1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef S390_ISM_H
3 #define S390_ISM_H
4
5 #include <linux/spinlock.h>
6 #include <linux/types.h>
7 #include <linux/pci.h>
8 #include <net/smc.h>
9 #include <asm/pci_insn.h>
10
11 #define UTIL_STR_LEN 16
12
13 /*
14 * Do not use the first word of the DMB bits to ensure 8 byte aligned access.
15 */
16 #define ISM_DMB_WORD_OFFSET 1
17 #define ISM_DMB_BIT_OFFSET (ISM_DMB_WORD_OFFSET * 32)
18 #define ISM_NR_DMBS 1920
19 #define ISM_IDENT_MASK 0x00FFFF
20
21 #define ISM_REG_SBA 0x1
22 #define ISM_REG_IEQ 0x2
23 #define ISM_READ_GID 0x3
24 #define ISM_ADD_VLAN_ID 0x4
25 #define ISM_DEL_VLAN_ID 0x5
26 #define ISM_SET_VLAN 0x6
27 #define ISM_RESET_VLAN 0x7
28 #define ISM_QUERY_INFO 0x8
29 #define ISM_QUERY_RGID 0x9
30 #define ISM_REG_DMB 0xA
31 #define ISM_UNREG_DMB 0xB
32 #define ISM_SIGNAL_IEQ 0xE
33 #define ISM_UNREG_SBA 0x11
34 #define ISM_UNREG_IEQ 0x12
35
36 struct ism_req_hdr {
37 u32 cmd;
38 u16 : 16;
39 u16 len;
40 };
41
42 struct ism_resp_hdr {
43 u32 cmd;
44 u16 ret;
45 u16 len;
46 };
47
48 union ism_reg_sba {
49 struct {
50 struct ism_req_hdr hdr;
51 u64 sba;
52 } request;
53 struct {
54 struct ism_resp_hdr hdr;
55 } response;
56 } __aligned(16);
57
58 union ism_reg_ieq {
59 struct {
60 struct ism_req_hdr hdr;
61 u64 ieq;
62 u64 len;
63 } request;
64 struct {
65 struct ism_resp_hdr hdr;
66 } response;
67 } __aligned(16);
68
69 union ism_read_gid {
70 struct {
71 struct ism_req_hdr hdr;
72 } request;
73 struct {
74 struct ism_resp_hdr hdr;
75 u64 gid;
76 } response;
77 } __aligned(16);
78
79 union ism_qi {
80 struct {
81 struct ism_req_hdr hdr;
82 } request;
83 struct {
84 struct ism_resp_hdr hdr;
85 u32 version;
86 u32 max_len;
87 u64 ism_state;
88 u64 my_gid;
89 u64 sba;
90 u64 ieq;
91 u32 ieq_len;
92 u32 : 32;
93 u32 dmbs_owned;
94 u32 dmbs_used;
95 u32 vlan_required;
96 u32 vlan_nr_ids;
97 u16 vlan_id[64];
98 } response;
99 } __aligned(64);
100
101 union ism_query_rgid {
102 struct {
103 struct ism_req_hdr hdr;
104 u64 rgid;
105 u32 vlan_valid;
106 u32 vlan_id;
107 } request;
108 struct {
109 struct ism_resp_hdr hdr;
110 } response;
111 } __aligned(16);
112
113 union ism_reg_dmb {
114 struct {
115 struct ism_req_hdr hdr;
116 u64 dmb;
117 u32 dmb_len;
118 u32 sba_idx;
119 u32 vlan_valid;
120 u32 vlan_id;
121 u64 rgid;
122 } request;
123 struct {
124 struct ism_resp_hdr hdr;
125 u64 dmb_tok;
126 } response;
127 } __aligned(32);
128
129 union ism_sig_ieq {
130 struct {
131 struct ism_req_hdr hdr;
132 u64 rgid;
133 u32 trigger_irq;
134 u32 event_code;
135 u64 info;
136 } request;
137 struct {
138 struct ism_resp_hdr hdr;
139 } response;
140 } __aligned(32);
141
142 union ism_unreg_dmb {
143 struct {
144 struct ism_req_hdr hdr;
145 u64 dmb_tok;
146 } request;
147 struct {
148 struct ism_resp_hdr hdr;
149 } response;
150 } __aligned(16);
151
152 union ism_cmd_simple {
153 struct {
154 struct ism_req_hdr hdr;
155 } request;
156 struct {
157 struct ism_resp_hdr hdr;
158 } response;
159 } __aligned(8);
160
161 union ism_set_vlan_id {
162 struct {
163 struct ism_req_hdr hdr;
164 u64 vlan_id;
165 } request;
166 struct {
167 struct ism_resp_hdr hdr;
168 } response;
169 } __aligned(16);
170
171 struct ism_eq_header {
172 u64 idx;
173 u64 ieq_len;
174 u64 entry_len;
175 u64 : 64;
176 };
177
178 struct ism_eq {
179 struct ism_eq_header header;
180 struct smcd_event entry[15];
181 };
182
183 struct ism_sba {
184 u32 s : 1; /* summary bit */
185 u32 e : 1; /* event bit */
186 u32 : 30;
187 u32 dmb_bits[ISM_NR_DMBS / 32];
188 u32 reserved[3];
189 u16 dmbe_mask[ISM_NR_DMBS];
190 };
191
192 struct ism_dev {
193 spinlock_t lock;
194 struct pci_dev *pdev;
195 struct smcd_dev *smcd;
196
197 struct ism_sba *sba;
198 dma_addr_t sba_dma_addr;
199 DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
200
201 struct ism_eq *ieq;
202 dma_addr_t ieq_dma_addr;
203
204 int ieq_idx;
205 };
206
207 #define ISM_CREATE_REQ(dmb, idx, sf, offset) \
208 ((dmb) | (idx) << 24 | (sf) << 23 | (offset))
209
210 struct ism_systemeid {
211 u8 seid_string[24];
212 u8 serial_number[4];
213 u8 type[4];
214 };
215
__ism_read_cmd(struct ism_dev * ism,void * data,unsigned long offset,unsigned long len)216 static inline void __ism_read_cmd(struct ism_dev *ism, void *data,
217 unsigned long offset, unsigned long len)
218 {
219 struct zpci_dev *zdev = to_zpci(ism->pdev);
220 u64 req = ZPCI_CREATE_REQ(zdev->fh, 2, 8);
221
222 while (len > 0) {
223 __zpci_load(data, req, offset);
224 offset += 8;
225 data += 8;
226 len -= 8;
227 }
228 }
229
__ism_write_cmd(struct ism_dev * ism,void * data,unsigned long offset,unsigned long len)230 static inline void __ism_write_cmd(struct ism_dev *ism, void *data,
231 unsigned long offset, unsigned long len)
232 {
233 struct zpci_dev *zdev = to_zpci(ism->pdev);
234 u64 req = ZPCI_CREATE_REQ(zdev->fh, 2, len);
235
236 if (len)
237 __zpci_store_block(data, req, offset);
238 }
239
__ism_move(struct ism_dev * ism,u64 dmb_req,void * data,unsigned int size)240 static inline int __ism_move(struct ism_dev *ism, u64 dmb_req, void *data,
241 unsigned int size)
242 {
243 struct zpci_dev *zdev = to_zpci(ism->pdev);
244 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, size);
245
246 return __zpci_store_block(data, req, dmb_req);
247 }
248
249 #endif /* S390_ISM_H */
250