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// SPDX-License-Identifier: GPL-2.0
/*
* s390 crypto adapter related sclp functions.
*
* Copyright IBM Corp. 2020
*/
#define KMSG_COMPONENT "sclp_cmd"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/export.h>
#include <linux/slab.h>
#include <asm/sclp.h>
#include "sclp.h"
#define SCLP_CMDW_CONFIGURE_AP 0x001f0001
#define SCLP_CMDW_DECONFIGURE_AP 0x001e0001
struct ap_cfg_sccb {
struct sccb_header header;
} __packed;
static int do_ap_configure(sclp_cmdw_t cmd, u32 apid)
{
struct ap_cfg_sccb *sccb;
int rc;
if (!SCLP_HAS_AP_RECONFIG)
return -EOPNOTSUPP;
sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sccb)
return -ENOMEM;
sccb->header.length = PAGE_SIZE;
cmd |= (apid & 0xFF) << 8;
rc = sclp_sync_request(cmd, sccb);
if (rc)
goto out;
switch (sccb->header.response_code) {
case 0x0020: case 0x0120: case 0x0440: case 0x0450:
break;
default:
pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n",
apid, cmd, sccb->header.response_code);
rc = -EIO;
break;
}
out:
free_page((unsigned long) sccb);
return rc;
}
int sclp_ap_configure(u32 apid)
{
return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid);
}
EXPORT_SYMBOL(sclp_ap_configure);
int sclp_ap_deconfigure(u32 apid)
{
return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid);
}
EXPORT_SYMBOL(sclp_ap_deconfigure);
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