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63 lines
1.3 KiB
63 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* s390 crypto adapter related sclp functions. |
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* |
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* Copyright IBM Corp. 2020 |
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*/ |
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#define KMSG_COMPONENT "sclp_cmd" |
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
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#include <linux/export.h> |
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#include <linux/slab.h> |
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#include <asm/sclp.h> |
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#include "sclp.h" |
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#define SCLP_CMDW_CONFIGURE_AP 0x001f0001 |
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#define SCLP_CMDW_DECONFIGURE_AP 0x001e0001 |
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struct ap_cfg_sccb { |
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struct sccb_header header; |
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} __packed; |
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static int do_ap_configure(sclp_cmdw_t cmd, u32 apid) |
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{ |
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struct ap_cfg_sccb *sccb; |
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int rc; |
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if (!SCLP_HAS_AP_RECONFIG) |
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return -EOPNOTSUPP; |
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sccb = (struct ap_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
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if (!sccb) |
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return -ENOMEM; |
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sccb->header.length = PAGE_SIZE; |
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cmd |= (apid & 0xFF) << 8; |
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rc = sclp_sync_request(cmd, sccb); |
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if (rc) |
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goto out; |
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switch (sccb->header.response_code) { |
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case 0x0020: case 0x0120: case 0x0440: case 0x0450: |
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break; |
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default: |
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pr_warn("configure AP adapter %u failed: cmd=0x%08x response=0x%04x\n", |
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apid, cmd, sccb->header.response_code); |
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rc = -EIO; |
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break; |
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} |
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out: |
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free_page((unsigned long) sccb); |
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return rc; |
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} |
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int sclp_ap_configure(u32 apid) |
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{ |
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return do_ap_configure(SCLP_CMDW_CONFIGURE_AP, apid); |
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} |
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EXPORT_SYMBOL(sclp_ap_configure); |
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int sclp_ap_deconfigure(u32 apid) |
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{ |
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return do_ap_configure(SCLP_CMDW_DECONFIGURE_AP, apid); |
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} |
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EXPORT_SYMBOL(sclp_ap_deconfigure);
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