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hisi_sas: Add scsi host registration

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Add functionality to register device as a scsi host.

The SAS domain transport ops are empty at this point.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2015-11-18 00:50:31 +08:00 committed by Martin K. Petersen
parent e8899fad96
commit 7eb7869f13
2 changed files with 150 additions and 0 deletions
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34
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -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

116
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -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);