drivers/net/ethernet/qlogic/qed/qed_iscsi.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/qlogic/qed/qed_iscsi.c

Extension

.c

Size

41322 bytes

Lines

1416

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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

• linux/types.h
• asm/byteorder.h
• asm/param.h
• linux/delay.h
• linux/dma-mapping.h
• linux/etherdevice.h
• linux/interrupt.h
• linux/kernel.h
• linux/log2.h
• linux/module.h
• linux/pci.h
• linux/slab.h
• linux/stddef.h
• linux/string.h
• linux/workqueue.h
• linux/errno.h
• linux/list.h
• linux/spinlock.h
• linux/qed/qed_iscsi_if.h
• qed.h
• qed_cxt.h
• qed_dev_api.h
• qed_hsi.h
• qed_hw.h
• qed_int.h
• qed_iro_hsi.h
• qed_iscsi.h
• qed_ll2.h
• qed_mcp.h
• qed_sp.h
• qed_sriov.h
• qed_reg_addr.h

Detected Declarations

• struct qed_iscsi_conn
• struct qed_hash_iscsi_con
• function qed_iscsi_async_event
• function qed_sp_iscsi_func_start
• function qed_sp_iscsi_conn_offload
• function qed_sp_iscsi_conn_update
• function qed_sp_iscsi_mac_update
• function qed_sp_iscsi_conn_terminate
• function qed_sp_iscsi_conn_clear_sq
• function qed_sp_iscsi_func_stop
• function qed_iscsi_setup_connection
• function qed_iscsi_allocate_connection
• function qed_iscsi_acquire_connection
• function qed_iscsi_release_connection
• function qed_iscsi_free_connection
• function qed_iscsi_alloc
• function qed_iscsi_setup
• function qed_iscsi_free
• function _qed_iscsi_get_tstats
• function _qed_iscsi_get_mstats
• function _qed_iscsi_get_ustats
• function _qed_iscsi_get_xstats
• function _qed_iscsi_get_ystats
• function _qed_iscsi_get_pstats
• function qed_iscsi_get_stats
• function qed_fill_iscsi_dev_info
• function qed_register_iscsi_ops
• function hash_for_each_possible
• function qed_iscsi_stop
• function qed_iscsi_start
• function qed_iscsi_acquire_conn
• function qed_iscsi_release_conn
• function qed_iscsi_offload_conn
• function qed_iscsi_update_conn
• function qed_iscsi_clear_conn_sq
• function qed_iscsi_destroy_conn
• function qed_iscsi_stats_context
• function qed_iscsi_stats
• function qed_iscsi_change_mac
• function qed_get_protocol_stats_iscsi
• function qed_put_iscsi_ops
• export qed_get_iscsi_ops
• export qed_put_iscsi_ops

Annotated Snippet

struct qed_iscsi_conn {
	struct list_head list_entry;
	bool free_on_delete;

	u16 conn_id;
	u32 icid;
	u32 fw_cid;

	u8 layer_code;
	u8 offl_flags;
	u8 connect_mode;
	u32 initial_ack;
	dma_addr_t sq_pbl_addr;
	struct qed_chain r2tq;
	struct qed_chain xhq;
	struct qed_chain uhq;

	struct tcp_upload_params *tcp_upload_params_virt_addr;
	dma_addr_t tcp_upload_params_phys_addr;
	struct scsi_terminate_extra_params *queue_cnts_virt_addr;
	dma_addr_t queue_cnts_phys_addr;
	dma_addr_t syn_phy_addr;

	u16 syn_ip_payload_length;
	u8 local_mac[6];
	u8 remote_mac[6];
	u16 vlan_id;
	u16 tcp_flags;
	u8 ip_version;
	u32 remote_ip[4];
	u32 local_ip[4];
	u8 ka_max_probe_cnt;
	u8 dup_ack_theshold;
	u32 rcv_next;
	u32 snd_una;
	u32 snd_next;
	u32 snd_max;
	u32 snd_wnd;
	u32 rcv_wnd;
	u32 snd_wl1;
	u32 cwnd;
	u32 ss_thresh;
	u16 srtt;
	u16 rtt_var;
	u32 ts_recent;
	u32 ts_recent_age;
	u32 total_rt;
	u32 ka_timeout_delta;
	u32 rt_timeout_delta;
	u8 dup_ack_cnt;
	u8 snd_wnd_probe_cnt;
	u8 ka_probe_cnt;
	u8 rt_cnt;
	u32 flow_label;
	u32 ka_timeout;
	u32 ka_interval;
	u32 max_rt_time;
	u32 initial_rcv_wnd;
	u8 ttl;
	u8 tos_or_tc;
	u16 remote_port;
	u16 local_port;
	u16 mss;
	u8 snd_wnd_scale;
	u8 rcv_wnd_scale;
	u16 da_timeout_value;
	u8 ack_frequency;

	u8 update_flag;
	u8 default_cq;
	u32 max_seq_size;
	u32 max_recv_pdu_length;
	u32 max_send_pdu_length;
	u32 first_seq_length;
	u32 exp_stat_sn;
	u32 stat_sn;
	u16 physical_q0;
	u16 physical_q1;
	u8 abortive_dsconnect;
};

static int qed_iscsi_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
				 __le16 echo, union event_ring_data *data,
				 u8 fw_return_code)
{
	if (p_hwfn->p_iscsi_info->event_cb) {
		struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info;

		return p_iscsi->event_cb(p_iscsi->event_context,
					 fw_event_code, data);

Annotation

• Immediate include surface: `linux/types.h`, `asm/byteorder.h`, `asm/param.h`, `linux/delay.h`, `linux/dma-mapping.h`, `linux/etherdevice.h`, `linux/interrupt.h`, `linux/kernel.h`.
• Detected declarations: `struct qed_iscsi_conn`, `struct qed_hash_iscsi_con`, `function qed_iscsi_async_event`, `function qed_sp_iscsi_func_start`, `function qed_sp_iscsi_conn_offload`, `function qed_sp_iscsi_conn_update`, `function qed_sp_iscsi_mac_update`, `function qed_sp_iscsi_conn_terminate`, `function qed_sp_iscsi_conn_clear_sq`, `function qed_sp_iscsi_func_stop`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.