ethernet/ibm/ibmveth.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * IBM Power Virtual Ethernet Device Driver
0004  *
0005  * Copyright (C) IBM Corporation, 2003, 2010
0006  *
0007  * Authors: Dave Larson <larson1@us.ibm.com>
0008  *      Santiago Leon <santil@linux.vnet.ibm.com>
0009  *      Brian King <brking@linux.vnet.ibm.com>
0010  *      Robert Jennings <rcj@linux.vnet.ibm.com>
0011  *      Anton Blanchard <anton@au.ibm.com>
0012  */
0013
0014 #ifndef _IBMVETH_H
0015 #define _IBMVETH_H
0016
0017 /* constants for H_MULTICAST_CTRL */
0018 #define IbmVethMcastReceptionModifyBit     0x80000UL
0019 #define IbmVethMcastReceptionEnableBit     0x20000UL
0020 #define IbmVethMcastFilterModifyBit        0x40000UL
0021 #define IbmVethMcastFilterEnableBit        0x10000UL
0022
0023 #define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
0024 #define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
0025 #define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
0026 #define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
0027 #define IbmVethMcastAddFilter        0x1UL
0028 #define IbmVethMcastRemoveFilter     0x2UL
0029 #define IbmVethMcastClearFilterTable 0x3UL
0030
0031 #define IBMVETH_ILLAN_LRG_SR_ENABLED    0x0000000000010000UL
0032 #define IBMVETH_ILLAN_LRG_SND_SUPPORT   0x0000000000008000UL
0033 #define IBMVETH_ILLAN_PADDED_PKT_CSUM   0x0000000000002000UL
0034 #define IBMVETH_ILLAN_TRUNK_PRI_MASK    0x0000000000000F00UL
0035 #define IBMVETH_ILLAN_IPV6_TCP_CSUM     0x0000000000000004UL
0036 #define IBMVETH_ILLAN_IPV4_TCP_CSUM     0x0000000000000002UL
0037 #define IBMVETH_ILLAN_ACTIVE_TRUNK      0x0000000000000001UL
0038
0039 /* hcall macros */
0040 #define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
0041   plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
0042
0043 #define h_free_logical_lan(ua) \
0044   plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
0045
0046 #define h_add_logical_lan_buffer(ua, buf) \
0047   plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
0048
0049 static inline long h_send_logical_lan(unsigned long unit_address,
0050         unsigned long desc1, unsigned long desc2, unsigned long desc3,
0051         unsigned long desc4, unsigned long desc5, unsigned long desc6,
0052         unsigned long corellator_in, unsigned long *corellator_out,
0053         unsigned long mss, unsigned long large_send_support)
0054 {
0055     long rc;
0056     unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
0057
0058     if (large_send_support)
0059         rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
0060                   desc1, desc2, desc3, desc4, desc5, desc6,
0061                   corellator_in, mss);
0062     else
0063         rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
0064                   desc1, desc2, desc3, desc4, desc5, desc6,
0065                   corellator_in);
0066
0067     *corellator_out = retbuf[0];
0068
0069     return rc;
0070 }
0071
0072 static inline long h_illan_attributes(unsigned long unit_address,
0073                       unsigned long reset_mask, unsigned long set_mask,
0074                       unsigned long *ret_attributes)
0075 {
0076     long rc;
0077     unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
0078
0079     rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
0080              reset_mask, set_mask);
0081
0082     *ret_attributes = retbuf[0];
0083
0084     return rc;
0085 }
0086
0087 #define h_multicast_ctrl(ua, cmd, mac) \
0088   plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
0089
0090 #define h_change_logical_lan_mac(ua, mac) \
0091   plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
0092
0093 #define IBMVETH_NUM_BUFF_POOLS 5
0094 #define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
0095 #define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
0096 #define IBMVETH_MIN_MTU 68
0097 #define IBMVETH_MAX_POOL_COUNT 4096
0098 #define IBMVETH_BUFF_LIST_SIZE 4096
0099 #define IBMVETH_FILT_LIST_SIZE 4096
0100 #define IBMVETH_MAX_BUF_SIZE (1024 * 128)
0101
0102 static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
0103 static int pool_count[] = { 256, 512, 256, 256, 256 };
0104 static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
0105 static int pool_active[] = { 1, 1, 0, 0, 1};
0106
0107 #define IBM_VETH_INVALID_MAP ((u16)0xffff)
0108
0109 struct ibmveth_buff_pool {
0110     u32 size;
0111     u32 index;
0112     u32 buff_size;
0113     u32 threshold;
0114     atomic_t available;
0115     u32 consumer_index;
0116     u32 producer_index;
0117     u16 *free_map;
0118     dma_addr_t *dma_addr;
0119     struct sk_buff **skbuff;
0120     int active;
0121     struct kobject kobj;
0122 };
0123
0124 struct ibmveth_rx_q {
0125     u64        index;
0126     u64        num_slots;
0127     u64        toggle;
0128     dma_addr_t queue_dma;
0129     u32        queue_len;
0130     struct ibmveth_rx_q_entry *queue_addr;
0131 };
0132
0133 struct ibmveth_adapter {
0134     struct vio_dev *vdev;
0135     struct net_device *netdev;
0136     struct napi_struct napi;
0137     unsigned int mcastFilterSize;
0138     void * buffer_list_addr;
0139     void * filter_list_addr;
0140     dma_addr_t buffer_list_dma;
0141     dma_addr_t filter_list_dma;
0142     struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
0143     struct ibmveth_rx_q rx_queue;
0144     int pool_config;
0145     int rx_csum;
0146     int large_send;
0147     bool is_active_trunk;
0148     void *bounce_buffer;
0149     dma_addr_t bounce_buffer_dma;
0150
0151     u64 fw_ipv6_csum_support;
0152     u64 fw_ipv4_csum_support;
0153     u64 fw_large_send_support;
0154     /* adapter specific stats */
0155     u64 replenish_task_cycles;
0156     u64 replenish_no_mem;
0157     u64 replenish_add_buff_failure;
0158     u64 replenish_add_buff_success;
0159     u64 rx_invalid_buffer;
0160     u64 rx_no_buffer;
0161     u64 tx_map_failed;
0162     u64 tx_send_failed;
0163     u64 tx_large_packets;
0164     u64 rx_large_packets;
0165     /* Ethtool settings */
0166     u8 duplex;
0167     u32 speed;
0168 };
0169
0170 /*
0171  * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
0172  * so we don't need to byteswap the two elements. However since we use
0173  * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
0174  * do end up with endian specific ordering of the elements and that
0175  * needs correcting.
0176  */
0177 struct ibmveth_buf_desc_fields {
0178 #ifdef __BIG_ENDIAN
0179     u32 flags_len;
0180     u32 address;
0181 #else
0182     u32 address;
0183     u32 flags_len;
0184 #endif
0185 #define IBMVETH_BUF_VALID   0x80000000
0186 #define IBMVETH_BUF_TOGGLE  0x40000000
0187 #define IBMVETH_BUF_LRG_SND     0x04000000
0188 #define IBMVETH_BUF_NO_CSUM 0x02000000
0189 #define IBMVETH_BUF_CSUM_GOOD   0x01000000
0190 #define IBMVETH_BUF_LEN_MASK    0x00FFFFFF
0191 };
0192
0193 union ibmveth_buf_desc {
0194     u64 desc;
0195     struct ibmveth_buf_desc_fields fields;
0196 };
0197
0198 struct ibmveth_rx_q_entry {
0199     __be32 flags_off;
0200 #define IBMVETH_RXQ_TOGGLE      0x80000000
0201 #define IBMVETH_RXQ_TOGGLE_SHIFT    31
0202 #define IBMVETH_RXQ_VALID       0x40000000
0203 #define IBMVETH_RXQ_LRG_PKT     0x04000000
0204 #define IBMVETH_RXQ_NO_CSUM     0x02000000
0205 #define IBMVETH_RXQ_CSUM_GOOD       0x01000000
0206 #define IBMVETH_RXQ_OFF_MASK        0x0000FFFF
0207
0208     __be32 length;
0209     /* correlator is only used by the OS, no need to byte swap */
0210     u64 correlator;
0211 };
0212
0213 #endif /* _IBMVETH_H */