1 /********************************************************************** 2 * Author: Cavium, Inc. 3 * 4 * Contact: support@cavium.com 5 * Please include "LiquidIO" in the subject. 6 * 7 * Copyright (c) 2003-2016 Cavium, Inc. 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 **********************************************************************/ 19 20 /*! \file octeon_network.h 21 * \brief Host NIC Driver: Structure and Macro definitions used by NIC Module. 22 */ 23 24 #ifndef __OCTEON_NETWORK_H__ 25 #define __OCTEON_NETWORK_H__ 26 #include <linux/ptp_clock_kernel.h> 27 28 #define LIO_MAX_MTU_SIZE (OCTNET_MAX_FRM_SIZE - OCTNET_FRM_HEADER_SIZE) 29 #define LIO_MIN_MTU_SIZE ETH_MIN_MTU 30 31 /* Bit mask values for lio->ifstate */ 32 #define LIO_IFSTATE_DROQ_OPS 0x01 33 #define LIO_IFSTATE_REGISTERED 0x02 34 #define LIO_IFSTATE_RUNNING 0x04 35 #define LIO_IFSTATE_RX_TIMESTAMP_ENABLED 0x08 36 37 struct oct_nic_stats_resp { 38 u64 rh; 39 struct oct_link_stats stats; 40 u64 status; 41 }; 42 43 struct oct_nic_stats_ctrl { 44 struct completion complete; 45 struct net_device *netdev; 46 }; 47 48 /** LiquidIO per-interface network private data */ 49 struct lio { 50 /** State of the interface. Rx/Tx happens only in the RUNNING state. */ 51 atomic_t ifstate; 52 53 /** Octeon Interface index number. This device will be represented as 54 * oct<ifidx> in the system. 55 */ 56 int ifidx; 57 58 /** Octeon Input queue to use to transmit for this network interface. */ 59 int txq; 60 61 /** Octeon Output queue from which pkts arrive 62 * for this network interface. 63 */ 64 int rxq; 65 66 /** Guards each glist */ 67 spinlock_t *glist_lock; 68 69 /** Array of gather component linked lists */ 70 struct list_head *glist; 71 void **glists_virt_base; 72 dma_addr_t *glists_dma_base; 73 u32 glist_entry_size; 74 75 /** Pointer to the NIC properties for the Octeon device this network 76 * interface is associated with. 77 */ 78 struct octdev_props *octprops; 79 80 /** Pointer to the octeon device structure. */ 81 struct octeon_device *oct_dev; 82 83 struct net_device *netdev; 84 85 /** Link information sent by the core application for this interface. */ 86 struct oct_link_info linfo; 87 88 /** counter of link changes */ 89 u64 link_changes; 90 91 /** Size of Tx queue for this octeon device. */ 92 u32 tx_qsize; 93 94 /** Size of Rx queue for this octeon device. */ 95 u32 rx_qsize; 96 97 /** Size of MTU this octeon device. */ 98 u32 mtu; 99 100 /** msg level flag per interface. */ 101 u32 msg_enable; 102 103 /** Copy of Interface capabilities: TSO, TSO6, LRO, Chescksums . */ 104 u64 dev_capability; 105 106 /* Copy of transmit encapsulation capabilities: 107 * TSO, TSO6, Checksums for this device for Kernel 108 * 3.10.0 onwards 109 */ 110 u64 enc_dev_capability; 111 112 /** Copy of beacaon reg in phy */ 113 u32 phy_beacon_val; 114 115 /** Copy of ctrl reg in phy */ 116 u32 led_ctrl_val; 117 118 /* PTP clock information */ 119 struct ptp_clock_info ptp_info; 120 struct ptp_clock *ptp_clock; 121 s64 ptp_adjust; 122 123 /* for atomic access to Octeon PTP reg and data struct */ 124 spinlock_t ptp_lock; 125 126 /* Interface info */ 127 u32 intf_open; 128 129 /* work queue for txq status */ 130 struct cavium_wq txq_status_wq; 131 132 /* work queue for rxq oom status */ 133 struct cavium_wq rxq_status_wq; 134 135 /* work queue for link status */ 136 struct cavium_wq link_status_wq; 137 138 int netdev_uc_count; 139 }; 140 141 #define LIO_SIZE (sizeof(struct lio)) 142 #define GET_LIO(netdev) ((struct lio *)netdev_priv(netdev)) 143 144 #define LIO_MAX_CORES 12 145 146 /** 147 * \brief Enable or disable feature 148 * @param netdev pointer to network device 149 * @param cmd Command that just requires acknowledgment 150 * @param param1 Parameter to command 151 */ 152 int liquidio_set_feature(struct net_device *netdev, int cmd, u16 param1); 153 154 int setup_rx_oom_poll_fn(struct net_device *netdev); 155 156 void cleanup_rx_oom_poll_fn(struct net_device *netdev); 157 158 /** 159 * \brief Link control command completion callback 160 * @param nctrl_ptr pointer to control packet structure 161 * 162 * This routine is called by the callback function when a ctrl pkt sent to 163 * core app completes. The nctrl_ptr contains a copy of the command type 164 * and data sent to the core app. This routine is only called if the ctrl 165 * pkt was sent successfully to the core app. 166 */ 167 void liquidio_link_ctrl_cmd_completion(void *nctrl_ptr); 168 169 /** 170 * \brief Register ethtool operations 171 * @param netdev pointer to network device 172 */ 173 void liquidio_set_ethtool_ops(struct net_device *netdev); 174 175 #define SKB_ADJ_MASK 0x3F 176 #define SKB_ADJ (SKB_ADJ_MASK + 1) 177 178 #define MIN_SKB_SIZE 256 /* 8 bytes and more - 8 bytes for PTP */ 179 #define LIO_RXBUFFER_SZ 2048 180 181 static inline void 182 *recv_buffer_alloc(struct octeon_device *oct, 183 struct octeon_skb_page_info *pg_info) 184 { 185 struct page *page; 186 struct sk_buff *skb; 187 struct octeon_skb_page_info *skb_pg_info; 188 189 page = alloc_page(GFP_ATOMIC | __GFP_COLD); 190 if (unlikely(!page)) 191 return NULL; 192 193 skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ); 194 if (unlikely(!skb)) { 195 __free_page(page); 196 pg_info->page = NULL; 197 return NULL; 198 } 199 200 if ((unsigned long)skb->data & SKB_ADJ_MASK) { 201 u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK); 202 203 skb_reserve(skb, r); 204 } 205 206 skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 207 /* Get DMA info */ 208 pg_info->dma = dma_map_page(&oct->pci_dev->dev, page, 0, 209 PAGE_SIZE, DMA_FROM_DEVICE); 210 211 /* Mapping failed!! */ 212 if (dma_mapping_error(&oct->pci_dev->dev, pg_info->dma)) { 213 __free_page(page); 214 dev_kfree_skb_any((struct sk_buff *)skb); 215 pg_info->page = NULL; 216 return NULL; 217 } 218 219 pg_info->page = page; 220 pg_info->page_offset = 0; 221 skb_pg_info->page = page; 222 skb_pg_info->page_offset = 0; 223 skb_pg_info->dma = pg_info->dma; 224 225 return (void *)skb; 226 } 227 228 static inline void 229 *recv_buffer_fast_alloc(u32 size) 230 { 231 struct sk_buff *skb; 232 struct octeon_skb_page_info *skb_pg_info; 233 234 skb = dev_alloc_skb(size + SKB_ADJ); 235 if (unlikely(!skb)) 236 return NULL; 237 238 if ((unsigned long)skb->data & SKB_ADJ_MASK) { 239 u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK); 240 241 skb_reserve(skb, r); 242 } 243 244 skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 245 skb_pg_info->page = NULL; 246 skb_pg_info->page_offset = 0; 247 skb_pg_info->dma = 0; 248 249 return skb; 250 } 251 252 static inline int 253 recv_buffer_recycle(struct octeon_device *oct, void *buf) 254 { 255 struct octeon_skb_page_info *pg_info = buf; 256 257 if (!pg_info->page) { 258 dev_err(&oct->pci_dev->dev, "%s: pg_info->page NULL\n", 259 __func__); 260 return -ENOMEM; 261 } 262 263 if (unlikely(page_count(pg_info->page) != 1) || 264 unlikely(page_to_nid(pg_info->page) != numa_node_id())) { 265 dma_unmap_page(&oct->pci_dev->dev, 266 pg_info->dma, (PAGE_SIZE << 0), 267 DMA_FROM_DEVICE); 268 pg_info->dma = 0; 269 pg_info->page = NULL; 270 pg_info->page_offset = 0; 271 return -ENOMEM; 272 } 273 274 /* Flip to other half of the buffer */ 275 if (pg_info->page_offset == 0) 276 pg_info->page_offset = LIO_RXBUFFER_SZ; 277 else 278 pg_info->page_offset = 0; 279 page_ref_inc(pg_info->page); 280 281 return 0; 282 } 283 284 static inline void 285 *recv_buffer_reuse(struct octeon_device *oct, void *buf) 286 { 287 struct octeon_skb_page_info *pg_info = buf, *skb_pg_info; 288 struct sk_buff *skb; 289 290 skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ); 291 if (unlikely(!skb)) { 292 dma_unmap_page(&oct->pci_dev->dev, 293 pg_info->dma, (PAGE_SIZE << 0), 294 DMA_FROM_DEVICE); 295 return NULL; 296 } 297 298 if ((unsigned long)skb->data & SKB_ADJ_MASK) { 299 u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK); 300 301 skb_reserve(skb, r); 302 } 303 304 skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 305 skb_pg_info->page = pg_info->page; 306 skb_pg_info->page_offset = pg_info->page_offset; 307 skb_pg_info->dma = pg_info->dma; 308 309 return skb; 310 } 311 312 static inline void 313 recv_buffer_destroy(void *buffer, struct octeon_skb_page_info *pg_info) 314 { 315 struct sk_buff *skb = (struct sk_buff *)buffer; 316 317 put_page(pg_info->page); 318 pg_info->dma = 0; 319 pg_info->page = NULL; 320 pg_info->page_offset = 0; 321 322 if (skb) 323 dev_kfree_skb_any(skb); 324 } 325 326 static inline void recv_buffer_free(void *buffer) 327 { 328 struct sk_buff *skb = (struct sk_buff *)buffer; 329 struct octeon_skb_page_info *pg_info; 330 331 pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 332 333 if (pg_info->page) { 334 put_page(pg_info->page); 335 pg_info->dma = 0; 336 pg_info->page = NULL; 337 pg_info->page_offset = 0; 338 } 339 340 dev_kfree_skb_any((struct sk_buff *)buffer); 341 } 342 343 static inline void 344 recv_buffer_fast_free(void *buffer) 345 { 346 dev_kfree_skb_any((struct sk_buff *)buffer); 347 } 348 349 static inline void tx_buffer_free(void *buffer) 350 { 351 dev_kfree_skb_any((struct sk_buff *)buffer); 352 } 353 354 #define lio_dma_alloc(oct, size, dma_addr) \ 355 dma_alloc_coherent(&(oct)->pci_dev->dev, size, dma_addr, GFP_KERNEL) 356 #define lio_dma_free(oct, size, virt_addr, dma_addr) \ 357 dma_free_coherent(&(oct)->pci_dev->dev, size, virt_addr, dma_addr) 358 359 static inline 360 void *get_rbd(struct sk_buff *skb) 361 { 362 struct octeon_skb_page_info *pg_info; 363 unsigned char *va; 364 365 pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 366 va = page_address(pg_info->page) + pg_info->page_offset; 367 368 return va; 369 } 370 371 static inline u64 372 lio_map_ring(void *buf) 373 { 374 dma_addr_t dma_addr; 375 376 struct sk_buff *skb = (struct sk_buff *)buf; 377 struct octeon_skb_page_info *pg_info; 378 379 pg_info = ((struct octeon_skb_page_info *)(skb->cb)); 380 if (!pg_info->page) { 381 pr_err("%s: pg_info->page NULL\n", __func__); 382 WARN_ON(1); 383 } 384 385 /* Get DMA info */ 386 dma_addr = pg_info->dma; 387 if (!pg_info->dma) { 388 pr_err("%s: ERROR it should be already available\n", 389 __func__); 390 WARN_ON(1); 391 } 392 dma_addr += pg_info->page_offset; 393 394 return (u64)dma_addr; 395 } 396 397 static inline void 398 lio_unmap_ring(struct pci_dev *pci_dev, 399 u64 buf_ptr) 400 401 { 402 dma_unmap_page(&pci_dev->dev, 403 buf_ptr, (PAGE_SIZE << 0), 404 DMA_FROM_DEVICE); 405 } 406 407 static inline void *octeon_fast_packet_alloc(u32 size) 408 { 409 return recv_buffer_fast_alloc(size); 410 } 411 412 static inline void octeon_fast_packet_next(struct octeon_droq *droq, 413 struct sk_buff *nicbuf, 414 int copy_len, 415 int idx) 416 { 417 skb_put_data(nicbuf, get_rbd(droq->recv_buf_list[idx].buffer), 418 copy_len); 419 } 420 421 /** 422 * \brief check interface state 423 * @param lio per-network private data 424 * @param state_flag flag state to check 425 */ 426 static inline int ifstate_check(struct lio *lio, int state_flag) 427 { 428 return atomic_read(&lio->ifstate) & state_flag; 429 } 430 431 /** 432 * \brief set interface state 433 * @param lio per-network private data 434 * @param state_flag flag state to set 435 */ 436 static inline void ifstate_set(struct lio *lio, int state_flag) 437 { 438 atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) | state_flag)); 439 } 440 441 /** 442 * \brief clear interface state 443 * @param lio per-network private data 444 * @param state_flag flag state to clear 445 */ 446 static inline void ifstate_reset(struct lio *lio, int state_flag) 447 { 448 atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag))); 449 } 450 451 #endif 452