drivers/net/ethernet/intel/i40e/i40e_virtchnl.h

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  25  ******************************************************************************/
  26
  27 #ifndef _I40E_VIRTCHNL_H_
  28 #define _I40E_VIRTCHNL_H_
  29
  30 #include "i40e_type.h"
  31
  32 /* Description:
  33  * This header file describes the VF-PF communication protocol used
  34  * by the various i40e drivers.
  35  *
  36  * Admin queue buffer usage:
  37  * desc->opcode is always i40e_aqc_opc_send_msg_to_pf
  38  * flags, retval, datalen, and data addr are all used normally.
  39  * Firmware copies the cookie fields when sending messages between the PF and
  40  * VF, but uses all other fields internally. Due to this limitation, we
  41  * must send all messages as "indirect", i.e. using an external buffer.
  42  *
  43  * All the vsi indexes are relative to the VF. Each VF can have maximum of
  44  * three VSIs. All the queue indexes are relative to the VSI.  Each VF can
  45  * have a maximum of sixteen queues for all of its VSIs.
  46  *
  47  * The PF is required to return a status code in v_retval for all messages
  48  * except RESET_VF, which does not require any response. The return value is of
  49  * i40e_status_code type, defined in the i40e_type.h.
  50  *
  51  * In general, VF driver initialization should roughly follow the order of these
  52  * opcodes. The VF driver must first validate the API version of the PF driver,
  53  * then request a reset, then get resources, then configure queues and
  54  * interrupts. After these operations are complete, the VF driver may start
  55  * its queues, optionally add MAC and VLAN filters, and process traffic.
  56  */
  57
  58 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
  59  * of the virtchnl_msg structure.
  60  */
  61 enum i40e_virtchnl_ops {
  62 /* VF sends req. to pf for the following
  63  * ops.
  64  */
  65         I40E_VIRTCHNL_OP_UNKNOWN = 0,
  66         I40E_VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
  67         I40E_VIRTCHNL_OP_RESET_VF,
  68         I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
  69         I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE,
  70         I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE,
  71         I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
  72         I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
  73         I40E_VIRTCHNL_OP_ENABLE_QUEUES,
  74         I40E_VIRTCHNL_OP_DISABLE_QUEUES,
  75         I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
  76         I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
  77         I40E_VIRTCHNL_OP_ADD_VLAN,
  78         I40E_VIRTCHNL_OP_DEL_VLAN,
  79         I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
  80         I40E_VIRTCHNL_OP_GET_STATS,
  81         I40E_VIRTCHNL_OP_FCOE,
  82 /* PF sends status change events to vfs using
  83  * the following op.
  84  */
  85         I40E_VIRTCHNL_OP_EVENT,
  86 };
  87
  88 /* Virtual channel message descriptor. This overlays the admin queue
  89  * descriptor. All other data is passed in external buffers.
  90  */
  91
  92 struct i40e_virtchnl_msg {
  93         u8 pad[8];                       /* AQ flags/opcode/len/retval fields */
  94         enum i40e_virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
  95         i40e_status v_retval;  /* ditto for desc->retval */
  96         u32 vfid;                        /* used by PF when sending to VF */
  97 };
  98
  99 /* Message descriptions and data structures.*/
 100
 101 /* I40E_VIRTCHNL_OP_VERSION
 102  * VF posts its version number to the PF. PF responds with its version number
 103  * in the same format, along with a return code.
 104  * Reply from PF has its major/minor versions also in param0 and param1.
 105  * If there is a major version mismatch, then the VF cannot operate.
 106  * If there is a minor version mismatch, then the VF can operate but should
 107  * add a warning to the system log.
 108  *
 109  * This enum element MUST always be specified as == 1, regardless of other
 110  * changes in the API. The PF must always respond to this message without
 111  * error regardless of version mismatch.
 112  */
 113 #define I40E_VIRTCHNL_VERSION_MAJOR             1
 114 #define I40E_VIRTCHNL_VERSION_MINOR             0
 115 struct i40e_virtchnl_version_info {
 116         u32 major;
 117         u32 minor;
 118 };
 119
 120 /* I40E_VIRTCHNL_OP_RESET_VF
 121  * VF sends this request to PF with no parameters
 122  * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
 123  * until reset completion is indicated. The admin queue must be reinitialized
 124  * after this operation.
 125  *
 126  * When reset is complete, PF must ensure that all queues in all VSIs associated
 127  * with the VF are stopped, all queue configurations in the HMC are set to 0,
 128  * and all MAC and VLAN filters (except the default MAC address) on all VSIs
 129  * are cleared.
 130  */
 131
 132 /* I40E_VIRTCHNL_OP_GET_VF_RESOURCES
 133  * VF sends this request to PF with no parameters
 134  * PF responds with an indirect message containing
 135  * i40e_virtchnl_vf_resource and one or more
 136  * i40e_virtchnl_vsi_resource structures.
 137  */
 138
 139 struct i40e_virtchnl_vsi_resource {
 140         u16 vsi_id;
 141         u16 num_queue_pairs;
 142         enum i40e_vsi_type vsi_type;
 143         u16 qset_handle;
 144         u8 default_mac_addr[ETH_ALEN];
 145 };
 146 /* VF offload flags */
 147 #define I40E_VIRTCHNL_VF_OFFLOAD_L2     0x00000001
 148 #define I40E_VIRTCHNL_VF_OFFLOAD_FCOE   0x00000004
 149 #define I40E_VIRTCHNL_VF_OFFLOAD_VLAN   0x00010000
 150
 151 struct i40e_virtchnl_vf_resource {
 152         u16 num_vsis;
 153         u16 num_queue_pairs;
 154         u16 max_vectors;
 155         u16 max_mtu;
 156
 157         u32 vf_offload_flags;
 158         u32 max_fcoe_contexts;
 159         u32 max_fcoe_filters;
 160
 161         struct i40e_virtchnl_vsi_resource vsi_res[1];
 162 };
 163
 164 /* I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE
 165  * VF sends this message to set up parameters for one TX queue.
 166  * External data buffer contains one instance of i40e_virtchnl_txq_info.
 167  * PF configures requested queue and returns a status code.
 168  */
 169
 170 /* Tx queue config info */
 171 struct i40e_virtchnl_txq_info {
 172         u16 vsi_id;
 173         u16 queue_id;
 174         u16 ring_len;           /* number of descriptors, multiple of 8 */
 175         u16 headwb_enabled;
 176         u64 dma_ring_addr;
 177         u64 dma_headwb_addr;
 178 };
 179
 180 /* I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE
 181  * VF sends this message to set up parameters for one RX queue.
 182  * External data buffer contains one instance of i40e_virtchnl_rxq_info.
 183  * PF configures requested queue and returns a status code.
 184  */
 185
 186 /* Rx queue config info */
 187 struct i40e_virtchnl_rxq_info {
 188         u16 vsi_id;
 189         u16 queue_id;
 190         u32 ring_len;           /* number of descriptors, multiple of 32 */
 191         u16 hdr_size;
 192         u16 splithdr_enabled;
 193         u32 databuffer_size;
 194         u32 max_pkt_size;
 195         u64 dma_ring_addr;
 196         enum i40e_hmc_obj_rx_hsplit_0 rx_split_pos;
 197 };
 198
 199 /* I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES
 200  * VF sends this message to set parameters for all active TX and RX queues
 201  * associated with the specified VSI.
 202  * PF configures queues and returns status.
 203  * If the number of queues specified is greater than the number of queues
 204  * associated with the VSI, an error is returned and no queues are configured.
 205  */
 206 struct i40e_virtchnl_queue_pair_info {
 207         /* NOTE: vsi_id and queue_id should be identical for both queues. */
 208         struct i40e_virtchnl_txq_info txq;
 209         struct i40e_virtchnl_rxq_info rxq;
 210 };
 211
 212 struct i40e_virtchnl_vsi_queue_config_info {
 213         u16 vsi_id;
 214         u16 num_queue_pairs;
 215         struct i40e_virtchnl_queue_pair_info qpair[1];
 216 };
 217
 218 /* I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP
 219  * VF uses this message to map vectors to queues.
 220  * The rxq_map and txq_map fields are bitmaps used to indicate which queues
 221  * are to be associated with the specified vector.
 222  * The "other" causes are always mapped to vector 0.
 223  * PF configures interrupt mapping and returns status.
 224  */
 225 struct i40e_virtchnl_vector_map {
 226         u16 vsi_id;
 227         u16 vector_id;
 228         u16 rxq_map;
 229         u16 txq_map;
 230         u16 rxitr_idx;
 231         u16 txitr_idx;
 232 };
 233
 234 struct i40e_virtchnl_irq_map_info {
 235         u16 num_vectors;
 236         struct i40e_virtchnl_vector_map vecmap[1];
 237 };
 238
 239 /* I40E_VIRTCHNL_OP_ENABLE_QUEUES
 240  * I40E_VIRTCHNL_OP_DISABLE_QUEUES
 241  * VF sends these message to enable or disable TX/RX queue pairs.
 242  * The queues fields are bitmaps indicating which queues to act upon.
 243  * (Currently, we only support 16 queues per VF, but we make the field
 244  * u32 to allow for expansion.)
 245  * PF performs requested action and returns status.
 246  */
 247 struct i40e_virtchnl_queue_select {
 248         u16 vsi_id;
 249         u16 pad;
 250         u32 rx_queues;
 251         u32 tx_queues;
 252 };
 253
 254 /* I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS
 255  * VF sends this message in order to add one or more unicast or multicast
 256  * address filters for the specified VSI.
 257  * PF adds the filters and returns status.
 258  */
 259
 260 /* I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS
 261  * VF sends this message in order to remove one or more unicast or multicast
 262  * filters for the specified VSI.
 263  * PF removes the filters and returns status.
 264  */
 265
 266 struct i40e_virtchnl_ether_addr {
 267         u8 addr[ETH_ALEN];
 268         u8 pad[2];
 269 };
 270
 271 struct i40e_virtchnl_ether_addr_list {
 272         u16 vsi_id;
 273         u16 num_elements;
 274         struct i40e_virtchnl_ether_addr list[1];
 275 };
 276
 277 /* I40E_VIRTCHNL_OP_ADD_VLAN
 278  * VF sends this message to add one or more VLAN tag filters for receives.
 279  * PF adds the filters and returns status.
 280  * If a port VLAN is configured by the PF, this operation will return an
 281  * error to the VF.
 282  */
 283
 284 /* I40E_VIRTCHNL_OP_DEL_VLAN
 285  * VF sends this message to remove one or more VLAN tag filters for receives.
 286  * PF removes the filters and returns status.
 287  * If a port VLAN is configured by the PF, this operation will return an
 288  * error to the VF.
 289  */
 290
 291 struct i40e_virtchnl_vlan_filter_list {
 292         u16 vsi_id;
 293         u16 num_elements;
 294         u16 vlan_id[1];
 295 };
 296
 297 /* I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
 298  * VF sends VSI id and flags.
 299  * PF returns status code in retval.
 300  * Note: we assume that broadcast accept mode is always enabled.
 301  */
 302 struct i40e_virtchnl_promisc_info {
 303         u16 vsi_id;
 304         u16 flags;
 305 };
 306
 307 #define I40E_FLAG_VF_UNICAST_PROMISC    0x00000001
 308 #define I40E_FLAG_VF_MULTICAST_PROMISC  0x00000002
 309
 310 /* I40E_VIRTCHNL_OP_GET_STATS
 311  * VF sends this message to request stats for the selected VSI. VF uses
 312  * the i40e_virtchnl_queue_select struct to specify the VSI. The queue_id
 313  * field is ignored by the PF.
 314  *
 315  * PF replies with struct i40e_eth_stats in an external buffer.
 316  */
 317
 318 /* I40E_VIRTCHNL_OP_EVENT
 319  * PF sends this message to inform the VF driver of events that may affect it.
 320  * No direct response is expected from the VF, though it may generate other
 321  * messages in response to this one.
 322  */
 323 enum i40e_virtchnl_event_codes {
 324         I40E_VIRTCHNL_EVENT_UNKNOWN = 0,
 325         I40E_VIRTCHNL_EVENT_LINK_CHANGE,
 326         I40E_VIRTCHNL_EVENT_RESET_IMPENDING,
 327         I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
 328 };
 329 #define I40E_PF_EVENT_SEVERITY_INFO             0
 330 #define I40E_PF_EVENT_SEVERITY_CERTAIN_DOOM     255
 331
 332 struct i40e_virtchnl_pf_event {
 333         enum i40e_virtchnl_event_codes event;
 334         union {
 335                 struct {
 336                         enum i40e_aq_link_speed link_speed;
 337                         bool link_status;
 338                 } link_event;
 339         } event_data;
 340
 341         int severity;
 342 };
 343
 344 /* VF reset states - these are written into the RSTAT register:
 345  * I40E_VFGEN_RSTAT1 on the PF
 346  * I40E_VFGEN_RSTAT on the VF
 347  * When the PF initiates a reset, it writes 0
 348  * When the reset is complete, it writes 1
 349  * When the PF detects that the VF has recovered, it writes 2
 350  * VF checks this register periodically to determine if a reset has occurred,
 351  * then polls it to know when the reset is complete.
 352  * If either the PF or VF reads the register while the hardware
 353  * is in a reset state, it will return DEADBEEF, which, when masked
 354  * will result in 3.
 355  */
 356 enum i40e_vfr_states {
 357         I40E_VFR_INPROGRESS = 0,
 358         I40E_VFR_COMPLETED,
 359         I40E_VFR_VFACTIVE,
 360         I40E_VFR_UNKNOWN,
 361 };
 362
 363 #endif /* _I40E_VIRTCHNL_H_ */