[POWERPC] Add EEH sysfs blinkenlights

Add sysfs blinkenlights for EEH statistics.  Shuffle the
eeh_add_device_tree() call so that it appears in the correct
sequence.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
----
 arch/powerpc/platforms/pseries/Makefile    |    2
 arch/powerpc/platforms/pseries/eeh.c       |    4 +
 arch/powerpc/platforms/pseries/eeh_cache.c |    2
 arch/powerpc/platforms/pseries/eeh_sysfs.c |   84 +++++++++++++++++++++++++++++
 arch/powerpc/platforms/pseries/pci_dlpar.c |    7 +-
 include/asm-powerpc/ppc-pci.h              |    3 +
 6 files changed, 98 insertions(+), 4 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index ae1fc92..992ba67 100644 (file)
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -8,7 +8,7 @@ obj-y                   := lpar.o hvCall.o nvram.o reconfig.o \
 obj-$(CONFIG_SMP)      += smp.o
 obj-$(CONFIG_XICS)     += xics.o
 obj-$(CONFIG_SCANLOG)  += scanlog.o
-obj-$(CONFIG_EEH)      += eeh.o eeh_cache.o eeh_driver.o eeh_event.o
+obj-$(CONFIG_EEH)      += eeh.o eeh_cache.o eeh_driver.o eeh_event.o eeh_sysfs.o
 obj-$(CONFIG_KEXEC)    += kexec.o
 obj-$(CONFIG_PCI)      += pci.o pci_dlpar.o
 obj-$(CONFIG_PCI_MSI)  += msi.o

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 5f3e6d8..d284a58 100644 (file)
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -1139,7 +1139,8 @@ static void eeh_add_device_late(struct pci_dev *dev)
        pdn = PCI_DN(dn);
        pdn->pcidev = dev;
 
-       pci_addr_cache_insert_device (dev);
+       pci_addr_cache_insert_device(dev);
+       eeh_sysfs_add_device(dev);
 }
 
 void eeh_add_device_tree_late(struct pci_bus *bus)
@@ -1178,6 +1179,7 @@ static void eeh_remove_device(struct pci_dev *dev)
        printk(KERN_DEBUG "EEH: remove device %s\n", pci_name(dev));
 #endif
        pci_addr_cache_remove_device(dev);
+       eeh_sysfs_remove_device(dev);
 
        dn = pci_device_to_OF_node(dev);
        if (PCI_DN(dn)->pcidev) {

diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/platforms/pseries/eeh_cache.c
index f2bae04..60abea2 100644 (file)
--- a/arch/powerpc/platforms/pseries/eeh_cache.c
+++ b/arch/powerpc/platforms/pseries/eeh_cache.c
@@ -295,6 +295,8 @@ void __init pci_addr_cache_build(void)
                        continue;
                pci_dev_get (dev);  /* matching put is in eeh_remove_device() */
                PCI_DN(dn)->pcidev = dev;
+
+               eeh_sysfs_add_device(dev);
        }
 
 #ifdef DEBUG

diff --git a/arch/powerpc/platforms/pseries/eeh_sysfs.c b/arch/powerpc/platforms/pseries/eeh_sysfs.c
new file mode 100644 (file)
index 0000000..0543caf
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/eeh_sysfs.c
@@ -0,0 +1,84 @@
+/*
+ * Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
+ * Copyright IBM Corporation 2007
+ * Copyright Linas Vepstas <linas@austin.ibm.com> 2007
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
+ */
+#include <linux/pci.h>
+#include <asm/ppc-pci.h>
+#include <asm/pci-bridge.h>
+#include <linux/kobject.h>
+
+/**
+ * EEH_SHOW_ATTR -- create sysfs entry for eeh statistic
+ * @_name: name of file in sysfs directory
+ * @_memb: name of member in struct pci_dn to access
+ * @_format: printf format for display
+ *
+ * All of the attributes look very similar, so just
+ * auto-gen a cut-n-paste routine to display them.
+ */
+#define EEH_SHOW_ATTR(_name,_memb,_format)               \
+static ssize_t eeh_show_##_name(struct device *dev,      \
+               struct device_attribute *attr, char *buf)          \
+{                                                        \
+       struct pci_dev *pdev = to_pci_dev(dev);               \
+       struct device_node *dn = pci_device_to_OF_node(pdev); \
+       struct pci_dn *pdn;                                   \
+                                                             \
+       if (!dn || PCI_DN(dn) == NULL)                        \
+               return 0;                                          \
+                                                             \
+       pdn = PCI_DN(dn);                                     \
+       return sprintf(buf, _format "\n", pdn->_memb);        \
+}                                                        \
+static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
+
+
+EEH_SHOW_ATTR(eeh_mode, eeh_mode, "0x%x");
+EEH_SHOW_ATTR(eeh_config_addr, eeh_config_addr, "0x%x");
+EEH_SHOW_ATTR(eeh_pe_config_addr, eeh_pe_config_addr, "0x%x");
+EEH_SHOW_ATTR(eeh_check_count, eeh_check_count, "%d");
+EEH_SHOW_ATTR(eeh_freeze_count, eeh_freeze_count, "%d");
+
+void eeh_sysfs_add_device(struct pci_dev *pdev)
+{
+       int rc=0;
+
+       rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
+       rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
+       rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
+       rc += device_create_file(&pdev->dev, &dev_attr_eeh_check_count);
+       rc += device_create_file(&pdev->dev, &dev_attr_eeh_freeze_count);
+
+       if (rc)
+               printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");
+}
+
+void eeh_sysfs_remove_device(struct pci_dev *pdev)
+{
+       device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
+       device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
+       device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
+       device_remove_file(&pdev->dev, &dev_attr_eeh_check_count);
+       device_remove_file(&pdev->dev, &dev_attr_eeh_freeze_count);
+}
+

diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c
index ffaf6c5..0b113ab 100644 (file)
--- a/arch/powerpc/platforms/pseries/pci_dlpar.c
+++ b/arch/powerpc/platforms/pseries/pci_dlpar.c
@@ -110,8 +110,6 @@ pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
                        }
                }
        }
-
-       eeh_add_device_tree_late(bus);
 }
 EXPORT_SYMBOL_GPL(pcibios_fixup_new_pci_devices);
 
@@ -139,6 +137,8 @@ pcibios_pci_config_bridge(struct pci_dev *dev)
 
        /* Make the discovered devices available */
        pci_bus_add_devices(child_bus);
+
+       eeh_add_device_tree_late(child_bus);
        return 0;
 }
 
@@ -171,6 +171,7 @@ pcibios_add_pci_devices(struct pci_bus * bus)
                if (!list_empty(&bus->devices)) {
                        pcibios_fixup_new_pci_devices(bus, 0);
                        pci_bus_add_devices(bus);
+                       eeh_add_device_tree_late(bus);
                }
        } else if (mode == PCI_PROBE_NORMAL) {
                /* use legacy probe */
@@ -179,6 +180,7 @@ pcibios_add_pci_devices(struct pci_bus * bus)
                if (num) {
                        pcibios_fixup_new_pci_devices(bus, 1);
                        pci_bus_add_devices(bus);
+                       eeh_add_device_tree_late(bus);
                }
 
                list_for_each_entry(dev, &bus->devices, bus_list)
@@ -210,6 +212,7 @@ struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn)
        scan_phb(phb);
        pcibios_fixup_new_pci_devices(phb->bus, 0);
        pci_bus_add_devices(phb->bus);
+       eeh_add_device_tree_late(phb->bus);
 
        return phb;
 }

diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h
index 8e20051..2a6ac69 100644 (file)
--- a/include/asm-powerpc/ppc-pci.h
+++ b/include/asm-powerpc/ppc-pci.h
@@ -139,6 +139,9 @@ void eeh_clear_slot (struct device_node *dn, int mode_flag);
  */
 struct device_node * find_device_pe(struct device_node *dn);
 
+void eeh_sysfs_add_device(struct pci_dev *pdev);
+void eeh_sysfs_remove_device(struct pci_dev *pdev);
+
 #endif /* CONFIG_EEH */
 
 #else /* CONFIG_PCI */