drivers: net: xgene: Add 10GbE support with ring manager v2

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

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

@@ -102,6 +102,7 @@ enum xgene_enet_rm {
 
 #define BLOCK_ETH_CSR_OFFSET		0x2000
 #define BLOCK_ETH_RING_IF_OFFSET	0x9000
+#define BLOCK_ETH_CLKRST_CSR_OFFSET	0xc000
 #define BLOCK_ETH_DIAG_CSR_OFFSET	0xD000
 
 #define BLOCK_ETH_MAC_OFFSET		0x0000

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

@@ -28,6 +28,8 @@
 #define RES_RING_CSR	1
 #define RES_RING_CMD	2
 
+static const struct of_device_id xgene_enet_of_match[];
+
 static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool)
 {
 	struct xgene_enet_raw_desc16 *raw_desc;
@@ -632,6 +634,25 @@ static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata)
 	}
 }
 
+static bool is_irq_mbox_required(struct xgene_enet_pdata *pdata,
+				 struct xgene_enet_desc_ring *ring)
+{
+	if ((pdata->enet_id == XGENE_ENET2) &&
+	    (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)) {
+		return true;
+	}
+
+	return false;
+}
+
+static void __iomem *xgene_enet_ring_cmd_base(struct xgene_enet_pdata *pdata,
+					      struct xgene_enet_desc_ring *ring)
+{
+	u8 num_ring_id_shift = pdata->ring_ops->num_ring_id_shift;
+
+	return pdata->ring_cmd_addr + (ring->num << num_ring_id_shift);
+}
+
 static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring(
 			struct net_device *ndev, u32 ring_num,
 			enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id)
@@ -663,7 +684,18 @@ static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring(
 	}
 	ring->size = size;
 
-	ring->cmd_base = pdata->ring_cmd_addr + (ring->num << 6);
+	if (is_irq_mbox_required(pdata, ring)) {
+		ring->irq_mbox_addr = dma_zalloc_coherent(dev, INTR_MBOX_SIZE,
+				&ring->irq_mbox_dma, GFP_KERNEL);
+		if (!ring->irq_mbox_addr) {
+			dma_free_coherent(dev, size, ring->desc_addr,
+					  ring->dma);
+			devm_kfree(dev, ring);
+			return NULL;
+		}
+	}
+
+	ring->cmd_base = xgene_enet_ring_cmd_base(pdata, ring);
 	ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR;
 	ring = pdata->ring_ops->setup(ring);
 	netdev_dbg(ndev, "ring info: num=%d  size=%d  id=%d  slots=%d\n",
@@ -677,12 +709,34 @@ static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum)
 	return (owner << 6) | (bufnum & GENMASK(5, 0));
 }
 
+static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p)
+{
+	enum xgene_ring_owner owner;
+
+	if (p->enet_id == XGENE_ENET1) {
+		switch (p->phy_mode) {
+		case PHY_INTERFACE_MODE_SGMII:
+			owner = RING_OWNER_ETH0;
+			break;
+		default:
+			owner = (!p->port_id) ? RING_OWNER_ETH0 :
+						RING_OWNER_ETH1;
+			break;
+		}
+	} else {
+		owner = (!p->port_id) ? RING_OWNER_ETH0 : RING_OWNER_ETH1;
+	}
+
+	return owner;
+}
+
 static int xgene_enet_create_desc_rings(struct net_device *ndev)
 {
 	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
 	struct device *dev = ndev_to_dev(ndev);
 	struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring;
 	struct xgene_enet_desc_ring *buf_pool = NULL;
+	enum xgene_ring_owner owner;
 	u8 cpu_bufnum = pdata->cpu_bufnum;
 	u8 eth_bufnum = pdata->eth_bufnum;
 	u8 bp_bufnum = pdata->bp_bufnum;
@@ -691,6 +745,7 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 	int ret;
 
 	/* allocate rx descriptor ring */
+	owner = xgene_derive_ring_owner(pdata);
 	ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++);
 	rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
 					      RING_CFGSIZE_16KB, ring_id);
@@ -700,7 +755,8 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 	}
 
 	/* allocate buffer pool for receiving packets */
-	ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, bp_bufnum++);
+	owner = xgene_derive_ring_owner(pdata);
+	ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++);
 	buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++,
 					       RING_CFGSIZE_2KB, ring_id);
 	if (!buf_pool) {
@@ -729,7 +785,8 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 	pdata->rx_ring = rx_ring;
 
 	/* allocate tx descriptor ring */
-	ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, eth_bufnum++);
+	owner = xgene_derive_ring_owner(pdata);
+	ring_id = xgene_enet_get_ring_id(owner, eth_bufnum++);
 	tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
 					      RING_CFGSIZE_16KB, ring_id);
 	if (!tx_ring) {
@@ -957,7 +1014,10 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 		pdata->clk = NULL;
 	}
 
-	base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET);
+	if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII)
+		base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET);
+	else
+		base_addr = pdata->base_addr;
 	pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET;
 	pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET;
 	pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET;
@@ -1029,24 +1089,44 @@ static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata)
 		break;
 	}
 
-	switch (pdata->port_id) {
-	case 0:
-		pdata->cpu_bufnum = START_CPU_BUFNUM_0;
-		pdata->eth_bufnum = START_ETH_BUFNUM_0;
-		pdata->bp_bufnum = START_BP_BUFNUM_0;
-		pdata->ring_num = START_RING_NUM_0;
-		break;
-	case 1:
-		pdata->cpu_bufnum = START_CPU_BUFNUM_1;
-		pdata->eth_bufnum = START_ETH_BUFNUM_1;
-		pdata->bp_bufnum = START_BP_BUFNUM_1;
-		pdata->ring_num = START_RING_NUM_1;
-		break;
-	default:
-		break;
+	if (pdata->enet_id == XGENE_ENET1) {
+		switch (pdata->port_id) {
+		case 0:
+			pdata->cpu_bufnum = START_CPU_BUFNUM_0;
+			pdata->eth_bufnum = START_ETH_BUFNUM_0;
+			pdata->bp_bufnum = START_BP_BUFNUM_0;
+			pdata->ring_num = START_RING_NUM_0;
+			break;
+		case 1:
+			pdata->cpu_bufnum = START_CPU_BUFNUM_1;
+			pdata->eth_bufnum = START_ETH_BUFNUM_1;
+			pdata->bp_bufnum = START_BP_BUFNUM_1;
+			pdata->ring_num = START_RING_NUM_1;
+			break;
+		default:
+			break;
+		}
+		pdata->ring_ops = &xgene_ring1_ops;
+	} else {
+		switch (pdata->port_id) {
+		case 0:
+			pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0;
+			pdata->eth_bufnum = X2_START_ETH_BUFNUM_0;
+			pdata->bp_bufnum = X2_START_BP_BUFNUM_0;
+			pdata->ring_num = X2_START_RING_NUM_0;
+			break;
+		case 1:
+			pdata->cpu_bufnum = X2_START_CPU_BUFNUM_1;
+			pdata->eth_bufnum = X2_START_ETH_BUFNUM_1;
+			pdata->bp_bufnum = X2_START_BP_BUFNUM_1;
+			pdata->ring_num = X2_START_RING_NUM_1;
+			break;
+		default:
+			break;
+		}
+		pdata->rm = RM0;
+		pdata->ring_ops = &xgene_ring2_ops;
 	}
-
-	pdata->ring_ops = &xgene_ring1_ops;
 }
 
 static void xgene_enet_napi_add(struct xgene_enet_pdata *pdata)
@@ -1082,6 +1162,7 @@ static int xgene_enet_probe(struct platform_device *pdev)
 	struct xgene_enet_pdata *pdata;
 	struct device *dev = &pdev->dev;
 	struct xgene_mac_ops *mac_ops;
+	const struct of_device_id *of_id;
 	int ret;
 
 	ndev = alloc_etherdev(sizeof(struct xgene_enet_pdata));
@@ -1100,6 +1181,17 @@ static int xgene_enet_probe(struct platform_device *pdev)
 			  NETIF_F_GSO |
 			  NETIF_F_GRO;
 
+#ifdef CONFIG_OF
+	of_id = of_match_device(xgene_enet_of_match, &pdev->dev);
+	if (of_id) {
+		pdata->enet_id = (enum xgene_enet_id)of_id->data;
+		if (!pdata->enet_id) {
+			free_netdev(ndev);
+			return -ENODEV;
+		}
+	}
+#endif
+
 	ret = xgene_enet_get_resources(pdata);
 	if (ret)
 		goto err;
@@ -1171,9 +1263,10 @@ MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match);
 
 #ifdef CONFIG_OF
 static const struct of_device_id xgene_enet_of_match[] = {
-	{.compatible = "apm,xgene-enet",},
-	{.compatible = "apm,xgene1-sgenet",},
-	{.compatible = "apm,xgene1-xgenet",},
+	{.compatible = "apm,xgene-enet",    .data = (void *)XGENE_ENET1},
+	{.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1},
+	{.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1},
+	{.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2},
 	{},
 };
 

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

@@ -35,6 +35,7 @@
 #include <linux/if_vlan.h>
 #include <linux/phy.h>
 #include "xgene_enet_hw.h"
+#include "xgene_enet_ring2.h"
 
 #define XGENE_DRV_VERSION	"v1.0"
 #define XGENE_ENET_MAX_MTU	1536
@@ -51,12 +52,27 @@
 #define START_BP_BUFNUM_1	0x2A
 #define START_RING_NUM_1	264
 
+#define X2_START_CPU_BUFNUM_0	0
+#define X2_START_ETH_BUFNUM_0	0
+#define X2_START_BP_BUFNUM_0	0x20
+#define X2_START_RING_NUM_0	0
+
+#define X2_START_CPU_BUFNUM_1	0xc
+#define X2_START_ETH_BUFNUM_1	0
+#define X2_START_BP_BUFNUM_1	0x20
+#define X2_START_RING_NUM_1	256
+
 #define IRQ_ID_SIZE		16
 #define XGENE_MAX_TXC_RINGS	1
 
 #define PHY_POLL_LINK_ON	(10 * HZ)
 #define PHY_POLL_LINK_OFF	(PHY_POLL_LINK_ON / 5)
 
+enum xgene_enet_id {
+	XGENE_ENET1 = 1,
+	XGENE_ENET2
+};
+
 /* software context of a descriptor ring */
 struct xgene_enet_desc_ring {
 	struct net_device *ndev;
@@ -124,6 +140,7 @@ struct xgene_enet_pdata {
 	int phy_speed;
 	struct clk *clk;
 	struct platform_device *pdev;
+	enum xgene_enet_id enet_id;
 	struct xgene_enet_desc_ring *tx_ring;
 	struct xgene_enet_desc_ring *rx_ring;
 	char *dev_name;

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

@@ -122,7 +122,6 @@ static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
 
 	return true;
 }
-
 static void xgene_enet_rd_mac(struct xgene_enet_pdata *pdata,
 			      u32 rd_addr, u32 *rd_data)
 {

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

@@ -24,6 +24,23 @@
 #define BLOCK_AXG_MAC_OFFSET		0x0800
 #define BLOCK_AXG_MAC_CSR_OFFSET	0x2000
 
+#define XGENET_SRST_ADDR		0x0000
+#define XGENET_CLKEN_ADDR		0x0008
+
+#define CSR_CLK		BIT(0)
+#define XGENET_CLK	BIT(1)
+#define PCS_CLK		BIT(3)
+#define AN_REF_CLK	BIT(4)
+#define AN_CLK		BIT(5)
+#define AD_CLK		BIT(6)
+
+#define CSR_RST		BIT(0)
+#define XGENET_RST	BIT(1)
+#define PCS_RST		BIT(3)
+#define AN_REF_RST	BIT(4)
+#define AN_RST		BIT(5)
+#define AD_RST		BIT(6)
+
 #define AXGMAC_CONFIG_0			0x0000
 #define AXGMAC_CONFIG_1			0x0004
 #define HSTMACRST			BIT(31)