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s390/pci: CLP interface

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CLP instructions are used to query the firmware about detected PCI
functions, the attributes of those functions and to enable or disable
a PCI function. The CLP interface is the equivalent to a PCI bus scan.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber
2012-11-29 12:55:21 +01:00
committed by Martin Schwidefsky
parent cd24834130
commit a755a45dd9
6 changed files with 563 additions and 1 deletions
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28
arch/s390/include/asm/clp.h Normal file
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#ifndef _ASM_S390_CLP_H
#define _ASM_S390_CLP_H
/* CLP common request & response block size */
#define CLP_BLK_SIZE (PAGE_SIZE * 2)
struct clp_req_hdr {
u16 len;
u16 cmd;
} __packed;
struct clp_rsp_hdr {
u16 len;
u16 rsp;
} __packed;
/* CLP Response Codes */
#define CLP_RC_OK 0x0010 /* Command request successfully */
#define CLP_RC_CMD 0x0020 /* Command code not recognized */
#define CLP_RC_PERM 0x0030 /* Command not authorized */
#define CLP_RC_FMT 0x0040 /* Invalid command request format */
#define CLP_RC_LEN 0x0050 /* Invalid command request length */
#define CLP_RC_8K 0x0060 /* Command requires 8K LPCB */
#define CLP_RC_RESNOT0 0x0070 /* Reserved field not zero */
#define CLP_RC_NODATA 0x0080 /* No data available */
#define CLP_RC_FC_UNKNOWN 0x0100 /* Function code not recognized */
#endif