drivers/net/vmxnet3/vmxnet3_int.h

   1 /*
   2  * Linux driver for VMware's vmxnet3 ethernet NIC.
   3  *
   4  * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; version 2 of the License and no later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  * NON INFRINGEMENT.  See the GNU General Public License for more
  14  * details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * The full GNU General Public License is included in this distribution in
  21  * the file called "COPYING".
  22  *
  23  * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
  24  *
  25  */
  26
  27 #ifndef _VMXNET3_INT_H
  28 #define _VMXNET3_INT_H
  29
  30 #include <linux/bitops.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/delay.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/pci.h>
  35 #include <linux/compiler.h>
  36 #include <linux/slab.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/ioport.h>
  39 #include <linux/highmem.h>
  40 #include <linux/timer.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/workqueue.h>
  44 #include <linux/uaccess.h>
  45 #include <asm/dma.h>
  46 #include <asm/page.h>
  47
  48 #include <linux/tcp.h>
  49 #include <linux/udp.h>
  50 #include <linux/ip.h>
  51 #include <linux/ipv6.h>
  52 #include <linux/in.h>
  53 #include <linux/etherdevice.h>
  54 #include <asm/checksum.h>
  55 #include <linux/if_vlan.h>
  56 #include <linux/if_arp.h>
  57 #include <linux/inetdevice.h>
  58 #include <linux/log2.h>
  59
  60 #include "vmxnet3_defs.h"
  61
  62 #ifdef DEBUG
  63 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)"
  64 #else
  65 # define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI"
  66 #endif
  67
  68
  69 /*
  70  * Version numbers
  71  */
  72 #define VMXNET3_DRIVER_VERSION_STRING   "1.3.4.0-k"
  73
  74 /* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
  75 #define VMXNET3_DRIVER_VERSION_NUM      0x01030400
  76
  77 #if defined(CONFIG_PCI_MSI)
  78         /* RSS only makes sense if MSI-X is supported. */
  79         #define VMXNET3_RSS
  80 #endif
  81
  82 /*
  83  * Capabilities
  84  */
  85
  86 enum {
  87         VMNET_CAP_SG            = 0x0001, /* Can do scatter-gather transmits. */
  88         VMNET_CAP_IP4_CSUM      = 0x0002, /* Can checksum only TCP/UDP over
  89                                            * IPv4 */
  90         VMNET_CAP_HW_CSUM       = 0x0004, /* Can checksum all packets. */
  91         VMNET_CAP_HIGH_DMA      = 0x0008, /* Can DMA to high memory. */
  92         VMNET_CAP_TOE           = 0x0010, /* Supports TCP/IP offload. */
  93         VMNET_CAP_TSO           = 0x0020, /* Supports TCP Segmentation
  94                                            * offload */
  95         VMNET_CAP_SW_TSO        = 0x0040, /* Supports SW TCP Segmentation */
  96         VMNET_CAP_VMXNET_APROM  = 0x0080, /* Vmxnet APROM support */
  97         VMNET_CAP_HW_TX_VLAN    = 0x0100, /* Can we do VLAN tagging in HW */
  98         VMNET_CAP_HW_RX_VLAN    = 0x0200, /* Can we do VLAN untagging in HW */
  99         VMNET_CAP_SW_VLAN       = 0x0400, /* VLAN tagging/untagging in SW */
 100         VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
 101         VMNET_CAP_ENABLE_INT_INLINE = 0x1000,  /* Enable Interrupt Inline */
 102         VMNET_CAP_ENABLE_HEADER_COPY = 0x2000,  /* copy header for vmkernel */
 103         VMNET_CAP_TX_CHAIN      = 0x4000, /* Guest can use multiple tx entries
 104                                           * for a pkt */
 105         VMNET_CAP_RX_CHAIN      = 0x8000, /* pkt can span multiple rx entries */
 106         VMNET_CAP_LPD           = 0x10000, /* large pkt delivery */
 107         VMNET_CAP_BPF           = 0x20000, /* BPF Support in VMXNET Virtual HW*/
 108         VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
 109                                            /* pages transmits */
 110         VMNET_CAP_IP6_CSUM      = 0x80000, /* Can do IPv6 csum offload. */
 111         VMNET_CAP_TSO6         = 0x100000, /* TSO seg. offload for IPv6 pkts. */
 112         VMNET_CAP_TSO256k      = 0x200000, /* Can do TSO seg offload for */
 113                                            /* pkts up to 256kB. */
 114         VMNET_CAP_UPT          = 0x400000  /* Support UPT */
 115 };
 116
 117 /*
 118  * PCI vendor and device IDs.
 119  */
 120 #define PCI_DEVICE_ID_VMWARE_VMXNET3    0x07B0
 121 #define MAX_ETHERNET_CARDS              10
 122 #define MAX_PCI_PASSTHRU_DEVICE         6
 123
 124 struct vmxnet3_cmd_ring {
 125         union Vmxnet3_GenericDesc *base;
 126         u32             size;
 127         u32             next2fill;
 128         u32             next2comp;
 129         u8              gen;
 130         dma_addr_t      basePA;
 131 };
 132
 133 static inline void
 134 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
 135 {
 136         ring->next2fill++;
 137         if (unlikely(ring->next2fill == ring->size)) {
 138                 ring->next2fill = 0;
 139                 VMXNET3_FLIP_RING_GEN(ring->gen);
 140         }
 141 }
 142
 143 static inline void
 144 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
 145 {
 146         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
 147 }
 148
 149 static inline int
 150 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
 151 {
 152         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
 153                 ring->next2comp - ring->next2fill - 1;
 154 }
 155
 156 struct vmxnet3_comp_ring {
 157         union Vmxnet3_GenericDesc *base;
 158         u32               size;
 159         u32               next2proc;
 160         u8                gen;
 161         u8                intr_idx;
 162         dma_addr_t           basePA;
 163 };
 164
 165 static inline void
 166 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 167 {
 168         ring->next2proc++;
 169         if (unlikely(ring->next2proc == ring->size)) {
 170                 ring->next2proc = 0;
 171                 VMXNET3_FLIP_RING_GEN(ring->gen);
 172         }
 173 }
 174
 175 struct vmxnet3_tx_data_ring {
 176         struct Vmxnet3_TxDataDesc *base;
 177         u32              size;
 178         dma_addr_t          basePA;
 179 };
 180
 181 enum vmxnet3_buf_map_type {
 182         VMXNET3_MAP_INVALID = 0,
 183         VMXNET3_MAP_NONE,
 184         VMXNET3_MAP_SINGLE,
 185         VMXNET3_MAP_PAGE,
 186 };
 187
 188 struct vmxnet3_tx_buf_info {
 189         u32      map_type;
 190         u16      len;
 191         u16      sop_idx;
 192         dma_addr_t  dma_addr;
 193         struct sk_buff *skb;
 194 };
 195
 196 struct vmxnet3_tq_driver_stats {
 197         u64 drop_total;     /* # of pkts dropped by the driver, the
 198                                 * counters below track droppings due to
 199                                 * different reasons
 200                                 */
 201         u64 drop_too_many_frags;
 202         u64 drop_oversized_hdr;
 203         u64 drop_hdr_inspect_err;
 204         u64 drop_tso;
 205
 206         u64 tx_ring_full;
 207         u64 linearized;         /* # of pkts linearized */
 208         u64 copy_skb_header;    /* # of times we have to copy skb header */
 209         u64 oversized_hdr;
 210 };
 211
 212 struct vmxnet3_tx_ctx {
 213         bool   ipv4;
 214         u16 mss;
 215         u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
 216                                  * offloading
 217                                  */
 218         u32 l4_hdr_size;     /* only valid if mss != 0 */
 219         u32 copy_size;       /* # of bytes copied into the data ring */
 220         union Vmxnet3_GenericDesc *sop_txd;
 221         union Vmxnet3_GenericDesc *eop_txd;
 222 };
 223
 224 struct vmxnet3_tx_queue {
 225         char                    name[IFNAMSIZ+8]; /* To identify interrupt */
 226         struct vmxnet3_adapter          *adapter;
 227         spinlock_t                      tx_lock;
 228         struct vmxnet3_cmd_ring         tx_ring;
 229         struct vmxnet3_tx_buf_info      *buf_info;
 230         dma_addr_t                       buf_info_pa;
 231         struct vmxnet3_tx_data_ring     data_ring;
 232         struct vmxnet3_comp_ring        comp_ring;
 233         struct Vmxnet3_TxQueueCtrl      *shared;
 234         struct vmxnet3_tq_driver_stats  stats;
 235         bool                            stopped;
 236         int                             num_stop;  /* # of times the queue is
 237                                                     * stopped */
 238         int                             qid;
 239 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 240
 241 enum vmxnet3_rx_buf_type {
 242         VMXNET3_RX_BUF_NONE = 0,
 243         VMXNET3_RX_BUF_SKB = 1,
 244         VMXNET3_RX_BUF_PAGE = 2
 245 };
 246
 247 struct vmxnet3_rx_buf_info {
 248         enum vmxnet3_rx_buf_type buf_type;
 249         u16     len;
 250         union {
 251                 struct sk_buff *skb;
 252                 struct page    *page;
 253         };
 254         dma_addr_t dma_addr;
 255 };
 256
 257 struct vmxnet3_rx_ctx {
 258         struct sk_buff *skb;
 259         u32 sop_idx;
 260 };
 261
 262 struct vmxnet3_rq_driver_stats {
 263         u64 drop_total;
 264         u64 drop_err;
 265         u64 drop_fcs;
 266         u64 rx_buf_alloc_failure;
 267 };
 268
 269 struct vmxnet3_rx_queue {
 270         char                    name[IFNAMSIZ + 8]; /* To identify interrupt */
 271         struct vmxnet3_adapter    *adapter;
 272         struct napi_struct        napi;
 273         struct vmxnet3_cmd_ring   rx_ring[2];
 274         struct vmxnet3_comp_ring  comp_ring;
 275         struct vmxnet3_rx_ctx     rx_ctx;
 276         u32 qid;            /* rqID in RCD for buffer from 1st ring */
 277         u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
 278         struct vmxnet3_rx_buf_info     *buf_info[2];
 279         dma_addr_t                      buf_info_pa;
 280         struct Vmxnet3_RxQueueCtrl            *shared;
 281         struct vmxnet3_rq_driver_stats  stats;
 282 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 283
 284 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 285 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */
 286
 287 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 288 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
 289
 290 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 291                                          VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 292 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */
 293
 294
 295 struct vmxnet3_intr {
 296         enum vmxnet3_intr_mask_mode  mask_mode;
 297         enum vmxnet3_intr_type       type;      /* MSI-X, MSI, or INTx? */
 298         u8  num_intrs;                  /* # of intr vectors */
 299         u8  event_intr_idx;             /* idx of the intr vector for event */
 300         u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
 301         char    event_msi_vector_name[IFNAMSIZ+11];
 302 #ifdef CONFIG_PCI_MSI
 303         struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 304 #endif
 305 };
 306
 307 /* Interrupt sharing schemes, share_intr */
 308 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 309 #define VMXNET3_INTR_TXSHARE 1       /* All tx queues share one irq */
 310 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */
 311
 312
 313 #define VMXNET3_STATE_BIT_RESETTING   0
 314 #define VMXNET3_STATE_BIT_QUIESCED    1
 315 struct vmxnet3_adapter {
 316         struct vmxnet3_tx_queue         tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 317         struct vmxnet3_rx_queue         rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 318         unsigned long                   active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 319         struct vmxnet3_intr             intr;
 320         spinlock_t                      cmd_lock;
 321         struct Vmxnet3_DriverShared     *shared;
 322         struct Vmxnet3_PMConf           *pm_conf;
 323         struct Vmxnet3_TxQueueDesc      *tqd_start;     /* all tx queue desc */
 324         struct Vmxnet3_RxQueueDesc      *rqd_start;     /* all rx queue desc */
 325         struct net_device               *netdev;
 326         struct pci_dev                  *pdev;
 327
 328         u8                      __iomem *hw_addr0; /* for BAR 0 */
 329         u8                      __iomem *hw_addr1; /* for BAR 1 */
 330
 331 #ifdef VMXNET3_RSS
 332         struct UPT1_RSSConf             *rss_conf;
 333         bool                            rss;
 334 #endif
 335         u32                             num_rx_queues;
 336         u32                             num_tx_queues;
 337
 338         /* rx buffer related */
 339         unsigned                        skb_buf_size;
 340         int             rx_buf_per_pkt;  /* only apply to the 1st ring */
 341         dma_addr_t                      shared_pa;
 342         dma_addr_t queue_desc_pa;
 343
 344         /* Wake-on-LAN */
 345         u32     wol;
 346
 347         /* Link speed */
 348         u32     link_speed; /* in mbps */
 349
 350         u64     tx_timeout_count;
 351
 352         /* Ring sizes */
 353         u32 tx_ring_size;
 354         u32 rx_ring_size;
 355         u32 rx_ring2_size;
 356
 357         struct work_struct work;
 358
 359         unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */
 360
 361         int share_intr;
 362
 363         dma_addr_t adapter_pa;
 364         dma_addr_t pm_conf_pa;
 365         dma_addr_t rss_conf_pa;
 366 };
 367
 368 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
 369         writel((val), (adapter)->hw_addr0 + (reg))
 370 #define VMXNET3_READ_BAR0_REG(adapter, reg)        \
 371         readl((adapter)->hw_addr0 + (reg))
 372
 373 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
 374         writel((val), (adapter)->hw_addr1 + (reg))
 375 #define VMXNET3_READ_BAR1_REG(adapter, reg)        \
 376         readl((adapter)->hw_addr1 + (reg))
 377
 378 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
 379 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
 380         ((rq)->rx_ring[ring_idx].size >> 3)
 381
 382 #define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
 383 #define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))
 384
 385 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
 386 #define VMXNET3_DEF_TX_RING_SIZE    512
 387 #define VMXNET3_DEF_RX_RING_SIZE    256
 388 #define VMXNET3_DEF_RX_RING2_SIZE   128
 389
 390 #define VMXNET3_MAX_ETH_HDR_SIZE    22
 391 #define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)
 392
 393 int
 394 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
 395
 396 int
 397 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
 398
 399 void
 400 vmxnet3_force_close(struct vmxnet3_adapter *adapter);
 401
 402 void
 403 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
 404
 405 void
 406 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
 407
 408 void
 409 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
 410
 411 int
 412 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
 413
 414 int
 415 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 416                       u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);
 417
 418 void vmxnet3_set_ethtool_ops(struct net_device *netdev);
 419
 420 struct rtnl_link_stats64 *
 421 vmxnet3_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
 422
 423 extern char vmxnet3_driver_name[];
 424 #endif