1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2015-2020 Amazon.com, Inc. or its affiliates.
11 #define ENA_MAX_NUM_IO_QUEUES 128U
12 /* We need to queues for each IO (on for Tx and one for Rx) */
13 #define ENA_TOTAL_NUM_QUEUES (2 * (ENA_MAX_NUM_IO_QUEUES))
15 #define ENA_MAX_HANDLERS 256
17 #define ENA_MAX_PHYS_ADDR_SIZE_BITS 48
20 #define ENA_REG_READ_TIMEOUT 200000
22 #define ADMIN_SQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aq_entry))
23 #define ADMIN_CQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_acq_entry))
24 #define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aenq_entry))
26 #define ENA_CDESC_RING_SIZE_ALIGNMENT (1 << 12) /* 4K */
28 /*****************************************************************************/
29 /*****************************************************************************/
30 /* ENA adaptive interrupt moderation settings */
32 #define ENA_INTR_INITIAL_TX_INTERVAL_USECS ENA_INTR_INITIAL_TX_INTERVAL_USECS_PLAT
33 #define ENA_INTR_INITIAL_RX_INTERVAL_USECS 0
34 #define ENA_DEFAULT_INTR_DELAY_RESOLUTION 1
36 #define ENA_HASH_KEY_SIZE 40
38 #define ENA_HW_HINTS_NO_TIMEOUT 0xFFFF
40 #define ENA_FEATURE_MAX_QUEUE_EXT_VER 1
42 struct ena_llq_configurations {
43 enum ena_admin_llq_header_location llq_header_location;
44 enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
45 enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
46 enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
47 u16 llq_ring_entry_size_value;
50 enum queue_direction {
51 ENA_COM_IO_QUEUE_DIRECTION_TX,
52 ENA_COM_IO_QUEUE_DIRECTION_RX
56 dma_addr_t paddr; /**< Buffer physical address */
57 u16 len; /**< Buffer length in bytes */
60 struct ena_com_rx_buf_info {
65 struct ena_com_io_desc_addr {
66 u8 __iomem *pbuf_dev_addr; /* LLQ address */
69 ena_mem_handle_t mem_handle;
72 struct ena_com_tx_meta {
76 u16 l4_hdr_len; /* In words */
79 struct ena_com_llq_info {
80 u16 header_location_ctrl;
82 u16 desc_list_entry_size_ctrl;
83 u16 desc_list_entry_size;
84 u16 descs_num_before_header;
86 u16 max_entries_in_tx_burst;
87 bool disable_meta_caching;
90 struct ena_com_io_cq {
91 struct ena_com_io_desc_addr cdesc_addr;
94 /* Interrupt unmask register */
95 u32 __iomem *unmask_reg;
97 /* The completion queue head doorbell register */
98 u32 __iomem *cq_head_db_reg;
100 /* numa configuration register (for TPH) */
101 u32 __iomem *numa_node_cfg_reg;
103 /* The value to write to the above register to unmask
104 * the interrupt of this queue
108 enum queue_direction direction;
110 /* holds the number of cdesc of the current packet */
111 u16 cur_rx_pkt_cdesc_count;
112 /* save the firt cdesc idx of the current packet */
113 u16 cur_rx_pkt_cdesc_start_idx;
119 /* Device queue index */
122 u16 last_head_update;
124 u8 cdesc_entry_size_in_bytes;
126 } ____cacheline_aligned;
128 struct ena_com_io_bounce_buffer_control {
132 u16 buffers_num; /* Must be a power of 2 */
135 /* This struct is to keep tracking the current location of the next llq entry */
136 struct ena_com_llq_pkt_ctrl {
139 u16 descs_left_in_line;
142 struct ena_com_io_sq {
143 struct ena_com_io_desc_addr desc_addr;
146 u32 __iomem *db_addr;
147 u8 __iomem *header_addr;
149 enum queue_direction direction;
150 enum ena_admin_placement_policy_type mem_queue_type;
152 bool disable_meta_caching;
155 struct ena_com_tx_meta cached_tx_meta;
156 struct ena_com_llq_info llq_info;
157 struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
158 struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
166 u16 llq_last_copy_tail;
167 u32 tx_max_header_size;
171 u16 entries_in_tx_burst_left;
172 } ____cacheline_aligned;
174 struct ena_com_admin_cq {
175 struct ena_admin_acq_entry *entries;
176 ena_mem_handle_t mem_handle;
183 struct ena_com_admin_sq {
184 struct ena_admin_aq_entry *entries;
185 ena_mem_handle_t mem_handle;
188 u32 __iomem *db_addr;
196 struct ena_com_stats_admin {
204 struct ena_com_admin_queue {
207 struct ena_com_dev *ena_dev;
208 ena_spinlock_t q_lock; /* spinlock for the admin queue */
210 struct ena_comp_ctx *comp_ctx;
211 u32 completion_timeout;
213 struct ena_com_admin_cq cq;
214 struct ena_com_admin_sq sq;
216 /* Indicate if the admin queue should poll for completion */
219 /* Define if fallback to polling mode should occur */
224 /* Indicate that the ena was initialized and can
225 * process new admin commands
229 /* Count the number of outstanding admin commands */
230 ena_atomic32_t outstanding_cmds;
232 struct ena_com_stats_admin stats;
235 struct ena_aenq_handlers;
237 struct ena_com_aenq {
240 struct ena_admin_aenq_entry *entries;
242 ena_mem_handle_t mem_handle;
244 struct ena_aenq_handlers *aenq_handlers;
247 struct ena_com_mmio_read {
248 struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
249 dma_addr_t read_resp_dma_addr;
250 ena_mem_handle_t read_resp_mem_handle;
251 u32 reg_read_to; /* in us */
253 bool readless_supported;
254 /* spin lock to ensure a single outstanding read */
260 u16 *host_rss_ind_tbl;
261 struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
262 dma_addr_t rss_ind_tbl_dma_addr;
263 ena_mem_handle_t rss_ind_tbl_mem_handle;
267 enum ena_admin_hash_functions hash_func;
268 struct ena_admin_feature_rss_flow_hash_control *hash_key;
269 dma_addr_t hash_key_dma_addr;
270 ena_mem_handle_t hash_key_mem_handle;
274 struct ena_admin_feature_rss_hash_control *hash_ctrl;
275 dma_addr_t hash_ctrl_dma_addr;
276 ena_mem_handle_t hash_ctrl_mem_handle;
280 struct ena_host_attribute {
282 u8 *debug_area_virt_addr;
283 dma_addr_t debug_area_dma_addr;
284 ena_mem_handle_t debug_area_dma_handle;
287 /* Host information */
288 struct ena_admin_host_info *host_info;
289 dma_addr_t host_info_dma_addr;
290 ena_mem_handle_t host_info_dma_handle;
293 /* Each ena_dev is a PCI function. */
295 struct ena_com_admin_queue admin_queue;
296 struct ena_com_aenq aenq;
297 struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
298 struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
300 void __iomem *mem_bar;
303 ena_netdev *net_device;
305 enum ena_admin_placement_policy_type tx_mem_queue_type;
306 u32 tx_max_header_size;
307 u16 stats_func; /* Selected function for extended statistic dump */
308 u16 stats_queue; /* Selected queue for extended statistic dump */
310 struct ena_com_mmio_read mmio_read;
313 u32 supported_features;
316 struct ena_host_attribute host_attr;
317 bool adaptive_coalescing;
318 u16 intr_delay_resolution;
320 /* interrupt moderation intervals are in usec divided by
321 * intr_delay_resolution, which is supplied by the device.
323 u32 intr_moder_tx_interval;
324 u32 intr_moder_rx_interval;
326 struct ena_intr_moder_entry *intr_moder_tbl;
328 struct ena_com_llq_info llq_info;
330 u32 ena_min_poll_delay_us;
333 struct ena_com_dev_get_features_ctx {
334 struct ena_admin_queue_feature_desc max_queues;
335 struct ena_admin_queue_ext_feature_desc max_queue_ext;
336 struct ena_admin_device_attr_feature_desc dev_attr;
337 struct ena_admin_feature_aenq_desc aenq;
338 struct ena_admin_feature_offload_desc offload;
339 struct ena_admin_ena_hw_hints hw_hints;
340 struct ena_admin_feature_llq_desc llq;
341 struct ena_admin_feature_rss_ind_table ind_table;
344 struct ena_com_create_io_ctx {
345 enum ena_admin_placement_policy_type mem_queue_type;
346 enum queue_direction direction;
353 typedef void (*ena_aenq_handler)(void *data,
354 struct ena_admin_aenq_entry *aenq_e);
356 /* Holds aenq handlers. Indexed by AENQ event group */
357 struct ena_aenq_handlers {
358 ena_aenq_handler handlers[ENA_MAX_HANDLERS];
359 ena_aenq_handler unimplemented_handler;
362 /*****************************************************************************/
363 /*****************************************************************************/
364 #if defined(__cplusplus)
368 /* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
369 * @ena_dev: ENA communication layer struct
371 * Initialize the register read mechanism.
373 * @note: This method must be the first stage in the initialization sequence.
375 * @return - 0 on success, negative value on failure.
377 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
379 /* ena_com_set_mmio_read_mode - Enable/disable the indirect mmio reg read mechanism
380 * @ena_dev: ENA communication layer struct
381 * @readless_supported: readless mode (enable/disable)
383 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
384 bool readless_supported);
386 /* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
387 * value physical address.
388 * @ena_dev: ENA communication layer struct
390 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
392 /* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
393 * @ena_dev: ENA communication layer struct
395 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
397 /* ena_com_admin_init - Init the admin and the async queues
398 * @ena_dev: ENA communication layer struct
399 * @aenq_handlers: Those handlers to be called upon event.
401 * Initialize the admin submission and completion queues.
402 * Initialize the asynchronous events notification queues.
404 * @return - 0 on success, negative value on failure.
406 int ena_com_admin_init(struct ena_com_dev *ena_dev,
407 struct ena_aenq_handlers *aenq_handlers);
409 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
410 * @ena_dev: ENA communication layer struct
412 * @note: Before calling this method, the caller must validate that the device
413 * won't send any additional admin completions/aenq.
414 * To achieve that, a FLR is recommended.
416 void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
418 /* ena_com_dev_reset - Perform device FLR to the device.
419 * @ena_dev: ENA communication layer struct
420 * @reset_reason: Specify what is the trigger for the reset in case of an error.
422 * @return - 0 on success, negative value on failure.
424 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
425 enum ena_regs_reset_reason_types reset_reason);
427 /* ena_com_create_io_queue - Create io queue.
428 * @ena_dev: ENA communication layer struct
429 * @ctx - create context structure
431 * Create the submission and the completion queues.
433 * @return - 0 on success, negative value on failure.
435 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
436 struct ena_com_create_io_ctx *ctx);
438 /* ena_com_destroy_io_queue - Destroy IO queue with the queue id - qid.
439 * @ena_dev: ENA communication layer struct
440 * @qid - the caller virtual queue id.
442 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
444 /* ena_com_get_io_handlers - Return the io queue handlers
445 * @ena_dev: ENA communication layer struct
446 * @qid - the caller virtual queue id.
447 * @io_sq - IO submission queue handler
448 * @io_cq - IO completion queue handler.
450 * @return - 0 on success, negative value on failure.
452 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
453 struct ena_com_io_sq **io_sq,
454 struct ena_com_io_cq **io_cq);
456 /* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
457 * @ena_dev: ENA communication layer struct
459 * After this method, aenq event can be received via AENQ.
461 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
463 /* ena_com_set_admin_running_state - Set the state of the admin queue
464 * @ena_dev: ENA communication layer struct
466 * Change the state of the admin queue (enable/disable)
468 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
470 /* ena_com_get_admin_running_state - Get the admin queue state
471 * @ena_dev: ENA communication layer struct
473 * Retrieve the state of the admin queue (enable/disable)
475 * @return - current polling mode (enable/disable)
477 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
479 /* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
480 * @ena_dev: ENA communication layer struct
481 * @polling: ENAble/Disable polling mode
483 * Set the admin completion mode.
485 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
487 /* ena_com_get_admin_polling_mode - Get the admin completion queue polling mode
488 * @ena_dev: ENA communication layer struct
490 * Get the admin completion mode.
491 * If polling mode is on, ena_com_execute_admin_command will perform a
492 * polling on the admin completion queue for the commands completion,
493 * otherwise it will wait on wait event.
497 bool ena_com_get_admin_polling_mode(struct ena_com_dev *ena_dev);
499 /* ena_com_set_admin_auto_polling_mode - Enable autoswitch to polling mode
500 * @ena_dev: ENA communication layer struct
501 * @polling: Enable/Disable polling mode
503 * Set the autopolling mode.
504 * If autopolling is on:
505 * In case of missing interrupt when data is available switch to polling.
507 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
510 /* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
511 * @ena_dev: ENA communication layer struct
513 * This method goes over the admin completion queue and wakes up all the pending
514 * threads that wait on the commands wait event.
516 * @note: Should be called after MSI-X interrupt.
518 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
520 /* ena_com_aenq_intr_handler - AENQ interrupt handler
521 * @ena_dev: ENA communication layer struct
523 * This method goes over the async event notification queue and calls the proper
526 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data);
528 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
529 * @ena_dev: ENA communication layer struct
531 * This method aborts all the outstanding admin commands.
532 * The caller should then call ena_com_wait_for_abort_completion to make sure
533 * all the commands were completed.
535 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
537 /* ena_com_wait_for_abort_completion - Wait for admin commands abort.
538 * @ena_dev: ENA communication layer struct
540 * This method waits until all the outstanding admin commands are completed.
542 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
544 /* ena_com_validate_version - Validate the device parameters
545 * @ena_dev: ENA communication layer struct
547 * This method verifies the device parameters are the same as the saved
548 * parameters in ena_dev.
549 * This method is useful after device reset, to validate the device mac address
550 * and the device offloads are the same as before the reset.
552 * @return - 0 on success negative value otherwise.
554 int ena_com_validate_version(struct ena_com_dev *ena_dev);
556 /* ena_com_get_link_params - Retrieve physical link parameters.
557 * @ena_dev: ENA communication layer struct
558 * @resp: Link parameters
560 * Retrieve the physical link parameters,
561 * like speed, auto-negotiation and full duplex support.
563 * @return - 0 on Success negative value otherwise.
565 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
566 struct ena_admin_get_feat_resp *resp);
568 /* ena_com_get_dma_width - Retrieve physical dma address width the device
570 * @ena_dev: ENA communication layer struct
572 * Retrieve the maximum physical address bits the device can handle.
574 * @return: > 0 on Success and negative value otherwise.
576 int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
578 /* ena_com_set_aenq_config - Set aenq groups configurations
579 * @ena_dev: ENA communication layer struct
580 * @groups flag: bit fields flags of enum ena_admin_aenq_group.
582 * Configure which aenq event group the driver would like to receive.
584 * @return: 0 on Success and negative value otherwise.
586 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
588 /* ena_com_get_dev_attr_feat - Get device features
589 * @ena_dev: ENA communication layer struct
590 * @get_feat_ctx: returned context that contain the get features.
592 * @return: 0 on Success and negative value otherwise.
594 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
595 struct ena_com_dev_get_features_ctx *get_feat_ctx);
597 /* ena_com_get_dev_basic_stats - Get device basic statistics
598 * @ena_dev: ENA communication layer struct
599 * @stats: stats return value
601 * @return: 0 on Success and negative value otherwise.
603 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
604 struct ena_admin_basic_stats *stats);
606 /* ena_com_get_eni_stats - Get extended network interface statistics
607 * @ena_dev: ENA communication layer struct
608 * @stats: stats return value
610 * @return: 0 on Success and negative value otherwise.
612 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
613 struct ena_admin_eni_stats *stats);
615 /* ena_com_set_dev_mtu - Configure the device mtu.
616 * @ena_dev: ENA communication layer struct
619 * @return: 0 on Success and negative value otherwise.
621 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu);
623 /* ena_com_get_offload_settings - Retrieve the device offloads capabilities
624 * @ena_dev: ENA communication layer struct
625 * @offlad: offload return value
627 * @return: 0 on Success and negative value otherwise.
629 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
630 struct ena_admin_feature_offload_desc *offload);
632 /* ena_com_rss_init - Init RSS
633 * @ena_dev: ENA communication layer struct
634 * @log_size: indirection log size
636 * Allocate RSS/RFS resources.
637 * The caller then can configure rss using ena_com_set_hash_function,
638 * ena_com_set_hash_ctrl and ena_com_indirect_table_set.
640 * @return: 0 on Success and negative value otherwise.
642 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
644 /* ena_com_rss_destroy - Destroy rss
645 * @ena_dev: ENA communication layer struct
647 * Free all the RSS/RFS resources.
649 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
651 /* ena_com_get_current_hash_function - Get RSS hash function
652 * @ena_dev: ENA communication layer struct
654 * Return the current hash function.
655 * @return: 0 or one of the ena_admin_hash_functions values.
657 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);
659 /* ena_com_fill_hash_function - Fill RSS hash function
660 * @ena_dev: ENA communication layer struct
661 * @func: The hash function (Toeplitz or crc)
662 * @key: Hash key (for toeplitz hash)
663 * @key_len: key length (max length 10 DW)
664 * @init_val: initial value for the hash function
666 * Fill the ena_dev resources with the desire hash function, hash key, key_len
667 * and key initial value (if needed by the hash function).
668 * To flush the key into the device the caller should call
669 * ena_com_set_hash_function.
671 * @return: 0 on Success and negative value otherwise.
673 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
674 enum ena_admin_hash_functions func,
675 const u8 *key, u16 key_len, u32 init_val);
677 /* ena_com_set_hash_function - Flush the hash function and it dependencies to
679 * @ena_dev: ENA communication layer struct
681 * Flush the hash function and it dependencies (key, key length and
682 * initial value) if needed.
684 * @note: Prior to this method the caller should call ena_com_fill_hash_function
686 * @return: 0 on Success and negative value otherwise.
688 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
690 /* ena_com_get_hash_function - Retrieve the hash function from the device.
691 * @ena_dev: ENA communication layer struct
692 * @func: hash function
694 * Retrieve the hash function from the device.
696 * @note: If the caller called ena_com_fill_hash_function but didn't flush
697 * it to the device, the new configuration will be lost.
699 * @return: 0 on Success and negative value otherwise.
701 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
702 enum ena_admin_hash_functions *func);
704 /* ena_com_get_hash_key - Retrieve the hash key
705 * @ena_dev: ENA communication layer struct
708 * Retrieve the hash key.
710 * @note: If the caller called ena_com_fill_hash_key but didn't flush
711 * it to the device, the new configuration will be lost.
713 * @return: 0 on Success and negative value otherwise.
715 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
716 /* ena_com_fill_hash_ctrl - Fill RSS hash control
717 * @ena_dev: ENA communication layer struct.
718 * @proto: The protocol to configure.
719 * @hash_fields: bit mask of ena_admin_flow_hash_fields
721 * Fill the ena_dev resources with the desire hash control (the ethernet
722 * fields that take part of the hash) for a specific protocol.
723 * To flush the hash control to the device, the caller should call
724 * ena_com_set_hash_ctrl.
726 * @return: 0 on Success and negative value otherwise.
728 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
729 enum ena_admin_flow_hash_proto proto,
732 /* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
733 * @ena_dev: ENA communication layer struct
735 * Flush the hash control (the ethernet fields that take part of the hash)
737 * @note: Prior to this method the caller should call ena_com_fill_hash_ctrl.
739 * @return: 0 on Success and negative value otherwise.
741 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
743 /* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
744 * @ena_dev: ENA communication layer struct
745 * @proto: The protocol to retrieve.
746 * @fields: bit mask of ena_admin_flow_hash_fields.
748 * Retrieve the hash control from the device.
750 * @note: If the caller called ena_com_fill_hash_ctrl but didn't flush
751 * it to the device, the new configuration will be lost.
753 * @return: 0 on Success and negative value otherwise.
755 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
756 enum ena_admin_flow_hash_proto proto,
759 /* ena_com_set_default_hash_ctrl - Set the hash control to a default
761 * @ena_dev: ENA communication layer struct
763 * Fill the ena_dev resources with the default hash control configuration.
764 * To flush the hash control to the device, the caller should call
765 * ena_com_set_hash_ctrl.
767 * @return: 0 on Success and negative value otherwise.
769 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
771 /* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
773 * @ena_dev: ENA communication layer struct.
774 * @entry_idx - indirection table entry.
775 * @entry_value - redirection value
777 * Fill a single entry of the RSS indirection table in the ena_dev resources.
778 * To flush the indirection table to the device, the called should call
779 * ena_com_indirect_table_set.
781 * @return: 0 on Success and negative value otherwise.
783 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
784 u16 entry_idx, u16 entry_value);
786 /* ena_com_indirect_table_set - Flush the indirection table to the device.
787 * @ena_dev: ENA communication layer struct
789 * Flush the indirection hash control to the device.
790 * Prior to this method the caller should call ena_com_indirect_table_fill_entry
792 * @return: 0 on Success and negative value otherwise.
794 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
796 /* ena_com_indirect_table_get - Retrieve the indirection table from the device.
797 * @ena_dev: ENA communication layer struct
798 * @ind_tbl: indirection table
800 * Retrieve the RSS indirection table from the device.
802 * @note: If the caller called ena_com_indirect_table_fill_entry but didn't flush
803 * it to the device, the new configuration will be lost.
805 * @return: 0 on Success and negative value otherwise.
807 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
809 /* ena_com_allocate_host_info - Allocate host info resources.
810 * @ena_dev: ENA communication layer struct
812 * @return: 0 on Success and negative value otherwise.
814 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
816 /* ena_com_allocate_debug_area - Allocate debug area.
817 * @ena_dev: ENA communication layer struct
818 * @debug_area_size - debug area size.
820 * @return: 0 on Success and negative value otherwise.
822 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
823 u32 debug_area_size);
825 /* ena_com_delete_debug_area - Free the debug area resources.
826 * @ena_dev: ENA communication layer struct
828 * Free the allocated debug area.
830 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
832 /* ena_com_delete_host_info - Free the host info resources.
833 * @ena_dev: ENA communication layer struct
835 * Free the allocated host info.
837 void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
839 /* ena_com_set_host_attributes - Update the device with the host
840 * attributes (debug area and host info) base address.
841 * @ena_dev: ENA communication layer struct
843 * @return: 0 on Success and negative value otherwise.
845 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
847 /* ena_com_create_io_cq - Create io completion queue.
848 * @ena_dev: ENA communication layer struct
849 * @io_cq - io completion queue handler
851 * Create IO completion queue.
853 * @return - 0 on success, negative value on failure.
855 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
856 struct ena_com_io_cq *io_cq);
858 /* ena_com_destroy_io_cq - Destroy io completion queue.
859 * @ena_dev: ENA communication layer struct
860 * @io_cq - io completion queue handler
862 * Destroy IO completion queue.
864 * @return - 0 on success, negative value on failure.
866 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
867 struct ena_com_io_cq *io_cq);
869 /* ena_com_execute_admin_command - Execute admin command
870 * @admin_queue: admin queue.
871 * @cmd: the admin command to execute.
872 * @cmd_size: the command size.
873 * @cmd_completion: command completion return value.
874 * @cmd_comp_size: command completion size.
876 * Submit an admin command and then wait until the device returns a
878 * The completion will be copied into cmd_comp.
880 * @return - 0 on success, negative value on failure.
882 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
883 struct ena_admin_aq_entry *cmd,
885 struct ena_admin_acq_entry *cmd_comp,
886 size_t cmd_comp_size);
888 /* ena_com_init_interrupt_moderation - Init interrupt moderation
889 * @ena_dev: ENA communication layer struct
891 * @return - 0 on success, negative value on failure.
893 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
895 /* ena_com_interrupt_moderation_supported - Return if interrupt moderation
896 * capability is supported by the device.
898 * @return - supported or not.
900 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
902 /* ena_com_update_nonadaptive_moderation_interval_tx - Update the
903 * non-adaptive interval in Tx direction.
904 * @ena_dev: ENA communication layer struct
905 * @tx_coalesce_usecs: Interval in usec.
907 * @return - 0 on success, negative value on failure.
909 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
910 u32 tx_coalesce_usecs);
912 /* ena_com_update_nonadaptive_moderation_interval_rx - Update the
913 * non-adaptive interval in Rx direction.
914 * @ena_dev: ENA communication layer struct
915 * @rx_coalesce_usecs: Interval in usec.
917 * @return - 0 on success, negative value on failure.
919 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
920 u32 rx_coalesce_usecs);
922 /* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
923 * non-adaptive interval in Tx direction.
924 * @ena_dev: ENA communication layer struct
926 * @return - interval in usec
928 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
930 /* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
931 * non-adaptive interval in Rx direction.
932 * @ena_dev: ENA communication layer struct
934 * @return - interval in usec
936 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
938 /* ena_com_config_dev_mode - Configure the placement policy of the device.
939 * @ena_dev: ENA communication layer struct
940 * @llq_features: LLQ feature descriptor, retrieve via
941 * ena_com_get_dev_attr_feat.
942 * @ena_llq_config: The default driver LLQ parameters configurations
944 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
945 struct ena_admin_feature_llq_desc *llq_features,
946 struct ena_llq_configurations *llq_default_config);
948 /* ena_com_io_sq_to_ena_dev - Extract ena_com_dev using contained field io_sq.
949 * @io_sq: IO submit queue struct
951 * @return - ena_com_dev struct extracted from io_sq
953 static inline struct ena_com_dev *ena_com_io_sq_to_ena_dev(struct ena_com_io_sq *io_sq)
955 return container_of(io_sq, struct ena_com_dev, io_sq_queues[io_sq->qid]);
958 /* ena_com_io_cq_to_ena_dev - Extract ena_com_dev using contained field io_cq.
959 * @io_sq: IO submit queue struct
961 * @return - ena_com_dev struct extracted from io_sq
963 static inline struct ena_com_dev *ena_com_io_cq_to_ena_dev(struct ena_com_io_cq *io_cq)
965 return container_of(io_cq, struct ena_com_dev, io_cq_queues[io_cq->qid]);
968 static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
970 return ena_dev->adaptive_coalescing;
973 static inline void ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
975 ena_dev->adaptive_coalescing = true;
978 static inline void ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
980 ena_dev->adaptive_coalescing = false;
983 /* ena_com_update_intr_reg - Prepare interrupt register
984 * @intr_reg: interrupt register to update.
985 * @rx_delay_interval: Rx interval in usecs
986 * @tx_delay_interval: Tx interval in usecs
987 * @unmask: unmask enable/disable
989 * Prepare interrupt update register with the supplied parameters.
991 static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
992 u32 rx_delay_interval,
993 u32 tx_delay_interval,
996 intr_reg->intr_control = 0;
997 intr_reg->intr_control |= rx_delay_interval &
998 ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
1000 intr_reg->intr_control |=
1001 (tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
1002 & ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK;
1005 intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
1008 static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
1010 u16 size, buffers_num;
1013 size = bounce_buf_ctrl->buffer_size;
1014 buffers_num = bounce_buf_ctrl->buffers_num;
1016 buf = bounce_buf_ctrl->base_buffer +
1017 (bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
1019 prefetchw(bounce_buf_ctrl->base_buffer +
1020 (bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
1025 #if defined(__cplusplus)
1027 #endif /* __cplusplus */
1028 #endif /* !(ENA_COM) */