// SPDX-License-Identifier: GPL-2.0 /* * s390 crypto adapter related sclp functions. * * Copyright IBM Corp. 2020 */ #define pr_fmt(fmt) "sclp_cmd: " 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);