linux-kernel - [PATCH] mips: fix PCI

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Message-Id: <20250318214406.874733-1-arnd@kernel.org>
Date: Tue, 18 Mar 2025 22:43:59 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Huacai Chen <chenhuacai@...nel.org>,
	Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	linux-mips@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mips: fix PCI_IOBASE definition

From: Arnd Bergmann <arnd@...db.de>

After my previous patch, the ioport_map() function changed from
the lib/iomap.c version to the asm-generic/io.h version, which
requires a correct PCI_IOBASE definition.

Unfortunately the types are also different, so add the correct
definition for ioport_map() in asm/io.h and change the machine
specific ones to have the correct type.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
This is not pretty, but it seems to address the remaining problems.
I've applied it on top of my cross-architecture io.h cleanup that
has the other mips patch.

Let me know if there are still any other concerns.


 arch/mips/include/asm/io.h                     | 6 +++++-
 arch/mips/include/asm/mach-loongson64/spaces.h | 5 +++--
 arch/mips/include/asm/mach-ralink/spaces.h     | 2 +-
 arch/mips/loongson64/init.c                    | 4 ++--
 4 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 1fe56d1870a6..78c6573f91f2 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -544,12 +544,16 @@ extern void (*_dma_cache_inv)(unsigned long start, unsigned long size);
 
 void __ioread64_copy(void *to, const void __iomem *from, size_t count);
 
-#ifdef CONFIG_PCI_DRIVERS_LEGACY
+#if defined(CONFIG_PCI) && defined(CONFIG_PCI_DRIVERS_LEGACY)
 struct pci_dev;
 void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
 #define pci_iounmap pci_iounmap
 #endif
 
+#ifndef PCI_IOBASE
+#define PCI_IOBASE ((void __iomem *)mips_io_port_base)
+#endif
+
 #include <asm-generic/io.h>
 
 static inline void *isa_bus_to_virt(unsigned long address)
diff --git a/arch/mips/include/asm/mach-loongson64/spaces.h b/arch/mips/include/asm/mach-loongson64/spaces.h
index ce04e998a37b..dbd26db5f2c5 100644
--- a/arch/mips/include/asm/mach-loongson64/spaces.h
+++ b/arch/mips/include/asm/mach-loongson64/spaces.h
@@ -7,9 +7,10 @@
 #endif /* CONFIG_64BIT */
 
 /* Skip 128k to trap NULL pointer dereferences */
-#define PCI_IOBASE	_AC(0xc000000000000000 + SZ_128K, UL)
+#define PCI_PORT_BASE	_AC(0xc000000000000000 + SZ_128K, UL)
+#define PCI_IOBASE	(void __iomem *)PCI_PORT_BASE
 #define PCI_IOSIZE	SZ_16M
-#define MAP_BASE	(PCI_IOBASE + PCI_IOSIZE)
+#define MAP_BASE	(PCI_PORT_BASE + PCI_IOSIZE)
 
 #define IO_SPACE_LIMIT  (PCI_IOSIZE - 1)
 
diff --git a/arch/mips/include/asm/mach-ralink/spaces.h b/arch/mips/include/asm/mach-ralink/spaces.h
index a9f0570d0f04..a63d106c89c6 100644
--- a/arch/mips/include/asm/mach-ralink/spaces.h
+++ b/arch/mips/include/asm/mach-ralink/spaces.h
@@ -2,7 +2,7 @@
 #ifndef __ASM_MACH_RALINK_SPACES_H_
 #define __ASM_MACH_RALINK_SPACES_H_
 
-#define PCI_IOBASE	mips_io_port_base
+#define PCI_IOBASE	(void __iomem *)mips_io_port_base
 #define PCI_IOSIZE	SZ_64K
 #define IO_SPACE_LIMIT	(PCI_IOSIZE - 1)
 
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index a35dd7311795..b9f90f33fc9a 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -128,7 +128,7 @@ void __init prom_init(void)
 	}
 
 	/* init base address of io space */
-	set_io_port_base(PCI_IOBASE);
+	set_io_port_base((unsigned long)PCI_IOBASE);
 
 	if (loongson_sysconf.early_config)
 		loongson_sysconf.early_config();
@@ -178,7 +178,7 @@ static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_
 		return -EINVAL;
 	}
 
-	vaddr = PCI_IOBASE + range->io_start;
+	vaddr = (unsigned long)PCI_IOBASE + range->io_start;
 
 	vmap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL));
 
-- 
2.39.5