Re: [PATCH net-next 16/19] net: ethernet: ti: cpsw: move common hw init code in separate func

Murali Karicheri <m-karicheri2@xxxxxx> · Thu, 25 Apr 2019 09:38:10 -0400

On 04/23/2019 09:09 AM, Grygorii Strashko wrote:
move common hw init code in separate function as preparation for adding new
switchdev driver.
All of the changes indicates a better name for the file is 
cpsw_common.c; commit log, new function cpsw_init_common() etc. Any 
specific reason to use cpsw_priv.[ch]?


Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
  drivers/net/ethernet/ti/Makefile    |   2 +-
  drivers/net/ethernet/ti/cpsw.c      | 106 ++---------------------
  drivers/net/ethernet/ti/cpsw_priv.c | 128 ++++++++++++++++++++++++++++
  drivers/net/ethernet/ti/cpsw_priv.h |   3 +
  4 files changed, 137 insertions(+), 102 deletions(-)
  create mode 100644 drivers/net/ethernet/ti/cpsw_priv.c

diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
index 2f159a71f88e..de1561596646 100644
--- a/drivers/net/ethernet/ti/Makefile
+++ b/drivers/net/ethernet/ti/Makefile
@@ -14,7 +14,7 @@ obj-$(CONFIG_TI_DAVINCI_MDIO) += davinci_mdio.o
  obj-$(CONFIG_TI_CPSW_PHY_SEL) += cpsw-phy-sel.o
  obj-$(CONFIG_TI_CPTS_MOD) += cpts.o
  obj-$(CONFIG_TI_CPSW) += ti_cpsw.o
-ti_cpsw-y := cpsw.o davinci_cpdma.o cpsw_ale.o
+ti_cpsw-y := cpsw.o davinci_cpdma.o cpsw_ale.o cpsw_priv.o
  
  obj-$(CONFIG_TI_KEYSTONE_NETCP) += keystone_netcp.o
  keystone_netcp-y := netcp_core.o cpsw_ale.o
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 7dffc67f0cf4..a6c3d8be1649 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -3007,16 +3007,12 @@ static int cpsw_probe(struct platform_device *pdev)
  	struct cpsw_platform_data	*data;
  	struct net_device		*ndev;
  	struct cpsw_priv		*priv;
-	struct cpdma_params		dma_params;
-	struct cpsw_ale_params		ale_params;
  	void __iomem			*ss_regs;
-	void __iomem			*cpts_regs;
  	struct resource			*res, *ss_res;
  	struct gpio_descs		*mode;
-	u32 slave_offset, sliver_offset, slave_size;
  	const struct soc_device_attribute *soc;
  	struct cpsw_common		*cpsw;
-	int ret = 0, i, ch;
+	int ret = 0, ch;
  	int irq;
  
  	cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
@@ -3096,103 +3092,12 @@ static int cpsw_probe(struct platform_device *pdev)
  
  	cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
  
-	cpsw->rx_ch_num = 1;
-	cpsw->tx_ch_num = 1;
  
-	cpsw->version = readl(&cpsw->regs->id_ver);
-
-	memset(&dma_params, 0, sizeof(dma_params));
-	memset(&ale_params, 0, sizeof(ale_params));
-
-	switch (cpsw->version) {
-	case CPSW_VERSION_1:
-		cpsw->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
-		cpts_regs		= ss_regs + CPSW1_CPTS_OFFSET;
-		cpsw->hw_stats	     = ss_regs + CPSW1_HW_STATS;
-		dma_params.dmaregs   = ss_regs + CPSW1_CPDMA_OFFSET;
-		dma_params.txhdp     = ss_regs + CPSW1_STATERAM_OFFSET;
-		ale_params.ale_regs  = ss_regs + CPSW1_ALE_OFFSET;
-		slave_offset         = CPSW1_SLAVE_OFFSET;
-		slave_size           = CPSW1_SLAVE_SIZE;
-		sliver_offset        = CPSW1_SLIVER_OFFSET;
-		dma_params.desc_mem_phys = 0;
-		break;
-	case CPSW_VERSION_2:
-	case CPSW_VERSION_3:
-	case CPSW_VERSION_4:
-		cpsw->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
-		cpts_regs		= ss_regs + CPSW2_CPTS_OFFSET;
-		cpsw->hw_stats	     = ss_regs + CPSW2_HW_STATS;
-		dma_params.dmaregs   = ss_regs + CPSW2_CPDMA_OFFSET;
-		dma_params.txhdp     = ss_regs + CPSW2_STATERAM_OFFSET;
-		ale_params.ale_regs  = ss_regs + CPSW2_ALE_OFFSET;
-		slave_offset         = CPSW2_SLAVE_OFFSET;
-		slave_size           = CPSW2_SLAVE_SIZE;
-		sliver_offset        = CPSW2_SLIVER_OFFSET;
-		dma_params.desc_mem_phys =
-			(u32 __force) ss_res->start + CPSW2_BD_OFFSET;
-		break;
-	default:
-		dev_err(dev, "unknown version 0x%08x\n", cpsw->version);
-		ret = -ENODEV;
-		goto clean_dt_ret;
-	}
-
-	for (i = 0; i < cpsw->data.slaves; i++) {
-		struct cpsw_slave *slave = &cpsw->slaves[i];
-		void __iomem		*regs = cpsw->regs;
-
-		slave->slave_num = i;
-		slave->data	= &cpsw->data.slave_data[i];
-		slave->regs	= regs + slave_offset;
-		slave->sliver	= regs + sliver_offset;
-		slave->port_vlan = slave->data->dual_emac_res_vlan;
-
-		slave_offset  += slave_size;
-		sliver_offset += SLIVER_SIZE;
-	}
-
-	ale_params.dev			= dev;
-	ale_params.ale_ageout		= ale_ageout;
-	ale_params.ale_entries		= data->ale_entries;
-	ale_params.ale_ports		= CPSW_ALE_PORTS_NUM;
-
-	cpsw->ale = cpsw_ale_create(&ale_params);
-	if (!cpsw->ale) {
-		dev_err(dev, "error initializing ale engine\n");
-		ret = -ENODEV;
-		goto clean_dt_ret;
-	}
-
-	dma_params.dev		= dev;
-	dma_params.rxthresh	= dma_params.dmaregs + CPDMA_RXTHRESH;
-	dma_params.rxfree	= dma_params.dmaregs + CPDMA_RXFREE;
-	dma_params.rxhdp	= dma_params.txhdp + CPDMA_RXHDP;
-	dma_params.txcp		= dma_params.txhdp + CPDMA_TXCP;
-	dma_params.rxcp		= dma_params.txhdp + CPDMA_RXCP;
-
-	dma_params.num_chan		= data->channels;
-	dma_params.has_soft_reset	= true;
-	dma_params.min_packet_size	= CPSW_MIN_PACKET_SIZE;
-	dma_params.desc_mem_size	= data->bd_ram_size;
-	dma_params.desc_align		= 16;
-	dma_params.has_ext_regs		= true;
-	dma_params.desc_hw_addr         = dma_params.desc_mem_phys;
-	dma_params.bus_freq_mhz		= cpsw->bus_freq_mhz;
-	dma_params.descs_pool_size	= descs_pool_size;
-
-	cpsw->dma = cpdma_ctlr_create(&dma_params);
-	if (!cpsw->dma) {
-		dev_err(dev, "error initializing dma\n");
-		ret = -ENOMEM;
+	ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
+			       (u32 __force)ss_res->start + CPSW2_BD_OFFSET,
+			       descs_pool_size);
+	if (ret)
  		goto clean_dt_ret;
-	}
-
-	cpsw->cpts = cpts_create(cpsw->dev, cpts_regs, cpsw->dev->of_node);
-	if (IS_ERR(cpsw->cpts)) {
-		ret = PTR_ERR(cpsw->cpts);
-		goto clean_dma_ret;
-	}
  
  	ch = cpsw->quirk_irq ? 0 : 7;
  	cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
@@ -3300,7 +3205,6 @@ static int cpsw_probe(struct platform_device *pdev)
  	unregister_netdev(ndev);
  clean_cpts:
  	cpts_release(cpsw->cpts);
-clean_dma_ret:
  	cpdma_ctlr_destroy(cpsw->dma);
  clean_dt_ret:
  	cpsw_remove_dt(pdev);
diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
new file mode 100644
index 000000000000..208c544d0b80
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw_priv.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Texas Instruments Ethernet Switch Driver
+ *
+ * Copyright (C) 2019 Texas Instruments
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+
+#include "cpts.h"
+#include "cpsw_ale.h"
+#include "cpsw_priv.h"
+#include "davinci_cpdma.h"
+
+int cpsw_init_common(struct cpsw_common *cpsw, void __iomem *ss_regs,
+		     int ale_ageout, u32 desc_mem_phys, int descs_pool_size)
+{
+	u32 slave_offset, sliver_offset, slave_size;
+	struct cpsw_ale_params ale_params;
+	struct cpsw_platform_data *data;
+	struct cpdma_params dma_params;
+	struct device *dev = cpsw->dev;
+	void __iomem *cpts_regs;
+	int ret = 0, i;
+
+	data = &cpsw->data;
+	cpsw->rx_ch_num = 1;
+	cpsw->tx_ch_num = 1;
+
+	cpsw->version = readl(&cpsw->regs->id_ver);
+
+	memset(&dma_params, 0, sizeof(dma_params));
+	memset(&ale_params, 0, sizeof(ale_params));
+
+	switch (cpsw->version) {
+	case CPSW_VERSION_1:
+		cpsw->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
+		cpts_regs	     = ss_regs + CPSW1_CPTS_OFFSET;
+		cpsw->hw_stats	     = ss_regs + CPSW1_HW_STATS;
+		dma_params.dmaregs   = ss_regs + CPSW1_CPDMA_OFFSET;
+		dma_params.txhdp     = ss_regs + CPSW1_STATERAM_OFFSET;
+		ale_params.ale_regs  = ss_regs + CPSW1_ALE_OFFSET;
+		slave_offset         = CPSW1_SLAVE_OFFSET;
+		slave_size           = CPSW1_SLAVE_SIZE;
+		sliver_offset        = CPSW1_SLIVER_OFFSET;
+		dma_params.desc_mem_phys = 0;
+		break;
+	case CPSW_VERSION_2:
+	case CPSW_VERSION_3:
+	case CPSW_VERSION_4:
+		cpsw->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
+		cpts_regs	     = ss_regs + CPSW2_CPTS_OFFSET;
+		cpsw->hw_stats	     = ss_regs + CPSW2_HW_STATS;
+		dma_params.dmaregs   = ss_regs + CPSW2_CPDMA_OFFSET;
+		dma_params.txhdp     = ss_regs + CPSW2_STATERAM_OFFSET;
+		ale_params.ale_regs  = ss_regs + CPSW2_ALE_OFFSET;
+		slave_offset         = CPSW2_SLAVE_OFFSET;
+		slave_size           = CPSW2_SLAVE_SIZE;
+		sliver_offset        = CPSW2_SLIVER_OFFSET;
+		dma_params.desc_mem_phys = desc_mem_phys;
+		break;
+	default:
+		dev_err(dev, "unknown version 0x%08x\n", cpsw->version);
+		return -ENODEV;
+	}
+
+	for (i = 0; i < cpsw->data.slaves; i++) {
+		struct cpsw_slave *slave = &cpsw->slaves[i];
+		void __iomem		*regs = cpsw->regs;
+
+		slave->slave_num = i;
+		slave->data	= &cpsw->data.slave_data[i];
+		slave->regs	= regs + slave_offset;
+		slave->sliver	= regs + sliver_offset;
+		slave->port_vlan = slave->data->dual_emac_res_vlan;
+
+		slave_offset  += slave_size;
+		sliver_offset += SLIVER_SIZE;
+	}
+
+	ale_params.dev			= dev;
+	ale_params.ale_ageout		= ale_ageout;
+	ale_params.ale_entries		= data->ale_entries;
+	ale_params.ale_ports		= CPSW_ALE_PORTS_NUM;
+
+	cpsw->ale = cpsw_ale_create(&ale_params);
+	if (!cpsw->ale) {
+		dev_err(dev, "error initializing ale engine\n");
+		return -ENODEV;
+	}
+
+	dma_params.dev		= dev;
+	dma_params.rxthresh	= dma_params.dmaregs + CPDMA_RXTHRESH;
+	dma_params.rxfree	= dma_params.dmaregs + CPDMA_RXFREE;
+	dma_params.rxhdp	= dma_params.txhdp + CPDMA_RXHDP;
+	dma_params.txcp		= dma_params.txhdp + CPDMA_TXCP;
+	dma_params.rxcp		= dma_params.txhdp + CPDMA_RXCP;
+
+	dma_params.num_chan		= data->channels;
+	dma_params.has_soft_reset	= true;
+	dma_params.min_packet_size	= CPSW_MIN_PACKET_SIZE;
+	dma_params.desc_mem_size	= data->bd_ram_size;
+	dma_params.desc_align		= 16;
+	dma_params.has_ext_regs		= true;
+	dma_params.desc_hw_addr         = dma_params.desc_mem_phys;
+	dma_params.bus_freq_mhz		= cpsw->bus_freq_mhz;
+	dma_params.descs_pool_size	= descs_pool_size;
+
+	cpsw->dma = cpdma_ctlr_create(&dma_params);
+	if (!cpsw->dma) {
+		dev_err(dev, "error initializing dma\n");
+		return -ENOMEM;
+	}
+
+	cpsw->cpts = cpts_create(cpsw->dev, cpts_regs, cpsw->dev->of_node);
+	if (IS_ERR(cpsw->cpts)) {
+		ret = PTR_ERR(cpsw->cpts);
+		cpdma_ctlr_destroy(cpsw->dma);
+	}
+
+	return ret;
+}
diff --git a/drivers/net/ethernet/ti/cpsw_priv.h b/drivers/net/ethernet/ti/cpsw_priv.h
index 8df9ce68696a..4004140fc4d0 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.h
+++ b/drivers/net/ethernet/ti/cpsw_priv.h
@@ -447,4 +447,7 @@ struct addr_sync_ctx {
  	int flush;		/* flush flag */
  };
  
+int cpsw_init_common(struct cpsw_common *cpsw, void __iomem *ss_regs,
+		     int ale_ageout, u32 desc_mem_phys, int descs_pool_size);
+
  #endif /* DRIVERS_NET_ETHERNET_TI_CPSW_PRIV_H_ */







