Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 348 insertions, 0 deletions

diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
new file mode 100644
index 000000000..1fe491808
--- /dev/null
+++ b/drivers/s390/char/sclp.h
@@ -0,0 +1,348 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999,2012
+ *
+ * Author(s): Martin Peschke <mpeschke@de.ibm.com>
+ *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef __SCLP_H__
+#define __SCLP_H__
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <asm/sclp.h>
+#include <asm/ebcdic.h>
+
+/* maximum number of pages concerning our own memory management */
+#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
+#define SCLP_CONSOLE_PAGES	6
+
+#define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T)))
+
+#define EVTYP_OPCMD		0x01
+#define EVTYP_MSG		0x02
+#define EVTYP_CONFMGMDATA	0x04
+#define EVTYP_DIAG_TEST		0x07
+#define EVTYP_STATECHANGE	0x08
+#define EVTYP_PMSGCMD		0x09
+#define EVTYP_ASYNC		0x0A
+#define EVTYP_CTLPROGIDENT	0x0B
+#define EVTYP_STORE_DATA	0x0C
+#define EVTYP_ERRNOTIFY		0x18
+#define EVTYP_VT220MSG		0x1A
+#define EVTYP_SDIAS		0x1C
+#define EVTYP_SIGQUIESCE	0x1D
+#define EVTYP_OCF		0x1E
+
+#define EVTYP_OPCMD_MASK	SCLP_EVTYP_MASK(EVTYP_OPCMD)
+#define EVTYP_MSG_MASK		SCLP_EVTYP_MASK(EVTYP_MSG)
+#define EVTYP_CONFMGMDATA_MASK	SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
+#define EVTYP_DIAG_TEST_MASK	SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
+#define EVTYP_STATECHANGE_MASK	SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
+#define EVTYP_PMSGCMD_MASK	SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
+#define EVTYP_ASYNC_MASK	SCLP_EVTYP_MASK(EVTYP_ASYNC)
+#define EVTYP_CTLPROGIDENT_MASK	SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
+#define EVTYP_STORE_DATA_MASK	SCLP_EVTYP_MASK(EVTYP_STORE_DATA)
+#define EVTYP_ERRNOTIFY_MASK	SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
+#define EVTYP_VT220MSG_MASK	SCLP_EVTYP_MASK(EVTYP_VT220MSG)
+#define EVTYP_SDIAS_MASK	SCLP_EVTYP_MASK(EVTYP_SDIAS)
+#define EVTYP_SIGQUIESCE_MASK	SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
+#define EVTYP_OCF_MASK		SCLP_EVTYP_MASK(EVTYP_OCF)
+
+#define GNRLMSGFLGS_DOM		0x8000
+#define GNRLMSGFLGS_SNDALRM	0x4000
+#define GNRLMSGFLGS_HOLDMSG	0x2000
+
+#define LNTPFLGS_CNTLTEXT	0x8000
+#define LNTPFLGS_LABELTEXT	0x4000
+#define LNTPFLGS_DATATEXT	0x2000
+#define LNTPFLGS_ENDTEXT	0x1000
+#define LNTPFLGS_PROMPTTEXT	0x0800
+
+typedef unsigned int sclp_cmdw_t;
+
+#define SCLP_CMDW_READ_CPU_INFO		0x00010001
+#define SCLP_CMDW_READ_EVENT_DATA	0x00770005
+#define SCLP_CMDW_WRITE_EVENT_DATA	0x00760005
+#define SCLP_CMDW_WRITE_EVENT_MASK	0x00780005
+
+#define GDS_ID_MDSMU		0x1310
+#define GDS_ID_MDSROUTEINFO	0x1311
+#define GDS_ID_AGUNWRKCORR	0x1549
+#define GDS_ID_SNACONDREPORT	0x1532
+#define GDS_ID_CPMSU		0x1212
+#define GDS_ID_ROUTTARGINSTR	0x154D
+#define GDS_ID_OPREQ		0x8070
+#define GDS_ID_TEXTCMD		0x1320
+
+#define GDS_KEY_SELFDEFTEXTMSG	0x31
+
+enum sclp_pm_event {
+	SCLP_PM_EVENT_FREEZE,
+	SCLP_PM_EVENT_THAW,
+	SCLP_PM_EVENT_RESTORE,
+};
+
+#define SCLP_PANIC_PRIO		1
+#define SCLP_PANIC_PRIO_CLIENT	0
+
+typedef u64 sccb_mask_t;
+
+struct sccb_header {
+	u16	length;
+	u8	function_code;
+	u8	control_mask[3];
+	u16	response_code;
+} __attribute__((packed));
+
+struct init_sccb {
+	struct sccb_header header;
+	u16 _reserved;
+	u16 mask_length;
+	u8 masks[4 * 1021];	/* variable length */
+	/*
+	 * u8 receive_mask[mask_length];
+	 * u8 send_mask[mask_length];
+	 * u8 sclp_receive_mask[mask_length];
+	 * u8 sclp_send_mask[mask_length];
+	 */
+} __attribute__((packed));
+
+#define SCLP_MASK_SIZE_COMPAT 4
+
+static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
+{
+	sccb_mask_t res = 0;
+
+	memcpy(&res, masks + i * len, min(sizeof(res), len));
+	return res;
+}
+
+static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
+{
+	memset(masks + i * len, 0, len);
+	memcpy(masks + i * len, &val, min(sizeof(val), len));
+}
+
+#define sccb_get_generic_mask(sccb, i)					\
+({									\
+	__typeof__(sccb) __sccb = sccb;					\
+									\
+	sccb_get_mask(__sccb->masks, __sccb->mask_length, i);		\
+})
+#define sccb_get_recv_mask(sccb)	sccb_get_generic_mask(sccb, 0)
+#define sccb_get_send_mask(sccb)	sccb_get_generic_mask(sccb, 1)
+#define sccb_get_sclp_recv_mask(sccb)	sccb_get_generic_mask(sccb, 2)
+#define sccb_get_sclp_send_mask(sccb)	sccb_get_generic_mask(sccb, 3)
+
+#define sccb_set_generic_mask(sccb, i, val)				\
+({									\
+	__typeof__(sccb) __sccb = sccb;					\
+									\
+	sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val);	\
+})
+#define sccb_set_recv_mask(sccb, val)	    sccb_set_generic_mask(sccb, 0, val)
+#define sccb_set_send_mask(sccb, val)	    sccb_set_generic_mask(sccb, 1, val)
+#define sccb_set_sclp_recv_mask(sccb, val)  sccb_set_generic_mask(sccb, 2, val)
+#define sccb_set_sclp_send_mask(sccb, val)  sccb_set_generic_mask(sccb, 3, val)
+
+struct read_cpu_info_sccb {
+	struct	sccb_header header;
+	u16	nr_configured;
+	u16	offset_configured;
+	u16	nr_standby;
+	u16	offset_standby;
+	u8	reserved[4096 - 16];
+} __attribute__((packed, aligned(PAGE_SIZE)));
+
+static inline void sclp_fill_core_info(struct sclp_core_info *info,
+				       struct read_cpu_info_sccb *sccb)
+{
+	char *page = (char *) sccb;
+
+	memset(info, 0, sizeof(*info));
+	info->configured = sccb->nr_configured;
+	info->standby = sccb->nr_standby;
+	info->combined = sccb->nr_configured + sccb->nr_standby;
+	memcpy(&info->core, page + sccb->offset_configured,
+	       info->combined * sizeof(struct sclp_core_entry));
+}
+
+#define SCLP_HAS_CHP_INFO	(sclp.facilities & 0x8000000000000000ULL)
+#define SCLP_HAS_CHP_RECONFIG	(sclp.facilities & 0x2000000000000000ULL)
+#define SCLP_HAS_CPU_INFO	(sclp.facilities & 0x0800000000000000ULL)
+#define SCLP_HAS_CPU_RECONFIG	(sclp.facilities & 0x0400000000000000ULL)
+#define SCLP_HAS_PCI_RECONFIG	(sclp.facilities & 0x0000000040000000ULL)
+
+
+struct gds_subvector {
+	u8	length;
+	u8	key;
+} __attribute__((packed));
+
+struct gds_vector {
+	u16	length;
+	u16	gds_id;
+} __attribute__((packed));
+
+struct evbuf_header {
+	u16	length;
+	u8	type;
+	u8	flags;
+	u16	_reserved;
+} __attribute__((packed));
+
+struct sclp_req {
+	struct list_head list;		/* list_head for request queueing. */
+	sclp_cmdw_t command;		/* sclp command to execute */
+	void	*sccb;			/* pointer to the sccb to execute */
+	char	status;			/* status of this request */
+	int     start_count;		/* number of SVCs done for this req */
+	/* Callback that is called after reaching final status. */
+	void (*callback)(struct sclp_req *, void *data);
+	void *callback_data;
+	int queue_timeout;		/* request queue timeout (sec), set by
+					   caller of sclp_add_request(), if
+					   needed */
+	/* Internal fields */
+	unsigned long queue_expires;	/* request queue timeout (jiffies) */
+};
+
+#define SCLP_REQ_FILLED	  0x00	/* request is ready to be processed */
+#define SCLP_REQ_QUEUED	  0x01	/* request is queued to be processed */
+#define SCLP_REQ_RUNNING  0x02	/* request is currently running */
+#define SCLP_REQ_DONE	  0x03	/* request is completed successfully */
+#define SCLP_REQ_FAILED	  0x05	/* request is finally failed */
+#define SCLP_REQ_QUEUED_TIMEOUT 0x06	/* request on queue timed out */
+
+#define SCLP_QUEUE_INTERVAL 5	/* timeout interval for request queue */
+
+/* function pointers that a high level driver has to use for registration */
+/* of some routines it wants to be called from the low level driver */
+struct sclp_register {
+	struct list_head list;
+	/* User wants to receive: */
+	sccb_mask_t receive_mask;
+	/* User wants to send: */
+	sccb_mask_t send_mask;
+	/* H/W can receive: */
+	sccb_mask_t sclp_receive_mask;
+	/* H/W can send: */
+	sccb_mask_t sclp_send_mask;
+	/* called if event type availability changes */
+	void (*state_change_fn)(struct sclp_register *);
+	/* called for events in cp_receive_mask/sclp_receive_mask */
+	void (*receiver_fn)(struct evbuf_header *);
+	/* called for power management events */
+	void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
+	/* pm event posted flag */
+	int pm_event_posted;
+};
+
+/* externals from sclp.c */
+int sclp_add_request(struct sclp_req *req);
+void sclp_sync_wait(void);
+int sclp_register(struct sclp_register *reg);
+void sclp_unregister(struct sclp_register *reg);
+int sclp_remove_processed(struct sccb_header *sccb);
+int sclp_deactivate(void);
+int sclp_reactivate(void);
+int sclp_sync_request(sclp_cmdw_t command, void *sccb);
+int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
+
+int sclp_sdias_init(void);
+void sclp_sdias_exit(void);
+
+enum {
+	sclp_init_state_uninitialized,
+	sclp_init_state_initializing,
+	sclp_init_state_initialized
+};
+
+extern int sclp_init_state;
+extern int sclp_console_pages;
+extern int sclp_console_drop;
+extern unsigned long sclp_console_full;
+extern bool sclp_mask_compat_mode;
+
+extern char sclp_early_sccb[PAGE_SIZE];
+
+void sclp_early_wait_irq(void);
+int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
+unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
+unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
+int sclp_early_set_event_mask(struct init_sccb *sccb,
+			      sccb_mask_t receive_mask,
+			      sccb_mask_t send_mask);
+
+/* useful inlines */
+
+/* Perform service call. Return 0 on success, non-zero otherwise. */
+static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
+{
+	int cc = 4; /* Initialize for program check handling */
+
+	asm volatile(
+		"0:	.insn	rre,0xb2200000,%1,%2\n"	 /* servc %1,%2 */
+		"1:	ipm	%0\n"
+		"	srl	%0,28\n"
+		"2:\n"
+		EX_TABLE(0b, 2b)
+		EX_TABLE(1b, 2b)
+		: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
+		: "cc", "memory");
+	if (cc == 4)
+		return -EINVAL;
+	if (cc == 3)
+		return -EIO;
+	if (cc == 2)
+		return -EBUSY;
+	return 0;
+}
+
+/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
+/* translate single character from ASCII to EBCDIC */
+static inline unsigned char
+sclp_ascebc(unsigned char ch)
+{
+	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
+}
+
+/* translate string from EBCDIC to ASCII */
+static inline void
+sclp_ebcasc_str(unsigned char *str, int nr)
+{
+	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
+}
+
+/* translate string from ASCII to EBCDIC */
+static inline void
+sclp_ascebc_str(unsigned char *str, int nr)
+{
+	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
+}
+
+static inline struct gds_vector *
+sclp_find_gds_vector(void *start, void *end, u16 id)
+{
+	struct gds_vector *v;
+
+	for (v = start; (void *) v < end; v = (void *) v + v->length)
+		if (v->gds_id == id)
+			return v;
+	return NULL;
+}
+
+static inline struct gds_subvector *
+sclp_find_gds_subvector(void *start, void *end, u8 key)
+{
+	struct gds_subvector *sv;
+
+	for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
+		if (sv->key == key)
+			return sv;
+	return NULL;
+}
+
+#endif	 /* __SCLP_H__ */