[PATCH 2/5] powerpc/powernv: Retrieve IODA2 tables explicitly

[Gavin Shan]

The PHB3, which is compatible with IODA2, have lots of tables (RTT/
PETLV/PEST/IVT/RBA) in system memory and have corresponding BARs to
trace the system memory address. The tables have been allocated in
firmware and exported through device-tree. The patch retrieves the
tables explicitly.

Signed-off-by: Gavin Shan <shangw at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/opal.h           |    5 +--
 arch/powerpc/platforms/powernv/pci-ioda.c |   35 +++++++++++++++++++++++++++++
 arch/powerpc/platforms/powernv/pci.h      |   13 ++++++++++
 3 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index a4b28f1..0af7ba0 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -491,9 +491,8 @@ int64_t opal_pci_map_pe_mmio_window(uint64_t phb_id, uint16_t pe_number,
 				    uint16_t window_type, uint16_t window_num,
 				    uint16_t segment_num);
 int64_t opal_pci_set_phb_table_memory(uint64_t phb_id, uint64_t rtt_addr,
-				      uint64_t ivt_addr, uint64_t ivt_len,
-				      uint64_t reject_array_addr,
-				      uint64_t peltv_addr);
+				      uint64_t peltv_addr, uint64_t pest_addr,
+				      uint64_t ivt_addr, uint64_t rba_addr);
 int64_t opal_pci_set_pe(uint64_t phb_id, uint64_t pe_number, uint64_t bus_dev_func,
 			uint8_t bus_compare, uint8_t dev_compare, uint8_t func_compare,
 			uint8_t pe_action);
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 3d4e958..0c15870 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -852,6 +852,23 @@ static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus,
 	return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
 }
 
+static void __init pnv_pci_get_ioda2_table(struct device_node *np,
+					   const char *name,
+					   void **table,
+					   unsigned int *len)
+{
+	const u32 *prop32;
+	u64 base;
+
+	prop32 = of_get_property(np, name, NULL);
+	if (prop32) {
+		base = be32_to_cpup(prop32);
+		base = base << 32 | be32_to_cpup(prop32 + 1);
+		*table = __va(base);
+		*len = be32_to_cpup(prop32 + 2);
+	}
+}
+
 void __init pnv_pci_init_ioda_phb(struct device_node *np, int ioda_type)
 {
 	struct pci_controller *hose;
@@ -998,6 +1015,24 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np, int ioda_type)
 	ppc_md.pcibios_window_alignment = pnv_pci_window_alignment;
 	pci_add_flags(PCI_REASSIGN_ALL_RSRC);
 
+	/* Retrieve variable IODA2 tables */
+	if (ioda_type == PNV_PHB_IODA2) {
+		pnv_pci_get_ioda2_table(np, "ibm,opal-rtt-table",
+				&phb->ioda.tbl_rtt, &phb->ioda.rtt_len);
+		pnv_pci_get_ioda2_table(np, "ibm,opal-peltv-table",
+				&phb->ioda.tbl_peltv, &phb->ioda.peltv_len);
+		pnv_pci_get_ioda2_table(np, "ibm,opal-pest-table",
+				&phb->ioda.tbl_pest, &phb->ioda.pest_len);
+		pnv_pci_get_ioda2_table(np, "ibm,opal-ivt-table",
+				&phb->ioda.tbl_ivt, &phb->ioda.ivt_len);
+		pnv_pci_get_ioda2_table(np, "ibm,opal-rba-table",
+				&phb->ioda.tbl_rba, &phb->ioda.rba_len);
+		/* Get IVE stride */
+		prop32 = of_get_property(np, "ibm,opal-ive-stride", NULL);
+		if (prop32)
+			phb->ioda.ive_stride = be32_to_cpup(prop32);
+	}
+
 	/* Reset IODA tables to a clean state */
 	rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET);
 	if (rc)
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index f6314d6..c048c29 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -100,6 +100,19 @@ struct pnv_phb {
 			unsigned int		io_segsize;
 			unsigned int		io_pci_base;
 
+			/* Variable tables for IODA2 */
+			void			*tbl_rtt;
+			void			*tbl_peltv;
+			void			*tbl_pest;
+			void			*tbl_ivt;
+			void			*tbl_rba;
+			unsigned int		ive_stride;
+			unsigned int		rtt_len;
+			unsigned int		peltv_len;
+			unsigned int		pest_len;
+			unsigned int		ivt_len;
+			unsigned int		rba_len;
+
 			/* PE allocation bitmap */
 			unsigned long		*pe_alloc;
 
-- 
1.7.5.4