[Qemu-ppc] [PATCH 03/12] spapr: add helper to retrieve a PHB/device DrcEntry

[Michael Roth]

Signed-off-by: Michael Roth <address@hidden>
---
 hw/ppc/spapr.c         | 23 +++++++++++++++++++++++
 include/hw/ppc/spapr.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 90b25b3..39cb0bb 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -309,6 +309,29 @@ sPAPRDrcEntry *spapr_phb_to_drc_entry(uint64_t buid)
      return NULL;
 }
 
+sPAPRDrcEntry *spapr_find_drc_entry(int drc_index)
+{
+    int i, j;
+
+    for (i = 0; i < SPAPR_DRC_TABLE_SIZE; i++) {
+        sPAPRDrcEntry *phb_entry = &spapr->drc_table[i];
+        if (phb_entry->drc_index == drc_index) {
+            return phb_entry;
+        }
+        if (phb_entry->child_entries == NULL) {
+            continue;
+        }
+        for (j = 0; j < SPAPR_DRC_PHB_SLOT_MAX; j++) {
+            sPAPRDrcEntry *entry = &phb_entry->child_entries[j];
+            if (entry->drc_index == drc_index) {
+                return entry;
+            }
+        }
+     }
+
+     return NULL;
+}
+
 static void spapr_init_drc_table(void)
 {
     int i;
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index c93794b..0ac1a19 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -516,5 +516,6 @@ int spapr_tcet_dma_dt(void *fdt, int node_off, const char 
*propname,
                       sPAPRTCETable *tcet);
 sPAPRDrcEntry *spapr_add_phb_to_drc_table(uint64_t buid, uint32_t state);
 sPAPRDrcEntry *spapr_phb_to_drc_entry(uint64_t buid);
+sPAPRDrcEntry *spapr_find_drc_entry(int drc_index);
 
 #endif /* !defined (__HW_SPAPR_H__) */
-- 
1.9.1