qed: Disable RoCE dpm when DCBx change occurs
If DCBx update occurs while QPs are open, stop sending edpms until all
QPs are closed.
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/qlogic/qed/qed_roce.c b/drivers/net/ethernet/qlogic/qed/qed_roce.c
index 4bc2f6c..8419dcc 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_roce.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_roce.c
@@ -162,6 +162,11 @@ static int qed_bmap_test_id(struct qed_hwfn *p_hwfn,
return test_bit(id_num, bmap->bitmap);
}
+static bool qed_bmap_is_empty(struct qed_bmap *bmap)
+{
+ return bmap->max_count == find_first_bit(bmap->bitmap, bmap->max_count);
+}
+
static u32 qed_rdma_get_sb_id(void *p_hwfn, u32 rel_sb_id)
{
/* First sb id for RoCE is after all the l2 sb */
@@ -2638,6 +2643,23 @@ static void *qed_rdma_get_rdma_ctx(struct qed_dev *cdev)
return QED_LEADING_HWFN(cdev);
}
+static bool qed_rdma_allocated_qps(struct qed_hwfn *p_hwfn)
+{
+ bool result;
+
+ /* if rdma info has not been allocated, naturally there are no qps */
+ if (!p_hwfn->p_rdma_info)
+ return false;
+
+ spin_lock_bh(&p_hwfn->p_rdma_info->lock);
+ if (!p_hwfn->p_rdma_info->cid_map.bitmap)
+ result = false;
+ else
+ result = !qed_bmap_is_empty(&p_hwfn->p_rdma_info->cid_map);
+ spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
+ return result;
+}
+
static void qed_rdma_dpm_conf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u32 val;
@@ -2650,6 +2672,20 @@ static void qed_rdma_dpm_conf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
val, p_hwfn->dcbx_no_edpm, p_hwfn->db_bar_no_edpm);
}
+void qed_roce_dpm_dcbx(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+ u8 val;
+
+ /* if any QPs are already active, we want to disable DPM, since their
+ * context information contains information from before the latest DCBx
+ * update. Otherwise enable it.
+ */
+ val = qed_rdma_allocated_qps(p_hwfn) ? true : false;
+ p_hwfn->dcbx_no_edpm = (u8)val;
+
+ qed_rdma_dpm_conf(p_hwfn, p_ptt);
+}
+
void qed_rdma_dpm_bar(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
p_hwfn->db_bar_no_edpm = true;