+/*
+ * WQ, RQ, CQ allocation scheme. Firmware gives the driver an array of
+ * WQs, an array of RQs, and an array of CQs. Fow now, these are
+ * statically allocated between PF app send/receive queues and VF
+ * representor app send/receive queues. VF representor supports only 1
+ * send and 1 receive queue. The number of PF app queue is not known
+ * until the queue setup time.
+ *
+ * R = number of receive queues for PF app
+ * S = number of send queues for PF app
+ * V = number of VF representors
+ *
+ * wI = WQ for PF app send queue I
+ * rI = SOP RQ for PF app receive queue I
+ * dI = Data RQ for rI
+ * cwI = CQ for wI
+ * crI = CQ for rI
+ * vwI = WQ for VF representor send queue I
+ * vrI = SOP RQ for VF representor receive queue I
+ * vdI = Data RQ for vrI
+ * vcwI = CQ for vwI
+ * vcrI = CQ for vrI
+ *
+ * WQ array: | w0 |..| wS-1 |..| vwV-1 |..| vw0 |
+ * ^ ^ ^ ^
+ * index 0 S-1 W-V W-1 W=len(WQ array)
+ *
+ * RQ array: | r0 |..| rR-1 |d0 |..|dR-1| ..|vdV-1 |..| vd0 |vrV-1 |..|vr0 |
+ * ^ ^ ^ ^ ^ ^ ^ ^
+ * index 0 R-1 R 2R-1 X-2V X-(V+1) X-V X-1
+ * X=len(RQ array)
+ *
+ * CQ array: | cr0 |..| crR-1 |cw0|..|cwS-1|..|vcwV-1|..| vcw0|vcrV-1|..|vcr0|..
+ * ^ ^ ^ ^ ^ ^ ^ ^
+ * index 0 R-1 R R+S-1 X-2V X-(V+1) X-V X-1
+ * X is not a typo. It really is len(RQ array) to accommodate enic_cq_rq() used
+ * throughout RX handlers. The current scheme requires
+ * len(CQ array) >= len(RQ array).
+ */
+
+static inline unsigned int vf_wq_cq_idx(struct enic_vf_representor *vf)
+{
+ /* rq is not a typo. index(vcwI) coincides with index(vdI) */
+ return vf->pf->conf_rq_count - (vf->pf->max_vf_id + vf->vf_id + 2);
+}
+
+static inline unsigned int vf_wq_idx(struct enic_vf_representor *vf)
+{
+ return vf->pf->conf_wq_count - vf->vf_id - 1;
+}
+
+static inline unsigned int vf_rq_sop_idx(struct enic_vf_representor *vf)
+{
+ return vf->pf->conf_rq_count - vf->vf_id - 1;
+}
+
+static inline unsigned int vf_rq_data_idx(struct enic_vf_representor *vf)
+{
+ return vf->pf->conf_rq_count - (vf->pf->max_vf_id + vf->vf_id + 2);
+}
+