2 * drivers/net/ibm_emac/ibm_emac_core.h
4 * Driver for PowerPC 4xx on-chip ethernet controller.
6 * Copyright (c) 2004, 2005 Zultys Technologies.
7 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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.
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.
20 #ifndef __IBM_EMAC_CORE_H_
21 #define __IBM_EMAC_CORE_H_
23 #include <linux/netdevice.h>
24 #include <linux/dma-mapping.h>
28 #include "ibm_emac_phy.h"
29 #include "ibm_emac_zmii.h"
30 #include "ibm_emac_rgmii.h"
31 #include "ibm_emac_mal.h"
32 #include "ibm_emac_tah.h"
34 #define NUM_TX_BUFF CONFIG_IBM_EMAC_TXB
35 #define NUM_RX_BUFF CONFIG_IBM_EMAC_RXB
37 /* Simple sanity check */
38 #if NUM_TX_BUFF > 256 || NUM_RX_BUFF > 256
39 #error Invalid number of buffer descriptors (greater than 256)
43 #define EMAC_MIN_MTU 46
44 #define EMAC_MAX_MTU 9000
46 /* Maximum L2 header length (VLAN tagged, no FCS) */
47 #define EMAC_MTU_OVERHEAD (6 * 2 + 2 + 4)
49 /* RX BD size for the given MTU */
50 static inline int emac_rx_size(int mtu)
52 if (mtu > ETH_DATA_LEN)
53 return MAL_MAX_RX_SIZE;
55 return mal_rx_size(ETH_DATA_LEN + EMAC_MTU_OVERHEAD);
58 #define EMAC_DMA_ALIGN(x) ALIGN((x), dma_get_cache_alignment())
60 #define EMAC_RX_SKB_HEADROOM \
61 EMAC_DMA_ALIGN(CONFIG_IBM_EMAC_RX_SKB_HEADROOM)
63 /* Size of RX skb for the given MTU */
64 static inline int emac_rx_skb_size(int mtu)
66 int size = max(mtu + EMAC_MTU_OVERHEAD, emac_rx_size(mtu));
67 return EMAC_DMA_ALIGN(size + 2) + EMAC_RX_SKB_HEADROOM;
70 /* RX DMA sync size */
71 static inline int emac_rx_sync_size(int mtu)
73 return EMAC_DMA_ALIGN(emac_rx_size(mtu) + 2);
76 /* Driver statistcs is split into two parts to make it more cache friendly:
77 * - normal statistics (packet count, etc)
80 * When statistics is requested by ethtool, these parts are concatenated,
81 * normal one goes first.
83 * Please, keep these structures in sync with emac_stats_keys.
86 /* Normal TX/RX Statistics */
87 struct ibm_emac_stats {
96 /* Error statistics */
97 struct ibm_emac_error_stats {
100 /* Software RX Errors */
101 u64 rx_dropped_stack;
103 u64 rx_dropped_error;
104 u64 rx_dropped_resize;
107 /* BD reported RX errors */
110 u64 rx_bd_bad_packet;
111 u64 rx_bd_runt_packet;
112 u64 rx_bd_short_event;
113 u64 rx_bd_alignment_error;
115 u64 rx_bd_packet_too_long;
116 u64 rx_bd_out_of_range;
118 /* EMAC IRQ reported RX errors */
125 u64 rx_alignment_error;
127 u64 rx_packet_too_long;
131 /* Software TX Errors */
133 /* BD reported TX errors */
136 u64 tx_bd_carrier_loss;
137 u64 tx_bd_excessive_deferral;
138 u64 tx_bd_excessive_collisions;
139 u64 tx_bd_late_collision;
140 u64 tx_bd_multple_collisions;
141 u64 tx_bd_single_collision;
144 /* EMAC IRQ reported TX errors */
151 #define EMAC_ETHTOOL_STATS_COUNT ((sizeof(struct ibm_emac_stats) + \
152 sizeof(struct ibm_emac_error_stats)) \
155 struct ocp_enet_private {
156 struct net_device *ndev; /* 0 */
157 struct emac_regs __iomem *emacp;
159 struct mal_descriptor *tx_desc;
164 struct mal_descriptor *rx_desc;
166 struct sk_buff *rx_sg_skb; /* 1 */
170 struct ibm_emac_stats stats;
171 struct ocp_device *tah_dev;
173 struct ibm_ocp_mal *mal;
174 struct mal_commac commac;
176 struct sk_buff *tx_skb[NUM_TX_BUFF];
177 struct sk_buff *rx_skb[NUM_RX_BUFF];
179 struct ocp_device *zmii_dev;
181 struct ocp_enet_private *mdio_dev;
182 struct ocp_device *rgmii_dev;
188 struct timer_list link_timer;
191 int stop_timeout; /* in us */
193 struct ibm_emac_error_stats estats;
194 struct net_device_stats nstats;
199 /* Ethtool get_regs complex data.
200 * We want to get not just EMAC registers, but also MAL, ZMII, RGMII, TAH
203 * Returned BLOB consists of the ibm_emac_ethtool_regs_hdr,
204 * MAL registers, EMAC registers and optional ZMII, RGMII, TAH registers.
205 * Each register component is preceded with emac_ethtool_regs_subhdr.
206 * Order of the optional headers follows their relative bit posititions
207 * in emac_ethtool_regs_hdr.components
209 #define EMAC_ETHTOOL_REGS_ZMII 0x00000001
210 #define EMAC_ETHTOOL_REGS_RGMII 0x00000002
211 #define EMAC_ETHTOOL_REGS_TAH 0x00000004
213 struct emac_ethtool_regs_hdr {
217 struct emac_ethtool_regs_subhdr {
222 #endif /* __IBM_EMAC_CORE_H_ */