tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * IBM Power Virtual Ethernet Device Driver
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * Copyright (C) IBM Corporation, 2003, 2010
18 *
19 * Authors: Dave Larson <larson1@us.ibm.com>
20 * Santiago Leon <santil@linux.vnet.ibm.com>
21 * Brian King <brking@linux.vnet.ibm.com>
22 * Robert Jennings <rcj@linux.vnet.ibm.com>
23 * Anton Blanchard <anton@au.ibm.com>
24 */
25
26#ifndef _IBMVETH_H
27#define _IBMVETH_H
28
29/* constants for H_MULTICAST_CTRL */
30#define IbmVethMcastReceptionModifyBit 0x80000UL
31#define IbmVethMcastReceptionEnableBit 0x20000UL
32#define IbmVethMcastFilterModifyBit 0x40000UL
33#define IbmVethMcastFilterEnableBit 0x10000UL
34
35#define IbmVethMcastEnableRecv (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
36#define IbmVethMcastDisableRecv (IbmVethMcastReceptionModifyBit)
37#define IbmVethMcastEnableFiltering (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
38#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
39#define IbmVethMcastAddFilter 0x1UL
40#define IbmVethMcastRemoveFilter 0x2UL
41#define IbmVethMcastClearFilterTable 0x3UL
42
43#define IBMVETH_ILLAN_PADDED_PKT_CSUM 0x0000000000002000UL
44#define IBMVETH_ILLAN_TRUNK_PRI_MASK 0x0000000000000F00UL
45#define IBMVETH_ILLAN_IPV6_TCP_CSUM 0x0000000000000004UL
46#define IBMVETH_ILLAN_IPV4_TCP_CSUM 0x0000000000000002UL
47#define IBMVETH_ILLAN_ACTIVE_TRUNK 0x0000000000000001UL
48
49/* hcall macros */
50#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
51 plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
52
53#define h_free_logical_lan(ua) \
54 plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
55
56#define h_add_logical_lan_buffer(ua, buf) \
57 plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
58
59static inline long h_send_logical_lan(unsigned long unit_address,
60 unsigned long desc1, unsigned long desc2, unsigned long desc3,
61 unsigned long desc4, unsigned long desc5, unsigned long desc6,
62 unsigned long corellator_in, unsigned long *corellator_out)
63{
64 long rc;
65 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
66
67 rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
68 desc2, desc3, desc4, desc5, desc6, corellator_in);
69
70 *corellator_out = retbuf[0];
71
72 return rc;
73}
74
75static inline long h_illan_attributes(unsigned long unit_address,
76 unsigned long reset_mask, unsigned long set_mask,
77 unsigned long *ret_attributes)
78{
79 long rc;
80 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
81
82 rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
83 reset_mask, set_mask);
84
85 *ret_attributes = retbuf[0];
86
87 return rc;
88}
89
90#define h_multicast_ctrl(ua, cmd, mac) \
91 plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
92
93#define h_change_logical_lan_mac(ua, mac) \
94 plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
95
96#define IBMVETH_NUM_BUFF_POOLS 5
97#define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
98#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
99#define IBMVETH_MIN_MTU 68
100#define IBMVETH_MAX_POOL_COUNT 4096
101#define IBMVETH_BUFF_LIST_SIZE 4096
102#define IBMVETH_FILT_LIST_SIZE 4096
103#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
104
105static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
106static int pool_count[] = { 256, 512, 256, 256, 256 };
107static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
108static int pool_active[] = { 1, 1, 0, 0, 1};
109
110#define IBM_VETH_INVALID_MAP ((u16)0xffff)
111
112struct ibmveth_buff_pool {
113 u32 size;
114 u32 index;
115 u32 buff_size;
116 u32 threshold;
117 atomic_t available;
118 u32 consumer_index;
119 u32 producer_index;
120 u16 *free_map;
121 dma_addr_t *dma_addr;
122 struct sk_buff **skbuff;
123 int active;
124 struct kobject kobj;
125};
126
127struct ibmveth_rx_q {
128 u64 index;
129 u64 num_slots;
130 u64 toggle;
131 dma_addr_t queue_dma;
132 u32 queue_len;
133 struct ibmveth_rx_q_entry *queue_addr;
134};
135
136struct ibmveth_adapter {
137 struct vio_dev *vdev;
138 struct net_device *netdev;
139 struct napi_struct napi;
140 struct net_device_stats stats;
141 unsigned int mcastFilterSize;
142 void * buffer_list_addr;
143 void * filter_list_addr;
144 dma_addr_t buffer_list_dma;
145 dma_addr_t filter_list_dma;
146 struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
147 struct ibmveth_rx_q rx_queue;
148 int pool_config;
149 int rx_csum;
150 void *bounce_buffer;
151 dma_addr_t bounce_buffer_dma;
152
153 u64 fw_ipv6_csum_support;
154 u64 fw_ipv4_csum_support;
155 /* adapter specific stats */
156 u64 replenish_task_cycles;
157 u64 replenish_no_mem;
158 u64 replenish_add_buff_failure;
159 u64 replenish_add_buff_success;
160 u64 rx_invalid_buffer;
161 u64 rx_no_buffer;
162 u64 tx_map_failed;
163 u64 tx_send_failed;
164 u64 tx_large_packets;
165 u64 rx_large_packets;
166};
167
168/*
169 * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
170 * so we don't need to byteswap the two elements. However since we use
171 * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
172 * do end up with endian specific ordering of the elements and that
173 * needs correcting.
174 */
175struct ibmveth_buf_desc_fields {
176#ifdef __BIG_ENDIAN
177 u32 flags_len;
178 u32 address;
179#else
180 u32 address;
181 u32 flags_len;
182#endif
183#define IBMVETH_BUF_VALID 0x80000000
184#define IBMVETH_BUF_TOGGLE 0x40000000
185#define IBMVETH_BUF_NO_CSUM 0x02000000
186#define IBMVETH_BUF_CSUM_GOOD 0x01000000
187#define IBMVETH_BUF_LEN_MASK 0x00FFFFFF
188};
189
190union ibmveth_buf_desc {
191 u64 desc;
192 struct ibmveth_buf_desc_fields fields;
193};
194
195struct 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_NO_CSUM 0x02000000
201#define IBMVETH_RXQ_CSUM_GOOD 0x01000000
202#define IBMVETH_RXQ_OFF_MASK 0x0000FFFF
203
204 __be32 length;
205 /* correlator is only used by the OS, no need to byte swap */
206 u64 correlator;
207};
208
209#endif /* _IBMVETH_H */