drivers/net/benet/be.h

   1 /*
   2  * Copyright (C) 2005 - 2009 ServerEngines
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation.  The full GNU General
   8  * Public License is included in this distribution in the file called COPYING.
   9  *
  10  * Contact Information:
  11  * linux-drivers@serverengines.com
  12  *
  13  * ServerEngines
  14  * 209 N. Fair Oaks Ave
  15  * Sunnyvale, CA 94085
  16  */
  17
  18 #ifndef BE_H
  19 #define BE_H
  20
  21 #include <linux/pci.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/version.h>
  24 #include <linux/delay.h>
  25 #include <net/tcp.h>
  26 #include <net/ip.h>
  27 #include <net/ipv6.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/inet_lro.h>
  32
  33 #include "be_hw.h"
  34
  35 #define DRV_VER                 "2.0.348"
  36 #define DRV_NAME                "be2net"
  37 #define BE_NAME                 "ServerEngines BladeEngine2 10Gbps NIC"
  38 #define OC_NAME                 "Emulex OneConnect 10Gbps NIC"
  39 #define DRV_DESC                BE_NAME "Driver"
  40
  41 #define BE_VENDOR_ID            0x19a2
  42 #define BE_DEVICE_ID1           0x211
  43 #define OC_DEVICE_ID1           0x700
  44 #define OC_DEVICE_ID2           0x701
  45
  46 static inline char *nic_name(struct pci_dev *pdev)
  47 {
  48         if (pdev->device == OC_DEVICE_ID1 || pdev->device == OC_DEVICE_ID2)
  49                 return OC_NAME;
  50         else
  51                 return BE_NAME;
  52 }
  53
  54 /* Number of bytes of an RX frame that are copied to skb->data */
  55 #define BE_HDR_LEN              64
  56 #define BE_MAX_JUMBO_FRAME_SIZE 9018
  57 #define BE_MIN_MTU              256
  58
  59 #define BE_NUM_VLANS_SUPPORTED  64
  60 #define BE_MAX_EQD              96
  61 #define BE_MAX_TX_FRAG_COUNT    30
  62
  63 #define EVNT_Q_LEN              1024
  64 #define TX_Q_LEN                2048
  65 #define TX_CQ_LEN               1024
  66 #define RX_Q_LEN                1024    /* Does not support any other value */
  67 #define RX_CQ_LEN               1024
  68 #define MCC_Q_LEN               128     /* total size not to exceed 8 pages */
  69 #define MCC_CQ_LEN              256
  70
  71 #define BE_NAPI_WEIGHT          64
  72 #define MAX_RX_POST             BE_NAPI_WEIGHT /* Frags posted at a time */
  73 #define RX_FRAGS_REFILL_WM      (RX_Q_LEN - MAX_RX_POST)
  74
  75 #define BE_MAX_LRO_DESCRIPTORS  16
  76 #define BE_MAX_FRAGS_PER_FRAME  16
  77
  78 struct be_dma_mem {
  79         void *va;
  80         dma_addr_t dma;
  81         u32 size;
  82 };
  83
  84 struct be_queue_info {
  85         struct be_dma_mem dma_mem;
  86         u16 len;
  87         u16 entry_size; /* Size of an element in the queue */
  88         u16 id;
  89         u16 tail, head;
  90         bool created;
  91         atomic_t used;  /* Number of valid elements in the queue */
  92 };
  93
  94 static inline u32 MODULO(u16 val, u16 limit)
  95 {
  96         BUG_ON(limit & (limit - 1));
  97         return val & (limit - 1);
  98 }
  99
 100 static inline void index_adv(u16 *index, u16 val, u16 limit)
 101 {
 102         *index = MODULO((*index + val), limit);
 103 }
 104
 105 static inline void index_inc(u16 *index, u16 limit)
 106 {
 107         *index = MODULO((*index + 1), limit);
 108 }
 109
 110 static inline void *queue_head_node(struct be_queue_info *q)
 111 {
 112         return q->dma_mem.va + q->head * q->entry_size;
 113 }
 114
 115 static inline void *queue_tail_node(struct be_queue_info *q)
 116 {
 117         return q->dma_mem.va + q->tail * q->entry_size;
 118 }
 119
 120 static inline void queue_head_inc(struct be_queue_info *q)
 121 {
 122         index_inc(&q->head, q->len);
 123 }
 124
 125 static inline void queue_tail_inc(struct be_queue_info *q)
 126 {
 127         index_inc(&q->tail, q->len);
 128 }
 129
 130
 131 struct be_eq_obj {
 132         struct be_queue_info q;
 133         char desc[32];
 134
 135         /* Adaptive interrupt coalescing (AIC) info */
 136         bool enable_aic;
 137         u16 min_eqd;            /* in usecs */
 138         u16 max_eqd;            /* in usecs */
 139         u16 cur_eqd;            /* in usecs */
 140
 141         struct napi_struct napi;
 142 };
 143
 144 struct be_mcc_obj {
 145         struct be_queue_info q;
 146         struct be_queue_info cq;
 147 };
 148
 149 struct be_ctrl_info {
 150         u8 __iomem *csr;
 151         u8 __iomem *db;         /* Door Bell */
 152         u8 __iomem *pcicfg;     /* PCI config space */
 153         int pci_func;
 154
 155         /* Mbox used for cmd request/response */
 156         spinlock_t mbox_lock;   /* For serializing mbox cmds to BE card */
 157         struct be_dma_mem mbox_mem;
 158         /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
 159          * is stored for freeing purpose */
 160         struct be_dma_mem mbox_mem_alloced;
 161
 162         /* MCC Rings */
 163         struct be_mcc_obj mcc_obj;
 164         spinlock_t mcc_lock;    /* For serializing mcc cmds to BE card */
 165         spinlock_t mcc_cq_lock;
 166 };
 167
 168 #include "be_cmds.h"
 169
 170 struct be_drvr_stats {
 171         u32 be_tx_reqs;         /* number of TX requests initiated */
 172         u32 be_tx_stops;        /* number of times TX Q was stopped */
 173         u32 be_fwd_reqs;        /* number of send reqs through forwarding i/f */
 174         u32 be_tx_wrbs;         /* number of tx WRBs used */
 175         u32 be_tx_events;       /* number of tx completion events  */
 176         u32 be_tx_compl;        /* number of tx completion entries processed */
 177         ulong be_tx_jiffies;
 178         u64 be_tx_bytes;
 179         u64 be_tx_bytes_prev;
 180         u32 be_tx_rate;
 181
 182         u32 cache_barrier[16];
 183
 184         u32 be_ethrx_post_fail;/* number of ethrx buffer alloc failures */
 185         u32 be_polls;           /* number of times NAPI called poll function */
 186         u32 be_rx_events;       /* number of ucast rx completion events  */
 187         u32 be_rx_compl;        /* number of rx completion entries processed */
 188         u32 be_lro_hgram_data[8];       /* histogram of LRO data packets */
 189         u32 be_lro_hgram_ack[8];        /* histogram of LRO ACKs */
 190         ulong be_rx_jiffies;
 191         u64 be_rx_bytes;
 192         u64 be_rx_bytes_prev;
 193         u32 be_rx_rate;
 194         /* number of non ether type II frames dropped where
 195          * frame len > length field of Mac Hdr */
 196         u32 be_802_3_dropped_frames;
 197         /* number of non ether type II frames malformed where
 198          * in frame len < length field of Mac Hdr */
 199         u32 be_802_3_malformed_frames;
 200         u32 be_rxcp_err;        /* Num rx completion entries w/ err set. */
 201         ulong rx_fps_jiffies;   /* jiffies at last FPS calc */
 202         u32 be_rx_frags;
 203         u32 be_prev_rx_frags;
 204         u32 be_rx_fps;          /* Rx frags per second */
 205 };
 206
 207 struct be_stats_obj {
 208         struct be_drvr_stats drvr_stats;
 209         struct net_device_stats net_stats;
 210         struct be_dma_mem cmd;
 211 };
 212
 213 struct be_tx_obj {
 214         struct be_queue_info q;
 215         struct be_queue_info cq;
 216         /* Remember the skbs that were transmitted */
 217         struct sk_buff *sent_skb_list[TX_Q_LEN];
 218 };
 219
 220 /* Struct to remember the pages posted for rx frags */
 221 struct be_rx_page_info {
 222         struct page *page;
 223         dma_addr_t bus;
 224         u16 page_offset;
 225         bool last_page_user;
 226 };
 227
 228 struct be_rx_obj {
 229         struct be_queue_info q;
 230         struct be_queue_info cq;
 231         struct be_rx_page_info page_info_tbl[RX_Q_LEN];
 232         struct net_lro_mgr lro_mgr;
 233         struct net_lro_desc lro_desc[BE_MAX_LRO_DESCRIPTORS];
 234 };
 235
 236 #define BE_NUM_MSIX_VECTORS             2       /* 1 each for Tx and Rx */
 237 struct be_adapter {
 238         struct pci_dev *pdev;
 239         struct net_device *netdev;
 240
 241         /* Mbox, pci config, csr address information */
 242         struct be_ctrl_info ctrl;
 243
 244         struct msix_entry msix_entries[BE_NUM_MSIX_VECTORS];
 245         bool msix_enabled;
 246         bool isr_registered;
 247
 248         /* TX Rings */
 249         struct be_eq_obj tx_eq;
 250         struct be_tx_obj tx_obj;
 251
 252         u32 cache_line_break[8];
 253
 254         /* Rx rings */
 255         struct be_eq_obj rx_eq;
 256         struct be_rx_obj rx_obj;
 257         u32 big_page_size;      /* Compounded page size shared by rx wrbs */
 258         bool rx_post_starved;   /* Zero rx frags have been posted to BE */
 259
 260         struct vlan_group *vlan_grp;
 261         u16 num_vlans;
 262         u8 vlan_tag[VLAN_GROUP_ARRAY_LEN];
 263
 264         struct be_stats_obj stats;
 265         /* Work queue used to perform periodic tasks like getting statistics */
 266         struct delayed_work work;
 267
 268         /* Ethtool knobs and info */
 269         bool rx_csum;           /* BE card must perform rx-checksumming */
 270         u32 max_rx_coal;
 271         char fw_ver[FW_VER_LEN];
 272         u32 if_handle;          /* Used to configure filtering */
 273         u32 pmac_id;            /* MAC addr handle used by BE card */
 274
 275         struct be_link_info link;
 276         u32 port_num;
 277 };
 278
 279 extern struct ethtool_ops be_ethtool_ops;
 280
 281 #define drvr_stats(adapter)             (&adapter->stats.drvr_stats)
 282
 283 #define BE_SET_NETDEV_OPS(netdev, ops)  (netdev->netdev_ops = ops)
 284
 285 #define PAGE_SHIFT_4K           12
 286 #define PAGE_SIZE_4K            (1 << PAGE_SHIFT_4K)
 287
 288 /* Returns number of pages spanned by the data starting at the given addr */
 289 #define PAGES_4K_SPANNED(_address, size)                                \
 290                 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
 291                         (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
 292
 293 /* Byte offset into the page corresponding to given address */
 294 #define OFFSET_IN_PAGE(addr)                                            \
 295                  ((size_t)(addr) & (PAGE_SIZE_4K-1))
 296
 297 /* Returns bit offset within a DWORD of a bitfield */
 298 #define AMAP_BIT_OFFSET(_struct, field)                                 \
 299                 (((size_t)&(((_struct *)0)->field))%32)
 300
 301 /* Returns the bit mask of the field that is NOT shifted into location. */
 302 static inline u32 amap_mask(u32 bitsize)
 303 {
 304         return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
 305 }
 306
 307 static inline void
 308 amap_set(void *ptr, u32 dw_offset, u32 mask, u32 offset, u32 value)
 309 {
 310         u32 *dw = (u32 *) ptr + dw_offset;
 311         *dw &= ~(mask << offset);
 312         *dw |= (mask & value) << offset;
 313 }
 314
 315 #define AMAP_SET_BITS(_struct, field, ptr, val)                         \
 316                 amap_set(ptr,                                           \
 317                         offsetof(_struct, field)/32,                    \
 318                         amap_mask(sizeof(((_struct *)0)->field)),       \
 319                         AMAP_BIT_OFFSET(_struct, field),                \
 320                         val)
 321
 322 static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
 323 {
 324         u32 *dw = (u32 *) ptr;
 325         return mask & (*(dw + dw_offset) >> offset);
 326 }
 327
 328 #define AMAP_GET_BITS(_struct, field, ptr)                              \
 329                 amap_get(ptr,                                           \
 330                         offsetof(_struct, field)/32,                    \
 331                         amap_mask(sizeof(((_struct *)0)->field)),       \
 332                         AMAP_BIT_OFFSET(_struct, field))
 333
 334 #define be_dws_cpu_to_le(wrb, len)      swap_dws(wrb, len)
 335 #define be_dws_le_to_cpu(wrb, len)      swap_dws(wrb, len)
 336 static inline void swap_dws(void *wrb, int len)
 337 {
 338 #ifdef __BIG_ENDIAN
 339         u32 *dw = wrb;
 340         BUG_ON(len % 4);
 341         do {
 342                 *dw = cpu_to_le32(*dw);
 343                 dw++;
 344                 len -= 4;
 345         } while (len);
 346 #endif                          /* __BIG_ENDIAN */
 347 }
 348
 349 static inline u8 is_tcp_pkt(struct sk_buff *skb)
 350 {
 351         u8 val = 0;
 352
 353         if (ip_hdr(skb)->version == 4)
 354                 val = (ip_hdr(skb)->protocol == IPPROTO_TCP);
 355         else if (ip_hdr(skb)->version == 6)
 356                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP);
 357
 358         return val;
 359 }
 360
 361 static inline u8 is_udp_pkt(struct sk_buff *skb)
 362 {
 363         u8 val = 0;
 364
 365         if (ip_hdr(skb)->version == 4)
 366                 val = (ip_hdr(skb)->protocol == IPPROTO_UDP);
 367         else if (ip_hdr(skb)->version == 6)
 368                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP);
 369
 370         return val;
 371 }
 372
 373 extern void be_cq_notify(struct be_ctrl_info *ctrl, u16 qid, bool arm,
 374                 u16 num_popped);
 375 #endif                          /* BE_H */