Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fa913de2 authored by Xiang Chen's avatar Xiang Chen Committed by Martin K. Petersen
Browse files

scsi: hisi_sas: add v3 code to send SMP frame 



Add code to prepare SMP frame.

Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent a2204723

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

+74 −0
Original line number Diff line number Diff line
@@ -186,6 +186,9 @@ 
#define CMD_HDR_MRFL_MSK		(0x1ff << CMD_HDR_MRFL_OFF)

#define CMD_HDR_SG_MOD_OFF		24

#define CMD_HDR_SG_MOD_MSK		(0x3 << CMD_HDR_SG_MOD_OFF)

/* dw3 */

#define CMD_HDR_IPTT_OFF		0

#define CMD_HDR_IPTT_MSK		(0xffff << CMD_HDR_IPTT_OFF)

/* dw6 */

#define CMD_HDR_DIF_SGL_LEN_OFF		0

#define CMD_HDR_DIF_SGL_LEN_MSK		(0xffff << CMD_HDR_DIF_SGL_LEN_OFF)
@@ -652,6 +655,76 @@ static int prep_ssp_v3_hw(struct hisi_hba *hisi_hba, 
	return 0;

}



static int prep_smp_v3_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->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 phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)

{

	int i, res = 0;
@@ -1225,6 +1298,7 @@ static const struct hisi_sas_hw hisi_sas_v3_hw = { 
	.complete_hdr_size = sizeof(struct hisi_sas_complete_v3_hdr),

	.sl_notify = sl_notify_v3_hw,

	.prep_ssp = prep_ssp_v3_hw,

	.prep_smp = prep_smp_v3_hw,

	.get_free_slot = get_free_slot_v3_hw,

	.start_delivery = start_delivery_v3_hw,

	.slot_complete = slot_complete_v3_hw,