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Commit 30c2df51 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

[S390] sclp: event buffer dissection 



Move gds vector/subvector find functions to the sclp header file.
Simplify event buffer dissection in sclp tty code.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent fca894ed

drivers/s390/char/sclp.h

+22 −0
Original line number Diff line number Diff line
@@ -186,4 +186,26 @@ 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__ */

drivers/s390/char/sclp_tty.c

+38 −84
Original line number Diff line number Diff line
@@ -408,118 +408,72 @@ static int sclp_switch_cases(unsigned char *buf, int count) 
	return op - buf;

}



static void

sclp_get_input(unsigned char *start, unsigned char *end)

static void sclp_get_input(struct gds_subvector *sv)

{

	unsigned char *str;

	int count;



	count = end - start;

	str = (unsigned char *) (sv + 1);

	count = sv->length - sizeof(*sv);

	if (sclp_tty_tolower)

		EBC_TOLOWER(start, count);

	count = sclp_switch_cases(start, count);

		EBC_TOLOWER(str, count);

	count = sclp_switch_cases(str, count);

	/* convert EBCDIC to ASCII (modify original input in SCCB) */

	sclp_ebcasc_str(start, count);

	sclp_ebcasc_str(str, count);



	/* transfer input to high level driver */

	sclp_tty_input(start, count);

}



static inline struct gds_vector *

find_gds_vector(struct gds_vector *start, struct gds_vector *end, u16 id)

{

	struct gds_vector *vec;



	for (vec = start; vec < end; vec = (void *) vec + vec->length)

		if (vec->gds_id == id)

			return vec;

	return NULL;

	sclp_tty_input(str, count);

}



static inline struct gds_subvector *

find_gds_subvector(struct gds_subvector *start,

		   struct gds_subvector *end, u8 key)

static inline void sclp_eval_selfdeftextmsg(struct gds_subvector *sv)

{

	struct gds_subvector *subvec;

	void *end;



	for (subvec = start; subvec < end;

	     subvec = (void *) subvec + subvec->length)

		if (subvec->key == key)

			return subvec;

	return NULL;

	end = (void *) sv + sv->length;

	for (sv = sv + 1; (void *) sv < end; sv = (void *) sv + sv->length)

		if (sv->key == 0x30)

			sclp_get_input(sv);

}



static inline void

sclp_eval_selfdeftextmsg(struct gds_subvector *start,

			 struct gds_subvector *end)

static inline void sclp_eval_textcmd(struct gds_vector *v)

{

	struct gds_subvector *subvec;



	subvec = start;

	while (subvec < end) {

		subvec = find_gds_subvector(subvec, end, 0x30);

		if (!subvec)

			break;

		sclp_get_input((unsigned char *)(subvec + 1),

			       (unsigned char *) subvec + subvec->length);

		subvec = (void *) subvec + subvec->length;

	}

}

	struct gds_subvector *sv;

	void *end;



static inline void

sclp_eval_textcmd(struct gds_subvector *start,

		  struct gds_subvector *end)

{

	struct gds_subvector *subvec;

	end = (void *) v + v->length;

	for (sv = (struct gds_subvector *) (v + 1);

	     (void *) sv < end; sv = (void *) sv + sv->length)

		if (sv->key == GDS_KEY_SELFDEFTEXTMSG)

			sclp_eval_selfdeftextmsg(sv);



	subvec = start;

	while (subvec < end) {

		subvec = find_gds_subvector(subvec, end,

					    GDS_KEY_SELFDEFTEXTMSG);

		if (!subvec)

			break;

		sclp_eval_selfdeftextmsg((struct gds_subvector *)(subvec + 1),

					 (void *)subvec + subvec->length);

		subvec = (void *) subvec + subvec->length;

	}

}



static inline void

sclp_eval_cpmsu(struct gds_vector *start, struct gds_vector *end)

static inline void sclp_eval_cpmsu(struct gds_vector *v)

{

	struct gds_vector *vec;

	void *end;



	vec = start;

	while (vec < end) {

		vec = find_gds_vector(vec, end, GDS_ID_TEXTCMD);

		if (!vec)

			break;

		sclp_eval_textcmd((struct gds_subvector *)(vec + 1),

				  (void *) vec + vec->length);

		vec = (void *) vec + vec->length;

	}

	end = (void *) v + v->length;

	for (v = v + 1; (void *) v < end; v = (void *) v + v->length)

		if (v->gds_id == GDS_ID_TEXTCMD)

			sclp_eval_textcmd(v);

}





static inline void

sclp_eval_mdsmu(struct gds_vector *start, void *end)

static inline void sclp_eval_mdsmu(struct gds_vector *v)

{

	struct gds_vector *vec;



	vec = find_gds_vector(start, end, GDS_ID_CPMSU);

	if (vec)

		sclp_eval_cpmsu(vec + 1, (void *) vec + vec->length);

	v = sclp_find_gds_vector(v + 1, (void *) v + v->length, GDS_ID_CPMSU);

	if (v)

		sclp_eval_cpmsu(v);

}



static void

sclp_tty_receiver(struct evbuf_header *evbuf)

static void sclp_tty_receiver(struct evbuf_header *evbuf)

{

	struct gds_vector *start, *end, *vec;

	struct gds_vector *v;



	start = (struct gds_vector *)(evbuf + 1);

	end = (void *) evbuf + evbuf->length;

	vec = find_gds_vector(start, end, GDS_ID_MDSMU);

	if (vec)

		sclp_eval_mdsmu(vec + 1, (void *) vec + vec->length);

	v = sclp_find_gds_vector(evbuf + 1, (void *) evbuf + evbuf->length,

				 GDS_ID_MDSMU);

	if (v)

		sclp_eval_mdsmu(v);

}



static void