1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef S390_CHSC_H
3 #define S390_CHSC_H
4 
5 #include <linux/types.h>
6 #include <linux/device.h>
7 #include <asm/css_chars.h>
8 #include <asm/chpid.h>
9 #include <asm/chsc.h>
10 #include <asm/schid.h>
11 #include <asm/qdio.h>
12 
13 #define CHSC_SDA_OC_MSS   0x2
14 
15 #define NR_MEASUREMENT_CHARS 5
16 struct cmg_chars {
17 	u32 values[NR_MEASUREMENT_CHARS];
18 };
19 
20 #define NR_MEASUREMENT_ENTRIES 8
21 struct cmg_entry {
22 	u32 values[NR_MEASUREMENT_ENTRIES];
23 };
24 
25 struct channel_path_desc_fmt1 {
26 	u8 flags;
27 	u8 lsn;
28 	u8 desc;
29 	u8 chpid;
30 	u32:16;
31 	u8 esc;
32 	u8 chpp;
33 	u32 unused[2];
34 	u16 chid;
35 	u32:16;
36 	u16 mdc;
37 	u16:13;
38 	u8 r:1;
39 	u8 s:1;
40 	u8 f:1;
41 	u32 zeros[2];
42 };
43 
44 struct channel_path_desc_fmt3 {
45 	struct channel_path_desc_fmt1 fmt1_desc;
46 	u8 util_str[64];
47 };
48 
49 struct channel_path;
50 
51 struct css_chsc_char {
52 	u64 res;
53 	u64 : 20;
54 	u32 secm : 1; /* bit 84 */
55 	u32 : 1;
56 	u32 scmc : 1; /* bit 86 */
57 	u32 : 20;
58 	u32 scssc : 1;  /* bit 107 */
59 	u32 scsscf : 1; /* bit 108 */
60 	u32:7;
61 	u32 pnso:1; /* bit 116 */
62 	u32:11;
63 } __packed;
64 
65 extern struct css_chsc_char css_chsc_characteristics;
66 
67 struct chsc_ssd_info {
68 	u8 path_mask;
69 	u8 fla_valid_mask;
70 	struct chp_id chpid[8];
71 	u16 fla[8];
72 };
73 
74 struct chsc_ssqd_area {
75 	struct chsc_header request;
76 	u16:10;
77 	u8 ssid:2;
78 	u8 fmt:4;
79 	u16 first_sch;
80 	u16:16;
81 	u16 last_sch;
82 	u32:32;
83 	struct chsc_header response;
84 	u32:32;
85 	struct qdio_ssqd_desc qdio_ssqd;
86 } __packed __aligned(PAGE_SIZE);
87 
88 struct chsc_scssc_area {
89 	struct chsc_header request;
90 	u16 operation_code;
91 	u16:16;
92 	u32:32;
93 	u32:32;
94 	u64 summary_indicator_addr;
95 	u64 subchannel_indicator_addr;
96 	u32 ks:4;
97 	u32 kc:4;
98 	u32:21;
99 	u32 isc:3;
100 	u32 word_with_d_bit;
101 	u32:32;
102 	struct subchannel_id schid;
103 	u32 reserved[1004];
104 	struct chsc_header response;
105 	u32:32;
106 } __packed __aligned(PAGE_SIZE);
107 
108 struct chsc_scpd {
109 	struct chsc_header request;
110 	u32:2;
111 	u32 m:1;
112 	u32 c:1;
113 	u32 fmt:4;
114 	u32 cssid:8;
115 	u32:4;
116 	u32 rfmt:4;
117 	u32 first_chpid:8;
118 	u32:24;
119 	u32 last_chpid:8;
120 	u32 zeroes1;
121 	struct chsc_header response;
122 	u32:32;
123 	u8 data[0];
124 } __packed __aligned(PAGE_SIZE);
125 
126 struct chsc_sda_area {
127 	struct chsc_header request;
128 	u8 :4;
129 	u8 format:4;
130 	u8 :8;
131 	u16 operation_code;
132 	u32 :32;
133 	u32 :32;
134 	u32 operation_data_area[252];
135 	struct chsc_header response;
136 	u32 :4;
137 	u32 format2:4;
138 	u32 :24;
139 } __packed __aligned(PAGE_SIZE);
140 
141 extern int chsc_get_ssd_info(struct subchannel_id schid,
142 			     struct chsc_ssd_info *ssd);
143 extern int chsc_determine_css_characteristics(void);
144 extern int chsc_init(void);
145 extern void chsc_init_cleanup(void);
146 
147 int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);
148 extern int chsc_enable_facility(int);
149 struct channel_subsystem;
150 extern int chsc_secm(struct channel_subsystem *, int);
151 int __chsc_do_secm(struct channel_subsystem *css, int enable);
152 
153 int chsc_chp_vary(struct chp_id chpid, int on);
154 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
155 				     int c, int m, void *page);
156 int chsc_determine_fmt0_channel_path_desc(struct chp_id chpid,
157 					  struct channel_path_desc_fmt0 *desc);
158 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
159 					  struct channel_path_desc_fmt1 *desc);
160 int chsc_determine_fmt3_channel_path_desc(struct chp_id chpid,
161 					  struct channel_path_desc_fmt3 *desc);
162 void chsc_chp_online(struct chp_id chpid);
163 void chsc_chp_offline(struct chp_id chpid);
164 int chsc_get_channel_measurement_chars(struct channel_path *chp);
165 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
166 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
167 	      u64 summary_indicator_addr, u64 subchannel_indicator_addr,
168 	      u8 isc);
169 int chsc_sgib(u32 origin);
170 int chsc_error_from_response(int response);
171 
172 int chsc_siosl(struct subchannel_id schid);
173 
174 /* Functions and definitions to query storage-class memory. */
175 struct sale {
176 	u64 sa;
177 	u32 p:4;
178 	u32 op_state:4;
179 	u32 data_state:4;
180 	u32 rank:4;
181 	u32 r:1;
182 	u32:7;
183 	u32 rid:8;
184 	u32:32;
185 } __packed;
186 
187 struct chsc_scm_info {
188 	struct chsc_header request;
189 	u32:32;
190 	u64 reqtok;
191 	u32 reserved1[4];
192 	struct chsc_header response;
193 	u64:56;
194 	u8 rq;
195 	u32 mbc;
196 	u64 msa;
197 	u16 is;
198 	u16 mmc;
199 	u32 mci;
200 	u64 nr_scm_ini;
201 	u64 nr_scm_unini;
202 	u32 reserved2[10];
203 	u64 restok;
204 	struct sale scmal[248];
205 } __packed __aligned(PAGE_SIZE);
206 
207 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
208 
209 int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area,
210 	      u8 oc, struct chsc_pnso_resume_token resume_token, int cnc);
211 
212 int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid);
213 
214 #ifdef CONFIG_SCM_BUS
215 int scm_update_information(void);
216 int scm_process_availability_information(void);
217 #else /* CONFIG_SCM_BUS */
scm_update_information(void)218 static inline int scm_update_information(void) { return 0; }
scm_process_availability_information(void)219 static inline int scm_process_availability_information(void) { return 0; }
220 #endif /* CONFIG_SCM_BUS */
221 
222 
223 #endif
224