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[RFC PATCH v3 cxl-2.0-doe 0/2] Version 3 patch series for PCIe DOE for P
From: |
Chris Browy |
Subject: |
[RFC PATCH v3 cxl-2.0-doe 0/2] Version 3 patch series for PCIe DOE for PCIe and CXL 2.0 |
Date: |
Tue, 9 Mar 2021 15:33:49 -0500 |
Version 3 patch series for PCIe DOE for PCIe and CXL 2.0 implements
all planned functionality.
Based on QEMU version:
https://gitlab.com/bwidawsk/qemu/-/tree/cxl-2.0v4
Summary:
1: PCIe DOE support for Discovery
- Support multiple DOE instances for each own protocol set
- MSI-X and polling supported
- Update error and interrupt status in DOE Status register
- Use static array to register callback function for DOE protocols
- Deprecate DOE_SUCCESS and DOE_DISCARD
- Add license headers
2: CXL DOE for CDAT and Compliance Mode.
- Device supports pre-defined CDAT or user-provided CDAT.
- Support on reading the iASL aml file via specifying
"cdat=<filename.aml>" property to -device cxl-type3
skips over the ACPI header and writes only CDAT table entries
- Clean up CXL compliance structures
- DOE CDAT response returns one CDAT Structure instance based on
request EntryHandle value.
Example cdat.dat file: (compile with iasl -G cdat.dat)
CDAT file may contain any mix and number of supported CDAT Structure types
----------------------
/* Header */
Signature : "CDAT"
Table Length : 00000000
Revision : 01
Checksum : 00
Oem ID : AVERY
Oem Table ID : 0
Oem Revision : 1
Asl Compiler ID : "INTL"
Asl Compiler Revision : 20160527
/* CDAT structures */
Label : DSMAS // Field Byte Length
UINT8 : 0 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0018 // Length 2
UINT8 : 00 // DSMADHandle 1
UINT8 : 00 // Flags 1
UINT16 : 0000 // Reserved 2
UINT64 : 0000000000000000 // DPA Base 8
UINT64 : ffffffffffffffff // DPA Length 8
Label : DSLBIS // Field Byte Length
UINT8 : 01 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0018 // Length 2
UINT8 : 00 // Handle 1
UINT8 : 00 // Flags 1
UINT8 : 00 // Data Type 1
UINT8 : 00 // Reserved 1
UINT64 : 0000000000000000 // Entry Base Unit 8
UINT16 : 0000 // Entry[0] 2
UINT16 : 0000 // Entry[1] 2
UINT16 : 0000 // Entry[2] 2
UINT16 : 0000 // Reserved 2
Label: DSMSCIS // Field Byte Length
UINT8 : 02 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0014 // Length 2
UINT8 : 00 // DSMASHandle 1
UINT24 : 000000 // Reserved 3
UINT64 : 0000000000000000 // Memory Side Cache Size 8
UINT32 : 00000000 // Cache Attributes 4
Label : DSIS // Field Byte Length
UINT8 : 03 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0008 // Length 2
UINT8 : 00 // Flags 1
UINT8 : 00 // Handle 1
UINT16 : 0000 // Reserved 2
Label : DSEMTS // Field Byte Length
UINT8 : 04 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0018 // Length 2
UINT8 : 00 // DSMAS Handle 1
UINT8 : 00 // EFI Memory Type and Attribute 1
UINT16 : 0000 // Reserved 2
UINT64 : 0000000000000000 // DPA Offset 8
UINT64 : 0000000000000000 // DPA Length 8
Label : SSLBIS // Field Byte Length
UINT8 : 05 // Type 1
UINT8 : 00 // Reserved 1
UINT16 : 0020 // Length 2
UINT8 : 00 // Data Type 1
UINT24 : 000000 // Reserved 3
UINT64 : 0000000000000000 // Entry Base Unit 8
Label : SSLBE // SSLBE[0]
UINT16 : 0000 // Port X ID 2
UINT16 : 0000 // Port Y ID 2
UINT16 : 0000 // Latency or Bandwidth 2
UINT16 : BBBB // Reserved 2
Label : SSLBE // SSLBE[1]
UINT16 : 0000 // Port X ID 2
UINT16 : 0000 // Port Y ID 2
UINT16 : 0000 // Latency or Bandwidth 2
UINT16 : BBBC // Reserved 2
----
References:
1. CXL 2.0 specification
https://www.computeexpresslink.org/download-the-specification
2. PCI-SIG ECN: Data Object Exchange (DOE)
http://www.pcisig.com
3. Coherent Device Attribute Table CDAT 1.02
https://uefi.org/sites/default/files/resources/Coherent%20Device%20Attribute%20Table_1.02.pdf
---
Chris Browy (2):
Basic PCIe DOE support
CXL DOE support for CDAT and Compliance Mode
MAINTAINERS | 49 +--
hw/cxl/cxl-component-utils.c | 93 +++++
hw/mem/cxl_type3.c | 184 ++++++++++
hw/pci/meson.build | 1 +
hw/pci/pci.c | 13 +-
hw/pci/pcie_doe.c | 416 ++++++++++++++++++++++
include/hw/cxl/cxl_cdat.h | 127 +++++++
include/hw/cxl/cxl_compl.h | 252 +++++++++++++
include/hw/cxl/cxl_component.h | 74 ++++
include/hw/cxl/cxl_device.h | 4 +
include/hw/cxl/cxl_pci.h | 2 +
include/hw/pci/pci_ids.h | 5 +-
include/hw/pci/pcie.h | 1 +
include/hw/pci/pcie_doe.h | 142 ++++++++
include/hw/pci/pcie_regs.h | 4 +
include/standard-headers/linux/pci_regs.h | 3 +-
16 files changed, 1327 insertions(+), 43 deletions(-)
create mode 100644 hw/pci/pcie_doe.c
create mode 100644 include/hw/cxl/cxl_cdat.h
create mode 100644 include/hw/cxl/cxl_compl.h
create mode 100644 include/hw/pci/pcie_doe.h
--
2.17.1
- [RFC PATCH v3 cxl-2.0-doe 0/2] Version 3 patch series for PCIe DOE for PCIe and CXL 2.0,
Chris Browy <=