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authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-10 10:03:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-10 10:03:55 -0800
commit942c88cc112d9038049a4d66dd0fb0da7b30667f (patch)
tree9e5db3f2ef27722f5209e20c8d4e6c89290f1cf3
parentcba767175becadc5c4016cceb7bfdd2c7fe722f4 (diff)
parent98873f53becea9a8a46972ff252e96fe575b120d (diff)
downloadlinux-2.6.34-ux500-942c88cc112d9038049a4d66dd0fb0da7b30667f.tar.gz
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: Better than nothing implementation of PCI mmap to fix X.
-rw-r--r--arch/mips/include/asm/pci.h5
-rw-r--r--arch/mips/pci/pci.c24
2 files changed, 29 insertions, 0 deletions
diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h
index 5510c53b7fe..053e4634ace 100644
--- a/arch/mips/include/asm/pci.h
+++ b/arch/mips/include/asm/pci.h
@@ -79,6 +79,11 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
/* We don't do dynamic PCI IRQ allocation */
}
+#define HAVE_PCI_MMAP
+
+extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine);
+
/*
* Dynamic DMA mapping stuff.
* MIPS has everything mapped statically.
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index a377e9d2d02..62cae740e25 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -354,6 +354,30 @@ EXPORT_SYMBOL(PCIBIOS_MIN_IO);
EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
#endif
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine)
+{
+ unsigned long prot;
+
+ /*
+ * I/O space can be accessed via normal processor loads and stores on
+ * this platform but for now we elect not to do this and portable
+ * drivers should not do this anyway.
+ */
+ if (mmap_state == pci_mmap_io)
+ return -EINVAL;
+
+ /*
+ * Ignore write-combine; for now only return uncached mappings.
+ */
+ prot = pgprot_val(vma->vm_page_prot);
+ prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
+ vma->vm_page_prot = __pgprot(prot);
+
+ return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ vma->vm_end - vma->vm_start, vma->vm_page_prot);
+}
+
char * (*pcibios_plat_setup)(char *str) __devinitdata;
char *__devinit pcibios_setup(char *str)