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 
h_send_logical_lan(unsigned long unit_address,unsigned long desc1,unsigned long desc2,unsigned long desc3,unsigned long desc4,unsigned long desc5,unsigned long desc6,unsigned long corellator_in,unsigned long * corellator_out,unsigned long mss,unsigned long large_send_support)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 
h_illan_attributes(unsigned long unit_address,unsigned long reset_mask,unsigned long set_mask,unsigned long * ret_attributes)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     /* 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  */
177 struct 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 
193 union ibmveth_buf_desc {
194     u64 desc;
195     struct ibmveth_buf_desc_fields fields;
196 };
197 
198 struct 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