drivers/net/ethernet/hisilicon/hns/hnae.h

   1 /*
   2  * Copyright (c) 2014-2015 Hisilicon Limited.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  */
   9
  10 #ifndef __HNAE_H
  11 #define __HNAE_H
  12
  13 /* Names used in this framework:
  14  *      ae handle (handle):
  15  *        a set of queues provided by AE
  16  *      ring buffer queue (rbq):
  17  *        the channel between upper layer and the AE, can do tx and rx
  18  *      ring:
  19  *        a tx or rx channel within a rbq
  20  *      ring description (desc):
  21  *        an element in the ring with packet information
  22  *      buffer:
  23  *        a memory region referred by desc with the full packet payload
  24  *
  25  * "num" means a static number set as a parameter, "count" mean a dynamic
  26  *   number set while running
  27  * "cb" means control block
  28  */
  29
  30 #include <linux/acpi.h>
  31 #include <linux/delay.h>
  32 #include <linux/device.h>
  33 #include <linux/module.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/notifier.h>
  36 #include <linux/phy.h>
  37 #include <linux/types.h>
  38
  39 #define HNAE_DRIVER_VERSION "2.0"
  40 #define HNAE_DRIVER_NAME "hns"
  41 #define HNAE_COPYRIGHT "Copyright(c) 2015 Huawei Corporation."
  42 #define HNAE_DRIVER_STRING "Hisilicon Network Subsystem Driver"
  43 #define HNAE_DEFAULT_DEVICE_DESCR "Hisilicon Network Subsystem"
  44
  45 #ifdef DEBUG
  46
  47 #ifndef assert
  48 #define assert(expr) \
  49 do { \
  50         if (!(expr)) { \
  51                 pr_err("Assertion failed! %s, %s, %s, line %d\n", \
  52                            #expr, __FILE__, __func__, __LINE__); \
  53         } \
  54 } while (0)
  55 #endif
  56
  57 #else
  58
  59 #ifndef assert
  60 #define assert(expr)
  61 #endif
  62
  63 #endif
  64
  65 #define AE_VERSION_1 ('6' << 16 | '6' << 8 | '0')
  66 #define AE_VERSION_2 ('1' << 24 | '6' << 16 | '1' << 8 | '0')
  67 #define AE_IS_VER1(ver) ((ver) == AE_VERSION_1)
  68 #define AE_NAME_SIZE 16
  69
  70 /* some said the RX and TX RCB format should not be the same in the future. But
  71  * it is the same now...
  72  */
  73 #define RCB_REG_BASEADDR_L         0x00 /* P660 support only 32bit accessing */
  74 #define RCB_REG_BASEADDR_H         0x04
  75 #define RCB_REG_BD_NUM             0x08
  76 #define RCB_REG_BD_LEN             0x0C
  77 #define RCB_REG_PKTLINE            0x10
  78 #define RCB_REG_TAIL               0x18
  79 #define RCB_REG_HEAD               0x1C
  80 #define RCB_REG_FBDNUM             0x20
  81 #define RCB_REG_OFFSET             0x24 /* pkt num to be handled */
  82 #define RCB_REG_PKTNUM_RECORD      0x2C /* total pkt received */
  83
  84 #define HNS_RX_HEAD_SIZE 256
  85
  86 #define HNAE_AE_REGISTER 0x1
  87
  88 #define RCB_RING_NAME_LEN 16
  89
  90 enum hnae_led_state {
  91         HNAE_LED_INACTIVE,
  92         HNAE_LED_ACTIVE,
  93         HNAE_LED_ON,
  94         HNAE_LED_OFF
  95 };
  96
  97 #define HNS_RX_FLAG_VLAN_PRESENT 0x1
  98 #define HNS_RX_FLAG_L3ID_IPV4 0x0
  99 #define HNS_RX_FLAG_L3ID_IPV6 0x1
 100 #define HNS_RX_FLAG_L4ID_UDP 0x0
 101 #define HNS_RX_FLAG_L4ID_TCP 0x1
 102
 103 #define HNS_TXD_ASID_S 0
 104 #define HNS_TXD_ASID_M (0xff << HNS_TXD_ASID_S)
 105 #define HNS_TXD_BUFNUM_S 8
 106 #define HNS_TXD_BUFNUM_M (0x3 << HNS_TXD_BUFNUM_S)
 107 #define HNS_TXD_PORTID_S 10
 108 #define HNS_TXD_PORTID_M (0x7 << HNS_TXD_PORTID_S)
 109
 110 #define HNS_TXD_RA_B 8
 111 #define HNS_TXD_RI_B 9
 112 #define HNS_TXD_L4CS_B 10
 113 #define HNS_TXD_L3CS_B 11
 114 #define HNS_TXD_FE_B 12
 115 #define HNS_TXD_VLD_B 13
 116 #define HNS_TXD_IPOFFSET_S 14
 117 #define HNS_TXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
 118
 119 #define HNS_RXD_IPOFFSET_S 0
 120 #define HNS_RXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
 121 #define HNS_RXD_BUFNUM_S 8
 122 #define HNS_RXD_BUFNUM_M (0x3 << HNS_RXD_BUFNUM_S)
 123 #define HNS_RXD_PORTID_S 10
 124 #define HNS_RXD_PORTID_M (0x7 << HNS_RXD_PORTID_S)
 125 #define HNS_RXD_DMAC_S 13
 126 #define HNS_RXD_DMAC_M (0x3 << HNS_RXD_DMAC_S)
 127 #define HNS_RXD_VLAN_S 15
 128 #define HNS_RXD_VLAN_M (0x3 << HNS_RXD_VLAN_S)
 129 #define HNS_RXD_L3ID_S 17
 130 #define HNS_RXD_L3ID_M (0xf << HNS_RXD_L3ID_S)
 131 #define HNS_RXD_L4ID_S 21
 132 #define HNS_RXD_L4ID_M (0xf << HNS_RXD_L4ID_S)
 133 #define HNS_RXD_FE_B 25
 134 #define HNS_RXD_FRAG_B 26
 135 #define HNS_RXD_VLD_B 27
 136 #define HNS_RXD_L2E_B 28
 137 #define HNS_RXD_L3E_B 29
 138 #define HNS_RXD_L4E_B 30
 139 #define HNS_RXD_DROP_B 31
 140
 141 #define HNS_RXD_VLANID_S 8
 142 #define HNS_RXD_VLANID_M (0xfff << HNS_RXD_VLANID_S)
 143 #define HNS_RXD_CFI_B 20
 144 #define HNS_RXD_PRI_S 21
 145 #define HNS_RXD_PRI_M (0x7 << HNS_RXD_PRI_S)
 146 #define HNS_RXD_ASID_S 24
 147 #define HNS_RXD_ASID_M (0xff << HNS_RXD_ASID_S)
 148
 149 #define HNSV2_TXD_BUFNUM_S 0
 150 #define HNSV2_TXD_BUFNUM_M (0x7 << HNSV2_TXD_BUFNUM_S)
 151 #define HNSV2_TXD_PORTID_S      4
 152 #define HNSV2_TXD_PORTID_M      (0X7 << HNSV2_TXD_PORTID_S)
 153 #define HNSV2_TXD_RI_B   1
 154 #define HNSV2_TXD_L4CS_B   2
 155 #define HNSV2_TXD_L3CS_B   3
 156 #define HNSV2_TXD_FE_B   4
 157 #define HNSV2_TXD_VLD_B  5
 158
 159 #define HNSV2_TXD_TSE_B   0
 160 #define HNSV2_TXD_VLAN_EN_B   1
 161 #define HNSV2_TXD_SNAP_B   2
 162 #define HNSV2_TXD_IPV6_B   3
 163 #define HNSV2_TXD_SCTP_B   4
 164
 165 /* hardware spec ring buffer format */
 166 struct __packed hnae_desc {
 167         __le64 addr;
 168         union {
 169                 struct {
 170                         union {
 171                                 __le16 asid_bufnum_pid;
 172                                 __le16 asid;
 173                         };
 174                         __le16 send_size;
 175                         union {
 176                                 __le32 flag_ipoffset;
 177                                 struct {
 178                                         __u8 bn_pid;
 179                                         __u8 ra_ri_cs_fe_vld;
 180                                         __u8 ip_offset;
 181                                         __u8 tse_vlan_snap_v6_sctp_nth;
 182                                 };
 183                         };
 184                         __le16 mss;
 185                         __u8 l4_len;
 186                         __u8 reserved1;
 187                         __le16 paylen;
 188                         __u8 vmid;
 189                         __u8 qid;
 190                         __le32 reserved2[2];
 191                 } tx;
 192
 193                 struct {
 194                         __le32 ipoff_bnum_pid_flag;
 195                         __le16 pkt_len;
 196                         __le16 size;
 197                         union {
 198                                 __le32 vlan_pri_asid;
 199                                 struct {
 200                                         __le16 asid;
 201                                         __le16 vlan_cfi_pri;
 202                                 };
 203                         };
 204                         __le32 rss_hash;
 205                         __le32 reserved_1[2];
 206                 } rx;
 207         };
 208 };
 209
 210 struct hnae_desc_cb {
 211         dma_addr_t dma; /* dma address of this desc */
 212         void *buf;      /* cpu addr for a desc */
 213
 214         /* priv data for the desc, e.g. skb when use with ip stack*/
 215         void *priv;
 216         u16 page_offset;
 217         u16 reuse_flag;
 218
 219         u16 length;     /* length of the buffer */
 220
 221        /* desc type, used by the ring user to mark the type of the priv data */
 222         u16 type;
 223 };
 224
 225 #define setflags(flags, bits) ((flags) |= (bits))
 226 #define unsetflags(flags, bits) ((flags) &= ~(bits))
 227
 228 /* hnae_ring->flags fields */
 229 #define RINGF_DIR 0x1       /* TX or RX ring, set if TX */
 230 #define is_tx_ring(ring) ((ring)->flags & RINGF_DIR)
 231 #define is_rx_ring(ring) (!is_tx_ring(ring))
 232 #define ring_to_dma_dir(ring) (is_tx_ring(ring) ? \
 233         DMA_TO_DEVICE : DMA_FROM_DEVICE)
 234
 235 struct ring_stats {
 236         u64 io_err_cnt;
 237         u64 sw_err_cnt;
 238         u64 seg_pkt_cnt;
 239         union {
 240                 struct {
 241                         u64 tx_pkts;
 242                         u64 tx_bytes;
 243                         u64 tx_err_cnt;
 244                         u64 restart_queue;
 245                         u64 tx_busy;
 246                 };
 247                 struct {
 248                         u64 rx_pkts;
 249                         u64 rx_bytes;
 250                         u64 rx_err_cnt;
 251                         u64 reuse_pg_cnt;
 252                         u64 err_pkt_len;
 253                         u64 non_vld_descs;
 254                         u64 err_bd_num;
 255                         u64 l2_err;
 256                         u64 l3l4_csum_err;
 257                 };
 258         };
 259 };
 260
 261 struct hnae_queue;
 262
 263 struct hnae_ring {
 264         u8 __iomem *io_base; /* base io address for the ring */
 265         struct hnae_desc *desc; /* dma map address space */
 266         struct hnae_desc_cb *desc_cb;
 267         struct hnae_queue *q;
 268         int irq;
 269         char ring_name[RCB_RING_NAME_LEN];
 270
 271         /* statistic */
 272         struct ring_stats stats;
 273
 274         dma_addr_t desc_dma_addr;
 275         u32 buf_size;       /* size for hnae_desc->addr, preset by AE */
 276         u16 desc_num;       /* total number of desc */
 277         u16 max_desc_num_per_pkt;
 278         u16 max_raw_data_sz_per_desc;
 279         u16 max_pkt_size;
 280         int next_to_use;    /* idx of next spare desc */
 281
 282         /* idx of lastest sent desc, the ring is empty when equal to
 283          * next_to_use
 284          */
 285         int next_to_clean;
 286
 287         int flags;          /* ring attribute */
 288         int irq_init_flag;
 289 };
 290
 291 #define ring_ptr_move_fw(ring, p) \
 292         ((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
 293 #define ring_ptr_move_bw(ring, p) \
 294         ((ring)->p = ((ring)->p - 1 + (ring)->desc_num) % (ring)->desc_num)
 295
 296 enum hns_desc_type {
 297         DESC_TYPE_SKB,
 298         DESC_TYPE_PAGE,
 299 };
 300
 301 #define assert_is_ring_idx(ring, idx) \
 302         assert((idx) >= 0 && (idx) < (ring)->desc_num)
 303
 304 /* the distance between [begin, end) in a ring buffer
 305  * note: there is a unuse slot between the begin and the end
 306  */
 307 static inline int ring_dist(struct hnae_ring *ring, int begin, int end)
 308 {
 309         assert_is_ring_idx(ring, begin);
 310         assert_is_ring_idx(ring, end);
 311
 312         return (end - begin + ring->desc_num) % ring->desc_num;
 313 }
 314
 315 static inline int ring_space(struct hnae_ring *ring)
 316 {
 317         return ring->desc_num -
 318                 ring_dist(ring, ring->next_to_clean, ring->next_to_use) - 1;
 319 }
 320
 321 static inline int is_ring_empty(struct hnae_ring *ring)
 322 {
 323         assert_is_ring_idx(ring, ring->next_to_use);
 324         assert_is_ring_idx(ring, ring->next_to_clean);
 325
 326         return ring->next_to_use == ring->next_to_clean;
 327 }
 328
 329 #define hnae_buf_size(_ring) ((_ring)->buf_size)
 330 #define hnae_page_order(_ring) (get_order(hnae_buf_size(_ring)))
 331 #define hnae_page_size(_ring) (PAGE_SIZE << hnae_page_order(_ring))
 332
 333 struct hnae_handle;
 334
 335 /* allocate and dma map space for hnae desc */
 336 struct hnae_buf_ops {
 337         int (*alloc_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
 338         void (*free_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
 339         int (*map_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
 340         void (*unmap_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
 341 };
 342
 343 struct hnae_queue {
 344         void __iomem *io_base;
 345         phys_addr_t phy_base;
 346         struct hnae_ae_dev *dev;        /* the device who use this queue */
 347         struct hnae_ring rx_ring ____cacheline_internodealigned_in_smp;
 348         struct hnae_ring tx_ring ____cacheline_internodealigned_in_smp;
 349         struct hnae_handle *handle;
 350 };
 351
 352 /*hnae loop mode*/
 353 enum hnae_loop {
 354         MAC_INTERNALLOOP_MAC = 0,
 355         MAC_INTERNALLOOP_SERDES,
 356         MAC_INTERNALLOOP_PHY,
 357         MAC_LOOP_NONE,
 358 };
 359
 360 /*hnae port type*/
 361 enum hnae_port_type {
 362         HNAE_PORT_SERVICE = 0,
 363         HNAE_PORT_DEBUG
 364 };
 365
 366 /* mac media type */
 367 enum hnae_media_type {
 368         HNAE_MEDIA_TYPE_UNKNOWN = 0,
 369         HNAE_MEDIA_TYPE_FIBER,
 370         HNAE_MEDIA_TYPE_COPPER,
 371         HNAE_MEDIA_TYPE_BACKPLANE,
 372 };
 373
 374 /* This struct defines the operation on the handle.
 375  *
 376  * get_handle(): (mandatory)
 377  *   Get a handle from AE according to its name and options.
 378  *   the AE driver should manage the space used by handle and its queues while
 379  *   the HNAE framework will allocate desc and desc_cb for all rings in the
 380  *   queues.
 381  * put_handle():
 382  *   Release the handle.
 383  * start():
 384  *   Enable the hardware, include all queues
 385  * stop():
 386  *   Disable the hardware
 387  * set_opts(): (mandatory)
 388  *   Set options to the AE
 389  * get_opts(): (mandatory)
 390  *   Get options from the AE
 391  * get_status():
 392  *   Get the carrier state of the back channel of the handle, 1 for ok, 0 for
 393  *   non-ok
 394  * toggle_ring_irq(): (mandatory)
 395  *   Set the ring irq to be enabled(0) or disable(1)
 396  * toggle_queue_status(): (mandatory)
 397  *   Set the queue to be enabled(1) or disable(0), this will not change the
 398  *   ring irq state
 399  * adjust_link()
 400  *   adjust link status
 401  * set_loopback()
 402  *   set loopback
 403  * get_ring_bdnum_limit()
 404  *   get ring bd number limit
 405  * get_pauseparam()
 406  *   get tx and rx of pause frame use
 407  * set_autoneg()
 408  *   set auto autonegotiation of pause frame use
 409  * get_autoneg()
 410  *   get auto autonegotiation of pause frame use
 411  * set_pauseparam()
 412  *   set tx and rx of pause frame use
 413  * get_coalesce_usecs()
 414  *   get usecs to delay a TX interrupt after a packet is sent
 415  * get_rx_max_coalesced_frames()
 416  *   get Maximum number of packets to be sent before a TX interrupt.
 417  * set_coalesce_usecs()
 418  *   set usecs to delay a TX interrupt after a packet is sent
 419  * set_coalesce_frames()
 420  *   set Maximum number of packets to be sent before a TX interrupt.
 421  * get_ringnum()
 422  *   get RX/TX ring number
 423  * get_max_ringnum()
 424  *   get RX/TX ring maximum number
 425  * get_mac_addr()
 426  *   get mac address
 427  * set_mac_addr()
 428  *   set mac address
 429  * set_mc_addr()
 430  *   set multicast mode
 431  * set_mtu()
 432  *   set mtu
 433  * update_stats()
 434  *   update Old network device statistics
 435  * get_ethtool_stats()
 436  *   get ethtool network device statistics
 437  * get_strings()
 438  *   get a set of strings that describe the requested objects
 439  * get_sset_count()
 440  *   get number of strings that @get_strings will write
 441  * update_led_status()
 442  *   update the led status
 443  * set_led_id()
 444  *   set led id
 445  * get_regs()
 446  *   get regs dump
 447  * get_regs_len()
 448  *   get the len of the regs dump
 449  */
 450 struct hnae_ae_ops {
 451         struct hnae_handle *(*get_handle)(struct hnae_ae_dev *dev,
 452                                           u32 port_id);
 453         void (*put_handle)(struct hnae_handle *handle);
 454         void (*init_queue)(struct hnae_queue *q);
 455         void (*fini_queue)(struct hnae_queue *q);
 456         int (*start)(struct hnae_handle *handle);
 457         void (*stop)(struct hnae_handle *handle);
 458         void (*reset)(struct hnae_handle *handle);
 459         int (*set_opts)(struct hnae_handle *handle, int type, void *opts);
 460         int (*get_opts)(struct hnae_handle *handle, int type, void **opts);
 461         int (*get_status)(struct hnae_handle *handle);
 462         int (*get_info)(struct hnae_handle *handle,
 463                         u8 *auto_neg, u16 *speed, u8 *duplex);
 464         void (*toggle_ring_irq)(struct hnae_ring *ring, u32 val);
 465         void (*adjust_link)(struct hnae_handle *handle, int speed, int duplex);
 466         int (*set_loopback)(struct hnae_handle *handle,
 467                             enum hnae_loop loop_mode, int en);
 468         void (*get_ring_bdnum_limit)(struct hnae_queue *queue,
 469                                      u32 *uplimit);
 470         void (*get_pauseparam)(struct hnae_handle *handle,
 471                                u32 *auto_neg, u32 *rx_en, u32 *tx_en);
 472         int (*set_autoneg)(struct hnae_handle *handle, u8 enable);
 473         int (*get_autoneg)(struct hnae_handle *handle);
 474         int (*set_pauseparam)(struct hnae_handle *handle,
 475                               u32 auto_neg, u32 rx_en, u32 tx_en);
 476         void (*get_coalesce_usecs)(struct hnae_handle *handle,
 477                                    u32 *tx_usecs, u32 *rx_usecs);
 478         void (*get_rx_max_coalesced_frames)(struct hnae_handle *handle,
 479                                             u32 *tx_frames, u32 *rx_frames);
 480         int (*set_coalesce_usecs)(struct hnae_handle *handle, u32 timeout);
 481         int (*set_coalesce_frames)(struct hnae_handle *handle,
 482                                    u32 coalesce_frames);
 483         void (*get_coalesce_range)(struct hnae_handle *handle,
 484                                    u32 *tx_frames_low, u32 *rx_frames_low,
 485                                    u32 *tx_frames_high, u32 *rx_frames_high,
 486                                    u32 *tx_usecs_low, u32 *rx_usecs_low,
 487                                    u32 *tx_usecs_high, u32 *rx_usecs_high);
 488         void (*set_promisc_mode)(struct hnae_handle *handle, u32 en);
 489         int (*get_mac_addr)(struct hnae_handle *handle, void **p);
 490         int (*set_mac_addr)(struct hnae_handle *handle, void *p);
 491         int (*set_mc_addr)(struct hnae_handle *handle, void *addr);
 492         int (*set_mtu)(struct hnae_handle *handle, int new_mtu);
 493         void (*set_tso_stats)(struct hnae_handle *handle, int enable);
 494         void (*update_stats)(struct hnae_handle *handle,
 495                              struct net_device_stats *net_stats);
 496         void (*get_stats)(struct hnae_handle *handle, u64 *data);
 497         void (*get_strings)(struct hnae_handle *handle,
 498                             u32 stringset, u8 *data);
 499         int (*get_sset_count)(struct hnae_handle *handle, int stringset);
 500         void (*update_led_status)(struct hnae_handle *handle);
 501         int (*set_led_id)(struct hnae_handle *handle,
 502                           enum hnae_led_state status);
 503         void (*get_regs)(struct hnae_handle *handle, void *data);
 504         int (*get_regs_len)(struct hnae_handle *handle);
 505         u32     (*get_rss_key_size)(struct hnae_handle *handle);
 506         u32     (*get_rss_indir_size)(struct hnae_handle *handle);
 507         int     (*get_rss)(struct hnae_handle *handle, u32 *indir, u8 *key,
 508                            u8 *hfunc);
 509         int     (*set_rss)(struct hnae_handle *handle, const u32 *indir,
 510                            const u8 *key, const u8 hfunc);
 511 };
 512
 513 struct hnae_ae_dev {
 514         struct device cls_dev; /* the class dev */
 515         struct device *dev; /* the presented dev */
 516         struct hnae_ae_ops *ops;
 517         struct list_head node;
 518         struct module *owner; /* the module who provides this dev */
 519         int id;
 520         char name[AE_NAME_SIZE];
 521         struct list_head handle_list;
 522         spinlock_t lock; /* lock to protect the handle_list */
 523 };
 524
 525 struct hnae_handle {
 526         struct device *owner_dev; /* the device which make use of this handle */
 527         struct hnae_ae_dev *dev;  /* the device who provides this handle */
 528         struct phy_device *phy_dev;
 529         phy_interface_t phy_if;
 530         u32 if_support;
 531         int q_num;
 532         int vf_id;
 533         u32 eport_id;
 534         u32 dport_id;   /* v2 tx bd should fill the dport_id */
 535         enum hnae_port_type port_type;
 536         enum hnae_media_type media_type;
 537         struct list_head node;    /* list to hnae_ae_dev->handle_list */
 538         struct hnae_buf_ops *bops; /* operation for the buffer */
 539         struct hnae_queue **qs;  /* array base of all queues */
 540 };
 541
 542 #define ring_to_dev(ring) ((ring)->q->dev->dev)
 543
 544 struct hnae_handle *hnae_get_handle(struct device *owner_dev,
 545                                     const struct fwnode_handle  *fwnode,
 546                                     u32 port_id,
 547                                     struct hnae_buf_ops *bops);
 548
 549 void hnae_put_handle(struct hnae_handle *handle);
 550 int hnae_ae_register(struct hnae_ae_dev *dev, struct module *owner);
 551 void hnae_ae_unregister(struct hnae_ae_dev *dev);
 552
 553 int hnae_register_notifier(struct notifier_block *nb);
 554 void hnae_unregister_notifier(struct notifier_block *nb);
 555 int hnae_reinit_handle(struct hnae_handle *handle);
 556
 557 #define hnae_queue_xmit(q, buf_num) writel_relaxed(buf_num, \
 558         (q)->tx_ring.io_base + RCB_REG_TAIL)
 559
 560 #ifndef assert
 561 #define assert(cond)
 562 #endif
 563
 564 static inline int hnae_reserve_buffer_map(struct hnae_ring *ring,
 565                                           struct hnae_desc_cb *cb)
 566 {
 567         struct hnae_buf_ops *bops = ring->q->handle->bops;
 568         int ret;
 569
 570         ret = bops->alloc_buffer(ring, cb);
 571         if (ret)
 572                 goto out;
 573
 574         ret = bops->map_buffer(ring, cb);
 575         if (ret)
 576                 goto out_with_buf;
 577
 578         return 0;
 579
 580 out_with_buf:
 581         bops->free_buffer(ring, cb);
 582 out:
 583         return ret;
 584 }
 585
 586 static inline int hnae_alloc_buffer_attach(struct hnae_ring *ring, int i)
 587 {
 588         int ret = hnae_reserve_buffer_map(ring, &ring->desc_cb[i]);
 589
 590         if (ret)
 591                 return ret;
 592
 593         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
 594
 595         return 0;
 596 }
 597
 598 static inline void hnae_buffer_detach(struct hnae_ring *ring, int i)
 599 {
 600         ring->q->handle->bops->unmap_buffer(ring, &ring->desc_cb[i]);
 601         ring->desc[i].addr = 0;
 602 }
 603
 604 static inline void hnae_free_buffer_detach(struct hnae_ring *ring, int i)
 605 {
 606         struct hnae_buf_ops *bops = ring->q->handle->bops;
 607         struct hnae_desc_cb *cb = &ring->desc_cb[i];
 608
 609         if (!ring->desc_cb[i].dma)
 610                 return;
 611
 612         hnae_buffer_detach(ring, i);
 613         bops->free_buffer(ring, cb);
 614 }
 615
 616 /* detach a in-used buffer and replace with a reserved one  */
 617 static inline void hnae_replace_buffer(struct hnae_ring *ring, int i,
 618                                        struct hnae_desc_cb *res_cb)
 619 {
 620         struct hnae_buf_ops *bops = ring->q->handle->bops;
 621
 622         bops->unmap_buffer(ring, &ring->desc_cb[i]);
 623         ring->desc_cb[i] = *res_cb;
 624         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
 625         ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
 626 }
 627
 628 static inline void hnae_reuse_buffer(struct hnae_ring *ring, int i)
 629 {
 630         ring->desc_cb[i].reuse_flag = 0;
 631         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
 632                 + ring->desc_cb[i].page_offset);
 633         ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
 634 }
 635
 636 #define hnae_set_field(origin, mask, shift, val) \
 637         do { \
 638                 (origin) &= (~(mask)); \
 639                 (origin) |= ((val) << (shift)) & (mask); \
 640         } while (0)
 641
 642 #define hnae_set_bit(origin, shift, val) \
 643         hnae_set_field((origin), (0x1 << (shift)), (shift), (val))
 644
 645 #define hnae_get_field(origin, mask, shift) (((origin) & (mask)) >> (shift))
 646
 647 #define hnae_get_bit(origin, shift) \
 648         hnae_get_field((origin), (0x1 << (shift)), (shift))
 649
 650 #endif