[PATCH v9 01/15] PCI/RCEC: Add RCEC class code and extended capability

Sean V Kelley
2020-10-16T00:12:24Z

From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>

A PCIe Root Complex Event Collector (RCEC) has base class 0x08, sub-class
0x07, and programming interface 0x00. Add the class code 0x0807 to
identify RCEC devices and add #defines for the RCEC Endpoint Association
Extended Capability.

See PCIe r5.0, sec 1.3.4 ("Root Complex Event Collector") and sec 7.9.10
("Root Complex Event Collector Endpoint Association Extended Capability").

Link: https://lore.kernel.org/r/20201002184735.1229220-2-seanvk.dev@oregontracks.org
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
include/linux/pci_ids.h | 1 +
include/uapi/linux/pci_regs.h | 7 +++++++
2 files changed, 8 insertions(+)

diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 1ab1e24bcbce..d8156a5dbee8 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -81,6 +81,7 @@
#define PCI_CLASS_SYSTEM_RTC 0x0803
#define PCI_CLASS_SYSTEM_PCI_HOTPLUG 0x0804
#define PCI_CLASS_SYSTEM_SDHCI 0x0805
+#define PCI_CLASS_SYSTEM_RCEC 0x0807
#define PCI_CLASS_SYSTEM_OTHER 0x0880

#define PCI_BASE_CLASS_INPUT 0x09
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index f9701410d3b5..f6475a9e63d8 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -828,6 +828,13 @@
#define PCI_PWR_CAP_BUDGET(x) ((x) & 1) /* Included in system budget */
#define PCI_EXT_CAP_PWR_SIZEOF 16

+/* Root Complex Event Collector Endpoint Association */
+#define PCI_RCEC_RCIEP_BITMAP 4 /* Associated Bitmap for RCiEPs */
+#define PCI_RCEC_BUSN 8 /* RCEC Associated Bus Numbers */
+#define PCI_RCEC_BUSN_REG_VER 0x02 /* Least version with BUSN present */
+#define PCI_RCEC_BUSN_NEXT(x) (((x) >> 8) & 0xff)
+#define PCI_RCEC_BUSN_LAST(x) (((x) >> 16) & 0xff)
+
/* Vendor-Specific (VSEC, PCI_EXT_CAP_ID_VNDR) */
#define PCI_VNDR_HEADER 4 /* Vendor-Specific Header */
#define PCI_VNDR_HEADER_ID(x) ((x) & 0xffff)
--
2.28.0