2 * Copyright 2015 Amazon.com, Inc. or its affiliates.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/compiler.h>
37 #include <linux/delay.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/gfp.h>
41 #include <linux/sched.h>
42 #include <linux/sizes.h>
43 #include <linux/spinlock.h>
44 #include <linux/types.h>
45 #include <linux/wait.h>
47 #include "ena_common_defs.h"
48 #include "ena_admin_defs.h"
49 #include "ena_eth_io_defs.h"
50 #include "ena_regs_defs.h"
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
55 #define ENA_MAX_NUM_IO_QUEUES 128U
56 /* We need to queues for each IO (on for Tx and one for Rx) */
57 #define ENA_TOTAL_NUM_QUEUES (2 * (ENA_MAX_NUM_IO_QUEUES))
59 #define ENA_MAX_HANDLERS 256
61 #define ENA_MAX_PHYS_ADDR_SIZE_BITS 48
64 #define ENA_REG_READ_TIMEOUT 200000
66 #define ADMIN_SQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aq_entry))
67 #define ADMIN_CQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_acq_entry))
68 #define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof(struct ena_admin_aenq_entry))
70 /*****************************************************************************/
71 /*****************************************************************************/
72 /* ENA adaptive interrupt moderation settings */
74 #define ENA_INTR_LOWEST_USECS (0)
75 #define ENA_INTR_LOWEST_PKTS (3)
76 #define ENA_INTR_LOWEST_BYTES (2 * 1524)
78 #define ENA_INTR_LOW_USECS (32)
79 #define ENA_INTR_LOW_PKTS (12)
80 #define ENA_INTR_LOW_BYTES (16 * 1024)
82 #define ENA_INTR_MID_USECS (80)
83 #define ENA_INTR_MID_PKTS (48)
84 #define ENA_INTR_MID_BYTES (64 * 1024)
86 #define ENA_INTR_HIGH_USECS (128)
87 #define ENA_INTR_HIGH_PKTS (96)
88 #define ENA_INTR_HIGH_BYTES (128 * 1024)
90 #define ENA_INTR_HIGHEST_USECS (192)
91 #define ENA_INTR_HIGHEST_PKTS (128)
92 #define ENA_INTR_HIGHEST_BYTES (192 * 1024)
94 #define ENA_INTR_INITIAL_TX_INTERVAL_USECS 196
95 #define ENA_INTR_INITIAL_RX_INTERVAL_USECS 4
96 #define ENA_INTR_DELAY_OLD_VALUE_WEIGHT 6
97 #define ENA_INTR_DELAY_NEW_VALUE_WEIGHT 4
98 #define ENA_INTR_MODER_LEVEL_STRIDE 2
99 #define ENA_INTR_BYTE_COUNT_NOT_SUPPORTED 0xFFFFFF
101 #define ENA_HW_HINTS_NO_TIMEOUT 0xFFFF
103 enum ena_intr_moder_level {
104 ENA_INTR_MODER_LOWEST = 0,
108 ENA_INTR_MODER_HIGHEST,
109 ENA_INTR_MAX_NUM_OF_LEVELS,
112 struct ena_llq_configurations {
113 enum ena_admin_llq_header_location llq_header_location;
114 enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
115 enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
116 enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
117 u16 llq_ring_entry_size_value;
120 struct ena_intr_moder_entry {
121 unsigned int intr_moder_interval;
122 unsigned int pkts_per_interval;
123 unsigned int bytes_per_interval;
126 enum queue_direction {
127 ENA_COM_IO_QUEUE_DIRECTION_TX,
128 ENA_COM_IO_QUEUE_DIRECTION_RX
132 dma_addr_t paddr; /**< Buffer physical address */
133 u16 len; /**< Buffer length in bytes */
136 struct ena_com_rx_buf_info {
141 struct ena_com_io_desc_addr {
142 u8 __iomem *pbuf_dev_addr; /* LLQ address */
144 dma_addr_t phys_addr;
147 struct ena_com_tx_meta {
151 u16 l4_hdr_len; /* In words */
154 struct ena_com_llq_info {
155 u16 header_location_ctrl;
156 u16 desc_stride_ctrl;
157 u16 desc_list_entry_size_ctrl;
158 u16 desc_list_entry_size;
159 u16 descs_num_before_header;
163 struct ena_com_io_cq {
164 struct ena_com_io_desc_addr cdesc_addr;
166 /* Interrupt unmask register */
167 u32 __iomem *unmask_reg;
169 /* The completion queue head doorbell register */
170 u32 __iomem *cq_head_db_reg;
172 /* numa configuration register (for TPH) */
173 u32 __iomem *numa_node_cfg_reg;
175 /* The value to write to the above register to unmask
176 * the interrupt of this queue
180 enum queue_direction direction;
182 /* holds the number of cdesc of the current packet */
183 u16 cur_rx_pkt_cdesc_count;
184 /* save the firt cdesc idx of the current packet */
185 u16 cur_rx_pkt_cdesc_start_idx;
191 /* Device queue index */
194 u16 last_head_update;
196 u8 cdesc_entry_size_in_bytes;
198 } ____cacheline_aligned;
200 struct ena_com_io_bounce_buffer_control {
204 u16 buffers_num; /* Must be a power of 2 */
207 /* This struct is to keep tracking the current location of the next llq entry */
208 struct ena_com_llq_pkt_ctrl {
211 u16 descs_left_in_line;
214 struct ena_com_io_sq {
215 struct ena_com_io_desc_addr desc_addr;
217 u32 __iomem *db_addr;
218 u8 __iomem *header_addr;
220 enum queue_direction direction;
221 enum ena_admin_placement_policy_type mem_queue_type;
224 struct ena_com_tx_meta cached_tx_meta;
225 struct ena_com_llq_info llq_info;
226 struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
227 struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
235 u16 llq_last_copy_tail;
236 u32 tx_max_header_size;
240 } ____cacheline_aligned;
242 struct ena_com_admin_cq {
243 struct ena_admin_acq_entry *entries;
250 struct ena_com_admin_sq {
251 struct ena_admin_aq_entry *entries;
254 u32 __iomem *db_addr;
262 struct ena_com_stats_admin {
270 struct ena_com_admin_queue {
272 spinlock_t q_lock; /* spinlock for the admin queue */
274 struct ena_comp_ctx *comp_ctx;
275 u32 completion_timeout;
277 struct ena_com_admin_cq cq;
278 struct ena_com_admin_sq sq;
280 /* Indicate if the admin queue should poll for completion */
285 /* Indicate that the ena was initialized and can
286 * process new admin commands
290 /* Count the number of outstanding admin commands */
291 atomic_t outstanding_cmds;
293 struct ena_com_stats_admin stats;
296 struct ena_aenq_handlers;
298 struct ena_com_aenq {
301 struct ena_admin_aenq_entry *entries;
304 struct ena_aenq_handlers *aenq_handlers;
307 struct ena_com_mmio_read {
308 struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
309 dma_addr_t read_resp_dma_addr;
310 u32 reg_read_to; /* in us */
312 bool readless_supported;
313 /* spin lock to ensure a single outstanding read */
319 u16 *host_rss_ind_tbl;
320 struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
321 dma_addr_t rss_ind_tbl_dma_addr;
325 enum ena_admin_hash_functions hash_func;
326 struct ena_admin_feature_rss_flow_hash_control *hash_key;
327 dma_addr_t hash_key_dma_addr;
331 struct ena_admin_feature_rss_hash_control *hash_ctrl;
332 dma_addr_t hash_ctrl_dma_addr;
336 struct ena_host_attribute {
338 u8 *debug_area_virt_addr;
339 dma_addr_t debug_area_dma_addr;
342 /* Host information */
343 struct ena_admin_host_info *host_info;
344 dma_addr_t host_info_dma_addr;
347 /* Each ena_dev is a PCI function. */
349 struct ena_com_admin_queue admin_queue;
350 struct ena_com_aenq aenq;
351 struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
352 struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
354 void __iomem *mem_bar;
357 enum ena_admin_placement_policy_type tx_mem_queue_type;
358 u32 tx_max_header_size;
359 u16 stats_func; /* Selected function for extended statistic dump */
360 u16 stats_queue; /* Selected queue for extended statistic dump */
362 struct ena_com_mmio_read mmio_read;
365 u32 supported_features;
368 struct ena_host_attribute host_attr;
369 bool adaptive_coalescing;
370 u16 intr_delay_resolution;
371 u32 intr_moder_tx_interval;
372 struct ena_intr_moder_entry *intr_moder_tbl;
374 struct ena_com_llq_info llq_info;
377 struct ena_com_dev_get_features_ctx {
378 struct ena_admin_queue_feature_desc max_queues;
379 struct ena_admin_device_attr_feature_desc dev_attr;
380 struct ena_admin_feature_aenq_desc aenq;
381 struct ena_admin_feature_offload_desc offload;
382 struct ena_admin_ena_hw_hints hw_hints;
383 struct ena_admin_feature_llq_desc llq;
386 struct ena_com_create_io_ctx {
387 enum ena_admin_placement_policy_type mem_queue_type;
388 enum queue_direction direction;
395 typedef void (*ena_aenq_handler)(void *data,
396 struct ena_admin_aenq_entry *aenq_e);
398 /* Holds aenq handlers. Indexed by AENQ event group */
399 struct ena_aenq_handlers {
400 ena_aenq_handler handlers[ENA_MAX_HANDLERS];
401 ena_aenq_handler unimplemented_handler;
404 /*****************************************************************************/
405 /*****************************************************************************/
407 /* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
408 * @ena_dev: ENA communication layer struct
410 * Initialize the register read mechanism.
412 * @note: This method must be the first stage in the initialization sequence.
414 * @return - 0 on success, negative value on failure.
416 int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
418 /* ena_com_set_mmio_read_mode - Enable/disable the mmio reg read mechanism
419 * @ena_dev: ENA communication layer struct
420 * @readless_supported: readless mode (enable/disable)
422 void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
423 bool readless_supported);
425 /* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
426 * value physical address.
427 * @ena_dev: ENA communication layer struct
429 void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
431 /* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
432 * @ena_dev: ENA communication layer struct
434 void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
436 /* ena_com_admin_init - Init the admin and the async queues
437 * @ena_dev: ENA communication layer struct
438 * @aenq_handlers: Those handlers to be called upon event.
440 * Initialize the admin submission and completion queues.
441 * Initialize the asynchronous events notification queues.
443 * @return - 0 on success, negative value on failure.
445 int ena_com_admin_init(struct ena_com_dev *ena_dev,
446 struct ena_aenq_handlers *aenq_handlers);
448 /* ena_com_admin_destroy - Destroy the admin and the async events queues.
449 * @ena_dev: ENA communication layer struct
451 * @note: Before calling this method, the caller must validate that the device
452 * won't send any additional admin completions/aenq.
453 * To achieve that, a FLR is recommended.
455 void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
457 /* ena_com_dev_reset - Perform device FLR to the device.
458 * @ena_dev: ENA communication layer struct
459 * @reset_reason: Specify what is the trigger for the reset in case of an error.
461 * @return - 0 on success, negative value on failure.
463 int ena_com_dev_reset(struct ena_com_dev *ena_dev,
464 enum ena_regs_reset_reason_types reset_reason);
466 /* ena_com_create_io_queue - Create io queue.
467 * @ena_dev: ENA communication layer struct
468 * @ctx - create context structure
470 * Create the submission and the completion queues.
472 * @return - 0 on success, negative value on failure.
474 int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
475 struct ena_com_create_io_ctx *ctx);
477 /* ena_com_destroy_io_queue - Destroy IO queue with the queue id - qid.
478 * @ena_dev: ENA communication layer struct
479 * @qid - the caller virtual queue id.
481 void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
483 /* ena_com_get_io_handlers - Return the io queue handlers
484 * @ena_dev: ENA communication layer struct
485 * @qid - the caller virtual queue id.
486 * @io_sq - IO submission queue handler
487 * @io_cq - IO completion queue handler.
489 * @return - 0 on success, negative value on failure.
491 int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
492 struct ena_com_io_sq **io_sq,
493 struct ena_com_io_cq **io_cq);
495 /* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
496 * @ena_dev: ENA communication layer struct
498 * After this method, aenq event can be received via AENQ.
500 void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
502 /* ena_com_set_admin_running_state - Set the state of the admin queue
503 * @ena_dev: ENA communication layer struct
505 * Change the state of the admin queue (enable/disable)
507 void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
509 /* ena_com_get_admin_running_state - Get the admin queue state
510 * @ena_dev: ENA communication layer struct
512 * Retrieve the state of the admin queue (enable/disable)
514 * @return - current polling mode (enable/disable)
516 bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
518 /* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
519 * @ena_dev: ENA communication layer struct
520 * @polling: ENAble/Disable polling mode
522 * Set the admin completion mode.
524 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
526 /* ena_com_set_admin_polling_mode - Get the admin completion queue polling mode
527 * @ena_dev: ENA communication layer struct
529 * Get the admin completion mode.
530 * If polling mode is on, ena_com_execute_admin_command will perform a
531 * polling on the admin completion queue for the commands completion,
532 * otherwise it will wait on wait event.
536 bool ena_com_get_ena_admin_polling_mode(struct ena_com_dev *ena_dev);
538 /* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
539 * @ena_dev: ENA communication layer struct
541 * This method go over the admin completion queue and wake up all the pending
542 * threads that wait on the commands wait event.
544 * @note: Should be called after MSI-X interrupt.
546 void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
548 /* ena_com_aenq_intr_handler - AENQ interrupt handler
549 * @ena_dev: ENA communication layer struct
551 * This method go over the async event notification queue and call the proper
554 void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data);
556 /* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
557 * @ena_dev: ENA communication layer struct
559 * This method aborts all the outstanding admin commands.
560 * The caller should then call ena_com_wait_for_abort_completion to make sure
561 * all the commands were completed.
563 void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
565 /* ena_com_wait_for_abort_completion - Wait for admin commands abort.
566 * @ena_dev: ENA communication layer struct
568 * This method wait until all the outstanding admin commands will be completed.
570 void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
572 /* ena_com_validate_version - Validate the device parameters
573 * @ena_dev: ENA communication layer struct
575 * This method validate the device parameters are the same as the saved
576 * parameters in ena_dev.
577 * This method is useful after device reset, to validate the device mac address
578 * and the device offloads are the same as before the reset.
580 * @return - 0 on success negative value otherwise.
582 int ena_com_validate_version(struct ena_com_dev *ena_dev);
584 /* ena_com_get_link_params - Retrieve physical link parameters.
585 * @ena_dev: ENA communication layer struct
586 * @resp: Link parameters
588 * Retrieve the physical link parameters,
589 * like speed, auto-negotiation and full duplex support.
591 * @return - 0 on Success negative value otherwise.
593 int ena_com_get_link_params(struct ena_com_dev *ena_dev,
594 struct ena_admin_get_feat_resp *resp);
596 /* ena_com_get_dma_width - Retrieve physical dma address width the device
598 * @ena_dev: ENA communication layer struct
600 * Retrieve the maximum physical address bits the device can handle.
602 * @return: > 0 on Success and negative value otherwise.
604 int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
606 /* ena_com_set_aenq_config - Set aenq groups configurations
607 * @ena_dev: ENA communication layer struct
608 * @groups flag: bit fields flags of enum ena_admin_aenq_group.
610 * Configure which aenq event group the driver would like to receive.
612 * @return: 0 on Success and negative value otherwise.
614 int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
616 /* ena_com_get_dev_attr_feat - Get device features
617 * @ena_dev: ENA communication layer struct
618 * @get_feat_ctx: returned context that contain the get features.
620 * @return: 0 on Success and negative value otherwise.
622 int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
623 struct ena_com_dev_get_features_ctx *get_feat_ctx);
625 /* ena_com_get_dev_basic_stats - Get device basic statistics
626 * @ena_dev: ENA communication layer struct
627 * @stats: stats return value
629 * @return: 0 on Success and negative value otherwise.
631 int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
632 struct ena_admin_basic_stats *stats);
634 /* ena_com_set_dev_mtu - Configure the device mtu.
635 * @ena_dev: ENA communication layer struct
638 * @return: 0 on Success and negative value otherwise.
640 int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu);
642 /* ena_com_get_offload_settings - Retrieve the device offloads capabilities
643 * @ena_dev: ENA communication layer struct
644 * @offlad: offload return value
646 * @return: 0 on Success and negative value otherwise.
648 int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
649 struct ena_admin_feature_offload_desc *offload);
651 /* ena_com_rss_init - Init RSS
652 * @ena_dev: ENA communication layer struct
653 * @log_size: indirection log size
655 * Allocate RSS/RFS resources.
656 * The caller then can configure rss using ena_com_set_hash_function,
657 * ena_com_set_hash_ctrl and ena_com_indirect_table_set.
659 * @return: 0 on Success and negative value otherwise.
661 int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
663 /* ena_com_rss_destroy - Destroy rss
664 * @ena_dev: ENA communication layer struct
666 * Free all the RSS/RFS resources.
668 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
670 /* ena_com_fill_hash_function - Fill RSS hash function
671 * @ena_dev: ENA communication layer struct
672 * @func: The hash function (Toeplitz or crc)
673 * @key: Hash key (for toeplitz hash)
674 * @key_len: key length (max length 10 DW)
675 * @init_val: initial value for the hash function
677 * Fill the ena_dev resources with the desire hash function, hash key, key_len
678 * and key initial value (if needed by the hash function).
679 * To flush the key into the device the caller should call
680 * ena_com_set_hash_function.
682 * @return: 0 on Success and negative value otherwise.
684 int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
685 enum ena_admin_hash_functions func,
686 const u8 *key, u16 key_len, u32 init_val);
688 /* ena_com_set_hash_function - Flush the hash function and it dependencies to
690 * @ena_dev: ENA communication layer struct
692 * Flush the hash function and it dependencies (key, key length and
693 * initial value) if needed.
695 * @note: Prior to this method the caller should call ena_com_fill_hash_function
697 * @return: 0 on Success and negative value otherwise.
699 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
701 /* ena_com_get_hash_function - Retrieve the hash function and the hash key
703 * @ena_dev: ENA communication layer struct
704 * @func: hash function
707 * Retrieve the hash function and the hash key from the device.
709 * @note: If the caller called ena_com_fill_hash_function but didn't flash
710 * it to the device, the new configuration will be lost.
712 * @return: 0 on Success and negative value otherwise.
714 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
715 enum ena_admin_hash_functions *func,
718 /* ena_com_fill_hash_ctrl - Fill RSS hash control
719 * @ena_dev: ENA communication layer struct.
720 * @proto: The protocol to configure.
721 * @hash_fields: bit mask of ena_admin_flow_hash_fields
723 * Fill the ena_dev resources with the desire hash control (the ethernet
724 * fields that take part of the hash) for a specific protocol.
725 * To flush the hash control to the device, the caller should call
726 * ena_com_set_hash_ctrl.
728 * @return: 0 on Success and negative value otherwise.
730 int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
731 enum ena_admin_flow_hash_proto proto,
734 /* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
735 * @ena_dev: ENA communication layer struct
737 * Flush the hash control (the ethernet fields that take part of the hash)
739 * @note: Prior to this method the caller should call ena_com_fill_hash_ctrl.
741 * @return: 0 on Success and negative value otherwise.
743 int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
745 /* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
746 * @ena_dev: ENA communication layer struct
747 * @proto: The protocol to retrieve.
748 * @fields: bit mask of ena_admin_flow_hash_fields.
750 * Retrieve the hash control from the device.
752 * @note, If the caller called ena_com_fill_hash_ctrl but didn't flash
753 * it to the device, the new configuration will be lost.
755 * @return: 0 on Success and negative value otherwise.
757 int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
758 enum ena_admin_flow_hash_proto proto,
761 /* ena_com_set_default_hash_ctrl - Set the hash control to a default
763 * @ena_dev: ENA communication layer struct
765 * Fill the ena_dev resources with the default hash control configuration.
766 * To flush the hash control to the device, the caller should call
767 * ena_com_set_hash_ctrl.
769 * @return: 0 on Success and negative value otherwise.
771 int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
773 /* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
775 * @ena_dev: ENA communication layer struct.
776 * @entry_idx - indirection table entry.
777 * @entry_value - redirection value
779 * Fill a single entry of the RSS indirection table in the ena_dev resources.
780 * To flush the indirection table to the device, the called should call
781 * ena_com_indirect_table_set.
783 * @return: 0 on Success and negative value otherwise.
785 int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
786 u16 entry_idx, u16 entry_value);
788 /* ena_com_indirect_table_set - Flush the indirection table to the device.
789 * @ena_dev: ENA communication layer struct
791 * Flush the indirection hash control to the device.
792 * Prior to this method the caller should call ena_com_indirect_table_fill_entry
794 * @return: 0 on Success and negative value otherwise.
796 int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
798 /* ena_com_indirect_table_get - Retrieve the indirection table from the device.
799 * @ena_dev: ENA communication layer struct
800 * @ind_tbl: indirection table
802 * Retrieve the RSS indirection table from the device.
804 * @note: If the caller called ena_com_indirect_table_fill_entry but didn't flash
805 * it to the device, the new configuration will be lost.
807 * @return: 0 on Success and negative value otherwise.
809 int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
811 /* ena_com_allocate_host_info - Allocate host info resources.
812 * @ena_dev: ENA communication layer struct
814 * @return: 0 on Success and negative value otherwise.
816 int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
818 /* ena_com_allocate_debug_area - Allocate debug area.
819 * @ena_dev: ENA communication layer struct
820 * @debug_area_size - debug area size.
822 * @return: 0 on Success and negative value otherwise.
824 int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
825 u32 debug_area_size);
827 /* ena_com_delete_debug_area - Free the debug area resources.
828 * @ena_dev: ENA communication layer struct
830 * Free the allocate debug area.
832 void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
834 /* ena_com_delete_host_info - Free the host info resources.
835 * @ena_dev: ENA communication layer struct
837 * Free the allocate host info.
839 void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
841 /* ena_com_set_host_attributes - Update the device with the host
842 * attributes (debug area and host info) base address.
843 * @ena_dev: ENA communication layer struct
845 * @return: 0 on Success and negative value otherwise.
847 int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
849 /* ena_com_create_io_cq - Create io completion queue.
850 * @ena_dev: ENA communication layer struct
851 * @io_cq - io completion queue handler
853 * Create IO completion queue.
855 * @return - 0 on success, negative value on failure.
857 int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
858 struct ena_com_io_cq *io_cq);
860 /* ena_com_destroy_io_cq - Destroy io completion queue.
861 * @ena_dev: ENA communication layer struct
862 * @io_cq - io completion queue handler
864 * Destroy IO completion queue.
866 * @return - 0 on success, negative value on failure.
868 int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
869 struct ena_com_io_cq *io_cq);
871 /* ena_com_execute_admin_command - Execute admin command
872 * @admin_queue: admin queue.
873 * @cmd: the admin command to execute.
874 * @cmd_size: the command size.
875 * @cmd_completion: command completion return value.
876 * @cmd_comp_size: command completion size.
878 * Submit an admin command and then wait until the device will return a
880 * The completion will be copyed into cmd_comp.
882 * @return - 0 on success, negative value on failure.
884 int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
885 struct ena_admin_aq_entry *cmd,
887 struct ena_admin_acq_entry *cmd_comp,
888 size_t cmd_comp_size);
890 /* ena_com_init_interrupt_moderation - Init interrupt moderation
891 * @ena_dev: ENA communication layer struct
893 * @return - 0 on success, negative value on failure.
895 int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
897 /* ena_com_destroy_interrupt_moderation - Destroy interrupt moderation resources
898 * @ena_dev: ENA communication layer struct
900 void ena_com_destroy_interrupt_moderation(struct ena_com_dev *ena_dev);
902 /* ena_com_interrupt_moderation_supported - Return if interrupt moderation
903 * capability is supported by the device.
905 * @return - supported or not.
907 bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
909 /* ena_com_config_default_interrupt_moderation_table - Restore the interrupt
910 * moderation table back to the default parameters.
911 * @ena_dev: ENA communication layer struct
913 void ena_com_config_default_interrupt_moderation_table(struct ena_com_dev *ena_dev);
915 /* ena_com_update_nonadaptive_moderation_interval_tx - Update the
916 * non-adaptive interval in Tx direction.
917 * @ena_dev: ENA communication layer struct
918 * @tx_coalesce_usecs: Interval in usec.
920 * @return - 0 on success, negative value on failure.
922 int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
923 u32 tx_coalesce_usecs);
925 /* ena_com_update_nonadaptive_moderation_interval_rx - Update the
926 * non-adaptive interval in Rx direction.
927 * @ena_dev: ENA communication layer struct
928 * @rx_coalesce_usecs: Interval in usec.
930 * @return - 0 on success, negative value on failure.
932 int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
933 u32 rx_coalesce_usecs);
935 /* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
936 * non-adaptive interval in Tx direction.
937 * @ena_dev: ENA communication layer struct
939 * @return - interval in usec
941 unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
943 /* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
944 * non-adaptive interval in Rx direction.
945 * @ena_dev: ENA communication layer struct
947 * @return - interval in usec
949 unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
951 /* ena_com_init_intr_moderation_entry - Update a single entry in the interrupt
953 * @ena_dev: ENA communication layer struct
954 * @level: Interrupt moderation table level
955 * @entry: Entry value
957 * Update a single entry in the interrupt moderation table.
959 void ena_com_init_intr_moderation_entry(struct ena_com_dev *ena_dev,
960 enum ena_intr_moder_level level,
961 struct ena_intr_moder_entry *entry);
963 /* ena_com_get_intr_moderation_entry - Init ena_intr_moder_entry.
964 * @ena_dev: ENA communication layer struct
965 * @level: Interrupt moderation table level
966 * @entry: Entry to fill.
968 * Initialize the entry according to the adaptive interrupt moderation table.
970 void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
971 enum ena_intr_moder_level level,
972 struct ena_intr_moder_entry *entry);
974 /* ena_com_config_dev_mode - Configure the placement policy of the device.
975 * @ena_dev: ENA communication layer struct
976 * @llq_features: LLQ feature descriptor, retrieve via
977 * ena_com_get_dev_attr_feat.
978 * @ena_llq_config: The default driver LLQ parameters configurations
980 int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
981 struct ena_admin_feature_llq_desc *llq_features,
982 struct ena_llq_configurations *llq_default_config);
984 static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
986 return ena_dev->adaptive_coalescing;
989 static inline void ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
991 ena_dev->adaptive_coalescing = true;
994 static inline void ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
996 ena_dev->adaptive_coalescing = false;
999 /* ena_com_calculate_interrupt_delay - Calculate new interrupt delay
1000 * @ena_dev: ENA communication layer struct
1001 * @pkts: Number of packets since the last update
1002 * @bytes: Number of bytes received since the last update.
1003 * @smoothed_interval: Returned interval
1004 * @moder_tbl_idx: Current table level as input update new level as return
1007 static inline void ena_com_calculate_interrupt_delay(struct ena_com_dev *ena_dev,
1010 unsigned int *smoothed_interval,
1011 unsigned int *moder_tbl_idx)
1013 enum ena_intr_moder_level curr_moder_idx, new_moder_idx;
1014 struct ena_intr_moder_entry *curr_moder_entry;
1015 struct ena_intr_moder_entry *pred_moder_entry;
1016 struct ena_intr_moder_entry *new_moder_entry;
1017 struct ena_intr_moder_entry *intr_moder_tbl = ena_dev->intr_moder_tbl;
1018 unsigned int interval;
1020 /* We apply adaptive moderation on Rx path only.
1021 * Tx uses static interrupt moderation.
1023 if (!pkts || !bytes)
1024 /* Tx interrupt, or spurious interrupt,
1025 * in both cases we just use same delay values
1029 curr_moder_idx = (enum ena_intr_moder_level)(*moder_tbl_idx);
1030 if (unlikely(curr_moder_idx >= ENA_INTR_MAX_NUM_OF_LEVELS)) {
1031 pr_err("Wrong moderation index %u\n", curr_moder_idx);
1035 curr_moder_entry = &intr_moder_tbl[curr_moder_idx];
1036 new_moder_idx = curr_moder_idx;
1038 if (curr_moder_idx == ENA_INTR_MODER_LOWEST) {
1039 if ((pkts > curr_moder_entry->pkts_per_interval) ||
1040 (bytes > curr_moder_entry->bytes_per_interval))
1042 (enum ena_intr_moder_level)(curr_moder_idx + ENA_INTR_MODER_LEVEL_STRIDE);
1044 pred_moder_entry = &intr_moder_tbl[curr_moder_idx - ENA_INTR_MODER_LEVEL_STRIDE];
1046 if ((pkts <= pred_moder_entry->pkts_per_interval) ||
1047 (bytes <= pred_moder_entry->bytes_per_interval))
1049 (enum ena_intr_moder_level)(curr_moder_idx - ENA_INTR_MODER_LEVEL_STRIDE);
1050 else if ((pkts > curr_moder_entry->pkts_per_interval) ||
1051 (bytes > curr_moder_entry->bytes_per_interval)) {
1052 if (curr_moder_idx != ENA_INTR_MODER_HIGHEST)
1054 (enum ena_intr_moder_level)(curr_moder_idx + ENA_INTR_MODER_LEVEL_STRIDE);
1057 new_moder_entry = &intr_moder_tbl[new_moder_idx];
1059 interval = new_moder_entry->intr_moder_interval;
1060 *smoothed_interval = (
1061 (interval * ENA_INTR_DELAY_NEW_VALUE_WEIGHT +
1062 ENA_INTR_DELAY_OLD_VALUE_WEIGHT * (*smoothed_interval)) + 5) /
1065 *moder_tbl_idx = new_moder_idx;
1068 /* ena_com_update_intr_reg - Prepare interrupt register
1069 * @intr_reg: interrupt register to update.
1070 * @rx_delay_interval: Rx interval in usecs
1071 * @tx_delay_interval: Tx interval in usecs
1072 * @unmask: unask enable/disable
1074 * Prepare interrupt update register with the supplied parameters.
1076 static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
1077 u32 rx_delay_interval,
1078 u32 tx_delay_interval,
1081 intr_reg->intr_control = 0;
1082 intr_reg->intr_control |= rx_delay_interval &
1083 ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
1085 intr_reg->intr_control |=
1086 (tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
1087 & ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK;
1090 intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
1093 static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
1095 u16 size, buffers_num;
1098 size = bounce_buf_ctrl->buffer_size;
1099 buffers_num = bounce_buf_ctrl->buffers_num;
1101 buf = bounce_buf_ctrl->base_buffer +
1102 (bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
1104 prefetchw(bounce_buf_ctrl->base_buffer +
1105 (bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
1110 #endif /* !(ENA_COM) */