Commit 184b08af authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/chsc: implement store SCM information 



chsc_scm_info will be used to detect all available increments of
storage class memory.

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent d2fc439b

drivers/s390/cio/chsc.c

+35 −0
Original line number Diff line number Diff line
@@ -52,6 +52,11 @@ int chsc_error_from_response(int response) 
		return -EINVAL;

	case 0x0004:

		return -EOPNOTSUPP;

	case 0x000b:

		return -EBUSY;

	case 0x0100:

	case 0x0102:

		return -ENOMEM;

	default:

		return -EIO;

	}
@@ -1047,3 +1052,33 @@ int chsc_siosl(struct subchannel_id schid) 
	return rc;

}

EXPORT_SYMBOL_GPL(chsc_siosl);



/**

 * chsc_scm_info() - store SCM information (SSI)

 * @scm_area: request and response block for SSI

 * @token: continuation token

 *

 * Returns 0 on success.

 */

int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)

{

	int ccode, ret;



	memset(scm_area, 0, sizeof(*scm_area));

	scm_area->request.length = 0x0020;

	scm_area->request.code = 0x004C;

	scm_area->reqtok = token;



	ccode = chsc(scm_area);

	if (ccode > 0) {

		ret = (ccode == 3) ? -ENODEV : -EBUSY;

		goto out;

	}

	ret = chsc_error_from_response(scm_area->response.code);

	if (ret != 0)

		CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",

			      scm_area->response.code);

out:

	return ret;

}

EXPORT_SYMBOL_GPL(chsc_scm_info);

drivers/s390/cio/chsc.h

+35 −0
Original line number Diff line number Diff line
@@ -119,4 +119,39 @@ int chsc_error_from_response(int response); 


int chsc_siosl(struct subchannel_id schid);



/* Functions and definitions to query storage-class memory. */

struct sale {

	u64 sa;

	u32 p:4;

	u32 op_state:4;

	u32 data_state:4;

	u32 rank:4;

	u32 r:1;

	u32:7;

	u32 rid:8;

	u32:32;

} __packed;



struct chsc_scm_info {

	struct chsc_header request;

	u32:32;

	u64 reqtok;

	u32 reserved1[4];

	struct chsc_header response;

	u64:56;

	u8 rq;

	u32 mbc;

	u64 msa;

	u16 is;

	u16 mmc;

	u32 mci;

	u64 nr_scm_ini;

	u64 nr_scm_unini;

	u32 reserved2[10];

	u64 restok;

	struct sale scmal[248];

} __packed;



int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);



#endif