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hisi_sas: add slot_index_alloc_quirk_v2_hw()

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Add v2 hw custom function slot_index_alloc_quirk_v2_hw().  SAS devices
should have IPTT bit0 equal to 1.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2016-04-15 21:36:37 +08:00 committed by Martin K. Petersen
parent 685b6d6e67
commit 330fa7f314
1 changed files with 28 additions and 0 deletions
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28
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
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@ -465,6 +465,33 @@ static u32 hisi_sas_phy_read32(struct hisi_hba *hisi_hba,
return readl(regs);
}
/* This function needs to be protected from pre-emption. */
static int
slot_index_alloc_quirk_v2_hw(struct hisi_hba *hisi_hba, int *slot_idx,
struct domain_device *device)
{
unsigned int index = 0;
void *bitmap = hisi_hba->slot_index_tags;
int sata_dev = dev_is_sata(device);
while (1) {
index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
index);
if (index >= hisi_hba->slot_index_count)
return -SAS_QUEUE_FULL;
/*
* SAS IPTT bit0 should be 1
*/
if (sata_dev || (index & 1))
break;
index++;
}
set_bit(index, bitmap);
*slot_idx = index;
return 0;
}
static void config_phy_opt_mode_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
{
u32 cfg = hisi_sas_phy_read32(hisi_hba, phy_no, PHY_CFG);
@ -2167,6 +2194,7 @@ static int hisi_sas_v2_init(struct hisi_hba *hisi_hba)
static const struct hisi_sas_hw hisi_sas_v2_hw = {
.hw_init = hisi_sas_v2_init,
.setup_itct = setup_itct_v2_hw,
.slot_index_alloc = slot_index_alloc_quirk_v2_hw,
.sl_notify = sl_notify_v2_hw,
.get_wideport_bitmap = get_wideport_bitmap_v2_hw,
.free_device = free_device_v2_hw,