openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

hisi_sas: Add slot init code 

Add functionality to init slot indexing.

Slot indexing is for the host to track which slots (or tags) are free
and which are used.

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 00:50:36 +08:00 committed by Martin K. Petersen
parent 89d533223d
commit 257efd1f69
2 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -66,6 +66,10 @@ struct hisi_hba {
int n_phy;
int slot_index_count;
unsigned long *slot_index_tags;
/* SCSI/SAS glue */
struct sas_ha_struct sha;
struct Scsi_Host *shost;

23
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -12,6 +12,21 @@
#include "hisi_sas.h"
#define DRV_NAME "hisi_sas"
static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
{
void *bitmap = hisi_hba->slot_index_tags;
clear_bit(slot_idx, bitmap);
}
static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
{
int i;
for (i = 0; i < hisi_hba->slot_index_count; ++i)
hisi_sas_slot_index_clear(hisi_hba, i);
}
static struct scsi_transport_template *hisi_sas_stt;
static struct scsi_host_template hisi_sas_sht = {
@ -102,6 +117,12 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
memset(hisi_hba->breakpoint, 0, s);
hisi_hba->slot_index_count = HISI_SAS_COMMAND_ENTRIES;
s = hisi_hba->slot_index_count / sizeof(unsigned long);
hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
if (!hisi_hba->slot_index_tags)
goto err_out;
hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
sizeof(struct hisi_sas_sge_page), 16, 0);
if (!hisi_hba->sge_page_pool)
@ -121,6 +142,8 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
goto err_out;
memset(hisi_hba->sata_breakpoint, 0, s);
hisi_sas_slot_index_init(hisi_hba);
return 0;
err_out:
return -ENOMEM;