[PATCH] Add IBM PowerPC Virtual Ethernet Driver

drivers/net/Kconfig

@@ -2172,6 +2172,17 @@ config HIPPI
 	  under Linux, say Y here (you must also remember to enable the driver
 	  for your HIPPI card below). Most people will say N here.
 
+config IBMVETH
+	tristate "IBM LAN Virtual Ethernet support"
+	depends on NETDEVICES && NET_ETHERNET && PPC_PSERIES
+	---help---
+	  This driver supports virtual ethernet adapters on newer IBM iSeries
+	  and pSeries systems.
+
+	  To compile this driver as a module, choose M here and read
+	  <file:Documentation/networking/net-modules.txt>. The module will
+	  be called ibmveth.
+
 config ROADRUNNER
 	tristate "Essential RoadRunner HIPPI PCI adapter support (EXPERIMENTAL)"
 	depends on HIPPI && PCI

drivers/net/Makefile

@@ -174,6 +174,7 @@ obj-$(CONFIG_TUN) += tun.o
 obj-$(CONFIG_DL2K) += dl2k.o
 obj-$(CONFIG_R8169) += r8169.o
 obj-$(CONFIG_AMD8111_ETH) += amd8111e.o
+obj-$(CONFIG_IBMVETH) += ibmveth.o
 
 obj-$(CONFIG_ARM) += arm/
 obj-$(CONFIG_NET_FC) += fc/

drivers/net/ibmveth.h

+/**************************************************************************/
+/*                                                                        */
+/* IBM eServer i/[Series Virtual Ethernet Device Driver                   */
+/* Copyright (C) 2003 IBM Corp.                                           */
+/*  Dave Larson (larson1@us.ibm.com)                                      */
+/*  Santiago Leon (santil@us.ibm.com)                                     */
+/*                                                                        */
+/*  This program is free software; you can redistribute it and/or modify  */
+/*  it under the terms of the GNU General Public License as published by  */
+/*  the Free Software Foundation; either version 2 of the License, or     */
+/*  (at your option) any later version.                                   */
+/*                                                                        */
+/*  This program is distributed in the hope that it will be useful,       */
+/*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
+/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
+/*  GNU General Public License for more details.                          */
+/*                                                                        */
+/*  You should have received a copy of the GNU General Public License     */
+/*  along with this program; if not, write to the Free Software           */
+/*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  */
+/*                                                                   USA  */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef _IBMVETH_H
+#define _IBMVETH_H
+
+#define IbmVethMaxSendFrags 6
+
+/* constants for H_MULTICAST_CTRL */
+#define IbmVethMcastReceptionModifyBit     0x80000UL
+#define IbmVethMcastReceptionEnableBit     0x20000UL
+#define IbmVethMcastFilterModifyBit        0x40000UL
+#define IbmVethMcastFilterEnableBit        0x10000UL
+
+#define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
+#define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
+#define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
+#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
+#define IbmVethMcastAddFilter        0x1UL
+#define IbmVethMcastRemoveFilter     0x2UL
+#define IbmVethMcastClearFilterTable 0x3UL
+
+/* hcall numbers */
+#define H_VIO_SIGNAL             0x104
+#define H_REGISTER_LOGICAL_LAN   0x114
+#define H_FREE_LOGICAL_LAN       0x118
+#define H_ADD_LOGICAL_LAN_BUFFER 0x11C
+#define H_SEND_LOGICAL_LAN       0x120
+#define H_MULTICAST_CTRL         0x130
+#define H_CHANGE_LOGICAL_LAN_MAC 0x14C
+
+/* hcall macros */
+#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
+  plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
+
+#define h_free_logical_lan(ua) \
+  plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
+
+#define h_add_logical_lan_buffer(ua, buf) \
+  plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
+
+#define h_send_logical_lan(ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator) \
+  plpar_hcall_8arg_2ret(H_SEND_LOGICAL_LAN, ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator, &correlator)
+
+#define h_multicast_ctrl(ua, cmd, mac) \
+  plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
+
+#define h_change_logical_lan_mac(ua, mac) \
+  plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
+
+#define IbmVethNumBufferPools 3
+#define IbmVethPool0DftSize (1024 * 2)
+#define IbmVethPool1DftSize (1024 * 4)
+#define IbmVethPool2DftSize (1024 * 10)
+#define IbmVethPool0DftCnt  256
+#define IbmVethPool1DftCnt  256
+#define IbmVethPool2DftCnt  256
+
+struct ibmveth_buff_pool {
+    u32 size;
+    u32 index;
+    u32 buff_size;
+    u32 threshold;
+    atomic_t available;
+    u32 consumer_index;
+    u32 producer_index;
+    u16 *free_map;
+    dma_addr_t *dma_addr;
+    struct sk_buff **skbuff;
+};
+
+struct ibmveth_rx_q {
+    u64        index;
+    u64        num_slots;
+    u64        toggle;
+    dma_addr_t queue_dma;
+    u32        queue_len;
+    struct ibmveth_rx_q_entry *queue_addr;
+};
+
+struct ibmveth_adapter {
+    struct vio_dev *vdev;
+    struct net_device *netdev;
+    struct net_device_stats stats;
+    unsigned int mcastFilterSize;
+    unsigned long mac_addr;
+    unsigned long liobn;
+    void * buffer_list_addr;
+    void * filter_list_addr;
+    dma_addr_t buffer_list_dma;
+    dma_addr_t filter_list_dma;
+    struct ibmveth_buff_pool rx_buff_pool[IbmVethNumBufferPools];
+    struct ibmveth_rx_q rx_queue;
+    atomic_t not_replenishing;
+
+    /* helper tasks */
+    struct work_struct replenish_task;
+
+    /* adapter specific stats */
+    u64 replenish_task_cycles;
+    u64 replenish_no_mem;
+    u64 replenish_add_buff_failure;
+    u64 replenish_add_buff_success;
+    u64 rx_invalid_buffer;
+    u64 rx_no_buffer;
+    u64 tx_multidesc_send;
+    u64 tx_linearized;
+    u64 tx_linearize_failed;
+    u64 tx_map_failed;
+    u64 tx_send_failed;
+};
+
+struct ibmveth_buf_desc_fields {	
+    u32 valid : 1;
+    u32 toggle : 1;
+    u32 reserved : 6;
+    u32 length : 24;
+    u32 address;
+};
+
+union ibmveth_buf_desc {
+    u64 desc;	
+    struct ibmveth_buf_desc_fields fields;
+};
+
+struct ibmveth_rx_q_entry {
+    u16 toggle : 1;
+    u16 valid : 1;
+    u16 reserved : 14;
+    u16 offset;
+    u32 length;
+    u64 correlator;
+};
+
+#endif /* _IBMVETH_H */