4 files changed, 85 insertions, 23 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_iba6110.c b/drivers/infiniband/hw/ipath/ipath_iba6110.c
index 684c27e42406..19e3955304c0 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6110.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6110.c
@@ -742,11 +742,10 @@ static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
          */
         dd->ipath_flags |= IPATH_32BITCOUNTERS;
         dd->ipath_flags |= IPATH_GPIO_INTR;
-        if (dd->ipath_htspeed != 800)
+        if (dd->ipath_lbus_speed != 800)
                 ipath_dev_err(dd,
                               "Incorrectly configured for HT @ %uMHz\n",
-                              dd->ipath_htspeed);
-        ret = 0;
+                              dd->ipath_lbus_speed);
 
         /*
          * set here, not in ipath_init_*_funcs because we have to do
@@ -911,7 +910,7 @@ static void slave_or_pri_blk(struct ipath_devdata *dd, struct pci_dev *pdev,
                         break;
                 }
 
-                dd->ipath_htwidth = width;
+                dd->ipath_lbus_width = width;
 
                 if (linkwidth != 0x11) {
                         ipath_dev_err(dd, "Not configured for 16 bit HT "
@@ -959,8 +958,13 @@ static void slave_or_pri_blk(struct ipath_devdata *dd, struct pci_dev *pdev,
                         speed = 200;
                         break;
                 }
-                dd->ipath_htspeed = speed;
+                dd->ipath_lbus_speed = speed;
         }
+
+        snprintf(dd->ipath_lbus_info, sizeof(dd->ipath_lbus_info),
+                "HyperTransport,%uMHz,x%u\n",
+                dd->ipath_lbus_speed,
+                dd->ipath_lbus_width);
 }
 
 static int ipath_ht_intconfig(struct ipath_devdata *dd)
diff --git a/drivers/infiniband/hw/ipath/ipath_iba6120.c b/drivers/infiniband/hw/ipath/ipath_iba6120.c
index 8423fee6344b..828066e20ad7 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6120.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6120.c
@@ -626,7 +626,6 @@ static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
                         dd->ipath_f_put_tid = ipath_pe_put_tid_2;
         }
 
-
         /*
          * set here, not in ipath_init_*_funcs because we have to do
          * it after we can read chip registers.
@@ -879,6 +878,62 @@ static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
         pci_disable_msi(dd->pcidev);
 }
 
+static void ipath_6120_pcie_params(struct ipath_devdata *dd)
+{
+        u16 linkstat, speed;
+        int pos;
+
+        pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP);
+        if (!pos) {
+                ipath_dev_err(dd, "Can't find PCI Express capability!\n");
+                goto bail;
+        }
+
+        pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
+                             &linkstat);
+        /*
+         * speed is bits 0-4, linkwidth is bits 4-8
+         * no defines for them in headers
+         */
+        speed = linkstat & 0xf;
+        linkstat >>= 4;
+        linkstat &= 0x1f;
+        dd->ipath_lbus_width = linkstat;
+
+        switch (speed) {
+        case 1:
+                dd->ipath_lbus_speed = 2500; /* Gen1, 2.5GHz */
+                break;
+        case 2:
+                dd->ipath_lbus_speed = 5000; /* Gen1, 5GHz */
+                break;
+        default: /* not defined, assume gen1 */
+                dd->ipath_lbus_speed = 2500;
+                break;
+        }
+
+        if (linkstat < 8)
+                ipath_dev_err(dd,
+                        "PCIe width %u (x8 HCA), performance reduced\n",
+                        linkstat);
+        else
+                ipath_cdbg(VERBOSE, "PCIe speed %u width %u (x8 HCA)\n",
+                        dd->ipath_lbus_speed, linkstat);
+
+        if (speed != 1)
+                ipath_dev_err(dd,
+                        "PCIe linkspeed %u is incorrect; "
+                        "should be 1 (2500)!\n", speed);
+bail:
+        /* fill in string, even on errors */
+        snprintf(dd->ipath_lbus_info, sizeof(dd->ipath_lbus_info),
+                "PCIe,%uMHz,x%u\n",
+                dd->ipath_lbus_speed,
+                dd->ipath_lbus_width);
+
+        return;
+}
+
 /**
  * ipath_setup_pe_config - setup PCIe config related stuff
  * @dd: the infinipath device
@@ -936,19 +991,8 @@ static int ipath_setup_pe_config(struct ipath_devdata *dd,
         } else
                 ipath_dev_err(dd, "Can't find MSI capability, "
                               "can't save MSI settings for reset\n");
-        if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
-                u16 linkstat;
-                pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
-                                     &linkstat);
-                linkstat >>= 4;
-                linkstat &= 0x1f;
-                if (linkstat != 8)
-                        ipath_dev_err(dd, "PCIe width %u, "
-                                      "performance reduced\n", linkstat);
-        }
-        else
-                ipath_dev_err(dd, "Can't find PCI Express "
-                              "capability!\n");
+
+        ipath_6120_pcie_params(dd);
 
         dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
         dd->ipath_link_speed_supported = IPATH_IB_SDR;
@@ -1206,6 +1250,8 @@ static int ipath_setup_pe_reset(struct ipath_devdata *dd)
         ret = 0; /* failed */
 
 bail:
+        if (ret)
+                ipath_6120_pcie_params(dd);
         return ret;
 }
 
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index 3d4a254ffca0..59dc89516243 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -546,10 +546,10 @@ struct ipath_devdata {
         u32 ipath_init_ibmaxlen;
         /* size of each rcvegrbuffer */
         u32 ipath_rcvegrbufsize;
-        /* width (2,4,8,16,32) from HT config reg */
-        u32 ipath_htwidth;
-        /* HT speed (200,400,800,1000) from HT config */
-        u32 ipath_htspeed;
+        /* localbus width (1, 2,4,8,16,32) from config space  */
+        u32 ipath_lbus_width;
+        /* localbus speed (HT: 200,400,800,1000; PCIe 2500) */
+        u32 ipath_lbus_speed;
         /*
          * number of sequential ibcstatus change for polling active/quiet
          * (i.e., link not coming up).
@@ -574,6 +574,7 @@ struct ipath_devdata {
         u8 ipath_serial[16];
         /* human readable board version */
         u8 ipath_boardversion[80];
+        u8 ipath_lbus_info[32]; /* human readable localbus info */
         /* chip major rev, from ipath_revision */
         u8 ipath_majrev;
         /* chip minor rev, from ipath_revision */
diff --git a/drivers/infiniband/hw/ipath/ipath_sysfs.c b/drivers/infiniband/hw/ipath/ipath_sysfs.c
index 56dfc8a2344c..bb41c3f6aad3 100644
--- a/drivers/infiniband/hw/ipath/ipath_sysfs.c
+++ b/drivers/infiniband/hw/ipath/ipath_sysfs.c
@@ -163,6 +163,15 @@ static ssize_t show_boardversion(struct device *dev,
         return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
 }
 
+static ssize_t show_localbus_info(struct device *dev,
+                               struct device_attribute *attr,
+                               char *buf)
+{
+        struct ipath_devdata *dd = dev_get_drvdata(dev);
+        /* The string printed here is already newline-terminated. */
+        return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_lbus_info);
+}
+
 static ssize_t show_lmc(struct device *dev,
                         struct device_attribute *attr,
                         char *buf)
@@ -1011,6 +1020,7 @@ static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
 static DEVICE_ATTR(rx_pol_inv, S_IWUSR, NULL, store_rx_pol_inv);
 static DEVICE_ATTR(led_override, S_IWUSR, NULL, store_led_override);
 static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
+static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
 static DEVICE_ATTR(jint_max_packets, S_IWUSR | S_IRUGO,
                    show_jint_max_packets, store_jint_max_packets);
 static DEVICE_ATTR(jint_idle_ticks, S_IWUSR | S_IRUGO,
@@ -1034,6 +1044,7 @@ static struct attribute *dev_attributes[] = {
         &dev_attr_rx_pol_inv.attr,
         &dev_attr_led_override.attr,
         &dev_attr_logged_errors.attr,
+        &dev_attr_localbus_info.attr,
         NULL
 };