1 /*
2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
4  *
5  * This program is free software; you may redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; version 2 of the License.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16  * SOFTWARE.
17  *
18  */
19 
20 #ifndef _ENIC_RES_H_
21 #define _ENIC_RES_H_
22 
23 #include "wq_enet_desc.h"
24 #include "rq_enet_desc.h"
25 #include "vnic_wq.h"
26 #include "vnic_rq.h"
27 
28 #define ENIC_MIN_WQ_DESCS		64
29 #define ENIC_MAX_WQ_DESCS		4096
30 #define ENIC_MIN_RQ_DESCS		64
31 #define ENIC_MAX_RQ_DESCS		4096
32 
33 #define ENIC_MIN_MTU			68
34 #define ENIC_MAX_MTU			9000
35 
36 #define ENIC_MULTICAST_PERFECT_FILTERS	32
37 #define ENIC_UNICAST_PERFECT_FILTERS	32
38 
39 #define ENIC_NON_TSO_MAX_DESC		16
40 
41 #define ENIC_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
42 
43 static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
44 	void *os_buf, dma_addr_t dma_addr, unsigned int len,
45 	unsigned int mss_or_csum_offset, unsigned int hdr_len,
46 	int vlan_tag_insert, unsigned int vlan_tag,
47 	int offload_mode, int cq_entry, int sop, int eop, int loopback)
48 {
49 	struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
50 	u8 desc_skip_cnt = 1;
51 	u8 compressed_send = 0;
52 	u64 wrid = 0;
53 
54 	wq_enet_desc_enc(desc,
55 		(u64)dma_addr | VNIC_PADDR_TARGET,
56 		(u16)len,
57 		(u16)mss_or_csum_offset,
58 		(u16)hdr_len, (u8)offload_mode,
59 		(u8)eop, (u8)cq_entry,
60 		0, /* fcoe_encap */
61 		(u8)vlan_tag_insert,
62 		(u16)vlan_tag,
63 		(u8)loopback);
64 
65 	vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop, desc_skip_cnt,
66 			(u8)cq_entry, compressed_send, wrid);
67 }
68 
69 static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
70 	void *os_buf, dma_addr_t dma_addr, unsigned int len,
71 	int eop, int loopback)
72 {
73 	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
74 		0, 0, 0, 0, 0,
75 		eop, 0 /* !SOP */, eop, loopback);
76 }
77 
78 static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
79 	dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
80 	unsigned int vlan_tag, int eop, int loopback)
81 {
82 	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
83 		0, 0, vlan_tag_insert, vlan_tag,
84 		WQ_ENET_OFFLOAD_MODE_CSUM,
85 		eop, 1 /* SOP */, eop, loopback);
86 }
87 
88 static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
89 	void *os_buf, dma_addr_t dma_addr, unsigned int len,
90 	int ip_csum, int tcpudp_csum, int vlan_tag_insert,
91 	unsigned int vlan_tag, int eop, int loopback)
92 {
93 	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
94 		(ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
95 		0, vlan_tag_insert, vlan_tag,
96 		WQ_ENET_OFFLOAD_MODE_CSUM,
97 		eop, 1 /* SOP */, eop, loopback);
98 }
99 
100 static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
101 	void *os_buf, dma_addr_t dma_addr, unsigned int len,
102 	unsigned int csum_offset, unsigned int hdr_len,
103 	int vlan_tag_insert, unsigned int vlan_tag, int eop, int loopback)
104 {
105 	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
106 		csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
107 		WQ_ENET_OFFLOAD_MODE_CSUM_L4,
108 		eop, 1 /* SOP */, eop, loopback);
109 }
110 
111 static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
112 	void *os_buf, dma_addr_t dma_addr, unsigned int len,
113 	unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
114 	unsigned int vlan_tag, int eop, int loopback)
115 {
116 	enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
117 		mss, hdr_len, vlan_tag_insert, vlan_tag,
118 		WQ_ENET_OFFLOAD_MODE_TSO,
119 		eop, 1 /* SOP */, eop, loopback);
120 }
121 
122 static inline void enic_queue_rq_desc(struct vnic_rq *rq,
123 	void *os_buf, unsigned int os_buf_index,
124 	dma_addr_t dma_addr, unsigned int len)
125 {
126 	struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
127 	u64 wrid = 0;
128 	u8 type = os_buf_index ?
129 		RQ_ENET_TYPE_NOT_SOP : RQ_ENET_TYPE_ONLY_SOP;
130 
131 	rq_enet_desc_enc(desc,
132 		(u64)dma_addr | VNIC_PADDR_TARGET,
133 		type, (u16)len);
134 
135 	vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len, wrid);
136 }
137 
138 struct enic;
139 
140 int enic_get_vnic_config(struct enic *);
141 int enic_add_vlan(struct enic *enic, u16 vlanid);
142 int enic_del_vlan(struct enic *enic, u16 vlanid);
143 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
144 	u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
145 	u8 ig_vlan_strip_en);
146 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len);
147 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len);
148 void enic_get_res_counts(struct enic *enic);
149 void enic_init_vnic_resources(struct enic *enic);
150 int enic_alloc_vnic_resources(struct enic *);
151 void enic_free_vnic_resources(struct enic *);
152 
153 #endif /* _ENIC_RES_H_ */
154