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 /*****************************************************************************/
27 /*****************************************************************************/
28 /* ENA adaptive interrupt moderation settings */
30 #define ENA_INTR_INITIAL_TX_INTERVAL_USECS ENA_INTR_INITIAL_TX_INTERVAL_USECS_PLAT
31 #define ENA_INTR_INITIAL_RX_INTERVAL_USECS 0
32 #define ENA_DEFAULT_INTR_DELAY_RESOLUTION 1
34 #define ENA_HASH_KEY_SIZE 40
36 #define ENA_HW_HINTS_NO_TIMEOUT 0xFFFF
38 #define ENA_FEATURE_MAX_QUEUE_EXT_VER 1
40 struct ena_llq_configurations {
41 enum ena_admin_llq_header_location llq_header_location;
42 enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
43 enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
44 enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
45 u16 llq_ring_entry_size_value;
48 enum queue_direction {
49 ENA_COM_IO_QUEUE_DIRECTION_TX,
50 ENA_COM_IO_QUEUE_DIRECTION_RX
54 dma_addr_t paddr; /**< Buffer physical address */
55 u16 len; /**< Buffer length in bytes */
58 struct ena_com_rx_buf_info {
63 struct ena_com_io_desc_addr {
64 u8 __iomem *pbuf_dev_addr; /* LLQ address */
67 ena_mem_handle_t mem_handle;
70 struct ena_com_tx_meta {
74 u16 l4_hdr_len; /* In words */
77 struct ena_com_llq_info {
78 u16 header_location_ctrl;
80 u16 desc_list_entry_size_ctrl;
81 u16 desc_list_entry_size;
82 u16 descs_num_before_header;
84 u16 max_entries_in_tx_burst;
85 bool disable_meta_caching;
88 struct ena_com_io_cq {
89 struct ena_com_io_desc_addr cdesc_addr;
92 /* Interrupt unmask register */
93 u32 __iomem *unmask_reg;
95 /* The completion queue head doorbell register */
96 u32 __iomem *cq_head_db_reg;
98 /* numa configuration register (for TPH) */
99 u32 __iomem *numa_node_cfg_reg;
101 /* The value to write to the above register to unmask
102 * the interrupt of this queue
106 enum queue_direction direction;
108 /* holds the number of cdesc of the current packet */
109 u16 cur_rx_pkt_cdesc_count;
110 /* save the firt cdesc idx of the current packet */
111 u16 cur_rx_pkt_cdesc_start_idx;
117 /* Device queue index */
120 u16 last_head_update;
122 u8 cdesc_entry_size_in_bytes;
124 } ____cacheline_aligned;
126 struct ena_com_io_bounce_buffer_control {
130 u16 buffers_num; /* Must be a power of 2 */
133 /* This struct is to keep tracking the current location of the next llq entry */
134 struct ena_com_llq_pkt_ctrl {
137 u16 descs_left_in_line;
140 struct ena_com_io_sq {
141 struct ena_com_io_desc_addr desc_addr;
144 u32 __iomem *db_addr;
145 u8 __iomem *header_addr;
147 enum queue_direction direction;
148 enum ena_admin_placement_policy_type mem_queue_type;
150 bool disable_meta_caching;
153 struct ena_com_tx_meta cached_tx_meta;
154 struct ena_com_llq_info llq_info;
155 struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
156 struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
164 u16 llq_last_copy_tail;
165 u32 tx_max_header_size;
169 u16 entries_in_tx_burst_left;
170 } ____cacheline_aligned;
172 struct ena_com_admin_cq {
173 struct ena_admin_acq_entry *entries;
174 ena_mem_handle_t mem_handle;
181 struct ena_com_admin_sq {
182 struct ena_admin_aq_entry *entries;
183 ena_mem_handle_t mem_handle;
186 u32 __iomem *db_addr;
194 struct ena_com_stats_admin {
202 struct ena_com_admin_queue {
205 struct ena_com_dev *ena_dev;
206 ena_spinlock_t q_lock; /* spinlock for the admin queue */
208 struct ena_comp_ctx *comp_ctx;
209 u32 completion_timeout;
211 struct ena_com_admin_cq cq;
212 struct ena_com_admin_sq sq;
214 /* Indicate if the admin queue should poll for completion */
217 /* Define if fallback to polling mode should occur */
222 /* Indicate that the ena was initialized and can
223 * process new admin commands
227 /* Count the number of outstanding admin commands */
228 ena_atomic32_t outstanding_cmds;
230 struct ena_com_stats_admin stats;
233 struct ena_aenq_handlers;
235 struct ena_com_aenq {
238 struct ena_admin_aenq_entry *entries;
240 ena_mem_handle_t mem_handle;
242 struct ena_aenq_handlers *aenq_handlers;
245 struct ena_com_mmio_read {
246 struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
247 dma_addr_t read_resp_dma_addr;
248 ena_mem_handle_t read_resp_mem_handle;
249 u32 reg_read_to; /* in us */
251 bool readless_supported;
252 /* spin lock to ensure a single outstanding read */
258 u16 *host_rss_ind_tbl;
259 struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
260 dma_addr_t rss_ind_tbl_dma_addr;
261 ena_mem_handle_t rss_ind_tbl_mem_handle;
265 enum ena_admin_hash_functions hash_func;
266 struct ena_admin_feature_rss_flow_hash_control *hash_key;
267 dma_addr_t hash_key_dma_addr;
268 ena_mem_handle_t hash_key_mem_handle;
272 struct ena_admin_feature_rss_hash_control *hash_ctrl;
273 dma_addr_t hash_ctrl_dma_addr;
274 ena_mem_handle_t hash_ctrl_mem_handle;
278 struct ena_host_attribute {
280 u8 *debug_area_virt_addr;
281 dma_addr_t debug_area_dma_addr;
282 ena_mem_handle_t debug_area_dma_handle;
285 /* Host information */
286 struct ena_admin_host_info *host_info;
287 dma_addr_t host_info_dma_addr;
288 ena_mem_handle_t host_info_dma_handle;
291 /* Each ena_dev is a PCI function. */
293 struct ena_com_admin_queue admin_queue;
294 struct ena_com_aenq aenq;
295 struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
296 struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
298 void __iomem *mem_bar;
302 enum ena_admin_placement_policy_type tx_mem_queue_type;
303 u32 tx_max_header_size;
304 u16 stats_func; /* Selected function for extended statistic dump */
305 u16 stats_queue; /* Selected queue for extended statistic dump */
307 struct ena_com_mmio_read mmio_read;
310 u32 supported_features;
313 struct ena_host_attribute host_attr;
314 bool adaptive_coalescing;
315 u16 intr_delay_resolution;
317 /* interrupt moderation intervals are in usec divided by
318 * intr_delay_resolution, which is supplied by the device.
320 u32 intr_moder_tx_interval;
321 u32 intr_moder_rx_interval;
323 struct ena_intr_moder_entry *intr_moder_tbl;
325 struct ena_com_llq_info llq_info;
327 u32 ena_min_poll_delay_us;
330 struct ena_com_dev_get_features_ctx {
331 struct ena_admin_queue_feature_desc max_queues;
332 struct ena_admin_queue_ext_feature_desc max_queue_ext;
333 struct ena_admin_device_attr_feature_desc dev_attr;
334 struct ena_admin_feature_aenq_desc aenq;
335 struct ena_admin_feature_offload_desc offload;
336 struct ena_admin_ena_hw_hints hw_hints;
337 struct ena_admin_feature_llq_desc llq;
338 struct ena_admin_feature_rss_ind_table ind_table;
341 struct ena_com_create_io_ctx {
342 enum ena_admin_placement_policy_type mem_queue_type;
343 enum queue_direction direction;
350 typedef void (*ena_aenq_handler)(void *data,
351 struct ena_admin_aenq_entry *aenq_e);
353 /* Holds aenq handlers. Indexed by AENQ event group */
354 struct ena_aenq_handlers {
355 ena_aenq_handler handlers[ENA_MAX_HANDLERS];
356 ena_aenq_handler unimplemented_handler;
359 /*****************************************************************************/
360 /*****************************************************************************/
361 #if defined(__cplusplus)
365 /* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
366 * @ena_dev: ENA communication layer struct
368 * Initialize the register read mechanism.
370 * @note: This method must be the first stage in the initialization sequence.
372 * @return - 0 on success, negative value on failure.
374 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
376 /* ena_com_set_mmio_read_mode - Enable/disable the indirect mmio reg read mechanism
377 * @ena_dev: ENA communication layer struct
378 * @readless_supported: readless mode (enable/disable)
380 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
381 bool readless_supported);
383 /* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
384 * value physical address.
385 * @ena_dev: ENA communication layer struct
387 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
389 /* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
390 * @ena_dev: ENA communication layer struct
392 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
394 /* ena_com_admin_init - Init the admin and the async queues
395 * @ena_dev: ENA communication layer struct
396 * @aenq_handlers: Those handlers to be called upon event.
398 * Initialize the admin submission and completion queues.
399 * Initialize the asynchronous events notification queues.
401 * @return - 0 on success, negative value on failure.
403 int ena_com_admin_init(struct ena_com_dev *ena_dev,
404 struct ena_aenq_handlers *aenq_handlers);
406 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
407 * @ena_dev: ENA communication layer struct
409 * @note: Before calling this method, the caller must validate that the device
410 * won't send any additional admin completions/aenq.
411 * To achieve that, a FLR is recommended.
413 void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
415 /* ena_com_dev_reset - Perform device FLR to the device.
416 * @ena_dev: ENA communication layer struct
417 * @reset_reason: Specify what is the trigger for the reset in case of an error.
419 * @return - 0 on success, negative value on failure.
421 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
422 enum ena_regs_reset_reason_types reset_reason);
424 /* ena_com_create_io_queue - Create io queue.
425 * @ena_dev: ENA communication layer struct
426 * @ctx - create context structure
428 * Create the submission and the completion queues.
430 * @return - 0 on success, negative value on failure.
432 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
433 struct ena_com_create_io_ctx *ctx);
435 /* ena_com_destroy_io_queue - Destroy IO queue with the queue id - qid.
436 * @ena_dev: ENA communication layer struct
437 * @qid - the caller virtual queue id.
439 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
441 /* ena_com_get_io_handlers - Return the io queue handlers
442 * @ena_dev: ENA communication layer struct
443 * @qid - the caller virtual queue id.
444 * @io_sq - IO submission queue handler
445 * @io_cq - IO completion queue handler.
447 * @return - 0 on success, negative value on failure.
449 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
450 struct ena_com_io_sq **io_sq,
451 struct ena_com_io_cq **io_cq);
453 /* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
454 * @ena_dev: ENA communication layer struct
456 * After this method, aenq event can be received via AENQ.
458 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
460 /* ena_com_set_admin_running_state - Set the state of the admin queue
461 * @ena_dev: ENA communication layer struct
463 * Change the state of the admin queue (enable/disable)
465 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
467 /* ena_com_get_admin_running_state - Get the admin queue state
468 * @ena_dev: ENA communication layer struct
470 * Retrieve the state of the admin queue (enable/disable)
472 * @return - current polling mode (enable/disable)
474 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
476 /* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
477 * @ena_dev: ENA communication layer struct
478 * @polling: ENAble/Disable polling mode
480 * Set the admin completion mode.
482 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
484 /* ena_com_get_admin_polling_mode - Get the admin completion queue polling mode
485 * @ena_dev: ENA communication layer struct
487 * Get the admin completion mode.
488 * If polling mode is on, ena_com_execute_admin_command will perform a
489 * polling on the admin completion queue for the commands completion,
490 * otherwise it will wait on wait event.
494 bool ena_com_get_admin_polling_mode(struct ena_com_dev *ena_dev);
496 /* ena_com_set_admin_auto_polling_mode - Enable autoswitch to polling mode
497 * @ena_dev: ENA communication layer struct
498 * @polling: Enable/Disable polling mode
500 * Set the autopolling mode.
501 * If autopolling is on:
502 * In case of missing interrupt when data is available switch to polling.
504 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
507 /* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
508 * @ena_dev: ENA communication layer struct
510 * This method goes over the admin completion queue and wakes up all the pending
511 * threads that wait on the commands wait event.
513 * @note: Should be called after MSI-X interrupt.
515 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
517 /* ena_com_aenq_intr_handler - AENQ interrupt handler
518 * @ena_dev: ENA communication layer struct
520 * This method goes over the async event notification queue and calls the proper
523 void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data);
525 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
526 * @ena_dev: ENA communication layer struct
528 * This method aborts all the outstanding admin commands.
529 * The caller should then call ena_com_wait_for_abort_completion to make sure
530 * all the commands were completed.
532 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
534 /* ena_com_wait_for_abort_completion - Wait for admin commands abort.
535 * @ena_dev: ENA communication layer struct
537 * This method waits until all the outstanding admin commands are completed.
539 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
541 /* ena_com_validate_version - Validate the device parameters
542 * @ena_dev: ENA communication layer struct
544 * This method verifies the device parameters are the same as the saved
545 * parameters in ena_dev.
546 * This method is useful after device reset, to validate the device mac address
547 * and the device offloads are the same as before the reset.
549 * @return - 0 on success negative value otherwise.
551 int ena_com_validate_version(struct ena_com_dev *ena_dev);
553 /* ena_com_get_link_params - Retrieve physical link parameters.
554 * @ena_dev: ENA communication layer struct
555 * @resp: Link parameters
557 * Retrieve the physical link parameters,
558 * like speed, auto-negotiation and full duplex support.
560 * @return - 0 on Success negative value otherwise.
562 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
563 struct ena_admin_get_feat_resp *resp);
565 /* ena_com_get_dma_width - Retrieve physical dma address width the device
567 * @ena_dev: ENA communication layer struct
569 * Retrieve the maximum physical address bits the device can handle.
571 * @return: > 0 on Success and negative value otherwise.
573 int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
575 /* ena_com_set_aenq_config - Set aenq groups configurations
576 * @ena_dev: ENA communication layer struct
577 * @groups flag: bit fields flags of enum ena_admin_aenq_group.
579 * Configure which aenq event group the driver would like to receive.
581 * @return: 0 on Success and negative value otherwise.
583 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
585 /* ena_com_get_dev_attr_feat - Get device features
586 * @ena_dev: ENA communication layer struct
587 * @get_feat_ctx: returned context that contain the get features.
589 * @return: 0 on Success and negative value otherwise.
591 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
592 struct ena_com_dev_get_features_ctx *get_feat_ctx);
594 /* ena_com_get_dev_basic_stats - Get device basic statistics
595 * @ena_dev: ENA communication layer struct
596 * @stats: stats return value
598 * @return: 0 on Success and negative value otherwise.
600 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
601 struct ena_admin_basic_stats *stats);
603 /* ena_com_get_eni_stats - Get extended network interface statistics
604 * @ena_dev: ENA communication layer struct
605 * @stats: stats return value
607 * @return: 0 on Success and negative value otherwise.
609 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
610 struct ena_admin_eni_stats *stats);
612 /* ena_com_set_dev_mtu - Configure the device mtu.
613 * @ena_dev: ENA communication layer struct
616 * @return: 0 on Success and negative value otherwise.
618 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu);
620 /* ena_com_get_offload_settings - Retrieve the device offloads capabilities
621 * @ena_dev: ENA communication layer struct
622 * @offlad: offload return value
624 * @return: 0 on Success and negative value otherwise.
626 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
627 struct ena_admin_feature_offload_desc *offload);
629 /* ena_com_rss_init - Init RSS
630 * @ena_dev: ENA communication layer struct
631 * @log_size: indirection log size
633 * Allocate RSS/RFS resources.
634 * The caller then can configure rss using ena_com_set_hash_function,
635 * ena_com_set_hash_ctrl and ena_com_indirect_table_set.
637 * @return: 0 on Success and negative value otherwise.
639 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
641 /* ena_com_rss_destroy - Destroy rss
642 * @ena_dev: ENA communication layer struct
644 * Free all the RSS/RFS resources.
646 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
648 /* ena_com_get_current_hash_function - Get RSS hash function
649 * @ena_dev: ENA communication layer struct
651 * Return the current hash function.
652 * @return: 0 or one of the ena_admin_hash_functions values.
654 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);
656 /* ena_com_fill_hash_function - Fill RSS hash function
657 * @ena_dev: ENA communication layer struct
658 * @func: The hash function (Toeplitz or crc)
659 * @key: Hash key (for toeplitz hash)
660 * @key_len: key length (max length 10 DW)
661 * @init_val: initial value for the hash function
663 * Fill the ena_dev resources with the desire hash function, hash key, key_len
664 * and key initial value (if needed by the hash function).
665 * To flush the key into the device the caller should call
666 * ena_com_set_hash_function.
668 * @return: 0 on Success and negative value otherwise.
670 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
671 enum ena_admin_hash_functions func,
672 const u8 *key, u16 key_len, u32 init_val);
674 /* ena_com_set_hash_function - Flush the hash function and it dependencies to
676 * @ena_dev: ENA communication layer struct
678 * Flush the hash function and it dependencies (key, key length and
679 * initial value) if needed.
681 * @note: Prior to this method the caller should call ena_com_fill_hash_function
683 * @return: 0 on Success and negative value otherwise.
685 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
687 /* ena_com_get_hash_function - Retrieve the hash function from the device.
688 * @ena_dev: ENA communication layer struct
689 * @func: hash function
691 * Retrieve the hash function from the device.
693 * @note: If the caller called ena_com_fill_hash_function but didn't flush
694 * it to the device, the new configuration will be lost.
696 * @return: 0 on Success and negative value otherwise.
698 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
699 enum ena_admin_hash_functions *func);
701 /* ena_com_get_hash_key - Retrieve the hash key
702 * @ena_dev: ENA communication layer struct
705 * Retrieve the hash key.
707 * @note: If the caller called ena_com_fill_hash_key but didn't flush
708 * it to the device, the new configuration will be lost.
710 * @return: 0 on Success and negative value otherwise.
712 int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
713 /* ena_com_fill_hash_ctrl - Fill RSS hash control
714 * @ena_dev: ENA communication layer struct.
715 * @proto: The protocol to configure.
716 * @hash_fields: bit mask of ena_admin_flow_hash_fields
718 * Fill the ena_dev resources with the desire hash control (the ethernet
719 * fields that take part of the hash) for a specific protocol.
720 * To flush the hash control to the device, the caller should call
721 * ena_com_set_hash_ctrl.
723 * @return: 0 on Success and negative value otherwise.
725 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
726 enum ena_admin_flow_hash_proto proto,
729 /* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
730 * @ena_dev: ENA communication layer struct
732 * Flush the hash control (the ethernet fields that take part of the hash)
734 * @note: Prior to this method the caller should call ena_com_fill_hash_ctrl.
736 * @return: 0 on Success and negative value otherwise.
738 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
740 /* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
741 * @ena_dev: ENA communication layer struct
742 * @proto: The protocol to retrieve.
743 * @fields: bit mask of ena_admin_flow_hash_fields.
745 * Retrieve the hash control from the device.
747 * @note: If the caller called ena_com_fill_hash_ctrl but didn't flush
748 * it to the device, the new configuration will be lost.
750 * @return: 0 on Success and negative value otherwise.
752 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
753 enum ena_admin_flow_hash_proto proto,
756 /* ena_com_set_default_hash_ctrl - Set the hash control to a default
758 * @ena_dev: ENA communication layer struct
760 * Fill the ena_dev resources with the default hash control configuration.
761 * To flush the hash control to the device, the caller should call
762 * ena_com_set_hash_ctrl.
764 * @return: 0 on Success and negative value otherwise.
766 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
768 /* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
770 * @ena_dev: ENA communication layer struct.
771 * @entry_idx - indirection table entry.
772 * @entry_value - redirection value
774 * Fill a single entry of the RSS indirection table in the ena_dev resources.
775 * To flush the indirection table to the device, the called should call
776 * ena_com_indirect_table_set.
778 * @return: 0 on Success and negative value otherwise.
780 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
781 u16 entry_idx, u16 entry_value);
783 /* ena_com_indirect_table_set - Flush the indirection table to the device.
784 * @ena_dev: ENA communication layer struct
786 * Flush the indirection hash control to the device.
787 * Prior to this method the caller should call ena_com_indirect_table_fill_entry
789 * @return: 0 on Success and negative value otherwise.
791 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
793 /* ena_com_indirect_table_get - Retrieve the indirection table from the device.
794 * @ena_dev: ENA communication layer struct
795 * @ind_tbl: indirection table
797 * Retrieve the RSS indirection table from the device.
799 * @note: If the caller called ena_com_indirect_table_fill_entry but didn't flush
800 * it to the device, the new configuration will be lost.
802 * @return: 0 on Success and negative value otherwise.
804 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
806 /* ena_com_allocate_host_info - Allocate host info resources.
807 * @ena_dev: ENA communication layer struct
809 * @return: 0 on Success and negative value otherwise.
811 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
813 /* ena_com_allocate_debug_area - Allocate debug area.
814 * @ena_dev: ENA communication layer struct
815 * @debug_area_size - debug area size.
817 * @return: 0 on Success and negative value otherwise.
819 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
820 u32 debug_area_size);
822 /* ena_com_delete_debug_area - Free the debug area resources.
823 * @ena_dev: ENA communication layer struct
825 * Free the allocated debug area.
827 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
829 /* ena_com_delete_host_info - Free the host info resources.
830 * @ena_dev: ENA communication layer struct
832 * Free the allocated host info.
834 void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
836 /* ena_com_set_host_attributes - Update the device with the host
837 * attributes (debug area and host info) base address.
838 * @ena_dev: ENA communication layer struct
840 * @return: 0 on Success and negative value otherwise.
842 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
844 /* ena_com_create_io_cq - Create io completion queue.
845 * @ena_dev: ENA communication layer struct
846 * @io_cq - io completion queue handler
848 * Create IO completion queue.
850 * @return - 0 on success, negative value on failure.
852 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
853 struct ena_com_io_cq *io_cq);
855 /* ena_com_destroy_io_cq - Destroy io completion queue.
856 * @ena_dev: ENA communication layer struct
857 * @io_cq - io completion queue handler
859 * Destroy IO completion queue.
861 * @return - 0 on success, negative value on failure.
863 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
864 struct ena_com_io_cq *io_cq);
866 /* ena_com_execute_admin_command - Execute admin command
867 * @admin_queue: admin queue.
868 * @cmd: the admin command to execute.
869 * @cmd_size: the command size.
870 * @cmd_completion: command completion return value.
871 * @cmd_comp_size: command completion size.
873 * Submit an admin command and then wait until the device returns a
875 * The completion will be copied into cmd_comp.
877 * @return - 0 on success, negative value on failure.
879 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
880 struct ena_admin_aq_entry *cmd,
882 struct ena_admin_acq_entry *cmd_comp,
883 size_t cmd_comp_size);
885 /* ena_com_init_interrupt_moderation - Init interrupt moderation
886 * @ena_dev: ENA communication layer struct
888 * @return - 0 on success, negative value on failure.
890 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
892 /* ena_com_interrupt_moderation_supported - Return if interrupt moderation
893 * capability is supported by the device.
895 * @return - supported or not.
897 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
899 /* ena_com_update_nonadaptive_moderation_interval_tx - Update the
900 * non-adaptive interval in Tx direction.
901 * @ena_dev: ENA communication layer struct
902 * @tx_coalesce_usecs: Interval in usec.
904 * @return - 0 on success, negative value on failure.
906 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
907 u32 tx_coalesce_usecs);
909 /* ena_com_update_nonadaptive_moderation_interval_rx - Update the
910 * non-adaptive interval in Rx direction.
911 * @ena_dev: ENA communication layer struct
912 * @rx_coalesce_usecs: Interval in usec.
914 * @return - 0 on success, negative value on failure.
916 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
917 u32 rx_coalesce_usecs);
919 /* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
920 * non-adaptive interval in Tx direction.
921 * @ena_dev: ENA communication layer struct
923 * @return - interval in usec
925 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
927 /* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
928 * non-adaptive interval in Rx direction.
929 * @ena_dev: ENA communication layer struct
931 * @return - interval in usec
933 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
935 /* ena_com_config_dev_mode - Configure the placement policy of the device.
936 * @ena_dev: ENA communication layer struct
937 * @llq_features: LLQ feature descriptor, retrieve via
938 * ena_com_get_dev_attr_feat.
939 * @ena_llq_config: The default driver LLQ parameters configurations
941 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
942 struct ena_admin_feature_llq_desc *llq_features,
943 struct ena_llq_configurations *llq_default_config);
945 static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
947 return ena_dev->adaptive_coalescing;
950 static inline void ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
952 ena_dev->adaptive_coalescing = true;
955 static inline void ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
957 ena_dev->adaptive_coalescing = false;
960 /* ena_com_update_intr_reg - Prepare interrupt register
961 * @intr_reg: interrupt register to update.
962 * @rx_delay_interval: Rx interval in usecs
963 * @tx_delay_interval: Tx interval in usecs
964 * @unmask: unmask enable/disable
966 * Prepare interrupt update register with the supplied parameters.
968 static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
969 u32 rx_delay_interval,
970 u32 tx_delay_interval,
973 intr_reg->intr_control = 0;
974 intr_reg->intr_control |= rx_delay_interval &
975 ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
977 intr_reg->intr_control |=
978 (tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
979 & ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK;
982 intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
985 static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
987 u16 size, buffers_num;
990 size = bounce_buf_ctrl->buffer_size;
991 buffers_num = bounce_buf_ctrl->buffers_num;
993 buf = bounce_buf_ctrl->base_buffer +
994 (bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
996 prefetchw(bounce_buf_ctrl->base_buffer +
997 (bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
1002 #if defined(__cplusplus)
1004 #endif /* __cplusplus */
1005 #endif /* !(ENA_COM) */