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_0074"
  43
  44 /* eHEA capability flags */
  45 #define DLPAR_PORT_ADD_REM 1
  46 #define DLPAR_MEM_ADD      2
  47 #define DLPAR_MEM_REM      4
  48 #define EHEA_CAPABILITIES  (DLPAR_PORT_ADD_REM)
  49
  50 #define EHEA_MSG_DEFAULT (NETIF_MSG_LINK | NETIF_MSG_TIMER \
  51         | NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
  52
  53 #define EHEA_MAX_ENTRIES_RQ1 32767
  54 #define EHEA_MAX_ENTRIES_RQ2 16383
  55 #define EHEA_MAX_ENTRIES_RQ3 16383
  56 #define EHEA_MAX_ENTRIES_SQ  32767
  57 #define EHEA_MIN_ENTRIES_QP  127
  58
  59 #define EHEA_SMALL_QUEUES
  60 #define EHEA_NUM_TX_QP 1
  61
  62 #ifdef EHEA_SMALL_QUEUES
  63 #define EHEA_MAX_CQE_COUNT      1023
  64 #define EHEA_DEF_ENTRIES_SQ     1023
  65 #define EHEA_DEF_ENTRIES_RQ1    4095
  66 #define EHEA_DEF_ENTRIES_RQ2    1023
  67 #define EHEA_DEF_ENTRIES_RQ3    1023
  68 #else
  69 #define EHEA_MAX_CQE_COUNT      4080
  70 #define EHEA_DEF_ENTRIES_SQ     4080
  71 #define EHEA_DEF_ENTRIES_RQ1    8160
  72 #define EHEA_DEF_ENTRIES_RQ2    2040
  73 #define EHEA_DEF_ENTRIES_RQ3    2040
  74 #endif
  75
  76 #define EHEA_MAX_ENTRIES_EQ 20
  77
  78 #define EHEA_SG_SQ  2
  79 #define EHEA_SG_RQ1 1
  80 #define EHEA_SG_RQ2 0
  81 #define EHEA_SG_RQ3 0
  82
  83 #define EHEA_MAX_PACKET_SIZE    9022    /* for jumbo frames */
  84 #define EHEA_RQ2_PKT_SIZE       1522
  85 #define EHEA_L_PKT_SIZE         256     /* low latency */
  86
  87 /* Send completion signaling */
  88
  89 /* Protection Domain Identifier */
  90 #define EHEA_PD_ID        0xaabcdeff
  91
  92 #define EHEA_RQ2_THRESHOLD         1
  93 #define EHEA_RQ3_THRESHOLD         9    /* use RQ3 threshold of 1522 bytes */
  94
  95 #define EHEA_SPEED_10G         10000
  96 #define EHEA_SPEED_1G           1000
  97 #define EHEA_SPEED_100M          100
  98 #define EHEA_SPEED_10M            10
  99 #define EHEA_SPEED_AUTONEG         0
 100
 101 /* Broadcast/Multicast registration types */
 102 #define EHEA_BCMC_SCOPE_ALL     0x08
 103 #define EHEA_BCMC_SCOPE_SINGLE  0x00
 104 #define EHEA_BCMC_MULTICAST     0x04
 105 #define EHEA_BCMC_BROADCAST     0x00
 106 #define EHEA_BCMC_UNTAGGED      0x02
 107 #define EHEA_BCMC_TAGGED        0x00
 108 #define EHEA_BCMC_VLANID_ALL    0x01
 109 #define EHEA_BCMC_VLANID_SINGLE 0x00
 110
 111 #define EHEA_CACHE_LINE          128
 112
 113 /* Memory Regions */
 114 #define EHEA_MR_ACC_CTRL       0x00800000
 115
 116 #define EHEA_BUSMAP_START      0x8000000000000000ULL
 117
 118 #define EHEA_WATCH_DOG_TIMEOUT 10*HZ
 119
 120 /* utility functions */
 121
 122 #define ehea_info(fmt, args...) \
 123         printk(KERN_INFO DRV_NAME ": " fmt "\n", ## args)
 124
 125 #define ehea_error(fmt, args...) \
 126         printk(KERN_ERR DRV_NAME ": Error in %s: " fmt "\n", __func__, ## args)
 127
 128 #ifdef DEBUG
 129 #define ehea_debug(fmt, args...) \
 130         printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
 131 #else
 132 #define ehea_debug(fmt, args...) do {} while (0)
 133 #endif
 134
 135 void ehea_dump(void *adr, int len, char *msg);
 136
 137 #define EHEA_BMASK(pos, length) (((pos) << 16) + (length))
 138
 139 #define EHEA_BMASK_IBM(from, to) (((63 - to) << 16) + ((to) - (from) + 1))
 140
 141 #define EHEA_BMASK_SHIFTPOS(mask) (((mask) >> 16) & 0xffff)
 142
 143 #define EHEA_BMASK_MASK(mask) \
 144         (0xffffffffffffffffULL >> ((64 - (mask)) & 0xffff))
 145
 146 #define EHEA_BMASK_SET(mask, value) \
 147         ((EHEA_BMASK_MASK(mask) & ((u64)(value))) << EHEA_BMASK_SHIFTPOS(mask))
 148
 149 #define EHEA_BMASK_GET(mask, value) \
 150         (EHEA_BMASK_MASK(mask) & (((u64)(value)) >> EHEA_BMASK_SHIFTPOS(mask)))
 151
 152 /*
 153  * Generic ehea page
 154  */
 155 struct ehea_page {
 156         u8 entries[PAGE_SIZE];
 157 };
 158
 159 /*
 160  * Generic queue in linux kernel virtual memory
 161  */
 162 struct hw_queue {
 163         u64 current_q_offset;           /* current queue entry */
 164         struct ehea_page **queue_pages; /* array of pages belonging to queue */
 165         u32 qe_size;                    /* queue entry size */
 166         u32 queue_length;               /* queue length allocated in bytes */
 167         u32 pagesize;
 168         u32 toggle_state;               /* toggle flag - per page */
 169         u32 reserved;                   /* 64 bit alignment */
 170 };
 171
 172 /*
 173  * For pSeries this is a 64bit memory address where
 174  * I/O memory is mapped into CPU address space
 175  */
 176 struct h_epa {
 177         void __iomem *addr;
 178 };
 179
 180 struct h_epa_user {
 181         u64 addr;
 182 };
 183
 184 struct h_epas {
 185         struct h_epa kernel;    /* kernel space accessible resource,
 186                                    set to 0 if unused */
 187         struct h_epa_user user; /* user space accessible resource
 188                                    set to 0 if unused */
 189 };
 190
 191 struct ehea_busmap {
 192         unsigned int entries;           /* total number of entries */
 193         unsigned int valid_sections;    /* number of valid sections */
 194         u64 *vaddr;
 195 };
 196
 197 struct ehea_qp;
 198 struct ehea_cq;
 199 struct ehea_eq;
 200 struct ehea_port;
 201 struct ehea_av;
 202
 203 /*
 204  * Queue attributes passed to ehea_create_qp()
 205  */
 206 struct ehea_qp_init_attr {
 207         /* input parameter */
 208         u32 qp_token;           /* queue token */
 209         u8 low_lat_rq1;
 210         u8 signalingtype;       /* cqe generation flag */
 211         u8 rq_count;            /* num of receive queues */
 212         u8 eqe_gen;             /* eqe generation flag */
 213         u16 max_nr_send_wqes;   /* max number of send wqes */
 214         u16 max_nr_rwqes_rq1;   /* max number of receive wqes */
 215         u16 max_nr_rwqes_rq2;
 216         u16 max_nr_rwqes_rq3;
 217         u8 wqe_size_enc_sq;
 218         u8 wqe_size_enc_rq1;
 219         u8 wqe_size_enc_rq2;
 220         u8 wqe_size_enc_rq3;
 221         u8 swqe_imm_data_len;   /* immediate data length for swqes */
 222         u16 port_nr;
 223         u16 rq2_threshold;
 224         u16 rq3_threshold;
 225         u64 send_cq_handle;
 226         u64 recv_cq_handle;
 227         u64 aff_eq_handle;
 228
 229         /* output parameter */
 230         u32 qp_nr;
 231         u16 act_nr_send_wqes;
 232         u16 act_nr_rwqes_rq1;
 233         u16 act_nr_rwqes_rq2;
 234         u16 act_nr_rwqes_rq3;
 235         u8 act_wqe_size_enc_sq;
 236         u8 act_wqe_size_enc_rq1;
 237         u8 act_wqe_size_enc_rq2;
 238         u8 act_wqe_size_enc_rq3;
 239         u32 nr_sq_pages;
 240         u32 nr_rq1_pages;
 241         u32 nr_rq2_pages;
 242         u32 nr_rq3_pages;
 243         u32 liobn_sq;
 244         u32 liobn_rq1;
 245         u32 liobn_rq2;
 246         u32 liobn_rq3;
 247 };
 248
 249 /*
 250  * Event Queue attributes, passed as paramter
 251  */
 252 struct ehea_eq_attr {
 253         u32 type;
 254         u32 max_nr_of_eqes;
 255         u8 eqe_gen;        /* generate eqe flag */
 256         u64 eq_handle;
 257         u32 act_nr_of_eqes;
 258         u32 nr_pages;
 259         u32 ist1;          /* Interrupt service token */
 260         u32 ist2;
 261         u32 ist3;
 262         u32 ist4;
 263 };
 264
 265
 266 /*
 267  * Event Queue
 268  */
 269 struct ehea_eq {
 270         struct ehea_adapter *adapter;
 271         struct hw_queue hw_queue;
 272         u64 fw_handle;
 273         struct h_epas epas;
 274         spinlock_t spinlock;
 275         struct ehea_eq_attr attr;
 276 };
 277
 278 /*
 279  * HEA Queues
 280  */
 281 struct ehea_qp {
 282         struct ehea_adapter *adapter;
 283         u64 fw_handle;                  /* QP handle for firmware calls */
 284         struct hw_queue hw_squeue;
 285         struct hw_queue hw_rqueue1;
 286         struct hw_queue hw_rqueue2;
 287         struct hw_queue hw_rqueue3;
 288         struct h_epas epas;
 289         struct ehea_qp_init_attr init_attr;
 290 };
 291
 292 /*
 293  * Completion Queue attributes
 294  */
 295 struct ehea_cq_attr {
 296         /* input parameter */
 297         u32 max_nr_of_cqes;
 298         u32 cq_token;
 299         u64 eq_handle;
 300
 301         /* output parameter */
 302         u32 act_nr_of_cqes;
 303         u32 nr_pages;
 304 };
 305
 306 /*
 307  * Completion Queue
 308  */
 309 struct ehea_cq {
 310         struct ehea_adapter *adapter;
 311         u64 fw_handle;
 312         struct hw_queue hw_queue;
 313         struct h_epas epas;
 314         struct ehea_cq_attr attr;
 315 };
 316
 317 /*
 318  * Memory Region
 319  */
 320 struct ehea_mr {
 321         struct ehea_adapter *adapter;
 322         u64 handle;
 323         u64 vaddr;
 324         u32 lkey;
 325 };
 326
 327 /*
 328  * Port state information
 329  */
 330 struct port_stats {
 331         int poll_receive_errors;
 332         int queue_stopped;
 333         int err_tcp_cksum;
 334         int err_ip_cksum;
 335         int err_frame_crc;
 336 };
 337
 338 #define EHEA_IRQ_NAME_SIZE 20
 339
 340 /*
 341  * Queue SKB Array
 342  */
 343 struct ehea_q_skb_arr {
 344         struct sk_buff **arr;           /* skb array for queue */
 345         int len;                        /* array length */
 346         int index;                      /* array index */
 347         int os_skbs;                    /* rq2/rq3 only: outstanding skbs */
 348 };
 349
 350 /*
 351  * Port resources
 352  */
 353 struct ehea_port_res {
 354         struct napi_struct napi;
 355         struct port_stats p_stats;
 356         struct ehea_mr send_mr;         /* send memory region */
 357         struct ehea_mr recv_mr;         /* receive memory region */
 358         spinlock_t xmit_lock;
 359         struct ehea_port *port;
 360         char int_recv_name[EHEA_IRQ_NAME_SIZE];
 361         char int_send_name[EHEA_IRQ_NAME_SIZE];
 362         struct ehea_qp *qp;
 363         struct ehea_cq *send_cq;
 364         struct ehea_cq *recv_cq;
 365         struct ehea_eq *eq;
 366         struct ehea_q_skb_arr rq1_skba;
 367         struct ehea_q_skb_arr rq2_skba;
 368         struct ehea_q_skb_arr rq3_skba;
 369         struct ehea_q_skb_arr sq_skba;
 370         spinlock_t netif_queue;
 371         int queue_stopped;
 372         int swqe_refill_th;
 373         atomic_t swqe_avail;
 374         int swqe_ll_count;
 375         u32 swqe_id_counter;
 376         u64 tx_packets;
 377         u64 rx_packets;
 378         u32 poll_counter;
 379 };
 380
 381
 382 #define EHEA_MAX_PORTS 16
 383 struct ehea_adapter {
 384         u64 handle;
 385         struct ibmebus_dev *ebus_dev;
 386         struct ehea_port *port[EHEA_MAX_PORTS];
 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         int active_ports;
 394         struct list_head list;
 395 };
 396
 397
 398 struct ehea_mc_list {
 399         struct list_head list;
 400         u64 macaddr;
 401 };
 402
 403 #define EHEA_PORT_UP 1
 404 #define EHEA_PORT_DOWN 0
 405 #define EHEA_PHY_LINK_UP 1
 406 #define EHEA_PHY_LINK_DOWN 0
 407 #define EHEA_MAX_PORT_RES 16
 408 struct ehea_port {
 409         struct ehea_adapter *adapter;    /* adapter that owns this port */
 410         struct net_device *netdev;
 411         struct net_device_stats stats;
 412         struct ehea_port_res port_res[EHEA_MAX_PORT_RES];
 413         struct of_device  ofdev; /* Open Firmware Device */
 414         struct ehea_mc_list *mc_list;    /* Multicast MAC addresses */
 415         struct vlan_group *vgrp;
 416         struct ehea_eq *qp_eq;
 417         struct work_struct reset_task;
 418         struct semaphore port_lock;
 419         char int_aff_name[EHEA_IRQ_NAME_SIZE];
 420         int allmulti;                    /* Indicates IFF_ALLMULTI state */
 421         int promisc;                     /* Indicates IFF_PROMISC state */
 422         int num_tx_qps;
 423         int num_add_tx_qps;
 424         int num_mcs;
 425         int resets;
 426         u64 mac_addr;
 427         u32 logical_port_id;
 428         u32 port_speed;
 429         u32 msg_enable;
 430         u32 sig_comp_iv;
 431         u32 state;
 432         u8 phy_link;
 433         u8 full_duplex;
 434         u8 autoneg;
 435         u8 num_def_qps;
 436 };
 437
 438 struct port_res_cfg {
 439         int max_entries_rcq;
 440         int max_entries_scq;
 441         int max_entries_sq;
 442         int max_entries_rq1;
 443         int max_entries_rq2;
 444         int max_entries_rq3;
 445 };
 446
 447 enum ehea_flag_bits {
 448         __EHEA_STOP_XFER
 449 };
 450
 451 void ehea_set_ethtool_ops(struct net_device *netdev);
 452 int ehea_sense_port_attr(struct ehea_port *port);
 453 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed);
 454
 455 #endif  /* __EHEA_H__ */