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
  37 #include <asm/ibmebus.h>
  38 #include <asm/abs_addr.h>
  39 #include <asm/io.h>
  40
  41 #define DRV_NAME        "ehea"
  42 #define DRV_VERSION     "EHEA_0045"
  43
  44 #define EHEA_MSG_DEFAULT (NETIF_MSG_LINK | NETIF_MSG_TIMER \
  45         | NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
  46
  47 #define EHEA_MAX_ENTRIES_RQ1 32767
  48 #define EHEA_MAX_ENTRIES_RQ2 16383
  49 #define EHEA_MAX_ENTRIES_RQ3 16383
  50 #define EHEA_MAX_ENTRIES_SQ  32767
  51 #define EHEA_MIN_ENTRIES_QP  127
  52
  53 #define EHEA_SMALL_QUEUES
  54 #define EHEA_NUM_TX_QP 1
  55
  56 #ifdef EHEA_SMALL_QUEUES
  57 #define EHEA_MAX_CQE_COUNT      1023
  58 #define EHEA_DEF_ENTRIES_SQ     1023
  59 #define EHEA_DEF_ENTRIES_RQ1    4095
  60 #define EHEA_DEF_ENTRIES_RQ2    1023
  61 #define EHEA_DEF_ENTRIES_RQ3    1023
  62 #else
  63 #define EHEA_MAX_CQE_COUNT      4080
  64 #define EHEA_DEF_ENTRIES_SQ     4080
  65 #define EHEA_DEF_ENTRIES_RQ1    8160
  66 #define EHEA_DEF_ENTRIES_RQ2    2040
  67 #define EHEA_DEF_ENTRIES_RQ3    2040
  68 #endif
  69
  70 #define EHEA_MAX_ENTRIES_EQ 20
  71
  72 #define EHEA_SG_SQ  2
  73 #define EHEA_SG_RQ1 1
  74 #define EHEA_SG_RQ2 0
  75 #define EHEA_SG_RQ3 0
  76
  77 #define EHEA_MAX_PACKET_SIZE    9022    /* for jumbo frames */
  78 #define EHEA_RQ2_PKT_SIZE       1522
  79 #define EHEA_L_PKT_SIZE         256     /* low latency */
  80
  81 #define EHEA_POLL_MAX_RWQE      1000
  82
  83 /* Send completion signaling */
  84 #define EHEA_SIG_IV_LONG           1
  85
  86 /* Protection Domain Identifier */
  87 #define EHEA_PD_ID        0xaabcdeff
  88
  89 #define EHEA_RQ2_THRESHOLD         1
  90 #define EHEA_RQ3_THRESHOLD         9    /* use RQ3 threshold of 1522 bytes */
  91
  92 #define EHEA_SPEED_10G         10000
  93 #define EHEA_SPEED_1G           1000
  94 #define EHEA_SPEED_100M          100
  95 #define EHEA_SPEED_10M            10
  96 #define EHEA_SPEED_AUTONEG         0
  97
  98 /* Broadcast/Multicast registration types */
  99 #define EHEA_BCMC_SCOPE_ALL     0x08
 100 #define EHEA_BCMC_SCOPE_SINGLE  0x00
 101 #define EHEA_BCMC_MULTICAST     0x04
 102 #define EHEA_BCMC_BROADCAST     0x00
 103 #define EHEA_BCMC_UNTAGGED      0x02
 104 #define EHEA_BCMC_TAGGED        0x00
 105 #define EHEA_BCMC_VLANID_ALL    0x01
 106 #define EHEA_BCMC_VLANID_SINGLE 0x00
 107
 108 #define EHEA_CACHE_LINE          128
 109
 110 /* Memory Regions */
 111 #define EHEA_MR_MAX_TX_PAGES   20
 112 #define EHEA_MR_TX_DATA_PN      3
 113 #define EHEA_MR_ACC_CTRL       0x00800000
 114 #define EHEA_RWQES_PER_MR_RQ2  10
 115 #define EHEA_RWQES_PER_MR_RQ3  10
 116
 117 #define EHEA_WATCH_DOG_TIMEOUT 10*HZ
 118
 119 /* utility functions */
 120
 121 #define ehea_info(fmt, args...) \
 122         printk(KERN_INFO DRV_NAME ": " fmt "\n", ## args)
 123
 124 #define ehea_error(fmt, args...) \
 125         printk(KERN_ERR DRV_NAME ": Error in %s: " fmt "\n", __func__, ## args)
 126
 127 #ifdef DEBUG
 128 #define ehea_debug(fmt, args...) \
 129         printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
 130 #else
 131 #define ehea_debug(fmt, args...) do {} while (0)
 132 #endif
 133
 134 void ehea_dump(void *adr, int len, char *msg);
 135
 136 #define EHEA_BMASK(pos, length) (((pos) << 16) + (length))
 137
 138 #define EHEA_BMASK_IBM(from, to) (((63 - to) << 16) + ((to) - (from) + 1))
 139
 140 #define EHEA_BMASK_SHIFTPOS(mask) (((mask) >> 16) & 0xffff)
 141
 142 #define EHEA_BMASK_MASK(mask) \
 143         (0xffffffffffffffffULL >> ((64 - (mask)) & 0xffff))
 144
 145 #define EHEA_BMASK_SET(mask, value) \
 146         ((EHEA_BMASK_MASK(mask) & ((u64)(value))) << EHEA_BMASK_SHIFTPOS(mask))
 147
 148 #define EHEA_BMASK_GET(mask, value) \
 149         (EHEA_BMASK_MASK(mask) & (((u64)(value)) >> EHEA_BMASK_SHIFTPOS(mask)))
 150
 151 /*
 152  * Generic ehea page
 153  */
 154 struct ehea_page {
 155         u8 entries[PAGE_SIZE];
 156 };
 157
 158 /*
 159  * Generic queue in linux kernel virtual memory
 160  */
 161 struct hw_queue {
 162         u64 current_q_offset;           /* current queue entry */
 163         struct ehea_page **queue_pages; /* array of pages belonging to queue */
 164         u32 qe_size;                    /* queue entry size */
 165         u32 queue_length;               /* queue length allocated in bytes */
 166         u32 pagesize;
 167         u32 toggle_state;               /* toggle flag - per page */
 168         u32 reserved;                   /* 64 bit alignment */
 169 };
 170
 171 /*
 172  * For pSeries this is a 64bit memory address where
 173  * I/O memory is mapped into CPU address space
 174  */
 175 struct h_epa {
 176         void __iomem *addr;
 177 };
 178
 179 struct h_epa_user {
 180         u64 addr;
 181 };
 182
 183 struct h_epas {
 184         struct h_epa kernel;    /* kernel space accessible resource,
 185                                    set to 0 if unused */
 186         struct h_epa_user user; /* user space accessible resource
 187                                    set to 0 if unused */
 188 };
 189
 190 struct ehea_qp;
 191 struct ehea_cq;
 192 struct ehea_eq;
 193 struct ehea_port;
 194 struct ehea_av;
 195
 196 /*
 197  * Queue attributes passed to ehea_create_qp()
 198  */
 199 struct ehea_qp_init_attr {
 200         /* input parameter */
 201         u32 qp_token;           /* queue token */
 202         u8 low_lat_rq1;
 203         u8 signalingtype;       /* cqe generation flag */
 204         u8 rq_count;            /* num of receive queues */
 205         u8 eqe_gen;             /* eqe generation flag */
 206         u16 max_nr_send_wqes;   /* max number of send wqes */
 207         u16 max_nr_rwqes_rq1;   /* max number of receive wqes */
 208         u16 max_nr_rwqes_rq2;
 209         u16 max_nr_rwqes_rq3;
 210         u8 wqe_size_enc_sq;
 211         u8 wqe_size_enc_rq1;
 212         u8 wqe_size_enc_rq2;
 213         u8 wqe_size_enc_rq3;
 214         u8 swqe_imm_data_len;   /* immediate data length for swqes */
 215         u16 port_nr;
 216         u16 rq2_threshold;
 217         u16 rq3_threshold;
 218         u64 send_cq_handle;
 219         u64 recv_cq_handle;
 220         u64 aff_eq_handle;
 221
 222         /* output parameter */
 223         u32 qp_nr;
 224         u16 act_nr_send_wqes;
 225         u16 act_nr_rwqes_rq1;
 226         u16 act_nr_rwqes_rq2;
 227         u16 act_nr_rwqes_rq3;
 228         u8 act_wqe_size_enc_sq;
 229         u8 act_wqe_size_enc_rq1;
 230         u8 act_wqe_size_enc_rq2;
 231         u8 act_wqe_size_enc_rq3;
 232         u32 nr_sq_pages;
 233         u32 nr_rq1_pages;
 234         u32 nr_rq2_pages;
 235         u32 nr_rq3_pages;
 236         u32 liobn_sq;
 237         u32 liobn_rq1;
 238         u32 liobn_rq2;
 239         u32 liobn_rq3;
 240 };
 241
 242 /*
 243  * Event Queue attributes, passed as paramter
 244  */
 245 struct ehea_eq_attr {
 246         u32 type;
 247         u32 max_nr_of_eqes;
 248         u8 eqe_gen;        /* generate eqe flag */
 249         u64 eq_handle;
 250         u32 act_nr_of_eqes;
 251         u32 nr_pages;
 252         u32 ist1;          /* Interrupt service token */
 253         u32 ist2;
 254         u32 ist3;
 255         u32 ist4;
 256 };
 257
 258
 259 /*
 260  * Event Queue
 261  */
 262 struct ehea_eq {
 263         struct ehea_adapter *adapter;
 264         struct hw_queue hw_queue;
 265         u64 fw_handle;
 266         struct h_epas epas;
 267         spinlock_t spinlock;
 268         struct ehea_eq_attr attr;
 269 };
 270
 271 /*
 272  * HEA Queues
 273  */
 274 struct ehea_qp {
 275         struct ehea_adapter *adapter;
 276         u64 fw_handle;                  /* QP handle for firmware calls */
 277         struct hw_queue hw_squeue;
 278         struct hw_queue hw_rqueue1;
 279         struct hw_queue hw_rqueue2;
 280         struct hw_queue hw_rqueue3;
 281         struct h_epas epas;
 282         struct ehea_qp_init_attr init_attr;
 283 };
 284
 285 /*
 286  * Completion Queue attributes
 287  */
 288 struct ehea_cq_attr {
 289         /* input parameter */
 290         u32 max_nr_of_cqes;
 291         u32 cq_token;
 292         u64 eq_handle;
 293
 294         /* output parameter */
 295         u32 act_nr_of_cqes;
 296         u32 nr_pages;
 297 };
 298
 299 /*
 300  * Completion Queue
 301  */
 302 struct ehea_cq {
 303         struct ehea_adapter *adapter;
 304         u64 fw_handle;
 305         struct hw_queue hw_queue;
 306         struct h_epas epas;
 307         struct ehea_cq_attr attr;
 308 };
 309
 310 /*
 311  * Memory Region
 312  */
 313 struct ehea_mr {
 314         u64 handle;
 315         u64 vaddr;
 316         u32 lkey;
 317 };
 318
 319 /*
 320  * Port state information
 321  */
 322 struct port_state {
 323         int poll_max_processed;
 324         int poll_receive_errors;
 325         int ehea_poll;
 326         int queue_stopped;
 327         int min_swqe_avail;
 328         u64 sqc_stop_sum;
 329         int pkt_send;
 330         int pkt_xmit;
 331         int send_tasklet;
 332         int nwqe;
 333 };
 334
 335 #define EHEA_IRQ_NAME_SIZE 20
 336
 337 /*
 338  * Queue SKB Array
 339  */
 340 struct ehea_q_skb_arr {
 341         struct sk_buff **arr;           /* skb array for queue */
 342         int len;                        /* array length */
 343         int index;                      /* array index */
 344         int os_skbs;                    /* rq2/rq3 only: outstanding skbs */
 345 };
 346
 347 /*
 348  * Port resources
 349  */
 350 struct ehea_port_res {
 351         struct ehea_mr send_mr;         /* send memory region */
 352         struct ehea_mr recv_mr;         /* receive memory region */
 353         spinlock_t xmit_lock;
 354         struct ehea_port *port;
 355         char int_recv_name[EHEA_IRQ_NAME_SIZE];
 356         char int_send_name[EHEA_IRQ_NAME_SIZE];
 357         struct ehea_qp *qp;
 358         struct ehea_cq *send_cq;
 359         struct ehea_cq *recv_cq;
 360         struct ehea_eq *send_eq;
 361         struct ehea_eq *recv_eq;
 362         spinlock_t send_lock;
 363         struct ehea_q_skb_arr rq1_skba;
 364         struct ehea_q_skb_arr rq2_skba;
 365         struct ehea_q_skb_arr rq3_skba;
 366         struct ehea_q_skb_arr sq_skba;
 367         spinlock_t netif_queue;
 368         int queue_stopped;
 369         int swqe_refill_th;
 370         atomic_t swqe_avail;
 371         int swqe_ll_count;
 372         int swqe_count;
 373         u32 swqe_id_counter;
 374         u64 tx_packets;
 375         struct tasklet_struct send_comp_task;
 376         spinlock_t recv_lock;
 377         struct port_state p_state;
 378         u64 rx_packets;
 379         u32 poll_counter;
 380 };
 381
 382
 383 struct ehea_adapter {
 384         u64 handle;
 385         u8 num_ports;
 386         struct ehea_port *port[16];
 387         struct ehea_eq *neq;       /* notification event queue */
 388         struct workqueue_struct *ehea_wq;
 389         struct tasklet_struct neq_tasklet;
 390         struct ehea_mr mr;
 391         u32 pd;                    /* protection domain */
 392         u64 max_mc_mac;            /* max number of multicast mac addresses */
 393 };
 394
 395
 396 struct ehea_mc_list {
 397         struct list_head list;
 398         u64 macaddr;
 399 };
 400
 401 #define EHEA_PORT_UP 1
 402 #define EHEA_PORT_DOWN 0
 403 #define EHEA_MAX_PORT_RES 16
 404 struct ehea_port {
 405         struct ehea_adapter *adapter;    /* adapter that owns this port */
 406         struct net_device *netdev;
 407         struct net_device_stats stats;
 408         struct ehea_port_res port_res[EHEA_MAX_PORT_RES];
 409         struct device_node *of_dev_node; /* Open Firmware Device Node */
 410         struct ehea_mc_list *mc_list;    /* Multicast MAC addresses */
 411         struct vlan_group *vgrp;
 412         struct ehea_eq *qp_eq;
 413         struct work_struct reset_task;
 414         struct semaphore port_lock;
 415         char int_aff_name[EHEA_IRQ_NAME_SIZE];
 416         int allmulti;                    /* Indicates IFF_ALLMULTI state */
 417         int promisc;                     /* Indicates IFF_PROMISC state */
 418         int num_add_tx_qps;
 419         int resets;
 420         u64 mac_addr;
 421         u32 logical_port_id;
 422         u32 port_speed;
 423         u32 msg_enable;
 424         u32 sig_comp_iv;
 425         u32 state;
 426         u8 full_duplex;
 427         u8 autoneg;
 428         u8 num_def_qps;
 429 };
 430
 431 struct port_res_cfg {
 432         int max_entries_rcq;
 433         int max_entries_scq;
 434         int max_entries_sq;
 435         int max_entries_rq1;
 436         int max_entries_rq2;
 437         int max_entries_rq3;
 438 };
 439
 440
 441 void ehea_set_ethtool_ops(struct net_device *netdev);
 442 int ehea_sense_port_attr(struct ehea_port *port);
 443 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed);
 444
 445 #endif  /* __EHEA_H__ */