From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/s390/char/sclp_ap.c | 63 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 drivers/s390/char/sclp_ap.c (limited to 'drivers/s390/char/sclp_ap.c') diff --git a/drivers/s390/char/sclp_ap.c b/drivers/s390/char/sclp_ap.c new file mode 100644 index 000000000..0dd1ca712 --- /dev/null +++ b/drivers/s390/char/sclp_ap.c @@ -0,0 +1,63 @@ +// 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 +#include +#include +#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); -- cgit v1.2.3