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Commit 32951dd8 authored by Jayamohan Kallickal's avatar Jayamohan Kallickal Committed by James Bottomley
Browse files

[SCSI] be2iscsi: Remove Ring mode from driver 



Ring mode is not used. This patch removes the code.

Signed-off-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJayamohan Kallickal <jayamohank@serverengines.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent d0e2ddff

drivers/scsi/be2iscsi/be_main.c

+33 −148
Original line number Diff line number Diff line
@@ -40,7 +40,6 @@ 
static unsigned int be_iopoll_budget = 10;

static unsigned int be_max_phys_size = 64;

static unsigned int enable_msix = 1;

static unsigned int ring_mode;



MODULE_DEVICE_TABLE(pci, beiscsi_pci_id_table);

MODULE_DESCRIPTION(DRV_DESC " " BUILD_STR);
@@ -671,9 +670,7 @@ static void 
free_wrb_handle(struct beiscsi_hba *phba, struct hwi_wrb_context *pwrb_context,

		struct wrb_handle *pwrb_handle)

{

	if (!ring_mode)

		pwrb_context->pwrb_handle_base[pwrb_context->free_index] =

					       pwrb_handle;

	pwrb_context->pwrb_handle_base[pwrb_context->free_index] = pwrb_handle;

	pwrb_context->wrb_handles_available++;

	if (pwrb_context->free_index == (phba->params.wrbs_per_cxn - 1))

		pwrb_context->free_index = 0;
@@ -865,7 +862,6 @@ hwi_complete_drvr_msgs(struct beiscsi_conn *beiscsi_conn, 
{

	struct hwi_wrb_context *pwrb_context;

	struct wrb_handle *pwrb_handle = NULL;

	struct sgl_handle *psgl_handle = NULL;

	struct hwi_controller *phwi_ctrlr;

	struct iscsi_task *task;

	struct beiscsi_io_task *io_task;
@@ -873,14 +869,6 @@ hwi_complete_drvr_msgs(struct beiscsi_conn *beiscsi_conn, 
	struct iscsi_session *session = conn->session;



	phwi_ctrlr = phba->phwi_ctrlr;

	if (ring_mode) {

		psgl_handle = phba->sgl_hndl_array[((psol->

			      dw[offsetof(struct amap_sol_cqe_ring, icd_index) /

				32] & SOL_ICD_INDEX_MASK) >> 6)];

		pwrb_context = &phwi_ctrlr->wrb_context[psgl_handle->cid];

		task = psgl_handle->task;

		pwrb_handle = NULL;

	} else {

	pwrb_context = &phwi_ctrlr->wrb_context[((psol->

				dw[offsetof(struct amap_sol_cqe, cid) / 32] &

				SOL_CID_MASK) >> 6) -
@@ -889,7 +877,6 @@ hwi_complete_drvr_msgs(struct beiscsi_conn *beiscsi_conn, 
				dw[offsetof(struct amap_sol_cqe, wrb_index) /

				32] & SOL_WRB_INDEX_MASK) >> 16)];

	task = pwrb_handle->pio_handle;

	}



	io_task = task->dd_data;

	spin_lock(&phba->mgmt_sgl_lock);
@@ -930,21 +917,12 @@ static void hwi_complete_cmd(struct beiscsi_conn *beiscsi_conn, 
	struct iscsi_wrb *pwrb = NULL;

	struct hwi_controller *phwi_ctrlr;

	struct iscsi_task *task;

	struct sgl_handle *psgl_handle = NULL;

	unsigned int type;

	struct iscsi_conn *conn = beiscsi_conn->conn;

	struct iscsi_session *session = conn->session;



	phwi_ctrlr = phba->phwi_ctrlr;

	if (ring_mode) {

		psgl_handle = phba->sgl_hndl_array[((psol->

			      dw[offsetof(struct amap_sol_cqe_ring, icd_index) /

			      32] & SOL_ICD_INDEX_MASK) >> 6)];

		task = psgl_handle->task;

		type = psgl_handle->type;

	} else {

		pwrb_context = &phwi_ctrlr->

				wrb_context[((psol->dw[offsetof

	pwrb_context = &phwi_ctrlr->wrb_context[((psol->dw[offsetof

				(struct amap_sol_cqe, cid) / 32]

				& SOL_CID_MASK) >> 6) -

				phba->fw_config.iscsi_cid_start];
@@ -955,7 +933,7 @@ static void hwi_complete_cmd(struct beiscsi_conn *beiscsi_conn, 
	pwrb = pwrb_handle->pwrb;

	type = (pwrb->dw[offsetof(struct amap_iscsi_wrb, type) / 32] &

				 WRB_TYPE_MASK) >> 28;

	}



	spin_lock_bh(&session->lock);

	switch (type) {

	case HWH_TYPE_IO:
@@ -986,14 +964,6 @@ static void hwi_complete_cmd(struct beiscsi_conn *beiscsi_conn, 
		break;



	default:

		if (ring_mode)

			shost_printk(KERN_WARNING, phba->shost,

				"In hwi_complete_cmd, unknown type = %d"

				"icd_index 0x%x CID 0x%x\n", type,

				((psol->dw[offsetof(struct amap_sol_cqe_ring,

				icd_index) / 32] & SOL_ICD_INDEX_MASK) >> 6),

				psgl_handle->cid);

		else

		shost_printk(KERN_WARNING, phba->shost,

				"In hwi_complete_cmd, unknown type = %d"

				"wrb_index 0x%x CID 0x%x\n", type,
@@ -1483,7 +1453,6 @@ static unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq) 
	unsigned int num_processed = 0;

	unsigned int tot_nump = 0;

	struct beiscsi_conn *beiscsi_conn;

	struct sgl_handle *psgl_handle = NULL;

	struct beiscsi_endpoint *beiscsi_ep;

	struct iscsi_endpoint *ep;

	struct beiscsi_hba *phba;
@@ -1496,18 +1465,11 @@ static unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq) 
	       CQE_VALID_MASK) {

		be_dws_le_to_cpu(sol, sizeof(struct sol_cqe));



		if (ring_mode) {

			psgl_handle = phba->sgl_hndl_array[((sol->

				      dw[offsetof(struct amap_sol_cqe_ring,

				      icd_index) / 32] & SOL_ICD_INDEX_MASK)

				      >> 6)];

			ep = phba->ep_array[psgl_handle->cid];

		} else {

		ep = phba->ep_array[(u32) ((sol->

				   dw[offsetof(struct amap_sol_cqe, cid) / 32] &

				   SOL_CID_MASK) >> 6) -

				   phba->fw_config.iscsi_cid_start];

		}



		beiscsi_ep = ep->dd_data;

		beiscsi_conn = beiscsi_ep->conn;
@@ -1553,13 +1515,6 @@ static unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq) 
		case CMD_CXN_KILLED_ITT_INVALID:

		case CMD_CXN_KILLED_SEQ_OUTOFORDER:

		case CMD_CXN_KILLED_INVALID_DATASN_RCVD:

			if (ring_mode) {

				SE_DEBUG(DBG_LVL_1,

				 "CQ Error notification for cmd.. "

				 "code %d cid 0x%x\n",

				 sol->dw[offsetof(struct amap_sol_cqe, code) /

				 32] & CQE_CODE_MASK, psgl_handle->cid);

			} else {

			SE_DEBUG(DBG_LVL_1,

				 "CQ Error notification for cmd.. "

				 "code %d cid 0x%x\n",
@@ -1567,7 +1522,6 @@ static unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq) 
				 32] & CQE_CODE_MASK,

				 (sol->dw[offsetof(struct amap_sol_cqe, cid) /

				 32] & SOL_CID_MASK));

			}

			break;

		case UNSOL_DATA_DIGEST_ERROR_NOTIFY:

			SE_DEBUG(DBG_LVL_1,
@@ -1589,37 +1543,23 @@ static unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq) 
		case CXN_KILLED_OVER_RUN_RESIDUAL:

		case CXN_KILLED_UNDER_RUN_RESIDUAL:

		case CXN_KILLED_CMND_DATA_NOT_ON_SAME_CONN:

			if (ring_mode) {

				SE_DEBUG(DBG_LVL_1, "CQ Error %d, reset CID "

				 "0x%x...\n",

				 sol->dw[offsetof(struct amap_sol_cqe, code) /

				 32] & CQE_CODE_MASK, psgl_handle->cid);

			} else {

			SE_DEBUG(DBG_LVL_1, "CQ Error %d, reset CID "

				 "0x%x...\n",

				 sol->dw[offsetof(struct amap_sol_cqe, code) /

				 32] & CQE_CODE_MASK,

				 (sol->dw[offsetof(struct amap_sol_cqe, cid) /

				 32] & CQE_CID_MASK));

			}

			iscsi_conn_failure(beiscsi_conn->conn,

					   ISCSI_ERR_CONN_FAILED);

			break;

		case CXN_KILLED_RST_SENT:

		case CXN_KILLED_RST_RCVD:

			if (ring_mode) {

				SE_DEBUG(DBG_LVL_1, "CQ Error %d, reset"

				"received/sent on CID 0x%x...\n",

				 sol->dw[offsetof(struct amap_sol_cqe, code) /

				 32] & CQE_CODE_MASK, psgl_handle->cid);

			} else {

			SE_DEBUG(DBG_LVL_1, "CQ Error %d, reset"

				"received/sent on CID 0x%x...\n",

				 sol->dw[offsetof(struct amap_sol_cqe, code) /

				 32] & CQE_CODE_MASK,

				 (sol->dw[offsetof(struct amap_sol_cqe, cid) /

				 32] & CQE_CID_MASK));

			}

			iscsi_conn_failure(beiscsi_conn->conn,

					   ISCSI_ERR_CONN_FAILED);

			break;
@@ -2848,11 +2788,6 @@ static int hwi_init_port(struct beiscsi_hba *phba) 
		goto error;

	}



	if (phba->fw_config.iscsi_features == 0x1)

		ring_mode = 1;

	else

		ring_mode = 0;



	status = beiscsi_create_cqs(phba, phwi_context);

	if (status != 0) {

		shost_printk(KERN_ERR, phba->shost, "CQ not created\n");
@@ -2980,17 +2915,6 @@ static int beiscsi_init_sgl_handle(struct beiscsi_hba *phba) 
	phba->io_sgl_hndl_avbl = 0;

	phba->eh_sgl_hndl_avbl = 0;



	if (ring_mode) {

		phba->sgl_hndl_array = kzalloc(sizeof(struct sgl_handle *) *

					      phba->params.icds_per_ctrl,

						 GFP_KERNEL);

		if (!phba->sgl_hndl_array) {

			shost_printk(KERN_ERR, phba->shost,

			     "Mem Alloc Failed. Failing to load\n");

			return -ENOMEM;

		}

	}



	mem_descr_sglh = phba->init_mem;

	mem_descr_sglh += HWI_MEM_SGLH;

	if (1 == mem_descr_sglh->num_elements) {
@@ -2998,8 +2922,6 @@ static int beiscsi_init_sgl_handle(struct beiscsi_hba *phba) 
						 phba->params.ios_per_ctrl,

						 GFP_KERNEL);

		if (!phba->io_sgl_hndl_base) {

			if (ring_mode)

				kfree(phba->sgl_hndl_array);

			shost_printk(KERN_ERR, phba->shost,

				     "Mem Alloc Failed. Failing to load\n");

			return -ENOMEM;
@@ -3184,8 +3106,6 @@ static int beiscsi_init_port(struct beiscsi_hba *phba) 
	if (hba_setup_cid_tbls(phba)) {

		shost_printk(KERN_ERR, phba->shost,

			     "Failed in hba_setup_cid_tbls\n");

		if (ring_mode)

			kfree(phba->sgl_hndl_array);

		kfree(phba->io_sgl_hndl_base);

		kfree(phba->eh_sgl_hndl_base);

		goto do_cleanup_ctrlr;
@@ -3242,8 +3162,6 @@ static void beiscsi_clean_port(struct beiscsi_hba *phba) 


	hwi_purge_eq(phba);

	hwi_cleanup(phba);

	if (ring_mode)

		kfree(phba->sgl_hndl_array);

	kfree(phba->io_sgl_hndl_base);

	kfree(phba->eh_sgl_hndl_base);

	kfree(phba->cid_array);
@@ -3329,7 +3247,6 @@ beiscsi_offload_connection(struct beiscsi_conn *beiscsi_conn, 
	be_dws_le_to_cpu(pwrb, sizeof(struct iscsi_target_context_update_wrb));



	doorbell |= beiscsi_conn->beiscsi_conn_cid & DB_WRB_POST_CID_MASK;

	if (!ring_mode)

	doorbell |= (pwrb_handle->wrb_index & DB_DEF_PDU_WRB_INDEX_MASK)

			     << DB_DEF_PDU_WRB_INDEX_SHIFT;

	doorbell |= 1 << DB_DEF_PDU_NUM_POSTED_SHIFT;
@@ -3417,14 +3334,6 @@ static int beiscsi_alloc_pdu(struct iscsi_task *task, uint8_t opcode) 
	itt = (itt_t) cpu_to_be32(((unsigned int)io_task->pwrb_handle->

				 wrb_index << 16) | (unsigned int)

				(io_task->psgl_handle->sgl_index));

	if (ring_mode) {

		phba->sgl_hndl_array[io_task->psgl_handle->sgl_index -

				     phba->fw_config.iscsi_icd_start] =

				     io_task->psgl_handle;

		io_task->psgl_handle->task = task;

		io_task->psgl_handle->cid = beiscsi_conn->beiscsi_conn_cid  -

					    phba->fw_config.iscsi_cid_start;

	} else

	io_task->pwrb_handle->pio_handle = task;



	io_task->cmd_bhs->iscsi_hdr.itt = itt;
@@ -3511,16 +3420,10 @@ static int beiscsi_iotask(struct iscsi_task *task, struct scatterlist *sg, 
			      ISCSI_OPCODE_SCSI_DATA_OUT);

		AMAP_SET_BITS(struct amap_pdu_data_out, final_bit,

			      &io_task->cmd_bhs->iscsi_data_pdu, 1);

		if (ring_mode)

			io_task->psgl_handle->type = INI_WR_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      INI_WR_CMD);

		AMAP_SET_BITS(struct amap_iscsi_wrb, dsp, pwrb, 1);

	} else {

		if (ring_mode)

			io_task->psgl_handle->type = INI_RD_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      INI_RD_CMD);

		AMAP_SET_BITS(struct amap_iscsi_wrb, dsp, pwrb, 0);
@@ -3547,7 +3450,6 @@ static int beiscsi_iotask(struct iscsi_task *task, struct scatterlist *sg, 
	be_dws_le_to_cpu(pwrb, sizeof(struct iscsi_wrb));



	doorbell |= beiscsi_conn->beiscsi_conn_cid & DB_WRB_POST_CID_MASK;

	if (!ring_mode)

	doorbell |= (io_task->pwrb_handle->wrb_index &

		     DB_DEF_PDU_WRB_INDEX_MASK) << DB_DEF_PDU_WRB_INDEX_SHIFT;

	doorbell |= 1 << DB_DEF_PDU_NUM_POSTED_SHIFT;
@@ -3583,9 +3485,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 


	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {

	case ISCSI_OP_LOGIN:

		if (ring_mode)

			io_task->psgl_handle->type = TGT_DM_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      TGT_DM_CMD);

		AMAP_SET_BITS(struct amap_iscsi_wrb, dmsg, pwrb, 0);
@@ -3593,9 +3492,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 
		hwi_write_buffer(pwrb, task);

		break;

	case ISCSI_OP_NOOP_OUT:

		if (ring_mode)

			io_task->psgl_handle->type = INI_RD_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      INI_RD_CMD);

		if (task->hdr->ttt == ISCSI_RESERVED_TAG)
@@ -3605,9 +3501,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 
		hwi_write_buffer(pwrb, task);

		break;

	case ISCSI_OP_TEXT:

		if (ring_mode)

			io_task->psgl_handle->type = INI_WR_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      INI_WR_CMD);

		AMAP_SET_BITS(struct amap_iscsi_wrb, dmsg, pwrb, 0);
@@ -3642,9 +3535,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 
						 phba->ctrl.mcc_numtag[tag]);

			free_mcc_tag(&phba->ctrl, tag);

		}

		if (ring_mode)

			io_task->psgl_handle->type = INI_TMF_CMD;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

			      INI_TMF_CMD);

		AMAP_SET_BITS(struct amap_iscsi_wrb, dmsg, pwrb, 0);
@@ -3652,9 +3542,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 
		break;

	case ISCSI_OP_LOGOUT:

		AMAP_SET_BITS(struct amap_iscsi_wrb, dmsg, pwrb, 0);

		if (ring_mode)

			io_task->psgl_handle->type = HWH_TYPE_LOGOUT;

		else

		AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb,

				HWH_TYPE_LOGOUT);

		hwi_write_buffer(pwrb, task);
@@ -3673,7 +3560,6 @@ static int beiscsi_mtask(struct iscsi_task *task) 
	be_dws_le_to_cpu(pwrb, sizeof(struct iscsi_wrb));



	doorbell |= cid & DB_WRB_POST_CID_MASK;

	if (!ring_mode)

	doorbell |= (io_task->pwrb_handle->wrb_index &

		     DB_DEF_PDU_WRB_INDEX_MASK) << DB_DEF_PDU_WRB_INDEX_SHIFT;

	doorbell |= 1 << DB_DEF_PDU_NUM_POSTED_SHIFT;
@@ -3999,7 +3885,6 @@ static int __init beiscsi_module_init(void) 
			 "beiscsi pci driver.\n");

		goto unregister_iscsi_transport;

	}

	ring_mode = 0;

	return 0;



unregister_iscsi_transport: