[S390] cio: Channel-path configure function.

Add a new attribute to the channel-path sysfs directory through which
channel-path configure operations can be triggered. Also listen for
hardware events requesting channel-path configure operations and
process them accordingly.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 43 insertions, 1 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index d99f525eac08..3dec460bba27 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -15,12 +15,12 @@
 #include <linux/device.h>
 
 #include <asm/cio.h>
+#include <asm/chpid.h>
 
 #include "css.h"
 #include "cio.h"
 #include "cio_debug.h"
 #include "ioasm.h"
-#include "chpid.h"
 #include "chp.h"
 #include "chsc.h"
 
@@ -498,6 +498,45 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
         return rc;
 }
 
+struct chp_config_data {
+        u8 map[32];
+        u8 op;
+        u8 pc;
+};
+
+static int chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
+{
+        struct chp_config_data *data;
+        struct chp_id chpid;
+        int num;
+
+        CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
+        if (sei_area->rs != 0)
+                return 0;
+        data = (struct chp_config_data *) &(sei_area->ccdf);
+        chp_id_init(&chpid);
+        for (num = 0; num <= __MAX_CHPID; num++) {
+                if (!chp_test_bit(data->map, num))
+                        continue;
+                chpid.id = num;
+                printk(KERN_WARNING "cio: processing configure event %d for "
+                       "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
+                switch (data->op) {
+                case 0:
+                        chp_cfg_schedule(chpid, 1);
+                        break;
+                case 1:
+                        chp_cfg_schedule(chpid, 0);
+                        break;
+                case 2:
+                        chp_cfg_cancel_deconfigure(chpid);
+                        break;
+                }
+        }
+
+        return 0;
+}
+
 static int chsc_process_sei(struct chsc_sei_area *sei_area)
 {
         int rc;
@@ -514,6 +553,9 @@ static int chsc_process_sei(struct chsc_sei_area *sei_area)
         case 2: /* i/o resource accessibiliy */
                 rc = chsc_process_sei_res_acc(sei_area);
                 break;
+        case 8: /* channel-path-configuration notification */
+                rc = chsc_process_sei_chp_config(sei_area);
+                break;
         default: /* other stuff */
                 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
                               sei_area->cc);