[S390] cio: Cleanup crw interface.

[linux-2.6-omap-h63xx.git] / drivers / s390 / cio / chp.c

diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index 297f1653b52bda7bef808174044b32a3e68f5076..672d9731c52527f84b13868ca48e26f6a817b8b8 100644 (file)
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -18,6 +18,7 @@
 #include <asm/chpid.h>
 #include <asm/sclp.h>
 
+#include "../s390mach.h"
 #include "cio.h"
 #include "css.h"
 #include "ioasm.h"
@@ -476,24 +477,52 @@ void *chp_get_chp_desc(struct chp_id chpid)
 
 /**
  * chp_process_crw - process channel-path status change
- * @id: channel-path ID number
- * @status: non-zero if channel-path has become available, zero otherwise
+ * @crw0: channel report-word to handler
+ * @crw1: second channel-report word (always NULL)
+ * @overflow: crw overflow indication
  *
  * Handle channel-report-words indicating that the status of a channel-path
  * has changed.
  */
-void chp_process_crw(int id, int status)
+static void chp_process_crw(struct crw *crw0, struct crw *crw1,
+                           int overflow)
 {
        struct chp_id chpid;
 
+       if (overflow) {
+               css_schedule_eval_all();
+               return;
+       }
+       CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
+                     "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
+                     crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
+                     crw0->erc, crw0->rsid);
+       /*
+        * Check for solicited machine checks. These are
+        * created by reset channel path and need not be
+        * handled here.
+        */
+       if (crw0->slct) {
+               CIO_CRW_EVENT(2, "solicited machine check for "
+                             "channel path %02X\n", crw0->rsid);
+               return;
+       }
        chp_id_init(&chpid);
-       chpid.id = id;
-       if (status) {
+       chpid.id = crw0->rsid;
+       switch (crw0->erc) {
+       case CRW_ERC_IPARM: /* Path has come. */
                if (!chp_is_registered(chpid))
                        chp_new(chpid);
                chsc_chp_online(chpid);
-       } else
+               break;
+       case CRW_ERC_PERRI: /* Path has gone. */
+       case CRW_ERC_PERRN:
                chsc_chp_offline(chpid);
+               break;
+       default:
+               CIO_CRW_EVENT(2, "Don't know how to handle erc=%x\n",
+                             crw0->erc);
+       }
 }
 
 int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct res_acc_data *data)
@@ -674,10 +703,16 @@ static int cfg_wait_idle(void)
 static int __init chp_init(void)
 {
        struct chp_id chpid;
+       int ret;
 
+       ret = s390_register_crw_handler(CRW_RSC_CPATH, chp_process_crw);
+       if (ret)
+               return ret;
        chp_wq = create_singlethread_workqueue("cio_chp");
-       if (!chp_wq)
+       if (!chp_wq) {
+               s390_unregister_crw_handler(CRW_RSC_CPATH);
                return -ENOMEM;
+       }
        INIT_WORK(&cfg_work, cfg_func);
        init_waitqueue_head(&cfg_wait_queue);
        if (info_update())