drivers/scsi/bfa/bfa_fcpim.c

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

File Facts

System
Linux kernel
Corpus path
drivers/scsi/bfa/bfa_fcpim.c
Extension
.c
Size
94201 bytes
Lines
3838
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 (!bfa_itnim_is_online(ioim->itnim)) {
			if (!bfa_itnim_hold_io(ioim->itnim)) {
				bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
				list_del(&ioim->qe);
				list_add_tail(&ioim->qe,
					&ioim->fcpim->ioim_comp_q);
				bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
						__bfa_cb_ioim_pathtov, ioim);
			} else {
				list_del(&ioim->qe);
				list_add_tail(&ioim->qe,
					&ioim->itnim->pending_q);
			}
			break;
		}

		if (ioim->nsges > BFI_SGE_INLINE) {
			if (!bfa_ioim_sgpg_alloc(ioim)) {
				bfa_sm_set_state(ioim, bfa_ioim_sm_sgalloc);
				return;
			}
		}

		if (!bfa_ioim_send_ioreq(ioim)) {
			bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
			break;
		}

		bfa_sm_set_state(ioim, bfa_ioim_sm_active);
		break;

	case BFA_IOIM_SM_IOTOV:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_ioim_move_to_comp_q(ioim);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
				__bfa_cb_ioim_pathtov, ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		/*
		 * IO in pending queue can get abort requests. Complete abort
		 * requests immediately.
		 */
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		WARN_ON(!bfa_q_is_on_q(&ioim->itnim->pending_q, ioim));
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
			__bfa_cb_ioim_abort, ioim);
		break;

	default:
		bfa_sm_fault(ioim->bfa, event);
	}
}

/*
 * IO is waiting for SG pages.
 */
static void
bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
	bfa_trc(ioim->bfa, ioim->iotag);
	bfa_trc(ioim->bfa, event);

	switch (event) {
	case BFA_IOIM_SM_SGALLOCED:
		if (!bfa_ioim_send_ioreq(ioim)) {
			bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
			break;
		}
		bfa_sm_set_state(ioim, bfa_ioim_sm_active);
		break;

	case BFA_IOIM_SM_CLEANUP:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
			      ioim);
		bfa_ioim_notify_cleanup(ioim);
		break;

	case BFA_IOIM_SM_ABORT:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
		bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
		bfa_ioim_move_to_comp_q(ioim);
		bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
			      ioim);
		break;

	case BFA_IOIM_SM_HWFAIL:
		bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);

Annotation

Implementation Notes