From: Quinn Tran <qtran@xxxxxxxxxxx>
This patch provide call back functions to stop the chip
and resume the chip if the PCI lower level driver wants
to perform function level reset/FLR. Before the FLR,
the chip will be stopped to turn off all DMA activity.
After the FLR, the chip is reset to resume previous
operation state.
Signed-off-by: Quinn Tran <qtran@xxxxxxxxxxx>
Signed-off-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_os.c | 53 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index c6ef83d0d99b..39a0bdb66612 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -6930,6 +6930,57 @@ qla2xxx_pci_resume(struct pci_dev *pdev)
ha->flags.eeh_busy = 0;
}
+static void
+qla_pci_reset_prepare(struct pci_dev *pdev)
+{
+ scsi_qla_host_t *base_vha = pci_get_drvdata(pdev);
+ struct qla_hw_data *ha = base_vha->hw;
+ struct qla_qpair *qpair;
+
+ ql_log(ql_log_warn, base_vha, 0xffff,
+ "%s.\n", __func__);
+
+ /*
+ * PCI FLR/function reset is about to reset the
+ * slot. Stop the chip to stop all DMA access.
+ * It is assumed that pci_reset_done will be called
+ * after FLR to resume Chip operation.
+ */
+ ha->flags.eeh_busy = 1;
+ mutex_lock(&ha->mq_lock);
+ list_for_each_entry(qpair, &base_vha->qp_list, qp_list_elem)
+ qpair->online = 0;
+ mutex_unlock(&ha->mq_lock);
+
+ set_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
+ qla2x00_abort_isp_cleanup(base_vha);
+ qla2x00_abort_all_cmds(base_vha, DID_RESET << 16);
+}
+
+static void
+qla_pci_reset_done(struct pci_dev *pdev)
+{
+ scsi_qla_host_t *base_vha = pci_get_drvdata(pdev);
+ struct qla_hw_data *ha = base_vha->hw;
+ struct qla_qpair *qpair;
+
+ ql_log(ql_log_warn, base_vha, 0xffff,
+ "%s.\n", __func__);
+
+ /*
+ * FLR just completed by PCI layer. Resume adapter
+ */
+ ha->flags.eeh_busy = 0;
+ mutex_lock(&ha->mq_lock);
+ list_for_each_entry(qpair, &base_vha->qp_list, qp_list_elem)
+ qpair->online = 1;
+ mutex_unlock(&ha->mq_lock);
+
+ base_vha->flags.online = 1;
+ ha->isp_ops->abort_isp(base_vha);
+ clear_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
+}
+
static int qla2xxx_map_queues(struct Scsi_Host *shost)
{
int rc;
@@ -6948,6 +6999,8 @@ static const struct pci_error_handlers qla2xxx_err_handler = {
.mmio_enabled = qla2xxx_pci_mmio_enabled,
.slot_reset = qla2xxx_pci_slot_reset,
.resume = qla2xxx_pci_resume,
+ .reset_prepare = qla_pci_reset_prepare,
+ .reset_done = qla_pci_reset_done,
};
static struct pci_device_id qla2xxx_pci_tbl[] = {
--
2.12.0
