linux-kernel - [PATCH 1/4] arm64: smccc: Add PCI SMCCCs

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Message-Id: <20220725163905.2024437-2-jeremy.linton@arm.com>
Date:   Mon, 25 Jul 2022 11:39:02 -0500
From:   Jeremy Linton <jeremy.linton@....com>
To:     linux-pci@...r.kernel.org
Cc:     will@...nel.org, bhelgaas@...gle.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, lpieralisi@...nel.org,
        kw@...ux.com, mark.rutland@....com, sudeep.holla@....com,
        boqun.feng@...il.com, catalin.marinas@....com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jeremy Linton <jeremy.linton@....com>
Subject: [PATCH 1/4] arm64: smccc: Add PCI SMCCCs

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@....com>
---
 include/linux/arm-smccc.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

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
-- 
2.37.1