drivers/net/ethernet/ibm/ibmveth.h

   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, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Copyright (C) IBM Corporation, 2003, 2010
  18  *
  19  * Authors: Dave Larson <larson1@us.ibm.com>
  20  *          Santiago Leon <santil@linux.vnet.ibm.com>
  21  *          Brian King <brking@linux.vnet.ibm.com>
  22  *          Robert Jennings <rcj@linux.vnet.ibm.com>
  23  *          Anton Blanchard <anton@au.ibm.com>
  24  */
  25
  26 #ifndef _IBMVETH_H
  27 #define _IBMVETH_H
  28
  29 /* constants for H_MULTICAST_CTRL */
  30 #define IbmVethMcastReceptionModifyBit     0x80000UL
  31 #define IbmVethMcastReceptionEnableBit     0x20000UL
  32 #define IbmVethMcastFilterModifyBit        0x40000UL
  33 #define IbmVethMcastFilterEnableBit        0x10000UL
  34
  35 #define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
  36 #define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
  37 #define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
  38 #define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
  39 #define IbmVethMcastAddFilter        0x1UL
  40 #define IbmVethMcastRemoveFilter     0x2UL
  41 #define IbmVethMcastClearFilterTable 0x3UL
  42
  43 #define IBMVETH_ILLAN_PADDED_PKT_CSUM   0x0000000000002000UL
  44 #define IBMVETH_ILLAN_TRUNK_PRI_MASK    0x0000000000000F00UL
  45 #define IBMVETH_ILLAN_IPV6_TCP_CSUM             0x0000000000000004UL
  46 #define IBMVETH_ILLAN_IPV4_TCP_CSUM             0x0000000000000002UL
  47 #define IBMVETH_ILLAN_ACTIVE_TRUNK              0x0000000000000001UL
  48
  49 /* hcall macros */
  50 #define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
  51   plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
  52
  53 #define h_free_logical_lan(ua) \
  54   plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
  55
  56 #define h_add_logical_lan_buffer(ua, buf) \
  57   plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
  58
  59 static inline long h_send_logical_lan(unsigned long unit_address,
  60                 unsigned long desc1, unsigned long desc2, unsigned long desc3,
  61                 unsigned long desc4, unsigned long desc5, unsigned long desc6,
  62                 unsigned long corellator_in, unsigned long *corellator_out)
  63 {
  64         long rc;
  65         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
  66
  67         rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
  68                         desc2, desc3, desc4, desc5, desc6, corellator_in);
  69
  70         *corellator_out = retbuf[0];
  71
  72         return rc;
  73 }
  74
  75 static inline long h_illan_attributes(unsigned long unit_address,
  76                                       unsigned long reset_mask, unsigned long set_mask,
  77                                       unsigned long *ret_attributes)
  78 {
  79         long rc;
  80         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
  81
  82         rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
  83                          reset_mask, set_mask);
  84
  85         *ret_attributes = retbuf[0];
  86
  87         return rc;
  88 }
  89
  90 #define h_multicast_ctrl(ua, cmd, mac) \
  91   plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
  92
  93 #define h_change_logical_lan_mac(ua, mac) \
  94   plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
  95
  96 #define IBMVETH_NUM_BUFF_POOLS 5
  97 #define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
  98 #define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
  99 #define IBMVETH_MIN_MTU 68
 100 #define IBMVETH_MAX_POOL_COUNT 4096
 101 #define IBMVETH_BUFF_LIST_SIZE 4096
 102 #define IBMVETH_FILT_LIST_SIZE 4096
 103 #define IBMVETH_MAX_BUF_SIZE (1024 * 128)
 104
 105 static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
 106 static int pool_count[] = { 256, 512, 256, 256, 256 };
 107 static int pool_active[] = { 1, 1, 0, 0, 0};
 108
 109 #define IBM_VETH_INVALID_MAP ((u16)0xffff)
 110
 111 struct ibmveth_buff_pool {
 112     u32 size;
 113     u32 index;
 114     u32 buff_size;
 115     u32 threshold;
 116     atomic_t available;
 117     u32 consumer_index;
 118     u32 producer_index;
 119     u16 *free_map;
 120     dma_addr_t *dma_addr;
 121     struct sk_buff **skbuff;
 122     int active;
 123     struct kobject kobj;
 124 };
 125
 126 struct ibmveth_rx_q {
 127     u64        index;
 128     u64        num_slots;
 129     u64        toggle;
 130     dma_addr_t queue_dma;
 131     u32        queue_len;
 132     struct ibmveth_rx_q_entry *queue_addr;
 133 };
 134
 135 struct ibmveth_adapter {
 136     struct vio_dev *vdev;
 137     struct net_device *netdev;
 138     struct napi_struct napi;
 139     struct net_device_stats stats;
 140     unsigned int mcastFilterSize;
 141     unsigned long mac_addr;
 142     void * buffer_list_addr;
 143     void * filter_list_addr;
 144     dma_addr_t buffer_list_dma;
 145     dma_addr_t filter_list_dma;
 146     struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
 147     struct ibmveth_rx_q rx_queue;
 148     int pool_config;
 149     int rx_csum;
 150     void *bounce_buffer;
 151     dma_addr_t bounce_buffer_dma;
 152
 153     u64 fw_ipv6_csum_support;
 154     u64 fw_ipv4_csum_support;
 155     /* adapter specific stats */
 156     u64 replenish_task_cycles;
 157     u64 replenish_no_mem;
 158     u64 replenish_add_buff_failure;
 159     u64 replenish_add_buff_success;
 160     u64 rx_invalid_buffer;
 161     u64 rx_no_buffer;
 162     u64 tx_map_failed;
 163     u64 tx_send_failed;
 164 };
 165
 166 /*
 167  * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
 168  * so we don't need to byteswap the two elements. However since we use
 169  * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
 170  * do end up with endian specific ordering of the elements and that
 171  * needs correcting.
 172  */
 173 struct ibmveth_buf_desc_fields {
 174 #ifdef __BIG_ENDIAN
 175         u32 flags_len;
 176         u32 address;
 177 #else
 178         u32 address;
 179         u32 flags_len;
 180 #endif
 181 #define IBMVETH_BUF_VALID       0x80000000
 182 #define IBMVETH_BUF_TOGGLE      0x40000000
 183 #define IBMVETH_BUF_NO_CSUM     0x02000000
 184 #define IBMVETH_BUF_CSUM_GOOD   0x01000000
 185 #define IBMVETH_BUF_LEN_MASK    0x00FFFFFF
 186 };
 187
 188 union ibmveth_buf_desc {
 189     u64 desc;
 190     struct ibmveth_buf_desc_fields fields;
 191 };
 192
 193 struct ibmveth_rx_q_entry {
 194         __be32 flags_off;
 195 #define IBMVETH_RXQ_TOGGLE              0x80000000
 196 #define IBMVETH_RXQ_TOGGLE_SHIFT        31
 197 #define IBMVETH_RXQ_VALID               0x40000000
 198 #define IBMVETH_RXQ_NO_CSUM             0x02000000
 199 #define IBMVETH_RXQ_CSUM_GOOD           0x01000000
 200 #define IBMVETH_RXQ_OFF_MASK            0x0000FFFF
 201
 202         __be32 length;
 203         /* correlator is only used by the OS, no need to byte swap */
 204         u64 correlator;
 205 };
 206
 207 #endif /* _IBMVETH_H */