[SCSI] fusion - mptctl -adding asyn event notification support

Adding aen support.

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 80 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 2e5377309cea..723d54300953 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -616,6 +616,7 @@ typedef struct _MPT_ADAPTER
          * increments by 32 bytes
          */
         int                      errata_flag_1064;
+        int                      aen_event_read_flag; /* flag to indicate event log was read*/
         u8                       FirstWhoInit;
         u8                       upload_fw;     /* If set, do a fw upload */
         u8                       reload_fw;     /* Force a FW Reload on next reset */
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index fe10cc0fe18e..9b64e07400da 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -136,6 +136,12 @@ static void mptctl_free_tm_flags(MPT_ADAPTER *ioc);
  */
 static int  mptctl_ioc_reset(MPT_ADAPTER *ioc, int reset_phase);
 
+/*
+ * Event Handler function
+ */
+static int mptctl_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply);
+struct fasync_struct *async_queue=NULL;
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  * Scatter gather list (SGL) sizes and limits...
@@ -472,6 +478,69 @@ mptctl_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
 }
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/* ASYNC Event Notification Support */
+static int
+mptctl_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply)
+{
+        u8 event;
+
+        event = le32_to_cpu(pEvReply->Event) & 0xFF;
+
+        dctlprintk(("%s() called\n", __FUNCTION__));
+        if(async_queue == NULL)
+                return 1;
+
+        /* Raise SIGIO for persistent events.
+         * TODO - this define is not in MPI spec yet,
+         * but they plan to set it to 0x21
+         */
+         if (event == 0x21 ) {
+                ioc->aen_event_read_flag=1;
+                dctlprintk(("Raised SIGIO to application\n"));
+                devtprintk(("Raised SIGIO to application\n"));
+                kill_fasync(&async_queue, SIGIO, POLL_IN);
+                return 1;
+         }
+
+        /* This flag is set after SIGIO was raised, and
+         * remains set until the application has read
+         * the event log via ioctl=MPTEVENTREPORT
+         */
+        if(ioc->aen_event_read_flag)
+                return 1;
+
+        /* Signal only for the events that are
+         * requested for by the application
+         */
+        if (ioc->events && (ioc->eventTypes & ( 1 << event))) {
+                ioc->aen_event_read_flag=1;
+                dctlprintk(("Raised SIGIO to application\n"));
+                devtprintk(("Raised SIGIO to application\n"));
+                kill_fasync(&async_queue, SIGIO, POLL_IN);
+        }
+        return 1;
+}
+
+static int
+mptctl_fasync(int fd, struct file *filep, int mode)
+{
+        MPT_ADAPTER     *ioc;
+
+        list_for_each_entry(ioc, &ioc_list, list)
+                ioc->aen_event_read_flag=0;
+
+        dctlprintk(("%s() called\n", __FUNCTION__));
+        return fasync_helper(fd, filep, mode, &async_queue);
+}
+
+static int
+mptctl_release(struct inode *inode, struct file *filep)
+{
+        dctlprintk(("%s() called\n", __FUNCTION__));
+        return fasync_helper(-1, filep, 0, &async_queue);
+}
+
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  *  MPT ioctl handler
  *  cmd - specify the particular IOCTL command to be issued
@@ -1603,6 +1672,9 @@ mptctl_eventreport (unsigned long arg)
         if ((max < 1) || !ioc->events)
                 return -ENODATA;
 
+        /* reset this flag so SIGIO can restart */
+        ioc->aen_event_read_flag=0;
+
         /* Copy the data from kernel memory to user memory
          */
         numBytes = max * sizeof(MPT_IOCTL_EVENTS);
@@ -2649,6 +2721,8 @@ mptctl_hp_targetinfo(unsigned long arg)
 static struct file_operations mptctl_fops = {
         .owner =        THIS_MODULE,
         .llseek =       no_llseek,
+        .release =      mptctl_release,
+        .fasync =       mptctl_fasync,
         .unlocked_ioctl = mptctl_ioctl,
 #ifdef CONFIG_COMPAT
         .compat_ioctl = compat_mpctl_ioctl,
@@ -2893,6 +2967,11 @@ static int __init mptctl_init(void)
                 /* FIXME! */
         }
 
+        if (mpt_event_register(mptctl_id, mptctl_event_process) == 0) {
+                devtprintk((KERN_INFO MYNAM
+                  ": Registered for IOC event notifications\n"));
+        }
+
         return 0;
 
 out_fail: