mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-26 10:49:33 +00:00
Code Issues Releases Wiki Activity

hisi_sas: Add slot init code

Browse source 
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;