linux/drivers/net/ibmveth.h
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   1/*
   2 * IBM Power Virtual Ethernet Device Driver
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 *
  18 * Copyright (C) IBM Corporation, 2003, 2010
  19 *
  20 * Authors: Dave Larson <larson1@us.ibm.com>
  21 *          Santiago Leon <santil@linux.vnet.ibm.com>
  22 *          Brian King <brking@linux.vnet.ibm.com>
  23 *          Robert Jennings <rcj@linux.vnet.ibm.com>
  24 *          Anton Blanchard <anton@au.ibm.com>
  25 */
  26
  27#ifndef _IBMVETH_H
  28#define _IBMVETH_H
  29
  30/* constants for H_MULTICAST_CTRL */
  31#define IbmVethMcastReceptionModifyBit     0x80000UL
  32#define IbmVethMcastReceptionEnableBit     0x20000UL
  33#define IbmVethMcastFilterModifyBit        0x40000UL
  34#define IbmVethMcastFilterEnableBit        0x10000UL
  35
  36#define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
  37#define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
  38#define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
  39#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
  40#define IbmVethMcastAddFilter        0x1UL
  41#define IbmVethMcastRemoveFilter     0x2UL
  42#define IbmVethMcastClearFilterTable 0x3UL
  43
  44#define IBMVETH_ILLAN_PADDED_PKT_CSUM   0x0000000000002000UL
  45#define IBMVETH_ILLAN_TRUNK_PRI_MASK    0x0000000000000F00UL
  46#define IBMVETH_ILLAN_IPV6_TCP_CSUM             0x0000000000000004UL
  47#define IBMVETH_ILLAN_IPV4_TCP_CSUM             0x0000000000000002UL
  48#define IBMVETH_ILLAN_ACTIVE_TRUNK              0x0000000000000001UL
  49
  50/* hcall macros */
  51#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
  52  plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
  53
  54#define h_free_logical_lan(ua) \
  55  plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
  56
  57#define h_add_logical_lan_buffer(ua, buf) \
  58  plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
  59
  60static inline long h_send_logical_lan(unsigned long unit_address,
  61                unsigned long desc1, unsigned long desc2, unsigned long desc3,
  62                unsigned long desc4, unsigned long desc5, unsigned long desc6,
  63                unsigned long corellator_in, unsigned long *corellator_out)
  64{
  65        long rc;
  66        unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
  67
  68        rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
  69                        desc2, desc3, desc4, desc5, desc6, corellator_in);
  70
  71        *corellator_out = retbuf[0];
  72
  73        return rc;
  74}
  75
  76static inline long h_illan_attributes(unsigned long unit_address,
  77                                      unsigned long reset_mask, unsigned long set_mask,
  78                                      unsigned long *ret_attributes)
  79{
  80        long rc;
  81        unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
  82
  83        rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
  84                         reset_mask, set_mask);
  85
  86        *ret_attributes = retbuf[0];
  87
  88        return rc;
  89}
  90
  91#define h_multicast_ctrl(ua, cmd, mac) \
  92  plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
  93
  94#define h_change_logical_lan_mac(ua, mac) \
  95  plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
  96
  97#define IBMVETH_NUM_BUFF_POOLS 5
  98#define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
  99#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
 100#define IBMVETH_MIN_MTU 68
 101#define IBMVETH_MAX_POOL_COUNT 4096
 102#define IBMVETH_BUFF_LIST_SIZE 4096
 103#define IBMVETH_FILT_LIST_SIZE 4096
 104#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
 105
 106static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
 107static int pool_count[] = { 256, 512, 256, 256, 256 };
 108static int pool_active[] = { 1, 1, 0, 0, 0};
 109
 110#define IBM_VETH_INVALID_MAP ((u16)0xffff)
 111
 112struct ibmveth_buff_pool {
 113    u32 size;
 114    u32 index;
 115    u32 buff_size;
 116    u32 threshold;
 117    atomic_t available;
 118    u32 consumer_index;
 119    u32 producer_index;
 120    u16 *free_map;
 121    dma_addr_t *dma_addr;
 122    struct sk_buff **skbuff;
 123    int active;
 124    struct kobject kobj;
 125};
 126
 127struct ibmveth_rx_q {
 128    u64        index;
 129    u64        num_slots;
 130    u64        toggle;
 131    dma_addr_t queue_dma;
 132    u32        queue_len;
 133    struct ibmveth_rx_q_entry *queue_addr;
 134};
 135
 136struct ibmveth_adapter {
 137    struct vio_dev *vdev;
 138    struct net_device *netdev;
 139    struct napi_struct napi;
 140    struct net_device_stats stats;
 141    unsigned int mcastFilterSize;
 142    unsigned long mac_addr;
 143    void * buffer_list_addr;
 144    void * filter_list_addr;
 145    dma_addr_t buffer_list_dma;
 146    dma_addr_t filter_list_dma;
 147    struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
 148    struct ibmveth_rx_q rx_queue;
 149    int pool_config;
 150    int rx_csum;
 151    void *bounce_buffer;
 152    dma_addr_t bounce_buffer_dma;
 153
 154    u64 fw_ipv6_csum_support;
 155    u64 fw_ipv4_csum_support;
 156    /* adapter specific stats */
 157    u64 replenish_task_cycles;
 158    u64 replenish_no_mem;
 159    u64 replenish_add_buff_failure;
 160    u64 replenish_add_buff_success;
 161    u64 rx_invalid_buffer;
 162    u64 rx_no_buffer;
 163    u64 tx_map_failed;
 164    u64 tx_send_failed;
 165};
 166
 167struct ibmveth_buf_desc_fields {
 168        u32 flags_len;
 169#define IBMVETH_BUF_VALID       0x80000000
 170#define IBMVETH_BUF_TOGGLE      0x40000000
 171#define IBMVETH_BUF_NO_CSUM     0x02000000
 172#define IBMVETH_BUF_CSUM_GOOD   0x01000000
 173#define IBMVETH_BUF_LEN_MASK    0x00FFFFFF
 174        u32 address;
 175};
 176
 177union ibmveth_buf_desc {
 178    u64 desc;
 179    struct ibmveth_buf_desc_fields fields;
 180};
 181
 182struct ibmveth_rx_q_entry {
 183        u32 flags_off;
 184#define IBMVETH_RXQ_TOGGLE              0x80000000
 185#define IBMVETH_RXQ_TOGGLE_SHIFT        31
 186#define IBMVETH_RXQ_VALID               0x40000000
 187#define IBMVETH_RXQ_NO_CSUM             0x02000000
 188#define IBMVETH_RXQ_CSUM_GOOD           0x01000000
 189#define IBMVETH_RXQ_OFF_MASK            0x0000FFFF
 190
 191        u32 length;
 192        u64 correlator;
 193};
 194
 195#endif /* _IBMVETH_H */
 196