include/linux/avf/virtchnl.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*******************************************************************************
   3  *
   4  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   5  * Copyright(c) 2013 - 2014 Intel Corporation.
   6  *
   7  * Contact Information:
   8  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
   9  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  10  *
  11  ******************************************************************************/
  12
  13 #ifndef _VIRTCHNL_H_
  14 #define _VIRTCHNL_H_
  15
  16 /* Description:
  17  * This header file describes the VF-PF communication protocol used
  18  * by the drivers for all devices starting from our 40G product line
  19  *
  20  * Admin queue buffer usage:
  21  * desc->opcode is always aqc_opc_send_msg_to_pf
  22  * flags, retval, datalen, and data addr are all used normally.
  23  * The Firmware copies the cookie fields when sending messages between the
  24  * PF and VF, but uses all other fields internally. Due to this limitation,
  25  * we must send all messages as "indirect", i.e. using an external buffer.
  26  *
  27  * All the VSI indexes are relative to the VF. Each VF can have maximum of
  28  * three VSIs. All the queue indexes are relative to the VSI.  Each VF can
  29  * have a maximum of sixteen queues for all of its VSIs.
  30  *
  31  * The PF is required to return a status code in v_retval for all messages
  32  * except RESET_VF, which does not require any response. The return value
  33  * is of status_code type, defined in the shared type.h.
  34  *
  35  * In general, VF driver initialization should roughly follow the order of
  36  * these opcodes. The VF driver must first validate the API version of the
  37  * PF driver, then request a reset, then get resources, then configure
  38  * queues and interrupts. After these operations are complete, the VF
  39  * driver may start its queues, optionally add MAC and VLAN filters, and
  40  * process traffic.
  41  */
  42
  43 /* START GENERIC DEFINES
  44  * Need to ensure the following enums and defines hold the same meaning and
  45  * value in current and future projects
  46  */
  47
  48 /* Error Codes */
  49 enum virtchnl_status_code {
  50         VIRTCHNL_STATUS_SUCCESS                         = 0,
  51         VIRTCHNL_STATUS_ERR_PARAM                       = -5,
  52         VIRTCHNL_STATUS_ERR_NO_MEMORY                   = -18,
  53         VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH             = -38,
  54         VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR             = -39,
  55         VIRTCHNL_STATUS_ERR_INVALID_VF_ID               = -40,
  56         VIRTCHNL_STATUS_ERR_ADMIN_QUEUE_ERROR           = -53,
  57         VIRTCHNL_STATUS_ERR_NOT_SUPPORTED               = -64,
  58 };
  59
  60 /* Backward compatibility */
  61 #define VIRTCHNL_ERR_PARAM VIRTCHNL_STATUS_ERR_PARAM
  62 #define VIRTCHNL_STATUS_NOT_SUPPORTED VIRTCHNL_STATUS_ERR_NOT_SUPPORTED
  63
  64 #define VIRTCHNL_LINK_SPEED_2_5GB_SHIFT         0x0
  65 #define VIRTCHNL_LINK_SPEED_100MB_SHIFT         0x1
  66 #define VIRTCHNL_LINK_SPEED_1000MB_SHIFT        0x2
  67 #define VIRTCHNL_LINK_SPEED_10GB_SHIFT          0x3
  68 #define VIRTCHNL_LINK_SPEED_40GB_SHIFT          0x4
  69 #define VIRTCHNL_LINK_SPEED_20GB_SHIFT          0x5
  70 #define VIRTCHNL_LINK_SPEED_25GB_SHIFT          0x6
  71 #define VIRTCHNL_LINK_SPEED_5GB_SHIFT           0x7
  72
  73 enum virtchnl_link_speed {
  74         VIRTCHNL_LINK_SPEED_UNKNOWN     = 0,
  75         VIRTCHNL_LINK_SPEED_100MB       = BIT(VIRTCHNL_LINK_SPEED_100MB_SHIFT),
  76         VIRTCHNL_LINK_SPEED_1GB         = BIT(VIRTCHNL_LINK_SPEED_1000MB_SHIFT),
  77         VIRTCHNL_LINK_SPEED_10GB        = BIT(VIRTCHNL_LINK_SPEED_10GB_SHIFT),
  78         VIRTCHNL_LINK_SPEED_40GB        = BIT(VIRTCHNL_LINK_SPEED_40GB_SHIFT),
  79         VIRTCHNL_LINK_SPEED_20GB        = BIT(VIRTCHNL_LINK_SPEED_20GB_SHIFT),
  80         VIRTCHNL_LINK_SPEED_25GB        = BIT(VIRTCHNL_LINK_SPEED_25GB_SHIFT),
  81         VIRTCHNL_LINK_SPEED_2_5GB       = BIT(VIRTCHNL_LINK_SPEED_2_5GB_SHIFT),
  82         VIRTCHNL_LINK_SPEED_5GB         = BIT(VIRTCHNL_LINK_SPEED_5GB_SHIFT),
  83 };
  84
  85 /* for hsplit_0 field of Rx HMC context */
  86 /* deprecated with AVF 1.0 */
  87 enum virtchnl_rx_hsplit {
  88         VIRTCHNL_RX_HSPLIT_NO_SPLIT      = 0,
  89         VIRTCHNL_RX_HSPLIT_SPLIT_L2      = 1,
  90         VIRTCHNL_RX_HSPLIT_SPLIT_IP      = 2,
  91         VIRTCHNL_RX_HSPLIT_SPLIT_TCP_UDP = 4,
  92         VIRTCHNL_RX_HSPLIT_SPLIT_SCTP    = 8,
  93 };
  94
  95 /* END GENERIC DEFINES */
  96
  97 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
  98  * of the virtchnl_msg structure.
  99  */
 100 enum virtchnl_ops {
 101 /* The PF sends status change events to VFs using
 102  * the VIRTCHNL_OP_EVENT opcode.
 103  * VFs send requests to the PF using the other ops.
 104  * Use of "advanced opcode" features must be negotiated as part of capabilities
 105  * exchange and are not considered part of base mode feature set.
 106  */
 107         VIRTCHNL_OP_UNKNOWN = 0,
 108         VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
 109         VIRTCHNL_OP_RESET_VF = 2,
 110         VIRTCHNL_OP_GET_VF_RESOURCES = 3,
 111         VIRTCHNL_OP_CONFIG_TX_QUEUE = 4,
 112         VIRTCHNL_OP_CONFIG_RX_QUEUE = 5,
 113         VIRTCHNL_OP_CONFIG_VSI_QUEUES = 6,
 114         VIRTCHNL_OP_CONFIG_IRQ_MAP = 7,
 115         VIRTCHNL_OP_ENABLE_QUEUES = 8,
 116         VIRTCHNL_OP_DISABLE_QUEUES = 9,
 117         VIRTCHNL_OP_ADD_ETH_ADDR = 10,
 118         VIRTCHNL_OP_DEL_ETH_ADDR = 11,
 119         VIRTCHNL_OP_ADD_VLAN = 12,
 120         VIRTCHNL_OP_DEL_VLAN = 13,
 121         VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
 122         VIRTCHNL_OP_GET_STATS = 15,
 123         VIRTCHNL_OP_RSVD = 16,
 124         VIRTCHNL_OP_EVENT = 17, /* must ALWAYS be 17 */
 125         VIRTCHNL_OP_IWARP = 20, /* advanced opcode */
 126         VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP = 21, /* advanced opcode */
 127         VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP = 22, /* advanced opcode */
 128         VIRTCHNL_OP_CONFIG_RSS_KEY = 23,
 129         VIRTCHNL_OP_CONFIG_RSS_LUT = 24,
 130         VIRTCHNL_OP_GET_RSS_HENA_CAPS = 25,
 131         VIRTCHNL_OP_SET_RSS_HENA = 26,
 132         VIRTCHNL_OP_ENABLE_VLAN_STRIPPING = 27,
 133         VIRTCHNL_OP_DISABLE_VLAN_STRIPPING = 28,
 134         VIRTCHNL_OP_REQUEST_QUEUES = 29,
 135         VIRTCHNL_OP_ENABLE_CHANNELS = 30,
 136         VIRTCHNL_OP_DISABLE_CHANNELS = 31,
 137         VIRTCHNL_OP_ADD_CLOUD_FILTER = 32,
 138         VIRTCHNL_OP_DEL_CLOUD_FILTER = 33,
 139 };
 140
 141 /* These macros are used to generate compilation errors if a structure/union
 142  * is not exactly the correct length. It gives a divide by zero error if the
 143  * structure/union is not of the correct size, otherwise it creates an enum
 144  * that is never used.
 145  */
 146 #define VIRTCHNL_CHECK_STRUCT_LEN(n, X) enum virtchnl_static_assert_enum_##X \
 147         { virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
 148 #define VIRTCHNL_CHECK_UNION_LEN(n, X) enum virtchnl_static_asset_enum_##X \
 149         { virtchnl_static_assert_##X = (n)/((sizeof(union X) == (n)) ? 1 : 0) }
 150
 151 /* Virtual channel message descriptor. This overlays the admin queue
 152  * descriptor. All other data is passed in external buffers.
 153  */
 154
 155 struct virtchnl_msg {
 156         u8 pad[8];                       /* AQ flags/opcode/len/retval fields */
 157         enum virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
 158         enum virtchnl_status_code v_retval;  /* ditto for desc->retval */
 159         u32 vfid;                        /* used by PF when sending to VF */
 160 };
 161
 162 VIRTCHNL_CHECK_STRUCT_LEN(20, virtchnl_msg);
 163
 164 /* Message descriptions and data structures. */
 165
 166 /* VIRTCHNL_OP_VERSION
 167  * VF posts its version number to the PF. PF responds with its version number
 168  * in the same format, along with a return code.
 169  * Reply from PF has its major/minor versions also in param0 and param1.
 170  * If there is a major version mismatch, then the VF cannot operate.
 171  * If there is a minor version mismatch, then the VF can operate but should
 172  * add a warning to the system log.
 173  *
 174  * This enum element MUST always be specified as == 1, regardless of other
 175  * changes in the API. The PF must always respond to this message without
 176  * error regardless of version mismatch.
 177  */
 178 #define VIRTCHNL_VERSION_MAJOR          1
 179 #define VIRTCHNL_VERSION_MINOR          1
 180 #define VIRTCHNL_VERSION_MINOR_NO_VF_CAPS       0
 181
 182 struct virtchnl_version_info {
 183         u32 major;
 184         u32 minor;
 185 };
 186
 187 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_version_info);
 188
 189 #define VF_IS_V10(_v) (((_v)->major == 1) && ((_v)->minor == 0))
 190 #define VF_IS_V11(_ver) (((_ver)->major == 1) && ((_ver)->minor == 1))
 191
 192 /* VIRTCHNL_OP_RESET_VF
 193  * VF sends this request to PF with no parameters
 194  * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
 195  * until reset completion is indicated. The admin queue must be reinitialized
 196  * after this operation.
 197  *
 198  * When reset is complete, PF must ensure that all queues in all VSIs associated
 199  * with the VF are stopped, all queue configurations in the HMC are set to 0,
 200  * and all MAC and VLAN filters (except the default MAC address) on all VSIs
 201  * are cleared.
 202  */
 203
 204 /* VSI types that use VIRTCHNL interface for VF-PF communication. VSI_SRIOV
 205  * vsi_type should always be 6 for backward compatibility. Add other fields
 206  * as needed.
 207  */
 208 enum virtchnl_vsi_type {
 209         VIRTCHNL_VSI_TYPE_INVALID = 0,
 210         VIRTCHNL_VSI_SRIOV = 6,
 211 };
 212
 213 /* VIRTCHNL_OP_GET_VF_RESOURCES
 214  * Version 1.0 VF sends this request to PF with no parameters
 215  * Version 1.1 VF sends this request to PF with u32 bitmap of its capabilities
 216  * PF responds with an indirect message containing
 217  * virtchnl_vf_resource and one or more
 218  * virtchnl_vsi_resource structures.
 219  */
 220
 221 struct virtchnl_vsi_resource {
 222         u16 vsi_id;
 223         u16 num_queue_pairs;
 224         enum virtchnl_vsi_type vsi_type;
 225         u16 qset_handle;
 226         u8 default_mac_addr[ETH_ALEN];
 227 };
 228
 229 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);
 230
 231 /* VF capability flags
 232  * VIRTCHNL_VF_OFFLOAD_L2 flag is inclusive of base mode L2 offloads including
 233  * TX/RX Checksum offloading and TSO for non-tunnelled packets.
 234  */
 235 #define VIRTCHNL_VF_OFFLOAD_L2                  0x00000001
 236 #define VIRTCHNL_VF_OFFLOAD_IWARP               0x00000002
 237 #define VIRTCHNL_VF_OFFLOAD_RSVD                0x00000004
 238 #define VIRTCHNL_VF_OFFLOAD_RSS_AQ              0x00000008
 239 #define VIRTCHNL_VF_OFFLOAD_RSS_REG             0x00000010
 240 #define VIRTCHNL_VF_OFFLOAD_WB_ON_ITR           0x00000020
 241 #define VIRTCHNL_VF_OFFLOAD_REQ_QUEUES          0x00000040
 242 #define VIRTCHNL_VF_OFFLOAD_VLAN                0x00010000
 243 #define VIRTCHNL_VF_OFFLOAD_RX_POLLING          0x00020000
 244 #define VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2       0x00040000
 245 #define VIRTCHNL_VF_OFFLOAD_RSS_PF              0X00080000
 246 #define VIRTCHNL_VF_OFFLOAD_ENCAP               0X00100000
 247 #define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM          0X00200000
 248 #define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM       0X00400000
 249 #define VIRTCHNL_VF_OFFLOAD_ADQ                 0X00800000
 250
 251 /* Define below the capability flags that are not offloads */
 252 #define VIRTCHNL_VF_CAP_ADV_LINK_SPEED          0x00000080
 253 #define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
 254                                VIRTCHNL_VF_OFFLOAD_VLAN | \
 255                                VIRTCHNL_VF_OFFLOAD_RSS_PF)
 256
 257 struct virtchnl_vf_resource {
 258         u16 num_vsis;
 259         u16 num_queue_pairs;
 260         u16 max_vectors;
 261         u16 max_mtu;
 262
 263         u32 vf_cap_flags;
 264         u32 rss_key_size;
 265         u32 rss_lut_size;
 266
 267         struct virtchnl_vsi_resource vsi_res[1];
 268 };
 269
 270 VIRTCHNL_CHECK_STRUCT_LEN(36, virtchnl_vf_resource);
 271
 272 /* VIRTCHNL_OP_CONFIG_TX_QUEUE
 273  * VF sends this message to set up parameters for one TX queue.
 274  * External data buffer contains one instance of virtchnl_txq_info.
 275  * PF configures requested queue and returns a status code.
 276  */
 277
 278 /* Tx queue config info */
 279 struct virtchnl_txq_info {
 280         u16 vsi_id;
 281         u16 queue_id;
 282         u16 ring_len;           /* number of descriptors, multiple of 8 */
 283         u16 headwb_enabled; /* deprecated with AVF 1.0 */
 284         u64 dma_ring_addr;
 285         u64 dma_headwb_addr; /* deprecated with AVF 1.0 */
 286 };
 287
 288 VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_txq_info);
 289
 290 /* VIRTCHNL_OP_CONFIG_RX_QUEUE
 291  * VF sends this message to set up parameters for one RX queue.
 292  * External data buffer contains one instance of virtchnl_rxq_info.
 293  * PF configures requested queue and returns a status code.
 294  */
 295
 296 /* Rx queue config info */
 297 struct virtchnl_rxq_info {
 298         u16 vsi_id;
 299         u16 queue_id;
 300         u32 ring_len;           /* number of descriptors, multiple of 32 */
 301         u16 hdr_size;
 302         u16 splithdr_enabled; /* deprecated with AVF 1.0 */
 303         u32 databuffer_size;
 304         u32 max_pkt_size;
 305         u32 pad1;
 306         u64 dma_ring_addr;
 307         enum virtchnl_rx_hsplit rx_split_pos; /* deprecated with AVF 1.0 */
 308         u32 pad2;
 309 };
 310
 311 VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_rxq_info);
 312
 313 /* VIRTCHNL_OP_CONFIG_VSI_QUEUES
 314  * VF sends this message to set parameters for all active TX and RX queues
 315  * associated with the specified VSI.
 316  * PF configures queues and returns status.
 317  * If the number of queues specified is greater than the number of queues
 318  * associated with the VSI, an error is returned and no queues are configured.
 319  */
 320 struct virtchnl_queue_pair_info {
 321         /* NOTE: vsi_id and queue_id should be identical for both queues. */
 322         struct virtchnl_txq_info txq;
 323         struct virtchnl_rxq_info rxq;
 324 };
 325
 326 VIRTCHNL_CHECK_STRUCT_LEN(64, virtchnl_queue_pair_info);
 327
 328 struct virtchnl_vsi_queue_config_info {
 329         u16 vsi_id;
 330         u16 num_queue_pairs;
 331         u32 pad;
 332         struct virtchnl_queue_pair_info qpair[1];
 333 };
 334
 335 VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_vsi_queue_config_info);
 336
 337 /* VIRTCHNL_OP_REQUEST_QUEUES
 338  * VF sends this message to request the PF to allocate additional queues to
 339  * this VF.  Each VF gets a guaranteed number of queues on init but asking for
 340  * additional queues must be negotiated.  This is a best effort request as it
 341  * is possible the PF does not have enough queues left to support the request.
 342  * If the PF cannot support the number requested it will respond with the
 343  * maximum number it is able to support.  If the request is successful, PF will
 344  * then reset the VF to institute required changes.
 345  */
 346
 347 /* VF resource request */
 348 struct virtchnl_vf_res_request {
 349         u16 num_queue_pairs;
 350 };
 351
 352 /* VIRTCHNL_OP_CONFIG_IRQ_MAP
 353  * VF uses this message to map vectors to queues.
 354  * The rxq_map and txq_map fields are bitmaps used to indicate which queues
 355  * are to be associated with the specified vector.
 356  * The "other" causes are always mapped to vector 0.
 357  * PF configures interrupt mapping and returns status.
 358  */
 359 struct virtchnl_vector_map {
 360         u16 vsi_id;
 361         u16 vector_id;
 362         u16 rxq_map;
 363         u16 txq_map;
 364         u16 rxitr_idx;
 365         u16 txitr_idx;
 366 };
 367
 368 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_vector_map);
 369
 370 struct virtchnl_irq_map_info {
 371         u16 num_vectors;
 372         struct virtchnl_vector_map vecmap[1];
 373 };
 374
 375 VIRTCHNL_CHECK_STRUCT_LEN(14, virtchnl_irq_map_info);
 376
 377 /* VIRTCHNL_OP_ENABLE_QUEUES
 378  * VIRTCHNL_OP_DISABLE_QUEUES
 379  * VF sends these message to enable or disable TX/RX queue pairs.
 380  * The queues fields are bitmaps indicating which queues to act upon.
 381  * (Currently, we only support 16 queues per VF, but we make the field
 382  * u32 to allow for expansion.)
 383  * PF performs requested action and returns status.
 384  */
 385 struct virtchnl_queue_select {
 386         u16 vsi_id;
 387         u16 pad;
 388         u32 rx_queues;
 389         u32 tx_queues;
 390 };
 391
 392 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_queue_select);
 393
 394 /* VIRTCHNL_OP_ADD_ETH_ADDR
 395  * VF sends this message in order to add one or more unicast or multicast
 396  * address filters for the specified VSI.
 397  * PF adds the filters and returns status.
 398  */
 399
 400 /* VIRTCHNL_OP_DEL_ETH_ADDR
 401  * VF sends this message in order to remove one or more unicast or multicast
 402  * filters for the specified VSI.
 403  * PF removes the filters and returns status.
 404  */
 405
 406 struct virtchnl_ether_addr {
 407         u8 addr[ETH_ALEN];
 408         u8 pad[2];
 409 };
 410
 411 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_ether_addr);
 412
 413 struct virtchnl_ether_addr_list {
 414         u16 vsi_id;
 415         u16 num_elements;
 416         struct virtchnl_ether_addr list[1];
 417 };
 418
 419 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_ether_addr_list);
 420
 421 /* VIRTCHNL_OP_ADD_VLAN
 422  * VF sends this message to add one or more VLAN tag filters for receives.
 423  * PF adds the filters and returns status.
 424  * If a port VLAN is configured by the PF, this operation will return an
 425  * error to the VF.
 426  */
 427
 428 /* VIRTCHNL_OP_DEL_VLAN
 429  * VF sends this message to remove one or more VLAN tag filters for receives.
 430  * PF removes the filters and returns status.
 431  * If a port VLAN is configured by the PF, this operation will return an
 432  * error to the VF.
 433  */
 434
 435 struct virtchnl_vlan_filter_list {
 436         u16 vsi_id;
 437         u16 num_elements;
 438         u16 vlan_id[1];
 439 };
 440
 441 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_vlan_filter_list);
 442
 443 /* VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
 444  * VF sends VSI id and flags.
 445  * PF returns status code in retval.
 446  * Note: we assume that broadcast accept mode is always enabled.
 447  */
 448 struct virtchnl_promisc_info {
 449         u16 vsi_id;
 450         u16 flags;
 451 };
 452
 453 VIRTCHNL_CHECK_STRUCT_LEN(4, virtchnl_promisc_info);
 454
 455 #define FLAG_VF_UNICAST_PROMISC 0x00000001
 456 #define FLAG_VF_MULTICAST_PROMISC       0x00000002
 457
 458 /* VIRTCHNL_OP_GET_STATS
 459  * VF sends this message to request stats for the selected VSI. VF uses
 460  * the virtchnl_queue_select struct to specify the VSI. The queue_id
 461  * field is ignored by the PF.
 462  *
 463  * PF replies with struct eth_stats in an external buffer.
 464  */
 465
 466 /* VIRTCHNL_OP_CONFIG_RSS_KEY
 467  * VIRTCHNL_OP_CONFIG_RSS_LUT
 468  * VF sends these messages to configure RSS. Only supported if both PF
 469  * and VF drivers set the VIRTCHNL_VF_OFFLOAD_RSS_PF bit during
 470  * configuration negotiation. If this is the case, then the RSS fields in
 471  * the VF resource struct are valid.
 472  * Both the key and LUT are initialized to 0 by the PF, meaning that
 473  * RSS is effectively disabled until set up by the VF.
 474  */
 475 struct virtchnl_rss_key {
 476         u16 vsi_id;
 477         u16 key_len;
 478         u8 key[1];         /* RSS hash key, packed bytes */
 479 };
 480
 481 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_key);
 482
 483 struct virtchnl_rss_lut {
 484         u16 vsi_id;
 485         u16 lut_entries;
 486         u8 lut[1];        /* RSS lookup table */
 487 };
 488
 489 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_lut);
 490
 491 /* VIRTCHNL_OP_GET_RSS_HENA_CAPS
 492  * VIRTCHNL_OP_SET_RSS_HENA
 493  * VF sends these messages to get and set the hash filter enable bits for RSS.
 494  * By default, the PF sets these to all possible traffic types that the
 495  * hardware supports. The VF can query this value if it wants to change the
 496  * traffic types that are hashed by the hardware.
 497  */
 498 struct virtchnl_rss_hena {
 499         u64 hena;
 500 };
 501
 502 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_rss_hena);
 503
 504 /* VIRTCHNL_OP_ENABLE_CHANNELS
 505  * VIRTCHNL_OP_DISABLE_CHANNELS
 506  * VF sends these messages to enable or disable channels based on
 507  * the user specified queue count and queue offset for each traffic class.
 508  * This struct encompasses all the information that the PF needs from
 509  * VF to create a channel.
 510  */
 511 struct virtchnl_channel_info {
 512         u16 count; /* number of queues in a channel */
 513         u16 offset; /* queues in a channel start from 'offset' */
 514         u32 pad;
 515         u64 max_tx_rate;
 516 };
 517
 518 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_channel_info);
 519
 520 struct virtchnl_tc_info {
 521         u32     num_tc;
 522         u32     pad;
 523         struct  virtchnl_channel_info list[1];
 524 };
 525
 526 VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_tc_info);
 527
 528 /* VIRTCHNL_ADD_CLOUD_FILTER
 529  * VIRTCHNL_DEL_CLOUD_FILTER
 530  * VF sends these messages to add or delete a cloud filter based on the
 531  * user specified match and action filters. These structures encompass
 532  * all the information that the PF needs from the VF to add/delete a
 533  * cloud filter.
 534  */
 535
 536 struct virtchnl_l4_spec {
 537         u8      src_mac[ETH_ALEN];
 538         u8      dst_mac[ETH_ALEN];
 539         __be16  vlan_id;
 540         __be16  pad; /* reserved for future use */
 541         __be32  src_ip[4];
 542         __be32  dst_ip[4];
 543         __be16  src_port;
 544         __be16  dst_port;
 545 };
 546
 547 VIRTCHNL_CHECK_STRUCT_LEN(52, virtchnl_l4_spec);
 548
 549 union virtchnl_flow_spec {
 550         struct  virtchnl_l4_spec tcp_spec;
 551         u8      buffer[128]; /* reserved for future use */
 552 };
 553
 554 VIRTCHNL_CHECK_UNION_LEN(128, virtchnl_flow_spec);
 555
 556 enum virtchnl_action {
 557         /* action types */
 558         VIRTCHNL_ACTION_DROP = 0,
 559         VIRTCHNL_ACTION_TC_REDIRECT,
 560 };
 561
 562 enum virtchnl_flow_type {
 563         /* flow types */
 564         VIRTCHNL_TCP_V4_FLOW = 0,
 565         VIRTCHNL_TCP_V6_FLOW,
 566 };
 567
 568 struct virtchnl_filter {
 569         union   virtchnl_flow_spec data;
 570         union   virtchnl_flow_spec mask;
 571         enum    virtchnl_flow_type flow_type;
 572         enum    virtchnl_action action;
 573         u32     action_meta;
 574         u8      field_flags;
 575 };
 576
 577 VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);
 578
 579 /* VIRTCHNL_OP_EVENT
 580  * PF sends this message to inform the VF driver of events that may affect it.
 581  * No direct response is expected from the VF, though it may generate other
 582  * messages in response to this one.
 583  */
 584 enum virtchnl_event_codes {
 585         VIRTCHNL_EVENT_UNKNOWN = 0,
 586         VIRTCHNL_EVENT_LINK_CHANGE,
 587         VIRTCHNL_EVENT_RESET_IMPENDING,
 588         VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
 589 };
 590
 591 #define PF_EVENT_SEVERITY_INFO          0
 592 #define PF_EVENT_SEVERITY_CERTAIN_DOOM  255
 593
 594 struct virtchnl_pf_event {
 595         enum virtchnl_event_codes event;
 596         union {
 597                 /* If the PF driver does not support the new speed reporting
 598                  * capabilities then use link_event else use link_event_adv to
 599                  * get the speed and link information. The ability to understand
 600                  * new speeds is indicated by setting the capability flag
 601                  * VIRTCHNL_VF_CAP_ADV_LINK_SPEED in vf_cap_flags parameter
 602                  * in virtchnl_vf_resource struct and can be used to determine
 603                  * which link event struct to use below.
 604                  */
 605                 struct {
 606                         enum virtchnl_link_speed link_speed;
 607                         bool link_status;
 608                 } link_event;
 609                 struct {
 610                         /* link_speed provided in Mbps */
 611                         u32 link_speed;
 612                         u8 link_status;
 613                 } link_event_adv;
 614         } event_data;
 615
 616         int severity;
 617 };
 618
 619 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);
 620
 621 /* VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP
 622  * VF uses this message to request PF to map IWARP vectors to IWARP queues.
 623  * The request for this originates from the VF IWARP driver through
 624  * a client interface between VF LAN and VF IWARP driver.
 625  * A vector could have an AEQ and CEQ attached to it although
 626  * there is a single AEQ per VF IWARP instance in which case
 627  * most vectors will have an INVALID_IDX for aeq and valid idx for ceq.
 628  * There will never be a case where there will be multiple CEQs attached
 629  * to a single vector.
 630  * PF configures interrupt mapping and returns status.
 631  */
 632
 633 struct virtchnl_iwarp_qv_info {
 634         u32 v_idx; /* msix_vector */
 635         u16 ceq_idx;
 636         u16 aeq_idx;
 637         u8 itr_idx;
 638 };
 639
 640 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info);
 641
 642 struct virtchnl_iwarp_qvlist_info {
 643         u32 num_vectors;
 644         struct virtchnl_iwarp_qv_info qv_info[1];
 645 };
 646
 647 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info);
 648
 649 /* VF reset states - these are written into the RSTAT register:
 650  * VFGEN_RSTAT on the VF
 651  * When the PF initiates a reset, it writes 0
 652  * When the reset is complete, it writes 1
 653  * When the PF detects that the VF has recovered, it writes 2
 654  * VF checks this register periodically to determine if a reset has occurred,
 655  * then polls it to know when the reset is complete.
 656  * If either the PF or VF reads the register while the hardware
 657  * is in a reset state, it will return DEADBEEF, which, when masked
 658  * will result in 3.
 659  */
 660 enum virtchnl_vfr_states {
 661         VIRTCHNL_VFR_INPROGRESS = 0,
 662         VIRTCHNL_VFR_COMPLETED,
 663         VIRTCHNL_VFR_VFACTIVE,
 664 };
 665
 666 /**
 667  * virtchnl_vc_validate_vf_msg
 668  * @ver: Virtchnl version info
 669  * @v_opcode: Opcode for the message
 670  * @msg: pointer to the msg buffer
 671  * @msglen: msg length
 672  *
 673  * validate msg format against struct for each opcode
 674  */
 675 static inline int
 676 virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
 677                             u8 *msg, u16 msglen)
 678 {
 679         bool err_msg_format = false;
 680         int valid_len = 0;
 681
 682         /* Validate message length. */
 683         switch (v_opcode) {
 684         case VIRTCHNL_OP_VERSION:
 685                 valid_len = sizeof(struct virtchnl_version_info);
 686                 break;
 687         case VIRTCHNL_OP_RESET_VF:
 688                 break;
 689         case VIRTCHNL_OP_GET_VF_RESOURCES:
 690                 if (VF_IS_V11(ver))
 691                         valid_len = sizeof(u32);
 692                 break;
 693         case VIRTCHNL_OP_CONFIG_TX_QUEUE:
 694                 valid_len = sizeof(struct virtchnl_txq_info);
 695                 break;
 696         case VIRTCHNL_OP_CONFIG_RX_QUEUE:
 697                 valid_len = sizeof(struct virtchnl_rxq_info);
 698                 break;
 699         case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
 700                 valid_len = sizeof(struct virtchnl_vsi_queue_config_info);
 701                 if (msglen >= valid_len) {
 702                         struct virtchnl_vsi_queue_config_info *vqc =
 703                             (struct virtchnl_vsi_queue_config_info *)msg;
 704                         valid_len += (vqc->num_queue_pairs *
 705                                       sizeof(struct
 706                                              virtchnl_queue_pair_info));
 707                         if (vqc->num_queue_pairs == 0)
 708                                 err_msg_format = true;
 709                 }
 710                 break;
 711         case VIRTCHNL_OP_CONFIG_IRQ_MAP:
 712                 valid_len = sizeof(struct virtchnl_irq_map_info);
 713                 if (msglen >= valid_len) {
 714                         struct virtchnl_irq_map_info *vimi =
 715                             (struct virtchnl_irq_map_info *)msg;
 716                         valid_len += (vimi->num_vectors *
 717                                       sizeof(struct virtchnl_vector_map));
 718                         if (vimi->num_vectors == 0)
 719                                 err_msg_format = true;
 720                 }
 721                 break;
 722         case VIRTCHNL_OP_ENABLE_QUEUES:
 723         case VIRTCHNL_OP_DISABLE_QUEUES:
 724                 valid_len = sizeof(struct virtchnl_queue_select);
 725                 break;
 726         case VIRTCHNL_OP_ADD_ETH_ADDR:
 727         case VIRTCHNL_OP_DEL_ETH_ADDR:
 728                 valid_len = sizeof(struct virtchnl_ether_addr_list);
 729                 if (msglen >= valid_len) {
 730                         struct virtchnl_ether_addr_list *veal =
 731                             (struct virtchnl_ether_addr_list *)msg;
 732                         valid_len += veal->num_elements *
 733                             sizeof(struct virtchnl_ether_addr);
 734                         if (veal->num_elements == 0)
 735                                 err_msg_format = true;
 736                 }
 737                 break;
 738         case VIRTCHNL_OP_ADD_VLAN:
 739         case VIRTCHNL_OP_DEL_VLAN:
 740                 valid_len = sizeof(struct virtchnl_vlan_filter_list);
 741                 if (msglen >= valid_len) {
 742                         struct virtchnl_vlan_filter_list *vfl =
 743                             (struct virtchnl_vlan_filter_list *)msg;
 744                         valid_len += vfl->num_elements * sizeof(u16);
 745                         if (vfl->num_elements == 0)
 746                                 err_msg_format = true;
 747                 }
 748                 break;
 749         case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
 750                 valid_len = sizeof(struct virtchnl_promisc_info);
 751                 break;
 752         case VIRTCHNL_OP_GET_STATS:
 753                 valid_len = sizeof(struct virtchnl_queue_select);
 754                 break;
 755         case VIRTCHNL_OP_IWARP:
 756                 /* These messages are opaque to us and will be validated in
 757                  * the RDMA client code. We just need to check for nonzero
 758                  * length. The firmware will enforce max length restrictions.
 759                  */
 760                 if (msglen)
 761                         valid_len = msglen;
 762                 else
 763                         err_msg_format = true;
 764                 break;
 765         case VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
 766                 break;
 767         case VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP:
 768                 valid_len = sizeof(struct virtchnl_iwarp_qvlist_info);
 769                 if (msglen >= valid_len) {
 770                         struct virtchnl_iwarp_qvlist_info *qv =
 771                                 (struct virtchnl_iwarp_qvlist_info *)msg;
 772                         if (qv->num_vectors == 0) {
 773                                 err_msg_format = true;
 774                                 break;
 775                         }
 776                         valid_len += ((qv->num_vectors - 1) *
 777                                 sizeof(struct virtchnl_iwarp_qv_info));
 778                 }
 779                 break;
 780         case VIRTCHNL_OP_CONFIG_RSS_KEY:
 781                 valid_len = sizeof(struct virtchnl_rss_key);
 782                 if (msglen >= valid_len) {
 783                         struct virtchnl_rss_key *vrk =
 784                                 (struct virtchnl_rss_key *)msg;
 785                         valid_len += vrk->key_len - 1;
 786                 }
 787                 break;
 788         case VIRTCHNL_OP_CONFIG_RSS_LUT:
 789                 valid_len = sizeof(struct virtchnl_rss_lut);
 790                 if (msglen >= valid_len) {
 791                         struct virtchnl_rss_lut *vrl =
 792                                 (struct virtchnl_rss_lut *)msg;
 793                         valid_len += vrl->lut_entries - 1;
 794                 }
 795                 break;
 796         case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
 797                 break;
 798         case VIRTCHNL_OP_SET_RSS_HENA:
 799                 valid_len = sizeof(struct virtchnl_rss_hena);
 800                 break;
 801         case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
 802         case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
 803                 break;
 804         case VIRTCHNL_OP_REQUEST_QUEUES:
 805                 valid_len = sizeof(struct virtchnl_vf_res_request);
 806                 break;
 807         case VIRTCHNL_OP_ENABLE_CHANNELS:
 808                 valid_len = sizeof(struct virtchnl_tc_info);
 809                 if (msglen >= valid_len) {
 810                         struct virtchnl_tc_info *vti =
 811                                 (struct virtchnl_tc_info *)msg;
 812                         valid_len += (vti->num_tc - 1) *
 813                                      sizeof(struct virtchnl_channel_info);
 814                         if (vti->num_tc == 0)
 815                                 err_msg_format = true;
 816                 }
 817                 break;
 818         case VIRTCHNL_OP_DISABLE_CHANNELS:
 819                 break;
 820         case VIRTCHNL_OP_ADD_CLOUD_FILTER:
 821                 valid_len = sizeof(struct virtchnl_filter);
 822                 break;
 823         case VIRTCHNL_OP_DEL_CLOUD_FILTER:
 824                 valid_len = sizeof(struct virtchnl_filter);
 825                 break;
 826         /* These are always errors coming from the VF. */
 827         case VIRTCHNL_OP_EVENT:
 828         case VIRTCHNL_OP_UNKNOWN:
 829         default:
 830                 return VIRTCHNL_STATUS_ERR_PARAM;
 831         }
 832         /* few more checks */
 833         if (err_msg_format || valid_len != msglen)
 834                 return VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH;
 835
 836         return 0;
 837 }
 838 #endif /* _VIRTCHNL_H_ */