chsc.h

  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
 20struct cmg_cmcb {
 21	u32 not_valid : 1;
 22	u32 shared    : 1;
 23	u32 extended  : 1;
 24	u32	      : 21;
 25	u32 chpid     : 8;
 26	u32 cmcv      : 5;
 27	u32	      : 7;
 28	u32 cmgp      : 4;
 29	u32 cmgq      : 8;
 30	u32 cmg       : 8;
 31	u32	      : 16;
 32	u32 cmgs      : 16;
 33	u32 data[NR_MEASUREMENT_CHARS];
 34};
 35
 36#define NR_MEASUREMENT_ENTRIES 8
 37struct cmg_entry {
 38	u32 values[NR_MEASUREMENT_ENTRIES];
 39};
 40
 41#define NR_EXT_MEASUREMENT_ENTRIES 16
 42struct cmg_ext_entry {
 43	u32 values[NR_EXT_MEASUREMENT_ENTRIES];
 44};
 45
 46struct channel_path_desc_fmt1 {
 47	u8 flags;
 48	u8 lsn;
 49	u8 desc;
 50	u8 chpid;
 51	u32:16;
 52	u8 esc;
 53	u8 chpp;
 54	u32 unused[2];
 55	u16 chid;
 56	u32:16;
 57	u16 mdc;
 58	u16:13;
 59	u8 r:1;
 60	u8 s:1;
 61	u8 f:1;
 62	u32 zeros[2];
 63};
 64
 65struct channel_path_desc_fmt3 {
 66	struct channel_path_desc_fmt1 fmt1_desc;
 67	u8 util_str[64];
 68};
 69
 70struct channel_path;
 71
 72struct css_chsc_char {
 73	u64 res;
 74	u64 : 20;
 75	u32 secm : 1; /* bit 84 */
 76	u32 : 1;
 77	u32 scmc : 1; /* bit 86 */
 78	u32 : 20;
 79	u32 scssc : 1;  /* bit 107 */
 80	u32 scsscf : 1; /* bit 108 */
 81	u32:7;
 82	u32 pnso:1; /* bit 116 */
 83	u32:11;
 84} __packed;
 85
 86extern struct css_chsc_char css_chsc_characteristics;
 87
 88struct chsc_ssd_info {
 89	u8 path_mask;
 90	u8 fla_valid_mask;
 91	struct chp_id chpid[8];
 92	u16 fla[8];
 93};
 94
 95struct chsc_ssqd_area {
 96	struct chsc_header request;
 97	u16:10;
 98	u8 ssid:2;
 99	u8 fmt:4;
100	u16 first_sch;
101	u16:16;
102	u16 last_sch;
103	u32:32;
104	struct chsc_header response;
105	u32:32;
106	struct qdio_ssqd_desc qdio_ssqd;
107} __packed __aligned(PAGE_SIZE);
108
109struct chsc_scssc_area {
110	struct chsc_header request;
111	u16 operation_code;
112	u16:16;
113	u32:32;
114	u32:32;
115	dma64_t summary_indicator_addr;
116	dma64_t subchannel_indicator_addr;
117	u32 ks:4;
118	u32 kc:4;
119	u32:21;
120	u32 isc:3;
121	u32 word_with_d_bit;
122	u32:32;
123	struct subchannel_id schid;
124	u32 reserved[1004];
125	struct chsc_header response;
126	u32:32;
127} __packed __aligned(PAGE_SIZE);
128
129struct chsc_scpd {
130	struct chsc_header request;
131	u32:2;
132	u32 m:1;
133	u32 c:1;
134	u32 fmt:4;
135	u32 cssid:8;
136	u32:4;
137	u32 rfmt:4;
138	u32 first_chpid:8;
139	u32:24;
140	u32 last_chpid:8;
141	u32 zeroes1;
142	struct chsc_header response;
143	u32:32;
144	u8 data[];
145} __packed __aligned(PAGE_SIZE);
146
147struct chsc_sda_area {
148	struct chsc_header request;
149	u8 :4;
150	u8 format:4;
151	u8 :8;
152	u16 operation_code;
153	u32 :32;
154	u32 :32;
155	u32 operation_data_area[252];
156	struct chsc_header response;
157	u32 :4;
158	u32 format2:4;
159	u32 :24;
160} __packed __aligned(PAGE_SIZE);
161
162extern int chsc_get_ssd_info(struct subchannel_id schid,
163			     struct chsc_ssd_info *ssd);
164extern int chsc_determine_css_characteristics(void);
165extern int chsc_init(void);
166extern void chsc_init_cleanup(void);
167
168int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);
169extern int chsc_enable_facility(int);
170struct channel_subsystem;
171extern int chsc_secm(struct channel_subsystem *, int);
172int __chsc_do_secm(struct channel_subsystem *css, int enable);
173
174int chsc_chp_vary(struct chp_id chpid, int on);
175int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
176				     int c, int m, void *page);
177int chsc_determine_fmt0_channel_path_desc(struct chp_id chpid,
178					  struct channel_path_desc_fmt0 *desc);
179int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
180					  struct channel_path_desc_fmt1 *desc);
181int chsc_determine_fmt3_channel_path_desc(struct chp_id chpid,
182					  struct channel_path_desc_fmt3 *desc);
183void chsc_chp_online(struct chp_id chpid);
184void chsc_chp_offline(struct chp_id chpid);
185int chsc_get_channel_measurement_chars(struct channel_path *chp);
186int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
187int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
188	      dma64_t summary_indicator_addr, dma64_t subchannel_indicator_addr,
189	      u8 isc);
190int chsc_sgib(u32 origin);
191int chsc_error_from_response(int response);
192
193int chsc_siosl(struct subchannel_id schid);
194
195/* Functions and definitions to query storage-class memory. */
196struct sale {
197	u64 sa;
198	u32 p:4;
199	u32 op_state:4;
200	u32 data_state:4;
201	u32 rank:4;
202	u32 r:1;
203	u32:7;
204	u32 rid:8;
205	u32:32;
206} __packed;
207
208struct chsc_scm_info {
209	struct chsc_header request;
210	u32:32;
211	u64 reqtok;
212	u32 reserved1[4];
213	struct chsc_header response;
214	u64:56;
215	u8 rq;
216	u32 mbc;
217	u64 msa;
218	u16 is;
219	u16 mmc;
220	u32 mci;
221	u64 nr_scm_ini;
222	u64 nr_scm_unini;
223	u32 reserved2[10];
224	u64 restok;
225	struct sale scmal[248];
226} __packed __aligned(PAGE_SIZE);
227
228int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
229
230int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area,
231	      u8 oc, struct chsc_pnso_resume_token resume_token, int cnc);
232
233int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid);
234
235#ifdef CONFIG_SCM_BUS
236int scm_update_information(void);
237int scm_process_availability_information(void);
238#else /* CONFIG_SCM_BUS */
239static inline int scm_update_information(void) { return 0; }
240static inline int scm_process_availability_information(void) { return 0; }
241#endif /* CONFIG_SCM_BUS */
242
243
244#endif