drivers/net/ethernet/ibm/ibmveth.h

   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
  49 static 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
  72 static 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
 102 static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
 103 static int pool_count[] = { 256, 512, 256, 256, 256 };
 104 static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
 105 static int pool_active[] = { 1, 1, 0, 0, 1};
 106
 107 #define IBM_VETH_INVALID_MAP ((u16)0xffff)
 108
 109 struct 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
 124 struct 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
 133 struct 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 };
 166
 167 /*
 168  * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
 169  * so we don't need to byteswap the two elements. However since we use
 170  * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
 171  * do end up with endian specific ordering of the elements and that
 172  * needs correcting.
 173  */
 174 struct ibmveth_buf_desc_fields {
 175 #ifdef __BIG_ENDIAN
 176         u32 flags_len;
 177         u32 address;
 178 #else
 179         u32 address;
 180         u32 flags_len;
 181 #endif
 182 #define IBMVETH_BUF_VALID       0x80000000
 183 #define IBMVETH_BUF_TOGGLE      0x40000000
 184 #define IBMVETH_BUF_LRG_SND     0x04000000
 185 #define IBMVETH_BUF_NO_CSUM     0x02000000
 186 #define IBMVETH_BUF_CSUM_GOOD   0x01000000
 187 #define IBMVETH_BUF_LEN_MASK    0x00FFFFFF
 188 };
 189
 190 union ibmveth_buf_desc {
 191     u64 desc;
 192     struct ibmveth_buf_desc_fields fields;
 193 };
 194
 195 struct ibmveth_rx_q_entry {
 196         __be32 flags_off;
 197 #define IBMVETH_RXQ_TOGGLE              0x80000000
 198 #define IBMVETH_RXQ_TOGGLE_SHIFT        31
 199 #define IBMVETH_RXQ_VALID               0x40000000
 200 #define IBMVETH_RXQ_LRG_PKT             0x04000000
 201 #define IBMVETH_RXQ_NO_CSUM             0x02000000
 202 #define IBMVETH_RXQ_CSUM_GOOD           0x01000000
 203 #define IBMVETH_RXQ_OFF_MASK            0x0000FFFF
 204
 205         __be32 length;
 206         /* correlator is only used by the OS, no need to byte swap */
 207         u64 correlator;
 208 };
 209
 210 #endif /* _IBMVETH_H */