be2net: Use Kconfig flag to support for enabling/disabling adapters

Add flags to enable/disable supported chips in be2net.

With disable support are removed coresponding PCI IDs and
also codepaths with [BE2|BE3|BEx|lancer|skyhawk]_chip checks.

Disable chip will reduce module size by:
BE2 ~2kb
BE3 ~3kb
Lancer ~10kb
Skyhawk ~9kb

When enable skyhawk only it will reduce module size by ~20kb

New help style in Kconfig

Reviewed-by: Ivan Vecera <[e-mail]>
Signed-off-by: Petr Oros <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/emulex/benet/Kconfig

···
 config BE2NET
 	tristate "ServerEngines' 10Gbps NIC - BladeEngine"
 	depends on PCI
-	---help---
+	help
 	  This driver implements the NIC functionality for ServerEngines'
 	  10Gbps network adapter - BladeEngine.
 
···
 	depends on BE2NET && HWMON
 	depends on !(BE2NET=y && HWMON=m)
 	default y
-	---help---
+	help
 	  Say Y here if you want to expose thermal sensor data on
 	  be2net network adapter.
+
+config BE2NET_BE2
+	bool "Support for BE2 chipsets"
+	depends on BE2NET
+	default y
+	help
+	  Say Y here if you want to use devices based on BE2
+	  chipsets. (e.g. OneConnect OCe10xxx)
+
+config BE2NET_BE3
+	bool "Support for BE3 chipsets"
+	depends on BE2NET
+	default y
+	help
+	  Say Y here if you want to use devices based on BE3
+	  chipsets. (e.g. OneConnect OCe11xxx)
+
+config BE2NET_LANCER
+	bool "Support for Lancer chipsets"
+	depends on BE2NET
+	default y
+	help
+	  Say Y here if you want to use devices based on Lancer
+	  chipsets. (e.g LightPulse LPe12xxx)
+
+config BE2NET_SKYHAWK
+	bool "Support for Skyhawk chipsets"
+	depends on BE2NET
+	default y
+	help
+	  Say Y here if you want to use devices based on Skyhawk
+	  chipsets. (e.g. OneConnect OCe14xxx)
+
+comment "WARNING: be2net is useless without any enabled chip"
+        depends on BE2NET_BE2=n && BE2NET_BE3=n && BE2NET_LANCER=n && \
+	BE2NET_SKYHAWK=n && BE2NET

drivers/net/ethernet/emulex/benet/be.h

···
 /* Is BE in QNQ multi-channel mode */
 #define be_is_qnq_mode(adapter)		(adapter->function_mode & QNQ_MODE)
 
+#ifdef CONFIG_BE2NET_LANCER
 #define lancer_chip(adapter)	(adapter->pdev->device == OC_DEVICE_ID3 || \
 				 adapter->pdev->device == OC_DEVICE_ID4)
+#else
+#define lancer_chip(adapter)	(0)
+#endif /* CONFIG_BE2NET_LANCER */
 
+#ifdef CONFIG_BE2NET_SKYHAWK
 #define skyhawk_chip(adapter)	(adapter->pdev->device == OC_DEVICE_ID5 || \
 				 adapter->pdev->device == OC_DEVICE_ID6)
+#else
+#define skyhawk_chip(adapter)	(0)
+#endif /* CONFIG_BE2NET_SKYHAWK */
 
+#ifdef CONFIG_BE2NET_BE3
 #define BE3_chip(adapter)	(adapter->pdev->device == BE_DEVICE_ID2 || \
 				 adapter->pdev->device == OC_DEVICE_ID2)
+#else
+#define BE3_chip(adapter)	(0)
+#endif /* CONFIG_BE2NET_BE3 */
 
+#ifdef CONFIG_BE2NET_BE2
 #define BE2_chip(adapter)	(adapter->pdev->device == BE_DEVICE_ID1 || \
 				 adapter->pdev->device == OC_DEVICE_ID1)
+#else
+#define BE2_chip(adapter)	(0)
+#endif /* CONFIG_BE2NET_BE2 */
 
 #define BEx_chip(adapter)	(BE3_chip(adapter) || BE2_chip(adapter))
 

drivers/net/ethernet/emulex/benet/be_main.c

···
 static struct workqueue_struct *be_err_recovery_workq;
 
 static const struct pci_device_id be_dev_ids[] = {
+#ifdef CONFIG_BE2NET_BE2
 	{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
-	{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID2) },
 	{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
+#endif /* CONFIG_BE2NET_BE2 */
+#ifdef CONFIG_BE2NET_BE3
+	{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID2) },
 	{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
+#endif /* CONFIG_BE2NET_BE3 */
+#ifdef CONFIG_BE2NET_LANCER
 	{ PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID3)},
 	{ PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID4)},
+#endif /* CONFIG_BE2NET_LANCER */
+#ifdef CONFIG_BE2NET_SKYHAWK
 	{ PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID5)},
 	{ PCI_DEVICE(EMULEX_VENDOR_ID, OC_DEVICE_ID6)},
+#endif /* CONFIG_BE2NET_SKYHAWK */
 	{ 0 }
 };
 MODULE_DEVICE_TABLE(pci, be_dev_ids);