drivers/net/ethernet/mellanox/mlx5/core/steering/hws/action_ste_pool.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/action_ste_pool.c

Extension

.c

Size

12557 bytes

Lines

468

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• internal.h

Detected Declarations

• function hws_pool_opt_to_str
• function hws_action_ste_table_create_pool
• function hws_action_ste_table_create_single_rtc
• function hws_action_ste_table_create_rtcs
• function hws_action_ste_table_destroy_rtcs
• function hws_action_ste_table_create_stc
• function hws_action_ste_table_alloc
• function hws_action_ste_table_destroy
• function hws_action_ste_pool_element_init
• function hws_action_ste_pool_element_destroy
• function hws_action_ste_pool_init
• function hws_action_ste_pool_destroy
• function hws_action_ste_pool_element_collect_stale
• function list_for_each_entry_safe
• function hws_action_ste_table_cleanup_list
• function hws_action_ste_pool_cleanup
• function mlx5hws_action_ste_pool_init
• function mlx5hws_action_ste_pool_uninit
• function hws_action_ste_choose_elem
• function hws_action_ste_table_chunk_alloc
• function mlx5hws_action_ste_chunk_alloc
• function mlx5hws_action_ste_chunk_free

Annotated Snippet

if (!hws_action_ste_table_chunk_alloc(action_tbl, chunk)) {
			found = true;
			break;
		}
	}

	if (!found) {
		action_tbl = hws_action_ste_table_alloc(elem);
		if (IS_ERR(action_tbl)) {
			err = PTR_ERR(action_tbl);
			goto out;
		}

		err = hws_action_ste_table_chunk_alloc(action_tbl, chunk);
		if (err)
			goto out;
	}

	if (mlx5hws_pool_empty(action_tbl->pool))
		list_move(&action_tbl->list_node, &elem->full);

	err = 0;

out:
	mutex_unlock(&pool->lock);

	return err;
}

void mlx5hws_action_ste_chunk_free(struct mlx5hws_action_ste_chunk *chunk)
{
	struct mutex *lock = &chunk->action_tbl->parent_elem->parent_pool->lock;

	mlx5hws_dbg(chunk->action_tbl->pool->ctx,
		    "Freeing action STEs offset %d order %d\n",
		    chunk->ste.offset, chunk->ste.order);

	mutex_lock(lock);
	mlx5hws_pool_chunk_free(chunk->action_tbl->pool, &chunk->ste);
	chunk->action_tbl->last_used = jiffies;
	list_move(&chunk->action_tbl->list_node,
		  &chunk->action_tbl->parent_elem->available);
	mutex_unlock(lock);
}

Annotation

• Immediate include surface: `internal.h`.
• Detected declarations: `function hws_pool_opt_to_str`, `function hws_action_ste_table_create_pool`, `function hws_action_ste_table_create_single_rtc`, `function hws_action_ste_table_create_rtcs`, `function hws_action_ste_table_destroy_rtcs`, `function hws_action_ste_table_create_stc`, `function hws_action_ste_table_alloc`, `function hws_action_ste_table_destroy`, `function hws_action_ste_pool_element_init`, `function hws_action_ste_pool_element_destroy`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.