drivers/net/vmxnet3/vmxnet3_int.h

   1 /*
   2  * Linux driver for VMware's vmxnet3 ethernet NIC.
   3  *
   4  * Copyright (C) 2008-2020, 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: 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   "1.5.0.0-k"
  73
  74 /* Each byte of this 32-bit integer encodes a version number in
  75  * VMXNET3_DRIVER_VERSION_STRING.
  76  */
  77 #define VMXNET3_DRIVER_VERSION_NUM      0x01050000
  78
  79 #if defined(CONFIG_PCI_MSI)
  80         /* RSS only makes sense if MSI-X is supported. */
  81         #define VMXNET3_RSS
  82 #endif
  83
  84 #define VMXNET3_REV_4           3       /* Vmxnet3 Rev. 4 */
  85 #define VMXNET3_REV_3           2       /* Vmxnet3 Rev. 3 */
  86 #define VMXNET3_REV_2           1       /* Vmxnet3 Rev. 2 */
  87 #define VMXNET3_REV_1           0       /* Vmxnet3 Rev. 1 */
  88
  89 /*
  90  * Capabilities
  91  */
  92
  93 enum {
  94         VMNET_CAP_SG            = 0x0001, /* Can do scatter-gather transmits. */
  95         VMNET_CAP_IP4_CSUM      = 0x0002, /* Can checksum only TCP/UDP over
  96                                            * IPv4 */
  97         VMNET_CAP_HW_CSUM       = 0x0004, /* Can checksum all packets. */
  98         VMNET_CAP_HIGH_DMA      = 0x0008, /* Can DMA to high memory. */
  99         VMNET_CAP_TOE           = 0x0010, /* Supports TCP/IP offload. */
 100         VMNET_CAP_TSO           = 0x0020, /* Supports TCP Segmentation
 101                                            * offload */
 102         VMNET_CAP_SW_TSO        = 0x0040, /* Supports SW TCP Segmentation */
 103         VMNET_CAP_VMXNET_APROM  = 0x0080, /* Vmxnet APROM support */
 104         VMNET_CAP_HW_TX_VLAN    = 0x0100, /* Can we do VLAN tagging in HW */
 105         VMNET_CAP_HW_RX_VLAN    = 0x0200, /* Can we do VLAN untagging in HW */
 106         VMNET_CAP_SW_VLAN       = 0x0400, /* VLAN tagging/untagging in SW */
 107         VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
 108         VMNET_CAP_ENABLE_INT_INLINE = 0x1000,  /* Enable Interrupt Inline */
 109         VMNET_CAP_ENABLE_HEADER_COPY = 0x2000,  /* copy header for vmkernel */
 110         VMNET_CAP_TX_CHAIN      = 0x4000, /* Guest can use multiple tx entries
 111                                           * for a pkt */
 112         VMNET_CAP_RX_CHAIN      = 0x8000, /* pkt can span multiple rx entries */
 113         VMNET_CAP_LPD           = 0x10000, /* large pkt delivery */
 114         VMNET_CAP_BPF           = 0x20000, /* BPF Support in VMXNET Virtual HW*/
 115         VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
 116                                            /* pages transmits */
 117         VMNET_CAP_IP6_CSUM      = 0x80000, /* Can do IPv6 csum offload. */
 118         VMNET_CAP_TSO6         = 0x100000, /* TSO seg. offload for IPv6 pkts. */
 119         VMNET_CAP_TSO256k      = 0x200000, /* Can do TSO seg offload for */
 120                                            /* pkts up to 256kB. */
 121         VMNET_CAP_UPT          = 0x400000  /* Support UPT */
 122 };
 123
 124 /*
 125  * Maximum devices supported.
 126  */
 127 #define MAX_ETHERNET_CARDS              10
 128 #define MAX_PCI_PASSTHRU_DEVICE         6
 129
 130 struct vmxnet3_cmd_ring {
 131         union Vmxnet3_GenericDesc *base;
 132         u32             size;
 133         u32             next2fill;
 134         u32             next2comp;
 135         u8              gen;
 136         dma_addr_t      basePA;
 137 };
 138
 139 static inline void
 140 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
 141 {
 142         ring->next2fill++;
 143         if (unlikely(ring->next2fill == ring->size)) {
 144                 ring->next2fill = 0;
 145                 VMXNET3_FLIP_RING_GEN(ring->gen);
 146         }
 147 }
 148
 149 static inline void
 150 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
 151 {
 152         VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
 153 }
 154
 155 static inline int
 156 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
 157 {
 158         return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
 159                 ring->next2comp - ring->next2fill - 1;
 160 }
 161
 162 struct vmxnet3_comp_ring {
 163         union Vmxnet3_GenericDesc *base;
 164         u32               size;
 165         u32               next2proc;
 166         u8                gen;
 167         u8                intr_idx;
 168         dma_addr_t           basePA;
 169 };
 170
 171 static inline void
 172 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
 173 {
 174         ring->next2proc++;
 175         if (unlikely(ring->next2proc == ring->size)) {
 176                 ring->next2proc = 0;
 177                 VMXNET3_FLIP_RING_GEN(ring->gen);
 178         }
 179 }
 180
 181 struct vmxnet3_tx_data_ring {
 182         struct Vmxnet3_TxDataDesc *base;
 183         u32              size;
 184         dma_addr_t          basePA;
 185 };
 186
 187 enum vmxnet3_buf_map_type {
 188         VMXNET3_MAP_INVALID = 0,
 189         VMXNET3_MAP_NONE,
 190         VMXNET3_MAP_SINGLE,
 191         VMXNET3_MAP_PAGE,
 192 };
 193
 194 struct vmxnet3_tx_buf_info {
 195         u32      map_type;
 196         u16      len;
 197         u16      sop_idx;
 198         dma_addr_t  dma_addr;
 199         struct sk_buff *skb;
 200 };
 201
 202 struct vmxnet3_tq_driver_stats {
 203         u64 drop_total;     /* # of pkts dropped by the driver, the
 204                                 * counters below track droppings due to
 205                                 * different reasons
 206                                 */
 207         u64 drop_too_many_frags;
 208         u64 drop_oversized_hdr;
 209         u64 drop_hdr_inspect_err;
 210         u64 drop_tso;
 211
 212         u64 tx_ring_full;
 213         u64 linearized;         /* # of pkts linearized */
 214         u64 copy_skb_header;    /* # of times we have to copy skb header */
 215         u64 oversized_hdr;
 216 };
 217
 218 struct vmxnet3_tx_ctx {
 219         bool   ipv4;
 220         bool   ipv6;
 221         u16 mss;
 222         u32    l4_offset;       /* only valid for pkts requesting tso or csum
 223                                  * offloading. For encap offload, it refers to
 224                                  * inner L4 offset i.e. it includes outer header
 225                                  * encap header and inner eth and ip header size
 226                                  */
 227
 228         u32     l4_hdr_size;    /* only valid if mss != 0
 229                                  * Refers to inner L4 hdr size for encap
 230                                  * offload
 231                                  */
 232         u32 copy_size;       /* # of bytes copied into the data ring */
 233         union Vmxnet3_GenericDesc *sop_txd;
 234         union Vmxnet3_GenericDesc *eop_txd;
 235 };
 236
 237 struct vmxnet3_tx_queue {
 238         char                    name[IFNAMSIZ+8]; /* To identify interrupt */
 239         struct vmxnet3_adapter          *adapter;
 240         spinlock_t                      tx_lock;
 241         struct vmxnet3_cmd_ring         tx_ring;
 242         struct vmxnet3_tx_buf_info      *buf_info;
 243         dma_addr_t                       buf_info_pa;
 244         struct vmxnet3_tx_data_ring     data_ring;
 245         struct vmxnet3_comp_ring        comp_ring;
 246         struct Vmxnet3_TxQueueCtrl      *shared;
 247         struct vmxnet3_tq_driver_stats  stats;
 248         bool                            stopped;
 249         int                             num_stop;  /* # of times the queue is
 250                                                     * stopped */
 251         int                             qid;
 252         u16                             txdata_desc_size;
 253 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 254
 255 enum vmxnet3_rx_buf_type {
 256         VMXNET3_RX_BUF_NONE = 0,
 257         VMXNET3_RX_BUF_SKB = 1,
 258         VMXNET3_RX_BUF_PAGE = 2
 259 };
 260
 261 struct vmxnet3_rx_buf_info {
 262         enum vmxnet3_rx_buf_type buf_type;
 263         u16     len;
 264         union {
 265                 struct sk_buff *skb;
 266                 struct page    *page;
 267         };
 268         dma_addr_t dma_addr;
 269 };
 270
 271 struct vmxnet3_rx_ctx {
 272         struct sk_buff *skb;
 273         u32 sop_idx;
 274 };
 275
 276 struct vmxnet3_rq_driver_stats {
 277         u64 drop_total;
 278         u64 drop_err;
 279         u64 drop_fcs;
 280         u64 rx_buf_alloc_failure;
 281 };
 282
 283 struct vmxnet3_rx_data_ring {
 284         Vmxnet3_RxDataDesc *base;
 285         dma_addr_t basePA;
 286         u16 desc_size;
 287 };
 288
 289 struct vmxnet3_rx_queue {
 290         char                    name[IFNAMSIZ + 8]; /* To identify interrupt */
 291         struct vmxnet3_adapter    *adapter;
 292         struct napi_struct        napi;
 293         struct vmxnet3_cmd_ring   rx_ring[2];
 294         struct vmxnet3_rx_data_ring data_ring;
 295         struct vmxnet3_comp_ring  comp_ring;
 296         struct vmxnet3_rx_ctx     rx_ctx;
 297         u32 qid;            /* rqID in RCD for buffer from 1st ring */
 298         u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
 299         u32 dataRingQid;    /* rqID in RCD for buffer from data ring */
 300         struct vmxnet3_rx_buf_info     *buf_info[2];
 301         dma_addr_t                      buf_info_pa;
 302         struct Vmxnet3_RxQueueCtrl            *shared;
 303         struct vmxnet3_rq_driver_stats  stats;
 304 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 305
 306 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8
 307 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8   /* Keep this value as a power of 2 */
 308
 309 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */
 310 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4)
 311
 312 #define VMXNET3_LINUX_MAX_MSIX_VECT     (VMXNET3_DEVICE_MAX_TX_QUEUES + \
 313                                          VMXNET3_DEVICE_MAX_RX_QUEUES + 1)
 314 #define VMXNET3_LINUX_MIN_MSIX_VECT     2 /* 1 for tx-rx pair and 1 for event */
 315
 316
 317 struct vmxnet3_intr {
 318         enum vmxnet3_intr_mask_mode  mask_mode;
 319         enum vmxnet3_intr_type       type;      /* MSI-X, MSI, or INTx? */
 320         u8  num_intrs;                  /* # of intr vectors */
 321         u8  event_intr_idx;             /* idx of the intr vector for event */
 322         u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
 323         char    event_msi_vector_name[IFNAMSIZ+17];
 324 #ifdef CONFIG_PCI_MSI
 325         struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 326 #endif
 327 };
 328
 329 /* Interrupt sharing schemes, share_intr */
 330 #define VMXNET3_INTR_BUDDYSHARE 0    /* Corresponding tx,rx queues share irq */
 331 #define VMXNET3_INTR_TXSHARE 1       /* All tx queues share one irq */
 332 #define VMXNET3_INTR_DONTSHARE 2     /* each queue has its own irq */
 333
 334
 335 #define VMXNET3_STATE_BIT_RESETTING   0
 336 #define VMXNET3_STATE_BIT_QUIESCED    1
 337 struct vmxnet3_adapter {
 338         struct vmxnet3_tx_queue         tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES];
 339         struct vmxnet3_rx_queue         rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
 340         unsigned long                   active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 341         struct vmxnet3_intr             intr;
 342         spinlock_t                      cmd_lock;
 343         struct Vmxnet3_DriverShared     *shared;
 344         struct Vmxnet3_PMConf           *pm_conf;
 345         struct Vmxnet3_TxQueueDesc      *tqd_start;     /* all tx queue desc */
 346         struct Vmxnet3_RxQueueDesc      *rqd_start;     /* all rx queue desc */
 347         struct net_device               *netdev;
 348         struct pci_dev                  *pdev;
 349
 350         u8                      __iomem *hw_addr0; /* for BAR 0 */
 351         u8                      __iomem *hw_addr1; /* for BAR 1 */
 352         u8                              version;
 353
 354 #ifdef VMXNET3_RSS
 355         struct UPT1_RSSConf             *rss_conf;
 356         bool                            rss;
 357 #endif
 358         u32                             num_rx_queues;
 359         u32                             num_tx_queues;
 360
 361         /* rx buffer related */
 362         unsigned                        skb_buf_size;
 363         int             rx_buf_per_pkt;  /* only apply to the 1st ring */
 364         dma_addr_t                      shared_pa;
 365         dma_addr_t queue_desc_pa;
 366         dma_addr_t coal_conf_pa;
 367
 368         /* Wake-on-LAN */
 369         u32     wol;
 370
 371         /* Link speed */
 372         u32     link_speed; /* in mbps */
 373
 374         u64     tx_timeout_count;
 375
 376         /* Ring sizes */
 377         u32 tx_ring_size;
 378         u32 rx_ring_size;
 379         u32 rx_ring2_size;
 380
 381         /* Size of buffer in the data ring */
 382         u16 txdata_desc_size;
 383         u16 rxdata_desc_size;
 384
 385         bool rxdataring_enabled;
 386         bool default_rss_fields;
 387         enum Vmxnet3_RSSField rss_fields;
 388
 389         struct work_struct work;
 390
 391         unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */
 392
 393         int share_intr;
 394
 395         struct Vmxnet3_CoalesceScheme *coal_conf;
 396         bool   default_coal_mode;
 397
 398         dma_addr_t adapter_pa;
 399         dma_addr_t pm_conf_pa;
 400         dma_addr_t rss_conf_pa;
 401 };
 402
 403 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
 404         writel((val), (adapter)->hw_addr0 + (reg))
 405 #define VMXNET3_READ_BAR0_REG(adapter, reg)        \
 406         readl((adapter)->hw_addr0 + (reg))
 407
 408 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
 409         writel((val), (adapter)->hw_addr1 + (reg))
 410 #define VMXNET3_READ_BAR1_REG(adapter, reg)        \
 411         readl((adapter)->hw_addr1 + (reg))
 412
 413 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
 414 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
 415         ((rq)->rx_ring[ring_idx].size >> 3)
 416
 417 #define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
 418 #define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))
 419
 420 #define VMXNET3_VERSION_GE_2(adapter) \
 421         (adapter->version >= VMXNET3_REV_2 + 1)
 422 #define VMXNET3_VERSION_GE_3(adapter) \
 423         (adapter->version >= VMXNET3_REV_3 + 1)
 424 #define VMXNET3_VERSION_GE_4(adapter) \
 425         (adapter->version >= VMXNET3_REV_4 + 1)
 426
 427 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
 428 #define VMXNET3_DEF_TX_RING_SIZE    512
 429 #define VMXNET3_DEF_RX_RING_SIZE    1024
 430 #define VMXNET3_DEF_RX_RING2_SIZE   256
 431
 432 #define VMXNET3_DEF_RXDATA_DESC_SIZE 128
 433
 434 #define VMXNET3_MAX_ETH_HDR_SIZE    22
 435 #define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)
 436
 437 #define VMXNET3_GET_RING_IDX(adapter, rqID)             \
 438         ((rqID >= adapter->num_rx_queues &&             \
 439          rqID < 2 * adapter->num_rx_queues) ? 1 : 0)    \
 440
 441 #define VMXNET3_RX_DATA_RING(adapter, rqID)             \
 442         (rqID >= 2 * adapter->num_rx_queues &&          \
 443         rqID < 3 * adapter->num_rx_queues)              \
 444
 445 #define VMXNET3_COAL_STATIC_DEFAULT_DEPTH       64
 446
 447 #define VMXNET3_COAL_RBC_RATE(usecs) (1000000 / usecs)
 448 #define VMXNET3_COAL_RBC_USECS(rbc_rate) (1000000 / rbc_rate)
 449 #define VMXNET3_RSS_FIELDS_DEFAULT (VMXNET3_RSS_FIELDS_TCPIP4 | \
 450                                     VMXNET3_RSS_FIELDS_TCPIP6)
 451
 452 int
 453 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);
 454
 455 int
 456 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);
 457
 458 void
 459 vmxnet3_force_close(struct vmxnet3_adapter *adapter);
 460
 461 void
 462 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);
 463
 464 void
 465 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter);
 466
 467 void
 468 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter);
 469
 470 netdev_features_t
 471 vmxnet3_fix_features(struct net_device *netdev, netdev_features_t features);
 472
 473 netdev_features_t
 474 vmxnet3_features_check(struct sk_buff *skb,
 475                        struct net_device *netdev, netdev_features_t features);
 476
 477 int
 478 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features);
 479
 480 int
 481 vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
 482                       u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size,
 483                       u16 txdata_desc_size, u16 rxdata_desc_size);
 484
 485 void vmxnet3_set_ethtool_ops(struct net_device *netdev);
 486
 487 void vmxnet3_get_stats64(struct net_device *dev,
 488                          struct rtnl_link_stats64 *stats);
 489
 490 extern char vmxnet3_driver_name[];
 491 #endif