6 files changed, 46 insertions, 26 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c
index 5a5fbdf..7c69090 100644
--- a/drivers/infiniband/hw/ipath/ipath_driver.c
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c
@@ -1104,13 +1104,14 @@ static void ipath_rcv_hdrerr(struct ipath_devdata *dd,
 
 /*
  * ipath_kreceive - receive a packet
- * @dd: the infinipath device
+ * @pd: the infinipath port
  *
  * called from interrupt handler for errors or receive interrupt
  */
-void ipath_kreceive(struct ipath_devdata *dd)
+void ipath_kreceive(struct ipath_portdata *pd)
 {
 	u64 *rc;
+	struct ipath_devdata *dd = pd->port_dd;
 	void *ebuf;
 	const u32 rsize = dd->ipath_rcvhdrentsize;	/* words */
 	const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize;	/* words */
@@ -1125,8 +1126,8 @@ void ipath_kreceive(struct ipath_devdata *dd)
 		goto bail;
 	}
 
-	l = dd->ipath_port0head;
-	hdrqtail = (u32) le64_to_cpu(*dd->ipath_hdrqtailptr);
+	l = pd->port_head;
+	hdrqtail = ipath_get_rcvhdrtail(pd);
 	if (l == hdrqtail)
 		goto bail;
 
@@ -1135,7 +1136,7 @@ reloop:
 		u32 qp;
 		u8 *bthbytes;
 
-		rc = (u64 *) (dd->ipath_pd[0]->port_rcvhdrq + (l << 2));
+		rc = (u64 *) (pd->port_rcvhdrq + (l << 2));
 		hdr = (struct ipath_message_header *)&rc[1];
 		/*
 		 * could make a network order version of IPATH_KD_QP, and
@@ -1245,7 +1246,7 @@ reloop:
 		 * earlier packets, we "almost" guarantee we have covered
 		 * that case.
 		 */
-		u32 hqtail = (u32)le64_to_cpu(*dd->ipath_hdrqtailptr);
+		u32 hqtail = ipath_get_rcvhdrtail(pd);
 		if (hqtail != hdrqtail) {
 			hdrqtail = hqtail;
 			reloop = 1; /* loop 1 extra time at most */
@@ -1255,7 +1256,7 @@ reloop:
 
 	pkttot += i;
 
-	dd->ipath_port0head = l;
+	pd->port_head = l;
 
 	if (pkttot > ipath_stats.sps_maxpkts_call)
 		ipath_stats.sps_maxpkts_call = pkttot;
@@ -1605,7 +1606,8 @@ int ipath_create_rcvhdrq(struct ipath_devdata *dd,
 
 	/* clear for security and sanity on each use */
 	memset(pd->port_rcvhdrq, 0, pd->port_rcvhdrq_size);
-	memset(pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE);
+	if (pd->port_rcvhdrtail_kvaddr)
+		memset(pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE);
 
 	/*
 	 * tell chip each time we init it, even if we are re-using previous
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index e7fbb31..4277014 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -742,7 +742,8 @@ static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport,
 		 * updated and correct itself, even in the face of software
 		 * bugs.
 		 */
-		*(volatile u64 *)pd->port_rcvhdrtail_kvaddr = 0;
+		if (pd->port_rcvhdrtail_kvaddr)
+			ipath_clear_rcvhdrtail(pd);
 		set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port,
 			&dd->ipath_rcvctrl);
 	} else
@@ -1391,7 +1392,10 @@ static unsigned int ipath_poll_next(struct ipath_portdata *pd,
 	pollflag = ipath_poll_hdrqfull(pd);
 
 	head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
-	tail = *(volatile u64 *)pd->port_rcvhdrtail_kvaddr;
+	if (pd->port_rcvhdrtail_kvaddr)
+		tail = ipath_get_rcvhdrtail(pd);
+	else
+		tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
 
 	if (head != tail)
 		pollflag |= POLLIN | POLLRDNORM;
@@ -1932,7 +1936,8 @@ static int ipath_do_user_init(struct file *fp,
 	 * We explictly set the in-memory copy to 0 beforehand, so we don't
 	 * have to wait to be sure the DMA update has happened.
 	 */
-	*(volatile u64 *)pd->port_rcvhdrtail_kvaddr = 0ULL;
+	if (pd->port_rcvhdrtail_kvaddr)
+		ipath_clear_rcvhdrtail(pd);
 	set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port,
 		&dd->ipath_rcvctrl);
 	ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c
index 1c65ab9..e161cad 100644
--- a/drivers/infiniband/hw/ipath/ipath_init_chip.c
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c
@@ -526,12 +526,11 @@ static void enable_chip(struct ipath_devdata *dd,
 	 */
 	val = ipath_read_ureg32(dd, ur_rcvegrindextail, 0);
 	(void)ipath_write_ureg(dd, ur_rcvegrindexhead, val, 0);
-	dd->ipath_port0head = ipath_read_ureg32(dd, ur_rcvhdrtail, 0);
 
 	/* Initialize so we interrupt on next packet received */
 	(void)ipath_write_ureg(dd, ur_rcvhdrhead,
 			       dd->ipath_rhdrhead_intr_off |
-			       dd->ipath_port0head, 0);
+			       dd->ipath_pd[0]->port_head, 0);
 
 	/*
 	 * by now pioavail updates to memory should have occurred, so
@@ -693,7 +692,7 @@ done:
  */
 int ipath_init_chip(struct ipath_devdata *dd, int reinit)
 {
-	int ret = 0, i;
+	int ret = 0;
 	u32 val32, kpiobufs;
 	u32 piobufs, uports;
 	u64 val;
@@ -750,7 +749,7 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit)
 		kpiobufs = ipath_kpiobufs;
 
 	if (kpiobufs + (uports * IPATH_MIN_USER_PORT_BUFCNT) > piobufs) {
-		i = (int) piobufs -
+		int i = (int) piobufs -
 			(int) (uports * IPATH_MIN_USER_PORT_BUFCNT);
 		if (i < 0)
 			i = 0;
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c
index 4795cb8..ec18b9b 100644
--- a/drivers/infiniband/hw/ipath/ipath_intr.c
+++ b/drivers/infiniband/hw/ipath/ipath_intr.c
@@ -683,7 +683,7 @@ static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
 		for (i = 0; i < dd->ipath_cfgports; i++) {
 			struct ipath_portdata *pd = dd->ipath_pd[i];
 			if (i == 0) {
-				hd = dd->ipath_port0head;
+				hd = pd->port_head;
 				tl = (u32) le64_to_cpu(
 					*dd->ipath_hdrqtailptr);
 			} else if (pd && pd->port_cnt &&
@@ -712,6 +712,8 @@ static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
 		}
 	}
 	if (errs & INFINIPATH_E_RRCVEGRFULL) {
+		struct ipath_portdata *pd = dd->ipath_pd[0];
+
 		/*
 		 * since this is of less importance and not likely to
 		 * happen without also getting hdrfull, only count
@@ -719,7 +721,7 @@ static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
 		 * vs user)
 		 */
 		ipath_stats.sps_etidfull++;
-		if (dd->ipath_port0head !=
+		if (pd->port_head !=
 		    (u32) le64_to_cpu(*dd->ipath_hdrqtailptr))
 			chkerrpkts = 1;
 	}
@@ -1173,7 +1175,7 @@ irqreturn_t ipath_intr(int irq, void *data)
 	 * for receive are at the bottom.
 	 */
 	if (chk0rcv) {
-		ipath_kreceive(dd);
+		ipath_kreceive(dd->ipath_pd[0]);
 		istat &= ~port0rbits;
 	}
 
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index 81759c20..7225234 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -167,6 +167,8 @@ struct ipath_portdata {
 	u32 active_slaves;
 	/* Type of packets or conditions we want to poll for */
 	u16 poll_type;
+	/* port rcvhdrq head offset */
+	u32 port_head;
 };
 
 struct sk_buff;
@@ -314,8 +316,6 @@ struct ipath_devdata {
 	 * supports, less gives more pio bufs/port, etc.
 	 */
 	u32 ipath_cfgports;
-	/* port0 rcvhdrq head offset */
-	u32 ipath_port0head;
 	/* count of port 0 hdrqfull errors */
 	u32 ipath_p0_hdrqfull;
 
@@ -690,7 +690,7 @@ void ipath_free_pddata(struct ipath_devdata *, struct ipath_portdata *);
 
 int ipath_parse_ushort(const char *str, unsigned short *valp);
 
-void ipath_kreceive(struct ipath_devdata *);
+void ipath_kreceive(struct ipath_portdata *);
 int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned);
 int ipath_reset_device(int);
 void ipath_get_faststats(unsigned long);
@@ -928,6 +928,17 @@ static inline u32 ipath_read_creg32(const struct ipath_devdata *dd,
 		      (char __iomem *)dd->ipath_kregbase));
 }
 
+static inline void ipath_clear_rcvhdrtail(const struct ipath_portdata *pd)
+{
+	*((u64 *) pd->port_rcvhdrtail_kvaddr) = 0ULL;
+}
+
+static inline u32 ipath_get_rcvhdrtail(const struct ipath_portdata *pd)
+{
+	return (u32) le64_to_cpu(*((volatile __le64 *)
+				pd->port_rcvhdrtail_kvaddr));
+}
+
 /*
  * sysfs interface.
  */
diff --git a/drivers/infiniband/hw/ipath/ipath_stats.c b/drivers/infiniband/hw/ipath/ipath_stats.c
index f027141..fd89765 100644
--- a/drivers/infiniband/hw/ipath/ipath_stats.c
+++ b/drivers/infiniband/hw/ipath/ipath_stats.c
@@ -133,15 +133,16 @@ bail:
 static void ipath_qcheck(struct ipath_devdata *dd)
 {
 	static u64 last_tot_hdrqfull;
+	struct ipath_portdata *pd = dd->ipath_pd[0];
 	size_t blen = 0;
 	char buf[128];
 
 	*buf = 0;
-	if (dd->ipath_pd[0]->port_hdrqfull != dd->ipath_p0_hdrqfull) {
+	if (pd->port_hdrqfull != dd->ipath_p0_hdrqfull) {
 		blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u",
-				dd->ipath_pd[0]->port_hdrqfull -
+				pd->port_hdrqfull -
 				dd->ipath_p0_hdrqfull);
-		dd->ipath_p0_hdrqfull = dd->ipath_pd[0]->port_hdrqfull;
+		dd->ipath_p0_hdrqfull = pd->port_hdrqfull;
 	}
 	if (ipath_stats.sps_etidfull != dd->ipath_last_tidfull) {
 		blen += snprintf(buf + blen, sizeof buf - blen,
@@ -173,7 +174,7 @@ static void ipath_qcheck(struct ipath_devdata *dd)
 	if (blen)
 		ipath_dbg("%s\n", buf);
 
-	if (dd->ipath_port0head != (u32)
+	if (pd->port_head != (u32)
 	    le64_to_cpu(*dd->ipath_hdrqtailptr)) {
 		if (dd->ipath_lastport0rcv_cnt ==
 		    ipath_stats.sps_port0pkts) {
@@ -181,7 +182,7 @@ static void ipath_qcheck(struct ipath_devdata *dd)
 				   "port0 hd=%llx tl=%x; port0pkts %llx\n",
 				   (unsigned long long)
 				   le64_to_cpu(*dd->ipath_hdrqtailptr),
-				   dd->ipath_port0head,
+				   pd->port_head,
 				   (unsigned long long)
 				   ipath_stats.sps_port0pkts);
 		}