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Date: Thu, 1 Apr 2021 20:46:11 +0800
From: Bixuan Cui <cuibixuan@...wei.com>
To: <linux-kernel@...r.kernel.org>, <linux-s390@...r.kernel.org>
CC: <schnelle@...ux.ibm.com>, <gor@...ux.ibm.com>,
<borntraeger@...ibm.com>, <john.wanghui@...wei.com>
Subject: [PATCH] s390/pci: move ioremap/ioremap_prot/ioremap_wc/ioremap_wt/iounmap to arch/s390/mm/ioremap.c
The ioremap/iounmap is implemented in arch/s390/pci/pci.c.
While CONFIG_PCI is disabled,the compilation error is reported:
s390x-linux-gnu-ld: drivers/pcmcia/cistpl.o: in function `set_cis_map':
cistpl.c:(.text+0x32a): undefined reference to `ioremap'
s390x-linux-gnu-ld: cistpl.c:(.text+0x360): undefined reference to `iounmap'
s390x-linux-gnu-ld: cistpl.c:(.text+0x384): undefined reference to `iounmap'
s390x-linux-gnu-ld: cistpl.c:(.text+0x396): undefined reference to `ioremap'
s390x-linux-gnu-ld: drivers/pcmcia/cistpl.o: in function `release_cis_mem':
cistpl.c:(.text+0xcb8): undefined reference to `iounmap'
Add arch/s390/mm/ioremap.c file and move ioremap/ioremap_wc/ioremap_rt/iounmap
to it to fix the error.
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Bixuan Cui <cuibixuan@...wei.com>
---
arch/s390/include/asm/io.h | 8 ++---
arch/s390/mm/Makefile | 2 +-
arch/s390/mm/ioremap.c | 64 +++++++++++++++++++++++++++++++++
arch/s390/pci/pci.c | 73 ++++++--------------------------------
4 files changed, 80 insertions(+), 67 deletions(-)
create mode 100644 arch/s390/mm/ioremap.c
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index e3882b012bfa..48a55644c34f 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -22,6 +22,10 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
#define IO_SPACE_LIMIT 0
+#define ioremap ioremap
+#define ioremap_wt ioremap_wt
+#define ioremap_wc ioremap_wc
+
void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot);
void __iomem *ioremap(phys_addr_t addr, size_t size);
void __iomem *ioremap_wc(phys_addr_t addr, size_t size);
@@ -51,10 +55,6 @@ static inline void ioport_unmap(void __iomem *p)
#define pci_iomap_wc pci_iomap_wc
#define pci_iomap_wc_range pci_iomap_wc_range
-#define ioremap ioremap
-#define ioremap_wt ioremap_wt
-#define ioremap_wc ioremap_wc
-
#define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count)
#define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
#define memset_io(dst, val, count) zpci_memset_io(dst, val, count)
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index cd67e94c16aa..74c22dfb131b 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -4,7 +4,7 @@
#
obj-y := init.o fault.o extmem.o mmap.o vmem.o maccess.o
-obj-y += page-states.o pageattr.o pgtable.o pgalloc.o
+obj-y += page-states.o pageattr.o pgtable.o pgalloc.o ioremap.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
diff --git a/arch/s390/mm/ioremap.c b/arch/s390/mm/ioremap.c
new file mode 100644
index 000000000000..132e6ddff36f
--- /dev/null
+++ b/arch/s390/mm/ioremap.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 Huawei Ltd.
+ * Author: Bixuan Cui <cuibixuan@...wei.com>
+ */
+#include <linux/vmalloc.h>
+#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/jump_label.h>
+
+static void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot)
+{
+ unsigned long offset, vaddr;
+ struct vm_struct *area;
+ phys_addr_t last_addr;
+
+ last_addr = addr + size - 1;
+ if (!size || last_addr < addr)
+ return NULL;
+
+ offset = addr & ~PAGE_MASK;
+ addr &= PAGE_MASK;
+ size = PAGE_ALIGN(size + offset);
+ area = get_vm_area(size, VM_IOREMAP);
+ if (!area)
+ return NULL;
+
+ vaddr = (unsigned long) area->addr;
+ if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
+ free_vm_area(area);
+ return NULL;
+ }
+ return (void __iomem *) ((unsigned long) area->addr + offset);
+}
+
+void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
+{
+ return __ioremap(addr, size, __pgprot(prot));
+}
+EXPORT_SYMBOL(ioremap_prot);
+
+void __iomem *ioremap(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, PAGE_KERNEL);
+}
+EXPORT_SYMBOL(ioremap);
+
+void __iomem *ioremap_wc(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, pgprot_writecombine(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(ioremap_wc);
+
+void __iomem *ioremap_wt(phys_addr_t addr, size_t size)
+{
+ return __ioremap(addr, size, pgprot_writethrough(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(ioremap_wt);
+
+void iounmap(volatile void __iomem *addr)
+{
+ vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
+}
+EXPORT_SYMBOL(iounmap);
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index dd14641b2d20..be300850df9c 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -227,65 +227,6 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
zpci_memcpy_toio(to, from, count);
}
-static void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot)
-{
- unsigned long offset, vaddr;
- struct vm_struct *area;
- phys_addr_t last_addr;
-
- last_addr = addr + size - 1;
- if (!size || last_addr < addr)
- return NULL;
-
- if (!static_branch_unlikely(&have_mio))
- return (void __iomem *) addr;
-
- offset = addr & ~PAGE_MASK;
- addr &= PAGE_MASK;
- size = PAGE_ALIGN(size + offset);
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
-
- vaddr = (unsigned long) area->addr;
- if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
- free_vm_area(area);
- return NULL;
- }
- return (void __iomem *) ((unsigned long) area->addr + offset);
-}
-
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
-{
- return __ioremap(addr, size, __pgprot(prot));
-}
-EXPORT_SYMBOL(ioremap_prot);
-
-void __iomem *ioremap(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, PAGE_KERNEL);
-}
-EXPORT_SYMBOL(ioremap);
-
-void __iomem *ioremap_wc(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, pgprot_writecombine(PAGE_KERNEL));
-}
-EXPORT_SYMBOL(ioremap_wc);
-
-void __iomem *ioremap_wt(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, pgprot_writethrough(PAGE_KERNEL));
-}
-EXPORT_SYMBOL(ioremap_wt);
-
-void iounmap(volatile void __iomem *addr)
-{
- if (static_branch_likely(&have_mio))
- vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
-}
-EXPORT_SYMBOL(iounmap);
-
/* Create a virtual mapping cookie for a PCI BAR */
static void __iomem *pci_iomap_range_fh(struct pci_dev *pdev, int bar,
unsigned long offset, unsigned long max)
@@ -312,7 +253,10 @@ static void __iomem *pci_iomap_range_mio(struct pci_dev *pdev, int bar,
struct zpci_dev *zdev = to_zpci(pdev);
void __iomem *iova;
- iova = ioremap((unsigned long) zdev->bars[bar].mio_wt, barsize);
+ if (!static_branch_unlikely(&have_mio))
+ iova = (void __iomem *) zdev->bars[bar].mio_wt;
+ else
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wt, barsize);
return iova ? iova + offset : iova;
}
@@ -342,7 +286,11 @@ static void __iomem *pci_iomap_wc_range_mio(struct pci_dev *pdev, int bar,
struct zpci_dev *zdev = to_zpci(pdev);
void __iomem *iova;
- iova = ioremap((unsigned long) zdev->bars[bar].mio_wb, barsize);
+ if (!static_branch_unlikely(&have_mio))
+ iova = (void __iomem *) zdev->bars[bar].mio_wb;
+ else
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wb, barsize);
+
return iova ? iova + offset : iova;
}
@@ -381,7 +329,8 @@ static void pci_iounmap_fh(struct pci_dev *pdev, void __iomem *addr)
static void pci_iounmap_mio(struct pci_dev *pdev, void __iomem *addr)
{
- iounmap(addr);
+ if (static_branch_likely(&have_mio))
+ iounmap(addr);
}
void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
--
2.17.1
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