1 /* 2 * Linux driver for VMware's vmxnet3 ethernet NIC. 3 * 4 * Copyright (C) 2008-2016, 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 "1.4.16.0-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 0x01041000 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_3 2 /* Vmxnet3 Rev. 3 */ 85 #define VMXNET3_REV_2 1 /* Vmxnet3 Rev. 2 */ 86 #define VMXNET3_REV_1 0 /* Vmxnet3 Rev. 1 */ 87 88 /* 89 * Capabilities 90 */ 91 92 enum { 93 VMNET_CAP_SG = 0x0001, /* Can do scatter-gather transmits. */ 94 VMNET_CAP_IP4_CSUM = 0x0002, /* Can checksum only TCP/UDP over 95 * IPv4 */ 96 VMNET_CAP_HW_CSUM = 0x0004, /* Can checksum all packets. */ 97 VMNET_CAP_HIGH_DMA = 0x0008, /* Can DMA to high memory. */ 98 VMNET_CAP_TOE = 0x0010, /* Supports TCP/IP offload. */ 99 VMNET_CAP_TSO = 0x0020, /* Supports TCP Segmentation 100 * offload */ 101 VMNET_CAP_SW_TSO = 0x0040, /* Supports SW TCP Segmentation */ 102 VMNET_CAP_VMXNET_APROM = 0x0080, /* Vmxnet APROM support */ 103 VMNET_CAP_HW_TX_VLAN = 0x0100, /* Can we do VLAN tagging in HW */ 104 VMNET_CAP_HW_RX_VLAN = 0x0200, /* Can we do VLAN untagging in HW */ 105 VMNET_CAP_SW_VLAN = 0x0400, /* VLAN tagging/untagging in SW */ 106 VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */ 107 VMNET_CAP_ENABLE_INT_INLINE = 0x1000, /* Enable Interrupt Inline */ 108 VMNET_CAP_ENABLE_HEADER_COPY = 0x2000, /* copy header for vmkernel */ 109 VMNET_CAP_TX_CHAIN = 0x4000, /* Guest can use multiple tx entries 110 * for a pkt */ 111 VMNET_CAP_RX_CHAIN = 0x8000, /* pkt can span multiple rx entries */ 112 VMNET_CAP_LPD = 0x10000, /* large pkt delivery */ 113 VMNET_CAP_BPF = 0x20000, /* BPF Support in VMXNET Virtual HW*/ 114 VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/ 115 /* pages transmits */ 116 VMNET_CAP_IP6_CSUM = 0x80000, /* Can do IPv6 csum offload. */ 117 VMNET_CAP_TSO6 = 0x100000, /* TSO seg. offload for IPv6 pkts. */ 118 VMNET_CAP_TSO256k = 0x200000, /* Can do TSO seg offload for */ 119 /* pkts up to 256kB. */ 120 VMNET_CAP_UPT = 0x400000 /* Support UPT */ 121 }; 122 123 /* 124 * Maximum devices supported. 125 */ 126 #define MAX_ETHERNET_CARDS 10 127 #define MAX_PCI_PASSTHRU_DEVICE 6 128 129 struct vmxnet3_cmd_ring { 130 union Vmxnet3_GenericDesc *base; 131 u32 size; 132 u32 next2fill; 133 u32 next2comp; 134 u8 gen; 135 dma_addr_t basePA; 136 }; 137 138 static inline void 139 vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring) 140 { 141 ring->next2fill++; 142 if (unlikely(ring->next2fill == ring->size)) { 143 ring->next2fill = 0; 144 VMXNET3_FLIP_RING_GEN(ring->gen); 145 } 146 } 147 148 static inline void 149 vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring) 150 { 151 VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size); 152 } 153 154 static inline int 155 vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring) 156 { 157 return (ring->next2comp > ring->next2fill ? 0 : ring->size) + 158 ring->next2comp - ring->next2fill - 1; 159 } 160 161 struct vmxnet3_comp_ring { 162 union Vmxnet3_GenericDesc *base; 163 u32 size; 164 u32 next2proc; 165 u8 gen; 166 u8 intr_idx; 167 dma_addr_t basePA; 168 }; 169 170 static inline void 171 vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring) 172 { 173 ring->next2proc++; 174 if (unlikely(ring->next2proc == ring->size)) { 175 ring->next2proc = 0; 176 VMXNET3_FLIP_RING_GEN(ring->gen); 177 } 178 } 179 180 struct vmxnet3_tx_data_ring { 181 struct Vmxnet3_TxDataDesc *base; 182 u32 size; 183 dma_addr_t basePA; 184 }; 185 186 enum vmxnet3_buf_map_type { 187 VMXNET3_MAP_INVALID = 0, 188 VMXNET3_MAP_NONE, 189 VMXNET3_MAP_SINGLE, 190 VMXNET3_MAP_PAGE, 191 }; 192 193 struct vmxnet3_tx_buf_info { 194 u32 map_type; 195 u16 len; 196 u16 sop_idx; 197 dma_addr_t dma_addr; 198 struct sk_buff *skb; 199 }; 200 201 struct vmxnet3_tq_driver_stats { 202 u64 drop_total; /* # of pkts dropped by the driver, the 203 * counters below track droppings due to 204 * different reasons 205 */ 206 u64 drop_too_many_frags; 207 u64 drop_oversized_hdr; 208 u64 drop_hdr_inspect_err; 209 u64 drop_tso; 210 211 u64 tx_ring_full; 212 u64 linearized; /* # of pkts linearized */ 213 u64 copy_skb_header; /* # of times we have to copy skb header */ 214 u64 oversized_hdr; 215 }; 216 217 struct vmxnet3_tx_ctx { 218 bool ipv4; 219 bool ipv6; 220 u16 mss; 221 u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum 222 * offloading 223 */ 224 u32 l4_hdr_size; /* only valid if mss != 0 */ 225 u32 copy_size; /* # of bytes copied into the data ring */ 226 union Vmxnet3_GenericDesc *sop_txd; 227 union Vmxnet3_GenericDesc *eop_txd; 228 }; 229 230 struct vmxnet3_tx_queue { 231 char name[IFNAMSIZ+8]; /* To identify interrupt */ 232 struct vmxnet3_adapter *adapter; 233 spinlock_t tx_lock; 234 struct vmxnet3_cmd_ring tx_ring; 235 struct vmxnet3_tx_buf_info *buf_info; 236 dma_addr_t buf_info_pa; 237 struct vmxnet3_tx_data_ring data_ring; 238 struct vmxnet3_comp_ring comp_ring; 239 struct Vmxnet3_TxQueueCtrl *shared; 240 struct vmxnet3_tq_driver_stats stats; 241 bool stopped; 242 int num_stop; /* # of times the queue is 243 * stopped */ 244 int qid; 245 u16 txdata_desc_size; 246 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 247 248 enum vmxnet3_rx_buf_type { 249 VMXNET3_RX_BUF_NONE = 0, 250 VMXNET3_RX_BUF_SKB = 1, 251 VMXNET3_RX_BUF_PAGE = 2 252 }; 253 254 struct vmxnet3_rx_buf_info { 255 enum vmxnet3_rx_buf_type buf_type; 256 u16 len; 257 union { 258 struct sk_buff *skb; 259 struct page *page; 260 }; 261 dma_addr_t dma_addr; 262 }; 263 264 struct vmxnet3_rx_ctx { 265 struct sk_buff *skb; 266 u32 sop_idx; 267 }; 268 269 struct vmxnet3_rq_driver_stats { 270 u64 drop_total; 271 u64 drop_err; 272 u64 drop_fcs; 273 u64 rx_buf_alloc_failure; 274 }; 275 276 struct vmxnet3_rx_data_ring { 277 Vmxnet3_RxDataDesc *base; 278 dma_addr_t basePA; 279 u16 desc_size; 280 }; 281 282 struct vmxnet3_rx_queue { 283 char name[IFNAMSIZ + 8]; /* To identify interrupt */ 284 struct vmxnet3_adapter *adapter; 285 struct napi_struct napi; 286 struct vmxnet3_cmd_ring rx_ring[2]; 287 struct vmxnet3_rx_data_ring data_ring; 288 struct vmxnet3_comp_ring comp_ring; 289 struct vmxnet3_rx_ctx rx_ctx; 290 u32 qid; /* rqID in RCD for buffer from 1st ring */ 291 u32 qid2; /* rqID in RCD for buffer from 2nd ring */ 292 u32 dataRingQid; /* rqID in RCD for buffer from data ring */ 293 struct vmxnet3_rx_buf_info *buf_info[2]; 294 dma_addr_t buf_info_pa; 295 struct Vmxnet3_RxQueueCtrl *shared; 296 struct vmxnet3_rq_driver_stats stats; 297 } __attribute__((__aligned__(SMP_CACHE_BYTES))); 298 299 #define VMXNET3_DEVICE_MAX_TX_QUEUES 8 300 #define VMXNET3_DEVICE_MAX_RX_QUEUES 8 /* Keep this value as a power of 2 */ 301 302 /* Should be less than UPT1_RSS_MAX_IND_TABLE_SIZE */ 303 #define VMXNET3_RSS_IND_TABLE_SIZE (VMXNET3_DEVICE_MAX_RX_QUEUES * 4) 304 305 #define VMXNET3_LINUX_MAX_MSIX_VECT (VMXNET3_DEVICE_MAX_TX_QUEUES + \ 306 VMXNET3_DEVICE_MAX_RX_QUEUES + 1) 307 #define VMXNET3_LINUX_MIN_MSIX_VECT 2 /* 1 for tx-rx pair and 1 for event */ 308 309 310 struct vmxnet3_intr { 311 enum vmxnet3_intr_mask_mode mask_mode; 312 enum vmxnet3_intr_type type; /* MSI-X, MSI, or INTx? */ 313 u8 num_intrs; /* # of intr vectors */ 314 u8 event_intr_idx; /* idx of the intr vector for event */ 315 u8 mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */ 316 char event_msi_vector_name[IFNAMSIZ+17]; 317 #ifdef CONFIG_PCI_MSI 318 struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT]; 319 #endif 320 }; 321 322 /* Interrupt sharing schemes, share_intr */ 323 #define VMXNET3_INTR_BUDDYSHARE 0 /* Corresponding tx,rx queues share irq */ 324 #define VMXNET3_INTR_TXSHARE 1 /* All tx queues share one irq */ 325 #define VMXNET3_INTR_DONTSHARE 2 /* each queue has its own irq */ 326 327 328 #define VMXNET3_STATE_BIT_RESETTING 0 329 #define VMXNET3_STATE_BIT_QUIESCED 1 330 struct vmxnet3_adapter { 331 struct vmxnet3_tx_queue tx_queue[VMXNET3_DEVICE_MAX_TX_QUEUES]; 332 struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES]; 333 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; 334 struct vmxnet3_intr intr; 335 spinlock_t cmd_lock; 336 struct Vmxnet3_DriverShared *shared; 337 struct Vmxnet3_PMConf *pm_conf; 338 struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */ 339 struct Vmxnet3_RxQueueDesc *rqd_start; /* all rx queue desc */ 340 struct net_device *netdev; 341 struct pci_dev *pdev; 342 343 u8 __iomem *hw_addr0; /* for BAR 0 */ 344 u8 __iomem *hw_addr1; /* for BAR 1 */ 345 u8 version; 346 347 #ifdef VMXNET3_RSS 348 struct UPT1_RSSConf *rss_conf; 349 bool rss; 350 #endif 351 u32 num_rx_queues; 352 u32 num_tx_queues; 353 354 /* rx buffer related */ 355 unsigned skb_buf_size; 356 int rx_buf_per_pkt; /* only apply to the 1st ring */ 357 dma_addr_t shared_pa; 358 dma_addr_t queue_desc_pa; 359 dma_addr_t coal_conf_pa; 360 361 /* Wake-on-LAN */ 362 u32 wol; 363 364 /* Link speed */ 365 u32 link_speed; /* in mbps */ 366 367 u64 tx_timeout_count; 368 369 /* Ring sizes */ 370 u32 tx_ring_size; 371 u32 rx_ring_size; 372 u32 rx_ring2_size; 373 374 /* Size of buffer in the data ring */ 375 u16 txdata_desc_size; 376 u16 rxdata_desc_size; 377 378 bool rxdataring_enabled; 379 380 struct work_struct work; 381 382 unsigned long state; /* VMXNET3_STATE_BIT_xxx */ 383 384 int share_intr; 385 386 struct Vmxnet3_CoalesceScheme *coal_conf; 387 bool default_coal_mode; 388 389 dma_addr_t adapter_pa; 390 dma_addr_t pm_conf_pa; 391 dma_addr_t rss_conf_pa; 392 }; 393 394 #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \ 395 writel((val), (adapter)->hw_addr0 + (reg)) 396 #define VMXNET3_READ_BAR0_REG(adapter, reg) \ 397 readl((adapter)->hw_addr0 + (reg)) 398 399 #define VMXNET3_WRITE_BAR1_REG(adapter, reg, val) \ 400 writel((val), (adapter)->hw_addr1 + (reg)) 401 #define VMXNET3_READ_BAR1_REG(adapter, reg) \ 402 readl((adapter)->hw_addr1 + (reg)) 403 404 #define VMXNET3_WAKE_QUEUE_THRESHOLD(tq) (5) 405 #define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \ 406 ((rq)->rx_ring[ring_idx].size >> 3) 407 408 #define VMXNET3_GET_ADDR_LO(dma) ((u32)(dma)) 409 #define VMXNET3_GET_ADDR_HI(dma) ((u32)(((u64)(dma)) >> 32)) 410 411 #define VMXNET3_VERSION_GE_2(adapter) \ 412 (adapter->version >= VMXNET3_REV_2 + 1) 413 #define VMXNET3_VERSION_GE_3(adapter) \ 414 (adapter->version >= VMXNET3_REV_3 + 1) 415 416 /* must be a multiple of VMXNET3_RING_SIZE_ALIGN */ 417 #define VMXNET3_DEF_TX_RING_SIZE 512 418 #define VMXNET3_DEF_RX_RING_SIZE 1024 419 #define VMXNET3_DEF_RX_RING2_SIZE 256 420 421 #define VMXNET3_DEF_RXDATA_DESC_SIZE 128 422 423 #define VMXNET3_MAX_ETH_HDR_SIZE 22 424 #define VMXNET3_MAX_SKB_BUF_SIZE (3*1024) 425 426 #define VMXNET3_GET_RING_IDX(adapter, rqID) \ 427 ((rqID >= adapter->num_rx_queues && \ 428 rqID < 2 * adapter->num_rx_queues) ? 1 : 0) \ 429 430 #define VMXNET3_RX_DATA_RING(adapter, rqID) \ 431 (rqID >= 2 * adapter->num_rx_queues && \ 432 rqID < 3 * adapter->num_rx_queues) \ 433 434 #define VMXNET3_COAL_STATIC_DEFAULT_DEPTH 64 435 436 #define VMXNET3_COAL_RBC_RATE(usecs) (1000000 / usecs) 437 #define VMXNET3_COAL_RBC_USECS(rbc_rate) (1000000 / rbc_rate) 438 439 int 440 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter); 441 442 int 443 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter); 444 445 void 446 vmxnet3_force_close(struct vmxnet3_adapter *adapter); 447 448 void 449 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter); 450 451 void 452 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter); 453 454 void 455 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter); 456 457 int 458 vmxnet3_set_features(struct net_device *netdev, netdev_features_t features); 459 460 int 461 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, 462 u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size, 463 u16 txdata_desc_size, u16 rxdata_desc_size); 464 465 void vmxnet3_set_ethtool_ops(struct net_device *netdev); 466 467 void vmxnet3_get_stats64(struct net_device *dev, 468 struct rtnl_link_stats64 *stats); 469 470 extern char vmxnet3_driver_name[]; 471 #endif 472