1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * s390 crypto adapter related sclp functions.
 4 *
 5 * Copyright IBM Corp. 2020
 6 */
 7#define KMSG_COMPONENT "sclp_cmd"
 8#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 9
10#include <linux/export.h>
11#include <linux/slab.h>
12#include <asm/sclp.h>
13#include "sclp.h"
14
15#define SCLP_CMDW_CONFIGURE_AP			0x001f0001
16#define SCLP_CMDW_DECONFIGURE_AP		0x001e0001
17
18struct ap_cfg_sccb {
19	struct sccb_header header;
20} __packed;
21
22static int do_ap_configure(sclp_cmdw_t cmd, u32 apid)
23{
24	struct ap_cfg_sccb *sccb;
25	int rc;
26
27	if (!SCLP_HAS_AP_RECONFIG)
28		return -EOPNOTSUPP;
29
30	sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
31	if (!sccb)
32		return -ENOMEM;
33
34	sccb->header.length = PAGE_SIZE;
35	cmd |= (apid & 0xFF) << 8;
36	rc = sclp_sync_request(cmd, sccb);
37	if (rc)
38		goto out;
39	switch (sccb->header.response_code) {
40	case 0x0020: case 0x0120: case 0x0440: case 0x0450:
41		break;
42	default:
43		pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n",
44			apid, cmd, sccb->header.response_code);
45		rc = -EIO;
46		break;
47	}
48out:
49	free_page((unsigned long) sccb);
50	return rc;
51}
52
53int sclp_ap_configure(u32 apid)
54{
55	return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid);
56}
57EXPORT_SYMBOL(sclp_ap_configure);
58
59int sclp_ap_deconfigure(u32 apid)
60{
61	return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid);
62}
63EXPORT_SYMBOL(sclp_ap_deconfigure);

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * s390 crypto adapter related sclp functions.
 4 *
 5 * Copyright IBM Corp. 2020
 6 */
 7#define KMSG_COMPONENT "sclp_cmd"
 8#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 9
10#include <linux/export.h>
11#include <linux/slab.h>
12#include <asm/sclp.h>
13#include "sclp.h"
14
15#define SCLP_CMDW_CONFIGURE_AP			0x001f0001
16#define SCLP_CMDW_DECONFIGURE_AP		0x001e0001
17
18struct ap_cfg_sccb {
19	struct sccb_header header;
20} __packed;
21
22static int do_ap_configure(sclp_cmdw_t cmd, u32 apid)
23{
24	struct ap_cfg_sccb *sccb;
25	int rc;
26
27	if (!SCLP_HAS_AP_RECONFIG)
28		return -EOPNOTSUPP;
29
30	sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
31	if (!sccb)
32		return -ENOMEM;
33
34	sccb->header.length = PAGE_SIZE;
35	cmd |= (apid & 0xFF) << 8;
36	rc = sclp_sync_request(cmd, sccb);
37	if (rc)
38		goto out;
39	switch (sccb->header.response_code) {
40	case 0x0020: case 0x0120: case 0x0440: case 0x0450:
41		break;
42	default:
43		pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n",
44			apid, cmd, sccb->header.response_code);
45		rc = -EIO;
46		break;
47	}
48out:
49	free_page((unsigned long) sccb);
50	return rc;
51}
52
53int sclp_ap_configure(u32 apid)
54{
55	return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid);
56}
57EXPORT_SYMBOL(sclp_ap_configure);
58
59int sclp_ap_deconfigure(u32 apid)
60{
61	return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid);
62}
63EXPORT_SYMBOL(sclp_ap_deconfigure);