[PATCH v2 10/12] powerpc/mm: refactor ioremap_range() and use ioremap_page_range()
Christophe Leroy
christophe.leroy at c-s.fr
Wed Aug 21 00:07:18 AEST 2019
book3s64's ioremap_range() is almost same as fallback ioremap_range(),
except that it calls radix__ioremap_range() when radix is enabled.
radix__ioremap_range() is also very similar to the other ones, expect
that it calls ioremap_page_range when slab is available.
PPC32 __ioremap_caller() have a loop doing the same thing as
ioremap_range() so use it on PPC32 as well.
Lets keep only one version of ioremap_range() which calls
ioremap_page_range() on all platforms when slab is available.
At the same time, drop the nid parameter which is not used.
Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
---
arch/powerpc/include/asm/book3s/64/radix.h | 3 ---
arch/powerpc/include/asm/io.h | 2 ++
arch/powerpc/mm/book3s64/pgtable.c | 21 ---------------------
arch/powerpc/mm/book3s64/radix_pgtable.c | 20 --------------------
arch/powerpc/mm/ioremap.c | 24 ++++++++++++++++++++++++
arch/powerpc/mm/ioremap_32.c | 6 ++----
arch/powerpc/mm/ioremap_64.c | 21 +--------------------
7 files changed, 29 insertions(+), 68 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
index e04a839cb5b9..574eca33f893 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -266,9 +266,6 @@ extern void radix__vmemmap_remove_mapping(unsigned long start,
extern int radix__map_kernel_page(unsigned long ea, unsigned long pa,
pgprot_t flags, unsigned int psz);
-extern int radix__ioremap_range(unsigned long ea, phys_addr_t pa,
- unsigned long size, pgprot_t prot, int nid);
-
static inline unsigned long radix__get_tree_size(void)
{
unsigned long rts_field;
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 8e65ba59f06a..8e00d95f9600 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -722,6 +722,8 @@ void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size);
extern void iounmap(volatile void __iomem *addr);
+int ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot);
+
extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size,
pgprot_t prot, void *caller);
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c
index 7d0e0d0d22c4..4c8bed856533 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -446,24 +446,3 @@ int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
return true;
}
-
-int ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot, int nid)
-{
- unsigned long i;
-
- if (radix_enabled())
- return radix__ioremap_range(ea, pa, size, prot, nid);
-
- for (i = 0; i < size; i += PAGE_SIZE) {
- int err = map_kernel_page(ea + i, pa + i, prot);
- if (err) {
- if (slab_is_available())
- unmap_kernel_range(ea, size);
- else
- WARN_ON_ONCE(1); /* Should clean up */
- return err;
- }
- }
-
- return 0;
-}
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index b4ca9e95e678..01d47a763a8d 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -1218,26 +1218,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
return 1;
}
-int radix__ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size,
- pgprot_t prot, int nid)
-{
- if (likely(slab_is_available())) {
- int err = ioremap_page_range(ea, ea + size, pa, prot);
- if (err)
- unmap_kernel_range(ea, size);
- return err;
- } else {
- unsigned long i;
-
- for (i = 0; i < size; i += PAGE_SIZE) {
- int err = map_kernel_page(ea + i, pa + i, prot);
- if (WARN_ON_ONCE(err)) /* Should clean up */
- return err;
- }
- return 0;
- }
-}
-
int __init arch_ioremap_p4d_supported(void)
{
return 0;
diff --git a/arch/powerpc/mm/ioremap.c b/arch/powerpc/mm/ioremap.c
index eaf5f8a4a63f..50ee6544d0b7 100644
--- a/arch/powerpc/mm/ioremap.c
+++ b/arch/powerpc/mm/ioremap.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include <asm/io-workarounds.h>
unsigned long ioremap_bot;
@@ -56,3 +58,25 @@ void __iomem *ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long f
return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
}
EXPORT_SYMBOL(ioremap_prot);
+
+int ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot)
+{
+ unsigned long i;
+
+ if (slab_is_available()) {
+ int err = ioremap_page_range(ea, ea + size, pa, prot);
+
+ if (err)
+ unmap_kernel_range(ea, size);
+ return err;
+ }
+
+ for (i = 0; i < size; i += PAGE_SIZE) {
+ int err = map_kernel_page(ea + i, pa + i, prot);
+
+ if (WARN_ON_ONCE(err)) /* Should clean up */
+ return err;
+ }
+
+ return 0;
+}
diff --git a/arch/powerpc/mm/ioremap_32.c b/arch/powerpc/mm/ioremap_32.c
index fb43ba71aa54..85b90a62e084 100644
--- a/arch/powerpc/mm/ioremap_32.c
+++ b/arch/powerpc/mm/ioremap_32.c
@@ -17,7 +17,7 @@ EXPORT_SYMBOL(ioremap_wt);
void __iomem *
__ioremap_caller(phys_addr_t addr, unsigned long size, pgprot_t prot, void *caller)
{
- unsigned long v, i;
+ unsigned long v;
phys_addr_t p;
int err;
@@ -76,9 +76,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, pgprot_t prot, void *call
* Should check if it is a candidate for a BAT mapping
*/
- err = 0;
- for (i = 0; i < size && err == 0; i += PAGE_SIZE)
- err = map_kernel_page(v + i, p + i, prot);
+ err = ioremap_range((unsigned long)v, p, size, prot);
if (err) {
if (slab_is_available())
vunmap((void *)v);
diff --git a/arch/powerpc/mm/ioremap_64.c b/arch/powerpc/mm/ioremap_64.c
index 57f3b096143c..d132ce1e538d 100644
--- a/arch/powerpc/mm/ioremap_64.c
+++ b/arch/powerpc/mm/ioremap_64.c
@@ -4,25 +4,6 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
-int __weak ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size,
- pgprot_t prot, int nid)
-{
- unsigned long i;
-
- for (i = 0; i < size; i += PAGE_SIZE) {
- int err = map_kernel_page(ea + i, pa + i, prot);
- if (err) {
- if (slab_is_available())
- unmap_kernel_range(ea, size);
- else
- WARN_ON_ONCE(1); /* Should clean up */
- return err;
- }
- }
-
- return 0;
-}
-
/**
* Low level function to establish the page tables for an IO mapping
*/
@@ -41,7 +22,7 @@ void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_
WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
WARN_ON(size & ~PAGE_MASK);
- if (ioremap_range((unsigned long)ea, pa, size, prot, NUMA_NO_NODE))
+ if (ioremap_range((unsigned long)ea, pa, size, prot))
return NULL;
return (void __iomem *)ea;
--
2.13.3
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