[PATCH 5/9] powerpc/eeh: Introduce eeh_ops->event()

[Gavin Shan]

The patch introduces eeh_ops->event() so that we can pass various
events to underly platform. One reason to have that is to allocate
or free PHB diag-data for individual PEs on PowerNV platform in
future when EEH core to create or destroy PE instances.

Signed-off-by: Gavin Shan <sha...@linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/eeh.h |    6 ++++++
 arch/powerpc/kernel/eeh_pe.c   |   14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index a61b06f..8fd1c2d 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -71,6 +71,7 @@ struct eeh_pe {
        struct list_head child_list;    /* Link PE to the child list    */
        struct list_head edevs;         /* Link list of EEH devices     */
        struct list_head child;         /* Child PEs                    */
+       void *data;                     /* Platform dependent data      */
 };
 
 #define eeh_pe_for_each_dev(pe, edev, tmp) \
@@ -151,6 +152,10 @@ enum {
 #define EEH_LOG_TEMP           1       /* EEH temporary error log      */
 #define EEH_LOG_PERM           2       /* EEH permanent error log      */
 
+/* EEH events sent to platform */
+#define EEH_EVENT_PE_ALLOC     0
+#define EEH_EVENT_PE_FREE      1
+
 struct eeh_ops {
        char *name;
        int (*init)(void);
@@ -168,6 +173,7 @@ struct eeh_ops {
        int (*write_config)(struct device_node *dn, int where, int size, u32 
val);
        int (*next_error)(struct eeh_pe **pe);
        int (*restore_config)(struct device_node *dn);
+       int (*event)(int event, void *data);
 };
 
 extern struct eeh_ops *eeh_ops;
diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index 2add834..6cdc7a8 100644
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -44,6 +44,7 @@ static LIST_HEAD(eeh_phb_pe);
 static struct eeh_pe *eeh_pe_alloc(struct pci_controller *phb, int type)
 {
        struct eeh_pe *pe;
+       int ret;
 
        /* Allocate PHB PE */
        pe = kzalloc(sizeof(struct eeh_pe), GFP_KERNEL);
@@ -56,6 +57,16 @@ static struct eeh_pe *eeh_pe_alloc(struct pci_controller 
*phb, int type)
        INIT_LIST_HEAD(&pe->child);
        INIT_LIST_HEAD(&pe->edevs);
 
+       if (eeh_ops->event) {
+               ret = eeh_ops->event(EEH_EVENT_PE_ALLOC, pe);
+               if (ret) {
+                       pr_warn("%s: Can't alloc PE (%d)\n",
+                               __func__, ret);
+                       kfree(pe);
+                       return NULL;
+               }
+       }
+
        return pe;
 }
 
@@ -77,6 +88,9 @@ static void eeh_pe_free(struct eeh_pe *pe)
                return;
        }
 
+       if (eeh_ops->event)
+               eeh_ops->event(EEH_EVENT_PE_FREE, pe);
+
        kfree(pe);
 }
 
-- 
1.7.10.4

_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev