[qemu.git] / pc-bios / s390-ccw / cio.h

/*
 * Channel IO definitions
 *
 * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
 *
 * Inspired by various s390 headers in Linux 3.9.
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
 * your option) any later version. See the COPYING file in the top-level
 * directory.
 */

#ifndef CIO_H
#define CIO_H

/*
 * path management control word
 */
struct pmcw {
    __u32 intparm;        /* interruption parameter */
    __u32 qf      : 1;    /* qdio facility */
    __u32 w       : 1;
    __u32 isc     : 3;    /* interruption sublass */
    __u32 res5    : 3;    /* reserved zeros */
    __u32 ena     : 1;    /* enabled */
    __u32 lm      : 2;    /* limit mode */
    __u32 mme     : 2;    /* measurement-mode enable */
    __u32 mp      : 1;    /* multipath mode */
    __u32 tf      : 1;    /* timing facility */
    __u32 dnv     : 1;    /* device number valid */
    __u32 dev     : 16;   /* device number */
    __u8  lpm;            /* logical path mask */
    __u8  pnom;           /* path not operational mask */
    __u8  lpum;           /* last path used mask */
    __u8  pim;            /* path installed mask */
    __u16 mbi;            /* measurement-block index */
    __u8  pom;            /* path operational mask */
    __u8  pam;            /* path available mask */
    __u8  chpid[8];       /* CHPID 0-7 (if available) */
    __u32 unused1 : 8;    /* reserved zeros */
    __u32 st      : 3;    /* subchannel type */
    __u32 unused2 : 18;   /* reserved zeros */
    __u32 mbfc    : 1;    /* measurement block format control */
    __u32 xmwme   : 1;    /* extended measurement word mode enable */
    __u32 csense  : 1;    /* concurrent sense; can be enabled ...*/
                /*  ... per MSCH, however, if facility */
                /*  ... is not installed, this results */
                /*  ... in an operand exception.       */
} __attribute__ ((packed));

/* Target SCHIB configuration. */
struct schib_config {
    __u64 mba;
    __u32 intparm;
    __u16 mbi;
    __u32 isc:3;
    __u32 ena:1;
    __u32 mme:2;
    __u32 mp:1;
    __u32 csense:1;
    __u32 mbfc:1;
} __attribute__ ((packed));

struct scsw {
    __u16 flags;
    __u16 ctrl;
    __u32 cpa;
    __u8 dstat;
    __u8 cstat;
    __u16 count;
} __attribute__ ((packed));

#define SCSW_FCTL_CLEAR_FUNC 0x1000
#define SCSW_FCTL_HALT_FUNC 0x2000
#define SCSW_FCTL_START_FUNC 0x4000

/*
 * subchannel information block
 */
struct schib {
    struct pmcw pmcw;     /* path management control word */
    struct scsw scsw;     /* subchannel status word */
    __u64 mba;            /* measurement block address */
    __u8 mda[4];          /* model dependent area */
} __attribute__ ((packed,aligned(4)));

struct subchannel_id {
        __u32 cssid  : 8;
        __u32        : 4;
        __u32 m      : 1;
        __u32 ssid   : 2;
        __u32 one    : 1;
        __u32 sch_no : 16;
} __attribute__ ((packed, aligned(4)));

struct chsc_header {
    __u16 length;
    __u16 code;
} __attribute__((packed));

struct chsc_area_sda {
    struct chsc_header request;
    __u8 reserved1:4;
    __u8 format:4;
    __u8 reserved2;
    __u16 operation_code;
    __u32 reserved3;
    __u32 reserved4;
    __u32 operation_data_area[252];
    struct chsc_header response;
    __u32 reserved5:4;
    __u32 format2:4;
    __u32 reserved6:24;
} __attribute__((packed));

/*
 * TPI info structure
 */
struct tpi_info {
    struct subchannel_id schid;
    __u32 intparm;         /* interruption parameter */
    __u32 adapter_IO : 1;
    __u32 reserved2  : 1;
    __u32 isc        : 3;
    __u32 reserved3  : 12;
    __u32 int_type   : 3;
    __u32 reserved4  : 12;
} __attribute__ ((packed));

/* channel command word (type 1) */
struct ccw1 {
    __u8 cmd_code;
    __u8 flags;
    __u16 count;
    __u32 cda;
} __attribute__ ((packed));

#define CCW_FLAG_DC              0x80
#define CCW_FLAG_CC              0x40
#define CCW_FLAG_SLI             0x20
#define CCW_FLAG_SKIP            0x10
#define CCW_FLAG_PCI             0x08
#define CCW_FLAG_IDA             0x04
#define CCW_FLAG_SUSPEND         0x02

#define CCW_CMD_NOOP             0x03
#define CCW_CMD_BASIC_SENSE      0x04
#define CCW_CMD_TIC              0x08
#define CCW_CMD_SENSE_ID         0xe4

#define CCW_CMD_SET_VQ           0x13
#define CCW_CMD_VDEV_RESET       0x33
#define CCW_CMD_READ_FEAT        0x12
#define CCW_CMD_WRITE_FEAT       0x11
#define CCW_CMD_READ_CONF        0x22
#define CCW_CMD_WRITE_CONF       0x21
#define CCW_CMD_WRITE_STATUS     0x31
#define CCW_CMD_SET_IND          0x43
#define CCW_CMD_SET_CONF_IND     0x53
#define CCW_CMD_READ_VQ_CONF     0x32

/*
 * Command-mode operation request block
 */
struct cmd_orb {
    __u32 intparm;    /* interruption parameter */
    __u32 key:4;      /* flags, like key, suspend control, etc. */
    __u32 spnd:1;     /* suspend control */
    __u32 res1:1;     /* reserved */
    __u32 mod:1;      /* modification control */
    __u32 sync:1;     /* synchronize control */
    __u32 fmt:1;      /* format control */
    __u32 pfch:1;     /* prefetch control */
    __u32 isic:1;     /* initial-status-interruption control */
    __u32 alcc:1;     /* address-limit-checking control */
    __u32 ssic:1;     /* suppress-suspended-interr. control */
    __u32 res2:1;     /* reserved */
    __u32 c64:1;      /* IDAW/QDIO 64 bit control  */
    __u32 i2k:1;      /* IDAW 2/4kB block size control */
    __u32 lpm:8;      /* logical path mask */
    __u32 ils:1;      /* incorrect length */
    __u32 zero:6;     /* reserved zeros */
    __u32 orbx:1;     /* ORB extension control */
    __u32 cpa;    /* channel program address */
}  __attribute__ ((packed, aligned(4)));

struct ciw {
    __u8 type;
    __u8 command;
    __u16 count;
};

/*
 * sense-id response buffer layout
 */
struct senseid {
    /* common part */
    __u8  reserved;   /* always 0x'FF' */
    __u16 cu_type;    /* control unit type */
    __u8  cu_model;   /* control unit model */
    __u16 dev_type;   /* device type */
    __u8  dev_model;  /* device model */
    __u8  unused;     /* padding byte */
    /* extended part */
    struct ciw ciw[62];
}  __attribute__ ((packed, aligned(4)));

/* interruption response block */
struct irb {
    struct scsw scsw;
    __u32 esw[5];
    __u32 ecw[8];
    __u32 emw[8];
}  __attribute__ ((packed, aligned(4)));

/*
 * Some S390 specific IO instructions as inline
 */

static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
{
    register struct subchannel_id reg1 asm ("1") = schid;
    int ccode = -EIO;

    asm volatile(
        "    stsch    0(%3)\n"
        "0:  ipm    %0\n"
        "    srl    %0,28\n"
        "1:\n"
        : "+d" (ccode), "=m" (*addr)
        : "d" (reg1), "a" (addr)
        : "cc");
    return ccode;
}

static inline int msch(struct subchannel_id schid, struct schib *addr)
{
    register struct subchannel_id reg1 asm ("1") = schid;
    int ccode;

    asm volatile(
        "    msch    0(%2)\n"
        "    ipm    %0\n"
        "    srl    %0,28"
        : "=d" (ccode)
        : "d" (reg1), "a" (addr), "m" (*addr)
        : "cc");
    return ccode;
}

static inline int msch_err(struct subchannel_id schid, struct schib *addr)
{
    register struct subchannel_id reg1 asm ("1") = schid;
    int ccode = -EIO;

    asm volatile(
        "    msch    0(%2)\n"
        "0:  ipm    %0\n"
        "    srl    %0,28\n"
        "1:\n"
        : "+d" (ccode)
        : "d" (reg1), "a" (addr), "m" (*addr)
        : "cc");
    return ccode;
}

static inline int tsch(struct subchannel_id schid, struct irb *addr)
{
    register struct subchannel_id reg1 asm ("1") = schid;
    int ccode;

    asm volatile(
        "    tsch    0(%3)\n"
        "    ipm    %0\n"
        "    srl    %0,28"
        : "=d" (ccode), "=m" (*addr)
        : "d" (reg1), "a" (addr)
        : "cc");
    return ccode;
}

static inline int ssch(struct subchannel_id schid, struct cmd_orb *addr)
{
    register struct subchannel_id reg1 asm("1") = schid;
    int ccode = -EIO;

    asm volatile(
        "    ssch    0(%2)\n"
        "0:  ipm    %0\n"
        "    srl    %0,28\n"
        "1:\n"
        : "+d" (ccode)
        : "d" (reg1), "a" (addr), "m" (*addr)
        : "cc", "memory");
    return ccode;
}

static inline int csch(struct subchannel_id schid)
{
    register struct subchannel_id reg1 asm("1") = schid;
    int ccode;

    asm volatile(
        "    csch\n"
        "    ipm    %0\n"
        "    srl    %0,28"
        : "=d" (ccode)
        : "d" (reg1)
        : "cc");
    return ccode;
}

static inline int tpi(struct tpi_info *addr)
{
    int ccode;

    asm volatile(
        "    tpi    0(%2)\n"
        "    ipm    %0\n"
        "    srl    %0,28"
        : "=d" (ccode), "=m" (*addr)
        : "a" (addr)
        : "cc");
    return ccode;
}

static inline int chsc(void *chsc_area)
{
    typedef struct { char _[4096]; } addr_type;
    int cc;

    asm volatile(
        "    .insn    rre,0xb25f0000,%2,0\n"
        "    ipm    %0\n"
        "    srl    %0,28\n"
        : "=d" (cc), "=m" (*(addr_type *) chsc_area)
        : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
        : "cc");
    return cc;
}

#endif /* CIO_H */
Commit	Line	Data
1e17c2c1 AG	1	/*
	2	* Channel IO definitions
	3	*
	4	* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
	5	*
	6	* Inspired by various s390 headers in Linux 3.9.
	7	*
	8	* This work is licensed under the terms of the GNU GPL, version 2 or (at
	9	* your option) any later version. See the COPYING file in the top-level
	10	* directory.
	11	*/
	12
	13	#ifndef CIO_H
	14	#define CIO_H
	15
	16	/*
	17	* path management control word
	18	*/
	19	struct pmcw {
	20	__u32 intparm; /* interruption parameter */
	21	__u32 qf : 1; /* qdio facility */
	22	__u32 w : 1;
	23	__u32 isc : 3; /* interruption sublass */
	24	__u32 res5 : 3; /* reserved zeros */
	25	__u32 ena : 1; /* enabled */
	26	__u32 lm : 2; /* limit mode */
	27	__u32 mme : 2; /* measurement-mode enable */
	28	__u32 mp : 1; /* multipath mode */
	29	__u32 tf : 1; /* timing facility */
	30	__u32 dnv : 1; /* device number valid */
	31	__u32 dev : 16; /* device number */
	32	__u8 lpm; /* logical path mask */
	33	__u8 pnom; /* path not operational mask */
	34	__u8 lpum; /* last path used mask */
	35	__u8 pim; /* path installed mask */
	36	__u16 mbi; /* measurement-block index */
	37	__u8 pom; /* path operational mask */
	38	__u8 pam; /* path available mask */
	39	__u8 chpid[8]; /* CHPID 0-7 (if available) */
	40	__u32 unused1 : 8; /* reserved zeros */
	41	__u32 st : 3; /* subchannel type */
	42	__u32 unused2 : 18; /* reserved zeros */
	43	__u32 mbfc : 1; /* measurement block format control */
	44	__u32 xmwme : 1; /* extended measurement word mode enable */
	45	__u32 csense : 1; /* concurrent sense; can be enabled ...*/
	46	/* ... per MSCH, however, if facility */
	47	/* ... is not installed, this results */
	48	/* ... in an operand exception. */
	49	} __attribute__ ((packed));
	50
	51	/* Target SCHIB configuration. */
	52	struct schib_config {
	53	__u64 mba;
	54	__u32 intparm;
	55	__u16 mbi;
	56	__u32 isc:3;
	57	__u32 ena:1;
	58	__u32 mme:2;
	59	__u32 mp:1;
	60	__u32 csense:1;
	61	__u32 mbfc:1;
	62	} __attribute__ ((packed));
	63
	64	struct scsw {
65	__u16 flags;
66	__u16 ctrl;
67	__u32 cpa;
68	__u8 dstat;
69	__u8 cstat;
70	__u16 count;
71	} __attribute__ ((packed));
72
73	#define SCSW_FCTL_CLEAR_FUNC 0x1000
74	#define SCSW_FCTL_HALT_FUNC 0x2000
75	#define SCSW_FCTL_START_FUNC 0x4000
76
77	/*
78	* subchannel information block
79	*/
80	struct schib {
81	struct pmcw pmcw; /* path management control word */
82	struct scsw scsw; /* subchannel status word */
83	__u64 mba; /* measurement block address */
84	__u8 mda[4]; /* model dependent area */
85	} __attribute__ ((packed,aligned(4)));
86
87	struct subchannel_id {
88	__u32 cssid : 8;
89	__u32 : 4;
90	__u32 m : 1;
91	__u32 ssid : 2;
92	__u32 one : 1;
93	__u32 sch_no : 16;
94	} __attribute__ ((packed, aligned(4)));
95
c8cda874 DD	96	struct chsc_header {
	97	__u16 length;
	98	__u16 code;
	99	} __attribute__((packed));
	100
	101	struct chsc_area_sda {
	102	struct chsc_header request;
	103	__u8 reserved1:4;
	104	__u8 format:4;
	105	__u8 reserved2;
	106	__u16 operation_code;
	107	__u32 reserved3;
	108	__u32 reserved4;
	109	__u32 operation_data_area[252];
	110	struct chsc_header response;
	111	__u32 reserved5:4;
	112	__u32 format2:4;
	113	__u32 reserved6:24;
	114	} __attribute__((packed));
	115
1e17c2c1 AG	116	/*
	117	* TPI info structure
	118	*/
	119	struct tpi_info {
	120	struct subchannel_id schid;
	121	__u32 intparm; /* interruption parameter */
	122	__u32 adapter_IO : 1;
	123	__u32 reserved2 : 1;
	124	__u32 isc : 3;
	125	__u32 reserved3 : 12;
	126	__u32 int_type : 3;
	127	__u32 reserved4 : 12;
	128	} __attribute__ ((packed));
	129
	130	/* channel command word (type 1) */
	131	struct ccw1 {
	132	__u8 cmd_code;
	133	__u8 flags;
	134	__u16 count;
	135	__u32 cda;
	136	} __attribute__ ((packed));
	137
	138	#define CCW_FLAG_DC 0x80
	139	#define CCW_FLAG_CC 0x40
	140	#define CCW_FLAG_SLI 0x20
	141	#define CCW_FLAG_SKIP 0x10
	142	#define CCW_FLAG_PCI 0x08
	143	#define CCW_FLAG_IDA 0x04
	144	#define CCW_FLAG_SUSPEND 0x02
	145
	146	#define CCW_CMD_NOOP 0x03
	147	#define CCW_CMD_BASIC_SENSE 0x04
	148	#define CCW_CMD_TIC 0x08
	149	#define CCW_CMD_SENSE_ID 0xe4
	150
	151	#define CCW_CMD_SET_VQ 0x13
	152	#define CCW_CMD_VDEV_RESET 0x33
	153	#define CCW_CMD_READ_FEAT 0x12
	154	#define CCW_CMD_WRITE_FEAT 0x11
	155	#define CCW_CMD_READ_CONF 0x22
	156	#define CCW_CMD_WRITE_CONF 0x21
	157	#define CCW_CMD_WRITE_STATUS 0x31
	158	#define CCW_CMD_SET_IND 0x43
	159	#define CCW_CMD_SET_CONF_IND 0x53
	160	#define CCW_CMD_READ_VQ_CONF 0x32
	161
	162	/*
	163	* Command-mode operation request block
	164	*/
	165	struct cmd_orb {
	166	__u32 intparm; /* interruption parameter */
	167	__u32 key:4; /* flags, like key, suspend control, etc. */
	168	__u32 spnd:1; /* suspend control */
	169	__u32 res1:1; /* reserved */
	170	__u32 mod:1; /* modification control */
	171	__u32 sync:1; /* synchronize control */
	172	__u32 fmt:1; /* format control */
	173	__u32 pfch:1; /* prefetch control */
	174	__u32 isic:1; /* initial-status-interruption control */
	175	__u32 alcc:1; /* address-limit-checking control */
	176	__u32 ssic:1; /* suppress-suspended-interr. control */
	177	__u32 res2:1; /* reserved */
	178	__u32 c64:1; /* IDAW/QDIO 64 bit control */
	179	__u32 i2k:1; /* IDAW 2/4kB block size control */
180	__u32 lpm:8; /* logical path mask */
181	__u32 ils:1; /* incorrect length */
182	__u32 zero:6; /* reserved zeros */
183	__u32 orbx:1; /* ORB extension control */
184	__u32 cpa; /* channel program address */
185	} __attribute__ ((packed, aligned(4)));
186
187	struct ciw {
188	__u8 type;
189	__u8 command;
190	__u16 count;
191	};
192
193	/*
194	* sense-id response buffer layout
195	*/
196	struct senseid {
197	/* common part */
198	__u8 reserved; /* always 0x'FF' */
199	__u16 cu_type; /* control unit type */
200	__u8 cu_model; /* control unit model */
201	__u16 dev_type; /* device type */
202	__u8 dev_model; /* device model */
203	__u8 unused; /* padding byte */
204	/* extended part */
205	struct ciw ciw[62];
206	} __attribute__ ((packed, aligned(4)));
207
208	/* interruption response block */
209	struct irb {
210	struct scsw scsw;
211	__u32 esw[5];
212	__u32 ecw[8];
213	__u32 emw[8];
214	} __attribute__ ((packed, aligned(4)));
215
216	/*
217	* Some S390 specific IO instructions as inline
218	*/
219
220	static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
221	{
222	register struct subchannel_id reg1 asm ("1") = schid;
223	int ccode = -EIO;
224
225	asm volatile(
226	" stsch 0(%3)\n"
227	"0: ipm %0\n"
228	" srl %0,28\n"
229	"1:\n"
230	: "+d" (ccode), "=m" (*addr)
231	: "d" (reg1), "a" (addr)
232	: "cc");
233	return ccode;
234	}
235
236	static inline int msch(struct subchannel_id schid, struct schib *addr)
237	{
238	register struct subchannel_id reg1 asm ("1") = schid;
239	int ccode;
240
241	asm volatile(
242	" msch 0(%2)\n"
243	" ipm %0\n"
244	" srl %0,28"
245	: "=d" (ccode)
246	: "d" (reg1), "a" (addr), "m" (*addr)
247	: "cc");
248	return ccode;
249	}
250
251	static inline int msch_err(struct subchannel_id schid, struct schib *addr)
252	{
253	register struct subchannel_id reg1 asm ("1") = schid;
254	int ccode = -EIO;
255
256	asm volatile(
257	" msch 0(%2)\n"
258	"0: ipm %0\n"
259	" srl %0,28\n"
260	"1:\n"
261	: "+d" (ccode)
262	: "d" (reg1), "a" (addr), "m" (*addr)
263	: "cc");
264	return ccode;
265	}
266
267	static inline int tsch(struct subchannel_id schid, struct irb *addr)
268	{
269	register struct subchannel_id reg1 asm ("1") = schid;
270	int ccode;
271
272	asm volatile(
273	" tsch 0(%3)\n"
274	" ipm %0\n"
275	" srl %0,28"
276	: "=d" (ccode), "=m" (*addr)
277	: "d" (reg1), "a" (addr)
278	: "cc");
279	return ccode;
280	}
281
282	static inline int ssch(struct subchannel_id schid, struct cmd_orb *addr)
283	{
284	register struct subchannel_id reg1 asm("1") = schid;
285	int ccode = -EIO;
286
287	asm volatile(
288	" ssch 0(%2)\n"
289	"0: ipm %0\n"
290	" srl %0,28\n"
291	"1:\n"
292	: "+d" (ccode)
293	: "d" (reg1), "a" (addr), "m" (*addr)
294	: "cc", "memory");
295	return ccode;
296	}
297
298	static inline int csch(struct subchannel_id schid)
299	{
300	register struct subchannel_id reg1 asm("1") = schid;
301	int ccode;
302
303	asm volatile(
304	" csch\n"
305	" ipm %0\n"
306	" srl %0,28"
307	: "=d" (ccode)
308	: "d" (reg1)
309	: "cc");
310	return ccode;
311	}
312
313	static inline int tpi(struct tpi_info *addr)
314	{
315	int ccode;
316
317	asm volatile(
318	" tpi 0(%2)\n"
319	" ipm %0\n"
320	" srl %0,28"
321	: "=d" (ccode), "=m" (*addr)
322	: "a" (addr)
323	: "cc");
324	return ccode;
325	}
326
327	static inline int chsc(void *chsc_area)
328	{
329	typedef struct { char _[4096]; } addr_type;
330	int cc;
331
332	asm volatile(
333	" .insn rre,0xb25f0000,%2,0\n"
334	" ipm %0\n"
335	" srl %0,28\n"
336	: "=d" (cc), "=m" ((addr_type ) chsc_area)
337	: "d" (chsc_area), "m" ((addr_type ) chsc_area)
338	: "cc");
339	return cc;
340	}
341
342	#endif /* CIO_H */