1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
3 * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
9 #include <linux/compiler.h>
10 #include <linux/delay.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/gfp.h>
14 #include <linux/prefetch.h>
15 #include <linux/sched.h>
16 #include <linux/sizes.h>
17 #include <linux/spinlock.h>
18 #include <linux/types.h>
19 #include <linux/wait.h>
20 #include <linux/netdevice.h>
22 #include "ena_common_defs.h"
23 #include "ena_admin_defs.h"
24 #include "ena_eth_io_defs.h"
25 #include "ena_regs_defs.h"
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #define ENA_MAX_NUM_IO_QUEUES 128U
31 /* We need to queues for each IO (on for Tx and one for Rx) */
32 #define ENA_TOTAL_NUM_QUEUES (2 * (ENA_MAX_NUM_IO_QUEUES))
34 #define ENA_MAX_HANDLERS 256
36 #define ENA_MAX_PHYS_ADDR_SIZE_BITS 48
39 #define ENA_REG_READ_TIMEOUT 200000
41 #define ADMIN_SQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aq_entry))
42 #define ADMIN_CQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_acq_entry))
43 #define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aenq_entry))
45 /*****************************************************************************/
46 /*****************************************************************************/
47 /* ENA adaptive interrupt moderation settings */
49 #define ENA_INTR_INITIAL_TX_INTERVAL_USECS 64
50 #define ENA_INTR_INITIAL_RX_INTERVAL_USECS 0
51 #define ENA_DEFAULT_INTR_DELAY_RESOLUTION 1
53 #define ENA_HASH_KEY_SIZE 40
55 #define ENA_HW_HINTS_NO_TIMEOUT 0xFFFF
57 #define ENA_FEATURE_MAX_QUEUE_EXT_VER 1
59 struct ena_llq_configurations {
60 enum ena_admin_llq_header_location llq_header_location;
61 enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
62 enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
63 enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
64 u16 llq_ring_entry_size_value;
67 enum queue_direction {
68 ENA_COM_IO_QUEUE_DIRECTION_TX,
69 ENA_COM_IO_QUEUE_DIRECTION_RX
73 dma_addr_t paddr; /**< Buffer physical address */
74 u16 len; /**< Buffer length in bytes */
77 struct ena_com_rx_buf_info {
82 struct ena_com_io_desc_addr {
83 u8 __iomem *pbuf_dev_addr; /* LLQ address */
88 struct ena_com_tx_meta {
92 u16 l4_hdr_len; /* In words */
95 struct ena_com_llq_info {
96 u16 header_location_ctrl;
98 u16 desc_list_entry_size_ctrl;
99 u16 desc_list_entry_size;
100 u16 descs_num_before_header;
102 u16 max_entries_in_tx_burst;
103 bool disable_meta_caching;
106 struct ena_com_io_cq {
107 struct ena_com_io_desc_addr cdesc_addr;
109 /* Interrupt unmask register */
110 u32 __iomem *unmask_reg;
112 /* The completion queue head doorbell register */
113 u32 __iomem *cq_head_db_reg;
115 /* numa configuration register (for TPH) */
116 u32 __iomem *numa_node_cfg_reg;
118 /* The value to write to the above register to unmask
119 * the interrupt of this queue
123 enum queue_direction direction;
125 /* holds the number of cdesc of the current packet */
126 u16 cur_rx_pkt_cdesc_count;
127 /* save the firt cdesc idx of the current packet */
128 u16 cur_rx_pkt_cdesc_start_idx;
134 /* Device queue index */
137 u16 last_head_update;
139 u8 cdesc_entry_size_in_bytes;
141 } ____cacheline_aligned;
143 struct ena_com_io_bounce_buffer_control {
147 u16 buffers_num; /* Must be a power of 2 */
150 /* This struct is to keep tracking the current location of the next llq entry */
151 struct ena_com_llq_pkt_ctrl {
154 u16 descs_left_in_line;
157 struct ena_com_io_sq {
158 struct ena_com_io_desc_addr desc_addr;
160 u32 __iomem *db_addr;
161 u8 __iomem *header_addr;
163 enum queue_direction direction;
164 enum ena_admin_placement_policy_type mem_queue_type;
166 bool disable_meta_caching;
169 struct ena_com_tx_meta cached_tx_meta;
170 struct ena_com_llq_info llq_info;
171 struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
172 struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
180 u16 llq_last_copy_tail;
181 u32 tx_max_header_size;
185 u16 entries_in_tx_burst_left;
186 } ____cacheline_aligned;
188 struct ena_com_admin_cq {
189 struct ena_admin_acq_entry *entries;
196 struct ena_com_admin_sq {
197 struct ena_admin_aq_entry *entries;
200 u32 __iomem *db_addr;
208 struct ena_com_stats_admin {
216 struct ena_com_admin_queue {
218 struct ena_com_dev *ena_dev;
219 spinlock_t q_lock; /* spinlock for the admin queue */
221 struct ena_comp_ctx *comp_ctx;
222 u32 completion_timeout;
224 struct ena_com_admin_cq cq;
225 struct ena_com_admin_sq sq;
227 /* Indicate if the admin queue should poll for completion */
230 /* Define if fallback to polling mode should occur */
235 /* Indicate that the ena was initialized and can
236 * process new admin commands
240 /* Count the number of outstanding admin commands */
241 atomic_t outstanding_cmds;
243 struct ena_com_stats_admin stats;
246 struct ena_aenq_handlers;
248 struct ena_com_aenq {
251 struct ena_admin_aenq_entry *entries;
254 struct ena_aenq_handlers *aenq_handlers;
257 struct ena_com_mmio_read {
258 struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
259 dma_addr_t read_resp_dma_addr;
260 u32 reg_read_to; /* in us */
262 bool readless_supported;
263 /* spin lock to ensure a single outstanding read */
269 u16 *host_rss_ind_tbl;
270 struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
271 dma_addr_t rss_ind_tbl_dma_addr;
275 enum ena_admin_hash_functions hash_func;
276 struct ena_admin_feature_rss_flow_hash_control *hash_key;
277 dma_addr_t hash_key_dma_addr;
281 struct ena_admin_feature_rss_hash_control *hash_ctrl;
282 dma_addr_t hash_ctrl_dma_addr;
286 struct ena_host_attribute {
288 u8 *debug_area_virt_addr;
289 dma_addr_t debug_area_dma_addr;
292 /* Host information */
293 struct ena_admin_host_info *host_info;
294 dma_addr_t host_info_dma_addr;
297 /* Each ena_dev is a PCI function. */
299 struct ena_com_admin_queue admin_queue;
300 struct ena_com_aenq aenq;
301 struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
302 struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
304 void __iomem *mem_bar;
307 enum ena_admin_placement_policy_type tx_mem_queue_type;
308 u32 tx_max_header_size;
309 u16 stats_func; /* Selected function for extended statistic dump */
310 u16 stats_queue; /* Selected queue for extended statistic dump */
312 struct ena_com_mmio_read mmio_read;
315 u32 supported_features;
318 struct ena_host_attribute host_attr;
319 bool adaptive_coalescing;
320 u16 intr_delay_resolution;
322 /* interrupt moderation intervals are in usec divided by
323 * intr_delay_resolution, which is supplied by the device.
325 u32 intr_moder_tx_interval;
326 u32 intr_moder_rx_interval;
328 struct ena_intr_moder_entry *intr_moder_tbl;
330 struct ena_com_llq_info llq_info;
332 u32 ena_min_poll_delay_us;
335 struct ena_com_dev_get_features_ctx {
336 struct ena_admin_queue_feature_desc max_queues;
337 struct ena_admin_queue_ext_feature_desc max_queue_ext;
338 struct ena_admin_device_attr_feature_desc dev_attr;
339 struct ena_admin_feature_aenq_desc aenq;
340 struct ena_admin_feature_offload_desc offload;
341 struct ena_admin_ena_hw_hints hw_hints;
342 struct ena_admin_feature_llq_desc llq;
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 /*****************************************************************************/
366 /* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
367 * @ena_dev: ENA communication layer struct
369 * Initialize the register read mechanism.
371 * @note: This method must be the first stage in the initialization sequence.
373 * @return - 0 on success, negative value on failure.
375 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
377 /* ena_com_set_mmio_read_mode - Enable/disable the indirect mmio reg read mechanism
378 * @ena_dev: ENA communication layer struct
379 * @readless_supported: readless mode (enable/disable)
381 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
382 bool readless_supported);
384 /* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
385 * value physical address.
386 * @ena_dev: ENA communication layer struct
388 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
390 /* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
391 * @ena_dev: ENA communication layer struct
393 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
395 /* ena_com_admin_init - Init the admin and the async queues
396 * @ena_dev: ENA communication layer struct
397 * @aenq_handlers: Those handlers to be called upon event.
399 * Initialize the admin submission and completion queues.
400 * Initialize the asynchronous events notification queues.
402 * @return - 0 on success, negative value on failure.
404 int ena_com_admin_init(struct ena_com_dev *ena_dev,
405 struct ena_aenq_handlers *aenq_handlers);
407 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
408 * @ena_dev: ENA communication layer struct
410 * @note: Before calling this method, the caller must validate that the device
411 * won't send any additional admin completions/aenq.
412 * To achieve that, a FLR is recommended.
414 void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
416 /* ena_com_dev_reset - Perform device FLR to the device.
417 * @ena_dev: ENA communication layer struct
418 * @reset_reason: Specify what is the trigger for the reset in case of an error.
420 * @return - 0 on success, negative value on failure.
422 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
423 enum ena_regs_reset_reason_types reset_reason);
425 /* ena_com_create_io_queue - Create io queue.
426 * @ena_dev: ENA communication layer struct
427 * @ctx - create context structure
429 * Create the submission and the completion queues.
431 * @return - 0 on success, negative value on failure.
433 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
434 struct ena_com_create_io_ctx *ctx);
436 /* ena_com_destroy_io_queue - Destroy IO queue with the queue id - qid.
437 * @ena_dev: ENA communication layer struct
438 * @qid - the caller virtual queue id.
440 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
442 /* ena_com_get_io_handlers - Return the io queue handlers
443 * @ena_dev: ENA communication layer struct
444 * @qid - the caller virtual queue id.
445 * @io_sq - IO submission queue handler
446 * @io_cq - IO completion queue handler.
448 * @return - 0 on success, negative value on failure.
450 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
451 struct ena_com_io_sq **io_sq,
452 struct ena_com_io_cq **io_cq);
454 /* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
455 * @ena_dev: ENA communication layer struct
457 * After this method, aenq event can be received via AENQ.
459 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
461 /* ena_com_set_admin_running_state - Set the state of the admin queue
462 * @ena_dev: ENA communication layer struct
464 * Change the state of the admin queue (enable/disable)
466 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
468 /* ena_com_get_admin_running_state - Get the admin queue state
469 * @ena_dev: ENA communication layer struct
471 * Retrieve the state of the admin queue (enable/disable)
473 * @return - current polling mode (enable/disable)
475 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
477 /* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
478 * @ena_dev: ENA communication layer struct
479 * @polling: ENAble/Disable polling mode
481 * Set the admin completion mode.
483 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
485 /* ena_com_set_admin_auto_polling_mode - Enable autoswitch to polling mode
486 * @ena_dev: ENA communication layer struct
487 * @polling: Enable/Disable polling mode
489 * Set the autopolling mode.
490 * If autopolling is on:
491 * In case of missing interrupt when data is available switch to polling.
493 void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
496 /* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
497 * @ena_dev: ENA communication layer struct
499 * This method goes over the admin completion queue and wakes up all the pending
500 * threads that wait on the commands wait event.
502 * @note: Should be called after MSI-X interrupt.
504 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
506 /* ena_com_aenq_intr_handler - AENQ interrupt handler
507 * @ena_dev: ENA communication layer struct
509 * This method goes over the async event notification queue and calls the proper
512 void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data);
514 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
515 * @ena_dev: ENA communication layer struct
517 * This method aborts all the outstanding admin commands.
518 * The caller should then call ena_com_wait_for_abort_completion to make sure
519 * all the commands were completed.
521 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
523 /* ena_com_wait_for_abort_completion - Wait for admin commands abort.
524 * @ena_dev: ENA communication layer struct
526 * This method waits until all the outstanding admin commands are completed.
528 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
530 /* ena_com_validate_version - Validate the device parameters
531 * @ena_dev: ENA communication layer struct
533 * This method verifies the device parameters are the same as the saved
534 * parameters in ena_dev.
535 * This method is useful after device reset, to validate the device mac address
536 * and the device offloads are the same as before the reset.
538 * @return - 0 on success negative value otherwise.
540 int ena_com_validate_version(struct ena_com_dev *ena_dev);
542 /* ena_com_get_link_params - Retrieve physical link parameters.
543 * @ena_dev: ENA communication layer struct
544 * @resp: Link parameters
546 * Retrieve the physical link parameters,
547 * like speed, auto-negotiation and full duplex support.
549 * @return - 0 on Success negative value otherwise.
551 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
552 struct ena_admin_get_feat_resp *resp);
554 /* ena_com_get_dma_width - Retrieve physical dma address width the device
556 * @ena_dev: ENA communication layer struct
558 * Retrieve the maximum physical address bits the device can handle.
560 * @return: > 0 on Success and negative value otherwise.
562 int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
564 /* ena_com_set_aenq_config - Set aenq groups configurations
565 * @ena_dev: ENA communication layer struct
566 * @groups flag: bit fields flags of enum ena_admin_aenq_group.
568 * Configure which aenq event group the driver would like to receive.
570 * @return: 0 on Success and negative value otherwise.
572 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
574 /* ena_com_get_dev_attr_feat - Get device features
575 * @ena_dev: ENA communication layer struct
576 * @get_feat_ctx: returned context that contain the get features.
578 * @return: 0 on Success and negative value otherwise.
580 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
581 struct ena_com_dev_get_features_ctx *get_feat_ctx);
583 /* ena_com_get_dev_basic_stats - Get device basic statistics
584 * @ena_dev: ENA communication layer struct
585 * @stats: stats return value
587 * @return: 0 on Success and negative value otherwise.
589 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
590 struct ena_admin_basic_stats *stats);
592 /* ena_com_get_eni_stats - Get extended network interface statistics
593 * @ena_dev: ENA communication layer struct
594 * @stats: stats return value
596 * @return: 0 on Success and negative value otherwise.
598 int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
599 struct ena_admin_eni_stats *stats);
601 /* ena_com_set_dev_mtu - Configure the device mtu.
602 * @ena_dev: ENA communication layer struct
605 * @return: 0 on Success and negative value otherwise.
607 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu);
609 /* ena_com_get_offload_settings - Retrieve the device offloads capabilities
610 * @ena_dev: ENA communication layer struct
611 * @offlad: offload return value
613 * @return: 0 on Success and negative value otherwise.
615 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
616 struct ena_admin_feature_offload_desc *offload);
618 /* ena_com_rss_init - Init RSS
619 * @ena_dev: ENA communication layer struct
620 * @log_size: indirection log size
622 * Allocate RSS/RFS resources.
623 * The caller then can configure rss using ena_com_set_hash_function,
624 * ena_com_set_hash_ctrl and ena_com_indirect_table_set.
626 * @return: 0 on Success and negative value otherwise.
628 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
630 /* ena_com_rss_destroy - Destroy rss
631 * @ena_dev: ENA communication layer struct
633 * Free all the RSS/RFS resources.
635 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
637 /* ena_com_get_current_hash_function - Get RSS hash function
638 * @ena_dev: ENA communication layer struct
640 * Return the current hash function.
641 * @return: 0 or one of the ena_admin_hash_functions values.
643 int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);
645 /* ena_com_fill_hash_function - Fill RSS hash function
646 * @ena_dev: ENA communication layer struct
647 * @func: The hash function (Toeplitz or crc)
648 * @key: Hash key (for toeplitz hash)
649 * @key_len: key length (max length 10 DW)
650 * @init_val: initial value for the hash function
652 * Fill the ena_dev resources with the desire hash function, hash key, key_len
653 * and key initial value (if needed by the hash function).
654 * To flush the key into the device the caller should call
655 * ena_com_set_hash_function.
657 * @return: 0 on Success and negative value otherwise.
659 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
660 enum ena_admin_hash_functions func,
661 const u8 *key, u16 key_len, u32 init_val);
663 /* ena_com_set_hash_function - Flush the hash function and it dependencies to
665 * @ena_dev: ENA communication layer struct
667 * Flush the hash function and it dependencies (key, key length and
668 * initial value) if needed.
670 * @note: Prior to this method the caller should call ena_com_fill_hash_function
672 * @return: 0 on Success and negative value otherwise.
674 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
676 /* ena_com_get_hash_function - Retrieve the hash function from the device.
677 * @ena_dev: ENA communication layer struct
678 * @func: hash function
680 * Retrieve the hash function from the device.
682 * @note: If the caller called ena_com_fill_hash_function but didn't flush
683 * it to the device, the new configuration will be lost.
685 * @return: 0 on Success and negative value otherwise.
687 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
688 enum ena_admin_hash_functions *func);
690 /* ena_com_get_hash_key - Retrieve the hash key
691 * @ena_dev: ENA communication layer struct
694 * Retrieve the hash key.
696 * @note: If the caller called ena_com_fill_hash_key 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_key(struct ena_com_dev *ena_dev, u8 *key);
702 /* ena_com_fill_hash_ctrl - Fill RSS hash control
703 * @ena_dev: ENA communication layer struct.
704 * @proto: The protocol to configure.
705 * @hash_fields: bit mask of ena_admin_flow_hash_fields
707 * Fill the ena_dev resources with the desire hash control (the ethernet
708 * fields that take part of the hash) for a specific protocol.
709 * To flush the hash control to the device, the caller should call
710 * ena_com_set_hash_ctrl.
712 * @return: 0 on Success and negative value otherwise.
714 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
715 enum ena_admin_flow_hash_proto proto,
718 /* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
719 * @ena_dev: ENA communication layer struct
721 * Flush the hash control (the ethernet fields that take part of the hash)
723 * @note: Prior to this method the caller should call ena_com_fill_hash_ctrl.
725 * @return: 0 on Success and negative value otherwise.
727 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
729 /* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
730 * @ena_dev: ENA communication layer struct
731 * @proto: The protocol to retrieve.
732 * @fields: bit mask of ena_admin_flow_hash_fields.
734 * Retrieve the hash control from the device.
736 * @note: If the caller called ena_com_fill_hash_ctrl but didn't flush
737 * it to the device, the new configuration will be lost.
739 * @return: 0 on Success and negative value otherwise.
741 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
742 enum ena_admin_flow_hash_proto proto,
745 /* ena_com_set_default_hash_ctrl - Set the hash control to a default
747 * @ena_dev: ENA communication layer struct
749 * Fill the ena_dev resources with the default hash control configuration.
750 * To flush the hash control to the device, the caller should call
751 * ena_com_set_hash_ctrl.
753 * @return: 0 on Success and negative value otherwise.
755 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
757 /* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
759 * @ena_dev: ENA communication layer struct.
760 * @entry_idx - indirection table entry.
761 * @entry_value - redirection value
763 * Fill a single entry of the RSS indirection table in the ena_dev resources.
764 * To flush the indirection table to the device, the called should call
765 * ena_com_indirect_table_set.
767 * @return: 0 on Success and negative value otherwise.
769 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
770 u16 entry_idx, u16 entry_value);
772 /* ena_com_indirect_table_set - Flush the indirection table to the device.
773 * @ena_dev: ENA communication layer struct
775 * Flush the indirection hash control to the device.
776 * Prior to this method the caller should call ena_com_indirect_table_fill_entry
778 * @return: 0 on Success and negative value otherwise.
780 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
782 /* ena_com_indirect_table_get - Retrieve the indirection table from the device.
783 * @ena_dev: ENA communication layer struct
784 * @ind_tbl: indirection table
786 * Retrieve the RSS indirection table from the device.
788 * @note: If the caller called ena_com_indirect_table_fill_entry but didn't flush
789 * it to the device, the new configuration will be lost.
791 * @return: 0 on Success and negative value otherwise.
793 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
795 /* ena_com_allocate_host_info - Allocate host info resources.
796 * @ena_dev: ENA communication layer struct
798 * @return: 0 on Success and negative value otherwise.
800 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
802 /* ena_com_allocate_debug_area - Allocate debug area.
803 * @ena_dev: ENA communication layer struct
804 * @debug_area_size - debug area size.
806 * @return: 0 on Success and negative value otherwise.
808 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
809 u32 debug_area_size);
811 /* ena_com_delete_debug_area - Free the debug area resources.
812 * @ena_dev: ENA communication layer struct
814 * Free the allocated debug area.
816 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
818 /* ena_com_delete_host_info - Free the host info resources.
819 * @ena_dev: ENA communication layer struct
821 * Free the allocated host info.
823 void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
825 /* ena_com_set_host_attributes - Update the device with the host
826 * attributes (debug area and host info) base address.
827 * @ena_dev: ENA communication layer struct
829 * @return: 0 on Success and negative value otherwise.
831 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
833 /* ena_com_create_io_cq - Create io completion queue.
834 * @ena_dev: ENA communication layer struct
835 * @io_cq - io completion queue handler
837 * Create IO completion queue.
839 * @return - 0 on success, negative value on failure.
841 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
842 struct ena_com_io_cq *io_cq);
844 /* ena_com_destroy_io_cq - Destroy io completion queue.
845 * @ena_dev: ENA communication layer struct
846 * @io_cq - io completion queue handler
848 * Destroy IO completion queue.
850 * @return - 0 on success, negative value on failure.
852 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
853 struct ena_com_io_cq *io_cq);
855 /* ena_com_execute_admin_command - Execute admin command
856 * @admin_queue: admin queue.
857 * @cmd: the admin command to execute.
858 * @cmd_size: the command size.
859 * @cmd_completion: command completion return value.
860 * @cmd_comp_size: command completion size.
862 * Submit an admin command and then wait until the device returns a
864 * The completion will be copied into cmd_comp.
866 * @return - 0 on success, negative value on failure.
868 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
869 struct ena_admin_aq_entry *cmd,
871 struct ena_admin_acq_entry *cmd_comp,
872 size_t cmd_comp_size);
874 /* ena_com_init_interrupt_moderation - Init interrupt moderation
875 * @ena_dev: ENA communication layer struct
877 * @return - 0 on success, negative value on failure.
879 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
881 /* ena_com_interrupt_moderation_supported - Return if interrupt moderation
882 * capability is supported by the device.
884 * @return - supported or not.
886 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
888 /* ena_com_update_nonadaptive_moderation_interval_tx - Update the
889 * non-adaptive interval in Tx direction.
890 * @ena_dev: ENA communication layer struct
891 * @tx_coalesce_usecs: Interval in usec.
893 * @return - 0 on success, negative value on failure.
895 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
896 u32 tx_coalesce_usecs);
898 /* ena_com_update_nonadaptive_moderation_interval_rx - Update the
899 * non-adaptive interval in Rx direction.
900 * @ena_dev: ENA communication layer struct
901 * @rx_coalesce_usecs: Interval in usec.
903 * @return - 0 on success, negative value on failure.
905 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
906 u32 rx_coalesce_usecs);
908 /* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
909 * non-adaptive interval in Tx direction.
910 * @ena_dev: ENA communication layer struct
912 * @return - interval in usec
914 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
916 /* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
917 * non-adaptive interval in Rx direction.
918 * @ena_dev: ENA communication layer struct
920 * @return - interval in usec
922 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
924 /* ena_com_config_dev_mode - Configure the placement policy of the device.
925 * @ena_dev: ENA communication layer struct
926 * @llq_features: LLQ feature descriptor, retrieve via
927 * ena_com_get_dev_attr_feat.
928 * @ena_llq_config: The default driver LLQ parameters configurations
930 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
931 struct ena_admin_feature_llq_desc *llq_features,
932 struct ena_llq_configurations *llq_default_config);
934 static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
936 return ena_dev->adaptive_coalescing;
939 static inline void ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
941 ena_dev->adaptive_coalescing = true;
944 static inline void ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
946 ena_dev->adaptive_coalescing = false;
949 /* ena_com_update_intr_reg - Prepare interrupt register
950 * @intr_reg: interrupt register to update.
951 * @rx_delay_interval: Rx interval in usecs
952 * @tx_delay_interval: Tx interval in usecs
953 * @unmask: unmask enable/disable
955 * Prepare interrupt update register with the supplied parameters.
957 static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
958 u32 rx_delay_interval,
959 u32 tx_delay_interval,
962 intr_reg->intr_control = 0;
963 intr_reg->intr_control |= rx_delay_interval &
964 ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
966 intr_reg->intr_control |=
967 (tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
968 & ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK;
971 intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
974 static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
976 u16 size, buffers_num;
979 size = bounce_buf_ctrl->buffer_size;
980 buffers_num = bounce_buf_ctrl->buffers_num;
982 buf = bounce_buf_ctrl->base_buffer +
983 (bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
985 prefetchw(bounce_buf_ctrl->base_buffer +
986 (bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
991 #endif /* !(ENA_COM) */