Orange Pi5 kernel

// 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);