Add support for the HP Modular Smart Array 20 & 500 storage arrays.

Logical volumes on these devices show up as LUNs behind another
controller (also known as proxy controller).  In order to issue
firmware commands for a volume on a proxy controller, they must be
targeted at the address of the proxy controller it is attached to,
not the Host/PCI controller.

A proxy controller is defined as a device listed in the INQUIRY
PHYSICAL LUNS command who's L2 and L3 SCSI addresses are zero.  The
corresponding address returned defines which "bus" the controller
lives on and we use this to create a virtual CAM bus.

A logical volume's addresses first byte defines the logical drive
number.  The second byte defines the bus that it is attached to
which corresponds to the BUS of the proxy controller's found or the
Host/PCI controller.

Change event notification to be handled in its own kernel thread.
This is needed since some events may require the driver to sleep
on some operations and this cannot be done during interrupt context.
With this change, it is now possible to create and destroy logical
volumes from FreeBSD, but it requires a native application to
construct the proper firmware commands which is not publicly
available.

Special thanks to John Cagle @ HP for providing remote access to
all the hardware and beating on the storage engineers at HP to
answer my questions.

1 files changed, 18 insertions, 14 deletions

diff --git a/sys/dev/ciss/cissvar.h b/sys/dev/ciss/cissvar.h
index 6274b9d..717351f 100644
--- a/sys/dev/ciss/cissvar.h
+++ b/sys/dev/ciss/cissvar.h
@@ -47,6 +47,11 @@
 #define CISS_MAX_LOGICAL	15
 
 /*
+ * Maximum number of physical devices we support.
+ */
+#define CISS_MAX_PHYSICAL	1024
+
+/*
  * Interrupt reduction can be controlled by tuning the interrupt
  * coalesce delay and count paramters.  The delay (in microseconds)
  * defers delivery of interrupts to increase the chance of there being
@@ -66,11 +71,6 @@
  */
 #define CISS_HEARTBEAT_RATE		10
 
-/*
- * Maximum number of events we will queue for a monitoring utility.
- */
-#define CISS_MAX_EVENTS		32
-
 /************************************************************************
  * Compatibility with older versions of FreeBSD
  */
@@ -86,7 +86,8 @@ typedef struct proc	d_thread_t;
 #define CISSQ_FREE	0
 #define CISSQ_BUSY	1
 #define CISSQ_COMPLETE	2
-#define CISSQ_COUNT	3
+#define CISSQ_NOTIFY	3
+#define CISSQ_COUNT	4
 
 struct ciss_qstat
 {
@@ -150,12 +151,14 @@ struct ciss_request
 struct ciss_ldrive
 {
     union ciss_device_address	cl_address;
-
+    union ciss_device_address	*cl_controller;
     int				cl_status;
 #define CISS_LD_NONEXISTENT	0
 #define CISS_LD_ONLINE		1
 #define CISS_LD_OFFLINE		2
 
+    int				cl_update;
+
     struct ciss_bmic_id_ldrive	*cl_ldrive;
     struct ciss_bmic_id_lstatus	*cl_lstatus;
     struct ciss_ldrive_geometry	cl_geometry;
@@ -202,19 +205,18 @@ struct ciss_softc
     TAILQ_HEAD(,ciss_request)	ciss_free;		/* requests available for reuse */
     TAILQ_HEAD(,ciss_request)	ciss_busy;		/* requests in the adapter */
     TAILQ_HEAD(,ciss_request)	ciss_complete;		/* requests which have been returned by the adapter */
+    TAILQ_HEAD(,ciss_request)	ciss_notify;		/* requests which are defered for processing */
+    struct proc			*ciss_notify_thread;
 
     struct callout_handle	ciss_periodic;		/* periodic event handling */
     struct ciss_request		*ciss_periodic_notify;	/* notify callback request */
 
-    struct ciss_notify		ciss_notify[CISS_MAX_EVENTS];
-    int				ciss_notify_head;	/* saved-event ringbuffer */
-    int				ciss_notify_tail;
-
-    struct ciss_ldrive		ciss_logical[CISS_MAX_LOGICAL];
+    struct ciss_ldrive		**ciss_logical;
+    union ciss_device_address	*ciss_controllers;	/* controller address */
+    int				ciss_max_bus_number;	/* maximum bus number */
 
     struct cam_devq		*ciss_cam_devq;
-    struct cam_sim		*ciss_cam_sim;
-    struct cam_path		*ciss_cam_path;
+    struct cam_sim		**ciss_cam_sim;
 
     int				ciss_flags;
 #define CISS_FLAG_NOTIFY_OK	(1<<0)		/* notify command running OK */
@@ -224,6 +226,7 @@ struct ciss_softc
 
 #define CISS_FLAG_FAKE_SYNCH	(1<<16)		/* needs SYNCHRONISE_CACHE faked */
 #define CISS_FLAG_BMIC_ABORT	(1<<17)		/* use BMIC command to abort Notify on Event */
+#define CISS_FLAG_THREAD_SHUT	(1<<20)		/* shutdown the kthread */
 
     struct ciss_qstat		ciss_qstat[CISSQ_COUNT];	/* queue statistics */
 };
@@ -367,6 +370,7 @@ struct hack
 CISSQ_REQUEST_QUEUE(free, CISSQ_FREE);
 CISSQ_REQUEST_QUEUE(busy, CISSQ_BUSY);
 CISSQ_REQUEST_QUEUE(complete, CISSQ_COMPLETE);
+CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY);
 
 /********************************************************************************
  * space-fill a character string