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
16struct cmg_chars {
17	u32 values[NR_MEASUREMENT_CHARS];
18};
19
20#define NR_MEASUREMENT_ENTRIES 8
21struct cmg_entry {
22	u32 values[NR_MEASUREMENT_ENTRIES];
23};
24
25struct 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
44struct channel_path_desc_fmt3 {
45	struct channel_path_desc_fmt1 fmt1_desc;
46	u8 util_str[64];
47};
48
49struct channel_path;
50
51struct 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
65extern struct css_chsc_char css_chsc_characteristics;
66
67struct chsc_ssd_info {
68	u8 path_mask;
69	u8 fla_valid_mask;
70	struct chp_id chpid[8];
71	u16 fla[8];
72};
73
74struct 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
88struct chsc_scssc_area {
89	struct chsc_header request;
90	u16 operation_code;
91	u16:16;
92	u32:32;
93	u32:32;
94	dma64_t summary_indicator_addr;
95	dma64_t 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
108struct 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[];
124} __packed __aligned(PAGE_SIZE);
125
126struct 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
141extern int chsc_get_ssd_info(struct subchannel_id schid,
142			     struct chsc_ssd_info *ssd);
143extern int chsc_determine_css_characteristics(void);
144extern int chsc_init(void);
145extern void chsc_init_cleanup(void);
146
147int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);
148extern int chsc_enable_facility(int);
149struct channel_subsystem;
150extern int chsc_secm(struct channel_subsystem *, int);
151int __chsc_do_secm(struct channel_subsystem *css, int enable);
152
153int chsc_chp_vary(struct chp_id chpid, int on);
154int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
155				     int c, int m, void *page);
156int chsc_determine_fmt0_channel_path_desc(struct chp_id chpid,
157					  struct channel_path_desc_fmt0 *desc);
158int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
159					  struct channel_path_desc_fmt1 *desc);
160int chsc_determine_fmt3_channel_path_desc(struct chp_id chpid,
161					  struct channel_path_desc_fmt3 *desc);
162void chsc_chp_online(struct chp_id chpid);
163void chsc_chp_offline(struct chp_id chpid);
164int chsc_get_channel_measurement_chars(struct channel_path *chp);
165int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
166int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
167	      dma64_t summary_indicator_addr, dma64_t subchannel_indicator_addr,
168	      u8 isc);
169int chsc_sgib(u32 origin);
170int chsc_error_from_response(int response);
171
172int chsc_siosl(struct subchannel_id schid);
173
174/* Functions and definitions to query storage-class memory. */
175struct 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
187struct 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
207int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
208
209int 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
212int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid);
213
214#ifdef CONFIG_SCM_BUS
215int scm_update_information(void);
216int scm_process_availability_information(void);
217#else /* CONFIG_SCM_BUS */
218static inline int scm_update_information(void) { return 0; }
219static inline int scm_process_availability_information(void) { return 0; }
220#endif /* CONFIG_SCM_BUS */
221
222
223#endif
224