1 /* SPDX-License-Identifier: GPL-2.0-only */
29 	"Request-block error",
32 	"Absolute address of channel-subsystem communication block exceeds 2G - 1.",
34 	"Invalid channel-subsystem identification (CSSID)",
35 	"The command-request block specified an invalid format for the command response block.",
36 	"Invalid subchannel-set identification (SSID)",
44 	if (h->code == CHSC_RSP_OK)  in check_response()
47 	if (h->code > CHSC_RSP_MAX)  in check_response()
48 		h->code = 0;  in check_response()
50 	report_abort("Response code %04x: %s", h->code,  in check_response()
51 		      chsc_rsp_description[h->code]);  in check_response()
59 	h->code = code;  in chsc()
60 	h->len = len;  in chsc()
148 		if (!(pmcw->flags & PMCW_DNV))  in css_enumerate()
183 	if (!(pmcw->flags & PMCW_ENABLE)) {  in css_enabled()
192  * @isc  : number of the interruption subclass to use
196  *      or -1 if the retry count is exceeded.
205 	/* Read the SCHIB for this subchannel */  in css_enable()
213 	if ((pmcw->flags & (PMCW_ISC_MASK | PMCW_ENABLE)) == flags) {  in css_enable()
219 	/* Update the SCHIB to enable the channel and set the ISC */  in css_enable()
220 	pmcw->flags &= ~PMCW_ISC_MASK;  in css_enable()
221 	pmcw->flags |= flags;  in css_enable()
223 	/* Tell the CSS we want to modify the subchannel */  in css_enable()
236 	 * Read the SCHIB again to verify the enablement  in css_enable()
247 		    schid, retry_count, pmcw->flags);  in css_enable()
248 	return -1;  in css_enable()
256  * @flags : PMCW_MBUE to enable measurement block update
257  *	    PMCW_DCTME to enable device connect time
258  *	    0 to disable measurement
259  * @format1: set if format 1 is to be used
267 	/* Read the SCHIB for this subchannel */  in schib_update_mb()
274 	/* Update the SCHIB to enable the measurement block */  in schib_update_mb()
276 		pmcw->flags |= flags;  in schib_update_mb()
279 			pmcw->flags2 |= PMCW_MBF1;  in schib_update_mb()
281 			pmcw->flags2 &= ~PMCW_MBF1;  in schib_update_mb()
283 		pmcw->mbi = mbi;  in schib_update_mb()
286 		pmcw->flags &= ~(PMCW_MBUE | PMCW_DCTME);  in schib_update_mb()
289 	/* Tell the CSS we want to modify the subchannel */  in schib_update_mb()
302 	 * Read the SCHIB again  in schib_update_mb()
318  * @format1: set if format 1 is to be used
320  * @flags : PMCW_MBUE to enable measurement block update
321  *	    PMCW_DCTME to enable device connect time
329 	while (retry_count-- &&  in css_enable_mb()
333 	return schib.mbo == mb && pmcw->mbi == mbi;  in css_enable_mb()
344 	while (retry_count-- &&  in css_disable_mb()
412 	ccw->code = code;  in ccw_alloc()
413 	ccw->flags = flags;  in ccw_alloc()
414 	ccw->count = count;  in ccw_alloc()
415 	ccw->data_address = (int)(unsigned long)data;  in ccw_alloc()
423  * Makes the most common check to validate a successful I/O
438 		ret = -1;  in wait_and_check_io_completion()
446 		ret = -1;  in wait_and_check_io_completion()
453 		ret = -1;  in wait_and_check_io_completion()
460 		ret = -1;  in wait_and_check_io_completion()
466 		ret = -1;  in wait_and_check_io_completion()
481  * Not meaningful: -1 (-1 can not be a valid count)
487 		return -1;  in css_residual_count()
491 			return -1;  in css_residual_count()
510 	return schib->pmcw.pim & BIT(7 - chp_idx);  in is_path_installed()
515  * @sid: subsystem-identification word
518  * returns 0 on success, -1 if no chpid found any other value
538 	return -1;  in css_find_installed_chpid()
543  * @sid: subsystem-identification word
545  * returns 0 when a CRW was generated, -1 if no chpid found.
557 		return -1;  in css_generate_crw()