#include <asm/chsc.h>
#include <asm/crw.h>
#include <asm/isc.h>
+#include <asm/ebcdic.h>
#include "css.h"
#include "cio.h"
css_schedule_reprobe();
}
-static int
-__get_chpid_from_lir(void *data)
-{
- struct lir {
- u8 iq;
- u8 ic;
- u16 sci;
- /* incident-node descriptor */
- u32 indesc[28];
- /* attached-node descriptor */
- u32 andesc[28];
- /* incident-specific information */
- u32 isinfo[28];
- } __attribute__ ((packed)) *lir;
-
- lir = data;
- if (!(lir->iq&0x80))
- /* NULL link incident record */
- return -EINVAL;
- if (!(lir->indesc[0]&0xc0000000))
- /* node descriptor not valid */
- return -EINVAL;
- if (!(lir->indesc[0]&0x10000000))
- /* don't handle device-type nodes - FIXME */
- return -EINVAL;
- /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
-
- return (u16) (lir->indesc[0]&0x000000ff);
-}
-
struct chsc_sei_nt0_area {
u8 flags;
u8 vf; /* validity flags */
} u;
} __packed;
+/*
+ * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
+ */
+
+#define ND_VALIDITY_VALID 0
+#define ND_VALIDITY_OUTDATED 1
+#define ND_VALIDITY_INVALID 2
+
+struct node_descriptor {
+ /* Flags. */
+ union {
+ struct {
+ u32 validity:3;
+ u32 reserved:5;
+ } __packed;
+ u8 byte0;
+ } __packed;
+
+ /* Node parameters. */
+ u32 params:24;
+
+ /* Node ID. */
+ char type[6];
+ char model[3];
+ char manufacturer[3];
+ char plant[2];
+ char seq[12];
+ u16 tag;
+} __packed;
+
+/*
+ * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
+ */
+
+#define LIR_IQ_CLASS_INFO 0
+#define LIR_IQ_CLASS_DEGRADED 1
+#define LIR_IQ_CLASS_NOT_OPERATIONAL 2
+
+struct lir {
+ struct {
+ u32 null:1;
+ u32 reserved:3;
+ u32 class:2;
+ u32 reserved2:2;
+ } __packed iq;
+ u32 ic:8;
+ u32 reserved:16;
+ struct node_descriptor incident_node;
+ struct node_descriptor attached_node;
+ u8 reserved2[32];
+} __packed;
+
+#define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
+#define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
+
+/* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
+static char *store_ebcdic(char *dest, const char *src, unsigned long len,
+ char delim)
+{
+ memcpy(dest, src, len);
+ EBCASC(dest, len);
+
+ if (delim)
+ dest[len++] = delim;
+
+ return dest + len;
+}
+
+/* Format node ID and parameters for output in LIR log message. */
+static void format_node_data(char *params, char *id, struct node_descriptor *nd)
+{
+ memset(params, 0, PARAMS_LEN);
+ memset(id, 0, NODEID_LEN);
+
+ if (nd->validity != ND_VALIDITY_VALID) {
+ strncpy(params, "n/a", PARAMS_LEN - 1);
+ strncpy(id, "n/a", NODEID_LEN - 1);
+ return;
+ }
+
+ /* PARAMS=xx,xxxxxx */
+ snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
+ /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
+ id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
+ id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
+ id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
+ id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
+ id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
+ sprintf(id, "%04X", nd->tag);
+}
+
static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
{
- struct chp_id chpid;
- int id;
+ struct lir *lir = (struct lir *) &sei_area->ccdf;
+ char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
+ aunodeid[NODEID_LEN];
- CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
- sei_area->rs, sei_area->rsid);
- if (sei_area->rs != 4)
+ CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
+ sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
+
+ /* Ignore NULL Link Incident Records. */
+ if (lir->iq.null)
return;
- id = __get_chpid_from_lir(sei_area->ccdf);
- if (id < 0)
- CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
- else {
- chp_id_init(&chpid);
- chpid.id = id;
- chsc_chp_offline(chpid);
+
+ /* Inform user that a link requires maintenance actions because it has
+ * become degraded or not operational. Note that this log message is
+ * the primary intention behind a Link Incident Record. */
+
+ format_node_data(iuparams, iunodeid, &lir->incident_node);
+ format_node_data(auparams, aunodeid, &lir->attached_node);
+
+ switch (lir->iq.class) {
+ case LIR_IQ_CLASS_DEGRADED:
+ pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
+ "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
+ sei_area->rs, sei_area->rsid, lir->ic, iuparams,
+ iunodeid, auparams, aunodeid);
+ break;
+ case LIR_IQ_CLASS_NOT_OPERATIONAL:
+ pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
+ "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
+ sei_area->rs, sei_area->rsid, lir->ic, iuparams,
+ iunodeid, auparams, aunodeid);
+ break;
+ default:
+ break;
}
}
free_page((unsigned long)sei_page);
}
-int chsc_enable_facility(int operation_code)
+int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
{
- unsigned long flags;
int ret;
- struct {
- struct chsc_header request;
- u8 reserved1:4;
- u8 format:4;
- u8 reserved2;
- u16 operation_code;
- u32 reserved3;
- u32 reserved4;
- u32 operation_data_area[252];
- struct chsc_header response;
- u32 reserved5:4;
- u32 format2:4;
- u32 reserved6:24;
- } __attribute__ ((packed)) *sda_area;
- spin_lock_irqsave(&chsc_page_lock, flags);
- memset(chsc_page, 0, PAGE_SIZE);
- sda_area = chsc_page;
sda_area->request.length = 0x0400;
sda_area->request.code = 0x0031;
sda_area->operation_code = operation_code;
default:
ret = chsc_error_from_response(sda_area->response.code);
}
+out:
+ return ret;
+}
+
+int chsc_enable_facility(int operation_code)
+{
+ struct chsc_sda_area *sda_area;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&chsc_page_lock, flags);
+ memset(chsc_page, 0, PAGE_SIZE);
+ sda_area = chsc_page;
+
+ ret = __chsc_enable_facility(sda_area, operation_code);
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
operation_code, sda_area->response.code);
-out:
+
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
Code Review / kvmfornfv.git / blobdiff