Merge branch 'Renesas-RSZ-V2M-support'

Phil Edworthy says:

====================
Add Renesas RZ/V2M Ethernet support

The RZ/V2M Ethernet is very similar to R-Car Gen3 Ethernet-AVB, though
some small parts are the same as R-Car Gen2.
Other differences are:
* It has separate data (DI), error (Line 1) and management (Line 2) irqs
  rather than one irq for all three.
* Instead of using the High-speed peripheral bus clock for gPTP, it has
  a separate gPTP reference clock.

v4:
 * Add clk_disable_unprepare() for gptp ref clk

v3:
 * Really renamed irq_en_dis_regs to irq_en_dis this time
 * Modified ravb_ptp_extts() to use irq_en_dis
 * Added Reviewed-by tags

v2:
 * Just net patches in this series
 * Instead of reusing ch22 and ch24 interrupt names, use the proper names
 * Renamed irq_en_dis_regs to irq_en_dis
 * Squashed use of GIC reg versus GIE/GID and got rid of separate gptp_ptm_gic feature.
 * Move err_mgmt_irqs code under multi_irqs
 * Minor editing of the commit msgs
====================

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

Documentation/devicetree/bindings/net/renesas,etheravb.yaml

@@ -43,6 +43,11 @@ properties:
               - renesas,etheravb-r8a779a0     # R-Car V3U
           - const: renesas,etheravb-rcar-gen3 # R-Car Gen3 and RZ/G2
 
+      - items:
+          - enum:
+              - renesas,etheravb-r9a09g011 # RZ/V2M
+          - const: renesas,etheravb-rzv2m  # RZ/V2M compatible
+
       - items:
           - enum:
               - renesas,r9a07g043-gbeth # RZ/G2UL
@@ -160,16 +165,33 @@ allOf:
             - const: arp_ns
         rx-internal-delay-ps: false
     else:
-      properties:
-        interrupts:
-          minItems: 25
-          maxItems: 25
-        interrupt-names:
-          items:
-            pattern: '^ch[0-9]+$'
-      required:
-        - interrupt-names
-        - rx-internal-delay-ps
+      if:
+        properties:
+          compatible:
+            contains:
+              const: renesas,etheravb-rzv2m
+      then:
+        properties:
+          interrupts:
+            minItems: 29
+            maxItems: 29
+          interrupt-names:
+            items:
+              pattern: '^(ch(1?)[0-9])|ch20|ch21|dia|dib|err_a|err_b|mgmt_a|mgmt_b|line3$'
+          rx-internal-delay-ps: false
+        required:
+          - interrupt-names
+      else:
+        properties:
+          interrupts:
+            minItems: 25
+            maxItems: 25
+          interrupt-names:
+            items:
+              pattern: '^ch[0-9]+$'
+        required:
+          - interrupt-names
+          - rx-internal-delay-ps
 
   - if:
       properties:
@@ -231,17 +253,35 @@ allOf:
             - const: chi
             - const: refclk
     else:
-      properties:
-        clocks:
-          minItems: 1
-          items:
-            - description: AVB functional clock
-            - description: Optional TXC reference clock
-        clock-names:
-          minItems: 1
-          items:
-            - const: fck
-            - const: refclk
+      if:
+        properties:
+          compatible:
+            contains:
+              const: renesas,etheravb-rzv2m
+      then:
+        properties:
+          clocks:
+            items:
+              - description: Main clock
+              - description: Coherent Hub Interface clock
+              - description: gPTP reference clock
+          clock-names:
+            items:
+              - const: axi
+              - const: chi
+              - const: gptp
+      else:
+        properties:
+          clocks:
+            minItems: 1
+            items:
+              - description: AVB functional clock
+              - description: Optional TXC reference clock
+          clock-names:
+            minItems: 1
+            items:
+              - const: fck
+              - const: refclk
 
 additionalProperties: false
 

drivers/net/ethernet/renesas/ravb.h

@@ -1027,8 +1027,11 @@ struct ravb_hw_info {
 	unsigned tx_counters:1;		/* E-MAC has TX counters */
 	unsigned carrier_counters:1;	/* E-MAC has carrier counters */
 	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
+	unsigned irq_en_dis:1;		/* Has separate irq enable and disable regs */
+	unsigned err_mgmt_irqs:1;	/* Line1 (Err) and Line2 (Mgmt) irqs are separate */
 	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
 	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
+	unsigned gptp_ref_clk:1;	/* gPTP has separate reference clock */
 	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
 	unsigned magic_pkt:1;		/* E-MAC supports magic packet detection */
 	unsigned half_duplex:1;		/* E-MAC supports half duplex mode */
@@ -1040,6 +1043,7 @@ struct ravb_private {
 	void __iomem *addr;
 	struct clk *clk;
 	struct clk *refclk;
+	struct clk *gptp_clk;
 	struct mdiobb_ctrl mdiobb;
 	u32 num_rx_ring[NUM_RX_QUEUE];
 	u32 num_tx_ring[NUM_TX_QUEUE];
@@ -1077,6 +1081,8 @@ struct ravb_private {
 	int msg_enable;
 	int speed;
 	int emac_irq;
+	int erra_irq;
+	int mgmta_irq;
 	int rx_irqs[NUM_RX_QUEUE];
 	int tx_irqs[NUM_TX_QUEUE];
 

drivers/net/ethernet/renesas/ravb_main.c

@@ -1124,7 +1124,7 @@ static bool ravb_queue_interrupt(struct net_device *ndev, int q)
 	if (((ris0 & ric0) & BIT(q)) || ((tis  & tic)  & BIT(q))) {
 		if (napi_schedule_prep(&priv->napi[q])) {
 			/* Mask RX and TX interrupts */
-			if (!info->multi_irqs) {
+			if (!info->irq_en_dis) {
 				ravb_write(ndev, ric0 & ~BIT(q), RIC0);
 				ravb_write(ndev, tic & ~BIT(q), TIC);
 			} else {
@@ -1306,7 +1306,7 @@ static int ravb_poll(struct napi_struct *napi, int budget)
 
 	/* Re-enable RX/TX interrupts */
 	spin_lock_irqsave(&priv->lock, flags);
-	if (!info->multi_irqs) {
+	if (!info->irq_en_dis) {
 		ravb_modify(ndev, RIC0, mask, mask);
 		ravb_modify(ndev, TIC,  mask, mask);
 	} else {
@@ -1798,12 +1798,23 @@ static int ravb_open(struct net_device *ndev)
 				      ndev, dev, "ch19:tx_nc");
 		if (error)
 			goto out_free_irq_nc_rx;
+
+		if (info->err_mgmt_irqs) {
+			error = ravb_hook_irq(priv->erra_irq, ravb_multi_interrupt,
+					      ndev, dev, "err_a");
+			if (error)
+				goto out_free_irq_nc_tx;
+			error = ravb_hook_irq(priv->mgmta_irq, ravb_multi_interrupt,
+					      ndev, dev, "mgmt_a");
+			if (error)
+				goto out_free_irq_erra;
+		}
 	}
 
 	/* Device init */
 	error = ravb_dmac_init(ndev);
 	if (error)
-		goto out_free_irq_nc_tx;
+		goto out_free_irq_mgmta;
 	ravb_emac_init(ndev);
 
 	/* Initialise PTP Clock driver */
@@ -1823,9 +1834,15 @@ out_ptp_stop:
 	/* Stop PTP Clock driver */
 	if (info->gptp)
 		ravb_ptp_stop(ndev);
-out_free_irq_nc_tx:
+out_free_irq_mgmta:
 	if (!info->multi_irqs)
 		goto out_free_irq;
+	if (info->err_mgmt_irqs)
+		free_irq(priv->mgmta_irq, ndev);
+out_free_irq_erra:
+	if (info->err_mgmt_irqs)
+		free_irq(priv->erra_irq, ndev);
+out_free_irq_nc_tx:
 	free_irq(priv->tx_irqs[RAVB_NC], ndev);
 out_free_irq_nc_rx:
 	free_irq(priv->rx_irqs[RAVB_NC], ndev);
@@ -2166,6 +2183,10 @@ static int ravb_close(struct net_device *ndev)
 		free_irq(priv->tx_irqs[RAVB_BE], ndev);
 		free_irq(priv->rx_irqs[RAVB_BE], ndev);
 		free_irq(priv->emac_irq, ndev);
+		if (info->err_mgmt_irqs) {
+			free_irq(priv->erra_irq, ndev);
+			free_irq(priv->mgmta_irq, ndev);
+		}
 	}
 	free_irq(ndev->irq, ndev);
 
@@ -2410,6 +2431,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
 	.internal_delay = 1,
 	.tx_counters = 1,
 	.multi_irqs = 1,
+	.irq_en_dis = 1,
 	.ccc_gac = 1,
 	.nc_queues = 1,
 	.magic_pkt = 1,
@@ -2438,6 +2460,31 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
 	.magic_pkt = 1,
 };
 
+static const struct ravb_hw_info ravb_rzv2m_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_rcar,
+	.rx_ring_format = ravb_rx_ring_format_rcar,
+	.alloc_rx_desc = ravb_alloc_rx_desc_rcar,
+	.receive = ravb_rx_rcar,
+	.set_rate = ravb_set_rate_rcar,
+	.set_feature = ravb_set_features_rcar,
+	.dmac_init = ravb_dmac_init_rcar,
+	.emac_init = ravb_emac_init_rcar,
+	.gstrings_stats = ravb_gstrings_stats,
+	.gstrings_size = sizeof(ravb_gstrings_stats),
+	.net_hw_features = NETIF_F_RXCSUM,
+	.net_features = NETIF_F_RXCSUM,
+	.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
+	.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+	.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
+	.rx_max_buf_size = SZ_2K,
+	.multi_irqs = 1,
+	.err_mgmt_irqs = 1,
+	.gptp = 1,
+	.gptp_ref_clk = 1,
+	.nc_queues = 1,
+	.magic_pkt = 1,
+};
+
 static const struct ravb_hw_info gbeth_hw_info = {
 	.rx_ring_free = ravb_rx_ring_free_gbeth,
 	.rx_ring_format = ravb_rx_ring_format_gbeth,
@@ -2465,6 +2512,7 @@ static const struct of_device_id ravb_match_table[] = {
 	{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
 	{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
 	{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
 	{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
 	{ }
 };
@@ -2473,11 +2521,15 @@ MODULE_DEVICE_TABLE(of, ravb_match_table);
 static int ravb_set_gti(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
 	struct device *dev = ndev->dev.parent;
 	unsigned long rate;
 	uint64_t inc;
 
-	rate = clk_get_rate(priv->clk);
+	if (info->gptp_ref_clk)
+		rate = clk_get_rate(priv->gptp_clk);
+	else
+		rate = clk_get_rate(priv->clk);
 	if (!rate)
 		return -EINVAL;
 
@@ -2594,10 +2646,14 @@ static int ravb_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	if (info->multi_irqs)
-		irq = platform_get_irq_byname(pdev, "ch22");
-	else
+	if (info->multi_irqs) {
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "dia");
+		else
+			irq = platform_get_irq_byname(pdev, "ch22");
+	} else {
 		irq = platform_get_irq(pdev, 0);
+	}
 	if (irq < 0) {
 		error = irq;
 		goto out_release;
@@ -2639,7 +2695,10 @@ static int ravb_probe(struct platform_device *pdev)
 		of_property_read_bool(np, "renesas,ether-link-active-low");
 
 	if (info->multi_irqs) {
-		irq = platform_get_irq_byname(pdev, "ch24");
+		if (info->err_mgmt_irqs)
+			irq = platform_get_irq_byname(pdev, "line3");
+		else
+			irq = platform_get_irq_byname(pdev, "ch24");
 		if (irq < 0) {
 			error = irq;
 			goto out_release;
@@ -2661,6 +2720,22 @@ static int ravb_probe(struct platform_device *pdev)
 			}
 			priv->tx_irqs[i] = irq;
 		}
+
+		if (info->err_mgmt_irqs) {
+			irq = platform_get_irq_byname(pdev, "err_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->erra_irq = irq;
+
+			irq = platform_get_irq_byname(pdev, "mgmt_a");
+			if (irq < 0) {
+				error = irq;
+				goto out_release;
+			}
+			priv->mgmta_irq = irq;
+		}
 	}
 
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
@@ -2676,6 +2751,15 @@ static int ravb_probe(struct platform_device *pdev)
 	}
 	clk_prepare_enable(priv->refclk);
 
+	if (info->gptp_ref_clk) {
+		priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
+		if (IS_ERR(priv->gptp_clk)) {
+			error = PTR_ERR(priv->gptp_clk);
+			goto out_disable_refclk;
+		}
+		clk_prepare_enable(priv->gptp_clk);
+	}
+
 	ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
 	ndev->min_mtu = ETH_MIN_MTU;
 
@@ -2697,7 +2781,7 @@ static int ravb_probe(struct platform_device *pdev)
 		/* Set GTI value */
 		error = ravb_set_gti(ndev);
 		if (error)
-			goto out_disable_refclk;
+			goto out_disable_gptp_clk;
 
 		/* Request GTI loading */
 		ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
@@ -2717,7 +2801,7 @@ static int ravb_probe(struct platform_device *pdev)
 			"Cannot allocate desc base address table (size %d bytes)\n",
 			priv->desc_bat_size);
 		error = -ENOMEM;
-		goto out_disable_refclk;
+		goto out_disable_gptp_clk;
 	}
 	for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
 		priv->desc_bat[q].die_dt = DT_EOS;
@@ -2780,6 +2864,8 @@ out_dma_free:
 	/* Stop PTP Clock driver */
 	if (info->ccc_gac)
 		ravb_ptp_stop(ndev);
+out_disable_gptp_clk:
+	clk_disable_unprepare(priv->gptp_clk);
 out_disable_refclk:
 	clk_disable_unprepare(priv->refclk);
 out_release:
@@ -2801,6 +2887,7 @@ static int ravb_remove(struct platform_device *pdev)
 	if (info->ccc_gac)
 		ravb_ptp_stop(ndev);
 
+	clk_disable_unprepare(priv->gptp_clk);
 	clk_disable_unprepare(priv->refclk);
 
 	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,

drivers/net/ethernet/renesas/ravb_ptp.c

@@ -198,7 +198,7 @@ static int ravb_ptp_extts(struct ptp_clock_info *ptp,
 	priv->ptp.extts[req->index] = on;
 
 	spin_lock_irqsave(&priv->lock, flags);
-	if (!info->multi_irqs)
+	if (!info->irq_en_dis)
 		ravb_modify(ndev, GIC, GIC_PTCE, on ? GIC_PTCE : 0);
 	else if (on)
 		ravb_write(ndev, GIE_PTCS, GIE);
@@ -254,7 +254,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		error = ravb_ptp_update_compare(priv, (u32)start_ns);
 		if (!error) {
 			/* Unmask interrupt */
-			if (!info->multi_irqs)
+			if (!info->irq_en_dis)
 				ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);
 			else
 				ravb_write(ndev, GIE_PTMS0, GIE);
@@ -266,7 +266,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		perout->period = 0;
 
 		/* Mask interrupt */
-		if (!info->multi_irqs)
+		if (!info->irq_en_dis)
 			ravb_modify(ndev, GIC, GIC_PTME, 0);
 		else
 			ravb_write(ndev, GID_PTMD0, GID);