Quelle ena_com.h
Sprache: C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright 2015 - 2020 Amazon . com , Inc . or its affiliates . All rights reserved .
*/
#ifndef ENA_COM
#define ENA_COM
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>
#include <linux/io.h>
#include <linux/prefetch.h>
#include <linux/sched.h>
#include <linux/sizes.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/netdevice.h>
#include "ena_common_defs.h"
#include "ena_admin_defs.h"
#include "ena_eth_io_defs.h"
#include "ena_regs_defs.h"
#undef pr_fmt
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define ENA_MAX_NUM_IO_QUEUES 128 U
/* We need to queues for each IO (on for Tx and one for Rx) */
#define ENA_TOTAL_NUM_QUEUES (2 * (ENA_MAX_NUM_IO_QUEUES))
#define ENA_MAX_HANDLERS 256
#define ENA_MAX_PHYS_ADDR_SIZE_BITS 48
/* Unit in usec */
#define ENA_REG_READ_TIMEOUT 200000
#define ADMIN_SQ_SIZE(depth) ((depth) * sizeof (struct ena_admin_aq_entry))
#define ADMIN_CQ_SIZE(depth) ((depth) * sizeof (struct ena_admin_acq_entry))
#define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof (struct ena_admin_aenq_entry))
#define ENA_CUSTOMER_METRICS_BUFFER_SIZE 512
/*****************************************************************************/
/*****************************************************************************/
/* ENA adaptive interrupt moderation settings */
#define ENA_INTR_INITIAL_TX_INTERVAL_USECS 64
#define ENA_INTR_INITIAL_RX_INTERVAL_USECS 20
#define ENA_DEFAULT_INTR_DELAY_RESOLUTION 1
#define ENA_HASH_KEY_SIZE 40
#define ENA_HW_HINTS_NO_TIMEOUT 0 xFFFF
#define ENA_FEATURE_MAX_QUEUE_EXT_VER 1
struct ena_llq_configurations {
enum ena_admin_llq_header_location llq_header_location;
enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
u16 llq_ring_entry_size_value;
};
enum queue_direction {
ENA_COM_IO_QUEUE_DIRECTION_TX,
ENA_COM_IO_QUEUE_DIRECTION_RX
};
struct ena_com_buf {
dma_addr_t paddr; /**< Buffer physical address */
u16 len; /**< Buffer length in bytes */
};
struct ena_com_rx_buf_info {
u16 len;
u16 req_id;
};
struct ena_com_io_desc_addr {
u8 __iomem *pbuf_dev_addr; /* LLQ address */
u8 *virt_addr;
dma_addr_t phys_addr;
};
struct ena_com_tx_meta {
u16 mss;
u16 l3_hdr_len;
u16 l3_hdr_offset;
u16 l4_hdr_len; /* In words */
};
struct ena_com_llq_info {
u16 header_location_ctrl;
u16 desc_stride_ctrl;
u16 desc_list_entry_size_ctrl;
u16 desc_list_entry_size;
u16 descs_num_before_header;
u16 descs_per_entry;
u16 max_entries_in_tx_burst;
bool disable_meta_caching;
};
struct ena_com_io_cq {
struct ena_com_io_desc_addr cdesc_addr;
/* Interrupt unmask register */
u32 __iomem *unmask_reg;
/* numa configuration register (for TPH) */
u32 __iomem *numa_node_cfg_reg;
/* The value to write to the above register to unmask
* the interrupt of this queue
*/
u32 msix_vector ____cacheline_aligned;
enum queue_direction direction;
/* holds the number of cdesc of the current packet */
u16 cur_rx_pkt_cdesc_count;
/* save the first cdesc idx of the current packet */
u16 cur_rx_pkt_cdesc_start_idx;
u16 q_depth;
/* Caller qid */
u16 qid;
/* Device queue index */
u16 idx;
u16 head;
u8 phase;
u8 cdesc_entry_size_in_bytes;
} ____cacheline_aligned;
struct ena_com_io_bounce_buffer_control {
u8 *base_buffer;
u16 next_to_use;
u16 buffer_size;
u16 buffers_num; /* Must be a power of 2 */
};
/* This struct is to keep tracking the current location of the next llq entry */
struct ena_com_llq_pkt_ctrl {
u8 *curr_bounce_buf;
u16 idx;
u16 descs_left_in_line;
};
struct ena_com_io_sq {
struct ena_com_io_desc_addr desc_addr;
u32 __iomem *db_addr;
enum queue_direction direction;
enum ena_admin_placement_policy_type mem_queue_type;
bool disable_meta_caching;
u32 msix_vector;
struct ena_com_tx_meta cached_tx_meta;
struct ena_com_llq_info llq_info;
struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
u16 q_depth;
u16 qid;
u16 idx;
u16 tail;
u16 next_to_comp;
u16 llq_last_copy_tail;
u32 tx_max_header_size;
u8 phase;
u8 desc_entry_size;
u8 dma_addr_bits;
u16 entries_in_tx_burst_left;
} ____cacheline_aligned;
struct ena_com_admin_cq {
struct ena_admin_acq_entry *entries;
dma_addr_t dma_addr;
u16 head;
u8 phase;
};
struct ena_com_admin_sq {
struct ena_admin_aq_entry *entries;
dma_addr_t dma_addr;
u32 __iomem *db_addr;
u16 head;
u16 tail;
u8 phase;
};
struct ena_com_stats_admin {
u64 aborted_cmd;
u64 submitted_cmd;
u64 completed_cmd;
u64 out_of_space;
u64 no_completion;
};
struct ena_com_stats_phc {
u64 phc_cnt;
u64 phc_exp;
u64 phc_skp;
u64 phc_err_dv;
u64 phc_err_ts;
};
struct ena_com_admin_queue {
void *q_dmadev;
struct ena_com_dev *ena_dev;
spinlock_t q_lock; /* spinlock for the admin queue */
struct ena_comp_ctx *comp_ctx;
u32 completion_timeout;
u16 q_depth;
struct ena_com_admin_cq cq;
struct ena_com_admin_sq sq;
/* Indicate if the admin queue should poll for completion */
bool polling;
u16 curr_cmd_id;
/* Indicate that the ena was initialized and can
* process new admin commands
*/
bool running_state;
/* Count the number of outstanding admin commands */
atomic_t outstanding_cmds;
struct ena_com_stats_admin stats;
};
struct ena_aenq_handlers;
struct ena_com_aenq {
u16 head;
u8 phase;
struct ena_admin_aenq_entry *entries;
dma_addr_t dma_addr;
u16 q_depth;
struct ena_aenq_handlers *aenq_handlers;
};
struct ena_com_mmio_read {
struct ena_admin_ena_mmio_req_read_less_resp *read_resp;
dma_addr_t read_resp_dma_addr;
u32 reg_read_to; /* in us */
u16 seq_num;
bool readless_supported;
/* spin lock to ensure a single outstanding read */
spinlock_t lock;
};
/* PTP hardware clock (PHC) MMIO read data info */
struct ena_com_phc_info {
/* Internal PHC statistics */
struct ena_com_stats_phc stats;
/* PHC shared memory - virtual address */
struct ena_admin_phc_resp *virt_addr;
/* System time of last PHC request */
ktime_t system_time;
/* Spin lock to ensure a single outstanding PHC read */
spinlock_t lock;
/* PHC doorbell address as an offset to PCIe MMIO REG BAR */
u32 doorbell_offset;
/* Shared memory read expire timeout (usec)
* Max time for valid PHC retrieval , passing this threshold will fail
* the get time request and block new PHC requests for block_timeout_usec
* in order to prevent floods on busy device
*/
u32 expire_timeout_usec;
/* Shared memory read abort timeout (usec)
* PHC requests block period , blocking starts once PHC request expired
* in order to prevent floods on busy device ,
* any PHC requests during block period will be skipped
*/
u32 block_timeout_usec;
/* PHC shared memory - physical address */
dma_addr_t phys_addr;
/* Request id sent to the device */
u16 req_id;
/* True if PHC is active in the device */
bool active;
};
struct ena_rss {
/* Indirect table */
u16 *host_rss_ind_tbl;
struct ena_admin_rss_ind_table_entry *rss_ind_tbl;
dma_addr_t rss_ind_tbl_dma_addr;
u16 tbl_log_size;
/* Hash key */
enum ena_admin_hash_functions hash_func;
struct ena_admin_feature_rss_flow_hash_control *hash_key;
dma_addr_t hash_key_dma_addr;
u32 hash_init_val;
/* Flow Control */
struct ena_admin_feature_rss_hash_control *hash_ctrl;
dma_addr_t hash_ctrl_dma_addr;
};
struct ena_customer_metrics {
/* in correlation with ENA_ADMIN_CUSTOMER_METRICS_SUPPORT_MASK
* and ena_admin_customer_metrics_id
*/
u64 supported_metrics;
dma_addr_t buffer_dma_addr;
void *buffer_virt_addr;
u32 buffer_len;
};
struct ena_host_attribute {
/* Debug area */
u8 *debug_area_virt_addr;
dma_addr_t debug_area_dma_addr;
u32 debug_area_size;
/* Host information */
struct ena_admin_host_info *host_info;
dma_addr_t host_info_dma_addr;
};
/* Each ena_dev is a PCI function. */
struct ena_com_dev {
struct ena_com_admin_queue admin_queue;
struct ena_com_aenq aenq;
struct ena_com_io_cq io_cq_queues[ENA_TOTAL_NUM_QUEUES];
struct ena_com_io_sq io_sq_queues[ENA_TOTAL_NUM_QUEUES];
u8 __iomem *reg_bar;
void __iomem *mem_bar;
void *dmadev;
struct net_device *net_device;
enum ena_admin_placement_policy_type tx_mem_queue_type;
u32 tx_max_header_size;
u16 stats_func; /* Selected function for extended statistic dump */
u16 stats_queue; /* Selected queue for extended statistic dump */
u32 ena_min_poll_delay_us;
struct ena_com_mmio_read mmio_read;
struct ena_com_phc_info phc;
struct ena_rss rss;
u32 supported_features;
u32 capabilities;
u32 dma_addr_bits;
struct ena_host_attribute host_attr;
bool adaptive_coalescing;
u16 intr_delay_resolution;
/* interrupt moderation intervals are in usec divided by
* intr_delay_resolution , which is supplied by the device .
*/
u32 intr_moder_tx_interval;
u32 intr_moder_rx_interval;
struct ena_intr_moder_entry *intr_moder_tbl;
struct ena_com_llq_info llq_info;
struct ena_customer_metrics customer_metrics;
};
struct ena_com_dev_get_features_ctx {
struct ena_admin_queue_feature_desc max_queues;
struct ena_admin_queue_ext_feature_desc max_queue_ext;
struct ena_admin_device_attr_feature_desc dev_attr;
struct ena_admin_feature_aenq_desc aenq;
struct ena_admin_feature_offload_desc offload;
struct ena_admin_ena_hw_hints hw_hints;
struct ena_admin_feature_llq_desc llq;
};
struct ena_com_create_io_ctx {
enum ena_admin_placement_policy_type mem_queue_type;
enum queue_direction direction;
int numa_node;
u32 msix_vector;
u16 queue_size;
u16 qid;
};
typedef void (*ena_aenq_handler)(void *data,
struct ena_admin_aenq_entry *aenq_e);
/* Holds aenq handlers. Indexed by AENQ event group */
struct ena_aenq_handlers {
ena_aenq_handler handlers[ENA_MAX_HANDLERS];
ena_aenq_handler unimplemented_handler;
};
/*****************************************************************************/
/*****************************************************************************/
/* ena_com_mmio_reg_read_request_init - Init the mmio reg read mechanism
* @ ena_dev : ENA communication layer struct
*
* Initialize the register read mechanism .
*
* @ note : This method must be the first stage in the initialization sequence .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev);
/* ena_com_phc_init - Allocate and initialize PHC feature
* @ ena_dev : ENA communication layer struct
* @ note : This method assumes PHC is supported by the device
* @ return - 0 on success , negative value on failure
*/
int ena_com_phc_init(struct ena_com_dev *ena_dev);
/* ena_com_phc_supported - Return if PHC feature is supported by the device
* @ ena_dev : ENA communication layer struct
* @ note : This method must be called after getting supported features
* @ return - supported or not
*/
bool ena_com_phc_supported(struct ena_com_dev *ena_dev);
/* ena_com_phc_config - Configure PHC feature
* @ ena_dev : ENA communication layer struct
* Configure PHC feature in driver and device
* @ note : This method assumes PHC is supported by the device
* @ return - 0 on success , negative value on failure
*/
int ena_com_phc_config(struct ena_com_dev *ena_dev);
/* ena_com_phc_destroy - Destroy PHC feature
* @ ena_dev : ENA communication layer struct
*/
void ena_com_phc_destroy(struct ena_com_dev *ena_dev);
/* ena_com_phc_get_timestamp - Retrieve PHC timestamp
* @ ena_dev : ENA communication layer struct
* @ timestamp : Retrieved PHC timestamp
* @ return - 0 on success , negative value on failure
*/
int ena_com_phc_get_timestamp(struct ena_com_dev *ena_dev, u64 *timestamp);
/* ena_com_set_mmio_read_mode - Enable/disable the indirect mmio reg read mechanism
* @ ena_dev : ENA communication layer struct
* @ readless_supported : readless mode ( enable / disable )
*/
void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev,
bool readless_supported);
/* ena_com_mmio_reg_read_request_write_dev_addr - Write the mmio reg read return
* value physical address .
* @ ena_dev : ENA communication layer struct
*/
void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev);
/* ena_com_mmio_reg_read_request_destroy - Destroy the mmio reg read mechanism
* @ ena_dev : ENA communication layer struct
*/
void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
/* ena_com_admin_init - Init the admin and the async queues
* @ ena_dev : ENA communication layer struct
* @ aenq_handlers : Those handlers to be called upon event .
*
* Initialize the admin submission and completion queues .
* Initialize the asynchronous events notification queues .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_admin_init(struct ena_com_dev *ena_dev,
struct ena_aenq_handlers *aenq_handlers);
/* ena_com_admin_destroy - Destroy the admin and the async events queues.
* @ ena_dev : ENA communication layer struct
*
* @ note : Before calling this method , the caller must validate that the device
* won ' t send any additional admin completions / aenq .
* To achieve that , a FLR is recommended .
*/
void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
/* ena_com_dev_reset - Perform device FLR to the device.
* @ ena_dev : ENA communication layer struct
* @ reset_reason : Specify what is the trigger for the reset in case of an error .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_dev_reset(struct ena_com_dev *ena_dev,
enum ena_regs_reset_reason_types reset_reason);
/* ena_com_create_io_queue - Create io queue.
* @ ena_dev : ENA communication layer struct
* @ ctx - create context structure
*
* Create the submission and the completion queues .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
struct ena_com_create_io_ctx *ctx);
/* ena_com_destroy_io_queue - Destroy IO queue with the queue id - qid.
* @ ena_dev : ENA communication layer struct
* @ qid - the caller virtual queue id .
*/
void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid);
/* ena_com_get_io_handlers - Return the io queue handlers
* @ ena_dev : ENA communication layer struct
* @ qid - the caller virtual queue id .
* @ io_sq - IO submission queue handler
* @ io_cq - IO completion queue handler .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
struct ena_com_io_sq **io_sq,
struct ena_com_io_cq **io_cq);
/* ena_com_admin_aenq_enable - ENAble asynchronous event notifications
* @ ena_dev : ENA communication layer struct
*
* After this method , aenq event can be received via AENQ .
*/
void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev);
/* ena_com_set_admin_running_state - Set the state of the admin queue
* @ ena_dev : ENA communication layer struct
*
* Change the state of the admin queue ( enable / disable )
*/
void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state);
/* ena_com_get_admin_running_state - Get the admin queue state
* @ ena_dev : ENA communication layer struct
*
* Retrieve the state of the admin queue ( enable / disable )
*
* @ return - current polling mode ( enable / disable )
*/
bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
/* ena_com_set_admin_polling_mode - Set the admin completion queue polling mode
* @ ena_dev : ENA communication layer struct
* @ polling : ENAble / Disable polling mode
*
* Set the admin completion mode .
*/
void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
/* ena_com_admin_q_comp_intr_handler - admin queue interrupt handler
* @ ena_dev : ENA communication layer struct
*
* This method goes over the admin completion queue and wakes up all the pending
* threads that wait on the commands wait event .
*
* @ note : Should be called after MSI - X interrupt .
*/
void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev);
/* ena_com_aenq_intr_handler - AENQ interrupt handler
* @ ena_dev : ENA communication layer struct
*
* This method goes over the async event notification queue and calls the proper
* aenq handler .
*/
void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data);
/* ena_com_abort_admin_commands - Abort all the outstanding admin commands.
* @ ena_dev : ENA communication layer struct
*
* This method aborts all the outstanding admin commands .
* The caller should then call ena_com_wait_for_abort_completion to make sure
* all the commands were completed .
*/
void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev);
/* ena_com_wait_for_abort_completion - Wait for admin commands abort.
* @ ena_dev : ENA communication layer struct
*
* This method waits until all the outstanding admin commands are completed .
*/
void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev);
/* ena_com_validate_version - Validate the device parameters
* @ ena_dev : ENA communication layer struct
*
* This method verifies the device parameters are the same as the saved
* parameters in ena_dev .
* This method is useful after device reset , to validate the device mac address
* and the device offloads are the same as before the reset .
*
* @ return - 0 on success negative value otherwise .
*/
int ena_com_validate_version(struct ena_com_dev *ena_dev);
/* ena_com_get_link_params - Retrieve physical link parameters.
* @ ena_dev : ENA communication layer struct
* @ resp : Link parameters
*
* Retrieve the physical link parameters ,
* like speed , auto - negotiation and full duplex support .
*
* @ return - 0 on Success negative value otherwise .
*/
int ena_com_get_link_params(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *resp);
/* ena_com_get_dma_width - Retrieve physical dma address width the device
* supports .
* @ ena_dev : ENA communication layer struct
*
* Retrieve the maximum physical address bits the device can handle .
*
* @ return : > 0 on Success and negative value otherwise .
*/
int ena_com_get_dma_width(struct ena_com_dev *ena_dev);
/* ena_com_set_aenq_config - Set aenq groups configurations
* @ ena_dev : ENA communication layer struct
* @ groups flag : bit fields flags of enum ena_admin_aenq_group .
*
* Configure which aenq event group the driver would like to receive .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag);
/* ena_com_get_dev_attr_feat - Get device features
* @ ena_dev : ENA communication layer struct
* @ get_feat_ctx : returned context that contain the get features .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
struct ena_com_dev_get_features_ctx *get_feat_ctx);
/* ena_com_get_eni_stats - Get extended network interface statistics
* @ ena_dev : ENA communication layer struct
* @ stats : stats return value
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
struct ena_admin_eni_stats *stats);
/* ena_com_get_ena_srd_info - Get ENA SRD network interface statistics
* @ ena_dev : ENA communication layer struct
* @ info : ena srd stats and flags
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_ena_srd_info(struct ena_com_dev *ena_dev,
struct ena_admin_ena_srd_info *info);
/* ena_com_get_customer_metrics - Get customer metrics for network interface
* @ ena_dev : ENA communication layer struct
* @ buffer : buffer for returned customer metrics
* @ len : size of the buffer
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_customer_metrics(struct ena_com_dev *ena_dev, char *buffer, u32 len);
/* ena_com_set_dev_mtu - Configure the device mtu.
* @ ena_dev : ENA communication layer struct
* @ mtu : mtu value
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, u32 mtu);
/* ena_com_rss_init - Init RSS
* @ ena_dev : ENA communication layer struct
* @ log_size : indirection log size
*
* Allocate RSS / RFS resources .
* The caller then can configure rss using ena_com_set_hash_function ,
* ena_com_set_hash_ctrl and ena_com_indirect_table_set .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size);
/* ena_com_rss_destroy - Destroy rss
* @ ena_dev : ENA communication layer struct
*
* Free all the RSS / RFS resources .
*/
void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
/* ena_com_get_current_hash_function - Get RSS hash function
* @ ena_dev : ENA communication layer struct
*
* Return the current hash function .
* @ return : 0 or one of the ena_admin_hash_functions values .
*/
int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);
/* ena_com_fill_hash_function - Fill RSS hash function
* @ ena_dev : ENA communication layer struct
* @ func : The hash function ( Toeplitz or crc )
* @ key : Hash key ( for toeplitz hash )
* @ key_len : key length ( max length 10 DW )
* @ init_val : initial value for the hash function
*
* Fill the ena_dev resources with the desire hash function , hash key , key_len
* and key initial value ( if needed by the hash function ) .
* To flush the key into the device the caller should call
* ena_com_set_hash_function .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
enum ena_admin_hash_functions func,
const u8 *key, u16 key_len, u32 init_val);
/* ena_com_set_hash_function - Flush the hash function and it dependencies to
* the device .
* @ ena_dev : ENA communication layer struct
*
* Flush the hash function and it dependencies ( key , key length and
* initial value ) if needed .
*
* @ note : Prior to this method the caller should call ena_com_fill_hash_function
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
/* ena_com_get_hash_function - Retrieve the hash function from the device.
* @ ena_dev : ENA communication layer struct
* @ func : hash function
*
* Retrieve the hash function from the device .
*
* @ note : If the caller called ena_com_fill_hash_function but didn ' t flush
* it to the device , the new configuration will be lost .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
enum ena_admin_hash_functions *func);
/* ena_com_get_hash_key - Retrieve the hash key
* @ ena_dev : ENA communication layer struct
* @ key : hash key
*
* Retrieve the hash key .
*
* @ note : If the caller called ena_com_fill_hash_key but didn ' t flush
* it to the device , the new configuration will be lost .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
/* ena_com_fill_hash_ctrl - Fill RSS hash control
* @ ena_dev : ENA communication layer struct .
* @ proto : The protocol to configure .
* @ hash_fields : bit mask of ena_admin_flow_hash_fields
*
* Fill the ena_dev resources with the desire hash control ( the ethernet
* fields that take part of the hash ) for a specific protocol .
* To flush the hash control to the device , the caller should call
* ena_com_set_hash_ctrl .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
enum ena_admin_flow_hash_proto proto,
u16 hash_fields);
/* ena_com_set_hash_ctrl - Flush the hash control resources to the device.
* @ ena_dev : ENA communication layer struct
*
* Flush the hash control ( the ethernet fields that take part of the hash )
*
* @ note : Prior to this method the caller should call ena_com_fill_hash_ctrl .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev);
/* ena_com_get_hash_ctrl - Retrieve the hash control from the device.
* @ ena_dev : ENA communication layer struct
* @ proto : The protocol to retrieve .
* @ fields : bit mask of ena_admin_flow_hash_fields .
*
* Retrieve the hash control from the device .
*
* @ note : If the caller called ena_com_fill_hash_ctrl but didn ' t flush
* it to the device , the new configuration will be lost .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
enum ena_admin_flow_hash_proto proto,
u16 *fields);
/* ena_com_set_default_hash_ctrl - Set the hash control to a default
* configuration .
* @ ena_dev : ENA communication layer struct
*
* Fill the ena_dev resources with the default hash control configuration .
* To flush the hash control to the device , the caller should call
* ena_com_set_hash_ctrl .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev);
/* ena_com_indirect_table_fill_entry - Fill a single entry in the RSS
* indirection table
* @ ena_dev : ENA communication layer struct .
* @ entry_idx - indirection table entry .
* @ entry_value - redirection value
*
* Fill a single entry of the RSS indirection table in the ena_dev resources .
* To flush the indirection table to the device , the called should call
* ena_com_indirect_table_set .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
u16 entry_idx, u16 entry_value);
/* ena_com_indirect_table_set - Flush the indirection table to the device.
* @ ena_dev : ENA communication layer struct
*
* Flush the indirection hash control to the device .
* Prior to this method the caller should call ena_com_indirect_table_fill_entry
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_indirect_table_set(struct ena_com_dev *ena_dev);
/* ena_com_indirect_table_get - Retrieve the indirection table from the device.
* @ ena_dev : ENA communication layer struct
* @ ind_tbl : indirection table
*
* Retrieve the RSS indirection table from the device .
*
* @ note : If the caller called ena_com_indirect_table_fill_entry but didn ' t flush
* it to the device , the new configuration will be lost .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl);
/* ena_com_allocate_host_info - Allocate host info resources.
* @ ena_dev : ENA communication layer struct
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_allocate_host_info(struct ena_com_dev *ena_dev);
/* ena_com_allocate_debug_area - Allocate debug area.
* @ ena_dev : ENA communication layer struct
* @ debug_area_size - debug area size .
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
u32 debug_area_size);
/* ena_com_allocate_customer_metrics_buffer - Allocate customer metrics resources.
* @ ena_dev : ENA communication layer struct
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_allocate_customer_metrics_buffer(struct ena_com_dev *ena_dev);
/* ena_com_delete_debug_area - Free the debug area resources.
* @ ena_dev : ENA communication layer struct
*
* Free the allocated debug area .
*/
void ena_com_delete_debug_area(struct ena_com_dev *ena_dev);
/* ena_com_delete_host_info - Free the host info resources.
* @ ena_dev : ENA communication layer struct
*
* Free the allocated host info .
*/
void ena_com_delete_host_info(struct ena_com_dev *ena_dev);
/* ena_com_delete_customer_metrics_buffer - Free the customer metrics resources.
* @ ena_dev : ENA communication layer struct
*
* Free the allocated customer metrics area .
*/
void ena_com_delete_customer_metrics_buffer(struct ena_com_dev *ena_dev);
/* ena_com_set_host_attributes - Update the device with the host
* attributes ( debug area and host info ) base address .
* @ ena_dev : ENA communication layer struct
*
* @ return : 0 on Success and negative value otherwise .
*/
int ena_com_set_host_attributes(struct ena_com_dev *ena_dev);
/* ena_com_create_io_cq - Create io completion queue.
* @ ena_dev : ENA communication layer struct
* @ io_cq - io completion queue handler
* Create IO completion queue .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
struct ena_com_io_cq *io_cq);
/* ena_com_destroy_io_cq - Destroy io completion queue.
* @ ena_dev : ENA communication layer struct
* @ io_cq - io completion queue handler
* Destroy IO completion queue .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
struct ena_com_io_cq *io_cq);
/* ena_com_execute_admin_command - Execute admin command
* @ admin_queue : admin queue .
* @ cmd : the admin command to execute .
* @ cmd_size : the command size .
* @ cmd_completion : command completion return value .
* @ cmd_comp_size : command completion size .
* Submit an admin command and then wait until the device returns a
* completion .
* The completion will be copied into cmd_comp .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
struct ena_admin_aq_entry *cmd,
size_t cmd_size,
struct ena_admin_acq_entry *cmd_comp,
size_t cmd_comp_size);
/* ena_com_init_interrupt_moderation - Init interrupt moderation
* @ ena_dev : ENA communication layer struct
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev);
/* ena_com_interrupt_moderation_supported - Return if interrupt moderation
* capability is supported by the device .
*
* @ return - supported or not .
*/
bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev);
/* ena_com_update_nonadaptive_moderation_interval_tx - Update the
* non - adaptive interval in Tx direction .
* @ ena_dev : ENA communication layer struct
* @ tx_coalesce_usecs : Interval in usec .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
u32 tx_coalesce_usecs);
/* ena_com_update_nonadaptive_moderation_interval_rx - Update the
* non - adaptive interval in Rx direction .
* @ ena_dev : ENA communication layer struct
* @ rx_coalesce_usecs : Interval in usec .
*
* @ return - 0 on success , negative value on failure .
*/
int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
u32 rx_coalesce_usecs);
/* ena_com_get_nonadaptive_moderation_interval_tx - Retrieve the
* non - adaptive interval in Tx direction .
* @ ena_dev : ENA communication layer struct
*
* @ return - interval in usec
*/
unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev);
/* ena_com_get_nonadaptive_moderation_interval_rx - Retrieve the
* non - adaptive interval in Rx direction .
* @ ena_dev : ENA communication layer struct
*
* @ return - interval in usec
*/
unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev);
/* ena_com_config_dev_mode - Configure the placement policy of the device.
* @ ena_dev : ENA communication layer struct
* @ llq_features : LLQ feature descriptor , retrieve via
* ena_com_get_dev_attr_feat .
* @ ena_llq_config : The default driver LLQ parameters configurations
*/
int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
struct ena_admin_feature_llq_desc *llq_features,
struct ena_llq_configurations *llq_default_config);
/* ena_com_io_sq_to_ena_dev - Extract ena_com_dev using contained field io_sq.
* @ io_sq : IO submit queue struct
*
* @ return - ena_com_dev struct extracted from io_sq
*/
static inline struct ena_com_dev *ena_com_io_sq_to_ena_dev(struct ena_com_io_sq *io_sq)
{
return container_of(io_sq, struct ena_com_dev, io_sq_queues[io_sq->qid]);
}
/* ena_com_io_cq_to_ena_dev - Extract ena_com_dev using contained field io_cq.
* @ io_sq : IO submit queue struct
*
* @ return - ena_com_dev struct extracted from io_sq
*/
static inline struct ena_com_dev *ena_com_io_cq_to_ena_dev(struct ena_com_io_cq *io_cq)
{
return container_of(io_cq, struct ena_com_dev, io_cq_queues[io_cq->qid]);
}
static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
{
return ena_dev->adaptive_coalescing;
}
static inline void ena_com_enable_adaptive_moderation(struct ena_com_dev *ena_dev)
{
ena_dev->adaptive_coalescing = true ;
}
static inline void ena_com_disable_adaptive_moderation(struct ena_com_dev *ena_dev)
{
ena_dev->adaptive_coalescing = false ;
}
/* ena_com_get_cap - query whether device supports a capability.
* @ ena_dev : ENA communication layer struct
* @ cap_id : enum value representing the capability
*
* @ return - true if capability is supported or false otherwise
*/
static inline bool ena_com_get_cap(struct ena_com_dev *ena_dev,
enum ena_admin_aq_caps_id cap_id)
{
return !!(ena_dev->capabilities & BIT(cap_id));
}
/* ena_com_get_customer_metric_support - query whether device supports a given customer metric.
* @ ena_dev : ENA communication layer struct
* @ metric_id : enum value representing the customer metric
*
* @ return - true if customer metric is supported or false otherwise
*/
static inline bool ena_com_get_customer_metric_support(struct ena_com_dev *ena_dev,
enum ena_admin_customer_metrics_id metric_id)
{
return !!(ena_dev->customer_metrics.supported_metrics & BIT(metric_id));
}
/* ena_com_get_customer_metric_count - return the number of supported customer metrics.
* @ ena_dev : ENA communication layer struct
*
* @ return - the number of supported customer metrics
*/
static inline int ena_com_get_customer_metric_count(struct ena_com_dev *ena_dev)
{
return hweight64(ena_dev->customer_metrics.supported_metrics);
}
/* ena_com_update_intr_reg - Prepare interrupt register
* @ intr_reg : interrupt register to update .
* @ rx_delay_interval : Rx interval in usecs
* @ tx_delay_interval : Tx interval in usecs
* @ unmask : unmask enable / disable
*
* Prepare interrupt update register with the supplied parameters .
*/
static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
u32 rx_delay_interval,
u32 tx_delay_interval,
bool unmask)
{
intr_reg->intr_control = 0 ;
intr_reg->intr_control |= rx_delay_interval &
ENA_ETH_IO_INTR_REG_RX_INTR_DELAY_MASK;
intr_reg->intr_control |=
(tx_delay_interval << ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_SHIFT)
& ENA_ETH_IO_INTR_REG_TX_INTR_DELAY_MASK;
if (unmask)
intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
}
static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
{
u16 size, buffers_num;
u8 *buf;
size = bounce_buf_ctrl->buffer_size;
buffers_num = bounce_buf_ctrl->buffers_num;
buf = bounce_buf_ctrl->base_buffer +
(bounce_buf_ctrl->next_to_use++ & (buffers_num - 1 )) * size;
prefetchw(bounce_buf_ctrl->base_buffer +
(bounce_buf_ctrl->next_to_use & (buffers_num - 1 )) * size);
return buf;
}
#endif /* !(ENA_COM) */
Messung V0.5 in Prozent C=91 H=100 G=95
¤ Dauer der Verarbeitung: 0.23 Sekunden
(vorverarbeitet am 2026-10-02)
¤
*© Formatika GbR, Deutschland
2026-10-10
Neuigkeiten
Aktuelles
Motto des Tages
Open Source Software
Jenseits des Üblichen ....
Besucherstatistik
Statistik
#Sources=1126864
#Domains=1897691