s390/pci: CLP interface

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>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/s390/include/asm/clp.h b/arch/s390/include/asm/clp.h
new file mode 100644
index 000000000000..6c3aecc245ff
--- /dev/null
+++ b/arch/s390/include/asm/clp.h
@@ -0,0 +1,28 @@
+#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