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

Commit 7eb7869f authored by John Garry's avatar John Garry Committed by Martin K. Petersen
Browse files

hisi_sas: Add scsi host registration 



Add functionality to register device as a scsi host.

The SAS domain transport ops are empty at this point.

Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent e8899fad

drivers/scsi/hisi_sas/hisi_sas.h

+34 −0
Original line number Diff line number Diff line
@@ -23,4 +23,38 @@ 


#define DRV_VERSION "v1.0"



#define HISI_SAS_MAX_PHYS	9

#define HISI_SAS_MAX_ITCT_ENTRIES 4096

#define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES

#define HISI_SAS_COMMAND_ENTRIES 8192



struct hisi_sas_phy {

	struct asd_sas_phy	sas_phy;

};



struct hisi_sas_port {

	struct asd_sas_port	sas_port;

};



struct hisi_sas_hw {

};



struct hisi_hba {

	/* This must be the first element, used by SHOST_TO_SAS_HA */

	struct sas_ha_struct *p;



	struct platform_device *pdev;

	u8 sas_addr[SAS_ADDR_SIZE];



	int n_phy;



	/* SCSI/SAS glue */

	struct sas_ha_struct sha;

	struct Scsi_Host *shost;

	struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];

	struct hisi_sas_port port[HISI_SAS_MAX_PHYS];

	const struct hisi_sas_hw *hw;	/* Low level hw interface */

};



#define HISI_SAS_SGE_PAGE_CNT SCSI_MAX_SG_SEGMENTS

#endif

drivers/scsi/hisi_sas/hisi_sas_main.c

+116 −0
Original line number Diff line number Diff line
@@ -14,9 +14,125 @@ 


static struct scsi_transport_template *hisi_sas_stt;



static struct scsi_host_template hisi_sas_sht = {

	.module			= THIS_MODULE,

	.name			= DRV_NAME,

	.queuecommand		= sas_queuecommand,

	.target_alloc		= sas_target_alloc,

	.slave_configure	= sas_slave_configure,

	.change_queue_depth	= sas_change_queue_depth,

	.bios_param		= sas_bios_param,

	.can_queue		= 1,

	.this_id		= -1,

	.sg_tablesize		= SG_ALL,

	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,

	.use_clustering		= ENABLE_CLUSTERING,

	.eh_device_reset_handler = sas_eh_device_reset_handler,

	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,

	.target_destroy		= sas_target_destroy,

	.ioctl			= sas_ioctl,

};



static struct sas_domain_function_template hisi_sas_transport_ops = {

};



static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,

					      const struct hisi_sas_hw *hw)

{

	struct Scsi_Host *shost;

	struct hisi_hba *hisi_hba;

	struct device *dev = &pdev->dev;



	shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));

	if (!shost)

		goto err_out;

	hisi_hba = shost_priv(shost);



	hisi_hba->hw = hw;

	hisi_hba->pdev = pdev;

	hisi_hba->shost = shost;

	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;



	return shost;

err_out:

	dev_err(dev, "shost alloc failed\n");

	return NULL;

}



int hisi_sas_probe(struct platform_device *pdev,

			 const struct hisi_sas_hw *hw)

{

	struct Scsi_Host *shost;

	struct hisi_hba *hisi_hba;

	struct device *dev = &pdev->dev;

	struct asd_sas_phy **arr_phy;

	struct asd_sas_port **arr_port;

	struct sas_ha_struct *sha;

	int rc, phy_nr, port_nr, i;



	shost = hisi_sas_shost_alloc(pdev, hw);

	if (!shost) {

		rc = -ENOMEM;

		goto err_out_ha;

	}



	sha = SHOST_TO_SAS_HA(shost);

	hisi_hba = shost_priv(shost);

	platform_set_drvdata(pdev, sha);

	hisi_hba->n_phy = HISI_SAS_MAX_PHYS;

	phy_nr = port_nr = hisi_hba->n_phy;



	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);

	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);

	if (!arr_phy || !arr_port)

		return -ENOMEM;



	sha->sas_phy = arr_phy;

	sha->sas_port = arr_port;

	sha->core.shost = shost;

	sha->lldd_ha = hisi_hba;



	shost->transportt = hisi_sas_stt;

	shost->max_id = HISI_SAS_MAX_DEVICES;

	shost->max_lun = ~0;

	shost->max_channel = 1;

	shost->max_cmd_len = 16;

	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);

	shost->can_queue = HISI_SAS_COMMAND_ENTRIES;

	shost->cmd_per_lun = HISI_SAS_COMMAND_ENTRIES;



	sha->sas_ha_name = DRV_NAME;

	sha->dev = &hisi_hba->pdev->dev;

	sha->lldd_module = THIS_MODULE;

	sha->sas_addr = &hisi_hba->sas_addr[0];

	sha->num_phys = hisi_hba->n_phy;

	sha->core.shost = hisi_hba->shost;



	for (i = 0; i < hisi_hba->n_phy; i++) {

		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;

		sha->sas_port[i] = &hisi_hba->port[i].sas_port;

	}



	rc = scsi_add_host(shost, &pdev->dev);

	if (rc)

		goto err_out_ha;



	rc = sas_register_ha(sha);

	if (rc)

		goto err_out_register_ha;



	scsi_scan_host(shost);



	return 0;



err_out_register_ha:

	scsi_remove_host(shost);

err_out_ha:

	kfree(shost);

	return rc;

}

EXPORT_SYMBOL_GPL(hisi_sas_probe);



static __init int hisi_sas_init(void)

{

	pr_info("hisi_sas: driver version %s\n", DRV_VERSION);