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35 #ifndef _I40E_VIRTCHNL_H_
36 #define _I40E_VIRTCHNL_H_
38 #include "i40e_type.h"
41 * This header file describes the VF-PF communication protocol used
42 * by the various i40e drivers.
44 * Admin queue buffer usage:
45 * desc->opcode is always i40e_aqc_opc_send_msg_to_pf
46 * flags, retval, datalen, and data addr are all used normally.
47 * Firmware copies the cookie fields when sending messages between the PF and
48 * VF, but uses all other fields internally. Due to this limitation, we
49 * must send all messages as "indirect", i.e. using an external buffer.
51 * All the vsi indexes are relative to the VF. Each VF can have maximum of
52 * three VSIs. All the queue indexes are relative to the VSI. Each VF can
53 * have a maximum of sixteen queues for all of its VSIs.
55 * The PF is required to return a status code in v_retval for all messages
56 * except RESET_VF, which does not require any response. The return value is of
57 * i40e_status_code type, defined in the i40e_type.h.
59 * In general, VF driver initialization should roughly follow the order of these
60 * opcodes. The VF driver must first validate the API version of the PF driver,
61 * then request a reset, then get resources, then configure queues and
62 * interrupts. After these operations are complete, the VF driver may start
63 * its queues, optionally add MAC and VLAN filters, and process traffic.
66 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
67 * of the virtchnl_msg structure.
69 enum i40e_virtchnl_ops {
70 /* The PF sends status change events to VFs using
71 * the I40E_VIRTCHNL_OP_EVENT opcode.
72 * VFs send requests to the PF using the other ops.
74 I40E_VIRTCHNL_OP_UNKNOWN = 0,
75 I40E_VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
76 I40E_VIRTCHNL_OP_RESET_VF = 2,
77 I40E_VIRTCHNL_OP_GET_VF_RESOURCES = 3,
78 I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE = 4,
79 I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE = 5,
80 I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES = 6,
81 I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP = 7,
82 I40E_VIRTCHNL_OP_ENABLE_QUEUES = 8,
83 I40E_VIRTCHNL_OP_DISABLE_QUEUES = 9,
84 I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS = 10,
85 I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS = 11,
86 I40E_VIRTCHNL_OP_ADD_VLAN = 12,
87 I40E_VIRTCHNL_OP_DEL_VLAN = 13,
88 I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
89 I40E_VIRTCHNL_OP_GET_STATS = 15,
90 I40E_VIRTCHNL_OP_FCOE = 16,
91 I40E_VIRTCHNL_OP_EVENT = 17,
94 /* Virtual channel message descriptor. This overlays the admin queue
95 * descriptor. All other data is passed in external buffers.
98 struct i40e_virtchnl_msg {
99 u8 pad[8]; /* AQ flags/opcode/len/retval fields */
100 enum i40e_virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
101 enum i40e_status_code v_retval; /* ditto for desc->retval */
102 u32 vfid; /* used by PF when sending to VF */
105 /* Message descriptions and data structures.*/
107 /* I40E_VIRTCHNL_OP_VERSION
108 * VF posts its version number to the PF. PF responds with its version number
109 * in the same format, along with a return code.
110 * Reply from PF has its major/minor versions also in param0 and param1.
111 * If there is a major version mismatch, then the VF cannot operate.
112 * If there is a minor version mismatch, then the VF can operate but should
113 * add a warning to the system log.
115 * This enum element MUST always be specified as == 1, regardless of other
116 * changes in the API. The PF must always respond to this message without
117 * error regardless of version mismatch.
119 #define I40E_VIRTCHNL_VERSION_MAJOR 1
120 #define I40E_VIRTCHNL_VERSION_MINOR 1
121 #define I40E_VIRTCHNL_VERSION_MINOR_NO_VF_CAPS 0
123 struct i40e_virtchnl_version_info {
128 /* I40E_VIRTCHNL_OP_RESET_VF
129 * VF sends this request to PF with no parameters
130 * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
131 * until reset completion is indicated. The admin queue must be reinitialized
132 * after this operation.
134 * When reset is complete, PF must ensure that all queues in all VSIs associated
135 * with the VF are stopped, all queue configurations in the HMC are set to 0,
136 * and all MAC and VLAN filters (except the default MAC address) on all VSIs
140 /* I40E_VIRTCHNL_OP_GET_VF_RESOURCES
141 * Version 1.0 VF sends this request to PF with no parameters
142 * Version 1.1 VF sends this request to PF with u32 bitmap of its capabilities
143 * PF responds with an indirect message containing
144 * i40e_virtchnl_vf_resource and one or more
145 * i40e_virtchnl_vsi_resource structures.
148 struct i40e_virtchnl_vsi_resource {
151 enum i40e_vsi_type vsi_type;
153 u8 default_mac_addr[I40E_ETH_LENGTH_OF_ADDRESS];
155 /* VF offload flags */
156 #define I40E_VIRTCHNL_VF_OFFLOAD_L2 0x00000001
157 #define I40E_VIRTCHNL_VF_OFFLOAD_IWARP 0x00000002
158 #define I40E_VIRTCHNL_VF_OFFLOAD_FCOE 0x00000004
159 #define I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ 0x00000008
160 #define I40E_VIRTCHNL_VF_OFFLOAD_RSS_REG 0x00000010
161 #define I40E_VIRTCHNL_VF_OFFLOAD_VLAN 0x00010000
162 #define I40E_VIRTCHNL_VF_OFFLOAD_RX_POLLING 0x00020000
164 struct i40e_virtchnl_vf_resource {
170 u32 vf_offload_flags;
171 u32 max_fcoe_contexts;
172 u32 max_fcoe_filters;
174 struct i40e_virtchnl_vsi_resource vsi_res[1];
177 /* I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE
178 * VF sends this message to set up parameters for one TX queue.
179 * External data buffer contains one instance of i40e_virtchnl_txq_info.
180 * PF configures requested queue and returns a status code.
183 /* Tx queue config info */
184 struct i40e_virtchnl_txq_info {
187 u16 ring_len; /* number of descriptors, multiple of 8 */
193 /* I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE
194 * VF sends this message to set up parameters for one RX queue.
195 * External data buffer contains one instance of i40e_virtchnl_rxq_info.
196 * PF configures requested queue and returns a status code.
199 /* Rx queue config info */
200 struct i40e_virtchnl_rxq_info {
203 u32 ring_len; /* number of descriptors, multiple of 32 */
205 u16 splithdr_enabled;
209 enum i40e_hmc_obj_rx_hsplit_0 rx_split_pos;
212 /* I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES
213 * VF sends this message to set parameters for all active TX and RX queues
214 * associated with the specified VSI.
215 * PF configures queues and returns status.
216 * If the number of queues specified is greater than the number of queues
217 * associated with the VSI, an error is returned and no queues are configured.
219 struct i40e_virtchnl_queue_pair_info {
220 /* NOTE: vsi_id and queue_id should be identical for both queues. */
221 struct i40e_virtchnl_txq_info txq;
222 struct i40e_virtchnl_rxq_info rxq;
225 struct i40e_virtchnl_vsi_queue_config_info {
228 struct i40e_virtchnl_queue_pair_info qpair[1];
231 /* I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP
232 * VF uses this message to map vectors to queues.
233 * The rxq_map and txq_map fields are bitmaps used to indicate which queues
234 * are to be associated with the specified vector.
235 * The "other" causes are always mapped to vector 0.
236 * PF configures interrupt mapping and returns status.
238 struct i40e_virtchnl_vector_map {
247 struct i40e_virtchnl_irq_map_info {
249 struct i40e_virtchnl_vector_map vecmap[1];
252 /* I40E_VIRTCHNL_OP_ENABLE_QUEUES
253 * I40E_VIRTCHNL_OP_DISABLE_QUEUES
254 * VF sends these message to enable or disable TX/RX queue pairs.
255 * The queues fields are bitmaps indicating which queues to act upon.
256 * (Currently, we only support 16 queues per VF, but we make the field
257 * u32 to allow for expansion.)
258 * PF performs requested action and returns status.
260 struct i40e_virtchnl_queue_select {
267 /* I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS
268 * VF sends this message in order to add one or more unicast or multicast
269 * address filters for the specified VSI.
270 * PF adds the filters and returns status.
273 /* I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS
274 * VF sends this message in order to remove one or more unicast or multicast
275 * filters for the specified VSI.
276 * PF removes the filters and returns status.
279 struct i40e_virtchnl_ether_addr {
280 u8 addr[I40E_ETH_LENGTH_OF_ADDRESS];
284 struct i40e_virtchnl_ether_addr_list {
287 struct i40e_virtchnl_ether_addr list[1];
290 /* I40E_VIRTCHNL_OP_ADD_VLAN
291 * VF sends this message to add one or more VLAN tag filters for receives.
292 * PF adds the filters and returns status.
293 * If a port VLAN is configured by the PF, this operation will return an
297 /* I40E_VIRTCHNL_OP_DEL_VLAN
298 * VF sends this message to remove one or more VLAN tag filters for receives.
299 * PF removes the filters and returns status.
300 * If a port VLAN is configured by the PF, this operation will return an
304 struct i40e_virtchnl_vlan_filter_list {
310 /* I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
311 * VF sends VSI id and flags.
312 * PF returns status code in retval.
313 * Note: we assume that broadcast accept mode is always enabled.
315 struct i40e_virtchnl_promisc_info {
320 #define I40E_FLAG_VF_UNICAST_PROMISC 0x00000001
321 #define I40E_FLAG_VF_MULTICAST_PROMISC 0x00000002
323 /* I40E_VIRTCHNL_OP_GET_STATS
324 * VF sends this message to request stats for the selected VSI. VF uses
325 * the i40e_virtchnl_queue_select struct to specify the VSI. The queue_id
326 * field is ignored by the PF.
328 * PF replies with struct i40e_eth_stats in an external buffer.
331 /* I40E_VIRTCHNL_OP_EVENT
332 * PF sends this message to inform the VF driver of events that may affect it.
333 * No direct response is expected from the VF, though it may generate other
334 * messages in response to this one.
336 enum i40e_virtchnl_event_codes {
337 I40E_VIRTCHNL_EVENT_UNKNOWN = 0,
338 I40E_VIRTCHNL_EVENT_LINK_CHANGE,
339 I40E_VIRTCHNL_EVENT_RESET_IMPENDING,
340 I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
342 #define I40E_PF_EVENT_SEVERITY_INFO 0
343 #define I40E_PF_EVENT_SEVERITY_ATTENTION 1
344 #define I40E_PF_EVENT_SEVERITY_ACTION_REQUIRED 2
345 #define I40E_PF_EVENT_SEVERITY_CERTAIN_DOOM 255
347 struct i40e_virtchnl_pf_event {
348 enum i40e_virtchnl_event_codes event;
351 enum i40e_aq_link_speed link_speed;
359 /* VF reset states - these are written into the RSTAT register:
360 * I40E_VFGEN_RSTAT1 on the PF
361 * I40E_VFGEN_RSTAT on the VF
362 * When the PF initiates a reset, it writes 0
363 * When the reset is complete, it writes 1
364 * When the PF detects that the VF has recovered, it writes 2
365 * VF checks this register periodically to determine if a reset has occurred,
366 * then polls it to know when the reset is complete.
367 * If either the PF or VF reads the register while the hardware
368 * is in a reset state, it will return DEADBEEF, which, when masked
371 enum i40e_vfr_states {
372 I40E_VFR_INPROGRESS = 0,
378 #endif /* _I40E_VIRTCHNL_H_ */