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
  81 struct serv_entry {
  82         void *data;
  83 };
  84
  85 union aopen_entry {
  86         void *data;
  87         union aopen_entry *next;
  88 };
  89
  90 /*
  91  * Holds the size, base address, free list start, etc of the TID, server TID,
  92  * and active-open TID tables.  The tables themselves are allocated dynamically.
  93  */
  94 struct tid_info {
  95         void **tid_tab;
  96         unsigned int ntids;
  97
  98         struct serv_entry *stid_tab;
  99         unsigned long *stid_bmap;
 100         unsigned int nstids;
 101         unsigned int stid_base;
 102         unsigned int hash_base;
 103
 104         union aopen_entry *atid_tab;
 105         unsigned int natids;
 106         unsigned int atid_base;
 107
 108         struct filter_entry *ftid_tab;
 109         unsigned long *ftid_bmap;
 110         unsigned int nftids;
 111         unsigned int ftid_base;
 112         unsigned int aftid_base;
 113         unsigned int aftid_end;
 114         /* Server filter region */
 115         unsigned int sftid_base;
 116         unsigned int nsftids;
 117
 118         spinlock_t atid_lock ____cacheline_aligned_in_smp;
 119         union aopen_entry *afree;
 120         unsigned int atids_in_use;
 121
 122         spinlock_t stid_lock;
 123         unsigned int stids_in_use;
 124         unsigned int sftids_in_use;
 125
 126         /* TIDs in the TCAM */
 127         atomic_t tids_in_use;
 128         /* TIDs in the HASH */
 129         atomic_t hash_tids_in_use;
 130         /* lock for setting/clearing filter bitmap */
 131         spinlock_t ftid_lock;
 132 };
 133
 134 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
 135 {
 136         return tid < t->ntids ? t->tid_tab[tid] : NULL;
 137 }
 138
 139 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
 140 {
 141         return atid < t->natids ? t->atid_tab[atid].data : NULL;
 142 }
 143
 144 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
 145 {
 146         /* Is it a server filter TID? */
 147         if (t->nsftids && (stid >= t->sftid_base)) {
 148                 stid -= t->sftid_base;
 149                 stid += t->nstids;
 150         } else {
 151                 stid -= t->stid_base;
 152         }
 153
 154         return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL;
 155 }
 156
 157 static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
 158                                     unsigned int tid)
 159 {
 160         t->tid_tab[tid] = data;
 161         if (t->hash_base && (tid >= t->hash_base))
 162                 atomic_inc(&t->hash_tids_in_use);
 163         else
 164                 atomic_inc(&t->tids_in_use);
 165 }
 166
 167 int cxgb4_alloc_atid(struct tid_info *t, void *data);
 168 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
 169 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data);
 170 void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
 171 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
 172 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
 173
 174 struct in6_addr;
 175
 176 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
 177                         __be32 sip, __be16 sport, __be16 vlan,
 178                         unsigned int queue);
 179 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
 180                          const struct in6_addr *sip, __be16 sport,
 181                          unsigned int queue);
 182 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
 183                         unsigned int queue, bool ipv6);
 184 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
 185                                __be32 sip, __be16 sport, __be16 vlan,
 186                                unsigned int queue,
 187                                unsigned char port, unsigned char mask);
 188 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
 189                                unsigned int queue, bool ipv6);
 190
 191 /* Filter operation context to allow callers of cxgb4_set_filter() and
 192  * cxgb4_del_filter() to wait for an asynchronous completion.
 193  */
 194 struct filter_ctx {
 195         struct completion completion;   /* completion rendezvous */
 196         void *closure;                  /* caller's opaque information */
 197         int result;                     /* result of operation */
 198         u32 tid;                        /* to store tid */
 199 };
 200
 201 struct ch_filter_specification;
 202
 203 int __cxgb4_set_filter(struct net_device *dev, int filter_id,
 204                        struct ch_filter_specification *fs,
 205                        struct filter_ctx *ctx);
 206 int __cxgb4_del_filter(struct net_device *dev, int filter_id,
 207                        struct filter_ctx *ctx);
 208 int cxgb4_set_filter(struct net_device *dev, int filter_id,
 209                      struct ch_filter_specification *fs);
 210 int cxgb4_del_filter(struct net_device *dev, int filter_id);
 211
 212 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
 213 {
 214         skb_set_queue_mapping(skb, (queue << 1) | prio);
 215 }
 216
 217 enum cxgb4_uld {
 218         CXGB4_ULD_INIT,
 219         CXGB4_ULD_RDMA,
 220         CXGB4_ULD_ISCSI,
 221         CXGB4_ULD_ISCSIT,
 222         CXGB4_ULD_CRYPTO,
 223         CXGB4_ULD_MAX
 224 };
 225
 226 enum cxgb4_state {
 227         CXGB4_STATE_UP,
 228         CXGB4_STATE_START_RECOVERY,
 229         CXGB4_STATE_DOWN,
 230         CXGB4_STATE_DETACH
 231 };
 232
 233 enum cxgb4_control {
 234         CXGB4_CONTROL_DB_FULL,
 235         CXGB4_CONTROL_DB_EMPTY,
 236         CXGB4_CONTROL_DB_DROP,
 237 };
 238
 239 struct pci_dev;
 240 struct l2t_data;
 241 struct net_device;
 242 struct pkt_gl;
 243 struct tp_tcp_stats;
 244 struct t4_lro_mgr;
 245
 246 struct cxgb4_range {
 247         unsigned int start;
 248         unsigned int size;
 249 };
 250
 251 struct cxgb4_virt_res {                      /* virtualized HW resources */
 252         struct cxgb4_range ddp;
 253         struct cxgb4_range iscsi;
 254         struct cxgb4_range stag;
 255         struct cxgb4_range rq;
 256         struct cxgb4_range pbl;
 257         struct cxgb4_range qp;
 258         struct cxgb4_range cq;
 259         struct cxgb4_range ocq;
 260 };
 261
 262 #define OCQ_WIN_OFFSET(pdev, vres) \
 263         (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))
 264
 265 /*
 266  * Block of information the LLD provides to ULDs attaching to a device.
 267  */
 268 struct cxgb4_lld_info {
 269         struct pci_dev *pdev;                /* associated PCI device */
 270         struct l2t_data *l2t;                /* L2 table */
 271         struct tid_info *tids;               /* TID table */
 272         struct net_device **ports;           /* device ports */
 273         const struct cxgb4_virt_res *vr;     /* assorted HW resources */
 274         const unsigned short *mtus;          /* MTU table */
 275         const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
 276         const unsigned short *ciq_ids;       /* the ULD's concentrator IQ ids */
 277         unsigned short nrxq;                 /* # of Rx queues */
 278         unsigned short ntxq;                 /* # of Tx queues */
 279         unsigned short nciq;                 /* # of concentrator IQ */
 280         unsigned char nchan:4;               /* # of channels */
 281         unsigned char nports:4;              /* # of ports */
 282         unsigned char wr_cred;               /* WR 16-byte credits */
 283         unsigned char adapter_type;          /* type of adapter */
 284         unsigned char fw_api_ver;            /* FW API version */
 285         unsigned int fw_vers;                /* FW version */
 286         unsigned int iscsi_iolen;            /* iSCSI max I/O length */
 287         unsigned int cclk_ps;                /* Core clock period in psec */
 288         unsigned short udb_density;          /* # of user DB/page */
 289         unsigned short ucq_density;          /* # of user CQs/page */
 290         unsigned short filt_mode;            /* filter optional components */
 291         unsigned short tx_modq[NCHAN];       /* maps each tx channel to a */
 292                                              /* scheduler queue */
 293         void __iomem *gts_reg;               /* address of GTS register */
 294         void __iomem *db_reg;                /* address of kernel doorbell */
 295         int dbfifo_int_thresh;               /* doorbell fifo int threshold */
 296         unsigned int sge_ingpadboundary;     /* SGE ingress padding boundary */
 297         unsigned int sge_egrstatuspagesize;  /* SGE egress status page size */
 298         unsigned int sge_pktshift;           /* Padding between CPL and */
 299                                              /* packet data */
 300         unsigned int pf;                     /* Physical Function we're using */
 301         bool enable_fw_ofld_conn;            /* Enable connection through fw */
 302                                              /* WR */
 303         unsigned int max_ordird_qp;          /* Max ORD/IRD depth per RDMA QP */
 304         unsigned int max_ird_adapter;        /* Max IRD memory per adapter */
 305         bool ulptx_memwrite_dsgl;            /* use of T5 DSGL allowed */
 306         unsigned int iscsi_tagmask;          /* iscsi ddp tag mask */
 307         unsigned int iscsi_pgsz_order;       /* iscsi ddp page size orders */
 308         unsigned int iscsi_llimit;           /* chip's iscsi region llimit */
 309         void **iscsi_ppm;                    /* iscsi page pod manager */
 310         int nodeid;                          /* device numa node id */
 311         bool fr_nsmr_tpte_wr_support;        /* FW supports FR_NSMR_TPTE_WR */
 312 };
 313
 314 struct cxgb4_uld_info {
 315         const char *name;
 316         void *handle;
 317         unsigned int nrxq;
 318         unsigned int rxq_size;
 319         bool ciq;
 320         bool lro;
 321         void *(*add)(const struct cxgb4_lld_info *p);
 322         int (*rx_handler)(void *handle, const __be64 *rsp,
 323                           const struct pkt_gl *gl);
 324         int (*state_change)(void *handle, enum cxgb4_state new_state);
 325         int (*control)(void *handle, enum cxgb4_control control, ...);
 326         int (*lro_rx_handler)(void *handle, const __be64 *rsp,
 327                               const struct pkt_gl *gl,
 328                               struct t4_lro_mgr *lro_mgr,
 329                               struct napi_struct *napi);
 330         void (*lro_flush)(struct t4_lro_mgr *);
 331 };
 332
 333 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
 334 int cxgb4_unregister_uld(enum cxgb4_uld type);
 335 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
 336 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo);
 337 unsigned int cxgb4_port_chan(const struct net_device *dev);
 338 unsigned int cxgb4_port_viid(const struct net_device *dev);
 339 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid);
 340 unsigned int cxgb4_port_idx(const struct net_device *dev);
 341 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
 342                             unsigned int *idx);
 343 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
 344                                     unsigned short header_size,
 345                                     unsigned short data_size_max,
 346                                     unsigned short data_size_align,
 347                                     unsigned int *mtu_idxp);
 348 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
 349                          struct tp_tcp_stats *v6);
 350 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
 351                       const unsigned int *pgsz_order);
 352 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
 353                                    unsigned int skb_len, unsigned int pull_len);
 354 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size);
 355 int cxgb4_flush_eq_cache(struct net_device *dev);
 356 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte);
 357 u64 cxgb4_read_sge_timestamp(struct net_device *dev);
 358
 359 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS };
 360 int cxgb4_bar2_sge_qregs(struct net_device *dev,
 361                          unsigned int qid,
 362                          enum cxgb4_bar2_qtype qtype,
 363                          int user,
 364                          u64 *pbar2_qoffset,
 365                          unsigned int *pbar2_qid);
 366
 367 #endif  /* !__CXGB4_ULD_H */