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 18 struct ap_cfg_sccb { 19 struct sccb_header header; 20 } __packed; 21 do_ap_configure(sclp_cmdw_t cmd,u32 apid)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 } 48 out: 49 free_page((unsigned long) sccb); 50 return rc; 51 } 52 sclp_ap_configure(u32 apid)53int sclp_ap_configure(u32 apid) 54 { 55 return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid); 56 } 57 EXPORT_SYMBOL(sclp_ap_configure); 58 sclp_ap_deconfigure(u32 apid)59int sclp_ap_deconfigure(u32 apid) 60 { 61 return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid); 62 } 63 EXPORT_SYMBOL(sclp_ap_deconfigure); 64