+/* Returns either 0, or log(size) */
+static u32 ecore_iov_vf_db_bar_size(struct ecore_hwfn *p_hwfn,
+ struct ecore_ptt *p_ptt)
+{
+ u32 val = ecore_rd(p_hwfn, p_ptt, PGLUE_B_REG_VF_BAR1_SIZE);
+
+ if (val)
+ return val + 11;
+ return 0;
+}
+
+static void
+ecore_iov_vf_mbx_acquire_resc_cids(struct ecore_hwfn *p_hwfn,
+ struct ecore_ptt *p_ptt,
+ struct ecore_vf_info *p_vf,
+ struct vf_pf_resc_request *p_req,
+ struct pf_vf_resc *p_resp)
+{
+ u8 num_vf_cons = p_hwfn->pf_params.eth_pf_params.num_vf_cons;
+ u8 db_size = DB_ADDR_VF(1, DQ_DEMS_LEGACY) -
+ DB_ADDR_VF(0, DQ_DEMS_LEGACY);
+ u32 bar_size;
+
+ p_resp->num_cids = OSAL_MIN_T(u8, p_req->num_cids, num_vf_cons);
+
+ /* If VF didn't bother asking for QIDs than don't bother limiting
+ * number of CIDs. The VF doesn't care about the number, and this
+ * has the likely result of causing an additional acquisition.
+ */
+ if (!(p_vf->acquire.vfdev_info.capabilities &
+ VFPF_ACQUIRE_CAP_QUEUE_QIDS))
+ return;
+
+ /* If doorbell bar was mapped by VF, limit the VF CIDs to an amount
+ * that would make sure doorbells for all CIDs fall within the bar.
+ * If it doesn't, make sure regview window is sufficient.
+ */
+ if (p_vf->acquire.vfdev_info.capabilities &
+ VFPF_ACQUIRE_CAP_PHYSICAL_BAR) {
+ bar_size = ecore_iov_vf_db_bar_size(p_hwfn, p_ptt);
+ if (bar_size)
+ bar_size = 1 << bar_size;
+
+ if (ECORE_IS_CMT(p_hwfn->p_dev))
+ bar_size /= 2;
+ } else {
+ bar_size = PXP_VF_BAR0_DQ_LENGTH;
+ }
+
+ if (bar_size / db_size < 256)
+ p_resp->num_cids = OSAL_MIN_T(u8, p_resp->num_cids,
+ (u8)(bar_size / db_size));
+}
+