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38 #include "ena_common_defs.h"
39 #include "ena_admin_defs.h"
40 #include "ena_eth_io_defs.h"
41 #include "ena_regs_defs.h"
42 #if defined(__linux__) && !defined(__KERNEL__)
43 #include <rte_lcore.h>
44 #include <rte_spinlock.h>
48 #define ENA_MAX_NUM_IO_QUEUES 128U
49 /* We need to queues for each IO (on for Tx and one for Rx) */
50 #define ENA_TOTAL_NUM_QUEUES (2 * (ENA_MAX_NUM_IO_QUEUES))
52 #define ENA_MAX_HANDLERS 256
54 #define ENA_MAX_PHYS_ADDR_SIZE_BITS 48
57 #define ENA_REG_READ_TIMEOUT 200000
59 #define ADMIN_SQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aq_entry))
60 #define ADMIN_CQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_acq_entry))
61 #define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aenq_entry))
63 /*****************************************************************************/
64 /*****************************************************************************/
65 /* ENA adaptive interrupt moderation settings */
67 #define ENA_INTR_LOWEST_USECS (0)
68 #define ENA_INTR_LOWEST_PKTS (3)
69 #define ENA_INTR_LOWEST_BYTES (2 * 1524)
71 #define ENA_INTR_LOW_USECS (32)
72 #define ENA_INTR_LOW_PKTS (12)
73 #define ENA_INTR_LOW_BYTES (16 * 1024)
75 #define ENA_INTR_MID_USECS (80)
76 #define ENA_INTR_MID_PKTS (48)
77 #define ENA_INTR_MID_BYTES (64 * 1024)
79 #define ENA_INTR_HIGH_USECS (128)
80 #define ENA_INTR_HIGH_PKTS (96)
81 #define ENA_INTR_HIGH_BYTES (128 * 1024)
83 #define ENA_INTR_HIGHEST_USECS (192)
84 #define ENA_INTR_HIGHEST_PKTS (128)
85 #define ENA_INTR_HIGHEST_BYTES (192 * 1024)
87 #define ENA_INTR_INITIAL_TX_INTERVAL_USECS 196
88 #define ENA_INTR_INITIAL_RX_INTERVAL_USECS 4
89 #define ENA_INTR_DELAY_OLD_VALUE_WEIGHT 6
90 #define ENA_INTR_DELAY_NEW_VALUE_WEIGHT 4
92 enum ena_intr_moder_level {
93 ENA_INTR_MODER_LOWEST = 0,
97 ENA_INTR_MODER_HIGHEST,
98 ENA_INTR_MAX_NUM_OF_LEVELS,
101 struct ena_intr_moder_entry {
102 unsigned int intr_moder_interval;
103 unsigned int pkts_per_interval;
104 unsigned int bytes_per_interval;
107 enum queue_direction {
108 ENA_COM_IO_QUEUE_DIRECTION_TX,
109 ENA_COM_IO_QUEUE_DIRECTION_RX
113 dma_addr_t paddr; /**< Buffer physical address */
114 u16 len; /**< Buffer length in bytes */
117 struct ena_com_rx_buf_info {
122 struct ena_com_io_desc_addr {
123 u8 __iomem *pbuf_dev_addr; /* LLQ address */
125 dma_addr_t phys_addr;
126 ena_mem_handle_t mem_handle;
129 struct ena_com_tx_meta {
133 u16 l3_outer_hdr_len; /* In words */
134 u16 l3_outer_hdr_offset;
135 u16 l4_hdr_len; /* In words */
138 struct ena_com_io_cq {
139 struct ena_com_io_desc_addr cdesc_addr;
141 /* Interrupt unmask register */
142 u32 __iomem *unmask_reg;
144 /* The completion queue head doorbell register */
145 u32 __iomem *cq_head_db_reg;
147 /* numa configuration register (for TPH) */
148 u32 __iomem *numa_node_cfg_reg;
150 /* The value to write to the above register to unmask
151 * the interrupt of this queue
155 enum queue_direction direction;
157 /* holds the number of cdesc of the current packet */
158 u16 cur_rx_pkt_cdesc_count;
159 /* save the firt cdesc idx of the current packet */
160 u16 cur_rx_pkt_cdesc_start_idx;
166 /* Device queue index */
169 u16 last_head_update;
171 u8 cdesc_entry_size_in_bytes;
173 } ____cacheline_aligned;
175 struct ena_com_io_sq {
176 struct ena_com_io_desc_addr desc_addr;
178 u32 __iomem *db_addr;
179 u8 __iomem *header_addr;
181 enum queue_direction direction;
182 enum ena_admin_placement_policy_type mem_queue_type;
185 struct ena_com_tx_meta cached_tx_meta;
193 u32 tx_max_header_size;
197 } ____cacheline_aligned;
199 struct ena_com_admin_cq {
200 struct ena_admin_acq_entry *entries;
201 ena_mem_handle_t mem_handle;
208 struct ena_com_admin_sq {
209 struct ena_admin_aq_entry *entries;
210 ena_mem_handle_t mem_handle;
213 u32 __iomem *db_addr;
221 struct ena_com_stats_admin {
229 struct ena_com_admin_queue {
231 ena_spinlock_t q_lock; /* spinlock for the admin queue */
232 struct ena_comp_ctx *comp_ctx;
234 struct ena_com_admin_cq cq;
235 struct ena_com_admin_sq sq;
237 /* Indicate if the admin queue should poll for completion */
242 /* Indicate that the ena was initialized and can
243 * process new admin commands
247 /* Count the number of outstanding admin commands */
248 ena_atomic32_t outstanding_cmds;
250 struct ena_com_stats_admin stats;
253 struct ena_aenq_handlers;
255 struct ena_com_aenq {
258 struct ena_admin_aenq_entry *entries;
260 ena_mem_handle_t mem_handle;
262 struct ena_aenq_handlers *aenq_handlers;
265 struct ena_com_mmio_read {
266 struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
267 dma_addr_t read_resp_dma_addr;
268 ena_mem_handle_t read_resp_mem_handle;
270 bool readless_supported;
271 /* spin lock to ensure a single outstanding read */
277 u16 *host_rss_ind_tbl;
278 struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
279 dma_addr_t rss_ind_tbl_dma_addr;
280 ena_mem_handle_t rss_ind_tbl_mem_handle;
284 enum ena_admin_hash_functions hash_func;
285 struct ena_admin_feature_rss_flow_hash_control *hash_key;
286 dma_addr_t hash_key_dma_addr;
287 ena_mem_handle_t hash_key_mem_handle;
291 struct ena_admin_feature_rss_hash_control *hash_ctrl;
292 dma_addr_t hash_ctrl_dma_addr;
293 ena_mem_handle_t hash_ctrl_mem_handle;
297 struct ena_host_attribute {
299 u8 *debug_area_virt_addr;
300 dma_addr_t debug_area_dma_addr;
301 ena_mem_handle_t debug_area_dma_handle;
304 /* Host information */
305 struct ena_admin_host_info *host_info;
306 dma_addr_t host_info_dma_addr;
307 ena_mem_handle_t host_info_dma_handle;
310 /* Each ena_dev is a PCI function. */
312 struct ena_com_admin_queue admin_queue;
313 struct ena_com_aenq aenq;
314 struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
315 struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
317 void __iomem *mem_bar;
320 enum ena_admin_placement_policy_type tx_mem_queue_type;
321 u32 tx_max_header_size;
322 u16 stats_func; /* Selected function for extended statistic dump */
323 u16 stats_queue; /* Selected queue for extended statistic dump */
325 struct ena_com_mmio_read mmio_read;
328 u32 supported_features;
331 struct ena_host_attribute host_attr;
332 bool adaptive_coalescing;
333 u16 intr_delay_resolution;
334 u32 intr_moder_tx_interval;
335 struct ena_intr_moder_entry *intr_moder_tbl;
338 struct ena_com_dev_get_features_ctx {
339 struct ena_admin_queue_feature_desc max_queues;
340 struct ena_admin_device_attr_feature_desc dev_attr;
341 struct ena_admin_feature_aenq_desc aenq;
342 struct ena_admin_feature_offload_desc offload;
345 struct ena_com_create_io_ctx {
346 enum ena_admin_placement_policy_type mem_queue_type;
347 enum queue_direction direction;
354 typedef void (*ena_aenq_handler)(void *data,
355 struct ena_admin_aenq_entry *aenq_e);
357 /* Holds aenq handlers. Indexed by AENQ event group */
358 struct ena_aenq_handlers {
359 ena_aenq_handler handlers[ENA_MAX_HANDLERS];
360 ena_aenq_handler unimplemented_handler;
363 /*****************************************************************************/
364 /*****************************************************************************/
365 #if defined(__cplusplus)
369 /* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
370 * @ena_dev: ENA communication layer struct
372 * Initialize the register read mechanism.
374 * @note: This method must be the first stage in the initialization sequence.
376 * @return - 0 on success, negative value on failure.
378 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
380 /* ena_com_set_mmio_read_mode - Enable/disable the mmio reg read mechanism
381 * @ena_dev: ENA communication layer struct
382 * @realess_supported: readless mode (enable/disable)
384 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
385 bool readless_supported);
387 /* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
388 * value physical address.
389 * @ena_dev: ENA communication layer struct
391 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
393 /* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
394 * @ena_dev: ENA communication layer struct
396 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
398 /* ena_com_admin_init - Init the admin and the async queues
399 * @ena_dev: ENA communication layer struct
400 * @aenq_handlers: Those handlers to be called upon event.
401 * @init_spinlock: Indicate if this method should init the admin spinlock or
402 * the spinlock was init before (for example, in a case of FLR).
404 * Initialize the admin submission and completion queues.
405 * Initialize the asynchronous events notification queues.
407 * @return - 0 on success, negative value on failure.
409 int ena_com_admin_init(struct ena_com_dev *ena_dev,
410 struct ena_aenq_handlers *aenq_handlers,
413 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
414 * @ena_dev: ENA communication layer struct
416 * @note: Before calling this method, the caller must validate that the device
417 * won't send any additional admin completions/aenq.
418 * To achieve that, a FLR is recommended.
420 void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
422 /* ena_com_dev_reset - Perform device FLR to the device.
423 * @ena_dev: ENA communication layer struct
425 * @return - 0 on success, negative value on failure.
427 int ena_com_dev_reset(struct ena_com_dev *ena_dev);
429 /* ena_com_create_io_queue - Create io queue.
430 * @ena_dev: ENA communication layer struct
431 * ena_com_create_io_ctx - create context structure
433 * Create the submission and the completion queues.
435 * @return - 0 on success, negative value on failure.
437 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
438 struct ena_com_create_io_ctx *ctx);
440 /* ena_com_admin_destroy - Destroy IO queue with the queue id - qid.
441 * @ena_dev: ENA communication layer struct
443 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
445 /* ena_com_get_io_handlers - Return the io queue handlers
446 * @ena_dev: ENA communication layer struct
447 * @qid - the caller virtual queue id.
448 * @io_sq - IO submission queue handler
449 * @io_cq - IO completion queue handler.
451 * @return - 0 on success, negative value on failure.
453 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
454 struct ena_com_io_sq **io_sq,
455 struct ena_com_io_cq **io_cq);
457 /* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
458 * @ena_dev: ENA communication layer struct
460 * After this method, aenq event can be received via AENQ.
462 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
464 /* ena_com_set_admin_running_state - Set the state of the admin queue
465 * @ena_dev: ENA communication layer struct
467 * Change the state of the admin queue (enable/disable)
469 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
471 /* ena_com_get_admin_running_state - Get the admin queue state
472 * @ena_dev: ENA communication layer struct
474 * Retrieve the state of the admin queue (enable/disable)
476 * @return - current polling mode (enable/disable)
478 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
480 /* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
481 * @ena_dev: ENA communication layer struct
482 * @polling: ENAble/Disable polling mode
484 * Set the admin completion mode.
486 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
488 /* ena_com_set_admin_polling_mode - Get the admin completion queue polling mode
489 * @ena_dev: ENA communication layer struct
491 * Get the admin completion mode.
492 * If polling mode is on, ena_com_execute_admin_command will perform a
493 * polling on the admin completion queue for the commands completion,
494 * otherwise it will wait on wait event.
498 bool ena_com_get_ena_admin_polling_mode(struct ena_com_dev *ena_dev);
500 /* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
501 * @ena_dev: ENA communication layer struct
503 * This method go over the admin completion queue and wake up all the pending
504 * threads that wait on the commands wait event.
506 * @note: Should be called after MSI-X interrupt.
508 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
510 /* ena_com_aenq_intr_handler - AENQ interrupt handler
511 * @ena_dev: ENA communication layer struct
513 * This method go over the async event notification queue and call the proper
516 void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data);
518 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
519 * @ena_dev: ENA communication layer struct
521 * This method aborts all the outstanding admin commands.
522 * The caller should then call ena_com_wait_for_abort_completion to make sure
523 * all the commands were completed.
525 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
527 /* ena_com_wait_for_abort_completion - Wait for admin commands abort.
528 * @ena_dev: ENA communication layer struct
530 * This method wait until all the outstanding admin commands will be completed.
532 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
534 /* ena_com_validate_version - Validate the device parameters
535 * @ena_dev: ENA communication layer struct
537 * This method validate the device parameters are the same as the saved
538 * parameters in ena_dev.
539 * This method is useful after device reset, to validate the device mac address
540 * and the device offloads are the same as before the reset.
542 * @return - 0 on success negative value otherwise.
544 int ena_com_validate_version(struct ena_com_dev *ena_dev);
546 /* ena_com_get_link_params - Retrieve physical link parameters.
547 * @ena_dev: ENA communication layer struct
548 * @resp: Link parameters
550 * Retrieve the physical link parameters,
551 * like speed, auto-negotiation and full duplex support.
553 * @return - 0 on Success negative value otherwise.
555 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
556 struct ena_admin_get_feat_resp *resp);
558 /* ena_com_get_dma_width - Retrieve physical dma address width the device
560 * @ena_dev: ENA communication layer struct
562 * Retrieve the maximum physical address bits the device can handle.
564 * @return: > 0 on Success and negative value otherwise.
566 int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
568 /* ena_com_set_aenq_config - Set aenq groups configurations
569 * @ena_dev: ENA communication layer struct
570 * @groups flag: bit fields flags of enum ena_admin_aenq_group.
572 * Configure which aenq event group the driver would like to receive.
574 * @return: 0 on Success and negative value otherwise.
576 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
578 /* ena_com_get_dev_attr_feat - Get device features
579 * @ena_dev: ENA communication layer struct
580 * @get_feat_ctx: returned context that contain the get features.
582 * @return: 0 on Success and negative value otherwise.
585 ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
586 struct ena_com_dev_get_features_ctx *get_feat_ctx);
588 /* ena_com_get_dev_basic_stats - Get device basic statistics
589 * @ena_dev: ENA communication layer struct
590 * @stats: stats return value
592 * @return: 0 on Success and negative value otherwise.
594 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
595 struct ena_admin_basic_stats *stats);
597 /* ena_com_set_dev_mtu - Configure the device mtu.
598 * @ena_dev: ENA communication layer struct
601 * @return: 0 on Success and negative value otherwise.
603 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu);
605 /* ena_com_get_offload_settings - Retrieve the device offloads capabilities
606 * @ena_dev: ENA communication layer struct
607 * @offlad: offload return value
609 * @return: 0 on Success and negative value otherwise.
612 ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
613 struct ena_admin_feature_offload_desc *offload);
615 /* ena_com_rss_init - Init RSS
616 * @ena_dev: ENA communication layer struct
617 * @log_size: indirection log size
619 * Allocate RSS/RFS resources.
620 * The caller then can configure rss using ena_com_set_hash_function,
621 * ena_com_set_hash_ctrl and ena_com_indirect_table_set.
623 * @return: 0 on Success and negative value otherwise.
625 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
627 /* ena_com_rss_destroy - Destroy rss
628 * @ena_dev: ENA communication layer struct
630 * Free all the RSS/RFS resources.
632 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
634 /* ena_com_fill_hash_function - Fill RSS hash function
635 * @ena_dev: ENA communication layer struct
636 * @func: The hash function (Toeplitz or crc)
637 * @key: Hash key (for toeplitz hash)
638 * @key_len: key length (max length 10 DW)
639 * @init_val: initial value for the hash function
641 * Fill the ena_dev resources with the desire hash function, hash key, key_len
642 * and key initial value (if needed by the hash function).
643 * To flush the key into the device the caller should call
644 * ena_com_set_hash_function.
646 * @return: 0 on Success and negative value otherwise.
648 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
649 enum ena_admin_hash_functions func,
650 const u8 *key, u16 key_len, u32 init_val);
652 /* ena_com_set_hash_function - Flush the hash function and it dependencies to
654 * @ena_dev: ENA communication layer struct
656 * Flush the hash function and it dependencies (key, key length and
657 * initial value) if needed.
659 * @note: Prior to this method the caller should call ena_com_fill_hash_function
661 * @return: 0 on Success and negative value otherwise.
663 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
665 /* ena_com_get_hash_function - Retrieve the hash function and the hash key
667 * @ena_dev: ENA communication layer struct
668 * @func: hash function
671 * Retrieve the hash function and the hash key from the device.
673 * @note: If the caller called ena_com_fill_hash_function but didn't flash
674 * it to the device, the new configuration will be lost.
676 * @return: 0 on Success and negative value otherwise.
678 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
679 enum ena_admin_hash_functions *func,
682 /* ena_com_fill_hash_ctrl - Fill RSS hash control
683 * @ena_dev: ENA communication layer struct.
684 * @proto: The protocol to configure.
685 * @hash_fields: bit mask of ena_admin_flow_hash_fields
687 * Fill the ena_dev resources with the desire hash control (the ethernet
688 * fields that take part of the hash) for a specific protocol.
689 * To flush the hash control to the device, the caller should call
690 * ena_com_set_hash_ctrl.
692 * @return: 0 on Success and negative value otherwise.
694 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
695 enum ena_admin_flow_hash_proto proto,
698 /* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
699 * @ena_dev: ENA communication layer struct
701 * Flush the hash control (the ethernet fields that take part of the hash)
703 * @note: Prior to this method the caller should call ena_com_fill_hash_ctrl.
705 * @return: 0 on Success and negative value otherwise.
707 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
709 /* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
710 * @ena_dev: ENA communication layer struct
711 * @proto: The protocol to retrieve.
712 * @fields: bit mask of ena_admin_flow_hash_fields.
714 * Retrieve the hash control from the device.
716 * @note, If the caller called ena_com_fill_hash_ctrl but didn't flash
717 * it to the device, the new configuration will be lost.
719 * @return: 0 on Success and negative value otherwise.
721 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
722 enum ena_admin_flow_hash_proto proto,
725 /* ena_com_set_default_hash_ctrl - Set the hash control to a default
727 * @ena_dev: ENA communication layer struct
729 * Fill the ena_dev resources with the default hash control configuration.
730 * To flush the hash control to the device, the caller should call
731 * ena_com_set_hash_ctrl.
733 * @return: 0 on Success and negative value otherwise.
735 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
737 /* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
739 * @ena_dev: ENA communication layer struct.
740 * @entry_idx - indirection table entry.
741 * @entry_value - redirection value
743 * Fill a single entry of the RSS indirection table in the ena_dev resources.
744 * To flush the indirection table to the device, the called should call
745 * ena_com_indirect_table_set.
747 * @return: 0 on Success and negative value otherwise.
749 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
750 u16 entry_idx, u16 entry_value);
752 /* ena_com_indirect_table_set - Flush the indirection table to the device.
753 * @ena_dev: ENA communication layer struct
755 * Flush the indirection hash control to the device.
756 * Prior to this method the caller should call ena_com_indirect_table_fill_entry
758 * @return: 0 on Success and negative value otherwise.
760 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
762 /* ena_com_indirect_table_get - Retrieve the indirection table from the device.
763 * @ena_dev: ENA communication layer struct
764 * @ind_tbl: indirection table
766 * Retrieve the RSS indirection table from the device.
768 * @note: If the caller called ena_com_indirect_table_fill_entry but didn't
769 * flash it to the device, the new configuration will be lost.
771 * @return: 0 on Success and negative value otherwise.
773 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
775 /* ena_com_allocate_host_info - Allocate host info resources.
776 * @ena_dev: ENA communication layer struct
778 * @return: 0 on Success and negative value otherwise.
780 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
782 /* ena_com_allocate_debug_area - Allocate debug area.
783 * @ena_dev: ENA communication layer struct
784 * @debug_area_size - debug area size.
786 * @return: 0 on Success and negative value otherwise.
788 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
789 u32 debug_area_size);
791 /* ena_com_delete_debug_area - Free the debug area resources.
792 * @ena_dev: ENA communication layer struct
794 * Free the allocate debug area.
796 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
798 /* ena_com_delete_host_info - Free the host info resources.
799 * @ena_dev: ENA communication layer struct
801 * Free the allocate host info.
803 void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
805 /* ena_com_set_host_attributes - Update the device with the host
806 * attributes (debug area and host info) base address.
807 * @ena_dev: ENA communication layer struct
809 * @return: 0 on Success and negative value otherwise.
811 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
813 /* ena_com_create_io_cq - Create io completion queue.
814 * @ena_dev: ENA communication layer struct
815 * @io_cq - io completion queue handler
817 * Create IO completion queue.
819 * @return - 0 on success, negative value on failure.
821 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
822 struct ena_com_io_cq *io_cq);
824 /* ena_com_destroy_io_cq - Destroy io completion queue.
825 * @ena_dev: ENA communication layer struct
826 * @io_cq - io completion queue handler
828 * Destroy IO completion queue.
830 * @return - 0 on success, negative value on failure.
832 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
833 struct ena_com_io_cq *io_cq);
835 /* ena_com_execute_admin_command - Execute admin command
836 * @admin_queue: admin queue.
837 * @cmd: the admin command to execute.
838 * @cmd_size: the command size.
839 * @cmd_completion: command completion return value.
840 * @cmd_comp_size: command completion size.
842 * Submit an admin command and then wait until the device will return a
844 * The completion will be copyed into cmd_comp.
846 * @return - 0 on success, negative value on failure.
848 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
849 struct ena_admin_aq_entry *cmd,
851 struct ena_admin_acq_entry *cmd_comp,
852 size_t cmd_comp_size);
854 /* ena_com_init_interrupt_moderation - Init interrupt moderation
855 * @ena_dev: ENA communication layer struct
857 * @return - 0 on success, negative value on failure.
859 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
861 /* ena_com_destroy_interrupt_moderation - Destroy interrupt moderation resources
862 * @ena_dev: ENA communication layer struct
864 void ena_com_destroy_interrupt_moderation(struct ena_com_dev *ena_dev);
866 /* ena_com_interrupt_moderation_supported - Return if interrupt moderation
867 * capability is supported by the device.
869 * @return - supported or not.
871 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
873 /* ena_com_config_default_interrupt_moderation_table - Restore the interrupt
874 * moderation table back to the default parameters.
875 * @ena_dev: ENA communication layer struct
878 ena_com_config_default_interrupt_moderation_table(struct ena_com_dev *ena_dev);
880 /* ena_com_update_nonadaptive_moderation_interval_tx - Update the
881 * non-adaptive interval in Tx direction.
882 * @ena_dev: ENA communication layer struct
883 * @tx_coalesce_usecs: Interval in usec.
885 * @return - 0 on success, negative value on failure.
888 ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
889 u32 tx_coalesce_usecs);
891 /* ena_com_update_nonadaptive_moderation_interval_rx - Update the
892 * non-adaptive interval in Rx direction.
893 * @ena_dev: ENA communication layer struct
894 * @rx_coalesce_usecs: Interval in usec.
896 * @return - 0 on success, negative value on failure.
899 ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
900 u32 rx_coalesce_usecs);
902 /* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
903 * non-adaptive interval in Tx direction.
904 * @ena_dev: ENA communication layer struct
906 * @return - interval in usec
909 ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
911 /* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
912 * non-adaptive interval in Rx direction.
913 * @ena_dev: ENA communication layer struct
915 * @return - interval in usec
918 ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
920 /* ena_com_init_intr_moderation_entry - Update a single entry in the interrupt
922 * @ena_dev: ENA communication layer struct
923 * @level: Interrupt moderation table level
924 * @entry: Entry value
926 * Update a single entry in the interrupt moderation table.
928 void ena_com_init_intr_moderation_entry(struct ena_com_dev *ena_dev,
929 enum ena_intr_moder_level level,
930 struct ena_intr_moder_entry *entry);
932 /* ena_com_get_intr_moderation_entry - Init ena_intr_moder_entry.
933 * @ena_dev: ENA communication layer struct
934 * @level: Interrupt moderation table level
935 * @entry: Entry to fill.
937 * Initialize the entry according to the adaptive interrupt moderation table.
939 void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
940 enum ena_intr_moder_level level,
941 struct ena_intr_moder_entry *entry);
944 ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
946 return ena_dev->adaptive_coalescing;
950 ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
952 ena_dev->adaptive_coalescing = true;
956 ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
958 ena_dev->adaptive_coalescing = false;
961 /* ena_com_calculate_interrupt_delay - Calculate new interrupt delay
962 * @ena_dev: ENA communication layer struct
963 * @pkts: Number of packets since the last update
964 * @bytes: Number of bytes received since the last update.
965 * @smoothed_interval: Returned interval
966 * @moder_tbl_idx: Current table level as input update new level as return
970 ena_com_calculate_interrupt_delay(struct ena_com_dev *ena_dev,
973 unsigned int *smoothed_interval,
974 unsigned int *moder_tbl_idx)
976 enum ena_intr_moder_level curr_moder_idx, new_moder_idx;
977 struct ena_intr_moder_entry *curr_moder_entry;
978 struct ena_intr_moder_entry *pred_moder_entry;
979 struct ena_intr_moder_entry *new_moder_entry;
980 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
981 unsigned int interval;
983 /* We apply adaptive moderation on Rx path only.
984 * Tx uses static interrupt moderation.
987 /* Tx interrupt, or spurious interrupt,
988 * in both cases we just use same delay values
992 curr_moder_idx = (enum ena_intr_moder_level)(*moder_tbl_idx);
993 if (unlikely(curr_moder_idx >= ENA_INTR_MAX_NUM_OF_LEVELS)) {
994 ena_trc_err("Wrong moderation index %u\n", curr_moder_idx);
998 curr_moder_entry = &intr_moder_tbl[curr_moder_idx];
999 new_moder_idx = curr_moder_idx;
1001 if (curr_moder_idx == ENA_INTR_MODER_LOWEST) {
1002 if ((pkts > curr_moder_entry->pkts_per_interval) ||
1003 (bytes > curr_moder_entry->bytes_per_interval))
1004 new_moder_idx = (enum ena_intr_moder_level)(curr_moder_idx + 1);
1006 pred_moder_entry = &intr_moder_tbl[curr_moder_idx - 1];
1008 if ((pkts <= pred_moder_entry->pkts_per_interval) ||
1009 (bytes <= pred_moder_entry->bytes_per_interval))
1010 new_moder_idx = (enum ena_intr_moder_level)(curr_moder_idx - 1);
1011 else if ((pkts > curr_moder_entry->pkts_per_interval) ||
1012 (bytes > curr_moder_entry->bytes_per_interval)) {
1013 if (curr_moder_idx != ENA_INTR_MODER_HIGHEST)
1014 new_moder_idx = (enum ena_intr_moder_level)(curr_moder_idx + 1);
1017 new_moder_entry = &intr_moder_tbl[new_moder_idx];
1019 interval = new_moder_entry->intr_moder_interval;
1020 *smoothed_interval = (
1021 (interval * ENA_INTR_DELAY_NEW_VALUE_WEIGHT +
1022 ENA_INTR_DELAY_OLD_VALUE_WEIGHT * (*smoothed_interval)) + 5) /
1025 *moder_tbl_idx = new_moder_idx;
1028 /* ena_com_update_intr_reg - Prepare interrupt register
1029 * @intr_reg: interrupt register to update.
1030 * @rx_delay_interval: Rx interval in usecs
1031 * @tx_delay_interval: Tx interval in usecs
1032 * @unmask: unask enable/disable
1034 * Prepare interrupt update register with the supplied parameters.
1036 static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
1037 u32 rx_delay_interval,
1038 u32 tx_delay_interval,
1041 intr_reg->intr_control = 0;
1042 intr_reg->intr_control |= rx_delay_interval &
1043 ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
1045 intr_reg->intr_control |=
1046 (tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
1047 & ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
1050 intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
1053 int ena_com_get_dev_extended_stats(struct ena_com_dev *ena_dev, char *buff,
1056 int ena_com_extended_stats_set_func_queue(struct ena_com_dev *ena_dev,
1059 #if defined(__cplusplus)
1061 #endif /* __cplusplus */
1062 #endif /* !(ENA_COM) */