[edk2-platforms: PATCH v3 11/14] Marvell/Armada70x0Db: Enable ACPI PCIE support

["Marcin Wojtas" <mw@semihalf.com>]

This patch adds description of the PCIE controller in
ACPI tables of Armada 7040 DB board.

Due to the quirky nature of the Synopsys Designware PCIe IP,
the type 0 configuration is broadcast and whatever device
is plugged into slot, will appear at each 32 device
positions of bus0.

In order to prevent above, shift the config space base address
to the second half of the smallest ATU window (64kB), and limit
bus number to 1. Thanks to this, the pci-host-generic driver
could be used in OS with ACPI, however with the limitation
to support only single device in the slot.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db.inf       |   1 +
 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Pcie.h    |  26 +++++
 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Dsdt.asl  | 108 ++++++++++++++++++++
 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Mcfg.aslc |  47 +++++++++
 4 files changed, 182 insertions(+)
 create mode 100644 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Pcie.h
 create mode 100644 Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Mcfg.aslc

diff --git a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db.inf b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db.inf
index 926f366..f3cce52 100644
--- a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db.inf
+++ b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db.inf
@@ -19,6 +19,7 @@
 
 [Sources]
   Armada70x0Db/Dsdt.asl
+  Armada70x0Db/Mcfg.aslc
   Fadt.aslc
   Gtdt.aslc
   Madt.aslc
diff --git a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Pcie.h b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Pcie.h
new file mode 100644
index 0000000..d7b6124
--- /dev/null
+++ b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Pcie.h
@@ -0,0 +1,26 @@
+/**
+
+  Copyright (C) 2019, Marvell International Ltd. and its affiliates.
+
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution. The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#define PCI_BUS_MIN        0x0
+#define PCI_BUS_MAX        0x0
+#define PCI_BUS_COUNT      0x1
+#define PCI_MMIO32_BASE    0xC0000000
+#define PCI_MMIO32_SIZE    0x20000000
+#define PCI_MMIO64_BASE    0x800000000
+#define PCI_MMIO64_SIZE    0x100000000
+#define PCI_IO_BASE        0x0
+#define PCI_IO_SIZE        0x10000
+#define PCI_IO_TRANSLATION 0xEFF00000
+#define PCI_ECAM_BASE      0xE0008000
+#define PCI_ECAM_SIZE      0x10000000
diff --git a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Dsdt.asl b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Dsdt.asl
index 20369c5..90b191b 100644
--- a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Dsdt.asl
+++ b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Dsdt.asl
@@ -9,6 +9,7 @@
 
 **/
 
+#include "Armada70x0Db/Pcie.h"
 #include "IcuInterrupts.h"
 
 DefinitionBlock ("DSDT.aml", "DSDT", 2, "MVEBU ", "ARMADA7K", 3)
@@ -219,5 +220,112 @@ DefinitionBlock ("DSDT.aml", "DSDT", 2, "MVEBU ", "ARMADA7K", 3)
                 }
             })
         }
+
+        //
+        // PCIe Root Bus
+        //
+        Device (PCI0)
+        {
+            Name (_HID, "PNP0A08" /* PCI Express Bus */)  // _HID: Hardware ID
+            Name (_CID, "PNP0A03" /* PCI Bus */)  // _CID: Compatible ID
+            Name (_SEG, 0x00)  // _SEG: PCI Segment
+            Name (_BBN, 0x00)  // _BBN: BIOS Bus Number
+            Name (_CCA, 0x01)  // _CCA: Cache Coherency Attribute
+            Name (_PRT, Package ()  // _PRT: PCI Routing Table
+            {
+                Package () { 0xFFFF, 0x0, 0x0, 0x40 },
+                Package () { 0xFFFF, 0x1, 0x0, 0x40 },
+                Package () { 0xFFFF, 0x2, 0x0, 0x40 },
+                Package () { 0xFFFF, 0x3, 0x0, 0x40 }
+            })
+
+            Method (_CRS, 0, Serialized)  // _CRS: Current Resource Settings
+            {
+                Name (RBUF, ResourceTemplate ()
+                {
+                    WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
+                        0x0000,                             // Granularity
+                        PCI_BUS_MIN,                        // Range Minimum
+                        PCI_BUS_MAX,                        // Range Maximum
+                        0x0000,                             // Translation Offset
+                        PCI_BUS_COUNT                       // Length
+                        )
+                    DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite,
+                        0x00000000,                         // Granularity
+                        PCI_MMIO32_BASE,                    // Range Minimum
+                        0xDFFFFFFF,                         // Range Maximum
+                        0x00000000,                         // Translation Offset
+                        PCI_MMIO32_SIZE                     // Length
+                        )
+                    QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite,
+                        0x0000000000000000,                 // Granularity
+                        PCI_MMIO64_BASE,                    // Range Minimum
+                        0x8FFFFFFFF,                        // Range Maximum
+                        0x00000000,                         // Translation Offset
+                        PCI_MMIO64_SIZE                     // Length
+                        )
+                    DWordIo (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
+                        0x00000000,                         // Granularity
+                        PCI_IO_BASE,                        // Range Minimum
+                        0x0000FFFF,                         // Range Maximum
+                        PCI_IO_TRANSLATION,                 // Translation Address
+                        PCI_IO_SIZE,                        // Length
+                        ,
+                        ,
+                        ,
+                        TypeTranslation
+                        )
+                })
+                Return (RBUF) /* \_SB_.PCI0._CRS.RBUF */
+            } // Method(_CRS)
+
+            Device (RES0)
+            {
+                Name (_HID, "PNP0C02")
+                Name (_CRS, ResourceTemplate ()
+                {
+                    Memory32Fixed (ReadWrite,
+                                   PCI_ECAM_BASE,
+                                   PCI_ECAM_SIZE
+                                   )
+                })
+            }
+            Name (SUPP, 0x00)
+            Name (CTRL, 0x00)
+            Method (_OSC, 4, NotSerialized)  // _OSC: Operating System Capabilities
+            {
+                CreateDWordField (Arg3, 0x00, CDW1)
+                If (LEqual (Arg0, ToUUID ("33db4d5b-1ff7-401c-9657-7441c03dd766") /* PCI Host Bridge Device */))
+                {
+                    CreateDWordField (Arg3, 0x04, CDW2)
+                    CreateDWordField (Arg3, 0x08, CDW3)
+                    Store (CDW2, SUPP) /* \_SB_.PCI0.SUPP */
+                    Store (CDW3, CTRL) /* \_SB_.PCI0.CTRL */
+                    If (LNotEqual (And (SUPP, 0x16), 0x16))
+                    {
+                        And (CTRL, 0x1E, CTRL) /* \_SB_.PCI0.CTRL */
+                    }
+
+                    And (CTRL, 0x1D, CTRL) /* \_SB_.PCI0.CTRL */
+                    If (LNotEqual (Arg1, One))
+                    {
+                        Or (CDW1, 0x08, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
+                    }
+
+                    If (LNotEqual (CDW3, CTRL))
+                    {
+                        Or (CDW1, 0x10, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
+                    }
+
+                    Store (CTRL, CDW3) /* \_SB_.PCI0._OSC.CDW3 */
+                    Return (Arg3)
+                }
+                Else
+                {
+                    Or (CDW1, 0x04, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
+                    Return (Arg3)
+                }
+            } // Method(_OSC)
+        }
     }
 }
diff --git a/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Mcfg.aslc b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Mcfg.aslc
new file mode 100644
index 0000000..90bf163
--- /dev/null
+++ b/Silicon/Marvell/Armada7k8k/AcpiTables/Armada70x0Db/Mcfg.aslc
@@ -0,0 +1,47 @@
+/** @file
+
+  Memory mapped config space base address table (MCFG)
+
+  Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
+  Copyright (c) 2019, Marvell International Ltd. and its affiliates.<BR>
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/AcpiLib.h>
+
+#include "AcpiHeader.h"
+#include "Armada70x0Db/Pcie.h"
+
+#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>
+
+#pragma pack(1)
+typedef struct {
+  EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER Header;
+  EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE Structure;
+} ACPI_6_0_MCFG_STRUCTURE;
+#pragma pack()
+
+STATIC ACPI_6_0_MCFG_STRUCTURE Mcfg = {
+  {
+    __ACPI_HEADER (EFI_ACPI_5_0_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
+                   ACPI_6_0_MCFG_STRUCTURE,
+                   EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION),
+    EFI_ACPI_RESERVED_QWORD
+  }, {
+    PCI_ECAM_BASE,                   // BaseAddress
+    0,                               // PciSegmentGroupNumber
+    PCI_BUS_MIN,                     // StartBusNumber
+    PCI_BUS_MAX,                     // EndBusNumber
+    EFI_ACPI_RESERVED_DWORD          // Reserved
+  }
+};
+
+VOID CONST * CONST ReferenceAcpiTable = &Mcfg;
-- 
2.7.4