[S390] ap: toleration support for ap device type 10

Add toleration support for ap devices with device type 10.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 16e4a25596e78a03e53adc88d6170008b1ef3f2a..f8134a44cefaed4b94714bbd18b4f7ecdd2f99a7 100644 (file)
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -6,6 +6,7 @@
  *           Martin Schwidefsky <schwidefsky@de.ibm.com>
  *           Ralph Wuerthner <rwuerthn@de.ibm.com>
  *           Felix Beck <felix.beck@de.ibm.com>
+ *           Holger Dengler <hd@linux.vnet.ibm.com>
  *
  * Adjunct processor bus.
  *
@@ -222,47 +223,52 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind)
 }
 #endif
 
-static inline struct ap_queue_status __ap_4096_commands_available(ap_qid_t qid,
-                                                                 int *support)
+#ifdef CONFIG_64BIT
+static inline struct ap_queue_status
+__ap_query_functions(ap_qid_t qid, unsigned int *functions)
 {
        register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23);
-       register struct ap_queue_status reg1 asm ("1");
-       register unsigned long reg2 asm ("2") = 0UL;
+       register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID;
+       register unsigned long reg2 asm ("2");
 
        asm volatile(
                ".long 0xb2af0000\n"
-               "0: la    %1,0\n"
-               "1:\n"
-               EX_TABLE(0b, 1b)
-               : "+d" (reg0), "=d" (reg1), "=d" (reg2)
+               "0:\n"
+               EX_TABLE(0b, 0b)
+               : "+d" (reg0), "+d" (reg1), "=d" (reg2)
                :
                : "cc");
 
-       if (reg2 & 0x6000000000000000ULL)
-               *support = 1;
-       else
-               *support = 0;
-
+       *functions = (unsigned int)(reg2 >> 32);
        return reg1;
 }
+#endif
 
 /**
- * ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
- * support.
+ * ap_query_functions(): Query supported functions.
  * @qid: The AP queue number
+ * @functions: Pointer to functions field.
  *
- * Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
+ * Returns
+ *   0      on success.
+ *   -ENODEV  if queue not valid.
+ *   -EBUSY   if device busy.
+ *   -EINVAL  if query function is not supported
  */
-int ap_4096_commands_available(ap_qid_t qid)
+static int ap_query_functions(ap_qid_t qid, unsigned int *functions)
 {
+#ifdef CONFIG_64BIT
        struct ap_queue_status status;
-       int i, support = 0;
-       status = __ap_4096_commands_available(qid, &support);
+       int i;
+       status = __ap_query_functions(qid, functions);
 
        for (i = 0; i < AP_MAX_RESET; i++) {
+               if (ap_queue_status_invalid_test(&status))
+                       return -ENODEV;
+
                switch (status.response_code) {
                case AP_RESPONSE_NORMAL:
-                       return support;
+                       return 0;
                case AP_RESPONSE_RESET_IN_PROGRESS:
                case AP_RESPONSE_BUSY:
                        break;
@@ -270,7 +276,7 @@ int ap_4096_commands_available(ap_qid_t qid)
                case AP_RESPONSE_DECONFIGURED:
                case AP_RESPONSE_CHECKSTOPPED:
                case AP_RESPONSE_INVALID_ADDRESS:
-                       return 0;
+                       return -ENODEV;
                case AP_RESPONSE_OTHERWISE_CHANGED:
                        break;
                default:
@@ -278,10 +284,31 @@ int ap_4096_commands_available(ap_qid_t qid)
                }
                if (i < AP_MAX_RESET - 1) {
                        udelay(5);
-                       status = __ap_4096_commands_available(qid, &support);
+                       status = __ap_query_functions(qid, functions);
                }
        }
-       return support;
+       return -EBUSY;
+#else
+       return -EINVAL;
+#endif
+}
+
+/**
+ * ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
+ * support.
+ * @qid: The AP queue number
+ *
+ * Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
+ */
+int ap_4096_commands_available(ap_qid_t qid)
+{
+       unsigned int functions;
+
+       if (ap_query_functions(qid, &functions))
+               return 0;
+
+       return test_ap_facility(functions, 1) &&
+              test_ap_facility(functions, 2);
 }
 EXPORT_SYMBOL(ap_4096_commands_available);
 
@@ -1135,6 +1162,7 @@ static void ap_scan_bus(struct work_struct *unused)
        struct device *dev;
        ap_qid_t qid;
        int queue_depth, device_type;
+       unsigned int device_functions;
        int rc, i;
 
        if (ap_select_domain() != 0)
@@ -1183,14 +1211,30 @@ static void ap_scan_bus(struct work_struct *unused)
                INIT_LIST_HEAD(&ap_dev->list);
                setup_timer(&ap_dev->timeout, ap_request_timeout,
                            (unsigned long) ap_dev);
-               if (device_type == 0) {
+               switch (device_type) {
+               case 0:
                        if (ap_probe_device_type(ap_dev)) {
                                kfree(ap_dev);
                                continue;
                        }
-               }
-               else
+                       break;
+               case 10:
+                       if (ap_query_functions(qid, &device_functions)) {
+                               kfree(ap_dev);
+                               continue;
+                       }
+                       if (test_ap_facility(device_functions, 3))
+                               ap_dev->device_type = AP_DEVICE_TYPE_CEX3C;
+                       else if (test_ap_facility(device_functions, 4))
+                               ap_dev->device_type = AP_DEVICE_TYPE_CEX3A;
+                       else {
+                               kfree(ap_dev);
+                               continue;
+                       }
+                       break;
+               default:
                        ap_dev->device_type = device_type;
+               }
 
                ap_dev->device.bus = &ap_bus_type;
                ap_dev->device.parent = ap_root_device;

diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 08b9738285b4bccae15e182a3dae23ea7dd79e84..d960a6309eecb375aef76de97c1dd1860375ec2b 100644 (file)
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -6,6 +6,7 @@
  *           Martin Schwidefsky <schwidefsky@de.ibm.com>
  *           Ralph Wuerthner <rwuerthn@de.ibm.com>
  *           Felix Beck <felix.beck@de.ibm.com>
+ *           Holger Dengler <hd@linux.vnet.ibm.com>
  *
  * Adjunct processor bus header file.
  *
@@ -72,7 +73,26 @@ struct ap_queue_status {
        unsigned int int_enabled        : 1;
        unsigned int response_code      : 8;
        unsigned int pad2               : 16;
-};
+} __packed;
+
+#define AP_QUEUE_STATUS_INVALID \
+               { 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
+
+static inline
+int ap_queue_status_invalid_test(struct ap_queue_status *status)
+{
+       struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
+       return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
+}
+
+#define MAX_AP_FACILITY 31
+
+static inline int test_ap_facility(unsigned int function, unsigned int nr)
+{
+       if (nr > MAX_AP_FACILITY)
+               return 0;
+       return function & (unsigned int)(0x80000000 >> nr);
+}
 
 #define AP_RESPONSE_NORMAL             0x00
 #define AP_RESPONSE_Q_NOT_AVAIL                0x01