1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2001-2020
9 * This header file describes the VF-PF communication protocol used
10 * by the drivers for all devices starting from our 40G product line
12 * Admin queue buffer usage:
13 * desc->opcode is always aqc_opc_send_msg_to_pf
14 * flags, retval, datalen, and data addr are all used normally.
15 * The Firmware copies the cookie fields when sending messages between the
16 * PF and VF, but uses all other fields internally. Due to this limitation,
17 * we must send all messages as "indirect", i.e. using an external buffer.
19 * All the VSI indexes are relative to the VF. Each VF can have maximum of
20 * three VSIs. All the queue indexes are relative to the VSI. Each VF can
21 * have a maximum of sixteen queues for all of its VSIs.
23 * The PF is required to return a status code in v_retval for all messages
24 * except RESET_VF, which does not require any response. The return value
25 * is of status_code type, defined in the shared type.h.
27 * In general, VF driver initialization should roughly follow the order of
28 * these opcodes. The VF driver must first validate the API version of the
29 * PF driver, then request a reset, then get resources, then configure
30 * queues and interrupts. After these operations are complete, the VF
31 * driver may start its queues, optionally add MAC and VLAN filters, and
35 /* START GENERIC DEFINES
36 * Need to ensure the following enums and defines hold the same meaning and
37 * value in current and future projects
41 enum virtchnl_status_code {
42 VIRTCHNL_STATUS_SUCCESS = 0,
43 VIRTCHNL_STATUS_ERR_PARAM = -5,
44 VIRTCHNL_STATUS_ERR_NO_MEMORY = -18,
45 VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH = -38,
46 VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR = -39,
47 VIRTCHNL_STATUS_ERR_INVALID_VF_ID = -40,
48 VIRTCHNL_STATUS_ERR_ADMIN_QUEUE_ERROR = -53,
49 VIRTCHNL_STATUS_ERR_NOT_SUPPORTED = -64,
52 /* Backward compatibility */
53 #define VIRTCHNL_ERR_PARAM VIRTCHNL_STATUS_ERR_PARAM
54 #define VIRTCHNL_STATUS_NOT_SUPPORTED VIRTCHNL_STATUS_ERR_NOT_SUPPORTED
56 #define VIRTCHNL_LINK_SPEED_2_5GB_SHIFT 0x0
57 #define VIRTCHNL_LINK_SPEED_100MB_SHIFT 0x1
58 #define VIRTCHNL_LINK_SPEED_1000MB_SHIFT 0x2
59 #define VIRTCHNL_LINK_SPEED_10GB_SHIFT 0x3
60 #define VIRTCHNL_LINK_SPEED_40GB_SHIFT 0x4
61 #define VIRTCHNL_LINK_SPEED_20GB_SHIFT 0x5
62 #define VIRTCHNL_LINK_SPEED_25GB_SHIFT 0x6
63 #define VIRTCHNL_LINK_SPEED_5GB_SHIFT 0x7
65 enum virtchnl_link_speed {
66 VIRTCHNL_LINK_SPEED_UNKNOWN = 0,
67 VIRTCHNL_LINK_SPEED_100MB = BIT(VIRTCHNL_LINK_SPEED_100MB_SHIFT),
68 VIRTCHNL_LINK_SPEED_1GB = BIT(VIRTCHNL_LINK_SPEED_1000MB_SHIFT),
69 VIRTCHNL_LINK_SPEED_10GB = BIT(VIRTCHNL_LINK_SPEED_10GB_SHIFT),
70 VIRTCHNL_LINK_SPEED_40GB = BIT(VIRTCHNL_LINK_SPEED_40GB_SHIFT),
71 VIRTCHNL_LINK_SPEED_20GB = BIT(VIRTCHNL_LINK_SPEED_20GB_SHIFT),
72 VIRTCHNL_LINK_SPEED_25GB = BIT(VIRTCHNL_LINK_SPEED_25GB_SHIFT),
73 VIRTCHNL_LINK_SPEED_2_5GB = BIT(VIRTCHNL_LINK_SPEED_2_5GB_SHIFT),
74 VIRTCHNL_LINK_SPEED_5GB = BIT(VIRTCHNL_LINK_SPEED_5GB_SHIFT),
77 /* for hsplit_0 field of Rx HMC context */
78 /* deprecated with IAVF 1.0 */
79 enum virtchnl_rx_hsplit {
80 VIRTCHNL_RX_HSPLIT_NO_SPLIT = 0,
81 VIRTCHNL_RX_HSPLIT_SPLIT_L2 = 1,
82 VIRTCHNL_RX_HSPLIT_SPLIT_IP = 2,
83 VIRTCHNL_RX_HSPLIT_SPLIT_TCP_UDP = 4,
84 VIRTCHNL_RX_HSPLIT_SPLIT_SCTP = 8,
87 #define VIRTCHNL_ETH_LENGTH_OF_ADDRESS 6
88 /* END GENERIC DEFINES */
90 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
91 * of the virtchnl_msg structure.
94 /* The PF sends status change events to VFs using
95 * the VIRTCHNL_OP_EVENT opcode.
96 * VFs send requests to the PF using the other ops.
97 * Use of "advanced opcode" features must be negotiated as part of capabilities
98 * exchange and are not considered part of base mode feature set.
100 VIRTCHNL_OP_UNKNOWN = 0,
101 VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
102 VIRTCHNL_OP_RESET_VF = 2,
103 VIRTCHNL_OP_GET_VF_RESOURCES = 3,
104 VIRTCHNL_OP_CONFIG_TX_QUEUE = 4,
105 VIRTCHNL_OP_CONFIG_RX_QUEUE = 5,
106 VIRTCHNL_OP_CONFIG_VSI_QUEUES = 6,
107 VIRTCHNL_OP_CONFIG_IRQ_MAP = 7,
108 VIRTCHNL_OP_ENABLE_QUEUES = 8,
109 VIRTCHNL_OP_DISABLE_QUEUES = 9,
110 VIRTCHNL_OP_ADD_ETH_ADDR = 10,
111 VIRTCHNL_OP_DEL_ETH_ADDR = 11,
112 VIRTCHNL_OP_ADD_VLAN = 12,
113 VIRTCHNL_OP_DEL_VLAN = 13,
114 VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
115 VIRTCHNL_OP_GET_STATS = 15,
116 VIRTCHNL_OP_RSVD = 16,
117 VIRTCHNL_OP_EVENT = 17, /* must ALWAYS be 17 */
118 /* opcode 19 is reserved */
119 /* opcodes 20, 21, and 22 are reserved */
120 VIRTCHNL_OP_CONFIG_RSS_KEY = 23,
121 VIRTCHNL_OP_CONFIG_RSS_LUT = 24,
122 VIRTCHNL_OP_GET_RSS_HENA_CAPS = 25,
123 VIRTCHNL_OP_SET_RSS_HENA = 26,
124 VIRTCHNL_OP_ENABLE_VLAN_STRIPPING = 27,
125 VIRTCHNL_OP_DISABLE_VLAN_STRIPPING = 28,
126 VIRTCHNL_OP_REQUEST_QUEUES = 29,
127 VIRTCHNL_OP_ENABLE_CHANNELS = 30,
128 VIRTCHNL_OP_DISABLE_CHANNELS = 31,
129 VIRTCHNL_OP_ADD_CLOUD_FILTER = 32,
130 VIRTCHNL_OP_DEL_CLOUD_FILTER = 33,
131 /* opcodes 34, 35, 36, 37 and 38 are reserved */
132 VIRTCHNL_OP_DCF_CMD_DESC = 39,
133 VIRTCHNL_OP_DCF_CMD_BUFF = 40,
136 /* These macros are used to generate compilation errors if a structure/union
137 * is not exactly the correct length. It gives a divide by zero error if the
138 * structure/union is not of the correct size, otherwise it creates an enum
139 * that is never used.
141 #define VIRTCHNL_CHECK_STRUCT_LEN(n, X) enum virtchnl_static_assert_enum_##X \
142 { virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
143 #define VIRTCHNL_CHECK_UNION_LEN(n, X) enum virtchnl_static_asset_enum_##X \
144 { virtchnl_static_assert_##X = (n)/((sizeof(union X) == (n)) ? 1 : 0) }
146 /* Virtual channel message descriptor. This overlays the admin queue
147 * descriptor. All other data is passed in external buffers.
150 struct virtchnl_msg {
151 u8 pad[8]; /* AQ flags/opcode/len/retval fields */
152 enum virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
153 enum virtchnl_status_code v_retval; /* ditto for desc->retval */
154 u32 vfid; /* used by PF when sending to VF */
157 VIRTCHNL_CHECK_STRUCT_LEN(20, virtchnl_msg);
159 /* Message descriptions and data structures. */
161 /* VIRTCHNL_OP_VERSION
162 * VF posts its version number to the PF. PF responds with its version number
163 * in the same format, along with a return code.
164 * Reply from PF has its major/minor versions also in param0 and param1.
165 * If there is a major version mismatch, then the VF cannot operate.
166 * If there is a minor version mismatch, then the VF can operate but should
167 * add a warning to the system log.
169 * This enum element MUST always be specified as == 1, regardless of other
170 * changes in the API. The PF must always respond to this message without
171 * error regardless of version mismatch.
173 #define VIRTCHNL_VERSION_MAJOR 1
174 #define VIRTCHNL_VERSION_MINOR 1
175 #define VIRTCHNL_VERSION_MINOR_NO_VF_CAPS 0
177 struct virtchnl_version_info {
182 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_version_info);
184 #define VF_IS_V10(_v) (((_v)->major == 1) && ((_v)->minor == 0))
185 #define VF_IS_V11(_ver) (((_ver)->major == 1) && ((_ver)->minor == 1))
187 /* VIRTCHNL_OP_RESET_VF
188 * VF sends this request to PF with no parameters
189 * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
190 * until reset completion is indicated. The admin queue must be reinitialized
191 * after this operation.
193 * When reset is complete, PF must ensure that all queues in all VSIs associated
194 * with the VF are stopped, all queue configurations in the HMC are set to 0,
195 * and all MAC and VLAN filters (except the default MAC address) on all VSIs
199 /* VSI types that use VIRTCHNL interface for VF-PF communication. VSI_SRIOV
200 * vsi_type should always be 6 for backward compatibility. Add other fields
203 enum virtchnl_vsi_type {
204 VIRTCHNL_VSI_TYPE_INVALID = 0,
205 VIRTCHNL_VSI_SRIOV = 6,
208 /* VIRTCHNL_OP_GET_VF_RESOURCES
209 * Version 1.0 VF sends this request to PF with no parameters
210 * Version 1.1 VF sends this request to PF with u32 bitmap of its capabilities
211 * PF responds with an indirect message containing
212 * virtchnl_vf_resource and one or more
213 * virtchnl_vsi_resource structures.
216 struct virtchnl_vsi_resource {
219 enum virtchnl_vsi_type vsi_type;
221 u8 default_mac_addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
224 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);
226 /* VF capability flags
227 * VIRTCHNL_VF_OFFLOAD_L2 flag is inclusive of base mode L2 offloads including
228 * TX/RX Checksum offloading and TSO for non-tunnelled packets.
230 #define VIRTCHNL_VF_OFFLOAD_L2 0x00000001
231 #define VIRTCHNL_VF_OFFLOAD_IWARP 0x00000002
232 #define VIRTCHNL_VF_OFFLOAD_RSVD 0x00000004
233 #define VIRTCHNL_VF_OFFLOAD_RSS_AQ 0x00000008
234 #define VIRTCHNL_VF_OFFLOAD_RSS_REG 0x00000010
235 #define VIRTCHNL_VF_OFFLOAD_WB_ON_ITR 0x00000020
236 #define VIRTCHNL_VF_OFFLOAD_REQ_QUEUES 0x00000040
237 #define VIRTCHNL_VF_OFFLOAD_CRC 0x00000080
238 #define VIRTCHNL_VF_OFFLOAD_VLAN 0x00010000
239 #define VIRTCHNL_VF_OFFLOAD_RX_POLLING 0x00020000
240 #define VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2 0x00040000
241 #define VIRTCHNL_VF_OFFLOAD_RSS_PF 0X00080000
242 #define VIRTCHNL_VF_OFFLOAD_ENCAP 0X00100000
243 #define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM 0X00200000
244 #define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM 0X00400000
245 #define VIRTCHNL_VF_OFFLOAD_ADQ 0X00800000
246 #define VIRTCHNL_VF_OFFLOAD_ADQ_V2 0X01000000
247 #define VIRTCHNL_VF_OFFLOAD_USO 0X02000000
248 /* 0X80000000 is reserved */
250 /* Define below the capability flags that are not offloads */
251 #define VIRTCHNL_VF_CAP_ADV_LINK_SPEED 0x00000080
252 #define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
253 VIRTCHNL_VF_OFFLOAD_VLAN | \
254 VIRTCHNL_VF_OFFLOAD_RSS_PF)
256 struct virtchnl_vf_resource {
266 struct virtchnl_vsi_resource vsi_res[1];
269 VIRTCHNL_CHECK_STRUCT_LEN(36, virtchnl_vf_resource);
271 /* VIRTCHNL_OP_CONFIG_TX_QUEUE
272 * VF sends this message to set up parameters for one TX queue.
273 * External data buffer contains one instance of virtchnl_txq_info.
274 * PF configures requested queue and returns a status code.
277 /* Tx queue config info */
278 struct virtchnl_txq_info {
281 u16 ring_len; /* number of descriptors, multiple of 8 */
282 u16 headwb_enabled; /* deprecated with AVF 1.0 */
284 u64 dma_headwb_addr; /* deprecated with AVF 1.0 */
287 VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_txq_info);
289 /* VIRTCHNL_OP_CONFIG_RX_QUEUE
290 * VF sends this message to set up parameters for one RX queue.
291 * External data buffer contains one instance of virtchnl_rxq_info.
292 * PF configures requested queue and returns a status code. The
293 * crc_disable flag disables CRC stripping on the VF. Setting
294 * the crc_disable flag to 1 will disable CRC stripping for each
295 * queue in the VF where the flag is set. The VIRTCHNL_VF_OFFLOAD_CRC
296 * offload must have been set prior to sending this info or the PF
297 * will ignore the request. This flag should be set the same for
298 * all of the queues for a VF.
301 /* Rx queue config info */
302 struct virtchnl_rxq_info {
305 u32 ring_len; /* number of descriptors, multiple of 32 */
307 u16 splithdr_enabled; /* deprecated with AVF 1.0 */
313 enum virtchnl_rx_hsplit rx_split_pos; /* deprecated with AVF 1.0 */
317 VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_rxq_info);
319 /* VIRTCHNL_OP_CONFIG_VSI_QUEUES
320 * VF sends this message to set parameters for active TX and RX queues
321 * associated with the specified VSI.
322 * PF configures queues and returns status.
323 * If the number of queues specified is greater than the number of queues
324 * associated with the VSI, an error is returned and no queues are configured.
325 * NOTE: The VF is not required to configure all queues in a single request.
326 * It may send multiple messages. PF drivers must correctly handle all VF
329 struct virtchnl_queue_pair_info {
330 /* NOTE: vsi_id and queue_id should be identical for both queues. */
331 struct virtchnl_txq_info txq;
332 struct virtchnl_rxq_info rxq;
335 VIRTCHNL_CHECK_STRUCT_LEN(64, virtchnl_queue_pair_info);
337 struct virtchnl_vsi_queue_config_info {
341 struct virtchnl_queue_pair_info qpair[1];
344 VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_vsi_queue_config_info);
346 /* VIRTCHNL_OP_REQUEST_QUEUES
347 * VF sends this message to request the PF to allocate additional queues to
348 * this VF. Each VF gets a guaranteed number of queues on init but asking for
349 * additional queues must be negotiated. This is a best effort request as it
350 * is possible the PF does not have enough queues left to support the request.
351 * If the PF cannot support the number requested it will respond with the
352 * maximum number it is able to support. If the request is successful, PF will
353 * then reset the VF to institute required changes.
356 /* VF resource request */
357 struct virtchnl_vf_res_request {
361 /* VIRTCHNL_OP_CONFIG_IRQ_MAP
362 * VF uses this message to map vectors to queues.
363 * The rxq_map and txq_map fields are bitmaps used to indicate which queues
364 * are to be associated with the specified vector.
365 * The "other" causes are always mapped to vector 0. The VF may not request
366 * that vector 0 be used for traffic.
367 * PF configures interrupt mapping and returns status.
368 * NOTE: due to hardware requirements, all active queues (both TX and RX)
369 * should be mapped to interrupts, even if the driver intends to operate
370 * only in polling mode. In this case the interrupt may be disabled, but
371 * the ITR timer will still run to trigger writebacks.
373 struct virtchnl_vector_map {
382 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_vector_map);
384 struct virtchnl_irq_map_info {
386 struct virtchnl_vector_map vecmap[1];
389 VIRTCHNL_CHECK_STRUCT_LEN(14, virtchnl_irq_map_info);
391 /* VIRTCHNL_OP_ENABLE_QUEUES
392 * VIRTCHNL_OP_DISABLE_QUEUES
393 * VF sends these message to enable or disable TX/RX queue pairs.
394 * The queues fields are bitmaps indicating which queues to act upon.
395 * (Currently, we only support 16 queues per VF, but we make the field
396 * u32 to allow for expansion.)
397 * PF performs requested action and returns status.
398 * NOTE: The VF is not required to enable/disable all queues in a single
399 * request. It may send multiple messages.
400 * PF drivers must correctly handle all VF requests.
402 struct virtchnl_queue_select {
409 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_queue_select);
411 /* VIRTCHNL_OP_ADD_ETH_ADDR
412 * VF sends this message in order to add one or more unicast or multicast
413 * address filters for the specified VSI.
414 * PF adds the filters and returns status.
417 /* VIRTCHNL_OP_DEL_ETH_ADDR
418 * VF sends this message in order to remove one or more unicast or multicast
419 * filters for the specified VSI.
420 * PF removes the filters and returns status.
423 struct virtchnl_ether_addr {
424 u8 addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
428 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_ether_addr);
430 struct virtchnl_ether_addr_list {
433 struct virtchnl_ether_addr list[1];
436 VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_ether_addr_list);
438 /* VIRTCHNL_OP_ADD_VLAN
439 * VF sends this message to add one or more VLAN tag filters for receives.
440 * PF adds the filters and returns status.
441 * If a port VLAN is configured by the PF, this operation will return an
445 /* VIRTCHNL_OP_DEL_VLAN
446 * VF sends this message to remove one or more VLAN tag filters for receives.
447 * PF removes the filters and returns status.
448 * If a port VLAN is configured by the PF, this operation will return an
452 struct virtchnl_vlan_filter_list {
458 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_vlan_filter_list);
460 /* VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
461 * VF sends VSI id and flags.
462 * PF returns status code in retval.
463 * Note: we assume that broadcast accept mode is always enabled.
465 struct virtchnl_promisc_info {
470 VIRTCHNL_CHECK_STRUCT_LEN(4, virtchnl_promisc_info);
472 #define FLAG_VF_UNICAST_PROMISC 0x00000001
473 #define FLAG_VF_MULTICAST_PROMISC 0x00000002
475 /* VIRTCHNL_OP_GET_STATS
476 * VF sends this message to request stats for the selected VSI. VF uses
477 * the virtchnl_queue_select struct to specify the VSI. The queue_id
478 * field is ignored by the PF.
480 * PF replies with struct virtchnl_eth_stats in an external buffer.
483 struct virtchnl_eth_stats {
484 u64 rx_bytes; /* received bytes */
485 u64 rx_unicast; /* received unicast pkts */
486 u64 rx_multicast; /* received multicast pkts */
487 u64 rx_broadcast; /* received broadcast pkts */
489 u64 rx_unknown_protocol;
490 u64 tx_bytes; /* transmitted bytes */
491 u64 tx_unicast; /* transmitted unicast pkts */
492 u64 tx_multicast; /* transmitted multicast pkts */
493 u64 tx_broadcast; /* transmitted broadcast pkts */
498 /* VIRTCHNL_OP_CONFIG_RSS_KEY
499 * VIRTCHNL_OP_CONFIG_RSS_LUT
500 * VF sends these messages to configure RSS. Only supported if both PF
501 * and VF drivers set the VIRTCHNL_VF_OFFLOAD_RSS_PF bit during
502 * configuration negotiation. If this is the case, then the RSS fields in
503 * the VF resource struct are valid.
504 * Both the key and LUT are initialized to 0 by the PF, meaning that
505 * RSS is effectively disabled until set up by the VF.
507 struct virtchnl_rss_key {
510 u8 key[1]; /* RSS hash key, packed bytes */
513 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_key);
515 struct virtchnl_rss_lut {
518 u8 lut[1]; /* RSS lookup table */
521 VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_lut);
523 /* VIRTCHNL_OP_GET_RSS_HENA_CAPS
524 * VIRTCHNL_OP_SET_RSS_HENA
525 * VF sends these messages to get and set the hash filter enable bits for RSS.
526 * By default, the PF sets these to all possible traffic types that the
527 * hardware supports. The VF can query this value if it wants to change the
528 * traffic types that are hashed by the hardware.
530 struct virtchnl_rss_hena {
534 VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_rss_hena);
536 /* This is used by PF driver to enforce how many channels can be supported.
537 * When ADQ_V2 capability is negotiated, it will allow 16 channels otherwise
538 * PF driver will allow only max 4 channels
540 #define VIRTCHNL_MAX_ADQ_CHANNELS 4
541 #define VIRTCHNL_MAX_ADQ_V2_CHANNELS 16
543 /* VIRTCHNL_OP_ENABLE_CHANNELS
544 * VIRTCHNL_OP_DISABLE_CHANNELS
545 * VF sends these messages to enable or disable channels based on
546 * the user specified queue count and queue offset for each traffic class.
547 * This struct encompasses all the information that the PF needs from
548 * VF to create a channel.
550 struct virtchnl_channel_info {
551 u16 count; /* number of queues in a channel */
552 u16 offset; /* queues in a channel start from 'offset' */
557 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_channel_info);
559 struct virtchnl_tc_info {
562 struct virtchnl_channel_info list[1];
565 VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_tc_info);
567 /* VIRTCHNL_ADD_CLOUD_FILTER
568 * VIRTCHNL_DEL_CLOUD_FILTER
569 * VF sends these messages to add or delete a cloud filter based on the
570 * user specified match and action filters. These structures encompass
571 * all the information that the PF needs from the VF to add/delete a
575 struct virtchnl_l4_spec {
576 u8 src_mac[ETH_ALEN];
577 u8 dst_mac[ETH_ALEN];
578 /* vlan_prio is part of this 16 bit field even from OS perspective
579 * vlan_id:12 is actual vlan_id, then vlanid:bit14..12 is vlan_prio
580 * in future, when decided to offload vlan_prio, pass that information
581 * as part of the "vlan_id" field, Bit14..12
584 __be16 pad; /* reserved for future use */
591 VIRTCHNL_CHECK_STRUCT_LEN(52, virtchnl_l4_spec);
593 union virtchnl_flow_spec {
594 struct virtchnl_l4_spec tcp_spec;
595 u8 buffer[128]; /* reserved for future use */
598 VIRTCHNL_CHECK_UNION_LEN(128, virtchnl_flow_spec);
600 enum virtchnl_action {
602 VIRTCHNL_ACTION_DROP = 0,
603 VIRTCHNL_ACTION_TC_REDIRECT,
606 enum virtchnl_flow_type {
608 VIRTCHNL_TCP_V4_FLOW = 0,
609 VIRTCHNL_TCP_V6_FLOW,
610 VIRTCHNL_UDP_V4_FLOW,
611 VIRTCHNL_UDP_V6_FLOW,
614 struct virtchnl_filter {
615 union virtchnl_flow_spec data;
616 union virtchnl_flow_spec mask;
617 enum virtchnl_flow_type flow_type;
618 enum virtchnl_action action;
623 VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);
626 * PF sends this message to inform the VF driver of events that may affect it.
627 * No direct response is expected from the VF, though it may generate other
628 * messages in response to this one.
630 enum virtchnl_event_codes {
631 VIRTCHNL_EVENT_UNKNOWN = 0,
632 VIRTCHNL_EVENT_LINK_CHANGE,
633 VIRTCHNL_EVENT_RESET_IMPENDING,
634 VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
637 #define PF_EVENT_SEVERITY_INFO 0
638 #define PF_EVENT_SEVERITY_ATTENTION 1
639 #define PF_EVENT_SEVERITY_ACTION_REQUIRED 2
640 #define PF_EVENT_SEVERITY_CERTAIN_DOOM 255
642 struct virtchnl_pf_event {
643 enum virtchnl_event_codes event;
645 /* If the PF driver does not support the new speed reporting
646 * capabilities then use link_event else use link_event_adv to
647 * get the speed and link information. The ability to understand
648 * new speeds is indicated by setting the capability flag
649 * VIRTCHNL_VF_CAP_ADV_LINK_SPEED in vf_cap_flags parameter
650 * in virtchnl_vf_resource struct and can be used to determine
651 * which link event struct to use below.
654 enum virtchnl_link_speed link_speed;
658 /* link_speed provided in Mbps */
667 VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);
670 /* Since VF messages are limited by u16 size, precalculate the maximum possible
671 * values of nested elements in virtchnl structures that virtual channel can
672 * possibly handle in a single message.
674 enum virtchnl_vector_limits {
675 VIRTCHNL_OP_CONFIG_VSI_QUEUES_MAX =
676 ((u16)(~0) - sizeof(struct virtchnl_vsi_queue_config_info)) /
677 sizeof(struct virtchnl_queue_pair_info),
679 VIRTCHNL_OP_CONFIG_IRQ_MAP_MAX =
680 ((u16)(~0) - sizeof(struct virtchnl_irq_map_info)) /
681 sizeof(struct virtchnl_vector_map),
683 VIRTCHNL_OP_ADD_DEL_ETH_ADDR_MAX =
684 ((u16)(~0) - sizeof(struct virtchnl_ether_addr_list)) /
685 sizeof(struct virtchnl_ether_addr),
687 VIRTCHNL_OP_ADD_DEL_VLAN_MAX =
688 ((u16)(~0) - sizeof(struct virtchnl_vlan_filter_list)) /
692 VIRTCHNL_OP_ENABLE_CHANNELS_MAX =
693 ((u16)(~0) - sizeof(struct virtchnl_tc_info)) /
694 sizeof(struct virtchnl_channel_info),
697 /* VF reset states - these are written into the RSTAT register:
698 * VFGEN_RSTAT on the VF
699 * When the PF initiates a reset, it writes 0
700 * When the reset is complete, it writes 1
701 * When the PF detects that the VF has recovered, it writes 2
702 * VF checks this register periodically to determine if a reset has occurred,
703 * then polls it to know when the reset is complete.
704 * If either the PF or VF reads the register while the hardware
705 * is in a reset state, it will return DEADBEEF, which, when masked
708 enum virtchnl_vfr_states {
709 VIRTCHNL_VFR_INPROGRESS = 0,
710 VIRTCHNL_VFR_COMPLETED,
711 VIRTCHNL_VFR_VFACTIVE,
715 * virtchnl_vc_validate_vf_msg
716 * @ver: Virtchnl version info
717 * @v_opcode: Opcode for the message
718 * @msg: pointer to the msg buffer
719 * @msglen: msg length
721 * validate msg format against struct for each opcode
724 virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
727 bool err_msg_format = false;
730 /* Validate message length. */
732 case VIRTCHNL_OP_VERSION:
733 valid_len = sizeof(struct virtchnl_version_info);
735 case VIRTCHNL_OP_RESET_VF:
737 case VIRTCHNL_OP_GET_VF_RESOURCES:
739 valid_len = sizeof(u32);
741 case VIRTCHNL_OP_CONFIG_TX_QUEUE:
742 valid_len = sizeof(struct virtchnl_txq_info);
744 case VIRTCHNL_OP_CONFIG_RX_QUEUE:
745 valid_len = sizeof(struct virtchnl_rxq_info);
747 case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
748 valid_len = sizeof(struct virtchnl_vsi_queue_config_info);
749 if (msglen >= valid_len) {
750 struct virtchnl_vsi_queue_config_info *vqc =
751 (struct virtchnl_vsi_queue_config_info *)msg;
753 if (vqc->num_queue_pairs == 0 || vqc->num_queue_pairs >
754 VIRTCHNL_OP_CONFIG_VSI_QUEUES_MAX) {
755 err_msg_format = true;
759 valid_len += (vqc->num_queue_pairs *
761 virtchnl_queue_pair_info));
764 case VIRTCHNL_OP_CONFIG_IRQ_MAP:
765 valid_len = sizeof(struct virtchnl_irq_map_info);
766 if (msglen >= valid_len) {
767 struct virtchnl_irq_map_info *vimi =
768 (struct virtchnl_irq_map_info *)msg;
770 if (vimi->num_vectors == 0 || vimi->num_vectors >
771 VIRTCHNL_OP_CONFIG_IRQ_MAP_MAX) {
772 err_msg_format = true;
776 valid_len += (vimi->num_vectors *
777 sizeof(struct virtchnl_vector_map));
780 case VIRTCHNL_OP_ENABLE_QUEUES:
781 case VIRTCHNL_OP_DISABLE_QUEUES:
782 valid_len = sizeof(struct virtchnl_queue_select);
784 case VIRTCHNL_OP_ADD_ETH_ADDR:
785 case VIRTCHNL_OP_DEL_ETH_ADDR:
786 valid_len = sizeof(struct virtchnl_ether_addr_list);
787 if (msglen >= valid_len) {
788 struct virtchnl_ether_addr_list *veal =
789 (struct virtchnl_ether_addr_list *)msg;
791 if (veal->num_elements == 0 || veal->num_elements >
792 VIRTCHNL_OP_ADD_DEL_ETH_ADDR_MAX) {
793 err_msg_format = true;
797 valid_len += veal->num_elements *
798 sizeof(struct virtchnl_ether_addr);
801 case VIRTCHNL_OP_ADD_VLAN:
802 case VIRTCHNL_OP_DEL_VLAN:
803 valid_len = sizeof(struct virtchnl_vlan_filter_list);
804 if (msglen >= valid_len) {
805 struct virtchnl_vlan_filter_list *vfl =
806 (struct virtchnl_vlan_filter_list *)msg;
808 if (vfl->num_elements == 0 || vfl->num_elements >
809 VIRTCHNL_OP_ADD_DEL_VLAN_MAX) {
810 err_msg_format = true;
814 valid_len += vfl->num_elements * sizeof(u16);
817 case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
818 valid_len = sizeof(struct virtchnl_promisc_info);
820 case VIRTCHNL_OP_GET_STATS:
821 valid_len = sizeof(struct virtchnl_queue_select);
823 case VIRTCHNL_OP_CONFIG_RSS_KEY:
824 valid_len = sizeof(struct virtchnl_rss_key);
825 if (msglen >= valid_len) {
826 struct virtchnl_rss_key *vrk =
827 (struct virtchnl_rss_key *)msg;
829 if (vrk->key_len == 0) {
830 /* zero length is allowed as input */
834 valid_len += vrk->key_len - 1;
837 case VIRTCHNL_OP_CONFIG_RSS_LUT:
838 valid_len = sizeof(struct virtchnl_rss_lut);
839 if (msglen >= valid_len) {
840 struct virtchnl_rss_lut *vrl =
841 (struct virtchnl_rss_lut *)msg;
843 if (vrl->lut_entries == 0) {
844 /* zero entries is allowed as input */
848 valid_len += vrl->lut_entries - 1;
851 case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
853 case VIRTCHNL_OP_SET_RSS_HENA:
854 valid_len = sizeof(struct virtchnl_rss_hena);
856 case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
857 case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
859 case VIRTCHNL_OP_REQUEST_QUEUES:
860 valid_len = sizeof(struct virtchnl_vf_res_request);
862 case VIRTCHNL_OP_ENABLE_CHANNELS:
863 valid_len = sizeof(struct virtchnl_tc_info);
864 if (msglen >= valid_len) {
865 struct virtchnl_tc_info *vti =
866 (struct virtchnl_tc_info *)msg;
868 if (vti->num_tc == 0 || vti->num_tc >
869 VIRTCHNL_OP_ENABLE_CHANNELS_MAX) {
870 err_msg_format = true;
874 valid_len += (vti->num_tc - 1) *
875 sizeof(struct virtchnl_channel_info);
878 case VIRTCHNL_OP_DISABLE_CHANNELS:
880 case VIRTCHNL_OP_ADD_CLOUD_FILTER:
881 case VIRTCHNL_OP_DEL_CLOUD_FILTER:
882 valid_len = sizeof(struct virtchnl_filter);
884 case VIRTCHNL_OP_DCF_CMD_DESC:
885 case VIRTCHNL_OP_DCF_CMD_BUFF:
886 /* These two opcodes are specific to handle the AdminQ command,
887 * so the validation needs to be done in PF's context.
890 /* These are always errors coming from the VF. */
891 case VIRTCHNL_OP_EVENT:
892 case VIRTCHNL_OP_UNKNOWN:
894 return VIRTCHNL_STATUS_ERR_PARAM;
896 /* few more checks */
897 if (err_msg_format || valid_len != msglen)
898 return VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH;
902 #endif /* _VIRTCHNL_H_ */