drivers/scsi/bfa/bfad_im.c

Source file repositories/reference/linux-study-clean/drivers/scsi/bfa/bfad_im.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/bfa/bfad_im.c
Extension
.c
Size
34929 bytes
Lines
1332
Domain
Driver Families
Bucket
drivers/scsi
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.

Dependency Surface

Detected Declarations

Annotated Snippet

if (sns_len > 0) {
			bfa_trc(bfad, sns_len);
			if (sns_len > SCSI_SENSE_BUFFERSIZE)
				sns_len = SCSI_SENSE_BUFFERSIZE;
			memcpy(cmnd->sense_buffer, sns_info, sns_len);
		}

		if (residue > 0) {
			bfa_trc(bfad, residue);
			scsi_set_resid(cmnd, residue);
			if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
				(scsi_bufflen(cmnd) - residue) <
					cmnd->underflow) {
				bfa_trc(bfad, 0);
				host_status = DID_ERROR;
			}
		}
		cmnd->result = host_status << 16 | scsi_status;

		break;

	case BFI_IOIM_STS_TIMEDOUT:
		cmnd->result = DID_TIME_OUT << 16;
		break;
	case BFI_IOIM_STS_PATHTOV:
		cmnd->result = DID_TRANSPORT_DISRUPTED << 16;
		break;
	default:
		cmnd->result = DID_ERROR << 16;
	}

	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
	if (cmnd->device->host != NULL)
		scsi_dma_unmap(cmnd);

	cmnd->host_scribble = NULL;
	bfa_trc(bfad, cmnd->result);

	itnim_data = cmnd->device->hostdata;
	if (itnim_data) {
		itnim = itnim_data->itnim;
		if (!cmnd->result && itnim &&
			 (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
			/* Queue depth adjustment for good status completion */
			bfad_ramp_up_qdepth(itnim, cmnd->device);
		} else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
			/* qfull handling */
			bfad_handle_qfull(itnim, cmnd->device);
		}
	}

	scsi_done(cmnd);
}

void
bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
{
	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
	struct bfad_itnim_data_s *itnim_data;
	struct bfad_itnim_s *itnim;

	cmnd->result = DID_OK << 16 | SAM_STAT_GOOD;

	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
	if (cmnd->device->host != NULL)
		scsi_dma_unmap(cmnd);

	cmnd->host_scribble = NULL;

	/* Queue depth adjustment */
	if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
		itnim_data = cmnd->device->hostdata;
		if (itnim_data) {
			itnim = itnim_data->itnim;
			if (itnim)
				bfad_ramp_up_qdepth(itnim, cmnd->device);
		}
	}

	scsi_done(cmnd);
}

void
bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
{
	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
	struct bfad_s         *bfad = drv;

	cmnd->result = DID_ERROR << 16;

Annotation

Implementation Notes