1 // SPDX-License-Identifier: GPL-2.0
3 * s390 crypto adapter related sclp functions.
5 * Copyright IBM Corp. 2020
7 #define KMSG_COMPONENT "sclp_cmd"
8 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
10 #include <linux/export.h>
11 #include <linux/slab.h>
15 #define SCLP_CMDW_CONFIGURE_AP 0x001f0001
16 #define SCLP_CMDW_DECONFIGURE_AP 0x001e0001
19 struct sccb_header header;
22 static int do_ap_configure(sclp_cmdw_t cmd, u32 apid)
24 struct ap_cfg_sccb *sccb;
27 if (!SCLP_HAS_AP_RECONFIG)
30 sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
34 sccb->header.length = PAGE_SIZE;
35 cmd |= (apid & 0xFF) << 8;
36 rc = sclp_sync_request(cmd, sccb);
39 switch (sccb->header.response_code) {
40 case 0x0020: case 0x0120: case 0x0440: case 0x0450:
43 pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n",
44 apid, cmd, sccb->header.response_code);
49 free_page((unsigned long) sccb);
53 int sclp_ap_configure(u32 apid)
55 return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid);
57 EXPORT_SYMBOL(sclp_ap_configure);
59 int sclp_ap_deconfigure(u32 apid)
61 return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid);
63 EXPORT_SYMBOL(sclp_ap_deconfigure);