C++ (Cpp) nvme_allocate_request_bioの例

コード例 #1

ファイル: nvme_ns_cmd.c プロジェクト: dcui/FreeBSD-9.3_kernel

int
nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
    nvme_cb_fn_t cb_fn, void *cb_arg)
{
	struct nvme_request	*req;
	struct nvme_command	*cmd;
	uint64_t		lba;
	uint64_t		lba_count;

	req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);

	if (req == NULL)
		return (ENOMEM);
	cmd = &req->cmd;
	cmd->opc = NVME_OPC_READ;
	cmd->nsid = ns->id;

	lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
	lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);

	/* TODO: create a read command data structure */
	*(uint64_t *)&cmd->cdw10 = lba;
	cmd->cdw12 = lba_count-1;

	nvme_ctrlr_submit_io_request(ns->ctrlr, req);

	return (0);
}

コード例 #2

ファイル: nvme_sim.c プロジェクト: Hooman3/freebsd

static void
nvme_sim_nvmeio(struct cam_sim *sim, union ccb *ccb)
{
	struct ccb_nvmeio	*nvmeio = &ccb->nvmeio;
	struct nvme_request	*req;
	void			*payload;
	uint32_t		size;
	struct nvme_controller *ctrlr;

	ctrlr = sim2ctrlr(sim);
	payload = nvmeio->data_ptr;
	size = nvmeio->dxfer_len;
	/* SG LIST ??? */
	if ((nvmeio->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_BIO)
		req = nvme_allocate_request_bio((struct bio *)payload,
		    nvme_sim_nvmeio_done, ccb);
	else if (payload == NULL)
		req = nvme_allocate_request_null(nvme_sim_nvmeio_done, ccb);
	else
		req = nvme_allocate_request_vaddr(payload, size,
		    nvme_sim_nvmeio_done, ccb);

	if (req == NULL) {
		nvmeio->ccb_h.status = CAM_RESRC_UNAVAIL;
		xpt_done(ccb);
		return;
	}

	memcpy(&req->cmd, &ccb->nvmeio.cmd, sizeof(ccb->nvmeio.cmd));

	nvme_ctrlr_submit_io_request(ctrlr, req);

	ccb->ccb_h.status |= CAM_SIM_QUEUED;
}