IB/ipath: enable GPIO interrupt on HT-460

This is required for even semi-decent performance on OpenIB.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

5 files changed, 25 insertions, 8 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_eeprom.c b/drivers/infiniband/hw/ipath/ipath_eeprom.c
index f11a900e8cd..a2f1ceafcca 100644
--- a/drivers/infiniband/hw/ipath/ipath_eeprom.c
+++ b/drivers/infiniband/hw/ipath/ipath_eeprom.c
@@ -505,11 +505,10 @@ static u8 flash_csum(struct ipath_flash *ifp, int adjust)
  * ipath_get_guid - get the GUID from the i2c device
  * @dd: the infinipath device
  *
- * When we add the multi-chip support, we will probably have to add
- * the ability to use the number of guids field, and get the guid from
- * the first chip's flash, to use for all of them.
+ * We have the capability to use the ipath_nguid field, and get
+ * the guid from the first chip's flash, to use for all of them.
  */
-void ipath_get_guid(struct ipath_devdata *dd)
+void ipath_get_eeprom_info(struct ipath_devdata *dd)
 {
         void *buf;
         struct ipath_flash *ifp;
diff --git a/drivers/infiniband/hw/ipath/ipath_ht400.c b/drivers/infiniband/hw/ipath/ipath_ht400.c
index 4652435998f..fac0a2b74de 100644
--- a/drivers/infiniband/hw/ipath/ipath_ht400.c
+++ b/drivers/infiniband/hw/ipath/ipath_ht400.c
@@ -607,7 +607,12 @@ static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
         case 4:         /* Ponderosa is one of the bringup boards */
                 n = "Ponderosa";
                 break;
-        case 5:         /* HT-460 original production board */
+        case 5:
+                /*
+                 * HT-460 original production board; two production levels, with
+                 * different serial number ranges.   See ipath_ht_early_init() for
+                 * case where we enable IPATH_GPIO_INTR for later serial # range.
+                 */
                 n = "InfiniPath_HT-460";
                 break;
         case 6:
@@ -642,7 +647,7 @@ static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
         if (n)
                 snprintf(name, namelen, "%s", n);
 
-        if (dd->ipath_majrev != 3 || dd->ipath_minrev != 2) {
+        if (dd->ipath_majrev != 3 || (dd->ipath_minrev < 2 || dd->ipath_minrev > 3)) {
                 /*
                  * This version of the driver only supports the HT-400
                  * Rev 3.2
@@ -1520,6 +1525,18 @@ static int ipath_ht_early_init(struct ipath_devdata *dd)
          */
         ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
                          INFINIPATH_S_ABORT);
+
+        ipath_get_eeprom_info(dd);
+        if(dd->ipath_boardrev == 5 && dd->ipath_serial[0] == '1' &&
+                dd->ipath_serial[1] == '2' && dd->ipath_serial[2] == '8') {
+                /*
+                 * Later production HT-460 has same changes as HT-465, so
+                 * can use GPIO interrupts.  They have serial #'s starting
+                 * with 128, rather than 112.
+                 */
+                dd->ipath_flags |= IPATH_GPIO_INTR;
+                dd->ipath_flags &= ~IPATH_POLL_RX_INTR;
+        }
         return 0;
 }
 
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c
index 16f640e1c16..dc83250d26a 100644
--- a/drivers/infiniband/hw/ipath/ipath_init_chip.c
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c
@@ -879,7 +879,6 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit)
 
 done:
         if (!ret) {
-                ipath_get_guid(dd);
                 *dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT;
                 if (!dd->ipath_f_intrsetup(dd)) {
                         /* now we can enable all interrupts from the chip */
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index e6507f8115b..5d92d57b6f5 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -650,7 +650,7 @@ u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32 *);
 void ipath_init_pe800_funcs(struct ipath_devdata *);
 /* init HT-400-specific func */
 void ipath_init_ht400_funcs(struct ipath_devdata *);
-void ipath_get_guid(struct ipath_devdata *);
+void ipath_get_eeprom_info(struct ipath_devdata *);
 u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);
 
 /*
diff --git a/drivers/infiniband/hw/ipath/ipath_pe800.c b/drivers/infiniband/hw/ipath/ipath_pe800.c
index 6318067ab5e..02e8c75b24f 100644
--- a/drivers/infiniband/hw/ipath/ipath_pe800.c
+++ b/drivers/infiniband/hw/ipath/ipath_pe800.c
@@ -1180,6 +1180,8 @@ static int ipath_pe_early_init(struct ipath_devdata *dd)
          */
         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
 
+        ipath_get_eeprom_info(dd);
+
         return 0;
 }