x08
 107 #define EHEA_BCMC_SCOPE_SINGLE  0x00
 108 #define EHEA_BCMC_MULTICAST     0x04
 109 #define EHEA_BCMC_BROADCAST     0x00
 110 #define EHEA_BCMC_UNTAGGED      0x02
 111 #define EHEA_BCMC_TAGGED        0x00
 112 #define EHEA_BCMC_VLANID_ALL    0x01
 113 #define EHEA_BCMC_VLANID_SINGLE 0x00
 114
 115 #define EHEA_CACHE_LINE          128
 116
 117 /* Memory Regions */
 118 #define EHEA_MR_ACC_CTRL       0x00800000
 119
 120 #define EHEA_BUSMAP_START      0x8000000000000000ULL
 121 #define EHEA_INVAL_ADDR        0xFFFFFFFFFFFFFFFFULL
 122 #define EHEA_DIR_INDEX_SHIFT 13                   /* 8k Entries in 64k block */
 123 #define EHEA_TOP_INDEX_SHIFT (EHEA_DIR_INDEX_SHIFT * 2)
 124 #define EHEA_MAP_ENTRIES (1 << EHEA_DIR_INDEX_SHIFT)
 125 #define EHEA_MAP_SIZE (0x10000)                   /* currently fixed map size */
 126 #define EHEA_INDEX_MASK (EHEA_MAP_ENTRIES - 1)
 127
 128
 129 #define EHEA_WATCH_DOG_TIMEOUT 10*HZ
 130
 131 /* utility functions */
 132
 133 #define ehea_info(fmt, args...) \
 134         printk(KERN_INFO DRV_NAME ": " fmt "\n", ## args)
 135
 136 #define ehea_error(fmt, args...) \
 137         printk(KERN_ERR DRV_NAME ": Error in %s: " fmt "\n", __func__, ## args)
 138
 139 #ifdef DEBUG
 140 #define ehea_debug(fmt, args...) \
 141         printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
 142 #else
 143 #define ehea_debug(fmt, args...) do {} while (0)
 144 #endif
 145
 146 void ehea_dump(void *adr, int len, char *msg);
 147
 148 #define EHEA_BMASK(pos, length) (((pos) << 16) + (length))
 149
 150 #define EHEA_BMASK_IBM(from, to) (((63 - to) << 16) + ((to) - (from) + 1))
 151
 152 #define EHEA_BMASK_SHIFTPOS(mask) (((mask) >> 16) & 0xffff)
 153
 154 #define EHEA_BMASK_MASK(mask) \
 155         (0xffffffffffffffffULL >> ((64 - (mask)) & 0xffff))
 156
 157 #define EHEA_BMASK_SET(mask, value) \
 158         ((EHEA_BMASK_MASK(mask) & ((u64)(value))) << EHEA_BMASK_SHIFTPOS(mask))
 159
 160 #define EHEA_BMASK_GET(mask, value) \
 161         (EHEA_BMASK_MASK(mask) & (((u64)(value)) >> EHEA_BMASK_SHIFTPOS(mask)))
 162
 163 /*
 164  * Generic ehea page
 165  */
 166 struct ehea_page {
 167         u8 entries[PAGE_SIZE];
 168 };
 169
 170 /*
 171  * Generic queue in linux kernel virtual memory
 172  */
 173 struct hw_queue {
 174         u64 current_q_offset;           /* current queue entry */
 175         struct ehea_page **queue_pages; /* array of pages belonging to queue */
 176         u32 qe_size;                    /* queue entry size */
 177         u32 queue_length;               /* queue length allocated in bytes */
 178         u32 pagesize;
 179         u32 toggle_state;               /* toggle flag - per page */
 180         u32 reserved;                   /* 64 bit alignment */
 181 };
 182
 183 /*
 184  * For pSeries this is a 64bit memory address where
 185  * I/O memory is mapped into CPU address space
 186  */
 187 struct h_epa {
 188         void __iomem *addr;
 189 };
 190
 191 struct h_epa_user {
 192         u64 addr;
 193 };
 194
 195 struct h_epas {
 196         struct h_epa kernel;    /* kernel space accessible resource,
 197                                    set to 0 if unused */
 198         struct h_epa_user user; /* user space accessible resource
 199                                    set to 0 if unused */
 200 };
 201
 202 /*
 203  * Memory map data structures
 204  */
 205 struct ehea_dir_bmap
 206 {
 207         u64 ent[EHEA_MAP_ENTRIES];
 208 };
 209 struct ehea_top_bmap
 210 {
 211         struct ehea_dir_bmap *dir[EHEA_MAP_ENTRIES];
 212 };
 213 struct ehea_bmap
 214 {
 215         struct ehea_top_bmap *top[EHEA_MAP_ENTRIES];
 216 };
 217
 218 struct ehea_qp;
 219 struct ehea_cq;
 220 struct ehea_eq;
 221 struct ehea_port;
 222 struct ehea_av;
 223
 224 /*
 225  * Queue attributes passed to ehea_create_qp()
 226  */
 227 struct ehea_qp_init_attr {
 228         /* input parameter */
 229         u32 qp_token;           /* queue token */
 230         u8 low_lat_rq1;
 231         u8 signalingtype;       /* cqe generation flag */
 232         u8 rq_count;            /* num of receive queues */
 233         u8 eqe_gen;             /* eqe generation flag */
 234         u16 max_nr_send_wqes;   /* max number of send wqes */
 235         u16 max_nr_rwqes_rq1;   /* max number of receive wqes */
 236         u16 max_nr_rwqes_rq2;
 237         u16 max_nr_rwqes_rq3;
 238         u8 wqe_size_enc_sq;
 239         u8 wqe_size_enc_rq1;
 240         u8 wqe_size_enc_rq2;
 241         u8 wqe_size_enc_rq3;
 242         u8 swqe_imm_data_len;   /* immediate data length for swqes */
 243         u16 port_nr;
 244         u16 rq2_threshold;
 245         u16 rq3_threshold;
 246         u64 send_cq_handle;
 247         u64 recv_cq_handle;
 248         u64 aff_eq_handle;
 249
 250         /* output parameter */
 251         u32 qp_nr;
 252         u16 act_nr_send_wqes;
 253         u16 act_nr_rwqes_rq1;
 254         u16 act_nr_rwqes_rq2;
 255         u16 act_nr_rwqes_rq3;
 256         u8 act_wqe_size_enc_sq;
 257         u8 act_wqe_size_enc_rq1;
 258         u8 act_wqe_size_enc_rq2;
 259         u8 act_wqe_size_enc_rq3;
 260         u32 nr_sq_pages;
 261         u32 nr_rq1_pages;
 262         u32 nr_rq2_pages;
 263         u32 nr_rq3_pages;
 264         u32 liobn_sq;
 265         u32 liobn_rq1;
 266         u32 liobn_rq2;
 267         u32 liobn_rq3;
 268 };
 269
 270 /*
 271  * Event Queue attributes, passed as paramter
 272  */
 273 struct ehea_eq_attr {
 274         u32 type;
 275         u32 max_nr_of_eqes;
 276         u8 eqe_gen;        /* generate eqe flag */
 277         u64 eq_handle;
 278         u32 act_nr_of_eqes;
 279         u32 nr_pages;
 280         u32 ist1;          /* Interrupt service token */
 281         u32 ist2;
 282         u32 ist3;
 283         u32 ist4;
 284 };
 285
 286
 287 /*
 288  * Event Queue
 289  */
 290 struct ehea_eq {
 291         struct ehea_adapter *adapter;
 292         struct hw_queue hw_queue;
 293         u64 fw_handle;
 294         struct h_epas epas;
 295         spinlock_t spinlock;
 296         struct ehea_eq_attr attr;
 297 };
 298
 299 /*
 300  * HEA Queues
 301  */
 302 struct ehea_qp {
 303         struct ehea_adapter *adapter;
 304         u64 fw_handle;                  /* QP handle for firmware calls */
 305         struct hw_queue hw_squeue;
 306         struct hw_queue hw_rqueue1;
 307         struct hw_queue hw_rqueue2;
 308         struct hw_queue hw_rqueue3;
 309         struct h_epas epas;
 310         struct ehea_qp_init_attr init_attr;
 311 };
 312
 313 /*
 314  * Completion Queue attributes
 315  */
 316 struct ehea_cq_attr {
 317         /* input parameter */
 318         u32 max_nr_of_cqes;
 319         u32 cq_token;
 320         u64 eq_handle;
 321
 322         /* output parameter */
 323         u32 act_nr_of_cqes;
 324         u32 nr_pages;
 325 };
 326
 327 /*
 328  * Completion Queue
 329  */
 330 struct ehea_cq {
 331         struct ehea_adapter *adapter;
 332         u64 fw_handle;
 333         struct hw_queue hw_queue;
 334         struct h_epas epas;
 335         struct ehea_cq_attr attr;
 336 };
 337
 338 /*
 339  * Memory Region
 340  */
 341 struct ehea_mr {
 342         struct ehea_adapter *adapter;
 343         u64 handle;
 344         u64 vaddr;
 345         u32 lkey;
 346 };
 347
 348 /*
 349  * Port state information
 350  */
 351 struct port_stats {
 352         int poll_receive_errors;
 353         int queue_stopped;
 354         int err_tcp_cksum;
 355         int err_ip_cksum;
 356         int err_frame_crc;
 357 };
 358
 359 #define EHEA_IRQ_NAME_SIZE 20
 360
 361 /*
 362  * Queue SKB Array
 363  */
 364 struct ehea_q_skb_arr {
 365         struct sk_buff **arr;           /* skb array for queue */
 366         int len;                        /* array length */
 367         int index;                      /* array index */
 368         int os_skbs;                    /* rq2/rq3 only: outstanding skbs */
 369 };
 370
 371 /*
 372  * Port resources
 373  */
 374 struct ehea_port_res {
 375         struct napi_struct napi;
 376         struct port_stats p_stats;
 377         struct ehea_mr send_mr;         /* send memory region */
 378         struct ehea_mr recv_mr;         /* receive memory region */
 379         spinlock_t xmit_lock;
 380         struct ehea_port *port;
 381         char int_recv_name[EHEA_IRQ_NAME_SIZE];
 382         char int_send_name[EHEA_IRQ_NAME_SIZE];
 383         struct ehea_qp *qp;
 384         struct ehea_cq *send_cq;
 385         struct ehea_cq *recv_cq;
 386         struct ehea_eq *eq;
 387         struct ehea_q_skb_arr rq1_skba;
 388         struct ehea_q_skb_arr rq2_skba;
 389         struct ehea_q_skb_arr rq3_skba;
 390         struct ehea_q_skb_arr sq_skba;
 391         int sq_skba_size;
 392         spinlock_t netif_queue;
 393         int queue_stopped;
 394         int swqe_refill_th;
 395         atomic_t swqe_avail;
 396         int swqe_ll_count;
 397         u32 swqe_id_counter;
 398         u64 tx_packets;
 399         u64 rx_packets;
 400         u32 poll_counter;
 401         struct net_lro_mgr lro_mgr;
 402         struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
 403 };
 404
 405
 406 #define EHEA_MAX_PORTS 16
 407
 408 #define EHEA_NUM_PORTRES_FW_HANDLES    6  /* QP handle, SendCQ handle,
 409                                              RecvCQ handle, EQ handle,
 410                                              SendMR handle, RecvMR handle */
 411 #define EHEA_NUM_PORT_FW_HANDLES       1  /* EQ handle */
 412 #define EHEA_NUM_ADAPTER_FW_HANDLES    2  /* MR handle, NEQ handle */
 413
 414 struct ehea_adapter {
 415         u64 handle;
 416         struct of_device *ofdev;
 417         struct ehea_port *port[EHEA_MAX_PORTS];
 418         struct ehea_eq *neq;       /* notification event queue */
 419         struct tasklet_struct neq_tasklet;
 420         struct ehea_mr mr;
 421         u32 pd;                    /* protection domain */
 422         u64 max_mc_mac;            /* max number of multicast mac addresses */
 423         int active_ports;
 424         struct list_head list;
 425 };
 426
 427
 428 struct ehea_mc_list {
 429         struct list_head list;
 430         u64 macaddr;
 431 };
 432
 433 /* kdump support */
 434 struct ehea_fw_handle_entry {
 435         u64 adh;               /* Adapter Handle */
 436         u64 fwh;               /* Firmware Handle */
 437 };
 438
 439 struct ehea_fw_handle_array {
 440         struct ehea_fw_handle_entry *arr;
 441         int num_entries;
 442         struct mutex lock;
 443 };
 444
 445 struct ehea_bcmc_reg_entry {
 446         u64 adh;               /* Adapter Handle */
 447         u32 port_id;           /* Logical Port Id */
 448         u8 reg_type;           /* Registration Type */
 449         u64 macaddr;
 450 };
 451
 452 struct ehea_bcmc_reg_array {
 453         struct ehea_bcmc_reg_entry *arr;
 454         int num_entries;
 455         spinlock_t lock;
 456 };
 457
 458 #define EHEA_PORT_UP 1
 459 #define EHEA_PORT_DOWN 0
 460 #define EHEA_PHY_LINK_UP 1
 461 #define EHEA_PHY_LINK_DOWN 0
 462 #define EHEA_MAX_PORT_RES 16
 463 struct ehea_port {
 464         struct ehea_adapter *adapter;    /* adapter that owns this port */
 465         struct net_device *netdev;
 466         struct net_device_stats stats;
 467         struct ehea_port_res port_res[EHEA_MAX_PORT_RES];
 468         struct of_device  ofdev; /* Open Firmware Device */
 469         struct ehea_mc_list *mc_list;    /* Multicast MAC addresses */
 470         struct vlan_group *vgrp;
 471         struct ehea_eq *qp_eq;
 472         struct work_struct reset_task;
 473         struct mutex port_lock;
 474         char int_aff_name[EHEA_IRQ_NAME_SIZE];
 475         int allmulti;                    /* Indicates IFF_ALLMULTI state */
 476         int promisc;                     /* Indicates IFF_PROMISC state */
 477         int num_tx_qps;
 478         int num_add_tx_qps;
 479         int num_mcs;
 480         int resets;
 481         u64 flags;
 482         u64 mac_addr;
 483         u32 logical_port_id;
 484         u32 port_speed;
 485         u32 msg_enable;
 486         u32 sig_comp_iv;
 487         u32 state;
 488         u32 lro_max_aggr;
 489         u8 phy_link;
 490         u8 full_duplex;
 491         u8 autoneg;
 492         u8 num_def_qps;
 493 };
 494
 495 struct port_res_cfg {
 496         int max_entries_rcq;
 497         int max_entries_scq;
 498         int max_entries_sq;
 499         int max_entries_rq1;
 500         int max_entries_rq2;
 501         int max_entries_rq3;
 502 };
 503
 504 enum ehea_flag_bits {
 505         __EHEA_STOP_XFER,
 506         __EHEA_DISABLE_PORT_RESET
 507 };
 508
 509 void ehea_set_ethtool_ops(struct net_device *netdev);
 510 int ehea_sense_port_attr(struct ehea_port *port);
 511 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed);
 512
 513 extern u64 ehea_driver_flags;
 514 extern struct work_struct ehea_rereg_mr_task;
 515
 516 #endif  /* __EHEA_H__ */