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34 #ifndef _I40E_VIRTCHNL_H_
35 #define _I40E_VIRTCHNL_H_
37 #include "i40e_type.h"
40 * This header file describes the VF-PF communication protocol used
41 * by the various i40e drivers.
43 * Admin queue buffer usage:
44 * desc->opcode is always i40e_aqc_opc_send_msg_to_pf
45 * flags, retval, datalen, and data addr are all used normally.
46 * Firmware copies the cookie fields when sending messages between the PF and
47 * VF, but uses all other fields internally. Due to this limitation, we
48 * must send all messages as "indirect", i.e. using an external buffer.
50 * All the vsi indexes are relative to the VF. Each VF can have maximum of
51 * three VSIs. All the queue indexes are relative to the VSI. Each VF can
52 * have a maximum of sixteen queues for all of its VSIs.
54 * The PF is required to return a status code in v_retval for all messages
55 * except RESET_VF, which does not require any response. The return value is of
56 * i40e_status_code type, defined in the i40e_type.h.
58 * In general, VF driver initialization should roughly follow the order of these
59 * opcodes. The VF driver must first validate the API version of the PF driver,
60 * then request a reset, then get resources, then configure queues and
61 * interrupts. After these operations are complete, the VF driver may start
62 * its queues, optionally add MAC and VLAN filters, and process traffic.
65 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
66 * of the virtchnl_msg structure.
68 enum i40e_virtchnl_ops {
69 /* VF sends req. to pf for the following
72 I40E_VIRTCHNL_OP_UNKNOWN = 0,
73 I40E_VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
74 I40E_VIRTCHNL_OP_RESET_VF,
75 I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
76 I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE,
77 I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE,
78 I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
79 I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
80 I40E_VIRTCHNL_OP_ENABLE_QUEUES,
81 I40E_VIRTCHNL_OP_DISABLE_QUEUES,
82 I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
83 I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
84 I40E_VIRTCHNL_OP_ADD_VLAN,
85 I40E_VIRTCHNL_OP_DEL_VLAN,
86 I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
87 I40E_VIRTCHNL_OP_GET_STATS,
88 I40E_VIRTCHNL_OP_FCOE,
89 /* PF sends status change events to vfs using
92 I40E_VIRTCHNL_OP_EVENT,
95 /* Virtual channel message descriptor. This overlays the admin queue
96 * descriptor. All other data is passed in external buffers.
99 struct i40e_virtchnl_msg {
100 u8 pad[8]; /* AQ flags/opcode/len/retval fields */
101 enum i40e_virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
102 enum i40e_status_code v_retval; /* ditto for desc->retval */
103 u32 vfid; /* used by PF when sending to VF */
106 /* Message descriptions and data structures.*/
108 /* I40E_VIRTCHNL_OP_VERSION
109 * VF posts its version number to the PF. PF responds with its version number
110 * in the same format, along with a return code.
111 * Reply from PF has its major/minor versions also in param0 and param1.
112 * If there is a major version mismatch, then the VF cannot operate.
113 * If there is a minor version mismatch, then the VF can operate but should
114 * add a warning to the system log.
116 * This enum element MUST always be specified as == 1, regardless of other
117 * changes in the API. The PF must always respond to this message without
118 * error regardless of version mismatch.
120 #define I40E_VIRTCHNL_VERSION_MAJOR 1
121 #define I40E_VIRTCHNL_VERSION_MINOR 0
122 struct i40e_virtchnl_version_info {
127 /* I40E_VIRTCHNL_OP_RESET_VF
128 * VF sends this request to PF with no parameters
129 * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
130 * until reset completion is indicated. The admin queue must be reinitialized
131 * after this operation.
133 * When reset is complete, PF must ensure that all queues in all VSIs associated
134 * with the VF are stopped, all queue configurations in the HMC are set to 0,
135 * and all MAC and VLAN filters (except the default MAC address) on all VSIs
139 /* I40E_VIRTCHNL_OP_GET_VF_RESOURCES
140 * VF sends this request to PF with no parameters
141 * PF responds with an indirect message containing
142 * i40e_virtchnl_vf_resource and one or more
143 * i40e_virtchnl_vsi_resource structures.
146 struct i40e_virtchnl_vsi_resource {
149 enum i40e_vsi_type vsi_type;
151 u8 default_mac_addr[I40E_ETH_LENGTH_OF_ADDRESS];
153 /* VF offload flags */
154 #define I40E_VIRTCHNL_VF_OFFLOAD_L2 0x00000001
155 #define I40E_VIRTCHNL_VF_OFFLOAD_IWARP 0x00000002
156 #define I40E_VIRTCHNL_VF_OFFLOAD_FCOE 0x00000004
157 #define I40E_VIRTCHNL_VF_OFFLOAD_VLAN 0x00010000
159 struct i40e_virtchnl_vf_resource {
165 u32 vf_offload_flags;
166 u32 max_fcoe_contexts;
167 u32 max_fcoe_filters;
169 struct i40e_virtchnl_vsi_resource vsi_res[1];
172 /* I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE
173 * VF sends this message to set up parameters for one TX queue.
174 * External data buffer contains one instance of i40e_virtchnl_txq_info.
175 * PF configures requested queue and returns a status code.
178 /* Tx queue config info */
179 struct i40e_virtchnl_txq_info {
182 u16 ring_len; /* number of descriptors, multiple of 8 */
188 /* I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE
189 * VF sends this message to set up parameters for one RX queue.
190 * External data buffer contains one instance of i40e_virtchnl_rxq_info.
191 * PF configures requested queue and returns a status code.
194 /* Rx queue config info */
195 struct i40e_virtchnl_rxq_info {
198 u32 ring_len; /* number of descriptors, multiple of 32 */
200 u16 splithdr_enabled;
204 enum i40e_hmc_obj_rx_hsplit_0 rx_split_pos;
207 /* I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES
208 * VF sends this message to set parameters for all active TX and RX queues
209 * associated with the specified VSI.
210 * PF configures queues and returns status.
211 * If the number of queues specified is greater than the number of queues
212 * associated with the VSI, an error is returned and no queues are configured.
214 struct i40e_virtchnl_queue_pair_info {
215 /* NOTE: vsi_id and queue_id should be identical for both queues. */
216 struct i40e_virtchnl_txq_info txq;
217 struct i40e_virtchnl_rxq_info rxq;
220 struct i40e_virtchnl_vsi_queue_config_info {
223 struct i40e_virtchnl_queue_pair_info qpair[1];
226 /* I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP
227 * VF uses this message to map vectors to queues.
228 * The rxq_map and txq_map fields are bitmaps used to indicate which queues
229 * are to be associated with the specified vector.
230 * The "other" causes are always mapped to vector 0.
231 * PF configures interrupt mapping and returns status.
233 struct i40e_virtchnl_vector_map {
242 struct i40e_virtchnl_irq_map_info {
244 struct i40e_virtchnl_vector_map vecmap[1];
247 /* I40E_VIRTCHNL_OP_ENABLE_QUEUES
248 * I40E_VIRTCHNL_OP_DISABLE_QUEUES
249 * VF sends these message to enable or disable TX/RX queue pairs.
250 * The queues fields are bitmaps indicating which queues to act upon.
251 * (Currently, we only support 16 queues per VF, but we make the field
252 * u32 to allow for expansion.)
253 * PF performs requested action and returns status.
255 struct i40e_virtchnl_queue_select {
262 /* I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS
263 * VF sends this message in order to add one or more unicast or multicast
264 * address filters for the specified VSI.
265 * PF adds the filters and returns status.
268 /* I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS
269 * VF sends this message in order to remove one or more unicast or multicast
270 * filters for the specified VSI.
271 * PF removes the filters and returns status.
274 struct i40e_virtchnl_ether_addr {
275 u8 addr[I40E_ETH_LENGTH_OF_ADDRESS];
279 struct i40e_virtchnl_ether_addr_list {
282 struct i40e_virtchnl_ether_addr list[1];
285 /* I40E_VIRTCHNL_OP_ADD_VLAN
286 * VF sends this message to add one or more VLAN tag filters for receives.
287 * PF adds the filters and returns status.
288 * If a port VLAN is configured by the PF, this operation will return an
292 /* I40E_VIRTCHNL_OP_DEL_VLAN
293 * VF sends this message to remove one or more VLAN tag filters for receives.
294 * PF removes the filters and returns status.
295 * If a port VLAN is configured by the PF, this operation will return an
299 struct i40e_virtchnl_vlan_filter_list {
305 /* I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
306 * VF sends VSI id and flags.
307 * PF returns status code in retval.
308 * Note: we assume that broadcast accept mode is always enabled.
310 struct i40e_virtchnl_promisc_info {
315 #define I40E_FLAG_VF_UNICAST_PROMISC 0x00000001
316 #define I40E_FLAG_VF_MULTICAST_PROMISC 0x00000002
318 /* I40E_VIRTCHNL_OP_GET_STATS
319 * VF sends this message to request stats for the selected VSI. VF uses
320 * the i40e_virtchnl_queue_select struct to specify the VSI. The queue_id
321 * field is ignored by the PF.
323 * PF replies with struct i40e_eth_stats in an external buffer.
326 /* I40E_VIRTCHNL_OP_EVENT
327 * PF sends this message to inform the VF driver of events that may affect it.
328 * No direct response is expected from the VF, though it may generate other
329 * messages in response to this one.
331 enum i40e_virtchnl_event_codes {
332 I40E_VIRTCHNL_EVENT_UNKNOWN = 0,
333 I40E_VIRTCHNL_EVENT_LINK_CHANGE,
334 I40E_VIRTCHNL_EVENT_RESET_IMPENDING,
335 I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
337 #define I40E_PF_EVENT_SEVERITY_INFO 0
338 #define I40E_PF_EVENT_SEVERITY_ATTENTION 1
339 #define I40E_PF_EVENT_SEVERITY_ACTION_REQUIRED 2
340 #define I40E_PF_EVENT_SEVERITY_CERTAIN_DOOM 255
342 struct i40e_virtchnl_pf_event {
343 enum i40e_virtchnl_event_codes event;
346 enum i40e_aq_link_speed link_speed;
354 /* VF reset states - these are written into the RSTAT register:
355 * I40E_VFGEN_RSTAT1 on the PF
356 * I40E_VFGEN_RSTAT on the VF
357 * When the PF initiates a reset, it writes 0
358 * When the reset is complete, it writes 1
359 * When the PF detects that the VF has recovered, it writes 2
360 * VF checks this register periodically to determine if a reset has occurred,
361 * then polls it to know when the reset is complete.
362 * If either the PF or VF reads the register while the hardware
363 * is in a reset state, it will return DEADBEEF, which, when masked
366 enum i40e_vfr_states {
367 I40E_VFR_INPROGRESS = 0,
373 #endif /* _I40E_VIRTCHNL_H_ */