hisi_sas: add slot_index_alloc_quirk_v2_hw()
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>
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 4276594..f2966d8 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -465,6 +465,33 @@
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 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,