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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-20 14:07:20 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-27 13:03:35 +1000 |
| commit | 163918fc5741d755cf9d477ebfcb761f09b82982 (patch) | |
| tree | 1fe435495b065344b797a5dd55cae150851d6748 /arch/powerpc/mm/ioremap_64.c | |
| parent | 4a45b7460cf458012a6930f675e141256b81dcf4 (diff) | |
| download | linux-163918fc5741d755cf9d477ebfcb761f09b82982.tar.gz linux-163918fc5741d755cf9d477ebfcb761f09b82982.tar.bz2 linux-163918fc5741d755cf9d477ebfcb761f09b82982.zip | |
powerpc/mm: split out early ioremap path.
ioremap does things differently depending on whether
SLAB is available or not at different levels.
Try to separate the early path from the beginning.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3acd2dbe04b04f111475e7a59f2b6f2ab9b95ab6.1566309263.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/mm/ioremap_64.c')
| -rw-r--r-- | arch/powerpc/mm/ioremap_64.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/arch/powerpc/mm/ioremap_64.c b/arch/powerpc/mm/ioremap_64.c index e37b68b7f0e8..fd29e51700cd 100644 --- a/arch/powerpc/mm/ioremap_64.c +++ b/arch/powerpc/mm/ioremap_64.c @@ -9,6 +9,9 @@ */ void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_t prot) { + int ret; + unsigned long va = (unsigned long)ea; + /* We don't support the 4K PFN hack with ioremap */ if (pgprot_val(prot) & H_PAGE_4K_PFN) return NULL; @@ -22,7 +25,15 @@ 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)) + if (slab_is_available()) { + ret = ioremap_page_range(va, va + size, pa, prot); + if (ret) + unmap_kernel_range(va, size); + } else { + ret = early_ioremap_range(va, pa, size, prot); + } + + if (ret) return NULL; return (void __iomem *)ea; @@ -48,6 +59,7 @@ void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size, { phys_addr_t paligned, offset; void __iomem *ret; + int err; /* We don't support the 4K PFN hack with ioremap */ if (pgprot_val(prot) & H_PAGE_4K_PFN) @@ -66,16 +78,16 @@ void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size, if (size == 0 || paligned == 0) return NULL; - if (slab_is_available()) { + if (slab_is_available()) return do_ioremap(paligned, offset, size, prot, caller); - } else { - ret = __ioremap_at(paligned, (void *)ioremap_bot, size, prot); - if (ret) - ioremap_bot += size; - } - if (ret) - ret += addr & ~PAGE_MASK; + err = early_ioremap_range(ioremap_bot, paligned, size, prot); + if (err) + return NULL; + + ret = (void __iomem *)ioremap_bot + offset; + ioremap_bot += size; + return ret; } |