LXR linux/drivers/net/ethernet/cavium/thunder/nicvf

   1/*
   2 * Copyright (C) 2015 Cavium, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms of version 2 of the GNU General Public License
   6 * as published by the Free Software Foundation.
   7 */
   8
   9#ifndef NICVF_QUEUES_H
  10#define NICVF_QUEUES_H
  11
  12#include <linux/netdevice.h>
  13#include "q_struct.h"
  14
  15#define MAX_QUEUE_SET                   128
  16#define MAX_RCV_QUEUES_PER_QS           8
  17#define MAX_RCV_BUF_DESC_RINGS_PER_QS   2
  18#define MAX_SND_QUEUES_PER_QS           8
  19#define MAX_CMP_QUEUES_PER_QS           8
  20
  21/* VF's queue interrupt ranges */
  22#define NICVF_INTR_ID_CQ                0
  23#define NICVF_INTR_ID_SQ                8
  24#define NICVF_INTR_ID_RBDR              16
  25#define NICVF_INTR_ID_MISC              18
  26#define NICVF_INTR_ID_QS_ERR            19
  27
  28#define for_each_cq_irq(irq)    \
  29        for (irq = NICVF_INTR_ID_CQ; irq < NICVF_INTR_ID_SQ; irq++)
  30#define for_each_sq_irq(irq)    \
  31        for (irq = NICVF_INTR_ID_SQ; irq < NICVF_INTR_ID_RBDR; irq++)
  32#define for_each_rbdr_irq(irq)  \
  33        for (irq = NICVF_INTR_ID_RBDR; irq < NICVF_INTR_ID_MISC; irq++)
  34
  35#define RBDR_SIZE0              0ULL /* 8K entries */
  36#define RBDR_SIZE1              1ULL /* 16K entries */
  37#define RBDR_SIZE2              2ULL /* 32K entries */
  38#define RBDR_SIZE3              3ULL /* 64K entries */
  39#define RBDR_SIZE4              4ULL /* 126K entries */
  40#define RBDR_SIZE5              5ULL /* 256K entries */
  41#define RBDR_SIZE6              6ULL /* 512K entries */
  42
  43#define SND_QUEUE_SIZE0         0ULL /* 1K entries */
  44#define SND_QUEUE_SIZE1         1ULL /* 2K entries */
  45#define SND_QUEUE_SIZE2         2ULL /* 4K entries */
  46#define SND_QUEUE_SIZE3         3ULL /* 8K entries */
  47#define SND_QUEUE_SIZE4         4ULL /* 16K entries */
  48#define SND_QUEUE_SIZE5         5ULL /* 32K entries */
  49#define SND_QUEUE_SIZE6         6ULL /* 64K entries */
  50
  51#define CMP_QUEUE_SIZE0         0ULL /* 1K entries */
  52#define CMP_QUEUE_SIZE1         1ULL /* 2K entries */
  53#define CMP_QUEUE_SIZE2         2ULL /* 4K entries */
  54#define CMP_QUEUE_SIZE3         3ULL /* 8K entries */
  55#define CMP_QUEUE_SIZE4         4ULL /* 16K entries */
  56#define CMP_QUEUE_SIZE5         5ULL /* 32K entries */
  57#define CMP_QUEUE_SIZE6         6ULL /* 64K entries */
  58
  59/* Default queue count per QS, its lengths and threshold values */
  60#define DEFAULT_RBDR_CNT        1
  61
  62#define SND_QSIZE               SND_QUEUE_SIZE0
  63#define SND_QUEUE_LEN           (1ULL << (SND_QSIZE + 10))
  64#define MIN_SND_QUEUE_LEN       (1ULL << (SND_QUEUE_SIZE0 + 10))
  65#define MAX_SND_QUEUE_LEN       (1ULL << (SND_QUEUE_SIZE6 + 10))
  66#define SND_QUEUE_THRESH        2ULL
  67#define MIN_SQ_DESC_PER_PKT_XMIT        2
  68/* Since timestamp not enabled, otherwise 2 */
  69#define MAX_CQE_PER_PKT_XMIT            1
  70
  71/* Keep CQ and SQ sizes same, if timestamping
  72 * is enabled this equation will change.
  73 */
  74#define CMP_QSIZE               CMP_QUEUE_SIZE0
  75#define CMP_QUEUE_LEN           (1ULL << (CMP_QSIZE + 10))
  76#define MIN_CMP_QUEUE_LEN       (1ULL << (CMP_QUEUE_SIZE0 + 10))
  77#define MAX_CMP_QUEUE_LEN       (1ULL << (CMP_QUEUE_SIZE6 + 10))
  78#define CMP_QUEUE_CQE_THRESH    (NAPI_POLL_WEIGHT / 2)
  79#define CMP_QUEUE_TIMER_THRESH  80 /* ~2usec */
  80
  81/* No of CQEs that might anyway gets used by HW due to pipelining
  82 * effects irrespective of PASS/DROP/LEVELS being configured
  83 */
  84#define CMP_QUEUE_PIPELINE_RSVD 544
  85
  86#define RBDR_SIZE               RBDR_SIZE0
  87#define RCV_BUF_COUNT           (1ULL << (RBDR_SIZE + 13))
  88#define MAX_RCV_BUF_COUNT       (1ULL << (RBDR_SIZE6 + 13))
  89#define RBDR_THRESH             (RCV_BUF_COUNT / 2)
  90#define DMA_BUFFER_LEN          1536 /* In multiples of 128bytes */
  91#define RCV_FRAG_LEN     (SKB_DATA_ALIGN(DMA_BUFFER_LEN + NET_SKB_PAD) + \
  92                         SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
  93
  94#define MAX_CQES_FOR_TX         ((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * \
  95                                 MAX_CQE_PER_PKT_XMIT)
  96
  97/* RED and Backpressure levels of CQ for pkt reception
  98 * For CQ, level is a measure of emptiness i.e 0x0 means full
  99 * eg: For CQ of size 4K, and for pass/drop levels of 160/144
 100 * HW accepts pkt if unused CQE >= 2560
 101 * RED accepts pkt if unused CQE < 2304 & >= 2560
 102 * DROPs pkts if unused CQE < 2304
 103 */
 104#define RQ_PASS_CQ_LVL         192ULL
 105#define RQ_DROP_CQ_LVL         184ULL
 106
 107/* RED and Backpressure levels of RBDR for pkt reception
 108 * For RBDR, level is a measure of fullness i.e 0x0 means empty
 109 * eg: For RBDR of size 8K, and for pass/drop levels of 4/0
 110 * HW accepts pkt if unused RBs >= 256
 111 * RED accepts pkt if unused RBs < 256 & >= 0
 112 * DROPs pkts if unused RBs < 0
 113 */
 114#define RQ_PASS_RBDR_LVL        8ULL
 115#define RQ_DROP_RBDR_LVL        0ULL
 116
 117/* Descriptor size in bytes */
 118#define SND_QUEUE_DESC_SIZE     16
 119#define CMP_QUEUE_DESC_SIZE     512
 120
 121/* Buffer / descriptor alignments */
 122#define NICVF_RCV_BUF_ALIGN             7
 123#define NICVF_RCV_BUF_ALIGN_BYTES       (1ULL << NICVF_RCV_BUF_ALIGN)
 124#define NICVF_CQ_BASE_ALIGN_BYTES       512  /* 9 bits */
 125#define NICVF_SQ_BASE_ALIGN_BYTES       128  /* 7 bits */
 126
 127#define NICVF_ALIGNED_ADDR(ADDR, ALIGN_BYTES)   ALIGN(ADDR, ALIGN_BYTES)
 128
 129/* Queue enable/disable */
 130#define NICVF_SQ_EN             BIT_ULL(19)
 131
 132/* Queue reset */
 133#define NICVF_CQ_RESET          BIT_ULL(41)
 134#define NICVF_SQ_RESET          BIT_ULL(17)
 135#define NICVF_RBDR_RESET        BIT_ULL(43)
 136
 137enum CQ_RX_ERRLVL_E {
 138        CQ_ERRLVL_MAC,
 139        CQ_ERRLVL_L2,
 140        CQ_ERRLVL_L3,
 141        CQ_ERRLVL_L4,
 142};
 143
 144enum CQ_RX_ERROP_E {
 145        CQ_RX_ERROP_RE_NONE = 0x0,
 146        CQ_RX_ERROP_RE_PARTIAL = 0x1,
 147        CQ_RX_ERROP_RE_JABBER = 0x2,
 148        CQ_RX_ERROP_RE_FCS = 0x7,
 149        CQ_RX_ERROP_RE_TERMINATE = 0x9,
 150        CQ_RX_ERROP_RE_RX_CTL = 0xb,
 151        CQ_RX_ERROP_PREL2_ERR = 0x1f,
 152        CQ_RX_ERROP_L2_FRAGMENT = 0x20,
 153        CQ_RX_ERROP_L2_OVERRUN = 0x21,
 154        CQ_RX_ERROP_L2_PFCS = 0x22,
 155        CQ_RX_ERROP_L2_PUNY = 0x23,
 156        CQ_RX_ERROP_L2_MAL = 0x24,
 157        CQ_RX_ERROP_L2_OVERSIZE = 0x25,
 158        CQ_RX_ERROP_L2_UNDERSIZE = 0x26,
 159        CQ_RX_ERROP_L2_LENMISM = 0x27,
 160        CQ_RX_ERROP_L2_PCLP = 0x28,
 161        CQ_RX_ERROP_IP_NOT = 0x41,
 162        CQ_RX_ERROP_IP_CSUM_ERR = 0x42,
 163        CQ_RX_ERROP_IP_MAL = 0x43,
 164        CQ_RX_ERROP_IP_MALD = 0x44,
 165        CQ_RX_ERROP_IP_HOP = 0x45,
 166        CQ_RX_ERROP_L3_ICRC = 0x46,
 167        CQ_RX_ERROP_L3_PCLP = 0x47,
 168        CQ_RX_ERROP_L4_MAL = 0x61,
 169        CQ_RX_ERROP_L4_CHK = 0x62,
 170        CQ_RX_ERROP_UDP_LEN = 0x63,
 171        CQ_RX_ERROP_L4_PORT = 0x64,
 172        CQ_RX_ERROP_TCP_FLAG = 0x65,
 173        CQ_RX_ERROP_TCP_OFFSET = 0x66,
 174        CQ_RX_ERROP_L4_PCLP = 0x67,
 175        CQ_RX_ERROP_RBDR_TRUNC = 0x70,
 176};
 177
 178enum CQ_TX_ERROP_E {
 179        CQ_TX_ERROP_GOOD = 0x0,
 180        CQ_TX_ERROP_DESC_FAULT = 0x10,
 181        CQ_TX_ERROP_HDR_CONS_ERR = 0x11,
 182        CQ_TX_ERROP_SUBDC_ERR = 0x12,
 183        CQ_TX_ERROP_MAX_SIZE_VIOL = 0x13,
 184        CQ_TX_ERROP_IMM_SIZE_OFLOW = 0x80,
 185        CQ_TX_ERROP_DATA_SEQUENCE_ERR = 0x81,
 186        CQ_TX_ERROP_MEM_SEQUENCE_ERR = 0x82,
 187        CQ_TX_ERROP_LOCK_VIOL = 0x83,
 188        CQ_TX_ERROP_DATA_FAULT = 0x84,
 189        CQ_TX_ERROP_TSTMP_CONFLICT = 0x85,
 190        CQ_TX_ERROP_TSTMP_TIMEOUT = 0x86,
 191        CQ_TX_ERROP_MEM_FAULT = 0x87,
 192        CQ_TX_ERROP_CK_OVERLAP = 0x88,
 193        CQ_TX_ERROP_CK_OFLOW = 0x89,
 194        CQ_TX_ERROP_ENUM_LAST = 0x8a,
 195};
 196
 197enum RQ_SQ_STATS {
 198        RQ_SQ_STATS_OCTS,
 199        RQ_SQ_STATS_PKTS,
 200};
 201
 202struct rx_tx_queue_stats {
 203        u64     bytes;
 204        u64     pkts;
 205} ____cacheline_aligned_in_smp;
 206
 207struct q_desc_mem {
 208        dma_addr_t      dma;
 209        u64             size;
 210        u16             q_len;
 211        dma_addr_t      phys_base;
 212        void            *base;
 213        void            *unalign_base;
 214};
 215
 216struct rbdr {
 217        bool            enable;
 218        u32             dma_size;
 219        u32             frag_len;
 220        u32             thresh;         /* Threshold level for interrupt */
 221        void            *desc;
 222        u32             head;
 223        u32             tail;
 224        struct q_desc_mem   dmem;
 225} ____cacheline_aligned_in_smp;
 226
 227struct rcv_queue {
 228        bool            enable;
 229        struct  rbdr    *rbdr_start;
 230        struct  rbdr    *rbdr_cont;
 231        bool            en_tcp_reassembly;
 232        u8              cq_qs;  /* CQ's QS to which this RQ is assigned */
 233        u8              cq_idx; /* CQ index (0 to 7) in the QS */
 234        u8              cont_rbdr_qs;      /* Continue buffer ptrs - QS num */
 235        u8              cont_qs_rbdr_idx;  /* RBDR idx in the cont QS */
 236        u8              start_rbdr_qs;     /* First buffer ptrs - QS num */
 237        u8              start_qs_rbdr_idx; /* RBDR idx in the above QS */
 238        u8              caching;
 239        struct          rx_tx_queue_stats stats;
 240} ____cacheline_aligned_in_smp;
 241
 242struct cmp_queue {
 243        bool            enable;
 244        u16             thresh;
 245        spinlock_t      lock;  /* lock to serialize processing CQEs */
 246        void            *desc;
 247        struct q_desc_mem   dmem;
 248        int             irq;
 249} ____cacheline_aligned_in_smp;
 250
 251struct snd_queue {
 252        bool            enable;
 253        u8              cq_qs;  /* CQ's QS to which this SQ is pointing */
 254        u8              cq_idx; /* CQ index (0 to 7) in the above QS */
 255        u16             thresh;
 256        atomic_t        free_cnt;
 257        u32             head;
 258        u32             tail;
 259        u64             *skbuff;
 260        void            *desc;
 261
 262#define TSO_HEADER_SIZE 128
 263        /* For TSO segment's header */
 264        char            *tso_hdrs;
 265        dma_addr_t      tso_hdrs_phys;
 266
 267        cpumask_t       affinity_mask;
 268        struct q_desc_mem   dmem;
 269        struct rx_tx_queue_stats stats;
 270} ____cacheline_aligned_in_smp;
 271
 272struct queue_set {
 273        bool            enable;
 274        bool            be_en;
 275        u8              vnic_id;
 276        u8              rq_cnt;
 277        u8              cq_cnt;
 278        u64             cq_len;
 279        u8              sq_cnt;
 280        u64             sq_len;
 281        u8              rbdr_cnt;
 282        u64             rbdr_len;
 283        struct  rcv_queue       rq[MAX_RCV_QUEUES_PER_QS];
 284        struct  cmp_queue       cq[MAX_CMP_QUEUES_PER_QS];
 285        struct  snd_queue       sq[MAX_SND_QUEUES_PER_QS];
 286        struct  rbdr            rbdr[MAX_RCV_BUF_DESC_RINGS_PER_QS];
 287} ____cacheline_aligned_in_smp;
 288
 289#define GET_RBDR_DESC(RING, idx)\
 290                (&(((struct rbdr_entry_t *)((RING)->desc))[idx]))
 291#define GET_SQ_DESC(RING, idx)\
 292                (&(((struct sq_hdr_subdesc *)((RING)->desc))[idx]))
 293#define GET_CQ_DESC(RING, idx)\
 294                (&(((union cq_desc_t *)((RING)->desc))[idx]))
 295
 296/* CQ status bits */
 297#define CQ_WR_FULL      BIT(26)
 298#define CQ_WR_DISABLE   BIT(25)
 299#define CQ_WR_FAULT     BIT(24)
 300#define CQ_CQE_COUNT    (0xFFFF << 0)
 301
 302#define CQ_ERR_MASK     (CQ_WR_FULL | CQ_WR_DISABLE | CQ_WR_FAULT)
 303
 304void nicvf_unmap_sndq_buffers(struct nicvf *nic, struct snd_queue *sq,
 305                              int hdr_sqe, u8 subdesc_cnt);
 306void nicvf_config_vlan_stripping(struct nicvf *nic,
 307                                 netdev_features_t features);
 308int nicvf_set_qset_resources(struct nicvf *nic);
 309int nicvf_config_data_transfer(struct nicvf *nic, bool enable);
 310void nicvf_qset_config(struct nicvf *nic, bool enable);
 311void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
 312                            int qidx, bool enable);
 313
 314void nicvf_sq_enable(struct nicvf *nic, struct snd_queue *sq, int qidx);
 315void nicvf_sq_disable(struct nicvf *nic, int qidx);
 316void nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt);
 317void nicvf_sq_free_used_descs(struct net_device *netdev,
 318                              struct snd_queue *sq, int qidx);
 319int nicvf_sq_append_skb(struct nicvf *nic, struct snd_queue *sq,
 320                        struct sk_buff *skb, u8 sq_num);
 321
 322struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx);
 323void nicvf_rbdr_task(unsigned long data);
 324void nicvf_rbdr_work(struct work_struct *work);
 325
 326void nicvf_enable_intr(struct nicvf *nic, int int_type, int q_idx);
 327void nicvf_disable_intr(struct nicvf *nic, int int_type, int q_idx);
 328void nicvf_clear_intr(struct nicvf *nic, int int_type, int q_idx);
 329int nicvf_is_intr_enabled(struct nicvf *nic, int int_type, int q_idx);
 330
 331/* Register access APIs */
 332void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val);
 333u64  nicvf_reg_read(struct nicvf *nic, u64 offset);
 334void nicvf_qset_reg_write(struct nicvf *nic, u64 offset, u64 val);
 335u64 nicvf_qset_reg_read(struct nicvf *nic, u64 offset);
 336void nicvf_queue_reg_write(struct nicvf *nic, u64 offset,
 337                           u64 qidx, u64 val);
 338u64  nicvf_queue_reg_read(struct nicvf *nic,
 339                          u64 offset, u64 qidx);
 340
 341/* Stats */
 342void nicvf_update_rq_stats(struct nicvf *nic, int rq_idx);
 343void nicvf_update_sq_stats(struct nicvf *nic, int sq_idx);
 344int nicvf_check_cqe_rx_errs(struct nicvf *nic, struct cqe_rx_t *cqe_rx);
 345int nicvf_check_cqe_tx_errs(struct nicvf *nic, struct cqe_send_t *cqe_tx);
 346#endif /* NICVF_QUEUES_H */
 347