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48 * Data Path Network Interface API
49 * Contains initialization APIs and runtime control APIs for DPNI
52 /** General DPNI macros */
55 * Maximum number of traffic classes
59 * Maximum number of buffer pools per DPNI
61 #define DPNI_MAX_DPBP 8
63 * Maximum number of storage-profiles per DPNI
68 * All traffic classes considered; see dpni_set_queue()
70 #define DPNI_ALL_TCS (uint8_t)(-1)
72 * All flows within traffic class considered; see dpni_set_queue()
74 #define DPNI_ALL_TC_FLOWS (uint16_t)(-1)
77 * Tx traffic is always released to a buffer pool on transmit, there are no
78 * resources allocated to have the frames confirmed back to the source after
81 #define DPNI_OPT_TX_FRM_RELEASE 0x000001
83 * Disables support for MAC address filtering for addresses other than primary
84 * MAC address. This affects both unicast and multicast. Promiscuous mode can
85 * still be enabled/disabled for both unicast and multicast. If promiscuous mode
86 * is disabled, only traffic matching the primary MAC address will be accepted.
88 #define DPNI_OPT_NO_MAC_FILTER 0x000002
90 * Allocate policers for this DPNI. They can be used to rate-limit traffic per
91 * traffic class (TC) basis.
93 #define DPNI_OPT_HAS_POLICING 0x000004
95 * Congestion can be managed in several ways, allowing the buffer pool to
96 * deplete on ingress, taildrop on each queue or use congestion groups for sets
97 * of queues. If set, it configures a single congestion groups across all TCs.
98 * If reset, a congestion group is allocated for each TC. Only relevant if the
99 * DPNI has multiple traffic classes.
101 #define DPNI_OPT_SHARED_CONGESTION 0x000008
103 * Enables TCAM for Flow Steering and QoS look-ups. If not specified, all
104 * look-ups are exact match. Note that TCAM is not available on LS1088 and its
105 * variants. Setting this bit on these SoCs will trigger an error.
107 #define DPNI_OPT_HAS_KEY_MASKING 0x000010
109 * Disables the flow steering table.
111 #define DPNI_OPT_NO_FS 0x000020
114 * dpni_open() - Open a control session for the specified object
115 * @mc_io: Pointer to MC portal's I/O object
116 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
117 * @dpni_id: DPNI unique ID
118 * @token: Returned token; use in subsequent API calls
120 * This function can be used to open a control session for an
121 * already created object; an object may have been declared in
122 * the DPL or by calling the dpni_create() function.
123 * This function returns a unique authentication token,
124 * associated with the specific object ID and the specific MC
125 * portal; this token must be used in all subsequent commands for
126 * this specific object.
128 * Return: '0' on Success; Error code otherwise.
130 int dpni_open(struct fsl_mc_io *mc_io,
136 * dpni_close() - Close the control session of the object
137 * @mc_io: Pointer to MC portal's I/O object
138 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
139 * @token: Token of DPNI object
141 * After this function is called, no further operations are
142 * allowed on the object without opening a new control session.
144 * Return: '0' on Success; Error code otherwise.
146 int dpni_close(struct fsl_mc_io *mc_io,
151 * struct dpni_cfg - Structure representing DPNI configuration
152 * @mac_addr: Primary MAC address
153 * @adv: Advanced parameters; default is all zeros;
154 * use this structure to change default settings
158 * @options: Any combination of the following options:
159 * DPNI_OPT_TX_FRM_RELEASE
160 * DPNI_OPT_NO_MAC_FILTER
161 * DPNI_OPT_HAS_POLICING
162 * DPNI_OPT_SHARED_CONGESTION
163 * DPNI_OPT_HAS_KEY_MASKING
165 * @fs_entries: Number of entries in the flow steering table.
166 * This table is used to select the ingress queue for
167 * ingress traffic, targeting a GPP core or another.
168 * In addition it can be used to discard traffic that
169 * matches the set rule. It is either an exact match table
170 * or a TCAM table, depending on DPNI_OPT_ HAS_KEY_MASKING
171 * bit in OPTIONS field. This field is ignored if
172 * DPNI_OPT_NO_FS bit is set in OPTIONS field. Otherwise,
173 * value 0 defaults to 64. Maximum supported value is 1024.
174 * Note that the total number of entries is limited on the
175 * SoC to as low as 512 entries if TCAM is used.
176 * @vlan_filter_entries: Number of entries in the VLAN address filtering
177 * table. This is an exact match table used to filter
178 * ingress traffic based on VLAN IDs. Value 0 disables VLAN
179 * filtering. Maximum supported value is 16.
180 * @mac_filter_entries: Number of entries in the MAC address filtering
181 * table. This is an exact match table and allows both
182 * unicast and multicast entries. The primary MAC address
183 * of the network interface is not part of this table,
184 * this contains only entries in addition to it. This
185 * field is ignored if DPNI_OPT_ NO_MAC_FILTER is set in
186 * OPTIONS field. Otherwise, value 0 defaults to 80.
187 * Maximum supported value is 80.
188 * @num_queues: Number of Tx and Rx queues used for traffic
189 * distribution. This is orthogonal to QoS and is only
190 * used to distribute traffic to multiple GPP cores.
191 * This configuration affects the number of Tx queues
192 * (logical FQs, all associated with a single CEETM queue),
193 * Rx queues and Tx confirmation queues, if applicable.
194 * Value 0 defaults to one queue. Maximum supported value
196 * @num_tcs: Number of traffic classes (TCs), reserved for the DPNI.
197 * TCs can have different priority levels for the purpose
198 * of Tx scheduling (see DPNI_SET_TX_SELECTION), different
199 * BPs (DPNI_ SET_POOLS), policers. There are dedicated QM
200 * queues for traffic classes (including class queues on
201 * Tx). Value 0 defaults to one TC. Maximum supported value
203 * @qos_entries: Number of entries in the QoS classification table. This
204 * table is used to select the TC for ingress traffic. It
205 * is either an exact match or a TCAM table, depending on
206 * DPNI_OPT_ HAS_KEY_MASKING bit in OPTIONS field. This
207 * field is ignored if the DPNI has a single TC. Otherwise,
208 * a value of 0 defaults to 64. Maximum supported value
213 uint8_t vlan_filter_entries;
214 uint8_t mac_filter_entries;
221 * dpni_create() - Create the DPNI object
222 * @mc_io: Pointer to MC portal's I/O object
223 * @dprc_token: Parent container token; '0' for default container
224 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
225 * @cfg: Configuration structure
226 * @obj_id: returned object id
228 * Create the DPNI object, allocate required resources and
229 * perform required initialization.
231 * The object can be created either by declaring it in the
232 * DPL file, or by calling this function.
234 * The function accepts an authentication token of a parent
235 * container that this object should be assigned to. The token
236 * can be '0' so the object will be assigned to the default container.
237 * The newly created object can be opened with the returned
238 * object id and using the container's associated tokens and MC portals.
240 * Return: '0' on Success; Error code otherwise.
242 int dpni_create(struct fsl_mc_io *mc_io,
245 const struct dpni_cfg *cfg,
249 * dpni_destroy() - Destroy the DPNI object and release all its resources.
250 * @mc_io: Pointer to MC portal's I/O object
251 * @dprc_token: Parent container token; '0' for default container
252 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
253 * @object_id: The object id; it must be a valid id within the container that
254 * created this object;
256 * The function accepts the authentication token of the parent container that
257 * created the object (not the one that currently owns the object). The object
258 * is searched within parent using the provided 'object_id'.
259 * All tokens to the object must be closed before calling destroy.
261 * Return: '0' on Success; error code otherwise.
263 int dpni_destroy(struct fsl_mc_io *mc_io,
269 * struct dpni_pools_cfg - Structure representing buffer pools configuration
270 * @num_dpbp: Number of DPBPs
271 * @pools: Array of buffer pools parameters; The number of valid entries
272 * must match 'num_dpbp' value
274 struct dpni_pools_cfg {
277 * struct pools - Buffer pools parameters
278 * @dpbp_id: DPBP object ID
279 * @buffer_size: Buffer size
280 * @backup_pool: Backup pool
284 uint16_t buffer_size;
286 } pools[DPNI_MAX_DPBP];
290 * dpni_set_pools() - Set buffer pools configuration
291 * @mc_io: Pointer to MC portal's I/O object
292 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
293 * @token: Token of DPNI object
294 * @cfg: Buffer pools configuration
296 * mandatory for DPNI operation
297 * warning:Allowed only when DPNI is disabled
299 * Return: '0' on Success; Error code otherwise.
301 int dpni_set_pools(struct fsl_mc_io *mc_io,
304 const struct dpni_pools_cfg *cfg);
307 * dpni_enable() - Enable the DPNI, allow sending and receiving frames.
308 * @mc_io: Pointer to MC portal's I/O object
309 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
310 * @token: Token of DPNI object
312 * Return: '0' on Success; Error code otherwise.
314 int dpni_enable(struct fsl_mc_io *mc_io,
319 * dpni_disable() - Disable the DPNI, stop sending and receiving frames.
320 * @mc_io: Pointer to MC portal's I/O object
321 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
322 * @token: Token of DPNI object
324 * Return: '0' on Success; Error code otherwise.
326 int dpni_disable(struct fsl_mc_io *mc_io,
331 * dpni_is_enabled() - Check if the DPNI is enabled.
332 * @mc_io: Pointer to MC portal's I/O object
333 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
334 * @token: Token of DPNI object
335 * @en: Returns '1' if object is enabled; '0' otherwise
337 * Return: '0' on Success; Error code otherwise.
339 int dpni_is_enabled(struct fsl_mc_io *mc_io,
345 * dpni_reset() - Reset the DPNI, returns the object to initial state.
346 * @mc_io: Pointer to MC portal's I/O object
347 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
348 * @token: Token of DPNI object
350 * Return: '0' on Success; Error code otherwise.
352 int dpni_reset(struct fsl_mc_io *mc_io,
357 * struct dpni_attr - Structure representing DPNI attributes
358 * @options: Any combination of the following options:
359 * DPNI_OPT_TX_FRM_RELEASE
360 * DPNI_OPT_NO_MAC_FILTER
361 * DPNI_OPT_HAS_POLICING
362 * DPNI_OPT_SHARED_CONGESTION
363 * DPNI_OPT_HAS_KEY_MASKING
365 * @num_queues: Number of Tx and Rx queues used for traffic distribution.
366 * @num_tcs: Number of traffic classes (TCs), reserved for the DPNI.
367 * @mac_filter_entries: Number of entries in the MAC address filtering
369 * @vlan_filter_entries: Number of entries in the VLAN address filtering
371 * @qos_entries: Number of entries in the QoS classification table.
372 * @fs_entries: Number of entries in the flow steering table.
373 * @qos_key_size: Size, in bytes, of the QoS look-up key. Defining a key larger
374 * than this when adding QoS entries will result
376 * @fs_key_size: Size, in bytes, of the flow steering look-up key. Defining a
377 * key larger than this when composing the hash + FS key
378 * will result in an error.
379 * @wriop_version: Version of WRIOP HW block.
380 * The 3 version values are stored on 6, 5, 5 bits
383 * - 0x400 - WRIOP version 1.0.0, used on LS2080 and
385 * - 0x421 - WRIOP version 1.1.1, used on LS2088 and
387 * - 0x422 - WRIOP version 1.1.2, used on LS1088 and
394 uint8_t mac_filter_entries;
395 uint8_t vlan_filter_entries;
398 uint8_t qos_key_size;
400 uint16_t wriop_version;
404 * dpni_get_attributes() - Retrieve DPNI attributes.
405 * @mc_io: Pointer to MC portal's I/O object
406 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
407 * @token: Token of DPNI object
408 * @attr: Object's attributes
410 * Return: '0' on Success; Error code otherwise.
412 int dpni_get_attributes(struct fsl_mc_io *mc_io,
415 struct dpni_attr *attr);
422 * Extract out of frame header error
424 #define DPNI_ERROR_EOFHE 0x00020000
428 #define DPNI_ERROR_FLE 0x00002000
430 * Frame physical error
432 #define DPNI_ERROR_FPE 0x00001000
434 * Parsing header error
436 #define DPNI_ERROR_PHE 0x00000020
438 * Parser L3 checksum error
440 #define DPNI_ERROR_L3CE 0x00000004
442 * Parser L3 checksum error
444 #define DPNI_ERROR_L4CE 0x00000001
447 * enum dpni_error_action - Defines DPNI behavior for errors
448 * @DPNI_ERROR_ACTION_DISCARD: Discard the frame
449 * @DPNI_ERROR_ACTION_CONTINUE: Continue with the normal flow
450 * @DPNI_ERROR_ACTION_SEND_TO_ERROR_QUEUE: Send the frame to the error queue
452 enum dpni_error_action {
453 DPNI_ERROR_ACTION_DISCARD = 0,
454 DPNI_ERROR_ACTION_CONTINUE = 1,
455 DPNI_ERROR_ACTION_SEND_TO_ERROR_QUEUE = 2
459 * struct dpni_error_cfg - Structure representing DPNI errors treatment
460 * @errors: Errors mask; use 'DPNI_ERROR__<X>
461 * @error_action: The desired action for the errors mask
462 * @set_frame_annotation: Set to '1' to mark the errors in frame annotation
463 * status (FAS); relevant only for the non-discard action
465 struct dpni_error_cfg {
467 enum dpni_error_action error_action;
468 int set_frame_annotation;
472 * dpni_set_errors_behavior() - Set errors behavior
473 * @mc_io: Pointer to MC portal's I/O object
474 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
475 * @token: Token of DPNI object
476 * @cfg: Errors configuration
478 * this function may be called numerous times with different
481 * Return: '0' on Success; Error code otherwise.
483 int dpni_set_errors_behavior(struct fsl_mc_io *mc_io,
486 struct dpni_error_cfg *cfg);
489 * DPNI buffer layout modification options
493 * Select to modify the time-stamp setting
495 #define DPNI_BUF_LAYOUT_OPT_TIMESTAMP 0x00000001
497 * Select to modify the parser-result setting; not applicable for Tx
499 #define DPNI_BUF_LAYOUT_OPT_PARSER_RESULT 0x00000002
501 * Select to modify the frame-status setting
503 #define DPNI_BUF_LAYOUT_OPT_FRAME_STATUS 0x00000004
505 * Select to modify the private-data-size setting
507 #define DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE 0x00000008
509 * Select to modify the data-alignment setting
511 #define DPNI_BUF_LAYOUT_OPT_DATA_ALIGN 0x00000010
513 * Select to modify the data-head-room setting
515 #define DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM 0x00000020
517 * Select to modify the data-tail-room setting
519 #define DPNI_BUF_LAYOUT_OPT_DATA_TAIL_ROOM 0x00000040
522 * struct dpni_buffer_layout - Structure representing DPNI buffer layout
523 * @options: Flags representing the suggested modifications to the buffer
524 * layout; Use any combination of 'DPNI_BUF_LAYOUT_OPT_<X>' flags
525 * @pass_timestamp: Pass timestamp value
526 * @pass_parser_result: Pass parser results
527 * @pass_frame_status: Pass frame status
528 * @private_data_size: Size kept for private data (in bytes)
529 * @data_align: Data alignment
530 * @data_head_room: Data head room
531 * @data_tail_room: Data tail room
533 struct dpni_buffer_layout {
536 int pass_parser_result;
537 int pass_frame_status;
538 uint16_t private_data_size;
540 uint16_t data_head_room;
541 uint16_t data_tail_room;
545 * enum dpni_queue_type - Identifies a type of queue targeted by the command
546 * @DPNI_QUEUE_RX: Rx queue
547 * @DPNI_QUEUE_TX: Tx queue
548 * @DPNI_QUEUE_TX_CONFIRM: Tx confirmation queue
549 * @DPNI_QUEUE_RX_ERR: Rx error queue
550 */enum dpni_queue_type {
553 DPNI_QUEUE_TX_CONFIRM,
558 * dpni_get_buffer_layout() - Retrieve buffer layout attributes.
559 * @mc_io: Pointer to MC portal's I/O object
560 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
561 * @token: Token of DPNI object
562 * @qtype: Type of queue to get the layout from
563 * @layout: Returns buffer layout attributes
565 * Return: '0' on Success; Error code otherwise.
567 int dpni_get_buffer_layout(struct fsl_mc_io *mc_io,
570 enum dpni_queue_type qtype,
571 struct dpni_buffer_layout *layout);
574 * dpni_set_buffer_layout() - Set buffer layout configuration.
575 * @mc_io: Pointer to MC portal's I/O object
576 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
577 * @token: Token of DPNI object
578 * @qtype: Type of queue to set layout on
579 * @layout: Buffer layout configuration
581 * Return: '0' on Success; Error code otherwise.
583 * @warning Allowed only when DPNI is disabled
585 int dpni_set_buffer_layout(struct fsl_mc_io *mc_io,
588 enum dpni_queue_type qtype,
589 const struct dpni_buffer_layout *layout);
592 * enum dpni_offload - Identifies a type of offload targeted by the command
593 * @DPNI_OFF_RX_L3_CSUM: Rx L3 checksum validation
594 * @DPNI_OFF_RX_L4_CSUM: Rx L4 checksum validation
595 * @DPNI_OFF_TX_L3_CSUM: Tx L3 checksum generation
596 * @DPNI_OFF_TX_L4_CSUM: Tx L4 checksum generation
606 * dpni_set_offload() - Set DPNI offload configuration.
607 * @mc_io: Pointer to MC portal's I/O object
608 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
609 * @token: Token of DPNI object
610 * @type: Type of DPNI offload
611 * @config: Offload configuration.
612 * For checksum offloads, non-zero value enables
615 * Return: '0' on Success; Error code otherwise.
617 * @warning Allowed only when DPNI is disabled
619 int dpni_set_offload(struct fsl_mc_io *mc_io,
622 enum dpni_offload type,
626 * dpni_get_offload() - Get DPNI offload configuration.
627 * @mc_io: Pointer to MC portal's I/O object
628 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
629 * @token: Token of DPNI object
630 * @type: Type of DPNI offload
631 * @config: Offload configuration.
632 * For checksum offloads, a value of 1 indicates that the
633 * offload is enabled.
635 * Return: '0' on Success; Error code otherwise.
637 * @warning Allowed only when DPNI is disabled
639 int dpni_get_offload(struct fsl_mc_io *mc_io,
642 enum dpni_offload type,
646 * dpni_get_qdid() - Get the Queuing Destination ID (QDID) that should be used
647 * for enqueue operations
648 * @mc_io: Pointer to MC portal's I/O object
649 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
650 * @token: Token of DPNI object
651 * @qtype: Type of queue to get QDID for. For applications lookig to
652 * transmit traffic this should be set to DPNI_QUEUE_TX
653 * @qdid: Returned virtual QDID value that should be used as an argument
654 * in all enqueue operations
656 * Return: '0' on Success; Error code otherwise.
658 int dpni_get_qdid(struct fsl_mc_io *mc_io,
661 enum dpni_queue_type qtype,
664 #define DPNI_STATISTICS_CNT 7
666 union dpni_statistics {
668 * struct page_0 - Page_0 statistics structure
669 * @ingress_all_frames: Ingress frame count
670 * @ingress_all_bytes: Ingress byte count
671 * @ingress_multicast_frames: Ingress multicast frame count
672 * @ingress_multicast_bytes: Ingress multicast byte count
673 * @ingress_broadcast_frames: Ingress broadcast frame count
674 * @ingress_broadcast_bytes: Ingress broadcast byte count
677 uint64_t ingress_all_frames;
678 uint64_t ingress_all_bytes;
679 uint64_t ingress_multicast_frames;
680 uint64_t ingress_multicast_bytes;
681 uint64_t ingress_broadcast_frames;
682 uint64_t ingress_broadcast_bytes;
685 * struct page_1 - Page_1 statistics structure
686 * @egress_all_frames: Egress frame count
687 * @egress_all_bytes: Egress byte count
688 * @egress_multicast_frames: Egress multicast frame count
689 * @egress_multicast_bytes: Egress multicast byte count
690 * @egress_broadcast_frames: Egress broadcast frame count
691 * @egress_broadcast_bytes: Egress broadcast byte count
694 uint64_t egress_all_frames;
695 uint64_t egress_all_bytes;
696 uint64_t egress_multicast_frames;
697 uint64_t egress_multicast_bytes;
698 uint64_t egress_broadcast_frames;
699 uint64_t egress_broadcast_bytes;
702 * struct page_2 - Page_2 statistics structure
703 * @ingress_filtered_frames: Ingress filtered frame count
704 * @ingress_discarded_frames: Ingress discarded frame count
705 * @ingress_nobuffer_discards: Ingress discarded frame count due to
707 * @egress_discarded_frames: Egress discarded frame count
708 * @egress_confirmed_frames: Egress confirmed frame count
711 uint64_t ingress_filtered_frames;
712 uint64_t ingress_discarded_frames;
713 uint64_t ingress_nobuffer_discards;
714 uint64_t egress_discarded_frames;
715 uint64_t egress_confirmed_frames;
718 * struct raw - raw statistics structure, used to index counters
721 uint64_t counter[DPNI_STATISTICS_CNT];
726 * Enable auto-negotiation
728 #define DPNI_LINK_OPT_AUTONEG 0x0000000000000001ULL
730 * Enable half-duplex mode
732 #define DPNI_LINK_OPT_HALF_DUPLEX 0x0000000000000002ULL
734 * Enable pause frames
736 #define DPNI_LINK_OPT_PAUSE 0x0000000000000004ULL
738 * Enable a-symmetric pause frames
740 #define DPNI_LINK_OPT_ASYM_PAUSE 0x0000000000000008ULL
743 * struct dpni_link_state - Structure representing DPNI link state
745 * @options: Mask of available options; use 'DPNI_LINK_OPT_<X>' values
746 * @up: Link state; '0' for down, '1' for up
748 struct dpni_link_state {
755 * dpni_get_link_state() - Return the link state (either up or down)
756 * @mc_io: Pointer to MC portal's I/O object
757 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
758 * @token: Token of DPNI object
759 * @state: Returned link state;
761 * Return: '0' on Success; Error code otherwise.
763 int dpni_get_link_state(struct fsl_mc_io *mc_io,
766 struct dpni_link_state *state);
769 * dpni_set_max_frame_length() - Set the maximum received frame length.
770 * @mc_io: Pointer to MC portal's I/O object
771 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
772 * @token: Token of DPNI object
773 * @max_frame_length: Maximum received frame length (in
774 * bytes); frame is discarded if its
775 * length exceeds this value
777 * Return: '0' on Success; Error code otherwise.
779 int dpni_set_max_frame_length(struct fsl_mc_io *mc_io,
782 uint16_t max_frame_length);
785 * dpni_get_max_frame_length() - Get the maximum received frame length.
786 * @mc_io: Pointer to MC portal's I/O object
787 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
788 * @token: Token of DPNI object
789 * @max_frame_length: Maximum received frame length (in
790 * bytes); frame is discarded if its
791 * length exceeds this value
793 * Return: '0' on Success; Error code otherwise.
795 int dpni_get_max_frame_length(struct fsl_mc_io *mc_io,
798 uint16_t *max_frame_length);
801 * dpni_set_multicast_promisc() - Enable/disable multicast promiscuous mode
802 * @mc_io: Pointer to MC portal's I/O object
803 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
804 * @token: Token of DPNI object
805 * @en: Set to '1' to enable; '0' to disable
807 * Return: '0' on Success; Error code otherwise.
809 int dpni_set_multicast_promisc(struct fsl_mc_io *mc_io,
815 * dpni_get_multicast_promisc() - Get multicast promiscuous mode
816 * @mc_io: Pointer to MC portal's I/O object
817 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
818 * @token: Token of DPNI object
819 * @en: Returns '1' if enabled; '0' otherwise
821 * Return: '0' on Success; Error code otherwise.
823 int dpni_get_multicast_promisc(struct fsl_mc_io *mc_io,
829 * dpni_set_unicast_promisc() - Enable/disable unicast promiscuous mode
830 * @mc_io: Pointer to MC portal's I/O object
831 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
832 * @token: Token of DPNI object
833 * @en: Set to '1' to enable; '0' to disable
835 * Return: '0' on Success; Error code otherwise.
837 int dpni_set_unicast_promisc(struct fsl_mc_io *mc_io,
843 * dpni_get_unicast_promisc() - Get unicast promiscuous mode
844 * @mc_io: Pointer to MC portal's I/O object
845 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
846 * @token: Token of DPNI object
847 * @en: Returns '1' if enabled; '0' otherwise
849 * Return: '0' on Success; Error code otherwise.
851 int dpni_get_unicast_promisc(struct fsl_mc_io *mc_io,
857 * dpni_set_primary_mac_addr() - Set the primary MAC address
858 * @mc_io: Pointer to MC portal's I/O object
859 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
860 * @token: Token of DPNI object
861 * @mac_addr: MAC address to set as primary address
863 * Return: '0' on Success; Error code otherwise.
865 int dpni_set_primary_mac_addr(struct fsl_mc_io *mc_io,
868 const uint8_t mac_addr[6]);
871 * dpni_get_primary_mac_addr() - Get the primary MAC address
872 * @mc_io: Pointer to MC portal's I/O object
873 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
874 * @token: Token of DPNI object
875 * @mac_addr: Returned MAC address
877 * Return: '0' on Success; Error code otherwise.
879 int dpni_get_primary_mac_addr(struct fsl_mc_io *mc_io,
882 uint8_t mac_addr[6]);
885 * dpni_add_mac_addr() - Add MAC address filter
886 * @mc_io: Pointer to MC portal's I/O object
887 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
888 * @token: Token of DPNI object
889 * @mac_addr: MAC address to add
891 * Return: '0' on Success; Error code otherwise.
893 int dpni_add_mac_addr(struct fsl_mc_io *mc_io,
896 const uint8_t mac_addr[6]);
899 * dpni_remove_mac_addr() - Remove MAC address filter
900 * @mc_io: Pointer to MC portal's I/O object
901 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
902 * @token: Token of DPNI object
903 * @mac_addr: MAC address to remove
905 * Return: '0' on Success; Error code otherwise.
907 int dpni_remove_mac_addr(struct fsl_mc_io *mc_io,
910 const uint8_t mac_addr[6]);
913 * dpni_clear_mac_filters() - Clear all unicast and/or multicast MAC filters
914 * @mc_io: Pointer to MC portal's I/O object
915 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
916 * @token: Token of DPNI object
917 * @unicast: Set to '1' to clear unicast addresses
918 * @multicast: Set to '1' to clear multicast addresses
920 * The primary MAC address is not cleared by this operation.
922 * Return: '0' on Success; Error code otherwise.
924 int dpni_clear_mac_filters(struct fsl_mc_io *mc_io,
931 * dpni_get_port_mac_addr() - Retrieve MAC address associated to the physical
932 * port the DPNI is attached to
933 * @mc_io: Pointer to MC portal's I/O object
934 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
935 * @token: Token of DPNI object
936 * @mac_addr: MAC address of the physical port, if any, otherwise 0
938 * The primary MAC address is not modified by this operation.
940 * Return: '0' on Success; Error code otherwise.
942 int dpni_get_port_mac_addr(struct fsl_mc_io *mc_io,
945 uint8_t mac_addr[6]);
948 * enum dpni_dist_mode - DPNI distribution mode
949 * @DPNI_DIST_MODE_NONE: No distribution
950 * @DPNI_DIST_MODE_HASH: Use hash distribution; only relevant if
951 * the 'DPNI_OPT_DIST_HASH' option was set at DPNI creation
952 * @DPNI_DIST_MODE_FS: Use explicit flow steering; only relevant if
953 * the 'DPNI_OPT_DIST_FS' option was set at DPNI creation
955 enum dpni_dist_mode {
956 DPNI_DIST_MODE_NONE = 0,
957 DPNI_DIST_MODE_HASH = 1,
958 DPNI_DIST_MODE_FS = 2
962 * enum dpni_fs_miss_action - DPNI Flow Steering miss action
963 * @DPNI_FS_MISS_DROP: In case of no-match, drop the frame
964 * @DPNI_FS_MISS_EXPLICIT_FLOWID: In case of no-match, use explicit flow-id
965 * @DPNI_FS_MISS_HASH: In case of no-match, distribute using hash
967 enum dpni_fs_miss_action {
968 DPNI_FS_MISS_DROP = 0,
969 DPNI_FS_MISS_EXPLICIT_FLOWID = 1,
970 DPNI_FS_MISS_HASH = 2
974 * struct dpni_fs_tbl_cfg - Flow Steering table configuration
975 * @miss_action: Miss action selection
976 * @default_flow_id: Used when 'miss_action = DPNI_FS_MISS_EXPLICIT_FLOWID'
978 struct dpni_fs_tbl_cfg {
979 enum dpni_fs_miss_action miss_action;
980 uint16_t default_flow_id;
984 * dpni_prepare_key_cfg() - function prepare extract parameters
985 * @cfg: defining a full Key Generation profile (rule)
986 * @key_cfg_buf: Zeroed 256 bytes of memory before mapping it to DMA
988 * This function has to be called before the following functions:
989 * - dpni_set_rx_tc_dist()
990 * - dpni_set_qos_table()
992 int dpni_prepare_key_cfg(const struct dpkg_profile_cfg *cfg,
993 uint8_t *key_cfg_buf);
996 * struct dpni_rx_tc_dist_cfg - Rx traffic class distribution configuration
997 * @dist_size: Set the distribution size;
998 * supported values: 1,2,3,4,6,7,8,12,14,16,24,28,32,48,56,64,96,
999 * 112,128,192,224,256,384,448,512,768,896,1024
1000 * @dist_mode: Distribution mode
1001 * @key_cfg_iova: I/O virtual address of 256 bytes DMA-able memory filled with
1002 * the extractions to be used for the distribution key by calling
1003 * dpni_prepare_key_cfg() relevant only when
1004 * 'dist_mode != DPNI_DIST_MODE_NONE', otherwise it can be '0'
1005 * @fs_cfg: Flow Steering table configuration; only relevant if
1006 * 'dist_mode = DPNI_DIST_MODE_FS'
1008 struct dpni_rx_tc_dist_cfg {
1010 enum dpni_dist_mode dist_mode;
1011 uint64_t key_cfg_iova;
1012 struct dpni_fs_tbl_cfg fs_cfg;
1016 * dpni_set_rx_tc_dist() - Set Rx traffic class distribution configuration
1017 * @mc_io: Pointer to MC portal's I/O object
1018 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1019 * @token: Token of DPNI object
1020 * @tc_id: Traffic class selection (0-7)
1021 * @cfg: Traffic class distribution configuration
1023 * warning: if 'dist_mode != DPNI_DIST_MODE_NONE', call dpni_prepare_key_cfg()
1024 * first to prepare the key_cfg_iova parameter
1026 * Return: '0' on Success; error code otherwise.
1028 int dpni_set_rx_tc_dist(struct fsl_mc_io *mc_io,
1032 const struct dpni_rx_tc_dist_cfg *cfg);
1034 * enum dpni_congestion_unit - DPNI congestion units
1035 * @DPNI_CONGESTION_UNIT_BYTES: bytes units
1036 * @DPNI_CONGESTION_UNIT_FRAMES: frames units
1038 enum dpni_congestion_unit {
1039 DPNI_CONGESTION_UNIT_BYTES = 0,
1040 DPNI_CONGESTION_UNIT_FRAMES
1045 * enum dpni_dest - DPNI destination types
1046 * @DPNI_DEST_NONE: Unassigned destination; The queue is set in parked mode and
1047 * does not generate FQDAN notifications; user is expected to
1048 * dequeue from the queue based on polling or other user-defined
1050 * @DPNI_DEST_DPIO: The queue is set in schedule mode and generates FQDAN
1051 * notifications to the specified DPIO; user is expected to dequeue
1052 * from the queue only after notification is received
1053 * @DPNI_DEST_DPCON: The queue is set in schedule mode and does not generate
1054 * FQDAN notifications, but is connected to the specified DPCON
1055 * object; user is expected to dequeue from the DPCON channel
1064 * struct dpni_dest_cfg - Structure representing DPNI destination parameters
1065 * @dest_type: Destination type
1066 * @dest_id: Either DPIO ID or DPCON ID, depending on the destination type
1067 * @priority: Priority selection within the DPIO or DPCON channel; valid values
1068 * are 0-1 or 0-7, depending on the number of priorities in that
1069 * channel; not relevant for 'DPNI_DEST_NONE' option
1071 struct dpni_dest_cfg {
1072 enum dpni_dest dest_type;
1077 /* DPNI congestion options */
1080 * CSCN message is written to message_iova once entering a
1081 * congestion state (see 'threshold_entry')
1083 #define DPNI_CONG_OPT_WRITE_MEM_ON_ENTER 0x00000001
1085 * CSCN message is written to message_iova once exiting a
1086 * congestion state (see 'threshold_exit')
1088 #define DPNI_CONG_OPT_WRITE_MEM_ON_EXIT 0x00000002
1090 * CSCN write will attempt to allocate into a cache (coherent write);
1091 * valid only if 'DPNI_CONG_OPT_WRITE_MEM_<X>' is selected
1093 #define DPNI_CONG_OPT_COHERENT_WRITE 0x00000004
1095 * if 'dest_cfg.dest_type != DPNI_DEST_NONE' CSCN message is sent to
1096 * DPIO/DPCON's WQ channel once entering a congestion state
1097 * (see 'threshold_entry')
1099 #define DPNI_CONG_OPT_NOTIFY_DEST_ON_ENTER 0x00000008
1101 * if 'dest_cfg.dest_type != DPNI_DEST_NONE' CSCN message is sent to
1102 * DPIO/DPCON's WQ channel once exiting a congestion state
1103 * (see 'threshold_exit')
1105 #define DPNI_CONG_OPT_NOTIFY_DEST_ON_EXIT 0x00000010
1107 * if 'dest_cfg.dest_type != DPNI_DEST_NONE' when the CSCN is written to the
1108 * sw-portal's DQRR, the DQRI interrupt is asserted immediately (if enabled)
1110 #define DPNI_CONG_OPT_INTR_COALESCING_DISABLED 0x00000020
1113 * struct dpni_congestion_notification_cfg - congestion notification
1115 * @units: units type
1116 * @threshold_entry: above this threshold we enter a congestion state.
1117 * set it to '0' to disable it
1118 * @threshold_exit: below this threshold we exit the congestion state.
1119 * @message_ctx: The context that will be part of the CSCN message
1120 * @message_iova: I/O virtual address (must be in DMA-able memory),
1121 * must be 16B aligned; valid only if 'DPNI_CONG_OPT_WRITE_MEM_<X>' is
1122 * contained in 'options'
1123 * @dest_cfg: CSCN can be send to either DPIO or DPCON WQ channel
1124 * @notification_mode: Mask of available options; use 'DPNI_CONG_OPT_<X>' values
1127 struct dpni_congestion_notification_cfg {
1128 enum dpni_congestion_unit units;
1129 uint32_t threshold_entry;
1130 uint32_t threshold_exit;
1131 uint64_t message_ctx;
1132 uint64_t message_iova;
1133 struct dpni_dest_cfg dest_cfg;
1134 uint16_t notification_mode;
1138 * dpni_set_congestion_notification() - Set traffic class congestion
1139 * notification configuration
1140 * @mc_io: Pointer to MC portal's I/O object
1141 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1142 * @token: Token of DPNI object
1143 * @qtype: Type of queue - Rx, Tx and Tx confirm types are supported
1144 * @tc_id: Traffic class selection (0-7)
1145 * @cfg: congestion notification configuration
1147 * Return: '0' on Success; error code otherwise.
1149 int dpni_set_congestion_notification(
1150 struct fsl_mc_io *mc_io,
1153 enum dpni_queue_type qtype,
1155 const struct dpni_congestion_notification_cfg *cfg);
1158 * dpni_get_congestion_notification() - Get traffic class congestion
1159 * notification configuration
1160 * @mc_io: Pointer to MC portal's I/O object
1161 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1162 * @token: Token of DPNI object
1163 * @qtype: Type of queue - Rx, Tx and Tx confirm types are supported
1164 * @tc_id: Traffic class selection (0-7)
1165 * @cfg: congestion notification configuration
1167 * Return: '0' on Success; error code otherwise.
1169 int dpni_get_congestion_notification(struct fsl_mc_io *mc_io,
1172 enum dpni_queue_type qtype,
1174 struct dpni_congestion_notification_cfg *cfg);
1178 * struct dpni_queue - Queue structure
1179 * @user_context: User data, presented to the user along with any frames
1180 * from this queue. Not relevant for Tx queues.
1184 * struct destination - Destination structure
1185 * @id: ID of the destination, only relevant if DEST_TYPE is > 0.
1186 * Identifies either a DPIO or a DPCON object.
1187 * Not relevant for Tx queues.
1188 * @type: May be one of the following:
1189 * 0 - No destination, queue can be manually
1190 * queried, but will not push traffic or
1191 * notifications to a DPIO;
1192 * 1 - The destination is a DPIO. When traffic
1193 * becomes available in the queue a FQDAN
1194 * (FQ data available notification) will be
1195 * generated to selected DPIO;
1196 * 2 - The destination is a DPCON. The queue is
1197 * associated with a DPCON object for the
1198 * purpose of scheduling between multiple
1199 * queues. The DPCON may be independently
1200 * configured to generate notifications.
1201 * Not relevant for Tx queues.
1202 * @hold_active: Hold active, maintains a queue scheduled for longer
1203 * in a DPIO during dequeue to reduce spread of traffic.
1204 * Only relevant if queues are
1205 * not affined to a single DPIO.
1209 enum dpni_dest type;
1213 uint64_t user_context;
1215 * struct flc - FD FLow Context structure
1216 * @value: FLC value to set
1217 * @stash_control: Boolean, indicates whether the 6 lowest
1218 * significant bits are used for stash control.
1227 * struct dpni_queue_id - Queue identification, used for enqueue commands
1229 * @fqid: FQID used for enqueueing to and/or configuration of this
1231 * @qdbin: Queueing bin, used to enqueue using QDID, DQBIN, QPRI.
1232 * Only relevant for Tx queues.
1234 struct dpni_queue_id {
1240 * enum dpni_confirmation_mode - Defines DPNI options supported for Tx
1242 * @DPNI_CONF_AFFINE: For each Tx queue set associated with a sender there is
1243 * an affine Tx Confirmation queue
1244 * @DPNI_CONF_SINGLE: All Tx queues are associated with a single Tx
1245 * confirmation queue
1246 * @DPNI_CONF_DISABLE: Tx frames are not confirmed. This must be associated
1247 * with proper FD set-up to have buffers release to a Buffer Pool, otherwise
1248 * buffers will be leaked
1250 enum dpni_confirmation_mode {
1257 * dpni_set_tx_confirmation_mode() - Tx confirmation mode
1258 * @mc_io: Pointer to MC portal's I/O object
1259 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1260 * @token: Token of DPNI object
1261 * @mode: Tx confirmation mode
1263 * This function is useful only when 'DPNI_OPT_TX_CONF_DISABLED' is not
1264 * selected at DPNI creation.
1265 * Calling this function with 'mode' set to DPNI_CONF_DISABLE disables all
1266 * transmit confirmation (including the private confirmation queues), regardless
1267 * of previous settings; Note that in this case, Tx error frames are still
1268 * enqueued to the general transmit errors queue.
1269 * Calling this function with 'mode' set to DPNI_CONF_SINGLE switches all
1270 * Tx confirmations to a shared Tx conf queue. The ID of the queue when
1271 * calling dpni_set/get_queue is -1.
1272 * Tx confirmation mode can only be changed while the DPNI is disabled.
1273 * Executing this command while the DPNI is enabled will return an error.
1275 * Return: '0' on Success; Error code otherwise.
1277 int dpni_set_tx_confirmation_mode(struct fsl_mc_io *mc_io,
1280 enum dpni_confirmation_mode mode);
1283 * dpni_get_api_version() - Get Data Path Network Interface API version
1284 * @mc_io: Pointer to MC portal's I/O object
1285 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1286 * @major_ver: Major version of data path network interface API
1287 * @minor_ver: Minor version of data path network interface API
1289 * Return: '0' on Success; Error code otherwise.
1291 int dpni_get_api_version(struct fsl_mc_io *mc_io,
1293 uint16_t *major_ver,
1294 uint16_t *minor_ver);
1299 #define DPNI_QUEUE_OPT_USER_CTX 0x00000001
1302 * Set queue destination configuration
1304 #define DPNI_QUEUE_OPT_DEST 0x00000002
1307 * Set FD[FLC] configuration for traffic on this queue. Note that FLC values
1308 * set with dpni_add_fs_entry, if any, take precedence over values per queue.
1310 #define DPNI_QUEUE_OPT_FLC 0x00000004
1313 * Set the queue to hold active mode. This prevents the queue from being
1314 * rescheduled between DPIOs while it carries traffic and is active on one
1315 * DPNI. Can help reduce reordering when servicing one queue on multiple
1316 * CPUs, but the queue is also less likely to push data to multiple CPUs
1317 * especially when congested.
1319 #define DPNI_QUEUE_OPT_HOLD_ACTIVE 0x00000008
1322 * dpni_set_queue() - Set queue parameters
1323 * @mc_io: Pointer to MC portal's I/O object
1324 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1325 * @token: Token of DPNI object
1326 * @qtype: Type of queue - all queue types are supported, although
1327 * the command is ignored for Tx
1328 * @tc: Traffic class, in range 0 to NUM_TCS - 1
1329 * @index: Selects the specific queue out of the set
1330 * allocated for the same TC.Value must be in
1331 * range 0 to NUM_QUEUES - 1
1332 * @options: A combination of DPNI_QUEUE_OPT_ values that control
1333 * what configuration options are set on the queue
1334 * @queue: Queue configuration structure
1336 * Return: '0' on Success; Error code otherwise.
1338 int dpni_set_queue(struct fsl_mc_io *mc_io,
1341 enum dpni_queue_type qtype,
1345 const struct dpni_queue *queue);
1348 * dpni_get_queue() - Get queue parameters
1349 * @mc_io: Pointer to MC portal's I/O object
1350 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1351 * @token: Token of DPNI object
1352 * @qtype: Type of queue - all queue types are supported
1353 * @tc: Traffic class, in range 0 to NUM_TCS - 1
1354 * @index: Selects the specific queue out of the set allocated
1355 * for the same TC. Value must be in range 0 to
1357 * @queue: Queue configuration structure
1358 * @qid: Queue identification
1360 * This function returns current queue configuration which can be changed by
1361 * calling dpni_set_queue, and queue identification information.
1362 * Returned qid.fqid and/or qid.qdbin values can be used to:
1363 * - enqueue traffic for Tx queues,
1364 * - perform volatile dequeue for Rx and, if applicable, Tx confirmation
1366 * - retrieve queue state.
1368 * All these operations are supported through the DPIO run-time API.
1370 * Return: '0' on Success; Error code otherwise.
1372 int dpni_get_queue(struct fsl_mc_io *mc_io,
1375 enum dpni_queue_type qtype,
1378 struct dpni_queue *queue,
1379 struct dpni_queue_id *qid);
1382 * dpni_get_statistics() - Get DPNI statistics
1383 * @mc_io: Pointer to MC portal's I/O object
1384 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1385 * @token: Token of DPNI object
1386 * @page: Selects the statistics page to retrieve, see
1387 * DPNI_GET_STATISTICS output.
1388 * Pages are numbered 0 to 2.
1389 * @stat: Structure containing the statistics
1391 * Return: '0' on Success; Error code otherwise.
1393 int dpni_get_statistics(struct fsl_mc_io *mc_io,
1397 union dpni_statistics *stat);
1400 * dpni_reset_statistics() - Clears DPNI statistics
1401 * @mc_io: Pointer to MC portal's I/O object
1402 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1403 * @token: Token of DPNI object
1405 * Return: '0' on Success; Error code otherwise.
1407 int dpni_reset_statistics(struct fsl_mc_io *mc_io,
1412 * enum dpni_congestion_point - Structure representing congestion point
1413 * @DPNI_CP_QUEUE: Set taildrop per queue, identified by QUEUE_TYPE, TC and
1415 * @DPNI_CP_GROUP: Set taildrop per queue group. Depending on options used
1416 * to define the DPNI this can be either per
1417 * TC (default) or per interface
1418 * (DPNI_OPT_SHARED_CONGESTION set at DPNI create).
1419 * QUEUE_INDEX is ignored if this type is used.
1421 enum dpni_congestion_point {
1427 * struct dpni_taildrop - Structure representing the taildrop
1428 * @enable: Indicates whether the taildrop is active or not.
1429 * @units: Indicates the unit of THRESHOLD. Queue taildrop only
1430 * supports byte units, this field is ignored and
1431 * assumed = 0 if CONGESTION_POINT is 0.
1432 * @threshold: Threshold value, in units identified by UNITS field. Value 0
1433 * cannot be used as a valid taildrop threshold,
1434 * THRESHOLD must be > 0 if the taildrop is
1437 struct dpni_taildrop {
1439 enum dpni_congestion_unit units;
1444 * dpni_set_taildrop() - Set taildrop per queue or TC
1446 * Setting a per-TC taildrop (cg_point = DPNI_CP_GROUP) will reset any current
1447 * congestion notification or early drop (WRED) configuration previously applied
1450 * @mc_io: Pointer to MC portal's I/O object
1451 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1452 * @token: Token of DPNI object
1453 * @cg_point: Congestion point. DPNI_CP_QUEUE is only supported in
1454 * combination with DPNI_QUEUE_RX.
1455 * @q_type: Queue type, can be DPNI_QUEUE_RX or DPNI_QUEUE_TX.
1456 * @tc: Traffic class to apply this taildrop to
1457 * @q_index: Index of the queue if the DPNI supports multiple queues for
1458 * traffic distribution.
1459 * Ignored if CONGESTION_POINT is not DPNI_CP_QUEUE.
1460 * @taildrop: Taildrop structure
1462 * Return: '0' on Success; Error code otherwise.
1464 int dpni_set_taildrop(struct fsl_mc_io *mc_io,
1467 enum dpni_congestion_point cg_point,
1468 enum dpni_queue_type q_type,
1471 struct dpni_taildrop *taildrop);
1474 * dpni_get_taildrop() - Get taildrop information
1475 * @mc_io: Pointer to MC portal's I/O object
1476 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
1477 * @token: Token of DPNI object
1478 * @cg_point: Congestion point
1480 * @tc: Traffic class to apply this taildrop to
1481 * @q_index: Index of the queue if the DPNI supports multiple queues for
1482 * traffic distribution. Ignored if CONGESTION_POINT
1484 * @taildrop: Taildrop structure
1486 * Return: '0' on Success; Error code otherwise.
1488 int dpni_get_taildrop(struct fsl_mc_io *mc_io,
1491 enum dpni_congestion_point cg_point,
1492 enum dpni_queue_type q_type,
1495 struct dpni_taildrop *taildrop);
1496 #endif /* __FSL_DPNI_H */