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Message-Id: <20220722214944.831438-5-shorne@gmail.com>
Date: Sat, 23 Jul 2022 06:49:44 +0900
From: Stafford Horne <shorne@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Arnd Bergmann <arnd@...db.de>, Stafford Horne <shorne@...il.com>,
Pierre Morel <pmorel@...ux.ibm.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Richard Weinberger <richard@....at>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Johannes Berg <johannes@...solutions.net>,
Bjorn Helgaas <bhelgaas@...gle.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-um@...ts.infradead.org,
linux-pci@...r.kernel.org, linux-arch@...r.kernel.org
Subject: [PATCH v6 4/4] asm-generic: Add new pci.h and use it
The asm/pci.h used for many newer architectures share similar
definitions. Move the common parts to asm-generic/pci.h to allow for
sharing code.
Suggested-by: Arnd Bergmann <arnd@...db.de>
Link: https://lore.kernel.org/lkml/CAK8P3a0JmPeczfmMBE__vn=Jbvf=nkbpVaZCycyv40pZNCJJXQ@mail.gmail.com/
Acked-by: Pierre Morel <pmorel@...ux.ibm.com>
Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Stafford Horne <shorne@...il.com>
---
Since v5:
- Remove unneeded include in asm-generic/pci.h
arch/arm64/include/asm/pci.h | 10 ++--------
arch/csky/include/asm/pci.h | 17 ++---------------
arch/riscv/include/asm/pci.h | 23 ++++-------------------
arch/um/include/asm/pci.h | 14 ++------------
include/asm-generic/pci.h | 30 ++++++++++++++++++++++++++++++
5 files changed, 40 insertions(+), 54 deletions(-)
create mode 100644 include/asm-generic/pci.h
diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
index 682c922b5658..016eb6b46dc0 100644
--- a/arch/arm64/include/asm/pci.h
+++ b/arch/arm64/include/asm/pci.h
@@ -9,7 +9,6 @@
#include <asm/io.h>
#define PCIBIOS_MIN_IO 0x1000
-#define PCIBIOS_MIN_MEM 0
/*
* Set to 1 if the kernel should re-assign all PCI bus numbers
@@ -18,13 +17,8 @@
(pci_has_flag(PCI_REASSIGN_ALL_BUS))
#define arch_can_pci_mmap_wc() 1
-#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
-#ifdef CONFIG_PCI
-static inline int pci_proc_domain(struct pci_bus *bus)
-{
- return 1;
-}
-#endif /* CONFIG_PCI */
+/* Generic PCI */
+#include <asm-generic/pci.h>
#endif /* __ASM_PCI_H */
diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h
index 875bc028f8f6..42724c630d30 100644
--- a/arch/csky/include/asm/pci.h
+++ b/arch/csky/include/asm/pci.h
@@ -9,20 +9,7 @@
#include <asm/io.h>
-#define PCIBIOS_MIN_IO 0
-#define PCIBIOS_MIN_MEM 0
-
-/* C-SKY shim does not initialize PCI bus */
-#define pcibios_assign_all_busses() 1
-
-#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
-
-#ifdef CONFIG_PCI
-static inline int pci_proc_domain(struct pci_bus *bus)
-{
- /* always show the domain in /proc */
- return 1;
-}
-#endif /* CONFIG_PCI */
+/* Generic PCI */
+#include <asm-generic/pci.h>
#endif /* __ASM_CSKY_PCI_H */
diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h
index f904df586c03..6ef4a1426194 100644
--- a/arch/riscv/include/asm/pci.h
+++ b/arch/riscv/include/asm/pci.h
@@ -12,23 +12,7 @@
#include <asm/io.h>
-#define PCIBIOS_MIN_IO 0
-#define PCIBIOS_MIN_MEM 0
-
-/* RISC-V shim does not initialize PCI bus */
-#define pcibios_assign_all_busses() 1
-
-#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
-
-#ifdef CONFIG_PCI
-static inline int pci_proc_domain(struct pci_bus *bus)
-{
- /* always show the domain in /proc */
- return 1;
-}
-
-#ifdef CONFIG_NUMA
-
+#if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
static inline int pcibus_to_node(struct pci_bus *bus)
{
return dev_to_node(&bus->dev);
@@ -38,8 +22,9 @@ static inline int pcibus_to_node(struct pci_bus *bus)
cpu_all_mask : \
cpumask_of_node(pcibus_to_node(bus)))
#endif
-#endif /* CONFIG_NUMA */
+#endif /* defined(CONFIG_PCI) && defined(CONFIG_NUMA) */
-#endif /* CONFIG_PCI */
+/* Generic PCI */
+#include <asm-generic/pci.h>
#endif /* _ASM_RISCV_PCI_H */
diff --git a/arch/um/include/asm/pci.h b/arch/um/include/asm/pci.h
index 1211855aff34..34fe4921b5fa 100644
--- a/arch/um/include/asm/pci.h
+++ b/arch/um/include/asm/pci.h
@@ -4,18 +4,8 @@
#include <linux/types.h>
#include <asm/io.h>
-#define PCIBIOS_MIN_IO 0
-#define PCIBIOS_MIN_MEM 0
-
-#define pcibios_assign_all_busses() 1
-
-#ifdef CONFIG_PCI_DOMAINS
-static inline int pci_proc_domain(struct pci_bus *bus)
-{
- /* always show the domain in /proc */
- return 1;
-}
-#endif /* CONFIG_PCI */
+/* Generic PCI */
+#include <asm-generic/pci.h>
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
/*
diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
new file mode 100644
index 000000000000..6869f1061528
--- /dev/null
+++ b/include/asm-generic/pci.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ASM_GENERIC_PCI_H
+#define __ASM_GENERIC_PCI_H
+
+#ifndef PCIBIOS_MIN_IO
+#define PCIBIOS_MIN_IO 0
+#endif
+
+#ifndef PCIBIOS_MIN_MEM
+#define PCIBIOS_MIN_MEM 0
+#endif
+
+#ifndef pcibios_assign_all_busses
+/* For bootloaders that do not initialize the PCI bus */
+#define pcibios_assign_all_busses() 1
+#endif
+
+/* Enable generic resource mapping code in drivers/pci/ */
+#define ARCH_GENERIC_PCI_MMAP_RESOURCE
+
+#ifdef CONFIG_PCI_DOMAINS
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+ /* always show the domain in /proc */
+ return 1;
+}
+#endif /* CONFIG_PCI_DOMAINS */
+
+#endif /* __ASM_GENERIC_PCI_H */
--
2.36.1
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