drivers: net: xgene: Add helper function

This is a prepartion patch and adds xgene_enet_get_fpsel() helper
function to get buffer pool number.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/apm/xgene/xgene_enet_cle.c

@@ -346,7 +346,7 @@ static int xgene_cle_set_rss_idt(struct xgene_enet_pdata *pdata)
 	for (i = 0; i < XGENE_CLE_IDT_ENTRIES; i++) {
 		idx = i % pdata->rxq_cnt;
 		pool_id = pdata->rx_ring[idx]->buf_pool->id;
-		fpsel = xgene_enet_ring_bufnum(pool_id) - 0x20;
+		fpsel = xgene_enet_get_fpsel(pool_id);
 		dstqid = xgene_enet_dst_ring_num(pdata->rx_ring[idx]);
 		nfpsel = 0;
 		idt_reg = 0;
@@ -706,7 +706,7 @@ static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
 
 	def_qid = xgene_enet_dst_ring_num(pdata->rx_ring[0]);
 	pool_id = pdata->rx_ring[0]->buf_pool->id;
-	def_fpsel = xgene_enet_ring_bufnum(pool_id) - 0x20;
+	def_fpsel = xgene_enet_get_fpsel(pool_id);
 
 	memset(dbptr, 0, sizeof(struct xgene_cle_dbptr) * DB_MAX_PTRS);
 	dbptr[DB_RES_ACCEPT].fpsel =  def_fpsel;

drivers/net/ethernet/apm/xgene/xgene_enet_hw.c

@@ -555,7 +555,7 @@ static void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
 	u32 cb;
 	u32 fpsel;
 
-	fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
+	fpsel = xgene_enet_get_fpsel(bufpool_id);
 
 	xgene_enet_rd_csr(pdata, CLE_BYPASS_REG0_0_ADDR, &cb);
 	cb |= CFG_CLE_BYPASS_EN0;
@@ -652,16 +652,14 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
 static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 			     struct xgene_enet_desc_ring *ring)
 {
-	u32 addr, val, data;
-
-	val = xgene_enet_ring_bufnum(ring->id);
+	u32 addr, data;
 
 	if (xgene_enet_is_bufpool(ring->id)) {
 		addr = ENET_CFGSSQMIFPRESET_ADDR;
-		data = BIT(val - 0x20);
+		data = BIT(xgene_enet_get_fpsel(ring->id));
 	} else {
 		addr = ENET_CFGSSQMIWQRESET_ADDR;
-		data = BIT(val);
+		data = BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 
 	xgene_enet_wr_ring_if(pdata, addr, data);
@@ -671,24 +669,21 @@ static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
 {
 	struct device *dev = &pdata->pdev->dev;
 	struct xgene_enet_desc_ring *ring;
-	u32 pb, val;
+	u32 pb;
 	int i;
 
 	pb = 0;
 	for (i = 0; i < pdata->rxq_cnt; i++) {
 		ring = pdata->rx_ring[i]->buf_pool;
+		pb |= BIT(xgene_enet_get_fpsel(ring->id));
 
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val - 0x20);
 	}
 	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
 
 	pb = 0;
 	for (i = 0; i < pdata->txq_cnt; i++) {
 		ring = pdata->tx_ring[i];
-
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val);
+		pb |= BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
 

drivers/net/ethernet/apm/xgene/xgene_enet_hw.h

@@ -346,6 +346,14 @@ static inline bool xgene_enet_is_bufpool(u16 id)
 	return ((id & RING_BUFNUM_MASK) >= 0x20) ? true : false;
 }
 
+static inline u8 xgene_enet_get_fpsel(u16 id)
+{
+	if (xgene_enet_is_bufpool(id))
+		return xgene_enet_ring_bufnum(id) - RING_BUFNUM_BUFPOOL;
+
+	return 0;
+}
+
 static inline u16 xgene_enet_get_numslots(u16 id, u32 size)
 {
 	bool is_bufpool = xgene_enet_is_bufpool(id);

drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c

@@ -501,7 +501,7 @@ static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
 	data = CFG_CLE_BYPASS_EN0;
 	xgene_enet_wr_csr(p, cle_bypass_reg0 + offset, data);
 
-	fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
+	fpsel = xgene_enet_get_fpsel(bufpool_id);
 	data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel);
 	xgene_enet_wr_csr(p, cle_bypass_reg1 + offset, data);
 }
@@ -509,16 +509,14 @@ static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
 static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 			     struct xgene_enet_desc_ring *ring)
 {
-	u32 addr, val, data;
-
-	val = xgene_enet_ring_bufnum(ring->id);
+	u32 addr, data;
 
 	if (xgene_enet_is_bufpool(ring->id)) {
 		addr = ENET_CFGSSQMIFPRESET_ADDR;
-		data = BIT(val - 0x20);
+		data = BIT(xgene_enet_get_fpsel(ring->id));
 	} else {
 		addr = ENET_CFGSSQMIWQRESET_ADDR;
-		data = BIT(val);
+		data = BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 
 	xgene_enet_wr_ring_if(pdata, addr, data);
@@ -528,24 +526,20 @@ static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
 {
 	struct device *dev = &p->pdev->dev;
 	struct xgene_enet_desc_ring *ring;
-	u32 pb, val;
+	u32 pb;
 	int i;
 
 	pb = 0;
 	for (i = 0; i < p->rxq_cnt; i++) {
 		ring = p->rx_ring[i]->buf_pool;
-
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val - 0x20);
+		pb |= BIT(xgene_enet_get_fpsel(ring->id));
 	}
 	xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPRESET_ADDR, pb);
 
 	pb = 0;
 	for (i = 0; i < p->txq_cnt; i++) {
 		ring = p->tx_ring[i];
-
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val);
+		pb |= BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 	xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQRESET_ADDR, pb);
 

drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c

@@ -359,7 +359,7 @@ static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
 	CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
 	xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG0_ADDR, cb);
 
-	fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
+	fpsel = xgene_enet_get_fpsel(bufpool_id);
 	xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG1_ADDR, &cb);
 	CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
 	CFG_CLE_FPSEL0_SET(&cb, fpsel);
@@ -370,24 +370,20 @@ static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
 {
 	struct device *dev = &pdata->pdev->dev;
 	struct xgene_enet_desc_ring *ring;
-	u32 pb, val;
+	u32 pb;
 	int i;
 
 	pb = 0;
 	for (i = 0; i < pdata->rxq_cnt; i++) {
 		ring = pdata->rx_ring[i]->buf_pool;
-
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val - 0x20);
+		pb |= BIT(xgene_enet_get_fpsel(ring->id));
 	}
 	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
 
 	pb = 0;
 	for (i = 0; i < pdata->txq_cnt; i++) {
 		ring = pdata->tx_ring[i];
-
-		val = xgene_enet_ring_bufnum(ring->id);
-		pb |= BIT(val);
+		pb |= BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
 
@@ -400,16 +396,14 @@ static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
 static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 			     struct xgene_enet_desc_ring *ring)
 {
-	u32 addr, val, data;
-
-	val = xgene_enet_ring_bufnum(ring->id);
+	u32 addr, data;
 
 	if (xgene_enet_is_bufpool(ring->id)) {
 		addr = ENET_CFGSSQMIFPRESET_ADDR;
-		data = BIT(val - 0x20);
+		data = BIT(xgene_enet_get_fpsel(ring->id));
 	} else {
 		addr = ENET_CFGSSQMIWQRESET_ADDR;
-		data = BIT(val);
+		data = BIT(xgene_enet_ring_bufnum(ring->id));
 	}
 
 	xgene_enet_wr_ring_if(pdata, addr, data);