drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h

   1 /*
   2  * This file is part of the Chelsio T4 Ethernet driver for Linux.
   3  *
   4  * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #ifndef __CXGB4_ULD_H
  36 #define __CXGB4_ULD_H
  37
  38 #include <linux/cache.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/skbuff.h>
  41 #include <linux/inetdevice.h>
  42 #include <linux/atomic.h>
  43 #include "cxgb4.h"
  44
  45 #define MAX_ULD_QSETS 16
  46
  47 /* CPL message priority levels */
  48 enum {
  49         CPL_PRIORITY_DATA     = 0,  /* data messages */
  50         CPL_PRIORITY_SETUP    = 1,  /* connection setup messages */
  51         CPL_PRIORITY_TEARDOWN = 0,  /* connection teardown messages */
  52         CPL_PRIORITY_LISTEN   = 1,  /* listen start/stop messages */
  53         CPL_PRIORITY_ACK      = 1,  /* RX ACK messages */
  54         CPL_PRIORITY_CONTROL  = 1   /* control messages */
  55 };
  56
  57 #define INIT_TP_WR(w, tid) do { \
  58         (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) | \
  59                               FW_WR_IMMDLEN_V(sizeof(*w) - sizeof(w->wr))); \
  60         (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*w), 16)) | \
  61                                FW_WR_FLOWID_V(tid)); \
  62         (w)->wr.wr_lo = cpu_to_be64(0); \
  63 } while (0)
  64
  65 #define INIT_TP_WR_CPL(w, cpl, tid) do { \
  66         INIT_TP_WR(w, tid); \
  67         OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
  68 } while (0)
  69
  70 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
  71         (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | \
  72                               FW_WR_ATOMIC_V(atomic)); \
  73         (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(wrlen, 16)) | \
  74                                FW_WR_FLOWID_V(tid)); \
  75         (w)->wr.wr_lo = cpu_to_be64(0); \
  76 } while (0)
  77
  78 /* Special asynchronous notification message */
  79 #define CXGB4_MSG_AN ((void *)1)
  80 #define TX_ULD(uld)(((uld) != CXGB4_ULD_CRYPTO) ? CXGB4_TX_OFLD :\
  81                       CXGB4_TX_CRYPTO)
  82
  83 struct serv_entry {
  84         void *data;
  85 };
  86
  87 union aopen_entry {
  88         void *data;
  89         union aopen_entry *next;
  90 };
  91
  92 struct eotid_entry {
  93         void *data;
  94 };
  95
  96 /*
  97  * Holds the size, base address, free list start, etc of the TID, server TID,
  98  * and active-open TID tables.  The tables themselves are allocated dynamically.
  99  */
 100 struct tid_info {
 101         void **tid_tab;
 102         unsigned int tid_base;
 103         unsigned int ntids;
 104
 105         struct serv_entry *stid_tab;
 106         unsigned long *stid_bmap;
 107         unsigned int nstids;
 108         unsigned int stid_base;
 109         unsigned int hash_base;
 110
 111         union aopen_entry *atid_tab;
 112         unsigned int natids;
 113         unsigned int atid_base;
 114
 115         struct filter_entry *hpftid_tab;
 116         unsigned long *hpftid_bmap;
 117         unsigned int nhpftids;
 118         unsigned int hpftid_base;
 119
 120         struct filter_entry *ftid_tab;
 121         unsigned long *ftid_bmap;
 122         unsigned int nftids;
 123         unsigned int ftid_base;
 124         unsigned int aftid_base;
 125         unsigned int aftid_end;
 126         /* Server filter region */
 127         unsigned int sftid_base;
 128         unsigned int nsftids;
 129
 130         spinlock_t atid_lock ____cacheline_aligned_in_smp;
 131         union aopen_entry *afree;
 132         unsigned int atids_in_use;
 133
 134         spinlock_t stid_lock;
 135         unsigned int stids_in_use;
 136         unsigned int v6_stids_in_use;
 137         unsigned int sftids_in_use;
 138
 139         /* ETHOFLD range */
 140         struct eotid_entry *eotid_tab;
 141         unsigned long *eotid_bmap;
 142         unsigned int eotid_base;
 143         unsigned int neotids;
 144
 145         /* TIDs in the TCAM */
 146         atomic_t tids_in_use;
 147         /* TIDs in the HASH */
 148         atomic_t hash_tids_in_use;
 149         atomic_t conns_in_use;
 150         /* lock for setting/clearing filter bitmap */
 151         spinlock_t ftid_lock;
 152 };
 153
 154 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
 155 {
 156         tid -= t->tid_base;
 157         return tid < t->ntids ? t->tid_tab[tid] : NULL;
 158 }
 159
 160 static inline bool tid_out_of_range(const struct tid_info *t, unsigned int tid)
 161 {
 162         return ((tid - t->tid_base) >= t->ntids);
 163 }
 164
 165 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
 166 {
 167         return atid < t->natids ? t->atid_tab[atid].data : NULL;
 168 }
 169
 170 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
 171 {
 172         /* Is it a server filter TID? */
 173         if (t->nsftids && (stid >= t->sftid_base)) {
 174                 stid -= t->sftid_base;
 175                 stid += t->nstids;
 176         } else {
 177                 stid -= t->stid_base;
 178         }
 179
 180         return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
 181 }
 182
 183 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
 184                                     unsigned int tid, unsigned short family)
 185 {
 186         t->tid_tab[tid - t->tid_base] = data;
 187         if (t->hash_base && (tid >= t->hash_base)) {
 188                 if (family == AF_INET6)
 189                         atomic_add(2, &t->hash_tids_in_use);
 190                 else
 191                         atomic_inc(&t->hash_tids_in_use);
 192         } else {
 193                 if (family == AF_INET6)
 194                         atomic_add(2, &t->tids_in_use);
 195                 else
 196                         atomic_inc(&t->tids_in_use);
 197         }
 198         atomic_inc(&t->conns_in_use);
 199 }
 200
 201 static inline struct eotid_entry *cxgb4_lookup_eotid(struct tid_info *t,
 202                                                      u32 eotid)
 203 {
 204         return eotid < t->neotids ? &t->eotid_tab[eotid] : NULL;
 205 }
 206
 207 static inline int cxgb4_get_free_eotid(struct tid_info *t)
 208 {
 209         int eotid;
 210
 211         eotid = find_first_zero_bit(t->eotid_bmap, t->neotids);
 212         if (eotid >= t->neotids)
 213                 eotid = -1;
 214
 215         return eotid;
 216 }
 217
 218 static inline void cxgb4_alloc_eotid(struct tid_info *t, u32 eotid, void *data)
 219 {
 220         set_bit(eotid, t->eotid_bmap);
 221         t->eotid_tab[eotid].data = data;
 222 }
 223
 224 static inline void cxgb4_free_eotid(struct tid_info *t, u32 eotid)
 225 {
 226         clear_bit(eotid, t->eotid_bmap);
 227         t->eotid_tab[eotid].data = NULL;
 228 }
 229
 230 int cxgb4_alloc_atid(struct tid_info *t, void *data);
 231 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
 232 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
 233 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
 234 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
 235 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid,
 236                       unsigned short family);
 237 struct in6_addr;
 238
 239 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
 240                         __be32 sip, __be16 sport, __be16 vlan,
 241                         unsigned int queue);
 242 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
 243                          const struct in6_addr *sip, __be16 sport,
 244                          unsigned int queue);
 245 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
 246                         unsigned int queue, bool ipv6);
 247 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
 248                                __be32 sip, __be16 sport, __be16 vlan,
 249                                unsigned int queue,
 250                                unsigned char port, unsigned char mask);
 251 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
 252                                unsigned int queue, bool ipv6);
 253
 254 /* Filter operation context to allow callers of cxgb4_set_filter() and
 255  * cxgb4_del_filter() to wait for an asynchronous completion.
 256  */
 257 struct filter_ctx {
 258         struct completion completion;   /* completion rendezvous */
 259         void *closure;                  /* caller's opaque information */
 260         int result;                     /* result of operation */
 261         u32 tid;                        /* to store tid */
 262 };
 263
 264 struct ch_filter_specification;
 265
 266 int cxgb4_get_free_ftid(struct net_device *dev, int family);
 267 int __cxgb4_set_filter(struct net_device *dev, int filter_id,
 268                        struct ch_filter_specification *fs,
 269                        struct filter_ctx *ctx);
 270 int __cxgb4_del_filter(struct net_device *dev, int filter_id,
 271                        struct ch_filter_specification *fs,
 272                        struct filter_ctx *ctx);
 273 int cxgb4_set_filter(struct net_device *dev, int filter_id,
 274                      struct ch_filter_specification *fs);
 275 int cxgb4_del_filter(struct net_device *dev, int filter_id,
 276                      struct ch_filter_specification *fs);
 277 int cxgb4_get_filter_counters(struct net_device *dev, unsigned int fidx,
 278                               u64 *hitcnt, u64 *bytecnt, bool hash);
 279
 280 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
 281 {
 282         skb_set_queue_mapping(skb, (queue << 1) | prio);
 283 }
 284
 285 enum cxgb4_uld {
 286         CXGB4_ULD_INIT,
 287         CXGB4_ULD_RDMA,
 288         CXGB4_ULD_ISCSI,
 289         CXGB4_ULD_ISCSIT,
 290         CXGB4_ULD_CRYPTO,
 291         CXGB4_ULD_TLS,
 292         CXGB4_ULD_MAX
 293 };
 294
 295 enum cxgb4_tx_uld {
 296         CXGB4_TX_OFLD,
 297         CXGB4_TX_CRYPTO,
 298         CXGB4_TX_MAX
 299 };
 300
 301 enum cxgb4_txq_type {
 302         CXGB4_TXQ_ETH,
 303         CXGB4_TXQ_ULD,
 304         CXGB4_TXQ_CTRL,
 305         CXGB4_TXQ_MAX
 306 };
 307
 308 enum cxgb4_state {
 309         CXGB4_STATE_UP,
 310         CXGB4_STATE_START_RECOVERY,
 311         CXGB4_STATE_DOWN,
 312         CXGB4_STATE_DETACH,
 313         CXGB4_STATE_FATAL_ERROR
 314 };
 315
 316 enum cxgb4_control {
 317         CXGB4_CONTROL_DB_FULL,
 318         CXGB4_CONTROL_DB_EMPTY,
 319         CXGB4_CONTROL_DB_DROP,
 320 };
 321
 322 struct pci_dev;
 323 struct l2t_data;
 324 struct net_device;
 325 struct pkt_gl;
 326 struct tp_tcp_stats;
 327 struct t4_lro_mgr;
 328
 329 struct cxgb4_range {
 330         unsigned int start;
 331         unsigned int size;
 332 };
 333
 334 struct cxgb4_virt_res {                      /* virtualized HW resources */
 335         struct cxgb4_range ddp;
 336         struct cxgb4_range iscsi;
 337         struct cxgb4_range stag;
 338         struct cxgb4_range rq;
 339         struct cxgb4_range srq;
 340         struct cxgb4_range pbl;
 341         struct cxgb4_range qp;
 342         struct cxgb4_range cq;
 343         struct cxgb4_range ocq;
 344         struct cxgb4_range key;
 345         unsigned int ncrypto_fc;
 346         struct cxgb4_range ppod_edram;
 347 };
 348
 349 struct chcr_stats_debug {
 350         atomic_t cipher_rqst;
 351         atomic_t digest_rqst;
 352         atomic_t aead_rqst;
 353         atomic_t complete;
 354         atomic_t error;
 355         atomic_t fallback;
 356         atomic_t ipsec_cnt;
 357         atomic_t tls_pdu_tx;
 358         atomic_t tls_pdu_rx;
 359         atomic_t tls_key;
 360 };
 361
 362 #define OCQ_WIN_OFFSET(pdev, vres) \
 363         (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
 364
 365 /*
 366  * Block of information the LLD provides to ULDs attaching to a device.
 367  */
 368 struct cxgb4_lld_info {
 369         struct pci_dev *pdev;                /* associated PCI device */
 370         struct l2t_data *l2t;                /* L2 table */
 371         struct tid_info *tids;               /* TID table */
 372         struct net_device **ports;           /* device ports */
 373         const struct cxgb4_virt_res *vr;     /* assorted HW resources */
 374         const unsigned short *mtus;          /* MTU table */
 375         const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
 376         const unsigned short *ciq_ids;       /* the ULD's concentrator IQ ids */
 377         unsigned short nrxq;                 /* # of Rx queues */
 378         unsigned short ntxq;                 /* # of Tx queues */
 379         unsigned short nciq;                 /* # of concentrator IQ */
 380         unsigned char nchan:4;               /* # of channels */
 381         unsigned char nports:4;              /* # of ports */
 382         unsigned char wr_cred;               /* WR 16-byte credits */
 383         unsigned char adapter_type;          /* type of adapter */
 384         unsigned char fw_api_ver;            /* FW API version */
 385         unsigned char crypto;                /* crypto support */
 386         unsigned int fw_vers;                /* FW version */
 387         unsigned int iscsi_iolen;            /* iSCSI max I/O length */
 388         unsigned int cclk_ps;                /* Core clock period in psec */
 389         unsigned short udb_density;          /* # of user DB/page */
 390         unsigned short ucq_density;          /* # of user CQs/page */
 391         unsigned int sge_host_page_size;     /* SGE host page size */
 392         unsigned short filt_mode;            /* filter optional components */
 393         unsigned short tx_modq[NCHAN];       /* maps each tx channel to a */
 394                                              /* scheduler queue */
 395         void __iomem *gts_reg;               /* address of GTS register */
 396         void __iomem *db_reg;                /* address of kernel doorbell */
 397         int dbfifo_int_thresh;               /* doorbell fifo int threshold */
 398         unsigned int sge_ingpadboundary;     /* SGE ingress padding boundary */
 399         unsigned int sge_egrstatuspagesize;  /* SGE egress status page size */
 400         unsigned int sge_pktshift;           /* Padding between CPL and */
 401                                              /* packet data */
 402         unsigned int pf;                     /* Physical Function we're using */
 403         bool enable_fw_ofld_conn;            /* Enable connection through fw */
 404                                              /* WR */
 405         unsigned int max_ordird_qp;          /* Max ORD/IRD depth per RDMA QP */
 406         unsigned int max_ird_adapter;        /* Max IRD memory per adapter */
 407         bool ulptx_memwrite_dsgl;            /* use of T5 DSGL allowed */
 408         unsigned int iscsi_tagmask;          /* iscsi ddp tag mask */
 409         unsigned int iscsi_pgsz_order;       /* iscsi ddp page size orders */
 410         unsigned int iscsi_llimit;           /* chip's iscsi region llimit */
 411         unsigned int ulp_crypto;             /* crypto lookaside support */
 412         void **iscsi_ppm;                    /* iscsi page pod manager */
 413         int nodeid;                          /* device numa node id */
 414         bool fr_nsmr_tpte_wr_support;        /* FW supports FR_NSMR_TPTE_WR */
 415         bool write_w_imm_support;         /* FW supports WRITE_WITH_IMMEDIATE */
 416         bool write_cmpl_support;             /* FW supports WRITE_CMPL WR */
 417 };
 418
 419 struct cxgb4_uld_info {
 420         char name[IFNAMSIZ];
 421         void *handle;
 422         unsigned int nrxq;
 423         unsigned int rxq_size;
 424         unsigned int ntxq;
 425         bool ciq;
 426         bool lro;
 427         void *(*add)(const struct cxgb4_lld_info *p);
 428         int (*rx_handler)(void *handle, const __be64 *rsp,
 429                           const struct pkt_gl *gl);
 430         int (*state_change)(void *handle, enum cxgb4_state new_state);
 431         int (*control)(void *handle, enum cxgb4_control control, ...);
 432         int (*lro_rx_handler)(void *handle, const __be64 *rsp,
 433                               const struct pkt_gl *gl,
 434                               struct t4_lro_mgr *lro_mgr,
 435                               struct napi_struct *napi);
 436         void (*lro_flush)(struct t4_lro_mgr *);
 437         int (*tx_handler)(struct sk_buff *skb, struct net_device *dev);
 438 };
 439
 440 void cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
 441 int cxgb4_unregister_uld(enum cxgb4_uld type);
 442 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
 443 int cxgb4_immdata_send(struct net_device *dev, unsigned int idx,
 444                        const void *src, unsigned int len);
 445 int cxgb4_crypto_send(struct net_device *dev, struct sk_buff *skb);
 446 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
 447 unsigned int cxgb4_port_chan(const struct net_device *dev);
 448 unsigned int cxgb4_port_e2cchan(const struct net_device *dev);
 449 unsigned int cxgb4_port_viid(const struct net_device *dev);
 450 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid);
 451 unsigned int cxgb4_port_idx(const struct net_device *dev);
 452 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
 453                             unsigned int *idx);
 454 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
 455                                     unsigned short header_size,
 456                                     unsigned short data_size_max,
 457                                     unsigned short data_size_align,
 458                                     unsigned int *mtu_idxp);
 459 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
 460                          struct tp_tcp_stats *v6);
 461 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
 462                       const unsigned int *pgsz_order);
 463 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
 464                                    unsigned int skb_len, unsigned int pull_len);
 465 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
 466 int cxgb4_flush_eq_cache(struct net_device *dev);
 467 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
 468 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
 469
 470 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS };
 471 int cxgb4_bar2_sge_qregs(struct net_device *dev,
 472                          unsigned int qid,
 473                          enum cxgb4_bar2_qtype qtype,
 474                          int user,
 475                          u64 *pbar2_qoffset,
 476                          unsigned int *pbar2_qid);
 477
 478 #endif  /* !__CXGB4_ULD_H */