drivers/net/ibm_emac/ibm_emac_core.h

   1 /*
   2  * drivers/net/ibm_emac/ibm_emac_core.h
   3  *
   4  * Driver for PowerPC 4xx on-chip ethernet controller.
   5  *
   6  * Copyright (c) 2004, 2005 Zultys Technologies.
   7  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
   8  *
   9  * Based on original work by
  10  *      Armin Kuster <akuster@mvista.com>
  11  *      Johnnie Peters <jpeters@mvista.com>
  12  *      Copyright 2000, 2001 MontaVista Softare Inc.
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  *
  19  */
  20 #ifndef __IBM_EMAC_CORE_H_
  21 #define __IBM_EMAC_CORE_H_
  22
  23 #include <linux/config.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/dma-mapping.h>
  26 #include <asm/ocp.h>
  27
  28 #include "ibm_emac.h"
  29 #include "ibm_emac_phy.h"
  30 #include "ibm_emac_zmii.h"
  31 #include "ibm_emac_rgmii.h"
  32 #include "ibm_emac_mal.h"
  33 #include "ibm_emac_tah.h"
  34
  35 #define NUM_TX_BUFF                     CONFIG_IBM_EMAC_TXB
  36 #define NUM_RX_BUFF                     CONFIG_IBM_EMAC_RXB
  37
  38 /* Simple sanity check */
  39 #if NUM_TX_BUFF > 256 || NUM_RX_BUFF > 256
  40 #error Invalid number of buffer descriptors (greater than 256)
  41 #endif
  42
  43 // XXX
  44 #define EMAC_MIN_MTU                    46
  45 #define EMAC_MAX_MTU                    9000
  46
  47 /* Maximum L2 header length (VLAN tagged, no FCS) */
  48 #define EMAC_MTU_OVERHEAD               (6 * 2 + 2 + 4)
  49
  50 /* RX BD size for the given MTU */
  51 static inline int emac_rx_size(int mtu)
  52 {
  53         if (mtu > ETH_DATA_LEN)
  54                 return MAL_MAX_RX_SIZE;
  55         else
  56                 return mal_rx_size(ETH_DATA_LEN + EMAC_MTU_OVERHEAD);
  57 }
  58
  59 #define EMAC_DMA_ALIGN(x)               ALIGN((x), dma_get_cache_alignment())
  60
  61 #define EMAC_RX_SKB_HEADROOM            \
  62         EMAC_DMA_ALIGN(CONFIG_IBM_EMAC_RX_SKB_HEADROOM)
  63
  64 /* Size of RX skb for the given MTU */
  65 static inline int emac_rx_skb_size(int mtu)
  66 {
  67         int size = max(mtu + EMAC_MTU_OVERHEAD, emac_rx_size(mtu));
  68         return EMAC_DMA_ALIGN(size + 2) + EMAC_RX_SKB_HEADROOM;
  69 }
  70
  71 /* RX DMA sync size */
  72 static inline int emac_rx_sync_size(int mtu)
  73 {
  74         return EMAC_DMA_ALIGN(emac_rx_size(mtu) + 2);
  75 }
  76
  77 /* Driver statistcs is split into two parts to make it more cache friendly:
  78  *   - normal statistics (packet count, etc)
  79  *   - error statistics
  80  *
  81  * When statistics is requested by ethtool, these parts are concatenated,
  82  * normal one goes first.
  83  *
  84  * Please, keep these structures in sync with emac_stats_keys.
  85  */
  86
  87 /* Normal TX/RX Statistics */
  88 struct ibm_emac_stats {
  89         u64 rx_packets;
  90         u64 rx_bytes;
  91         u64 tx_packets;
  92         u64 tx_bytes;
  93         u64 rx_packets_csum;
  94         u64 tx_packets_csum;
  95 };
  96
  97 /* Error statistics */
  98 struct ibm_emac_error_stats {
  99         u64 tx_undo;
 100
 101         /* Software RX Errors */
 102         u64 rx_dropped_stack;
 103         u64 rx_dropped_oom;
 104         u64 rx_dropped_error;
 105         u64 rx_dropped_resize;
 106         u64 rx_dropped_mtu;
 107         u64 rx_stopped;
 108         /* BD reported RX errors */
 109         u64 rx_bd_errors;
 110         u64 rx_bd_overrun;
 111         u64 rx_bd_bad_packet;
 112         u64 rx_bd_runt_packet;
 113         u64 rx_bd_short_event;
 114         u64 rx_bd_alignment_error;
 115         u64 rx_bd_bad_fcs;
 116         u64 rx_bd_packet_too_long;
 117         u64 rx_bd_out_of_range;
 118         u64 rx_bd_in_range;
 119         /* EMAC IRQ reported RX errors */
 120         u64 rx_parity;
 121         u64 rx_fifo_overrun;
 122         u64 rx_overrun;
 123         u64 rx_bad_packet;
 124         u64 rx_runt_packet;
 125         u64 rx_short_event;
 126         u64 rx_alignment_error;
 127         u64 rx_bad_fcs;
 128         u64 rx_packet_too_long;
 129         u64 rx_out_of_range;
 130         u64 rx_in_range;
 131
 132         /* Software TX Errors */
 133         u64 tx_dropped;
 134         /* BD reported TX errors */
 135         u64 tx_bd_errors;
 136         u64 tx_bd_bad_fcs;
 137         u64 tx_bd_carrier_loss;
 138         u64 tx_bd_excessive_deferral;
 139         u64 tx_bd_excessive_collisions;
 140         u64 tx_bd_late_collision;
 141         u64 tx_bd_multple_collisions;
 142         u64 tx_bd_single_collision;
 143         u64 tx_bd_underrun;
 144         u64 tx_bd_sqe;
 145         /* EMAC IRQ reported TX errors */
 146         u64 tx_parity;
 147         u64 tx_underrun;
 148         u64 tx_sqe;
 149         u64 tx_errors;
 150 };
 151
 152 #define EMAC_ETHTOOL_STATS_COUNT        ((sizeof(struct ibm_emac_stats) + \
 153                                           sizeof(struct ibm_emac_error_stats)) \
 154                                          / sizeof(u64))
 155
 156 struct ocp_enet_private {
 157         struct net_device               *ndev;          /* 0 */
 158         struct emac_regs                *emacp;
 159
 160         struct mal_descriptor           *tx_desc;
 161         int                             tx_cnt;
 162         int                             tx_slot;
 163         int                             ack_slot;
 164
 165         struct mal_descriptor           *rx_desc;
 166         int                             rx_slot;
 167         struct sk_buff                  *rx_sg_skb;     /* 1 */
 168         int                             rx_skb_size;
 169         int                             rx_sync_size;
 170
 171         struct ibm_emac_stats           stats;
 172         struct ocp_device               *tah_dev;
 173
 174         struct ibm_ocp_mal              *mal;
 175         struct mal_commac               commac;
 176
 177         struct sk_buff                  *tx_skb[NUM_TX_BUFF];
 178         struct sk_buff                  *rx_skb[NUM_RX_BUFF];
 179
 180         struct ocp_device               *zmii_dev;
 181         int                             zmii_input;
 182         struct ocp_enet_private         *mdio_dev;
 183         struct ocp_device               *rgmii_dev;
 184         int                             rgmii_input;
 185
 186         struct ocp_def                  *def;
 187
 188         struct mii_phy                  phy;
 189         struct timer_list               link_timer;
 190         int                             reset_failed;
 191
 192         int                             stop_timeout;   /* in us */
 193
 194         struct ibm_emac_error_stats     estats;
 195         struct net_device_stats         nstats;
 196
 197         struct device*                  ldev;
 198 };
 199
 200 /* Ethtool get_regs complex data.
 201  * We want to get not just EMAC registers, but also MAL, ZMII, RGMII, TAH
 202  * when available.
 203  *
 204  * Returned BLOB consists of the ibm_emac_ethtool_regs_hdr,
 205  * MAL registers, EMAC registers and optional ZMII, RGMII, TAH registers.
 206  * Each register component is preceded with emac_ethtool_regs_subhdr.
 207  * Order of the optional headers follows their relative bit posititions
 208  * in emac_ethtool_regs_hdr.components
 209  */
 210 #define EMAC_ETHTOOL_REGS_ZMII          0x00000001
 211 #define EMAC_ETHTOOL_REGS_RGMII         0x00000002
 212 #define EMAC_ETHTOOL_REGS_TAH           0x00000004
 213
 214 struct emac_ethtool_regs_hdr {
 215         u32 components;
 216 };
 217
 218 struct emac_ethtool_regs_subhdr {
 219         u32 version;
 220         u32 index;
 221 };
 222
 223 #endif                          /* __IBM_EMAC_CORE_H_ */