Merge branch 'gianfar-mq-polling'

Claudiu Manoil says:

====================
net: gianfar: Drop GFAR_MQ_POLLING support

Drop long time obsolete "per NAPI multi-queue" support in gianfar,
and related (and undocumented) device tree properties.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 11 insertions, 209 deletions

diff --git a/arch/powerpc/boot/dts/fsl/bsc9131si-post.dtsi b/arch/powerpc/boot/dts/fsl/bsc9131si-post.dtsi
index 0c0efa94cfb4..2a677fd323eb 100644
--- a/arch/powerpc/boot/dts/fsl/bsc9131si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/bsc9131si-post.dtsi
@@ -170,8 +170,6 @@ timer@41100 {
 /include/ "pq3-etsec2-0.dtsi"
 enet0: ethernet@b0000 {
 	queue-group@b0000 {
-		fsl,rx-bit-map = <0xff>;
-		fsl,tx-bit-map = <0xff>;
 		interrupts = <26 2 0 0 27 2 0 0 28 2 0 0>;
 	};
 };
@@ -179,8 +177,6 @@ enet0: ethernet@b0000 {
 /include/ "pq3-etsec2-1.dtsi"
 enet1: ethernet@b1000 {
 	queue-group@b1000 {
-		fsl,rx-bit-map = <0xff>;
-		fsl,tx-bit-map = <0xff>;
 		interrupts = <33 2 0 0 34 2 0 0 35 2 0 0>;
 	};
 };
diff --git a/arch/powerpc/boot/dts/fsl/bsc9132si-post.dtsi b/arch/powerpc/boot/dts/fsl/bsc9132si-post.dtsi
index b5f071574e83..b8e0edd1ac69 100644
--- a/arch/powerpc/boot/dts/fsl/bsc9132si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/bsc9132si-post.dtsi
@@ -190,8 +190,6 @@ crypto@30000 {
 /include/ "pq3-etsec2-0.dtsi"
 enet0: ethernet@b0000 {
 	queue-group@b0000 {
-		fsl,rx-bit-map = <0xff>;
-		fsl,tx-bit-map = <0xff>;
 		interrupts = <26 2 0 0 27 2 0 0 28 2 0 0>;
 	};
 };
@@ -199,8 +197,6 @@ enet0: ethernet@b0000 {
 /include/ "pq3-etsec2-1.dtsi"
 enet1: ethernet@b1000 {
 	queue-group@b1000 {
-		fsl,rx-bit-map = <0xff>;
-		fsl,tx-bit-map = <0xff>;
 		interrupts = <33 2 0 0 34 2 0 0 35 2 0 0>;
 	};
 };
diff --git a/arch/powerpc/boot/dts/fsl/c293si-post.dtsi b/arch/powerpc/boot/dts/fsl/c293si-post.dtsi
index bd208320bff5..bec0fc36849d 100644
--- a/arch/powerpc/boot/dts/fsl/c293si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/c293si-post.dtsi
@@ -171,8 +171,6 @@
 	enet0: ethernet@b0000 {
 		queue-group@b0000 {
 			reg = <0x10000 0x1000>;
-			fsl,rx-bit-map = <0xff>;
-			fsl,tx-bit-map = <0xff>;
 		};
 	};
 
@@ -180,8 +178,6 @@
 	enet1: ethernet@b1000 {
 		queue-group@b1000 {
 			reg = <0x11000 0x1000>;
-			fsl,rx-bit-map = <0xff>;
-			fsl,tx-bit-map = <0xff>;
 		};
 	};
 
diff --git a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
index 1b4aafc1f6a2..c2717f31925a 100644
--- a/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
@@ -172,29 +172,8 @@
 /include/ "pq3-mpic-timer-B.dtsi"
 
 /include/ "pq3-etsec2-0.dtsi"
-	enet0: ethernet@b0000 {
-		queue-group@b0000 {
-			fsl,rx-bit-map = <0xff>;
-			fsl,tx-bit-map = <0xff>;
-		};
-	};
-
 /include/ "pq3-etsec2-1.dtsi"
-	enet1: ethernet@b1000 {
-		queue-group@b1000 {
-			fsl,rx-bit-map = <0xff>;
-			fsl,tx-bit-map = <0xff>;
-		};
-	};
-
 /include/ "pq3-etsec2-2.dtsi"
-	enet2: ethernet@b2000 {
-		queue-group@b2000 {
-			fsl,rx-bit-map = <0xff>;
-			fsl,tx-bit-map = <0xff>;
-		};
-
-	};
 
 	global-utilities@e0000 {
 		compatible = "fsl,p1010-guts";
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 339f9567ef9d..f2945abdb041 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -175,10 +175,7 @@ static void gfar_mac_rx_config(struct gfar_private *priv)
 	if (priv->rx_filer_enable) {
 		rctrl |= RCTRL_FILREN | RCTRL_PRSDEP_INIT;
 		/* Program the RIR0 reg with the required distribution */
-		if (priv->poll_mode == GFAR_SQ_POLLING)
-			gfar_write(&regs->rir0, DEFAULT_2RXQ_RIR0);
-		else /* GFAR_MQ_POLLING */
-			gfar_write(&regs->rir0, DEFAULT_8RXQ_RIR0);
+		gfar_write(&regs->rir0, DEFAULT_2RXQ_RIR0);
 	}
 
 	/* Restore PROMISC mode */
@@ -521,29 +518,9 @@ static int gfar_parse_group(struct device_node *np,
 	grp->priv = priv;
 	spin_lock_init(&grp->grplock);
 	if (priv->mode == MQ_MG_MODE) {
-		u32 rxq_mask, txq_mask;
-		int ret;
-
+		/* One Q per interrupt group: Q0 to G0, Q1 to G1 */
 		grp->rx_bit_map = (DEFAULT_MAPPING >> priv->num_grps);
 		grp->tx_bit_map = (DEFAULT_MAPPING >> priv->num_grps);
-
-		ret = of_property_read_u32(np, "fsl,rx-bit-map", &rxq_mask);
-		if (!ret) {
-			grp->rx_bit_map = rxq_mask ?
-			rxq_mask : (DEFAULT_MAPPING >> priv->num_grps);
-		}
-
-		ret = of_property_read_u32(np, "fsl,tx-bit-map", &txq_mask);
-		if (!ret) {
-			grp->tx_bit_map = txq_mask ?
-			txq_mask : (DEFAULT_MAPPING >> priv->num_grps);
-		}
-
-		if (priv->poll_mode == GFAR_SQ_POLLING) {
-			/* One Q per interrupt group: Q0 to G0, Q1 to G1 */
-			grp->rx_bit_map = (DEFAULT_MAPPING >> priv->num_grps);
-			grp->tx_bit_map = (DEFAULT_MAPPING >> priv->num_grps);
-		}
 	} else {
 		grp->rx_bit_map = 0xFF;
 		grp->tx_bit_map = 0xFF;
@@ -649,18 +626,15 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
 	u32 stash_len = 0;
 	u32 stash_idx = 0;
 	unsigned int num_tx_qs, num_rx_qs;
-	unsigned short mode, poll_mode;
+	unsigned short mode;
 
 	if (!np)
 		return -ENODEV;
 
-	if (of_device_is_compatible(np, "fsl,etsec2")) {
+	if (of_device_is_compatible(np, "fsl,etsec2"))
 		mode = MQ_MG_MODE;
-		poll_mode = GFAR_SQ_POLLING;
-	} else {
+	else
 		mode = SQ_SG_MODE;
-		poll_mode = GFAR_SQ_POLLING;
-	}
 
 	if (mode == SQ_SG_MODE) {
 		num_tx_qs = 1;
@@ -676,22 +650,8 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
 			return -EINVAL;
 		}
 
-		if (poll_mode == GFAR_SQ_POLLING) {
-			num_tx_qs = num_grps; /* one txq per int group */
-			num_rx_qs = num_grps; /* one rxq per int group */
-		} else { /* GFAR_MQ_POLLING */
-			u32 tx_queues, rx_queues;
-			int ret;
-
-			/* parse the num of HW tx and rx queues */
-			ret = of_property_read_u32(np, "fsl,num_tx_queues",
-						   &tx_queues);
-			num_tx_qs = ret ? 1 : tx_queues;
-
-			ret = of_property_read_u32(np, "fsl,num_rx_queues",
-						   &rx_queues);
-			num_rx_qs = ret ? 1 : rx_queues;
-		}
+		num_tx_qs = num_grps; /* one txq per int group */
+		num_rx_qs = num_grps; /* one rxq per int group */
 	}
 
 	if (num_tx_qs > MAX_TX_QS) {
@@ -717,7 +677,6 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
 	priv->ndev = dev;
 
 	priv->mode = mode;
-	priv->poll_mode = poll_mode;
 
 	priv->num_tx_queues = num_tx_qs;
 	netif_set_real_num_rx_queues(dev, num_rx_qs);
@@ -2691,106 +2650,6 @@ static int gfar_poll_tx_sq(struct napi_struct *napi, int budget)
 	return 0;
 }
 
-static int gfar_poll_rx(struct napi_struct *napi, int budget)
-{
-	struct gfar_priv_grp *gfargrp =
-		container_of(napi, struct gfar_priv_grp, napi_rx);
-	struct gfar_private *priv = gfargrp->priv;
-	struct gfar __iomem *regs = gfargrp->regs;
-	struct gfar_priv_rx_q *rx_queue = NULL;
-	int work_done = 0, work_done_per_q = 0;
-	int i, budget_per_q = 0;
-	unsigned long rstat_rxf;
-	int num_act_queues;
-
-	/* Clear IEVENT, so interrupts aren't called again
-	 * because of the packets that have already arrived
-	 */
-	gfar_write(&regs->ievent, IEVENT_RX_MASK);
-
-	rstat_rxf = gfar_read(&regs->rstat) & RSTAT_RXF_MASK;
-
-	num_act_queues = bitmap_weight(&rstat_rxf, MAX_RX_QS);
-	if (num_act_queues)
-		budget_per_q = budget/num_act_queues;
-
-	for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
-		/* skip queue if not active */
-		if (!(rstat_rxf & (RSTAT_CLEAR_RXF0 >> i)))
-			continue;
-
-		rx_queue = priv->rx_queue[i];
-		work_done_per_q =
-			gfar_clean_rx_ring(rx_queue, budget_per_q);
-		work_done += work_done_per_q;
-
-		/* finished processing this queue */
-		if (work_done_per_q < budget_per_q) {
-			/* clear active queue hw indication */
-			gfar_write(&regs->rstat,
-				   RSTAT_CLEAR_RXF0 >> i);
-			num_act_queues--;
-
-			if (!num_act_queues)
-				break;
-		}
-	}
-
-	if (!num_act_queues) {
-		u32 imask;
-		napi_complete_done(napi, work_done);
-
-		/* Clear the halt bit in RSTAT */
-		gfar_write(&regs->rstat, gfargrp->rstat);
-
-		spin_lock_irq(&gfargrp->grplock);
-		imask = gfar_read(&regs->imask);
-		imask |= IMASK_RX_DEFAULT;
-		gfar_write(&regs->imask, imask);
-		spin_unlock_irq(&gfargrp->grplock);
-	}
-
-	return work_done;
-}
-
-static int gfar_poll_tx(struct napi_struct *napi, int budget)
-{
-	struct gfar_priv_grp *gfargrp =
-		container_of(napi, struct gfar_priv_grp, napi_tx);
-	struct gfar_private *priv = gfargrp->priv;
-	struct gfar __iomem *regs = gfargrp->regs;
-	struct gfar_priv_tx_q *tx_queue = NULL;
-	int has_tx_work = 0;
-	int i;
-
-	/* Clear IEVENT, so interrupts aren't called again
-	 * because of the packets that have already arrived
-	 */
-	gfar_write(&regs->ievent, IEVENT_TX_MASK);
-
-	for_each_set_bit(i, &gfargrp->tx_bit_map, priv->num_tx_queues) {
-		tx_queue = priv->tx_queue[i];
-		/* run Tx cleanup to completion */
-		if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) {
-			gfar_clean_tx_ring(tx_queue);
-			has_tx_work = 1;
-		}
-	}
-
-	if (!has_tx_work) {
-		u32 imask;
-		napi_complete(napi);
-
-		spin_lock_irq(&gfargrp->grplock);
-		imask = gfar_read(&regs->imask);
-		imask |= IMASK_TX_DEFAULT;
-		gfar_write(&regs->imask, imask);
-		spin_unlock_irq(&gfargrp->grplock);
-	}
-
-	return 0;
-}
-
 /* GFAR error interrupt handler */
 static irqreturn_t gfar_error(int irq, void *grp_id)
 {
@@ -3348,17 +3207,10 @@ static int gfar_probe(struct platform_device *ofdev)
 
 	/* Register for napi ...We are registering NAPI for each grp */
 	for (i = 0; i < priv->num_grps; i++) {
-		if (priv->poll_mode == GFAR_SQ_POLLING) {
-			netif_napi_add(dev, &priv->gfargrp[i].napi_rx,
-				       gfar_poll_rx_sq, GFAR_DEV_WEIGHT);
-			netif_tx_napi_add(dev, &priv->gfargrp[i].napi_tx,
-				       gfar_poll_tx_sq, 2);
-		} else {
-			netif_napi_add(dev, &priv->gfargrp[i].napi_rx,
-				       gfar_poll_rx, GFAR_DEV_WEIGHT);
-			netif_tx_napi_add(dev, &priv->gfargrp[i].napi_tx,
-				       gfar_poll_tx, 2);
-		}
+		netif_napi_add(dev, &priv->gfargrp[i].napi_rx,
+			       gfar_poll_rx_sq, GFAR_DEV_WEIGHT);
+		netif_tx_napi_add(dev, &priv->gfargrp[i].napi_tx,
+				  gfar_poll_tx_sq, 2);
 	}
 
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 8ced783f5302..5ea47df93e5e 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -909,22 +909,6 @@ enum {
 	MQ_MG_MODE
 };
 
-/* GFAR_SQ_POLLING: Single Queue NAPI polling mode
- *	The driver supports a single pair of RX/Tx queues
- *	per interrupt group (Rx/Tx int line). MQ_MG mode
- *	devices have 2 interrupt groups, so the device will
- *	have a total of 2 Tx and 2 Rx queues in this case.
- * GFAR_MQ_POLLING: Multi Queue NAPI polling mode
- *	The driver supports all the 8 Rx and Tx HW queues
- *	each queue mapped by the Device Tree to one of
- *	the 2 interrupt groups. This mode implies significant
- *	processing overhead (CPU and controller level).
- */
-enum gfar_poll_mode {
-	GFAR_SQ_POLLING = 0,
-	GFAR_MQ_POLLING
-};
-
 /*
  * Per TX queue stats
  */
@@ -1105,7 +1089,6 @@ struct gfar_private {
 	unsigned long state;
 
 	unsigned short mode;
-	unsigned short poll_mode;
 	unsigned int num_tx_queues;
 	unsigned int num_rx_queues;
 	unsigned int num_grps;