diff mbox series

[1/4] arm64: smccc: Add PCI SMCCCs

Message ID 20220725163905.2024437-2-jeremy.linton@arm.com (mailing list archive)
State Rejected
Headers show
Series PCI SMC conduit, now with DT support | expand

Commit Message

Jeremy Linton July 25, 2022, 4:39 p.m. UTC 
Arm defined a set of SMC calls for accessing PCIe config
space in The Arm PCI Configuration Space Access Firmware
Interface:
https://developer.arm.com/documentation/den0115/latest

Add the definitions.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
 include/linux/arm-smccc.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 220c8c60e021..1071a997ba98 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -182,6 +182,35 @@ 
 			   ARM_SMCCC_OWNER_STANDARD,		\
 			   0x53)
 
+/* PCI ECAM conduit (defined by ARM DEN0115A) */
+#define SMCCC_PCI_VERSION						\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   ARM_SMCCC_OWNER_STANDARD, 0x0130)
+
+#define SMCCC_PCI_FEATURES						\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   ARM_SMCCC_OWNER_STANDARD, 0x0131)
+
+#define SMCCC_PCI_READ							\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   ARM_SMCCC_OWNER_STANDARD, 0x0132)
+
+#define SMCCC_PCI_WRITE							\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   ARM_SMCCC_OWNER_STANDARD, 0x0133)
+
+#define SMCCC_PCI_SEG_INFO						\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,				\
+			   ARM_SMCCC_SMC_32,				\
+			   ARM_SMCCC_OWNER_STANDARD, 0x0134)
+
+#define SMCCC_PCI_SEG_INFO_START_BUS  GENMASK(7, 0)
+#define SMCCC_PCI_SEG_INFO_END_BUS    GENMASK(15, 8)
+
 /*
  * Return codes defined in ARM DEN 0070A
  * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C