IB/ipath: Changes for fields moving from devdata to portdata

This patch moves some arrays that were defined per-device to be
variables defined in the per context data structure, thus avoiding extra
kzalloc() calls.
Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/ipath_file_ops.c

@@ -1785,6 +1785,7 @@ static int find_shared_port(struct file *fp,
 			}
 			port_fp(fp) = pd;
 			subport_fp(fp) = pd->port_cnt++;
+			pd->port_subpid[subport_fp(fp)] = current->pid;
 			tidcursor_fp(fp) = 0;
 			pd->active_slaves |= 1 << subport_fp(fp);
 			ipath_cdbg(PROC,
@@ -1915,8 +1916,7 @@ static int ipath_do_user_init(struct file *fp,
 	 */
 	head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
 	ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
-	dd->ipath_lastegrheads[pd->port_port] = -1;
-	dd->ipath_lastrcvhdrqtails[pd->port_port] = -1;
+	pd->port_lastrcvhdrqtail = -1;
 	ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n",
 		pd->port_port, head32);
 	pd->port_tidcursor = 0;	/* start at beginning after open */
@@ -2019,6 +2019,7 @@ static int ipath_close(struct inode *in, struct file *fp)
 		 * the slave(s) don't wait for receive data forever.
 		 */
 		pd->active_slaves &= ~(1 << fd->subport);
+		pd->port_subpid[fd->subport] = 0;
 		mutex_unlock(&ipath_mutex);
 		goto bail;
 	}

drivers/infiniband/hw/ipath/ipath_init_chip.c

@@ -272,22 +272,7 @@ static int init_chip_first(struct ipath_devdata *dd,
 		goto done;
 	}
 
-	dd->ipath_lastegrheads = kzalloc(sizeof(*dd->ipath_lastegrheads)
-					 * dd->ipath_cfgports,
-					 GFP_KERNEL);
-	dd->ipath_lastrcvhdrqtails =
-		kzalloc(sizeof(*dd->ipath_lastrcvhdrqtails)
-			* dd->ipath_cfgports, GFP_KERNEL);
-
-	if (!dd->ipath_lastegrheads || !dd->ipath_lastrcvhdrqtails) {
-		ipath_dev_err(dd, "Unable to allocate head arrays, "
-			      "failing\n");
-		ret = -ENOMEM;
-		goto done;
-	}
-
 	pd = create_portdata0(dd);
-
 	if (!pd) {
 		ipath_dev_err(dd, "Unable to allocate portdata for port "
 			      "0, failing\n");

drivers/infiniband/hw/ipath/ipath_intr.c

@@ -693,7 +693,7 @@ static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
 				 * except kernel
 				 */
 				tl = *(u64 *) pd->port_rcvhdrtail_kvaddr;
-				if (tl == dd->ipath_lastrcvhdrqtails[i])
+				if (tl == pd->port_lastrcvhdrqtail)
 					continue;
 				hd = ipath_read_ureg32(dd, ur_rcvhdrhead,
 						       i);
@@ -703,7 +703,7 @@ static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
 			    (!hd && tl == dd->ipath_hdrqlast)) {
 				if (i == 0)
 					chkerrpkts = 1;
-				dd->ipath_lastrcvhdrqtails[i] = tl;
+				pd->port_lastrcvhdrqtail = tl;
 				pd->port_hdrqfull++;
 				/* flush hdrqfull so that poll() sees it */
 				wmb();

drivers/infiniband/hw/ipath/ipath_kernel.h

@@ -141,6 +141,11 @@ struct ipath_portdata {
 	u32 port_pionowait;
 	/* total number of rcvhdrqfull errors */
 	u32 port_hdrqfull;
+	/*
+	 * Used to suppress multiple instances of same
+	 * port staying stuck at same point.
+	 */
+	u32 port_lastrcvhdrqtail;
 	/* saved total number of rcvhdrqfull errors for poll edge trigger */
 	u32 port_hdrqfull_poll;
 	/* total number of polled urgent packets */
@@ -149,6 +154,7 @@ struct ipath_portdata {
 	u32 port_urgent_poll;
 	/* pid of process using this port */
 	pid_t port_pid;
+	pid_t port_subpid[INFINIPATH_MAX_SUBPORT];
 	/* same size as task_struct .comm[] */
 	char port_comm[16];
 	/* pkeys set by this use of this port */
@@ -319,16 +325,6 @@ struct ipath_devdata {
 	/* count of port 0 hdrqfull errors */
 	u32 ipath_p0_hdrqfull;
 
-	/*
-	 * (*cfgports) used to suppress multiple instances of same
-	 * port staying stuck at same point
-	 */
-	u32 *ipath_lastrcvhdrqtails;
-	/*
-	 * (*cfgports) used to suppress multiple instances of same
-	 * port staying stuck at same point
-	 */
-	u32 *ipath_lastegrheads;
 	/*
 	 * index of last piobuffer we used.  Speeds up searching, by
 	 * starting at this point.  Doesn't matter if multiple cpu's use and

drivers/infiniband/hw/ipath/ipath_stats.c

@@ -238,7 +238,7 @@ static void ipath_chk_errormask(struct ipath_devdata *dd)
 void ipath_get_faststats(unsigned long opaque)
 {
 	struct ipath_devdata *dd = (struct ipath_devdata *) opaque;
-	u32 val;
+	int i;
 	static unsigned cnt;
 	unsigned long flags;
 	u64 traffic_wds;
@@ -322,12 +322,11 @@ void ipath_get_faststats(unsigned long opaque)
 
 	/* limit qfull messages to ~one per minute per port */
 	if ((++cnt & 0x10)) {
-		for (val = dd->ipath_cfgports - 1; ((int)val) >= 0;
-		     val--) {
-			if (dd->ipath_lastegrheads[val] != -1)
-				dd->ipath_lastegrheads[val] = -1;
-			if (dd->ipath_lastrcvhdrqtails[val] != -1)
-				dd->ipath_lastrcvhdrqtails[val] = -1;
+		for (i = (int) dd->ipath_cfgports; --i >= 0; ) {
+			struct ipath_portdata *pd = dd->ipath_pd[i];
+
+			if (pd && pd->port_lastrcvhdrqtail != -1)
+				pd->port_lastrcvhdrqtail = -1;
 		}
 	}