drivers/scsi/qedi/qedi_fw_api.c

Source file repositories/reference/linux-study-clean/drivers/scsi/qedi/qedi_fw_api.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/qedi/qedi_fw_api.c
Extension
.c
Size
26422 bytes
Lines
803
Domain
Driver Families
Bucket
drivers/scsi
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.

Dependency Surface

Detected Declarations

Annotated Snippet

if (task_params->tx_io_size) {
			buf_size = calc_rw_task_size(task_params, task_type,
						     sgl_task_params,
						     dif_task_params);

			if (scsi_is_slow_sgl(sgl_task_params->num_sges,
					     sgl_task_params->small_mid_sge))
				num_sges = ISCSI_WQE_NUM_SGES_SLOWIO;
			else
				num_sges = min(sgl_task_params->num_sges,
					       (u16)SCSI_NUM_SGES_SLOW_SGL_THR);
		}

		SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
			  num_sges);
		SET_FIELD(task_params->sqe->contlen_cdbsize, ISCSI_WQE_CONT_LEN,
			  buf_size);

		if (GET_FIELD(pdu_header->hdr_second_dword,
			      ISCSI_CMD_HDR_TOTAL_AHS_LEN))
			SET_FIELD(task_params->sqe->contlen_cdbsize,
				  ISCSI_WQE_CDB_SIZE,
				  cmd_params->extended_cdb_sge.sge_len);
	}
		break;
	case ISCSI_TASK_TYPE_INITIATOR_READ:
		SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
			  ISCSI_WQE_TYPE_NORMAL);

		if (GET_FIELD(pdu_header->hdr_second_dword,
			      ISCSI_CMD_HDR_TOTAL_AHS_LEN))
			SET_FIELD(task_params->sqe->contlen_cdbsize,
				  ISCSI_WQE_CDB_SIZE,
				  cmd_params->extended_cdb_sge.sge_len);
		break;
	case ISCSI_TASK_TYPE_LOGIN_RESPONSE:
	case ISCSI_TASK_TYPE_MIDPATH:
	{
		bool advance_statsn = true;

		if (task_type == ISCSI_TASK_TYPE_LOGIN_RESPONSE)
			SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
				  ISCSI_WQE_TYPE_LOGIN);
		else
			SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
				  ISCSI_WQE_TYPE_MIDDLE_PATH);

		if (task_type == ISCSI_TASK_TYPE_MIDPATH) {
			u8 opcode = GET_FIELD(pdu_header->hdr_first_byte,
					      ISCSI_COMMON_HDR_OPCODE);

			if (opcode != ISCSI_OPCODE_TEXT_RESPONSE &&
			    (opcode != ISCSI_OPCODE_NOP_IN ||
			    pdu_header->itt == ISCSI_TTT_ALL_ONES))
				advance_statsn = false;
		}

		SET_FIELD(task_params->sqe->flags, ISCSI_WQE_RESPONSE,
			  advance_statsn ? 1 : 0);

		if (task_params->tx_io_size) {
			SET_FIELD(task_params->sqe->contlen_cdbsize,
				  ISCSI_WQE_CONT_LEN, task_params->tx_io_size);

		if (scsi_is_slow_sgl(sgl_task_params->num_sges,
				     sgl_task_params->small_mid_sge))
			SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
				  ISCSI_WQE_NUM_SGES_SLOWIO);
		else
			SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
				  min(sgl_task_params->num_sges,
				      (u16)SCSI_NUM_SGES_SLOW_SGL_THR));
		}
	}
		break;
	default:
		break;
	}
}

static void init_default_iscsi_task(struct iscsi_task_params *task_params,
				    struct data_hdr *pdu_header,
				    enum iscsi_task_type task_type)
{
	struct iscsi_task_context *context;
	u32 val;
	u16 index;
	u8 val_byte;

	context = task_params->context;

Annotation

Implementation Notes