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Commit c2d89392 authored by John Garry's avatar John Garry Committed by Martin K. Petersen
Browse files

hisi_sas: add v2 code to send smp command 



Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 8c36e31d

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

+71 −0
Original line number Diff line number Diff line
@@ -744,6 +744,76 @@ static int prep_prd_sge_v2_hw(struct hisi_hba *hisi_hba, 
	return 0;

}



static int prep_smp_v2_hw(struct hisi_hba *hisi_hba,

			  struct hisi_sas_slot *slot)

{

	struct sas_task *task = slot->task;

	struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;

	struct domain_device *device = task->dev;

	struct device *dev = &hisi_hba->pdev->dev;

	struct hisi_sas_port *port = slot->port;

	struct scatterlist *sg_req, *sg_resp;

	struct hisi_sas_device *sas_dev = device->lldd_dev;

	dma_addr_t req_dma_addr;

	unsigned int req_len, resp_len;

	int elem, rc;



	/*

	* DMA-map SMP request, response buffers

	*/

	/* req */

	sg_req = &task->smp_task.smp_req;

	elem = dma_map_sg(dev, sg_req, 1, DMA_TO_DEVICE);

	if (!elem)

		return -ENOMEM;

	req_len = sg_dma_len(sg_req);

	req_dma_addr = sg_dma_address(sg_req);



	/* resp */

	sg_resp = &task->smp_task.smp_resp;

	elem = dma_map_sg(dev, sg_resp, 1, DMA_FROM_DEVICE);

	if (!elem) {

		rc = -ENOMEM;

		goto err_out_req;

	}

	resp_len = sg_dma_len(sg_resp);

	if ((req_len & 0x3) || (resp_len & 0x3)) {

		rc = -EINVAL;

		goto err_out_resp;

	}



	/* create header */

	/* dw0 */

	hdr->dw0 = cpu_to_le32((port->id << CMD_HDR_PORT_OFF) |

			       (1 << CMD_HDR_PRIORITY_OFF) | /* high pri */

			       (2 << CMD_HDR_CMD_OFF)); /* smp */



	/* map itct entry */

	hdr->dw1 = cpu_to_le32((sas_dev->device_id << CMD_HDR_DEV_ID_OFF) |

			       (1 << CMD_HDR_FRAME_TYPE_OFF) |

			       (DIR_NO_DATA << CMD_HDR_DIR_OFF));



	/* dw2 */

	hdr->dw2 = cpu_to_le32((((req_len - 4) / 4) << CMD_HDR_CFL_OFF) |

			       (HISI_SAS_MAX_SMP_RESP_SZ / 4 <<

			       CMD_HDR_MRFL_OFF));



	hdr->transfer_tags = cpu_to_le32(slot->idx << CMD_HDR_IPTT_OFF);



	hdr->cmd_table_addr = cpu_to_le64(req_dma_addr);

	hdr->sts_buffer_addr = cpu_to_le64(slot->status_buffer_dma);



	return 0;



err_out_resp:

	dma_unmap_sg(dev, &slot->task->smp_task.smp_resp, 1,

		     DMA_FROM_DEVICE);

err_out_req:

	dma_unmap_sg(dev, &slot->task->smp_task.smp_req, 1,

		     DMA_TO_DEVICE);

	return rc;

}



static int prep_ssp_v2_hw(struct hisi_hba *hisi_hba,

			  struct hisi_sas_slot *slot, int is_tmf,

			  struct hisi_sas_tmf_task *tmf)
@@ -1395,6 +1465,7 @@ static const struct hisi_sas_hw hisi_sas_v2_hw = { 
	.hw_init = hisi_sas_v2_init,

	.sl_notify = sl_notify_v2_hw,

	.get_wideport_bitmap = get_wideport_bitmap_v2_hw,

	.prep_smp = prep_smp_v2_hw,

	.prep_ssp = prep_ssp_v2_hw,

	.get_free_slot = get_free_slot_v2_hw,

	.start_delivery = start_delivery_v2_hw,