linux/drivers/net/ethernet/ibm/ibmveth.h
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   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * IBM Power Virtual Ethernet Device Driver
   4 *
   5 * Copyright (C) IBM Corporation, 2003, 2010
   6 *
   7 * Authors: Dave Larson <larson1@us.ibm.com>
   8 *          Santiago Leon <santil@linux.vnet.ibm.com>
   9 *          Brian King <brking@linux.vnet.ibm.com>
  10 *          Robert Jennings <rcj@linux.vnet.ibm.com>
  11 *          Anton Blanchard <anton@au.ibm.com>
  12 */
  13
  14#ifndef _IBMVETH_H
  15#define _IBMVETH_H
  16
  17/* constants for H_MULTICAST_CTRL */
  18#define IbmVethMcastReceptionModifyBit     0x80000UL
  19#define IbmVethMcastReceptionEnableBit     0x20000UL
  20#define IbmVethMcastFilterModifyBit        0x40000UL
  21#define IbmVethMcastFilterEnableBit        0x10000UL
  22
  23#define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
  24#define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
  25#define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
  26#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
  27#define IbmVethMcastAddFilter        0x1UL
  28#define IbmVethMcastRemoveFilter     0x2UL
  29#define IbmVethMcastClearFilterTable 0x3UL
  30
  31#define IBMVETH_ILLAN_LRG_SR_ENABLED    0x0000000000010000UL
  32#define IBMVETH_ILLAN_LRG_SND_SUPPORT   0x0000000000008000UL
  33#define IBMVETH_ILLAN_PADDED_PKT_CSUM   0x0000000000002000UL
  34#define IBMVETH_ILLAN_TRUNK_PRI_MASK    0x0000000000000F00UL
  35#define IBMVETH_ILLAN_IPV6_TCP_CSUM             0x0000000000000004UL
  36#define IBMVETH_ILLAN_IPV4_TCP_CSUM             0x0000000000000002UL
  37#define IBMVETH_ILLAN_ACTIVE_TRUNK              0x0000000000000001UL
  38
  39/* hcall macros */
  40#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
  41  plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
  42
  43#define h_free_logical_lan(ua) \
  44  plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
  45
  46#define h_add_logical_lan_buffer(ua, buf) \
  47  plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
  48
  49static inline long h_send_logical_lan(unsigned long unit_address,
  50                unsigned long desc1, unsigned long desc2, unsigned long desc3,
  51                unsigned long desc4, unsigned long desc5, unsigned long desc6,
  52                unsigned long corellator_in, unsigned long *corellator_out,
  53                unsigned long mss, unsigned long large_send_support)
  54{
  55        long rc;
  56        unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
  57
  58        if (large_send_support)
  59                rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
  60                                  desc1, desc2, desc3, desc4, desc5, desc6,
  61                                  corellator_in, mss);
  62        else
  63                rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
  64                                  desc1, desc2, desc3, desc4, desc5, desc6,
  65                                  corellator_in);
  66
  67        *corellator_out = retbuf[0];
  68
  69        return rc;
  70}
  71
  72static inline long h_illan_attributes(unsigned long unit_address,
  73                                      unsigned long reset_mask, unsigned long set_mask,
  74                                      unsigned long *ret_attributes)
  75{
  76        long rc;
  77        unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
  78
  79        rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
  80                         reset_mask, set_mask);
  81
  82        *ret_attributes = retbuf[0];
  83
  84        return rc;
  85}
  86
  87#define h_multicast_ctrl(ua, cmd, mac) \
  88  plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
  89
  90#define h_change_logical_lan_mac(ua, mac) \
  91  plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
  92
  93#define IBMVETH_NUM_BUFF_POOLS 5
  94#define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
  95#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
  96#define IBMVETH_MIN_MTU 68
  97#define IBMVETH_MAX_POOL_COUNT 4096
  98#define IBMVETH_BUFF_LIST_SIZE 4096
  99#define IBMVETH_FILT_LIST_SIZE 4096
 100#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
 101
 102static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
 103static int pool_count[] = { 256, 512, 256, 256, 256 };
 104static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
 105static int pool_active[] = { 1, 1, 0, 0, 1};
 106
 107#define IBM_VETH_INVALID_MAP ((u16)0xffff)
 108
 109struct ibmveth_buff_pool {
 110    u32 size;
 111    u32 index;
 112    u32 buff_size;
 113    u32 threshold;
 114    atomic_t available;
 115    u32 consumer_index;
 116    u32 producer_index;
 117    u16 *free_map;
 118    dma_addr_t *dma_addr;
 119    struct sk_buff **skbuff;
 120    int active;
 121    struct kobject kobj;
 122};
 123
 124struct ibmveth_rx_q {
 125    u64        index;
 126    u64        num_slots;
 127    u64        toggle;
 128    dma_addr_t queue_dma;
 129    u32        queue_len;
 130    struct ibmveth_rx_q_entry *queue_addr;
 131};
 132
 133struct ibmveth_adapter {
 134    struct vio_dev *vdev;
 135    struct net_device *netdev;
 136    struct napi_struct napi;
 137    unsigned int mcastFilterSize;
 138    void * buffer_list_addr;
 139    void * filter_list_addr;
 140    dma_addr_t buffer_list_dma;
 141    dma_addr_t filter_list_dma;
 142    struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
 143    struct ibmveth_rx_q rx_queue;
 144    int pool_config;
 145    int rx_csum;
 146    int large_send;
 147    bool is_active_trunk;
 148    void *bounce_buffer;
 149    dma_addr_t bounce_buffer_dma;
 150
 151    u64 fw_ipv6_csum_support;
 152    u64 fw_ipv4_csum_support;
 153    u64 fw_large_send_support;
 154    /* adapter specific stats */
 155    u64 replenish_task_cycles;
 156    u64 replenish_no_mem;
 157    u64 replenish_add_buff_failure;
 158    u64 replenish_add_buff_success;
 159    u64 rx_invalid_buffer;
 160    u64 rx_no_buffer;
 161    u64 tx_map_failed;
 162    u64 tx_send_failed;
 163    u64 tx_large_packets;
 164    u64 rx_large_packets;
 165    /* Ethtool settings */
 166        u8 duplex;
 167        u32 speed;
 168};
 169
 170/*
 171 * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
 172 * so we don't need to byteswap the two elements. However since we use
 173 * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
 174 * do end up with endian specific ordering of the elements and that
 175 * needs correcting.
 176 */
 177struct ibmveth_buf_desc_fields {
 178#ifdef __BIG_ENDIAN
 179        u32 flags_len;
 180        u32 address;
 181#else
 182        u32 address;
 183        u32 flags_len;
 184#endif
 185#define IBMVETH_BUF_VALID       0x80000000
 186#define IBMVETH_BUF_TOGGLE      0x40000000
 187#define IBMVETH_BUF_LRG_SND     0x04000000
 188#define IBMVETH_BUF_NO_CSUM     0x02000000
 189#define IBMVETH_BUF_CSUM_GOOD   0x01000000
 190#define IBMVETH_BUF_LEN_MASK    0x00FFFFFF
 191};
 192
 193union ibmveth_buf_desc {
 194    u64 desc;
 195    struct ibmveth_buf_desc_fields fields;
 196};
 197
 198struct ibmveth_rx_q_entry {
 199        __be32 flags_off;
 200#define IBMVETH_RXQ_TOGGLE              0x80000000
 201#define IBMVETH_RXQ_TOGGLE_SHIFT        31
 202#define IBMVETH_RXQ_VALID               0x40000000
 203#define IBMVETH_RXQ_LRG_PKT             0x04000000
 204#define IBMVETH_RXQ_NO_CSUM             0x02000000
 205#define IBMVETH_RXQ_CSUM_GOOD           0x01000000
 206#define IBMVETH_RXQ_OFF_MASK            0x0000FFFF
 207
 208        __be32 length;
 209        /* correlator is only used by the OS, no need to byte swap */
 210        u64 correlator;
 211};
 212
 213#endif /* _IBMVETH_H */
 214