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 /*
  93  * Holds the size, base address, free list start, etc of the TID, server TID,
  94  * and active-open TID tables.  The tables themselves are allocated dynamically.
  95  */
  96 struct tid_info {
  97         void **tid_tab;
  98         unsigned int ntids;
  99
 100         struct serv_entry *stid_tab;
 101         unsigned long *stid_bmap;
 102         unsigned int nstids;
 103         unsigned int stid_base;
 104         unsigned int hash_base;
 105
 106         union aopen_entry *atid_tab;
 107         unsigned int natids;
 108         unsigned int atid_base;
 109
 110         struct filter_entry *ftid_tab;
 111         unsigned long *ftid_bmap;
 112         unsigned int nftids;
 113         unsigned int ftid_base;
 114         unsigned int aftid_base;
 115         unsigned int aftid_end;
 116         /* Server filter region */
 117         unsigned int sftid_base;
 118         unsigned int nsftids;
 119
 120         spinlock_t atid_lock ____cacheline_aligned_in_smp;
 121         union aopen_entry *afree;
 122         unsigned int atids_in_use;
 123
 124         spinlock_t stid_lock;
 125         unsigned int stids_in_use;
 126         unsigned int v6_stids_in_use;
 127         unsigned int sftids_in_use;
 128
 129         /* TIDs in the TCAM */
 130         atomic_t tids_in_use;
 131         /* TIDs in the HASH */
 132         atomic_t hash_tids_in_use;
 133         atomic_t conns_in_use;
 134         /* lock for setting/clearing filter bitmap */
 135         spinlock_t ftid_lock;
 136 };
 137
 138 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
 139 {
 140         return tid < t->ntids ? t->tid_tab[tid] : NULL;
 141 }
 142
 143 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
 144 {
 145         return atid < t->natids ? t->atid_tab[atid].data : NULL;
 146 }
 147
 148 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
 149 {
 150         /* Is it a server filter TID? */
 151         if (t->nsftids && (stid >= t->sftid_base)) {
 152                 stid -= t->sftid_base;
 153                 stid += t->nstids;
 154         } else {
 155                 stid -= t->stid_base;
 156         }
 157
 158         return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
 159 }
 160
 161 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
 162                                     unsigned int tid, unsigned short family)
 163 {
 164         t->tid_tab[tid] = data;
 165         if (t->hash_base && (tid >= t->hash_base)) {
 166                 if (family == AF_INET6)
 167                         atomic_add(2, &t->hash_tids_in_use);
 168                 else
 169                         atomic_inc(&t->hash_tids_in_use);
 170         } else {
 171                 if (family == AF_INET6)
 172                         atomic_add(2, &t->tids_in_use);
 173                 else
 174                         atomic_inc(&t->tids_in_use);
 175         }
 176         atomic_inc(&t->conns_in_use);
 177 }
 178
 179 int cxgb4_alloc_atid(struct tid_info *t, void *data);
 180 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
 181 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
 182 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
 183 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
 184 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid,
 185                       unsigned short family);
 186 struct in6_addr;
 187
 188 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
 189                         __be32 sip, __be16 sport, __be16 vlan,
 190                         unsigned int queue);
 191 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
 192                          const struct in6_addr *sip, __be16 sport,
 193                          unsigned int queue);
 194 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
 195                         unsigned int queue, bool ipv6);
 196 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
 197                                __be32 sip, __be16 sport, __be16 vlan,
 198                                unsigned int queue,
 199                                unsigned char port, unsigned char mask);
 200 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
 201                                unsigned int queue, bool ipv6);
 202
 203 /* Filter operation context to allow callers of cxgb4_set_filter() and
 204  * cxgb4_del_filter() to wait for an asynchronous completion.
 205  */
 206 struct filter_ctx {
 207         struct completion completion;   /* completion rendezvous */
 208         void *closure;                  /* caller's opaque information */
 209         int result;                     /* result of operation */
 210         u32 tid;                        /* to store tid */
 211 };
 212
 213 struct ch_filter_specification;
 214
 215 int cxgb4_get_free_ftid(struct net_device *dev, int family);
 216 int __cxgb4_set_filter(struct net_device *dev, int filter_id,
 217                        struct ch_filter_specification *fs,
 218                        struct filter_ctx *ctx);
 219 int __cxgb4_del_filter(struct net_device *dev, int filter_id,
 220                        struct ch_filter_specification *fs,
 221                        struct filter_ctx *ctx);
 222 int cxgb4_set_filter(struct net_device *dev, int filter_id,
 223                      struct ch_filter_specification *fs);
 224 int cxgb4_del_filter(struct net_device *dev, int filter_id,
 225                      struct ch_filter_specification *fs);
 226 int cxgb4_get_filter_counters(struct net_device *dev, unsigned int fidx,
 227                               u64 *hitcnt, u64 *bytecnt, bool hash);
 228
 229 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
 230 {
 231         skb_set_queue_mapping(skb, (queue << 1) | prio);
 232 }
 233
 234 enum cxgb4_uld {
 235         CXGB4_ULD_INIT,
 236         CXGB4_ULD_RDMA,
 237         CXGB4_ULD_ISCSI,
 238         CXGB4_ULD_ISCSIT,
 239         CXGB4_ULD_CRYPTO,
 240         CXGB4_ULD_TLS,
 241         CXGB4_ULD_MAX
 242 };
 243
 244 enum cxgb4_tx_uld {
 245         CXGB4_TX_OFLD,
 246         CXGB4_TX_CRYPTO,
 247         CXGB4_TX_MAX
 248 };
 249
 250 enum cxgb4_txq_type {
 251         CXGB4_TXQ_ETH,
 252         CXGB4_TXQ_ULD,
 253         CXGB4_TXQ_CTRL,
 254         CXGB4_TXQ_MAX
 255 };
 256
 257 enum cxgb4_state {
 258         CXGB4_STATE_UP,
 259         CXGB4_STATE_START_RECOVERY,
 260         CXGB4_STATE_DOWN,
 261         CXGB4_STATE_DETACH,
 262         CXGB4_STATE_FATAL_ERROR
 263 };
 264
 265 enum cxgb4_control {
 266         CXGB4_CONTROL_DB_FULL,
 267         CXGB4_CONTROL_DB_EMPTY,
 268         CXGB4_CONTROL_DB_DROP,
 269 };
 270
 271 struct pci_dev;
 272 struct l2t_data;
 273 struct net_device;
 274 struct pkt_gl;
 275 struct tp_tcp_stats;
 276 struct t4_lro_mgr;
 277
 278 struct cxgb4_range {
 279         unsigned int start;
 280         unsigned int size;
 281 };
 282
 283 struct cxgb4_virt_res {                      /* virtualized HW resources */
 284         struct cxgb4_range ddp;
 285         struct cxgb4_range iscsi;
 286         struct cxgb4_range stag;
 287         struct cxgb4_range rq;
 288         struct cxgb4_range srq;
 289         struct cxgb4_range pbl;
 290         struct cxgb4_range qp;
 291         struct cxgb4_range cq;
 292         struct cxgb4_range ocq;
 293         struct cxgb4_range key;
 294         unsigned int ncrypto_fc;
 295 };
 296
 297 struct chcr_stats_debug {
 298         atomic_t cipher_rqst;
 299         atomic_t digest_rqst;
 300         atomic_t aead_rqst;
 301         atomic_t complete;
 302         atomic_t error;
 303         atomic_t fallback;
 304         atomic_t ipsec_cnt;
 305         atomic_t tls_pdu_tx;
 306         atomic_t tls_pdu_rx;
 307         atomic_t tls_key;
 308 };
 309
 310 #define OCQ_WIN_OFFSET(pdev, vres) \
 311         (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
 312
 313 /*
 314  * Block of information the LLD provides to ULDs attaching to a device.
 315  */
 316 struct cxgb4_lld_info {
 317         struct pci_dev *pdev;                /* associated PCI device */
 318         struct l2t_data *l2t;                /* L2 table */
 319         struct tid_info *tids;               /* TID table */
 320         struct net_device **ports;           /* device ports */
 321         const struct cxgb4_virt_res *vr;     /* assorted HW resources */
 322         const unsigned short *mtus;          /* MTU table */
 323         const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
 324         const unsigned short *ciq_ids;       /* the ULD's concentrator IQ ids */
 325         unsigned short nrxq;                 /* # of Rx queues */
 326         unsigned short ntxq;                 /* # of Tx queues */
 327         unsigned short nciq;                 /* # of concentrator IQ */
 328         unsigned char nchan:4;               /* # of channels */
 329         unsigned char nports:4;              /* # of ports */
 330         unsigned char wr_cred;               /* WR 16-byte credits */
 331         unsigned char adapter_type;          /* type of adapter */
 332         unsigned char fw_api_ver;            /* FW API version */
 333         unsigned char crypto;                /* crypto support */
 334         unsigned int fw_vers;                /* FW version */
 335         unsigned int iscsi_iolen;            /* iSCSI max I/O length */
 336         unsigned int cclk_ps;                /* Core clock period in psec */
 337         unsigned short udb_density;          /* # of user DB/page */
 338         unsigned short ucq_density;          /* # of user CQs/page */
 339         unsigned short filt_mode;            /* filter optional components */
 340         unsigned short tx_modq[NCHAN];       /* maps each tx channel to a */
 341                                              /* scheduler queue */
 342         void __iomem *gts_reg;               /* address of GTS register */
 343         void __iomem *db_reg;                /* address of kernel doorbell */
 344         int dbfifo_int_thresh;               /* doorbell fifo int threshold */
 345         unsigned int sge_ingpadboundary;     /* SGE ingress padding boundary */
 346         unsigned int sge_egrstatuspagesize;  /* SGE egress status page size */
 347         unsigned int sge_pktshift;           /* Padding between CPL and */
 348                                              /* packet data */
 349         unsigned int pf;                     /* Physical Function we're using */
 350         bool enable_fw_ofld_conn;            /* Enable connection through fw */
 351                                              /* WR */
 352         unsigned int max_ordird_qp;          /* Max ORD/IRD depth per RDMA QP */
 353         unsigned int max_ird_adapter;        /* Max IRD memory per adapter */
 354         bool ulptx_memwrite_dsgl;            /* use of T5 DSGL allowed */
 355         unsigned int iscsi_tagmask;          /* iscsi ddp tag mask */
 356         unsigned int iscsi_pgsz_order;       /* iscsi ddp page size orders */
 357         unsigned int iscsi_llimit;           /* chip's iscsi region llimit */
 358         unsigned int ulp_crypto;             /* crypto lookaside support */
 359         void **iscsi_ppm;                    /* iscsi page pod manager */
 360         int nodeid;                          /* device numa node id */
 361         bool fr_nsmr_tpte_wr_support;        /* FW supports FR_NSMR_TPTE_WR */
 362         bool write_w_imm_support;         /* FW supports WRITE_WITH_IMMEDIATE */
 363         bool write_cmpl_support;             /* FW supports WRITE_CMPL WR */
 364 };
 365
 366 struct cxgb4_uld_info {
 367         char name[IFNAMSIZ];
 368         void *handle;
 369         unsigned int nrxq;
 370         unsigned int rxq_size;
 371         unsigned int ntxq;
 372         bool ciq;
 373         bool lro;
 374         void *(*add)(const struct cxgb4_lld_info *p);
 375         int (*rx_handler)(void *handle, const __be64 *rsp,
 376                           const struct pkt_gl *gl);
 377         int (*state_change)(void *handle, enum cxgb4_state new_state);
 378         int (*control)(void *handle, enum cxgb4_control control, ...);
 379         int (*lro_rx_handler)(void *handle, const __be64 *rsp,
 380                               const struct pkt_gl *gl,
 381                               struct t4_lro_mgr *lro_mgr,
 382                               struct napi_struct *napi);
 383         void (*lro_flush)(struct t4_lro_mgr *);
 384         int (*tx_handler)(struct sk_buff *skb, struct net_device *dev);
 385 };
 386
 387 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
 388 int cxgb4_unregister_uld(enum cxgb4_uld type);
 389 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
 390 int cxgb4_immdata_send(struct net_device *dev, unsigned int idx,
 391                        const void *src, unsigned int len);
 392 int cxgb4_crypto_send(struct net_device *dev, struct sk_buff *skb);
 393 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
 394 unsigned int cxgb4_port_chan(const struct net_device *dev);
 395 unsigned int cxgb4_port_viid(const struct net_device *dev);
 396 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid);
 397 unsigned int cxgb4_port_idx(const struct net_device *dev);
 398 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
 399                             unsigned int *idx);
 400 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
 401                                     unsigned short header_size,
 402                                     unsigned short data_size_max,
 403                                     unsigned short data_size_align,
 404                                     unsigned int *mtu_idxp);
 405 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
 406                          struct tp_tcp_stats *v6);
 407 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
 408                       const unsigned int *pgsz_order);
 409 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
 410                                    unsigned int skb_len, unsigned int pull_len);
 411 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
 412 int cxgb4_flush_eq_cache(struct net_device *dev);
 413 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
 414 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
 415
 416 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS };
 417 int cxgb4_bar2_sge_qregs(struct net_device *dev,
 418                          unsigned int qid,
 419                          enum cxgb4_bar2_qtype qtype,
 420                          int user,
 421                          u64 *pbar2_qoffset,
 422                          unsigned int *pbar2_qid);
 423
 424 #endif  /* !__CXGB4_ULD_H */