[PATCH v2 10/19] ppc/pnv: Introduce a num_stack class attribute

["Cédric Le Goater" <clg@kaod.org>]

Each PEC device of the POWER9 chip has a predefined number of stacks,
equivalent of a root port complex:

  PEC0 -> 1 stack
  PEC1 -> 2 stacks
  PEC2 -> 3 stacks

Introduce a class attribute to hold these values and remove the
"num-stacks" property.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/pci-host/pnv_phb4.h |  1 +
 hw/pci-host/pnv_phb4_pec.c     | 12 +++++++++++-
 hw/ppc/pnv.c                   |  7 -------
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/include/hw/pci-host/pnv_phb4.h b/include/hw/pci-host/pnv_phb4.h
index 8a585c9a42f7..60de3031a622 100644
--- a/include/hw/pci-host/pnv_phb4.h
+++ b/include/hw/pci-host/pnv_phb4.h
@@ -223,6 +223,7 @@ struct PnvPhb4PecClass {
     int stk_compat_size;
     uint64_t version;
     uint64_t device_id;
+    const uint32_t *num_stacks;
 };
 
 #endif /* PCI_HOST_PNV_PHB4_H */
diff --git a/hw/pci-host/pnv_phb4_pec.c b/hw/pci-host/pnv_phb4_pec.c
index 4b32b5ae6ed4..293909b5cb90 100644
--- a/hw/pci-host/pnv_phb4_pec.c
+++ b/hw/pci-host/pnv_phb4_pec.c
@@ -377,6 +377,7 @@ static void pnv_pec_instance_init(Object *obj)
 static void pnv_pec_realize(DeviceState *dev, Error **errp)
 {
     PnvPhb4PecState *pec = PNV_PHB4_PEC(dev);
+    PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
     char name[64];
     int i;
 
@@ -387,6 +388,8 @@ static void pnv_pec_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    pec->num_stacks = pecc->num_stacks[pec->index];
+
     /* Create stacks */
     for (i = 0; i < pec->num_stacks; i++) {
         PnvPhb4PecStack *stack = &pec->stacks[i];
@@ -465,7 +468,6 @@ static int pnv_pec_dt_xscom(PnvXScomInterface *dev, void *fdt,
 
 static Property pnv_pec_properties[] = {
         DEFINE_PROP_UINT32("index", PnvPhb4PecState, index, 0),
-        DEFINE_PROP_UINT32("num-stacks", PnvPhb4PecState, num_stacks, 0),
         DEFINE_PROP_UINT32("chip-id", PnvPhb4PecState, chip_id, 0),
         DEFINE_PROP_LINK("chip", PnvPhb4PecState, chip, TYPE_PNV_CHIP,
                          PnvChip *),
@@ -484,6 +486,13 @@ static uint32_t pnv_pec_xscom_nest_base(PnvPhb4PecState *pec)
     return PNV9_XSCOM_PEC_NEST_BASE + 0x400 * pec->index;
 }
 
+/*
+ * PEC0 -> 1 stack
+ * PEC1 -> 2 stacks
+ * PEC2 -> 3 stacks
+ */
+static const uint32_t pnv_pec_num_stacks[] = { 1, 2, 3 };
+
 static void pnv_pec_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -508,6 +517,7 @@ static void pnv_pec_class_init(ObjectClass *klass, void *data)
     pecc->stk_compat_size = sizeof(stk_compat);
     pecc->version = PNV_PHB4_VERSION;
     pecc->device_id = PNV_PHB4_DEVICE_ID;
+    pecc->num_stacks = pnv_pec_num_stacks;
 }
 
 static const TypeInfo pnv_pec_type_info = {
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 2f8d0c19aab7..87edbbe91e0f 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1393,13 +1393,6 @@ static void pnv_chip_power9_phb_realize(PnvChip *chip, Error **errp)
         uint32_t pec_pci_base;
 
         object_property_set_int(OBJECT(pec), "index", i, &error_fatal);
-        /*
-         * PEC0 -> 1 stack
-         * PEC1 -> 2 stacks
-         * PEC2 -> 3 stacks
-         */
-        object_property_set_int(OBJECT(pec), "num-stacks", i + 1,
-                                &error_fatal);
         object_property_set_int(OBJECT(pec), "chip-id", chip->chip_id,
                                 &error_fatal);
         object_property_set_link(OBJECT(pec), "chip", OBJECT(chip),
-- 
2.31.1